1 //===--- SemaType.cpp - Semantic Analysis for Types -----------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements type-related semantic analysis.
12 //===----------------------------------------------------------------------===//
14 #include "clang/Sema/SemaInternal.h"
15 #include "clang/AST/ASTContext.h"
16 #include "clang/AST/ASTMutationListener.h"
17 #include "clang/AST/CXXInheritance.h"
18 #include "clang/AST/DeclObjC.h"
19 #include "clang/AST/DeclTemplate.h"
20 #include "clang/AST/Expr.h"
21 #include "clang/AST/TypeLoc.h"
22 #include "clang/AST/TypeLocVisitor.h"
23 #include "clang/Basic/OpenCL.h"
24 #include "clang/Basic/PartialDiagnostic.h"
25 #include "clang/Basic/TargetInfo.h"
26 #include "clang/Lex/Preprocessor.h"
27 #include "clang/Parse/ParseDiagnostic.h"
28 #include "clang/Sema/DeclSpec.h"
29 #include "clang/Sema/DelayedDiagnostic.h"
30 #include "clang/Sema/Lookup.h"
31 #include "clang/Sema/ScopeInfo.h"
32 #include "clang/Sema/Template.h"
33 #include "llvm/ADT/SmallPtrSet.h"
34 #include "llvm/ADT/SmallString.h"
35 #include "llvm/Support/ErrorHandling.h"
36 using namespace clang;
38 /// isOmittedBlockReturnType - Return true if this declarator is missing a
39 /// return type because this is a omitted return type on a block literal.
40 static bool isOmittedBlockReturnType(const Declarator &D) {
41 if (D.getContext() != Declarator::BlockLiteralContext ||
42 D.getDeclSpec().hasTypeSpecifier())
45 if (D.getNumTypeObjects() == 0)
46 return true; // ^{ ... }
48 if (D.getNumTypeObjects() == 1 &&
49 D.getTypeObject(0).Kind == DeclaratorChunk::Function)
50 return true; // ^(int X, float Y) { ... }
55 /// diagnoseBadTypeAttribute - Diagnoses a type attribute which
56 /// doesn't apply to the given type.
57 static void diagnoseBadTypeAttribute(Sema &S, const AttributeList &attr,
59 bool useExpansionLoc = false;
62 switch (attr.getKind()) {
63 case AttributeList::AT_ObjCGC:
64 diagID = diag::warn_pointer_attribute_wrong_type;
65 useExpansionLoc = true;
68 case AttributeList::AT_ObjCOwnership:
69 diagID = diag::warn_objc_object_attribute_wrong_type;
70 useExpansionLoc = true;
74 // Assume everything else was a function attribute.
75 diagID = diag::warn_function_attribute_wrong_type;
79 SourceLocation loc = attr.getLoc();
80 StringRef name = attr.getName()->getName();
82 // The GC attributes are usually written with macros; special-case them.
83 if (useExpansionLoc && loc.isMacroID() && attr.getParameterName()) {
84 if (attr.getParameterName()->isStr("strong")) {
85 if (S.findMacroSpelling(loc, "__strong")) name = "__strong";
86 } else if (attr.getParameterName()->isStr("weak")) {
87 if (S.findMacroSpelling(loc, "__weak")) name = "__weak";
91 S.Diag(loc, diagID) << name << type;
94 // objc_gc applies to Objective-C pointers or, otherwise, to the
95 // smallest available pointer type (i.e. 'void*' in 'void**').
96 #define OBJC_POINTER_TYPE_ATTRS_CASELIST \
97 case AttributeList::AT_ObjCGC: \
98 case AttributeList::AT_ObjCOwnership
100 // Function type attributes.
101 #define FUNCTION_TYPE_ATTRS_CASELIST \
102 case AttributeList::AT_NoReturn: \
103 case AttributeList::AT_CDecl: \
104 case AttributeList::AT_FastCall: \
105 case AttributeList::AT_StdCall: \
106 case AttributeList::AT_ThisCall: \
107 case AttributeList::AT_Pascal: \
108 case AttributeList::AT_Regparm: \
109 case AttributeList::AT_Pcs: \
110 case AttributeList::AT_PnaclCall: \
111 case AttributeList::AT_IntelOclBicc \
114 /// An object which stores processing state for the entire
115 /// GetTypeForDeclarator process.
116 class TypeProcessingState {
119 /// The declarator being processed.
120 Declarator &declarator;
122 /// The index of the declarator chunk we're currently processing.
123 /// May be the total number of valid chunks, indicating the
127 /// Whether there are non-trivial modifications to the decl spec.
130 /// Whether we saved the attributes in the decl spec.
133 /// The original set of attributes on the DeclSpec.
134 SmallVector<AttributeList*, 2> savedAttrs;
136 /// A list of attributes to diagnose the uselessness of when the
137 /// processing is complete.
138 SmallVector<AttributeList*, 2> ignoredTypeAttrs;
141 TypeProcessingState(Sema &sema, Declarator &declarator)
142 : sema(sema), declarator(declarator),
143 chunkIndex(declarator.getNumTypeObjects()),
144 trivial(true), hasSavedAttrs(false) {}
146 Sema &getSema() const {
150 Declarator &getDeclarator() const {
154 bool isProcessingDeclSpec() const {
155 return chunkIndex == declarator.getNumTypeObjects();
158 unsigned getCurrentChunkIndex() const {
162 void setCurrentChunkIndex(unsigned idx) {
163 assert(idx <= declarator.getNumTypeObjects());
167 AttributeList *&getCurrentAttrListRef() const {
168 if (isProcessingDeclSpec())
169 return getMutableDeclSpec().getAttributes().getListRef();
170 return declarator.getTypeObject(chunkIndex).getAttrListRef();
173 /// Save the current set of attributes on the DeclSpec.
174 void saveDeclSpecAttrs() {
175 // Don't try to save them multiple times.
176 if (hasSavedAttrs) return;
178 DeclSpec &spec = getMutableDeclSpec();
179 for (AttributeList *attr = spec.getAttributes().getList(); attr;
180 attr = attr->getNext())
181 savedAttrs.push_back(attr);
182 trivial &= savedAttrs.empty();
183 hasSavedAttrs = true;
186 /// Record that we had nowhere to put the given type attribute.
187 /// We will diagnose such attributes later.
188 void addIgnoredTypeAttr(AttributeList &attr) {
189 ignoredTypeAttrs.push_back(&attr);
192 /// Diagnose all the ignored type attributes, given that the
193 /// declarator worked out to the given type.
194 void diagnoseIgnoredTypeAttrs(QualType type) const {
195 for (SmallVectorImpl<AttributeList*>::const_iterator
196 i = ignoredTypeAttrs.begin(), e = ignoredTypeAttrs.end();
198 diagnoseBadTypeAttribute(getSema(), **i, type);
201 ~TypeProcessingState() {
204 restoreDeclSpecAttrs();
208 DeclSpec &getMutableDeclSpec() const {
209 return const_cast<DeclSpec&>(declarator.getDeclSpec());
212 void restoreDeclSpecAttrs() {
213 assert(hasSavedAttrs);
215 if (savedAttrs.empty()) {
216 getMutableDeclSpec().getAttributes().set(0);
220 getMutableDeclSpec().getAttributes().set(savedAttrs[0]);
221 for (unsigned i = 0, e = savedAttrs.size() - 1; i != e; ++i)
222 savedAttrs[i]->setNext(savedAttrs[i+1]);
223 savedAttrs.back()->setNext(0);
227 /// Basically std::pair except that we really want to avoid an
228 /// implicit operator= for safety concerns. It's also a minor
229 /// link-time optimization for this to be a private type.
232 AttributeList &first;
234 /// The head of the list the attribute is currently in.
235 AttributeList *&second;
237 AttrAndList(AttributeList &attr, AttributeList *&head)
238 : first(attr), second(head) {}
243 template <> struct isPodLike<AttrAndList> {
244 static const bool value = true;
248 static void spliceAttrIntoList(AttributeList &attr, AttributeList *&head) {
253 static void spliceAttrOutOfList(AttributeList &attr, AttributeList *&head) {
255 head = attr.getNext();
259 AttributeList *cur = head;
261 assert(cur && cur->getNext() && "ran out of attrs?");
262 if (cur->getNext() == &attr) {
263 cur->setNext(attr.getNext());
266 cur = cur->getNext();
270 static void moveAttrFromListToList(AttributeList &attr,
271 AttributeList *&fromList,
272 AttributeList *&toList) {
273 spliceAttrOutOfList(attr, fromList);
274 spliceAttrIntoList(attr, toList);
277 /// The location of a type attribute.
278 enum TypeAttrLocation {
279 /// The attribute is in the decl-specifier-seq.
281 /// The attribute is part of a DeclaratorChunk.
283 /// The attribute is immediately after the declaration's name.
287 static void processTypeAttrs(TypeProcessingState &state,
288 QualType &type, TypeAttrLocation TAL,
289 AttributeList *attrs);
291 static bool handleFunctionTypeAttr(TypeProcessingState &state,
295 static bool handleObjCGCTypeAttr(TypeProcessingState &state,
296 AttributeList &attr, QualType &type);
298 static bool handleObjCOwnershipTypeAttr(TypeProcessingState &state,
299 AttributeList &attr, QualType &type);
301 static bool handleObjCPointerTypeAttr(TypeProcessingState &state,
302 AttributeList &attr, QualType &type) {
303 if (attr.getKind() == AttributeList::AT_ObjCGC)
304 return handleObjCGCTypeAttr(state, attr, type);
305 assert(attr.getKind() == AttributeList::AT_ObjCOwnership);
306 return handleObjCOwnershipTypeAttr(state, attr, type);
309 /// Given the index of a declarator chunk, check whether that chunk
310 /// directly specifies the return type of a function and, if so, find
311 /// an appropriate place for it.
313 /// \param i - a notional index which the search will start
314 /// immediately inside
315 static DeclaratorChunk *maybeMovePastReturnType(Declarator &declarator,
317 assert(i <= declarator.getNumTypeObjects());
319 DeclaratorChunk *result = 0;
321 // First, look inwards past parens for a function declarator.
322 for (; i != 0; --i) {
323 DeclaratorChunk &fnChunk = declarator.getTypeObject(i-1);
324 switch (fnChunk.Kind) {
325 case DeclaratorChunk::Paren:
328 // If we find anything except a function, bail out.
329 case DeclaratorChunk::Pointer:
330 case DeclaratorChunk::BlockPointer:
331 case DeclaratorChunk::Array:
332 case DeclaratorChunk::Reference:
333 case DeclaratorChunk::MemberPointer:
336 // If we do find a function declarator, scan inwards from that,
337 // looking for a block-pointer declarator.
338 case DeclaratorChunk::Function:
339 for (--i; i != 0; --i) {
340 DeclaratorChunk &blockChunk = declarator.getTypeObject(i-1);
341 switch (blockChunk.Kind) {
342 case DeclaratorChunk::Paren:
343 case DeclaratorChunk::Pointer:
344 case DeclaratorChunk::Array:
345 case DeclaratorChunk::Function:
346 case DeclaratorChunk::Reference:
347 case DeclaratorChunk::MemberPointer:
349 case DeclaratorChunk::BlockPointer:
350 result = &blockChunk;
353 llvm_unreachable("bad declarator chunk kind");
356 // If we run out of declarators doing that, we're done.
359 llvm_unreachable("bad declarator chunk kind");
361 // Okay, reconsider from our new point.
365 // Ran out of chunks, bail out.
369 /// Given that an objc_gc attribute was written somewhere on a
370 /// declaration *other* than on the declarator itself (for which, use
371 /// distributeObjCPointerTypeAttrFromDeclarator), and given that it
372 /// didn't apply in whatever position it was written in, try to move
373 /// it to a more appropriate position.
374 static void distributeObjCPointerTypeAttr(TypeProcessingState &state,
377 Declarator &declarator = state.getDeclarator();
379 // Move it to the outermost normal or block pointer declarator.
380 for (unsigned i = state.getCurrentChunkIndex(); i != 0; --i) {
381 DeclaratorChunk &chunk = declarator.getTypeObject(i-1);
382 switch (chunk.Kind) {
383 case DeclaratorChunk::Pointer:
384 case DeclaratorChunk::BlockPointer: {
385 // But don't move an ARC ownership attribute to the return type
387 DeclaratorChunk *destChunk = 0;
388 if (state.isProcessingDeclSpec() &&
389 attr.getKind() == AttributeList::AT_ObjCOwnership)
390 destChunk = maybeMovePastReturnType(declarator, i - 1);
391 if (!destChunk) destChunk = &chunk;
393 moveAttrFromListToList(attr, state.getCurrentAttrListRef(),
394 destChunk->getAttrListRef());
398 case DeclaratorChunk::Paren:
399 case DeclaratorChunk::Array:
402 // We may be starting at the return type of a block.
403 case DeclaratorChunk::Function:
404 if (state.isProcessingDeclSpec() &&
405 attr.getKind() == AttributeList::AT_ObjCOwnership) {
406 if (DeclaratorChunk *dest = maybeMovePastReturnType(declarator, i)) {
407 moveAttrFromListToList(attr, state.getCurrentAttrListRef(),
408 dest->getAttrListRef());
414 // Don't walk through these.
415 case DeclaratorChunk::Reference:
416 case DeclaratorChunk::MemberPointer:
422 diagnoseBadTypeAttribute(state.getSema(), attr, type);
425 /// Distribute an objc_gc type attribute that was written on the
428 distributeObjCPointerTypeAttrFromDeclarator(TypeProcessingState &state,
430 QualType &declSpecType) {
431 Declarator &declarator = state.getDeclarator();
433 // objc_gc goes on the innermost pointer to something that's not a
435 unsigned innermost = -1U;
436 bool considerDeclSpec = true;
437 for (unsigned i = 0, e = declarator.getNumTypeObjects(); i != e; ++i) {
438 DeclaratorChunk &chunk = declarator.getTypeObject(i);
439 switch (chunk.Kind) {
440 case DeclaratorChunk::Pointer:
441 case DeclaratorChunk::BlockPointer:
445 case DeclaratorChunk::Reference:
446 case DeclaratorChunk::MemberPointer:
447 case DeclaratorChunk::Paren:
448 case DeclaratorChunk::Array:
451 case DeclaratorChunk::Function:
452 considerDeclSpec = false;
458 // That might actually be the decl spec if we weren't blocked by
459 // anything in the declarator.
460 if (considerDeclSpec) {
461 if (handleObjCPointerTypeAttr(state, attr, declSpecType)) {
462 // Splice the attribute into the decl spec. Prevents the
463 // attribute from being applied multiple times and gives
464 // the source-location-filler something to work with.
465 state.saveDeclSpecAttrs();
466 moveAttrFromListToList(attr, declarator.getAttrListRef(),
467 declarator.getMutableDeclSpec().getAttributes().getListRef());
472 // Otherwise, if we found an appropriate chunk, splice the attribute
474 if (innermost != -1U) {
475 moveAttrFromListToList(attr, declarator.getAttrListRef(),
476 declarator.getTypeObject(innermost).getAttrListRef());
480 // Otherwise, diagnose when we're done building the type.
481 spliceAttrOutOfList(attr, declarator.getAttrListRef());
482 state.addIgnoredTypeAttr(attr);
485 /// A function type attribute was written somewhere in a declaration
486 /// *other* than on the declarator itself or in the decl spec. Given
487 /// that it didn't apply in whatever position it was written in, try
488 /// to move it to a more appropriate position.
489 static void distributeFunctionTypeAttr(TypeProcessingState &state,
492 Declarator &declarator = state.getDeclarator();
494 // Try to push the attribute from the return type of a function to
495 // the function itself.
496 for (unsigned i = state.getCurrentChunkIndex(); i != 0; --i) {
497 DeclaratorChunk &chunk = declarator.getTypeObject(i-1);
498 switch (chunk.Kind) {
499 case DeclaratorChunk::Function:
500 moveAttrFromListToList(attr, state.getCurrentAttrListRef(),
501 chunk.getAttrListRef());
504 case DeclaratorChunk::Paren:
505 case DeclaratorChunk::Pointer:
506 case DeclaratorChunk::BlockPointer:
507 case DeclaratorChunk::Array:
508 case DeclaratorChunk::Reference:
509 case DeclaratorChunk::MemberPointer:
514 diagnoseBadTypeAttribute(state.getSema(), attr, type);
517 /// Try to distribute a function type attribute to the innermost
518 /// function chunk or type. Returns true if the attribute was
519 /// distributed, false if no location was found.
521 distributeFunctionTypeAttrToInnermost(TypeProcessingState &state,
523 AttributeList *&attrList,
524 QualType &declSpecType) {
525 Declarator &declarator = state.getDeclarator();
527 // Put it on the innermost function chunk, if there is one.
528 for (unsigned i = 0, e = declarator.getNumTypeObjects(); i != e; ++i) {
529 DeclaratorChunk &chunk = declarator.getTypeObject(i);
530 if (chunk.Kind != DeclaratorChunk::Function) continue;
532 moveAttrFromListToList(attr, attrList, chunk.getAttrListRef());
536 if (handleFunctionTypeAttr(state, attr, declSpecType)) {
537 spliceAttrOutOfList(attr, attrList);
544 /// A function type attribute was written in the decl spec. Try to
545 /// apply it somewhere.
547 distributeFunctionTypeAttrFromDeclSpec(TypeProcessingState &state,
549 QualType &declSpecType) {
550 state.saveDeclSpecAttrs();
552 // C++11 attributes before the decl specifiers actually appertain to
553 // the declarators. Move them straight there. We don't support the
554 // 'put them wherever you like' semantics we allow for GNU attributes.
555 if (attr.isCXX11Attribute()) {
556 moveAttrFromListToList(attr, state.getCurrentAttrListRef(),
557 state.getDeclarator().getAttrListRef());
561 // Try to distribute to the innermost.
562 if (distributeFunctionTypeAttrToInnermost(state, attr,
563 state.getCurrentAttrListRef(),
567 // If that failed, diagnose the bad attribute when the declarator is
569 state.addIgnoredTypeAttr(attr);
572 /// A function type attribute was written on the declarator. Try to
573 /// apply it somewhere.
575 distributeFunctionTypeAttrFromDeclarator(TypeProcessingState &state,
577 QualType &declSpecType) {
578 Declarator &declarator = state.getDeclarator();
580 // Try to distribute to the innermost.
581 if (distributeFunctionTypeAttrToInnermost(state, attr,
582 declarator.getAttrListRef(),
586 // If that failed, diagnose the bad attribute when the declarator is
588 spliceAttrOutOfList(attr, declarator.getAttrListRef());
589 state.addIgnoredTypeAttr(attr);
592 /// \brief Given that there are attributes written on the declarator
593 /// itself, try to distribute any type attributes to the appropriate
594 /// declarator chunk.
596 /// These are attributes like the following:
599 /// but not necessarily this:
601 static void distributeTypeAttrsFromDeclarator(TypeProcessingState &state,
602 QualType &declSpecType) {
603 // Collect all the type attributes from the declarator itself.
604 assert(state.getDeclarator().getAttributes() && "declarator has no attrs!");
605 AttributeList *attr = state.getDeclarator().getAttributes();
608 next = attr->getNext();
610 // Do not distribute C++11 attributes. They have strict rules for what
611 // they appertain to.
612 if (attr->isCXX11Attribute())
615 switch (attr->getKind()) {
616 OBJC_POINTER_TYPE_ATTRS_CASELIST:
617 distributeObjCPointerTypeAttrFromDeclarator(state, *attr, declSpecType);
620 case AttributeList::AT_NSReturnsRetained:
621 if (!state.getSema().getLangOpts().ObjCAutoRefCount)
625 FUNCTION_TYPE_ATTRS_CASELIST:
626 distributeFunctionTypeAttrFromDeclarator(state, *attr, declSpecType);
632 } while ((attr = next));
635 /// Add a synthetic '()' to a block-literal declarator if it is
636 /// required, given the return type.
637 static void maybeSynthesizeBlockSignature(TypeProcessingState &state,
638 QualType declSpecType) {
639 Declarator &declarator = state.getDeclarator();
641 // First, check whether the declarator would produce a function,
642 // i.e. whether the innermost semantic chunk is a function.
643 if (declarator.isFunctionDeclarator()) {
644 // If so, make that declarator a prototyped declarator.
645 declarator.getFunctionTypeInfo().hasPrototype = true;
649 // If there are any type objects, the type as written won't name a
650 // function, regardless of the decl spec type. This is because a
651 // block signature declarator is always an abstract-declarator, and
652 // abstract-declarators can't just be parentheses chunks. Therefore
653 // we need to build a function chunk unless there are no type
654 // objects and the decl spec type is a function.
655 if (!declarator.getNumTypeObjects() && declSpecType->isFunctionType())
658 // Note that there *are* cases with invalid declarators where
659 // declarators consist solely of parentheses. In general, these
660 // occur only in failed efforts to make function declarators, so
661 // faking up the function chunk is still the right thing to do.
663 // Otherwise, we need to fake up a function declarator.
664 SourceLocation loc = declarator.getLocStart();
666 // ...and *prepend* it to the declarator.
667 SourceLocation NoLoc;
668 declarator.AddInnermostTypeInfo(DeclaratorChunk::getFunction(
670 /*IsAmbiguous=*/false,
674 /*EllipsisLoc=*/NoLoc,
677 /*RefQualifierIsLvalueRef=*/true,
678 /*RefQualifierLoc=*/NoLoc,
679 /*ConstQualifierLoc=*/NoLoc,
680 /*VolatileQualifierLoc=*/NoLoc,
681 /*MutableLoc=*/NoLoc,
685 /*ExceptionRanges=*/0,
688 loc, loc, declarator));
690 // For consistency, make sure the state still has us as processing
692 assert(state.getCurrentChunkIndex() == declarator.getNumTypeObjects() - 1);
693 state.setCurrentChunkIndex(declarator.getNumTypeObjects());
696 /// \brief Convert the specified declspec to the appropriate type
698 /// \param state Specifies the declarator containing the declaration specifier
699 /// to be converted, along with other associated processing state.
700 /// \returns The type described by the declaration specifiers. This function
701 /// never returns null.
702 static QualType ConvertDeclSpecToType(TypeProcessingState &state) {
703 // FIXME: Should move the logic from DeclSpec::Finish to here for validity
706 Sema &S = state.getSema();
707 Declarator &declarator = state.getDeclarator();
708 const DeclSpec &DS = declarator.getDeclSpec();
709 SourceLocation DeclLoc = declarator.getIdentifierLoc();
710 if (DeclLoc.isInvalid())
711 DeclLoc = DS.getLocStart();
713 ASTContext &Context = S.Context;
716 switch (DS.getTypeSpecType()) {
717 case DeclSpec::TST_void:
718 Result = Context.VoidTy;
720 case DeclSpec::TST_char:
721 if (DS.getTypeSpecSign() == DeclSpec::TSS_unspecified)
722 Result = Context.CharTy;
723 else if (DS.getTypeSpecSign() == DeclSpec::TSS_signed)
724 Result = Context.SignedCharTy;
726 assert(DS.getTypeSpecSign() == DeclSpec::TSS_unsigned &&
727 "Unknown TSS value");
728 Result = Context.UnsignedCharTy;
731 case DeclSpec::TST_wchar:
732 if (DS.getTypeSpecSign() == DeclSpec::TSS_unspecified)
733 Result = Context.WCharTy;
734 else if (DS.getTypeSpecSign() == DeclSpec::TSS_signed) {
735 S.Diag(DS.getTypeSpecSignLoc(), diag::ext_invalid_sign_spec)
736 << DS.getSpecifierName(DS.getTypeSpecType());
737 Result = Context.getSignedWCharType();
739 assert(DS.getTypeSpecSign() == DeclSpec::TSS_unsigned &&
740 "Unknown TSS value");
741 S.Diag(DS.getTypeSpecSignLoc(), diag::ext_invalid_sign_spec)
742 << DS.getSpecifierName(DS.getTypeSpecType());
743 Result = Context.getUnsignedWCharType();
746 case DeclSpec::TST_char16:
747 assert(DS.getTypeSpecSign() == DeclSpec::TSS_unspecified &&
748 "Unknown TSS value");
749 Result = Context.Char16Ty;
751 case DeclSpec::TST_char32:
752 assert(DS.getTypeSpecSign() == DeclSpec::TSS_unspecified &&
753 "Unknown TSS value");
754 Result = Context.Char32Ty;
756 case DeclSpec::TST_unspecified:
757 // "<proto1,proto2>" is an objc qualified ID with a missing id.
758 if (DeclSpec::ProtocolQualifierListTy PQ = DS.getProtocolQualifiers()) {
759 Result = Context.getObjCObjectType(Context.ObjCBuiltinIdTy,
760 (ObjCProtocolDecl*const*)PQ,
761 DS.getNumProtocolQualifiers());
762 Result = Context.getObjCObjectPointerType(Result);
766 // If this is a missing declspec in a block literal return context, then it
767 // is inferred from the return statements inside the block.
