File: | clang/lib/Sema/SemaDecl.cpp |
Warning: | line 16346, column 7 Called C++ object pointer is null |
Press '?' to see keyboard shortcuts
Keyboard shortcuts:
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/ExprCXX.h" | ||||||
25 | #include "clang/AST/NonTrivialTypeVisitor.h" | ||||||
26 | #include "clang/AST/StmtCXX.h" | ||||||
27 | #include "clang/Basic/Builtins.h" | ||||||
28 | #include "clang/Basic/PartialDiagnostic.h" | ||||||
29 | #include "clang/Basic/SourceManager.h" | ||||||
30 | #include "clang/Basic/TargetInfo.h" | ||||||
31 | #include "clang/Lex/HeaderSearch.h" // TODO: Sema shouldn't depend on Lex | ||||||
32 | #include "clang/Lex/Lexer.h" // TODO: Extract static functions to fix layering. | ||||||
33 | #include "clang/Lex/ModuleLoader.h" // TODO: Sema shouldn't depend on Lex | ||||||
34 | #include "clang/Lex/Preprocessor.h" // Included for isCodeCompletionEnabled() | ||||||
35 | #include "clang/Sema/CXXFieldCollector.h" | ||||||
36 | #include "clang/Sema/DeclSpec.h" | ||||||
37 | #include "clang/Sema/DelayedDiagnostic.h" | ||||||
38 | #include "clang/Sema/Initialization.h" | ||||||
39 | #include "clang/Sema/Lookup.h" | ||||||
40 | #include "clang/Sema/ParsedTemplate.h" | ||||||
41 | #include "clang/Sema/Scope.h" | ||||||
42 | #include "clang/Sema/ScopeInfo.h" | ||||||
43 | #include "clang/Sema/SemaInternal.h" | ||||||
44 | #include "clang/Sema/Template.h" | ||||||
45 | #include "llvm/ADT/SmallString.h" | ||||||
46 | #include "llvm/ADT/Triple.h" | ||||||
47 | #include <algorithm> | ||||||
48 | #include <cstring> | ||||||
49 | #include <functional> | ||||||
50 | #include <unordered_map> | ||||||
51 | |||||||
52 | using namespace clang; | ||||||
53 | using namespace sema; | ||||||
54 | |||||||
55 | Sema::DeclGroupPtrTy Sema::ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType) { | ||||||
56 | if (OwnedType) { | ||||||
57 | Decl *Group[2] = { OwnedType, Ptr }; | ||||||
58 | return DeclGroupPtrTy::make(DeclGroupRef::Create(Context, Group, 2)); | ||||||
59 | } | ||||||
60 | |||||||
61 | return DeclGroupPtrTy::make(DeclGroupRef(Ptr)); | ||||||
62 | } | ||||||
63 | |||||||
64 | namespace { | ||||||
65 | |||||||
66 | class TypeNameValidatorCCC final : public CorrectionCandidateCallback { | ||||||
67 | public: | ||||||
68 | TypeNameValidatorCCC(bool AllowInvalid, bool WantClass = false, | ||||||
69 | bool AllowTemplates = false, | ||||||
70 | bool AllowNonTemplates = true) | ||||||
71 | : AllowInvalidDecl(AllowInvalid), WantClassName(WantClass), | ||||||
72 | AllowTemplates(AllowTemplates), AllowNonTemplates(AllowNonTemplates) { | ||||||
73 | WantExpressionKeywords = false; | ||||||
74 | WantCXXNamedCasts = false; | ||||||
75 | WantRemainingKeywords = false; | ||||||
76 | } | ||||||
77 | |||||||
78 | bool ValidateCandidate(const TypoCorrection &candidate) override { | ||||||
79 | if (NamedDecl *ND = candidate.getCorrectionDecl()) { | ||||||
80 | if (!AllowInvalidDecl && ND->isInvalidDecl()) | ||||||
81 | return false; | ||||||
82 | |||||||
83 | if (getAsTypeTemplateDecl(ND)) | ||||||
84 | return AllowTemplates; | ||||||
85 | |||||||
86 | bool IsType = isa<TypeDecl>(ND) || isa<ObjCInterfaceDecl>(ND); | ||||||
87 | if (!IsType) | ||||||
88 | return false; | ||||||
89 | |||||||
90 | if (AllowNonTemplates) | ||||||
91 | return true; | ||||||
92 | |||||||
93 | // An injected-class-name of a class template (specialization) is valid | ||||||
94 | // as a template or as a non-template. | ||||||
95 | if (AllowTemplates) { | ||||||
96 | auto *RD = dyn_cast<CXXRecordDecl>(ND); | ||||||
97 | if (!RD || !RD->isInjectedClassName()) | ||||||
98 | return false; | ||||||
99 | RD = cast<CXXRecordDecl>(RD->getDeclContext()); | ||||||
100 | return RD->getDescribedClassTemplate() || | ||||||
101 | isa<ClassTemplateSpecializationDecl>(RD); | ||||||
102 | } | ||||||
103 | |||||||
104 | return false; | ||||||
105 | } | ||||||
106 | |||||||
107 | return !WantClassName && candidate.isKeyword(); | ||||||
108 | } | ||||||
109 | |||||||
110 | std::unique_ptr<CorrectionCandidateCallback> clone() override { | ||||||
111 | return std::make_unique<TypeNameValidatorCCC>(*this); | ||||||
112 | } | ||||||
113 | |||||||
114 | private: | ||||||
115 | bool AllowInvalidDecl; | ||||||
116 | bool WantClassName; | ||||||
117 | bool AllowTemplates; | ||||||
118 | bool AllowNonTemplates; | ||||||
119 | }; | ||||||
120 | |||||||
121 | } // end anonymous namespace | ||||||
122 | |||||||
123 | /// Determine whether the token kind starts a simple-type-specifier. | ||||||
124 | bool Sema::isSimpleTypeSpecifier(tok::TokenKind Kind) const { | ||||||
125 | switch (Kind) { | ||||||
126 | // FIXME: Take into account the current language when deciding whether a | ||||||
127 | // token kind is a valid type specifier | ||||||
128 | case tok::kw_short: | ||||||
129 | case tok::kw_long: | ||||||
130 | case tok::kw___int64: | ||||||
131 | case tok::kw___int128: | ||||||
132 | case tok::kw_signed: | ||||||
133 | case tok::kw_unsigned: | ||||||
134 | case tok::kw_void: | ||||||
135 | case tok::kw_char: | ||||||
136 | case tok::kw_int: | ||||||
137 | case tok::kw_half: | ||||||
138 | case tok::kw_float: | ||||||
139 | case tok::kw_double: | ||||||
140 | case tok::kw__Float16: | ||||||
141 | case tok::kw___float128: | ||||||
142 | case tok::kw_wchar_t: | ||||||
143 | case tok::kw_bool: | ||||||
144 | case tok::kw___underlying_type: | ||||||
145 | case tok::kw___auto_type: | ||||||
146 | return true; | ||||||
147 | |||||||
148 | case tok::annot_typename: | ||||||
149 | case tok::kw_char16_t: | ||||||
150 | case tok::kw_char32_t: | ||||||
151 | case tok::kw_typeof: | ||||||
152 | case tok::annot_decltype: | ||||||
153 | case tok::kw_decltype: | ||||||
154 | return getLangOpts().CPlusPlus; | ||||||
155 | |||||||
156 | case tok::kw_char8_t: | ||||||
157 | return getLangOpts().Char8; | ||||||
158 | |||||||
159 | default: | ||||||
160 | break; | ||||||
161 | } | ||||||
162 | |||||||
163 | return false; | ||||||
164 | } | ||||||
165 | |||||||
166 | namespace { | ||||||
167 | enum class UnqualifiedTypeNameLookupResult { | ||||||
168 | NotFound, | ||||||
169 | FoundNonType, | ||||||
170 | FoundType | ||||||
171 | }; | ||||||
172 | } // end anonymous namespace | ||||||
173 | |||||||
174 | /// Tries to perform unqualified lookup of the type decls in bases for | ||||||
175 | /// dependent class. | ||||||
176 | /// \return \a NotFound if no any decls is found, \a FoundNotType if found not a | ||||||
177 | /// type decl, \a FoundType if only type decls are found. | ||||||
178 | static UnqualifiedTypeNameLookupResult | ||||||
179 | lookupUnqualifiedTypeNameInBase(Sema &S, const IdentifierInfo &II, | ||||||
180 | SourceLocation NameLoc, | ||||||
181 | const CXXRecordDecl *RD) { | ||||||
182 | if (!RD->hasDefinition()) | ||||||
183 | return UnqualifiedTypeNameLookupResult::NotFound; | ||||||
184 | // Look for type decls in base classes. | ||||||
185 | UnqualifiedTypeNameLookupResult FoundTypeDecl = | ||||||
186 | UnqualifiedTypeNameLookupResult::NotFound; | ||||||
187 | for (const auto &Base : RD->bases()) { | ||||||
188 | const CXXRecordDecl *BaseRD = nullptr; | ||||||
189 | if (auto *BaseTT = Base.getType()->getAs<TagType>()) | ||||||
190 | BaseRD = BaseTT->getAsCXXRecordDecl(); | ||||||
191 | else if (auto *TST = Base.getType()->getAs<TemplateSpecializationType>()) { | ||||||
192 | // Look for type decls in dependent base classes that have known primary | ||||||
193 | // templates. | ||||||
194 | if (!TST || !TST->isDependentType()) | ||||||
195 | continue; | ||||||
196 | auto *TD = TST->getTemplateName().getAsTemplateDecl(); | ||||||
197 | if (!TD) | ||||||
198 | continue; | ||||||
199 | if (auto *BasePrimaryTemplate = | ||||||
200 | dyn_cast_or_null<CXXRecordDecl>(TD->getTemplatedDecl())) { | ||||||
201 | if (BasePrimaryTemplate->getCanonicalDecl() != RD->getCanonicalDecl()) | ||||||
202 | BaseRD = BasePrimaryTemplate; | ||||||
203 | else if (auto *CTD = dyn_cast<ClassTemplateDecl>(TD)) { | ||||||
204 | if (const ClassTemplatePartialSpecializationDecl *PS = | ||||||
205 | CTD->findPartialSpecialization(Base.getType())) | ||||||
206 | if (PS->getCanonicalDecl() != RD->getCanonicalDecl()) | ||||||
207 | BaseRD = PS; | ||||||
208 | } | ||||||
209 | } | ||||||
210 | } | ||||||
211 | if (BaseRD) { | ||||||
212 | for (NamedDecl *ND : BaseRD->lookup(&II)) { | ||||||
213 | if (!isa<TypeDecl>(ND)) | ||||||
214 | return UnqualifiedTypeNameLookupResult::FoundNonType; | ||||||
215 | FoundTypeDecl = UnqualifiedTypeNameLookupResult::FoundType; | ||||||
216 | } | ||||||
217 | if (FoundTypeDecl == UnqualifiedTypeNameLookupResult::NotFound) { | ||||||
218 | switch (lookupUnqualifiedTypeNameInBase(S, II, NameLoc, BaseRD)) { | ||||||
219 | case UnqualifiedTypeNameLookupResult::FoundNonType: | ||||||
220 | return UnqualifiedTypeNameLookupResult::FoundNonType; | ||||||
221 | case UnqualifiedTypeNameLookupResult::FoundType: | ||||||
222 | FoundTypeDecl = UnqualifiedTypeNameLookupResult::FoundType; | ||||||
223 | break; | ||||||
224 | case UnqualifiedTypeNameLookupResult::NotFound: | ||||||
225 | break; | ||||||
226 | } | ||||||
227 | } | ||||||
228 | } | ||||||
229 | } | ||||||
230 | |||||||
231 | return FoundTypeDecl; | ||||||
232 | } | ||||||
233 | |||||||
234 | static ParsedType recoverFromTypeInKnownDependentBase(Sema &S, | ||||||
235 | const IdentifierInfo &II, | ||||||
236 | SourceLocation NameLoc) { | ||||||
237 | // Lookup in the parent class template context, if any. | ||||||
238 | const CXXRecordDecl *RD = nullptr; | ||||||
239 | UnqualifiedTypeNameLookupResult FoundTypeDecl = | ||||||
240 | UnqualifiedTypeNameLookupResult::NotFound; | ||||||
241 | for (DeclContext *DC = S.CurContext; | ||||||
242 | DC && FoundTypeDecl == UnqualifiedTypeNameLookupResult::NotFound; | ||||||
243 | DC = DC->getParent()) { | ||||||
244 | // Look for type decls in dependent base classes that have known primary | ||||||
245 | // templates. | ||||||
246 | RD = dyn_cast<CXXRecordDecl>(DC); | ||||||
247 | if (RD && RD->getDescribedClassTemplate()) | ||||||
248 | FoundTypeDecl = lookupUnqualifiedTypeNameInBase(S, II, NameLoc, RD); | ||||||
249 | } | ||||||
250 | if (FoundTypeDecl != UnqualifiedTypeNameLookupResult::FoundType) | ||||||
251 | return nullptr; | ||||||
252 | |||||||
253 | // We found some types in dependent base classes. Recover as if the user | ||||||
254 | // wrote 'typename MyClass::II' instead of 'II'. We'll fully resolve the | ||||||
255 | // lookup during template instantiation. | ||||||
256 | S.Diag(NameLoc, diag::ext_found_via_dependent_bases_lookup) << &II; | ||||||
257 | |||||||
258 | ASTContext &Context = S.Context; | ||||||
259 | auto *NNS = NestedNameSpecifier::Create(Context, nullptr, false, | ||||||
260 | cast<Type>(Context.getRecordType(RD))); | ||||||
261 | QualType T = Context.getDependentNameType(ETK_Typename, NNS, &II); | ||||||
262 | |||||||
263 | CXXScopeSpec SS; | ||||||
264 | SS.MakeTrivial(Context, NNS, SourceRange(NameLoc)); | ||||||
265 | |||||||
266 | TypeLocBuilder Builder; | ||||||
267 | DependentNameTypeLoc DepTL = Builder.push<DependentNameTypeLoc>(T); | ||||||
268 | DepTL.setNameLoc(NameLoc); | ||||||
269 | DepTL.setElaboratedKeywordLoc(SourceLocation()); | ||||||
270 | DepTL.setQualifierLoc(SS.getWithLocInContext(Context)); | ||||||
271 | return S.CreateParsedType(T, Builder.getTypeSourceInfo(Context, T)); | ||||||
272 | } | ||||||
273 | |||||||
274 | /// If the identifier refers to a type name within this scope, | ||||||
275 | /// return the declaration of that type. | ||||||
276 | /// | ||||||
277 | /// This routine performs ordinary name lookup of the identifier II | ||||||
278 | /// within the given scope, with optional C++ scope specifier SS, to | ||||||
279 | /// determine whether the name refers to a type. If so, returns an | ||||||
280 | /// opaque pointer (actually a QualType) corresponding to that | ||||||
281 | /// type. Otherwise, returns NULL. | ||||||
282 | ParsedType Sema::getTypeName(const IdentifierInfo &II, SourceLocation NameLoc, | ||||||
283 | Scope *S, CXXScopeSpec *SS, | ||||||
284 | bool isClassName, bool HasTrailingDot, | ||||||
285 | ParsedType ObjectTypePtr, | ||||||
286 | bool IsCtorOrDtorName, | ||||||
287 | bool WantNontrivialTypeSourceInfo, | ||||||
288 | bool IsClassTemplateDeductionContext, | ||||||
289 | IdentifierInfo **CorrectedII) { | ||||||
290 | // FIXME: Consider allowing this outside C++1z mode as an extension. | ||||||
291 | bool AllowDeducedTemplate = IsClassTemplateDeductionContext && | ||||||
292 | getLangOpts().CPlusPlus17 && !IsCtorOrDtorName && | ||||||
293 | !isClassName && !HasTrailingDot; | ||||||
294 | |||||||
295 | // Determine where we will perform name lookup. | ||||||
296 | DeclContext *LookupCtx = nullptr; | ||||||
297 | if (ObjectTypePtr) { | ||||||
298 | QualType ObjectType = ObjectTypePtr.get(); | ||||||
299 | if (ObjectType->isRecordType()) | ||||||
300 | LookupCtx = computeDeclContext(ObjectType); | ||||||
301 | } else if (SS && SS->isNotEmpty()) { | ||||||
302 | LookupCtx = computeDeclContext(*SS, false); | ||||||
303 | |||||||
304 | if (!LookupCtx) { | ||||||
305 | if (isDependentScopeSpecifier(*SS)) { | ||||||
306 | // C++ [temp.res]p3: | ||||||
307 | // A qualified-id that refers to a type and in which the | ||||||
308 | // nested-name-specifier depends on a template-parameter (14.6.2) | ||||||
309 | // shall be prefixed by the keyword typename to indicate that the | ||||||
310 | // qualified-id denotes a type, forming an | ||||||
311 | // elaborated-type-specifier (7.1.5.3). | ||||||
312 | // | ||||||
313 | // We therefore do not perform any name lookup if the result would | ||||||
314 | // refer to a member of an unknown specialization. | ||||||
315 | if (!isClassName && !IsCtorOrDtorName) | ||||||
316 | return nullptr; | ||||||
317 | |||||||
318 | // We know from the grammar that this name refers to a type, | ||||||
319 | // so build a dependent node to describe the type. | ||||||
320 | if (WantNontrivialTypeSourceInfo) | ||||||
321 | return ActOnTypenameType(S, SourceLocation(), *SS, II, NameLoc).get(); | ||||||
322 | |||||||
323 | NestedNameSpecifierLoc QualifierLoc = SS->getWithLocInContext(Context); | ||||||
324 | QualType T = CheckTypenameType(ETK_None, SourceLocation(), QualifierLoc, | ||||||
325 | II, NameLoc); | ||||||
326 | return ParsedType::make(T); | ||||||
327 | } | ||||||
328 | |||||||
329 | return nullptr; | ||||||
330 | } | ||||||
331 | |||||||
332 | if (!LookupCtx->isDependentContext() && | ||||||
333 | RequireCompleteDeclContext(*SS, LookupCtx)) | ||||||
334 | return nullptr; | ||||||
335 | } | ||||||
336 | |||||||
337 | // FIXME: LookupNestedNameSpecifierName isn't the right kind of | ||||||
338 | // lookup for class-names. | ||||||
339 | LookupNameKind Kind = isClassName ? LookupNestedNameSpecifierName : | ||||||
340 | LookupOrdinaryName; | ||||||
341 | LookupResult Result(*this, &II, NameLoc, Kind); | ||||||
342 | if (LookupCtx) { | ||||||
343 | // Perform "qualified" name lookup into the declaration context we | ||||||
344 | // computed, which is either the type of the base of a member access | ||||||
345 | // expression or the declaration context associated with a prior | ||||||
346 | // nested-name-specifier. | ||||||
347 | LookupQualifiedName(Result, LookupCtx); | ||||||
348 | |||||||
349 | if (ObjectTypePtr && Result.empty()) { | ||||||
350 | // C++ [basic.lookup.classref]p3: | ||||||
351 | // If the unqualified-id is ~type-name, the type-name is looked up | ||||||
352 | // in the context of the entire postfix-expression. If the type T of | ||||||
353 | // the object expression is of a class type C, the type-name is also | ||||||
354 | // looked up in the scope of class C. At least one of the lookups shall | ||||||
355 | // find a name that refers to (possibly cv-qualified) T. | ||||||
356 | LookupName(Result, S); | ||||||
357 | } | ||||||
358 | } else { | ||||||
359 | // Perform unqualified name lookup. | ||||||
360 | LookupName(Result, S); | ||||||
361 | |||||||
362 | // For unqualified lookup in a class template in MSVC mode, look into | ||||||
363 | // dependent base classes where the primary class template is known. | ||||||
364 | if (Result.empty() && getLangOpts().MSVCCompat && (!SS || SS->isEmpty())) { | ||||||
365 | if (ParsedType TypeInBase = | ||||||
366 | recoverFromTypeInKnownDependentBase(*this, II, NameLoc)) | ||||||
367 | return TypeInBase; | ||||||
368 | } | ||||||
369 | } | ||||||
370 | |||||||
371 | NamedDecl *IIDecl = nullptr; | ||||||
372 | switch (Result.getResultKind()) { | ||||||
373 | case LookupResult::NotFound: | ||||||
374 | case LookupResult::NotFoundInCurrentInstantiation: | ||||||
375 | if (CorrectedII) { | ||||||
376 | TypeNameValidatorCCC CCC(/*AllowInvalid=*/true, isClassName, | ||||||
377 | AllowDeducedTemplate); | ||||||
378 | TypoCorrection Correction = CorrectTypo(Result.getLookupNameInfo(), Kind, | ||||||
379 | S, SS, CCC, CTK_ErrorRecovery); | ||||||
380 | IdentifierInfo *NewII = Correction.getCorrectionAsIdentifierInfo(); | ||||||
381 | TemplateTy Template; | ||||||
382 | bool MemberOfUnknownSpecialization; | ||||||
383 | UnqualifiedId TemplateName; | ||||||
384 | TemplateName.setIdentifier(NewII, NameLoc); | ||||||
385 | NestedNameSpecifier *NNS = Correction.getCorrectionSpecifier(); | ||||||
386 | CXXScopeSpec NewSS, *NewSSPtr = SS; | ||||||
387 | if (SS && NNS) { | ||||||
388 | NewSS.MakeTrivial(Context, NNS, SourceRange(NameLoc)); | ||||||
389 | NewSSPtr = &NewSS; | ||||||
390 | } | ||||||
391 | if (Correction && (NNS || NewII != &II) && | ||||||
392 | // Ignore a correction to a template type as the to-be-corrected | ||||||
393 | // identifier is not a template (typo correction for template names | ||||||
394 | // is handled elsewhere). | ||||||
395 | !(getLangOpts().CPlusPlus && NewSSPtr && | ||||||
396 | isTemplateName(S, *NewSSPtr, false, TemplateName, nullptr, false, | ||||||
397 | Template, MemberOfUnknownSpecialization))) { | ||||||
398 | ParsedType Ty = getTypeName(*NewII, NameLoc, S, NewSSPtr, | ||||||
399 | isClassName, HasTrailingDot, ObjectTypePtr, | ||||||
400 | IsCtorOrDtorName, | ||||||
401 | WantNontrivialTypeSourceInfo, | ||||||
402 | IsClassTemplateDeductionContext); | ||||||
403 | if (Ty) { | ||||||
404 | diagnoseTypo(Correction, | ||||||
405 | PDiag(diag::err_unknown_type_or_class_name_suggest) | ||||||
406 | << Result.getLookupName() << isClassName); | ||||||
407 | if (SS && NNS) | ||||||
408 | SS->MakeTrivial(Context, NNS, SourceRange(NameLoc)); | ||||||
409 | *CorrectedII = NewII; | ||||||
410 | return Ty; | ||||||
411 | } | ||||||
412 | } | ||||||
413 | } | ||||||
414 | // If typo correction failed or was not performed, fall through | ||||||
415 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||||
416 | case LookupResult::FoundOverloaded: | ||||||
417 | case LookupResult::FoundUnresolvedValue: | ||||||
418 | Result.suppressDiagnostics(); | ||||||
419 | return nullptr; | ||||||
420 | |||||||
421 | case LookupResult::Ambiguous: | ||||||
422 | // Recover from type-hiding ambiguities by hiding the type. We'll | ||||||
423 | // do the lookup again when looking for an object, and we can | ||||||
424 | // diagnose the error then. If we don't do this, then the error | ||||||
425 | // about hiding the type will be immediately followed by an error | ||||||
426 | // that only makes sense if the identifier was treated like a type. | ||||||
427 | if (Result.getAmbiguityKind() == LookupResult::AmbiguousTagHiding) { | ||||||
428 | Result.suppressDiagnostics(); | ||||||
429 | return nullptr; | ||||||
430 | } | ||||||
431 | |||||||
432 | // Look to see if we have a type anywhere in the list of results. | ||||||
433 | for (LookupResult::iterator Res = Result.begin(), ResEnd = Result.end(); | ||||||
434 | Res != ResEnd; ++Res) { | ||||||
435 | if (isa<TypeDecl>(*Res) || isa<ObjCInterfaceDecl>(*Res) || | ||||||
436 | (AllowDeducedTemplate && getAsTypeTemplateDecl(*Res))) { | ||||||
437 | if (!IIDecl || | ||||||
438 | (*Res)->getLocation().getRawEncoding() < | ||||||
439 | IIDecl->getLocation().getRawEncoding()) | ||||||
440 | IIDecl = *Res; | ||||||
441 | } | ||||||
442 | } | ||||||
443 | |||||||
444 | if (!IIDecl) { | ||||||
445 | // None of the entities we found is a type, so there is no way | ||||||
446 | // to even assume that the result is a type. In this case, don't | ||||||
447 | // complain about the ambiguity. The parser will either try to | ||||||
448 | // perform this lookup again (e.g., as an object name), which | ||||||
449 | // will produce the ambiguity, or will complain that it expected | ||||||
450 | // a type name. | ||||||
451 | Result.suppressDiagnostics(); | ||||||
452 | return nullptr; | ||||||
453 | } | ||||||
454 | |||||||
455 | // We found a type within the ambiguous lookup; diagnose the | ||||||
456 | // ambiguity and then return that type. This might be the right | ||||||
457 | // answer, or it might not be, but it suppresses any attempt to | ||||||
458 | // perform the name lookup again. | ||||||
459 | break; | ||||||
460 | |||||||
461 | case LookupResult::Found: | ||||||
462 | IIDecl = Result.getFoundDecl(); | ||||||
463 | break; | ||||||
464 | } | ||||||
465 | |||||||
466 | assert(IIDecl && "Didn't find decl")((IIDecl && "Didn't find decl") ? static_cast<void > (0) : __assert_fail ("IIDecl && \"Didn't find decl\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 466, __PRETTY_FUNCTION__)); | ||||||
467 | |||||||
468 | QualType T; | ||||||
469 | if (TypeDecl *TD = dyn_cast<TypeDecl>(IIDecl)) { | ||||||
470 | // C++ [class.qual]p2: A lookup that would find the injected-class-name | ||||||
471 | // instead names the constructors of the class, except when naming a class. | ||||||
472 | // This is ill-formed when we're not actually forming a ctor or dtor name. | ||||||
473 | auto *LookupRD = dyn_cast_or_null<CXXRecordDecl>(LookupCtx); | ||||||
474 | auto *FoundRD = dyn_cast<CXXRecordDecl>(TD); | ||||||
475 | if (!isClassName && !IsCtorOrDtorName && LookupRD && FoundRD && | ||||||
476 | FoundRD->isInjectedClassName() && | ||||||
477 | declaresSameEntity(LookupRD, cast<Decl>(FoundRD->getParent()))) | ||||||
478 | Diag(NameLoc, diag::err_out_of_line_qualified_id_type_names_constructor) | ||||||
479 | << &II << /*Type*/1; | ||||||
480 | |||||||
481 | DiagnoseUseOfDecl(IIDecl, NameLoc); | ||||||
482 | |||||||
483 | T = Context.getTypeDeclType(TD); | ||||||
484 | MarkAnyDeclReferenced(TD->getLocation(), TD, /*OdrUse=*/false); | ||||||
485 | } else if (ObjCInterfaceDecl *IDecl = dyn_cast<ObjCInterfaceDecl>(IIDecl)) { | ||||||
486 | (void)DiagnoseUseOfDecl(IDecl, NameLoc); | ||||||
487 | if (!HasTrailingDot) | ||||||
488 | T = Context.getObjCInterfaceType(IDecl); | ||||||
489 | } else if (AllowDeducedTemplate) { | ||||||
490 | if (auto *TD = getAsTypeTemplateDecl(IIDecl)) | ||||||
491 | T = Context.getDeducedTemplateSpecializationType(TemplateName(TD), | ||||||
492 | QualType(), false); | ||||||
493 | } | ||||||
494 | |||||||
495 | if (T.isNull()) { | ||||||
496 | // If it's not plausibly a type, suppress diagnostics. | ||||||
497 | Result.suppressDiagnostics(); | ||||||
498 | return nullptr; | ||||||
499 | } | ||||||
500 | |||||||
501 | // NOTE: avoid constructing an ElaboratedType(Loc) if this is a | ||||||
502 | // constructor or destructor name (in such a case, the scope specifier | ||||||
503 | // will be attached to the enclosing Expr or Decl node). | ||||||
504 | if (SS && SS->isNotEmpty() && !IsCtorOrDtorName && | ||||||
505 | !isa<ObjCInterfaceDecl>(IIDecl)) { | ||||||
506 | if (WantNontrivialTypeSourceInfo) { | ||||||
507 | // Construct a type with type-source information. | ||||||
508 | TypeLocBuilder Builder; | ||||||
509 | Builder.pushTypeSpec(T).setNameLoc(NameLoc); | ||||||
510 | |||||||
511 | T = getElaboratedType(ETK_None, *SS, T); | ||||||
512 | ElaboratedTypeLoc ElabTL = Builder.push<ElaboratedTypeLoc>(T); | ||||||
513 | ElabTL.setElaboratedKeywordLoc(SourceLocation()); | ||||||
514 | ElabTL.setQualifierLoc(SS->getWithLocInContext(Context)); | ||||||
515 | return CreateParsedType(T, Builder.getTypeSourceInfo(Context, T)); | ||||||
516 | } else { | ||||||
517 | T = getElaboratedType(ETK_None, *SS, T); | ||||||
518 | } | ||||||
519 | } | ||||||
520 | |||||||
521 | return ParsedType::make(T); | ||||||
522 | } | ||||||
523 | |||||||
524 | // Builds a fake NNS for the given decl context. | ||||||
525 | static NestedNameSpecifier * | ||||||
526 | synthesizeCurrentNestedNameSpecifier(ASTContext &Context, DeclContext *DC) { | ||||||
527 | for (;; DC = DC->getLookupParent()) { | ||||||
528 | DC = DC->getPrimaryContext(); | ||||||
529 | auto *ND = dyn_cast<NamespaceDecl>(DC); | ||||||
530 | if (ND && !ND->isInline() && !ND->isAnonymousNamespace()) | ||||||
531 | return NestedNameSpecifier::Create(Context, nullptr, ND); | ||||||
532 | else if (auto *RD = dyn_cast<CXXRecordDecl>(DC)) | ||||||
533 | return NestedNameSpecifier::Create(Context, nullptr, RD->isTemplateDecl(), | ||||||
534 | RD->getTypeForDecl()); | ||||||
535 | else if (isa<TranslationUnitDecl>(DC)) | ||||||
536 | return NestedNameSpecifier::GlobalSpecifier(Context); | ||||||
537 | } | ||||||
538 | llvm_unreachable("something isn't in TU scope?")::llvm::llvm_unreachable_internal("something isn't in TU scope?" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 538); | ||||||
539 | } | ||||||
540 | |||||||
541 | /// Find the parent class with dependent bases of the innermost enclosing method | ||||||
542 | /// context. Do not look for enclosing CXXRecordDecls directly, or we will end | ||||||
543 | /// up allowing unqualified dependent type names at class-level, which MSVC | ||||||
544 | /// correctly rejects. | ||||||
545 | static const CXXRecordDecl * | ||||||
546 | findRecordWithDependentBasesOfEnclosingMethod(const DeclContext *DC) { | ||||||
547 | for (; DC && DC->isDependentContext(); DC = DC->getLookupParent()) { | ||||||
548 | DC = DC->getPrimaryContext(); | ||||||
549 | if (const auto *MD = dyn_cast<CXXMethodDecl>(DC)) | ||||||
550 | if (MD->getParent()->hasAnyDependentBases()) | ||||||
551 | return MD->getParent(); | ||||||
552 | } | ||||||
553 | return nullptr; | ||||||
554 | } | ||||||
555 | |||||||
556 | ParsedType Sema::ActOnMSVCUnknownTypeName(const IdentifierInfo &II, | ||||||
557 | SourceLocation NameLoc, | ||||||
558 | bool IsTemplateTypeArg) { | ||||||
559 | assert(getLangOpts().MSVCCompat && "shouldn't be called in non-MSVC mode")((getLangOpts().MSVCCompat && "shouldn't be called in non-MSVC mode" ) ? static_cast<void> (0) : __assert_fail ("getLangOpts().MSVCCompat && \"shouldn't be called in non-MSVC mode\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 559, __PRETTY_FUNCTION__)); | ||||||
560 | |||||||
561 | NestedNameSpecifier *NNS = nullptr; | ||||||
562 | if (IsTemplateTypeArg && getCurScope()->isTemplateParamScope()) { | ||||||
563 | // If we weren't able to parse a default template argument, delay lookup | ||||||
564 | // until instantiation time by making a non-dependent DependentTypeName. We | ||||||
565 | // pretend we saw a NestedNameSpecifier referring to the current scope, and | ||||||
566 | // lookup is retried. | ||||||
567 | // FIXME: This hurts our diagnostic quality, since we get errors like "no | ||||||
568 | // type named 'Foo' in 'current_namespace'" when the user didn't write any | ||||||
569 | // name specifiers. | ||||||
570 | NNS = synthesizeCurrentNestedNameSpecifier(Context, CurContext); | ||||||
571 | Diag(NameLoc, diag::ext_ms_delayed_template_argument) << &II; | ||||||
572 | } else if (const CXXRecordDecl *RD = | ||||||
573 | findRecordWithDependentBasesOfEnclosingMethod(CurContext)) { | ||||||
574 | // Build a DependentNameType that will perform lookup into RD at | ||||||
575 | // instantiation time. | ||||||
576 | NNS = NestedNameSpecifier::Create(Context, nullptr, RD->isTemplateDecl(), | ||||||
577 | RD->getTypeForDecl()); | ||||||
578 | |||||||
579 | // Diagnose that this identifier was undeclared, and retry the lookup during | ||||||
580 | // template instantiation. | ||||||
581 | Diag(NameLoc, diag::ext_undeclared_unqual_id_with_dependent_base) << &II | ||||||
582 | << RD; | ||||||
583 | } else { | ||||||
584 | // This is not a situation that we should recover from. | ||||||
585 | return ParsedType(); | ||||||
586 | } | ||||||
587 | |||||||
588 | QualType T = Context.getDependentNameType(ETK_None, NNS, &II); | ||||||
589 | |||||||
590 | // Build type location information. We synthesized the qualifier, so we have | ||||||
591 | // to build a fake NestedNameSpecifierLoc. | ||||||
592 | NestedNameSpecifierLocBuilder NNSLocBuilder; | ||||||
593 | NNSLocBuilder.MakeTrivial(Context, NNS, SourceRange(NameLoc)); | ||||||
594 | NestedNameSpecifierLoc QualifierLoc = NNSLocBuilder.getWithLocInContext(Context); | ||||||
595 | |||||||
596 | TypeLocBuilder Builder; | ||||||
597 | DependentNameTypeLoc DepTL = Builder.push<DependentNameTypeLoc>(T); | ||||||
598 | DepTL.setNameLoc(NameLoc); | ||||||
599 | DepTL.setElaboratedKeywordLoc(SourceLocation()); | ||||||
600 | DepTL.setQualifierLoc(QualifierLoc); | ||||||
601 | return CreateParsedType(T, Builder.getTypeSourceInfo(Context, T)); | ||||||
602 | } | ||||||
603 | |||||||
604 | /// isTagName() - This method is called *for error recovery purposes only* | ||||||
605 | /// to determine if the specified name is a valid tag name ("struct foo"). If | ||||||
606 | /// so, this returns the TST for the tag corresponding to it (TST_enum, | ||||||
607 | /// TST_union, TST_struct, TST_interface, TST_class). This is used to diagnose | ||||||
608 | /// cases in C where the user forgot to specify the tag. | ||||||
609 | DeclSpec::TST Sema::isTagName(IdentifierInfo &II, Scope *S) { | ||||||
610 | // Do a tag name lookup in this scope. | ||||||
611 | LookupResult R(*this, &II, SourceLocation(), LookupTagName); | ||||||
612 | LookupName(R, S, false); | ||||||
613 | R.suppressDiagnostics(); | ||||||
614 | if (R.getResultKind() == LookupResult::Found) | ||||||
615 | if (const TagDecl *TD = R.getAsSingle<TagDecl>()) { | ||||||
616 | switch (TD->getTagKind()) { | ||||||
617 | case TTK_Struct: return DeclSpec::TST_struct; | ||||||
618 | case TTK_Interface: return DeclSpec::TST_interface; | ||||||
619 | case TTK_Union: return DeclSpec::TST_union; | ||||||
620 | case TTK_Class: return DeclSpec::TST_class; | ||||||
621 | case TTK_Enum: return DeclSpec::TST_enum; | ||||||
622 | } | ||||||
623 | } | ||||||
624 | |||||||
625 | return DeclSpec::TST_unspecified; | ||||||
626 | } | ||||||
627 | |||||||
628 | /// isMicrosoftMissingTypename - In Microsoft mode, within class scope, | ||||||
629 | /// if a CXXScopeSpec's type is equal to the type of one of the base classes | ||||||
630 | /// then downgrade the missing typename error to a warning. | ||||||
631 | /// This is needed for MSVC compatibility; Example: | ||||||
632 | /// @code | ||||||
633 | /// template<class T> class A { | ||||||
634 | /// public: | ||||||
635 | /// typedef int TYPE; | ||||||
636 | /// }; | ||||||
637 | /// template<class T> class B : public A<T> { | ||||||
638 | /// public: | ||||||
639 | /// A<T>::TYPE a; // no typename required because A<T> is a base class. | ||||||
640 | /// }; | ||||||
641 | /// @endcode | ||||||
642 | bool Sema::isMicrosoftMissingTypename(const CXXScopeSpec *SS, Scope *S) { | ||||||
643 | if (CurContext->isRecord()) { | ||||||
644 | if (SS->getScopeRep()->getKind() == NestedNameSpecifier::Super) | ||||||
645 | return true; | ||||||
646 | |||||||
647 | const Type *Ty = SS->getScopeRep()->getAsType(); | ||||||
648 | |||||||
649 | CXXRecordDecl *RD = cast<CXXRecordDecl>(CurContext); | ||||||
650 | for (const auto &Base : RD->bases()) | ||||||
651 | if (Ty && Context.hasSameUnqualifiedType(QualType(Ty, 1), Base.getType())) | ||||||
652 | return true; | ||||||
653 | return S->isFunctionPrototypeScope(); | ||||||
654 | } | ||||||
655 | return CurContext->isFunctionOrMethod() || S->isFunctionPrototypeScope(); | ||||||
656 | } | ||||||
657 | |||||||
658 | void Sema::DiagnoseUnknownTypeName(IdentifierInfo *&II, | ||||||
659 | SourceLocation IILoc, | ||||||
660 | Scope *S, | ||||||
661 | CXXScopeSpec *SS, | ||||||
662 | ParsedType &SuggestedType, | ||||||
663 | bool IsTemplateName) { | ||||||
664 | // Don't report typename errors for editor placeholders. | ||||||
665 | if (II->isEditorPlaceholder()) | ||||||
666 | return; | ||||||
667 | // We don't have anything to suggest (yet). | ||||||
668 | SuggestedType = nullptr; | ||||||
669 | |||||||
670 | // There may have been a typo in the name of the type. Look up typo | ||||||
671 | // results, in case we have something that we can suggest. | ||||||
672 | TypeNameValidatorCCC CCC(/*AllowInvalid=*/false, /*WantClass=*/false, | ||||||
673 | /*AllowTemplates=*/IsTemplateName, | ||||||
674 | /*AllowNonTemplates=*/!IsTemplateName); | ||||||
675 | if (TypoCorrection Corrected = | ||||||
676 | CorrectTypo(DeclarationNameInfo(II, IILoc), LookupOrdinaryName, S, SS, | ||||||
677 | CCC, CTK_ErrorRecovery)) { | ||||||
678 | // FIXME: Support error recovery for the template-name case. | ||||||
679 | bool CanRecover = !IsTemplateName; | ||||||
680 | if (Corrected.isKeyword()) { | ||||||
681 | // We corrected to a keyword. | ||||||
682 | diagnoseTypo(Corrected, | ||||||
683 | PDiag(IsTemplateName ? diag::err_no_template_suggest | ||||||
684 | : diag::err_unknown_typename_suggest) | ||||||
685 | << II); | ||||||
686 | II = Corrected.getCorrectionAsIdentifierInfo(); | ||||||
687 | } else { | ||||||
688 | // We found a similarly-named type or interface; suggest that. | ||||||
689 | if (!SS || !SS->isSet()) { | ||||||
690 | diagnoseTypo(Corrected, | ||||||
691 | PDiag(IsTemplateName ? diag::err_no_template_suggest | ||||||
692 | : diag::err_unknown_typename_suggest) | ||||||
693 | << II, CanRecover); | ||||||
694 | } else if (DeclContext *DC = computeDeclContext(*SS, false)) { | ||||||
695 | std::string CorrectedStr(Corrected.getAsString(getLangOpts())); | ||||||
696 | bool DroppedSpecifier = Corrected.WillReplaceSpecifier() && | ||||||
697 | II->getName().equals(CorrectedStr); | ||||||
698 | diagnoseTypo(Corrected, | ||||||
699 | PDiag(IsTemplateName | ||||||
700 | ? diag::err_no_member_template_suggest | ||||||
701 | : diag::err_unknown_nested_typename_suggest) | ||||||
702 | << II << DC << DroppedSpecifier << SS->getRange(), | ||||||
703 | CanRecover); | ||||||
704 | } else { | ||||||
705 | llvm_unreachable("could not have corrected a typo here")::llvm::llvm_unreachable_internal("could not have corrected a typo here" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 705); | ||||||
706 | } | ||||||
707 | |||||||
708 | if (!CanRecover) | ||||||
709 | return; | ||||||
710 | |||||||
711 | CXXScopeSpec tmpSS; | ||||||
712 | if (Corrected.getCorrectionSpecifier()) | ||||||
713 | tmpSS.MakeTrivial(Context, Corrected.getCorrectionSpecifier(), | ||||||
714 | SourceRange(IILoc)); | ||||||
715 | // FIXME: Support class template argument deduction here. | ||||||
716 | SuggestedType = | ||||||
717 | getTypeName(*Corrected.getCorrectionAsIdentifierInfo(), IILoc, S, | ||||||
718 | tmpSS.isSet() ? &tmpSS : SS, false, false, nullptr, | ||||||
719 | /*IsCtorOrDtorName=*/false, | ||||||
720 | /*WantNontrivialTypeSourceInfo=*/true); | ||||||
721 | } | ||||||
722 | return; | ||||||
723 | } | ||||||
724 | |||||||
725 | if (getLangOpts().CPlusPlus && !IsTemplateName) { | ||||||
726 | // See if II is a class template that the user forgot to pass arguments to. | ||||||
727 | UnqualifiedId Name; | ||||||
728 | Name.setIdentifier(II, IILoc); | ||||||
729 | CXXScopeSpec EmptySS; | ||||||
730 | TemplateTy TemplateResult; | ||||||
731 | bool MemberOfUnknownSpecialization; | ||||||
732 | if (isTemplateName(S, SS ? *SS : EmptySS, /*hasTemplateKeyword=*/false, | ||||||
733 | Name, nullptr, true, TemplateResult, | ||||||
734 | MemberOfUnknownSpecialization) == TNK_Type_template) { | ||||||
735 | diagnoseMissingTemplateArguments(TemplateResult.get(), IILoc); | ||||||
736 | return; | ||||||
737 | } | ||||||
738 | } | ||||||
739 | |||||||
740 | // FIXME: Should we move the logic that tries to recover from a missing tag | ||||||
741 | // (struct, union, enum) from Parser::ParseImplicitInt here, instead? | ||||||
742 | |||||||
743 | if (!SS || (!SS->isSet() && !SS->isInvalid())) | ||||||
744 | Diag(IILoc, IsTemplateName ? diag::err_no_template | ||||||
745 | : diag::err_unknown_typename) | ||||||
746 | << II; | ||||||
747 | else if (DeclContext *DC = computeDeclContext(*SS, false)) | ||||||
748 | Diag(IILoc, IsTemplateName ? diag::err_no_member_template | ||||||
749 | : diag::err_typename_nested_not_found) | ||||||
750 | << II << DC << SS->getRange(); | ||||||
751 | else if (isDependentScopeSpecifier(*SS)) { | ||||||
752 | unsigned DiagID = diag::err_typename_missing; | ||||||
753 | if (getLangOpts().MSVCCompat && isMicrosoftMissingTypename(SS, S)) | ||||||
754 | DiagID = diag::ext_typename_missing; | ||||||
755 | |||||||
756 | Diag(SS->getRange().getBegin(), DiagID) | ||||||
757 | << SS->getScopeRep() << II->getName() | ||||||
758 | << SourceRange(SS->getRange().getBegin(), IILoc) | ||||||
759 | << FixItHint::CreateInsertion(SS->getRange().getBegin(), "typename "); | ||||||
760 | SuggestedType = ActOnTypenameType(S, SourceLocation(), | ||||||
761 | *SS, *II, IILoc).get(); | ||||||
762 | } else { | ||||||
763 | assert(SS && SS->isInvalid() &&((SS && SS->isInvalid() && "Invalid scope specifier has already been diagnosed" ) ? static_cast<void> (0) : __assert_fail ("SS && SS->isInvalid() && \"Invalid scope specifier has already been diagnosed\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 764, __PRETTY_FUNCTION__)) | ||||||
764 | "Invalid scope specifier has already been diagnosed")((SS && SS->isInvalid() && "Invalid scope specifier has already been diagnosed" ) ? static_cast<void> (0) : __assert_fail ("SS && SS->isInvalid() && \"Invalid scope specifier has already been diagnosed\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 764, __PRETTY_FUNCTION__)); | ||||||
765 | } | ||||||
766 | } | ||||||
767 | |||||||
768 | /// Determine whether the given result set contains either a type name | ||||||
769 | /// or | ||||||
770 | static bool isResultTypeOrTemplate(LookupResult &R, const Token &NextToken) { | ||||||
771 | bool CheckTemplate = R.getSema().getLangOpts().CPlusPlus && | ||||||
772 | NextToken.is(tok::less); | ||||||
773 | |||||||
774 | for (LookupResult::iterator I = R.begin(), IEnd = R.end(); I != IEnd; ++I) { | ||||||
775 | if (isa<TypeDecl>(*I) || isa<ObjCInterfaceDecl>(*I)) | ||||||
776 | return true; | ||||||
777 | |||||||
778 | if (CheckTemplate && isa<TemplateDecl>(*I)) | ||||||
779 | return true; | ||||||
780 | } | ||||||
781 | |||||||
782 | return false; | ||||||
783 | } | ||||||
784 | |||||||
785 | static bool isTagTypeWithMissingTag(Sema &SemaRef, LookupResult &Result, | ||||||
786 | Scope *S, CXXScopeSpec &SS, | ||||||
787 | IdentifierInfo *&Name, | ||||||
788 | SourceLocation NameLoc) { | ||||||
789 | LookupResult R(SemaRef, Name, NameLoc, Sema::LookupTagName); | ||||||
790 | SemaRef.LookupParsedName(R, S, &SS); | ||||||
791 | if (TagDecl *Tag = R.getAsSingle<TagDecl>()) { | ||||||
792 | StringRef FixItTagName; | ||||||
793 | switch (Tag->getTagKind()) { | ||||||
794 | case TTK_Class: | ||||||
795 | FixItTagName = "class "; | ||||||
796 | break; | ||||||
797 | |||||||
798 | case TTK_Enum: | ||||||
799 | FixItTagName = "enum "; | ||||||
800 | break; | ||||||
801 | |||||||
802 | case TTK_Struct: | ||||||
803 | FixItTagName = "struct "; | ||||||
804 | break; | ||||||
805 | |||||||
806 | case TTK_Interface: | ||||||
807 | FixItTagName = "__interface "; | ||||||
808 | break; | ||||||
809 | |||||||
810 | case TTK_Union: | ||||||
811 | FixItTagName = "union "; | ||||||
812 | break; | ||||||
813 | } | ||||||
814 | |||||||
815 | StringRef TagName = FixItTagName.drop_back(); | ||||||
816 | SemaRef.Diag(NameLoc, diag::err_use_of_tag_name_without_tag) | ||||||
817 | << Name << TagName << SemaRef.getLangOpts().CPlusPlus | ||||||
818 | << FixItHint::CreateInsertion(NameLoc, FixItTagName); | ||||||
819 | |||||||
820 | for (LookupResult::iterator I = Result.begin(), IEnd = Result.end(); | ||||||
821 | I != IEnd; ++I) | ||||||
822 | SemaRef.Diag((*I)->getLocation(), diag::note_decl_hiding_tag_type) | ||||||
823 | << Name << TagName; | ||||||
824 | |||||||
825 | // Replace lookup results with just the tag decl. | ||||||
826 | Result.clear(Sema::LookupTagName); | ||||||
827 | SemaRef.LookupParsedName(Result, S, &SS); | ||||||
828 | return true; | ||||||
829 | } | ||||||
830 | |||||||
831 | return false; | ||||||
832 | } | ||||||
833 | |||||||
834 | /// Build a ParsedType for a simple-type-specifier with a nested-name-specifier. | ||||||
835 | static ParsedType buildNestedType(Sema &S, CXXScopeSpec &SS, | ||||||
836 | QualType T, SourceLocation NameLoc) { | ||||||
837 | ASTContext &Context = S.Context; | ||||||
838 | |||||||
839 | TypeLocBuilder Builder; | ||||||
840 | Builder.pushTypeSpec(T).setNameLoc(NameLoc); | ||||||
841 | |||||||
842 | T = S.getElaboratedType(ETK_None, SS, T); | ||||||
843 | ElaboratedTypeLoc ElabTL = Builder.push<ElaboratedTypeLoc>(T); | ||||||
844 | ElabTL.setElaboratedKeywordLoc(SourceLocation()); | ||||||
845 | ElabTL.setQualifierLoc(SS.getWithLocInContext(Context)); | ||||||
846 | return S.CreateParsedType(T, Builder.getTypeSourceInfo(Context, T)); | ||||||
847 | } | ||||||
848 | |||||||
849 | Sema::NameClassification Sema::ClassifyName(Scope *S, CXXScopeSpec &SS, | ||||||
850 | IdentifierInfo *&Name, | ||||||
851 | SourceLocation NameLoc, | ||||||
852 | const Token &NextToken, | ||||||
853 | CorrectionCandidateCallback *CCC) { | ||||||
854 | DeclarationNameInfo NameInfo(Name, NameLoc); | ||||||
855 | ObjCMethodDecl *CurMethod = getCurMethodDecl(); | ||||||
856 | |||||||
857 | assert(NextToken.isNot(tok::coloncolon) &&((NextToken.isNot(tok::coloncolon) && "parse nested name specifiers before calling ClassifyName" ) ? static_cast<void> (0) : __assert_fail ("NextToken.isNot(tok::coloncolon) && \"parse nested name specifiers before calling ClassifyName\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 858, __PRETTY_FUNCTION__)) | ||||||
858 | "parse nested name specifiers before calling ClassifyName")((NextToken.isNot(tok::coloncolon) && "parse nested name specifiers before calling ClassifyName" ) ? static_cast<void> (0) : __assert_fail ("NextToken.isNot(tok::coloncolon) && \"parse nested name specifiers before calling ClassifyName\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 858, __PRETTY_FUNCTION__)); | ||||||
859 | if (getLangOpts().CPlusPlus && SS.isSet() && | ||||||
860 | isCurrentClassName(*Name, S, &SS)) { | ||||||
861 | // Per [class.qual]p2, this names the constructors of SS, not the | ||||||
862 | // injected-class-name. We don't have a classification for that. | ||||||
863 | // There's not much point caching this result, since the parser | ||||||
864 | // will reject it later. | ||||||
865 | return NameClassification::Unknown(); | ||||||
866 | } | ||||||
867 | |||||||
868 | LookupResult Result(*this, Name, NameLoc, LookupOrdinaryName); | ||||||
869 | LookupParsedName(Result, S, &SS, !CurMethod); | ||||||
870 | |||||||
871 | if (SS.isInvalid()) | ||||||
872 | return NameClassification::Error(); | ||||||
873 | |||||||
874 | // For unqualified lookup in a class template in MSVC mode, look into | ||||||
875 | // dependent base classes where the primary class template is known. | ||||||
876 | if (Result.empty() && SS.isEmpty() && getLangOpts().MSVCCompat) { | ||||||
877 | if (ParsedType TypeInBase = | ||||||
878 | recoverFromTypeInKnownDependentBase(*this, *Name, NameLoc)) | ||||||
879 | return TypeInBase; | ||||||
880 | } | ||||||
881 | |||||||
882 | // Perform lookup for Objective-C instance variables (including automatically | ||||||
883 | // synthesized instance variables), if we're in an Objective-C method. | ||||||
884 | // FIXME: This lookup really, really needs to be folded in to the normal | ||||||
885 | // unqualified lookup mechanism. | ||||||
886 | if (SS.isEmpty() && CurMethod && !isResultTypeOrTemplate(Result, NextToken)) { | ||||||
887 | DeclResult Ivar = LookupIvarInObjCMethod(Result, S, Name); | ||||||
888 | if (Ivar.isInvalid()) | ||||||
889 | return NameClassification::Error(); | ||||||
890 | if (Ivar.isUsable()) | ||||||
891 | return NameClassification::NonType(cast<NamedDecl>(Ivar.get())); | ||||||
892 | |||||||
893 | // We defer builtin creation until after ivar lookup inside ObjC methods. | ||||||
894 | if (Result.empty()) | ||||||
895 | LookupBuiltin(Result); | ||||||
896 | } | ||||||
897 | |||||||
898 | bool SecondTry = false; | ||||||
899 | bool IsFilteredTemplateName = false; | ||||||
900 | |||||||
901 | Corrected: | ||||||
902 | switch (Result.getResultKind()) { | ||||||
903 | case LookupResult::NotFound: | ||||||
904 | // If an unqualified-id is followed by a '(', then we have a function | ||||||
905 | // call. | ||||||
906 | if (SS.isEmpty() && NextToken.is(tok::l_paren)) { | ||||||
907 | // In C++, this is an ADL-only call. | ||||||
908 | // FIXME: Reference? | ||||||
909 | if (getLangOpts().CPlusPlus) | ||||||
910 | return NameClassification::UndeclaredNonType(); | ||||||
911 | |||||||
912 | // C90 6.3.2.2: | ||||||
913 | // If the expression that precedes the parenthesized argument list in a | ||||||
914 | // function call consists solely of an identifier, and if no | ||||||
915 | // declaration is visible for this identifier, the identifier is | ||||||
916 | // implicitly declared exactly as if, in the innermost block containing | ||||||
917 | // the function call, the declaration | ||||||
918 | // | ||||||
919 | // extern int identifier (); | ||||||
920 | // | ||||||
921 | // appeared. | ||||||
922 | // | ||||||
923 | // We also allow this in C99 as an extension. | ||||||
924 | if (NamedDecl *D = ImplicitlyDefineFunction(NameLoc, *Name, S)) | ||||||
925 | return NameClassification::NonType(D); | ||||||
926 | } | ||||||
927 | |||||||
928 | if (getLangOpts().CPlusPlus2a && SS.isEmpty() && NextToken.is(tok::less)) { | ||||||
929 | // In C++20 onwards, this could be an ADL-only call to a function | ||||||
930 | // template, and we're required to assume that this is a template name. | ||||||
931 | // | ||||||
932 | // FIXME: Find a way to still do typo correction in this case. | ||||||
933 | TemplateName Template = | ||||||
934 | Context.getAssumedTemplateName(NameInfo.getName()); | ||||||
935 | return NameClassification::UndeclaredTemplate(Template); | ||||||
936 | } | ||||||
937 | |||||||
938 | // In C, we first see whether there is a tag type by the same name, in | ||||||
939 | // which case it's likely that the user just forgot to write "enum", | ||||||
940 | // "struct", or "union". | ||||||
941 | if (!getLangOpts().CPlusPlus && !SecondTry && | ||||||
942 | isTagTypeWithMissingTag(*this, Result, S, SS, Name, NameLoc)) { | ||||||
943 | break; | ||||||
944 | } | ||||||
945 | |||||||
946 | // Perform typo correction to determine if there is another name that is | ||||||
947 | // close to this name. | ||||||
948 | if (!SecondTry && CCC) { | ||||||
949 | SecondTry = true; | ||||||
950 | if (TypoCorrection Corrected = | ||||||
951 | CorrectTypo(Result.getLookupNameInfo(), Result.getLookupKind(), S, | ||||||
952 | &SS, *CCC, CTK_ErrorRecovery)) { | ||||||
953 | unsigned UnqualifiedDiag = diag::err_undeclared_var_use_suggest; | ||||||
954 | unsigned QualifiedDiag = diag::err_no_member_suggest; | ||||||
955 | |||||||
956 | NamedDecl *FirstDecl = Corrected.getFoundDecl(); | ||||||
957 | NamedDecl *UnderlyingFirstDecl = Corrected.getCorrectionDecl(); | ||||||
958 | if (getLangOpts().CPlusPlus && NextToken.is(tok::less) && | ||||||
959 | UnderlyingFirstDecl && isa<TemplateDecl>(UnderlyingFirstDecl)) { | ||||||
960 | UnqualifiedDiag = diag::err_no_template_suggest; | ||||||
961 | QualifiedDiag = diag::err_no_member_template_suggest; | ||||||
962 | } else if (UnderlyingFirstDecl && | ||||||
963 | (isa<TypeDecl>(UnderlyingFirstDecl) || | ||||||
964 | isa<ObjCInterfaceDecl>(UnderlyingFirstDecl) || | ||||||
965 | isa<ObjCCompatibleAliasDecl>(UnderlyingFirstDecl))) { | ||||||
966 | UnqualifiedDiag = diag::err_unknown_typename_suggest; | ||||||
967 | QualifiedDiag = diag::err_unknown_nested_typename_suggest; | ||||||
968 | } | ||||||
969 | |||||||
970 | if (SS.isEmpty()) { | ||||||
971 | diagnoseTypo(Corrected, PDiag(UnqualifiedDiag) << Name); | ||||||
972 | } else {// FIXME: is this even reachable? Test it. | ||||||
973 | std::string CorrectedStr(Corrected.getAsString(getLangOpts())); | ||||||
974 | bool DroppedSpecifier = Corrected.WillReplaceSpecifier() && | ||||||
975 | Name->getName().equals(CorrectedStr); | ||||||
976 | diagnoseTypo(Corrected, PDiag(QualifiedDiag) | ||||||
977 | << Name << computeDeclContext(SS, false) | ||||||
978 | << DroppedSpecifier << SS.getRange()); | ||||||
979 | } | ||||||
980 | |||||||
981 | // Update the name, so that the caller has the new name. | ||||||
982 | Name = Corrected.getCorrectionAsIdentifierInfo(); | ||||||
983 | |||||||
984 | // Typo correction corrected to a keyword. | ||||||
985 | if (Corrected.isKeyword()) | ||||||
986 | return Name; | ||||||
987 | |||||||
988 | // Also update the LookupResult... | ||||||
989 | // FIXME: This should probably go away at some point | ||||||
990 | Result.clear(); | ||||||
991 | Result.setLookupName(Corrected.getCorrection()); | ||||||
992 | if (FirstDecl) | ||||||
993 | Result.addDecl(FirstDecl); | ||||||
994 | |||||||
995 | // If we found an Objective-C instance variable, let | ||||||
996 | // LookupInObjCMethod build the appropriate expression to | ||||||
997 | // reference the ivar. | ||||||
998 | // FIXME: This is a gross hack. | ||||||
999 | if (ObjCIvarDecl *Ivar = Result.getAsSingle<ObjCIvarDecl>()) { | ||||||
1000 | DeclResult R = | ||||||
1001 | LookupIvarInObjCMethod(Result, S, Ivar->getIdentifier()); | ||||||
1002 | if (R.isInvalid()) | ||||||
1003 | return NameClassification::Error(); | ||||||
1004 | if (R.isUsable()) | ||||||
1005 | return NameClassification::NonType(Ivar); | ||||||
1006 | } | ||||||
1007 | |||||||
1008 | goto Corrected; | ||||||
1009 | } | ||||||
1010 | } | ||||||
1011 | |||||||
1012 | // We failed to correct; just fall through and let the parser deal with it. | ||||||
1013 | Result.suppressDiagnostics(); | ||||||
1014 | return NameClassification::Unknown(); | ||||||
1015 | |||||||
1016 | case LookupResult::NotFoundInCurrentInstantiation: { | ||||||
1017 | // We performed name lookup into the current instantiation, and there were | ||||||
1018 | // dependent bases, so we treat this result the same way as any other | ||||||
1019 | // dependent nested-name-specifier. | ||||||
1020 | |||||||
1021 | // C++ [temp.res]p2: | ||||||
1022 | // A name used in a template declaration or definition and that is | ||||||
1023 | // dependent on a template-parameter is assumed not to name a type | ||||||
1024 | // unless the applicable name lookup finds a type name or the name is | ||||||
1025 | // qualified by the keyword typename. | ||||||
1026 | // | ||||||
1027 | // FIXME: If the next token is '<', we might want to ask the parser to | ||||||
1028 | // perform some heroics to see if we actually have a | ||||||
1029 | // template-argument-list, which would indicate a missing 'template' | ||||||
1030 | // keyword here. | ||||||
1031 | return NameClassification::DependentNonType(); | ||||||
1032 | } | ||||||
1033 | |||||||
1034 | case LookupResult::Found: | ||||||
1035 | case LookupResult::FoundOverloaded: | ||||||
1036 | case LookupResult::FoundUnresolvedValue: | ||||||
1037 | break; | ||||||
1038 | |||||||
1039 | case LookupResult::Ambiguous: | ||||||
1040 | if (getLangOpts().CPlusPlus && NextToken.is(tok::less) && | ||||||
1041 | hasAnyAcceptableTemplateNames(Result, /*AllowFunctionTemplates=*/true, | ||||||
1042 | /*AllowDependent=*/false)) { | ||||||
1043 | // C++ [temp.local]p3: | ||||||
1044 | // A lookup that finds an injected-class-name (10.2) can result in an | ||||||
1045 | // ambiguity in certain cases (for example, if it is found in more than | ||||||
1046 | // one base class). If all of the injected-class-names that are found | ||||||
1047 | // refer to specializations of the same class template, and if the name | ||||||
1048 | // is followed by a template-argument-list, the reference refers to the | ||||||
1049 | // class template itself and not a specialization thereof, and is not | ||||||
1050 | // ambiguous. | ||||||
1051 | // | ||||||
1052 | // This filtering can make an ambiguous result into an unambiguous one, | ||||||
1053 | // so try again after filtering out template names. | ||||||
1054 | FilterAcceptableTemplateNames(Result); | ||||||
1055 | if (!Result.isAmbiguous()) { | ||||||
1056 | IsFilteredTemplateName = true; | ||||||
1057 | break; | ||||||
1058 | } | ||||||
1059 | } | ||||||
1060 | |||||||
1061 | // Diagnose the ambiguity and return an error. | ||||||
1062 | return NameClassification::Error(); | ||||||
1063 | } | ||||||
1064 | |||||||
1065 | if (getLangOpts().CPlusPlus && NextToken.is(tok::less) && | ||||||
1066 | (IsFilteredTemplateName || | ||||||
1067 | hasAnyAcceptableTemplateNames( | ||||||
1068 | Result, /*AllowFunctionTemplates=*/true, | ||||||
1069 | /*AllowDependent=*/false, | ||||||
1070 | /*AllowNonTemplateFunctions*/ SS.isEmpty() && | ||||||
1071 | getLangOpts().CPlusPlus2a))) { | ||||||
1072 | // C++ [temp.names]p3: | ||||||
1073 | // After name lookup (3.4) finds that a name is a template-name or that | ||||||
1074 | // an operator-function-id or a literal- operator-id refers to a set of | ||||||
1075 | // overloaded functions any member of which is a function template if | ||||||
1076 | // this is followed by a <, the < is always taken as the delimiter of a | ||||||
1077 | // template-argument-list and never as the less-than operator. | ||||||
1078 | // C++2a [temp.names]p2: | ||||||
1079 | // A name is also considered to refer to a template if it is an | ||||||
1080 | // unqualified-id followed by a < and name lookup finds either one | ||||||
1081 | // or more functions or finds nothing. | ||||||
1082 | if (!IsFilteredTemplateName) | ||||||
1083 | FilterAcceptableTemplateNames(Result); | ||||||
1084 | |||||||
1085 | bool IsFunctionTemplate; | ||||||
1086 | bool IsVarTemplate; | ||||||
1087 | TemplateName Template; | ||||||
1088 | if (Result.end() - Result.begin() > 1) { | ||||||
1089 | IsFunctionTemplate = true; | ||||||
1090 | Template = Context.getOverloadedTemplateName(Result.begin(), | ||||||
1091 | Result.end()); | ||||||
1092 | } else if (!Result.empty()) { | ||||||
1093 | auto *TD = cast<TemplateDecl>(getAsTemplateNameDecl( | ||||||
1094 | *Result.begin(), /*AllowFunctionTemplates=*/true, | ||||||
1095 | /*AllowDependent=*/false)); | ||||||
1096 | IsFunctionTemplate = isa<FunctionTemplateDecl>(TD); | ||||||
1097 | IsVarTemplate = isa<VarTemplateDecl>(TD); | ||||||
1098 | |||||||
1099 | if (SS.isNotEmpty()) | ||||||
1100 | Template = | ||||||
1101 | Context.getQualifiedTemplateName(SS.getScopeRep(), | ||||||
1102 | /*TemplateKeyword=*/false, TD); | ||||||
1103 | else | ||||||
1104 | Template = TemplateName(TD); | ||||||
1105 | } else { | ||||||
1106 | // All results were non-template functions. This is a function template | ||||||
1107 | // name. | ||||||
1108 | IsFunctionTemplate = true; | ||||||
1109 | Template = Context.getAssumedTemplateName(NameInfo.getName()); | ||||||
1110 | } | ||||||
1111 | |||||||
1112 | if (IsFunctionTemplate) { | ||||||
1113 | // Function templates always go through overload resolution, at which | ||||||
1114 | // point we'll perform the various checks (e.g., accessibility) we need | ||||||
1115 | // to based on which function we selected. | ||||||
1116 | Result.suppressDiagnostics(); | ||||||
1117 | |||||||
1118 | return NameClassification::FunctionTemplate(Template); | ||||||
1119 | } | ||||||
1120 | |||||||
1121 | return IsVarTemplate ? NameClassification::VarTemplate(Template) | ||||||
1122 | : NameClassification::TypeTemplate(Template); | ||||||
1123 | } | ||||||
1124 | |||||||
1125 | NamedDecl *FirstDecl = (*Result.begin())->getUnderlyingDecl(); | ||||||
1126 | if (TypeDecl *Type = dyn_cast<TypeDecl>(FirstDecl)) { | ||||||
1127 | DiagnoseUseOfDecl(Type, NameLoc); | ||||||
1128 | MarkAnyDeclReferenced(Type->getLocation(), Type, /*OdrUse=*/false); | ||||||
1129 | QualType T = Context.getTypeDeclType(Type); | ||||||
1130 | if (SS.isNotEmpty()) | ||||||
1131 | return buildNestedType(*this, SS, T, NameLoc); | ||||||
1132 | return ParsedType::make(T); | ||||||
1133 | } | ||||||
1134 | |||||||
1135 | ObjCInterfaceDecl *Class = dyn_cast<ObjCInterfaceDecl>(FirstDecl); | ||||||
1136 | if (!Class) { | ||||||
1137 | // FIXME: It's unfortunate that we don't have a Type node for handling this. | ||||||
1138 | if (ObjCCompatibleAliasDecl *Alias = | ||||||
1139 | dyn_cast<ObjCCompatibleAliasDecl>(FirstDecl)) | ||||||
1140 | Class = Alias->getClassInterface(); | ||||||
1141 | } | ||||||
1142 | |||||||
1143 | if (Class) { | ||||||
1144 | DiagnoseUseOfDecl(Class, NameLoc); | ||||||
1145 | |||||||
1146 | if (NextToken.is(tok::period)) { | ||||||
1147 | // Interface. <something> is parsed as a property reference expression. | ||||||
1148 | // Just return "unknown" as a fall-through for now. | ||||||
1149 | Result.suppressDiagnostics(); | ||||||
1150 | return NameClassification::Unknown(); | ||||||
1151 | } | ||||||
1152 | |||||||
1153 | QualType T = Context.getObjCInterfaceType(Class); | ||||||
1154 | return ParsedType::make(T); | ||||||
1155 | } | ||||||
1156 | |||||||
1157 | if (isa<ConceptDecl>(FirstDecl)) | ||||||
1158 | return NameClassification::Concept( | ||||||
1159 | TemplateName(cast<TemplateDecl>(FirstDecl))); | ||||||
1160 | |||||||
1161 | // We can have a type template here if we're classifying a template argument. | ||||||
1162 | if (isa<TemplateDecl>(FirstDecl) && !isa<FunctionTemplateDecl>(FirstDecl) && | ||||||
1163 | !isa<VarTemplateDecl>(FirstDecl)) | ||||||
1164 | return NameClassification::TypeTemplate( | ||||||
1165 | TemplateName(cast<TemplateDecl>(FirstDecl))); | ||||||
1166 | |||||||
1167 | // Check for a tag type hidden by a non-type decl in a few cases where it | ||||||
1168 | // seems likely a type is wanted instead of the non-type that was found. | ||||||
1169 | bool NextIsOp = NextToken.isOneOf(tok::amp, tok::star); | ||||||
1170 | if ((NextToken.is(tok::identifier) || | ||||||
1171 | (NextIsOp && | ||||||
1172 | FirstDecl->getUnderlyingDecl()->isFunctionOrFunctionTemplate())) && | ||||||
1173 | isTagTypeWithMissingTag(*this, Result, S, SS, Name, NameLoc)) { | ||||||
1174 | TypeDecl *Type = Result.getAsSingle<TypeDecl>(); | ||||||
1175 | DiagnoseUseOfDecl(Type, NameLoc); | ||||||
1176 | QualType T = Context.getTypeDeclType(Type); | ||||||
1177 | if (SS.isNotEmpty()) | ||||||
1178 | return buildNestedType(*this, SS, T, NameLoc); | ||||||
1179 | return ParsedType::make(T); | ||||||
1180 | } | ||||||
1181 | |||||||
1182 | // FIXME: This is context-dependent. We need to defer building the member | ||||||
1183 | // expression until the classification is consumed. | ||||||
1184 | if (FirstDecl->isCXXClassMember()) | ||||||
1185 | return NameClassification::ContextIndependentExpr( | ||||||
1186 | BuildPossibleImplicitMemberExpr(SS, SourceLocation(), Result, nullptr, | ||||||
1187 | S)); | ||||||
1188 | |||||||
1189 | // If we already know which single declaration is referenced, just annotate | ||||||
1190 | // that declaration directly. | ||||||
1191 | bool ADL = UseArgumentDependentLookup(SS, Result, NextToken.is(tok::l_paren)); | ||||||
1192 | if (Result.isSingleResult() && !ADL) | ||||||
1193 | return NameClassification::NonType(Result.getRepresentativeDecl()); | ||||||
1194 | |||||||
1195 | // Build an UnresolvedLookupExpr. Note that this doesn't depend on the | ||||||
1196 | // context in which we performed classification, so it's safe to do now. | ||||||
1197 | return NameClassification::ContextIndependentExpr( | ||||||
1198 | BuildDeclarationNameExpr(SS, Result, ADL)); | ||||||
1199 | } | ||||||
1200 | |||||||
1201 | ExprResult | ||||||
1202 | Sema::ActOnNameClassifiedAsUndeclaredNonType(IdentifierInfo *Name, | ||||||
1203 | SourceLocation NameLoc) { | ||||||
1204 | assert(getLangOpts().CPlusPlus && "ADL-only call in C?")((getLangOpts().CPlusPlus && "ADL-only call in C?") ? static_cast<void> (0) : __assert_fail ("getLangOpts().CPlusPlus && \"ADL-only call in C?\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 1204, __PRETTY_FUNCTION__)); | ||||||
1205 | CXXScopeSpec SS; | ||||||
1206 | LookupResult Result(*this, Name, NameLoc, LookupOrdinaryName); | ||||||
1207 | return BuildDeclarationNameExpr(SS, Result, /*ADL=*/true); | ||||||
1208 | } | ||||||
1209 | |||||||
1210 | ExprResult | ||||||
1211 | Sema::ActOnNameClassifiedAsDependentNonType(const CXXScopeSpec &SS, | ||||||
1212 | IdentifierInfo *Name, | ||||||
1213 | SourceLocation NameLoc, | ||||||
1214 | bool IsAddressOfOperand) { | ||||||
1215 | DeclarationNameInfo NameInfo(Name, NameLoc); | ||||||
1216 | return ActOnDependentIdExpression(SS, /*TemplateKWLoc=*/SourceLocation(), | ||||||
1217 | NameInfo, IsAddressOfOperand, | ||||||
1218 | /*TemplateArgs=*/nullptr); | ||||||
1219 | } | ||||||
1220 | |||||||
1221 | ExprResult Sema::ActOnNameClassifiedAsNonType(Scope *S, const CXXScopeSpec &SS, | ||||||
1222 | NamedDecl *Found, | ||||||
1223 | SourceLocation NameLoc, | ||||||
1224 | const Token &NextToken) { | ||||||
1225 | if (getCurMethodDecl() && SS.isEmpty()) | ||||||
1226 | if (auto *Ivar = dyn_cast<ObjCIvarDecl>(Found->getUnderlyingDecl())) | ||||||
1227 | return BuildIvarRefExpr(S, NameLoc, Ivar); | ||||||
1228 | |||||||
1229 | // Reconstruct the lookup result. | ||||||
1230 | LookupResult Result(*this, Found->getDeclName(), NameLoc, LookupOrdinaryName); | ||||||
1231 | Result.addDecl(Found); | ||||||
1232 | Result.resolveKind(); | ||||||
1233 | |||||||
1234 | bool ADL = UseArgumentDependentLookup(SS, Result, NextToken.is(tok::l_paren)); | ||||||
1235 | return BuildDeclarationNameExpr(SS, Result, ADL); | ||||||
1236 | } | ||||||
1237 | |||||||
1238 | Sema::TemplateNameKindForDiagnostics | ||||||
1239 | Sema::getTemplateNameKindForDiagnostics(TemplateName Name) { | ||||||
1240 | auto *TD = Name.getAsTemplateDecl(); | ||||||
1241 | if (!TD) | ||||||
1242 | return TemplateNameKindForDiagnostics::DependentTemplate; | ||||||
1243 | if (isa<ClassTemplateDecl>(TD)) | ||||||
1244 | return TemplateNameKindForDiagnostics::ClassTemplate; | ||||||
1245 | if (isa<FunctionTemplateDecl>(TD)) | ||||||
1246 | return TemplateNameKindForDiagnostics::FunctionTemplate; | ||||||
1247 | if (isa<VarTemplateDecl>(TD)) | ||||||
1248 | return TemplateNameKindForDiagnostics::VarTemplate; | ||||||
1249 | if (isa<TypeAliasTemplateDecl>(TD)) | ||||||
1250 | return TemplateNameKindForDiagnostics::AliasTemplate; | ||||||
1251 | if (isa<TemplateTemplateParmDecl>(TD)) | ||||||
1252 | return TemplateNameKindForDiagnostics::TemplateTemplateParam; | ||||||
1253 | if (isa<ConceptDecl>(TD)) | ||||||
1254 | return TemplateNameKindForDiagnostics::Concept; | ||||||
1255 | return TemplateNameKindForDiagnostics::DependentTemplate; | ||||||
1256 | } | ||||||
1257 | |||||||
1258 | // Determines the context to return to after temporarily entering a | ||||||
1259 | // context. This depends in an unnecessarily complicated way on the | ||||||
1260 | // exact ordering of callbacks from the parser. | ||||||
1261 | DeclContext *Sema::getContainingDC(DeclContext *DC) { | ||||||
1262 | |||||||
1263 | // Functions defined inline within classes aren't parsed until we've | ||||||
1264 | // finished parsing the top-level class, so the top-level class is | ||||||
1265 | // the context we'll need to return to. | ||||||
1266 | // A Lambda call operator whose parent is a class must not be treated | ||||||
1267 | // as an inline member function. A Lambda can be used legally | ||||||
1268 | // either as an in-class member initializer or a default argument. These | ||||||
1269 | // are parsed once the class has been marked complete and so the containing | ||||||
1270 | // context would be the nested class (when the lambda is defined in one); | ||||||
1271 | // If the class is not complete, then the lambda is being used in an | ||||||
1272 | // ill-formed fashion (such as to specify the width of a bit-field, or | ||||||
1273 | // in an array-bound) - in which case we still want to return the | ||||||
1274 | // lexically containing DC (which could be a nested class). | ||||||
1275 | if (isa<FunctionDecl>(DC) && !isLambdaCallOperator(DC)) { | ||||||
1276 | DC = DC->getLexicalParent(); | ||||||
1277 | |||||||
1278 | // A function not defined within a class will always return to its | ||||||
1279 | // lexical context. | ||||||
1280 | if (!isa<CXXRecordDecl>(DC)) | ||||||
1281 | return DC; | ||||||
1282 | |||||||
1283 | // A C++ inline method/friend is parsed *after* the topmost class | ||||||
1284 | // it was declared in is fully parsed ("complete"); the topmost | ||||||
1285 | // class is the context we need to return to. | ||||||
1286 | while (CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(DC->getLexicalParent())) | ||||||
1287 | DC = RD; | ||||||
1288 | |||||||
1289 | // Return the declaration context of the topmost class the inline method is | ||||||
1290 | // declared in. | ||||||
1291 | return DC; | ||||||
1292 | } | ||||||
1293 | |||||||
1294 | return DC->getLexicalParent(); | ||||||
1295 | } | ||||||
1296 | |||||||
1297 | void Sema::PushDeclContext(Scope *S, DeclContext *DC) { | ||||||
1298 | assert(getContainingDC(DC) == CurContext &&((getContainingDC(DC) == CurContext && "The next DeclContext should be lexically contained in the current one." ) ? static_cast<void> (0) : __assert_fail ("getContainingDC(DC) == CurContext && \"The next DeclContext should be lexically contained in the current one.\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 1299, __PRETTY_FUNCTION__)) | ||||||
1299 | "The next DeclContext should be lexically contained in the current one.")((getContainingDC(DC) == CurContext && "The next DeclContext should be lexically contained in the current one." ) ? static_cast<void> (0) : __assert_fail ("getContainingDC(DC) == CurContext && \"The next DeclContext should be lexically contained in the current one.\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 1299, __PRETTY_FUNCTION__)); | ||||||
1300 | CurContext = DC; | ||||||
1301 | S->setEntity(DC); | ||||||
1302 | } | ||||||
1303 | |||||||
1304 | void Sema::PopDeclContext() { | ||||||
1305 | assert(CurContext && "DeclContext imbalance!")((CurContext && "DeclContext imbalance!") ? static_cast <void> (0) : __assert_fail ("CurContext && \"DeclContext imbalance!\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 1305, __PRETTY_FUNCTION__)); | ||||||
1306 | |||||||
1307 | CurContext = getContainingDC(CurContext); | ||||||
1308 | assert(CurContext && "Popped translation unit!")((CurContext && "Popped translation unit!") ? static_cast <void> (0) : __assert_fail ("CurContext && \"Popped translation unit!\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 1308, __PRETTY_FUNCTION__)); | ||||||
1309 | } | ||||||
1310 | |||||||
1311 | Sema::SkippedDefinitionContext Sema::ActOnTagStartSkippedDefinition(Scope *S, | ||||||
1312 | Decl *D) { | ||||||
1313 | // Unlike PushDeclContext, the context to which we return is not necessarily | ||||||
1314 | // the containing DC of TD, because the new context will be some pre-existing | ||||||
1315 | // TagDecl definition instead of a fresh one. | ||||||
1316 | auto Result = static_cast<SkippedDefinitionContext>(CurContext); | ||||||
1317 | CurContext = cast<TagDecl>(D)->getDefinition(); | ||||||
1318 | assert(CurContext && "skipping definition of undefined tag")((CurContext && "skipping definition of undefined tag" ) ? static_cast<void> (0) : __assert_fail ("CurContext && \"skipping definition of undefined tag\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 1318, __PRETTY_FUNCTION__)); | ||||||
1319 | // Start lookups from the parent of the current context; we don't want to look | ||||||
1320 | // into the pre-existing complete definition. | ||||||
1321 | S->setEntity(CurContext->getLookupParent()); | ||||||
1322 | return Result; | ||||||
1323 | } | ||||||
1324 | |||||||
1325 | void Sema::ActOnTagFinishSkippedDefinition(SkippedDefinitionContext Context) { | ||||||
1326 | CurContext = static_cast<decltype(CurContext)>(Context); | ||||||
1327 | } | ||||||
1328 | |||||||
1329 | /// EnterDeclaratorContext - Used when we must lookup names in the context | ||||||
1330 | /// of a declarator's nested name specifier. | ||||||
1331 | /// | ||||||
1332 | void Sema::EnterDeclaratorContext(Scope *S, DeclContext *DC) { | ||||||
1333 | // C++0x [basic.lookup.unqual]p13: | ||||||
1334 | // A name used in the definition of a static data member of class | ||||||
1335 | // X (after the qualified-id of the static member) is looked up as | ||||||
1336 | // if the name was used in a member function of X. | ||||||
1337 | // C++0x [basic.lookup.unqual]p14: | ||||||
1338 | // If a variable member of a namespace is defined outside of the | ||||||
1339 | // scope of its namespace then any name used in the definition of | ||||||
1340 | // the variable member (after the declarator-id) is looked up as | ||||||
1341 | // if the definition of the variable member occurred in its | ||||||
1342 | // namespace. | ||||||
1343 | // Both of these imply that we should push a scope whose context | ||||||
1344 | // is the semantic context of the declaration. We can't use | ||||||
1345 | // PushDeclContext here because that context is not necessarily | ||||||
1346 | // lexically contained in the current context. Fortunately, | ||||||
1347 | // the containing scope should have the appropriate information. | ||||||
1348 | |||||||
1349 | assert(!S->getEntity() && "scope already has entity")((!S->getEntity() && "scope already has entity") ? static_cast<void> (0) : __assert_fail ("!S->getEntity() && \"scope already has entity\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 1349, __PRETTY_FUNCTION__)); | ||||||
1350 | |||||||
1351 | #ifndef NDEBUG | ||||||
1352 | Scope *Ancestor = S->getParent(); | ||||||
1353 | while (!Ancestor->getEntity()) Ancestor = Ancestor->getParent(); | ||||||
1354 | assert(Ancestor->getEntity() == CurContext && "ancestor context mismatch")((Ancestor->getEntity() == CurContext && "ancestor context mismatch" ) ? static_cast<void> (0) : __assert_fail ("Ancestor->getEntity() == CurContext && \"ancestor context mismatch\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 1354, __PRETTY_FUNCTION__)); | ||||||
1355 | #endif | ||||||
1356 | |||||||
1357 | CurContext = DC; | ||||||
1358 | S->setEntity(DC); | ||||||
1359 | } | ||||||
1360 | |||||||
1361 | void Sema::ExitDeclaratorContext(Scope *S) { | ||||||
1362 | assert(S->getEntity() == CurContext && "Context imbalance!")((S->getEntity() == CurContext && "Context imbalance!" ) ? static_cast<void> (0) : __assert_fail ("S->getEntity() == CurContext && \"Context imbalance!\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 1362, __PRETTY_FUNCTION__)); | ||||||
1363 | |||||||
1364 | // Switch back to the lexical context. The safety of this is | ||||||
1365 | // enforced by an assert in EnterDeclaratorContext. | ||||||
1366 | Scope *Ancestor = S->getParent(); | ||||||
1367 | while (!Ancestor->getEntity()) Ancestor = Ancestor->getParent(); | ||||||
1368 | CurContext = Ancestor->getEntity(); | ||||||
1369 | |||||||
1370 | // We don't need to do anything with the scope, which is going to | ||||||
1371 | // disappear. | ||||||
1372 | } | ||||||
1373 | |||||||
1374 | void Sema::ActOnReenterFunctionContext(Scope* S, Decl *D) { | ||||||
1375 | // We assume that the caller has already called | ||||||
1376 | // ActOnReenterTemplateScope so getTemplatedDecl() works. | ||||||
1377 | FunctionDecl *FD = D->getAsFunction(); | ||||||
1378 | if (!FD) | ||||||
1379 | return; | ||||||
1380 | |||||||
1381 | // Same implementation as PushDeclContext, but enters the context | ||||||
1382 | // from the lexical parent, rather than the top-level class. | ||||||
1383 | assert(CurContext == FD->getLexicalParent() &&((CurContext == FD->getLexicalParent() && "The next DeclContext should be lexically contained in the current one." ) ? static_cast<void> (0) : __assert_fail ("CurContext == FD->getLexicalParent() && \"The next DeclContext should be lexically contained in the current one.\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 1384, __PRETTY_FUNCTION__)) | ||||||
1384 | "The next DeclContext should be lexically contained in the current one.")((CurContext == FD->getLexicalParent() && "The next DeclContext should be lexically contained in the current one." ) ? static_cast<void> (0) : __assert_fail ("CurContext == FD->getLexicalParent() && \"The next DeclContext should be lexically contained in the current one.\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 1384, __PRETTY_FUNCTION__)); | ||||||
1385 | CurContext = FD; | ||||||
1386 | S->setEntity(CurContext); | ||||||
1387 | |||||||
1388 | for (unsigned P = 0, NumParams = FD->getNumParams(); P < NumParams; ++P) { | ||||||
1389 | ParmVarDecl *Param = FD->getParamDecl(P); | ||||||
1390 | // If the parameter has an identifier, then add it to the scope | ||||||
1391 | if (Param->getIdentifier()) { | ||||||
1392 | S->AddDecl(Param); | ||||||
1393 | IdResolver.AddDecl(Param); | ||||||
1394 | } | ||||||
1395 | } | ||||||
1396 | } | ||||||
1397 | |||||||
1398 | void Sema::ActOnExitFunctionContext() { | ||||||
1399 | // Same implementation as PopDeclContext, but returns to the lexical parent, | ||||||
1400 | // rather than the top-level class. | ||||||
1401 | assert(CurContext && "DeclContext imbalance!")((CurContext && "DeclContext imbalance!") ? static_cast <void> (0) : __assert_fail ("CurContext && \"DeclContext imbalance!\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 1401, __PRETTY_FUNCTION__)); | ||||||
1402 | CurContext = CurContext->getLexicalParent(); | ||||||
1403 | assert(CurContext && "Popped translation unit!")((CurContext && "Popped translation unit!") ? static_cast <void> (0) : __assert_fail ("CurContext && \"Popped translation unit!\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 1403, __PRETTY_FUNCTION__)); | ||||||
1404 | } | ||||||
1405 | |||||||
1406 | /// Determine whether we allow overloading of the function | ||||||
1407 | /// PrevDecl with another declaration. | ||||||
1408 | /// | ||||||
1409 | /// This routine determines whether overloading is possible, not | ||||||
1410 | /// whether some new function is actually an overload. It will return | ||||||
1411 | /// true in C++ (where we can always provide overloads) or, as an | ||||||
1412 | /// extension, in C when the previous function is already an | ||||||
1413 | /// overloaded function declaration or has the "overloadable" | ||||||
1414 | /// attribute. | ||||||
1415 | static bool AllowOverloadingOfFunction(LookupResult &Previous, | ||||||
1416 | ASTContext &Context, | ||||||
1417 | const FunctionDecl *New) { | ||||||
1418 | if (Context.getLangOpts().CPlusPlus) | ||||||
1419 | return true; | ||||||
1420 | |||||||
1421 | if (Previous.getResultKind() == LookupResult::FoundOverloaded) | ||||||
1422 | return true; | ||||||
1423 | |||||||
1424 | return Previous.getResultKind() == LookupResult::Found && | ||||||
1425 | (Previous.getFoundDecl()->hasAttr<OverloadableAttr>() || | ||||||
1426 | New->hasAttr<OverloadableAttr>()); | ||||||
1427 | } | ||||||
1428 | |||||||
1429 | /// Add this decl to the scope shadowed decl chains. | ||||||
1430 | void Sema::PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext) { | ||||||
1431 | // Move up the scope chain until we find the nearest enclosing | ||||||
1432 | // non-transparent context. The declaration will be introduced into this | ||||||
1433 | // scope. | ||||||
1434 | while (S->getEntity() && S->getEntity()->isTransparentContext()) | ||||||
1435 | S = S->getParent(); | ||||||
1436 | |||||||
1437 | // Add scoped declarations into their context, so that they can be | ||||||
1438 | // found later. Declarations without a context won't be inserted | ||||||
1439 | // into any context. | ||||||
1440 | if (AddToContext) | ||||||
1441 | CurContext->addDecl(D); | ||||||
1442 | |||||||
1443 | // Out-of-line definitions shouldn't be pushed into scope in C++, unless they | ||||||
1444 | // are function-local declarations. | ||||||
1445 | if (getLangOpts().CPlusPlus && D->isOutOfLine() && | ||||||
1446 | !D->getDeclContext()->getRedeclContext()->Equals( | ||||||
1447 | D->getLexicalDeclContext()->getRedeclContext()) && | ||||||
1448 | !D->getLexicalDeclContext()->isFunctionOrMethod()) | ||||||
1449 | return; | ||||||
1450 | |||||||
1451 | // Template instantiations should also not be pushed into scope. | ||||||
1452 | if (isa<FunctionDecl>(D) && | ||||||
1453 | cast<FunctionDecl>(D)->isFunctionTemplateSpecialization()) | ||||||
1454 | return; | ||||||
1455 | |||||||
1456 | // If this replaces anything in the current scope, | ||||||
1457 | IdentifierResolver::iterator I = IdResolver.begin(D->getDeclName()), | ||||||
1458 | IEnd = IdResolver.end(); | ||||||
1459 | for (; I != IEnd; ++I) { | ||||||
1460 | if (S->isDeclScope(*I) && D->declarationReplaces(*I)) { | ||||||
1461 | S->RemoveDecl(*I); | ||||||
1462 | IdResolver.RemoveDecl(*I); | ||||||
1463 | |||||||
1464 | // Should only need to replace one decl. | ||||||
1465 | break; | ||||||
1466 | } | ||||||
1467 | } | ||||||
1468 | |||||||
1469 | S->AddDecl(D); | ||||||
1470 | |||||||
1471 | if (isa<LabelDecl>(D) && !cast<LabelDecl>(D)->isGnuLocal()) { | ||||||
1472 | // Implicitly-generated labels may end up getting generated in an order that | ||||||
1473 | // isn't strictly lexical, which breaks name lookup. Be careful to insert | ||||||
1474 | // the label at the appropriate place in the identifier chain. | ||||||
1475 | for (I = IdResolver.begin(D->getDeclName()); I != IEnd; ++I) { | ||||||
1476 | DeclContext *IDC = (*I)->getLexicalDeclContext()->getRedeclContext(); | ||||||
1477 | if (IDC == CurContext) { | ||||||
1478 | if (!S->isDeclScope(*I)) | ||||||
1479 | continue; | ||||||
1480 | } else if (IDC->Encloses(CurContext)) | ||||||
1481 | break; | ||||||
1482 | } | ||||||
1483 | |||||||
1484 | IdResolver.InsertDeclAfter(I, D); | ||||||
1485 | } else { | ||||||
1486 | IdResolver.AddDecl(D); | ||||||
1487 | } | ||||||
1488 | } | ||||||
1489 | |||||||
1490 | bool Sema::isDeclInScope(NamedDecl *D, DeclContext *Ctx, Scope *S, | ||||||
1491 | bool AllowInlineNamespace) { | ||||||
1492 | return IdResolver.isDeclInScope(D, Ctx, S, AllowInlineNamespace); | ||||||
1493 | } | ||||||
1494 | |||||||
1495 | Scope *Sema::getScopeForDeclContext(Scope *S, DeclContext *DC) { | ||||||
1496 | DeclContext *TargetDC = DC->getPrimaryContext(); | ||||||
1497 | do { | ||||||
1498 | if (DeclContext *ScopeDC = S->getEntity()) | ||||||
1499 | if (ScopeDC->getPrimaryContext() == TargetDC) | ||||||
1500 | return S; | ||||||
1501 | } while ((S = S->getParent())); | ||||||
1502 | |||||||
1503 | return nullptr; | ||||||
1504 | } | ||||||
1505 | |||||||
1506 | static bool isOutOfScopePreviousDeclaration(NamedDecl *, | ||||||
1507 | DeclContext*, | ||||||
1508 | ASTContext&); | ||||||
1509 | |||||||
1510 | /// Filters out lookup results that don't fall within the given scope | ||||||
1511 | /// as determined by isDeclInScope. | ||||||
1512 | void Sema::FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S, | ||||||
1513 | bool ConsiderLinkage, | ||||||
1514 | bool AllowInlineNamespace) { | ||||||
1515 | LookupResult::Filter F = R.makeFilter(); | ||||||
1516 | while (F.hasNext()) { | ||||||
1517 | NamedDecl *D = F.next(); | ||||||
1518 | |||||||
1519 | if (isDeclInScope(D, Ctx, S, AllowInlineNamespace)) | ||||||
1520 | continue; | ||||||
1521 | |||||||
1522 | if (ConsiderLinkage && isOutOfScopePreviousDeclaration(D, Ctx, Context)) | ||||||
1523 | continue; | ||||||
1524 | |||||||
1525 | F.erase(); | ||||||
1526 | } | ||||||
1527 | |||||||
1528 | F.done(); | ||||||
1529 | } | ||||||
1530 | |||||||
1531 | /// We've determined that \p New is a redeclaration of \p Old. Check that they | ||||||
1532 | /// have compatible owning modules. | ||||||
1533 | bool Sema::CheckRedeclarationModuleOwnership(NamedDecl *New, NamedDecl *Old) { | ||||||
1534 | // FIXME: The Modules TS is not clear about how friend declarations are | ||||||
1535 | // to be treated. It's not meaningful to have different owning modules for | ||||||
1536 | // linkage in redeclarations of the same entity, so for now allow the | ||||||
1537 | // redeclaration and change the owning modules to match. | ||||||
1538 | if (New->getFriendObjectKind() && | ||||||
1539 | Old->getOwningModuleForLinkage() != New->getOwningModuleForLinkage()) { | ||||||
1540 | New->setLocalOwningModule(Old->getOwningModule()); | ||||||
1541 | makeMergedDefinitionVisible(New); | ||||||
1542 | return false; | ||||||
1543 | } | ||||||
1544 | |||||||
1545 | Module *NewM = New->getOwningModule(); | ||||||
1546 | Module *OldM = Old->getOwningModule(); | ||||||
1547 | |||||||
1548 | if (NewM && NewM->Kind == Module::PrivateModuleFragment) | ||||||
1549 | NewM = NewM->Parent; | ||||||
1550 | if (OldM && OldM->Kind == Module::PrivateModuleFragment) | ||||||
1551 | OldM = OldM->Parent; | ||||||
1552 | |||||||
1553 | if (NewM == OldM) | ||||||
1554 | return false; | ||||||
1555 | |||||||
1556 | bool NewIsModuleInterface = NewM && NewM->isModulePurview(); | ||||||
1557 | bool OldIsModuleInterface = OldM && OldM->isModulePurview(); | ||||||
1558 | if (NewIsModuleInterface || OldIsModuleInterface) { | ||||||
1559 | // C++ Modules TS [basic.def.odr] 6.2/6.7 [sic]: | ||||||
1560 | // if a declaration of D [...] appears in the purview of a module, all | ||||||
1561 | // other such declarations shall appear in the purview of the same module | ||||||
1562 | Diag(New->getLocation(), diag::err_mismatched_owning_module) | ||||||
1563 | << New | ||||||
1564 | << NewIsModuleInterface | ||||||
1565 | << (NewIsModuleInterface ? NewM->getFullModuleName() : "") | ||||||
1566 | << OldIsModuleInterface | ||||||
1567 | << (OldIsModuleInterface ? OldM->getFullModuleName() : ""); | ||||||
1568 | Diag(Old->getLocation(), diag::note_previous_declaration); | ||||||
1569 | New->setInvalidDecl(); | ||||||
1570 | return true; | ||||||
1571 | } | ||||||
1572 | |||||||
1573 | return false; | ||||||
1574 | } | ||||||
1575 | |||||||
1576 | static bool isUsingDecl(NamedDecl *D) { | ||||||
1577 | return isa<UsingShadowDecl>(D) || | ||||||
1578 | isa<UnresolvedUsingTypenameDecl>(D) || | ||||||
1579 | isa<UnresolvedUsingValueDecl>(D); | ||||||
1580 | } | ||||||
1581 | |||||||
1582 | /// Removes using shadow declarations from the lookup results. | ||||||
1583 | static void RemoveUsingDecls(LookupResult &R) { | ||||||
1584 | LookupResult::Filter F = R.makeFilter(); | ||||||
1585 | while (F.hasNext()) | ||||||
1586 | if (isUsingDecl(F.next())) | ||||||
1587 | F.erase(); | ||||||
1588 | |||||||
1589 | F.done(); | ||||||
1590 | } | ||||||
1591 | |||||||
1592 | /// Check for this common pattern: | ||||||
1593 | /// @code | ||||||
1594 | /// class S { | ||||||
1595 | /// S(const S&); // DO NOT IMPLEMENT | ||||||
1596 | /// void operator=(const S&); // DO NOT IMPLEMENT | ||||||
1597 | /// }; | ||||||
1598 | /// @endcode | ||||||
1599 | static bool IsDisallowedCopyOrAssign(const CXXMethodDecl *D) { | ||||||
1600 | // FIXME: Should check for private access too but access is set after we get | ||||||
1601 | // the decl here. | ||||||
1602 | if (D->doesThisDeclarationHaveABody()) | ||||||
1603 | return false; | ||||||
1604 | |||||||
1605 | if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(D)) | ||||||
1606 | return CD->isCopyConstructor(); | ||||||
1607 | return D->isCopyAssignmentOperator(); | ||||||
1608 | } | ||||||
1609 | |||||||
1610 | // We need this to handle | ||||||
1611 | // | ||||||
1612 | // typedef struct { | ||||||
1613 | // void *foo() { return 0; } | ||||||
1614 | // } A; | ||||||
1615 | // | ||||||
1616 | // When we see foo we don't know if after the typedef we will get 'A' or '*A' | ||||||
1617 | // for example. If 'A', foo will have external linkage. If we have '*A', | ||||||
1618 | // foo will have no linkage. Since we can't know until we get to the end | ||||||
1619 | // of the typedef, this function finds out if D might have non-external linkage. | ||||||
1620 | // Callers should verify at the end of the TU if it D has external linkage or | ||||||
1621 | // not. | ||||||
1622 | bool Sema::mightHaveNonExternalLinkage(const DeclaratorDecl *D) { | ||||||
1623 | const DeclContext *DC = D->getDeclContext(); | ||||||
1624 | while (!DC->isTranslationUnit()) { | ||||||
1625 | if (const RecordDecl *RD = dyn_cast<RecordDecl>(DC)){ | ||||||
1626 | if (!RD->hasNameForLinkage()) | ||||||
1627 | return true; | ||||||
1628 | } | ||||||
1629 | DC = DC->getParent(); | ||||||
1630 | } | ||||||
1631 | |||||||
1632 | return !D->isExternallyVisible(); | ||||||
1633 | } | ||||||
1634 | |||||||
1635 | // FIXME: This needs to be refactored; some other isInMainFile users want | ||||||
1636 | // these semantics. | ||||||
1637 | static bool isMainFileLoc(const Sema &S, SourceLocation Loc) { | ||||||
1638 | if (S.TUKind != TU_Complete) | ||||||
1639 | return false; | ||||||
1640 | return S.SourceMgr.isInMainFile(Loc); | ||||||
1641 | } | ||||||
1642 | |||||||
1643 | bool Sema::ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const { | ||||||
1644 | assert(D)((D) ? static_cast<void> (0) : __assert_fail ("D", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 1644, __PRETTY_FUNCTION__)); | ||||||
1645 | |||||||
1646 | if (D->isInvalidDecl() || D->isUsed() || D->hasAttr<UnusedAttr>()) | ||||||
1647 | return false; | ||||||
1648 | |||||||
1649 | // Ignore all entities declared within templates, and out-of-line definitions | ||||||
1650 | // of members of class templates. | ||||||
1651 | if (D->getDeclContext()->isDependentContext() || | ||||||
1652 | D->getLexicalDeclContext()->isDependentContext()) | ||||||
1653 | return false; | ||||||
1654 | |||||||
1655 | if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { | ||||||
1656 | if (FD->getTemplateSpecializationKind() == TSK_ImplicitInstantiation) | ||||||
1657 | return false; | ||||||
1658 | // A non-out-of-line declaration of a member specialization was implicitly | ||||||
1659 | // instantiated; it's the out-of-line declaration that we're interested in. | ||||||
1660 | if (FD->getTemplateSpecializationKind() == TSK_ExplicitSpecialization && | ||||||
1661 | FD->getMemberSpecializationInfo() && !FD->isOutOfLine()) | ||||||
1662 | return false; | ||||||
1663 | |||||||
1664 | if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { | ||||||
1665 | if (MD->isVirtual() || IsDisallowedCopyOrAssign(MD)) | ||||||
1666 | return false; | ||||||
1667 | } else { | ||||||
1668 | // 'static inline' functions are defined in headers; don't warn. | ||||||
1669 | if (FD->isInlined() && !isMainFileLoc(*this, FD->getLocation())) | ||||||
1670 | return false; | ||||||
1671 | } | ||||||
1672 | |||||||
1673 | if (FD->doesThisDeclarationHaveABody() && | ||||||
1674 | Context.DeclMustBeEmitted(FD)) | ||||||
1675 | return false; | ||||||
1676 | } else if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { | ||||||
1677 | // Constants and utility variables are defined in headers with internal | ||||||
1678 | // linkage; don't warn. (Unlike functions, there isn't a convenient marker | ||||||
1679 | // like "inline".) | ||||||
1680 | if (!isMainFileLoc(*this, VD->getLocation())) | ||||||
1681 | return false; | ||||||
1682 | |||||||
1683 | if (Context.DeclMustBeEmitted(VD)) | ||||||
1684 | return false; | ||||||
1685 | |||||||
1686 | if (VD->isStaticDataMember() && | ||||||
1687 | VD->getTemplateSpecializationKind() == TSK_ImplicitInstantiation) | ||||||
1688 | return false; | ||||||
1689 | if (VD->isStaticDataMember() && | ||||||
1690 | VD->getTemplateSpecializationKind() == TSK_ExplicitSpecialization && | ||||||
1691 | VD->getMemberSpecializationInfo() && !VD->isOutOfLine()) | ||||||
1692 | return false; | ||||||
1693 | |||||||
1694 | if (VD->isInline() && !isMainFileLoc(*this, VD->getLocation())) | ||||||
1695 | return false; | ||||||
1696 | } else { | ||||||
1697 | return false; | ||||||
1698 | } | ||||||
1699 | |||||||
1700 | // Only warn for unused decls internal to the translation unit. | ||||||
1701 | // FIXME: This seems like a bogus check; it suppresses -Wunused-function | ||||||
1702 | // for inline functions defined in the main source file, for instance. | ||||||
1703 | return mightHaveNonExternalLinkage(D); | ||||||
1704 | } | ||||||
1705 | |||||||
1706 | void Sema::MarkUnusedFileScopedDecl(const DeclaratorDecl *D) { | ||||||
1707 | if (!D) | ||||||
1708 | return; | ||||||
1709 | |||||||
1710 | if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { | ||||||
1711 | const FunctionDecl *First = FD->getFirstDecl(); | ||||||
1712 | if (FD != First && ShouldWarnIfUnusedFileScopedDecl(First)) | ||||||
1713 | return; // First should already be in the vector. | ||||||
1714 | } | ||||||
1715 | |||||||
1716 | if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { | ||||||
1717 | const VarDecl *First = VD->getFirstDecl(); | ||||||
1718 | if (VD != First && ShouldWarnIfUnusedFileScopedDecl(First)) | ||||||
1719 | return; // First should already be in the vector. | ||||||
1720 | } | ||||||
1721 | |||||||
1722 | if (ShouldWarnIfUnusedFileScopedDecl(D)) | ||||||
1723 | UnusedFileScopedDecls.push_back(D); | ||||||
1724 | } | ||||||
1725 | |||||||
1726 | static bool ShouldDiagnoseUnusedDecl(const NamedDecl *D) { | ||||||
1727 | if (D->isInvalidDecl()) | ||||||
1728 | return false; | ||||||
1729 | |||||||
1730 | bool Referenced = false; | ||||||
1731 | if (auto *DD = dyn_cast<DecompositionDecl>(D)) { | ||||||
1732 | // For a decomposition declaration, warn if none of the bindings are | ||||||
1733 | // referenced, instead of if the variable itself is referenced (which | ||||||
1734 | // it is, by the bindings' expressions). | ||||||
1735 | for (auto *BD : DD->bindings()) { | ||||||
1736 | if (BD->isReferenced()) { | ||||||
1737 | Referenced = true; | ||||||
1738 | break; | ||||||
1739 | } | ||||||
1740 | } | ||||||
1741 | } else if (!D->getDeclName()) { | ||||||
1742 | return false; | ||||||
1743 | } else if (D->isReferenced() || D->isUsed()) { | ||||||
1744 | Referenced = true; | ||||||
1745 | } | ||||||
1746 | |||||||
1747 | if (Referenced || D->hasAttr<UnusedAttr>() || | ||||||
1748 | D->hasAttr<ObjCPreciseLifetimeAttr>()) | ||||||
1749 | return false; | ||||||
1750 | |||||||
1751 | if (isa<LabelDecl>(D)) | ||||||
1752 | return true; | ||||||
1753 | |||||||
1754 | // Except for labels, we only care about unused decls that are local to | ||||||
1755 | // functions. | ||||||
1756 | bool WithinFunction = D->getDeclContext()->isFunctionOrMethod(); | ||||||
1757 | if (const auto *R = dyn_cast<CXXRecordDecl>(D->getDeclContext())) | ||||||
1758 | // For dependent types, the diagnostic is deferred. | ||||||
1759 | WithinFunction = | ||||||
1760 | WithinFunction || (R->isLocalClass() && !R->isDependentType()); | ||||||
1761 | if (!WithinFunction) | ||||||
1762 | return false; | ||||||
1763 | |||||||
1764 | if (isa<TypedefNameDecl>(D)) | ||||||
1765 | return true; | ||||||
1766 | |||||||
1767 | // White-list anything that isn't a local variable. | ||||||
1768 | if (!isa<VarDecl>(D) || isa<ParmVarDecl>(D) || isa<ImplicitParamDecl>(D)) | ||||||
1769 | return false; | ||||||
1770 | |||||||
1771 | // Types of valid local variables should be complete, so this should succeed. | ||||||
1772 | if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { | ||||||
1773 | |||||||
1774 | // White-list anything with an __attribute__((unused)) type. | ||||||
1775 | const auto *Ty = VD->getType().getTypePtr(); | ||||||
1776 | |||||||
1777 | // Only look at the outermost level of typedef. | ||||||
1778 | if (const TypedefType *TT = Ty->getAs<TypedefType>()) { | ||||||
1779 | if (TT->getDecl()->hasAttr<UnusedAttr>()) | ||||||
1780 | return false; | ||||||
1781 | } | ||||||
1782 | |||||||
1783 | // If we failed to complete the type for some reason, or if the type is | ||||||
1784 | // dependent, don't diagnose the variable. | ||||||
1785 | if (Ty->isIncompleteType() || Ty->isDependentType()) | ||||||
1786 | return false; | ||||||
1787 | |||||||
1788 | // Look at the element type to ensure that the warning behaviour is | ||||||
1789 | // consistent for both scalars and arrays. | ||||||
1790 | Ty = Ty->getBaseElementTypeUnsafe(); | ||||||
1791 | |||||||
1792 | if (const TagType *TT = Ty->getAs<TagType>()) { | ||||||
1793 | const TagDecl *Tag = TT->getDecl(); | ||||||
1794 | if (Tag->hasAttr<UnusedAttr>()) | ||||||
1795 | return false; | ||||||
1796 | |||||||
1797 | if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(Tag)) { | ||||||
1798 | if (!RD->hasTrivialDestructor() && !RD->hasAttr<WarnUnusedAttr>()) | ||||||
1799 | return false; | ||||||
1800 | |||||||
1801 | if (const Expr *Init = VD->getInit()) { | ||||||
1802 | if (const ExprWithCleanups *Cleanups = | ||||||
1803 | dyn_cast<ExprWithCleanups>(Init)) | ||||||
1804 | Init = Cleanups->getSubExpr(); | ||||||
1805 | const CXXConstructExpr *Construct = | ||||||
1806 | dyn_cast<CXXConstructExpr>(Init); | ||||||
1807 | if (Construct && !Construct->isElidable()) { | ||||||
1808 | CXXConstructorDecl *CD = Construct->getConstructor(); | ||||||
1809 | if (!CD->isTrivial() && !RD->hasAttr<WarnUnusedAttr>() && | ||||||
1810 | (VD->getInit()->isValueDependent() || !VD->evaluateValue())) | ||||||
1811 | return false; | ||||||
1812 | } | ||||||
1813 | |||||||
1814 | // Suppress the warning if we don't know how this is constructed, and | ||||||
1815 | // it could possibly be non-trivial constructor. | ||||||
1816 | if (Init->isTypeDependent()) | ||||||
1817 | for (const CXXConstructorDecl *Ctor : RD->ctors()) | ||||||
1818 | if (!Ctor->isTrivial()) | ||||||
1819 | return false; | ||||||
1820 | } | ||||||
1821 | } | ||||||
1822 | } | ||||||
1823 | |||||||
1824 | // TODO: __attribute__((unused)) templates? | ||||||
1825 | } | ||||||
1826 | |||||||
1827 | return true; | ||||||
1828 | } | ||||||
1829 | |||||||
1830 | static void GenerateFixForUnusedDecl(const NamedDecl *D, ASTContext &Ctx, | ||||||
1831 | FixItHint &Hint) { | ||||||
1832 | if (isa<LabelDecl>(D)) { | ||||||
1833 | SourceLocation AfterColon = Lexer::findLocationAfterToken( | ||||||
1834 | D->getEndLoc(), tok::colon, Ctx.getSourceManager(), Ctx.getLangOpts(), | ||||||
1835 | true); | ||||||
1836 | if (AfterColon.isInvalid()) | ||||||
1837 | return; | ||||||
1838 | Hint = FixItHint::CreateRemoval( | ||||||
1839 | CharSourceRange::getCharRange(D->getBeginLoc(), AfterColon)); | ||||||
1840 | } | ||||||
1841 | } | ||||||
1842 | |||||||
1843 | void Sema::DiagnoseUnusedNestedTypedefs(const RecordDecl *D) { | ||||||
1844 | if (D->getTypeForDecl()->isDependentType()) | ||||||
1845 | return; | ||||||
1846 | |||||||
1847 | for (auto *TmpD : D->decls()) { | ||||||
1848 | if (const auto *T = dyn_cast<TypedefNameDecl>(TmpD)) | ||||||
1849 | DiagnoseUnusedDecl(T); | ||||||
1850 | else if(const auto *R = dyn_cast<RecordDecl>(TmpD)) | ||||||
1851 | DiagnoseUnusedNestedTypedefs(R); | ||||||
1852 | } | ||||||
1853 | } | ||||||
1854 | |||||||
1855 | /// DiagnoseUnusedDecl - Emit warnings about declarations that are not used | ||||||
1856 | /// unless they are marked attr(unused). | ||||||
1857 | void Sema::DiagnoseUnusedDecl(const NamedDecl *D) { | ||||||
1858 | if (!ShouldDiagnoseUnusedDecl(D)) | ||||||
1859 | return; | ||||||
1860 | |||||||
1861 | if (auto *TD = dyn_cast<TypedefNameDecl>(D)) { | ||||||
1862 | // typedefs can be referenced later on, so the diagnostics are emitted | ||||||
1863 | // at end-of-translation-unit. | ||||||
1864 | UnusedLocalTypedefNameCandidates.insert(TD); | ||||||
1865 | return; | ||||||
1866 | } | ||||||
1867 | |||||||
1868 | FixItHint Hint; | ||||||
1869 | GenerateFixForUnusedDecl(D, Context, Hint); | ||||||
1870 | |||||||
1871 | unsigned DiagID; | ||||||
1872 | if (isa<VarDecl>(D) && cast<VarDecl>(D)->isExceptionVariable()) | ||||||
1873 | DiagID = diag::warn_unused_exception_param; | ||||||
1874 | else if (isa<LabelDecl>(D)) | ||||||
1875 | DiagID = diag::warn_unused_label; | ||||||
1876 | else | ||||||
1877 | DiagID = diag::warn_unused_variable; | ||||||
1878 | |||||||
1879 | Diag(D->getLocation(), DiagID) << D << Hint; | ||||||
1880 | } | ||||||
1881 | |||||||
1882 | static void CheckPoppedLabel(LabelDecl *L, Sema &S) { | ||||||
1883 | // Verify that we have no forward references left. If so, there was a goto | ||||||
1884 | // or address of a label taken, but no definition of it. Label fwd | ||||||
1885 | // definitions are indicated with a null substmt which is also not a resolved | ||||||
1886 | // MS inline assembly label name. | ||||||
1887 | bool Diagnose = false; | ||||||
1888 | if (L->isMSAsmLabel()) | ||||||
1889 | Diagnose = !L->isResolvedMSAsmLabel(); | ||||||
1890 | else | ||||||
1891 | Diagnose = L->getStmt() == nullptr; | ||||||
1892 | if (Diagnose) | ||||||
1893 | S.Diag(L->getLocation(), diag::err_undeclared_label_use) <<L->getDeclName(); | ||||||
1894 | } | ||||||
1895 | |||||||
1896 | void Sema::ActOnPopScope(SourceLocation Loc, Scope *S) { | ||||||
1897 | S->mergeNRVOIntoParent(); | ||||||
1898 | |||||||
1899 | if (S->decl_empty()) return; | ||||||
1900 | assert((S->getFlags() & (Scope::DeclScope | Scope::TemplateParamScope)) &&(((S->getFlags() & (Scope::DeclScope | Scope::TemplateParamScope )) && "Scope shouldn't contain decls!") ? static_cast <void> (0) : __assert_fail ("(S->getFlags() & (Scope::DeclScope | Scope::TemplateParamScope)) && \"Scope shouldn't contain decls!\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 1901, __PRETTY_FUNCTION__)) | ||||||
1901 | "Scope shouldn't contain decls!")(((S->getFlags() & (Scope::DeclScope | Scope::TemplateParamScope )) && "Scope shouldn't contain decls!") ? static_cast <void> (0) : __assert_fail ("(S->getFlags() & (Scope::DeclScope | Scope::TemplateParamScope)) && \"Scope shouldn't contain decls!\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 1901, __PRETTY_FUNCTION__)); | ||||||
1902 | |||||||
1903 | for (auto *TmpD : S->decls()) { | ||||||
1904 | assert(TmpD && "This decl didn't get pushed??")((TmpD && "This decl didn't get pushed??") ? static_cast <void> (0) : __assert_fail ("TmpD && \"This decl didn't get pushed??\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 1904, __PRETTY_FUNCTION__)); | ||||||
1905 | |||||||
1906 | assert(isa<NamedDecl>(TmpD) && "Decl isn't NamedDecl?")((isa<NamedDecl>(TmpD) && "Decl isn't NamedDecl?" ) ? static_cast<void> (0) : __assert_fail ("isa<NamedDecl>(TmpD) && \"Decl isn't NamedDecl?\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 1906, __PRETTY_FUNCTION__)); | ||||||
1907 | NamedDecl *D = cast<NamedDecl>(TmpD); | ||||||
1908 | |||||||
1909 | // Diagnose unused variables in this scope. | ||||||
1910 | if (!S->hasUnrecoverableErrorOccurred()) { | ||||||
1911 | DiagnoseUnusedDecl(D); | ||||||
1912 | if (const auto *RD = dyn_cast<RecordDecl>(D)) | ||||||
1913 | DiagnoseUnusedNestedTypedefs(RD); | ||||||
1914 | } | ||||||
1915 | |||||||
1916 | if (!D->getDeclName()) continue; | ||||||
1917 | |||||||
1918 | // If this was a forward reference to a label, verify it was defined. | ||||||
1919 | if (LabelDecl *LD = dyn_cast<LabelDecl>(D)) | ||||||
1920 | CheckPoppedLabel(LD, *this); | ||||||
1921 | |||||||
1922 | // Remove this name from our lexical scope, and warn on it if we haven't | ||||||
1923 | // already. | ||||||
1924 | IdResolver.RemoveDecl(D); | ||||||
1925 | auto ShadowI = ShadowingDecls.find(D); | ||||||
1926 | if (ShadowI != ShadowingDecls.end()) { | ||||||
1927 | if (const auto *FD = dyn_cast<FieldDecl>(ShadowI->second)) { | ||||||
1928 | Diag(D->getLocation(), diag::warn_ctor_parm_shadows_field) | ||||||
1929 | << D << FD << FD->getParent(); | ||||||
1930 | Diag(FD->getLocation(), diag::note_previous_declaration); | ||||||
1931 | } | ||||||
1932 | ShadowingDecls.erase(ShadowI); | ||||||
1933 | } | ||||||
1934 | } | ||||||
1935 | } | ||||||
1936 | |||||||
1937 | /// Look for an Objective-C class in the translation unit. | ||||||
1938 | /// | ||||||
1939 | /// \param Id The name of the Objective-C class we're looking for. If | ||||||
1940 | /// typo-correction fixes this name, the Id will be updated | ||||||
1941 | /// to the fixed name. | ||||||
1942 | /// | ||||||
1943 | /// \param IdLoc The location of the name in the translation unit. | ||||||
1944 | /// | ||||||
1945 | /// \param DoTypoCorrection If true, this routine will attempt typo correction | ||||||
1946 | /// if there is no class with the given name. | ||||||
1947 | /// | ||||||
1948 | /// \returns The declaration of the named Objective-C class, or NULL if the | ||||||
1949 | /// class could not be found. | ||||||
1950 | ObjCInterfaceDecl *Sema::getObjCInterfaceDecl(IdentifierInfo *&Id, | ||||||
1951 | SourceLocation IdLoc, | ||||||
1952 | bool DoTypoCorrection) { | ||||||
1953 | // The third "scope" argument is 0 since we aren't enabling lazy built-in | ||||||
1954 | // creation from this context. | ||||||
1955 | NamedDecl *IDecl = LookupSingleName(TUScope, Id, IdLoc, LookupOrdinaryName); | ||||||
1956 | |||||||
1957 | if (!IDecl && DoTypoCorrection) { | ||||||
1958 | // Perform typo correction at the given location, but only if we | ||||||
1959 | // find an Objective-C class name. | ||||||
1960 | DeclFilterCCC<ObjCInterfaceDecl> CCC{}; | ||||||
1961 | if (TypoCorrection C = | ||||||
1962 | CorrectTypo(DeclarationNameInfo(Id, IdLoc), LookupOrdinaryName, | ||||||
1963 | TUScope, nullptr, CCC, CTK_ErrorRecovery)) { | ||||||
1964 | diagnoseTypo(C, PDiag(diag::err_undef_interface_suggest) << Id); | ||||||
1965 | IDecl = C.getCorrectionDeclAs<ObjCInterfaceDecl>(); | ||||||
1966 | Id = IDecl->getIdentifier(); | ||||||
1967 | } | ||||||
1968 | } | ||||||
1969 | ObjCInterfaceDecl *Def = dyn_cast_or_null<ObjCInterfaceDecl>(IDecl); | ||||||
1970 | // This routine must always return a class definition, if any. | ||||||
1971 | if (Def && Def->getDefinition()) | ||||||
1972 | Def = Def->getDefinition(); | ||||||
1973 | return Def; | ||||||
1974 | } | ||||||
1975 | |||||||
1976 | /// getNonFieldDeclScope - Retrieves the innermost scope, starting | ||||||
1977 | /// from S, where a non-field would be declared. This routine copes | ||||||
1978 | /// with the difference between C and C++ scoping rules in structs and | ||||||
1979 | /// unions. For example, the following code is well-formed in C but | ||||||
1980 | /// ill-formed in C++: | ||||||
1981 | /// @code | ||||||
1982 | /// struct S6 { | ||||||
1983 | /// enum { BAR } e; | ||||||
1984 | /// }; | ||||||
1985 | /// | ||||||
1986 | /// void test_S6() { | ||||||
1987 | /// struct S6 a; | ||||||
1988 | /// a.e = BAR; | ||||||
1989 | /// } | ||||||
1990 | /// @endcode | ||||||
1991 | /// For the declaration of BAR, this routine will return a different | ||||||
1992 | /// scope. The scope S will be the scope of the unnamed enumeration | ||||||
1993 | /// within S6. In C++, this routine will return the scope associated | ||||||
1994 | /// with S6, because the enumeration's scope is a transparent | ||||||
1995 | /// context but structures can contain non-field names. In C, this | ||||||
1996 | /// routine will return the translation unit scope, since the | ||||||
1997 | /// enumeration's scope is a transparent context and structures cannot | ||||||
1998 | /// contain non-field names. | ||||||
1999 | Scope *Sema::getNonFieldDeclScope(Scope *S) { | ||||||
2000 | while (((S->getFlags() & Scope::DeclScope) == 0) || | ||||||
2001 | (S->getEntity() && S->getEntity()->isTransparentContext()) || | ||||||
2002 | (S->isClassScope() && !getLangOpts().CPlusPlus)) | ||||||
2003 | S = S->getParent(); | ||||||
2004 | return S; | ||||||
2005 | } | ||||||
2006 | |||||||
2007 | /// Looks up the declaration of "struct objc_super" and | ||||||
2008 | /// saves it for later use in building builtin declaration of | ||||||
2009 | /// objc_msgSendSuper and objc_msgSendSuper_stret. If no such | ||||||
2010 | /// pre-existing declaration exists no action takes place. | ||||||
2011 | static void LookupPredefedObjCSuperType(Sema &ThisSema, Scope *S, | ||||||
2012 | IdentifierInfo *II) { | ||||||
2013 | if (!II->isStr("objc_msgSendSuper")) | ||||||
2014 | return; | ||||||
2015 | ASTContext &Context = ThisSema.Context; | ||||||
2016 | |||||||
2017 | LookupResult Result(ThisSema, &Context.Idents.get("objc_super"), | ||||||
2018 | SourceLocation(), Sema::LookupTagName); | ||||||
2019 | ThisSema.LookupName(Result, S); | ||||||
2020 | if (Result.getResultKind() == LookupResult::Found) | ||||||
2021 | if (const TagDecl *TD = Result.getAsSingle<TagDecl>()) | ||||||
2022 | Context.setObjCSuperType(Context.getTagDeclType(TD)); | ||||||
2023 | } | ||||||
2024 | |||||||
2025 | static StringRef getHeaderName(Builtin::Context &BuiltinInfo, unsigned ID, | ||||||
2026 | ASTContext::GetBuiltinTypeError Error) { | ||||||
2027 | switch (Error) { | ||||||
2028 | case ASTContext::GE_None: | ||||||
2029 | return ""; | ||||||
2030 | case ASTContext::GE_Missing_type: | ||||||
2031 | return BuiltinInfo.getHeaderName(ID); | ||||||
2032 | case ASTContext::GE_Missing_stdio: | ||||||
2033 | return "stdio.h"; | ||||||
2034 | case ASTContext::GE_Missing_setjmp: | ||||||
2035 | return "setjmp.h"; | ||||||
2036 | case ASTContext::GE_Missing_ucontext: | ||||||
2037 | return "ucontext.h"; | ||||||
2038 | } | ||||||
2039 | llvm_unreachable("unhandled error kind")::llvm::llvm_unreachable_internal("unhandled error kind", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 2039); | ||||||
2040 | } | ||||||
2041 | |||||||
2042 | /// LazilyCreateBuiltin - The specified Builtin-ID was first used at | ||||||
2043 | /// file scope. lazily create a decl for it. ForRedeclaration is true | ||||||
2044 | /// if we're creating this built-in in anticipation of redeclaring the | ||||||
2045 | /// built-in. | ||||||
2046 | NamedDecl *Sema::LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, | ||||||
2047 | Scope *S, bool ForRedeclaration, | ||||||
2048 | SourceLocation Loc) { | ||||||
2049 | LookupPredefedObjCSuperType(*this, S, II); | ||||||
2050 | |||||||
2051 | ASTContext::GetBuiltinTypeError Error; | ||||||
2052 | QualType R = Context.GetBuiltinType(ID, Error); | ||||||
2053 | if (Error) { | ||||||
2054 | if (!ForRedeclaration) | ||||||
2055 | return nullptr; | ||||||
2056 | |||||||
2057 | // If we have a builtin without an associated type we should not emit a | ||||||
2058 | // warning when we were not able to find a type for it. | ||||||
2059 | if (Error == ASTContext::GE_Missing_type) | ||||||
2060 | return nullptr; | ||||||
2061 | |||||||
2062 | // If we could not find a type for setjmp it is because the jmp_buf type was | ||||||
2063 | // not defined prior to the setjmp declaration. | ||||||
2064 | if (Error == ASTContext::GE_Missing_setjmp) { | ||||||
2065 | Diag(Loc, diag::warn_implicit_decl_no_jmp_buf) | ||||||
2066 | << Context.BuiltinInfo.getName(ID); | ||||||
2067 | return nullptr; | ||||||
2068 | } | ||||||
2069 | |||||||
2070 | // Generally, we emit a warning that the declaration requires the | ||||||
2071 | // appropriate header. | ||||||
2072 | Diag(Loc, diag::warn_implicit_decl_requires_sysheader) | ||||||
2073 | << getHeaderName(Context.BuiltinInfo, ID, Error) | ||||||
2074 | << Context.BuiltinInfo.getName(ID); | ||||||
2075 | return nullptr; | ||||||
2076 | } | ||||||
2077 | |||||||
2078 | if (!ForRedeclaration && | ||||||
2079 | (Context.BuiltinInfo.isPredefinedLibFunction(ID) || | ||||||
2080 | Context.BuiltinInfo.isHeaderDependentFunction(ID))) { | ||||||
2081 | Diag(Loc, diag::ext_implicit_lib_function_decl) | ||||||
2082 | << Context.BuiltinInfo.getName(ID) << R; | ||||||
2083 | if (Context.BuiltinInfo.getHeaderName(ID) && | ||||||
2084 | !Diags.isIgnored(diag::ext_implicit_lib_function_decl, Loc)) | ||||||
2085 | Diag(Loc, diag::note_include_header_or_declare) | ||||||
2086 | << Context.BuiltinInfo.getHeaderName(ID) | ||||||
2087 | << Context.BuiltinInfo.getName(ID); | ||||||
2088 | } | ||||||
2089 | |||||||
2090 | if (R.isNull()) | ||||||
2091 | return nullptr; | ||||||
2092 | |||||||
2093 | DeclContext *Parent = Context.getTranslationUnitDecl(); | ||||||
2094 | if (getLangOpts().CPlusPlus) { | ||||||
2095 | LinkageSpecDecl *CLinkageDecl = | ||||||
2096 | LinkageSpecDecl::Create(Context, Parent, Loc, Loc, | ||||||
2097 | LinkageSpecDecl::lang_c, false); | ||||||
2098 | CLinkageDecl->setImplicit(); | ||||||
2099 | Parent->addDecl(CLinkageDecl); | ||||||
2100 | Parent = CLinkageDecl; | ||||||
2101 | } | ||||||
2102 | |||||||
2103 | FunctionDecl *New = FunctionDecl::Create(Context, | ||||||
2104 | Parent, | ||||||
2105 | Loc, Loc, II, R, /*TInfo=*/nullptr, | ||||||
2106 | SC_Extern, | ||||||
2107 | false, | ||||||
2108 | R->isFunctionProtoType()); | ||||||
2109 | New->setImplicit(); | ||||||
2110 | |||||||
2111 | // Create Decl objects for each parameter, adding them to the | ||||||
2112 | // FunctionDecl. | ||||||
2113 | if (const FunctionProtoType *FT = dyn_cast<FunctionProtoType>(R)) { | ||||||
2114 | SmallVector<ParmVarDecl*, 16> Params; | ||||||
2115 | for (unsigned i = 0, e = FT->getNumParams(); i != e; ++i) { | ||||||
2116 | ParmVarDecl *parm = | ||||||
2117 | ParmVarDecl::Create(Context, New, SourceLocation(), SourceLocation(), | ||||||
2118 | nullptr, FT->getParamType(i), /*TInfo=*/nullptr, | ||||||
2119 | SC_None, nullptr); | ||||||
2120 | parm->setScopeInfo(0, i); | ||||||
2121 | Params.push_back(parm); | ||||||
2122 | } | ||||||
2123 | New->setParams(Params); | ||||||
2124 | } | ||||||
2125 | |||||||
2126 | AddKnownFunctionAttributes(New); | ||||||
2127 | RegisterLocallyScopedExternCDecl(New, S); | ||||||
2128 | |||||||
2129 | // TUScope is the translation-unit scope to insert this function into. | ||||||
2130 | // FIXME: This is hideous. We need to teach PushOnScopeChains to | ||||||
2131 | // relate Scopes to DeclContexts, and probably eliminate CurContext | ||||||
2132 | // entirely, but we're not there yet. | ||||||
2133 | DeclContext *SavedContext = CurContext; | ||||||
2134 | CurContext = Parent; | ||||||
2135 | PushOnScopeChains(New, TUScope); | ||||||
2136 | CurContext = SavedContext; | ||||||
2137 | return New; | ||||||
2138 | } | ||||||
2139 | |||||||
2140 | /// Typedef declarations don't have linkage, but they still denote the same | ||||||
2141 | /// entity if their types are the same. | ||||||
2142 | /// FIXME: This is notionally doing the same thing as ASTReaderDecl's | ||||||
2143 | /// isSameEntity. | ||||||
2144 | static void filterNonConflictingPreviousTypedefDecls(Sema &S, | ||||||
2145 | TypedefNameDecl *Decl, | ||||||
2146 | LookupResult &Previous) { | ||||||
2147 | // This is only interesting when modules are enabled. | ||||||
2148 | if (!S.getLangOpts().Modules && !S.getLangOpts().ModulesLocalVisibility) | ||||||
2149 | return; | ||||||
2150 | |||||||
2151 | // Empty sets are uninteresting. | ||||||
2152 | if (Previous.empty()) | ||||||
2153 | return; | ||||||
2154 | |||||||
2155 | LookupResult::Filter Filter = Previous.makeFilter(); | ||||||
2156 | while (Filter.hasNext()) { | ||||||
2157 | NamedDecl *Old = Filter.next(); | ||||||
2158 | |||||||
2159 | // Non-hidden declarations are never ignored. | ||||||
2160 | if (S.isVisible(Old)) | ||||||
2161 | continue; | ||||||
2162 | |||||||
2163 | // Declarations of the same entity are not ignored, even if they have | ||||||
2164 | // different linkages. | ||||||
2165 | if (auto *OldTD = dyn_cast<TypedefNameDecl>(Old)) { | ||||||
2166 | if (S.Context.hasSameType(OldTD->getUnderlyingType(), | ||||||
2167 | Decl->getUnderlyingType())) | ||||||
2168 | continue; | ||||||
2169 | |||||||
2170 | // If both declarations give a tag declaration a typedef name for linkage | ||||||
2171 | // purposes, then they declare the same entity. | ||||||
2172 | if (OldTD->getAnonDeclWithTypedefName(/*AnyRedecl*/true) && | ||||||
2173 | Decl->getAnonDeclWithTypedefName()) | ||||||
2174 | continue; | ||||||
2175 | } | ||||||
2176 | |||||||
2177 | Filter.erase(); | ||||||
2178 | } | ||||||
2179 | |||||||
2180 | Filter.done(); | ||||||
2181 | } | ||||||
2182 | |||||||
2183 | bool Sema::isIncompatibleTypedef(TypeDecl *Old, TypedefNameDecl *New) { | ||||||
2184 | QualType OldType; | ||||||
2185 | if (TypedefNameDecl *OldTypedef = dyn_cast<TypedefNameDecl>(Old)) | ||||||
2186 | OldType = OldTypedef->getUnderlyingType(); | ||||||
2187 | else | ||||||
2188 | OldType = Context.getTypeDeclType(Old); | ||||||
2189 | QualType NewType = New->getUnderlyingType(); | ||||||
2190 | |||||||
2191 | if (NewType->isVariablyModifiedType()) { | ||||||
2192 | // Must not redefine a typedef with a variably-modified type. | ||||||
2193 | int Kind = isa<TypeAliasDecl>(Old) ? 1 : 0; | ||||||
2194 | Diag(New->getLocation(), diag::err_redefinition_variably_modified_typedef) | ||||||
2195 | << Kind << NewType; | ||||||
2196 | if (Old->getLocation().isValid()) | ||||||
2197 | notePreviousDefinition(Old, New->getLocation()); | ||||||
2198 | New->setInvalidDecl(); | ||||||
2199 | return true; | ||||||
2200 | } | ||||||
2201 | |||||||
2202 | if (OldType != NewType && | ||||||
2203 | !OldType->isDependentType() && | ||||||
2204 | !NewType->isDependentType() && | ||||||
2205 | !Context.hasSameType(OldType, NewType)) { | ||||||
2206 | int Kind = isa<TypeAliasDecl>(Old) ? 1 : 0; | ||||||
2207 | Diag(New->getLocation(), diag::err_redefinition_different_typedef) | ||||||
2208 | << Kind << NewType << OldType; | ||||||
2209 | if (Old->getLocation().isValid()) | ||||||
2210 | notePreviousDefinition(Old, New->getLocation()); | ||||||
2211 | New->setInvalidDecl(); | ||||||
2212 | return true; | ||||||
2213 | } | ||||||
2214 | return false; | ||||||
2215 | } | ||||||
2216 | |||||||
2217 | /// MergeTypedefNameDecl - We just parsed a typedef 'New' which has the | ||||||
2218 | /// same name and scope as a previous declaration 'Old'. Figure out | ||||||
2219 | /// how to resolve this situation, merging decls or emitting | ||||||
2220 | /// diagnostics as appropriate. If there was an error, set New to be invalid. | ||||||
2221 | /// | ||||||
2222 | void Sema::MergeTypedefNameDecl(Scope *S, TypedefNameDecl *New, | ||||||
2223 | LookupResult &OldDecls) { | ||||||
2224 | // If the new decl is known invalid already, don't bother doing any | ||||||
2225 | // merging checks. | ||||||
2226 | if (New->isInvalidDecl()) return; | ||||||
2227 | |||||||
2228 | // Allow multiple definitions for ObjC built-in typedefs. | ||||||
2229 | // FIXME: Verify the underlying types are equivalent! | ||||||
2230 | if (getLangOpts().ObjC) { | ||||||
2231 | const IdentifierInfo *TypeID = New->getIdentifier(); | ||||||
2232 | switch (TypeID->getLength()) { | ||||||
2233 | default: break; | ||||||
2234 | case 2: | ||||||
2235 | { | ||||||
2236 | if (!TypeID->isStr("id")) | ||||||
2237 | break; | ||||||
2238 | QualType T = New->getUnderlyingType(); | ||||||
2239 | if (!T->isPointerType()) | ||||||
2240 | break; | ||||||
2241 | if (!T->isVoidPointerType()) { | ||||||
2242 | QualType PT = T->castAs<PointerType>()->getPointeeType(); | ||||||
2243 | if (!PT->isStructureType()) | ||||||
2244 | break; | ||||||
2245 | } | ||||||
2246 | Context.setObjCIdRedefinitionType(T); | ||||||
2247 | // Install the built-in type for 'id', ignoring the current definition. | ||||||
2248 | New->setTypeForDecl(Context.getObjCIdType().getTypePtr()); | ||||||
2249 | return; | ||||||
2250 | } | ||||||
2251 | case 5: | ||||||
2252 | if (!TypeID->isStr("Class")) | ||||||
2253 | break; | ||||||
2254 | Context.setObjCClassRedefinitionType(New->getUnderlyingType()); | ||||||
2255 | // Install the built-in type for 'Class', ignoring the current definition. | ||||||
2256 | New->setTypeForDecl(Context.getObjCClassType().getTypePtr()); | ||||||
2257 | return; | ||||||
2258 | case 3: | ||||||
2259 | if (!TypeID->isStr("SEL")) | ||||||
2260 | break; | ||||||
2261 | Context.setObjCSelRedefinitionType(New->getUnderlyingType()); | ||||||
2262 | // Install the built-in type for 'SEL', ignoring the current definition. | ||||||
2263 | New->setTypeForDecl(Context.getObjCSelType().getTypePtr()); | ||||||
2264 | return; | ||||||
2265 | } | ||||||
2266 | // Fall through - the typedef name was not a builtin type. | ||||||
2267 | } | ||||||
2268 | |||||||
2269 | // Verify the old decl was also a type. | ||||||
2270 | TypeDecl *Old = OldDecls.getAsSingle<TypeDecl>(); | ||||||
2271 | if (!Old) { | ||||||
2272 | Diag(New->getLocation(), diag::err_redefinition_different_kind) | ||||||
2273 | << New->getDeclName(); | ||||||
2274 | |||||||
2275 | NamedDecl *OldD = OldDecls.getRepresentativeDecl(); | ||||||
2276 | if (OldD->getLocation().isValid()) | ||||||
2277 | notePreviousDefinition(OldD, New->getLocation()); | ||||||
2278 | |||||||
2279 | return New->setInvalidDecl(); | ||||||
2280 | } | ||||||
2281 | |||||||
2282 | // If the old declaration is invalid, just give up here. | ||||||
2283 | if (Old->isInvalidDecl()) | ||||||
2284 | return New->setInvalidDecl(); | ||||||
2285 | |||||||
2286 | if (auto *OldTD = dyn_cast<TypedefNameDecl>(Old)) { | ||||||
2287 | auto *OldTag = OldTD->getAnonDeclWithTypedefName(/*AnyRedecl*/true); | ||||||
2288 | auto *NewTag = New->getAnonDeclWithTypedefName(); | ||||||
2289 | NamedDecl *Hidden = nullptr; | ||||||
2290 | if (OldTag && NewTag && | ||||||
2291 | OldTag->getCanonicalDecl() != NewTag->getCanonicalDecl() && | ||||||
2292 | !hasVisibleDefinition(OldTag, &Hidden)) { | ||||||
2293 | // There is a definition of this tag, but it is not visible. Use it | ||||||
2294 | // instead of our tag. | ||||||
2295 | New->setTypeForDecl(OldTD->getTypeForDecl()); | ||||||
2296 | if (OldTD->isModed()) | ||||||
2297 | New->setModedTypeSourceInfo(OldTD->getTypeSourceInfo(), | ||||||
2298 | OldTD->getUnderlyingType()); | ||||||
2299 | else | ||||||
2300 | New->setTypeSourceInfo(OldTD->getTypeSourceInfo()); | ||||||
2301 | |||||||
2302 | // Make the old tag definition visible. | ||||||
2303 | makeMergedDefinitionVisible(Hidden); | ||||||
2304 | |||||||
2305 | // If this was an unscoped enumeration, yank all of its enumerators | ||||||
2306 | // out of the scope. | ||||||
2307 | if (isa<EnumDecl>(NewTag)) { | ||||||
2308 | Scope *EnumScope = getNonFieldDeclScope(S); | ||||||
2309 | for (auto *D : NewTag->decls()) { | ||||||
2310 | auto *ED = cast<EnumConstantDecl>(D); | ||||||
2311 | assert(EnumScope->isDeclScope(ED))((EnumScope->isDeclScope(ED)) ? static_cast<void> (0 ) : __assert_fail ("EnumScope->isDeclScope(ED)", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 2311, __PRETTY_FUNCTION__)); | ||||||
2312 | EnumScope->RemoveDecl(ED); | ||||||
2313 | IdResolver.RemoveDecl(ED); | ||||||
2314 | ED->getLexicalDeclContext()->removeDecl(ED); | ||||||
2315 | } | ||||||
2316 | } | ||||||
2317 | } | ||||||
2318 | } | ||||||
2319 | |||||||
2320 | // If the typedef types are not identical, reject them in all languages and | ||||||
2321 | // with any extensions enabled. | ||||||
2322 | if (isIncompatibleTypedef(Old, New)) | ||||||
2323 | return; | ||||||
2324 | |||||||
2325 | // The types match. Link up the redeclaration chain and merge attributes if | ||||||
2326 | // the old declaration was a typedef. | ||||||
2327 | if (TypedefNameDecl *Typedef = dyn_cast<TypedefNameDecl>(Old)) { | ||||||
2328 | New->setPreviousDecl(Typedef); | ||||||
2329 | mergeDeclAttributes(New, Old); | ||||||
2330 | } | ||||||
2331 | |||||||
2332 | if (getLangOpts().MicrosoftExt) | ||||||
2333 | return; | ||||||
2334 | |||||||
2335 | if (getLangOpts().CPlusPlus) { | ||||||
2336 | // C++ [dcl.typedef]p2: | ||||||
2337 | // In a given non-class scope, a typedef specifier can be used to | ||||||
2338 | // redefine the name of any type declared in that scope to refer | ||||||
2339 | // to the type to which it already refers. | ||||||
2340 | if (!isa<CXXRecordDecl>(CurContext)) | ||||||
2341 | return; | ||||||
2342 | |||||||
2343 | // C++0x [dcl.typedef]p4: | ||||||
2344 | // In a given class scope, a typedef specifier can be used to redefine | ||||||
2345 | // any class-name declared in that scope that is not also a typedef-name | ||||||
2346 | // to refer to the type to which it already refers. | ||||||
2347 | // | ||||||
2348 | // This wording came in via DR424, which was a correction to the | ||||||
2349 | // wording in DR56, which accidentally banned code like: | ||||||
2350 | // | ||||||
2351 | // struct S { | ||||||
2352 | // typedef struct A { } A; | ||||||
2353 | // }; | ||||||
2354 | // | ||||||
2355 | // in the C++03 standard. We implement the C++0x semantics, which | ||||||
2356 | // allow the above but disallow | ||||||
2357 | // | ||||||
2358 | // struct S { | ||||||
2359 | // typedef int I; | ||||||
2360 | // typedef int I; | ||||||
2361 | // }; | ||||||
2362 | // | ||||||
2363 | // since that was the intent of DR56. | ||||||
2364 | if (!isa<TypedefNameDecl>(Old)) | ||||||
2365 | return; | ||||||
2366 | |||||||
2367 | Diag(New->getLocation(), diag::err_redefinition) | ||||||
2368 | << New->getDeclName(); | ||||||
2369 | notePreviousDefinition(Old, New->getLocation()); | ||||||
2370 | return New->setInvalidDecl(); | ||||||
2371 | } | ||||||
2372 | |||||||
2373 | // Modules always permit redefinition of typedefs, as does C11. | ||||||
2374 | if (getLangOpts().Modules || getLangOpts().C11) | ||||||
2375 | return; | ||||||
2376 | |||||||
2377 | // If we have a redefinition of a typedef in C, emit a warning. This warning | ||||||
2378 | // is normally mapped to an error, but can be controlled with | ||||||
2379 | // -Wtypedef-redefinition. If either the original or the redefinition is | ||||||
2380 | // in a system header, don't emit this for compatibility with GCC. | ||||||
2381 | if (getDiagnostics().getSuppressSystemWarnings() && | ||||||
2382 | // Some standard types are defined implicitly in Clang (e.g. OpenCL). | ||||||
2383 | (Old->isImplicit() || | ||||||
2384 | Context.getSourceManager().isInSystemHeader(Old->getLocation()) || | ||||||
2385 | Context.getSourceManager().isInSystemHeader(New->getLocation()))) | ||||||
2386 | return; | ||||||
2387 | |||||||
2388 | Diag(New->getLocation(), diag::ext_redefinition_of_typedef) | ||||||
2389 | << New->getDeclName(); | ||||||
2390 | notePreviousDefinition(Old, New->getLocation()); | ||||||
2391 | } | ||||||
2392 | |||||||
2393 | /// DeclhasAttr - returns true if decl Declaration already has the target | ||||||
2394 | /// attribute. | ||||||
2395 | static bool DeclHasAttr(const Decl *D, const Attr *A) { | ||||||
2396 | const OwnershipAttr *OA = dyn_cast<OwnershipAttr>(A); | ||||||
2397 | const AnnotateAttr *Ann = dyn_cast<AnnotateAttr>(A); | ||||||
2398 | for (const auto *i : D->attrs()) | ||||||
2399 | if (i->getKind() == A->getKind()) { | ||||||
2400 | if (Ann) { | ||||||
2401 | if (Ann->getAnnotation() == cast<AnnotateAttr>(i)->getAnnotation()) | ||||||
2402 | return true; | ||||||
2403 | continue; | ||||||
2404 | } | ||||||
2405 | // FIXME: Don't hardcode this check | ||||||
2406 | if (OA && isa<OwnershipAttr>(i)) | ||||||
2407 | return OA->getOwnKind() == cast<OwnershipAttr>(i)->getOwnKind(); | ||||||
2408 | return true; | ||||||
2409 | } | ||||||
2410 | |||||||
2411 | return false; | ||||||
2412 | } | ||||||
2413 | |||||||
2414 | static bool isAttributeTargetADefinition(Decl *D) { | ||||||
2415 | if (VarDecl *VD = dyn_cast<VarDecl>(D)) | ||||||
2416 | return VD->isThisDeclarationADefinition(); | ||||||
2417 | if (TagDecl *TD = dyn_cast<TagDecl>(D)) | ||||||
2418 | return TD->isCompleteDefinition() || TD->isBeingDefined(); | ||||||
2419 | return true; | ||||||
2420 | } | ||||||
2421 | |||||||
2422 | /// Merge alignment attributes from \p Old to \p New, taking into account the | ||||||
2423 | /// special semantics of C11's _Alignas specifier and C++11's alignas attribute. | ||||||
2424 | /// | ||||||
2425 | /// \return \c true if any attributes were added to \p New. | ||||||
2426 | static bool mergeAlignedAttrs(Sema &S, NamedDecl *New, Decl *Old) { | ||||||
2427 | // Look for alignas attributes on Old, and pick out whichever attribute | ||||||
2428 | // specifies the strictest alignment requirement. | ||||||
2429 | AlignedAttr *OldAlignasAttr = nullptr; | ||||||
2430 | AlignedAttr *OldStrictestAlignAttr = nullptr; | ||||||
2431 | unsigned OldAlign = 0; | ||||||
2432 | for (auto *I : Old->specific_attrs<AlignedAttr>()) { | ||||||
2433 | // FIXME: We have no way of representing inherited dependent alignments | ||||||
2434 | // in a case like: | ||||||
2435 | // template<int A, int B> struct alignas(A) X; | ||||||
2436 | // template<int A, int B> struct alignas(B) X {}; | ||||||
2437 | // For now, we just ignore any alignas attributes which are not on the | ||||||
2438 | // definition in such a case. | ||||||
2439 | if (I->isAlignmentDependent()) | ||||||
2440 | return false; | ||||||
2441 | |||||||
2442 | if (I->isAlignas()) | ||||||
2443 | OldAlignasAttr = I; | ||||||
2444 | |||||||
2445 | unsigned Align = I->getAlignment(S.Context); | ||||||
2446 | if (Align > OldAlign) { | ||||||
2447 | OldAlign = Align; | ||||||
2448 | OldStrictestAlignAttr = I; | ||||||
2449 | } | ||||||
2450 | } | ||||||
2451 | |||||||
2452 | // Look for alignas attributes on New. | ||||||
2453 | AlignedAttr *NewAlignasAttr = nullptr; | ||||||
2454 | unsigned NewAlign = 0; | ||||||
2455 | for (auto *I : New->specific_attrs<AlignedAttr>()) { | ||||||
2456 | if (I->isAlignmentDependent()) | ||||||
2457 | return false; | ||||||
2458 | |||||||
2459 | if (I->isAlignas()) | ||||||
2460 | NewAlignasAttr = I; | ||||||
2461 | |||||||
2462 | unsigned Align = I->getAlignment(S.Context); | ||||||
2463 | if (Align > NewAlign) | ||||||
2464 | NewAlign = Align; | ||||||
2465 | } | ||||||
2466 | |||||||
2467 | if (OldAlignasAttr && NewAlignasAttr && OldAlign != NewAlign) { | ||||||
2468 | // Both declarations have 'alignas' attributes. We require them to match. | ||||||
2469 | // C++11 [dcl.align]p6 and C11 6.7.5/7 both come close to saying this, but | ||||||
2470 | // fall short. (If two declarations both have alignas, they must both match | ||||||
2471 | // every definition, and so must match each other if there is a definition.) | ||||||
2472 | |||||||
2473 | // If either declaration only contains 'alignas(0)' specifiers, then it | ||||||
2474 | // specifies the natural alignment for the type. | ||||||
2475 | if (OldAlign == 0 || NewAlign == 0) { | ||||||
2476 | QualType Ty; | ||||||
2477 | if (ValueDecl *VD = dyn_cast<ValueDecl>(New)) | ||||||
2478 | Ty = VD->getType(); | ||||||
2479 | else | ||||||
2480 | Ty = S.Context.getTagDeclType(cast<TagDecl>(New)); | ||||||
2481 | |||||||
2482 | if (OldAlign == 0) | ||||||
2483 | OldAlign = S.Context.getTypeAlign(Ty); | ||||||
2484 | if (NewAlign == 0) | ||||||
2485 | NewAlign = S.Context.getTypeAlign(Ty); | ||||||
2486 | } | ||||||
2487 | |||||||
2488 | if (OldAlign != NewAlign) { | ||||||
2489 | S.Diag(NewAlignasAttr->getLocation(), diag::err_alignas_mismatch) | ||||||
2490 | << (unsigned)S.Context.toCharUnitsFromBits(OldAlign).getQuantity() | ||||||
2491 | << (unsigned)S.Context.toCharUnitsFromBits(NewAlign).getQuantity(); | ||||||
2492 | S.Diag(OldAlignasAttr->getLocation(), diag::note_previous_declaration); | ||||||
2493 | } | ||||||
2494 | } | ||||||
2495 | |||||||
2496 | if (OldAlignasAttr && !NewAlignasAttr && isAttributeTargetADefinition(New)) { | ||||||
2497 | // C++11 [dcl.align]p6: | ||||||
2498 | // if any declaration of an entity has an alignment-specifier, | ||||||
2499 | // every defining declaration of that entity shall specify an | ||||||
2500 | // equivalent alignment. | ||||||
2501 | // C11 6.7.5/7: | ||||||
2502 | // If the definition of an object does not have an alignment | ||||||
2503 | // specifier, any other declaration of that object shall also | ||||||
2504 | // have no alignment specifier. | ||||||
2505 | S.Diag(New->getLocation(), diag::err_alignas_missing_on_definition) | ||||||
2506 | << OldAlignasAttr; | ||||||
2507 | S.Diag(OldAlignasAttr->getLocation(), diag::note_alignas_on_declaration) | ||||||
2508 | << OldAlignasAttr; | ||||||
2509 | } | ||||||
2510 | |||||||
2511 | bool AnyAdded = false; | ||||||
2512 | |||||||
2513 | // Ensure we have an attribute representing the strictest alignment. | ||||||
2514 | if (OldAlign > NewAlign) { | ||||||
2515 | AlignedAttr *Clone = OldStrictestAlignAttr->clone(S.Context); | ||||||
2516 | Clone->setInherited(true); | ||||||
2517 | New->addAttr(Clone); | ||||||
2518 | AnyAdded = true; | ||||||
2519 | } | ||||||
2520 | |||||||
2521 | // Ensure we have an alignas attribute if the old declaration had one. | ||||||
2522 | if (OldAlignasAttr && !NewAlignasAttr && | ||||||
2523 | !(AnyAdded && OldStrictestAlignAttr->isAlignas())) { | ||||||
2524 | AlignedAttr *Clone = OldAlignasAttr->clone(S.Context); | ||||||
2525 | Clone->setInherited(true); | ||||||
2526 | New->addAttr(Clone); | ||||||
2527 | AnyAdded = true; | ||||||
2528 | } | ||||||
2529 | |||||||
2530 | return AnyAdded; | ||||||
2531 | } | ||||||
2532 | |||||||
2533 | static bool mergeDeclAttribute(Sema &S, NamedDecl *D, | ||||||
2534 | const InheritableAttr *Attr, | ||||||
2535 | Sema::AvailabilityMergeKind AMK) { | ||||||
2536 | // This function copies an attribute Attr from a previous declaration to the | ||||||
2537 | // new declaration D if the new declaration doesn't itself have that attribute | ||||||
2538 | // yet or if that attribute allows duplicates. | ||||||
2539 | // If you're adding a new attribute that requires logic different from | ||||||
2540 | // "use explicit attribute on decl if present, else use attribute from | ||||||
2541 | // previous decl", for example if the attribute needs to be consistent | ||||||
2542 | // between redeclarations, you need to call a custom merge function here. | ||||||
2543 | InheritableAttr *NewAttr = nullptr; | ||||||
2544 | if (const auto *AA = dyn_cast<AvailabilityAttr>(Attr)) | ||||||
2545 | NewAttr = S.mergeAvailabilityAttr( | ||||||
2546 | D, *AA, AA->getPlatform(), AA->isImplicit(), AA->getIntroduced(), | ||||||
2547 | AA->getDeprecated(), AA->getObsoleted(), AA->getUnavailable(), | ||||||
2548 | AA->getMessage(), AA->getStrict(), AA->getReplacement(), AMK, | ||||||
2549 | AA->getPriority()); | ||||||
2550 | else if (const auto *VA = dyn_cast<VisibilityAttr>(Attr)) | ||||||
2551 | NewAttr = S.mergeVisibilityAttr(D, *VA, VA->getVisibility()); | ||||||
2552 | else if (const auto *VA = dyn_cast<TypeVisibilityAttr>(Attr)) | ||||||
2553 | NewAttr = S.mergeTypeVisibilityAttr(D, *VA, VA->getVisibility()); | ||||||
2554 | else if (const auto *ImportA = dyn_cast<DLLImportAttr>(Attr)) | ||||||
2555 | NewAttr = S.mergeDLLImportAttr(D, *ImportA); | ||||||
2556 | else if (const auto *ExportA = dyn_cast<DLLExportAttr>(Attr)) | ||||||
2557 | NewAttr = S.mergeDLLExportAttr(D, *ExportA); | ||||||
2558 | else if (const auto *FA = dyn_cast<FormatAttr>(Attr)) | ||||||
2559 | NewAttr = S.mergeFormatAttr(D, *FA, FA->getType(), FA->getFormatIdx(), | ||||||
2560 | FA->getFirstArg()); | ||||||
2561 | else if (const auto *SA = dyn_cast<SectionAttr>(Attr)) | ||||||
2562 | NewAttr = S.mergeSectionAttr(D, *SA, SA->getName()); | ||||||
2563 | else if (const auto *CSA = dyn_cast<CodeSegAttr>(Attr)) | ||||||
2564 | NewAttr = S.mergeCodeSegAttr(D, *CSA, CSA->getName()); | ||||||
2565 | else if (const auto *IA = dyn_cast<MSInheritanceAttr>(Attr)) | ||||||
2566 | NewAttr = S.mergeMSInheritanceAttr(D, *IA, IA->getBestCase(), | ||||||
2567 | IA->getInheritanceModel()); | ||||||
2568 | else if (const auto *AA = dyn_cast<AlwaysInlineAttr>(Attr)) | ||||||
2569 | NewAttr = S.mergeAlwaysInlineAttr(D, *AA, | ||||||
2570 | &S.Context.Idents.get(AA->getSpelling())); | ||||||
2571 | else if (S.getLangOpts().CUDA && isa<FunctionDecl>(D) && | ||||||
2572 | (isa<CUDAHostAttr>(Attr) || isa<CUDADeviceAttr>(Attr) || | ||||||
2573 | isa<CUDAGlobalAttr>(Attr))) { | ||||||
2574 | // CUDA target attributes are part of function signature for | ||||||
2575 | // overloading purposes and must not be merged. | ||||||
2576 | return false; | ||||||
2577 | } else if (const auto *MA = dyn_cast<MinSizeAttr>(Attr)) | ||||||
2578 | NewAttr = S.mergeMinSizeAttr(D, *MA); | ||||||
2579 | else if (const auto *OA = dyn_cast<OptimizeNoneAttr>(Attr)) | ||||||
2580 | NewAttr = S.mergeOptimizeNoneAttr(D, *OA); | ||||||
2581 | else if (const auto *InternalLinkageA = dyn_cast<InternalLinkageAttr>(Attr)) | ||||||
2582 | NewAttr = S.mergeInternalLinkageAttr(D, *InternalLinkageA); | ||||||
2583 | else if (const auto *CommonA = dyn_cast<CommonAttr>(Attr)) | ||||||
2584 | NewAttr = S.mergeCommonAttr(D, *CommonA); | ||||||
2585 | else if (isa<AlignedAttr>(Attr)) | ||||||
2586 | // AlignedAttrs are handled separately, because we need to handle all | ||||||
2587 | // such attributes on a declaration at the same time. | ||||||
2588 | NewAttr = nullptr; | ||||||
2589 | else if ((isa<DeprecatedAttr>(Attr) || isa<UnavailableAttr>(Attr)) && | ||||||
2590 | (AMK == Sema::AMK_Override || | ||||||
2591 | AMK == Sema::AMK_ProtocolImplementation)) | ||||||
2592 | NewAttr = nullptr; | ||||||
2593 | else if (const auto *UA = dyn_cast<UuidAttr>(Attr)) | ||||||
2594 | NewAttr = S.mergeUuidAttr(D, *UA, UA->getGuid()); | ||||||
2595 | else if (const auto *SLHA = dyn_cast<SpeculativeLoadHardeningAttr>(Attr)) | ||||||
2596 | NewAttr = S.mergeSpeculativeLoadHardeningAttr(D, *SLHA); | ||||||
2597 | else if (const auto *SLHA = dyn_cast<NoSpeculativeLoadHardeningAttr>(Attr)) | ||||||
2598 | NewAttr = S.mergeNoSpeculativeLoadHardeningAttr(D, *SLHA); | ||||||
2599 | else if (Attr->shouldInheritEvenIfAlreadyPresent() || !DeclHasAttr(D, Attr)) | ||||||
2600 | NewAttr = cast<InheritableAttr>(Attr->clone(S.Context)); | ||||||
2601 | |||||||
2602 | if (NewAttr) { | ||||||
2603 | NewAttr->setInherited(true); | ||||||
2604 | D->addAttr(NewAttr); | ||||||
2605 | if (isa<MSInheritanceAttr>(NewAttr)) | ||||||
2606 | S.Consumer.AssignInheritanceModel(cast<CXXRecordDecl>(D)); | ||||||
2607 | return true; | ||||||
2608 | } | ||||||
2609 | |||||||
2610 | return false; | ||||||
2611 | } | ||||||
2612 | |||||||
2613 | static const NamedDecl *getDefinition(const Decl *D) { | ||||||
2614 | if (const TagDecl *TD = dyn_cast<TagDecl>(D)) | ||||||
2615 | return TD->getDefinition(); | ||||||
2616 | if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { | ||||||
2617 | const VarDecl *Def = VD->getDefinition(); | ||||||
2618 | if (Def) | ||||||
2619 | return Def; | ||||||
2620 | return VD->getActingDefinition(); | ||||||
2621 | } | ||||||
2622 | if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) | ||||||
2623 | return FD->getDefinition(); | ||||||
2624 | return nullptr; | ||||||
2625 | } | ||||||
2626 | |||||||
2627 | static bool hasAttribute(const Decl *D, attr::Kind Kind) { | ||||||
2628 | for (const auto *Attribute : D->attrs()) | ||||||
2629 | if (Attribute->getKind() == Kind) | ||||||
2630 | return true; | ||||||
2631 | return false; | ||||||
2632 | } | ||||||
2633 | |||||||
2634 | /// checkNewAttributesAfterDef - If we already have a definition, check that | ||||||
2635 | /// there are no new attributes in this declaration. | ||||||
2636 | static void checkNewAttributesAfterDef(Sema &S, Decl *New, const Decl *Old) { | ||||||
2637 | if (!New->hasAttrs()) | ||||||
2638 | return; | ||||||
2639 | |||||||
2640 | const NamedDecl *Def = getDefinition(Old); | ||||||
2641 | if (!Def || Def == New) | ||||||
2642 | return; | ||||||
2643 | |||||||
2644 | AttrVec &NewAttributes = New->getAttrs(); | ||||||
2645 | for (unsigned I = 0, E = NewAttributes.size(); I != E;) { | ||||||
2646 | const Attr *NewAttribute = NewAttributes[I]; | ||||||
2647 | |||||||
2648 | if (isa<AliasAttr>(NewAttribute) || isa<IFuncAttr>(NewAttribute)) { | ||||||
2649 | if (FunctionDecl *FD = dyn_cast<FunctionDecl>(New)) { | ||||||
2650 | Sema::SkipBodyInfo SkipBody; | ||||||
2651 | S.CheckForFunctionRedefinition(FD, cast<FunctionDecl>(Def), &SkipBody); | ||||||
2652 | |||||||
2653 | // If we're skipping this definition, drop the "alias" attribute. | ||||||
2654 | if (SkipBody.ShouldSkip) { | ||||||
2655 | NewAttributes.erase(NewAttributes.begin() + I); | ||||||
2656 | --E; | ||||||
2657 | continue; | ||||||
2658 | } | ||||||
2659 | } else { | ||||||
2660 | VarDecl *VD = cast<VarDecl>(New); | ||||||
2661 | unsigned Diag = cast<VarDecl>(Def)->isThisDeclarationADefinition() == | ||||||
2662 | VarDecl::TentativeDefinition | ||||||
2663 | ? diag::err_alias_after_tentative | ||||||
2664 | : diag::err_redefinition; | ||||||
2665 | S.Diag(VD->getLocation(), Diag) << VD->getDeclName(); | ||||||
2666 | if (Diag == diag::err_redefinition) | ||||||
2667 | S.notePreviousDefinition(Def, VD->getLocation()); | ||||||
2668 | else | ||||||
2669 | S.Diag(Def->getLocation(), diag::note_previous_definition); | ||||||
2670 | VD->setInvalidDecl(); | ||||||
2671 | } | ||||||
2672 | ++I; | ||||||
2673 | continue; | ||||||
2674 | } | ||||||
2675 | |||||||
2676 | if (const VarDecl *VD = dyn_cast<VarDecl>(Def)) { | ||||||
2677 | // Tentative definitions are only interesting for the alias check above. | ||||||
2678 | if (VD->isThisDeclarationADefinition() != VarDecl::Definition) { | ||||||
2679 | ++I; | ||||||
2680 | continue; | ||||||
2681 | } | ||||||
2682 | } | ||||||
2683 | |||||||
2684 | if (hasAttribute(Def, NewAttribute->getKind())) { | ||||||
2685 | ++I; | ||||||
2686 | continue; // regular attr merging will take care of validating this. | ||||||
2687 | } | ||||||
2688 | |||||||
2689 | if (isa<C11NoReturnAttr>(NewAttribute)) { | ||||||
2690 | // C's _Noreturn is allowed to be added to a function after it is defined. | ||||||
