| //===--- SemaType.cpp - Semantic Analysis for Types -----------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file implements type-related semantic analysis. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "clang/Sema/ScopeInfo.h" |
| #include "clang/Sema/SemaInternal.h" |
| #include "clang/Sema/Template.h" |
| #include "clang/Basic/OpenCL.h" |
| #include "clang/AST/ASTContext.h" |
| #include "clang/AST/ASTMutationListener.h" |
| #include "clang/AST/CXXInheritance.h" |
| #include "clang/AST/DeclObjC.h" |
| #include "clang/AST/DeclTemplate.h" |
| #include "clang/AST/TypeLoc.h" |
| #include "clang/AST/TypeLocVisitor.h" |
| #include "clang/AST/Expr.h" |
| #include "clang/Basic/PartialDiagnostic.h" |
| #include "clang/Basic/TargetInfo.h" |
| #include "clang/Lex/Preprocessor.h" |
| #include "clang/Sema/DeclSpec.h" |
| #include "clang/Sema/DelayedDiagnostic.h" |
| #include "clang/Sema/Lookup.h" |
| #include "llvm/ADT/SmallPtrSet.h" |
| #include "llvm/Support/ErrorHandling.h" |
| using namespace clang; |
| |
| /// isOmittedBlockReturnType - Return true if this declarator is missing a |
| /// return type because this is a omitted return type on a block literal. |
| static bool isOmittedBlockReturnType(const Declarator &D) { |
| if (D.getContext() != Declarator::BlockLiteralContext || |
| D.getDeclSpec().hasTypeSpecifier()) |
| return false; |
| |
| if (D.getNumTypeObjects() == 0) |
| return true; // ^{ ... } |
| |
| if (D.getNumTypeObjects() == 1 && |
| D.getTypeObject(0).Kind == DeclaratorChunk::Function) |
| return true; // ^(int X, float Y) { ... } |
| |
| return false; |
| } |
| |
| /// diagnoseBadTypeAttribute - Diagnoses a type attribute which |
| /// doesn't apply to the given type. |
| static void diagnoseBadTypeAttribute(Sema &S, const AttributeList &attr, |
| QualType type) { |
| bool useExpansionLoc = false; |
| |
| unsigned diagID = 0; |
| switch (attr.getKind()) { |
| case AttributeList::AT_objc_gc: |
| diagID = diag::warn_pointer_attribute_wrong_type; |
| useExpansionLoc = true; |
| break; |
| |
| case AttributeList::AT_objc_ownership: |
| diagID = diag::warn_objc_object_attribute_wrong_type; |
| useExpansionLoc = true; |
| break; |
| |
| default: |
| // Assume everything else was a function attribute. |
| diagID = diag::warn_function_attribute_wrong_type; |
| break; |
| } |
| |
| SourceLocation loc = attr.getLoc(); |
| StringRef name = attr.getName()->getName(); |
| |
| // The GC attributes are usually written with macros; special-case them. |
| if (useExpansionLoc && loc.isMacroID() && attr.getParameterName()) { |
| if (attr.getParameterName()->isStr("strong")) { |
| if (S.findMacroSpelling(loc, "__strong")) name = "__strong"; |
| } else if (attr.getParameterName()->isStr("weak")) { |
| if (S.findMacroSpelling(loc, "__weak")) name = "__weak"; |
| } |
| } |
| |
| S.Diag(loc, diagID) << name << type; |
| } |
| |
| // objc_gc applies to Objective-C pointers or, otherwise, to the |
| // smallest available pointer type (i.e. 'void*' in 'void**'). |
| #define OBJC_POINTER_TYPE_ATTRS_CASELIST \ |
| case AttributeList::AT_objc_gc: \ |
| case AttributeList::AT_objc_ownership |
| |
| // Function type attributes. |
| #define FUNCTION_TYPE_ATTRS_CASELIST \ |
| case AttributeList::AT_noreturn: \ |
| case AttributeList::AT_cdecl: \ |
| case AttributeList::AT_fastcall: \ |
| case AttributeList::AT_stdcall: \ |
| case AttributeList::AT_thiscall: \ |
| case AttributeList::AT_pascal: \ |
| case AttributeList::AT_regparm: \ |
| case AttributeList::AT_pcs \ |
| |
| namespace { |
| /// An object which stores processing state for the entire |
| /// GetTypeForDeclarator process. |
| class TypeProcessingState { |
| Sema &sema; |
| |
| /// The declarator being processed. |
| Declarator &declarator; |
| |
| /// The index of the declarator chunk we're currently processing. |
| /// May be the total number of valid chunks, indicating the |
| /// DeclSpec. |
| unsigned chunkIndex; |
| |
| /// Whether there are non-trivial modifications to the decl spec. |
| bool trivial; |
| |
| /// Whether we saved the attributes in the decl spec. |
| bool hasSavedAttrs; |
| |
| /// The original set of attributes on the DeclSpec. |
| SmallVector<AttributeList*, 2> savedAttrs; |
| |
| /// A list of attributes to diagnose the uselessness of when the |
| /// processing is complete. |
| SmallVector<AttributeList*, 2> ignoredTypeAttrs; |
| |
| public: |
| TypeProcessingState(Sema &sema, Declarator &declarator) |
| : sema(sema), declarator(declarator), |
| chunkIndex(declarator.getNumTypeObjects()), |
| trivial(true), hasSavedAttrs(false) {} |
| |
| Sema &getSema() const { |
| return sema; |
| } |
| |
| Declarator &getDeclarator() const { |
| return declarator; |
| } |
| |
| unsigned getCurrentChunkIndex() const { |
| return chunkIndex; |
| } |
| |
| void setCurrentChunkIndex(unsigned idx) { |
| assert(idx <= declarator.getNumTypeObjects()); |
| chunkIndex = idx; |
| } |
| |
| AttributeList *&getCurrentAttrListRef() const { |
| assert(chunkIndex <= declarator.getNumTypeObjects()); |
| if (chunkIndex == declarator.getNumTypeObjects()) |
| return getMutableDeclSpec().getAttributes().getListRef(); |
| return declarator.getTypeObject(chunkIndex).getAttrListRef(); |
| } |
| |
| /// Save the current set of attributes on the DeclSpec. |
| void saveDeclSpecAttrs() { |
| // Don't try to save them multiple times. |
| if (hasSavedAttrs) return; |
| |
| DeclSpec &spec = getMutableDeclSpec(); |
| for (AttributeList *attr = spec.getAttributes().getList(); attr; |
| attr = attr->getNext()) |
| savedAttrs.push_back(attr); |
| trivial &= savedAttrs.empty(); |
| hasSavedAttrs = true; |
| } |
| |
| /// Record that we had nowhere to put the given type attribute. |
| /// We will diagnose such attributes later. |
| void addIgnoredTypeAttr(AttributeList &attr) { |
| ignoredTypeAttrs.push_back(&attr); |
| } |
| |
| /// Diagnose all the ignored type attributes, given that the |
| /// declarator worked out to the given type. |
| void diagnoseIgnoredTypeAttrs(QualType type) const { |
| for (SmallVectorImpl<AttributeList*>::const_iterator |
| i = ignoredTypeAttrs.begin(), e = ignoredTypeAttrs.end(); |
| i != e; ++i) |
| diagnoseBadTypeAttribute(getSema(), **i, type); |
| } |
| |
| ~TypeProcessingState() { |
| if (trivial) return; |
| |
| restoreDeclSpecAttrs(); |
| } |
| |
| private: |
| DeclSpec &getMutableDeclSpec() const { |
| return const_cast<DeclSpec&>(declarator.getDeclSpec()); |
| } |
| |
| void restoreDeclSpecAttrs() { |
| assert(hasSavedAttrs); |
| |
| if (savedAttrs.empty()) { |
| getMutableDeclSpec().getAttributes().set(0); |
| return; |
| } |
| |
| getMutableDeclSpec().getAttributes().set(savedAttrs[0]); |
| for (unsigned i = 0, e = savedAttrs.size() - 1; i != e; ++i) |
| savedAttrs[i]->setNext(savedAttrs[i+1]); |
| savedAttrs.back()->setNext(0); |
| } |
| }; |
| |
| /// Basically std::pair except that we really want to avoid an |
| /// implicit operator= for safety concerns. It's also a minor |
| /// link-time optimization for this to be a private type. |
| struct AttrAndList { |
| /// The attribute. |
| AttributeList &first; |
| |
| /// The head of the list the attribute is currently in. |
| AttributeList *&second; |
| |
| AttrAndList(AttributeList &attr, AttributeList *&head) |
| : first(attr), second(head) {} |
| }; |
| } |
| |
| namespace llvm { |
