File: | clang/lib/Sema/SemaDecl.cpp |
Warning: | line 16372, column 7 Called C++ object pointer is null |
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1 | //===--- SemaDecl.cpp - Semantic Analysis for Declarations ----------------===// | ||||||||
2 | // | ||||||||
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. | ||||||||
4 | // See https://llvm.org/LICENSE.txt for license information. | ||||||||
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | ||||||||
6 | // | ||||||||
7 | //===----------------------------------------------------------------------===// | ||||||||
8 | // | ||||||||
9 | // This file implements semantic analysis for declarations. | ||||||||
10 | // | ||||||||
11 | //===----------------------------------------------------------------------===// | ||||||||
12 | |||||||||
13 | #include "TypeLocBuilder.h" | ||||||||
14 | #include "clang/AST/ASTConsumer.h" | ||||||||
15 | #include "clang/AST/ASTContext.h" | ||||||||
16 | #include "clang/AST/ASTLambda.h" | ||||||||
17 | #include "clang/AST/CXXInheritance.h" | ||||||||
18 | #include "clang/AST/CharUnits.h" | ||||||||
19 | #include "clang/AST/CommentDiagnostic.h" | ||||||||
20 | #include "clang/AST/DeclCXX.h" | ||||||||
21 | #include "clang/AST/DeclObjC.h" | ||||||||
22 | #include "clang/AST/DeclTemplate.h" | ||||||||
23 | #include "clang/AST/EvaluatedExprVisitor.h" | ||||||||
24 | #include "clang/AST/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 |
1 | //===- Type.h - C Language Family Type Representation -----------*- C++ -*-===// | ||||||||
2 | // | ||||||||
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. | ||||||||
4 | // See https://llvm.org/LICENSE.txt for license information. | ||||||||
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | ||||||||
6 | // | ||||||||
7 | //===----------------------------------------------------------------------===// | ||||||||
8 | // | ||||||||
9 | /// \file | ||||||||
10 | /// C Language Family Type Representation | ||||||||
11 | /// | ||||||||
12 | /// This file defines the clang::Type interface and subclasses, used to | ||||||||
13 | /// represent types for languages in the C family. | ||||||||
14 | // | ||||||||
15 | //===----------------------------------------------------------------------===// | ||||||||
16 | |||||||||
17 | #ifndef LLVM_CLANG_AST_TYPE_H | ||||||||
18 | #define LLVM_CLANG_AST_TYPE_H | ||||||||
19 | |||||||||
20 | #include "clang/AST/DependencyFlags.h" | ||||||||
21 | #include "clang/AST/NestedNameSpecifier.h" | ||||||||
22 | #include "clang/AST/TemplateName.h" | ||||||||
23 | #include "clang/Basic/AddressSpaces.h" | ||||||||
24 | #include "clang/Basic/AttrKinds.h" | ||||||||
25 | #include "clang/Basic/Diagnostic.h" | ||||||||
26 | #include "clang/Basic/ExceptionSpecificationType.h" | ||||||||
27 | #include "clang/Basic/LLVM.h" | ||||||||
28 | #include "clang/Basic/Linkage.h" | ||||||||
29 | #include "clang/Basic/PartialDiagnostic.h" | ||||||||
30 | #include "clang/Basic/SourceLocation.h" | ||||||||
31 | #include "clang/Basic/Specifiers.h" | ||||||||
32 | #include "clang/Basic/Visibility.h" | ||||||||
33 | #include "llvm/ADT/APInt.h" | ||||||||
34 | #include "llvm/ADT/APSInt.h" | ||||||||
35 | #include "llvm/ADT/ArrayRef.h" | ||||||||
36 | #include "llvm/ADT/FoldingSet.h" | ||||||||
37 | #include "llvm/ADT/None.h" | ||||||||
38 | #include "llvm/ADT/Optional.h" | ||||||||
39 | #include "llvm/ADT/PointerIntPair.h" | ||||||||
40 | #include "llvm/ADT/PointerUnion.h" | ||||||||
41 | #include "llvm/ADT/StringRef.h" | ||||||||
42 | #include "llvm/ADT/Twine.h" | ||||||||
43 | #include "llvm/ADT/iterator_range.h" | ||||||||
44 | #include "llvm/Support/Casting.h" | ||||||||
45 | #include "llvm/Support/Compiler.h" | ||||||||
46 | #include "llvm/Support/ErrorHandling.h" | ||||||||
47 | #include "llvm/Support/PointerLikeTypeTraits.h" | ||||||||
48 | #include "llvm/Support/TrailingObjects.h" | ||||||||
49 | #include "llvm/Support/type_traits.h" | ||||||||
50 | #include <cassert> | ||||||||
51 | #include <cstddef> | ||||||||
52 | #include <cstdint> | ||||||||
53 | #include <cstring> | ||||||||
54 | #include <string> | ||||||||
55 | #include <type_traits> | ||||||||
56 | #include <utility> | ||||||||
57 | |||||||||
58 | namespace clang { | ||||||||
59 | |||||||||
60 | class ExtQuals; | ||||||||
61 | class QualType; | ||||||||
62 | class ConceptDecl; | ||||||||
63 | class TagDecl; | ||||||||
64 | class Type; | ||||||||
65 | |||||||||
66 | enum { | ||||||||
67 | TypeAlignmentInBits = 4, | ||||||||
68 | TypeAlignment = 1 << TypeAlignmentInBits | ||||||||
69 | }; | ||||||||
70 | |||||||||
71 | namespace serialization { | ||||||||
72 | template <class T> class AbstractTypeReader; | ||||||||
73 | template <class T> class AbstractTypeWriter; | ||||||||
74 | } | ||||||||
75 | |||||||||
76 | } // namespace clang | ||||||||
77 | |||||||||
78 | namespace llvm { | ||||||||
79 | |||||||||
80 | template <typename T> | ||||||||
81 | struct PointerLikeTypeTraits; | ||||||||
82 | template<> | ||||||||
83 | struct PointerLikeTypeTraits< ::clang::Type*> { | ||||||||
84 | static inline void *getAsVoidPointer(::clang::Type *P) { return P; } | ||||||||
85 | |||||||||
86 | static inline ::clang::Type *getFromVoidPointer(void *P) { | ||||||||
87 | return static_cast< ::clang::Type*>(P); | ||||||||
88 | } | ||||||||
89 | |||||||||
90 | static constexpr int NumLowBitsAvailable = clang::TypeAlignmentInBits; | ||||||||
91 | }; | ||||||||
92 | |||||||||
93 | template<> | ||||||||
94 | struct PointerLikeTypeTraits< ::clang::ExtQuals*> { | ||||||||
95 | static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; } | ||||||||
96 | |||||||||
97 | static inline ::clang::ExtQuals *getFromVoidPointer(void *P) { | ||||||||
98 | return static_cast< ::clang::ExtQuals*>(P); | ||||||||
99 | } | ||||||||
100 | |||||||||
101 | static constexpr int NumLowBitsAvailable = clang::TypeAlignmentInBits; | ||||||||
102 | }; | ||||||||
103 | |||||||||
104 | } // namespace llvm | ||||||||
105 | |||||||||
106 | namespace clang { | ||||||||
107 | |||||||||
108 | class ASTContext; | ||||||||
109 | template <typename> class CanQual; | ||||||||
110 | class CXXRecordDecl; | ||||||||
111 | class DeclContext; | ||||||||
112 | class EnumDecl; | ||||||||
113 | class Expr; | ||||||||
114 | class ExtQualsTypeCommonBase; | ||||||||
115 | class FunctionDecl; | ||||||||
116 | class IdentifierInfo; | ||||||||
117 | class NamedDecl; | ||||||||
118 | class ObjCInterfaceDecl; | ||||||||
119 | class ObjCProtocolDecl; | ||||||||
120 | class ObjCTypeParamDecl; | ||||||||
121 | struct PrintingPolicy; | ||||||||
122 | class RecordDecl; | ||||||||
123 | class Stmt; | ||||||||
124 | class TagDecl; | ||||||||
125 | class TemplateArgument; | ||||||||
126 | class TemplateArgumentListInfo; | ||||||||
127 | class TemplateArgumentLoc; | ||||||||
128 | class TemplateTypeParmDecl; | ||||||||
129 | class TypedefNameDecl; | ||||||||
130 | class UnresolvedUsingTypenameDecl; | ||||||||
131 | |||||||||
132 | using CanQualType = CanQual<Type>; | ||||||||
133 | |||||||||
134 | // Provide forward declarations for all of the *Type classes. | ||||||||
135 | #define TYPE(Class, Base) class Class##Type; | ||||||||
136 | #include "clang/AST/TypeNodes.inc" | ||||||||
137 | |||||||||
138 | /// The collection of all-type qualifiers we support. | ||||||||
139 | /// Clang supports five independent qualifiers: | ||||||||
140 | /// * C99: const, volatile, and restrict | ||||||||
141 | /// * MS: __unaligned | ||||||||
142 | /// * Embedded C (TR18037): address spaces | ||||||||
143 | /// * Objective C: the GC attributes (none, weak, or strong) | ||||||||
144 | class Qualifiers { | ||||||||
145 | public: | ||||||||
146 | enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. | ||||||||
147 | Const = 0x1, | ||||||||
148 | Restrict = 0x2, | ||||||||
149 | Volatile = 0x4, | ||||||||
150 | CVRMask = Const | Volatile | Restrict | ||||||||
151 | }; | ||||||||
152 | |||||||||
153 | enum GC { | ||||||||
154 | GCNone = 0, | ||||||||
155 | Weak, | ||||||||
156 | Strong | ||||||||
157 | }; | ||||||||
158 | |||||||||
159 | enum ObjCLifetime { | ||||||||
160 | /// There is no lifetime qualification on this type. | ||||||||
161 | OCL_None, | ||||||||
162 | |||||||||
163 | /// This object can be modified without requiring retains or | ||||||||
164 | /// releases. | ||||||||
165 | OCL_ExplicitNone, | ||||||||
166 | |||||||||
167 | /// Assigning into this object requires the old value to be | ||||||||
168 | /// released and the new value to be retained. The timing of the | ||||||||
169 | /// release of the old value is inexact: it may be moved to | ||||||||
170 | /// immediately after the last known point where the value is | ||||||||
171 | /// live. | ||||||||
172 | OCL_Strong, | ||||||||
173 | |||||||||
174 | /// Reading or writing from this object requires a barrier call. | ||||||||
175 | OCL_Weak, | ||||||||
176 | |||||||||
177 | /// Assigning into this object requires a lifetime extension. | ||||||||
178 | OCL_Autoreleasing | ||||||||
179 | }; | ||||||||
180 | |||||||||
181 | enum { | ||||||||
182 | /// The maximum supported address space number. | ||||||||
183 | /// 23 bits should be enough for anyone. | ||||||||
184 | MaxAddressSpace = 0x7fffffu, | ||||||||
185 | |||||||||
186 | /// The width of the "fast" qualifier mask. | ||||||||
187 | FastWidth = 3, | ||||||||
188 | |||||||||
189 | /// The fast qualifier mask. | ||||||||
190 | FastMask = (1 << FastWidth) - 1 | ||||||||
191 | }; | ||||||||
192 | |||||||||
193 | /// Returns the common set of qualifiers while removing them from | ||||||||
194 | /// the given sets. | ||||||||
195 | static Qualifiers removeCommonQualifiers(Qualifiers &L, Qualifiers &R) { | ||||||||
196 | // If both are only CVR-qualified, bit operations are sufficient. | ||||||||
197 | if (!(L.Mask & ~CVRMask) && !(R.Mask & ~CVRMask)) { | ||||||||
198 | Qualifiers Q; | ||||||||
199 | Q.Mask = L.Mask & R.Mask; | ||||||||
200 | L.Mask &= ~Q.Mask; | ||||||||
201 | R.Mask &= ~Q.Mask; | ||||||||
202 | return Q; | ||||||||
203 | } | ||||||||
204 | |||||||||
205 | Qualifiers Q; | ||||||||
206 | unsigned CommonCRV = L.getCVRQualifiers() & R.getCVRQualifiers(); | ||||||||
207 | Q.addCVRQualifiers(CommonCRV); | ||||||||
208 | L.removeCVRQualifiers(CommonCRV); | ||||||||
209 | R.removeCVRQualifiers(CommonCRV); | ||||||||
210 | |||||||||
211 | if (L.getObjCGCAttr() == R.getObjCGCAttr()) { | ||||||||
212 | Q.setObjCGCAttr(L.getObjCGCAttr()); | ||||||||
213 | L.removeObjCGCAttr(); | ||||||||
214 | R.removeObjCGCAttr(); | ||||||||
215 | } | ||||||||
216 | |||||||||
217 | if (L.getObjCLifetime() == R.getObjCLifetime()) { | ||||||||
218 | Q.setObjCLifetime(L.getObjCLifetime()); | ||||||||
219 | L.removeObjCLifetime(); | ||||||||
220 | R.removeObjCLifetime(); | ||||||||
221 | } | ||||||||
222 | |||||||||
223 | if (L.getAddressSpace() == R.getAddressSpace()) { | ||||||||
224 | Q.setAddressSpace(L.getAddressSpace()); | ||||||||
225 | L.removeAddressSpace(); | ||||||||
226 | R.removeAddressSpace(); | ||||||||
227 | } | ||||||||
228 | return Q; | ||||||||
229 | } | ||||||||
230 | |||||||||
231 | static Qualifiers fromFastMask(unsigned Mask) { | ||||||||
232 | Qualifiers Qs; | ||||||||
233 | Qs.addFastQualifiers(Mask); | ||||||||
234 | return Qs; | ||||||||
235 | } | ||||||||
236 | |||||||||
237 | static Qualifiers fromCVRMask(unsigned CVR) { | ||||||||
238 | Qualifiers Qs; | ||||||||
239 | Qs.addCVRQualifiers(CVR); | ||||||||
240 | return Qs; | ||||||||
241 | } | ||||||||
242 | |||||||||
243 | static Qualifiers fromCVRUMask(unsigned CVRU) { | ||||||||
244 | Qualifiers Qs; | ||||||||
245 | Qs.addCVRUQualifiers(CVRU); | ||||||||
246 | return Qs; | ||||||||
247 | } | ||||||||
248 | |||||||||
249 | // Deserialize qualifiers from an opaque representation. | ||||||||
250 | static Qualifiers fromOpaqueValue(unsigned opaque) { | ||||||||
251 | Qualifiers Qs; | ||||||||
252 | Qs.Mask = opaque; | ||||||||
253 | return Qs; | ||||||||
254 | } | ||||||||
255 | |||||||||
256 | // Serialize these qualifiers into an opaque representation. | ||||||||
257 | unsigned getAsOpaqueValue() const { | ||||||||
258 | return Mask; | ||||||||
259 | } | ||||||||
260 | |||||||||
261 | bool hasConst() const { return Mask & Const; } | ||||||||
262 | bool hasOnlyConst() const { return Mask == Const; } | ||||||||
263 | void removeConst() { Mask &= ~Const; } | ||||||||
264 | void addConst() { Mask |= Const; } | ||||||||
265 | |||||||||
266 | bool hasVolatile() const { return Mask & Volatile; } | ||||||||
267 | bool hasOnlyVolatile() const { return Mask == Volatile; } | ||||||||
268 | void removeVolatile() { Mask &= ~Volatile; } | ||||||||
269 | void addVolatile() { Mask |= Volatile; } | ||||||||
270 | |||||||||
271 | bool hasRestrict() const { return Mask & Restrict; } | ||||||||
272 | bool hasOnlyRestrict() const { return Mask == Restrict; } | ||||||||
273 | void removeRestrict() { Mask &= ~Restrict; } | ||||||||
274 | void addRestrict() { Mask |= Restrict; } | ||||||||
275 | |||||||||
276 | bool hasCVRQualifiers() const { return getCVRQualifiers(); } | ||||||||
277 | unsigned getCVRQualifiers() const { return Mask & CVRMask; } | ||||||||
278 | unsigned getCVRUQualifiers() const { return Mask & (CVRMask | UMask); } | ||||||||
279 | |||||||||
280 | void setCVRQualifiers(unsigned mask) { | ||||||||
281 | assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits")((!(mask & ~CVRMask) && "bitmask contains non-CVR bits" ) ? static_cast<void> (0) : __assert_fail ("!(mask & ~CVRMask) && \"bitmask contains non-CVR bits\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 281, __PRETTY_FUNCTION__)); | ||||||||
282 | Mask = (Mask & ~CVRMask) | mask; | ||||||||
283 | } | ||||||||
284 | void removeCVRQualifiers(unsigned mask) { | ||||||||
285 | assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits")((!(mask & ~CVRMask) && "bitmask contains non-CVR bits" ) ? static_cast<void> (0) : __assert_fail ("!(mask & ~CVRMask) && \"bitmask contains non-CVR bits\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 285, __PRETTY_FUNCTION__)); | ||||||||
286 | Mask &= ~mask; | ||||||||
287 | } | ||||||||
288 | void removeCVRQualifiers() { | ||||||||
289 | removeCVRQualifiers(CVRMask); | ||||||||
290 | } | ||||||||
291 | void addCVRQualifiers(unsigned mask) { | ||||||||
292 | assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits")((!(mask & ~CVRMask) && "bitmask contains non-CVR bits" ) ? static_cast<void> (0) : __assert_fail ("!(mask & ~CVRMask) && \"bitmask contains non-CVR bits\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 292, __PRETTY_FUNCTION__)); | ||||||||
293 | Mask |= mask; | ||||||||
294 | } | ||||||||
295 | void addCVRUQualifiers(unsigned mask) { | ||||||||
296 | assert(!(mask & ~CVRMask & ~UMask) && "bitmask contains non-CVRU bits")((!(mask & ~CVRMask & ~UMask) && "bitmask contains non-CVRU bits" ) ? static_cast<void> (0) : __assert_fail ("!(mask & ~CVRMask & ~UMask) && \"bitmask contains non-CVRU bits\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 296, __PRETTY_FUNCTION__)); | ||||||||
297 | Mask |= mask; | ||||||||
298 | } | ||||||||
299 | |||||||||
300 | bool hasUnaligned() const { return Mask & UMask; } | ||||||||
301 | void setUnaligned(bool flag) { | ||||||||
302 | Mask = (Mask & ~UMask) | (flag ? UMask : 0); | ||||||||
303 | } | ||||||||
304 | void removeUnaligned() { Mask &= ~UMask; } | ||||||||
305 | void addUnaligned() { Mask |= UMask; } | ||||||||
306 | |||||||||
307 | bool hasObjCGCAttr() const { return Mask & GCAttrMask; } | ||||||||
308 | GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); } | ||||||||
309 | void setObjCGCAttr(GC type) { | ||||||||
310 | Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift); | ||||||||
311 | } | ||||||||
312 | void removeObjCGCAttr() { setObjCGCAttr(GCNone); } | ||||||||
313 | void addObjCGCAttr(GC type) { | ||||||||
314 | assert(type)((type) ? static_cast<void> (0) : __assert_fail ("type" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 314, __PRETTY_FUNCTION__)); | ||||||||
315 | setObjCGCAttr(type); | ||||||||
316 | } | ||||||||
317 | Qualifiers withoutObjCGCAttr() const { | ||||||||
318 | Qualifiers qs = *this; | ||||||||
319 | qs.removeObjCGCAttr(); | ||||||||
320 | return qs; | ||||||||
321 | } | ||||||||
322 | Qualifiers withoutObjCLifetime() const { | ||||||||
323 | Qualifiers qs = *this; | ||||||||
324 | qs.removeObjCLifetime(); | ||||||||
325 | return qs; | ||||||||
326 | } | ||||||||
327 | Qualifiers withoutAddressSpace() const { | ||||||||
328 | Qualifiers qs = *this; | ||||||||
329 | qs.removeAddressSpace(); | ||||||||
330 | return qs; | ||||||||
331 | } | ||||||||
332 | |||||||||
333 | bool hasObjCLifetime() const { return Mask & LifetimeMask; } | ||||||||
334 | ObjCLifetime getObjCLifetime() const { | ||||||||
335 | return ObjCLifetime((Mask & LifetimeMask) >> LifetimeShift); | ||||||||
336 | } | ||||||||
337 | void setObjCLifetime(ObjCLifetime type) { | ||||||||
338 | Mask = (Mask & ~LifetimeMask) | (type << LifetimeShift); | ||||||||
339 | } | ||||||||
340 | void removeObjCLifetime() { setObjCLifetime(OCL_None); } | ||||||||
341 | void addObjCLifetime(ObjCLifetime type) { | ||||||||
342 | assert(type)((type) ? static_cast<void> (0) : __assert_fail ("type" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 342, __PRETTY_FUNCTION__)); | ||||||||
343 | assert(!hasObjCLifetime())((!hasObjCLifetime()) ? static_cast<void> (0) : __assert_fail ("!hasObjCLifetime()", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 343, __PRETTY_FUNCTION__)); | ||||||||
344 | Mask |= (type << LifetimeShift); | ||||||||
345 | } | ||||||||
346 | |||||||||
347 | /// True if the lifetime is neither None or ExplicitNone. | ||||||||
348 | bool hasNonTrivialObjCLifetime() const { | ||||||||
349 | ObjCLifetime lifetime = getObjCLifetime(); | ||||||||
350 | return (lifetime > OCL_ExplicitNone); | ||||||||
351 | } | ||||||||
352 | |||||||||
353 | /// True if the lifetime is either strong or weak. | ||||||||
354 | bool hasStrongOrWeakObjCLifetime() const { | ||||||||
355 | ObjCLifetime lifetime = getObjCLifetime(); | ||||||||
356 | return (lifetime == OCL_Strong || lifetime == OCL_Weak); | ||||||||
357 | } | ||||||||
358 | |||||||||
359 | bool hasAddressSpace() const { return Mask & AddressSpaceMask; } | ||||||||
360 | LangAS getAddressSpace() const { | ||||||||
361 | return static_cast<LangAS>(Mask >> AddressSpaceShift); | ||||||||
362 | } | ||||||||
363 | bool hasTargetSpecificAddressSpace() const { | ||||||||
364 | return isTargetAddressSpace(getAddressSpace()); | ||||||||
365 | } | ||||||||
366 | /// Get the address space attribute value to be printed by diagnostics. | ||||||||
367 | unsigned getAddressSpaceAttributePrintValue() const { | ||||||||
368 | auto Addr = getAddressSpace(); | ||||||||
369 | // This function is not supposed to be used with language specific | ||||||||
370 | // address spaces. If that happens, the diagnostic message should consider | ||||||||
371 | // printing the QualType instead of the address space value. | ||||||||
372 | assert(Addr == LangAS::Default || hasTargetSpecificAddressSpace())((Addr == LangAS::Default || hasTargetSpecificAddressSpace()) ? static_cast<void> (0) : __assert_fail ("Addr == LangAS::Default || hasTargetSpecificAddressSpace()" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 372, __PRETTY_FUNCTION__)); | ||||||||
373 | if (Addr != LangAS::Default) | ||||||||
374 | return toTargetAddressSpace(Addr); | ||||||||
375 | // TODO: The diagnostic messages where Addr may be 0 should be fixed | ||||||||
376 | // since it cannot differentiate the situation where 0 denotes the default | ||||||||
377 | // address space or user specified __attribute__((address_space(0))). | ||||||||
378 | return 0; | ||||||||
379 | } | ||||||||
380 | void setAddressSpace(LangAS space) { | ||||||||
381 | assert((unsigned)space <= MaxAddressSpace)(((unsigned)space <= MaxAddressSpace) ? static_cast<void > (0) : __assert_fail ("(unsigned)space <= MaxAddressSpace" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 381, __PRETTY_FUNCTION__)); | ||||||||
382 | Mask = (Mask & ~AddressSpaceMask) | ||||||||
383 | | (((uint32_t) space) << AddressSpaceShift); | ||||||||
384 | } | ||||||||
385 | void removeAddressSpace() { setAddressSpace(LangAS::Default); } | ||||||||
386 | void addAddressSpace(LangAS space) { | ||||||||
387 | assert(space != LangAS::Default)((space != LangAS::Default) ? static_cast<void> (0) : __assert_fail ("space != LangAS::Default", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 387, __PRETTY_FUNCTION__)); | ||||||||
388 | setAddressSpace(space); | ||||||||
389 | } | ||||||||
390 | |||||||||
391 | // Fast qualifiers are those that can be allocated directly | ||||||||
392 | // on a QualType object. | ||||||||
393 | bool hasFastQualifiers() const { return getFastQualifiers(); } | ||||||||
394 | unsigned getFastQualifiers() const { return Mask & FastMask; } | ||||||||
395 | void setFastQualifiers(unsigned mask) { | ||||||||
396 | assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits")((!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits" ) ? static_cast<void> (0) : __assert_fail ("!(mask & ~FastMask) && \"bitmask contains non-fast qualifier bits\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 396, __PRETTY_FUNCTION__)); | ||||||||
397 | Mask = (Mask & ~FastMask) | mask; | ||||||||
398 | } | ||||||||
399 | void removeFastQualifiers(unsigned mask) { | ||||||||
400 | assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits")((!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits" ) ? static_cast<void> (0) : __assert_fail ("!(mask & ~FastMask) && \"bitmask contains non-fast qualifier bits\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 400, __PRETTY_FUNCTION__)); | ||||||||
401 | Mask &= ~mask; | ||||||||
402 | } | ||||||||
403 | void removeFastQualifiers() { | ||||||||
404 | removeFastQualifiers(FastMask); | ||||||||
405 | } | ||||||||
406 | void addFastQualifiers(unsigned mask) { | ||||||||
407 | assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits")((!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits" ) ? static_cast<void> (0) : __assert_fail ("!(mask & ~FastMask) && \"bitmask contains non-fast qualifier bits\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 407, __PRETTY_FUNCTION__)); | ||||||||
408 | Mask |= mask; | ||||||||
409 | } | ||||||||
410 | |||||||||
411 | /// Return true if the set contains any qualifiers which require an ExtQuals | ||||||||
412 | /// node to be allocated. | ||||||||
413 | bool hasNonFastQualifiers() const { return Mask & ~FastMask; } | ||||||||
414 | Qualifiers getNonFastQualifiers() const { | ||||||||
415 | Qualifiers Quals = *this; | ||||||||
416 | Quals.setFastQualifiers(0); | ||||||||
417 | return Quals; | ||||||||
418 | } | ||||||||
419 | |||||||||
420 | /// Return true if the set contains any qualifiers. | ||||||||
421 | bool hasQualifiers() const { return Mask; } | ||||||||
422 | bool empty() const { return !Mask; } | ||||||||
423 | |||||||||
424 | /// Add the qualifiers from the given set to this set. | ||||||||
425 | void addQualifiers(Qualifiers Q) { | ||||||||
426 | // If the other set doesn't have any non-boolean qualifiers, just | ||||||||
427 | // bit-or it in. | ||||||||
428 | if (!(Q.Mask & ~CVRMask)) | ||||||||
429 | Mask |= Q.Mask; | ||||||||
430 | else { | ||||||||
431 | Mask |= (Q.Mask & CVRMask); | ||||||||
432 | if (Q.hasAddressSpace()) | ||||||||
433 | addAddressSpace(Q.getAddressSpace()); | ||||||||
434 | if (Q.hasObjCGCAttr()) | ||||||||
435 | addObjCGCAttr(Q.getObjCGCAttr()); | ||||||||
436 | if (Q.hasObjCLifetime()) | ||||||||
437 | addObjCLifetime(Q.getObjCLifetime()); | ||||||||
438 | } | ||||||||
439 | } | ||||||||
440 | |||||||||
441 | /// Remove the qualifiers from the given set from this set. | ||||||||
442 | void removeQualifiers(Qualifiers Q) { | ||||||||
443 | // If the other set doesn't have any non-boolean qualifiers, just | ||||||||
444 | // bit-and the inverse in. | ||||||||
445 | if (!(Q.Mask & ~CVRMask)) | ||||||||
446 | Mask &= ~Q.Mask; | ||||||||
447 | else { | ||||||||
448 | Mask &= ~(Q.Mask & CVRMask); | ||||||||
449 | if (getObjCGCAttr() == Q.getObjCGCAttr()) | ||||||||
450 | removeObjCGCAttr(); | ||||||||
451 | if (getObjCLifetime() == Q.getObjCLifetime()) | ||||||||
452 | removeObjCLifetime(); | ||||||||
453 | if (getAddressSpace() == Q.getAddressSpace()) | ||||||||
454 | removeAddressSpace(); | ||||||||
455 | } | ||||||||
456 | } | ||||||||
457 | |||||||||
458 | /// Add the qualifiers from the given set to this set, given that | ||||||||
459 | /// they don't conflict. | ||||||||
460 | void addConsistentQualifiers(Qualifiers qs) { | ||||||||
461 | assert(getAddressSpace() == qs.getAddressSpace() ||((getAddressSpace() == qs.getAddressSpace() || !hasAddressSpace () || !qs.hasAddressSpace()) ? static_cast<void> (0) : __assert_fail ("getAddressSpace() == qs.getAddressSpace() || !hasAddressSpace() || !qs.hasAddressSpace()" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 462, __PRETTY_FUNCTION__)) | ||||||||
462 | !hasAddressSpace() || !qs.hasAddressSpace())((getAddressSpace() == qs.getAddressSpace() || !hasAddressSpace () || !qs.hasAddressSpace()) ? static_cast<void> (0) : __assert_fail ("getAddressSpace() == qs.getAddressSpace() || !hasAddressSpace() || !qs.hasAddressSpace()" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 462, __PRETTY_FUNCTION__)); | ||||||||
463 | assert(getObjCGCAttr() == qs.getObjCGCAttr() ||((getObjCGCAttr() == qs.getObjCGCAttr() || !hasObjCGCAttr() || !qs.hasObjCGCAttr()) ? static_cast<void> (0) : __assert_fail ("getObjCGCAttr() == qs.getObjCGCAttr() || !hasObjCGCAttr() || !qs.hasObjCGCAttr()" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 464, __PRETTY_FUNCTION__)) | ||||||||
464 | !hasObjCGCAttr() || !qs.hasObjCGCAttr())((getObjCGCAttr() == qs.getObjCGCAttr() || !hasObjCGCAttr() || !qs.hasObjCGCAttr()) ? static_cast<void> (0) : __assert_fail ("getObjCGCAttr() == qs.getObjCGCAttr() || !hasObjCGCAttr() || !qs.hasObjCGCAttr()" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 464, __PRETTY_FUNCTION__)); | ||||||||
465 | assert(getObjCLifetime() == qs.getObjCLifetime() ||((getObjCLifetime() == qs.getObjCLifetime() || !hasObjCLifetime () || !qs.hasObjCLifetime()) ? static_cast<void> (0) : __assert_fail ("getObjCLifetime() == qs.getObjCLifetime() || !hasObjCLifetime() || !qs.hasObjCLifetime()" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 466, __PRETTY_FUNCTION__)) | ||||||||
466 | !hasObjCLifetime() || !qs.hasObjCLifetime())((getObjCLifetime() == qs.getObjCLifetime() || !hasObjCLifetime () || !qs.hasObjCLifetime()) ? static_cast<void> (0) : __assert_fail ("getObjCLifetime() == qs.getObjCLifetime() || !hasObjCLifetime() || !qs.hasObjCLifetime()" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 466, __PRETTY_FUNCTION__)); | ||||||||
467 | Mask |= qs.Mask; | ||||||||
468 | } | ||||||||
469 | |||||||||
470 | /// Returns true if address space A is equal to or a superset of B. | ||||||||
471 | /// OpenCL v2.0 defines conversion rules (OpenCLC v2.0 s6.5.5) and notion of | ||||||||
472 | /// overlapping address spaces. | ||||||||
473 | /// CL1.1 or CL1.2: | ||||||||
474 | /// every address space is a superset of itself. | ||||||||
475 | /// CL2.0 adds: | ||||||||
476 | /// __generic is a superset of any address space except for __constant. | ||||||||
477 | static bool isAddressSpaceSupersetOf(LangAS A, LangAS B) { | ||||||||
478 | // Address spaces must match exactly. | ||||||||
479 | return A == B || | ||||||||
480 | // Otherwise in OpenCLC v2.0 s6.5.5: every address space except | ||||||||
481 | // for __constant can be used as __generic. | ||||||||
482 | (A == LangAS::opencl_generic && B != LangAS::opencl_constant) || | ||||||||
483 | // Consider pointer size address spaces to be equivalent to default. | ||||||||
484 | ((isPtrSizeAddressSpace(A) || A == LangAS::Default) && | ||||||||
485 | (isPtrSizeAddressSpace(B) || B == LangAS::Default)); | ||||||||
486 | } | ||||||||
487 | |||||||||
488 | /// Returns true if the address space in these qualifiers is equal to or | ||||||||
489 | /// a superset of the address space in the argument qualifiers. | ||||||||
490 | bool isAddressSpaceSupersetOf(Qualifiers other) const { | ||||||||
491 | return isAddressSpaceSupersetOf(getAddressSpace(), other.getAddressSpace()); | ||||||||
492 | } | ||||||||
493 | |||||||||
494 | /// Determines if these qualifiers compatibly include another set. | ||||||||
495 | /// Generally this answers the question of whether an object with the other | ||||||||
496 | /// qualifiers can be safely used as an object with these qualifiers. | ||||||||
497 | bool compatiblyIncludes(Qualifiers other) const { | ||||||||
498 | return isAddressSpaceSupersetOf(other) && | ||||||||
499 | // ObjC GC qualifiers can match, be added, or be removed, but can't | ||||||||
500 | // be changed. | ||||||||
501 | (getObjCGCAttr() == other.getObjCGCAttr() || !hasObjCGCAttr() || | ||||||||
502 | !other.hasObjCGCAttr()) && | ||||||||
503 | // ObjC lifetime qualifiers must match exactly. | ||||||||
504 | getObjCLifetime() == other.getObjCLifetime() && | ||||||||
505 | // CVR qualifiers may subset. | ||||||||
506 | (((Mask & CVRMask) | (other.Mask & CVRMask)) == (Mask & CVRMask)) && | ||||||||
507 | // U qualifier may superset. | ||||||||
508 | (!other.hasUnaligned() || hasUnaligned()); | ||||||||
509 | } | ||||||||
510 | |||||||||
511 | /// Determines if these qualifiers compatibly include another set of | ||||||||
512 | /// qualifiers from the narrow perspective of Objective-C ARC lifetime. | ||||||||
513 | /// | ||||||||
514 | /// One set of Objective-C lifetime qualifiers compatibly includes the other | ||||||||
515 | /// if the lifetime qualifiers match, or if both are non-__weak and the | ||||||||
516 | /// including set also contains the 'const' qualifier, or both are non-__weak | ||||||||
517 | /// and one is None (which can only happen in non-ARC modes). | ||||||||
518 | bool compatiblyIncludesObjCLifetime(Qualifiers other) const { | ||||||||
519 | if (getObjCLifetime() == other.getObjCLifetime()) | ||||||||
520 | return true; | ||||||||
521 | |||||||||
522 | if (getObjCLifetime() == OCL_Weak || other.getObjCLifetime() == OCL_Weak) | ||||||||
523 | return false; | ||||||||
524 | |||||||||
525 | if (getObjCLifetime() == OCL_None || other.getObjCLifetime() == OCL_None) | ||||||||
526 | return true; | ||||||||
527 | |||||||||
528 | return hasConst(); | ||||||||
529 | } | ||||||||
530 | |||||||||
531 | /// Determine whether this set of qualifiers is a strict superset of | ||||||||
532 | /// another set of qualifiers, not considering qualifier compatibility. | ||||||||
533 | bool isStrictSupersetOf(Qualifiers Other) const; | ||||||||
534 | |||||||||
535 | bool operator==(Qualifiers Other) const { return Mask == Other.Mask; } | ||||||||
536 | bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; } | ||||||||
537 | |||||||||
538 | explicit operator bool() const { return hasQualifiers(); } | ||||||||
539 | |||||||||
540 | Qualifiers &operator+=(Qualifiers R) { | ||||||||
541 | addQualifiers(R); | ||||||||
542 | return *this; | ||||||||
543 | } | ||||||||
544 | |||||||||
545 | // Union two qualifier sets. If an enumerated qualifier appears | ||||||||
546 | // in both sets, use the one from the right. | ||||||||
547 | friend Qualifiers operator+(Qualifiers L, Qualifiers R) { | ||||||||
548 | L += R; | ||||||||
549 | return L; | ||||||||
550 | } | ||||||||
551 | |||||||||
552 | Qualifiers &operator-=(Qualifiers R) { | ||||||||
553 | removeQualifiers(R); | ||||||||
554 | return *this; | ||||||||
555 | } | ||||||||
556 | |||||||||
557 | /// Compute the difference between two qualifier sets. | ||||||||
558 | friend Qualifiers operator-(Qualifiers L, Qualifiers R) { | ||||||||
559 | L -= R; | ||||||||
560 | return L; | ||||||||
561 | } | ||||||||
562 | |||||||||
563 | std::string getAsString() const; | ||||||||
564 | std::string getAsString(const PrintingPolicy &Policy) const; | ||||||||
565 | |||||||||
566 | static std::string getAddrSpaceAsString(LangAS AS); | ||||||||
567 | |||||||||
568 | bool isEmptyWhenPrinted(const PrintingPolicy &Policy) const; | ||||||||
569 | void print(raw_ostream &OS, const PrintingPolicy &Policy, | ||||||||
570 | bool appendSpaceIfNonEmpty = false) const; | ||||||||
571 | |||||||||
572 | void Profile(llvm::FoldingSetNodeID &ID) const { | ||||||||
573 | ID.AddInteger(Mask); | ||||||||
574 | } | ||||||||
575 | |||||||||
576 | private: | ||||||||
577 | // bits: |0 1 2|3|4 .. 5|6 .. 8|9 ... 31| | ||||||||
578 | // |C R V|U|GCAttr|Lifetime|AddressSpace| | ||||||||
579 | uint32_t Mask = 0; | ||||||||
580 | |||||||||
581 | static const uint32_t UMask = 0x8; | ||||||||
582 | static const uint32_t UShift = 3; | ||||||||
583 | static const uint32_t GCAttrMask = 0x30; | ||||||||
584 | static const uint32_t GCAttrShift = 4; | ||||||||
585 | static const uint32_t LifetimeMask = 0x1C0; | ||||||||
586 | static const uint32_t LifetimeShift = 6; | ||||||||
587 | static const uint32_t AddressSpaceMask = | ||||||||
588 | ~(CVRMask | UMask | GCAttrMask | LifetimeMask); | ||||||||
589 | static const uint32_t AddressSpaceShift = 9; | ||||||||
590 | }; | ||||||||
591 | |||||||||
592 | /// A std::pair-like structure for storing a qualified type split | ||||||||
593 | /// into its local qualifiers and its locally-unqualified type. | ||||||||
594 | struct SplitQualType { | ||||||||
595 | /// The locally-unqualified type. | ||||||||
596 | const Type *Ty = nullptr; | ||||||||
597 | |||||||||
598 | /// The local qualifiers. | ||||||||
599 | Qualifiers Quals; | ||||||||
600 | |||||||||
601 | SplitQualType() = default; | ||||||||
602 | SplitQualType(const Type *ty, Qualifiers qs) : Ty(ty), Quals(qs) {} | ||||||||
603 | |||||||||
604 | SplitQualType getSingleStepDesugaredType() const; // end of this file | ||||||||
605 | |||||||||
606 | // Make std::tie work. | ||||||||
607 | std::pair<const Type *,Qualifiers> asPair() const { | ||||||||
608 | return std::pair<const Type *, Qualifiers>(Ty, Quals); | ||||||||
609 | } | ||||||||
610 | |||||||||
611 | friend bool operator==(SplitQualType a, SplitQualType b) { | ||||||||
612 | return a.Ty == b.Ty && a.Quals == b.Quals; | ||||||||
613 | } | ||||||||
614 | friend bool operator!=(SplitQualType a, SplitQualType b) { | ||||||||
615 | return a.Ty != b.Ty || a.Quals != b.Quals; | ||||||||
616 | } | ||||||||
617 | }; | ||||||||
618 | |||||||||
619 | /// The kind of type we are substituting Objective-C type arguments into. | ||||||||
620 | /// | ||||||||
621 | /// The kind of substitution affects the replacement of type parameters when | ||||||||
622 | /// no concrete type information is provided, e.g., when dealing with an | ||||||||
623 | /// unspecialized type. | ||||||||
624 | enum class ObjCSubstitutionContext { | ||||||||
625 | /// An ordinary type. | ||||||||
626 | Ordinary, | ||||||||
627 | |||||||||
628 | /// The result type of a method or function. | ||||||||
629 | Result, | ||||||||
630 | |||||||||
631 | /// The parameter type of a method or function. | ||||||||
632 | Parameter, | ||||||||
633 | |||||||||
634 | /// The type of a property. | ||||||||
635 | Property, | ||||||||
636 | |||||||||
637 | /// The superclass of a type. | ||||||||
638 | Superclass, | ||||||||
639 | }; | ||||||||
640 | |||||||||
641 | /// A (possibly-)qualified type. | ||||||||
642 | /// | ||||||||
643 | /// For efficiency, we don't store CV-qualified types as nodes on their | ||||||||
644 | /// own: instead each reference to a type stores the qualifiers. This | ||||||||
645 | /// greatly reduces the number of nodes we need to allocate for types (for | ||||||||
646 | /// example we only need one for 'int', 'const int', 'volatile int', | ||||||||
647 | /// 'const volatile int', etc). | ||||||||
648 | /// | ||||||||
649 | /// As an added efficiency bonus, instead of making this a pair, we | ||||||||
650 | /// just store the two bits we care about in the low bits of the | ||||||||
651 | /// pointer. To handle the packing/unpacking, we make QualType be a | ||||||||
652 | /// simple wrapper class that acts like a smart pointer. A third bit | ||||||||
653 | /// indicates whether there are extended qualifiers present, in which | ||||||||
654 | /// case the pointer points to a special structure. | ||||||||
655 | class QualType { | ||||||||
656 | friend class QualifierCollector; | ||||||||
657 | |||||||||
658 | // Thankfully, these are efficiently composable. | ||||||||
659 | llvm::PointerIntPair<llvm::PointerUnion<const Type *, const ExtQuals *>, | ||||||||
660 | Qualifiers::FastWidth> Value; | ||||||||
661 | |||||||||
662 | const ExtQuals *getExtQualsUnsafe() const { | ||||||||
663 | return Value.getPointer().get<const ExtQuals*>(); | ||||||||
664 | } | ||||||||
665 | |||||||||
666 | const Type *getTypePtrUnsafe() const { | ||||||||
667 | return Value.getPointer().get<const Type*>(); | ||||||||
668 | } | ||||||||
669 | |||||||||
670 | const ExtQualsTypeCommonBase *getCommonPtr() const { | ||||||||
671 | assert(!isNull() && "Cannot retrieve a NULL type pointer")((!isNull() && "Cannot retrieve a NULL type pointer") ? static_cast<void> (0) : __assert_fail ("!isNull() && \"Cannot retrieve a NULL type pointer\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 671, __PRETTY_FUNCTION__)); | ||||||||
672 | auto CommonPtrVal = reinterpret_cast<uintptr_t>(Value.getOpaqueValue()); | ||||||||
673 | CommonPtrVal &= ~(uintptr_t)((1 << TypeAlignmentInBits) - 1); | ||||||||
674 | return reinterpret_cast<ExtQualsTypeCommonBase*>(CommonPtrVal); | ||||||||
675 | } | ||||||||
676 | |||||||||
677 | public: | ||||||||
678 | QualType() = default; | ||||||||
679 | QualType(const Type *Ptr, unsigned Quals) : Value(Ptr, Quals) {} | ||||||||
680 | QualType(const ExtQuals *Ptr, unsigned Quals) : Value(Ptr, Quals) {} | ||||||||
681 | |||||||||
682 | unsigned getLocalFastQualifiers() const { return Value.getInt(); } | ||||||||
683 | void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); } | ||||||||
684 | |||||||||
685 | /// Retrieves a pointer to the underlying (unqualified) type. | ||||||||
686 | /// | ||||||||
687 | /// This function requires that the type not be NULL. If the type might be | ||||||||
688 | /// NULL, use the (slightly less efficient) \c getTypePtrOrNull(). | ||||||||
689 | const Type *getTypePtr() const; | ||||||||
690 | |||||||||
691 | const Type *getTypePtrOrNull() const; | ||||||||
692 | |||||||||
693 | /// Retrieves a pointer to the name of the base type. | ||||||||
694 | const IdentifierInfo *getBaseTypeIdentifier() const; | ||||||||
695 | |||||||||
696 | /// Divides a QualType into its unqualified type and a set of local | ||||||||
697 | /// qualifiers. | ||||||||
698 | SplitQualType split() const; | ||||||||
699 | |||||||||
700 | void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } | ||||||||
701 | |||||||||
702 | static QualType getFromOpaquePtr(const void *Ptr) { | ||||||||
703 | QualType T; | ||||||||
704 | T.Value.setFromOpaqueValue(const_cast<void*>(Ptr)); | ||||||||
705 | return T; | ||||||||
706 | } | ||||||||
707 | |||||||||
708 | const Type &operator*() const { | ||||||||
709 | return *getTypePtr(); | ||||||||
710 | } | ||||||||
711 | |||||||||
712 | const Type *operator->() const { | ||||||||
713 | return getTypePtr(); | ||||||||
714 | } | ||||||||
715 | |||||||||
716 | bool isCanonical() const; | ||||||||
717 | bool isCanonicalAsParam() const; | ||||||||
718 | |||||||||
719 | /// Return true if this QualType doesn't point to a type yet. | ||||||||
720 | bool isNull() const { | ||||||||
721 | return Value.getPointer().isNull(); | ||||||||
722 | } | ||||||||
723 | |||||||||
724 | /// Determine whether this particular QualType instance has the | ||||||||
725 | /// "const" qualifier set, without looking through typedefs that may have | ||||||||
726 | /// added "const" at a different level. | ||||||||
727 | bool isLocalConstQualified() const { | ||||||||
728 | return (getLocalFastQualifiers() & Qualifiers::Const); | ||||||||
729 | } | ||||||||
730 | |||||||||
731 | /// Determine whether this type is const-qualified. | ||||||||
732 | bool isConstQualified() const; | ||||||||
733 | |||||||||
734 | /// Determine whether this particular QualType instance has the | ||||||||
735 | /// "restrict" qualifier set, without looking through typedefs that may have | ||||||||
736 | /// added "restrict" at a different level. | ||||||||
737 | bool isLocalRestrictQualified() const { | ||||||||
738 | return (getLocalFastQualifiers() & Qualifiers::Restrict); | ||||||||
739 | } | ||||||||
740 | |||||||||
741 | /// Determine whether this type is restrict-qualified. | ||||||||
742 | bool isRestrictQualified() const; | ||||||||
743 | |||||||||
744 | /// Determine whether this particular QualType instance has the | ||||||||
745 | /// "volatile" qualifier set, without looking through typedefs that may have | ||||||||
746 | /// added "volatile" at a different level. | ||||||||
747 | bool isLocalVolatileQualified() const { | ||||||||
748 | return (getLocalFastQualifiers() & Qualifiers::Volatile); | ||||||||
749 | } | ||||||||
750 | |||||||||
751 | /// Determine whether this type is volatile-qualified. | ||||||||
752 | bool isVolatileQualified() const; | ||||||||
753 | |||||||||
754 | /// Determine whether this particular QualType instance has any | ||||||||
755 | /// qualifiers, without looking through any typedefs that might add | ||||||||
756 | /// qualifiers at a different level. | ||||||||
757 | bool hasLocalQualifiers() const { | ||||||||
758 | return getLocalFastQualifiers() || hasLocalNonFastQualifiers(); | ||||||||
759 | } | ||||||||
760 | |||||||||
761 | /// Determine whether this type has any qualifiers. | ||||||||
762 | bool hasQualifiers() const; | ||||||||
763 | |||||||||
764 | /// Determine whether this particular QualType instance has any | ||||||||
765 | /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType | ||||||||
766 | /// instance. | ||||||||
767 | bool hasLocalNonFastQualifiers() const { | ||||||||
768 | return Value.getPointer().is<const ExtQuals*>(); | ||||||||
769 | } | ||||||||
770 | |||||||||
771 | /// Retrieve the set of qualifiers local to this particular QualType | ||||||||
772 | /// instance, not including any qualifiers acquired through typedefs or | ||||||||
773 | /// other sugar. | ||||||||
774 | Qualifiers getLocalQualifiers() const; | ||||||||
775 | |||||||||
776 | /// Retrieve the set of qualifiers applied to this type. | ||||||||
777 | Qualifiers getQualifiers() const; | ||||||||
778 | |||||||||
779 | /// Retrieve the set of CVR (const-volatile-restrict) qualifiers | ||||||||
780 | /// local to this particular QualType instance, not including any qualifiers | ||||||||
781 | /// acquired through typedefs or other sugar. | ||||||||
782 | unsigned getLocalCVRQualifiers() const { | ||||||||
783 | return getLocalFastQualifiers(); | ||||||||
784 | } | ||||||||
785 | |||||||||
786 | /// Retrieve the set of CVR (const-volatile-restrict) qualifiers | ||||||||
787 | /// applied to this type. | ||||||||
788 | unsigned getCVRQualifiers() const; | ||||||||
789 | |||||||||
790 | bool isConstant(const ASTContext& Ctx) const { | ||||||||
791 | return QualType::isConstant(*this, Ctx); | ||||||||
792 | } | ||||||||
793 | |||||||||
794 | /// Determine whether this is a Plain Old Data (POD) type (C++ 3.9p10). | ||||||||
795 | bool isPODType(const ASTContext &Context) const; | ||||||||
796 | |||||||||
797 | /// Return true if this is a POD type according to the rules of the C++98 | ||||||||
798 | /// standard, regardless of the current compilation's language. | ||||||||
799 | bool isCXX98PODType(const ASTContext &Context) const; | ||||||||
800 | |||||||||
801 | /// Return true if this is a POD type according to the more relaxed rules | ||||||||
802 | /// of the C++11 standard, regardless of the current compilation's language. | ||||||||
803 | /// (C++0x [basic.types]p9). Note that, unlike | ||||||||
804 | /// CXXRecordDecl::isCXX11StandardLayout, this takes DRs into account. | ||||||||
805 | bool isCXX11PODType(const ASTContext &Context) const; | ||||||||
806 | |||||||||
807 | /// Return true if this is a trivial type per (C++0x [basic.types]p9) | ||||||||
808 | bool isTrivialType(const ASTContext &Context) const; | ||||||||
809 | |||||||||
810 | /// Return true if this is a trivially copyable type (C++0x [basic.types]p9) | ||||||||
811 | bool isTriviallyCopyableType(const ASTContext &Context) const; | ||||||||
812 | |||||||||
813 | |||||||||
814 | /// Returns true if it is a class and it might be dynamic. | ||||||||
815 | bool mayBeDynamicClass() const; | ||||||||
816 | |||||||||
817 | /// Returns true if it is not a class or if the class might not be dynamic. | ||||||||
818 | bool mayBeNotDynamicClass() const; | ||||||||
819 | |||||||||
820 | // Don't promise in the API that anything besides 'const' can be | ||||||||
821 | // easily added. | ||||||||
822 | |||||||||
823 | /// Add the `const` type qualifier to this QualType. | ||||||||
824 | void addConst() { | ||||||||
825 | addFastQualifiers(Qualifiers::Const); | ||||||||
826 | } | ||||||||
827 | QualType withConst() const { | ||||||||
828 | return withFastQualifiers(Qualifiers::Const); | ||||||||
829 | } | ||||||||
830 | |||||||||
831 | /// Add the `volatile` type qualifier to this QualType. | ||||||||
832 | void addVolatile() { | ||||||||
833 | addFastQualifiers(Qualifiers::Volatile); | ||||||||
834 | } | ||||||||
835 | QualType withVolatile() const { | ||||||||
836 | return withFastQualifiers(Qualifiers::Volatile); | ||||||||
837 | } | ||||||||
838 | |||||||||
839 | /// Add the `restrict` qualifier to this QualType. | ||||||||
840 | void addRestrict() { | ||||||||
841 | addFastQualifiers(Qualifiers::Restrict); | ||||||||
842 | } | ||||||||
843 | QualType withRestrict() const { | ||||||||
844 | return withFastQualifiers(Qualifiers::Restrict); | ||||||||
845 | } | ||||||||
846 | |||||||||
847 | QualType withCVRQualifiers(unsigned CVR) const { | ||||||||
848 | return withFastQualifiers(CVR); | ||||||||
849 | } | ||||||||
850 | |||||||||
851 | void addFastQualifiers(unsigned TQs) { | ||||||||