2691 | ++I; | ||||||
2692 | continue; | ||||||
2693 | } else if (isa<UuidAttr>(NewAttribute)) { | ||||||
2694 | // msvc will allow a subsequent definition to add an uuid to a class | ||||||
2695 | ++I; | ||||||
2696 | continue; | ||||||
2697 | } else if (const AlignedAttr *AA = dyn_cast<AlignedAttr>(NewAttribute)) { | ||||||
2698 | if (AA->isAlignas()) { | ||||||
2699 | // C++11 [dcl.align]p6: | ||||||
2700 | // if any declaration of an entity has an alignment-specifier, | ||||||
2701 | // every defining declaration of that entity shall specify an | ||||||
2702 | // equivalent alignment. | ||||||
2703 | // C11 6.7.5/7: | ||||||
2704 | // If the definition of an object does not have an alignment | ||||||
2705 | // specifier, any other declaration of that object shall also | ||||||
2706 | // have no alignment specifier. | ||||||
2707 | S.Diag(Def->getLocation(), diag::err_alignas_missing_on_definition) | ||||||
2708 | << AA; | ||||||
2709 | S.Diag(NewAttribute->getLocation(), diag::note_alignas_on_declaration) | ||||||
2710 | << AA; | ||||||
2711 | NewAttributes.erase(NewAttributes.begin() + I); | ||||||
2712 | --E; | ||||||
2713 | continue; | ||||||
2714 | } | ||||||
2715 | } else if (isa<SelectAnyAttr>(NewAttribute) && | ||||||
2716 | cast<VarDecl>(New)->isInline() && | ||||||
2717 | !cast<VarDecl>(New)->isInlineSpecified()) { | ||||||
2718 | // Don't warn about applying selectany to implicitly inline variables. | ||||||
2719 | // Older compilers and language modes would require the use of selectany | ||||||
2720 | // to make such variables inline, and it would have no effect if we | ||||||
2721 | // honored it. | ||||||
2722 | ++I; | ||||||
2723 | continue; | ||||||
2724 | } | ||||||
2725 | |||||||
2726 | S.Diag(NewAttribute->getLocation(), | ||||||
2727 | diag::warn_attribute_precede_definition); | ||||||
2728 | S.Diag(Def->getLocation(), diag::note_previous_definition); | ||||||
2729 | NewAttributes.erase(NewAttributes.begin() + I); | ||||||
2730 | --E; | ||||||
2731 | } | ||||||
2732 | } | ||||||
2733 | |||||||
2734 | static void diagnoseMissingConstinit(Sema &S, const VarDecl *InitDecl, | ||||||
2735 | const ConstInitAttr *CIAttr, | ||||||
2736 | bool AttrBeforeInit) { | ||||||
2737 | SourceLocation InsertLoc = InitDecl->getInnerLocStart(); | ||||||
2738 | |||||||
2739 | // Figure out a good way to write this specifier on the old declaration. | ||||||
2740 | // FIXME: We should just use the spelling of CIAttr, but we don't preserve | ||||||
2741 | // enough of the attribute list spelling information to extract that without | ||||||
2742 | // heroics. | ||||||
2743 | std::string SuitableSpelling; | ||||||
2744 | if (S.getLangOpts().CPlusPlus2a) | ||||||
2745 | SuitableSpelling = std::string( | ||||||
2746 | S.PP.getLastMacroWithSpelling(InsertLoc, {tok::kw_constinit})); | ||||||
2747 | if (SuitableSpelling.empty() && S.getLangOpts().CPlusPlus11) | ||||||
2748 | SuitableSpelling = std::string(S.PP.getLastMacroWithSpelling( | ||||||
2749 | InsertLoc, {tok::l_square, tok::l_square, | ||||||
2750 | S.PP.getIdentifierInfo("clang"), tok::coloncolon, | ||||||
2751 | S.PP.getIdentifierInfo("require_constant_initialization"), | ||||||
2752 | tok::r_square, tok::r_square})); | ||||||
2753 | if (SuitableSpelling.empty()) | ||||||
2754 | SuitableSpelling = std::string(S.PP.getLastMacroWithSpelling( | ||||||
2755 | InsertLoc, {tok::kw___attribute, tok::l_paren, tok::r_paren, | ||||||
2756 | S.PP.getIdentifierInfo("require_constant_initialization"), | ||||||
2757 | tok::r_paren, tok::r_paren})); | ||||||
2758 | if (SuitableSpelling.empty() && S.getLangOpts().CPlusPlus2a) | ||||||
2759 | SuitableSpelling = "constinit"; | ||||||
2760 | if (SuitableSpelling.empty() && S.getLangOpts().CPlusPlus11) | ||||||
2761 | SuitableSpelling = "[[clang::require_constant_initialization]]"; | ||||||
2762 | if (SuitableSpelling.empty()) | ||||||
2763 | SuitableSpelling = "__attribute__((require_constant_initialization))"; | ||||||
2764 | SuitableSpelling += " "; | ||||||
2765 | |||||||
2766 | if (AttrBeforeInit) { | ||||||
2767 | // extern constinit int a; | ||||||
2768 | // int a = 0; // error (missing 'constinit'), accepted as extension | ||||||
2769 | assert(CIAttr->isConstinit() && "should not diagnose this for attribute")((CIAttr->isConstinit() && "should not diagnose this for attribute" ) ? static_cast<void> (0) : __assert_fail ("CIAttr->isConstinit() && \"should not diagnose this for attribute\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 2769, __PRETTY_FUNCTION__)); | ||||||
2770 | S.Diag(InitDecl->getLocation(), diag::ext_constinit_missing) | ||||||
2771 | << InitDecl << FixItHint::CreateInsertion(InsertLoc, SuitableSpelling); | ||||||
2772 | S.Diag(CIAttr->getLocation(), diag::note_constinit_specified_here); | ||||||
2773 | } else { | ||||||
2774 | // int a = 0; | ||||||
2775 | // constinit extern int a; // error (missing 'constinit') | ||||||
2776 | S.Diag(CIAttr->getLocation(), | ||||||
2777 | CIAttr->isConstinit() ? diag::err_constinit_added_too_late | ||||||
2778 | : diag::warn_require_const_init_added_too_late) | ||||||
2779 | << FixItHint::CreateRemoval(SourceRange(CIAttr->getLocation())); | ||||||
2780 | S.Diag(InitDecl->getLocation(), diag::note_constinit_missing_here) | ||||||
2781 | << CIAttr->isConstinit() | ||||||
2782 | << FixItHint::CreateInsertion(InsertLoc, SuitableSpelling); | ||||||
2783 | } | ||||||
2784 | } | ||||||
2785 | |||||||
2786 | /// mergeDeclAttributes - Copy attributes from the Old decl to the New one. | ||||||
2787 | void Sema::mergeDeclAttributes(NamedDecl *New, Decl *Old, | ||||||
2788 | AvailabilityMergeKind AMK) { | ||||||
2789 | if (UsedAttr *OldAttr = Old->getMostRecentDecl()->getAttr<UsedAttr>()) { | ||||||
2790 | UsedAttr *NewAttr = OldAttr->clone(Context); | ||||||
2791 | NewAttr->setInherited(true); | ||||||
2792 | New->addAttr(NewAttr); | ||||||
2793 | } | ||||||
2794 | |||||||
2795 | if (!Old->hasAttrs() && !New->hasAttrs()) | ||||||
2796 | return; | ||||||
2797 | |||||||
2798 | // [dcl.constinit]p1: | ||||||
2799 | // If the [constinit] specifier is applied to any declaration of a | ||||||
2800 | // variable, it shall be applied to the initializing declaration. | ||||||
2801 | const auto *OldConstInit = Old->getAttr<ConstInitAttr>(); | ||||||
2802 | const auto *NewConstInit = New->getAttr<ConstInitAttr>(); | ||||||
2803 | if (bool(OldConstInit) != bool(NewConstInit)) { | ||||||
2804 | const auto *OldVD = cast<VarDecl>(Old); | ||||||
2805 | auto *NewVD = cast<VarDecl>(New); | ||||||
2806 | |||||||
2807 | // Find the initializing declaration. Note that we might not have linked | ||||||
2808 | // the new declaration into the redeclaration chain yet. | ||||||
2809 | const VarDecl *InitDecl = OldVD->getInitializingDeclaration(); | ||||||
2810 | if (!InitDecl && | ||||||
2811 | (NewVD->hasInit() || NewVD->isThisDeclarationADefinition())) | ||||||
2812 | InitDecl = NewVD; | ||||||
2813 | |||||||
2814 | if (InitDecl == NewVD) { | ||||||
2815 | // This is the initializing declaration. If it would inherit 'constinit', | ||||||
2816 | // that's ill-formed. (Note that we do not apply this to the attribute | ||||||
2817 | // form). | ||||||
2818 | if (OldConstInit && OldConstInit->isConstinit()) | ||||||
2819 | diagnoseMissingConstinit(*this, NewVD, OldConstInit, | ||||||
2820 | /*AttrBeforeInit=*/true); | ||||||
2821 | } else if (NewConstInit) { | ||||||
2822 | // This is the first time we've been told that this declaration should | ||||||
2823 | // have a constant initializer. If we already saw the initializing | ||||||
2824 | // declaration, this is too late. | ||||||
2825 | if (InitDecl && InitDecl != NewVD) { | ||||||
2826 | diagnoseMissingConstinit(*this, InitDecl, NewConstInit, | ||||||
2827 | /*AttrBeforeInit=*/false); | ||||||
2828 | NewVD->dropAttr<ConstInitAttr>(); | ||||||
2829 | } | ||||||
2830 | } | ||||||
2831 | } | ||||||
2832 | |||||||
2833 | // Attributes declared post-definition are currently ignored. | ||||||
2834 | checkNewAttributesAfterDef(*this, New, Old); | ||||||
2835 | |||||||
2836 | if (AsmLabelAttr *NewA = New->getAttr<AsmLabelAttr>()) { | ||||||
2837 | if (AsmLabelAttr *OldA = Old->getAttr<AsmLabelAttr>()) { | ||||||
2838 | if (!OldA->isEquivalent(NewA)) { | ||||||
2839 | // This redeclaration changes __asm__ label. | ||||||
2840 | Diag(New->getLocation(), diag::err_different_asm_label); | ||||||
2841 | Diag(OldA->getLocation(), diag::note_previous_declaration); | ||||||
2842 | } | ||||||
2843 | } else if (Old->isUsed()) { | ||||||
2844 | // This redeclaration adds an __asm__ label to a declaration that has | ||||||
2845 | // already been ODR-used. | ||||||
2846 | Diag(New->getLocation(), diag::err_late_asm_label_name) | ||||||
2847 | << isa<FunctionDecl>(Old) << New->getAttr<AsmLabelAttr>()->getRange(); | ||||||
2848 | } | ||||||
2849 | } | ||||||
2850 | |||||||
2851 | // Re-declaration cannot add abi_tag's. | ||||||
2852 | if (const auto *NewAbiTagAttr = New->getAttr<AbiTagAttr>()) { | ||||||
2853 | if (const auto *OldAbiTagAttr = Old->getAttr<AbiTagAttr>()) { | ||||||
2854 | for (const auto &NewTag : NewAbiTagAttr->tags()) { | ||||||
2855 | if (std::find(OldAbiTagAttr->tags_begin(), OldAbiTagAttr->tags_end(), | ||||||
2856 | NewTag) == OldAbiTagAttr->tags_end()) { | ||||||
2857 | Diag(NewAbiTagAttr->getLocation(), | ||||||
2858 | diag::err_new_abi_tag_on_redeclaration) | ||||||
2859 | << NewTag; | ||||||
2860 | Diag(OldAbiTagAttr->getLocation(), diag::note_previous_declaration); | ||||||
2861 | } | ||||||
2862 | } | ||||||
2863 | } else { | ||||||
2864 | Diag(NewAbiTagAttr->getLocation(), diag::err_abi_tag_on_redeclaration); | ||||||
2865 | Diag(Old->getLocation(), diag::note_previous_declaration); | ||||||
2866 | } | ||||||
2867 | } | ||||||
2868 | |||||||
2869 | // This redeclaration adds a section attribute. | ||||||
2870 | if (New->hasAttr<SectionAttr>() && !Old->hasAttr<SectionAttr>()) { | ||||||
2871 | if (auto *VD = dyn_cast<VarDecl>(New)) { | ||||||
2872 | if (VD->isThisDeclarationADefinition() == VarDecl::DeclarationOnly) { | ||||||
2873 | Diag(New->getLocation(), diag::warn_attribute_section_on_redeclaration); | ||||||
2874 | Diag(Old->getLocation(), diag::note_previous_declaration); | ||||||
2875 | } | ||||||
2876 | } | ||||||
2877 | } | ||||||
2878 | |||||||
2879 | // Redeclaration adds code-seg attribute. | ||||||
2880 | const auto *NewCSA = New->getAttr<CodeSegAttr>(); | ||||||
2881 | if (NewCSA && !Old->hasAttr<CodeSegAttr>() && | ||||||
2882 | !NewCSA->isImplicit() && isa<CXXMethodDecl>(New)) { | ||||||
2883 | Diag(New->getLocation(), diag::warn_mismatched_section) | ||||||
2884 | << 0 /*codeseg*/; | ||||||
2885 | Diag(Old->getLocation(), diag::note_previous_declaration); | ||||||
2886 | } | ||||||
2887 | |||||||
2888 | if (!Old->hasAttrs()) | ||||||
2889 | return; | ||||||
2890 | |||||||
2891 | bool foundAny = New->hasAttrs(); | ||||||
2892 | |||||||
2893 | // Ensure that any moving of objects within the allocated map is done before | ||||||
2894 | // we process them. | ||||||
2895 | if (!foundAny) New->setAttrs(AttrVec()); | ||||||
2896 | |||||||
2897 | for (auto *I : Old->specific_attrs<InheritableAttr>()) { | ||||||
2898 | // Ignore deprecated/unavailable/availability attributes if requested. | ||||||
2899 | AvailabilityMergeKind LocalAMK = AMK_None; | ||||||
2900 | if (isa<DeprecatedAttr>(I) || | ||||||
2901 | isa<UnavailableAttr>(I) || | ||||||
2902 | isa<AvailabilityAttr>(I)) { | ||||||
2903 | switch (AMK) { | ||||||
2904 | case AMK_None: | ||||||
2905 | continue; | ||||||
2906 | |||||||
2907 | case AMK_Redeclaration: | ||||||
2908 | case AMK_Override: | ||||||
2909 | case AMK_ProtocolImplementation: | ||||||
2910 | LocalAMK = AMK; | ||||||
2911 | break; | ||||||
2912 | } | ||||||
2913 | } | ||||||
2914 | |||||||
2915 | // Already handled. | ||||||
2916 | if (isa<UsedAttr>(I)) | ||||||
2917 | continue; | ||||||
2918 | |||||||
2919 | if (mergeDeclAttribute(*this, New, I, LocalAMK)) | ||||||
2920 | foundAny = true; | ||||||
2921 | } | ||||||
2922 | |||||||
2923 | if (mergeAlignedAttrs(*this, New, Old)) | ||||||
2924 | foundAny = true; | ||||||
2925 | |||||||
2926 | if (!foundAny) New->dropAttrs(); | ||||||
2927 | } | ||||||
2928 | |||||||
2929 | /// mergeParamDeclAttributes - Copy attributes from the old parameter | ||||||
2930 | /// to the new one. | ||||||
2931 | static void mergeParamDeclAttributes(ParmVarDecl *newDecl, | ||||||
2932 | const ParmVarDecl *oldDecl, | ||||||
2933 | Sema &S) { | ||||||
2934 | // C++11 [dcl.attr.depend]p2: | ||||||
2935 | // The first declaration of a function shall specify the | ||||||
2936 | // carries_dependency attribute for its declarator-id if any declaration | ||||||
2937 | // of the function specifies the carries_dependency attribute. | ||||||
2938 | const CarriesDependencyAttr *CDA = newDecl->getAttr<CarriesDependencyAttr>(); | ||||||
2939 | if (CDA && !oldDecl->hasAttr<CarriesDependencyAttr>()) { | ||||||
2940 | S.Diag(CDA->getLocation(), | ||||||
2941 | diag::err_carries_dependency_missing_on_first_decl) << 1/*Param*/; | ||||||
2942 | // Find the first declaration of the parameter. | ||||||
2943 | // FIXME: Should we build redeclaration chains for function parameters? | ||||||
2944 | const FunctionDecl *FirstFD = | ||||||
2945 | cast<FunctionDecl>(oldDecl->getDeclContext())->getFirstDecl(); | ||||||
2946 | const ParmVarDecl *FirstVD = | ||||||
2947 | FirstFD->getParamDecl(oldDecl->getFunctionScopeIndex()); | ||||||
2948 | S.Diag(FirstVD->getLocation(), | ||||||
2949 | diag::note_carries_dependency_missing_first_decl) << 1/*Param*/; | ||||||
2950 | } | ||||||
2951 | |||||||
2952 | if (!oldDecl->hasAttrs()) | ||||||
2953 | return; | ||||||
2954 | |||||||
2955 | bool foundAny = newDecl->hasAttrs(); | ||||||
2956 | |||||||
2957 | // Ensure that any moving of objects within the allocated map is | ||||||
2958 | // done before we process them. | ||||||
2959 | if (!foundAny) newDecl->setAttrs(AttrVec()); | ||||||
2960 | |||||||
2961 | for (const auto *I : oldDecl->specific_attrs<InheritableParamAttr>()) { | ||||||
2962 | if (!DeclHasAttr(newDecl, I)) { | ||||||
2963 | InheritableAttr *newAttr = | ||||||
2964 | cast<InheritableParamAttr>(I->clone(S.Context)); | ||||||
2965 | newAttr->setInherited(true); | ||||||
2966 | newDecl->addAttr(newAttr); | ||||||
2967 | foundAny = true; | ||||||
2968 | } | ||||||
2969 | } | ||||||
2970 | |||||||
2971 | if (!foundAny) newDecl->dropAttrs(); | ||||||
2972 | } | ||||||
2973 | |||||||
2974 | static void mergeParamDeclTypes(ParmVarDecl *NewParam, | ||||||
2975 | const ParmVarDecl *OldParam, | ||||||
2976 | Sema &S) { | ||||||
2977 | if (auto Oldnullability = OldParam->getType()->getNullability(S.Context)) { | ||||||
2978 | if (auto Newnullability = NewParam->getType()->getNullability(S.Context)) { | ||||||
2979 | if (*Oldnullability != *Newnullability) { | ||||||
2980 | S.Diag(NewParam->getLocation(), diag::warn_mismatched_nullability_attr) | ||||||
2981 | << DiagNullabilityKind( | ||||||
2982 | *Newnullability, | ||||||
2983 | ((NewParam->getObjCDeclQualifier() & Decl::OBJC_TQ_CSNullability) | ||||||
2984 | != 0)) | ||||||
2985 | << DiagNullabilityKind( | ||||||
2986 | *Oldnullability, | ||||||
2987 | ((OldParam->getObjCDeclQualifier() & Decl::OBJC_TQ_CSNullability) | ||||||
2988 | != 0)); | ||||||
2989 | S.Diag(OldParam->getLocation(), diag::note_previous_declaration); | ||||||
2990 | } | ||||||
2991 | } else { | ||||||
2992 | QualType NewT = NewParam->getType(); | ||||||
2993 | NewT = S.Context.getAttributedType( | ||||||
2994 | AttributedType::getNullabilityAttrKind(*Oldnullability), | ||||||
2995 | NewT, NewT); | ||||||
2996 | NewParam->setType(NewT); | ||||||
2997 | } | ||||||
2998 | } | ||||||
2999 | } | ||||||
3000 | |||||||
3001 | namespace { | ||||||
3002 | |||||||
3003 | /// Used in MergeFunctionDecl to keep track of function parameters in | ||||||
3004 | /// C. | ||||||
3005 | struct GNUCompatibleParamWarning { | ||||||
3006 | ParmVarDecl *OldParm; | ||||||
3007 | ParmVarDecl *NewParm; | ||||||
3008 | QualType PromotedType; | ||||||
3009 | }; | ||||||
3010 | |||||||
3011 | } // end anonymous namespace | ||||||
3012 | |||||||
3013 | // Determine whether the previous declaration was a definition, implicit | ||||||
3014 | // declaration, or a declaration. | ||||||
3015 | template <typename T> | ||||||
3016 | static std::pair<diag::kind, SourceLocation> | ||||||
3017 | getNoteDiagForInvalidRedeclaration(const T *Old, const T *New) { | ||||||
3018 | diag::kind PrevDiag; | ||||||
3019 | SourceLocation OldLocation = Old->getLocation(); | ||||||
3020 | if (Old->isThisDeclarationADefinition()) | ||||||
3021 | PrevDiag = diag::note_previous_definition; | ||||||
3022 | else if (Old->isImplicit()) { | ||||||
3023 | PrevDiag = diag::note_previous_implicit_declaration; | ||||||
3024 | if (OldLocation.isInvalid()) | ||||||
3025 | OldLocation = New->getLocation(); | ||||||
3026 | } else | ||||||
3027 | PrevDiag = diag::note_previous_declaration; | ||||||
3028 | return std::make_pair(PrevDiag, OldLocation); | ||||||
3029 | } | ||||||
3030 | |||||||
3031 | /// canRedefineFunction - checks if a function can be redefined. Currently, | ||||||
3032 | /// only extern inline functions can be redefined, and even then only in | ||||||
3033 | /// GNU89 mode. | ||||||
3034 | static bool canRedefineFunction(const FunctionDecl *FD, | ||||||
3035 | const LangOptions& LangOpts) { | ||||||
3036 | return ((FD->hasAttr<GNUInlineAttr>() || LangOpts.GNUInline) && | ||||||
3037 | !LangOpts.CPlusPlus && | ||||||
3038 | FD->isInlineSpecified() && | ||||||
3039 | FD->getStorageClass() == SC_Extern); | ||||||
3040 | } | ||||||
3041 | |||||||
3042 | const AttributedType *Sema::getCallingConvAttributedType(QualType T) const { | ||||||
3043 | const AttributedType *AT = T->getAs<AttributedType>(); | ||||||
3044 | while (AT && !AT->isCallingConv()) | ||||||
3045 | AT = AT->getModifiedType()->getAs<AttributedType>(); | ||||||
3046 | return AT; | ||||||
3047 | } | ||||||
3048 | |||||||
3049 | template <typename T> | ||||||
3050 | static bool haveIncompatibleLanguageLinkages(const T *Old, const T *New) { | ||||||
3051 | const DeclContext *DC = Old->getDeclContext(); | ||||||
3052 | if (DC->isRecord()) | ||||||
3053 | return false; | ||||||
3054 | |||||||
3055 | LanguageLinkage OldLinkage = Old->getLanguageLinkage(); | ||||||
3056 | if (OldLinkage == CXXLanguageLinkage && New->isInExternCContext()) | ||||||
3057 | return true; | ||||||
3058 | if (OldLinkage == CLanguageLinkage && New->isInExternCXXContext()) | ||||||
3059 | return true; | ||||||
3060 | return false; | ||||||
3061 | } | ||||||
3062 | |||||||
3063 | template<typename T> static bool isExternC(T *D) { return D->isExternC(); } | ||||||
3064 | static bool isExternC(VarTemplateDecl *) { return false; } | ||||||
3065 | |||||||
3066 | /// Check whether a redeclaration of an entity introduced by a | ||||||
3067 | /// using-declaration is valid, given that we know it's not an overload | ||||||
3068 | /// (nor a hidden tag declaration). | ||||||
3069 | template<typename ExpectedDecl> | ||||||
3070 | static bool checkUsingShadowRedecl(Sema &S, UsingShadowDecl *OldS, | ||||||
3071 | ExpectedDecl *New) { | ||||||
3072 | // C++11 [basic.scope.declarative]p4: | ||||||
3073 | // Given a set of declarations in a single declarative region, each of | ||||||
3074 | // which specifies the same unqualified name, | ||||||
3075 | // -- they shall all refer to the same entity, or all refer to functions | ||||||
3076 | // and function templates; or | ||||||
3077 | // -- exactly one declaration shall declare a class name or enumeration | ||||||
3078 | // name that is not a typedef name and the other declarations shall all | ||||||
3079 | // refer to the same variable or enumerator, or all refer to functions | ||||||
3080 | // and function templates; in this case the class name or enumeration | ||||||
3081 | // name is hidden (3.3.10). | ||||||
3082 | |||||||
3083 | // C++11 [namespace.udecl]p14: | ||||||
3084 | // If a function declaration in namespace scope or block scope has the | ||||||
3085 | // same name and the same parameter-type-list as a function introduced | ||||||
3086 | // by a using-declaration, and the declarations do not declare the same | ||||||
3087 | // function, the program is ill-formed. | ||||||
3088 | |||||||
3089 | auto *Old = dyn_cast<ExpectedDecl>(OldS->getTargetDecl()); | ||||||
3090 | if (Old && | ||||||
3091 | !Old->getDeclContext()->getRedeclContext()->Equals( | ||||||
3092 | New->getDeclContext()->getRedeclContext()) && | ||||||
3093 | !(isExternC(Old) && isExternC(New))) | ||||||
3094 | Old = nullptr; | ||||||
3095 | |||||||
3096 | if (!Old) { | ||||||
3097 | S.Diag(New->getLocation(), diag::err_using_decl_conflict_reverse); | ||||||
3098 | S.Diag(OldS->getTargetDecl()->getLocation(), diag::note_using_decl_target); | ||||||
3099 | S.Diag(OldS->getUsingDecl()->getLocation(), diag::note_using_decl) << 0; | ||||||
3100 | return true; | ||||||
3101 | } | ||||||
3102 | return false; | ||||||
3103 | } | ||||||
3104 | |||||||
3105 | static bool hasIdenticalPassObjectSizeAttrs(const FunctionDecl *A, | ||||||
3106 | const FunctionDecl *B) { | ||||||
3107 | assert(A->getNumParams() == B->getNumParams())((A->getNumParams() == B->getNumParams()) ? static_cast <void> (0) : __assert_fail ("A->getNumParams() == B->getNumParams()" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 3107, __PRETTY_FUNCTION__)); | ||||||
3108 | |||||||
3109 | auto AttrEq = [](const ParmVarDecl *A, const ParmVarDecl *B) { | ||||||
3110 | const auto *AttrA = A->getAttr<PassObjectSizeAttr>(); | ||||||
3111 | const auto *AttrB = B->getAttr<PassObjectSizeAttr>(); | ||||||
3112 | if (AttrA == AttrB) | ||||||
3113 | return true; | ||||||
3114 | return AttrA && AttrB && AttrA->getType() == AttrB->getType() && | ||||||
3115 | AttrA->isDynamic() == AttrB->isDynamic(); | ||||||
3116 | }; | ||||||
3117 | |||||||
3118 | return std::equal(A->param_begin(), A->param_end(), B->param_begin(), AttrEq); | ||||||
3119 | } | ||||||
3120 | |||||||
3121 | /// If necessary, adjust the semantic declaration context for a qualified | ||||||
3122 | /// declaration to name the correct inline namespace within the qualifier. | ||||||
3123 | static void adjustDeclContextForDeclaratorDecl(DeclaratorDecl *NewD, | ||||||
3124 | DeclaratorDecl *OldD) { | ||||||
3125 | // The only case where we need to update the DeclContext is when | ||||||
3126 | // redeclaration lookup for a qualified name finds a declaration | ||||||
3127 | // in an inline namespace within the context named by the qualifier: | ||||||
3128 | // | ||||||
3129 | // inline namespace N { int f(); } | ||||||
3130 | // int ::f(); // Sema DC needs adjusting from :: to N::. | ||||||
3131 | // | ||||||
3132 | // For unqualified declarations, the semantic context *can* change | ||||||
3133 | // along the redeclaration chain (for local extern declarations, | ||||||
3134 | // extern "C" declarations, and friend declarations in particular). | ||||||
3135 | if (!NewD->getQualifier()) | ||||||
3136 | return; | ||||||
3137 | |||||||
3138 | // NewD is probably already in the right context. | ||||||
3139 | auto *NamedDC = NewD->getDeclContext()->getRedeclContext(); | ||||||
3140 | auto *SemaDC = OldD->getDeclContext()->getRedeclContext(); | ||||||
3141 | if (NamedDC->Equals(SemaDC)) | ||||||
3142 | return; | ||||||
3143 | |||||||
3144 | assert((NamedDC->InEnclosingNamespaceSetOf(SemaDC) ||(((NamedDC->InEnclosingNamespaceSetOf(SemaDC) || NewD-> isInvalidDecl() || OldD->isInvalidDecl()) && "unexpected context for redeclaration" ) ? static_cast<void> (0) : __assert_fail ("(NamedDC->InEnclosingNamespaceSetOf(SemaDC) || NewD->isInvalidDecl() || OldD->isInvalidDecl()) && \"unexpected context for redeclaration\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 3146, __PRETTY_FUNCTION__)) | ||||||
3145 | NewD->isInvalidDecl() || OldD->isInvalidDecl()) &&(((NamedDC->InEnclosingNamespaceSetOf(SemaDC) || NewD-> isInvalidDecl() || OldD->isInvalidDecl()) && "unexpected context for redeclaration" ) ? static_cast<void> (0) : __assert_fail ("(NamedDC->InEnclosingNamespaceSetOf(SemaDC) || NewD->isInvalidDecl() || OldD->isInvalidDecl()) && \"unexpected context for redeclaration\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 3146, __PRETTY_FUNCTION__)) | ||||||
3146 | "unexpected context for redeclaration")(((NamedDC->InEnclosingNamespaceSetOf(SemaDC) || NewD-> isInvalidDecl() || OldD->isInvalidDecl()) && "unexpected context for redeclaration" ) ? static_cast<void> (0) : __assert_fail ("(NamedDC->InEnclosingNamespaceSetOf(SemaDC) || NewD->isInvalidDecl() || OldD->isInvalidDecl()) && \"unexpected context for redeclaration\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 3146, __PRETTY_FUNCTION__)); | ||||||
3147 | |||||||
3148 | auto *LexDC = NewD->getLexicalDeclContext(); | ||||||
3149 | auto FixSemaDC = [=](NamedDecl *D) { | ||||||
3150 | if (!D) | ||||||
3151 | return; | ||||||
3152 | D->setDeclContext(SemaDC); | ||||||
3153 | D->setLexicalDeclContext(LexDC); | ||||||
3154 | }; | ||||||
3155 | |||||||
3156 | FixSemaDC(NewD); | ||||||
3157 | if (auto *FD = dyn_cast<FunctionDecl>(NewD)) | ||||||
3158 | FixSemaDC(FD->getDescribedFunctionTemplate()); | ||||||
3159 | else if (auto *VD = dyn_cast<VarDecl>(NewD)) | ||||||
3160 | FixSemaDC(VD->getDescribedVarTemplate()); | ||||||
3161 | } | ||||||
3162 | |||||||
3163 | /// MergeFunctionDecl - We just parsed a function 'New' from | ||||||
3164 | /// declarator D which has the same name and scope as a previous | ||||||
3165 | /// declaration 'Old'. Figure out how to resolve this situation, | ||||||
3166 | /// merging decls or emitting diagnostics as appropriate. | ||||||
3167 | /// | ||||||
3168 | /// In C++, New and Old must be declarations that are not | ||||||
3169 | /// overloaded. Use IsOverload to determine whether New and Old are | ||||||
3170 | /// overloaded, and to select the Old declaration that New should be | ||||||
3171 | /// merged with. | ||||||
3172 | /// | ||||||
3173 | /// Returns true if there was an error, false otherwise. | ||||||
3174 | bool Sema::MergeFunctionDecl(FunctionDecl *New, NamedDecl *&OldD, | ||||||
3175 | Scope *S, bool MergeTypeWithOld) { | ||||||
3176 | // Verify the old decl was also a function. | ||||||
3177 | FunctionDecl *Old = OldD->getAsFunction(); | ||||||
3178 | if (!Old) { | ||||||
3179 | if (UsingShadowDecl *Shadow = dyn_cast<UsingShadowDecl>(OldD)) { | ||||||
3180 | if (New->getFriendObjectKind()) { | ||||||
3181 | Diag(New->getLocation(), diag::err_using_decl_friend); | ||||||
3182 | Diag(Shadow->getTargetDecl()->getLocation(), | ||||||
3183 | diag::note_using_decl_target); | ||||||
3184 | Diag(Shadow->getUsingDecl()->getLocation(), | ||||||
3185 | diag::note_using_decl) << 0; | ||||||
3186 | return true; | ||||||
3187 | } | ||||||
3188 | |||||||
3189 | // Check whether the two declarations might declare the same function. | ||||||
3190 | if (checkUsingShadowRedecl<FunctionDecl>(*this, Shadow, New)) | ||||||
3191 | return true; | ||||||
3192 | OldD = Old = cast<FunctionDecl>(Shadow->getTargetDecl()); | ||||||
3193 | } else { | ||||||
3194 | Diag(New->getLocation(), diag::err_redefinition_different_kind) | ||||||
3195 | << New->getDeclName(); | ||||||
3196 | notePreviousDefinition(OldD, New->getLocation()); | ||||||
3197 | return true; | ||||||
3198 | } | ||||||
3199 | } | ||||||
3200 | |||||||
3201 | // If the old declaration is invalid, just give up here. | ||||||
3202 | if (Old->isInvalidDecl()) | ||||||
3203 | return true; | ||||||
3204 | |||||||
3205 | // Disallow redeclaration of some builtins. | ||||||
3206 | if (!getASTContext().canBuiltinBeRedeclared(Old)) { | ||||||
3207 | Diag(New->getLocation(), diag::err_builtin_redeclare) << Old->getDeclName(); | ||||||
3208 | Diag(Old->getLocation(), diag::note_previous_builtin_declaration) | ||||||
3209 | << Old << Old->getType(); | ||||||
3210 | return true; | ||||||
3211 | } | ||||||
3212 | |||||||
3213 | diag::kind PrevDiag; | ||||||
3214 | SourceLocation OldLocation; | ||||||
3215 | std::tie(PrevDiag, OldLocation) = | ||||||
3216 | getNoteDiagForInvalidRedeclaration(Old, New); | ||||||
3217 | |||||||
3218 | // Don't complain about this if we're in GNU89 mode and the old function | ||||||
3219 | // is an extern inline function. | ||||||
3220 | // Don't complain about specializations. They are not supposed to have | ||||||
3221 | // storage classes. | ||||||
3222 | if (!isa<CXXMethodDecl>(New) && !isa<CXXMethodDecl>(Old) && | ||||||
3223 | New->getStorageClass() == SC_Static && | ||||||
3224 | Old->hasExternalFormalLinkage() && | ||||||
3225 | !New->getTemplateSpecializationInfo() && | ||||||
3226 | !canRedefineFunction(Old, getLangOpts())) { | ||||||
3227 | if (getLangOpts().MicrosoftExt) { | ||||||
3228 | Diag(New->getLocation(), diag::ext_static_non_static) << New; | ||||||
3229 | Diag(OldLocation, PrevDiag); | ||||||
3230 | } else { | ||||||
3231 | Diag(New->getLocation(), diag::err_static_non_static) << New; | ||||||
3232 | Diag(OldLocation, PrevDiag); | ||||||
3233 | return true; | ||||||
3234 | } | ||||||
3235 | } | ||||||
3236 | |||||||
3237 | if (New->hasAttr<InternalLinkageAttr>() && | ||||||
3238 | !Old->hasAttr<InternalLinkageAttr>()) { | ||||||
3239 | Diag(New->getLocation(), diag::err_internal_linkage_redeclaration) | ||||||
3240 | << New->getDeclName(); | ||||||
3241 | notePreviousDefinition(Old, New->getLocation()); | ||||||
3242 | New->dropAttr<InternalLinkageAttr>(); | ||||||
3243 | } | ||||||
3244 | |||||||
3245 | if (CheckRedeclarationModuleOwnership(New, Old)) | ||||||
3246 | return true; | ||||||
3247 | |||||||
3248 | if (!getLangOpts().CPlusPlus) { | ||||||
3249 | bool OldOvl = Old->hasAttr<OverloadableAttr>(); | ||||||
3250 | if (OldOvl != New->hasAttr<OverloadableAttr>() && !Old->isImplicit()) { | ||||||
3251 | Diag(New->getLocation(), diag::err_attribute_overloadable_mismatch) | ||||||
3252 | << New << OldOvl; | ||||||
3253 | |||||||
3254 | // Try our best to find a decl that actually has the overloadable | ||||||
3255 | // attribute for the note. In most cases (e.g. programs with only one | ||||||
3256 | // broken declaration/definition), this won't matter. | ||||||
3257 | // | ||||||
3258 | // FIXME: We could do this if we juggled some extra state in | ||||||
3259 | // OverloadableAttr, rather than just removing it. | ||||||
3260 | const Decl *DiagOld = Old; | ||||||
3261 | if (OldOvl) { | ||||||
3262 | auto OldIter = llvm::find_if(Old->redecls(), [](const Decl *D) { | ||||||
3263 | const auto *A = D->getAttr<OverloadableAttr>(); | ||||||
3264 | return A && !A->isImplicit(); | ||||||
3265 | }); | ||||||
3266 | // If we've implicitly added *all* of the overloadable attrs to this | ||||||
3267 | // chain, emitting a "previous redecl" note is pointless. | ||||||
3268 | DiagOld = OldIter == Old->redecls_end() ? nullptr : *OldIter; | ||||||
3269 | } | ||||||
3270 | |||||||
3271 | if (DiagOld) | ||||||
3272 | Diag(DiagOld->getLocation(), | ||||||
3273 | diag::note_attribute_overloadable_prev_overload) | ||||||
3274 | << OldOvl; | ||||||
3275 | |||||||
3276 | if (OldOvl) | ||||||
3277 | New->addAttr(OverloadableAttr::CreateImplicit(Context)); | ||||||
3278 | else | ||||||
3279 | New->dropAttr<OverloadableAttr>(); | ||||||
3280 | } | ||||||
3281 | } | ||||||
3282 | |||||||
3283 | // If a function is first declared with a calling convention, but is later | ||||||
3284 | // declared or defined without one, all following decls assume the calling | ||||||
3285 | // convention of the first. | ||||||
3286 | // | ||||||
3287 | // It's OK if a function is first declared without a calling convention, | ||||||
3288 | // but is later declared or defined with the default calling convention. | ||||||
3289 | // | ||||||
3290 | // To test if either decl has an explicit calling convention, we look for | ||||||
3291 | // AttributedType sugar nodes on the type as written. If they are missing or | ||||||
3292 | // were canonicalized away, we assume the calling convention was implicit. | ||||||
3293 | // | ||||||
3294 | // Note also that we DO NOT return at this point, because we still have | ||||||
3295 | // other tests to run. | ||||||
3296 | QualType OldQType = Context.getCanonicalType(Old->getType()); | ||||||
3297 | QualType NewQType = Context.getCanonicalType(New->getType()); | ||||||
3298 | const FunctionType *OldType = cast<FunctionType>(OldQType); | ||||||
3299 | const FunctionType *NewType = cast<FunctionType>(NewQType); | ||||||
3300 | FunctionType::ExtInfo OldTypeInfo = OldType->getExtInfo(); | ||||||
3301 | FunctionType::ExtInfo NewTypeInfo = NewType->getExtInfo(); | ||||||
3302 | bool RequiresAdjustment = false; | ||||||
3303 | |||||||
3304 | if (OldTypeInfo.getCC() != NewTypeInfo.getCC()) { | ||||||
3305 | FunctionDecl *First = Old->getFirstDecl(); | ||||||
3306 | const FunctionType *FT = | ||||||
3307 | First->getType().getCanonicalType()->castAs<FunctionType>(); | ||||||
3308 | FunctionType::ExtInfo FI = FT->getExtInfo(); | ||||||
3309 | bool NewCCExplicit = getCallingConvAttributedType(New->getType()); | ||||||
3310 | if (!NewCCExplicit) { | ||||||
3311 | // Inherit the CC from the previous declaration if it was specified | ||||||
3312 | // there but not here. | ||||||
3313 | NewTypeInfo = NewTypeInfo.withCallingConv(OldTypeInfo.getCC()); | ||||||
3314 | RequiresAdjustment = true; | ||||||
3315 | } else if (New->getBuiltinID()) { | ||||||
3316 | // Calling Conventions on a Builtin aren't really useful and setting a | ||||||
3317 | // default calling convention and cdecl'ing some builtin redeclarations is | ||||||
3318 | // common, so warn and ignore the calling convention on the redeclaration. | ||||||
3319 | Diag(New->getLocation(), diag::warn_cconv_unsupported) | ||||||
3320 | << FunctionType::getNameForCallConv(NewTypeInfo.getCC()) | ||||||
3321 | << (int)CallingConventionIgnoredReason::BuiltinFunction; | ||||||
3322 | NewTypeInfo = NewTypeInfo.withCallingConv(OldTypeInfo.getCC()); | ||||||
3323 | RequiresAdjustment = true; | ||||||
3324 | } else { | ||||||
3325 | // Calling conventions aren't compatible, so complain. | ||||||
3326 | bool FirstCCExplicit = getCallingConvAttributedType(First->getType()); | ||||||
3327 | Diag(New->getLocation(), diag::err_cconv_change) | ||||||
3328 | << FunctionType::getNameForCallConv(NewTypeInfo.getCC()) | ||||||
3329 | << !FirstCCExplicit | ||||||
3330 | << (!FirstCCExplicit ? "" : | ||||||
3331 | FunctionType::getNameForCallConv(FI.getCC())); | ||||||
3332 | |||||||
3333 | // Put the note on the first decl, since it is the one that matters. | ||||||
3334 | Diag(First->getLocation(), diag::note_previous_declaration); | ||||||
3335 | return true; | ||||||
3336 | } | ||||||
3337 | } | ||||||
3338 | |||||||
3339 | // FIXME: diagnose the other way around? | ||||||
3340 | if (OldTypeInfo.getNoReturn() && !NewTypeInfo.getNoReturn()) { | ||||||
3341 | NewTypeInfo = NewTypeInfo.withNoReturn(true); | ||||||
3342 | RequiresAdjustment = true; | ||||||
3343 | } | ||||||
3344 | |||||||
3345 | // Merge regparm attribute. | ||||||
3346 | if (OldTypeInfo.getHasRegParm() != NewTypeInfo.getHasRegParm() || | ||||||
3347 | OldTypeInfo.getRegParm() != NewTypeInfo.getRegParm()) { | ||||||
3348 | if (NewTypeInfo.getHasRegParm()) { | ||||||
3349 | Diag(New->getLocation(), diag::err_regparm_mismatch) | ||||||
3350 | << NewType->getRegParmType() | ||||||
3351 | << OldType->getRegParmType(); | ||||||
3352 | Diag(OldLocation, diag::note_previous_declaration); | ||||||
3353 | return true; | ||||||
3354 | } | ||||||
3355 | |||||||
3356 | NewTypeInfo = NewTypeInfo.withRegParm(OldTypeInfo.getRegParm()); | ||||||
3357 | RequiresAdjustment = true; | ||||||
3358 | } | ||||||
3359 | |||||||
3360 | // Merge ns_returns_retained attribute. | ||||||
3361 | if (OldTypeInfo.getProducesResult() != NewTypeInfo.getProducesResult()) { | ||||||
3362 | if (NewTypeInfo.getProducesResult()) { | ||||||
3363 | Diag(New->getLocation(), diag::err_function_attribute_mismatch) | ||||||
3364 | << "'ns_returns_retained'"; | ||||||
3365 | Diag(OldLocation, diag::note_previous_declaration); | ||||||
3366 | return true; | ||||||
3367 | } | ||||||
3368 | |||||||
3369 | NewTypeInfo = NewTypeInfo.withProducesResult(true); | ||||||
3370 | RequiresAdjustment = true; | ||||||
3371 | } | ||||||
3372 | |||||||
3373 | if (OldTypeInfo.getNoCallerSavedRegs() != | ||||||
3374 | NewTypeInfo.getNoCallerSavedRegs()) { | ||||||
3375 | if (NewTypeInfo.getNoCallerSavedRegs()) { | ||||||
3376 | AnyX86NoCallerSavedRegistersAttr *Attr = | ||||||
3377 | New->getAttr<AnyX86NoCallerSavedRegistersAttr>(); | ||||||
3378 | Diag(New->getLocation(), diag::err_function_attribute_mismatch) << Attr; | ||||||
3379 | Diag(OldLocation, diag::note_previous_declaration); | ||||||
3380 | return true; | ||||||
3381 | } | ||||||
3382 | |||||||
3383 | NewTypeInfo = NewTypeInfo.withNoCallerSavedRegs(true); | ||||||
3384 | RequiresAdjustment = true; | ||||||
3385 | } | ||||||
3386 | |||||||
3387 | if (RequiresAdjustment) { | ||||||
3388 | const FunctionType *AdjustedType = New->getType()->getAs<FunctionType>(); | ||||||
3389 | AdjustedType = Context.adjustFunctionType(AdjustedType, NewTypeInfo); | ||||||
3390 | New->setType(QualType(AdjustedType, 0)); | ||||||
3391 | NewQType = Context.getCanonicalType(New->getType()); | ||||||
3392 | } | ||||||
3393 | |||||||
3394 | // If this redeclaration makes the function inline, we may need to add it to | ||||||
3395 | // UndefinedButUsed. | ||||||
3396 | if (!Old->isInlined() && New->isInlined() && | ||||||
3397 | !New->hasAttr<GNUInlineAttr>() && | ||||||
3398 | !getLangOpts().GNUInline && | ||||||
3399 | Old->isUsed(false) && | ||||||
3400 | !Old->isDefined() && !New->isThisDeclarationADefinition()) | ||||||
3401 | UndefinedButUsed.insert(std::make_pair(Old->getCanonicalDecl(), | ||||||
3402 | SourceLocation())); | ||||||
3403 | |||||||
3404 | // If this redeclaration makes it newly gnu_inline, we don't want to warn | ||||||
3405 | // about it. | ||||||
3406 | if (New->hasAttr<GNUInlineAttr>() && | ||||||
3407 | Old->isInlined() && !Old->hasAttr<GNUInlineAttr>()) { | ||||||
3408 | UndefinedButUsed.erase(Old->getCanonicalDecl()); | ||||||
3409 | } | ||||||
3410 | |||||||
3411 | // If pass_object_size params don't match up perfectly, this isn't a valid | ||||||
3412 | // redeclaration. | ||||||
3413 | if (Old->getNumParams() > 0 && Old->getNumParams() == New->getNumParams() && | ||||||
3414 | !hasIdenticalPassObjectSizeAttrs(Old, New)) { | ||||||
3415 | Diag(New->getLocation(), diag::err_different_pass_object_size_params) | ||||||
3416 | << New->getDeclName(); | ||||||
3417 | Diag(OldLocation, PrevDiag) << Old << Old->getType(); | ||||||
3418 | return true; | ||||||
3419 | } | ||||||
3420 | |||||||
3421 | if (getLangOpts().CPlusPlus) { | ||||||
3422 | // C++1z [over.load]p2 | ||||||
3423 | // Certain function declarations cannot be overloaded: | ||||||
3424 | // -- Function declarations that differ only in the return type, | ||||||
3425 | // the exception specification, or both cannot be overloaded. | ||||||
3426 | |||||||
3427 | // Check the exception specifications match. This may recompute the type of | ||||||
3428 | // both Old and New if it resolved exception specifications, so grab the | ||||||
3429 | // types again after this. Because this updates the type, we do this before | ||||||
3430 | // any of the other checks below, which may update the "de facto" NewQType | ||||||
3431 | // but do not necessarily update the type of New. | ||||||
3432 | if (CheckEquivalentExceptionSpec(Old, New)) | ||||||
3433 | return true; | ||||||
3434 | OldQType = Context.getCanonicalType(Old->getType()); | ||||||
3435 | NewQType = Context.getCanonicalType(New->getType()); | ||||||
3436 | |||||||
3437 | // Go back to the type source info to compare the declared return types, | ||||||
3438 | // per C++1y [dcl.type.auto]p13: | ||||||
3439 | // Redeclarations or specializations of a function or function template | ||||||
3440 | // with a declared return type that uses a placeholder type shall also | ||||||
3441 | // use that placeholder, not a deduced type. | ||||||
3442 | QualType OldDeclaredReturnType = Old->getDeclaredReturnType(); | ||||||
3443 | QualType NewDeclaredReturnType = New->getDeclaredReturnType(); | ||||||
3444 | if (!Context.hasSameType(OldDeclaredReturnType, NewDeclaredReturnType) && | ||||||
3445 | canFullyTypeCheckRedeclaration(New, Old, NewDeclaredReturnType, | ||||||
3446 | OldDeclaredReturnType)) { | ||||||
3447 | QualType ResQT; | ||||||
3448 | if (NewDeclaredReturnType->isObjCObjectPointerType() && | ||||||
3449 | OldDeclaredReturnType->isObjCObjectPointerType()) | ||||||
3450 | // FIXME: This does the wrong thing for a deduced return type. | ||||||
3451 | ResQT = Context.mergeObjCGCQualifiers(NewQType, OldQType); | ||||||
3452 | if (ResQT.isNull()) { | ||||||
3453 | if (New->isCXXClassMember() && New->isOutOfLine()) | ||||||
3454 | Diag(New->getLocation(), diag::err_member_def_does_not_match_ret_type) | ||||||
3455 | << New << New->getReturnTypeSourceRange(); | ||||||
3456 | else | ||||||
3457 | Diag(New->getLocation(), diag::err_ovl_diff_return_type) | ||||||
3458 | << New->getReturnTypeSourceRange(); | ||||||
3459 | Diag(OldLocation, PrevDiag) << Old << Old->getType() | ||||||
3460 | << Old->getReturnTypeSourceRange(); | ||||||
3461 | return true; | ||||||
3462 | } | ||||||
3463 | else | ||||||
3464 | NewQType = ResQT; | ||||||
3465 | } | ||||||
3466 | |||||||
3467 | QualType OldReturnType = OldType->getReturnType(); | ||||||
3468 | QualType NewReturnType = cast<FunctionType>(NewQType)->getReturnType(); | ||||||
3469 | if (OldReturnType != NewReturnType) { | ||||||
3470 | // If this function has a deduced return type and has already been | ||||||
3471 | // defined, copy the deduced value from the old declaration. | ||||||
3472 | AutoType *OldAT = Old->getReturnType()->getContainedAutoType(); | ||||||
3473 | if (OldAT && OldAT->isDeduced()) { | ||||||
3474 | New->setType( | ||||||
3475 | SubstAutoType(New->getType(), | ||||||
3476 | OldAT->isDependentType() ? Context.DependentTy | ||||||
3477 | : OldAT->getDeducedType())); | ||||||
3478 | NewQType = Context.getCanonicalType( | ||||||
3479 | SubstAutoType(NewQType, | ||||||
3480 | OldAT->isDependentType() ? Context.DependentTy | ||||||
3481 | : OldAT->getDeducedType())); | ||||||
3482 | } | ||||||
3483 | } | ||||||
3484 | |||||||
3485 | const CXXMethodDecl *OldMethod = dyn_cast<CXXMethodDecl>(Old); | ||||||
3486 | CXXMethodDecl *NewMethod = dyn_cast<CXXMethodDecl>(New); | ||||||
3487 | if (OldMethod && NewMethod) { | ||||||
3488 | // Preserve triviality. | ||||||
3489 | NewMethod->setTrivial(OldMethod->isTrivial()); | ||||||
3490 | |||||||
3491 | // MSVC allows explicit template specialization at class scope: | ||||||
3492 | // 2 CXXMethodDecls referring to the same function will be injected. | ||||||
3493 | // We don't want a redeclaration error. | ||||||
3494 | bool IsClassScopeExplicitSpecialization = | ||||||
3495 | OldMethod->isFunctionTemplateSpecialization() && | ||||||
3496 | NewMethod->isFunctionTemplateSpecialization(); | ||||||
3497 | bool isFriend = NewMethod->getFriendObjectKind(); | ||||||
3498 | |||||||
3499 | if (!isFriend && NewMethod->getLexicalDeclContext()->isRecord() && | ||||||
3500 | !IsClassScopeExplicitSpecialization) { | ||||||
3501 | // -- Member function declarations with the same name and the | ||||||
3502 | // same parameter types cannot be overloaded if any of them | ||||||
3503 | // is a static member function declaration. | ||||||
3504 | if (OldMethod->isStatic() != NewMethod->isStatic()) { | ||||||
3505 | Diag(New->getLocation(), diag::err_ovl_static_nonstatic_member); | ||||||
3506 | Diag(OldLocation, PrevDiag) << Old << Old->getType(); | ||||||
3507 | return true; | ||||||
3508 | } | ||||||
3509 | |||||||
3510 | // C++ [class.mem]p1: | ||||||
3511 | // [...] A member shall not be declared twice in the | ||||||
3512 | // member-specification, except that a nested class or member | ||||||
3513 | // class template can be declared and then later defined. | ||||||
3514 | if (!inTemplateInstantiation()) { | ||||||
3515 | unsigned NewDiag; | ||||||
3516 | if (isa<CXXConstructorDecl>(OldMethod)) | ||||||
3517 | NewDiag = diag::err_constructor_redeclared; | ||||||
3518 | else if (isa<CXXDestructorDecl>(NewMethod)) | ||||||
3519 | NewDiag = diag::err_destructor_redeclared; | ||||||
3520 | else if (isa<CXXConversionDecl>(NewMethod)) | ||||||
3521 | NewDiag = diag::err_conv_function_redeclared; | ||||||
3522 | else | ||||||
3523 | NewDiag = diag::err_member_redeclared; | ||||||
3524 | |||||||
3525 | Diag(New->getLocation(), NewDiag); | ||||||
3526 | } else { | ||||||
3527 | Diag(New->getLocation(), diag::err_member_redeclared_in_instantiation) | ||||||
3528 | << New << New->getType(); | ||||||
3529 | } | ||||||
3530 | Diag(OldLocation, PrevDiag) << Old << Old->getType(); | ||||||
3531 | return true; | ||||||
3532 | |||||||
3533 | // Complain if this is an explicit declaration of a special | ||||||
3534 | // member that was initially declared implicitly. | ||||||
3535 | // | ||||||
3536 | // As an exception, it's okay to befriend such methods in order | ||||||
3537 | // to permit the implicit constructor/destructor/operator calls. | ||||||
3538 | } else if (OldMethod->isImplicit()) { | ||||||
3539 | if (isFriend) { | ||||||
3540 | NewMethod->setImplicit(); | ||||||
3541 | } else { | ||||||
3542 | Diag(NewMethod->getLocation(), | ||||||
3543 | diag::err_definition_of_implicitly_declared_member) | ||||||
3544 | << New << getSpecialMember(OldMethod); | ||||||
3545 | return true; | ||||||
3546 | } | ||||||
3547 | } else if (OldMethod->getFirstDecl()->isExplicitlyDefaulted() && !isFriend) { | ||||||
3548 | Diag(NewMethod->getLocation(), | ||||||
3549 | diag::err_definition_of_explicitly_defaulted_member) | ||||||
3550 | << getSpecialMember(OldMethod); | ||||||
3551 | return true; | ||||||
3552 | } | ||||||
3553 | } | ||||||
3554 | |||||||
3555 | // C++11 [dcl.attr.noreturn]p1: | ||||||
3556 | // The first declaration of a function shall specify the noreturn | ||||||
3557 | // attribute if any declaration of that function specifies the noreturn | ||||||
3558 | // attribute. | ||||||
3559 | const CXX11NoReturnAttr *NRA = New->getAttr<CXX11NoReturnAttr>(); | ||||||
3560 | if (NRA && !Old->hasAttr<CXX11NoReturnAttr>()) { | ||||||
3561 | Diag(NRA->getLocation(), diag::err_noreturn_missing_on_first_decl); | ||||||
3562 | Diag(Old->getFirstDecl()->getLocation(), | ||||||
3563 | diag::note_noreturn_missing_first_decl); | ||||||
3564 | } | ||||||
3565 | |||||||
3566 | // C++11 [dcl.attr.depend]p2: | ||||||
3567 | // The first declaration of a function shall specify the | ||||||
3568 | // carries_dependency attribute for its declarator-id if any declaration | ||||||
3569 | // of the function specifies the carries_dependency attribute. | ||||||
3570 | const CarriesDependencyAttr *CDA = New->getAttr<CarriesDependencyAttr>(); | ||||||
3571 | if (CDA && !Old->hasAttr<CarriesDependencyAttr>()) { | ||||||
3572 | Diag(CDA->getLocation(), | ||||||
3573 | diag::err_carries_dependency_missing_on_first_decl) << 0/*Function*/; | ||||||
3574 | Diag(Old->getFirstDecl()->getLocation(), | ||||||
3575 | diag::note_carries_dependency_missing_first_decl) << 0/*Function*/; | ||||||
3576 | } | ||||||
3577 | |||||||
3578 | // (C++98 8.3.5p3): | ||||||
3579 | // All declarations for a function shall agree exactly in both the | ||||||
3580 | // return type and the parameter-type-list. | ||||||
3581 | // We also want to respect all the extended bits except noreturn. | ||||||
3582 | |||||||
3583 | // noreturn should now match unless the old type info didn't have it. | ||||||
3584 | QualType OldQTypeForComparison = OldQType; | ||||||
3585 | if (!OldTypeInfo.getNoReturn() && NewTypeInfo.getNoReturn()) { | ||||||
3586 | auto *OldType = OldQType->castAs<FunctionProtoType>(); | ||||||
3587 | const FunctionType *OldTypeForComparison | ||||||
3588 | = Context.adjustFunctionType(OldType, OldTypeInfo.withNoReturn(true)); | ||||||
3589 | OldQTypeForComparison = QualType(OldTypeForComparison, 0); | ||||||
3590 | assert(OldQTypeForComparison.isCanonical())((OldQTypeForComparison.isCanonical()) ? static_cast<void> (0) : __assert_fail ("OldQTypeForComparison.isCanonical()", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 3590, __PRETTY_FUNCTION__)); | ||||||
3591 | } | ||||||
3592 | |||||||
3593 | if (haveIncompatibleLanguageLinkages(Old, New)) { | ||||||
3594 | // As a special case, retain the language linkage from previous | ||||||
3595 | // declarations of a friend function as an extension. | ||||||
3596 | // | ||||||
3597 | // This liberal interpretation of C++ [class.friend]p3 matches GCC/MSVC | ||||||
3598 | // and is useful because there's otherwise no way to specify language | ||||||
3599 | // linkage within class scope. | ||||||
3600 | // | ||||||
3601 | // Check cautiously as the friend object kind isn't yet complete. | ||||||
3602 | if (New->getFriendObjectKind() != Decl::FOK_None) { | ||||||
3603 | Diag(New->getLocation(), diag::ext_retained_language_linkage) << New; | ||||||
3604 | Diag(OldLocation, PrevDiag); | ||||||
3605 | } else { | ||||||
3606 | Diag(New->getLocation(), diag::err_different_language_linkage) << New; | ||||||
3607 | Diag(OldLocation, PrevDiag); | ||||||
3608 | return true; | ||||||
3609 | } | ||||||
3610 | } | ||||||
3611 | |||||||
3612 | // If the function types are compatible, merge the declarations. Ignore the | ||||||
3613 | // exception specifier because it was already checked above in | ||||||
3614 | // CheckEquivalentExceptionSpec, and we don't want follow-on diagnostics | ||||||
3615 | // about incompatible types under -fms-compatibility. | ||||||
3616 | if (Context.hasSameFunctionTypeIgnoringExceptionSpec(OldQTypeForComparison, | ||||||
3617 | NewQType)) | ||||||
3618 | return MergeCompatibleFunctionDecls(New, Old, S, MergeTypeWithOld); | ||||||
3619 | |||||||
3620 | // If the types are imprecise (due to dependent constructs in friends or | ||||||
3621 | // local extern declarations), it's OK if they differ. We'll check again | ||||||
3622 | // during instantiation. | ||||||
3623 | if (!canFullyTypeCheckRedeclaration(New, Old, NewQType, OldQType)) | ||||||
3624 | return false; | ||||||
3625 | |||||||
3626 | // Fall through for conflicting redeclarations and redefinitions. | ||||||
3627 | } | ||||||
3628 | |||||||
3629 | // C: Function types need to be compatible, not identical. This handles | ||||||
3630 | // duplicate function decls like "void f(int); void f(enum X);" properly. | ||||||
3631 | if (!getLangOpts().CPlusPlus && | ||||||
3632 | Context.typesAreCompatible(OldQType, NewQType)) { | ||||||
3633 | const FunctionType *OldFuncType = OldQType->getAs<FunctionType>(); | ||||||
3634 | const FunctionType *NewFuncType = NewQType->getAs<FunctionType>(); | ||||||
3635 | const FunctionProtoType *OldProto = nullptr; | ||||||
3636 | if (MergeTypeWithOld && isa<FunctionNoProtoType>(NewFuncType) && | ||||||
3637 | (OldProto = dyn_cast<FunctionProtoType>(OldFuncType))) { | ||||||
3638 | // The old declaration provided a function prototype, but the | ||||||
3639 | // new declaration does not. Merge in the prototype. | ||||||
3640 | assert(!OldProto->hasExceptionSpec() && "Exception spec in C")((!OldProto->hasExceptionSpec() && "Exception spec in C" ) ? static_cast<void> (0) : __assert_fail ("!OldProto->hasExceptionSpec() && \"Exception spec in C\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 3640, __PRETTY_FUNCTION__)); | ||||||
3641 | SmallVector<QualType, 16> ParamTypes(OldProto->param_types()); | ||||||
3642 | NewQType = | ||||||
3643 | Context.getFunctionType(NewFuncType->getReturnType(), ParamTypes, | ||||||
3644 | OldProto->getExtProtoInfo()); | ||||||
3645 | New->setType(NewQType); | ||||||
3646 | New->setHasInheritedPrototype(); | ||||||
3647 | |||||||
3648 | // Synthesize parameters with the same types. | ||||||
3649 | SmallVector<ParmVarDecl*, 16> Params; | ||||||
3650 | for (const auto &ParamType : OldProto->param_types()) { | ||||||
3651 | ParmVarDecl *Param = ParmVarDecl::Create(Context, New, SourceLocation(), | ||||||
3652 | SourceLocation(), nullptr, | ||||||
3653 | ParamType, /*TInfo=*/nullptr, | ||||||
3654 | SC_None, nullptr); | ||||||
3655 | Param->setScopeInfo(0, Params.size()); | ||||||
3656 | Param->setImplicit(); | ||||||
3657 | Params.push_back(Param); | ||||||
3658 | } | ||||||
3659 | |||||||
3660 | New->setParams(Params); | ||||||
3661 | } | ||||||
3662 | |||||||
3663 | return MergeCompatibleFunctionDecls(New, Old, S, MergeTypeWithOld); | ||||||
3664 | } | ||||||
3665 | |||||||
3666 | // Check if the function types are compatible when pointer size address | ||||||
3667 | // spaces are ignored. | ||||||
3668 | if (Context.hasSameFunctionTypeIgnoringPtrSizes(OldQType, NewQType)) | ||||||
3669 | return false; | ||||||
3670 | |||||||
3671 | // GNU C permits a K&R definition to follow a prototype declaration | ||||||
3672 | // if the declared types of the parameters in the K&R definition | ||||||
3673 | // match the types in the prototype declaration, even when the | ||||||
3674 | // promoted types of the parameters from the K&R definition differ | ||||||
3675 | // from the types in the prototype. GCC then keeps the types from | ||||||
3676 | // the prototype. | ||||||
3677 | // | ||||||
3678 | // If a variadic prototype is followed by a non-variadic K&R definition, | ||||||
3679 | // the K&R definition becomes variadic. This is sort of an edge case, but | ||||||
3680 | // it's legal per the standard depending on how you read C99 6.7.5.3p15 and | ||||||
3681 | // C99 6.9.1p8. | ||||||
3682 | if (!getLangOpts().CPlusPlus && | ||||||
3683 | Old->hasPrototype() && !New->hasPrototype() && | ||||||
3684 | New->getType()->getAs<FunctionProtoType>() && | ||||||
3685 | Old->getNumParams() == New->getNumParams()) { | ||||||
3686 | SmallVector<QualType, 16> ArgTypes; | ||||||
3687 | SmallVector<GNUCompatibleParamWarning, 16> Warnings; | ||||||
3688 | const FunctionProtoType *OldProto | ||||||
3689 | = Old->getType()->getAs<FunctionProtoType>(); | ||||||
3690 | const FunctionProtoType *NewProto | ||||||
3691 | = New->getType()->getAs<FunctionProtoType>(); | ||||||
3692 | |||||||
3693 | // Determine whether this is the GNU C extension. | ||||||
3694 | QualType MergedReturn = Context.mergeTypes(OldProto->getReturnType(), | ||||||
3695 | NewProto->getReturnType()); | ||||||
3696 | bool LooseCompatible = !MergedReturn.isNull(); | ||||||
3697 | for (unsigned Idx = 0, End = Old->getNumParams(); | ||||||
3698 | LooseCompatible && Idx != End; ++Idx) { | ||||||
3699 | ParmVarDecl *OldParm = Old->getParamDecl(Idx); | ||||||
3700 | ParmVarDecl *NewParm = New->getParamDecl(Idx); | ||||||
3701 | if (Context.typesAreCompatible(OldParm->getType(), | ||||||
3702 | NewProto->getParamType(Idx))) { | ||||||
3703 | ArgTypes.push_back(NewParm->getType()); | ||||||
3704 | } else if (Context.typesAreCompatible(OldParm->getType(), | ||||||
3705 | NewParm->getType(), | ||||||
3706 | /*CompareUnqualified=*/true)) { | ||||||
3707 | GNUCompatibleParamWarning Warn = { OldParm, NewParm, | ||||||
3708 | NewProto->getParamType(Idx) }; | ||||||
3709 | Warnings.push_back(Warn); | ||||||
3710 | ArgTypes.push_back(NewParm->getType()); | ||||||
3711 | } else | ||||||
3712 | LooseCompatible = false; | ||||||
3713 | } | ||||||
3714 | |||||||
3715 | if (LooseCompatible) { | ||||||
3716 | for (unsigned Warn = 0; Warn < Warnings.size(); ++Warn) { | ||||||
3717 | Diag(Warnings[Warn].NewParm->getLocation(), | ||||||
3718 | diag::ext_param_promoted_not_compatible_with_prototype) | ||||||
3719 | << Warnings[Warn].PromotedType | ||||||
3720 | << Warnings[Warn].OldParm->getType(); | ||||||
3721 | if (Warnings[Warn].OldParm->getLocation().isValid()) | ||||||
3722 | Diag(Warnings[Warn].OldParm->getLocation(), | ||||||
3723 | diag::note_previous_declaration); | ||||||
3724 | } | ||||||
3725 | |||||||
3726 | if (MergeTypeWithOld) | ||||||
3727 | New->setType(Context.getFunctionType(MergedReturn, ArgTypes, | ||||||
3728 | OldProto->getExtProtoInfo())); | ||||||
3729 | return MergeCompatibleFunctionDecls(New, Old, S, MergeTypeWithOld); | ||||||
3730 | } | ||||||
3731 | |||||||
3732 | // Fall through to diagnose conflicting types. | ||||||
3733 | } | ||||||
3734 | |||||||
3735 | // A function that has already been declared has been redeclared or | ||||||
3736 | // defined with a different type; show an appropriate diagnostic. | ||||||
3737 | |||||||
3738 | // If the previous declaration was an implicitly-generated builtin | ||||||
3739 | // declaration, then at the very least we should use a specialized note. | ||||||
3740 | unsigned BuiltinID; | ||||||
3741 | if (Old->isImplicit() && (BuiltinID = Old->getBuiltinID())) { | ||||||
3742 | // If it's actually a library-defined builtin function like 'malloc' | ||||||
3743 | // or 'printf', just warn about the incompatible redeclaration. | ||||||
3744 | if (Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID)) { | ||||||
3745 | Diag(New->getLocation(), diag::warn_redecl_library_builtin) << New; | ||||||
3746 | Diag(OldLocation, diag::note_previous_builtin_declaration) | ||||||
3747 | << Old << Old->getType(); | ||||||
3748 | |||||||
3749 | // If this is a global redeclaration, just forget hereafter | ||||||
3750 | // about the "builtin-ness" of the function. | ||||||
3751 | // | ||||||
3752 | // Doing this for local extern declarations is problematic. If | ||||||
3753 | // the builtin declaration remains visible, a second invalid | ||||||
3754 | // local declaration will produce a hard error; if it doesn't | ||||||
3755 | // remain visible, a single bogus local redeclaration (which is | ||||||
3756 | // actually only a warning) could break all the downstream code. | ||||||
3757 | if (!New->getLexicalDeclContext()->isFunctionOrMethod()) | ||||||
3758 | New->getIdentifier()->revertBuiltin(); | ||||||
3759 | |||||||
3760 | return false; | ||||||
3761 | } | ||||||
3762 | |||||||
3763 | PrevDiag = diag::note_previous_builtin_declaration; | ||||||
3764 | } | ||||||
3765 | |||||||
3766 | Diag(New->getLocation(), diag::err_conflicting_types) << New->getDeclName(); | ||||||
3767 | Diag(OldLocation, PrevDiag) << Old << Old->getType(); | ||||||
3768 | return true; | ||||||
3769 | } | ||||||
3770 | |||||||
3771 | /// Completes the merge of two function declarations that are | ||||||
3772 | /// known to be compatible. | ||||||
3773 | /// | ||||||
3774 | /// This routine handles the merging of attributes and other | ||||||
3775 | /// properties of function declarations from the old declaration to | ||||||
3776 | /// the new declaration, once we know that New is in fact a | ||||||
3777 | /// redeclaration of Old. | ||||||
3778 | /// | ||||||
3779 | /// \returns false | ||||||
3780 | bool Sema::MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old, | ||||||
3781 | Scope *S, bool MergeTypeWithOld) { | ||||||
3782 | // Merge the attributes | ||||||
3783 | mergeDeclAttributes(New, Old); | ||||||
3784 | |||||||
3785 | // Merge "pure" flag. | ||||||
3786 | if (Old->isPure()) | ||||||
3787 | New->setPure(); | ||||||
3788 | |||||||
3789 | // Merge "used" flag. | ||||||
3790 | if (Old->getMostRecentDecl()->isUsed(false)) | ||||||
3791 | New->setIsUsed(); | ||||||
3792 | |||||||
3793 | // Merge attributes from the parameters. These can mismatch with K&R | ||||||
3794 | // declarations. | ||||||
3795 | if (New->getNumParams() == Old->getNumParams()) | ||||||
3796 | for (unsigned i = 0, e = New->getNumParams(); i != e; ++i) { | ||||||
3797 | ParmVarDecl *NewParam = New->getParamDecl(i); | ||||||
3798 | ParmVarDecl *OldParam = Old->getParamDecl(i); | ||||||
3799 | mergeParamDeclAttributes(NewParam, OldParam, *this); | ||||||
3800 | mergeParamDeclTypes(NewParam, OldParam, *this); | ||||||
3801 | } | ||||||
3802 | |||||||
3803 | if (getLangOpts().CPlusPlus) | ||||||
3804 | return MergeCXXFunctionDecl(New, Old, S); | ||||||
3805 | |||||||
3806 | // Merge the function types so the we get the composite types for the return | ||||||
3807 | // and argument types. Per C11 6.2.7/4, only update the type if the old decl | ||||||
3808 | // was visible. | ||||||
3809 | QualType Merged = Context.mergeTypes(Old->getType(), New->getType()); | ||||||
3810 | if (!Merged.isNull() && MergeTypeWithOld) | ||||||
3811 | New->setType(Merged); | ||||||
3812 | |||||||
3813 | return false; | ||||||
3814 | } | ||||||
3815 | |||||||
3816 | void Sema::mergeObjCMethodDecls(ObjCMethodDecl *newMethod, | ||||||
3817 | ObjCMethodDecl *oldMethod) { | ||||||
3818 | // Merge the attributes, including deprecated/unavailable | ||||||
3819 | AvailabilityMergeKind MergeKind = | ||||||
3820 | isa<ObjCProtocolDecl>(oldMethod->getDeclContext()) | ||||||
3821 | ? AMK_ProtocolImplementation | ||||||
3822 | : isa<ObjCImplDecl>(newMethod->getDeclContext()) ? AMK_Redeclaration | ||||||
3823 | : AMK_Override; | ||||||
3824 | |||||||
3825 | mergeDeclAttributes(newMethod, oldMethod, MergeKind); | ||||||
3826 | |||||||
3827 | // Merge attributes from the parameters. | ||||||
3828 | ObjCMethodDecl::param_const_iterator oi = oldMethod->param_begin(), | ||||||
3829 | oe = oldMethod->param_end(); | ||||||
3830 | for (ObjCMethodDecl::param_iterator | ||||||
3831 | ni = newMethod->param_begin(), ne = newMethod->param_end(); | ||||||
3832 | ni != ne && oi != oe; ++ni, ++oi) | ||||||
3833 | mergeParamDeclAttributes(*ni, *oi, *this); | ||||||
3834 | |||||||
3835 | CheckObjCMethodOverride(newMethod, oldMethod); | ||||||
3836 | } | ||||||
3837 | |||||||
3838 | static void diagnoseVarDeclTypeMismatch(Sema &S, VarDecl *New, VarDecl* Old) { | ||||||
3839 | assert(!S.Context.hasSameType(New->getType(), Old->getType()))((!S.Context.hasSameType(New->getType(), Old->getType() )) ? static_cast<void> (0) : __assert_fail ("!S.Context.hasSameType(New->getType(), Old->getType())" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 3839, __PRETTY_FUNCTION__)); | ||||||
3840 | |||||||
3841 | S.Diag(New->getLocation(), New->isThisDeclarationADefinition() | ||||||
3842 | ? diag::err_redefinition_different_type | ||||||
3843 | : diag::err_redeclaration_different_type) | ||||||
3844 | << New->getDeclName() << New->getType() << Old->getType(); | ||||||
3845 | |||||||
3846 | diag::kind PrevDiag; | ||||||
3847 | SourceLocation OldLocation; | ||||||
3848 | std::tie(PrevDiag, OldLocation) | ||||||
3849 | = getNoteDiagForInvalidRedeclaration(Old, New); | ||||||
3850 | S.Diag(OldLocation, PrevDiag); | ||||||
3851 | New->setInvalidDecl(); | ||||||
3852 | } | ||||||
3853 | |||||||
3854 | /// MergeVarDeclTypes - We parsed a variable 'New' which has the same name and | ||||||
3855 | /// scope as a previous declaration 'Old'. Figure out how to merge their types, | ||||||
3856 | /// emitting diagnostics as appropriate. | ||||||
3857 | /// | ||||||
3858 | /// Declarations using the auto type specifier (C++ [decl.spec.auto]) call back | ||||||
3859 | /// to here in AddInitializerToDecl. We can't check them before the initializer | ||||||
3860 | /// is attached. | ||||||
3861 | void Sema::MergeVarDeclTypes(VarDecl *New, VarDecl *Old, | ||||||
3862 | bool MergeTypeWithOld) { | ||||||
3863 | if (New->isInvalidDecl() || Old->isInvalidDecl()) | ||||||
3864 | return; | ||||||
3865 | |||||||
3866 | QualType MergedT; | ||||||
3867 | if (getLangOpts().CPlusPlus) { | ||||||
3868 | if (New->getType()->isUndeducedType()) { | ||||||
3869 | // We don't know what the new type is until the initializer is attached. | ||||||
3870 | return; | ||||||
3871 | } else if (Context.hasSameType(New->getType(), Old->getType())) { | ||||||
3872 | // These could still be something that needs exception specs checked. | ||||||
3873 | return MergeVarDeclExceptionSpecs(New, Old); | ||||||
3874 | } | ||||||
3875 | // C++ [basic.link]p10: | ||||||
3876 | // [...] the types specified by all declarations referring to a given | ||||||
3877 | // object or function shall be identical, except that declarations for an | ||||||
3878 | // array object can specify array types that differ by the presence or | ||||||
3879 | // absence of a major array bound (8.3.4). | ||||||
3880 | else if (Old->getType()->isArrayType() && New->getType()->isArrayType()) { | ||||||
3881 | const ArrayType *OldArray = Context.getAsArrayType(Old->getType()); | ||||||
3882 | const ArrayType *NewArray = Context.getAsArrayType(New->getType()); | ||||||
3883 | |||||||
3884 | // We are merging a variable declaration New into Old. If it has an array | ||||||
3885 | // bound, and that bound differs from Old's bound, we should diagnose the | ||||||
3886 | // mismatch. | ||||||
3887 | if (!NewArray->isIncompleteArrayType() && !NewArray->isDependentType()) { | ||||||
3888 | for (VarDecl *PrevVD = Old->getMostRecentDecl(); PrevVD; | ||||||
3889 | PrevVD = PrevVD->getPreviousDecl()) { | ||||||
3890 | const ArrayType *PrevVDTy = Context.getAsArrayType(PrevVD->getType()); | ||||||
3891 | if (PrevVDTy->isIncompleteArrayType() || PrevVDTy->isDependentType()) | ||||||
3892 | continue; | ||||||
3893 | |||||||
3894 | if (!Context.hasSameType(NewArray, PrevVDTy)) | ||||||
3895 | return diagnoseVarDeclTypeMismatch(*this, New, PrevVD); | ||||||
3896 | } | ||||||
3897 | } | ||||||
3898 | |||||||
3899 | if (OldArray->isIncompleteArrayType() && NewArray->isArrayType()) { | ||||||
3900 | if (Context.hasSameType(OldArray->getElementType(), | ||||||
3901 | NewArray->getElementType())) | ||||||
3902 | MergedT = New->getType(); | ||||||
3903 | } | ||||||
3904 | // FIXME: Check visibility. New is hidden but has a complete type. If New | ||||||
3905 | // has no array bound, it should not inherit one from Old, if Old is not | ||||||
3906 | // visible. | ||||||
3907 | else if (OldArray->isArrayType() && NewArray->isIncompleteArrayType()) { | ||||||
3908 | if (Context.hasSameType(OldArray->getElementType(), | ||||||
3909 | NewArray->getElementType())) | ||||||
3910 | MergedT = Old->getType(); | ||||||
3911 | } | ||||||
3912 | } | ||||||
3913 | else if (New->getType()->isObjCObjectPointerType() && | ||||||
3914 | Old->getType()->isObjCObjectPointerType()) { | ||||||
3915 | MergedT = Context.mergeObjCGCQualifiers(New->getType(), | ||||||
3916 | Old->getType()); | ||||||
3917 | } | ||||||
3918 | } else { | ||||||
3919 | // C 6.2.7p2: | ||||||
3920 | // All declarations that refer to the same object or function shall have | ||||||
3921 | // compatible type. | ||||||
3922 | MergedT = Context.mergeTypes(New->getType(), Old->getType()); | ||||||
3923 | } | ||||||
3924 | if (MergedT.isNull()) { | ||||||
3925 | // It's OK if we couldn't merge types if either type is dependent, for a | ||||||
3926 | // block-scope variable. In other cases (static data members of class | ||||||
3927 | // templates, variable templates, ...), we require the types to be | ||||||
3928 | // equivalent. | ||||||
3929 | // FIXME: The C++ standard doesn't say anything about this. | ||||||
3930 | if ((New->getType()->isDependentType() || | ||||||
3931 | Old->getType()->isDependentType()) && New->isLocalVarDecl()) { | ||||||
3932 | // If the old type was dependent, we can't merge with it, so the new type | ||||||
3933 | // becomes dependent for now. We'll reproduce the original type when we | ||||||
3934 | // instantiate the TypeSourceInfo for the variable. | ||||||
3935 | if (!New->getType()->isDependentType() && MergeTypeWithOld) | ||||||
3936 | New->setType(Context.DependentTy); | ||||||
3937 | return; | ||||||
3938 | } | ||||||
3939 | return diagnoseVarDeclTypeMismatch(*this, New, Old); | ||||||
3940 | } | ||||||
3941 | |||||||
3942 | // Don't actually update the type on the new declaration if the old | ||||||
3943 | // declaration was an extern declaration in a different scope. | ||||||
3944 | if (MergeTypeWithOld) | ||||||
3945 | New->setType(MergedT); | ||||||
3946 | } | ||||||
3947 | |||||||
3948 | static bool mergeTypeWithPrevious(Sema &S, VarDecl *NewVD, VarDecl *OldVD, | ||||||
3949 | LookupResult &Previous) { | ||||||
3950 | // C11 6.2.7p4: | ||||||
3951 | // For an identifier with internal or external linkage declared | ||||||
3952 | // in a scope in which a prior declaration of that identifier is | ||||||
3953 | // visible, if the prior declaration specifies internal or | ||||||
3954 | // external linkage, the type of the identifier at the later | ||||||
3955 | // declaration becomes the composite type. | ||||||
3956 | // | ||||||
3957 | // If the variable isn't visible, we do not merge with its type. | ||||||
3958 | if (Previous.isShadowed()) | ||||||
3959 | return false; | ||||||
3960 | |||||||
3961 | if (S.getLangOpts().CPlusPlus) { | ||||||
3962 | // C++11 [dcl.array]p3: | ||||||
3963 | // If there is a preceding declaration of the entity in the same | ||||||
3964 | // scope in which the bound was specified, an omitted array bound | ||||||
3965 | // is taken to be the same as in that earlier declaration. | ||||||
3966 | return NewVD->isPreviousDeclInSameBlockScope() || | ||||||
3967 | (!OldVD->getLexicalDeclContext()->isFunctionOrMethod() && | ||||||
3968 | !NewVD->getLexicalDeclContext()->isFunctionOrMethod()); | ||||||
3969 | } else { | ||||||
3970 | // If the old declaration was function-local, don't merge with its | ||||||
3971 | // type unless we're in the same function. | ||||||
3972 | return !OldVD->getLexicalDeclContext()->isFunctionOrMethod() || | ||||||
3973 | OldVD->getLexicalDeclContext() == NewVD->getLexicalDeclContext(); | ||||||
3974 | } | ||||||
3975 | } | ||||||
3976 | |||||||
3977 | /// MergeVarDecl - We just parsed a variable 'New' which has the same name | ||||||
3978 | /// and scope as a previous declaration 'Old'. Figure out how to resolve this | ||||||
3979 | /// situation, merging decls or emitting diagnostics as appropriate. | ||||||
3980 | /// | ||||||
3981 | /// Tentative definition rules (C99 6.9.2p2) are checked by | ||||||
3982 | /// FinalizeDeclaratorGroup. Unfortunately, we can't analyze tentative | ||||||
3983 | /// definitions here, since the initializer hasn't been attached. | ||||||
3984 | /// | ||||||
3985 | void Sema::MergeVarDecl(VarDecl *New, LookupResult &Previous) { | ||||||
3986 | // If the new decl is already invalid, don't do any other checking. | ||||||
3987 | if (New->isInvalidDecl()) | ||||||
3988 | return; | ||||||
3989 | |||||||
3990 | if (!shouldLinkPossiblyHiddenDecl(Previous, New)) | ||||||
3991 | return; | ||||||
3992 | |||||||
3993 | VarTemplateDecl *NewTemplate = New->getDescribedVarTemplate(); | ||||||
3994 | |||||||
3995 | // Verify the old decl was also a variable or variable template. | ||||||
3996 | VarDecl *Old = nullptr; | ||||||
3997 | VarTemplateDecl *OldTemplate = nullptr; | ||||||
3998 | if (Previous.isSingleResult()) { | ||||||
3999 | if (NewTemplate) { | ||||||
4000 | OldTemplate = dyn_cast<VarTemplateDecl>(Previous.getFoundDecl()); | ||||||
4001 | Old = OldTemplate ? OldTemplate->getTemplatedDecl() : nullptr; | ||||||
4002 | |||||||
4003 | if (auto *Shadow = | ||||||
4004 | dyn_cast<UsingShadowDecl>(Previous.getRepresentativeDecl())) | ||||||
4005 | if (checkUsingShadowRedecl<VarTemplateDecl>(*this, Shadow, NewTemplate)) | ||||||
4006 | return New->setInvalidDecl(); | ||||||
4007 | } else { | ||||||
4008 | Old = dyn_cast<VarDecl>(Previous.getFoundDecl()); | ||||||
4009 | |||||||
4010 | if (auto *Shadow = | ||||||
4011 | dyn_cast<UsingShadowDecl>(Previous.getRepresentativeDecl())) | ||||||
4012 | if (checkUsingShadowRedecl<VarDecl>(*this, Shadow, New)) | ||||||
4013 | return New->setInvalidDecl(); | ||||||
4014 | } | ||||||
4015 | } | ||||||
4016 | if (!Old) { | ||||||
4017 | Diag(New->getLocation(), diag::err_redefinition_different_kind) | ||||||
4018 | << New->getDeclName(); | ||||||
4019 | notePreviousDefinition(Previous.getRepresentativeDecl(), | ||||||
4020 | New->getLocation()); | ||||||
4021 | return New->setInvalidDecl(); | ||||||
4022 | } | ||||||
4023 | |||||||
4024 | // Ensure the template parameters are compatible. | ||||||
4025 | if (NewTemplate && | ||||||
4026 | !TemplateParameterListsAreEqual(NewTemplate->getTemplateParameters(), | ||||||
4027 | OldTemplate->getTemplateParameters(), | ||||||
4028 | /*Complain=*/true, TPL_TemplateMatch)) | ||||||
4029 | return New->setInvalidDecl(); | ||||||
4030 | |||||||
4031 | // C++ [class.mem]p1: | ||||||
4032 | // A member shall not be declared twice in the member-specification [...] | ||||||
4033 | // | ||||||
4034 | // Here, we need only consider static data members. | ||||||
4035 | if (Old->isStaticDataMember() && !New->isOutOfLine()) { | ||||||
4036 | Diag(New->getLocation(), diag::err_duplicate_member) | ||||||
4037 | << New->getIdentifier(); | ||||||
4038 | Diag(Old->getLocation(), diag::note_previous_declaration); | ||||||
4039 | New->setInvalidDecl(); | ||||||
4040 | } | ||||||
4041 | |||||||
4042 | mergeDeclAttributes(New, Old); | ||||||
4043 | // Warn if an already-declared variable is made a weak_import in a subsequent | ||||||
4044 | // declaration | ||||||
4045 | if (New->hasAttr<WeakImportAttr>() && | ||||||
4046 | Old->getStorageClass() == SC_None && | ||||||
4047 | !Old->hasAttr<WeakImportAttr>()) { | ||||||
4048 | Diag(New->getLocation(), diag::warn_weak_import) << New->getDeclName(); | ||||||
4049 | notePreviousDefinition(Old, New->getLocation()); | ||||||
4050 | // Remove weak_import attribute on new declaration. | ||||||
4051 | New->dropAttr<WeakImportAttr>(); | ||||||
4052 | } | ||||||
4053 | |||||||
4054 | if (New->hasAttr<InternalLinkageAttr>() && | ||||||
4055 | !Old->hasAttr<InternalLinkageAttr>()) { | ||||||
4056 | Diag(New->getLocation(), diag::err_internal_linkage_redeclaration) | ||||||
4057 | << New->getDeclName(); | ||||||
4058 | notePreviousDefinition(Old, New->getLocation()); | ||||||
4059 | New->dropAttr<InternalLinkageAttr>(); | ||||||
4060 | } | ||||||
4061 | |||||||
4062 | // Merge the types. | ||||||
4063 | VarDecl *MostRecent = Old->getMostRecentDecl(); | ||||||
4064 | if (MostRecent != Old) { | ||||||
4065 | MergeVarDeclTypes(New, MostRecent, | ||||||
4066 | mergeTypeWithPrevious(*this, New, MostRecent, Previous)); | ||||||
4067 | if (New->isInvalidDecl()) | ||||||
4068 | return; | ||||||
4069 | } | ||||||
4070 | |||||||
4071 | MergeVarDeclTypes(New, Old, mergeTypeWithPrevious(*this, New, Old, Previous)); | ||||||
4072 | if (New->isInvalidDecl()) | ||||||
4073 | return; | ||||||
4074 | |||||||
4075 | diag::kind PrevDiag; | ||||||
4076 | SourceLocation OldLocation; | ||||||
4077 | std::tie(PrevDiag, OldLocation) = | ||||||
4078 | getNoteDiagForInvalidRedeclaration(Old, New); | ||||||
4079 | |||||||
4080 | // [dcl.stc]p8: Check if we have a non-static decl followed by a static. | ||||||
4081 | if (New->getStorageClass() == SC_Static && | ||||||
4082 | !New->isStaticDataMember() && | ||||||
4083 | Old->hasExternalFormalLinkage()) { | ||||||
4084 | if (getLangOpts().MicrosoftExt) { | ||||||
4085 | Diag(New->getLocation(), diag::ext_static_non_static) | ||||||
4086 | << New->getDeclName(); | ||||||
4087 | Diag(OldLocation, PrevDiag); | ||||||
4088 | } else { | ||||||
4089 | Diag(New->getLocation(), diag::err_static_non_static) | ||||||
4090 | << New->getDeclName(); | ||||||
4091 | Diag(OldLocation, PrevDiag); | ||||||
4092 | return New->setInvalidDecl(); | ||||||
4093 | } | ||||||
4094 | } | ||||||
4095 | // C99 6.2.2p4: | ||||||
4096 | // For an identifier declared with the storage-class specifier | ||||||
4097 | // extern in a scope in which a prior declaration of that | ||||||
4098 | // identifier is visible,23) if the prior declaration specifies | ||||||
4099 | // internal or external linkage, the linkage of the identifier at | ||||||
4100 | // the later declaration is the same as the linkage specified at | ||||||
4101 | // the prior declaration. If no prior declaration is visible, or | ||||||
4102 | // if the prior declaration specifies no linkage, then the | ||||||
4103 | // identifier has external linkage. | ||||||
4104 | if (New->hasExternalStorage() && Old->hasLinkage()) | ||||||
4105 | /* Okay */; | ||||||
4106 | else if (New->getCanonicalDecl()->getStorageClass() != SC_Static && | ||||||
4107 | !New->isStaticDataMember() && | ||||||
4108 | Old->getCanonicalDecl()->getStorageClass() == SC_Static) { | ||||||
4109 | Diag(New->getLocation(), diag::err_non_static_static) << New->getDeclName(); | ||||||
4110 | Diag(OldLocation, PrevDiag); | ||||||
4111 | return New->setInvalidDecl(); | ||||||
4112 | } | ||||||
4113 | |||||||
4114 | // Check if extern is followed by non-extern and vice-versa. | ||||||
4115 | if (New->hasExternalStorage() && | ||||||
4116 | !Old->hasLinkage() && Old->isLocalVarDeclOrParm()) { | ||||||
4117 | Diag(New->getLocation(), diag::err_extern_non_extern) << New->getDeclName(); | ||||||
4118 | Diag(OldLocation, PrevDiag); | ||||||
4119 | return New->setInvalidDecl(); | ||||||
4120 | } | ||||||
4121 | if (Old->hasLinkage() && New->isLocalVarDeclOrParm() && | ||||||
4122 | !New->hasExternalStorage()) { | ||||||
4123 | Diag(New->getLocation(), diag::err_non_extern_extern) << New->getDeclName(); | ||||||
4124 | Diag(OldLocation, PrevDiag); | ||||||
4125 | return New->setInvalidDecl(); | ||||||
4126 | } | ||||||
4127 | |||||||
4128 | if (CheckRedeclarationModuleOwnership(New, Old)) | ||||||
4129 | return; | ||||||
4130 | |||||||
4131 | // Variables with external linkage are analyzed in FinalizeDeclaratorGroup. | ||||||
4132 | |||||||
4133 | // FIXME: The test for external storage here seems wrong? We still | ||||||
4134 | // need to check for mismatches. | ||||||
4135 | if (!New->hasExternalStorage() && !New->isFileVarDecl() && | ||||||
4136 | // Don't complain about out-of-line definitions of static members. | ||||||
4137 | !(Old->getLexicalDeclContext()->isRecord() && | ||||||
4138 | !New->getLexicalDeclContext()->isRecord())) { | ||||||
4139 | Diag(New->getLocation(), diag::err_redefinition) << New->getDeclName(); | ||||||
4140 | Diag(OldLocation, PrevDiag); | ||||||
4141 | return New->setInvalidDecl(); | ||||||
4142 | } | ||||||
4143 | |||||||
4144 | if (New->isInline() && !Old->getMostRecentDecl()->isInline()) { | ||||||
4145 | if (VarDecl *Def = Old->getDefinition()) { | ||||||
4146 | // C++1z [dcl.fcn.spec]p4: | ||||||
4147 | // If the definition of a variable appears in a translation unit before | ||||||
4148 | // its first declaration as inline, the program is ill-formed. | ||||||
4149 | Diag(New->getLocation(), diag::err_inline_decl_follows_def) << New; | ||||||
4150 | Diag(Def->getLocation(), diag::note_previous_definition); | ||||||
4151 | } | ||||||
4152 | } | ||||||
4153 | |||||||
4154 | // If this redeclaration makes the variable inline, we may need to add it to | ||||||
4155 | // UndefinedButUsed. | ||||||
4156 | if (!Old->isInline() && New->isInline() && Old->isUsed(false) && | ||||||
4157 | !Old->getDefinition() && !New->isThisDeclarationADefinition()) | ||||||
4158 | UndefinedButUsed.insert(std::make_pair(Old->getCanonicalDecl(), | ||||||
4159 | SourceLocation())); | ||||||
4160 | |||||||
4161 | if (New->getTLSKind() != Old->getTLSKind()) { | ||||||
4162 | if (!Old->getTLSKind()) { | ||||||
4163 | Diag(New->getLocation(), diag::err_thread_non_thread) << New->getDeclName(); | ||||||
4164 | Diag(OldLocation, PrevDiag); | ||||||
4165 | } else if (!New->getTLSKind()) { | ||||||
4166 | Diag(New->getLocation(), diag::err_non_thread_thread) << New->getDeclName(); | ||||||
4167 | Diag(OldLocation, PrevDiag); | ||||||
4168 | } else { | ||||||
4169 | // Do not allow redeclaration to change the variable between requiring | ||||||
4170 | // static and dynamic initialization. | ||||||
4171 | // FIXME: GCC allows this, but uses the TLS keyword on the first | ||||||
4172 | // declaration to determine the kind. Do we need to be compatible here? | ||||||
4173 | Diag(New->getLocation(), diag::err_thread_thread_different_kind) | ||||||
4174 | << New->getDeclName() << (New->getTLSKind() == VarDecl::TLS_Dynamic); | ||||||
4175 | Diag(OldLocation, PrevDiag); | ||||||
4176 | } | ||||||
4177 | } | ||||||
4178 | |||||||
4179 | // C++ doesn't have tentative definitions, so go right ahead and check here. | ||||||
4180 | if (getLangOpts().CPlusPlus && | ||||||
4181 | New->isThisDeclarationADefinition() == VarDecl::Definition) { | ||||||
4182 | if (Old->isStaticDataMember() && Old->getCanonicalDecl()->isInline() && | ||||||
4183 | Old->getCanonicalDecl()->isConstexpr()) { | ||||||
4184 | // This definition won't be a definition any more once it's been merged. | ||||||
4185 | Diag(New->getLocation(), | ||||||
4186 | diag::warn_deprecated_redundant_constexpr_static_def); | ||||||
4187 | } else if (VarDecl *Def = Old->getDefinition()) { | ||||||
4188 | if (checkVarDeclRedefinition(Def, New)) | ||||||
4189 | return; | ||||||
4190 | } | ||||||
4191 | } | ||||||
4192 | |||||||
4193 | if (haveIncompatibleLanguageLinkages(Old, New)) { | ||||||
4194 | Diag(New->getLocation(), diag::err_different_language_linkage) << New; | ||||||
4195 | Diag(OldLocation, PrevDiag); | ||||||
4196 | New->setInvalidDecl(); | ||||||
4197 | return; | ||||||
4198 | } | ||||||
4199 | |||||||
4200 | // Merge "used" flag. | ||||||
4201 | if (Old->getMostRecentDecl()->isUsed(false)) | ||||||
4202 | New->setIsUsed(); | ||||||
4203 | |||||||
4204 | // Keep a chain of previous declarations. | ||||||
4205 | New->setPreviousDecl(Old); | ||||||
4206 | if (NewTemplate) | ||||||
4207 | NewTemplate->setPreviousDecl(OldTemplate); | ||||||
4208 | adjustDeclContextForDeclaratorDecl(New, Old); | ||||||
4209 | |||||||
4210 | // Inherit access appropriately. | ||||||
4211 | New->setAccess(Old->getAccess()); | ||||||
4212 | if (NewTemplate) | ||||||
4213 | NewTemplate->setAccess(New->getAccess()); | ||||||
4214 | |||||||
4215 | if (Old->isInline()) | ||||||
4216 | New->setImplicitlyInline(); | ||||||
4217 | } | ||||||
4218 | |||||||
4219 | void Sema::notePreviousDefinition(const NamedDecl *Old, SourceLocation New) { | ||||||
4220 | SourceManager &SrcMgr = getSourceManager(); | ||||||
4221 | auto FNewDecLoc = SrcMgr.getDecomposedLoc(New); | ||||||
4222 | auto FOldDecLoc = SrcMgr.getDecomposedLoc(Old->getLocation()); | ||||||
4223 | auto *FNew = SrcMgr.getFileEntryForID(FNewDecLoc.first); | ||||||
4224 | auto *FOld = SrcMgr.getFileEntryForID(FOldDecLoc.first); | ||||||
4225 | auto &HSI = PP.getHeaderSearchInfo(); | ||||||
4226 | StringRef HdrFilename = | ||||||
4227 | SrcMgr.getFilename(SrcMgr.getSpellingLoc(Old->getLocation())); | ||||||
4228 | |||||||
4229 | auto noteFromModuleOrInclude = [&](Module *Mod, | ||||||
4230 | SourceLocation IncLoc) -> bool { | ||||||
4231 | // Redefinition errors with modules are common with non modular mapped | ||||||
4232 | // headers, example: a non-modular header H in module A that also gets | ||||||
4233 | // included directly in a TU. Pointing twice to the same header/definition | ||||||
4234 | // is confusing, try to get better diagnostics when modules is on. | ||||||
4235 | if (IncLoc.isValid()) { | ||||||
4236 | if (Mod) { | ||||||
4237 | Diag(IncLoc, diag::note_redefinition_modules_same_file) | ||||||
4238 | << HdrFilename.str() << Mod->getFullModuleName(); | ||||||
4239 | if (!Mod->DefinitionLoc.isInvalid()) | ||||||
4240 | Diag(Mod->DefinitionLoc, diag::note_defined_here) | ||||||
4241 | << Mod->getFullModuleName(); | ||||||
4242 | } else { | ||||||
4243 | Diag(IncLoc, diag::note_redefinition_include_same_file) | ||||||
4244 | << HdrFilename.str(); | ||||||
4245 | } | ||||||
4246 | return true; | ||||||
4247 | } | ||||||
4248 | |||||||
4249 | return false; | ||||||
4250 | }; | ||||||
4251 | |||||||
4252 | // Is it the same file and same offset? Provide more information on why | ||||||
4253 | // this leads to a redefinition error. | ||||||
4254 | if (FNew == FOld && FNewDecLoc.second == FOldDecLoc.second) { | ||||||
4255 | SourceLocation OldIncLoc = SrcMgr.getIncludeLoc(FOldDecLoc.first); | ||||||
4256 | SourceLocation NewIncLoc = SrcMgr.getIncludeLoc(FNewDecLoc.first); | ||||||
4257 | bool EmittedDiag = | ||||||
4258 | noteFromModuleOrInclude(Old->getOwningModule(), OldIncLoc); | ||||||
4259 | EmittedDiag |= noteFromModuleOrInclude(getCurrentModule(), NewIncLoc); | ||||||
4260 | |||||||
4261 | // If the header has no guards, emit a note suggesting one. | ||||||
4262 | if (FOld && !HSI.isFileMultipleIncludeGuarded(FOld)) | ||||||
4263 | Diag(Old->getLocation(), diag::note_use_ifdef_guards); | ||||||
4264 | |||||||
4265 | if (EmittedDiag) | ||||||
4266 | return; | ||||||
4267 | } | ||||||
4268 | |||||||
4269 | // Redefinition coming from different files or couldn't do better above. | ||||||
4270 | if (Old->getLocation().isValid()) | ||||||
4271 | Diag(Old->getLocation(), diag::note_previous_definition); | ||||||
4272 | } | ||||||
4273 | |||||||
4274 | /// We've just determined that \p Old and \p New both appear to be definitions | ||||||
4275 | /// of the same variable. Either diagnose or fix the problem. | ||||||
4276 | bool Sema::checkVarDeclRedefinition(VarDecl *Old, VarDecl *New) { | ||||||
4277 | if (!hasVisibleDefinition(Old) && | ||||||
4278 | (New->getFormalLinkage() == InternalLinkage || | ||||||
4279 | New->isInline() || | ||||||
4280 | New->getDescribedVarTemplate() || | ||||||
4281 | New->getNumTemplateParameterLists() || | ||||||
4282 | New->getDeclContext()->isDependentContext())) { | ||||||
4283 | // The previous definition is hidden, and multiple definitions are | ||||||
4284 | // permitted (in separate TUs). Demote this to a declaration. | ||||||
4285 | New->demoteThisDefinitionToDeclaration(); | ||||||
4286 | |||||||
4287 | // Make the canonical definition visible. | ||||||
4288 | if (auto *OldTD = Old->getDescribedVarTemplate()) | ||||||
4289 | makeMergedDefinitionVisible(OldTD); | ||||||
4290 | makeMergedDefinitionVisible(Old); | ||||||
4291 | return false; | ||||||
4292 | } else { | ||||||
4293 | Diag(New->getLocation(), diag::err_redefinition) << New; | ||||||
4294 | notePreviousDefinition(Old, New->getLocation()); | ||||||
4295 | New->setInvalidDecl(); | ||||||
4296 | return true; | ||||||
4297 | } | ||||||
4298 | } | ||||||
4299 | |||||||
4300 | /// ParsedFreeStandingDeclSpec - This method is invoked when a declspec with | ||||||
4301 | /// no declarator (e.g. "struct foo;") is parsed. | ||||||
4302 | Decl * | ||||||
4303 | Sema::ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, DeclSpec &DS, | ||||||
4304 | RecordDecl *&AnonRecord) { | ||||||
4305 | return ParsedFreeStandingDeclSpec(S, AS, DS, MultiTemplateParamsArg(), false, | ||||||
4306 | AnonRecord); | ||||||
4307 | } | ||||||
4308 | |||||||
4309 | // The MS ABI changed between VS2013 and VS2015 with regard to numbers used to | ||||||
4310 | // disambiguate entities defined in different scopes. | ||||||
4311 | // While the VS2015 ABI fixes potential miscompiles, it is also breaks | ||||||
4312 | // compatibility. | ||||||
4313 | // We will pick our mangling number depending on which version of MSVC is being | ||||||
4314 | // targeted. | ||||||
4315 | static unsigned getMSManglingNumber(const LangOptions &LO, Scope *S) { | ||||||
4316 | return LO.isCompatibleWithMSVC(LangOptions::MSVC2015) | ||||||
4317 | ? S->getMSCurManglingNumber() | ||||||
4318 | : S->getMSLastManglingNumber(); | ||||||
4319 | } | ||||||
4320 | |||||||
4321 | void Sema::handleTagNumbering(const TagDecl *Tag, Scope *TagScope) { | ||||||
4322 | if (!Context.getLangOpts().CPlusPlus) | ||||||
4323 | return; | ||||||
4324 | |||||||
4325 | if (isa<CXXRecordDecl>(Tag->getParent())) { | ||||||
4326 | // If this tag is the direct child of a class, number it if | ||||||
4327 | // it is anonymous. | ||||||
4328 | if (!Tag->getName().empty() || Tag->getTypedefNameForAnonDecl()) | ||||||
4329 | return; | ||||||
4330 | MangleNumberingContext &MCtx = | ||||||
4331 | Context.getManglingNumberContext(Tag->getParent()); | ||||||
4332 | Context.setManglingNumber( | ||||||
4333 | Tag, MCtx.getManglingNumber( | ||||||
4334 | Tag, getMSManglingNumber(getLangOpts(), TagScope))); | ||||||
4335 | return; | ||||||
4336 | } | ||||||
4337 | |||||||
4338 | // If this tag isn't a direct child of a class, number it if it is local. | ||||||
4339 | MangleNumberingContext *MCtx; | ||||||
4340 | Decl *ManglingContextDecl; | ||||||
4341 | std::tie(MCtx, ManglingContextDecl) = | ||||||
4342 | getCurrentMangleNumberContext(Tag->getDeclContext()); | ||||||
4343 | if (MCtx) { | ||||||
4344 | Context.setManglingNumber( | ||||||
4345 | Tag, MCtx->getManglingNumber( | ||||||
4346 | Tag, getMSManglingNumber(getLangOpts(), TagScope))); | ||||||
4347 | } | ||||||
4348 | } | ||||||
4349 | |||||||
4350 | namespace { | ||||||
4351 | struct NonCLikeKind { | ||||||
4352 | enum { | ||||||
4353 | None, | ||||||
4354 | BaseClass, | ||||||
4355 | DefaultMemberInit, | ||||||
4356 | Lambda, | ||||||
4357 | Friend, | ||||||
4358 | OtherMember, | ||||||
4359 | Invalid, | ||||||
4360 | } Kind = None; | ||||||
4361 | SourceRange Range; | ||||||
4362 | |||||||
4363 | explicit operator bool() { return Kind != None; } | ||||||
4364 | }; | ||||||
4365 | } | ||||||
4366 | |||||||
4367 | /// Determine whether a class is C-like, according to the rules of C++ | ||||||
4368 | /// [dcl.typedef] for anonymous classes with typedef names for linkage. | ||||||
4369 | static NonCLikeKind getNonCLikeKindForAnonymousStruct(const CXXRecordDecl *RD) { | ||||||
4370 | if (RD->isInvalidDecl()) | ||||||
4371 | return {NonCLikeKind::Invalid, {}}; | ||||||
4372 | |||||||
4373 | // C++ [dcl.typedef]p9: [P1766R1] | ||||||
4374 | // An unnamed class with a typedef name for linkage purposes shall not | ||||||
4375 | // | ||||||
4376 | // -- have any base classes | ||||||
4377 | if (RD->getNumBases()) | ||||||
4378 | return {NonCLikeKind::BaseClass, | ||||||
4379 | SourceRange(RD->bases_begin()->getBeginLoc(), | ||||||
4380 | RD->bases_end()[-1].getEndLoc())}; | ||||||
4381 | bool Invalid = false; | ||||||
4382 | for (Decl *D : RD->decls()) { | ||||||
4383 | // Don't complain about things we already diagnosed. | ||||||
4384 | if (D->isInvalidDecl()) { | ||||||
4385 | Invalid = true; | ||||||
4386 | continue; | ||||||
4387 | } | ||||||
4388 | |||||||
4389 | // -- have any [...] default member initializers | ||||||
4390 | if (auto *FD = dyn_cast<FieldDecl>(D)) { | ||||||
4391 | if (FD->hasInClassInitializer()) { | ||||||
4392 | auto *Init = FD->getInClassInitializer(); | ||||||
4393 | return {NonCLikeKind::DefaultMemberInit, | ||||||
4394 | Init ? Init->getSourceRange() : D->getSourceRange()}; | ||||||
4395 | } | ||||||
4396 | continue; | ||||||
4397 | } | ||||||
4398 | |||||||
4399 | // FIXME: We don't allow friend declarations. This violates the wording of | ||||||
4400 | // P1766, but not the intent. | ||||||
4401 | if (isa<FriendDecl>(D)) | ||||||
4402 | return {NonCLikeKind::Friend, D->getSourceRange()}; | ||||||
4403 | |||||||
4404 | // -- declare any members other than non-static data members, member | ||||||
4405 | // enumerations, or member classes, | ||||||
4406 | if (isa<StaticAssertDecl>(D) || isa<IndirectFieldDecl>(D) || | ||||||
4407 | isa<EnumDecl>(D)) | ||||||
4408 | continue; | ||||||
4409 | auto *MemberRD = dyn_cast<CXXRecordDecl>(D); | ||||||
4410 | if (!MemberRD) | ||||||
4411 | return {NonCLikeKind::OtherMember, D->getSourceRange()}; | ||||||
4412 | |||||||
4413 | // -- contain a lambda-expression, | ||||||
4414 | if (MemberRD->isLambda()) | ||||||
4415 | return {NonCLikeKind::Lambda, MemberRD->getSourceRange()}; | ||||||
4416 | |||||||
4417 | // and all member classes shall also satisfy these requirements | ||||||
4418 | // (recursively). | ||||||
4419 | if (MemberRD->isThisDeclarationADefinition()) { | ||||||
4420 | if (auto Kind = getNonCLikeKindForAnonymousStruct(MemberRD)) | ||||||
4421 | return Kind; | ||||||
4422 | } | ||||||
4423 | } | ||||||
4424 | |||||||
4425 | return {Invalid ? NonCLikeKind::Invalid : NonCLikeKind::None, {}}; | ||||||
4426 | } | ||||||
4427 | |||||||
4428 | void Sema::setTagNameForLinkagePurposes(TagDecl *TagFromDeclSpec, | ||||||
4429 | TypedefNameDecl *NewTD) { | ||||||
4430 | if (TagFromDeclSpec->isInvalidDecl()) | ||||||
4431 | return; | ||||||
4432 | |||||||
4433 | // Do nothing if the tag already has a name for linkage purposes. | ||||||
4434 | if (TagFromDeclSpec->hasNameForLinkage()) | ||||||
4435 | return; | ||||||
4436 | |||||||
4437 | // A well-formed anonymous tag must always be a TUK_Definition. | ||||||
4438 | assert(TagFromDeclSpec->isThisDeclarationADefinition())((TagFromDeclSpec->isThisDeclarationADefinition()) ? static_cast <void> (0) : __assert_fail ("TagFromDeclSpec->isThisDeclarationADefinition()" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 4438, __PRETTY_FUNCTION__)); | ||||||
4439 | |||||||
4440 | // The type must match the tag exactly; no qualifiers allowed. | ||||||
4441 | if (!Context.hasSameType(NewTD->getUnderlyingType(), | ||||||
4442 | Context.getTagDeclType(TagFromDeclSpec))) { | ||||||
4443 | if (getLangOpts().CPlusPlus) | ||||||
4444 | Context.addTypedefNameForUnnamedTagDecl(TagFromDeclSpec, NewTD); | ||||||
4445 | return; | ||||||
4446 | } | ||||||
4447 | |||||||
4448 | // C++ [dcl.typedef]p9: [P1766R1, applied as DR] | ||||||
4449 | // An unnamed class with a typedef name for linkage purposes shall [be | ||||||
4450 | // C-like]. | ||||||
4451 | // | ||||||
4452 | // FIXME: Also diagnose if we've already computed the linkage. That ideally | ||||||
4453 | // shouldn't happen, but there are constructs that the language rule doesn't | ||||||
4454 | // disallow for which we can't reasonably avoid computing linkage early. | ||||||
4455 | const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(TagFromDeclSpec); | ||||||
4456 | NonCLikeKind NonCLike = RD ? getNonCLikeKindForAnonymousStruct(RD) | ||||||
4457 | : NonCLikeKind(); | ||||||
4458 | bool ChangesLinkage = TagFromDeclSpec->hasLinkageBeenComputed(); | ||||||
4459 | if (NonCLike || ChangesLinkage) { | ||||||
4460 | if (NonCLike.Kind == NonCLikeKind::Invalid) | ||||||
4461 | return; | ||||||
4462 | |||||||
4463 | unsigned DiagID = diag::ext_non_c_like_anon_struct_in_typedef; | ||||||
4464 | if (ChangesLinkage) { | ||||||
4465 | // If the linkage changes, we can't accept this as an extension. | ||||||
4466 | if (NonCLike.Kind == NonCLikeKind::None) | ||||||
4467 | DiagID = diag::err_typedef_changes_linkage; | ||||||
4468 | else | ||||||
4469 | DiagID = diag::err_non_c_like_anon_struct_in_typedef; | ||||||
4470 | } | ||||||
4471 | |||||||
4472 | SourceLocation FixitLoc = | ||||||
4473 | getLocForEndOfToken(TagFromDeclSpec->getInnerLocStart()); | ||||||
4474 | llvm::SmallString<40> TextToInsert; | ||||||
4475 | TextToInsert += ' '; | ||||||
4476 | TextToInsert += NewTD->getIdentifier()->getName(); | ||||||
4477 | |||||||
4478 | Diag(FixitLoc, DiagID) | ||||||
4479 | << isa<TypeAliasDecl>(NewTD) | ||||||
4480 | << FixItHint::CreateInsertion(FixitLoc, TextToInsert); | ||||||
4481 | if (NonCLike.Kind != NonCLikeKind::None) { | ||||||
4482 | Diag(NonCLike.Range.getBegin(), diag::note_non_c_like_anon_struct) | ||||||
4483 | << NonCLike.Kind - 1 << NonCLike.Range; | ||||||
4484 | } | ||||||
4485 | Diag(NewTD->getLocation(), diag::note_typedef_for_linkage_here) | ||||||
4486 | << NewTD << isa<TypeAliasDecl>(NewTD); | ||||||
4487 | |||||||
4488 | if (ChangesLinkage) | ||||||
4489 | return; | ||||||
4490 | } | ||||||
4491 | |||||||
4492 | // Otherwise, set this as the anon-decl typedef for the tag. | ||||||
4493 | TagFromDeclSpec->setTypedefNameForAnonDecl(NewTD); | ||||||
4494 | } | ||||||
4495 | |||||||
4496 | static unsigned GetDiagnosticTypeSpecifierID(DeclSpec::TST T) { | ||||||
4497 | switch (T) { | ||||||
4498 | case DeclSpec::TST_class: | ||||||
4499 | return 0; | ||||||
4500 | case DeclSpec::TST_struct: | ||||||
4501 | return 1; | ||||||
4502 | case DeclSpec::TST_interface: | ||||||
4503 | return 2; | ||||||
4504 | case DeclSpec::TST_union: | ||||||
4505 | return 3; | ||||||
4506 | case DeclSpec::TST_enum: | ||||||
4507 | return 4; | ||||||
4508 | default: | ||||||
4509 | llvm_unreachable("unexpected type specifier")::llvm::llvm_unreachable_internal("unexpected type specifier" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 4509); | ||||||
4510 | } | ||||||
4511 | } | ||||||
4512 | |||||||
4513 | /// ParsedFreeStandingDeclSpec - This method is invoked when a declspec with | ||||||
4514 | /// no declarator (e.g. "struct foo;") is parsed. It also accepts template | ||||||
4515 | /// parameters to cope with template friend declarations. | ||||||
4516 | Decl * | ||||||
4517 | Sema::ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, DeclSpec &DS, | ||||||
4518 | MultiTemplateParamsArg TemplateParams, | ||||||
4519 | bool IsExplicitInstantiation, | ||||||
4520 | RecordDecl *&AnonRecord) { | ||||||
4521 | Decl *TagD = nullptr; | ||||||
4522 | TagDecl *Tag = nullptr; | ||||||
4523 | if (DS.getTypeSpecType() == DeclSpec::TST_class || | ||||||
4524 | DS.getTypeSpecType() == DeclSpec::TST_struct || | ||||||
4525 | DS.getTypeSpecType() == DeclSpec::TST_interface || | ||||||
4526 | DS.getTypeSpecType() == DeclSpec::TST_union || | ||||||
4527 | DS.getTypeSpecType() == DeclSpec::TST_enum) { | ||||||
4528 | TagD = DS.getRepAsDecl(); | ||||||
4529 | |||||||
4530 | if (!TagD) // We probably had an error | ||||||
4531 | return nullptr; | ||||||
4532 | |||||||
4533 | // Note that the above type specs guarantee that the | ||||||
4534 | // type rep is a Decl, whereas in many of the others | ||||||
4535 | // it's a Type. | ||||||
4536 | if (isa<TagDecl>(TagD)) | ||||||
4537 | Tag = cast<TagDecl>(TagD); | ||||||
4538 | else if (ClassTemplateDecl *CTD = dyn_cast<ClassTemplateDecl>(TagD)) | ||||||
4539 | Tag = CTD->getTemplatedDecl(); | ||||||
4540 | } | ||||||
4541 | |||||||
4542 | if (Tag) { | ||||||
4543 | handleTagNumbering(Tag, S); | ||||||
4544 | Tag->setFreeStanding(); | ||||||
4545 | if (Tag->isInvalidDecl()) | ||||||
4546 | return Tag; | ||||||
4547 | } | ||||||
4548 | |||||||
4549 | if (unsigned TypeQuals = DS.getTypeQualifiers()) { | ||||||
4550 | // Enforce C99 6.7.3p2: "Types other than pointer types derived from object | ||||||
4551 | // or incomplete types shall not be restrict-qualified." | ||||||
4552 | if (TypeQuals & DeclSpec::TQ_restrict) | ||||||
4553 | Diag(DS.getRestrictSpecLoc(), | ||||||
4554 | diag::err_typecheck_invalid_restrict_not_pointer_noarg) | ||||||
4555 | << DS.getSourceRange(); | ||||||
4556 | } | ||||||
4557 | |||||||
4558 | if (DS.isInlineSpecified()) | ||||||
4559 | Diag(DS.getInlineSpecLoc(), diag::err_inline_non_function) | ||||||
4560 | << getLangOpts().CPlusPlus17; | ||||||
4561 | |||||||
4562 | if (DS.hasConstexprSpecifier()) { | ||||||
4563 | // C++0x [dcl.constexpr]p1: constexpr can only be applied to declarations | ||||||
4564 | // and definitions of functions and variables. | ||||||
4565 | // C++2a [dcl.constexpr]p1: The consteval specifier shall be applied only to | ||||||
4566 | // the declaration of a function or function template | ||||||
4567 | if (Tag) | ||||||
4568 | Diag(DS.getConstexprSpecLoc(), diag::err_constexpr_tag) | ||||||
4569 | << GetDiagnosticTypeSpecifierID(DS.getTypeSpecType()) | ||||||
4570 | << DS.getConstexprSpecifier(); | ||||||
4571 | else | ||||||
4572 | Diag(DS.getConstexprSpecLoc(), diag::err_constexpr_wrong_decl_kind) | ||||||
4573 | << DS.getConstexprSpecifier(); | ||||||
4574 | // Don't emit warnings after this error. | ||||||
4575 | return TagD; | ||||||
4576 | } | ||||||
4577 | |||||||
4578 | DiagnoseFunctionSpecifiers(DS); | ||||||
4579 | |||||||
4580 | if (DS.isFriendSpecified()) { | ||||||
4581 | // If we're dealing with a decl but not a TagDecl, assume that | ||||||
4582 | // whatever routines created it handled the friendship aspect. | ||||||
4583 | if (TagD && !Tag) | ||||||
4584 | return nullptr; | ||||||
4585 | return ActOnFriendTypeDecl(S, DS, TemplateParams); | ||||||
4586 | } | ||||||
4587 | |||||||
4588 | const CXXScopeSpec &SS = DS.getTypeSpecScope(); | ||||||
4589 | bool IsExplicitSpecialization = | ||||||
4590 | !TemplateParams.empty() && TemplateParams.back()->size() == 0; | ||||||
4591 | if (Tag && SS.isNotEmpty() && !Tag->isCompleteDefinition() && | ||||||
4592 | !IsExplicitInstantiation && !IsExplicitSpecialization && | ||||||
4593 | !isa<ClassTemplatePartialSpecializationDecl>(Tag)) { | ||||||
4594 | // Per C++ [dcl.type.elab]p1, a class declaration cannot have a | ||||||
4595 | // nested-name-specifier unless it is an explicit instantiation | ||||||
4596 | // or an explicit specialization. | ||||||
4597 | // | ||||||
4598 | // FIXME: We allow class template partial specializations here too, per the | ||||||
4599 | // obvious intent of DR1819. | ||||||
4600 | // | ||||||
4601 | // Per C++ [dcl.enum]p1, an opaque-enum-declaration can't either. | ||||||
4602 | Diag(SS.getBeginLoc(), diag::err_standalone_class_nested_name_specifier) | ||||||
4603 | << GetDiagnosticTypeSpecifierID(DS.getTypeSpecType()) << SS.getRange(); | ||||||
4604 | return nullptr; | ||||||
4605 | } | ||||||
4606 | |||||||
4607 | // Track whether this decl-specifier declares anything. | ||||||
4608 | bool DeclaresAnything = true; | ||||||
4609 | |||||||
4610 | // Handle anonymous struct definitions. | ||||||
4611 | if (RecordDecl *Record = dyn_cast_or_null<RecordDecl>(Tag)) { | ||||||
4612 | if (!Record->getDeclName() && Record->isCompleteDefinition() && | ||||||
4613 | DS.getStorageClassSpec() != DeclSpec::SCS_typedef) { | ||||||
4614 | if (getLangOpts().CPlusPlus || | ||||||
4615 | Record->getDeclContext()->isRecord()) { | ||||||
4616 | // If CurContext is a DeclContext that can contain statements, | ||||||
4617 | // RecursiveASTVisitor won't visit the decls that | ||||||
4618 | // BuildAnonymousStructOrUnion() will put into CurContext. | ||||||
4619 | // Also store them here so that they can be part of the | ||||||
4620 | // DeclStmt that gets created in this case. | ||||||
4621 | // FIXME: Also return the IndirectFieldDecls created by | ||||||
4622 | // BuildAnonymousStructOr union, for the same reason? | ||||||
4623 | if (CurContext->isFunctionOrMethod()) | ||||||
4624 | AnonRecord = Record; | ||||||
4625 | return BuildAnonymousStructOrUnion(S, DS, AS, Record, | ||||||
4626 | Context.getPrintingPolicy()); | ||||||
4627 | } | ||||||
4628 | |||||||
4629 | DeclaresAnything = false; | ||||||
4630 | } | ||||||
4631 | } | ||||||
4632 | |||||||
4633 | // C11 6.7.2.1p2: | ||||||
4634 | // A struct-declaration that does not declare an anonymous structure or | ||||||
4635 | // anonymous union shall contain a struct-declarator-list. | ||||||
4636 | // | ||||||
4637 | // This rule also existed in C89 and C99; the grammar for struct-declaration | ||||||
4638 | // did not permit a struct-declaration without a struct-declarator-list. | ||||||
4639 | if (!getLangOpts().CPlusPlus && CurContext->isRecord() && | ||||||
4640 | DS.getStorageClassSpec() == DeclSpec::SCS_unspecified) { | ||||||
4641 | // Check for Microsoft C extension: anonymous struct/union member. | ||||||
4642 | // Handle 2 kinds of anonymous struct/union: | ||||||
4643 | // struct STRUCT; | ||||||
4644 | // union UNION; | ||||||
4645 | // and | ||||||
4646 | // STRUCT_TYPE; <- where STRUCT_TYPE is a typedef struct. | ||||||
4647 | // UNION_TYPE; <- where UNION_TYPE is a typedef union. | ||||||
4648 | if ((Tag && Tag->getDeclName()) || | ||||||
4649 | DS.getTypeSpecType() == DeclSpec::TST_typename) { | ||||||
4650 | RecordDecl *Record = nullptr; | ||||||
4651 | if (Tag) | ||||||
4652 | Record = dyn_cast<RecordDecl>(Tag); | ||||||
4653 | else if (const RecordType *RT = | ||||||
4654 | DS.getRepAsType().get()->getAsStructureType()) | ||||||
4655 | Record = RT->getDecl(); | ||||||
4656 | else if (const RecordType *UT = DS.getRepAsType().get()->getAsUnionType()) | ||||||
4657 | Record = UT->getDecl(); | ||||||
4658 | |||||||
4659 | if (Record && getLangOpts().MicrosoftExt) { | ||||||
4660 | Diag(DS.getBeginLoc(), diag::ext_ms_anonymous_record) | ||||||
4661 | << Record->isUnion() << DS.getSourceRange(); | ||||||
4662 | return BuildMicrosoftCAnonymousStruct(S, DS, Record); | ||||||
4663 | } | ||||||
4664 | |||||||
4665 | DeclaresAnything = false; | ||||||
4666 | } | ||||||
4667 | } | ||||||
4668 | |||||||
4669 | // Skip all the checks below if we have a type error. | ||||||
4670 | if (DS.getTypeSpecType() == DeclSpec::TST_error || | ||||||
4671 | (TagD && TagD->isInvalidDecl())) | ||||||
4672 | return TagD; | ||||||
4673 | |||||||
4674 | if (getLangOpts().CPlusPlus && | ||||||
4675 | DS.getStorageClassSpec() != DeclSpec::SCS_typedef) | ||||||
4676 | if (EnumDecl *Enum = dyn_cast_or_null<EnumDecl>(Tag)) | ||||||
4677 | if (Enum->enumerator_begin() == Enum->enumerator_end() && | ||||||
4678 | !Enum->getIdentifier() && !Enum->isInvalidDecl()) | ||||||
4679 | DeclaresAnything = false; | ||||||
4680 | |||||||
4681 | if (!DS.isMissingDeclaratorOk()) { | ||||||
4682 | // Customize diagnostic for a typedef missing a name. | ||||||
4683 | if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) | ||||||
4684 | Diag(DS.getBeginLoc(), diag::ext_typedef_without_a_name) | ||||||
4685 | << DS.getSourceRange(); | ||||||
4686 | else | ||||||
4687 | DeclaresAnything = false; | ||||||
4688 | } | ||||||
4689 | |||||||
4690 | if (DS.isModulePrivateSpecified() && | ||||||
4691 | Tag && Tag->getDeclContext()->isFunctionOrMethod()) | ||||||
4692 | Diag(DS.getModulePrivateSpecLoc(), diag::err_module_private_local_class) | ||||||
4693 | << Tag->getTagKind() | ||||||
4694 | << FixItHint::CreateRemoval(DS.getModulePrivateSpecLoc()); | ||||||
4695 | |||||||
4696 | ActOnDocumentableDecl(TagD); | ||||||
4697 | |||||||
4698 | // C 6.7/2: | ||||||
4699 | // A declaration [...] shall declare at least a declarator [...], a tag, | ||||||
4700 | // or the members of an enumeration. | ||||||
4701 | // C++ [dcl.dcl]p3: | ||||||
4702 | // [If there are no declarators], and except for the declaration of an | ||||||
4703 | // unnamed bit-field, the decl-specifier-seq shall introduce one or more | ||||||
4704 | // names into the program, or shall redeclare a name introduced by a | ||||||
4705 | // previous declaration. | ||||||
4706 | if (!DeclaresAnything) { | ||||||
4707 | // In C, we allow this as a (popular) extension / bug. Don't bother | ||||||
4708 | // producing further diagnostics for redundant qualifiers after this. | ||||||
4709 | Diag(DS.getBeginLoc(), diag::ext_no_declarators) << DS.getSourceRange(); | ||||||
4710 | return TagD; | ||||||
4711 | } | ||||||
4712 | |||||||
4713 | // C++ [dcl.stc]p1: | ||||||
4714 | // If a storage-class-specifier appears in a decl-specifier-seq, [...] the | ||||||
4715 | // init-declarator-list of the declaration shall not be empty. | ||||||
4716 | // C++ [dcl.fct.spec]p1: | ||||||
4717 | // If a cv-qualifier appears in a decl-specifier-seq, the | ||||||
4718 | // init-declarator-list of the declaration shall not be empty. | ||||||
4719 | // | ||||||
4720 | // Spurious qualifiers here appear to be valid in C. | ||||||
4721 | unsigned DiagID = diag::warn_standalone_specifier; | ||||||
4722 | if (getLangOpts().CPlusPlus) | ||||||
4723 | DiagID = diag::ext_standalone_specifier; | ||||||
4724 | |||||||
4725 | // Note that a linkage-specification sets a storage class, but | ||||||
4726 | // 'extern "C" struct foo;' is actually valid and not theoretically | ||||||
4727 | // useless. | ||||||
4728 | if (DeclSpec::SCS SCS = DS.getStorageClassSpec()) { | ||||||
4729 | if (SCS == DeclSpec::SCS_mutable) | ||||||
4730 | // Since mutable is not a viable storage class specifier in C, there is | ||||||
4731 | // no reason to treat it as an extension. Instead, diagnose as an error. | ||||||
4732 | Diag(DS.getStorageClassSpecLoc(), diag::err_mutable_nonmember); | ||||||
4733 | else if (!DS.isExternInLinkageSpec() && SCS != DeclSpec::SCS_typedef) | ||||||
4734 | Diag(DS.getStorageClassSpecLoc(), DiagID) | ||||||
4735 | << DeclSpec::getSpecifierName(SCS); | ||||||
4736 | } | ||||||
4737 | |||||||
4738 | if (DeclSpec::TSCS TSCS = DS.getThreadStorageClassSpec()) | ||||||
4739 | Diag(DS.getThreadStorageClassSpecLoc(), DiagID) | ||||||
4740 | << DeclSpec::getSpecifierName(TSCS); | ||||||
4741 | if (DS.getTypeQualifiers()) { | ||||||
4742 | if (DS.getTypeQualifiers() & DeclSpec::TQ_const) | ||||||
4743 | Diag(DS.getConstSpecLoc(), DiagID) << "const"; | ||||||
4744 | if (DS.getTypeQualifiers() & DeclSpec::TQ_volatile) | ||||||
4745 | Diag(DS.getConstSpecLoc(), DiagID) << "volatile"; | ||||||
4746 | // Restrict is covered above. | ||||||
4747 | if (DS.getTypeQualifiers() & DeclSpec::TQ_atomic) | ||||||
4748 | Diag(DS.getAtomicSpecLoc(), DiagID) << "_Atomic"; | ||||||
4749 | if (DS.getTypeQualifiers() & DeclSpec::TQ_unaligned) | ||||||
4750 | Diag(DS.getUnalignedSpecLoc(), DiagID) << "__unaligned"; | ||||||
4751 | } | ||||||
4752 | |||||||
4753 | // Warn about ignored type attributes, for example: | ||||||
4754 | // __attribute__((aligned)) struct A; | ||||||
4755 | // Attributes should be placed after tag to apply to type declaration. | ||||||
4756 | if (!DS.getAttributes().empty()) { | ||||||
4757 | DeclSpec::TST TypeSpecType = DS.getTypeSpecType(); | ||||||
4758 | if (TypeSpecType == DeclSpec::TST_class || | ||||||
4759 | TypeSpecType == DeclSpec::TST_struct || | ||||||
4760 | TypeSpecType == DeclSpec::TST_interface || | ||||||
4761 | TypeSpecType == DeclSpec::TST_union || | ||||||
4762 | TypeSpecType == DeclSpec::TST_enum) { | ||||||
4763 | for (const ParsedAttr &AL : DS.getAttributes()) | ||||||
4764 | Diag(AL.getLoc(), diag::warn_declspec_attribute_ignored) | ||||||
4765 | << AL << GetDiagnosticTypeSpecifierID(TypeSpecType); | ||||||
4766 | } | ||||||
4767 | } | ||||||
4768 | |||||||
4769 | return TagD; | ||||||
4770 | } | ||||||
4771 | |||||||
4772 | /// We are trying to inject an anonymous member into the given scope; | ||||||
4773 | /// check if there's an existing declaration that can't be overloaded. | ||||||
4774 | /// | ||||||
4775 | /// \return true if this is a forbidden redeclaration | ||||||
4776 | static bool CheckAnonMemberRedeclaration(Sema &SemaRef, | ||||||
4777 | Scope *S, | ||||||
4778 | DeclContext *Owner, | ||||||
4779 | DeclarationName Name, | ||||||
4780 | SourceLocation NameLoc, | ||||||
4781 | bool IsUnion) { | ||||||
4782 | LookupResult R(SemaRef, Name, NameLoc, Sema::LookupMemberName, | ||||||
4783 | Sema::ForVisibleRedeclaration); | ||||||
4784 | if (!SemaRef.LookupName(R, S)) return false; | ||||||
4785 | |||||||
4786 | // Pick a representative declaration. | ||||||
4787 | NamedDecl *PrevDecl = R.getRepresentativeDecl()->getUnderlyingDecl(); | ||||||
4788 | assert(PrevDecl && "Expected a non-null Decl")((PrevDecl && "Expected a non-null Decl") ? static_cast <void> (0) : __assert_fail ("PrevDecl && \"Expected a non-null Decl\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 4788, __PRETTY_FUNCTION__)); | ||||||
4789 | |||||||
4790 | if (!SemaRef.isDeclInScope(PrevDecl, Owner, S)) | ||||||
4791 | return false; | ||||||
4792 | |||||||
4793 | SemaRef.Diag(NameLoc, diag::err_anonymous_record_member_redecl) | ||||||
4794 | << IsUnion << Name; | ||||||
4795 | SemaRef.Diag(PrevDecl->getLocation(), diag::note_previous_declaration); | ||||||
4796 | |||||||
4797 | return true; | ||||||
4798 | } | ||||||
4799 | |||||||
4800 | /// InjectAnonymousStructOrUnionMembers - Inject the members of the | ||||||
4801 | /// anonymous struct or union AnonRecord into the owning context Owner | ||||||
4802 | /// and scope S. This routine will be invoked just after we realize | ||||||
4803 | /// that an unnamed union or struct is actually an anonymous union or | ||||||
4804 | /// struct, e.g., | ||||||
4805 | /// | ||||||
4806 | /// @code | ||||||
4807 | /// union { | ||||||
4808 | /// int i; | ||||||
4809 | /// float f; | ||||||
4810 | /// }; // InjectAnonymousStructOrUnionMembers called here to inject i and | ||||||
4811 | /// // f into the surrounding scope.x | ||||||
4812 | /// @endcode | ||||||
4813 | /// | ||||||
4814 | /// This routine is recursive, injecting the names of nested anonymous | ||||||
4815 | /// structs/unions into the owning context and scope as well. | ||||||
4816 | static bool | ||||||
4817 | InjectAnonymousStructOrUnionMembers(Sema &SemaRef, Scope *S, DeclContext *Owner, | ||||||
4818 | RecordDecl *AnonRecord, AccessSpecifier AS, | ||||||
4819 | SmallVectorImpl<NamedDecl *> &Chaining) { | ||||||
4820 | bool Invalid = false; | ||||||
4821 | |||||||
4822 | // Look every FieldDecl and IndirectFieldDecl with a name. | ||||||
4823 | for (auto *D : AnonRecord->decls()) { | ||||||
4824 | if ((isa<FieldDecl>(D) || isa<IndirectFieldDecl>(D)) && | ||||||
4825 | cast<NamedDecl>(D)->getDeclName()) { | ||||||
4826 | ValueDecl *VD = cast<ValueDecl>(D); | ||||||
4827 | if (CheckAnonMemberRedeclaration(SemaRef, S, Owner, VD->getDeclName(), | ||||||
4828 | VD->getLocation(), | ||||||
4829 | AnonRecord->isUnion())) { | ||||||
4830 | // C++ [class.union]p2: | ||||||
4831 | // The names of the members of an anonymous union shall be | ||||||
4832 | // distinct from the names of any other entity in the | ||||||
4833 | // scope in which the anonymous union is declared. | ||||||
4834 | Invalid = true; | ||||||
4835 | } else { | ||||||
4836 | // C++ [class.union]p2: | ||||||
4837 | // For the purpose of name lookup, after the anonymous union | ||||||
4838 | // definition, the members of the anonymous union are | ||||||
4839 | // considered to have been defined in the scope in which the | ||||||
4840 | // anonymous union is declared. | ||||||
4841 | unsigned OldChainingSize = Chaining.size(); | ||||||
4842 | if (IndirectFieldDecl *IF = dyn_cast<IndirectFieldDecl>(VD)) | ||||||
4843 | Chaining.append(IF->chain_begin(), IF->chain_end()); | ||||||
4844 | else | ||||||
4845 | Chaining.push_back(VD); | ||||||
4846 | |||||||
4847 | assert(Chaining.size() >= 2)((Chaining.size() >= 2) ? static_cast<void> (0) : __assert_fail ("Chaining.size() >= 2", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 4847, __PRETTY_FUNCTION__)); | ||||||
4848 | NamedDecl **NamedChain = | ||||||
4849 | new (SemaRef.Context)NamedDecl*[Chaining.size()]; | ||||||
4850 | for (unsigned i = 0; i < Chaining.size(); i++) | ||||||
4851 | NamedChain[i] = Chaining[i]; | ||||||
4852 | |||||||
4853 | IndirectFieldDecl *IndirectField = IndirectFieldDecl::Create( | ||||||
4854 | SemaRef.Context, Owner, VD->getLocation(), VD->getIdentifier(), | ||||||
4855 | VD->getType(), {NamedChain, Chaining.size()}); | ||||||
4856 | |||||||
4857 | for (const auto *Attr : VD->attrs()) | ||||||
4858 | IndirectField->addAttr(Attr->clone(SemaRef.Context)); | ||||||
4859 | |||||||
4860 | IndirectField->setAccess(AS); | ||||||
4861 | IndirectField->setImplicit(); | ||||||
4862 | SemaRef.PushOnScopeChains(IndirectField, S); | ||||||
4863 | |||||||
4864 | // That includes picking up the appropriate access specifier. | ||||||
4865 | if (AS != AS_none) IndirectField->setAccess(AS); | ||||||
4866 | |||||||
4867 | Chaining.resize(OldChainingSize); | ||||||
4868 | } | ||||||
4869 | } | ||||||
4870 | } | ||||||
4871 | |||||||
4872 | return Invalid; | ||||||
4873 | } | ||||||
4874 | |||||||
4875 | /// StorageClassSpecToVarDeclStorageClass - Maps a DeclSpec::SCS to | ||||||
4876 | /// a VarDecl::StorageClass. Any error reporting is up to the caller: | ||||||
4877 | /// illegal input values are mapped to SC_None. | ||||||
4878 | static StorageClass | ||||||
4879 | StorageClassSpecToVarDeclStorageClass(const DeclSpec &DS) { | ||||||
4880 | DeclSpec::SCS StorageClassSpec = DS.getStorageClassSpec(); | ||||||
4881 | assert(StorageClassSpec != DeclSpec::SCS_typedef &&((StorageClassSpec != DeclSpec::SCS_typedef && "Parser allowed 'typedef' as storage class VarDecl." ) ? static_cast<void> (0) : __assert_fail ("StorageClassSpec != DeclSpec::SCS_typedef && \"Parser allowed 'typedef' as storage class VarDecl.\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 4882, __PRETTY_FUNCTION__)) | ||||||
4882 | "Parser allowed 'typedef' as storage class VarDecl.")((StorageClassSpec != DeclSpec::SCS_typedef && "Parser allowed 'typedef' as storage class VarDecl." ) ? static_cast<void> (0) : __assert_fail ("StorageClassSpec != DeclSpec::SCS_typedef && \"Parser allowed 'typedef' as storage class VarDecl.\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 4882, __PRETTY_FUNCTION__)); | ||||||
4883 | switch (StorageClassSpec) { | ||||||
4884 | case DeclSpec::SCS_unspecified: return SC_None; | ||||||
4885 | case DeclSpec::SCS_extern: | ||||||
4886 | if (DS.isExternInLinkageSpec()) | ||||||
4887 | return SC_None; | ||||||
4888 | return SC_Extern; | ||||||
4889 | case DeclSpec::SCS_static: return SC_Static; | ||||||
4890 | case DeclSpec::SCS_auto: return SC_Auto; | ||||||
4891 | case DeclSpec::SCS_register: return SC_Register; | ||||||
4892 | case DeclSpec::SCS_private_extern: return SC_PrivateExtern; | ||||||
4893 | // Illegal SCSs map to None: error reporting is up to the caller. | ||||||
4894 | case DeclSpec::SCS_mutable: // Fall through. | ||||||
4895 | case DeclSpec::SCS_typedef: return SC_None; | ||||||
4896 | } | ||||||
4897 | llvm_unreachable("unknown storage class specifier")::llvm::llvm_unreachable_internal("unknown storage class specifier" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 4897); | ||||||
4898 | } | ||||||
4899 | |||||||
4900 | static SourceLocation findDefaultInitializer(const CXXRecordDecl *Record) { | ||||||
4901 | assert(Record->hasInClassInitializer())((Record->hasInClassInitializer()) ? static_cast<void> (0) : __assert_fail ("Record->hasInClassInitializer()", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 4901, __PRETTY_FUNCTION__)); | ||||||
4902 | |||||||
4903 | for (const auto *I : Record->decls()) { | ||||||
4904 | const auto *FD = dyn_cast<FieldDecl>(I); | ||||||
4905 | if (const auto *IFD = dyn_cast<IndirectFieldDecl>(I)) | ||||||
4906 | FD = IFD->getAnonField(); | ||||||
4907 | if (FD && FD->hasInClassInitializer()) | ||||||
4908 | return FD->getLocation(); | ||||||
4909 | } | ||||||
4910 | |||||||
4911 | llvm_unreachable("couldn't find in-class initializer")::llvm::llvm_unreachable_internal("couldn't find in-class initializer" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 4911); | ||||||
4912 | } | ||||||
4913 | |||||||
4914 | static void checkDuplicateDefaultInit(Sema &S, CXXRecordDecl *Parent, | ||||||
4915 | SourceLocation DefaultInitLoc) { | ||||||
4916 | if (!Parent->isUnion() || !Parent->hasInClassInitializer()) | ||||||
4917 | return; | ||||||
4918 | |||||||
4919 | S.Diag(DefaultInitLoc, diag::err_multiple_mem_union_initialization); | ||||||
4920 | S.Diag(findDefaultInitializer(Parent), diag::note_previous_initializer) << 0; | ||||||
4921 | } | ||||||
4922 | |||||||
4923 | static void checkDuplicateDefaultInit(Sema &S, CXXRecordDecl *Parent, | ||||||
4924 | CXXRecordDecl *AnonUnion) { | ||||||
4925 | if (!Parent->isUnion() || !Parent->hasInClassInitializer()) | ||||||
4926 | return; | ||||||
4927 | |||||||
4928 | checkDuplicateDefaultInit(S, Parent, findDefaultInitializer(AnonUnion)); | ||||||
4929 | } | ||||||
4930 | |||||||
4931 | /// BuildAnonymousStructOrUnion - Handle the declaration of an | ||||||
4932 | /// anonymous structure or union. Anonymous unions are a C++ feature | ||||||
4933 | /// (C++ [class.union]) and a C11 feature; anonymous structures | ||||||
4934 | /// are a C11 feature and GNU C++ extension. | ||||||
4935 | Decl *Sema::BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, | ||||||
4936 | AccessSpecifier AS, | ||||||
4937 | RecordDecl *Record, | ||||||
4938 | const PrintingPolicy &Policy) { | ||||||
4939 | DeclContext *Owner = Record->getDeclContext(); | ||||||
4940 | |||||||
4941 | // Diagnose whether this anonymous struct/union is an extension. | ||||||
4942 | if (Record->isUnion() && !getLangOpts().CPlusPlus && !getLangOpts().C11) | ||||||
4943 | Diag(Record->getLocation(), diag::ext_anonymous_union); | ||||||
4944 | else if (!Record->isUnion() && getLangOpts().CPlusPlus) | ||||||
4945 | Diag(Record->getLocation(), diag::ext_gnu_anonymous_struct); | ||||||
4946 | else if (!Record->isUnion() && !getLangOpts().C11) | ||||||
4947 | Diag(Record->getLocation(), diag::ext_c11_anonymous_struct); | ||||||
4948 | |||||||
4949 | // C and C++ require different kinds of checks for anonymous | ||||||
4950 | // structs/unions. | ||||||
4951 | bool Invalid = false; | ||||||
4952 | if (getLangOpts().CPlusPlus) { | ||||||
4953 | const char *PrevSpec = nullptr; | ||||||
4954 | if (Record->isUnion()) { | ||||||
4955 | // C++ [class.union]p6: | ||||||
4956 | // C++17 [class.union.anon]p2: | ||||||
4957 | // Anonymous unions declared in a named namespace or in the | ||||||
4958 | // global namespace shall be declared static. | ||||||
4959 | unsigned DiagID; | ||||||
4960 | DeclContext *OwnerScope = Owner->getRedeclContext(); | ||||||
4961 | if (DS.getStorageClassSpec() != DeclSpec::SCS_static && | ||||||
4962 | (OwnerScope->isTranslationUnit() || | ||||||
4963 | (OwnerScope->isNamespace() && | ||||||
4964 | !cast<NamespaceDecl>(OwnerScope)->isAnonymousNamespace()))) { | ||||||
4965 | Diag(Record->getLocation(), diag::err_anonymous_union_not_static) | ||||||
4966 | << FixItHint::CreateInsertion(Record->getLocation(), "static "); | ||||||
4967 | |||||||
4968 | // Recover by adding 'static'. | ||||||
4969 | DS.SetStorageClassSpec(*this, DeclSpec::SCS_static, SourceLocation(), | ||||||
4970 | PrevSpec, DiagID, Policy); | ||||||
4971 | } | ||||||
4972 | // C++ [class.union]p6: | ||||||
4973 | // A storage class is not allowed in a declaration of an | ||||||
4974 | // anonymous union in a class scope. | ||||||
4975 | else if (DS.getStorageClassSpec() != DeclSpec::SCS_unspecified && | ||||||
4976 | isa<RecordDecl>(Owner)) { | ||||||
4977 | Diag(DS.getStorageClassSpecLoc(), | ||||||
4978 | diag::err_anonymous_union_with_storage_spec) | ||||||
4979 | << FixItHint::CreateRemoval(DS.getStorageClassSpecLoc()); | ||||||
4980 | |||||||
4981 | // Recover by removing the storage specifier. | ||||||
4982 | DS.SetStorageClassSpec(*this, DeclSpec::SCS_unspecified, | ||||||
4983 | SourceLocation(), | ||||||
4984 | PrevSpec, DiagID, Context.getPrintingPolicy()); | ||||||
4985 | } | ||||||
4986 | } | ||||||
4987 | |||||||
4988 | // Ignore const/volatile/restrict qualifiers. | ||||||
4989 | if (DS.getTypeQualifiers()) { | ||||||
4990 | if (DS.getTypeQualifiers() & DeclSpec::TQ_const) | ||||||
4991 | Diag(DS.getConstSpecLoc(), diag::ext_anonymous_struct_union_qualified) | ||||||
4992 | << Record->isUnion() << "const" | ||||||
4993 | << FixItHint::CreateRemoval(DS.getConstSpecLoc()); | ||||||
4994 | if (DS.getTypeQualifiers() & DeclSpec::TQ_volatile) | ||||||
4995 | Diag(DS.getVolatileSpecLoc(), | ||||||
4996 | diag::ext_anonymous_struct_union_qualified) | ||||||
4997 | << Record->isUnion() << "volatile" | ||||||
4998 | << FixItHint::CreateRemoval(DS.getVolatileSpecLoc()); | ||||||
4999 | if (DS.getTypeQualifiers() & DeclSpec::TQ_restrict) | ||||||
5000 | Diag(DS.getRestrictSpecLoc(), | ||||||
5001 | diag::ext_anonymous_struct_union_qualified) | ||||||
5002 | << Record->isUnion() << "restrict" | ||||||
5003 | << FixItHint::CreateRemoval(DS.getRestrictSpecLoc()); | ||||||
5004 | if (DS.getTypeQualifiers() & DeclSpec::TQ_atomic) | ||||||
5005 | Diag(DS.getAtomicSpecLoc(), | ||||||
5006 | diag::ext_anonymous_struct_union_qualified) | ||||||
5007 | << Record->isUnion() << "_Atomic" | ||||||
5008 | << FixItHint::CreateRemoval(DS.getAtomicSpecLoc()); | ||||||
5009 | if (DS.getTypeQualifiers() & DeclSpec::TQ_unaligned) | ||||||
5010 | Diag(DS.getUnalignedSpecLoc(), | ||||||
5011 | diag::ext_anonymous_struct_union_qualified) | ||||||
5012 | << Record->isUnion() << "__unaligned" | ||||||
5013 | << FixItHint::CreateRemoval(DS.getUnalignedSpecLoc()); | ||||||
5014 | |||||||
5015 | DS.ClearTypeQualifiers(); | ||||||
5016 | } | ||||||
5017 | |||||||
5018 | // C++ [class.union]p2: | ||||||
5019 | // The member-specification of an anonymous union shall only | ||||||
5020 | // define non-static data members. [Note: nested types and | ||||||
5021 | // functions cannot be declared within an anonymous union. ] | ||||||
5022 | for (auto *Mem : Record->decls()) { | ||||||
5023 | // Ignore invalid declarations; we already diagnosed them. | ||||||
5024 | if (Mem->isInvalidDecl()) | ||||||
5025 | continue; | ||||||
5026 | |||||||
5027 | if (auto *FD = dyn_cast<FieldDecl>(Mem)) { | ||||||
5028 | // C++ [class.union]p3: | ||||||
5029 | // An anonymous union shall not have private or protected | ||||||
5030 | // members (clause 11). | ||||||
5031 | assert(FD->getAccess() != AS_none)((FD->getAccess() != AS_none) ? static_cast<void> (0 ) : __assert_fail ("FD->getAccess() != AS_none", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 5031, __PRETTY_FUNCTION__)); | ||||||
5032 | if (FD->getAccess() != AS_public) { | ||||||
5033 | Diag(FD->getLocation(), diag::err_anonymous_record_nonpublic_member) | ||||||
5034 | << Record->isUnion() << (FD->getAccess() == AS_protected); | ||||||
5035 | Invalid = true; | ||||||
5036 | } | ||||||
5037 | |||||||
5038 | // C++ [class.union]p1 | ||||||
5039 | // An object of a class with a non-trivial constructor, a non-trivial | ||||||
5040 | // copy constructor, a non-trivial destructor, or a non-trivial copy | ||||||
5041 | // assignment operator cannot be a member of a union, nor can an | ||||||
5042 | // array of such objects. | ||||||
5043 | if (CheckNontrivialField(FD)) | ||||||
5044 | Invalid = true; | ||||||
5045 | } else if (Mem->isImplicit()) { | ||||||
5046 | // Any implicit members are fine. | ||||||
5047 | } else if (isa<TagDecl>(Mem) && Mem->getDeclContext() != Record) { | ||||||
5048 | // This is a type that showed up in an | ||||||
5049 | // elaborated-type-specifier inside the anonymous struct or | ||||||
5050 | // union, but which actually declares a type outside of the | ||||||
5051 | // anonymous struct or union. It's okay. | ||||||
5052 | } else if (auto *MemRecord = dyn_cast<RecordDecl>(Mem)) { | ||||||
5053 | if (!MemRecord->isAnonymousStructOrUnion() && | ||||||
5054 | MemRecord->getDeclName()) { | ||||||
5055 | // Visual C++ allows type definition in anonymous struct or union. | ||||||
5056 | if (getLangOpts().MicrosoftExt) | ||||||
5057 | Diag(MemRecord->getLocation(), diag::ext_anonymous_record_with_type) | ||||||
5058 | << Record->isUnion(); | ||||||
5059 | else { | ||||||
5060 | // This is a nested type declaration. | ||||||
5061 | Diag(MemRecord->getLocation(), diag::err_anonymous_record_with_type) | ||||||
5062 | << Record->isUnion(); | ||||||
5063 | Invalid = true; | ||||||
5064 | } | ||||||
5065 | } else { | ||||||
5066 | // This is an anonymous type definition within another anonymous type. | ||||||
5067 | // This is a popular extension, provided by Plan9, MSVC and GCC, but | ||||||
5068 | // not part of standard C++. | ||||||
5069 | Diag(MemRecord->getLocation(), | ||||||
5070 | diag::ext_anonymous_record_with_anonymous_type) | ||||||
5071 | << Record->isUnion(); | ||||||
5072 | } | ||||||
5073 | } else if (isa<AccessSpecDecl>(Mem)) { | ||||||
5074 | // Any access specifier is fine. | ||||||
5075 | } else if (isa<StaticAssertDecl>(Mem)) { | ||||||
5076 | // In C++1z, static_assert declarations are also fine. | ||||||
5077 | } else { | ||||||
5078 | // We have something that isn't a non-static data | ||||||
5079 | // member. Complain about it. | ||||||
5080 | unsigned DK = diag::err_anonymous_record_bad_member; | ||||||
5081 | if (isa<TypeDecl>(Mem)) | ||||||
5082 | DK = diag::err_anonymous_record_with_type; | ||||||
5083 | else if (isa<FunctionDecl>(Mem)) | ||||||
5084 | DK = diag::err_anonymous_record_with_function; | ||||||
5085 | else if (isa<VarDecl>(Mem)) | ||||||
5086 | DK = diag::err_anonymous_record_with_static; | ||||||
5087 | |||||||
5088 | // Visual C++ allows type definition in anonymous struct or union. | ||||||
5089 | if (getLangOpts().MicrosoftExt && | ||||||
5090 | DK == diag::err_anonymous_record_with_type) | ||||||
5091 | Diag(Mem->getLocation(), diag::ext_anonymous_record_with_type) | ||||||
5092 | << Record->isUnion(); | ||||||
5093 | else { | ||||||
5094 | Diag(Mem->getLocation(), DK) << Record->isUnion(); | ||||||
5095 | Invalid = true; | ||||||
5096 | } | ||||||
5097 | } | ||||||
5098 | } | ||||||
5099 | |||||||
5100 | // C++11 [class.union]p8 (DR1460): | ||||||
5101 | // At most one variant member of a union may have a | ||||||
5102 | // brace-or-equal-initializer. | ||||||
5103 | if (cast<CXXRecordDecl>(Record)->hasInClassInitializer() && | ||||||
5104 | Owner->isRecord()) | ||||||
5105 | checkDuplicateDefaultInit(*this, cast<CXXRecordDecl>(Owner), | ||||||
5106 | cast<CXXRecordDecl>(Record)); | ||||||
5107 | } | ||||||
5108 | |||||||
5109 | if (!Record->isUnion() && !Owner->isRecord()) { | ||||||
5110 | Diag(Record->getLocation(), diag::err_anonymous_struct_not_member) | ||||||
5111 | << getLangOpts().CPlusPlus; | ||||||
5112 | Invalid = true; | ||||||
5113 | } | ||||||
5114 | |||||||
5115 | // C++ [dcl.dcl]p3: | ||||||
5116 | // [If there are no declarators], and except for the declaration of an | ||||||
5117 | // unnamed bit-field, the decl-specifier-seq shall introduce one or more | ||||||
5118 | // names into the program | ||||||
5119 | // C++ [class.mem]p2: | ||||||
5120 | // each such member-declaration shall either declare at least one member | ||||||
5121 | // name of the class or declare at least one unnamed bit-field | ||||||
5122 | // | ||||||
5123 | // For C this is an error even for a named struct, and is diagnosed elsewhere. | ||||||
5124 | if (getLangOpts().CPlusPlus && Record->field_empty()) | ||||||
5125 | Diag(DS.getBeginLoc(), diag::ext_no_declarators) << DS.getSourceRange(); | ||||||
5126 | |||||||
5127 | // Mock up a declarator. | ||||||
5128 | Declarator Dc(DS, DeclaratorContext::MemberContext); | ||||||
5129 | TypeSourceInfo *TInfo = GetTypeForDeclarator(Dc, S); | ||||||
5130 | assert(TInfo && "couldn't build declarator info for anonymous struct/union")((TInfo && "couldn't build declarator info for anonymous struct/union" ) ? static_cast<void> (0) : __assert_fail ("TInfo && \"couldn't build declarator info for anonymous struct/union\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 5130, __PRETTY_FUNCTION__)); | ||||||
5131 | |||||||
5132 | // Create a declaration for this anonymous struct/union. | ||||||
5133 | NamedDecl *Anon = nullptr; | ||||||
5134 | if (RecordDecl *OwningClass = dyn_cast<RecordDecl>(Owner)) { | ||||||
5135 | Anon = FieldDecl::Create( | ||||||
5136 | Context, OwningClass, DS.getBeginLoc(), Record->getLocation(), | ||||||
5137 | /*IdentifierInfo=*/nullptr, Context.getTypeDeclType(Record), TInfo, | ||||||
5138 | /*BitWidth=*/nullptr, /*Mutable=*/false, | ||||||
5139 | /*InitStyle=*/ICIS_NoInit); | ||||||
5140 | Anon->setAccess(AS); | ||||||
5141 | ProcessDeclAttributes(S, Anon, Dc); | ||||||
5142 | |||||||
5143 | if (getLangOpts().CPlusPlus) | ||||||
5144 | FieldCollector->Add(cast<FieldDecl>(Anon)); | ||||||
5145 | } else { | ||||||
5146 | DeclSpec::SCS SCSpec = DS.getStorageClassSpec(); | ||||||
5147 | StorageClass SC = StorageClassSpecToVarDeclStorageClass(DS); | ||||||
5148 | if (SCSpec == DeclSpec::SCS_mutable) { | ||||||
5149 | // mutable can only appear on non-static class members, so it's always | ||||||
5150 | // an error here | ||||||
5151 | Diag(Record->getLocation(), diag::err_mutable_nonmember); | ||||||
5152 | Invalid = true; | ||||||
5153 | SC = SC_None; | ||||||
5154 | } | ||||||
5155 | |||||||
5156 | assert(DS.getAttributes().empty() && "No attribute expected")((DS.getAttributes().empty() && "No attribute expected" ) ? static_cast<void> (0) : __assert_fail ("DS.getAttributes().empty() && \"No attribute expected\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 5156, __PRETTY_FUNCTION__)); | ||||||
5157 | Anon = VarDecl::Create(Context, Owner, DS.getBeginLoc(), | ||||||
5158 | Record->getLocation(), /*IdentifierInfo=*/nullptr, | ||||||
5159 | Context.getTypeDeclType(Record), TInfo, SC); | ||||||
5160 | |||||||
5161 | // Default-initialize the implicit variable. This initialization will be | ||||||
5162 | // trivial in almost all cases, except if a union member has an in-class | ||||||
5163 | // initializer: | ||||||
5164 | // union { int n = 0; }; | ||||||
5165 | ActOnUninitializedDecl(Anon); | ||||||
5166 | } | ||||||
5167 | Anon->setImplicit(); | ||||||
5168 | |||||||
5169 | // Mark this as an anonymous struct/union type. | ||||||
5170 | Record->setAnonymousStructOrUnion(true); | ||||||
5171 | |||||||
5172 | // Add the anonymous struct/union object to the current | ||||||
5173 | // context. We'll be referencing this object when we refer to one of | ||||||
5174 | // its members. | ||||||
5175 | Owner->addDecl(Anon); | ||||||
5176 | |||||||
5177 | // Inject the members of the anonymous struct/union into the owning | ||||||
5178 | // context and into the identifier resolver chain for name lookup | ||||||
5179 | // purposes. | ||||||
5180 | SmallVector<NamedDecl*, 2> Chain; | ||||||
5181 | Chain.push_back(Anon); | ||||||
5182 | |||||||
5183 | if (InjectAnonymousStructOrUnionMembers(*this, S, Owner, Record, AS, Chain)) | ||||||
5184 | Invalid = true; | ||||||
5185 | |||||||
5186 | if (VarDecl *NewVD = dyn_cast<VarDecl>(Anon)) { | ||||||
5187 | if (getLangOpts().CPlusPlus && NewVD->isStaticLocal()) { | ||||||
5188 | MangleNumberingContext *MCtx; | ||||||
5189 | Decl *ManglingContextDecl; | ||||||
5190 | std::tie(MCtx, ManglingContextDecl) = | ||||||
5191 | getCurrentMangleNumberContext(NewVD->getDeclContext()); | ||||||
5192 | if (MCtx) { | ||||||
5193 | Context.setManglingNumber( | ||||||
5194 | NewVD, MCtx->getManglingNumber( | ||||||
5195 | NewVD, getMSManglingNumber(getLangOpts(), S))); | ||||||
5196 | Context.setStaticLocalNumber(NewVD, MCtx->getStaticLocalNumber(NewVD)); | ||||||
5197 | } | ||||||
5198 | } | ||||||
5199 | } | ||||||
5200 | |||||||
5201 | if (Invalid) | ||||||
5202 | Anon->setInvalidDecl(); | ||||||
5203 | |||||||
5204 | return Anon; | ||||||
5205 | } | ||||||
5206 | |||||||
5207 | /// BuildMicrosoftCAnonymousStruct - Handle the declaration of an | ||||||
5208 | /// Microsoft C anonymous structure. | ||||||
5209 | /// Ref: http://msdn.microsoft.com/en-us/library/z2cx9y4f.aspx | ||||||
5210 | /// Example: | ||||||
5211 | /// | ||||||
5212 | /// struct A { int a; }; | ||||||
5213 | /// struct B { struct A; int b; }; | ||||||
5214 | /// | ||||||
5215 | /// void foo() { | ||||||
5216 | /// B var; | ||||||
5217 | /// var.a = 3; | ||||||
5218 | /// } | ||||||
5219 | /// | ||||||
5220 | Decl *Sema::BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, | ||||||
5221 | RecordDecl *Record) { | ||||||
5222 | assert(Record && "expected a record!")((Record && "expected a record!") ? static_cast<void > (0) : __assert_fail ("Record && \"expected a record!\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 5222, __PRETTY_FUNCTION__)); | ||||||
5223 | |||||||
5224 | // Mock up a declarator. | ||||||
5225 | Declarator Dc(DS, DeclaratorContext::TypeNameContext); | ||||||
5226 | TypeSourceInfo *TInfo = GetTypeForDeclarator(Dc, S); | ||||||
5227 | assert(TInfo && "couldn't build declarator info for anonymous struct")((TInfo && "couldn't build declarator info for anonymous struct" ) ? static_cast<void> (0) : __assert_fail ("TInfo && \"couldn't build declarator info for anonymous struct\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 5227, __PRETTY_FUNCTION__)); | ||||||
5228 | |||||||
5229 | auto *ParentDecl = cast<RecordDecl>(CurContext); | ||||||
5230 | QualType RecTy = Context.getTypeDeclType(Record); | ||||||
5231 | |||||||
5232 | // Create a declaration for this anonymous struct. | ||||||
5233 | NamedDecl *Anon = | ||||||
5234 | FieldDecl::Create(Context, ParentDecl, DS.getBeginLoc(), DS.getBeginLoc(), | ||||||
5235 | /*IdentifierInfo=*/nullptr, RecTy, TInfo, | ||||||
5236 | /*BitWidth=*/nullptr, /*Mutable=*/false, | ||||||
5237 | /*InitStyle=*/ICIS_NoInit); | ||||||
5238 | Anon->setImplicit(); | ||||||
5239 | |||||||
5240 | // Add the anonymous struct object to the current context. | ||||||
5241 | CurContext->addDecl(Anon); | ||||||
5242 | |||||||
5243 | // Inject the members of the anonymous struct into the current | ||||||
5244 | // context and into the identifier resolver chain for name lookup | ||||||
5245 | // purposes. | ||||||
5246 | SmallVector<NamedDecl*, 2> Chain; | ||||||
5247 | Chain.push_back(Anon); | ||||||
5248 | |||||||
5249 | RecordDecl *RecordDef = Record->getDefinition(); | ||||||
5250 | if (RequireCompleteType(Anon->getLocation(), RecTy, | ||||||
5251 | diag::err_field_incomplete) || | ||||||
5252 | InjectAnonymousStructOrUnionMembers(*this, S, CurContext, RecordDef, | ||||||
5253 | AS_none, Chain)) { | ||||||
5254 | Anon->setInvalidDecl(); | ||||||
5255 | ParentDecl->setInvalidDecl(); | ||||||
5256 | } | ||||||
5257 | |||||||
5258 | return Anon; | ||||||
5259 | } | ||||||
5260 | |||||||
5261 | /// GetNameForDeclarator - Determine the full declaration name for the | ||||||
5262 | /// given Declarator. | ||||||
5263 | DeclarationNameInfo Sema::GetNameForDeclarator(Declarator &D) { | ||||||
5264 | return GetNameFromUnqualifiedId(D.getName()); | ||||||
5265 | } | ||||||
5266 | |||||||
5267 | /// Retrieves the declaration name from a parsed unqualified-id. | ||||||
5268 | DeclarationNameInfo | ||||||
5269 | Sema::GetNameFromUnqualifiedId(const UnqualifiedId &Name) { | ||||||
5270 | DeclarationNameInfo NameInfo; | ||||||
5271 | NameInfo.setLoc(Name.StartLocation); | ||||||
5272 | |||||||
5273 | switch (Name.getKind()) { | ||||||
5274 | |||||||
5275 | case UnqualifiedIdKind::IK_ImplicitSelfParam: | ||||||
5276 | case UnqualifiedIdKind::IK_Identifier: | ||||||
5277 | NameInfo.setName(Name.Identifier); | ||||||
5278 | return NameInfo; | ||||||
5279 | |||||||
5280 | case UnqualifiedIdKind::IK_DeductionGuideName: { | ||||||
5281 | // C++ [temp.deduct.guide]p3: | ||||||