| template <> struct isPodLike<AttrAndList> { |
| static const bool value = true; |
| }; |
| } |
| |
| static void spliceAttrIntoList(AttributeList &attr, AttributeList *&head) { |
| attr.setNext(head); |
| head = &attr; |
| } |
| |
| static void spliceAttrOutOfList(AttributeList &attr, AttributeList *&head) { |
| if (head == &attr) { |
| head = attr.getNext(); |
| return; |
| } |
| |
| AttributeList *cur = head; |
| while (true) { |
| assert(cur && cur->getNext() && "ran out of attrs?"); |
| if (cur->getNext() == &attr) { |
| cur->setNext(attr.getNext()); |
| return; |
| } |
| cur = cur->getNext(); |
| } |
| } |
| |
| static void moveAttrFromListToList(AttributeList &attr, |
| AttributeList *&fromList, |
| AttributeList *&toList) { |
| spliceAttrOutOfList(attr, fromList); |
| spliceAttrIntoList(attr, toList); |
| } |
| |
| static void processTypeAttrs(TypeProcessingState &state, |
| QualType &type, bool isDeclSpec, |
| AttributeList *attrs); |
| |
| static bool handleFunctionTypeAttr(TypeProcessingState &state, |
| AttributeList &attr, |
| QualType &type); |
| |
| static bool handleObjCGCTypeAttr(TypeProcessingState &state, |
| AttributeList &attr, QualType &type); |
| |
| static bool handleObjCOwnershipTypeAttr(TypeProcessingState &state, |
| AttributeList &attr, QualType &type); |
| |
| static bool handleObjCPointerTypeAttr(TypeProcessingState &state, |
| AttributeList &attr, QualType &type) { |
| if (attr.getKind() == AttributeList::AT_objc_gc) |
| return handleObjCGCTypeAttr(state, attr, type); |
| assert(attr.getKind() == AttributeList::AT_objc_ownership); |
| return handleObjCOwnershipTypeAttr(state, attr, type); |
| } |
| |
| /// Given that an objc_gc attribute was written somewhere on a |
| /// declaration *other* than on the declarator itself (for which, use |
| /// distributeObjCPointerTypeAttrFromDeclarator), and given that it |
| /// didn't apply in whatever position it was written in, try to move |
| /// it to a more appropriate position. |
| static void distributeObjCPointerTypeAttr(TypeProcessingState &state, |
| AttributeList &attr, |
| QualType type) { |
| Declarator &declarator = state.getDeclarator(); |
| for (unsigned i = state.getCurrentChunkIndex(); i != 0; --i) { |
| DeclaratorChunk &chunk = declarator.getTypeObject(i-1); |
| switch (chunk.Kind) { |
| case DeclaratorChunk::Pointer: |
| case DeclaratorChunk::BlockPointer: |
| moveAttrFromListToList(attr, state.getCurrentAttrListRef(), |
| chunk.getAttrListRef()); |
| return; |
| |
| case DeclaratorChunk::Paren: |
| case DeclaratorChunk::Array: |
| continue; |
| |
| // Don't walk through these. |
| case DeclaratorChunk::Reference: |
| case DeclaratorChunk::Function: |
| case DeclaratorChunk::MemberPointer: |
| goto error; |
| } |
| } |
| error: |
| |
| diagnoseBadTypeAttribute(state.getSema(), attr, type); |
| } |
| |
| /// Distribute an objc_gc type attribute that was written on the |
| /// declarator. |
| static void |
| distributeObjCPointerTypeAttrFromDeclarator(TypeProcessingState &state, |
| AttributeList &attr, |
| QualType &declSpecType) { |
| Declarator &declarator = state.getDeclarator(); |
| |
| // objc_gc goes on the innermost pointer to something that's not a |
| // pointer. |
| unsigned innermost = -1U; |
| bool considerDeclSpec = true; |
| for (unsigned i = 0, e = declarator.getNumTypeObjects(); i != e; ++i) { |
| DeclaratorChunk &chunk = declarator.getTypeObject(i); |
| switch (chunk.Kind) { |
| case DeclaratorChunk::Pointer: |
| case DeclaratorChunk::BlockPointer: |
| innermost = i; |
| continue; |
| |
| case DeclaratorChunk::Reference: |
| case DeclaratorChunk::MemberPointer: |
| case DeclaratorChunk::Paren: |
| case DeclaratorChunk::Array: |
| continue; |
| |
| case DeclaratorChunk::Function: |
| considerDeclSpec = false; |
| goto done; |
| } |
| } |
| done: |
| |
| // That might actually be the decl spec if we weren't blocked by |
| // anything in the declarator. |
| if (considerDeclSpec) { |
| if (handleObjCPointerTypeAttr(state, attr, declSpecType)) { |
| // Splice the attribute into the decl spec. Prevents the |
| // attribute from being applied multiple times and gives |
| // the source-location-filler something to work with. |
| state.saveDeclSpecAttrs(); |
| moveAttrFromListToList(attr, declarator.getAttrListRef(), |
| declarator.getMutableDeclSpec().getAttributes().getListRef()); |
| return; |
| } |
| } |
| |
| // Otherwise, if we found an appropriate chunk, splice the attribute |
| // into it. |
| if (innermost != -1U) { |
| moveAttrFromListToList(attr, declarator.getAttrListRef(), |
| declarator.getTypeObject(innermost).getAttrListRef()); |
| return; |
| } |
| |
| // Otherwise, diagnose when we're done building the type. |
| spliceAttrOutOfList(attr, declarator.getAttrListRef()); |
| state.addIgnoredTypeAttr(attr); |
| } |
| |
| /// A function type attribute was written somewhere in a declaration |
| /// *other* than on the declarator itself or in the decl spec. Given |
| /// that it didn't apply in whatever position it was written in, try |
| /// to move it to a more appropriate position. |
| static void distributeFunctionTypeAttr(TypeProcessingState &state, |
| AttributeList &attr, |
| QualType type) { |
| Declarator &declarator = state.getDeclarator(); |
| |
| // Try to push the attribute from the return type of a function to |
| // the function itself. |
| for (unsigned i = state.getCurrentChunkIndex(); i != 0; --i) { |
| DeclaratorChunk &chunk = declarator.getTypeObject(i-1); |
| switch (chunk.Kind) { |
| case DeclaratorChunk::Function: |
| moveAttrFromListToList(attr, state.getCurrentAttrListRef(), |
| chunk.getAttrListRef()); |
| return; |
| |
| case DeclaratorChunk::Paren: |
| case DeclaratorChunk::Pointer: |
| case DeclaratorChunk::BlockPointer: |
| case DeclaratorChunk::Array: |
| case DeclaratorChunk::Reference: |
| case DeclaratorChunk::MemberPointer: |
| continue; |
| } |
| } |
| |
| diagnoseBadTypeAttribute(state.getSema(), attr, type); |
| } |
| |
| /// Try to distribute a function type attribute to the innermost |
| /// function chunk or type. Returns true if the attribute was |
| /// distributed, false if no location was found. |
| static bool |
| distributeFunctionTypeAttrToInnermost(TypeProcessingState &state, |
| AttributeList &attr, |
| AttributeList *&attrList, |
| QualType &declSpecType) { |
| Declarator &declarator = state.getDeclarator(); |
| |
| // Put it on the innermost function chunk, if there is one. |
| for (unsigned i = 0, e = declarator.getNumTypeObjects(); i != e; ++i) { |
| DeclaratorChunk &chunk = declarator.getTypeObject(i); |
| if (chunk.Kind != DeclaratorChunk::Function) continue; |
| |
| moveAttrFromListToList(attr, attrList, chunk.getAttrListRef()); |
| return true; |
| } |
| |
| if (handleFunctionTypeAttr(state, attr, declSpecType)) { |
| spliceAttrOutOfList(attr, attrList); |
| return true; |
| } |
| |
| return false; |
| } |
| |
| /// A function type attribute was written in the decl spec. Try to |
| /// apply it somewhere. |
| static void |
| distributeFunctionTypeAttrFromDeclSpec(TypeProcessingState &state, |
| AttributeList &attr, |
| QualType &declSpecType) { |
| state.saveDeclSpecAttrs(); |
| |
| // Try to distribute to the innermost. |
| if (distributeFunctionTypeAttrToInnermost(state, attr, |
| state.getCurrentAttrListRef(), |
| declSpecType)) |
| return; |
| |