768 // The declspec is always missing in a lambda expr context; it is either
769 // specified with a trailing return type or inferred.
770 if (declarator.getContext() == Declarator::LambdaExprContext ||
771 isOmittedBlockReturnType(declarator)) {
772 Result = Context.DependentTy;
776 // Unspecified typespec defaults to int in C90. However, the C90 grammar
777 // [C90 6.5] only allows a decl-spec if there was *some* type-specifier,
778 // type-qualifier, or storage-class-specifier. If not, emit an extwarn.
779 // Note that the one exception to this is function definitions, which are
780 // allowed to be completely missing a declspec. This is handled in the
781 // parser already though by it pretending to have seen an 'int' in this
783 if (S.getLangOpts().ImplicitInt) {
784 // In C89 mode, we only warn if there is a completely missing declspec
785 // when one is not allowed.
787 S.Diag(DeclLoc, diag::ext_missing_declspec)
788 << DS.getSourceRange()
789 << FixItHint::CreateInsertion(DS.getLocStart(), "int");
791 } else if (!DS.hasTypeSpecifier()) {
792 // C99 and C++ require a type specifier. For example, C99 6.7.2p2 says:
793 // "At least one type specifier shall be given in the declaration
794 // specifiers in each declaration, and in the specifier-qualifier list in
795 // each struct declaration and type name."
796 if (S.getLangOpts().CPlusPlus) {
797 S.Diag(DeclLoc, diag::err_missing_type_specifier)
798 << DS.getSourceRange();
800 // When this occurs in C++ code, often something is very broken with the
801 // value being declared, poison it as invalid so we don't get chains of
803 declarator.setInvalidType(true);
805 S.Diag(DeclLoc, diag::ext_missing_type_specifier)
806 << DS.getSourceRange();
811 case DeclSpec::TST_int: {
812 if (DS.getTypeSpecSign() != DeclSpec::TSS_unsigned) {
813 switch (DS.getTypeSpecWidth()) {
814 case DeclSpec::TSW_unspecified: Result = Context.IntTy; break;
815 case DeclSpec::TSW_short: Result = Context.ShortTy; break;
816 case DeclSpec::TSW_long: Result = Context.LongTy; break;
817 case DeclSpec::TSW_longlong:
818 Result = Context.LongLongTy;
820 // 'long long' is a C99 or C++11 feature.
821 if (!S.getLangOpts().C99) {
822 if (S.getLangOpts().CPlusPlus)
823 S.Diag(DS.getTypeSpecWidthLoc(),
824 S.getLangOpts().CPlusPlus11 ?
825 diag::warn_cxx98_compat_longlong : diag::ext_cxx11_longlong);
827 S.Diag(DS.getTypeSpecWidthLoc(), diag::ext_c99_longlong);
832 switch (DS.getTypeSpecWidth()) {
833 case DeclSpec::TSW_unspecified: Result = Context.UnsignedIntTy; break;
834 case DeclSpec::TSW_short: Result = Context.UnsignedShortTy; break;
835 case DeclSpec::TSW_long: Result = Context.UnsignedLongTy; break;
836 case DeclSpec::TSW_longlong:
837 Result = Context.UnsignedLongLongTy;
839 // 'long long' is a C99 or C++11 feature.
840 if (!S.getLangOpts().C99) {
841 if (S.getLangOpts().CPlusPlus)
842 S.Diag(DS.getTypeSpecWidthLoc(),
843 S.getLangOpts().CPlusPlus11 ?
844 diag::warn_cxx98_compat_longlong : diag::ext_cxx11_longlong);
846 S.Diag(DS.getTypeSpecWidthLoc(), diag::ext_c99_longlong);
853 case DeclSpec::TST_int128:
854 if (!S.PP.getTargetInfo().hasInt128Type())
855 S.Diag(DS.getTypeSpecTypeLoc(), diag::err_int128_unsupported);
856 if (DS.getTypeSpecSign() == DeclSpec::TSS_unsigned)
857 Result = Context.UnsignedInt128Ty;
859 Result = Context.Int128Ty;
861 case DeclSpec::TST_half: Result = Context.HalfTy; break;
862 case DeclSpec::TST_float: Result = Context.FloatTy; break;
863 case DeclSpec::TST_double:
864 if (DS.getTypeSpecWidth() == DeclSpec::TSW_long)
865 Result = Context.LongDoubleTy;
867 Result = Context.DoubleTy;
869 if (S.getLangOpts().OpenCL && !S.getOpenCLOptions().cl_khr_fp64) {
870 S.Diag(DS.getTypeSpecTypeLoc(), diag::err_double_requires_fp64);
871 declarator.setInvalidType(true);
874 case DeclSpec::TST_bool: Result = Context.BoolTy; break; // _Bool or bool
875 case DeclSpec::TST_decimal32: // _Decimal32
876 case DeclSpec::TST_decimal64: // _Decimal64
877 case DeclSpec::TST_decimal128: // _Decimal128
878 S.Diag(DS.getTypeSpecTypeLoc(), diag::err_decimal_unsupported);
879 Result = Context.IntTy;
880 declarator.setInvalidType(true);
882 case DeclSpec::TST_class:
883 case DeclSpec::TST_enum:
884 case DeclSpec::TST_union:
885 case DeclSpec::TST_struct:
886 case DeclSpec::TST_interface: {
887 TypeDecl *D = dyn_cast_or_null<TypeDecl>(DS.getRepAsDecl());
889 // This can happen in C++ with ambiguous lookups.
890 Result = Context.IntTy;
891 declarator.setInvalidType(true);
895 // If the type is deprecated or unavailable, diagnose it.
896 S.DiagnoseUseOfDecl(D, DS.getTypeSpecTypeNameLoc());
898 assert(DS.getTypeSpecWidth() == 0 && DS.getTypeSpecComplex() == 0 &&
899 DS.getTypeSpecSign() == 0 && "No qualifiers on tag names!");
901 // TypeQuals handled by caller.
902 Result = Context.getTypeDeclType(D);
904 // In both C and C++, make an ElaboratedType.
905 ElaboratedTypeKeyword Keyword
906 = ElaboratedType::getKeywordForTypeSpec(DS.getTypeSpecType());
907 Result = S.getElaboratedType(Keyword, DS.getTypeSpecScope(), Result);
910 case DeclSpec::TST_typename: {
911 assert(DS.getTypeSpecWidth() == 0 && DS.getTypeSpecComplex() == 0 &&
912 DS.getTypeSpecSign() == 0 &&
913 "Can't handle qualifiers on typedef names yet!");
914 Result = S.GetTypeFromParser(DS.getRepAsType());
916 declarator.setInvalidType(true);
917 else if (DeclSpec::ProtocolQualifierListTy PQ
918 = DS.getProtocolQualifiers()) {
919 if (const ObjCObjectType *ObjT = Result->getAs<ObjCObjectType>()) {
920 // Silently drop any existing protocol qualifiers.
921 // TODO: determine whether that's the right thing to do.
922 if (ObjT->getNumProtocols())
923 Result = ObjT->getBaseType();
925 if (DS.getNumProtocolQualifiers())
926 Result = Context.getObjCObjectType(Result,
927 (ObjCProtocolDecl*const*) PQ,
928 DS.getNumProtocolQualifiers());
929 } else if (Result->isObjCIdType()) {
931 Result = Context.getObjCObjectType(Context.ObjCBuiltinIdTy,
932 (ObjCProtocolDecl*const*) PQ,
933 DS.getNumProtocolQualifiers());
934 Result = Context.getObjCObjectPointerType(Result);
935 } else if (Result->isObjCClassType()) {
936 // Class<protocol-list>
937 Result = Context.getObjCObjectType(Context.ObjCBuiltinClassTy,
938 (ObjCProtocolDecl*const*) PQ,
939 DS.getNumProtocolQualifiers());
940 Result = Context.getObjCObjectPointerType(Result);
942 S.Diag(DeclLoc, diag::err_invalid_protocol_qualifiers)
943 << DS.getSourceRange();
944 declarator.setInvalidType(true);
948 // TypeQuals handled by caller.
951 case DeclSpec::TST_typeofType:
952 // FIXME: Preserve type source info.
953 Result = S.GetTypeFromParser(DS.getRepAsType());
954 assert(!Result.isNull() && "Didn't get a type for typeof?");
955 if (!Result->isDependentType())
956 if (const TagType *TT = Result->getAs<TagType>())
957 S.DiagnoseUseOfDecl(TT->getDecl(), DS.getTypeSpecTypeLoc());
958 // TypeQuals handled by caller.
959 Result = Context.getTypeOfType(Result);
961 case DeclSpec::TST_typeofExpr: {
962 Expr *E = DS.getRepAsExpr();
963 assert(E && "Didn't get an expression for typeof?");
964 // TypeQuals handled by caller.
965 Result = S.BuildTypeofExprType(E, DS.getTypeSpecTypeLoc());
966 if (Result.isNull()) {
967 Result = Context.IntTy;
968 declarator.setInvalidType(true);
972 case DeclSpec::TST_decltype: {
973 Expr *E = DS.getRepAsExpr();
974 assert(E && "Didn't get an expression for decltype?");
975 // TypeQuals handled by caller.
976 Result = S.BuildDecltypeType(E, DS.getTypeSpecTypeLoc());
977 if (Result.isNull()) {
978 Result = Context.IntTy;
979 declarator.setInvalidType(true);
983 case DeclSpec::TST_underlyingType:
984 Result = S.GetTypeFromParser(DS.getRepAsType());
985 assert(!Result.isNull() && "Didn't get a type for __underlying_type?");
986 Result = S.BuildUnaryTransformType(Result,
987 UnaryTransformType::EnumUnderlyingType,
988 DS.getTypeSpecTypeLoc());
989 if (Result.isNull()) {
990 Result = Context.IntTy;
991 declarator.setInvalidType(true);
995 case DeclSpec::TST_auto:
996 // TypeQuals handled by caller.
997 Result = Context.getAutoType(QualType(), /*decltype(auto)*/false);
1000 case DeclSpec::TST_decltype_auto:
1001 Result = Context.getAutoType(QualType(), /*decltype(auto)*/true);
1004 case DeclSpec::TST_unknown_anytype:
1005 Result = Context.UnknownAnyTy;
1008 case DeclSpec::TST_atomic:
1009 Result = S.GetTypeFromParser(DS.getRepAsType());
1010 assert(!Result.isNull() && "Didn't get a type for _Atomic?");
1011 Result = S.BuildAtomicType(Result, DS.getTypeSpecTypeLoc());
1012 if (Result.isNull()) {
1013 Result = Context.IntTy;
1014 declarator.setInvalidType(true);
1018 case DeclSpec::TST_image1d_t:
1019 Result = Context.OCLImage1dTy;
1022 case DeclSpec::TST_image1d_array_t:
1023 Result = Context.OCLImage1dArrayTy;
1026 case DeclSpec::TST_image1d_buffer_t:
1027 Result = Context.OCLImage1dBufferTy;
1030 case DeclSpec::TST_image2d_t:
1031 Result = Context.OCLImage2dTy;
1034 case DeclSpec::TST_image2d_array_t:
1035 Result = Context.OCLImage2dArrayTy;
1038 case DeclSpec::TST_image3d_t:
1039 Result = Context.OCLImage3dTy;
1042 case DeclSpec::TST_sampler_t:
1043 Result = Context.OCLSamplerTy;
1046 case DeclSpec::TST_event_t:
1047 Result = Context.OCLEventTy;
1050 case DeclSpec::TST_error:
1051 Result = Context.IntTy;
1052 declarator.setInvalidType(true);
1056 // Handle complex types.
1057 if (DS.getTypeSpecComplex() == DeclSpec::TSC_complex) {
1058 if (S.getLangOpts().Freestanding)
1059 S.Diag(DS.getTypeSpecComplexLoc(), diag::ext_freestanding_complex);
1060 Result = Context.getComplexType(Result);
1061 } else if (DS.isTypeAltiVecVector()) {
1062 unsigned typeSize = static_cast<unsigned>(Context.getTypeSize(Result));
1063 assert(typeSize > 0 && "type size for vector must be greater than 0 bits");
1064 VectorType::VectorKind VecKind = VectorType::AltiVecVector;
1065 if (DS.isTypeAltiVecPixel())
1066 VecKind = VectorType::AltiVecPixel;
1067 else if (DS.isTypeAltiVecBool())
1068 VecKind = VectorType::AltiVecBool;
1069 Result = Context.getVectorType(Result, 128/typeSize, VecKind);
1072 // FIXME: Imaginary.
1073 if (DS.getTypeSpecComplex() == DeclSpec::TSC_imaginary)
1074 S.Diag(DS.getTypeSpecComplexLoc(), diag::err_imaginary_not_supported);
1076 // Before we process any type attributes, synthesize a block literal
1077 // function declarator if necessary.
1078 if (declarator.getContext() == Declarator::BlockLiteralContext)
1079 maybeSynthesizeBlockSignature(state, Result);
1081 // Apply any type attributes from the decl spec. This may cause the
1082 // list of type attributes to be temporarily saved while the type
1083 // attributes are pushed around.
1084 if (AttributeList *attrs = DS.getAttributes().getList())
1085 processTypeAttrs(state, Result, TAL_DeclSpec, attrs);
1087 // Apply const/volatile/restrict qualifiers to T.
1088 if (unsigned TypeQuals = DS.getTypeQualifiers()) {
1090 // Warn about CV qualifiers on functions: C99 6.7.3p8: "If the specification
1091 // of a function type includes any type qualifiers, the behavior is
1093 if (Result->isFunctionType() && TypeQuals) {
1094 if (TypeQuals & DeclSpec::TQ_const)
1095 S.Diag(DS.getConstSpecLoc(), diag::warn_typecheck_function_qualifiers)
1096 << Result << DS.getSourceRange();
1097 else if (TypeQuals & DeclSpec::TQ_volatile)
1098 S.Diag(DS.getVolatileSpecLoc(), diag::warn_typecheck_function_qualifiers)
1099 << Result << DS.getSourceRange();
1101 assert((TypeQuals & (DeclSpec::TQ_restrict | DeclSpec::TQ_atomic)) &&
1102 "Has CVRA quals but not C, V, R, or A?");
1103 // No diagnostic; we'll diagnose 'restrict' or '_Atomic' applied to a
1104 // function type later, in BuildQualifiedType.
1109 // Cv-qualified references are ill-formed except when the
1110 // cv-qualifiers are introduced through the use of a typedef
1111 // (7.1.3) or of a template type argument (14.3), in which
1112 // case the cv-qualifiers are ignored.
1113 // FIXME: Shouldn't we be checking SCS_typedef here?
1114 if (DS.getTypeSpecType() == DeclSpec::TST_typename &&
1115 TypeQuals && Result->isReferenceType()) {
1116 TypeQuals &= ~DeclSpec::TQ_const;
1117 TypeQuals &= ~DeclSpec::TQ_volatile;
1118 TypeQuals &= ~DeclSpec::TQ_atomic;
1121 // C90 6.5.3 constraints: "The same type qualifier shall not appear more
1122 // than once in the same specifier-list or qualifier-list, either directly
1123 // or via one or more typedefs."
1124 if (!S.getLangOpts().C99 && !S.getLangOpts().CPlusPlus
1125 && TypeQuals & Result.getCVRQualifiers()) {
1126 if (TypeQuals & DeclSpec::TQ_const && Result.isConstQualified()) {
1127 S.Diag(DS.getConstSpecLoc(), diag::ext_duplicate_declspec)
1131 if (TypeQuals & DeclSpec::TQ_volatile && Result.isVolatileQualified()) {
1132 S.Diag(DS.getVolatileSpecLoc(), diag::ext_duplicate_declspec)
1136 // C90 doesn't have restrict nor _Atomic, so it doesn't force us to
1137 // produce a warning in this case.
1140 QualType Qualified = S.BuildQualifiedType(Result, DeclLoc, TypeQuals, &DS);
1142 // If adding qualifiers fails, just use the unqualified type.
1143 if (Qualified.isNull())
1144 declarator.setInvalidType(true);
1152 static std::string getPrintableNameForEntity(DeclarationName Entity) {
1154 return Entity.getAsString();
1159 QualType Sema::BuildQualifiedType(QualType T, SourceLocation Loc,
1160 Qualifiers Qs, const DeclSpec *DS) {
1161 // Enforce C99 6.7.3p2: "Types other than pointer types derived from
1162 // object or incomplete types shall not be restrict-qualified."
1163 if (Qs.hasRestrict()) {
1164 unsigned DiagID = 0;
1167 if (T->isAnyPointerType() || T->isReferenceType() ||
1168 T->isMemberPointerType()) {
1170 if (T->isObjCObjectPointerType())
1172 else if (const MemberPointerType *PTy = T->getAs<MemberPointerType>())
1173 EltTy = PTy->getPointeeType();
1175 EltTy = T->getPointeeType();
1177 // If we have a pointer or reference, the pointee must have an object
1179 if (!EltTy->isIncompleteOrObjectType()) {
1180 DiagID = diag::err_typecheck_invalid_restrict_invalid_pointee;
1183 } else if (!T->isDependentType()) {
1184 DiagID = diag::err_typecheck_invalid_restrict_not_pointer;
1189 Diag(DS ? DS->getRestrictSpecLoc() : Loc, DiagID) << ProblemTy;
1190 Qs.removeRestrict();
1194 return Context.getQualifiedType(T, Qs);
1197 QualType Sema::BuildQualifiedType(QualType T, SourceLocation Loc,
1198 unsigned CVRA, const DeclSpec *DS) {
1199 // Convert from DeclSpec::TQ to Qualifiers::TQ by just dropping TQ_atomic.
1200 unsigned CVR = CVRA & ~DeclSpec::TQ_atomic;
1203 // If the same qualifier appears more than once in the same
1204 // specifier-qualifier-list, either directly or via one or more typedefs,
1205 // the behavior is the same as if it appeared only once.
1207 // It's not specified what happens when the _Atomic qualifier is applied to
1208 // a type specified with the _Atomic specifier, but we assume that this
1209 // should be treated as if the _Atomic qualifier appeared multiple times.
1210 if (CVRA & DeclSpec::TQ_atomic && !T->isAtomicType()) {
1212 // If other qualifiers appear along with the _Atomic qualifier in a
1213 // specifier-qualifier-list, the resulting type is the so-qualified
1216 // Don't need to worry about array types here, since _Atomic can't be
1217 // applied to such types.
1218 SplitQualType Split = T.getSplitUnqualifiedType();
1219 T = BuildAtomicType(QualType(Split.Ty, 0),
1220 DS ? DS->getAtomicSpecLoc() : Loc);
1223 Split.Quals.addCVRQualifiers(CVR);
1224 return BuildQualifiedType(T, Loc, Split.Quals);
1227 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR), DS);
1230 /// \brief Build a paren type including \p T.
1231 QualType Sema::BuildParenType(QualType T) {
1232 return Context.getParenType(T);
1235 /// Given that we're building a pointer or reference to the given
1236 static QualType inferARCLifetimeForPointee(Sema &S, QualType type,
1239 // Bail out if retention is unrequired or already specified.
1240 if (!type->isObjCLifetimeType() ||
1241 type.getObjCLifetime() != Qualifiers::OCL_None)
1244 Qualifiers::ObjCLifetime implicitLifetime = Qualifiers::OCL_None;
1246 // If the object type is const-qualified, we can safely use
1247 // __unsafe_unretained. This is safe (because there are no read
1248 // barriers), and it'll be safe to coerce anything but __weak* to
1249 // the resulting type.
1250 if (type.isConstQualified()) {
1251 implicitLifetime = Qualifiers::OCL_ExplicitNone;
1253 // Otherwise, check whether the static type does not require
1254 // retaining. This currently only triggers for Class (possibly
1255 // protocol-qualifed, and arrays thereof).
1256 } else if (type->isObjCARCImplicitlyUnretainedType()) {
1257 implicitLifetime = Qualifiers::OCL_ExplicitNone;
1259 // If we are in an unevaluated context, like sizeof, skip adding a
1261 } else if (S.isUnevaluatedContext()) {
1264 // If that failed, give an error and recover using __strong. __strong
1265 // is the option most likely to prevent spurious second-order diagnostics,
1266 // like when binding a reference to a field.
1268 // These types can show up in private ivars in system headers, so
1269 // we need this to not be an error in those cases. Instead we
1271 if (S.DelayedDiagnostics.shouldDelayDiagnostics()) {
1272 S.DelayedDiagnostics.add(
1273 sema::DelayedDiagnostic::makeForbiddenType(loc,
1274 diag::err_arc_indirect_no_ownership, type, isReference));
1276 S.Diag(loc, diag::err_arc_indirect_no_ownership) << type << isReference;
1278 implicitLifetime = Qualifiers::OCL_Strong;
1280 assert(implicitLifetime && "didn't infer any lifetime!");
1283 qs.addObjCLifetime(implicitLifetime);
1284 return S.Context.getQualifiedType(type, qs);
1287 /// \brief Build a pointer type.
1289 /// \param T The type to which we'll be building a pointer.
1291 /// \param Loc The location of the entity whose type involves this
1292 /// pointer type or, if there is no such entity, the location of the
1293 /// type that will have pointer type.
1295 /// \param Entity The name of the entity that involves the pointer
1298 /// \returns A suitable pointer type, if there are no
1299 /// errors. Otherwise, returns a NULL type.
1300 QualType Sema::BuildPointerType(QualType T,
1301 SourceLocation Loc, DeclarationName Entity) {
1302 if (T->isReferenceType()) {
1303 // C++ 8.3.2p4: There shall be no ... pointers to references ...
1304 Diag(Loc, diag::err_illegal_decl_pointer_to_reference)
1305 << getPrintableNameForEntity(Entity) << T;
1309 assert(!T->isObjCObjectType() && "Should build ObjCObjectPointerType");
1311 // In ARC, it is forbidden to build pointers to unqualified pointers.
1312 if (getLangOpts().ObjCAutoRefCount)
1313 T = inferARCLifetimeForPointee(*this, T, Loc, /*reference*/ false);
1315 // Build the pointer type.
1316 return Context.getPointerType(T);
1319 /// \brief Build a reference type.
1321 /// \param T The type to which we'll be building a reference.
1323 /// \param Loc The location of the entity whose type involves this
1324 /// reference type or, if there is no such entity, the location of the
1325 /// type that will have reference type.
1327 /// \param Entity The name of the entity that involves the reference
1330 /// \returns A suitable reference type, if there are no
1331 /// errors. Otherwise, returns a NULL type.
1332 QualType Sema::BuildReferenceType(QualType T, bool SpelledAsLValue,
1334 DeclarationName Entity) {
1335 assert(Context.getCanonicalType(T) != Context.OverloadTy &&
1336 "Unresolved overloaded function type");
1338 // C++0x [dcl.ref]p6:
1339 // If a typedef (7.1.3), a type template-parameter (14.3.1), or a
1340 // decltype-specifier (7.1.6.2) denotes a type TR that is a reference to a
1341 // type T, an attempt to create the type "lvalue reference to cv TR" creates
1342 // the type "lvalue reference to T", while an attempt to create the type
1343 // "rvalue reference to cv TR" creates the type TR.
1344 bool LValueRef = SpelledAsLValue || T->getAs<LValueReferenceType>();
1346 // C++ [dcl.ref]p4: There shall be no references to references.
1348 // According to C++ DR 106, references to references are only
1349 // diagnosed when they are written directly (e.g., "int & &"),
1350 // but not when they happen via a typedef:
1352 // typedef int& intref;
1353 // typedef intref& intref2;
1355 // Parser::ParseDeclaratorInternal diagnoses the case where
1356 // references are written directly; here, we handle the
1357 // collapsing of references-to-references as described in C++0x.
1358 // DR 106 and 540 introduce reference-collapsing into C++98/03.
1361 // A declarator that specifies the type "reference to cv void"
1363 if (T->isVoidType()) {
1364 Diag(Loc, diag::err_reference_to_void);
1368 // In ARC, it is forbidden to build references to unqualified pointers.
1369 if (getLangOpts().ObjCAutoRefCount)
1370 T = inferARCLifetimeForPointee(*this, T, Loc, /*reference*/ true);
1372 // Handle restrict on references.
1374 return Context.getLValueReferenceType(T, SpelledAsLValue);
1375 return Context.getRValueReferenceType(T);
1378 /// Check whether the specified array size makes the array type a VLA. If so,
1379 /// return true, if not, return the size of the array in SizeVal.
1380 static bool isArraySizeVLA(Sema &S, Expr *ArraySize, llvm::APSInt &SizeVal) {
1381 // If the size is an ICE, it certainly isn't a VLA. If we're in a GNU mode
1382 // (like gnu99, but not c99) accept any evaluatable value as an extension.
