1 //===--- DeclSpec.cpp - Declaration Specifier Semantic Analysis -----------===//
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
7 //===----------------------------------------------------------------------===//
9 // This file implements semantic analysis for declaration specifiers.
11 //===----------------------------------------------------------------------===//
13 #include "clang/Sema/DeclSpec.h"
14 #include "clang/AST/ASTContext.h"
15 #include "clang/AST/DeclCXX.h"
16 #include "clang/AST/Expr.h"
17 #include "clang/AST/LocInfoType.h"
18 #include "clang/AST/TypeLoc.h"
19 #include "clang/Basic/LangOptions.h"
20 #include "clang/Basic/TargetInfo.h"
21 #include "clang/Sema/ParsedTemplate.h"
22 #include "clang/Sema/Sema.h"
23 #include "clang/Sema/SemaDiagnostic.h"
24 #include "llvm/ADT/STLExtras.h"
25 #include "llvm/ADT/SmallString.h"
27 using namespace clang;
30 void UnqualifiedId::setTemplateId(TemplateIdAnnotation *TemplateId) {
31 assert(TemplateId && "NULL template-id annotation?");
32 Kind = UnqualifiedIdKind::IK_TemplateId;
33 this->TemplateId = TemplateId;
34 StartLocation = TemplateId->TemplateNameLoc;
35 EndLocation = TemplateId->RAngleLoc;
38 void UnqualifiedId::setConstructorTemplateId(TemplateIdAnnotation *TemplateId) {
39 assert(TemplateId && "NULL template-id annotation?");
40 Kind = UnqualifiedIdKind::IK_ConstructorTemplateId;
41 this->TemplateId = TemplateId;
42 StartLocation = TemplateId->TemplateNameLoc;
43 EndLocation = TemplateId->RAngleLoc;
46 void CXXScopeSpec::Extend(ASTContext &Context, SourceLocation TemplateKWLoc,
47 TypeLoc TL, SourceLocation ColonColonLoc) {
48 Builder.Extend(Context, TemplateKWLoc, TL, ColonColonLoc);
49 if (Range.getBegin().isInvalid())
50 Range.setBegin(TL.getBeginLoc());
51 Range.setEnd(ColonColonLoc);
53 assert(Range == Builder.getSourceRange() &&
54 "NestedNameSpecifierLoc range computation incorrect");
57 void CXXScopeSpec::Extend(ASTContext &Context, IdentifierInfo *Identifier,
58 SourceLocation IdentifierLoc,
59 SourceLocation ColonColonLoc) {
60 Builder.Extend(Context, Identifier, IdentifierLoc, ColonColonLoc);
62 if (Range.getBegin().isInvalid())
63 Range.setBegin(IdentifierLoc);
64 Range.setEnd(ColonColonLoc);
66 assert(Range == Builder.getSourceRange() &&
67 "NestedNameSpecifierLoc range computation incorrect");
70 void CXXScopeSpec::Extend(ASTContext &Context, NamespaceDecl *Namespace,
71 SourceLocation NamespaceLoc,
72 SourceLocation ColonColonLoc) {
73 Builder.Extend(Context, Namespace, NamespaceLoc, ColonColonLoc);
75 if (Range.getBegin().isInvalid())
76 Range.setBegin(NamespaceLoc);
77 Range.setEnd(ColonColonLoc);
79 assert(Range == Builder.getSourceRange() &&
80 "NestedNameSpecifierLoc range computation incorrect");
83 void CXXScopeSpec::Extend(ASTContext &Context, NamespaceAliasDecl *Alias,
84 SourceLocation AliasLoc,
85 SourceLocation ColonColonLoc) {
86 Builder.Extend(Context, Alias, AliasLoc, ColonColonLoc);
88 if (Range.getBegin().isInvalid())
89 Range.setBegin(AliasLoc);
90 Range.setEnd(ColonColonLoc);
92 assert(Range == Builder.getSourceRange() &&
93 "NestedNameSpecifierLoc range computation incorrect");
96 void CXXScopeSpec::MakeGlobal(ASTContext &Context,
97 SourceLocation ColonColonLoc) {
98 Builder.MakeGlobal(Context, ColonColonLoc);
100 Range = SourceRange(ColonColonLoc);
102 assert(Range == Builder.getSourceRange() &&
103 "NestedNameSpecifierLoc range computation incorrect");
106 void CXXScopeSpec::MakeSuper(ASTContext &Context, CXXRecordDecl *RD,
107 SourceLocation SuperLoc,
108 SourceLocation ColonColonLoc) {
109 Builder.MakeSuper(Context, RD, SuperLoc, ColonColonLoc);
111 Range.setBegin(SuperLoc);
112 Range.setEnd(ColonColonLoc);
114 assert(Range == Builder.getSourceRange() &&
115 "NestedNameSpecifierLoc range computation incorrect");
118 void CXXScopeSpec::MakeTrivial(ASTContext &Context,
119 NestedNameSpecifier *Qualifier, SourceRange R) {
120 Builder.MakeTrivial(Context, Qualifier, R);
124 void CXXScopeSpec::Adopt(NestedNameSpecifierLoc Other) {
126 Range = SourceRange();
131 Range = Other.getSourceRange();
132 Builder.Adopt(Other);
135 SourceLocation CXXScopeSpec::getLastQualifierNameLoc() const {
136 if (!Builder.getRepresentation())
137 return SourceLocation();
138 return Builder.getTemporary().getLocalBeginLoc();
141 NestedNameSpecifierLoc
142 CXXScopeSpec::getWithLocInContext(ASTContext &Context) const {
143 if (!Builder.getRepresentation())
144 return NestedNameSpecifierLoc();
146 return Builder.getWithLocInContext(Context);
149 /// DeclaratorChunk::getFunction - Return a DeclaratorChunk for a function.
150 /// "TheDeclarator" is the declarator that this will be added to.