5282 | // The simple-template-id shall name a class template specialization. | ||||||
5283 | // The template-name shall be the same identifier as the template-name | ||||||
5284 | // of the simple-template-id. | ||||||
5285 | // These together intend to imply that the template-name shall name a | ||||||
5286 | // class template. | ||||||
5287 | // FIXME: template<typename T> struct X {}; | ||||||
5288 | // template<typename T> using Y = X<T>; | ||||||
5289 | // Y(int) -> Y<int>; | ||||||
5290 | // satisfies these rules but does not name a class template. | ||||||
5291 | TemplateName TN = Name.TemplateName.get().get(); | ||||||
5292 | auto *Template = TN.getAsTemplateDecl(); | ||||||
5293 | if (!Template || !isa<ClassTemplateDecl>(Template)) { | ||||||
5294 | Diag(Name.StartLocation, | ||||||
5295 | diag::err_deduction_guide_name_not_class_template) | ||||||
5296 | << (int)getTemplateNameKindForDiagnostics(TN) << TN; | ||||||
5297 | if (Template) | ||||||
5298 | Diag(Template->getLocation(), diag::note_template_decl_here); | ||||||
5299 | return DeclarationNameInfo(); | ||||||
5300 | } | ||||||
5301 | |||||||
5302 | NameInfo.setName( | ||||||
5303 | Context.DeclarationNames.getCXXDeductionGuideName(Template)); | ||||||
5304 | return NameInfo; | ||||||
5305 | } | ||||||
5306 | |||||||
5307 | case UnqualifiedIdKind::IK_OperatorFunctionId: | ||||||
5308 | NameInfo.setName(Context.DeclarationNames.getCXXOperatorName( | ||||||
5309 | Name.OperatorFunctionId.Operator)); | ||||||
5310 | NameInfo.getInfo().CXXOperatorName.BeginOpNameLoc | ||||||
5311 | = Name.OperatorFunctionId.SymbolLocations[0]; | ||||||
5312 | NameInfo.getInfo().CXXOperatorName.EndOpNameLoc | ||||||
5313 | = Name.EndLocation.getRawEncoding(); | ||||||
5314 | return NameInfo; | ||||||
5315 | |||||||
5316 | case UnqualifiedIdKind::IK_LiteralOperatorId: | ||||||
5317 | NameInfo.setName(Context.DeclarationNames.getCXXLiteralOperatorName( | ||||||
5318 | Name.Identifier)); | ||||||
5319 | NameInfo.setCXXLiteralOperatorNameLoc(Name.EndLocation); | ||||||
5320 | return NameInfo; | ||||||
5321 | |||||||
5322 | case UnqualifiedIdKind::IK_ConversionFunctionId: { | ||||||
5323 | TypeSourceInfo *TInfo; | ||||||
5324 | QualType Ty = GetTypeFromParser(Name.ConversionFunctionId, &TInfo); | ||||||
5325 | if (Ty.isNull()) | ||||||
5326 | return DeclarationNameInfo(); | ||||||
5327 | NameInfo.setName(Context.DeclarationNames.getCXXConversionFunctionName( | ||||||
5328 | Context.getCanonicalType(Ty))); | ||||||
5329 | NameInfo.setNamedTypeInfo(TInfo); | ||||||
5330 | return NameInfo; | ||||||
5331 | } | ||||||
5332 | |||||||
5333 | case UnqualifiedIdKind::IK_ConstructorName: { | ||||||
5334 | TypeSourceInfo *TInfo; | ||||||
5335 | QualType Ty = GetTypeFromParser(Name.ConstructorName, &TInfo); | ||||||
5336 | if (Ty.isNull()) | ||||||
5337 | return DeclarationNameInfo(); | ||||||
5338 | NameInfo.setName(Context.DeclarationNames.getCXXConstructorName( | ||||||
5339 | Context.getCanonicalType(Ty))); | ||||||
5340 | NameInfo.setNamedTypeInfo(TInfo); | ||||||
5341 | return NameInfo; | ||||||
5342 | } | ||||||
5343 | |||||||
5344 | case UnqualifiedIdKind::IK_ConstructorTemplateId: { | ||||||
5345 | // In well-formed code, we can only have a constructor | ||||||
5346 | // template-id that refers to the current context, so go there | ||||||
5347 | // to find the actual type being constructed. | ||||||
5348 | CXXRecordDecl *CurClass = dyn_cast<CXXRecordDecl>(CurContext); | ||||||
5349 | if (!CurClass || CurClass->getIdentifier() != Name.TemplateId->Name) | ||||||
5350 | return DeclarationNameInfo(); | ||||||
5351 | |||||||
5352 | // Determine the type of the class being constructed. | ||||||
5353 | QualType CurClassType = Context.getTypeDeclType(CurClass); | ||||||
5354 | |||||||
5355 | // FIXME: Check two things: that the template-id names the same type as | ||||||
5356 | // CurClassType, and that the template-id does not occur when the name | ||||||
5357 | // was qualified. | ||||||
5358 | |||||||
5359 | NameInfo.setName(Context.DeclarationNames.getCXXConstructorName( | ||||||
5360 | Context.getCanonicalType(CurClassType))); | ||||||
5361 | // FIXME: should we retrieve TypeSourceInfo? | ||||||
5362 | NameInfo.setNamedTypeInfo(nullptr); | ||||||
5363 | return NameInfo; | ||||||
5364 | } | ||||||
5365 | |||||||
5366 | case UnqualifiedIdKind::IK_DestructorName: { | ||||||
5367 | TypeSourceInfo *TInfo; | ||||||
5368 | QualType Ty = GetTypeFromParser(Name.DestructorName, &TInfo); | ||||||
5369 | if (Ty.isNull()) | ||||||
5370 | return DeclarationNameInfo(); | ||||||
5371 | NameInfo.setName(Context.DeclarationNames.getCXXDestructorName( | ||||||
5372 | Context.getCanonicalType(Ty))); | ||||||
5373 | NameInfo.setNamedTypeInfo(TInfo); | ||||||
5374 | return NameInfo; | ||||||
5375 | } | ||||||
5376 | |||||||
5377 | case UnqualifiedIdKind::IK_TemplateId: { | ||||||
5378 | TemplateName TName = Name.TemplateId->Template.get(); | ||||||
5379 | SourceLocation TNameLoc = Name.TemplateId->TemplateNameLoc; | ||||||
5380 | return Context.getNameForTemplate(TName, TNameLoc); | ||||||
5381 | } | ||||||
5382 | |||||||
5383 | } // switch (Name.getKind()) | ||||||
5384 | |||||||
5385 | llvm_unreachable("Unknown name kind")::llvm::llvm_unreachable_internal("Unknown name kind", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 5385); | ||||||
5386 | } | ||||||
5387 | |||||||
5388 | static QualType getCoreType(QualType Ty) { | ||||||
5389 | do { | ||||||
5390 | if (Ty->isPointerType() || Ty->isReferenceType()) | ||||||
5391 | Ty = Ty->getPointeeType(); | ||||||
5392 | else if (Ty->isArrayType()) | ||||||
5393 | Ty = Ty->castAsArrayTypeUnsafe()->getElementType(); | ||||||
5394 | else | ||||||
5395 | return Ty.withoutLocalFastQualifiers(); | ||||||
5396 | } while (true); | ||||||
5397 | } | ||||||
5398 | |||||||
5399 | /// hasSimilarParameters - Determine whether the C++ functions Declaration | ||||||
5400 | /// and Definition have "nearly" matching parameters. This heuristic is | ||||||
5401 | /// used to improve diagnostics in the case where an out-of-line function | ||||||
5402 | /// definition doesn't match any declaration within the class or namespace. | ||||||
5403 | /// Also sets Params to the list of indices to the parameters that differ | ||||||
5404 | /// between the declaration and the definition. If hasSimilarParameters | ||||||
5405 | /// returns true and Params is empty, then all of the parameters match. | ||||||
5406 | static bool hasSimilarParameters(ASTContext &Context, | ||||||
5407 | FunctionDecl *Declaration, | ||||||
5408 | FunctionDecl *Definition, | ||||||
5409 | SmallVectorImpl<unsigned> &Params) { | ||||||
5410 | Params.clear(); | ||||||
5411 | if (Declaration->param_size() != Definition->param_size()) | ||||||
5412 | return false; | ||||||
5413 | for (unsigned Idx = 0; Idx < Declaration->param_size(); ++Idx) { | ||||||
5414 | QualType DeclParamTy = Declaration->getParamDecl(Idx)->getType(); | ||||||
5415 | QualType DefParamTy = Definition->getParamDecl(Idx)->getType(); | ||||||
5416 | |||||||
5417 | // The parameter types are identical | ||||||
5418 | if (Context.hasSameUnqualifiedType(DefParamTy, DeclParamTy)) | ||||||
5419 | continue; | ||||||
5420 | |||||||
5421 | QualType DeclParamBaseTy = getCoreType(DeclParamTy); | ||||||
5422 | QualType DefParamBaseTy = getCoreType(DefParamTy); | ||||||
5423 | const IdentifierInfo *DeclTyName = DeclParamBaseTy.getBaseTypeIdentifier(); | ||||||
5424 | const IdentifierInfo *DefTyName = DefParamBaseTy.getBaseTypeIdentifier(); | ||||||
5425 | |||||||
5426 | if (Context.hasSameUnqualifiedType(DeclParamBaseTy, DefParamBaseTy) || | ||||||
5427 | (DeclTyName && DeclTyName == DefTyName)) | ||||||
5428 | Params.push_back(Idx); | ||||||
5429 | else // The two parameters aren't even close | ||||||
5430 | return false; | ||||||
5431 | } | ||||||
5432 | |||||||
5433 | return true; | ||||||
5434 | } | ||||||
5435 | |||||||
5436 | /// NeedsRebuildingInCurrentInstantiation - Checks whether the given | ||||||
5437 | /// declarator needs to be rebuilt in the current instantiation. | ||||||
5438 | /// Any bits of declarator which appear before the name are valid for | ||||||
5439 | /// consideration here. That's specifically the type in the decl spec | ||||||
5440 | /// and the base type in any member-pointer chunks. | ||||||
5441 | static bool RebuildDeclaratorInCurrentInstantiation(Sema &S, Declarator &D, | ||||||
5442 | DeclarationName Name) { | ||||||
5443 | // The types we specifically need to rebuild are: | ||||||
5444 | // - typenames, typeofs, and decltypes | ||||||
5445 | // - types which will become injected class names | ||||||
5446 | // Of course, we also need to rebuild any type referencing such a | ||||||
5447 | // type. It's safest to just say "dependent", but we call out a | ||||||
5448 | // few cases here. | ||||||
5449 | |||||||
5450 | DeclSpec &DS = D.getMutableDeclSpec(); | ||||||
5451 | switch (DS.getTypeSpecType()) { | ||||||
5452 | case DeclSpec::TST_typename: | ||||||
5453 | case DeclSpec::TST_typeofType: | ||||||
5454 | case DeclSpec::TST_underlyingType: | ||||||
5455 | case DeclSpec::TST_atomic: { | ||||||
5456 | // Grab the type from the parser. | ||||||
5457 | TypeSourceInfo *TSI = nullptr; | ||||||
5458 | QualType T = S.GetTypeFromParser(DS.getRepAsType(), &TSI); | ||||||
5459 | if (T.isNull() || !T->isDependentType()) break; | ||||||
5460 | |||||||
5461 | // Make sure there's a type source info. This isn't really much | ||||||
5462 | // of a waste; most dependent types should have type source info | ||||||
5463 | // attached already. | ||||||
5464 | if (!TSI) | ||||||
5465 | TSI = S.Context.getTrivialTypeSourceInfo(T, DS.getTypeSpecTypeLoc()); | ||||||
5466 | |||||||
5467 | // Rebuild the type in the current instantiation. | ||||||
5468 | TSI = S.RebuildTypeInCurrentInstantiation(TSI, D.getIdentifierLoc(), Name); | ||||||
5469 | if (!TSI) return true; | ||||||
5470 | |||||||
5471 | // Store the new type back in the decl spec. | ||||||
5472 | ParsedType LocType = S.CreateParsedType(TSI->getType(), TSI); | ||||||
5473 | DS.UpdateTypeRep(LocType); | ||||||
5474 | break; | ||||||
5475 | } | ||||||
5476 | |||||||
5477 | case DeclSpec::TST_decltype: | ||||||
5478 | case DeclSpec::TST_typeofExpr: { | ||||||
5479 | Expr *E = DS.getRepAsExpr(); | ||||||
5480 | ExprResult Result = S.RebuildExprInCurrentInstantiation(E); | ||||||
5481 | if (Result.isInvalid()) return true; | ||||||
5482 | DS.UpdateExprRep(Result.get()); | ||||||
5483 | break; | ||||||
5484 | } | ||||||
5485 | |||||||
5486 | default: | ||||||
5487 | // Nothing to do for these decl specs. | ||||||
5488 | break; | ||||||
5489 | } | ||||||
5490 | |||||||
5491 | // It doesn't matter what order we do this in. | ||||||
5492 | for (unsigned I = 0, E = D.getNumTypeObjects(); I != E; ++I) { | ||||||
5493 | DeclaratorChunk &Chunk = D.getTypeObject(I); | ||||||
5494 | |||||||
5495 | // The only type information in the declarator which can come | ||||||
5496 | // before the declaration name is the base type of a member | ||||||
5497 | // pointer. | ||||||
5498 | if (Chunk.Kind != DeclaratorChunk::MemberPointer) | ||||||
5499 | continue; | ||||||
5500 | |||||||
5501 | // Rebuild the scope specifier in-place. | ||||||
5502 | CXXScopeSpec &SS = Chunk.Mem.Scope(); | ||||||
5503 | if (S.RebuildNestedNameSpecifierInCurrentInstantiation(SS)) | ||||||
5504 | return true; | ||||||
5505 | } | ||||||
5506 | |||||||
5507 | return false; | ||||||
5508 | } | ||||||
5509 | |||||||
5510 | Decl *Sema::ActOnDeclarator(Scope *S, Declarator &D) { | ||||||
5511 | D.setFunctionDefinitionKind(FDK_Declaration); | ||||||
5512 | Decl *Dcl = HandleDeclarator(S, D, MultiTemplateParamsArg()); | ||||||
5513 | |||||||
5514 | if (OriginalLexicalContext && OriginalLexicalContext->isObjCContainer() && | ||||||
5515 | Dcl && Dcl->getDeclContext()->isFileContext()) | ||||||
5516 | Dcl->setTopLevelDeclInObjCContainer(); | ||||||
5517 | |||||||
5518 | if (getLangOpts().OpenCL) | ||||||
5519 | setCurrentOpenCLExtensionForDecl(Dcl); | ||||||
5520 | |||||||
5521 | return Dcl; | ||||||
5522 | } | ||||||
5523 | |||||||
5524 | /// DiagnoseClassNameShadow - Implement C++ [class.mem]p13: | ||||||
5525 | /// If T is the name of a class, then each of the following shall have a | ||||||
5526 | /// name different from T: | ||||||
5527 | /// - every static data member of class T; | ||||||
5528 | /// - every member function of class T | ||||||
5529 | /// - every member of class T that is itself a type; | ||||||
5530 | /// \returns true if the declaration name violates these rules. | ||||||
5531 | bool Sema::DiagnoseClassNameShadow(DeclContext *DC, | ||||||
5532 | DeclarationNameInfo NameInfo) { | ||||||
5533 | DeclarationName Name = NameInfo.getName(); | ||||||
5534 | |||||||
5535 | CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(DC); | ||||||
5536 | while (Record && Record->isAnonymousStructOrUnion()) | ||||||
5537 | Record = dyn_cast<CXXRecordDecl>(Record->getParent()); | ||||||
5538 | if (Record && Record->getIdentifier() && Record->getDeclName() == Name) { | ||||||
5539 | Diag(NameInfo.getLoc(), diag::err_member_name_of_class) << Name; | ||||||
5540 | return true; | ||||||
5541 | } | ||||||
5542 | |||||||
5543 | return false; | ||||||
5544 | } | ||||||
5545 | |||||||
5546 | /// Diagnose a declaration whose declarator-id has the given | ||||||
5547 | /// nested-name-specifier. | ||||||
5548 | /// | ||||||
5549 | /// \param SS The nested-name-specifier of the declarator-id. | ||||||
5550 | /// | ||||||
5551 | /// \param DC The declaration context to which the nested-name-specifier | ||||||
5552 | /// resolves. | ||||||
5553 | /// | ||||||
5554 | /// \param Name The name of the entity being declared. | ||||||
5555 | /// | ||||||
5556 | /// \param Loc The location of the name of the entity being declared. | ||||||
5557 | /// | ||||||
5558 | /// \param IsTemplateId Whether the name is a (simple-)template-id, and thus | ||||||
5559 | /// we're declaring an explicit / partial specialization / instantiation. | ||||||
5560 | /// | ||||||
5561 | /// \returns true if we cannot safely recover from this error, false otherwise. | ||||||
5562 | bool Sema::diagnoseQualifiedDeclaration(CXXScopeSpec &SS, DeclContext *DC, | ||||||
5563 | DeclarationName Name, | ||||||
5564 | SourceLocation Loc, bool IsTemplateId) { | ||||||
5565 | DeclContext *Cur = CurContext; | ||||||
5566 | while (isa<LinkageSpecDecl>(Cur) || isa<CapturedDecl>(Cur)) | ||||||
5567 | Cur = Cur->getParent(); | ||||||
5568 | |||||||
5569 | // If the user provided a superfluous scope specifier that refers back to the | ||||||
5570 | // class in which the entity is already declared, diagnose and ignore it. | ||||||
5571 | // | ||||||
5572 | // class X { | ||||||
5573 | // void X::f(); | ||||||
5574 | // }; | ||||||
5575 | // | ||||||
5576 | // Note, it was once ill-formed to give redundant qualification in all | ||||||
5577 | // contexts, but that rule was removed by DR482. | ||||||
5578 | if (Cur->Equals(DC)) { | ||||||
5579 | if (Cur->isRecord()) { | ||||||
5580 | Diag(Loc, LangOpts.MicrosoftExt ? diag::warn_member_extra_qualification | ||||||
5581 | : diag::err_member_extra_qualification) | ||||||
5582 | << Name << FixItHint::CreateRemoval(SS.getRange()); | ||||||
5583 | SS.clear(); | ||||||
5584 | } else { | ||||||
5585 | Diag(Loc, diag::warn_namespace_member_extra_qualification) << Name; | ||||||
5586 | } | ||||||
5587 | return false; | ||||||
5588 | } | ||||||
5589 | |||||||
5590 | // Check whether the qualifying scope encloses the scope of the original | ||||||
5591 | // declaration. For a template-id, we perform the checks in | ||||||
5592 | // CheckTemplateSpecializationScope. | ||||||
5593 | if (!Cur->Encloses(DC) && !IsTemplateId) { | ||||||
5594 | if (Cur->isRecord()) | ||||||
5595 | Diag(Loc, diag::err_member_qualification) | ||||||
5596 | << Name << SS.getRange(); | ||||||
5597 | else if (isa<TranslationUnitDecl>(DC)) | ||||||
5598 | Diag(Loc, diag::err_invalid_declarator_global_scope) | ||||||
5599 | << Name << SS.getRange(); | ||||||
5600 | else if (isa<FunctionDecl>(Cur)) | ||||||
5601 | Diag(Loc, diag::err_invalid_declarator_in_function) | ||||||
5602 | << Name << SS.getRange(); | ||||||
5603 | else if (isa<BlockDecl>(Cur)) | ||||||
5604 | Diag(Loc, diag::err_invalid_declarator_in_block) | ||||||
5605 | << Name << SS.getRange(); | ||||||
5606 | else | ||||||
5607 | Diag(Loc, diag::err_invalid_declarator_scope) | ||||||
5608 | << Name << cast<NamedDecl>(Cur) << cast<NamedDecl>(DC) << SS.getRange(); | ||||||
5609 | |||||||
5610 | return true; | ||||||
5611 | } | ||||||
5612 | |||||||
5613 | if (Cur->isRecord()) { | ||||||
5614 | // Cannot qualify members within a class. | ||||||
5615 | Diag(Loc, diag::err_member_qualification) | ||||||
5616 | << Name << SS.getRange(); | ||||||
5617 | SS.clear(); | ||||||
5618 | |||||||
5619 | // C++ constructors and destructors with incorrect scopes can break | ||||||
5620 | // our AST invariants by having the wrong underlying types. If | ||||||
5621 | // that's the case, then drop this declaration entirely. | ||||||
5622 | if ((Name.getNameKind() == DeclarationName::CXXConstructorName || | ||||||
5623 | Name.getNameKind() == DeclarationName::CXXDestructorName) && | ||||||
5624 | !Context.hasSameType(Name.getCXXNameType(), | ||||||
5625 | Context.getTypeDeclType(cast<CXXRecordDecl>(Cur)))) | ||||||
5626 | return true; | ||||||
5627 | |||||||
5628 | return false; | ||||||
5629 | } | ||||||
5630 | |||||||
5631 | // C++11 [dcl.meaning]p1: | ||||||
5632 | // [...] "The nested-name-specifier of the qualified declarator-id shall | ||||||
5633 | // not begin with a decltype-specifer" | ||||||
5634 | NestedNameSpecifierLoc SpecLoc(SS.getScopeRep(), SS.location_data()); | ||||||
5635 | while (SpecLoc.getPrefix()) | ||||||
5636 | SpecLoc = SpecLoc.getPrefix(); | ||||||
5637 | if (dyn_cast_or_null<DecltypeType>( | ||||||
5638 | SpecLoc.getNestedNameSpecifier()->getAsType())) | ||||||
5639 | Diag(Loc, diag::err_decltype_in_declarator) | ||||||
5640 | << SpecLoc.getTypeLoc().getSourceRange(); | ||||||
5641 | |||||||
5642 | return false; | ||||||
5643 | } | ||||||
5644 | |||||||
5645 | NamedDecl *Sema::HandleDeclarator(Scope *S, Declarator &D, | ||||||
5646 | MultiTemplateParamsArg TemplateParamLists) { | ||||||
5647 | // TODO: consider using NameInfo for diagnostic. | ||||||
5648 | DeclarationNameInfo NameInfo = GetNameForDeclarator(D); | ||||||
5649 | DeclarationName Name = NameInfo.getName(); | ||||||
5650 | |||||||
5651 | // All of these full declarators require an identifier. If it doesn't have | ||||||
5652 | // one, the ParsedFreeStandingDeclSpec action should be used. | ||||||
5653 | if (D.isDecompositionDeclarator()) { | ||||||
5654 | return ActOnDecompositionDeclarator(S, D, TemplateParamLists); | ||||||
5655 | } else if (!Name) { | ||||||
5656 | if (!D.isInvalidType()) // Reject this if we think it is valid. | ||||||
5657 | Diag(D.getDeclSpec().getBeginLoc(), diag::err_declarator_need_ident) | ||||||
5658 | << D.getDeclSpec().getSourceRange() << D.getSourceRange(); | ||||||
5659 | return nullptr; | ||||||
5660 | } else if (DiagnoseUnexpandedParameterPack(NameInfo, UPPC_DeclarationType)) | ||||||
5661 | return nullptr; | ||||||
5662 | |||||||
5663 | // The scope passed in may not be a decl scope. Zip up the scope tree until | ||||||
5664 | // we find one that is. | ||||||
5665 | while ((S->getFlags() & Scope::DeclScope) == 0 || | ||||||
5666 | (S->getFlags() & Scope::TemplateParamScope) != 0) | ||||||
5667 | S = S->getParent(); | ||||||
5668 | |||||||
5669 | DeclContext *DC = CurContext; | ||||||
5670 | if (D.getCXXScopeSpec().isInvalid()) | ||||||
5671 | D.setInvalidType(); | ||||||
5672 | else if (D.getCXXScopeSpec().isSet()) { | ||||||
5673 | if (DiagnoseUnexpandedParameterPack(D.getCXXScopeSpec(), | ||||||
5674 | UPPC_DeclarationQualifier)) | ||||||
5675 | return nullptr; | ||||||
5676 | |||||||
5677 | bool EnteringContext = !D.getDeclSpec().isFriendSpecified(); | ||||||
5678 | DC = computeDeclContext(D.getCXXScopeSpec(), EnteringContext); | ||||||
5679 | if (!DC || isa<EnumDecl>(DC)) { | ||||||
5680 | // If we could not compute the declaration context, it's because the | ||||||
5681 | // declaration context is dependent but does not refer to a class, | ||||||
5682 | // class template, or class template partial specialization. Complain | ||||||
5683 | // and return early, to avoid the coming semantic disaster. | ||||||
5684 | Diag(D.getIdentifierLoc(), | ||||||
5685 | diag::err_template_qualified_declarator_no_match) | ||||||
5686 | << D.getCXXScopeSpec().getScopeRep() | ||||||
5687 | << D.getCXXScopeSpec().getRange(); | ||||||
5688 | return nullptr; | ||||||
5689 | } | ||||||
5690 | bool IsDependentContext = DC->isDependentContext(); | ||||||
5691 | |||||||
5692 | if (!IsDependentContext && | ||||||
5693 | RequireCompleteDeclContext(D.getCXXScopeSpec(), DC)) | ||||||
5694 | return nullptr; | ||||||
5695 | |||||||
5696 | // If a class is incomplete, do not parse entities inside it. | ||||||
5697 | if (isa<CXXRecordDecl>(DC) && !cast<CXXRecordDecl>(DC)->hasDefinition()) { | ||||||
5698 | Diag(D.getIdentifierLoc(), | ||||||
5699 | diag::err_member_def_undefined_record) | ||||||
5700 | << Name << DC << D.getCXXScopeSpec().getRange(); | ||||||
5701 | return nullptr; | ||||||
5702 | } | ||||||
5703 | if (!D.getDeclSpec().isFriendSpecified()) { | ||||||
5704 | if (diagnoseQualifiedDeclaration( | ||||||
5705 | D.getCXXScopeSpec(), DC, Name, D.getIdentifierLoc(), | ||||||
5706 | D.getName().getKind() == UnqualifiedIdKind::IK_TemplateId)) { | ||||||
5707 | if (DC->isRecord()) | ||||||
5708 | return nullptr; | ||||||
5709 | |||||||
5710 | D.setInvalidType(); | ||||||
5711 | } | ||||||
5712 | } | ||||||
5713 | |||||||
5714 | // Check whether we need to rebuild the type of the given | ||||||
5715 | // declaration in the current instantiation. | ||||||
5716 | if (EnteringContext && IsDependentContext && | ||||||
5717 | TemplateParamLists.size() != 0) { | ||||||
5718 | ContextRAII SavedContext(*this, DC); | ||||||
5719 | if (RebuildDeclaratorInCurrentInstantiation(*this, D, Name)) | ||||||
5720 | D.setInvalidType(); | ||||||
5721 | } | ||||||
5722 | } | ||||||
5723 | |||||||
5724 | TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S); | ||||||
5725 | QualType R = TInfo->getType(); | ||||||
5726 | |||||||
5727 | if (DiagnoseUnexpandedParameterPack(D.getIdentifierLoc(), TInfo, | ||||||
5728 | UPPC_DeclarationType)) | ||||||
5729 | D.setInvalidType(); | ||||||
5730 | |||||||
5731 | LookupResult Previous(*this, NameInfo, LookupOrdinaryName, | ||||||
5732 | forRedeclarationInCurContext()); | ||||||
5733 | |||||||
5734 | // See if this is a redefinition of a variable in the same scope. | ||||||
5735 | if (!D.getCXXScopeSpec().isSet()) { | ||||||
5736 | bool IsLinkageLookup = false; | ||||||
5737 | bool CreateBuiltins = false; | ||||||
5738 | |||||||
5739 | // If the declaration we're planning to build will be a function | ||||||
5740 | // or object with linkage, then look for another declaration with | ||||||
5741 | // linkage (C99 6.2.2p4-5 and C++ [basic.link]p6). | ||||||
5742 | // | ||||||
5743 | // If the declaration we're planning to build will be declared with | ||||||
5744 | // external linkage in the translation unit, create any builtin with | ||||||
5745 | // the same name. | ||||||
5746 | if (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef) | ||||||
5747 | /* Do nothing*/; | ||||||
5748 | else if (CurContext->isFunctionOrMethod() && | ||||||
5749 | (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_extern || | ||||||
5750 | R->isFunctionType())) { | ||||||
5751 | IsLinkageLookup = true; | ||||||
5752 | CreateBuiltins = | ||||||
5753 | CurContext->getEnclosingNamespaceContext()->isTranslationUnit(); | ||||||
5754 | } else if (CurContext->getRedeclContext()->isTranslationUnit() && | ||||||
5755 | D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_static) | ||||||
5756 | CreateBuiltins = true; | ||||||
5757 | |||||||
5758 | if (IsLinkageLookup) { | ||||||
5759 | Previous.clear(LookupRedeclarationWithLinkage); | ||||||
5760 | Previous.setRedeclarationKind(ForExternalRedeclaration); | ||||||
5761 | } | ||||||
5762 | |||||||
5763 | LookupName(Previous, S, CreateBuiltins); | ||||||
5764 | } else { // Something like "int foo::x;" | ||||||
5765 | LookupQualifiedName(Previous, DC); | ||||||
5766 | |||||||
5767 | // C++ [dcl.meaning]p1: | ||||||
5768 | // When the declarator-id is qualified, the declaration shall refer to a | ||||||
5769 | // previously declared member of the class or namespace to which the | ||||||
5770 | // qualifier refers (or, in the case of a namespace, of an element of the | ||||||
5771 | // inline namespace set of that namespace (7.3.1)) or to a specialization | ||||||
5772 | // thereof; [...] | ||||||
5773 | // | ||||||
5774 | // Note that we already checked the context above, and that we do not have | ||||||
5775 | // enough information to make sure that Previous contains the declaration | ||||||
5776 | // we want to match. For example, given: | ||||||
5777 | // | ||||||
5778 | // class X { | ||||||
5779 | // void f(); | ||||||
5780 | // void f(float); | ||||||
5781 | // }; | ||||||
5782 | // | ||||||
5783 | // void X::f(int) { } // ill-formed | ||||||
5784 | // | ||||||
5785 | // In this case, Previous will point to the overload set | ||||||
5786 | // containing the two f's declared in X, but neither of them | ||||||
5787 | // matches. | ||||||
5788 | |||||||
5789 | // C++ [dcl.meaning]p1: | ||||||
5790 | // [...] the member shall not merely have been introduced by a | ||||||
5791 | // using-declaration in the scope of the class or namespace nominated by | ||||||
5792 | // the nested-name-specifier of the declarator-id. | ||||||
5793 | RemoveUsingDecls(Previous); | ||||||
5794 | } | ||||||
5795 | |||||||
5796 | if (Previous.isSingleResult() && | ||||||
5797 | Previous.getFoundDecl()->isTemplateParameter()) { | ||||||
5798 | // Maybe we will complain about the shadowed template parameter. | ||||||
5799 | if (!D.isInvalidType()) | ||||||
5800 | DiagnoseTemplateParameterShadow(D.getIdentifierLoc(), | ||||||
5801 | Previous.getFoundDecl()); | ||||||
5802 | |||||||
5803 | // Just pretend that we didn't see the previous declaration. | ||||||
5804 | Previous.clear(); | ||||||
5805 | } | ||||||
5806 | |||||||
5807 | if (!R->isFunctionType() && DiagnoseClassNameShadow(DC, NameInfo)) | ||||||
5808 | // Forget that the previous declaration is the injected-class-name. | ||||||
5809 | Previous.clear(); | ||||||
5810 | |||||||
5811 | // In C++, the previous declaration we find might be a tag type | ||||||
5812 | // (class or enum). In this case, the new declaration will hide the | ||||||
5813 | // tag type. Note that this applies to functions, function templates, and | ||||||
5814 | // variables, but not to typedefs (C++ [dcl.typedef]p4) or variable templates. | ||||||
5815 | if (Previous.isSingleTagDecl() && | ||||||
5816 | D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_typedef && | ||||||
5817 | (TemplateParamLists.size() == 0 || R->isFunctionType())) | ||||||
5818 | Previous.clear(); | ||||||
5819 | |||||||
5820 | // Check that there are no default arguments other than in the parameters | ||||||
5821 | // of a function declaration (C++ only). | ||||||
5822 | if (getLangOpts().CPlusPlus) | ||||||
5823 | CheckExtraCXXDefaultArguments(D); | ||||||
5824 | |||||||
5825 | NamedDecl *New; | ||||||
5826 | |||||||
5827 | bool AddToScope = true; | ||||||
5828 | if (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef) { | ||||||
5829 | if (TemplateParamLists.size()) { | ||||||
5830 | Diag(D.getIdentifierLoc(), diag::err_template_typedef); | ||||||
5831 | return nullptr; | ||||||
5832 | } | ||||||
5833 | |||||||
5834 | New = ActOnTypedefDeclarator(S, D, DC, TInfo, Previous); | ||||||
5835 | } else if (R->isFunctionType()) { | ||||||
5836 | New = ActOnFunctionDeclarator(S, D, DC, TInfo, Previous, | ||||||
5837 | TemplateParamLists, | ||||||
5838 | AddToScope); | ||||||
5839 | } else { | ||||||
5840 | New = ActOnVariableDeclarator(S, D, DC, TInfo, Previous, TemplateParamLists, | ||||||
5841 | AddToScope); | ||||||
5842 | } | ||||||
5843 | |||||||
5844 | if (!New) | ||||||
5845 | return nullptr; | ||||||
5846 | |||||||
5847 | // If this has an identifier and is not a function template specialization, | ||||||
5848 | // add it to the scope stack. | ||||||
5849 | if (New->getDeclName() && AddToScope) | ||||||
5850 | PushOnScopeChains(New, S); | ||||||
5851 | |||||||
5852 | if (isInOpenMPDeclareTargetContext()) | ||||||
5853 | checkDeclIsAllowedInOpenMPTarget(nullptr, New); | ||||||
5854 | |||||||
5855 | return New; | ||||||
5856 | } | ||||||
5857 | |||||||
5858 | /// Helper method to turn variable array types into constant array | ||||||
5859 | /// types in certain situations which would otherwise be errors (for | ||||||
5860 | /// GCC compatibility). | ||||||
5861 | static QualType TryToFixInvalidVariablyModifiedType(QualType T, | ||||||
5862 | ASTContext &Context, | ||||||
5863 | bool &SizeIsNegative, | ||||||
5864 | llvm::APSInt &Oversized) { | ||||||
5865 | // This method tries to turn a variable array into a constant | ||||||
5866 | // array even when the size isn't an ICE. This is necessary | ||||||
5867 | // for compatibility with code that depends on gcc's buggy | ||||||
5868 | // constant expression folding, like struct {char x[(int)(char*)2];} | ||||||
5869 | SizeIsNegative = false; | ||||||
5870 | Oversized = 0; | ||||||
5871 | |||||||
5872 | if (T->isDependentType()) | ||||||
5873 | return QualType(); | ||||||
5874 | |||||||
5875 | QualifierCollector Qs; | ||||||
5876 | const Type *Ty = Qs.strip(T); | ||||||
5877 | |||||||
5878 | if (const PointerType* PTy = dyn_cast<PointerType>(Ty)) { | ||||||
5879 | QualType Pointee = PTy->getPointeeType(); | ||||||
5880 | QualType FixedType = | ||||||
5881 | TryToFixInvalidVariablyModifiedType(Pointee, Context, SizeIsNegative, | ||||||
5882 | Oversized); | ||||||
5883 | if (FixedType.isNull()) return FixedType; | ||||||
5884 | FixedType = Context.getPointerType(FixedType); | ||||||
5885 | return Qs.apply(Context, FixedType); | ||||||
5886 | } | ||||||
5887 | if (const ParenType* PTy = dyn_cast<ParenType>(Ty)) { | ||||||
5888 | QualType Inner = PTy->getInnerType(); | ||||||
5889 | QualType FixedType = | ||||||
5890 | TryToFixInvalidVariablyModifiedType(Inner, Context, SizeIsNegative, | ||||||
5891 | Oversized); | ||||||
5892 | if (FixedType.isNull()) return FixedType; | ||||||
5893 | FixedType = Context.getParenType(FixedType); | ||||||
5894 | return Qs.apply(Context, FixedType); | ||||||
5895 | } | ||||||
5896 | |||||||
5897 | const VariableArrayType* VLATy = dyn_cast<VariableArrayType>(T); | ||||||
5898 | if (!VLATy) | ||||||
5899 | return QualType(); | ||||||
5900 | // FIXME: We should probably handle this case | ||||||
5901 | if (VLATy->getElementType()->isVariablyModifiedType()) | ||||||
5902 | return QualType(); | ||||||
5903 | |||||||
5904 | Expr::EvalResult Result; | ||||||
5905 | if (!VLATy->getSizeExpr() || | ||||||
5906 | !VLATy->getSizeExpr()->EvaluateAsInt(Result, Context)) | ||||||
5907 | return QualType(); | ||||||
5908 | |||||||
5909 | llvm::APSInt Res = Result.Val.getInt(); | ||||||
5910 | |||||||
5911 | // Check whether the array size is negative. | ||||||
5912 | if (Res.isSigned() && Res.isNegative()) { | ||||||
5913 | SizeIsNegative = true; | ||||||
5914 | return QualType(); | ||||||
5915 | } | ||||||
5916 | |||||||
5917 | // Check whether the array is too large to be addressed. | ||||||
5918 | unsigned ActiveSizeBits | ||||||
5919 | = ConstantArrayType::getNumAddressingBits(Context, VLATy->getElementType(), | ||||||
5920 | Res); | ||||||
5921 | if (ActiveSizeBits > ConstantArrayType::getMaxSizeBits(Context)) { | ||||||
5922 | Oversized = Res; | ||||||
5923 | return QualType(); | ||||||
5924 | } | ||||||
5925 | |||||||
5926 | return Context.getConstantArrayType( | ||||||
5927 | VLATy->getElementType(), Res, VLATy->getSizeExpr(), ArrayType::Normal, 0); | ||||||
5928 | } | ||||||
5929 | |||||||
5930 | static void | ||||||
5931 | FixInvalidVariablyModifiedTypeLoc(TypeLoc SrcTL, TypeLoc DstTL) { | ||||||
5932 | SrcTL = SrcTL.getUnqualifiedLoc(); | ||||||
5933 | DstTL = DstTL.getUnqualifiedLoc(); | ||||||
5934 | if (PointerTypeLoc SrcPTL = SrcTL.getAs<PointerTypeLoc>()) { | ||||||
5935 | PointerTypeLoc DstPTL = DstTL.castAs<PointerTypeLoc>(); | ||||||
5936 | FixInvalidVariablyModifiedTypeLoc(SrcPTL.getPointeeLoc(), | ||||||
5937 | DstPTL.getPointeeLoc()); | ||||||
5938 | DstPTL.setStarLoc(SrcPTL.getStarLoc()); | ||||||
5939 | return; | ||||||
5940 | } | ||||||
5941 | if (ParenTypeLoc SrcPTL = SrcTL.getAs<ParenTypeLoc>()) { | ||||||
5942 | ParenTypeLoc DstPTL = DstTL.castAs<ParenTypeLoc>(); | ||||||
5943 | FixInvalidVariablyModifiedTypeLoc(SrcPTL.getInnerLoc(), | ||||||
5944 | DstPTL.getInnerLoc()); | ||||||
5945 | DstPTL.setLParenLoc(SrcPTL.getLParenLoc()); | ||||||
5946 | DstPTL.setRParenLoc(SrcPTL.getRParenLoc()); | ||||||
5947 | return; | ||||||
5948 | } | ||||||
5949 | ArrayTypeLoc SrcATL = SrcTL.castAs<ArrayTypeLoc>(); | ||||||
5950 | ArrayTypeLoc DstATL = DstTL.castAs<ArrayTypeLoc>(); | ||||||
5951 | TypeLoc SrcElemTL = SrcATL.getElementLoc(); | ||||||
5952 | TypeLoc DstElemTL = DstATL.getElementLoc(); | ||||||
5953 | DstElemTL.initializeFullCopy(SrcElemTL); | ||||||
5954 | DstATL.setLBracketLoc(SrcATL.getLBracketLoc()); | ||||||
5955 | DstATL.setSizeExpr(SrcATL.getSizeExpr()); | ||||||
5956 | DstATL.setRBracketLoc(SrcATL.getRBracketLoc()); | ||||||
5957 | } | ||||||
5958 | |||||||
5959 | /// Helper method to turn variable array types into constant array | ||||||
5960 | /// types in certain situations which would otherwise be errors (for | ||||||
5961 | /// GCC compatibility). | ||||||
5962 | static TypeSourceInfo* | ||||||
5963 | TryToFixInvalidVariablyModifiedTypeSourceInfo(TypeSourceInfo *TInfo, | ||||||
5964 | ASTContext &Context, | ||||||
5965 | bool &SizeIsNegative, | ||||||
5966 | llvm::APSInt &Oversized) { | ||||||
5967 | QualType FixedTy | ||||||
5968 | = TryToFixInvalidVariablyModifiedType(TInfo->getType(), Context, | ||||||
5969 | SizeIsNegative, Oversized); | ||||||
5970 | if (FixedTy.isNull()) | ||||||
5971 | return nullptr; | ||||||
5972 | TypeSourceInfo *FixedTInfo = Context.getTrivialTypeSourceInfo(FixedTy); | ||||||
5973 | FixInvalidVariablyModifiedTypeLoc(TInfo->getTypeLoc(), | ||||||
5974 | FixedTInfo->getTypeLoc()); | ||||||
5975 | return FixedTInfo; | ||||||
5976 | } | ||||||
5977 | |||||||
5978 | /// Register the given locally-scoped extern "C" declaration so | ||||||
5979 | /// that it can be found later for redeclarations. We include any extern "C" | ||||||
5980 | /// declaration that is not visible in the translation unit here, not just | ||||||
5981 | /// function-scope declarations. | ||||||
5982 | void | ||||||
5983 | Sema::RegisterLocallyScopedExternCDecl(NamedDecl *ND, Scope *S) { | ||||||
5984 | if (!getLangOpts().CPlusPlus && | ||||||
5985 | ND->getLexicalDeclContext()->getRedeclContext()->isTranslationUnit()) | ||||||
5986 | // Don't need to track declarations in the TU in C. | ||||||
5987 | return; | ||||||
5988 | |||||||
5989 | // Note that we have a locally-scoped external with this name. | ||||||
5990 | Context.getExternCContextDecl()->makeDeclVisibleInContext(ND); | ||||||
5991 | } | ||||||
5992 | |||||||
5993 | NamedDecl *Sema::findLocallyScopedExternCDecl(DeclarationName Name) { | ||||||
5994 | // FIXME: We can have multiple results via __attribute__((overloadable)). | ||||||
5995 | auto Result = Context.getExternCContextDecl()->lookup(Name); | ||||||
5996 | return Result.empty() ? nullptr : *Result.begin(); | ||||||
5997 | } | ||||||
5998 | |||||||
5999 | /// Diagnose function specifiers on a declaration of an identifier that | ||||||
6000 | /// does not identify a function. | ||||||
6001 | void Sema::DiagnoseFunctionSpecifiers(const DeclSpec &DS) { | ||||||
6002 | // FIXME: We should probably indicate the identifier in question to avoid | ||||||
6003 | // confusion for constructs like "virtual int a(), b;" | ||||||
6004 | if (DS.isVirtualSpecified()) | ||||||
6005 | Diag(DS.getVirtualSpecLoc(), | ||||||
6006 | diag::err_virtual_non_function); | ||||||
6007 | |||||||
6008 | if (DS.hasExplicitSpecifier()) | ||||||
6009 | Diag(DS.getExplicitSpecLoc(), | ||||||
6010 | diag::err_explicit_non_function); | ||||||
6011 | |||||||
6012 | if (DS.isNoreturnSpecified()) | ||||||
6013 | Diag(DS.getNoreturnSpecLoc(), | ||||||
6014 | diag::err_noreturn_non_function); | ||||||
6015 | } | ||||||
6016 | |||||||
6017 | NamedDecl* | ||||||
6018 | Sema::ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, | ||||||
6019 | TypeSourceInfo *TInfo, LookupResult &Previous) { | ||||||
6020 | // Typedef declarators cannot be qualified (C++ [dcl.meaning]p1). | ||||||
6021 | if (D.getCXXScopeSpec().isSet()) { | ||||||
6022 | Diag(D.getIdentifierLoc(), diag::err_qualified_typedef_declarator) | ||||||
6023 | << D.getCXXScopeSpec().getRange(); | ||||||
6024 | D.setInvalidType(); | ||||||
6025 | // Pretend we didn't see the scope specifier. | ||||||
6026 | DC = CurContext; | ||||||
6027 | Previous.clear(); | ||||||
6028 | } | ||||||
6029 | |||||||
6030 | DiagnoseFunctionSpecifiers(D.getDeclSpec()); | ||||||
6031 | |||||||
6032 | if (D.getDeclSpec().isInlineSpecified()) | ||||||
6033 | Diag(D.getDeclSpec().getInlineSpecLoc(), diag::err_inline_non_function) | ||||||
6034 | << getLangOpts().CPlusPlus17; | ||||||
6035 | if (D.getDeclSpec().hasConstexprSpecifier()) | ||||||
6036 | Diag(D.getDeclSpec().getConstexprSpecLoc(), diag::err_invalid_constexpr) | ||||||
6037 | << 1 << D.getDeclSpec().getConstexprSpecifier(); | ||||||
6038 | |||||||
6039 | if (D.getName().Kind != UnqualifiedIdKind::IK_Identifier) { | ||||||
6040 | if (D.getName().Kind == UnqualifiedIdKind::IK_DeductionGuideName) | ||||||
6041 | Diag(D.getName().StartLocation, | ||||||
6042 | diag::err_deduction_guide_invalid_specifier) | ||||||
6043 | << "typedef"; | ||||||
6044 | else | ||||||
6045 | Diag(D.getName().StartLocation, diag::err_typedef_not_identifier) | ||||||
6046 | << D.getName().getSourceRange(); | ||||||
6047 | return nullptr; | ||||||
6048 | } | ||||||
6049 | |||||||
6050 | TypedefDecl *NewTD = ParseTypedefDecl(S, D, TInfo->getType(), TInfo); | ||||||
6051 | if (!NewTD) return nullptr; | ||||||
6052 | |||||||
6053 | // Handle attributes prior to checking for duplicates in MergeVarDecl | ||||||
6054 | ProcessDeclAttributes(S, NewTD, D); | ||||||
6055 | |||||||
6056 | CheckTypedefForVariablyModifiedType(S, NewTD); | ||||||
6057 | |||||||
6058 | bool Redeclaration = D.isRedeclaration(); | ||||||
6059 | NamedDecl *ND = ActOnTypedefNameDecl(S, DC, NewTD, Previous, Redeclaration); | ||||||
6060 | D.setRedeclaration(Redeclaration); | ||||||
6061 | return ND; | ||||||
6062 | } | ||||||
6063 | |||||||
6064 | void | ||||||
6065 | Sema::CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *NewTD) { | ||||||
6066 | // C99 6.7.7p2: If a typedef name specifies a variably modified type | ||||||
6067 | // then it shall have block scope. | ||||||
6068 | // Note that variably modified types must be fixed before merging the decl so | ||||||
6069 | // that redeclarations will match. | ||||||
6070 | TypeSourceInfo *TInfo = NewTD->getTypeSourceInfo(); | ||||||
6071 | QualType T = TInfo->getType(); | ||||||
6072 | if (T->isVariablyModifiedType()) { | ||||||
6073 | setFunctionHasBranchProtectedScope(); | ||||||
6074 | |||||||
6075 | if (S->getFnParent() == nullptr) { | ||||||
6076 | bool SizeIsNegative; | ||||||
6077 | llvm::APSInt Oversized; | ||||||
6078 | TypeSourceInfo *FixedTInfo = | ||||||
6079 | TryToFixInvalidVariablyModifiedTypeSourceInfo(TInfo, Context, | ||||||
6080 | SizeIsNegative, | ||||||
6081 | Oversized); | ||||||
6082 | if (FixedTInfo) { | ||||||
6083 | Diag(NewTD->getLocation(), diag::warn_illegal_constant_array_size); | ||||||
6084 | NewTD->setTypeSourceInfo(FixedTInfo); | ||||||
6085 | } else { | ||||||
6086 | if (SizeIsNegative) | ||||||
6087 | Diag(NewTD->getLocation(), diag::err_typecheck_negative_array_size); | ||||||
6088 | else if (T->isVariableArrayType()) | ||||||
6089 | Diag(NewTD->getLocation(), diag::err_vla_decl_in_file_scope); | ||||||
6090 | else if (Oversized.getBoolValue()) | ||||||
6091 | Diag(NewTD->getLocation(), diag::err_array_too_large) | ||||||
6092 | << Oversized.toString(10); | ||||||
6093 | else | ||||||
6094 | Diag(NewTD->getLocation(), diag::err_vm_decl_in_file_scope); | ||||||
6095 | NewTD->setInvalidDecl(); | ||||||
6096 | } | ||||||
6097 | } | ||||||
6098 | } | ||||||
6099 | } | ||||||
6100 | |||||||
6101 | /// ActOnTypedefNameDecl - Perform semantic checking for a declaration which | ||||||
6102 | /// declares a typedef-name, either using the 'typedef' type specifier or via | ||||||
6103 | /// a C++0x [dcl.typedef]p2 alias-declaration: 'using T = A;'. | ||||||
6104 | NamedDecl* | ||||||
6105 | Sema::ActOnTypedefNameDecl(Scope *S, DeclContext *DC, TypedefNameDecl *NewTD, | ||||||
6106 | LookupResult &Previous, bool &Redeclaration) { | ||||||
6107 | |||||||
6108 | // Find the shadowed declaration before filtering for scope. | ||||||
6109 | NamedDecl *ShadowedDecl = getShadowedDeclaration(NewTD, Previous); | ||||||
6110 | |||||||
6111 | // Merge the decl with the existing one if appropriate. If the decl is | ||||||
6112 | // in an outer scope, it isn't the same thing. | ||||||
6113 | FilterLookupForScope(Previous, DC, S, /*ConsiderLinkage*/false, | ||||||
6114 | /*AllowInlineNamespace*/false); | ||||||
6115 | filterNonConflictingPreviousTypedefDecls(*this, NewTD, Previous); | ||||||
6116 | if (!Previous.empty()) { | ||||||
6117 | Redeclaration = true; | ||||||
6118 | MergeTypedefNameDecl(S, NewTD, Previous); | ||||||
6119 | } else { | ||||||
6120 | inferGslPointerAttribute(NewTD); | ||||||
6121 | } | ||||||
6122 | |||||||
6123 | if (ShadowedDecl && !Redeclaration) | ||||||
6124 | CheckShadow(NewTD, ShadowedDecl, Previous); | ||||||
6125 | |||||||
6126 | // If this is the C FILE type, notify the AST context. | ||||||
6127 | if (IdentifierInfo *II = NewTD->getIdentifier()) | ||||||
6128 | if (!NewTD->isInvalidDecl() && | ||||||
6129 | NewTD->getDeclContext()->getRedeclContext()->isTranslationUnit()) { | ||||||
6130 | if (II->isStr("FILE")) | ||||||
6131 | Context.setFILEDecl(NewTD); | ||||||
6132 | else if (II->isStr("jmp_buf")) | ||||||
6133 | Context.setjmp_bufDecl(NewTD); | ||||||
6134 | else if (II->isStr("sigjmp_buf")) | ||||||
6135 | Context.setsigjmp_bufDecl(NewTD); | ||||||
6136 | else if (II->isStr("ucontext_t")) | ||||||
6137 | Context.setucontext_tDecl(NewTD); | ||||||
6138 | } | ||||||
6139 | |||||||
6140 | return NewTD; | ||||||
6141 | } | ||||||
6142 | |||||||
6143 | /// Determines whether the given declaration is an out-of-scope | ||||||
6144 | /// previous declaration. | ||||||
6145 | /// | ||||||
6146 | /// This routine should be invoked when name lookup has found a | ||||||
6147 | /// previous declaration (PrevDecl) that is not in the scope where a | ||||||
6148 | /// new declaration by the same name is being introduced. If the new | ||||||
6149 | /// declaration occurs in a local scope, previous declarations with | ||||||
6150 | /// linkage may still be considered previous declarations (C99 | ||||||
6151 | /// 6.2.2p4-5, C++ [basic.link]p6). | ||||||
6152 | /// | ||||||
6153 | /// \param PrevDecl the previous declaration found by name | ||||||
6154 | /// lookup | ||||||
6155 | /// | ||||||
6156 | /// \param DC the context in which the new declaration is being | ||||||
6157 | /// declared. | ||||||
6158 | /// | ||||||
6159 | /// \returns true if PrevDecl is an out-of-scope previous declaration | ||||||
6160 | /// for a new delcaration with the same name. | ||||||
6161 | static bool | ||||||
6162 | isOutOfScopePreviousDeclaration(NamedDecl *PrevDecl, DeclContext *DC, | ||||||
6163 | ASTContext &Context) { | ||||||
6164 | if (!PrevDecl) | ||||||
6165 | return false; | ||||||
6166 | |||||||
6167 | if (!PrevDecl->hasLinkage()) | ||||||
6168 | return false; | ||||||
6169 | |||||||
6170 | if (Context.getLangOpts().CPlusPlus) { | ||||||
6171 | // C++ [basic.link]p6: | ||||||
6172 | // If there is a visible declaration of an entity with linkage | ||||||
6173 | // having the same name and type, ignoring entities declared | ||||||
6174 | // outside the innermost enclosing namespace scope, the block | ||||||
6175 | // scope declaration declares that same entity and receives the | ||||||
6176 | // linkage of the previous declaration. | ||||||
6177 | DeclContext *OuterContext = DC->getRedeclContext(); | ||||||
6178 | if (!OuterContext->isFunctionOrMethod()) | ||||||
6179 | // This rule only applies to block-scope declarations. | ||||||
6180 | return false; | ||||||
6181 | |||||||
6182 | DeclContext *PrevOuterContext = PrevDecl->getDeclContext(); | ||||||
6183 | if (PrevOuterContext->isRecord()) | ||||||
6184 | // We found a member function: ignore it. | ||||||
6185 | return false; | ||||||
6186 | |||||||
6187 | // Find the innermost enclosing namespace for the new and | ||||||
6188 | // previous declarations. | ||||||
6189 | OuterContext = OuterContext->getEnclosingNamespaceContext(); | ||||||
6190 | PrevOuterContext = PrevOuterContext->getEnclosingNamespaceContext(); | ||||||
6191 | |||||||
6192 | // The previous declaration is in a different namespace, so it | ||||||
6193 | // isn't the same function. | ||||||
6194 | if (!OuterContext->Equals(PrevOuterContext)) | ||||||
6195 | return false; | ||||||
6196 | } | ||||||
6197 | |||||||
6198 | return true; | ||||||
6199 | } | ||||||
6200 | |||||||
6201 | static void SetNestedNameSpecifier(Sema &S, DeclaratorDecl *DD, Declarator &D) { | ||||||
6202 | CXXScopeSpec &SS = D.getCXXScopeSpec(); | ||||||
6203 | if (!SS.isSet()) return; | ||||||
6204 | DD->setQualifierInfo(SS.getWithLocInContext(S.Context)); | ||||||
6205 | } | ||||||
6206 | |||||||
6207 | bool Sema::inferObjCARCLifetime(ValueDecl *decl) { | ||||||
6208 | QualType type = decl->getType(); | ||||||
6209 | Qualifiers::ObjCLifetime lifetime = type.getObjCLifetime(); | ||||||
6210 | if (lifetime == Qualifiers::OCL_Autoreleasing) { | ||||||
6211 | // Various kinds of declaration aren't allowed to be __autoreleasing. | ||||||
6212 | unsigned kind = -1U; | ||||||
6213 | if (VarDecl *var = dyn_cast<VarDecl>(decl)) { | ||||||
6214 | if (var->hasAttr<BlocksAttr>()) | ||||||
6215 | kind = 0; // __block | ||||||
6216 | else if (!var->hasLocalStorage()) | ||||||
6217 | kind = 1; // global | ||||||
6218 | } else if (isa<ObjCIvarDecl>(decl)) { | ||||||
6219 | kind = 3; // ivar | ||||||
6220 | } else if (isa<FieldDecl>(decl)) { | ||||||
6221 | kind = 2; // field | ||||||
6222 | } | ||||||
6223 | |||||||
6224 | if (kind != -1U) { | ||||||
6225 | Diag(decl->getLocation(), diag::err_arc_autoreleasing_var) | ||||||
6226 | << kind; | ||||||
6227 | } | ||||||
6228 | } else if (lifetime == Qualifiers::OCL_None) { | ||||||
6229 | // Try to infer lifetime. | ||||||
6230 | if (!type->isObjCLifetimeType()) | ||||||
6231 | return false; | ||||||
6232 | |||||||
6233 | lifetime = type->getObjCARCImplicitLifetime(); | ||||||
6234 | type = Context.getLifetimeQualifiedType(type, lifetime); | ||||||
6235 | decl->setType(type); | ||||||
6236 | } | ||||||
6237 | |||||||
6238 | if (VarDecl *var = dyn_cast<VarDecl>(decl)) { | ||||||
6239 | // Thread-local variables cannot have lifetime. | ||||||
6240 | if (lifetime && lifetime != Qualifiers::OCL_ExplicitNone && | ||||||
6241 | var->getTLSKind()) { | ||||||
6242 | Diag(var->getLocation(), diag::err_arc_thread_ownership) | ||||||
6243 | << var->getType(); | ||||||
6244 | return true; | ||||||
6245 | } | ||||||
6246 | } | ||||||
6247 | |||||||
6248 | return false; | ||||||
6249 | } | ||||||
6250 | |||||||
6251 | void Sema::deduceOpenCLAddressSpace(ValueDecl *Decl) { | ||||||
6252 | if (Decl->getType().hasAddressSpace()) | ||||||
6253 | return; | ||||||
6254 | if (VarDecl *Var = dyn_cast<VarDecl>(Decl)) { | ||||||
6255 | QualType Type = Var->getType(); | ||||||
6256 | if (Type->isSamplerT() || Type->isVoidType()) | ||||||
6257 | return; | ||||||
6258 | LangAS ImplAS = LangAS::opencl_private; | ||||||
6259 | if ((getLangOpts().OpenCLCPlusPlus || getLangOpts().OpenCLVersion >= 200) && | ||||||
6260 | Var->hasGlobalStorage()) | ||||||
6261 | ImplAS = LangAS::opencl_global; | ||||||
6262 | // If the original type from a decayed type is an array type and that array | ||||||
6263 | // type has no address space yet, deduce it now. | ||||||
6264 | if (auto DT = dyn_cast<DecayedType>(Type)) { | ||||||
6265 | auto OrigTy = DT->getOriginalType(); | ||||||
6266 | if (!OrigTy.hasAddressSpace() && OrigTy->isArrayType()) { | ||||||
6267 | // Add the address space to the original array type and then propagate | ||||||
6268 | // that to the element type through `getAsArrayType`. | ||||||
6269 | OrigTy = Context.getAddrSpaceQualType(OrigTy, ImplAS); | ||||||
6270 | OrigTy = QualType(Context.getAsArrayType(OrigTy), 0); | ||||||
6271 | // Re-generate the decayed type. | ||||||
6272 | Type = Context.getDecayedType(OrigTy); | ||||||
6273 | } | ||||||
6274 | } | ||||||
6275 | Type = Context.getAddrSpaceQualType(Type, ImplAS); | ||||||
6276 | // Apply any qualifiers (including address space) from the array type to | ||||||
6277 | // the element type. This implements C99 6.7.3p8: "If the specification of | ||||||
6278 | // an array type includes any type qualifiers, the element type is so | ||||||
6279 | // qualified, not the array type." | ||||||
6280 | if (Type->isArrayType()) | ||||||
6281 | Type = QualType(Context.getAsArrayType(Type), 0); | ||||||
6282 | Decl->setType(Type); | ||||||
6283 | } | ||||||
6284 | } | ||||||
6285 | |||||||
6286 | static void checkAttributesAfterMerging(Sema &S, NamedDecl &ND) { | ||||||
6287 | // Ensure that an auto decl is deduced otherwise the checks below might cache | ||||||
6288 | // the wrong linkage. | ||||||
6289 | assert(S.ParsingInitForAutoVars.count(&ND) == 0)((S.ParsingInitForAutoVars.count(&ND) == 0) ? static_cast <void> (0) : __assert_fail ("S.ParsingInitForAutoVars.count(&ND) == 0" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 6289, __PRETTY_FUNCTION__)); | ||||||
6290 | |||||||
6291 | // 'weak' only applies to declarations with external linkage. | ||||||
6292 | if (WeakAttr *Attr = ND.getAttr<WeakAttr>()) { | ||||||
6293 | if (!ND.isExternallyVisible()) { | ||||||
6294 | S.Diag(Attr->getLocation(), diag::err_attribute_weak_static); | ||||||
6295 | ND.dropAttr<WeakAttr>(); | ||||||
6296 | } | ||||||
6297 | } | ||||||
6298 | if (WeakRefAttr *Attr = ND.getAttr<WeakRefAttr>()) { | ||||||
6299 | if (ND.isExternallyVisible()) { | ||||||
6300 | S.Diag(Attr->getLocation(), diag::err_attribute_weakref_not_static); | ||||||
6301 | ND.dropAttr<WeakRefAttr>(); | ||||||
6302 | ND.dropAttr<AliasAttr>(); | ||||||
6303 | } | ||||||
6304 | } | ||||||
6305 | |||||||
6306 | if (auto *VD = dyn_cast<VarDecl>(&ND)) { | ||||||
6307 | if (VD->hasInit()) { | ||||||
6308 | if (const auto *Attr = VD->getAttr<AliasAttr>()) { | ||||||
6309 | assert(VD->isThisDeclarationADefinition() &&((VD->isThisDeclarationADefinition() && !VD->isExternallyVisible () && "Broken AliasAttr handled late!") ? static_cast <void> (0) : __assert_fail ("VD->isThisDeclarationADefinition() && !VD->isExternallyVisible() && \"Broken AliasAttr handled late!\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 6310, __PRETTY_FUNCTION__)) | ||||||
6310 | !VD->isExternallyVisible() && "Broken AliasAttr handled late!")((VD->isThisDeclarationADefinition() && !VD->isExternallyVisible () && "Broken AliasAttr handled late!") ? static_cast <void> (0) : __assert_fail ("VD->isThisDeclarationADefinition() && !VD->isExternallyVisible() && \"Broken AliasAttr handled late!\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 6310, __PRETTY_FUNCTION__)); | ||||||
6311 | S.Diag(Attr->getLocation(), diag::err_alias_is_definition) << VD << 0; | ||||||
6312 | VD->dropAttr<AliasAttr>(); | ||||||
6313 | } | ||||||
6314 | } | ||||||
6315 | } | ||||||
6316 | |||||||
6317 | // 'selectany' only applies to externally visible variable declarations. | ||||||
6318 | // It does not apply to functions. | ||||||
6319 | if (SelectAnyAttr *Attr = ND.getAttr<SelectAnyAttr>()) { | ||||||
6320 | if (isa<FunctionDecl>(ND) || !ND.isExternallyVisible()) { | ||||||
6321 | S.Diag(Attr->getLocation(), | ||||||
6322 | diag::err_attribute_selectany_non_extern_data); | ||||||
6323 | ND.dropAttr<SelectAnyAttr>(); | ||||||
6324 | } | ||||||
6325 | } | ||||||
6326 | |||||||
6327 | if (const InheritableAttr *Attr = getDLLAttr(&ND)) { | ||||||
6328 | auto *VD = dyn_cast<VarDecl>(&ND); | ||||||
6329 | bool IsAnonymousNS = false; | ||||||
6330 | bool IsMicrosoft = S.Context.getTargetInfo().getCXXABI().isMicrosoft(); | ||||||
6331 | if (VD) { | ||||||
6332 | const NamespaceDecl *NS = dyn_cast<NamespaceDecl>(VD->getDeclContext()); | ||||||
6333 | while (NS && !IsAnonymousNS) { | ||||||
6334 | IsAnonymousNS = NS->isAnonymousNamespace(); | ||||||
6335 | NS = dyn_cast<NamespaceDecl>(NS->getParent()); | ||||||
6336 | } | ||||||
6337 | } | ||||||
6338 | // dll attributes require external linkage. Static locals may have external | ||||||
6339 | // linkage but still cannot be explicitly imported or exported. | ||||||
6340 | // In Microsoft mode, a variable defined in anonymous namespace must have | ||||||
6341 | // external linkage in order to be exported. | ||||||
6342 | bool AnonNSInMicrosoftMode = IsAnonymousNS && IsMicrosoft; | ||||||
6343 | if ((ND.isExternallyVisible() && AnonNSInMicrosoftMode) || | ||||||
6344 | (!AnonNSInMicrosoftMode && | ||||||
6345 | (!ND.isExternallyVisible() || (VD && VD->isStaticLocal())))) { | ||||||
6346 | S.Diag(ND.getLocation(), diag::err_attribute_dll_not_extern) | ||||||
6347 | << &ND << Attr; | ||||||
6348 | ND.setInvalidDecl(); | ||||||
6349 | } | ||||||
6350 | } | ||||||
6351 | |||||||
6352 | // Virtual functions cannot be marked as 'notail'. | ||||||
6353 | if (auto *Attr = ND.getAttr<NotTailCalledAttr>()) | ||||||
6354 | if (auto *MD = dyn_cast<CXXMethodDecl>(&ND)) | ||||||
6355 | if (MD->isVirtual()) { | ||||||
6356 | S.Diag(ND.getLocation(), | ||||||
6357 | diag::err_invalid_attribute_on_virtual_function) | ||||||
6358 | << Attr; | ||||||
6359 | ND.dropAttr<NotTailCalledAttr>(); | ||||||
6360 | } | ||||||
6361 | |||||||
6362 | // Check the attributes on the function type, if any. | ||||||
6363 | if (const auto *FD = dyn_cast<FunctionDecl>(&ND)) { | ||||||
6364 | // Don't declare this variable in the second operand of the for-statement; | ||||||
6365 | // GCC miscompiles that by ending its lifetime before evaluating the | ||||||
6366 | // third operand. See gcc.gnu.org/PR86769. | ||||||
6367 | AttributedTypeLoc ATL; | ||||||
6368 | for (TypeLoc TL = FD->getTypeSourceInfo()->getTypeLoc(); | ||||||
6369 | (ATL = TL.getAsAdjusted<AttributedTypeLoc>()); | ||||||
6370 | TL = ATL.getModifiedLoc()) { | ||||||
6371 | // The [[lifetimebound]] attribute can be applied to the implicit object | ||||||
6372 | // parameter of a non-static member function (other than a ctor or dtor) | ||||||
6373 | // by applying it to the function type. | ||||||
6374 | if (const auto *A = ATL.getAttrAs<LifetimeBoundAttr>()) { | ||||||
6375 | const auto *MD = dyn_cast<CXXMethodDecl>(FD); | ||||||
6376 | if (!MD || MD->isStatic()) { | ||||||
6377 | S.Diag(A->getLocation(), diag::err_lifetimebound_no_object_param) | ||||||
6378 | << !MD << A->getRange(); | ||||||
6379 | } else if (isa<CXXConstructorDecl>(MD) || isa<CXXDestructorDecl>(MD)) { | ||||||
6380 | S.Diag(A->getLocation(), diag::err_lifetimebound_ctor_dtor) | ||||||
6381 | << isa<CXXDestructorDecl>(MD) << A->getRange(); | ||||||
6382 | } | ||||||
6383 | } | ||||||
6384 | } | ||||||
6385 | } | ||||||
6386 | } | ||||||
6387 | |||||||
6388 | static void checkDLLAttributeRedeclaration(Sema &S, NamedDecl *OldDecl, | ||||||
6389 | NamedDecl *NewDecl, | ||||||
6390 | bool IsSpecialization, | ||||||
6391 | bool IsDefinition) { | ||||||
6392 | if (OldDecl->isInvalidDecl() || NewDecl->isInvalidDecl()) | ||||||
6393 | return; | ||||||
6394 | |||||||
6395 | bool IsTemplate = false; | ||||||
6396 | if (TemplateDecl *OldTD = dyn_cast<TemplateDecl>(OldDecl)) { | ||||||
6397 | OldDecl = OldTD->getTemplatedDecl(); | ||||||
6398 | IsTemplate = true; | ||||||
6399 | if (!IsSpecialization) | ||||||
6400 | IsDefinition = false; | ||||||
6401 | } | ||||||
6402 | if (TemplateDecl *NewTD = dyn_cast<TemplateDecl>(NewDecl)) { | ||||||
6403 | NewDecl = NewTD->getTemplatedDecl(); | ||||||
6404 | IsTemplate = true; | ||||||
6405 | } | ||||||
6406 | |||||||
6407 | if (!OldDecl || !NewDecl) | ||||||
6408 | return; | ||||||
6409 | |||||||
6410 | const DLLImportAttr *OldImportAttr = OldDecl->getAttr<DLLImportAttr>(); | ||||||
6411 | const DLLExportAttr *OldExportAttr = OldDecl->getAttr<DLLExportAttr>(); | ||||||
6412 | const DLLImportAttr *NewImportAttr = NewDecl->getAttr<DLLImportAttr>(); | ||||||
6413 | const DLLExportAttr *NewExportAttr = NewDecl->getAttr<DLLExportAttr>(); | ||||||
6414 | |||||||
6415 | // dllimport and dllexport are inheritable attributes so we have to exclude | ||||||
6416 | // inherited attribute instances. | ||||||
6417 | bool HasNewAttr = (NewImportAttr && !NewImportAttr->isInherited()) || | ||||||
6418 | (NewExportAttr && !NewExportAttr->isInherited()); | ||||||
6419 | |||||||
6420 | // A redeclaration is not allowed to add a dllimport or dllexport attribute, | ||||||
6421 | // the only exception being explicit specializations. | ||||||
6422 | // Implicitly generated declarations are also excluded for now because there | ||||||
6423 | // is no other way to switch these to use dllimport or dllexport. | ||||||
6424 | bool AddsAttr = !(OldImportAttr || OldExportAttr) && HasNewAttr; | ||||||
6425 | |||||||
6426 | if (AddsAttr && !IsSpecialization && !OldDecl->isImplicit()) { | ||||||
6427 | // Allow with a warning for free functions and global variables. | ||||||
6428 | bool JustWarn = false; | ||||||
6429 | if (!OldDecl->isCXXClassMember()) { | ||||||
6430 | auto *VD = dyn_cast<VarDecl>(OldDecl); | ||||||
6431 | if (VD && !VD->getDescribedVarTemplate()) | ||||||
6432 | JustWarn = true; | ||||||
6433 | auto *FD = dyn_cast<FunctionDecl>(OldDecl); | ||||||
6434 | if (FD && FD->getTemplatedKind() == FunctionDecl::TK_NonTemplate) | ||||||
6435 | JustWarn = true; | ||||||
6436 | } | ||||||
6437 | |||||||
6438 | // We cannot change a declaration that's been used because IR has already | ||||||
6439 | // been emitted. Dllimported functions will still work though (modulo | ||||||
6440 | // address equality) as they can use the thunk. | ||||||
6441 | if (OldDecl->isUsed()) | ||||||
6442 | if (!isa<FunctionDecl>(OldDecl) || !NewImportAttr) | ||||||
6443 | JustWarn = false; | ||||||
6444 | |||||||
6445 | unsigned DiagID = JustWarn ? diag::warn_attribute_dll_redeclaration | ||||||
6446 | : diag::err_attribute_dll_redeclaration; | ||||||
6447 | S.Diag(NewDecl->getLocation(), DiagID) | ||||||
6448 | << NewDecl | ||||||
6449 | << (NewImportAttr ? (const Attr *)NewImportAttr : NewExportAttr); | ||||||
6450 | S.Diag(OldDecl->getLocation(), diag::note_previous_declaration); | ||||||
6451 | if (!JustWarn) { | ||||||
6452 | NewDecl->setInvalidDecl(); | ||||||
6453 | return; | ||||||
6454 | } | ||||||
6455 | } | ||||||
6456 | |||||||
6457 | // A redeclaration is not allowed to drop a dllimport attribute, the only | ||||||
6458 | // exceptions being inline function definitions (except for function | ||||||
6459 | // templates), local extern declarations, qualified friend declarations or | ||||||
6460 | // special MSVC extension: in the last case, the declaration is treated as if | ||||||
6461 | // it were marked dllexport. | ||||||
6462 | bool IsInline = false, IsStaticDataMember = false, IsQualifiedFriend = false; | ||||||
6463 | bool IsMicrosoft = S.Context.getTargetInfo().getCXXABI().isMicrosoft(); | ||||||
6464 | if (const auto *VD = dyn_cast<VarDecl>(NewDecl)) { | ||||||
6465 | // Ignore static data because out-of-line definitions are diagnosed | ||||||
6466 | // separately. | ||||||
6467 | IsStaticDataMember = VD->isStaticDataMember(); | ||||||
6468 | IsDefinition = VD->isThisDeclarationADefinition(S.Context) != | ||||||
6469 | VarDecl::DeclarationOnly; | ||||||
6470 | } else if (const auto *FD = dyn_cast<FunctionDecl>(NewDecl)) { | ||||||
6471 | IsInline = FD->isInlined(); | ||||||
6472 | IsQualifiedFriend = FD->getQualifier() && | ||||||
6473 | FD->getFriendObjectKind() == Decl::FOK_Declared; | ||||||
6474 | } | ||||||
6475 | |||||||
6476 | if (OldImportAttr && !HasNewAttr && | ||||||
6477 | (!IsInline || (IsMicrosoft && IsTemplate)) && !IsStaticDataMember && | ||||||
6478 | !NewDecl->isLocalExternDecl() && !IsQualifiedFriend) { | ||||||
6479 | if (IsMicrosoft && IsDefinition) { | ||||||
6480 | S.Diag(NewDecl->getLocation(), | ||||||
6481 | diag::warn_redeclaration_without_import_attribute) | ||||||
6482 | << NewDecl; | ||||||
6483 | S.Diag(OldDecl->getLocation(), diag::note_previous_declaration); | ||||||
6484 | NewDecl->dropAttr<DLLImportAttr>(); | ||||||
6485 | NewDecl->addAttr( | ||||||
6486 | DLLExportAttr::CreateImplicit(S.Context, NewImportAttr->getRange())); | ||||||
6487 | } else { | ||||||
6488 | S.Diag(NewDecl->getLocation(), | ||||||
6489 | diag::warn_redeclaration_without_attribute_prev_attribute_ignored) | ||||||
6490 | << NewDecl << OldImportAttr; | ||||||
6491 | S.Diag(OldDecl->getLocation(), diag::note_previous_declaration); | ||||||
6492 | S.Diag(OldImportAttr->getLocation(), diag::note_previous_attribute); | ||||||
6493 | OldDecl->dropAttr<DLLImportAttr>(); | ||||||
6494 | NewDecl->dropAttr<DLLImportAttr>(); | ||||||
6495 | } | ||||||
6496 | } else if (IsInline && OldImportAttr && !IsMicrosoft) { | ||||||
6497 | // In MinGW, seeing a function declared inline drops the dllimport | ||||||
6498 | // attribute. | ||||||
6499 | OldDecl->dropAttr<DLLImportAttr>(); | ||||||
6500 | NewDecl->dropAttr<DLLImportAttr>(); | ||||||
6501 | S.Diag(NewDecl->getLocation(), | ||||||
6502 | diag::warn_dllimport_dropped_from_inline_function) | ||||||
6503 | << NewDecl << OldImportAttr; | ||||||
6504 | } | ||||||
6505 | |||||||
6506 | // A specialization of a class template member function is processed here | ||||||
6507 | // since it's a redeclaration. If the parent class is dllexport, the | ||||||
6508 | // specialization inherits that attribute. This doesn't happen automatically | ||||||
6509 | // since the parent class isn't instantiated until later. | ||||||
6510 | if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(NewDecl)) { | ||||||
6511 | if (MD->getTemplatedKind() == FunctionDecl::TK_MemberSpecialization && | ||||||
6512 | !NewImportAttr && !NewExportAttr) { | ||||||
6513 | if (const DLLExportAttr *ParentExportAttr = | ||||||
6514 | MD->getParent()->getAttr<DLLExportAttr>()) { | ||||||
6515 | DLLExportAttr *NewAttr = ParentExportAttr->clone(S.Context); | ||||||
6516 | NewAttr->setInherited(true); | ||||||
6517 | NewDecl->addAttr(NewAttr); | ||||||
6518 | } | ||||||
6519 | } | ||||||
6520 | } | ||||||
6521 | } | ||||||
6522 | |||||||
6523 | /// Given that we are within the definition of the given function, | ||||||
6524 | /// will that definition behave like C99's 'inline', where the | ||||||
6525 | /// definition is discarded except for optimization purposes? | ||||||
6526 | static bool isFunctionDefinitionDiscarded(Sema &S, FunctionDecl *FD) { | ||||||
6527 | // Try to avoid calling GetGVALinkageForFunction. | ||||||
6528 | |||||||
6529 | // All cases of this require the 'inline' keyword. | ||||||
6530 | if (!FD->isInlined()) return false; | ||||||
6531 | |||||||
6532 | // This is only possible in C++ with the gnu_inline attribute. | ||||||
6533 | if (S.getLangOpts().CPlusPlus && !FD->hasAttr<GNUInlineAttr>()) | ||||||
6534 | return false; | ||||||
6535 | |||||||
6536 | // Okay, go ahead and call the relatively-more-expensive function. | ||||||
6537 | return S.Context.GetGVALinkageForFunction(FD) == GVA_AvailableExternally; | ||||||
6538 | } | ||||||
6539 | |||||||
6540 | /// Determine whether a variable is extern "C" prior to attaching | ||||||
6541 | /// an initializer. We can't just call isExternC() here, because that | ||||||
6542 | /// will also compute and cache whether the declaration is externally | ||||||
6543 | /// visible, which might change when we attach the initializer. | ||||||
6544 | /// | ||||||
6545 | /// This can only be used if the declaration is known to not be a | ||||||
6546 | /// redeclaration of an internal linkage declaration. | ||||||
6547 | /// | ||||||
6548 | /// For instance: | ||||||
6549 | /// | ||||||
6550 | /// auto x = []{}; | ||||||
6551 | /// | ||||||
6552 | /// Attaching the initializer here makes this declaration not externally | ||||||
6553 | /// visible, because its type has internal linkage. | ||||||
6554 | /// | ||||||
6555 | /// FIXME: This is a hack. | ||||||
6556 | template<typename T> | ||||||
6557 | static bool isIncompleteDeclExternC(Sema &S, const T *D) { | ||||||
6558 | if (S.getLangOpts().CPlusPlus) { | ||||||
6559 | // In C++, the overloadable attribute negates the effects of extern "C". | ||||||
6560 | if (!D->isInExternCContext() || D->template hasAttr<OverloadableAttr>()) | ||||||
6561 | return false; | ||||||
6562 | |||||||
6563 | // So do CUDA's host/device attributes. | ||||||
6564 | if (S.getLangOpts().CUDA && (D->template hasAttr<CUDADeviceAttr>() || | ||||||
6565 | D->template hasAttr<CUDAHostAttr>())) | ||||||
6566 | return false; | ||||||
6567 | } | ||||||
6568 | return D->isExternC(); | ||||||
6569 | } | ||||||
6570 | |||||||
6571 | static bool shouldConsiderLinkage(const VarDecl *VD) { | ||||||
6572 | const DeclContext *DC = VD->getDeclContext()->getRedeclContext(); | ||||||
6573 | if (DC->isFunctionOrMethod() || isa<OMPDeclareReductionDecl>(DC) || | ||||||
6574 | isa<OMPDeclareMapperDecl>(DC)) | ||||||
6575 | return VD->hasExternalStorage(); | ||||||
6576 | if (DC->isFileContext()) | ||||||
6577 | return true; | ||||||
6578 | if (DC->isRecord()) | ||||||
6579 | return false; | ||||||
6580 | if (isa<RequiresExprBodyDecl>(DC)) | ||||||
6581 | return false; | ||||||
6582 | llvm_unreachable("Unexpected context")::llvm::llvm_unreachable_internal("Unexpected context", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 6582); | ||||||
6583 | } | ||||||
6584 | |||||||
6585 | static bool shouldConsiderLinkage(const FunctionDecl *FD) { | ||||||
6586 | const DeclContext *DC = FD->getDeclContext()->getRedeclContext(); | ||||||
6587 | if (DC->isFileContext() || DC->isFunctionOrMethod() || | ||||||
6588 | isa<OMPDeclareReductionDecl>(DC) || isa<OMPDeclareMapperDecl>(DC)) | ||||||
6589 | return true; | ||||||
6590 | if (DC->isRecord()) | ||||||
6591 | return false; | ||||||
6592 | llvm_unreachable("Unexpected context")::llvm::llvm_unreachable_internal("Unexpected context", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 6592); | ||||||
6593 | } | ||||||
6594 | |||||||
6595 | static bool hasParsedAttr(Scope *S, const Declarator &PD, | ||||||
6596 | ParsedAttr::Kind Kind) { | ||||||
6597 | // Check decl attributes on the DeclSpec. | ||||||
6598 | if (PD.getDeclSpec().getAttributes().hasAttribute(Kind)) | ||||||
6599 | return true; | ||||||
6600 | |||||||
6601 | // Walk the declarator structure, checking decl attributes that were in a type | ||||||
6602 | // position to the decl itself. | ||||||
6603 | for (unsigned I = 0, E = PD.getNumTypeObjects(); I != E; ++I) { | ||||||
6604 | if (PD.getTypeObject(I).getAttrs().hasAttribute(Kind)) | ||||||
6605 | return true; | ||||||
6606 | } | ||||||
6607 | |||||||
6608 | // Finally, check attributes on the decl itself. | ||||||
6609 | return PD.getAttributes().hasAttribute(Kind); | ||||||
6610 | } | ||||||
6611 | |||||||
6612 | /// Adjust the \c DeclContext for a function or variable that might be a | ||||||
6613 | /// function-local external declaration. | ||||||
6614 | bool Sema::adjustContextForLocalExternDecl(DeclContext *&DC) { | ||||||
6615 | if (!DC->isFunctionOrMethod()) | ||||||
6616 | return false; | ||||||
6617 | |||||||
6618 | // If this is a local extern function or variable declared within a function | ||||||
6619 | // template, don't add it into the enclosing namespace scope until it is | ||||||
6620 | // instantiated; it might have a dependent type right now. | ||||||
6621 | if (DC->isDependentContext()) | ||||||
6622 | return true; | ||||||
6623 | |||||||
6624 | // C++11 [basic.link]p7: | ||||||
6625 | // When a block scope declaration of an entity with linkage is not found to | ||||||
6626 | // refer to some other declaration, then that entity is a member of the | ||||||
6627 | // innermost enclosing namespace. | ||||||
6628 | // | ||||||
6629 | // Per C++11 [namespace.def]p6, the innermost enclosing namespace is a | ||||||
6630 | // semantically-enclosing namespace, not a lexically-enclosing one. | ||||||
6631 | while (!DC->isFileContext() && !isa<LinkageSpecDecl>(DC)) | ||||||
6632 | DC = DC->getParent(); | ||||||
6633 | return true; | ||||||
6634 | } | ||||||
6635 | |||||||
6636 | /// Returns true if given declaration has external C language linkage. | ||||||
6637 | static bool isDeclExternC(const Decl *D) { | ||||||
6638 | if (const auto *FD = dyn_cast<FunctionDecl>(D)) | ||||||
6639 | return FD->isExternC(); | ||||||
6640 | if (const auto *VD = dyn_cast<VarDecl>(D)) | ||||||
6641 | return VD->isExternC(); | ||||||
6642 | |||||||
6643 | llvm_unreachable("Unknown type of decl!")::llvm::llvm_unreachable_internal("Unknown type of decl!", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 6643); | ||||||
6644 | } | ||||||
6645 | /// Returns true if there hasn't been any invalid type diagnosed. | ||||||
6646 | static bool diagnoseOpenCLTypes(Scope *S, Sema &Se, Declarator &D, | ||||||
6647 | DeclContext *DC, QualType R) { | ||||||
6648 | // OpenCL v2.0 s6.9.b - Image type can only be used as a function argument. | ||||||
6649 | // OpenCL v2.0 s6.13.16.1 - Pipe type can only be used as a function | ||||||
6650 | // argument. | ||||||
6651 | if (R->isImageType() || R->isPipeType()) { | ||||||
6652 | Se.Diag(D.getIdentifierLoc(), | ||||||
6653 | diag::err_opencl_type_can_only_be_used_as_function_parameter) | ||||||
6654 | << R; | ||||||
6655 | D.setInvalidType(); | ||||||
6656 | return false; | ||||||
6657 | } | ||||||
6658 | |||||||
6659 | // OpenCL v1.2 s6.9.r: | ||||||
6660 | // The event type cannot be used to declare a program scope variable. | ||||||
6661 | // OpenCL v2.0 s6.9.q: | ||||||
6662 | // The clk_event_t and reserve_id_t types cannot be declared in program | ||||||
6663 | // scope. | ||||||
6664 | if (NULL__null == S->getParent()) { | ||||||
6665 | if (R->isReserveIDT() || R->isClkEventT() || R->isEventT()) { | ||||||
6666 | Se.Diag(D.getIdentifierLoc(), | ||||||
6667 | diag::err_invalid_type_for_program_scope_var) | ||||||
6668 | << R; | ||||||
6669 | D.setInvalidType(); | ||||||
6670 | return false; | ||||||
6671 | } | ||||||
6672 | } | ||||||
6673 | |||||||
6674 | // OpenCL v1.0 s6.8.a.3: Pointers to functions are not allowed. | ||||||
6675 | QualType NR = R; | ||||||
6676 | while (NR->isPointerType()) { | ||||||
6677 | if (NR->isFunctionPointerType()) { | ||||||
6678 | Se.Diag(D.getIdentifierLoc(), diag::err_opencl_function_pointer); | ||||||
6679 | D.setInvalidType(); | ||||||
6680 | return false; | ||||||
6681 | } | ||||||
6682 | NR = NR->getPointeeType(); | ||||||
6683 | } | ||||||
6684 | |||||||
6685 | if (!Se.getOpenCLOptions().isEnabled("cl_khr_fp16")) { | ||||||
6686 | // OpenCL v1.2 s6.1.1.1: reject declaring variables of the half and | ||||||
6687 | // half array type (unless the cl_khr_fp16 extension is enabled). | ||||||
6688 | if (Se.Context.getBaseElementType(R)->isHalfType()) { | ||||||
6689 | Se.Diag(D.getIdentifierLoc(), diag::err_opencl_half_declaration) << R; | ||||||
6690 | D.setInvalidType(); | ||||||
6691 | return false; | ||||||
6692 | } | ||||||
6693 | } | ||||||
6694 | |||||||
6695 | // OpenCL v1.2 s6.9.r: | ||||||
6696 | // The event type cannot be used with the __local, __constant and __global | ||||||
6697 | // address space qualifiers. | ||||||
6698 | if (R->isEventT()) { | ||||||
6699 | if (R.getAddressSpace() != LangAS::opencl_private) { | ||||||
6700 | Se.Diag(D.getBeginLoc(), diag::err_event_t_addr_space_qual); | ||||||
6701 | D.setInvalidType(); | ||||||
6702 | return false; | ||||||
6703 | } | ||||||
6704 | } | ||||||
6705 | |||||||
6706 | // C++ for OpenCL does not allow the thread_local storage qualifier. | ||||||
6707 | // OpenCL C does not support thread_local either, and | ||||||
6708 | // also reject all other thread storage class specifiers. | ||||||
6709 | DeclSpec::TSCS TSC = D.getDeclSpec().getThreadStorageClassSpec(); | ||||||
6710 | if (TSC != TSCS_unspecified) { | ||||||
6711 | bool IsCXX = Se.getLangOpts().OpenCLCPlusPlus; | ||||||
6712 | Se.Diag(D.getDeclSpec().getThreadStorageClassSpecLoc(), | ||||||
6713 | diag::err_opencl_unknown_type_specifier) | ||||||
6714 | << IsCXX << Se.getLangOpts().getOpenCLVersionTuple().getAsString() | ||||||
6715 | << DeclSpec::getSpecifierName(TSC) << 1; | ||||||
6716 | D.setInvalidType(); | ||||||
6717 | return false; | ||||||
6718 | } | ||||||
6719 | |||||||
6720 | if (R->isSamplerT()) { | ||||||
6721 | // OpenCL v1.2 s6.9.b p4: | ||||||
6722 | // The sampler type cannot be used with the __local and __global address | ||||||
6723 | // space qualifiers. | ||||||
6724 | if (R.getAddressSpace() == LangAS::opencl_local || | ||||||
6725 | R.getAddressSpace() == LangAS::opencl_global) { | ||||||
6726 | Se.Diag(D.getIdentifierLoc(), diag::err_wrong_sampler_addressspace); | ||||||
6727 | D.setInvalidType(); | ||||||
6728 | } | ||||||
6729 | |||||||
6730 | // OpenCL v1.2 s6.12.14.1: | ||||||
6731 | // A global sampler must be declared with either the constant address | ||||||
6732 | // space qualifier or with the const qualifier. | ||||||
6733 | if (DC->isTranslationUnit() && | ||||||
6734 | !(R.getAddressSpace() == LangAS::opencl_constant || | ||||||
6735 | R.isConstQualified())) { | ||||||
6736 | Se.Diag(D.getIdentifierLoc(), diag::err_opencl_nonconst_global_sampler); | ||||||
6737 | D.setInvalidType(); | ||||||
6738 | } | ||||||
6739 | if (D.isInvalidType()) | ||||||
6740 | return false; | ||||||
6741 | } | ||||||
6742 | return true; | ||||||
6743 | } | ||||||
6744 | |||||||
6745 | NamedDecl *Sema::ActOnVariableDeclarator( | ||||||
6746 | Scope *S, Declarator &D, DeclContext *DC, TypeSourceInfo *TInfo, | ||||||
6747 | LookupResult &Previous, MultiTemplateParamsArg TemplateParamLists, | ||||||
6748 | bool &AddToScope, ArrayRef<BindingDecl *> Bindings) { | ||||||
6749 | QualType R = TInfo->getType(); | ||||||
6750 | DeclarationName Name = GetNameForDeclarator(D).getName(); | ||||||
6751 | |||||||
6752 | IdentifierInfo *II = Name.getAsIdentifierInfo(); | ||||||
6753 | |||||||
6754 | if (D.isDecompositionDeclarator()) { | ||||||
6755 | // Take the name of the first declarator as our name for diagnostic | ||||||
6756 | // purposes. | ||||||
6757 | auto &Decomp = D.getDecompositionDeclarator(); | ||||||
6758 | if (!Decomp.bindings().empty()) { | ||||||
6759 | II = Decomp.bindings()[0].Name; | ||||||
6760 | Name = II; | ||||||
6761 | } | ||||||
6762 | } else if (!II) { | ||||||
6763 | Diag(D.getIdentifierLoc(), diag::err_bad_variable_name) << Name; | ||||||
6764 | return nullptr; | ||||||
6765 | } | ||||||
6766 | |||||||
6767 | |||||||
6768 | DeclSpec::SCS SCSpec = D.getDeclSpec().getStorageClassSpec(); | ||||||
6769 | StorageClass SC = StorageClassSpecToVarDeclStorageClass(D.getDeclSpec()); | ||||||
6770 | |||||||
6771 | // dllimport globals without explicit storage class are treated as extern. We | ||||||
6772 | // have to change the storage class this early to get the right DeclContext. | ||||||
6773 | if (SC == SC_None && !DC->isRecord() && | ||||||
6774 | hasParsedAttr(S, D, ParsedAttr::AT_DLLImport) && | ||||||
6775 | !hasParsedAttr(S, D, ParsedAttr::AT_DLLExport)) | ||||||
6776 | SC = SC_Extern; | ||||||
6777 | |||||||
6778 | DeclContext *OriginalDC = DC; | ||||||
6779 | bool IsLocalExternDecl = SC == SC_Extern && | ||||||
6780 | adjustContextForLocalExternDecl(DC); | ||||||
6781 | |||||||
6782 | if (SCSpec == DeclSpec::SCS_mutable) { | ||||||
6783 | // mutable can only appear on non-static class members, so it's always | ||||||
6784 | // an error here | ||||||
6785 | Diag(D.getIdentifierLoc(), diag::err_mutable_nonmember); | ||||||
6786 | D.setInvalidType(); | ||||||
6787 | SC = SC_None; | ||||||
6788 | } | ||||||
6789 | |||||||
6790 | if (getLangOpts().CPlusPlus11 && SCSpec == DeclSpec::SCS_register && | ||||||
6791 | !D.getAsmLabel() && !getSourceManager().isInSystemMacro( | ||||||
6792 | D.getDeclSpec().getStorageClassSpecLoc())) { | ||||||
6793 | // In C++11, the 'register' storage class specifier is deprecated. | ||||||
6794 | // Suppress the warning in system macros, it's used in macros in some | ||||||
6795 | // popular C system headers, such as in glibc's htonl() macro. | ||||||
6796 | Diag(D.getDeclSpec().getStorageClassSpecLoc(), | ||||||
6797 | getLangOpts().CPlusPlus17 ? diag::ext_register_storage_class | ||||||
6798 | : diag::warn_deprecated_register) | ||||||
6799 | << FixItHint::CreateRemoval(D.getDeclSpec().getStorageClassSpecLoc()); | ||||||
6800 | } | ||||||
6801 | |||||||
6802 | DiagnoseFunctionSpecifiers(D.getDeclSpec()); | ||||||
6803 | |||||||
6804 | if (!DC->isRecord() && S->getFnParent() == nullptr) { | ||||||
6805 | // C99 6.9p2: The storage-class specifiers auto and register shall not | ||||||
6806 | // appear in the declaration specifiers in an external declaration. | ||||||
6807 | // Global Register+Asm is a GNU extension we support. | ||||||
6808 | if (SC == SC_Auto || (SC == SC_Register && !D.getAsmLabel())) { | ||||||
6809 | Diag(D.getIdentifierLoc(), diag::err_typecheck_sclass_fscope); | ||||||
6810 | D.setInvalidType(); | ||||||
6811 | } | ||||||
6812 | } | ||||||
6813 | |||||||
6814 | bool IsMemberSpecialization = false; | ||||||
6815 | bool IsVariableTemplateSpecialization = false; | ||||||
6816 | bool IsPartialSpecialization = false; | ||||||
6817 | bool IsVariableTemplate = false; | ||||||
6818 | VarDecl *NewVD = nullptr; | ||||||
6819 | VarTemplateDecl *NewTemplate = nullptr; | ||||||
6820 | TemplateParameterList *TemplateParams = nullptr; | ||||||
6821 | if (!getLangOpts().CPlusPlus) { | ||||||
6822 | NewVD = VarDecl::Create(Context, DC, D.getBeginLoc(), D.getIdentifierLoc(), | ||||||
6823 | II, R, TInfo, SC); | ||||||
6824 | |||||||
6825 | if (R->getContainedDeducedType()) | ||||||
6826 | ParsingInitForAutoVars.insert(NewVD); | ||||||
6827 | |||||||
6828 | if (D.isInvalidType()) | ||||||
6829 | NewVD->setInvalidDecl(); | ||||||
6830 | |||||||
6831 | if (NewVD->getType().hasNonTrivialToPrimitiveDestructCUnion() && | ||||||
6832 | NewVD->hasLocalStorage()) | ||||||
6833 | checkNonTrivialCUnion(NewVD->getType(), NewVD->getLocation(), | ||||||
6834 | NTCUC_AutoVar, NTCUK_Destruct); | ||||||
6835 | } else { | ||||||
6836 | bool Invalid = false; | ||||||
6837 | |||||||
6838 | if (DC->isRecord() && !CurContext->isRecord()) { | ||||||
6839 | // This is an out-of-line definition of a static data member. | ||||||
6840 | switch (SC) { | ||||||
6841 | case SC_None: | ||||||
6842 | break; | ||||||
6843 | case SC_Static: | ||||||
6844 | Diag(D.getDeclSpec().getStorageClassSpecLoc(), | ||||||
6845 | diag::err_static_out_of_line) | ||||||
6846 | << FixItHint::CreateRemoval(D.getDeclSpec().getStorageClassSpecLoc()); | ||||||
6847 | break; | ||||||
6848 | case SC_Auto: | ||||||
6849 | case SC_Register: | ||||||
6850 | case SC_Extern: | ||||||
6851 | // [dcl.stc] p2: The auto or register specifiers shall be applied only | ||||||
6852 | // to names of variables declared in a block or to function parameters. | ||||||
6853 | // [dcl.stc] p6: The extern specifier cannot be used in the declaration | ||||||
6854 | // of class members | ||||||
6855 | |||||||
6856 | Diag(D.getDeclSpec().getStorageClassSpecLoc(), | ||||||
6857 | diag::err_storage_class_for_static_member) | ||||||
6858 | << FixItHint::CreateRemoval(D.getDeclSpec().getStorageClassSpecLoc()); | ||||||
6859 | break; | ||||||
6860 | case SC_PrivateExtern: | ||||||
6861 | llvm_unreachable("C storage class in c++!")::llvm::llvm_unreachable_internal("C storage class in c++!", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 6861); | ||||||
6862 | } | ||||||
6863 | } | ||||||
6864 | |||||||
6865 | if (SC == SC_Static && CurContext->isRecord()) { | ||||||
6866 | if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(DC)) { | ||||||
6867 | // C++ [class.static.data]p2: | ||||||
6868 | // A static data member shall not be a direct member of an unnamed | ||||||
6869 | // or local class | ||||||
6870 | // FIXME: or of a (possibly indirectly) nested class thereof. | ||||||
6871 | if (RD->isLocalClass()) { | ||||||
6872 | Diag(D.getIdentifierLoc(), | ||||||
6873 | diag::err_static_data_member_not_allowed_in_local_class) | ||||||
6874 | << Name << RD->getDeclName() << RD->getTagKind(); | ||||||
6875 | } else if (!RD->getDeclName()) { | ||||||
6876 | Diag(D.getIdentifierLoc(), | ||||||
6877 | diag::err_static_data_member_not_allowed_in_anon_struct) | ||||||
6878 | << Name << RD->getTagKind(); | ||||||
6879 | Invalid = true; | ||||||
6880 | } else if (RD->isUnion()) { | ||||||
6881 | // C++98 [class.union]p1: If a union contains a static data member, | ||||||
6882 | // the program is ill-formed. C++11 drops this restriction. | ||||||
6883 | Diag(D.getIdentifierLoc(), | ||||||
6884 | getLangOpts().CPlusPlus11 | ||||||
6885 | ? diag::warn_cxx98_compat_static_data_member_in_union | ||||||
6886 | : diag::ext_static_data_member_in_union) << Name; | ||||||
6887 | } | ||||||
6888 | } | ||||||
6889 | } | ||||||
6890 | |||||||
6891 | // Match up the template parameter lists with the scope specifier, then | ||||||
6892 | // determine whether we have a template or a template specialization. | ||||||
6893 | bool InvalidScope = false; | ||||||
6894 | TemplateParams = MatchTemplateParametersToScopeSpecifier( | ||||||
6895 | D.getDeclSpec().getBeginLoc(), D.getIdentifierLoc(), | ||||||
6896 | D.getCXXScopeSpec(), | ||||||
6897 | D.getName().getKind() == UnqualifiedIdKind::IK_TemplateId | ||||||
6898 | ? D.getName().TemplateId | ||||||
6899 | : nullptr, | ||||||
6900 | TemplateParamLists, | ||||||
6901 | /*never a friend*/ false, IsMemberSpecialization, InvalidScope); | ||||||
6902 | Invalid |= InvalidScope; | ||||||
6903 | |||||||
6904 | if (TemplateParams) { | ||||||
6905 | if (!TemplateParams->size() && | ||||||
6906 | D.getName().getKind() != UnqualifiedIdKind::IK_TemplateId) { | ||||||
6907 | // There is an extraneous 'template<>' for this variable. Complain | ||||||
6908 | // about it, but allow the declaration of the variable. | ||||||
6909 | Diag(TemplateParams->getTemplateLoc(), | ||||||
6910 | diag::err_template_variable_noparams) | ||||||
6911 | << II | ||||||
6912 | << SourceRange(TemplateParams->getTemplateLoc(), | ||||||
6913 | TemplateParams->getRAngleLoc()); | ||||||
6914 | TemplateParams = nullptr; | ||||||
6915 | } else { | ||||||
6916 | if (D.getName().getKind() == UnqualifiedIdKind::IK_TemplateId) { | ||||||
6917 | // This is an explicit specialization or a partial specialization. | ||||||
6918 | // FIXME: Check that we can declare a specialization here. | ||||||
6919 | IsVariableTemplateSpecialization = true; | ||||||
6920 | IsPartialSpecialization = TemplateParams->size() > 0; | ||||||
6921 | } else { // if (TemplateParams->size() > 0) | ||||||
6922 | // This is a template declaration. | ||||||
6923 | IsVariableTemplate = true; | ||||||
6924 | |||||||
6925 | // Check that we can declare a template here. | ||||||
6926 | if (CheckTemplateDeclScope(S, TemplateParams)) | ||||||
6927 | return nullptr; | ||||||
6928 | |||||||
6929 | // Only C++1y supports variable templates (N3651). | ||||||
6930 | Diag(D.getIdentifierLoc(), | ||||||
6931 | getLangOpts().CPlusPlus14 | ||||||
6932 | ? diag::warn_cxx11_compat_variable_template | ||||||
6933 | : diag::ext_variable_template); | ||||||
6934 | } | ||||||
6935 | } | ||||||
6936 | } else { | ||||||
6937 | assert((Invalid ||(((Invalid || D.getName().getKind() != UnqualifiedIdKind::IK_TemplateId ) && "should have a 'template<>' for this decl" ) ? static_cast<void> (0) : __assert_fail ("(Invalid || D.getName().getKind() != UnqualifiedIdKind::IK_TemplateId) && \"should have a 'template<>' for this decl\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 6939, __PRETTY_FUNCTION__)) | ||||||
6938 | D.getName().getKind() != UnqualifiedIdKind::IK_TemplateId) &&(((Invalid || D.getName().getKind() != UnqualifiedIdKind::IK_TemplateId ) && "should have a 'template<>' for this decl" ) ? static_cast<void> (0) : __assert_fail ("(Invalid || D.getName().getKind() != UnqualifiedIdKind::IK_TemplateId) && \"should have a 'template<>' for this decl\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 6939, __PRETTY_FUNCTION__)) | ||||||
6939 | "should have a 'template<>' for this decl")(((Invalid || D.getName().getKind() != UnqualifiedIdKind::IK_TemplateId ) && "should have a 'template<>' for this decl" ) ? static_cast<void> (0) : __assert_fail ("(Invalid || D.getName().getKind() != UnqualifiedIdKind::IK_TemplateId) && \"should have a 'template<>' for this decl\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 6939, __PRETTY_FUNCTION__)); | ||||||
6940 | } | ||||||
6941 | |||||||
6942 | if (IsVariableTemplateSpecialization) { | ||||||
6943 | SourceLocation TemplateKWLoc = | ||||||
6944 | TemplateParamLists.size() > 0 | ||||||
6945 | ? TemplateParamLists[0]->getTemplateLoc() | ||||||
6946 | : SourceLocation(); | ||||||
6947 | DeclResult Res = ActOnVarTemplateSpecialization( | ||||||
6948 | S, D, TInfo, TemplateKWLoc, TemplateParams, SC, | ||||||
6949 | IsPartialSpecialization); | ||||||
6950 | if (Res.isInvalid()) | ||||||
6951 | return nullptr; | ||||||
6952 | NewVD = cast<VarDecl>(Res.get()); | ||||||
6953 | AddToScope = false; | ||||||
6954 | } else if (D.isDecompositionDeclarator()) { | ||||||
6955 | NewVD = DecompositionDecl::Create(Context, DC, D.getBeginLoc(), | ||||||
6956 | D.getIdentifierLoc(), R, TInfo, SC, | ||||||
6957 | Bindings); | ||||||
6958 | } else | ||||||
6959 | NewVD = VarDecl::Create(Context, DC, D.getBeginLoc(), | ||||||
6960 | D.getIdentifierLoc(), II, R, TInfo, SC); | ||||||
6961 | |||||||
6962 | // If this is supposed to be a variable template, create it as such. | ||||||
6963 | if (IsVariableTemplate) { | ||||||
6964 | NewTemplate = | ||||||
6965 | VarTemplateDecl::Create(Context, DC, D.getIdentifierLoc(), Name, | ||||||
6966 | TemplateParams, NewVD); | ||||||
6967 | NewVD->setDescribedVarTemplate(NewTemplate); | ||||||
6968 | } | ||||||
6969 | |||||||
6970 | // If this decl has an auto type in need of deduction, make a note of the | ||||||
6971 | // Decl so we can diagnose uses of it in its own initializer. | ||||||
6972 | if (R->getContainedDeducedType()) | ||||||
6973 | ParsingInitForAutoVars.insert(NewVD); | ||||||
6974 | |||||||
6975 | if (D.isInvalidType() || Invalid) { | ||||||
6976 | NewVD->setInvalidDecl(); | ||||||
6977 | if (NewTemplate) | ||||||
6978 | NewTemplate->setInvalidDecl(); | ||||||
6979 | } | ||||||
6980 | |||||||
6981 | SetNestedNameSpecifier(*this, NewVD, D); | ||||||
6982 | |||||||
6983 | // If we have any template parameter lists that don't directly belong to | ||||||
6984 | // the variable (matching the scope specifier), store them. | ||||||
6985 | unsigned VDTemplateParamLists = TemplateParams ? 1 : 0; | ||||||
6986 | if (TemplateParamLists.size() > VDTemplateParamLists) | ||||||
6987 | NewVD->setTemplateParameterListsInfo( | ||||||
6988 | Context, TemplateParamLists.drop_back(VDTemplateParamLists)); | ||||||
6989 | } | ||||||
6990 | |||||||
6991 | if (D.getDeclSpec().isInlineSpecified()) { | ||||||
6992 | if (!getLangOpts().CPlusPlus) { | ||||||
6993 | Diag(D.getDeclSpec().getInlineSpecLoc(), diag::err_inline_non_function) | ||||||
6994 | << 0; | ||||||
6995 | } else if (CurContext->isFunctionOrMethod()) { | ||||||
6996 | // 'inline' is not allowed on block scope variable declaration. | ||||||
6997 | Diag(D.getDeclSpec().getInlineSpecLoc(), | ||||||
6998 | diag::err_inline_declaration_block_scope) << Name | ||||||
6999 | << FixItHint::CreateRemoval(D.getDeclSpec().getInlineSpecLoc()); | ||||||
7000 | } else { | ||||||
7001 | Diag(D.getDeclSpec().getInlineSpecLoc(), | ||||||
7002 | getLangOpts().CPlusPlus17 ? diag::warn_cxx14_compat_inline_variable | ||||||
7003 | : diag::ext_inline_variable); | ||||||
7004 | NewVD->setInlineSpecified(); | ||||||
7005 | } | ||||||
7006 | } | ||||||
7007 | |||||||
7008 | // Set the lexical context. If the declarator has a C++ scope specifier, the | ||||||
7009 | // lexical context will be different from the semantic context. | ||||||
7010 | NewVD->setLexicalDeclContext(CurContext); | ||||||
7011 | if (NewTemplate) | ||||||
7012 | NewTemplate->setLexicalDeclContext(CurContext); | ||||||
7013 | |||||||
7014 | if (IsLocalExternDecl) { | ||||||
7015 | if (D.isDecompositionDeclarator()) | ||||||
7016 | for (auto *B : Bindings) | ||||||
7017 | B->setLocalExternDecl(); | ||||||
7018 | else | ||||||
7019 | NewVD->setLocalExternDecl(); | ||||||
7020 | } | ||||||
7021 | |||||||
7022 | bool EmitTLSUnsupportedError = false; | ||||||
7023 | if (DeclSpec::TSCS TSCS = D.getDeclSpec().getThreadStorageClassSpec()) { | ||||||
7024 | // C++11 [dcl.stc]p4: | ||||||
7025 | // When thread_local is applied to a variable of block scope the | ||||||
7026 | // storage-class-specifier static is implied if it does not appear | ||||||
7027 | // explicitly. | ||||||
7028 | // Core issue: 'static' is not implied if the variable is declared | ||||||
7029 | // 'extern'. | ||||||
7030 | if (NewVD->hasLocalStorage() && | ||||||
7031 | (SCSpec != DeclSpec::SCS_unspecified || | ||||||
7032 | TSCS != DeclSpec::TSCS_thread_local || | ||||||
7033 | !DC->isFunctionOrMethod())) | ||||||
7034 | Diag(D.getDeclSpec().getThreadStorageClassSpecLoc(), | ||||||
7035 | diag::err_thread_non_global) | ||||||
7036 | << DeclSpec::getSpecifierName(TSCS); | ||||||
7037 | else if (!Context.getTargetInfo().isTLSSupported()) { | ||||||
7038 | if (getLangOpts().CUDA || getLangOpts().OpenMPIsDevice) { | ||||||
7039 | // Postpone error emission until we've collected attributes required to | ||||||
7040 | // figure out whether it's a host or device variable and whether the | ||||||
7041 | // error should be ignored. | ||||||
7042 | EmitTLSUnsupportedError = true; | ||||||
7043 | // We still need to mark the variable as TLS so it shows up in AST with | ||||||
7044 | // proper storage class for other tools to use even if we're not going | ||||||
7045 | // to emit any code for it. | ||||||
7046 | NewVD->setTSCSpec(TSCS); | ||||||
7047 | } else | ||||||
7048 | Diag(D.getDeclSpec().getThreadStorageClassSpecLoc(), | ||||||
7049 | diag::err_thread_unsupported); | ||||||
7050 | } else | ||||||
7051 | NewVD->setTSCSpec(TSCS); | ||||||
7052 | } | ||||||
7053 | |||||||
7054 | switch (D.getDeclSpec().getConstexprSpecifier()) { | ||||||
7055 | case CSK_unspecified: | ||||||
7056 | break; | ||||||
7057 | |||||||
7058 | case CSK_consteval: | ||||||
7059 | Diag(D.getDeclSpec().getConstexprSpecLoc(), | ||||||
7060 | diag::err_constexpr_wrong_decl_kind) | ||||||
7061 | << D.getDeclSpec().getConstexprSpecifier(); | ||||||
7062 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||||
7063 | |||||||
7064 | case CSK_constexpr: | ||||||
7065 | NewVD->setConstexpr(true); | ||||||
7066 | // C++1z [dcl.spec.constexpr]p1: | ||||||
7067 | // A static data member declared with the constexpr specifier is | ||||||
7068 | // implicitly an inline variable. | ||||||
7069 | if (NewVD->isStaticDataMember() && | ||||||
7070 | (getLangOpts().CPlusPlus17 || | ||||||
7071 | Context.getTargetInfo().getCXXABI().isMicrosoft())) | ||||||
7072 | NewVD->setImplicitlyInline(); | ||||||
7073 | break; | ||||||
7074 | |||||||
7075 | case CSK_constinit: | ||||||
7076 | if (!NewVD->hasGlobalStorage()) | ||||||
7077 | Diag(D.getDeclSpec().getConstexprSpecLoc(), | ||||||
7078 | diag::err_constinit_local_variable); | ||||||
7079 | else | ||||||
7080 | NewVD->addAttr(ConstInitAttr::Create( | ||||||
7081 | Context, D.getDeclSpec().getConstexprSpecLoc(), | ||||||
7082 | AttributeCommonInfo::AS_Keyword, ConstInitAttr::Keyword_constinit)); | ||||||
7083 | break; | ||||||
7084 | } | ||||||
7085 | |||||||
7086 | // C99 6.7.4p3 | ||||||
7087 | // An inline definition of a function with external linkage shall | ||||||
7088 | // not contain a definition of a modifiable object with static or | ||||||
7089 | // thread storage duration... | ||||||
7090 | // We only apply this when the function is required to be defined | ||||||
7091 | // elsewhere, i.e. when the function is not 'extern inline'. Note | ||||||
7092 | // that a local variable with thread storage duration still has to | ||||||
7093 | // be marked 'static'. Also note that it's possible to get these | ||||||
7094 | // semantics in C++ using __attribute__((gnu_inline)). | ||||||
7095 | if (SC == SC_Static && S->getFnParent() != nullptr && | ||||||
7096 | !NewVD->getType().isConstQualified()) { | ||||||
7097 | FunctionDecl *CurFD = getCurFunctionDecl(); | ||||||
7098 | if (CurFD && isFunctionDefinitionDiscarded(*this, CurFD)) { | ||||||
7099 | Diag(D.getDeclSpec().getStorageClassSpecLoc(), | ||||||
7100 | diag::warn_static_local_in_extern_inline); | ||||||
7101 | MaybeSuggestAddingStaticToDecl(CurFD); | ||||||
7102 | } | ||||||
7103 | } | ||||||
7104 | |||||||
7105 | if (D.getDeclSpec().isModulePrivateSpecified()) { | ||||||
7106 | if (IsVariableTemplateSpecialization) | ||||||
7107 | Diag(NewVD->getLocation(), diag::err_module_private_specialization) | ||||||
7108 | << (IsPartialSpecialization ? 1 : 0) | ||||||
7109 | << FixItHint::CreateRemoval( | ||||||
7110 | D.getDeclSpec().getModulePrivateSpecLoc()); | ||||||
7111 | else if (IsMemberSpecialization) | ||||||
7112 | Diag(NewVD->getLocation(), diag::err_module_private_specialization) | ||||||
7113 | << 2 | ||||||
7114 | << FixItHint::CreateRemoval(D.getDeclSpec().getModulePrivateSpecLoc()); | ||||||
7115 | else if (NewVD->hasLocalStorage()) | ||||||
7116 | Diag(NewVD->getLocation(), diag::err_module_private_local) | ||||||
7117 | << 0 << NewVD->getDeclName() | ||||||
7118 | << SourceRange(D.getDeclSpec().getModulePrivateSpecLoc()) | ||||||
7119 | << FixItHint::CreateRemoval(D.getDeclSpec().getModulePrivateSpecLoc()); | ||||||
7120 | else { | ||||||
7121 | NewVD->setModulePrivate(); | ||||||
7122 | if (NewTemplate) | ||||||
7123 | NewTemplate->setModulePrivate(); | ||||||
7124 | for (auto *B : Bindings) | ||||||
7125 | B->setModulePrivate(); | ||||||
7126 | } | ||||||
7127 | } | ||||||
7128 | |||||||
7129 | if (getLangOpts().OpenCL) { | ||||||
7130 | |||||||
7131 | deduceOpenCLAddressSpace(NewVD); | ||||||
7132 | |||||||
7133 | diagnoseOpenCLTypes(S, *this, D, DC, NewVD->getType()); | ||||||
7134 | } | ||||||
7135 | |||||||
7136 | // Handle attributes prior to checking for duplicates in MergeVarDecl | ||||||
7137 | ProcessDeclAttributes(S, NewVD, D); | ||||||
7138 | |||||||
7139 | if (getLangOpts().CUDA || getLangOpts().OpenMPIsDevice) { | ||||||
7140 | if (EmitTLSUnsupportedError && | ||||||
7141 | ((getLangOpts().CUDA && DeclAttrsMatchCUDAMode(getLangOpts(), NewVD)) || | ||||||
7142 | (getLangOpts().OpenMPIsDevice && | ||||||
7143 | OMPDeclareTargetDeclAttr::isDeclareTargetDeclaration(NewVD)))) | ||||||
7144 | Diag(D.getDeclSpec().getThreadStorageClassSpecLoc(), | ||||||
7145 | diag::err_thread_unsupported); | ||||||
7146 | // CUDA B.2.5: "__shared__ and __constant__ variables have implied static | ||||||
7147 | // storage [duration]." | ||||||
7148 | if (SC == SC_None && S->getFnParent() != nullptr && | ||||||
7149 | (NewVD->hasAttr<CUDASharedAttr>() || | ||||||
7150 | NewVD->hasAttr<CUDAConstantAttr>())) { | ||||||
7151 | NewVD->setStorageClass(SC_Static); | ||||||
7152 | } | ||||||
7153 | } | ||||||
7154 | |||||||
7155 | // Ensure that dllimport globals without explicit storage class are treated as | ||||||
7156 | // extern. The storage class is set above using parsed attributes. Now we can | ||||||
7157 | // check the VarDecl itself. | ||||||
7158 | assert(!NewVD->hasAttr<DLLImportAttr>() ||((!NewVD->hasAttr<DLLImportAttr>() || NewVD->getAttr <DLLImportAttr>()->isInherited() || NewVD->isStaticDataMember () || NewVD->getStorageClass() != SC_None) ? static_cast< void> (0) : __assert_fail ("!NewVD->hasAttr<DLLImportAttr>() || NewVD->getAttr<DLLImportAttr>()->isInherited() || NewVD->isStaticDataMember() || NewVD->getStorageClass() != SC_None" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 7160, __PRETTY_FUNCTION__)) | ||||||
7159 | NewVD->getAttr<DLLImportAttr>()->isInherited() ||((!NewVD->hasAttr<DLLImportAttr>() || NewVD->getAttr <DLLImportAttr>()->isInherited() || NewVD->isStaticDataMember () || NewVD->getStorageClass() != SC_None) ? static_cast< void> (0) : __assert_fail ("!NewVD->hasAttr<DLLImportAttr>() || NewVD->getAttr<DLLImportAttr>()->isInherited() || NewVD->isStaticDataMember() || NewVD->getStorageClass() != SC_None" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 7160, __PRETTY_FUNCTION__)) | ||||||
7160 | NewVD->isStaticDataMember() || NewVD->getStorageClass() != SC_None)((!NewVD->hasAttr<DLLImportAttr>() || NewVD->getAttr <DLLImportAttr>()->isInherited() || NewVD->isStaticDataMember () || NewVD->getStorageClass() != SC_None) ? static_cast< void> (0) : __assert_fail ("!NewVD->hasAttr<DLLImportAttr>() || NewVD->getAttr<DLLImportAttr>()->isInherited() || NewVD->isStaticDataMember() || NewVD->getStorageClass() != SC_None" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 7160, __PRETTY_FUNCTION__)); | ||||||
7161 | |||||||
7162 | // In auto-retain/release, infer strong retension for variables of | ||||||
7163 | // retainable type. | ||||||
7164 | if (getLangOpts().ObjCAutoRefCount && inferObjCARCLifetime(NewVD)) | ||||||
7165 | NewVD->setInvalidDecl(); | ||||||
7166 | |||||||
7167 | // Handle GNU asm-label extension (encoded as an attribute). | ||||||
7168 | if (Expr *E = (Expr*)D.getAsmLabel()) { | ||||||
7169 | // The parser guarantees this is a string. | ||||||
7170 | StringLiteral *SE = cast<StringLiteral>(E); | ||||||
7171 | StringRef Label = SE->getString(); | ||||||
7172 | if (S->getFnParent() != nullptr) { | ||||||
7173 | switch (SC) { | ||||||
7174 | case SC_None: | ||||||
7175 | case SC_Auto: | ||||||
7176 | Diag(E->getExprLoc(), diag::warn_asm_label_on_auto_decl) << Label; | ||||||
7177 | break; | ||||||
7178 | case SC_Register: | ||||||
7179 | // Local Named register | ||||||
7180 | if (!Context.getTargetInfo().isValidGCCRegisterName(Label) && | ||||||
7181 | DeclAttrsMatchCUDAMode(getLangOpts(), getCurFunctionDecl())) | ||||||
7182 | Diag(E->getExprLoc(), diag::err_asm_unknown_register_name) << Label; | ||||||
7183 | break; | ||||||
7184 | case SC_Static: | ||||||
7185 | case SC_Extern: | ||||||
7186 | case SC_PrivateExtern: | ||||||
7187 | break; | ||||||
7188 | } | ||||||
7189 | } else if (SC == SC_Register) { | ||||||
7190 | // Global Named register | ||||||
7191 | if (DeclAttrsMatchCUDAMode(getLangOpts(), NewVD)) { | ||||||
7192 | const auto &TI = Context.getTargetInfo(); | ||||||
7193 | bool HasSizeMismatch; | ||||||
7194 | |||||||
7195 | if (!TI.isValidGCCRegisterName(Label)) | ||||||
7196 | Diag(E->getExprLoc(), diag::err_asm_unknown_register_name) << Label; | ||||||
7197 | else if (!TI.validateGlobalRegisterVariable(Label, | ||||||
7198 | Context.getTypeSize(R), | ||||||
7199 | HasSizeMismatch)) | ||||||
7200 | Diag(E->getExprLoc(), diag::err_asm_invalid_global_var_reg) << Label; | ||||||
7201 | else if (HasSizeMismatch) | ||||||
7202 | Diag(E->getExprLoc(), diag::err_asm_register_size_mismatch) << Label; | ||||||
7203 | } | ||||||
7204 | |||||||
7205 | if (!R->isIntegralType(Context) && !R->isPointerType()) { | ||||||
7206 | Diag(D.getBeginLoc(), diag::err_asm_bad_register_type); | ||||||
7207 | NewVD->setInvalidDecl(true); | ||||||
7208 | } | ||||||
7209 | } | ||||||
7210 | |||||||
7211 | NewVD->addAttr(AsmLabelAttr::Create(Context, Label, | ||||||
7212 | /*IsLiteralLabel=*/true, | ||||||
7213 | SE->getStrTokenLoc(0))); | ||||||
7214 | } else if (!ExtnameUndeclaredIdentifiers.empty()) { | ||||||
7215 | llvm::DenseMap<IdentifierInfo*,AsmLabelAttr*>::iterator I = | ||||||
7216 | ExtnameUndeclaredIdentifiers.find(NewVD->getIdentifier()); | ||||||
7217 | if (I != ExtnameUndeclaredIdentifiers.end()) { | ||||||
7218 | if (isDeclExternC(NewVD)) { | ||||||
7219 | NewVD->addAttr(I->second); | ||||||
7220 | ExtnameUndeclaredIdentifiers.erase(I); | ||||||
7221 | } else | ||||||
7222 | Diag(NewVD->getLocation(), diag::warn_redefine_extname_not_applied) | ||||||
7223 | << /*Variable*/1 << NewVD; | ||||||
7224 | } | ||||||
7225 | } | ||||||
7226 | |||||||
7227 | // Find the shadowed declaration before filtering for scope. | ||||||
7228 | NamedDecl *ShadowedDecl = D.getCXXScopeSpec().isEmpty() | ||||||
7229 | ? getShadowedDeclaration(NewVD, Previous) | ||||||
7230 | : nullptr; | ||||||
7231 | |||||||
7232 | // Don't consider existing declarations that are in a different | ||||||
7233 | // scope and are out-of-semantic-context declarations (if the new | ||||||
7234 | // declaration has linkage). | ||||||
7235 | FilterLookupForScope(Previous, OriginalDC, S, shouldConsiderLinkage(NewVD), | ||||||
7236 | D.getCXXScopeSpec().isNotEmpty() || | ||||||
7237 | IsMemberSpecialization || | ||||||
7238 | IsVariableTemplateSpecialization); | ||||||
7239 | |||||||
7240 | // Check whether the previous declaration is in the same block scope. This | ||||||
7241 | // affects whether we merge types with it, per C++11 [dcl.array]p3. | ||||||
7242 | if (getLangOpts().CPlusPlus && | ||||||
7243 | NewVD->isLocalVarDecl() && NewVD->hasExternalStorage()) | ||||||
7244 | NewVD->setPreviousDeclInSameBlockScope( | ||||||
7245 | Previous.isSingleResult() && !Previous.isShadowed() && | ||||||
7246 | isDeclInScope(Previous.getFoundDecl(), OriginalDC, S, false)); | ||||||
7247 | |||||||
7248 | if (!getLangOpts().CPlusPlus) { | ||||||
7249 | D.setRedeclaration(CheckVariableDeclaration(NewVD, Previous)); | ||||||
7250 | } else { | ||||||
7251 | // If this is an explicit specialization of a static data member, check it. | ||||||
7252 | if (IsMemberSpecialization && !NewVD->isInvalidDecl() && | ||||||
7253 | CheckMemberSpecialization(NewVD, Previous)) | ||||||
7254 | NewVD->setInvalidDecl(); | ||||||
7255 | |||||||
7256 | // Merge the decl with the existing one if appropriate. | ||||||
7257 | if (!Previous.empty()) { | ||||||
7258 | if (Previous.isSingleResult() && | ||||||
7259 | isa<FieldDecl>(Previous.getFoundDecl()) && | ||||||
7260 | D.getCXXScopeSpec().isSet()) { | ||||||
7261 | // The user tried to define a non-static data member | ||||||
7262 | // out-of-line (C++ [dcl.meaning]p1). | ||||||
7263 | Diag(NewVD->getLocation(), diag::err_nonstatic_member_out_of_line) | ||||||
7264 | << D.getCXXScopeSpec().getRange(); | ||||||
7265 | Previous.clear(); | ||||||
7266 | NewVD->setInvalidDecl(); | ||||||
7267 | } | ||||||
7268 | } else if (D.getCXXScopeSpec().isSet()) { | ||||||
7269 | // No previous declaration in the qualifying scope. | ||||||
7270 | Diag(D.getIdentifierLoc(), diag::err_no_member) | ||||||
7271 | << Name << computeDeclContext(D.getCXXScopeSpec(), true) | ||||||
7272 | << D.getCXXScopeSpec().getRange(); | ||||||
7273 | NewVD->setInvalidDecl(); | ||||||
7274 | } | ||||||
7275 | |||||||
7276 | if (!IsVariableTemplateSpecialization) | ||||||
7277 | D.setRedeclaration(CheckVariableDeclaration(NewVD, Previous)); | ||||||
7278 | |||||||
7279 | if (NewTemplate) { | ||||||
7280 | VarTemplateDecl *PrevVarTemplate = | ||||||
7281 | NewVD->getPreviousDecl() | ||||||
7282 | ? NewVD->getPreviousDecl()->getDescribedVarTemplate() | ||||||
7283 | : nullptr; | ||||||
7284 | |||||||
7285 | // Check the template parameter list of this declaration, possibly | ||||||
7286 | // merging in the template parameter list from the previous variable | ||||||
7287 | // template declaration. | ||||||
7288 | if (CheckTemplateParameterList( | ||||||
7289 | TemplateParams, | ||||||
7290 | PrevVarTemplate ? PrevVarTemplate->getTemplateParameters() | ||||||
7291 | : nullptr, | ||||||
7292 | (D.getCXXScopeSpec().isSet() && DC && DC->isRecord() && | ||||||
7293 | DC->isDependentContext()) | ||||||
7294 | ? TPC_ClassTemplateMember | ||||||
7295 | : TPC_VarTemplate)) | ||||||
7296 | NewVD->setInvalidDecl(); | ||||||
7297 | |||||||
7298 | // If we are providing an explicit specialization of a static variable | ||||||
7299 | // template, make a note of that. | ||||||
7300 | if (PrevVarTemplate && | ||||||
7301 | PrevVarTemplate->getInstantiatedFromMemberTemplate()) | ||||||
7302 | PrevVarTemplate->setMemberSpecialization(); | ||||||
7303 | } | ||||||
7304 | } | ||||||
7305 | |||||||
7306 | // Diagnose shadowed variables iff this isn't a redeclaration. | ||||||
7307 | if (ShadowedDecl && !D.isRedeclaration()) | ||||||
7308 | CheckShadow(NewVD, ShadowedDecl, Previous); | ||||||
7309 | |||||||
7310 | ProcessPragmaWeak(S, NewVD); | ||||||
7311 | |||||||
7312 | // If this is the first declaration of an extern C variable, update | ||||||
7313 | // the map of such variables. | ||||||
7314 | if (NewVD->isFirstDecl() && !NewVD->isInvalidDecl() && | ||||||
7315 | isIncompleteDeclExternC(*this, NewVD)) | ||||||
7316 | RegisterLocallyScopedExternCDecl(NewVD, S); | ||||||
7317 | |||||||
7318 | if (getLangOpts().CPlusPlus && NewVD->isStaticLocal()) { | ||||||
7319 | MangleNumberingContext *MCtx; | ||||||
7320 | Decl *ManglingContextDecl; | ||||||
7321 | std::tie(MCtx, ManglingContextDecl) = | ||||||
7322 | getCurrentMangleNumberContext(NewVD->getDeclContext()); | ||||||
7323 | if (MCtx) { | ||||||
7324 | Context.setManglingNumber( | ||||||
7325 | NewVD, MCtx->getManglingNumber( | ||||||
7326 | NewVD, getMSManglingNumber(getLangOpts(), S))); | ||||||
7327 | Context.setStaticLocalNumber(NewVD, MCtx->getStaticLocalNumber(NewVD)); | ||||||
7328 | } | ||||||
7329 | } | ||||||
7330 | |||||||
7331 | // Special handling of variable named 'main'. | ||||||
7332 | if (Name.getAsIdentifierInfo() && Name.getAsIdentifierInfo()->isStr("main") && | ||||||
7333 | NewVD->getDeclContext()->getRedeclContext()->isTranslationUnit() && | ||||||
7334 | !getLangOpts().Freestanding && !NewVD->getDescribedVarTemplate()) { | ||||||
7335 | |||||||
7336 | // C++ [basic.start.main]p3 | ||||||
7337 | // A program that declares a variable main at global scope is ill-formed. | ||||||
7338 | if (getLangOpts().CPlusPlus) | ||||||
7339 | Diag(D.getBeginLoc(), diag::err_main_global_variable); | ||||||
7340 | |||||||
7341 | // In C, and external-linkage variable named main results in undefined | ||||||
7342 | // behavior. | ||||||
7343 | else if (NewVD->hasExternalFormalLinkage()) | ||||||
7344 | Diag(D.getBeginLoc(), diag::warn_main_redefined); | ||||||
7345 | } | ||||||
7346 | |||||||
7347 | if (D.isRedeclaration() && !Previous.empty()) { | ||||||
7348 | NamedDecl *Prev = Previous.getRepresentativeDecl(); | ||||||
7349 | checkDLLAttributeRedeclaration(*this, Prev, NewVD, IsMemberSpecialization, | ||||||
7350 | D.isFunctionDefinition()); | ||||||
7351 | } | ||||||
7352 | |||||||
7353 | if (NewTemplate) { | ||||||
7354 | if (NewVD->isInvalidDecl()) | ||||||
7355 | NewTemplate->setInvalidDecl(); | ||||||
7356 | ActOnDocumentableDecl(NewTemplate); | ||||||
7357 | return NewTemplate; | ||||||
7358 | } | ||||||
7359 | |||||||
7360 | if (IsMemberSpecialization && !NewVD->isInvalidDecl()) | ||||||
7361 | CompleteMemberSpecialization(NewVD, Previous); | ||||||
7362 | |||||||
7363 | return NewVD; | ||||||
7364 | } | ||||||
7365 | |||||||
7366 | /// Enum describing the %select options in diag::warn_decl_shadow. | ||||||
7367 | enum ShadowedDeclKind { | ||||||
7368 | SDK_Local, | ||||||
7369 | SDK_Global, | ||||||
7370 | SDK_StaticMember, | ||||||
7371 | SDK_Field, | ||||||
7372 | SDK_Typedef, | ||||||
7373 | SDK_Using | ||||||
7374 | }; | ||||||
7375 | |||||||
7376 | /// Determine what kind of declaration we're shadowing. | ||||||
7377 | static ShadowedDeclKind computeShadowedDeclKind(const NamedDecl *ShadowedDecl, | ||||||
7378 | const DeclContext *OldDC) { | ||||||
7379 | if (isa<TypeAliasDecl>(ShadowedDecl)) | ||||||
7380 | return SDK_Using; | ||||||
7381 | else if (isa<TypedefDecl>(ShadowedDecl)) | ||||||
7382 | return SDK_Typedef; | ||||||
7383 | else if (isa<RecordDecl>(OldDC)) | ||||||
7384 | return isa<FieldDecl>(ShadowedDecl) ? SDK_Field : SDK_StaticMember; | ||||||
7385 | |||||||
7386 | return OldDC->isFileContext() ? SDK_Global : SDK_Local; | ||||||
7387 | } | ||||||
7388 | |||||||
7389 | /// Return the location of the capture if the given lambda captures the given | ||||||
7390 | /// variable \p VD, or an invalid source location otherwise. | ||||||
7391 | static SourceLocation getCaptureLocation(const LambdaScopeInfo *LSI, | ||||||
7392 | const VarDecl *VD) { | ||||||
7393 | for (const Capture &Capture : LSI->Captures) { | ||||||
7394 | if (Capture.isVariableCapture() && Capture.getVariable() == VD) | ||||||
7395 | return Capture.getLocation(); | ||||||
7396 | } | ||||||
7397 | return SourceLocation(); | ||||||
7398 | } | ||||||
7399 | |||||||
7400 | static bool shouldWarnIfShadowedDecl(const DiagnosticsEngine &Diags, | ||||||
7401 | const LookupResult &R) { | ||||||
7402 | // Only diagnose if we're shadowing an unambiguous field or variable. | ||||||
7403 | if (R.getResultKind() != LookupResult::Found) | ||||||
7404 | return false; | ||||||
7405 | |||||||
7406 | // Return false if warning is ignored. | ||||||
7407 | return !Diags.isIgnored(diag::warn_decl_shadow, R.getNameLoc()); | ||||||
7408 | } | ||||||
7409 | |||||||
7410 | /// Return the declaration shadowed by the given variable \p D, or null | ||||||
7411 | /// if it doesn't shadow any declaration or shadowing warnings are disabled. | ||||||
7412 | NamedDecl *Sema::getShadowedDeclaration(const VarDecl *D, | ||||||
7413 | const LookupResult &R) { | ||||||
7414 | if (!shouldWarnIfShadowedDecl(Diags, R)) | ||||||
7415 | return nullptr; | ||||||
7416 | |||||||
7417 | // Don't diagnose declarations at file scope. | ||||||
7418 | if (D->hasGlobalStorage()) | ||||||
7419 | return nullptr; | ||||||
7420 | |||||||
7421 | NamedDecl *ShadowedDecl = R.getFoundDecl(); | ||||||
7422 | return isa<VarDecl>(ShadowedDecl) || isa<FieldDecl>(ShadowedDecl) | ||||||
7423 | ? ShadowedDecl | ||||||
7424 | : nullptr; | ||||||
7425 | } | ||||||
7426 | |||||||
7427 | /// Return the declaration shadowed by the given typedef \p D, or null | ||||||
7428 | /// if it doesn't shadow any declaration or shadowing warnings are disabled. | ||||||
7429 | NamedDecl *Sema::getShadowedDeclaration(const TypedefNameDecl *D, | ||||||
7430 | const LookupResult &R) { | ||||||
7431 | // Don't warn if typedef declaration is part of a class | ||||||
7432 | if (D->getDeclContext()->isRecord()) | ||||||
7433 | return nullptr; | ||||||
7434 | |||||||
7435 | if (!shouldWarnIfShadowedDecl(Diags, R)) | ||||||
7436 | return nullptr; | ||||||
7437 | |||||||
7438 | NamedDecl *ShadowedDecl = R.getFoundDecl(); | ||||||
7439 | return isa<TypedefNameDecl>(ShadowedDecl) ? ShadowedDecl : nullptr; | ||||||
7440 | } | ||||||
7441 | |||||||
7442 | /// Diagnose variable or built-in function shadowing. Implements | ||||||
7443 | /// -Wshadow. | ||||||
7444 | /// | ||||||
7445 | /// This method is called whenever a VarDecl is added to a "useful" | ||||||
7446 | /// scope. | ||||||
7447 | /// | ||||||
7448 | /// \param ShadowedDecl the declaration that is shadowed by the given variable | ||||||
7449 | /// \param R the lookup of the name | ||||||
7450 | /// | ||||||
7451 | void Sema::CheckShadow(NamedDecl *D, NamedDecl *ShadowedDecl, | ||||||
7452 | const LookupResult &R) { | ||||||
7453 | DeclContext *NewDC = D->getDeclContext(); | ||||||
7454 | |||||||
7455 | if (FieldDecl *FD = dyn_cast<FieldDecl>(ShadowedDecl)) { | ||||||
7456 | // Fields are not shadowed by variables in C++ static methods. | ||||||
7457 | if (CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(NewDC)) | ||||||
7458 | if (MD->isStatic()) | ||||||
7459 | return; | ||||||
7460 | |||||||
7461 | // Fields shadowed by constructor parameters are a special case. Usually | ||||||
7462 | // the constructor initializes the field with the parameter. | ||||||
7463 | if (isa<CXXConstructorDecl>(NewDC)) | ||||||
7464 | if (const auto PVD = dyn_cast<ParmVarDecl>(D)) { | ||||||
7465 | // Remember that this was shadowed so we can either warn about its | ||||||
7466 | // modification or its existence depending on warning settings. | ||||||
7467 | ShadowingDecls.insert({PVD->getCanonicalDecl(), FD}); | ||||||
7468 | return; | ||||||
7469 | } | ||||||
7470 | } | ||||||
7471 | |||||||
7472 | if (VarDecl *shadowedVar = dyn_cast<VarDecl>(ShadowedDecl)) | ||||||
7473 | if (shadowedVar->isExternC()) { | ||||||
7474 | // For shadowing external vars, make sure that we point to the global | ||||||
7475 | // declaration, not a locally scoped extern declaration. | ||||||
7476 | for (auto I : shadowedVar->redecls()) | ||||||
7477 | if (I->isFileVarDecl()) { | ||||||
7478 | ShadowedDecl = I; | ||||||
7479 | break; | ||||||
7480 | } | ||||||
7481 | } | ||||||
7482 | |||||||
7483 | DeclContext *OldDC = ShadowedDecl->getDeclContext()->getRedeclContext(); | ||||||
7484 | |||||||
7485 | unsigned WarningDiag = diag::warn_decl_shadow; | ||||||
7486 | SourceLocation CaptureLoc; | ||||||
7487 | if (isa<VarDecl>(D) && isa<VarDecl>(ShadowedDecl) && NewDC && | ||||||
7488 | isa<CXXMethodDecl>(NewDC)) { | ||||||
7489 | if (const auto *RD = dyn_cast<CXXRecordDecl>(NewDC->getParent())) { | ||||||
7490 | if (RD->isLambda() && OldDC->Encloses(NewDC->getLexicalParent())) { | ||||||
7491 | if (RD->getLambdaCaptureDefault() == LCD_None) { | ||||||
7492 | // Try to avoid warnings for lambdas with an explicit capture list. | ||||||
7493 | const auto *LSI = cast<LambdaScopeInfo>(getCurFunction()); | ||||||
7494 | // Warn only when the lambda captures the shadowed decl explicitly. | ||||||
7495 | CaptureLoc = getCaptureLocation(LSI, cast<VarDecl>(ShadowedDecl)); | ||||||
7496 | if (CaptureLoc.isInvalid()) | ||||||
7497 | WarningDiag = diag::warn_decl_shadow_uncaptured_local; | ||||||
7498 | } else { | ||||||
7499 | // Remember that this was shadowed so we can avoid the warning if the | ||||||
7500 | // shadowed decl isn't captured and the warning settings allow it. | ||||||
7501 | cast<LambdaScopeInfo>(getCurFunction()) | ||||||
7502 | ->ShadowingDecls.push_back( | ||||||
7503 | {cast<VarDecl>(D), cast<VarDecl>(ShadowedDecl)}); | ||||||
7504 | return; | ||||||
7505 | } | ||||||
7506 | } | ||||||
7507 | |||||||
7508 | if (cast<VarDecl>(ShadowedDecl)->hasLocalStorage()) { | ||||||
7509 | // A variable can't shadow a local variable in an enclosing scope, if | ||||||
7510 | // they are separated by a non-capturing declaration context. | ||||||
7511 | for (DeclContext *ParentDC = NewDC; | ||||||
7512 | ParentDC && !ParentDC->Equals(OldDC); | ||||||
7513 | ParentDC = getLambdaAwareParentOfDeclContext(ParentDC)) { | ||||||
7514 | // Only block literals, captured statements, and lambda expressions | ||||||
7515 | // can capture; other scopes don't. | ||||||
7516 | if (!isa<BlockDecl>(ParentDC) && !isa<CapturedDecl>(ParentDC) && | ||||||
7517 | !isLambdaCallOperator(ParentDC)) { | ||||||
7518 | return; | ||||||
7519 | } | ||||||
7520 | } | ||||||
7521 | } | ||||||
7522 | } | ||||||
7523 | } | ||||||
7524 | |||||||
7525 | // Only warn about certain kinds of shadowing for class members. | ||||||
7526 | if (NewDC && NewDC->isRecord()) { | ||||||
7527 | // In particular, don't warn about shadowing non-class members. | ||||||
7528 | if (!OldDC->isRecord()) | ||||||
7529 | return; | ||||||
7530 | |||||||
7531 | // TODO: should we warn about static data members shadowing | ||||||
7532 | // static data members from base classes? | ||||||
7533 | |||||||
7534 | // TODO: don't diagnose for inaccessible shadowed members. | ||||||
7535 | // This is hard to do perfectly because we might friend the | ||||||
7536 | // shadowing context, but that's just a false negative. | ||||||
7537 | } | ||||||
7538 | |||||||
7539 | |||||||
7540 | DeclarationName Name = R.getLookupName(); | ||||||
7541 | |||||||
7542 | // Emit warning and note. | ||||||
7543 | if (getSourceManager().isInSystemMacro(R.getNameLoc())) | ||||||
7544 | return; | ||||||
7545 | ShadowedDeclKind Kind = computeShadowedDeclKind(ShadowedDecl, OldDC); | ||||||
7546 | Diag(R.getNameLoc(), WarningDiag) << Name << Kind << OldDC; | ||||||
7547 | if (!CaptureLoc.isInvalid()) | ||||||
7548 | Diag(CaptureLoc, diag::note_var_explicitly_captured_here) | ||||||
7549 | << Name << /*explicitly*/ 1; | ||||||
7550 | Diag(ShadowedDecl->getLocation(), diag::note_previous_declaration); | ||||||
7551 | } | ||||||
7552 | |||||||
7553 | /// Diagnose shadowing for variables shadowed in the lambda record \p LambdaRD | ||||||
7554 | /// when these variables are captured by the lambda. | ||||||
7555 | void Sema::DiagnoseShadowingLambdaDecls(const LambdaScopeInfo *LSI) { | ||||||
7556 | for (const auto &Shadow : LSI->ShadowingDecls) { | ||||||
7557 | const VarDecl *ShadowedDecl = Shadow.ShadowedDecl; | ||||||
7558 | // Try to avoid the warning when the shadowed decl isn't captured. | ||||||
7559 | SourceLocation CaptureLoc = getCaptureLocation(LSI, ShadowedDecl); | ||||||
7560 | const DeclContext *OldDC = ShadowedDecl->getDeclContext(); | ||||||
7561 | Diag(Shadow.VD->getLocation(), CaptureLoc.isInvalid() | ||||||
7562 | ? diag::warn_decl_shadow_uncaptured_local | ||||||
7563 | : diag::warn_decl_shadow) | ||||||
7564 | << Shadow.VD->getDeclName() | ||||||
7565 | << computeShadowedDeclKind(ShadowedDecl, OldDC) << OldDC; | ||||||
7566 | if (!CaptureLoc.isInvalid()) | ||||||
7567 | Diag(CaptureLoc, diag::note_var_explicitly_captured_here) | ||||||
7568 | << Shadow.VD->getDeclName() << /*explicitly*/ 0; | ||||||
7569 | Diag(ShadowedDecl->getLocation(), diag::note_previous_declaration); | ||||||
7570 | } | ||||||
7571 | } | ||||||
7572 | |||||||
7573 | /// Check -Wshadow without the advantage of a previous lookup. | ||||||
7574 | void Sema::CheckShadow(Scope *S, VarDecl *D) { | ||||||
7575 | if (Diags.isIgnored(diag::warn_decl_shadow, D->getLocation())) | ||||||
7576 | return; | ||||||
7577 | |||||||
7578 | LookupResult R(*this, D->getDeclName(), D->getLocation(), | ||||||
7579 | Sema::LookupOrdinaryName, Sema::ForVisibleRedeclaration); | ||||||
7580 | LookupName(R, S); | ||||||
7581 | if (NamedDecl *ShadowedDecl = getShadowedDeclaration(D, R)) | ||||||
7582 | CheckShadow(D, ShadowedDecl, R); | ||||||
7583 | } | ||||||
7584 | |||||||
7585 | /// Check if 'E', which is an expression that is about to be modified, refers | ||||||
7586 | /// to a constructor parameter that shadows a field. | ||||||
7587 | void Sema::CheckShadowingDeclModification(Expr *E, SourceLocation Loc) { | ||||||
7588 | // Quickly ignore expressions that can't be shadowing ctor parameters. | ||||||
7589 | if (!getLangOpts().CPlusPlus || ShadowingDecls.empty()) | ||||||
7590 | return; | ||||||
7591 | E = E->IgnoreParenImpCasts(); | ||||||
7592 | auto *DRE = dyn_cast<DeclRefExpr>(E); | ||||||
7593 | if (!DRE) | ||||||
7594 | return; | ||||||
7595 | const NamedDecl *D = cast<NamedDecl>(DRE->getDecl()->getCanonicalDecl()); | ||||||
7596 | auto I = ShadowingDecls.find(D); | ||||||
7597 | if (I == ShadowingDecls.end()) | ||||||
7598 | return; | ||||||
7599 | const NamedDecl *ShadowedDecl = I->second; | ||||||
7600 | const DeclContext *OldDC = ShadowedDecl->getDeclContext(); | ||||||
7601 | Diag(Loc, diag::warn_modifying_shadowing_decl) << D << OldDC; | ||||||
7602 | Diag(D->getLocation(), diag::note_var_declared_here) << D; | ||||||
7603 | Diag(ShadowedDecl->getLocation(), diag::note_previous_declaration); | ||||||
7604 | |||||||
7605 | // Avoid issuing multiple warnings about the same decl. | ||||||
7606 | ShadowingDecls.erase(I); | ||||||
7607 | } | ||||||
7608 | |||||||
7609 | /// Check for conflict between this global or extern "C" declaration and | ||||||
7610 | /// previous global or extern "C" declarations. This is only used in C++. | ||||||
7611 | template<typename T> | ||||||
7612 | static bool checkGlobalOrExternCConflict( | ||||||
7613 | Sema &S, const T *ND, bool IsGlobal, LookupResult &Previous) { | ||||||
7614 | assert(S.getLangOpts().CPlusPlus && "only C++ has extern \"C\"")((S.getLangOpts().CPlusPlus && "only C++ has extern \"C\"" ) ? static_cast<void> (0) : __assert_fail ("S.getLangOpts().CPlusPlus && \"only C++ has extern \\\"C\\\"\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 7614, __PRETTY_FUNCTION__)); | ||||||
7615 | NamedDecl *Prev = S.findLocallyScopedExternCDecl(ND->getDeclName()); | ||||||
7616 | |||||||
7617 | if (!Prev && IsGlobal && !isIncompleteDeclExternC(S, ND)) { | ||||||
7618 | // The common case: this global doesn't conflict with any extern "C" | ||||||
7619 | // declaration. | ||||||
7620 | return false; | ||||||
7621 | } | ||||||
7622 | |||||||
7623 | if (Prev) { | ||||||
7624 | if (!IsGlobal || isIncompleteDeclExternC(S, ND)) { | ||||||
7625 | // Both the old and new declarations have C language linkage. This is a | ||||||
7626 | // redeclaration. | ||||||
7627 | Previous.clear(); | ||||||
7628 | Previous.addDecl(Prev); | ||||||
7629 | return true; | ||||||
7630 | } | ||||||
7631 | |||||||
7632 | // This is a global, non-extern "C" declaration, and there is a previous | ||||||
7633 | // non-global extern "C" declaration. Diagnose if this is a variable | ||||||
7634 | // declaration. | ||||||
7635 | if (!isa<VarDecl>(ND)) | ||||||
7636 | return false; | ||||||
7637 | } else { | ||||||
7638 | // The declaration is extern "C". Check for any declaration in the | ||||||
7639 | // translation unit which might conflict. | ||||||
7640 | if (IsGlobal) { | ||||||
7641 | // We have already performed the lookup into the translation unit. | ||||||
7642 | IsGlobal = false; | ||||||
7643 | for (LookupResult::iterator I = Previous.begin(), E = Previous.end(); | ||||||
7644 | I != E; ++I) { | ||||||
7645 | if (isa<VarDecl>(*I)) { | ||||||
7646 | Prev = *I; | ||||||
7647 | break; | ||||||
7648 | } | ||||||
7649 | } | ||||||
7650 | } else { | ||||||
7651 | DeclContext::lookup_result R = | ||||||
7652 | S.Context.getTranslationUnitDecl()->lookup(ND->getDeclName()); | ||||||
7653 | for (DeclContext::lookup_result::iterator I = R.begin(), E = R.end(); | ||||||
7654 | I != E; ++I) { | ||||||
7655 | if (isa<VarDecl>(*I)) { | ||||||
7656 | Prev = *I; | ||||||
7657 | break; | ||||||
7658 | } | ||||||
7659 | // FIXME: If we have any other entity with this name in global scope, | ||||||
7660 | // the declaration is ill-formed, but that is a defect: it breaks the | ||||||
7661 | // 'stat' hack, for instance. Only variables can have mangled name | ||||||
7662 | // clashes with extern "C" declarations, so only they deserve a | ||||||
7663 | // diagnostic. | ||||||
7664 | } | ||||||
7665 | } | ||||||
7666 | |||||||
7667 | if (!Prev) | ||||||
7668 | return false; | ||||||
7669 | } | ||||||
7670 | |||||||
7671 | // Use the first declaration's location to ensure we point at something which | ||||||
7672 | // is lexically inside an extern "C" linkage-spec. | ||||||
7673 | assert(Prev && "should have found a previous declaration to diagnose")((Prev && "should have found a previous declaration to diagnose" ) ? static_cast<void> (0) : __assert_fail ("Prev && \"should have found a previous declaration to diagnose\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 7673, __PRETTY_FUNCTION__)); | ||||||
7674 | if (FunctionDecl *FD = dyn_cast<FunctionDecl>(Prev)) | ||||||
7675 | Prev = FD->getFirstDecl(); | ||||||
7676 | else | ||||||
7677 | Prev = cast<VarDecl>(Prev)->getFirstDecl(); | ||||||
7678 | |||||||
7679 | S.Diag(ND->getLocation(), diag::err_extern_c_global_conflict) | ||||||
7680 | << IsGlobal << ND; | ||||||
7681 | S.Diag(Prev->getLocation(), diag::note_extern_c_global_conflict) | ||||||
7682 | << IsGlobal; | ||||||
7683 | return false; | ||||||
7684 | } | ||||||
7685 | |||||||
7686 | /// Apply special rules for handling extern "C" declarations. Returns \c true | ||||||
7687 | /// if we have found that this is a redeclaration of some prior entity. | ||||||
7688 | /// | ||||||
7689 | /// Per C++ [dcl.link]p6: | ||||||
7690 | /// Two declarations [for a function or variable] with C language linkage | ||||||
7691 | /// with the same name that appear in different scopes refer to the same | ||||||
7692 | /// [entity]. An entity with C language linkage shall not be declared with | ||||||
7693 | /// the same name as an entity in global scope. | ||||||
7694 | template<typename T> | ||||||
7695 | static bool checkForConflictWithNonVisibleExternC(Sema &S, const T *ND, | ||||||
7696 | LookupResult &Previous) { | ||||||
7697 | if (!S.getLangOpts().CPlusPlus) { | ||||||
7698 | // In C, when declaring a global variable, look for a corresponding 'extern' | ||||||
7699 | // variable declared in function scope. We don't need this in C++, because | ||||||
7700 | // we find local extern decls in the surrounding file-scope DeclContext. | ||||||
7701 | if (ND->getDeclContext()->getRedeclContext()->isTranslationUnit()) { | ||||||
7702 | if (NamedDecl *Prev = S.findLocallyScopedExternCDecl(ND->getDeclName())) { | ||||||
7703 | Previous.clear(); | ||||||
7704 | Previous.addDecl(Prev); | ||||||
7705 | return true; | ||||||
7706 | } | ||||||
7707 | } | ||||||
7708 | return false; | ||||||
7709 | } | ||||||
7710 | |||||||
7711 | // A declaration in the translation unit can conflict with an extern "C" | ||||||
7712 | // declaration. | ||||||
7713 | if (ND->getDeclContext()->getRedeclContext()->isTranslationUnit()) | ||||||
7714 | return checkGlobalOrExternCConflict(S, ND, /*IsGlobal*/true, Previous); | ||||||
7715 | |||||||
7716 | // An extern "C" declaration can conflict with a declaration in the | ||||||
7717 | // translation unit or can be a redeclaration of an extern "C" declaration | ||||||
7718 | // in another scope. | ||||||
7719 | if (isIncompleteDeclExternC(S,ND)) | ||||||
7720 | return checkGlobalOrExternCConflict(S, ND, /*IsGlobal*/false, Previous); | ||||||
7721 | |||||||
7722 | // Neither global nor extern "C": nothing to do. | ||||||
7723 | return false; | ||||||
7724 | } | ||||||
7725 | |||||||
7726 | void Sema::CheckVariableDeclarationType(VarDecl *NewVD) { | ||||||
7727 | // If the decl is already known invalid, don't check it. | ||||||
7728 | if (NewVD->isInvalidDecl()) | ||||||
7729 | return; | ||||||
7730 | |||||||
7731 | QualType T = NewVD->getType(); | ||||||
7732 | |||||||
7733 | // Defer checking an 'auto' type until its initializer is attached. | ||||||
7734 | if (T->isUndeducedType()) | ||||||
7735 | return; | ||||||
7736 | |||||||
7737 | if (NewVD->hasAttrs()) | ||||||
7738 | CheckAlignasUnderalignment(NewVD); | ||||||
7739 | |||||||
7740 | if (T->isObjCObjectType()) { | ||||||
7741 | Diag(NewVD->getLocation(), diag::err_statically_allocated_object) | ||||||
7742 | << FixItHint::CreateInsertion(NewVD->getLocation(), "*"); | ||||||
7743 | T = Context.getObjCObjectPointerType(T); | ||||||
7744 | NewVD->setType(T); | ||||||
7745 | } | ||||||
7746 | |||||||
7747 | // Emit an error if an address space was applied to decl with local storage. | ||||||
7748 | // This includes arrays of objects with address space qualifiers, but not | ||||||
7749 | // automatic variables that point to other address spaces. | ||||||
7750 | // ISO/IEC TR 18037 S5.1.2 | ||||||
7751 | if (!getLangOpts().OpenCL && NewVD->hasLocalStorage() && | ||||||
7752 | T.getAddressSpace() != LangAS::Default) { | ||||||
7753 | Diag(NewVD->getLocation(), diag::err_as_qualified_auto_decl) << 0; | ||||||
7754 | NewVD->setInvalidDecl(); | ||||||
7755 | return; | ||||||
7756 | } | ||||||
7757 | |||||||
7758 | // OpenCL v1.2 s6.8 - The static qualifier is valid only in program | ||||||
7759 | // scope. | ||||||
7760 | if (getLangOpts().OpenCLVersion == 120 && | ||||||
7761 | !getOpenCLOptions().isEnabled("cl_clang_storage_class_specifiers") && | ||||||
7762 | NewVD->isStaticLocal()) { | ||||||
7763 | Diag(NewVD->getLocation(), diag::err_static_function_scope); | ||||||
7764 | NewVD->setInvalidDecl(); | ||||||
7765 | return; | ||||||
7766 | } | ||||||
7767 | |||||||
7768 | if (getLangOpts().OpenCL) { | ||||||
7769 | // OpenCL v2.0 s6.12.5 - The __block storage type is not supported. | ||||||
7770 | if (NewVD->hasAttr<BlocksAttr>()) { | ||||||
7771 | Diag(NewVD->getLocation(), diag::err_opencl_block_storage_type); | ||||||
7772 | return; | ||||||
7773 | } | ||||||
7774 | |||||||
7775 | if (T->isBlockPointerType()) { | ||||||
7776 | // OpenCL v2.0 s6.12.5 - Any block declaration must be const qualified and | ||||||
7777 | // can't use 'extern' storage class. | ||||||
7778 | if (!T.isConstQualified()) { | ||||||
7779 | Diag(NewVD->getLocation(), diag::err_opencl_invalid_block_declaration) | ||||||
7780 | << 0 /*const*/; | ||||||
7781 | NewVD->setInvalidDecl(); | ||||||
7782 | return; | ||||||
7783 | } | ||||||
7784 | if (NewVD->hasExternalStorage()) { | ||||||
7785 | Diag(NewVD->getLocation(), diag::err_opencl_extern_block_declaration); | ||||||
7786 | NewVD->setInvalidDecl(); | ||||||
7787 | return; | ||||||
7788 | } | ||||||
7789 | } | ||||||
7790 | // OpenCL C v1.2 s6.5 - All program scope variables must be declared in the | ||||||
7791 | // __constant address space. | ||||||
7792 | // OpenCL C v2.0 s6.5.1 - Variables defined at program scope and static | ||||||
7793 | // variables inside a function can also be declared in the global | ||||||
7794 | // address space. | ||||||
7795 | // C++ for OpenCL inherits rule from OpenCL C v2.0. | ||||||
7796 | // FIXME: Adding local AS in C++ for OpenCL might make sense. | ||||||
7797 | if (NewVD->isFileVarDecl() || NewVD->isStaticLocal() || | ||||||
7798 | NewVD->hasExternalStorage()) { | ||||||
7799 | if (!T->isSamplerT() && | ||||||
7800 | !(T.getAddressSpace() == LangAS::opencl_constant || | ||||||
7801 | (T.getAddressSpace() == LangAS::opencl_global && | ||||||
7802 | (getLangOpts().OpenCLVersion == 200 || | ||||||
7803 | getLangOpts().OpenCLCPlusPlus)))) { | ||||||
7804 | int Scope = NewVD->isStaticLocal() | NewVD->hasExternalStorage() << 1; | ||||||
7805 | if (getLangOpts().OpenCLVersion == 200 || getLangOpts().OpenCLCPlusPlus) | ||||||
7806 | Diag(NewVD->getLocation(), diag::err_opencl_global_invalid_addr_space) | ||||||
7807 | << Scope << "global or constant"; | ||||||
7808 | else | ||||||
7809 | Diag(NewVD->getLocation(), diag::err_opencl_global_invalid_addr_space) | ||||||
7810 | << Scope << "constant"; | ||||||
7811 | NewVD->setInvalidDecl(); | ||||||
7812 | return; | ||||||
7813 | } | ||||||
7814 | } else { | ||||||
7815 | if (T.getAddressSpace() == LangAS::opencl_global) { | ||||||
7816 | Diag(NewVD->getLocation(), diag::err_opencl_function_variable) | ||||||
7817 | << 1 /*is any function*/ << "global"; | ||||||
7818 | NewVD->setInvalidDecl(); | ||||||
7819 | return; | ||||||
7820 | } | ||||||
7821 | if (T.getAddressSpace() == LangAS::opencl_constant || | ||||||
7822 | T.getAddressSpace() == LangAS::opencl_local) { | ||||||
7823 | FunctionDecl *FD = getCurFunctionDecl(); | ||||||
7824 | // OpenCL v1.1 s6.5.2 and s6.5.3: no local or constant variables | ||||||
7825 | // in functions. | ||||||
7826 | if (FD && !FD->hasAttr<OpenCLKernelAttr>()) { | ||||||
7827 | if (T.getAddressSpace() == LangAS::opencl_constant) | ||||||
7828 | Diag(NewVD->getLocation(), diag::err_opencl_function_variable) | ||||||
7829 | << 0 /*non-kernel only*/ << "constant"; | ||||||
7830 | else | ||||||
7831 | Diag(NewVD->getLocation(), diag::err_opencl_function_variable) | ||||||
7832 | << 0 /*non-kernel only*/ << "local"; | ||||||
7833 | NewVD->setInvalidDecl(); | ||||||
7834 | return; | ||||||
7835 | } | ||||||
7836 | // OpenCL v2.0 s6.5.2 and s6.5.3: local and constant variables must be | ||||||
7837 | // in the outermost scope of a kernel function. | ||||||
7838 | if (FD && FD->hasAttr<OpenCLKernelAttr>()) { | ||||||
7839 | if (!getCurScope()->isFunctionScope()) { | ||||||
7840 | if (T.getAddressSpace() == LangAS::opencl_constant) | ||||||
7841 | Diag(NewVD->getLocation(), diag::err_opencl_addrspace_scope) | ||||||
7842 | << "constant"; | ||||||
7843 | else | ||||||
7844 | Diag(NewVD->getLocation(), diag::err_opencl_addrspace_scope) | ||||||
7845 | << "local"; | ||||||
7846 | NewVD->setInvalidDecl(); | ||||||
7847 | return; | ||||||
7848 | } | ||||||
7849 | } | ||||||
7850 | } else if (T.getAddressSpace() != LangAS::opencl_private && | ||||||
7851 | // If we are parsing a template we didn't deduce an addr | ||||||
7852 | // space yet. | ||||||
7853 | T.getAddressSpace() != LangAS::Default) { | ||||||
7854 | // Do not allow other address spaces on automatic variable. | ||||||
7855 | Diag(NewVD->getLocation(), diag::err_as_qualified_auto_decl) << 1; | ||||||
7856 | NewVD->setInvalidDecl(); | ||||||
7857 | return; | ||||||
7858 | } | ||||||
7859 | } | ||||||
7860 | } | ||||||
7861 | |||||||
7862 | if (NewVD->hasLocalStorage() && T.isObjCGCWeak() | ||||||
7863 | && !NewVD->hasAttr<BlocksAttr>()) { | ||||||
7864 | if (getLangOpts().getGC() != LangOptions::NonGC) | ||||||
7865 | Diag(NewVD->getLocation(), diag::warn_gc_attribute_weak_on_local); | ||||||
7866 | else { | ||||||
7867 | assert(!getLangOpts().ObjCAutoRefCount)((!getLangOpts().ObjCAutoRefCount) ? static_cast<void> ( 0) : __assert_fail ("!getLangOpts().ObjCAutoRefCount", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 7867, __PRETTY_FUNCTION__)); | ||||||
7868 | Diag(NewVD->getLocation(), diag::warn_attribute_weak_on_local); | ||||||
7869 | } | ||||||
7870 | } | ||||||
7871 | |||||||
7872 | bool isVM = T->isVariablyModifiedType(); | ||||||
7873 | if (isVM || NewVD->hasAttr<CleanupAttr>() || | ||||||
7874 | NewVD->hasAttr<BlocksAttr>()) | ||||||
7875 | setFunctionHasBranchProtectedScope(); | ||||||
7876 | |||||||
7877 | if ((isVM && NewVD->hasLinkage()) || | ||||||
7878 | (T->isVariableArrayType() && NewVD->hasGlobalStorage())) { | ||||||
7879 | bool SizeIsNegative; | ||||||
7880 | llvm::APSInt Oversized; | ||||||
7881 | TypeSourceInfo *FixedTInfo = TryToFixInvalidVariablyModifiedTypeSourceInfo( | ||||||
7882 | NewVD->getTypeSourceInfo(), Context, SizeIsNegative, Oversized); | ||||||
7883 | QualType FixedT; | ||||||
7884 | if (FixedTInfo && T == NewVD->getTypeSourceInfo()->getType()) | ||||||
7885 | FixedT = FixedTInfo->getType(); | ||||||
7886 | else if (FixedTInfo) { | ||||||
7887 | // Type and type-as-written are canonically different. We need to fix up | ||||||
7888 | // both types separately. | ||||||
7889 | FixedT = TryToFixInvalidVariablyModifiedType(T, Context, SizeIsNegative, | ||||||
7890 | Oversized); | ||||||
7891 | } | ||||||
7892 | if ((!FixedTInfo || FixedT.isNull()) && T->isVariableArrayType()) { | ||||||
7893 | const VariableArrayType *VAT = Context.getAsVariableArrayType(T); | ||||||
7894 | // FIXME: This won't give the correct result for | ||||||
7895 | // int a[10][n]; | ||||||
7896 | SourceRange SizeRange = VAT->getSizeExpr()->getSourceRange(); | ||||||
7897 | |||||||
7898 | if (NewVD->isFileVarDecl()) | ||||||
7899 | Diag(NewVD->getLocation(), diag::err_vla_decl_in_file_scope) | ||||||
7900 | << SizeRange; | ||||||
7901 | else if (NewVD->isStaticLocal()) | ||||||
7902 | Diag(NewVD->getLocation(), diag::err_vla_decl_has_static_storage) | ||||||
7903 | << SizeRange; | ||||||
7904 | else | ||||||
7905 | Diag(NewVD->getLocation(), diag::err_vla_decl_has_extern_linkage) | ||||||
7906 | << SizeRange; | ||||||
7907 | NewVD->setInvalidDecl(); | ||||||
7908 | return; | ||||||
7909 | } | ||||||
7910 | |||||||
7911 | if (!FixedTInfo) { | ||||||
7912 | if (NewVD->isFileVarDecl()) | ||||||
7913 | Diag(NewVD->getLocation(), diag::err_vm_decl_in_file_scope); | ||||||
7914 | else | ||||||
7915 | Diag(NewVD->getLocation(), diag::err_vm_decl_has_extern_linkage); | ||||||
7916 | NewVD->setInvalidDecl(); | ||||||
7917 | return; | ||||||
7918 | } | ||||||
7919 | |||||||
7920 | Diag(NewVD->getLocation(), diag::warn_illegal_constant_array_size); | ||||||
7921 | NewVD->setType(FixedT); | ||||||
7922 | NewVD->setTypeSourceInfo(FixedTInfo); | ||||||
7923 | } | ||||||
7924 | |||||||
7925 | if (T->isVoidType()) { | ||||||
7926 | // C++98 [dcl.stc]p5: The extern specifier can be applied only to the names | ||||||
7927 | // of objects and functions. | ||||||
7928 | if (NewVD->isThisDeclarationADefinition() || getLangOpts().CPlusPlus) { | ||||||
7929 | Diag(NewVD->getLocation(), diag::err_typecheck_decl_incomplete_type) | ||||||
7930 | << T; | ||||||
7931 | NewVD->setInvalidDecl(); | ||||||
7932 | return; | ||||||
7933 | } | ||||||
7934 | } | ||||||
7935 | |||||||
7936 | if (!NewVD->hasLocalStorage() && NewVD->hasAttr<BlocksAttr>()) { | ||||||
7937 | Diag(NewVD->getLocation(), diag::err_block_on_nonlocal); | ||||||
7938 | NewVD->setInvalidDecl(); | ||||||
7939 | return; | ||||||
7940 | } | ||||||
7941 | |||||||
7942 | if (isVM && NewVD->hasAttr<BlocksAttr>()) { | ||||||
7943 | Diag(NewVD->getLocation(), diag::err_block_on_vm); | ||||||
7944 | NewVD->setInvalidDecl(); | ||||||
7945 | return; | ||||||
7946 | } | ||||||
7947 | |||||||
7948 | if (NewVD->isConstexpr() && !T->isDependentType() && | ||||||
7949 | RequireLiteralType(NewVD->getLocation(), T, | ||||||
7950 | diag::err_constexpr_var_non_literal)) { | ||||||
7951 | NewVD->setInvalidDecl(); | ||||||
7952 | return; | ||||||
7953 | } | ||||||
7954 | } | ||||||
7955 | |||||||