852 | assert(!(TQs & ~Qualifiers::FastMask)((!(TQs & ~Qualifiers::FastMask) && "non-fast qualifier bits set in mask!" ) ? static_cast<void> (0) : __assert_fail ("!(TQs & ~Qualifiers::FastMask) && \"non-fast qualifier bits set in mask!\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 853, __PRETTY_FUNCTION__)) | ||||||||
853 | && "non-fast qualifier bits set in mask!")((!(TQs & ~Qualifiers::FastMask) && "non-fast qualifier bits set in mask!" ) ? static_cast<void> (0) : __assert_fail ("!(TQs & ~Qualifiers::FastMask) && \"non-fast qualifier bits set in mask!\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 853, __PRETTY_FUNCTION__)); | ||||||||
854 | Value.setInt(Value.getInt() | TQs); | ||||||||
855 | } | ||||||||
856 | |||||||||
857 | void removeLocalConst(); | ||||||||
858 | void removeLocalVolatile(); | ||||||||
859 | void removeLocalRestrict(); | ||||||||
860 | void removeLocalCVRQualifiers(unsigned Mask); | ||||||||
861 | |||||||||
862 | void removeLocalFastQualifiers() { Value.setInt(0); } | ||||||||
863 | void removeLocalFastQualifiers(unsigned Mask) { | ||||||||
864 | assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers")((!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers" ) ? static_cast<void> (0) : __assert_fail ("!(Mask & ~Qualifiers::FastMask) && \"mask has non-fast qualifiers\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 864, __PRETTY_FUNCTION__)); | ||||||||
865 | Value.setInt(Value.getInt() & ~Mask); | ||||||||
866 | } | ||||||||
867 | |||||||||
868 | // Creates a type with the given qualifiers in addition to any | ||||||||
869 | // qualifiers already on this type. | ||||||||
870 | QualType withFastQualifiers(unsigned TQs) const { | ||||||||
871 | QualType T = *this; | ||||||||
872 | T.addFastQualifiers(TQs); | ||||||||
873 | return T; | ||||||||
874 | } | ||||||||
875 | |||||||||
876 | // Creates a type with exactly the given fast qualifiers, removing | ||||||||
877 | // any existing fast qualifiers. | ||||||||
878 | QualType withExactLocalFastQualifiers(unsigned TQs) const { | ||||||||
879 | return withoutLocalFastQualifiers().withFastQualifiers(TQs); | ||||||||
880 | } | ||||||||
881 | |||||||||
882 | // Removes fast qualifiers, but leaves any extended qualifiers in place. | ||||||||
883 | QualType withoutLocalFastQualifiers() const { | ||||||||
884 | QualType T = *this; | ||||||||
885 | T.removeLocalFastQualifiers(); | ||||||||
886 | return T; | ||||||||
887 | } | ||||||||
888 | |||||||||
889 | QualType getCanonicalType() const; | ||||||||
890 | |||||||||
891 | /// Return this type with all of the instance-specific qualifiers | ||||||||
892 | /// removed, but without removing any qualifiers that may have been applied | ||||||||
893 | /// through typedefs. | ||||||||
894 | QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); } | ||||||||
895 | |||||||||
896 | /// Retrieve the unqualified variant of the given type, | ||||||||
897 | /// removing as little sugar as possible. | ||||||||
898 | /// | ||||||||
899 | /// This routine looks through various kinds of sugar to find the | ||||||||
900 | /// least-desugared type that is unqualified. For example, given: | ||||||||
901 | /// | ||||||||
902 | /// \code | ||||||||
903 | /// typedef int Integer; | ||||||||
904 | /// typedef const Integer CInteger; | ||||||||
905 | /// typedef CInteger DifferenceType; | ||||||||
906 | /// \endcode | ||||||||
907 | /// | ||||||||
908 | /// Executing \c getUnqualifiedType() on the type \c DifferenceType will | ||||||||
909 | /// desugar until we hit the type \c Integer, which has no qualifiers on it. | ||||||||
910 | /// | ||||||||
911 | /// The resulting type might still be qualified if it's sugar for an array | ||||||||
912 | /// type. To strip qualifiers even from within a sugared array type, use | ||||||||
913 | /// ASTContext::getUnqualifiedArrayType. | ||||||||
914 | inline QualType getUnqualifiedType() const; | ||||||||
915 | |||||||||
916 | /// Retrieve the unqualified variant of the given type, removing as little | ||||||||
917 | /// sugar as possible. | ||||||||
918 | /// | ||||||||
919 | /// Like getUnqualifiedType(), but also returns the set of | ||||||||
920 | /// qualifiers that were built up. | ||||||||
921 | /// | ||||||||
922 | /// The resulting type might still be qualified if it's sugar for an array | ||||||||
923 | /// type. To strip qualifiers even from within a sugared array type, use | ||||||||
924 | /// ASTContext::getUnqualifiedArrayType. | ||||||||
925 | inline SplitQualType getSplitUnqualifiedType() const; | ||||||||
926 | |||||||||
927 | /// Determine whether this type is more qualified than the other | ||||||||
928 | /// given type, requiring exact equality for non-CVR qualifiers. | ||||||||
929 | bool isMoreQualifiedThan(QualType Other) const; | ||||||||
930 | |||||||||
931 | /// Determine whether this type is at least as qualified as the other | ||||||||
932 | /// given type, requiring exact equality for non-CVR qualifiers. | ||||||||
933 | bool isAtLeastAsQualifiedAs(QualType Other) const; | ||||||||
934 | |||||||||
935 | QualType getNonReferenceType() const; | ||||||||
936 | |||||||||
937 | /// Determine the type of a (typically non-lvalue) expression with the | ||||||||
938 | /// specified result type. | ||||||||
939 | /// | ||||||||
940 | /// This routine should be used for expressions for which the return type is | ||||||||
941 | /// explicitly specified (e.g., in a cast or call) and isn't necessarily | ||||||||
942 | /// an lvalue. It removes a top-level reference (since there are no | ||||||||
943 | /// expressions of reference type) and deletes top-level cvr-qualifiers | ||||||||
944 | /// from non-class types (in C++) or all types (in C). | ||||||||
945 | QualType getNonLValueExprType(const ASTContext &Context) const; | ||||||||
946 | |||||||||
947 | /// Return the specified type with any "sugar" removed from | ||||||||
948 | /// the type. This takes off typedefs, typeof's etc. If the outer level of | ||||||||
949 | /// the type is already concrete, it returns it unmodified. This is similar | ||||||||
950 | /// to getting the canonical type, but it doesn't remove *all* typedefs. For | ||||||||
951 | /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is | ||||||||
952 | /// concrete. | ||||||||
953 | /// | ||||||||
954 | /// Qualifiers are left in place. | ||||||||
955 | QualType getDesugaredType(const ASTContext &Context) const { | ||||||||
956 | return getDesugaredType(*this, Context); | ||||||||
957 | } | ||||||||
958 | |||||||||
959 | SplitQualType getSplitDesugaredType() const { | ||||||||
960 | return getSplitDesugaredType(*this); | ||||||||
961 | } | ||||||||
962 | |||||||||
963 | /// Return the specified type with one level of "sugar" removed from | ||||||||
964 | /// the type. | ||||||||
965 | /// | ||||||||
966 | /// This routine takes off the first typedef, typeof, etc. If the outer level | ||||||||
967 | /// of the type is already concrete, it returns it unmodified. | ||||||||
968 | QualType getSingleStepDesugaredType(const ASTContext &Context) const { | ||||||||
969 | return getSingleStepDesugaredTypeImpl(*this, Context); | ||||||||
970 | } | ||||||||
971 | |||||||||
972 | /// Returns the specified type after dropping any | ||||||||
973 | /// outer-level parentheses. | ||||||||
974 | QualType IgnoreParens() const { | ||||||||
975 | if (isa<ParenType>(*this)) | ||||||||
976 | return QualType::IgnoreParens(*this); | ||||||||
977 | return *this; | ||||||||
978 | } | ||||||||
979 | |||||||||
980 | /// Indicate whether the specified types and qualifiers are identical. | ||||||||
981 | friend bool operator==(const QualType &LHS, const QualType &RHS) { | ||||||||
982 | return LHS.Value == RHS.Value; | ||||||||
983 | } | ||||||||
984 | friend bool operator!=(const QualType &LHS, const QualType &RHS) { | ||||||||
985 | return LHS.Value != RHS.Value; | ||||||||
986 | } | ||||||||
987 | friend bool operator<(const QualType &LHS, const QualType &RHS) { | ||||||||
988 | return LHS.Value < RHS.Value; | ||||||||
989 | } | ||||||||
990 | |||||||||
991 | static std::string getAsString(SplitQualType split, | ||||||||
992 | const PrintingPolicy &Policy) { | ||||||||
993 | return getAsString(split.Ty, split.Quals, Policy); | ||||||||
994 | } | ||||||||
995 | static std::string getAsString(const Type *ty, Qualifiers qs, | ||||||||
996 | const PrintingPolicy &Policy); | ||||||||
997 | |||||||||
998 | std::string getAsString() const; | ||||||||
999 | std::string getAsString(const PrintingPolicy &Policy) const; | ||||||||
1000 | |||||||||
1001 | void print(raw_ostream &OS, const PrintingPolicy &Policy, | ||||||||
1002 | const Twine &PlaceHolder = Twine(), | ||||||||
1003 | unsigned Indentation = 0) const; | ||||||||
1004 | |||||||||
1005 | static void print(SplitQualType split, raw_ostream &OS, | ||||||||
1006 | const PrintingPolicy &policy, const Twine &PlaceHolder, | ||||||||
1007 | unsigned Indentation = 0) { | ||||||||
1008 | return print(split.Ty, split.Quals, OS, policy, PlaceHolder, Indentation); | ||||||||
1009 | } | ||||||||
1010 | |||||||||
1011 | static void print(const Type *ty, Qualifiers qs, | ||||||||
1012 | raw_ostream &OS, const PrintingPolicy &policy, | ||||||||
1013 | const Twine &PlaceHolder, | ||||||||
1014 | unsigned Indentation = 0); | ||||||||
1015 | |||||||||
1016 | void getAsStringInternal(std::string &Str, | ||||||||
1017 | const PrintingPolicy &Policy) const; | ||||||||
1018 | |||||||||
1019 | static void getAsStringInternal(SplitQualType split, std::string &out, | ||||||||
1020 | const PrintingPolicy &policy) { | ||||||||
1021 | return getAsStringInternal(split.Ty, split.Quals, out, policy); | ||||||||
1022 | } | ||||||||
1023 | |||||||||
1024 | static void getAsStringInternal(const Type *ty, Qualifiers qs, | ||||||||
1025 | std::string &out, | ||||||||
1026 | const PrintingPolicy &policy); | ||||||||
1027 | |||||||||
1028 | class StreamedQualTypeHelper { | ||||||||
1029 | const QualType &T; | ||||||||
1030 | const PrintingPolicy &Policy; | ||||||||
1031 | const Twine &PlaceHolder; | ||||||||
1032 | unsigned Indentation; | ||||||||
1033 | |||||||||
1034 | public: | ||||||||
1035 | StreamedQualTypeHelper(const QualType &T, const PrintingPolicy &Policy, | ||||||||
1036 | const Twine &PlaceHolder, unsigned Indentation) | ||||||||
1037 | : T(T), Policy(Policy), PlaceHolder(PlaceHolder), | ||||||||
1038 | Indentation(Indentation) {} | ||||||||
1039 | |||||||||
1040 | friend raw_ostream &operator<<(raw_ostream &OS, | ||||||||
1041 | const StreamedQualTypeHelper &SQT) { | ||||||||
1042 | SQT.T.print(OS, SQT.Policy, SQT.PlaceHolder, SQT.Indentation); | ||||||||
1043 | return OS; | ||||||||
1044 | } | ||||||||
1045 | }; | ||||||||
1046 | |||||||||
1047 | StreamedQualTypeHelper stream(const PrintingPolicy &Policy, | ||||||||
1048 | const Twine &PlaceHolder = Twine(), | ||||||||
1049 | unsigned Indentation = 0) const { | ||||||||
1050 | return StreamedQualTypeHelper(*this, Policy, PlaceHolder, Indentation); | ||||||||
1051 | } | ||||||||
1052 | |||||||||
1053 | void dump(const char *s) const; | ||||||||
1054 | void dump() const; | ||||||||
1055 | void dump(llvm::raw_ostream &OS) const; | ||||||||
1056 | |||||||||
1057 | void Profile(llvm::FoldingSetNodeID &ID) const { | ||||||||
1058 | ID.AddPointer(getAsOpaquePtr()); | ||||||||
1059 | } | ||||||||
1060 | |||||||||
1061 | /// Check if this type has any address space qualifier. | ||||||||
1062 | inline bool hasAddressSpace() const; | ||||||||
1063 | |||||||||
1064 | /// Return the address space of this type. | ||||||||
1065 | inline LangAS getAddressSpace() const; | ||||||||
1066 | |||||||||
1067 | /// Returns gc attribute of this type. | ||||||||
1068 | inline Qualifiers::GC getObjCGCAttr() const; | ||||||||
1069 | |||||||||
1070 | /// true when Type is objc's weak. | ||||||||
1071 | bool isObjCGCWeak() const { | ||||||||
1072 | return getObjCGCAttr() == Qualifiers::Weak; | ||||||||
1073 | } | ||||||||
1074 | |||||||||
1075 | /// true when Type is objc's strong. | ||||||||
1076 | bool isObjCGCStrong() const { | ||||||||
1077 | return getObjCGCAttr() == Qualifiers::Strong; | ||||||||
1078 | } | ||||||||
1079 | |||||||||
1080 | /// Returns lifetime attribute of this type. | ||||||||
1081 | Qualifiers::ObjCLifetime getObjCLifetime() const { | ||||||||
1082 | return getQualifiers().getObjCLifetime(); | ||||||||
1083 | } | ||||||||
1084 | |||||||||
1085 | bool hasNonTrivialObjCLifetime() const { | ||||||||
1086 | return getQualifiers().hasNonTrivialObjCLifetime(); | ||||||||
1087 | } | ||||||||
1088 | |||||||||
1089 | bool hasStrongOrWeakObjCLifetime() const { | ||||||||
1090 | return getQualifiers().hasStrongOrWeakObjCLifetime(); | ||||||||
1091 | } | ||||||||
1092 | |||||||||
1093 | // true when Type is objc's weak and weak is enabled but ARC isn't. | ||||||||
1094 | bool isNonWeakInMRRWithObjCWeak(const ASTContext &Context) const; | ||||||||
1095 | |||||||||
1096 | enum PrimitiveDefaultInitializeKind { | ||||||||
1097 | /// The type does not fall into any of the following categories. Note that | ||||||||
1098 | /// this case is zero-valued so that values of this enum can be used as a | ||||||||
1099 | /// boolean condition for non-triviality. | ||||||||
1100 | PDIK_Trivial, | ||||||||
1101 | |||||||||
1102 | /// The type is an Objective-C retainable pointer type that is qualified | ||||||||
1103 | /// with the ARC __strong qualifier. | ||||||||
1104 | PDIK_ARCStrong, | ||||||||
1105 | |||||||||
1106 | /// The type is an Objective-C retainable pointer type that is qualified | ||||||||
1107 | /// with the ARC __weak qualifier. | ||||||||
1108 | PDIK_ARCWeak, | ||||||||
1109 | |||||||||
1110 | /// The type is a struct containing a field whose type is not PCK_Trivial. | ||||||||
1111 | PDIK_Struct | ||||||||
1112 | }; | ||||||||
1113 | |||||||||
1114 | /// Functions to query basic properties of non-trivial C struct types. | ||||||||
1115 | |||||||||
1116 | /// Check if this is a non-trivial type that would cause a C struct | ||||||||
1117 | /// transitively containing this type to be non-trivial to default initialize | ||||||||
1118 | /// and return the kind. | ||||||||
1119 | PrimitiveDefaultInitializeKind | ||||||||
1120 | isNonTrivialToPrimitiveDefaultInitialize() const; | ||||||||
1121 | |||||||||
1122 | enum PrimitiveCopyKind { | ||||||||
1123 | /// The type does not fall into any of the following categories. Note that | ||||||||
1124 | /// this case is zero-valued so that values of this enum can be used as a | ||||||||
1125 | /// boolean condition for non-triviality. | ||||||||
1126 | PCK_Trivial, | ||||||||
1127 | |||||||||
1128 | /// The type would be trivial except that it is volatile-qualified. Types | ||||||||
1129 | /// that fall into one of the other non-trivial cases may additionally be | ||||||||
1130 | /// volatile-qualified. | ||||||||
1131 | PCK_VolatileTrivial, | ||||||||
1132 | |||||||||
1133 | /// The type is an Objective-C retainable pointer type that is qualified | ||||||||
1134 | /// with the ARC __strong qualifier. | ||||||||
1135 | PCK_ARCStrong, | ||||||||
1136 | |||||||||
1137 | /// The type is an Objective-C retainable pointer type that is qualified | ||||||||
1138 | /// with the ARC __weak qualifier. | ||||||||
1139 | PCK_ARCWeak, | ||||||||
1140 | |||||||||
1141 | /// The type is a struct containing a field whose type is neither | ||||||||
1142 | /// PCK_Trivial nor PCK_VolatileTrivial. | ||||||||
1143 | /// Note that a C++ struct type does not necessarily match this; C++ copying | ||||||||
1144 | /// semantics are too complex to express here, in part because they depend | ||||||||
1145 | /// on the exact constructor or assignment operator that is chosen by | ||||||||
1146 | /// overload resolution to do the copy. | ||||||||
1147 | PCK_Struct | ||||||||
1148 | }; | ||||||||
1149 | |||||||||
1150 | /// Check if this is a non-trivial type that would cause a C struct | ||||||||
1151 | /// transitively containing this type to be non-trivial to copy and return the | ||||||||
1152 | /// kind. | ||||||||
1153 | PrimitiveCopyKind isNonTrivialToPrimitiveCopy() const; | ||||||||
1154 | |||||||||
1155 | /// Check if this is a non-trivial type that would cause a C struct | ||||||||
1156 | /// transitively containing this type to be non-trivial to destructively | ||||||||
1157 | /// move and return the kind. Destructive move in this context is a C++-style | ||||||||
1158 | /// move in which the source object is placed in a valid but unspecified state | ||||||||
1159 | /// after it is moved, as opposed to a truly destructive move in which the | ||||||||
1160 | /// source object is placed in an uninitialized state. | ||||||||
1161 | PrimitiveCopyKind isNonTrivialToPrimitiveDestructiveMove() const; | ||||||||
1162 | |||||||||
1163 | enum DestructionKind { | ||||||||
1164 | DK_none, | ||||||||
1165 | DK_cxx_destructor, | ||||||||
1166 | DK_objc_strong_lifetime, | ||||||||
1167 | DK_objc_weak_lifetime, | ||||||||
1168 | DK_nontrivial_c_struct | ||||||||
1169 | }; | ||||||||
1170 | |||||||||
1171 | /// Returns a nonzero value if objects of this type require | ||||||||
1172 | /// non-trivial work to clean up after. Non-zero because it's | ||||||||
1173 | /// conceivable that qualifiers (objc_gc(weak)?) could make | ||||||||
1174 | /// something require destruction. | ||||||||
1175 | DestructionKind isDestructedType() const { | ||||||||
1176 | return isDestructedTypeImpl(*this); | ||||||||
1177 | } | ||||||||
1178 | |||||||||
1179 | /// Check if this is or contains a C union that is non-trivial to | ||||||||
1180 | /// default-initialize, which is a union that has a member that is non-trivial | ||||||||
1181 | /// to default-initialize. If this returns true, | ||||||||
1182 | /// isNonTrivialToPrimitiveDefaultInitialize returns PDIK_Struct. | ||||||||
1183 | bool hasNonTrivialToPrimitiveDefaultInitializeCUnion() const; | ||||||||
1184 | |||||||||
1185 | /// Check if this is or contains a C union that is non-trivial to destruct, | ||||||||
1186 | /// which is a union that has a member that is non-trivial to destruct. If | ||||||||
1187 | /// this returns true, isDestructedType returns DK_nontrivial_c_struct. | ||||||||
1188 | bool hasNonTrivialToPrimitiveDestructCUnion() const; | ||||||||
1189 | |||||||||
1190 | /// Check if this is or contains a C union that is non-trivial to copy, which | ||||||||
1191 | /// is a union that has a member that is non-trivial to copy. If this returns | ||||||||
1192 | /// true, isNonTrivialToPrimitiveCopy returns PCK_Struct. | ||||||||
1193 | bool hasNonTrivialToPrimitiveCopyCUnion() const; | ||||||||
1194 | |||||||||
1195 | /// Determine whether expressions of the given type are forbidden | ||||||||
1196 | /// from being lvalues in C. | ||||||||
1197 | /// | ||||||||
1198 | /// The expression types that are forbidden to be lvalues are: | ||||||||
1199 | /// - 'void', but not qualified void | ||||||||
1200 | /// - function types | ||||||||
1201 | /// | ||||||||
1202 | /// The exact rule here is C99 6.3.2.1: | ||||||||
1203 | /// An lvalue is an expression with an object type or an incomplete | ||||||||
1204 | /// type other than void. | ||||||||
1205 | bool isCForbiddenLValueType() const; | ||||||||
1206 | |||||||||
1207 | /// Substitute type arguments for the Objective-C type parameters used in the | ||||||||
1208 | /// subject type. | ||||||||
1209 | /// | ||||||||
1210 | /// \param ctx ASTContext in which the type exists. | ||||||||
1211 | /// | ||||||||
1212 | /// \param typeArgs The type arguments that will be substituted for the | ||||||||
1213 | /// Objective-C type parameters in the subject type, which are generally | ||||||||
1214 | /// computed via \c Type::getObjCSubstitutions. If empty, the type | ||||||||
1215 | /// parameters will be replaced with their bounds or id/Class, as appropriate | ||||||||
1216 | /// for the context. | ||||||||
1217 | /// | ||||||||
1218 | /// \param context The context in which the subject type was written. | ||||||||
1219 | /// | ||||||||
1220 | /// \returns the resulting type. | ||||||||
1221 | QualType substObjCTypeArgs(ASTContext &ctx, | ||||||||
1222 | ArrayRef<QualType> typeArgs, | ||||||||
1223 | ObjCSubstitutionContext context) const; | ||||||||
1224 | |||||||||
1225 | /// Substitute type arguments from an object type for the Objective-C type | ||||||||
1226 | /// parameters used in the subject type. | ||||||||
1227 | /// | ||||||||
1228 | /// This operation combines the computation of type arguments for | ||||||||
1229 | /// substitution (\c Type::getObjCSubstitutions) with the actual process of | ||||||||
1230 | /// substitution (\c QualType::substObjCTypeArgs) for the convenience of | ||||||||
1231 | /// callers that need to perform a single substitution in isolation. | ||||||||
1232 | /// | ||||||||
1233 | /// \param objectType The type of the object whose member type we're | ||||||||
1234 | /// substituting into. For example, this might be the receiver of a message | ||||||||
1235 | /// or the base of a property access. | ||||||||
1236 | /// | ||||||||
1237 | /// \param dc The declaration context from which the subject type was | ||||||||
1238 | /// retrieved, which indicates (for example) which type parameters should | ||||||||
1239 | /// be substituted. | ||||||||
1240 | /// | ||||||||
1241 | /// \param context The context in which the subject type was written. | ||||||||
1242 | /// | ||||||||
1243 | /// \returns the subject type after replacing all of the Objective-C type | ||||||||
1244 | /// parameters with their corresponding arguments. | ||||||||
1245 | QualType substObjCMemberType(QualType objectType, | ||||||||
1246 | const DeclContext *dc, | ||||||||
1247 | ObjCSubstitutionContext context) const; | ||||||||
1248 | |||||||||
1249 | /// Strip Objective-C "__kindof" types from the given type. | ||||||||
1250 | QualType stripObjCKindOfType(const ASTContext &ctx) const; | ||||||||
1251 | |||||||||
1252 | /// Remove all qualifiers including _Atomic. | ||||||||
1253 | QualType getAtomicUnqualifiedType() const; | ||||||||
1254 | |||||||||
1255 | private: | ||||||||
1256 | // These methods are implemented in a separate translation unit; | ||||||||
1257 | // "static"-ize them to avoid creating temporary QualTypes in the | ||||||||
1258 | // caller. | ||||||||
1259 | static bool isConstant(QualType T, const ASTContext& Ctx); | ||||||||
1260 | static QualType getDesugaredType(QualType T, const ASTContext &Context); | ||||||||
1261 | static SplitQualType getSplitDesugaredType(QualType T); | ||||||||
1262 | static SplitQualType getSplitUnqualifiedTypeImpl(QualType type); | ||||||||
1263 | static QualType getSingleStepDesugaredTypeImpl(QualType type, | ||||||||
1264 | const ASTContext &C); | ||||||||
1265 | static QualType IgnoreParens(QualType T); | ||||||||
1266 | static DestructionKind isDestructedTypeImpl(QualType type); | ||||||||
1267 | |||||||||
1268 | /// Check if \param RD is or contains a non-trivial C union. | ||||||||
1269 | static bool hasNonTrivialToPrimitiveDefaultInitializeCUnion(const RecordDecl *RD); | ||||||||
1270 | static bool hasNonTrivialToPrimitiveDestructCUnion(const RecordDecl *RD); | ||||||||
1271 | static bool hasNonTrivialToPrimitiveCopyCUnion(const RecordDecl *RD); | ||||||||
1272 | }; | ||||||||
1273 | |||||||||
1274 | } // namespace clang | ||||||||
1275 | |||||||||
1276 | namespace llvm { | ||||||||
1277 | |||||||||
1278 | /// Implement simplify_type for QualType, so that we can dyn_cast from QualType | ||||||||
1279 | /// to a specific Type class. | ||||||||
1280 | template<> struct simplify_type< ::clang::QualType> { | ||||||||
1281 | using SimpleType = const ::clang::Type *; | ||||||||
1282 | |||||||||
1283 | static SimpleType getSimplifiedValue(::clang::QualType Val) { | ||||||||
1284 | return Val.getTypePtr(); | ||||||||
1285 | } | ||||||||
1286 | }; | ||||||||
1287 | |||||||||
1288 | // Teach SmallPtrSet that QualType is "basically a pointer". | ||||||||
1289 | template<> | ||||||||
1290 | struct PointerLikeTypeTraits<clang::QualType> { | ||||||||
1291 | static inline void *getAsVoidPointer(clang::QualType P) { | ||||||||
1292 | return P.getAsOpaquePtr(); | ||||||||
1293 | } | ||||||||
1294 | |||||||||
1295 | static inline clang::QualType getFromVoidPointer(void *P) { | ||||||||
1296 | return clang::QualType::getFromOpaquePtr(P); | ||||||||
1297 | } | ||||||||
1298 | |||||||||
1299 | // Various qualifiers go in low bits. | ||||||||
1300 | static constexpr int NumLowBitsAvailable = 0; | ||||||||
1301 | }; | ||||||||
1302 | |||||||||
1303 | } // namespace llvm | ||||||||
1304 | |||||||||
1305 | namespace clang { | ||||||||
1306 | |||||||||
1307 | /// Base class that is common to both the \c ExtQuals and \c Type | ||||||||
1308 | /// classes, which allows \c QualType to access the common fields between the | ||||||||
1309 | /// two. | ||||||||
1310 | class ExtQualsTypeCommonBase { | ||||||||
1311 | friend class ExtQuals; | ||||||||
1312 | friend class QualType; | ||||||||
1313 | friend class Type; | ||||||||
1314 | |||||||||
1315 | /// The "base" type of an extended qualifiers type (\c ExtQuals) or | ||||||||
1316 | /// a self-referential pointer (for \c Type). | ||||||||
1317 | /// | ||||||||
1318 | /// This pointer allows an efficient mapping from a QualType to its | ||||||||
1319 | /// underlying type pointer. | ||||||||
1320 | const Type *const BaseType; | ||||||||
1321 | |||||||||
1322 | /// The canonical type of this type. A QualType. | ||||||||
1323 | QualType CanonicalType; | ||||||||
1324 | |||||||||
1325 | ExtQualsTypeCommonBase(const Type *baseType, QualType canon) | ||||||||
1326 | : BaseType(baseType), CanonicalType(canon) {} | ||||||||
1327 | }; | ||||||||
1328 | |||||||||
1329 | /// We can encode up to four bits in the low bits of a | ||||||||
1330 | /// type pointer, but there are many more type qualifiers that we want | ||||||||
1331 | /// to be able to apply to an arbitrary type. Therefore we have this | ||||||||
1332 | /// struct, intended to be heap-allocated and used by QualType to | ||||||||
1333 | /// store qualifiers. | ||||||||
1334 | /// | ||||||||
1335 | /// The current design tags the 'const', 'restrict', and 'volatile' qualifiers | ||||||||
1336 | /// in three low bits on the QualType pointer; a fourth bit records whether | ||||||||
1337 | /// the pointer is an ExtQuals node. The extended qualifiers (address spaces, | ||||||||
1338 | /// Objective-C GC attributes) are much more rare. | ||||||||
1339 | class ExtQuals : public ExtQualsTypeCommonBase, public llvm::FoldingSetNode { | ||||||||
1340 | // NOTE: changing the fast qualifiers should be straightforward as | ||||||||
1341 | // long as you don't make 'const' non-fast. | ||||||||
1342 | // 1. Qualifiers: | ||||||||
1343 | // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). | ||||||||
1344 | // Fast qualifiers must occupy the low-order bits. | ||||||||
1345 | // b) Update Qualifiers::FastWidth and FastMask. | ||||||||
1346 | // 2. QualType: | ||||||||
1347 | // a) Update is{Volatile,Restrict}Qualified(), defined inline. | ||||||||
1348 | // b) Update remove{Volatile,Restrict}, defined near the end of | ||||||||
1349 | // this header. | ||||||||
1350 | // 3. ASTContext: | ||||||||
1351 | // a) Update get{Volatile,Restrict}Type. | ||||||||
1352 | |||||||||
1353 | /// The immutable set of qualifiers applied by this node. Always contains | ||||||||
1354 | /// extended qualifiers. | ||||||||
1355 | Qualifiers Quals; | ||||||||
1356 | |||||||||
1357 | ExtQuals *this_() { return this; } | ||||||||
1358 | |||||||||
1359 | public: | ||||||||
1360 | ExtQuals(const Type *baseType, QualType canon, Qualifiers quals) | ||||||||
1361 | : ExtQualsTypeCommonBase(baseType, | ||||||||
1362 | canon.isNull() ? QualType(this_(), 0) : canon), | ||||||||
1363 | Quals(quals) { | ||||||||
1364 | assert(Quals.hasNonFastQualifiers()((Quals.hasNonFastQualifiers() && "ExtQuals created with no fast qualifiers" ) ? static_cast<void> (0) : __assert_fail ("Quals.hasNonFastQualifiers() && \"ExtQuals created with no fast qualifiers\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 1365, __PRETTY_FUNCTION__)) | ||||||||
1365 | && "ExtQuals created with no fast qualifiers")((Quals.hasNonFastQualifiers() && "ExtQuals created with no fast qualifiers" ) ? static_cast<void> (0) : __assert_fail ("Quals.hasNonFastQualifiers() && \"ExtQuals created with no fast qualifiers\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 1365, __PRETTY_FUNCTION__)); | ||||||||
1366 | assert(!Quals.hasFastQualifiers()((!Quals.hasFastQualifiers() && "ExtQuals created with fast qualifiers" ) ? static_cast<void> (0) : __assert_fail ("!Quals.hasFastQualifiers() && \"ExtQuals created with fast qualifiers\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 1367, __PRETTY_FUNCTION__)) | ||||||||
1367 | && "ExtQuals created with fast qualifiers")((!Quals.hasFastQualifiers() && "ExtQuals created with fast qualifiers" ) ? static_cast<void> (0) : __assert_fail ("!Quals.hasFastQualifiers() && \"ExtQuals created with fast qualifiers\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 1367, __PRETTY_FUNCTION__)); | ||||||||
1368 | } | ||||||||
1369 | |||||||||
1370 | Qualifiers getQualifiers() const { return Quals; } | ||||||||
1371 | |||||||||
1372 | bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } | ||||||||
1373 | Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } | ||||||||
1374 | |||||||||
1375 | bool hasObjCLifetime() const { return Quals.hasObjCLifetime(); } | ||||||||
1376 | Qualifiers::ObjCLifetime getObjCLifetime() const { | ||||||||
1377 | return Quals.getObjCLifetime(); | ||||||||
1378 | } | ||||||||
1379 | |||||||||
1380 | bool hasAddressSpace() const { return Quals.hasAddressSpace(); } | ||||||||
1381 | LangAS getAddressSpace() const { return Quals.getAddressSpace(); } | ||||||||
1382 | |||||||||
1383 | const Type *getBaseType() const { return BaseType; } | ||||||||
1384 | |||||||||
1385 | public: | ||||||||
1386 | void Profile(llvm::FoldingSetNodeID &ID) const { | ||||||||
1387 | Profile(ID, getBaseType(), Quals); | ||||||||
1388 | } | ||||||||
1389 | |||||||||
1390 | static void Profile(llvm::FoldingSetNodeID &ID, | ||||||||
1391 | const Type *BaseType, | ||||||||
1392 | Qualifiers Quals) { | ||||||||
1393 | assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!")((!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!" ) ? static_cast<void> (0) : __assert_fail ("!Quals.hasFastQualifiers() && \"fast qualifiers in ExtQuals hash!\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 1393, __PRETTY_FUNCTION__)); | ||||||||
1394 | ID.AddPointer(BaseType); | ||||||||
1395 | Quals.Profile(ID); | ||||||||
1396 | } | ||||||||
1397 | }; | ||||||||
1398 | |||||||||
1399 | /// The kind of C++11 ref-qualifier associated with a function type. | ||||||||
1400 | /// This determines whether a member function's "this" object can be an | ||||||||
1401 | /// lvalue, rvalue, or neither. | ||||||||
1402 | enum RefQualifierKind { | ||||||||
1403 | /// No ref-qualifier was provided. | ||||||||
1404 | RQ_None = 0, | ||||||||
1405 | |||||||||
1406 | /// An lvalue ref-qualifier was provided (\c &). | ||||||||
1407 | RQ_LValue, | ||||||||
1408 | |||||||||
1409 | /// An rvalue ref-qualifier was provided (\c &&). | ||||||||
1410 | RQ_RValue | ||||||||
1411 | }; | ||||||||
1412 | |||||||||
1413 | /// Which keyword(s) were used to create an AutoType. | ||||||||
1414 | enum class AutoTypeKeyword { | ||||||||
1415 | /// auto | ||||||||
1416 | Auto, | ||||||||
1417 | |||||||||
1418 | /// decltype(auto) | ||||||||
1419 | DecltypeAuto, | ||||||||
1420 | |||||||||
1421 | /// __auto_type (GNU extension) | ||||||||
1422 | GNUAutoType | ||||||||
1423 | }; | ||||||||
1424 | |||||||||
1425 | /// The base class of the type hierarchy. | ||||||||
1426 | /// | ||||||||
1427 | /// A central concept with types is that each type always has a canonical | ||||||||
1428 | /// type. A canonical type is the type with any typedef names stripped out | ||||||||
1429 | /// of it or the types it references. For example, consider: | ||||||||
1430 | /// | ||||||||
1431 | /// typedef int foo; | ||||||||
1432 | /// typedef foo* bar; | ||||||||
1433 | /// 'int *' 'foo *' 'bar' | ||||||||
1434 | /// | ||||||||
1435 | /// There will be a Type object created for 'int'. Since int is canonical, its | ||||||||
1436 | /// CanonicalType pointer points to itself. There is also a Type for 'foo' (a | ||||||||
1437 | /// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next | ||||||||
1438 | /// there is a PointerType that represents 'int*', which, like 'int', is | ||||||||
1439 | /// canonical. Finally, there is a PointerType type for 'foo*' whose canonical | ||||||||
1440 | /// type is 'int*', and there is a TypedefType for 'bar', whose canonical type | ||||||||
1441 | /// is also 'int*'. | ||||||||
1442 | /// | ||||||||
1443 | /// Non-canonical types are useful for emitting diagnostics, without losing | ||||||||
1444 | /// information about typedefs being used. Canonical types are useful for type | ||||||||
1445 | /// comparisons (they allow by-pointer equality tests) and useful for reasoning | ||||||||
1446 | /// about whether something has a particular form (e.g. is a function type), | ||||||||
1447 | /// because they implicitly, recursively, strip all typedefs out of a type. | ||||||||
1448 | /// | ||||||||
1449 | /// Types, once created, are immutable. | ||||||||
1450 | /// | ||||||||
1451 | class alignas(8) Type : public ExtQualsTypeCommonBase { | ||||||||
1452 | public: | ||||||||
1453 | enum TypeClass { | ||||||||
1454 | #define TYPE(Class, Base) Class, | ||||||||
1455 | #define LAST_TYPE(Class) TypeLast = Class | ||||||||
1456 | #define ABSTRACT_TYPE(Class, Base) | ||||||||
1457 | #include "clang/AST/TypeNodes.inc" | ||||||||
1458 | }; | ||||||||
1459 | |||||||||
1460 | private: | ||||||||
1461 | /// Bitfields required by the Type class. | ||||||||
1462 | class TypeBitfields { | ||||||||
1463 | friend class Type; | ||||||||
1464 | template <class T> friend class TypePropertyCache; | ||||||||
1465 | |||||||||
1466 | /// TypeClass bitfield - Enum that specifies what subclass this belongs to. | ||||||||
1467 | unsigned TC : 8; | ||||||||
1468 | |||||||||
1469 | /// Store information on the type dependency. | ||||||||
1470 | /*TypeDependence*/ unsigned Dependence : TypeDependenceBits; | ||||||||
1471 | |||||||||
1472 | /// True if the cache (i.e. the bitfields here starting with | ||||||||
1473 | /// 'Cache') is valid. | ||||||||
1474 | mutable unsigned CacheValid : 1; | ||||||||
1475 | |||||||||
1476 | /// Linkage of this type. | ||||||||
1477 | mutable unsigned CachedLinkage : 3; | ||||||||
1478 | |||||||||
1479 | /// Whether this type involves and local or unnamed types. | ||||||||
1480 | mutable unsigned CachedLocalOrUnnamed : 1; | ||||||||
1481 | |||||||||
1482 | /// Whether this type comes from an AST file. | ||||||||
1483 | mutable unsigned FromAST : 1; | ||||||||
1484 | |||||||||
1485 | bool isCacheValid() const { | ||||||||
1486 | return CacheValid; | ||||||||
1487 | } | ||||||||
1488 | |||||||||
1489 | Linkage getLinkage() const { | ||||||||
1490 | assert(isCacheValid() && "getting linkage from invalid cache")((isCacheValid() && "getting linkage from invalid cache" ) ? static_cast<void> (0) : __assert_fail ("isCacheValid() && \"getting linkage from invalid cache\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 1490, __PRETTY_FUNCTION__)); | ||||||||
1491 | return static_cast<Linkage>(CachedLinkage); | ||||||||
1492 | } | ||||||||
1493 | |||||||||
1494 | bool hasLocalOrUnnamedType() const { | ||||||||
1495 | assert(isCacheValid() && "getting linkage from invalid cache")((isCacheValid() && "getting linkage from invalid cache" ) ? static_cast<void> (0) : __assert_fail ("isCacheValid() && \"getting linkage from invalid cache\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 1495, __PRETTY_FUNCTION__)); | ||||||||
1496 | return CachedLocalOrUnnamed; | ||||||||
1497 | } | ||||||||
1498 | }; | ||||||||
1499 | enum { NumTypeBits = 18 }; | ||||||||
1500 | |||||||||
1501 | protected: | ||||||||
1502 | // These classes allow subclasses to somewhat cleanly pack bitfields | ||||||||
1503 | // into Type. | ||||||||
1504 | |||||||||
1505 | class ArrayTypeBitfields { | ||||||||
1506 | friend class ArrayType; | ||||||||
1507 | |||||||||
1508 | unsigned : NumTypeBits; | ||||||||
1509 | |||||||||
1510 | /// CVR qualifiers from declarations like | ||||||||
1511 | /// 'int X[static restrict 4]'. For function parameters only. | ||||||||
1512 | unsigned IndexTypeQuals : 3; | ||||||||
1513 | |||||||||
1514 | /// Storage class qualifiers from declarations like | ||||||||
1515 | /// 'int X[static restrict 4]'. For function parameters only. | ||||||||
1516 | /// Actually an ArrayType::ArraySizeModifier. | ||||||||
1517 | unsigned SizeModifier : 3; | ||||||||
1518 | }; | ||||||||
1519 | |||||||||
1520 | class ConstantArrayTypeBitfields { | ||||||||
1521 | friend class ConstantArrayType; | ||||||||
1522 | |||||||||
1523 | unsigned : NumTypeBits + 3 + 3; | ||||||||
1524 | |||||||||
1525 | /// Whether we have a stored size expression. | ||||||||
1526 | unsigned HasStoredSizeExpr : 1; | ||||||||
1527 | }; | ||||||||
1528 | |||||||||
1529 | class BuiltinTypeBitfields { | ||||||||
1530 | friend class BuiltinType; | ||||||||
1531 | |||||||||
1532 | unsigned : NumTypeBits; | ||||||||
1533 | |||||||||
1534 | /// The kind (BuiltinType::Kind) of builtin type this is. | ||||||||
1535 | unsigned Kind : 8; | ||||||||
1536 | }; | ||||||||
1537 | |||||||||
1538 | /// FunctionTypeBitfields store various bits belonging to FunctionProtoType. | ||||||||
1539 | /// Only common bits are stored here. Additional uncommon bits are stored | ||||||||
1540 | /// in a trailing object after FunctionProtoType. | ||||||||
1541 | class FunctionTypeBitfields { | ||||||||
1542 | friend class FunctionProtoType; | ||||||||
1543 | friend class FunctionType; | ||||||||
1544 | |||||||||
1545 | unsigned : NumTypeBits; | ||||||||
1546 | |||||||||
1547 | /// Extra information which affects how the function is called, like | ||||||||
1548 | /// regparm and the calling convention. | ||||||||
1549 | unsigned ExtInfo : 12; | ||||||||
1550 | |||||||||
1551 | /// The ref-qualifier associated with a \c FunctionProtoType. | ||||||||
1552 | /// | ||||||||
1553 | /// This is a value of type \c RefQualifierKind. | ||||||||
1554 | unsigned RefQualifier : 2; | ||||||||
1555 | |||||||||
1556 | /// Used only by FunctionProtoType, put here to pack with the | ||||||||
1557 | /// other bitfields. | ||||||||
1558 | /// The qualifiers are part of FunctionProtoType because... | ||||||||
1559 | /// | ||||||||
1560 | /// C++ 8.3.5p4: The return type, the parameter type list and the | ||||||||
1561 | /// cv-qualifier-seq, [...], are part of the function type. | ||||||||
1562 | unsigned FastTypeQuals : Qualifiers::FastWidth; | ||||||||
1563 | /// Whether this function has extended Qualifiers. | ||||||||
1564 | unsigned HasExtQuals : 1; | ||||||||
1565 | |||||||||
1566 | /// The number of parameters this function has, not counting '...'. | ||||||||
1567 | /// According to [implimits] 8 bits should be enough here but this is | ||||||||
1568 | /// somewhat easy to exceed with metaprogramming and so we would like to | ||||||||
1569 | /// keep NumParams as wide as reasonably possible. | ||||||||
1570 | unsigned NumParams : 16; | ||||||||
1571 | |||||||||
1572 | /// The type of exception specification this function has. | ||||||||
1573 | unsigned ExceptionSpecType : 4; | ||||||||
1574 | |||||||||
1575 | /// Whether this function has extended parameter information. | ||||||||
1576 | unsigned HasExtParameterInfos : 1; | ||||||||
1577 | |||||||||
1578 | /// Whether the function is variadic. | ||||||||
1579 | unsigned Variadic : 1; | ||||||||
1580 | |||||||||
1581 | /// Whether this function has a trailing return type. | ||||||||
1582 | unsigned HasTrailingReturn : 1; | ||||||||
1583 | }; | ||||||||
1584 | |||||||||
1585 | class ObjCObjectTypeBitfields { | ||||||||
1586 | friend class ObjCObjectType; | ||||||||
1587 | |||||||||
1588 | unsigned : NumTypeBits; | ||||||||
1589 | |||||||||
1590 | /// The number of type arguments stored directly on this object type. | ||||||||
1591 | unsigned NumTypeArgs : 7; | ||||||||
1592 | |||||||||
1593 | /// The number of protocols stored directly on this object type. | ||||||||
1594 | unsigned NumProtocols : 6; | ||||||||
1595 | |||||||||
1596 | /// Whether this is a "kindof" type. | ||||||||
1597 | unsigned IsKindOf : 1; | ||||||||
1598 | }; | ||||||||
1599 | |||||||||
1600 | class ReferenceTypeBitfields { | ||||||||
1601 | friend class ReferenceType; | ||||||||
1602 | |||||||||
1603 | unsigned : NumTypeBits; | ||||||||
1604 | |||||||||
1605 | /// True if the type was originally spelled with an lvalue sigil. | ||||||||
1606 | /// This is never true of rvalue references but can also be false | ||||||||
1607 | /// on lvalue references because of C++0x [dcl.typedef]p9, | ||||||||
1608 | /// as follows: | ||||||||
1609 | /// | ||||||||
1610 | /// typedef int &ref; // lvalue, spelled lvalue | ||||||||
1611 | /// typedef int &&rvref; // rvalue | ||||||||
1612 | /// ref &a; // lvalue, inner ref, spelled lvalue | ||||||||
1613 | /// ref &&a; // lvalue, inner ref | ||||||||
1614 | /// rvref &a; // lvalue, inner ref, spelled lvalue | ||||||||
1615 | /// rvref &&a; // rvalue, inner ref | ||||||||
1616 | unsigned SpelledAsLValue : 1; | ||||||||
1617 | |||||||||
1618 | /// True if the inner type is a reference type. This only happens | ||||||||
1619 | /// in non-canonical forms. | ||||||||
1620 | unsigned InnerRef : 1; | ||||||||
1621 | }; | ||||||||
1622 | |||||||||
1623 | class TypeWithKeywordBitfields { | ||||||||
1624 | friend class TypeWithKeyword; | ||||||||
1625 | |||||||||
1626 | unsigned : NumTypeBits; | ||||||||
1627 | |||||||||
1628 | /// An ElaboratedTypeKeyword. 8 bits for efficient access. | ||||||||
1629 | unsigned Keyword : 8; | ||||||||
1630 | }; | ||||||||
1631 | |||||||||
1632 | enum { NumTypeWithKeywordBits = 8 }; | ||||||||
1633 | |||||||||
1634 | class ElaboratedTypeBitfields { | ||||||||
1635 | friend class ElaboratedType; | ||||||||
1636 | |||||||||
1637 | unsigned : NumTypeBits; | ||||||||
1638 | unsigned : NumTypeWithKeywordBits; | ||||||||
1639 | |||||||||
1640 | /// Whether the ElaboratedType has a trailing OwnedTagDecl. | ||||||||
1641 | unsigned HasOwnedTagDecl : 1; | ||||||||
1642 | }; | ||||||||
1643 | |||||||||
1644 | class VectorTypeBitfields { | ||||||||
1645 | friend class VectorType; | ||||||||
1646 | friend class DependentVectorType; | ||||||||
1647 | |||||||||
1648 | unsigned : NumTypeBits; | ||||||||
1649 | |||||||||
1650 | /// The kind of vector, either a generic vector type or some | ||||||||
1651 | /// target-specific vector type such as for AltiVec or Neon. | ||||||||
1652 | unsigned VecKind : 3; | ||||||||
1653 | |||||||||
1654 | /// The number of elements in the vector. | ||||||||
1655 | unsigned NumElements : 29 - NumTypeBits; | ||||||||
1656 | |||||||||
1657 | enum { MaxNumElements = (1 << (29 - NumTypeBits)) - 1 }; | ||||||||
1658 | }; | ||||||||
1659 | |||||||||
1660 | class AttributedTypeBitfields { | ||||||||
1661 | friend class AttributedType; | ||||||||
1662 | |||||||||
1663 | unsigned : NumTypeBits; | ||||||||
1664 | |||||||||
1665 | /// An AttributedType::Kind | ||||||||
1666 | unsigned AttrKind : 32 - NumTypeBits; | ||||||||
1667 | }; | ||||||||
1668 | |||||||||
1669 | class AutoTypeBitfields { | ||||||||
1670 | friend class AutoType; | ||||||||
1671 | |||||||||
1672 | unsigned : NumTypeBits; | ||||||||
1673 | |||||||||
1674 | /// Was this placeholder type spelled as 'auto', 'decltype(auto)', | ||||||||
1675 | /// or '__auto_type'? AutoTypeKeyword value. | ||||||||
1676 | unsigned Keyword : 2; | ||||||||
1677 | |||||||||
1678 | /// The number of template arguments in the type-constraints, which is | ||||||||
1679 | /// expected to be able to hold at least 1024 according to [implimits]. | ||||||||
1680 | /// However as this limit is somewhat easy to hit with template | ||||||||
1681 | /// metaprogramming we'd prefer to keep it as large as possible. | ||||||||
1682 | /// At the moment it has been left as a non-bitfield since this type | ||||||||
1683 | /// safely fits in 64 bits as an unsigned, so there is no reason to | ||||||||
1684 | /// introduce the performance impact of a bitfield. | ||||||||
1685 | unsigned NumArgs; | ||||||||
1686 | }; | ||||||||
1687 | |||||||||
1688 | class SubstTemplateTypeParmPackTypeBitfields { | ||||||||
1689 | friend class SubstTemplateTypeParmPackType; | ||||||||
1690 | |||||||||
1691 | unsigned : NumTypeBits; | ||||||||
1692 | |||||||||
1693 | /// The number of template arguments in \c Arguments, which is | ||||||||
1694 | /// expected to be able to hold at least 1024 according to [implimits]. | ||||||||
1695 | /// However as this limit is somewhat easy to hit with template | ||||||||
1696 | /// metaprogramming we'd prefer to keep it as large as possible. | ||||||||
1697 | /// At the moment it has been left as a non-bitfield since this type | ||||||||
1698 | /// safely fits in 64 bits as an unsigned, so there is no reason to | ||||||||
1699 | /// introduce the performance impact of a bitfield. | ||||||||
1700 | unsigned NumArgs; | ||||||||
1701 | }; | ||||||||
1702 | |||||||||
1703 | class TemplateSpecializationTypeBitfields { | ||||||||
1704 | friend class TemplateSpecializationType; | ||||||||
1705 | |||||||||
1706 | unsigned : NumTypeBits; | ||||||||
1707 | |||||||||
1708 | /// Whether this template specialization type is a substituted type alias. | ||||||||
1709 | unsigned TypeAlias : 1; | ||||||||
1710 | |||||||||
1711 | /// The number of template arguments named in this class template | ||||||||
1712 | /// specialization, which is expected to be able to hold at least 1024 | ||||||||
1713 | /// according to [implimits]. However, as this limit is somewhat easy to | ||||||||
1714 | /// hit with template metaprogramming we'd prefer to keep it as large | ||||||||
1715 | /// as possible. At the moment it has been left as a non-bitfield since | ||||||||
1716 | /// this type safely fits in 64 bits as an unsigned, so there is no reason | ||||||||
1717 | /// to introduce the performance impact of a bitfield. | ||||||||
1718 | unsigned NumArgs; | ||||||||
1719 | }; | ||||||||