1383 class VLADiagnoser : public Sema::VerifyICEDiagnoser {
1385 VLADiagnoser() : Sema::VerifyICEDiagnoser(true) {}
1387 virtual void diagnoseNotICE(Sema &S, SourceLocation Loc, SourceRange SR) {
1390 virtual void diagnoseFold(Sema &S, SourceLocation Loc, SourceRange SR) {
1391 S.Diag(Loc, diag::ext_vla_folded_to_constant) << SR;
1395 return S.VerifyIntegerConstantExpression(ArraySize, &SizeVal, Diagnoser,
1396 S.LangOpts.GNUMode).isInvalid();
1400 /// \brief Build an array type.
1402 /// \param T The type of each element in the array.
1404 /// \param ASM C99 array size modifier (e.g., '*', 'static').
1406 /// \param ArraySize Expression describing the size of the array.
1408 /// \param Brackets The range from the opening '[' to the closing ']'.
1410 /// \param Entity The name of the entity that involves the array
1413 /// \returns A suitable array type, if there are no errors. Otherwise,
1414 /// returns a NULL type.
1415 QualType Sema::BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM,
1416 Expr *ArraySize, unsigned Quals,
1417 SourceRange Brackets, DeclarationName Entity) {
1419 SourceLocation Loc = Brackets.getBegin();
1420 if (getLangOpts().CPlusPlus) {
1421 // C++ [dcl.array]p1:
1422 // T is called the array element type; this type shall not be a reference
1423 // type, the (possibly cv-qualified) type void, a function type or an
1424 // abstract class type.
1426 // C++ [dcl.array]p3:
1427 // When several "array of" specifications are adjacent, [...] only the
1428 // first of the constant expressions that specify the bounds of the arrays
1431 // Note: function types are handled in the common path with C.
1432 if (T->isReferenceType()) {
1433 Diag(Loc, diag::err_illegal_decl_array_of_references)
1434 << getPrintableNameForEntity(Entity) << T;
1438 if (T->isVoidType() || T->isIncompleteArrayType()) {
1439 Diag(Loc, diag::err_illegal_decl_array_incomplete_type) << T;
1443 if (RequireNonAbstractType(Brackets.getBegin(), T,
1444 diag::err_array_of_abstract_type))
1448 // C99 6.7.5.2p1: If the element type is an incomplete or function type,
1449 // reject it (e.g. void ary[7], struct foo ary[7], void ary[7]())
1450 if (RequireCompleteType(Loc, T,
1451 diag::err_illegal_decl_array_incomplete_type))
1455 if (T->isFunctionType()) {
1456 Diag(Loc, diag::err_illegal_decl_array_of_functions)
1457 << getPrintableNameForEntity(Entity) << T;
1461 if (const RecordType *EltTy = T->getAs<RecordType>()) {
1462 // If the element type is a struct or union that contains a variadic
1463 // array, accept it as a GNU extension: C99 6.7.2.1p2.
1464 if (EltTy->getDecl()->hasFlexibleArrayMember())
1465 Diag(Loc, diag::ext_flexible_array_in_array) << T;
1466 } else if (T->isObjCObjectType()) {
1467 Diag(Loc, diag::err_objc_array_of_interfaces) << T;
1471 // Do placeholder conversions on the array size expression.
1472 if (ArraySize && ArraySize->hasPlaceholderType()) {
1473 ExprResult Result = CheckPlaceholderExpr(ArraySize);
1474 if (Result.isInvalid()) return QualType();
1475 ArraySize = Result.take();
1478 // Do lvalue-to-rvalue conversions on the array size expression.
1479 if (ArraySize && !ArraySize->isRValue()) {
1480 ExprResult Result = DefaultLvalueConversion(ArraySize);
1481 if (Result.isInvalid())
1484 ArraySize = Result.take();
1487 // C99 6.7.5.2p1: The size expression shall have integer type.
1488 // C++11 allows contextual conversions to such types.
1489 if (!getLangOpts().CPlusPlus11 &&
1490 ArraySize && !ArraySize->isTypeDependent() &&
1491 !ArraySize->getType()->isIntegralOrUnscopedEnumerationType()) {
1492 Diag(ArraySize->getLocStart(), diag::err_array_size_non_int)
1493 << ArraySize->getType() << ArraySize->getSourceRange();
1497 llvm::APSInt ConstVal(Context.getTypeSize(Context.getSizeType()));
1499 if (ASM == ArrayType::Star)
1500 T = Context.getVariableArrayType(T, 0, ASM, Quals, Brackets);
1502 T = Context.getIncompleteArrayType(T, ASM, Quals);
1503 } else if (ArraySize->isTypeDependent() || ArraySize->isValueDependent()) {
1504 T = Context.getDependentSizedArrayType(T, ArraySize, ASM, Quals, Brackets);
1505 } else if ((!T->isDependentType() && !T->isIncompleteType() &&
1506 !T->isConstantSizeType()) ||
1507 isArraySizeVLA(*this, ArraySize, ConstVal)) {
1508 // Even in C++11, don't allow contextual conversions in the array bound
1510 if (getLangOpts().CPlusPlus11 &&
1511 !ArraySize->getType()->isIntegralOrUnscopedEnumerationType()) {
1512 Diag(ArraySize->getLocStart(), diag::err_array_size_non_int)
1513 << ArraySize->getType() << ArraySize->getSourceRange();
1517 // C99: an array with an element type that has a non-constant-size is a VLA.
1518 // C99: an array with a non-ICE size is a VLA. We accept any expression
1519 // that we can fold to a non-zero positive value as an extension.
1520 T = Context.getVariableArrayType(T, ArraySize, ASM, Quals, Brackets);
1522 // C99 6.7.5.2p1: If the expression is a constant expression, it shall
1523 // have a value greater than zero.
1524 if (ConstVal.isSigned() && ConstVal.isNegative()) {
1526 Diag(ArraySize->getLocStart(), diag::err_decl_negative_array_size)
1527 << getPrintableNameForEntity(Entity) << ArraySize->getSourceRange();
1529 Diag(ArraySize->getLocStart(), diag::err_typecheck_negative_array_size)
1530 << ArraySize->getSourceRange();
1533 if (ConstVal == 0) {
1534 // GCC accepts zero sized static arrays. We allow them when
1535 // we're not in a SFINAE context.
1536 Diag(ArraySize->getLocStart(),
1537 isSFINAEContext()? diag::err_typecheck_zero_array_size
1538 : diag::ext_typecheck_zero_array_size)
1539 << ArraySize->getSourceRange();
1541 if (ASM == ArrayType::Static) {
1542 Diag(ArraySize->getLocStart(),
1543 diag::warn_typecheck_zero_static_array_size)
1544 << ArraySize->getSourceRange();
1545 ASM = ArrayType::Normal;
1547 } else if (!T->isDependentType() && !T->isVariablyModifiedType() &&
1548 !T->isIncompleteType()) {
1549 // Is the array too large?
1550 unsigned ActiveSizeBits
1551 = ConstantArrayType::getNumAddressingBits(Context, T, ConstVal);
1552 if (ActiveSizeBits > ConstantArrayType::getMaxSizeBits(Context))
1553 Diag(ArraySize->getLocStart(), diag::err_array_too_large)
1554 << ConstVal.toString(10)
1555 << ArraySize->getSourceRange();
1558 T = Context.getConstantArrayType(T, ConstVal, ASM, Quals);
1561 // OpenCL v1.2 s6.9.d: variable length arrays are not supported.
1562 if (getLangOpts().OpenCL && T->isVariableArrayType()) {
1563 Diag(Loc, diag::err_opencl_vla);
1566 // If this is not C99, extwarn about VLA's and C99 array size modifiers.
1567 if (!getLangOpts().C99) {
1568 if (T->isVariableArrayType()) {
1569 // Prohibit the use of non-POD types in VLAs.
1570 // FIXME: C++1y allows this.
1571 QualType BaseT = Context.getBaseElementType(T);
1572 if (!T->isDependentType() &&
1573 !BaseT.isPODType(Context) &&
1574 !BaseT->isObjCLifetimeType()) {
1575 Diag(Loc, diag::err_vla_non_pod)
1579 // Prohibit the use of VLAs during template argument deduction.
1580 else if (isSFINAEContext()) {
1581 Diag(Loc, diag::err_vla_in_sfinae);
1584 // Just extwarn about VLAs.
1586 Diag(Loc, getLangOpts().CPlusPlus1y
1587 ? diag::warn_cxx11_compat_array_of_runtime_bound
1589 } else if (ASM != ArrayType::Normal || Quals != 0)
1591 getLangOpts().CPlusPlus? diag::err_c99_array_usage_cxx
1592 : diag::ext_c99_array_usage) << ASM;
1595 if (T->isVariableArrayType()) {
1596 // Warn about VLAs for -Wvla.
1597 Diag(Loc, diag::warn_vla_used);
1603 /// \brief Build an ext-vector type.
1605 /// Run the required checks for the extended vector type.
1606 QualType Sema::BuildExtVectorType(QualType T, Expr *ArraySize,
1607 SourceLocation AttrLoc) {
1608 // unlike gcc's vector_size attribute, we do not allow vectors to be defined
1609 // in conjunction with complex types (pointers, arrays, functions, etc.).
1610 if (!T->isDependentType() &&
1611 !T->isIntegerType() && !T->isRealFloatingType()) {
1612 Diag(AttrLoc, diag::err_attribute_invalid_vector_type) << T;
1616 if (!ArraySize->isTypeDependent() && !ArraySize->isValueDependent()) {
1617 llvm::APSInt vecSize(32);
1618 if (!ArraySize->isIntegerConstantExpr(vecSize, Context)) {
1619 Diag(AttrLoc, diag::err_attribute_argument_not_int)
1620 << "ext_vector_type" << ArraySize->getSourceRange();
1624 // unlike gcc's vector_size attribute, the size is specified as the
1625 // number of elements, not the number of bytes.
1626 unsigned vectorSize = static_cast<unsigned>(vecSize.getZExtValue());
1628 if (vectorSize == 0) {
1629 Diag(AttrLoc, diag::err_attribute_zero_size)
1630 << ArraySize->getSourceRange();
1634 return Context.getExtVectorType(T, vectorSize);
1637 return Context.getDependentSizedExtVectorType(T, ArraySize, AttrLoc);
1640 QualType Sema::BuildFunctionType(QualType T,
1641 llvm::MutableArrayRef<QualType> ParamTypes,
1642 SourceLocation Loc, DeclarationName Entity,
1643 const FunctionProtoType::ExtProtoInfo &EPI) {
1644 if (T->isArrayType() || T->isFunctionType()) {
1645 Diag(Loc, diag::err_func_returning_array_function)
1646 << T->isFunctionType() << T;
1650 // Functions cannot return half FP.
1651 if (T->isHalfType()) {
1652 Diag(Loc, diag::err_parameters_retval_cannot_have_fp16_type) << 1 <<
1653 FixItHint::CreateInsertion(Loc, "*");
1657 bool Invalid = false;
1658 for (unsigned Idx = 0, Cnt = ParamTypes.size(); Idx < Cnt; ++Idx) {
1659 // FIXME: Loc is too inprecise here, should use proper locations for args.
1660 QualType ParamType = Context.getAdjustedParameterType(ParamTypes[Idx]);
1661 if (ParamType->isVoidType()) {
1662 Diag(Loc, diag::err_param_with_void_type);
1664 } else if (ParamType->isHalfType()) {
1665 // Disallow half FP arguments.
1666 Diag(Loc, diag::err_parameters_retval_cannot_have_fp16_type) << 0 <<
1667 FixItHint::CreateInsertion(Loc, "*");
1671 ParamTypes[Idx] = ParamType;
1677 return Context.getFunctionType(T, ParamTypes, EPI);
1680 /// \brief Build a member pointer type \c T Class::*.
1682 /// \param T the type to which the member pointer refers.
1683 /// \param Class the class type into which the member pointer points.
1684 /// \param Loc the location where this type begins
1685 /// \param Entity the name of the entity that will have this member pointer type
1687 /// \returns a member pointer type, if successful, or a NULL type if there was
1689 QualType Sema::BuildMemberPointerType(QualType T, QualType Class,
1691 DeclarationName Entity) {
1692 // Verify that we're not building a pointer to pointer to function with
1693 // exception specification.
1694 if (CheckDistantExceptionSpec(T)) {
1695 Diag(Loc, diag::err_distant_exception_spec);
1697 // FIXME: If we're doing this as part of template instantiation,
1698 // we should return immediately.
1700 // Build the type anyway, but use the canonical type so that the
1701 // exception specifiers are stripped off.
1702 T = Context.getCanonicalType(T);
1705 // C++ 8.3.3p3: A pointer to member shall not point to ... a member
1706 // with reference type, or "cv void."
1707 if (T->isReferenceType()) {
1708 Diag(Loc, diag::err_illegal_decl_mempointer_to_reference)
1709 << (Entity? Entity.getAsString() : "type name") << T;
1713 if (T->isVoidType()) {
1714 Diag(Loc, diag::err_illegal_decl_mempointer_to_void)
1715 << (Entity? Entity.getAsString() : "type name");
1719 if (!Class->isDependentType() && !Class->isRecordType()) {
1720 Diag(Loc, diag::err_mempointer_in_nonclass_type) << Class;
1724 // C++ allows the class type in a member pointer to be an incomplete type.
1725 // In the Microsoft ABI, the size of the member pointer can vary
1726 // according to the class type, which means that we really need a
1727 // complete type if possible, which means we need to instantiate templates.
1729 // If template instantiation fails or the type is just incomplete, we have to
1730 // add an extra slot to the member pointer. Yes, this does cause problems
1731 // when passing pointers between TUs that disagree about the size.
1732 if (Context.getTargetInfo().getCXXABI().isMicrosoft()) {
1733 CXXRecordDecl *RD = Class->getAsCXXRecordDecl();
1734 if (RD && !RD->hasAttr<MSInheritanceAttr>()) {
1735 // Lock in the inheritance model on the first use of a member pointer.
1736 // Otherwise we may disagree about the size at different points in the TU.
1737 // FIXME: MSVC picks a model on the first use that needs to know the size,
1738 // rather than on the first mention of the type, e.g. typedefs.
1739 if (RequireCompleteType(Loc, Class, 0) && !RD->isBeingDefined()) {
1740 // We know it doesn't have an attribute and it's incomplete, so use the
1741 // unspecified inheritance model. If we're in the record body, we can
1742 // figure out the inheritance model.
1743 for (CXXRecordDecl::redecl_iterator I = RD->redecls_begin(),
1744 E = RD->redecls_end(); I != E; ++I) {
1745 I->addAttr(::new (Context) UnspecifiedInheritanceAttr(
1746 RD->getSourceRange(), Context));
1752 return Context.getMemberPointerType(T, Class.getTypePtr());
1755 /// \brief Build a block pointer type.
1757 /// \param T The type to which we'll be building a block pointer.
1759 /// \param Loc The source location, used for diagnostics.
1761 /// \param Entity The name of the entity that involves the block pointer
1764 /// \returns A suitable block pointer type, if there are no
1765 /// errors. Otherwise, returns a NULL type.
1766 QualType Sema::BuildBlockPointerType(QualType T,
1768 DeclarationName Entity) {
1769 if (!T->isFunctionType()) {
1770 Diag(Loc, diag::err_nonfunction_block_type);
1774 return Context.getBlockPointerType(T);
1777 QualType Sema::GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo) {
1778 QualType QT = Ty.get();
1780 if (TInfo) *TInfo = 0;
1784 TypeSourceInfo *DI = 0;
1785 if (const LocInfoType *LIT = dyn_cast<LocInfoType>(QT)) {
1786 QT = LIT->getType();
1787 DI = LIT->getTypeSourceInfo();
1790 if (TInfo) *TInfo = DI;
1794 static void transferARCOwnershipToDeclaratorChunk(TypeProcessingState &state,
1795 Qualifiers::ObjCLifetime ownership,
1796 unsigned chunkIndex);
1798 /// Given that this is the declaration of a parameter under ARC,
1799 /// attempt to infer attributes and such for pointer-to-whatever
1801 static void inferARCWriteback(TypeProcessingState &state,
1802 QualType &declSpecType) {
1803 Sema &S = state.getSema();
1804 Declarator &declarator = state.getDeclarator();
1806 // TODO: should we care about decl qualifiers?
1808 // Check whether the declarator has the expected form. We walk
1809 // from the inside out in order to make the block logic work.
1810 unsigned outermostPointerIndex = 0;
1811 bool isBlockPointer = false;
1812 unsigned numPointers = 0;
1813 for (unsigned i = 0, e = declarator.getNumTypeObjects(); i != e; ++i) {
1814 unsigned chunkIndex = i;
1815 DeclaratorChunk &chunk = declarator.getTypeObject(chunkIndex);
1816 switch (chunk.Kind) {
1817 case DeclaratorChunk::Paren:
1821 case DeclaratorChunk::Reference:
1822 case DeclaratorChunk::Pointer:
1823 // Count the number of pointers. Treat references
1824 // interchangeably as pointers; if they're mis-ordered, normal
1825 // type building will discover that.
1826 outermostPointerIndex = chunkIndex;
1830 case DeclaratorChunk::BlockPointer:
1831 // If we have a pointer to block pointer, that's an acceptable
1832 // indirect reference; anything else is not an application of
1834 if (numPointers != 1) return;
1836 outermostPointerIndex = chunkIndex;
1837 isBlockPointer = true;
1839 // We don't care about pointer structure in return values here.
1842 case DeclaratorChunk::Array: // suppress if written (id[])?
1843 case DeclaratorChunk::Function:
1844 case DeclaratorChunk::MemberPointer:
1850 // If we have *one* pointer, then we want to throw the qualifier on
1851 // the declaration-specifiers, which means that it needs to be a
1852 // retainable object type.
1853 if (numPointers == 1) {
1854 // If it's not a retainable object type, the rule doesn't apply.
1855 if (!declSpecType->isObjCRetainableType()) return;
1857 // If it already has lifetime, don't do anything.
1858 if (declSpecType.getObjCLifetime()) return;
1860 // Otherwise, modify the type in-place.
1863 if (declSpecType->isObjCARCImplicitlyUnretainedType())
1864 qs.addObjCLifetime(Qualifiers::OCL_ExplicitNone);
1866 qs.addObjCLifetime(Qualifiers::OCL_Autoreleasing);
1867 declSpecType = S.Context.getQualifiedType(declSpecType, qs);
1869 // If we have *two* pointers, then we want to throw the qualifier on
1870 // the outermost pointer.
1871 } else if (numPointers == 2) {
1872 // If we don't have a block pointer, we need to check whether the
1873 // declaration-specifiers gave us something that will turn into a
1874 // retainable object pointer after we slap the first pointer on it.
1875 if (!isBlockPointer && !declSpecType->isObjCObjectType())
1878 // Look for an explicit lifetime attribute there.
1879 DeclaratorChunk &chunk = declarator.getTypeObject(outermostPointerIndex);
1880 if (chunk.Kind != DeclaratorChunk::Pointer &&
1881 chunk.Kind != DeclaratorChunk::BlockPointer)
1883 for (const AttributeList *attr = chunk.getAttrs(); attr;
1884 attr = attr->getNext())
1885 if (attr->getKind() == AttributeList::AT_ObjCOwnership)
1888 transferARCOwnershipToDeclaratorChunk(state, Qualifiers::OCL_Autoreleasing,
1889 outermostPointerIndex);
1891 // Any other number of pointers/references does not trigger the rule.
1894 // TODO: mark whether we did this inference?
1897 static void diagnoseIgnoredQualifiers(
1898 Sema &S, unsigned Quals,
1899 SourceLocation FallbackLoc,
1900 SourceLocation ConstQualLoc = SourceLocation(),
1901 SourceLocation VolatileQualLoc = SourceLocation(),
1902 SourceLocation RestrictQualLoc = SourceLocation(),
1903 SourceLocation AtomicQualLoc = SourceLocation()) {
1907 const SourceManager &SM = S.getSourceManager();
1913 } const QualKinds[4] = {
1914 { DeclSpec::TQ_const, "const", ConstQualLoc },
1915 { DeclSpec::TQ_volatile, "volatile", VolatileQualLoc },
1916 { DeclSpec::TQ_restrict, "restrict", RestrictQualLoc },
1917 { DeclSpec::TQ_atomic, "_Atomic", AtomicQualLoc }
1920 llvm::SmallString<32> QualStr;
1921 unsigned NumQuals = 0;
1923 FixItHint FixIts[4];
1925 // Build a string naming the redundant qualifiers.
1926 for (unsigned I = 0; I != 4; ++I) {
1927 if (Quals & QualKinds[I].Mask) {
1928 if (!QualStr.empty()) QualStr += ' ';
1929 QualStr += QualKinds[I].Name;
1931 // If we have a location for the qualifier, offer a fixit.
1932 SourceLocation QualLoc = QualKinds[I].Loc;
1933 if (!QualLoc.isInvalid()) {
1934 FixIts[NumQuals] = FixItHint::CreateRemoval(QualLoc);
1935 if (Loc.isInvalid() || SM.isBeforeInTranslationUnit(QualLoc, Loc))
1943 S.Diag(Loc.isInvalid() ? FallbackLoc : Loc, diag::warn_qual_return_type)
1944 << QualStr << NumQuals << FixIts[0] << FixIts[1] << FixIts[2] << FixIts[3];
1947 // Diagnose pointless type qualifiers on the return type of a function.
1948 static void diagnoseIgnoredFunctionQualifiers(Sema &S, QualType RetTy,
1950 unsigned FunctionChunkIndex) {
1951 if (D.getTypeObject(FunctionChunkIndex).Fun.hasTrailingReturnType()) {
1952 // FIXME: TypeSourceInfo doesn't preserve location information for
1954 diagnoseIgnoredQualifiers(S, RetTy.getLocalCVRQualifiers(),
1955 D.getIdentifierLoc());
1959 for (unsigned OuterChunkIndex = FunctionChunkIndex + 1,
1960 End = D.getNumTypeObjects();
1961 OuterChunkIndex != End; ++OuterChunkIndex) {
1962 DeclaratorChunk &OuterChunk = D.getTypeObject(OuterChunkIndex);
1963 switch (OuterChunk.Kind) {
1964 case DeclaratorChunk::Paren:
1967 case DeclaratorChunk::Pointer: {
1968 DeclaratorChunk::PointerTypeInfo &PTI = OuterChunk.Ptr;
1969 diagnoseIgnoredQualifiers(
1972 SourceLocation::getFromRawEncoding(PTI.ConstQualLoc),
1973 SourceLocation::getFromRawEncoding(PTI.VolatileQualLoc),
1974 SourceLocation::getFromRawEncoding(PTI.RestrictQualLoc),
1975 SourceLocation::getFromRawEncoding(PTI.AtomicQualLoc));
1979 case DeclaratorChunk::Function:
1980 case DeclaratorChunk::BlockPointer:
1981 case DeclaratorChunk::Reference:
1982 case DeclaratorChunk::Array:
1983 case DeclaratorChunk::MemberPointer:
1984 // FIXME: We can't currently provide an accurate source location and a
1985 // fix-it hint for these.
1986 unsigned AtomicQual = RetTy->isAtomicType() ? DeclSpec::TQ_atomic : 0;
1987 diagnoseIgnoredQualifiers(S, RetTy.getCVRQualifiers() | AtomicQual,
1988 D.getIdentifierLoc());
1992 llvm_unreachable("unknown declarator chunk kind");
1995 // If the qualifiers come from a conversion function type, don't diagnose
1996 // them -- they're not necessarily redundant, since such a conversion
1997 // operator can be explicitly called as "x.operator const int()".
1998 if (D.getName().getKind() == UnqualifiedId::IK_ConversionFunctionId)
2001 // Just parens all the way out to the decl specifiers. Diagnose any qualifiers
2002 // which are present there.
2003 diagnoseIgnoredQualifiers(S, D.getDeclSpec().getTypeQualifiers(),
2004 D.getIdentifierLoc(),
2005 D.getDeclSpec().getConstSpecLoc(),
2006 D.getDeclSpec().getVolatileSpecLoc(),
2007 D.getDeclSpec().getRestrictSpecLoc(),
2008 D.getDeclSpec().getAtomicSpecLoc());
2011 static QualType GetDeclSpecTypeForDeclarator(TypeProcessingState &state,
2012 TypeSourceInfo *&ReturnTypeInfo) {
2013 Sema &SemaRef = state.getSema();
2014 Declarator &D = state.getDeclarator();
2018 // The TagDecl owned by the DeclSpec.
2019 TagDecl *OwnedTagDecl = 0;
2021 bool ContainsPlaceholderType = false;
2023 switch (D.getName().getKind()) {
2024 case UnqualifiedId::IK_ImplicitSelfParam:
2025 case UnqualifiedId::IK_OperatorFunctionId:
2026 case UnqualifiedId::IK_Identifier:
2027 case UnqualifiedId::IK_LiteralOperatorId:
2028 case UnqualifiedId::IK_TemplateId:
2029 T = ConvertDeclSpecToType(state);
2030 ContainsPlaceholderType = D.getDeclSpec().containsPlaceholderType();
2032 if (!D.isInvalidType() && D.getDeclSpec().isTypeSpecOwned()) {
2033 OwnedTagDecl = cast<TagDecl>(D.getDeclSpec().getRepAsDecl());
2034 // Owned declaration is embedded in declarator.