7956 | /// Perform semantic checking on a newly-created variable | ||||||
7957 | /// declaration. | ||||||
7958 | /// | ||||||
7959 | /// This routine performs all of the type-checking required for a | ||||||
7960 | /// variable declaration once it has been built. It is used both to | ||||||
7961 | /// check variables after they have been parsed and their declarators | ||||||
7962 | /// have been translated into a declaration, and to check variables | ||||||
7963 | /// that have been instantiated from a template. | ||||||
7964 | /// | ||||||
7965 | /// Sets NewVD->isInvalidDecl() if an error was encountered. | ||||||
7966 | /// | ||||||
7967 | /// Returns true if the variable declaration is a redeclaration. | ||||||
7968 | bool Sema::CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous) { | ||||||
7969 | CheckVariableDeclarationType(NewVD); | ||||||
7970 | |||||||
7971 | // If the decl is already known invalid, don't check it. | ||||||
7972 | if (NewVD->isInvalidDecl()) | ||||||
7973 | return false; | ||||||
7974 | |||||||
7975 | // If we did not find anything by this name, look for a non-visible | ||||||
7976 | // extern "C" declaration with the same name. | ||||||
7977 | if (Previous.empty() && | ||||||
7978 | checkForConflictWithNonVisibleExternC(*this, NewVD, Previous)) | ||||||
7979 | Previous.setShadowed(); | ||||||
7980 | |||||||
7981 | if (!Previous.empty()) { | ||||||
7982 | MergeVarDecl(NewVD, Previous); | ||||||
7983 | return true; | ||||||
7984 | } | ||||||
7985 | return false; | ||||||
7986 | } | ||||||
7987 | |||||||
7988 | namespace { | ||||||
7989 | struct FindOverriddenMethod { | ||||||
7990 | Sema *S; | ||||||
7991 | CXXMethodDecl *Method; | ||||||
7992 | |||||||
7993 | /// Member lookup function that determines whether a given C++ | ||||||
7994 | /// method overrides a method in a base class, to be used with | ||||||
7995 | /// CXXRecordDecl::lookupInBases(). | ||||||
7996 | bool operator()(const CXXBaseSpecifier *Specifier, CXXBasePath &Path) { | ||||||
7997 | RecordDecl *BaseRecord = | ||||||
7998 | Specifier->getType()->castAs<RecordType>()->getDecl(); | ||||||
7999 | |||||||
8000 | DeclarationName Name = Method->getDeclName(); | ||||||
8001 | |||||||
8002 | // FIXME: Do we care about other names here too? | ||||||
8003 | if (Name.getNameKind() == DeclarationName::CXXDestructorName) { | ||||||
8004 | // We really want to find the base class destructor here. | ||||||
8005 | QualType T = S->Context.getTypeDeclType(BaseRecord); | ||||||
8006 | CanQualType CT = S->Context.getCanonicalType(T); | ||||||
8007 | |||||||
8008 | Name = S->Context.DeclarationNames.getCXXDestructorName(CT); | ||||||
8009 | } | ||||||
8010 | |||||||
8011 | for (Path.Decls = BaseRecord->lookup(Name); !Path.Decls.empty(); | ||||||
8012 | Path.Decls = Path.Decls.slice(1)) { | ||||||
8013 | NamedDecl *D = Path.Decls.front(); | ||||||
8014 | if (CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(D)) { | ||||||
8015 | if (MD->isVirtual() && | ||||||
8016 | !S->IsOverload( | ||||||
8017 | Method, MD, /*UseMemberUsingDeclRules=*/false, | ||||||
8018 | /*ConsiderCudaAttrs=*/true, | ||||||
8019 | // C++2a [class.virtual]p2 does not consider requires clauses | ||||||
8020 | // when overriding. | ||||||
8021 | /*ConsiderRequiresClauses=*/false)) | ||||||
8022 | return true; | ||||||
8023 | } | ||||||
8024 | } | ||||||
8025 | |||||||
8026 | return false; | ||||||
8027 | } | ||||||
8028 | }; | ||||||
8029 | |||||||
8030 | enum OverrideErrorKind { OEK_All, OEK_NonDeleted, OEK_Deleted }; | ||||||
8031 | } // end anonymous namespace | ||||||
8032 | |||||||
8033 | /// Report an error regarding overriding, along with any relevant | ||||||
8034 | /// overridden methods. | ||||||
8035 | /// | ||||||
8036 | /// \param DiagID the primary error to report. | ||||||
8037 | /// \param MD the overriding method. | ||||||
8038 | /// \param OEK which overrides to include as notes. | ||||||
8039 | static void ReportOverrides(Sema& S, unsigned DiagID, const CXXMethodDecl *MD, | ||||||
8040 | OverrideErrorKind OEK = OEK_All) { | ||||||
8041 | S.Diag(MD->getLocation(), DiagID) << MD->getDeclName(); | ||||||
8042 | for (const CXXMethodDecl *O : MD->overridden_methods()) { | ||||||
8043 | // This check (& the OEK parameter) could be replaced by a predicate, but | ||||||
8044 | // without lambdas that would be overkill. This is still nicer than writing | ||||||
8045 | // out the diag loop 3 times. | ||||||
8046 | if ((OEK == OEK_All) || | ||||||
8047 | (OEK == OEK_NonDeleted && !O->isDeleted()) || | ||||||
8048 | (OEK == OEK_Deleted && O->isDeleted())) | ||||||
8049 | S.Diag(O->getLocation(), diag::note_overridden_virtual_function); | ||||||
8050 | } | ||||||
8051 | } | ||||||
8052 | |||||||
8053 | /// AddOverriddenMethods - See if a method overrides any in the base classes, | ||||||
8054 | /// and if so, check that it's a valid override and remember it. | ||||||
8055 | bool Sema::AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD) { | ||||||
8056 | // Look for methods in base classes that this method might override. | ||||||
8057 | CXXBasePaths Paths; | ||||||
8058 | FindOverriddenMethod FOM; | ||||||
8059 | FOM.Method = MD; | ||||||
8060 | FOM.S = this; | ||||||
8061 | bool hasDeletedOverridenMethods = false; | ||||||
8062 | bool hasNonDeletedOverridenMethods = false; | ||||||
8063 | bool AddedAny = false; | ||||||
8064 | if (DC->lookupInBases(FOM, Paths)) { | ||||||
8065 | for (auto *I : Paths.found_decls()) { | ||||||
8066 | if (CXXMethodDecl *OldMD = dyn_cast<CXXMethodDecl>(I)) { | ||||||
8067 | MD->addOverriddenMethod(OldMD->getCanonicalDecl()); | ||||||
8068 | if (!CheckOverridingFunctionReturnType(MD, OldMD) && | ||||||
8069 | !CheckOverridingFunctionAttributes(MD, OldMD) && | ||||||
8070 | !CheckOverridingFunctionExceptionSpec(MD, OldMD) && | ||||||
8071 | !CheckIfOverriddenFunctionIsMarkedFinal(MD, OldMD)) { | ||||||
8072 | hasDeletedOverridenMethods |= OldMD->isDeleted(); | ||||||
8073 | hasNonDeletedOverridenMethods |= !OldMD->isDeleted(); | ||||||
8074 | AddedAny = true; | ||||||
8075 | } | ||||||
8076 | } | ||||||
8077 | } | ||||||
8078 | } | ||||||
8079 | |||||||
8080 | if (hasDeletedOverridenMethods && !MD->isDeleted()) { | ||||||
8081 | ReportOverrides(*this, diag::err_non_deleted_override, MD, OEK_Deleted); | ||||||
8082 | } | ||||||
8083 | if (hasNonDeletedOverridenMethods && MD->isDeleted()) { | ||||||
8084 | ReportOverrides(*this, diag::err_deleted_override, MD, OEK_NonDeleted); | ||||||
8085 | } | ||||||
8086 | |||||||
8087 | return AddedAny; | ||||||
8088 | } | ||||||
8089 | |||||||
8090 | namespace { | ||||||
8091 | // Struct for holding all of the extra arguments needed by | ||||||
8092 | // DiagnoseInvalidRedeclaration to call Sema::ActOnFunctionDeclarator. | ||||||
8093 | struct ActOnFDArgs { | ||||||
8094 | Scope *S; | ||||||
8095 | Declarator &D; | ||||||
8096 | MultiTemplateParamsArg TemplateParamLists; | ||||||
8097 | bool AddToScope; | ||||||
8098 | }; | ||||||
8099 | } // end anonymous namespace | ||||||
8100 | |||||||
8101 | namespace { | ||||||
8102 | |||||||
8103 | // Callback to only accept typo corrections that have a non-zero edit distance. | ||||||
8104 | // Also only accept corrections that have the same parent decl. | ||||||
8105 | class DifferentNameValidatorCCC final : public CorrectionCandidateCallback { | ||||||
8106 | public: | ||||||
8107 | DifferentNameValidatorCCC(ASTContext &Context, FunctionDecl *TypoFD, | ||||||
8108 | CXXRecordDecl *Parent) | ||||||
8109 | : Context(Context), OriginalFD(TypoFD), | ||||||
8110 | ExpectedParent(Parent ? Parent->getCanonicalDecl() : nullptr) {} | ||||||
8111 | |||||||
8112 | bool ValidateCandidate(const TypoCorrection &candidate) override { | ||||||
8113 | if (candidate.getEditDistance() == 0) | ||||||
8114 | return false; | ||||||
8115 | |||||||
8116 | SmallVector<unsigned, 1> MismatchedParams; | ||||||
8117 | for (TypoCorrection::const_decl_iterator CDecl = candidate.begin(), | ||||||
8118 | CDeclEnd = candidate.end(); | ||||||
8119 | CDecl != CDeclEnd; ++CDecl) { | ||||||
8120 | FunctionDecl *FD = dyn_cast<FunctionDecl>(*CDecl); | ||||||
8121 | |||||||
8122 | if (FD && !FD->hasBody() && | ||||||
8123 | hasSimilarParameters(Context, FD, OriginalFD, MismatchedParams)) { | ||||||
8124 | if (CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { | ||||||
8125 | CXXRecordDecl *Parent = MD->getParent(); | ||||||
8126 | if (Parent && Parent->getCanonicalDecl() == ExpectedParent) | ||||||
8127 | return true; | ||||||
8128 | } else if (!ExpectedParent) { | ||||||
8129 | return true; | ||||||
8130 | } | ||||||
8131 | } | ||||||
8132 | } | ||||||
8133 | |||||||
8134 | return false; | ||||||
8135 | } | ||||||
8136 | |||||||
8137 | std::unique_ptr<CorrectionCandidateCallback> clone() override { | ||||||
8138 | return std::make_unique<DifferentNameValidatorCCC>(*this); | ||||||
8139 | } | ||||||
8140 | |||||||
8141 | private: | ||||||
8142 | ASTContext &Context; | ||||||
8143 | FunctionDecl *OriginalFD; | ||||||
8144 | CXXRecordDecl *ExpectedParent; | ||||||
8145 | }; | ||||||
8146 | |||||||
8147 | } // end anonymous namespace | ||||||
8148 | |||||||
8149 | void Sema::MarkTypoCorrectedFunctionDefinition(const NamedDecl *F) { | ||||||
8150 | TypoCorrectedFunctionDefinitions.insert(F); | ||||||
8151 | } | ||||||
8152 | |||||||
8153 | /// Generate diagnostics for an invalid function redeclaration. | ||||||
8154 | /// | ||||||
8155 | /// This routine handles generating the diagnostic messages for an invalid | ||||||
8156 | /// function redeclaration, including finding possible similar declarations | ||||||
8157 | /// or performing typo correction if there are no previous declarations with | ||||||
8158 | /// the same name. | ||||||
8159 | /// | ||||||
8160 | /// Returns a NamedDecl iff typo correction was performed and substituting in | ||||||
8161 | /// the new declaration name does not cause new errors. | ||||||
8162 | static NamedDecl *DiagnoseInvalidRedeclaration( | ||||||
8163 | Sema &SemaRef, LookupResult &Previous, FunctionDecl *NewFD, | ||||||
8164 | ActOnFDArgs &ExtraArgs, bool IsLocalFriend, Scope *S) { | ||||||
8165 | DeclarationName Name = NewFD->getDeclName(); | ||||||
8166 | DeclContext *NewDC = NewFD->getDeclContext(); | ||||||
8167 | SmallVector<unsigned, 1> MismatchedParams; | ||||||
8168 | SmallVector<std::pair<FunctionDecl *, unsigned>, 1> NearMatches; | ||||||
8169 | TypoCorrection Correction; | ||||||
8170 | bool IsDefinition = ExtraArgs.D.isFunctionDefinition(); | ||||||
8171 | unsigned DiagMsg = | ||||||
8172 | IsLocalFriend ? diag::err_no_matching_local_friend : | ||||||
8173 | NewFD->getFriendObjectKind() ? diag::err_qualified_friend_no_match : | ||||||
8174 | diag::err_member_decl_does_not_match; | ||||||
8175 | LookupResult Prev(SemaRef, Name, NewFD->getLocation(), | ||||||
8176 | IsLocalFriend ? Sema::LookupLocalFriendName | ||||||
8177 | : Sema::LookupOrdinaryName, | ||||||
8178 | Sema::ForVisibleRedeclaration); | ||||||
8179 | |||||||
8180 | NewFD->setInvalidDecl(); | ||||||
8181 | if (IsLocalFriend) | ||||||
8182 | SemaRef.LookupName(Prev, S); | ||||||
8183 | else | ||||||
8184 | SemaRef.LookupQualifiedName(Prev, NewDC); | ||||||
8185 | assert(!Prev.isAmbiguous() &&((!Prev.isAmbiguous() && "Cannot have an ambiguity in previous-declaration lookup" ) ? static_cast<void> (0) : __assert_fail ("!Prev.isAmbiguous() && \"Cannot have an ambiguity in previous-declaration lookup\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 8186, __PRETTY_FUNCTION__)) | ||||||
8186 | "Cannot have an ambiguity in previous-declaration lookup")((!Prev.isAmbiguous() && "Cannot have an ambiguity in previous-declaration lookup" ) ? static_cast<void> (0) : __assert_fail ("!Prev.isAmbiguous() && \"Cannot have an ambiguity in previous-declaration lookup\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 8186, __PRETTY_FUNCTION__)); | ||||||
8187 | CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(NewFD); | ||||||
8188 | DifferentNameValidatorCCC CCC(SemaRef.Context, NewFD, | ||||||
8189 | MD ? MD->getParent() : nullptr); | ||||||
8190 | if (!Prev.empty()) { | ||||||
8191 | for (LookupResult::iterator Func = Prev.begin(), FuncEnd = Prev.end(); | ||||||
8192 | Func != FuncEnd; ++Func) { | ||||||
8193 | FunctionDecl *FD = dyn_cast<FunctionDecl>(*Func); | ||||||
8194 | if (FD && | ||||||
8195 | hasSimilarParameters(SemaRef.Context, FD, NewFD, MismatchedParams)) { | ||||||
8196 | // Add 1 to the index so that 0 can mean the mismatch didn't | ||||||
8197 | // involve a parameter | ||||||
8198 | unsigned ParamNum = | ||||||
8199 | MismatchedParams.empty() ? 0 : MismatchedParams.front() + 1; | ||||||
8200 | NearMatches.push_back(std::make_pair(FD, ParamNum)); | ||||||
8201 | } | ||||||
8202 | } | ||||||
8203 | // If the qualified name lookup yielded nothing, try typo correction | ||||||
8204 | } else if ((Correction = SemaRef.CorrectTypo( | ||||||
8205 | Prev.getLookupNameInfo(), Prev.getLookupKind(), S, | ||||||
8206 | &ExtraArgs.D.getCXXScopeSpec(), CCC, Sema::CTK_ErrorRecovery, | ||||||
8207 | IsLocalFriend ? nullptr : NewDC))) { | ||||||
8208 | // Set up everything for the call to ActOnFunctionDeclarator | ||||||
8209 | ExtraArgs.D.SetIdentifier(Correction.getCorrectionAsIdentifierInfo(), | ||||||
8210 | ExtraArgs.D.getIdentifierLoc()); | ||||||
8211 | Previous.clear(); | ||||||
8212 | Previous.setLookupName(Correction.getCorrection()); | ||||||
8213 | for (TypoCorrection::decl_iterator CDecl = Correction.begin(), | ||||||
8214 | CDeclEnd = Correction.end(); | ||||||
8215 | CDecl != CDeclEnd; ++CDecl) { | ||||||
8216 | FunctionDecl *FD = dyn_cast<FunctionDecl>(*CDecl); | ||||||
8217 | if (FD && !FD->hasBody() && | ||||||
8218 | hasSimilarParameters(SemaRef.Context, FD, NewFD, MismatchedParams)) { | ||||||
8219 | Previous.addDecl(FD); | ||||||
8220 | } | ||||||
8221 | } | ||||||
8222 | bool wasRedeclaration = ExtraArgs.D.isRedeclaration(); | ||||||
8223 | |||||||
8224 | NamedDecl *Result; | ||||||
8225 | // Retry building the function declaration with the new previous | ||||||
8226 | // declarations, and with errors suppressed. | ||||||
8227 | { | ||||||
8228 | // Trap errors. | ||||||
8229 | Sema::SFINAETrap Trap(SemaRef); | ||||||
8230 | |||||||
8231 | // TODO: Refactor ActOnFunctionDeclarator so that we can call only the | ||||||
8232 | // pieces need to verify the typo-corrected C++ declaration and hopefully | ||||||
8233 | // eliminate the need for the parameter pack ExtraArgs. | ||||||
8234 | Result = SemaRef.ActOnFunctionDeclarator( | ||||||
8235 | ExtraArgs.S, ExtraArgs.D, | ||||||
8236 | Correction.getCorrectionDecl()->getDeclContext(), | ||||||
8237 | NewFD->getTypeSourceInfo(), Previous, ExtraArgs.TemplateParamLists, | ||||||
8238 | ExtraArgs.AddToScope); | ||||||
8239 | |||||||
8240 | if (Trap.hasErrorOccurred()) | ||||||
8241 | Result = nullptr; | ||||||
8242 | } | ||||||
8243 | |||||||
8244 | if (Result) { | ||||||
8245 | // Determine which correction we picked. | ||||||
8246 | Decl *Canonical = Result->getCanonicalDecl(); | ||||||
8247 | for (LookupResult::iterator I = Previous.begin(), E = Previous.end(); | ||||||
8248 | I != E; ++I) | ||||||
8249 | if ((*I)->getCanonicalDecl() == Canonical) | ||||||
8250 | Correction.setCorrectionDecl(*I); | ||||||
8251 | |||||||
8252 | // Let Sema know about the correction. | ||||||
8253 | SemaRef.MarkTypoCorrectedFunctionDefinition(Result); | ||||||
8254 | SemaRef.diagnoseTypo( | ||||||
8255 | Correction, | ||||||
8256 | SemaRef.PDiag(IsLocalFriend | ||||||
8257 | ? diag::err_no_matching_local_friend_suggest | ||||||
8258 | : diag::err_member_decl_does_not_match_suggest) | ||||||
8259 | << Name << NewDC << IsDefinition); | ||||||
8260 | return Result; | ||||||
8261 | } | ||||||
8262 | |||||||
8263 | // Pretend the typo correction never occurred | ||||||
8264 | ExtraArgs.D.SetIdentifier(Name.getAsIdentifierInfo(), | ||||||
8265 | ExtraArgs.D.getIdentifierLoc()); | ||||||
8266 | ExtraArgs.D.setRedeclaration(wasRedeclaration); | ||||||
8267 | Previous.clear(); | ||||||
8268 | Previous.setLookupName(Name); | ||||||
8269 | } | ||||||
8270 | |||||||
8271 | SemaRef.Diag(NewFD->getLocation(), DiagMsg) | ||||||
8272 | << Name << NewDC << IsDefinition << NewFD->getLocation(); | ||||||
8273 | |||||||
8274 | bool NewFDisConst = false; | ||||||
8275 | if (CXXMethodDecl *NewMD = dyn_cast<CXXMethodDecl>(NewFD)) | ||||||
8276 | NewFDisConst = NewMD->isConst(); | ||||||
8277 | |||||||
8278 | for (SmallVectorImpl<std::pair<FunctionDecl *, unsigned> >::iterator | ||||||
8279 | NearMatch = NearMatches.begin(), NearMatchEnd = NearMatches.end(); | ||||||
8280 | NearMatch != NearMatchEnd; ++NearMatch) { | ||||||
8281 | FunctionDecl *FD = NearMatch->first; | ||||||
8282 | CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD); | ||||||
8283 | bool FDisConst = MD && MD->isConst(); | ||||||
8284 | bool IsMember = MD || !IsLocalFriend; | ||||||
8285 | |||||||
8286 | // FIXME: These notes are poorly worded for the local friend case. | ||||||
8287 | if (unsigned Idx = NearMatch->second) { | ||||||
8288 | ParmVarDecl *FDParam = FD->getParamDecl(Idx-1); | ||||||
8289 | SourceLocation Loc = FDParam->getTypeSpecStartLoc(); | ||||||
8290 | if (Loc.isInvalid()) Loc = FD->getLocation(); | ||||||
8291 | SemaRef.Diag(Loc, IsMember ? diag::note_member_def_close_param_match | ||||||
8292 | : diag::note_local_decl_close_param_match) | ||||||
8293 | << Idx << FDParam->getType() | ||||||
8294 | << NewFD->getParamDecl(Idx - 1)->getType(); | ||||||
8295 | } else if (FDisConst != NewFDisConst) { | ||||||
8296 | SemaRef.Diag(FD->getLocation(), diag::note_member_def_close_const_match) | ||||||
8297 | << NewFDisConst << FD->getSourceRange().getEnd(); | ||||||
8298 | } else | ||||||
8299 | SemaRef.Diag(FD->getLocation(), | ||||||
8300 | IsMember ? diag::note_member_def_close_match | ||||||
8301 | : diag::note_local_decl_close_match); | ||||||
8302 | } | ||||||
8303 | return nullptr; | ||||||
8304 | } | ||||||
8305 | |||||||
8306 | static StorageClass getFunctionStorageClass(Sema &SemaRef, Declarator &D) { | ||||||
8307 | switch (D.getDeclSpec().getStorageClassSpec()) { | ||||||
8308 | default: llvm_unreachable("Unknown storage class!")::llvm::llvm_unreachable_internal("Unknown storage class!", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 8308); | ||||||
8309 | case DeclSpec::SCS_auto: | ||||||
8310 | case DeclSpec::SCS_register: | ||||||
8311 | case DeclSpec::SCS_mutable: | ||||||
8312 | SemaRef.Diag(D.getDeclSpec().getStorageClassSpecLoc(), | ||||||
8313 | diag::err_typecheck_sclass_func); | ||||||
8314 | D.getMutableDeclSpec().ClearStorageClassSpecs(); | ||||||
8315 | D.setInvalidType(); | ||||||
8316 | break; | ||||||
8317 | case DeclSpec::SCS_unspecified: break; | ||||||
8318 | case DeclSpec::SCS_extern: | ||||||
8319 | if (D.getDeclSpec().isExternInLinkageSpec()) | ||||||
8320 | return SC_None; | ||||||
8321 | return SC_Extern; | ||||||
8322 | case DeclSpec::SCS_static: { | ||||||
8323 | if (SemaRef.CurContext->getRedeclContext()->isFunctionOrMethod()) { | ||||||
8324 | // C99 6.7.1p5: | ||||||
8325 | // The declaration of an identifier for a function that has | ||||||
8326 | // block scope shall have no explicit storage-class specifier | ||||||
8327 | // other than extern | ||||||
8328 | // See also (C++ [dcl.stc]p4). | ||||||
8329 | SemaRef.Diag(D.getDeclSpec().getStorageClassSpecLoc(), | ||||||
8330 | diag::err_static_block_func); | ||||||
8331 | break; | ||||||
8332 | } else | ||||||
8333 | return SC_Static; | ||||||
8334 | } | ||||||
8335 | case DeclSpec::SCS_private_extern: return SC_PrivateExtern; | ||||||
8336 | } | ||||||
8337 | |||||||
8338 | // No explicit storage class has already been returned | ||||||
8339 | return SC_None; | ||||||
8340 | } | ||||||
8341 | |||||||
8342 | static FunctionDecl *CreateNewFunctionDecl(Sema &SemaRef, Declarator &D, | ||||||
8343 | DeclContext *DC, QualType &R, | ||||||
8344 | TypeSourceInfo *TInfo, | ||||||
8345 | StorageClass SC, | ||||||
8346 | bool &IsVirtualOkay) { | ||||||
8347 | DeclarationNameInfo NameInfo = SemaRef.GetNameForDeclarator(D); | ||||||
8348 | DeclarationName Name = NameInfo.getName(); | ||||||
8349 | |||||||
8350 | FunctionDecl *NewFD = nullptr; | ||||||
8351 | bool isInline = D.getDeclSpec().isInlineSpecified(); | ||||||
8352 | |||||||
8353 | if (!SemaRef.getLangOpts().CPlusPlus) { | ||||||
8354 | // Determine whether the function was written with a | ||||||
8355 | // prototype. This true when: | ||||||
8356 | // - there is a prototype in the declarator, or | ||||||
8357 | // - the type R of the function is some kind of typedef or other non- | ||||||
8358 | // attributed reference to a type name (which eventually refers to a | ||||||
8359 | // function type). | ||||||
8360 | bool HasPrototype = | ||||||
8361 | (D.isFunctionDeclarator() && D.getFunctionTypeInfo().hasPrototype) || | ||||||
8362 | (!R->getAsAdjusted<FunctionType>() && R->isFunctionProtoType()); | ||||||
8363 | |||||||
8364 | NewFD = FunctionDecl::Create(SemaRef.Context, DC, D.getBeginLoc(), NameInfo, | ||||||
8365 | R, TInfo, SC, isInline, HasPrototype, | ||||||
8366 | CSK_unspecified, | ||||||
8367 | /*TrailingRequiresClause=*/nullptr); | ||||||
8368 | if (D.isInvalidType()) | ||||||
8369 | NewFD->setInvalidDecl(); | ||||||
8370 | |||||||
8371 | return NewFD; | ||||||
8372 | } | ||||||
8373 | |||||||
8374 | ExplicitSpecifier ExplicitSpecifier = D.getDeclSpec().getExplicitSpecifier(); | ||||||
8375 | |||||||
8376 | ConstexprSpecKind ConstexprKind = D.getDeclSpec().getConstexprSpecifier(); | ||||||
8377 | if (ConstexprKind == CSK_constinit) { | ||||||
8378 | SemaRef.Diag(D.getDeclSpec().getConstexprSpecLoc(), | ||||||
8379 | diag::err_constexpr_wrong_decl_kind) | ||||||
8380 | << ConstexprKind; | ||||||
8381 | ConstexprKind = CSK_unspecified; | ||||||
8382 | D.getMutableDeclSpec().ClearConstexprSpec(); | ||||||
8383 | } | ||||||
8384 | Expr *TrailingRequiresClause = D.getTrailingRequiresClause(); | ||||||
8385 | |||||||
8386 | // Check that the return type is not an abstract class type. | ||||||
8387 | // For record types, this is done by the AbstractClassUsageDiagnoser once | ||||||
8388 | // the class has been completely parsed. | ||||||
8389 | if (!DC->isRecord() && | ||||||
8390 | SemaRef.RequireNonAbstractType( | ||||||
8391 | D.getIdentifierLoc(), R->castAs<FunctionType>()->getReturnType(), | ||||||
8392 | diag::err_abstract_type_in_decl, SemaRef.AbstractReturnType)) | ||||||
8393 | D.setInvalidType(); | ||||||
8394 | |||||||
8395 | if (Name.getNameKind() == DeclarationName::CXXConstructorName) { | ||||||
8396 | // This is a C++ constructor declaration. | ||||||
8397 | assert(DC->isRecord() &&((DC->isRecord() && "Constructors can only be declared in a member context" ) ? static_cast<void> (0) : __assert_fail ("DC->isRecord() && \"Constructors can only be declared in a member context\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 8398, __PRETTY_FUNCTION__)) | ||||||
8398 | "Constructors can only be declared in a member context")((DC->isRecord() && "Constructors can only be declared in a member context" ) ? static_cast<void> (0) : __assert_fail ("DC->isRecord() && \"Constructors can only be declared in a member context\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 8398, __PRETTY_FUNCTION__)); | ||||||
8399 | |||||||
8400 | R = SemaRef.CheckConstructorDeclarator(D, R, SC); | ||||||
8401 | return CXXConstructorDecl::Create( | ||||||
8402 | SemaRef.Context, cast<CXXRecordDecl>(DC), D.getBeginLoc(), NameInfo, R, | ||||||
8403 | TInfo, ExplicitSpecifier, isInline, | ||||||
8404 | /*isImplicitlyDeclared=*/false, ConstexprKind, InheritedConstructor(), | ||||||
8405 | TrailingRequiresClause); | ||||||
8406 | |||||||
8407 | } else if (Name.getNameKind() == DeclarationName::CXXDestructorName) { | ||||||
8408 | // This is a C++ destructor declaration. | ||||||
8409 | if (DC->isRecord()) { | ||||||
8410 | R = SemaRef.CheckDestructorDeclarator(D, R, SC); | ||||||
8411 | CXXRecordDecl *Record = cast<CXXRecordDecl>(DC); | ||||||
8412 | CXXDestructorDecl *NewDD = CXXDestructorDecl::Create( | ||||||
8413 | SemaRef.Context, Record, D.getBeginLoc(), NameInfo, R, TInfo, | ||||||
8414 | isInline, /*isImplicitlyDeclared=*/false, ConstexprKind, | ||||||
8415 | TrailingRequiresClause); | ||||||
8416 | |||||||
8417 | // If the destructor needs an implicit exception specification, set it | ||||||
8418 | // now. FIXME: It'd be nice to be able to create the right type to start | ||||||
8419 | // with, but the type needs to reference the destructor declaration. | ||||||
8420 | if (SemaRef.getLangOpts().CPlusPlus11) | ||||||
8421 | SemaRef.AdjustDestructorExceptionSpec(NewDD); | ||||||
8422 | |||||||
8423 | IsVirtualOkay = true; | ||||||
8424 | return NewDD; | ||||||
8425 | |||||||
8426 | } else { | ||||||
8427 | SemaRef.Diag(D.getIdentifierLoc(), diag::err_destructor_not_member); | ||||||
8428 | D.setInvalidType(); | ||||||
8429 | |||||||
8430 | // Create a FunctionDecl to satisfy the function definition parsing | ||||||
8431 | // code path. | ||||||
8432 | return FunctionDecl::Create(SemaRef.Context, DC, D.getBeginLoc(), | ||||||
8433 | D.getIdentifierLoc(), Name, R, TInfo, SC, | ||||||
8434 | isInline, | ||||||
8435 | /*hasPrototype=*/true, ConstexprKind, | ||||||
8436 | TrailingRequiresClause); | ||||||
8437 | } | ||||||
8438 | |||||||
8439 | } else if (Name.getNameKind() == DeclarationName::CXXConversionFunctionName) { | ||||||
8440 | if (!DC->isRecord()) { | ||||||
8441 | SemaRef.Diag(D.getIdentifierLoc(), | ||||||
8442 | diag::err_conv_function_not_member); | ||||||
8443 | return nullptr; | ||||||
8444 | } | ||||||
8445 | |||||||
8446 | SemaRef.CheckConversionDeclarator(D, R, SC); | ||||||
8447 | if (D.isInvalidType()) | ||||||
8448 | return nullptr; | ||||||
8449 | |||||||
8450 | IsVirtualOkay = true; | ||||||
8451 | return CXXConversionDecl::Create( | ||||||
8452 | SemaRef.Context, cast<CXXRecordDecl>(DC), D.getBeginLoc(), NameInfo, R, | ||||||
8453 | TInfo, isInline, ExplicitSpecifier, ConstexprKind, SourceLocation(), | ||||||
8454 | TrailingRequiresClause); | ||||||
8455 | |||||||
8456 | } else if (Name.getNameKind() == DeclarationName::CXXDeductionGuideName) { | ||||||
8457 | if (TrailingRequiresClause) | ||||||
8458 | SemaRef.Diag(TrailingRequiresClause->getBeginLoc(), | ||||||
8459 | diag::err_trailing_requires_clause_on_deduction_guide) | ||||||
8460 | << TrailingRequiresClause->getSourceRange(); | ||||||
8461 | SemaRef.CheckDeductionGuideDeclarator(D, R, SC); | ||||||
8462 | |||||||
8463 | return CXXDeductionGuideDecl::Create(SemaRef.Context, DC, D.getBeginLoc(), | ||||||
8464 | ExplicitSpecifier, NameInfo, R, TInfo, | ||||||
8465 | D.getEndLoc()); | ||||||
8466 | } else if (DC->isRecord()) { | ||||||
8467 | // If the name of the function is the same as the name of the record, | ||||||
8468 | // then this must be an invalid constructor that has a return type. | ||||||
8469 | // (The parser checks for a return type and makes the declarator a | ||||||
8470 | // constructor if it has no return type). | ||||||
8471 | if (Name.getAsIdentifierInfo() && | ||||||
8472 | Name.getAsIdentifierInfo() == cast<CXXRecordDecl>(DC)->getIdentifier()){ | ||||||
8473 | SemaRef.Diag(D.getIdentifierLoc(), diag::err_constructor_return_type) | ||||||
8474 | << SourceRange(D.getDeclSpec().getTypeSpecTypeLoc()) | ||||||
8475 | << SourceRange(D.getIdentifierLoc()); | ||||||
8476 | return nullptr; | ||||||
8477 | } | ||||||
8478 | |||||||
8479 | // This is a C++ method declaration. | ||||||
8480 | CXXMethodDecl *Ret = CXXMethodDecl::Create( | ||||||
8481 | SemaRef.Context, cast<CXXRecordDecl>(DC), D.getBeginLoc(), NameInfo, R, | ||||||
8482 | TInfo, SC, isInline, ConstexprKind, SourceLocation(), | ||||||
8483 | TrailingRequiresClause); | ||||||
8484 | IsVirtualOkay = !Ret->isStatic(); | ||||||
8485 | return Ret; | ||||||
8486 | } else { | ||||||
8487 | bool isFriend = | ||||||
8488 | SemaRef.getLangOpts().CPlusPlus && D.getDeclSpec().isFriendSpecified(); | ||||||
8489 | if (!isFriend && SemaRef.CurContext->isRecord()) | ||||||
8490 | return nullptr; | ||||||
8491 | |||||||
8492 | // Determine whether the function was written with a | ||||||
8493 | // prototype. This true when: | ||||||
8494 | // - we're in C++ (where every function has a prototype), | ||||||
8495 | return FunctionDecl::Create(SemaRef.Context, DC, D.getBeginLoc(), NameInfo, | ||||||
8496 | R, TInfo, SC, isInline, true /*HasPrototype*/, | ||||||
8497 | ConstexprKind, TrailingRequiresClause); | ||||||
8498 | } | ||||||
8499 | } | ||||||
8500 | |||||||
8501 | enum OpenCLParamType { | ||||||
8502 | ValidKernelParam, | ||||||
8503 | PtrPtrKernelParam, | ||||||
8504 | PtrKernelParam, | ||||||
8505 | InvalidAddrSpacePtrKernelParam, | ||||||
8506 | InvalidKernelParam, | ||||||
8507 | RecordKernelParam | ||||||
8508 | }; | ||||||
8509 | |||||||
8510 | static bool isOpenCLSizeDependentType(ASTContext &C, QualType Ty) { | ||||||
8511 | // Size dependent types are just typedefs to normal integer types | ||||||
8512 | // (e.g. unsigned long), so we cannot distinguish them from other typedefs to | ||||||
8513 | // integers other than by their names. | ||||||
8514 | StringRef SizeTypeNames[] = {"size_t", "intptr_t", "uintptr_t", "ptrdiff_t"}; | ||||||
8515 | |||||||
8516 | // Remove typedefs one by one until we reach a typedef | ||||||
8517 | // for a size dependent type. | ||||||
8518 | QualType DesugaredTy = Ty; | ||||||
8519 | do { | ||||||
8520 | ArrayRef<StringRef> Names(SizeTypeNames); | ||||||
8521 | auto Match = llvm::find(Names, DesugaredTy.getUnqualifiedType().getAsString()); | ||||||
8522 | if (Names.end() != Match) | ||||||
8523 | return true; | ||||||
8524 | |||||||
8525 | Ty = DesugaredTy; | ||||||
8526 | DesugaredTy = Ty.getSingleStepDesugaredType(C); | ||||||
8527 | } while (DesugaredTy != Ty); | ||||||
8528 | |||||||
8529 | return false; | ||||||
8530 | } | ||||||
8531 | |||||||
8532 | static OpenCLParamType getOpenCLKernelParameterType(Sema &S, QualType PT) { | ||||||
8533 | if (PT->isPointerType()) { | ||||||
8534 | QualType PointeeType = PT->getPointeeType(); | ||||||
8535 | if (PointeeType->isPointerType()) | ||||||
8536 | return PtrPtrKernelParam; | ||||||
8537 | if (PointeeType.getAddressSpace() == LangAS::opencl_generic || | ||||||
8538 | PointeeType.getAddressSpace() == LangAS::opencl_private || | ||||||
8539 | PointeeType.getAddressSpace() == LangAS::Default) | ||||||
8540 | return InvalidAddrSpacePtrKernelParam; | ||||||
8541 | return PtrKernelParam; | ||||||
8542 | } | ||||||
8543 | |||||||
8544 | // OpenCL v1.2 s6.9.k: | ||||||
8545 | // Arguments to kernel functions in a program cannot be declared with the | ||||||
8546 | // built-in scalar types bool, half, size_t, ptrdiff_t, intptr_t, and | ||||||
8547 | // uintptr_t or a struct and/or union that contain fields declared to be one | ||||||
8548 | // of these built-in scalar types. | ||||||
8549 | if (isOpenCLSizeDependentType(S.getASTContext(), PT)) | ||||||
8550 | return InvalidKernelParam; | ||||||
8551 | |||||||
8552 | if (PT->isImageType()) | ||||||
8553 | return PtrKernelParam; | ||||||
8554 | |||||||
8555 | if (PT->isBooleanType() || PT->isEventT() || PT->isReserveIDT()) | ||||||
8556 | return InvalidKernelParam; | ||||||
8557 | |||||||
8558 | // OpenCL extension spec v1.2 s9.5: | ||||||
8559 | // This extension adds support for half scalar and vector types as built-in | ||||||
8560 | // types that can be used for arithmetic operations, conversions etc. | ||||||
8561 | if (!S.getOpenCLOptions().isEnabled("cl_khr_fp16") && PT->isHalfType()) | ||||||
8562 | return InvalidKernelParam; | ||||||
8563 | |||||||
8564 | if (PT->isRecordType()) | ||||||
8565 | return RecordKernelParam; | ||||||
8566 | |||||||
8567 | // Look into an array argument to check if it has a forbidden type. | ||||||
8568 | if (PT->isArrayType()) { | ||||||
8569 | const Type *UnderlyingTy = PT->getPointeeOrArrayElementType(); | ||||||
8570 | // Call ourself to check an underlying type of an array. Since the | ||||||
8571 | // getPointeeOrArrayElementType returns an innermost type which is not an | ||||||
8572 | // array, this recursive call only happens once. | ||||||
8573 | return getOpenCLKernelParameterType(S, QualType(UnderlyingTy, 0)); | ||||||
8574 | } | ||||||
8575 | |||||||
8576 | return ValidKernelParam; | ||||||
8577 | } | ||||||
8578 | |||||||
8579 | static void checkIsValidOpenCLKernelParameter( | ||||||
8580 | Sema &S, | ||||||
8581 | Declarator &D, | ||||||
8582 | ParmVarDecl *Param, | ||||||
8583 | llvm::SmallPtrSetImpl<const Type *> &ValidTypes) { | ||||||
8584 | QualType PT = Param->getType(); | ||||||
8585 | |||||||
8586 | // Cache the valid types we encounter to avoid rechecking structs that are | ||||||
8587 | // used again | ||||||
8588 | if (ValidTypes.count(PT.getTypePtr())) | ||||||
8589 | return; | ||||||
8590 | |||||||
8591 | switch (getOpenCLKernelParameterType(S, PT)) { | ||||||
8592 | case PtrPtrKernelParam: | ||||||
8593 | // OpenCL v1.2 s6.9.a: | ||||||
8594 | // A kernel function argument cannot be declared as a | ||||||
8595 | // pointer to a pointer type. | ||||||
8596 | S.Diag(Param->getLocation(), diag::err_opencl_ptrptr_kernel_param); | ||||||
8597 | D.setInvalidType(); | ||||||
8598 | return; | ||||||
8599 | |||||||
8600 | case InvalidAddrSpacePtrKernelParam: | ||||||
8601 | // OpenCL v1.0 s6.5: | ||||||
8602 | // __kernel function arguments declared to be a pointer of a type can point | ||||||
8603 | // to one of the following address spaces only : __global, __local or | ||||||
8604 | // __constant. | ||||||
8605 | S.Diag(Param->getLocation(), diag::err_kernel_arg_address_space); | ||||||
8606 | D.setInvalidType(); | ||||||
8607 | return; | ||||||
8608 | |||||||
8609 | // OpenCL v1.2 s6.9.k: | ||||||
8610 | // Arguments to kernel functions in a program cannot be declared with the | ||||||
8611 | // built-in scalar types bool, half, size_t, ptrdiff_t, intptr_t, and | ||||||
8612 | // uintptr_t or a struct and/or union that contain fields declared to be | ||||||
8613 | // one of these built-in scalar types. | ||||||
8614 | |||||||
8615 | case InvalidKernelParam: | ||||||
8616 | // OpenCL v1.2 s6.8 n: | ||||||
8617 | // A kernel function argument cannot be declared | ||||||
8618 | // of event_t type. | ||||||
8619 | // Do not diagnose half type since it is diagnosed as invalid argument | ||||||
8620 | // type for any function elsewhere. | ||||||
8621 | if (!PT->isHalfType()) { | ||||||
8622 | S.Diag(Param->getLocation(), diag::err_bad_kernel_param_type) << PT; | ||||||
8623 | |||||||
8624 | // Explain what typedefs are involved. | ||||||
8625 | const TypedefType *Typedef = nullptr; | ||||||
8626 | while ((Typedef = PT->getAs<TypedefType>())) { | ||||||
8627 | SourceLocation Loc = Typedef->getDecl()->getLocation(); | ||||||
8628 | // SourceLocation may be invalid for a built-in type. | ||||||
8629 | if (Loc.isValid()) | ||||||
8630 | S.Diag(Loc, diag::note_entity_declared_at) << PT; | ||||||
8631 | PT = Typedef->desugar(); | ||||||
8632 | } | ||||||
8633 | } | ||||||
8634 | |||||||
8635 | D.setInvalidType(); | ||||||
8636 | return; | ||||||
8637 | |||||||
8638 | case PtrKernelParam: | ||||||
8639 | case ValidKernelParam: | ||||||
8640 | ValidTypes.insert(PT.getTypePtr()); | ||||||
8641 | return; | ||||||
8642 | |||||||
8643 | case RecordKernelParam: | ||||||
8644 | break; | ||||||
8645 | } | ||||||
8646 | |||||||
8647 | // Track nested structs we will inspect | ||||||
8648 | SmallVector<const Decl *, 4> VisitStack; | ||||||
8649 | |||||||
8650 | // Track where we are in the nested structs. Items will migrate from | ||||||
8651 | // VisitStack to HistoryStack as we do the DFS for bad field. | ||||||
8652 | SmallVector<const FieldDecl *, 4> HistoryStack; | ||||||
8653 | HistoryStack.push_back(nullptr); | ||||||
8654 | |||||||
8655 | // At this point we already handled everything except of a RecordType or | ||||||
8656 | // an ArrayType of a RecordType. | ||||||
8657 | assert((PT->isArrayType() || PT->isRecordType()) && "Unexpected type.")(((PT->isArrayType() || PT->isRecordType()) && "Unexpected type." ) ? static_cast<void> (0) : __assert_fail ("(PT->isArrayType() || PT->isRecordType()) && \"Unexpected type.\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 8657, __PRETTY_FUNCTION__)); | ||||||
8658 | const RecordType *RecTy = | ||||||
8659 | PT->getPointeeOrArrayElementType()->getAs<RecordType>(); | ||||||
8660 | const RecordDecl *OrigRecDecl = RecTy->getDecl(); | ||||||
8661 | |||||||
8662 | VisitStack.push_back(RecTy->getDecl()); | ||||||
8663 | assert(VisitStack.back() && "First decl null?")((VisitStack.back() && "First decl null?") ? static_cast <void> (0) : __assert_fail ("VisitStack.back() && \"First decl null?\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 8663, __PRETTY_FUNCTION__)); | ||||||
8664 | |||||||
8665 | do { | ||||||
8666 | const Decl *Next = VisitStack.pop_back_val(); | ||||||
8667 | if (!Next) { | ||||||
8668 | assert(!HistoryStack.empty())((!HistoryStack.empty()) ? static_cast<void> (0) : __assert_fail ("!HistoryStack.empty()", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 8668, __PRETTY_FUNCTION__)); | ||||||
8669 | // Found a marker, we have gone up a level | ||||||
8670 | if (const FieldDecl *Hist = HistoryStack.pop_back_val()) | ||||||
8671 | ValidTypes.insert(Hist->getType().getTypePtr()); | ||||||
8672 | |||||||
8673 | continue; | ||||||
8674 | } | ||||||
8675 | |||||||
8676 | // Adds everything except the original parameter declaration (which is not a | ||||||
8677 | // field itself) to the history stack. | ||||||
8678 | const RecordDecl *RD; | ||||||
8679 | if (const FieldDecl *Field = dyn_cast<FieldDecl>(Next)) { | ||||||
8680 | HistoryStack.push_back(Field); | ||||||
8681 | |||||||
8682 | QualType FieldTy = Field->getType(); | ||||||
8683 | // Other field types (known to be valid or invalid) are handled while we | ||||||
8684 | // walk around RecordDecl::fields(). | ||||||
8685 | assert((FieldTy->isArrayType() || FieldTy->isRecordType()) &&(((FieldTy->isArrayType() || FieldTy->isRecordType()) && "Unexpected type.") ? static_cast<void> (0) : __assert_fail ("(FieldTy->isArrayType() || FieldTy->isRecordType()) && \"Unexpected type.\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 8686, __PRETTY_FUNCTION__)) | ||||||
8686 | "Unexpected type.")(((FieldTy->isArrayType() || FieldTy->isRecordType()) && "Unexpected type.") ? static_cast<void> (0) : __assert_fail ("(FieldTy->isArrayType() || FieldTy->isRecordType()) && \"Unexpected type.\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 8686, __PRETTY_FUNCTION__)); | ||||||
8687 | const Type *FieldRecTy = FieldTy->getPointeeOrArrayElementType(); | ||||||
8688 | |||||||
8689 | RD = FieldRecTy->castAs<RecordType>()->getDecl(); | ||||||
8690 | } else { | ||||||
8691 | RD = cast<RecordDecl>(Next); | ||||||
8692 | } | ||||||
8693 | |||||||
8694 | // Add a null marker so we know when we've gone back up a level | ||||||
8695 | VisitStack.push_back(nullptr); | ||||||
8696 | |||||||
8697 | for (const auto *FD : RD->fields()) { | ||||||
8698 | QualType QT = FD->getType(); | ||||||
8699 | |||||||
8700 | if (ValidTypes.count(QT.getTypePtr())) | ||||||
8701 | continue; | ||||||
8702 | |||||||
8703 | OpenCLParamType ParamType = getOpenCLKernelParameterType(S, QT); | ||||||
8704 | if (ParamType == ValidKernelParam) | ||||||
8705 | continue; | ||||||
8706 | |||||||
8707 | if (ParamType == RecordKernelParam) { | ||||||
8708 | VisitStack.push_back(FD); | ||||||
8709 | continue; | ||||||
8710 | } | ||||||
8711 | |||||||
8712 | // OpenCL v1.2 s6.9.p: | ||||||
8713 | // Arguments to kernel functions that are declared to be a struct or union | ||||||
8714 | // do not allow OpenCL objects to be passed as elements of the struct or | ||||||
8715 | // union. | ||||||
8716 | if (ParamType == PtrKernelParam || ParamType == PtrPtrKernelParam || | ||||||
8717 | ParamType == InvalidAddrSpacePtrKernelParam) { | ||||||
8718 | S.Diag(Param->getLocation(), | ||||||
8719 | diag::err_record_with_pointers_kernel_param) | ||||||
8720 | << PT->isUnionType() | ||||||
8721 | << PT; | ||||||
8722 | } else { | ||||||
8723 | S.Diag(Param->getLocation(), diag::err_bad_kernel_param_type) << PT; | ||||||
8724 | } | ||||||
8725 | |||||||
8726 | S.Diag(OrigRecDecl->getLocation(), diag::note_within_field_of_type) | ||||||
8727 | << OrigRecDecl->getDeclName(); | ||||||
8728 | |||||||
8729 | // We have an error, now let's go back up through history and show where | ||||||
8730 | // the offending field came from | ||||||
8731 | for (ArrayRef<const FieldDecl *>::const_iterator | ||||||
8732 | I = HistoryStack.begin() + 1, | ||||||
8733 | E = HistoryStack.end(); | ||||||
8734 | I != E; ++I) { | ||||||
8735 | const FieldDecl *OuterField = *I; | ||||||
8736 | S.Diag(OuterField->getLocation(), diag::note_within_field_of_type) | ||||||
8737 | << OuterField->getType(); | ||||||
8738 | } | ||||||
8739 | |||||||
8740 | S.Diag(FD->getLocation(), diag::note_illegal_field_declared_here) | ||||||
8741 | << QT->isPointerType() | ||||||
8742 | << QT; | ||||||
8743 | D.setInvalidType(); | ||||||
8744 | return; | ||||||
8745 | } | ||||||
8746 | } while (!VisitStack.empty()); | ||||||
8747 | } | ||||||
8748 | |||||||
8749 | /// Find the DeclContext in which a tag is implicitly declared if we see an | ||||||
8750 | /// elaborated type specifier in the specified context, and lookup finds | ||||||
8751 | /// nothing. | ||||||
8752 | static DeclContext *getTagInjectionContext(DeclContext *DC) { | ||||||
8753 | while (!DC->isFileContext() && !DC->isFunctionOrMethod()) | ||||||
8754 | DC = DC->getParent(); | ||||||
8755 | return DC; | ||||||
8756 | } | ||||||
8757 | |||||||
8758 | /// Find the Scope in which a tag is implicitly declared if we see an | ||||||
8759 | /// elaborated type specifier in the specified context, and lookup finds | ||||||
8760 | /// nothing. | ||||||
8761 | static Scope *getTagInjectionScope(Scope *S, const LangOptions &LangOpts) { | ||||||
8762 | while (S->isClassScope() || | ||||||
8763 | (LangOpts.CPlusPlus && | ||||||
8764 | S->isFunctionPrototypeScope()) || | ||||||
8765 | ((S->getFlags() & Scope::DeclScope) == 0) || | ||||||
8766 | (S->getEntity() && S->getEntity()->isTransparentContext())) | ||||||
8767 | S = S->getParent(); | ||||||
8768 | return S; | ||||||
8769 | } | ||||||
8770 | |||||||
8771 | NamedDecl* | ||||||
8772 | Sema::ActOnFunctionDeclarator(Scope *S, Declarator &D, DeclContext *DC, | ||||||
8773 | TypeSourceInfo *TInfo, LookupResult &Previous, | ||||||
8774 | MultiTemplateParamsArg TemplateParamListsRef, | ||||||
8775 | bool &AddToScope) { | ||||||
8776 | QualType R = TInfo->getType(); | ||||||
8777 | |||||||
8778 | assert(R->isFunctionType())((R->isFunctionType()) ? static_cast<void> (0) : __assert_fail ("R->isFunctionType()", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 8778, __PRETTY_FUNCTION__)); | ||||||
8779 | SmallVector<TemplateParameterList *, 4> TemplateParamLists; | ||||||
8780 | for (TemplateParameterList *TPL : TemplateParamListsRef) | ||||||
8781 | TemplateParamLists.push_back(TPL); | ||||||
8782 | if (TemplateParameterList *Invented = D.getInventedTemplateParameterList()) { | ||||||
8783 | if (!TemplateParamLists.empty() && | ||||||
8784 | Invented->getDepth() == TemplateParamLists.back()->getDepth()) | ||||||
8785 | TemplateParamLists.back() = Invented; | ||||||
8786 | else | ||||||
8787 | TemplateParamLists.push_back(Invented); | ||||||
8788 | } | ||||||
8789 | |||||||
8790 | // TODO: consider using NameInfo for diagnostic. | ||||||
8791 | DeclarationNameInfo NameInfo = GetNameForDeclarator(D); | ||||||
8792 | DeclarationName Name = NameInfo.getName(); | ||||||
8793 | StorageClass SC = getFunctionStorageClass(*this, D); | ||||||
8794 | |||||||
8795 | if (DeclSpec::TSCS TSCS = D.getDeclSpec().getThreadStorageClassSpec()) | ||||||
8796 | Diag(D.getDeclSpec().getThreadStorageClassSpecLoc(), | ||||||
8797 | diag::err_invalid_thread) | ||||||
8798 | << DeclSpec::getSpecifierName(TSCS); | ||||||
8799 | |||||||
8800 | if (D.isFirstDeclarationOfMember()) | ||||||
8801 | adjustMemberFunctionCC(R, D.isStaticMember(), D.isCtorOrDtor(), | ||||||
8802 | D.getIdentifierLoc()); | ||||||
8803 | |||||||
8804 | bool isFriend = false; | ||||||
8805 | FunctionTemplateDecl *FunctionTemplate = nullptr; | ||||||
8806 | bool isMemberSpecialization = false; | ||||||
8807 | bool isFunctionTemplateSpecialization = false; | ||||||
8808 | |||||||
8809 | bool isDependentClassScopeExplicitSpecialization = false; | ||||||
8810 | bool HasExplicitTemplateArgs = false; | ||||||
8811 | TemplateArgumentListInfo TemplateArgs; | ||||||
8812 | |||||||
8813 | bool isVirtualOkay = false; | ||||||
8814 | |||||||
8815 | DeclContext *OriginalDC = DC; | ||||||
8816 | bool IsLocalExternDecl = adjustContextForLocalExternDecl(DC); | ||||||
8817 | |||||||
8818 | FunctionDecl *NewFD = CreateNewFunctionDecl(*this, D, DC, R, TInfo, SC, | ||||||
8819 | isVirtualOkay); | ||||||
8820 | if (!NewFD) return nullptr; | ||||||
8821 | |||||||
8822 | if (OriginalLexicalContext && OriginalLexicalContext->isObjCContainer()) | ||||||
8823 | NewFD->setTopLevelDeclInObjCContainer(); | ||||||
8824 | |||||||
8825 | // Set the lexical context. If this is a function-scope declaration, or has a | ||||||
8826 | // C++ scope specifier, or is the object of a friend declaration, the lexical | ||||||
8827 | // context will be different from the semantic context. | ||||||
8828 | NewFD->setLexicalDeclContext(CurContext); | ||||||
8829 | |||||||
8830 | if (IsLocalExternDecl) | ||||||
8831 | NewFD->setLocalExternDecl(); | ||||||
8832 | |||||||
8833 | if (getLangOpts().CPlusPlus) { | ||||||
8834 | bool isInline = D.getDeclSpec().isInlineSpecified(); | ||||||
8835 | bool isVirtual = D.getDeclSpec().isVirtualSpecified(); | ||||||
8836 | bool hasExplicit = D.getDeclSpec().hasExplicitSpecifier(); | ||||||
8837 | isFriend = D.getDeclSpec().isFriendSpecified(); | ||||||
8838 | if (isFriend && !isInline && D.isFunctionDefinition()) { | ||||||
8839 | // C++ [class.friend]p5 | ||||||
8840 | // A function can be defined in a friend declaration of a | ||||||
8841 | // class . . . . Such a function is implicitly inline. | ||||||
8842 | NewFD->setImplicitlyInline(); | ||||||
8843 | } | ||||||
8844 | |||||||
8845 | // If this is a method defined in an __interface, and is not a constructor | ||||||
8846 | // or an overloaded operator, then set the pure flag (isVirtual will already | ||||||
8847 | // return true). | ||||||
8848 | if (const CXXRecordDecl *Parent = | ||||||
8849 | dyn_cast<CXXRecordDecl>(NewFD->getDeclContext())) { | ||||||
8850 | if (Parent->isInterface() && cast<CXXMethodDecl>(NewFD)->isUserProvided()) | ||||||
8851 | NewFD->setPure(true); | ||||||
8852 | |||||||
8853 | // C++ [class.union]p2 | ||||||
8854 | // A union can have member functions, but not virtual functions. | ||||||
8855 | if (isVirtual && Parent->isUnion()) | ||||||
8856 | Diag(D.getDeclSpec().getVirtualSpecLoc(), diag::err_virtual_in_union); | ||||||
8857 | } | ||||||
8858 | |||||||
8859 | SetNestedNameSpecifier(*this, NewFD, D); | ||||||
8860 | isMemberSpecialization = false; | ||||||
8861 | isFunctionTemplateSpecialization = false; | ||||||
8862 | if (D.isInvalidType()) | ||||||
8863 | NewFD->setInvalidDecl(); | ||||||
8864 | |||||||
8865 | // Match up the template parameter lists with the scope specifier, then | ||||||
8866 | // determine whether we have a template or a template specialization. | ||||||
8867 | bool Invalid = false; | ||||||
8868 | TemplateParameterList *TemplateParams = | ||||||
8869 | MatchTemplateParametersToScopeSpecifier( | ||||||
8870 | D.getDeclSpec().getBeginLoc(), D.getIdentifierLoc(), | ||||||
8871 | D.getCXXScopeSpec(), | ||||||
8872 | D.getName().getKind() == UnqualifiedIdKind::IK_TemplateId | ||||||
8873 | ? D.getName().TemplateId | ||||||
8874 | : nullptr, | ||||||
8875 | TemplateParamLists, isFriend, isMemberSpecialization, | ||||||
8876 | Invalid); | ||||||
8877 | if (TemplateParams) { | ||||||
8878 | if (TemplateParams->size() > 0) { | ||||||
8879 | // This is a function template | ||||||
8880 | |||||||
8881 | // Check that we can declare a template here. | ||||||
8882 | if (CheckTemplateDeclScope(S, TemplateParams)) | ||||||
8883 | NewFD->setInvalidDecl(); | ||||||
8884 | |||||||
8885 | // A destructor cannot be a template. | ||||||
8886 | if (Name.getNameKind() == DeclarationName::CXXDestructorName) { | ||||||
8887 | Diag(NewFD->getLocation(), diag::err_destructor_template); | ||||||
8888 | NewFD->setInvalidDecl(); | ||||||
8889 | } | ||||||
8890 | |||||||
8891 | // If we're adding a template to a dependent context, we may need to | ||||||
8892 | // rebuilding some of the types used within the template parameter list, | ||||||
8893 | // now that we know what the current instantiation is. | ||||||
8894 | if (DC->isDependentContext()) { | ||||||
8895 | ContextRAII SavedContext(*this, DC); | ||||||
8896 | if (RebuildTemplateParamsInCurrentInstantiation(TemplateParams)) | ||||||
8897 | Invalid = true; | ||||||
8898 | } | ||||||
8899 | |||||||
8900 | FunctionTemplate = FunctionTemplateDecl::Create(Context, DC, | ||||||
8901 | NewFD->getLocation(), | ||||||
8902 | Name, TemplateParams, | ||||||
8903 | NewFD); | ||||||
8904 | FunctionTemplate->setLexicalDeclContext(CurContext); | ||||||
8905 | NewFD->setDescribedFunctionTemplate(FunctionTemplate); | ||||||
8906 | |||||||
8907 | // For source fidelity, store the other template param lists. | ||||||
8908 | if (TemplateParamLists.size() > 1) { | ||||||
8909 | NewFD->setTemplateParameterListsInfo(Context, | ||||||
8910 | ArrayRef<TemplateParameterList *>(TemplateParamLists) | ||||||
8911 | .drop_back(1)); | ||||||
8912 | } | ||||||
8913 | } else { | ||||||
8914 | // This is a function template specialization. | ||||||
8915 | isFunctionTemplateSpecialization = true; | ||||||
8916 | // For source fidelity, store all the template param lists. | ||||||
8917 | if (TemplateParamLists.size() > 0) | ||||||
8918 | NewFD->setTemplateParameterListsInfo(Context, TemplateParamLists); | ||||||
8919 | |||||||
8920 | // C++0x [temp.expl.spec]p20 forbids "template<> friend void foo(int);". | ||||||
8921 | if (isFriend) { | ||||||
8922 | // We want to remove the "template<>", found here. | ||||||
8923 | SourceRange RemoveRange = TemplateParams->getSourceRange(); | ||||||
8924 | |||||||
8925 | // If we remove the template<> and the name is not a | ||||||
8926 | // template-id, we're actually silently creating a problem: | ||||||
8927 | // the friend declaration will refer to an untemplated decl, | ||||||
8928 | // and clearly the user wants a template specialization. So | ||||||
8929 | // we need to insert '<>' after the name. | ||||||
8930 | SourceLocation InsertLoc; | ||||||
8931 | if (D.getName().getKind() != UnqualifiedIdKind::IK_TemplateId) { | ||||||
8932 | InsertLoc = D.getName().getSourceRange().getEnd(); | ||||||
8933 | InsertLoc = getLocForEndOfToken(InsertLoc); | ||||||
8934 | } | ||||||
8935 | |||||||
8936 | Diag(D.getIdentifierLoc(), diag::err_template_spec_decl_friend) | ||||||
8937 | << Name << RemoveRange | ||||||
8938 | << FixItHint::CreateRemoval(RemoveRange) | ||||||
8939 | << FixItHint::CreateInsertion(InsertLoc, "<>"); | ||||||
8940 | } | ||||||
8941 | } | ||||||
8942 | } else { | ||||||
8943 | // All template param lists were matched against the scope specifier: | ||||||
8944 | // this is NOT (an explicit specialization of) a template. | ||||||
8945 | if (TemplateParamLists.size() > 0) | ||||||
8946 | // For source fidelity, store all the template param lists. | ||||||
8947 | NewFD->setTemplateParameterListsInfo(Context, TemplateParamLists); | ||||||
8948 | } | ||||||
8949 | |||||||
8950 | if (Invalid) { | ||||||
8951 | NewFD->setInvalidDecl(); | ||||||
8952 | if (FunctionTemplate) | ||||||
8953 | FunctionTemplate->setInvalidDecl(); | ||||||
8954 | } | ||||||
8955 | |||||||
8956 | // C++ [dcl.fct.spec]p5: | ||||||
8957 | // The virtual specifier shall only be used in declarations of | ||||||
8958 | // nonstatic class member functions that appear within a | ||||||
8959 | // member-specification of a class declaration; see 10.3. | ||||||
8960 | // | ||||||
8961 | if (isVirtual && !NewFD->isInvalidDecl()) { | ||||||
8962 | if (!isVirtualOkay) { | ||||||
8963 | Diag(D.getDeclSpec().getVirtualSpecLoc(), | ||||||
8964 | diag::err_virtual_non_function); | ||||||
8965 | } else if (!CurContext->isRecord()) { | ||||||
8966 | // 'virtual' was specified outside of the class. | ||||||
8967 | Diag(D.getDeclSpec().getVirtualSpecLoc(), | ||||||
8968 | diag::err_virtual_out_of_class) | ||||||
8969 | << FixItHint::CreateRemoval(D.getDeclSpec().getVirtualSpecLoc()); | ||||||
8970 | } else if (NewFD->getDescribedFunctionTemplate()) { | ||||||
8971 | // C++ [temp.mem]p3: | ||||||
8972 | // A member function template shall not be virtual. | ||||||
8973 | Diag(D.getDeclSpec().getVirtualSpecLoc(), | ||||||
8974 | diag::err_virtual_member_function_template) | ||||||
8975 | << FixItHint::CreateRemoval(D.getDeclSpec().getVirtualSpecLoc()); | ||||||
8976 | } else { | ||||||
8977 | // Okay: Add virtual to the method. | ||||||
8978 | NewFD->setVirtualAsWritten(true); | ||||||
8979 | } | ||||||
8980 | |||||||
8981 | if (getLangOpts().CPlusPlus14 && | ||||||
8982 | NewFD->getReturnType()->isUndeducedType()) | ||||||
8983 | Diag(D.getDeclSpec().getVirtualSpecLoc(), diag::err_auto_fn_virtual); | ||||||
8984 | } | ||||||
8985 | |||||||
8986 | if (getLangOpts().CPlusPlus14 && | ||||||
8987 | (NewFD->isDependentContext() || | ||||||
8988 | (isFriend && CurContext->isDependentContext())) && | ||||||
8989 | NewFD->getReturnType()->isUndeducedType()) { | ||||||
8990 | // If the function template is referenced directly (for instance, as a | ||||||
8991 | // member of the current instantiation), pretend it has a dependent type. | ||||||
8992 | // This is not really justified by the standard, but is the only sane | ||||||
8993 | // thing to do. | ||||||
8994 | // FIXME: For a friend function, we have not marked the function as being | ||||||
8995 | // a friend yet, so 'isDependentContext' on the FD doesn't work. | ||||||
8996 | const FunctionProtoType *FPT = | ||||||
8997 | NewFD->getType()->castAs<FunctionProtoType>(); | ||||||
8998 | QualType Result = | ||||||
8999 | SubstAutoType(FPT->getReturnType(), Context.DependentTy); | ||||||
9000 | NewFD->setType(Context.getFunctionType(Result, FPT->getParamTypes(), | ||||||
9001 | FPT->getExtProtoInfo())); | ||||||
9002 | } | ||||||
9003 | |||||||
9004 | // C++ [dcl.fct.spec]p3: | ||||||
9005 | // The inline specifier shall not appear on a block scope function | ||||||
9006 | // declaration. | ||||||
9007 | if (isInline && !NewFD->isInvalidDecl()) { | ||||||
9008 | if (CurContext->isFunctionOrMethod()) { | ||||||
9009 | // 'inline' is not allowed on block scope function declaration. | ||||||
9010 | Diag(D.getDeclSpec().getInlineSpecLoc(), | ||||||
9011 | diag::err_inline_declaration_block_scope) << Name | ||||||
9012 | << FixItHint::CreateRemoval(D.getDeclSpec().getInlineSpecLoc()); | ||||||
9013 | } | ||||||
9014 | } | ||||||
9015 | |||||||
9016 | // C++ [dcl.fct.spec]p6: | ||||||
9017 | // The explicit specifier shall be used only in the declaration of a | ||||||
9018 | // constructor or conversion function within its class definition; | ||||||
9019 | // see 12.3.1 and 12.3.2. | ||||||
9020 | if (hasExplicit && !NewFD->isInvalidDecl() && | ||||||
9021 | !isa<CXXDeductionGuideDecl>(NewFD)) { | ||||||
9022 | if (!CurContext->isRecord()) { | ||||||
9023 | // 'explicit' was specified outside of the class. | ||||||
9024 | Diag(D.getDeclSpec().getExplicitSpecLoc(), | ||||||
9025 | diag::err_explicit_out_of_class) | ||||||
9026 | << FixItHint::CreateRemoval(D.getDeclSpec().getExplicitSpecRange()); | ||||||
9027 | } else if (!isa<CXXConstructorDecl>(NewFD) && | ||||||
9028 | !isa<CXXConversionDecl>(NewFD)) { | ||||||
9029 | // 'explicit' was specified on a function that wasn't a constructor | ||||||
9030 | // or conversion function. | ||||||
9031 | Diag(D.getDeclSpec().getExplicitSpecLoc(), | ||||||
9032 | diag::err_explicit_non_ctor_or_conv_function) | ||||||
9033 | << FixItHint::CreateRemoval(D.getDeclSpec().getExplicitSpecRange()); | ||||||
9034 | } | ||||||
9035 | } | ||||||
9036 | |||||||
9037 | if (ConstexprSpecKind ConstexprKind = | ||||||
9038 | D.getDeclSpec().getConstexprSpecifier()) { | ||||||
9039 | // C++11 [dcl.constexpr]p2: constexpr functions and constexpr constructors | ||||||
9040 | // are implicitly inline. | ||||||
9041 | NewFD->setImplicitlyInline(); | ||||||
9042 | |||||||
9043 | // C++11 [dcl.constexpr]p3: functions declared constexpr are required to | ||||||
9044 | // be either constructors or to return a literal type. Therefore, | ||||||
9045 | // destructors cannot be declared constexpr. | ||||||
9046 | if (isa<CXXDestructorDecl>(NewFD) && | ||||||
9047 | (!getLangOpts().CPlusPlus2a || ConstexprKind == CSK_consteval)) { | ||||||
9048 | Diag(D.getDeclSpec().getConstexprSpecLoc(), diag::err_constexpr_dtor) | ||||||
9049 | << ConstexprKind; | ||||||
9050 | NewFD->setConstexprKind(getLangOpts().CPlusPlus2a ? CSK_unspecified : CSK_constexpr); | ||||||
9051 | } | ||||||
9052 | // C++20 [dcl.constexpr]p2: An allocation function, or a | ||||||
9053 | // deallocation function shall not be declared with the consteval | ||||||
9054 | // specifier. | ||||||
9055 | if (ConstexprKind == CSK_consteval && | ||||||
9056 | (NewFD->getOverloadedOperator() == OO_New || | ||||||
9057 | NewFD->getOverloadedOperator() == OO_Array_New || | ||||||
9058 | NewFD->getOverloadedOperator() == OO_Delete || | ||||||
9059 | NewFD->getOverloadedOperator() == OO_Array_Delete)) { | ||||||
9060 | Diag(D.getDeclSpec().getConstexprSpecLoc(), | ||||||
9061 | diag::err_invalid_consteval_decl_kind) | ||||||
9062 | << NewFD; | ||||||
9063 | NewFD->setConstexprKind(CSK_constexpr); | ||||||
9064 | } | ||||||
9065 | } | ||||||
9066 | |||||||
9067 | // If __module_private__ was specified, mark the function accordingly. | ||||||
9068 | if (D.getDeclSpec().isModulePrivateSpecified()) { | ||||||
9069 | if (isFunctionTemplateSpecialization) { | ||||||
9070 | SourceLocation ModulePrivateLoc | ||||||
9071 | = D.getDeclSpec().getModulePrivateSpecLoc(); | ||||||
9072 | Diag(ModulePrivateLoc, diag::err_module_private_specialization) | ||||||
9073 | << 0 | ||||||
9074 | << FixItHint::CreateRemoval(ModulePrivateLoc); | ||||||
9075 | } else { | ||||||
9076 | NewFD->setModulePrivate(); | ||||||
9077 | if (FunctionTemplate) | ||||||
9078 | FunctionTemplate->setModulePrivate(); | ||||||
9079 | } | ||||||
9080 | } | ||||||
9081 | |||||||
9082 | if (isFriend) { | ||||||
9083 | if (FunctionTemplate) { | ||||||
9084 | FunctionTemplate->setObjectOfFriendDecl(); | ||||||
9085 | FunctionTemplate->setAccess(AS_public); | ||||||
9086 | } | ||||||
9087 | NewFD->setObjectOfFriendDecl(); | ||||||
9088 | NewFD->setAccess(AS_public); | ||||||
9089 | } | ||||||
9090 | |||||||
9091 | // If a function is defined as defaulted or deleted, mark it as such now. | ||||||
9092 | // FIXME: Does this ever happen? ActOnStartOfFunctionDef forces the function | ||||||
9093 | // definition kind to FDK_Definition. | ||||||
9094 | switch (D.getFunctionDefinitionKind()) { | ||||||
9095 | case FDK_Declaration: | ||||||
9096 | case FDK_Definition: | ||||||
9097 | break; | ||||||
9098 | |||||||
9099 | case FDK_Defaulted: | ||||||
9100 | NewFD->setDefaulted(); | ||||||
9101 | break; | ||||||
9102 | |||||||
9103 | case FDK_Deleted: | ||||||
9104 | NewFD->setDeletedAsWritten(); | ||||||
9105 | break; | ||||||
9106 | } | ||||||
9107 | |||||||
9108 | if (isa<CXXMethodDecl>(NewFD) && DC == CurContext && | ||||||
9109 | D.isFunctionDefinition()) { | ||||||
9110 | // C++ [class.mfct]p2: | ||||||
9111 | // A member function may be defined (8.4) in its class definition, in | ||||||
9112 | // which case it is an inline member function (7.1.2) | ||||||
9113 | NewFD->setImplicitlyInline(); | ||||||
9114 | } | ||||||
9115 | |||||||
9116 | if (SC == SC_Static && isa<CXXMethodDecl>(NewFD) && | ||||||
9117 | !CurContext->isRecord()) { | ||||||
9118 | // C++ [class.static]p1: | ||||||
9119 | // A data or function member of a class may be declared static | ||||||
9120 | // in a class definition, in which case it is a static member of | ||||||
9121 | // the class. | ||||||
9122 | |||||||
9123 | // Complain about the 'static' specifier if it's on an out-of-line | ||||||
9124 | // member function definition. | ||||||
9125 | |||||||
9126 | // MSVC permits the use of a 'static' storage specifier on an out-of-line | ||||||
9127 | // member function template declaration and class member template | ||||||
9128 | // declaration (MSVC versions before 2015), warn about this. | ||||||
9129 | Diag(D.getDeclSpec().getStorageClassSpecLoc(), | ||||||
9130 | ((!getLangOpts().isCompatibleWithMSVC(LangOptions::MSVC2015) && | ||||||
9131 | cast<CXXRecordDecl>(DC)->getDescribedClassTemplate()) || | ||||||
9132 | (getLangOpts().MSVCCompat && NewFD->getDescribedFunctionTemplate())) | ||||||
9133 | ? diag::ext_static_out_of_line : diag::err_static_out_of_line) | ||||||
9134 | << FixItHint::CreateRemoval(D.getDeclSpec().getStorageClassSpecLoc()); | ||||||
9135 | } | ||||||
9136 | |||||||
9137 | // C++11 [except.spec]p15: | ||||||
9138 | // A deallocation function with no exception-specification is treated | ||||||
9139 | // as if it were specified with noexcept(true). | ||||||
9140 | const FunctionProtoType *FPT = R->getAs<FunctionProtoType>(); | ||||||
9141 | if ((Name.getCXXOverloadedOperator() == OO_Delete || | ||||||
9142 | Name.getCXXOverloadedOperator() == OO_Array_Delete) && | ||||||
9143 | getLangOpts().CPlusPlus11 && FPT && !FPT->hasExceptionSpec()) | ||||||
9144 | NewFD->setType(Context.getFunctionType( | ||||||
9145 | FPT->getReturnType(), FPT->getParamTypes(), | ||||||
9146 | FPT->getExtProtoInfo().withExceptionSpec(EST_BasicNoexcept))); | ||||||
9147 | } | ||||||
9148 | |||||||
9149 | // Filter out previous declarations that don't match the scope. | ||||||
9150 | FilterLookupForScope(Previous, OriginalDC, S, shouldConsiderLinkage(NewFD), | ||||||
9151 | D.getCXXScopeSpec().isNotEmpty() || | ||||||
9152 | isMemberSpecialization || | ||||||
9153 | isFunctionTemplateSpecialization); | ||||||
9154 | |||||||
9155 | // Handle GNU asm-label extension (encoded as an attribute). | ||||||
9156 | if (Expr *E = (Expr*) D.getAsmLabel()) { | ||||||
9157 | // The parser guarantees this is a string. | ||||||
9158 | StringLiteral *SE = cast<StringLiteral>(E); | ||||||
9159 | NewFD->addAttr(AsmLabelAttr::Create(Context, SE->getString(), | ||||||
9160 | /*IsLiteralLabel=*/true, | ||||||
9161 | SE->getStrTokenLoc(0))); | ||||||
9162 | } else if (!ExtnameUndeclaredIdentifiers.empty()) { | ||||||
9163 | llvm::DenseMap<IdentifierInfo*,AsmLabelAttr*>::iterator I = | ||||||
9164 | ExtnameUndeclaredIdentifiers.find(NewFD->getIdentifier()); | ||||||
9165 | if (I != ExtnameUndeclaredIdentifiers.end()) { | ||||||
9166 | if (isDeclExternC(NewFD)) { | ||||||
9167 | NewFD->addAttr(I->second); | ||||||
9168 | ExtnameUndeclaredIdentifiers.erase(I); | ||||||
9169 | } else | ||||||
9170 | Diag(NewFD->getLocation(), diag::warn_redefine_extname_not_applied) | ||||||
9171 | << /*Variable*/0 << NewFD; | ||||||
9172 | } | ||||||
9173 | } | ||||||
9174 | |||||||
9175 | // Copy the parameter declarations from the declarator D to the function | ||||||
9176 | // declaration NewFD, if they are available. First scavenge them into Params. | ||||||
9177 | SmallVector<ParmVarDecl*, 16> Params; | ||||||
9178 | unsigned FTIIdx; | ||||||
9179 | if (D.isFunctionDeclarator(FTIIdx)) { | ||||||
9180 | DeclaratorChunk::FunctionTypeInfo &FTI = D.getTypeObject(FTIIdx).Fun; | ||||||
9181 | |||||||
9182 | // Check for C99 6.7.5.3p10 - foo(void) is a non-varargs | ||||||
9183 | // function that takes no arguments, not a function that takes a | ||||||
9184 | // single void argument. | ||||||
9185 | // We let through "const void" here because Sema::GetTypeForDeclarator | ||||||
9186 | // already checks for that case. | ||||||
9187 | if (FTIHasNonVoidParameters(FTI) && FTI.Params[0].Param) { | ||||||
9188 | for (unsigned i = 0, e = FTI.NumParams; i != e; ++i) { | ||||||
9189 | ParmVarDecl *Param = cast<ParmVarDecl>(FTI.Params[i].Param); | ||||||
9190 | assert(Param->getDeclContext() != NewFD && "Was set before ?")((Param->getDeclContext() != NewFD && "Was set before ?" ) ? static_cast<void> (0) : __assert_fail ("Param->getDeclContext() != NewFD && \"Was set before ?\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 9190, __PRETTY_FUNCTION__)); | ||||||
9191 | Param->setDeclContext(NewFD); | ||||||
9192 | Params.push_back(Param); | ||||||
9193 | |||||||
9194 | if (Param->isInvalidDecl()) | ||||||
9195 | NewFD->setInvalidDecl(); | ||||||
9196 | } | ||||||
9197 | } | ||||||
9198 | |||||||
9199 | if (!getLangOpts().CPlusPlus) { | ||||||
9200 | // In C, find all the tag declarations from the prototype and move them | ||||||
9201 | // into the function DeclContext. Remove them from the surrounding tag | ||||||
9202 | // injection context of the function, which is typically but not always | ||||||
9203 | // the TU. | ||||||
9204 | DeclContext *PrototypeTagContext = | ||||||
9205 | getTagInjectionContext(NewFD->getLexicalDeclContext()); | ||||||
9206 | for (NamedDecl *NonParmDecl : FTI.getDeclsInPrototype()) { | ||||||
9207 | auto *TD = dyn_cast<TagDecl>(NonParmDecl); | ||||||
9208 | |||||||
9209 | // We don't want to reparent enumerators. Look at their parent enum | ||||||
9210 | // instead. | ||||||
9211 | if (!TD) { | ||||||
9212 | if (auto *ECD = dyn_cast<EnumConstantDecl>(NonParmDecl)) | ||||||
9213 | TD = cast<EnumDecl>(ECD->getDeclContext()); | ||||||
9214 | } | ||||||
9215 | if (!TD) | ||||||
9216 | continue; | ||||||
9217 | DeclContext *TagDC = TD->getLexicalDeclContext(); | ||||||
9218 | if (!TagDC->containsDecl(TD)) | ||||||
9219 | continue; | ||||||
9220 | TagDC->removeDecl(TD); | ||||||
9221 | TD->setDeclContext(NewFD); | ||||||
9222 | NewFD->addDecl(TD); | ||||||
9223 | |||||||
9224 | // Preserve the lexical DeclContext if it is not the surrounding tag | ||||||
9225 | // injection context of the FD. In this example, the semantic context of | ||||||
9226 | // E will be f and the lexical context will be S, while both the | ||||||
9227 | // semantic and lexical contexts of S will be f: | ||||||
9228 | // void f(struct S { enum E { a } f; } s); | ||||||
9229 | if (TagDC != PrototypeTagContext) | ||||||
9230 | TD->setLexicalDeclContext(TagDC); | ||||||
9231 | } | ||||||
9232 | } | ||||||
9233 | } else if (const FunctionProtoType *FT = R->getAs<FunctionProtoType>()) { | ||||||
9234 | // When we're declaring a function with a typedef, typeof, etc as in the | ||||||
9235 | // following example, we'll need to synthesize (unnamed) | ||||||
9236 | // parameters for use in the declaration. | ||||||
9237 | // | ||||||
9238 | // @code | ||||||
9239 | // typedef void fn(int); | ||||||
9240 | // fn f; | ||||||
9241 | // @endcode | ||||||
9242 | |||||||
9243 | // Synthesize a parameter for each argument type. | ||||||
9244 | for (const auto &AI : FT->param_types()) { | ||||||
9245 | ParmVarDecl *Param = | ||||||
9246 | BuildParmVarDeclForTypedef(NewFD, D.getIdentifierLoc(), AI); | ||||||
9247 | Param->setScopeInfo(0, Params.size()); | ||||||
9248 | Params.push_back(Param); | ||||||
9249 | } | ||||||
9250 | } else { | ||||||
9251 | assert(R->isFunctionNoProtoType() && NewFD->getNumParams() == 0 &&((R->isFunctionNoProtoType() && NewFD->getNumParams () == 0 && "Should not need args for typedef of non-prototype fn" ) ? static_cast<void> (0) : __assert_fail ("R->isFunctionNoProtoType() && NewFD->getNumParams() == 0 && \"Should not need args for typedef of non-prototype fn\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 9252, __PRETTY_FUNCTION__)) | ||||||
9252 | "Should not need args for typedef of non-prototype fn")((R->isFunctionNoProtoType() && NewFD->getNumParams () == 0 && "Should not need args for typedef of non-prototype fn" ) ? static_cast<void> (0) : __assert_fail ("R->isFunctionNoProtoType() && NewFD->getNumParams() == 0 && \"Should not need args for typedef of non-prototype fn\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 9252, __PRETTY_FUNCTION__)); | ||||||
9253 | } | ||||||
9254 | |||||||
9255 | // Finally, we know we have the right number of parameters, install them. | ||||||
9256 | NewFD->setParams(Params); | ||||||
9257 | |||||||
9258 | if (D.getDeclSpec().isNoreturnSpecified()) | ||||||
9259 | NewFD->addAttr(C11NoReturnAttr::Create(Context, | ||||||
9260 | D.getDeclSpec().getNoreturnSpecLoc(), | ||||||
9261 | AttributeCommonInfo::AS_Keyword)); | ||||||
9262 | |||||||
9263 | // Functions returning a variably modified type violate C99 6.7.5.2p2 | ||||||
9264 | // because all functions have linkage. | ||||||
9265 | if (!NewFD->isInvalidDecl() && | ||||||
9266 | NewFD->getReturnType()->isVariablyModifiedType()) { | ||||||
9267 | Diag(NewFD->getLocation(), diag::err_vm_func_decl); | ||||||
9268 | NewFD->setInvalidDecl(); | ||||||
9269 | } | ||||||
9270 | |||||||
9271 | // Apply an implicit SectionAttr if '#pragma clang section text' is active | ||||||
9272 | if (PragmaClangTextSection.Valid && D.isFunctionDefinition() && | ||||||
9273 | !NewFD->hasAttr<SectionAttr>()) | ||||||
9274 | NewFD->addAttr(PragmaClangTextSectionAttr::CreateImplicit( | ||||||
9275 | Context, PragmaClangTextSection.SectionName, | ||||||
9276 | PragmaClangTextSection.PragmaLocation, AttributeCommonInfo::AS_Pragma)); | ||||||
9277 | |||||||
9278 | // Apply an implicit SectionAttr if #pragma code_seg is active. | ||||||
9279 | if (CodeSegStack.CurrentValue && D.isFunctionDefinition() && | ||||||
9280 | !NewFD->hasAttr<SectionAttr>()) { | ||||||
9281 | NewFD->addAttr(SectionAttr::CreateImplicit( | ||||||
9282 | Context, CodeSegStack.CurrentValue->getString(), | ||||||
9283 | CodeSegStack.CurrentPragmaLocation, AttributeCommonInfo::AS_Pragma, | ||||||
9284 | SectionAttr::Declspec_allocate)); | ||||||
9285 | if (UnifySection(CodeSegStack.CurrentValue->getString(), | ||||||
9286 | ASTContext::PSF_Implicit | ASTContext::PSF_Execute | | ||||||
9287 | ASTContext::PSF_Read, | ||||||
9288 | NewFD)) | ||||||
9289 | NewFD->dropAttr<SectionAttr>(); | ||||||
9290 | } | ||||||
9291 | |||||||
9292 | // Apply an implicit CodeSegAttr from class declspec or | ||||||
9293 | // apply an implicit SectionAttr from #pragma code_seg if active. | ||||||
9294 | if (!NewFD->hasAttr<CodeSegAttr>()) { | ||||||
9295 | if (Attr *SAttr = getImplicitCodeSegOrSectionAttrForFunction(NewFD, | ||||||
9296 | D.isFunctionDefinition())) { | ||||||
9297 | NewFD->addAttr(SAttr); | ||||||
9298 | } | ||||||
9299 | } | ||||||
9300 | |||||||
9301 | // Handle attributes. | ||||||
9302 | ProcessDeclAttributes(S, NewFD, D); | ||||||
9303 | |||||||
9304 | if (getLangOpts().OpenCL) { | ||||||
9305 | // OpenCL v1.1 s6.5: Using an address space qualifier in a function return | ||||||
9306 | // type declaration will generate a compilation error. | ||||||
9307 | LangAS AddressSpace = NewFD->getReturnType().getAddressSpace(); | ||||||
9308 | if (AddressSpace != LangAS::Default) { | ||||||
9309 | Diag(NewFD->getLocation(), | ||||||
9310 | diag::err_opencl_return_value_with_address_space); | ||||||
9311 | NewFD->setInvalidDecl(); | ||||||
9312 | } | ||||||
9313 | } | ||||||
9314 | |||||||
9315 | if (!getLangOpts().CPlusPlus) { | ||||||
9316 | // Perform semantic checking on the function declaration. | ||||||
9317 | if (!NewFD->isInvalidDecl() && NewFD->isMain()) | ||||||
9318 | CheckMain(NewFD, D.getDeclSpec()); | ||||||
9319 | |||||||
9320 | if (!NewFD->isInvalidDecl() && NewFD->isMSVCRTEntryPoint()) | ||||||
9321 | CheckMSVCRTEntryPoint(NewFD); | ||||||
9322 | |||||||
9323 | if (!NewFD->isInvalidDecl()) | ||||||
9324 | D.setRedeclaration(CheckFunctionDeclaration(S, NewFD, Previous, | ||||||
9325 | isMemberSpecialization)); | ||||||
9326 | else if (!Previous.empty()) | ||||||
9327 | // Recover gracefully from an invalid redeclaration. | ||||||
9328 | D.setRedeclaration(true); | ||||||
9329 | assert((NewFD->isInvalidDecl() || !D.isRedeclaration() ||(((NewFD->isInvalidDecl() || !D.isRedeclaration() || Previous .getResultKind() != LookupResult::FoundOverloaded) && "previous declaration set still overloaded") ? static_cast< void> (0) : __assert_fail ("(NewFD->isInvalidDecl() || !D.isRedeclaration() || Previous.getResultKind() != LookupResult::FoundOverloaded) && \"previous declaration set still overloaded\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 9331, __PRETTY_FUNCTION__)) | ||||||
9330 | Previous.getResultKind() != LookupResult::FoundOverloaded) &&(((NewFD->isInvalidDecl() || !D.isRedeclaration() || Previous .getResultKind() != LookupResult::FoundOverloaded) && "previous declaration set still overloaded") ? static_cast< void> (0) : __assert_fail ("(NewFD->isInvalidDecl() || !D.isRedeclaration() || Previous.getResultKind() != LookupResult::FoundOverloaded) && \"previous declaration set still overloaded\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 9331, __PRETTY_FUNCTION__)) | ||||||
9331 | "previous declaration set still overloaded")(((NewFD->isInvalidDecl() || !D.isRedeclaration() || Previous .getResultKind() != LookupResult::FoundOverloaded) && "previous declaration set still overloaded") ? static_cast< void> (0) : __assert_fail ("(NewFD->isInvalidDecl() || !D.isRedeclaration() || Previous.getResultKind() != LookupResult::FoundOverloaded) && \"previous declaration set still overloaded\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 9331, __PRETTY_FUNCTION__)); | ||||||
9332 | |||||||
9333 | // Diagnose no-prototype function declarations with calling conventions that | ||||||
9334 | // don't support variadic calls. Only do this in C and do it after merging | ||||||
9335 | // possibly prototyped redeclarations. | ||||||
9336 | const FunctionType *FT = NewFD->getType()->castAs<FunctionType>(); | ||||||
9337 | if (isa<FunctionNoProtoType>(FT) && !D.isFunctionDefinition()) { | ||||||
9338 | CallingConv CC = FT->getExtInfo().getCC(); | ||||||
9339 | if (!supportsVariadicCall(CC)) { | ||||||
9340 | // Windows system headers sometimes accidentally use stdcall without | ||||||
9341 | // (void) parameters, so we relax this to a warning. | ||||||
9342 | int DiagID = | ||||||
9343 | CC == CC_X86StdCall ? diag::warn_cconv_knr : diag::err_cconv_knr; | ||||||
9344 | Diag(NewFD->getLocation(), DiagID) | ||||||
9345 | << FunctionType::getNameForCallConv(CC); | ||||||
9346 | } | ||||||
9347 | } | ||||||
9348 | |||||||
9349 | if (NewFD->getReturnType().hasNonTrivialToPrimitiveDestructCUnion() || | ||||||
9350 | NewFD->getReturnType().hasNonTrivialToPrimitiveCopyCUnion()) | ||||||
9351 | checkNonTrivialCUnion(NewFD->getReturnType(), | ||||||
9352 | NewFD->getReturnTypeSourceRange().getBegin(), | ||||||
9353 | NTCUC_FunctionReturn, NTCUK_Destruct|NTCUK_Copy); | ||||||
9354 | } else { | ||||||
9355 | // C++11 [replacement.functions]p3: | ||||||
9356 | // The program's definitions shall not be specified as inline. | ||||||
9357 | // | ||||||
9358 | // N.B. We diagnose declarations instead of definitions per LWG issue 2340. | ||||||
9359 | // | ||||||
9360 | // Suppress the diagnostic if the function is __attribute__((used)), since | ||||||
9361 | // that forces an external definition to be emitted. | ||||||
9362 | if (D.getDeclSpec().isInlineSpecified() && | ||||||
9363 | NewFD->isReplaceableGlobalAllocationFunction() && | ||||||
9364 | !NewFD->hasAttr<UsedAttr>()) | ||||||
9365 | Diag(D.getDeclSpec().getInlineSpecLoc(), | ||||||
9366 | diag::ext_operator_new_delete_declared_inline) | ||||||
9367 | << NewFD->getDeclName(); | ||||||
9368 | |||||||
9369 | // If the declarator is a template-id, translate the parser's template | ||||||
9370 | // argument list into our AST format. | ||||||
9371 | if (D.getName().getKind() == UnqualifiedIdKind::IK_TemplateId) { | ||||||
9372 | TemplateIdAnnotation *TemplateId = D.getName().TemplateId; | ||||||
9373 | TemplateArgs.setLAngleLoc(TemplateId->LAngleLoc); | ||||||
9374 | TemplateArgs.setRAngleLoc(TemplateId->RAngleLoc); | ||||||
9375 | ASTTemplateArgsPtr TemplateArgsPtr(TemplateId->getTemplateArgs(), | ||||||
9376 | TemplateId->NumArgs); | ||||||
9377 | translateTemplateArguments(TemplateArgsPtr, | ||||||
9378 | TemplateArgs); | ||||||
9379 | |||||||
9380 | HasExplicitTemplateArgs = true; | ||||||
9381 | |||||||
9382 | if (NewFD->isInvalidDecl()) { | ||||||
9383 | HasExplicitTemplateArgs = false; | ||||||
9384 | } else if (FunctionTemplate) { | ||||||
9385 | // Function template with explicit template arguments. | ||||||
9386 | Diag(D.getIdentifierLoc(), diag::err_function_template_partial_spec) | ||||||
9387 | << SourceRange(TemplateId->LAngleLoc, TemplateId->RAngleLoc); | ||||||
9388 | |||||||
9389 | HasExplicitTemplateArgs = false; | ||||||
9390 | } else { | ||||||
9391 | assert((isFunctionTemplateSpecialization ||(((isFunctionTemplateSpecialization || D.getDeclSpec().isFriendSpecified ()) && "should have a 'template<>' for this decl" ) ? static_cast<void> (0) : __assert_fail ("(isFunctionTemplateSpecialization || D.getDeclSpec().isFriendSpecified()) && \"should have a 'template<>' for this decl\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 9393, __PRETTY_FUNCTION__)) | ||||||
9392 | D.getDeclSpec().isFriendSpecified()) &&(((isFunctionTemplateSpecialization || D.getDeclSpec().isFriendSpecified ()) && "should have a 'template<>' for this decl" ) ? static_cast<void> (0) : __assert_fail ("(isFunctionTemplateSpecialization || D.getDeclSpec().isFriendSpecified()) && \"should have a 'template<>' for this decl\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 9393, __PRETTY_FUNCTION__)) | ||||||
9393 | "should have a 'template<>' for this decl")(((isFunctionTemplateSpecialization || D.getDeclSpec().isFriendSpecified ()) && "should have a 'template<>' for this decl" ) ? static_cast<void> (0) : __assert_fail ("(isFunctionTemplateSpecialization || D.getDeclSpec().isFriendSpecified()) && \"should have a 'template<>' for this decl\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 9393, __PRETTY_FUNCTION__)); | ||||||
9394 | // "friend void foo<>(int);" is an implicit specialization decl. | ||||||
9395 | isFunctionTemplateSpecialization = true; | ||||||
9396 | } | ||||||
9397 | } else if (isFriend && isFunctionTemplateSpecialization) { | ||||||
9398 | // This combination is only possible in a recovery case; the user | ||||||
9399 | // wrote something like: | ||||||
9400 | // template <> friend void foo(int); | ||||||
9401 | // which we're recovering from as if the user had written: | ||||||
9402 | // friend void foo<>(int); | ||||||
9403 | // Go ahead and fake up a template id. | ||||||
9404 | HasExplicitTemplateArgs = true; | ||||||
9405 | TemplateArgs.setLAngleLoc(D.getIdentifierLoc()); | ||||||
9406 | TemplateArgs.setRAngleLoc(D.getIdentifierLoc()); | ||||||
9407 | } | ||||||
9408 | |||||||
9409 | // We do not add HD attributes to specializations here because | ||||||
9410 | // they may have different constexpr-ness compared to their | ||||||
9411 | // templates and, after maybeAddCUDAHostDeviceAttrs() is applied, | ||||||
9412 | // may end up with different effective targets. Instead, a | ||||||
9413 | // specialization inherits its target attributes from its template | ||||||
9414 | // in the CheckFunctionTemplateSpecialization() call below. | ||||||
9415 | if (getLangOpts().CUDA && !isFunctionTemplateSpecialization) | ||||||
9416 | maybeAddCUDAHostDeviceAttrs(NewFD, Previous); | ||||||
9417 | |||||||
9418 | // If it's a friend (and only if it's a friend), it's possible | ||||||
9419 | // that either the specialized function type or the specialized | ||||||
9420 | // template is dependent, and therefore matching will fail. In | ||||||
9421 | // this case, don't check the specialization yet. | ||||||
9422 | bool InstantiationDependent = false; | ||||||
9423 | if (isFunctionTemplateSpecialization && isFriend && | ||||||
9424 | (NewFD->getType()->isDependentType() || DC->isDependentContext() || | ||||||
9425 | TemplateSpecializationType::anyDependentTemplateArguments( | ||||||
9426 | TemplateArgs, | ||||||
9427 | InstantiationDependent))) { | ||||||
9428 | assert(HasExplicitTemplateArgs &&((HasExplicitTemplateArgs && "friend function specialization without template args" ) ? static_cast<void> (0) : __assert_fail ("HasExplicitTemplateArgs && \"friend function specialization without template args\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 9429, __PRETTY_FUNCTION__)) | ||||||
9429 | "friend function specialization without template args")((HasExplicitTemplateArgs && "friend function specialization without template args" ) ? static_cast<void> (0) : __assert_fail ("HasExplicitTemplateArgs && \"friend function specialization without template args\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 9429, __PRETTY_FUNCTION__)); | ||||||
9430 | if (CheckDependentFunctionTemplateSpecialization(NewFD, TemplateArgs, | ||||||
9431 | Previous)) | ||||||
9432 | NewFD->setInvalidDecl(); | ||||||
9433 | } else if (isFunctionTemplateSpecialization) { | ||||||
9434 | if (CurContext->isDependentContext() && CurContext->isRecord() | ||||||
9435 | && !isFriend) { | ||||||
9436 | isDependentClassScopeExplicitSpecialization = true; | ||||||
9437 | } else if (!NewFD->isInvalidDecl() && | ||||||
9438 | CheckFunctionTemplateSpecialization( | ||||||
9439 | NewFD, (HasExplicitTemplateArgs ? &TemplateArgs : nullptr), | ||||||
9440 | Previous)) | ||||||
9441 | NewFD->setInvalidDecl(); | ||||||
9442 | |||||||
9443 | // C++ [dcl.stc]p1: | ||||||
9444 | // A storage-class-specifier shall not be specified in an explicit | ||||||
9445 | // specialization (14.7.3) | ||||||
9446 | FunctionTemplateSpecializationInfo *Info = | ||||||
9447 | NewFD->getTemplateSpecializationInfo(); | ||||||
9448 | if (Info && SC != SC_None) { | ||||||
9449 | if (SC != Info->getTemplate()->getTemplatedDecl()->getStorageClass()) | ||||||
9450 | Diag(NewFD->getLocation(), | ||||||
9451 | diag::err_explicit_specialization_inconsistent_storage_class) | ||||||
9452 | << SC | ||||||
9453 | << FixItHint::CreateRemoval( | ||||||
9454 | D.getDeclSpec().getStorageClassSpecLoc()); | ||||||
9455 | |||||||
9456 | else | ||||||
9457 | Diag(NewFD->getLocation(), | ||||||
9458 | diag::ext_explicit_specialization_storage_class) | ||||||
9459 | << FixItHint::CreateRemoval( | ||||||
9460 | D.getDeclSpec().getStorageClassSpecLoc()); | ||||||
9461 | } | ||||||
9462 | } else if (isMemberSpecialization && isa<CXXMethodDecl>(NewFD)) { | ||||||
9463 | if (CheckMemberSpecialization(NewFD, Previous)) | ||||||
9464 | NewFD->setInvalidDecl(); | ||||||
9465 | } | ||||||
9466 | |||||||
9467 | // Perform semantic checking on the function declaration. | ||||||
9468 | if (!isDependentClassScopeExplicitSpecialization) { | ||||||
9469 | if (!NewFD->isInvalidDecl() && NewFD->isMain()) | ||||||
9470 | CheckMain(NewFD, D.getDeclSpec()); | ||||||
9471 | |||||||
9472 | if (!NewFD->isInvalidDecl() && NewFD->isMSVCRTEntryPoint()) | ||||||
9473 | CheckMSVCRTEntryPoint(NewFD); | ||||||
9474 | |||||||
9475 | if (!NewFD->isInvalidDecl()) | ||||||
9476 | D.setRedeclaration(CheckFunctionDeclaration(S, NewFD, Previous, | ||||||
9477 | isMemberSpecialization)); | ||||||
9478 | else if (!Previous.empty()) | ||||||
9479 | // Recover gracefully from an invalid redeclaration. | ||||||
9480 | D.setRedeclaration(true); | ||||||
9481 | } | ||||||
9482 | |||||||
9483 | assert((NewFD->isInvalidDecl() || !D.isRedeclaration() ||(((NewFD->isInvalidDecl() || !D.isRedeclaration() || Previous .getResultKind() != LookupResult::FoundOverloaded) && "previous declaration set still overloaded") ? static_cast< void> (0) : __assert_fail ("(NewFD->isInvalidDecl() || !D.isRedeclaration() || Previous.getResultKind() != LookupResult::FoundOverloaded) && \"previous declaration set still overloaded\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 9485, __PRETTY_FUNCTION__)) | ||||||
9484 | Previous.getResultKind() != LookupResult::FoundOverloaded) &&(((NewFD->isInvalidDecl() || !D.isRedeclaration() || Previous .getResultKind() != LookupResult::FoundOverloaded) && "previous declaration set still overloaded") ? static_cast< void> (0) : __assert_fail ("(NewFD->isInvalidDecl() || !D.isRedeclaration() || Previous.getResultKind() != LookupResult::FoundOverloaded) && \"previous declaration set still overloaded\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 9485, __PRETTY_FUNCTION__)) | ||||||
9485 | "previous declaration set still overloaded")(((NewFD->isInvalidDecl() || !D.isRedeclaration() || Previous .getResultKind() != LookupResult::FoundOverloaded) && "previous declaration set still overloaded") ? static_cast< void> (0) : __assert_fail ("(NewFD->isInvalidDecl() || !D.isRedeclaration() || Previous.getResultKind() != LookupResult::FoundOverloaded) && \"previous declaration set still overloaded\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 9485, __PRETTY_FUNCTION__)); | ||||||
9486 | |||||||
9487 | NamedDecl *PrincipalDecl = (FunctionTemplate | ||||||
9488 | ? cast<NamedDecl>(FunctionTemplate) | ||||||
9489 | : NewFD); | ||||||
9490 | |||||||
9491 | if (isFriend && NewFD->getPreviousDecl()) { | ||||||
9492 | AccessSpecifier Access = AS_public; | ||||||
9493 | if (!NewFD->isInvalidDecl()) | ||||||
9494 | Access = NewFD->getPreviousDecl()->getAccess(); | ||||||
9495 | |||||||
9496 | NewFD->setAccess(Access); | ||||||
9497 | if (FunctionTemplate) FunctionTemplate->setAccess(Access); | ||||||
9498 | } | ||||||
9499 | |||||||
9500 | if (NewFD->isOverloadedOperator() && !DC->isRecord() && | ||||||
9501 | PrincipalDecl->isInIdentifierNamespace(Decl::IDNS_Ordinary)) | ||||||
9502 | PrincipalDecl->setNonMemberOperator(); | ||||||
9503 | |||||||
9504 | // If we have a function template, check the template parameter | ||||||
9505 | // list. This will check and merge default template arguments. | ||||||
9506 | if (FunctionTemplate) { | ||||||
9507 | FunctionTemplateDecl *PrevTemplate = | ||||||
9508 | FunctionTemplate->getPreviousDecl(); | ||||||
9509 | CheckTemplateParameterList(FunctionTemplate->getTemplateParameters(), | ||||||
9510 | PrevTemplate ? PrevTemplate->getTemplateParameters() | ||||||
9511 | : nullptr, | ||||||
9512 | D.getDeclSpec().isFriendSpecified() | ||||||
9513 | ? (D.isFunctionDefinition() | ||||||
9514 | ? TPC_FriendFunctionTemplateDefinition | ||||||
9515 | : TPC_FriendFunctionTemplate) | ||||||
9516 | : (D.getCXXScopeSpec().isSet() && | ||||||
9517 | DC && DC->isRecord() && | ||||||
9518 | DC->isDependentContext()) | ||||||
9519 | ? TPC_ClassTemplateMember | ||||||
9520 | : TPC_FunctionTemplate); | ||||||
9521 | } | ||||||
9522 | |||||||
9523 | if (NewFD->isInvalidDecl()) { | ||||||
9524 | // Ignore all the rest of this. | ||||||
9525 | } else if (!D.isRedeclaration()) { | ||||||
9526 | struct ActOnFDArgs ExtraArgs = { S, D, TemplateParamLists, | ||||||
9527 | AddToScope }; | ||||||
9528 | // Fake up an access specifier if it's supposed to be a class member. | ||||||
9529 | if (isa<CXXRecordDecl>(NewFD->getDeclContext())) | ||||||
9530 | NewFD->setAccess(AS_public); | ||||||
9531 | |||||||
9532 | // Qualified decls generally require a previous declaration. | ||||||
9533 | if (D.getCXXScopeSpec().isSet()) { | ||||||
9534 | // ...with the major exception of templated-scope or | ||||||
9535 | // dependent-scope friend declarations. | ||||||
9536 | |||||||
9537 | // TODO: we currently also suppress this check in dependent | ||||||
9538 | // contexts because (1) the parameter depth will be off when | ||||||
9539 | // matching friend templates and (2) we might actually be | ||||||
9540 | // selecting a friend based on a dependent factor. But there | ||||||
9541 | // are situations where these conditions don't apply and we | ||||||
9542 | // can actually do this check immediately. | ||||||
9543 | // | ||||||
9544 | // Unless the scope is dependent, it's always an error if qualified | ||||||
9545 | // redeclaration lookup found nothing at all. Diagnose that now; | ||||||
9546 | // nothing will diagnose that error later. | ||||||
9547 | if (isFriend && | ||||||
9548 | (D.getCXXScopeSpec().getScopeRep()->isDependent() || | ||||||
9549 | (!Previous.empty() && CurContext->isDependentContext()))) { | ||||||
9550 | // ignore these | ||||||
9551 | } else { | ||||||
9552 | // The user tried to provide an out-of-line definition for a | ||||||
9553 | // function that is a member of a class or namespace, but there | ||||||
9554 | // was no such member function declared (C++ [class.mfct]p2, | ||||||
9555 | // C++ [namespace.memdef]p2). For example: | ||||||
9556 | // | ||||||
9557 | // class X { | ||||||
9558 | // void f() const; | ||||||
9559 | // }; | ||||||
9560 | // | ||||||
9561 | // void X::f() { } // ill-formed | ||||||
9562 | // | ||||||
9563 | // Complain about this problem, and attempt to suggest close | ||||||
9564 | // matches (e.g., those that differ only in cv-qualifiers and | ||||||
9565 | // whether the parameter types are references). | ||||||
9566 | |||||||
9567 | if (NamedDecl *Result = DiagnoseInvalidRedeclaration( | ||||||
9568 | *this, Previous, NewFD, ExtraArgs, false, nullptr)) { | ||||||
9569 | AddToScope = ExtraArgs.AddToScope; | ||||||
9570 | return Result; | ||||||
9571 | } | ||||||
9572 | } | ||||||
9573 | |||||||
9574 | // Unqualified local friend declarations are required to resolve | ||||||
9575 | // to something. | ||||||
9576 | } else if (isFriend && cast<CXXRecordDecl>(CurContext)->isLocalClass()) { | ||||||
9577 | if (NamedDecl *Result = DiagnoseInvalidRedeclaration( | ||||||
9578 | *this, Previous, NewFD, ExtraArgs, true, S)) { | ||||||
9579 | AddToScope = ExtraArgs.AddToScope; | ||||||
9580 | return Result; | ||||||
9581 | } | ||||||
9582 | } | ||||||
9583 | } else if (!D.isFunctionDefinition() && | ||||||
9584 | isa<CXXMethodDecl>(NewFD) && NewFD->isOutOfLine() && | ||||||
9585 | !isFriend && !isFunctionTemplateSpecialization && | ||||||
9586 | !isMemberSpecialization) { | ||||||
9587 | // An out-of-line member function declaration must also be a | ||||||
9588 | // definition (C++ [class.mfct]p2). | ||||||
9589 | // Note that this is not the case for explicit specializations of | ||||||
9590 | // function templates or member functions of class templates, per | ||||||
9591 | // C++ [temp.expl.spec]p2. We also allow these declarations as an | ||||||
9592 | // extension for compatibility with old SWIG code which likes to | ||||||
9593 | // generate them. | ||||||
9594 | Diag(NewFD->getLocation(), diag::ext_out_of_line_declaration) | ||||||
9595 | << D.getCXXScopeSpec().getRange(); | ||||||
9596 | } | ||||||
9597 | } | ||||||
9598 | |||||||
9599 | ProcessPragmaWeak(S, NewFD); | ||||||
9600 | checkAttributesAfterMerging(*this, *NewFD); | ||||||
9601 | |||||||
9602 | AddKnownFunctionAttributes(NewFD); | ||||||
9603 | |||||||
9604 | if (NewFD->hasAttr<OverloadableAttr>() && | ||||||
9605 | !NewFD->getType()->getAs<FunctionProtoType>()) { | ||||||
9606 | Diag(NewFD->getLocation(), | ||||||
9607 | diag::err_attribute_overloadable_no_prototype) | ||||||
9608 | << NewFD; | ||||||
9609 | |||||||
9610 | // Turn this into a variadic function with no parameters. | ||||||
9611 | const FunctionType *FT = NewFD->getType()->getAs<FunctionType>(); | ||||||
9612 | FunctionProtoType::ExtProtoInfo EPI( | ||||||
9613 | Context.getDefaultCallingConvention(true, false)); | ||||||
9614 | EPI.Variadic = true; | ||||||
9615 | EPI.ExtInfo = FT->getExtInfo(); | ||||||
9616 | |||||||
9617 | QualType R = Context.getFunctionType(FT->getReturnType(), None, EPI); | ||||||
9618 | NewFD->setType(R); | ||||||
9619 | } | ||||||
9620 | |||||||
9621 | // If there's a #pragma GCC visibility in scope, and this isn't a class | ||||||
9622 | // member, set the visibility of this function. | ||||||
9623 | if (!DC->isRecord() && NewFD->isExternallyVisible()) | ||||||
9624 | AddPushedVisibilityAttribute(NewFD); | ||||||
9625 | |||||||
9626 | // If there's a #pragma clang arc_cf_code_audited in scope, consider | ||||||
9627 | // marking the function. | ||||||
9628 | AddCFAuditedAttribute(NewFD); | ||||||
9629 | |||||||
9630 | // If this is a function definition, check if we have to apply optnone due to | ||||||
9631 | // a pragma. | ||||||
9632 | if(D.isFunctionDefinition()) | ||||||
9633 | AddRangeBasedOptnone(NewFD); | ||||||
9634 | |||||||
9635 | // If this is the first declaration of an extern C variable, update | ||||||
9636 | // the map of such variables. | ||||||
9637 | if (NewFD->isFirstDecl() && !NewFD->isInvalidDecl() && | ||||||
9638 | isIncompleteDeclExternC(*this, NewFD)) | ||||||
9639 | RegisterLocallyScopedExternCDecl(NewFD, S); | ||||||
9640 | |||||||
9641 | // Set this FunctionDecl's range up to the right paren. | ||||||
9642 | NewFD->setRangeEnd(D.getSourceRange().getEnd()); | ||||||
9643 | |||||||
9644 | if (D.isRedeclaration() && !Previous.empty()) { | ||||||
9645 | NamedDecl *Prev = Previous.getRepresentativeDecl(); | ||||||
9646 | checkDLLAttributeRedeclaration(*this, Prev, NewFD, | ||||||
9647 | isMemberSpecialization || | ||||||
9648 | isFunctionTemplateSpecialization, | ||||||
9649 | D.isFunctionDefinition()); | ||||||
9650 | } | ||||||
9651 | |||||||
9652 | if (getLangOpts().CUDA) { | ||||||
9653 | IdentifierInfo *II = NewFD->getIdentifier(); | ||||||
9654 | if (II && II->isStr(getCudaConfigureFuncName()) && | ||||||
9655 | !NewFD->isInvalidDecl() && | ||||||
9656 | NewFD->getDeclContext()->getRedeclContext()->isTranslationUnit()) { | ||||||
9657 | if (!R->getAs<FunctionType>()->getReturnType()->isScalarType()) | ||||||
9658 | Diag(NewFD->getLocation(), diag::err_config_scalar_return) | ||||||
9659 | << getCudaConfigureFuncName(); | ||||||
9660 | Context.setcudaConfigureCallDecl(NewFD); | ||||||
9661 | } | ||||||
9662 | |||||||
9663 | // Variadic functions, other than a *declaration* of printf, are not allowed | ||||||
9664 | // in device-side CUDA code, unless someone passed | ||||||
9665 | // -fcuda-allow-variadic-functions. | ||||||
9666 | if (!getLangOpts().CUDAAllowVariadicFunctions && NewFD->isVariadic() && | ||||||
9667 | (NewFD->hasAttr<CUDADeviceAttr>() || | ||||||
9668 | NewFD->hasAttr<CUDAGlobalAttr>()) && | ||||||
9669 | !(II && II->isStr("printf") && NewFD->isExternC() && | ||||||
9670 | !D.isFunctionDefinition())) { | ||||||
9671 | Diag(NewFD->getLocation(), diag::err_variadic_device_fn); | ||||||
9672 | } | ||||||
9673 | } | ||||||
9674 | |||||||
9675 | MarkUnusedFileScopedDecl(NewFD); | ||||||
9676 | |||||||
9677 | |||||||
9678 | |||||||
9679 | if (getLangOpts().OpenCL && NewFD->hasAttr<OpenCLKernelAttr>()) { | ||||||
9680 | // OpenCL v1.2 s6.8 static is invalid for kernel functions. | ||||||
9681 | if ((getLangOpts().OpenCLVersion >= 120) | ||||||
9682 | && (SC == SC_Static)) { | ||||||
9683 | Diag(D.getIdentifierLoc(), diag::err_static_kernel); | ||||||
9684 | D.setInvalidType(); | ||||||
9685 | } | ||||||
9686 | |||||||
9687 | // OpenCL v1.2, s6.9 -- Kernels can only have return type void. | ||||||
9688 | if (!NewFD->getReturnType()->isVoidType()) { | ||||||
9689 | SourceRange RTRange = NewFD->getReturnTypeSourceRange(); | ||||||
9690 | Diag(D.getIdentifierLoc(), diag::err_expected_kernel_void_return_type) | ||||||
9691 | << (RTRange.isValid() ? FixItHint::CreateReplacement(RTRange, "void") | ||||||
9692 | : FixItHint()); | ||||||
9693 | D.setInvalidType(); | ||||||
9694 | } | ||||||
9695 | |||||||
9696 | llvm::SmallPtrSet<const Type *, 16> ValidTypes; | ||||||
9697 | for (auto Param : NewFD->parameters()) | ||||||
9698 | checkIsValidOpenCLKernelParameter(*this, D, Param, ValidTypes); | ||||||
9699 | |||||||
9700 | if (getLangOpts().OpenCLCPlusPlus) { | ||||||
9701 | if (DC->isRecord()) { | ||||||
9702 | Diag(D.getIdentifierLoc(), diag::err_method_kernel); | ||||||
9703 | D.setInvalidType(); | ||||||
9704 | } | ||||||
9705 | if (FunctionTemplate) { | ||||||
9706 | Diag(D.getIdentifierLoc(), diag::err_template_kernel); | ||||||
9707 | D.setInvalidType(); | ||||||
9708 | } | ||||||
9709 | } | ||||||
9710 | } | ||||||
9711 | |||||||
9712 | if (getLangOpts().CPlusPlus) { | ||||||
9713 | if (FunctionTemplate) { | ||||||
9714 | if (NewFD->isInvalidDecl()) | ||||||
9715 | FunctionTemplate->setInvalidDecl(); | ||||||
9716 | return FunctionTemplate; | ||||||
9717 | } | ||||||
9718 | |||||||
9719 | if (isMemberSpecialization && !NewFD->isInvalidDecl()) | ||||||
9720 | CompleteMemberSpecialization(NewFD, Previous); | ||||||
9721 | } | ||||||
9722 | |||||||
9723 | for (const ParmVarDecl *Param : NewFD->parameters()) { | ||||||
9724 | QualType PT = Param->getType(); | ||||||
9725 | |||||||
9726 | // OpenCL 2.0 pipe restrictions forbids pipe packet types to be non-value | ||||||
9727 | // types. | ||||||
9728 | if (getLangOpts().OpenCLVersion >= 200 || getLangOpts().OpenCLCPlusPlus) { | ||||||
9729 | if(const PipeType *PipeTy = PT->getAs<PipeType>()) { | ||||||
9730 | QualType ElemTy = PipeTy->getElementType(); | ||||||
9731 | if (ElemTy->isReferenceType() || ElemTy->isPointerType()) { | ||||||
9732 | Diag(Param->getTypeSpecStartLoc(), diag::err_reference_pipe_type ); | ||||||
9733 | D.setInvalidType(); | ||||||
9734 | } | ||||||
9735 | } | ||||||
9736 | } | ||||||
9737 | } | ||||||
9738 | |||||||
9739 | // Here we have an function template explicit specialization at class scope. | ||||||
9740 | // The actual specialization will be postponed to template instatiation | ||||||
9741 | // time via the ClassScopeFunctionSpecializationDecl node. | ||||||
9742 | if (isDependentClassScopeExplicitSpecialization) { | ||||||
9743 | ClassScopeFunctionSpecializationDecl *NewSpec = | ||||||
9744 | ClassScopeFunctionSpecializationDecl::Create( | ||||||
9745 | Context, CurContext, NewFD->getLocation(), | ||||||
9746 | cast<CXXMethodDecl>(NewFD), | ||||||
9747 | HasExplicitTemplateArgs, TemplateArgs); | ||||||
9748 | CurContext->addDecl(NewSpec); | ||||||
9749 | AddToScope = false; | ||||||
9750 | } | ||||||
9751 | |||||||
9752 | // Diagnose availability attributes. Availability cannot be used on functions | ||||||
9753 | // that are run during load/unload. | ||||||
9754 | if (const auto *attr = NewFD->getAttr<AvailabilityAttr>()) { | ||||||
9755 | if (NewFD->hasAttr<ConstructorAttr>()) { | ||||||
9756 | Diag(attr->getLocation(), diag::warn_availability_on_static_initializer) | ||||||
9757 | << 1; | ||||||
9758 | NewFD->dropAttr<AvailabilityAttr>(); | ||||||
9759 | } | ||||||
9760 | if (NewFD->hasAttr<DestructorAttr>()) { | ||||||
9761 | Diag(attr->getLocation(), diag::warn_availability_on_static_initializer) | ||||||
9762 | << 2; | ||||||
9763 | NewFD->dropAttr<AvailabilityAttr>(); | ||||||
9764 | } | ||||||
9765 | } | ||||||
9766 | |||||||
9767 | // Diagnose no_builtin attribute on function declaration that are not a | ||||||
9768 | // definition. | ||||||
9769 | // FIXME: We should really be doing this in | ||||||
9770 | // SemaDeclAttr.cpp::handleNoBuiltinAttr, unfortunately we only have access to | ||||||
9771 | // the FunctionDecl and at this point of the code | ||||||
9772 | // FunctionDecl::isThisDeclarationADefinition() which always returns `false` | ||||||
9773 | // because Sema::ActOnStartOfFunctionDef has not been called yet. | ||||||
9774 | if (const auto *NBA = NewFD->getAttr<NoBuiltinAttr>()) | ||||||
9775 | switch (D.getFunctionDefinitionKind()) { | ||||||
9776 | case FDK_Defaulted: | ||||||
9777 | case FDK_Deleted: | ||||||
9778 | Diag(NBA->getLocation(), | ||||||
9779 | diag::err_attribute_no_builtin_on_defaulted_deleted_function) | ||||||
9780 | << NBA->getSpelling(); | ||||||
9781 | break; | ||||||
9782 | case FDK_Declaration: | ||||||
9783 | Diag(NBA->getLocation(), diag::err_attribute_no_builtin_on_non_definition) | ||||||
9784 | << NBA->getSpelling(); | ||||||
9785 | break; | ||||||
9786 | case FDK_Definition: | ||||||
9787 | break; | ||||||
9788 | } | ||||||
9789 | |||||||
9790 | return NewFD; | ||||||
9791 | } | ||||||
9792 | |||||||
9793 | /// Return a CodeSegAttr from a containing class. The Microsoft docs say | ||||||
9794 | /// when __declspec(code_seg) "is applied to a class, all member functions of | ||||||
9795 | /// the class and nested classes -- this includes compiler-generated special | ||||||
9796 | /// member functions -- are put in the specified segment." | ||||||
9797 | /// The actual behavior is a little more complicated. The Microsoft compiler | ||||||
9798 | /// won't check outer classes if there is an active value from #pragma code_seg. | ||||||
9799 | /// The CodeSeg is always applied from the direct parent but only from outer | ||||||
9800 | /// classes when the #pragma code_seg stack is empty. See: | ||||||
9801 | /// https://reviews.llvm.org/D22931, the Microsoft feedback page is no longer | ||||||
9802 | /// available since MS has removed the page. | ||||||
9803 | static Attr *getImplicitCodeSegAttrFromClass(Sema &S, const FunctionDecl *FD) { | ||||||
9804 | const auto *Method = dyn_cast<CXXMethodDecl>(FD); | ||||||
9805 | if (!Method) | ||||||
9806 | return nullptr; | ||||||
9807 | const CXXRecordDecl *Parent = Method->getParent(); | ||||||
9808 | if (const auto *SAttr = Parent->getAttr<CodeSegAttr>()) { | ||||||
9809 | Attr *NewAttr = SAttr->clone(S.getASTContext()); | ||||||
9810 | NewAttr->setImplicit(true); | ||||||
9811 | return NewAttr; | ||||||
9812 | } | ||||||
9813 | |||||||
9814 | // The Microsoft compiler won't check outer classes for the CodeSeg | ||||||
9815 | // when the #pragma code_seg stack is active. | ||||||
9816 | if (S.CodeSegStack.CurrentValue) | ||||||
9817 | return nullptr; | ||||||
9818 | |||||||
9819 | while ((Parent = dyn_cast<CXXRecordDecl>(Parent->getParent()))) { | ||||||
9820 | if (const auto *SAttr = Parent->getAttr<CodeSegAttr>()) { | ||||||
9821 | Attr *NewAttr = SAttr->clone(S.getASTContext()); | ||||||
9822 | NewAttr->setImplicit(true); | ||||||
9823 | return NewAttr; | ||||||
9824 | } | ||||||
9825 | } | ||||||
9826 | return nullptr; | ||||||
9827 | } | ||||||
9828 | |||||||
9829 | /// Returns an implicit CodeSegAttr if a __declspec(code_seg) is found on a | ||||||
9830 | /// containing class. Otherwise it will return implicit SectionAttr if the | ||||||
9831 | /// function is a definition and there is an active value on CodeSegStack | ||||||
9832 | /// (from the current #pragma code-seg value). | ||||||
9833 | /// | ||||||
9834 | /// \param FD Function being declared. | ||||||
9835 | /// \param IsDefinition Whether it is a definition or just a declarartion. | ||||||
9836 | /// \returns A CodeSegAttr or SectionAttr to apply to the function or | ||||||
9837 | /// nullptr if no attribute should be added. | ||||||
9838 | Attr *Sema::getImplicitCodeSegOrSectionAttrForFunction(const FunctionDecl *FD, | ||||||
9839 | bool IsDefinition) { | ||||||
9840 | if (Attr *A = getImplicitCodeSegAttrFromClass(*this, FD)) | ||||||
9841 | return A; | ||||||
9842 | if (!FD->hasAttr<SectionAttr>() && IsDefinition && | ||||||
9843 | CodeSegStack.CurrentValue) | ||||||
9844 | return SectionAttr::CreateImplicit( | ||||||
9845 | getASTContext(), CodeSegStack.CurrentValue->getString(), | ||||||
9846 | CodeSegStack.CurrentPragmaLocation, AttributeCommonInfo::AS_Pragma, | ||||||
9847 | SectionAttr::Declspec_allocate); | ||||||
9848 | return nullptr; | ||||||
9849 | } | ||||||
9850 | |||||||
9851 | /// Determines if we can perform a correct type check for \p D as a | ||||||
9852 | /// redeclaration of \p PrevDecl. If not, we can generally still perform a | ||||||
9853 | /// best-effort check. | ||||||
9854 | /// | ||||||
9855 | /// \param NewD The new declaration. | ||||||
9856 | /// \param OldD The old declaration. | ||||||
9857 | /// \param NewT The portion of the type of the new declaration to check. | ||||||
9858 | /// \param OldT The portion of the type of the old declaration to check. | ||||||
9859 | bool Sema::canFullyTypeCheckRedeclaration(ValueDecl *NewD, ValueDecl *OldD, | ||||||
9860 | QualType NewT, QualType OldT) { | ||||||
9861 | if (!NewD->getLexicalDeclContext()->isDependentContext()) | ||||||
9862 | return true; | ||||||
9863 | |||||||
9864 | // For dependently-typed local extern declarations and friends, we can't | ||||||
9865 | // perform a correct type check in general until instantiation: | ||||||
9866 | // | ||||||
9867 | // int f(); | ||||||
9868 | // template<typename T> void g() { T f(); } | ||||||
9869 | // | ||||||
9870 | // (valid if g() is only instantiated with T = int). | ||||||
9871 | if (NewT->isDependentType() && | ||||||
9872 | (NewD->isLocalExternDecl() || NewD->getFriendObjectKind())) | ||||||
9873 | return false; | ||||||
9874 | |||||||
9875 | // Similarly, if the previous declaration was a dependent local extern | ||||||
9876 | // declaration, we don't really know its type yet. | ||||||
9877 | if (OldT->isDependentType() && OldD->isLocalExternDecl()) | ||||||
9878 | return false; | ||||||
9879 | |||||||
9880 | return true; | ||||||
9881 | } | ||||||
9882 | |||||||
9883 | /// Checks if the new declaration declared in dependent context must be | ||||||
9884 | /// put in the same redeclaration chain as the specified declaration. | ||||||
9885 | /// | ||||||
9886 | /// \param D Declaration that is checked. | ||||||
9887 | /// \param PrevDecl Previous declaration found with proper lookup method for the | ||||||
9888 | /// same declaration name. | ||||||
9889 | /// \returns True if D must be added to the redeclaration chain which PrevDecl | ||||||
9890 | /// belongs to. | ||||||
9891 | /// | ||||||
9892 | bool Sema::shouldLinkDependentDeclWithPrevious(Decl *D, Decl *PrevDecl) { | ||||||
9893 | if (!D->getLexicalDeclContext()->isDependentContext()) | ||||||
9894 | return true; | ||||||
9895 | |||||||
9896 | // Don't chain dependent friend function definitions until instantiation, to | ||||||
9897 | // permit cases like | ||||||
9898 | // | ||||||
9899 | // void func(); | ||||||
9900 | // template<typename T> class C1 { friend void func() {} }; | ||||||
9901 | // template<typename T> class C2 { friend void func() {} }; | ||||||
9902 | // | ||||||
9903 | // ... which is valid if only one of C1 and C2 is ever instantiated. | ||||||
9904 | // | ||||||
9905 | // FIXME: This need only apply to function definitions. For now, we proxy | ||||||
9906 | // this by checking for a file-scope function. We do not want this to apply | ||||||
9907 | // to friend declarations nominating member functions, because that gets in | ||||||
9908 | // the way of access checks. | ||||||
9909 | if (D->getFriendObjectKind() && D->getDeclContext()->isFileContext()) | ||||||
9910 | return false; | ||||||
9911 | |||||||
9912 | auto *VD = dyn_cast<ValueDecl>(D); | ||||||
9913 | auto *PrevVD = dyn_cast<ValueDecl>(PrevDecl); | ||||||
9914 | return !VD || !PrevVD || | ||||||
9915 | canFullyTypeCheckRedeclaration(VD, PrevVD, VD->getType(), | ||||||
9916 | PrevVD->getType()); | ||||||
9917 | } | ||||||
9918 | |||||||
9919 | /// Check the target attribute of the function for MultiVersion | ||||||
9920 | /// validity. | ||||||
9921 | /// | ||||||
9922 | /// Returns true if there was an error, false otherwise. | ||||||
9923 | static bool CheckMultiVersionValue(Sema &S, const FunctionDecl *FD) { | ||||||
9924 | const auto *TA = FD->getAttr<TargetAttr>(); | ||||||
9925 | assert(TA && "MultiVersion Candidate requires a target attribute")((TA && "MultiVersion Candidate requires a target attribute" ) ? static_cast<void> (0) : __assert_fail ("TA && \"MultiVersion Candidate requires a target attribute\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 9925, __PRETTY_FUNCTION__)); | ||||||
9926 | ParsedTargetAttr ParseInfo = TA->parse(); | ||||||
9927 | const TargetInfo &TargetInfo = S.Context.getTargetInfo(); | ||||||
9928 | enum ErrType { Feature = 0, Architecture = 1 }; | ||||||
9929 | |||||||
9930 | if (!ParseInfo.Architecture.empty() && | ||||||
9931 | !TargetInfo.validateCpuIs(ParseInfo.Architecture)) { | ||||||
9932 | S.Diag(FD->getLocation(), diag::err_bad_multiversion_option) | ||||||
9933 | << Architecture << ParseInfo.Architecture; | ||||||
9934 | return true; | ||||||
9935 | } | ||||||
9936 | |||||||
9937 | for (const auto &Feat : ParseInfo.Features) { | ||||||
9938 | auto BareFeat = StringRef{Feat}.substr(1); | ||||||
9939 | if (Feat[0] == '-') { | ||||||
9940 | S.Diag(FD->getLocation(), diag::err_bad_multiversion_option) | ||||||
9941 | << Feature << ("no-" + BareFeat).str(); | ||||||
9942 | return true; | ||||||
9943 | } | ||||||
9944 | |||||||
9945 | if (!TargetInfo.validateCpuSupports(BareFeat) || | ||||||
9946 | !TargetInfo.isValidFeatureName(BareFeat)) { | ||||||
9947 | S.Diag(FD->getLocation(), diag::err_bad_multiversion_option) | ||||||
9948 | << Feature << BareFeat; | ||||||
9949 | return true; | ||||||
9950 | } | ||||||
9951 | } | ||||||
9952 | return false; | ||||||
9953 | } | ||||||
9954 | |||||||
9955 | static bool HasNonMultiVersionAttributes(const FunctionDecl *FD, | ||||||
9956 | MultiVersionKind MVType) { | ||||||
9957 | for (const Attr *A : FD->attrs()) { | ||||||
9958 | switch (A->getKind()) { | ||||||
9959 | case attr::CPUDispatch: | ||||||
9960 | case attr::CPUSpecific: | ||||||
9961 | if (MVType != MultiVersionKind::CPUDispatch && | ||||||
9962 | MVType != MultiVersionKind::CPUSpecific) | ||||||
9963 | return true; | ||||||
9964 | break; | ||||||
9965 | case attr::Target: | ||||||
9966 | if (MVType != MultiVersionKind::Target) | ||||||
9967 | return true; | ||||||
9968 | break; | ||||||
9969 | default: | ||||||
9970 | return true; | ||||||
9971 | } | ||||||
9972 | } | ||||||
9973 | return false; | ||||||
9974 | } | ||||||
9975 | |||||||
9976 | bool Sema::areMultiversionVariantFunctionsCompatible( | ||||||
9977 | const FunctionDecl *OldFD, const FunctionDecl *NewFD, | ||||||
9978 | const PartialDiagnostic &NoProtoDiagID, | ||||||
9979 | const PartialDiagnosticAt &NoteCausedDiagIDAt, | ||||||
9980 | const PartialDiagnosticAt &NoSupportDiagIDAt, | ||||||
9981 | const PartialDiagnosticAt &DiffDiagIDAt, bool TemplatesSupported, | ||||||
9982 | bool ConstexprSupported, bool CLinkageMayDiffer) { | ||||||
9983 | enum DoesntSupport { | ||||||
9984 | FuncTemplates = 0, | ||||||
9985 | VirtFuncs = 1, | ||||||
9986 | DeducedReturn = 2, | ||||||
9987 | Constructors = 3, | ||||||
9988 | Destructors = 4, | ||||||
9989 | DeletedFuncs = 5, | ||||||
9990 | DefaultedFuncs = 6, | ||||||
9991 | ConstexprFuncs = 7, | ||||||
9992 | ConstevalFuncs = 8, | ||||||
9993 | }; | ||||||
9994 | enum Different { | ||||||
9995 | CallingConv = 0, | ||||||
9996 | ReturnType = 1, | ||||||
9997 | ConstexprSpec = 2, | ||||||
9998 | InlineSpec = 3, | ||||||
9999 | StorageClass = 4, | ||||||
10000 | Linkage = 5, | ||||||
10001 | }; | ||||||
10002 | |||||||
10003 | if (NoProtoDiagID.getDiagID() != 0 && OldFD && | ||||||
10004 | !OldFD->getType()->getAs<FunctionProtoType>()) { | ||||||
10005 | Diag(OldFD->getLocation(), NoProtoDiagID); | ||||||
10006 | Diag(NoteCausedDiagIDAt.first, NoteCausedDiagIDAt.second); | ||||||
10007 | return true; | ||||||
10008 | } | ||||||
10009 | |||||||
10010 | if (NoProtoDiagID.getDiagID() != 0 && | ||||||
10011 | !NewFD->getType()->getAs<FunctionProtoType>()) | ||||||
10012 | return Diag(NewFD->getLocation(), NoProtoDiagID); | ||||||
10013 | |||||||
10014 | if (!TemplatesSupported && | ||||||
10015 | NewFD->getTemplatedKind() == FunctionDecl::TK_FunctionTemplate) | ||||||
10016 | return Diag(NoSupportDiagIDAt.first, NoSupportDiagIDAt.second) | ||||||
10017 | << FuncTemplates; | ||||||
10018 | |||||||
10019 | if (const auto *NewCXXFD = dyn_cast<CXXMethodDecl>(NewFD)) { | ||||||
10020 | if (NewCXXFD->isVirtual()) | ||||||
10021 | return Diag(NoSupportDiagIDAt.first, NoSupportDiagIDAt.second) | ||||||
10022 | << VirtFuncs; | ||||||
10023 | |||||||
10024 | if (isa<CXXConstructorDecl>(NewCXXFD)) | ||||||
10025 | return Diag(NoSupportDiagIDAt.first, NoSupportDiagIDAt.second) | ||||||
10026 | << Constructors; | ||||||
10027 | |||||||
10028 | if (isa<CXXDestructorDecl>(NewCXXFD)) | ||||||
10029 | return Diag(NoSupportDiagIDAt.first, NoSupportDiagIDAt.second) | ||||||
10030 | << Destructors; | ||||||
10031 | } | ||||||
10032 | |||||||
10033 | if (NewFD->isDeleted()) | ||||||
10034 | return Diag(NoSupportDiagIDAt.first, NoSupportDiagIDAt.second) | ||||||
10035 | << DeletedFuncs; | ||||||
10036 | |||||||
10037 | if (NewFD->isDefaulted()) | ||||||
10038 | return Diag(NoSupportDiagIDAt.first, NoSupportDiagIDAt.second) | ||||||
10039 | << DefaultedFuncs; | ||||||
10040 | |||||||
10041 | if (!ConstexprSupported && NewFD->isConstexpr()) | ||||||
10042 | return Diag(NoSupportDiagIDAt.first, NoSupportDiagIDAt.second) | ||||||
10043 | << (NewFD->isConsteval() ? ConstevalFuncs : ConstexprFuncs); | ||||||
10044 | |||||||
10045 | QualType NewQType = Context.getCanonicalType(NewFD->getType()); | ||||||
10046 | const auto *NewType = cast<FunctionType>(NewQType); | ||||||
10047 | QualType NewReturnType = NewType->getReturnType(); | ||||||
10048 | |||||||
10049 | if (NewReturnType->isUndeducedType()) | ||||||
10050 | return Diag(NoSupportDiagIDAt.first, NoSupportDiagIDAt.second) | ||||||
10051 | << DeducedReturn; | ||||||
10052 | |||||||
10053 | // Ensure the return type is identical. | ||||||
10054 | if (OldFD) { | ||||||
10055 | QualType OldQType = Context.getCanonicalType(OldFD->getType()); | ||||||
10056 | const auto *OldType = cast<FunctionType>(OldQType); | ||||||
10057 | FunctionType::ExtInfo OldTypeInfo = OldType->getExtInfo(); | ||||||
10058 | FunctionType::ExtInfo NewTypeInfo = NewType->getExtInfo(); | ||||||
10059 | |||||||
10060 | if (OldTypeInfo.getCC() != NewTypeInfo.getCC()) | ||||||
10061 | return Diag(DiffDiagIDAt.first, DiffDiagIDAt.second) << CallingConv; | ||||||
10062 | |||||||
10063 | QualType OldReturnType = OldType->getReturnType(); | ||||||
10064 | |||||||
10065 | if (OldReturnType != NewReturnType) | ||||||
10066 | return Diag(DiffDiagIDAt.first, DiffDiagIDAt.second) << ReturnType; | ||||||
10067 | |||||||
10068 | if (OldFD->getConstexprKind() != NewFD->getConstexprKind()) | ||||||
10069 | return Diag(DiffDiagIDAt.first, DiffDiagIDAt.second) << ConstexprSpec; | ||||||
10070 | |||||||
10071 | if (OldFD->isInlineSpecified() != NewFD->isInlineSpecified()) | ||||||
10072 | return Diag(DiffDiagIDAt.first, DiffDiagIDAt.second) << InlineSpec; | ||||||
10073 | |||||||
10074 | if (OldFD->getStorageClass() != NewFD->getStorageClass()) | ||||||
10075 | return Diag(DiffDiagIDAt.first, DiffDiagIDAt.second) << StorageClass; | ||||||
10076 | |||||||
10077 | if (!CLinkageMayDiffer && OldFD->isExternC() != NewFD->isExternC()) | ||||||
10078 | return Diag(DiffDiagIDAt.first, DiffDiagIDAt.second) << Linkage; | ||||||
10079 | |||||||
10080 | if (CheckEquivalentExceptionSpec( | ||||||
10081 | OldFD->getType()->getAs<FunctionProtoType>(), OldFD->getLocation(), | ||||||
10082 | NewFD->getType()->getAs<FunctionProtoType>(), NewFD->getLocation())) | ||||||
10083 | return true; | ||||||
10084 | } | ||||||
10085 | return false; | ||||||
10086 | } | ||||||
10087 | |||||||
10088 | static bool CheckMultiVersionAdditionalRules(Sema &S, const FunctionDecl *OldFD, | ||||||
10089 | const FunctionDecl *NewFD, | ||||||
10090 | bool CausesMV, | ||||||
10091 | MultiVersionKind MVType) { | ||||||
10092 | if (!S.getASTContext().getTargetInfo().supportsMultiVersioning()) { | ||||||
10093 | S.Diag(NewFD->getLocation(), diag::err_multiversion_not_supported); | ||||||
10094 | if (OldFD) | ||||||
10095 | S.Diag(OldFD->getLocation(), diag::note_previous_declaration); | ||||||
10096 | return true; | ||||||
10097 | } | ||||||
10098 | |||||||
10099 | bool IsCPUSpecificCPUDispatchMVType = | ||||||
10100 | MVType == MultiVersionKind::CPUDispatch || | ||||||
10101 | MVType == MultiVersionKind::CPUSpecific; | ||||||
10102 | |||||||
10103 | // For now, disallow all other attributes. These should be opt-in, but | ||||||
10104 | // an analysis of all of them is a future FIXME. | ||||||
10105 | if (CausesMV && OldFD && HasNonMultiVersionAttributes(OldFD, MVType)) { | ||||||
10106 | S.Diag(OldFD->getLocation(), diag::err_multiversion_no_other_attrs) | ||||||
10107 | << IsCPUSpecificCPUDispatchMVType; | ||||||
10108 | S.Diag(NewFD->getLocation(), diag::note_multiversioning_caused_here); | ||||||
10109 | return true; | ||||||
10110 | } | ||||||
10111 | |||||||
10112 | if (HasNonMultiVersionAttributes(NewFD, MVType)) | ||||||
10113 | return S.Diag(NewFD->getLocation(), diag::err_multiversion_no_other_attrs) | ||||||
10114 | << IsCPUSpecificCPUDispatchMVType; | ||||||
10115 | |||||||
10116 | // Only allow transition to MultiVersion if it hasn't been used. | ||||||
10117 | if (OldFD && CausesMV && OldFD->isUsed(false)) | ||||||
10118 | return S.Diag(NewFD->getLocation(), diag::err_multiversion_after_used); | ||||||
10119 | |||||||
10120 | return S.areMultiversionVariantFunctionsCompatible( | ||||||
10121 | OldFD, NewFD, S.PDiag(diag::err_multiversion_noproto), | ||||||
10122 | PartialDiagnosticAt(NewFD->getLocation(), | ||||||
10123 | S.PDiag(diag::note_multiversioning_caused_here)), | ||||||
10124 | PartialDiagnosticAt(NewFD->getLocation(), | ||||||
10125 | S.PDiag(diag::err_multiversion_doesnt_support) | ||||||
10126 | << IsCPUSpecificCPUDispatchMVType), | ||||||
10127 | PartialDiagnosticAt(NewFD->getLocation(), | ||||||
10128 | S.PDiag(diag::err_multiversion_diff)), | ||||||
10129 | /*TemplatesSupported=*/false, | ||||||
10130 | /*ConstexprSupported=*/!IsCPUSpecificCPUDispatchMVType, | ||||||
10131 | /*CLinkageMayDiffer=*/false); | ||||||
10132 | } | ||||||
10133 | |||||||
10134 | /// Check the validity of a multiversion function declaration that is the | ||||||
10135 | /// first of its kind. Also sets the multiversion'ness' of the function itself. | ||||||
10136 | /// | ||||||
10137 | /// This sets NewFD->isInvalidDecl() to true if there was an error. | ||||||
10138 | /// | ||||||
10139 | /// Returns true if there was an error, false otherwise. | ||||||
10140 | static bool CheckMultiVersionFirstFunction(Sema &S, FunctionDecl *FD, | ||||||
10141 | MultiVersionKind MVType, | ||||||
10142 | const TargetAttr *TA) { | ||||||
10143 | assert(MVType != MultiVersionKind::None &&((MVType != MultiVersionKind::None && "Function lacks multiversion attribute" ) ? static_cast<void> (0) : __assert_fail ("MVType != MultiVersionKind::None && \"Function lacks multiversion attribute\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 10144, __PRETTY_FUNCTION__)) | ||||||
10144 | "Function lacks multiversion attribute")((MVType != MultiVersionKind::None && "Function lacks multiversion attribute" ) ? static_cast<void> (0) : __assert_fail ("MVType != MultiVersionKind::None && \"Function lacks multiversion attribute\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 10144, __PRETTY_FUNCTION__)); | ||||||
10145 | |||||||
10146 | // Target only causes MV if it is default, otherwise this is a normal | ||||||
10147 | // function. | ||||||
10148 | if (MVType == MultiVersionKind::Target && !TA->isDefaultVersion()) | ||||||
10149 | return false; | ||||||
10150 | |||||||
10151 | if (MVType == MultiVersionKind::Target && CheckMultiVersionValue(S, FD)) { | ||||||
10152 | FD->setInvalidDecl(); | ||||||
10153 | return true; | ||||||
10154 | } | ||||||
10155 | |||||||
10156 | if (CheckMultiVersionAdditionalRules(S, nullptr, FD, true, MVType)) { | ||||||
10157 | FD->setInvalidDecl(); | ||||||
10158 | return true; | ||||||
10159 | } | ||||||
10160 | |||||||
10161 | FD->setIsMultiVersion(); | ||||||
10162 | return false; | ||||||
10163 | } | ||||||
10164 | |||||||
10165 | static bool PreviousDeclsHaveMultiVersionAttribute(const FunctionDecl *FD) { | ||||||
10166 | for (const Decl *D = FD->getPreviousDecl(); D; D = D->getPreviousDecl()) { | ||||||
10167 | if (D->getAsFunction()->getMultiVersionKind() != MultiVersionKind::None) | ||||||
10168 | return true; | ||||||
10169 | } | ||||||
10170 | |||||||
10171 | return false; | ||||||
10172 | } | ||||||
10173 | |||||||
10174 | static bool CheckTargetCausesMultiVersioning( | ||||||
10175 | Sema &S, FunctionDecl *OldFD, FunctionDecl *NewFD, const TargetAttr *NewTA, | ||||||
10176 | bool &Redeclaration, NamedDecl *&OldDecl, bool &MergeTypeWithPrevious, | ||||||
10177 | LookupResult &Previous) { | ||||||
10178 | const auto *OldTA = OldFD->getAttr<TargetAttr>(); | ||||||
10179 | ParsedTargetAttr NewParsed = NewTA->parse(); | ||||||
10180 | // Sort order doesn't matter, it just needs to be consistent. | ||||||
10181 | llvm::sort(NewParsed.Features); | ||||||
10182 | |||||||
10183 | // If the old decl is NOT MultiVersioned yet, and we don't cause that | ||||||
10184 | // to change, this is a simple redeclaration. | ||||||
10185 | if (!NewTA->isDefaultVersion() && | ||||||
10186 | (!OldTA || OldTA->getFeaturesStr() == NewTA->getFeaturesStr())) | ||||||
10187 | return false; | ||||||
10188 | |||||||
10189 | // Otherwise, this decl causes MultiVersioning. | ||||||
10190 | if (!S.getASTContext().getTargetInfo().supportsMultiVersioning()) { | ||||||
10191 | S.Diag(NewFD->getLocation(), diag::err_multiversion_not_supported); | ||||||
10192 | S.Diag(OldFD->getLocation(), diag::note_previous_declaration); | ||||||
10193 | NewFD->setInvalidDecl(); | ||||||
10194 | return true; | ||||||
10195 | } | ||||||
10196 | |||||||
10197 | if (CheckMultiVersionAdditionalRules(S, OldFD, NewFD, true, | ||||||
10198 | MultiVersionKind::Target)) { | ||||||
10199 | NewFD->setInvalidDecl(); | ||||||
10200 | return true; | ||||||
10201 | } | ||||||
10202 | |||||||
10203 | if (CheckMultiVersionValue(S, NewFD)) { | ||||||
10204 | NewFD->setInvalidDecl(); | ||||||
10205 | return true; | ||||||
10206 | } | ||||||
10207 | |||||||
10208 | // If this is 'default', permit the forward declaration. | ||||||
10209 | if (!OldFD->isMultiVersion() && !OldTA && NewTA->isDefaultVersion()) { | ||||||
10210 | Redeclaration = true; | ||||||
10211 | OldDecl = OldFD; | ||||||
10212 | OldFD->setIsMultiVersion(); | ||||||
10213 | NewFD->setIsMultiVersion(); | ||||||
10214 | return false; | ||||||
10215 | } | ||||||
10216 | |||||||
10217 | if (CheckMultiVersionValue(S, OldFD)) { | ||||||
10218 | S.Diag(NewFD->getLocation(), diag::note_multiversioning_caused_here); | ||||||
10219 | NewFD->setInvalidDecl(); | ||||||
10220 | return true; | ||||||
10221 | } | ||||||
10222 | |||||||
10223 | ParsedTargetAttr OldParsed = OldTA->parse(std::less<std::string>()); | ||||||
10224 | |||||||
10225 | if (OldParsed == NewParsed) { | ||||||
10226 | S.Diag(NewFD->getLocation(), diag::err_multiversion_duplicate); | ||||||
10227 | S.Diag(OldFD->getLocation(), diag::note_previous_declaration); | ||||||
10228 | NewFD->setInvalidDecl(); | ||||||
10229 | return true; | ||||||
10230 | } | ||||||
10231 | |||||||
10232 | for (const auto *FD : OldFD->redecls()) { | ||||||
10233 | const auto *CurTA = FD->getAttr<TargetAttr>(); | ||||||
10234 | // We allow forward declarations before ANY multiversioning attributes, but | ||||||
10235 | // nothing after the fact. | ||||||
10236 | if (PreviousDeclsHaveMultiVersionAttribute(FD) && | ||||||
10237 | (!CurTA || CurTA->isInherited())) { | ||||||
10238 | S.Diag(FD->getLocation(), diag::err_multiversion_required_in_redecl) | ||||||
10239 | << 0; | ||||||
10240 | S.Diag(NewFD->getLocation(), diag::note_multiversioning_caused_here); | ||||||
10241 | NewFD->setInvalidDecl(); | ||||||
10242 | return true; | ||||||
10243 | } | ||||||
10244 | } | ||||||
10245 | |||||||
10246 | OldFD->setIsMultiVersion(); | ||||||
10247 | NewFD->setIsMultiVersion(); | ||||||
10248 | Redeclaration = false; | ||||||
10249 | MergeTypeWithPrevious = false; | ||||||
10250 | OldDecl = nullptr; | ||||||
10251 | Previous.clear(); | ||||||
10252 | return false; | ||||||
10253 | } | ||||||
10254 | |||||||
10255 | /// Check the validity of a new function declaration being added to an existing | ||||||
10256 | /// multiversioned declaration collection. | ||||||
10257 | static bool CheckMultiVersionAdditionalDecl( | ||||||
10258 | Sema &S, FunctionDecl *OldFD, FunctionDecl *NewFD, | ||||||
10259 | MultiVersionKind NewMVType, const TargetAttr *NewTA, | ||||||
10260 | const CPUDispatchAttr *NewCPUDisp, const CPUSpecificAttr *NewCPUSpec, | ||||||
10261 | bool &Redeclaration, NamedDecl *&OldDecl, bool &MergeTypeWithPrevious, | ||||||
10262 | LookupResult &Previous) { | ||||||
10263 | |||||||
10264 | MultiVersionKind OldMVType = OldFD->getMultiVersionKind(); | ||||||
10265 | // Disallow mixing of multiversioning types. | ||||||
10266 | if ((OldMVType == MultiVersionKind::Target && | ||||||
10267 | NewMVType != MultiVersionKind::Target) || | ||||||
10268 | (NewMVType == MultiVersionKind::Target && | ||||||
10269 | OldMVType != MultiVersionKind::Target)) { | ||||||
10270 | S.Diag(NewFD->getLocation(), diag::err_multiversion_types_mixed); | ||||||
10271 | S.Diag(OldFD->getLocation(), diag::note_previous_declaration); | ||||||
10272 | NewFD->setInvalidDecl(); | ||||||
10273 | return true; | ||||||
10274 | } | ||||||
10275 | |||||||
10276 | ParsedTargetAttr NewParsed; | ||||||
10277 | if (NewTA) { | ||||||
10278 | NewParsed = NewTA->parse(); | ||||||
10279 | llvm::sort(NewParsed.Features); | ||||||
10280 | } | ||||||
10281 | |||||||
10282 | bool UseMemberUsingDeclRules = | ||||||
10283 | S.CurContext->isRecord() && !NewFD->getFriendObjectKind(); | ||||||
10284 | |||||||
10285 | // Next, check ALL non-overloads to see if this is a redeclaration of a | ||||||
10286 | // previous member of the MultiVersion set. | ||||||
10287 | for (NamedDecl *ND : Previous) { | ||||||
10288 | FunctionDecl *CurFD = ND->getAsFunction(); | ||||||
10289 | if (!CurFD) | ||||||
10290 | continue; | ||||||
10291 | if (S.IsOverload(NewFD, CurFD, UseMemberUsingDeclRules)) | ||||||
10292 | continue; | ||||||
10293 | |||||||
10294 | if (NewMVType == MultiVersionKind::Target) { | ||||||
10295 | const auto *CurTA = CurFD->getAttr<TargetAttr>(); | ||||||
10296 | if (CurTA->getFeaturesStr() == NewTA->getFeaturesStr()) { | ||||||
10297 | NewFD->setIsMultiVersion(); | ||||||
10298 | Redeclaration = true; | ||||||
10299 | OldDecl = ND; | ||||||
10300 | return false; | ||||||
10301 | } | ||||||
10302 | |||||||
10303 | ParsedTargetAttr CurParsed = CurTA->parse(std::less<std::string>()); | ||||||
10304 | if (CurParsed == NewParsed) { | ||||||
10305 | S.Diag(NewFD->getLocation(), diag::err_multiversion_duplicate); | ||||||
10306 | S.Diag(CurFD->getLocation(), diag::note_previous_declaration); | ||||||
10307 | NewFD->setInvalidDecl(); | ||||||
10308 | return true; | ||||||
10309 | } | ||||||
10310 | } else { | ||||||
10311 | const auto *CurCPUSpec = CurFD->getAttr<CPUSpecificAttr>(); | ||||||
10312 | const auto *CurCPUDisp = CurFD->getAttr<CPUDispatchAttr>(); | ||||||
10313 | // Handle CPUDispatch/CPUSpecific versions. | ||||||
10314 | // Only 1 CPUDispatch function is allowed, this will make it go through | ||||||
10315 | // the redeclaration errors. | ||||||
10316 | if (NewMVType == MultiVersionKind::CPUDispatch && | ||||||
10317 | CurFD->hasAttr<CPUDispatchAttr>()) { | ||||||
10318 | if (CurCPUDisp->cpus_size() == NewCPUDisp->cpus_size() && | ||||||
10319 | std::equal( | ||||||
10320 | CurCPUDisp->cpus_begin(), CurCPUDisp->cpus_end(), | ||||||
10321 | NewCPUDisp->cpus_begin(), | ||||||
10322 | [](const IdentifierInfo *Cur, const IdentifierInfo *New) { | ||||||
10323 | return Cur->getName() == New->getName(); | ||||||
10324 | })) { | ||||||
10325 | NewFD->setIsMultiVersion(); | ||||||
10326 | Redeclaration = true; | ||||||
10327 | OldDecl = ND; | ||||||
10328 | return false; | ||||||
10329 | } | ||||||
10330 | |||||||
10331 | // If the declarations don't match, this is an error condition. | ||||||
10332 | S.Diag(NewFD->getLocation(), diag::err_cpu_dispatch_mismatch); | ||||||
10333 | S.Diag(CurFD->getLocation(), diag::note_previous_declaration); | ||||||
10334 | NewFD->setInvalidDecl(); | ||||||
10335 | return true; | ||||||
10336 | } | ||||||
10337 | if (NewMVType == MultiVersionKind::CPUSpecific && CurCPUSpec) { | ||||||
10338 | |||||||
10339 | if (CurCPUSpec->cpus_size() == NewCPUSpec->cpus_size() && | ||||||
10340 | std::equal( | ||||||
10341 | CurCPUSpec->cpus_begin(), CurCPUSpec->cpus_end(), | ||||||
10342 | NewCPUSpec->cpus_begin(), | ||||||
10343 | [](const IdentifierInfo *Cur, const IdentifierInfo *New) { | ||||||
10344 | return Cur->getName() == New->getName(); | ||||||
10345 | })) { | ||||||
10346 | NewFD->setIsMultiVersion(); | ||||||
10347 | Redeclaration = true; | ||||||
10348 | OldDecl = ND; | ||||||
10349 | return false; | ||||||
10350 | } | ||||||
10351 | |||||||
10352 | // Only 1 version of CPUSpecific is allowed for each CPU. | ||||||
10353 | for (const IdentifierInfo *CurII : CurCPUSpec->cpus()) { | ||||||
10354 | for (const IdentifierInfo *NewII : NewCPUSpec->cpus()) { | ||||||
10355 | if (CurII == NewII) { | ||||||
10356 | S.Diag(NewFD->getLocation(), diag::err_cpu_specific_multiple_defs) | ||||||
10357 | << NewII; | ||||||
10358 | S.Diag(CurFD->getLocation(), diag::note_previous_declaration); | ||||||
10359 | NewFD->setInvalidDecl(); | ||||||
10360 | return true; | ||||||
10361 | } | ||||||
10362 | } | ||||||
10363 | } | ||||||
10364 | } | ||||||
10365 | // If the two decls aren't the same MVType, there is no possible error | ||||||
10366 | // condition. | ||||||
10367 | } | ||||||
10368 | } | ||||||
10369 | |||||||
10370 | // Else, this is simply a non-redecl case. Checking the 'value' is only | ||||||
10371 | // necessary in the Target case, since The CPUSpecific/Dispatch cases are | ||||||
10372 | // handled in the attribute adding step. | ||||||
10373 | if (NewMVType == MultiVersionKind::Target && | ||||||
10374 | CheckMultiVersionValue(S, NewFD)) { | ||||||
10375 | NewFD->setInvalidDecl(); | ||||||
10376 | return true; | ||||||
10377 | } | ||||||
10378 | |||||||
10379 | if (CheckMultiVersionAdditionalRules(S, OldFD, NewFD, | ||||||
10380 | !OldFD->isMultiVersion(), NewMVType)) { | ||||||
10381 | NewFD->setInvalidDecl(); | ||||||
10382 | return true; | ||||||
10383 | } | ||||||
10384 | |||||||
10385 | // Permit forward declarations in the case where these two are compatible. | ||||||
10386 | if (!OldFD->isMultiVersion()) { | ||||||
10387 | OldFD->setIsMultiVersion(); | ||||||
10388 | NewFD->setIsMultiVersion(); | ||||||
10389 | Redeclaration = true; | ||||||
10390 | OldDecl = OldFD; | ||||||
10391 | return false; | ||||||
10392 | } | ||||||
10393 | |||||||
10394 | NewFD->setIsMultiVersion(); | ||||||
10395 | Redeclaration = false; | ||||||
10396 | MergeTypeWithPrevious = false; | ||||||
10397 | OldDecl = nullptr; | ||||||
10398 | Previous.clear(); | ||||||
10399 | return false; | ||||||
10400 | } | ||||||
10401 | |||||||
10402 | |||||||
10403 | /// Check the validity of a mulitversion function declaration. | ||||||
10404 | /// Also sets the multiversion'ness' of the function itself. | ||||||
10405 | /// | ||||||
10406 | /// This sets NewFD->isInvalidDecl() to true if there was an error. | ||||||
10407 | /// | ||||||
10408 | /// Returns true if there was an error, false otherwise. | ||||||
10409 | static bool CheckMultiVersionFunction(Sema &S, FunctionDecl *NewFD, | ||||||
10410 | bool &Redeclaration, NamedDecl *&OldDecl, | ||||||
10411 | bool &MergeTypeWithPrevious, | ||||||
10412 | LookupResult &Previous) { | ||||||
10413 | const auto *NewTA = NewFD->getAttr<TargetAttr>(); | ||||||
10414 | const auto *NewCPUDisp = NewFD->getAttr<CPUDispatchAttr>(); | ||||||
10415 | const auto *NewCPUSpec = NewFD->getAttr<CPUSpecificAttr>(); | ||||||
10416 | |||||||
10417 | // Mixing Multiversioning types is prohibited. | ||||||
10418 | if ((NewTA && NewCPUDisp) || (NewTA && NewCPUSpec) || | ||||||
10419 | (NewCPUDisp && NewCPUSpec)) { | ||||||
10420 | S.Diag(NewFD->getLocation(), diag::err_multiversion_types_mixed); | ||||||
10421 | NewFD->setInvalidDecl(); | ||||||
10422 | return true; | ||||||
10423 | } | ||||||
10424 | |||||||
10425 | MultiVersionKind MVType = NewFD->getMultiVersionKind(); | ||||||
10426 | |||||||
10427 | // Main isn't allowed to become a multiversion function, however it IS | ||||||
10428 | // permitted to have 'main' be marked with the 'target' optimization hint. | ||||||
10429 | if (NewFD->isMain()) { | ||||||
10430 | if ((MVType == MultiVersionKind::Target && NewTA->isDefaultVersion()) || | ||||||
10431 | MVType == MultiVersionKind::CPUDispatch || | ||||||
10432 | MVType == MultiVersionKind::CPUSpecific) { | ||||||
10433 | S.Diag(NewFD->getLocation(), diag::err_multiversion_not_allowed_on_main); | ||||||
10434 | NewFD->setInvalidDecl(); | ||||||
10435 | return true; | ||||||
10436 | } | ||||||
10437 | return false; | ||||||
10438 | } | ||||||
10439 | |||||||
10440 | if (!OldDecl || !OldDecl->getAsFunction() || | ||||||
10441 | OldDecl->getDeclContext()->getRedeclContext() != | ||||||
10442 | NewFD->getDeclContext()->getRedeclContext()) { | ||||||
10443 | // If there's no previous declaration, AND this isn't attempting to cause | ||||||
10444 | // multiversioning, this isn't an error condition. | ||||||
10445 | if (MVType == MultiVersionKind::None) | ||||||
10446 | return false; | ||||||
10447 | return CheckMultiVersionFirstFunction(S, NewFD, MVType, NewTA); | ||||||
10448 | } | ||||||
10449 | |||||||
10450 | FunctionDecl *OldFD = OldDecl->getAsFunction(); | ||||||
10451 | |||||||
10452 | if (!OldFD->isMultiVersion() && MVType == MultiVersionKind::None) | ||||||
10453 | return false; | ||||||
10454 | |||||||
10455 | if (OldFD->isMultiVersion() && MVType == MultiVersionKind::None) { | ||||||
10456 | S.Diag(NewFD->getLocation(), diag::err_multiversion_required_in_redecl) | ||||||
10457 | << (OldFD->getMultiVersionKind() != MultiVersionKind::Target); | ||||||
10458 | NewFD->setInvalidDecl(); | ||||||
10459 | return true; | ||||||
10460 | } | ||||||
10461 | |||||||
10462 | // Handle the target potentially causes multiversioning case. | ||||||
10463 | if (!OldFD->isMultiVersion() && MVType == MultiVersionKind::Target) | ||||||
10464 | return CheckTargetCausesMultiVersioning(S, OldFD, NewFD, NewTA, | ||||||
10465 | Redeclaration, OldDecl, | ||||||
10466 | MergeTypeWithPrevious, Previous); | ||||||
10467 | |||||||
10468 | // At this point, we have a multiversion function decl (in OldFD) AND an | ||||||
10469 | // appropriate attribute in the current function decl. Resolve that these are | ||||||
10470 | // still compatible with previous declarations. | ||||||
10471 | return CheckMultiVersionAdditionalDecl( | ||||||
10472 | S, OldFD, NewFD, MVType, NewTA, NewCPUDisp, NewCPUSpec, Redeclaration, | ||||||
10473 | OldDecl, MergeTypeWithPrevious, Previous); | ||||||
10474 | } | ||||||
10475 | |||||||
10476 | /// Perform semantic checking of a new function declaration. | ||||||
10477 | /// | ||||||
10478 | /// Performs semantic analysis of the new function declaration | ||||||
10479 | /// NewFD. This routine performs all semantic checking that does not | ||||||
10480 | /// require the actual declarator involved in the declaration, and is | ||||||
10481 | /// used both for the declaration of functions as they are parsed | ||||||
10482 | /// (called via ActOnDeclarator) and for the declaration of functions | ||||||
10483 | /// that have been instantiated via C++ template instantiation (called | ||||||
10484 | /// via InstantiateDecl). | ||||||
10485 | /// | ||||||
10486 | /// \param IsMemberSpecialization whether this new function declaration is | ||||||
10487 | /// a member specialization (that replaces any definition provided by the | ||||||
10488 | /// previous declaration). | ||||||
10489 | /// | ||||||
10490 | /// This sets NewFD->isInvalidDecl() to true if there was an error. | ||||||
10491 | /// | ||||||
10492 | /// \returns true if the function declaration is a redeclaration. | ||||||
10493 | bool Sema::CheckFunctionDeclaration(Scope *S, FunctionDecl *NewFD, | ||||||
10494 | LookupResult &Previous, | ||||||
10495 | bool IsMemberSpecialization) { | ||||||
10496 | assert(!NewFD->getReturnType()->isVariablyModifiedType() &&((!NewFD->getReturnType()->isVariablyModifiedType() && "Variably modified return types are not handled here") ? static_cast <void> (0) : __assert_fail ("!NewFD->getReturnType()->isVariablyModifiedType() && \"Variably modified return types are not handled here\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 10497, __PRETTY_FUNCTION__)) | ||||||
10497 | "Variably modified return types are not handled here")((!NewFD->getReturnType()->isVariablyModifiedType() && "Variably modified return types are not handled here") ? static_cast <void> (0) : __assert_fail ("!NewFD->getReturnType()->isVariablyModifiedType() && \"Variably modified return types are not handled here\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 10497, __PRETTY_FUNCTION__)); | ||||||
10498 | |||||||
10499 | // Determine whether the type of this function should be merged with | ||||||
10500 | // a previous visible declaration. This never happens for functions in C++, | ||||||
10501 | // and always happens in C if the previous declaration was visible. | ||||||
10502 | bool MergeTypeWithPrevious = !getLangOpts().CPlusPlus && | ||||||
10503 | !Previous.isShadowed(); | ||||||
10504 | |||||||
10505 | bool Redeclaration = false; | ||||||
10506 | NamedDecl *OldDecl = nullptr; | ||||||
10507 | bool MayNeedOverloadableChecks = false; | ||||||
10508 | |||||||
10509 | // Merge or overload the declaration with an existing declaration of | ||||||
10510 | // the same name, if appropriate. | ||||||
10511 | if (!Previous.empty()) { | ||||||
10512 | // Determine whether NewFD is an overload of PrevDecl or | ||||||
10513 | // a declaration that requires merging. If it's an overload, | ||||||
10514 | // there's no more work to do here; we'll just add the new | ||||||
10515 | // function to the scope. | ||||||