1720 | |||||||||
1721 | class DependentTemplateSpecializationTypeBitfields { | ||||||||
1722 | friend class DependentTemplateSpecializationType; | ||||||||
1723 | |||||||||
1724 | unsigned : NumTypeBits; | ||||||||
1725 | unsigned : NumTypeWithKeywordBits; | ||||||||
1726 | |||||||||
1727 | /// The number of template arguments named in this class template | ||||||||
1728 | /// specialization, which is expected to be able to hold at least 1024 | ||||||||
1729 | /// according to [implimits]. However, as this limit is somewhat easy to | ||||||||
1730 | /// hit with template metaprogramming we'd prefer to keep it as large | ||||||||
1731 | /// as possible. At the moment it has been left as a non-bitfield since | ||||||||
1732 | /// this type safely fits in 64 bits as an unsigned, so there is no reason | ||||||||
1733 | /// to introduce the performance impact of a bitfield. | ||||||||
1734 | unsigned NumArgs; | ||||||||
1735 | }; | ||||||||
1736 | |||||||||
1737 | class PackExpansionTypeBitfields { | ||||||||
1738 | friend class PackExpansionType; | ||||||||
1739 | |||||||||
1740 | unsigned : NumTypeBits; | ||||||||
1741 | |||||||||
1742 | /// The number of expansions that this pack expansion will | ||||||||
1743 | /// generate when substituted (+1), which is expected to be able to | ||||||||
1744 | /// hold at least 1024 according to [implimits]. However, as this limit | ||||||||
1745 | /// is somewhat easy to hit with template metaprogramming we'd prefer to | ||||||||
1746 | /// keep it as large as possible. At the moment it has been left as a | ||||||||
1747 | /// non-bitfield since this type safely fits in 64 bits as an unsigned, so | ||||||||
1748 | /// there is no reason to introduce the performance impact of a bitfield. | ||||||||
1749 | /// | ||||||||
1750 | /// This field will only have a non-zero value when some of the parameter | ||||||||
1751 | /// packs that occur within the pattern have been substituted but others | ||||||||
1752 | /// have not. | ||||||||
1753 | unsigned NumExpansions; | ||||||||
1754 | }; | ||||||||
1755 | |||||||||
1756 | union { | ||||||||
1757 | TypeBitfields TypeBits; | ||||||||
1758 | ArrayTypeBitfields ArrayTypeBits; | ||||||||
1759 | ConstantArrayTypeBitfields ConstantArrayTypeBits; | ||||||||
1760 | AttributedTypeBitfields AttributedTypeBits; | ||||||||
1761 | AutoTypeBitfields AutoTypeBits; | ||||||||
1762 | BuiltinTypeBitfields BuiltinTypeBits; | ||||||||
1763 | FunctionTypeBitfields FunctionTypeBits; | ||||||||
1764 | ObjCObjectTypeBitfields ObjCObjectTypeBits; | ||||||||
1765 | ReferenceTypeBitfields ReferenceTypeBits; | ||||||||
1766 | TypeWithKeywordBitfields TypeWithKeywordBits; | ||||||||
1767 | ElaboratedTypeBitfields ElaboratedTypeBits; | ||||||||
1768 | VectorTypeBitfields VectorTypeBits; | ||||||||
1769 | SubstTemplateTypeParmPackTypeBitfields SubstTemplateTypeParmPackTypeBits; | ||||||||
1770 | TemplateSpecializationTypeBitfields TemplateSpecializationTypeBits; | ||||||||
1771 | DependentTemplateSpecializationTypeBitfields | ||||||||
1772 | DependentTemplateSpecializationTypeBits; | ||||||||
1773 | PackExpansionTypeBitfields PackExpansionTypeBits; | ||||||||
1774 | |||||||||
1775 | static_assert(sizeof(TypeBitfields) <= 8, | ||||||||
1776 | "TypeBitfields is larger than 8 bytes!"); | ||||||||
1777 | static_assert(sizeof(ArrayTypeBitfields) <= 8, | ||||||||
1778 | "ArrayTypeBitfields is larger than 8 bytes!"); | ||||||||
1779 | static_assert(sizeof(AttributedTypeBitfields) <= 8, | ||||||||
1780 | "AttributedTypeBitfields is larger than 8 bytes!"); | ||||||||
1781 | static_assert(sizeof(AutoTypeBitfields) <= 8, | ||||||||
1782 | "AutoTypeBitfields is larger than 8 bytes!"); | ||||||||
1783 | static_assert(sizeof(BuiltinTypeBitfields) <= 8, | ||||||||
1784 | "BuiltinTypeBitfields is larger than 8 bytes!"); | ||||||||
1785 | static_assert(sizeof(FunctionTypeBitfields) <= 8, | ||||||||
1786 | "FunctionTypeBitfields is larger than 8 bytes!"); | ||||||||
1787 | static_assert(sizeof(ObjCObjectTypeBitfields) <= 8, | ||||||||
1788 | "ObjCObjectTypeBitfields is larger than 8 bytes!"); | ||||||||
1789 | static_assert(sizeof(ReferenceTypeBitfields) <= 8, | ||||||||
1790 | "ReferenceTypeBitfields is larger than 8 bytes!"); | ||||||||
1791 | static_assert(sizeof(TypeWithKeywordBitfields) <= 8, | ||||||||
1792 | "TypeWithKeywordBitfields is larger than 8 bytes!"); | ||||||||
1793 | static_assert(sizeof(ElaboratedTypeBitfields) <= 8, | ||||||||
1794 | "ElaboratedTypeBitfields is larger than 8 bytes!"); | ||||||||
1795 | static_assert(sizeof(VectorTypeBitfields) <= 8, | ||||||||
1796 | "VectorTypeBitfields is larger than 8 bytes!"); | ||||||||
1797 | static_assert(sizeof(SubstTemplateTypeParmPackTypeBitfields) <= 8, | ||||||||
1798 | "SubstTemplateTypeParmPackTypeBitfields is larger" | ||||||||
1799 | " than 8 bytes!"); | ||||||||
1800 | static_assert(sizeof(TemplateSpecializationTypeBitfields) <= 8, | ||||||||
1801 | "TemplateSpecializationTypeBitfields is larger" | ||||||||
1802 | " than 8 bytes!"); | ||||||||
1803 | static_assert(sizeof(DependentTemplateSpecializationTypeBitfields) <= 8, | ||||||||
1804 | "DependentTemplateSpecializationTypeBitfields is larger" | ||||||||
1805 | " than 8 bytes!"); | ||||||||
1806 | static_assert(sizeof(PackExpansionTypeBitfields) <= 8, | ||||||||
1807 | "PackExpansionTypeBitfields is larger than 8 bytes"); | ||||||||
1808 | }; | ||||||||
1809 | |||||||||
1810 | private: | ||||||||
1811 | template <class T> friend class TypePropertyCache; | ||||||||
1812 | |||||||||
1813 | /// Set whether this type comes from an AST file. | ||||||||
1814 | void setFromAST(bool V = true) const { | ||||||||
1815 | TypeBits.FromAST = V; | ||||||||
1816 | } | ||||||||
1817 | |||||||||
1818 | protected: | ||||||||
1819 | friend class ASTContext; | ||||||||
1820 | |||||||||
1821 | Type(TypeClass tc, QualType canon, bool Dependent, | ||||||||
1822 | bool InstantiationDependent, bool VariablyModified, | ||||||||
1823 | bool ContainsUnexpandedParameterPack) | ||||||||
1824 | : ExtQualsTypeCommonBase(this, | ||||||||
1825 | canon.isNull() ? QualType(this_(), 0) : canon) { | ||||||||
1826 | auto Deps = TypeDependence::None; | ||||||||
1827 | if (Dependent) | ||||||||
1828 | Deps |= TypeDependence::Dependent | TypeDependence::Instantiation; | ||||||||
1829 | if (InstantiationDependent) | ||||||||
1830 | Deps |= TypeDependence::Instantiation; | ||||||||
1831 | if (ContainsUnexpandedParameterPack) | ||||||||
1832 | Deps |= TypeDependence::UnexpandedPack; | ||||||||
1833 | if (VariablyModified) | ||||||||
1834 | Deps |= TypeDependence::VariablyModified; | ||||||||
1835 | |||||||||
1836 | TypeBits.TC = tc; | ||||||||
1837 | TypeBits.Dependence = static_cast<unsigned>(Deps); | ||||||||
1838 | TypeBits.CacheValid = false; | ||||||||
1839 | TypeBits.CachedLocalOrUnnamed = false; | ||||||||
1840 | TypeBits.CachedLinkage = NoLinkage; | ||||||||
1841 | TypeBits.FromAST = false; | ||||||||
1842 | } | ||||||||
1843 | |||||||||
1844 | // silence VC++ warning C4355: 'this' : used in base member initializer list | ||||||||
1845 | Type *this_() { return this; } | ||||||||
1846 | |||||||||
1847 | void setDependent(bool D = true) { | ||||||||
1848 | if (!D) { | ||||||||
1849 | TypeBits.Dependence &= ~static_cast<unsigned>(TypeDependence::Dependent); | ||||||||
1850 | return; | ||||||||
1851 | } | ||||||||
1852 | TypeBits.Dependence |= static_cast<unsigned>(TypeDependence::Dependent | | ||||||||
1853 | TypeDependence::Instantiation); | ||||||||
1854 | } | ||||||||
1855 | |||||||||
1856 | void setInstantiationDependent(bool D = true) { | ||||||||
1857 | if (D) | ||||||||
1858 | TypeBits.Dependence |= | ||||||||
1859 | static_cast<unsigned>(TypeDependence::Instantiation); | ||||||||
1860 | else | ||||||||
1861 | TypeBits.Dependence &= | ||||||||
1862 | ~static_cast<unsigned>(TypeDependence::Instantiation); | ||||||||
1863 | } | ||||||||
1864 | |||||||||
1865 | void setVariablyModified(bool VM = true) { | ||||||||
1866 | if (VM) | ||||||||
1867 | TypeBits.Dependence |= | ||||||||
1868 | static_cast<unsigned>(TypeDependence::VariablyModified); | ||||||||
1869 | else | ||||||||
1870 | TypeBits.Dependence &= | ||||||||
1871 | ~static_cast<unsigned>(TypeDependence::VariablyModified); | ||||||||
1872 | } | ||||||||
1873 | |||||||||
1874 | void setContainsUnexpandedParameterPack(bool PP = true) { | ||||||||
1875 | if (PP) | ||||||||
1876 | TypeBits.Dependence |= | ||||||||
1877 | static_cast<unsigned>(TypeDependence::UnexpandedPack); | ||||||||
1878 | else | ||||||||
1879 | TypeBits.Dependence &= | ||||||||
1880 | ~static_cast<unsigned>(TypeDependence::UnexpandedPack); | ||||||||
1881 | } | ||||||||
1882 | |||||||||
1883 | public: | ||||||||
1884 | friend class ASTReader; | ||||||||
1885 | friend class ASTWriter; | ||||||||
1886 | template <class T> friend class serialization::AbstractTypeReader; | ||||||||
1887 | template <class T> friend class serialization::AbstractTypeWriter; | ||||||||
1888 | |||||||||
1889 | Type(const Type &) = delete; | ||||||||
1890 | Type(Type &&) = delete; | ||||||||
1891 | Type &operator=(const Type &) = delete; | ||||||||
1892 | Type &operator=(Type &&) = delete; | ||||||||
1893 | |||||||||
1894 | TypeClass getTypeClass() const { return static_cast<TypeClass>(TypeBits.TC); } | ||||||||
1895 | |||||||||
1896 | /// Whether this type comes from an AST file. | ||||||||
1897 | bool isFromAST() const { return TypeBits.FromAST; } | ||||||||
1898 | |||||||||
1899 | /// Whether this type is or contains an unexpanded parameter | ||||||||
1900 | /// pack, used to support C++0x variadic templates. | ||||||||
1901 | /// | ||||||||
1902 | /// A type that contains a parameter pack shall be expanded by the | ||||||||
1903 | /// ellipsis operator at some point. For example, the typedef in the | ||||||||
1904 | /// following example contains an unexpanded parameter pack 'T': | ||||||||
1905 | /// | ||||||||
1906 | /// \code | ||||||||
1907 | /// template<typename ...T> | ||||||||
1908 | /// struct X { | ||||||||
1909 | /// typedef T* pointer_types; // ill-formed; T is a parameter pack. | ||||||||
1910 | /// }; | ||||||||
1911 | /// \endcode | ||||||||
1912 | /// | ||||||||
1913 | /// Note that this routine does not specify which | ||||||||
1914 | bool containsUnexpandedParameterPack() const { | ||||||||
1915 | return getDependence() & TypeDependence::UnexpandedPack; | ||||||||
1916 | } | ||||||||
1917 | |||||||||
1918 | /// Determines if this type would be canonical if it had no further | ||||||||
1919 | /// qualification. | ||||||||
1920 | bool isCanonicalUnqualified() const { | ||||||||
1921 | return CanonicalType == QualType(this, 0); | ||||||||
1922 | } | ||||||||
1923 | |||||||||
1924 | /// Pull a single level of sugar off of this locally-unqualified type. | ||||||||
1925 | /// Users should generally prefer SplitQualType::getSingleStepDesugaredType() | ||||||||
1926 | /// or QualType::getSingleStepDesugaredType(const ASTContext&). | ||||||||
1927 | QualType getLocallyUnqualifiedSingleStepDesugaredType() const; | ||||||||
1928 | |||||||||
1929 | /// Types are partitioned into 3 broad categories (C99 6.2.5p1): | ||||||||
1930 | /// object types, function types, and incomplete types. | ||||||||
1931 | |||||||||
1932 | /// Return true if this is an incomplete type. | ||||||||
1933 | /// A type that can describe objects, but which lacks information needed to | ||||||||
1934 | /// determine its size (e.g. void, or a fwd declared struct). Clients of this | ||||||||
1935 | /// routine will need to determine if the size is actually required. | ||||||||
1936 | /// | ||||||||
1937 | /// Def If non-null, and the type refers to some kind of declaration | ||||||||
1938 | /// that can be completed (such as a C struct, C++ class, or Objective-C | ||||||||
1939 | /// class), will be set to the declaration. | ||||||||
1940 | bool isIncompleteType(NamedDecl **Def = nullptr) const; | ||||||||
1941 | |||||||||
1942 | /// Return true if this is an incomplete or object | ||||||||
1943 | /// type, in other words, not a function type. | ||||||||
1944 | bool isIncompleteOrObjectType() const { | ||||||||
1945 | return !isFunctionType(); | ||||||||
1946 | } | ||||||||
1947 | |||||||||
1948 | /// Determine whether this type is an object type. | ||||||||
1949 | bool isObjectType() const { | ||||||||
1950 | // C++ [basic.types]p8: | ||||||||
1951 | // An object type is a (possibly cv-qualified) type that is not a | ||||||||
1952 | // function type, not a reference type, and not a void type. | ||||||||
1953 | return !isReferenceType() && !isFunctionType() && !isVoidType(); | ||||||||
1954 | } | ||||||||
1955 | |||||||||
1956 | /// Return true if this is a literal type | ||||||||
1957 | /// (C++11 [basic.types]p10) | ||||||||
1958 | bool isLiteralType(const ASTContext &Ctx) const; | ||||||||
1959 | |||||||||
1960 | /// Test if this type is a standard-layout type. | ||||||||
1961 | /// (C++0x [basic.type]p9) | ||||||||
1962 | bool isStandardLayoutType() const; | ||||||||
1963 | |||||||||
1964 | /// Helper methods to distinguish type categories. All type predicates | ||||||||
1965 | /// operate on the canonical type, ignoring typedefs and qualifiers. | ||||||||
1966 | |||||||||
1967 | /// Returns true if the type is a builtin type. | ||||||||
1968 | bool isBuiltinType() const; | ||||||||
1969 | |||||||||
1970 | /// Test for a particular builtin type. | ||||||||
1971 | bool isSpecificBuiltinType(unsigned K) const; | ||||||||
1972 | |||||||||
1973 | /// Test for a type which does not represent an actual type-system type but | ||||||||
1974 | /// is instead used as a placeholder for various convenient purposes within | ||||||||
1975 | /// Clang. All such types are BuiltinTypes. | ||||||||
1976 | bool isPlaceholderType() const; | ||||||||
1977 | const BuiltinType *getAsPlaceholderType() const; | ||||||||
1978 | |||||||||
1979 | /// Test for a specific placeholder type. | ||||||||
1980 | bool isSpecificPlaceholderType(unsigned K) const; | ||||||||
1981 | |||||||||
1982 | /// Test for a placeholder type other than Overload; see | ||||||||
1983 | /// BuiltinType::isNonOverloadPlaceholderType. | ||||||||
1984 | bool isNonOverloadPlaceholderType() const; | ||||||||
1985 | |||||||||
1986 | /// isIntegerType() does *not* include complex integers (a GCC extension). | ||||||||
1987 | /// isComplexIntegerType() can be used to test for complex integers. | ||||||||
1988 | bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) | ||||||||
1989 | bool isEnumeralType() const; | ||||||||
1990 | |||||||||
1991 | /// Determine whether this type is a scoped enumeration type. | ||||||||
1992 | bool isScopedEnumeralType() const; | ||||||||
1993 | bool isBooleanType() const; | ||||||||
1994 | bool isCharType() const; | ||||||||
1995 | bool isWideCharType() const; | ||||||||
1996 | bool isChar8Type() const; | ||||||||
1997 | bool isChar16Type() const; | ||||||||
1998 | bool isChar32Type() const; | ||||||||
1999 | bool isAnyCharacterType() const; | ||||||||
2000 | bool isIntegralType(const ASTContext &Ctx) const; | ||||||||
2001 | |||||||||
2002 | /// Determine whether this type is an integral or enumeration type. | ||||||||
2003 | bool isIntegralOrEnumerationType() const; | ||||||||
2004 | |||||||||
2005 | /// Determine whether this type is an integral or unscoped enumeration type. | ||||||||
2006 | bool isIntegralOrUnscopedEnumerationType() const; | ||||||||
2007 | bool isUnscopedEnumerationType() const; | ||||||||
2008 | |||||||||
2009 | /// Floating point categories. | ||||||||
2010 | bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) | ||||||||
2011 | /// isComplexType() does *not* include complex integers (a GCC extension). | ||||||||
2012 | /// isComplexIntegerType() can be used to test for complex integers. | ||||||||
2013 | bool isComplexType() const; // C99 6.2.5p11 (complex) | ||||||||
2014 | bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. | ||||||||
2015 | bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) | ||||||||
2016 | bool isHalfType() const; // OpenCL 6.1.1.1, NEON (IEEE 754-2008 half) | ||||||||
2017 | bool isFloat16Type() const; // C11 extension ISO/IEC TS 18661 | ||||||||
2018 | bool isFloat128Type() const; | ||||||||
2019 | bool isRealType() const; // C99 6.2.5p17 (real floating + integer) | ||||||||
2020 | bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) | ||||||||
2021 | bool isVoidType() const; // C99 6.2.5p19 | ||||||||
2022 | bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) | ||||||||
2023 | bool isAggregateType() const; | ||||||||
2024 | bool isFundamentalType() const; | ||||||||
2025 | bool isCompoundType() const; | ||||||||
2026 | |||||||||
2027 | // Type Predicates: Check to see if this type is structurally the specified | ||||||||
2028 | // type, ignoring typedefs and qualifiers. | ||||||||
2029 | bool isFunctionType() const; | ||||||||
2030 | bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } | ||||||||
2031 | bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } | ||||||||
2032 | bool isPointerType() const; | ||||||||
2033 | bool isAnyPointerType() const; // Any C pointer or ObjC object pointer | ||||||||
2034 | bool isBlockPointerType() const; | ||||||||
2035 | bool isVoidPointerType() const; | ||||||||
2036 | bool isReferenceType() const; | ||||||||
2037 | bool isLValueReferenceType() const; | ||||||||
2038 | bool isRValueReferenceType() const; | ||||||||
2039 | bool isObjectPointerType() const; | ||||||||
2040 | bool isFunctionPointerType() const; | ||||||||
2041 | bool isFunctionReferenceType() const; | ||||||||
2042 | bool isMemberPointerType() const; | ||||||||
2043 | bool isMemberFunctionPointerType() const; | ||||||||
2044 | bool isMemberDataPointerType() const; | ||||||||
2045 | bool isArrayType() const; | ||||||||
2046 | bool isConstantArrayType() const; | ||||||||
2047 | bool isIncompleteArrayType() const; | ||||||||
2048 | bool isVariableArrayType() const; | ||||||||
2049 | bool isDependentSizedArrayType() const; | ||||||||
2050 | bool isRecordType() const; | ||||||||
2051 | bool isClassType() const; | ||||||||
2052 | bool isStructureType() const; | ||||||||
2053 | bool isObjCBoxableRecordType() const; | ||||||||
2054 | bool isInterfaceType() const; | ||||||||
2055 | bool isStructureOrClassType() const; | ||||||||
2056 | bool isUnionType() const; | ||||||||
2057 | bool isComplexIntegerType() const; // GCC _Complex integer type. | ||||||||
2058 | bool isVectorType() const; // GCC vector type. | ||||||||
2059 | bool isExtVectorType() const; // Extended vector type. | ||||||||
2060 | bool isDependentAddressSpaceType() const; // value-dependent address space qualifier | ||||||||
2061 | bool isObjCObjectPointerType() const; // pointer to ObjC object | ||||||||
2062 | bool isObjCRetainableType() const; // ObjC object or block pointer | ||||||||
2063 | bool isObjCLifetimeType() const; // (array of)* retainable type | ||||||||
2064 | bool isObjCIndirectLifetimeType() const; // (pointer to)* lifetime type | ||||||||
2065 | bool isObjCNSObjectType() const; // __attribute__((NSObject)) | ||||||||
2066 | bool isObjCIndependentClassType() const; // __attribute__((objc_independent_class)) | ||||||||
2067 | // FIXME: change this to 'raw' interface type, so we can used 'interface' type | ||||||||
2068 | // for the common case. | ||||||||
2069 | bool isObjCObjectType() const; // NSString or typeof(*(id)0) | ||||||||
2070 | bool isObjCQualifiedInterfaceType() const; // NSString<foo> | ||||||||
2071 | bool isObjCQualifiedIdType() const; // id<foo> | ||||||||
2072 | bool isObjCQualifiedClassType() const; // Class<foo> | ||||||||
2073 | bool isObjCObjectOrInterfaceType() const; | ||||||||
2074 | bool isObjCIdType() const; // id | ||||||||
2075 | bool isDecltypeType() const; | ||||||||
2076 | /// Was this type written with the special inert-in-ARC __unsafe_unretained | ||||||||
2077 | /// qualifier? | ||||||||
2078 | /// | ||||||||
2079 | /// This approximates the answer to the following question: if this | ||||||||
2080 | /// translation unit were compiled in ARC, would this type be qualified | ||||||||
2081 | /// with __unsafe_unretained? | ||||||||
2082 | bool isObjCInertUnsafeUnretainedType() const { | ||||||||
2083 | return hasAttr(attr::ObjCInertUnsafeUnretained); | ||||||||
2084 | } | ||||||||
2085 | |||||||||
2086 | /// Whether the type is Objective-C 'id' or a __kindof type of an | ||||||||
2087 | /// object type, e.g., __kindof NSView * or __kindof id | ||||||||
2088 | /// <NSCopying>. | ||||||||
2089 | /// | ||||||||
2090 | /// \param bound Will be set to the bound on non-id subtype types, | ||||||||
2091 | /// which will be (possibly specialized) Objective-C class type, or | ||||||||
2092 | /// null for 'id. | ||||||||
2093 | bool isObjCIdOrObjectKindOfType(const ASTContext &ctx, | ||||||||
2094 | const ObjCObjectType *&bound) const; | ||||||||
2095 | |||||||||
2096 | bool isObjCClassType() const; // Class | ||||||||
2097 | |||||||||
2098 | /// Whether the type is Objective-C 'Class' or a __kindof type of an | ||||||||
2099 | /// Class type, e.g., __kindof Class <NSCopying>. | ||||||||
2100 | /// | ||||||||
2101 | /// Unlike \c isObjCIdOrObjectKindOfType, there is no relevant bound | ||||||||
2102 | /// here because Objective-C's type system cannot express "a class | ||||||||
2103 | /// object for a subclass of NSFoo". | ||||||||
2104 | bool isObjCClassOrClassKindOfType() const; | ||||||||
2105 | |||||||||
2106 | bool isBlockCompatibleObjCPointerType(ASTContext &ctx) const; | ||||||||
2107 | bool isObjCSelType() const; // Class | ||||||||
2108 | bool isObjCBuiltinType() const; // 'id' or 'Class' | ||||||||
2109 | bool isObjCARCBridgableType() const; | ||||||||
2110 | bool isCARCBridgableType() const; | ||||||||
2111 | bool isTemplateTypeParmType() const; // C++ template type parameter | ||||||||
2112 | bool isNullPtrType() const; // C++11 std::nullptr_t | ||||||||
2113 | bool isNothrowT() const; // C++ std::nothrow_t | ||||||||
2114 | bool isAlignValT() const; // C++17 std::align_val_t | ||||||||
2115 | bool isStdByteType() const; // C++17 std::byte | ||||||||
2116 | bool isAtomicType() const; // C11 _Atomic() | ||||||||
2117 | bool isUndeducedAutoType() const; // C++11 auto or | ||||||||
2118 | // C++14 decltype(auto) | ||||||||
2119 | |||||||||
2120 | #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \ | ||||||||
2121 | bool is##Id##Type() const; | ||||||||
2122 | #include "clang/Basic/OpenCLImageTypes.def" | ||||||||
2123 | |||||||||
2124 | bool isImageType() const; // Any OpenCL image type | ||||||||
2125 | |||||||||
2126 | bool isSamplerT() const; // OpenCL sampler_t | ||||||||
2127 | bool isEventT() const; // OpenCL event_t | ||||||||
2128 | bool isClkEventT() const; // OpenCL clk_event_t | ||||||||
2129 | bool isQueueT() const; // OpenCL queue_t | ||||||||
2130 | bool isReserveIDT() const; // OpenCL reserve_id_t | ||||||||
2131 | |||||||||
2132 | #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \ | ||||||||
2133 | bool is##Id##Type() const; | ||||||||
2134 | #include "clang/Basic/OpenCLExtensionTypes.def" | ||||||||
2135 | // Type defined in cl_intel_device_side_avc_motion_estimation OpenCL extension | ||||||||
2136 | bool isOCLIntelSubgroupAVCType() const; | ||||||||
2137 | bool isOCLExtOpaqueType() const; // Any OpenCL extension type | ||||||||
2138 | |||||||||
2139 | bool isPipeType() const; // OpenCL pipe type | ||||||||
2140 | bool isOpenCLSpecificType() const; // Any OpenCL specific type | ||||||||
2141 | |||||||||
2142 | /// Determines if this type, which must satisfy | ||||||||
2143 | /// isObjCLifetimeType(), is implicitly __unsafe_unretained rather | ||||||||
2144 | /// than implicitly __strong. | ||||||||
2145 | bool isObjCARCImplicitlyUnretainedType() const; | ||||||||
2146 | |||||||||
2147 | /// Return the implicit lifetime for this type, which must not be dependent. | ||||||||
2148 | Qualifiers::ObjCLifetime getObjCARCImplicitLifetime() const; | ||||||||
2149 | |||||||||
2150 | enum ScalarTypeKind { | ||||||||
2151 | STK_CPointer, | ||||||||
2152 | STK_BlockPointer, | ||||||||
2153 | STK_ObjCObjectPointer, | ||||||||
2154 | STK_MemberPointer, | ||||||||
2155 | STK_Bool, | ||||||||
2156 | STK_Integral, | ||||||||
2157 | STK_Floating, | ||||||||
2158 | STK_IntegralComplex, | ||||||||
2159 | STK_FloatingComplex, | ||||||||
2160 | STK_FixedPoint | ||||||||
2161 | }; | ||||||||
2162 | |||||||||
2163 | /// Given that this is a scalar type, classify it. | ||||||||
2164 | ScalarTypeKind getScalarTypeKind() const; | ||||||||
2165 | |||||||||
2166 | TypeDependence getDependence() const { | ||||||||
2167 | return static_cast<TypeDependence>(TypeBits.Dependence); | ||||||||
2168 | } | ||||||||
2169 | |||||||||
2170 | /// Whether this type is a dependent type, meaning that its definition | ||||||||
2171 | /// somehow depends on a template parameter (C++ [temp.dep.type]). | ||||||||
2172 | bool isDependentType() const { | ||||||||
2173 | return getDependence() & TypeDependence::Dependent; | ||||||||
2174 | } | ||||||||
2175 | |||||||||
2176 | /// Determine whether this type is an instantiation-dependent type, | ||||||||
2177 | /// meaning that the type involves a template parameter (even if the | ||||||||
2178 | /// definition does not actually depend on the type substituted for that | ||||||||
2179 | /// template parameter). | ||||||||
2180 | bool isInstantiationDependentType() const { | ||||||||
2181 | return getDependence() & TypeDependence::Instantiation; | ||||||||
2182 | } | ||||||||
2183 | |||||||||
2184 | /// Determine whether this type is an undeduced type, meaning that | ||||||||
2185 | /// it somehow involves a C++11 'auto' type or similar which has not yet been | ||||||||
2186 | /// deduced. | ||||||||
2187 | bool isUndeducedType() const; | ||||||||
2188 | |||||||||
2189 | /// Whether this type is a variably-modified type (C99 6.7.5). | ||||||||
2190 | bool isVariablyModifiedType() const { | ||||||||
2191 | return getDependence() & TypeDependence::VariablyModified; | ||||||||
2192 | } | ||||||||
2193 | |||||||||
2194 | /// Whether this type involves a variable-length array type | ||||||||
2195 | /// with a definite size. | ||||||||
2196 | bool hasSizedVLAType() const; | ||||||||
2197 | |||||||||
2198 | /// Whether this type is or contains a local or unnamed type. | ||||||||
2199 | bool hasUnnamedOrLocalType() const; | ||||||||
2200 | |||||||||
2201 | bool isOverloadableType() const; | ||||||||
2202 | |||||||||
2203 | /// Determine wither this type is a C++ elaborated-type-specifier. | ||||||||
2204 | bool isElaboratedTypeSpecifier() const; | ||||||||
2205 | |||||||||
2206 | bool canDecayToPointerType() const; | ||||||||
2207 | |||||||||
2208 | /// Whether this type is represented natively as a pointer. This includes | ||||||||
2209 | /// pointers, references, block pointers, and Objective-C interface, | ||||||||
2210 | /// qualified id, and qualified interface types, as well as nullptr_t. | ||||||||
2211 | bool hasPointerRepresentation() const; | ||||||||
2212 | |||||||||
2213 | /// Whether this type can represent an objective pointer type for the | ||||||||
2214 | /// purpose of GC'ability | ||||||||
2215 | bool hasObjCPointerRepresentation() const; | ||||||||
2216 | |||||||||
2217 | /// Determine whether this type has an integer representation | ||||||||
2218 | /// of some sort, e.g., it is an integer type or a vector. | ||||||||
2219 | bool hasIntegerRepresentation() const; | ||||||||
2220 | |||||||||
2221 | /// Determine whether this type has an signed integer representation | ||||||||
2222 | /// of some sort, e.g., it is an signed integer type or a vector. | ||||||||
2223 | bool hasSignedIntegerRepresentation() const; | ||||||||
2224 | |||||||||
2225 | /// Determine whether this type has an unsigned integer representation | ||||||||
2226 | /// of some sort, e.g., it is an unsigned integer type or a vector. | ||||||||
2227 | bool hasUnsignedIntegerRepresentation() const; | ||||||||
2228 | |||||||||
2229 | /// Determine whether this type has a floating-point representation | ||||||||
2230 | /// of some sort, e.g., it is a floating-point type or a vector thereof. | ||||||||
2231 | bool hasFloatingRepresentation() const; | ||||||||
2232 | |||||||||
2233 | // Type Checking Functions: Check to see if this type is structurally the | ||||||||
2234 | // specified type, ignoring typedefs and qualifiers, and return a pointer to | ||||||||
2235 | // the best type we can. | ||||||||
2236 | const RecordType *getAsStructureType() const; | ||||||||
2237 | /// NOTE: getAs*ArrayType are methods on ASTContext. | ||||||||
2238 | const RecordType *getAsUnionType() const; | ||||||||
2239 | const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. | ||||||||
2240 | const ObjCObjectType *getAsObjCInterfaceType() const; | ||||||||
2241 | |||||||||
2242 | // The following is a convenience method that returns an ObjCObjectPointerType | ||||||||
2243 | // for object declared using an interface. | ||||||||
2244 | const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; | ||||||||
2245 | const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; | ||||||||
2246 | const ObjCObjectPointerType *getAsObjCQualifiedClassType() const; | ||||||||
2247 | const ObjCObjectType *getAsObjCQualifiedInterfaceType() const; | ||||||||
2248 | |||||||||
2249 | /// Retrieves the CXXRecordDecl that this type refers to, either | ||||||||
2250 | /// because the type is a RecordType or because it is the injected-class-name | ||||||||
2251 | /// type of a class template or class template partial specialization. | ||||||||
2252 | CXXRecordDecl *getAsCXXRecordDecl() const; | ||||||||
2253 | |||||||||
2254 | /// Retrieves the RecordDecl this type refers to. | ||||||||
2255 | RecordDecl *getAsRecordDecl() const; | ||||||||
2256 | |||||||||
2257 | /// Retrieves the TagDecl that this type refers to, either | ||||||||
2258 | /// because the type is a TagType or because it is the injected-class-name | ||||||||
2259 | /// type of a class template or class template partial specialization. | ||||||||
2260 | TagDecl *getAsTagDecl() const; | ||||||||
2261 | |||||||||
2262 | /// If this is a pointer or reference to a RecordType, return the | ||||||||
2263 | /// CXXRecordDecl that the type refers to. | ||||||||
2264 | /// | ||||||||
2265 | /// If this is not a pointer or reference, or the type being pointed to does | ||||||||
2266 | /// not refer to a CXXRecordDecl, returns NULL. | ||||||||
2267 | const CXXRecordDecl *getPointeeCXXRecordDecl() const; | ||||||||
2268 | |||||||||
2269 | /// Get the DeducedType whose type will be deduced for a variable with | ||||||||
2270 | /// an initializer of this type. This looks through declarators like pointer | ||||||||
2271 | /// types, but not through decltype or typedefs. | ||||||||
2272 | DeducedType *getContainedDeducedType() const; | ||||||||
2273 | |||||||||
2274 | /// Get the AutoType whose type will be deduced for a variable with | ||||||||
2275 | /// an initializer of this type. This looks through declarators like pointer | ||||||||
2276 | /// types, but not through decltype or typedefs. | ||||||||
2277 | AutoType *getContainedAutoType() const { | ||||||||
2278 | return dyn_cast_or_null<AutoType>(getContainedDeducedType()); | ||||||||
2279 | } | ||||||||
2280 | |||||||||
2281 | /// Determine whether this type was written with a leading 'auto' | ||||||||
2282 | /// corresponding to a trailing return type (possibly for a nested | ||||||||
2283 | /// function type within a pointer to function type or similar). | ||||||||
2284 | bool hasAutoForTrailingReturnType() const; | ||||||||
2285 | |||||||||
2286 | /// Member-template getAs<specific type>'. Look through sugar for | ||||||||
2287 | /// an instance of \<specific type>. This scheme will eventually | ||||||||
2288 | /// replace the specific getAsXXXX methods above. | ||||||||
2289 | /// | ||||||||
2290 | /// There are some specializations of this member template listed | ||||||||
2291 | /// immediately following this class. | ||||||||
2292 | template <typename T> const T *getAs() const; | ||||||||
2293 | |||||||||
2294 | /// Member-template getAsAdjusted<specific type>. Look through specific kinds | ||||||||
2295 | /// of sugar (parens, attributes, etc) for an instance of \<specific type>. | ||||||||
2296 | /// This is used when you need to walk over sugar nodes that represent some | ||||||||
2297 | /// kind of type adjustment from a type that was written as a \<specific type> | ||||||||
2298 | /// to another type that is still canonically a \<specific type>. | ||||||||
2299 | template <typename T> const T *getAsAdjusted() const; | ||||||||
2300 | |||||||||
2301 | /// A variant of getAs<> for array types which silently discards | ||||||||
2302 | /// qualifiers from the outermost type. | ||||||||
2303 | const ArrayType *getAsArrayTypeUnsafe() const; | ||||||||
2304 | |||||||||
2305 | /// Member-template castAs<specific type>. Look through sugar for | ||||||||
2306 | /// the underlying instance of \<specific type>. | ||||||||
2307 | /// | ||||||||
2308 | /// This method has the same relationship to getAs<T> as cast<T> has | ||||||||
2309 | /// to dyn_cast<T>; which is to say, the underlying type *must* | ||||||||
2310 | /// have the intended type, and this method will never return null. | ||||||||
2311 | template <typename T> const T *castAs() const; | ||||||||
2312 | |||||||||
2313 | /// A variant of castAs<> for array type which silently discards | ||||||||
2314 | /// qualifiers from the outermost type. | ||||||||
2315 | const ArrayType *castAsArrayTypeUnsafe() const; | ||||||||
2316 | |||||||||
2317 | /// Determine whether this type had the specified attribute applied to it | ||||||||
2318 | /// (looking through top-level type sugar). | ||||||||
2319 | bool hasAttr(attr::Kind AK) const; | ||||||||
2320 | |||||||||
2321 | /// Get the base element type of this type, potentially discarding type | ||||||||
2322 | /// qualifiers. This should never be used when type qualifiers | ||||||||
2323 | /// are meaningful. | ||||||||
2324 | const Type *getBaseElementTypeUnsafe() const; | ||||||||
2325 | |||||||||
2326 | /// If this is an array type, return the element type of the array, | ||||||||
2327 | /// potentially with type qualifiers missing. | ||||||||
2328 | /// This should never be used when type qualifiers are meaningful. | ||||||||
2329 | const Type *getArrayElementTypeNoTypeQual() const; | ||||||||
2330 | |||||||||
2331 | /// If this is a pointer type, return the pointee type. | ||||||||
2332 | /// If this is an array type, return the array element type. | ||||||||
2333 | /// This should never be used when type qualifiers are meaningful. | ||||||||
2334 | const Type *getPointeeOrArrayElementType() const; | ||||||||
2335 | |||||||||
2336 | /// If this is a pointer, ObjC object pointer, or block | ||||||||
2337 | /// pointer, this returns the respective pointee. | ||||||||
2338 | QualType getPointeeType() const; | ||||||||
2339 | |||||||||
2340 | /// Return the specified type with any "sugar" removed from the type, | ||||||||
2341 | /// removing any typedefs, typeofs, etc., as well as any qualifiers. | ||||||||
2342 | const Type *getUnqualifiedDesugaredType() const; | ||||||||
2343 | |||||||||
2344 | /// More type predicates useful for type checking/promotion | ||||||||
2345 | bool isPromotableIntegerType() const; // C99 6.3.1.1p2 | ||||||||
2346 | |||||||||
2347 | /// Return true if this is an integer type that is | ||||||||
2348 | /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], | ||||||||
2349 | /// or an enum decl which has a signed representation. | ||||||||
2350 | bool isSignedIntegerType() const; | ||||||||
2351 | |||||||||
2352 | /// Return true if this is an integer type that is | ||||||||
2353 | /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], | ||||||||
2354 | /// or an enum decl which has an unsigned representation. | ||||||||
2355 | bool isUnsignedIntegerType() const; | ||||||||
2356 | |||||||||
2357 | /// Determines whether this is an integer type that is signed or an | ||||||||
2358 | /// enumeration types whose underlying type is a signed integer type. | ||||||||
2359 | bool isSignedIntegerOrEnumerationType() const; | ||||||||
2360 | |||||||||
2361 | /// Determines whether this is an integer type that is unsigned or an | ||||||||
2362 | /// enumeration types whose underlying type is a unsigned integer type. | ||||||||
2363 | bool isUnsignedIntegerOrEnumerationType() const; | ||||||||
2364 | |||||||||
2365 | /// Return true if this is a fixed point type according to | ||||||||
2366 | /// ISO/IEC JTC1 SC22 WG14 N1169. | ||||||||
2367 | bool isFixedPointType() const; | ||||||||
2368 | |||||||||
2369 | /// Return true if this is a fixed point or integer type. | ||||||||
2370 | bool isFixedPointOrIntegerType() const; | ||||||||
2371 | |||||||||
2372 | /// Return true if this is a saturated fixed point type according to | ||||||||
2373 | /// ISO/IEC JTC1 SC22 WG14 N1169. This type can be signed or unsigned. | ||||||||
2374 | bool isSaturatedFixedPointType() const; | ||||||||
2375 | |||||||||
2376 | /// Return true if this is a saturated fixed point type according to | ||||||||
2377 | /// ISO/IEC JTC1 SC22 WG14 N1169. This type can be signed or unsigned. | ||||||||
2378 | bool isUnsaturatedFixedPointType() const; | ||||||||
2379 | |||||||||
2380 | /// Return true if this is a fixed point type that is signed according | ||||||||
2381 | /// to ISO/IEC JTC1 SC22 WG14 N1169. This type can also be saturated. | ||||||||
2382 | bool isSignedFixedPointType() const; | ||||||||
2383 | |||||||||
2384 | /// Return true if this is a fixed point type that is unsigned according | ||||||||
2385 | /// to ISO/IEC JTC1 SC22 WG14 N1169. This type can also be saturated. | ||||||||
2386 | bool isUnsignedFixedPointType() const; | ||||||||
2387 | |||||||||
2388 | /// Return true if this is not a variable sized type, | ||||||||
2389 | /// according to the rules of C99 6.7.5p3. It is not legal to call this on | ||||||||
2390 | /// incomplete types. | ||||||||
2391 | bool isConstantSizeType() const; | ||||||||
2392 | |||||||||
2393 | /// Returns true if this type can be represented by some | ||||||||
2394 | /// set of type specifiers. | ||||||||
2395 | bool isSpecifierType() const; | ||||||||
2396 | |||||||||
2397 | /// Determine the linkage of this type. | ||||||||
2398 | Linkage getLinkage() const; | ||||||||
2399 | |||||||||
2400 | /// Determine the visibility of this type. | ||||||||
2401 | Visibility getVisibility() const { | ||||||||
2402 | return getLinkageAndVisibility().getVisibility(); | ||||||||
2403 | } | ||||||||
2404 | |||||||||
2405 | /// Return true if the visibility was explicitly set is the code. | ||||||||
2406 | bool isVisibilityExplicit() const { | ||||||||
2407 | return getLinkageAndVisibility().isVisibilityExplicit(); | ||||||||
2408 | } | ||||||||
2409 | |||||||||
2410 | /// Determine the linkage and visibility of this type. | ||||||||
2411 | LinkageInfo getLinkageAndVisibility() const; | ||||||||
2412 | |||||||||
2413 | /// True if the computed linkage is valid. Used for consistency | ||||||||
2414 | /// checking. Should always return true. | ||||||||
2415 | bool isLinkageValid() const; | ||||||||
2416 | |||||||||
2417 | /// Determine the nullability of the given type. | ||||||||
2418 | /// | ||||||||
2419 | /// Note that nullability is only captured as sugar within the type | ||||||||
2420 | /// system, not as part of the canonical type, so nullability will | ||||||||
2421 | /// be lost by canonicalization and desugaring. | ||||||||
2422 | Optional<NullabilityKind> getNullability(const ASTContext &context) const; | ||||||||
2423 | |||||||||
2424 | /// Determine whether the given type can have a nullability | ||||||||
2425 | /// specifier applied to it, i.e., if it is any kind of pointer type. | ||||||||
2426 | /// | ||||||||
2427 | /// \param ResultIfUnknown The value to return if we don't yet know whether | ||||||||
2428 | /// this type can have nullability because it is dependent. | ||||||||
2429 | bool canHaveNullability(bool ResultIfUnknown = true) const; | ||||||||
2430 | |||||||||
2431 | /// Retrieve the set of substitutions required when accessing a member | ||||||||
2432 | /// of the Objective-C receiver type that is declared in the given context. | ||||||||
2433 | /// | ||||||||
2434 | /// \c *this is the type of the object we're operating on, e.g., the | ||||||||
2435 | /// receiver for a message send or the base of a property access, and is | ||||||||
2436 | /// expected to be of some object or object pointer type. | ||||||||
2437 | /// | ||||||||
2438 | /// \param dc The declaration context for which we are building up a | ||||||||
2439 | /// substitution mapping, which should be an Objective-C class, extension, | ||||||||
2440 | /// category, or method within. | ||||||||
2441 | /// | ||||||||
2442 | /// \returns an array of type arguments that can be substituted for | ||||||||
2443 | /// the type parameters of the given declaration context in any type described | ||||||||
2444 | /// within that context, or an empty optional to indicate that no | ||||||||
2445 | /// substitution is required. | ||||||||
2446 | Optional<ArrayRef<QualType>> | ||||||||
2447 | getObjCSubstitutions(const DeclContext *dc) const; | ||||||||
2448 | |||||||||
2449 | /// Determines if this is an ObjC interface type that may accept type | ||||||||
2450 | /// parameters. | ||||||||
2451 | bool acceptsObjCTypeParams() const; | ||||||||
2452 | |||||||||
2453 | const char *getTypeClassName() const; | ||||||||
2454 | |||||||||
2455 | QualType getCanonicalTypeInternal() const { | ||||||||
2456 | return CanonicalType; | ||||||||
2457 | } | ||||||||
2458 | |||||||||
2459 | CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h | ||||||||
2460 | void dump() const; | ||||||||
2461 | void dump(llvm::raw_ostream &OS) const; | ||||||||
2462 | }; | ||||||||
2463 | |||||||||
2464 | /// This will check for a TypedefType by removing any existing sugar | ||||||||
2465 | /// until it reaches a TypedefType or a non-sugared type. | ||||||||
2466 | template <> const TypedefType *Type::getAs() const; | ||||||||
2467 | |||||||||
2468 | /// This will check for a TemplateSpecializationType by removing any | ||||||||
2469 | /// existing sugar until it reaches a TemplateSpecializationType or a | ||||||||
2470 | /// non-sugared type. | ||||||||
2471 | template <> const TemplateSpecializationType *Type::getAs() const; | ||||||||
2472 | |||||||||
2473 | /// This will check for an AttributedType by removing any existing sugar | ||||||||
2474 | /// until it reaches an AttributedType or a non-sugared type. | ||||||||
2475 | template <> const AttributedType *Type::getAs() const; | ||||||||
2476 | |||||||||
2477 | // We can do canonical leaf types faster, because we don't have to | ||||||||
2478 | // worry about preserving child type decoration. | ||||||||
2479 | #define TYPE(Class, Base) | ||||||||
2480 | #define LEAF_TYPE(Class) \ | ||||||||
2481 | template <> inline const Class##Type *Type::getAs() const { \ | ||||||||
2482 | return dyn_cast<Class##Type>(CanonicalType); \ | ||||||||
2483 | } \ | ||||||||
2484 | template <> inline const Class##Type *Type::castAs() const { \ | ||||||||
2485 | return cast<Class##Type>(CanonicalType); \ | ||||||||
2486 | } | ||||||||
2487 | #include "clang/AST/TypeNodes.inc" | ||||||||
2488 | |||||||||
2489 | /// This class is used for builtin types like 'int'. Builtin | ||||||||
2490 | /// types are always canonical and have a literal name field. | ||||||||
2491 | class BuiltinType : public Type { | ||||||||
2492 | public: | ||||||||
2493 | enum Kind { | ||||||||
2494 | // OpenCL image types | ||||||||
2495 | #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) Id, | ||||||||
2496 | #include "clang/Basic/OpenCLImageTypes.def" | ||||||||
2497 | // OpenCL extension types | ||||||||
2498 | #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) Id, | ||||||||
2499 | #include "clang/Basic/OpenCLExtensionTypes.def" | ||||||||
2500 | // SVE Types | ||||||||
2501 | #define SVE_TYPE(Name, Id, SingletonId) Id, | ||||||||
2502 | #include "clang/Basic/AArch64SVEACLETypes.def" | ||||||||
2503 | // All other builtin types | ||||||||
2504 | #define BUILTIN_TYPE(Id, SingletonId) Id, | ||||||||
2505 | #define LAST_BUILTIN_TYPE(Id) LastKind = Id | ||||||||
2506 | #include "clang/AST/BuiltinTypes.def" | ||||||||
2507 | }; | ||||||||
2508 | |||||||||
2509 | private: | ||||||||
2510 | friend class ASTContext; // ASTContext creates these. | ||||||||
2511 | |||||||||
2512 | BuiltinType(Kind K) | ||||||||
2513 | : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent), | ||||||||
2514 | /*InstantiationDependent=*/(K == Dependent), | ||||||||
2515 | /*VariablyModified=*/false, | ||||||||
2516 | /*Unexpanded parameter pack=*/false) { | ||||||||
2517 | BuiltinTypeBits.Kind = K; | ||||||||
2518 | } | ||||||||
2519 | |||||||||
2520 | public: | ||||||||
2521 | Kind getKind() const { return static_cast<Kind>(BuiltinTypeBits.Kind); } | ||||||||
2522 | StringRef getName(const PrintingPolicy &Policy) const; | ||||||||
2523 | |||||||||
2524 | const char *getNameAsCString(const PrintingPolicy &Policy) const { | ||||||||
2525 | // The StringRef is null-terminated. | ||||||||
2526 | StringRef str = getName(Policy); | ||||||||
2527 | assert(!str.empty() && str.data()[str.size()] == '\0')((!str.empty() && str.data()[str.size()] == '\0') ? static_cast <void> (0) : __assert_fail ("!str.empty() && str.data()[str.size()] == '\\0'" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 2527, __PRETTY_FUNCTION__)); | ||||||||
2528 | return str.data(); | ||||||||
2529 | } | ||||||||
2530 | |||||||||
2531 | bool isSugared() const { return false; } | ||||||||
2532 | QualType desugar() const { return QualType(this, 0); } | ||||||||
2533 | |||||||||
2534 | bool isInteger() const { | ||||||||
2535 | return getKind() >= Bool && getKind() <= Int128; | ||||||||
2536 | } | ||||||||
2537 | |||||||||
2538 | bool isSignedInteger() const { | ||||||||
2539 | return getKind() >= Char_S && getKind() <= Int128; | ||||||||
2540 | } | ||||||||
2541 | |||||||||
2542 | bool isUnsignedInteger() const { | ||||||||
2543 | return getKind() >= Bool && getKind() <= UInt128; | ||||||||
2544 | } | ||||||||