2035 OwnedTagDecl->setEmbeddedInDeclarator(true);
2039 case UnqualifiedId::IK_ConstructorName:
2040 case UnqualifiedId::IK_ConstructorTemplateId:
2041 case UnqualifiedId::IK_DestructorName:
2042 // Constructors and destructors don't have return types. Use
2044 T = SemaRef.Context.VoidTy;
2045 if (AttributeList *attrs = D.getDeclSpec().getAttributes().getList())
2046 processTypeAttrs(state, T, TAL_DeclSpec, attrs);
2049 case UnqualifiedId::IK_ConversionFunctionId:
2050 // The result type of a conversion function is the type that it
2052 T = SemaRef.GetTypeFromParser(D.getName().ConversionFunctionId,
2054 ContainsPlaceholderType = T->getContainedAutoType();
2058 if (D.getAttributes())
2059 distributeTypeAttrsFromDeclarator(state, T);
2061 // C++11 [dcl.spec.auto]p5: reject 'auto' if it is not in an allowed context.
2062 // In C++11, a function declarator using 'auto' must have a trailing return
2063 // type (this is checked later) and we can skip this. In other languages
2064 // using auto, we need to check regardless.
2065 if (ContainsPlaceholderType &&
2066 (!SemaRef.getLangOpts().CPlusPlus11 || !D.isFunctionDeclarator())) {
2069 switch (D.getContext()) {
2070 case Declarator::KNRTypeListContext:
2071 llvm_unreachable("K&R type lists aren't allowed in C++");
2072 case Declarator::LambdaExprContext:
2073 llvm_unreachable("Can't specify a type specifier in lambda grammar");
2074 case Declarator::ObjCParameterContext:
2075 case Declarator::ObjCResultContext:
2076 case Declarator::PrototypeContext:
2077 Error = 0; // Function prototype
2079 case Declarator::MemberContext:
2080 if (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_static)
2082 switch (cast<TagDecl>(SemaRef.CurContext)->getTagKind()) {
2083 case TTK_Enum: llvm_unreachable("unhandled tag kind");
2084 case TTK_Struct: Error = 1; /* Struct member */ break;
2085 case TTK_Union: Error = 2; /* Union member */ break;
2086 case TTK_Class: Error = 3; /* Class member */ break;
2087 case TTK_Interface: Error = 4; /* Interface member */ break;
2090 case Declarator::CXXCatchContext:
2091 case Declarator::ObjCCatchContext:
2092 Error = 5; // Exception declaration
2094 case Declarator::TemplateParamContext:
2095 Error = 6; // Template parameter
2097 case Declarator::BlockLiteralContext:
2098 Error = 7; // Block literal
2100 case Declarator::TemplateTypeArgContext:
2101 Error = 8; // Template type argument
2103 case Declarator::AliasDeclContext:
2104 case Declarator::AliasTemplateContext:
2105 Error = 10; // Type alias
2107 case Declarator::TrailingReturnContext:
2108 if (!SemaRef.getLangOpts().CPlusPlus1y)
2109 Error = 11; // Function return type
2111 case Declarator::ConversionIdContext:
2112 if (!SemaRef.getLangOpts().CPlusPlus1y)
2113 Error = 12; // conversion-type-id
2115 case Declarator::TypeNameContext:
2116 Error = 13; // Generic
2118 case Declarator::FileContext:
2119 case Declarator::BlockContext:
2120 case Declarator::ForContext:
2121 case Declarator::ConditionContext:
2122 case Declarator::CXXNewContext:
2126 if (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef)
2129 // In Objective-C it is an error to use 'auto' on a function declarator.
2130 if (D.isFunctionDeclarator())
2133 // C++11 [dcl.spec.auto]p2: 'auto' is always fine if the declarator
2134 // contains a trailing return type. That is only legal at the outermost
2135 // level. Check all declarator chunks (outermost first) anyway, to give
2136 // better diagnostics.
2137 if (SemaRef.getLangOpts().CPlusPlus11 && Error != -1) {
2138 for (unsigned i = 0, e = D.getNumTypeObjects(); i != e; ++i) {
2139 unsigned chunkIndex = e - i - 1;
2140 state.setCurrentChunkIndex(chunkIndex);
2141 DeclaratorChunk &DeclType = D.getTypeObject(chunkIndex);
2142 if (DeclType.Kind == DeclaratorChunk::Function) {
2143 const DeclaratorChunk::FunctionTypeInfo &FTI = DeclType.Fun;
2144 if (FTI.hasTrailingReturnType()) {
2152 SourceRange AutoRange = D.getDeclSpec().getTypeSpecTypeLoc();
2153 if (D.getName().getKind() == UnqualifiedId::IK_ConversionFunctionId)
2154 AutoRange = D.getName().getSourceRange();
2157 SemaRef.Diag(AutoRange.getBegin(), diag::err_auto_not_allowed)
2158 << Error << AutoRange;
2159 T = SemaRef.Context.IntTy;
2160 D.setInvalidType(true);
2162 SemaRef.Diag(AutoRange.getBegin(),
2163 diag::warn_cxx98_compat_auto_type_specifier)
2167 if (SemaRef.getLangOpts().CPlusPlus &&
2168 OwnedTagDecl && OwnedTagDecl->isCompleteDefinition()) {
2169 // Check the contexts where C++ forbids the declaration of a new class
2170 // or enumeration in a type-specifier-seq.
2171 switch (D.getContext()) {
2172 case Declarator::TrailingReturnContext:
2173 // Class and enumeration definitions are syntactically not allowed in
2174 // trailing return types.
2175 llvm_unreachable("parser should not have allowed this");
2177 case Declarator::FileContext:
2178 case Declarator::MemberContext:
2179 case Declarator::BlockContext:
2180 case Declarator::ForContext:
2181 case Declarator::BlockLiteralContext:
2182 case Declarator::LambdaExprContext:
2183 // C++11 [dcl.type]p3:
2184 // A type-specifier-seq shall not define a class or enumeration unless
2185 // it appears in the type-id of an alias-declaration (7.1.3) that is not
2186 // the declaration of a template-declaration.
2187 case Declarator::AliasDeclContext:
2189 case Declarator::AliasTemplateContext:
2190 SemaRef.Diag(OwnedTagDecl->getLocation(),
2191 diag::err_type_defined_in_alias_template)
2192 << SemaRef.Context.getTypeDeclType(OwnedTagDecl);
2193 D.setInvalidType(true);
2195 case Declarator::TypeNameContext:
2196 case Declarator::ConversionIdContext:
2197 case Declarator::TemplateParamContext:
2198 case Declarator::CXXNewContext:
2199 case Declarator::CXXCatchContext:
2200 case Declarator::ObjCCatchContext:
2201 case Declarator::TemplateTypeArgContext:
2202 SemaRef.Diag(OwnedTagDecl->getLocation(),
2203 diag::err_type_defined_in_type_specifier)
2204 << SemaRef.Context.getTypeDeclType(OwnedTagDecl);
2205 D.setInvalidType(true);
2207 case Declarator::PrototypeContext:
2208 case Declarator::ObjCParameterContext:
2209 case Declarator::ObjCResultContext:
2210 case Declarator::KNRTypeListContext:
2212 // Types shall not be defined in return or parameter types.
2213 SemaRef.Diag(OwnedTagDecl->getLocation(),
2214 diag::err_type_defined_in_param_type)
2215 << SemaRef.Context.getTypeDeclType(OwnedTagDecl);
2216 D.setInvalidType(true);
2218 case Declarator::ConditionContext:
2220 // The type-specifier-seq shall not contain typedef and shall not declare
2221 // a new class or enumeration.
2222 SemaRef.Diag(OwnedTagDecl->getLocation(),
2223 diag::err_type_defined_in_condition);
2224 D.setInvalidType(true);
2232 static std::string getFunctionQualifiersAsString(const FunctionProtoType *FnTy){
2234 Qualifiers::fromCVRMask(FnTy->getTypeQuals()).getAsString();
2236 switch (FnTy->getRefQualifier()) {
2256 /// Check that the function type T, which has a cv-qualifier or a ref-qualifier,
2257 /// can be contained within the declarator chunk DeclType, and produce an
2258 /// appropriate diagnostic if not.
2259 static void checkQualifiedFunction(Sema &S, QualType T,
2260 DeclaratorChunk &DeclType) {
2261 // C++98 [dcl.fct]p4 / C++11 [dcl.fct]p6: a function type with a
2262 // cv-qualifier or a ref-qualifier can only appear at the topmost level
2265 switch (DeclType.Kind) {
2266 case DeclaratorChunk::Paren:
2267 case DeclaratorChunk::MemberPointer:
2268 // These cases are permitted.
2270 case DeclaratorChunk::Array:
2271 case DeclaratorChunk::Function:
2272 // These cases don't allow function types at all; no need to diagnose the
2273 // qualifiers separately.
2275 case DeclaratorChunk::BlockPointer:
2278 case DeclaratorChunk::Pointer:
2281 case DeclaratorChunk::Reference:
2286 assert(DiagKind != -1);
2287 S.Diag(DeclType.Loc, diag::err_compound_qualified_function_type)
2288 << DiagKind << isa<FunctionType>(T.IgnoreParens()) << T
2289 << getFunctionQualifiersAsString(T->castAs<FunctionProtoType>());
2292 /// Produce an approprioate diagnostic for an ambiguity between a function
2293 /// declarator and a C++ direct-initializer.
2294 static void warnAboutAmbiguousFunction(Sema &S, Declarator &D,
2295 DeclaratorChunk &DeclType, QualType RT) {
2296 const DeclaratorChunk::FunctionTypeInfo &FTI = DeclType.Fun;
2297 assert(FTI.isAmbiguous && "no direct-initializer / function ambiguity");
2299 // If the return type is void there is no ambiguity.
2300 if (RT->isVoidType())
2303 // An initializer for a non-class type can have at most one argument.
2304 if (!RT->isRecordType() && FTI.NumArgs > 1)
2307 // An initializer for a reference must have exactly one argument.
2308 if (RT->isReferenceType() && FTI.NumArgs != 1)
2311 // Only warn if this declarator is declaring a function at block scope, and
2312 // doesn't have a storage class (such as 'extern') specified.
2313 if (!D.isFunctionDeclarator() ||
2314 D.getFunctionDefinitionKind() != FDK_Declaration ||
2315 !S.CurContext->isFunctionOrMethod() ||
2316 D.getDeclSpec().getStorageClassSpec()
2317 != DeclSpec::SCS_unspecified)
2320 // Inside a condition, a direct initializer is not permitted. We allow one to
2321 // be parsed in order to give better diagnostics in condition parsing.
2322 if (D.getContext() == Declarator::ConditionContext)
2325 SourceRange ParenRange(DeclType.Loc, DeclType.EndLoc);
2327 S.Diag(DeclType.Loc,
2328 FTI.NumArgs ? diag::warn_parens_disambiguated_as_function_declaration
2329 : diag::warn_empty_parens_are_function_decl)
2332 // If the declaration looks like:
2335 // and name lookup finds a function named 'f', then the ',' was
2336 // probably intended to be a ';'.
2337 if (!D.isFirstDeclarator() && D.getIdentifier()) {
2338 FullSourceLoc Comma(D.getCommaLoc(), S.SourceMgr);
2339 FullSourceLoc Name(D.getIdentifierLoc(), S.SourceMgr);
2340 if (Comma.getFileID() != Name.getFileID() ||
2341 Comma.getSpellingLineNumber() != Name.getSpellingLineNumber()) {
2342 LookupResult Result(S, D.getIdentifier(), SourceLocation(),
2343 Sema::LookupOrdinaryName);
2344 if (S.LookupName(Result, S.getCurScope()))
2345 S.Diag(D.getCommaLoc(), diag::note_empty_parens_function_call)
2346 << FixItHint::CreateReplacement(D.getCommaLoc(), ";")
2347 << D.getIdentifier();
2351 if (FTI.NumArgs > 0) {
2352 // For a declaration with parameters, eg. "T var(T());", suggest adding parens
2353 // around the first parameter to turn the declaration into a variable
2355 SourceRange Range = FTI.ArgInfo[0].Param->getSourceRange();
2356 SourceLocation B = Range.getBegin();
2357 SourceLocation E = S.PP.getLocForEndOfToken(Range.getEnd());
2358 // FIXME: Maybe we should suggest adding braces instead of parens
2359 // in C++11 for classes that don't have an initializer_list constructor.
2360 S.Diag(B, diag::note_additional_parens_for_variable_declaration)
2361 << FixItHint::CreateInsertion(B, "(")
2362 << FixItHint::CreateInsertion(E, ")");
2364 // For a declaration without parameters, eg. "T var();", suggest replacing the
2365 // parens with an initializer to turn the declaration into a variable
2367 const CXXRecordDecl *RD = RT->getAsCXXRecordDecl();
2369 // Empty parens mean value-initialization, and no parens mean
2370 // default initialization. These are equivalent if the default
2371 // constructor is user-provided or if zero-initialization is a
2373 if (RD && RD->hasDefinition() &&
2374 (RD->isEmpty() || RD->hasUserProvidedDefaultConstructor()))
2375 S.Diag(DeclType.Loc, diag::note_empty_parens_default_ctor)
2376 << FixItHint::CreateRemoval(ParenRange);
2378 std::string Init = S.getFixItZeroInitializerForType(RT);
2379 if (Init.empty() && S.LangOpts.CPlusPlus11)
2382 S.Diag(DeclType.Loc, diag::note_empty_parens_zero_initialize)
2383 << FixItHint::CreateReplacement(ParenRange, Init);
2388 static TypeSourceInfo *GetFullTypeForDeclarator(TypeProcessingState &state,
2389 QualType declSpecType,
2390 TypeSourceInfo *TInfo) {
2392 QualType T = declSpecType;
2393 Declarator &D = state.getDeclarator();
2394 Sema &S = state.getSema();
2395 ASTContext &Context = S.Context;
2396 const LangOptions &LangOpts = S.getLangOpts();
2398 // The name we're declaring, if any.
2399 DeclarationName Name;
2400 if (D.getIdentifier())
2401 Name = D.getIdentifier();
2403 // Does this declaration declare a typedef-name?
2404 bool IsTypedefName =
2405 D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef ||
2406 D.getContext() == Declarator::AliasDeclContext ||
2407 D.getContext() == Declarator::AliasTemplateContext;
2409 // Does T refer to a function type with a cv-qualifier or a ref-qualifier?
2410 bool IsQualifiedFunction = T->isFunctionProtoType() &&
2411 (T->castAs<FunctionProtoType>()->getTypeQuals() != 0 ||
2412 T->castAs<FunctionProtoType>()->getRefQualifier() != RQ_None);
2414 // If T is 'decltype(auto)', the only declarators we can have are parens
2415 // and at most one function declarator if this is a function declaration.
2416 if (const AutoType *AT = T->getAs<AutoType>()) {
2417 if (AT->isDecltypeAuto()) {
2418 for (unsigned I = 0, E = D.getNumTypeObjects(); I != E; ++I) {
2419 unsigned Index = E - I - 1;
2420 DeclaratorChunk &DeclChunk = D.getTypeObject(Index);
2421 unsigned DiagId = diag::err_decltype_auto_compound_type;
2422 unsigned DiagKind = 0;
2423 switch (DeclChunk.Kind) {
2424 case DeclaratorChunk::Paren:
2426 case DeclaratorChunk::Function: {
2428 if (D.isFunctionDeclarationContext() &&
2429 D.isFunctionDeclarator(FnIndex) && FnIndex == Index)
2431 DiagId = diag::err_decltype_auto_function_declarator_not_declaration;
2434 case DeclaratorChunk::Pointer:
2435 case DeclaratorChunk::BlockPointer:
2436 case DeclaratorChunk::MemberPointer:
2439 case DeclaratorChunk::Reference:
2442 case DeclaratorChunk::Array:
2447 S.Diag(DeclChunk.Loc, DiagId) << DiagKind;
2448 D.setInvalidType(true);
2454 // Walk the DeclTypeInfo, building the recursive type as we go.
2455 // DeclTypeInfos are ordered from the identifier out, which is
2456 // opposite of what we want :).
2457 for (unsigned i = 0, e = D.getNumTypeObjects(); i != e; ++i) {
2458 unsigned chunkIndex = e - i - 1;
2459 state.setCurrentChunkIndex(chunkIndex);
2460 DeclaratorChunk &DeclType = D.getTypeObject(chunkIndex);
2461 if (IsQualifiedFunction) {
2462 checkQualifiedFunction(S, T, DeclType);
2463 IsQualifiedFunction = DeclType.Kind == DeclaratorChunk::Paren;
2465 switch (DeclType.Kind) {
2466 case DeclaratorChunk::Paren:
2467 T = S.BuildParenType(T);
2469 case DeclaratorChunk::BlockPointer:
2470 // If blocks are disabled, emit an error.
2471 if (!LangOpts.Blocks)
2472 S.Diag(DeclType.Loc, diag::err_blocks_disable);
2474 T = S.BuildBlockPointerType(T, D.getIdentifierLoc(), Name);
2475 if (DeclType.Cls.TypeQuals)
2476 T = S.BuildQualifiedType(T, DeclType.Loc, DeclType.Cls.TypeQuals);
2478 case DeclaratorChunk::Pointer:
2479 // Verify that we're not building a pointer to pointer to function with
2480 // exception specification.
2481 if (LangOpts.CPlusPlus && S.CheckDistantExceptionSpec(T)) {
2482 S.Diag(D.getIdentifierLoc(), diag::err_distant_exception_spec);
2483 D.setInvalidType(true);
2484 // Build the type anyway.
2486 if (LangOpts.ObjC1 && T->getAs<ObjCObjectType>()) {
2487 T = Context.getObjCObjectPointerType(T);
2488 if (DeclType.Ptr.TypeQuals)
2489 T = S.BuildQualifiedType(T, DeclType.Loc, DeclType.Ptr.TypeQuals);
2492 T = S.BuildPointerType(T, DeclType.Loc, Name);
2493 if (DeclType.Ptr.TypeQuals)
2494 T = S.BuildQualifiedType(T, DeclType.Loc, DeclType.Ptr.TypeQuals);
2497 case DeclaratorChunk::Reference: {
2498 // Verify that we're not building a reference to pointer to function with
2499 // exception specification.
2500 if (LangOpts.CPlusPlus && S.CheckDistantExceptionSpec(T)) {
2501 S.Diag(D.getIdentifierLoc(), diag::err_distant_exception_spec);
2502 D.setInvalidType(true);
2503 // Build the type anyway.
2505 T = S.BuildReferenceType(T, DeclType.Ref.LValueRef, DeclType.Loc, Name);
2508 if (DeclType.Ref.HasRestrict)
2509 T = S.BuildQualifiedType(T, DeclType.Loc, Qualifiers::Restrict);
2512 case DeclaratorChunk::Array: {
2513 // Verify that we're not building an array of pointers to function with
2514 // exception specification.
2515 if (LangOpts.CPlusPlus && S.CheckDistantExceptionSpec(T)) {
2516 S.Diag(D.getIdentifierLoc(), diag::err_distant_exception_spec);
2517 D.setInvalidType(true);
2518 // Build the type anyway.
2520 DeclaratorChunk::ArrayTypeInfo &ATI = DeclType.Arr;
2521 Expr *ArraySize = static_cast<Expr*>(ATI.NumElts);
2522 ArrayType::ArraySizeModifier ASM;
2524 ASM = ArrayType::Star;
2525 else if (ATI.hasStatic)
2526 ASM = ArrayType::Static;
2528 ASM = ArrayType::Normal;
2529 if (ASM == ArrayType::Star && !D.isPrototypeContext()) {
2530 // FIXME: This check isn't quite right: it allows star in prototypes
2531 // for function definitions, and disallows some edge cases detailed
2532 // in http://gcc.gnu.org/ml/gcc-patches/2009-02/msg00133.html
2533 S.Diag(DeclType.Loc, diag::err_array_star_outside_prototype);
2534 ASM = ArrayType::Normal;
2535 D.setInvalidType(true);
2538 // C99 6.7.5.2p1: The optional type qualifiers and the keyword static
2539 // shall appear only in a declaration of a function parameter with an
2541 if (ASM == ArrayType::Static || ATI.TypeQuals) {
2542 if (!(D.isPrototypeContext() ||
2543 D.getContext() == Declarator::KNRTypeListContext)) {
2544 S.Diag(DeclType.Loc, diag::err_array_static_outside_prototype) <<
2545 (ASM == ArrayType::Static ? "'static'" : "type qualifier");
2546 // Remove the 'static' and the type qualifiers.
2547 if (ASM == ArrayType::Static)
2548 ASM = ArrayType::Normal;
2550 D.setInvalidType(true);
2553 // C99 6.7.5.2p1: ... and then only in the outermost array type
2555 unsigned x = chunkIndex;
2557 // Walk outwards along the declarator chunks.
2559 const DeclaratorChunk &DC = D.getTypeObject(x);
2561 case DeclaratorChunk::Paren:
2563 case DeclaratorChunk::Array:
2564 case DeclaratorChunk::Pointer:
2565 case DeclaratorChunk::Reference:
2566 case DeclaratorChunk::MemberPointer:
2567 S.Diag(DeclType.Loc, diag::err_array_static_not_outermost) <<
2568 (ASM == ArrayType::Static ? "'static'" : "type qualifier");
2569 if (ASM == ArrayType::Static)
2570 ASM = ArrayType::Normal;
2572 D.setInvalidType(true);
2574 case DeclaratorChunk::Function:
2575 case DeclaratorChunk::BlockPointer:
2576 // These are invalid anyway, so just ignore.
2582 if (const AutoType *AT = T->getContainedAutoType()) {
2583 // We've already diagnosed this for decltype(auto).
2584 if (!AT->isDecltypeAuto())
2585 S.Diag(DeclType.Loc, diag::err_illegal_decl_array_of_auto)
2586 << getPrintableNameForEntity(Name) << T;
2591 T = S.BuildArrayType(T, ASM, ArraySize, ATI.TypeQuals,
2592 SourceRange(DeclType.Loc, DeclType.EndLoc), Name);
2595 case DeclaratorChunk::Function: {
2596 // If the function declarator has a prototype (i.e. it is not () and
2597 // does not have a K&R-style identifier list), then the arguments are part
2598 // of the type, otherwise the argument list is ().
2599 const DeclaratorChunk::FunctionTypeInfo &FTI = DeclType.Fun;
2600 IsQualifiedFunction = FTI.TypeQuals || FTI.hasRefQualifier();
2602 // Check for auto functions and trailing return type and adjust the
2603 // return type accordingly.
2604 if (!D.isInvalidType()) {
2605 // trailing-return-type is only required if we're declaring a function,
2606 // and not, for instance, a pointer to a function.
2607 if (D.getDeclSpec().getTypeSpecType() == DeclSpec::TST_auto &&
2608 !FTI.hasTrailingReturnType() && chunkIndex == 0 &&
2609 !S.getLangOpts().CPlusPlus1y) {
2610 S.Diag(D.getDeclSpec().getTypeSpecTypeLoc(),
2611 diag::err_auto_missing_trailing_return);
2613 D.setInvalidType(true);
2614 } else if (FTI.hasTrailingReturnType()) {
2615 // T must be exactly 'auto' at this point. See CWG issue 681.
2616 if (isa<ParenType>(T)) {
2617 S.Diag(D.getDeclSpec().getTypeSpecTypeLoc(),
2618 diag::err_trailing_return_in_parens)
2619 << T << D.getDeclSpec().getSourceRange();
2620 D.setInvalidType(true);
2621 } else if (D.getContext() != Declarator::LambdaExprContext &&
2622 (T.hasQualifiers() || !isa<AutoType>(T) ||
2623 cast<AutoType>(T)->isDecltypeAuto())) {
2624 S.Diag(D.getDeclSpec().getTypeSpecTypeLoc(),
2625 diag::err_trailing_return_without_auto)
2626 << T << D.getDeclSpec().getSourceRange();
2627 D.setInvalidType(true);
2629 T = S.GetTypeFromParser(FTI.getTrailingReturnType(), &TInfo);
2631 // An error occurred parsing the trailing return type.
2633 D.setInvalidType(true);
2638 // C99 6.7.5.3p1: The return type may not be a function or array type.
2639 // For conversion functions, we'll diagnose this particular error later.
2640 if ((T->isArrayType() || T->isFunctionType()) &&
2641 (D.getName().getKind() != UnqualifiedId::IK_ConversionFunctionId)) {
2642 unsigned diagID = diag::err_func_returning_array_function;
2643 // Last processing chunk in block context means this function chunk
2644 // represents the block.
2645 if (chunkIndex == 0 &&
2646 D.getContext() == Declarator::BlockLiteralContext)
2647 diagID = diag::err_block_returning_array_function;
2648 S.Diag(DeclType.Loc, diagID) << T->isFunctionType() << T;
2650 D.setInvalidType(true);
2653 // Do not allow returning half FP value.