10516 | if (!AllowOverloadingOfFunction(Previous, Context, NewFD)) { | ||||||
10517 | NamedDecl *Candidate = Previous.getRepresentativeDecl(); | ||||||
10518 | if (shouldLinkPossiblyHiddenDecl(Candidate, NewFD)) { | ||||||
10519 | Redeclaration = true; | ||||||
10520 | OldDecl = Candidate; | ||||||
10521 | } | ||||||
10522 | } else { | ||||||
10523 | MayNeedOverloadableChecks = true; | ||||||
10524 | switch (CheckOverload(S, NewFD, Previous, OldDecl, | ||||||
10525 | /*NewIsUsingDecl*/ false)) { | ||||||
10526 | case Ovl_Match: | ||||||
10527 | Redeclaration = true; | ||||||
10528 | break; | ||||||
10529 | |||||||
10530 | case Ovl_NonFunction: | ||||||
10531 | Redeclaration = true; | ||||||
10532 | break; | ||||||
10533 | |||||||
10534 | case Ovl_Overload: | ||||||
10535 | Redeclaration = false; | ||||||
10536 | break; | ||||||
10537 | } | ||||||
10538 | } | ||||||
10539 | } | ||||||
10540 | |||||||
10541 | // Check for a previous extern "C" declaration with this name. | ||||||
10542 | if (!Redeclaration && | ||||||
10543 | checkForConflictWithNonVisibleExternC(*this, NewFD, Previous)) { | ||||||
10544 | if (!Previous.empty()) { | ||||||
10545 | // This is an extern "C" declaration with the same name as a previous | ||||||
10546 | // declaration, and thus redeclares that entity... | ||||||
10547 | Redeclaration = true; | ||||||
10548 | OldDecl = Previous.getFoundDecl(); | ||||||
10549 | MergeTypeWithPrevious = false; | ||||||
10550 | |||||||
10551 | // ... except in the presence of __attribute__((overloadable)). | ||||||
10552 | if (OldDecl->hasAttr<OverloadableAttr>() || | ||||||
10553 | NewFD->hasAttr<OverloadableAttr>()) { | ||||||
10554 | if (IsOverload(NewFD, cast<FunctionDecl>(OldDecl), false)) { | ||||||
10555 | MayNeedOverloadableChecks = true; | ||||||
10556 | Redeclaration = false; | ||||||
10557 | OldDecl = nullptr; | ||||||
10558 | } | ||||||
10559 | } | ||||||
10560 | } | ||||||
10561 | } | ||||||
10562 | |||||||
10563 | if (CheckMultiVersionFunction(*this, NewFD, Redeclaration, OldDecl, | ||||||
10564 | MergeTypeWithPrevious, Previous)) | ||||||
10565 | return Redeclaration; | ||||||
10566 | |||||||
10567 | // C++11 [dcl.constexpr]p8: | ||||||
10568 | // A constexpr specifier for a non-static member function that is not | ||||||
10569 | // a constructor declares that member function to be const. | ||||||
10570 | // | ||||||
10571 | // This needs to be delayed until we know whether this is an out-of-line | ||||||
10572 | // definition of a static member function. | ||||||
10573 | // | ||||||
10574 | // This rule is not present in C++1y, so we produce a backwards | ||||||
10575 | // compatibility warning whenever it happens in C++11. | ||||||
10576 | CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(NewFD); | ||||||
10577 | if (!getLangOpts().CPlusPlus14 && MD && MD->isConstexpr() && | ||||||
10578 | !MD->isStatic() && !isa<CXXConstructorDecl>(MD) && | ||||||
10579 | !isa<CXXDestructorDecl>(MD) && !MD->getMethodQualifiers().hasConst()) { | ||||||
10580 | CXXMethodDecl *OldMD = nullptr; | ||||||
10581 | if (OldDecl) | ||||||
10582 | OldMD = dyn_cast_or_null<CXXMethodDecl>(OldDecl->getAsFunction()); | ||||||
10583 | if (!OldMD || !OldMD->isStatic()) { | ||||||
10584 | const FunctionProtoType *FPT = | ||||||
10585 | MD->getType()->castAs<FunctionProtoType>(); | ||||||
10586 | FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); | ||||||
10587 | EPI.TypeQuals.addConst(); | ||||||
10588 | MD->setType(Context.getFunctionType(FPT->getReturnType(), | ||||||
10589 | FPT->getParamTypes(), EPI)); | ||||||
10590 | |||||||
10591 | // Warn that we did this, if we're not performing template instantiation. | ||||||
10592 | // In that case, we'll have warned already when the template was defined. | ||||||
10593 | if (!inTemplateInstantiation()) { | ||||||
10594 | SourceLocation AddConstLoc; | ||||||
10595 | if (FunctionTypeLoc FTL = MD->getTypeSourceInfo()->getTypeLoc() | ||||||
10596 | .IgnoreParens().getAs<FunctionTypeLoc>()) | ||||||
10597 | AddConstLoc = getLocForEndOfToken(FTL.getRParenLoc()); | ||||||
10598 | |||||||
10599 | Diag(MD->getLocation(), diag::warn_cxx14_compat_constexpr_not_const) | ||||||
10600 | << FixItHint::CreateInsertion(AddConstLoc, " const"); | ||||||
10601 | } | ||||||
10602 | } | ||||||
10603 | } | ||||||
10604 | |||||||
10605 | if (Redeclaration) { | ||||||
10606 | // NewFD and OldDecl represent declarations that need to be | ||||||
10607 | // merged. | ||||||
10608 | if (MergeFunctionDecl(NewFD, OldDecl, S, MergeTypeWithPrevious)) { | ||||||
10609 | NewFD->setInvalidDecl(); | ||||||
10610 | return Redeclaration; | ||||||
10611 | } | ||||||
10612 | |||||||
10613 | Previous.clear(); | ||||||
10614 | Previous.addDecl(OldDecl); | ||||||
10615 | |||||||
10616 | if (FunctionTemplateDecl *OldTemplateDecl = | ||||||
10617 | dyn_cast<FunctionTemplateDecl>(OldDecl)) { | ||||||
10618 | auto *OldFD = OldTemplateDecl->getTemplatedDecl(); | ||||||
10619 | FunctionTemplateDecl *NewTemplateDecl | ||||||
10620 | = NewFD->getDescribedFunctionTemplate(); | ||||||
10621 | assert(NewTemplateDecl && "Template/non-template mismatch")((NewTemplateDecl && "Template/non-template mismatch" ) ? static_cast<void> (0) : __assert_fail ("NewTemplateDecl && \"Template/non-template mismatch\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 10621, __PRETTY_FUNCTION__)); | ||||||
10622 | |||||||
10623 | // The call to MergeFunctionDecl above may have created some state in | ||||||
10624 | // NewTemplateDecl that needs to be merged with OldTemplateDecl before we | ||||||
10625 | // can add it as a redeclaration. | ||||||
10626 | NewTemplateDecl->mergePrevDecl(OldTemplateDecl); | ||||||
10627 | |||||||
10628 | NewFD->setPreviousDeclaration(OldFD); | ||||||
10629 | adjustDeclContextForDeclaratorDecl(NewFD, OldFD); | ||||||
10630 | if (NewFD->isCXXClassMember()) { | ||||||
10631 | NewFD->setAccess(OldTemplateDecl->getAccess()); | ||||||
10632 | NewTemplateDecl->setAccess(OldTemplateDecl->getAccess()); | ||||||
10633 | } | ||||||
10634 | |||||||
10635 | // If this is an explicit specialization of a member that is a function | ||||||
10636 | // template, mark it as a member specialization. | ||||||
10637 | if (IsMemberSpecialization && | ||||||
10638 | NewTemplateDecl->getInstantiatedFromMemberTemplate()) { | ||||||
10639 | NewTemplateDecl->setMemberSpecialization(); | ||||||
10640 | assert(OldTemplateDecl->isMemberSpecialization())((OldTemplateDecl->isMemberSpecialization()) ? static_cast <void> (0) : __assert_fail ("OldTemplateDecl->isMemberSpecialization()" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 10640, __PRETTY_FUNCTION__)); | ||||||
10641 | // Explicit specializations of a member template do not inherit deleted | ||||||
10642 | // status from the parent member template that they are specializing. | ||||||
10643 | if (OldFD->isDeleted()) { | ||||||
10644 | // FIXME: This assert will not hold in the presence of modules. | ||||||
10645 | assert(OldFD->getCanonicalDecl() == OldFD)((OldFD->getCanonicalDecl() == OldFD) ? static_cast<void > (0) : __assert_fail ("OldFD->getCanonicalDecl() == OldFD" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 10645, __PRETTY_FUNCTION__)); | ||||||
10646 | // FIXME: We need an update record for this AST mutation. | ||||||
10647 | OldFD->setDeletedAsWritten(false); | ||||||
10648 | } | ||||||
10649 | } | ||||||
10650 | |||||||
10651 | } else { | ||||||
10652 | if (shouldLinkDependentDeclWithPrevious(NewFD, OldDecl)) { | ||||||
10653 | auto *OldFD = cast<FunctionDecl>(OldDecl); | ||||||
10654 | // This needs to happen first so that 'inline' propagates. | ||||||
10655 | NewFD->setPreviousDeclaration(OldFD); | ||||||
10656 | adjustDeclContextForDeclaratorDecl(NewFD, OldFD); | ||||||
10657 | if (NewFD->isCXXClassMember()) | ||||||
10658 | NewFD->setAccess(OldFD->getAccess()); | ||||||
10659 | } | ||||||
10660 | } | ||||||
10661 | } else if (!getLangOpts().CPlusPlus && MayNeedOverloadableChecks && | ||||||
10662 | !NewFD->getAttr<OverloadableAttr>()) { | ||||||
10663 | assert((Previous.empty() ||(((Previous.empty() || llvm::any_of(Previous, [](const NamedDecl *ND) { return ND->hasAttr<OverloadableAttr>(); })) && "Non-redecls shouldn't happen without overloadable present") ? static_cast<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-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 10668, __PRETTY_FUNCTION__)) | ||||||
10664 | llvm::any_of(Previous,(((Previous.empty() || llvm::any_of(Previous, [](const NamedDecl *ND) { return ND->hasAttr<OverloadableAttr>(); })) && "Non-redecls shouldn't happen without overloadable present") ? static_cast<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-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 10668, __PRETTY_FUNCTION__)) | ||||||
10665 | [](const NamedDecl *ND) {(((Previous.empty() || llvm::any_of(Previous, [](const NamedDecl *ND) { return ND->hasAttr<OverloadableAttr>(); })) && "Non-redecls shouldn't happen without overloadable present") ? static_cast<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-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 10668, __PRETTY_FUNCTION__)) | ||||||
10666 | return ND->hasAttr<OverloadableAttr>();(((Previous.empty() || llvm::any_of(Previous, [](const NamedDecl *ND) { return ND->hasAttr<OverloadableAttr>(); })) && "Non-redecls shouldn't happen without overloadable present") ? static_cast<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-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 10668, __PRETTY_FUNCTION__)) | ||||||
10667 | })) &&(((Previous.empty() || llvm::any_of(Previous, [](const NamedDecl *ND) { return ND->hasAttr<OverloadableAttr>(); })) && "Non-redecls shouldn't happen without overloadable present") ? static_cast<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-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 10668, __PRETTY_FUNCTION__)) | ||||||
10668 | "Non-redecls shouldn't happen without overloadable present")(((Previous.empty() || llvm::any_of(Previous, [](const NamedDecl *ND) { return ND->hasAttr<OverloadableAttr>(); })) && "Non-redecls shouldn't happen without overloadable present") ? static_cast<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-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 10668, __PRETTY_FUNCTION__)); | ||||||
10669 | |||||||
10670 | auto OtherUnmarkedIter = llvm::find_if(Previous, [](const NamedDecl *ND) { | ||||||
10671 | const auto *FD = dyn_cast<FunctionDecl>(ND); | ||||||
10672 | return FD && !FD->hasAttr<OverloadableAttr>(); | ||||||
10673 | }); | ||||||
10674 | |||||||
10675 | if (OtherUnmarkedIter != Previous.end()) { | ||||||
10676 | Diag(NewFD->getLocation(), | ||||||
10677 | diag::err_attribute_overloadable_multiple_unmarked_overloads); | ||||||
10678 | Diag((*OtherUnmarkedIter)->getLocation(), | ||||||
10679 | diag::note_attribute_overloadable_prev_overload) | ||||||
10680 | << false; | ||||||
10681 | |||||||
10682 | NewFD->addAttr(OverloadableAttr::CreateImplicit(Context)); | ||||||
10683 | } | ||||||
10684 | } | ||||||
10685 | |||||||
10686 | // Semantic checking for this function declaration (in isolation). | ||||||
10687 | |||||||
10688 | if (getLangOpts().CPlusPlus) { | ||||||
10689 | // C++-specific checks. | ||||||
10690 | if (CXXConstructorDecl *Constructor = dyn_cast<CXXConstructorDecl>(NewFD)) { | ||||||
10691 | CheckConstructor(Constructor); | ||||||
10692 | } else if (CXXDestructorDecl *Destructor = | ||||||
10693 | dyn_cast<CXXDestructorDecl>(NewFD)) { | ||||||
10694 | CXXRecordDecl *Record = Destructor->getParent(); | ||||||
10695 | QualType ClassType = Context.getTypeDeclType(Record); | ||||||
10696 | |||||||
10697 | // FIXME: Shouldn't we be able to perform this check even when the class | ||||||
10698 | // type is dependent? Both gcc and edg can handle that. | ||||||
10699 | if (!ClassType->isDependentType()) { | ||||||
10700 | DeclarationName Name | ||||||
10701 | = Context.DeclarationNames.getCXXDestructorName( | ||||||
10702 | Context.getCanonicalType(ClassType)); | ||||||
10703 | if (NewFD->getDeclName() != Name) { | ||||||
10704 | Diag(NewFD->getLocation(), diag::err_destructor_name); | ||||||
10705 | NewFD->setInvalidDecl(); | ||||||
10706 | return Redeclaration; | ||||||
10707 | } | ||||||
10708 | } | ||||||
10709 | } else if (CXXConversionDecl *Conversion | ||||||
10710 | = dyn_cast<CXXConversionDecl>(NewFD)) { | ||||||
10711 | ActOnConversionDeclarator(Conversion); | ||||||
10712 | } else if (auto *Guide = dyn_cast<CXXDeductionGuideDecl>(NewFD)) { | ||||||
10713 | if (auto *TD = Guide->getDescribedFunctionTemplate()) | ||||||
10714 | CheckDeductionGuideTemplate(TD); | ||||||
10715 | |||||||
10716 | // A deduction guide is not on the list of entities that can be | ||||||
10717 | // explicitly specialized. | ||||||
10718 | if (Guide->getTemplateSpecializationKind() == TSK_ExplicitSpecialization) | ||||||
10719 | Diag(Guide->getBeginLoc(), diag::err_deduction_guide_specialized) | ||||||
10720 | << /*explicit specialization*/ 1; | ||||||
10721 | } | ||||||
10722 | |||||||
10723 | // Find any virtual functions that this function overrides. | ||||||
10724 | if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(NewFD)) { | ||||||
10725 | if (!Method->isFunctionTemplateSpecialization() && | ||||||
10726 | !Method->getDescribedFunctionTemplate() && | ||||||
10727 | Method->isCanonicalDecl()) { | ||||||
10728 | if (AddOverriddenMethods(Method->getParent(), Method)) { | ||||||
10729 | // If the function was marked as "static", we have a problem. | ||||||
10730 | if (NewFD->getStorageClass() == SC_Static) { | ||||||
10731 | ReportOverrides(*this, diag::err_static_overrides_virtual, Method); | ||||||
10732 | } | ||||||
10733 | } | ||||||
10734 | } | ||||||
10735 | if (Method->isVirtual() && NewFD->getTrailingRequiresClause()) | ||||||
10736 | // C++2a [class.virtual]p6 | ||||||
10737 | // A virtual method shall not have a requires-clause. | ||||||
10738 | Diag(NewFD->getTrailingRequiresClause()->getBeginLoc(), | ||||||
10739 | diag::err_constrained_virtual_method); | ||||||
10740 | |||||||
10741 | if (Method->isStatic()) | ||||||
10742 | checkThisInStaticMemberFunctionType(Method); | ||||||
10743 | } | ||||||
10744 | |||||||
10745 | // Extra checking for C++ overloaded operators (C++ [over.oper]). | ||||||
10746 | if (NewFD->isOverloadedOperator() && | ||||||
10747 | CheckOverloadedOperatorDeclaration(NewFD)) { | ||||||
10748 | NewFD->setInvalidDecl(); | ||||||
10749 | return Redeclaration; | ||||||
10750 | } | ||||||
10751 | |||||||
10752 | // Extra checking for C++0x literal operators (C++0x [over.literal]). | ||||||
10753 | if (NewFD->getLiteralIdentifier() && | ||||||
10754 | CheckLiteralOperatorDeclaration(NewFD)) { | ||||||
10755 | NewFD->setInvalidDecl(); | ||||||
10756 | return Redeclaration; | ||||||
10757 | } | ||||||
10758 | |||||||
10759 | // In C++, check default arguments now that we have merged decls. Unless | ||||||
10760 | // the lexical context is the class, because in this case this is done | ||||||
10761 | // during delayed parsing anyway. | ||||||
10762 | if (!CurContext->isRecord()) | ||||||
10763 | CheckCXXDefaultArguments(NewFD); | ||||||
10764 | |||||||
10765 | // If this function declares a builtin function, check the type of this | ||||||
10766 | // declaration against the expected type for the builtin. | ||||||
10767 | if (unsigned BuiltinID = NewFD->getBuiltinID()) { | ||||||
10768 | ASTContext::GetBuiltinTypeError Error; | ||||||
10769 | LookupPredefedObjCSuperType(*this, S, NewFD->getIdentifier()); | ||||||
10770 | QualType T = Context.GetBuiltinType(BuiltinID, Error); | ||||||
10771 | // If the type of the builtin differs only in its exception | ||||||
10772 | // specification, that's OK. | ||||||
10773 | // FIXME: If the types do differ in this way, it would be better to | ||||||
10774 | // retain the 'noexcept' form of the type. | ||||||
10775 | if (!T.isNull() && | ||||||
10776 | !Context.hasSameFunctionTypeIgnoringExceptionSpec(T, | ||||||
10777 | NewFD->getType())) | ||||||
10778 | // The type of this function differs from the type of the builtin, | ||||||
10779 | // so forget about the builtin entirely. | ||||||
10780 | Context.BuiltinInfo.forgetBuiltin(BuiltinID, Context.Idents); | ||||||
10781 | } | ||||||
10782 | |||||||
10783 | // If this function is declared as being extern "C", then check to see if | ||||||
10784 | // the function returns a UDT (class, struct, or union type) that is not C | ||||||
10785 | // compatible, and if it does, warn the user. | ||||||
10786 | // But, issue any diagnostic on the first declaration only. | ||||||
10787 | if (Previous.empty() && NewFD->isExternC()) { | ||||||
10788 | QualType R = NewFD->getReturnType(); | ||||||
10789 | if (R->isIncompleteType() && !R->isVoidType()) | ||||||
10790 | Diag(NewFD->getLocation(), diag::warn_return_value_udt_incomplete) | ||||||
10791 | << NewFD << R; | ||||||
10792 | else if (!R.isPODType(Context) && !R->isVoidType() && | ||||||
10793 | !R->isObjCObjectPointerType()) | ||||||
10794 | Diag(NewFD->getLocation(), diag::warn_return_value_udt) << NewFD << R; | ||||||
10795 | } | ||||||
10796 | |||||||
10797 | // C++1z [dcl.fct]p6: | ||||||
10798 | // [...] whether the function has a non-throwing exception-specification | ||||||
10799 | // [is] part of the function type | ||||||
10800 | // | ||||||
10801 | // This results in an ABI break between C++14 and C++17 for functions whose | ||||||
10802 | // declared type includes an exception-specification in a parameter or | ||||||
10803 | // return type. (Exception specifications on the function itself are OK in | ||||||
10804 | // most cases, and exception specifications are not permitted in most other | ||||||
10805 | // contexts where they could make it into a mangling.) | ||||||
10806 | if (!getLangOpts().CPlusPlus17 && !NewFD->getPrimaryTemplate()) { | ||||||
10807 | auto HasNoexcept = [&](QualType T) -> bool { | ||||||
10808 | // Strip off declarator chunks that could be between us and a function | ||||||
10809 | // type. We don't need to look far, exception specifications are very | ||||||
10810 | // restricted prior to C++17. | ||||||
10811 | if (auto *RT = T->getAs<ReferenceType>()) | ||||||
10812 | T = RT->getPointeeType(); | ||||||
10813 | else if (T->isAnyPointerType()) | ||||||
10814 | T = T->getPointeeType(); | ||||||
10815 | else if (auto *MPT = T->getAs<MemberPointerType>()) | ||||||
10816 | T = MPT->getPointeeType(); | ||||||
10817 | if (auto *FPT = T->getAs<FunctionProtoType>()) | ||||||
10818 | if (FPT->isNothrow()) | ||||||
10819 | return true; | ||||||
10820 | return false; | ||||||
10821 | }; | ||||||
10822 | |||||||
10823 | auto *FPT = NewFD->getType()->castAs<FunctionProtoType>(); | ||||||
10824 | bool AnyNoexcept = HasNoexcept(FPT->getReturnType()); | ||||||
10825 | for (QualType T : FPT->param_types()) | ||||||
10826 | AnyNoexcept |= HasNoexcept(T); | ||||||
10827 | if (AnyNoexcept) | ||||||
10828 | Diag(NewFD->getLocation(), | ||||||
10829 | diag::warn_cxx17_compat_exception_spec_in_signature) | ||||||
10830 | << NewFD; | ||||||
10831 | } | ||||||
10832 | |||||||
10833 | if (!Redeclaration && LangOpts.CUDA) | ||||||
10834 | checkCUDATargetOverload(NewFD, Previous); | ||||||
10835 | } | ||||||
10836 | return Redeclaration; | ||||||
10837 | } | ||||||
10838 | |||||||
10839 | void Sema::CheckMain(FunctionDecl* FD, const DeclSpec& DS) { | ||||||
10840 | // C++11 [basic.start.main]p3: | ||||||
10841 | // A program that [...] declares main to be inline, static or | ||||||
10842 | // constexpr is ill-formed. | ||||||
10843 | // C11 6.7.4p4: In a hosted environment, no function specifier(s) shall | ||||||
10844 | // appear in a declaration of main. | ||||||
10845 | // static main is not an error under C99, but we should warn about it. | ||||||
10846 | // We accept _Noreturn main as an extension. | ||||||
10847 | if (FD->getStorageClass() == SC_Static) | ||||||
10848 | Diag(DS.getStorageClassSpecLoc(), getLangOpts().CPlusPlus | ||||||
10849 | ? diag::err_static_main : diag::warn_static_main) | ||||||
10850 | << FixItHint::CreateRemoval(DS.getStorageClassSpecLoc()); | ||||||
10851 | if (FD->isInlineSpecified()) | ||||||
10852 | Diag(DS.getInlineSpecLoc(), diag::err_inline_main) | ||||||
10853 | << FixItHint::CreateRemoval(DS.getInlineSpecLoc()); | ||||||
10854 | if (DS.isNoreturnSpecified()) { | ||||||
10855 | SourceLocation NoreturnLoc = DS.getNoreturnSpecLoc(); | ||||||
10856 | SourceRange NoreturnRange(NoreturnLoc, getLocForEndOfToken(NoreturnLoc)); | ||||||
10857 | Diag(NoreturnLoc, diag::ext_noreturn_main); | ||||||
10858 | Diag(NoreturnLoc, diag::note_main_remove_noreturn) | ||||||
10859 | << FixItHint::CreateRemoval(NoreturnRange); | ||||||
10860 | } | ||||||
10861 | if (FD->isConstexpr()) { | ||||||
10862 | Diag(DS.getConstexprSpecLoc(), diag::err_constexpr_main) | ||||||
10863 | << FD->isConsteval() | ||||||
10864 | << FixItHint::CreateRemoval(DS.getConstexprSpecLoc()); | ||||||
10865 | FD->setConstexprKind(CSK_unspecified); | ||||||
10866 | } | ||||||
10867 | |||||||
10868 | if (getLangOpts().OpenCL) { | ||||||
10869 | Diag(FD->getLocation(), diag::err_opencl_no_main) | ||||||
10870 | << FD->hasAttr<OpenCLKernelAttr>(); | ||||||
10871 | FD->setInvalidDecl(); | ||||||
10872 | return; | ||||||
10873 | } | ||||||
10874 | |||||||
10875 | QualType T = FD->getType(); | ||||||
10876 | assert(T->isFunctionType() && "function decl is not of function type")((T->isFunctionType() && "function decl is not of function type" ) ? static_cast<void> (0) : __assert_fail ("T->isFunctionType() && \"function decl is not of function type\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 10876, __PRETTY_FUNCTION__)); | ||||||
10877 | const FunctionType* FT = T->castAs<FunctionType>(); | ||||||
10878 | |||||||
10879 | // Set default calling convention for main() | ||||||
10880 | if (FT->getCallConv() != CC_C) { | ||||||
10881 | FT = Context.adjustFunctionType(FT, FT->getExtInfo().withCallingConv(CC_C)); | ||||||
10882 | FD->setType(QualType(FT, 0)); | ||||||
10883 | T = Context.getCanonicalType(FD->getType()); | ||||||
10884 | } | ||||||
10885 | |||||||
10886 | if (getLangOpts().GNUMode && !getLangOpts().CPlusPlus) { | ||||||
10887 | // In C with GNU extensions we allow main() to have non-integer return | ||||||
10888 | // type, but we should warn about the extension, and we disable the | ||||||
10889 | // implicit-return-zero rule. | ||||||
10890 | |||||||
10891 | // GCC in C mode accepts qualified 'int'. | ||||||
10892 | if (Context.hasSameUnqualifiedType(FT->getReturnType(), Context.IntTy)) | ||||||
10893 | FD->setHasImplicitReturnZero(true); | ||||||
10894 | else { | ||||||
10895 | Diag(FD->getTypeSpecStartLoc(), diag::ext_main_returns_nonint); | ||||||
10896 | SourceRange RTRange = FD->getReturnTypeSourceRange(); | ||||||
10897 | if (RTRange.isValid()) | ||||||
10898 | Diag(RTRange.getBegin(), diag::note_main_change_return_type) | ||||||
10899 | << FixItHint::CreateReplacement(RTRange, "int"); | ||||||
10900 | } | ||||||
10901 | } else { | ||||||
10902 | // In C and C++, main magically returns 0 if you fall off the end; | ||||||
10903 | // set the flag which tells us that. | ||||||
10904 | // This is C++ [basic.start.main]p5 and C99 5.1.2.2.3. | ||||||
10905 | |||||||
10906 | // All the standards say that main() should return 'int'. | ||||||
10907 | if (Context.hasSameType(FT->getReturnType(), Context.IntTy)) | ||||||
10908 | FD->setHasImplicitReturnZero(true); | ||||||
10909 | else { | ||||||
10910 | // Otherwise, this is just a flat-out error. | ||||||
10911 | SourceRange RTRange = FD->getReturnTypeSourceRange(); | ||||||
10912 | Diag(FD->getTypeSpecStartLoc(), diag::err_main_returns_nonint) | ||||||
10913 | << (RTRange.isValid() ? FixItHint::CreateReplacement(RTRange, "int") | ||||||
10914 | : FixItHint()); | ||||||
10915 | FD->setInvalidDecl(true); | ||||||
10916 | } | ||||||
10917 | } | ||||||
10918 | |||||||
10919 | // Treat protoless main() as nullary. | ||||||
10920 | if (isa<FunctionNoProtoType>(FT)) return; | ||||||
10921 | |||||||
10922 | const FunctionProtoType* FTP = cast<const FunctionProtoType>(FT); | ||||||
10923 | unsigned nparams = FTP->getNumParams(); | ||||||
10924 | assert(FD->getNumParams() == nparams)((FD->getNumParams() == nparams) ? static_cast<void> (0) : __assert_fail ("FD->getNumParams() == nparams", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 10924, __PRETTY_FUNCTION__)); | ||||||
10925 | |||||||
10926 | bool HasExtraParameters = (nparams > 3); | ||||||
10927 | |||||||
10928 | if (FTP->isVariadic()) { | ||||||
10929 | Diag(FD->getLocation(), diag::ext_variadic_main); | ||||||
10930 | // FIXME: if we had information about the location of the ellipsis, we | ||||||
10931 | // could add a FixIt hint to remove it as a parameter. | ||||||
10932 | } | ||||||
10933 | |||||||
10934 | // Darwin passes an undocumented fourth argument of type char**. If | ||||||
10935 | // other platforms start sprouting these, the logic below will start | ||||||
10936 | // getting shifty. | ||||||
10937 | if (nparams == 4 && Context.getTargetInfo().getTriple().isOSDarwin()) | ||||||
10938 | HasExtraParameters = false; | ||||||
10939 | |||||||
10940 | if (HasExtraParameters) { | ||||||
10941 | Diag(FD->getLocation(), diag::err_main_surplus_args) << nparams; | ||||||
10942 | FD->setInvalidDecl(true); | ||||||
10943 | nparams = 3; | ||||||
10944 | } | ||||||
10945 | |||||||
10946 | // FIXME: a lot of the following diagnostics would be improved | ||||||
10947 | // if we had some location information about types. | ||||||
10948 | |||||||
10949 | QualType CharPP = | ||||||
10950 | Context.getPointerType(Context.getPointerType(Context.CharTy)); | ||||||
10951 | QualType Expected[] = { Context.IntTy, CharPP, CharPP, CharPP }; | ||||||
10952 | |||||||
10953 | for (unsigned i = 0; i < nparams; ++i) { | ||||||
10954 | QualType AT = FTP->getParamType(i); | ||||||
10955 | |||||||
10956 | bool mismatch = true; | ||||||
10957 | |||||||
10958 | if (Context.hasSameUnqualifiedType(AT, Expected[i])) | ||||||
10959 | mismatch = false; | ||||||
10960 | else if (Expected[i] == CharPP) { | ||||||
10961 | // As an extension, the following forms are okay: | ||||||
10962 | // char const ** | ||||||
10963 | // char const * const * | ||||||
10964 | // char * const * | ||||||
10965 | |||||||
10966 | QualifierCollector qs; | ||||||
10967 | const PointerType* PT; | ||||||
10968 | if ((PT = qs.strip(AT)->getAs<PointerType>()) && | ||||||
10969 | (PT = qs.strip(PT->getPointeeType())->getAs<PointerType>()) && | ||||||
10970 | Context.hasSameType(QualType(qs.strip(PT->getPointeeType()), 0), | ||||||
10971 | Context.CharTy)) { | ||||||
10972 | qs.removeConst(); | ||||||
10973 | mismatch = !qs.empty(); | ||||||
10974 | } | ||||||
10975 | } | ||||||
10976 | |||||||
10977 | if (mismatch) { | ||||||
10978 | Diag(FD->getLocation(), diag::err_main_arg_wrong) << i << Expected[i]; | ||||||
10979 | // TODO: suggest replacing given type with expected type | ||||||
10980 | FD->setInvalidDecl(true); | ||||||
10981 | } | ||||||
10982 | } | ||||||
10983 | |||||||
10984 | if (nparams == 1 && !FD->isInvalidDecl()) { | ||||||
10985 | Diag(FD->getLocation(), diag::warn_main_one_arg); | ||||||
10986 | } | ||||||
10987 | |||||||
10988 | if (!FD->isInvalidDecl() && FD->getDescribedFunctionTemplate()) { | ||||||
10989 | Diag(FD->getLocation(), diag::err_mainlike_template_decl) << FD; | ||||||
10990 | FD->setInvalidDecl(); | ||||||
10991 | } | ||||||
10992 | } | ||||||
10993 | |||||||
10994 | void Sema::CheckMSVCRTEntryPoint(FunctionDecl *FD) { | ||||||
10995 | QualType T = FD->getType(); | ||||||
10996 | assert(T->isFunctionType() && "function decl is not of function type")((T->isFunctionType() && "function decl is not of function type" ) ? static_cast<void> (0) : __assert_fail ("T->isFunctionType() && \"function decl is not of function type\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 10996, __PRETTY_FUNCTION__)); | ||||||
10997 | const FunctionType *FT = T->castAs<FunctionType>(); | ||||||
10998 | |||||||
10999 | // Set an implicit return of 'zero' if the function can return some integral, | ||||||
11000 | // enumeration, pointer or nullptr type. | ||||||
11001 | if (FT->getReturnType()->isIntegralOrEnumerationType() || | ||||||
11002 | FT->getReturnType()->isAnyPointerType() || | ||||||
11003 | FT->getReturnType()->isNullPtrType()) | ||||||
11004 | // DllMain is exempt because a return value of zero means it failed. | ||||||
11005 | if (FD->getName() != "DllMain") | ||||||
11006 | FD->setHasImplicitReturnZero(true); | ||||||
11007 | |||||||
11008 | if (!FD->isInvalidDecl() && FD->getDescribedFunctionTemplate()) { | ||||||
11009 | Diag(FD->getLocation(), diag::err_mainlike_template_decl) << FD; | ||||||
11010 | FD->setInvalidDecl(); | ||||||
11011 | } | ||||||
11012 | } | ||||||
11013 | |||||||
11014 | bool Sema::CheckForConstantInitializer(Expr *Init, QualType DclT) { | ||||||
11015 | // FIXME: Need strict checking. In C89, we need to check for | ||||||
11016 | // any assignment, increment, decrement, function-calls, or | ||||||
11017 | // commas outside of a sizeof. In C99, it's the same list, | ||||||
11018 | // except that the aforementioned are allowed in unevaluated | ||||||
11019 | // expressions. Everything else falls under the | ||||||
11020 | // "may accept other forms of constant expressions" exception. | ||||||
11021 | // (We never end up here for C++, so the constant expression | ||||||
11022 | // rules there don't matter.) | ||||||
11023 | const Expr *Culprit; | ||||||
11024 | if (Init->isConstantInitializer(Context, false, &Culprit)) | ||||||
11025 | return false; | ||||||
11026 | Diag(Culprit->getExprLoc(), diag::err_init_element_not_constant) | ||||||
11027 | << Culprit->getSourceRange(); | ||||||
11028 | return true; | ||||||
11029 | } | ||||||
11030 | |||||||
11031 | namespace { | ||||||
11032 | // Visits an initialization expression to see if OrigDecl is evaluated in | ||||||
11033 | // its own initialization and throws a warning if it does. | ||||||
11034 | class SelfReferenceChecker | ||||||
11035 | : public EvaluatedExprVisitor<SelfReferenceChecker> { | ||||||
11036 | Sema &S; | ||||||
11037 | Decl *OrigDecl; | ||||||
11038 | bool isRecordType; | ||||||
11039 | bool isPODType; | ||||||
11040 | bool isReferenceType; | ||||||
11041 | |||||||
11042 | bool isInitList; | ||||||
11043 | llvm::SmallVector<unsigned, 4> InitFieldIndex; | ||||||
11044 | |||||||
11045 | public: | ||||||
11046 | typedef EvaluatedExprVisitor<SelfReferenceChecker> Inherited; | ||||||
11047 | |||||||
11048 | SelfReferenceChecker(Sema &S, Decl *OrigDecl) : Inherited(S.Context), | ||||||
11049 | S(S), OrigDecl(OrigDecl) { | ||||||
11050 | isPODType = false; | ||||||
11051 | isRecordType = false; | ||||||
11052 | isReferenceType = false; | ||||||
11053 | isInitList = false; | ||||||
11054 | if (ValueDecl *VD = dyn_cast<ValueDecl>(OrigDecl)) { | ||||||
11055 | isPODType = VD->getType().isPODType(S.Context); | ||||||
11056 | isRecordType = VD->getType()->isRecordType(); | ||||||
11057 | isReferenceType = VD->getType()->isReferenceType(); | ||||||
11058 | } | ||||||
11059 | } | ||||||
11060 | |||||||
11061 | // For most expressions, just call the visitor. For initializer lists, | ||||||
11062 | // track the index of the field being initialized since fields are | ||||||
11063 | // initialized in order allowing use of previously initialized fields. | ||||||
11064 | void CheckExpr(Expr *E) { | ||||||
11065 | InitListExpr *InitList = dyn_cast<InitListExpr>(E); | ||||||
11066 | if (!InitList) { | ||||||
11067 | Visit(E); | ||||||
11068 | return; | ||||||
11069 | } | ||||||
11070 | |||||||
11071 | // Track and increment the index here. | ||||||
11072 | isInitList = true; | ||||||
11073 | InitFieldIndex.push_back(0); | ||||||
11074 | for (auto Child : InitList->children()) { | ||||||
11075 | CheckExpr(cast<Expr>(Child)); | ||||||
11076 | ++InitFieldIndex.back(); | ||||||
11077 | } | ||||||
11078 | InitFieldIndex.pop_back(); | ||||||
11079 | } | ||||||
11080 | |||||||
11081 | // Returns true if MemberExpr is checked and no further checking is needed. | ||||||
11082 | // Returns false if additional checking is required. | ||||||
11083 | bool CheckInitListMemberExpr(MemberExpr *E, bool CheckReference) { | ||||||
11084 | llvm::SmallVector<FieldDecl*, 4> Fields; | ||||||
11085 | Expr *Base = E; | ||||||
11086 | bool ReferenceField = false; | ||||||
11087 | |||||||
11088 | // Get the field members used. | ||||||
11089 | while (MemberExpr *ME = dyn_cast<MemberExpr>(Base)) { | ||||||
11090 | FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl()); | ||||||
11091 | if (!FD) | ||||||
11092 | return false; | ||||||
11093 | Fields.push_back(FD); | ||||||
11094 | if (FD->getType()->isReferenceType()) | ||||||
11095 | ReferenceField = true; | ||||||
11096 | Base = ME->getBase()->IgnoreParenImpCasts(); | ||||||
11097 | } | ||||||
11098 | |||||||
11099 | // Keep checking only if the base Decl is the same. | ||||||
11100 | DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(Base); | ||||||
11101 | if (!DRE || DRE->getDecl() != OrigDecl) | ||||||
11102 | return false; | ||||||
11103 | |||||||
11104 | // A reference field can be bound to an unininitialized field. | ||||||
11105 | if (CheckReference && !ReferenceField) | ||||||
11106 | return true; | ||||||
11107 | |||||||
11108 | // Convert FieldDecls to their index number. | ||||||
11109 | llvm::SmallVector<unsigned, 4> UsedFieldIndex; | ||||||
11110 | for (const FieldDecl *I : llvm::reverse(Fields)) | ||||||
11111 | UsedFieldIndex.push_back(I->getFieldIndex()); | ||||||
11112 | |||||||
11113 | // See if a warning is needed by checking the first difference in index | ||||||
11114 | // numbers. If field being used has index less than the field being | ||||||
11115 | // initialized, then the use is safe. | ||||||
11116 | for (auto UsedIter = UsedFieldIndex.begin(), | ||||||
11117 | UsedEnd = UsedFieldIndex.end(), | ||||||
11118 | OrigIter = InitFieldIndex.begin(), | ||||||
11119 | OrigEnd = InitFieldIndex.end(); | ||||||
11120 | UsedIter != UsedEnd && OrigIter != OrigEnd; ++UsedIter, ++OrigIter) { | ||||||
11121 | if (*UsedIter < *OrigIter) | ||||||
11122 | return true; | ||||||
11123 | if (*UsedIter > *OrigIter) | ||||||
11124 | break; | ||||||
11125 | } | ||||||
11126 | |||||||
11127 | // TODO: Add a different warning which will print the field names. | ||||||
11128 | HandleDeclRefExpr(DRE); | ||||||
11129 | return true; | ||||||
11130 | } | ||||||
11131 | |||||||
11132 | // For most expressions, the cast is directly above the DeclRefExpr. | ||||||
11133 | // For conditional operators, the cast can be outside the conditional | ||||||
11134 | // operator if both expressions are DeclRefExpr's. | ||||||
11135 | void HandleValue(Expr *E) { | ||||||
11136 | E = E->IgnoreParens(); | ||||||
11137 | if (DeclRefExpr* DRE = dyn_cast<DeclRefExpr>(E)) { | ||||||
11138 | HandleDeclRefExpr(DRE); | ||||||
11139 | return; | ||||||
11140 | } | ||||||
11141 | |||||||
11142 | if (ConditionalOperator *CO = dyn_cast<ConditionalOperator>(E)) { | ||||||
11143 | Visit(CO->getCond()); | ||||||
11144 | HandleValue(CO->getTrueExpr()); | ||||||
11145 | HandleValue(CO->getFalseExpr()); | ||||||
11146 | return; | ||||||
11147 | } | ||||||
11148 | |||||||
11149 | if (BinaryConditionalOperator *BCO = | ||||||
11150 | dyn_cast<BinaryConditionalOperator>(E)) { | ||||||
11151 | Visit(BCO->getCond()); | ||||||
11152 | HandleValue(BCO->getFalseExpr()); | ||||||
11153 | return; | ||||||
11154 | } | ||||||
11155 | |||||||
11156 | if (OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(E)) { | ||||||
11157 | HandleValue(OVE->getSourceExpr()); | ||||||
11158 | return; | ||||||
11159 | } | ||||||
11160 | |||||||
11161 | if (BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) { | ||||||
11162 | if (BO->getOpcode() == BO_Comma) { | ||||||
11163 | Visit(BO->getLHS()); | ||||||
11164 | HandleValue(BO->getRHS()); | ||||||
11165 | return; | ||||||
11166 | } | ||||||
11167 | } | ||||||
11168 | |||||||
11169 | if (isa<MemberExpr>(E)) { | ||||||
11170 | if (isInitList) { | ||||||
11171 | if (CheckInitListMemberExpr(cast<MemberExpr>(E), | ||||||
11172 | false /*CheckReference*/)) | ||||||
11173 | return; | ||||||
11174 | } | ||||||
11175 | |||||||
11176 | Expr *Base = E->IgnoreParenImpCasts(); | ||||||
11177 | while (MemberExpr *ME = dyn_cast<MemberExpr>(Base)) { | ||||||
11178 | // Check for static member variables and don't warn on them. | ||||||
11179 | if (!isa<FieldDecl>(ME->getMemberDecl())) | ||||||
11180 | return; | ||||||
11181 | Base = ME->getBase()->IgnoreParenImpCasts(); | ||||||
11182 | } | ||||||
11183 | if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(Base)) | ||||||
11184 | HandleDeclRefExpr(DRE); | ||||||
11185 | return; | ||||||
11186 | } | ||||||
11187 | |||||||
11188 | Visit(E); | ||||||
11189 | } | ||||||
11190 | |||||||
11191 | // Reference types not handled in HandleValue are handled here since all | ||||||
11192 | // uses of references are bad, not just r-value uses. | ||||||
11193 | void VisitDeclRefExpr(DeclRefExpr *E) { | ||||||
11194 | if (isReferenceType) | ||||||
11195 | HandleDeclRefExpr(E); | ||||||
11196 | } | ||||||
11197 | |||||||
11198 | void VisitImplicitCastExpr(ImplicitCastExpr *E) { | ||||||
11199 | if (E->getCastKind() == CK_LValueToRValue) { | ||||||
11200 | HandleValue(E->getSubExpr()); | ||||||
11201 | return; | ||||||
11202 | } | ||||||
11203 | |||||||
11204 | Inherited::VisitImplicitCastExpr(E); | ||||||
11205 | } | ||||||
11206 | |||||||
11207 | void VisitMemberExpr(MemberExpr *E) { | ||||||
11208 | if (isInitList) { | ||||||
11209 | if (CheckInitListMemberExpr(E, true /*CheckReference*/)) | ||||||
11210 | return; | ||||||
11211 | } | ||||||
11212 | |||||||
11213 | // Don't warn on arrays since they can be treated as pointers. | ||||||
11214 | if (E->getType()->canDecayToPointerType()) return; | ||||||
11215 | |||||||
11216 | // Warn when a non-static method call is followed by non-static member | ||||||
11217 | // field accesses, which is followed by a DeclRefExpr. | ||||||
11218 | CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(E->getMemberDecl()); | ||||||
11219 | bool Warn = (MD && !MD->isStatic()); | ||||||
11220 | Expr *Base = E->getBase()->IgnoreParenImpCasts(); | ||||||
11221 | while (MemberExpr *ME = dyn_cast<MemberExpr>(Base)) { | ||||||
11222 | if (!isa<FieldDecl>(ME->getMemberDecl())) | ||||||
11223 | Warn = false; | ||||||
11224 | Base = ME->getBase()->IgnoreParenImpCasts(); | ||||||
11225 | } | ||||||
11226 | |||||||
11227 | if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(Base)) { | ||||||
11228 | if (Warn) | ||||||
11229 | HandleDeclRefExpr(DRE); | ||||||
11230 | return; | ||||||
11231 | } | ||||||
11232 | |||||||
11233 | // The base of a MemberExpr is not a MemberExpr or a DeclRefExpr. | ||||||
11234 | // Visit that expression. | ||||||
11235 | Visit(Base); | ||||||
11236 | } | ||||||
11237 | |||||||
11238 | void VisitCXXOperatorCallExpr(CXXOperatorCallExpr *E) { | ||||||
11239 | Expr *Callee = E->getCallee(); | ||||||
11240 | |||||||
11241 | if (isa<UnresolvedLookupExpr>(Callee)) | ||||||
11242 | return Inherited::VisitCXXOperatorCallExpr(E); | ||||||
11243 | |||||||
11244 | Visit(Callee); | ||||||
11245 | for (auto Arg: E->arguments()) | ||||||
11246 | HandleValue(Arg->IgnoreParenImpCasts()); | ||||||
11247 | } | ||||||
11248 | |||||||
11249 | void VisitUnaryOperator(UnaryOperator *E) { | ||||||
11250 | // For POD record types, addresses of its own members are well-defined. | ||||||
11251 | if (E->getOpcode() == UO_AddrOf && isRecordType && | ||||||
11252 | isa<MemberExpr>(E->getSubExpr()->IgnoreParens())) { | ||||||
11253 | if (!isPODType) | ||||||
11254 | HandleValue(E->getSubExpr()); | ||||||
11255 | return; | ||||||
11256 | } | ||||||
11257 | |||||||
11258 | if (E->isIncrementDecrementOp()) { | ||||||
11259 | HandleValue(E->getSubExpr()); | ||||||
11260 | return; | ||||||
11261 | } | ||||||
11262 | |||||||
11263 | Inherited::VisitUnaryOperator(E); | ||||||
11264 | } | ||||||
11265 | |||||||
11266 | void VisitObjCMessageExpr(ObjCMessageExpr *E) {} | ||||||
11267 | |||||||
11268 | void VisitCXXConstructExpr(CXXConstructExpr *E) { | ||||||
11269 | if (E->getConstructor()->isCopyConstructor()) { | ||||||
11270 | Expr *ArgExpr = E->getArg(0); | ||||||
11271 | if (InitListExpr *ILE = dyn_cast<InitListExpr>(ArgExpr)) | ||||||
11272 | if (ILE->getNumInits() == 1) | ||||||
11273 | ArgExpr = ILE->getInit(0); | ||||||
11274 | if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(ArgExpr)) | ||||||
11275 | if (ICE->getCastKind() == CK_NoOp) | ||||||
11276 | ArgExpr = ICE->getSubExpr(); | ||||||
11277 | HandleValue(ArgExpr); | ||||||
11278 | return; | ||||||
11279 | } | ||||||
11280 | Inherited::VisitCXXConstructExpr(E); | ||||||
11281 | } | ||||||
11282 | |||||||
11283 | void VisitCallExpr(CallExpr *E) { | ||||||
11284 | // Treat std::move as a use. | ||||||
11285 | if (E->isCallToStdMove()) { | ||||||
11286 | HandleValue(E->getArg(0)); | ||||||
11287 | return; | ||||||
11288 | } | ||||||
11289 | |||||||
11290 | Inherited::VisitCallExpr(E); | ||||||
11291 | } | ||||||
11292 | |||||||
11293 | void VisitBinaryOperator(BinaryOperator *E) { | ||||||
11294 | if (E->isCompoundAssignmentOp()) { | ||||||
11295 | HandleValue(E->getLHS()); | ||||||
11296 | Visit(E->getRHS()); | ||||||
11297 | return; | ||||||
11298 | } | ||||||
11299 | |||||||
11300 | Inherited::VisitBinaryOperator(E); | ||||||
11301 | } | ||||||
11302 | |||||||
11303 | // A custom visitor for BinaryConditionalOperator is needed because the | ||||||
11304 | // regular visitor would check the condition and true expression separately | ||||||
11305 | // but both point to the same place giving duplicate diagnostics. | ||||||
11306 | void VisitBinaryConditionalOperator(BinaryConditionalOperator *E) { | ||||||
11307 | Visit(E->getCond()); | ||||||
11308 | Visit(E->getFalseExpr()); | ||||||
11309 | } | ||||||
11310 | |||||||
11311 | void HandleDeclRefExpr(DeclRefExpr *DRE) { | ||||||
11312 | Decl* ReferenceDecl = DRE->getDecl(); | ||||||
11313 | if (OrigDecl != ReferenceDecl) return; | ||||||
11314 | unsigned diag; | ||||||
11315 | if (isReferenceType) { | ||||||
11316 | diag = diag::warn_uninit_self_reference_in_reference_init; | ||||||
11317 | } else if (cast<VarDecl>(OrigDecl)->isStaticLocal()) { | ||||||
11318 | diag = diag::warn_static_self_reference_in_init; | ||||||
11319 | } else if (isa<TranslationUnitDecl>(OrigDecl->getDeclContext()) || | ||||||
11320 | isa<NamespaceDecl>(OrigDecl->getDeclContext()) || | ||||||
11321 | DRE->getDecl()->getType()->isRecordType()) { | ||||||
11322 | diag = diag::warn_uninit_self_reference_in_init; | ||||||
11323 | } else { | ||||||
11324 | // Local variables will be handled by the CFG analysis. | ||||||
11325 | return; | ||||||
11326 | } | ||||||
11327 | |||||||
11328 | S.DiagRuntimeBehavior(DRE->getBeginLoc(), DRE, | ||||||
11329 | S.PDiag(diag) | ||||||
11330 | << DRE->getDecl() << OrigDecl->getLocation() | ||||||
11331 | << DRE->getSourceRange()); | ||||||
11332 | } | ||||||
11333 | }; | ||||||
11334 | |||||||
11335 | /// CheckSelfReference - Warns if OrigDecl is used in expression E. | ||||||
11336 | static void CheckSelfReference(Sema &S, Decl* OrigDecl, Expr *E, | ||||||
11337 | bool DirectInit) { | ||||||
11338 | // Parameters arguments are occassionially constructed with itself, | ||||||
11339 | // for instance, in recursive functions. Skip them. | ||||||
11340 | if (isa<ParmVarDecl>(OrigDecl)) | ||||||
11341 | return; | ||||||
11342 | |||||||
11343 | E = E->IgnoreParens(); | ||||||
11344 | |||||||
11345 | // Skip checking T a = a where T is not a record or reference type. | ||||||
11346 | // Doing so is a way to silence uninitialized warnings. | ||||||
11347 | if (!DirectInit && !cast<VarDecl>(OrigDecl)->getType()->isRecordType()) | ||||||
11348 | if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) | ||||||
11349 | if (ICE->getCastKind() == CK_LValueToRValue) | ||||||
11350 | if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(ICE->getSubExpr())) | ||||||
11351 | if (DRE->getDecl() == OrigDecl) | ||||||
11352 | return; | ||||||
11353 | |||||||
11354 | SelfReferenceChecker(S, OrigDecl).CheckExpr(E); | ||||||
11355 | } | ||||||
11356 | } // end anonymous namespace | ||||||
11357 | |||||||
11358 | namespace { | ||||||
11359 | // Simple wrapper to add the name of a variable or (if no variable is | ||||||
11360 | // available) a DeclarationName into a diagnostic. | ||||||
11361 | struct VarDeclOrName { | ||||||
11362 | VarDecl *VDecl; | ||||||
11363 | DeclarationName Name; | ||||||
11364 | |||||||
11365 | friend const Sema::SemaDiagnosticBuilder & | ||||||
11366 | operator<<(const Sema::SemaDiagnosticBuilder &Diag, VarDeclOrName VN) { | ||||||
11367 | return VN.VDecl ? Diag << VN.VDecl : Diag << VN.Name; | ||||||
11368 | } | ||||||
11369 | }; | ||||||
11370 | } // end anonymous namespace | ||||||
11371 | |||||||
11372 | QualType Sema::deduceVarTypeFromInitializer(VarDecl *VDecl, | ||||||
11373 | DeclarationName Name, QualType Type, | ||||||
11374 | TypeSourceInfo *TSI, | ||||||
11375 | SourceRange Range, bool DirectInit, | ||||||
11376 | Expr *Init) { | ||||||
11377 | bool IsInitCapture = !VDecl; | ||||||
11378 | assert((!VDecl || !VDecl->isInitCapture()) &&(((!VDecl || !VDecl->isInitCapture()) && "init captures are expected to be deduced prior to initialization" ) ? static_cast<void> (0) : __assert_fail ("(!VDecl || !VDecl->isInitCapture()) && \"init captures are expected to be deduced prior to initialization\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 11379, __PRETTY_FUNCTION__)) | ||||||
11379 | "init captures are expected to be deduced prior to initialization")(((!VDecl || !VDecl->isInitCapture()) && "init captures are expected to be deduced prior to initialization" ) ? static_cast<void> (0) : __assert_fail ("(!VDecl || !VDecl->isInitCapture()) && \"init captures are expected to be deduced prior to initialization\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 11379, __PRETTY_FUNCTION__)); | ||||||
11380 | |||||||
11381 | VarDeclOrName VN{VDecl, Name}; | ||||||
11382 | |||||||
11383 | DeducedType *Deduced = Type->getContainedDeducedType(); | ||||||
11384 | assert(Deduced && "deduceVarTypeFromInitializer for non-deduced type")((Deduced && "deduceVarTypeFromInitializer for non-deduced type" ) ? static_cast<void> (0) : __assert_fail ("Deduced && \"deduceVarTypeFromInitializer for non-deduced type\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 11384, __PRETTY_FUNCTION__)); | ||||||
11385 | |||||||
11386 | // C++11 [dcl.spec.auto]p3 | ||||||
11387 | if (!Init) { | ||||||
11388 | assert(VDecl && "no init for init capture deduction?")((VDecl && "no init for init capture deduction?") ? static_cast <void> (0) : __assert_fail ("VDecl && \"no init for init capture deduction?\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 11388, __PRETTY_FUNCTION__)); | ||||||
11389 | |||||||
11390 | // Except for class argument deduction, and then for an initializing | ||||||
11391 | // declaration only, i.e. no static at class scope or extern. | ||||||
11392 | if (!isa<DeducedTemplateSpecializationType>(Deduced) || | ||||||
11393 | VDecl->hasExternalStorage() || | ||||||
11394 | VDecl->isStaticDataMember()) { | ||||||
11395 | Diag(VDecl->getLocation(), diag::err_auto_var_requires_init) | ||||||
11396 | << VDecl->getDeclName() << Type; | ||||||
11397 | return QualType(); | ||||||
11398 | } | ||||||
11399 | } | ||||||
11400 | |||||||
11401 | ArrayRef<Expr*> DeduceInits; | ||||||
11402 | if (Init) | ||||||
11403 | DeduceInits = Init; | ||||||
11404 | |||||||
11405 | if (DirectInit) { | ||||||
11406 | if (auto *PL = dyn_cast_or_null<ParenListExpr>(Init)) | ||||||
11407 | DeduceInits = PL->exprs(); | ||||||
11408 | } | ||||||
11409 | |||||||
11410 | if (isa<DeducedTemplateSpecializationType>(Deduced)) { | ||||||
11411 | assert(VDecl && "non-auto type for init capture deduction?")((VDecl && "non-auto type for init capture deduction?" ) ? static_cast<void> (0) : __assert_fail ("VDecl && \"non-auto type for init capture deduction?\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 11411, __PRETTY_FUNCTION__)); | ||||||
11412 | InitializedEntity Entity = InitializedEntity::InitializeVariable(VDecl); | ||||||
11413 | InitializationKind Kind = InitializationKind::CreateForInit( | ||||||
11414 | VDecl->getLocation(), DirectInit, Init); | ||||||
11415 | // FIXME: Initialization should not be taking a mutable list of inits. | ||||||
11416 | SmallVector<Expr*, 8> InitsCopy(DeduceInits.begin(), DeduceInits.end()); | ||||||
11417 | return DeduceTemplateSpecializationFromInitializer(TSI, Entity, Kind, | ||||||
11418 | InitsCopy); | ||||||
11419 | } | ||||||
11420 | |||||||
11421 | if (DirectInit) { | ||||||
11422 | if (auto *IL = dyn_cast<InitListExpr>(Init)) | ||||||
11423 | DeduceInits = IL->inits(); | ||||||
11424 | } | ||||||
11425 | |||||||
11426 | // Deduction only works if we have exactly one source expression. | ||||||
11427 | if (DeduceInits.empty()) { | ||||||
11428 | // It isn't possible to write this directly, but it is possible to | ||||||
11429 | // end up in this situation with "auto x(some_pack...);" | ||||||
11430 | Diag(Init->getBeginLoc(), IsInitCapture | ||||||
11431 | ? diag::err_init_capture_no_expression | ||||||
11432 | : diag::err_auto_var_init_no_expression) | ||||||
11433 | << VN << Type << Range; | ||||||
11434 | return QualType(); | ||||||
11435 | } | ||||||
11436 | |||||||
11437 | if (DeduceInits.size() > 1) { | ||||||
11438 | Diag(DeduceInits[1]->getBeginLoc(), | ||||||
11439 | IsInitCapture ? diag::err_init_capture_multiple_expressions | ||||||
11440 | : diag::err_auto_var_init_multiple_expressions) | ||||||
11441 | << VN << Type << Range; | ||||||
11442 | return QualType(); | ||||||
11443 | } | ||||||
11444 | |||||||
11445 | Expr *DeduceInit = DeduceInits[0]; | ||||||
11446 | if (DirectInit && isa<InitListExpr>(DeduceInit)) { | ||||||
11447 | Diag(Init->getBeginLoc(), IsInitCapture | ||||||
11448 | ? diag::err_init_capture_paren_braces | ||||||
11449 | : diag::err_auto_var_init_paren_braces) | ||||||
11450 | << isa<InitListExpr>(Init) << VN << Type << Range; | ||||||
11451 | return QualType(); | ||||||
11452 | } | ||||||
11453 | |||||||
11454 | // Expressions default to 'id' when we're in a debugger. | ||||||
11455 | bool DefaultedAnyToId = false; | ||||||
11456 | if (getLangOpts().DebuggerCastResultToId && | ||||||
11457 | Init->getType() == Context.UnknownAnyTy && !IsInitCapture) { | ||||||
11458 | ExprResult Result = forceUnknownAnyToType(Init, Context.getObjCIdType()); | ||||||
11459 | if (Result.isInvalid()) { | ||||||
11460 | return QualType(); | ||||||
11461 | } | ||||||
11462 | Init = Result.get(); | ||||||
11463 | DefaultedAnyToId = true; | ||||||
11464 | } | ||||||
11465 | |||||||
11466 | // C++ [dcl.decomp]p1: | ||||||
11467 | // If the assignment-expression [...] has array type A and no ref-qualifier | ||||||
11468 | // is present, e has type cv A | ||||||
11469 | if (VDecl && isa<DecompositionDecl>(VDecl) && | ||||||
11470 | Context.hasSameUnqualifiedType(Type, Context.getAutoDeductType()) && | ||||||
11471 | DeduceInit->getType()->isConstantArrayType()) | ||||||
11472 | return Context.getQualifiedType(DeduceInit->getType(), | ||||||
11473 | Type.getQualifiers()); | ||||||
11474 | |||||||
11475 | QualType DeducedType; | ||||||
11476 | if (DeduceAutoType(TSI, DeduceInit, DeducedType) == DAR_Failed) { | ||||||
11477 | if (!IsInitCapture) | ||||||
11478 | DiagnoseAutoDeductionFailure(VDecl, DeduceInit); | ||||||
11479 | else if (isa<InitListExpr>(Init)) | ||||||
11480 | Diag(Range.getBegin(), | ||||||
11481 | diag::err_init_capture_deduction_failure_from_init_list) | ||||||
11482 | << VN | ||||||
11483 | << (DeduceInit->getType().isNull() ? TSI->getType() | ||||||
11484 | : DeduceInit->getType()) | ||||||
11485 | << DeduceInit->getSourceRange(); | ||||||
11486 | else | ||||||
11487 | Diag(Range.getBegin(), diag::err_init_capture_deduction_failure) | ||||||
11488 | << VN << TSI->getType() | ||||||
11489 | << (DeduceInit->getType().isNull() ? TSI->getType() | ||||||
11490 | : DeduceInit->getType()) | ||||||
11491 | << DeduceInit->getSourceRange(); | ||||||
11492 | } | ||||||
11493 | |||||||
11494 | // Warn if we deduced 'id'. 'auto' usually implies type-safety, but using | ||||||
11495 | // 'id' instead of a specific object type prevents most of our usual | ||||||
11496 | // checks. | ||||||
11497 | // We only want to warn outside of template instantiations, though: | ||||||
11498 | // inside a template, the 'id' could have come from a parameter. | ||||||
11499 | if (!inTemplateInstantiation() && !DefaultedAnyToId && !IsInitCapture && | ||||||
11500 | !DeducedType.isNull() && DeducedType->isObjCIdType()) { | ||||||
11501 | SourceLocation Loc = TSI->getTypeLoc().getBeginLoc(); | ||||||
11502 | Diag(Loc, diag::warn_auto_var_is_id) << VN << Range; | ||||||
11503 | } | ||||||
11504 | |||||||
11505 | return DeducedType; | ||||||
11506 | } | ||||||
11507 | |||||||
11508 | bool Sema::DeduceVariableDeclarationType(VarDecl *VDecl, bool DirectInit, | ||||||
11509 | Expr *Init) { | ||||||
11510 | QualType DeducedType = deduceVarTypeFromInitializer( | ||||||
11511 | VDecl, VDecl->getDeclName(), VDecl->getType(), VDecl->getTypeSourceInfo(), | ||||||
11512 | VDecl->getSourceRange(), DirectInit, Init); | ||||||
11513 | if (DeducedType.isNull()) { | ||||||
11514 | VDecl->setInvalidDecl(); | ||||||
11515 | return true; | ||||||
11516 | } | ||||||
11517 | |||||||
11518 | VDecl->setType(DeducedType); | ||||||
11519 | assert(VDecl->isLinkageValid())((VDecl->isLinkageValid()) ? static_cast<void> (0) : __assert_fail ("VDecl->isLinkageValid()", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 11519, __PRETTY_FUNCTION__)); | ||||||
11520 | |||||||
11521 | // In ARC, infer lifetime. | ||||||
11522 | if (getLangOpts().ObjCAutoRefCount && inferObjCARCLifetime(VDecl)) | ||||||
11523 | VDecl->setInvalidDecl(); | ||||||
11524 | |||||||
11525 | if (getLangOpts().OpenCL) | ||||||
11526 | deduceOpenCLAddressSpace(VDecl); | ||||||
11527 | |||||||
11528 | // If this is a redeclaration, check that the type we just deduced matches | ||||||
11529 | // the previously declared type. | ||||||
11530 | if (VarDecl *Old = VDecl->getPreviousDecl()) { | ||||||
11531 | // We never need to merge the type, because we cannot form an incomplete | ||||||
11532 | // array of auto, nor deduce such a type. | ||||||
11533 | MergeVarDeclTypes(VDecl, Old, /*MergeTypeWithPrevious*/ false); | ||||||
11534 | } | ||||||
11535 | |||||||
11536 | // Check the deduced type is valid for a variable declaration. | ||||||
11537 | CheckVariableDeclarationType(VDecl); | ||||||
11538 | return VDecl->isInvalidDecl(); | ||||||
11539 | } | ||||||
11540 | |||||||
11541 | void Sema::checkNonTrivialCUnionInInitializer(const Expr *Init, | ||||||
11542 | SourceLocation Loc) { | ||||||
11543 | if (auto *CE = dyn_cast<ConstantExpr>(Init)) | ||||||
11544 | Init = CE->getSubExpr(); | ||||||
11545 | |||||||
11546 | QualType InitType = Init->getType(); | ||||||
11547 | assert((InitType.hasNonTrivialToPrimitiveDefaultInitializeCUnion() ||(((InitType.hasNonTrivialToPrimitiveDefaultInitializeCUnion() || InitType.hasNonTrivialToPrimitiveCopyCUnion()) && "shouldn't be called if type doesn't have a non-trivial C struct" ) ? static_cast<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-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 11549, __PRETTY_FUNCTION__)) | ||||||
11548 | InitType.hasNonTrivialToPrimitiveCopyCUnion()) &&(((InitType.hasNonTrivialToPrimitiveDefaultInitializeCUnion() || InitType.hasNonTrivialToPrimitiveCopyCUnion()) && "shouldn't be called if type doesn't have a non-trivial C struct" ) ? static_cast<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-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 11549, __PRETTY_FUNCTION__)) | ||||||
11549 | "shouldn't be called if type doesn't have a non-trivial C struct")(((InitType.hasNonTrivialToPrimitiveDefaultInitializeCUnion() || InitType.hasNonTrivialToPrimitiveCopyCUnion()) && "shouldn't be called if type doesn't have a non-trivial C struct" ) ? static_cast<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-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 11549, __PRETTY_FUNCTION__)); | ||||||
11550 | if (auto *ILE = dyn_cast<InitListExpr>(Init)) { | ||||||
11551 | for (auto I : ILE->inits()) { | ||||||
11552 | if (!I->getType().hasNonTrivialToPrimitiveDefaultInitializeCUnion() && | ||||||
11553 | !I->getType().hasNonTrivialToPrimitiveCopyCUnion()) | ||||||
11554 | continue; | ||||||
11555 | SourceLocation SL = I->getExprLoc(); | ||||||
11556 | checkNonTrivialCUnionInInitializer(I, SL.isValid() ? SL : Loc); | ||||||
11557 | } | ||||||
11558 | return; | ||||||
11559 | } | ||||||
11560 | |||||||
11561 | if (isa<ImplicitValueInitExpr>(Init)) { | ||||||
11562 | if (InitType.hasNonTrivialToPrimitiveDefaultInitializeCUnion()) | ||||||
11563 | checkNonTrivialCUnion(InitType, Loc, NTCUC_DefaultInitializedObject, | ||||||
11564 | NTCUK_Init); | ||||||
11565 | } else { | ||||||
11566 | // Assume all other explicit initializers involving copying some existing | ||||||
11567 | // object. | ||||||
11568 | // TODO: ignore any explicit initializers where we can guarantee | ||||||
11569 | // copy-elision. | ||||||
11570 | if (InitType.hasNonTrivialToPrimitiveCopyCUnion()) | ||||||
11571 | checkNonTrivialCUnion(InitType, Loc, NTCUC_CopyInit, NTCUK_Copy); | ||||||
11572 | } | ||||||
11573 | } | ||||||
11574 | |||||||
11575 | namespace { | ||||||
11576 | |||||||
11577 | bool shouldIgnoreForRecordTriviality(const FieldDecl *FD) { | ||||||
11578 | // Ignore unavailable fields. A field can be marked as unavailable explicitly | ||||||
11579 | // in the source code or implicitly by the compiler if it is in a union | ||||||
11580 | // defined in a system header and has non-trivial ObjC ownership | ||||||
11581 | // qualifications. We don't want those fields to participate in determining | ||||||
11582 | // whether the containing union is non-trivial. | ||||||
11583 | return FD->hasAttr<UnavailableAttr>(); | ||||||
11584 | } | ||||||
11585 | |||||||
11586 | struct DiagNonTrivalCUnionDefaultInitializeVisitor | ||||||
11587 | : DefaultInitializedTypeVisitor<DiagNonTrivalCUnionDefaultInitializeVisitor, | ||||||
11588 | void> { | ||||||
11589 | using Super = | ||||||
11590 | DefaultInitializedTypeVisitor<DiagNonTrivalCUnionDefaultInitializeVisitor, | ||||||
11591 | void>; | ||||||
11592 | |||||||
11593 | DiagNonTrivalCUnionDefaultInitializeVisitor( | ||||||
11594 | QualType OrigTy, SourceLocation OrigLoc, | ||||||
11595 | Sema::NonTrivialCUnionContext UseContext, Sema &S) | ||||||
11596 | : OrigTy(OrigTy), OrigLoc(OrigLoc), UseContext(UseContext), S(S) {} | ||||||
11597 | |||||||
11598 | void visitWithKind(QualType::PrimitiveDefaultInitializeKind PDIK, QualType QT, | ||||||
11599 | const FieldDecl *FD, bool InNonTrivialUnion) { | ||||||
11600 | if (const auto *AT = S.Context.getAsArrayType(QT)) | ||||||
11601 | return this->asDerived().visit(S.Context.getBaseElementType(AT), FD, | ||||||
11602 | InNonTrivialUnion); | ||||||
11603 | return Super::visitWithKind(PDIK, QT, FD, InNonTrivialUnion); | ||||||
11604 | } | ||||||
11605 | |||||||
11606 | void visitARCStrong(QualType QT, const FieldDecl *FD, | ||||||
11607 | bool InNonTrivialUnion) { | ||||||
11608 | if (InNonTrivialUnion) | ||||||
11609 | S.Diag(FD->getLocation(), diag::note_non_trivial_c_union) | ||||||
11610 | << 1 << 0 << QT << FD->getName(); | ||||||
11611 | } | ||||||
11612 | |||||||
11613 | void visitARCWeak(QualType QT, const FieldDecl *FD, bool InNonTrivialUnion) { | ||||||
11614 | if (InNonTrivialUnion) | ||||||
11615 | S.Diag(FD->getLocation(), diag::note_non_trivial_c_union) | ||||||
11616 | << 1 << 0 << QT << FD->getName(); | ||||||
11617 | } | ||||||
11618 | |||||||
11619 | void visitStruct(QualType QT, const FieldDecl *FD, bool InNonTrivialUnion) { | ||||||
11620 | const RecordDecl *RD = QT->castAs<RecordType>()->getDecl(); | ||||||
11621 | if (RD->isUnion()) { | ||||||
11622 | if (OrigLoc.isValid()) { | ||||||
11623 | bool IsUnion = false; | ||||||
11624 | if (auto *OrigRD = OrigTy->getAsRecordDecl()) | ||||||
11625 | IsUnion = OrigRD->isUnion(); | ||||||
11626 | S.Diag(OrigLoc, diag::err_non_trivial_c_union_in_invalid_context) | ||||||
11627 | << 0 << OrigTy << IsUnion << UseContext; | ||||||
11628 | // Reset OrigLoc so that this diagnostic is emitted only once. | ||||||
11629 | OrigLoc = SourceLocation(); | ||||||
11630 | } | ||||||
11631 | InNonTrivialUnion = true; | ||||||
11632 | } | ||||||
11633 | |||||||
11634 | if (InNonTrivialUnion) | ||||||
11635 | S.Diag(RD->getLocation(), diag::note_non_trivial_c_union) | ||||||
11636 | << 0 << 0 << QT.getUnqualifiedType() << ""; | ||||||
11637 | |||||||
11638 | for (const FieldDecl *FD : RD->fields()) | ||||||
11639 | if (!shouldIgnoreForRecordTriviality(FD)) | ||||||
11640 | asDerived().visit(FD->getType(), FD, InNonTrivialUnion); | ||||||
11641 | } | ||||||
11642 | |||||||
11643 | void visitTrivial(QualType QT, const FieldDecl *FD, bool InNonTrivialUnion) {} | ||||||
11644 | |||||||
11645 | // The non-trivial C union type or the struct/union type that contains a | ||||||
11646 | // non-trivial C union. | ||||||
11647 | QualType OrigTy; | ||||||
11648 | SourceLocation OrigLoc; | ||||||
11649 | Sema::NonTrivialCUnionContext UseContext; | ||||||
11650 | Sema &S; | ||||||
11651 | }; | ||||||
11652 | |||||||
11653 | struct DiagNonTrivalCUnionDestructedTypeVisitor | ||||||
11654 | : DestructedTypeVisitor<DiagNonTrivalCUnionDestructedTypeVisitor, void> { | ||||||
11655 | using Super = | ||||||
11656 | DestructedTypeVisitor<DiagNonTrivalCUnionDestructedTypeVisitor, void>; | ||||||
11657 | |||||||
11658 | DiagNonTrivalCUnionDestructedTypeVisitor( | ||||||
11659 | QualType OrigTy, SourceLocation OrigLoc, | ||||||
11660 | Sema::NonTrivialCUnionContext UseContext, Sema &S) | ||||||
11661 | : OrigTy(OrigTy), OrigLoc(OrigLoc), UseContext(UseContext), S(S) {} | ||||||
11662 | |||||||
11663 | void visitWithKind(QualType::DestructionKind DK, QualType QT, | ||||||
11664 | const FieldDecl *FD, bool InNonTrivialUnion) { | ||||||
11665 | if (const auto *AT = S.Context.getAsArrayType(QT)) | ||||||
11666 | return this->asDerived().visit(S.Context.getBaseElementType(AT), FD, | ||||||
11667 | InNonTrivialUnion); | ||||||
11668 | return Super::visitWithKind(DK, QT, FD, InNonTrivialUnion); | ||||||
11669 | } | ||||||
11670 | |||||||
11671 | void visitARCStrong(QualType QT, const FieldDecl *FD, | ||||||
11672 | bool InNonTrivialUnion) { | ||||||
11673 | if (InNonTrivialUnion) | ||||||
11674 | S.Diag(FD->getLocation(), diag::note_non_trivial_c_union) | ||||||
11675 | << 1 << 1 << QT << FD->getName(); | ||||||
11676 | } | ||||||
11677 | |||||||
11678 | void visitARCWeak(QualType QT, const FieldDecl *FD, bool InNonTrivialUnion) { | ||||||
11679 | if (InNonTrivialUnion) | ||||||
11680 | S.Diag(FD->getLocation(), diag::note_non_trivial_c_union) | ||||||
11681 | << 1 << 1 << QT << FD->getName(); | ||||||
11682 | } | ||||||
11683 | |||||||
11684 | void visitStruct(QualType QT, const FieldDecl *FD, bool InNonTrivialUnion) { | ||||||
11685 | const RecordDecl *RD = QT->castAs<RecordType>()->getDecl(); | ||||||
11686 | if (RD->isUnion()) { | ||||||
11687 | if (OrigLoc.isValid()) { | ||||||
11688 | bool IsUnion = false; | ||||||
11689 | if (auto *OrigRD = OrigTy->getAsRecordDecl()) | ||||||
11690 | IsUnion = OrigRD->isUnion(); | ||||||
11691 | S.Diag(OrigLoc, diag::err_non_trivial_c_union_in_invalid_context) | ||||||
11692 | << 1 << OrigTy << IsUnion << UseContext; | ||||||
11693 | // Reset OrigLoc so that this diagnostic is emitted only once. | ||||||
11694 | OrigLoc = SourceLocation(); | ||||||
11695 | } | ||||||
11696 | InNonTrivialUnion = true; | ||||||
11697 | } | ||||||
11698 | |||||||
11699 | if (InNonTrivialUnion) | ||||||
11700 | S.Diag(RD->getLocation(), diag::note_non_trivial_c_union) | ||||||
11701 | << 0 << 1 << QT.getUnqualifiedType() << ""; | ||||||
11702 | |||||||
11703 | for (const FieldDecl *FD : RD->fields()) | ||||||
11704 | if (!shouldIgnoreForRecordTriviality(FD)) | ||||||
11705 | asDerived().visit(FD->getType(), FD, InNonTrivialUnion); | ||||||
11706 | } | ||||||
11707 | |||||||
11708 | void visitTrivial(QualType QT, const FieldDecl *FD, bool InNonTrivialUnion) {} | ||||||
11709 | void visitCXXDestructor(QualType QT, const FieldDecl *FD, | ||||||
11710 | bool InNonTrivialUnion) {} | ||||||
11711 | |||||||
11712 | // The non-trivial C union type or the struct/union type that contains a | ||||||
11713 | // non-trivial C union. | ||||||
11714 | QualType OrigTy; | ||||||
11715 | SourceLocation OrigLoc; | ||||||
11716 | Sema::NonTrivialCUnionContext UseContext; | ||||||
11717 | Sema &S; | ||||||
11718 | }; | ||||||
11719 | |||||||
11720 | struct DiagNonTrivalCUnionCopyVisitor | ||||||
11721 | : CopiedTypeVisitor<DiagNonTrivalCUnionCopyVisitor, false, void> { | ||||||
11722 | using Super = CopiedTypeVisitor<DiagNonTrivalCUnionCopyVisitor, false, void>; | ||||||
11723 | |||||||
11724 | DiagNonTrivalCUnionCopyVisitor(QualType OrigTy, SourceLocation OrigLoc, | ||||||
11725 | Sema::NonTrivialCUnionContext UseContext, | ||||||
11726 | Sema &S) | ||||||
11727 | : OrigTy(OrigTy), OrigLoc(OrigLoc), UseContext(UseContext), S(S) {} | ||||||
11728 | |||||||
11729 | void visitWithKind(QualType::PrimitiveCopyKind PCK, QualType QT, | ||||||
11730 | const FieldDecl *FD, bool InNonTrivialUnion) { | ||||||
11731 | if (const auto *AT = S.Context.getAsArrayType(QT)) | ||||||
11732 | return this->asDerived().visit(S.Context.getBaseElementType(AT), FD, | ||||||
11733 | InNonTrivialUnion); | ||||||
11734 | return Super::visitWithKind(PCK, QT, FD, InNonTrivialUnion); | ||||||
11735 | } | ||||||
11736 | |||||||
11737 | void visitARCStrong(QualType QT, const FieldDecl *FD, | ||||||
11738 | bool InNonTrivialUnion) { | ||||||
11739 | if (InNonTrivialUnion) | ||||||
11740 | S.Diag(FD->getLocation(), diag::note_non_trivial_c_union) | ||||||
11741 | << 1 << 2 << QT << FD->getName(); | ||||||
11742 | } | ||||||
11743 | |||||||
11744 | void visitARCWeak(QualType QT, const FieldDecl *FD, bool InNonTrivialUnion) { | ||||||
11745 | if (InNonTrivialUnion) | ||||||
11746 | S.Diag(FD->getLocation(), diag::note_non_trivial_c_union) | ||||||
11747 | << 1 << 2 << QT << FD->getName(); | ||||||
11748 | } | ||||||
11749 | |||||||
11750 | void visitStruct(QualType QT, const FieldDecl *FD, bool InNonTrivialUnion) { | ||||||
11751 | const RecordDecl *RD = QT->castAs<RecordType>()->getDecl(); | ||||||
11752 | if (RD->isUnion()) { | ||||||
11753 | if (OrigLoc.isValid()) { | ||||||
11754 | bool IsUnion = false; | ||||||
11755 | if (auto *OrigRD = OrigTy->getAsRecordDecl()) | ||||||
11756 | IsUnion = OrigRD->isUnion(); | ||||||
11757 | S.Diag(OrigLoc, diag::err_non_trivial_c_union_in_invalid_context) | ||||||
11758 | << 2 << OrigTy << IsUnion << UseContext; | ||||||
11759 | // Reset OrigLoc so that this diagnostic is emitted only once. | ||||||
11760 | OrigLoc = SourceLocation(); | ||||||
11761 | } | ||||||
11762 | InNonTrivialUnion = true; | ||||||
11763 | } | ||||||
11764 | |||||||
11765 | if (InNonTrivialUnion) | ||||||
11766 | S.Diag(RD->getLocation(), diag::note_non_trivial_c_union) | ||||||
11767 | << 0 << 2 << QT.getUnqualifiedType() << ""; | ||||||
11768 | |||||||
11769 | for (const FieldDecl *FD : RD->fields()) | ||||||
11770 | if (!shouldIgnoreForRecordTriviality(FD)) | ||||||
11771 | asDerived().visit(FD->getType(), FD, InNonTrivialUnion); | ||||||
11772 | } | ||||||
11773 | |||||||
11774 | void preVisit(QualType::PrimitiveCopyKind PCK, QualType QT, | ||||||
11775 | const FieldDecl *FD, bool InNonTrivialUnion) {} | ||||||
11776 | void visitTrivial(QualType QT, const FieldDecl *FD, bool InNonTrivialUnion) {} | ||||||
11777 | void visitVolatileTrivial(QualType QT, const FieldDecl *FD, | ||||||
11778 | bool InNonTrivialUnion) {} | ||||||
11779 | |||||||
11780 | // The non-trivial C union type or the struct/union type that contains a | ||||||
11781 | // non-trivial C union. | ||||||
11782 | QualType OrigTy; | ||||||
11783 | SourceLocation OrigLoc; | ||||||
11784 | Sema::NonTrivialCUnionContext UseContext; | ||||||
11785 | Sema &S; | ||||||
11786 | }; | ||||||
11787 | |||||||
11788 | } // namespace | ||||||
11789 | |||||||
11790 | void Sema::checkNonTrivialCUnion(QualType QT, SourceLocation Loc, | ||||||
11791 | NonTrivialCUnionContext UseContext, | ||||||
11792 | unsigned NonTrivialKind) { | ||||||
11793 | assert((QT.hasNonTrivialToPrimitiveDefaultInitializeCUnion() ||(((QT.hasNonTrivialToPrimitiveDefaultInitializeCUnion() || QT .hasNonTrivialToPrimitiveDestructCUnion() || QT.hasNonTrivialToPrimitiveCopyCUnion ()) && "shouldn't be called if type doesn't have a non-trivial C union" ) ? static_cast<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-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 11796, __PRETTY_FUNCTION__)) | ||||||
11794 | QT.hasNonTrivialToPrimitiveDestructCUnion() ||(((QT.hasNonTrivialToPrimitiveDefaultInitializeCUnion() || QT .hasNonTrivialToPrimitiveDestructCUnion() || QT.hasNonTrivialToPrimitiveCopyCUnion ()) && "shouldn't be called if type doesn't have a non-trivial C union" ) ? static_cast<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-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 11796, __PRETTY_FUNCTION__)) | ||||||
11795 | QT.hasNonTrivialToPrimitiveCopyCUnion()) &&(((QT.hasNonTrivialToPrimitiveDefaultInitializeCUnion() || QT .hasNonTrivialToPrimitiveDestructCUnion() || QT.hasNonTrivialToPrimitiveCopyCUnion ()) && "shouldn't be called if type doesn't have a non-trivial C union" ) ? static_cast<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-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 11796, __PRETTY_FUNCTION__)) | ||||||
11796 | "shouldn't be called if type doesn't have a non-trivial C union")(((QT.hasNonTrivialToPrimitiveDefaultInitializeCUnion() || QT .hasNonTrivialToPrimitiveDestructCUnion() || QT.hasNonTrivialToPrimitiveCopyCUnion ()) && "shouldn't be called if type doesn't have a non-trivial C union" ) ? static_cast<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-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 11796, __PRETTY_FUNCTION__)); | ||||||
11797 | |||||||
11798 | if ((NonTrivialKind & NTCUK_Init) && | ||||||
11799 | QT.hasNonTrivialToPrimitiveDefaultInitializeCUnion()) | ||||||
11800 | DiagNonTrivalCUnionDefaultInitializeVisitor(QT, Loc, UseContext, *this) | ||||||
11801 | .visit(QT, nullptr, false); | ||||||
11802 | if ((NonTrivialKind & NTCUK_Destruct) && | ||||||
11803 | QT.hasNonTrivialToPrimitiveDestructCUnion()) | ||||||
11804 | DiagNonTrivalCUnionDestructedTypeVisitor(QT, Loc, UseContext, *this) | ||||||
11805 | .visit(QT, nullptr, false); | ||||||
11806 | if ((NonTrivialKind & NTCUK_Copy) && QT.hasNonTrivialToPrimitiveCopyCUnion()) | ||||||
11807 | DiagNonTrivalCUnionCopyVisitor(QT, Loc, UseContext, *this) | ||||||
11808 | .visit(QT, nullptr, false); | ||||||
11809 | } | ||||||
11810 | |||||||
11811 | /// AddInitializerToDecl - Adds the initializer Init to the | ||||||
11812 | /// declaration dcl. If DirectInit is true, this is C++ direct | ||||||
11813 | /// initialization rather than copy initialization. | ||||||
11814 | void Sema::AddInitializerToDecl(Decl *RealDecl, Expr *Init, bool DirectInit) { | ||||||
11815 | // If there is no declaration, there was an error parsing it. Just ignore | ||||||
11816 | // the initializer. | ||||||
11817 | if (!RealDecl || RealDecl->isInvalidDecl()) { | ||||||
11818 | CorrectDelayedTyposInExpr(Init, dyn_cast_or_null<VarDecl>(RealDecl)); | ||||||
11819 | return; | ||||||
11820 | } | ||||||
11821 | |||||||
11822 | if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(RealDecl)) { | ||||||
11823 | // Pure-specifiers are handled in ActOnPureSpecifier. | ||||||
11824 | Diag(Method->getLocation(), diag::err_member_function_initialization) | ||||||
11825 | << Method->getDeclName() << Init->getSourceRange(); | ||||||
11826 | Method->setInvalidDecl(); | ||||||
11827 | return; | ||||||
11828 | } | ||||||
11829 | |||||||
11830 | VarDecl *VDecl = dyn_cast<VarDecl>(RealDecl); | ||||||
11831 | if (!VDecl) { | ||||||
11832 | assert(!isa<FieldDecl>(RealDecl) && "field init shouldn't get here")((!isa<FieldDecl>(RealDecl) && "field init shouldn't get here" ) ? static_cast<void> (0) : __assert_fail ("!isa<FieldDecl>(RealDecl) && \"field init shouldn't get here\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 11832, __PRETTY_FUNCTION__)); | ||||||
11833 | Diag(RealDecl->getLocation(), diag::err_illegal_initializer); | ||||||
11834 | RealDecl->setInvalidDecl(); | ||||||
11835 | return; | ||||||
11836 | } | ||||||
11837 | |||||||
11838 | // C++11 [decl.spec.auto]p6. Deduce the type which 'auto' stands in for. | ||||||
11839 | if (VDecl->getType()->isUndeducedType()) { | ||||||
11840 | // Attempt typo correction early so that the type of the init expression can | ||||||
11841 | // be deduced based on the chosen correction if the original init contains a | ||||||
11842 | // TypoExpr. | ||||||
11843 | ExprResult Res = CorrectDelayedTyposInExpr(Init, VDecl); | ||||||
11844 | if (!Res.isUsable()) { | ||||||
11845 | RealDecl->setInvalidDecl(); | ||||||
11846 | return; | ||||||
11847 | } | ||||||
11848 | Init = Res.get(); | ||||||
11849 | |||||||
11850 | if (DeduceVariableDeclarationType(VDecl, DirectInit, Init)) | ||||||
11851 | return; | ||||||
11852 | } | ||||||
11853 | |||||||
11854 | // dllimport cannot be used on variable definitions. | ||||||
11855 | if (VDecl->hasAttr<DLLImportAttr>() && !VDecl->isStaticDataMember()) { | ||||||
11856 | Diag(VDecl->getLocation(), diag::err_attribute_dllimport_data_definition); | ||||||
11857 | VDecl->setInvalidDecl(); | ||||||
11858 | return; | ||||||
11859 | } | ||||||
11860 | |||||||
11861 | if (VDecl->isLocalVarDecl() && VDecl->hasExternalStorage()) { | ||||||
11862 | // C99 6.7.8p5. C++ has no such restriction, but that is a defect. | ||||||
11863 | Diag(VDecl->getLocation(), diag::err_block_extern_cant_init); | ||||||
11864 | VDecl->setInvalidDecl(); | ||||||
11865 | return; | ||||||
11866 | } | ||||||
11867 | |||||||
11868 | if (!VDecl->getType()->isDependentType()) { | ||||||
11869 | // A definition must end up with a complete type, which means it must be | ||||||
11870 | // complete with the restriction that an array type might be completed by | ||||||
11871 | // the initializer; note that later code assumes this restriction. | ||||||
11872 | QualType BaseDeclType = VDecl->getType(); | ||||||
11873 | if (const ArrayType *Array = Context.getAsIncompleteArrayType(BaseDeclType)) | ||||||
11874 | BaseDeclType = Array->getElementType(); | ||||||
11875 | if (RequireCompleteType(VDecl->getLocation(), BaseDeclType, | ||||||
11876 | diag::err_typecheck_decl_incomplete_type)) { | ||||||
11877 | RealDecl->setInvalidDecl(); | ||||||
11878 | return; | ||||||
11879 | } | ||||||
11880 | |||||||
11881 | // The variable can not have an abstract class type. | ||||||
11882 | if (RequireNonAbstractType(VDecl->getLocation(), VDecl->getType(), | ||||||
11883 | diag::err_abstract_type_in_decl, | ||||||
11884 | AbstractVariableType)) | ||||||
11885 | VDecl->setInvalidDecl(); | ||||||
11886 | } | ||||||
11887 | |||||||
11888 | // If adding the initializer will turn this declaration into a definition, | ||||||
11889 | // and we already have a definition for this variable, diagnose or otherwise | ||||||
11890 | // handle the situation. | ||||||
11891 | VarDecl *Def; | ||||||
11892 | if ((Def = VDecl->getDefinition()) && Def != VDecl && | ||||||
11893 | (!VDecl->isStaticDataMember() || VDecl->isOutOfLine()) && | ||||||
11894 | !VDecl->isThisDeclarationADemotedDefinition() && | ||||||
11895 | checkVarDeclRedefinition(Def, VDecl)) | ||||||
11896 | return; | ||||||
11897 | |||||||
11898 | if (getLangOpts().CPlusPlus) { | ||||||
11899 | // C++ [class.static.data]p4 | ||||||
11900 | // If a static data member is of const integral or const | ||||||
11901 | // enumeration type, its declaration in the class definition can | ||||||
11902 | // specify a constant-initializer which shall be an integral | ||||||
11903 | // constant expression (5.19). In that case, the member can appear | ||||||
11904 | // in integral constant expressions. The member shall still be | ||||||
11905 | // defined in a namespace scope if it is used in the program and the | ||||||
11906 | // namespace scope definition shall not contain an initializer. | ||||||
11907 | // | ||||||
11908 | // We already performed a redefinition check above, but for static | ||||||
11909 | // data members we also need to check whether there was an in-class | ||||||
11910 | // declaration with an initializer. | ||||||
11911 | if (VDecl->isStaticDataMember() && VDecl->getCanonicalDecl()->hasInit()) { | ||||||
11912 | Diag(Init->getExprLoc(), diag::err_static_data_member_reinitialization) | ||||||
11913 | << VDecl->getDeclName(); | ||||||
11914 | Diag(VDecl->getCanonicalDecl()->getInit()->getExprLoc(), | ||||||
11915 | diag::note_previous_initializer) | ||||||
11916 | << 0; | ||||||
11917 | return; | ||||||
11918 | } | ||||||
11919 | |||||||
11920 | if (VDecl->hasLocalStorage()) | ||||||
11921 | setFunctionHasBranchProtectedScope(); | ||||||
11922 | |||||||
11923 | if (DiagnoseUnexpandedParameterPack(Init, UPPC_Initializer)) { | ||||||
11924 | VDecl->setInvalidDecl(); | ||||||
11925 | return; | ||||||
11926 | } | ||||||
11927 | } | ||||||
11928 | |||||||
11929 | // OpenCL 1.1 6.5.2: "Variables allocated in the __local address space inside | ||||||
11930 | // a kernel function cannot be initialized." | ||||||
11931 | if (VDecl->getType().getAddressSpace() == LangAS::opencl_local) { | ||||||
11932 | Diag(VDecl->getLocation(), diag::err_local_cant_init); | ||||||
11933 | VDecl->setInvalidDecl(); | ||||||
11934 | return; | ||||||
11935 | } | ||||||
11936 | |||||||
11937 | // Get the decls type and save a reference for later, since | ||||||
11938 | // CheckInitializerTypes may change it. | ||||||
11939 | QualType DclT = VDecl->getType(), SavT = DclT; | ||||||
11940 | |||||||
11941 | // Expressions default to 'id' when we're in a debugger | ||||||
11942 | // and we are assigning it to a variable of Objective-C pointer type. | ||||||
11943 | if (getLangOpts().DebuggerCastResultToId && DclT->isObjCObjectPointerType() && | ||||||
11944 | Init->getType() == Context.UnknownAnyTy) { | ||||||
11945 | ExprResult Result = forceUnknownAnyToType(Init, Context.getObjCIdType()); | ||||||
11946 | if (Result.isInvalid()) { | ||||||
11947 | VDecl->setInvalidDecl(); | ||||||
11948 | return; | ||||||
11949 | } | ||||||
11950 | Init = Result.get(); | ||||||
11951 | } | ||||||
11952 | |||||||
11953 | // Perform the initialization. | ||||||
11954 | ParenListExpr *CXXDirectInit = dyn_cast<ParenListExpr>(Init); | ||||||
11955 | if (!VDecl->isInvalidDecl()) { | ||||||
11956 | InitializedEntity Entity = InitializedEntity::InitializeVariable(VDecl); | ||||||
11957 | InitializationKind Kind = InitializationKind::CreateForInit( | ||||||
11958 | VDecl->getLocation(), DirectInit, Init); | ||||||
11959 | |||||||
11960 | MultiExprArg Args = Init; | ||||||
11961 | if (CXXDirectInit) | ||||||
11962 | Args = MultiExprArg(CXXDirectInit->getExprs(), | ||||||
11963 | CXXDirectInit->getNumExprs()); | ||||||
11964 | |||||||
11965 | // Try to correct any TypoExprs in the initialization arguments. | ||||||
11966 | for (size_t Idx = 0; Idx < Args.size(); ++Idx) { | ||||||
11967 | ExprResult Res = CorrectDelayedTyposInExpr( | ||||||
11968 | Args[Idx], VDecl, [this, Entity, Kind](Expr *E) { | ||||||
11969 | InitializationSequence Init(*this, Entity, Kind, MultiExprArg(E)); | ||||||
11970 | return Init.Failed() ? ExprError() : E; | ||||||
11971 | }); | ||||||
11972 | if (Res.isInvalid()) { | ||||||
11973 | VDecl->setInvalidDecl(); | ||||||
11974 | } else if (Res.get() != Args[Idx]) { | ||||||
11975 | Args[Idx] = Res.get(); | ||||||
11976 | } | ||||||
11977 | } | ||||||
11978 | if (VDecl->isInvalidDecl()) | ||||||
11979 | return; | ||||||
11980 | |||||||
11981 | InitializationSequence InitSeq(*this, Entity, Kind, Args, | ||||||
11982 | /*TopLevelOfInitList=*/false, | ||||||
11983 | /*TreatUnavailableAsInvalid=*/false); | ||||||
11984 | ExprResult Result = InitSeq.Perform(*this, Entity, Kind, Args, &DclT); | ||||||
11985 | if (Result.isInvalid()) { | ||||||
11986 | VDecl->setInvalidDecl(); | ||||||
11987 | return; | ||||||
11988 | } | ||||||
11989 | |||||||
11990 | Init = Result.getAs<Expr>(); | ||||||
11991 | } | ||||||
11992 | |||||||
11993 | // Check for self-references within variable initializers. | ||||||
11994 | // Variables declared within a function/method body (except for references) | ||||||
11995 | // are handled by a dataflow analysis. | ||||||
11996 | // This is undefined behavior in C++, but valid in C. | ||||||
11997 | if (getLangOpts().CPlusPlus) { | ||||||
11998 | if (!VDecl->hasLocalStorage() || VDecl->getType()->isRecordType() || | ||||||
11999 | VDecl->getType()->isReferenceType()) { | ||||||
12000 | CheckSelfReference(*this, RealDecl, Init, DirectInit); | ||||||
12001 | } | ||||||
12002 | } | ||||||
12003 | |||||||
12004 | // If the type changed, it means we had an incomplete type that was | ||||||
12005 | // completed by the initializer. For example: | ||||||
12006 | // int ary[] = { 1, 3, 5 }; | ||||||
12007 | // "ary" transitions from an IncompleteArrayType to a ConstantArrayType. | ||||||
12008 | if (!VDecl->isInvalidDecl() && (DclT != SavT)) | ||||||
12009 | VDecl->setType(DclT); | ||||||
12010 | |||||||
12011 | if (!VDecl->isInvalidDecl()) { | ||||||
12012 | checkUnsafeAssigns(VDecl->getLocation(), VDecl->getType(), Init); | ||||||
12013 | |||||||
12014 | if (VDecl->hasAttr<BlocksAttr>()) | ||||||
12015 | checkRetainCycles(VDecl, Init); | ||||||
12016 | |||||||
12017 | // It is safe to assign a weak reference into a strong variable. | ||||||
12018 | // Although this code can still have problems: | ||||||
12019 | // id x = self.weakProp; | ||||||
12020 | // id y = self.weakProp; | ||||||
12021 | // we do not warn to warn spuriously when 'x' and 'y' are on separate | ||||||
12022 | // paths through the function. This should be revisited if | ||||||
12023 | // -Wrepeated-use-of-weak is made flow-sensitive. | ||||||
12024 | if (FunctionScopeInfo *FSI = getCurFunction()) | ||||||
12025 | if ((VDecl->getType().getObjCLifetime() == Qualifiers::OCL_Strong || | ||||||
12026 | VDecl->getType().isNonWeakInMRRWithObjCWeak(Context)) && | ||||||
12027 | !Diags.isIgnored(diag::warn_arc_repeated_use_of_weak, | ||||||
12028 | Init->getBeginLoc())) | ||||||
12029 | FSI->markSafeWeakUse(Init); | ||||||
12030 | } | ||||||
12031 | |||||||
12032 | // The initialization is usually a full-expression. | ||||||
12033 | // | ||||||
12034 | // FIXME: If this is a braced initialization of an aggregate, it is not | ||||||
12035 | // an expression, and each individual field initializer is a separate | ||||||
12036 | // full-expression. For instance, in: | ||||||
12037 | // | ||||||
12038 | // struct Temp { ~Temp(); }; | ||||||
12039 | // struct S { S(Temp); }; | ||||||
12040 | // struct T { S a, b; } t = { Temp(), Temp() } | ||||||
12041 | // | ||||||
12042 | // we should destroy the first Temp before constructing the second. | ||||||
12043 | ExprResult Result = | ||||||
12044 | ActOnFinishFullExpr(Init, VDecl->getLocation(), | ||||||
12045 | /*DiscardedValue*/ false, VDecl->isConstexpr()); | ||||||
12046 | if (Result.isInvalid()) { | ||||||
12047 | VDecl->setInvalidDecl(); | ||||||
12048 | return; | ||||||
12049 | } | ||||||
12050 | Init = Result.get(); | ||||||
12051 | |||||||
12052 | // Attach the initializer to the decl. | ||||||
12053 | VDecl->setInit(Init); | ||||||
12054 | |||||||
12055 | if (VDecl->isLocalVarDecl()) { | ||||||
12056 | // Don't check the initializer if the declaration is malformed. | ||||||
12057 | if (VDecl->isInvalidDecl()) { | ||||||
12058 | // do nothing | ||||||
12059 | |||||||
12060 | // OpenCL v1.2 s6.5.3: __constant locals must be constant-initialized. | ||||||
12061 | // This is true even in C++ for OpenCL. | ||||||
12062 | } else if (VDecl->getType().getAddressSpace() == LangAS::opencl_constant) { | ||||||
12063 | CheckForConstantInitializer(Init, DclT); | ||||||
12064 | |||||||
12065 | // Otherwise, C++ does not restrict the initializer. | ||||||
12066 | } else if (getLangOpts().CPlusPlus) { | ||||||
12067 | // do nothing | ||||||
12068 | |||||||
12069 | // C99 6.7.8p4: All the expressions in an initializer for an object that has | ||||||
12070 | // static storage duration shall be constant expressions or string literals. | ||||||
12071 | } else if (VDecl->getStorageClass() == SC_Static) { | ||||||
12072 | CheckForConstantInitializer(Init, DclT); | ||||||
12073 | |||||||
12074 | // C89 is stricter than C99 for aggregate initializers. | ||||||
12075 | // C89 6.5.7p3: All the expressions [...] in an initializer list | ||||||
12076 | // for an object that has aggregate or union type shall be | ||||||
12077 | // constant expressions. | ||||||
12078 | } else if (!getLangOpts().C99 && VDecl->getType()->isAggregateType() && | ||||||
12079 | isa<InitListExpr>(Init)) { | ||||||
12080 | const Expr *Culprit; | ||||||
12081 | if (!Init->isConstantInitializer(Context, false, &Culprit)) { | ||||||
12082 | Diag(Culprit->getExprLoc(), | ||||||
12083 | diag::ext_aggregate_init_not_constant) | ||||||
12084 | << Culprit->getSourceRange(); | ||||||
12085 | } | ||||||
12086 | } | ||||||
12087 | |||||||
12088 | if (auto *E = dyn_cast<ExprWithCleanups>(Init)) | ||||||
12089 | if (auto *BE = dyn_cast<BlockExpr>(E->getSubExpr()->IgnoreParens())) | ||||||
12090 | if (VDecl->hasLocalStorage()) | ||||||
12091 | BE->getBlockDecl()->setCanAvoidCopyToHeap(); | ||||||
12092 | } else if (VDecl->isStaticDataMember() && !VDecl->isInline() && | ||||||
12093 | VDecl->getLexicalDeclContext()->isRecord()) { | ||||||
12094 | // This is an in-class initialization for a static data member, e.g., | ||||||
12095 | // | ||||||
12096 | // struct S { | ||||||
12097 | // static const int value = 17; | ||||||
12098 | // }; | ||||||
12099 | |||||||
12100 | // C++ [class.mem]p4: | ||||||
12101 | // A member-declarator can contain a constant-initializer only | ||||||
12102 | // if it declares a static member (9.4) of const integral or | ||||||
12103 | // const enumeration type, see 9.4.2. | ||||||
12104 | // | ||||||
12105 | // C++11 [class.static.data]p3: | ||||||
12106 | // If a non-volatile non-inline const static data member is of integral | ||||||
12107 | // or enumeration type, its declaration in the class definition can | ||||||
12108 | // specify a brace-or-equal-initializer in which every initializer-clause | ||||||
12109 | // that is an assignment-expression is a constant expression. A static | ||||||
12110 | // data member of literal type can be declared in the class definition | ||||||
12111 | // with the constexpr specifier; if so, its declaration shall specify a | ||||||
12112 | // brace-or-equal-initializer in which every initializer-clause that is | ||||||
12113 | // an assignment-expression is a constant expression. | ||||||
12114 | |||||||
12115 | // Do nothing on dependent types. | ||||||
12116 | if (DclT->isDependentType()) { | ||||||
12117 | |||||||
12118 | // Allow any 'static constexpr' members, whether or not they are of literal | ||||||
12119 | // type. We separately check that every constexpr variable is of literal | ||||||
12120 | // type. | ||||||
12121 | } else if (VDecl->isConstexpr()) { | ||||||
12122 | |||||||
12123 | // Require constness. | ||||||
12124 | } else if (!DclT.isConstQualified()) { | ||||||
12125 | Diag(VDecl->getLocation(), diag::err_in_class_initializer_non_const) | ||||||
12126 | << Init->getSourceRange(); | ||||||
12127 | VDecl->setInvalidDecl(); | ||||||
12128 | |||||||
12129 | // We allow integer constant expressions in all cases. | ||||||
12130 | } else if (DclT->isIntegralOrEnumerationType()) { | ||||||
12131 | // Check whether the expression is a constant expression. | ||||||
12132 | SourceLocation Loc; | ||||||
12133 | if (getLangOpts().CPlusPlus11 && DclT.isVolatileQualified()) | ||||||
12134 | // In C++11, a non-constexpr const static data member with an | ||||||
12135 | // in-class initializer cannot be volatile. | ||||||
12136 | Diag(VDecl->getLocation(), diag::err_in_class_initializer_volatile); | ||||||
12137 | else if (Init->isValueDependent()) | ||||||
12138 | ; // Nothing to check. | ||||||
12139 | else if (Init->isIntegerConstantExpr(Context, &Loc)) | ||||||
12140 | ; // Ok, it's an ICE! | ||||||
12141 | else if (Init->getType()->isScopedEnumeralType() && | ||||||
12142 | Init->isCXX11ConstantExpr(Context)) | ||||||
12143 | ; // Ok, it is a scoped-enum constant expression. | ||||||
12144 | else if (Init->isEvaluatable(Context)) { | ||||||
12145 | // If we can constant fold the initializer through heroics, accept it, | ||||||
12146 | // but report this as a use of an extension for -pedantic. | ||||||
12147 | Diag(Loc, diag::ext_in_class_initializer_non_constant) | ||||||
12148 | << Init->getSourceRange(); | ||||||
12149 | } else { | ||||||
12150 | // Otherwise, this is some crazy unknown case. Report the issue at the | ||||||
12151 | // location provided by the isIntegerConstantExpr failed check. | ||||||
12152 | Diag(Loc, diag::err_in_class_initializer_non_constant) | ||||||
12153 | << Init->getSourceRange(); | ||||||
12154 | VDecl->setInvalidDecl(); | ||||||
12155 | } | ||||||
12156 | |||||||
12157 | // We allow foldable floating-point constants as an extension. | ||||||
12158 | } else if (DclT->isFloatingType()) { // also permits complex, which is ok | ||||||
12159 | // In C++98, this is a GNU extension. In C++11, it is not, but we support | ||||||
12160 | // it anyway and provide a fixit to add the 'constexpr'. | ||||||
12161 | if (getLangOpts().CPlusPlus11) { | ||||||
12162 | Diag(VDecl->getLocation(), | ||||||
12163 | diag::ext_in_class_initializer_float_type_cxx11) | ||||||
12164 | << DclT << Init->getSourceRange(); | ||||||
12165 | Diag(VDecl->getBeginLoc(), | ||||||
12166 | diag::note_in_class_initializer_float_type_cxx11) | ||||||
12167 | << FixItHint::CreateInsertion(VDecl->getBeginLoc(), "constexpr "); | ||||||
12168 | } else { | ||||||
12169 | Diag(VDecl->getLocation(), diag::ext_in_class_initializer_float_type) | ||||||
12170 | << DclT << Init->getSourceRange(); | ||||||
12171 | |||||||
12172 | if (!Init->isValueDependent() && !Init->isEvaluatable(Context)) { | ||||||
12173 | Diag(Init->getExprLoc(), diag::err_in_class_initializer_non_constant) | ||||||
12174 | << Init->getSourceRange(); | ||||||
12175 | VDecl->setInvalidDecl(); | ||||||
12176 | } | ||||||
12177 | } | ||||||
12178 | |||||||
12179 | // Suggest adding 'constexpr' in C++11 for literal types. | ||||||
12180 | } else if (getLangOpts().CPlusPlus11 && DclT->isLiteralType(Context)) { | ||||||
12181 | Diag(VDecl->getLocation(), diag::err_in_class_initializer_literal_type) | ||||||
12182 | << DclT << Init->getSourceRange() | ||||||
12183 | << FixItHint::CreateInsertion(VDecl->getBeginLoc(), "constexpr "); | ||||||
12184 | VDecl->setConstexpr(true); | ||||||
12185 | |||||||
12186 | } else { | ||||||
12187 | Diag(VDecl->getLocation(), diag::err_in_class_initializer_bad_type) | ||||||
12188 | << DclT << Init->getSourceRange(); | ||||||
12189 | VDecl->setInvalidDecl(); | ||||||
12190 | } | ||||||
12191 | } else if (VDecl->isFileVarDecl()) { | ||||||
12192 | // In C, extern is typically used to avoid tentative definitions when | ||||||
12193 | // declaring variables in headers, but adding an intializer makes it a | ||||||
12194 | // definition. This is somewhat confusing, so GCC and Clang both warn on it. | ||||||
12195 | // In C++, extern is often used to give implictly static const variables | ||||||
12196 | // external linkage, so don't warn in that case. If selectany is present, | ||||||
12197 | // this might be header code intended for C and C++ inclusion, so apply the | ||||||
12198 | // C++ rules. | ||||||
12199 | if (VDecl->getStorageClass() == SC_Extern && | ||||||
12200 | ((!getLangOpts().CPlusPlus && !VDecl->hasAttr<SelectAnyAttr>()) || | ||||||
12201 | !Context.getBaseElementType(VDecl->getType()).isConstQualified()) && | ||||||
12202 | !(getLangOpts().CPlusPlus && VDecl->isExternC()) && | ||||||
12203 | !isTemplateInstantiation(VDecl->getTemplateSpecializationKind())) | ||||||
12204 | Diag(VDecl->getLocation(), diag::warn_extern_init); | ||||||
12205 | |||||||
12206 | // In Microsoft C++ mode, a const variable defined in namespace scope has | ||||||
12207 | // external linkage by default if the variable is declared with | ||||||
12208 | // __declspec(dllexport). | ||||||
12209 | if (Context.getTargetInfo().getCXXABI().isMicrosoft() && | ||||||
12210 | getLangOpts().CPlusPlus && VDecl->getType().isConstQualified() && | ||||||
12211 | VDecl->hasAttr<DLLExportAttr>() && VDecl->getDefinition()) | ||||||
12212 | VDecl->setStorageClass(SC_Extern); | ||||||
12213 | |||||||
12214 | // C99 6.7.8p4. All file scoped initializers need to be constant. | ||||||
12215 | if (!getLangOpts().CPlusPlus && !VDecl->isInvalidDecl()) | ||||||
12216 | CheckForConstantInitializer(Init, DclT); | ||||||
12217 | } | ||||||
12218 | |||||||
12219 | QualType InitType = Init->getType(); | ||||||
12220 | if (!InitType.isNull() && | ||||||
12221 | (InitType.hasNonTrivialToPrimitiveDefaultInitializeCUnion() || | ||||||
12222 | InitType.hasNonTrivialToPrimitiveCopyCUnion())) | ||||||
12223 | checkNonTrivialCUnionInInitializer(Init, Init->getExprLoc()); | ||||||
12224 | |||||||
12225 | // We will represent direct-initialization similarly to copy-initialization: | ||||||
12226 | // int x(1); -as-> int x = 1; | ||||||
12227 | // ClassType x(a,b,c); -as-> ClassType x = ClassType(a,b,c); | ||||||
12228 | // | ||||||
12229 | // Clients that want to distinguish between the two forms, can check for | ||||||
12230 | // direct initializer using VarDecl::getInitStyle(). | ||||||
12231 | // A major benefit is that clients that don't particularly care about which | ||||||
12232 | // exactly form was it (like the CodeGen) can handle both cases without | ||||||
12233 | // special case code. | ||||||
12234 | |||||||
12235 | // C++ 8.5p11: | ||||||
12236 | // The form of initialization (using parentheses or '=') is generally | ||||||
12237 | // insignificant, but does matter when the entity being initialized has a | ||||||
12238 | // class type. | ||||||
12239 | if (CXXDirectInit) { | ||||||
12240 | assert(DirectInit && "Call-style initializer must be direct init.")((DirectInit && "Call-style initializer must be direct init." ) ? static_cast<void> (0) : __assert_fail ("DirectInit && \"Call-style initializer must be direct init.\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 12240, __PRETTY_FUNCTION__)); | ||||||
12241 | VDecl->setInitStyle(VarDecl::CallInit); | ||||||
12242 | } else if (DirectInit) { | ||||||
12243 | // This must be list-initialization. No other way is direct-initialization. | ||||||
12244 | VDecl->setInitStyle(VarDecl::ListInit); | ||||||
12245 | } | ||||||
12246 | |||||||
12247 | CheckCompleteVariableDeclaration(VDecl); | ||||||
12248 | } | ||||||
12249 | |||||||
12250 | /// ActOnInitializerError - Given that there was an error parsing an | ||||||
12251 | /// initializer for the given declaration, try to return to some form | ||||||
12252 | /// of sanity. | ||||||
12253 | void Sema::ActOnInitializerError(Decl *D) { | ||||||
12254 | // Our main concern here is re-establishing invariants like "a | ||||||
12255 | // variable's type is either dependent or complete". | ||||||
12256 | if (!D || D->isInvalidDecl()) return; | ||||||
12257 | |||||||
12258 | VarDecl *VD = dyn_cast<VarDecl>(D); | ||||||
12259 | if (!VD) return; | ||||||
12260 | |||||||
12261 | // Bindings are not usable if we can't make sense of the initializer. | ||||||
12262 | if (auto *DD = dyn_cast<DecompositionDecl>(D)) | ||||||
12263 | for (auto *BD : DD->bindings()) | ||||||
12264 | BD->setInvalidDecl(); | ||||||
12265 | |||||||
12266 | // Auto types are meaningless if we can't make sense of the initializer. | ||||||
12267 | if (ParsingInitForAutoVars.count(D)) { | ||||||
12268 | D->setInvalidDecl(); | ||||||
12269 | return; | ||||||
12270 | } | ||||||
12271 | |||||||
12272 | QualType Ty = VD->getType(); | ||||||
12273 | if (Ty->isDependentType()) return; | ||||||
12274 | |||||||
12275 | // Require a complete type. | ||||||
12276 | if (RequireCompleteType(VD->getLocation(), | ||||||
12277 | Context.getBaseElementType(Ty), | ||||||
12278 | diag::err_typecheck_decl_incomplete_type)) { | ||||||
12279 | VD->setInvalidDecl(); | ||||||
12280 | return; | ||||||
12281 | } | ||||||
12282 | |||||||
12283 | // Require a non-abstract type. | ||||||
12284 | if (RequireNonAbstractType(VD->getLocation(), Ty, | ||||||
12285 | diag::err_abstract_type_in_decl, | ||||||
12286 | AbstractVariableType)) { | ||||||
12287 | VD->setInvalidDecl(); | ||||||
12288 | return; | ||||||
12289 | } | ||||||
12290 | |||||||
12291 | // Don't bother complaining about constructors or destructors, | ||||||
12292 | // though. | ||||||
12293 | } | ||||||
12294 | |||||||
12295 | void Sema::ActOnUninitializedDecl(Decl *RealDecl) { | ||||||
12296 | // If there is no declaration, there was an error parsing it. Just ignore it. | ||||||
12297 | if (!RealDecl) | ||||||
12298 | return; | ||||||
12299 | |||||||
12300 | if (VarDecl *Var = dyn_cast<VarDecl>(RealDecl)) { | ||||||
12301 | QualType Type = Var->getType(); | ||||||
12302 | |||||||
12303 | // C++1z [dcl.dcl]p1 grammar implies that an initializer is mandatory. | ||||||
12304 | if (isa<DecompositionDecl>(RealDecl)) { | ||||||
12305 | Diag(Var->getLocation(), diag::err_decomp_decl_requires_init) << Var; | ||||||
12306 | Var->setInvalidDecl(); | ||||||
12307 | return; | ||||||
12308 | } | ||||||
12309 | |||||||
12310 | if (Type->isUndeducedType() && | ||||||
12311 | DeduceVariableDeclarationType(Var, false, nullptr)) | ||||||
12312 | return; | ||||||
12313 | |||||||
12314 | // C++11 [class.static.data]p3: A static data member can be declared with | ||||||
12315 | // the constexpr specifier; if so, its declaration shall specify | ||||||
12316 | // a brace-or-equal-initializer. | ||||||
12317 | // C++11 [dcl.constexpr]p1: The constexpr specifier shall be applied only to | ||||||
12318 | // the definition of a variable [...] or the declaration of a static data | ||||||
12319 | // member. | ||||||
12320 | if (Var->isConstexpr() && !Var->isThisDeclarationADefinition() && | ||||||
12321 | !Var->isThisDeclarationADemotedDefinition()) { | ||||||
12322 | if (Var->isStaticDataMember()) { | ||||||
12323 | // C++1z removes the relevant rule; the in-class declaration is always | ||||||
12324 | // a definition there. | ||||||
12325 | if (!getLangOpts().CPlusPlus17 && | ||||||
12326 | !Context.getTargetInfo().getCXXABI().isMicrosoft()) { | ||||||
12327 | Diag(Var->getLocation(), | ||||||
12328 | diag::err_constexpr_static_mem_var_requires_init) | ||||||
12329 | << Var->getDeclName(); | ||||||
12330 | Var->setInvalidDecl(); | ||||||
12331 | return; | ||||||
12332 | } | ||||||
12333 | } else { | ||||||
12334 | Diag(Var->getLocation(), diag::err_invalid_constexpr_var_decl); | ||||||
12335 | Var->setInvalidDecl(); | ||||||
12336 | return; | ||||||
12337 | } | ||||||
12338 | } | ||||||
12339 | |||||||
12340 | // OpenCL v1.1 s6.5.3: variables declared in the constant address space must | ||||||
12341 | // be initialized. | ||||||
12342 | if (!Var->isInvalidDecl() && | ||||||
12343 | Var->getType().getAddressSpace() == LangAS::opencl_constant && | ||||||
12344 | Var->getStorageClass() != SC_Extern && !Var->getInit()) { | ||||||
12345 | Diag(Var->getLocation(), diag::err_opencl_constant_no_init); | ||||||
12346 | Var->setInvalidDecl(); | ||||||
12347 | return; | ||||||
12348 | } | ||||||
12349 | |||||||
12350 | VarDecl::DefinitionKind DefKind = Var->isThisDeclarationADefinition(); | ||||||
12351 | if (!Var->isInvalidDecl() && DefKind != VarDecl::DeclarationOnly && | ||||||
12352 | Var->getType().hasNonTrivialToPrimitiveDefaultInitializeCUnion()) | ||||||
12353 | checkNonTrivialCUnion(Var->getType(), Var->getLocation(), | ||||||
12354 | NTCUC_DefaultInitializedObject, NTCUK_Init); | ||||||
12355 | |||||||
12356 | |||||||
12357 | switch (DefKind) { | ||||||
12358 | case VarDecl::Definition: | ||||||
12359 | if (!Var->isStaticDataMember() || !Var->getAnyInitializer()) | ||||||
12360 | break; | ||||||
12361 | |||||||
12362 | // We have an out-of-line definition of a static data member | ||||||
12363 | // that has an in-class initializer, so we type-check this like | ||||||
12364 | // a declaration. | ||||||
12365 | // | ||||||
12366 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||||
12367 | |||||||
12368 | case VarDecl::DeclarationOnly: | ||||||
12369 | // It's only a declaration. | ||||||
12370 | |||||||
12371 | // Block scope. C99 6.7p7: If an identifier for an object is | ||||||
12372 | // declared with no linkage (C99 6.2.2p6), the type for the | ||||||
12373 | // object shall be complete. | ||||||
12374 | if (!Type->isDependentType() && Var->isLocalVarDecl() && | ||||||
12375 | !Var->hasLinkage() && !Var->isInvalidDecl() && | ||||||
12376 | RequireCompleteType(Var->getLocation(), Type, | ||||||
12377 | diag::err_typecheck_decl_incomplete_type)) | ||||||
12378 | Var->setInvalidDecl(); | ||||||
12379 | |||||||
12380 | // Make sure that the type is not abstract. | ||||||
12381 | if (!Type->isDependentType() && !Var->isInvalidDecl() && | ||||||
12382 | RequireNonAbstractType(Var->getLocation(), Type, | ||||||
12383 | diag::err_abstract_type_in_decl, | ||||||
12384 | AbstractVariableType)) | ||||||
12385 | Var->setInvalidDecl(); | ||||||
12386 | if (!Type->isDependentType() && !Var->isInvalidDecl() && | ||||||
12387 | Var->getStorageClass() == SC_PrivateExtern) { | ||||||
12388 | Diag(Var->getLocation(), diag::warn_private_extern); | ||||||
12389 | Diag(Var->getLocation(), diag::note_private_extern); | ||||||
12390 | } | ||||||
12391 | |||||||
12392 | if (Context.getTargetInfo().allowDebugInfoForExternalVar() && | ||||||
12393 | !Var->isInvalidDecl() && !getLangOpts().CPlusPlus) | ||||||
12394 | ExternalDeclarations.push_back(Var); | ||||||
12395 | |||||||
12396 | return; | ||||||
12397 | |||||||
12398 | case VarDecl::TentativeDefinition: | ||||||
12399 | // File scope. C99 6.9.2p2: A declaration of an identifier for an | ||||||
12400 | // object that has file scope without an initializer, and without a | ||||||
12401 | // storage-class specifier or with the storage-class specifier "static", | ||||||
12402 | // constitutes a tentative definition. Note: A tentative definition with | ||||||
12403 | // external linkage is valid (C99 6.2.2p5). | ||||||
12404 | if (!Var->isInvalidDecl()) { | ||||||
12405 | if (const IncompleteArrayType *ArrayT | ||||||
12406 | = Context.getAsIncompleteArrayType(Type)) { | ||||||
12407 | if (RequireCompleteType(Var->getLocation(), | ||||||
12408 | ArrayT->getElementType(), | ||||||
12409 | diag::err_illegal_decl_array_incomplete_type)) | ||||||
12410 | Var->setInvalidDecl(); | ||||||
12411 | } else if (Var->getStorageClass() == SC_Static) { | ||||||
12412 | // C99 6.9.2p3: If the declaration of an identifier for an object is | ||||||
12413 | // a tentative definition and has internal linkage (C99 6.2.2p3), the | ||||||
12414 | // declared type shall not be an incomplete type. | ||||||
12415 | // NOTE: code such as the following | ||||||
12416 | // static struct s; | ||||||
12417 | // struct s { int a; }; | ||||||
12418 | // is accepted by gcc. Hence here we issue a warning instead of | ||||||
12419 | // an error and we do not invalidate the static declaration. | ||||||
12420 | // NOTE: to avoid multiple warnings, only check the first declaration. | ||||||
12421 | if (Var->isFirstDecl()) | ||||||
12422 | RequireCompleteType(Var->getLocation(), Type, | ||||||
12423 | diag::ext_typecheck_decl_incomplete_type); | ||||||
12424 | } | ||||||
12425 | } | ||||||
12426 | |||||||
12427 | // Record the tentative definition; we're done. | ||||||
12428 | if (!Var->isInvalidDecl()) | ||||||
12429 | TentativeDefinitions.push_back(Var); | ||||||
12430 | return; | ||||||
12431 | } | ||||||
12432 | |||||||
12433 | // Provide a specific diagnostic for uninitialized variable | ||||||
12434 | // definitions with incomplete array type. | ||||||
12435 | if (Type->isIncompleteArrayType()) { | ||||||
12436 | Diag(Var->getLocation(), | ||||||
12437 | diag::err_typecheck_incomplete_array_needs_initializer); | ||||||
12438 | Var->setInvalidDecl(); | ||||||
12439 | return; | ||||||
12440 | } | ||||||
12441 | |||||||
12442 | // Provide a specific diagnostic for uninitialized variable | ||||||
12443 | // definitions with reference type. | ||||||
12444 | if (Type->isReferenceType()) { | ||||||
12445 | Diag(Var->getLocation(), diag::err_reference_var_requires_init) | ||||||
12446 | << Var->getDeclName() | ||||||
12447 | << SourceRange(Var->getLocation(), Var->getLocation()); | ||||||
12448 | Var->setInvalidDecl(); | ||||||
12449 | return; | ||||||
12450 | } | ||||||
12451 | |||||||
12452 | // Do not attempt to type-check the default initializer for a | ||||||
12453 | // variable with dependent type. | ||||||
12454 | if (Type->isDependentType()) | ||||||
12455 | return; | ||||||
12456 | |||||||
12457 | if (Var->isInvalidDecl()) | ||||||
12458 | return; | ||||||
12459 | |||||||
12460 | if (!Var->hasAttr<AliasAttr>()) { | ||||||
12461 | if (RequireCompleteType(Var->getLocation(), | ||||||
12462 | Context.getBaseElementType(Type), | ||||||
12463 | diag::err_typecheck_decl_incomplete_type)) { | ||||||
12464 | Var->setInvalidDecl(); | ||||||
12465 | return; | ||||||
12466 | } | ||||||
12467 | } else { | ||||||
12468 | return; | ||||||
12469 | } | ||||||
12470 | |||||||
12471 | // The variable can not have an abstract class type. | ||||||
12472 | if (RequireNonAbstractType(Var->getLocation(), Type, | ||||||
12473 | diag::err_abstract_type_in_decl, | ||||||
12474 | AbstractVariableType)) { | ||||||
12475 | Var->setInvalidDecl(); | ||||||
12476 | return; | ||||||
12477 | } | ||||||
12478 | |||||||
12479 | // Check for jumps past the implicit initializer. C++0x | ||||||
12480 | // clarifies that this applies to a "variable with automatic | ||||||
12481 | // storage duration", not a "local variable". | ||||||
12482 | // C++11 [stmt.dcl]p3 | ||||||
12483 | // A program that jumps from a point where a variable with automatic | ||||||
12484 | // storage duration is not in scope to a point where it is in scope is | ||||||
12485 | // ill-formed unless the variable has scalar type, class type with a | ||||||
12486 | // trivial default constructor and a trivial destructor, a cv-qualified | ||||||
12487 | // version of one of these types, or an array of one of the preceding | ||||||
12488 | // types and is declared without an initializer. | ||||||
12489 | if (getLangOpts().CPlusPlus && Var->hasLocalStorage()) { | ||||||
12490 | if (const RecordType *Record | ||||||
12491 | = Context.getBaseElementType(Type)->getAs<RecordType>()) { | ||||||
12492 | CXXRecordDecl *CXXRecord = cast<CXXRecordDecl>(Record->getDecl()); | ||||||
12493 | // Mark the function (if we're in one) for further checking even if the | ||||||
12494 | // looser rules of C++11 do not require such checks, so that we can | ||||||
12495 | // diagnose incompatibilities with C++98. | ||||||
12496 | if (!CXXRecord->isPOD()) | ||||||
12497 | setFunctionHasBranchProtectedScope(); | ||||||
12498 | } | ||||||
12499 | } | ||||||
12500 | // In OpenCL, we can't initialize objects in the __local address space, | ||||||
12501 | // even implicitly, so don't synthesize an implicit initializer. | ||||||
12502 | if (getLangOpts().OpenCL && | ||||||
12503 | Var->getType().getAddressSpace() == LangAS::opencl_local) | ||||||
12504 | return; | ||||||
12505 | // C++03 [dcl.init]p9: | ||||||
12506 | // If no initializer is specified for an object, and the | ||||||
12507 | // object is of (possibly cv-qualified) non-POD class type (or | ||||||
12508 | // array thereof), the object shall be default-initialized; if | ||||||
12509 | // the object is of const-qualified type, the underlying class | ||||||
12510 | // type shall have a user-declared default | ||||||
12511 | // constructor. Otherwise, if no initializer is specified for | ||||||
12512 | // a non- static object, the object and its subobjects, if | ||||||
12513 | // any, have an indeterminate initial value); if the object | ||||||
12514 | // or any of its subobjects are of const-qualified type, the | ||||||
12515 | // program is ill-formed. | ||||||
12516 | // C++0x [dcl.init]p11: | ||||||
12517 | // If no initializer is specified for an object, the object is | ||||||
12518 | // default-initialized; [...]. | ||||||
12519 | InitializedEntity Entity = InitializedEntity::InitializeVariable(Var); | ||||||
12520 | InitializationKind Kind | ||||||
12521 | = InitializationKind::CreateDefault(Var->getLocation()); | ||||||
12522 | |||||||
12523 | InitializationSequence InitSeq(*this, Entity, Kind, None); | ||||||
12524 | ExprResult Init = InitSeq.Perform(*this, Entity, Kind, None); | ||||||
12525 | if (Init.isInvalid()) | ||||||
12526 | Var->setInvalidDecl(); | ||||||
12527 | else if (Init.get()) { | ||||||
12528 | Var->setInit(MaybeCreateExprWithCleanups(Init.get())); | ||||||
12529 | // This is important for template substitution. | ||||||
12530 | Var->setInitStyle(VarDecl::CallInit); | ||||||
12531 | } | ||||||
12532 | |||||||
12533 | CheckCompleteVariableDeclaration(Var); | ||||||
12534 | } | ||||||
12535 | } | ||||||
12536 | |||||||
12537 | void Sema::ActOnCXXForRangeDecl(Decl *D) { | ||||||
12538 | // If there is no declaration, there was an error parsing it. Ignore it. | ||||||
12539 | if (!D) | ||||||
12540 | return; | ||||||
12541 | |||||||
12542 | VarDecl *VD = dyn_cast<VarDecl>(D); | ||||||
12543 | if (!VD) { | ||||||
12544 | Diag(D->getLocation(), diag::err_for_range_decl_must_be_var); | ||||||
12545 | D->setInvalidDecl(); | ||||||
12546 | return; | ||||||
12547 | } | ||||||
12548 | |||||||
12549 | VD->setCXXForRangeDecl(true); | ||||||
12550 | |||||||
12551 | // for-range-declaration cannot be given a storage class specifier. | ||||||
12552 | int Error = -1; | ||||||
12553 | switch (VD->getStorageClass()) { | ||||||
12554 | case SC_None: | ||||||
12555 | break; | ||||||
12556 | case SC_Extern: | ||||||
12557 | Error = 0; | ||||||
12558 | break; | ||||||
12559 | case SC_Static: | ||||||
12560 | Error = 1; | ||||||
12561 | break; | ||||||
12562 | case SC_PrivateExtern: | ||||||
12563 | Error = 2; | ||||||
12564 | break; | ||||||
12565 | case SC_Auto: | ||||||
12566 | Error = 3; | ||||||
12567 | break; | ||||||
12568 | case SC_Register: | ||||||
12569 | Error = 4; | ||||||
12570 | break; | ||||||
12571 | } | ||||||
12572 | if (Error != -1) { | ||||||
12573 | Diag(VD->getOuterLocStart(), diag::err_for_range_storage_class) | ||||||
12574 | << VD->getDeclName() << Error; | ||||||
12575 | D->setInvalidDecl(); | ||||||
12576 | } | ||||||
12577 | } | ||||||
12578 | |||||||
12579 | StmtResult | ||||||
12580 | Sema::ActOnCXXForRangeIdentifier(Scope *S, SourceLocation IdentLoc, | ||||||
12581 | IdentifierInfo *Ident, | ||||||
12582 | ParsedAttributes &Attrs, | ||||||
12583 | SourceLocation AttrEnd) { | ||||||
12584 | // C++1y [stmt.iter]p1: | ||||||
12585 | // A range-based for statement of the form | ||||||
12586 | // for ( for-range-identifier : for-range-initializer ) statement | ||||||
12587 | // is equivalent to | ||||||
12588 | // for ( auto&& for-range-identifier : for-range-initializer ) statement | ||||||
12589 | DeclSpec DS(Attrs.getPool().getFactory()); | ||||||
12590 | |||||||
12591 | const char *PrevSpec; | ||||||
12592 | unsigned DiagID; | ||||||
12593 | DS.SetTypeSpecType(DeclSpec::TST_auto, IdentLoc, PrevSpec, DiagID, | ||||||
12594 | getPrintingPolicy()); | ||||||
12595 | |||||||
12596 | Declarator D(DS, DeclaratorContext::ForContext); | ||||||
12597 | D.SetIdentifier(Ident, IdentLoc); | ||||||
12598 | D.takeAttributes(Attrs, AttrEnd); | ||||||
12599 | |||||||
12600 | D.AddTypeInfo(DeclaratorChunk::getReference(0, IdentLoc, /*lvalue*/ false), | ||||||
12601 | IdentLoc); | ||||||
12602 | Decl *Var = ActOnDeclarator(S, D); | ||||||
12603 | cast<VarDecl>(Var)->setCXXForRangeDecl(true); | ||||||
12604 | FinalizeDeclaration(Var); | ||||||
12605 | return ActOnDeclStmt(FinalizeDeclaratorGroup(S, DS, Var), IdentLoc, | ||||||
12606 | AttrEnd.isValid() ? AttrEnd : IdentLoc); | ||||||
12607 | } | ||||||
12608 | |||||||
12609 | void Sema::CheckCompleteVariableDeclaration(VarDecl *var) { | ||||||
12610 | if (var->isInvalidDecl()) return; | ||||||
12611 | |||||||
12612 | if (getLangOpts().OpenCL) { | ||||||
12613 | // OpenCL v2.0 s6.12.5 - Every block variable declaration must have an | ||||||
12614 | // initialiser | ||||||
12615 | if (var->getTypeSourceInfo()->getType()->isBlockPointerType() && | ||||||
12616 | !var->hasInit()) { | ||||||
12617 | Diag(var->getLocation(), diag::err_opencl_invalid_block_declaration) | ||||||
12618 | << 1 /*Init*/; | ||||||
12619 | var->setInvalidDecl(); | ||||||
12620 | return; | ||||||
12621 | } | ||||||
12622 | } | ||||||
12623 | |||||||
12624 | // In Objective-C, don't allow jumps past the implicit initialization of a | ||||||
12625 | // local retaining variable. | ||||||
12626 | if (getLangOpts().ObjC && | ||||||
12627 | var->hasLocalStorage()) { | ||||||
12628 | switch (var->getType().getObjCLifetime()) { | ||||||
12629 | case Qualifiers::OCL_None: | ||||||
12630 | case Qualifiers::OCL_ExplicitNone: | ||||||
12631 | case Qualifiers::OCL_Autoreleasing: | ||||||
12632 | break; | ||||||
12633 | |||||||
12634 | case Qualifiers::OCL_Weak: | ||||||
12635 | case Qualifiers::OCL_Strong: | ||||||
12636 | setFunctionHasBranchProtectedScope(); | ||||||
12637 | break; | ||||||
12638 | } | ||||||
12639 | } | ||||||
12640 | |||||||
12641 | if (var->hasLocalStorage() && | ||||||
12642 | var->getType().isDestructedType() == QualType::DK_nontrivial_c_struct) | ||||||
12643 | setFunctionHasBranchProtectedScope(); | ||||||
12644 | |||||||
12645 | // Warn about externally-visible variables being defined without a | ||||||
12646 | // prior declaration. We only want to do this for global | ||||||
12647 | // declarations, but we also specifically need to avoid doing it for | ||||||
12648 | // class members because the linkage of an anonymous class can | ||||||
12649 | // change if it's later given a typedef name. | ||||||
12650 | if (var->isThisDeclarationADefinition() && | ||||||
12651 | var->getDeclContext()->getRedeclContext()->isFileContext() && | ||||||
12652 | var->isExternallyVisible() && var->hasLinkage() && | ||||||
12653 | !var->isInline() && !var->getDescribedVarTemplate() && | ||||||
12654 | !isa<VarTemplatePartialSpecializationDecl>(var) && | ||||||
12655 | !isTemplateInstantiation(var->getTemplateSpecializationKind()) && | ||||||
12656 | !getDiagnostics().isIgnored(diag::warn_missing_variable_declarations, | ||||||
12657 | var->getLocation())) { | ||||||
12658 | // Find a previous declaration that's not a definition. | ||||||
12659 | VarDecl *prev = var->getPreviousDecl(); | ||||||
12660 | while (prev && prev->isThisDeclarationADefinition()) | ||||||
12661 | prev = prev->getPreviousDecl(); | ||||||
12662 | |||||||
12663 | if (!prev) { | ||||||
12664 | Diag(var->getLocation(), diag::warn_missing_variable_declarations) << var; | ||||||
12665 | Diag(var->getTypeSpecStartLoc(), diag::note_static_for_internal_linkage) | ||||||
12666 | << /* variable */ 0; | ||||||
12667 | } | ||||||
12668 | } | ||||||
12669 | |||||||
12670 | // Cache the result of checking for constant initialization. | ||||||
12671 | Optional<bool> CacheHasConstInit; | ||||||
12672 | const Expr *CacheCulprit = nullptr; | ||||||
12673 | auto checkConstInit = [&]() mutable { | ||||||
12674 | if (!CacheHasConstInit) | ||||||
12675 | CacheHasConstInit = var->getInit()->isConstantInitializer( | ||||||
12676 | Context, var->getType()->isReferenceType(), &CacheCulprit); | ||||||
12677 | return *CacheHasConstInit; | ||||||
12678 | }; | ||||||
12679 | |||||||
12680 | if (var->getTLSKind() == VarDecl::TLS_Static) { | ||||||
12681 | if (var->getType().isDestructedType()) { | ||||||
12682 | // GNU C++98 edits for __thread, [basic.start.term]p3: | ||||||
12683 | // The type of an object with thread storage duration shall not | ||||||
12684 | // have a non-trivial destructor. | ||||||
12685 | Diag(var->getLocation(), diag::err_thread_nontrivial_dtor); | ||||||
12686 | if (getLangOpts().CPlusPlus11) | ||||||
12687 | Diag(var->getLocation(), diag::note_use_thread_local); | ||||||
12688 | } else if (getLangOpts().CPlusPlus && var->hasInit()) { | ||||||
12689 | if (!checkConstInit()) { | ||||||
12690 | // GNU C++98 edits for __thread, [basic.start.init]p4: | ||||||
12691 | // An object of thread storage duration shall not require dynamic | ||||||
12692 | // initialization. | ||||||
12693 | // FIXME: Need strict checking here. | ||||||
12694 | Diag(CacheCulprit->getExprLoc(), diag::err_thread_dynamic_init) | ||||||
12695 | << CacheCulprit->getSourceRange(); | ||||||
12696 | if (getLangOpts().CPlusPlus11) | ||||||
12697 | Diag(var->getLocation(), diag::note_use_thread_local); | ||||||
12698 | } | ||||||
12699 | } | ||||||
12700 | } | ||||||
12701 | |||||||
12702 | // Apply section attributes and pragmas to global variables. | ||||||
12703 | bool GlobalStorage = var->hasGlobalStorage(); | ||||||
12704 | if (GlobalStorage && var->isThisDeclarationADefinition() && | ||||||
12705 | !inTemplateInstantiation()) { | ||||||
12706 | PragmaStack<StringLiteral *> *Stack = nullptr; | ||||||
12707 | int SectionFlags = ASTContext::PSF_Implicit | ASTContext::PSF_Read; | ||||||
12708 | if (var->getType().isConstQualified()) | ||||||
12709 | Stack = &ConstSegStack; | ||||||
12710 | else if (!var->getInit()) { | ||||||
12711 | Stack = &BSSSegStack; | ||||||
12712 | SectionFlags |= ASTContext::PSF_Write; | ||||||
12713 | } else { | ||||||
12714 | Stack = &DataSegStack; | ||||||
12715 | SectionFlags |= ASTContext::PSF_Write; | ||||||
12716 | } | ||||||
12717 | if (Stack->CurrentValue && !var->hasAttr<SectionAttr>()) | ||||||
12718 | var->addAttr(SectionAttr::CreateImplicit( | ||||||
12719 | Context, Stack->CurrentValue->getString(), | ||||||
12720 | Stack->CurrentPragmaLocation, AttributeCommonInfo::AS_Pragma, | ||||||
12721 | SectionAttr::Declspec_allocate)); | ||||||
12722 | if (const SectionAttr *SA = var->getAttr<SectionAttr>()) | ||||||
12723 | if (UnifySection(SA->getName(), SectionFlags, var)) | ||||||
12724 | var->dropAttr<SectionAttr>(); | ||||||
12725 | |||||||
12726 | // Apply the init_seg attribute if this has an initializer. If the | ||||||
12727 | // initializer turns out to not be dynamic, we'll end up ignoring this | ||||||
12728 | // attribute. | ||||||
12729 | if (CurInitSeg && var->getInit()) | ||||||
12730 | var->addAttr(InitSegAttr::CreateImplicit(Context, CurInitSeg->getString(), | ||||||
12731 | CurInitSegLoc, | ||||||
12732 | AttributeCommonInfo::AS_Pragma)); | ||||||
12733 | } | ||||||
12734 | |||||||
12735 | // All the following checks are C++ only. | ||||||
12736 | if (!getLangOpts().CPlusPlus) { | ||||||
12737 | // If this variable must be emitted, add it as an initializer for the | ||||||
12738 | // current module. | ||||||
12739 | if (Context.DeclMustBeEmitted(var) && !ModuleScopes.empty()) | ||||||
12740 | Context.addModuleInitializer(ModuleScopes.back().Module, var); | ||||||
12741 | return; | ||||||
12742 | } | ||||||
12743 | |||||||
12744 | if (auto *DD = dyn_cast<DecompositionDecl>(var)) | ||||||
12745 | CheckCompleteDecompositionDeclaration(DD); | ||||||
12746 | |||||||
12747 | QualType type = var->getType(); | ||||||
12748 | if (type->isDependentType()) return; | ||||||
12749 | |||||||
12750 | if (var->hasAttr<BlocksAttr>()) | ||||||
12751 | getCurFunction()->addByrefBlockVar(var); | ||||||
12752 | |||||||
12753 | Expr *Init = var->getInit(); | ||||||
12754 | bool IsGlobal = GlobalStorage && !var->isStaticLocal(); | ||||||
12755 | QualType baseType = Context.getBaseElementType(type); | ||||||
12756 | |||||||
12757 | if (Init && !Init->isValueDependent()) { | ||||||
12758 | if (var->isConstexpr()) { | ||||||
12759 | SmallVector<PartialDiagnosticAt, 8> Notes; | ||||||
12760 | if (!var->evaluateValue(Notes) || !var->isInitICE()) { | ||||||
12761 | SourceLocation DiagLoc = var->getLocation(); | ||||||
12762 | // If the note doesn't add any useful information other than a source | ||||||
12763 | // location, fold it into the primary diagnostic. | ||||||
12764 | if (Notes.size() == 1 && Notes[0].second.getDiagID() == | ||||||
12765 | diag::note_invalid_subexpr_in_const_expr) { | ||||||
12766 | DiagLoc = Notes[0].first; | ||||||
12767 | Notes.clear(); | ||||||
12768 | } | ||||||
12769 | Diag(DiagLoc, diag::err_constexpr_var_requires_const_init) | ||||||
12770 | << var << Init->getSourceRange(); | ||||||
12771 | for (unsigned I = 0, N = Notes.size(); I != N; ++I) | ||||||
12772 | Diag(Notes[I].first, Notes[I].second); | ||||||
12773 | } | ||||||
12774 | } else if (var->mightBeUsableInConstantExpressions(Context)) { | ||||||
12775 | // Check whether the initializer of a const variable of integral or | ||||||
12776 | // enumeration type is an ICE now, since we can't tell whether it was | ||||||
12777 | // initialized by a constant expression if we check later. | ||||||
12778 | var->checkInitIsICE(); | ||||||
12779 | } | ||||||
12780 | |||||||
12781 | // Don't emit further diagnostics about constexpr globals since they | ||||||
12782 | // were just diagnosed. | ||||||
12783 | if (!var->isConstexpr() && GlobalStorage && var->hasAttr<ConstInitAttr>()) { | ||||||
12784 | // FIXME: Need strict checking in C++03 here. | ||||||
12785 | bool DiagErr = getLangOpts().CPlusPlus11 | ||||||
12786 | ? !var->checkInitIsICE() : !checkConstInit(); | ||||||
12787 | if (DiagErr) { | ||||||
12788 | auto *Attr = var->getAttr<ConstInitAttr>(); | ||||||
12789 | Diag(var->getLocation(), diag::err_require_constant_init_failed) | ||||||
12790 | << Init->getSourceRange(); | ||||||
12791 | Diag(Attr->getLocation(), | ||||||
12792 | diag::note_declared_required_constant_init_here) | ||||||
12793 | << Attr->getRange() << Attr->isConstinit(); | ||||||
12794 | if (getLangOpts().CPlusPlus11) { | ||||||
12795 | APValue Value; | ||||||
12796 | SmallVector<PartialDiagnosticAt, 8> Notes; | ||||||
12797 | Init->EvaluateAsInitializer(Value, getASTContext(), var, Notes); | ||||||
12798 | for (auto &it : Notes) | ||||||
12799 | Diag(it.first, it.second); | ||||||
12800 | } else { | ||||||
12801 | Diag(CacheCulprit->getExprLoc(), | ||||||
12802 | diag::note_invalid_subexpr_in_const_expr) | ||||||
12803 | << CacheCulprit->getSourceRange(); | ||||||
12804 | } | ||||||
12805 | } | ||||||
12806 | } | ||||||
12807 | else if (!var->isConstexpr() && IsGlobal && | ||||||
12808 | !getDiagnostics().isIgnored(diag::warn_global_constructor, | ||||||
12809 | var->getLocation())) { | ||||||
12810 | // Warn about globals which don't have a constant initializer. Don't | ||||||
12811 | // warn about globals with a non-trivial destructor because we already | ||||||
12812 | // warned about them. | ||||||
12813 | CXXRecordDecl *RD = baseType->getAsCXXRecordDecl(); | ||||||
12814 | if (!(RD && !RD->hasTrivialDestructor())) { | ||||||
12815 | if (!checkConstInit()) | ||||||
12816 | Diag(var->getLocation(), diag::warn_global_constructor) | ||||||
12817 | << Init->getSourceRange(); | ||||||
12818 | } | ||||||
12819 | } | ||||||
12820 | } | ||||||
12821 | |||||||
12822 | // Require the destructor. | ||||||
12823 | if (const RecordType *recordType = baseType->getAs<RecordType>()) | ||||||
12824 | FinalizeVarWithDestructor(var, recordType); | ||||||
12825 | |||||||
12826 | // If this variable must be emitted, add it as an initializer for the current | ||||||
12827 | // module. | ||||||
12828 | if (Context.DeclMustBeEmitted(var) && !ModuleScopes.empty()) | ||||||
12829 | Context.addModuleInitializer(ModuleScopes.back().Module, var); | ||||||
12830 | } | ||||||
12831 | |||||||
12832 | /// Determines if a variable's alignment is dependent. | ||||||
12833 | static bool hasDependentAlignment(VarDecl *VD) { | ||||||
12834 | if (VD->getType()->isDependentType()) | ||||||
12835 | return true; | ||||||
12836 | for (auto *I : VD->specific_attrs<AlignedAttr>()) | ||||||
12837 | if (I->isAlignmentDependent()) | ||||||
12838 | return true; | ||||||
12839 | return false; | ||||||
12840 | } | ||||||
12841 | |||||||
12842 | /// Check if VD needs to be dllexport/dllimport due to being in a | ||||||
12843 | /// dllexport/import function. | ||||||
12844 | void Sema::CheckStaticLocalForDllExport(VarDecl *VD) { | ||||||
12845 | assert(VD->isStaticLocal())((VD->isStaticLocal()) ? static_cast<void> (0) : __assert_fail ("VD->isStaticLocal()", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 12845, __PRETTY_FUNCTION__)); | ||||||
12846 | |||||||
12847 | auto *FD = dyn_cast_or_null<FunctionDecl>(VD->getParentFunctionOrMethod()); | ||||||
12848 | |||||||
12849 | // Find outermost function when VD is in lambda function. | ||||||
12850 | while (FD && !getDLLAttr(FD) && | ||||||
12851 | !FD->hasAttr<DLLExportStaticLocalAttr>() && | ||||||
12852 | !FD->hasAttr<DLLImportStaticLocalAttr>()) { | ||||||
12853 | FD = dyn_cast_or_null<FunctionDecl>(FD->getParentFunctionOrMethod()); | ||||||
12854 | } | ||||||
12855 | |||||||
12856 | if (!FD) | ||||||
12857 | return; | ||||||
12858 | |||||||
12859 | // Static locals inherit dll attributes from their function. | ||||||
12860 | if (Attr *A = getDLLAttr(FD)) { | ||||||
12861 | auto *NewAttr = cast<InheritableAttr>(A->clone(getASTContext())); | ||||||
12862 | NewAttr->setInherited(true); | ||||||
12863 | VD->addAttr(NewAttr); | ||||||
12864 | } else if (Attr *A = FD->getAttr<DLLExportStaticLocalAttr>()) { | ||||||
12865 | auto *NewAttr = DLLExportAttr::CreateImplicit(getASTContext(), *A); | ||||||
12866 | NewAttr->setInherited(true); | ||||||
12867 | VD->addAttr(NewAttr); | ||||||
12868 | |||||||
12869 | // Export this function to enforce exporting this static variable even | ||||||
12870 | // if it is not used in this compilation unit. | ||||||
12871 | if (!FD->hasAttr<DLLExportAttr>()) | ||||||
12872 | FD->addAttr(NewAttr); | ||||||
12873 | |||||||
12874 | } else if (Attr *A = FD->getAttr<DLLImportStaticLocalAttr>()) { | ||||||
12875 | auto *NewAttr = DLLImportAttr::CreateImplicit(getASTContext(), *A); | ||||||
12876 | NewAttr->setInherited(true); | ||||||
12877 | VD->addAttr(NewAttr); | ||||||
12878 | } | ||||||
12879 | } | ||||||
12880 | |||||||
12881 | /// FinalizeDeclaration - called by ParseDeclarationAfterDeclarator to perform | ||||||
12882 | /// any semantic actions necessary after any initializer has been attached. | ||||||
12883 | void Sema::FinalizeDeclaration(Decl *ThisDecl) { | ||||||
12884 | // Note that we are no longer parsing the initializer for this declaration. | ||||||
12885 | ParsingInitForAutoVars.erase(ThisDecl); | ||||||
12886 | |||||||
12887 | VarDecl *VD = dyn_cast_or_null<VarDecl>(ThisDecl); | ||||||
12888 | if (!VD) | ||||||
12889 | return; | ||||||
12890 | |||||||
12891 | // Apply an implicit SectionAttr if '#pragma clang section bss|data|rodata' is active | ||||||
12892 | if (VD->hasGlobalStorage() && VD->isThisDeclarationADefinition() && | ||||||
12893 | !inTemplateInstantiation() && !VD->hasAttr<SectionAttr>()) { | ||||||
12894 | if (PragmaClangBSSSection.Valid) | ||||||
12895 | VD->addAttr(PragmaClangBSSSectionAttr::CreateImplicit( | ||||||
12896 | Context, PragmaClangBSSSection.SectionName, | ||||||
12897 | PragmaClangBSSSection.PragmaLocation, | ||||||
12898 | AttributeCommonInfo::AS_Pragma)); | ||||||
12899 | if (PragmaClangDataSection.Valid) | ||||||
12900 | VD->addAttr(PragmaClangDataSectionAttr::CreateImplicit( | ||||||
12901 | Context, PragmaClangDataSection.SectionName, | ||||||
12902 | PragmaClangDataSection.PragmaLocation, | ||||||
12903 | AttributeCommonInfo::AS_Pragma)); | ||||||
12904 | if (PragmaClangRodataSection.Valid) | ||||||
12905 | VD->addAttr(PragmaClangRodataSectionAttr::CreateImplicit( | ||||||
12906 | Context, PragmaClangRodataSection.SectionName, | ||||||
12907 | PragmaClangRodataSection.PragmaLocation, | ||||||
12908 | AttributeCommonInfo::AS_Pragma)); | ||||||
12909 | if (PragmaClangRelroSection.Valid) | ||||||
12910 | VD->addAttr(PragmaClangRelroSectionAttr::CreateImplicit( | ||||||
12911 | Context, PragmaClangRelroSection.SectionName, | ||||||
12912 | PragmaClangRelroSection.PragmaLocation, | ||||||
12913 | AttributeCommonInfo::AS_Pragma)); | ||||||
12914 | } | ||||||
12915 | |||||||
12916 | if (auto *DD = dyn_cast<DecompositionDecl>(ThisDecl)) { | ||||||
12917 | for (auto *BD : DD->bindings()) { | ||||||
12918 | FinalizeDeclaration(BD); | ||||||
12919 | } | ||||||
12920 | } | ||||||
12921 | |||||||
12922 | checkAttributesAfterMerging(*this, *VD); | ||||||
12923 | |||||||
12924 | // Perform TLS alignment check here after attributes attached to the variable | ||||||
12925 | // which may affect the alignment have been processed. Only perform the check | ||||||
12926 | // if the target has a maximum TLS alignment (zero means no constraints). | ||||||
12927 | if (unsigned MaxAlign = Context.getTargetInfo().getMaxTLSAlign()) { | ||||||
12928 | // Protect the check so that it's not performed on dependent types and | ||||||
12929 | // dependent alignments (we can't determine the alignment in that case). | ||||||
12930 | if (VD->getTLSKind() && !hasDependentAlignment(VD) && | ||||||
12931 | !VD->isInvalidDecl()) { | ||||||
12932 | CharUnits MaxAlignChars = Context.toCharUnitsFromBits(MaxAlign); | ||||||
12933 | if (Context.getDeclAlign(VD) > MaxAlignChars) { | ||||||
12934 | Diag(VD->getLocation(), diag::err_tls_var_aligned_over_maximum) | ||||||
12935 | << (unsigned)Context.getDeclAlign(VD).getQuantity() << VD | ||||||
12936 | << (unsigned)MaxAlignChars.getQuantity(); | ||||||
12937 | } | ||||||
12938 | } | ||||||
12939 | } | ||||||
12940 | |||||||
12941 | if (VD->isStaticLocal()) { | ||||||
12942 | CheckStaticLocalForDllExport(VD); | ||||||
12943 | |||||||
12944 | if (dyn_cast_or_null<FunctionDecl>(VD->getParentFunctionOrMethod())) { | ||||||
12945 | // CUDA 8.0 E.3.9.4: Within the body of a __device__ or __global__ | ||||||
12946 | // function, only __shared__ variables or variables without any device | ||||||
12947 | // memory qualifiers may be declared with static storage class. | ||||||
12948 | // Note: It is unclear how a function-scope non-const static variable | ||||||
12949 | // without device memory qualifier is implemented, therefore only static | ||||||
12950 | // const variable without device memory qualifier is allowed. | ||||||
12951 | [&]() { | ||||||
12952 | if (!getLangOpts().CUDA) | ||||||
12953 | return; | ||||||
12954 | if (VD->hasAttr<CUDASharedAttr>()) | ||||||
12955 | return; | ||||||
12956 | if (VD->getType().isConstQualified() && | ||||||
12957 | !(VD->hasAttr<CUDADeviceAttr>() || VD->hasAttr<CUDAConstantAttr>())) | ||||||
12958 | return; | ||||||
12959 | if (CUDADiagIfDeviceCode(VD->getLocation(), | ||||||
12960 | diag::err_device_static_local_var) | ||||||
12961 | << CurrentCUDATarget()) | ||||||
12962 | VD->setInvalidDecl(); | ||||||
12963 | }(); | ||||||
12964 | } | ||||||
12965 | } | ||||||
12966 | |||||||
12967 | // Perform check for initializers of device-side global variables. | ||||||
12968 | // CUDA allows empty constructors as initializers (see E.2.3.1, CUDA | ||||||
12969 | // 7.5). We must also apply the same checks to all __shared__ | ||||||
12970 | // variables whether they are local or not. CUDA also allows | ||||||
12971 | // constant initializers for __constant__ and __device__ variables. | ||||||
12972 | if (getLangOpts().CUDA) | ||||||
12973 | checkAllowedCUDAInitializer(VD); | ||||||
12974 | |||||||
12975 | // Grab the dllimport or dllexport attribute off of the VarDecl. | ||||||
12976 | const InheritableAttr *DLLAttr = getDLLAttr(VD); | ||||||
12977 | |||||||
12978 | // Imported static data members cannot be defined out-of-line. | ||||||
12979 | if (const auto *IA = dyn_cast_or_null<DLLImportAttr>(DLLAttr)) { | ||||||
12980 | if (VD->isStaticDataMember() && VD->isOutOfLine() && | ||||||
12981 | VD->isThisDeclarationADefinition()) { | ||||||
12982 | // We allow definitions of dllimport class template static data members | ||||||
12983 | // with a warning. | ||||||
12984 | CXXRecordDecl *Context = | ||||||
12985 | cast<CXXRecordDecl>(VD->getFirstDecl()->getDeclContext()); | ||||||
12986 | bool IsClassTemplateMember = | ||||||
12987 | isa<ClassTemplatePartialSpecializationDecl>(Context) || | ||||||
12988 | Context->getDescribedClassTemplate(); | ||||||
12989 | |||||||
12990 | Diag(VD->getLocation(), | ||||||
12991 | IsClassTemplateMember | ||||||
12992 | ? diag::warn_attribute_dllimport_static_field_definition | ||||||
12993 | : diag::err_attribute_dllimport_static_field_definition); | ||||||
12994 | Diag(IA->getLocation(), diag::note_attribute); | ||||||
12995 | if (!IsClassTemplateMember) | ||||||
12996 | VD->setInvalidDecl(); | ||||||
12997 | } | ||||||
12998 | } | ||||||
12999 | |||||||
13000 | // dllimport/dllexport variables cannot be thread local, their TLS index | ||||||
13001 | // isn't exported with the variable. | ||||||
13002 | if (DLLAttr && VD->getTLSKind()) { | ||||||
13003 | auto *F = dyn_cast_or_null<FunctionDecl>(VD->getParentFunctionOrMethod()); | ||||||
13004 | if (F && getDLLAttr(F)) { | ||||||
13005 | assert(VD->isStaticLocal())((VD->isStaticLocal()) ? static_cast<void> (0) : __assert_fail ("VD->isStaticLocal()", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 13005, __PRETTY_FUNCTION__)); | ||||||
13006 | // But if this is a static local in a dlimport/dllexport function, the | ||||||
13007 | // function will never be inlined, which means the var would never be | ||||||
13008 | // imported, so having it marked import/export is safe. | ||||||
13009 | } else { | ||||||
13010 | Diag(VD->getLocation(), diag::err_attribute_dll_thread_local) << VD | ||||||
13011 | << DLLAttr; | ||||||
13012 | VD->setInvalidDecl(); | ||||||
13013 | } | ||||||
13014 | } | ||||||
13015 | |||||||
13016 | if (UsedAttr *Attr = VD->getAttr<UsedAttr>()) { | ||||||
13017 | if (!Attr->isInherited() && !VD->isThisDeclarationADefinition()) { | ||||||
13018 | Diag(Attr->getLocation(), diag::warn_attribute_ignored) << Attr; | ||||||
13019 | VD->dropAttr<UsedAttr>(); | ||||||
13020 | } | ||||||
13021 | } | ||||||
13022 | |||||||
13023 | const DeclContext *DC = VD->getDeclContext(); | ||||||
13024 | // If there's a #pragma GCC visibility in scope, and this isn't a class | ||||||
13025 | // member, set the visibility of this variable. | ||||||
13026 | if (DC->getRedeclContext()->isFileContext() && VD->isExternallyVisible()) | ||||||
13027 | AddPushedVisibilityAttribute(VD); | ||||||
13028 | |||||||
13029 | // FIXME: Warn on unused var template partial specializations. | ||||||
13030 | if (VD->isFileVarDecl() && !isa<VarTemplatePartialSpecializationDecl>(VD)) | ||||||
13031 | MarkUnusedFileScopedDecl(VD); | ||||||
13032 | |||||||
13033 | // Now we have parsed the initializer and can update the table of magic | ||||||
13034 | // tag values. | ||||||
13035 | if (!VD->hasAttr<TypeTagForDatatypeAttr>() || | ||||||
13036 | !VD->getType()->isIntegralOrEnumerationType()) | ||||||
13037 | return; | ||||||
13038 | |||||||
13039 | for (const auto *I : ThisDecl->specific_attrs<TypeTagForDatatypeAttr>()) { | ||||||
13040 | const Expr *MagicValueExpr = VD->getInit(); | ||||||
13041 | if (!MagicValueExpr) { | ||||||
13042 | continue; | ||||||
13043 | } | ||||||
13044 | llvm::APSInt MagicValueInt; | ||||||
13045 | if (!MagicValueExpr->isIntegerConstantExpr(MagicValueInt, Context)) { | ||||||
13046 | Diag(I->getRange().getBegin(), | ||||||
13047 | diag::err_type_tag_for_datatype_not_ice) | ||||||
13048 | << LangOpts.CPlusPlus << MagicValueExpr->getSourceRange(); | ||||||
13049 | continue; | ||||||
13050 | } | ||||||
13051 | if (MagicValueInt.getActiveBits() > 64) { | ||||||
13052 | Diag(I->getRange().getBegin(), | ||||||
13053 | diag::err_type_tag_for_datatype_too_large) | ||||||
13054 | << LangOpts.CPlusPlus << MagicValueExpr->getSourceRange(); | ||||||
13055 | continue; | ||||||
13056 | } | ||||||
13057 | uint64_t MagicValue = MagicValueInt.getZExtValue(); | ||||||
13058 | RegisterTypeTagForDatatype(I->getArgumentKind(), | ||||||
13059 | MagicValue, | ||||||
13060 | I->getMatchingCType(), | ||||||
13061 | I->getLayoutCompatible(), | ||||||
13062 | I->getMustBeNull()); | ||||||
13063 | } | ||||||
13064 | } | ||||||
13065 | |||||||
13066 | static bool hasDeducedAuto(DeclaratorDecl *DD) { | ||||||
13067 | auto *VD = dyn_cast<VarDecl>(DD); | ||||||
13068 | return VD && !VD->getType()->hasAutoForTrailingReturnType(); | ||||||
13069 | } | ||||||
13070 | |||||||
13071 | Sema::DeclGroupPtrTy Sema::FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, | ||||||
13072 | ArrayRef<Decl *> Group) { | ||||||
13073 | SmallVector<Decl*, 8> Decls; | ||||||
13074 | |||||||
13075 | if (DS.isTypeSpecOwned()) | ||||||
13076 | Decls.push_back(DS.getRepAsDecl()); | ||||||
13077 | |||||||
13078 | DeclaratorDecl *FirstDeclaratorInGroup = nullptr; | ||||||
13079 | DecompositionDecl *FirstDecompDeclaratorInGroup = nullptr; | ||||||
13080 | bool DiagnosedMultipleDecomps = false; | ||||||
13081 | DeclaratorDecl *FirstNonDeducedAutoInGroup = nullptr; | ||||||