2545 | |||||||||
2546 | bool isFloatingPoint() const { | ||||||||
2547 | return getKind() >= Half && getKind() <= Float128; | ||||||||
2548 | } | ||||||||
2549 | |||||||||
2550 | /// Determines whether the given kind corresponds to a placeholder type. | ||||||||
2551 | static bool isPlaceholderTypeKind(Kind K) { | ||||||||
2552 | return K >= Overload; | ||||||||
2553 | } | ||||||||
2554 | |||||||||
2555 | /// Determines whether this type is a placeholder type, i.e. a type | ||||||||
2556 | /// which cannot appear in arbitrary positions in a fully-formed | ||||||||
2557 | /// expression. | ||||||||
2558 | bool isPlaceholderType() const { | ||||||||
2559 | return isPlaceholderTypeKind(getKind()); | ||||||||
2560 | } | ||||||||
2561 | |||||||||
2562 | /// Determines whether this type is a placeholder type other than | ||||||||
2563 | /// Overload. Most placeholder types require only syntactic | ||||||||
2564 | /// information about their context in order to be resolved (e.g. | ||||||||
2565 | /// whether it is a call expression), which means they can (and | ||||||||
2566 | /// should) be resolved in an earlier "phase" of analysis. | ||||||||
2567 | /// Overload expressions sometimes pick up further information | ||||||||
2568 | /// from their context, like whether the context expects a | ||||||||
2569 | /// specific function-pointer type, and so frequently need | ||||||||
2570 | /// special treatment. | ||||||||
2571 | bool isNonOverloadPlaceholderType() const { | ||||||||
2572 | return getKind() > Overload; | ||||||||
2573 | } | ||||||||
2574 | |||||||||
2575 | static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } | ||||||||
2576 | }; | ||||||||
2577 | |||||||||
2578 | /// Complex values, per C99 6.2.5p11. This supports the C99 complex | ||||||||
2579 | /// types (_Complex float etc) as well as the GCC integer complex extensions. | ||||||||
2580 | class ComplexType : public Type, public llvm::FoldingSetNode { | ||||||||
2581 | friend class ASTContext; // ASTContext creates these. | ||||||||
2582 | |||||||||
2583 | QualType ElementType; | ||||||||
2584 | |||||||||
2585 | ComplexType(QualType Element, QualType CanonicalPtr) | ||||||||
2586 | : Type(Complex, CanonicalPtr, Element->isDependentType(), | ||||||||
2587 | Element->isInstantiationDependentType(), | ||||||||
2588 | Element->isVariablyModifiedType(), | ||||||||
2589 | Element->containsUnexpandedParameterPack()), | ||||||||
2590 | ElementType(Element) {} | ||||||||
2591 | |||||||||
2592 | public: | ||||||||
2593 | QualType getElementType() const { return ElementType; } | ||||||||
2594 | |||||||||
2595 | bool isSugared() const { return false; } | ||||||||
2596 | QualType desugar() const { return QualType(this, 0); } | ||||||||
2597 | |||||||||
2598 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||||
2599 | Profile(ID, getElementType()); | ||||||||
2600 | } | ||||||||
2601 | |||||||||
2602 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { | ||||||||
2603 | ID.AddPointer(Element.getAsOpaquePtr()); | ||||||||
2604 | } | ||||||||
2605 | |||||||||
2606 | static bool classof(const Type *T) { return T->getTypeClass() == Complex; } | ||||||||
2607 | }; | ||||||||
2608 | |||||||||
2609 | /// Sugar for parentheses used when specifying types. | ||||||||
2610 | class ParenType : public Type, public llvm::FoldingSetNode { | ||||||||
2611 | friend class ASTContext; // ASTContext creates these. | ||||||||
2612 | |||||||||
2613 | QualType Inner; | ||||||||
2614 | |||||||||
2615 | ParenType(QualType InnerType, QualType CanonType) | ||||||||
2616 | : Type(Paren, CanonType, InnerType->isDependentType(), | ||||||||
2617 | InnerType->isInstantiationDependentType(), | ||||||||
2618 | InnerType->isVariablyModifiedType(), | ||||||||
2619 | InnerType->containsUnexpandedParameterPack()), | ||||||||
2620 | Inner(InnerType) {} | ||||||||
2621 | |||||||||
2622 | public: | ||||||||
2623 | QualType getInnerType() const { return Inner; } | ||||||||
2624 | |||||||||
2625 | bool isSugared() const { return true; } | ||||||||
2626 | QualType desugar() const { return getInnerType(); } | ||||||||
2627 | |||||||||
2628 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||||
2629 | Profile(ID, getInnerType()); | ||||||||
2630 | } | ||||||||
2631 | |||||||||
2632 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Inner) { | ||||||||
2633 | Inner.Profile(ID); | ||||||||
2634 | } | ||||||||
2635 | |||||||||
2636 | static bool classof(const Type *T) { return T->getTypeClass() == Paren; } | ||||||||
2637 | }; | ||||||||
2638 | |||||||||
2639 | /// PointerType - C99 6.7.5.1 - Pointer Declarators. | ||||||||
2640 | class PointerType : public Type, public llvm::FoldingSetNode { | ||||||||
2641 | friend class ASTContext; // ASTContext creates these. | ||||||||
2642 | |||||||||
2643 | QualType PointeeType; | ||||||||
2644 | |||||||||
2645 | PointerType(QualType Pointee, QualType CanonicalPtr) | ||||||||
2646 | : Type(Pointer, CanonicalPtr, Pointee->isDependentType(), | ||||||||
2647 | Pointee->isInstantiationDependentType(), | ||||||||
2648 | Pointee->isVariablyModifiedType(), | ||||||||
2649 | Pointee->containsUnexpandedParameterPack()), | ||||||||
2650 | PointeeType(Pointee) {} | ||||||||
2651 | |||||||||
2652 | public: | ||||||||
2653 | QualType getPointeeType() const { return PointeeType; } | ||||||||
2654 | |||||||||
2655 | /// Returns true if address spaces of pointers overlap. | ||||||||
2656 | /// OpenCL v2.0 defines conversion rules for pointers to different | ||||||||
2657 | /// address spaces (OpenCLC v2.0 s6.5.5) and notion of overlapping | ||||||||
2658 | /// address spaces. | ||||||||
2659 | /// CL1.1 or CL1.2: | ||||||||
2660 | /// address spaces overlap iff they are they same. | ||||||||
2661 | /// CL2.0 adds: | ||||||||
2662 | /// __generic overlaps with any address space except for __constant. | ||||||||
2663 | bool isAddressSpaceOverlapping(const PointerType &other) const { | ||||||||
2664 | Qualifiers thisQuals = PointeeType.getQualifiers(); | ||||||||
2665 | Qualifiers otherQuals = other.getPointeeType().getQualifiers(); | ||||||||
2666 | // Address spaces overlap if at least one of them is a superset of another | ||||||||
2667 | return thisQuals.isAddressSpaceSupersetOf(otherQuals) || | ||||||||
2668 | otherQuals.isAddressSpaceSupersetOf(thisQuals); | ||||||||
2669 | } | ||||||||
2670 | |||||||||
2671 | bool isSugared() const { return false; } | ||||||||
2672 | QualType desugar() const { return QualType(this, 0); } | ||||||||
2673 | |||||||||
2674 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||||
2675 | Profile(ID, getPointeeType()); | ||||||||
2676 | } | ||||||||
2677 | |||||||||
2678 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { | ||||||||
2679 | ID.AddPointer(Pointee.getAsOpaquePtr()); | ||||||||
2680 | } | ||||||||
2681 | |||||||||
2682 | static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } | ||||||||
2683 | }; | ||||||||
2684 | |||||||||
2685 | /// Represents a type which was implicitly adjusted by the semantic | ||||||||
2686 | /// engine for arbitrary reasons. For example, array and function types can | ||||||||
2687 | /// decay, and function types can have their calling conventions adjusted. | ||||||||
2688 | class AdjustedType : public Type, public llvm::FoldingSetNode { | ||||||||
2689 | QualType OriginalTy; | ||||||||
2690 | QualType AdjustedTy; | ||||||||
2691 | |||||||||
2692 | protected: | ||||||||
2693 | friend class ASTContext; // ASTContext creates these. | ||||||||
2694 | |||||||||
2695 | AdjustedType(TypeClass TC, QualType OriginalTy, QualType AdjustedTy, | ||||||||
2696 | QualType CanonicalPtr) | ||||||||
2697 | : Type(TC, CanonicalPtr, OriginalTy->isDependentType(), | ||||||||
2698 | OriginalTy->isInstantiationDependentType(), | ||||||||
2699 | OriginalTy->isVariablyModifiedType(), | ||||||||
2700 | OriginalTy->containsUnexpandedParameterPack()), | ||||||||
2701 | OriginalTy(OriginalTy), AdjustedTy(AdjustedTy) {} | ||||||||
2702 | |||||||||
2703 | public: | ||||||||
2704 | QualType getOriginalType() const { return OriginalTy; } | ||||||||
2705 | QualType getAdjustedType() const { return AdjustedTy; } | ||||||||
2706 | |||||||||
2707 | bool isSugared() const { return true; } | ||||||||
2708 | QualType desugar() const { return AdjustedTy; } | ||||||||
2709 | |||||||||
2710 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||||
2711 | Profile(ID, OriginalTy, AdjustedTy); | ||||||||
2712 | } | ||||||||
2713 | |||||||||
2714 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Orig, QualType New) { | ||||||||
2715 | ID.AddPointer(Orig.getAsOpaquePtr()); | ||||||||
2716 | ID.AddPointer(New.getAsOpaquePtr()); | ||||||||
2717 | } | ||||||||
2718 | |||||||||
2719 | static bool classof(const Type *T) { | ||||||||
2720 | return T->getTypeClass() == Adjusted || T->getTypeClass() == Decayed; | ||||||||
2721 | } | ||||||||
2722 | }; | ||||||||
2723 | |||||||||
2724 | /// Represents a pointer type decayed from an array or function type. | ||||||||
2725 | class DecayedType : public AdjustedType { | ||||||||
2726 | friend class ASTContext; // ASTContext creates these. | ||||||||
2727 | |||||||||
2728 | inline | ||||||||
2729 | DecayedType(QualType OriginalType, QualType Decayed, QualType Canonical); | ||||||||
2730 | |||||||||
2731 | public: | ||||||||
2732 | QualType getDecayedType() const { return getAdjustedType(); } | ||||||||
2733 | |||||||||
2734 | inline QualType getPointeeType() const; | ||||||||
2735 | |||||||||
2736 | static bool classof(const Type *T) { return T->getTypeClass() == Decayed; } | ||||||||
2737 | }; | ||||||||
2738 | |||||||||
2739 | /// Pointer to a block type. | ||||||||
2740 | /// This type is to represent types syntactically represented as | ||||||||
2741 | /// "void (^)(int)", etc. Pointee is required to always be a function type. | ||||||||
2742 | class BlockPointerType : public Type, public llvm::FoldingSetNode { | ||||||||
2743 | friend class ASTContext; // ASTContext creates these. | ||||||||
2744 | |||||||||
2745 | // Block is some kind of pointer type | ||||||||
2746 | QualType PointeeType; | ||||||||
2747 | |||||||||
2748 | BlockPointerType(QualType Pointee, QualType CanonicalCls) | ||||||||
2749 | : Type(BlockPointer, CanonicalCls, Pointee->isDependentType(), | ||||||||
2750 | Pointee->isInstantiationDependentType(), | ||||||||
2751 | Pointee->isVariablyModifiedType(), | ||||||||
2752 | Pointee->containsUnexpandedParameterPack()), | ||||||||
2753 | PointeeType(Pointee) {} | ||||||||
2754 | |||||||||
2755 | public: | ||||||||
2756 | // Get the pointee type. Pointee is required to always be a function type. | ||||||||
2757 | QualType getPointeeType() const { return PointeeType; } | ||||||||
2758 | |||||||||
2759 | bool isSugared() const { return false; } | ||||||||
2760 | QualType desugar() const { return QualType(this, 0); } | ||||||||
2761 | |||||||||
2762 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||||
2763 | Profile(ID, getPointeeType()); | ||||||||
2764 | } | ||||||||
2765 | |||||||||
2766 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { | ||||||||
2767 | ID.AddPointer(Pointee.getAsOpaquePtr()); | ||||||||
2768 | } | ||||||||
2769 | |||||||||
2770 | static bool classof(const Type *T) { | ||||||||
2771 | return T->getTypeClass() == BlockPointer; | ||||||||
2772 | } | ||||||||
2773 | }; | ||||||||
2774 | |||||||||
2775 | /// Base for LValueReferenceType and RValueReferenceType | ||||||||
2776 | class ReferenceType : public Type, public llvm::FoldingSetNode { | ||||||||
2777 | QualType PointeeType; | ||||||||
2778 | |||||||||
2779 | protected: | ||||||||
2780 | ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, | ||||||||
2781 | bool SpelledAsLValue) | ||||||||
2782 | : Type(tc, CanonicalRef, Referencee->isDependentType(), | ||||||||
2783 | Referencee->isInstantiationDependentType(), | ||||||||
2784 | Referencee->isVariablyModifiedType(), | ||||||||
2785 | Referencee->containsUnexpandedParameterPack()), | ||||||||
2786 | PointeeType(Referencee) { | ||||||||
2787 | ReferenceTypeBits.SpelledAsLValue = SpelledAsLValue; | ||||||||
2788 | ReferenceTypeBits.InnerRef = Referencee->isReferenceType(); | ||||||||
2789 | } | ||||||||
2790 | |||||||||
2791 | public: | ||||||||
2792 | bool isSpelledAsLValue() const { return ReferenceTypeBits.SpelledAsLValue; } | ||||||||
2793 | bool isInnerRef() const { return ReferenceTypeBits.InnerRef; } | ||||||||
2794 | |||||||||
2795 | QualType getPointeeTypeAsWritten() const { return PointeeType; } | ||||||||
2796 | |||||||||
2797 | QualType getPointeeType() const { | ||||||||
2798 | // FIXME: this might strip inner qualifiers; okay? | ||||||||
2799 | const ReferenceType *T = this; | ||||||||
2800 | while (T->isInnerRef()) | ||||||||
2801 | T = T->PointeeType->castAs<ReferenceType>(); | ||||||||
2802 | return T->PointeeType; | ||||||||
2803 | } | ||||||||
2804 | |||||||||
2805 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||||
2806 | Profile(ID, PointeeType, isSpelledAsLValue()); | ||||||||
2807 | } | ||||||||
2808 | |||||||||
2809 | static void Profile(llvm::FoldingSetNodeID &ID, | ||||||||
2810 | QualType Referencee, | ||||||||
2811 | bool SpelledAsLValue) { | ||||||||
2812 | ID.AddPointer(Referencee.getAsOpaquePtr()); | ||||||||
2813 | ID.AddBoolean(SpelledAsLValue); | ||||||||
2814 | } | ||||||||
2815 | |||||||||
2816 | static bool classof(const Type *T) { | ||||||||
2817 | return T->getTypeClass() == LValueReference || | ||||||||
2818 | T->getTypeClass() == RValueReference; | ||||||||
2819 | } | ||||||||
2820 | }; | ||||||||
2821 | |||||||||
2822 | /// An lvalue reference type, per C++11 [dcl.ref]. | ||||||||
2823 | class LValueReferenceType : public ReferenceType { | ||||||||
2824 | friend class ASTContext; // ASTContext creates these | ||||||||
2825 | |||||||||
2826 | LValueReferenceType(QualType Referencee, QualType CanonicalRef, | ||||||||
2827 | bool SpelledAsLValue) | ||||||||
2828 | : ReferenceType(LValueReference, Referencee, CanonicalRef, | ||||||||
2829 | SpelledAsLValue) {} | ||||||||
2830 | |||||||||
2831 | public: | ||||||||
2832 | bool isSugared() const { return false; } | ||||||||
2833 | QualType desugar() const { return QualType(this, 0); } | ||||||||
2834 | |||||||||
2835 | static bool classof(const Type *T) { | ||||||||
2836 | return T->getTypeClass() == LValueReference; | ||||||||
2837 | } | ||||||||
2838 | }; | ||||||||
2839 | |||||||||
2840 | /// An rvalue reference type, per C++11 [dcl.ref]. | ||||||||
2841 | class RValueReferenceType : public ReferenceType { | ||||||||
2842 | friend class ASTContext; // ASTContext creates these | ||||||||
2843 | |||||||||
2844 | RValueReferenceType(QualType Referencee, QualType CanonicalRef) | ||||||||
2845 | : ReferenceType(RValueReference, Referencee, CanonicalRef, false) {} | ||||||||
2846 | |||||||||
2847 | public: | ||||||||
2848 | bool isSugared() const { return false; } | ||||||||
2849 | QualType desugar() const { return QualType(this, 0); } | ||||||||
2850 | |||||||||
2851 | static bool classof(const Type *T) { | ||||||||
2852 | return T->getTypeClass() == RValueReference; | ||||||||
2853 | } | ||||||||
2854 | }; | ||||||||
2855 | |||||||||
2856 | /// A pointer to member type per C++ 8.3.3 - Pointers to members. | ||||||||
2857 | /// | ||||||||
2858 | /// This includes both pointers to data members and pointer to member functions. | ||||||||
2859 | class MemberPointerType : public Type, public llvm::FoldingSetNode { | ||||||||
2860 | friend class ASTContext; // ASTContext creates these. | ||||||||
2861 | |||||||||
2862 | QualType PointeeType; | ||||||||
2863 | |||||||||
2864 | /// The class of which the pointee is a member. Must ultimately be a | ||||||||
2865 | /// RecordType, but could be a typedef or a template parameter too. | ||||||||
2866 | const Type *Class; | ||||||||
2867 | |||||||||
2868 | MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) | ||||||||
2869 | : Type(MemberPointer, CanonicalPtr, | ||||||||
2870 | Cls->isDependentType() || Pointee->isDependentType(), | ||||||||
2871 | (Cls->isInstantiationDependentType() || | ||||||||
2872 | Pointee->isInstantiationDependentType()), | ||||||||
2873 | Pointee->isVariablyModifiedType(), | ||||||||
2874 | (Cls->containsUnexpandedParameterPack() || | ||||||||
2875 | Pointee->containsUnexpandedParameterPack())), | ||||||||
2876 | PointeeType(Pointee), Class(Cls) {} | ||||||||
2877 | |||||||||
2878 | public: | ||||||||
2879 | QualType getPointeeType() const { return PointeeType; } | ||||||||
2880 | |||||||||
2881 | /// Returns true if the member type (i.e. the pointee type) is a | ||||||||
2882 | /// function type rather than a data-member type. | ||||||||
2883 | bool isMemberFunctionPointer() const { | ||||||||
2884 | return PointeeType->isFunctionProtoType(); | ||||||||
2885 | } | ||||||||
2886 | |||||||||
2887 | /// Returns true if the member type (i.e. the pointee type) is a | ||||||||
2888 | /// data type rather than a function type. | ||||||||
2889 | bool isMemberDataPointer() const { | ||||||||
2890 | return !PointeeType->isFunctionProtoType(); | ||||||||
2891 | } | ||||||||
2892 | |||||||||
2893 | const Type *getClass() const { return Class; } | ||||||||
2894 | CXXRecordDecl *getMostRecentCXXRecordDecl() const; | ||||||||
2895 | |||||||||
2896 | bool isSugared() const { return false; } | ||||||||
2897 | QualType desugar() const { return QualType(this, 0); } | ||||||||
2898 | |||||||||
2899 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||||
2900 | Profile(ID, getPointeeType(), getClass()); | ||||||||
2901 | } | ||||||||
2902 | |||||||||
2903 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, | ||||||||
2904 | const Type *Class) { | ||||||||
2905 | ID.AddPointer(Pointee.getAsOpaquePtr()); | ||||||||
2906 | ID.AddPointer(Class); | ||||||||
2907 | } | ||||||||
2908 | |||||||||
2909 | static bool classof(const Type *T) { | ||||||||
2910 | return T->getTypeClass() == MemberPointer; | ||||||||
2911 | } | ||||||||
2912 | }; | ||||||||
2913 | |||||||||
2914 | /// Represents an array type, per C99 6.7.5.2 - Array Declarators. | ||||||||
2915 | class ArrayType : public Type, public llvm::FoldingSetNode { | ||||||||
2916 | public: | ||||||||
2917 | /// Capture whether this is a normal array (e.g. int X[4]) | ||||||||
2918 | /// an array with a static size (e.g. int X[static 4]), or an array | ||||||||
2919 | /// with a star size (e.g. int X[*]). | ||||||||
2920 | /// 'static' is only allowed on function parameters. | ||||||||
2921 | enum ArraySizeModifier { | ||||||||
2922 | Normal, Static, Star | ||||||||
2923 | }; | ||||||||
2924 | |||||||||
2925 | private: | ||||||||
2926 | /// The element type of the array. | ||||||||
2927 | QualType ElementType; | ||||||||
2928 | |||||||||
2929 | protected: | ||||||||
2930 | friend class ASTContext; // ASTContext creates these. | ||||||||
2931 | |||||||||
2932 | ArrayType(TypeClass tc, QualType et, QualType can, ArraySizeModifier sm, | ||||||||
2933 | unsigned tq, const Expr *sz = nullptr); | ||||||||
2934 | |||||||||
2935 | public: | ||||||||
2936 | QualType getElementType() const { return ElementType; } | ||||||||
2937 | |||||||||
2938 | ArraySizeModifier getSizeModifier() const { | ||||||||
2939 | return ArraySizeModifier(ArrayTypeBits.SizeModifier); | ||||||||
2940 | } | ||||||||
2941 | |||||||||
2942 | Qualifiers getIndexTypeQualifiers() const { | ||||||||
2943 | return Qualifiers::fromCVRMask(getIndexTypeCVRQualifiers()); | ||||||||
2944 | } | ||||||||
2945 | |||||||||
2946 | unsigned getIndexTypeCVRQualifiers() const { | ||||||||
2947 | return ArrayTypeBits.IndexTypeQuals; | ||||||||
2948 | } | ||||||||
2949 | |||||||||
2950 | static bool classof(const Type *T) { | ||||||||
2951 | return T->getTypeClass() == ConstantArray || | ||||||||
2952 | T->getTypeClass() == VariableArray || | ||||||||
2953 | T->getTypeClass() == IncompleteArray || | ||||||||
2954 | T->getTypeClass() == DependentSizedArray; | ||||||||
2955 | } | ||||||||
2956 | }; | ||||||||
2957 | |||||||||
2958 | /// Represents the canonical version of C arrays with a specified constant size. | ||||||||
2959 | /// For example, the canonical type for 'int A[4 + 4*100]' is a | ||||||||
2960 | /// ConstantArrayType where the element type is 'int' and the size is 404. | ||||||||
2961 | class ConstantArrayType final | ||||||||
2962 | : public ArrayType, | ||||||||
2963 | private llvm::TrailingObjects<ConstantArrayType, const Expr *> { | ||||||||
2964 | friend class ASTContext; // ASTContext creates these. | ||||||||
2965 | friend TrailingObjects; | ||||||||
2966 | |||||||||
2967 | llvm::APInt Size; // Allows us to unique the type. | ||||||||
2968 | |||||||||
2969 | ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, | ||||||||
2970 | const Expr *sz, ArraySizeModifier sm, unsigned tq) | ||||||||
2971 | : ArrayType(ConstantArray, et, can, sm, tq, sz), Size(size) { | ||||||||
2972 | ConstantArrayTypeBits.HasStoredSizeExpr = sz != nullptr; | ||||||||
2973 | if (ConstantArrayTypeBits.HasStoredSizeExpr) { | ||||||||
2974 | assert(!can.isNull() && "canonical constant array should not have size")((!can.isNull() && "canonical constant array should not have size" ) ? static_cast<void> (0) : __assert_fail ("!can.isNull() && \"canonical constant array should not have size\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 2974, __PRETTY_FUNCTION__)); | ||||||||
2975 | *getTrailingObjects<const Expr*>() = sz; | ||||||||
2976 | } | ||||||||
2977 | } | ||||||||
2978 | |||||||||
2979 | unsigned numTrailingObjects(OverloadToken<const Expr*>) const { | ||||||||
2980 | return ConstantArrayTypeBits.HasStoredSizeExpr; | ||||||||
2981 | } | ||||||||
2982 | |||||||||
2983 | public: | ||||||||
2984 | const llvm::APInt &getSize() const { return Size; } | ||||||||
2985 | const Expr *getSizeExpr() const { | ||||||||
2986 | return ConstantArrayTypeBits.HasStoredSizeExpr | ||||||||
2987 | ? *getTrailingObjects<const Expr *>() | ||||||||
2988 | : nullptr; | ||||||||
2989 | } | ||||||||
2990 | bool isSugared() const { return false; } | ||||||||
2991 | QualType desugar() const { return QualType(this, 0); } | ||||||||
2992 | |||||||||
2993 | /// Determine the number of bits required to address a member of | ||||||||
2994 | // an array with the given element type and number of elements. | ||||||||
2995 | static unsigned getNumAddressingBits(const ASTContext &Context, | ||||||||
2996 | QualType ElementType, | ||||||||
2997 | const llvm::APInt &NumElements); | ||||||||
2998 | |||||||||
2999 | /// Determine the maximum number of active bits that an array's size | ||||||||
3000 | /// can require, which limits the maximum size of the array. | ||||||||
3001 | static unsigned getMaxSizeBits(const ASTContext &Context); | ||||||||
3002 | |||||||||
3003 | void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) { | ||||||||
3004 | Profile(ID, Ctx, getElementType(), getSize(), getSizeExpr(), | ||||||||
3005 | getSizeModifier(), getIndexTypeCVRQualifiers()); | ||||||||
3006 | } | ||||||||
3007 | |||||||||
3008 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx, | ||||||||
3009 | QualType ET, const llvm::APInt &ArraySize, | ||||||||
3010 | const Expr *SizeExpr, ArraySizeModifier SizeMod, | ||||||||
3011 | unsigned TypeQuals); | ||||||||
3012 | |||||||||
3013 | static bool classof(const Type *T) { | ||||||||
3014 | return T->getTypeClass() == ConstantArray; | ||||||||
3015 | } | ||||||||
3016 | }; | ||||||||
3017 | |||||||||
3018 | /// Represents a C array with an unspecified size. For example 'int A[]' has | ||||||||
3019 | /// an IncompleteArrayType where the element type is 'int' and the size is | ||||||||
3020 | /// unspecified. | ||||||||
3021 | class IncompleteArrayType : public ArrayType { | ||||||||
3022 | friend class ASTContext; // ASTContext creates these. | ||||||||
3023 | |||||||||
3024 | IncompleteArrayType(QualType et, QualType can, | ||||||||
3025 | ArraySizeModifier sm, unsigned tq) | ||||||||
3026 | : ArrayType(IncompleteArray, et, can, sm, tq) {} | ||||||||
3027 | |||||||||
3028 | public: | ||||||||
3029 | friend class StmtIteratorBase; | ||||||||
3030 | |||||||||
3031 | bool isSugared() const { return false; } | ||||||||
3032 | QualType desugar() const { return QualType(this, 0); } | ||||||||
3033 | |||||||||
3034 | static bool classof(const Type *T) { | ||||||||
3035 | return T->getTypeClass() == IncompleteArray; | ||||||||
3036 | } | ||||||||
3037 | |||||||||
3038 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||||
3039 | Profile(ID, getElementType(), getSizeModifier(), | ||||||||
3040 | getIndexTypeCVRQualifiers()); | ||||||||
3041 | } | ||||||||
3042 | |||||||||
3043 | static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, | ||||||||
3044 | ArraySizeModifier SizeMod, unsigned TypeQuals) { | ||||||||
3045 | ID.AddPointer(ET.getAsOpaquePtr()); | ||||||||
3046 | ID.AddInteger(SizeMod); | ||||||||
3047 | ID.AddInteger(TypeQuals); | ||||||||
3048 | } | ||||||||
3049 | }; | ||||||||
3050 | |||||||||
3051 | /// Represents a C array with a specified size that is not an | ||||||||
3052 | /// integer-constant-expression. For example, 'int s[x+foo()]'. | ||||||||
3053 | /// Since the size expression is an arbitrary expression, we store it as such. | ||||||||
3054 | /// | ||||||||
3055 | /// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and | ||||||||
3056 | /// should not be: two lexically equivalent variable array types could mean | ||||||||
3057 | /// different things, for example, these variables do not have the same type | ||||||||
3058 | /// dynamically: | ||||||||
3059 | /// | ||||||||
3060 | /// void foo(int x) { | ||||||||
3061 | /// int Y[x]; | ||||||||
3062 | /// ++x; | ||||||||
3063 | /// int Z[x]; | ||||||||
3064 | /// } | ||||||||
3065 | class VariableArrayType : public ArrayType { | ||||||||
3066 | friend class ASTContext; // ASTContext creates these. | ||||||||
3067 | |||||||||
3068 | /// An assignment-expression. VLA's are only permitted within | ||||||||
3069 | /// a function block. | ||||||||
3070 | Stmt *SizeExpr; | ||||||||
3071 | |||||||||
3072 | /// The range spanned by the left and right array brackets. | ||||||||
3073 | SourceRange Brackets; | ||||||||
3074 | |||||||||
3075 | VariableArrayType(QualType et, QualType can, Expr *e, | ||||||||
3076 | ArraySizeModifier sm, unsigned tq, | ||||||||
3077 | SourceRange brackets) | ||||||||
3078 | : ArrayType(VariableArray, et, can, sm, tq, e), | ||||||||
3079 | SizeExpr((Stmt*) e), Brackets(brackets) {} | ||||||||
3080 | |||||||||
3081 | public: | ||||||||
3082 | friend class StmtIteratorBase; | ||||||||
3083 | |||||||||
3084 | Expr *getSizeExpr() const { | ||||||||
3085 | // We use C-style casts instead of cast<> here because we do not wish | ||||||||
3086 | // to have a dependency of Type.h on Stmt.h/Expr.h. | ||||||||
3087 | return (Expr*) SizeExpr; | ||||||||
3088 | } | ||||||||
3089 | |||||||||
3090 | SourceRange getBracketsRange() const { return Brackets; } | ||||||||
3091 | SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } | ||||||||
3092 | SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } | ||||||||
3093 | |||||||||
3094 | bool isSugared() const { return false; } | ||||||||
3095 | QualType desugar() const { return QualType(this, 0); } | ||||||||
3096 | |||||||||
3097 | static bool classof(const Type *T) { | ||||||||
3098 | return T->getTypeClass() == VariableArray; | ||||||||
3099 | } | ||||||||
3100 | |||||||||
3101 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||||
3102 | llvm_unreachable("Cannot unique VariableArrayTypes.")::llvm::llvm_unreachable_internal("Cannot unique VariableArrayTypes." , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 3102); | ||||||||
3103 | } | ||||||||
3104 | }; | ||||||||
3105 | |||||||||
3106 | /// Represents an array type in C++ whose size is a value-dependent expression. | ||||||||
3107 | /// | ||||||||
3108 | /// For example: | ||||||||
3109 | /// \code | ||||||||
3110 | /// template<typename T, int Size> | ||||||||
3111 | /// class array { | ||||||||
3112 | /// T data[Size]; | ||||||||
3113 | /// }; | ||||||||
3114 | /// \endcode | ||||||||
3115 | /// | ||||||||
3116 | /// For these types, we won't actually know what the array bound is | ||||||||
3117 | /// until template instantiation occurs, at which point this will | ||||||||
3118 | /// become either a ConstantArrayType or a VariableArrayType. | ||||||||
3119 | class DependentSizedArrayType : public ArrayType { | ||||||||
3120 | friend class ASTContext; // ASTContext creates these. | ||||||||
3121 | |||||||||
3122 | const ASTContext &Context; | ||||||||
3123 | |||||||||
3124 | /// An assignment expression that will instantiate to the | ||||||||
3125 | /// size of the array. | ||||||||
3126 | /// | ||||||||
3127 | /// The expression itself might be null, in which case the array | ||||||||
3128 | /// type will have its size deduced from an initializer. | ||||||||
3129 | Stmt *SizeExpr; | ||||||||
3130 | |||||||||
3131 | /// The range spanned by the left and right array brackets. | ||||||||
3132 | SourceRange Brackets; | ||||||||
3133 | |||||||||
3134 | DependentSizedArrayType(const ASTContext &Context, QualType et, QualType can, | ||||||||
3135 | Expr *e, ArraySizeModifier sm, unsigned tq, | ||||||||
3136 | SourceRange brackets); | ||||||||
3137 | |||||||||
3138 | public: | ||||||||
3139 | friend class StmtIteratorBase; | ||||||||
3140 | |||||||||
3141 | Expr *getSizeExpr() const { | ||||||||
3142 | // We use C-style casts instead of cast<> here because we do not wish | ||||||||
3143 | // to have a dependency of Type.h on Stmt.h/Expr.h. | ||||||||
3144 | return (Expr*) SizeExpr; | ||||||||
3145 | } | ||||||||
3146 | |||||||||
3147 | SourceRange getBracketsRange() const { return Brackets; } | ||||||||
3148 | SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } | ||||||||
3149 | SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } | ||||||||
3150 | |||||||||
3151 | bool isSugared() const { return false; } | ||||||||
3152 | QualType desugar() const { return QualType(this, 0); } | ||||||||
3153 | |||||||||
3154 | static bool classof(const Type *T) { | ||||||||
3155 | return T->getTypeClass() == DependentSizedArray; | ||||||||
3156 | } | ||||||||
3157 | |||||||||
3158 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||||
3159 | Profile(ID, Context, getElementType(), | ||||||||
3160 | getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); | ||||||||
3161 | } | ||||||||
3162 | |||||||||
3163 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, | ||||||||
3164 | QualType ET, ArraySizeModifier SizeMod, | ||||||||
3165 | unsigned TypeQuals, Expr *E); | ||||||||
3166 | }; | ||||||||
3167 | |||||||||
3168 | /// Represents an extended address space qualifier where the input address space | ||||||||
3169 | /// value is dependent. Non-dependent address spaces are not represented with a | ||||||||
3170 | /// special Type subclass; they are stored on an ExtQuals node as part of a QualType. | ||||||||
3171 | /// | ||||||||
3172 | /// For example: | ||||||||
3173 | /// \code | ||||||||
3174 | /// template<typename T, int AddrSpace> | ||||||||
3175 | /// class AddressSpace { | ||||||||
3176 | /// typedef T __attribute__((address_space(AddrSpace))) type; | ||||||||
3177 | /// } | ||||||||
3178 | /// \endcode | ||||||||
3179 | class DependentAddressSpaceType : public Type, public llvm::FoldingSetNode { | ||||||||
3180 | friend class ASTContext; | ||||||||
3181 | |||||||||
3182 | const ASTContext &Context; | ||||||||
3183 | Expr *AddrSpaceExpr; | ||||||||
3184 | QualType PointeeType; | ||||||||
3185 | SourceLocation loc; | ||||||||
3186 | |||||||||
3187 | DependentAddressSpaceType(const ASTContext &Context, QualType PointeeType, | ||||||||
3188 | QualType can, Expr *AddrSpaceExpr, | ||||||||
3189 | SourceLocation loc); | ||||||||
3190 | |||||||||
3191 | public: | ||||||||
3192 | Expr *getAddrSpaceExpr() const { return AddrSpaceExpr; } | ||||||||
3193 | QualType getPointeeType() const { return PointeeType; } | ||||||||
3194 | SourceLocation getAttributeLoc() const { return loc; } | ||||||||
3195 | |||||||||
3196 | bool isSugared() const { return false; } | ||||||||
3197 | QualType desugar() const { return QualType(this, 0); } | ||||||||
3198 | |||||||||
3199 | static bool classof(const Type *T) { | ||||||||
3200 | return T->getTypeClass() == DependentAddressSpace; | ||||||||
3201 | } | ||||||||
3202 | |||||||||
3203 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||||
3204 | Profile(ID, Context, getPointeeType(), getAddrSpaceExpr()); | ||||||||
3205 | } | ||||||||
3206 | |||||||||
3207 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, | ||||||||
3208 | QualType PointeeType, Expr *AddrSpaceExpr); | ||||||||
3209 | }; | ||||||||
3210 | |||||||||
3211 | /// Represents an extended vector type where either the type or size is | ||||||||
3212 | /// dependent. | ||||||||
3213 | /// | ||||||||
3214 | /// For example: | ||||||||
3215 | /// \code | ||||||||
3216 | /// template<typename T, int Size> | ||||||||
3217 | /// class vector { | ||||||||
3218 | /// typedef T __attribute__((ext_vector_type(Size))) type; | ||||||||
3219 | /// } | ||||||||
3220 | /// \endcode | ||||||||
3221 | class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { | ||||||||
3222 | friend class ASTContext; | ||||||||
3223 | |||||||||
3224 | const ASTContext &Context; | ||||||||
3225 | Expr *SizeExpr; | ||||||||
3226 | |||||||||
3227 | /// The element type of the array. | ||||||||
3228 | QualType ElementType; | ||||||||
3229 | |||||||||
3230 | SourceLocation loc; | ||||||||
3231 | |||||||||
3232 | DependentSizedExtVectorType(const ASTContext &Context, QualType ElementType, | ||||||||
3233 | QualType can, Expr *SizeExpr, SourceLocation loc); | ||||||||
3234 | |||||||||
3235 | public: | ||||||||
3236 | Expr *getSizeExpr() const { return SizeExpr; } | ||||||||
3237 | QualType getElementType() const { return ElementType; } | ||||||||
3238 | SourceLocation getAttributeLoc() const { return loc; } | ||||||||
3239 | |||||||||
3240 | bool isSugared() const { return false; } | ||||||||
3241 | QualType desugar() const { return QualType(this, 0); } | ||||||||
3242 | |||||||||
3243 | static bool classof(const Type *T) { | ||||||||
3244 | return T->getTypeClass() == DependentSizedExtVector; | ||||||||
3245 | } | ||||||||
3246 | |||||||||
3247 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||||
3248 | Profile(ID, Context, getElementType(), getSizeExpr()); | ||||||||
3249 | } | ||||||||
3250 | |||||||||
3251 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, | ||||||||
3252 | QualType ElementType, Expr *SizeExpr); | ||||||||
3253 | }; | ||||||||
3254 | |||||||||
3255 | |||||||||
3256 | /// Represents a GCC generic vector type. This type is created using | ||||||||
3257 | /// __attribute__((vector_size(n)), where "n" specifies the vector size in | ||||||||
3258 | /// bytes; or from an Altivec __vector or vector declaration. | ||||||||
3259 | /// Since the constructor takes the number of vector elements, the | ||||||||
3260 | /// client is responsible for converting the size into the number of elements. | ||||||||
3261 | class VectorType : public Type, public llvm::FoldingSetNode { | ||||||||
3262 | public: | ||||||||
3263 | enum VectorKind { | ||||||||
3264 | /// not a target-specific vector type | ||||||||
3265 | GenericVector, | ||||||||
3266 | |||||||||
3267 | /// is AltiVec vector | ||||||||
3268 | AltiVecVector, | ||||||||
3269 | |||||||||
3270 | /// is AltiVec 'vector Pixel' | ||||||||
3271 | AltiVecPixel, | ||||||||
3272 | |||||||||
3273 | /// is AltiVec 'vector bool ...' | ||||||||
3274 | AltiVecBool, | ||||||||
3275 | |||||||||
3276 | /// is ARM Neon vector | ||||||||
3277 | NeonVector, | ||||||||
3278 | |||||||||
3279 | /// is ARM Neon polynomial vector | ||||||||
3280 | NeonPolyVector | ||||||||
3281 | }; | ||||||||
3282 | |||||||||
3283 | protected: | ||||||||
3284 | friend class ASTContext; // ASTContext creates these. | ||||||||
3285 | |||||||||
3286 | /// The element type of the vector. | ||||||||
3287 | QualType ElementType; | ||||||||
3288 | |||||||||
3289 | VectorType(QualType vecType, unsigned nElements, QualType canonType, | ||||||||
3290 | VectorKind vecKind); | ||||||||
3291 | |||||||||
3292 | VectorType(TypeClass tc, QualType vecType, unsigned nElements, | ||||||||
3293 | QualType canonType, VectorKind vecKind); | ||||||||
3294 | |||||||||
3295 | public: | ||||||||
3296 | QualType getElementType() const { return ElementType; } | ||||||||
3297 | unsigned getNumElements() const { return VectorTypeBits.NumElements; } | ||||||||
3298 | |||||||||
3299 | static bool isVectorSizeTooLarge(unsigned NumElements) { | ||||||||
3300 | return NumElements > VectorTypeBitfields::MaxNumElements; | ||||||||
3301 | } | ||||||||
3302 | |||||||||
3303 | bool isSugared() const { return false; } | ||||||||
3304 | QualType desugar() const { return QualType(this, 0); } | ||||||||
3305 | |||||||||
3306 | VectorKind getVectorKind() const { | ||||||||
3307 | return VectorKind(VectorTypeBits.VecKind); | ||||||||
3308 | } | ||||||||
3309 | |||||||||
3310 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||||
3311 | Profile(ID, getElementType(), getNumElements(), | ||||||||
3312 | getTypeClass(), getVectorKind()); | ||||||||
3313 | } | ||||||||
3314 | |||||||||
3315 | static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, | ||||||||
3316 | unsigned NumElements, TypeClass TypeClass, | ||||||||
3317 | VectorKind VecKind) { | ||||||||
3318 | ID.AddPointer(ElementType.getAsOpaquePtr()); | ||||||||
3319 | ID.AddInteger(NumElements); | ||||||||
3320 | ID.AddInteger(TypeClass); | ||||||||
3321 | ID.AddInteger(VecKind); | ||||||||
3322 | } | ||||||||
3323 | |||||||||
3324 | static bool classof(const Type *T) { | ||||||||
3325 | return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; | ||||||||
3326 | } | ||||||||
3327 | }; | ||||||||
3328 | |||||||||
3329 | /// Represents a vector type where either the type or size is dependent. | ||||||||
3330 | //// | ||||||||
3331 | /// For example: | ||||||||
3332 | /// \code | ||||||||
3333 | /// template<typename T, int Size> | ||||||||
3334 | /// class vector { | ||||||||
3335 | /// typedef T __attribute__((vector_size(Size))) type; | ||||||||
3336 | /// } | ||||||||
3337 | /// \endcode | ||||||||
3338 | class DependentVectorType : public Type, public llvm::FoldingSetNode { | ||||||||
3339 | friend class ASTContext; | ||||||||
3340 | |||||||||
3341 | const ASTContext &Context; | ||||||||
3342 | QualType ElementType; | ||||||||
3343 | Expr *SizeExpr; | ||||||||
3344 | SourceLocation Loc; | ||||||||
3345 | |||||||||
3346 | DependentVectorType(const ASTContext &Context, QualType ElementType, | ||||||||
3347 | QualType CanonType, Expr *SizeExpr, | ||||||||
3348 | SourceLocation Loc, VectorType::VectorKind vecKind); | ||||||||
3349 | |||||||||
3350 | public: | ||||||||
3351 | Expr *getSizeExpr() const { return SizeExpr; } | ||||||||
3352 | QualType getElementType() const { return ElementType; } | ||||||||
3353 | SourceLocation getAttributeLoc() const { return Loc; } | ||||||||
3354 | VectorType::VectorKind getVectorKind() const { | ||||||||
3355 | return VectorType::VectorKind(VectorTypeBits.VecKind); | ||||||||
3356 | } | ||||||||
3357 | |||||||||
3358 | bool isSugared() const { return false; } | ||||||||
3359 | QualType desugar() const { return QualType(this, 0); } | ||||||||
3360 | |||||||||
3361 | static bool classof(const Type *T) { | ||||||||
3362 | return T->getTypeClass() == DependentVector; | ||||||||
3363 | } | ||||||||
3364 | |||||||||
3365 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||||
3366 | Profile(ID, Context, getElementType(), getSizeExpr(), getVectorKind()); | ||||||||
3367 | } | ||||||||
3368 | |||||||||
3369 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, | ||||||||
3370 | QualType ElementType, const Expr *SizeExpr, | ||||||||
3371 | VectorType::VectorKind VecKind); | ||||||||
3372 | }; | ||||||||
3373 | |||||||||
3374 | /// ExtVectorType - Extended vector type. This type is created using | ||||||||
3375 | /// __attribute__((ext_vector_type(n)), where "n" is the number of elements. | ||||||||
3376 | /// Unlike vector_size, ext_vector_type is only allowed on typedef's. This | ||||||||
3377 | /// class enables syntactic extensions, like Vector Components for accessing | ||||||||
3378 | /// points (as .xyzw), colors (as .rgba), and textures (modeled after OpenGL | ||||||||
3379 | /// Shading Language). | ||||||||
3380 | class ExtVectorType : public VectorType { | ||||||||
3381 | friend class ASTContext; // ASTContext creates these. | ||||||||
3382 | |||||||||
3383 | ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) | ||||||||
3384 | : VectorType(ExtVector, vecType, nElements, canonType, GenericVector) {} | ||||||||
3385 | |||||||||
3386 | public: | ||||||||
3387 | static int getPointAccessorIdx(char c) { | ||||||||
3388 | switch (c) { | ||||||||
3389 | default: return -1; | ||||||||
3390 | case 'x': case 'r': return 0; | ||||||||
3391 | case 'y': case 'g': return 1; | ||||||||
3392 | case 'z': case 'b': return 2; | ||||||||
3393 | case 'w': case 'a': return 3; | ||||||||
3394 | } | ||||||||
3395 | } | ||||||||
3396 | |||||||||
3397 | static int getNumericAccessorIdx(char c) { | ||||||||
3398 | switch (c) { | ||||||||
3399 | default: return -1; | ||||||||
3400 | case '0': return 0; | ||||||||
3401 | case '1': return 1; | ||||||||
3402 | case '2': return 2; | ||||||||
3403 | case '3': return 3; | ||||||||
3404 | case '4': return 4; | ||||||||
3405 | case '5': return 5; | ||||||||
3406 | case '6': return 6; | ||||||||
3407 | case '7': return 7; | ||||||||
3408 | case '8': return 8; | ||||||||
3409 | case '9': return 9; | ||||||||
3410 | case 'A': | ||||||||
3411 | case 'a': return 10; | ||||||||
3412 | case 'B': | ||||||||
3413 | case 'b': return 11; | ||||||||
3414 | case 'C': | ||||||||
3415 | case 'c': return 12; | ||||||||
3416 | case 'D': | ||||||||
3417 | case 'd': return 13; | ||||||||
3418 | case 'E': | ||||||||
3419 | case 'e': return 14; | ||||||||
3420 | case 'F': | ||||||||
3421 | case 'f': return 15; | ||||||||
3422 | } | ||||||||
3423 | } | ||||||||
3424 | |||||||||
3425 | static int getAccessorIdx(char c, bool isNumericAccessor) { | ||||||||
3426 | if (isNumericAccessor) | ||||||||
3427 | return getNumericAccessorIdx(c); | ||||||||
3428 | else | ||||||||
3429 | return getPointAccessorIdx(c); | ||||||||
3430 | } | ||||||||
3431 | |||||||||
3432 | bool isAccessorWithinNumElements(char c, bool isNumericAccessor) const { | ||||||||
3433 | if (int idx = getAccessorIdx(c, isNumericAccessor)+1) | ||||||||
3434 | return unsigned(idx-1) < getNumElements(); | ||||||||
3435 | return false; | ||||||||
3436 | } | ||||||||
3437 | |||||||||
3438 | bool isSugared() const { return false; } | ||||||||
3439 | QualType desugar() const { return QualType(this, 0); } | ||||||||
3440 | |||||||||
3441 | static bool classof(const Type *T) { | ||||||||
3442 | return T->getTypeClass() == ExtVector; | ||||||||
3443 | } | ||||||||
3444 | }; | ||||||||
3445 | |||||||||
3446 | /// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base | ||||||||
3447 | /// class of FunctionNoProtoType and FunctionProtoType. | ||||||||
3448 | class FunctionType : public Type { | ||||||||
3449 | // The type returned by the function. | ||||||||
3450 | QualType ResultType; | ||||||||
3451 | |||||||||
3452 | public: | ||||||||
3453 | /// Interesting information about a specific parameter that can't simply | ||||||||
3454 | /// be reflected in parameter's type. This is only used by FunctionProtoType | ||||||||
3455 | /// but is in FunctionType to make this class available during the | ||||||||
3456 | /// specification of the bases of FunctionProtoType. | ||||||||
3457 | /// | ||||||||
3458 | /// It makes sense to model language features this way when there's some | ||||||||
3459 | /// sort of parameter-specific override (such as an attribute) that | ||||||||
3460 | /// affects how the function is called. For example, the ARC ns_consumed | ||||||||
3461 | /// attribute changes whether a parameter is passed at +0 (the default) | ||||||||
3462 | /// or +1 (ns_consumed). This must be reflected in the function type, | ||||||||
3463 | /// but isn't really a change to the parameter type. | ||||||||
3464 | /// | ||||||||
3465 | /// One serious disadvantage of modelling language features this way is | ||||||||
3466 | /// that they generally do not work with language features that attempt | ||||||||
3467 | /// to destructure types. For example, template argument deduction will | ||||||||
3468 | /// not be able to match a parameter declared as | ||||||||
3469 | /// T (*)(U) | ||||||||
3470 | /// against an argument of type | ||||||||
3471 | /// void (*)(__attribute__((ns_consumed)) id) | ||||||||
3472 | /// because the substitution of T=void, U=id into the former will | ||||||||
3473 | /// not produce the latter. | ||||||||
3474 | class ExtParameterInfo { | ||||||||
3475 | enum { | ||||||||
3476 | ABIMask = 0x0F, | ||||||||
3477 | IsConsumed = 0x10, | ||||||||
3478 | HasPassObjSize = 0x20, | ||||||||
3479 | IsNoEscape = 0x40, | ||||||||
3480 | }; | ||||||||
3481 | unsigned char Data = 0; | ||||||||
3482 | |||||||||
3483 | public: | ||||||||
3484 | ExtParameterInfo() = default; | ||||||||
3485 | |||||||||
3486 | /// Return the ABI treatment of this parameter. | ||||||||
3487 | ParameterABI getABI() const { return ParameterABI(Data & ABIMask); } | ||||||||
3488 | ExtParameterInfo withABI(ParameterABI kind) const { | ||||||||
3489 | ExtParameterInfo copy = *this; | ||||||||
3490 | copy.Data = (copy.Data & ~ABIMask) | unsigned(kind); | ||||||||
3491 | return copy; | ||||||||
3492 | } | ||||||||
3493 | |||||||||
3494 | /// Is this parameter considered "consumed" by Objective-C ARC? | ||||||||
3495 | /// Consumed parameters must have retainable object type. | ||||||||
3496 | bool isConsumed() const { return (Data & IsConsumed); } | ||||||||
3497 | ExtParameterInfo withIsConsumed(bool consumed) const { | ||||||||
3498 | ExtParameterInfo copy = *this; | ||||||||
3499 | if (consumed) | ||||||||
3500 | copy.Data |= IsConsumed; | ||||||||
3501 | else | ||||||||
3502 | copy.Data &= ~IsConsumed; | ||||||||
3503 | return copy; | ||||||||
3504 | } | ||||||||
3505 | |||||||||