| // If that failed, diagnose the bad attribute when the declarator is |
| // fully built. |
| state.addIgnoredTypeAttr(attr); |
| } |
| |
| /// A function type attribute was written on the declarator. Try to |
| /// apply it somewhere. |
| static void |
| distributeFunctionTypeAttrFromDeclarator(TypeProcessingState &state, |
| AttributeList &attr, |
| QualType &declSpecType) { |
| Declarator &declarator = state.getDeclarator(); |
| |
| // Try to distribute to the innermost. |
| if (distributeFunctionTypeAttrToInnermost(state, attr, |
| declarator.getAttrListRef(), |
| declSpecType)) |
| return; |
| |
| // If that failed, diagnose the bad attribute when the declarator is |
| // fully built. |
| spliceAttrOutOfList(attr, declarator.getAttrListRef()); |
| state.addIgnoredTypeAttr(attr); |
| } |
| |
| /// \brief Given that there are attributes written on the declarator |
| /// itself, try to distribute any type attributes to the appropriate |
| /// declarator chunk. |
| /// |
| /// These are attributes like the following: |
| /// int f ATTR; |
| /// int (f ATTR)(); |
| /// but not necessarily this: |
| /// int f() ATTR; |
| static void distributeTypeAttrsFromDeclarator(TypeProcessingState &state, |
| QualType &declSpecType) { |
| // Collect all the type attributes from the declarator itself. |
| assert(state.getDeclarator().getAttributes() && "declarator has no attrs!"); |
| AttributeList *attr = state.getDeclarator().getAttributes(); |
| AttributeList *next; |
| do { |
| next = attr->getNext(); |
| |
| switch (attr->getKind()) { |
| OBJC_POINTER_TYPE_ATTRS_CASELIST: |
| distributeObjCPointerTypeAttrFromDeclarator(state, *attr, declSpecType); |
| break; |
| |
| case AttributeList::AT_ns_returns_retained: |
| if (!state.getSema().getLangOptions().ObjCAutoRefCount) |
| break; |
| // fallthrough |
| |
| FUNCTION_TYPE_ATTRS_CASELIST: |
| distributeFunctionTypeAttrFromDeclarator(state, *attr, declSpecType); |
| break; |
| |
| default: |
| break; |
| } |
| } while ((attr = next)); |
| } |
| |
| /// Add a synthetic '()' to a block-literal declarator if it is |
| /// required, given the return type. |
| static void maybeSynthesizeBlockSignature(TypeProcessingState &state, |
| QualType declSpecType) { |
| Declarator &declarator = state.getDeclarator(); |
| |
| // First, check whether the declarator would produce a function, |
| // i.e. whether the innermost semantic chunk is a function. |
| if (declarator.isFunctionDeclarator()) { |
| // If so, make that declarator a prototyped declarator. |
| declarator.getFunctionTypeInfo().hasPrototype = true; |
| return; |
| } |
| |
| // If there are any type objects, the type as written won't name a |
| // function, regardless of the decl spec type. This is because a |
| // block signature declarator is always an abstract-declarator, and |
| // abstract-declarators can't just be parentheses chunks. Therefore |
| // we need to build a function chunk unless there are no type |
| // objects and the decl spec type is a function. |
| if (!declarator.getNumTypeObjects() && declSpecType->isFunctionType()) |
| return; |
| |
| // Note that there *are* cases with invalid declarators where |
| // declarators consist solely of parentheses. In general, these |
| // occur only in failed efforts to make function declarators, so |
| // faking up the function chunk is still the right thing to do. |
| |
| // Otherwise, we need to fake up a function declarator. |
| SourceLocation loc = declarator.getSourceRange().getBegin(); |
| |
| // ...and *prepend* it to the declarator. |
| declarator.AddInnermostTypeInfo(DeclaratorChunk::getFunction( |
| /*proto*/ true, |
| /*variadic*/ false, SourceLocation(), |
| /*args*/ 0, 0, |
| /*type quals*/ 0, |
| /*ref-qualifier*/true, SourceLocation(), |
| /*const qualifier*/SourceLocation(), |
| /*volatile qualifier*/SourceLocation(), |
| /*mutable qualifier*/SourceLocation(), |
| /*EH*/ EST_None, SourceLocation(), 0, 0, 0, 0, |
| /*parens*/ loc, loc, |
| declarator)); |
| |
| // For consistency, make sure the state still has us as processing |
| // the decl spec. |
| assert(state.getCurrentChunkIndex() == declarator.getNumTypeObjects() - 1); |
| state.setCurrentChunkIndex(declarator.getNumTypeObjects()); |
| } |
| |
| /// \brief Convert the specified declspec to the appropriate type |
| /// object. |
| /// \param D the declarator containing the declaration specifier. |
| /// \returns The type described by the declaration specifiers. This function |
| /// never returns null. |
| static QualType ConvertDeclSpecToType(TypeProcessingState &state) { |
| // FIXME: Should move the logic from DeclSpec::Finish to here for validity |
| // checking. |
| |
| Sema &S = state.getSema(); |
| Declarator &declarator = state.getDeclarator(); |
| const DeclSpec &DS = declarator.getDeclSpec(); |
| SourceLocation DeclLoc = declarator.getIdentifierLoc(); |
| if (DeclLoc.isInvalid()) |
| DeclLoc = DS.getSourceRange().getBegin(); |
| |
| ASTContext &Context = S.Context; |
| |
| QualType Result; |
| switch (DS.getTypeSpecType()) { |
| case DeclSpec::TST_void: |
| Result = Context.VoidTy; |
| break; |
| case DeclSpec::TST_char: |
| if (DS.getTypeSpecSign() == DeclSpec::TSS_unspecified) |
| Result = Context.CharTy; |
| else if (DS.getTypeSpecSign() == DeclSpec::TSS_signed) |
| Result = Context.SignedCharTy; |
| else { |
| assert(DS.getTypeSpecSign() == DeclSpec::TSS_unsigned && |
| "Unknown TSS value"); |
| Result = Context.UnsignedCharTy; |
| } |
| break; |
| case DeclSpec::TST_wchar: |
| if (DS.getTypeSpecSign() == DeclSpec::TSS_unspecified) |
| Result = Context.WCharTy; |
| else if (DS.getTypeSpecSign() == DeclSpec::TSS_signed) { |
| S.Diag(DS.getTypeSpecSignLoc(), diag::ext_invalid_sign_spec) |
| << DS.getSpecifierName(DS.getTypeSpecType()); |
| Result = Context.getSignedWCharType(); |
| } else { |
| assert(DS.getTypeSpecSign() == DeclSpec::TSS_unsigned && |
| "Unknown TSS value"); |
| S.Diag(DS.getTypeSpecSignLoc(), diag::ext_invalid_sign_spec) |
| << DS.getSpecifierName(DS.getTypeSpecType()); |
| Result = Context.getUnsignedWCharType(); |
| } |
| break; |
| case DeclSpec::TST_char16: |
| assert(DS.getTypeSpecSign() == DeclSpec::TSS_unspecified && |
| "Unknown TSS value"); |
| Result = Context.Char16Ty; |
| break; |
| case DeclSpec::TST_char32: |
| assert(DS.getTypeSpecSign() == DeclSpec::TSS_unspecified && |
| "Unknown TSS value"); |
| Result = Context.Char32Ty; |
| break; |
| case DeclSpec::TST_unspecified: |
| // "<proto1,proto2>" is an objc qualified ID with a missing id. |
| if (DeclSpec::ProtocolQualifierListTy PQ = DS.getProtocolQualifiers()) { |
| Result = Context.getObjCObjectType(Context.ObjCBuiltinIdTy, |
| (ObjCProtocolDecl**)PQ, |
| DS.getNumProtocolQualifiers()); |
| Result = Context.getObjCObjectPointerType(Result); |
| break; |
| } |
| |
| // If this is a missing declspec in a block literal return context, then it |
| // is inferred from the return statements inside the block. |
| // The declspec is always missing in a lambda expr context; it is either |
| // specified with a trailing return type or inferred. |
| if (declarator.getContext() == Declarator::LambdaExprContext || |
| isOmittedBlockReturnType(declarator)) { |
| Result = Context.DependentTy; |
| break; |
| } |
| |
| // Unspecified typespec defaults to int in C90. However, the C90 grammar |
| // [C90 6.5] only allows a decl-spec if there was *some* type-specifier, |