151 DeclaratorChunk DeclaratorChunk::getFunction(bool hasProto,
153 SourceLocation LParenLoc,
156 SourceLocation EllipsisLoc,
157 SourceLocation RParenLoc,
158 bool RefQualifierIsLvalueRef,
159 SourceLocation RefQualifierLoc,
160 SourceLocation MutableLoc,
161 ExceptionSpecificationType
163 SourceRange ESpecRange,
164 ParsedType *Exceptions,
165 SourceRange *ExceptionRanges,
166 unsigned NumExceptions,
168 CachedTokens *ExceptionSpecTokens,
171 SourceLocation LocalRangeBegin,
172 SourceLocation LocalRangeEnd,
173 Declarator &TheDeclarator,
174 TypeResult TrailingReturnType,
175 DeclSpec *MethodQualifiers) {
176 assert(!(MethodQualifiers && MethodQualifiers->getTypeQualifiers() & DeclSpec::TQ_atomic) &&
177 "function cannot have _Atomic qualifier");
181 I.Loc = LocalRangeBegin;
182 I.EndLoc = LocalRangeEnd;
183 I.Fun.hasPrototype = hasProto;
184 I.Fun.isVariadic = EllipsisLoc.isValid();
185 I.Fun.isAmbiguous = isAmbiguous;
186 I.Fun.LParenLoc = LParenLoc.getRawEncoding();
187 I.Fun.EllipsisLoc = EllipsisLoc.getRawEncoding();
188 I.Fun.RParenLoc = RParenLoc.getRawEncoding();
189 I.Fun.DeleteParams = false;
190 I.Fun.NumParams = NumParams;
191 I.Fun.Params = nullptr;
192 I.Fun.RefQualifierIsLValueRef = RefQualifierIsLvalueRef;
193 I.Fun.RefQualifierLoc = RefQualifierLoc.getRawEncoding();
194 I.Fun.MutableLoc = MutableLoc.getRawEncoding();
195 I.Fun.ExceptionSpecType = ESpecType;
196 I.Fun.ExceptionSpecLocBeg = ESpecRange.getBegin().getRawEncoding();
197 I.Fun.ExceptionSpecLocEnd = ESpecRange.getEnd().getRawEncoding();
198 I.Fun.NumExceptionsOrDecls = 0;
199 I.Fun.Exceptions = nullptr;
200 I.Fun.NoexceptExpr = nullptr;
201 I.Fun.HasTrailingReturnType = TrailingReturnType.isUsable() ||
202 TrailingReturnType.isInvalid();
203 I.Fun.TrailingReturnType = TrailingReturnType.get();
204 I.Fun.MethodQualifiers = nullptr;
205 I.Fun.QualAttrFactory = nullptr;
207 if (MethodQualifiers && (MethodQualifiers->getTypeQualifiers() ||
208 MethodQualifiers->getAttributes().size())) {
209 auto &attrs = MethodQualifiers->getAttributes();
210 I.Fun.MethodQualifiers = new DeclSpec(attrs.getPool().getFactory());
211 MethodQualifiers->forEachCVRUQualifier(
212 [&](DeclSpec::TQ TypeQual, StringRef PrintName, SourceLocation SL) {
213 I.Fun.MethodQualifiers->SetTypeQual(TypeQual, SL);
215 I.Fun.MethodQualifiers->getAttributes().takeAllFrom(attrs);
216 I.Fun.MethodQualifiers->getAttributePool().takeAllFrom(attrs.getPool());
219 assert(I.Fun.ExceptionSpecType == ESpecType && "bitfield overflow");
221 // new[] a parameter array if needed.
223 // If the 'InlineParams' in Declarator is unused and big enough, put our
224 // parameter list there (in an effort to avoid new/delete traffic). If it
225 // is already used (consider a function returning a function pointer) or too
226 // small (function with too many parameters), go to the heap.
227 if (!TheDeclarator.InlineStorageUsed &&
228 NumParams <= llvm::array_lengthof(TheDeclarator.InlineParams)) {
229 I.Fun.Params = TheDeclarator.InlineParams;
230 new (I.Fun.Params) ParamInfo[NumParams];
231 I.Fun.DeleteParams = false;
232 TheDeclarator.InlineStorageUsed = true;
234 I.Fun.Params = new DeclaratorChunk::ParamInfo[NumParams];
235 I.Fun.DeleteParams = true;
237 for (unsigned i = 0; i < NumParams; i++)
238 I.Fun.Params[i] = std::move(Params[i]);
241 // Check what exception specification information we should actually store.
243 default: break; // By default, save nothing.
245 // new[] an exception array if needed
247 I.Fun.NumExceptionsOrDecls = NumExceptions;
248 I.Fun.Exceptions = new DeclaratorChunk::TypeAndRange[NumExceptions];
249 for (unsigned i = 0; i != NumExceptions; ++i) {
250 I.Fun.Exceptions[i].Ty = Exceptions[i];
251 I.Fun.Exceptions[i].Range = ExceptionRanges[i];
256 case EST_DependentNoexcept:
257 case EST_NoexceptFalse:
258 case EST_NoexceptTrue:
259 I.Fun.NoexceptExpr = NoexceptExpr;
263 I.Fun.ExceptionSpecTokens = ExceptionSpecTokens;
267 if (!DeclsInPrototype.empty()) {
268 assert(ESpecType == EST_None && NumExceptions == 0 &&
269 "cannot have exception specifiers and decls in prototype");
270 I.Fun.NumExceptionsOrDecls = DeclsInPrototype.size();
271 // Copy the array of decls into stable heap storage.
272 I.Fun.DeclsInPrototype = new NamedDecl *[DeclsInPrototype.size()];
273 for (size_t J = 0; J < DeclsInPrototype.size(); ++J)
274 I.Fun.DeclsInPrototype[J] = DeclsInPrototype[J];
280 void Declarator::setDecompositionBindings(
281 SourceLocation LSquareLoc,
282 ArrayRef<DecompositionDeclarator::Binding> Bindings,
283 SourceLocation RSquareLoc) {
284 assert(!hasName() && "declarator given multiple names!");
286 BindingGroup.LSquareLoc = LSquareLoc;
287 BindingGroup.RSquareLoc = RSquareLoc;
288 BindingGroup.NumBindings = Bindings.size();
289 Range.setEnd(RSquareLoc);
291 // We're now past the identifier.
292 SetIdentifier(nullptr, LSquareLoc);
293 Name.EndLocation = RSquareLoc;
295 // Allocate storage for bindings and stash them away.
296 if (Bindings.size()) {
297 if (!InlineStorageUsed &&
298 Bindings.size() <= llvm::array_lengthof(InlineBindings)) {
299 BindingGroup.Bindings = InlineBindings;
300 BindingGroup.DeleteBindings = false;
301 InlineStorageUsed = true;
303 BindingGroup.Bindings =
304 new DecompositionDeclarator::Binding[Bindings.size()];
305 BindingGroup.DeleteBindings = true;
307 std::uninitialized_copy(Bindings.begin(), Bindings.end(),
308 BindingGroup.Bindings);
312 bool Declarator::isDeclarationOfFunction() const {
313 for (unsigned i = 0, i_end = DeclTypeInfo.size(); i < i_end; ++i) {
314 switch (DeclTypeInfo[i].Kind) {
315 case DeclaratorChunk::Function:
317 case DeclaratorChunk::Paren:
319 case DeclaratorChunk::Pointer:
320 case DeclaratorChunk::Reference:
321 case DeclaratorChunk::Array:
322 case DeclaratorChunk::BlockPointer:
323 case DeclaratorChunk::MemberPointer:
324 case DeclaratorChunk::Pipe:
327 llvm_unreachable("Invalid type chunk");
330 switch (DS.getTypeSpecType()) {
357 case TST_unknown_anytype:
358 case TST_unspecified:
361 #define GENERIC_IMAGE_TYPE(ImgType, Id) case TST_##ImgType##_t:
362 #include "clang/Basic/OpenCLImageTypes.def"
365 case TST_decltype_auto:
366 // This must have an initializer, so can't be a function declaration,
367 // even if the initializer has function type.