3506 | bool hasPassObjectSize() const { return Data & HasPassObjSize; } | ||||||||
3507 | ExtParameterInfo withHasPassObjectSize() const { | ||||||||
3508 | ExtParameterInfo Copy = *this; | ||||||||
3509 | Copy.Data |= HasPassObjSize; | ||||||||
3510 | return Copy; | ||||||||
3511 | } | ||||||||
3512 | |||||||||
3513 | bool isNoEscape() const { return Data & IsNoEscape; } | ||||||||
3514 | ExtParameterInfo withIsNoEscape(bool NoEscape) const { | ||||||||
3515 | ExtParameterInfo Copy = *this; | ||||||||
3516 | if (NoEscape) | ||||||||
3517 | Copy.Data |= IsNoEscape; | ||||||||
3518 | else | ||||||||
3519 | Copy.Data &= ~IsNoEscape; | ||||||||
3520 | return Copy; | ||||||||
3521 | } | ||||||||
3522 | |||||||||
3523 | unsigned char getOpaqueValue() const { return Data; } | ||||||||
3524 | static ExtParameterInfo getFromOpaqueValue(unsigned char data) { | ||||||||
3525 | ExtParameterInfo result; | ||||||||
3526 | result.Data = data; | ||||||||
3527 | return result; | ||||||||
3528 | } | ||||||||
3529 | |||||||||
3530 | friend bool operator==(ExtParameterInfo lhs, ExtParameterInfo rhs) { | ||||||||
3531 | return lhs.Data == rhs.Data; | ||||||||
3532 | } | ||||||||
3533 | |||||||||
3534 | friend bool operator!=(ExtParameterInfo lhs, ExtParameterInfo rhs) { | ||||||||
3535 | return lhs.Data != rhs.Data; | ||||||||
3536 | } | ||||||||
3537 | }; | ||||||||
3538 | |||||||||
3539 | /// A class which abstracts out some details necessary for | ||||||||
3540 | /// making a call. | ||||||||
3541 | /// | ||||||||
3542 | /// It is not actually used directly for storing this information in | ||||||||
3543 | /// a FunctionType, although FunctionType does currently use the | ||||||||
3544 | /// same bit-pattern. | ||||||||
3545 | /// | ||||||||
3546 | // If you add a field (say Foo), other than the obvious places (both, | ||||||||
3547 | // constructors, compile failures), what you need to update is | ||||||||
3548 | // * Operator== | ||||||||
3549 | // * getFoo | ||||||||
3550 | // * withFoo | ||||||||
3551 | // * functionType. Add Foo, getFoo. | ||||||||
3552 | // * ASTContext::getFooType | ||||||||
3553 | // * ASTContext::mergeFunctionTypes | ||||||||
3554 | // * FunctionNoProtoType::Profile | ||||||||
3555 | // * FunctionProtoType::Profile | ||||||||
3556 | // * TypePrinter::PrintFunctionProto | ||||||||
3557 | // * AST read and write | ||||||||
3558 | // * Codegen | ||||||||
3559 | class ExtInfo { | ||||||||
3560 | friend class FunctionType; | ||||||||
3561 | |||||||||
3562 | // Feel free to rearrange or add bits, but if you go over 12, | ||||||||
3563 | // you'll need to adjust both the Bits field below and | ||||||||
3564 | // Type::FunctionTypeBitfields. | ||||||||
3565 | |||||||||
3566 | // | CC |noreturn|produces|nocallersavedregs|regparm|nocfcheck| | ||||||||
3567 | // |0 .. 4| 5 | 6 | 7 |8 .. 10| 11 | | ||||||||
3568 | // | ||||||||
3569 | // regparm is either 0 (no regparm attribute) or the regparm value+1. | ||||||||
3570 | enum { CallConvMask = 0x1F }; | ||||||||
3571 | enum { NoReturnMask = 0x20 }; | ||||||||
3572 | enum { ProducesResultMask = 0x40 }; | ||||||||
3573 | enum { NoCallerSavedRegsMask = 0x80 }; | ||||||||
3574 | enum { NoCfCheckMask = 0x800 }; | ||||||||
3575 | enum { | ||||||||
3576 | RegParmMask = ~(CallConvMask | NoReturnMask | ProducesResultMask | | ||||||||
3577 | NoCallerSavedRegsMask | NoCfCheckMask), | ||||||||
3578 | RegParmOffset = 8 | ||||||||
3579 | }; // Assumed to be the last field | ||||||||
3580 | uint16_t Bits = CC_C; | ||||||||
3581 | |||||||||
3582 | ExtInfo(unsigned Bits) : Bits(static_cast<uint16_t>(Bits)) {} | ||||||||
3583 | |||||||||
3584 | public: | ||||||||
3585 | // Constructor with no defaults. Use this when you know that you | ||||||||
3586 | // have all the elements (when reading an AST file for example). | ||||||||
3587 | ExtInfo(bool noReturn, bool hasRegParm, unsigned regParm, CallingConv cc, | ||||||||
3588 | bool producesResult, bool noCallerSavedRegs, bool NoCfCheck) { | ||||||||
3589 | assert((!hasRegParm || regParm < 7) && "Invalid regparm value")(((!hasRegParm || regParm < 7) && "Invalid regparm value" ) ? static_cast<void> (0) : __assert_fail ("(!hasRegParm || regParm < 7) && \"Invalid regparm value\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 3589, __PRETTY_FUNCTION__)); | ||||||||
3590 | Bits = ((unsigned)cc) | (noReturn ? NoReturnMask : 0) | | ||||||||
3591 | (producesResult ? ProducesResultMask : 0) | | ||||||||
3592 | (noCallerSavedRegs ? NoCallerSavedRegsMask : 0) | | ||||||||
3593 | (hasRegParm ? ((regParm + 1) << RegParmOffset) : 0) | | ||||||||
3594 | (NoCfCheck ? NoCfCheckMask : 0); | ||||||||
3595 | } | ||||||||
3596 | |||||||||
3597 | // Constructor with all defaults. Use when for example creating a | ||||||||
3598 | // function known to use defaults. | ||||||||
3599 | ExtInfo() = default; | ||||||||
3600 | |||||||||
3601 | // Constructor with just the calling convention, which is an important part | ||||||||
3602 | // of the canonical type. | ||||||||
3603 | ExtInfo(CallingConv CC) : Bits(CC) {} | ||||||||
3604 | |||||||||
3605 | bool getNoReturn() const { return Bits & NoReturnMask; } | ||||||||
3606 | bool getProducesResult() const { return Bits & ProducesResultMask; } | ||||||||
3607 | bool getNoCallerSavedRegs() const { return Bits & NoCallerSavedRegsMask; } | ||||||||
3608 | bool getNoCfCheck() const { return Bits & NoCfCheckMask; } | ||||||||
3609 | bool getHasRegParm() const { return (Bits >> RegParmOffset) != 0; } | ||||||||
3610 | |||||||||
3611 | unsigned getRegParm() const { | ||||||||
3612 | unsigned RegParm = (Bits & RegParmMask) >> RegParmOffset; | ||||||||
3613 | if (RegParm > 0) | ||||||||
3614 | --RegParm; | ||||||||
3615 | return RegParm; | ||||||||
3616 | } | ||||||||
3617 | |||||||||
3618 | CallingConv getCC() const { return CallingConv(Bits & CallConvMask); } | ||||||||
3619 | |||||||||
3620 | bool operator==(ExtInfo Other) const { | ||||||||
3621 | return Bits == Other.Bits; | ||||||||
3622 | } | ||||||||
3623 | bool operator!=(ExtInfo Other) const { | ||||||||
3624 | return Bits != Other.Bits; | ||||||||
3625 | } | ||||||||
3626 | |||||||||
3627 | // Note that we don't have setters. That is by design, use | ||||||||
3628 | // the following with methods instead of mutating these objects. | ||||||||
3629 | |||||||||
3630 | ExtInfo withNoReturn(bool noReturn) const { | ||||||||
3631 | if (noReturn) | ||||||||
3632 | return ExtInfo(Bits | NoReturnMask); | ||||||||
3633 | else | ||||||||
3634 | return ExtInfo(Bits & ~NoReturnMask); | ||||||||
3635 | } | ||||||||
3636 | |||||||||
3637 | ExtInfo withProducesResult(bool producesResult) const { | ||||||||
3638 | if (producesResult) | ||||||||
3639 | return ExtInfo(Bits | ProducesResultMask); | ||||||||
3640 | else | ||||||||
3641 | return ExtInfo(Bits & ~ProducesResultMask); | ||||||||
3642 | } | ||||||||
3643 | |||||||||
3644 | ExtInfo withNoCallerSavedRegs(bool noCallerSavedRegs) const { | ||||||||
3645 | if (noCallerSavedRegs) | ||||||||
3646 | return ExtInfo(Bits | NoCallerSavedRegsMask); | ||||||||
3647 | else | ||||||||
3648 | return ExtInfo(Bits & ~NoCallerSavedRegsMask); | ||||||||
3649 | } | ||||||||
3650 | |||||||||
3651 | ExtInfo withNoCfCheck(bool noCfCheck) const { | ||||||||
3652 | if (noCfCheck) | ||||||||
3653 | return ExtInfo(Bits | NoCfCheckMask); | ||||||||
3654 | else | ||||||||
3655 | return ExtInfo(Bits & ~NoCfCheckMask); | ||||||||
3656 | } | ||||||||
3657 | |||||||||
3658 | ExtInfo withRegParm(unsigned RegParm) const { | ||||||||
3659 | assert(RegParm < 7 && "Invalid regparm value")((RegParm < 7 && "Invalid regparm value") ? static_cast <void> (0) : __assert_fail ("RegParm < 7 && \"Invalid regparm value\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 3659, __PRETTY_FUNCTION__)); | ||||||||
3660 | return ExtInfo((Bits & ~RegParmMask) | | ||||||||
3661 | ((RegParm + 1) << RegParmOffset)); | ||||||||
3662 | } | ||||||||
3663 | |||||||||
3664 | ExtInfo withCallingConv(CallingConv cc) const { | ||||||||
3665 | return ExtInfo((Bits & ~CallConvMask) | (unsigned) cc); | ||||||||
3666 | } | ||||||||
3667 | |||||||||
3668 | void Profile(llvm::FoldingSetNodeID &ID) const { | ||||||||
3669 | ID.AddInteger(Bits); | ||||||||
3670 | } | ||||||||
3671 | }; | ||||||||
3672 | |||||||||
3673 | /// A simple holder for a QualType representing a type in an | ||||||||
3674 | /// exception specification. Unfortunately needed by FunctionProtoType | ||||||||
3675 | /// because TrailingObjects cannot handle repeated types. | ||||||||
3676 | struct ExceptionType { QualType Type; }; | ||||||||
3677 | |||||||||
3678 | /// A simple holder for various uncommon bits which do not fit in | ||||||||
3679 | /// FunctionTypeBitfields. Aligned to alignof(void *) to maintain the | ||||||||
3680 | /// alignment of subsequent objects in TrailingObjects. You must update | ||||||||
3681 | /// hasExtraBitfields in FunctionProtoType after adding extra data here. | ||||||||
3682 | struct alignas(void *) FunctionTypeExtraBitfields { | ||||||||
3683 | /// The number of types in the exception specification. | ||||||||
3684 | /// A whole unsigned is not needed here and according to | ||||||||
3685 | /// [implimits] 8 bits would be enough here. | ||||||||
3686 | unsigned NumExceptionType; | ||||||||
3687 | }; | ||||||||
3688 | |||||||||
3689 | protected: | ||||||||
3690 | FunctionType(TypeClass tc, QualType res, | ||||||||
3691 | QualType Canonical, bool Dependent, | ||||||||
3692 | bool InstantiationDependent, | ||||||||
3693 | bool VariablyModified, bool ContainsUnexpandedParameterPack, | ||||||||
3694 | ExtInfo Info) | ||||||||
3695 | : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified, | ||||||||
3696 | ContainsUnexpandedParameterPack), | ||||||||
3697 | ResultType(res) { | ||||||||
3698 | FunctionTypeBits.ExtInfo = Info.Bits; | ||||||||
3699 | } | ||||||||
3700 | |||||||||
3701 | Qualifiers getFastTypeQuals() const { | ||||||||
3702 | return Qualifiers::fromFastMask(FunctionTypeBits.FastTypeQuals); | ||||||||
3703 | } | ||||||||
3704 | |||||||||
3705 | public: | ||||||||
3706 | QualType getReturnType() const { return ResultType; } | ||||||||
3707 | |||||||||
3708 | bool getHasRegParm() const { return getExtInfo().getHasRegParm(); } | ||||||||
3709 | unsigned getRegParmType() const { return getExtInfo().getRegParm(); } | ||||||||
3710 | |||||||||
3711 | /// Determine whether this function type includes the GNU noreturn | ||||||||
3712 | /// attribute. The C++11 [[noreturn]] attribute does not affect the function | ||||||||
3713 | /// type. | ||||||||
3714 | bool getNoReturnAttr() const { return getExtInfo().getNoReturn(); } | ||||||||
3715 | |||||||||
3716 | CallingConv getCallConv() const { return getExtInfo().getCC(); } | ||||||||
3717 | ExtInfo getExtInfo() const { return ExtInfo(FunctionTypeBits.ExtInfo); } | ||||||||
3718 | |||||||||
3719 | static_assert((~Qualifiers::FastMask & Qualifiers::CVRMask) == 0, | ||||||||
3720 | "Const, volatile and restrict are assumed to be a subset of " | ||||||||
3721 | "the fast qualifiers."); | ||||||||
3722 | |||||||||
3723 | bool isConst() const { return getFastTypeQuals().hasConst(); } | ||||||||
3724 | bool isVolatile() const { return getFastTypeQuals().hasVolatile(); } | ||||||||
3725 | bool isRestrict() const { return getFastTypeQuals().hasRestrict(); } | ||||||||
3726 | |||||||||
3727 | /// Determine the type of an expression that calls a function of | ||||||||
3728 | /// this type. | ||||||||
3729 | QualType getCallResultType(const ASTContext &Context) const { | ||||||||
3730 | return getReturnType().getNonLValueExprType(Context); | ||||||||
3731 | } | ||||||||
3732 | |||||||||
3733 | static StringRef getNameForCallConv(CallingConv CC); | ||||||||
3734 | |||||||||
3735 | static bool classof(const Type *T) { | ||||||||
3736 | return T->getTypeClass() == FunctionNoProto || | ||||||||
3737 | T->getTypeClass() == FunctionProto; | ||||||||
3738 | } | ||||||||
3739 | }; | ||||||||
3740 | |||||||||
3741 | /// Represents a K&R-style 'int foo()' function, which has | ||||||||
3742 | /// no information available about its arguments. | ||||||||
3743 | class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { | ||||||||
3744 | friend class ASTContext; // ASTContext creates these. | ||||||||
3745 | |||||||||
3746 | FunctionNoProtoType(QualType Result, QualType Canonical, ExtInfo Info) | ||||||||
3747 | : FunctionType(FunctionNoProto, Result, Canonical, | ||||||||
3748 | /*Dependent=*/false, /*InstantiationDependent=*/false, | ||||||||
3749 | Result->isVariablyModifiedType(), | ||||||||
3750 | /*ContainsUnexpandedParameterPack=*/false, Info) {} | ||||||||
3751 | |||||||||
3752 | public: | ||||||||
3753 | // No additional state past what FunctionType provides. | ||||||||
3754 | |||||||||
3755 | bool isSugared() const { return false; } | ||||||||
3756 | QualType desugar() const { return QualType(this, 0); } | ||||||||
3757 | |||||||||
3758 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||||
3759 | Profile(ID, getReturnType(), getExtInfo()); | ||||||||
3760 | } | ||||||||
3761 | |||||||||
3762 | static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, | ||||||||
3763 | ExtInfo Info) { | ||||||||
3764 | Info.Profile(ID); | ||||||||
3765 | ID.AddPointer(ResultType.getAsOpaquePtr()); | ||||||||
3766 | } | ||||||||
3767 | |||||||||
3768 | static bool classof(const Type *T) { | ||||||||
3769 | return T->getTypeClass() == FunctionNoProto; | ||||||||
3770 | } | ||||||||
3771 | }; | ||||||||
3772 | |||||||||
3773 | /// Represents a prototype with parameter type info, e.g. | ||||||||
3774 | /// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no | ||||||||
3775 | /// parameters, not as having a single void parameter. Such a type can have | ||||||||
3776 | /// an exception specification, but this specification is not part of the | ||||||||
3777 | /// canonical type. FunctionProtoType has several trailing objects, some of | ||||||||
3778 | /// which optional. For more information about the trailing objects see | ||||||||
3779 | /// the first comment inside FunctionProtoType. | ||||||||
3780 | class FunctionProtoType final | ||||||||
3781 | : public FunctionType, | ||||||||
3782 | public llvm::FoldingSetNode, | ||||||||
3783 | private llvm::TrailingObjects< | ||||||||
3784 | FunctionProtoType, QualType, SourceLocation, | ||||||||
3785 | FunctionType::FunctionTypeExtraBitfields, FunctionType::ExceptionType, | ||||||||
3786 | Expr *, FunctionDecl *, FunctionType::ExtParameterInfo, Qualifiers> { | ||||||||
3787 | friend class ASTContext; // ASTContext creates these. | ||||||||
3788 | friend TrailingObjects; | ||||||||
3789 | |||||||||
3790 | // FunctionProtoType is followed by several trailing objects, some of | ||||||||
3791 | // which optional. They are in order: | ||||||||
3792 | // | ||||||||
3793 | // * An array of getNumParams() QualType holding the parameter types. | ||||||||
3794 | // Always present. Note that for the vast majority of FunctionProtoType, | ||||||||
3795 | // these will be the only trailing objects. | ||||||||
3796 | // | ||||||||
3797 | // * Optionally if the function is variadic, the SourceLocation of the | ||||||||
3798 | // ellipsis. | ||||||||
3799 | // | ||||||||
3800 | // * Optionally if some extra data is stored in FunctionTypeExtraBitfields | ||||||||
3801 | // (see FunctionTypeExtraBitfields and FunctionTypeBitfields): | ||||||||
3802 | // a single FunctionTypeExtraBitfields. Present if and only if | ||||||||
3803 | // hasExtraBitfields() is true. | ||||||||
3804 | // | ||||||||
3805 | // * Optionally exactly one of: | ||||||||
3806 | // * an array of getNumExceptions() ExceptionType, | ||||||||
3807 | // * a single Expr *, | ||||||||
3808 | // * a pair of FunctionDecl *, | ||||||||
3809 | // * a single FunctionDecl * | ||||||||
3810 | // used to store information about the various types of exception | ||||||||
3811 | // specification. See getExceptionSpecSize for the details. | ||||||||
3812 | // | ||||||||
3813 | // * Optionally an array of getNumParams() ExtParameterInfo holding | ||||||||
3814 | // an ExtParameterInfo for each of the parameters. Present if and | ||||||||
3815 | // only if hasExtParameterInfos() is true. | ||||||||
3816 | // | ||||||||
3817 | // * Optionally a Qualifiers object to represent extra qualifiers that can't | ||||||||
3818 | // be represented by FunctionTypeBitfields.FastTypeQuals. Present if and only | ||||||||
3819 | // if hasExtQualifiers() is true. | ||||||||
3820 | // | ||||||||
3821 | // The optional FunctionTypeExtraBitfields has to be before the data | ||||||||
3822 | // related to the exception specification since it contains the number | ||||||||
3823 | // of exception types. | ||||||||
3824 | // | ||||||||
3825 | // We put the ExtParameterInfos last. If all were equal, it would make | ||||||||
3826 | // more sense to put these before the exception specification, because | ||||||||
3827 | // it's much easier to skip past them compared to the elaborate switch | ||||||||
3828 | // required to skip the exception specification. However, all is not | ||||||||
3829 | // equal; ExtParameterInfos are used to model very uncommon features, | ||||||||
3830 | // and it's better not to burden the more common paths. | ||||||||
3831 | |||||||||
3832 | public: | ||||||||
3833 | /// Holds information about the various types of exception specification. | ||||||||
3834 | /// ExceptionSpecInfo is not stored as such in FunctionProtoType but is | ||||||||
3835 | /// used to group together the various bits of information about the | ||||||||
3836 | /// exception specification. | ||||||||
3837 | struct ExceptionSpecInfo { | ||||||||
3838 | /// The kind of exception specification this is. | ||||||||
3839 | ExceptionSpecificationType Type = EST_None; | ||||||||
3840 | |||||||||
3841 | /// Explicitly-specified list of exception types. | ||||||||
3842 | ArrayRef<QualType> Exceptions; | ||||||||
3843 | |||||||||
3844 | /// Noexcept expression, if this is a computed noexcept specification. | ||||||||
3845 | Expr *NoexceptExpr = nullptr; | ||||||||
3846 | |||||||||
3847 | /// The function whose exception specification this is, for | ||||||||
3848 | /// EST_Unevaluated and EST_Uninstantiated. | ||||||||
3849 | FunctionDecl *SourceDecl = nullptr; | ||||||||
3850 | |||||||||
3851 | /// The function template whose exception specification this is instantiated | ||||||||
3852 | /// from, for EST_Uninstantiated. | ||||||||
3853 | FunctionDecl *SourceTemplate = nullptr; | ||||||||
3854 | |||||||||
3855 | ExceptionSpecInfo() = default; | ||||||||
3856 | |||||||||
3857 | ExceptionSpecInfo(ExceptionSpecificationType EST) : Type(EST) {} | ||||||||
3858 | }; | ||||||||
3859 | |||||||||
3860 | /// Extra information about a function prototype. ExtProtoInfo is not | ||||||||
3861 | /// stored as such in FunctionProtoType but is used to group together | ||||||||
3862 | /// the various bits of extra information about a function prototype. | ||||||||
3863 | struct ExtProtoInfo { | ||||||||
3864 | FunctionType::ExtInfo ExtInfo; | ||||||||
3865 | bool Variadic : 1; | ||||||||
3866 | bool HasTrailingReturn : 1; | ||||||||
3867 | Qualifiers TypeQuals; | ||||||||
3868 | RefQualifierKind RefQualifier = RQ_None; | ||||||||
3869 | ExceptionSpecInfo ExceptionSpec; | ||||||||
3870 | const ExtParameterInfo *ExtParameterInfos = nullptr; | ||||||||
3871 | SourceLocation EllipsisLoc; | ||||||||
3872 | |||||||||
3873 | ExtProtoInfo() : Variadic(false), HasTrailingReturn(false) {} | ||||||||
3874 | |||||||||
3875 | ExtProtoInfo(CallingConv CC) | ||||||||
3876 | : ExtInfo(CC), Variadic(false), HasTrailingReturn(false) {} | ||||||||
3877 | |||||||||
3878 | ExtProtoInfo withExceptionSpec(const ExceptionSpecInfo &ESI) { | ||||||||
3879 | ExtProtoInfo Result(*this); | ||||||||
3880 | Result.ExceptionSpec = ESI; | ||||||||
3881 | return Result; | ||||||||
3882 | } | ||||||||
3883 | }; | ||||||||
3884 | |||||||||
3885 | private: | ||||||||
3886 | unsigned numTrailingObjects(OverloadToken<QualType>) const { | ||||||||
3887 | return getNumParams(); | ||||||||
3888 | } | ||||||||
3889 | |||||||||
3890 | unsigned numTrailingObjects(OverloadToken<SourceLocation>) const { | ||||||||
3891 | return isVariadic(); | ||||||||
3892 | } | ||||||||
3893 | |||||||||
3894 | unsigned numTrailingObjects(OverloadToken<FunctionTypeExtraBitfields>) const { | ||||||||
3895 | return hasExtraBitfields(); | ||||||||
3896 | } | ||||||||
3897 | |||||||||
3898 | unsigned numTrailingObjects(OverloadToken<ExceptionType>) const { | ||||||||
3899 | return getExceptionSpecSize().NumExceptionType; | ||||||||
3900 | } | ||||||||
3901 | |||||||||
3902 | unsigned numTrailingObjects(OverloadToken<Expr *>) const { | ||||||||
3903 | return getExceptionSpecSize().NumExprPtr; | ||||||||
3904 | } | ||||||||
3905 | |||||||||
3906 | unsigned numTrailingObjects(OverloadToken<FunctionDecl *>) const { | ||||||||
3907 | return getExceptionSpecSize().NumFunctionDeclPtr; | ||||||||
3908 | } | ||||||||
3909 | |||||||||
3910 | unsigned numTrailingObjects(OverloadToken<ExtParameterInfo>) const { | ||||||||
3911 | return hasExtParameterInfos() ? getNumParams() : 0; | ||||||||
3912 | } | ||||||||
3913 | |||||||||
3914 | /// Determine whether there are any argument types that | ||||||||
3915 | /// contain an unexpanded parameter pack. | ||||||||
3916 | static bool containsAnyUnexpandedParameterPack(const QualType *ArgArray, | ||||||||
3917 | unsigned numArgs) { | ||||||||
3918 | for (unsigned Idx = 0; Idx < numArgs; ++Idx) | ||||||||
3919 | if (ArgArray[Idx]->containsUnexpandedParameterPack()) | ||||||||
3920 | return true; | ||||||||
3921 | |||||||||
3922 | return false; | ||||||||
3923 | } | ||||||||
3924 | |||||||||
3925 | FunctionProtoType(QualType result, ArrayRef<QualType> params, | ||||||||
3926 | QualType canonical, const ExtProtoInfo &epi); | ||||||||
3927 | |||||||||
3928 | /// This struct is returned by getExceptionSpecSize and is used to | ||||||||
3929 | /// translate an ExceptionSpecificationType to the number and kind | ||||||||
3930 | /// of trailing objects related to the exception specification. | ||||||||
3931 | struct ExceptionSpecSizeHolder { | ||||||||
3932 | unsigned NumExceptionType; | ||||||||
3933 | unsigned NumExprPtr; | ||||||||
3934 | unsigned NumFunctionDeclPtr; | ||||||||
3935 | }; | ||||||||
3936 | |||||||||
3937 | /// Return the number and kind of trailing objects | ||||||||
3938 | /// related to the exception specification. | ||||||||
3939 | static ExceptionSpecSizeHolder | ||||||||
3940 | getExceptionSpecSize(ExceptionSpecificationType EST, unsigned NumExceptions) { | ||||||||
3941 | switch (EST) { | ||||||||
3942 | case EST_None: | ||||||||
3943 | case EST_DynamicNone: | ||||||||
3944 | case EST_MSAny: | ||||||||
3945 | case EST_BasicNoexcept: | ||||||||
3946 | case EST_Unparsed: | ||||||||
3947 | case EST_NoThrow: | ||||||||
3948 | return {0, 0, 0}; | ||||||||
3949 | |||||||||
3950 | case EST_Dynamic: | ||||||||
3951 | return {NumExceptions, 0, 0}; | ||||||||
3952 | |||||||||
3953 | case EST_DependentNoexcept: | ||||||||
3954 | case EST_NoexceptFalse: | ||||||||
3955 | case EST_NoexceptTrue: | ||||||||
3956 | return {0, 1, 0}; | ||||||||
3957 | |||||||||
3958 | case EST_Uninstantiated: | ||||||||
3959 | return {0, 0, 2}; | ||||||||
3960 | |||||||||
3961 | case EST_Unevaluated: | ||||||||
3962 | return {0, 0, 1}; | ||||||||
3963 | } | ||||||||
3964 | llvm_unreachable("bad exception specification kind")::llvm::llvm_unreachable_internal("bad exception specification kind" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 3964); | ||||||||
3965 | } | ||||||||
3966 | |||||||||
3967 | /// Return the number and kind of trailing objects | ||||||||
3968 | /// related to the exception specification. | ||||||||
3969 | ExceptionSpecSizeHolder getExceptionSpecSize() const { | ||||||||
3970 | return getExceptionSpecSize(getExceptionSpecType(), getNumExceptions()); | ||||||||
3971 | } | ||||||||
3972 | |||||||||
3973 | /// Whether the trailing FunctionTypeExtraBitfields is present. | ||||||||
3974 | static bool hasExtraBitfields(ExceptionSpecificationType EST) { | ||||||||
3975 | // If the exception spec type is EST_Dynamic then we have > 0 exception | ||||||||
3976 | // types and the exact number is stored in FunctionTypeExtraBitfields. | ||||||||
3977 | return EST == EST_Dynamic; | ||||||||
3978 | } | ||||||||
3979 | |||||||||
3980 | /// Whether the trailing FunctionTypeExtraBitfields is present. | ||||||||
3981 | bool hasExtraBitfields() const { | ||||||||
3982 | return hasExtraBitfields(getExceptionSpecType()); | ||||||||
3983 | } | ||||||||
3984 | |||||||||
3985 | bool hasExtQualifiers() const { | ||||||||
3986 | return FunctionTypeBits.HasExtQuals; | ||||||||
3987 | } | ||||||||
3988 | |||||||||
3989 | public: | ||||||||
3990 | unsigned getNumParams() const { return FunctionTypeBits.NumParams; } | ||||||||
3991 | |||||||||
3992 | QualType getParamType(unsigned i) const { | ||||||||
3993 | assert(i < getNumParams() && "invalid parameter index")((i < getNumParams() && "invalid parameter index") ? static_cast<void> (0) : __assert_fail ("i < getNumParams() && \"invalid parameter index\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 3993, __PRETTY_FUNCTION__)); | ||||||||
3994 | return param_type_begin()[i]; | ||||||||
3995 | } | ||||||||
3996 | |||||||||
3997 | ArrayRef<QualType> getParamTypes() const { | ||||||||
3998 | return llvm::makeArrayRef(param_type_begin(), param_type_end()); | ||||||||
3999 | } | ||||||||
4000 | |||||||||
4001 | ExtProtoInfo getExtProtoInfo() const { | ||||||||
4002 | ExtProtoInfo EPI; | ||||||||
4003 | EPI.ExtInfo = getExtInfo(); | ||||||||
4004 | EPI.Variadic = isVariadic(); | ||||||||
4005 | EPI.EllipsisLoc = getEllipsisLoc(); | ||||||||
4006 | EPI.HasTrailingReturn = hasTrailingReturn(); | ||||||||
4007 | EPI.ExceptionSpec = getExceptionSpecInfo(); | ||||||||
4008 | EPI.TypeQuals = getMethodQuals(); | ||||||||
4009 | EPI.RefQualifier = getRefQualifier(); | ||||||||
4010 | EPI.ExtParameterInfos = getExtParameterInfosOrNull(); | ||||||||
4011 | return EPI; | ||||||||
4012 | } | ||||||||
4013 | |||||||||
4014 | /// Get the kind of exception specification on this function. | ||||||||
4015 | ExceptionSpecificationType getExceptionSpecType() const { | ||||||||
4016 | return static_cast<ExceptionSpecificationType>( | ||||||||
4017 | FunctionTypeBits.ExceptionSpecType); | ||||||||
4018 | } | ||||||||
4019 | |||||||||
4020 | /// Return whether this function has any kind of exception spec. | ||||||||
4021 | bool hasExceptionSpec() const { return getExceptionSpecType() != EST_None; } | ||||||||
4022 | |||||||||
4023 | /// Return whether this function has a dynamic (throw) exception spec. | ||||||||
4024 | bool hasDynamicExceptionSpec() const { | ||||||||
4025 | return isDynamicExceptionSpec(getExceptionSpecType()); | ||||||||
4026 | } | ||||||||
4027 | |||||||||
4028 | /// Return whether this function has a noexcept exception spec. | ||||||||
4029 | bool hasNoexceptExceptionSpec() const { | ||||||||
4030 | return isNoexceptExceptionSpec(getExceptionSpecType()); | ||||||||
4031 | } | ||||||||
4032 | |||||||||
4033 | /// Return whether this function has a dependent exception spec. | ||||||||
4034 | bool hasDependentExceptionSpec() const; | ||||||||
4035 | |||||||||
4036 | /// Return whether this function has an instantiation-dependent exception | ||||||||
4037 | /// spec. | ||||||||
4038 | bool hasInstantiationDependentExceptionSpec() const; | ||||||||
4039 | |||||||||
4040 | /// Return all the available information about this type's exception spec. | ||||||||
4041 | ExceptionSpecInfo getExceptionSpecInfo() const { | ||||||||
4042 | ExceptionSpecInfo Result; | ||||||||
4043 | Result.Type = getExceptionSpecType(); | ||||||||
4044 | if (Result.Type == EST_Dynamic) { | ||||||||
4045 | Result.Exceptions = exceptions(); | ||||||||
4046 | } else if (isComputedNoexcept(Result.Type)) { | ||||||||
4047 | Result.NoexceptExpr = getNoexceptExpr(); | ||||||||
4048 | } else if (Result.Type == EST_Uninstantiated) { | ||||||||
4049 | Result.SourceDecl = getExceptionSpecDecl(); | ||||||||
4050 | Result.SourceTemplate = getExceptionSpecTemplate(); | ||||||||
4051 | } else if (Result.Type == EST_Unevaluated) { | ||||||||
4052 | Result.SourceDecl = getExceptionSpecDecl(); | ||||||||
4053 | } | ||||||||
4054 | return Result; | ||||||||
4055 | } | ||||||||
4056 | |||||||||
4057 | /// Return the number of types in the exception specification. | ||||||||
4058 | unsigned getNumExceptions() const { | ||||||||
4059 | return getExceptionSpecType() == EST_Dynamic | ||||||||
4060 | ? getTrailingObjects<FunctionTypeExtraBitfields>() | ||||||||
4061 | ->NumExceptionType | ||||||||
4062 | : 0; | ||||||||
4063 | } | ||||||||
4064 | |||||||||
4065 | /// Return the ith exception type, where 0 <= i < getNumExceptions(). | ||||||||
4066 | QualType getExceptionType(unsigned i) const { | ||||||||
4067 | assert(i < getNumExceptions() && "Invalid exception number!")((i < getNumExceptions() && "Invalid exception number!" ) ? static_cast<void> (0) : __assert_fail ("i < getNumExceptions() && \"Invalid exception number!\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 4067, __PRETTY_FUNCTION__)); | ||||||||
4068 | return exception_begin()[i]; | ||||||||
4069 | } | ||||||||
4070 | |||||||||
4071 | /// Return the expression inside noexcept(expression), or a null pointer | ||||||||
4072 | /// if there is none (because the exception spec is not of this form). | ||||||||
4073 | Expr *getNoexceptExpr() const { | ||||||||
4074 | if (!isComputedNoexcept(getExceptionSpecType())) | ||||||||
4075 | return nullptr; | ||||||||
4076 | return *getTrailingObjects<Expr *>(); | ||||||||
4077 | } | ||||||||
4078 | |||||||||
4079 | /// If this function type has an exception specification which hasn't | ||||||||
4080 | /// been determined yet (either because it has not been evaluated or because | ||||||||
4081 | /// it has not been instantiated), this is the function whose exception | ||||||||
4082 | /// specification is represented by this type. | ||||||||
4083 | FunctionDecl *getExceptionSpecDecl() const { | ||||||||
4084 | if (getExceptionSpecType() != EST_Uninstantiated && | ||||||||
4085 | getExceptionSpecType() != EST_Unevaluated) | ||||||||
4086 | return nullptr; | ||||||||
4087 | return getTrailingObjects<FunctionDecl *>()[0]; | ||||||||
4088 | } | ||||||||
4089 | |||||||||
4090 | /// If this function type has an uninstantiated exception | ||||||||
4091 | /// specification, this is the function whose exception specification | ||||||||
4092 | /// should be instantiated to find the exception specification for | ||||||||
4093 | /// this type. | ||||||||
4094 | FunctionDecl *getExceptionSpecTemplate() const { | ||||||||
4095 | if (getExceptionSpecType() != EST_Uninstantiated) | ||||||||
4096 | return nullptr; | ||||||||
4097 | return getTrailingObjects<FunctionDecl *>()[1]; | ||||||||
4098 | } | ||||||||
4099 | |||||||||
4100 | /// Determine whether this function type has a non-throwing exception | ||||||||
4101 | /// specification. | ||||||||
4102 | CanThrowResult canThrow() const; | ||||||||
4103 | |||||||||
4104 | /// Determine whether this function type has a non-throwing exception | ||||||||
4105 | /// specification. If this depends on template arguments, returns | ||||||||
4106 | /// \c ResultIfDependent. | ||||||||
4107 | bool isNothrow(bool ResultIfDependent = false) const { | ||||||||
4108 | return ResultIfDependent ? canThrow() != CT_Can : canThrow() == CT_Cannot; | ||||||||
4109 | } | ||||||||
4110 | |||||||||
4111 | /// Whether this function prototype is variadic. | ||||||||
4112 | bool isVariadic() const { return FunctionTypeBits.Variadic; } | ||||||||
4113 | |||||||||
4114 | SourceLocation getEllipsisLoc() const { | ||||||||
4115 | return isVariadic() ? *getTrailingObjects<SourceLocation>() | ||||||||
4116 | : SourceLocation(); | ||||||||
4117 | } | ||||||||
4118 | |||||||||
4119 | /// Determines whether this function prototype contains a | ||||||||
4120 | /// parameter pack at the end. | ||||||||
4121 | /// | ||||||||
4122 | /// A function template whose last parameter is a parameter pack can be | ||||||||
4123 | /// called with an arbitrary number of arguments, much like a variadic | ||||||||
4124 | /// function. | ||||||||
4125 | bool isTemplateVariadic() const; | ||||||||
4126 | |||||||||
4127 | /// Whether this function prototype has a trailing return type. | ||||||||
4128 | bool hasTrailingReturn() const { return FunctionTypeBits.HasTrailingReturn; } | ||||||||
4129 | |||||||||
4130 | Qualifiers getMethodQuals() const { | ||||||||
4131 | if (hasExtQualifiers()) | ||||||||
4132 | return *getTrailingObjects<Qualifiers>(); | ||||||||
4133 | else | ||||||||
4134 | return getFastTypeQuals(); | ||||||||
4135 | } | ||||||||
4136 | |||||||||
4137 | /// Retrieve the ref-qualifier associated with this function type. | ||||||||
4138 | RefQualifierKind getRefQualifier() const { | ||||||||
4139 | return static_cast<RefQualifierKind>(FunctionTypeBits.RefQualifier); | ||||||||
4140 | } | ||||||||
4141 | |||||||||
4142 | using param_type_iterator = const QualType *; | ||||||||
4143 | using param_type_range = llvm::iterator_range<param_type_iterator>; | ||||||||
4144 | |||||||||
4145 | param_type_range param_types() const { | ||||||||
4146 | return param_type_range(param_type_begin(), param_type_end()); | ||||||||
4147 | } | ||||||||
4148 | |||||||||
4149 | param_type_iterator param_type_begin() const { | ||||||||
4150 | return getTrailingObjects<QualType>(); | ||||||||
4151 | } | ||||||||
4152 | |||||||||
4153 | param_type_iterator param_type_end() const { | ||||||||
4154 | return param_type_begin() + getNumParams(); | ||||||||
4155 | } | ||||||||
4156 | |||||||||
4157 | using exception_iterator = const QualType *; | ||||||||
4158 | |||||||||
4159 | ArrayRef<QualType> exceptions() const { | ||||||||
4160 | return llvm::makeArrayRef(exception_begin(), exception_end()); | ||||||||
4161 | } | ||||||||
4162 | |||||||||
4163 | exception_iterator exception_begin() const { | ||||||||
4164 | return reinterpret_cast<exception_iterator>( | ||||||||
4165 | getTrailingObjects<ExceptionType>()); | ||||||||
4166 | } | ||||||||
4167 | |||||||||
4168 | exception_iterator exception_end() const { | ||||||||
4169 | return exception_begin() + getNumExceptions(); | ||||||||
4170 | } | ||||||||
4171 | |||||||||
4172 | /// Is there any interesting extra information for any of the parameters | ||||||||
4173 | /// of this function type? | ||||||||
4174 | bool hasExtParameterInfos() const { | ||||||||
4175 | return FunctionTypeBits.HasExtParameterInfos; | ||||||||
4176 | } | ||||||||
4177 | |||||||||
4178 | ArrayRef<ExtParameterInfo> getExtParameterInfos() const { | ||||||||
4179 | assert(hasExtParameterInfos())((hasExtParameterInfos()) ? static_cast<void> (0) : __assert_fail ("hasExtParameterInfos()", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 4179, __PRETTY_FUNCTION__)); | ||||||||
4180 | return ArrayRef<ExtParameterInfo>(getTrailingObjects<ExtParameterInfo>(), | ||||||||
4181 | getNumParams()); | ||||||||
4182 | } | ||||||||
4183 | |||||||||
4184 | /// Return a pointer to the beginning of the array of extra parameter | ||||||||
4185 | /// information, if present, or else null if none of the parameters | ||||||||
4186 | /// carry it. This is equivalent to getExtProtoInfo().ExtParameterInfos. | ||||||||
4187 | const ExtParameterInfo *getExtParameterInfosOrNull() const { | ||||||||
4188 | if (!hasExtParameterInfos()) | ||||||||
4189 | return nullptr; | ||||||||
4190 | return getTrailingObjects<ExtParameterInfo>(); | ||||||||
4191 | } | ||||||||
4192 | |||||||||
4193 | ExtParameterInfo getExtParameterInfo(unsigned I) const { | ||||||||
4194 | assert(I < getNumParams() && "parameter index out of range")((I < getNumParams() && "parameter index out of range" ) ? static_cast<void> (0) : __assert_fail ("I < getNumParams() && \"parameter index out of range\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 4194, __PRETTY_FUNCTION__)); | ||||||||
4195 | if (hasExtParameterInfos()) | ||||||||
4196 | return getTrailingObjects<ExtParameterInfo>()[I]; | ||||||||
4197 | return ExtParameterInfo(); | ||||||||
4198 | } | ||||||||
4199 | |||||||||
4200 | ParameterABI getParameterABI(unsigned I) const { | ||||||||
4201 | assert(I < getNumParams() && "parameter index out of range")((I < getNumParams() && "parameter index out of range" ) ? static_cast<void> (0) : __assert_fail ("I < getNumParams() && \"parameter index out of range\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 4201, __PRETTY_FUNCTION__)); | ||||||||
4202 | if (hasExtParameterInfos()) | ||||||||
4203 | return getTrailingObjects<ExtParameterInfo>()[I].getABI(); | ||||||||
4204 | return ParameterABI::Ordinary; | ||||||||
4205 | } | ||||||||
4206 | |||||||||
4207 | bool isParamConsumed(unsigned I) const { | ||||||||
4208 | assert(I < getNumParams() && "parameter index out of range")((I < getNumParams() && "parameter index out of range" ) ? static_cast<void> (0) : __assert_fail ("I < getNumParams() && \"parameter index out of range\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 4208, __PRETTY_FUNCTION__)); | ||||||||
4209 | if (hasExtParameterInfos()) | ||||||||
4210 | return getTrailingObjects<ExtParameterInfo>()[I].isConsumed(); | ||||||||
4211 | return false; | ||||||||
4212 | } | ||||||||
4213 | |||||||||
4214 | bool isSugared() const { return false; } | ||||||||
4215 | QualType desugar() const { return QualType(this, 0); } | ||||||||
4216 | |||||||||
4217 | void printExceptionSpecification(raw_ostream &OS, | ||||||||
4218 | const PrintingPolicy &Policy) const; | ||||||||
4219 | |||||||||
4220 | static bool classof(const Type *T) { | ||||||||
4221 | return T->getTypeClass() == FunctionProto; | ||||||||
4222 | } | ||||||||
4223 | |||||||||
4224 | void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx); | ||||||||
4225 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, | ||||||||
4226 | param_type_iterator ArgTys, unsigned NumArgs, | ||||||||
4227 | const ExtProtoInfo &EPI, const ASTContext &Context, | ||||||||
4228 | bool Canonical); | ||||||||
4229 | }; | ||||||||
4230 | |||||||||
4231 | /// Represents the dependent type named by a dependently-scoped | ||||||||
4232 | /// typename using declaration, e.g. | ||||||||
4233 | /// using typename Base<T>::foo; | ||||||||
4234 | /// | ||||||||
4235 | /// Template instantiation turns these into the underlying type. | ||||||||
4236 | class UnresolvedUsingType : public Type { | ||||||||
4237 | friend class ASTContext; // ASTContext creates these. | ||||||||
4238 | |||||||||
4239 | UnresolvedUsingTypenameDecl *Decl; | ||||||||
4240 | |||||||||
4241 | UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) | ||||||||
4242 | : Type(UnresolvedUsing, QualType(), true, true, false, | ||||||||
4243 | /*ContainsUnexpandedParameterPack=*/false), | ||||||||
4244 | Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} | ||||||||
4245 | |||||||||
4246 | public: | ||||||||
4247 | UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } | ||||||||
4248 | |||||||||
4249 | bool isSugared() const { return false; } | ||||||||
4250 | QualType desugar() const { return QualType(this, 0); } | ||||||||
4251 | |||||||||
4252 | static bool classof(const Type *T) { | ||||||||
4253 | return T->getTypeClass() == UnresolvedUsing; | ||||||||
4254 | } | ||||||||
4255 | |||||||||
4256 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||||
4257 | return Profile(ID, Decl); | ||||||||
4258 | } | ||||||||
4259 | |||||||||
4260 | static void Profile(llvm::FoldingSetNodeID &ID, | ||||||||
4261 | UnresolvedUsingTypenameDecl *D) { | ||||||||
4262 | ID.AddPointer(D); | ||||||||
4263 | } | ||||||||
4264 | }; | ||||||||
4265 | |||||||||
4266 | class TypedefType : public Type { | ||||||||
4267 | TypedefNameDecl *Decl; | ||||||||
4268 | |||||||||
4269 | protected: | ||||||||
4270 | friend class ASTContext; // ASTContext creates these. | ||||||||
4271 | |||||||||
4272 | TypedefType(TypeClass tc, const TypedefNameDecl *D, QualType can) | ||||||||
4273 | : Type(tc, can, can->isDependentType(), | ||||||||
4274 | can->isInstantiationDependentType(), | ||||||||
4275 | can->isVariablyModifiedType(), | ||||||||
4276 | /*ContainsUnexpandedParameterPack=*/false), | ||||||||
4277 | Decl(const_cast<TypedefNameDecl*>(D)) { | ||||||||
4278 | assert(!isa<TypedefType>(can) && "Invalid canonical type")((!isa<TypedefType>(can) && "Invalid canonical type" ) ? static_cast<void> (0) : __assert_fail ("!isa<TypedefType>(can) && \"Invalid canonical type\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 4278, __PRETTY_FUNCTION__)); | ||||||||
4279 | } | ||||||||
4280 | |||||||||
4281 | public: | ||||||||
4282 | TypedefNameDecl *getDecl() const { return Decl; } | ||||||||
4283 | |||||||||
4284 | bool isSugared() const { return true; } | ||||||||
4285 | QualType desugar() const; | ||||||||
4286 | |||||||||
4287 | static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } | ||||||||
4288 | }; | ||||||||
4289 | |||||||||
4290 | /// Sugar type that represents a type that was qualified by a qualifier written | ||||||||
4291 | /// as a macro invocation. | ||||||||
4292 | class MacroQualifiedType : public Type { | ||||||||
4293 | friend class ASTContext; // ASTContext creates these. | ||||||||
4294 | |||||||||
4295 | QualType UnderlyingTy; | ||||||||
4296 | const IdentifierInfo *MacroII; | ||||||||
4297 | |||||||||
4298 | MacroQualifiedType(QualType UnderlyingTy, QualType CanonTy, | ||||||||
4299 | const IdentifierInfo *MacroII) | ||||||||
4300 | : Type(MacroQualified, CanonTy, UnderlyingTy->isDependentType(), | ||||||||
4301 | UnderlyingTy->isInstantiationDependentType(), | ||||||||
4302 | UnderlyingTy->isVariablyModifiedType(), | ||||||||
4303 | UnderlyingTy->containsUnexpandedParameterPack()), | ||||||||
4304 | UnderlyingTy(UnderlyingTy), MacroII(MacroII) { | ||||||||
4305 | assert(isa<AttributedType>(UnderlyingTy) &&((isa<AttributedType>(UnderlyingTy) && "Expected a macro qualified type to only wrap attributed types." ) ? static_cast<void> (0) : __assert_fail ("isa<AttributedType>(UnderlyingTy) && \"Expected a macro qualified type to only wrap attributed types.\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 4306, __PRETTY_FUNCTION__)) | ||||||||
4306 | "Expected a macro qualified type to only wrap attributed types.")((isa<AttributedType>(UnderlyingTy) && "Expected a macro qualified type to only wrap attributed types." ) ? static_cast<void> (0) : __assert_fail ("isa<AttributedType>(UnderlyingTy) && \"Expected a macro qualified type to only wrap attributed types.\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 4306, __PRETTY_FUNCTION__)); | ||||||||
4307 | } | ||||||||
4308 | |||||||||
4309 | public: | ||||||||
4310 | const IdentifierInfo *getMacroIdentifier() const { return MacroII; } | ||||||||
4311 | QualType getUnderlyingType() const { return UnderlyingTy; } | ||||||||
4312 | |||||||||
4313 | /// Return this attributed type's modified type with no qualifiers attached to | ||||||||
4314 | /// it. | ||||||||
4315 | QualType getModifiedType() const; | ||||||||
4316 | |||||||||
4317 | bool isSugared() const { return true; } | ||||||||
4318 | QualType desugar() const; | ||||||||
4319 | |||||||||
4320 | static bool classof(const Type *T) { | ||||||||
4321 | return T->getTypeClass() == MacroQualified; | ||||||||
4322 | } | ||||||||
4323 | }; | ||||||||
4324 | |||||||||
4325 | /// Represents a `typeof` (or __typeof__) expression (a GCC extension). | ||||||||
4326 | class TypeOfExprType : public Type { | ||||||||
4327 | Expr *TOExpr; | ||||||||
4328 | |||||||||
4329 | protected: | ||||||||
4330 | friend class ASTContext; // ASTContext creates these. | ||||||||
4331 | |||||||||
4332 | TypeOfExprType(Expr *E, QualType can = QualType()); | ||||||||
4333 | |||||||||
4334 | public: | ||||||||
4335 | Expr *getUnderlyingExpr() const { return TOExpr; } | ||||||||
4336 | |||||||||
4337 | /// Remove a single level of sugar. | ||||||||
4338 | QualType desugar() const; | ||||||||
4339 | |||||||||
4340 | /// Returns whether this type directly provides sugar. | ||||||||
4341 | bool isSugared() const; | ||||||||
4342 | |||||||||
4343 | static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } | ||||||||
4344 | }; | ||||||||
4345 | |||||||||
4346 | /// Internal representation of canonical, dependent | ||||||||
4347 | /// `typeof(expr)` types. | ||||||||
4348 | /// | ||||||||
4349 | /// This class is used internally by the ASTContext to manage | ||||||||
4350 | /// canonical, dependent types, only. Clients will only see instances | ||||||||
4351 | /// of this class via TypeOfExprType nodes. | ||||||||
4352 | class DependentTypeOfExprType | ||||||||
4353 | : public TypeOfExprType, public llvm::FoldingSetNode { | ||||||||
4354 | const ASTContext &Context; | ||||||||
4355 | |||||||||
4356 | public: | ||||||||
4357 | DependentTypeOfExprType(const ASTContext &Context, Expr *E) | ||||||||
4358 | : TypeOfExprType(E), Context(Context) {} | ||||||||
4359 | |||||||||
4360 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||||
4361 | Profile(ID, Context, getUnderlyingExpr()); | ||||||||
4362 | } | ||||||||
4363 | |||||||||
4364 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, | ||||||||
4365 | Expr *E); | ||||||||
4366 | }; | ||||||||
4367 | |||||||||
4368 | /// Represents `typeof(type)`, a GCC extension. | ||||||||
4369 | class TypeOfType : public Type { | ||||||||
4370 | friend class ASTContext; // ASTContext creates these. | ||||||||
4371 | |||||||||
4372 | QualType TOType; | ||||||||
4373 | |||||||||
4374 | TypeOfType(QualType T, QualType can) | ||||||||
4375 | : Type(TypeOf, can, T->isDependentType(), | ||||||||
4376 | T->isInstantiationDependentType(), | ||||||||
4377 | T->isVariablyModifiedType(), | ||||||||
4378 | T->containsUnexpandedParameterPack()), | ||||||||
4379 | TOType(T) { | ||||||||
4380 | assert(!isa<TypedefType>(can) && "Invalid canonical type")((!isa<TypedefType>(can) && "Invalid canonical type" ) ? static_cast<void> (0) : __assert_fail ("!isa<TypedefType>(can) && \"Invalid canonical type\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 4380, __PRETTY_FUNCTION__)); | ||||||||
4381 | } | ||||||||
4382 | |||||||||
4383 | public: | ||||||||