2654 // FIXME: This really should be in BuildFunctionType.
2655 if (T->isHalfType()) {
2656 if (S.getLangOpts().OpenCL) {
2657 if (!S.getOpenCLOptions().cl_khr_fp16) {
2658 S.Diag(D.getIdentifierLoc(), diag::err_opencl_half_return) << T;
2659 D.setInvalidType(true);
2662 S.Diag(D.getIdentifierLoc(),
2663 diag::err_parameters_retval_cannot_have_fp16_type) << 1;
2664 D.setInvalidType(true);
2668 // cv-qualifiers on return types are pointless except when the type is a
2669 // class type in C++.
2670 if ((T.getCVRQualifiers() || T->isAtomicType()) &&
2671 !(S.getLangOpts().CPlusPlus &&
2672 (T->isDependentType() || T->isRecordType())))
2673 diagnoseIgnoredFunctionQualifiers(S, T, D, chunkIndex);
2675 // Objective-C ARC ownership qualifiers are ignored on the function
2676 // return type (by type canonicalization). Complain if this attribute
2677 // was written here.
2678 if (T.getQualifiers().hasObjCLifetime()) {
2679 SourceLocation AttrLoc;
2680 if (chunkIndex + 1 < D.getNumTypeObjects()) {
2681 DeclaratorChunk ReturnTypeChunk = D.getTypeObject(chunkIndex + 1);
2682 for (const AttributeList *Attr = ReturnTypeChunk.getAttrs();
2683 Attr; Attr = Attr->getNext()) {
2684 if (Attr->getKind() == AttributeList::AT_ObjCOwnership) {
2685 AttrLoc = Attr->getLoc();
2690 if (AttrLoc.isInvalid()) {
2691 for (const AttributeList *Attr
2692 = D.getDeclSpec().getAttributes().getList();
2693 Attr; Attr = Attr->getNext()) {
2694 if (Attr->getKind() == AttributeList::AT_ObjCOwnership) {
2695 AttrLoc = Attr->getLoc();
2701 if (AttrLoc.isValid()) {
2702 // The ownership attributes are almost always written via
2704 // __strong/__weak/__autoreleasing/__unsafe_unretained.
2705 if (AttrLoc.isMacroID())
2706 AttrLoc = S.SourceMgr.getImmediateExpansionRange(AttrLoc).first;
2708 S.Diag(AttrLoc, diag::warn_arc_lifetime_result_type)
2709 << T.getQualifiers().getObjCLifetime();
2713 if (LangOpts.CPlusPlus && D.getDeclSpec().isTypeSpecOwned()) {
2715 // Types shall not be defined in return or parameter types.
2716 TagDecl *Tag = cast<TagDecl>(D.getDeclSpec().getRepAsDecl());
2717 if (Tag->isCompleteDefinition())
2718 S.Diag(Tag->getLocation(), diag::err_type_defined_in_result_type)
2719 << Context.getTypeDeclType(Tag);
2722 // Exception specs are not allowed in typedefs. Complain, but add it
2724 if (IsTypedefName && FTI.getExceptionSpecType())
2725 S.Diag(FTI.getExceptionSpecLoc(), diag::err_exception_spec_in_typedef)
2726 << (D.getContext() == Declarator::AliasDeclContext ||
2727 D.getContext() == Declarator::AliasTemplateContext);
2729 // If we see "T var();" or "T var(T());" at block scope, it is probably
2730 // an attempt to initialize a variable, not a function declaration.
2731 if (FTI.isAmbiguous)
2732 warnAboutAmbiguousFunction(S, D, DeclType, T);
2734 if (!FTI.NumArgs && !FTI.isVariadic && !LangOpts.CPlusPlus) {
2735 // Simple void foo(), where the incoming T is the result type.
2736 T = Context.getFunctionNoProtoType(T);
2738 // We allow a zero-parameter variadic function in C if the
2739 // function is marked with the "overloadable" attribute. Scan
2740 // for this attribute now.
2741 if (!FTI.NumArgs && FTI.isVariadic && !LangOpts.CPlusPlus) {
2742 bool Overloadable = false;
2743 for (const AttributeList *Attrs = D.getAttributes();
2744 Attrs; Attrs = Attrs->getNext()) {
2745 if (Attrs->getKind() == AttributeList::AT_Overloadable) {
2746 Overloadable = true;
2752 S.Diag(FTI.getEllipsisLoc(), diag::err_ellipsis_first_arg);
2755 if (FTI.NumArgs && FTI.ArgInfo[0].Param == 0) {
2756 // C99 6.7.5.3p3: Reject int(x,y,z) when it's not a function
2758 S.Diag(FTI.ArgInfo[0].IdentLoc, diag::err_ident_list_in_fn_declaration);
2759 D.setInvalidType(true);
2760 // Recover by creating a K&R-style function type.
2761 T = Context.getFunctionNoProtoType(T);
2765 FunctionProtoType::ExtProtoInfo EPI;
2766 EPI.Variadic = FTI.isVariadic;
2767 EPI.HasTrailingReturn = FTI.hasTrailingReturnType();
2768 EPI.TypeQuals = FTI.TypeQuals;
2769 EPI.RefQualifier = !FTI.hasRefQualifier()? RQ_None
2770 : FTI.RefQualifierIsLValueRef? RQ_LValue
2773 // Otherwise, we have a function with an argument list that is
2774 // potentially variadic.
2775 SmallVector<QualType, 16> ArgTys;
2776 ArgTys.reserve(FTI.NumArgs);
2778 SmallVector<bool, 16> ConsumedArguments;
2779 ConsumedArguments.reserve(FTI.NumArgs);
2780 bool HasAnyConsumedArguments = false;
2782 for (unsigned i = 0, e = FTI.NumArgs; i != e; ++i) {
2783 ParmVarDecl *Param = cast<ParmVarDecl>(FTI.ArgInfo[i].Param);
2784 QualType ArgTy = Param->getType();
2785 assert(!ArgTy.isNull() && "Couldn't parse type?");
2787 // Adjust the parameter type.
2788 assert((ArgTy == Context.getAdjustedParameterType(ArgTy)) &&
2789 "Unadjusted type?");
2791 // Look for 'void'. void is allowed only as a single argument to a
2792 // function with no other parameters (C99 6.7.5.3p10). We record
2793 // int(void) as a FunctionProtoType with an empty argument list.
2794 if (ArgTy->isVoidType()) {
2795 // If this is something like 'float(int, void)', reject it. 'void'
2796 // is an incomplete type (C99 6.2.5p19) and function decls cannot
2797 // have arguments of incomplete type.
2798 if (FTI.NumArgs != 1 || FTI.isVariadic) {
2799 S.Diag(DeclType.Loc, diag::err_void_only_param);
2800 ArgTy = Context.IntTy;
2801 Param->setType(ArgTy);
2802 } else if (FTI.ArgInfo[i].Ident) {
2803 // Reject, but continue to parse 'int(void abc)'.
2804 S.Diag(FTI.ArgInfo[i].IdentLoc,
2805 diag::err_param_with_void_type);
2806 ArgTy = Context.IntTy;
2807 Param->setType(ArgTy);
2809 // Reject, but continue to parse 'float(const void)'.
2810 if (ArgTy.hasQualifiers())
2811 S.Diag(DeclType.Loc, diag::err_void_param_qualified);
2813 // Do not add 'void' to the ArgTys list.
2816 } else if (ArgTy->isHalfType()) {
2817 // Disallow half FP arguments.
2818 // FIXME: This really should be in BuildFunctionType.
2819 if (S.getLangOpts().OpenCL) {
2820 if (!S.getOpenCLOptions().cl_khr_fp16) {
2821 S.Diag(Param->getLocation(),
2822 diag::err_opencl_half_argument) << ArgTy;
2824 Param->setInvalidDecl();
2827 S.Diag(Param->getLocation(),
2828 diag::err_parameters_retval_cannot_have_fp16_type) << 0;
2831 } else if (!FTI.hasPrototype) {
2832 if (ArgTy->isPromotableIntegerType()) {
2833 ArgTy = Context.getPromotedIntegerType(ArgTy);
2834 Param->setKNRPromoted(true);
2835 } else if (const BuiltinType* BTy = ArgTy->getAs<BuiltinType>()) {
2836 if (BTy->getKind() == BuiltinType::Float) {
2837 ArgTy = Context.DoubleTy;
2838 Param->setKNRPromoted(true);
2843 if (LangOpts.ObjCAutoRefCount) {
2844 bool Consumed = Param->hasAttr<NSConsumedAttr>();
2845 ConsumedArguments.push_back(Consumed);
2846 HasAnyConsumedArguments |= Consumed;
2849 ArgTys.push_back(ArgTy);
2852 if (HasAnyConsumedArguments)
2853 EPI.ConsumedArguments = ConsumedArguments.data();
2855 SmallVector<QualType, 4> Exceptions;
2856 SmallVector<ParsedType, 2> DynamicExceptions;
2857 SmallVector<SourceRange, 2> DynamicExceptionRanges;
2858 Expr *NoexceptExpr = 0;
2860 if (FTI.getExceptionSpecType() == EST_Dynamic) {
2861 // FIXME: It's rather inefficient to have to split into two vectors
2863 unsigned N = FTI.NumExceptions;
2864 DynamicExceptions.reserve(N);
2865 DynamicExceptionRanges.reserve(N);
2866 for (unsigned I = 0; I != N; ++I) {
2867 DynamicExceptions.push_back(FTI.Exceptions[I].Ty);
2868 DynamicExceptionRanges.push_back(FTI.Exceptions[I].Range);
2870 } else if (FTI.getExceptionSpecType() == EST_ComputedNoexcept) {
2871 NoexceptExpr = FTI.NoexceptExpr;
2874 S.checkExceptionSpecification(FTI.getExceptionSpecType(),
2876 DynamicExceptionRanges,
2881 T = Context.getFunctionType(T, ArgTys, EPI);
2886 case DeclaratorChunk::MemberPointer:
2887 // The scope spec must refer to a class, or be dependent.
2888 CXXScopeSpec &SS = DeclType.Mem.Scope();
2890 if (SS.isInvalid()) {
2891 // Avoid emitting extra errors if we already errored on the scope.
2892 D.setInvalidType(true);
2893 } else if (S.isDependentScopeSpecifier(SS) ||
2894 dyn_cast_or_null<CXXRecordDecl>(S.computeDeclContext(SS))) {
2895 NestedNameSpecifier *NNS
2896 = static_cast<NestedNameSpecifier*>(SS.getScopeRep());
2897 NestedNameSpecifier *NNSPrefix = NNS->getPrefix();
2898 switch (NNS->getKind()) {
2899 case NestedNameSpecifier::Identifier:
2900 ClsType = Context.getDependentNameType(ETK_None, NNSPrefix,
2901 NNS->getAsIdentifier());
2904 case NestedNameSpecifier::Namespace:
2905 case NestedNameSpecifier::NamespaceAlias:
2906 case NestedNameSpecifier::Global:
2907 llvm_unreachable("Nested-name-specifier must name a type");
2909 case NestedNameSpecifier::TypeSpec:
2910 case NestedNameSpecifier::TypeSpecWithTemplate:
2911 ClsType = QualType(NNS->getAsType(), 0);
2912 // Note: if the NNS has a prefix and ClsType is a nondependent
2913 // TemplateSpecializationType, then the NNS prefix is NOT included
2914 // in ClsType; hence we wrap ClsType into an ElaboratedType.
2915 // NOTE: in particular, no wrap occurs if ClsType already is an
2916 // Elaborated, DependentName, or DependentTemplateSpecialization.
2917 if (NNSPrefix && isa<TemplateSpecializationType>(NNS->getAsType()))
2918 ClsType = Context.getElaboratedType(ETK_None, NNSPrefix, ClsType);
2922 S.Diag(DeclType.Mem.Scope().getBeginLoc(),
2923 diag::err_illegal_decl_mempointer_in_nonclass)
2924 << (D.getIdentifier() ? D.getIdentifier()->getName() : "type name")
2925 << DeclType.Mem.Scope().getRange();
2926 D.setInvalidType(true);
2929 if (!ClsType.isNull())
2930 T = S.BuildMemberPointerType(T, ClsType, DeclType.Loc, D.getIdentifier());
2933 D.setInvalidType(true);
2934 } else if (DeclType.Mem.TypeQuals) {
2935 T = S.BuildQualifiedType(T, DeclType.Loc, DeclType.Mem.TypeQuals);
2941 D.setInvalidType(true);
2945 // See if there are any attributes on this declarator chunk.
2946 if (AttributeList *attrs = const_cast<AttributeList*>(DeclType.getAttrs()))
2947 processTypeAttrs(state, T, TAL_DeclChunk, attrs);
2950 if (LangOpts.CPlusPlus && T->isFunctionType()) {
2951 const FunctionProtoType *FnTy = T->getAs<FunctionProtoType>();
2952 assert(FnTy && "Why oh why is there not a FunctionProtoType here?");
2955 // A cv-qualifier-seq shall only be part of the function type
2956 // for a nonstatic member function, the function type to which a pointer
2957 // to member refers, or the top-level function type of a function typedef
2960 // Core issue 547 also allows cv-qualifiers on function types that are
2961 // top-level template type arguments.
2963 if (!D.getCXXScopeSpec().isSet()) {
2964 FreeFunction = ((D.getContext() != Declarator::MemberContext &&
2965 D.getContext() != Declarator::LambdaExprContext) ||
2966 D.getDeclSpec().isFriendSpecified());
2968 DeclContext *DC = S.computeDeclContext(D.getCXXScopeSpec());
2969 FreeFunction = (DC && !DC->isRecord());
2972 // C++11 [dcl.fct]p6 (w/DR1417):
2973 // An attempt to specify a function type with a cv-qualifier-seq or a
2974 // ref-qualifier (including by typedef-name) is ill-formed unless it is:
2975 // - the function type for a non-static member function,
2976 // - the function type to which a pointer to member refers,
2977 // - the top-level function type of a function typedef declaration or
2978 // alias-declaration,
2979 // - the type-id in the default argument of a type-parameter, or
2980 // - the type-id of a template-argument for a type-parameter
2981 if (IsQualifiedFunction &&
2983 D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_static) &&
2985 D.getContext() != Declarator::TemplateTypeArgContext) {
2986 SourceLocation Loc = D.getLocStart();
2987 SourceRange RemovalRange;
2989 if (D.isFunctionDeclarator(I)) {
2990 SmallVector<SourceLocation, 4> RemovalLocs;
2991 const DeclaratorChunk &Chunk = D.getTypeObject(I);
2992 assert(Chunk.Kind == DeclaratorChunk::Function);
2993 if (Chunk.Fun.hasRefQualifier())
2994 RemovalLocs.push_back(Chunk.Fun.getRefQualifierLoc());
2995 if (Chunk.Fun.TypeQuals & Qualifiers::Const)
2996 RemovalLocs.push_back(Chunk.Fun.getConstQualifierLoc());
2997 if (Chunk.Fun.TypeQuals & Qualifiers::Volatile)
2998 RemovalLocs.push_back(Chunk.Fun.getVolatileQualifierLoc());
2999 // FIXME: We do not track the location of the __restrict qualifier.
3000 //if (Chunk.Fun.TypeQuals & Qualifiers::Restrict)
3001 // RemovalLocs.push_back(Chunk.Fun.getRestrictQualifierLoc());
3002 if (!RemovalLocs.empty()) {
3003 std::sort(RemovalLocs.begin(), RemovalLocs.end(),
3004 BeforeThanCompare<SourceLocation>(S.getSourceManager()));
3005 RemovalRange = SourceRange(RemovalLocs.front(), RemovalLocs.back());
3006 Loc = RemovalLocs.front();
3010 S.Diag(Loc, diag::err_invalid_qualified_function_type)
3011 << FreeFunction << D.isFunctionDeclarator() << T
3012 << getFunctionQualifiersAsString(FnTy)
3013 << FixItHint::CreateRemoval(RemovalRange);
3015 // Strip the cv-qualifiers and ref-qualifiers from the type.
3016 FunctionProtoType::ExtProtoInfo EPI = FnTy->getExtProtoInfo();
3018 EPI.RefQualifier = RQ_None;
3020 T = Context.getFunctionType(FnTy->getResultType(),
3021 ArrayRef<QualType>(FnTy->arg_type_begin(),
3022 FnTy->getNumArgs()),
3024 // Rebuild any parens around the identifier in the function type.
3025 for (unsigned i = 0, e = D.getNumTypeObjects(); i != e; ++i) {
3026 if (D.getTypeObject(i).Kind != DeclaratorChunk::Paren)
3028 T = S.BuildParenType(T);
3033 // Apply any undistributed attributes from the declarator.
3035 if (AttributeList *attrs = D.getAttributes())
3036 processTypeAttrs(state, T, TAL_DeclName, attrs);
3038 // Diagnose any ignored type attributes.
3039 if (!T.isNull()) state.diagnoseIgnoredTypeAttrs(T);
3041 // C++0x [dcl.constexpr]p9:
3042 // A constexpr specifier used in an object declaration declares the object
3044 if (D.getDeclSpec().isConstexprSpecified() && T->isObjectType()) {
3048 // If there was an ellipsis in the declarator, the declaration declares a
3049 // parameter pack whose type may be a pack expansion type.
3050 if (D.hasEllipsis() && !T.isNull()) {
3051 // C++0x [dcl.fct]p13:
3052 // A declarator-id or abstract-declarator containing an ellipsis shall
3053 // only be used in a parameter-declaration. Such a parameter-declaration
3054 // is a parameter pack (14.5.3). [...]
3055 switch (D.getContext()) {
3056 case Declarator::PrototypeContext:
3057 // C++0x [dcl.fct]p13:
3058 // [...] When it is part of a parameter-declaration-clause, the
3059 // parameter pack is a function parameter pack (14.5.3). The type T
3060 // of the declarator-id of the function parameter pack shall contain
3061 // a template parameter pack; each template parameter pack in T is
3062 // expanded by the function parameter pack.
3064 // We represent function parameter packs as function parameters whose
3065 // type is a pack expansion.
3066 if (!T->containsUnexpandedParameterPack()) {
3067 S.Diag(D.getEllipsisLoc(),
3068 diag::err_function_parameter_pack_without_parameter_packs)
3069 << T << D.getSourceRange();
3070 D.setEllipsisLoc(SourceLocation());
3072 T = Context.getPackExpansionType(T, None);
3076 case Declarator::TemplateParamContext:
3077 // C++0x [temp.param]p15:
3078 // If a template-parameter is a [...] is a parameter-declaration that
3079 // declares a parameter pack (8.3.5), then the template-parameter is a
3080 // template parameter pack (14.5.3).
3082 // Note: core issue 778 clarifies that, if there are any unexpanded
3083 // parameter packs in the type of the non-type template parameter, then
3084 // it expands those parameter packs.
3085 if (T->containsUnexpandedParameterPack())
3086 T = Context.getPackExpansionType(T, None);
3088 S.Diag(D.getEllipsisLoc(),
3089 LangOpts.CPlusPlus11
3090 ? diag::warn_cxx98_compat_variadic_templates
3091 : diag::ext_variadic_templates);
3094 case Declarator::FileContext:
3095 case Declarator::KNRTypeListContext:
3096 case Declarator::ObjCParameterContext: // FIXME: special diagnostic here?
3097 case Declarator::ObjCResultContext: // FIXME: special diagnostic here?
3098 case Declarator::TypeNameContext:
3099 case Declarator::CXXNewContext:
3100 case Declarator::AliasDeclContext:
3101 case Declarator::AliasTemplateContext:
3102 case Declarator::MemberContext:
3103 case Declarator::BlockContext:
3104 case Declarator::ForContext:
3105 case Declarator::ConditionContext:
3106 case Declarator::CXXCatchContext:
3107 case Declarator::ObjCCatchContext:
3108 case Declarator::BlockLiteralContext:
3109 case Declarator::LambdaExprContext:
3110 case Declarator::ConversionIdContext:
3111 case Declarator::TrailingReturnContext:
3112 case Declarator::TemplateTypeArgContext:
3113 // FIXME: We may want to allow parameter packs in block-literal contexts
3115 S.Diag(D.getEllipsisLoc(), diag::err_ellipsis_in_declarator_not_parameter);
3116 D.setEllipsisLoc(SourceLocation());
3122 return Context.getNullTypeSourceInfo();
3123 else if (D.isInvalidType())
3124 return Context.getTrivialTypeSourceInfo(T);
3126 return S.GetTypeSourceInfoForDeclarator(D, T, TInfo);
3129 /// GetTypeForDeclarator - Convert the type for the specified
3130 /// declarator to Type instances.
3132 /// The result of this call will never be null, but the associated
3133 /// type may be a null type if there's an unrecoverable error.
3134 TypeSourceInfo *Sema::GetTypeForDeclarator(Declarator &D, Scope *S) {
3135 // Determine the type of the declarator. Not all forms of declarator
3138 TypeProcessingState state(*this, D);
3140 TypeSourceInfo *ReturnTypeInfo = 0;
3141 QualType T = GetDeclSpecTypeForDeclarator(state, ReturnTypeInfo);
3143 return Context.getNullTypeSourceInfo();
3145 if (D.isPrototypeContext() && getLangOpts().ObjCAutoRefCount)
3146 inferARCWriteback(state, T);
3148 return GetFullTypeForDeclarator(state, T, ReturnTypeInfo);
3151 static void transferARCOwnershipToDeclSpec(Sema &S,
3152 QualType &declSpecTy,
3153 Qualifiers::ObjCLifetime ownership) {
3154 if (declSpecTy->isObjCRetainableType() &&
3155 declSpecTy.getObjCLifetime() == Qualifiers::OCL_None) {
3157 qs.addObjCLifetime(ownership);
3158 declSpecTy = S.Context.getQualifiedType(declSpecTy, qs);
3162 static void transferARCOwnershipToDeclaratorChunk(TypeProcessingState &state,
3163 Qualifiers::ObjCLifetime ownership,
3164 unsigned chunkIndex) {
3165 Sema &S = state.getSema();
3166 Declarator &D = state.getDeclarator();
3168 // Look for an explicit lifetime attribute.
3169 DeclaratorChunk &chunk = D.getTypeObject(chunkIndex);
3170 for (const AttributeList *attr = chunk.getAttrs(); attr;
3171 attr = attr->getNext())
3172 if (attr->getKind() == AttributeList::AT_ObjCOwnership)
3175 const char *attrStr = 0;
3176 switch (ownership) {
3177 case Qualifiers::OCL_None: llvm_unreachable("no ownership!");
3178 case Qualifiers::OCL_ExplicitNone: attrStr = "none"; break;
3179 case Qualifiers::OCL_Strong: attrStr = "strong"; break;
3180 case Qualifiers::OCL_Weak: attrStr = "weak"; break;
3181 case Qualifiers::OCL_Autoreleasing: attrStr = "autoreleasing"; break;
3184 // If there wasn't one, add one (with an invalid source location
3185 // so that we don't make an AttributedType for it).
3186 AttributeList *attr = D.getAttributePool()
3187 .create(&S.Context.Idents.get("objc_ownership"), SourceLocation(),
3188 /*scope*/ 0, SourceLocation(),
3189 &S.Context.Idents.get(attrStr), SourceLocation(),
3190 /*args*/ 0, 0, AttributeList::AS_GNU);
3191 spliceAttrIntoList(*attr, chunk.getAttrListRef());
3193 // TODO: mark whether we did this inference?
3196 /// \brief Used for transferring ownership in casts resulting in l-values.
3197 static void transferARCOwnership(TypeProcessingState &state,
3198 QualType &declSpecTy,
3199 Qualifiers::ObjCLifetime ownership) {
3200 Sema &S = state.getSema();
3201 Declarator &D = state.getDeclarator();
3204 bool hasIndirection = false;
3205 for (unsigned i = 0, e = D.getNumTypeObjects(); i != e; ++i) {
3206 DeclaratorChunk &chunk = D.getTypeObject(i);
3207 switch (chunk.Kind) {
3208 case DeclaratorChunk::Paren:
3212 case DeclaratorChunk::Array:
3213 case DeclaratorChunk::Reference:
3214 case DeclaratorChunk::Pointer:
3216 hasIndirection = true;
3220 case DeclaratorChunk::BlockPointer:
3222 transferARCOwnershipToDeclaratorChunk(state, ownership, i);
3225 case DeclaratorChunk::Function:
3226 case DeclaratorChunk::MemberPointer:
3234 DeclaratorChunk &chunk = D.getTypeObject(inner);
3235 if (chunk.Kind == DeclaratorChunk::Pointer) {
3236 if (declSpecTy->isObjCRetainableType())
3237 return transferARCOwnershipToDeclSpec(S, declSpecTy, ownership);
3238 if (declSpecTy->isObjCObjectType() && hasIndirection)
3239 return transferARCOwnershipToDeclaratorChunk(state, ownership, inner);
3241 assert(chunk.Kind == DeclaratorChunk::Array ||
3242 chunk.Kind == DeclaratorChunk::Reference);
3243 return transferARCOwnershipToDeclSpec(S, declSpecTy, ownership);
3247 TypeSourceInfo *Sema::GetTypeForDeclaratorCast(Declarator &D, QualType FromTy) {
3248 TypeProcessingState state(*this, D);
3250 TypeSourceInfo *ReturnTypeInfo = 0;
3251 QualType declSpecTy = GetDeclSpecTypeForDeclarator(state, ReturnTypeInfo);
3252 if (declSpecTy.isNull())
3253 return Context.getNullTypeSourceInfo();
3255 if (getLangOpts().ObjCAutoRefCount) {
3256 Qualifiers::ObjCLifetime ownership = Context.getInnerObjCOwnership(FromTy);
3257 if (ownership != Qualifiers::OCL_None)
3258 transferARCOwnership(state, declSpecTy, ownership);
3261 return GetFullTypeForDeclarator(state, declSpecTy, ReturnTypeInfo);
3264 /// Map an AttributedType::Kind to an AttributeList::Kind.