| // type-qualifier, or storage-class-specifier. If not, emit an extwarn. |
| // Note that the one exception to this is function definitions, which are |
| // allowed to be completely missing a declspec. This is handled in the |
| // parser already though by it pretending to have seen an 'int' in this |
| // case. |
| if (S.getLangOptions().ImplicitInt) { |
| // In C89 mode, we only warn if there is a completely missing declspec |
| // when one is not allowed. |
| if (DS.isEmpty()) { |
| S.Diag(DeclLoc, diag::ext_missing_declspec) |
| << DS.getSourceRange() |
| << FixItHint::CreateInsertion(DS.getSourceRange().getBegin(), "int"); |
| } |
| } else if (!DS.hasTypeSpecifier()) { |
| // C99 and C++ require a type specifier. For example, C99 6.7.2p2 says: |
| // "At least one type specifier shall be given in the declaration |
| // specifiers in each declaration, and in the specifier-qualifier list in |
| // each struct declaration and type name." |
| // FIXME: Does Microsoft really have the implicit int extension in C++? |
| if (S.getLangOptions().CPlusPlus && |
| !S.getLangOptions().MicrosoftExt) { |
| S.Diag(DeclLoc, diag::err_missing_type_specifier) |
| << DS.getSourceRange(); |
| |
| // When this occurs in C++ code, often something is very broken with the |
| // value being declared, poison it as invalid so we don't get chains of |
| // errors. |
| declarator.setInvalidType(true); |
| } else { |
| S.Diag(DeclLoc, diag::ext_missing_type_specifier) |
| << DS.getSourceRange(); |
| } |
| } |
| |
| // FALL THROUGH. |
| case DeclSpec::TST_int: { |
| if (DS.getTypeSpecSign() != DeclSpec::TSS_unsigned) { |
| switch (DS.getTypeSpecWidth()) { |
| case DeclSpec::TSW_unspecified: Result = Context.IntTy; break; |
| case DeclSpec::TSW_short: Result = Context.ShortTy; break; |
| case DeclSpec::TSW_long: Result = Context.LongTy; break; |
| case DeclSpec::TSW_longlong: |
| Result = Context.LongLongTy; |
| |
| // long long is a C99 feature. |
| if (!S.getLangOptions().C99) |
| S.Diag(DS.getTypeSpecWidthLoc(), |
| S.getLangOptions().CPlusPlus0x ? |
| diag::warn_cxx98_compat_longlong : diag::ext_longlong); |
| break; |
| } |
| } else { |
| switch (DS.getTypeSpecWidth()) { |
| case DeclSpec::TSW_unspecified: Result = Context.UnsignedIntTy; break; |
| case DeclSpec::TSW_short: Result = Context.UnsignedShortTy; break; |
| case DeclSpec::TSW_long: Result = Context.UnsignedLongTy; break; |
| case DeclSpec::TSW_longlong: |
| Result = Context.UnsignedLongLongTy; |
| |
| // long long is a C99 feature. |
| if (!S.getLangOptions().C99) |
| S.Diag(DS.getTypeSpecWidthLoc(), |
| S.getLangOptions().CPlusPlus0x ? |
| diag::warn_cxx98_compat_longlong : diag::ext_longlong); |
| break; |
| } |
| } |
| break; |
| } |
| case DeclSpec::TST_half: Result = Context.HalfTy; break; |
| case DeclSpec::TST_float: Result = Context.FloatTy; break; |
| case DeclSpec::TST_double: |
| if (DS.getTypeSpecWidth() == DeclSpec::TSW_long) |
| Result = Context.LongDoubleTy; |
| else |
| Result = Context.DoubleTy; |
| |
| if (S.getLangOptions().OpenCL && !S.getOpenCLOptions().cl_khr_fp64) { |
| S.Diag(DS.getTypeSpecTypeLoc(), diag::err_double_requires_fp64); |
| declarator.setInvalidType(true); |
| } |
| break; |
| case DeclSpec::TST_bool: Result = Context.BoolTy; break; // _Bool or bool |
| case DeclSpec::TST_decimal32: // _Decimal32 |
| case DeclSpec::TST_decimal64: // _Decimal64 |
| case DeclSpec::TST_decimal128: // _Decimal128 |
| S.Diag(DS.getTypeSpecTypeLoc(), diag::err_decimal_unsupported); |
| Result = Context.IntTy; |
| declarator.setInvalidType(true); |
| break; |
| case DeclSpec::TST_class: |
| case DeclSpec::TST_enum: |
| case DeclSpec::TST_union: |
| case DeclSpec::TST_struct: { |
| TypeDecl *D = dyn_cast_or_null<TypeDecl>(DS.getRepAsDecl()); |
| if (!D) { |
| // This can happen in C++ with ambiguous lookups. |
| Result = Context.IntTy; |
| declarator.setInvalidType(true); |
| break; |
| } |
| |
| // If the type is deprecated or unavailable, diagnose it. |
| S.DiagnoseUseOfDecl(D, DS.getTypeSpecTypeNameLoc()); |
| |
| assert(DS.getTypeSpecWidth() == 0 && DS.getTypeSpecComplex() == 0 && |
| DS.getTypeSpecSign() == 0 && "No qualifiers on tag names!"); |
| |
| // TypeQuals handled by caller. |
| Result = Context.getTypeDeclType(D); |
| |
| // In both C and C++, make an ElaboratedType. |
| ElaboratedTypeKeyword Keyword |
| = ElaboratedType::getKeywordForTypeSpec(DS.getTypeSpecType()); |
| Result = S.getElaboratedType(Keyword, DS.getTypeSpecScope(), Result); |
| |
| if (D->isInvalidDecl()) |
| declarator.setInvalidType(true); |
| break; |
| } |
| case DeclSpec::TST_typename: { |
| assert(DS.getTypeSpecWidth() == 0 && DS.getTypeSpecComplex() == 0 && |
| DS.getTypeSpecSign() == 0 && |
| "Can't handle qualifiers on typedef names yet!"); |
| Result = S.GetTypeFromParser(DS.getRepAsType()); |
| if (Result.isNull()) |
| declarator.setInvalidType(true); |
| else if (DeclSpec::ProtocolQualifierListTy PQ |
| = DS.getProtocolQualifiers()) { |
| if (const ObjCObjectType *ObjT = Result->getAs<ObjCObjectType>()) { |
| // Silently drop any existing protocol qualifiers. |
| // TODO: determine whether that's the right thing to do. |
| if (ObjT->getNumProtocols()) |
| Result = ObjT->getBaseType(); |
| |
| if (DS.getNumProtocolQualifiers()) |
| Result = Context.getObjCObjectType(Result, |
| (ObjCProtocolDecl**) PQ, |
| DS.getNumProtocolQualifiers()); |
| } else if (Result->isObjCIdType()) { |
| // id<protocol-list> |
| Result = Context.getObjCObjectType(Context.ObjCBuiltinIdTy, |
| (ObjCProtocolDecl**) PQ, |
| DS.getNumProtocolQualifiers()); |
| Result = Context.getObjCObjectPointerType(Result); |
| } else if (Result->isObjCClassType()) { |
| // Class<protocol-list> |
| Result = Context.getObjCObjectType(Context.ObjCBuiltinClassTy, |
| (ObjCProtocolDecl**) PQ, |
| DS.getNumProtocolQualifiers()); |
| Result = Context.getObjCObjectPointerType(Result); |
| } else { |
| S.Diag(DeclLoc, diag::err_invalid_protocol_qualifiers) |
| << DS.getSourceRange(); |
| declarator.setInvalidType(true); |
| } |
| } |
| |
| // TypeQuals handled by caller. |
| break; |
| } |
| case DeclSpec::TST_typeofType: |
| // FIXME: Preserve type source info. |
| Result = S.GetTypeFromParser(DS.getRepAsType()); |
| assert(!Result.isNull() && "Didn't get a type for typeof?"); |
| if (!Result->isDependentType()) |
| if (const TagType *TT = Result->getAs<TagType>()) |
| S.DiagnoseUseOfDecl(TT->getDecl(), DS.getTypeSpecTypeLoc()); |
| // TypeQuals handled by caller. |
| Result = Context.getTypeOfType(Result); |
| break; |
| case DeclSpec::TST_typeofExpr: { |
| Expr *E = DS.getRepAsExpr(); |
| assert(E && "Didn't get an expression for typeof?"); |
| // TypeQuals handled by caller. |
| Result = S.BuildTypeofExprType(E, DS.getTypeSpecTypeLoc()); |
| if (Result.isNull()) { |
| Result = Context.IntTy; |
| declarator.setInvalidType(true); |
| } |
| break; |
| } |
| case DeclSpec::TST_decltype: { |
| Expr *E = DS.getRepAsExpr(); |
| assert(E && "Didn't get an expression for decltype?"); |
| // TypeQuals handled by caller. |
| Result = S.BuildDecltypeType(E, DS.getTypeSpecTypeLoc()); |
| if (Result.isNull()) { |
| Result = Context.IntTy; |
| declarator.setInvalidType(true); |
| } |
| break; |
| } |
| case DeclSpec::TST_underlyingType: |
| Result = S.GetTypeFromParser(DS.getRepAsType()); |
| assert(!Result.isNull() && "Didn't get a type for __underlying_type?"); |