372 if (Expr *E = DS.getRepAsExpr())
373 return E->getType()->isFunctionType();
376 case TST_underlyingType:
378 case TST_typeofType: {
379 QualType QT = DS.getRepAsType().get();
383 if (const LocInfoType *LIT = dyn_cast<LocInfoType>(QT))
389 return QT->isFunctionType();
393 llvm_unreachable("Invalid TypeSpecType!");
396 bool Declarator::isStaticMember() {
397 assert(getContext() == DeclaratorContext::MemberContext);
398 return getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_static ||
399 (getName().Kind == UnqualifiedIdKind::IK_OperatorFunctionId &&
400 CXXMethodDecl::isStaticOverloadedOperator(
401 getName().OperatorFunctionId.Operator));
404 bool Declarator::isCtorOrDtor() {
405 return (getName().getKind() == UnqualifiedIdKind::IK_ConstructorName) ||
406 (getName().getKind() == UnqualifiedIdKind::IK_DestructorName);
409 void DeclSpec::forEachCVRUQualifier(
410 llvm::function_ref<void(TQ, StringRef, SourceLocation)> Handle) {
411 if (TypeQualifiers & TQ_const)
412 Handle(TQ_const, "const", TQ_constLoc);
413 if (TypeQualifiers & TQ_volatile)
414 Handle(TQ_volatile, "volatile", TQ_volatileLoc);
415 if (TypeQualifiers & TQ_restrict)
416 Handle(TQ_restrict, "restrict", TQ_restrictLoc);
417 if (TypeQualifiers & TQ_unaligned)
418 Handle(TQ_unaligned, "unaligned", TQ_unalignedLoc);
421 void DeclSpec::forEachQualifier(
422 llvm::function_ref<void(TQ, StringRef, SourceLocation)> Handle) {
423 forEachCVRUQualifier(Handle);
424 // FIXME: Add code below to iterate through the attributes and call Handle.
427 bool DeclSpec::hasTagDefinition() const {
430 return cast<TagDecl>(getRepAsDecl())->isCompleteDefinition();
433 /// getParsedSpecifiers - Return a bitmask of which flavors of specifiers this
434 /// declaration specifier includes.
436 unsigned DeclSpec::getParsedSpecifiers() const {
438 if (StorageClassSpec != SCS_unspecified ||
439 ThreadStorageClassSpec != TSCS_unspecified)
440 Res |= PQ_StorageClassSpecifier;
442 if (TypeQualifiers != TQ_unspecified)
443 Res |= PQ_TypeQualifier;
445 if (hasTypeSpecifier())
446 Res |= PQ_TypeSpecifier;
448 if (FS_inline_specified || FS_virtual_specified || hasExplicitSpecifier() ||
449 FS_noreturn_specified || FS_forceinline_specified)
450 Res |= PQ_FunctionSpecifier;
454 template <class T> static bool BadSpecifier(T TNew, T TPrev,
455 const char *&PrevSpec,
457 bool IsExtension = true) {
458 PrevSpec = DeclSpec::getSpecifierName(TPrev);
460 DiagID = diag::err_invalid_decl_spec_combination;
462 DiagID = IsExtension ? diag::ext_warn_duplicate_declspec :
463 diag::warn_duplicate_declspec;
467 const char *DeclSpec::getSpecifierName(DeclSpec::SCS S) {
469 case DeclSpec::SCS_unspecified: return "unspecified";
470 case DeclSpec::SCS_typedef: return "typedef";
471 case DeclSpec::SCS_extern: return "extern";
472 case DeclSpec::SCS_static: return "static";
473 case DeclSpec::SCS_auto: return "auto";
474 case DeclSpec::SCS_register: return "register";
475 case DeclSpec::SCS_private_extern: return "__private_extern__";
476 case DeclSpec::SCS_mutable: return "mutable";
478 llvm_unreachable("Unknown typespec!");
481 const char *DeclSpec::getSpecifierName(DeclSpec::TSCS S) {
483 case DeclSpec::TSCS_unspecified: return "unspecified";
484 case DeclSpec::TSCS___thread: return "__thread";
485 case DeclSpec::TSCS_thread_local: return "thread_local";
486 case DeclSpec::TSCS__Thread_local: return "_Thread_local";
488 llvm_unreachable("Unknown typespec!");
491 const char *DeclSpec::getSpecifierName(TSW W) {
493 case TSW_unspecified: return "unspecified";
494 case TSW_short: return "short";
495 case TSW_long: return "long";
496 case TSW_longlong: return "long long";
498 llvm_unreachable("Unknown typespec!");
501 const char *DeclSpec::getSpecifierName(TSC C) {
503 case TSC_unspecified: return "unspecified";
504 case TSC_imaginary: return "imaginary";
505 case TSC_complex: return "complex";
507 llvm_unreachable("Unknown typespec!");
511 const char *DeclSpec::getSpecifierName(TSS S) {
513 case TSS_unspecified: return "unspecified";
514 case TSS_signed: return "signed";
515 case TSS_unsigned: return "unsigned";
517 llvm_unreachable("Unknown typespec!");
520 const char *DeclSpec::getSpecifierName(DeclSpec::TST T,
521 const PrintingPolicy &Policy) {
523 case DeclSpec::TST_unspecified: return "unspecified";
524 case DeclSpec::TST_void: return "void";
525 case DeclSpec::TST_char: return "char";
526 case DeclSpec::TST_wchar: return Policy.MSWChar ? "__wchar_t" : "wchar_t";
527 case DeclSpec::TST_char8: return "char8_t";
528 case DeclSpec::TST_char16: return "char16_t";
529 case DeclSpec::TST_char32: return "char32_t";
530 case DeclSpec::TST_int: return "int";
531 case DeclSpec::TST_int128: return "__int128";
532 case DeclSpec::TST_half: return "half";
533 case DeclSpec::TST_float: return "float";
534 case DeclSpec::TST_double: return "double";
535 case DeclSpec::TST_accum: return "_Accum";
536 case DeclSpec::TST_fract: return "_Fract";
537 case DeclSpec::TST_float16: return "_Float16";
538 case DeclSpec::TST_float128: return "__float128";
539 case DeclSpec::TST_bool: return Policy.Bool ? "bool" : "_Bool";
540 case DeclSpec::TST_decimal32: return "_Decimal32";
541 case DeclSpec::TST_decimal64: return "_Decimal64";
542 case DeclSpec::TST_decimal128: return "_Decimal128";
543 case DeclSpec::TST_enum: return "enum";
544 case DeclSpec::TST_class: return "class";
545 case DeclSpec::TST_union: return "union";
546 case DeclSpec::TST_struct: return "struct";
547 case DeclSpec::TST_interface: return "__interface";
548 case DeclSpec::TST_typename: return "type-name";
549 case DeclSpec::TST_typeofType:
550 case DeclSpec::TST_typeofExpr: return "typeof";
551 case DeclSpec::TST_auto: return "auto";
552 case DeclSpec::TST_auto_type: return "__auto_type";
553 case DeclSpec::TST_decltype: return "(decltype)";
554 case DeclSpec::TST_decltype_auto: return "decltype(auto)";
555 case DeclSpec::TST_underlyingType: return "__underlying_type";
556 case DeclSpec::TST_unknown_anytype: return "__unknown_anytype";
557 case DeclSpec::TST_atomic: return "_Atomic";
558 #define GENERIC_IMAGE_TYPE(ImgType, Id) \
559 case DeclSpec::TST_##ImgType##_t: \
560 return #ImgType "_t";
561 #include "clang/Basic/OpenCLImageTypes.def"
562 case DeclSpec::TST_error: return "(error)";
564 llvm_unreachable("Unknown typespec!");
567 const char *DeclSpec::getSpecifierName(ConstexprSpecKind C) {
569 case CSK_unspecified: return "unspecified";
570 case CSK_constexpr: return "constexpr";
571 case CSK_consteval: return "consteval";
572 case CSK_constinit: return "constinit";
574 llvm_unreachable("Unknown ConstexprSpecKind");
577 const char *DeclSpec::getSpecifierName(TQ T) {
579 case DeclSpec::TQ_unspecified: return "unspecified";
580 case DeclSpec::TQ_const: return "const";
581 case DeclSpec::TQ_restrict: return "restrict";
582 case DeclSpec::TQ_volatile: return "volatile";
583 case DeclSpec::TQ_atomic: return "_Atomic";
584 case DeclSpec::TQ_unaligned: return "__unaligned";
586 llvm_unreachable("Unknown typespec!");
589 bool DeclSpec::SetStorageClassSpec(Sema &S, SCS SC, SourceLocation Loc,
590 const char *&PrevSpec,
592 const PrintingPolicy &Policy) {
593 // OpenCL v1.1 s6.8g: "The extern, static, auto and register storage-class
594 // specifiers are not supported.