3265 static AttributeList::Kind getAttrListKind(AttributedType::Kind kind) {
3267 case AttributedType::attr_address_space:
3268 return AttributeList::AT_AddressSpace;
3269 case AttributedType::attr_regparm:
3270 return AttributeList::AT_Regparm;
3271 case AttributedType::attr_vector_size:
3272 return AttributeList::AT_VectorSize;
3273 case AttributedType::attr_neon_vector_type:
3274 return AttributeList::AT_NeonVectorType;
3275 case AttributedType::attr_neon_polyvector_type:
3276 return AttributeList::AT_NeonPolyVectorType;
3277 case AttributedType::attr_objc_gc:
3278 return AttributeList::AT_ObjCGC;
3279 case AttributedType::attr_objc_ownership:
3280 return AttributeList::AT_ObjCOwnership;
3281 case AttributedType::attr_noreturn:
3282 return AttributeList::AT_NoReturn;
3283 case AttributedType::attr_cdecl:
3284 return AttributeList::AT_CDecl;
3285 case AttributedType::attr_fastcall:
3286 return AttributeList::AT_FastCall;
3287 case AttributedType::attr_stdcall:
3288 return AttributeList::AT_StdCall;
3289 case AttributedType::attr_thiscall:
3290 return AttributeList::AT_ThisCall;
3291 case AttributedType::attr_pascal:
3292 return AttributeList::AT_Pascal;
3293 case AttributedType::attr_pcs:
3294 return AttributeList::AT_Pcs;
3295 case AttributedType::attr_pnaclcall:
3296 return AttributeList::AT_PnaclCall;
3297 case AttributedType::attr_inteloclbicc:
3298 return AttributeList::AT_IntelOclBicc;
3300 llvm_unreachable("unexpected attribute kind!");
3303 static void fillAttributedTypeLoc(AttributedTypeLoc TL,
3304 const AttributeList *attrs) {
3305 AttributedType::Kind kind = TL.getAttrKind();
3307 assert(attrs && "no type attributes in the expected location!");
3308 AttributeList::Kind parsedKind = getAttrListKind(kind);
3309 while (attrs->getKind() != parsedKind) {
3310 attrs = attrs->getNext();
3311 assert(attrs && "no matching attribute in expected location!");
3314 TL.setAttrNameLoc(attrs->getLoc());
3315 if (TL.hasAttrExprOperand())
3316 TL.setAttrExprOperand(attrs->getArg(0));
3317 else if (TL.hasAttrEnumOperand())
3318 TL.setAttrEnumOperandLoc(attrs->getParameterLoc());
3320 // FIXME: preserve this information to here.
3321 if (TL.hasAttrOperand())
3322 TL.setAttrOperandParensRange(SourceRange());
3326 class TypeSpecLocFiller : public TypeLocVisitor<TypeSpecLocFiller> {
3327 ASTContext &Context;
3331 TypeSpecLocFiller(ASTContext &Context, const DeclSpec &DS)
3332 : Context(Context), DS(DS) {}
3334 void VisitAttributedTypeLoc(AttributedTypeLoc TL) {
3335 fillAttributedTypeLoc(TL, DS.getAttributes().getList());
3336 Visit(TL.getModifiedLoc());
3338 void VisitQualifiedTypeLoc(QualifiedTypeLoc TL) {
3339 Visit(TL.getUnqualifiedLoc());
3341 void VisitTypedefTypeLoc(TypedefTypeLoc TL) {
3342 TL.setNameLoc(DS.getTypeSpecTypeLoc());
3344 void VisitObjCInterfaceTypeLoc(ObjCInterfaceTypeLoc TL) {
3345 TL.setNameLoc(DS.getTypeSpecTypeLoc());
3346 // FIXME. We should have DS.getTypeSpecTypeEndLoc(). But, it requires
3347 // addition field. What we have is good enough for dispay of location
3348 // of 'fixit' on interface name.
3349 TL.setNameEndLoc(DS.getLocEnd());
3351 void VisitObjCObjectTypeLoc(ObjCObjectTypeLoc TL) {
3352 // Handle the base type, which might not have been written explicitly.
3353 if (DS.getTypeSpecType() == DeclSpec::TST_unspecified) {
3354 TL.setHasBaseTypeAsWritten(false);
3355 TL.getBaseLoc().initialize(Context, SourceLocation());
3357 TL.setHasBaseTypeAsWritten(true);
3358 Visit(TL.getBaseLoc());
3361 // Protocol qualifiers.
3362 if (DS.getProtocolQualifiers()) {
3363 assert(TL.getNumProtocols() > 0);
3364 assert(TL.getNumProtocols() == DS.getNumProtocolQualifiers());
3365 TL.setLAngleLoc(DS.getProtocolLAngleLoc());
3366 TL.setRAngleLoc(DS.getSourceRange().getEnd());
3367 for (unsigned i = 0, e = DS.getNumProtocolQualifiers(); i != e; ++i)
3368 TL.setProtocolLoc(i, DS.getProtocolLocs()[i]);
3370 assert(TL.getNumProtocols() == 0);
3371 TL.setLAngleLoc(SourceLocation());
3372 TL.setRAngleLoc(SourceLocation());
3375 void VisitObjCObjectPointerTypeLoc(ObjCObjectPointerTypeLoc TL) {
3376 TL.setStarLoc(SourceLocation());
3377 Visit(TL.getPointeeLoc());
3379 void VisitTemplateSpecializationTypeLoc(TemplateSpecializationTypeLoc TL) {
3380 TypeSourceInfo *TInfo = 0;
3381 Sema::GetTypeFromParser(DS.getRepAsType(), &TInfo);
3383 // If we got no declarator info from previous Sema routines,
3384 // just fill with the typespec loc.
3386 TL.initialize(Context, DS.getTypeSpecTypeNameLoc());
3390 TypeLoc OldTL = TInfo->getTypeLoc();
3391 if (TInfo->getType()->getAs<ElaboratedType>()) {
3392 ElaboratedTypeLoc ElabTL = OldTL.castAs<ElaboratedTypeLoc>();
3393 TemplateSpecializationTypeLoc NamedTL = ElabTL.getNamedTypeLoc()
3394 .castAs<TemplateSpecializationTypeLoc>();
3398 TL.copy(OldTL.castAs<TemplateSpecializationTypeLoc>());
3400 void VisitTypeOfExprTypeLoc(TypeOfExprTypeLoc TL) {
3401 assert(DS.getTypeSpecType() == DeclSpec::TST_typeofExpr);
3402 TL.setTypeofLoc(DS.getTypeSpecTypeLoc());
3403 TL.setParensRange(DS.getTypeofParensRange());
3405 void VisitTypeOfTypeLoc(TypeOfTypeLoc TL) {
3406 assert(DS.getTypeSpecType() == DeclSpec::TST_typeofType);
3407 TL.setTypeofLoc(DS.getTypeSpecTypeLoc());
3408 TL.setParensRange(DS.getTypeofParensRange());
3409 assert(DS.getRepAsType());
3410 TypeSourceInfo *TInfo = 0;
3411 Sema::GetTypeFromParser(DS.getRepAsType(), &TInfo);
3412 TL.setUnderlyingTInfo(TInfo);
3414 void VisitUnaryTransformTypeLoc(UnaryTransformTypeLoc TL) {
3415 // FIXME: This holds only because we only have one unary transform.
3416 assert(DS.getTypeSpecType() == DeclSpec::TST_underlyingType);
3417 TL.setKWLoc(DS.getTypeSpecTypeLoc());
3418 TL.setParensRange(DS.getTypeofParensRange());
3419 assert(DS.getRepAsType());
3420 TypeSourceInfo *TInfo = 0;
3421 Sema::GetTypeFromParser(DS.getRepAsType(), &TInfo);
3422 TL.setUnderlyingTInfo(TInfo);
3424 void VisitBuiltinTypeLoc(BuiltinTypeLoc TL) {
3425 // By default, use the source location of the type specifier.
3426 TL.setBuiltinLoc(DS.getTypeSpecTypeLoc());
3427 if (TL.needsExtraLocalData()) {
3428 // Set info for the written builtin specifiers.
3429 TL.getWrittenBuiltinSpecs() = DS.getWrittenBuiltinSpecs();
3430 // Try to have a meaningful source location.
3431 if (TL.getWrittenSignSpec() != TSS_unspecified)
3432 // Sign spec loc overrides the others (e.g., 'unsigned long').
3433 TL.setBuiltinLoc(DS.getTypeSpecSignLoc());
3434 else if (TL.getWrittenWidthSpec() != TSW_unspecified)
3435 // Width spec loc overrides type spec loc (e.g., 'short int').
3436 TL.setBuiltinLoc(DS.getTypeSpecWidthLoc());
3439 void VisitElaboratedTypeLoc(ElaboratedTypeLoc TL) {
3440 ElaboratedTypeKeyword Keyword
3441 = TypeWithKeyword::getKeywordForTypeSpec(DS.getTypeSpecType());
3442 if (DS.getTypeSpecType() == TST_typename) {
3443 TypeSourceInfo *TInfo = 0;
3444 Sema::GetTypeFromParser(DS.getRepAsType(), &TInfo);
3446 TL.copy(TInfo->getTypeLoc().castAs<ElaboratedTypeLoc>());
3450 TL.setElaboratedKeywordLoc(Keyword != ETK_None
3451 ? DS.getTypeSpecTypeLoc()
3452 : SourceLocation());
3453 const CXXScopeSpec& SS = DS.getTypeSpecScope();
3454 TL.setQualifierLoc(SS.getWithLocInContext(Context));
3455 Visit(TL.getNextTypeLoc().getUnqualifiedLoc());
3457 void VisitDependentNameTypeLoc(DependentNameTypeLoc TL) {
3458 assert(DS.getTypeSpecType() == TST_typename);
3459 TypeSourceInfo *TInfo = 0;
3460 Sema::GetTypeFromParser(DS.getRepAsType(), &TInfo);
3462 TL.copy(TInfo->getTypeLoc().castAs<DependentNameTypeLoc>());
3464 void VisitDependentTemplateSpecializationTypeLoc(
3465 DependentTemplateSpecializationTypeLoc TL) {
3466 assert(DS.getTypeSpecType() == TST_typename);
3467 TypeSourceInfo *TInfo = 0;
3468 Sema::GetTypeFromParser(DS.getRepAsType(), &TInfo);
3471 TInfo->getTypeLoc().castAs<DependentTemplateSpecializationTypeLoc>());
3473 void VisitTagTypeLoc(TagTypeLoc TL) {
3474 TL.setNameLoc(DS.getTypeSpecTypeNameLoc());
3476 void VisitAtomicTypeLoc(AtomicTypeLoc TL) {
3477 // An AtomicTypeLoc can come from either an _Atomic(...) type specifier
3478 // or an _Atomic qualifier.
3479 if (DS.getTypeSpecType() == DeclSpec::TST_atomic) {
3480 TL.setKWLoc(DS.getTypeSpecTypeLoc());
3481 TL.setParensRange(DS.getTypeofParensRange());
3483 TypeSourceInfo *TInfo = 0;
3484 Sema::GetTypeFromParser(DS.getRepAsType(), &TInfo);
3486 TL.getValueLoc().initializeFullCopy(TInfo->getTypeLoc());
3488 TL.setKWLoc(DS.getAtomicSpecLoc());
3489 // No parens, to indicate this was spelled as an _Atomic qualifier.
3490 TL.setParensRange(SourceRange());
3491 Visit(TL.getValueLoc());
3495 void VisitTypeLoc(TypeLoc TL) {
3496 // FIXME: add other typespec types and change this to an assert.
3497 TL.initialize(Context, DS.getTypeSpecTypeLoc());
3501 class DeclaratorLocFiller : public TypeLocVisitor<DeclaratorLocFiller> {
3502 ASTContext &Context;
3503 const DeclaratorChunk &Chunk;
3506 DeclaratorLocFiller(ASTContext &Context, const DeclaratorChunk &Chunk)
3507 : Context(Context), Chunk(Chunk) {}
3509 void VisitQualifiedTypeLoc(QualifiedTypeLoc TL) {
3510 llvm_unreachable("qualified type locs not expected here!");
3513 void VisitAttributedTypeLoc(AttributedTypeLoc TL) {
3514 fillAttributedTypeLoc(TL, Chunk.getAttrs());
3516 void VisitBlockPointerTypeLoc(BlockPointerTypeLoc TL) {
3517 assert(Chunk.Kind == DeclaratorChunk::BlockPointer);
3518 TL.setCaretLoc(Chunk.Loc);
3520 void VisitPointerTypeLoc(PointerTypeLoc TL) {
3521 assert(Chunk.Kind == DeclaratorChunk::Pointer);
3522 TL.setStarLoc(Chunk.Loc);
3524 void VisitObjCObjectPointerTypeLoc(ObjCObjectPointerTypeLoc TL) {
3525 assert(Chunk.Kind == DeclaratorChunk::Pointer);
3526 TL.setStarLoc(Chunk.Loc);
3528 void VisitMemberPointerTypeLoc(MemberPointerTypeLoc TL) {
3529 assert(Chunk.Kind == DeclaratorChunk::MemberPointer);
3530 const CXXScopeSpec& SS = Chunk.Mem.Scope();
3531 NestedNameSpecifierLoc NNSLoc = SS.getWithLocInContext(Context);
3533 const Type* ClsTy = TL.getClass();
3534 QualType ClsQT = QualType(ClsTy, 0);
3535 TypeSourceInfo *ClsTInfo = Context.CreateTypeSourceInfo(ClsQT, 0);
3536 // Now copy source location info into the type loc component.
3537 TypeLoc ClsTL = ClsTInfo->getTypeLoc();
3538 switch (NNSLoc.getNestedNameSpecifier()->getKind()) {
3539 case NestedNameSpecifier::Identifier:
3540 assert(isa<DependentNameType>(ClsTy) && "Unexpected TypeLoc");
3542 DependentNameTypeLoc DNTLoc = ClsTL.castAs<DependentNameTypeLoc>();
3543 DNTLoc.setElaboratedKeywordLoc(SourceLocation());
3544 DNTLoc.setQualifierLoc(NNSLoc.getPrefix());
3545 DNTLoc.setNameLoc(NNSLoc.getLocalBeginLoc());
3549 case NestedNameSpecifier::TypeSpec:
3550 case NestedNameSpecifier::TypeSpecWithTemplate:
3551 if (isa<ElaboratedType>(ClsTy)) {
3552 ElaboratedTypeLoc ETLoc = ClsTL.castAs<ElaboratedTypeLoc>();
3553 ETLoc.setElaboratedKeywordLoc(SourceLocation());
3554 ETLoc.setQualifierLoc(NNSLoc.getPrefix());
3555 TypeLoc NamedTL = ETLoc.getNamedTypeLoc();
3556 NamedTL.initializeFullCopy(NNSLoc.getTypeLoc());
3558 ClsTL.initializeFullCopy(NNSLoc.getTypeLoc());
3562 case NestedNameSpecifier::Namespace:
3563 case NestedNameSpecifier::NamespaceAlias:
3564 case NestedNameSpecifier::Global:
3565 llvm_unreachable("Nested-name-specifier must name a type");
3568 // Finally fill in MemberPointerLocInfo fields.
3569 TL.setStarLoc(Chunk.Loc);
3570 TL.setClassTInfo(ClsTInfo);
3572 void VisitLValueReferenceTypeLoc(LValueReferenceTypeLoc TL) {
3573 assert(Chunk.Kind == DeclaratorChunk::Reference);
3574 // 'Amp' is misleading: this might have been originally
3575 /// spelled with AmpAmp.
3576 TL.setAmpLoc(Chunk.Loc);
3578 void VisitRValueReferenceTypeLoc(RValueReferenceTypeLoc TL) {
3579 assert(Chunk.Kind == DeclaratorChunk::Reference);
3580 assert(!Chunk.Ref.LValueRef);
3581 TL.setAmpAmpLoc(Chunk.Loc);
3583 void VisitArrayTypeLoc(ArrayTypeLoc TL) {
3584 assert(Chunk.Kind == DeclaratorChunk::Array);
3585 TL.setLBracketLoc(Chunk.Loc);
3586 TL.setRBracketLoc(Chunk.EndLoc);
3587 TL.setSizeExpr(static_cast<Expr*>(Chunk.Arr.NumElts));
3589 void VisitFunctionTypeLoc(FunctionTypeLoc TL) {
3590 assert(Chunk.Kind == DeclaratorChunk::Function);
3591 TL.setLocalRangeBegin(Chunk.Loc);
3592 TL.setLocalRangeEnd(Chunk.EndLoc);
3594 const DeclaratorChunk::FunctionTypeInfo &FTI = Chunk.Fun;
3595 TL.setLParenLoc(FTI.getLParenLoc());
3596 TL.setRParenLoc(FTI.getRParenLoc());
3597 for (unsigned i = 0, e = TL.getNumArgs(), tpi = 0; i != e; ++i) {
3598 ParmVarDecl *Param = cast<ParmVarDecl>(FTI.ArgInfo[i].Param);
3599 TL.setArg(tpi++, Param);
3601 // FIXME: exception specs
3603 void VisitParenTypeLoc(ParenTypeLoc TL) {
3604 assert(Chunk.Kind == DeclaratorChunk::Paren);
3605 TL.setLParenLoc(Chunk.Loc);
3606 TL.setRParenLoc(Chunk.EndLoc);
3609 void VisitTypeLoc(TypeLoc TL) {
3610 llvm_unreachable("unsupported TypeLoc kind in declarator!");
3615 static void fillAtomicQualLoc(AtomicTypeLoc ATL, const DeclaratorChunk &Chunk) {
3617 switch (Chunk.Kind) {
3618 case DeclaratorChunk::Function:
3619 case DeclaratorChunk::Array:
3620 case DeclaratorChunk::Paren:
3621 llvm_unreachable("cannot be _Atomic qualified");
3623 case DeclaratorChunk::Pointer:
3624 Loc = SourceLocation::getFromRawEncoding(Chunk.Ptr.AtomicQualLoc);
3627 case DeclaratorChunk::BlockPointer:
3628 case DeclaratorChunk::Reference:
3629 case DeclaratorChunk::MemberPointer:
3630 // FIXME: Provide a source location for the _Atomic keyword.
3635 ATL.setParensRange(SourceRange());
3638 /// \brief Create and instantiate a TypeSourceInfo with type source information.
3640 /// \param T QualType referring to the type as written in source code.
3642 /// \param ReturnTypeInfo For declarators whose return type does not show
3643 /// up in the normal place in the declaration specifiers (such as a C++
3644 /// conversion function), this pointer will refer to a type source information
3645 /// for that return type.
3647 Sema::GetTypeSourceInfoForDeclarator(Declarator &D, QualType T,
3648 TypeSourceInfo *ReturnTypeInfo) {
3649 TypeSourceInfo *TInfo = Context.CreateTypeSourceInfo(T);
3650 UnqualTypeLoc CurrTL = TInfo->getTypeLoc().getUnqualifiedLoc();
3652 // Handle parameter packs whose type is a pack expansion.
3653 if (isa<PackExpansionType>(T)) {
3654 CurrTL.castAs<PackExpansionTypeLoc>().setEllipsisLoc(D.getEllipsisLoc());
3655 CurrTL = CurrTL.getNextTypeLoc().getUnqualifiedLoc();
3658 for (unsigned i = 0, e = D.getNumTypeObjects(); i != e; ++i) {
3659 // An AtomicTypeLoc might be produced by an atomic qualifier in this
3660 // declarator chunk.
3661 if (AtomicTypeLoc ATL = CurrTL.getAs<AtomicTypeLoc>()) {
3662 fillAtomicQualLoc(ATL, D.getTypeObject(i));
3663 CurrTL = ATL.getValueLoc().getUnqualifiedLoc();
3666 while (AttributedTypeLoc TL = CurrTL.getAs<AttributedTypeLoc>()) {
3667 fillAttributedTypeLoc(TL, D.getTypeObject(i).getAttrs());
3668 CurrTL = TL.getNextTypeLoc().getUnqualifiedLoc();
3671 DeclaratorLocFiller(Context, D.getTypeObject(i)).Visit(CurrTL);
3672 CurrTL = CurrTL.getNextTypeLoc().getUnqualifiedLoc();
3675 // If we have different source information for the return type, use
3676 // that. This really only applies to C++ conversion functions.
3677 if (ReturnTypeInfo) {
3678 TypeLoc TL = ReturnTypeInfo->getTypeLoc();
3679 assert(TL.getFullDataSize() == CurrTL.getFullDataSize());
3680 memcpy(CurrTL.getOpaqueData(), TL.getOpaqueData(), TL.getFullDataSize());
3682 TypeSpecLocFiller(Context, D.getDeclSpec()).Visit(CurrTL);
3688 /// \brief Create a LocInfoType to hold the given QualType and TypeSourceInfo.
3689 ParsedType Sema::CreateParsedType(QualType T, TypeSourceInfo *TInfo) {
3690 // FIXME: LocInfoTypes are "transient", only needed for passing to/from Parser
3691 // and Sema during declaration parsing. Try deallocating/caching them when
3692 // it's appropriate, instead of allocating them and keeping them around.
3693 LocInfoType *LocT = (LocInfoType*)BumpAlloc.Allocate(sizeof(LocInfoType),
3695 new (LocT) LocInfoType(T, TInfo);
3696 assert(LocT->getTypeClass() != T->getTypeClass() &&
3697 "LocInfoType's TypeClass conflicts with an existing Type class");
3698 return ParsedType::make(QualType(LocT, 0));
3701 void LocInfoType::getAsStringInternal(std::string &Str,
3702 const PrintingPolicy &Policy) const {
3703 llvm_unreachable("LocInfoType leaked into the type system; an opaque TypeTy*"
3704 " was used directly instead of getting the QualType through"
3705 " GetTypeFromParser");
3708 TypeResult Sema::ActOnTypeName(Scope *S, Declarator &D) {
3709 // C99 6.7.6: Type names have no identifier. This is already validated by
3711 assert(D.getIdentifier() == 0 && "Type name should have no identifier!");
3713 TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S);
3714 QualType T = TInfo->getType();
3715 if (D.isInvalidType())
3718 // Make sure there are no unused decl attributes on the declarator.
3719 // We don't want to do this for ObjC parameters because we're going
3720 // to apply them to the actual parameter declaration.
3721 // Likewise, we don't want to do this for alias declarations, because
3722 // we are actually going to build a declaration from this eventually.
3723 if (D.getContext() != Declarator::ObjCParameterContext &&
3724 D.getContext() != Declarator::AliasDeclContext &&
3725 D.getContext() != Declarator::AliasTemplateContext)
3726 checkUnusedDeclAttributes(D);
3728 if (getLangOpts().CPlusPlus) {
3729 // Check that there are no default arguments (C++ only).
3730 CheckExtraCXXDefaultArguments(D);
3733 return CreateParsedType(T, TInfo);
3736 ParsedType Sema::ActOnObjCInstanceType(SourceLocation Loc) {
3737 QualType T = Context.getObjCInstanceType();
3738 TypeSourceInfo *TInfo = Context.getTrivialTypeSourceInfo(T, Loc);
3739 return CreateParsedType(T, TInfo);
3743 //===----------------------------------------------------------------------===//
3744 // Type Attribute Processing
3745 //===----------------------------------------------------------------------===//
3747 /// HandleAddressSpaceTypeAttribute - Process an address_space attribute on the
3748 /// specified type. The attribute contains 1 argument, the id of the address
3749 /// space for the type.
3750 static void HandleAddressSpaceTypeAttribute(QualType &Type,
3751 const AttributeList &Attr, Sema &S){
3753 // If this type is already address space qualified, reject it.
3754 // ISO/IEC TR 18037 S5.3 (amending C99 6.7.3): "No type shall be qualified by
3755 // qualifiers for two or more different address spaces."