| Result = S.BuildUnaryTransformType(Result, |
| UnaryTransformType::EnumUnderlyingType, |
| DS.getTypeSpecTypeLoc()); |
| if (Result.isNull()) { |
| Result = Context.IntTy; |
| declarator.setInvalidType(true); |
| } |
| break; |
| |
| case DeclSpec::TST_auto: { |
| // TypeQuals handled by caller. |
| Result = Context.getAutoType(QualType()); |
| break; |
| } |
| |
| case DeclSpec::TST_unknown_anytype: |
| Result = Context.UnknownAnyTy; |
| break; |
| |
| case DeclSpec::TST_atomic: |
| Result = S.GetTypeFromParser(DS.getRepAsType()); |
| assert(!Result.isNull() && "Didn't get a type for _Atomic?"); |
| Result = S.BuildAtomicType(Result, DS.getTypeSpecTypeLoc()); |
| if (Result.isNull()) { |
| Result = Context.IntTy; |
| declarator.setInvalidType(true); |
| } |
| break; |
| |
| case DeclSpec::TST_error: |
| Result = Context.IntTy; |
| declarator.setInvalidType(true); |
| break; |
| } |
| |
| // Handle complex types. |
| if (DS.getTypeSpecComplex() == DeclSpec::TSC_complex) { |
| if (S.getLangOptions().Freestanding) |
| S.Diag(DS.getTypeSpecComplexLoc(), diag::ext_freestanding_complex); |
| Result = Context.getComplexType(Result); |
| } else if (DS.isTypeAltiVecVector()) { |
| unsigned typeSize = static_cast<unsigned>(Context.getTypeSize(Result)); |
| assert(typeSize > 0 && "type size for vector must be greater than 0 bits"); |
| VectorType::VectorKind VecKind = VectorType::AltiVecVector; |
| if (DS.isTypeAltiVecPixel()) |
| VecKind = VectorType::AltiVecPixel; |
| else if (DS.isTypeAltiVecBool()) |
| VecKind = VectorType::AltiVecBool; |
| Result = Context.getVectorType(Result, 128/typeSize, VecKind); |
| } |
| |
| // FIXME: Imaginary. |
| if (DS.getTypeSpecComplex() == DeclSpec::TSC_imaginary) |
| S.Diag(DS.getTypeSpecComplexLoc(), diag::err_imaginary_not_supported); |
| |
| // Before we process any type attributes, synthesize a block literal |
| // function declarator if necessary. |
| if (declarator.getContext() == Declarator::BlockLiteralContext) |
| maybeSynthesizeBlockSignature(state, Result); |
| |
| // Apply any type attributes from the decl spec. This may cause the |
| // list of type attributes to be temporarily saved while the type |
| // attributes are pushed around. |
| if (AttributeList *attrs = DS.getAttributes().getList()) |
| processTypeAttrs(state, Result, true, attrs); |
| |
| // Apply const/volatile/restrict qualifiers to T. |
| if (unsigned TypeQuals = DS.getTypeQualifiers()) { |
| |
| // Enforce C99 6.7.3p2: "Types other than pointer types derived from object |
| // or incomplete types shall not be restrict-qualified." C++ also allows |
| // restrict-qualified references. |
| if (TypeQuals & DeclSpec::TQ_restrict) { |
| if (Result->isAnyPointerType() || Result->isReferenceType()) { |
| QualType EltTy; |
| if (Result->isObjCObjectPointerType()) |
| EltTy = Result; |
| else |
| EltTy = Result->isPointerType() ? |
| Result->getAs<PointerType>()->getPointeeType() : |
| Result->getAs<ReferenceType>()->getPointeeType(); |
| |
| // If we have a pointer or reference, the pointee must have an object |
| // incomplete type. |
| if (!EltTy->isIncompleteOrObjectType()) { |
| S.Diag(DS.getRestrictSpecLoc(), |
| diag::err_typecheck_invalid_restrict_invalid_pointee) |
| << EltTy << DS.getSourceRange(); |
| TypeQuals &= ~DeclSpec::TQ_restrict; // Remove the restrict qualifier. |
| } |
| } else { |
| S.Diag(DS.getRestrictSpecLoc(), |
| diag::err_typecheck_invalid_restrict_not_pointer) |
| << Result << DS.getSourceRange(); |
| TypeQuals &= ~DeclSpec::TQ_restrict; // Remove the restrict qualifier. |
| } |
| } |
| |
| // Warn about CV qualifiers on functions: C99 6.7.3p8: "If the specification |
| // of a function type includes any type qualifiers, the behavior is |
| // undefined." |
| if (Result->isFunctionType() && TypeQuals) { |
| // Get some location to point at, either the C or V location. |
| SourceLocation Loc; |
| if (TypeQuals & DeclSpec::TQ_const) |
| Loc = DS.getConstSpecLoc(); |
| else if (TypeQuals & DeclSpec::TQ_volatile) |
| Loc = DS.getVolatileSpecLoc(); |
| else { |
| assert((TypeQuals & DeclSpec::TQ_restrict) && |
| "Has CVR quals but not C, V, or R?"); |
| Loc = DS.getRestrictSpecLoc(); |
| } |
| S.Diag(Loc, diag::warn_typecheck_function_qualifiers) |
| << Result << DS.getSourceRange(); |
| } |
| |
| // C++ [dcl.ref]p1: |
| // Cv-qualified references are ill-formed except when the |
| // cv-qualifiers are introduced through the use of a typedef |
| // (7.1.3) or of a template type argument (14.3), in which |
| // case the cv-qualifiers are ignored. |
| // FIXME: Shouldn't we be checking SCS_typedef here? |
| if (DS.getTypeSpecType() == DeclSpec::TST_typename && |
| TypeQuals && Result->isReferenceType()) { |
| TypeQuals &= ~DeclSpec::TQ_const; |
| TypeQuals &= ~DeclSpec::TQ_volatile; |
| } |
| |
| Qualifiers Quals = Qualifiers::fromCVRMask(TypeQuals); |
| Result = Context.getQualifiedType(Result, Quals); |
| } |
| |
| return Result; |
| } |
| |
| static std::string getPrintableNameForEntity(DeclarationName Entity) { |
| if (Entity) |
| return Entity.getAsString(); |
| |
| return "type name"; |
| } |
| |
| QualType Sema::BuildQualifiedType(QualType T, SourceLocation Loc, |
| Qualifiers Qs) { |
| // Enforce C99 6.7.3p2: "Types other than pointer types derived from |
| // object or incomplete types shall not be restrict-qualified." |
| if (Qs.hasRestrict()) { |
| unsigned DiagID = 0; |
| QualType ProblemTy; |
| |
| const Type *Ty = T->getCanonicalTypeInternal().getTypePtr(); |
| if (const ReferenceType *RTy = dyn_cast<ReferenceType>(Ty)) { |
| if (!RTy->getPointeeType()->isIncompleteOrObjectType()) { |
| DiagID = diag::err_typecheck_invalid_restrict_invalid_pointee; |
| ProblemTy = T->getAs<ReferenceType>()->getPointeeType(); |
| } |
| } else if (const PointerType *PTy = dyn_cast<PointerType>(Ty)) { |
| if (!PTy->getPointeeType()->isIncompleteOrObjectType()) { |
| DiagID = diag::err_typecheck_invalid_restrict_invalid_pointee; |
| ProblemTy = T->getAs<PointerType>()->getPointeeType(); |
| } |
| } else if (const MemberPointerType *PTy = dyn_cast<MemberPointerType>(Ty)) { |
| if (!PTy->getPointeeType()->isIncompleteOrObjectType()) { |
| DiagID = diag::err_typecheck_invalid_restrict_invalid_pointee; |
| ProblemTy = T->getAs<PointerType>()->getPointeeType(); |
| } |
| } else if (!Ty->isDependentType()) { |
| // FIXME: this deserves a proper diagnostic |
| DiagID = diag::err_typecheck_invalid_restrict_invalid_pointee; |
| ProblemTy = T; |
| } |
| |
| if (DiagID) { |
| Diag(Loc, DiagID) << ProblemTy; |
| Qs.removeRestrict(); |
| } |
| } |
| |
| return Context.getQualifiedType(T, Qs); |
| } |
| |
| /// \brief Build a paren type including \p T. |
| QualType Sema::BuildParenType(QualType T) { |
| return Context.getParenType(T); |
| } |
| |
| /// Given that we're building a pointer or reference to the given |
| static QualType inferARCLifetimeForPointee(Sema &S, QualType type, |
| SourceLocation loc, |
| bool isReference) { |
| // Bail out if retention is unrequired or already specified. |
| if (!type->isObjCLifetimeType() || |
| type.getObjCLifetime() != Qualifiers::OCL_None) |
| return type; |
| |
| Qualifiers::ObjCLifetime implicitLifetime = Qualifiers::OCL_None; |
| |
| // If the object type is const-qualified, we can safely use |
| // __unsafe_unretained. This is safe (because there are no read |