13082 | bool DiagnosedNonDeducedAuto = false; | ||||||
13083 | |||||||
13084 | for (unsigned i = 0, e = Group.size(); i != e; ++i) { | ||||||
13085 | if (Decl *D = Group[i]) { | ||||||
13086 | // For declarators, there are some additional syntactic-ish checks we need | ||||||
13087 | // to perform. | ||||||
13088 | if (auto *DD = dyn_cast<DeclaratorDecl>(D)) { | ||||||
13089 | if (!FirstDeclaratorInGroup) | ||||||
13090 | FirstDeclaratorInGroup = DD; | ||||||
13091 | if (!FirstDecompDeclaratorInGroup) | ||||||
13092 | FirstDecompDeclaratorInGroup = dyn_cast<DecompositionDecl>(D); | ||||||
13093 | if (!FirstNonDeducedAutoInGroup && DS.hasAutoTypeSpec() && | ||||||
13094 | !hasDeducedAuto(DD)) | ||||||
13095 | FirstNonDeducedAutoInGroup = DD; | ||||||
13096 | |||||||
13097 | if (FirstDeclaratorInGroup != DD) { | ||||||
13098 | // A decomposition declaration cannot be combined with any other | ||||||
13099 | // declaration in the same group. | ||||||
13100 | if (FirstDecompDeclaratorInGroup && !DiagnosedMultipleDecomps) { | ||||||
13101 | Diag(FirstDecompDeclaratorInGroup->getLocation(), | ||||||
13102 | diag::err_decomp_decl_not_alone) | ||||||
13103 | << FirstDeclaratorInGroup->getSourceRange() | ||||||
13104 | << DD->getSourceRange(); | ||||||
13105 | DiagnosedMultipleDecomps = true; | ||||||
13106 | } | ||||||
13107 | |||||||
13108 | // A declarator that uses 'auto' in any way other than to declare a | ||||||
13109 | // variable with a deduced type cannot be combined with any other | ||||||
13110 | // declarator in the same group. | ||||||
13111 | if (FirstNonDeducedAutoInGroup && !DiagnosedNonDeducedAuto) { | ||||||
13112 | Diag(FirstNonDeducedAutoInGroup->getLocation(), | ||||||
13113 | diag::err_auto_non_deduced_not_alone) | ||||||
13114 | << FirstNonDeducedAutoInGroup->getType() | ||||||
13115 | ->hasAutoForTrailingReturnType() | ||||||
13116 | << FirstDeclaratorInGroup->getSourceRange() | ||||||
13117 | << DD->getSourceRange(); | ||||||
13118 | DiagnosedNonDeducedAuto = true; | ||||||
13119 | } | ||||||
13120 | } | ||||||
13121 | } | ||||||
13122 | |||||||
13123 | Decls.push_back(D); | ||||||
13124 | } | ||||||
13125 | } | ||||||
13126 | |||||||
13127 | if (DeclSpec::isDeclRep(DS.getTypeSpecType())) { | ||||||
13128 | if (TagDecl *Tag = dyn_cast_or_null<TagDecl>(DS.getRepAsDecl())) { | ||||||
13129 | handleTagNumbering(Tag, S); | ||||||
13130 | if (FirstDeclaratorInGroup && !Tag->hasNameForLinkage() && | ||||||
13131 | getLangOpts().CPlusPlus) | ||||||
13132 | Context.addDeclaratorForUnnamedTagDecl(Tag, FirstDeclaratorInGroup); | ||||||
13133 | } | ||||||
13134 | } | ||||||
13135 | |||||||
13136 | return BuildDeclaratorGroup(Decls); | ||||||
13137 | } | ||||||
13138 | |||||||
13139 | /// BuildDeclaratorGroup - convert a list of declarations into a declaration | ||||||
13140 | /// group, performing any necessary semantic checking. | ||||||
13141 | Sema::DeclGroupPtrTy | ||||||
13142 | Sema::BuildDeclaratorGroup(MutableArrayRef<Decl *> Group) { | ||||||
13143 | // C++14 [dcl.spec.auto]p7: (DR1347) | ||||||
13144 | // If the type that replaces the placeholder type is not the same in each | ||||||
13145 | // deduction, the program is ill-formed. | ||||||
13146 | if (Group.size() > 1) { | ||||||
13147 | QualType Deduced; | ||||||
13148 | VarDecl *DeducedDecl = nullptr; | ||||||
13149 | for (unsigned i = 0, e = Group.size(); i != e; ++i) { | ||||||
13150 | VarDecl *D = dyn_cast<VarDecl>(Group[i]); | ||||||
13151 | if (!D || D->isInvalidDecl()) | ||||||
13152 | break; | ||||||
13153 | DeducedType *DT = D->getType()->getContainedDeducedType(); | ||||||
13154 | if (!DT || DT->getDeducedType().isNull()) | ||||||
13155 | continue; | ||||||
13156 | if (Deduced.isNull()) { | ||||||
13157 | Deduced = DT->getDeducedType(); | ||||||
13158 | DeducedDecl = D; | ||||||
13159 | } else if (!Context.hasSameType(DT->getDeducedType(), Deduced)) { | ||||||
13160 | auto *AT = dyn_cast<AutoType>(DT); | ||||||
13161 | Diag(D->getTypeSourceInfo()->getTypeLoc().getBeginLoc(), | ||||||
13162 | diag::err_auto_different_deductions) | ||||||
13163 | << (AT ? (unsigned)AT->getKeyword() : 3) | ||||||
13164 | << Deduced << DeducedDecl->getDeclName() | ||||||
13165 | << DT->getDeducedType() << D->getDeclName() | ||||||
13166 | << DeducedDecl->getInit()->getSourceRange() | ||||||
13167 | << D->getInit()->getSourceRange(); | ||||||
13168 | D->setInvalidDecl(); | ||||||
13169 | break; | ||||||
13170 | } | ||||||
13171 | } | ||||||
13172 | } | ||||||
13173 | |||||||
13174 | ActOnDocumentableDecls(Group); | ||||||
13175 | |||||||
13176 | return DeclGroupPtrTy::make( | ||||||
13177 | DeclGroupRef::Create(Context, Group.data(), Group.size())); | ||||||
13178 | } | ||||||
13179 | |||||||
13180 | void Sema::ActOnDocumentableDecl(Decl *D) { | ||||||
13181 | ActOnDocumentableDecls(D); | ||||||
13182 | } | ||||||
13183 | |||||||
13184 | void Sema::ActOnDocumentableDecls(ArrayRef<Decl *> Group) { | ||||||
13185 | // Don't parse the comment if Doxygen diagnostics are ignored. | ||||||
13186 | if (Group.empty() || !Group[0]) | ||||||
13187 | return; | ||||||
13188 | |||||||
13189 | if (Diags.isIgnored(diag::warn_doc_param_not_found, | ||||||
13190 | Group[0]->getLocation()) && | ||||||
13191 | Diags.isIgnored(diag::warn_unknown_comment_command_name, | ||||||
13192 | Group[0]->getLocation())) | ||||||
13193 | return; | ||||||
13194 | |||||||
13195 | if (Group.size() >= 2) { | ||||||
13196 | // This is a decl group. Normally it will contain only declarations | ||||||
13197 | // produced from declarator list. But in case we have any definitions or | ||||||
13198 | // additional declaration references: | ||||||
13199 | // 'typedef struct S {} S;' | ||||||
13200 | // 'typedef struct S *S;' | ||||||
13201 | // 'struct S *pS;' | ||||||
13202 | // FinalizeDeclaratorGroup adds these as separate declarations. | ||||||
13203 | Decl *MaybeTagDecl = Group[0]; | ||||||
13204 | if (MaybeTagDecl && isa<TagDecl>(MaybeTagDecl)) { | ||||||
13205 | Group = Group.slice(1); | ||||||
13206 | } | ||||||
13207 | } | ||||||
13208 | |||||||
13209 | // FIMXE: We assume every Decl in the group is in the same file. | ||||||
13210 | // This is false when preprocessor constructs the group from decls in | ||||||
13211 | // different files (e. g. macros or #include). | ||||||
13212 | Context.attachCommentsToJustParsedDecls(Group, &getPreprocessor()); | ||||||
13213 | } | ||||||
13214 | |||||||
13215 | /// Common checks for a parameter-declaration that should apply to both function | ||||||
13216 | /// parameters and non-type template parameters. | ||||||
13217 | void Sema::CheckFunctionOrTemplateParamDeclarator(Scope *S, Declarator &D) { | ||||||
13218 | // Check that there are no default arguments inside the type of this | ||||||
13219 | // parameter. | ||||||
13220 | if (getLangOpts().CPlusPlus) | ||||||
13221 | CheckExtraCXXDefaultArguments(D); | ||||||
13222 | |||||||
13223 | // Parameter declarators cannot be qualified (C++ [dcl.meaning]p1). | ||||||
13224 | if (D.getCXXScopeSpec().isSet()) { | ||||||
13225 | Diag(D.getIdentifierLoc(), diag::err_qualified_param_declarator) | ||||||
13226 | << D.getCXXScopeSpec().getRange(); | ||||||
13227 | } | ||||||
13228 | |||||||
13229 | // [dcl.meaning]p1: An unqualified-id occurring in a declarator-id shall be a | ||||||
13230 | // simple identifier except [...irrelevant cases...]. | ||||||
13231 | switch (D.getName().getKind()) { | ||||||
13232 | case UnqualifiedIdKind::IK_Identifier: | ||||||
13233 | break; | ||||||
13234 | |||||||
13235 | case UnqualifiedIdKind::IK_OperatorFunctionId: | ||||||
13236 | case UnqualifiedIdKind::IK_ConversionFunctionId: | ||||||
13237 | case UnqualifiedIdKind::IK_LiteralOperatorId: | ||||||
13238 | case UnqualifiedIdKind::IK_ConstructorName: | ||||||
13239 | case UnqualifiedIdKind::IK_DestructorName: | ||||||
13240 | case UnqualifiedIdKind::IK_ImplicitSelfParam: | ||||||
13241 | case UnqualifiedIdKind::IK_DeductionGuideName: | ||||||
13242 | Diag(D.getIdentifierLoc(), diag::err_bad_parameter_name) | ||||||
13243 | << GetNameForDeclarator(D).getName(); | ||||||
13244 | break; | ||||||
13245 | |||||||
13246 | case UnqualifiedIdKind::IK_TemplateId: | ||||||
13247 | case UnqualifiedIdKind::IK_ConstructorTemplateId: | ||||||
13248 | // GetNameForDeclarator would not produce a useful name in this case. | ||||||
13249 | Diag(D.getIdentifierLoc(), diag::err_bad_parameter_name_template_id); | ||||||
13250 | break; | ||||||
13251 | } | ||||||
13252 | } | ||||||
13253 | |||||||
13254 | /// ActOnParamDeclarator - Called from Parser::ParseFunctionDeclarator() | ||||||
13255 | /// to introduce parameters into function prototype scope. | ||||||
13256 | Decl *Sema::ActOnParamDeclarator(Scope *S, Declarator &D) { | ||||||
13257 | const DeclSpec &DS = D.getDeclSpec(); | ||||||
13258 | |||||||
13259 | // Verify C99 6.7.5.3p2: The only SCS allowed is 'register'. | ||||||
13260 | |||||||
13261 | // C++03 [dcl.stc]p2 also permits 'auto'. | ||||||
13262 | StorageClass SC = SC_None; | ||||||
13263 | if (DS.getStorageClassSpec() == DeclSpec::SCS_register) { | ||||||
13264 | SC = SC_Register; | ||||||
13265 | // In C++11, the 'register' storage class specifier is deprecated. | ||||||
13266 | // In C++17, it is not allowed, but we tolerate it as an extension. | ||||||
13267 | if (getLangOpts().CPlusPlus11) { | ||||||
13268 | Diag(DS.getStorageClassSpecLoc(), | ||||||
13269 | getLangOpts().CPlusPlus17 ? diag::ext_register_storage_class | ||||||
13270 | : diag::warn_deprecated_register) | ||||||
13271 | << FixItHint::CreateRemoval(DS.getStorageClassSpecLoc()); | ||||||
13272 | } | ||||||
13273 | } else if (getLangOpts().CPlusPlus && | ||||||
13274 | DS.getStorageClassSpec() == DeclSpec::SCS_auto) { | ||||||
13275 | SC = SC_Auto; | ||||||
13276 | } else if (DS.getStorageClassSpec() != DeclSpec::SCS_unspecified) { | ||||||
13277 | Diag(DS.getStorageClassSpecLoc(), | ||||||
13278 | diag::err_invalid_storage_class_in_func_decl); | ||||||
13279 | D.getMutableDeclSpec().ClearStorageClassSpecs(); | ||||||
13280 | } | ||||||
13281 | |||||||
13282 | if (DeclSpec::TSCS TSCS = DS.getThreadStorageClassSpec()) | ||||||
13283 | Diag(DS.getThreadStorageClassSpecLoc(), diag::err_invalid_thread) | ||||||
13284 | << DeclSpec::getSpecifierName(TSCS); | ||||||
13285 | if (DS.isInlineSpecified()) | ||||||
13286 | Diag(DS.getInlineSpecLoc(), diag::err_inline_non_function) | ||||||
13287 | << getLangOpts().CPlusPlus17; | ||||||
13288 | if (DS.hasConstexprSpecifier()) | ||||||
13289 | Diag(DS.getConstexprSpecLoc(), diag::err_invalid_constexpr) | ||||||
13290 | << 0 << D.getDeclSpec().getConstexprSpecifier(); | ||||||
13291 | |||||||
13292 | DiagnoseFunctionSpecifiers(DS); | ||||||
13293 | |||||||
13294 | CheckFunctionOrTemplateParamDeclarator(S, D); | ||||||
13295 | |||||||
13296 | TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S); | ||||||
13297 | QualType parmDeclType = TInfo->getType(); | ||||||
13298 | |||||||
13299 | // Check for redeclaration of parameters, e.g. int foo(int x, int x); | ||||||
13300 | IdentifierInfo *II = D.getIdentifier(); | ||||||
13301 | if (II) { | ||||||
13302 | LookupResult R(*this, II, D.getIdentifierLoc(), LookupOrdinaryName, | ||||||
13303 | ForVisibleRedeclaration); | ||||||
13304 | LookupName(R, S); | ||||||
13305 | if (R.isSingleResult()) { | ||||||
13306 | NamedDecl *PrevDecl = R.getFoundDecl(); | ||||||
13307 | if (PrevDecl->isTemplateParameter()) { | ||||||
13308 | // Maybe we will complain about the shadowed template parameter. | ||||||
13309 | DiagnoseTemplateParameterShadow(D.getIdentifierLoc(), PrevDecl); | ||||||
13310 | // Just pretend that we didn't see the previous declaration. | ||||||
13311 | PrevDecl = nullptr; | ||||||
13312 | } else if (S->isDeclScope(PrevDecl)) { | ||||||
13313 | Diag(D.getIdentifierLoc(), diag::err_param_redefinition) << II; | ||||||
13314 | Diag(PrevDecl->getLocation(), diag::note_previous_declaration); | ||||||
13315 | |||||||
13316 | // Recover by removing the name | ||||||
13317 | II = nullptr; | ||||||
13318 | D.SetIdentifier(nullptr, D.getIdentifierLoc()); | ||||||
13319 | D.setInvalidType(true); | ||||||
13320 | } | ||||||
13321 | } | ||||||
13322 | } | ||||||
13323 | |||||||
13324 | // Temporarily put parameter variables in the translation unit, not | ||||||
13325 | // the enclosing context. This prevents them from accidentally | ||||||
13326 | // looking like class members in C++. | ||||||
13327 | ParmVarDecl *New = | ||||||
13328 | CheckParameter(Context.getTranslationUnitDecl(), D.getBeginLoc(), | ||||||
13329 | D.getIdentifierLoc(), II, parmDeclType, TInfo, SC); | ||||||
13330 | |||||||
13331 | if (D.isInvalidType()) | ||||||
13332 | New->setInvalidDecl(); | ||||||
13333 | |||||||
13334 | assert(S->isFunctionPrototypeScope())((S->isFunctionPrototypeScope()) ? static_cast<void> (0) : __assert_fail ("S->isFunctionPrototypeScope()", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 13334, __PRETTY_FUNCTION__)); | ||||||
13335 | assert(S->getFunctionPrototypeDepth() >= 1)((S->getFunctionPrototypeDepth() >= 1) ? static_cast< void> (0) : __assert_fail ("S->getFunctionPrototypeDepth() >= 1" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 13335, __PRETTY_FUNCTION__)); | ||||||
13336 | New->setScopeInfo(S->getFunctionPrototypeDepth() - 1, | ||||||
13337 | S->getNextFunctionPrototypeIndex()); | ||||||
13338 | |||||||
13339 | // Add the parameter declaration into this scope. | ||||||
13340 | S->AddDecl(New); | ||||||
13341 | if (II) | ||||||
13342 | IdResolver.AddDecl(New); | ||||||
13343 | |||||||
13344 | ProcessDeclAttributes(S, New, D); | ||||||
13345 | |||||||
13346 | if (D.getDeclSpec().isModulePrivateSpecified()) | ||||||
13347 | Diag(New->getLocation(), diag::err_module_private_local) | ||||||
13348 | << 1 << New->getDeclName() | ||||||
13349 | << SourceRange(D.getDeclSpec().getModulePrivateSpecLoc()) | ||||||
13350 | << FixItHint::CreateRemoval(D.getDeclSpec().getModulePrivateSpecLoc()); | ||||||
13351 | |||||||
13352 | if (New->hasAttr<BlocksAttr>()) { | ||||||
13353 | Diag(New->getLocation(), diag::err_block_on_nonlocal); | ||||||
13354 | } | ||||||
13355 | |||||||
13356 | if (getLangOpts().OpenCL) | ||||||
13357 | deduceOpenCLAddressSpace(New); | ||||||
13358 | |||||||
13359 | return New; | ||||||
13360 | } | ||||||
13361 | |||||||
13362 | /// Synthesizes a variable for a parameter arising from a | ||||||
13363 | /// typedef. | ||||||
13364 | ParmVarDecl *Sema::BuildParmVarDeclForTypedef(DeclContext *DC, | ||||||
13365 | SourceLocation Loc, | ||||||
13366 | QualType T) { | ||||||
13367 | /* FIXME: setting StartLoc == Loc. | ||||||
13368 | Would it be worth to modify callers so as to provide proper source | ||||||
13369 | location for the unnamed parameters, embedding the parameter's type? */ | ||||||
13370 | ParmVarDecl *Param = ParmVarDecl::Create(Context, DC, Loc, Loc, nullptr, | ||||||
13371 | T, Context.getTrivialTypeSourceInfo(T, Loc), | ||||||
13372 | SC_None, nullptr); | ||||||
13373 | Param->setImplicit(); | ||||||
13374 | return Param; | ||||||
13375 | } | ||||||
13376 | |||||||
13377 | void Sema::DiagnoseUnusedParameters(ArrayRef<ParmVarDecl *> Parameters) { | ||||||
13378 | // Don't diagnose unused-parameter errors in template instantiations; we | ||||||
13379 | // will already have done so in the template itself. | ||||||
13380 | if (inTemplateInstantiation()) | ||||||
13381 | return; | ||||||
13382 | |||||||
13383 | for (const ParmVarDecl *Parameter : Parameters) { | ||||||
13384 | if (!Parameter->isReferenced() && Parameter->getDeclName() && | ||||||
13385 | !Parameter->hasAttr<UnusedAttr>()) { | ||||||
13386 | Diag(Parameter->getLocation(), diag::warn_unused_parameter) | ||||||
13387 | << Parameter->getDeclName(); | ||||||
13388 | } | ||||||
13389 | } | ||||||
13390 | } | ||||||
13391 | |||||||
13392 | void Sema::DiagnoseSizeOfParametersAndReturnValue( | ||||||
13393 | ArrayRef<ParmVarDecl *> Parameters, QualType ReturnTy, NamedDecl *D) { | ||||||
13394 | if (LangOpts.NumLargeByValueCopy == 0) // No check. | ||||||
13395 | return; | ||||||
13396 | |||||||
13397 | // Warn if the return value is pass-by-value and larger than the specified | ||||||
13398 | // threshold. | ||||||
13399 | if (!ReturnTy->isDependentType() && ReturnTy.isPODType(Context)) { | ||||||
13400 | unsigned Size = Context.getTypeSizeInChars(ReturnTy).getQuantity(); | ||||||
13401 | if (Size > LangOpts.NumLargeByValueCopy) | ||||||
13402 | Diag(D->getLocation(), diag::warn_return_value_size) | ||||||
13403 | << D->getDeclName() << Size; | ||||||
13404 | } | ||||||
13405 | |||||||
13406 | // Warn if any parameter is pass-by-value and larger than the specified | ||||||
13407 | // threshold. | ||||||
13408 | for (const ParmVarDecl *Parameter : Parameters) { | ||||||
13409 | QualType T = Parameter->getType(); | ||||||
13410 | if (T->isDependentType() || !T.isPODType(Context)) | ||||||
13411 | continue; | ||||||
13412 | unsigned Size = Context.getTypeSizeInChars(T).getQuantity(); | ||||||
13413 | if (Size > LangOpts.NumLargeByValueCopy) | ||||||
13414 | Diag(Parameter->getLocation(), diag::warn_parameter_size) | ||||||
13415 | << Parameter->getDeclName() << Size; | ||||||
13416 | } | ||||||
13417 | } | ||||||
13418 | |||||||
13419 | ParmVarDecl *Sema::CheckParameter(DeclContext *DC, SourceLocation StartLoc, | ||||||
13420 | SourceLocation NameLoc, IdentifierInfo *Name, | ||||||
13421 | QualType T, TypeSourceInfo *TSInfo, | ||||||
13422 | StorageClass SC) { | ||||||
13423 | // In ARC, infer a lifetime qualifier for appropriate parameter types. | ||||||
13424 | if (getLangOpts().ObjCAutoRefCount && | ||||||
13425 | T.getObjCLifetime() == Qualifiers::OCL_None && | ||||||
13426 | T->isObjCLifetimeType()) { | ||||||
13427 | |||||||
13428 | Qualifiers::ObjCLifetime lifetime; | ||||||
13429 | |||||||
13430 | // Special cases for arrays: | ||||||
13431 | // - if it's const, use __unsafe_unretained | ||||||
13432 | // - otherwise, it's an error | ||||||
13433 | if (T->isArrayType()) { | ||||||
13434 | if (!T.isConstQualified()) { | ||||||
13435 | if (DelayedDiagnostics.shouldDelayDiagnostics()) | ||||||
13436 | DelayedDiagnostics.add( | ||||||
13437 | sema::DelayedDiagnostic::makeForbiddenType( | ||||||
13438 | NameLoc, diag::err_arc_array_param_no_ownership, T, false)); | ||||||
13439 | else | ||||||
13440 | Diag(NameLoc, diag::err_arc_array_param_no_ownership) | ||||||
13441 | << TSInfo->getTypeLoc().getSourceRange(); | ||||||
13442 | } | ||||||
13443 | lifetime = Qualifiers::OCL_ExplicitNone; | ||||||
13444 | } else { | ||||||
13445 | lifetime = T->getObjCARCImplicitLifetime(); | ||||||
13446 | } | ||||||
13447 | T = Context.getLifetimeQualifiedType(T, lifetime); | ||||||
13448 | } | ||||||
13449 | |||||||
13450 | ParmVarDecl *New = ParmVarDecl::Create(Context, DC, StartLoc, NameLoc, Name, | ||||||
13451 | Context.getAdjustedParameterType(T), | ||||||
13452 | TSInfo, SC, nullptr); | ||||||
13453 | |||||||
13454 | // Make a note if we created a new pack in the scope of a lambda, so that | ||||||
13455 | // we know that references to that pack must also be expanded within the | ||||||
13456 | // lambda scope. | ||||||
13457 | if (New->isParameterPack()) | ||||||
13458 | if (auto *LSI = getEnclosingLambda()) | ||||||
13459 | LSI->LocalPacks.push_back(New); | ||||||
13460 | |||||||
13461 | if (New->getType().hasNonTrivialToPrimitiveDestructCUnion() || | ||||||
13462 | New->getType().hasNonTrivialToPrimitiveCopyCUnion()) | ||||||
13463 | checkNonTrivialCUnion(New->getType(), New->getLocation(), | ||||||
13464 | NTCUC_FunctionParam, NTCUK_Destruct|NTCUK_Copy); | ||||||
13465 | |||||||
13466 | // Parameters can not be abstract class types. | ||||||
13467 | // For record types, this is done by the AbstractClassUsageDiagnoser once | ||||||
13468 | // the class has been completely parsed. | ||||||
13469 | if (!CurContext->isRecord() && | ||||||
13470 | RequireNonAbstractType(NameLoc, T, diag::err_abstract_type_in_decl, | ||||||
13471 | AbstractParamType)) | ||||||
13472 | New->setInvalidDecl(); | ||||||
13473 | |||||||
13474 | // Parameter declarators cannot be interface types. All ObjC objects are | ||||||
13475 | // passed by reference. | ||||||
13476 | if (T->isObjCObjectType()) { | ||||||
13477 | SourceLocation TypeEndLoc = | ||||||
13478 | getLocForEndOfToken(TSInfo->getTypeLoc().getEndLoc()); | ||||||
13479 | Diag(NameLoc, | ||||||
13480 | diag::err_object_cannot_be_passed_returned_by_value) << 1 << T | ||||||
13481 | << FixItHint::CreateInsertion(TypeEndLoc, "*"); | ||||||
13482 | T = Context.getObjCObjectPointerType(T); | ||||||
13483 | New->setType(T); | ||||||
13484 | } | ||||||
13485 | |||||||
13486 | // ISO/IEC TR 18037 S6.7.3: "The type of an object with automatic storage | ||||||
13487 | // duration shall not be qualified by an address-space qualifier." | ||||||
13488 | // Since all parameters have automatic store duration, they can not have | ||||||
13489 | // an address space. | ||||||
13490 | if (T.getAddressSpace() != LangAS::Default && | ||||||
13491 | // OpenCL allows function arguments declared to be an array of a type | ||||||
13492 | // to be qualified with an address space. | ||||||
13493 | !(getLangOpts().OpenCL && | ||||||
13494 | (T->isArrayType() || T.getAddressSpace() == LangAS::opencl_private))) { | ||||||
13495 | Diag(NameLoc, diag::err_arg_with_address_space); | ||||||
13496 | New->setInvalidDecl(); | ||||||
13497 | } | ||||||
13498 | |||||||
13499 | return New; | ||||||
13500 | } | ||||||
13501 | |||||||
13502 | void Sema::ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, | ||||||
13503 | SourceLocation LocAfterDecls) { | ||||||
13504 | DeclaratorChunk::FunctionTypeInfo &FTI = D.getFunctionTypeInfo(); | ||||||
13505 | |||||||
13506 | // Verify 6.9.1p6: 'every identifier in the identifier list shall be declared' | ||||||
13507 | // for a K&R function. | ||||||
13508 | if (!FTI.hasPrototype) { | ||||||
13509 | for (int i = FTI.NumParams; i != 0; /* decrement in loop */) { | ||||||
13510 | --i; | ||||||
13511 | if (FTI.Params[i].Param == nullptr) { | ||||||
13512 | SmallString<256> Code; | ||||||
13513 | llvm::raw_svector_ostream(Code) | ||||||
13514 | << " int " << FTI.Params[i].Ident->getName() << ";\n"; | ||||||
13515 | Diag(FTI.Params[i].IdentLoc, diag::ext_param_not_declared) | ||||||
13516 | << FTI.Params[i].Ident | ||||||
13517 | << FixItHint::CreateInsertion(LocAfterDecls, Code); | ||||||
13518 | |||||||
13519 | // Implicitly declare the argument as type 'int' for lack of a better | ||||||
13520 | // type. | ||||||
13521 | AttributeFactory attrs; | ||||||
13522 | DeclSpec DS(attrs); | ||||||
13523 | const char* PrevSpec; // unused | ||||||
13524 | unsigned DiagID; // unused | ||||||
13525 | DS.SetTypeSpecType(DeclSpec::TST_int, FTI.Params[i].IdentLoc, PrevSpec, | ||||||
13526 | DiagID, Context.getPrintingPolicy()); | ||||||
13527 | // Use the identifier location for the type source range. | ||||||
13528 | DS.SetRangeStart(FTI.Params[i].IdentLoc); | ||||||
13529 | DS.SetRangeEnd(FTI.Params[i].IdentLoc); | ||||||
13530 | Declarator ParamD(DS, DeclaratorContext::KNRTypeListContext); | ||||||
13531 | ParamD.SetIdentifier(FTI.Params[i].Ident, FTI.Params[i].IdentLoc); | ||||||
13532 | FTI.Params[i].Param = ActOnParamDeclarator(S, ParamD); | ||||||
13533 | } | ||||||
13534 | } | ||||||
13535 | } | ||||||
13536 | } | ||||||
13537 | |||||||
13538 | Decl * | ||||||
13539 | Sema::ActOnStartOfFunctionDef(Scope *FnBodyScope, Declarator &D, | ||||||
13540 | MultiTemplateParamsArg TemplateParameterLists, | ||||||
13541 | SkipBodyInfo *SkipBody) { | ||||||
13542 | assert(getCurFunctionDecl() == nullptr && "Function parsing confused")((getCurFunctionDecl() == nullptr && "Function parsing confused" ) ? static_cast<void> (0) : __assert_fail ("getCurFunctionDecl() == nullptr && \"Function parsing confused\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 13542, __PRETTY_FUNCTION__)); | ||||||
13543 | assert(D.isFunctionDeclarator() && "Not a function declarator!")((D.isFunctionDeclarator() && "Not a function declarator!" ) ? static_cast<void> (0) : __assert_fail ("D.isFunctionDeclarator() && \"Not a function declarator!\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 13543, __PRETTY_FUNCTION__)); | ||||||
13544 | Scope *ParentScope = FnBodyScope->getParent(); | ||||||
13545 | |||||||
13546 | D.setFunctionDefinitionKind(FDK_Definition); | ||||||
13547 | Decl *DP = HandleDeclarator(ParentScope, D, TemplateParameterLists); | ||||||
13548 | return ActOnStartOfFunctionDef(FnBodyScope, DP, SkipBody); | ||||||
13549 | } | ||||||
13550 | |||||||
13551 | void Sema::ActOnFinishInlineFunctionDef(FunctionDecl *D) { | ||||||
13552 | Consumer.HandleInlineFunctionDefinition(D); | ||||||
13553 | } | ||||||
13554 | |||||||
13555 | static bool | ||||||
13556 | ShouldWarnAboutMissingPrototype(const FunctionDecl *FD, | ||||||
13557 | const FunctionDecl *&PossiblePrototype) { | ||||||
13558 | // Don't warn about invalid declarations. | ||||||
13559 | if (FD->isInvalidDecl()) | ||||||
13560 | return false; | ||||||
13561 | |||||||
13562 | // Or declarations that aren't global. | ||||||
13563 | if (!FD->isGlobal()) | ||||||
13564 | return false; | ||||||
13565 | |||||||
13566 | // Don't warn about C++ member functions. | ||||||
13567 | if (isa<CXXMethodDecl>(FD)) | ||||||
13568 | return false; | ||||||
13569 | |||||||
13570 | // Don't warn about 'main'. | ||||||
13571 | if (isa<TranslationUnitDecl>(FD->getDeclContext()->getRedeclContext())) | ||||||
13572 | if (IdentifierInfo *II = FD->getIdentifier()) | ||||||
13573 | if (II->isStr("main")) | ||||||
13574 | return false; | ||||||
13575 | |||||||
13576 | // Don't warn about inline functions. | ||||||
13577 | if (FD->isInlined()) | ||||||
13578 | return false; | ||||||
13579 | |||||||
13580 | // Don't warn about function templates. | ||||||
13581 | if (FD->getDescribedFunctionTemplate()) | ||||||
13582 | return false; | ||||||
13583 | |||||||
13584 | // Don't warn about function template specializations. | ||||||
13585 | if (FD->isFunctionTemplateSpecialization()) | ||||||
13586 | return false; | ||||||
13587 | |||||||
13588 | // Don't warn for OpenCL kernels. | ||||||
13589 | if (FD->hasAttr<OpenCLKernelAttr>()) | ||||||
13590 | return false; | ||||||
13591 | |||||||
13592 | // Don't warn on explicitly deleted functions. | ||||||
13593 | if (FD->isDeleted()) | ||||||
13594 | return false; | ||||||
13595 | |||||||
13596 | for (const FunctionDecl *Prev = FD->getPreviousDecl(); | ||||||
13597 | Prev; Prev = Prev->getPreviousDecl()) { | ||||||
13598 | // Ignore any declarations that occur in function or method | ||||||
13599 | // scope, because they aren't visible from the header. | ||||||
13600 | if (Prev->getLexicalDeclContext()->isFunctionOrMethod()) | ||||||
13601 | continue; | ||||||
13602 | |||||||
13603 | PossiblePrototype = Prev; | ||||||
13604 | return Prev->getType()->isFunctionNoProtoType(); | ||||||
13605 | } | ||||||
13606 | |||||||
13607 | return true; | ||||||
13608 | } | ||||||
13609 | |||||||
13610 | void | ||||||
13611 | Sema::CheckForFunctionRedefinition(FunctionDecl *FD, | ||||||
13612 | const FunctionDecl *EffectiveDefinition, | ||||||
13613 | SkipBodyInfo *SkipBody) { | ||||||
13614 | const FunctionDecl *Definition = EffectiveDefinition; | ||||||
13615 | if (!Definition && !FD->isDefined(Definition) && !FD->isCXXClassMember()) { | ||||||
13616 | // If this is a friend function defined in a class template, it does not | ||||||
13617 | // have a body until it is used, nevertheless it is a definition, see | ||||||
13618 | // [temp.inst]p2: | ||||||
13619 | // | ||||||
13620 | // ... for the purpose of determining whether an instantiated redeclaration | ||||||
13621 | // is valid according to [basic.def.odr] and [class.mem], a declaration that | ||||||
13622 | // corresponds to a definition in the template is considered to be a | ||||||
13623 | // definition. | ||||||
13624 | // | ||||||
13625 | // The following code must produce redefinition error: | ||||||
13626 | // | ||||||
13627 | // template<typename T> struct C20 { friend void func_20() {} }; | ||||||
13628 | // C20<int> c20i; | ||||||
13629 | // void func_20() {} | ||||||
13630 | // | ||||||
13631 | for (auto I : FD->redecls()) { | ||||||
13632 | if (I != FD && !I->isInvalidDecl() && | ||||||
13633 | I->getFriendObjectKind() != Decl::FOK_None) { | ||||||
13634 | if (FunctionDecl *Original = I->getInstantiatedFromMemberFunction()) { | ||||||
13635 | if (FunctionDecl *OrigFD = FD->getInstantiatedFromMemberFunction()) { | ||||||
13636 | // A merged copy of the same function, instantiated as a member of | ||||||
13637 | // the same class, is OK. | ||||||
13638 | if (declaresSameEntity(OrigFD, Original) && | ||||||
13639 | declaresSameEntity(cast<Decl>(I->getLexicalDeclContext()), | ||||||
13640 | cast<Decl>(FD->getLexicalDeclContext()))) | ||||||
13641 | continue; | ||||||
13642 | } | ||||||
13643 | |||||||
13644 | if (Original->isThisDeclarationADefinition()) { | ||||||
13645 | Definition = I; | ||||||
13646 | break; | ||||||
13647 | } | ||||||
13648 | } | ||||||
13649 | } | ||||||
13650 | } | ||||||
13651 | } | ||||||
13652 | |||||||
13653 | if (!Definition) | ||||||
13654 | // Similar to friend functions a friend function template may be a | ||||||
13655 | // definition and do not have a body if it is instantiated in a class | ||||||
13656 | // template. | ||||||
13657 | if (FunctionTemplateDecl *FTD = FD->getDescribedFunctionTemplate()) { | ||||||
13658 | for (auto I : FTD->redecls()) { | ||||||
13659 | auto D = cast<FunctionTemplateDecl>(I); | ||||||
13660 | if (D != FTD) { | ||||||
13661 | assert(!D->isThisDeclarationADefinition() &&((!D->isThisDeclarationADefinition() && "More than one definition in redeclaration chain" ) ? static_cast<void> (0) : __assert_fail ("!D->isThisDeclarationADefinition() && \"More than one definition in redeclaration chain\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 13662, __PRETTY_FUNCTION__)) | ||||||
13662 | "More than one definition in redeclaration chain")((!D->isThisDeclarationADefinition() && "More than one definition in redeclaration chain" ) ? static_cast<void> (0) : __assert_fail ("!D->isThisDeclarationADefinition() && \"More than one definition in redeclaration chain\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 13662, __PRETTY_FUNCTION__)); | ||||||
13663 | if (D->getFriendObjectKind() != Decl::FOK_None) | ||||||
13664 | if (FunctionTemplateDecl *FT = | ||||||
13665 | D->getInstantiatedFromMemberTemplate()) { | ||||||
13666 | if (FT->isThisDeclarationADefinition()) { | ||||||
13667 | Definition = D->getTemplatedDecl(); | ||||||
13668 | break; | ||||||
13669 | } | ||||||
13670 | } | ||||||
13671 | } | ||||||
13672 | } | ||||||
13673 | } | ||||||
13674 | |||||||
13675 | if (!Definition) | ||||||
13676 | return; | ||||||
13677 | |||||||
13678 | if (canRedefineFunction(Definition, getLangOpts())) | ||||||
13679 | return; | ||||||
13680 | |||||||
13681 | // Don't emit an error when this is redefinition of a typo-corrected | ||||||
13682 | // definition. | ||||||
13683 | if (TypoCorrectedFunctionDefinitions.count(Definition)) | ||||||
13684 | return; | ||||||
13685 | |||||||
13686 | // If we don't have a visible definition of the function, and it's inline or | ||||||
13687 | // a template, skip the new definition. | ||||||
13688 | if (SkipBody && !hasVisibleDefinition(Definition) && | ||||||
13689 | (Definition->getFormalLinkage() == InternalLinkage || | ||||||
13690 | Definition->isInlined() || | ||||||
13691 | Definition->getDescribedFunctionTemplate() || | ||||||
13692 | Definition->getNumTemplateParameterLists())) { | ||||||
13693 | SkipBody->ShouldSkip = true; | ||||||
13694 | SkipBody->Previous = const_cast<FunctionDecl*>(Definition); | ||||||
13695 | if (auto *TD = Definition->getDescribedFunctionTemplate()) | ||||||
13696 | makeMergedDefinitionVisible(TD); | ||||||
13697 | makeMergedDefinitionVisible(const_cast<FunctionDecl*>(Definition)); | ||||||
13698 | return; | ||||||
13699 | } | ||||||
13700 | |||||||
13701 | if (getLangOpts().GNUMode && Definition->isInlineSpecified() && | ||||||
13702 | Definition->getStorageClass() == SC_Extern) | ||||||
13703 | Diag(FD->getLocation(), diag::err_redefinition_extern_inline) | ||||||
13704 | << FD->getDeclName() << getLangOpts().CPlusPlus; | ||||||
13705 | else | ||||||
13706 | Diag(FD->getLocation(), diag::err_redefinition) << FD->getDeclName(); | ||||||
13707 | |||||||
13708 | Diag(Definition->getLocation(), diag::note_previous_definition); | ||||||
13709 | FD->setInvalidDecl(); | ||||||
13710 | } | ||||||
13711 | |||||||
13712 | static void RebuildLambdaScopeInfo(CXXMethodDecl *CallOperator, | ||||||
13713 | Sema &S) { | ||||||
13714 | CXXRecordDecl *const LambdaClass = CallOperator->getParent(); | ||||||
13715 | |||||||
13716 | LambdaScopeInfo *LSI = S.PushLambdaScope(); | ||||||
13717 | LSI->CallOperator = CallOperator; | ||||||
13718 | LSI->Lambda = LambdaClass; | ||||||
13719 | LSI->ReturnType = CallOperator->getReturnType(); | ||||||
13720 | const LambdaCaptureDefault LCD = LambdaClass->getLambdaCaptureDefault(); | ||||||
13721 | |||||||
13722 | if (LCD == LCD_None) | ||||||
13723 | LSI->ImpCaptureStyle = CapturingScopeInfo::ImpCap_None; | ||||||
13724 | else if (LCD == LCD_ByCopy) | ||||||
13725 | LSI->ImpCaptureStyle = CapturingScopeInfo::ImpCap_LambdaByval; | ||||||
13726 | else if (LCD == LCD_ByRef) | ||||||
13727 | LSI->ImpCaptureStyle = CapturingScopeInfo::ImpCap_LambdaByref; | ||||||
13728 | DeclarationNameInfo DNI = CallOperator->getNameInfo(); | ||||||
13729 | |||||||
13730 | LSI->IntroducerRange = DNI.getCXXOperatorNameRange(); | ||||||
13731 | LSI->Mutable = !CallOperator->isConst(); | ||||||
13732 | |||||||
13733 | // Add the captures to the LSI so they can be noted as already | ||||||
13734 | // captured within tryCaptureVar. | ||||||
13735 | auto I = LambdaClass->field_begin(); | ||||||
13736 | for (const auto &C : LambdaClass->captures()) { | ||||||
13737 | if (C.capturesVariable()) { | ||||||
13738 | VarDecl *VD = C.getCapturedVar(); | ||||||
13739 | if (VD->isInitCapture()) | ||||||
13740 | S.CurrentInstantiationScope->InstantiatedLocal(VD, VD); | ||||||
13741 | QualType CaptureType = VD->getType(); | ||||||
13742 | const bool ByRef = C.getCaptureKind() == LCK_ByRef; | ||||||
13743 | LSI->addCapture(VD, /*IsBlock*/false, ByRef, | ||||||
13744 | /*RefersToEnclosingVariableOrCapture*/true, C.getLocation(), | ||||||
13745 | /*EllipsisLoc*/C.isPackExpansion() | ||||||
13746 | ? C.getEllipsisLoc() : SourceLocation(), | ||||||
13747 | CaptureType, /*Invalid*/false); | ||||||
13748 | |||||||
13749 | } else if (C.capturesThis()) { | ||||||
13750 | LSI->addThisCapture(/*Nested*/ false, C.getLocation(), I->getType(), | ||||||
13751 | C.getCaptureKind() == LCK_StarThis); | ||||||
13752 | } else { | ||||||
13753 | LSI->addVLATypeCapture(C.getLocation(), I->getCapturedVLAType(), | ||||||
13754 | I->getType()); | ||||||
13755 | } | ||||||
13756 | ++I; | ||||||
13757 | } | ||||||
13758 | } | ||||||
13759 | |||||||
13760 | Decl *Sema::ActOnStartOfFunctionDef(Scope *FnBodyScope, Decl *D, | ||||||
13761 | SkipBodyInfo *SkipBody) { | ||||||
13762 | if (!D) { | ||||||
13763 | // Parsing the function declaration failed in some way. Push on a fake scope | ||||||
13764 | // anyway so we can try to parse the function body. | ||||||
13765 | PushFunctionScope(); | ||||||
13766 | PushExpressionEvaluationContext(ExprEvalContexts.back().Context); | ||||||
13767 | return D; | ||||||
13768 | } | ||||||
13769 | |||||||
13770 | FunctionDecl *FD = nullptr; | ||||||
13771 | |||||||
13772 | if (FunctionTemplateDecl *FunTmpl = dyn_cast<FunctionTemplateDecl>(D)) | ||||||
13773 | FD = FunTmpl->getTemplatedDecl(); | ||||||
13774 | else | ||||||
13775 | FD = cast<FunctionDecl>(D); | ||||||
13776 | |||||||
13777 | // Do not push if it is a lambda because one is already pushed when building | ||||||
13778 | // the lambda in ActOnStartOfLambdaDefinition(). | ||||||
13779 | if (!isLambdaCallOperator(FD)) | ||||||
13780 | PushExpressionEvaluationContext( | ||||||
13781 | FD->isConsteval() ? ExpressionEvaluationContext::ConstantEvaluated | ||||||
13782 | : ExprEvalContexts.back().Context); | ||||||
13783 | |||||||
13784 | // Check for defining attributes before the check for redefinition. | ||||||
13785 | if (const auto *Attr = FD->getAttr<AliasAttr>()) { | ||||||
13786 | Diag(Attr->getLocation(), diag::err_alias_is_definition) << FD << 0; | ||||||
13787 | FD->dropAttr<AliasAttr>(); | ||||||
13788 | FD->setInvalidDecl(); | ||||||
13789 | } | ||||||
13790 | if (const auto *Attr = FD->getAttr<IFuncAttr>()) { | ||||||
13791 | Diag(Attr->getLocation(), diag::err_alias_is_definition) << FD << 1; | ||||||
13792 | FD->dropAttr<IFuncAttr>(); | ||||||
13793 | FD->setInvalidDecl(); | ||||||
13794 | } | ||||||
13795 | |||||||
13796 | // See if this is a redefinition. If 'will have body' is already set, then | ||||||
13797 | // these checks were already performed when it was set. | ||||||
13798 | if (!FD->willHaveBody() && !FD->isLateTemplateParsed()) { | ||||||
13799 | CheckForFunctionRedefinition(FD, nullptr, SkipBody); | ||||||
13800 | |||||||
13801 | // If we're skipping the body, we're done. Don't enter the scope. | ||||||
13802 | if (SkipBody && SkipBody->ShouldSkip) | ||||||
13803 | return D; | ||||||
13804 | } | ||||||
13805 | |||||||
13806 | // Mark this function as "will have a body eventually". This lets users to | ||||||
13807 | // call e.g. isInlineDefinitionExternallyVisible while we're still parsing | ||||||
13808 | // this function. | ||||||
13809 | FD->setWillHaveBody(); | ||||||
13810 | |||||||
13811 | // If we are instantiating a generic lambda call operator, push | ||||||
13812 | // a LambdaScopeInfo onto the function stack. But use the information | ||||||
13813 | // that's already been calculated (ActOnLambdaExpr) to prime the current | ||||||
13814 | // LambdaScopeInfo. | ||||||
13815 | // When the template operator is being specialized, the LambdaScopeInfo, | ||||||
13816 | // has to be properly restored so that tryCaptureVariable doesn't try | ||||||
13817 | // and capture any new variables. In addition when calculating potential | ||||||
13818 | // captures during transformation of nested lambdas, it is necessary to | ||||||
13819 | // have the LSI properly restored. | ||||||
13820 | if (isGenericLambdaCallOperatorSpecialization(FD)) { | ||||||
13821 | assert(inTemplateInstantiation() &&((inTemplateInstantiation() && "There should be an active template instantiation on the stack " "when instantiating a generic lambda!") ? static_cast<void > (0) : __assert_fail ("inTemplateInstantiation() && \"There should be an active template instantiation on the stack \" \"when instantiating a generic lambda!\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 13823, __PRETTY_FUNCTION__)) | ||||||
13822 | "There should be an active template instantiation on the stack "((inTemplateInstantiation() && "There should be an active template instantiation on the stack " "when instantiating a generic lambda!") ? static_cast<void > (0) : __assert_fail ("inTemplateInstantiation() && \"There should be an active template instantiation on the stack \" \"when instantiating a generic lambda!\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 13823, __PRETTY_FUNCTION__)) | ||||||
13823 | "when instantiating a generic lambda!")((inTemplateInstantiation() && "There should be an active template instantiation on the stack " "when instantiating a generic lambda!") ? static_cast<void > (0) : __assert_fail ("inTemplateInstantiation() && \"There should be an active template instantiation on the stack \" \"when instantiating a generic lambda!\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 13823, __PRETTY_FUNCTION__)); | ||||||
13824 | RebuildLambdaScopeInfo(cast<CXXMethodDecl>(D), *this); | ||||||
13825 | } else { | ||||||
13826 | // Enter a new function scope | ||||||
13827 | PushFunctionScope(); | ||||||
13828 | } | ||||||
13829 | |||||||
13830 | // Builtin functions cannot be defined. | ||||||
13831 | if (unsigned BuiltinID = FD->getBuiltinID()) { | ||||||
13832 | if (!Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID) && | ||||||
13833 | !Context.BuiltinInfo.isPredefinedRuntimeFunction(BuiltinID)) { | ||||||
13834 | Diag(FD->getLocation(), diag::err_builtin_definition) << FD; | ||||||
13835 | FD->setInvalidDecl(); | ||||||
13836 | } | ||||||
13837 | } | ||||||
13838 | |||||||
13839 | // The return type of a function definition must be complete | ||||||
13840 | // (C99 6.9.1p3, C++ [dcl.fct]p6). | ||||||
13841 | QualType ResultType = FD->getReturnType(); | ||||||
13842 | if (!ResultType->isDependentType() && !ResultType->isVoidType() && | ||||||
13843 | !FD->isInvalidDecl() && | ||||||
13844 | RequireCompleteType(FD->getLocation(), ResultType, | ||||||
13845 | diag::err_func_def_incomplete_result)) | ||||||
13846 | FD->setInvalidDecl(); | ||||||
13847 | |||||||
13848 | if (FnBodyScope) | ||||||
13849 | PushDeclContext(FnBodyScope, FD); | ||||||
13850 | |||||||
13851 | // Check the validity of our function parameters | ||||||
13852 | CheckParmsForFunctionDef(FD->parameters(), | ||||||
13853 | /*CheckParameterNames=*/true); | ||||||
13854 | |||||||
13855 | // Add non-parameter declarations already in the function to the current | ||||||
13856 | // scope. | ||||||
13857 | if (FnBodyScope) { | ||||||
13858 | for (Decl *NPD : FD->decls()) { | ||||||
13859 | auto *NonParmDecl = dyn_cast<NamedDecl>(NPD); | ||||||
13860 | if (!NonParmDecl) | ||||||
13861 | continue; | ||||||
13862 | assert(!isa<ParmVarDecl>(NonParmDecl) &&((!isa<ParmVarDecl>(NonParmDecl) && "parameters should not be in newly created FD yet" ) ? static_cast<void> (0) : __assert_fail ("!isa<ParmVarDecl>(NonParmDecl) && \"parameters should not be in newly created FD yet\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 13863, __PRETTY_FUNCTION__)) | ||||||
13863 | "parameters should not be in newly created FD yet")((!isa<ParmVarDecl>(NonParmDecl) && "parameters should not be in newly created FD yet" ) ? static_cast<void> (0) : __assert_fail ("!isa<ParmVarDecl>(NonParmDecl) && \"parameters should not be in newly created FD yet\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 13863, __PRETTY_FUNCTION__)); | ||||||
13864 | |||||||
13865 | // If the decl has a name, make it accessible in the current scope. | ||||||
13866 | if (NonParmDecl->getDeclName()) | ||||||
13867 | PushOnScopeChains(NonParmDecl, FnBodyScope, /*AddToContext=*/false); | ||||||
13868 | |||||||
13869 | // Similarly, dive into enums and fish their constants out, making them | ||||||
13870 | // accessible in this scope. | ||||||
13871 | if (auto *ED = dyn_cast<EnumDecl>(NonParmDecl)) { | ||||||
13872 | for (auto *EI : ED->enumerators()) | ||||||
13873 | PushOnScopeChains(EI, FnBodyScope, /*AddToContext=*/false); | ||||||
13874 | } | ||||||
13875 | } | ||||||
13876 | } | ||||||
13877 | |||||||
13878 | // Introduce our parameters into the function scope | ||||||
13879 | for (auto Param : FD->parameters()) { | ||||||
13880 | Param->setOwningFunction(FD); | ||||||
13881 | |||||||
13882 | // If this has an identifier, add it to the scope stack. | ||||||
13883 | if (Param->getIdentifier() && FnBodyScope) { | ||||||
13884 | CheckShadow(FnBodyScope, Param); | ||||||
13885 | |||||||
13886 | PushOnScopeChains(Param, FnBodyScope); | ||||||
13887 | } | ||||||
13888 | } | ||||||
13889 | |||||||
13890 | // Ensure that the function's exception specification is instantiated. | ||||||
13891 | if (const FunctionProtoType *FPT = FD->getType()->getAs<FunctionProtoType>()) | ||||||
13892 | ResolveExceptionSpec(D->getLocation(), FPT); | ||||||
13893 | |||||||
13894 | // dllimport cannot be applied to non-inline function definitions. | ||||||
13895 | if (FD->hasAttr<DLLImportAttr>() && !FD->isInlined() && | ||||||
13896 | !FD->isTemplateInstantiation()) { | ||||||
13897 | assert(!FD->hasAttr<DLLExportAttr>())((!FD->hasAttr<DLLExportAttr>()) ? static_cast<void > (0) : __assert_fail ("!FD->hasAttr<DLLExportAttr>()" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 13897, __PRETTY_FUNCTION__)); | ||||||
13898 | Diag(FD->getLocation(), diag::err_attribute_dllimport_function_definition); | ||||||
13899 | FD->setInvalidDecl(); | ||||||
13900 | return D; | ||||||
13901 | } | ||||||
13902 | // We want to attach documentation to original Decl (which might be | ||||||
13903 | // a function template). | ||||||
13904 | ActOnDocumentableDecl(D); | ||||||
13905 | if (getCurLexicalContext()->isObjCContainer() && | ||||||
13906 | getCurLexicalContext()->getDeclKind() != Decl::ObjCCategoryImpl && | ||||||
13907 | getCurLexicalContext()->getDeclKind() != Decl::ObjCImplementation) | ||||||
13908 | Diag(FD->getLocation(), diag::warn_function_def_in_objc_container); | ||||||
13909 | |||||||
13910 | return D; | ||||||
13911 | } | ||||||
13912 | |||||||
13913 | /// Given the set of return statements within a function body, | ||||||
13914 | /// compute the variables that are subject to the named return value | ||||||
13915 | /// optimization. | ||||||
13916 | /// | ||||||
13917 | /// Each of the variables that is subject to the named return value | ||||||
13918 | /// optimization will be marked as NRVO variables in the AST, and any | ||||||
13919 | /// return statement that has a marked NRVO variable as its NRVO candidate can | ||||||
13920 | /// use the named return value optimization. | ||||||
13921 | /// | ||||||
13922 | /// This function applies a very simplistic algorithm for NRVO: if every return | ||||||
13923 | /// statement in the scope of a variable has the same NRVO candidate, that | ||||||
13924 | /// candidate is an NRVO variable. | ||||||
13925 | void Sema::computeNRVO(Stmt *Body, FunctionScopeInfo *Scope) { | ||||||
13926 | ReturnStmt **Returns = Scope->Returns.data(); | ||||||
13927 | |||||||
13928 | for (unsigned I = 0, E = Scope->Returns.size(); I != E; ++I) { | ||||||
13929 | if (const VarDecl *NRVOCandidate = Returns[I]->getNRVOCandidate()) { | ||||||
13930 | if (!NRVOCandidate->isNRVOVariable()) | ||||||
13931 | Returns[I]->setNRVOCandidate(nullptr); | ||||||
13932 | } | ||||||
13933 | } | ||||||
13934 | } | ||||||
13935 | |||||||
13936 | bool Sema::canDelayFunctionBody(const Declarator &D) { | ||||||
13937 | // We can't delay parsing the body of a constexpr function template (yet). | ||||||
13938 | if (D.getDeclSpec().hasConstexprSpecifier()) | ||||||
13939 | return false; | ||||||
13940 | |||||||
13941 | // We can't delay parsing the body of a function template with a deduced | ||||||
13942 | // return type (yet). | ||||||
13943 | if (D.getDeclSpec().hasAutoTypeSpec()) { | ||||||
13944 | // If the placeholder introduces a non-deduced trailing return type, | ||||||
13945 | // we can still delay parsing it. | ||||||
13946 | if (D.getNumTypeObjects()) { | ||||||
13947 | const auto &Outer = D.getTypeObject(D.getNumTypeObjects() - 1); | ||||||
13948 | if (Outer.Kind == DeclaratorChunk::Function && | ||||||
13949 | Outer.Fun.hasTrailingReturnType()) { | ||||||
13950 | QualType Ty = GetTypeFromParser(Outer.Fun.getTrailingReturnType()); | ||||||
13951 | return Ty.isNull() || !Ty->isUndeducedType(); | ||||||
13952 | } | ||||||
13953 | } | ||||||
13954 | return false; | ||||||
13955 | } | ||||||
13956 | |||||||
13957 | return true; | ||||||
13958 | } | ||||||
13959 | |||||||
13960 | bool Sema::canSkipFunctionBody(Decl *D) { | ||||||
13961 | // We cannot skip the body of a function (or function template) which is | ||||||
13962 | // constexpr, since we may need to evaluate its body in order to parse the | ||||||
13963 | // rest of the file. | ||||||
13964 | // We cannot skip the body of a function with an undeduced return type, | ||||||
13965 | // because any callers of that function need to know the type. | ||||||
13966 | if (const FunctionDecl *FD = D->getAsFunction()) { | ||||||
13967 | if (FD->isConstexpr()) | ||||||
13968 | return false; | ||||||
13969 | // We can't simply call Type::isUndeducedType here, because inside template | ||||||
13970 | // auto can be deduced to a dependent type, which is not considered | ||||||
13971 | // "undeduced". | ||||||
13972 | if (FD->getReturnType()->getContainedDeducedType()) | ||||||
13973 | return false; | ||||||
13974 | } | ||||||
13975 | return Consumer.shouldSkipFunctionBody(D); | ||||||
13976 | } | ||||||
13977 | |||||||
13978 | Decl *Sema::ActOnSkippedFunctionBody(Decl *Decl) { | ||||||
13979 | if (!Decl) | ||||||
13980 | return nullptr; | ||||||
13981 | if (FunctionDecl *FD = Decl->getAsFunction()) | ||||||
13982 | FD->setHasSkippedBody(); | ||||||
13983 | else if (ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(Decl)) | ||||||
13984 | MD->setHasSkippedBody(); | ||||||
13985 | return Decl; | ||||||
13986 | } | ||||||
13987 | |||||||
13988 | Decl *Sema::ActOnFinishFunctionBody(Decl *D, Stmt *BodyArg) { | ||||||
13989 | return ActOnFinishFunctionBody(D, BodyArg, false); | ||||||
13990 | } | ||||||
13991 | |||||||
13992 | /// RAII object that pops an ExpressionEvaluationContext when exiting a function | ||||||
13993 | /// body. | ||||||
13994 | class ExitFunctionBodyRAII { | ||||||
13995 | public: | ||||||
13996 | ExitFunctionBodyRAII(Sema &S, bool IsLambda) : S(S), IsLambda(IsLambda) {} | ||||||
13997 | ~ExitFunctionBodyRAII() { | ||||||
13998 | if (!IsLambda) | ||||||
13999 | S.PopExpressionEvaluationContext(); | ||||||
14000 | } | ||||||
14001 | |||||||
14002 | private: | ||||||
14003 | Sema &S; | ||||||
14004 | bool IsLambda = false; | ||||||
14005 | }; | ||||||
14006 | |||||||
14007 | static void diagnoseImplicitlyRetainedSelf(Sema &S) { | ||||||
14008 | llvm::DenseMap<const BlockDecl *, bool> EscapeInfo; | ||||||
14009 | |||||||
14010 | auto IsOrNestedInEscapingBlock = [&](const BlockDecl *BD) { | ||||||
14011 | if (EscapeInfo.count(BD)) | ||||||
14012 | return EscapeInfo[BD]; | ||||||
14013 | |||||||
14014 | bool R = false; | ||||||
14015 | const BlockDecl *CurBD = BD; | ||||||
14016 | |||||||
14017 | do { | ||||||
14018 | R = !CurBD->doesNotEscape(); | ||||||
14019 | if (R) | ||||||
14020 | break; | ||||||
14021 | CurBD = CurBD->getParent()->getInnermostBlockDecl(); | ||||||
14022 | } while (CurBD); | ||||||
14023 | |||||||
14024 | return EscapeInfo[BD] = R; | ||||||
14025 | }; | ||||||
14026 | |||||||
14027 | // If the location where 'self' is implicitly retained is inside a escaping | ||||||
14028 | // block, emit a diagnostic. | ||||||
14029 | for (const std::pair<SourceLocation, const BlockDecl *> &P : | ||||||
14030 | S.ImplicitlyRetainedSelfLocs) | ||||||
14031 | if (IsOrNestedInEscapingBlock(P.second)) | ||||||
14032 | S.Diag(P.first, diag::warn_implicitly_retains_self) | ||||||
14033 | << FixItHint::CreateInsertion(P.first, "self->"); | ||||||
14034 | } | ||||||
14035 | |||||||
14036 | Decl *Sema::ActOnFinishFunctionBody(Decl *dcl, Stmt *Body, | ||||||
14037 | bool IsInstantiation) { | ||||||
14038 | FunctionDecl *FD = dcl ? dcl->getAsFunction() : nullptr; | ||||||
14039 | |||||||
14040 | sema::AnalysisBasedWarnings::Policy WP = AnalysisWarnings.getDefaultPolicy(); | ||||||
14041 | sema::AnalysisBasedWarnings::Policy *ActivePolicy = nullptr; | ||||||
14042 | |||||||
14043 | if (getLangOpts().Coroutines && getCurFunction()->isCoroutine()) | ||||||
14044 | CheckCompletedCoroutineBody(FD, Body); | ||||||
14045 | |||||||
14046 | // Do not call PopExpressionEvaluationContext() if it is a lambda because one | ||||||
14047 | // is already popped when finishing the lambda in BuildLambdaExpr(). This is | ||||||
14048 | // meant to pop the context added in ActOnStartOfFunctionDef(). | ||||||
14049 | ExitFunctionBodyRAII ExitRAII(*this, isLambdaCallOperator(FD)); | ||||||
14050 | |||||||
14051 | if (FD) { | ||||||
14052 | FD->setBody(Body); | ||||||
14053 | FD->setWillHaveBody(false); | ||||||
14054 | |||||||
14055 | if (getLangOpts().CPlusPlus14) { | ||||||
14056 | if (!FD->isInvalidDecl() && Body && !FD->isDependentContext() && | ||||||
14057 | FD->getReturnType()->isUndeducedType()) { | ||||||
14058 | // If the function has a deduced result type but contains no 'return' | ||||||
14059 | // statements, the result type as written must be exactly 'auto', and | ||||||
14060 | // the deduced result type is 'void'. | ||||||
14061 | if (!FD->getReturnType()->getAs<AutoType>()) { | ||||||
14062 | Diag(dcl->getLocation(), diag::err_auto_fn_no_return_but_not_auto) | ||||||
14063 | << FD->getReturnType(); | ||||||
14064 | FD->setInvalidDecl(); | ||||||
14065 | } else { | ||||||
14066 | // Substitute 'void' for the 'auto' in the type. | ||||||
14067 | TypeLoc ResultType = getReturnTypeLoc(FD); | ||||||
14068 | Context.adjustDeducedFunctionResultType( | ||||||
14069 | FD, SubstAutoType(ResultType.getType(), Context.VoidTy)); | ||||||
14070 | } | ||||||
14071 | } | ||||||
14072 | } else if (getLangOpts().CPlusPlus11 && isLambdaCallOperator(FD)) { | ||||||
14073 | // In C++11, we don't use 'auto' deduction rules for lambda call | ||||||
14074 | // operators because we don't support return type deduction. | ||||||
14075 | auto *LSI = getCurLambda(); | ||||||
14076 | if (LSI->HasImplicitReturnType) { | ||||||
14077 | deduceClosureReturnType(*LSI); | ||||||
14078 | |||||||
14079 | // C++11 [expr.prim.lambda]p4: | ||||||
14080 | // [...] if there are no return statements in the compound-statement | ||||||
14081 | // [the deduced type is] the type void | ||||||
14082 | QualType RetType = | ||||||
14083 | LSI->ReturnType.isNull() ? Context.VoidTy : LSI->ReturnType; | ||||||
14084 | |||||||
14085 | // Update the return type to the deduced type. | ||||||
14086 | const auto *Proto = FD->getType()->castAs<FunctionProtoType>(); | ||||||
14087 | FD->setType(Context.getFunctionType(RetType, Proto->getParamTypes(), | ||||||
14088 | Proto->getExtProtoInfo())); | ||||||
14089 | } | ||||||
14090 | } | ||||||
14091 | |||||||
14092 | // If the function implicitly returns zero (like 'main') or is naked, | ||||||
14093 | // don't complain about missing return statements. | ||||||
14094 | if (FD->hasImplicitReturnZero() || FD->hasAttr<NakedAttr>()) | ||||||
14095 | WP.disableCheckFallThrough(); | ||||||
14096 | |||||||
14097 | // MSVC permits the use of pure specifier (=0) on function definition, | ||||||
14098 | // defined at class scope, warn about this non-standard construct. | ||||||
14099 | if (getLangOpts().MicrosoftExt && FD->isPure() && !FD->isOutOfLine()) | ||||||
14100 | Diag(FD->getLocation(), diag::ext_pure_function_definition); | ||||||
14101 | |||||||
14102 | if (!FD->isInvalidDecl()) { | ||||||
14103 | // Don't diagnose unused parameters of defaulted or deleted functions. | ||||||
14104 | if (!FD->isDeleted() && !FD->isDefaulted() && !FD->hasSkippedBody()) | ||||||
14105 | DiagnoseUnusedParameters(FD->parameters()); | ||||||
14106 | DiagnoseSizeOfParametersAndReturnValue(FD->parameters(), | ||||||
14107 | FD->getReturnType(), FD); | ||||||
14108 | |||||||
14109 | // If this is a structor, we need a vtable. | ||||||
14110 | if (CXXConstructorDecl *Constructor = dyn_cast<CXXConstructorDecl>(FD)) | ||||||
14111 | MarkVTableUsed(FD->getLocation(), Constructor->getParent()); | ||||||
14112 | else if (CXXDestructorDecl *Destructor = dyn_cast<CXXDestructorDecl>(FD)) | ||||||
14113 | MarkVTableUsed(FD->getLocation(), Destructor->getParent()); | ||||||
14114 | |||||||
14115 | // Try to apply the named return value optimization. We have to check | ||||||
14116 | // if we can do this here because lambdas keep return statements around | ||||||
14117 | // to deduce an implicit return type. | ||||||
14118 | if (FD->getReturnType()->isRecordType() && | ||||||
14119 | (!getLangOpts().CPlusPlus || !FD->isDependentContext())) | ||||||
14120 | computeNRVO(Body, getCurFunction()); | ||||||
14121 | } | ||||||
14122 | |||||||
14123 | // GNU warning -Wmissing-prototypes: | ||||||
14124 | // Warn if a global function is defined without a previous | ||||||
14125 | // prototype declaration. This warning is issued even if the | ||||||
14126 | // definition itself provides a prototype. The aim is to detect | ||||||
14127 | // global functions that fail to be declared in header files. | ||||||
14128 | const FunctionDecl *PossiblePrototype = nullptr; | ||||||
14129 | if (ShouldWarnAboutMissingPrototype(FD, PossiblePrototype)) { | ||||||
14130 | Diag(FD->getLocation(), diag::warn_missing_prototype) << FD; | ||||||
14131 | |||||||
14132 | if (PossiblePrototype) { | ||||||
14133 | // We found a declaration that is not a prototype, | ||||||
14134 | // but that could be a zero-parameter prototype | ||||||
14135 | if (TypeSourceInfo *TI = PossiblePrototype->getTypeSourceInfo()) { | ||||||
14136 | TypeLoc TL = TI->getTypeLoc(); | ||||||
14137 | if (FunctionNoProtoTypeLoc FTL = TL.getAs<FunctionNoProtoTypeLoc>()) | ||||||
14138 | Diag(PossiblePrototype->getLocation(), | ||||||
14139 | diag::note_declaration_not_a_prototype) | ||||||
14140 | << (FD->getNumParams() != 0) | ||||||
14141 | << (FD->getNumParams() == 0 | ||||||
14142 | ? FixItHint::CreateInsertion(FTL.getRParenLoc(), "void") | ||||||
14143 | : FixItHint{}); | ||||||
14144 | } | ||||||
14145 | } else { | ||||||
14146 | Diag(FD->getTypeSpecStartLoc(), diag::note_static_for_internal_linkage) | ||||||
14147 | << /* function */ 1 | ||||||
14148 | << (FD->getStorageClass() == SC_None | ||||||
14149 | ? FixItHint::CreateInsertion(FD->getTypeSpecStartLoc(), | ||||||
14150 | "static ") | ||||||
14151 | : FixItHint{}); | ||||||
14152 | } | ||||||
14153 | |||||||
14154 | // GNU warning -Wstrict-prototypes | ||||||
14155 | // Warn if K&R function is defined without a previous declaration. | ||||||
14156 | // This warning is issued only if the definition itself does not provide | ||||||
14157 | // a prototype. Only K&R definitions do not provide a prototype. | ||||||
14158 | if (!FD->hasWrittenPrototype()) { | ||||||
14159 | TypeSourceInfo *TI = FD->getTypeSourceInfo(); | ||||||
14160 | TypeLoc TL = TI->getTypeLoc(); | ||||||
14161 | FunctionTypeLoc FTL = TL.getAsAdjusted<FunctionTypeLoc>(); | ||||||
14162 | Diag(FTL.getLParenLoc(), diag::warn_strict_prototypes) << 2; | ||||||
14163 | } | ||||||
14164 | } | ||||||
14165 | |||||||
14166 | // Warn on CPUDispatch with an actual body. | ||||||
14167 | if (FD->isMultiVersion() && FD->hasAttr<CPUDispatchAttr>() && Body) | ||||||
14168 | if (const auto *CmpndBody = dyn_cast<CompoundStmt>(Body)) | ||||||
14169 | if (!CmpndBody->body_empty()) | ||||||
14170 | Diag(CmpndBody->body_front()->getBeginLoc(), | ||||||
14171 | diag::warn_dispatch_body_ignored); | ||||||
14172 | |||||||
14173 | if (auto *MD = dyn_cast<CXXMethodDecl>(FD)) { | ||||||
14174 | const CXXMethodDecl *KeyFunction; | ||||||
14175 | if (MD->isOutOfLine() && (MD = MD->getCanonicalDecl()) && | ||||||
14176 | MD->isVirtual() && | ||||||
14177 | (KeyFunction = Context.getCurrentKeyFunction(MD->getParent())) && | ||||||
14178 | MD == KeyFunction->getCanonicalDecl()) { | ||||||
14179 | // Update the key-function state if necessary for this ABI. | ||||||
14180 | if (FD->isInlined() && | ||||||
14181 | !Context.getTargetInfo().getCXXABI().canKeyFunctionBeInline()) { | ||||||
14182 | Context.setNonKeyFunction(MD); | ||||||
14183 | |||||||
14184 | // If the newly-chosen key function is already defined, then we | ||||||
14185 | // need to mark the vtable as used retroactively. | ||||||
14186 | KeyFunction = Context.getCurrentKeyFunction(MD->getParent()); | ||||||
14187 | const FunctionDecl *Definition; | ||||||
14188 | if (KeyFunction && KeyFunction->isDefined(Definition)) | ||||||
14189 | MarkVTableUsed(Definition->getLocation(), MD->getParent(), true); | ||||||
14190 | } else { | ||||||
14191 | // We just defined they key function; mark the vtable as used. | ||||||
14192 | MarkVTableUsed(FD->getLocation(), MD->getParent(), true); | ||||||
14193 | } | ||||||
14194 | } | ||||||
14195 | } | ||||||
14196 | |||||||
14197 | assert((FD == getCurFunctionDecl() || getCurLambda()->CallOperator == FD) &&(((FD == getCurFunctionDecl() || getCurLambda()->CallOperator == FD) && "Function parsing confused") ? static_cast <void> (0) : __assert_fail ("(FD == getCurFunctionDecl() || getCurLambda()->CallOperator == FD) && \"Function parsing confused\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 14198, __PRETTY_FUNCTION__)) | ||||||
14198 | "Function parsing confused")(((FD == getCurFunctionDecl() || getCurLambda()->CallOperator == FD) && "Function parsing confused") ? static_cast <void> (0) : __assert_fail ("(FD == getCurFunctionDecl() || getCurLambda()->CallOperator == FD) && \"Function parsing confused\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 14198, __PRETTY_FUNCTION__)); | ||||||
14199 | } else if (ObjCMethodDecl *MD = dyn_cast_or_null<ObjCMethodDecl>(dcl)) { | ||||||
14200 | assert(MD == getCurMethodDecl() && "Method parsing confused")((MD == getCurMethodDecl() && "Method parsing confused" ) ? static_cast<void> (0) : __assert_fail ("MD == getCurMethodDecl() && \"Method parsing confused\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 14200, __PRETTY_FUNCTION__)); | ||||||
14201 | MD->setBody(Body); | ||||||
14202 | if (!MD->isInvalidDecl()) { | ||||||
14203 | DiagnoseSizeOfParametersAndReturnValue(MD->parameters(), | ||||||
14204 | MD->getReturnType(), MD); | ||||||
14205 | |||||||
14206 | if (Body) | ||||||
14207 | computeNRVO(Body, getCurFunction()); | ||||||
14208 | } | ||||||
14209 | if (getCurFunction()->ObjCShouldCallSuper) { | ||||||
14210 | Diag(MD->getEndLoc(), diag::warn_objc_missing_super_call) | ||||||
14211 | << MD->getSelector().getAsString(); | ||||||
14212 | getCurFunction()->ObjCShouldCallSuper = false; | ||||||
14213 | } | ||||||
14214 | if (getCurFunction()->ObjCWarnForNoDesignatedInitChain) { | ||||||
14215 | const ObjCMethodDecl *InitMethod = nullptr; | ||||||
14216 | bool isDesignated = | ||||||
14217 | MD->isDesignatedInitializerForTheInterface(&InitMethod); | ||||||
14218 | assert(isDesignated && InitMethod)((isDesignated && InitMethod) ? static_cast<void> (0) : __assert_fail ("isDesignated && InitMethod", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 14218, __PRETTY_FUNCTION__)); | ||||||
14219 | (void)isDesignated; | ||||||
14220 | |||||||
14221 | auto superIsNSObject = [&](const ObjCMethodDecl *MD) { | ||||||
14222 | auto IFace = MD->getClassInterface(); | ||||||
14223 | if (!IFace) | ||||||
14224 | return false; | ||||||
14225 | auto SuperD = IFace->getSuperClass(); | ||||||
14226 | if (!SuperD) | ||||||
14227 | return false; | ||||||
14228 | return SuperD->getIdentifier() == | ||||||
14229 | NSAPIObj->getNSClassId(NSAPI::ClassId_NSObject); | ||||||
14230 | }; | ||||||
14231 | // Don't issue this warning for unavailable inits or direct subclasses | ||||||
14232 | // of NSObject. | ||||||
14233 | if (!MD->isUnavailable() && !superIsNSObject(MD)) { | ||||||
14234 | Diag(MD->getLocation(), | ||||||
14235 | diag::warn_objc_designated_init_missing_super_call); | ||||||
14236 | Diag(InitMethod->getLocation(), | ||||||
14237 | diag::note_objc_designated_init_marked_here); | ||||||
14238 | } | ||||||
14239 | getCurFunction()->ObjCWarnForNoDesignatedInitChain = false; | ||||||
14240 | } | ||||||
14241 | if (getCurFunction()->ObjCWarnForNoInitDelegation) { | ||||||
14242 | // Don't issue this warning for unavaialable inits. | ||||||
14243 | if (!MD->isUnavailable()) | ||||||
14244 | Diag(MD->getLocation(), | ||||||
14245 | diag::warn_objc_secondary_init_missing_init_call); | ||||||
14246 | getCurFunction()->ObjCWarnForNoInitDelegation = false; | ||||||
14247 | } | ||||||
14248 | |||||||
14249 | diagnoseImplicitlyRetainedSelf(*this); | ||||||
14250 | } else { | ||||||
14251 | // Parsing the function declaration failed in some way. Pop the fake scope | ||||||
14252 | // we pushed on. | ||||||
14253 | PopFunctionScopeInfo(ActivePolicy, dcl); | ||||||
14254 | return nullptr; | ||||||
14255 | } | ||||||
14256 | |||||||
14257 | if (Body && getCurFunction()->HasPotentialAvailabilityViolations) | ||||||
14258 | DiagnoseUnguardedAvailabilityViolations(dcl); | ||||||
14259 | |||||||
14260 | assert(!getCurFunction()->ObjCShouldCallSuper &&((!getCurFunction()->ObjCShouldCallSuper && "This should only be set for ObjC methods, which should have been " "handled in the block above.") ? static_cast<void> (0) : __assert_fail ("!getCurFunction()->ObjCShouldCallSuper && \"This should only be set for ObjC methods, which should have been \" \"handled in the block above.\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 14262, __PRETTY_FUNCTION__)) | ||||||
14261 | "This should only be set for ObjC methods, which should have been "((!getCurFunction()->ObjCShouldCallSuper && "This should only be set for ObjC methods, which should have been " "handled in the block above.") ? static_cast<void> (0) : __assert_fail ("!getCurFunction()->ObjCShouldCallSuper && \"This should only be set for ObjC methods, which should have been \" \"handled in the block above.\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 14262, __PRETTY_FUNCTION__)) | ||||||
14262 | "handled in the block above.")((!getCurFunction()->ObjCShouldCallSuper && "This should only be set for ObjC methods, which should have been " "handled in the block above.") ? static_cast<void> (0) : __assert_fail ("!getCurFunction()->ObjCShouldCallSuper && \"This should only be set for ObjC methods, which should have been \" \"handled in the block above.\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 14262, __PRETTY_FUNCTION__)); | ||||||
14263 | |||||||
14264 | // Verify and clean out per-function state. | ||||||
14265 | if (Body && (!FD || !FD->isDefaulted())) { | ||||||
14266 | // C++ constructors that have function-try-blocks can't have return | ||||||
14267 | // statements in the handlers of that block. (C++ [except.handle]p14) | ||||||
14268 | // Verify this. | ||||||
14269 | if (FD && isa<CXXConstructorDecl>(FD) && isa<CXXTryStmt>(Body)) | ||||||
14270 | DiagnoseReturnInConstructorExceptionHandler(cast<CXXTryStmt>(Body)); | ||||||
14271 | |||||||
14272 | // Verify that gotos and switch cases don't jump into scopes illegally. | ||||||
14273 | if (getCurFunction()->NeedsScopeChecking() && | ||||||
14274 | !PP.isCodeCompletionEnabled()) | ||||||
14275 | DiagnoseInvalidJumps(Body); | ||||||
14276 | |||||||
14277 | if (CXXDestructorDecl *Destructor = dyn_cast<CXXDestructorDecl>(dcl)) { | ||||||
14278 | if (!Destructor->getParent()->isDependentType()) | ||||||
14279 | CheckDestructor(Destructor); | ||||||
14280 | |||||||
14281 | MarkBaseAndMemberDestructorsReferenced(Destructor->getLocation(), | ||||||
14282 | Destructor->getParent()); | ||||||
14283 | } | ||||||
14284 | |||||||
14285 | // If any errors have occurred, clear out any temporaries that may have | ||||||
14286 | // been leftover. This ensures that these temporaries won't be picked up for | ||||||
14287 | // deletion in some later function. | ||||||
14288 | if (getDiagnostics().hasErrorOccurred() || | ||||||
14289 | getDiagnostics().getSuppressAllDiagnostics()) { | ||||||
14290 | DiscardCleanupsInEvaluationContext(); | ||||||
14291 | } | ||||||
14292 | if (!getDiagnostics().hasUncompilableErrorOccurred() && | ||||||
14293 | !isa<FunctionTemplateDecl>(dcl)) { | ||||||
14294 | // Since the body is valid, issue any analysis-based warnings that are | ||||||
14295 | // enabled. | ||||||
14296 | ActivePolicy = &WP; | ||||||
14297 | } | ||||||
14298 | |||||||
14299 | if (!IsInstantiation && FD && FD->isConstexpr() && !FD->isInvalidDecl() && | ||||||
14300 | !CheckConstexprFunctionDefinition(FD, CheckConstexprKind::Diagnose)) | ||||||
14301 | FD->setInvalidDecl(); | ||||||
14302 | |||||||
14303 | if (FD && FD->hasAttr<NakedAttr>()) { | ||||||
14304 | for (const Stmt *S : Body->children()) { | ||||||
14305 | // Allow local register variables without initializer as they don't | ||||||
14306 | // require prologue. | ||||||
14307 | bool RegisterVariables = false; | ||||||
14308 | if (auto *DS = dyn_cast<DeclStmt>(S)) { | ||||||
14309 | for (const auto *Decl : DS->decls()) { | ||||||
14310 | if (const auto *Var = dyn_cast<VarDecl>(Decl)) { | ||||||
14311 | RegisterVariables = | ||||||
14312 | Var->hasAttr<AsmLabelAttr>() && !Var->hasInit(); | ||||||
14313 | if (!RegisterVariables) | ||||||
14314 | break; | ||||||
14315 | } | ||||||
14316 | } | ||||||
14317 | } | ||||||
14318 | if (RegisterVariables) | ||||||
14319 | continue; | ||||||
14320 | if (!isa<AsmStmt>(S) && !isa<NullStmt>(S)) { | ||||||
14321 | Diag(S->getBeginLoc(), diag::err_non_asm_stmt_in_naked_function); | ||||||
14322 | Diag(FD->getAttr<NakedAttr>()->getLocation(), diag::note_attribute); | ||||||
14323 | FD->setInvalidDecl(); | ||||||
14324 | break; | ||||||
14325 | } | ||||||
14326 | } | ||||||
14327 | } | ||||||
14328 | |||||||
14329 | assert(ExprCleanupObjects.size() ==((ExprCleanupObjects.size() == ExprEvalContexts.back().NumCleanupObjects && "Leftover temporaries in function") ? static_cast <void> (0) : __assert_fail ("ExprCleanupObjects.size() == ExprEvalContexts.back().NumCleanupObjects && \"Leftover temporaries in function\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 14331, __PRETTY_FUNCTION__)) | ||||||
14330 | ExprEvalContexts.back().NumCleanupObjects &&((ExprCleanupObjects.size() == ExprEvalContexts.back().NumCleanupObjects && "Leftover temporaries in function") ? static_cast <void> (0) : __assert_fail ("ExprCleanupObjects.size() == ExprEvalContexts.back().NumCleanupObjects && \"Leftover temporaries in function\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 14331, __PRETTY_FUNCTION__)) | ||||||
14331 | "Leftover temporaries in function")((ExprCleanupObjects.size() == ExprEvalContexts.back().NumCleanupObjects && "Leftover temporaries in function") ? static_cast <void> (0) : __assert_fail ("ExprCleanupObjects.size() == ExprEvalContexts.back().NumCleanupObjects && \"Leftover temporaries in function\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 14331, __PRETTY_FUNCTION__)); | ||||||
14332 | assert(!Cleanup.exprNeedsCleanups() && "Unaccounted cleanups in function")((!Cleanup.exprNeedsCleanups() && "Unaccounted cleanups in function" ) ? static_cast<void> (0) : __assert_fail ("!Cleanup.exprNeedsCleanups() && \"Unaccounted cleanups in function\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 14332, __PRETTY_FUNCTION__)); | ||||||
14333 | assert(MaybeODRUseExprs.empty() &&((MaybeODRUseExprs.empty() && "Leftover expressions for odr-use checking" ) ? static_cast<void> (0) : __assert_fail ("MaybeODRUseExprs.empty() && \"Leftover expressions for odr-use checking\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 14334, __PRETTY_FUNCTION__)) | ||||||
14334 | "Leftover expressions for odr-use checking")((MaybeODRUseExprs.empty() && "Leftover expressions for odr-use checking" ) ? static_cast<void> (0) : __assert_fail ("MaybeODRUseExprs.empty() && \"Leftover expressions for odr-use checking\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 14334, __PRETTY_FUNCTION__)); | ||||||
14335 | } | ||||||
14336 | |||||||
14337 | if (!IsInstantiation) | ||||||
14338 | PopDeclContext(); | ||||||
14339 | |||||||
14340 | PopFunctionScopeInfo(ActivePolicy, dcl); | ||||||
14341 | // If any errors have occurred, clear out any temporaries that may have | ||||||
14342 | // been leftover. This ensures that these temporaries won't be picked up for | ||||||
14343 | // deletion in some later function. | ||||||
14344 | if (getDiagnostics().hasErrorOccurred()) { | ||||||
14345 | DiscardCleanupsInEvaluationContext(); | ||||||
14346 | } | ||||||
14347 | |||||||
14348 | return dcl; | ||||||
14349 | } | ||||||
14350 | |||||||
14351 | /// When we finish delayed parsing of an attribute, we must attach it to the | ||||||
14352 | /// relevant Decl. | ||||||
14353 | void Sema::ActOnFinishDelayedAttribute(Scope *S, Decl *D, | ||||||
14354 | ParsedAttributes &Attrs) { | ||||||
14355 | // Always attach attributes to the underlying decl. | ||||||
14356 | if (TemplateDecl *TD = dyn_cast<TemplateDecl>(D)) | ||||||
14357 | D = TD->getTemplatedDecl(); | ||||||
14358 | ProcessDeclAttributeList(S, D, Attrs); | ||||||
14359 | |||||||
14360 | if (CXXMethodDecl *Method = dyn_cast_or_null<CXXMethodDecl>(D)) | ||||||
14361 | if (Method->isStatic()) | ||||||
14362 | checkThisInStaticMemberFunctionAttributes(Method); | ||||||
14363 | } | ||||||
14364 | |||||||
14365 | /// ImplicitlyDefineFunction - An undeclared identifier was used in a function | ||||||
14366 | /// call, forming a call to an implicitly defined function (per C99 6.5.1p2). | ||||||
14367 | NamedDecl *Sema::ImplicitlyDefineFunction(SourceLocation Loc, | ||||||
14368 | IdentifierInfo &II, Scope *S) { | ||||||
14369 | // Find the scope in which the identifier is injected and the corresponding | ||||||
14370 | // DeclContext. | ||||||
14371 | // FIXME: C89 does not say what happens if there is no enclosing block scope. | ||||||
14372 | // In that case, we inject the declaration into the translation unit scope | ||||||
14373 | // instead. | ||||||
14374 | Scope *BlockScope = S; | ||||||
14375 | while (!BlockScope->isCompoundStmtScope() && BlockScope->getParent()) | ||||||
14376 | BlockScope = BlockScope->getParent(); | ||||||
14377 | |||||||
14378 | Scope *ContextScope = BlockScope; | ||||||
14379 | while (!ContextScope->getEntity()) | ||||||
14380 | ContextScope = ContextScope->getParent(); | ||||||
14381 | ContextRAII SavedContext(*this, ContextScope->getEntity()); | ||||||
14382 | |||||||
14383 | // Before we produce a declaration for an implicitly defined | ||||||
14384 | // function, see whether there was a locally-scoped declaration of | ||||||
14385 | // this name as a function or variable. If so, use that | ||||||
14386 | // (non-visible) declaration, and complain about it. | ||||||
14387 | NamedDecl *ExternCPrev = findLocallyScopedExternCDecl(&II); | ||||||
14388 | if (ExternCPrev) { | ||||||
14389 | // We still need to inject the function into the enclosing block scope so | ||||||
14390 | // that later (non-call) uses can see it. | ||||||
14391 | PushOnScopeChains(ExternCPrev, BlockScope, /*AddToContext*/false); | ||||||
14392 | |||||||
14393 | // C89 footnote 38: | ||||||
14394 | // If in fact it is not defined as having type "function returning int", | ||||||
14395 | // the behavior is undefined. | ||||||
14396 | if (!isa<FunctionDecl>(ExternCPrev) || | ||||||
14397 | !Context.typesAreCompatible( | ||||||
14398 | cast<FunctionDecl>(ExternCPrev)->getType(), | ||||||
14399 | Context.getFunctionNoProtoType(Context.IntTy))) { | ||||||
14400 | Diag(Loc, diag::ext_use_out_of_scope_declaration) | ||||||
14401 | << ExternCPrev << !getLangOpts().C99; | ||||||
14402 | Diag(ExternCPrev->getLocation(), diag::note_previous_declaration); | ||||||
14403 | return ExternCPrev; | ||||||
14404 | } | ||||||
14405 | } | ||||||
14406 | |||||||
14407 | // Extension in C99. Legal in C90, but warn about it. | ||||||
14408 | unsigned diag_id; | ||||||
14409 | if (II.getName().startswith("__builtin_")) | ||||||
14410 | diag_id = diag::warn_builtin_unknown; | ||||||
14411 | // OpenCL v2.0 s6.9.u - Implicit function declaration is not supported. | ||||||
14412 | else if (getLangOpts().OpenCL) | ||||||
14413 | diag_id = diag::err_opencl_implicit_function_decl; | ||||||
14414 | else if (getLangOpts().C99) | ||||||
14415 | diag_id = diag::ext_implicit_function_decl; | ||||||
14416 | else | ||||||
14417 | diag_id = diag::warn_implicit_function_decl; | ||||||
14418 | Diag(Loc, diag_id) << &II; | ||||||
14419 | |||||||
14420 | // If we found a prior declaration of this function, don't bother building | ||||||
14421 | // another one. We've already pushed that one into scope, so there's nothing | ||||||
14422 | // more to do. | ||||||
14423 | if (ExternCPrev) | ||||||
14424 | return ExternCPrev; | ||||||
14425 | |||||||
14426 | // Because typo correction is expensive, only do it if the implicit | ||||||
14427 | // function declaration is going to be treated as an error. | ||||||
14428 | if (Diags.getDiagnosticLevel(diag_id, Loc) >= DiagnosticsEngine::Error) { | ||||||
14429 | TypoCorrection Corrected; | ||||||
14430 | DeclFilterCCC<FunctionDecl> CCC{}; | ||||||
14431 | if (S && (Corrected = | ||||||
14432 | CorrectTypo(DeclarationNameInfo(&II, Loc), LookupOrdinaryName, | ||||||
14433 | S, nullptr, CCC, CTK_NonError))) | ||||||
14434 | diagnoseTypo(Corrected, PDiag(diag::note_function_suggestion), | ||||||
14435 | /*ErrorRecovery*/false); | ||||||
14436 | } | ||||||
14437 | |||||||
14438 | // Set a Declarator for the implicit definition: int foo(); | ||||||
14439 | const char *Dummy; | ||||||
14440 | AttributeFactory attrFactory; | ||||||
14441 | DeclSpec DS(attrFactory); | ||||||
14442 | unsigned DiagID; | ||||||
14443 | bool Error = DS.SetTypeSpecType(DeclSpec::TST_int, Loc, Dummy, DiagID, | ||||||
14444 | Context.getPrintingPolicy()); | ||||||
14445 | (void)Error; // Silence warning. | ||||||
14446 | assert(!Error && "Error setting up implicit decl!")((!Error && "Error setting up implicit decl!") ? static_cast <void> (0) : __assert_fail ("!Error && \"Error setting up implicit decl!\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 14446, __PRETTY_FUNCTION__)); | ||||||
14447 | SourceLocation NoLoc; | ||||||
14448 | Declarator D(DS, DeclaratorContext::BlockContext); | ||||||
14449 | D.AddTypeInfo(DeclaratorChunk::getFunction(/*HasProto=*/false, | ||||||
14450 | /*IsAmbiguous=*/false, | ||||||
14451 | /*LParenLoc=*/NoLoc, | ||||||
14452 | /*Params=*/nullptr, | ||||||
14453 | /*NumParams=*/0, | ||||||
14454 | /*EllipsisLoc=*/NoLoc, | ||||||
14455 | /*RParenLoc=*/NoLoc, | ||||||
14456 | /*RefQualifierIsLvalueRef=*/true, | ||||||
14457 | /*RefQualifierLoc=*/NoLoc, | ||||||
14458 | /*MutableLoc=*/NoLoc, EST_None, | ||||||
14459 | /*ESpecRange=*/SourceRange(), | ||||||
14460 | /*Exceptions=*/nullptr, | ||||||
14461 | /*ExceptionRanges=*/nullptr, | ||||||
14462 | /*NumExceptions=*/0, | ||||||
14463 | /*NoexceptExpr=*/nullptr, | ||||||
14464 | /*ExceptionSpecTokens=*/nullptr, | ||||||
14465 | /*DeclsInPrototype=*/None, Loc, | ||||||
14466 | Loc, D), | ||||||
14467 | std::move(DS.getAttributes()), SourceLocation()); | ||||||
14468 | D.SetIdentifier(&II, Loc); | ||||||
14469 | |||||||
14470 | // Insert this function into the enclosing block scope. | ||||||
14471 | FunctionDecl *FD = cast<FunctionDecl>(ActOnDeclarator(BlockScope, D)); | ||||||
14472 | FD->setImplicit(); | ||||||
14473 | |||||||
14474 | AddKnownFunctionAttributes(FD); | ||||||
14475 | |||||||
14476 | return FD; | ||||||
14477 | } | ||||||
14478 | |||||||
14479 | /// If this function is a C++ replaceable global allocation function | ||||||
14480 | /// (C++2a [basic.stc.dynamic.allocation], C++2a [new.delete]), | ||||||
14481 | /// adds any function attributes that we know a priori based on the standard. | ||||||
14482 | /// | ||||||
14483 | /// We need to check for duplicate attributes both here and where user-written | ||||||
14484 | /// attributes are applied to declarations. | ||||||
14485 | void Sema::AddKnownFunctionAttributesForReplaceableGlobalAllocationFunction( | ||||||
14486 | FunctionDecl *FD) { | ||||||
14487 | if (FD->isInvalidDecl()) | ||||||
14488 | return; | ||||||
14489 | |||||||
14490 | if (FD->getDeclName().getCXXOverloadedOperator() != OO_New && | ||||||
14491 | FD->getDeclName().getCXXOverloadedOperator() != OO_Array_New) | ||||||
14492 | return; | ||||||
14493 | |||||||
14494 | Optional<unsigned> AlignmentParam; | ||||||
14495 | bool IsNothrow = false; | ||||||
14496 | if (!FD->isReplaceableGlobalAllocationFunction(&AlignmentParam, &IsNothrow)) | ||||||
14497 | return; | ||||||
14498 | |||||||
14499 | // C++2a [basic.stc.dynamic.allocation]p4: | ||||||
14500 | // An allocation function that has a non-throwing exception specification | ||||||
14501 | // indicates failure by returning a null pointer value. Any other allocation | ||||||
14502 | // function never returns a null pointer value and indicates failure only by | ||||||
14503 | // throwing an exception [...] | ||||||
14504 | if (!IsNothrow && !FD->hasAttr<ReturnsNonNullAttr>()) | ||||||
14505 | FD->addAttr(ReturnsNonNullAttr::CreateImplicit(Context, FD->getLocation())); | ||||||
14506 | |||||||
14507 | // C++2a [basic.stc.dynamic.allocation]p2: | ||||||
14508 | // An allocation function attempts to allocate the requested amount of | ||||||
14509 | // storage. [...] If the request succeeds, the value returned by a | ||||||
14510 | // replaceable allocation function is a [...] pointer value p0 different | ||||||
14511 | // from any previously returned value p1 [...] | ||||||
14512 | // | ||||||
14513 | // However, this particular information is being added in codegen, | ||||||
14514 | // because there is an opt-out switch for it (-fno-assume-sane-operator-new) | ||||||
14515 | |||||||
14516 | // C++2a [basic.stc.dynamic.allocation]p2: | ||||||
14517 | // An allocation function attempts to allocate the requested amount of | ||||||
14518 | // storage. If it is successful, it returns the address of the start of a | ||||||
14519 | // block of storage whose length in bytes is at least as large as the | ||||||
14520 | // requested size. | ||||||
14521 | if (!FD->hasAttr<AllocSizeAttr>()) { | ||||||
14522 | FD->addAttr(AllocSizeAttr::CreateImplicit( | ||||||
14523 | Context, /*ElemSizeParam=*/ParamIdx(1, FD), | ||||||
14524 | /*NumElemsParam=*/ParamIdx(), FD->getLocation())); | ||||||
14525 | } | ||||||
14526 | |||||||
14527 | // C++2a [basic.stc.dynamic.allocation]p3: | ||||||
14528 | // For an allocation function [...], the pointer returned on a successful | ||||||
14529 | // call shall represent the address of storage that is aligned as follows: | ||||||
14530 | // (3.1) If the allocation function takes an argument of type | ||||||
14531 | // std​::​align_Âval_Ât, the storage will have the alignment | ||||||
14532 | // specified by the value of this argument. | ||||||
14533 | if (AlignmentParam.hasValue() && !FD->hasAttr<AllocAlignAttr>()) { | ||||||
14534 | FD->addAttr(AllocAlignAttr::CreateImplicit( | ||||||
14535 | Context, ParamIdx(AlignmentParam.getValue(), FD), FD->getLocation())); | ||||||
14536 | } | ||||||
14537 | |||||||
14538 | // FIXME: | ||||||
14539 | // C++2a [basic.stc.dynamic.allocation]p3: | ||||||
14540 | // For an allocation function [...], the pointer returned on a successful | ||||||
14541 | // call shall represent the address of storage that is aligned as follows: | ||||||
14542 | // (3.2) Otherwise, if the allocation function is named operator new[], | ||||||
14543 | // the storage is aligned for any object that does not have | ||||||
14544 | // new-extended alignment ([basic.align]) and is no larger than the | ||||||
14545 | // requested size. | ||||||
14546 | // (3.3) Otherwise, the storage is aligned for any object that does not | ||||||
14547 | // have new-extended alignment and is of the requested size. | ||||||
14548 | } | ||||||
14549 | |||||||
14550 | /// Adds any function attributes that we know a priori based on | ||||||
14551 | /// the declaration of this function. | ||||||
14552 | /// | ||||||
14553 | /// These attributes can apply both to implicitly-declared builtins | ||||||
14554 | /// (like __builtin___printf_chk) or to library-declared functions | ||||||
14555 | /// like NSLog or printf. | ||||||
14556 | /// | ||||||
14557 | /// We need to check for duplicate attributes both here and where user-written | ||||||
14558 | /// attributes are applied to declarations. | ||||||
14559 | void Sema::AddKnownFunctionAttributes(FunctionDecl *FD) { | ||||||
14560 | if (FD->isInvalidDecl()) | ||||||
14561 | return; | ||||||
14562 | |||||||
14563 | // If this is a built-in function, map its builtin attributes to | ||||||
14564 | // actual attributes. | ||||||
14565 | if (unsigned BuiltinID = FD->getBuiltinID()) { | ||||||
14566 | // Handle printf-formatting attributes. | ||||||
14567 | unsigned FormatIdx; | ||||||
14568 | bool HasVAListArg; | ||||||
14569 | if (Context.BuiltinInfo.isPrintfLike(BuiltinID, FormatIdx, HasVAListArg)) { | ||||||
14570 | if (!FD->hasAttr<FormatAttr>()) { | ||||||
14571 | const char *fmt = "printf"; | ||||||
14572 | unsigned int NumParams = FD->getNumParams(); | ||||||
14573 | if (FormatIdx < NumParams && // NumParams may be 0 (e.g. vfprintf) | ||||||
14574 | FD->getParamDecl(FormatIdx)->getType()->isObjCObjectPointerType()) | ||||||
14575 | fmt = "NSString"; | ||||||
14576 | FD->addAttr(FormatAttr::CreateImplicit(Context, | ||||||
14577 | &Context.Idents.get(fmt), | ||||||
14578 | FormatIdx+1, | ||||||
14579 | HasVAListArg ? 0 : FormatIdx+2, | ||||||
14580 | FD->getLocation())); | ||||||
14581 | } | ||||||
14582 | } | ||||||
14583 | if (Context.BuiltinInfo.isScanfLike(BuiltinID, FormatIdx, | ||||||
14584 | HasVAListArg)) { | ||||||
14585 | if (!FD->hasAttr<FormatAttr>()) | ||||||
14586 | FD->addAttr(FormatAttr::CreateImplicit(Context, | ||||||
14587 | &Context.Idents.get("scanf"), | ||||||
14588 | FormatIdx+1, | ||||||
14589 | HasVAListArg ? 0 : FormatIdx+2, | ||||||
14590 | FD->getLocation())); | ||||||
14591 | } | ||||||
14592 | |||||||
14593 | // Handle automatically recognized callbacks. | ||||||
14594 | SmallVector<int, 4> Encoding; | ||||||
14595 | if (!FD->hasAttr<CallbackAttr>() && | ||||||
14596 | Context.BuiltinInfo.performsCallback(BuiltinID, Encoding)) | ||||||
14597 | FD->addAttr(CallbackAttr::CreateImplicit( | ||||||
14598 | Context, Encoding.data(), Encoding.size(), FD->getLocation())); | ||||||
14599 | |||||||
14600 | // Mark const if we don't care about errno and that is the only thing | ||||||
14601 | // preventing the function from being const. This allows IRgen to use LLVM | ||||||
14602 | // intrinsics for such functions. | ||||||
14603 | if (!getLangOpts().MathErrno && !FD->hasAttr<ConstAttr>() && | ||||||
14604 | Context.BuiltinInfo.isConstWithoutErrno(BuiltinID)) | ||||||
14605 | FD->addAttr(ConstAttr::CreateImplicit(Context, FD->getLocation())); | ||||||
14606 | |||||||
14607 | // We make "fma" on some platforms const because we know it does not set | ||||||
14608 | // errno in those environments even though it could set errno based on the | ||||||
14609 | // C standard. | ||||||
14610 | const llvm::Triple &Trip = Context.getTargetInfo().getTriple(); | ||||||
14611 | if ((Trip.isGNUEnvironment() || Trip.isAndroid() || Trip.isOSMSVCRT()) && | ||||||
14612 | !FD->hasAttr<ConstAttr>()) { | ||||||
14613 | switch (BuiltinID) { | ||||||
14614 | case Builtin::BI__builtin_fma: | ||||||
14615 | case Builtin::BI__builtin_fmaf: | ||||||
14616 | case Builtin::BI__builtin_fmal: | ||||||
14617 | case Builtin::BIfma: | ||||||
14618 | case Builtin::BIfmaf: | ||||||
14619 | case Builtin::BIfmal: | ||||||
14620 | FD->addAttr(ConstAttr::CreateImplicit(Context, FD->getLocation())); | ||||||
14621 | break; | ||||||
14622 | default: | ||||||
14623 | break; | ||||||
14624 | } | ||||||
14625 | } | ||||||
14626 | |||||||
14627 | if (Context.BuiltinInfo.isReturnsTwice(BuiltinID) && | ||||||
14628 | !FD->hasAttr<ReturnsTwiceAttr>()) | ||||||
14629 | FD->addAttr(ReturnsTwiceAttr::CreateImplicit(Context, | ||||||
14630 | FD->getLocation())); | ||||||
14631 | if (Context.BuiltinInfo.isNoThrow(BuiltinID) && !FD->hasAttr<NoThrowAttr>()) | ||||||
14632 | FD->addAttr(NoThrowAttr::CreateImplicit(Context, FD->getLocation())); | ||||||
14633 | if (Context.BuiltinInfo.isPure(BuiltinID) && !FD->hasAttr<PureAttr>()) | ||||||
14634 | FD->addAttr(PureAttr::CreateImplicit(Context, FD->getLocation())); | ||||||
14635 | if (Context.BuiltinInfo.isConst(BuiltinID) && !FD->hasAttr<ConstAttr>()) | ||||||
14636 | FD->addAttr(ConstAttr::CreateImplicit(Context, FD->getLocation())); | ||||||
14637 | if (getLangOpts().CUDA && Context.BuiltinInfo.isTSBuiltin(BuiltinID) && | ||||||
14638 | !FD->hasAttr<CUDADeviceAttr>() && !FD->hasAttr<CUDAHostAttr>()) { | ||||||
14639 | // Add the appropriate attribute, depending on the CUDA compilation mode | ||||||
14640 | // and which target the builtin belongs to. For example, during host | ||||||
14641 | // compilation, aux builtins are __device__, while the rest are __host__. | ||||||
14642 | if (getLangOpts().CUDAIsDevice != | ||||||
14643 | Context.BuiltinInfo.isAuxBuiltinID(BuiltinID)) | ||||||
14644 | FD->addAttr(CUDADeviceAttr::CreateImplicit(Context, FD->getLocation())); | ||||||
14645 | else | ||||||
14646 | FD->addAttr(CUDAHostAttr::CreateImplicit(Context, FD->getLocation())); | ||||||
14647 | } | ||||||
14648 | } | ||||||
14649 | |||||||
14650 | AddKnownFunctionAttributesForReplaceableGlobalAllocationFunction(FD); | ||||||
14651 | |||||||
14652 | // If C++ exceptions are enabled but we are told extern "C" functions cannot | ||||||
14653 | // throw, add an implicit nothrow attribute to any extern "C" function we come | ||||||
14654 | // across. | ||||||
14655 | if (getLangOpts().CXXExceptions && getLangOpts().ExternCNoUnwind && | ||||||
14656 | FD->isExternC() && !FD->hasAttr<NoThrowAttr>()) { | ||||||
14657 | const auto *FPT = FD->getType()->getAs<FunctionProtoType>(); | ||||||
14658 | if (!FPT || FPT->getExceptionSpecType() == EST_None) | ||||||
14659 | FD->addAttr(NoThrowAttr::CreateImplicit(Context, FD->getLocation())); | ||||||
14660 | } | ||||||
14661 | |||||||
14662 | IdentifierInfo *Name = FD->getIdentifier(); | ||||||
14663 | if (!Name) | ||||||
14664 | return; | ||||||
14665 | if ((!getLangOpts().CPlusPlus && | ||||||
14666 | FD->getDeclContext()->isTranslationUnit()) || | ||||||
14667 | (isa<LinkageSpecDecl>(FD->getDeclContext()) && | ||||||
14668 | cast<LinkageSpecDecl>(FD->getDeclContext())->getLanguage() == | ||||||
14669 | LinkageSpecDecl::lang_c)) { | ||||||
14670 | // Okay: this could be a libc/libm/Objective-C function we know | ||||||
14671 | // about. | ||||||
14672 | } else | ||||||
14673 | return; | ||||||
14674 | |||||||
14675 | if (Name->isStr("asprintf") || Name->isStr("vasprintf")) { | ||||||
14676 | // FIXME: asprintf and vasprintf aren't C99 functions. Should they be | ||||||
14677 | // target-specific builtins, perhaps? | ||||||
14678 | if (!FD->hasAttr<FormatAttr>()) | ||||||
14679 | FD->addAttr(FormatAttr::CreateImplicit(Context, | ||||||
14680 | &Context.Idents.get("printf"), 2, | ||||||
14681 | Name->isStr("vasprintf") ? 0 : 3, | ||||||
14682 | FD->getLocation())); | ||||||
14683 | } | ||||||
14684 | |||||||
14685 | if (Name->isStr("__CFStringMakeConstantString")) { | ||||||
14686 | // We already have a __builtin___CFStringMakeConstantString, | ||||||
14687 | // but builds that use -fno-constant-cfstrings don't go through that. | ||||||
14688 | if (!FD->hasAttr<FormatArgAttr>()) | ||||||
14689 | FD->addAttr(FormatArgAttr::CreateImplicit(Context, ParamIdx(1, FD), | ||||||
14690 | FD->getLocation())); | ||||||
14691 | } | ||||||
14692 | } | ||||||
14693 | |||||||
14694 | TypedefDecl *Sema::ParseTypedefDecl(Scope *S, Declarator &D, QualType T, | ||||||
14695 | TypeSourceInfo *TInfo) { | ||||||
14696 | assert(D.getIdentifier() && "Wrong callback for declspec without declarator")((D.getIdentifier() && "Wrong callback for declspec without declarator" ) ? static_cast<void> (0) : __assert_fail ("D.getIdentifier() && \"Wrong callback for declspec without declarator\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 14696, __PRETTY_FUNCTION__)); | ||||||
14697 | assert(!T.isNull() && "GetTypeForDeclarator() returned null type")((!T.isNull() && "GetTypeForDeclarator() returned null type" ) ? static_cast<void> (0) : __assert_fail ("!T.isNull() && \"GetTypeForDeclarator() returned null type\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 14697, __PRETTY_FUNCTION__)); | ||||||
14698 | |||||||
14699 | if (!TInfo) { | ||||||
14700 | assert(D.isInvalidType() && "no declarator info for valid type")((D.isInvalidType() && "no declarator info for valid type" ) ? static_cast<void> (0) : __assert_fail ("D.isInvalidType() && \"no declarator info for valid type\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 14700, __PRETTY_FUNCTION__)); | ||||||
14701 | TInfo = Context.getTrivialTypeSourceInfo(T); | ||||||
14702 | } | ||||||
14703 | |||||||
14704 | // Scope manipulation handled by caller. | ||||||
14705 | TypedefDecl *NewTD = | ||||||
14706 | TypedefDecl::Create(Context, CurContext, D.getBeginLoc(), | ||||||
14707 | D.getIdentifierLoc(), D.getIdentifier(), TInfo); | ||||||
14708 | |||||||
14709 | // Bail out immediately if we have an invalid declaration. | ||||||
14710 | if (D.isInvalidType()) { | ||||||
14711 | NewTD->setInvalidDecl(); | ||||||
14712 | return NewTD; | ||||||
14713 | } | ||||||
14714 | |||||||
14715 | if (D.getDeclSpec().isModulePrivateSpecified()) { | ||||||
14716 | if (CurContext->isFunctionOrMethod()) | ||||||
14717 | Diag(NewTD->getLocation(), diag::err_module_private_local) | ||||||
14718 | << 2 << NewTD->getDeclName() | ||||||
14719 | << SourceRange(D.getDeclSpec().getModulePrivateSpecLoc()) | ||||||
14720 | << FixItHint::CreateRemoval(D.getDeclSpec().getModulePrivateSpecLoc()); | ||||||
14721 | else | ||||||
14722 | NewTD->setModulePrivate(); | ||||||
14723 | } | ||||||
14724 | |||||||
14725 | // C++ [dcl.typedef]p8: | ||||||
14726 | // If the typedef declaration defines an unnamed class (or | ||||||
14727 | // enum), the first typedef-name declared by the declaration | ||||||
14728 | // to be that class type (or enum type) is used to denote the | ||||||
14729 | // class type (or enum type) for linkage purposes only. | ||||||
14730 | // We need to check whether the type was declared in the declaration. | ||||||
14731 | switch (D.getDeclSpec().getTypeSpecType()) { | ||||||
14732 | case TST_enum: | ||||||
14733 | case TST_struct: | ||||||
14734 | case TST_interface: | ||||||
14735 | case TST_union: | ||||||
14736 | case TST_class: { | ||||||
14737 | TagDecl *tagFromDeclSpec = cast<TagDecl>(D.getDeclSpec().getRepAsDecl()); | ||||||
14738 | setTagNameForLinkagePurposes(tagFromDeclSpec, NewTD); | ||||||
14739 | break; | ||||||
14740 | } | ||||||
14741 | |||||||
14742 | default: | ||||||
14743 | break; | ||||||
14744 | } | ||||||
14745 | |||||||
14746 | return NewTD; | ||||||
14747 | } | ||||||
14748 | |||||||
14749 | /// Check that this is a valid underlying type for an enum declaration. | ||||||
14750 | bool Sema::CheckEnumUnderlyingType(TypeSourceInfo *TI) { | ||||||
14751 | SourceLocation UnderlyingLoc = TI->getTypeLoc().getBeginLoc(); | ||||||
14752 | QualType T = TI->getType(); | ||||||
14753 | |||||||
14754 | if (T->isDependentType()) | ||||||
14755 | return false; | ||||||
14756 | |||||||
14757 | if (const BuiltinType *BT = T->getAs<BuiltinType>()) | ||||||
14758 | if (BT->isInteger()) | ||||||
14759 | return false; | ||||||
14760 | |||||||
14761 | Diag(UnderlyingLoc, diag::err_enum_invalid_underlying) << T; | ||||||
14762 | return true; | ||||||
14763 | } | ||||||
14764 | |||||||
14765 | /// Check whether this is a valid redeclaration of a previous enumeration. | ||||||
14766 | /// \return true if the redeclaration was invalid. | ||||||
14767 | bool Sema::CheckEnumRedeclaration(SourceLocation EnumLoc, bool IsScoped, | ||||||
14768 | QualType EnumUnderlyingTy, bool IsFixed, | ||||||
14769 | const EnumDecl *Prev) { | ||||||
14770 | if (IsScoped != Prev->isScoped()) { | ||||||
14771 | Diag(EnumLoc, diag::err_enum_redeclare_scoped_mismatch) | ||||||
14772 | << Prev->isScoped(); | ||||||
14773 | Diag(Prev->getLocation(), diag::note_previous_declaration); | ||||||
14774 | return true; | ||||||
14775 | } | ||||||
14776 | |||||||
14777 | if (IsFixed && Prev->isFixed()) { | ||||||
14778 | if (!EnumUnderlyingTy->isDependentType() && | ||||||
14779 | !Prev->getIntegerType()->isDependentType() && | ||||||
14780 | !Context.hasSameUnqualifiedType(EnumUnderlyingTy, | ||||||
14781 | Prev->getIntegerType())) { | ||||||
14782 | // TODO: Highlight the underlying type of the redeclaration. | ||||||
14783 | Diag(EnumLoc, diag::err_enum_redeclare_type_mismatch) | ||||||
14784 | << EnumUnderlyingTy << Prev->getIntegerType(); | ||||||
14785 | Diag(Prev->getLocation(), diag::note_previous_declaration) | ||||||
14786 | << Prev->getIntegerTypeRange(); | ||||||
14787 | return true; | ||||||
14788 | } | ||||||
14789 | } else if (IsFixed != Prev->isFixed()) { | ||||||
14790 | Diag(EnumLoc, diag::err_enum_redeclare_fixed_mismatch) | ||||||
14791 | << Prev->isFixed(); | ||||||
14792 | Diag(Prev->getLocation(), diag::note_previous_declaration); | ||||||
14793 | return true; | ||||||
14794 | } | ||||||
14795 | |||||||
14796 | return false; | ||||||
14797 | } | ||||||
14798 | |||||||
14799 | /// Get diagnostic %select index for tag kind for | ||||||
14800 | /// redeclaration diagnostic message. | ||||||
14801 | /// WARNING: Indexes apply to particular diagnostics only! | ||||||
14802 | /// | ||||||
14803 | /// \returns diagnostic %select index. | ||||||
14804 | static unsigned getRedeclDiagFromTagKind(TagTypeKind Tag) { | ||||||
14805 | switch (Tag) { | ||||||
14806 | case TTK_Struct: return 0; | ||||||
14807 | case TTK_Interface: return 1; | ||||||
14808 | case TTK_Class: return 2; | ||||||
14809 | default: llvm_unreachable("Invalid tag kind for redecl diagnostic!")::llvm::llvm_unreachable_internal("Invalid tag kind for redecl diagnostic!" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 14809); | ||||||
14810 | } | ||||||
14811 | } | ||||||
14812 | |||||||
14813 | /// Determine if tag kind is a class-key compatible with | ||||||
14814 | /// class for redeclaration (class, struct, or __interface). | ||||||
14815 | /// | ||||||
14816 | /// \returns true iff the tag kind is compatible. | ||||||
14817 | static bool isClassCompatTagKind(TagTypeKind Tag) | ||||||
14818 | { | ||||||
14819 | return Tag == TTK_Struct || Tag == TTK_Class || Tag == TTK_Interface; | ||||||
14820 | } | ||||||
14821 | |||||||
14822 | Sema::NonTagKind Sema::getNonTagTypeDeclKind(const Decl *PrevDecl, | ||||||
14823 | TagTypeKind TTK) { | ||||||
14824 | if (isa<TypedefDecl>(PrevDecl)) | ||||||
14825 | return NTK_Typedef; | ||||||
14826 | else if (isa<TypeAliasDecl>(PrevDecl)) | ||||||
14827 | return NTK_TypeAlias; | ||||||
14828 | else if (isa<ClassTemplateDecl>(PrevDecl)) | ||||||
14829 | return NTK_Template; | ||||||
14830 | else if (isa<TypeAliasTemplateDecl>(PrevDecl)) | ||||||
14831 | return NTK_TypeAliasTemplate; | ||||||
14832 | else if (isa<TemplateTemplateParmDecl>(PrevDecl)) | ||||||
14833 | return NTK_TemplateTemplateArgument; | ||||||
14834 | switch (TTK) { | ||||||
14835 | case TTK_Struct: | ||||||
14836 | case TTK_Interface: | ||||||
14837 | case TTK_Class: | ||||||
14838 | return getLangOpts().CPlusPlus ? NTK_NonClass : NTK_NonStruct; | ||||||
14839 | case TTK_Union: | ||||||
14840 | return NTK_NonUnion; | ||||||
14841 | case TTK_Enum: | ||||||
14842 | return NTK_NonEnum; | ||||||
14843 | } | ||||||
14844 | llvm_unreachable("invalid TTK")::llvm::llvm_unreachable_internal("invalid TTK", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 14844); | ||||||
14845 | } | ||||||
14846 | |||||||
14847 | /// Determine whether a tag with a given kind is acceptable | ||||||
14848 | /// as a redeclaration of the given tag declaration. | ||||||
14849 | /// | ||||||
14850 | /// \returns true if the new tag kind is acceptable, false otherwise. | ||||||
14851 | bool Sema::isAcceptableTagRedeclaration(const TagDecl *Previous, | ||||||
14852 | TagTypeKind NewTag, bool isDefinition, | ||||||
14853 | SourceLocation NewTagLoc, | ||||||
14854 | const IdentifierInfo *Name) { | ||||||
14855 | // C++ [dcl.type.elab]p3: | ||||||
14856 | // The class-key or enum keyword present in the | ||||||
14857 | // elaborated-type-specifier shall agree in kind with the | ||||||
14858 | // declaration to which the name in the elaborated-type-specifier | ||||||
14859 | // refers. This rule also applies to the form of | ||||||
14860 | // elaborated-type-specifier that declares a class-name or | ||||||
14861 | // friend class since it can be construed as referring to the | ||||||
14862 | // definition of the class. Thus, in any | ||||||
14863 | // elaborated-type-specifier, the enum keyword shall be used to | ||||||
14864 | // refer to an enumeration (7.2), the union class-key shall be | ||||||
14865 | // used to refer to a union (clause 9), and either the class or | ||||||
14866 | // struct class-key shall be used to refer to a class (clause 9) | ||||||
14867 | // declared using the class or struct class-key. | ||||||
14868 | TagTypeKind OldTag = Previous->getTagKind(); | ||||||
14869 | if (OldTag != NewTag && | ||||||
14870 | !(isClassCompatTagKind(OldTag) && isClassCompatTagKind(NewTag))) | ||||||
14871 | return false; | ||||||
14872 | |||||||
14873 | // Tags are compatible, but we might still want to warn on mismatched tags. | ||||||
14874 | // Non-class tags can't be mismatched at this point. | ||||||
14875 | if (!isClassCompatTagKind(NewTag)) | ||||||
14876 | return true; | ||||||
14877 | |||||||
14878 | // Declarations for which -Wmismatched-tags is disabled are entirely ignored | ||||||
14879 | // by our warning analysis. We don't want to warn about mismatches with (eg) | ||||||
14880 | // declarations in system headers that are designed to be specialized, but if | ||||||
14881 | // a user asks us to warn, we should warn if their code contains mismatched | ||||||
14882 | // declarations. | ||||||
14883 | auto IsIgnoredLoc = [&](SourceLocation Loc) { | ||||||
14884 | return getDiagnostics().isIgnored(diag::warn_struct_class_tag_mismatch, | ||||||
14885 | Loc); | ||||||
14886 | }; | ||||||
14887 | if (IsIgnoredLoc(NewTagLoc)) | ||||||
14888 | return true; | ||||||
14889 | |||||||
14890 | auto IsIgnored = [&](const TagDecl *Tag) { | ||||||
14891 | return IsIgnoredLoc(Tag->getLocation()); | ||||||
14892 | }; | ||||||
14893 | while (IsIgnored(Previous)) { | ||||||
14894 | Previous = Previous->getPreviousDecl(); | ||||||
14895 | if (!Previous) | ||||||
14896 | return true; | ||||||
14897 | OldTag = Previous->getTagKind(); | ||||||
14898 | } | ||||||
14899 | |||||||
14900 | bool isTemplate = false; | ||||||
14901 | if (const CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(Previous)) | ||||||
14902 | isTemplate = Record->getDescribedClassTemplate(); | ||||||
14903 | |||||||
14904 | if (inTemplateInstantiation()) { | ||||||
14905 | if (OldTag != NewTag) { | ||||||
14906 | // In a template instantiation, do not offer fix-its for tag mismatches | ||||||
14907 | // since they usually mess up the template instead of fixing the problem. | ||||||
14908 | Diag(NewTagLoc, diag::warn_struct_class_tag_mismatch) | ||||||
14909 | << getRedeclDiagFromTagKind(NewTag) << isTemplate << Name | ||||||
14910 | << getRedeclDiagFromTagKind(OldTag); | ||||||
14911 | // FIXME: Note previous location? | ||||||
14912 | } | ||||||
14913 | return true; | ||||||
14914 | } | ||||||
14915 | |||||||
14916 | if (isDefinition) { | ||||||
14917 | // On definitions, check all previous tags and issue a fix-it for each | ||||||
14918 | // one that doesn't match the current tag. | ||||||
14919 | if (Previous->getDefinition()) { | ||||||
14920 | // Don't suggest fix-its for redefinitions. | ||||||
14921 | return true; | ||||||
14922 | } | ||||||
14923 | |||||||
14924 | bool previousMismatch = false; | ||||||
14925 | for (const TagDecl *I : Previous->redecls()) { | ||||||
14926 | if (I->getTagKind() != NewTag) { | ||||||
14927 | // Ignore previous declarations for which the warning was disabled. | ||||||
14928 | if (IsIgnored(I)) | ||||||
14929 | continue; | ||||||
14930 | |||||||
14931 | if (!previousMismatch) { | ||||||
14932 | previousMismatch = true; | ||||||
14933 | Diag(NewTagLoc, diag::warn_struct_class_previous_tag_mismatch) | ||||||
14934 | << getRedeclDiagFromTagKind(NewTag) << isTemplate << Name | ||||||
14935 | << getRedeclDiagFromTagKind(I->getTagKind()); | ||||||
14936 | } | ||||||
14937 | Diag(I->getInnerLocStart(), diag::note_struct_class_suggestion) | ||||||
14938 | << getRedeclDiagFromTagKind(NewTag) | ||||||
14939 | << FixItHint::CreateReplacement(I->getInnerLocStart(), | ||||||
14940 | TypeWithKeyword::getTagTypeKindName(NewTag)); | ||||||
14941 | } | ||||||
14942 | } | ||||||
14943 | return true; | ||||||
14944 | } | ||||||
14945 | |||||||
14946 | // Identify the prevailing tag kind: this is the kind of the definition (if | ||||||
14947 | // there is a non-ignored definition), or otherwise the kind of the prior | ||||||
14948 | // (non-ignored) declaration. | ||||||
14949 | const TagDecl *PrevDef = Previous->getDefinition(); | ||||||
14950 | if (PrevDef && IsIgnored(PrevDef)) | ||||||
14951 | PrevDef = nullptr; | ||||||
14952 | const TagDecl *Redecl = PrevDef ? PrevDef : Previous; | ||||||
14953 | if (Redecl->getTagKind() != NewTag) { | ||||||
14954 | Diag(NewTagLoc, diag::warn_struct_class_tag_mismatch) | ||||||
14955 | << getRedeclDiagFromTagKind(NewTag) << isTemplate << Name | ||||||
14956 | << getRedeclDiagFromTagKind(OldTag); | ||||||
14957 | Diag(Redecl->getLocation(), diag::note_previous_use); | ||||||
14958 | |||||||
14959 | // If there is a previous definition, suggest a fix-it. | ||||||
14960 | if (PrevDef) { | ||||||
14961 | Diag(NewTagLoc, diag::note_struct_class_suggestion) | ||||||
14962 | << getRedeclDiagFromTagKind(Redecl->getTagKind()) | ||||||
14963 | << FixItHint::CreateReplacement(SourceRange(NewTagLoc), | ||||||
14964 | TypeWithKeyword::getTagTypeKindName(Redecl->getTagKind())); | ||||||
14965 | } | ||||||
14966 | } | ||||||
14967 | |||||||
14968 | return true; | ||||||
14969 | } | ||||||
14970 | |||||||
14971 | /// Add a minimal nested name specifier fixit hint to allow lookup of a tag name | ||||||
14972 | /// from an outer enclosing namespace or file scope inside a friend declaration. | ||||||
14973 | /// This should provide the commented out code in the following snippet: | ||||||
14974 | /// namespace N { | ||||||
14975 | /// struct X; | ||||||
14976 | /// namespace M { | ||||||
14977 | /// struct Y { friend struct /*N::*/ X; }; | ||||||
14978 | /// } | ||||||
14979 | /// } | ||||||
14980 | static FixItHint createFriendTagNNSFixIt(Sema &SemaRef, NamedDecl *ND, Scope *S, | ||||||
14981 | SourceLocation NameLoc) { | ||||||
14982 | // While the decl is in a namespace, do repeated lookup of that name and see | ||||||
14983 | // if we get the same namespace back. If we do not, continue until | ||||||
14984 | // translation unit scope, at which point we have a fully qualified NNS. | ||||||
14985 | SmallVector<IdentifierInfo *, 4> Namespaces; | ||||||
14986 | DeclContext *DC = ND->getDeclContext()->getRedeclContext(); | ||||||
14987 | for (; !DC->isTranslationUnit(); DC = DC->getParent()) { | ||||||
14988 | // This tag should be declared in a namespace, which can only be enclosed by | ||||||
14989 | // other namespaces. Bail if there's an anonymous namespace in the chain. | ||||||
14990 | NamespaceDecl *Namespace = dyn_cast<NamespaceDecl>(DC); | ||||||
14991 | if (!Namespace || Namespace->isAnonymousNamespace()) | ||||||
14992 | return FixItHint(); | ||||||
14993 | IdentifierInfo *II = Namespace->getIdentifier(); | ||||||
14994 | Namespaces.push_back(II); | ||||||
14995 | NamedDecl *Lookup = SemaRef.LookupSingleName( | ||||||
14996 | S, II, NameLoc, Sema::LookupNestedNameSpecifierName); | ||||||
14997 | if (Lookup == Namespace) | ||||||
14998 | break; | ||||||
14999 | } | ||||||
15000 | |||||||
15001 | // Once we have all the namespaces, reverse them to go outermost first, and | ||||||
15002 | // build an NNS. | ||||||
15003 | SmallString<64> Insertion; | ||||||
15004 | llvm::raw_svector_ostream OS(Insertion); | ||||||
15005 | if (DC->isTranslationUnit()) | ||||||
15006 | OS << "::"; | ||||||
15007 | std::reverse(Namespaces.begin(), Namespaces.end()); | ||||||
15008 | for (auto *II : Namespaces) | ||||||
15009 | OS << II->getName() << "::"; | ||||||
15010 | return FixItHint::CreateInsertion(NameLoc, Insertion); | ||||||
15011 | } | ||||||
15012 | |||||||
15013 | /// Determine whether a tag originally declared in context \p OldDC can | ||||||
15014 | /// be redeclared with an unqualified name in \p NewDC (assuming name lookup | ||||||
15015 | /// found a declaration in \p OldDC as a previous decl, perhaps through a | ||||||
15016 | /// using-declaration). | ||||||
15017 | static bool isAcceptableTagRedeclContext(Sema &S, DeclContext *OldDC, | ||||||
15018 | DeclContext *NewDC) { | ||||||
15019 | OldDC = OldDC->getRedeclContext(); | ||||||
15020 | NewDC = NewDC->getRedeclContext(); | ||||||
15021 | |||||||
15022 | if (OldDC->Equals(NewDC)) | ||||||
15023 | return true; | ||||||
15024 | |||||||
15025 | // In MSVC mode, we allow a redeclaration if the contexts are related (either | ||||||
15026 | // encloses the other). | ||||||
15027 | if (S.getLangOpts().MSVCCompat && | ||||||
15028 | (OldDC->Encloses(NewDC) || NewDC->Encloses(OldDC))) | ||||||
15029 | return true; | ||||||
15030 | |||||||
15031 | return false; | ||||||
15032 | } | ||||||
15033 | |||||||
15034 | /// This is invoked when we see 'struct foo' or 'struct {'. In the | ||||||
15035 | /// former case, Name will be non-null. In the later case, Name will be null. | ||||||
15036 | /// TagSpec indicates what kind of tag this is. TUK indicates whether this is a | ||||||
15037 | /// reference/declaration/definition of a tag. | ||||||
15038 | /// | ||||||
15039 | /// \param IsTypeSpecifier \c true if this is a type-specifier (or | ||||||
15040 | /// trailing-type-specifier) other than one in an alias-declaration. | ||||||
15041 | /// | ||||||
15042 | /// \param SkipBody If non-null, will be set to indicate if the caller should | ||||||
15043 | /// skip the definition of this tag and treat it as if it were a declaration. | ||||||
15044 | Decl *Sema::ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, | ||||||
15045 | SourceLocation KWLoc, CXXScopeSpec &SS, | ||||||
15046 | IdentifierInfo *Name, SourceLocation NameLoc, | ||||||
15047 | const ParsedAttributesView &Attrs, AccessSpecifier AS, | ||||||
15048 | SourceLocation ModulePrivateLoc, | ||||||
15049 | MultiTemplateParamsArg TemplateParameterLists, | ||||||
15050 | bool &OwnedDecl, bool &IsDependent, | ||||||
15051 | SourceLocation ScopedEnumKWLoc, | ||||||
15052 | bool ScopedEnumUsesClassTag, TypeResult UnderlyingType, | ||||||
15053 | bool IsTypeSpecifier, bool IsTemplateParamOrArg, | ||||||
15054 | SkipBodyInfo *SkipBody) { | ||||||
15055 | // If this is not a definition, it must have a name. | ||||||
15056 | IdentifierInfo *OrigName = Name; | ||||||
15057 | assert((Name != nullptr || TUK == TUK_Definition) &&(((Name != nullptr || TUK == TUK_Definition) && "Nameless record must be a definition!" ) ? static_cast<void> (0) : __assert_fail ("(Name != nullptr || TUK == TUK_Definition) && \"Nameless record must be a definition!\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 15058, __PRETTY_FUNCTION__)) | ||||||
15058 | "Nameless record must be a definition!")(((Name != nullptr || TUK == TUK_Definition) && "Nameless record must be a definition!" ) ? static_cast<void> (0) : __assert_fail ("(Name != nullptr || TUK == TUK_Definition) && \"Nameless record must be a definition!\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 15058, __PRETTY_FUNCTION__)); | ||||||
15059 | assert(TemplateParameterLists.size() == 0 || TUK != TUK_Reference)((TemplateParameterLists.size() == 0 || TUK != TUK_Reference) ? static_cast<void> (0) : __assert_fail ("TemplateParameterLists.size() == 0 || TUK != TUK_Reference" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 15059, __PRETTY_FUNCTION__)); | ||||||
15060 | |||||||
15061 | OwnedDecl = false; | ||||||
15062 | TagTypeKind Kind = TypeWithKeyword::getTagTypeKindForTypeSpec(TagSpec); | ||||||
15063 | bool ScopedEnum = ScopedEnumKWLoc.isValid(); | ||||||
15064 | |||||||
15065 | // FIXME: Check member specializations more carefully. | ||||||
15066 | bool isMemberSpecialization = false; | ||||||
15067 | bool Invalid = false; | ||||||
15068 | |||||||
15069 | // We only need to do this matching if we have template parameters | ||||||
15070 | // or a scope specifier, which also conveniently avoids this work | ||||||
15071 | // for non-C++ cases. | ||||||
15072 | if (TemplateParameterLists.size() > 0 || | ||||||
15073 | (SS.isNotEmpty() && TUK != TUK_Reference)) { | ||||||
15074 | if (TemplateParameterList *TemplateParams = | ||||||
15075 | MatchTemplateParametersToScopeSpecifier( | ||||||
15076 | KWLoc, NameLoc, SS, nullptr, TemplateParameterLists, | ||||||
15077 | TUK == TUK_Friend, isMemberSpecialization, Invalid)) { | ||||||
15078 | if (Kind == TTK_Enum) { | ||||||
15079 | Diag(KWLoc, diag::err_enum_template); | ||||||
15080 | return nullptr; | ||||||
15081 | } | ||||||
15082 | |||||||
15083 | if (TemplateParams->size() > 0) { | ||||||
15084 | // This is a declaration or definition of a class template (which may | ||||||
15085 | // be a member of another template). | ||||||
15086 | |||||||
15087 | if (Invalid) | ||||||
15088 | return nullptr; | ||||||
15089 | |||||||
15090 | OwnedDecl = false; | ||||||
15091 | DeclResult Result = CheckClassTemplate( | ||||||
15092 | S, TagSpec, TUK, KWLoc, SS, Name, NameLoc, Attrs, TemplateParams, | ||||||
15093 | AS, ModulePrivateLoc, | ||||||
15094 | /*FriendLoc*/ SourceLocation(), TemplateParameterLists.size() - 1, | ||||||
15095 | TemplateParameterLists.data(), SkipBody); | ||||||
15096 | return Result.get(); | ||||||
15097 | } else { | ||||||
15098 | // The "template<>" header is extraneous. | ||||||
15099 | Diag(TemplateParams->getTemplateLoc(), diag::err_template_tag_noparams) | ||||||
15100 | << TypeWithKeyword::getTagTypeKindName(Kind) << Name; | ||||||
15101 | isMemberSpecialization = true; | ||||||
15102 | } | ||||||
15103 | } | ||||||
15104 | } | ||||||
15105 | |||||||
15106 | // Figure out the underlying type if this a enum declaration. We need to do | ||||||
15107 | // this early, because it's needed to detect if this is an incompatible | ||||||
15108 | // redeclaration. | ||||||
15109 | llvm::PointerUnion<const Type*, TypeSourceInfo*> EnumUnderlying; | ||||||
15110 | bool IsFixed = !UnderlyingType.isUnset() || ScopedEnum; | ||||||
15111 | |||||||
15112 | if (Kind == TTK_Enum) { | ||||||
15113 | if (UnderlyingType.isInvalid() || (!UnderlyingType.get() && ScopedEnum)) { | ||||||
15114 | // No underlying type explicitly specified, or we failed to parse the | ||||||
15115 | // type, default to int. | ||||||
15116 | EnumUnderlying = Context.IntTy.getTypePtr(); | ||||||
15117 | } else if (UnderlyingType.get()) { | ||||||
15118 | // C++0x 7.2p2: The type-specifier-seq of an enum-base shall name an | ||||||
15119 | // integral type; any cv-qualification is ignored. | ||||||
15120 | TypeSourceInfo *TI = nullptr; | ||||||
15121 | GetTypeFromParser(UnderlyingType.get(), &TI); | ||||||
15122 | EnumUnderlying = TI; | ||||||
15123 | |||||||
15124 | if (CheckEnumUnderlyingType(TI)) | ||||||
15125 | // Recover by falling back to int. | ||||||
15126 | EnumUnderlying = Context.IntTy.getTypePtr(); | ||||||
15127 | |||||||
15128 | if (DiagnoseUnexpandedParameterPack(TI->getTypeLoc().getBeginLoc(), TI, | ||||||
15129 | UPPC_FixedUnderlyingType)) | ||||||
15130 | EnumUnderlying = Context.IntTy.getTypePtr(); | ||||||
15131 | |||||||
15132 | } else if (Context.getTargetInfo().getTriple().isWindowsMSVCEnvironment()) { | ||||||
15133 | // For MSVC ABI compatibility, unfixed enums must use an underlying type | ||||||
15134 | // of 'int'. However, if this is an unfixed forward declaration, don't set | ||||||
15135 | // the underlying type unless the user enables -fms-compatibility. This | ||||||
15136 | // makes unfixed forward declared enums incomplete and is more conforming. | ||||||
15137 | if (TUK == TUK_Definition || getLangOpts().MSVCCompat) | ||||||
15138 | EnumUnderlying = Context.IntTy.getTypePtr(); | ||||||
15139 | } | ||||||
15140 | } | ||||||
15141 | |||||||
15142 | DeclContext *SearchDC = CurContext; | ||||||
15143 | DeclContext *DC = CurContext; | ||||||
15144 | bool isStdBadAlloc = false; | ||||||
15145 | bool isStdAlignValT = false; | ||||||
15146 | |||||||
15147 | RedeclarationKind Redecl = forRedeclarationInCurContext(); | ||||||
15148 | if (TUK == TUK_Friend || TUK == TUK_Reference) | ||||||
15149 | Redecl = NotForRedeclaration; | ||||||
15150 | |||||||
15151 | /// Create a new tag decl in C/ObjC. Since the ODR-like semantics for ObjC/C | ||||||
15152 | /// implemented asks for structural equivalence checking, the returned decl | ||||||
15153 | /// here is passed back to the parser, allowing the tag body to be parsed. | ||||||
15154 | auto createTagFromNewDecl = [&]() -> TagDecl * { | ||||||
15155 | assert(!getLangOpts().CPlusPlus && "not meant for C++ usage")((!getLangOpts().CPlusPlus && "not meant for C++ usage" ) ? static_cast<void> (0) : __assert_fail ("!getLangOpts().CPlusPlus && \"not meant for C++ usage\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 15155, __PRETTY_FUNCTION__)); | ||||||
15156 | // If there is an identifier, use the location of the identifier as the | ||||||
15157 | // location of the decl, otherwise use the location of the struct/union | ||||||
15158 | // keyword. | ||||||
15159 | SourceLocation Loc = NameLoc.isValid() ? NameLoc : KWLoc; | ||||||
15160 | TagDecl *New = nullptr; | ||||||
15161 | |||||||
15162 | if (Kind == TTK_Enum) { | ||||||
15163 | New = EnumDecl::Create(Context, SearchDC, KWLoc, Loc, Name, nullptr, | ||||||
15164 | ScopedEnum, ScopedEnumUsesClassTag, IsFixed); | ||||||
15165 | // If this is an undefined enum, bail. | ||||||
15166 | if (TUK != TUK_Definition && !Invalid) | ||||||
15167 | return nullptr; | ||||||
15168 | if (EnumUnderlying) { | ||||||
15169 | EnumDecl *ED = cast<EnumDecl>(New); | ||||||
15170 | if (TypeSourceInfo *TI = EnumUnderlying.dyn_cast<TypeSourceInfo *>()) | ||||||
15171 | ED->setIntegerTypeSourceInfo(TI); | ||||||
15172 | else | ||||||
15173 | ED->setIntegerType(QualType(EnumUnderlying.get<const Type *>(), 0)); | ||||||
15174 | ED->setPromotionType(ED->getIntegerType()); | ||||||
15175 | } | ||||||
15176 | } else { // struct/union | ||||||
15177 | New = RecordDecl::Create(Context, Kind, SearchDC, KWLoc, Loc, Name, | ||||||
15178 | nullptr); | ||||||
15179 | } | ||||||
15180 | |||||||
15181 | if (RecordDecl *RD = dyn_cast<RecordDecl>(New)) { | ||||||
15182 | // Add alignment attributes if necessary; these attributes are checked | ||||||
15183 | // when the ASTContext lays out the structure. | ||||||
15184 | // | ||||||
15185 | // It is important for implementing the correct semantics that this | ||||||
15186 | // happen here (in ActOnTag). The #pragma pack stack is | ||||||
15187 | // maintained as a result of parser callbacks which can occur at | ||||||
15188 | // many points during the parsing of a struct declaration (because | ||||||
15189 | // the #pragma tokens are effectively skipped over during the | ||||||
15190 | // parsing of the struct). | ||||||
15191 | if (TUK == TUK_Definition && (!SkipBody || !SkipBody->ShouldSkip)) { | ||||||
15192 | AddAlignmentAttributesForRecord(RD); | ||||||
15193 | AddMsStructLayoutForRecord(RD); | ||||||
15194 | } | ||||||
15195 | } | ||||||
15196 | New->setLexicalDeclContext(CurContext); | ||||||
15197 | return New; | ||||||
15198 | }; | ||||||
15199 | |||||||
15200 | LookupResult Previous(*this, Name, NameLoc, LookupTagName, Redecl); | ||||||
15201 | if (Name && SS.isNotEmpty()) { | ||||||
15202 | // We have a nested-name tag ('struct foo::bar'). | ||||||
15203 | |||||||
15204 | // Check for invalid 'foo::'. | ||||||
15205 | if (SS.isInvalid()) { | ||||||
15206 | Name = nullptr; | ||||||
15207 | goto CreateNewDecl; | ||||||
15208 | } | ||||||
15209 | |||||||
15210 | // If this is a friend or a reference to a class in a dependent | ||||||
15211 | // context, don't try to make a decl for it. | ||||||
15212 | if (TUK == TUK_Friend || TUK == TUK_Reference) { | ||||||
15213 | DC = computeDeclContext(SS, false); | ||||||
15214 | if (!DC) { | ||||||
15215 | IsDependent = true; | ||||||
15216 | return nullptr; | ||||||
15217 | } | ||||||
15218 | } else { | ||||||
15219 | DC = computeDeclContext(SS, true); | ||||||
15220 | if (!DC) { | ||||||
15221 | Diag(SS.getRange().getBegin(), diag::err_dependent_nested_name_spec) | ||||||
15222 | << SS.getRange(); | ||||||
15223 | return nullptr; | ||||||
15224 | } | ||||||
15225 | } | ||||||
15226 | |||||||
15227 | if (RequireCompleteDeclContext(SS, DC)) | ||||||
15228 | return nullptr; | ||||||
15229 | |||||||
15230 | SearchDC = DC; | ||||||
15231 | // Look-up name inside 'foo::'. | ||||||
15232 | LookupQualifiedName(Previous, DC); | ||||||
15233 | |||||||
15234 | if (Previous.isAmbiguous()) | ||||||
15235 | return nullptr; | ||||||
15236 | |||||||
15237 | if (Previous.empty()) { | ||||||
15238 | // Name lookup did not find anything. However, if the | ||||||
15239 | // nested-name-specifier refers to the current instantiation, | ||||||
15240 | // and that current instantiation has any dependent base | ||||||
15241 | // classes, we might find something at instantiation time: treat | ||||||
15242 | // this as a dependent elaborated-type-specifier. | ||||||
15243 | // But this only makes any sense for reference-like lookups. | ||||||
15244 | if (Previous.wasNotFoundInCurrentInstantiation() && | ||||||
15245 | (TUK == TUK_Reference || TUK == TUK_Friend)) { | ||||||
15246 | IsDependent = true; | ||||||
15247 | return nullptr; | ||||||
15248 | } | ||||||
15249 | |||||||
15250 | // A tag 'foo::bar' must already exist. | ||||||
15251 | Diag(NameLoc, diag::err_not_tag_in_scope) | ||||||
15252 | << Kind << Name << DC << SS.getRange(); | ||||||
15253 | Name = nullptr; | ||||||
15254 | Invalid = true; | ||||||
15255 | goto CreateNewDecl; | ||||||
15256 | } | ||||||
15257 | } else if (Name) { | ||||||
15258 | // C++14 [class.mem]p14: | ||||||
15259 | // If T is the name of a class, then each of the following shall have a | ||||||
15260 | // name different from T: | ||||||
15261 | // -- every member of class T that is itself a type | ||||||
15262 | if (TUK != TUK_Reference && TUK != TUK_Friend && | ||||||
15263 | DiagnoseClassNameShadow(SearchDC, DeclarationNameInfo(Name, NameLoc))) | ||||||
15264 | return nullptr; | ||||||
15265 | |||||||
15266 | // If this is a named struct, check to see if there was a previous forward | ||||||
15267 | // declaration or definition. | ||||||
15268 | // FIXME: We're looking into outer scopes here, even when we | ||||||
15269 | // shouldn't be. Doing so can result in ambiguities that we | ||||||
15270 | // shouldn't be diagnosing. | ||||||
15271 | LookupName(Previous, S); | ||||||
15272 | |||||||
15273 | // When declaring or defining a tag, ignore ambiguities introduced | ||||||
15274 | // by types using'ed into this scope. | ||||||
15275 | if (Previous.isAmbiguous() && | ||||||
15276 | (TUK == TUK_Definition || TUK == TUK_Declaration)) { | ||||||
15277 | LookupResult::Filter F = Previous.makeFilter(); | ||||||
15278 | while (F.hasNext()) { | ||||||
15279 | NamedDecl *ND = F.next(); | ||||||
15280 | if (!ND->getDeclContext()->getRedeclContext()->Equals( | ||||||
15281 | SearchDC->getRedeclContext())) | ||||||
15282 | F.erase(); | ||||||
15283 | } | ||||||
15284 | F.done(); | ||||||
15285 | } | ||||||
15286 | |||||||
15287 | // C++11 [namespace.memdef]p3: | ||||||
15288 | // If the name in a friend declaration is neither qualified nor | ||||||
15289 | // a template-id and the declaration is a function or an | ||||||
15290 | // elaborated-type-specifier, the lookup to determine whether | ||||||
15291 | // the entity has been previously declared shall not consider | ||||||
15292 | // any scopes outside the innermost enclosing namespace. | ||||||
15293 | // | ||||||
15294 | // MSVC doesn't implement the above rule for types, so a friend tag | ||||||
15295 | // declaration may be a redeclaration of a type declared in an enclosing | ||||||
15296 | // scope. They do implement this rule for friend functions. | ||||||
15297 | // | ||||||
15298 | // Does it matter that this should be by scope instead of by | ||||||
15299 | // semantic context? | ||||||
15300 | if (!Previous.empty() && TUK == TUK_Friend) { | ||||||
15301 | DeclContext *EnclosingNS = SearchDC->getEnclosingNamespaceContext(); | ||||||
15302 | LookupResult::Filter F = Previous.makeFilter(); | ||||||
15303 | bool FriendSawTagOutsideEnclosingNamespace = false; | ||||||
15304 | while (F.hasNext()) { | ||||||
15305 | NamedDecl *ND = F.next(); | ||||||
15306 | DeclContext *DC = ND->getDeclContext()->getRedeclContext(); | ||||||
15307 | if (DC->isFileContext() && | ||||||
15308 | !EnclosingNS->Encloses(ND->getDeclContext())) { | ||||||
15309 | if (getLangOpts().MSVCCompat) | ||||||
15310 | FriendSawTagOutsideEnclosingNamespace = true; | ||||||
15311 | else | ||||||
15312 | F.erase(); | ||||||
15313 | } | ||||||
15314 | } | ||||||
15315 | F.done(); | ||||||
15316 | |||||||
15317 | // Diagnose this MSVC extension in the easy case where lookup would have | ||||||
15318 | // unambiguously found something outside the enclosing namespace. | ||||||
15319 | if (Previous.isSingleResult() && FriendSawTagOutsideEnclosingNamespace) { | ||||||
15320 | NamedDecl *ND = Previous.getFoundDecl(); | ||||||
15321 | Diag(NameLoc, diag::ext_friend_tag_redecl_outside_namespace) | ||||||
15322 | << createFriendTagNNSFixIt(*this, ND, S, NameLoc); | ||||||
15323 | } | ||||||
15324 | } | ||||||
15325 | |||||||
15326 | // Note: there used to be some attempt at recovery here. | ||||||
15327 | if (Previous.isAmbiguous()) | ||||||
15328 | return nullptr; | ||||||
15329 | |||||||
15330 | if (!getLangOpts().CPlusPlus && TUK != TUK_Reference) { | ||||||
15331 | // FIXME: This makes sure that we ignore the contexts associated | ||||||
15332 | // with C structs, unions, and enums when looking for a matching | ||||||
15333 | // tag declaration or definition. See the similar lookup tweak | ||||||
15334 | // in Sema::LookupName; is there a better way to deal with this? | ||||||
15335 | while (isa<RecordDecl>(SearchDC) || isa<EnumDecl>(SearchDC)) | ||||||
15336 | SearchDC = SearchDC->getParent(); | ||||||
15337 | } | ||||||
15338 | } | ||||||
15339 | |||||||
15340 | if (Previous.isSingleResult() && | ||||||
15341 | Previous.getFoundDecl()->isTemplateParameter()) { | ||||||
15342 | // Maybe we will complain about the shadowed template parameter. | ||||||
15343 | DiagnoseTemplateParameterShadow(NameLoc, Previous.getFoundDecl()); | ||||||
15344 | // Just pretend that we didn't see the previous declaration. | ||||||
15345 | Previous.clear(); | ||||||
15346 | } | ||||||
15347 | |||||||
15348 | if (getLangOpts().CPlusPlus && Name && DC && StdNamespace && | ||||||
15349 | DC->Equals(getStdNamespace())) { | ||||||
15350 | if (Name->isStr("bad_alloc")) { | ||||||
15351 | // This is a declaration of or a reference to "std::bad_alloc". | ||||||
15352 | isStdBadAlloc = true; | ||||||
15353 | |||||||
15354 | // If std::bad_alloc has been implicitly declared (but made invisible to | ||||||
15355 | // name lookup), fill in this implicit declaration as the previous | ||||||
15356 | // declaration, so that the declarations get chained appropriately. | ||||||
15357 | if (Previous.empty() && StdBadAlloc) | ||||||
15358 | Previous.addDecl(getStdBadAlloc()); | ||||||
15359 | } else if (Name->isStr("align_val_t")) { | ||||||
15360 | isStdAlignValT = true; | ||||||
15361 | if (Previous.empty() && StdAlignValT) | ||||||
15362 | Previous.addDecl(getStdAlignValT()); | ||||||
15363 | } | ||||||
15364 | } | ||||||
15365 | |||||||
15366 | // If we didn't find a previous declaration, and this is a reference | ||||||
15367 | // (or friend reference), move to the correct scope. In C++, we | ||||||
15368 | // also need to do a redeclaration lookup there, just in case | ||||||
15369 | // there's a shadow friend decl. | ||||||
15370 | if (Name && Previous.empty() && | ||||||
15371 | (TUK == TUK_Reference || TUK == TUK_Friend || IsTemplateParamOrArg)) { | ||||||
15372 | if (Invalid) goto CreateNewDecl; | ||||||
15373 | assert(SS.isEmpty())((SS.isEmpty()) ? static_cast<void> (0) : __assert_fail ("SS.isEmpty()", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 15373, __PRETTY_FUNCTION__)); | ||||||
15374 | |||||||
15375 | if (TUK == TUK_Reference || IsTemplateParamOrArg) { | ||||||
15376 | // C++ [basic.scope.pdecl]p5: | ||||||
15377 | // -- for an elaborated-type-specifier of the form | ||||||
15378 | // | ||||||
15379 | // class-key identifier | ||||||
15380 | // | ||||||
15381 | // if the elaborated-type-specifier is used in the | ||||||
15382 | // decl-specifier-seq or parameter-declaration-clause of a | ||||||
15383 | // function defined in namespace scope, the identifier is | ||||||
15384 | // declared as a class-name in the namespace that contains | ||||||
15385 | // the declaration; otherwise, except as a friend | ||||||
15386 | // declaration, the identifier is declared in the smallest | ||||||
15387 | // non-class, non-function-prototype scope that contains the | ||||||
15388 | // declaration. | ||||||
15389 | // | ||||||
15390 | // C99 6.7.2.3p8 has a similar (but not identical!) provision for | ||||||
15391 | // C structs and unions. | ||||||
15392 | // | ||||||
15393 | // It is an error in C++ to declare (rather than define) an enum | ||||||
15394 | // type, including via an elaborated type specifier. We'll | ||||||
15395 | // diagnose that later; for now, declare the enum in the same | ||||||
15396 | // scope as we would have picked for any other tag type. | ||||||
15397 | // | ||||||
15398 | // GNU C also supports this behavior as part of its incomplete | ||||||
15399 | // enum types extension, while GNU C++ does not. | ||||||
15400 | // | ||||||
15401 | // Find the context where we'll be declaring the tag. | ||||||
15402 | // FIXME: We would like to maintain the current DeclContext as the | ||||||
15403 | // lexical context, | ||||||
15404 | SearchDC = getTagInjectionContext(SearchDC); | ||||||
15405 | |||||||
15406 | // Find the scope where we'll be declaring the tag. | ||||||
15407 | S = getTagInjectionScope(S, getLangOpts()); | ||||||
15408 | } else { | ||||||
15409 | assert(TUK == TUK_Friend)((TUK == TUK_Friend) ? static_cast<void> (0) : __assert_fail ("TUK == TUK_Friend", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 15409, __PRETTY_FUNCTION__)); | ||||||
15410 | // C++ [namespace.memdef]p3: | ||||||
15411 | // If a friend declaration in a non-local class first declares a | ||||||
15412 | // class or function, the friend class or function is a member of | ||||||
15413 | // the innermost enclosing namespace. | ||||||
15414 | SearchDC = SearchDC->getEnclosingNamespaceContext(); | ||||||
15415 | } | ||||||
15416 | |||||||
15417 | // In C++, we need to do a redeclaration lookup to properly | ||||||
15418 | // diagnose some problems. | ||||||
15419 | // FIXME: redeclaration lookup is also used (with and without C++) to find a | ||||||
15420 | // hidden declaration so that we don't get ambiguity errors when using a | ||||||
15421 | // type declared by an elaborated-type-specifier. In C that is not correct | ||||||
15422 | // and we should instead merge compatible types found by lookup. | ||||||
15423 | if (getLangOpts().CPlusPlus) { | ||||||
15424 | Previous.setRedeclarationKind(forRedeclarationInCurContext()); | ||||||
15425 | LookupQualifiedName(Previous, SearchDC); | ||||||
15426 | } else { | ||||||
15427 | Previous.setRedeclarationKind(forRedeclarationInCurContext()); | ||||||
15428 | LookupName(Previous, S); | ||||||
15429 | } | ||||||
15430 | } | ||||||
15431 | |||||||
15432 | // If we have a known previous declaration to use, then use it. | ||||||
15433 | if (Previous.empty() && SkipBody && SkipBody->Previous) | ||||||
15434 | Previous.addDecl(SkipBody->Previous); | ||||||
15435 | |||||||
15436 | if (!Previous.empty()) { | ||||||
15437 | NamedDecl *PrevDecl = Previous.getFoundDecl(); | ||||||
15438 | NamedDecl *DirectPrevDecl = Previous.getRepresentativeDecl(); | ||||||
15439 | |||||||
15440 | // It's okay to have a tag decl in the same scope as a typedef | ||||||
15441 | // which hides a tag decl in the same scope. Finding this | ||||||
15442 | // insanity with a redeclaration lookup can only actually happen | ||||||
15443 | // in C++. | ||||||
15444 | // | ||||||
15445 | // This is also okay for elaborated-type-specifiers, which is | ||||||
15446 | // technically forbidden by the current standard but which is | ||||||
15447 | // okay according to the likely resolution of an open issue; | ||||||
15448 | // see http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_active.html#407 | ||||||
15449 | if (getLangOpts().CPlusPlus) { | ||||||
15450 | if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(PrevDecl)) { | ||||||
15451 | if (const TagType *TT = TD->getUnderlyingType()->getAs<TagType>()) { | ||||||
15452 | TagDecl *Tag = TT->getDecl(); | ||||||
15453 | if (Tag->getDeclName() == Name && | ||||||
15454 | Tag->getDeclContext()->getRedeclContext() | ||||||
15455 | ->Equals(TD->getDeclContext()->getRedeclContext())) { | ||||||
15456 | PrevDecl = Tag; | ||||||
15457 | Previous.clear(); | ||||||
15458 | Previous.addDecl(Tag); | ||||||
15459 | Previous.resolveKind(); | ||||||
15460 | } | ||||||
15461 | } | ||||||
15462 | } | ||||||
15463 | } | ||||||
15464 | |||||||
15465 | // If this is a redeclaration of a using shadow declaration, it must | ||||||
15466 | // declare a tag in the same context. In MSVC mode, we allow a | ||||||
15467 | // redefinition if either context is within the other. | ||||||
15468 | if (auto *Shadow = dyn_cast<UsingShadowDecl>(DirectPrevDecl)) { | ||||||
15469 | auto *OldTag = dyn_cast<TagDecl>(PrevDecl); | ||||||
15470 | if (SS.isEmpty() && TUK != TUK_Reference && TUK != TUK_Friend && | ||||||
15471 | isDeclInScope(Shadow, SearchDC, S, isMemberSpecialization) && | ||||||
15472 | !(OldTag && isAcceptableTagRedeclContext( | ||||||
15473 | *this, OldTag->getDeclContext(), SearchDC))) { | ||||||
15474 | Diag(KWLoc, diag::err_using_decl_conflict_reverse); | ||||||
15475 | Diag(Shadow->getTargetDecl()->getLocation(), | ||||||
15476 | diag::note_using_decl_target); | ||||||
15477 | Diag(Shadow->getUsingDecl()->getLocation(), diag::note_using_decl) | ||||||
15478 | << 0; | ||||||
15479 | // Recover by ignoring the old declaration. | ||||||
15480 | Previous.clear(); | ||||||
15481 | goto CreateNewDecl; | ||||||
15482 | } | ||||||
15483 | } | ||||||
15484 | |||||||
15485 | if (TagDecl *PrevTagDecl = dyn_cast<TagDecl>(PrevDecl)) { | ||||||
15486 | // If this is a use of a previous tag, or if the tag is already declared | ||||||
15487 | // in the same scope (so that the definition/declaration completes or | ||||||
15488 | // rementions the tag), reuse the decl. | ||||||
15489 | if (TUK == TUK_Reference || TUK == TUK_Friend || | ||||||
15490 | isDeclInScope(DirectPrevDecl, SearchDC, S, | ||||||
15491 | SS.isNotEmpty() || isMemberSpecialization)) { | ||||||
15492 | // Make sure that this wasn't declared as an enum and now used as a | ||||||
15493 | // struct or something similar. | ||||||
15494 | if (!isAcceptableTagRedeclaration(PrevTagDecl, Kind, | ||||||
15495 | TUK == TUK_Definition, KWLoc, | ||||||
15496 | Name)) { | ||||||
15497 | bool SafeToContinue | ||||||
15498 | = (PrevTagDecl->getTagKind() != TTK_Enum && | ||||||
15499 | Kind != TTK_Enum); | ||||||
15500 | if (SafeToContinue) | ||||||
15501 | Diag(KWLoc, diag::err_use_with_wrong_tag) | ||||||
15502 | << Name | ||||||
15503 | << FixItHint::CreateReplacement(SourceRange(KWLoc), | ||||||
15504 | PrevTagDecl->getKindName()); | ||||||
15505 | else | ||||||
15506 | Diag(KWLoc, diag::err_use_with_wrong_tag) << Name; | ||||||
15507 | Diag(PrevTagDecl->getLocation(), diag::note_previous_use); | ||||||
15508 | |||||||
15509 | if (SafeToContinue) | ||||||
15510 | Kind = PrevTagDecl->getTagKind(); | ||||||
15511 | else { | ||||||
15512 | // Recover by making this an anonymous redefinition. | ||||||
15513 | Name = nullptr; | ||||||
15514 | Previous.clear(); | ||||||
15515 | Invalid = true; | ||||||
15516 | } | ||||||
15517 | } | ||||||
15518 | |||||||
15519 | if (Kind == TTK_Enum && PrevTagDecl->getTagKind() == TTK_Enum) { | ||||||
15520 | const EnumDecl *PrevEnum = cast<EnumDecl>(PrevTagDecl); | ||||||
15521 | |||||||
15522 | // If this is an elaborated-type-specifier for a scoped enumeration, | ||||||
15523 | // the 'class' keyword is not necessary and not permitted. | ||||||
15524 | if (TUK == TUK_Reference || TUK == TUK_Friend) { | ||||||
15525 | if (ScopedEnum) | ||||||
15526 | Diag(ScopedEnumKWLoc, diag::err_enum_class_reference) | ||||||
15527 | << PrevEnum->isScoped() | ||||||
15528 | << FixItHint::CreateRemoval(ScopedEnumKWLoc); | ||||||
15529 | return PrevTagDecl; | ||||||
15530 | } | ||||||
15531 | |||||||
15532 | QualType EnumUnderlyingTy; | ||||||
15533 | if (TypeSourceInfo *TI = EnumUnderlying.dyn_cast<TypeSourceInfo*>()) | ||||||
15534 | EnumUnderlyingTy = TI->getType().getUnqualifiedType(); | ||||||
15535 | else if (const Type *T = EnumUnderlying.dyn_cast<const Type*>()) | ||||||
15536 | EnumUnderlyingTy = QualType(T, 0); | ||||||
15537 | |||||||
15538 | // All conflicts with previous declarations are recovered by | ||||||
15539 | // returning the previous declaration, unless this is a definition, | ||||||
15540 | // in which case we want the caller to bail out. | ||||||
15541 | if (CheckEnumRedeclaration(NameLoc.isValid() ? NameLoc : KWLoc, | ||||||
15542 | ScopedEnum, EnumUnderlyingTy, | ||||||
15543 | IsFixed, PrevEnum)) | ||||||
15544 | return TUK == TUK_Declaration ? PrevTagDecl : nullptr; | ||||||
15545 | } | ||||||
15546 | |||||||
15547 | // C++11 [class.mem]p1: | ||||||
15548 | // A member shall not be declared twice in the member-specification, | ||||||
15549 | // except that a nested class or member class template can be declared | ||||||
15550 | // and then later defined. | ||||||
15551 | if (TUK == TUK_Declaration && PrevDecl->isCXXClassMember() && | ||||||