4384 | QualType getUnderlyingType() const { return TOType; } | ||||||||
4385 | |||||||||
4386 | /// Remove a single level of sugar. | ||||||||
4387 | QualType desugar() const { return getUnderlyingType(); } | ||||||||
4388 | |||||||||
4389 | /// Returns whether this type directly provides sugar. | ||||||||
4390 | bool isSugared() const { return true; } | ||||||||
4391 | |||||||||
4392 | static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } | ||||||||
4393 | }; | ||||||||
4394 | |||||||||
4395 | /// Represents the type `decltype(expr)` (C++11). | ||||||||
4396 | class DecltypeType : public Type { | ||||||||
4397 | Expr *E; | ||||||||
4398 | QualType UnderlyingType; | ||||||||
4399 | |||||||||
4400 | protected: | ||||||||
4401 | friend class ASTContext; // ASTContext creates these. | ||||||||
4402 | |||||||||
4403 | DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); | ||||||||
4404 | |||||||||
4405 | public: | ||||||||
4406 | Expr *getUnderlyingExpr() const { return E; } | ||||||||
4407 | QualType getUnderlyingType() const { return UnderlyingType; } | ||||||||
4408 | |||||||||
4409 | /// Remove a single level of sugar. | ||||||||
4410 | QualType desugar() const; | ||||||||
4411 | |||||||||
4412 | /// Returns whether this type directly provides sugar. | ||||||||
4413 | bool isSugared() const; | ||||||||
4414 | |||||||||
4415 | static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } | ||||||||
4416 | }; | ||||||||
4417 | |||||||||
4418 | /// Internal representation of canonical, dependent | ||||||||
4419 | /// decltype(expr) types. | ||||||||
4420 | /// | ||||||||
4421 | /// This class is used internally by the ASTContext to manage | ||||||||
4422 | /// canonical, dependent types, only. Clients will only see instances | ||||||||
4423 | /// of this class via DecltypeType nodes. | ||||||||
4424 | class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { | ||||||||
4425 | const ASTContext &Context; | ||||||||
4426 | |||||||||
4427 | public: | ||||||||
4428 | DependentDecltypeType(const ASTContext &Context, Expr *E); | ||||||||
4429 | |||||||||
4430 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||||
4431 | Profile(ID, Context, getUnderlyingExpr()); | ||||||||
4432 | } | ||||||||
4433 | |||||||||
4434 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, | ||||||||
4435 | Expr *E); | ||||||||
4436 | }; | ||||||||
4437 | |||||||||
4438 | /// A unary type transform, which is a type constructed from another. | ||||||||
4439 | class UnaryTransformType : public Type { | ||||||||
4440 | public: | ||||||||
4441 | enum UTTKind { | ||||||||
4442 | EnumUnderlyingType | ||||||||
4443 | }; | ||||||||
4444 | |||||||||
4445 | private: | ||||||||
4446 | /// The untransformed type. | ||||||||
4447 | QualType BaseType; | ||||||||
4448 | |||||||||
4449 | /// The transformed type if not dependent, otherwise the same as BaseType. | ||||||||
4450 | QualType UnderlyingType; | ||||||||
4451 | |||||||||
4452 | UTTKind UKind; | ||||||||
4453 | |||||||||
4454 | protected: | ||||||||
4455 | friend class ASTContext; | ||||||||
4456 | |||||||||
4457 | UnaryTransformType(QualType BaseTy, QualType UnderlyingTy, UTTKind UKind, | ||||||||
4458 | QualType CanonicalTy); | ||||||||
4459 | |||||||||
4460 | public: | ||||||||
4461 | bool isSugared() const { return !isDependentType(); } | ||||||||
4462 | QualType desugar() const { return UnderlyingType; } | ||||||||
4463 | |||||||||
4464 | QualType getUnderlyingType() const { return UnderlyingType; } | ||||||||
4465 | QualType getBaseType() const { return BaseType; } | ||||||||
4466 | |||||||||
4467 | UTTKind getUTTKind() const { return UKind; } | ||||||||
4468 | |||||||||
4469 | static bool classof(const Type *T) { | ||||||||
4470 | return T->getTypeClass() == UnaryTransform; | ||||||||
4471 | } | ||||||||
4472 | }; | ||||||||
4473 | |||||||||
4474 | /// Internal representation of canonical, dependent | ||||||||
4475 | /// __underlying_type(type) types. | ||||||||
4476 | /// | ||||||||
4477 | /// This class is used internally by the ASTContext to manage | ||||||||
4478 | /// canonical, dependent types, only. Clients will only see instances | ||||||||
4479 | /// of this class via UnaryTransformType nodes. | ||||||||
4480 | class DependentUnaryTransformType : public UnaryTransformType, | ||||||||
4481 | public llvm::FoldingSetNode { | ||||||||
4482 | public: | ||||||||
4483 | DependentUnaryTransformType(const ASTContext &C, QualType BaseType, | ||||||||
4484 | UTTKind UKind); | ||||||||
4485 | |||||||||
4486 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||||
4487 | Profile(ID, getBaseType(), getUTTKind()); | ||||||||
4488 | } | ||||||||
4489 | |||||||||
4490 | static void Profile(llvm::FoldingSetNodeID &ID, QualType BaseType, | ||||||||
4491 | UTTKind UKind) { | ||||||||
4492 | ID.AddPointer(BaseType.getAsOpaquePtr()); | ||||||||
4493 | ID.AddInteger((unsigned)UKind); | ||||||||
4494 | } | ||||||||
4495 | }; | ||||||||
4496 | |||||||||
4497 | class TagType : public Type { | ||||||||
4498 | friend class ASTReader; | ||||||||
4499 | template <class T> friend class serialization::AbstractTypeReader; | ||||||||
4500 | |||||||||
4501 | /// Stores the TagDecl associated with this type. The decl may point to any | ||||||||
4502 | /// TagDecl that declares the entity. | ||||||||
4503 | TagDecl *decl; | ||||||||
4504 | |||||||||
4505 | protected: | ||||||||
4506 | TagType(TypeClass TC, const TagDecl *D, QualType can); | ||||||||
4507 | |||||||||
4508 | public: | ||||||||
4509 | TagDecl *getDecl() const; | ||||||||
4510 | |||||||||
4511 | /// Determines whether this type is in the process of being defined. | ||||||||
4512 | bool isBeingDefined() const; | ||||||||
4513 | |||||||||
4514 | static bool classof(const Type *T) { | ||||||||
4515 | return T->getTypeClass() == Enum || T->getTypeClass() == Record; | ||||||||
4516 | } | ||||||||
4517 | }; | ||||||||
4518 | |||||||||
4519 | /// A helper class that allows the use of isa/cast/dyncast | ||||||||
4520 | /// to detect TagType objects of structs/unions/classes. | ||||||||
4521 | class RecordType : public TagType { | ||||||||
4522 | protected: | ||||||||
4523 | friend class ASTContext; // ASTContext creates these. | ||||||||
4524 | |||||||||
4525 | explicit RecordType(const RecordDecl *D) | ||||||||
4526 | : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) {} | ||||||||
4527 | explicit RecordType(TypeClass TC, RecordDecl *D) | ||||||||
4528 | : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) {} | ||||||||
4529 | |||||||||
4530 | public: | ||||||||
4531 | RecordDecl *getDecl() const { | ||||||||
4532 | return reinterpret_cast<RecordDecl*>(TagType::getDecl()); | ||||||||
4533 | } | ||||||||
4534 | |||||||||
4535 | /// Recursively check all fields in the record for const-ness. If any field | ||||||||
4536 | /// is declared const, return true. Otherwise, return false. | ||||||||
4537 | bool hasConstFields() const; | ||||||||
4538 | |||||||||
4539 | bool isSugared() const { return false; } | ||||||||
4540 | QualType desugar() const { return QualType(this, 0); } | ||||||||
4541 | |||||||||
4542 | static bool classof(const Type *T) { return T->getTypeClass() == Record; } | ||||||||
4543 | }; | ||||||||
4544 | |||||||||
4545 | /// A helper class that allows the use of isa/cast/dyncast | ||||||||
4546 | /// to detect TagType objects of enums. | ||||||||
4547 | class EnumType : public TagType { | ||||||||
4548 | friend class ASTContext; // ASTContext creates these. | ||||||||
4549 | |||||||||
4550 | explicit EnumType(const EnumDecl *D) | ||||||||
4551 | : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) {} | ||||||||
4552 | |||||||||
4553 | public: | ||||||||
4554 | EnumDecl *getDecl() const { | ||||||||
4555 | return reinterpret_cast<EnumDecl*>(TagType::getDecl()); | ||||||||
4556 | } | ||||||||
4557 | |||||||||
4558 | bool isSugared() const { return false; } | ||||||||
4559 | QualType desugar() const { return QualType(this, 0); } | ||||||||
4560 | |||||||||
4561 | static bool classof(const Type *T) { return T->getTypeClass() == Enum; } | ||||||||
4562 | }; | ||||||||
4563 | |||||||||
4564 | /// An attributed type is a type to which a type attribute has been applied. | ||||||||
4565 | /// | ||||||||
4566 | /// The "modified type" is the fully-sugared type to which the attributed | ||||||||
4567 | /// type was applied; generally it is not canonically equivalent to the | ||||||||
4568 | /// attributed type. The "equivalent type" is the minimally-desugared type | ||||||||
4569 | /// which the type is canonically equivalent to. | ||||||||
4570 | /// | ||||||||
4571 | /// For example, in the following attributed type: | ||||||||
4572 | /// int32_t __attribute__((vector_size(16))) | ||||||||
4573 | /// - the modified type is the TypedefType for int32_t | ||||||||
4574 | /// - the equivalent type is VectorType(16, int32_t) | ||||||||
4575 | /// - the canonical type is VectorType(16, int) | ||||||||
4576 | class AttributedType : public Type, public llvm::FoldingSetNode { | ||||||||
4577 | public: | ||||||||
4578 | using Kind = attr::Kind; | ||||||||
4579 | |||||||||
4580 | private: | ||||||||
4581 | friend class ASTContext; // ASTContext creates these | ||||||||
4582 | |||||||||
4583 | QualType ModifiedType; | ||||||||
4584 | QualType EquivalentType; | ||||||||
4585 | |||||||||
4586 | AttributedType(QualType canon, attr::Kind attrKind, QualType modified, | ||||||||
4587 | QualType equivalent) | ||||||||
4588 | : Type(Attributed, canon, equivalent->isDependentType(), | ||||||||
4589 | equivalent->isInstantiationDependentType(), | ||||||||
4590 | equivalent->isVariablyModifiedType(), | ||||||||
4591 | equivalent->containsUnexpandedParameterPack()), | ||||||||
4592 | ModifiedType(modified), EquivalentType(equivalent) { | ||||||||
4593 | AttributedTypeBits.AttrKind = attrKind; | ||||||||
4594 | } | ||||||||
4595 | |||||||||
4596 | public: | ||||||||
4597 | Kind getAttrKind() const { | ||||||||
4598 | return static_cast<Kind>(AttributedTypeBits.AttrKind); | ||||||||
4599 | } | ||||||||
4600 | |||||||||
4601 | QualType getModifiedType() const { return ModifiedType; } | ||||||||
4602 | QualType getEquivalentType() const { return EquivalentType; } | ||||||||
4603 | |||||||||
4604 | bool isSugared() const { return true; } | ||||||||
4605 | QualType desugar() const { return getEquivalentType(); } | ||||||||
4606 | |||||||||
4607 | /// Does this attribute behave like a type qualifier? | ||||||||
4608 | /// | ||||||||
4609 | /// A type qualifier adjusts a type to provide specialized rules for | ||||||||
4610 | /// a specific object, like the standard const and volatile qualifiers. | ||||||||
4611 | /// This includes attributes controlling things like nullability, | ||||||||
4612 | /// address spaces, and ARC ownership. The value of the object is still | ||||||||
4613 | /// largely described by the modified type. | ||||||||
4614 | /// | ||||||||
4615 | /// In contrast, many type attributes "rewrite" their modified type to | ||||||||
4616 | /// produce a fundamentally different type, not necessarily related in any | ||||||||
4617 | /// formalizable way to the original type. For example, calling convention | ||||||||
4618 | /// and vector attributes are not simple type qualifiers. | ||||||||
4619 | /// | ||||||||
4620 | /// Type qualifiers are often, but not always, reflected in the canonical | ||||||||
4621 | /// type. | ||||||||
4622 | bool isQualifier() const; | ||||||||
4623 | |||||||||
4624 | bool isMSTypeSpec() const; | ||||||||
4625 | |||||||||
4626 | bool isCallingConv() const; | ||||||||
4627 | |||||||||
4628 | llvm::Optional<NullabilityKind> getImmediateNullability() const; | ||||||||
4629 | |||||||||
4630 | /// Retrieve the attribute kind corresponding to the given | ||||||||
4631 | /// nullability kind. | ||||||||
4632 | static Kind getNullabilityAttrKind(NullabilityKind kind) { | ||||||||
4633 | switch (kind) { | ||||||||
4634 | case NullabilityKind::NonNull: | ||||||||
4635 | return attr::TypeNonNull; | ||||||||
4636 | |||||||||
4637 | case NullabilityKind::Nullable: | ||||||||
4638 | return attr::TypeNullable; | ||||||||
4639 | |||||||||
4640 | case NullabilityKind::Unspecified: | ||||||||
4641 | return attr::TypeNullUnspecified; | ||||||||
4642 | } | ||||||||
4643 | llvm_unreachable("Unknown nullability kind.")::llvm::llvm_unreachable_internal("Unknown nullability kind." , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 4643); | ||||||||
4644 | } | ||||||||
4645 | |||||||||
4646 | /// Strip off the top-level nullability annotation on the given | ||||||||
4647 | /// type, if it's there. | ||||||||
4648 | /// | ||||||||
4649 | /// \param T The type to strip. If the type is exactly an | ||||||||
4650 | /// AttributedType specifying nullability (without looking through | ||||||||
4651 | /// type sugar), the nullability is returned and this type changed | ||||||||
4652 | /// to the underlying modified type. | ||||||||
4653 | /// | ||||||||
4654 | /// \returns the top-level nullability, if present. | ||||||||
4655 | static Optional<NullabilityKind> stripOuterNullability(QualType &T); | ||||||||
4656 | |||||||||
4657 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||||
4658 | Profile(ID, getAttrKind(), ModifiedType, EquivalentType); | ||||||||
4659 | } | ||||||||
4660 | |||||||||
4661 | static void Profile(llvm::FoldingSetNodeID &ID, Kind attrKind, | ||||||||
4662 | QualType modified, QualType equivalent) { | ||||||||
4663 | ID.AddInteger(attrKind); | ||||||||
4664 | ID.AddPointer(modified.getAsOpaquePtr()); | ||||||||
4665 | ID.AddPointer(equivalent.getAsOpaquePtr()); | ||||||||
4666 | } | ||||||||
4667 | |||||||||
4668 | static bool classof(const Type *T) { | ||||||||
4669 | return T->getTypeClass() == Attributed; | ||||||||
4670 | } | ||||||||
4671 | }; | ||||||||
4672 | |||||||||
4673 | class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { | ||||||||
4674 | friend class ASTContext; // ASTContext creates these | ||||||||
4675 | |||||||||
4676 | // Helper data collector for canonical types. | ||||||||
4677 | struct CanonicalTTPTInfo { | ||||||||
4678 | unsigned Depth : 15; | ||||||||
4679 | unsigned ParameterPack : 1; | ||||||||
4680 | unsigned Index : 16; | ||||||||
4681 | }; | ||||||||
4682 | |||||||||
4683 | union { | ||||||||
4684 | // Info for the canonical type. | ||||||||
4685 | CanonicalTTPTInfo CanTTPTInfo; | ||||||||
4686 | |||||||||
4687 | // Info for the non-canonical type. | ||||||||
4688 | TemplateTypeParmDecl *TTPDecl; | ||||||||
4689 | }; | ||||||||
4690 | |||||||||
4691 | /// Build a non-canonical type. | ||||||||
4692 | TemplateTypeParmType(TemplateTypeParmDecl *TTPDecl, QualType Canon) | ||||||||
4693 | : Type(TemplateTypeParm, Canon, /*Dependent=*/true, | ||||||||
4694 | /*InstantiationDependent=*/true, | ||||||||
4695 | /*VariablyModified=*/false, | ||||||||
4696 | Canon->containsUnexpandedParameterPack()), | ||||||||
4697 | TTPDecl(TTPDecl) {} | ||||||||
4698 | |||||||||
4699 | /// Build the canonical type. | ||||||||
4700 | TemplateTypeParmType(unsigned D, unsigned I, bool PP) | ||||||||
4701 | : Type(TemplateTypeParm, QualType(this, 0), | ||||||||
4702 | /*Dependent=*/true, | ||||||||
4703 | /*InstantiationDependent=*/true, | ||||||||
4704 | /*VariablyModified=*/false, PP) { | ||||||||
4705 | CanTTPTInfo.Depth = D; | ||||||||
4706 | CanTTPTInfo.Index = I; | ||||||||
4707 | CanTTPTInfo.ParameterPack = PP; | ||||||||
4708 | } | ||||||||
4709 | |||||||||
4710 | const CanonicalTTPTInfo& getCanTTPTInfo() const { | ||||||||
4711 | QualType Can = getCanonicalTypeInternal(); | ||||||||
4712 | return Can->castAs<TemplateTypeParmType>()->CanTTPTInfo; | ||||||||
4713 | } | ||||||||
4714 | |||||||||
4715 | public: | ||||||||
4716 | unsigned getDepth() const { return getCanTTPTInfo().Depth; } | ||||||||
4717 | unsigned getIndex() const { return getCanTTPTInfo().Index; } | ||||||||
4718 | bool isParameterPack() const { return getCanTTPTInfo().ParameterPack; } | ||||||||
4719 | |||||||||
4720 | TemplateTypeParmDecl *getDecl() const { | ||||||||
4721 | return isCanonicalUnqualified() ? nullptr : TTPDecl; | ||||||||
4722 | } | ||||||||
4723 | |||||||||
4724 | IdentifierInfo *getIdentifier() const; | ||||||||
4725 | |||||||||
4726 | bool isSugared() const { return false; } | ||||||||
4727 | QualType desugar() const { return QualType(this, 0); } | ||||||||
4728 | |||||||||
4729 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||||
4730 | Profile(ID, getDepth(), getIndex(), isParameterPack(), getDecl()); | ||||||||
4731 | } | ||||||||
4732 | |||||||||
4733 | static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, | ||||||||
4734 | unsigned Index, bool ParameterPack, | ||||||||
4735 | TemplateTypeParmDecl *TTPDecl) { | ||||||||
4736 | ID.AddInteger(Depth); | ||||||||
4737 | ID.AddInteger(Index); | ||||||||
4738 | ID.AddBoolean(ParameterPack); | ||||||||
4739 | ID.AddPointer(TTPDecl); | ||||||||
4740 | } | ||||||||
4741 | |||||||||
4742 | static bool classof(const Type *T) { | ||||||||
4743 | return T->getTypeClass() == TemplateTypeParm; | ||||||||
4744 | } | ||||||||
4745 | }; | ||||||||
4746 | |||||||||
4747 | /// Represents the result of substituting a type for a template | ||||||||
4748 | /// type parameter. | ||||||||
4749 | /// | ||||||||
4750 | /// Within an instantiated template, all template type parameters have | ||||||||
4751 | /// been replaced with these. They are used solely to record that a | ||||||||
4752 | /// type was originally written as a template type parameter; | ||||||||
4753 | /// therefore they are never canonical. | ||||||||
4754 | class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { | ||||||||
4755 | friend class ASTContext; | ||||||||
4756 | |||||||||
4757 | // The original type parameter. | ||||||||
4758 | const TemplateTypeParmType *Replaced; | ||||||||
4759 | |||||||||
4760 | SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) | ||||||||
4761 | : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType(), | ||||||||
4762 | Canon->isInstantiationDependentType(), | ||||||||
4763 | Canon->isVariablyModifiedType(), | ||||||||
4764 | Canon->containsUnexpandedParameterPack()), | ||||||||
4765 | Replaced(Param) {} | ||||||||
4766 | |||||||||
4767 | public: | ||||||||
4768 | /// Gets the template parameter that was substituted for. | ||||||||
4769 | const TemplateTypeParmType *getReplacedParameter() const { | ||||||||
4770 | return Replaced; | ||||||||
4771 | } | ||||||||
4772 | |||||||||
4773 | /// Gets the type that was substituted for the template | ||||||||
4774 | /// parameter. | ||||||||
4775 | QualType getReplacementType() const { | ||||||||
4776 | return getCanonicalTypeInternal(); | ||||||||
4777 | } | ||||||||
4778 | |||||||||
4779 | bool isSugared() const { return true; } | ||||||||
4780 | QualType desugar() const { return getReplacementType(); } | ||||||||
4781 | |||||||||
4782 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||||
4783 | Profile(ID, getReplacedParameter(), getReplacementType()); | ||||||||
4784 | } | ||||||||
4785 | |||||||||
4786 | static void Profile(llvm::FoldingSetNodeID &ID, | ||||||||
4787 | const TemplateTypeParmType *Replaced, | ||||||||
4788 | QualType Replacement) { | ||||||||
4789 | ID.AddPointer(Replaced); | ||||||||
4790 | ID.AddPointer(Replacement.getAsOpaquePtr()); | ||||||||
4791 | } | ||||||||
4792 | |||||||||
4793 | static bool classof(const Type *T) { | ||||||||
4794 | return T->getTypeClass() == SubstTemplateTypeParm; | ||||||||
4795 | } | ||||||||
4796 | }; | ||||||||
4797 | |||||||||
4798 | /// Represents the result of substituting a set of types for a template | ||||||||
4799 | /// type parameter pack. | ||||||||
4800 | /// | ||||||||
4801 | /// When a pack expansion in the source code contains multiple parameter packs | ||||||||
4802 | /// and those parameter packs correspond to different levels of template | ||||||||
4803 | /// parameter lists, this type node is used to represent a template type | ||||||||
4804 | /// parameter pack from an outer level, which has already had its argument pack | ||||||||
4805 | /// substituted but that still lives within a pack expansion that itself | ||||||||
4806 | /// could not be instantiated. When actually performing a substitution into | ||||||||
4807 | /// that pack expansion (e.g., when all template parameters have corresponding | ||||||||
4808 | /// arguments), this type will be replaced with the \c SubstTemplateTypeParmType | ||||||||
4809 | /// at the current pack substitution index. | ||||||||
4810 | class SubstTemplateTypeParmPackType : public Type, public llvm::FoldingSetNode { | ||||||||
4811 | friend class ASTContext; | ||||||||
4812 | |||||||||
4813 | /// The original type parameter. | ||||||||
4814 | const TemplateTypeParmType *Replaced; | ||||||||
4815 | |||||||||
4816 | /// A pointer to the set of template arguments that this | ||||||||
4817 | /// parameter pack is instantiated with. | ||||||||
4818 | const TemplateArgument *Arguments; | ||||||||
4819 | |||||||||
4820 | SubstTemplateTypeParmPackType(const TemplateTypeParmType *Param, | ||||||||
4821 | QualType Canon, | ||||||||
4822 | const TemplateArgument &ArgPack); | ||||||||
4823 | |||||||||
4824 | public: | ||||||||
4825 | IdentifierInfo *getIdentifier() const { return Replaced->getIdentifier(); } | ||||||||
4826 | |||||||||
4827 | /// Gets the template parameter that was substituted for. | ||||||||
4828 | const TemplateTypeParmType *getReplacedParameter() const { | ||||||||
4829 | return Replaced; | ||||||||
4830 | } | ||||||||
4831 | |||||||||
4832 | unsigned getNumArgs() const { | ||||||||
4833 | return SubstTemplateTypeParmPackTypeBits.NumArgs; | ||||||||
4834 | } | ||||||||
4835 | |||||||||
4836 | bool isSugared() const { return false; } | ||||||||
4837 | QualType desugar() const { return QualType(this, 0); } | ||||||||
4838 | |||||||||
4839 | TemplateArgument getArgumentPack() const; | ||||||||
4840 | |||||||||
4841 | void Profile(llvm::FoldingSetNodeID &ID); | ||||||||
4842 | static void Profile(llvm::FoldingSetNodeID &ID, | ||||||||
4843 | const TemplateTypeParmType *Replaced, | ||||||||
4844 | const TemplateArgument &ArgPack); | ||||||||
4845 | |||||||||
4846 | static bool classof(const Type *T) { | ||||||||
4847 | return T->getTypeClass() == SubstTemplateTypeParmPack; | ||||||||
4848 | } | ||||||||
4849 | }; | ||||||||
4850 | |||||||||
4851 | /// Common base class for placeholders for types that get replaced by | ||||||||
4852 | /// placeholder type deduction: C++11 auto, C++14 decltype(auto), C++17 deduced | ||||||||
4853 | /// class template types, and constrained type names. | ||||||||
4854 | /// | ||||||||
4855 | /// These types are usually a placeholder for a deduced type. However, before | ||||||||
4856 | /// the initializer is attached, or (usually) if the initializer is | ||||||||
4857 | /// type-dependent, there is no deduced type and the type is canonical. In | ||||||||
4858 | /// the latter case, it is also a dependent type. | ||||||||
4859 | class DeducedType : public Type { | ||||||||
4860 | protected: | ||||||||
4861 | DeducedType(TypeClass TC, QualType DeducedAsType, bool IsDependent, | ||||||||
4862 | bool IsInstantiationDependent, bool ContainsParameterPack) | ||||||||
4863 | : Type(TC, | ||||||||
4864 | // FIXME: Retain the sugared deduced type? | ||||||||
4865 | DeducedAsType.isNull() ? QualType(this, 0) | ||||||||
4866 | : DeducedAsType.getCanonicalType(), | ||||||||
4867 | IsDependent, IsInstantiationDependent, | ||||||||
4868 | /*VariablyModified=*/false, ContainsParameterPack) { | ||||||||
4869 | if (!DeducedAsType.isNull()) { | ||||||||
4870 | if (DeducedAsType->isDependentType()) | ||||||||
4871 | setDependent(); | ||||||||
4872 | if (DeducedAsType->isInstantiationDependentType()) | ||||||||
4873 | setInstantiationDependent(); | ||||||||
4874 | if (DeducedAsType->containsUnexpandedParameterPack()) | ||||||||
4875 | setContainsUnexpandedParameterPack(); | ||||||||
4876 | } | ||||||||
4877 | } | ||||||||
4878 | |||||||||
4879 | public: | ||||||||
4880 | bool isSugared() const { return !isCanonicalUnqualified(); } | ||||||||
4881 | QualType desugar() const { return getCanonicalTypeInternal(); } | ||||||||
4882 | |||||||||
4883 | /// Get the type deduced for this placeholder type, or null if it's | ||||||||
4884 | /// either not been deduced or was deduced to a dependent type. | ||||||||
4885 | QualType getDeducedType() const { | ||||||||
4886 | return !isCanonicalUnqualified() ? getCanonicalTypeInternal() : QualType(); | ||||||||
4887 | } | ||||||||
4888 | bool isDeduced() const { | ||||||||
4889 | return !isCanonicalUnqualified() || isDependentType(); | ||||||||
4890 | } | ||||||||
4891 | |||||||||
4892 | static bool classof(const Type *T) { | ||||||||
4893 | return T->getTypeClass() == Auto || | ||||||||
4894 | T->getTypeClass() == DeducedTemplateSpecialization; | ||||||||
4895 | } | ||||||||
4896 | }; | ||||||||
4897 | |||||||||
4898 | /// Represents a C++11 auto or C++14 decltype(auto) type, possibly constrained | ||||||||
4899 | /// by a type-constraint. | ||||||||
4900 | class alignas(8) AutoType : public DeducedType, public llvm::FoldingSetNode { | ||||||||
4901 | friend class ASTContext; // ASTContext creates these | ||||||||
4902 | |||||||||
4903 | ConceptDecl *TypeConstraintConcept; | ||||||||
4904 | |||||||||
4905 | AutoType(QualType DeducedAsType, AutoTypeKeyword Keyword, | ||||||||
4906 | bool IsDeducedAsDependent, bool IsDeducedAsPack, ConceptDecl *CD, | ||||||||
4907 | ArrayRef<TemplateArgument> TypeConstraintArgs); | ||||||||
4908 | |||||||||
4909 | const TemplateArgument *getArgBuffer() const { | ||||||||
4910 | return reinterpret_cast<const TemplateArgument*>(this+1); | ||||||||
4911 | } | ||||||||
4912 | |||||||||
4913 | TemplateArgument *getArgBuffer() { | ||||||||
4914 | return reinterpret_cast<TemplateArgument*>(this+1); | ||||||||
4915 | } | ||||||||
4916 | |||||||||
4917 | public: | ||||||||
4918 | /// Retrieve the template arguments. | ||||||||
4919 | const TemplateArgument *getArgs() const { | ||||||||
4920 | return getArgBuffer(); | ||||||||
4921 | } | ||||||||
4922 | |||||||||
4923 | /// Retrieve the number of template arguments. | ||||||||
4924 | unsigned getNumArgs() const { | ||||||||
4925 | return AutoTypeBits.NumArgs; | ||||||||
4926 | } | ||||||||
4927 | |||||||||
4928 | const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h | ||||||||
4929 | |||||||||
4930 | ArrayRef<TemplateArgument> getTypeConstraintArguments() const { | ||||||||
4931 | return {getArgs(), getNumArgs()}; | ||||||||
4932 | } | ||||||||
4933 | |||||||||
4934 | ConceptDecl *getTypeConstraintConcept() const { | ||||||||
4935 | return TypeConstraintConcept; | ||||||||
4936 | } | ||||||||
4937 | |||||||||
4938 | bool isConstrained() const { | ||||||||
4939 | return TypeConstraintConcept != nullptr; | ||||||||
4940 | } | ||||||||
4941 | |||||||||
4942 | bool isDecltypeAuto() const { | ||||||||
4943 | return getKeyword() == AutoTypeKeyword::DecltypeAuto; | ||||||||
4944 | } | ||||||||
4945 | |||||||||
4946 | AutoTypeKeyword getKeyword() const { | ||||||||
4947 | return (AutoTypeKeyword)AutoTypeBits.Keyword; | ||||||||
4948 | } | ||||||||
4949 | |||||||||
4950 | void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) { | ||||||||
4951 | Profile(ID, Context, getDeducedType(), getKeyword(), isDependentType(), | ||||||||
4952 | getTypeConstraintConcept(), getTypeConstraintArguments()); | ||||||||
4953 | } | ||||||||
4954 | |||||||||
4955 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, | ||||||||
4956 | QualType Deduced, AutoTypeKeyword Keyword, | ||||||||
4957 | bool IsDependent, ConceptDecl *CD, | ||||||||
4958 | ArrayRef<TemplateArgument> Arguments); | ||||||||
4959 | |||||||||
4960 | static bool classof(const Type *T) { | ||||||||
4961 | return T->getTypeClass() == Auto; | ||||||||
4962 | } | ||||||||
4963 | }; | ||||||||
4964 | |||||||||
4965 | /// Represents a C++17 deduced template specialization type. | ||||||||
4966 | class DeducedTemplateSpecializationType : public DeducedType, | ||||||||
4967 | public llvm::FoldingSetNode { | ||||||||
4968 | friend class ASTContext; // ASTContext creates these | ||||||||
4969 | |||||||||
4970 | /// The name of the template whose arguments will be deduced. | ||||||||
4971 | TemplateName Template; | ||||||||
4972 | |||||||||
4973 | DeducedTemplateSpecializationType(TemplateName Template, | ||||||||
4974 | QualType DeducedAsType, | ||||||||
4975 | bool IsDeducedAsDependent) | ||||||||
4976 | : DeducedType(DeducedTemplateSpecialization, DeducedAsType, | ||||||||
4977 | IsDeducedAsDependent || Template.isDependent(), | ||||||||
4978 | IsDeducedAsDependent || Template.isInstantiationDependent(), | ||||||||
4979 | Template.containsUnexpandedParameterPack()), | ||||||||
4980 | Template(Template) {} | ||||||||
4981 | |||||||||
4982 | public: | ||||||||
4983 | /// Retrieve the name of the template that we are deducing. | ||||||||
4984 | TemplateName getTemplateName() const { return Template;} | ||||||||
4985 | |||||||||
4986 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||||
4987 | Profile(ID, getTemplateName(), getDeducedType(), isDependentType()); | ||||||||
4988 | } | ||||||||
4989 | |||||||||
4990 | static void Profile(llvm::FoldingSetNodeID &ID, TemplateName Template, | ||||||||
4991 | QualType Deduced, bool IsDependent) { | ||||||||
4992 | Template.Profile(ID); | ||||||||
4993 | ID.AddPointer(Deduced.getAsOpaquePtr()); | ||||||||
4994 | ID.AddBoolean(IsDependent); | ||||||||
4995 | } | ||||||||
4996 | |||||||||
4997 | static bool classof(const Type *T) { | ||||||||
4998 | return T->getTypeClass() == DeducedTemplateSpecialization; | ||||||||
4999 | } | ||||||||
5000 | }; | ||||||||
5001 | |||||||||
5002 | /// Represents a type template specialization; the template | ||||||||
5003 | /// must be a class template, a type alias template, or a template | ||||||||
5004 | /// template parameter. A template which cannot be resolved to one of | ||||||||
5005 | /// these, e.g. because it is written with a dependent scope | ||||||||
5006 | /// specifier, is instead represented as a | ||||||||
5007 | /// @c DependentTemplateSpecializationType. | ||||||||
5008 | /// | ||||||||
5009 | /// A non-dependent template specialization type is always "sugar", | ||||||||
5010 | /// typically for a \c RecordType. For example, a class template | ||||||||
5011 | /// specialization type of \c vector<int> will refer to a tag type for | ||||||||
5012 | /// the instantiation \c std::vector<int, std::allocator<int>> | ||||||||
5013 | /// | ||||||||
5014 | /// Template specializations are dependent if either the template or | ||||||||
5015 | /// any of the template arguments are dependent, in which case the | ||||||||
5016 | /// type may also be canonical. | ||||||||
5017 | /// | ||||||||
5018 | /// Instances of this type are allocated with a trailing array of | ||||||||
5019 | /// TemplateArguments, followed by a QualType representing the | ||||||||
5020 | /// non-canonical aliased type when the template is a type alias | ||||||||
5021 | /// template. | ||||||||
5022 | class alignas(8) TemplateSpecializationType | ||||||||
5023 | : public Type, | ||||||||
5024 | public llvm::FoldingSetNode { | ||||||||
5025 | friend class ASTContext; // ASTContext creates these | ||||||||
5026 | |||||||||
5027 | /// The name of the template being specialized. This is | ||||||||
5028 | /// either a TemplateName::Template (in which case it is a | ||||||||
5029 | /// ClassTemplateDecl*, a TemplateTemplateParmDecl*, or a | ||||||||
5030 | /// TypeAliasTemplateDecl*), a | ||||||||
5031 | /// TemplateName::SubstTemplateTemplateParmPack, or a | ||||||||
5032 | /// TemplateName::SubstTemplateTemplateParm (in which case the | ||||||||
5033 | /// replacement must, recursively, be one of these). | ||||||||
5034 | TemplateName Template; | ||||||||
5035 | |||||||||
5036 | TemplateSpecializationType(TemplateName T, | ||||||||
5037 | ArrayRef<TemplateArgument> Args, | ||||||||
5038 | QualType Canon, | ||||||||
5039 | QualType Aliased); | ||||||||
5040 | |||||||||
5041 | public: | ||||||||
5042 | /// Determine whether any of the given template arguments are dependent. | ||||||||
5043 | static bool anyDependentTemplateArguments(ArrayRef<TemplateArgumentLoc> Args, | ||||||||
5044 | bool &InstantiationDependent); | ||||||||
5045 | |||||||||
5046 | static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &, | ||||||||
5047 | bool &InstantiationDependent); | ||||||||
5048 | |||||||||
5049 | /// True if this template specialization type matches a current | ||||||||
5050 | /// instantiation in the context in which it is found. | ||||||||
5051 | bool isCurrentInstantiation() const { | ||||||||
5052 | return isa<InjectedClassNameType>(getCanonicalTypeInternal()); | ||||||||
5053 | } | ||||||||
5054 | |||||||||
5055 | /// Determine if this template specialization type is for a type alias | ||||||||
5056 | /// template that has been substituted. | ||||||||
5057 | /// | ||||||||
5058 | /// Nearly every template specialization type whose template is an alias | ||||||||
5059 | /// template will be substituted. However, this is not the case when | ||||||||
5060 | /// the specialization contains a pack expansion but the template alias | ||||||||
5061 | /// does not have a corresponding parameter pack, e.g., | ||||||||
5062 | /// | ||||||||
5063 | /// \code | ||||||||
5064 | /// template<typename T, typename U, typename V> struct S; | ||||||||
5065 | /// template<typename T, typename U> using A = S<T, int, U>; | ||||||||
5066 | /// template<typename... Ts> struct X { | ||||||||
5067 | /// typedef A<Ts...> type; // not a type alias | ||||||||
5068 | /// }; | ||||||||
5069 | /// \endcode | ||||||||
5070 | bool isTypeAlias() const { return TemplateSpecializationTypeBits.TypeAlias; } | ||||||||
5071 | |||||||||
5072 | /// Get the aliased type, if this is a specialization of a type alias | ||||||||
5073 | /// template. | ||||||||
5074 | QualType getAliasedType() const { | ||||||||
5075 | assert(isTypeAlias() && "not a type alias template specialization")((isTypeAlias() && "not a type alias template specialization" ) ? static_cast<void> (0) : __assert_fail ("isTypeAlias() && \"not a type alias template specialization\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 5075, __PRETTY_FUNCTION__)); | ||||||||
5076 | return *reinterpret_cast<const QualType*>(end()); | ||||||||
5077 | } | ||||||||
5078 | |||||||||
5079 | using iterator = const TemplateArgument *; | ||||||||
5080 | |||||||||
5081 | iterator begin() const { return getArgs(); } | ||||||||
5082 | iterator end() const; // defined inline in TemplateBase.h | ||||||||
5083 | |||||||||
5084 | /// Retrieve the name of the template that we are specializing. | ||||||||
5085 | TemplateName getTemplateName() const { return Template; } | ||||||||
5086 | |||||||||
5087 | /// Retrieve the template arguments. | ||||||||
5088 | const TemplateArgument *getArgs() const { | ||||||||
5089 | return reinterpret_cast<const TemplateArgument *>(this + 1); | ||||||||
5090 | } | ||||||||
5091 | |||||||||
5092 | /// Retrieve the number of template arguments. | ||||||||
5093 | unsigned getNumArgs() const { | ||||||||
5094 | return TemplateSpecializationTypeBits.NumArgs; | ||||||||
5095 | } | ||||||||
5096 | |||||||||
5097 | /// Retrieve a specific template argument as a type. | ||||||||
5098 | /// \pre \c isArgType(Arg) | ||||||||
5099 | const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h | ||||||||
5100 | |||||||||
5101 | ArrayRef<TemplateArgument> template_arguments() const { | ||||||||
5102 | return {getArgs(), getNumArgs()}; | ||||||||
5103 | } | ||||||||
5104 | |||||||||
5105 | bool isSugared() const { | ||||||||
5106 | return !isDependentType() || isCurrentInstantiation() || isTypeAlias(); | ||||||||
5107 | } | ||||||||
5108 | |||||||||
5109 | QualType desugar() const { | ||||||||
5110 | return isTypeAlias() ? getAliasedType() : getCanonicalTypeInternal(); | ||||||||
5111 | } | ||||||||
5112 | |||||||||
5113 | void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) { | ||||||||
5114 | Profile(ID, Template, template_arguments(), Ctx); | ||||||||
5115 | if (isTypeAlias()) | ||||||||
5116 | getAliasedType().Profile(ID); | ||||||||
5117 | } | ||||||||
5118 | |||||||||
5119 | static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, | ||||||||
5120 | ArrayRef<TemplateArgument> Args, | ||||||||
5121 | const ASTContext &Context); | ||||||||
5122 | |||||||||
5123 | static bool classof(const Type *T) { | ||||||||
5124 | return T->getTypeClass() == TemplateSpecialization; | ||||||||
5125 | } | ||||||||
5126 | }; | ||||||||
5127 | |||||||||
5128 | /// Print a template argument list, including the '<' and '>' | ||||||||
5129 | /// enclosing the template arguments. | ||||||||
5130 | void printTemplateArgumentList(raw_ostream &OS, | ||||||||
5131 | ArrayRef<TemplateArgument> Args, | ||||||||
5132 | const PrintingPolicy &Policy); | ||||||||
5133 | |||||||||
5134 | void printTemplateArgumentList(raw_ostream &OS, | ||||||||
5135 | ArrayRef<TemplateArgumentLoc> Args, | ||||||||
5136 | const PrintingPolicy &Policy); | ||||||||
5137 | |||||||||
5138 | void printTemplateArgumentList(raw_ostream &OS, | ||||||||
5139 | const TemplateArgumentListInfo &Args, | ||||||||
5140 | const PrintingPolicy &Policy); | ||||||||
5141 | |||||||||
5142 | /// The injected class name of a C++ class template or class | ||||||||
5143 | /// template partial specialization. Used to record that a type was | ||||||||
5144 | /// spelled with a bare identifier rather than as a template-id; the | ||||||||
5145 | /// equivalent for non-templated classes is just RecordType. | ||||||||
5146 | /// | ||||||||
5147 | /// Injected class name types are always dependent. Template | ||||||||
5148 | /// instantiation turns these into RecordTypes. | ||||||||
5149 | /// | ||||||||
5150 | /// Injected class name types are always canonical. This works | ||||||||
5151 | /// because it is impossible to compare an injected class name type | ||||||||
5152 | /// with the corresponding non-injected template type, for the same | ||||||||
5153 | /// reason that it is impossible to directly compare template | ||||||||
5154 | /// parameters from different dependent contexts: injected class name | ||||||||
5155 | /// types can only occur within the scope of a particular templated | ||||||||
5156 | /// declaration, and within that scope every template specialization | ||||||||
5157 | /// will canonicalize to the injected class name (when appropriate | ||||||||
5158 | /// according to the rules of the language). | ||||||||
5159 | class InjectedClassNameType : public Type { | ||||||||
5160 | friend class ASTContext; // ASTContext creates these. | ||||||||
5161 | friend class ASTNodeImporter; | ||||||||
5162 | friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not | ||||||||
5163 | // currently suitable for AST reading, too much | ||||||||
5164 | // interdependencies. | ||||||||
5165 | template <class T> friend class serialization::AbstractTypeReader; | ||||||||
5166 | |||||||||
5167 | CXXRecordDecl *Decl; | ||||||||
5168 | |||||||||
5169 | /// The template specialization which this type represents. | ||||||||
5170 | /// For example, in | ||||||||
5171 | /// template <class T> class A { ... }; | ||||||||
5172 | /// this is A<T>, whereas in | ||||||||
5173 | /// template <class X, class Y> class A<B<X,Y> > { ... }; | ||||||||
5174 | /// this is A<B<X,Y> >. | ||||||||
5175 | /// | ||||||||
5176 | /// It is always unqualified, always a template specialization type, | ||||||||
5177 | /// and always dependent. | ||||||||
5178 | QualType InjectedType; | ||||||||
5179 | |||||||||
5180 | InjectedClassNameType(CXXRecordDecl *D, QualType TST) | ||||||||
5181 | : Type(InjectedClassName, QualType(), /*Dependent=*/true, | ||||||||
5182 | /*InstantiationDependent=*/true, | ||||||||
5183 | /*VariablyModified=*/false, | ||||||||
5184 | /*ContainsUnexpandedParameterPack=*/false), | ||||||||
5185 | Decl(D), InjectedType(TST) { | ||||||||
5186 | assert(isa<TemplateSpecializationType>(TST))((isa<TemplateSpecializationType>(TST)) ? static_cast< void> (0) : __assert_fail ("isa<TemplateSpecializationType>(TST)" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 5186, __PRETTY_FUNCTION__)); | ||||||||
5187 | assert(!TST.hasQualifiers())((!TST.hasQualifiers()) ? static_cast<void> (0) : __assert_fail ("!TST.hasQualifiers()", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 5187, __PRETTY_FUNCTION__)); | ||||||||
5188 | assert(TST->isDependentType())((TST->isDependentType()) ? static_cast<void> (0) : __assert_fail ("TST->isDependentType()", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 5188, __PRETTY_FUNCTION__)); | ||||||||
5189 | } | ||||||||
5190 | |||||||||
5191 | public: | ||||||||
5192 | QualType getInjectedSpecializationType() const { return InjectedType; } | ||||||||
5193 | |||||||||
5194 | const TemplateSpecializationType *getInjectedTST() const { | ||||||||
5195 | return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); | ||||||||
5196 | } | ||||||||
5197 | |||||||||
5198 | TemplateName getTemplateName() const { | ||||||||
5199 | return getInjectedTST()->getTemplateName(); | ||||||||
5200 | } | ||||||||
5201 | |||||||||
5202 | CXXRecordDecl *getDecl() const; | ||||||||
5203 | |||||||||
5204 | bool isSugared() const { return false; } | ||||||||
5205 | QualType desugar() const { return QualType(this, 0); } | ||||||||
5206 | |||||||||
5207 | static bool classof(const Type *T) { | ||||||||
5208 | return T->getTypeClass() == InjectedClassName; | ||||||||
5209 | } | ||||||||
5210 | }; | ||||||||
5211 | |||||||||
5212 | /// The kind of a tag type. | ||||||||
5213 | enum TagTypeKind { | ||||||||
5214 | /// The "struct" keyword. | ||||||||
5215 | TTK_Struct, | ||||||||
5216 | |||||||||
5217 | /// The "__interface" keyword. | ||||||||
5218 | TTK_Interface, | ||||||||
5219 | |||||||||
5220 | /// The "union" keyword. | ||||||||
5221 | TTK_Union, | ||||||||
5222 | |||||||||
5223 | /// The "class" keyword. | ||||||||
5224 | TTK_Class, | ||||||||
5225 | |||||||||
5226 | /// The "enum" keyword. | ||||||||
5227 | TTK_Enum | ||||||||
5228 | }; | ||||||||
5229 | |||||||||
5230 | /// The elaboration keyword that precedes a qualified type name or | ||||||||
5231 | /// introduces an elaborated-type-specifier. | ||||||||
5232 | enum ElaboratedTypeKeyword { | ||||||||
5233 | /// The "struct" keyword introduces the elaborated-type-specifier. | ||||||||
5234 | ETK_Struct, | ||||||||
5235 | |||||||||
5236 | /// The "__interface" keyword introduces the elaborated-type-specifier. | ||||||||
5237 | ETK_Interface, | ||||||||
5238 | |||||||||
5239 | /// The "union" keyword introduces the elaborated-type-specifier. | ||||||||
5240 | ETK_Union, | ||||||||
5241 | |||||||||
5242 | /// The "class" keyword introduces the elaborated-type-specifier. | ||||||||
5243 | ETK_Class, | ||||||||
5244 | |||||||||
5245 | /// The "enum" keyword introduces the elaborated-type-specifier. | ||||||||
5246 | ETK_Enum, | ||||||||
5247 | |||||||||
5248 | /// The "typename" keyword precedes the qualified type name, e.g., | ||||||||
5249 | /// \c typename T::type. | ||||||||
5250 | ETK_Typename, | ||||||||
5251 | |||||||||
5252 | /// No keyword precedes the qualified type name. | ||||||||
5253 | ETK_None | ||||||||
5254 | }; | ||||||||
5255 | |||||||||
5256 | /// A helper class for Type nodes having an ElaboratedTypeKeyword. | ||||||||
5257 | /// The keyword in stored in the free bits of the base class. | ||||||||
5258 | /// Also provides a few static helpers for converting and printing | ||||||||
5259 | /// elaborated type keyword and tag type kind enumerations. | ||||||||
5260 | class TypeWithKeyword : public Type { | ||||||||
5261 | protected: | ||||||||
5262 | TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, | ||||||||
5263 | QualType Canonical, bool Dependent, | ||||||||
5264 | bool InstantiationDependent, bool VariablyModified, | ||||||||
5265 | bool ContainsUnexpandedParameterPack) | ||||||||
5266 | : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified, | ||||||||
5267 | ContainsUnexpandedParameterPack) { | ||||||||
5268 | TypeWithKeywordBits.Keyword = Keyword; | ||||||||
5269 | } | ||||||||
5270 | |||||||||
5271 | public: | ||||||||
5272 | ElaboratedTypeKeyword getKeyword() const { | ||||||||
5273 | return static_cast<ElaboratedTypeKeyword>(TypeWithKeywordBits.Keyword); | ||||||||
5274 | } | ||||||||
5275 | |||||||||
5276 | /// Converts a type specifier (DeclSpec::TST) into an elaborated type keyword. | ||||||||
5277 | static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); | ||||||||
5278 | |||||||||
5279 | /// Converts a type specifier (DeclSpec::TST) into a tag type kind. | ||||||||
5280 | /// It is an error to provide a type specifier which *isn't* a tag kind here. | ||||||||
5281 | static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); | ||||||||
5282 | |||||||||
5283 | /// Converts a TagTypeKind into an elaborated type keyword. | ||||||||
5284 | static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); | ||||||||
5285 | |||||||||
5286 | /// Converts an elaborated type keyword into a TagTypeKind. | ||||||||
5287 | /// It is an error to provide an elaborated type keyword | ||||||||
5288 | /// which *isn't* a tag kind here. | ||||||||
5289 | static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); | ||||||||
5290 | |||||||||
5291 | static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); | ||||||||
5292 | |||||||||
5293 | static StringRef getKeywordName(ElaboratedTypeKeyword Keyword); | ||||||||
5294 | |||||||||
5295 | static StringRef getTagTypeKindName(TagTypeKind Kind) { | ||||||||
5296 | return getKeywordName(getKeywordForTagTypeKind(Kind)); | ||||||||
5297 | } | ||||||||
5298 | |||||||||
5299 | class CannotCastToThisType {}; | ||||||||
5300 | static CannotCastToThisType classof(const Type *); | ||||||||
5301 | }; | ||||||||
5302 | |||||||||
5303 | /// Represents a type that was referred to using an elaborated type | ||||||||
5304 | /// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, | ||||||||
5305 | /// or both. | ||||||||
5306 | /// | ||||||||
5307 | /// This type is used to keep track of a type name as written in the | ||||||||