595 // It seems sensible to prohibit private_extern too
596 // The cl_clang_storage_class_specifiers extension enables support for
597 // these storage-class specifiers.
598 // OpenCL v1.2 s6.8 changes this to "The auto and register storage-class
599 // specifiers are not supported."
600 if (S.getLangOpts().OpenCL &&
601 !S.getOpenCLOptions().isEnabled("cl_clang_storage_class_specifiers")) {
604 case SCS_private_extern:
606 if (S.getLangOpts().OpenCLVersion < 120 &&
607 !S.getLangOpts().OpenCLCPlusPlus) {
608 DiagID = diag::err_opencl_unknown_type_specifier;
609 PrevSpec = getSpecifierName(SC);
615 DiagID = diag::err_opencl_unknown_type_specifier;
616 PrevSpec = getSpecifierName(SC);
623 if (StorageClassSpec != SCS_unspecified) {
624 // Maybe this is an attempt to use C++11 'auto' outside of C++11 mode.
625 bool isInvalid = true;
626 if (TypeSpecType == TST_unspecified && S.getLangOpts().CPlusPlus) {
628 return SetTypeSpecType(TST_auto, Loc, PrevSpec, DiagID, Policy);
629 if (StorageClassSpec == SCS_auto) {
630 isInvalid = SetTypeSpecType(TST_auto, StorageClassSpecLoc,
631 PrevSpec, DiagID, Policy);
632 assert(!isInvalid && "auto SCS -> TST recovery failed");
636 // Changing storage class is allowed only if the previous one
637 // was the 'extern' that is part of a linkage specification and
638 // the new storage class is 'typedef'.
640 !(SCS_extern_in_linkage_spec &&
641 StorageClassSpec == SCS_extern &&
643 return BadSpecifier(SC, (SCS)StorageClassSpec, PrevSpec, DiagID);
645 StorageClassSpec = SC;
646 StorageClassSpecLoc = Loc;
647 assert((unsigned)SC == StorageClassSpec && "SCS constants overflow bitfield");
651 bool DeclSpec::SetStorageClassSpecThread(TSCS TSC, SourceLocation Loc,
652 const char *&PrevSpec,
654 if (ThreadStorageClassSpec != TSCS_unspecified)
655 return BadSpecifier(TSC, (TSCS)ThreadStorageClassSpec, PrevSpec, DiagID);
657 ThreadStorageClassSpec = TSC;
658 ThreadStorageClassSpecLoc = Loc;
662 /// These methods set the specified attribute of the DeclSpec, but return true
663 /// and ignore the request if invalid (e.g. "extern" then "auto" is
665 bool DeclSpec::SetTypeSpecWidth(TSW W, SourceLocation Loc,
666 const char *&PrevSpec,
668 const PrintingPolicy &Policy) {
669 // Overwrite TSWRange.Begin only if TypeSpecWidth was unspecified, so that
670 // for 'long long' we will keep the source location of the first 'long'.
671 if (TypeSpecWidth == TSW_unspecified)
672 TSWRange.setBegin(Loc);
673 // Allow turning long -> long long.
674 else if (W != TSW_longlong || TypeSpecWidth != TSW_long)
675 return BadSpecifier(W, (TSW)TypeSpecWidth, PrevSpec, DiagID);
677 // Remember location of the last 'long'
678 TSWRange.setEnd(Loc);
682 bool DeclSpec::SetTypeSpecComplex(TSC C, SourceLocation Loc,
683 const char *&PrevSpec,
685 if (TypeSpecComplex != TSC_unspecified)
686 return BadSpecifier(C, (TSC)TypeSpecComplex, PrevSpec, DiagID);
692 bool DeclSpec::SetTypeSpecSign(TSS S, SourceLocation Loc,
693 const char *&PrevSpec,
695 if (TypeSpecSign != TSS_unspecified)
696 return BadSpecifier(S, (TSS)TypeSpecSign, PrevSpec, DiagID);
702 bool DeclSpec::SetTypeSpecType(TST T, SourceLocation Loc,
703 const char *&PrevSpec,
706 const PrintingPolicy &Policy) {
707 return SetTypeSpecType(T, Loc, Loc, PrevSpec, DiagID, Rep, Policy);
710 bool DeclSpec::SetTypeSpecType(TST T, SourceLocation TagKwLoc,
711 SourceLocation TagNameLoc,
712 const char *&PrevSpec,
715 const PrintingPolicy &Policy) {
716 assert(isTypeRep(T) && "T does not store a type");
717 assert(Rep && "no type provided!");
718 if (TypeSpecType == TST_error)
720 if (TypeSpecType != TST_unspecified) {
721 PrevSpec = DeclSpec::getSpecifierName((TST) TypeSpecType, Policy);
722 DiagID = diag::err_invalid_decl_spec_combination;
728 TSTNameLoc = TagNameLoc;
729 TypeSpecOwned = false;
733 bool DeclSpec::SetTypeSpecType(TST T, SourceLocation Loc,
734 const char *&PrevSpec,
737 const PrintingPolicy &Policy) {
738 assert(isExprRep(T) && "T does not store an expr");
739 assert(Rep && "no expression provided!");
740 if (TypeSpecType == TST_error)
742 if (TypeSpecType != TST_unspecified) {
743 PrevSpec = DeclSpec::getSpecifierName((TST) TypeSpecType, Policy);
744 DiagID = diag::err_invalid_decl_spec_combination;
751 TypeSpecOwned = false;
755 bool DeclSpec::SetTypeSpecType(TST T, SourceLocation Loc,
756 const char *&PrevSpec,
758 Decl *Rep, bool Owned,
759 const PrintingPolicy &Policy) {
760 return SetTypeSpecType(T, Loc, Loc, PrevSpec, DiagID, Rep, Owned, Policy);
763 bool DeclSpec::SetTypeSpecType(TST T, SourceLocation TagKwLoc,
764 SourceLocation TagNameLoc,
765 const char *&PrevSpec,
767 Decl *Rep, bool Owned,
768 const PrintingPolicy &Policy) {
769 assert(isDeclRep(T) && "T does not store a decl");
770 // Unlike the other cases, we don't assert that we actually get a decl.