| // barriers), and it'll be safe to coerce anything but __weak* to |
| // the resulting type. |
| if (type.isConstQualified()) { |
| implicitLifetime = Qualifiers::OCL_ExplicitNone; |
| |
| // Otherwise, check whether the static type does not require |
| // retaining. This currently only triggers for Class (possibly |
| // protocol-qualifed, and arrays thereof). |
| } else if (type->isObjCARCImplicitlyUnretainedType()) { |
| implicitLifetime = Qualifiers::OCL_ExplicitNone; |
| |
| // If we are in an unevaluated context, like sizeof, skip adding a |
| // qualification. |
| } else if (S.ExprEvalContexts.back().Context == Sema::Unevaluated) { |
| return type; |
| |
| // If that failed, give an error and recover using __strong. __strong |
| // is the option most likely to prevent spurious second-order diagnostics, |
| // like when binding a reference to a field. |
| } else { |
| // These types can show up in private ivars in system headers, so |
| // we need this to not be an error in those cases. Instead we |
| // want to delay. |
| if (S.DelayedDiagnostics.shouldDelayDiagnostics()) { |
| S.DelayedDiagnostics.add( |
| sema::DelayedDiagnostic::makeForbiddenType(loc, |
| diag::err_arc_indirect_no_ownership, type, isReference)); |
| } else { |
| S.Diag(loc, diag::err_arc_indirect_no_ownership) << type << isReference; |
| } |
| implicitLifetime = Qualifiers::OCL_Strong; |
| } |
| assert(implicitLifetime && "didn't infer any lifetime!"); |
| |
| Qualifiers qs; |
| qs.addObjCLifetime(implicitLifetime); |
| return S.Context.getQualifiedType(type, qs); |
| } |
| |
| /// \brief Build a pointer type. |
| /// |
| /// \param T The type to which we'll be building a pointer. |
| /// |
| /// \param Loc The location of the entity whose type involves this |
| /// pointer type or, if there is no such entity, the location of the |
| /// type that will have pointer type. |
| /// |
| /// \param Entity The name of the entity that involves the pointer |
| /// type, if known. |
| /// |
| /// \returns A suitable pointer type, if there are no |
| /// errors. Otherwise, returns a NULL type. |
| QualType Sema::BuildPointerType(QualType T, |
| SourceLocation Loc, DeclarationName Entity) { |
| if (T->isReferenceType()) { |
| // C++ 8.3.2p4: There shall be no ... pointers to references ... |
| Diag(Loc, diag::err_illegal_decl_pointer_to_reference) |
| << getPrintableNameForEntity(Entity) << T; |
| return QualType(); |
| } |
| |
| assert(!T->isObjCObjectType() && "Should build ObjCObjectPointerType"); |
| |
| // In ARC, it is forbidden to build pointers to unqualified pointers. |
| if (getLangOptions().ObjCAutoRefCount) |
| T = inferARCLifetimeForPointee(*this, T, Loc, /*reference*/ false); |
| |
| // Build the pointer type. |
| return Context.getPointerType(T); |
| } |
| |
| /// \brief Build a reference type. |
| /// |
| /// \param T The type to which we'll be building a reference. |
| /// |
| /// \param Loc The location of the entity whose type involves this |
| /// reference type or, if there is no such entity, the location of the |
| /// type that will have reference type. |
| /// |
| /// \param Entity The name of the entity that involves the reference |
| /// type, if known. |
| /// |
| /// \returns A suitable reference type, if there are no |
| /// errors. Otherwise, returns a NULL type. |
| QualType Sema::BuildReferenceType(QualType T, bool SpelledAsLValue, |
| SourceLocation Loc, |
| DeclarationName Entity) { |
| assert(Context.getCanonicalType(T) != Context.OverloadTy && |
| "Unresolved overloaded function type"); |
| |
| // C++0x [dcl.ref]p6: |
| // If a typedef (7.1.3), a type template-parameter (14.3.1), or a |
| // decltype-specifier (7.1.6.2) denotes a type TR that is a reference to a |
| // type T, an attempt to create the type "lvalue reference to cv TR" creates |
| // the type "lvalue reference to T", while an attempt to create the type |
| // "rvalue reference to cv TR" creates the type TR. |
| bool LValueRef = SpelledAsLValue || T->getAs<LValueReferenceType>(); |
| |
| // C++ [dcl.ref]p4: There shall be no references to references. |
| // |
| // According to C++ DR 106, references to references are only |
| // diagnosed when they are written directly (e.g., "int & &"), |
| // but not when they happen via a typedef: |
| // |
| // typedef int& intref; |
| // typedef intref& intref2; |
| // |
| // Parser::ParseDeclaratorInternal diagnoses the case where |
| // references are written directly; here, we handle the |
| // collapsing of references-to-references as described in C++0x. |
| // DR 106 and 540 introduce reference-collapsing into C++98/03. |
| |
| // C++ [dcl.ref]p1: |
| // A declarator that specifies the type "reference to cv void" |
| // is ill-formed. |
| if (T->isVoidType()) { |
| Diag(Loc, diag::err_reference_to_void); |
| return QualType(); |
| } |
| |
| // In ARC, it is forbidden to build references to unqualified pointers. |
| if (getLangOptions().ObjCAutoRefCount) |
| T = inferARCLifetimeForPointee(*this, T, Loc, /*reference*/ true); |
| |
| // Handle restrict on references. |
| if (LValueRef) |
| return Context.getLValueReferenceType(T, SpelledAsLValue); |
| return Context.getRValueReferenceType(T); |
| } |
| |
| /// Check whether the specified array size makes the array type a VLA. If so, |
| /// return true, if not, return the size of the array in SizeVal. |
| static bool isArraySizeVLA(Sema &S, Expr *ArraySize, llvm::APSInt &SizeVal) { |
| // If the size is an ICE, it certainly isn't a VLA. If we're in a GNU mode |
| // (like gnu99, but not c99) accept any evaluatable value as an extension. |
| return S.VerifyIntegerConstantExpression( |
| ArraySize, &SizeVal, S.PDiag(), S.LangOpts.GNUMode, |
| S.PDiag(diag::ext_vla_folded_to_constant)).isInvalid(); |
| } |
| |
| |
| /// \brief Build an array type. |
| /// |
| /// \param T The type of each element in the array. |
| /// |
| /// \param ASM C99 array size modifier (e.g., '*', 'static'). |
| /// |
| /// \param ArraySize Expression describing the size of the array. |
| /// |
| /// \param Loc The location of the entity whose type involves this |
| /// array type or, if there is no such entity, the location of the |
| /// type that will have array type. |
| /// |
| /// \param Entity The name of the entity that involves the array |
| /// type, if known. |
| /// |
| /// \returns A suitable array type, if there are no errors. Otherwise, |
| /// returns a NULL type. |
| QualType Sema::BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, |
| Expr *ArraySize, unsigned Quals, |
| SourceRange Brackets, DeclarationName Entity) { |
| |
| SourceLocation Loc = Brackets.getBegin(); |
| if (getLangOptions().CPlusPlus) { |
| // C++ [dcl.array]p1: |
| // T is called the array element type; this type shall not be a reference |
| // type, the (possibly cv-qualified) type void, a function type or an |
| // abstract class type. |
| // |
| // Note: function types are handled in the common path with C. |
| if (T->isReferenceType()) { |
| Diag(Loc, diag::err_illegal_decl_array_of_references) |
| << getPrintableNameForEntity(Entity) << T; |
| return QualType(); |
| } |
| |
| if (T->isVoidType()) { |
| Diag(Loc, diag::err_illegal_decl_array_incomplete_type) << T; |
| return QualType(); |
| } |
| |
| if (RequireNonAbstractType(Brackets.getBegin(), T, |
| diag::err_array_of_abstract_type)) |