5308 | /// source code, including tag keywords and any nested-name-specifiers. | ||||||||
5309 | /// The type itself is always "sugar", used to express what was written | ||||||||
5310 | /// in the source code but containing no additional semantic information. | ||||||||
5311 | class ElaboratedType final | ||||||||
5312 | : public TypeWithKeyword, | ||||||||
5313 | public llvm::FoldingSetNode, | ||||||||
5314 | private llvm::TrailingObjects<ElaboratedType, TagDecl *> { | ||||||||
5315 | friend class ASTContext; // ASTContext creates these | ||||||||
5316 | friend TrailingObjects; | ||||||||
5317 | |||||||||
5318 | /// The nested name specifier containing the qualifier. | ||||||||
5319 | NestedNameSpecifier *NNS; | ||||||||
5320 | |||||||||
5321 | /// The type that this qualified name refers to. | ||||||||
5322 | QualType NamedType; | ||||||||
5323 | |||||||||
5324 | /// The (re)declaration of this tag type owned by this occurrence is stored | ||||||||
5325 | /// as a trailing object if there is one. Use getOwnedTagDecl to obtain | ||||||||
5326 | /// it, or obtain a null pointer if there is none. | ||||||||
5327 | |||||||||
5328 | ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, | ||||||||
5329 | QualType NamedType, QualType CanonType, TagDecl *OwnedTagDecl) | ||||||||
5330 | : TypeWithKeyword(Keyword, Elaborated, CanonType, | ||||||||
5331 | NamedType->isDependentType(), | ||||||||
5332 | NamedType->isInstantiationDependentType(), | ||||||||
5333 | NamedType->isVariablyModifiedType(), | ||||||||
5334 | NamedType->containsUnexpandedParameterPack()), | ||||||||
5335 | NNS(NNS), NamedType(NamedType) { | ||||||||
5336 | ElaboratedTypeBits.HasOwnedTagDecl = false; | ||||||||
5337 | if (OwnedTagDecl) { | ||||||||
5338 | ElaboratedTypeBits.HasOwnedTagDecl = true; | ||||||||
5339 | *getTrailingObjects<TagDecl *>() = OwnedTagDecl; | ||||||||
5340 | } | ||||||||
5341 | assert(!(Keyword == ETK_None && NNS == nullptr) &&((!(Keyword == ETK_None && NNS == nullptr) && "ElaboratedType cannot have elaborated type keyword " "and name qualifier both null." ) ? static_cast<void> (0) : __assert_fail ("!(Keyword == ETK_None && NNS == nullptr) && \"ElaboratedType cannot have elaborated type keyword \" \"and name qualifier both null.\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 5343, __PRETTY_FUNCTION__)) | ||||||||
5342 | "ElaboratedType cannot have elaborated type keyword "((!(Keyword == ETK_None && NNS == nullptr) && "ElaboratedType cannot have elaborated type keyword " "and name qualifier both null." ) ? static_cast<void> (0) : __assert_fail ("!(Keyword == ETK_None && NNS == nullptr) && \"ElaboratedType cannot have elaborated type keyword \" \"and name qualifier both null.\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 5343, __PRETTY_FUNCTION__)) | ||||||||
5343 | "and name qualifier both null.")((!(Keyword == ETK_None && NNS == nullptr) && "ElaboratedType cannot have elaborated type keyword " "and name qualifier both null." ) ? static_cast<void> (0) : __assert_fail ("!(Keyword == ETK_None && NNS == nullptr) && \"ElaboratedType cannot have elaborated type keyword \" \"and name qualifier both null.\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 5343, __PRETTY_FUNCTION__)); | ||||||||
5344 | } | ||||||||
5345 | |||||||||
5346 | public: | ||||||||
5347 | /// Retrieve the qualification on this type. | ||||||||
5348 | NestedNameSpecifier *getQualifier() const { return NNS; } | ||||||||
5349 | |||||||||
5350 | /// Retrieve the type named by the qualified-id. | ||||||||
5351 | QualType getNamedType() const { return NamedType; } | ||||||||
5352 | |||||||||
5353 | /// Remove a single level of sugar. | ||||||||
5354 | QualType desugar() const { return getNamedType(); } | ||||||||
5355 | |||||||||
5356 | /// Returns whether this type directly provides sugar. | ||||||||
5357 | bool isSugared() const { return true; } | ||||||||
5358 | |||||||||
5359 | /// Return the (re)declaration of this type owned by this occurrence of this | ||||||||
5360 | /// type, or nullptr if there is none. | ||||||||
5361 | TagDecl *getOwnedTagDecl() const { | ||||||||
5362 | return ElaboratedTypeBits.HasOwnedTagDecl ? *getTrailingObjects<TagDecl *>() | ||||||||
5363 | : nullptr; | ||||||||
5364 | } | ||||||||
5365 | |||||||||
5366 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||||
5367 | Profile(ID, getKeyword(), NNS, NamedType, getOwnedTagDecl()); | ||||||||
5368 | } | ||||||||
5369 | |||||||||
5370 | static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, | ||||||||
5371 | NestedNameSpecifier *NNS, QualType NamedType, | ||||||||
5372 | TagDecl *OwnedTagDecl) { | ||||||||
5373 | ID.AddInteger(Keyword); | ||||||||
5374 | ID.AddPointer(NNS); | ||||||||
5375 | NamedType.Profile(ID); | ||||||||
5376 | ID.AddPointer(OwnedTagDecl); | ||||||||
5377 | } | ||||||||
5378 | |||||||||
5379 | static bool classof(const Type *T) { return T->getTypeClass() == Elaborated; } | ||||||||
5380 | }; | ||||||||
5381 | |||||||||
5382 | /// Represents a qualified type name for which the type name is | ||||||||
5383 | /// dependent. | ||||||||
5384 | /// | ||||||||
5385 | /// DependentNameType represents a class of dependent types that involve a | ||||||||
5386 | /// possibly dependent nested-name-specifier (e.g., "T::") followed by a | ||||||||
5387 | /// name of a type. The DependentNameType may start with a "typename" (for a | ||||||||
5388 | /// typename-specifier), "class", "struct", "union", or "enum" (for a | ||||||||
5389 | /// dependent elaborated-type-specifier), or nothing (in contexts where we | ||||||||
5390 | /// know that we must be referring to a type, e.g., in a base class specifier). | ||||||||
5391 | /// Typically the nested-name-specifier is dependent, but in MSVC compatibility | ||||||||
5392 | /// mode, this type is used with non-dependent names to delay name lookup until | ||||||||
5393 | /// instantiation. | ||||||||
5394 | class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { | ||||||||
5395 | friend class ASTContext; // ASTContext creates these | ||||||||
5396 | |||||||||
5397 | /// The nested name specifier containing the qualifier. | ||||||||
5398 | NestedNameSpecifier *NNS; | ||||||||
5399 | |||||||||
5400 | /// The type that this typename specifier refers to. | ||||||||
5401 | const IdentifierInfo *Name; | ||||||||
5402 | |||||||||
5403 | DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, | ||||||||
5404 | const IdentifierInfo *Name, QualType CanonType) | ||||||||
5405 | : TypeWithKeyword(Keyword, DependentName, CanonType, /*Dependent=*/true, | ||||||||
5406 | /*InstantiationDependent=*/true, | ||||||||
5407 | /*VariablyModified=*/false, | ||||||||
5408 | NNS->containsUnexpandedParameterPack()), | ||||||||
5409 | NNS(NNS), Name(Name) {} | ||||||||
5410 | |||||||||
5411 | public: | ||||||||
5412 | /// Retrieve the qualification on this type. | ||||||||
5413 | NestedNameSpecifier *getQualifier() const { return NNS; } | ||||||||
5414 | |||||||||
5415 | /// Retrieve the type named by the typename specifier as an identifier. | ||||||||
5416 | /// | ||||||||
5417 | /// This routine will return a non-NULL identifier pointer when the | ||||||||
5418 | /// form of the original typename was terminated by an identifier, | ||||||||
5419 | /// e.g., "typename T::type". | ||||||||
5420 | const IdentifierInfo *getIdentifier() const { | ||||||||
5421 | return Name; | ||||||||
5422 | } | ||||||||
5423 | |||||||||
5424 | bool isSugared() const { return false; } | ||||||||
5425 | QualType desugar() const { return QualType(this, 0); } | ||||||||
5426 | |||||||||
5427 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||||
5428 | Profile(ID, getKeyword(), NNS, Name); | ||||||||
5429 | } | ||||||||
5430 | |||||||||
5431 | static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, | ||||||||
5432 | NestedNameSpecifier *NNS, const IdentifierInfo *Name) { | ||||||||
5433 | ID.AddInteger(Keyword); | ||||||||
5434 | ID.AddPointer(NNS); | ||||||||
5435 | ID.AddPointer(Name); | ||||||||
5436 | } | ||||||||
5437 | |||||||||
5438 | static bool classof(const Type *T) { | ||||||||
5439 | return T->getTypeClass() == DependentName; | ||||||||
5440 | } | ||||||||
5441 | }; | ||||||||
5442 | |||||||||
5443 | /// Represents a template specialization type whose template cannot be | ||||||||
5444 | /// resolved, e.g. | ||||||||
5445 | /// A<T>::template B<T> | ||||||||
5446 | class alignas(8) DependentTemplateSpecializationType | ||||||||
5447 | : public TypeWithKeyword, | ||||||||
5448 | public llvm::FoldingSetNode { | ||||||||
5449 | friend class ASTContext; // ASTContext creates these | ||||||||
5450 | |||||||||
5451 | /// The nested name specifier containing the qualifier. | ||||||||
5452 | NestedNameSpecifier *NNS; | ||||||||
5453 | |||||||||
5454 | /// The identifier of the template. | ||||||||
5455 | const IdentifierInfo *Name; | ||||||||
5456 | |||||||||
5457 | DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, | ||||||||
5458 | NestedNameSpecifier *NNS, | ||||||||
5459 | const IdentifierInfo *Name, | ||||||||
5460 | ArrayRef<TemplateArgument> Args, | ||||||||
5461 | QualType Canon); | ||||||||
5462 | |||||||||
5463 | const TemplateArgument *getArgBuffer() const { | ||||||||
5464 | return reinterpret_cast<const TemplateArgument*>(this+1); | ||||||||
5465 | } | ||||||||
5466 | |||||||||
5467 | TemplateArgument *getArgBuffer() { | ||||||||
5468 | return reinterpret_cast<TemplateArgument*>(this+1); | ||||||||
5469 | } | ||||||||
5470 | |||||||||
5471 | public: | ||||||||
5472 | NestedNameSpecifier *getQualifier() const { return NNS; } | ||||||||
5473 | const IdentifierInfo *getIdentifier() const { return Name; } | ||||||||
5474 | |||||||||
5475 | /// Retrieve the template arguments. | ||||||||
5476 | const TemplateArgument *getArgs() const { | ||||||||
5477 | return getArgBuffer(); | ||||||||
5478 | } | ||||||||
5479 | |||||||||
5480 | /// Retrieve the number of template arguments. | ||||||||
5481 | unsigned getNumArgs() const { | ||||||||
5482 | return DependentTemplateSpecializationTypeBits.NumArgs; | ||||||||
5483 | } | ||||||||
5484 | |||||||||
5485 | const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h | ||||||||
5486 | |||||||||
5487 | ArrayRef<TemplateArgument> template_arguments() const { | ||||||||
5488 | return {getArgs(), getNumArgs()}; | ||||||||
5489 | } | ||||||||
5490 | |||||||||
5491 | using iterator = const TemplateArgument *; | ||||||||
5492 | |||||||||
5493 | iterator begin() const { return getArgs(); } | ||||||||
5494 | iterator end() const; // inline in TemplateBase.h | ||||||||
5495 | |||||||||
5496 | bool isSugared() const { return false; } | ||||||||
5497 | QualType desugar() const { return QualType(this, 0); } | ||||||||
5498 | |||||||||
5499 | void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) { | ||||||||
5500 | Profile(ID, Context, getKeyword(), NNS, Name, {getArgs(), getNumArgs()}); | ||||||||
5501 | } | ||||||||
5502 | |||||||||
5503 | static void Profile(llvm::FoldingSetNodeID &ID, | ||||||||
5504 | const ASTContext &Context, | ||||||||
5505 | ElaboratedTypeKeyword Keyword, | ||||||||
5506 | NestedNameSpecifier *Qualifier, | ||||||||
5507 | const IdentifierInfo *Name, | ||||||||
5508 | ArrayRef<TemplateArgument> Args); | ||||||||
5509 | |||||||||
5510 | static bool classof(const Type *T) { | ||||||||
5511 | return T->getTypeClass() == DependentTemplateSpecialization; | ||||||||
5512 | } | ||||||||
5513 | }; | ||||||||
5514 | |||||||||
5515 | /// Represents a pack expansion of types. | ||||||||
5516 | /// | ||||||||
5517 | /// Pack expansions are part of C++11 variadic templates. A pack | ||||||||
5518 | /// expansion contains a pattern, which itself contains one or more | ||||||||
5519 | /// "unexpanded" parameter packs. When instantiated, a pack expansion | ||||||||
5520 | /// produces a series of types, each instantiated from the pattern of | ||||||||
5521 | /// the expansion, where the Ith instantiation of the pattern uses the | ||||||||
5522 | /// Ith arguments bound to each of the unexpanded parameter packs. The | ||||||||
5523 | /// pack expansion is considered to "expand" these unexpanded | ||||||||
5524 | /// parameter packs. | ||||||||
5525 | /// | ||||||||
5526 | /// \code | ||||||||
5527 | /// template<typename ...Types> struct tuple; | ||||||||
5528 | /// | ||||||||
5529 | /// template<typename ...Types> | ||||||||
5530 | /// struct tuple_of_references { | ||||||||
5531 | /// typedef tuple<Types&...> type; | ||||||||
5532 | /// }; | ||||||||
5533 | /// \endcode | ||||||||
5534 | /// | ||||||||
5535 | /// Here, the pack expansion \c Types&... is represented via a | ||||||||
5536 | /// PackExpansionType whose pattern is Types&. | ||||||||
5537 | class PackExpansionType : public Type, public llvm::FoldingSetNode { | ||||||||
5538 | friend class ASTContext; // ASTContext creates these | ||||||||
5539 | |||||||||
5540 | /// The pattern of the pack expansion. | ||||||||
5541 | QualType Pattern; | ||||||||
5542 | |||||||||
5543 | PackExpansionType(QualType Pattern, QualType Canon, | ||||||||
5544 | Optional<unsigned> NumExpansions) | ||||||||
5545 | : Type(PackExpansion, Canon, /*Dependent=*/Pattern->isDependentType(), | ||||||||
5546 | /*InstantiationDependent=*/true, | ||||||||
5547 | /*VariablyModified=*/Pattern->isVariablyModifiedType(), | ||||||||
5548 | /*ContainsUnexpandedParameterPack=*/false), | ||||||||
5549 | Pattern(Pattern) { | ||||||||
5550 | PackExpansionTypeBits.NumExpansions = | ||||||||
5551 | NumExpansions ? *NumExpansions + 1 : 0; | ||||||||
5552 | } | ||||||||
5553 | |||||||||
5554 | public: | ||||||||
5555 | /// Retrieve the pattern of this pack expansion, which is the | ||||||||
5556 | /// type that will be repeatedly instantiated when instantiating the | ||||||||
5557 | /// pack expansion itself. | ||||||||
5558 | QualType getPattern() const { return Pattern; } | ||||||||
5559 | |||||||||
5560 | /// Retrieve the number of expansions that this pack expansion will | ||||||||
5561 | /// generate, if known. | ||||||||
5562 | Optional<unsigned> getNumExpansions() const { | ||||||||
5563 | if (PackExpansionTypeBits.NumExpansions) | ||||||||
5564 | return PackExpansionTypeBits.NumExpansions - 1; | ||||||||
5565 | return None; | ||||||||
5566 | } | ||||||||
5567 | |||||||||
5568 | bool isSugared() const { return !Pattern->isDependentType(); } | ||||||||
5569 | QualType desugar() const { return isSugared() ? Pattern : QualType(this, 0); } | ||||||||
5570 | |||||||||
5571 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||||
5572 | Profile(ID, getPattern(), getNumExpansions()); | ||||||||
5573 | } | ||||||||
5574 | |||||||||
5575 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Pattern, | ||||||||
5576 | Optional<unsigned> NumExpansions) { | ||||||||
5577 | ID.AddPointer(Pattern.getAsOpaquePtr()); | ||||||||
5578 | ID.AddBoolean(NumExpansions.hasValue()); | ||||||||
5579 | if (NumExpansions) | ||||||||
5580 | ID.AddInteger(*NumExpansions); | ||||||||
5581 | } | ||||||||
5582 | |||||||||
5583 | static bool classof(const Type *T) { | ||||||||
5584 | return T->getTypeClass() == PackExpansion; | ||||||||
5585 | } | ||||||||
5586 | }; | ||||||||
5587 | |||||||||
5588 | /// This class wraps the list of protocol qualifiers. For types that can | ||||||||
5589 | /// take ObjC protocol qualifers, they can subclass this class. | ||||||||
5590 | template <class T> | ||||||||
5591 | class ObjCProtocolQualifiers { | ||||||||
5592 | protected: | ||||||||
5593 | ObjCProtocolQualifiers() = default; | ||||||||
5594 | |||||||||
5595 | ObjCProtocolDecl * const *getProtocolStorage() const { | ||||||||
5596 | return const_cast<ObjCProtocolQualifiers*>(this)->getProtocolStorage(); | ||||||||
5597 | } | ||||||||
5598 | |||||||||
5599 | ObjCProtocolDecl **getProtocolStorage() { | ||||||||
5600 | return static_cast<T*>(this)->getProtocolStorageImpl(); | ||||||||
5601 | } | ||||||||
5602 | |||||||||
5603 | void setNumProtocols(unsigned N) { | ||||||||
5604 | static_cast<T*>(this)->setNumProtocolsImpl(N); | ||||||||
5605 | } | ||||||||
5606 | |||||||||
5607 | void initialize(ArrayRef<ObjCProtocolDecl *> protocols) { | ||||||||
5608 | setNumProtocols(protocols.size()); | ||||||||
5609 | assert(getNumProtocols() == protocols.size() &&((getNumProtocols() == protocols.size() && "bitfield overflow in protocol count" ) ? static_cast<void> (0) : __assert_fail ("getNumProtocols() == protocols.size() && \"bitfield overflow in protocol count\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 5610, __PRETTY_FUNCTION__)) | ||||||||
5610 | "bitfield overflow in protocol count")((getNumProtocols() == protocols.size() && "bitfield overflow in protocol count" ) ? static_cast<void> (0) : __assert_fail ("getNumProtocols() == protocols.size() && \"bitfield overflow in protocol count\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 5610, __PRETTY_FUNCTION__)); | ||||||||
5611 | if (!protocols.empty()) | ||||||||
5612 | memcpy(getProtocolStorage(), protocols.data(), | ||||||||
5613 | protocols.size() * sizeof(ObjCProtocolDecl*)); | ||||||||
5614 | } | ||||||||
5615 | |||||||||
5616 | public: | ||||||||
5617 | using qual_iterator = ObjCProtocolDecl * const *; | ||||||||
5618 | using qual_range = llvm::iterator_range<qual_iterator>; | ||||||||
5619 | |||||||||
5620 | qual_range quals() const { return qual_range(qual_begin(), qual_end()); } | ||||||||
5621 | qual_iterator qual_begin() const { return getProtocolStorage(); } | ||||||||
5622 | qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } | ||||||||
5623 | |||||||||
5624 | bool qual_empty() const { return getNumProtocols() == 0; } | ||||||||
5625 | |||||||||
5626 | /// Return the number of qualifying protocols in this type, or 0 if | ||||||||
5627 | /// there are none. | ||||||||
5628 | unsigned getNumProtocols() const { | ||||||||
5629 | return static_cast<const T*>(this)->getNumProtocolsImpl(); | ||||||||
5630 | } | ||||||||
5631 | |||||||||
5632 | /// Fetch a protocol by index. | ||||||||
5633 | ObjCProtocolDecl *getProtocol(unsigned I) const { | ||||||||
5634 | assert(I < getNumProtocols() && "Out-of-range protocol access")((I < getNumProtocols() && "Out-of-range protocol access" ) ? static_cast<void> (0) : __assert_fail ("I < getNumProtocols() && \"Out-of-range protocol access\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 5634, __PRETTY_FUNCTION__)); | ||||||||
5635 | return qual_begin()[I]; | ||||||||
5636 | } | ||||||||
5637 | |||||||||
5638 | /// Retrieve all of the protocol qualifiers. | ||||||||
5639 | ArrayRef<ObjCProtocolDecl *> getProtocols() const { | ||||||||
5640 | return ArrayRef<ObjCProtocolDecl *>(qual_begin(), getNumProtocols()); | ||||||||
5641 | } | ||||||||
5642 | }; | ||||||||
5643 | |||||||||
5644 | /// Represents a type parameter type in Objective C. It can take | ||||||||
5645 | /// a list of protocols. | ||||||||
5646 | class ObjCTypeParamType : public Type, | ||||||||
5647 | public ObjCProtocolQualifiers<ObjCTypeParamType>, | ||||||||
5648 | public llvm::FoldingSetNode { | ||||||||
5649 | friend class ASTContext; | ||||||||
5650 | friend class ObjCProtocolQualifiers<ObjCTypeParamType>; | ||||||||
5651 | |||||||||
5652 | /// The number of protocols stored on this type. | ||||||||
5653 | unsigned NumProtocols : 6; | ||||||||
5654 | |||||||||
5655 | ObjCTypeParamDecl *OTPDecl; | ||||||||
5656 | |||||||||
5657 | /// The protocols are stored after the ObjCTypeParamType node. In the | ||||||||
5658 | /// canonical type, the list of protocols are sorted alphabetically | ||||||||
5659 | /// and uniqued. | ||||||||
5660 | ObjCProtocolDecl **getProtocolStorageImpl(); | ||||||||
5661 | |||||||||
5662 | /// Return the number of qualifying protocols in this interface type, | ||||||||
5663 | /// or 0 if there are none. | ||||||||
5664 | unsigned getNumProtocolsImpl() const { | ||||||||
5665 | return NumProtocols; | ||||||||
5666 | } | ||||||||
5667 | |||||||||
5668 | void setNumProtocolsImpl(unsigned N) { | ||||||||
5669 | NumProtocols = N; | ||||||||
5670 | } | ||||||||
5671 | |||||||||
5672 | ObjCTypeParamType(const ObjCTypeParamDecl *D, | ||||||||
5673 | QualType can, | ||||||||
5674 | ArrayRef<ObjCProtocolDecl *> protocols); | ||||||||
5675 | |||||||||
5676 | public: | ||||||||
5677 | bool isSugared() const { return true; } | ||||||||
5678 | QualType desugar() const { return getCanonicalTypeInternal(); } | ||||||||
5679 | |||||||||
5680 | static bool classof(const Type *T) { | ||||||||
5681 | return T->getTypeClass() == ObjCTypeParam; | ||||||||
5682 | } | ||||||||
5683 | |||||||||
5684 | void Profile(llvm::FoldingSetNodeID &ID); | ||||||||
5685 | static void Profile(llvm::FoldingSetNodeID &ID, | ||||||||
5686 | const ObjCTypeParamDecl *OTPDecl, | ||||||||
5687 | ArrayRef<ObjCProtocolDecl *> protocols); | ||||||||
5688 | |||||||||
5689 | ObjCTypeParamDecl *getDecl() const { return OTPDecl; } | ||||||||
5690 | }; | ||||||||
5691 | |||||||||
5692 | /// Represents a class type in Objective C. | ||||||||
5693 | /// | ||||||||
5694 | /// Every Objective C type is a combination of a base type, a set of | ||||||||
5695 | /// type arguments (optional, for parameterized classes) and a list of | ||||||||
5696 | /// protocols. | ||||||||
5697 | /// | ||||||||
5698 | /// Given the following declarations: | ||||||||
5699 | /// \code | ||||||||
5700 | /// \@class C<T>; | ||||||||
5701 | /// \@protocol P; | ||||||||
5702 | /// \endcode | ||||||||
5703 | /// | ||||||||
5704 | /// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType | ||||||||
5705 | /// with base C and no protocols. | ||||||||
5706 | /// | ||||||||
5707 | /// 'C<P>' is an unspecialized ObjCObjectType with base C and protocol list [P]. | ||||||||
5708 | /// 'C<C*>' is a specialized ObjCObjectType with type arguments 'C*' and no | ||||||||
5709 | /// protocol list. | ||||||||
5710 | /// 'C<C*><P>' is a specialized ObjCObjectType with base C, type arguments 'C*', | ||||||||
5711 | /// and protocol list [P]. | ||||||||
5712 | /// | ||||||||
5713 | /// 'id' is a TypedefType which is sugar for an ObjCObjectPointerType whose | ||||||||
5714 | /// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType | ||||||||
5715 | /// and no protocols. | ||||||||
5716 | /// | ||||||||
5717 | /// 'id<P>' is an ObjCObjectPointerType whose pointee is an ObjCObjectType | ||||||||
5718 | /// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually | ||||||||
5719 | /// this should get its own sugar class to better represent the source. | ||||||||
5720 | class ObjCObjectType : public Type, | ||||||||
5721 | public ObjCProtocolQualifiers<ObjCObjectType> { | ||||||||
5722 | friend class ObjCProtocolQualifiers<ObjCObjectType>; | ||||||||
5723 | |||||||||
5724 | // ObjCObjectType.NumTypeArgs - the number of type arguments stored | ||||||||
5725 | // after the ObjCObjectPointerType node. | ||||||||
5726 | // ObjCObjectType.NumProtocols - the number of protocols stored | ||||||||
5727 | // after the type arguments of ObjCObjectPointerType node. | ||||||||
5728 | // | ||||||||
5729 | // These protocols are those written directly on the type. If | ||||||||
5730 | // protocol qualifiers ever become additive, the iterators will need | ||||||||
5731 | // to get kindof complicated. | ||||||||
5732 | // | ||||||||
5733 | // In the canonical object type, these are sorted alphabetically | ||||||||
5734 | // and uniqued. | ||||||||
5735 | |||||||||
5736 | /// Either a BuiltinType or an InterfaceType or sugar for either. | ||||||||
5737 | QualType BaseType; | ||||||||
5738 | |||||||||
5739 | /// Cached superclass type. | ||||||||
5740 | mutable llvm::PointerIntPair<const ObjCObjectType *, 1, bool> | ||||||||
5741 | CachedSuperClassType; | ||||||||
5742 | |||||||||
5743 | QualType *getTypeArgStorage(); | ||||||||
5744 | const QualType *getTypeArgStorage() const { | ||||||||
5745 | return const_cast<ObjCObjectType *>(this)->getTypeArgStorage(); | ||||||||
5746 | } | ||||||||
5747 | |||||||||
5748 | ObjCProtocolDecl **getProtocolStorageImpl(); | ||||||||
5749 | /// Return the number of qualifying protocols in this interface type, | ||||||||
5750 | /// or 0 if there are none. | ||||||||
5751 | unsigned getNumProtocolsImpl() const { | ||||||||
5752 | return ObjCObjectTypeBits.NumProtocols; | ||||||||
5753 | } | ||||||||
5754 | void setNumProtocolsImpl(unsigned N) { | ||||||||
5755 | ObjCObjectTypeBits.NumProtocols = N; | ||||||||
5756 | } | ||||||||
5757 | |||||||||
5758 | protected: | ||||||||
5759 | enum Nonce_ObjCInterface { Nonce_ObjCInterface }; | ||||||||
5760 | |||||||||
5761 | ObjCObjectType(QualType Canonical, QualType Base, | ||||||||
5762 | ArrayRef<QualType> typeArgs, | ||||||||
5763 | ArrayRef<ObjCProtocolDecl *> protocols, | ||||||||
5764 | bool isKindOf); | ||||||||
5765 | |||||||||
5766 | ObjCObjectType(enum Nonce_ObjCInterface) | ||||||||
5767 | : Type(ObjCInterface, QualType(), false, false, false, false), | ||||||||
5768 | BaseType(QualType(this_(), 0)) { | ||||||||
5769 | ObjCObjectTypeBits.NumProtocols = 0; | ||||||||
5770 | ObjCObjectTypeBits.NumTypeArgs = 0; | ||||||||
5771 | ObjCObjectTypeBits.IsKindOf = 0; | ||||||||
5772 | } | ||||||||
5773 | |||||||||
5774 | void computeSuperClassTypeSlow() const; | ||||||||
5775 | |||||||||
5776 | public: | ||||||||
5777 | /// Gets the base type of this object type. This is always (possibly | ||||||||
5778 | /// sugar for) one of: | ||||||||
5779 | /// - the 'id' builtin type (as opposed to the 'id' type visible to the | ||||||||
5780 | /// user, which is a typedef for an ObjCObjectPointerType) | ||||||||
5781 | /// - the 'Class' builtin type (same caveat) | ||||||||
5782 | /// - an ObjCObjectType (currently always an ObjCInterfaceType) | ||||||||
5783 | QualType getBaseType() const { return BaseType; } | ||||||||
5784 | |||||||||
5785 | bool isObjCId() const { | ||||||||
5786 | return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); | ||||||||
5787 | } | ||||||||
5788 | |||||||||
5789 | bool isObjCClass() const { | ||||||||
5790 | return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); | ||||||||
5791 | } | ||||||||
5792 | |||||||||
5793 | bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } | ||||||||
5794 | bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } | ||||||||
5795 | bool isObjCUnqualifiedIdOrClass() const { | ||||||||
5796 | if (!qual_empty()) return false; | ||||||||
5797 | if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) | ||||||||
5798 | return T->getKind() == BuiltinType::ObjCId || | ||||||||
5799 | T->getKind() == BuiltinType::ObjCClass; | ||||||||
5800 | return false; | ||||||||
5801 | } | ||||||||
5802 | bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } | ||||||||
5803 | bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } | ||||||||
5804 | |||||||||
5805 | /// Gets the interface declaration for this object type, if the base type | ||||||||
5806 | /// really is an interface. | ||||||||
5807 | ObjCInterfaceDecl *getInterface() const; | ||||||||
5808 | |||||||||
5809 | /// Determine whether this object type is "specialized", meaning | ||||||||
5810 | /// that it has type arguments. | ||||||||
5811 | bool isSpecialized() const; | ||||||||
5812 | |||||||||
5813 | /// Determine whether this object type was written with type arguments. | ||||||||
5814 | bool isSpecializedAsWritten() const { | ||||||||
5815 | return ObjCObjectTypeBits.NumTypeArgs > 0; | ||||||||
5816 | } | ||||||||
5817 | |||||||||
5818 | /// Determine whether this object type is "unspecialized", meaning | ||||||||
5819 | /// that it has no type arguments. | ||||||||
5820 | bool isUnspecialized() const { return !isSpecialized(); } | ||||||||
5821 | |||||||||
5822 | /// Determine whether this object type is "unspecialized" as | ||||||||
5823 | /// written, meaning that it has no type arguments. | ||||||||
5824 | bool isUnspecializedAsWritten() const { return !isSpecializedAsWritten(); } | ||||||||
5825 | |||||||||
5826 | /// Retrieve the type arguments of this object type (semantically). | ||||||||
5827 | ArrayRef<QualType> getTypeArgs() const; | ||||||||
5828 | |||||||||
5829 | /// Retrieve the type arguments of this object type as they were | ||||||||
5830 | /// written. | ||||||||
5831 | ArrayRef<QualType> getTypeArgsAsWritten() const { | ||||||||
5832 | return llvm::makeArrayRef(getTypeArgStorage(), | ||||||||
5833 | ObjCObjectTypeBits.NumTypeArgs); | ||||||||
5834 | } | ||||||||
5835 | |||||||||
5836 | /// Whether this is a "__kindof" type as written. | ||||||||
5837 | bool isKindOfTypeAsWritten() const { return ObjCObjectTypeBits.IsKindOf; } | ||||||||
5838 | |||||||||
5839 | /// Whether this ia a "__kindof" type (semantically). | ||||||||
5840 | bool isKindOfType() const; | ||||||||
5841 | |||||||||
5842 | /// Retrieve the type of the superclass of this object type. | ||||||||
5843 | /// | ||||||||
5844 | /// This operation substitutes any type arguments into the | ||||||||
5845 | /// superclass of the current class type, potentially producing a | ||||||||
5846 | /// specialization of the superclass type. Produces a null type if | ||||||||
5847 | /// there is no superclass. | ||||||||
5848 | QualType getSuperClassType() const { | ||||||||
5849 | if (!CachedSuperClassType.getInt()) | ||||||||
5850 | computeSuperClassTypeSlow(); | ||||||||
5851 | |||||||||
5852 | assert(CachedSuperClassType.getInt() && "Superclass not set?")((CachedSuperClassType.getInt() && "Superclass not set?" ) ? static_cast<void> (0) : __assert_fail ("CachedSuperClassType.getInt() && \"Superclass not set?\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 5852, __PRETTY_FUNCTION__)); | ||||||||
5853 | return QualType(CachedSuperClassType.getPointer(), 0); | ||||||||
5854 | } | ||||||||
5855 | |||||||||
5856 | /// Strip off the Objective-C "kindof" type and (with it) any | ||||||||
5857 | /// protocol qualifiers. | ||||||||
5858 | QualType stripObjCKindOfTypeAndQuals(const ASTContext &ctx) const; | ||||||||
5859 | |||||||||
5860 | bool isSugared() const { return false; } | ||||||||
5861 | QualType desugar() const { return QualType(this, 0); } | ||||||||
5862 | |||||||||
5863 | static bool classof(const Type *T) { | ||||||||
5864 | return T->getTypeClass() == ObjCObject || | ||||||||
5865 | T->getTypeClass() == ObjCInterface; | ||||||||
5866 | } | ||||||||
5867 | }; | ||||||||
5868 | |||||||||
5869 | /// A class providing a concrete implementation | ||||||||
5870 | /// of ObjCObjectType, so as to not increase the footprint of | ||||||||
5871 | /// ObjCInterfaceType. Code outside of ASTContext and the core type | ||||||||
5872 | /// system should not reference this type. | ||||||||
5873 | class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { | ||||||||
5874 | friend class ASTContext; | ||||||||
5875 | |||||||||
5876 | // If anyone adds fields here, ObjCObjectType::getProtocolStorage() | ||||||||
5877 | // will need to be modified. | ||||||||
5878 | |||||||||
5879 | ObjCObjectTypeImpl(QualType Canonical, QualType Base, | ||||||||
5880 | ArrayRef<QualType> typeArgs, | ||||||||
5881 | ArrayRef<ObjCProtocolDecl *> protocols, | ||||||||
5882 | bool isKindOf) | ||||||||
5883 | : ObjCObjectType(Canonical, Base, typeArgs, protocols, isKindOf) {} | ||||||||
5884 | |||||||||
5885 | public: | ||||||||
5886 | void Profile(llvm::FoldingSetNodeID &ID); | ||||||||
5887 | static void Profile(llvm::FoldingSetNodeID &ID, | ||||||||
5888 | QualType Base, | ||||||||
5889 | ArrayRef<QualType> typeArgs, | ||||||||
5890 | ArrayRef<ObjCProtocolDecl *> protocols, | ||||||||
5891 | bool isKindOf); | ||||||||
5892 | }; | ||||||||
5893 | |||||||||
5894 | inline QualType *ObjCObjectType::getTypeArgStorage() { | ||||||||
5895 | return reinterpret_cast<QualType *>(static_cast<ObjCObjectTypeImpl*>(this)+1); | ||||||||
5896 | } | ||||||||
5897 | |||||||||
5898 | inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorageImpl() { | ||||||||
5899 | return reinterpret_cast<ObjCProtocolDecl**>( | ||||||||
5900 | getTypeArgStorage() + ObjCObjectTypeBits.NumTypeArgs); | ||||||||
5901 | } | ||||||||
5902 | |||||||||
5903 | inline ObjCProtocolDecl **ObjCTypeParamType::getProtocolStorageImpl() { | ||||||||
5904 | return reinterpret_cast<ObjCProtocolDecl**>( | ||||||||
5905 | static_cast<ObjCTypeParamType*>(this)+1); | ||||||||
5906 | } | ||||||||
5907 | |||||||||
5908 | /// Interfaces are the core concept in Objective-C for object oriented design. | ||||||||
5909 | /// They basically correspond to C++ classes. There are two kinds of interface | ||||||||
5910 | /// types: normal interfaces like `NSString`, and qualified interfaces, which | ||||||||
5911 | /// are qualified with a protocol list like `NSString<NSCopyable, NSAmazing>`. | ||||||||
5912 | /// | ||||||||
5913 | /// ObjCInterfaceType guarantees the following properties when considered | ||||||||
5914 | /// as a subtype of its superclass, ObjCObjectType: | ||||||||
5915 | /// - There are no protocol qualifiers. To reinforce this, code which | ||||||||
5916 | /// tries to invoke the protocol methods via an ObjCInterfaceType will | ||||||||
5917 | /// fail to compile. | ||||||||
5918 | /// - It is its own base type. That is, if T is an ObjCInterfaceType*, | ||||||||
5919 | /// T->getBaseType() == QualType(T, 0). | ||||||||
5920 | class ObjCInterfaceType : public ObjCObjectType { | ||||||||
5921 | friend class ASTContext; // ASTContext creates these. | ||||||||
5922 | friend class ASTReader; | ||||||||
5923 | friend class ObjCInterfaceDecl; | ||||||||
5924 | template <class T> friend class serialization::AbstractTypeReader; | ||||||||
5925 | |||||||||
5926 | mutable ObjCInterfaceDecl *Decl; | ||||||||
5927 | |||||||||
5928 | ObjCInterfaceType(const ObjCInterfaceDecl *D) | ||||||||
5929 | : ObjCObjectType(Nonce_ObjCInterface), | ||||||||
5930 | Decl(const_cast<ObjCInterfaceDecl*>(D)) {} | ||||||||
5931 | |||||||||
5932 | public: | ||||||||
5933 | /// Get the declaration of this interface. | ||||||||
5934 | ObjCInterfaceDecl *getDecl() const { return Decl; } | ||||||||
5935 | |||||||||
5936 | bool isSugared() const { return false; } | ||||||||
5937 | QualType desugar() const { return QualType(this, 0); } | ||||||||
5938 | |||||||||
5939 | static bool classof(const Type *T) { | ||||||||
5940 | return T->getTypeClass() == ObjCInterface; | ||||||||
5941 | } | ||||||||
5942 | |||||||||
5943 | // Nonsense to "hide" certain members of ObjCObjectType within this | ||||||||
5944 | // class. People asking for protocols on an ObjCInterfaceType are | ||||||||
5945 | // not going to get what they want: ObjCInterfaceTypes are | ||||||||
5946 | // guaranteed to have no protocols. | ||||||||
5947 | enum { | ||||||||
5948 | qual_iterator, | ||||||||
5949 | qual_begin, | ||||||||
5950 | qual_end, | ||||||||
5951 | getNumProtocols, | ||||||||
5952 | getProtocol | ||||||||
5953 | }; | ||||||||
5954 | }; | ||||||||
5955 | |||||||||
5956 | inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { | ||||||||
5957 | QualType baseType = getBaseType(); | ||||||||
5958 | while (const auto *ObjT = baseType->getAs<ObjCObjectType>()) { | ||||||||
5959 | if (const auto *T = dyn_cast<ObjCInterfaceType>(ObjT)) | ||||||||
5960 | return T->getDecl(); | ||||||||
5961 | |||||||||
5962 | baseType = ObjT->getBaseType(); | ||||||||
5963 | } | ||||||||
5964 | |||||||||
5965 | return nullptr; | ||||||||
5966 | } | ||||||||
5967 | |||||||||
5968 | /// Represents a pointer to an Objective C object. | ||||||||
5969 | /// | ||||||||
5970 | /// These are constructed from pointer declarators when the pointee type is | ||||||||
5971 | /// an ObjCObjectType (or sugar for one). In addition, the 'id' and 'Class' | ||||||||
5972 | /// types are typedefs for these, and the protocol-qualified types 'id<P>' | ||||||||
5973 | /// and 'Class<P>' are translated into these. | ||||||||
5974 | /// | ||||||||
5975 | /// Pointers to pointers to Objective C objects are still PointerTypes; | ||||||||
5976 | /// only the first level of pointer gets it own type implementation. | ||||||||
5977 | class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { | ||||||||
5978 | friend class ASTContext; // ASTContext creates these. | ||||||||
5979 | |||||||||
5980 | QualType PointeeType; | ||||||||
5981 | |||||||||
5982 | ObjCObjectPointerType(QualType Canonical, QualType Pointee) | ||||||||
5983 | : Type(ObjCObjectPointer, Canonical, | ||||||||
5984 | Pointee->isDependentType(), | ||||||||
5985 | Pointee->isInstantiationDependentType(), | ||||||||
5986 | Pointee->isVariablyModifiedType(), | ||||||||
5987 | Pointee->containsUnexpandedParameterPack()), | ||||||||
5988 | PointeeType(Pointee) {} | ||||||||
5989 | |||||||||
5990 | public: | ||||||||
5991 | /// Gets the type pointed to by this ObjC pointer. | ||||||||
5992 | /// The result will always be an ObjCObjectType or sugar thereof. | ||||||||
5993 | QualType getPointeeType() const { return PointeeType; } | ||||||||
5994 | |||||||||
5995 | /// Gets the type pointed to by this ObjC pointer. Always returns non-null. | ||||||||
5996 | /// | ||||||||
5997 | /// This method is equivalent to getPointeeType() except that | ||||||||
5998 | /// it discards any typedefs (or other sugar) between this | ||||||||
5999 | /// type and the "outermost" object type. So for: | ||||||||
6000 | /// \code | ||||||||
6001 | /// \@class A; \@protocol P; \@protocol Q; | ||||||||
6002 | /// typedef A<P> AP; | ||||||||
6003 | /// typedef A A1; | ||||||||
6004 | /// typedef A1<P> A1P; | ||||||||
6005 | /// typedef A1P<Q> A1PQ; | ||||||||
6006 | /// \endcode | ||||||||
6007 | /// For 'A*', getObjectType() will return 'A'. | ||||||||
6008 | /// For 'A<P>*', getObjectType() will return 'A<P>'. | ||||||||
6009 | /// For 'AP*', getObjectType() will return 'A<P>'. | ||||||||
6010 | /// For 'A1*', getObjectType() will return 'A'. | ||||||||
6011 | /// For 'A1<P>*', getObjectType() will return 'A1<P>'. | ||||||||
6012 | /// For 'A1P*', getObjectType() will return 'A1<P>'. | ||||||||
6013 | /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because | ||||||||
6014 | /// adding protocols to a protocol-qualified base discards the | ||||||||
6015 | /// old qualifiers (for now). But if it didn't, getObjectType() | ||||||||
6016 | /// would return 'A1P<Q>' (and we'd have to make iterating over | ||||||||
6017 | /// qualifiers more complicated). | ||||||||
6018 | const ObjCObjectType *getObjectType() const { | ||||||||
6019 | return PointeeType->castAs<ObjCObjectType>(); | ||||||||
6020 | } | ||||||||
6021 | |||||||||
6022 | /// If this pointer points to an Objective C | ||||||||
6023 | /// \@interface type, gets the type for that interface. Any protocol | ||||||||
6024 | /// qualifiers on the interface are ignored. | ||||||||
6025 | /// | ||||||||
6026 | /// \return null if the base type for this pointer is 'id' or 'Class' | ||||||||
6027 | const ObjCInterfaceType *getInterfaceType() const; | ||||||||
6028 | |||||||||
6029 | /// If this pointer points to an Objective \@interface | ||||||||
6030 | /// type, gets the declaration for that interface. | ||||||||
6031 | /// | ||||||||
6032 | /// \return null if the base type for this pointer is 'id' or 'Class' | ||||||||
6033 | ObjCInterfaceDecl *getInterfaceDecl() const { | ||||||||
6034 | return getObjectType()->getInterface(); | ||||||||
6035 | } | ||||||||
6036 | |||||||||
6037 | /// True if this is equivalent to the 'id' type, i.e. if | ||||||||
6038 | /// its object type is the primitive 'id' type with no protocols. | ||||||||
6039 | bool isObjCIdType() const { | ||||||||
6040 | return getObjectType()->isObjCUnqualifiedId(); | ||||||||
6041 | } | ||||||||
6042 | |||||||||
6043 | /// True if this is equivalent to the 'Class' type, | ||||||||
6044 | /// i.e. if its object tive is the primitive 'Class' type with no protocols. | ||||||||
6045 | bool isObjCClassType() const { | ||||||||
6046 | return getObjectType()->isObjCUnqualifiedClass(); | ||||||||
6047 | } | ||||||||
6048 | |||||||||
6049 | /// True if this is equivalent to the 'id' or 'Class' type, | ||||||||
6050 | bool isObjCIdOrClassType() const { | ||||||||
6051 | return getObjectType()->isObjCUnqualifiedIdOrClass(); | ||||||||
6052 | } | ||||||||
6053 | |||||||||
6054 | /// True if this is equivalent to 'id<P>' for some non-empty set of | ||||||||
6055 | /// protocols. | ||||||||
6056 | bool isObjCQualifiedIdType() const { | ||||||||
6057 | return getObjectType()->isObjCQualifiedId(); | ||||||||
6058 | } | ||||||||
6059 | |||||||||
6060 | /// True if this is equivalent to 'Class<P>' for some non-empty set of | ||||||||
6061 | /// protocols. | ||||||||
6062 | bool isObjCQualifiedClassType() const { | ||||||||
6063 | return getObjectType()->isObjCQualifiedClass(); | ||||||||
6064 | } | ||||||||
6065 | |||||||||
6066 | /// Whether this is a "__kindof" type. | ||||||||
6067 | bool isKindOfType() const { return getObjectType()->isKindOfType(); } | ||||||||
6068 | |||||||||
6069 | /// Whether this type is specialized, meaning that it has type arguments. | ||||||||
6070 | bool isSpecialized() const { return getObjectType()->isSpecialized(); } | ||||||||
6071 | |||||||||
6072 | /// Whether this type is specialized, meaning that it has type arguments. | ||||||||
6073 | bool isSpecializedAsWritten() const { | ||||||||
6074 | return getObjectType()->isSpecializedAsWritten(); | ||||||||
6075 | } | ||||||||
6076 | |||||||||
6077 | /// Whether this type is unspecialized, meaning that is has no type arguments. | ||||||||
6078 | bool isUnspecialized() const { return getObjectType()->isUnspecialized(); } | ||||||||
6079 | |||||||||
6080 | /// Determine whether this object type is "unspecialized" as | ||||||||
6081 | /// written, meaning that it has no type arguments. | ||||||||
6082 | bool isUnspecializedAsWritten() const { return !isSpecializedAsWritten(); } | ||||||||
6083 | |||||||||
6084 | /// Retrieve the type arguments for this type. | ||||||||
6085 | ArrayRef<QualType> getTypeArgs() const { | ||||||||
6086 | return getObjectType()->getTypeArgs(); | ||||||||
6087 | } | ||||||||
6088 | |||||||||
6089 | /// Retrieve the type arguments for this type. | ||||||||
6090 | ArrayRef<QualType> getTypeArgsAsWritten() const { | ||||||||
6091 | return getObjectType()->getTypeArgsAsWritten(); | ||||||||
6092 | } | ||||||||
6093 | |||||||||
6094 | /// An iterator over the qualifiers on the object type. Provided | ||||||||
6095 | /// for convenience. This will always iterate over the full set of | ||||||||
6096 | /// protocols on a type, not just those provided directly. | ||||||||
6097 | using qual_iterator = ObjCObjectType::qual_iterator; | ||||||||
6098 | using qual_range = llvm::iterator_range<qual_iterator>; | ||||||||
6099 | |||||||||
6100 | qual_range quals() const { return qual_range(qual_begin(), qual_end()); } | ||||||||
6101 | |||||||||
6102 | qual_iterator qual_begin() const { | ||||||||
6103 | return getObjectType()->qual_begin(); | ||||||||
6104 | } | ||||||||
6105 | |||||||||
6106 | qual_iterator qual_end() const { | ||||||||
6107 | return getObjectType()->qual_end(); | ||||||||
6108 | } | ||||||||
6109 | |||||||||
6110 | bool qual_empty() const { return getObjectType()->qual_empty(); } | ||||||||
6111 | |||||||||
6112 | /// Return the number of qualifying protocols on the object type. | ||||||||
6113 | unsigned getNumProtocols() const { | ||||||||
6114 | return getObjectType()->getNumProtocols(); | ||||||||
6115 | } | ||||||||
6116 | |||||||||
6117 | /// Retrieve a qualifying protocol by index on the object type. | ||||||||
6118 | ObjCProtocolDecl *getProtocol(unsigned I) const { | ||||||||
6119 | return getObjectType()->getProtocol(I); | ||||||||
6120 | } | ||||||||
6121 | |||||||||
6122 | bool isSugared() const { return false; } | ||||||||
6123 | QualType desugar() const { return QualType(this, 0); } | ||||||||
6124 | |||||||||
6125 | /// Retrieve the type of the superclass of this object pointer type. | ||||||||
6126 | /// | ||||||||
6127 | /// This operation substitutes any type arguments into the | ||||||||
6128 | /// superclass of the current class type, potentially producing a | ||||||||
6129 | /// pointer to a specialization of the superclass type. Produces a | ||||||||
6130 | /// null type if there is no superclass. | ||||||||
6131 | QualType getSuperClassType() const; | ||||||||
6132 | |||||||||
6133 | /// Strip off the Objective-C "kindof" type and (with it) any | ||||||||
6134 | /// protocol qualifiers. | ||||||||
6135 | const ObjCObjectPointerType *stripObjCKindOfTypeAndQuals( | ||||||||
6136 | const ASTContext &ctx) const; | ||||||||
6137 | |||||||||
6138 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||||
6139 | Profile(ID, getPointeeType()); | ||||||||
6140 | } | ||||||||
6141 | |||||||||
6142 | static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { | ||||||||
6143 | ID.AddPointer(T.getAsOpaquePtr()); | ||||||||
6144 | } | ||||||||
6145 | |||||||||
6146 | static bool classof(const Type *T) { | ||||||||
6147 | return T->getTypeClass() == ObjCObjectPointer; | ||||||||
6148 | } | ||||||||
6149 | }; | ||||||||
6150 | |||||||||
6151 | class AtomicType : public Type, public llvm::FoldingSetNode { | ||||||||
6152 | friend class ASTContext; // ASTContext creates these. | ||||||||
6153 | |||||||||
6154 | QualType ValueType; | ||||||||
6155 | |||||||||
6156 | AtomicType(QualType ValTy, QualType Canonical) | ||||||||
6157 | : Type(Atomic, Canonical, ValTy->isDependentType(), | ||||||||
6158 | ValTy->isInstantiationDependentType(), | ||||||||
6159 | ValTy->isVariablyModifiedType(), | ||||||||
6160 | ValTy->containsUnexpandedParameterPack()), | ||||||||
6161 | ValueType(ValTy) {} | ||||||||
6162 | |||||||||
6163 | public: | ||||||||
6164 | /// Gets the type contained by this atomic type, i.e. | ||||||||
6165 | /// the type returned by performing an atomic load of this atomic type. | ||||||||
6166 | QualType getValueType() const { return ValueType; } | ||||||||
6167 | |||||||||
6168 | bool isSugared() const { return false; } | ||||||||
6169 | QualType desugar() const { return QualType(this, 0); } | ||||||||
6170 | |||||||||
6171 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||||
6172 | Profile(ID, getValueType()); | ||||||||
6173 | } | ||||||||
6174 | |||||||||
6175 | static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { | ||||||||
6176 | ID.AddPointer(T.getAsOpaquePtr()); | ||||||||
6177 | } | ||||||||
6178 | |||||||||