772 if (TypeSpecType == TST_error)
774 if (TypeSpecType != TST_unspecified) {
775 PrevSpec = DeclSpec::getSpecifierName((TST) TypeSpecType, Policy);
776 DiagID = diag::err_invalid_decl_spec_combination;
782 TSTNameLoc = TagNameLoc;
783 TypeSpecOwned = Owned && Rep != nullptr;
787 bool DeclSpec::SetTypeSpecType(TST T, SourceLocation Loc,
788 const char *&PrevSpec,
790 const PrintingPolicy &Policy) {
791 assert(!isDeclRep(T) && !isTypeRep(T) && !isExprRep(T) &&
792 "rep required for these type-spec kinds!");
793 if (TypeSpecType == TST_error)
795 if (TypeSpecType != TST_unspecified) {
796 PrevSpec = DeclSpec::getSpecifierName((TST) TypeSpecType, Policy);
797 DiagID = diag::err_invalid_decl_spec_combination;
802 if (TypeAltiVecVector && (T == TST_bool) && !TypeAltiVecBool) {
803 TypeAltiVecBool = true;
807 TypeSpecOwned = false;
811 bool DeclSpec::SetTypeSpecSat(SourceLocation Loc, const char *&PrevSpec,
815 DiagID = diag::warn_duplicate_declspec;
824 bool DeclSpec::SetTypeAltiVecVector(bool isAltiVecVector, SourceLocation Loc,
825 const char *&PrevSpec, unsigned &DiagID,
826 const PrintingPolicy &Policy) {
827 if (TypeSpecType == TST_error)
829 if (TypeSpecType != TST_unspecified) {
830 PrevSpec = DeclSpec::getSpecifierName((TST) TypeSpecType, Policy);
831 DiagID = diag::err_invalid_vector_decl_spec_combination;
834 TypeAltiVecVector = isAltiVecVector;
839 bool DeclSpec::SetTypePipe(bool isPipe, SourceLocation Loc,
840 const char *&PrevSpec, unsigned &DiagID,
841 const PrintingPolicy &Policy) {
842 if (TypeSpecType == TST_error)
844 if (TypeSpecType != TST_unspecified) {
845 PrevSpec = DeclSpec::getSpecifierName((TST)TypeSpecType, Policy);
846 DiagID = diag::err_invalid_decl_spec_combination;
851 TypeSpecPipe = TSP_pipe;
856 bool DeclSpec::SetTypeAltiVecPixel(bool isAltiVecPixel, SourceLocation Loc,
857 const char *&PrevSpec, unsigned &DiagID,
858 const PrintingPolicy &Policy) {
859 if (TypeSpecType == TST_error)
861 if (!TypeAltiVecVector || TypeAltiVecPixel ||
862 (TypeSpecType != TST_unspecified)) {
863 PrevSpec = DeclSpec::getSpecifierName((TST) TypeSpecType, Policy);
864 DiagID = diag::err_invalid_pixel_decl_spec_combination;
867 TypeAltiVecPixel = isAltiVecPixel;
873 bool DeclSpec::SetTypeAltiVecBool(bool isAltiVecBool, SourceLocation Loc,
874 const char *&PrevSpec, unsigned &DiagID,
875 const PrintingPolicy &Policy) {
876 if (TypeSpecType == TST_error)
878 if (!TypeAltiVecVector || TypeAltiVecBool ||
879 (TypeSpecType != TST_unspecified)) {
880 PrevSpec = DeclSpec::getSpecifierName((TST) TypeSpecType, Policy);
881 DiagID = diag::err_invalid_vector_bool_decl_spec;
884 TypeAltiVecBool = isAltiVecBool;
890 bool DeclSpec::SetTypeSpecError() {
891 TypeSpecType = TST_error;
892 TypeSpecOwned = false;
893 TSTLoc = SourceLocation();
894 TSTNameLoc = SourceLocation();
898 bool DeclSpec::SetTypeQual(TQ T, SourceLocation Loc, const char *&PrevSpec,
899 unsigned &DiagID, const LangOptions &Lang) {
900 // Duplicates are permitted in C99 onwards, but are not permitted in C89 or
901 // C++. However, since this is likely not what the user intended, we will
902 // always warn. We do not need to set the qualifier's location since we
904 if (TypeQualifiers & T) {
905 bool IsExtension = true;
908 return BadSpecifier(T, T, PrevSpec, DiagID, IsExtension);
911 return SetTypeQual(T, Loc);
914 bool DeclSpec::SetTypeQual(TQ T, SourceLocation Loc) {
918 case TQ_unspecified: break;
919 case TQ_const: TQ_constLoc = Loc; return false;
920 case TQ_restrict: TQ_restrictLoc = Loc; return false;
921 case TQ_volatile: TQ_volatileLoc = Loc; return false;
922 case TQ_unaligned: TQ_unalignedLoc = Loc; return false;
923 case TQ_atomic: TQ_atomicLoc = Loc; return false;
926 llvm_unreachable("Unknown type qualifier!");
929 bool DeclSpec::setFunctionSpecInline(SourceLocation Loc, const char *&PrevSpec,
931 // 'inline inline' is ok. However, since this is likely not what the user
932 // intended, we will always warn, similar to duplicates of type qualifiers.