3756 if (Type.getAddressSpace()) {
3757 S.Diag(Attr.getLoc(), diag::err_attribute_address_multiple_qualifiers);
3762 // ISO/IEC TR 18037 S5.3 (amending C99 6.7.3): "A function type shall not be
3763 // qualified by an address-space qualifier."
3764 if (Type->isFunctionType()) {
3765 S.Diag(Attr.getLoc(), diag::err_attribute_address_function_type);
3770 // Check the attribute arguments.
3771 if (Attr.getNumArgs() != 1) {
3772 S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1;
3776 Expr *ASArgExpr = static_cast<Expr *>(Attr.getArg(0));
3777 llvm::APSInt addrSpace(32);
3778 if (ASArgExpr->isTypeDependent() || ASArgExpr->isValueDependent() ||
3779 !ASArgExpr->isIntegerConstantExpr(addrSpace, S.Context)) {
3780 S.Diag(Attr.getLoc(), diag::err_attribute_address_space_not_int)
3781 << ASArgExpr->getSourceRange();
3787 if (addrSpace.isSigned()) {
3788 if (addrSpace.isNegative()) {
3789 S.Diag(Attr.getLoc(), diag::err_attribute_address_space_negative)
3790 << ASArgExpr->getSourceRange();
3794 addrSpace.setIsSigned(false);
3796 llvm::APSInt max(addrSpace.getBitWidth());
3797 max = Qualifiers::MaxAddressSpace;
3798 if (addrSpace > max) {
3799 S.Diag(Attr.getLoc(), diag::err_attribute_address_space_too_high)
3800 << Qualifiers::MaxAddressSpace << ASArgExpr->getSourceRange();
3805 unsigned ASIdx = static_cast<unsigned>(addrSpace.getZExtValue());
3806 Type = S.Context.getAddrSpaceQualType(Type, ASIdx);
3809 /// Does this type have a "direct" ownership qualifier? That is,
3810 /// is it written like "__strong id", as opposed to something like
3811 /// "typeof(foo)", where that happens to be strong?
3812 static bool hasDirectOwnershipQualifier(QualType type) {
3813 // Fast path: no qualifier at all.
3814 assert(type.getQualifiers().hasObjCLifetime());
3818 if (const AttributedType *attr = dyn_cast<AttributedType>(type)) {
3819 if (attr->getAttrKind() == AttributedType::attr_objc_ownership)
3822 type = attr->getModifiedType();
3824 // X *__strong (...)
3825 } else if (const ParenType *paren = dyn_cast<ParenType>(type)) {
3826 type = paren->getInnerType();
3828 // That's it for things we want to complain about. In particular,
3829 // we do not want to look through typedefs, typeof(expr),
3830 // typeof(type), or any other way that the type is somehow
3839 /// handleObjCOwnershipTypeAttr - Process an objc_ownership
3840 /// attribute on the specified type.
3842 /// Returns 'true' if the attribute was handled.
3843 static bool handleObjCOwnershipTypeAttr(TypeProcessingState &state,
3844 AttributeList &attr,
3846 bool NonObjCPointer = false;
3848 if (!type->isDependentType() && !type->isUndeducedType()) {
3849 if (const PointerType *ptr = type->getAs<PointerType>()) {
3850 QualType pointee = ptr->getPointeeType();
3851 if (pointee->isObjCRetainableType() || pointee->isPointerType())
3853 // It is important not to lose the source info that there was an attribute
3854 // applied to non-objc pointer. We will create an attributed type but
3855 // its type will be the same as the original type.
3856 NonObjCPointer = true;
3857 } else if (!type->isObjCRetainableType()) {
3861 // Don't accept an ownership attribute in the declspec if it would
3862 // just be the return type of a block pointer.
3863 if (state.isProcessingDeclSpec()) {
3864 Declarator &D = state.getDeclarator();
3865 if (maybeMovePastReturnType(D, D.getNumTypeObjects()))
3870 Sema &S = state.getSema();
3871 SourceLocation AttrLoc = attr.getLoc();
3872 if (AttrLoc.isMacroID())
3873 AttrLoc = S.getSourceManager().getImmediateExpansionRange(AttrLoc).first;
3875 if (!attr.getParameterName()) {
3876 S.Diag(AttrLoc, diag::err_attribute_argument_n_not_string)
3877 << "objc_ownership" << 1;
3882 // Consume lifetime attributes without further comment outside of
3884 if (!S.getLangOpts().ObjCAutoRefCount)
3887 Qualifiers::ObjCLifetime lifetime;
3888 if (attr.getParameterName()->isStr("none"))
3889 lifetime = Qualifiers::OCL_ExplicitNone;
3890 else if (attr.getParameterName()->isStr("strong"))
3891 lifetime = Qualifiers::OCL_Strong;
3892 else if (attr.getParameterName()->isStr("weak"))
3893 lifetime = Qualifiers::OCL_Weak;
3894 else if (attr.getParameterName()->isStr("autoreleasing"))
3895 lifetime = Qualifiers::OCL_Autoreleasing;
3897 S.Diag(AttrLoc, diag::warn_attribute_type_not_supported)
3898 << "objc_ownership" << attr.getParameterName();
3903 SplitQualType underlyingType = type.split();
3905 // Check for redundant/conflicting ownership qualifiers.
3906 if (Qualifiers::ObjCLifetime previousLifetime
3907 = type.getQualifiers().getObjCLifetime()) {
3908 // If it's written directly, that's an error.
3909 if (hasDirectOwnershipQualifier(type)) {
3910 S.Diag(AttrLoc, diag::err_attr_objc_ownership_redundant)
3915 // Otherwise, if the qualifiers actually conflict, pull sugar off
3916 // until we reach a type that is directly qualified.
3917 if (previousLifetime != lifetime) {
3918 // This should always terminate: the canonical type is
3919 // qualified, so some bit of sugar must be hiding it.
3920 while (!underlyingType.Quals.hasObjCLifetime()) {
3921 underlyingType = underlyingType.getSingleStepDesugaredType();
3923 underlyingType.Quals.removeObjCLifetime();
3927 underlyingType.Quals.addObjCLifetime(lifetime);
3929 if (NonObjCPointer) {
3930 StringRef name = attr.getName()->getName();
3932 case Qualifiers::OCL_None:
3933 case Qualifiers::OCL_ExplicitNone:
3935 case Qualifiers::OCL_Strong: name = "__strong"; break;
3936 case Qualifiers::OCL_Weak: name = "__weak"; break;
3937 case Qualifiers::OCL_Autoreleasing: name = "__autoreleasing"; break;
3939 S.Diag(AttrLoc, diag::warn_objc_object_attribute_wrong_type)
3943 QualType origType = type;
3944 if (!NonObjCPointer)
3945 type = S.Context.getQualifiedType(underlyingType);
3947 // If we have a valid source location for the attribute, use an
3948 // AttributedType instead.
3949 if (AttrLoc.isValid())
3950 type = S.Context.getAttributedType(AttributedType::attr_objc_ownership,
3953 // Forbid __weak if the runtime doesn't support it.
3954 if (lifetime == Qualifiers::OCL_Weak &&
3955 !S.getLangOpts().ObjCARCWeak && !NonObjCPointer) {
3957 // Actually, delay this until we know what we're parsing.
3958 if (S.DelayedDiagnostics.shouldDelayDiagnostics()) {
3959 S.DelayedDiagnostics.add(
3960 sema::DelayedDiagnostic::makeForbiddenType(
3961 S.getSourceManager().getExpansionLoc(AttrLoc),
3962 diag::err_arc_weak_no_runtime, type, /*ignored*/ 0));
3964 S.Diag(AttrLoc, diag::err_arc_weak_no_runtime);
3971 // Forbid __weak for class objects marked as
3972 // objc_arc_weak_reference_unavailable
3973 if (lifetime == Qualifiers::OCL_Weak) {
3974 if (const ObjCObjectPointerType *ObjT =
3975 type->getAs<ObjCObjectPointerType>()) {
3976 if (ObjCInterfaceDecl *Class = ObjT->getInterfaceDecl()) {
3977 if (Class->isArcWeakrefUnavailable()) {
3978 S.Diag(AttrLoc, diag::err_arc_unsupported_weak_class);
3979 S.Diag(ObjT->getInterfaceDecl()->getLocation(),
3980 diag::note_class_declared);
3989 /// handleObjCGCTypeAttr - Process the __attribute__((objc_gc)) type
3990 /// attribute on the specified type. Returns true to indicate that
3991 /// the attribute was handled, false to indicate that the type does
3992 /// not permit the attribute.
3993 static bool handleObjCGCTypeAttr(TypeProcessingState &state,
3994 AttributeList &attr,
3996 Sema &S = state.getSema();
3998 // Delay if this isn't some kind of pointer.
3999 if (!type->isPointerType() &&
4000 !type->isObjCObjectPointerType() &&
4001 !type->isBlockPointerType())
4004 if (type.getObjCGCAttr() != Qualifiers::GCNone) {
4005 S.Diag(attr.getLoc(), diag::err_attribute_multiple_objc_gc);
4010 // Check the attribute arguments.
4011 if (!attr.getParameterName()) {
4012 S.Diag(attr.getLoc(), diag::err_attribute_argument_n_not_string)
4017 Qualifiers::GC GCAttr;
4018 if (attr.getNumArgs() != 0) {
4019 S.Diag(attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1;
4023 if (attr.getParameterName()->isStr("weak"))
4024 GCAttr = Qualifiers::Weak;
4025 else if (attr.getParameterName()->isStr("strong"))
4026 GCAttr = Qualifiers::Strong;
4028 S.Diag(attr.getLoc(), diag::warn_attribute_type_not_supported)
4029 << "objc_gc" << attr.getParameterName();
4034 QualType origType = type;
4035 type = S.Context.getObjCGCQualType(origType, GCAttr);
4037 // Make an attributed type to preserve the source information.
4038 if (attr.getLoc().isValid())
4039 type = S.Context.getAttributedType(AttributedType::attr_objc_gc,
4046 /// A helper class to unwrap a type down to a function for the
4047 /// purposes of applying attributes there.
4050 /// FunctionTypeUnwrapper unwrapped(SemaRef, T);
4051 /// if (unwrapped.isFunctionType()) {
4052 /// const FunctionType *fn = unwrapped.get();
4053 /// // change fn somehow
4054 /// T = unwrapped.wrap(fn);
4056 struct FunctionTypeUnwrapper {
4067 const FunctionType *Fn;
4068 SmallVector<unsigned char /*WrapKind*/, 8> Stack;
4070 FunctionTypeUnwrapper(Sema &S, QualType T) : Original(T) {
4072 const Type *Ty = T.getTypePtr();
4073 if (isa<FunctionType>(Ty)) {
4074 Fn = cast<FunctionType>(Ty);
4076 } else if (isa<ParenType>(Ty)) {
4077 T = cast<ParenType>(Ty)->getInnerType();
4078 Stack.push_back(Parens);
4079 } else if (isa<PointerType>(Ty)) {
4080 T = cast<PointerType>(Ty)->getPointeeType();
4081 Stack.push_back(Pointer);
4082 } else if (isa<BlockPointerType>(Ty)) {
4083 T = cast<BlockPointerType>(Ty)->getPointeeType();
4084 Stack.push_back(BlockPointer);
4085 } else if (isa<MemberPointerType>(Ty)) {
4086 T = cast<MemberPointerType>(Ty)->getPointeeType();
4087 Stack.push_back(MemberPointer);
4088 } else if (isa<ReferenceType>(Ty)) {
4089 T = cast<ReferenceType>(Ty)->getPointeeType();
4090 Stack.push_back(Reference);
4092 const Type *DTy = Ty->getUnqualifiedDesugaredType();
4098 T = QualType(DTy, 0);
4099 Stack.push_back(Desugar);
4104 bool isFunctionType() const { return (Fn != 0); }
4105 const FunctionType *get() const { return Fn; }
4107 QualType wrap(Sema &S, const FunctionType *New) {
4108 // If T wasn't modified from the unwrapped type, do nothing.
4109 if (New == get()) return Original;
4112 return wrap(S.Context, Original, 0);
4116 QualType wrap(ASTContext &C, QualType Old, unsigned I) {
4117 if (I == Stack.size())
4118 return C.getQualifiedType(Fn, Old.getQualifiers());
4120 // Build up the inner type, applying the qualifiers from the old
4121 // type to the new type.
4122 SplitQualType SplitOld = Old.split();
4124 // As a special case, tail-recurse if there are no qualifiers.
4125 if (SplitOld.Quals.empty())
4126 return wrap(C, SplitOld.Ty, I);
4127 return C.getQualifiedType(wrap(C, SplitOld.Ty, I), SplitOld.Quals);
4130 QualType wrap(ASTContext &C, const Type *Old, unsigned I) {
4131 if (I == Stack.size()) return QualType(Fn, 0);
4133 switch (static_cast<WrapKind>(Stack[I++])) {
4135 // This is the point at which we potentially lose source
4137 return wrap(C, Old->getUnqualifiedDesugaredType(), I);
4140 QualType New = wrap(C, cast<ParenType>(Old)->getInnerType(), I);
4141 return C.getParenType(New);
4145 QualType New = wrap(C, cast<PointerType>(Old)->getPointeeType(), I);
4146 return C.getPointerType(New);
4149 case BlockPointer: {
4150 QualType New = wrap(C, cast<BlockPointerType>(Old)->getPointeeType(),I);
4151 return C.getBlockPointerType(New);
4154 case MemberPointer: {
4155 const MemberPointerType *OldMPT = cast<MemberPointerType>(Old);
4156 QualType New = wrap(C, OldMPT->getPointeeType(), I);
4157 return C.getMemberPointerType(New, OldMPT->getClass());
4161 const ReferenceType *OldRef = cast<ReferenceType>(Old);
4162 QualType New = wrap(C, OldRef->getPointeeType(), I);
4163 if (isa<LValueReferenceType>(OldRef))
4164 return C.getLValueReferenceType(New, OldRef->isSpelledAsLValue());
4166 return C.getRValueReferenceType(New);
4170 llvm_unreachable("unknown wrapping kind");
4175 /// Process an individual function attribute. Returns true to
4176 /// indicate that the attribute was handled, false if it wasn't.
4177 static bool handleFunctionTypeAttr(TypeProcessingState &state,
4178 AttributeList &attr,
4180 Sema &S = state.getSema();
4182 FunctionTypeUnwrapper unwrapped(S, type);
4184 if (attr.getKind() == AttributeList::AT_NoReturn) {
4185 if (S.CheckNoReturnAttr(attr))
4188 // Delay if this is not a function type.
4189 if (!unwrapped.isFunctionType())
4192 // Otherwise we can process right away.
4193 FunctionType::ExtInfo EI = unwrapped.get()->getExtInfo().withNoReturn(true);
4194 type = unwrapped.wrap(S, S.Context.adjustFunctionType(unwrapped.get(), EI));
4198 // ns_returns_retained is not always a type attribute, but if we got
4199 // here, we're treating it as one right now.
4200 if (attr.getKind() == AttributeList::AT_NSReturnsRetained) {
4201 assert(S.getLangOpts().ObjCAutoRefCount &&
4202 "ns_returns_retained treated as type attribute in non-ARC");
4203 if (attr.getNumArgs()) return true;
4205 // Delay if this is not a function type.
4206 if (!unwrapped.isFunctionType())
4209 FunctionType::ExtInfo EI
4210 = unwrapped.get()->getExtInfo().withProducesResult(true);
4211 type = unwrapped.wrap(S, S.Context.adjustFunctionType(unwrapped.get(), EI));
4215 if (attr.getKind() == AttributeList::AT_Regparm) {
4217 if (S.CheckRegparmAttr(attr, value))
4220 // Delay if this is not a function type.
4221 if (!unwrapped.isFunctionType())
4224 // Diagnose regparm with fastcall.
4225 const FunctionType *fn = unwrapped.get();
4226 CallingConv CC = fn->getCallConv();
4227 if (CC == CC_X86FastCall) {
4228 S.Diag(attr.getLoc(), diag::err_attributes_are_not_compatible)
4229 << FunctionType::getNameForCallConv(CC)
4235 FunctionType::ExtInfo EI =
4236 unwrapped.get()->getExtInfo().withRegParm(value);
4237 type = unwrapped.wrap(S, S.Context.adjustFunctionType(unwrapped.get(), EI));
4241 // Delay if the type didn't work out to a function.
4242 if (!unwrapped.isFunctionType()) return false;
4244 // Otherwise, a calling convention.
4246 if (S.CheckCallingConvAttr(attr, CC))
4249 const FunctionType *fn = unwrapped.get();
4250 CallingConv CCOld = fn->getCallConv();
4251 if (S.Context.getCanonicalCallConv(CC) ==
4252 S.Context.getCanonicalCallConv(CCOld)) {
4253 FunctionType::ExtInfo EI= unwrapped.get()->getExtInfo().withCallingConv(CC);
4254 type = unwrapped.wrap(S, S.Context.adjustFunctionType(unwrapped.get(), EI));
4258 if (CCOld != (S.LangOpts.MRTD ? CC_X86StdCall : CC_Default)) {
4259 // Should we diagnose reapplications of the same convention?
4260 S.Diag(attr.getLoc(), diag::err_attributes_are_not_compatible)
4261 << FunctionType::getNameForCallConv(CC)
4262 << FunctionType::getNameForCallConv(CCOld);
4267 // Diagnose the use of X86 fastcall on varargs or unprototyped functions.
4268 if (CC == CC_X86FastCall) {
4269 if (isa<FunctionNoProtoType>(fn)) {
4270 S.Diag(attr.getLoc(), diag::err_cconv_knr)
4271 << FunctionType::getNameForCallConv(CC);
4276 const FunctionProtoType *FnP = cast<FunctionProtoType>(fn);
4277 if (FnP->isVariadic()) {
4278 S.Diag(attr.getLoc(), diag::err_cconv_varargs)
4279 << FunctionType::getNameForCallConv(CC);
4284 // Also diagnose fastcall with regparm.
4285 if (fn->getHasRegParm()) {
4286 S.Diag(attr.getLoc(), diag::err_attributes_are_not_compatible)
4288 << FunctionType::getNameForCallConv(CC);
4294 FunctionType::ExtInfo EI = unwrapped.get()->getExtInfo().withCallingConv(CC);
4295 type = unwrapped.wrap(S, S.Context.adjustFunctionType(unwrapped.get(), EI));
4299 /// Handle OpenCL image access qualifiers: read_only, write_only, read_write
4300 static void HandleOpenCLImageAccessAttribute(QualType& CurType,
4301 const AttributeList &Attr,
4303 // Check the attribute arguments.
4304 if (Attr.getNumArgs() != 1) {
4305 S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1;
4309 Expr *sizeExpr = static_cast<Expr *>(Attr.getArg(0));
4310 llvm::APSInt arg(32);
4311 if (sizeExpr->isTypeDependent() || sizeExpr->isValueDependent() ||
4312 !sizeExpr->isIntegerConstantExpr(arg, S.Context)) {
4313 S.Diag(Attr.getLoc(), diag::err_attribute_argument_not_int)
4314 << "opencl_image_access" << sizeExpr->getSourceRange();
4318 unsigned iarg = static_cast<unsigned>(arg.getZExtValue());
4320 case CLIA_read_only:
4321 case CLIA_write_only:
4322 case CLIA_read_write:
4323 // Implemented in a separate patch
4326 // Implemented in a separate patch
4327 S.Diag(Attr.getLoc(), diag::err_attribute_invalid_size)
4328 << sizeExpr->getSourceRange();
4334 /// HandleVectorSizeAttribute - this attribute is only applicable to integral
4335 /// and float scalars, although arrays, pointers, and function return values are
4336 /// allowed in conjunction with this construct. Aggregates with this attribute
4337 /// are invalid, even if they are of the same size as a corresponding scalar.
4338 /// The raw attribute should contain precisely 1 argument, the vector size for
4339 /// the variable, measured in bytes. If curType and rawAttr are well formed,
4340 /// this routine will return a new vector type.
4341 static void HandleVectorSizeAttr(QualType& CurType, const AttributeList &Attr,
4343 // Check the attribute arguments.
4344 if (Attr.getNumArgs() != 1) {
4345 S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1;
4349 Expr *sizeExpr = static_cast<Expr *>(Attr.getArg(0));
4350 llvm::APSInt vecSize(32);
4351 if (sizeExpr->isTypeDependent() || sizeExpr->isValueDependent() ||
4352 !sizeExpr->isIntegerConstantExpr(vecSize, S.Context)) {
4353 S.Diag(Attr.getLoc(), diag::err_attribute_argument_not_int)
4354 << "vector_size" << sizeExpr->getSourceRange();
4358 // the base type must be integer or float, and can't already be a vector.
4359 if (!CurType->isIntegerType() && !CurType->isRealFloatingType()) {
4360 S.Diag(Attr.getLoc(), diag::err_attribute_invalid_vector_type) << CurType;
4364 unsigned typeSize = static_cast<unsigned>(S.Context.getTypeSize(CurType));
4365 // vecSize is specified in bytes - convert to bits.
4366 unsigned vectorSize = static_cast<unsigned>(vecSize.getZExtValue() * 8);
4368 // the vector size needs to be an integral multiple of the type size.
4369 if (vectorSize % typeSize) {
4370 S.Diag(Attr.getLoc(), diag::err_attribute_invalid_size)
4371 << sizeExpr->getSourceRange();
4375 if (vectorSize == 0) {
4376 S.Diag(Attr.getLoc(), diag::err_attribute_zero_size)
4377 << sizeExpr->getSourceRange();
4382 // Success! Instantiate the vector type, the number of elements is > 0, and
4383 // not required to be a power of 2, unlike GCC.
4384 CurType = S.Context.getVectorType(CurType, vectorSize/typeSize,
4385 VectorType::GenericVector);
4388 /// \brief Process the OpenCL-like ext_vector_type attribute when it occurs on
4390 static void HandleExtVectorTypeAttr(QualType &CurType,
4391 const AttributeList &Attr,
4395 // Special case where the argument is a template id.
4396 if (Attr.getParameterName()) {
4398 SourceLocation TemplateKWLoc;
4400 id.setIdentifier(Attr.getParameterName(), Attr.getLoc());
4402 ExprResult Size = S.ActOnIdExpression(S.getCurScope(), SS, TemplateKWLoc,
4404 if (Size.isInvalid())
4407 sizeExpr = Size.get();
4409 // check the attribute arguments.
4410 if (Attr.getNumArgs() != 1) {
4411 S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1;
4414 sizeExpr = Attr.getArg(0);
4417 // Create the vector type.
4418 QualType T = S.BuildExtVectorType(CurType, sizeExpr, Attr.getLoc());
4423 /// HandleNeonVectorTypeAttr - The "neon_vector_type" and
4424 /// "neon_polyvector_type" attributes are used to create vector types that
4425 /// are mangled according to ARM's ABI. Otherwise, these types are identical
4426 /// to those created with the "vector_size" attribute. Unlike "vector_size"
4427 /// the argument to these Neon attributes is the number of vector elements,
4428 /// not the vector size in bytes. The vector width and element type must
4429 /// match one of the standard Neon vector types.
4430 static void HandleNeonVectorTypeAttr(QualType& CurType,
4431 const AttributeList &Attr, Sema &S,
4432 VectorType::VectorKind VecKind,
4433 const char *AttrName) {
4434 // Check the attribute arguments.
4435 if (Attr.getNumArgs() != 1) {
4436 S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1;
4440 // The number of elements must be an ICE.
4441 Expr *numEltsExpr = static_cast<Expr *>(Attr.getArg(0));
4442 llvm::APSInt numEltsInt(32);
4443 if (numEltsExpr->isTypeDependent() || numEltsExpr->isValueDependent() ||
4444 !numEltsExpr->isIntegerConstantExpr(numEltsInt, S.Context)) {
4445 S.Diag(Attr.getLoc(), diag::err_attribute_argument_not_int)
4446 << AttrName << numEltsExpr->getSourceRange();
4450 // Only certain element types are supported for Neon vectors.
4451 const BuiltinType* BTy = CurType->getAs<BuiltinType>();
4453 (VecKind == VectorType::NeonPolyVector &&
4454 BTy->getKind() != BuiltinType::SChar &&
4455 BTy->getKind() != BuiltinType::Short) ||
4456 (BTy->getKind() != BuiltinType::SChar &&
4457 BTy->getKind() != BuiltinType::UChar &&
4458 BTy->getKind() != BuiltinType::Short &&
4459 BTy->getKind() != BuiltinType::UShort &&
4460 BTy->getKind() != BuiltinType::Int &&
4461 BTy->getKind() != BuiltinType::UInt &&
4462 BTy->getKind() != BuiltinType::LongLong &&
4463 BTy->getKind() != BuiltinType::ULongLong &&
4464 BTy->getKind() != BuiltinType::Float)) {
4465 S.Diag(Attr.getLoc(), diag::err_attribute_invalid_vector_type) <<CurType;
4469 // The total size of the vector must be 64 or 128 bits.