15552 | S->isDeclScope(PrevDecl)) { | ||||||
15553 | Diag(NameLoc, diag::ext_member_redeclared); | ||||||
15554 | Diag(PrevTagDecl->getLocation(), diag::note_previous_declaration); | ||||||
15555 | } | ||||||
15556 | |||||||
15557 | if (!Invalid) { | ||||||
15558 | // If this is a use, just return the declaration we found, unless | ||||||
15559 | // we have attributes. | ||||||
15560 | if (TUK == TUK_Reference || TUK == TUK_Friend) { | ||||||
15561 | if (!Attrs.empty()) { | ||||||
15562 | // FIXME: Diagnose these attributes. For now, we create a new | ||||||
15563 | // declaration to hold them. | ||||||
15564 | } else if (TUK == TUK_Reference && | ||||||
15565 | (PrevTagDecl->getFriendObjectKind() == | ||||||
15566 | Decl::FOK_Undeclared || | ||||||
15567 | PrevDecl->getOwningModule() != getCurrentModule()) && | ||||||
15568 | SS.isEmpty()) { | ||||||
15569 | // This declaration is a reference to an existing entity, but | ||||||
15570 | // has different visibility from that entity: it either makes | ||||||
15571 | // a friend visible or it makes a type visible in a new module. | ||||||
15572 | // In either case, create a new declaration. We only do this if | ||||||
15573 | // the declaration would have meant the same thing if no prior | ||||||
15574 | // declaration were found, that is, if it was found in the same | ||||||
15575 | // scope where we would have injected a declaration. | ||||||
15576 | if (!getTagInjectionContext(CurContext)->getRedeclContext() | ||||||
15577 | ->Equals(PrevDecl->getDeclContext()->getRedeclContext())) | ||||||
15578 | return PrevTagDecl; | ||||||
15579 | // This is in the injected scope, create a new declaration in | ||||||
15580 | // that scope. | ||||||
15581 | S = getTagInjectionScope(S, getLangOpts()); | ||||||
15582 | } else { | ||||||
15583 | return PrevTagDecl; | ||||||
15584 | } | ||||||
15585 | } | ||||||
15586 | |||||||
15587 | // Diagnose attempts to redefine a tag. | ||||||
15588 | if (TUK == TUK_Definition) { | ||||||
15589 | if (NamedDecl *Def = PrevTagDecl->getDefinition()) { | ||||||
15590 | // If we're defining a specialization and the previous definition | ||||||
15591 | // is from an implicit instantiation, don't emit an error | ||||||
15592 | // here; we'll catch this in the general case below. | ||||||
15593 | bool IsExplicitSpecializationAfterInstantiation = false; | ||||||
15594 | if (isMemberSpecialization) { | ||||||
15595 | if (CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(Def)) | ||||||
15596 | IsExplicitSpecializationAfterInstantiation = | ||||||
15597 | RD->getTemplateSpecializationKind() != | ||||||
15598 | TSK_ExplicitSpecialization; | ||||||
15599 | else if (EnumDecl *ED = dyn_cast<EnumDecl>(Def)) | ||||||
15600 | IsExplicitSpecializationAfterInstantiation = | ||||||
15601 | ED->getTemplateSpecializationKind() != | ||||||
15602 | TSK_ExplicitSpecialization; | ||||||
15603 | } | ||||||
15604 | |||||||
15605 | // Note that clang allows ODR-like semantics for ObjC/C, i.e., do | ||||||
15606 | // not keep more that one definition around (merge them). However, | ||||||
15607 | // ensure the decl passes the structural compatibility check in | ||||||
15608 | // C11 6.2.7/1 (or 6.1.2.6/1 in C89). | ||||||
15609 | NamedDecl *Hidden = nullptr; | ||||||
15610 | if (SkipBody && !hasVisibleDefinition(Def, &Hidden)) { | ||||||
15611 | // There is a definition of this tag, but it is not visible. We | ||||||
15612 | // explicitly make use of C++'s one definition rule here, and | ||||||
15613 | // assume that this definition is identical to the hidden one | ||||||
15614 | // we already have. Make the existing definition visible and | ||||||
15615 | // use it in place of this one. | ||||||
15616 | if (!getLangOpts().CPlusPlus) { | ||||||
15617 | // Postpone making the old definition visible until after we | ||||||
15618 | // complete parsing the new one and do the structural | ||||||
15619 | // comparison. | ||||||
15620 | SkipBody->CheckSameAsPrevious = true; | ||||||
15621 | SkipBody->New = createTagFromNewDecl(); | ||||||
15622 | SkipBody->Previous = Def; | ||||||
15623 | return Def; | ||||||
15624 | } else { | ||||||
15625 | SkipBody->ShouldSkip = true; | ||||||
15626 | SkipBody->Previous = Def; | ||||||
15627 | makeMergedDefinitionVisible(Hidden); | ||||||
15628 | // Carry on and handle it like a normal definition. We'll | ||||||
15629 | // skip starting the definitiion later. | ||||||
15630 | } | ||||||
15631 | } else if (!IsExplicitSpecializationAfterInstantiation) { | ||||||
15632 | // A redeclaration in function prototype scope in C isn't | ||||||
15633 | // visible elsewhere, so merely issue a warning. | ||||||
15634 | if (!getLangOpts().CPlusPlus && S->containedInPrototypeScope()) | ||||||
15635 | Diag(NameLoc, diag::warn_redefinition_in_param_list) << Name; | ||||||
15636 | else | ||||||
15637 | Diag(NameLoc, diag::err_redefinition) << Name; | ||||||
15638 | notePreviousDefinition(Def, | ||||||
15639 | NameLoc.isValid() ? NameLoc : KWLoc); | ||||||
15640 | // If this is a redefinition, recover by making this | ||||||
15641 | // struct be anonymous, which will make any later | ||||||
15642 | // references get the previous definition. | ||||||
15643 | Name = nullptr; | ||||||
15644 | Previous.clear(); | ||||||
15645 | Invalid = true; | ||||||
15646 | } | ||||||
15647 | } else { | ||||||
15648 | // If the type is currently being defined, complain | ||||||
15649 | // about a nested redefinition. | ||||||
15650 | auto *TD = Context.getTagDeclType(PrevTagDecl)->getAsTagDecl(); | ||||||
15651 | if (TD->isBeingDefined()) { | ||||||
15652 | Diag(NameLoc, diag::err_nested_redefinition) << Name; | ||||||
15653 | Diag(PrevTagDecl->getLocation(), | ||||||
15654 | diag::note_previous_definition); | ||||||
15655 | Name = nullptr; | ||||||
15656 | Previous.clear(); | ||||||
15657 | Invalid = true; | ||||||
15658 | } | ||||||
15659 | } | ||||||
15660 | |||||||
15661 | // Okay, this is definition of a previously declared or referenced | ||||||
15662 | // tag. We're going to create a new Decl for it. | ||||||
15663 | } | ||||||
15664 | |||||||
15665 | // Okay, we're going to make a redeclaration. If this is some kind | ||||||
15666 | // of reference, make sure we build the redeclaration in the same DC | ||||||
15667 | // as the original, and ignore the current access specifier. | ||||||
15668 | if (TUK == TUK_Friend || TUK == TUK_Reference) { | ||||||
15669 | SearchDC = PrevTagDecl->getDeclContext(); | ||||||
15670 | AS = AS_none; | ||||||
15671 | } | ||||||
15672 | } | ||||||
15673 | // If we get here we have (another) forward declaration or we | ||||||
15674 | // have a definition. Just create a new decl. | ||||||
15675 | |||||||
15676 | } else { | ||||||
15677 | // If we get here, this is a definition of a new tag type in a nested | ||||||
15678 | // scope, e.g. "struct foo; void bar() { struct foo; }", just create a | ||||||
15679 | // new decl/type. We set PrevDecl to NULL so that the entities | ||||||
15680 | // have distinct types. | ||||||
15681 | Previous.clear(); | ||||||
15682 | } | ||||||
15683 | // If we get here, we're going to create a new Decl. If PrevDecl | ||||||
15684 | // is non-NULL, it's a definition of the tag declared by | ||||||
15685 | // PrevDecl. If it's NULL, we have a new definition. | ||||||
15686 | |||||||
15687 | // Otherwise, PrevDecl is not a tag, but was found with tag | ||||||
15688 | // lookup. This is only actually possible in C++, where a few | ||||||
15689 | // things like templates still live in the tag namespace. | ||||||
15690 | } else { | ||||||
15691 | // Use a better diagnostic if an elaborated-type-specifier | ||||||
15692 | // found the wrong kind of type on the first | ||||||
15693 | // (non-redeclaration) lookup. | ||||||
15694 | if ((TUK == TUK_Reference || TUK == TUK_Friend) && | ||||||
15695 | !Previous.isForRedeclaration()) { | ||||||
15696 | NonTagKind NTK = getNonTagTypeDeclKind(PrevDecl, Kind); | ||||||
15697 | Diag(NameLoc, diag::err_tag_reference_non_tag) << PrevDecl << NTK | ||||||
15698 | << Kind; | ||||||
15699 | Diag(PrevDecl->getLocation(), diag::note_declared_at); | ||||||
15700 | Invalid = true; | ||||||
15701 | |||||||
15702 | // Otherwise, only diagnose if the declaration is in scope. | ||||||
15703 | } else if (!isDeclInScope(DirectPrevDecl, SearchDC, S, | ||||||
15704 | SS.isNotEmpty() || isMemberSpecialization)) { | ||||||
15705 | // do nothing | ||||||
15706 | |||||||
15707 | // Diagnose implicit declarations introduced by elaborated types. | ||||||
15708 | } else if (TUK == TUK_Reference || TUK == TUK_Friend) { | ||||||
15709 | NonTagKind NTK = getNonTagTypeDeclKind(PrevDecl, Kind); | ||||||
15710 | Diag(NameLoc, diag::err_tag_reference_conflict) << NTK; | ||||||
15711 | Diag(PrevDecl->getLocation(), diag::note_previous_decl) << PrevDecl; | ||||||
15712 | Invalid = true; | ||||||
15713 | |||||||
15714 | // Otherwise it's a declaration. Call out a particularly common | ||||||
15715 | // case here. | ||||||
15716 | } else if (TypedefNameDecl *TND = dyn_cast<TypedefNameDecl>(PrevDecl)) { | ||||||
15717 | unsigned Kind = 0; | ||||||
15718 | if (isa<TypeAliasDecl>(PrevDecl)) Kind = 1; | ||||||
15719 | Diag(NameLoc, diag::err_tag_definition_of_typedef) | ||||||
15720 | << Name << Kind << TND->getUnderlyingType(); | ||||||
15721 | Diag(PrevDecl->getLocation(), diag::note_previous_decl) << PrevDecl; | ||||||
15722 | Invalid = true; | ||||||
15723 | |||||||
15724 | // Otherwise, diagnose. | ||||||
15725 | } else { | ||||||
15726 | // The tag name clashes with something else in the target scope, | ||||||
15727 | // issue an error and recover by making this tag be anonymous. | ||||||
15728 | Diag(NameLoc, diag::err_redefinition_different_kind) << Name; | ||||||
15729 | notePreviousDefinition(PrevDecl, NameLoc); | ||||||
15730 | Name = nullptr; | ||||||
15731 | Invalid = true; | ||||||
15732 | } | ||||||
15733 | |||||||
15734 | // The existing declaration isn't relevant to us; we're in a | ||||||
15735 | // new scope, so clear out the previous declaration. | ||||||
15736 | Previous.clear(); | ||||||
15737 | } | ||||||
15738 | } | ||||||
15739 | |||||||
15740 | CreateNewDecl: | ||||||
15741 | |||||||
15742 | TagDecl *PrevDecl = nullptr; | ||||||
15743 | if (Previous.isSingleResult()) | ||||||
15744 | PrevDecl = cast<TagDecl>(Previous.getFoundDecl()); | ||||||
15745 | |||||||
15746 | // If there is an identifier, use the location of the identifier as the | ||||||
15747 | // location of the decl, otherwise use the location of the struct/union | ||||||
15748 | // keyword. | ||||||
15749 | SourceLocation Loc = NameLoc.isValid() ? NameLoc : KWLoc; | ||||||
15750 | |||||||
15751 | // Otherwise, create a new declaration. If there is a previous | ||||||
15752 | // declaration of the same entity, the two will be linked via | ||||||
15753 | // PrevDecl. | ||||||
15754 | TagDecl *New; | ||||||
15755 | |||||||
15756 | if (Kind == TTK_Enum) { | ||||||
15757 | // FIXME: Tag decls should be chained to any simultaneous vardecls, e.g.: | ||||||
15758 | // enum X { A, B, C } D; D should chain to X. | ||||||
15759 | New = EnumDecl::Create(Context, SearchDC, KWLoc, Loc, Name, | ||||||
15760 | cast_or_null<EnumDecl>(PrevDecl), ScopedEnum, | ||||||
15761 | ScopedEnumUsesClassTag, IsFixed); | ||||||
15762 | |||||||
15763 | if (isStdAlignValT && (!StdAlignValT || getStdAlignValT()->isImplicit())) | ||||||
15764 | StdAlignValT = cast<EnumDecl>(New); | ||||||
15765 | |||||||
15766 | // If this is an undefined enum, warn. | ||||||
15767 | if (TUK != TUK_Definition && !Invalid) { | ||||||
15768 | TagDecl *Def; | ||||||
15769 | if (IsFixed && cast<EnumDecl>(New)->isFixed()) { | ||||||
15770 | // C++0x: 7.2p2: opaque-enum-declaration. | ||||||
15771 | // Conflicts are diagnosed above. Do nothing. | ||||||
15772 | } | ||||||
15773 | else if (PrevDecl && (Def = cast<EnumDecl>(PrevDecl)->getDefinition())) { | ||||||
15774 | Diag(Loc, diag::ext_forward_ref_enum_def) | ||||||
15775 | << New; | ||||||
15776 | Diag(Def->getLocation(), diag::note_previous_definition); | ||||||
15777 | } else { | ||||||
15778 | unsigned DiagID = diag::ext_forward_ref_enum; | ||||||
15779 | if (getLangOpts().MSVCCompat) | ||||||
15780 | DiagID = diag::ext_ms_forward_ref_enum; | ||||||
15781 | else if (getLangOpts().CPlusPlus) | ||||||
15782 | DiagID = diag::err_forward_ref_enum; | ||||||
15783 | Diag(Loc, DiagID); | ||||||
15784 | } | ||||||
15785 | } | ||||||
15786 | |||||||
15787 | if (EnumUnderlying) { | ||||||
15788 | EnumDecl *ED = cast<EnumDecl>(New); | ||||||
15789 | if (TypeSourceInfo *TI = EnumUnderlying.dyn_cast<TypeSourceInfo*>()) | ||||||
15790 | ED->setIntegerTypeSourceInfo(TI); | ||||||
15791 | else | ||||||
15792 | ED->setIntegerType(QualType(EnumUnderlying.get<const Type*>(), 0)); | ||||||
15793 | ED->setPromotionType(ED->getIntegerType()); | ||||||
15794 | assert(ED->isComplete() && "enum with type should be complete")((ED->isComplete() && "enum with type should be complete" ) ? static_cast<void> (0) : __assert_fail ("ED->isComplete() && \"enum with type should be complete\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 15794, __PRETTY_FUNCTION__)); | ||||||
15795 | } | ||||||
15796 | } else { | ||||||
15797 | // struct/union/class | ||||||
15798 | |||||||
15799 | // FIXME: Tag decls should be chained to any simultaneous vardecls, e.g.: | ||||||
15800 | // struct X { int A; } D; D should chain to X. | ||||||
15801 | if (getLangOpts().CPlusPlus) { | ||||||
15802 | // FIXME: Look for a way to use RecordDecl for simple structs. | ||||||
15803 | New = CXXRecordDecl::Create(Context, Kind, SearchDC, KWLoc, Loc, Name, | ||||||
15804 | cast_or_null<CXXRecordDecl>(PrevDecl)); | ||||||
15805 | |||||||
15806 | if (isStdBadAlloc && (!StdBadAlloc || getStdBadAlloc()->isImplicit())) | ||||||
15807 | StdBadAlloc = cast<CXXRecordDecl>(New); | ||||||
15808 | } else | ||||||
15809 | New = RecordDecl::Create(Context, Kind, SearchDC, KWLoc, Loc, Name, | ||||||
15810 | cast_or_null<RecordDecl>(PrevDecl)); | ||||||
15811 | } | ||||||
15812 | |||||||
15813 | // C++11 [dcl.type]p3: | ||||||
15814 | // A type-specifier-seq shall not define a class or enumeration [...]. | ||||||
15815 | if (getLangOpts().CPlusPlus && (IsTypeSpecifier || IsTemplateParamOrArg) && | ||||||
15816 | TUK == TUK_Definition) { | ||||||
15817 | Diag(New->getLocation(), diag::err_type_defined_in_type_specifier) | ||||||
15818 | << Context.getTagDeclType(New); | ||||||
15819 | Invalid = true; | ||||||
15820 | } | ||||||
15821 | |||||||
15822 | if (!Invalid && getLangOpts().CPlusPlus && TUK == TUK_Definition && | ||||||
15823 | DC->getDeclKind() == Decl::Enum) { | ||||||
15824 | Diag(New->getLocation(), diag::err_type_defined_in_enum) | ||||||
15825 | << Context.getTagDeclType(New); | ||||||
15826 | Invalid = true; | ||||||
15827 | } | ||||||
15828 | |||||||
15829 | // Maybe add qualifier info. | ||||||
15830 | if (SS.isNotEmpty()) { | ||||||
15831 | if (SS.isSet()) { | ||||||
15832 | // If this is either a declaration or a definition, check the | ||||||
15833 | // nested-name-specifier against the current context. | ||||||
15834 | if ((TUK == TUK_Definition || TUK == TUK_Declaration) && | ||||||
15835 | diagnoseQualifiedDeclaration(SS, DC, OrigName, Loc, | ||||||
15836 | isMemberSpecialization)) | ||||||
15837 | Invalid = true; | ||||||
15838 | |||||||
15839 | New->setQualifierInfo(SS.getWithLocInContext(Context)); | ||||||
15840 | if (TemplateParameterLists.size() > 0) { | ||||||
15841 | New->setTemplateParameterListsInfo(Context, TemplateParameterLists); | ||||||
15842 | } | ||||||
15843 | } | ||||||
15844 | else | ||||||
15845 | Invalid = true; | ||||||
15846 | } | ||||||
15847 | |||||||
15848 | if (RecordDecl *RD = dyn_cast<RecordDecl>(New)) { | ||||||
15849 | // Add alignment attributes if necessary; these attributes are checked when | ||||||
15850 | // the ASTContext lays out the structure. | ||||||
15851 | // | ||||||
15852 | // It is important for implementing the correct semantics that this | ||||||
15853 | // happen here (in ActOnTag). The #pragma pack stack is | ||||||
15854 | // maintained as a result of parser callbacks which can occur at | ||||||
15855 | // many points during the parsing of a struct declaration (because | ||||||
15856 | // the #pragma tokens are effectively skipped over during the | ||||||
15857 | // parsing of the struct). | ||||||
15858 | if (TUK == TUK_Definition && (!SkipBody || !SkipBody->ShouldSkip)) { | ||||||
15859 | AddAlignmentAttributesForRecord(RD); | ||||||
15860 | AddMsStructLayoutForRecord(RD); | ||||||
15861 | } | ||||||
15862 | } | ||||||
15863 | |||||||
15864 | if (ModulePrivateLoc.isValid()) { | ||||||
15865 | if (isMemberSpecialization) | ||||||
15866 | Diag(New->getLocation(), diag::err_module_private_specialization) | ||||||
15867 | << 2 | ||||||
15868 | << FixItHint::CreateRemoval(ModulePrivateLoc); | ||||||
15869 | // __module_private__ does not apply to local classes. However, we only | ||||||
15870 | // diagnose this as an error when the declaration specifiers are | ||||||
15871 | // freestanding. Here, we just ignore the __module_private__. | ||||||
15872 | else if (!SearchDC->isFunctionOrMethod()) | ||||||
15873 | New->setModulePrivate(); | ||||||
15874 | } | ||||||
15875 | |||||||
15876 | // If this is a specialization of a member class (of a class template), | ||||||
15877 | // check the specialization. | ||||||
15878 | if (isMemberSpecialization && CheckMemberSpecialization(New, Previous)) | ||||||
15879 | Invalid = true; | ||||||
15880 | |||||||
15881 | // If we're declaring or defining a tag in function prototype scope in C, | ||||||
15882 | // note that this type can only be used within the function and add it to | ||||||
15883 | // the list of decls to inject into the function definition scope. | ||||||
15884 | if ((Name || Kind == TTK_Enum) && | ||||||
15885 | getNonFieldDeclScope(S)->isFunctionPrototypeScope()) { | ||||||
15886 | if (getLangOpts().CPlusPlus) { | ||||||
15887 | // C++ [dcl.fct]p6: | ||||||
15888 | // Types shall not be defined in return or parameter types. | ||||||
15889 | if (TUK == TUK_Definition && !IsTypeSpecifier) { | ||||||
15890 | Diag(Loc, diag::err_type_defined_in_param_type) | ||||||
15891 | << Name; | ||||||
15892 | Invalid = true; | ||||||
15893 | } | ||||||
15894 | } else if (!PrevDecl) { | ||||||
15895 | Diag(Loc, diag::warn_decl_in_param_list) << Context.getTagDeclType(New); | ||||||
15896 | } | ||||||
15897 | } | ||||||
15898 | |||||||
15899 | if (Invalid) | ||||||
15900 | New->setInvalidDecl(); | ||||||
15901 | |||||||
15902 | // Set the lexical context. If the tag has a C++ scope specifier, the | ||||||
15903 | // lexical context will be different from the semantic context. | ||||||
15904 | New->setLexicalDeclContext(CurContext); | ||||||
15905 | |||||||
15906 | // Mark this as a friend decl if applicable. | ||||||
15907 | // In Microsoft mode, a friend declaration also acts as a forward | ||||||
15908 | // declaration so we always pass true to setObjectOfFriendDecl to make | ||||||
15909 | // the tag name visible. | ||||||
15910 | if (TUK == TUK_Friend) | ||||||
15911 | New->setObjectOfFriendDecl(getLangOpts().MSVCCompat); | ||||||
15912 | |||||||
15913 | // Set the access specifier. | ||||||
15914 | if (!Invalid && SearchDC->isRecord()) | ||||||
15915 | SetMemberAccessSpecifier(New, PrevDecl, AS); | ||||||
15916 | |||||||
15917 | if (PrevDecl) | ||||||
15918 | CheckRedeclarationModuleOwnership(New, PrevDecl); | ||||||
15919 | |||||||
15920 | if (TUK == TUK_Definition && (!SkipBody || !SkipBody->ShouldSkip)) | ||||||
15921 | New->startDefinition(); | ||||||
15922 | |||||||
15923 | ProcessDeclAttributeList(S, New, Attrs); | ||||||
15924 | AddPragmaAttributes(S, New); | ||||||
15925 | |||||||
15926 | // If this has an identifier, add it to the scope stack. | ||||||
15927 | if (TUK == TUK_Friend) { | ||||||
15928 | // We might be replacing an existing declaration in the lookup tables; | ||||||
15929 | // if so, borrow its access specifier. | ||||||
15930 | if (PrevDecl) | ||||||
15931 | New->setAccess(PrevDecl->getAccess()); | ||||||
15932 | |||||||
15933 | DeclContext *DC = New->getDeclContext()->getRedeclContext(); | ||||||
15934 | DC->makeDeclVisibleInContext(New); | ||||||
15935 | if (Name) // can be null along some error paths | ||||||
15936 | if (Scope *EnclosingScope = getScopeForDeclContext(S, DC)) | ||||||
15937 | PushOnScopeChains(New, EnclosingScope, /* AddToContext = */ false); | ||||||
15938 | } else if (Name) { | ||||||
15939 | S = getNonFieldDeclScope(S); | ||||||
15940 | PushOnScopeChains(New, S, true); | ||||||
15941 | } else { | ||||||
15942 | CurContext->addDecl(New); | ||||||
15943 | } | ||||||
15944 | |||||||
15945 | // If this is the C FILE type, notify the AST context. | ||||||
15946 | if (IdentifierInfo *II = New->getIdentifier()) | ||||||
15947 | if (!New->isInvalidDecl() && | ||||||
15948 | New->getDeclContext()->getRedeclContext()->isTranslationUnit() && | ||||||
15949 | II->isStr("FILE")) | ||||||
15950 | Context.setFILEDecl(New); | ||||||
15951 | |||||||
15952 | if (PrevDecl) | ||||||
15953 | mergeDeclAttributes(New, PrevDecl); | ||||||
15954 | |||||||
15955 | if (auto *CXXRD = dyn_cast<CXXRecordDecl>(New)) | ||||||
15956 | inferGslOwnerPointerAttribute(CXXRD); | ||||||
15957 | |||||||
15958 | // If there's a #pragma GCC visibility in scope, set the visibility of this | ||||||
15959 | // record. | ||||||
15960 | AddPushedVisibilityAttribute(New); | ||||||
15961 | |||||||
15962 | if (isMemberSpecialization && !New->isInvalidDecl()) | ||||||
15963 | CompleteMemberSpecialization(New, Previous); | ||||||
15964 | |||||||
15965 | OwnedDecl = true; | ||||||
15966 | // In C++, don't return an invalid declaration. We can't recover well from | ||||||
15967 | // the cases where we make the type anonymous. | ||||||
15968 | if (Invalid && getLangOpts().CPlusPlus) { | ||||||
15969 | if (New->isBeingDefined()) | ||||||
15970 | if (auto RD = dyn_cast<RecordDecl>(New)) | ||||||
15971 | RD->completeDefinition(); | ||||||
15972 | return nullptr; | ||||||
15973 | } else if (SkipBody && SkipBody->ShouldSkip) { | ||||||
15974 | return SkipBody->Previous; | ||||||
15975 | } else { | ||||||
15976 | return New; | ||||||
15977 | } | ||||||
15978 | } | ||||||
15979 | |||||||
15980 | void Sema::ActOnTagStartDefinition(Scope *S, Decl *TagD) { | ||||||
15981 | AdjustDeclIfTemplate(TagD); | ||||||
15982 | TagDecl *Tag = cast<TagDecl>(TagD); | ||||||
15983 | |||||||
15984 | // Enter the tag context. | ||||||
15985 | PushDeclContext(S, Tag); | ||||||
15986 | |||||||
15987 | ActOnDocumentableDecl(TagD); | ||||||
15988 | |||||||
15989 | // If there's a #pragma GCC visibility in scope, set the visibility of this | ||||||
15990 | // record. | ||||||
15991 | AddPushedVisibilityAttribute(Tag); | ||||||
15992 | } | ||||||
15993 | |||||||
15994 | bool Sema::ActOnDuplicateDefinition(DeclSpec &DS, Decl *Prev, | ||||||
15995 | SkipBodyInfo &SkipBody) { | ||||||
15996 | if (!hasStructuralCompatLayout(Prev, SkipBody.New)) | ||||||
15997 | return false; | ||||||
15998 | |||||||
15999 | // Make the previous decl visible. | ||||||
16000 | makeMergedDefinitionVisible(SkipBody.Previous); | ||||||
16001 | return true; | ||||||
16002 | } | ||||||
16003 | |||||||
16004 | Decl *Sema::ActOnObjCContainerStartDefinition(Decl *IDecl) { | ||||||
16005 | assert(isa<ObjCContainerDecl>(IDecl) &&((isa<ObjCContainerDecl>(IDecl) && "ActOnObjCContainerStartDefinition - Not ObjCContainerDecl" ) ? static_cast<void> (0) : __assert_fail ("isa<ObjCContainerDecl>(IDecl) && \"ActOnObjCContainerStartDefinition - Not ObjCContainerDecl\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 16006, __PRETTY_FUNCTION__)) | ||||||
16006 | "ActOnObjCContainerStartDefinition - Not ObjCContainerDecl")((isa<ObjCContainerDecl>(IDecl) && "ActOnObjCContainerStartDefinition - Not ObjCContainerDecl" ) ? static_cast<void> (0) : __assert_fail ("isa<ObjCContainerDecl>(IDecl) && \"ActOnObjCContainerStartDefinition - Not ObjCContainerDecl\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 16006, __PRETTY_FUNCTION__)); | ||||||
16007 | DeclContext *OCD = cast<DeclContext>(IDecl); | ||||||
16008 | assert(getContainingDC(OCD) == CurContext &&((getContainingDC(OCD) == CurContext && "The next DeclContext should be lexically contained in the current one." ) ? static_cast<void> (0) : __assert_fail ("getContainingDC(OCD) == CurContext && \"The next DeclContext should be lexically contained in the current one.\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 16009, __PRETTY_FUNCTION__)) | ||||||
16009 | "The next DeclContext should be lexically contained in the current one.")((getContainingDC(OCD) == CurContext && "The next DeclContext should be lexically contained in the current one." ) ? static_cast<void> (0) : __assert_fail ("getContainingDC(OCD) == CurContext && \"The next DeclContext should be lexically contained in the current one.\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 16009, __PRETTY_FUNCTION__)); | ||||||
16010 | CurContext = OCD; | ||||||
16011 | return IDecl; | ||||||
16012 | } | ||||||
16013 | |||||||
16014 | void Sema::ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagD, | ||||||
16015 | SourceLocation FinalLoc, | ||||||
16016 | bool IsFinalSpelledSealed, | ||||||
16017 | SourceLocation LBraceLoc) { | ||||||
16018 | AdjustDeclIfTemplate(TagD); | ||||||
16019 | CXXRecordDecl *Record = cast<CXXRecordDecl>(TagD); | ||||||
16020 | |||||||
16021 | FieldCollector->StartClass(); | ||||||
16022 | |||||||
16023 | if (!Record->getIdentifier()) | ||||||
16024 | return; | ||||||
16025 | |||||||
16026 | if (FinalLoc.isValid()) | ||||||
16027 | Record->addAttr(FinalAttr::Create( | ||||||
16028 | Context, FinalLoc, AttributeCommonInfo::AS_Keyword, | ||||||
16029 | static_cast<FinalAttr::Spelling>(IsFinalSpelledSealed))); | ||||||
16030 | |||||||
16031 | // C++ [class]p2: | ||||||
16032 | // [...] The class-name is also inserted into the scope of the | ||||||
16033 | // class itself; this is known as the injected-class-name. For | ||||||
16034 | // purposes of access checking, the injected-class-name is treated | ||||||
16035 | // as if it were a public member name. | ||||||
16036 | CXXRecordDecl *InjectedClassName = CXXRecordDecl::Create( | ||||||
16037 | Context, Record->getTagKind(), CurContext, Record->getBeginLoc(), | ||||||
16038 | Record->getLocation(), Record->getIdentifier(), | ||||||
16039 | /*PrevDecl=*/nullptr, | ||||||
16040 | /*DelayTypeCreation=*/true); | ||||||
16041 | Context.getTypeDeclType(InjectedClassName, Record); | ||||||
16042 | InjectedClassName->setImplicit(); | ||||||
16043 | InjectedClassName->setAccess(AS_public); | ||||||
16044 | if (ClassTemplateDecl *Template = Record->getDescribedClassTemplate()) | ||||||
16045 | InjectedClassName->setDescribedClassTemplate(Template); | ||||||
16046 | PushOnScopeChains(InjectedClassName, S); | ||||||
16047 | assert(InjectedClassName->isInjectedClassName() &&((InjectedClassName->isInjectedClassName() && "Broken injected-class-name" ) ? static_cast<void> (0) : __assert_fail ("InjectedClassName->isInjectedClassName() && \"Broken injected-class-name\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 16048, __PRETTY_FUNCTION__)) | ||||||
16048 | "Broken injected-class-name")((InjectedClassName->isInjectedClassName() && "Broken injected-class-name" ) ? static_cast<void> (0) : __assert_fail ("InjectedClassName->isInjectedClassName() && \"Broken injected-class-name\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 16048, __PRETTY_FUNCTION__)); | ||||||
16049 | } | ||||||
16050 | |||||||
16051 | void Sema::ActOnTagFinishDefinition(Scope *S, Decl *TagD, | ||||||
16052 | SourceRange BraceRange) { | ||||||
16053 | AdjustDeclIfTemplate(TagD); | ||||||
16054 | TagDecl *Tag = cast<TagDecl>(TagD); | ||||||
16055 | Tag->setBraceRange(BraceRange); | ||||||
16056 | |||||||
16057 | // Make sure we "complete" the definition even it is invalid. | ||||||
16058 | if (Tag->isBeingDefined()) { | ||||||
16059 | assert(Tag->isInvalidDecl() && "We should already have completed it")((Tag->isInvalidDecl() && "We should already have completed it" ) ? static_cast<void> (0) : __assert_fail ("Tag->isInvalidDecl() && \"We should already have completed it\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 16059, __PRETTY_FUNCTION__)); | ||||||
16060 | if (RecordDecl *RD = dyn_cast<RecordDecl>(Tag)) | ||||||
16061 | RD->completeDefinition(); | ||||||
16062 | } | ||||||
16063 | |||||||
16064 | if (isa<CXXRecordDecl>(Tag)) { | ||||||
16065 | FieldCollector->FinishClass(); | ||||||
16066 | } | ||||||
16067 | |||||||
16068 | // Exit this scope of this tag's definition. | ||||||
16069 | PopDeclContext(); | ||||||
16070 | |||||||
16071 | if (getCurLexicalContext()->isObjCContainer() && | ||||||
16072 | Tag->getDeclContext()->isFileContext()) | ||||||
16073 | Tag->setTopLevelDeclInObjCContainer(); | ||||||
16074 | |||||||
16075 | // Notify the consumer that we've defined a tag. | ||||||
16076 | if (!Tag->isInvalidDecl()) | ||||||
16077 | Consumer.HandleTagDeclDefinition(Tag); | ||||||
16078 | } | ||||||
16079 | |||||||
16080 | void Sema::ActOnObjCContainerFinishDefinition() { | ||||||
16081 | // Exit this scope of this interface definition. | ||||||
16082 | PopDeclContext(); | ||||||
16083 | } | ||||||
16084 | |||||||
16085 | void Sema::ActOnObjCTemporaryExitContainerContext(DeclContext *DC) { | ||||||
16086 | assert(DC == CurContext && "Mismatch of container contexts")((DC == CurContext && "Mismatch of container contexts" ) ? static_cast<void> (0) : __assert_fail ("DC == CurContext && \"Mismatch of container contexts\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 16086, __PRETTY_FUNCTION__)); | ||||||
16087 | OriginalLexicalContext = DC; | ||||||
16088 | ActOnObjCContainerFinishDefinition(); | ||||||
16089 | } | ||||||
16090 | |||||||
16091 | void Sema::ActOnObjCReenterContainerContext(DeclContext *DC) { | ||||||
16092 | ActOnObjCContainerStartDefinition(cast<Decl>(DC)); | ||||||
16093 | OriginalLexicalContext = nullptr; | ||||||
16094 | } | ||||||
16095 | |||||||
16096 | void Sema::ActOnTagDefinitionError(Scope *S, Decl *TagD) { | ||||||
16097 | AdjustDeclIfTemplate(TagD); | ||||||
16098 | TagDecl *Tag = cast<TagDecl>(TagD); | ||||||
16099 | Tag->setInvalidDecl(); | ||||||
16100 | |||||||
16101 | // Make sure we "complete" the definition even it is invalid. | ||||||
16102 | if (Tag->isBeingDefined()) { | ||||||
16103 | if (RecordDecl *RD = dyn_cast<RecordDecl>(Tag)) | ||||||
16104 | RD->completeDefinition(); | ||||||
16105 | } | ||||||
16106 | |||||||
16107 | // We're undoing ActOnTagStartDefinition here, not | ||||||
16108 | // ActOnStartCXXMemberDeclarations, so we don't have to mess with | ||||||
16109 | // the FieldCollector. | ||||||
16110 | |||||||
16111 | PopDeclContext(); | ||||||
16112 | } | ||||||
16113 | |||||||
16114 | // Note that FieldName may be null for anonymous bitfields. | ||||||
16115 | ExprResult Sema::VerifyBitField(SourceLocation FieldLoc, | ||||||
16116 | IdentifierInfo *FieldName, | ||||||
16117 | QualType FieldTy, bool IsMsStruct, | ||||||
16118 | Expr *BitWidth, bool *ZeroWidth) { | ||||||
16119 | // Default to true; that shouldn't confuse checks for emptiness | ||||||
16120 | if (ZeroWidth) | ||||||
16121 | *ZeroWidth = true; | ||||||
16122 | |||||||
16123 | // C99 6.7.2.1p4 - verify the field type. | ||||||
16124 | // C++ 9.6p3: A bit-field shall have integral or enumeration type. | ||||||
16125 | if (!FieldTy->isDependentType() && !FieldTy->isIntegralOrEnumerationType()) { | ||||||
16126 | // Handle incomplete types with specific error. | ||||||
16127 | if (RequireCompleteType(FieldLoc, FieldTy, diag::err_field_incomplete)) | ||||||
16128 | return ExprError(); | ||||||
16129 | if (FieldName) | ||||||
16130 | return Diag(FieldLoc, diag::err_not_integral_type_bitfield) | ||||||
16131 | << FieldName << FieldTy << BitWidth->getSourceRange(); | ||||||
16132 | return Diag(FieldLoc, diag::err_not_integral_type_anon_bitfield) | ||||||
16133 | << FieldTy << BitWidth->getSourceRange(); | ||||||
16134 | } else if (DiagnoseUnexpandedParameterPack(const_cast<Expr *>(BitWidth), | ||||||
16135 | UPPC_BitFieldWidth)) | ||||||
16136 | return ExprError(); | ||||||
16137 | |||||||
16138 | // If the bit-width is type- or value-dependent, don't try to check | ||||||
16139 | // it now. | ||||||
16140 | if (BitWidth->isValueDependent() || BitWidth->isTypeDependent()) | ||||||
16141 | return BitWidth; | ||||||
16142 | |||||||
16143 | llvm::APSInt Value; | ||||||
16144 | ExprResult ICE = VerifyIntegerConstantExpression(BitWidth, &Value); | ||||||
16145 | if (ICE.isInvalid()) | ||||||
16146 | return ICE; | ||||||
16147 | BitWidth = ICE.get(); | ||||||
16148 | |||||||
16149 | if (Value != 0 && ZeroWidth) | ||||||
16150 | *ZeroWidth = false; | ||||||
16151 | |||||||
16152 | // Zero-width bitfield is ok for anonymous field. | ||||||
16153 | if (Value == 0 && FieldName) | ||||||
16154 | return Diag(FieldLoc, diag::err_bitfield_has_zero_width) << FieldName; | ||||||
16155 | |||||||
16156 | if (Value.isSigned() && Value.isNegative()) { | ||||||
16157 | if (FieldName) | ||||||
16158 | return Diag(FieldLoc, diag::err_bitfield_has_negative_width) | ||||||
16159 | << FieldName << Value.toString(10); | ||||||
16160 | return Diag(FieldLoc, diag::err_anon_bitfield_has_negative_width) | ||||||
16161 | << Value.toString(10); | ||||||
16162 | } | ||||||
16163 | |||||||
16164 | if (!FieldTy->isDependentType()) { | ||||||
16165 | uint64_t TypeStorageSize = Context.getTypeSize(FieldTy); | ||||||
16166 | uint64_t TypeWidth = Context.getIntWidth(FieldTy); | ||||||
16167 | bool BitfieldIsOverwide = Value.ugt(TypeWidth); | ||||||
16168 | |||||||
16169 | // Over-wide bitfields are an error in C or when using the MSVC bitfield | ||||||
16170 | // ABI. | ||||||
16171 | bool CStdConstraintViolation = | ||||||
16172 | BitfieldIsOverwide && !getLangOpts().CPlusPlus; | ||||||
16173 | bool MSBitfieldViolation = | ||||||
16174 | Value.ugt(TypeStorageSize) && | ||||||
16175 | (IsMsStruct || Context.getTargetInfo().getCXXABI().isMicrosoft()); | ||||||
16176 | if (CStdConstraintViolation || MSBitfieldViolation) { | ||||||
16177 | unsigned DiagWidth = | ||||||
16178 | CStdConstraintViolation ? TypeWidth : TypeStorageSize; | ||||||
16179 | if (FieldName) | ||||||
16180 | return Diag(FieldLoc, diag::err_bitfield_width_exceeds_type_width) | ||||||
16181 | << FieldName << (unsigned)Value.getZExtValue() | ||||||
16182 | << !CStdConstraintViolation << DiagWidth; | ||||||
16183 | |||||||
16184 | return Diag(FieldLoc, diag::err_anon_bitfield_width_exceeds_type_width) | ||||||
16185 | << (unsigned)Value.getZExtValue() << !CStdConstraintViolation | ||||||
16186 | << DiagWidth; | ||||||
16187 | } | ||||||
16188 | |||||||
16189 | // Warn on types where the user might conceivably expect to get all | ||||||
16190 | // specified bits as value bits: that's all integral types other than | ||||||
16191 | // 'bool'. | ||||||
16192 | if (BitfieldIsOverwide && !FieldTy->isBooleanType()) { | ||||||
16193 | if (FieldName) | ||||||
16194 | Diag(FieldLoc, diag::warn_bitfield_width_exceeds_type_width) | ||||||
16195 | << FieldName << (unsigned)Value.getZExtValue() | ||||||
16196 | << (unsigned)TypeWidth; | ||||||
16197 | else | ||||||
16198 | Diag(FieldLoc, diag::warn_anon_bitfield_width_exceeds_type_width) | ||||||
16199 | << (unsigned)Value.getZExtValue() << (unsigned)TypeWidth; | ||||||
16200 | } | ||||||
16201 | } | ||||||
16202 | |||||||
16203 | return BitWidth; | ||||||
16204 | } | ||||||
16205 | |||||||
16206 | /// ActOnField - Each field of a C struct/union is passed into this in order | ||||||
16207 | /// to create a FieldDecl object for it. | ||||||
16208 | Decl *Sema::ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, | ||||||
16209 | Declarator &D, Expr *BitfieldWidth) { | ||||||
16210 | FieldDecl *Res = HandleField(S, cast_or_null<RecordDecl>(TagD), | ||||||
| |||||||
16211 | DeclStart, D, static_cast<Expr*>(BitfieldWidth), | ||||||
16212 | /*InitStyle=*/ICIS_NoInit, AS_public); | ||||||
16213 | return Res; | ||||||
16214 | } | ||||||
16215 | |||||||
16216 | /// HandleField - Analyze a field of a C struct or a C++ data member. | ||||||
16217 | /// | ||||||
16218 | FieldDecl *Sema::HandleField(Scope *S, RecordDecl *Record, | ||||||
16219 | SourceLocation DeclStart, | ||||||
16220 | Declarator &D, Expr *BitWidth, | ||||||
16221 | InClassInitStyle InitStyle, | ||||||
16222 | AccessSpecifier AS) { | ||||||
16223 | if (D.isDecompositionDeclarator()) { | ||||||
16224 | const DecompositionDeclarator &Decomp = D.getDecompositionDeclarator(); | ||||||
16225 | Diag(Decomp.getLSquareLoc(), diag::err_decomp_decl_context) | ||||||
16226 | << Decomp.getSourceRange(); | ||||||
16227 | return nullptr; | ||||||
16228 | } | ||||||
16229 | |||||||
16230 | IdentifierInfo *II = D.getIdentifier(); | ||||||
16231 | SourceLocation Loc = DeclStart; | ||||||
16232 | if (II
| ||||||
16233 | |||||||
16234 | TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S); | ||||||
16235 | QualType T = TInfo->getType(); | ||||||
16236 | if (getLangOpts().CPlusPlus) { | ||||||
16237 | CheckExtraCXXDefaultArguments(D); | ||||||
16238 | |||||||
16239 | if (DiagnoseUnexpandedParameterPack(D.getIdentifierLoc(), TInfo, | ||||||
16240 | UPPC_DataMemberType)) { | ||||||
16241 | D.setInvalidType(); | ||||||
16242 | T = Context.IntTy; | ||||||
16243 | TInfo = Context.getTrivialTypeSourceInfo(T, Loc); | ||||||
16244 | } | ||||||
16245 | } | ||||||
16246 | |||||||
16247 | DiagnoseFunctionSpecifiers(D.getDeclSpec()); | ||||||
16248 | |||||||
16249 | if (D.getDeclSpec().isInlineSpecified()) | ||||||
16250 | Diag(D.getDeclSpec().getInlineSpecLoc(), diag::err_inline_non_function) | ||||||
16251 | << getLangOpts().CPlusPlus17; | ||||||
16252 | if (DeclSpec::TSCS TSCS = D.getDeclSpec().getThreadStorageClassSpec()) | ||||||
16253 | Diag(D.getDeclSpec().getThreadStorageClassSpecLoc(), | ||||||
16254 | diag::err_invalid_thread) | ||||||
16255 | << DeclSpec::getSpecifierName(TSCS); | ||||||
16256 | |||||||
16257 | // Check to see if this name was declared as a member previously | ||||||
16258 | NamedDecl *PrevDecl = nullptr; | ||||||
16259 | LookupResult Previous(*this, II, Loc, LookupMemberName, | ||||||
16260 | ForVisibleRedeclaration); | ||||||
16261 | LookupName(Previous, S); | ||||||
16262 | switch (Previous.getResultKind()) { | ||||||
16263 | case LookupResult::Found: | ||||||
16264 | case LookupResult::FoundUnresolvedValue: | ||||||
16265 | PrevDecl = Previous.getAsSingle<NamedDecl>(); | ||||||
16266 | break; | ||||||
16267 | |||||||
16268 | case LookupResult::FoundOverloaded: | ||||||
16269 | PrevDecl = Previous.getRepresentativeDecl(); | ||||||
16270 | break; | ||||||
16271 | |||||||
16272 | case LookupResult::NotFound: | ||||||
16273 | case LookupResult::NotFoundInCurrentInstantiation: | ||||||
16274 | case LookupResult::Ambiguous: | ||||||
16275 | break; | ||||||
16276 | } | ||||||
16277 | Previous.suppressDiagnostics(); | ||||||
16278 | |||||||
16279 | if (PrevDecl
| ||||||
16280 | // Maybe we will complain about the shadowed template parameter. | ||||||
16281 | DiagnoseTemplateParameterShadow(D.getIdentifierLoc(), PrevDecl); | ||||||
16282 | // Just pretend that we didn't see the previous declaration. | ||||||
16283 | PrevDecl = nullptr; | ||||||
16284 | } | ||||||
16285 | |||||||
16286 | if (PrevDecl
| ||||||
16287 | PrevDecl = nullptr; | ||||||
16288 | |||||||
16289 | bool Mutable | ||||||
16290 | = (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_mutable); | ||||||
16291 | SourceLocation TSSL = D.getBeginLoc(); | ||||||
16292 | FieldDecl *NewFD | ||||||
16293 | = CheckFieldDecl(II, T, TInfo, Record, Loc, Mutable, BitWidth, InitStyle, | ||||||
16294 | TSSL, AS, PrevDecl, &D); | ||||||
16295 | |||||||
16296 | if (NewFD->isInvalidDecl()) | ||||||
16297 | Record->setInvalidDecl(); | ||||||
16298 | |||||||
16299 | if (D.getDeclSpec().isModulePrivateSpecified()) | ||||||
16300 | NewFD->setModulePrivate(); | ||||||
16301 | |||||||
16302 | if (NewFD->isInvalidDecl() && PrevDecl) { | ||||||
16303 | // Don't introduce NewFD into scope; there's already something | ||||||
16304 | // with the same name in the same scope. | ||||||
16305 | } else if (II) { | ||||||
16306 | PushOnScopeChains(NewFD, S); | ||||||
16307 | } else | ||||||
16308 | Record->addDecl(NewFD); | ||||||
16309 | |||||||
16310 | return NewFD; | ||||||
16311 | } | ||||||
16312 | |||||||
16313 | /// Build a new FieldDecl and check its well-formedness. | ||||||
16314 | /// | ||||||
16315 | /// This routine builds a new FieldDecl given the fields name, type, | ||||||
16316 | /// record, etc. \p PrevDecl should refer to any previous declaration | ||||||
16317 | /// with the same name and in the same scope as the field to be | ||||||
16318 | /// created. | ||||||
16319 | /// | ||||||
16320 | /// \returns a new FieldDecl. | ||||||
16321 | /// | ||||||
16322 | /// \todo The Declarator argument is a hack. It will be removed once | ||||||
16323 | FieldDecl *Sema::CheckFieldDecl(DeclarationName Name, QualType T, | ||||||
16324 | TypeSourceInfo *TInfo, | ||||||
16325 | RecordDecl *Record, SourceLocation Loc, | ||||||
16326 | bool Mutable, Expr *BitWidth, | ||||||
16327 | InClassInitStyle InitStyle, | ||||||
16328 | SourceLocation TSSL, | ||||||
16329 | AccessSpecifier AS, NamedDecl *PrevDecl, | ||||||
16330 | Declarator *D) { | ||||||
16331 | IdentifierInfo *II = Name.getAsIdentifierInfo(); | ||||||
16332 | bool InvalidDecl = false; | ||||||
16333 | if (D
| ||||||
16334 | |||||||
16335 | // If we receive a broken type, recover by assuming 'int' and | ||||||
16336 | // marking this declaration as invalid. | ||||||
16337 | if (T.isNull()) { | ||||||
16338 | InvalidDecl = true; | ||||||
16339 | T = Context.IntTy; | ||||||
16340 | } | ||||||
16341 | |||||||
16342 | QualType EltTy = Context.getBaseElementType(T); | ||||||
16343 | if (!EltTy->isDependentType()) { | ||||||
16344 | if (RequireCompleteType(Loc, EltTy, diag::err_field_incomplete)) { | ||||||
16345 | // Fields of incomplete type force their record to be invalid. | ||||||
16346 | Record->setInvalidDecl(); | ||||||
| |||||||
16347 | InvalidDecl = true; | ||||||
16348 | } else { | ||||||
16349 | NamedDecl *Def; | ||||||
16350 | EltTy->isIncompleteType(&Def); | ||||||
16351 | if (Def && Def->isInvalidDecl()) { | ||||||
16352 | Record->setInvalidDecl(); | ||||||
16353 | InvalidDecl = true; | ||||||
16354 | } | ||||||
16355 | } | ||||||
16356 | } | ||||||
16357 | |||||||
16358 | // TR 18037 does not allow fields to be declared with address space | ||||||
16359 | if (T.hasAddressSpace() || T->isDependentAddressSpaceType() || | ||||||
16360 | T->getBaseElementTypeUnsafe()->isDependentAddressSpaceType()) { | ||||||
16361 | Diag(Loc, diag::err_field_with_address_space); | ||||||
16362 | Record->setInvalidDecl(); | ||||||
16363 | InvalidDecl = true; | ||||||
16364 | } | ||||||
16365 | |||||||
16366 | if (LangOpts.OpenCL) { | ||||||
16367 | // OpenCL v1.2 s6.9b,r & OpenCL v2.0 s6.12.5 - The following types cannot be | ||||||
16368 | // used as structure or union field: image, sampler, event or block types. | ||||||
16369 | if (T->isEventT() || T->isImageType() || T->isSamplerT() || | ||||||
16370 | T->isBlockPointerType()) { | ||||||
16371 | Diag(Loc, diag::err_opencl_type_struct_or_union_field) << T; | ||||||
16372 | Record->setInvalidDecl(); | ||||||
16373 | InvalidDecl = true; | ||||||
16374 | } | ||||||
16375 | // OpenCL v1.2 s6.9.c: bitfields are not supported. | ||||||
16376 | if (BitWidth) { | ||||||
16377 | Diag(Loc, diag::err_opencl_bitfields); | ||||||
16378 | InvalidDecl = true; | ||||||
16379 | } | ||||||
16380 | } | ||||||
16381 | |||||||
16382 | // Anonymous bit-fields cannot be cv-qualified (CWG 2229). | ||||||
16383 | if (!InvalidDecl && getLangOpts().CPlusPlus && !II && BitWidth && | ||||||
16384 | T.hasQualifiers()) { | ||||||
16385 | InvalidDecl = true; | ||||||
16386 | Diag(Loc, diag::err_anon_bitfield_qualifiers); | ||||||
16387 | } | ||||||
16388 | |||||||
16389 | // C99 6.7.2.1p8: A member of a structure or union may have any type other | ||||||
16390 | // than a variably modified type. | ||||||
16391 | if (!InvalidDecl && T->isVariablyModifiedType()) { | ||||||
16392 | bool SizeIsNegative; | ||||||
16393 | llvm::APSInt Oversized; | ||||||
16394 | |||||||
16395 | TypeSourceInfo *FixedTInfo = | ||||||
16396 | TryToFixInvalidVariablyModifiedTypeSourceInfo(TInfo, Context, | ||||||
16397 | SizeIsNegative, | ||||||
16398 | Oversized); | ||||||
16399 | if (FixedTInfo) { | ||||||
16400 | Diag(Loc, diag::warn_illegal_constant_array_size); | ||||||
16401 | TInfo = FixedTInfo; | ||||||
16402 | T = FixedTInfo->getType(); | ||||||
16403 | } else { | ||||||
16404 | if (SizeIsNegative) | ||||||
16405 | Diag(Loc, diag::err_typecheck_negative_array_size); | ||||||
16406 | else if (Oversized.getBoolValue()) | ||||||
16407 | Diag(Loc, diag::err_array_too_large) | ||||||
16408 | << Oversized.toString(10); | ||||||
16409 | else | ||||||
16410 | Diag(Loc, diag::err_typecheck_field_variable_size); | ||||||
16411 | InvalidDecl = true; | ||||||
16412 | } | ||||||
16413 | } | ||||||
16414 | |||||||
16415 | // Fields can not have abstract class types | ||||||
16416 | if (!InvalidDecl && RequireNonAbstractType(Loc, T, | ||||||
16417 | diag::err_abstract_type_in_decl, | ||||||
16418 | AbstractFieldType)) | ||||||
16419 | InvalidDecl = true; | ||||||
16420 | |||||||
16421 | bool ZeroWidth = false; | ||||||
16422 | if (InvalidDecl) | ||||||
16423 | BitWidth = nullptr; | ||||||
16424 | // If this is declared as a bit-field, check the bit-field. | ||||||
16425 | if (BitWidth) { | ||||||
16426 | BitWidth = VerifyBitField(Loc, II, T, Record->isMsStruct(Context), BitWidth, | ||||||
16427 | &ZeroWidth).get(); | ||||||
16428 | if (!BitWidth) { | ||||||
16429 | InvalidDecl = true; | ||||||
16430 | BitWidth = nullptr; | ||||||
16431 | ZeroWidth = false; | ||||||
16432 | } | ||||||
16433 | } | ||||||
16434 | |||||||
16435 | // Check that 'mutable' is consistent with the type of the declaration. | ||||||
16436 | if (!InvalidDecl && Mutable) { | ||||||
16437 | unsigned DiagID = 0; | ||||||
16438 | if (T->isReferenceType()) | ||||||
16439 | DiagID = getLangOpts().MSVCCompat ? diag::ext_mutable_reference | ||||||
16440 | : diag::err_mutable_reference; | ||||||
16441 | else if (T.isConstQualified()) | ||||||
16442 | DiagID = diag::err_mutable_const; | ||||||
16443 | |||||||
16444 | if (DiagID) { | ||||||
16445 | SourceLocation ErrLoc = Loc; | ||||||
16446 | if (D && D->getDeclSpec().getStorageClassSpecLoc().isValid()) | ||||||
16447 | ErrLoc = D->getDeclSpec().getStorageClassSpecLoc(); | ||||||
16448 | Diag(ErrLoc, DiagID); | ||||||
16449 | if (DiagID != diag::ext_mutable_reference) { | ||||||
16450 | Mutable = false; | ||||||
16451 | InvalidDecl = true; | ||||||
16452 | } | ||||||
16453 | } | ||||||
16454 | } | ||||||
16455 | |||||||
16456 | // C++11 [class.union]p8 (DR1460): | ||||||
16457 | // At most one variant member of a union may have a | ||||||
16458 | // brace-or-equal-initializer. | ||||||
16459 | if (InitStyle != ICIS_NoInit) | ||||||
16460 | checkDuplicateDefaultInit(*this, cast<CXXRecordDecl>(Record), Loc); | ||||||
16461 | |||||||
16462 | FieldDecl *NewFD = FieldDecl::Create(Context, Record, TSSL, Loc, II, T, TInfo, | ||||||
16463 | BitWidth, Mutable, InitStyle); | ||||||
16464 | if (InvalidDecl) | ||||||
16465 | NewFD->setInvalidDecl(); | ||||||
16466 | |||||||
16467 | if (PrevDecl && !isa<TagDecl>(PrevDecl)) { | ||||||
16468 | Diag(Loc, diag::err_duplicate_member) << II; | ||||||
16469 | Diag(PrevDecl->getLocation(), diag::note_previous_declaration); | ||||||
16470 | NewFD->setInvalidDecl(); | ||||||
16471 | } | ||||||
16472 | |||||||
16473 | if (!InvalidDecl && getLangOpts().CPlusPlus) { | ||||||
16474 | if (Record->isUnion()) { | ||||||
16475 | if (const RecordType *RT = EltTy->getAs<RecordType>()) { | ||||||
16476 | CXXRecordDecl* RDecl = cast<CXXRecordDecl>(RT->getDecl()); | ||||||
16477 | if (RDecl->getDefinition()) { | ||||||
16478 | // C++ [class.union]p1: An object of a class with a non-trivial | ||||||
16479 | // constructor, a non-trivial copy constructor, a non-trivial | ||||||
16480 | // destructor, or a non-trivial copy assignment operator | ||||||
16481 | // cannot be a member of a union, nor can an array of such | ||||||
16482 | // objects. | ||||||
16483 | if (CheckNontrivialField(NewFD)) | ||||||
16484 | NewFD->setInvalidDecl(); | ||||||
16485 | } | ||||||
16486 | } | ||||||
16487 | |||||||
16488 | // C++ [class.union]p1: If a union contains a member of reference type, | ||||||
16489 | // the program is ill-formed, except when compiling with MSVC extensions | ||||||
16490 | // enabled. | ||||||
16491 | if (EltTy->isReferenceType()) { | ||||||
16492 | Diag(NewFD->getLocation(), getLangOpts().MicrosoftExt ? | ||||||
16493 | diag::ext_union_member_of_reference_type : | ||||||
16494 | diag::err_union_member_of_reference_type) | ||||||
16495 | << NewFD->getDeclName() << EltTy; | ||||||
16496 | if (!getLangOpts().MicrosoftExt) | ||||||
16497 | NewFD->setInvalidDecl(); | ||||||
16498 | } | ||||||
16499 | } | ||||||
16500 | } | ||||||
16501 | |||||||
16502 | // FIXME: We need to pass in the attributes given an AST | ||||||
16503 | // representation, not a parser representation. | ||||||
16504 | if (D) { | ||||||
16505 | // FIXME: The current scope is almost... but not entirely... correct here. | ||||||
16506 | ProcessDeclAttributes(getCurScope(), NewFD, *D); | ||||||
16507 | |||||||
16508 | if (NewFD->hasAttrs()) | ||||||
16509 | CheckAlignasUnderalignment(NewFD); | ||||||
16510 | } | ||||||
16511 | |||||||
16512 | // In auto-retain/release, infer strong retension for fields of | ||||||
16513 | // retainable type. | ||||||
16514 | if (getLangOpts().ObjCAutoRefCount && inferObjCARCLifetime(NewFD)) | ||||||
16515 | NewFD->setInvalidDecl(); | ||||||
16516 | |||||||
16517 | if (T.isObjCGCWeak()) | ||||||
16518 | Diag(Loc, diag::warn_attribute_weak_on_field); | ||||||
16519 | |||||||
16520 | NewFD->setAccess(AS); | ||||||
16521 | return NewFD; | ||||||
16522 | } | ||||||
16523 | |||||||
16524 | bool Sema::CheckNontrivialField(FieldDecl *FD) { | ||||||
16525 | assert(FD)((FD) ? static_cast<void> (0) : __assert_fail ("FD", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 16525, __PRETTY_FUNCTION__)); | ||||||
16526 | assert(getLangOpts().CPlusPlus && "valid check only for C++")((getLangOpts().CPlusPlus && "valid check only for C++" ) ? static_cast<void> (0) : __assert_fail ("getLangOpts().CPlusPlus && \"valid check only for C++\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 16526, __PRETTY_FUNCTION__)); | ||||||
16527 | |||||||
16528 | if (FD->isInvalidDecl() || FD->getType()->isDependentType()) | ||||||
16529 | return false; | ||||||
16530 | |||||||
16531 | QualType EltTy = Context.getBaseElementType(FD->getType()); | ||||||
16532 | if (const RecordType *RT = EltTy->getAs<RecordType>()) { | ||||||
16533 | CXXRecordDecl *RDecl = cast<CXXRecordDecl>(RT->getDecl()); | ||||||
16534 | if (RDecl->getDefinition()) { | ||||||
16535 | // We check for copy constructors before constructors | ||||||
16536 | // because otherwise we'll never get complaints about | ||||||
16537 | // copy constructors. | ||||||
16538 | |||||||
16539 | CXXSpecialMember member = CXXInvalid; | ||||||
16540 | // We're required to check for any non-trivial constructors. Since the | ||||||
16541 | // implicit default constructor is suppressed if there are any | ||||||
16542 | // user-declared constructors, we just need to check that there is a | ||||||
16543 | // trivial default constructor and a trivial copy constructor. (We don't | ||||||
16544 | // worry about move constructors here, since this is a C++98 check.) | ||||||
16545 | if (RDecl->hasNonTrivialCopyConstructor()) | ||||||
16546 | member = CXXCopyConstructor; | ||||||
16547 | else if (!RDecl->hasTrivialDefaultConstructor()) | ||||||
16548 | member = CXXDefaultConstructor; | ||||||
16549 | else if (RDecl->hasNonTrivialCopyAssignment()) | ||||||
16550 | member = CXXCopyAssignment; | ||||||
16551 | else if (RDecl->hasNonTrivialDestructor()) | ||||||
16552 | member = CXXDestructor; | ||||||
16553 | |||||||
16554 | if (member != CXXInvalid) { | ||||||
16555 | if (!getLangOpts().CPlusPlus11 && | ||||||
16556 | getLangOpts().ObjCAutoRefCount && RDecl->hasObjectMember()) { | ||||||
16557 | // Objective-C++ ARC: it is an error to have a non-trivial field of | ||||||
16558 | // a union. However, system headers in Objective-C programs | ||||||
16559 | // occasionally have Objective-C lifetime objects within unions, | ||||||
16560 | // and rather than cause the program to fail, we make those | ||||||
16561 | // members unavailable. | ||||||
16562 | SourceLocation Loc = FD->getLocation(); | ||||||
16563 | if (getSourceManager().isInSystemHeader(Loc)) { | ||||||
16564 | if (!FD->hasAttr<UnavailableAttr>()) | ||||||
16565 | FD->addAttr(UnavailableAttr::CreateImplicit(Context, "", | ||||||
16566 | UnavailableAttr::IR_ARCFieldWithOwnership, Loc)); | ||||||
16567 | return false; | ||||||
16568 | } | ||||||
16569 | } | ||||||
16570 | |||||||
16571 | Diag(FD->getLocation(), getLangOpts().CPlusPlus11 ? | ||||||
16572 | diag::warn_cxx98_compat_nontrivial_union_or_anon_struct_member : | ||||||
16573 | diag::err_illegal_union_or_anon_struct_member) | ||||||
16574 | << FD->getParent()->isUnion() << FD->getDeclName() << member; | ||||||
16575 | DiagnoseNontrivial(RDecl, member); | ||||||
16576 | return !getLangOpts().CPlusPlus11; | ||||||
16577 | } | ||||||
16578 | } | ||||||
16579 | } | ||||||
16580 | |||||||
16581 | return false; | ||||||
16582 | } | ||||||
16583 | |||||||
16584 | /// TranslateIvarVisibility - Translate visibility from a token ID to an | ||||||
16585 | /// AST enum value. | ||||||
16586 | static ObjCIvarDecl::AccessControl | ||||||
16587 | TranslateIvarVisibility(tok::ObjCKeywordKind ivarVisibility) { | ||||||
16588 | switch (ivarVisibility) { | ||||||
16589 | default: llvm_unreachable("Unknown visitibility kind")::llvm::llvm_unreachable_internal("Unknown visitibility kind" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 16589); | ||||||
16590 | case tok::objc_private: return ObjCIvarDecl::Private; | ||||||
16591 | case tok::objc_public: return ObjCIvarDecl::Public; | ||||||
16592 | case tok::objc_protected: return ObjCIvarDecl::Protected; | ||||||
16593 | case tok::objc_package: return ObjCIvarDecl::Package; | ||||||
16594 | } | ||||||
16595 | } | ||||||
16596 | |||||||
16597 | /// ActOnIvar - Each ivar field of an objective-c class is passed into this | ||||||
16598 | /// in order to create an IvarDecl object for it. | ||||||
16599 | Decl *Sema::ActOnIvar(Scope *S, | ||||||
16600 | SourceLocation DeclStart, | ||||||
16601 | Declarator &D, Expr *BitfieldWidth, | ||||||
16602 | tok::ObjCKeywordKind Visibility) { | ||||||
16603 | |||||||
16604 | IdentifierInfo *II = D.getIdentifier(); | ||||||
16605 | Expr *BitWidth = (Expr*)BitfieldWidth; | ||||||
16606 | SourceLocation Loc = DeclStart; | ||||||
16607 | if (II) Loc = D.getIdentifierLoc(); | ||||||
16608 | |||||||
16609 | // FIXME: Unnamed fields can be handled in various different ways, for | ||||||
16610 | // example, unnamed unions inject all members into the struct namespace! | ||||||
16611 | |||||||
16612 | TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S); | ||||||
16613 | QualType T = TInfo->getType(); | ||||||
16614 | |||||||
16615 | if (BitWidth) { | ||||||
16616 | // 6.7.2.1p3, 6.7.2.1p4 | ||||||
16617 | BitWidth = VerifyBitField(Loc, II, T, /*IsMsStruct*/false, BitWidth).get(); | ||||||
16618 | if (!BitWidth) | ||||||
16619 | D.setInvalidType(); | ||||||
16620 | } else { | ||||||
16621 | // Not a bitfield. | ||||||
16622 | |||||||
16623 | // validate II. | ||||||
16624 | |||||||
16625 | } | ||||||
16626 | if (T->isReferenceType()) { | ||||||
16627 | Diag(Loc, diag::err_ivar_reference_type); | ||||||
16628 | D.setInvalidType(); | ||||||
16629 | } | ||||||
16630 | // C99 6.7.2.1p8: A member of a structure or union may have any type other | ||||||
16631 | // than a variably modified type. | ||||||
16632 | else if (T->isVariablyModifiedType()) { | ||||||
16633 | Diag(Loc, diag::err_typecheck_ivar_variable_size); | ||||||
16634 | D.setInvalidType(); | ||||||
16635 | } | ||||||
16636 | |||||||
16637 | // Get the visibility (access control) for this ivar. | ||||||
16638 | ObjCIvarDecl::AccessControl ac = | ||||||
16639 | Visibility != tok::objc_not_keyword ? TranslateIvarVisibility(Visibility) | ||||||
16640 | : ObjCIvarDecl::None; | ||||||
16641 | // Must set ivar's DeclContext to its enclosing interface. | ||||||
16642 | ObjCContainerDecl *EnclosingDecl = cast<ObjCContainerDecl>(CurContext); | ||||||
16643 | if (!EnclosingDecl || EnclosingDecl->isInvalidDecl()) | ||||||
16644 | return nullptr; | ||||||
16645 | ObjCContainerDecl *EnclosingContext; | ||||||
16646 | if (ObjCImplementationDecl *IMPDecl = | ||||||
16647 | dyn_cast<ObjCImplementationDecl>(EnclosingDecl)) { | ||||||
16648 | if (LangOpts.ObjCRuntime.isFragile()) { | ||||||
16649 | // Case of ivar declared in an implementation. Context is that of its class. | ||||||
16650 | EnclosingContext = IMPDecl->getClassInterface(); | ||||||
16651 | assert(EnclosingContext && "Implementation has no class interface!")((EnclosingContext && "Implementation has no class interface!" ) ? static_cast<void> (0) : __assert_fail ("EnclosingContext && \"Implementation has no class interface!\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 16651, __PRETTY_FUNCTION__)); | ||||||
16652 | } | ||||||
16653 | else | ||||||
16654 | EnclosingContext = EnclosingDecl; | ||||||
16655 | } else { | ||||||
16656 | if (ObjCCategoryDecl *CDecl = | ||||||
16657 | dyn_cast<ObjCCategoryDecl>(EnclosingDecl)) { | ||||||
16658 | if (LangOpts.ObjCRuntime.isFragile() || !CDecl->IsClassExtension()) { | ||||||
16659 | Diag(Loc, diag::err_misplaced_ivar) << CDecl->IsClassExtension(); | ||||||
16660 | return nullptr; | ||||||
16661 | } | ||||||
16662 | } | ||||||
16663 | EnclosingContext = EnclosingDecl; | ||||||
16664 | } | ||||||
16665 | |||||||
16666 | // Construct the decl. | ||||||
16667 | ObjCIvarDecl *NewID = ObjCIvarDecl::Create(Context, EnclosingContext, | ||||||
16668 | DeclStart, Loc, II, T, | ||||||
16669 | TInfo, ac, (Expr *)BitfieldWidth); | ||||||
16670 | |||||||
16671 | if (II) { | ||||||
16672 | NamedDecl *PrevDecl = LookupSingleName(S, II, Loc, LookupMemberName, | ||||||
16673 | ForVisibleRedeclaration); | ||||||
16674 | if (PrevDecl && isDeclInScope(PrevDecl, EnclosingContext, S) | ||||||
16675 | && !isa<TagDecl>(PrevDecl)) { | ||||||
16676 | Diag(Loc, diag::err_duplicate_member) << II; | ||||||
16677 | Diag(PrevDecl->getLocation(), diag::note_previous_declaration); | ||||||
16678 | NewID->setInvalidDecl(); | ||||||
16679 | } | ||||||
16680 | } | ||||||
16681 | |||||||
16682 | // Process attributes attached to the ivar. | ||||||
16683 | ProcessDeclAttributes(S, NewID, D); | ||||||
16684 | |||||||
16685 | if (D.isInvalidType()) | ||||||
16686 | NewID->setInvalidDecl(); | ||||||
16687 | |||||||
16688 | // In ARC, infer 'retaining' for ivars of retainable type. | ||||||
16689 | if (getLangOpts().ObjCAutoRefCount && inferObjCARCLifetime(NewID)) | ||||||
16690 | NewID->setInvalidDecl(); | ||||||
16691 | |||||||
16692 | if (D.getDeclSpec().isModulePrivateSpecified()) | ||||||
16693 | NewID->setModulePrivate(); | ||||||
16694 | |||||||
16695 | if (II) { | ||||||
16696 | // FIXME: When interfaces are DeclContexts, we'll need to add | ||||||
16697 | // these to the interface. | ||||||
16698 | S->AddDecl(NewID); | ||||||
16699 | IdResolver.AddDecl(NewID); | ||||||
16700 | } | ||||||
16701 | |||||||
16702 | if (LangOpts.ObjCRuntime.isNonFragile() && | ||||||
16703 | !NewID->isInvalidDecl() && isa<ObjCInterfaceDecl>(EnclosingDecl)) | ||||||
16704 | Diag(Loc, diag::warn_ivars_in_interface); | ||||||
16705 | |||||||
16706 | return NewID; | ||||||
16707 | } | ||||||
16708 | |||||||
16709 | /// ActOnLastBitfield - This routine handles synthesized bitfields rules for | ||||||
16710 | /// class and class extensions. For every class \@interface and class | ||||||
16711 | /// extension \@interface, if the last ivar is a bitfield of any type, | ||||||
16712 | /// then add an implicit `char :0` ivar to the end of that interface. | ||||||
16713 | void Sema::ActOnLastBitfield(SourceLocation DeclLoc, | ||||||
16714 | SmallVectorImpl<Decl *> &AllIvarDecls) { | ||||||
16715 | if (LangOpts.ObjCRuntime.isFragile() || AllIvarDecls.empty()) | ||||||
16716 | return; | ||||||
16717 | |||||||
16718 | Decl *ivarDecl = AllIvarDecls[AllIvarDecls.size()-1]; | ||||||
16719 | ObjCIvarDecl *Ivar = cast<ObjCIvarDecl>(ivarDecl); | ||||||
16720 | |||||||
16721 | if (!Ivar->isBitField() || Ivar->isZeroLengthBitField(Context)) | ||||||
16722 | return; | ||||||
16723 | ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(CurContext); | ||||||
16724 | if (!ID) { | ||||||
16725 | if (ObjCCategoryDecl *CD = dyn_cast<ObjCCategoryDecl>(CurContext)) { | ||||||
16726 | if (!CD->IsClassExtension()) | ||||||
16727 | return; | ||||||
16728 | } | ||||||
16729 | // No need to add this to end of @implementation. | ||||||
16730 | else | ||||||
16731 | return; | ||||||
16732 | } | ||||||
16733 | // All conditions are met. Add a new bitfield to the tail end of ivars. | ||||||
16734 | llvm::APInt Zero(Context.getTypeSize(Context.IntTy), 0); | ||||||
16735 | Expr * BW = IntegerLiteral::Create(Context, Zero, Context.IntTy, DeclLoc); | ||||||
16736 | |||||||
16737 | Ivar = ObjCIvarDecl::Create(Context, cast<ObjCContainerDecl>(CurContext), | ||||||
16738 | DeclLoc, DeclLoc, nullptr, | ||||||
16739 | Context.CharTy, | ||||||
16740 | Context.getTrivialTypeSourceInfo(Context.CharTy, | ||||||
16741 | DeclLoc), | ||||||
16742 | ObjCIvarDecl::Private, BW, | ||||||
16743 | true); | ||||||
16744 | AllIvarDecls.push_back(Ivar); | ||||||
16745 | } | ||||||
16746 | |||||||
16747 | void Sema::ActOnFields(Scope *S, SourceLocation RecLoc, Decl *EnclosingDecl, | ||||||
16748 | ArrayRef<Decl *> Fields, SourceLocation LBrac, | ||||||
16749 | SourceLocation RBrac, | ||||||
16750 | const ParsedAttributesView &Attrs) { | ||||||
16751 | assert(EnclosingDecl && "missing record or interface decl")((EnclosingDecl && "missing record or interface decl" ) ? static_cast<void> (0) : __assert_fail ("EnclosingDecl && \"missing record or interface decl\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 16751, __PRETTY_FUNCTION__)); | ||||||
16752 | |||||||
16753 | // If this is an Objective-C @implementation or category and we have | ||||||
16754 | // new fields here we should reset the layout of the interface since | ||||||
16755 | // it will now change. | ||||||
16756 | if (!Fields.empty() && isa<ObjCContainerDecl>(EnclosingDecl)) { | ||||||
16757 | ObjCContainerDecl *DC = cast<ObjCContainerDecl>(EnclosingDecl); | ||||||
16758 | switch (DC->getKind()) { | ||||||
16759 | default: break; | ||||||
16760 | case Decl::ObjCCategory: | ||||||
16761 | Context.ResetObjCLayout(cast<ObjCCategoryDecl>(DC)->getClassInterface()); | ||||||
16762 | break; | ||||||
16763 | case Decl::ObjCImplementation: | ||||||
16764 | Context. | ||||||
16765 | ResetObjCLayout(cast<ObjCImplementationDecl>(DC)->getClassInterface()); | ||||||
16766 | break; | ||||||
16767 | } | ||||||
16768 | } | ||||||
16769 | |||||||
16770 | RecordDecl *Record = dyn_cast<RecordDecl>(EnclosingDecl); | ||||||
16771 | CXXRecordDecl *CXXRecord = dyn_cast<CXXRecordDecl>(EnclosingDecl); | ||||||
16772 | |||||||
16773 | // Start counting up the number of named members; make sure to include | ||||||
16774 | // members of anonymous structs and unions in the total. | ||||||
16775 | unsigned NumNamedMembers = 0; | ||||||
16776 | if (Record) { | ||||||
16777 | for (const auto *I : Record->decls()) { | ||||||
16778 | if (const auto *IFD = dyn_cast<IndirectFieldDecl>(I)) | ||||||
16779 | if (IFD->getDeclName()) | ||||||
16780 | ++NumNamedMembers; | ||||||
16781 | } | ||||||
16782 | } | ||||||
16783 | |||||||
16784 | // Verify that all the fields are okay. | ||||||
16785 | SmallVector<FieldDecl*, 32> RecFields; | ||||||
16786 | |||||||
16787 | for (ArrayRef<Decl *>::iterator i = Fields.begin(), end = Fields.end(); | ||||||
16788 | i != end; ++i) { | ||||||
16789 | FieldDecl *FD = cast<FieldDecl>(*i); | ||||||
16790 | |||||||
16791 | // Get the type for the field. | ||||||
16792 | const Type *FDTy = FD->getType().getTypePtr(); | ||||||
16793 | |||||||
16794 | if (!FD->isAnonymousStructOrUnion()) { | ||||||
16795 | // Remember all fields written by the user. | ||||||
16796 | RecFields.push_back(FD); | ||||||
16797 | } | ||||||
16798 | |||||||
16799 | // If the field is already invalid for some reason, don't emit more | ||||||
16800 | // diagnostics about it. | ||||||
16801 | if (FD->isInvalidDecl()) { | ||||||
16802 | EnclosingDecl->setInvalidDecl(); | ||||||
16803 | continue; | ||||||
16804 | } | ||||||
16805 | |||||||
16806 | // C99 6.7.2.1p2: | ||||||
16807 | // A structure or union shall not contain a member with | ||||||
16808 | // incomplete or function type (hence, a structure shall not | ||||||
16809 | // contain an instance of itself, but may contain a pointer to | ||||||
16810 | // an instance of itself), except that the last member of a | ||||||
16811 | // structure with more than one named member may have incomplete | ||||||
16812 | // array type; such a structure (and any union containing, | ||||||
16813 | // possibly recursively, a member that is such a structure) | ||||||
16814 | // shall not be a member of a structure or an element of an | ||||||
16815 | // array. | ||||||
16816 | bool IsLastField = (i + 1 == Fields.end()); | ||||||
16817 | if (FDTy->isFunctionType()) { | ||||||
16818 | // Field declared as a function. | ||||||
16819 | Diag(FD->getLocation(), diag::err_field_declared_as_function) | ||||||
16820 | << FD->getDeclName(); | ||||||
16821 | FD->setInvalidDecl(); | ||||||
16822 | EnclosingDecl->setInvalidDecl(); | ||||||
16823 | continue; | ||||||
16824 | } else if (FDTy->isIncompleteArrayType() && | ||||||
16825 | (Record || isa<ObjCContainerDecl>(EnclosingDecl))) { | ||||||
16826 | if (Record) { | ||||||
16827 | // Flexible array member. | ||||||
16828 | // Microsoft and g++ is more permissive regarding flexible array. | ||||||
16829 | // It will accept flexible array in union and also | ||||||
16830 | // as the sole element of a struct/class. | ||||||
16831 | unsigned DiagID = 0; | ||||||
16832 | if (!Record->isUnion() && !IsLastField) { | ||||||
16833 | Diag(FD->getLocation(), diag::err_flexible_array_not_at_end) | ||||||
16834 | << FD->getDeclName() << FD->getType() << Record->getTagKind(); | ||||||
16835 | Diag((*(i + 1))->getLocation(), diag::note_next_field_declaration); | ||||||
16836 | FD->setInvalidDecl(); | ||||||
16837 | EnclosingDecl->setInvalidDecl(); | ||||||
16838 | continue; | ||||||
16839 | } else if (Record->isUnion()) | ||||||
16840 | DiagID = getLangOpts().MicrosoftExt | ||||||
16841 | ? diag::ext_flexible_array_union_ms | ||||||
16842 | : getLangOpts().CPlusPlus | ||||||
16843 | ? diag::ext_flexible_array_union_gnu | ||||||
16844 | : diag::err_flexible_array_union; | ||||||
16845 | else if (NumNamedMembers < 1) | ||||||
16846 | DiagID = getLangOpts().MicrosoftExt | ||||||
16847 | ? diag::ext_flexible_array_empty_aggregate_ms | ||||||
16848 | : getLangOpts().CPlusPlus | ||||||
16849 | ? diag::ext_flexible_array_empty_aggregate_gnu | ||||||
16850 | : diag::err_flexible_array_empty_aggregate; | ||||||
16851 | |||||||
16852 | if (DiagID) | ||||||
16853 | Diag(FD->getLocation(), DiagID) << FD->getDeclName() | ||||||
16854 | << Record->getTagKind(); | ||||||
16855 | // While the layout of types that contain virtual bases is not specified | ||||||
16856 | // by the C++ standard, both the Itanium and Microsoft C++ ABIs place | ||||||
16857 | // virtual bases after the derived members. This would make a flexible | ||||||
16858 | // array member declared at the end of an object not adjacent to the end | ||||||
16859 | // of the type. | ||||||
16860 | if (CXXRecord && CXXRecord->getNumVBases() != 0) | ||||||
16861 | Diag(FD->getLocation(), diag::err_flexible_array_virtual_base) | ||||||
16862 | << FD->getDeclName() << Record->getTagKind(); | ||||||
16863 | if (!getLangOpts().C99) | ||||||
16864 | Diag(FD->getLocation(), diag::ext_c99_flexible_array_member) | ||||||
16865 | << FD->getDeclName() << Record->getTagKind(); | ||||||
16866 | |||||||
16867 | // If the element type has a non-trivial destructor, we would not | ||||||
16868 | // implicitly destroy the elements, so disallow it for now. | ||||||
16869 | // | ||||||
16870 | // FIXME: GCC allows this. We should probably either implicitly delete | ||||||
16871 | // the destructor of the containing class, or just allow this. | ||||||
16872 | QualType BaseElem = Context.getBaseElementType(FD->getType()); | ||||||
16873 | if (!BaseElem->isDependentType() && BaseElem.isDestructedType()) { | ||||||
16874 | Diag(FD->getLocation(), diag::err_flexible_array_has_nontrivial_dtor) | ||||||
16875 | << FD->getDeclName() << FD->getType(); | ||||||
16876 | FD->setInvalidDecl(); | ||||||
16877 | EnclosingDecl->setInvalidDecl(); | ||||||
16878 | continue; | ||||||
16879 | } | ||||||
16880 | // Okay, we have a legal flexible array member at the end of the struct. | ||||||
16881 | Record->setHasFlexibleArrayMember(true); | ||||||
16882 | } else { | ||||||
16883 | // In ObjCContainerDecl ivars with incomplete array type are accepted, | ||||||
16884 | // unless they are followed by another ivar. That check is done | ||||||
16885 | // elsewhere, after synthesized ivars are known. | ||||||
16886 | } | ||||||
16887 | } else if (!FDTy->isDependentType() && | ||||||
16888 | RequireCompleteType(FD->getLocation(), FD->getType(), | ||||||
16889 | diag::err_field_incomplete)) { | ||||||
16890 | // Incomplete type | ||||||
16891 | FD->setInvalidDecl(); | ||||||
16892 | EnclosingDecl->setInvalidDecl(); | ||||||
16893 | continue; | ||||||
16894 | } else if (const RecordType *FDTTy = FDTy->getAs<RecordType>()) { | ||||||
16895 | if (Record && FDTTy->getDecl()->hasFlexibleArrayMember()) { | ||||||
16896 | // A type which contains a flexible array member is considered to be a | ||||||
16897 | // flexible array member. | ||||||
16898 | Record->setHasFlexibleArrayMember(true); | ||||||
16899 | if (!Record->isUnion()) { | ||||||
16900 | // If this is a struct/class and this is not the last element, reject | ||||||
16901 | // it. Note that GCC supports variable sized arrays in the middle of | ||||||
16902 | // structures. | ||||||
16903 | if (!IsLastField) | ||||||
16904 | Diag(FD->getLocation(), diag::ext_variable_sized_type_in_struct) | ||||||
16905 | << FD->getDeclName() << FD->getType(); | ||||||
16906 | else { | ||||||
16907 | // We support flexible arrays at the end of structs in | ||||||
16908 | // other structs as an extension. | ||||||
16909 | Diag(FD->getLocation(), diag::ext_flexible_array_in_struct) | ||||||
16910 | << FD->getDeclName(); | ||||||
16911 | } | ||||||
16912 | } | ||||||
16913 | } | ||||||
16914 | if (isa<ObjCContainerDecl>(EnclosingDecl) && | ||||||
16915 | RequireNonAbstractType(FD->getLocation(), FD->getType(), | ||||||
16916 | diag::err_abstract_type_in_decl, | ||||||
16917 | AbstractIvarType)) { | ||||||
16918 | // Ivars can not have abstract class types | ||||||
16919 | FD->setInvalidDecl(); | ||||||
16920 | } | ||||||
16921 | if (Record && FDTTy->getDecl()->hasObjectMember()) | ||||||
16922 | Record->setHasObjectMember(true); | ||||||
16923 | if (Record && FDTTy->getDecl()->hasVolatileMember()) | ||||||
16924 | Record->setHasVolatileMember(true); | ||||||
16925 | } else if (FDTy->isObjCObjectType()) { | ||||||
16926 | /// A field cannot be an Objective-c object | ||||||
16927 | Diag(FD->getLocation(), diag::err_statically_allocated_object) | ||||||
16928 | << FixItHint::CreateInsertion(FD->getLocation(), "*"); | ||||||
16929 | QualType T = Context.getObjCObjectPointerType(FD->getType()); | ||||||
16930 | FD->setType(T); | ||||||
16931 | } else if (Record && Record->isUnion() && | ||||||
16932 | FD->getType().hasNonTrivialObjCLifetime() && | ||||||
16933 | getSourceManager().isInSystemHeader(FD->getLocation()) && | ||||||
16934 | !getLangOpts().CPlusPlus && !FD->hasAttr<UnavailableAttr>() && | ||||||
16935 | (FD->getType().getObjCLifetime() != Qualifiers::OCL_Strong || | ||||||
16936 | !Context.hasDirectOwnershipQualifier(FD->getType()))) { | ||||||
16937 | // For backward compatibility, fields of C unions declared in system | ||||||
16938 | // headers that have non-trivial ObjC ownership qualifications are marked | ||||||
16939 | // as unavailable unless the qualifier is explicit and __strong. This can | ||||||
16940 | // break ABI compatibility between programs compiled with ARC and MRR, but | ||||||
16941 | // is a better option than rejecting programs using those unions under | ||||||
16942 | // ARC. | ||||||
16943 | FD->addAttr(UnavailableAttr::CreateImplicit( | ||||||
16944 | Context, "", UnavailableAttr::IR_ARCFieldWithOwnership, | ||||||
16945 | FD->getLocation())); | ||||||
16946 | } else if (getLangOpts().ObjC && | ||||||
16947 | getLangOpts().getGC() != LangOptions::NonGC && | ||||||
16948 | Record && !Record->hasObjectMember()) { | ||||||
16949 | if (FD->getType()->isObjCObjectPointerType() || | ||||||
16950 | FD->getType().isObjCGCStrong()) | ||||||
16951 | Record->setHasObjectMember(true); | ||||||
16952 | else if (Context.getAsArrayType(FD->getType())) { | ||||||
16953 | QualType BaseType = Context.getBaseElementType(FD->getType()); | ||||||
16954 | if (BaseType->isRecordType() && | ||||||
16955 | BaseType->castAs<RecordType>()->getDecl()->hasObjectMember()) | ||||||
16956 | Record->setHasObjectMember(true); | ||||||
16957 | else if (BaseType->isObjCObjectPointerType() || | ||||||
16958 | BaseType.isObjCGCStrong()) | ||||||
16959 | Record->setHasObjectMember(true); | ||||||
16960 | } | ||||||
16961 | } | ||||||
16962 | |||||||
16963 | if (Record && !getLangOpts().CPlusPlus && | ||||||
16964 | !shouldIgnoreForRecordTriviality(FD)) { | ||||||
16965 | QualType FT = FD->getType(); | ||||||
16966 | if (FT.isNonTrivialToPrimitiveDefaultInitialize()) { | ||||||
16967 | Record->setNonTrivialToPrimitiveDefaultInitialize(true); | ||||||
16968 | if (FT.hasNonTrivialToPrimitiveDefaultInitializeCUnion() || | ||||||
16969 | Record->isUnion()) | ||||||
16970 | Record->setHasNonTrivialToPrimitiveDefaultInitializeCUnion(true); | ||||||
16971 | } | ||||||
16972 | QualType::PrimitiveCopyKind PCK = FT.isNonTrivialToPrimitiveCopy(); | ||||||
16973 | if (PCK != QualType::PCK_Trivial && PCK != QualType::PCK_VolatileTrivial) { | ||||||
16974 | Record->setNonTrivialToPrimitiveCopy(true); | ||||||
16975 | if (FT.hasNonTrivialToPrimitiveCopyCUnion() || Record->isUnion()) | ||||||
16976 | Record->setHasNonTrivialToPrimitiveCopyCUnion(true); | ||||||
16977 | } | ||||||
16978 | if (FT.isDestructedType()) { | ||||||
16979 | Record->setNonTrivialToPrimitiveDestroy(true); | ||||||
16980 | Record->setParamDestroyedInCallee(true); | ||||||
16981 | if (FT.hasNonTrivialToPrimitiveDestructCUnion() || Record->isUnion()) | ||||||
16982 | Record->setHasNonTrivialToPrimitiveDestructCUnion(true); | ||||||
16983 | } | ||||||
16984 | |||||||
16985 | if (const auto *RT = FT->getAs<RecordType>()) { | ||||||
16986 | if (RT->getDecl()->getArgPassingRestrictions() == | ||||||
16987 | RecordDecl::APK_CanNeverPassInRegs) | ||||||
16988 | Record->setArgPassingRestrictions(RecordDecl::APK_CanNeverPassInRegs); | ||||||
16989 | } else if (FT.getQualifiers().getObjCLifetime() == Qualifiers::OCL_Weak) | ||||||
16990 | Record->setArgPassingRestrictions(RecordDecl::APK_CanNeverPassInRegs); | ||||||
16991 | } | ||||||
16992 | |||||||
16993 | if (Record && FD->getType().isVolatileQualified()) | ||||||
16994 | Record->setHasVolatileMember(true); | ||||||
16995 | // Keep track of the number of named members. | ||||||
16996 | if (FD->getIdentifier()) | ||||||
16997 | ++NumNamedMembers; | ||||||
16998 | } | ||||||
16999 | |||||||
17000 | // Okay, we successfully defined 'Record'. | ||||||
17001 | if (Record) { | ||||||
17002 | bool Completed = false; | ||||||
17003 | if (CXXRecord) { | ||||||
17004 | if (!CXXRecord->isInvalidDecl()) { | ||||||
17005 | // Set access bits correctly on the directly-declared conversions. | ||||||
17006 | for (CXXRecordDecl::conversion_iterator | ||||||
17007 | I = CXXRecord->conversion_begin(), | ||||||
17008 | E = CXXRecord->conversion_end(); I != E; ++I) | ||||||
17009 | I.setAccess((*I)->getAccess()); | ||||||
17010 | } | ||||||
17011 | |||||||
17012 | if (!CXXRecord->isDependentType()) { | ||||||
17013 | // Add any implicitly-declared members to this class. | ||||||
17014 | AddImplicitlyDeclaredMembersToClass(CXXRecord); | ||||||
17015 | |||||||
17016 | if (!CXXRecord->isInvalidDecl()) { | ||||||
17017 | // If we have virtual base classes, we may end up finding multiple | ||||||
17018 | // final overriders for a given virtual function. Check for this | ||||||
17019 | // problem now. | ||||||
17020 | if (CXXRecord->getNumVBases()) { | ||||||
17021 | CXXFinalOverriderMap FinalOverriders; | ||||||
17022 | CXXRecord->getFinalOverriders(FinalOverriders); | ||||||
17023 | |||||||
17024 | for (CXXFinalOverriderMap::iterator M = FinalOverriders.begin(), | ||||||
17025 | MEnd = FinalOverriders.end(); | ||||||
17026 | M != MEnd; ++M) { | ||||||
17027 | for (OverridingMethods::iterator SO = M->second.begin(), | ||||||
17028 | SOEnd = M->second.end(); | ||||||
17029 | SO != SOEnd; ++SO) { | ||||||
17030 | assert(SO->second.size() > 0 &&((SO->second.size() > 0 && "Virtual function without overriding functions?" ) ? static_cast<void> (0) : __assert_fail ("SO->second.size() > 0 && \"Virtual function without overriding functions?\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 17031, __PRETTY_FUNCTION__)) | ||||||
17031 | "Virtual function without overriding functions?")((SO->second.size() > 0 && "Virtual function without overriding functions?" ) ? static_cast<void> (0) : __assert_fail ("SO->second.size() > 0 && \"Virtual function without overriding functions?\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 17031, __PRETTY_FUNCTION__)); | ||||||
17032 | if (SO->second.size() == 1) | ||||||
17033 | continue; | ||||||
17034 | |||||||
17035 | // C++ [class.virtual]p2: | ||||||
17036 | // In a derived class, if a virtual member function of a base | ||||||
17037 | // class subobject has more than one final overrider the | ||||||
17038 | // program is ill-formed. | ||||||
17039 | Diag(Record->getLocation(), diag::err_multiple_final_overriders) | ||||||
17040 | << (const NamedDecl *)M->first << Record; | ||||||
17041 | Diag(M->first->getLocation(), | ||||||
17042 | diag::note_overridden_virtual_function); | ||||||
17043 | for (OverridingMethods::overriding_iterator | ||||||
17044 | OM = SO->second.begin(), | ||||||
17045 | OMEnd = SO->second.end(); | ||||||
17046 | OM != OMEnd; ++OM) | ||||||
17047 | Diag(OM->Method->getLocation(), diag::note_final_overrider) | ||||||
17048 | << (const NamedDecl *)M->first << OM->Method->getParent(); | ||||||
17049 | |||||||
17050 | Record->setInvalidDecl(); | ||||||
17051 | } | ||||||
17052 | } | ||||||
17053 | CXXRecord->completeDefinition(&FinalOverriders); | ||||||
17054 | Completed = true; | ||||||
17055 | } | ||||||
17056 | } | ||||||
17057 | } | ||||||
17058 | } | ||||||
17059 | |||||||
17060 | if (!Completed) | ||||||
17061 | Record->completeDefinition(); | ||||||
17062 | |||||||
17063 | // Handle attributes before checking the layout. | ||||||
17064 | ProcessDeclAttributeList(S, Record, Attrs); | ||||||
17065 | |||||||
17066 | // We may have deferred checking for a deleted destructor. Check now. | ||||||
17067 | if (CXXRecord) { | ||||||
17068 | auto *Dtor = CXXRecord->getDestructor(); | ||||||
17069 | if (Dtor && Dtor->isImplicit() && | ||||||
17070 | ShouldDeleteSpecialMember(Dtor, CXXDestructor)) { | ||||||
17071 | CXXRecord->setImplicitDestructorIsDeleted(); | ||||||
17072 | SetDeclDeleted(Dtor, CXXRecord->getLocation()); | ||||||
17073 | } | ||||||
17074 | } | ||||||
17075 | |||||||
17076 | if (Record->hasAttrs()) { | ||||||
17077 | CheckAlignasUnderalignment(Record); | ||||||
17078 | |||||||
17079 | if (const MSInheritanceAttr *IA = Record->getAttr<MSInheritanceAttr>()) | ||||||
17080 | checkMSInheritanceAttrOnDefinition(cast<CXXRecordDecl>(Record), | ||||||
17081 | IA->getRange(), IA->getBestCase(), | ||||||
17082 | IA->getInheritanceModel()); | ||||||
17083 | } | ||||||
17084 | |||||||
17085 | // Check if the structure/union declaration is a type that can have zero | ||||||
17086 | // size in C. For C this is a language extension, for C++ it may cause | ||||||
17087 | // compatibility problems. | ||||||
17088 | bool CheckForZeroSize; | ||||||
17089 | if (!getLangOpts().CPlusPlus) { | ||||||
17090 | CheckForZeroSize = true; | ||||||
17091 | } else { | ||||||
17092 | // For C++ filter out types that cannot be referenced in C code. | ||||||
17093 | CXXRecordDecl *CXXRecord = cast<CXXRecordDecl>(Record); | ||||||
17094 | CheckForZeroSize = | ||||||
17095 | CXXRecord->getLexicalDeclContext()->isExternCContext() && | ||||||
17096 | !CXXRecord->isDependentType() && | ||||||
17097 | CXXRecord->isCLike(); | ||||||
17098 | } | ||||||
17099 | if (CheckForZeroSize) { | ||||||
17100 | bool ZeroSize = true; | ||||||
17101 | bool IsEmpty = true; | ||||||
17102 | unsigned NonBitFields = 0; | ||||||
17103 | for (RecordDecl::field_iterator I = Record->field_begin(), | ||||||
17104 | E = Record->field_end(); | ||||||
17105 | (NonBitFields == 0 || ZeroSize) && I != E; ++I) { | ||||||
17106 | IsEmpty = false; | ||||||
17107 | if (I->isUnnamedBitfield()) { | ||||||
17108 | if (!I->isZeroLengthBitField(Context)) | ||||||
17109 | ZeroSize = false; | ||||||
17110 | } else { | ||||||
17111 | ++NonBitFields; | ||||||
17112 | QualType FieldType = I->getType(); | ||||||
17113 | if (FieldType->isIncompleteType() || | ||||||
17114 | !Context.getTypeSizeInChars(FieldType).isZero()) | ||||||
17115 | ZeroSize = false; | ||||||
17116 | } | ||||||
17117 | } | ||||||
17118 | |||||||
17119 | // Empty structs are an extension in C (C99 6.7.2.1p7). They are | ||||||
17120 | // allowed in C++, but warn if its declaration is inside | ||||||
17121 | // extern "C" block. | ||||||
17122 | if (ZeroSize) { | ||||||
17123 | Diag(RecLoc, getLangOpts().CPlusPlus ? | ||||||
17124 | diag::warn_zero_size_struct_union_in_extern_c : | ||||||
17125 | diag::warn_zero_size_struct_union_compat) | ||||||
17126 | << IsEmpty << Record->isUnion() << (NonBitFields > 1); | ||||||
17127 | } | ||||||
17128 | |||||||
17129 | // Structs without named members are extension in C (C99 6.7.2.1p7), | ||||||
17130 | // but are accepted by GCC. | ||||||
17131 | if (NonBitFields == 0 && !getLangOpts().CPlusPlus) { | ||||||
17132 | Diag(RecLoc, IsEmpty ? diag::ext_empty_struct_union : | ||||||
17133 | diag::ext_no_named_members_in_struct_union) | ||||||
17134 | << Record->isUnion(); | ||||||
17135 | } | ||||||
17136 | } | ||||||
17137 | } else { | ||||||
17138 | ObjCIvarDecl **ClsFields = | ||||||
17139 | reinterpret_cast<ObjCIvarDecl**>(RecFields.data()); | ||||||
17140 | if (ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(EnclosingDecl)) { | ||||||
17141 | ID->setEndOfDefinitionLoc(RBrac); | ||||||
17142 | // Add ivar's to class's DeclContext. | ||||||
17143 | for (unsigned i = 0, e = RecFields.size(); i != e; ++i) { | ||||||
17144 | ClsFields[i]->setLexicalDeclContext(ID); | ||||||
17145 | ID->addDecl(ClsFields[i]); | ||||||
17146 | } | ||||||
17147 | // Must enforce the rule that ivars in the base classes may not be | ||||||
17148 | // duplicates. | ||||||
17149 | if (ID->getSuperClass()) | ||||||
17150 | DiagnoseDuplicateIvars(ID, ID->getSuperClass()); | ||||||
17151 | } else if (ObjCImplementationDecl *IMPDecl = | ||||||
17152 | dyn_cast<ObjCImplementationDecl>(EnclosingDecl)) { | ||||||
17153 | assert(IMPDecl && "ActOnFields - missing ObjCImplementationDecl")((IMPDecl && "ActOnFields - missing ObjCImplementationDecl" ) ? static_cast<void> (0) : __assert_fail ("IMPDecl && \"ActOnFields - missing ObjCImplementationDecl\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 17153, __PRETTY_FUNCTION__)); | ||||||
17154 | for (unsigned I = 0, N = RecFields.size(); I != N; ++I) | ||||||
17155 | // Ivar declared in @implementation never belongs to the implementation. | ||||||
17156 | // Only it is in implementation's lexical context. | ||||||
17157 | ClsFields[I]->setLexicalDeclContext(IMPDecl); | ||||||
17158 | CheckImplementationIvars(IMPDecl, ClsFields, RecFields.size(), RBrac); | ||||||
17159 | IMPDecl->setIvarLBraceLoc(LBrac); | ||||||
17160 | IMPDecl->setIvarRBraceLoc(RBrac); | ||||||
17161 | } else if (ObjCCategoryDecl *CDecl = | ||||||
17162 | dyn_cast<ObjCCategoryDecl>(EnclosingDecl)) { | ||||||
17163 | // case of ivars in class extension; all other cases have been | ||||||
17164 | // reported as errors elsewhere. | ||||||
17165 | // FIXME. Class extension does not have a LocEnd field. | ||||||
17166 | // CDecl->setLocEnd(RBrac); | ||||||
17167 | // Add ivar's to class extension's DeclContext. | ||||||
17168 | // Diagnose redeclaration of private ivars. | ||||||
17169 | ObjCInterfaceDecl *IDecl = CDecl->getClassInterface(); | ||||||
17170 | for (unsigned i = 0, e = RecFields.size(); i != e; ++i) { | ||||||
17171 | if (IDecl) { | ||||||
17172 | if (const ObjCIvarDecl *ClsIvar = | ||||||
17173 | IDecl->getIvarDecl(ClsFields[i]->getIdentifier())) { | ||||||
17174 | Diag(ClsFields[i]->getLocation(), | ||||||
17175 | diag::err_duplicate_ivar_declaration); | ||||||
17176 | Diag(ClsIvar->getLocation(), diag::note_previous_definition); | ||||||
17177 | continue; | ||||||
17178 | } | ||||||
17179 | for (const auto *Ext : IDecl->known_extensions()) { | ||||||
17180 | if (const ObjCIvarDecl *ClsExtIvar | ||||||
17181 | = Ext->getIvarDecl(ClsFields[i]->getIdentifier())) { | ||||||
17182 | Diag(ClsFields[i]->getLocation(), | ||||||
17183 | diag::err_duplicate_ivar_declaration); | ||||||
17184 | Diag(ClsExtIvar->getLocation(), diag::note_previous_definition); | ||||||
17185 | continue; | ||||||
17186 | } | ||||||
17187 | } | ||||||
17188 | } | ||||||
17189 | ClsFields[i]->setLexicalDeclContext(CDecl); | ||||||
17190 | CDecl->addDecl(ClsFields[i]); | ||||||
17191 | } | ||||||
17192 | CDecl->setIvarLBraceLoc(LBrac); | ||||||
17193 | CDecl->setIvarRBraceLoc(RBrac); | ||||||
17194 | } | ||||||
17195 | } | ||||||
17196 | } | ||||||
17197 | |||||||
17198 | /// Determine whether the given integral value is representable within | ||||||
17199 | /// the given type T. | ||||||
17200 | static bool isRepresentableIntegerValue(ASTContext &Context, | ||||||
17201 | llvm::APSInt &Value, | ||||||
17202 | QualType T) { | ||||||
17203 | assert((T->isIntegralType(Context) || T->isEnumeralType()) &&(((T->isIntegralType(Context) || T->isEnumeralType()) && "Integral type required!") ? static_cast<void> (0) : __assert_fail ("(T->isIntegralType(Context) || T->isEnumeralType()) && \"Integral type required!\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 17204, __PRETTY_FUNCTION__)) | ||||||
17204 | "Integral type required!")(((T->isIntegralType(Context) || T->isEnumeralType()) && "Integral type required!") ? static_cast<void> (0) : __assert_fail ("(T->isIntegralType(Context) || T->isEnumeralType()) && \"Integral type required!\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 17204, __PRETTY_FUNCTION__)); | ||||||
17205 | unsigned BitWidth = Context.getIntWidth(T); | ||||||
17206 | |||||||
17207 | if (Value.isUnsigned() || Value.isNonNegative()) { | ||||||
17208 | if (T->isSignedIntegerOrEnumerationType()) | ||||||
17209 | --BitWidth; | ||||||
17210 | return Value.getActiveBits() <= BitWidth; | ||||||
17211 | } | ||||||
17212 | return Value.getMinSignedBits() <= BitWidth; | ||||||
17213 | } | ||||||
17214 | |||||||
17215 | // Given an integral type, return the next larger integral type | ||||||
17216 | // (or a NULL type of no such type exists). | ||||||
17217 | static QualType getNextLargerIntegralType(ASTContext &Context, QualType T) { | ||||||
17218 | // FIXME: Int128/UInt128 support, which also needs to be introduced into | ||||||
17219 | // enum checking below. | ||||||
17220 | assert((T->isIntegralType(Context) ||(((T->isIntegralType(Context) || T->isEnumeralType()) && "Integral type required!") ? static_cast<void> (0) : __assert_fail ("(T->isIntegralType(Context) || T->isEnumeralType()) && \"Integral type required!\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 17221, __PRETTY_FUNCTION__)) | ||||||
17221 | T->isEnumeralType()) && "Integral type required!")(((T->isIntegralType(Context) || T->isEnumeralType()) && "Integral type required!") ? static_cast<void> (0) : __assert_fail ("(T->isIntegralType(Context) || T->isEnumeralType()) && \"Integral type required!\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 17221, __PRETTY_FUNCTION__)); | ||||||
17222 | const unsigned NumTypes = 4; | ||||||
17223 | QualType SignedIntegralTypes[NumTypes] = { | ||||||
17224 | Context.ShortTy, Context.IntTy, Context.LongTy, Context.LongLongTy | ||||||
17225 | }; | ||||||
17226 | QualType UnsignedIntegralTypes[NumTypes] = { | ||||||
17227 | Context.UnsignedShortTy, Context.UnsignedIntTy, Context.UnsignedLongTy, | ||||||
17228 | Context.UnsignedLongLongTy | ||||||
17229 | }; | ||||||
17230 | |||||||
17231 | unsigned BitWidth = Context.getTypeSize(T); | ||||||
17232 | QualType *Types = T->isSignedIntegerOrEnumerationType()? SignedIntegralTypes | ||||||
17233 | : UnsignedIntegralTypes; | ||||||
17234 | for (unsigned I = 0; I != NumTypes; ++I) | ||||||
17235 | if (Context.getTypeSize(Types[I]) > BitWidth) | ||||||
17236 | return Types[I]; | ||||||
17237 | |||||||
17238 | return QualType(); | ||||||
17239 | } | ||||||
17240 | |||||||
17241 | EnumConstantDecl *Sema::CheckEnumConstant(EnumDecl *Enum, | ||||||
17242 | EnumConstantDecl *LastEnumConst, | ||||||
17243 | SourceLocation IdLoc, | ||||||
17244 | IdentifierInfo *Id, | ||||||
17245 | Expr *Val) { | ||||||
17246 | unsigned IntWidth = Context.getTargetInfo().getIntWidth(); | ||||||
17247 | llvm::APSInt EnumVal(IntWidth); | ||||||
17248 | QualType EltTy; | ||||||
17249 | |||||||
17250 | if (Val && DiagnoseUnexpandedParameterPack(Val, UPPC_EnumeratorValue)) | ||||||
17251 | Val = nullptr; | ||||||
17252 | |||||||
17253 | if (Val) | ||||||
17254 | Val = DefaultLvalueConversion(Val).get(); | ||||||
17255 | |||||||
17256 | if (Val) { | ||||||
17257 | if (Enum->isDependentType() || Val->isTypeDependent()) | ||||||
17258 | EltTy = Context.DependentTy; | ||||||
17259 | else { | ||||||
17260 | if (getLangOpts().CPlusPlus11 && Enum->isFixed()) { | ||||||
17261 | // C++11 [dcl.enum]p5: If the underlying type is fixed, [...] the | ||||||
17262 | // constant-expression in the enumerator-definition shall be a converted | ||||||
17263 | // constant expression of the underlying type. | ||||||
17264 | EltTy = Enum->getIntegerType(); | ||||||
17265 | ExprResult Converted = | ||||||
17266 | CheckConvertedConstantExpression(Val, EltTy, EnumVal, | ||||||
17267 | CCEK_Enumerator); | ||||||
17268 | if (Converted.isInvalid()) | ||||||
17269 | Val = nullptr; | ||||||
17270 | else | ||||||
17271 | Val = Converted.get(); | ||||||
17272 | } else if (!Val->isValueDependent() && | ||||||
17273 | !(Val = VerifyIntegerConstantExpression(Val, | ||||||
17274 | &EnumVal).get())) { | ||||||
17275 | // C99 6.7.2.2p2: Make sure we have an integer constant expression. | ||||||
17276 | } else { | ||||||
17277 | if (Enum->isComplete()) { | ||||||
17278 | EltTy = Enum->getIntegerType(); | ||||||
17279 | |||||||
17280 | // In Obj-C and Microsoft mode, require the enumeration value to be | ||||||
17281 | // representable in the underlying type of the enumeration. In C++11, | ||||||
17282 | // we perform a non-narrowing conversion as part of converted constant | ||||||
17283 | // expression checking. | ||||||
17284 | if (!isRepresentableIntegerValue(Context, EnumVal, EltTy)) { | ||||||
17285 | if (Context.getTargetInfo() | ||||||
17286 | .getTriple() | ||||||
17287 | .isWindowsMSVCEnvironment()) { | ||||||
17288 | Diag(IdLoc, diag::ext_enumerator_too_large) << EltTy; | ||||||
17289 | } else { | ||||||
17290 | Diag(IdLoc, diag::err_enumerator_too_large) << EltTy; | ||||||
17291 | } | ||||||
17292 | } | ||||||
17293 | |||||||
17294 | // Cast to the underlying type. | ||||||
17295 | Val = ImpCastExprToType(Val, EltTy, | ||||||
17296 | EltTy->isBooleanType() ? CK_IntegralToBoolean | ||||||
17297 | : CK_IntegralCast) | ||||||
17298 | .get(); | ||||||
17299 | } else if (getLangOpts().CPlusPlus) { | ||||||
17300 | // C++11 [dcl.enum]p5: | ||||||
17301 | // If the underlying type is not fixed, the type of each enumerator | ||||||
17302 | // is the type of its initializing value: | ||||||
17303 | // - If an initializer is specified for an enumerator, the | ||||||
17304 | // initializing value has the same type as the expression. | ||||||
17305 | EltTy = Val->getType(); | ||||||
17306 | } else { | ||||||
17307 | // C99 6.7.2.2p2: | ||||||
17308 | // The expression that defines the value of an enumeration constant | ||||||
17309 | // shall be an integer constant expression that has a value | ||||||
17310 | // representable as an int. | ||||||
17311 | |||||||
17312 | // Complain if the value is not representable in an int. | ||||||
17313 | if (!isRepresentableIntegerValue(Context, EnumVal, Context.IntTy)) | ||||||
17314 | Diag(IdLoc, diag::ext_enum_value_not_int) | ||||||
17315 | << EnumVal.toString(10) << Val->getSourceRange() | ||||||
17316 | << (EnumVal.isUnsigned() || EnumVal.isNonNegative()); | ||||||
17317 | else if (!Context.hasSameType(Val->getType(), Context.IntTy)) { | ||||||
17318 | // Force the type of the expression to 'int'. | ||||||
17319 | Val = ImpCastExprToType(Val, Context.IntTy, CK_IntegralCast).get(); | ||||||
17320 | } | ||||||
17321 | EltTy = Val->getType(); | ||||||
17322 | } | ||||||
17323 | } | ||||||
17324 | } | ||||||
17325 | } | ||||||
17326 | |||||||
17327 | if (!Val) { | ||||||
17328 | if (Enum->isDependentType()) | ||||||
17329 | EltTy = Context.DependentTy; | ||||||
17330 | else if (!LastEnumConst) { | ||||||
17331 | // C++0x [dcl.enum]p5: | ||||||
17332 | // If the underlying type is not fixed, the type of each enumerator | ||||||
17333 | // is the type of its initializing value: | ||||||
17334 | // - If no initializer is specified for the first enumerator, the | ||||||
17335 | // initializing value has an unspecified integral type. | ||||||
17336 | // | ||||||
17337 | // GCC uses 'int' for its unspecified integral type, as does | ||||||
17338 | // C99 6.7.2.2p3. | ||||||
17339 | if (Enum->isFixed()) { | ||||||
17340 | EltTy = Enum->getIntegerType(); | ||||||
17341 | } | ||||||
17342 | else { | ||||||
17343 | EltTy = Context.IntTy; | ||||||
17344 | } | ||||||
17345 | } else { | ||||||
17346 | // Assign the last value + 1. | ||||||
17347 | EnumVal = LastEnumConst->getInitVal(); | ||||||
17348 | ++EnumVal; | ||||||
17349 | EltTy = LastEnumConst->getType(); | ||||||
17350 | |||||||
17351 | // Check for overflow on increment. | ||||||
17352 | if (EnumVal < LastEnumConst->getInitVal()) { | ||||||
17353 | // C++0x [dcl.enum]p5: | ||||||
17354 | // If the underlying type is not fixed, the type of each enumerator | ||||||
17355 | // is the type of its initializing value: | ||||||
17356 | // | ||||||
17357 | // - Otherwise the type of the initializing value is the same as | ||||||
17358 | // the type of the initializing value of the preceding enumerator | ||||||
17359 | // unless the incremented value is not representable in that type, | ||||||
17360 | // in which case the type is an unspecified integral type | ||||||
17361 | // sufficient to contain the incremented value. If no such type | ||||||
17362 | // exists, the program is ill-formed. | ||||||
17363 | QualType T = getNextLargerIntegralType(Context, EltTy); | ||||||
17364 | if (T.isNull() || Enum->isFixed()) { | ||||||
17365 | // There is no integral type larger enough to represent this | ||||||
17366 | // value. Complain, then allow the value to wrap around. | ||||||
17367 | EnumVal = LastEnumConst->getInitVal(); | ||||||
17368 | EnumVal = EnumVal.zext(EnumVal.getBitWidth() * 2); | ||||||
17369 | ++EnumVal; | ||||||
17370 | if (Enum->isFixed()) | ||||||
17371 | // When the underlying type is fixed, this is ill-formed. | ||||||
17372 | Diag(IdLoc, diag::err_enumerator_wrapped) | ||||||
17373 | << EnumVal.toString(10) | ||||||
17374 | << EltTy; | ||||||
17375 | else | ||||||
17376 | Diag(IdLoc, diag::ext_enumerator_increment_too_large) | ||||||
17377 | << EnumVal.toString(10); | ||||||
17378 | } else { | ||||||
17379 | EltTy = T; | ||||||
17380 | } | ||||||
17381 | |||||||
17382 | // Retrieve the last enumerator's value, extent that type to the | ||||||
17383 | // type that is supposed to be large enough to represent the incremented | ||||||
17384 | // value, then increment. | ||||||
17385 | EnumVal = LastEnumConst->getInitVal(); | ||||||
17386 | EnumVal.setIsSigned(EltTy->isSignedIntegerOrEnumerationType()); | ||||||
17387 | EnumVal = EnumVal.zextOrTrunc(Context.getIntWidth(EltTy)); | ||||||
17388 | ++EnumVal; | ||||||
17389 | |||||||
17390 | // If we're not in C++, diagnose the overflow of enumerator values, | ||||||
17391 | // which in C99 means that the enumerator value is not representable in | ||||||
17392 | // an int (C99 6.7.2.2p2). However, we support GCC's extension that | ||||||
17393 | // permits enumerator values that are representable in some larger | ||||||
17394 | // integral type. | ||||||
17395 | if (!getLangOpts().CPlusPlus && !T.isNull()) | ||||||
17396 | Diag(IdLoc, diag::warn_enum_value_overflow); | ||||||
17397 | } else if (!getLangOpts().CPlusPlus && | ||||||
17398 | !isRepresentableIntegerValue(Context, EnumVal, EltTy)) { | ||||||
17399 | // Enforce C99 6.7.2.2p2 even when we compute the next value. | ||||||
17400 | Diag(IdLoc, diag::ext_enum_value_not_int) | ||||||
17401 | << EnumVal.toString(10) << 1; | ||||||
17402 | } | ||||||
17403 | } | ||||||
17404 | } | ||||||
17405 | |||||||
17406 | if (!EltTy->isDependentType()) { | ||||||
17407 | // Make the enumerator value match the signedness and size of the | ||||||
17408 | // enumerator's type. | ||||||
17409 | EnumVal = EnumVal.extOrTrunc(Context.getIntWidth(EltTy)); | ||||||
17410 | EnumVal.setIsSigned(EltTy->isSignedIntegerOrEnumerationType()); | ||||||
17411 | } | ||||||
17412 | |||||||
17413 | return EnumConstantDecl::Create(Context, Enum, IdLoc, Id, EltTy, | ||||||
17414 | Val, EnumVal); | ||||||
17415 | } | ||||||
17416 | |||||||
17417 | Sema::SkipBodyInfo Sema::shouldSkipAnonEnumBody(Scope *S, IdentifierInfo *II, | ||||||
17418 | SourceLocation IILoc) { | ||||||
17419 | if (!(getLangOpts().Modules || getLangOpts().ModulesLocalVisibility) || | ||||||
17420 | !getLangOpts().CPlusPlus) | ||||||
17421 | return SkipBodyInfo(); | ||||||
17422 | |||||||
17423 | // We have an anonymous enum definition. Look up the first enumerator to | ||||||
17424 | // determine if we should merge the definition with an existing one and | ||||||
17425 | // skip the body. | ||||||
17426 | NamedDecl *PrevDecl = LookupSingleName(S, II, IILoc, LookupOrdinaryName, | ||||||
17427 | forRedeclarationInCurContext()); | ||||||
17428 | auto *PrevECD = dyn_cast_or_null<EnumConstantDecl>(PrevDecl); | ||||||
17429 | if (!PrevECD) | ||||||
17430 | return SkipBodyInfo(); | ||||||
17431 | |||||||
17432 | EnumDecl *PrevED = cast<EnumDecl>(PrevECD->getDeclContext()); | ||||||
17433 | NamedDecl *Hidden; | ||||||
17434 | if (!PrevED->getDeclName() && !hasVisibleDefinition(PrevED, &Hidden)) { | ||||||
17435 | SkipBodyInfo Skip; | ||||||
17436 | Skip.Previous = Hidden; | ||||||
17437 | return Skip; | ||||||
17438 | } | ||||||
17439 | |||||||
17440 | return SkipBodyInfo(); | ||||||
17441 | } | ||||||
17442 | |||||||
17443 | Decl *Sema::ActOnEnumConstant(Scope *S, Decl *theEnumDecl, Decl *lastEnumConst, | ||||||
17444 | SourceLocation IdLoc, IdentifierInfo *Id, | ||||||
17445 | const ParsedAttributesView &Attrs, | ||||||
17446 | SourceLocation EqualLoc, Expr *Val) { | ||||||
17447 | EnumDecl *TheEnumDecl = cast<EnumDecl>(theEnumDecl); | ||||||
17448 | EnumConstantDecl *LastEnumConst = | ||||||
17449 | cast_or_null<EnumConstantDecl>(lastEnumConst); | ||||||
17450 | |||||||
17451 | // The scope passed in may not be a decl scope. Zip up the scope tree until | ||||||
17452 | // we find one that is. | ||||||
17453 | S = getNonFieldDeclScope(S); | ||||||
17454 | |||||||
17455 | // Verify that there isn't already something declared with this name in this | ||||||
17456 | // scope. | ||||||
17457 | LookupResult R(*this, Id, IdLoc, LookupOrdinaryName, ForVisibleRedeclaration); | ||||||
17458 | LookupName(R, S); | ||||||
17459 | NamedDecl *PrevDecl = R.getAsSingle<NamedDecl>(); | ||||||
17460 | |||||||
17461 | if (PrevDecl && PrevDecl->isTemplateParameter()) { | ||||||
17462 | // Maybe we will complain about the shadowed template parameter. | ||||||
17463 | DiagnoseTemplateParameterShadow(IdLoc, PrevDecl); | ||||||
17464 | // Just pretend that we didn't see the previous declaration. | ||||||
17465 | PrevDecl = nullptr; | ||||||
17466 | } | ||||||
17467 | |||||||
17468 | // C++ [class.mem]p15: | ||||||
17469 | // If T is the name of a class, then each of the following shall have a name | ||||||
17470 | // different from T: | ||||||
17471 | // - every enumerator of every member of class T that is an unscoped | ||||||
17472 | // enumerated type | ||||||
17473 | if (getLangOpts().CPlusPlus && !TheEnumDecl->isScoped()) | ||||||
17474 | DiagnoseClassNameShadow(TheEnumDecl->getDeclContext(), | ||||||
17475 | DeclarationNameInfo(Id, IdLoc)); | ||||||
17476 | |||||||
17477 | EnumConstantDecl *New = | ||||||
17478 | CheckEnumConstant(TheEnumDecl, LastEnumConst, IdLoc, Id, Val); | ||||||
17479 | if (!New) | ||||||
17480 | return nullptr; | ||||||
17481 | |||||||
17482 | if (PrevDecl) { | ||||||
17483 | if (!TheEnumDecl->isScoped() && isa<ValueDecl>(PrevDecl)) { | ||||||
17484 | // Check for other kinds of shadowing not already handled. | ||||||
17485 | CheckShadow(New, PrevDecl, R); | ||||||
17486 | } | ||||||
17487 | |||||||
17488 | // When in C++, we may get a TagDecl with the same name; in this case the | ||||||
17489 | // enum constant will 'hide' the tag. | ||||||
17490 | assert((getLangOpts().CPlusPlus || !isa<TagDecl>(PrevDecl)) &&(((getLangOpts().CPlusPlus || !isa<TagDecl>(PrevDecl)) && "Received TagDecl when not in C++!") ? static_cast<void> (0) : __assert_fail ("(getLangOpts().CPlusPlus || !isa<TagDecl>(PrevDecl)) && \"Received TagDecl when not in C++!\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 17491, __PRETTY_FUNCTION__)) | ||||||
17491 | "Received TagDecl when not in C++!")(((getLangOpts().CPlusPlus || !isa<TagDecl>(PrevDecl)) && "Received TagDecl when not in C++!") ? static_cast<void> (0) : __assert_fail ("(getLangOpts().CPlusPlus || !isa<TagDecl>(PrevDecl)) && \"Received TagDecl when not in C++!\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 17491, __PRETTY_FUNCTION__)); | ||||||
17492 | if (!isa<TagDecl>(PrevDecl) && isDeclInScope(PrevDecl, CurContext, S)) { | ||||||
17493 | if (isa<EnumConstantDecl>(PrevDecl)) | ||||||
17494 | Diag(IdLoc, diag::err_redefinition_of_enumerator) << Id; | ||||||
17495 | else | ||||||
17496 | Diag(IdLoc, diag::err_redefinition) << Id; | ||||||
17497 | notePreviousDefinition(PrevDecl, IdLoc); | ||||||
17498 | return nullptr; | ||||||
17499 | } | ||||||
17500 | } | ||||||
17501 | |||||||
17502 | // Process attributes. | ||||||
17503 | ProcessDeclAttributeList(S, New, Attrs); | ||||||
17504 | AddPragmaAttributes(S, New); | ||||||
17505 | |||||||
17506 | // Register this decl in the current scope stack. | ||||||
17507 | New->setAccess(TheEnumDecl->getAccess()); | ||||||
17508 | PushOnScopeChains(New, S); | ||||||
17509 | |||||||
17510 | ActOnDocumentableDecl(New); | ||||||
17511 | |||||||
17512 | return New; | ||||||
17513 | } | ||||||
17514 | |||||||
17515 | // Returns true when the enum initial expression does not trigger the | ||||||
17516 | // duplicate enum warning. A few common cases are exempted as follows: | ||||||
17517 | // Element2 = Element1 | ||||||
17518 | // Element2 = Element1 + 1 | ||||||
17519 | // Element2 = Element1 - 1 | ||||||
17520 | // Where Element2 and Element1 are from the same enum. | ||||||
17521 | static bool ValidDuplicateEnum(EnumConstantDecl *ECD, EnumDecl *Enum) { | ||||||
17522 | Expr *InitExpr = ECD->getInitExpr(); | ||||||
17523 | if (!InitExpr) | ||||||
17524 | return true; | ||||||
17525 | InitExpr = InitExpr->IgnoreImpCasts(); | ||||||
17526 | |||||||
17527 | if (BinaryOperator *BO = dyn_cast<BinaryOperator>(InitExpr)) { | ||||||
17528 | if (!BO->isAdditiveOp()) | ||||||
17529 | return true; | ||||||
17530 | IntegerLiteral *IL = dyn_cast<IntegerLiteral>(BO->getRHS()); | ||||||
17531 | if (!IL) | ||||||
17532 | return true; | ||||||
17533 | if (IL->getValue() != 1) | ||||||
17534 | return true; | ||||||
17535 | |||||||
17536 | InitExpr = BO->getLHS(); | ||||||
17537 | } | ||||||
17538 | |||||||
17539 | // This checks if the elements are from the same enum. | ||||||
17540 | DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(InitExpr); | ||||||
17541 | if (!DRE) | ||||||
17542 | return true; | ||||||
17543 | |||||||
17544 | EnumConstantDecl *EnumConstant = dyn_cast<EnumConstantDecl>(DRE->getDecl()); | ||||||
17545 | if (!EnumConstant) | ||||||
17546 | return true; | ||||||
17547 | |||||||
17548 | if (cast<EnumDecl>(TagDecl::castFromDeclContext(ECD->getDeclContext())) != | ||||||
17549 | Enum) | ||||||
17550 | return true; | ||||||
17551 | |||||||
17552 | return false; | ||||||
17553 | } | ||||||
17554 | |||||||
17555 | // Emits a warning when an element is implicitly set a value that | ||||||
17556 | // a previous element has already been set to. | ||||||
17557 | static void CheckForDuplicateEnumValues(Sema &S, ArrayRef<Decl *> Elements, | ||||||
17558 | EnumDecl *Enum, QualType EnumType) { | ||||||
17559 | // Avoid anonymous enums | ||||||
17560 | if (!Enum->getIdentifier()) | ||||||
17561 | return; | ||||||
17562 | |||||||
17563 | // Only check for small enums. | ||||||
17564 | if (Enum->getNumPositiveBits() > 63 || Enum->getNumNegativeBits() > 64) | ||||||
17565 | return; | ||||||
17566 | |||||||
17567 | if (S.Diags.isIgnored(diag::warn_duplicate_enum_values, Enum->getLocation())) | ||||||
17568 | return; | ||||||
17569 | |||||||
17570 | typedef SmallVector<EnumConstantDecl *, 3> ECDVector; | ||||||
17571 | typedef SmallVector<std::unique_ptr<ECDVector>, 3> DuplicatesVector; | ||||||
17572 | |||||||
17573 | typedef llvm::PointerUnion<EnumConstantDecl*, ECDVector*> DeclOrVector; | ||||||
17574 | |||||||
17575 | // DenseMaps cannot contain the all ones int64_t value, so use unordered_map. | ||||||
17576 | typedef std::unordered_map<int64_t, DeclOrVector> ValueToVectorMap; | ||||||
17577 | |||||||
17578 | // Use int64_t as a key to avoid needing special handling for map keys. | ||||||
17579 | auto EnumConstantToKey = [](const EnumConstantDecl *D) { | ||||||
17580 | llvm::APSInt Val = D->getInitVal(); | ||||||
17581 | return Val.isSigned() ? Val.getSExtValue() : Val.getZExtValue(); | ||||||
17582 | }; | ||||||
17583 | |||||||
17584 | DuplicatesVector DupVector; | ||||||
17585 | ValueToVectorMap EnumMap; | ||||||
17586 | |||||||
17587 | // Populate the EnumMap with all values represented by enum constants without | ||||||
17588 | // an initializer. | ||||||
17589 | for (auto *Element : Elements) { | ||||||
17590 | EnumConstantDecl *ECD = cast_or_null<EnumConstantDecl>(Element); | ||||||
17591 | |||||||
17592 | // Null EnumConstantDecl means a previous diagnostic has been emitted for | ||||||
17593 | // this constant. Skip this enum since it may be ill-formed. | ||||||
17594 | if (!ECD) { | ||||||
17595 | return; | ||||||
17596 | } | ||||||
17597 | |||||||
17598 | // Constants with initalizers are handled in the next loop. | ||||||
17599 | if (ECD->getInitExpr()) | ||||||
17600 | continue; | ||||||
17601 | |||||||
17602 | // Duplicate values are handled in the next loop. | ||||||
17603 | EnumMap.insert({EnumConstantToKey(ECD), ECD}); | ||||||
17604 | } | ||||||
17605 | |||||||
17606 | if (EnumMap.size() == 0) | ||||||
17607 | return; | ||||||
17608 | |||||||
17609 | // Create vectors for any values that has duplicates. | ||||||
17610 | for (auto *Element : Elements) { | ||||||
17611 | // The last loop returned if any constant was null. | ||||||
17612 | EnumConstantDecl *ECD = cast<EnumConstantDecl>(Element); | ||||||
17613 | if (!ValidDuplicateEnum(ECD, Enum)) | ||||||
17614 | continue; | ||||||
17615 | |||||||
17616 | auto Iter = EnumMap.find(EnumConstantToKey(ECD)); | ||||||
17617 | if (Iter == EnumMap.end()) | ||||||
17618 | continue; | ||||||
17619 | |||||||
17620 | DeclOrVector& Entry = Iter->second; | ||||||
17621 | if (EnumConstantDecl *D = Entry.dyn_cast<EnumConstantDecl*>()) { | ||||||
17622 | // Ensure constants are different. | ||||||
17623 | if (D == ECD) | ||||||
17624 | continue; | ||||||
17625 | |||||||
17626 | // Create new vector and push values onto it. | ||||||
17627 | auto Vec = std::make_unique<ECDVector>(); | ||||||
17628 | Vec->push_back(D); | ||||||
17629 | Vec->push_back(ECD); | ||||||
17630 | |||||||
17631 | // Update entry to point to the duplicates vector. | ||||||
17632 | Entry = Vec.get(); | ||||||
17633 | |||||||
17634 | // Store the vector somewhere we can consult later for quick emission of | ||||||
17635 | // diagnostics. | ||||||
17636 | DupVector.emplace_back(std::move(Vec)); | ||||||
17637 | continue; | ||||||
17638 | } | ||||||
17639 | |||||||
17640 | ECDVector *Vec = Entry.get<ECDVector*>(); | ||||||
17641 | // Make sure constants are not added more than once. | ||||||
17642 | if (*Vec->begin() == ECD) | ||||||
17643 | continue; | ||||||
17644 | |||||||
17645 | Vec->push_back(ECD); | ||||||
17646 | } | ||||||
17647 | |||||||
17648 | // Emit diagnostics. | ||||||
17649 | for (const auto &Vec : DupVector) { | ||||||
17650 | assert(Vec->size() > 1 && "ECDVector should have at least 2 elements.")((Vec->size() > 1 && "ECDVector should have at least 2 elements." ) ? static_cast<void> (0) : __assert_fail ("Vec->size() > 1 && \"ECDVector should have at least 2 elements.\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 17650, __PRETTY_FUNCTION__)); | ||||||
17651 | |||||||
17652 | // Emit warning for one enum constant. | ||||||
17653 | auto *FirstECD = Vec->front(); | ||||||
17654 | S.Diag(FirstECD->getLocation(), diag::warn_duplicate_enum_values) | ||||||
17655 | << FirstECD << FirstECD->getInitVal().toString(10) | ||||||
17656 | << FirstECD->getSourceRange(); | ||||||
17657 | |||||||
17658 | // Emit one note for each of the remaining enum constants with | ||||||
17659 | // the same value. | ||||||
17660 | for (auto *ECD : llvm::make_range(Vec->begin() + 1, Vec->end())) | ||||||
17661 | S.Diag(ECD->getLocation(), diag::note_duplicate_element) | ||||||
17662 | << ECD << ECD->getInitVal().toString(10) | ||||||
17663 | << ECD->getSourceRange(); | ||||||
17664 | } | ||||||
17665 | } | ||||||
17666 | |||||||
17667 | bool Sema::IsValueInFlagEnum(const EnumDecl *ED, const llvm::APInt &Val, | ||||||
17668 | bool AllowMask) const { | ||||||
17669 | assert(ED->isClosedFlag() && "looking for value in non-flag or open enum")((ED->isClosedFlag() && "looking for value in non-flag or open enum" ) ? static_cast<void> (0) : __assert_fail ("ED->isClosedFlag() && \"looking for value in non-flag or open enum\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 17669, __PRETTY_FUNCTION__)); | ||||||
17670 | assert(ED->isCompleteDefinition() && "expected enum definition")((ED->isCompleteDefinition() && "expected enum definition" ) ? static_cast<void> (0) : __assert_fail ("ED->isCompleteDefinition() && \"expected enum definition\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 17670, __PRETTY_FUNCTION__)); | ||||||
17671 | |||||||
17672 | auto R = FlagBitsCache.insert(std::make_pair(ED, llvm::APInt())); | ||||||
17673 | llvm::APInt &FlagBits = R.first->second; | ||||||
17674 | |||||||
17675 | if (R.second) { | ||||||
17676 | for (auto *E : ED->enumerators()) { | ||||||
17677 | const auto &EVal = E->getInitVal(); | ||||||
17678 | // Only single-bit enumerators introduce new flag values. | ||||||
17679 | if (EVal.isPowerOf2()) | ||||||
17680 | FlagBits = FlagBits.zextOrSelf(EVal.getBitWidth()) | EVal; | ||||||
17681 | } | ||||||
17682 | } | ||||||
17683 | |||||||
17684 | // A value is in a flag enum if either its bits are a subset of the enum's | ||||||
17685 | // flag bits (the first condition) or we are allowing masks and the same is | ||||||
17686 | // true of its complement (the second condition). When masks are allowed, we | ||||||
17687 | // allow the common idiom of ~(enum1 | enum2) to be a valid enum value. | ||||||
17688 | // | ||||||
17689 | // While it's true that any value could be used as a mask, the assumption is | ||||||
17690 | // that a mask will have all of the insignificant bits set. Anything else is | ||||||
17691 | // likely a logic error. | ||||||
17692 | llvm::APInt FlagMask = ~FlagBits.zextOrTrunc(Val.getBitWidth()); | ||||||
17693 | return !(FlagMask & Val) || (AllowMask && !(FlagMask & ~Val)); | ||||||
17694 | } | ||||||
17695 | |||||||
17696 | void Sema::ActOnEnumBody(SourceLocation EnumLoc, SourceRange BraceRange, | ||||||
17697 | Decl *EnumDeclX, ArrayRef<Decl *> Elements, Scope *S, | ||||||
17698 | const ParsedAttributesView &Attrs) { | ||||||
17699 | EnumDecl *Enum = cast<EnumDecl>(EnumDeclX); | ||||||
17700 | QualType EnumType = Context.getTypeDeclType(Enum); | ||||||
17701 | |||||||
17702 | ProcessDeclAttributeList(S, Enum, Attrs); | ||||||
17703 | |||||||
17704 | if (Enum->isDependentType()) { | ||||||
17705 | for (unsigned i = 0, e = Elements.size(); i != e; ++i) { | ||||||
17706 | EnumConstantDecl *ECD = | ||||||
17707 | cast_or_null<EnumConstantDecl>(Elements[i]); | ||||||
17708 | if (!ECD) continue; | ||||||
17709 | |||||||
17710 | ECD->setType(EnumType); | ||||||
17711 | } | ||||||
17712 | |||||||
17713 | Enum->completeDefinition(Context.DependentTy, Context.DependentTy, 0, 0); | ||||||
17714 | return; | ||||||
17715 | } | ||||||
17716 | |||||||
17717 | // TODO: If the result value doesn't fit in an int, it must be a long or long | ||||||
17718 | // long value. ISO C does not support this, but GCC does as an extension, | ||||||
17719 | // emit a warning. | ||||||
17720 | unsigned IntWidth = Context.getTargetInfo().getIntWidth(); | ||||||
17721 | unsigned CharWidth = Context.getTargetInfo().getCharWidth(); | ||||||
17722 | unsigned ShortWidth = Context.getTargetInfo().getShortWidth(); | ||||||
17723 | |||||||
17724 | // Verify that all the values are okay, compute the size of the values, and | ||||||
17725 | // reverse the list. | ||||||
17726 | unsigned NumNegativeBits = 0; | ||||||
17727 | unsigned NumPositiveBits = 0; | ||||||
17728 | |||||||
17729 | // Keep track of whether all elements have type int. | ||||||
17730 | bool AllElementsInt = true; | ||||||
17731 | |||||||
17732 | for (unsigned i = 0, e = Elements.size(); i != e; ++i) { | ||||||
17733 | EnumConstantDecl *ECD = | ||||||
17734 | cast_or_null<EnumConstantDecl>(Elements[i]); | ||||||
17735 | if (!ECD) continue; // Already issued a diagnostic. | ||||||
17736 | |||||||
17737 | const llvm::APSInt &InitVal = ECD->getInitVal(); | ||||||
17738 | |||||||
17739 | // Keep track of the size of positive and negative values. | ||||||
17740 | if (InitVal.isUnsigned() || InitVal.isNonNegative()) | ||||||
17741 | NumPositiveBits = std::max(NumPositiveBits, | ||||||
17742 | (unsigned)InitVal.getActiveBits()); | ||||||
17743 | else | ||||||
17744 | NumNegativeBits = std::max(NumNegativeBits, | ||||||
17745 | (unsigned)InitVal.getMinSignedBits()); | ||||||
17746 | |||||||
17747 | // Keep track of whether every enum element has type int (very common). | ||||||
17748 | if (AllElementsInt) | ||||||
17749 | AllElementsInt = ECD->getType() == Context.IntTy; | ||||||
17750 | } | ||||||
17751 | |||||||
17752 | // Figure out the type that should be used for this enum. | ||||||
17753 | QualType BestType; | ||||||
17754 | unsigned BestWidth; | ||||||
17755 | |||||||
17756 | // C++0x N3000 [conv.prom]p3: | ||||||
17757 | // An rvalue of an unscoped enumeration type whose underlying | ||||||
17758 | // type is not fixed can be converted to an rvalue of the first | ||||||
17759 | // of the following types that can represent all the values of | ||||||
17760 | // the enumeration: int, unsigned int, long int, unsigned long | ||||||
17761 | // int, long long int, or unsigned long long int. | ||||||
17762 | // C99 6.4.4.3p2: | ||||||
17763 | // An identifier declared as an enumeration constant has type int. | ||||||
17764 | // The C99 rule is modified by a gcc extension | ||||||
17765 | QualType BestPromotionType; | ||||||
17766 | |||||||
17767 | bool Packed = Enum->hasAttr<PackedAttr>(); | ||||||
17768 | // -fshort-enums is the equivalent to specifying the packed attribute on all | ||||||
17769 | // enum definitions. | ||||||
17770 | if (LangOpts.ShortEnums) | ||||||
17771 | Packed = true; | ||||||
17772 | |||||||
17773 | // If the enum already has a type because it is fixed or dictated by the | ||||||
17774 | // target, promote that type instead of analyzing the enumerators. | ||||||
17775 | if (Enum->isComplete()) { | ||||||
17776 | BestType = Enum->getIntegerType(); | ||||||
17777 | if (BestType->isPromotableIntegerType()) | ||||||
17778 | BestPromotionType = Context.getPromotedIntegerType(BestType); | ||||||
17779 | else | ||||||
17780 | BestPromotionType = BestType; | ||||||
17781 | |||||||
17782 | BestWidth = Context.getIntWidth(BestType); | ||||||
17783 | } | ||||||
17784 | else if (NumNegativeBits) { | ||||||
17785 | // If there is a negative value, figure out the smallest integer type (of | ||||||
17786 | // int/long/longlong) that fits. | ||||||
17787 | // If it's packed, check also if it fits a char or a short. | ||||||
17788 | if (Packed && NumNegativeBits <= CharWidth && NumPositiveBits < CharWidth) { | ||||||
17789 | BestType = Context.SignedCharTy; | ||||||
17790 | BestWidth = CharWidth; | ||||||
17791 | } else if (Packed && NumNegativeBits <= ShortWidth && | ||||||
17792 | NumPositiveBits < ShortWidth) { | ||||||
17793 | BestType = Context.ShortTy; | ||||||
17794 | BestWidth = ShortWidth; | ||||||
17795 | } else if (NumNegativeBits <= IntWidth && NumPositiveBits < IntWidth) { | ||||||
17796 | BestType = Context.IntTy; | ||||||
17797 | BestWidth = IntWidth; | ||||||
17798 | } else { | ||||||
17799 | BestWidth = Context.getTargetInfo().getLongWidth(); | ||||||
17800 | |||||||
17801 | if (NumNegativeBits <= BestWidth && NumPositiveBits < BestWidth) { | ||||||
17802 | BestType = Context.LongTy; | ||||||
17803 | } else { | ||||||
17804 | BestWidth = Context.getTargetInfo().getLongLongWidth(); | ||||||
17805 | |||||||
17806 | if (NumNegativeBits > BestWidth || NumPositiveBits >= BestWidth) | ||||||
17807 | Diag(Enum->getLocation(), diag::ext_enum_too_large); | ||||||
17808 | BestType = Context.LongLongTy; | ||||||
17809 | } | ||||||
17810 | } | ||||||
17811 | BestPromotionType = (BestWidth <= IntWidth ? Context.IntTy : BestType); | ||||||
17812 | } else { | ||||||
17813 | // If there is no negative value, figure out the smallest type that fits | ||||||
17814 | // all of the enumerator values. | ||||||
17815 | // If it's packed, check also if it fits a char or a short. | ||||||
17816 | if (Packed && NumPositiveBits <= CharWidth) { | ||||||
17817 | BestType = Context.UnsignedCharTy; | ||||||
17818 | BestPromotionType = Context.IntTy; | ||||||
17819 | BestWidth = CharWidth; | ||||||
17820 | } else if (Packed && NumPositiveBits <= ShortWidth) { | ||||||
17821 | BestType = Context.UnsignedShortTy; | ||||||
17822 | BestPromotionType = Context.IntTy; | ||||||
17823 | BestWidth = ShortWidth; | ||||||
17824 | } else if (NumPositiveBits <= IntWidth) { | ||||||
17825 | BestType = Context.UnsignedIntTy; | ||||||
17826 | BestWidth = IntWidth; | ||||||
17827 | BestPromotionType | ||||||
17828 | = (NumPositiveBits == BestWidth || !getLangOpts().CPlusPlus) | ||||||
17829 | ? Context.UnsignedIntTy : Context.IntTy; | ||||||
17830 | } else if (NumPositiveBits <= | ||||||
17831 | (BestWidth = Context.getTargetInfo().getLongWidth())) { | ||||||
17832 | BestType = Context.UnsignedLongTy; | ||||||
17833 | BestPromotionType | ||||||
17834 | = (NumPositiveBits == BestWidth || !getLangOpts().CPlusPlus) | ||||||
17835 | ? Context.UnsignedLongTy : Context.LongTy; | ||||||
17836 | } else { | ||||||
17837 | BestWidth = Context.getTargetInfo().getLongLongWidth(); | ||||||
17838 | assert(NumPositiveBits <= BestWidth &&((NumPositiveBits <= BestWidth && "How could an initializer get larger than ULL?" ) ? static_cast<void> (0) : __assert_fail ("NumPositiveBits <= BestWidth && \"How could an initializer get larger than ULL?\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 17839, __PRETTY_FUNCTION__)) | ||||||
17839 | "How could an initializer get larger than ULL?")((NumPositiveBits <= BestWidth && "How could an initializer get larger than ULL?" ) ? static_cast<void> (0) : __assert_fail ("NumPositiveBits <= BestWidth && \"How could an initializer get larger than ULL?\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/Sema/SemaDecl.cpp" , 17839, __PRETTY_FUNCTION__)); | ||||||
17840 | BestType = Context.UnsignedLongLongTy; | ||||||
17841 | BestPromotionType | ||||||
17842 | = (NumPositiveBits == BestWidth || !getLangOpts().CPlusPlus) | ||||||
17843 | ? Context.UnsignedLongLongTy : Context.LongLongTy; | ||||||
17844 | } | ||||||
17845 | } | ||||||
17846 | |||||||
17847 | // Loop over all of the enumerator constants, changing their types to match | ||||||
17848 | // the type of the enum if needed. | ||||||
17849 | for (auto *D : Elements) { | ||||||
17850 | auto *ECD = cast_or_null<EnumConstantDecl>(D); | ||||||
17851 | if (!ECD) continue; // Already issued a diagnostic. | ||||||
17852 | |||||||
17853 | // Standard C says the enumerators have int type, but we allow, as an | ||||||
17854 | // extension, the enumerators to be larger than int size. If each | ||||||
17855 | // enumerator value fits in an int, type it as an int, otherwise type it the | ||||||
17856 | // same as the enumerator decl itself. This means that in "enum { X = 1U }" | ||||||
17857 | // that X has type 'int', not 'unsigned'. | ||||||
17858 | |||||||
17859 | // Determine whether the value fits into an int. | ||||||
17860 | llvm::APSInt InitVal = ECD->getInitVal(); | ||||||
17861 | |||||||
17862 | // If it fits into an integer type, force it. Otherwise force it to match | ||||||
17863 | // the enum decl type. | ||||||
17864 | QualType NewTy; | ||||||
17865 | unsigned NewWidth; | ||||||
17866 | bool NewSign; | ||||||
17867 | if (!getLangOpts().CPlusPlus && | ||||||
17868 | !Enum->isFixed() && | ||||||
17869 | isRepresentableIntegerValue(Context, InitVal, Context.IntTy)) { | ||||||
17870 | NewTy = Context.IntTy; | ||||||
17871 | NewWidth = IntWidth; | ||||||
17872 | NewSign = true; | ||||||
17873 | } else if (ECD->getType() == BestType) { | ||||||
17874 | // Already the right type! | ||||||
17875 | if (getLangOpts().CPlusPlus) | ||||||
17876 | // C++ [dcl.enum]p4: Following the closing brace of an | ||||||
17877 | // enum-specifier, each enumerator has the type of its | ||||||
17878 | // enumeration. | ||||||
17879 | ECD->setType(EnumType); | ||||||
17880 | continue; | ||||||
17881 | } else { | ||||||
17882 | NewTy = BestType; | ||||||
17883 | NewWidth = BestWidth; | ||||||
17884 | NewSign = BestType->isSignedIntegerOrEnumerationType(); | ||||||
17885 | } | ||||||
17886 | |||||||
17887 | // Adjust the APSInt value. | ||||||
17888 | InitVal = InitVal.extOrTrunc(NewWidth); | ||||||
17889 | InitVal.setIsSigned(NewSign); | ||||||
17890 | ECD->setInitVal(InitVal); | ||||||
17891 | |||||||
17892 | // Adjust the Expr initializer and type. | ||||||
17893 | if (ECD->getInitExpr() && | ||||||
17894 | !Context.hasSameType(NewTy, ECD->getInitExpr()->getType())) | ||||||
17895 | ECD->setInitExpr(ImplicitCastExpr::Create(Context, NewTy, | ||||||
17896 | CK_IntegralCast, | ||||||
17897 | ECD->getInitExpr(), | ||||||
17898 | /*base paths*/ nullptr, | ||||||
17899 | VK_RValue)); | ||||||
17900 | if (getLangOpts().CPlusPlus) | ||||||
17901 | // C++ [dcl.enum]p4: Following the closing brace of an | ||||||
17902 | // enum-specifier, each enumerator has the type of its | ||||||
17903 | // enumeration. | ||||||
17904 | ECD->setType(EnumType); | ||||||
17905 | else | ||||||
17906 | ECD->setType(NewTy); | ||||||
17907 | } | ||||||
17908 | |||||||
17909 | Enum->completeDefinition(BestType, BestPromotionType, | ||||||
17910 | NumPositiveBits, NumNegativeBits); | ||||||
17911 | |||||||
17912 | CheckForDuplicateEnumValues(*this, Elements, Enum, EnumType); | ||||||
17913 | |||||||
17914 | if (Enum->isClosedFlag()) { | ||||||
17915 | for (Decl *D : Elements) { | ||||||
17916 | EnumConstantDecl *ECD = cast_or_null<EnumConstantDecl>(D); | ||||||
17917 | if (!ECD) continue; // Already issued a diagnostic. | ||||||
17918 | |||||||
17919 | llvm::APSInt InitVal = ECD->getInitVal(); | ||||||
17920 | if (InitVal != 0 && !InitVal.isPowerOf2() && | ||||||
17921 | !IsValueInFlagEnum(Enum, InitVal, true)) | ||||||
17922 | Diag(ECD->getLocation(), diag::warn_flag_enum_constant_out_of_range) | ||||||
17923 | << ECD << Enum; | ||||||
17924 | } | ||||||
17925 | } | ||||||
17926 | |||||||
17927 | // Now that the enum type is defined, ensure it's not been underaligned. | ||||||
17928 | if (Enum->hasAttrs()) | ||||||
17929 | CheckAlignasUnderalignment(Enum); | ||||||
17930 | } | ||||||
17931 | |||||||
17932 | Decl *Sema::ActOnFileScopeAsmDecl(Expr *expr, | ||||||
17933 | SourceLocation StartLoc, | ||||||
17934 | SourceLocation EndLoc) { | ||||||
17935 | StringLiteral *AsmString = cast<StringLiteral>(expr); | ||||||
17936 | |||||||
17937 | FileScopeAsmDecl *New = FileScopeAsmDecl::Create(Context, CurContext, | ||||||
17938 | AsmString, StartLoc, | ||||||
17939 | EndLoc); | ||||||
17940 | CurContext->addDecl(New); | ||||||
17941 | return New; | ||||||
17942 | } | ||||||
17943 | |||||||
17944 | void Sema::ActOnPragmaRedefineExtname(IdentifierInfo* Name, | ||||||
17945 | IdentifierInfo* AliasName, | ||||||
17946 | SourceLocation PragmaLoc, | ||||||
17947 | SourceLocation NameLoc, | ||||||
17948 | SourceLocation AliasNameLoc) { | ||||||
17949 | NamedDecl *PrevDecl = LookupSingleName(TUScope, Name, NameLoc, | ||||||
17950 | LookupOrdinaryName); | ||||||
17951 | AttributeCommonInfo Info(AliasName, SourceRange(AliasNameLoc), | ||||||
17952 | AttributeCommonInfo::AS_Pragma); | ||||||
17953 | AsmLabelAttr *Attr = AsmLabelAttr::CreateImplicit( | ||||||
17954 | Context, AliasName->getName(), /*LiteralLabel=*/true, Info); | ||||||
17955 | |||||||
17956 | // If a declaration that: | ||||||
17957 | // 1) declares a function or a variable | ||||||
17958 | // 2) has external linkage | ||||||
17959 | // already exists, add a label attribute to it. | ||||||
17960 | if (PrevDecl && (isa<FunctionDecl>(PrevDecl) || isa<VarDecl>(PrevDecl))) { | ||||||
17961 | if (isDeclExternC(PrevDecl)) | ||||||
17962 | PrevDecl->addAttr(Attr); | ||||||
17963 | else | ||||||
17964 | Diag(PrevDecl->getLocation(), diag::warn_redefine_extname_not_applied) | ||||||
17965 | << /*Variable*/(isa<FunctionDecl>(PrevDecl) ? 0 : 1) << PrevDecl; | ||||||
17966 | // Otherwise, add a label atttibute to ExtnameUndeclaredIdentifiers. | ||||||
17967 | } else | ||||||
17968 | (void)ExtnameUndeclaredIdentifiers.insert(std::make_pair(Name, Attr)); | ||||||
17969 | } | ||||||
17970 | |||||||
17971 | void Sema::ActOnPragmaWeakID(IdentifierInfo* Name, | ||||||
17972 | SourceLocation PragmaLoc, | ||||||
17973 | SourceLocation NameLoc) { | ||||||
17974 | Decl *PrevDecl = LookupSingleName(TUScope, Name, NameLoc, LookupOrdinaryName); | ||||||
17975 | |||||||
17976 | if (PrevDecl) { | ||||||
17977 | PrevDecl->addAttr(WeakAttr::CreateImplicit(Context, PragmaLoc, AttributeCommonInfo::AS_Pragma)); | ||||||
17978 | } else { | ||||||
17979 | (void)WeakUndeclaredIdentifiers.insert( | ||||||
17980 | std::pair<IdentifierInfo*,WeakInfo> | ||||||
17981 | (Name, WeakInfo((IdentifierInfo*)nullptr, NameLoc))); | ||||||
17982 | } | ||||||
17983 | } | ||||||
17984 | |||||||
17985 | void Sema::ActOnPragmaWeakAlias(IdentifierInfo* Name, | ||||||
17986 | IdentifierInfo* AliasName, | ||||||
17987 | SourceLocation PragmaLoc, | ||||||
17988 | SourceLocation NameLoc, | ||||||
17989 | SourceLocation AliasNameLoc) { | ||||||
17990 | Decl *PrevDecl = LookupSingleName(TUScope, AliasName, AliasNameLoc, | ||||||
17991 | LookupOrdinaryName); | ||||||
17992 | WeakInfo W = WeakInfo(Name, NameLoc); | ||||||
17993 | |||||||
17994 | if (PrevDecl && (isa<FunctionDecl>(PrevDecl) || isa<VarDecl>(PrevDecl))) { | ||||||
17995 | if (!PrevDecl->hasAttr<AliasAttr>()) | ||||||
17996 | if (NamedDecl *ND = dyn_cast<NamedDecl>(PrevDecl)) | ||||||
17997 | DeclApplyPragmaWeak(TUScope, ND, W); | ||||||
17998 | } else { | ||||||
17999 | (void)WeakUndeclaredIdentifiers.insert( | ||||||
18000 | std::pair<IdentifierInfo*,WeakInfo>(AliasName, W)); | ||||||
18001 | } | ||||||
18002 | } | ||||||
18003 | |||||||
18004 | Decl *Sema::getObjCDeclContext() const { | ||||||
18005 | return (dyn_cast_or_null<ObjCContainerDecl>(CurContext)); | ||||||
18006 | } | ||||||
18007 | |||||||
18008 | Sema::FunctionEmissionStatus Sema::getEmissionStatus(FunctionDecl *FD) { | ||||||
18009 | // Templates are emitted when they're instantiated. | ||||||
18010 | if (FD->isDependentContext()) | ||||||
18011 | return FunctionEmissionStatus::TemplateDiscarded; | ||||||
18012 | |||||||
18013 | FunctionEmissionStatus OMPES = FunctionEmissionStatus::Unknown; | ||||||
18014 | if (LangOpts.OpenMPIsDevice) { | ||||||
18015 | Optional<OMPDeclareTargetDeclAttr::DevTypeTy> DevTy = | ||||||
18016 | OMPDeclareTargetDeclAttr::getDeviceType(FD->getCanonicalDecl()); | ||||||
18017 | if (DevTy.hasValue()) { | ||||||
18018 | if (*DevTy == OMPDeclareTargetDeclAttr::DT_Host) | ||||||
18019 | OMPES = FunctionEmissionStatus::OMPDiscarded; | ||||||
18020 | else if (DeviceKnownEmittedFns.count(FD) > 0) | ||||||
18021 | OMPES = FunctionEmissionStatus::Emitted; | ||||||
18022 | } | ||||||
18023 | } else if (LangOpts.OpenMP) { | ||||||
18024 | // In OpenMP 4.5 all the functions are host functions. | ||||||
18025 | if (LangOpts.OpenMP <= 45) { | ||||||
18026 | OMPES = FunctionEmissionStatus::Emitted; | ||||||
18027 | } else { | ||||||
18028 | Optional<OMPDeclareTargetDeclAttr::DevTypeTy> DevTy = | ||||||
18029 | OMPDeclareTargetDeclAttr::getDeviceType(FD->getCanonicalDecl()); | ||||||
18030 | // In OpenMP 5.0 or above, DevTy may be changed later by | ||||||
18031 | // #pragma omp declare target to(*) device_type(*). Therefore DevTy | ||||||
18032 | // having no value does not imply host. The emission status will be | ||||||
18033 | // checked again at the end of compilation unit. | ||||||
18034 | if (DevTy.hasValue()) { | ||||||
18035 | if (*DevTy == OMPDeclareTargetDeclAttr::DT_NoHost) { | ||||||
18036 | OMPES = FunctionEmissionStatus::OMPDiscarded; | ||||||
18037 | } else if (DeviceKnownEmittedFns.count(FD) > 0) { | ||||||
18038 | OMPES = FunctionEmissionStatus::Emitted; | ||||||
18039 | } | ||||||
18040 | } | ||||||
18041 | } | ||||||
18042 | } | ||||||
18043 | if (OMPES == FunctionEmissionStatus::OMPDiscarded || | ||||||
18044 | (OMPES == FunctionEmissionStatus::Emitted && !LangOpts.CUDA)) | ||||||
18045 | return OMPES; | ||||||
18046 | |||||||
18047 | if (LangOpts.CUDA) { | ||||||
18048 | // When compiling for device, host functions are never emitted. Similarly, | ||||||
18049 | // when compiling for host, device and global functions are never emitted. | ||||||
18050 | // (Technically, we do emit a host-side stub for global functions, but this | ||||||
18051 | // doesn't count for our purposes here.) | ||||||
18052 | Sema::CUDAFunctionTarget T = IdentifyCUDATarget(FD); | ||||||
18053 | if (LangOpts.CUDAIsDevice && T == Sema::CFT_Host) | ||||||
18054 | return FunctionEmissionStatus::CUDADiscarded; | ||||||
18055 | if (!LangOpts.CUDAIsDevice && | ||||||
18056 | (T == Sema::CFT_Device || T == Sema::CFT_Global)) | ||||||
18057 | return FunctionEmissionStatus::CUDADiscarded; | ||||||
18058 | |||||||
18059 | // Check whether this function is externally visible -- if so, it's | ||||||
18060 | // known-emitted. | ||||||
18061 | // | ||||||
18062 | // We have to check the GVA linkage of the function's *definition* -- if we | ||||||
18063 | // only have a declaration, we don't know whether or not the function will | ||||||
18064 | // be emitted, because (say) the definition could include "inline". | ||||||
18065 | FunctionDecl *Def = FD->getDefinition(); | ||||||
18066 | |||||||
18067 | if (Def && | ||||||
18068 | !isDiscardableGVALinkage(getASTContext().GetGVALinkageForFunction(Def)) | ||||||
18069 | && (!LangOpts.OpenMP || OMPES == FunctionEmissionStatus::Emitted)) | ||||||
18070 | return FunctionEmissionStatus::Emitted; | ||||||
18071 | } | ||||||
18072 | |||||||
18073 | // Otherwise, the function is known-emitted if it's in our set of | ||||||
18074 | // known-emitted functions. | ||||||
18075 | return (DeviceKnownEmittedFns.count(FD) > 0) | ||||||
18076 | ? FunctionEmissionStatus::Emitted | ||||||
18077 | : FunctionEmissionStatus::Unknown; | ||||||
18078 | } | ||||||
18079 | |||||||
18080 | bool Sema::shouldIgnoreInHostDeviceCheck(FunctionDecl *Callee) { | ||||||
18081 | // Host-side references to a __global__ function refer to the stub, so the | ||||||
18082 | // function itself is never emitted and therefore should not be marked. | ||||||
18083 | // If we have host fn calls kernel fn calls host+device, the HD function | ||||||
18084 | // does not get instantiated on the host. We model this by omitting at the | ||||||
18085 | // call to the kernel from the callgraph. This ensures that, when compiling | ||||||
18086 | // for host, only HD functions actually called from the host get marked as | ||||||
18087 | // known-emitted. | ||||||
18088 | return LangOpts.CUDA && !LangOpts.CUDAIsDevice && | ||||||
18089 | IdentifyCUDATarget(Callee) == CFT_Global; | ||||||
18090 | } |
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/NestedNameSpecifier.h" |
27 | #include "clang/Basic/ExceptionSpecificationType.h" |
28 | #include "clang/Basic/Lambda.h" |
29 | #include "clang/Basic/OperatorKinds.h" |
30 | #include "clang/Basic/Specifiers.h" |
31 | #include "clang/Lex/Token.h" |
32 | #include "clang/Sema/Ownership.h" |
33 | #include "clang/Sema/ParsedAttr.h" |
34 | #include "llvm/ADT/SmallVector.h" |
35 | #include "llvm/Support/Compiler.h" |
36 | #include "llvm/Support/ErrorHandling.h" |
37 | |
38 | namespace clang { |
39 | class ASTContext; |
40 | class CXXRecordDecl; |
41 | class TypeLoc; |
42 | class LangOptions; |
43 | class IdentifierInfo; |
44 | class NamespaceAliasDecl; |
45 | class NamespaceDecl; |
46 | class ObjCDeclSpec; |
47 | class Sema; |
48 | class Declarator; |
49 | struct TemplateIdAnnotation; |
50 | |
51 | /// Represents a C++ nested-name-specifier or a global scope specifier. |
52 | /// |
53 | /// These can be in 3 states: |
54 | /// 1) Not present, identified by isEmpty() |
55 | /// 2) Present, identified by isNotEmpty() |
56 | /// 2.a) Valid, identified by isValid() |
57 | /// 2.b) Invalid, identified by isInvalid(). |
58 | /// |
59 | /// isSet() is deprecated because it mostly corresponded to "valid" but was |
60 | /// often used as if it meant "present". |
61 | /// |
62 | /// The actual scope is described by getScopeRep(). |
63 | class CXXScopeSpec { |
64 | SourceRange Range; |
65 | NestedNameSpecifierLocBuilder Builder; |
66 | |
67 | public: |
68 | SourceRange getRange() const { return Range; } |
69 | void setRange(SourceRange R) { Range = R; } |
70 | void setBeginLoc(SourceLocation Loc) { Range.setBegin(Loc); } |
71 | void setEndLoc(SourceLocation Loc) { Range.setEnd(Loc); } |
72 | SourceLocation getBeginLoc() const { return Range.getBegin(); } |
73 | SourceLocation getEndLoc() const { return Range.getEnd(); } |
74 | |
75 | /// Retrieve the representation of the nested-name-specifier. |
76 | NestedNameSpecifier *getScopeRep() const { |
77 | return Builder.getRepresentation(); |
78 | } |
79 | |
80 | /// Extend the current nested-name-specifier by another |
81 | /// nested-name-specifier component of the form 'type::'. |
82 | /// |
83 | /// \param Context The AST context in which this nested-name-specifier |
84 | /// resides. |
85 | /// |
86 | /// \param TemplateKWLoc The location of the 'template' keyword, if present. |
87 | /// |
88 | /// \param TL The TypeLoc that describes the type preceding the '::'. |
89 | /// |
90 | /// \param ColonColonLoc The location of the trailing '::'. |
91 | void Extend(ASTContext &Context, SourceLocation TemplateKWLoc, TypeLoc TL, |
92 | SourceLocation ColonColonLoc); |
93 | |
94 | /// Extend the current nested-name-specifier by another |
95 | /// nested-name-specifier component of the form 'identifier::'. |
96 | /// |
97 | /// \param Context The AST context in which this nested-name-specifier |
98 | /// resides. |
99 | /// |
100 | /// \param Identifier The identifier. |
101 | /// |
102 | /// \param IdentifierLoc The location of the identifier. |
103 | /// |
104 | /// \param ColonColonLoc The location of the trailing '::'. |
105 | void Extend(ASTContext &Context, IdentifierInfo *Identifier, |