933 if (FS_inline_specified) {
934 DiagID = diag::warn_duplicate_declspec;
938 FS_inline_specified = true;
943 bool DeclSpec::setFunctionSpecForceInline(SourceLocation Loc, const char *&PrevSpec,
945 if (FS_forceinline_specified) {
946 DiagID = diag::warn_duplicate_declspec;
947 PrevSpec = "__forceinline";
950 FS_forceinline_specified = true;
951 FS_forceinlineLoc = Loc;
955 bool DeclSpec::setFunctionSpecVirtual(SourceLocation Loc,
956 const char *&PrevSpec,
958 // 'virtual virtual' is ok, but warn as this is likely not what the user
960 if (FS_virtual_specified) {
961 DiagID = diag::warn_duplicate_declspec;
962 PrevSpec = "virtual";
965 FS_virtual_specified = true;
970 bool DeclSpec::setFunctionSpecExplicit(SourceLocation Loc,
971 const char *&PrevSpec, unsigned &DiagID,
972 ExplicitSpecifier ExplicitSpec,
973 SourceLocation CloseParenLoc) {
974 assert((ExplicitSpec.getKind() == ExplicitSpecKind::ResolvedTrue ||
975 ExplicitSpec.getExpr()) &&
976 "invalid ExplicitSpecifier");
977 // 'explicit explicit' is ok, but warn as this is likely not what the user
979 if (hasExplicitSpecifier()) {
980 DiagID = (ExplicitSpec.getExpr() || FS_explicit_specifier.getExpr())
981 ? diag::err_duplicate_declspec
982 : diag::ext_warn_duplicate_declspec;
983 PrevSpec = "explicit";
986 FS_explicit_specifier = ExplicitSpec;
987 FS_explicitLoc = Loc;
988 FS_explicitCloseParenLoc = CloseParenLoc;
992 bool DeclSpec::setFunctionSpecNoreturn(SourceLocation Loc,
993 const char *&PrevSpec,
995 // '_Noreturn _Noreturn' is ok, but warn as this is likely not what the user
997 if (FS_noreturn_specified) {
998 DiagID = diag::warn_duplicate_declspec;
999 PrevSpec = "_Noreturn";
1002 FS_noreturn_specified = true;
1003 FS_noreturnLoc = Loc;
1007 bool DeclSpec::SetFriendSpec(SourceLocation Loc, const char *&PrevSpec,
1009 if (Friend_specified) {
1010 PrevSpec = "friend";
1011 // Keep the later location, so that we can later diagnose ill-formed
1012 // declarations like 'friend class X friend;'. Per [class.friend]p3,
1013 // 'friend' must be the first token in a friend declaration that is
1014 // not a function declaration.
1016 DiagID = diag::warn_duplicate_declspec;
1020 Friend_specified = true;
1025 bool DeclSpec::setModulePrivateSpec(SourceLocation Loc, const char *&PrevSpec,
1027 if (isModulePrivateSpecified()) {
1028 PrevSpec = "__module_private__";
1029 DiagID = diag::ext_warn_duplicate_declspec;
1033 ModulePrivateLoc = Loc;
1037 bool DeclSpec::SetConstexprSpec(ConstexprSpecKind ConstexprKind,
1038 SourceLocation Loc, const char *&PrevSpec,
1040 if (getConstexprSpecifier() != CSK_unspecified)
1041 return BadSpecifier(ConstexprKind, getConstexprSpecifier(), PrevSpec,
1043 ConstexprSpecifier = ConstexprKind;
1048 void DeclSpec::SaveWrittenBuiltinSpecs() {
1049 writtenBS.Sign = getTypeSpecSign();
1050 writtenBS.Width = getTypeSpecWidth();
1051 writtenBS.Type = getTypeSpecType();
1052 // Search the list of attributes for the presence of a mode attribute.
1053 writtenBS.ModeAttr = getAttributes().hasAttribute(ParsedAttr::AT_Mode);
1056 /// Finish - This does final analysis of the declspec, rejecting things like
1057 /// "_Imaginary" (lacking an FP type). This returns a diagnostic to issue or
1058 /// diag::NUM_DIAGNOSTICS if there is no error. After calling this method,
1059 /// DeclSpec is guaranteed self-consistent, even if an error occurred.
1060 void DeclSpec::Finish(Sema &S, const PrintingPolicy &Policy) {
1061 // Before possibly changing their values, save specs as written.
1062 SaveWrittenBuiltinSpecs();
1064 // Check the type specifier components first. No checking for an invalid
1066 if (TypeSpecType == TST_error)
1069 // If decltype(auto) is used, no other type specifiers are permitted.
1070 if (TypeSpecType == TST_decltype_auto &&
1071 (TypeSpecWidth != TSW_unspecified ||
1072 TypeSpecComplex != TSC_unspecified ||
1073 TypeSpecSign != TSS_unspecified ||
1074 TypeAltiVecVector || TypeAltiVecPixel || TypeAltiVecBool ||
1076 const unsigned NumLocs = 9;
1077 SourceLocation ExtraLocs[NumLocs] = {
1078 TSWRange.getBegin(), TSCLoc, TSSLoc,
1079 AltiVecLoc, TQ_constLoc, TQ_restrictLoc,
1080 TQ_volatileLoc, TQ_atomicLoc, TQ_unalignedLoc};
1081 FixItHint Hints[NumLocs];
1082 SourceLocation FirstLoc;
1083 for (unsigned I = 0; I != NumLocs; ++I) {
1084 if (ExtraLocs[I].isValid()) {
1085 if (FirstLoc.isInvalid() ||
1086 S.getSourceManager().isBeforeInTranslationUnit(ExtraLocs[I],
1088 FirstLoc = ExtraLocs[I];
1089 Hints[I] = FixItHint::CreateRemoval(ExtraLocs[I]);
1092 TypeSpecWidth = TSW_unspecified;
1093 TypeSpecComplex = TSC_unspecified;
1094 TypeSpecSign = TSS_unspecified;
1095 TypeAltiVecVector = TypeAltiVecPixel = TypeAltiVecBool = false;
1097 S.Diag(TSTLoc, diag::err_decltype_auto_cannot_be_combined)
1098 << Hints[0] << Hints[1] << Hints[2] << Hints[3]
1099 << Hints[4] << Hints[5] << Hints[6] << Hints[7];
1102 // Validate and finalize AltiVec vector declspec.
1103 if (TypeAltiVecVector) {
1104 if (TypeAltiVecBool) {
1105 // Sign specifiers are not allowed with vector bool. (PIM 2.1)
1106 if (TypeSpecSign != TSS_unspecified) {
1107 S.Diag(TSSLoc, diag::err_invalid_vector_bool_decl_spec)
1108 << getSpecifierName((TSS)TypeSpecSign);
1111 // Only char/int are valid with vector bool. (PIM 2.1)
1112 if (((TypeSpecType != TST_unspecified) && (TypeSpecType != TST_char) &&
1113 (TypeSpecType != TST_int)) || TypeAltiVecPixel) {
1114 S.Diag(TSTLoc, diag::err_invalid_vector_bool_decl_spec)
1115 << (TypeAltiVecPixel ? "__pixel" :
1116 getSpecifierName((TST)TypeSpecType, Policy));
1119 // Only 'short' and 'long long' are valid with vector bool. (PIM 2.1)
1120 if ((TypeSpecWidth != TSW_unspecified) && (TypeSpecWidth != TSW_short) &&
1121 (TypeSpecWidth != TSW_longlong))
1122 S.Diag(TSWRange.getBegin(), diag::err_invalid_vector_bool_decl_spec)
1123 << getSpecifierName((TSW)TypeSpecWidth);
1125 // vector bool long long requires VSX support or ZVector.