| return QualType(); |
| |
| } else { |
| // C99 6.7.5.2p1: If the element type is an incomplete or function type, |
| // reject it (e.g. void ary[7], struct foo ary[7], void ary[7]()) |
| if (RequireCompleteType(Loc, T, |
| diag::err_illegal_decl_array_incomplete_type)) |
| return QualType(); |
| } |
| |
| if (T->isFunctionType()) { |
| Diag(Loc, diag::err_illegal_decl_array_of_functions) |
| << getPrintableNameForEntity(Entity) << T; |
| return QualType(); |
| } |
| |
| if (T->getContainedAutoType()) { |
| Diag(Loc, diag::err_illegal_decl_array_of_auto) |
| << getPrintableNameForEntity(Entity) << T; |
| return QualType(); |
| } |
| |
| if (const RecordType *EltTy = T->getAs<RecordType>()) { |
| // If the element type is a struct or union that contains a variadic |
| // array, accept it as a GNU extension: C99 6.7.2.1p2. |
| if (EltTy->getDecl()->hasFlexibleArrayMember()) |
| Diag(Loc, diag::ext_flexible_array_in_array) << T; |
| } else if (T->isObjCObjectType()) { |
| Diag(Loc, diag::err_objc_array_of_interfaces) << T; |
| return QualType(); |
| } |
| |
| // Do placeholder conversions on the array size expression. |
| if (ArraySize && ArraySize->hasPlaceholderType()) { |
| ExprResult Result = CheckPlaceholderExpr(ArraySize); |
| if (Result.isInvalid()) return QualType(); |
| ArraySize = Result.take(); |
| } |
| |
| // Do lvalue-to-rvalue conversions on the array size expression. |
| if (ArraySize && !ArraySize->isRValue()) { |
| ExprResult Result = DefaultLvalueConversion(ArraySize); |
| if (Result.isInvalid()) |
| return QualType(); |
| |
| ArraySize = Result.take(); |
| } |
| |
| // C99 6.7.5.2p1: The size expression shall have integer type. |
| // C++11 allows contextual conversions to such types. |
| if (!getLangOptions().CPlusPlus0x && |
| ArraySize && !ArraySize->isTypeDependent() && |
| !ArraySize->getType()->isIntegralOrUnscopedEnumerationType()) { |
| Diag(ArraySize->getLocStart(), diag::err_array_size_non_int) |
| << ArraySize->getType() << ArraySize->getSourceRange(); |
| return QualType(); |
| } |
| |
| llvm::APSInt ConstVal(Context.getTypeSize(Context.getSizeType())); |
| if (!ArraySize) { |
| if (ASM == ArrayType::Star) |
| T = Context.getVariableArrayType(T, 0, ASM, Quals, Brackets); |
| else |
| T = Context.getIncompleteArrayType(T, ASM, Quals); |
| } else if (ArraySize->isTypeDependent() || ArraySize->isValueDependent()) { |
| T = Context.getDependentSizedArrayType(T, ArraySize, ASM, Quals, Brackets); |
| } else if ((!T->isDependentType() && !T->isIncompleteType() && |
| !T->isConstantSizeType()) || |
| isArraySizeVLA(*this, ArraySize, ConstVal)) { |
| // Even in C++11, don't allow contextual conversions in the array bound |
| // of a VLA. |
| if (getLangOptions().CPlusPlus0x && |
| !ArraySize->getType()->isIntegralOrUnscopedEnumerationType()) { |
| Diag(ArraySize->getLocStart(), diag::err_array_size_non_int) |
| << ArraySize->getType() << ArraySize->getSourceRange(); |
| return QualType(); |
| } |
| |
| // C99: an array with an element type that has a non-constant-size is a VLA. |
| // C99: an array with a non-ICE size is a VLA. We accept any expression |
| // that we can fold to a non-zero positive value as an extension. |
| T = Context.getVariableArrayType(T, ArraySize, ASM, Quals, Brackets); |
| } else { |
| // C99 6.7.5.2p1: If the expression is a constant expression, it shall |
| // have a value greater than zero. |
| if (ConstVal.isSigned() && ConstVal.isNegative()) { |
| if (Entity) |
| Diag(ArraySize->getLocStart(), diag::err_decl_negative_array_size) |
| << getPrintableNameForEntity(Entity) << ArraySize->getSourceRange(); |
| else |
| Diag(ArraySize->getLocStart(), diag::err_typecheck_negative_array_size) |
| << ArraySize->getSourceRange(); |
| return QualType(); |
| } |
| if (ConstVal == 0) { |
| // GCC accepts zero sized static arrays. We allow them when |
| // we're not in a SFINAE context. |
| Diag(ArraySize->getLocStart(), |
| isSFINAEContext()? diag::err_typecheck_zero_array_size |
| : diag::ext_typecheck_zero_array_size) |
| << ArraySize->getSourceRange(); |
| |
| if (ASM == ArrayType::Static) { |
| Diag(ArraySize->getLocStart(), |
| diag::warn_typecheck_zero_static_array_size) |
| << ArraySize->getSourceRange(); |
| ASM = ArrayType::Normal; |
| } |
| } else if (!T->isDependentType() && !T->isVariablyModifiedType() && |
| !T->isIncompleteType()) { |
| // Is the array too large? |
| unsigned ActiveSizeBits |
| = ConstantArrayType::getNumAddressingBits(Context, T, ConstVal); |
| if (ActiveSizeBits > ConstantArrayType::getMaxSizeBits(Context)) |
| Diag(ArraySize->getLocStart(), diag::err_array_too_large) |
| << ConstVal.toString(10) |
| << ArraySize->getSourceRange(); |
| } |
| |
| T = Context.getConstantArrayType(T, ConstVal, ASM, Quals); |
| } |
| // If this is not C99, extwarn about VLA's and C99 array size modifiers. |
| if (!getLangOptions().C99) { |
| if (T->isVariableArrayType()) { |
| // Prohibit the use of non-POD types in VLAs. |
| QualType BaseT = Context.getBaseElementType(T); |
| if (!T->isDependentType() && |
| !BaseT.isPODType(Context) && |
| !BaseT->isObjCLifetimeType()) { |
| Diag(Loc, diag::err_vla_non_pod) |
| << BaseT; |
| return QualType(); |
| } |
| // Prohibit the use of VLAs during template argument deduction. |
| else if (isSFINAEContext()) { |
| Diag(Loc, diag::err_vla_in_sfinae); |
| return QualType(); |
| } |
| // Just extwarn about VLAs. |
| else |
| Diag(Loc, diag::ext_vla); |
| } else if (ASM != ArrayType::Normal || Quals != 0) |
| Diag(Loc, |
| getLangOptions().CPlusPlus? diag::err_c99_array_usage_cxx |
| : diag::ext_c99_array_usage) << ASM; |
| } |
| |
| return T; |
| } |
| |
| /// \brief Build an ext-vector type. |
| /// |
| /// Run the required checks for the extended vector type. |
| QualType Sema::BuildExtVectorType(QualType T, Expr *ArraySize, |
| SourceLocation AttrLoc) { |
| // unlike gcc's vector_size attribute, we do not allow vectors to be defined |
| // in conjunction with complex types (pointers, arrays, functions, etc.). |
| if (!T->isDependentType() && |
| !T->isIntegerType() && !T->isRealFloatingType()) { |
| Diag(AttrLoc, diag::err_attribute_invalid_vector_type) << T; |
| return QualType(); |
| } |
| |
| if (!ArraySize->isTypeDependent() && !ArraySize->isValueDependent()) { |
| llvm::APSInt vecSize(32); |
| if (!ArraySize->isIntegerConstantExpr(vecSize, Context)) { |
| Diag(AttrLoc, diag::err_attribute_argument_not_int) |
| << "ext_vector_type" << ArraySize->getSourceRange(); |
| return QualType(); |
| } |
| |
| // unlike gcc's vector_size attribute, the size is specified as the |
| // number of elements, not the number of bytes. |
| unsigned vectorSize = static_cast<unsigned>(vecSize.getZExtValue()); |
| |
| if (vectorSize == 0) { |
| Diag(AttrLoc, diag::err_attribute_zero_size) |
| << ArraySize->getSourceRange(); |
| return QualType(); |
| } |
| |
| return Context.getExtVectorType(T, vectorSize); |
| } |
| |
| return Context.getDependentSizedExtVectorType(T, ArraySize, AttrLoc); |
| } |
| |
| /// \brief Build a function type. |
| /// |
| /// This routine checks the function type according to C++ rules and |
| /// under the assumption that the result type and parameter types have |
| /// just been instantiated from a template. It therefore duplicates |
| /// some of the behavior of GetTypeForDeclarator, but in a much |