4470 unsigned typeSize = static_cast<unsigned>(S.Context.getTypeSize(CurType));
4471 unsigned numElts = static_cast<unsigned>(numEltsInt.getZExtValue());
4472 unsigned vecSize = typeSize * numElts;
4473 if (vecSize != 64 && vecSize != 128) {
4474 S.Diag(Attr.getLoc(), diag::err_attribute_bad_neon_vector_size) << CurType;
4479 CurType = S.Context.getVectorType(CurType, numElts, VecKind);
4482 static void processTypeAttrs(TypeProcessingState &state, QualType &type,
4483 TypeAttrLocation TAL, AttributeList *attrs) {
4484 // Scan through and apply attributes to this type where it makes sense. Some
4485 // attributes (such as __address_space__, __vector_size__, etc) apply to the
4486 // type, but others can be present in the type specifiers even though they
4487 // apply to the decl. Here we apply type attributes and ignore the rest.
4489 AttributeList *next;
4491 AttributeList &attr = *attrs;
4492 next = attr.getNext();
4494 // Skip attributes that were marked to be invalid.
4495 if (attr.isInvalid())
4498 if (attr.isCXX11Attribute()) {
4499 // [[gnu::...]] attributes are treated as declaration attributes, so may
4500 // not appertain to a DeclaratorChunk, even if we handle them as type
4502 if (attr.getScopeName() && attr.getScopeName()->isStr("gnu")) {
4503 if (TAL == TAL_DeclChunk) {
4504 state.getSema().Diag(attr.getLoc(),
4505 diag::warn_cxx11_gnu_attribute_on_type)
4509 } else if (TAL != TAL_DeclChunk) {
4510 // Otherwise, only consider type processing for a C++11 attribute if
4511 // it's actually been applied to a type.
4516 // If this is an attribute we can handle, do so now,
4517 // otherwise, add it to the FnAttrs list for rechaining.
4518 switch (attr.getKind()) {
4520 // A C++11 attribute on a declarator chunk must appertain to a type.
4521 if (attr.isCXX11Attribute() && TAL == TAL_DeclChunk) {
4522 state.getSema().Diag(attr.getLoc(), diag::err_attribute_not_type_attr)
4524 attr.setUsedAsTypeAttr();
4528 case AttributeList::UnknownAttribute:
4529 if (attr.isCXX11Attribute() && TAL == TAL_DeclChunk)
4530 state.getSema().Diag(attr.getLoc(),
4531 diag::warn_unknown_attribute_ignored)
4535 case AttributeList::IgnoredAttribute:
4538 case AttributeList::AT_MayAlias:
4539 // FIXME: This attribute needs to actually be handled, but if we ignore
4540 // it it breaks large amounts of Linux software.
4541 attr.setUsedAsTypeAttr();
4543 case AttributeList::AT_AddressSpace:
4544 HandleAddressSpaceTypeAttribute(type, attr, state.getSema());
4545 attr.setUsedAsTypeAttr();
4547 OBJC_POINTER_TYPE_ATTRS_CASELIST:
4548 if (!handleObjCPointerTypeAttr(state, attr, type))
4549 distributeObjCPointerTypeAttr(state, attr, type);
4550 attr.setUsedAsTypeAttr();
4552 case AttributeList::AT_VectorSize:
4553 HandleVectorSizeAttr(type, attr, state.getSema());
4554 attr.setUsedAsTypeAttr();
4556 case AttributeList::AT_ExtVectorType:
4557 HandleExtVectorTypeAttr(type, attr, state.getSema());
4558 attr.setUsedAsTypeAttr();
4560 case AttributeList::AT_NeonVectorType:
4561 HandleNeonVectorTypeAttr(type, attr, state.getSema(),
4562 VectorType::NeonVector, "neon_vector_type");
4563 attr.setUsedAsTypeAttr();
4565 case AttributeList::AT_NeonPolyVectorType:
4566 HandleNeonVectorTypeAttr(type, attr, state.getSema(),
4567 VectorType::NeonPolyVector,
4568 "neon_polyvector_type");
4569 attr.setUsedAsTypeAttr();
4571 case AttributeList::AT_OpenCLImageAccess:
4572 HandleOpenCLImageAccessAttribute(type, attr, state.getSema());
4573 attr.setUsedAsTypeAttr();
4576 case AttributeList::AT_Win64:
4577 case AttributeList::AT_Ptr32:
4578 case AttributeList::AT_Ptr64:
4579 // FIXME: Don't ignore these. We have partial handling for them as
4580 // declaration attributes in SemaDeclAttr.cpp; that should be moved here.
4581 attr.setUsedAsTypeAttr();
4584 case AttributeList::AT_NSReturnsRetained:
4585 if (!state.getSema().getLangOpts().ObjCAutoRefCount)
4587 // fallthrough into the function attrs
4589 FUNCTION_TYPE_ATTRS_CASELIST:
4590 attr.setUsedAsTypeAttr();
4592 // Never process function type attributes as part of the
4593 // declaration-specifiers.
4594 if (TAL == TAL_DeclSpec)
4595 distributeFunctionTypeAttrFromDeclSpec(state, attr, type);
4597 // Otherwise, handle the possible delays.
4598 else if (!handleFunctionTypeAttr(state, attr, type))
4599 distributeFunctionTypeAttr(state, attr, type);
4602 } while ((attrs = next));
4605 /// \brief Ensure that the type of the given expression is complete.
4607 /// This routine checks whether the expression \p E has a complete type. If the
4608 /// expression refers to an instantiable construct, that instantiation is
4609 /// performed as needed to complete its type. Furthermore
4610 /// Sema::RequireCompleteType is called for the expression's type (or in the
4611 /// case of a reference type, the referred-to type).
4613 /// \param E The expression whose type is required to be complete.
4614 /// \param Diagnoser The object that will emit a diagnostic if the type is
4617 /// \returns \c true if the type of \p E is incomplete and diagnosed, \c false
4619 bool Sema::RequireCompleteExprType(Expr *E, TypeDiagnoser &Diagnoser){
4620 QualType T = E->getType();
4622 // Fast path the case where the type is already complete.
4623 if (!T->isIncompleteType())
4626 // Incomplete array types may be completed by the initializer attached to
4627 // their definitions. For static data members of class templates we need to
4628 // instantiate the definition to get this initializer and complete the type.
4629 if (T->isIncompleteArrayType()) {
4630 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E->IgnoreParens())) {
4631 if (VarDecl *Var = dyn_cast<VarDecl>(DRE->getDecl())) {
4632 if (Var->isStaticDataMember() &&
4633 Var->getInstantiatedFromStaticDataMember()) {
4635 MemberSpecializationInfo *MSInfo = Var->getMemberSpecializationInfo();
4636 assert(MSInfo && "Missing member specialization information?");
4637 if (MSInfo->getTemplateSpecializationKind()
4638 != TSK_ExplicitSpecialization) {
4639 // If we don't already have a point of instantiation, this is it.
4640 if (MSInfo->getPointOfInstantiation().isInvalid()) {
4641 MSInfo->setPointOfInstantiation(E->getLocStart());
4643 // This is a modification of an existing AST node. Notify
4645 if (ASTMutationListener *L = getASTMutationListener())
4646 L->StaticDataMemberInstantiated(Var);
4649 InstantiateStaticDataMemberDefinition(E->getExprLoc(), Var);
4651 // Update the type to the newly instantiated definition's type both
4652 // here and within the expression.
4653 if (VarDecl *Def = Var->getDefinition()) {
4661 // We still go on to try to complete the type independently, as it
4662 // may also require instantiations or diagnostics if it remains
4669 // FIXME: Are there other cases which require instantiating something other
4670 // than the type to complete the type of an expression?
4672 // Look through reference types and complete the referred type.
4673 if (const ReferenceType *Ref = T->getAs<ReferenceType>())
4674 T = Ref->getPointeeType();
4676 return RequireCompleteType(E->getExprLoc(), T, Diagnoser);
4680 struct TypeDiagnoserDiag : Sema::TypeDiagnoser {
4683 TypeDiagnoserDiag(unsigned DiagID)
4684 : Sema::TypeDiagnoser(DiagID == 0), DiagID(DiagID) {}
4686 virtual void diagnose(Sema &S, SourceLocation Loc, QualType T) {
4687 if (Suppressed) return;
4688 S.Diag(Loc, DiagID) << T;
4693 bool Sema::RequireCompleteExprType(Expr *E, unsigned DiagID) {
4694 TypeDiagnoserDiag Diagnoser(DiagID);
4695 return RequireCompleteExprType(E, Diagnoser);
4698 /// @brief Ensure that the type T is a complete type.
4700 /// This routine checks whether the type @p T is complete in any
4701 /// context where a complete type is required. If @p T is a complete
4702 /// type, returns false. If @p T is a class template specialization,
4703 /// this routine then attempts to perform class template
4704 /// instantiation. If instantiation fails, or if @p T is incomplete
4705 /// and cannot be completed, issues the diagnostic @p diag (giving it
4706 /// the type @p T) and returns true.
4708 /// @param Loc The location in the source that the incomplete type
4709 /// diagnostic should refer to.
4711 /// @param T The type that this routine is examining for completeness.
4713 /// @returns @c true if @p T is incomplete and a diagnostic was emitted,
4714 /// @c false otherwise.
4715 bool Sema::RequireCompleteType(SourceLocation Loc, QualType T,
4716 TypeDiagnoser &Diagnoser) {
4717 // FIXME: Add this assertion to make sure we always get instantiation points.
4718 // assert(!Loc.isInvalid() && "Invalid location in RequireCompleteType");
4719 // FIXME: Add this assertion to help us flush out problems with
4720 // checking for dependent types and type-dependent expressions.
4722 // assert(!T->isDependentType() &&
4723 // "Can't ask whether a dependent type is complete");
4725 // If we have a complete type, we're done.
4727 if (!T->isIncompleteType(&Def)) {
4728 // If we know about the definition but it is not visible, complain.
4729 if (!Diagnoser.Suppressed && Def && !LookupResult::isVisible(Def)) {
4730 // Suppress this error outside of a SFINAE context if we've already
4731 // emitted the error once for this type. There's no usefulness in
4732 // repeating the diagnostic.
4733 // FIXME: Add a Fix-It that imports the corresponding module or includes
4735 Module *Owner = Def->getOwningModule();
4736 Diag(Loc, diag::err_module_private_definition)
4737 << T << Owner->getFullModuleName();
4738 Diag(Def->getLocation(), diag::note_previous_definition);
4740 if (!isSFINAEContext()) {
4741 // Recover by implicitly importing this module.
4742 createImplicitModuleImport(Loc, Owner);
4749 const TagType *Tag = T->getAs<TagType>();
4750 const ObjCInterfaceType *IFace = 0;
4753 // Avoid diagnosing invalid decls as incomplete.
4754 if (Tag->getDecl()->isInvalidDecl())
4757 // Give the external AST source a chance to complete the type.
4758 if (Tag->getDecl()->hasExternalLexicalStorage()) {
4759 Context.getExternalSource()->CompleteType(Tag->getDecl());
4760 if (!Tag->isIncompleteType())
4764 else if ((IFace = T->getAs<ObjCInterfaceType>())) {
4765 // Avoid diagnosing invalid decls as incomplete.
4766 if (IFace->getDecl()->isInvalidDecl())
4769 // Give the external AST source a chance to complete the type.
4770 if (IFace->getDecl()->hasExternalLexicalStorage()) {
4771 Context.getExternalSource()->CompleteType(IFace->getDecl());
4772 if (!IFace->isIncompleteType())
4777 // If we have a class template specialization or a class member of a
4778 // class template specialization, or an array with known size of such,
4779 // try to instantiate it.
4780 QualType MaybeTemplate = T;
4781 while (const ConstantArrayType *Array
4782 = Context.getAsConstantArrayType(MaybeTemplate))
4783 MaybeTemplate = Array->getElementType();
4784 if (const RecordType *Record = MaybeTemplate->getAs<RecordType>()) {
4785 if (ClassTemplateSpecializationDecl *ClassTemplateSpec
4786 = dyn_cast<ClassTemplateSpecializationDecl>(Record->getDecl())) {
4787 if (ClassTemplateSpec->getSpecializationKind() == TSK_Undeclared)
4788 return InstantiateClassTemplateSpecialization(Loc, ClassTemplateSpec,
4789 TSK_ImplicitInstantiation,
4790 /*Complain=*/!Diagnoser.Suppressed);
4791 } else if (CXXRecordDecl *Rec
4792 = dyn_cast<CXXRecordDecl>(Record->getDecl())) {
4793 CXXRecordDecl *Pattern = Rec->getInstantiatedFromMemberClass();
4794 if (!Rec->isBeingDefined() && Pattern) {
4795 MemberSpecializationInfo *MSI = Rec->getMemberSpecializationInfo();
4796 assert(MSI && "Missing member specialization information?");
4797 // This record was instantiated from a class within a template.
4798 if (MSI->getTemplateSpecializationKind() != TSK_ExplicitSpecialization)
4799 return InstantiateClass(Loc, Rec, Pattern,
4800 getTemplateInstantiationArgs(Rec),
4801 TSK_ImplicitInstantiation,
4802 /*Complain=*/!Diagnoser.Suppressed);
4807 if (Diagnoser.Suppressed)
4810 // We have an incomplete type. Produce a diagnostic.
4811 Diagnoser.diagnose(*this, Loc, T);
4813 // If the type was a forward declaration of a class/struct/union
4814 // type, produce a note.
4815 if (Tag && !Tag->getDecl()->isInvalidDecl())
4816 Diag(Tag->getDecl()->getLocation(),
4817 Tag->isBeingDefined() ? diag::note_type_being_defined
4818 : diag::note_forward_declaration)
4819 << QualType(Tag, 0);
4821 // If the Objective-C class was a forward declaration, produce a note.
4822 if (IFace && !IFace->getDecl()->isInvalidDecl())
4823 Diag(IFace->getDecl()->getLocation(), diag::note_forward_class);
4828 bool Sema::RequireCompleteType(SourceLocation Loc, QualType T,
4830 TypeDiagnoserDiag Diagnoser(DiagID);
4831 return RequireCompleteType(Loc, T, Diagnoser);
4834 /// \brief Get diagnostic %select index for tag kind for
4835 /// literal type diagnostic message.
4836 /// WARNING: Indexes apply to particular diagnostics only!
4838 /// \returns diagnostic %select index.
4839 static unsigned getLiteralDiagFromTagKind(TagTypeKind Tag) {
4841 case TTK_Struct: return 0;
4842 case TTK_Interface: return 1;
4843 case TTK_Class: return 2;
4844 default: llvm_unreachable("Invalid tag kind for literal type diagnostic!");
4848 /// @brief Ensure that the type T is a literal type.
4850 /// This routine checks whether the type @p T is a literal type. If @p T is an
4851 /// incomplete type, an attempt is made to complete it. If @p T is a literal
4852 /// type, or @p AllowIncompleteType is true and @p T is an incomplete type,
4853 /// returns false. Otherwise, this routine issues the diagnostic @p PD (giving
4854 /// it the type @p T), along with notes explaining why the type is not a
4855 /// literal type, and returns true.
4857 /// @param Loc The location in the source that the non-literal type
4858 /// diagnostic should refer to.
4860 /// @param T The type that this routine is examining for literalness.
4862 /// @param Diagnoser Emits a diagnostic if T is not a literal type.
4864 /// @returns @c true if @p T is not a literal type and a diagnostic was emitted,
4865 /// @c false otherwise.
4866 bool Sema::RequireLiteralType(SourceLocation Loc, QualType T,
4867 TypeDiagnoser &Diagnoser) {
4868 assert(!T->isDependentType() && "type should not be dependent");
4870 QualType ElemType = Context.getBaseElementType(T);
4871 RequireCompleteType(Loc, ElemType, 0);
4873 if (T->isLiteralType(Context))
4876 if (Diagnoser.Suppressed)
4879 Diagnoser.diagnose(*this, Loc, T);
4881 if (T->isVariableArrayType())
4884 const RecordType *RT = ElemType->getAs<RecordType>();
4888 const CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl());
4890 // A partially-defined class type can't be a literal type, because a literal
4891 // class type must have a trivial destructor (which can't be checked until
4892 // the class definition is complete).
4893 if (!RD->isCompleteDefinition()) {
4894 RequireCompleteType(Loc, ElemType, diag::note_non_literal_incomplete, T);
4898 // If the class has virtual base classes, then it's not an aggregate, and
4899 // cannot have any constexpr constructors or a trivial default constructor,
4900 // so is non-literal. This is better to diagnose than the resulting absence
4901 // of constexpr constructors.
4902 if (RD->getNumVBases()) {
4903 Diag(RD->getLocation(), diag::note_non_literal_virtual_base)
4904 << getLiteralDiagFromTagKind(RD->getTagKind()) << RD->getNumVBases();
4905 for (CXXRecordDecl::base_class_const_iterator I = RD->vbases_begin(),
4906 E = RD->vbases_end(); I != E; ++I)
4907 Diag(I->getLocStart(),
4908 diag::note_constexpr_virtual_base_here) << I->getSourceRange();
4909 } else if (!RD->isAggregate() && !RD->hasConstexprNonCopyMoveConstructor() &&
4910 !RD->hasTrivialDefaultConstructor()) {
4911 Diag(RD->getLocation(), diag::note_non_literal_no_constexpr_ctors) << RD;
4912 } else if (RD->hasNonLiteralTypeFieldsOrBases()) {
4913 for (CXXRecordDecl::base_class_const_iterator I = RD->bases_begin(),
4914 E = RD->bases_end(); I != E; ++I) {
4915 if (!I->getType()->isLiteralType(Context)) {
4916 Diag(I->getLocStart(),
4917 diag::note_non_literal_base_class)
4918 << RD << I->getType() << I->getSourceRange();
4922 for (CXXRecordDecl::field_iterator I = RD->field_begin(),
4923 E = RD->field_end(); I != E; ++I) {
4924 if (!I->getType()->isLiteralType(Context) ||
4925 I->getType().isVolatileQualified()) {
4926 Diag(I->getLocation(), diag::note_non_literal_field)
4927 << RD << *I << I->getType()
4928 << I->getType().isVolatileQualified();
4932 } else if (!RD->hasTrivialDestructor()) {
4933 // All fields and bases are of literal types, so have trivial destructors.
4934 // If this class's destructor is non-trivial it must be user-declared.
4935 CXXDestructorDecl *Dtor = RD->getDestructor();
4936 assert(Dtor && "class has literal fields and bases but no dtor?");
4940 Diag(Dtor->getLocation(), Dtor->isUserProvided() ?
4941 diag::note_non_literal_user_provided_dtor :
4942 diag::note_non_literal_nontrivial_dtor) << RD;
4943 if (!Dtor->isUserProvided())
4944 SpecialMemberIsTrivial(Dtor, CXXDestructor, /*Diagnose*/true);
4950 bool Sema::RequireLiteralType(SourceLocation Loc, QualType T, unsigned DiagID) {
4951 TypeDiagnoserDiag Diagnoser(DiagID);
4952 return RequireLiteralType(Loc, T, Diagnoser);
4955 /// \brief Retrieve a version of the type 'T' that is elaborated by Keyword
4956 /// and qualified by the nested-name-specifier contained in SS.
4957 QualType Sema::getElaboratedType(ElaboratedTypeKeyword Keyword,
4958 const CXXScopeSpec &SS, QualType T) {
4961 NestedNameSpecifier *NNS;
4963 NNS = static_cast<NestedNameSpecifier *>(SS.getScopeRep());
4965 if (Keyword == ETK_None)
4969 return Context.getElaboratedType(Keyword, NNS, T);
4972 QualType Sema::BuildTypeofExprType(Expr *E, SourceLocation Loc) {
4973 ExprResult ER = CheckPlaceholderExpr(E);
4974 if (ER.isInvalid()) return QualType();
4977 if (!E->isTypeDependent()) {
4978 QualType T = E->getType();
4979 if (const TagType *TT = T->getAs<TagType>())
4980 DiagnoseUseOfDecl(TT->getDecl(), E->getExprLoc());
4982 return Context.getTypeOfExprType(E);
4985 /// getDecltypeForExpr - Given an expr, will return the decltype for
4986 /// that expression, according to the rules in C++11
4987 /// [dcl.type.simple]p4 and C++11 [expr.lambda.prim]p18.
4988 static QualType getDecltypeForExpr(Sema &S, Expr *E) {
4989 if (E->isTypeDependent())
4990 return S.Context.DependentTy;
4992 // C++11 [dcl.type.simple]p4:
4993 // The type denoted by decltype(e) is defined as follows:
4995 // - if e is an unparenthesized id-expression or an unparenthesized class
4996 // member access (5.2.5), decltype(e) is the type of the entity named
4997 // by e. If there is no such entity, or if e names a set of overloaded
4998 // functions, the program is ill-formed;
5000 // We apply the same rules for Objective-C ivar and property references.
5001 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) {
5002 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl()))
5003 return VD->getType();
5004 } else if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) {
5005 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl()))
5006 return FD->getType();
5007 } else if (const ObjCIvarRefExpr *IR = dyn_cast<ObjCIvarRefExpr>(E)) {
5008 return IR->getDecl()->getType();
5009 } else if (const ObjCPropertyRefExpr *PR = dyn_cast<ObjCPropertyRefExpr>(E)) {
5010 if (PR->isExplicitProperty())
5011 return PR->getExplicitProperty()->getType();
5014 // C++11 [expr.lambda.prim]p18:
5015 // Every occurrence of decltype((x)) where x is a possibly
5016 // parenthesized id-expression that names an entity of automatic
5017 // storage duration is treated as if x were transformed into an
5018 // access to a corresponding data member of the closure type that
5019 // would have been declared if x were an odr-use of the denoted
5021 using namespace sema;
5022 if (S.getCurLambda()) {
5023 if (isa<ParenExpr>(E)) {
5024 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E->IgnoreParens())) {
5025 if (VarDecl *Var = dyn_cast<VarDecl>(DRE->getDecl())) {
5026 QualType T = S.getCapturedDeclRefType(Var, DRE->getLocation());
5028 return S.Context.getLValueReferenceType(T);
5035 // C++11 [dcl.type.simple]p4:
5037 QualType T = E->getType();
5038 switch (E->getValueKind()) {
5039 // - otherwise, if e is an xvalue, decltype(e) is T&&, where T is the
5041 case VK_XValue: T = S.Context.getRValueReferenceType(T); break;
5042 // - otherwise, if e is an lvalue, decltype(e) is T&, where T is the
5044 case VK_LValue: T = S.Context.getLValueReferenceType(T); break;
5045 // - otherwise, decltype(e) is the type of e.
5046 case VK_RValue: break;
5052 QualType Sema::BuildDecltypeType(Expr *E, SourceLocation Loc) {
5053 ExprResult ER = CheckPlaceholderExpr(E);
5054 if (ER.isInvalid()) return QualType();
5057 return Context.getDecltypeType(E, getDecltypeForExpr(*this, E));
5060 QualType Sema::BuildUnaryTransformType(QualType BaseType,
5061 UnaryTransformType::UTTKind UKind,
5062 SourceLocation Loc) {
5064 case UnaryTransformType::EnumUnderlyingType:
5065 if (!BaseType->isDependentType() && !BaseType->isEnumeralType()) {
5066 Diag(Loc, diag::err_only_enums_have_underlying_types);
5069 QualType Underlying = BaseType;
5070 if (!BaseType->isDependentType()) {
5071 EnumDecl *ED = BaseType->getAs<EnumType>()->getDecl();
5072 assert(ED && "EnumType has no EnumDecl");
5073 DiagnoseUseOfDecl(ED, Loc);
5074 Underlying = ED->getIntegerType();
5076 assert(!Underlying.isNull());
5077 return Context.getUnaryTransformType(BaseType, Underlying,
5078 UnaryTransformType::EnumUnderlyingType);
5081 llvm_unreachable("unknown unary transform type");
5084 QualType Sema::BuildAtomicType(QualType T, SourceLocation Loc) {
5085 if (!T->isDependentType()) {
5086 // FIXME: It isn't entirely clear whether incomplete atomic types
5087 // are allowed or not; for simplicity, ban them for the moment.
5088 if (RequireCompleteType(Loc, T, diag::err_atomic_specifier_bad_type, 0))
5091 int DisallowedKind = -1;
5092 if (T->isArrayType())
5094 else if (T->isFunctionType())
5096 else if (T->isReferenceType())
5098 else if (T->isAtomicType())
5100 else if (T.hasQualifiers())
5102 else if (!T.isTriviallyCopyableType(Context))
5103 // Some other non-trivially-copyable type (probably a C++ class)
5106 if (DisallowedKind != -1) {
5107 Diag(Loc, diag::err_atomic_specifier_bad_type) << DisallowedKind << T;
5111 // FIXME: Do we need any handling for ARC here?
5114 // Build the pointer type.
5115 return Context.getAtomicType(T);