106 | SourceLocation IdentifierLoc, SourceLocation ColonColonLoc); |
107 | |
108 | /// Extend the current nested-name-specifier by another |
109 | /// nested-name-specifier component of the form 'namespace::'. |
110 | /// |
111 | /// \param Context The AST context in which this nested-name-specifier |
112 | /// resides. |
113 | /// |
114 | /// \param Namespace The namespace. |
115 | /// |
116 | /// \param NamespaceLoc The location of the namespace name. |
117 | /// |
118 | /// \param ColonColonLoc The location of the trailing '::'. |
119 | void Extend(ASTContext &Context, NamespaceDecl *Namespace, |
120 | SourceLocation NamespaceLoc, SourceLocation ColonColonLoc); |
121 | |
122 | /// Extend the current nested-name-specifier by another |
123 | /// nested-name-specifier component of the form 'namespace-alias::'. |
124 | /// |
125 | /// \param Context The AST context in which this nested-name-specifier |
126 | /// resides. |
127 | /// |
128 | /// \param Alias The namespace alias. |
129 | /// |
130 | /// \param AliasLoc The location of the namespace alias |
131 | /// name. |
132 | /// |
133 | /// \param ColonColonLoc The location of the trailing '::'. |
134 | void Extend(ASTContext &Context, NamespaceAliasDecl *Alias, |
135 | SourceLocation AliasLoc, SourceLocation ColonColonLoc); |
136 | |
137 | /// Turn this (empty) nested-name-specifier into the global |
138 | /// nested-name-specifier '::'. |
139 | void MakeGlobal(ASTContext &Context, SourceLocation ColonColonLoc); |
140 | |
141 | /// Turns this (empty) nested-name-specifier into '__super' |
142 | /// nested-name-specifier. |
143 | /// |
144 | /// \param Context The AST context in which this nested-name-specifier |
145 | /// resides. |
146 | /// |
147 | /// \param RD The declaration of the class in which nested-name-specifier |
148 | /// appeared. |
149 | /// |
150 | /// \param SuperLoc The location of the '__super' keyword. |
151 | /// name. |
152 | /// |
153 | /// \param ColonColonLoc The location of the trailing '::'. |
154 | void MakeSuper(ASTContext &Context, CXXRecordDecl *RD, |
155 | SourceLocation SuperLoc, SourceLocation ColonColonLoc); |
156 | |
157 | /// Make a new nested-name-specifier from incomplete source-location |
158 | /// information. |
159 | /// |
160 | /// FIXME: This routine should be used very, very rarely, in cases where we |
161 | /// need to synthesize a nested-name-specifier. Most code should instead use |
162 | /// \c Adopt() with a proper \c NestedNameSpecifierLoc. |
163 | void MakeTrivial(ASTContext &Context, NestedNameSpecifier *Qualifier, |
164 | SourceRange R); |
165 | |
166 | /// Adopt an existing nested-name-specifier (with source-range |
167 | /// information). |
168 | void Adopt(NestedNameSpecifierLoc Other); |
169 | |
170 | /// Retrieve a nested-name-specifier with location information, copied |
171 | /// into the given AST context. |
172 | /// |
173 | /// \param Context The context into which this nested-name-specifier will be |
174 | /// copied. |
175 | NestedNameSpecifierLoc getWithLocInContext(ASTContext &Context) const; |
176 | |
177 | /// Retrieve the location of the name in the last qualifier |
178 | /// in this nested name specifier. |
179 | /// |
180 | /// For example, the location of \c bar |
181 | /// in |
182 | /// \verbatim |
183 | /// \::foo::bar<0>:: |
184 | /// ^~~ |
185 | /// \endverbatim |
186 | SourceLocation getLastQualifierNameLoc() const; |
187 | |
188 | /// No scope specifier. |
189 | bool isEmpty() const { return !Range.isValid(); } |
190 | /// A scope specifier is present, but may be valid or invalid. |
191 | bool isNotEmpty() const { return !isEmpty(); } |
192 | |
193 | /// An error occurred during parsing of the scope specifier. |
194 | bool isInvalid() const { return isNotEmpty() && getScopeRep() == nullptr; } |
195 | /// A scope specifier is present, and it refers to a real scope. |
196 | bool isValid() const { return isNotEmpty() && getScopeRep() != nullptr; } |
197 | |
198 | /// Indicate that this nested-name-specifier is invalid. |
199 | void SetInvalid(SourceRange R) { |
200 | assert(R.isValid() && "Must have a valid source range")((R.isValid() && "Must have a valid source range") ? static_cast <void> (0) : __assert_fail ("R.isValid() && \"Must have a valid source range\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Sema/DeclSpec.h" , 200, __PRETTY_FUNCTION__)); |
201 | if (Range.getBegin().isInvalid()) |
202 | Range.setBegin(R.getBegin()); |
203 | Range.setEnd(R.getEnd()); |
204 | Builder.Clear(); |
205 | } |
206 | |
207 | /// Deprecated. Some call sites intend isNotEmpty() while others intend |
208 | /// isValid(). |
209 | bool isSet() const { return getScopeRep() != nullptr; } |
210 | |
211 | void clear() { |
212 | Range = SourceRange(); |
213 | Builder.Clear(); |
214 | } |
215 | |
216 | /// Retrieve the data associated with the source-location information. |
217 | char *location_data() const { return Builder.getBuffer().first; } |
218 | |
219 | /// Retrieve the size of the data associated with source-location |
220 | /// information. |
221 | unsigned location_size() const { return Builder.getBuffer().second; } |
222 | }; |
223 | |
224 | /// Captures information about "declaration specifiers". |
225 | /// |
226 | /// "Declaration specifiers" encompasses storage-class-specifiers, |
227 | /// type-specifiers, type-qualifiers, and function-specifiers. |
228 | class DeclSpec { |
229 | public: |
230 | /// storage-class-specifier |
231 | /// \note The order of these enumerators is important for diagnostics. |
232 | enum SCS { |
233 | SCS_unspecified = 0, |
234 | SCS_typedef, |
235 | SCS_extern, |
236 | SCS_static, |
237 | SCS_auto, |
238 | SCS_register, |
239 | SCS_private_extern, |
240 | SCS_mutable |
241 | }; |
242 | |
243 | // Import thread storage class specifier enumeration and constants. |
244 | // These can be combined with SCS_extern and SCS_static. |
245 | typedef ThreadStorageClassSpecifier TSCS; |
246 | static const TSCS TSCS_unspecified = clang::TSCS_unspecified; |
247 | static const TSCS TSCS___thread = clang::TSCS___thread; |
248 | static const TSCS TSCS_thread_local = clang::TSCS_thread_local; |
249 | static const TSCS TSCS__Thread_local = clang::TSCS__Thread_local; |
250 | |
251 | // Import type specifier width enumeration and constants. |
252 | typedef TypeSpecifierWidth TSW; |
253 | static const TSW TSW_unspecified = clang::TSW_unspecified; |
254 | static const TSW TSW_short = clang::TSW_short; |
255 | static const TSW TSW_long = clang::TSW_long; |
256 | static const TSW TSW_longlong = clang::TSW_longlong; |
257 | |
258 | enum TSC { |
259 | TSC_unspecified, |
260 | TSC_imaginary, |
261 | TSC_complex |
262 | }; |
263 | |
264 | // Import type specifier sign enumeration and constants. |
265 | typedef TypeSpecifierSign TSS; |
266 | static const TSS TSS_unspecified = clang::TSS_unspecified; |
267 | static const TSS TSS_signed = clang::TSS_signed; |
268 | static const TSS TSS_unsigned = clang::TSS_unsigned; |
269 | |
270 | // Import type specifier type enumeration and constants. |
271 | typedef TypeSpecifierType TST; |
272 | static const TST TST_unspecified = clang::TST_unspecified; |
273 | static const TST TST_void = clang::TST_void; |
274 | static const TST TST_char = clang::TST_char; |
275 | static const TST TST_wchar = clang::TST_wchar; |
276 | static const TST TST_char8 = clang::TST_char8; |
277 | static const TST TST_char16 = clang::TST_char16; |
278 | static const TST TST_char32 = clang::TST_char32; |
279 | static const TST TST_int = clang::TST_int; |
280 | static const TST TST_int128 = clang::TST_int128; |
281 | static const TST TST_half = clang::TST_half; |
282 | static const TST TST_float = clang::TST_float; |
283 | static const TST TST_double = clang::TST_double; |
284 | static const TST TST_float16 = clang::TST_Float16; |
285 | static const TST TST_accum = clang::TST_Accum; |
286 | static const TST TST_fract = clang::TST_Fract; |
287 | static const TST TST_float128 = clang::TST_float128; |
288 | static const TST TST_bool = clang::TST_bool; |
289 | static const TST TST_decimal32 = clang::TST_decimal32; |
290 | static const TST TST_decimal64 = clang::TST_decimal64; |
291 | static const TST TST_decimal128 = clang::TST_decimal128; |
292 | static const TST TST_enum = clang::TST_enum; |
293 | static const TST TST_union = clang::TST_union; |
294 | static const TST TST_struct = clang::TST_struct; |
295 | static const TST TST_interface = clang::TST_interface; |
296 | static const TST TST_class = clang::TST_class; |
297 | static const TST TST_typename = clang::TST_typename; |
298 | static const TST TST_typeofType = clang::TST_typeofType; |
299 | static const TST TST_typeofExpr = clang::TST_typeofExpr; |
300 | static const TST TST_decltype = clang::TST_decltype; |
301 | static const TST TST_decltype_auto = clang::TST_decltype_auto; |
302 | static const TST TST_underlyingType = clang::TST_underlyingType; |
303 | static const TST TST_auto = clang::TST_auto; |
304 | static const TST TST_auto_type = clang::TST_auto_type; |
305 | static const TST TST_unknown_anytype = clang::TST_unknown_anytype; |
306 | static const TST TST_atomic = clang::TST_atomic; |
307 | #define GENERIC_IMAGE_TYPE(ImgType, Id) \ |
308 | static const TST TST_##ImgType##_t = clang::TST_##ImgType##_t; |
309 | #include "clang/Basic/OpenCLImageTypes.def" |
310 | static const TST TST_error = clang::TST_error; |
311 | |
312 | // type-qualifiers |
313 | enum TQ { // NOTE: These flags must be kept in sync with Qualifiers::TQ. |
314 | TQ_unspecified = 0, |
315 | TQ_const = 1, |
316 | TQ_restrict = 2, |
317 | TQ_volatile = 4, |
318 | TQ_unaligned = 8, |
319 | // This has no corresponding Qualifiers::TQ value, because it's not treated |
320 | // as a qualifier in our type system. |
321 | TQ_atomic = 16 |
322 | }; |
323 | |
324 | /// ParsedSpecifiers - Flags to query which specifiers were applied. This is |
325 | /// returned by getParsedSpecifiers. |
326 | enum ParsedSpecifiers { |
327 | PQ_None = 0, |
328 | PQ_StorageClassSpecifier = 1, |
329 | PQ_TypeSpecifier = 2, |
330 | PQ_TypeQualifier = 4, |
331 | PQ_FunctionSpecifier = 8 |
332 | // FIXME: Attributes should be included here. |
333 | }; |
334 | |
335 | private: |
336 | // storage-class-specifier |
337 | /*SCS*/unsigned StorageClassSpec : 3; |
338 | /*TSCS*/unsigned ThreadStorageClassSpec : 2; |
339 | unsigned SCS_extern_in_linkage_spec : 1; |
340 | |
341 | // type-specifier |
342 | /*TSW*/unsigned TypeSpecWidth : 2; |
343 | /*TSC*/unsigned TypeSpecComplex : 2; |
344 | /*TSS*/unsigned TypeSpecSign : 2; |
345 | /*TST*/unsigned TypeSpecType : 6; |
346 | unsigned TypeAltiVecVector : 1; |
347 | unsigned TypeAltiVecPixel : 1; |
348 | unsigned TypeAltiVecBool : 1; |
349 | unsigned TypeSpecOwned : 1; |
350 | unsigned TypeSpecPipe : 1; |
351 | unsigned TypeSpecSat : 1; |
352 | unsigned ConstrainedAuto : 1; |
353 | |
354 | // type-qualifiers |
355 | unsigned TypeQualifiers : 5; // Bitwise OR of TQ. |
356 | |
357 | // function-specifier |
358 | unsigned FS_inline_specified : 1; |
359 | unsigned FS_forceinline_specified: 1; |
360 | unsigned FS_virtual_specified : 1; |
361 | unsigned FS_noreturn_specified : 1; |
362 | |
363 | // friend-specifier |
364 | unsigned Friend_specified : 1; |
365 | |
366 | // constexpr-specifier |
367 | unsigned ConstexprSpecifier : 2; |
368 | |
369 | union { |
370 | UnionParsedType TypeRep; |
371 | Decl *DeclRep; |
372 | Expr *ExprRep; |
373 | TemplateIdAnnotation *TemplateIdRep; |
374 | }; |
375 | |
376 | /// ExplicitSpecifier - Store information about explicit spicifer. |
377 | ExplicitSpecifier FS_explicit_specifier; |
378 | |
379 | // attributes. |
380 | ParsedAttributes Attrs; |
381 | |
382 | // Scope specifier for the type spec, if applicable. |
383 | CXXScopeSpec TypeScope; |
384 | |
385 | // SourceLocation info. These are null if the item wasn't specified or if |
386 | // the setting was synthesized. |
387 | SourceRange Range; |
388 | |
389 | SourceLocation StorageClassSpecLoc, ThreadStorageClassSpecLoc; |
390 | SourceRange TSWRange; |
391 | SourceLocation TSCLoc, TSSLoc, TSTLoc, AltiVecLoc, TSSatLoc; |
392 | /// TSTNameLoc - If TypeSpecType is any of class, enum, struct, union, |
393 | /// typename, then this is the location of the named type (if present); |
394 | /// otherwise, it is the same as TSTLoc. Hence, the pair TSTLoc and |
395 | /// TSTNameLoc provides source range info for tag types. |
396 | SourceLocation TSTNameLoc; |
397 | SourceRange TypeofParensRange; |
398 | SourceLocation TQ_constLoc, TQ_restrictLoc, TQ_volatileLoc, TQ_atomicLoc, |
399 | TQ_unalignedLoc; |
400 | SourceLocation FS_inlineLoc, FS_virtualLoc, FS_explicitLoc, FS_noreturnLoc; |
401 | SourceLocation FS_explicitCloseParenLoc; |
402 | SourceLocation FS_forceinlineLoc; |
403 | SourceLocation FriendLoc, ModulePrivateLoc, ConstexprLoc; |
404 | SourceLocation TQ_pipeLoc; |
405 | |
406 | WrittenBuiltinSpecs writtenBS; |
407 | void SaveWrittenBuiltinSpecs(); |
408 | |
409 | ObjCDeclSpec *ObjCQualifiers; |
410 | |
411 | static bool isTypeRep(TST T) { |
412 | return (T == TST_typename || T == TST_typeofType || |
413 | T == TST_underlyingType || T == TST_atomic); |
414 | } |
415 | static bool isExprRep(TST T) { |
416 | return (T == TST_typeofExpr || T == TST_decltype); |
417 | } |
418 | static bool isTemplateIdRep(TST T) { |
419 | return (T == TST_auto || T == TST_decltype_auto); |
420 | } |
421 | |
422 | DeclSpec(const DeclSpec &) = delete; |
423 | void operator=(const DeclSpec &) = delete; |
424 | public: |
425 | static bool isDeclRep(TST T) { |
426 | return (T == TST_enum || T == TST_struct || |
427 | T == TST_interface || T == TST_union || |
428 | T == TST_class); |
429 | } |
430 | |
431 | DeclSpec(AttributeFactory &attrFactory) |
432 | : StorageClassSpec(SCS_unspecified), |
433 | ThreadStorageClassSpec(TSCS_unspecified), |
434 | SCS_extern_in_linkage_spec(false), TypeSpecWidth(TSW_unspecified), |
435 | TypeSpecComplex(TSC_unspecified), TypeSpecSign(TSS_unspecified), |
436 | TypeSpecType(TST_unspecified), TypeAltiVecVector(false), |
437 | TypeAltiVecPixel(false), TypeAltiVecBool(false), TypeSpecOwned(false), |
438 | TypeSpecPipe(false), TypeSpecSat(false), ConstrainedAuto(false), |
439 | TypeQualifiers(TQ_unspecified), |
440 | FS_inline_specified(false), FS_forceinline_specified(false), |
441 | FS_virtual_specified(false), FS_noreturn_specified(false), |
442 | Friend_specified(false), ConstexprSpecifier(CSK_unspecified), |
443 | FS_explicit_specifier(), Attrs(attrFactory), writtenBS(), |
444 | ObjCQualifiers(nullptr) {} |
445 | |
446 | // storage-class-specifier |
447 | SCS getStorageClassSpec() const { return (SCS)StorageClassSpec; } |
448 | TSCS getThreadStorageClassSpec() const { |
449 | return (TSCS)ThreadStorageClassSpec; |
450 | } |
451 | bool isExternInLinkageSpec() const { return SCS_extern_in_linkage_spec; } |
452 | void setExternInLinkageSpec(bool Value) { |
453 | SCS_extern_in_linkage_spec = Value; |
454 | } |
455 | |
456 | SourceLocation getStorageClassSpecLoc() const { return StorageClassSpecLoc; } |
457 | SourceLocation getThreadStorageClassSpecLoc() const { |
458 | return ThreadStorageClassSpecLoc; |
459 | } |
460 | |
461 | void ClearStorageClassSpecs() { |
462 | StorageClassSpec = DeclSpec::SCS_unspecified; |
463 | ThreadStorageClassSpec = DeclSpec::TSCS_unspecified; |
464 | SCS_extern_in_linkage_spec = false; |
465 | StorageClassSpecLoc = SourceLocation(); |
466 | ThreadStorageClassSpecLoc = SourceLocation(); |
467 | } |
468 | |
469 | void ClearTypeSpecType() { |
470 | TypeSpecType = DeclSpec::TST_unspecified; |
471 | TypeSpecOwned = false; |
472 | TSTLoc = SourceLocation(); |
473 | } |
474 | |
475 | // type-specifier |
476 | TSW getTypeSpecWidth() const { return (TSW)TypeSpecWidth; } |
477 | TSC getTypeSpecComplex() const { return (TSC)TypeSpecComplex; } |
478 | TSS getTypeSpecSign() const { return (TSS)TypeSpecSign; } |
479 | TST getTypeSpecType() const { return (TST)TypeSpecType; } |
480 | bool isTypeAltiVecVector() const { return TypeAltiVecVector; } |
481 | bool isTypeAltiVecPixel() const { return TypeAltiVecPixel; } |
482 | bool isTypeAltiVecBool() const { return TypeAltiVecBool; } |
483 | bool isTypeSpecOwned() const { return TypeSpecOwned; } |
484 | bool isTypeRep() const { return isTypeRep((TST) TypeSpecType); } |
485 | bool isTypeSpecPipe() const { return TypeSpecPipe; } |
486 | bool isTypeSpecSat() const { return TypeSpecSat; } |
487 | bool isConstrainedAuto() const { return ConstrainedAuto; } |
488 | |
489 | ParsedType getRepAsType() const { |
490 | assert(isTypeRep((TST) TypeSpecType) && "DeclSpec does not store a type")((isTypeRep((TST) TypeSpecType) && "DeclSpec does not store a type" ) ? static_cast<void> (0) : __assert_fail ("isTypeRep((TST) TypeSpecType) && \"DeclSpec does not store a type\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Sema/DeclSpec.h" , 490, __PRETTY_FUNCTION__)); |
491 | return TypeRep; |
492 | } |
493 | Decl *getRepAsDecl() const { |
494 | assert(isDeclRep((TST) TypeSpecType) && "DeclSpec does not store a decl")((isDeclRep((TST) TypeSpecType) && "DeclSpec does not store a decl" ) ? static_cast<void> (0) : __assert_fail ("isDeclRep((TST) TypeSpecType) && \"DeclSpec does not store a decl\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Sema/DeclSpec.h" , 494, __PRETTY_FUNCTION__)); |
495 | return DeclRep; |
496 | } |
497 | Expr *getRepAsExpr() const { |
498 | assert(isExprRep((TST) TypeSpecType) && "DeclSpec does not store an expr")((isExprRep((TST) TypeSpecType) && "DeclSpec does not store an expr" ) ? static_cast<void> (0) : __assert_fail ("isExprRep((TST) TypeSpecType) && \"DeclSpec does not store an expr\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Sema/DeclSpec.h" , 498, __PRETTY_FUNCTION__)); |
499 | return ExprRep; |
500 | } |
501 | TemplateIdAnnotation *getRepAsTemplateId() const { |
502 | assert(isTemplateIdRep((TST) TypeSpecType) &&((isTemplateIdRep((TST) TypeSpecType) && "DeclSpec does not store a template id" ) ? static_cast<void> (0) : __assert_fail ("isTemplateIdRep((TST) TypeSpecType) && \"DeclSpec does not store a template id\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Sema/DeclSpec.h" , 503, __PRETTY_FUNCTION__)) |
503 | "DeclSpec does not store a template id")((isTemplateIdRep((TST) TypeSpecType) && "DeclSpec does not store a template id" ) ? static_cast<void> (0) : __assert_fail ("isTemplateIdRep((TST) TypeSpecType) && \"DeclSpec does not store a template id\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Sema/DeclSpec.h" , 503, __PRETTY_FUNCTION__)); |
504 | return TemplateIdRep; |
505 | } |
506 | CXXScopeSpec &getTypeSpecScope() { return TypeScope; } |
507 | const CXXScopeSpec &getTypeSpecScope() const { return TypeScope; } |
508 | |
509 | SourceRange getSourceRange() const LLVM_READONLY__attribute__((__pure__)) { return Range; } |
510 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return Range.getBegin(); } |
511 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { return Range.getEnd(); } |
512 | |
513 | SourceLocation getTypeSpecWidthLoc() const { return TSWRange.getBegin(); } |
514 | SourceRange getTypeSpecWidthRange() const { return TSWRange; } |
515 | SourceLocation getTypeSpecComplexLoc() const { return TSCLoc; } |
516 | SourceLocation getTypeSpecSignLoc() const { return TSSLoc; } |
517 | SourceLocation getTypeSpecTypeLoc() const { return TSTLoc; } |
518 | SourceLocation getAltiVecLoc() const { return AltiVecLoc; } |
519 | SourceLocation getTypeSpecSatLoc() const { return TSSatLoc; } |
520 | |
521 | SourceLocation getTypeSpecTypeNameLoc() const { |
522 | assert(isDeclRep((TST) TypeSpecType) || TypeSpecType == TST_typename)((isDeclRep((TST) TypeSpecType) || TypeSpecType == TST_typename ) ? static_cast<void> (0) : __assert_fail ("isDeclRep((TST) TypeSpecType) || TypeSpecType == TST_typename" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Sema/DeclSpec.h" , 522, __PRETTY_FUNCTION__)); |
523 | return TSTNameLoc; |
524 | } |
525 | |
526 | SourceRange getTypeofParensRange() const { return TypeofParensRange; } |
527 | void setTypeofParensRange(SourceRange range) { TypeofParensRange = range; } |
528 | |
529 | bool hasAutoTypeSpec() const { |
530 | return (TypeSpecType == TST_auto || TypeSpecType == TST_auto_type || |
531 | TypeSpecType == TST_decltype_auto); |
532 | } |
533 | |
534 | bool hasTagDefinition() const; |
535 | |
536 | /// Turn a type-specifier-type into a string like "_Bool" or "union". |
537 | static const char *getSpecifierName(DeclSpec::TST T, |
538 | const PrintingPolicy &Policy); |
539 | static const char *getSpecifierName(DeclSpec::TQ Q); |
540 | static const char *getSpecifierName(DeclSpec::TSS S); |
541 | static const char *getSpecifierName(DeclSpec::TSC C); |
542 | static const char *getSpecifierName(DeclSpec::TSW W); |
543 | static const char *getSpecifierName(DeclSpec::SCS S); |
544 | static const char *getSpecifierName(DeclSpec::TSCS S); |
545 | static const char *getSpecifierName(ConstexprSpecKind C); |
546 | |
547 | // type-qualifiers |
548 | |
549 | /// getTypeQualifiers - Return a set of TQs. |
550 | unsigned getTypeQualifiers() const { return TypeQualifiers; } |
551 | SourceLocation getConstSpecLoc() const { return TQ_constLoc; } |
552 | SourceLocation getRestrictSpecLoc() const { return TQ_restrictLoc; } |
553 | SourceLocation getVolatileSpecLoc() const { return TQ_volatileLoc; } |
554 | SourceLocation getAtomicSpecLoc() const { return TQ_atomicLoc; } |
555 | SourceLocation getUnalignedSpecLoc() const { return TQ_unalignedLoc; } |
556 | SourceLocation getPipeLoc() const { return TQ_pipeLoc; } |
557 | |
558 | /// Clear out all of the type qualifiers. |
559 | void ClearTypeQualifiers() { |
560 | TypeQualifiers = 0; |
561 | TQ_constLoc = SourceLocation(); |
562 | TQ_restrictLoc = SourceLocation(); |
563 | TQ_volatileLoc = SourceLocation(); |
564 | TQ_atomicLoc = SourceLocation(); |
565 | TQ_unalignedLoc = SourceLocation(); |
566 | TQ_pipeLoc = SourceLocation(); |
567 | } |
568 | |
569 | // function-specifier |
570 | bool isInlineSpecified() const { |
571 | return FS_inline_specified | FS_forceinline_specified; |
572 | } |
573 | SourceLocation getInlineSpecLoc() const { |
574 | return FS_inline_specified ? FS_inlineLoc : FS_forceinlineLoc; |
575 | } |
576 | |
577 | ExplicitSpecifier getExplicitSpecifier() const { |
578 | return FS_explicit_specifier; |
579 | } |
580 | |
581 | bool isVirtualSpecified() const { return FS_virtual_specified; } |
582 | SourceLocation getVirtualSpecLoc() const { return FS_virtualLoc; } |
583 | |
584 | bool hasExplicitSpecifier() const { |
585 | return FS_explicit_specifier.isSpecified(); |
586 | } |
587 | SourceLocation getExplicitSpecLoc() const { return FS_explicitLoc; } |
588 | SourceRange getExplicitSpecRange() const { |
589 | return FS_explicit_specifier.getExpr() |
590 | ? SourceRange(FS_explicitLoc, FS_explicitCloseParenLoc) |
591 | : SourceRange(FS_explicitLoc); |
592 | } |
593 | |
594 | bool isNoreturnSpecified() const { return FS_noreturn_specified; } |
595 | SourceLocation getNoreturnSpecLoc() const { return FS_noreturnLoc; } |
596 | |
597 | void ClearFunctionSpecs() { |
598 | FS_inline_specified = false; |
599 | FS_inlineLoc = SourceLocation(); |
600 | FS_forceinline_specified = false; |
601 | FS_forceinlineLoc = SourceLocation(); |
602 | FS_virtual_specified = false; |
603 | FS_virtualLoc = SourceLocation(); |
604 | FS_explicit_specifier = ExplicitSpecifier(); |
605 | FS_explicitLoc = SourceLocation(); |
606 | FS_explicitCloseParenLoc = SourceLocation(); |
607 | FS_noreturn_specified = false; |
608 | FS_noreturnLoc = SourceLocation(); |
609 | } |
610 | |
611 | /// This method calls the passed in handler on each CVRU qual being |
612 | /// set. |
613 | /// Handle - a handler to be invoked. |
614 | void forEachCVRUQualifier( |
615 | llvm::function_ref<void(TQ, StringRef, SourceLocation)> Handle); |
616 | |
617 | /// This method calls the passed in handler on each qual being |
618 | /// set. |
619 | /// Handle - a handler to be invoked. |
620 | void forEachQualifier( |
621 | llvm::function_ref<void(TQ, StringRef, SourceLocation)> Handle); |
622 | |
623 | /// Return true if any type-specifier has been found. |
624 | bool hasTypeSpecifier() const { |
625 | return getTypeSpecType() != DeclSpec::TST_unspecified || |
626 | getTypeSpecWidth() != DeclSpec::TSW_unspecified || |
627 | getTypeSpecComplex() != DeclSpec::TSC_unspecified || |
628 | getTypeSpecSign() != DeclSpec::TSS_unspecified; |
629 | } |
630 | |
631 | /// Return a bitmask of which flavors of specifiers this |
632 | /// DeclSpec includes. |
633 | unsigned getParsedSpecifiers() const; |
634 | |
635 | /// isEmpty - Return true if this declaration specifier is completely empty: |
636 | /// no tokens were parsed in the production of it. |
637 | bool isEmpty() const { |
638 | return getParsedSpecifiers() == DeclSpec::PQ_None; |
639 | } |
640 | |
641 | void SetRangeStart(SourceLocation Loc) { Range.setBegin(Loc); } |
642 | void SetRangeEnd(SourceLocation Loc) { Range.setEnd(Loc); } |
643 | |
644 | /// These methods set the specified attribute of the DeclSpec and |
645 | /// return false if there was no error. If an error occurs (for |
646 | /// example, if we tried to set "auto" on a spec with "extern" |
647 | /// already set), they return true and set PrevSpec and DiagID |
648 | /// such that |
649 | /// Diag(Loc, DiagID) << PrevSpec; |
650 | /// will yield a useful result. |
651 | /// |
652 | /// TODO: use a more general approach that still allows these |
653 | /// diagnostics to be ignored when desired. |
654 | bool SetStorageClassSpec(Sema &S, SCS SC, SourceLocation Loc, |
655 | const char *&PrevSpec, unsigned &DiagID, |
656 | const PrintingPolicy &Policy); |
657 | bool SetStorageClassSpecThread(TSCS TSC, SourceLocation Loc, |
658 | const char *&PrevSpec, unsigned &DiagID); |
659 | bool SetTypeSpecWidth(TSW W, SourceLocation Loc, const char *&PrevSpec, |
660 | unsigned &DiagID, const PrintingPolicy &Policy); |
661 | bool SetTypeSpecComplex(TSC C, SourceLocation Loc, const char *&PrevSpec, |
662 | unsigned &DiagID); |
663 | bool SetTypeSpecSign(TSS S, SourceLocation Loc, const char *&PrevSpec, |
664 | unsigned &DiagID); |
665 | bool SetTypeSpecType(TST T, SourceLocation Loc, const char *&PrevSpec, |
666 | unsigned &DiagID, const PrintingPolicy &Policy); |
667 | bool SetTypeSpecType(TST T, SourceLocation Loc, const char *&PrevSpec, |
668 | unsigned &DiagID, ParsedType Rep, |
669 | const PrintingPolicy &Policy); |
670 | bool SetTypeSpecType(TST T, SourceLocation Loc, const char *&PrevSpec, |
671 | unsigned &DiagID, Decl *Rep, bool Owned, |
672 | const PrintingPolicy &Policy); |
673 | bool SetTypeSpecType(TST T, SourceLocation TagKwLoc, |
674 | SourceLocation TagNameLoc, const char *&PrevSpec, |
675 | unsigned &DiagID, ParsedType Rep, |
676 | const PrintingPolicy &Policy); |
677 | bool SetTypeSpecType(TST T, SourceLocation TagKwLoc, |
678 | SourceLocation TagNameLoc, const char *&PrevSpec, |
679 | unsigned &DiagID, Decl *Rep, bool Owned, |
680 | const PrintingPolicy &Policy); |
681 | bool SetTypeSpecType(TST T, SourceLocation Loc, const char *&PrevSpec, |
682 | unsigned &DiagID, TemplateIdAnnotation *Rep, |
683 | const PrintingPolicy &Policy); |
684 | |
685 | bool SetTypeSpecType(TST T, SourceLocation Loc, const char *&PrevSpec, |
686 | unsigned &DiagID, Expr *Rep, |
687 | const PrintingPolicy &policy); |
688 | bool SetTypeAltiVecVector(bool isAltiVecVector, SourceLocation Loc, |
689 | const char *&PrevSpec, unsigned &DiagID, |
690 | const PrintingPolicy &Policy); |
691 | bool SetTypeAltiVecPixel(bool isAltiVecPixel, SourceLocation Loc, |
692 | const char *&PrevSpec, unsigned &DiagID, |
693 | const PrintingPolicy &Policy); |
694 | bool SetTypeAltiVecBool(bool isAltiVecBool, SourceLocation Loc, |
695 | const char *&PrevSpec, unsigned &DiagID, |
696 | const PrintingPolicy &Policy); |
697 | bool SetTypePipe(bool isPipe, SourceLocation Loc, |
698 | const char *&PrevSpec, unsigned &DiagID, |
699 | const PrintingPolicy &Policy); |
700 | bool SetTypeSpecSat(SourceLocation Loc, const char *&PrevSpec, |
701 | unsigned &DiagID); |
702 | bool SetTypeSpecError(); |
703 | void UpdateDeclRep(Decl *Rep) { |
704 | assert(isDeclRep((TST) TypeSpecType))((isDeclRep((TST) TypeSpecType)) ? static_cast<void> (0 ) : __assert_fail ("isDeclRep((TST) TypeSpecType)", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Sema/DeclSpec.h" , 704, __PRETTY_FUNCTION__)); |
705 | DeclRep = Rep; |
706 | } |
707 | void UpdateTypeRep(ParsedType Rep) { |
708 | assert(isTypeRep((TST) TypeSpecType))((isTypeRep((TST) TypeSpecType)) ? static_cast<void> (0 ) : __assert_fail ("isTypeRep((TST) TypeSpecType)", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Sema/DeclSpec.h" , 708, __PRETTY_FUNCTION__)); |
709 | TypeRep = Rep; |
710 | } |
711 | void UpdateExprRep(Expr *Rep) { |
712 | assert(isExprRep((TST) TypeSpecType))((isExprRep((TST) TypeSpecType)) ? static_cast<void> (0 ) : __assert_fail ("isExprRep((TST) TypeSpecType)", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Sema/DeclSpec.h" , 712, __PRETTY_FUNCTION__)); |
713 | ExprRep = Rep; |
714 | } |
715 | |
716 | bool SetTypeQual(TQ T, SourceLocation Loc); |
717 | |
718 | bool SetTypeQual(TQ T, SourceLocation Loc, const char *&PrevSpec, |
719 | unsigned &DiagID, const LangOptions &Lang); |
720 | |
721 | bool setFunctionSpecInline(SourceLocation Loc, const char *&PrevSpec, |
722 | unsigned &DiagID); |
723 | bool setFunctionSpecForceInline(SourceLocation Loc, const char *&PrevSpec, |
724 | unsigned &DiagID); |
725 | bool setFunctionSpecVirtual(SourceLocation Loc, const char *&PrevSpec, |
726 | unsigned &DiagID); |
727 | bool setFunctionSpecExplicit(SourceLocation Loc, const char *&PrevSpec, |
728 | unsigned &DiagID, ExplicitSpecifier ExplicitSpec, |
729 | SourceLocation CloseParenLoc); |
730 | bool setFunctionSpecNoreturn(SourceLocation Loc, const char *&PrevSpec, |
731 | unsigned &DiagID); |
732 | |
733 | bool SetFriendSpec(SourceLocation Loc, const char *&PrevSpec, |
734 | unsigned &DiagID); |
735 | bool setModulePrivateSpec(SourceLocation Loc, const char *&PrevSpec, |
736 | unsigned &DiagID); |
737 | bool SetConstexprSpec(ConstexprSpecKind ConstexprKind, SourceLocation Loc, |
738 | const char *&PrevSpec, unsigned &DiagID); |
739 | |
740 | bool isFriendSpecified() const { return Friend_specified; } |
741 | SourceLocation getFriendSpecLoc() const { return FriendLoc; } |
742 | |
743 | bool isModulePrivateSpecified() const { return ModulePrivateLoc.isValid(); } |
744 | SourceLocation getModulePrivateSpecLoc() const { return ModulePrivateLoc; } |
745 | |
746 | ConstexprSpecKind getConstexprSpecifier() const { |
747 | return ConstexprSpecKind(ConstexprSpecifier); |
748 | } |
749 | |
750 | SourceLocation getConstexprSpecLoc() const { return ConstexprLoc; } |
751 | bool hasConstexprSpecifier() const { |
752 | return ConstexprSpecifier != CSK_unspecified; |
753 | } |
754 | |
755 | void ClearConstexprSpec() { |
756 | ConstexprSpecifier = CSK_unspecified; |
757 | ConstexprLoc = SourceLocation(); |
758 | } |
759 | |
760 | AttributePool &getAttributePool() const { |
761 | return Attrs.getPool(); |
762 | } |
763 | |
764 | /// Concatenates two attribute lists. |
765 | /// |
766 | /// The GCC attribute syntax allows for the following: |
767 | /// |
768 | /// \code |
769 | /// short __attribute__(( unused, deprecated )) |
770 | /// int __attribute__(( may_alias, aligned(16) )) var; |
771 | /// \endcode |
772 | /// |
773 | /// This declares 4 attributes using 2 lists. The following syntax is |
774 | /// also allowed and equivalent to the previous declaration. |
775 | /// |
776 | /// \code |
777 | /// short __attribute__((unused)) __attribute__((deprecated)) |
778 | /// int __attribute__((may_alias)) __attribute__((aligned(16))) var; |
779 | /// \endcode |
780 | /// |
781 | void addAttributes(ParsedAttributesView &AL) { |
782 | Attrs.addAll(AL.begin(), AL.end()); |
783 | } |
784 | |
785 | bool hasAttributes() const { return !Attrs.empty(); } |
786 | |
787 | ParsedAttributes &getAttributes() { return Attrs; } |
788 | const ParsedAttributes &getAttributes() const { return Attrs; } |
789 | |
790 | void takeAttributesFrom(ParsedAttributes &attrs) { |
791 | Attrs.takeAllFrom(attrs); |
792 | } |
793 | |
794 | /// Finish - This does final analysis of the declspec, issuing diagnostics for |
795 | /// things like "_Imaginary" (lacking an FP type). After calling this method, |
796 | /// DeclSpec is guaranteed self-consistent, even if an error occurred. |
797 | void Finish(Sema &S, const PrintingPolicy &Policy); |
798 | |
799 | const WrittenBuiltinSpecs& getWrittenBuiltinSpecs() const { |
800 | return writtenBS; |
801 | } |
802 | |
803 | ObjCDeclSpec *getObjCQualifiers() const { return ObjCQualifiers; } |
804 | void setObjCQualifiers(ObjCDeclSpec *quals) { ObjCQualifiers = quals; } |
805 | |
806 | /// Checks if this DeclSpec can stand alone, without a Declarator. |
807 | /// |
808 | /// Only tag declspecs can stand alone. |
809 | bool isMissingDeclaratorOk(); |
810 | }; |
811 | |
812 | /// Captures information about "declaration specifiers" specific to |
813 | /// Objective-C. |
814 | class ObjCDeclSpec { |
815 | public: |
816 | /// ObjCDeclQualifier - Qualifier used on types in method |
817 | /// declarations. Not all combinations are sensible. Parameters |
818 | /// can be one of { in, out, inout } with one of { bycopy, byref }. |
819 | /// Returns can either be { oneway } or not. |
820 | /// |
821 | /// This should be kept in sync with Decl::ObjCDeclQualifier. |
822 | enum ObjCDeclQualifier { |
823 | DQ_None = 0x0, |
824 | DQ_In = 0x1, |
825 | DQ_Inout = 0x2, |
826 | DQ_Out = 0x4, |
827 | DQ_Bycopy = 0x8, |
828 | DQ_Byref = 0x10, |
829 | DQ_Oneway = 0x20, |
830 | DQ_CSNullability = 0x40 |
831 | }; |
832 | |
833 | /// PropertyAttributeKind - list of property attributes. |
834 | /// Keep this list in sync with LLVM's Dwarf.h ApplePropertyAttributes. |
835 | enum ObjCPropertyAttributeKind { |
836 | DQ_PR_noattr = 0x0, |
837 | DQ_PR_readonly = 0x01, |
838 | DQ_PR_getter = 0x02, |
839 | DQ_PR_assign = 0x04, |
840 | DQ_PR_readwrite = 0x08, |
841 | DQ_PR_retain = 0x10, |
842 | DQ_PR_copy = 0x20, |
843 | DQ_PR_nonatomic = 0x40, |
844 | DQ_PR_setter = 0x80, |
845 | DQ_PR_atomic = 0x100, |
846 | DQ_PR_weak = 0x200, |
847 | DQ_PR_strong = 0x400, |
848 | DQ_PR_unsafe_unretained = 0x800, |
849 | DQ_PR_nullability = 0x1000, |
850 | DQ_PR_null_resettable = 0x2000, |
851 | DQ_PR_class = 0x4000, |
852 | DQ_PR_direct = 0x8000, |
853 | }; |
854 | |
855 | ObjCDeclSpec() |
856 | : objcDeclQualifier(DQ_None), PropertyAttributes(DQ_PR_noattr), |
857 | Nullability(0), GetterName(nullptr), SetterName(nullptr) { } |
858 | |
859 | ObjCDeclQualifier getObjCDeclQualifier() const { |
860 | return (ObjCDeclQualifier)objcDeclQualifier; |
861 | } |
862 | void setObjCDeclQualifier(ObjCDeclQualifier DQVal) { |
863 | objcDeclQualifier = (ObjCDeclQualifier) (objcDeclQualifier | DQVal); |
864 | } |
865 | void clearObjCDeclQualifier(ObjCDeclQualifier DQVal) { |
866 | objcDeclQualifier = (ObjCDeclQualifier) (objcDeclQualifier & ~DQVal); |
867 | } |
868 | |
869 | ObjCPropertyAttributeKind getPropertyAttributes() const { |
870 | return ObjCPropertyAttributeKind(PropertyAttributes); |
871 | } |
872 | void setPropertyAttributes(ObjCPropertyAttributeKind PRVal) { |
873 | PropertyAttributes = |
874 | (ObjCPropertyAttributeKind)(PropertyAttributes | PRVal); |
875 | } |
876 | |
877 | NullabilityKind getNullability() const { |
878 | assert(((getObjCDeclQualifier() & DQ_CSNullability) ||((((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes () & DQ_PR_nullability)) && "Objective-C declspec doesn't have nullability" ) ? static_cast<void> (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & DQ_PR_nullability)) && \"Objective-C declspec doesn't have nullability\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Sema/DeclSpec.h" , 880, __PRETTY_FUNCTION__)) |
879 | (getPropertyAttributes() & DQ_PR_nullability)) &&((((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes () & DQ_PR_nullability)) && "Objective-C declspec doesn't have nullability" ) ? static_cast<void> (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & DQ_PR_nullability)) && \"Objective-C declspec doesn't have nullability\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Sema/DeclSpec.h" , 880, __PRETTY_FUNCTION__)) |
880 | "Objective-C declspec doesn't have nullability")((((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes () & DQ_PR_nullability)) && "Objective-C declspec doesn't have nullability" ) ? static_cast<void> (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & DQ_PR_nullability)) && \"Objective-C declspec doesn't have nullability\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Sema/DeclSpec.h" , 880, __PRETTY_FUNCTION__)); |
881 | return static_cast<NullabilityKind>(Nullability); |
882 | } |
883 | |
884 | SourceLocation getNullabilityLoc() const { |
885 | assert(((getObjCDeclQualifier() & DQ_CSNullability) ||((((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes () & DQ_PR_nullability)) && "Objective-C declspec doesn't have nullability" ) ? static_cast<void> (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & DQ_PR_nullability)) && \"Objective-C declspec doesn't have nullability\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Sema/DeclSpec.h" , 887, __PRETTY_FUNCTION__)) |
886 | (getPropertyAttributes() & DQ_PR_nullability)) &&((((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes () & DQ_PR_nullability)) && "Objective-C declspec doesn't have nullability" ) ? static_cast<void> (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & DQ_PR_nullability)) && \"Objective-C declspec doesn't have nullability\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Sema/DeclSpec.h" , 887, __PRETTY_FUNCTION__)) |
887 | "Objective-C declspec doesn't have nullability")((((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes () & DQ_PR_nullability)) && "Objective-C declspec doesn't have nullability" ) ? static_cast<void> (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & DQ_PR_nullability)) && \"Objective-C declspec doesn't have nullability\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Sema/DeclSpec.h" , 887, __PRETTY_FUNCTION__)); |
888 | return NullabilityLoc; |
889 | } |
890 | |
891 | void setNullability(SourceLocation loc, NullabilityKind kind) { |
892 | assert(((getObjCDeclQualifier() & DQ_CSNullability) ||((((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes () & DQ_PR_nullability)) && "Set the nullability declspec or property attribute first" ) ? static_cast<void> (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & DQ_PR_nullability)) && \"Set the nullability declspec or property attribute first\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Sema/DeclSpec.h" , 894, __PRETTY_FUNCTION__)) |
893 | (getPropertyAttributes() & DQ_PR_nullability)) &&((((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes () & DQ_PR_nullability)) && "Set the nullability declspec or property attribute first" ) ? static_cast<void> (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & DQ_PR_nullability)) && \"Set the nullability declspec or property attribute first\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Sema/DeclSpec.h" , 894, __PRETTY_FUNCTION__)) |
894 | "Set the nullability declspec or property attribute first")((((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes () & DQ_PR_nullability)) && "Set the nullability declspec or property attribute first" ) ? static_cast<void> (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & DQ_PR_nullability)) && \"Set the nullability declspec or property attribute first\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Sema/DeclSpec.h" , 894, __PRETTY_FUNCTION__)); |
895 | Nullability = static_cast<unsigned>(kind); |
896 | NullabilityLoc = loc; |
897 | } |
898 | |
899 | const IdentifierInfo *getGetterName() const { return GetterName; } |
900 | IdentifierInfo *getGetterName() { return GetterName; } |
901 | SourceLocation getGetterNameLoc() const { return GetterNameLoc; } |
902 | void setGetterName(IdentifierInfo *name, SourceLocation loc) { |
903 | GetterName = name; |
904 | GetterNameLoc = loc; |
905 | } |
906 | |
907 | const IdentifierInfo *getSetterName() const { return SetterName; } |
908 | IdentifierInfo *getSetterName() { return SetterName; } |
909 | SourceLocation getSetterNameLoc() const { return SetterNameLoc; } |
910 | void setSetterName(IdentifierInfo *name, SourceLocation loc) { |
911 | SetterName = name; |
912 | SetterNameLoc = loc; |
913 | } |
914 | |
915 | private: |
916 | // FIXME: These two are unrelated and mutually exclusive. So perhaps |
917 | // we can put them in a union to reflect their mutual exclusivity |
918 | // (space saving is negligible). |
919 | unsigned objcDeclQualifier : 7; |
920 | |
921 | // NOTE: VC++ treats enums as signed, avoid using ObjCPropertyAttributeKind |
922 | unsigned PropertyAttributes : 16; |
923 | |
924 | unsigned Nullability : 2; |
925 | |
926 | SourceLocation NullabilityLoc; |
927 | |
928 | IdentifierInfo *GetterName; // getter name or NULL if no getter |
929 | IdentifierInfo *SetterName; // setter name or NULL if no setter |
930 | SourceLocation GetterNameLoc; // location of the getter attribute's value |
931 | SourceLocation SetterNameLoc; // location of the setter attribute's value |
932 | |
933 | }; |
934 | |
935 | /// Describes the kind of unqualified-id parsed. |
936 | enum class UnqualifiedIdKind { |
937 | /// An identifier. |
938 | IK_Identifier, |
939 | /// An overloaded operator name, e.g., operator+. |
940 | IK_OperatorFunctionId, |
941 | /// A conversion function name, e.g., operator int. |
942 | IK_ConversionFunctionId, |
943 | /// A user-defined literal name, e.g., operator "" _i. |
944 | IK_LiteralOperatorId, |
945 | /// A constructor name. |
946 | IK_ConstructorName, |
947 | /// A constructor named via a template-id. |
948 | IK_ConstructorTemplateId, |
949 | /// A destructor name. |
950 | IK_DestructorName, |
951 | /// A template-id, e.g., f<int>. |
952 | IK_TemplateId, |
953 | /// An implicit 'self' parameter |
954 | IK_ImplicitSelfParam, |
955 | /// A deduction-guide name (a template-name) |
956 | IK_DeductionGuideName |
957 | }; |
958 | |
959 | /// Represents a C++ unqualified-id that has been parsed. |
960 | class UnqualifiedId { |
961 | private: |
962 | UnqualifiedId(const UnqualifiedId &Other) = delete; |
963 | const UnqualifiedId &operator=(const UnqualifiedId &) = delete; |
964 | |
965 | public: |
966 | /// Describes the kind of unqualified-id parsed. |
967 | UnqualifiedIdKind Kind; |
968 | |
969 | struct OFI { |
970 | /// The kind of overloaded operator. |
971 | OverloadedOperatorKind Operator; |
972 | |
973 | /// The source locations of the individual tokens that name |
974 | /// the operator, e.g., the "new", "[", and "]" tokens in |
975 | /// operator new []. |
976 | /// |
977 | /// Different operators have different numbers of tokens in their name, |
978 | /// up to three. Any remaining source locations in this array will be |
979 | /// set to an invalid value for operators with fewer than three tokens. |
980 | unsigned SymbolLocations[3]; |
981 | }; |
982 | |
983 | /// Anonymous union that holds extra data associated with the |
984 | /// parsed unqualified-id. |
985 | union { |
986 | /// When Kind == IK_Identifier, the parsed identifier, or when |
987 | /// Kind == IK_UserLiteralId, the identifier suffix. |
988 | IdentifierInfo *Identifier; |
989 | |
990 | /// When Kind == IK_OperatorFunctionId, the overloaded operator |
991 | /// that we parsed. |
992 | struct OFI OperatorFunctionId; |
993 | |
994 | /// When Kind == IK_ConversionFunctionId, the type that the |
995 | /// conversion function names. |
996 | UnionParsedType ConversionFunctionId; |
997 | |
998 | /// When Kind == IK_ConstructorName, the class-name of the type |
999 | /// whose constructor is being referenced. |
1000 | UnionParsedType ConstructorName; |
1001 | |
1002 | /// When Kind == IK_DestructorName, the type referred to by the |
1003 | /// class-name. |
1004 | UnionParsedType DestructorName; |
1005 | |
1006 | /// When Kind == IK_DeductionGuideName, the parsed template-name. |
1007 | UnionParsedTemplateTy TemplateName; |
1008 | |
1009 | /// When Kind == IK_TemplateId or IK_ConstructorTemplateId, |
1010 | /// the template-id annotation that contains the template name and |
1011 | /// template arguments. |
1012 | TemplateIdAnnotation *TemplateId; |
1013 | }; |
1014 | |
1015 | /// The location of the first token that describes this unqualified-id, |
1016 | /// which will be the location of the identifier, "operator" keyword, |
1017 | /// tilde (for a destructor), or the template name of a template-id. |
1018 | SourceLocation StartLocation; |
1019 | |
1020 | /// The location of the last token that describes this unqualified-id. |
1021 | SourceLocation EndLocation; |
1022 | |
1023 | UnqualifiedId() |
1024 | : Kind(UnqualifiedIdKind::IK_Identifier), Identifier(nullptr) {} |
1025 | |
1026 | /// Clear out this unqualified-id, setting it to default (invalid) |
1027 | /// state. |
1028 | void clear() { |
1029 | Kind = UnqualifiedIdKind::IK_Identifier; |
1030 | Identifier = nullptr; |
1031 | StartLocation = SourceLocation(); |
1032 | EndLocation = SourceLocation(); |
1033 | } |
1034 | |
1035 | /// Determine whether this unqualified-id refers to a valid name. |
1036 | bool isValid() const { return StartLocation.isValid(); } |
1037 | |
1038 | /// Determine whether this unqualified-id refers to an invalid name. |
1039 | bool isInvalid() const { return !isValid(); } |
1040 | |
1041 | /// Determine what kind of name we have. |
1042 | UnqualifiedIdKind getKind() const { return Kind; } |
1043 | void setKind(UnqualifiedIdKind kind) { Kind = kind; } |
1044 | |
1045 | /// Specify that this unqualified-id was parsed as an identifier. |
1046 | /// |
1047 | /// \param Id the parsed identifier. |
1048 | /// \param IdLoc the location of the parsed identifier. |
1049 | void setIdentifier(const IdentifierInfo *Id, SourceLocation IdLoc) { |
1050 | Kind = UnqualifiedIdKind::IK_Identifier; |
1051 | Identifier = const_cast<IdentifierInfo *>(Id); |
1052 | StartLocation = EndLocation = IdLoc; |
1053 | } |
1054 | |
1055 | /// Specify that this unqualified-id was parsed as an |
1056 | /// operator-function-id. |
1057 | /// |
1058 | /// \param OperatorLoc the location of the 'operator' keyword. |
1059 | /// |
1060 | /// \param Op the overloaded operator. |
1061 | /// |
1062 | /// \param SymbolLocations the locations of the individual operator symbols |
1063 | /// in the operator. |
1064 | void setOperatorFunctionId(SourceLocation OperatorLoc, |
1065 | OverloadedOperatorKind Op, |
1066 | SourceLocation SymbolLocations[3]); |
1067 | |
1068 | /// Specify that this unqualified-id was parsed as a |
1069 | /// conversion-function-id. |
1070 | /// |
1071 | /// \param OperatorLoc the location of the 'operator' keyword. |
1072 | /// |
1073 | /// \param Ty the type to which this conversion function is converting. |
1074 | /// |
1075 | /// \param EndLoc the location of the last token that makes up the type name. |
1076 | void setConversionFunctionId(SourceLocation OperatorLoc, |
1077 | ParsedType Ty, |
1078 | SourceLocation EndLoc) { |
1079 | Kind = UnqualifiedIdKind::IK_ConversionFunctionId; |
1080 | StartLocation = OperatorLoc; |
1081 | EndLocation = EndLoc; |
1082 | ConversionFunctionId = Ty; |
1083 | } |
1084 | |
1085 | /// Specific that this unqualified-id was parsed as a |
1086 | /// literal-operator-id. |
1087 | /// |
1088 | /// \param Id the parsed identifier. |
1089 | /// |
1090 | /// \param OpLoc the location of the 'operator' keyword. |
1091 | /// |
1092 | /// \param IdLoc the location of the identifier. |
1093 | void setLiteralOperatorId(const IdentifierInfo *Id, SourceLocation OpLoc, |
1094 | SourceLocation IdLoc) { |
1095 | Kind = UnqualifiedIdKind::IK_LiteralOperatorId; |
1096 | Identifier = const_cast<IdentifierInfo *>(Id); |
1097 | StartLocation = OpLoc; |
1098 | EndLocation = IdLoc; |
1099 | } |
1100 | |
1101 | /// Specify that this unqualified-id was parsed as a constructor name. |
1102 | /// |
1103 | /// \param ClassType the class type referred to by the constructor name. |
1104 | /// |
1105 | /// \param ClassNameLoc the location of the class name. |
1106 | /// |
1107 | /// \param EndLoc the location of the last token that makes up the type name. |
1108 | void setConstructorName(ParsedType ClassType, |
1109 | SourceLocation ClassNameLoc, |
1110 | SourceLocation EndLoc) { |
1111 | Kind = UnqualifiedIdKind::IK_ConstructorName; |
1112 | StartLocation = ClassNameLoc; |
1113 | EndLocation = EndLoc; |
1114 | ConstructorName = ClassType; |
1115 | } |
1116 | |
1117 | /// Specify that this unqualified-id was parsed as a |
1118 | /// template-id that names a constructor. |
1119 | /// |
1120 | /// \param TemplateId the template-id annotation that describes the parsed |
1121 | /// template-id. This UnqualifiedId instance will take ownership of the |
1122 | /// \p TemplateId and will free it on destruction. |
1123 | void setConstructorTemplateId(TemplateIdAnnotation *TemplateId); |
1124 | |
1125 | /// Specify that this unqualified-id was parsed as a destructor name. |
1126 | /// |
1127 | /// \param TildeLoc the location of the '~' that introduces the destructor |
1128 | /// name. |
1129 | /// |
1130 | /// \param ClassType the name of the class referred to by the destructor name. |
1131 | void setDestructorName(SourceLocation TildeLoc, |
1132 | ParsedType ClassType, |
1133 | SourceLocation EndLoc) { |
1134 | Kind = UnqualifiedIdKind::IK_DestructorName; |
1135 | StartLocation = TildeLoc; |
1136 | EndLocation = EndLoc; |
1137 | DestructorName = ClassType; |
1138 | } |
1139 | |
1140 | /// Specify that this unqualified-id was parsed as a template-id. |
1141 | /// |
1142 | /// \param TemplateId the template-id annotation that describes the parsed |
1143 | /// template-id. This UnqualifiedId instance will take ownership of the |
1144 | /// \p TemplateId and will free it on destruction. |
1145 | void setTemplateId(TemplateIdAnnotation *TemplateId); |
1146 | |
1147 | /// Specify that this unqualified-id was parsed as a template-name for |
1148 | /// a deduction-guide. |
1149 | /// |
1150 | /// \param Template The parsed template-name. |
1151 | /// \param TemplateLoc The location of the parsed template-name. |
1152 | void setDeductionGuideName(ParsedTemplateTy Template, |
1153 | SourceLocation TemplateLoc) { |
1154 | Kind = UnqualifiedIdKind::IK_DeductionGuideName; |
1155 | TemplateName = Template; |
1156 | StartLocation = EndLocation = TemplateLoc; |
1157 | } |
1158 | |
1159 | /// Return the source range that covers this unqualified-id. |
1160 | SourceRange getSourceRange() const LLVM_READONLY__attribute__((__pure__)) { |
1161 | return SourceRange(StartLocation, EndLocation); |
1162 | } |
1163 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return StartLocation; } |
1164 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { return EndLocation; } |
1165 | }; |
1166 | |
1167 | /// A set of tokens that has been cached for later parsing. |
1168 | typedef SmallVector<Token, 4> CachedTokens; |
1169 | |
1170 | /// One instance of this struct is used for each type in a |
1171 | /// declarator that is parsed. |
1172 | /// |
1173 | /// This is intended to be a small value object. |
1174 | struct DeclaratorChunk { |
1175 | enum { |
1176 | Pointer, Reference, Array, Function, BlockPointer, MemberPointer, Paren, Pipe |
1177 | } Kind; |
1178 | |
1179 | /// Loc - The place where this type was defined. |
1180 | SourceLocation Loc; |
1181 | /// EndLoc - If valid, the place where this chunck ends. |
1182 | SourceLocation EndLoc; |
1183 | |
1184 | SourceRange getSourceRange() const { |
1185 | if (EndLoc.isInvalid()) |
1186 | return SourceRange(Loc, Loc); |
1187 | return SourceRange(Loc, EndLoc); |
1188 | } |
1189 | |
1190 | ParsedAttributesView AttrList; |
1191 | |
1192 | struct PointerTypeInfo { |
1193 | /// The type qualifiers: const/volatile/restrict/unaligned/atomic. |
1194 | unsigned TypeQuals : 5; |
1195 | |
1196 | /// The location of the const-qualifier, if any. |
1197 | unsigned ConstQualLoc; |
1198 | |
1199 | /// The location of the volatile-qualifier, if any. |
1200 | unsigned VolatileQualLoc; |
1201 | |
1202 | /// The location of the restrict-qualifier, if any. |
1203 | unsigned RestrictQualLoc; |
1204 | |
1205 | /// The location of the _Atomic-qualifier, if any. |
1206 | unsigned AtomicQualLoc; |
1207 | |
1208 | /// The location of the __unaligned-qualifier, if any. |
1209 | unsigned UnalignedQualLoc; |
1210 | |
1211 | void destroy() { |
1212 | } |
1213 | }; |
1214 | |
1215 | struct ReferenceTypeInfo { |
1216 | /// The type qualifier: restrict. [GNU] C++ extension |
1217 | bool HasRestrict : 1; |
1218 | /// True if this is an lvalue reference, false if it's an rvalue reference. |
1219 | bool LValueRef : 1; |
1220 | void destroy() { |
1221 | } |
1222 | }; |
1223 | |
1224 | struct ArrayTypeInfo { |
1225 | /// The type qualifiers for the array: |
1226 | /// const/volatile/restrict/__unaligned/_Atomic. |
1227 | unsigned TypeQuals : 5; |
1228 | |
1229 | /// True if this dimension included the 'static' keyword. |
1230 | unsigned hasStatic : 1; |
1231 | |
1232 | /// True if this dimension was [*]. In this case, NumElts is null. |
1233 | unsigned isStar : 1; |
1234 | |
1235 | /// This is the size of the array, or null if [] or [*] was specified. |
1236 | /// Since the parser is multi-purpose, and we don't want to impose a root |
1237 | /// expression class on all clients, NumElts is untyped. |
1238 | Expr *NumElts; |
1239 | |
1240 | void destroy() {} |
1241 | }; |
1242 | |
1243 | /// ParamInfo - An array of paraminfo objects is allocated whenever a function |
1244 | /// declarator is parsed. There are two interesting styles of parameters |
1245 | /// here: |
1246 | /// K&R-style identifier lists and parameter type lists. K&R-style identifier |
1247 | /// lists will have information about the identifier, but no type information. |
1248 | /// Parameter type lists will have type info (if the actions module provides |
1249 | /// it), but may have null identifier info: e.g. for 'void foo(int X, int)'. |
1250 | struct ParamInfo { |
1251 | IdentifierInfo *Ident; |
1252 | SourceLocation IdentLoc; |
1253 | Decl *Param; |
1254 | |
1255 | /// DefaultArgTokens - When the parameter's default argument |
1256 | /// cannot be parsed immediately (because it occurs within the |
1257 | /// declaration of a member function), it will be stored here as a |
1258 | /// sequence of tokens to be parsed once the class definition is |
1259 | /// complete. Non-NULL indicates that there is a default argument. |
1260 | std::unique_ptr<CachedTokens> DefaultArgTokens; |
1261 | |
1262 | ParamInfo() = default; |
1263 | ParamInfo(IdentifierInfo *ident, SourceLocation iloc, |
1264 | Decl *param, |
1265 | std::unique_ptr<CachedTokens> DefArgTokens = nullptr) |
1266 | : Ident(ident), IdentLoc(iloc), Param(param), |
1267 | DefaultArgTokens(std::move(DefArgTokens)) {} |
1268 | }; |
1269 | |
1270 | struct TypeAndRange { |
1271 | ParsedType Ty; |
1272 | SourceRange Range; |
1273 | }; |
1274 | |
1275 | struct FunctionTypeInfo { |
1276 | /// hasPrototype - This is true if the function had at least one typed |
1277 | /// parameter. If the function is () or (a,b,c), then it has no prototype, |
1278 | /// and is treated as a K&R-style function. |
1279 | unsigned hasPrototype : 1; |
1280 | |
1281 | /// isVariadic - If this function has a prototype, and if that |
1282 | /// proto ends with ',...)', this is true. When true, EllipsisLoc |
1283 | /// contains the location of the ellipsis. |
1284 | unsigned isVariadic : 1; |
1285 | |
1286 | /// Can this declaration be a constructor-style initializer? |
1287 | unsigned isAmbiguous : 1; |
1288 | |
1289 | /// Whether the ref-qualifier (if any) is an lvalue reference. |
1290 | /// Otherwise, it's an rvalue reference. |
1291 | unsigned RefQualifierIsLValueRef : 1; |
1292 | |
1293 | /// ExceptionSpecType - An ExceptionSpecificationType value. |
1294 | unsigned ExceptionSpecType : 4; |
1295 | |
1296 | /// DeleteParams - If this is true, we need to delete[] Params. |
1297 | unsigned DeleteParams : 1; |
1298 | |
1299 | /// HasTrailingReturnType - If this is true, a trailing return type was |
1300 | /// specified. |
1301 | unsigned HasTrailingReturnType : 1; |
1302 | |
1303 | /// The location of the left parenthesis in the source. |
1304 | unsigned LParenLoc; |
1305 | |
1306 | /// When isVariadic is true, the location of the ellipsis in the source. |
1307 | unsigned EllipsisLoc; |
1308 | |
1309 | /// The location of the right parenthesis in the source. |
1310 | unsigned RParenLoc; |
1311 | |
1312 | /// NumParams - This is the number of formal parameters specified by the |
1313 | /// declarator. |
1314 | unsigned NumParams; |
1315 | |
1316 | /// NumExceptionsOrDecls - This is the number of types in the |
1317 | /// dynamic-exception-decl, if the function has one. In C, this is the |
1318 | /// number of declarations in the function prototype. |
1319 | unsigned NumExceptionsOrDecls; |
1320 | |
1321 | /// The location of the ref-qualifier, if any. |
1322 | /// |
1323 | /// If this is an invalid location, there is no ref-qualifier. |
1324 | unsigned RefQualifierLoc; |
1325 | |
1326 | /// The location of the 'mutable' qualifer in a lambda-declarator, if |
1327 | /// any. |
1328 | unsigned MutableLoc; |
1329 | |
1330 | /// The beginning location of the exception specification, if any. |
1331 | unsigned ExceptionSpecLocBeg; |
1332 | |
1333 | /// The end location of the exception specification, if any. |
1334 | unsigned ExceptionSpecLocEnd; |
1335 | |
1336 | /// Params - This is a pointer to a new[]'d array of ParamInfo objects that |
1337 | /// describe the parameters specified by this function declarator. null if |
1338 | /// there are no parameters specified. |
1339 | ParamInfo *Params; |
1340 | |
1341 | /// DeclSpec for the function with the qualifier related info. |
1342 | DeclSpec *MethodQualifiers; |
1343 | |
1344 | /// AtttibuteFactory for the MethodQualifiers. |
1345 | AttributeFactory *QualAttrFactory; |
1346 | |
1347 | union { |
1348 | /// Pointer to a new[]'d array of TypeAndRange objects that |
1349 | /// contain the types in the function's dynamic exception specification |
1350 | /// and their locations, if there is one. |
1351 | TypeAndRange *Exceptions; |
1352 | |
1353 | /// Pointer to the expression in the noexcept-specifier of this |
1354 | /// function, if it has one. |
1355 | Expr *NoexceptExpr; |
1356 | |
1357 | /// Pointer to the cached tokens for an exception-specification |
1358 | /// that has not yet been parsed. |
1359 | CachedTokens *ExceptionSpecTokens; |
1360 | |
1361 | /// Pointer to a new[]'d array of declarations that need to be available |
1362 | /// for lookup inside the function body, if one exists. Does not exist in |
1363 | /// C++. |
1364 | NamedDecl **DeclsInPrototype; |
1365 | }; |
1366 | |
1367 | /// If HasTrailingReturnType is true, this is the trailing return |
1368 | /// type specified. |
1369 | UnionParsedType TrailingReturnType; |
1370 | |
1371 | /// Reset the parameter list to having zero parameters. |
1372 | /// |
1373 | /// This is used in various places for error recovery. |
1374 | void freeParams() { |
1375 | for (unsigned I = 0; I < NumParams; ++I) |
1376 | Params[I].DefaultArgTokens.reset(); |
1377 | if (DeleteParams) { |
1378 | delete[] Params; |
1379 | DeleteParams = false; |
1380 | } |
1381 | NumParams = 0; |
1382 | } |
1383 | |
1384 | void destroy() { |
1385 | freeParams(); |
1386 | delete QualAttrFactory; |
1387 | delete MethodQualifiers; |
1388 | switch (getExceptionSpecType()) { |
1389 | default: |
1390 | break; |
1391 | case EST_Dynamic: |
1392 | delete[] Exceptions; |
1393 | break; |
1394 | case EST_Unparsed: |
1395 | delete ExceptionSpecTokens; |
1396 | break; |
1397 | case EST_None: |
1398 | if (NumExceptionsOrDecls != 0) |
1399 | delete[] DeclsInPrototype; |
1400 | break; |
1401 | } |
1402 | } |
1403 | |
1404 | DeclSpec &getOrCreateMethodQualifiers() { |
1405 | if (!MethodQualifiers) { |
1406 | QualAttrFactory = new AttributeFactory(); |
1407 | MethodQualifiers = new DeclSpec(*QualAttrFactory); |
1408 | } |
1409 | return *MethodQualifiers; |
1410 | } |
1411 | |
1412 | /// isKNRPrototype - Return true if this is a K&R style identifier list, |
1413 | /// like "void foo(a,b,c)". In a function definition, this will be followed |
1414 | /// by the parameter type definitions. |
1415 | bool isKNRPrototype() const { return !hasPrototype && NumParams != 0; } |
1416 | |
1417 | SourceLocation getLParenLoc() const { |
1418 | return SourceLocation::getFromRawEncoding(LParenLoc); |
1419 | } |
1420 | |
1421 | SourceLocation getEllipsisLoc() const { |
1422 | return SourceLocation::getFromRawEncoding(EllipsisLoc); |
1423 | } |
1424 | |
1425 | SourceLocation getRParenLoc() const { |
1426 | return SourceLocation::getFromRawEncoding(RParenLoc); |
1427 | } |
1428 | |
1429 | SourceLocation getExceptionSpecLocBeg() const { |
1430 | return SourceLocation::getFromRawEncoding(ExceptionSpecLocBeg); |
1431 | } |
1432 | |
1433 | SourceLocation getExceptionSpecLocEnd() const { |
1434 | return SourceLocation::getFromRawEncoding(ExceptionSpecLocEnd); |
1435 | } |
1436 | |
1437 | SourceRange getExceptionSpecRange() const { |
1438 | return SourceRange(getExceptionSpecLocBeg(), getExceptionSpecLocEnd()); |
1439 | } |
1440 | |
1441 | /// Retrieve the location of the ref-qualifier, if any. |
1442 | SourceLocation getRefQualifierLoc() const { |
1443 | return SourceLocation::getFromRawEncoding(RefQualifierLoc); |
1444 | } |
1445 | |
1446 | /// Retrieve the location of the 'const' qualifier. |
1447 | SourceLocation getConstQualifierLoc() const { |
1448 | assert(MethodQualifiers)((MethodQualifiers) ? static_cast<void> (0) : __assert_fail ("MethodQualifiers", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Sema/DeclSpec.h" , 1448, __PRETTY_FUNCTION__)); |
1449 | return MethodQualifiers->getConstSpecLoc(); |
1450 | } |
1451 | |
1452 | /// Retrieve the location of the 'volatile' qualifier. |
1453 | SourceLocation getVolatileQualifierLoc() const { |
1454 | assert(MethodQualifiers)((MethodQualifiers) ? static_cast<void> (0) : __assert_fail ("MethodQualifiers", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Sema/DeclSpec.h" , 1454, __PRETTY_FUNCTION__)); |
1455 | return MethodQualifiers->getVolatileSpecLoc(); |
1456 | } |
1457 | |
1458 | /// Retrieve the location of the 'restrict' qualifier. |
1459 | SourceLocation getRestrictQualifierLoc() const { |
1460 | assert(MethodQualifiers)((MethodQualifiers) ? static_cast<void> (0) : __assert_fail ("MethodQualifiers", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Sema/DeclSpec.h" , 1460, __PRETTY_FUNCTION__)); |
1461 | return MethodQualifiers->getRestrictSpecLoc(); |
1462 | } |
1463 | |
1464 | /// Retrieve the location of the 'mutable' qualifier, if any. |
1465 | SourceLocation getMutableLoc() const { |
1466 | return SourceLocation::getFromRawEncoding(MutableLoc); |
1467 | } |
1468 | |
1469 | /// Determine whether this function declaration contains a |
1470 | /// ref-qualifier. |
1471 | bool hasRefQualifier() const { return getRefQualifierLoc().isValid(); } |
1472 | |
1473 | /// Determine whether this lambda-declarator contains a 'mutable' |
1474 | /// qualifier. |
1475 | bool hasMutableQualifier() const { return getMutableLoc().isValid(); } |
1476 | |
1477 | /// Determine whether this method has qualifiers. |
1478 | bool hasMethodTypeQualifiers() const { |
1479 | return MethodQualifiers && (MethodQualifiers->getTypeQualifiers() || |
1480 | MethodQualifiers->getAttributes().size()); |
1481 | } |
1482 | |
1483 | /// Get the type of exception specification this function has. |
1484 | ExceptionSpecificationType getExceptionSpecType() const { |
1485 | return static_cast<ExceptionSpecificationType>(ExceptionSpecType); |
1486 | } |
1487 | |
1488 | /// Get the number of dynamic exception specifications. |
1489 | unsigned getNumExceptions() const { |
1490 | assert(ExceptionSpecType != EST_None)((ExceptionSpecType != EST_None) ? static_cast<void> (0 ) : __assert_fail ("ExceptionSpecType != EST_None", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Sema/DeclSpec.h" , 1490, __PRETTY_FUNCTION__)); |
1491 | return NumExceptionsOrDecls; |
1492 | } |
1493 | |
1494 | /// Get the non-parameter decls defined within this function |
1495 | /// prototype. Typically these are tag declarations. |
1496 | ArrayRef<NamedDecl *> getDeclsInPrototype() const { |
1497 | assert(ExceptionSpecType == EST_None)((ExceptionSpecType == EST_None) ? static_cast<void> (0 ) : __assert_fail ("ExceptionSpecType == EST_None", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Sema/DeclSpec.h" , 1497, __PRETTY_FUNCTION__)); |
1498 | return llvm::makeArrayRef(DeclsInPrototype, NumExceptionsOrDecls); |
1499 | } |
1500 | |
1501 | /// Determine whether this function declarator had a |
1502 | /// trailing-return-type. |
1503 | bool hasTrailingReturnType() const { return HasTrailingReturnType; } |
1504 | |
1505 | /// Get the trailing-return-type for this function declarator. |
1506 | ParsedType getTrailingReturnType() const { return TrailingReturnType; } |
1507 | }; |
1508 | |
1509 | struct BlockPointerTypeInfo { |
1510 | /// For now, sema will catch these as invalid. |
1511 | /// The type qualifiers: const/volatile/restrict/__unaligned/_Atomic. |
1512 | unsigned TypeQuals : 5; |
1513 | |
1514 | void destroy() { |
1515 | } |
1516 | }; |
1517 | |
1518 | struct MemberPointerTypeInfo { |
1519 | /// The type qualifiers: const/volatile/restrict/__unaligned/_Atomic. |
1520 | unsigned TypeQuals : 5; |
1521 | // CXXScopeSpec has a constructor, so it can't be a direct member. |
1522 | // So we need some pointer-aligned storage and a bit of trickery. |
1523 | alignas(CXXScopeSpec) char ScopeMem[sizeof(CXXScopeSpec)]; |
1524 | CXXScopeSpec &Scope() { |
1525 | return *reinterpret_cast<CXXScopeSpec *>(ScopeMem); |
1526 | } |
1527 | const CXXScopeSpec &Scope() const { |
1528 | return *reinterpret_cast<const CXXScopeSpec *>(ScopeMem); |
1529 | } |
1530 | void destroy() { |
1531 | Scope().~CXXScopeSpec(); |
1532 | } |
1533 | }; |
1534 | |
1535 | struct PipeTypeInfo { |
1536 | /// The access writes. |
1537 | unsigned AccessWrites : 3; |
1538 | |
1539 | void destroy() {} |
1540 | }; |
1541 | |
1542 | union { |
1543 | PointerTypeInfo Ptr; |
1544 | ReferenceTypeInfo Ref; |
1545 | ArrayTypeInfo Arr; |
1546 | FunctionTypeInfo Fun; |
1547 | BlockPointerTypeInfo Cls; |
1548 | MemberPointerTypeInfo Mem; |
1549 | PipeTypeInfo PipeInfo; |
1550 | }; |
1551 | |
1552 | void destroy() { |
1553 | switch (Kind) { |
1554 | case DeclaratorChunk::Function: return Fun.destroy(); |
1555 | case DeclaratorChunk::Pointer: return Ptr.destroy(); |
1556 | case DeclaratorChunk::BlockPointer: return Cls.destroy(); |
1557 | case DeclaratorChunk::Reference: return Ref.destroy(); |
1558 | case DeclaratorChunk::Array: return Arr.destroy(); |
1559 | case DeclaratorChunk::MemberPointer: return Mem.destroy(); |
1560 | case DeclaratorChunk::Paren: return; |
1561 | case DeclaratorChunk::Pipe: return PipeInfo.destroy(); |
1562 | } |
1563 | } |
1564 | |
1565 | /// If there are attributes applied to this declaratorchunk, return |
1566 | /// them. |
1567 | const ParsedAttributesView &getAttrs() const { return AttrList; } |
1568 | ParsedAttributesView &getAttrs() { return AttrList; } |
1569 | |
1570 | /// Return a DeclaratorChunk for a pointer. |
1571 | static DeclaratorChunk getPointer(unsigned TypeQuals, SourceLocation Loc, |
1572 | SourceLocation ConstQualLoc, |
1573 | SourceLocation VolatileQualLoc, |
1574 | SourceLocation RestrictQualLoc, |
1575 | SourceLocation AtomicQualLoc, |
1576 | SourceLocation UnalignedQualLoc) { |
1577 | DeclaratorChunk I; |
1578 | I.Kind = Pointer; |
1579 | I.Loc = Loc; |
1580 | I.Ptr.TypeQuals = TypeQuals; |
1581 | I.Ptr.ConstQualLoc = ConstQualLoc.getRawEncoding(); |
1582 | I.Ptr.VolatileQualLoc = VolatileQualLoc.getRawEncoding(); |
1583 | I.Ptr.RestrictQualLoc = RestrictQualLoc.getRawEncoding(); |
1584 | I.Ptr.AtomicQualLoc = AtomicQualLoc.getRawEncoding(); |
1585 | I.Ptr.UnalignedQualLoc = UnalignedQualLoc.getRawEncoding(); |
1586 | return I; |
1587 | } |
1588 | |
1589 | /// Return a DeclaratorChunk for a reference. |
1590 | static DeclaratorChunk getReference(unsigned TypeQuals, SourceLocation Loc, |
1591 | bool lvalue) { |
1592 | DeclaratorChunk I; |
1593 | I.Kind = Reference; |
1594 | I.Loc = Loc; |
1595 | I.Ref.HasRestrict = (TypeQuals & DeclSpec::TQ_restrict) != 0; |
1596 | I.Ref.LValueRef = lvalue; |
1597 | return I; |
1598 | } |
1599 | |
1600 | /// Return a DeclaratorChunk for an array. |
1601 | static DeclaratorChunk getArray(unsigned TypeQuals, |
1602 | bool isStatic, bool isStar, Expr *NumElts, |
1603 | SourceLocation LBLoc, SourceLocation RBLoc) { |
1604 | DeclaratorChunk I; |
1605 | I.Kind = Array; |
1606 | I.Loc = LBLoc; |
1607 | I.EndLoc = RBLoc; |
1608 | I.Arr.TypeQuals = TypeQuals; |
1609 | I.Arr.hasStatic = isStatic; |
1610 | I.Arr.isStar = isStar; |
1611 | I.Arr.NumElts = NumElts; |
1612 | return I; |
1613 | } |
1614 | |
1615 | /// DeclaratorChunk::getFunction - Return a DeclaratorChunk for a function. |
1616 | /// "TheDeclarator" is the declarator that this will be added to. |
1617 | static DeclaratorChunk getFunction(bool HasProto, |
1618 | bool IsAmbiguous, |
1619 | SourceLocation LParenLoc, |
1620 | ParamInfo *Params, unsigned NumParams, |
1621 | SourceLocation EllipsisLoc, |
1622 | SourceLocation RParenLoc, |
1623 | bool RefQualifierIsLvalueRef, |
1624 | SourceLocation RefQualifierLoc, |
1625 | SourceLocation MutableLoc, |
1626 | ExceptionSpecificationType ESpecType, |
1627 | SourceRange ESpecRange, |
1628 | ParsedType *Exceptions, |
1629 | SourceRange *ExceptionRanges, |
1630 | unsigned NumExceptions, |
1631 | Expr *NoexceptExpr, |
1632 | CachedTokens *ExceptionSpecTokens, |
1633 | ArrayRef<NamedDecl *> DeclsInPrototype, |
1634 | SourceLocation LocalRangeBegin, |
1635 | SourceLocation LocalRangeEnd, |
1636 | Declarator &TheDeclarator, |
1637 | TypeResult TrailingReturnType = |
1638 | TypeResult(), |
1639 | DeclSpec *MethodQualifiers = nullptr); |
1640 | |
1641 | /// Return a DeclaratorChunk for a block. |
1642 | static DeclaratorChunk getBlockPointer(unsigned TypeQuals, |
1643 | SourceLocation Loc) { |
1644 | DeclaratorChunk I; |
1645 | I.Kind = BlockPointer; |
1646 | I.Loc = Loc; |
1647 | I.Cls.TypeQuals = TypeQuals; |
1648 | return I; |
1649 | } |
1650 | |
1651 | /// Return a DeclaratorChunk for a block. |
1652 | static DeclaratorChunk getPipe(unsigned TypeQuals, |
1653 | SourceLocation Loc) { |
1654 | DeclaratorChunk I; |
1655 | I.Kind = Pipe; |
1656 | I.Loc = Loc; |
1657 | I.Cls.TypeQuals = TypeQuals; |
1658 | return I; |
1659 | } |
1660 | |
1661 | static DeclaratorChunk getMemberPointer(const CXXScopeSpec &SS, |
1662 | unsigned TypeQuals, |
1663 | SourceLocation Loc) { |
1664 | DeclaratorChunk I; |
1665 | I.Kind = MemberPointer; |
1666 | I.Loc = SS.getBeginLoc(); |
1667 | I.EndLoc = Loc; |
1668 | I.Mem.TypeQuals = TypeQuals; |
1669 | new (I.Mem.ScopeMem) CXXScopeSpec(SS); |
1670 | return I; |
1671 | } |
1672 | |
1673 | /// Return a DeclaratorChunk for a paren. |
1674 | static DeclaratorChunk getParen(SourceLocation LParenLoc, |
1675 | SourceLocation RParenLoc) { |
1676 | DeclaratorChunk I; |
1677 | I.Kind = Paren; |
1678 | I.Loc = LParenLoc; |
1679 | I.EndLoc = RParenLoc; |
1680 | return I; |
1681 | } |
1682 | |
1683 | bool isParen() const { |
1684 | return Kind == Paren; |
1685 | } |
1686 | }; |
1687 | |
1688 | /// A parsed C++17 decomposition declarator of the form |
1689 | /// '[' identifier-list ']' |
1690 | class DecompositionDeclarator { |
1691 | public: |
1692 | struct Binding { |
1693 | IdentifierInfo *Name; |
1694 | SourceLocation NameLoc; |
1695 | }; |
1696 | |
1697 | private: |
1698 | /// The locations of the '[' and ']' tokens. |
1699 | SourceLocation LSquareLoc, RSquareLoc; |
1700 | |
1701 | /// The bindings. |
1702 | Binding *Bindings; |
1703 | unsigned NumBindings : 31; |
1704 | unsigned DeleteBindings : 1; |
1705 | |
1706 | friend class Declarator; |
1707 | |
1708 | public: |
1709 | DecompositionDeclarator() |
1710 | : Bindings(nullptr), NumBindings(0), DeleteBindings(false) {} |
1711 | DecompositionDeclarator(const DecompositionDeclarator &G) = delete; |
1712 | DecompositionDeclarator &operator=(const DecompositionDeclarator &G) = delete; |
1713 | ~DecompositionDeclarator() { |
1714 | if (DeleteBindings) |
1715 | delete[] Bindings; |
1716 | } |
1717 | |
1718 | void clear() { |
1719 | LSquareLoc = RSquareLoc = SourceLocation(); |
1720 | if (DeleteBindings) |
1721 | delete[] Bindings; |
1722 | Bindings = nullptr; |
1723 | NumBindings = 0; |
1724 | DeleteBindings = false; |
1725 | } |
1726 | |
1727 | ArrayRef<Binding> bindings() const { |
1728 | return llvm::makeArrayRef(Bindings, NumBindings); |
1729 | } |
1730 | |
1731 | bool isSet() const { return LSquareLoc.isValid(); } |
1732 | |
1733 | SourceLocation getLSquareLoc() const { return LSquareLoc; } |
1734 | SourceLocation getRSquareLoc() const { return RSquareLoc; } |
1735 | SourceRange getSourceRange() const { |
1736 | return SourceRange(LSquareLoc, RSquareLoc); |
1737 | } |
1738 | }; |
1739 | |
1740 | /// Described the kind of function definition (if any) provided for |
1741 | /// a function. |
1742 | enum FunctionDefinitionKind { |
1743 | FDK_Declaration, |
1744 | FDK_Definition, |
1745 | FDK_Defaulted, |
1746 | FDK_Deleted |
1747 | }; |
1748 | |
1749 | enum class DeclaratorContext { |
1750 | FileContext, // File scope declaration. |
1751 | PrototypeContext, // Within a function prototype. |
1752 | ObjCResultContext, // An ObjC method result type. |
1753 | ObjCParameterContext,// An ObjC method parameter type. |
1754 | KNRTypeListContext, // K&R type definition list for formals. |
1755 | TypeNameContext, // Abstract declarator for types. |
1756 | FunctionalCastContext, // Type in a C++ functional cast expression. |
1757 | MemberContext, // Struct/Union field. |
1758 | BlockContext, // Declaration within a block in a function. |
1759 | ForContext, // Declaration within first part of a for loop. |
1760 | InitStmtContext, // Declaration within optional init stmt of if/switch. |
1761 | ConditionContext, // Condition declaration in a C++ if/switch/while/for. |
1762 | TemplateParamContext,// Within a template parameter list. |
1763 | CXXNewContext, // C++ new-expression. |
1764 | CXXCatchContext, // C++ catch exception-declaration |
1765 | ObjCCatchContext, // Objective-C catch exception-declaration |
1766 | BlockLiteralContext, // Block literal declarator. |
1767 | LambdaExprContext, // Lambda-expression declarator. |
1768 | LambdaExprParameterContext, // Lambda-expression parameter declarator. |
1769 | ConversionIdContext, // C++ conversion-type-id. |
1770 | TrailingReturnContext, // C++11 trailing-type-specifier. |
1771 | TrailingReturnVarContext, // C++11 trailing-type-specifier for variable. |
1772 | TemplateArgContext, // Any template argument (in template argument list). |
1773 | TemplateTypeArgContext, // Template type argument (in default argument). |
1774 | AliasDeclContext, // C++11 alias-declaration. |
1775 | AliasTemplateContext, // C++11 alias-declaration template. |
1776 | RequiresExprContext // C++2a requires-expression. |
1777 | }; |
1778 | |
1779 | |
1780 | /// Information about one declarator, including the parsed type |
1781 | /// information and the identifier. |
1782 | /// |
1783 | /// When the declarator is fully formed, this is turned into the appropriate |
1784 | /// Decl object. |
1785 | /// |
1786 | /// Declarators come in two types: normal declarators and abstract declarators. |
1787 | /// Abstract declarators are used when parsing types, and don't have an |
1788 | /// identifier. Normal declarators do have ID's. |
1789 | /// |
1790 | /// Instances of this class should be a transient object that lives on the |
1791 | /// stack, not objects that are allocated in large quantities on the heap. |
1792 | class Declarator { |
1793 | |
1794 | private: |
1795 | const DeclSpec &DS; |
1796 | CXXScopeSpec SS; |
1797 | UnqualifiedId Name; |
1798 | SourceRange Range; |
1799 | |
1800 | /// Where we are parsing this declarator. |
1801 | DeclaratorContext Context; |
1802 | |
1803 | /// The C++17 structured binding, if any. This is an alternative to a Name. |
1804 | DecompositionDeclarator BindingGroup; |
1805 | |
1806 | /// DeclTypeInfo - This holds each type that the declarator includes as it is |
1807 | /// parsed. This is pushed from the identifier out, which means that element |
1808 | /// #0 will be the most closely bound to the identifier, and |
1809 | /// DeclTypeInfo.back() will be the least closely bound. |
1810 | SmallVector<DeclaratorChunk, 8> DeclTypeInfo; |
1811 | |
1812 | /// InvalidType - Set by Sema::GetTypeForDeclarator(). |
1813 | unsigned InvalidType : 1; |
1814 | |
1815 | /// GroupingParens - Set by Parser::ParseParenDeclarator(). |
1816 | unsigned GroupingParens : 1; |
1817 | |
1818 | /// FunctionDefinition - Is this Declarator for a function or member |
1819 | /// definition and, if so, what kind? |
1820 | /// |
1821 | /// Actually a FunctionDefinitionKind. |
1822 | unsigned FunctionDefinition : 2; |
1823 | |
1824 | /// Is this Declarator a redeclaration? |
1825 | unsigned Redeclaration : 1; |
1826 | |
1827 | /// true if the declaration is preceded by \c __extension__. |
1828 | unsigned Extension : 1; |
1829 | |
1830 | /// Indicates whether this is an Objective-C instance variable. |
1831 | unsigned ObjCIvar : 1; |
1832 | |
1833 | /// Indicates whether this is an Objective-C 'weak' property. |
1834 | unsigned ObjCWeakProperty : 1; |
1835 | |
1836 | /// Indicates whether the InlineParams / InlineBindings storage has been used. |
1837 | unsigned InlineStorageUsed : 1; |
1838 | |
1839 | /// Attrs - Attributes. |
1840 | ParsedAttributes Attrs; |
1841 | |
1842 | /// The asm label, if specified. |
1843 | Expr *AsmLabel; |
1844 | |
1845 | /// \brief The constraint-expression specified by the trailing |
1846 | /// requires-clause, or null if no such clause was specified. |
1847 | Expr *TrailingRequiresClause; |
1848 | |
1849 | /// If this declarator declares a template, its template parameter lists. |
1850 | ArrayRef<TemplateParameterList *> TemplateParameterLists; |
1851 | |
1852 | /// If the declarator declares an abbreviated function template, the innermost |
1853 | /// template parameter list containing the invented and explicit template |
1854 | /// parameters (if any). |
1855 | TemplateParameterList *InventedTemplateParameterList; |
1856 | |
1857 | #ifndef _MSC_VER |
1858 | union { |
1859 | #endif |
1860 | /// InlineParams - This is a local array used for the first function decl |
1861 | /// chunk to avoid going to the heap for the common case when we have one |
1862 | /// function chunk in the declarator. |
1863 | DeclaratorChunk::ParamInfo InlineParams[16]; |
1864 | DecompositionDeclarator::Binding InlineBindings[16]; |
1865 | #ifndef _MSC_VER |
1866 | }; |
1867 | #endif |
1868 | |
1869 | /// If this is the second or subsequent declarator in this declaration, |
1870 | /// the location of the comma before this declarator. |
1871 | SourceLocation CommaLoc; |
1872 | |
1873 | /// If provided, the source location of the ellipsis used to describe |
1874 | /// this declarator as a parameter pack. |
1875 | SourceLocation EllipsisLoc; |
1876 | |
1877 | friend struct DeclaratorChunk; |
1878 | |
1879 | public: |
1880 | Declarator(const DeclSpec &ds, DeclaratorContext C) |
1881 | : DS(ds), Range(ds.getSourceRange()), Context(C), |
1882 | InvalidType(DS.getTypeSpecType() == DeclSpec::TST_error), |
1883 | GroupingParens(false), FunctionDefinition(FDK_Declaration), |
1884 | Redeclaration(false), Extension(false), ObjCIvar(false), |
1885 | ObjCWeakProperty(false), InlineStorageUsed(false), |
1886 | Attrs(ds.getAttributePool().getFactory()), AsmLabel(nullptr), |
1887 | TrailingRequiresClause(nullptr), |
1888 | InventedTemplateParameterList(nullptr) {} |
1889 | |
1890 | ~Declarator() { |
1891 | clear(); |
1892 | } |
1893 | /// getDeclSpec - Return the declaration-specifier that this declarator was |
1894 | /// declared with. |
1895 | const DeclSpec &getDeclSpec() const { return DS; } |
1896 | |
1897 | /// getMutableDeclSpec - Return a non-const version of the DeclSpec. This |
1898 | /// should be used with extreme care: declspecs can often be shared between |
1899 | /// multiple declarators, so mutating the DeclSpec affects all of the |
1900 | /// Declarators. This should only be done when the declspec is known to not |
1901 | /// be shared or when in error recovery etc. |
1902 | DeclSpec &getMutableDeclSpec() { return const_cast<DeclSpec &>(DS); } |
1903 | |
1904 | AttributePool &getAttributePool() const { |
1905 | return Attrs.getPool(); |
1906 | } |
1907 | |
1908 | /// getCXXScopeSpec - Return the C++ scope specifier (global scope or |
1909 | /// nested-name-specifier) that is part of the declarator-id. |
1910 | const CXXScopeSpec &getCXXScopeSpec() const { return SS; } |
1911 | CXXScopeSpec &getCXXScopeSpec() { return SS; } |
1912 | |
1913 | /// Retrieve the name specified by this declarator. |
1914 | UnqualifiedId &getName() { return Name; } |
1915 | |
1916 | const DecompositionDeclarator &getDecompositionDeclarator() const { |
1917 | return BindingGroup; |
1918 | } |
1919 | |
1920 | DeclaratorContext getContext() const { return Context; } |
1921 | |
1922 | bool isPrototypeContext() const { |
1923 | return (Context == DeclaratorContext::PrototypeContext || |
1924 | Context == DeclaratorContext::ObjCParameterContext || |
1925 | Context == DeclaratorContext::ObjCResultContext || |
1926 | Context == DeclaratorContext::LambdaExprParameterContext); |
1927 | } |
1928 | |
1929 | /// Get the source range that spans this declarator. |
1930 | SourceRange getSourceRange() const LLVM_READONLY__attribute__((__pure__)) { return Range; } |
1931 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return Range.getBegin(); } |
1932 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { return Range.getEnd(); } |
1933 | |
1934 | void SetSourceRange(SourceRange R) { Range = R; } |
1935 | /// SetRangeBegin - Set the start of the source range to Loc, unless it's |
1936 | /// invalid. |
1937 | void SetRangeBegin(SourceLocation Loc) { |
1938 | if (!Loc.isInvalid()) |
1939 | Range.setBegin(Loc); |
1940 | } |
1941 | /// SetRangeEnd - Set the end of the source range to Loc, unless it's invalid. |
1942 | void SetRangeEnd(SourceLocation Loc) { |
1943 | if (!Loc.isInvalid()) |
1944 | Range.setEnd(Loc); |
1945 | } |
1946 | /// ExtendWithDeclSpec - Extend the declarator source range to include the |
1947 | /// given declspec, unless its location is invalid. Adopts the range start if |
1948 | /// the current range start is invalid. |
1949 | void ExtendWithDeclSpec(const DeclSpec &DS) { |
1950 | SourceRange SR = DS.getSourceRange(); |
1951 | if (Range.getBegin().isInvalid()) |
1952 | Range.setBegin(SR.getBegin()); |
1953 | if (!SR.getEnd().isInvalid()) |
1954 | Range.setEnd(SR.getEnd()); |
1955 | } |
1956 | |
1957 | /// Reset the contents of this Declarator. |
1958 | void clear() { |
1959 | SS.clear(); |
1960 | Name.clear(); |
1961 | Range = DS.getSourceRange(); |
1962 | BindingGroup.clear(); |
1963 | |
1964 | for (unsigned i = 0, e = DeclTypeInfo.size(); i != e; ++i) |
1965 | DeclTypeInfo[i].destroy(); |
1966 | DeclTypeInfo.clear(); |
1967 | Attrs.clear(); |
1968 | AsmLabel = nullptr; |
1969 | InlineStorageUsed = false; |
1970 | ObjCIvar = false; |
1971 | ObjCWeakProperty = false; |
1972 | CommaLoc = SourceLocation(); |
1973 | EllipsisLoc = SourceLocation(); |
1974 | } |
1975 | |
1976 | /// mayOmitIdentifier - Return true if the identifier is either optional or |
1977 | /// not allowed. This is true for typenames, prototypes, and template |
1978 | /// parameter lists. |
1979 | bool mayOmitIdentifier() const { |
1980 | switch (Context) { |
1981 | case DeclaratorContext::FileContext: |
1982 | case DeclaratorContext::KNRTypeListContext: |
1983 | case DeclaratorContext::MemberContext: |
1984 | case DeclaratorContext::BlockContext: |
1985 | case DeclaratorContext::ForContext: |
1986 | case DeclaratorContext::InitStmtContext: |
1987 | case DeclaratorContext::ConditionContext: |
1988 | return false; |
1989 | |
1990 | case DeclaratorContext::TypeNameContext: |
1991 | case DeclaratorContext::FunctionalCastContext: |
1992 | case DeclaratorContext::AliasDeclContext: |
1993 | case DeclaratorContext::AliasTemplateContext: |
1994 | case DeclaratorContext::PrototypeContext: |
1995 | case DeclaratorContext::LambdaExprParameterContext: |
1996 | case DeclaratorContext::ObjCParameterContext: |
1997 | case DeclaratorContext::ObjCResultContext: |
1998 | case DeclaratorContext::TemplateParamContext: |
1999 | case DeclaratorContext::CXXNewContext: |
2000 | case DeclaratorContext::CXXCatchContext: |
2001 | case DeclaratorContext::ObjCCatchContext: |
2002 | case DeclaratorContext::BlockLiteralContext: |
2003 | case DeclaratorContext::LambdaExprContext: |
2004 | case DeclaratorContext::ConversionIdContext: |
2005 | case DeclaratorContext::TemplateArgContext: |
2006 | case DeclaratorContext::TemplateTypeArgContext: |
2007 | case DeclaratorContext::TrailingReturnContext: |
2008 | case DeclaratorContext::TrailingReturnVarContext: |
2009 | case DeclaratorContext::RequiresExprContext: |
2010 | return true; |
2011 | } |
2012 | llvm_unreachable("unknown context kind!")::llvm::llvm_unreachable_internal("unknown context kind!", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Sema/DeclSpec.h" , 2012); |
2013 | } |
2014 | |
2015 | /// mayHaveIdentifier - Return true if the identifier is either optional or |
2016 | /// required. This is true for normal declarators and prototypes, but not |
2017 | /// typenames. |
2018 | bool mayHaveIdentifier() const { |
2019 | switch (Context) { |
2020 | case DeclaratorContext::FileContext: |
2021 | case DeclaratorContext::KNRTypeListContext: |
2022 | case DeclaratorContext::MemberContext: |
2023 | case DeclaratorContext::BlockContext: |
2024 | case DeclaratorContext::ForContext: |
2025 | case DeclaratorContext::InitStmtContext: |
2026 | case DeclaratorContext::ConditionContext: |
2027 | case DeclaratorContext::PrototypeContext: |
2028 | case DeclaratorContext::LambdaExprParameterContext: |
2029 | case DeclaratorContext::TemplateParamContext: |
2030 | case DeclaratorContext::CXXCatchContext: |
2031 | case DeclaratorContext::ObjCCatchContext: |
2032 | case DeclaratorContext::RequiresExprContext: |
2033 | return true; |
2034 | |
2035 | case DeclaratorContext::TypeNameContext: |
2036 | case DeclaratorContext::FunctionalCastContext: |
2037 | case DeclaratorContext::CXXNewContext: |
2038 | case DeclaratorContext::AliasDeclContext: |
2039 | case DeclaratorContext::AliasTemplateContext: |
2040 | case DeclaratorContext::ObjCParameterContext: |
2041 | case DeclaratorContext::ObjCResultContext: |
2042 | case DeclaratorContext::BlockLiteralContext: |
2043 | case DeclaratorContext::LambdaExprContext: |
2044 | case DeclaratorContext::ConversionIdContext: |
2045 | case DeclaratorContext::TemplateArgContext: |
2046 | case DeclaratorContext::TemplateTypeArgContext: |
2047 | case DeclaratorContext::TrailingReturnContext: |
2048 | case DeclaratorContext::TrailingReturnVarContext: |
2049 | return false; |
2050 | } |
2051 | llvm_unreachable("unknown context kind!")::llvm::llvm_unreachable_internal("unknown context kind!", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Sema/DeclSpec.h" , 2051); |
2052 | } |
2053 | |
2054 | /// Return true if the context permits a C++17 decomposition declarator. |
2055 | bool mayHaveDecompositionDeclarator() const { |
2056 | switch (Context) { |
2057 | case DeclaratorContext::FileContext: |
2058 | // FIXME: It's not clear that the proposal meant to allow file-scope |
2059 | // structured bindings, but it does. |
2060 | case DeclaratorContext::BlockContext: |
2061 | case DeclaratorContext::ForContext: |
2062 | case DeclaratorContext::InitStmtContext: |
2063 | case DeclaratorContext::ConditionContext: |
2064 | return true; |
2065 | |
2066 | case DeclaratorContext::MemberContext: |
2067 | case DeclaratorContext::PrototypeContext: |
2068 | case DeclaratorContext::TemplateParamContext: |
2069 | case DeclaratorContext::RequiresExprContext: |
2070 | // Maybe one day... |
2071 | return false; |
2072 | |
2073 | // These contexts don't allow any kind of non-abstract declarator. |
2074 | case DeclaratorContext::KNRTypeListContext: |
2075 | case DeclaratorContext::TypeNameContext: |
2076 | case DeclaratorContext::FunctionalCastContext: |
2077 | case DeclaratorContext::AliasDeclContext: |
2078 | case DeclaratorContext::AliasTemplateContext: |
2079 | case DeclaratorContext::LambdaExprParameterContext: |
2080 | case DeclaratorContext::ObjCParameterContext: |
2081 | case DeclaratorContext::ObjCResultContext: |
2082 | case DeclaratorContext::CXXNewContext: |
2083 | case DeclaratorContext::CXXCatchContext: |
2084 | case DeclaratorContext::ObjCCatchContext: |
2085 | case DeclaratorContext::BlockLiteralContext: |
2086 | case DeclaratorContext::LambdaExprContext: |
2087 | case DeclaratorContext::ConversionIdContext: |
2088 | case DeclaratorContext::TemplateArgContext: |
2089 | case DeclaratorContext::TemplateTypeArgContext: |
2090 | case DeclaratorContext::TrailingReturnContext: |
2091 | case DeclaratorContext::TrailingReturnVarContext: |
2092 | return false; |
2093 | } |
2094 | llvm_unreachable("unknown context kind!")::llvm::llvm_unreachable_internal("unknown context kind!", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Sema/DeclSpec.h" , 2094); |
2095 | } |
2096 | |
2097 | /// mayBeFollowedByCXXDirectInit - Return true if the declarator can be |
2098 | /// followed by a C++ direct initializer, e.g. "int x(1);". |
2099 | bool mayBeFollowedByCXXDirectInit() const { |
2100 | if (hasGroupingParens()) return false; |
2101 | |
2102 | if (getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef) |
2103 | return false; |
2104 | |
2105 | if (getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_extern && |
2106 | Context != DeclaratorContext::FileContext) |
2107 | return false; |
2108 | |
2109 | // Special names can't have direct initializers. |
2110 | if (Name.getKind() != UnqualifiedIdKind::IK_Identifier) |
2111 | return false; |
2112 | |
2113 | switch (Context) { |
2114 | case DeclaratorContext::FileContext: |
2115 | case DeclaratorContext::BlockContext: |
2116 | case DeclaratorContext::ForContext: |
2117 | case DeclaratorContext::InitStmtContext: |
2118 | case DeclaratorContext::TrailingReturnVarContext: |
2119 | return true; |
2120 | |
2121 | case DeclaratorContext::ConditionContext: |
2122 | // This may not be followed by a direct initializer, but it can't be a |
2123 | // function declaration either, and we'd prefer to perform a tentative |
2124 | // parse in order to produce the right diagnostic. |
2125 | return true; |
2126 | |
2127 | case DeclaratorContext::KNRTypeListContext: |
2128 | case DeclaratorContext::MemberContext: |
2129 | case DeclaratorContext::PrototypeContext: |
2130 | case DeclaratorContext::LambdaExprParameterContext: |
2131 | case DeclaratorContext::ObjCParameterContext: |
2132 | case DeclaratorContext::ObjCResultContext: |
2133 | case DeclaratorContext::TemplateParamContext: |
2134 | case DeclaratorContext::CXXCatchContext: |
2135 | case DeclaratorContext::ObjCCatchContext: |
2136 | case DeclaratorContext::TypeNameContext: |
2137 | case DeclaratorContext::FunctionalCastContext: // FIXME |
2138 | case DeclaratorContext::CXXNewContext: |
2139 | case DeclaratorContext::AliasDeclContext: |
2140 | case DeclaratorContext::AliasTemplateContext: |
2141 | case DeclaratorContext::BlockLiteralContext: |
2142 | case DeclaratorContext::LambdaExprContext: |
2143 | case DeclaratorContext::ConversionIdContext: |
2144 | case DeclaratorContext::TemplateArgContext: |
2145 | case DeclaratorContext::TemplateTypeArgContext: |
2146 | case DeclaratorContext::TrailingReturnContext: |
2147 | case DeclaratorContext::RequiresExprContext: |
2148 | return false; |
2149 | } |
2150 | llvm_unreachable("unknown context kind!")::llvm::llvm_unreachable_internal("unknown context kind!", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Sema/DeclSpec.h" , 2150); |
2151 | } |
2152 | |
2153 | /// isPastIdentifier - Return true if we have parsed beyond the point where |
2154 | /// the name would appear. (This may happen even if we haven't actually parsed |
2155 | /// a name, perhaps because this context doesn't require one.) |
2156 | bool isPastIdentifier() const { return Name.isValid(); } |
2157 | |
2158 | /// hasName - Whether this declarator has a name, which might be an |
2159 | /// identifier (accessible via getIdentifier()) or some kind of |
2160 | /// special C++ name (constructor, destructor, etc.), or a structured |
2161 | /// binding (which is not exactly a name, but occupies the same position). |
2162 | bool hasName() const { |
2163 | return Name.getKind() != UnqualifiedIdKind::IK_Identifier || |
2164 | Name.Identifier || isDecompositionDeclarator(); |
2165 | } |
2166 | |
2167 | /// Return whether this declarator is a decomposition declarator. |
2168 | bool isDecompositionDeclarator() const { |
2169 | return BindingGroup.isSet(); |
2170 | } |
2171 | |
2172 | IdentifierInfo *getIdentifier() const { |
2173 | if (Name.getKind() == UnqualifiedIdKind::IK_Identifier) |
2174 | return Name.Identifier; |
2175 | |
2176 | return nullptr; |
2177 | } |
2178 | SourceLocation getIdentifierLoc() const { return Name.StartLocation; } |
2179 | |
2180 | /// Set the name of this declarator to be the given identifier. |
2181 | void SetIdentifier(IdentifierInfo *Id, SourceLocation IdLoc) { |
2182 | Name.setIdentifier(Id, IdLoc); |
2183 | } |
2184 | |
2185 | /// Set the decomposition bindings for this declarator. |
2186 | void |
2187 | setDecompositionBindings(SourceLocation LSquareLoc, |
2188 | ArrayRef<DecompositionDeclarator::Binding> Bindings, |
2189 | SourceLocation RSquareLoc); |
2190 | |
2191 | /// AddTypeInfo - Add a chunk to this declarator. Also extend the range to |
2192 | /// EndLoc, which should be the last token of the chunk. |
2193 | /// This function takes attrs by R-Value reference because it takes ownership |
2194 | /// of those attributes from the parameter. |
2195 | void AddTypeInfo(const DeclaratorChunk &TI, ParsedAttributes &&attrs, |
2196 | SourceLocation EndLoc) { |
2197 | DeclTypeInfo.push_back(TI); |
2198 | DeclTypeInfo.back().getAttrs().addAll(attrs.begin(), attrs.end()); |
2199 | getAttributePool().takeAllFrom(attrs.getPool()); |
2200 | |
2201 | if (!EndLoc.isInvalid()) |
2202 | SetRangeEnd(EndLoc); |
2203 | } |
2204 | |
2205 | /// AddTypeInfo - Add a chunk to this declarator. Also extend the range to |
2206 | /// EndLoc, which should be the last token of the chunk. |
2207 | void AddTypeInfo(const DeclaratorChunk &TI, SourceLocation EndLoc) { |
2208 | DeclTypeInfo.push_back(TI); |
2209 | |
2210 | if (!EndLoc.isInvalid()) |
2211 | SetRangeEnd(EndLoc); |
2212 | } |
2213 | |
2214 | /// Add a new innermost chunk to this declarator. |
2215 | void AddInnermostTypeInfo(const DeclaratorChunk &TI) { |
2216 | DeclTypeInfo.insert(DeclTypeInfo.begin(), TI); |
2217 | } |
2218 | |
2219 | /// Return the number of types applied to this declarator. |
2220 | unsigned getNumTypeObjects() const { return DeclTypeInfo.size(); } |
2221 | |
2222 | /// Return the specified TypeInfo from this declarator. TypeInfo #0 is |
2223 | /// closest to the identifier. |
2224 | const DeclaratorChunk &getTypeObject(unsigned i) const { |
2225 | assert(i < DeclTypeInfo.size() && "Invalid type chunk")((i < DeclTypeInfo.size() && "Invalid type chunk") ? static_cast<void> (0) : __assert_fail ("i < DeclTypeInfo.size() && \"Invalid type chunk\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Sema/DeclSpec.h" , 2225, __PRETTY_FUNCTION__)); |
2226 | return DeclTypeInfo[i]; |
2227 | } |
2228 | DeclaratorChunk &getTypeObject(unsigned i) { |
2229 | assert(i < DeclTypeInfo.size() && "Invalid type chunk")((i < DeclTypeInfo.size() && "Invalid type chunk") ? static_cast<void> (0) : __assert_fail ("i < DeclTypeInfo.size() && \"Invalid type chunk\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Sema/DeclSpec.h" , 2229, __PRETTY_FUNCTION__)); |
2230 | return DeclTypeInfo[i]; |
2231 | } |
2232 | |
2233 | typedef SmallVectorImpl<DeclaratorChunk>::const_iterator type_object_iterator; |
2234 | typedef llvm::iterator_range<type_object_iterator> type_object_range; |
2235 | |
2236 | /// Returns the range of type objects, from the identifier outwards. |
2237 | type_object_range type_objects() const { |
2238 | return type_object_range(DeclTypeInfo.begin(), DeclTypeInfo.end()); |
2239 | } |
2240 | |
2241 | void DropFirstTypeObject() { |
2242 | assert(!DeclTypeInfo.empty() && "No type chunks to drop.")((!DeclTypeInfo.empty() && "No type chunks to drop.") ? static_cast<void> (0) : __assert_fail ("!DeclTypeInfo.empty() && \"No type chunks to drop.\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Sema/DeclSpec.h" , 2242, __PRETTY_FUNCTION__)); |
2243 | DeclTypeInfo.front().destroy(); |
2244 | DeclTypeInfo.erase(DeclTypeInfo.begin()); |
2245 | } |
2246 | |
2247 | /// Return the innermost (closest to the declarator) chunk of this |
2248 | /// declarator that is not a parens chunk, or null if there are no |
2249 | /// non-parens chunks. |
2250 | const DeclaratorChunk *getInnermostNonParenChunk() const { |
2251 | for (unsigned i = 0, i_end = DeclTypeInfo.size(); i < i_end; ++i) { |
2252 | if (!DeclTypeInfo[i].isParen()) |
2253 | return &DeclTypeInfo[i]; |
2254 | } |
2255 | return nullptr; |
2256 | } |
2257 | |
2258 | /// Return the outermost (furthest from the declarator) chunk of |
2259 | /// this declarator that is not a parens chunk, or null if there are |
2260 | /// no non-parens chunks. |
2261 | const DeclaratorChunk *getOutermostNonParenChunk() const { |
2262 | for (unsigned i = DeclTypeInfo.size(), i_end = 0; i != i_end; --i) { |
2263 | if (!DeclTypeInfo[i-1].isParen()) |
2264 | return &DeclTypeInfo[i-1]; |
2265 | } |
2266 | return nullptr; |
2267 | } |
2268 | |
2269 | /// isArrayOfUnknownBound - This method returns true if the declarator |
2270 | /// is a declarator for an array of unknown bound (looking through |
2271 | /// parentheses). |
2272 | bool isArrayOfUnknownBound() const { |
2273 | const DeclaratorChunk *chunk = getInnermostNonParenChunk(); |
2274 | return (chunk && chunk->Kind == DeclaratorChunk::Array && |
2275 | !chunk->Arr.NumElts); |
2276 | } |
2277 | |
2278 | /// isFunctionDeclarator - This method returns true if the declarator |
2279 | /// is a function declarator (looking through parentheses). |
2280 | /// If true is returned, then the reference type parameter idx is |
2281 | /// assigned with the index of the declaration chunk. |
2282 | bool isFunctionDeclarator(unsigned& idx) const { |
2283 | for (unsigned i = 0, i_end = DeclTypeInfo.size(); i < i_end; ++i) { |
2284 | switch (DeclTypeInfo[i].Kind) { |
2285 | case DeclaratorChunk::Function: |
2286 | idx = i; |
2287 | return true; |
2288 | case DeclaratorChunk::Paren: |
2289 | continue; |
2290 | case DeclaratorChunk::Pointer: |
2291 | case DeclaratorChunk::Reference: |
2292 | case DeclaratorChunk::Array: |
2293 | case DeclaratorChunk::BlockPointer: |
2294 | case DeclaratorChunk::MemberPointer: |
2295 | case DeclaratorChunk::Pipe: |
2296 | return false; |
2297 | } |
2298 | llvm_unreachable("Invalid type chunk")::llvm::llvm_unreachable_internal("Invalid type chunk", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Sema/DeclSpec.h" , 2298); |
2299 | } |
2300 | return false; |
2301 | } |
2302 | |
2303 | /// isFunctionDeclarator - Once this declarator is fully parsed and formed, |
2304 | /// this method returns true if the identifier is a function declarator |
2305 | /// (looking through parentheses). |
2306 | bool isFunctionDeclarator() const { |
2307 | unsigned index; |
2308 | return isFunctionDeclarator(index); |
2309 | } |
2310 | |
2311 | /// getFunctionTypeInfo - Retrieves the function type info object |
2312 | /// (looking through parentheses). |
2313 | DeclaratorChunk::FunctionTypeInfo &getFunctionTypeInfo() { |
2314 | assert(isFunctionDeclarator() && "Not a function declarator!")((isFunctionDeclarator() && "Not a function declarator!" ) ? static_cast<void> (0) : __assert_fail ("isFunctionDeclarator() && \"Not a function declarator!\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Sema/DeclSpec.h" , 2314, __PRETTY_FUNCTION__)); |
2315 | unsigned index = 0; |
2316 | isFunctionDeclarator(index); |
2317 | return DeclTypeInfo[index].Fun; |
2318 | } |
2319 | |
2320 | /// getFunctionTypeInfo - Retrieves the function type info object |
2321 | /// (looking through parentheses). |
2322 | const DeclaratorChunk::FunctionTypeInfo &getFunctionTypeInfo() const { |
2323 | return const_cast<Declarator*>(this)->getFunctionTypeInfo(); |
2324 | } |
2325 | |
2326 | /// Determine whether the declaration that will be produced from |
2327 | /// this declaration will be a function. |
2328 | /// |
2329 | /// A declaration can declare a function even if the declarator itself |
2330 | /// isn't a function declarator, if the type specifier refers to a function |
2331 | /// type. This routine checks for both cases. |
2332 | bool isDeclarationOfFunction() const; |
2333 | |
2334 | /// Return true if this declaration appears in a context where a |
2335 | /// function declarator would be a function declaration. |
2336 | bool isFunctionDeclarationContext() const { |
2337 | if (getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef) |
2338 | return false; |
2339 | |
2340 | switch (Context) { |
2341 | case DeclaratorContext::FileContext: |
2342 | case DeclaratorContext::MemberContext: |
2343 | case DeclaratorContext::BlockContext: |
2344 | case DeclaratorContext::ForContext: |
2345 | case DeclaratorContext::InitStmtContext: |
2346 | return true; |
2347 | |
2348 | case DeclaratorContext::ConditionContext: |
2349 | case DeclaratorContext::KNRTypeListContext: |
2350 | case DeclaratorContext::TypeNameContext: |
2351 | case DeclaratorContext::FunctionalCastContext: |
2352 | case DeclaratorContext::AliasDeclContext: |
2353 | case DeclaratorContext::AliasTemplateContext: |
2354 | case DeclaratorContext::PrototypeContext: |
2355 | case DeclaratorContext::LambdaExprParameterContext: |
2356 | case DeclaratorContext::ObjCParameterContext: |
2357 | case DeclaratorContext::ObjCResultContext: |
2358 | case DeclaratorContext::TemplateParamContext: |
2359 | case DeclaratorContext::CXXNewContext: |
2360 | case DeclaratorContext::CXXCatchContext: |
2361 | case DeclaratorContext::ObjCCatchContext: |
2362 | case DeclaratorContext::BlockLiteralContext: |
2363 | case DeclaratorContext::LambdaExprContext: |
2364 | case DeclaratorContext::ConversionIdContext: |
2365 | case DeclaratorContext::TemplateArgContext: |
2366 | case DeclaratorContext::TemplateTypeArgContext: |
2367 | case DeclaratorContext::TrailingReturnContext: |
2368 | case DeclaratorContext::TrailingReturnVarContext: |
2369 | case DeclaratorContext::RequiresExprContext: |
2370 | return false; |
2371 | } |
2372 | llvm_unreachable("unknown context kind!")::llvm::llvm_unreachable_internal("unknown context kind!", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Sema/DeclSpec.h" , 2372); |
2373 | } |
2374 | |
2375 | /// Determine whether this declaration appears in a context where an |
2376 | /// expression could appear. |
2377 | bool isExpressionContext() const { |
2378 | switch (Context) { |
2379 | case DeclaratorContext::FileContext: |
2380 | case DeclaratorContext::KNRTypeListContext: |
2381 | case DeclaratorContext::MemberContext: |
2382 | |
2383 | // FIXME: sizeof(...) permits an expression. |
2384 | case DeclaratorContext::TypeNameContext: |
2385 | |
2386 | case DeclaratorContext::FunctionalCastContext: |
2387 | case DeclaratorContext::AliasDeclContext: |
2388 | case DeclaratorContext::AliasTemplateContext: |
2389 | case DeclaratorContext::PrototypeContext: |
2390 | case DeclaratorContext::LambdaExprParameterContext: |
2391 | case DeclaratorContext::ObjCParameterContext: |
2392 | case DeclaratorContext::ObjCResultContext: |
2393 | case DeclaratorContext::TemplateParamContext: |
2394 | case DeclaratorContext::CXXNewContext: |
2395 | case DeclaratorContext::CXXCatchContext: |
2396 | case DeclaratorContext::ObjCCatchContext: |
2397 | case DeclaratorContext::BlockLiteralContext: |
2398 | case DeclaratorContext::LambdaExprContext: |
2399 | case DeclaratorContext::ConversionIdContext: |
2400 | case DeclaratorContext::TrailingReturnContext: |
2401 | case DeclaratorContext::TrailingReturnVarContext: |
2402 | case DeclaratorContext::TemplateTypeArgContext: |
2403 | case DeclaratorContext::RequiresExprContext: |
2404 | return false; |
2405 | |
2406 | case DeclaratorContext::BlockContext: |
2407 | case DeclaratorContext::ForContext: |
2408 | case DeclaratorContext::InitStmtContext: |
2409 | case DeclaratorContext::ConditionContext: |
2410 | case DeclaratorContext::TemplateArgContext: |
2411 | return true; |
2412 | } |
2413 | |
2414 | llvm_unreachable("unknown context kind!")::llvm::llvm_unreachable_internal("unknown context kind!", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Sema/DeclSpec.h" , 2414); |
2415 | } |
2416 | |
2417 | /// Return true if a function declarator at this position would be a |
2418 | /// function declaration. |
2419 | bool isFunctionDeclaratorAFunctionDeclaration() const { |
2420 | if (!isFunctionDeclarationContext()) |
2421 | return false; |
2422 | |
2423 | for (unsigned I = 0, N = getNumTypeObjects(); I != N; ++I) |
2424 | if (getTypeObject(I).Kind != DeclaratorChunk::Paren) |
2425 | return false; |
2426 | |
2427 | return true; |
2428 | } |
2429 | |
2430 | /// Determine whether a trailing return type was written (at any |
2431 | /// level) within this declarator. |
2432 | bool hasTrailingReturnType() const { |
2433 | for (const auto &Chunk : type_objects()) |
2434 | if (Chunk.Kind == DeclaratorChunk::Function && |
2435 | Chunk.Fun.hasTrailingReturnType()) |
2436 | return true; |
2437 | return false; |
2438 | } |
2439 | |
2440 | /// \brief Sets a trailing requires clause for this declarator. |
2441 | void setTrailingRequiresClause(Expr *TRC) { |
2442 | TrailingRequiresClause = TRC; |
2443 | } |
2444 | |
2445 | /// \brief Sets a trailing requires clause for this declarator. |
2446 | Expr *getTrailingRequiresClause() { |
2447 | return TrailingRequiresClause; |
2448 | } |
2449 | |
2450 | /// \brief Determine whether a trailing requires clause was written in this |
2451 | /// declarator. |
2452 | bool hasTrailingRequiresClause() const { |
2453 | return TrailingRequiresClause != nullptr; |
2454 | } |
2455 | |
2456 | /// Sets the template parameter lists that preceded the declarator. |
2457 | void setTemplateParameterLists(ArrayRef<TemplateParameterList *> TPLs) { |
2458 | TemplateParameterLists = TPLs; |
2459 | } |
2460 | |
2461 | /// The template parameter lists that preceded the declarator. |
2462 | ArrayRef<TemplateParameterList *> getTemplateParameterLists() const { |
2463 | return TemplateParameterLists; |
2464 | } |
2465 | |
2466 | /// Sets the template parameter list generated from the explicit template |
2467 | /// parameters along with any invented template parameters from |
2468 | /// placeholder-typed parameters. |
2469 | void setInventedTemplateParameterList(TemplateParameterList *Invented) { |
2470 | InventedTemplateParameterList = Invented; |
2471 | } |
2472 | |
2473 | /// The template parameter list generated from the explicit template |
2474 | /// parameters along with any invented template parameters from |
2475 | /// placeholder-typed parameters, if there were any such parameters. |
2476 | TemplateParameterList * getInventedTemplateParameterList() const { |
2477 | return InventedTemplateParameterList; |
2478 | } |
2479 | |
2480 | /// takeAttributes - Takes attributes from the given parsed-attributes |
2481 | /// set and add them to this declarator. |
2482 | /// |
2483 | /// These examples both add 3 attributes to "var": |
2484 | /// short int var __attribute__((aligned(16),common,deprecated)); |
2485 | /// short int x, __attribute__((aligned(16)) var |
2486 | /// __attribute__((common,deprecated)); |
2487 | /// |
2488 | /// Also extends the range of the declarator. |
2489 | void takeAttributes(ParsedAttributes &attrs, SourceLocation lastLoc) { |
2490 | Attrs.takeAllFrom(attrs); |
2491 | |
2492 | if (!lastLoc.isInvalid()) |
2493 | SetRangeEnd(lastLoc); |
2494 | } |
2495 | |
2496 | const ParsedAttributes &getAttributes() const { return Attrs; } |
2497 | ParsedAttributes &getAttributes() { return Attrs; } |
2498 | |
2499 | /// hasAttributes - do we contain any attributes? |
2500 | bool hasAttributes() const { |
2501 | if (!getAttributes().empty() || getDeclSpec().hasAttributes()) |
2502 | return true; |
2503 | for (unsigned i = 0, e = getNumTypeObjects(); i != e; ++i) |
2504 | if (!getTypeObject(i).getAttrs().empty()) |
2505 | return true; |
2506 | return false; |
2507 | } |
2508 | |
2509 | /// Return a source range list of C++11 attributes associated |
2510 | /// with the declarator. |
2511 | void getCXX11AttributeRanges(SmallVectorImpl<SourceRange> &Ranges) { |
2512 | for (const ParsedAttr &AL : Attrs) |
2513 | if (AL.isCXX11Attribute()) |
2514 | Ranges.push_back(AL.getRange()); |
2515 | } |
2516 | |
2517 | void setAsmLabel(Expr *E) { AsmLabel = E; } |
2518 | Expr *getAsmLabel() const { return AsmLabel; } |
2519 | |
2520 | void setExtension(bool Val = true) { Extension = Val; } |
2521 | bool getExtension() const { return Extension; } |
2522 | |
2523 | void setObjCIvar(bool Val = true) { ObjCIvar = Val; } |
2524 | bool isObjCIvar() const { return ObjCIvar; } |
2525 | |
2526 | void setObjCWeakProperty(bool Val = true) { ObjCWeakProperty = Val; } |
2527 | bool isObjCWeakProperty() const { return ObjCWeakProperty; } |
2528 | |
2529 | void setInvalidType(bool Val = true) { InvalidType = Val; } |
2530 | bool isInvalidType() const { |
2531 | return InvalidType || DS.getTypeSpecType() == DeclSpec::TST_error; |
2532 | } |
2533 | |
2534 | void setGroupingParens(bool flag) { GroupingParens = flag; } |
2535 | bool hasGroupingParens() const { return GroupingParens; } |
2536 | |
2537 | bool isFirstDeclarator() const { return !CommaLoc.isValid(); } |
2538 | SourceLocation getCommaLoc() const { return CommaLoc; } |
2539 | void setCommaLoc(SourceLocation CL) { CommaLoc = CL; } |
2540 | |
2541 | bool hasEllipsis() const { return EllipsisLoc.isValid(); } |
2542 | SourceLocation getEllipsisLoc() const { return EllipsisLoc; } |
2543 | void setEllipsisLoc(SourceLocation EL) { EllipsisLoc = EL; } |
2544 | |
2545 | void setFunctionDefinitionKind(FunctionDefinitionKind Val) { |
2546 | FunctionDefinition = Val; |
2547 | } |
2548 | |
2549 | bool isFunctionDefinition() const { |
2550 | return getFunctionDefinitionKind() != FDK_Declaration; |
2551 | } |
2552 | |
2553 | FunctionDefinitionKind getFunctionDefinitionKind() const { |
2554 | return (FunctionDefinitionKind)FunctionDefinition; |
2555 | } |
2556 | |
2557 | /// Returns true if this declares a real member and not a friend. |
2558 | bool isFirstDeclarationOfMember() { |
2559 | return getContext() == DeclaratorContext::MemberContext && |
2560 | !getDeclSpec().isFriendSpecified(); |
2561 | } |
2562 | |
2563 | /// Returns true if this declares a static member. This cannot be called on a |
2564 | /// declarator outside of a MemberContext because we won't know until |
2565 | /// redeclaration time if the decl is static. |
2566 | bool isStaticMember(); |
2567 | |
2568 | /// Returns true if this declares a constructor or a destructor. |
2569 | bool isCtorOrDtor(); |
2570 | |
2571 | void setRedeclaration(bool Val) { Redeclaration = Val; } |
2572 | bool isRedeclaration() const { return Redeclaration; } |
2573 | }; |
2574 | |
2575 | /// This little struct is used to capture information about |
2576 | /// structure field declarators, which is basically just a bitfield size. |
2577 | struct FieldDeclarator { |
2578 | Declarator D; |
2579 | Expr *BitfieldSize; |
2580 | explicit FieldDeclarator(const DeclSpec &DS) |
2581 | : D(DS, DeclaratorContext::MemberContext), |
2582 | BitfieldSize(nullptr) {} |
2583 | }; |
2584 | |
2585 | /// Represents a C++11 virt-specifier-seq. |
2586 | class VirtSpecifiers { |
2587 | public: |
2588 | enum Specifier { |
2589 | VS_None = 0, |
2590 | VS_Override = 1, |
2591 | VS_Final = 2, |
2592 | VS_Sealed = 4, |
2593 | // Represents the __final keyword, which is legal for gcc in pre-C++11 mode. |
2594 | VS_GNU_Final = 8 |
2595 | }; |
2596 | |
2597 | VirtSpecifiers() : Specifiers(0), LastSpecifier(VS_None) { } |
2598 | |
2599 | bool SetSpecifier(Specifier VS, SourceLocation Loc, |
2600 | const char *&PrevSpec); |
2601 | |
2602 | bool isUnset() const { return Specifiers == 0; } |
2603 | |
2604 | bool isOverrideSpecified() const { return Specifiers & VS_Override; } |
2605 | SourceLocation getOverrideLoc() const { return VS_overrideLoc; } |
2606 | |
2607 | bool isFinalSpecified() const { return Specifiers & (VS_Final | VS_Sealed | VS_GNU_Final); } |
2608 | bool isFinalSpelledSealed() const { return Specifiers & VS_Sealed; } |
2609 | SourceLocation getFinalLoc() const { return VS_finalLoc; } |
2610 | |
2611 | void clear() { Specifiers = 0; } |
2612 | |
2613 | static const char *getSpecifierName(Specifier VS); |
2614 | |
2615 | SourceLocation getFirstLocation() const { return FirstLocation; } |
2616 | SourceLocation getLastLocation() const { return LastLocation; } |
2617 | Specifier getLastSpecifier() const { return LastSpecifier; } |
2618 | |
2619 | private: |
2620 | unsigned Specifiers; |
2621 | Specifier LastSpecifier; |
2622 | |
2623 | SourceLocation VS_overrideLoc, VS_finalLoc; |
2624 | SourceLocation FirstLocation; |
2625 | SourceLocation LastLocation; |
2626 | }; |
2627 | |
2628 | enum class LambdaCaptureInitKind { |
2629 | NoInit, //!< [a] |
2630 | CopyInit, //!< [a = b], [a = {b}] |
2631 | DirectInit, //!< [a(b)] |
2632 | ListInit //!< [a{b}] |
2633 | }; |
2634 | |
2635 | /// Represents a complete lambda introducer. |
2636 | struct LambdaIntroducer { |
2637 | /// An individual capture in a lambda introducer. |
2638 | struct LambdaCapture { |
2639 | LambdaCaptureKind Kind; |
2640 | SourceLocation Loc; |
2641 | IdentifierInfo *Id; |
2642 | SourceLocation EllipsisLoc; |
2643 | LambdaCaptureInitKind InitKind; |
2644 | ExprResult Init; |
2645 | ParsedType InitCaptureType; |
2646 | SourceRange ExplicitRange; |
2647 | |
2648 | LambdaCapture(LambdaCaptureKind Kind, SourceLocation Loc, |
2649 | IdentifierInfo *Id, SourceLocation EllipsisLoc, |
2650 | LambdaCaptureInitKind InitKind, ExprResult Init, |
2651 | ParsedType InitCaptureType, |
2652 | SourceRange ExplicitRange) |
2653 | : Kind(Kind), Loc(Loc), Id(Id), EllipsisLoc(EllipsisLoc), |
2654 | InitKind(InitKind), Init(Init), InitCaptureType(InitCaptureType), |
2655 | ExplicitRange(ExplicitRange) {} |
2656 | }; |
2657 | |
2658 | SourceRange Range; |
2659 | SourceLocation DefaultLoc; |
2660 | LambdaCaptureDefault Default; |
2661 | SmallVector<LambdaCapture, 4> Captures; |
2662 | |
2663 | LambdaIntroducer() |
2664 | : Default(LCD_None) {} |
2665 | |
2666 | /// Append a capture in a lambda introducer. |
2667 | void addCapture(LambdaCaptureKind Kind, |
2668 | SourceLocation Loc, |
2669 | IdentifierInfo* Id, |
2670 | SourceLocation EllipsisLoc, |
2671 | LambdaCaptureInitKind InitKind, |
2672 | ExprResult Init, |
2673 | ParsedType InitCaptureType, |
2674 | SourceRange ExplicitRange) { |
2675 | Captures.push_back(LambdaCapture(Kind, Loc, Id, EllipsisLoc, InitKind, Init, |
2676 | InitCaptureType, ExplicitRange)); |
2677 | } |
2678 | }; |
2679 | |
2680 | struct InventedTemplateParameterInfo { |
2681 | /// The number of parameters in the template parameter list that were |
2682 | /// explicitly specified by the user, as opposed to being invented by use |
2683 | /// of an auto parameter. |
2684 | unsigned NumExplicitTemplateParams = 0; |
2685 | |
2686 | /// If this is a generic lambda or abbreviated function template, use this |
2687 | /// as the depth of each 'auto' parameter, during initial AST construction. |
2688 | unsigned AutoTemplateParameterDepth = 0; |
2689 | |
2690 | /// Store the list of the template parameters for a generic lambda or an |
2691 | /// abbreviated function template. |
2692 | /// If this is a generic lambda or abbreviated function template, this holds |
2693 | /// the explicit template parameters followed by the auto parameters |
2694 | /// converted into TemplateTypeParmDecls. |
2695 | /// It can be used to construct the generic lambda or abbreviated template's |
2696 | /// template parameter list during initial AST construction. |
2697 | SmallVector<NamedDecl*, 4> TemplateParams; |
2698 | }; |
2699 | |
2700 | } // end namespace clang |
2701 | |
2702 | #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 "llvm/Support/PointerLikeTypeTraits.h" |
20 | #include <cassert> |
21 | #include <cstdint> |
22 | #include <string> |
23 | #include <utility> |
24 | |
25 | namespace llvm { |
26 | |
27 | template <typename T> struct DenseMapInfo; |
28 | |
29 | } // namespace llvm |
30 | |
31 | namespace clang { |
32 | |
33 | class SourceManager; |
34 | |
35 | /// An opaque identifier used by SourceManager which refers to a |
36 | /// source file (MemoryBuffer) along with its \#include path and \#line data. |
37 | /// |
38 | class FileID { |
39 | /// A mostly-opaque identifier, where 0 is "invalid", >0 is |
40 | /// this module, and <-1 is something loaded from another module. |
41 | int ID = 0; |
42 | |
43 | public: |
44 | bool isValid() const { return ID != 0; } |
45 | bool isInvalid() const { return ID == 0; } |
46 | |
47 | bool operator==(const FileID &RHS) const { return ID == RHS.ID; } |
48 | bool operator<(const FileID &RHS) const { return ID < RHS.ID; } |
49 | bool operator<=(const FileID &RHS) const { return ID <= RHS.ID; } |
50 | bool operator!=(const FileID &RHS) const { return !(*this == RHS); } |
51 | bool operator>(const FileID &RHS) const { return RHS < *this; } |
52 | bool operator>=(const FileID &RHS) const { return RHS <= *this; } |
53 | |
54 | static FileID getSentinel() { return get(-1); } |
55 | unsigned getHashValue() const { return static_cast<unsigned>(ID); } |
56 | |
57 | private: |
58 | friend class ASTWriter; |
59 | friend class ASTReader; |
60 | friend class SourceManager; |
61 | |
62 | static FileID get(int V) { |
63 | FileID F; |
64 | F.ID = V; |
65 | return F; |
66 | } |
67 | |
68 | int getOpaqueValue() const { return ID; } |
69 | }; |
70 | |
71 | /// Encodes a location in the source. The SourceManager can decode this |
72 | /// to get at the full include stack, line and column information. |
73 | /// |
74 | /// Technically, a source location is simply an offset into the manager's view |
75 | /// of the input source, which is all input buffers (including macro |
76 | /// expansions) concatenated in an effectively arbitrary order. The manager |
77 | /// actually maintains two blocks of input buffers. One, starting at offset |
78 | /// 0 and growing upwards, contains all buffers from this module. The other, |
79 | /// starting at the highest possible offset and growing downwards, contains |
80 | /// buffers of loaded modules. |
81 | /// |
82 | /// In addition, one bit of SourceLocation is used for quick access to the |
83 | /// information whether the location is in a file or a macro expansion. |
84 | /// |
85 | /// It is important that this type remains small. It is currently 32 bits wide. |
86 | class SourceLocation { |
87 | friend class ASTReader; |
88 | friend class ASTWriter; |
89 | friend class SourceManager; |
90 | |
91 | unsigned ID = 0; |
92 | |
93 | enum : unsigned { |
94 | MacroIDBit = 1U << 31 |
95 | }; |
96 | |
97 | public: |
98 | bool isFileID() const { return (ID & MacroIDBit) == 0; } |
99 | bool isMacroID() const { return (ID & MacroIDBit) != 0; } |
100 | |
101 | /// Return true if this is a valid SourceLocation object. |
102 | /// |
103 | /// Invalid SourceLocations are often used when events have no corresponding |
104 | /// location in the source (e.g. a diagnostic is required for a command line |
105 | /// option). |
106 | bool isValid() const { return ID != 0; } |
107 | bool isInvalid() const { return ID == 0; } |
108 | |
109 | private: |
110 | /// Return the offset into the manager's global input view. |
111 | unsigned getOffset() const { |
112 | return ID & ~MacroIDBit; |
113 | } |
114 | |
115 | static SourceLocation getFileLoc(unsigned ID) { |
116 | assert((ID & MacroIDBit) == 0 && "Ran out of source locations!")(((ID & MacroIDBit) == 0 && "Ran out of source locations!" ) ? static_cast<void> (0) : __assert_fail ("(ID & MacroIDBit) == 0 && \"Ran out of source locations!\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Basic/SourceLocation.h" , 116, __PRETTY_FUNCTION__)); |
117 | SourceLocation L; |
118 | L.ID = ID; |
119 | return L; |
120 | } |
121 | |
122 | static SourceLocation getMacroLoc(unsigned ID) { |
123 | assert((ID & MacroIDBit) == 0 && "Ran out of source locations!")(((ID & MacroIDBit) == 0 && "Ran out of source locations!" ) ? static_cast<void> (0) : __assert_fail ("(ID & MacroIDBit) == 0 && \"Ran out of source locations!\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Basic/SourceLocation.h" , 123, __PRETTY_FUNCTION__)); |
124 | SourceLocation L; |
125 | L.ID = MacroIDBit | ID; |
126 | return L; |
127 | } |
128 | |
129 | public: |
130 | /// Return a source location with the specified offset from this |
131 | /// SourceLocation. |
132 | SourceLocation getLocWithOffset(int Offset) const { |
133 | assert(((getOffset()+Offset) & MacroIDBit) == 0 && "offset overflow")((((getOffset()+Offset) & MacroIDBit) == 0 && "offset overflow" ) ? static_cast<void> (0) : __assert_fail ("((getOffset()+Offset) & MacroIDBit) == 0 && \"offset overflow\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Basic/SourceLocation.h" , 133, __PRETTY_FUNCTION__)); |
134 | SourceLocation L; |
135 | L.ID = ID+Offset; |
136 | return L; |
137 | } |
138 | |
139 | /// When a SourceLocation itself cannot be used, this returns |
140 | /// an (opaque) 32-bit integer encoding for it. |
141 | /// |
142 | /// This should only be passed to SourceLocation::getFromRawEncoding, it |
143 | /// should not be inspected directly. |
144 | unsigned getRawEncoding() const { return ID; } |
145 | |
146 | /// Turn a raw encoding of a SourceLocation object into |
147 | /// a real SourceLocation. |
148 | /// |
149 | /// \see getRawEncoding. |
150 | static SourceLocation getFromRawEncoding(unsigned Encoding) { |
151 | SourceLocation X; |
152 | X.ID = Encoding; |
153 | return X; |
154 | } |
155 | |
156 | /// When a SourceLocation itself cannot be used, this returns |
157 | /// an (opaque) pointer encoding for it. |
158 | /// |
159 | /// This should only be passed to SourceLocation::getFromPtrEncoding, it |
160 | /// should not be inspected directly. |
161 | void* getPtrEncoding() const { |
162 | // Double cast to avoid a warning "cast to pointer from integer of different |
163 | // size". |
164 | return (void*)(uintptr_t)getRawEncoding(); |
165 | } |
166 | |
167 | /// Turn a pointer encoding of a SourceLocation object back |
168 | /// into a real SourceLocation. |
169 | static SourceLocation getFromPtrEncoding(const void *Encoding) { |
170 | return getFromRawEncoding((unsigned)(uintptr_t)Encoding); |
171 | } |
172 | |
173 | static bool isPairOfFileLocations(SourceLocation Start, SourceLocation End) { |
174 | return Start.isValid() && Start.isFileID() && End.isValid() && |
175 | End.isFileID(); |
176 | } |
177 | |
178 | void print(raw_ostream &OS, const SourceManager &SM) const; |
179 | std::string printToString(const SourceManager &SM) const; |
180 | void dump(const SourceManager &SM) const; |
181 | }; |
182 | |
183 | inline bool operator==(const SourceLocation &LHS, const SourceLocation &RHS) { |
184 | return LHS.getRawEncoding() == RHS.getRawEncoding(); |
185 | } |
186 | |
187 | inline bool operator!=(const SourceLocation &LHS, const SourceLocation &RHS) { |
188 | return !(LHS == RHS); |
189 | } |
190 | |
191 | // Ordering is meaningful only if LHS and RHS have the same FileID! |
192 | // Otherwise use SourceManager::isBeforeInTranslationUnit(). |
193 | inline bool operator<(const SourceLocation &LHS, const SourceLocation &RHS) { |
194 | return LHS.getRawEncoding() < RHS.getRawEncoding(); |
195 | } |
196 | inline bool operator>(const SourceLocation &LHS, const SourceLocation &RHS) { |
197 | return LHS.getRawEncoding() > RHS.getRawEncoding(); |
198 | } |
199 | inline bool operator<=(const SourceLocation &LHS, const SourceLocation &RHS) { |
200 | return LHS.getRawEncoding() <= RHS.getRawEncoding(); |
201 | } |
202 | inline bool operator>=(const SourceLocation &LHS, const SourceLocation &RHS) { |
203 | return LHS.getRawEncoding() >= RHS.getRawEncoding(); |
204 | } |
205 | |
206 | /// A trivial tuple used to represent a source range. |
207 | class SourceRange { |
208 | SourceLocation B; |
209 | SourceLocation E; |
210 | |
211 | public: |
212 | SourceRange() = default; |
213 | SourceRange(SourceLocation loc) : B(loc), E(loc) {} |
214 | SourceRange(SourceLocation begin, SourceLocation end) : B(begin), E(end) {} |
215 | |
216 | SourceLocation getBegin() const { return B; } |
217 | SourceLocation getEnd() const { return E; } |
218 | |
219 | void setBegin(SourceLocation b) { B = b; } |
220 | void setEnd(SourceLocation e) { E = e; } |
221 | |
222 | bool isValid() const { return B.isValid() && E.isValid(); } |
223 | bool isInvalid() const { return !isValid(); } |
224 | |
225 | bool operator==(const SourceRange &X) const { |
226 | return B == X.B && E == X.E; |
227 | } |
228 | |
229 | bool operator!=(const SourceRange &X) const { |
230 | return B != X.B || E != X.E; |
231 | } |
232 | |
233 | // Returns true iff other is wholly contained within this range. |
234 | bool fullyContains(const SourceRange &other) const { |
235 | return B <= other.B && E >= other.E; |
236 | } |
237 | |
238 | void print(raw_ostream &OS, const SourceManager &SM) const; |
239 | std::string printToString(const SourceManager &SM) const; |
240 | void dump(const SourceManager &SM) const; |
241 | }; |
242 | |
243 | /// Represents a character-granular source range. |
244 | /// |
245 | /// The underlying SourceRange can either specify the starting/ending character |
246 | /// of the range, or it can specify the start of the range and the start of the |
247 | /// last token of the range (a "token range"). In the token range case, the |
248 | /// size of the last token must be measured to determine the actual end of the |
249 | /// range. |
250 | class CharSourceRange { |
251 | SourceRange Range; |
252 | bool IsTokenRange = false; |
253 | |
254 | public: |
255 | CharSourceRange() = default; |
256 | CharSourceRange(SourceRange R, bool ITR) : Range(R), IsTokenRange(ITR) {} |
257 | |
258 | static CharSourceRange getTokenRange(SourceRange R) { |
259 | return CharSourceRange(R, true); |
260 | } |
261 | |
262 | static CharSourceRange getCharRange(SourceRange R) { |
263 | return CharSourceRange(R, false); |
264 | } |
265 | |
266 | static CharSourceRange getTokenRange(SourceLocation B, SourceLocation E) { |
267 | return getTokenRange(SourceRange(B, E)); |
268 | } |
269 | |
270 | static CharSourceRange getCharRange(SourceLocation B, SourceLocation E) { |
271 | return getCharRange(SourceRange(B, E)); |
272 | } |
273 | |
274 | /// Return true if the end of this range specifies the start of |
275 | /// the last token. Return false if the end of this range specifies the last |
276 | /// character in the range. |
277 | bool isTokenRange() const { return IsTokenRange; } |
278 | bool isCharRange() const { return !IsTokenRange; } |
279 | |
280 | SourceLocation getBegin() const { return Range.getBegin(); } |
281 | SourceLocation getEnd() const { return Range.getEnd(); } |
282 | SourceRange getAsRange() const { return Range; } |
283 | |
284 | void setBegin(SourceLocation b) { Range.setBegin(b); } |
285 | void setEnd(SourceLocation e) { Range.setEnd(e); } |
286 | void setTokenRange(bool TR) { IsTokenRange = TR; } |
287 | |
288 | bool isValid() const { return Range.isValid(); } |
289 | bool isInvalid() const { return !isValid(); } |
290 | }; |
291 | |
292 | /// Represents an unpacked "presumed" location which can be presented |
293 | /// to the user. |
294 | /// |
295 | /// A 'presumed' location can be modified by \#line and GNU line marker |
296 | /// directives and is always the expansion point of a normal location. |
297 | /// |
298 | /// You can get a PresumedLoc from a SourceLocation with SourceManager. |
299 | class PresumedLoc { |
300 | const char *Filename = nullptr; |
301 | FileID ID; |
302 | unsigned Line, Col; |
303 | SourceLocation IncludeLoc; |
304 | |
305 | public: |
306 | PresumedLoc() = default; |
307 | PresumedLoc(const char *FN, FileID FID, unsigned Ln, unsigned Co, |
308 | SourceLocation IL) |
309 | : Filename(FN), ID(FID), Line(Ln), Col(Co), IncludeLoc(IL) {} |
310 | |
311 | /// Return true if this object is invalid or uninitialized. |
312 | /// |
313 | /// This occurs when created with invalid source locations or when walking |
314 | /// off the top of a \#include stack. |
315 | bool isInvalid() const { return Filename == nullptr; } |
316 | bool isValid() const { return Filename != nullptr; } |
317 | |
318 | /// Return the presumed filename of this location. |
319 | /// |
320 | /// This can be affected by \#line etc. |
321 | const char *getFilename() const { |
322 | assert(isValid())((isValid()) ? static_cast<void> (0) : __assert_fail ("isValid()" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Basic/SourceLocation.h" , 322, __PRETTY_FUNCTION__)); |
323 | return Filename; |
324 | } |
325 | |
326 | FileID getFileID() const { |
327 | assert(isValid())((isValid()) ? static_cast<void> (0) : __assert_fail ("isValid()" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Basic/SourceLocation.h" , 327, __PRETTY_FUNCTION__)); |
328 | return ID; |
329 | } |
330 | |
331 | /// Return the presumed line number of this location. |
332 | /// |
333 | /// This can be affected by \#line etc. |
334 | unsigned getLine() const { |
335 | assert(isValid())((isValid()) ? static_cast<void> (0) : __assert_fail ("isValid()" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Basic/SourceLocation.h" , 335, __PRETTY_FUNCTION__)); |
336 | return Line; |
337 | } |
338 | |
339 | /// Return the presumed column number of this location. |
340 | /// |
341 | /// This cannot be affected by \#line, but is packaged here for convenience. |
342 | unsigned getColumn() const { |
343 | assert(isValid())((isValid()) ? static_cast<void> (0) : __assert_fail ("isValid()" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Basic/SourceLocation.h" , 343, __PRETTY_FUNCTION__)); |
344 | return Col; |
345 | } |
346 | |
347 | /// Return the presumed include location of this location. |
348 | /// |
349 | /// This can be affected by GNU linemarker directives. |
350 | SourceLocation getIncludeLoc() const { |
351 | assert(isValid())((isValid()) ? static_cast<void> (0) : __assert_fail ("isValid()" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Basic/SourceLocation.h" , 351, __PRETTY_FUNCTION__)); |
352 | return IncludeLoc; |
353 | } |
354 | }; |
355 | |
356 | class FileEntry; |
357 | |
358 | /// A SourceLocation and its associated SourceManager. |
359 | /// |
360 | /// This is useful for argument passing to functions that expect both objects. |
361 | class FullSourceLoc : public SourceLocation { |
362 | const SourceManager *SrcMgr = nullptr; |
363 | |
364 | public: |
365 | /// Creates a FullSourceLoc where isValid() returns \c false. |
366 | FullSourceLoc() = default; |
367 | |
368 | explicit FullSourceLoc(SourceLocation Loc, const SourceManager &SM) |
369 | : SourceLocation(Loc), SrcMgr(&SM) {} |
370 | |
371 | bool hasManager() const { |
372 | bool hasSrcMgr = SrcMgr != nullptr; |
373 | assert(hasSrcMgr == isValid() && "FullSourceLoc has location but no manager")((hasSrcMgr == isValid() && "FullSourceLoc has location but no manager" ) ? static_cast<void> (0) : __assert_fail ("hasSrcMgr == isValid() && \"FullSourceLoc has location but no manager\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Basic/SourceLocation.h" , 373, __PRETTY_FUNCTION__)); |
374 | return hasSrcMgr; |
375 | } |
376 | |
377 | /// \pre This FullSourceLoc has an associated SourceManager. |
378 | const SourceManager &getManager() const { |
379 | assert(SrcMgr && "SourceManager is NULL.")((SrcMgr && "SourceManager is NULL.") ? static_cast< void> (0) : __assert_fail ("SrcMgr && \"SourceManager is NULL.\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Basic/SourceLocation.h" , 379, __PRETTY_FUNCTION__)); |
380 | return *SrcMgr; |
381 | } |
382 | |
383 | FileID getFileID() const; |
384 | |
385 | FullSourceLoc getExpansionLoc() const; |
386 | FullSourceLoc getSpellingLoc() const; |
387 | FullSourceLoc getFileLoc() const; |
388 | PresumedLoc getPresumedLoc(bool UseLineDirectives = true) const; |
389 | bool isMacroArgExpansion(FullSourceLoc *StartLoc = nullptr) const; |
390 | FullSourceLoc getImmediateMacroCallerLoc() const; |
391 | std::pair<FullSourceLoc, StringRef> getModuleImportLoc() const; |
392 | unsigned getFileOffset() const; |
393 | |
394 | unsigned getExpansionLineNumber(bool *Invalid = nullptr) const; |
395 | unsigned getExpansionColumnNumber(bool *Invalid = nullptr) const; |
396 | |
397 | unsigned getSpellingLineNumber(bool *Invalid = nullptr) const; |
398 | unsigned getSpellingColumnNumber(bool *Invalid = nullptr) const; |
399 | |
400 | const char *getCharacterData(bool *Invalid = nullptr) const; |
401 | |
402 | unsigned getLineNumber(bool *Invalid = nullptr) const; |
403 | unsigned getColumnNumber(bool *Invalid = nullptr) const; |
404 | |
405 | const FileEntry *getFileEntry() const; |
406 | |
407 | /// Return a StringRef to the source buffer data for the |
408 | /// specified FileID. |
409 | StringRef getBufferData(bool *Invalid = nullptr) const; |
410 | |
411 | /// Decompose the specified location into a raw FileID + Offset pair. |
412 | /// |
413 | /// The first element is the FileID, the second is the offset from the |
414 | /// start of the buffer of the location. |
415 | std::pair<FileID, unsigned> getDecomposedLoc() const; |
416 | |
417 | bool isInSystemHeader() const; |
418 | |
419 | /// Determines the order of 2 source locations in the translation unit. |
420 | /// |
421 | /// \returns true if this source location comes before 'Loc', false otherwise. |
422 | bool isBeforeInTranslationUnitThan(SourceLocation Loc) const; |
423 | |
424 | /// Determines the order of 2 source locations in the translation unit. |
425 | /// |
426 | /// \returns true if this source location comes before 'Loc', false otherwise. |
427 | bool isBeforeInTranslationUnitThan(FullSourceLoc Loc) const { |
428 | assert(Loc.isValid())((Loc.isValid()) ? static_cast<void> (0) : __assert_fail ("Loc.isValid()", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Basic/SourceLocation.h" , 428, __PRETTY_FUNCTION__)); |
429 | assert(SrcMgr == Loc.SrcMgr && "Loc comes from another SourceManager!")((SrcMgr == Loc.SrcMgr && "Loc comes from another SourceManager!" ) ? static_cast<void> (0) : __assert_fail ("SrcMgr == Loc.SrcMgr && \"Loc comes from another SourceManager!\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/Basic/SourceLocation.h" , 429, __PRETTY_FUNCTION__)); |
430 | return isBeforeInTranslationUnitThan((SourceLocation)Loc); |
431 | } |
432 | |
433 | /// Comparison function class, useful for sorting FullSourceLocs. |
434 | struct BeforeThanCompare { |
435 | bool operator()(const FullSourceLoc& lhs, const FullSourceLoc& rhs) const { |
436 | return lhs.isBeforeInTranslationUnitThan(rhs); |
437 | } |
438 | }; |
439 | |
440 | /// Prints information about this FullSourceLoc to stderr. |
441 | /// |
442 | /// This is useful for debugging. |
443 | void dump() const; |
444 | |
445 | friend bool |
446 | operator==(const FullSourceLoc &LHS, const FullSourceLoc &RHS) { |
447 | return LHS.getRawEncoding() == RHS.getRawEncoding() && |
448 | LHS.SrcMgr == RHS.SrcMgr; |
449 | } |
450 | |
451 | friend bool |
452 | operator!=(const FullSourceLoc &LHS, const FullSourceLoc &RHS) { |
453 | return !(LHS == RHS); |
454 | } |
455 | }; |
456 | |
457 | } // namespace clang |
458 | |
459 | namespace llvm { |
460 | |
461 | /// Define DenseMapInfo so that FileID's can be used as keys in DenseMap and |
462 | /// DenseSets. |
463 | template <> |
464 | struct DenseMapInfo<clang::FileID> { |
465 | static clang::FileID getEmptyKey() { |
466 | return {}; |
467 | } |
468 | |
469 | static clang::FileID getTombstoneKey() { |
470 | return clang::FileID::getSentinel(); |
471 | } |
472 | |
473 | static unsigned getHashValue(clang::FileID S) { |
474 | return S.getHashValue(); |
475 | } |
476 | |
477 | static bool isEqual(clang::FileID LHS, clang::FileID RHS) { |
478 | return LHS == RHS; |
479 | } |
480 | }; |
481 | |
482 | // Teach SmallPtrSet how to handle SourceLocation. |
483 | template<> |
484 | struct PointerLikeTypeTraits<clang::SourceLocation> { |
485 | static constexpr int NumLowBitsAvailable = 0; |
486 | |
487 | static void *getAsVoidPointer(clang::SourceLocation L) { |
488 | return L.getPtrEncoding(); |
489 | } |
490 | |
491 | static clang::SourceLocation getFromVoidPointer(void *P) { |
492 | return clang::SourceLocation::getFromRawEncoding((unsigned)(uintptr_t)P); |
493 | } |
494 | }; |
495 | |
496 | } // namespace llvm |
497 | |
498 | #endif // LLVM_CLANG_BASIC_SOURCELOCATION_H |