1126 if ((TypeSpecWidth == TSW_longlong) &&
1127 (!S.Context.getTargetInfo().hasFeature("vsx")) &&
1128 (!S.Context.getTargetInfo().hasFeature("power8-vector")) &&
1129 !S.getLangOpts().ZVector)
1130 S.Diag(TSTLoc, diag::err_invalid_vector_long_long_decl_spec);
1132 // Elements of vector bool are interpreted as unsigned. (PIM 2.1)
1133 if ((TypeSpecType == TST_char) || (TypeSpecType == TST_int) ||
1134 (TypeSpecWidth != TSW_unspecified))
1135 TypeSpecSign = TSS_unsigned;
1136 } else if (TypeSpecType == TST_double) {
1137 // vector long double and vector long long double are never allowed.
1138 // vector double is OK for Power7 and later, and ZVector.
1139 if (TypeSpecWidth == TSW_long || TypeSpecWidth == TSW_longlong)
1140 S.Diag(TSWRange.getBegin(),
1141 diag::err_invalid_vector_long_double_decl_spec);
1142 else if (!S.Context.getTargetInfo().hasFeature("vsx") &&
1143 !S.getLangOpts().ZVector)
1144 S.Diag(TSTLoc, diag::err_invalid_vector_double_decl_spec);
1145 } else if (TypeSpecType == TST_float) {
1146 // vector float is unsupported for ZVector unless we have the
1147 // vector-enhancements facility 1 (ISA revision 12).
1148 if (S.getLangOpts().ZVector &&
1149 !S.Context.getTargetInfo().hasFeature("arch12"))
1150 S.Diag(TSTLoc, diag::err_invalid_vector_float_decl_spec);
1151 } else if (TypeSpecWidth == TSW_long) {
1152 // vector long is unsupported for ZVector and deprecated for AltiVec.
1153 if (S.getLangOpts().ZVector)
1154 S.Diag(TSWRange.getBegin(), diag::err_invalid_vector_long_decl_spec);
1156 S.Diag(TSWRange.getBegin(),
1157 diag::warn_vector_long_decl_spec_combination)
1158 << getSpecifierName((TST)TypeSpecType, Policy);
1161 if (TypeAltiVecPixel) {
1162 //TODO: perform validation
1163 TypeSpecType = TST_int;
1164 TypeSpecSign = TSS_unsigned;
1165 TypeSpecWidth = TSW_short;
1166 TypeSpecOwned = false;
1170 bool IsFixedPointType =
1171 TypeSpecType == TST_accum || TypeSpecType == TST_fract;
1173 // signed/unsigned are only valid with int/char/wchar_t/_Accum.
1174 if (TypeSpecSign != TSS_unspecified) {
1175 if (TypeSpecType == TST_unspecified)
1176 TypeSpecType = TST_int; // unsigned -> unsigned int, signed -> signed int.
1177 else if (TypeSpecType != TST_int && TypeSpecType != TST_int128 &&
1178 TypeSpecType != TST_char && TypeSpecType != TST_wchar &&
1179 !IsFixedPointType) {
1180 S.Diag(TSSLoc, diag::err_invalid_sign_spec)
1181 << getSpecifierName((TST)TypeSpecType, Policy);
1182 // signed double -> double.
1183 TypeSpecSign = TSS_unspecified;
1187 // Validate the width of the type.
1188 switch (TypeSpecWidth) {
1189 case TSW_unspecified: break;
1190 case TSW_short: // short int
1191 case TSW_longlong: // long long int
1192 if (TypeSpecType == TST_unspecified)
1193 TypeSpecType = TST_int; // short -> short int, long long -> long long int.
1194 else if (!(TypeSpecType == TST_int ||
1195 (IsFixedPointType && TypeSpecWidth != TSW_longlong))) {
1196 S.Diag(TSWRange.getBegin(), diag::err_invalid_width_spec)
1197 << (int)TypeSpecWidth << getSpecifierName((TST)TypeSpecType, Policy);
1198 TypeSpecType = TST_int;
1199 TypeSpecSat = false;
1200 TypeSpecOwned = false;
1203 case TSW_long: // long double, long int
1204 if (TypeSpecType == TST_unspecified)
1205 TypeSpecType = TST_int; // long -> long int.
1206 else if (TypeSpecType != TST_int && TypeSpecType != TST_double &&
1207 !IsFixedPointType) {
1208 S.Diag(TSWRange.getBegin(), diag::err_invalid_width_spec)
1209 << (int)TypeSpecWidth << getSpecifierName((TST)TypeSpecType, Policy);
1210 TypeSpecType = TST_int;
1211 TypeSpecSat = false;
1212 TypeSpecOwned = false;
1217 // TODO: if the implementation does not implement _Complex or _Imaginary,
1218 // disallow their use. Need information about the backend.
1219 if (TypeSpecComplex != TSC_unspecified) {
1220 if (TypeSpecType == TST_unspecified) {
1221 S.Diag(TSCLoc, diag::ext_plain_complex)
1222 << FixItHint::CreateInsertion(
1223 S.getLocForEndOfToken(getTypeSpecComplexLoc()),
1225 TypeSpecType = TST_double; // _Complex -> _Complex double.
1226 } else if (TypeSpecType == TST_int || TypeSpecType == TST_char) {
1227 // Note that this intentionally doesn't include _Complex _Bool.
1228 if (!S.getLangOpts().CPlusPlus)
1229 S.Diag(TSTLoc, diag::ext_integer_complex);
1230 } else if (TypeSpecType != TST_float && TypeSpecType != TST_double) {
1231 S.Diag(TSCLoc, diag::err_invalid_complex_spec)
1232 << getSpecifierName((TST)TypeSpecType, Policy);
1233 TypeSpecComplex = TSC_unspecified;
1237 // C11 6.7.1/3, C++11 [dcl.stc]p1, GNU TLS: __thread, thread_local and
1238 // _Thread_local can only appear with the 'static' and 'extern' storage class
1239 // specifiers. We also allow __private_extern__ as an extension.
1240 if (ThreadStorageClassSpec != TSCS_unspecified) {
1241 switch (StorageClassSpec) {
1242 case SCS_unspecified:
1244 case SCS_private_extern:
1248 if (S.getSourceManager().isBeforeInTranslationUnit(
1249 getThreadStorageClassSpecLoc(), getStorageClassSpecLoc()))
1250 S.Diag(getStorageClassSpecLoc(),
1251 diag::err_invalid_decl_spec_combination)
1252 << DeclSpec::getSpecifierName(getThreadStorageClassSpec())
1253 << SourceRange(getThreadStorageClassSpecLoc());
1255 S.Diag(getThreadStorageClassSpecLoc(),
1256 diag::err_invalid_decl_spec_combination)
1257 << DeclSpec::getSpecifierName(getStorageClassSpec())
1258 << SourceRange(getStorageClassSpecLoc());
1259 // Discard the thread storage class specifier to recover.