6179 | static bool classof(const Type *T) { | ||||||||
6180 | return T->getTypeClass() == Atomic; | ||||||||
6181 | } | ||||||||
6182 | }; | ||||||||
6183 | |||||||||
6184 | /// PipeType - OpenCL20. | ||||||||
6185 | class PipeType : public Type, public llvm::FoldingSetNode { | ||||||||
6186 | friend class ASTContext; // ASTContext creates these. | ||||||||
6187 | |||||||||
6188 | QualType ElementType; | ||||||||
6189 | bool isRead; | ||||||||
6190 | |||||||||
6191 | PipeType(QualType elemType, QualType CanonicalPtr, bool isRead) | ||||||||
6192 | : Type(Pipe, CanonicalPtr, elemType->isDependentType(), | ||||||||
6193 | elemType->isInstantiationDependentType(), | ||||||||
6194 | elemType->isVariablyModifiedType(), | ||||||||
6195 | elemType->containsUnexpandedParameterPack()), | ||||||||
6196 | ElementType(elemType), isRead(isRead) {} | ||||||||
6197 | |||||||||
6198 | public: | ||||||||
6199 | QualType getElementType() const { return ElementType; } | ||||||||
6200 | |||||||||
6201 | bool isSugared() const { return false; } | ||||||||
6202 | |||||||||
6203 | QualType desugar() const { return QualType(this, 0); } | ||||||||
6204 | |||||||||
6205 | void Profile(llvm::FoldingSetNodeID &ID) { | ||||||||
6206 | Profile(ID, getElementType(), isReadOnly()); | ||||||||
6207 | } | ||||||||
6208 | |||||||||
6209 | static void Profile(llvm::FoldingSetNodeID &ID, QualType T, bool isRead) { | ||||||||
6210 | ID.AddPointer(T.getAsOpaquePtr()); | ||||||||
6211 | ID.AddBoolean(isRead); | ||||||||
6212 | } | ||||||||
6213 | |||||||||
6214 | static bool classof(const Type *T) { | ||||||||
6215 | return T->getTypeClass() == Pipe; | ||||||||
6216 | } | ||||||||
6217 | |||||||||
6218 | bool isReadOnly() const { return isRead; } | ||||||||
6219 | }; | ||||||||
6220 | |||||||||
6221 | /// A qualifier set is used to build a set of qualifiers. | ||||||||
6222 | class QualifierCollector : public Qualifiers { | ||||||||
6223 | public: | ||||||||
6224 | QualifierCollector(Qualifiers Qs = Qualifiers()) : Qualifiers(Qs) {} | ||||||||
6225 | |||||||||
6226 | /// Collect any qualifiers on the given type and return an | ||||||||
6227 | /// unqualified type. The qualifiers are assumed to be consistent | ||||||||
6228 | /// with those already in the type. | ||||||||
6229 | const Type *strip(QualType type) { | ||||||||
6230 | addFastQualifiers(type.getLocalFastQualifiers()); | ||||||||
6231 | if (!type.hasLocalNonFastQualifiers()) | ||||||||
6232 | return type.getTypePtrUnsafe(); | ||||||||
6233 | |||||||||
6234 | const ExtQuals *extQuals = type.getExtQualsUnsafe(); | ||||||||
6235 | addConsistentQualifiers(extQuals->getQualifiers()); | ||||||||
6236 | return extQuals->getBaseType(); | ||||||||
6237 | } | ||||||||
6238 | |||||||||
6239 | /// Apply the collected qualifiers to the given type. | ||||||||
6240 | QualType apply(const ASTContext &Context, QualType QT) const; | ||||||||
6241 | |||||||||
6242 | /// Apply the collected qualifiers to the given type. | ||||||||
6243 | QualType apply(const ASTContext &Context, const Type* T) const; | ||||||||
6244 | }; | ||||||||
6245 | |||||||||
6246 | /// A container of type source information. | ||||||||
6247 | /// | ||||||||
6248 | /// A client can read the relevant info using TypeLoc wrappers, e.g: | ||||||||
6249 | /// @code | ||||||||
6250 | /// TypeLoc TL = TypeSourceInfo->getTypeLoc(); | ||||||||
6251 | /// TL.getBeginLoc().print(OS, SrcMgr); | ||||||||
6252 | /// @endcode | ||||||||
6253 | class alignas(8) TypeSourceInfo { | ||||||||
6254 | // Contains a memory block after the class, used for type source information, | ||||||||
6255 | // allocated by ASTContext. | ||||||||
6256 | friend class ASTContext; | ||||||||
6257 | |||||||||
6258 | QualType Ty; | ||||||||
6259 | |||||||||
6260 | TypeSourceInfo(QualType ty) : Ty(ty) {} | ||||||||
6261 | |||||||||
6262 | public: | ||||||||
6263 | /// Return the type wrapped by this type source info. | ||||||||
6264 | QualType getType() const { return Ty; } | ||||||||
6265 | |||||||||
6266 | /// Return the TypeLoc wrapper for the type source info. | ||||||||
6267 | TypeLoc getTypeLoc() const; // implemented in TypeLoc.h | ||||||||
6268 | |||||||||
6269 | /// Override the type stored in this TypeSourceInfo. Use with caution! | ||||||||
6270 | void overrideType(QualType T) { Ty = T; } | ||||||||
6271 | }; | ||||||||
6272 | |||||||||
6273 | // Inline function definitions. | ||||||||
6274 | |||||||||
6275 | inline SplitQualType SplitQualType::getSingleStepDesugaredType() const { | ||||||||
6276 | SplitQualType desugar = | ||||||||
6277 | Ty->getLocallyUnqualifiedSingleStepDesugaredType().split(); | ||||||||
6278 | desugar.Quals.addConsistentQualifiers(Quals); | ||||||||
6279 | return desugar; | ||||||||
6280 | } | ||||||||
6281 | |||||||||
6282 | inline const Type *QualType::getTypePtr() const { | ||||||||
6283 | return getCommonPtr()->BaseType; | ||||||||
6284 | } | ||||||||
6285 | |||||||||
6286 | inline const Type *QualType::getTypePtrOrNull() const { | ||||||||
6287 | return (isNull() ? nullptr : getCommonPtr()->BaseType); | ||||||||
6288 | } | ||||||||
6289 | |||||||||
6290 | inline SplitQualType QualType::split() const { | ||||||||
6291 | if (!hasLocalNonFastQualifiers()) | ||||||||
6292 | return SplitQualType(getTypePtrUnsafe(), | ||||||||
6293 | Qualifiers::fromFastMask(getLocalFastQualifiers())); | ||||||||
6294 | |||||||||
6295 | const ExtQuals *eq = getExtQualsUnsafe(); | ||||||||
6296 | Qualifiers qs = eq->getQualifiers(); | ||||||||
6297 | qs.addFastQualifiers(getLocalFastQualifiers()); | ||||||||
6298 | return SplitQualType(eq->getBaseType(), qs); | ||||||||
6299 | } | ||||||||
6300 | |||||||||
6301 | inline Qualifiers QualType::getLocalQualifiers() const { | ||||||||
6302 | Qualifiers Quals; | ||||||||
6303 | if (hasLocalNonFastQualifiers()) | ||||||||
6304 | Quals = getExtQualsUnsafe()->getQualifiers(); | ||||||||
6305 | Quals.addFastQualifiers(getLocalFastQualifiers()); | ||||||||
6306 | return Quals; | ||||||||
6307 | } | ||||||||
6308 | |||||||||
6309 | inline Qualifiers QualType::getQualifiers() const { | ||||||||
6310 | Qualifiers quals = getCommonPtr()->CanonicalType.getLocalQualifiers(); | ||||||||
6311 | quals.addFastQualifiers(getLocalFastQualifiers()); | ||||||||
6312 | return quals; | ||||||||
6313 | } | ||||||||
6314 | |||||||||
6315 | inline unsigned QualType::getCVRQualifiers() const { | ||||||||
6316 | unsigned cvr = getCommonPtr()->CanonicalType.getLocalCVRQualifiers(); | ||||||||
6317 | cvr |= getLocalCVRQualifiers(); | ||||||||
6318 | return cvr; | ||||||||
6319 | } | ||||||||
6320 | |||||||||
6321 | inline QualType QualType::getCanonicalType() const { | ||||||||
6322 | QualType canon = getCommonPtr()->CanonicalType; | ||||||||
6323 | return canon.withFastQualifiers(getLocalFastQualifiers()); | ||||||||
6324 | } | ||||||||
6325 | |||||||||
6326 | inline bool QualType::isCanonical() const { | ||||||||
6327 | return getTypePtr()->isCanonicalUnqualified(); | ||||||||
6328 | } | ||||||||
6329 | |||||||||
6330 | inline bool QualType::isCanonicalAsParam() const { | ||||||||
6331 | if (!isCanonical()) return false; | ||||||||
6332 | if (hasLocalQualifiers()) return false; | ||||||||
6333 | |||||||||
6334 | const Type *T = getTypePtr(); | ||||||||
6335 | if (T->isVariablyModifiedType() && T->hasSizedVLAType()) | ||||||||
6336 | return false; | ||||||||
6337 | |||||||||
6338 | return !isa<FunctionType>(T) && !isa<ArrayType>(T); | ||||||||
6339 | } | ||||||||
6340 | |||||||||
6341 | inline bool QualType::isConstQualified() const { | ||||||||
6342 | return isLocalConstQualified() || | ||||||||
6343 | getCommonPtr()->CanonicalType.isLocalConstQualified(); | ||||||||
6344 | } | ||||||||
6345 | |||||||||
6346 | inline bool QualType::isRestrictQualified() const { | ||||||||
6347 | return isLocalRestrictQualified() || | ||||||||
6348 | getCommonPtr()->CanonicalType.isLocalRestrictQualified(); | ||||||||
6349 | } | ||||||||
6350 | |||||||||
6351 | |||||||||
6352 | inline bool QualType::isVolatileQualified() const { | ||||||||
6353 | return isLocalVolatileQualified() || | ||||||||
6354 | getCommonPtr()->CanonicalType.isLocalVolatileQualified(); | ||||||||
6355 | } | ||||||||
6356 | |||||||||
6357 | inline bool QualType::hasQualifiers() const { | ||||||||
6358 | return hasLocalQualifiers() || | ||||||||
6359 | getCommonPtr()->CanonicalType.hasLocalQualifiers(); | ||||||||
6360 | } | ||||||||
6361 | |||||||||
6362 | inline QualType QualType::getUnqualifiedType() const { | ||||||||
6363 | if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) | ||||||||
6364 | return QualType(getTypePtr(), 0); | ||||||||
6365 | |||||||||
6366 | return QualType(getSplitUnqualifiedTypeImpl(*this).Ty, 0); | ||||||||
6367 | } | ||||||||
6368 | |||||||||
6369 | inline SplitQualType QualType::getSplitUnqualifiedType() const { | ||||||||
6370 | if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) | ||||||||
6371 | return split(); | ||||||||
6372 | |||||||||
6373 | return getSplitUnqualifiedTypeImpl(*this); | ||||||||
6374 | } | ||||||||
6375 | |||||||||
6376 | inline void QualType::removeLocalConst() { | ||||||||
6377 | removeLocalFastQualifiers(Qualifiers::Const); | ||||||||
6378 | } | ||||||||
6379 | |||||||||
6380 | inline void QualType::removeLocalRestrict() { | ||||||||
6381 | removeLocalFastQualifiers(Qualifiers::Restrict); | ||||||||
6382 | } | ||||||||
6383 | |||||||||
6384 | inline void QualType::removeLocalVolatile() { | ||||||||
6385 | removeLocalFastQualifiers(Qualifiers::Volatile); | ||||||||
6386 | } | ||||||||
6387 | |||||||||
6388 | inline void QualType::removeLocalCVRQualifiers(unsigned Mask) { | ||||||||
6389 | assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits")((!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits" ) ? static_cast<void> (0) : __assert_fail ("!(Mask & ~Qualifiers::CVRMask) && \"mask has non-CVR bits\"" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 6389, __PRETTY_FUNCTION__)); | ||||||||
6390 | static_assert((int)Qualifiers::CVRMask == (int)Qualifiers::FastMask, | ||||||||
6391 | "Fast bits differ from CVR bits!"); | ||||||||
6392 | |||||||||
6393 | // Fast path: we don't need to touch the slow qualifiers. | ||||||||
6394 | removeLocalFastQualifiers(Mask); | ||||||||
6395 | } | ||||||||
6396 | |||||||||
6397 | /// Check if this type has any address space qualifier. | ||||||||
6398 | inline bool QualType::hasAddressSpace() const { | ||||||||
6399 | return getQualifiers().hasAddressSpace(); | ||||||||
6400 | } | ||||||||
6401 | |||||||||
6402 | /// Return the address space of this type. | ||||||||
6403 | inline LangAS QualType::getAddressSpace() const { | ||||||||
6404 | return getQualifiers().getAddressSpace(); | ||||||||
6405 | } | ||||||||
6406 | |||||||||
6407 | /// Return the gc attribute of this type. | ||||||||
6408 | inline Qualifiers::GC QualType::getObjCGCAttr() const { | ||||||||
6409 | return getQualifiers().getObjCGCAttr(); | ||||||||
6410 | } | ||||||||
6411 | |||||||||
6412 | inline bool QualType::hasNonTrivialToPrimitiveDefaultInitializeCUnion() const { | ||||||||
6413 | if (auto *RD = getTypePtr()->getBaseElementTypeUnsafe()->getAsRecordDecl()) | ||||||||
6414 | return hasNonTrivialToPrimitiveDefaultInitializeCUnion(RD); | ||||||||
6415 | return false; | ||||||||
6416 | } | ||||||||
6417 | |||||||||
6418 | inline bool QualType::hasNonTrivialToPrimitiveDestructCUnion() const { | ||||||||
6419 | if (auto *RD = getTypePtr()->getBaseElementTypeUnsafe()->getAsRecordDecl()) | ||||||||
6420 | return hasNonTrivialToPrimitiveDestructCUnion(RD); | ||||||||
6421 | return false; | ||||||||
6422 | } | ||||||||
6423 | |||||||||
6424 | inline bool QualType::hasNonTrivialToPrimitiveCopyCUnion() const { | ||||||||
6425 | if (auto *RD = getTypePtr()->getBaseElementTypeUnsafe()->getAsRecordDecl()) | ||||||||
6426 | return hasNonTrivialToPrimitiveCopyCUnion(RD); | ||||||||
6427 | return false; | ||||||||
6428 | } | ||||||||
6429 | |||||||||
6430 | inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { | ||||||||
6431 | if (const auto *PT = t.getAs<PointerType>()) { | ||||||||
6432 | if (const auto *FT = PT->getPointeeType()->getAs<FunctionType>()) | ||||||||
6433 | return FT->getExtInfo(); | ||||||||
6434 | } else if (const auto *FT = t.getAs<FunctionType>()) | ||||||||
6435 | return FT->getExtInfo(); | ||||||||
6436 | |||||||||
6437 | return FunctionType::ExtInfo(); | ||||||||
6438 | } | ||||||||
6439 | |||||||||
6440 | inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { | ||||||||
6441 | return getFunctionExtInfo(*t); | ||||||||
6442 | } | ||||||||
6443 | |||||||||
6444 | /// Determine whether this type is more | ||||||||
6445 | /// qualified than the Other type. For example, "const volatile int" | ||||||||
6446 | /// is more qualified than "const int", "volatile int", and | ||||||||
6447 | /// "int". However, it is not more qualified than "const volatile | ||||||||
6448 | /// int". | ||||||||
6449 | inline bool QualType::isMoreQualifiedThan(QualType other) const { | ||||||||
6450 | Qualifiers MyQuals = getQualifiers(); | ||||||||
6451 | Qualifiers OtherQuals = other.getQualifiers(); | ||||||||
6452 | return (MyQuals != OtherQuals && MyQuals.compatiblyIncludes(OtherQuals)); | ||||||||
6453 | } | ||||||||
6454 | |||||||||
6455 | /// Determine whether this type is at last | ||||||||
6456 | /// as qualified as the Other type. For example, "const volatile | ||||||||
6457 | /// int" is at least as qualified as "const int", "volatile int", | ||||||||
6458 | /// "int", and "const volatile int". | ||||||||
6459 | inline bool QualType::isAtLeastAsQualifiedAs(QualType other) const { | ||||||||
6460 | Qualifiers OtherQuals = other.getQualifiers(); | ||||||||
6461 | |||||||||
6462 | // Ignore __unaligned qualifier if this type is a void. | ||||||||
6463 | if (getUnqualifiedType()->isVoidType()) | ||||||||
6464 | OtherQuals.removeUnaligned(); | ||||||||
6465 | |||||||||
6466 | return getQualifiers().compatiblyIncludes(OtherQuals); | ||||||||
6467 | } | ||||||||
6468 | |||||||||
6469 | /// If Type is a reference type (e.g., const | ||||||||
6470 | /// int&), returns the type that the reference refers to ("const | ||||||||
6471 | /// int"). Otherwise, returns the type itself. This routine is used | ||||||||
6472 | /// throughout Sema to implement C++ 5p6: | ||||||||
6473 | /// | ||||||||
6474 | /// If an expression initially has the type "reference to T" (8.3.2, | ||||||||
6475 | /// 8.5.3), the type is adjusted to "T" prior to any further | ||||||||
6476 | /// analysis, the expression designates the object or function | ||||||||
6477 | /// denoted by the reference, and the expression is an lvalue. | ||||||||
6478 | inline QualType QualType::getNonReferenceType() const { | ||||||||
6479 | if (const auto *RefType = (*this)->getAs<ReferenceType>()) | ||||||||
6480 | return RefType->getPointeeType(); | ||||||||
6481 | else | ||||||||
6482 | return *this; | ||||||||
6483 | } | ||||||||
6484 | |||||||||
6485 | inline bool QualType::isCForbiddenLValueType() const { | ||||||||
6486 | return ((getTypePtr()->isVoidType() && !hasQualifiers()) || | ||||||||
6487 | getTypePtr()->isFunctionType()); | ||||||||
6488 | } | ||||||||
6489 | |||||||||
6490 | /// Tests whether the type is categorized as a fundamental type. | ||||||||
6491 | /// | ||||||||
6492 | /// \returns True for types specified in C++0x [basic.fundamental]. | ||||||||
6493 | inline bool Type::isFundamentalType() const { | ||||||||
6494 | return isVoidType() || | ||||||||
6495 | isNullPtrType() || | ||||||||
6496 | // FIXME: It's really annoying that we don't have an | ||||||||
6497 | // 'isArithmeticType()' which agrees with the standard definition. | ||||||||
6498 | (isArithmeticType() && !isEnumeralType()); | ||||||||
6499 | } | ||||||||
6500 | |||||||||
6501 | /// Tests whether the type is categorized as a compound type. | ||||||||
6502 | /// | ||||||||
6503 | /// \returns True for types specified in C++0x [basic.compound]. | ||||||||
6504 | inline bool Type::isCompoundType() const { | ||||||||
6505 | // C++0x [basic.compound]p1: | ||||||||
6506 | // Compound types can be constructed in the following ways: | ||||||||
6507 | // -- arrays of objects of a given type [...]; | ||||||||
6508 | return isArrayType() || | ||||||||
6509 | // -- functions, which have parameters of given types [...]; | ||||||||
6510 | isFunctionType() || | ||||||||
6511 | // -- pointers to void or objects or functions [...]; | ||||||||
6512 | isPointerType() || | ||||||||
6513 | // -- references to objects or functions of a given type. [...] | ||||||||
6514 | isReferenceType() || | ||||||||
6515 | // -- classes containing a sequence of objects of various types, [...]; | ||||||||
6516 | isRecordType() || | ||||||||
6517 | // -- unions, which are classes capable of containing objects of different | ||||||||
6518 | // types at different times; | ||||||||
6519 | isUnionType() || | ||||||||
6520 | // -- enumerations, which comprise a set of named constant values. [...]; | ||||||||
6521 | isEnumeralType() || | ||||||||
6522 | // -- pointers to non-static class members, [...]. | ||||||||
6523 | isMemberPointerType(); | ||||||||
6524 | } | ||||||||
6525 | |||||||||
6526 | inline bool Type::isFunctionType() const { | ||||||||
6527 | return isa<FunctionType>(CanonicalType); | ||||||||
6528 | } | ||||||||
6529 | |||||||||
6530 | inline bool Type::isPointerType() const { | ||||||||
6531 | return isa<PointerType>(CanonicalType); | ||||||||
6532 | } | ||||||||
6533 | |||||||||
6534 | inline bool Type::isAnyPointerType() const { | ||||||||
6535 | return isPointerType() || isObjCObjectPointerType(); | ||||||||
6536 | } | ||||||||
6537 | |||||||||
6538 | inline bool Type::isBlockPointerType() const { | ||||||||
6539 | return isa<BlockPointerType>(CanonicalType); | ||||||||
6540 | } | ||||||||
6541 | |||||||||
6542 | inline bool Type::isReferenceType() const { | ||||||||
6543 | return isa<ReferenceType>(CanonicalType); | ||||||||
6544 | } | ||||||||
6545 | |||||||||
6546 | inline bool Type::isLValueReferenceType() const { | ||||||||
6547 | return isa<LValueReferenceType>(CanonicalType); | ||||||||
6548 | } | ||||||||
6549 | |||||||||
6550 | inline bool Type::isRValueReferenceType() const { | ||||||||
6551 | return isa<RValueReferenceType>(CanonicalType); | ||||||||
6552 | } | ||||||||
6553 | |||||||||
6554 | inline bool Type::isObjectPointerType() const { | ||||||||
6555 | // Note: an "object pointer type" is not the same thing as a pointer to an | ||||||||
6556 | // object type; rather, it is a pointer to an object type or a pointer to cv | ||||||||
6557 | // void. | ||||||||
6558 | if (const auto *T = getAs<PointerType>()) | ||||||||
6559 | return !T->getPointeeType()->isFunctionType(); | ||||||||
6560 | else | ||||||||
6561 | return false; | ||||||||
6562 | } | ||||||||
6563 | |||||||||
6564 | inline bool Type::isFunctionPointerType() const { | ||||||||
6565 | if (const auto *T = getAs<PointerType>()) | ||||||||
6566 | return T->getPointeeType()->isFunctionType(); | ||||||||
6567 | else | ||||||||
6568 | return false; | ||||||||
6569 | } | ||||||||
6570 | |||||||||
6571 | inline bool Type::isFunctionReferenceType() const { | ||||||||
6572 | if (const auto *T = getAs<ReferenceType>()) | ||||||||
6573 | return T->getPointeeType()->isFunctionType(); | ||||||||
6574 | else | ||||||||
6575 | return false; | ||||||||
6576 | } | ||||||||
6577 | |||||||||
6578 | inline bool Type::isMemberPointerType() const { | ||||||||
6579 | return isa<MemberPointerType>(CanonicalType); | ||||||||
6580 | } | ||||||||
6581 | |||||||||
6582 | inline bool Type::isMemberFunctionPointerType() const { | ||||||||
6583 | if (const auto *T = getAs<MemberPointerType>()) | ||||||||
6584 | return T->isMemberFunctionPointer(); | ||||||||
6585 | else | ||||||||
6586 | return false; | ||||||||
6587 | } | ||||||||
6588 | |||||||||
6589 | inline bool Type::isMemberDataPointerType() const { | ||||||||
6590 | if (const auto *T = getAs<MemberPointerType>()) | ||||||||
6591 | return T->isMemberDataPointer(); | ||||||||
6592 | else | ||||||||
6593 | return false; | ||||||||
6594 | } | ||||||||
6595 | |||||||||
6596 | inline bool Type::isArrayType() const { | ||||||||
6597 | return isa<ArrayType>(CanonicalType); | ||||||||
6598 | } | ||||||||
6599 | |||||||||
6600 | inline bool Type::isConstantArrayType() const { | ||||||||
6601 | return isa<ConstantArrayType>(CanonicalType); | ||||||||
6602 | } | ||||||||
6603 | |||||||||
6604 | inline bool Type::isIncompleteArrayType() const { | ||||||||
6605 | return isa<IncompleteArrayType>(CanonicalType); | ||||||||
6606 | } | ||||||||
6607 | |||||||||
6608 | inline bool Type::isVariableArrayType() const { | ||||||||
6609 | return isa<VariableArrayType>(CanonicalType); | ||||||||
6610 | } | ||||||||
6611 | |||||||||
6612 | inline bool Type::isDependentSizedArrayType() const { | ||||||||
6613 | return isa<DependentSizedArrayType>(CanonicalType); | ||||||||
6614 | } | ||||||||
6615 | |||||||||
6616 | inline bool Type::isBuiltinType() const { | ||||||||
6617 | return isa<BuiltinType>(CanonicalType); | ||||||||
6618 | } | ||||||||
6619 | |||||||||
6620 | inline bool Type::isRecordType() const { | ||||||||
6621 | return isa<RecordType>(CanonicalType); | ||||||||
6622 | } | ||||||||
6623 | |||||||||
6624 | inline bool Type::isEnumeralType() const { | ||||||||
6625 | return isa<EnumType>(CanonicalType); | ||||||||
6626 | } | ||||||||
6627 | |||||||||
6628 | inline bool Type::isAnyComplexType() const { | ||||||||
6629 | return isa<ComplexType>(CanonicalType); | ||||||||
6630 | } | ||||||||
6631 | |||||||||
6632 | inline bool Type::isVectorType() const { | ||||||||
6633 | return isa<VectorType>(CanonicalType); | ||||||||
6634 | } | ||||||||
6635 | |||||||||
6636 | inline bool Type::isExtVectorType() const { | ||||||||
6637 | return isa<ExtVectorType>(CanonicalType); | ||||||||
6638 | } | ||||||||
6639 | |||||||||
6640 | inline bool Type::isDependentAddressSpaceType() const { | ||||||||
6641 | return isa<DependentAddressSpaceType>(CanonicalType); | ||||||||
6642 | } | ||||||||
6643 | |||||||||
6644 | inline bool Type::isObjCObjectPointerType() const { | ||||||||
6645 | return isa<ObjCObjectPointerType>(CanonicalType); | ||||||||
6646 | } | ||||||||
6647 | |||||||||
6648 | inline bool Type::isObjCObjectType() const { | ||||||||
6649 | return isa<ObjCObjectType>(CanonicalType); | ||||||||
6650 | } | ||||||||
6651 | |||||||||
6652 | inline bool Type::isObjCObjectOrInterfaceType() const { | ||||||||
6653 | return isa<ObjCInterfaceType>(CanonicalType) || | ||||||||
6654 | isa<ObjCObjectType>(CanonicalType); | ||||||||
6655 | } | ||||||||
6656 | |||||||||
6657 | inline bool Type::isAtomicType() const { | ||||||||
6658 | return isa<AtomicType>(CanonicalType); | ||||||||
6659 | } | ||||||||
6660 | |||||||||
6661 | inline bool Type::isUndeducedAutoType() const { | ||||||||
6662 | return isa<AutoType>(CanonicalType); | ||||||||
6663 | } | ||||||||
6664 | |||||||||
6665 | inline bool Type::isObjCQualifiedIdType() const { | ||||||||
6666 | if (const auto *OPT = getAs<ObjCObjectPointerType>()) | ||||||||
6667 | return OPT->isObjCQualifiedIdType(); | ||||||||
6668 | return false; | ||||||||
6669 | } | ||||||||
6670 | |||||||||
6671 | inline bool Type::isObjCQualifiedClassType() const { | ||||||||
6672 | if (const auto *OPT = getAs<ObjCObjectPointerType>()) | ||||||||
6673 | return OPT->isObjCQualifiedClassType(); | ||||||||
6674 | return false; | ||||||||
6675 | } | ||||||||
6676 | |||||||||
6677 | inline bool Type::isObjCIdType() const { | ||||||||
6678 | if (const auto *OPT = getAs<ObjCObjectPointerType>()) | ||||||||
6679 | return OPT->isObjCIdType(); | ||||||||
6680 | return false; | ||||||||
6681 | } | ||||||||
6682 | |||||||||
6683 | inline bool Type::isObjCClassType() const { | ||||||||
6684 | if (const auto *OPT = getAs<ObjCObjectPointerType>()) | ||||||||
6685 | return OPT->isObjCClassType(); | ||||||||
6686 | return false; | ||||||||
6687 | } | ||||||||
6688 | |||||||||
6689 | inline bool Type::isObjCSelType() const { | ||||||||
6690 | if (const auto *OPT = getAs<PointerType>()) | ||||||||
6691 | return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); | ||||||||
6692 | return false; | ||||||||
6693 | } | ||||||||
6694 | |||||||||
6695 | inline bool Type::isObjCBuiltinType() const { | ||||||||
6696 | return isObjCIdType() || isObjCClassType() || isObjCSelType(); | ||||||||
6697 | } | ||||||||
6698 | |||||||||
6699 | inline bool Type::isDecltypeType() const { | ||||||||
6700 | return isa<DecltypeType>(this); | ||||||||
6701 | } | ||||||||
6702 | |||||||||
6703 | #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \ | ||||||||
6704 | inline bool Type::is##Id##Type() const { \ | ||||||||
6705 | return isSpecificBuiltinType(BuiltinType::Id); \ | ||||||||
6706 | } | ||||||||
6707 | #include "clang/Basic/OpenCLImageTypes.def" | ||||||||
6708 | |||||||||
6709 | inline bool Type::isSamplerT() const { | ||||||||
6710 | return isSpecificBuiltinType(BuiltinType::OCLSampler); | ||||||||
6711 | } | ||||||||
6712 | |||||||||
6713 | inline bool Type::isEventT() const { | ||||||||
6714 | return isSpecificBuiltinType(BuiltinType::OCLEvent); | ||||||||
6715 | } | ||||||||
6716 | |||||||||
6717 | inline bool Type::isClkEventT() const { | ||||||||
6718 | return isSpecificBuiltinType(BuiltinType::OCLClkEvent); | ||||||||
6719 | } | ||||||||
6720 | |||||||||
6721 | inline bool Type::isQueueT() const { | ||||||||
6722 | return isSpecificBuiltinType(BuiltinType::OCLQueue); | ||||||||
6723 | } | ||||||||
6724 | |||||||||
6725 | inline bool Type::isReserveIDT() const { | ||||||||
6726 | return isSpecificBuiltinType(BuiltinType::OCLReserveID); | ||||||||
6727 | } | ||||||||
6728 | |||||||||
6729 | inline bool Type::isImageType() const { | ||||||||
6730 | #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) is##Id##Type() || | ||||||||
6731 | return | ||||||||
6732 | #include "clang/Basic/OpenCLImageTypes.def" | ||||||||
6733 | false; // end boolean or operation | ||||||||
6734 | } | ||||||||
6735 | |||||||||
6736 | inline bool Type::isPipeType() const { | ||||||||
6737 | return isa<PipeType>(CanonicalType); | ||||||||
6738 | } | ||||||||
6739 | |||||||||
6740 | #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \ | ||||||||
6741 | inline bool Type::is##Id##Type() const { \ | ||||||||
6742 | return isSpecificBuiltinType(BuiltinType::Id); \ | ||||||||
6743 | } | ||||||||
6744 | #include "clang/Basic/OpenCLExtensionTypes.def" | ||||||||
6745 | |||||||||
6746 | inline bool Type::isOCLIntelSubgroupAVCType() const { | ||||||||
6747 | #define INTEL_SUBGROUP_AVC_TYPE(ExtType, Id) \ | ||||||||
6748 | isOCLIntelSubgroupAVC##Id##Type() || | ||||||||
6749 | return | ||||||||
6750 | #include "clang/Basic/OpenCLExtensionTypes.def" | ||||||||
6751 | false; // end of boolean or operation | ||||||||
6752 | } | ||||||||
6753 | |||||||||
6754 | inline bool Type::isOCLExtOpaqueType() const { | ||||||||
6755 | #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) is##Id##Type() || | ||||||||
6756 | return | ||||||||
6757 | #include "clang/Basic/OpenCLExtensionTypes.def" | ||||||||
6758 | false; // end of boolean or operation | ||||||||
6759 | } | ||||||||
6760 | |||||||||
6761 | inline bool Type::isOpenCLSpecificType() const { | ||||||||
6762 | return isSamplerT() || isEventT() || isImageType() || isClkEventT() || | ||||||||
6763 | isQueueT() || isReserveIDT() || isPipeType() || isOCLExtOpaqueType(); | ||||||||
6764 | } | ||||||||
6765 | |||||||||
6766 | inline bool Type::isTemplateTypeParmType() const { | ||||||||
6767 | return isa<TemplateTypeParmType>(CanonicalType); | ||||||||
6768 | } | ||||||||
6769 | |||||||||
6770 | inline bool Type::isSpecificBuiltinType(unsigned K) const { | ||||||||
6771 | if (const BuiltinType *BT
| ||||||||
6772 | if (BT->getKind() == (BuiltinType::Kind) K) | ||||||||
6773 | return true; | ||||||||
6774 | return false; | ||||||||
6775 | } | ||||||||
6776 | |||||||||
6777 | inline bool Type::isPlaceholderType() const { | ||||||||
6778 | if (const auto *BT = dyn_cast<BuiltinType>(this)) | ||||||||
6779 | return BT->isPlaceholderType(); | ||||||||
6780 | return false; | ||||||||
6781 | } | ||||||||
6782 | |||||||||
6783 | inline const BuiltinType *Type::getAsPlaceholderType() const { | ||||||||
6784 | if (const auto *BT = dyn_cast<BuiltinType>(this)) | ||||||||
6785 | if (BT->isPlaceholderType()) | ||||||||
6786 | return BT; | ||||||||
6787 | return nullptr; | ||||||||
6788 | } | ||||||||
6789 | |||||||||
6790 | inline bool Type::isSpecificPlaceholderType(unsigned K) const { | ||||||||
6791 | assert(BuiltinType::isPlaceholderTypeKind((BuiltinType::Kind) K))((BuiltinType::isPlaceholderTypeKind((BuiltinType::Kind) K)) ? static_cast<void> (0) : __assert_fail ("BuiltinType::isPlaceholderTypeKind((BuiltinType::Kind) K)" , "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 6791, __PRETTY_FUNCTION__)); | ||||||||
6792 | if (const auto *BT = dyn_cast<BuiltinType>(this)) | ||||||||
6793 | return (BT->getKind() == (BuiltinType::Kind) K); | ||||||||
6794 | return false; | ||||||||
6795 | } | ||||||||
6796 | |||||||||
6797 | inline bool Type::isNonOverloadPlaceholderType() const { | ||||||||
6798 | if (const auto *BT = dyn_cast<BuiltinType>(this)) | ||||||||
6799 | return BT->isNonOverloadPlaceholderType(); | ||||||||
6800 | return false; | ||||||||
6801 | } | ||||||||
6802 | |||||||||
6803 | inline bool Type::isVoidType() const { | ||||||||
6804 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) | ||||||||
6805 | return BT->getKind() == BuiltinType::Void; | ||||||||
6806 | return false; | ||||||||
6807 | } | ||||||||
6808 | |||||||||
6809 | inline bool Type::isHalfType() const { | ||||||||
6810 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) | ||||||||
6811 | return BT->getKind() == BuiltinType::Half; | ||||||||
6812 | // FIXME: Should we allow complex __fp16? Probably not. | ||||||||
6813 | return false; | ||||||||
6814 | } | ||||||||
6815 | |||||||||
6816 | inline bool Type::isFloat16Type() const { | ||||||||
6817 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) | ||||||||
6818 | return BT->getKind() == BuiltinType::Float16; | ||||||||
6819 | return false; | ||||||||
6820 | } | ||||||||
6821 | |||||||||
6822 | inline bool Type::isFloat128Type() const { | ||||||||
6823 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) | ||||||||
6824 | return BT->getKind() == BuiltinType::Float128; | ||||||||
6825 | return false; | ||||||||
6826 | } | ||||||||
6827 | |||||||||
6828 | inline bool Type::isNullPtrType() const { | ||||||||
6829 | if (const auto *BT = getAs<BuiltinType>()) | ||||||||
6830 | return BT->getKind() == BuiltinType::NullPtr; | ||||||||
6831 | return false; | ||||||||
6832 | } | ||||||||
6833 | |||||||||
6834 | bool IsEnumDeclComplete(EnumDecl *); | ||||||||
6835 | bool IsEnumDeclScoped(EnumDecl *); | ||||||||
6836 | |||||||||
6837 | inline bool Type::isIntegerType() const { | ||||||||
6838 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) | ||||||||
6839 | return BT->getKind() >= BuiltinType::Bool && | ||||||||
6840 | BT->getKind() <= BuiltinType::Int128; | ||||||||
6841 | if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) { | ||||||||
6842 | // Incomplete enum types are not treated as integer types. | ||||||||
6843 | // FIXME: In C++, enum types are never integer types. | ||||||||
6844 | return IsEnumDeclComplete(ET->getDecl()) && | ||||||||
6845 | !IsEnumDeclScoped(ET->getDecl()); | ||||||||
6846 | } | ||||||||
6847 | return false; | ||||||||
6848 | } | ||||||||
6849 | |||||||||
6850 | inline bool Type::isFixedPointType() const { | ||||||||
6851 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) { | ||||||||
6852 | return BT->getKind() >= BuiltinType::ShortAccum && | ||||||||
6853 | BT->getKind() <= BuiltinType::SatULongFract; | ||||||||
6854 | } | ||||||||
6855 | return false; | ||||||||
6856 | } | ||||||||
6857 | |||||||||
6858 | inline bool Type::isFixedPointOrIntegerType() const { | ||||||||
6859 | return isFixedPointType() || isIntegerType(); | ||||||||
6860 | } | ||||||||
6861 | |||||||||
6862 | inline bool Type::isSaturatedFixedPointType() const { | ||||||||
6863 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) { | ||||||||
6864 | return BT->getKind() >= BuiltinType::SatShortAccum && | ||||||||
6865 | BT->getKind() <= BuiltinType::SatULongFract; | ||||||||
6866 | } | ||||||||
6867 | return false; | ||||||||
6868 | } | ||||||||
6869 | |||||||||
6870 | inline bool Type::isUnsaturatedFixedPointType() const { | ||||||||
6871 | return isFixedPointType() && !isSaturatedFixedPointType(); | ||||||||
6872 | } | ||||||||
6873 | |||||||||
6874 | inline bool Type::isSignedFixedPointType() const { | ||||||||
6875 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) { | ||||||||
6876 | return ((BT->getKind() >= BuiltinType::ShortAccum && | ||||||||
6877 | BT->getKind() <= BuiltinType::LongAccum) || | ||||||||
6878 | (BT->getKind() >= BuiltinType::ShortFract && | ||||||||
6879 | BT->getKind() <= BuiltinType::LongFract) || | ||||||||
6880 | (BT->getKind() >= BuiltinType::SatShortAccum && | ||||||||
6881 | BT->getKind() <= BuiltinType::SatLongAccum) || | ||||||||
6882 | (BT->getKind() >= BuiltinType::SatShortFract && | ||||||||
6883 | BT->getKind() <= BuiltinType::SatLongFract)); | ||||||||
6884 | } | ||||||||
6885 | return false; | ||||||||
6886 | } | ||||||||
6887 | |||||||||
6888 | inline bool Type::isUnsignedFixedPointType() const { | ||||||||
6889 | return isFixedPointType() && !isSignedFixedPointType(); | ||||||||
6890 | } | ||||||||
6891 | |||||||||
6892 | inline bool Type::isScalarType() const { | ||||||||
6893 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) | ||||||||
6894 | return BT->getKind() > BuiltinType::Void && | ||||||||
6895 | BT->getKind() <= BuiltinType::NullPtr; | ||||||||
6896 | if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) | ||||||||
6897 | // Enums are scalar types, but only if they are defined. Incomplete enums | ||||||||
6898 | // are not treated as scalar types. | ||||||||
6899 | return IsEnumDeclComplete(ET->getDecl()); | ||||||||
6900 | return isa<PointerType>(CanonicalType) || | ||||||||
6901 | isa<BlockPointerType>(CanonicalType) || | ||||||||
6902 | isa<MemberPointerType>(CanonicalType) || | ||||||||
6903 | isa<ComplexType>(CanonicalType) || | ||||||||
6904 | isa<ObjCObjectPointerType>(CanonicalType); | ||||||||
6905 | } | ||||||||
6906 | |||||||||
6907 | inline bool Type::isIntegralOrEnumerationType() const { | ||||||||
6908 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) | ||||||||
6909 | return BT->getKind() >= BuiltinType::Bool && | ||||||||
6910 | BT->getKind() <= BuiltinType::Int128; | ||||||||
6911 | |||||||||
6912 | // Check for a complete enum type; incomplete enum types are not properly an | ||||||||
6913 | // enumeration type in the sense required here. | ||||||||
6914 | if (const auto *ET = dyn_cast<EnumType>(CanonicalType)) | ||||||||
6915 | return IsEnumDeclComplete(ET->getDecl()); | ||||||||
6916 | |||||||||
6917 | return false; | ||||||||
6918 | } | ||||||||
6919 | |||||||||
6920 | inline bool Type::isBooleanType() const { | ||||||||
6921 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) | ||||||||
6922 | return BT->getKind() == BuiltinType::Bool; | ||||||||
6923 | return false; | ||||||||
6924 | } | ||||||||
6925 | |||||||||
6926 | inline bool Type::isUndeducedType() const { | ||||||||
6927 | auto *DT = getContainedDeducedType(); | ||||||||
6928 | return DT && !DT->isDeduced(); | ||||||||
6929 | } | ||||||||
6930 | |||||||||
6931 | /// Determines whether this is a type for which one can define | ||||||||
6932 | /// an overloaded operator. | ||||||||
6933 | inline bool Type::isOverloadableType() const { | ||||||||
6934 | return isDependentType() || isRecordType() || isEnumeralType(); | ||||||||
6935 | } | ||||||||
6936 | |||||||||
6937 | /// Determines whether this type can decay to a pointer type. | ||||||||
6938 | inline bool Type::canDecayToPointerType() const { | ||||||||
6939 | return isFunctionType() || isArrayType(); | ||||||||
6940 | } | ||||||||
6941 | |||||||||
6942 | inline bool Type::hasPointerRepresentation() const { | ||||||||
6943 | return (isPointerType() || isReferenceType() || isBlockPointerType() || | ||||||||
6944 | isObjCObjectPointerType() || isNullPtrType()); | ||||||||
6945 | } | ||||||||
6946 | |||||||||
6947 | inline bool Type::hasObjCPointerRepresentation() const { | ||||||||
6948 | return isObjCObjectPointerType(); | ||||||||
6949 | } | ||||||||
6950 | |||||||||
6951 | inline const Type *Type::getBaseElementTypeUnsafe() const { | ||||||||
6952 | const Type *type = this; | ||||||||
6953 | while (const ArrayType *arrayType = type->getAsArrayTypeUnsafe()) | ||||||||
6954 | type = arrayType->getElementType().getTypePtr(); | ||||||||
6955 | return type; | ||||||||
6956 | } | ||||||||
6957 | |||||||||
6958 | inline const Type *Type::getPointeeOrArrayElementType() const { | ||||||||
6959 | const Type *type = this; | ||||||||
6960 | if (type->isAnyPointerType()) | ||||||||
6961 | return type->getPointeeType().getTypePtr(); | ||||||||
6962 | else if (type->isArrayType()) | ||||||||
6963 | return type->getBaseElementTypeUnsafe(); | ||||||||
6964 | return type; | ||||||||
6965 | } | ||||||||
6966 | /// Insertion operator for diagnostics. This allows sending address spaces into | ||||||||
6967 | /// a diagnostic with <<. | ||||||||
6968 | inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, | ||||||||
6969 | LangAS AS) { | ||||||||
6970 | DB.AddTaggedVal(static_cast<std::underlying_type_t<LangAS>>(AS), | ||||||||
6971 | DiagnosticsEngine::ArgumentKind::ak_addrspace); | ||||||||
6972 | return DB; | ||||||||
6973 | } | ||||||||
6974 | |||||||||
6975 | /// Insertion operator for partial diagnostics. This allows sending adress | ||||||||
6976 | /// spaces into a diagnostic with <<. | ||||||||
6977 | inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, | ||||||||
6978 | LangAS AS) { | ||||||||
6979 | PD.AddTaggedVal(static_cast<std::underlying_type_t<LangAS>>(AS), | ||||||||
6980 | DiagnosticsEngine::ArgumentKind::ak_addrspace); | ||||||||
6981 | return PD; | ||||||||
6982 | } | ||||||||
6983 | |||||||||
6984 | /// Insertion operator for diagnostics. This allows sending Qualifiers into a | ||||||||
6985 | /// diagnostic with <<. | ||||||||
6986 | inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, | ||||||||
6987 | Qualifiers Q) { | ||||||||
6988 | DB.AddTaggedVal(Q.getAsOpaqueValue(), | ||||||||
6989 | DiagnosticsEngine::ArgumentKind::ak_qual); | ||||||||
6990 | return DB; | ||||||||
6991 | } | ||||||||
6992 | |||||||||
6993 | /// Insertion operator for partial diagnostics. This allows sending Qualifiers | ||||||||
6994 | /// into a diagnostic with <<. | ||||||||
6995 | inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, | ||||||||
6996 | Qualifiers Q) { | ||||||||
6997 | PD.AddTaggedVal(Q.getAsOpaqueValue(), | ||||||||
6998 | DiagnosticsEngine::ArgumentKind::ak_qual); | ||||||||
6999 | return PD; | ||||||||
7000 | } | ||||||||
7001 | |||||||||
7002 | /// Insertion operator for diagnostics. This allows sending QualType's into a | ||||||||
7003 | /// diagnostic with <<. | ||||||||
7004 | inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, | ||||||||
7005 | QualType T) { | ||||||||
7006 | DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), | ||||||||
7007 | DiagnosticsEngine::ak_qualtype); | ||||||||
7008 | return DB; | ||||||||
7009 | } | ||||||||
7010 | |||||||||
7011 | /// Insertion operator for partial diagnostics. This allows sending QualType's | ||||||||
7012 | /// into a diagnostic with <<. | ||||||||
7013 | inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, | ||||||||
7014 | QualType T) { | ||||||||
7015 | PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), | ||||||||
7016 | DiagnosticsEngine::ak_qualtype); | ||||||||
7017 | return PD; | ||||||||
7018 | } | ||||||||
7019 | |||||||||
7020 | // Helper class template that is used by Type::getAs to ensure that one does | ||||||||
7021 | // not try to look through a qualified type to get to an array type. | ||||||||
7022 | template <typename T> | ||||||||
7023 | using TypeIsArrayType = | ||||||||
7024 | std::integral_constant<bool, std::is_same<T, ArrayType>::value || | ||||||||
7025 | std::is_base_of<ArrayType, T>::value>; | ||||||||
7026 | |||||||||
7027 | // Member-template getAs<specific type>'. | ||||||||
7028 | template <typename T> const T *Type::getAs() const { | ||||||||
7029 | static_assert(!TypeIsArrayType<T>::value, | ||||||||
7030 | "ArrayType cannot be used with getAs!"); | ||||||||
7031 | |||||||||
7032 | // If this is directly a T type, return it. | ||||||||
7033 | if (const auto *Ty = dyn_cast<T>(this)) | ||||||||
7034 | return Ty; | ||||||||
7035 | |||||||||
7036 | // If the canonical form of this type isn't the right kind, reject it. | ||||||||
7037 | if (!isa<T>(CanonicalType)) | ||||||||
7038 | return nullptr; | ||||||||
7039 | |||||||||
7040 | // If this is a typedef for the type, strip the typedef off without | ||||||||
7041 | // losing all typedef information. | ||||||||
7042 | return cast<T>(getUnqualifiedDesugaredType()); | ||||||||
7043 | } | ||||||||
7044 | |||||||||
7045 | template <typename T> const T *Type::getAsAdjusted() const { | ||||||||
7046 | static_assert(!TypeIsArrayType<T>::value, "ArrayType cannot be used with getAsAdjusted!"); | ||||||||
7047 | |||||||||
7048 | // If this is directly a T type, return it. | ||||||||
7049 | if (const auto *Ty = dyn_cast<T>(this)) | ||||||||
7050 | return Ty; | ||||||||
7051 | |||||||||
7052 | // If the canonical form of this type isn't the right kind, reject it. | ||||||||
7053 | if (!isa<T>(CanonicalType)) | ||||||||
7054 | return nullptr; | ||||||||
7055 | |||||||||
7056 | // Strip off type adjustments that do not modify the underlying nature of the | ||||||||
7057 | // type. | ||||||||
7058 | const Type *Ty = this; | ||||||||
7059 | while (Ty) { | ||||||||
7060 | if (const auto *A = dyn_cast<AttributedType>(Ty)) | ||||||||
7061 | Ty = A->getModifiedType().getTypePtr(); | ||||||||
7062 | else if (const auto *E = dyn_cast<ElaboratedType>(Ty)) | ||||||||
7063 | Ty = E->desugar().getTypePtr(); | ||||||||
7064 | else if (const auto *P = dyn_cast<ParenType>(Ty)) | ||||||||
7065 | Ty = P->desugar().getTypePtr(); | ||||||||
7066 | else if (const auto *A = dyn_cast<AdjustedType>(Ty)) | ||||||||
7067 | Ty = A->desugar().getTypePtr(); | ||||||||
7068 | else if (const auto *M = dyn_cast<MacroQualifiedType>(Ty)) | ||||||||
7069 | Ty = M->desugar().getTypePtr(); | ||||||||
7070 | else | ||||||||
7071 | break; | ||||||||
7072 | } | ||||||||
7073 | |||||||||
7074 | // Just because the canonical type is correct does not mean we can use cast<>, | ||||||||
7075 | // since we may not have stripped off all the sugar down to the base type. | ||||||||
7076 | return dyn_cast<T>(Ty); | ||||||||
7077 | } | ||||||||
7078 | |||||||||
7079 | inline const ArrayType *Type::getAsArrayTypeUnsafe() const { | ||||||||
7080 | // If this is directly an array type, return it. | ||||||||
7081 | if (const auto *arr = dyn_cast<ArrayType>(this)) | ||||||||
7082 | return arr; | ||||||||
7083 | |||||||||
7084 | // If the canonical form of this type isn't the right kind, reject it. | ||||||||
7085 | if (!isa<ArrayType>(CanonicalType)) | ||||||||
7086 | return nullptr; | ||||||||
7087 | |||||||||
7088 | // If this is a typedef for the type, strip the typedef off without | ||||||||
7089 | // losing all typedef information. | ||||||||
7090 | return cast<ArrayType>(getUnqualifiedDesugaredType()); | ||||||||
7091 | } | ||||||||
7092 | |||||||||
7093 | template <typename T> const T *Type::castAs() const { | ||||||||
7094 | static_assert(!TypeIsArrayType<T>::value, | ||||||||
7095 | "ArrayType cannot be used with castAs!"); | ||||||||
7096 | |||||||||
7097 | if (const auto *ty = dyn_cast<T>(this)) return ty; | ||||||||
7098 | assert(isa<T>(CanonicalType))((isa<T>(CanonicalType)) ? static_cast<void> (0) : __assert_fail ("isa<T>(CanonicalType)", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 7098, __PRETTY_FUNCTION__)); | ||||||||
7099 | return cast<T>(getUnqualifiedDesugaredType()); | ||||||||
7100 | } | ||||||||
7101 | |||||||||
7102 | inline const ArrayType *Type::castAsArrayTypeUnsafe() const { | ||||||||
7103 | assert(isa<ArrayType>(CanonicalType))((isa<ArrayType>(CanonicalType)) ? static_cast<void> (0) : __assert_fail ("isa<ArrayType>(CanonicalType)", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 7103, __PRETTY_FUNCTION__)); | ||||||||
7104 | if (const auto *arr = dyn_cast<ArrayType>(this)) return arr; | ||||||||
7105 | return cast<ArrayType>(getUnqualifiedDesugaredType()); | ||||||||
7106 | } | ||||||||
7107 | |||||||||
7108 | DecayedType::DecayedType(QualType OriginalType, QualType DecayedPtr, | ||||||||
7109 | QualType CanonicalPtr) | ||||||||
7110 | : AdjustedType(Decayed, OriginalType, DecayedPtr, CanonicalPtr) { | ||||||||
7111 | #ifndef NDEBUG | ||||||||
7112 | QualType Adjusted = getAdjustedType(); | ||||||||
7113 | (void)AttributedType::stripOuterNullability(Adjusted); | ||||||||
7114 | assert(isa<PointerType>(Adjusted))((isa<PointerType>(Adjusted)) ? static_cast<void> (0) : __assert_fail ("isa<PointerType>(Adjusted)", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include/clang/AST/Type.h" , 7114, __PRETTY_FUNCTION__)); | ||||||||
7115 | #endif | ||||||||
7116 | } | ||||||||
7117 | |||||||||
7118 | QualType DecayedType::getPointeeType() const { | ||||||||
7119 | QualType Decayed = getDecayedType(); | ||||||||
7120 | (void)AttributedType::stripOuterNullability(Decayed); | ||||||||
7121 | return cast<PointerType>(Decayed)->getPointeeType(); | ||||||||
7122 | } | ||||||||
7123 | |||||||||
7124 | // Get the decimal string representation of a fixed point type, represented | ||||||||
7125 | // as a scaled integer. | ||||||||
7126 | // TODO: At some point, we should change the arguments to instead just accept an | ||||||||
7127 | // APFixedPoint instead of APSInt and scale. | ||||||||
7128 | void FixedPointValueToString(SmallVectorImpl<char> &Str, llvm::APSInt Val, | ||||||||
7129 | unsigned Scale); | ||||||||
7130 | |||||||||
7131 | } // namespace clang | ||||||||
7132 | |||||||||
7133 | #endif // LLVM_CLANG_AST_TYPE_H |