1260 ThreadStorageClassSpec = TSCS_unspecified;
1261 ThreadStorageClassSpecLoc = SourceLocation();
1265 // If no type specifier was provided and we're parsing a language where
1266 // the type specifier is not optional, but we got 'auto' as a storage
1267 // class specifier, then assume this is an attempt to use C++0x's 'auto'
1269 if (S.getLangOpts().CPlusPlus &&
1270 TypeSpecType == TST_unspecified && StorageClassSpec == SCS_auto) {
1271 TypeSpecType = TST_auto;
1272 StorageClassSpec = SCS_unspecified;
1273 TSTLoc = TSTNameLoc = StorageClassSpecLoc;
1274 StorageClassSpecLoc = SourceLocation();
1276 // Diagnose if we've recovered from an ill-formed 'auto' storage class
1277 // specifier in a pre-C++11 dialect of C++.
1278 if (!S.getLangOpts().CPlusPlus11 && TypeSpecType == TST_auto)
1279 S.Diag(TSTLoc, diag::ext_auto_type_specifier);
1280 if (S.getLangOpts().CPlusPlus && !S.getLangOpts().CPlusPlus11 &&
1281 StorageClassSpec == SCS_auto)
1282 S.Diag(StorageClassSpecLoc, diag::warn_auto_storage_class)
1283 << FixItHint::CreateRemoval(StorageClassSpecLoc);
1284 if (TypeSpecType == TST_char8)
1285 S.Diag(TSTLoc, diag::warn_cxx17_compat_unicode_type);
1286 else if (TypeSpecType == TST_char16 || TypeSpecType == TST_char32)
1287 S.Diag(TSTLoc, diag::warn_cxx98_compat_unicode_type)
1288 << (TypeSpecType == TST_char16 ? "char16_t" : "char32_t");
1289 if (getConstexprSpecifier() == CSK_constexpr)
1290 S.Diag(ConstexprLoc, diag::warn_cxx98_compat_constexpr);
1291 else if (getConstexprSpecifier() == CSK_consteval)
1292 S.Diag(ConstexprLoc, diag::warn_cxx20_compat_consteval);
1293 else if (getConstexprSpecifier() == CSK_constinit)
1294 S.Diag(ConstexprLoc, diag::warn_cxx20_compat_constinit);
1295 // C++ [class.friend]p6:
1296 // No storage-class-specifier shall appear in the decl-specifier-seq
1297 // of a friend declaration.
1298 if (isFriendSpecified() &&
1299 (getStorageClassSpec() || getThreadStorageClassSpec())) {
1300 SmallString<32> SpecName;
1301 SourceLocation SCLoc;
1302 FixItHint StorageHint, ThreadHint;
1304 if (DeclSpec::SCS SC = getStorageClassSpec()) {
1305 SpecName = getSpecifierName(SC);
1306 SCLoc = getStorageClassSpecLoc();
1307 StorageHint = FixItHint::CreateRemoval(SCLoc);
1310 if (DeclSpec::TSCS TSC = getThreadStorageClassSpec()) {
1311 if (!SpecName.empty()) SpecName += " ";
1312 SpecName += getSpecifierName(TSC);
1313 SCLoc = getThreadStorageClassSpecLoc();
1314 ThreadHint = FixItHint::CreateRemoval(SCLoc);
1317 S.Diag(SCLoc, diag::err_friend_decl_spec)
1318 << SpecName << StorageHint << ThreadHint;
1320 ClearStorageClassSpecs();
1323 // C++11 [dcl.fct.spec]p5:
1324 // The virtual specifier shall be used only in the initial
1325 // declaration of a non-static class member function;
1326 // C++11 [dcl.fct.spec]p6:
1327 // The explicit specifier shall be used only in the declaration of
1328 // a constructor or conversion function within its class
1330 if (isFriendSpecified() && (isVirtualSpecified() || hasExplicitSpecifier())) {
1333 SourceLocation SCLoc;
1335 if (isVirtualSpecified()) {
1336 Keyword = "virtual";
1337 SCLoc = getVirtualSpecLoc();
1338 Hint = FixItHint::CreateRemoval(SCLoc);
1340 Keyword = "explicit";
1341 SCLoc = getExplicitSpecLoc();
1342 Hint = FixItHint::CreateRemoval(getExplicitSpecRange());
1345 S.Diag(SCLoc, diag::err_friend_decl_spec)
1348 FS_virtual_specified = false;
1349 FS_explicit_specifier = ExplicitSpecifier();
1350 FS_virtualLoc = FS_explicitLoc = SourceLocation();
1353 assert(!TypeSpecOwned || isDeclRep((TST) TypeSpecType));
1355 // Okay, now we can infer the real type.
1357 // TODO: return "auto function" and other bad things based on the real type.
1359 // 'data definition has no type or storage class'?
1362 bool DeclSpec::isMissingDeclaratorOk() {
1363 TST tst = getTypeSpecType();
1364 return isDeclRep(tst) && getRepAsDecl() != nullptr &&
1365 StorageClassSpec != DeclSpec::SCS_typedef;
1368 void UnqualifiedId::setOperatorFunctionId(SourceLocation OperatorLoc,
1369 OverloadedOperatorKind Op,
1370 SourceLocation SymbolLocations[3]) {
1371 Kind = UnqualifiedIdKind::IK_OperatorFunctionId;
1372 StartLocation = OperatorLoc;
1373 EndLocation = OperatorLoc;
1374 OperatorFunctionId.Operator = Op;
1375 for (unsigned I = 0; I != 3; ++I) {
1376 OperatorFunctionId.SymbolLocations[I] = SymbolLocations[I].getRawEncoding();
1378 if (SymbolLocations[I].isValid())
1379 EndLocation = SymbolLocations[I];
1383 bool VirtSpecifiers::SetSpecifier(Specifier VS, SourceLocation Loc,
1384 const char *&PrevSpec) {
1385 if (!FirstLocation.isValid())
1386 FirstLocation = Loc;
1390 if (Specifiers & VS) {
1391 PrevSpec = getSpecifierName(VS);
1398 default: llvm_unreachable("Unknown specifier!");
1399 case VS_Override: VS_overrideLoc = Loc; break;
1402 case VS_Final: VS_finalLoc = Loc; break;
1408 const char *VirtSpecifiers::getSpecifierName(Specifier VS) {
1410 default: llvm_unreachable("Unknown specifier");
1411 case VS_Override: return "override";
1412 case VS_Final: return "final";
1413 case VS_GNU_Final: return "__final";
1414 case VS_Sealed: return "sealed";