| /// simpler form that is only suitable for this narrow use case. |
| /// |
| /// \param T The return type of the function. |
| /// |
| /// \param ParamTypes The parameter types of the function. This array |
| /// will be modified to account for adjustments to the types of the |
| /// function parameters. |
| /// |
| /// \param NumParamTypes The number of parameter types in ParamTypes. |
| /// |
| /// \param Variadic Whether this is a variadic function type. |
| /// |
| /// \param HasTrailingReturn Whether this function has a trailing return type. |
| /// |
| /// \param Quals The cvr-qualifiers to be applied to the function type. |
| /// |
| /// \param Loc The location of the entity whose type involves this |
| /// function type or, if there is no such entity, the location of the |
| /// type that will have function type. |
| /// |
| /// \param Entity The name of the entity that involves the function |
| /// type, if known. |
| /// |
| /// \returns A suitable function type, if there are no |
| /// errors. Otherwise, returns a NULL type. |
| QualType Sema::BuildFunctionType(QualType T, |
| QualType *ParamTypes, |
| unsigned NumParamTypes, |
| bool Variadic, bool HasTrailingReturn, |
| unsigned Quals, |
| RefQualifierKind RefQualifier, |
| SourceLocation Loc, DeclarationName Entity, |
| FunctionType::ExtInfo Info) { |
| if (T->isArrayType() || T->isFunctionType()) { |
| Diag(Loc, diag::err_func_returning_array_function) |
| << T->isFunctionType() << T; |
| return QualType(); |
| } |
| |
| // Functions cannot return half FP. |
| if (T->isHalfType()) { |
| Diag(Loc, diag::err_parameters_retval_cannot_have_fp16_type) << 1 << |
| FixItHint::CreateInsertion(Loc, "*"); |
| return QualType(); |
| } |
| |
| bool Invalid = false; |
| for (unsigned Idx = 0; Idx < NumParamTypes; ++Idx) { |
| // FIXME: Loc is too inprecise here, should use proper locations for args. |
| QualType ParamType = Context.getAdjustedParameterType(ParamTypes[Idx]); |
| if (ParamType->isVoidType()) { |
| Diag(Loc, diag::err_param_with_void_type); |
| Invalid = true; |
| } else if (ParamType->isHalfType()) { |
| // Disallow half FP arguments. |
| Diag(Loc, diag::err_parameters_retval_cannot_have_fp16_type) << 0 << |
| FixItHint::CreateInsertion(Loc, "*"); |
| Invalid = true; |
| } |
| |
| ParamTypes[Idx] = ParamType; |
| } |
| |
| if (Invalid) |
| return QualType(); |
| |
| FunctionProtoType::ExtProtoInfo EPI; |
| EPI.Variadic = Variadic; |
| EPI.HasTrailingReturn = HasTrailingReturn; |
| EPI.TypeQuals = Quals; |
| EPI.RefQualifier = RefQualifier; |
| EPI.ExtInfo = Info; |
| |
| return Context.getFunctionType(T, ParamTypes, NumParamTypes, EPI); |
| } |
| |
| /// \brief Build a member pointer type \c T Class::*. |
| /// |
| /// \param T the type to which the member pointer refers. |
| /// \param Class the class type into which the member pointer points. |
| /// \param Loc the location where this type begins |
| /// \param Entity the name of the entity that will have this member pointer type |
| /// |
| /// \returns a member pointer type, if successful, or a NULL type if there was |
| /// an error. |
| QualType Sema::BuildMemberPointerType(QualType T, QualType Class, |
| SourceLocation Loc, |
| DeclarationName Entity) { |
| // Verify that we're not building a pointer to pointer to function with |
| // exception specification. |
| if (CheckDistantExceptionSpec(T)) { |
| Diag(Loc, diag::err_distant_exception_spec); |
| |
| // FIXME: If we're doing this as part of template instantiation, |
| // we should return immediately. |
| |
| // Build the type anyway, but use the canonical type so that the |
| // exception specifiers are stripped off. |
| T = Context.getCanonicalType(T); |
| } |
| |
| // C++ 8.3.3p3: A pointer to member shall not point to ... a member |
| // with reference type, or "cv void." |
| if (T->isReferenceType()) { |
| Diag(Loc, diag::err_illegal_decl_mempointer_to_reference) |
| << (Entity? Entity.getAsString() : "type name") << T; |
| return QualType(); |
| } |
| |
| if (T->isVoidType()) { |
| Diag(Loc, diag::err_illegal_decl_mempointer_to_void) |
| << (Entity? Entity.getAsString() : "type name"); |
| return QualType(); |
| } |
| |
| if (!Class->isDependentType() && !Class->isRecordType()) { |
| Diag(Loc, diag::err_mempointer_in_nonclass_type) << Class; |
| return QualType(); |
| } |
| |
| // In the Microsoft ABI, the class is allowed to be an incomplete |
| // type. In such cases, the compiler makes a worst-case assumption. |
| // We make no such assumption right now, so emit an error if the |
| // class isn't a complete type. |
| if (Context.getTargetInfo().getCXXABI() == CXXABI_Microsoft && |
| RequireCompleteType(Loc, Class, diag::err_incomplete_type)) |
| return QualType(); |
| |
| return Context.getMemberPointerType(T, Class.getTypePtr()); |
| } |
| |
| /// \brief Build a block pointer type. |
| /// |
| /// \param T The type to which we'll be building a block pointer. |
| /// |
| /// \param CVR The cvr-qualifiers to be applied to the block pointer type. |
| /// |
| /// \param Loc The location of the entity whose type involves this |
| /// block pointer type or, if there is no such entity, the location of the |
| /// type that will have block pointer type. |
| /// |
| /// \param Entity The name of the entity that involves the block pointer |
| /// type, if known. |
| /// |
| /// \returns A suitable block pointer type, if there are no |
| /// errors. Otherwise, returns a NULL type. |
| QualType Sema::BuildBlockPointerType(QualType T, |
| SourceLocation Loc, |
| DeclarationName Entity) { |
| if (!T->isFunctionType()) { |
| Diag(Loc, diag::err_nonfunction_block_type); |
| return QualType(); |
| } |
| |
| return Context.getBlockPointerType(T); |
| } |
| |
| QualType Sema::GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo) { |
| QualType QT = Ty.get(); |
| if (QT.isNull()) { |
| if (TInfo) *TInfo = 0; |
| return QualType(); |
| } |
| |
| TypeSourceInfo *DI = 0; |
| if (const LocInfoType *LIT = dyn_cast<LocInfoType>(QT)) { |
| QT = LIT->getType(); |
| DI = LIT->getTypeSourceInfo(); |
| } |
| |
| if (TInfo) *TInfo = DI; |
| return QT; |
| } |
| |
| static void transferARCOwnershipToDeclaratorChunk(TypeProcessingState &state, |
| Qualifiers::ObjCLifetime ownership, |
| unsigned chunkIndex); |
| |
| /// Given that this is the declaration of a parameter under ARC, |
| /// attempt to infer attributes and such for pointer-to-whatever |
| /// types. |
| static void inferARCWriteback(TypeProcessingState &state, |
| QualType &declSpecType) { |
| Sema &S = state.getSema(); |
| Declarator &declarator = state.getDeclarator(); |
| |
| // TODO: should we care about decl qualifiers? |
| |
| // Check whether the declarator has the expected form. We walk |
| // from the inside out in order to make the block logic work. |
| unsigned outermostPointerIndex = 0; |
| bool isBlockPointer = false; |
| unsigned numPointers = 0; |
| for (unsigned i = 0, e = declarator.getNumTypeObjects(); i != e; ++i) { |
| unsigned chunkIndex = i; |
| DeclaratorChunk &chunk = declarator.getTypeObject(chunkIndex); |
| switch (chunk.Kind) { |
| case DeclaratorChunk::Paren: |
| // Ignore parens. |
| break; |
| |
| case DeclaratorChunk::Reference: |
| case DeclaratorChunk::Pointer: |
| // Count the number of pointers. Treat references |
| // interchangeably as pointers; if they're mis-ordered, normal |
| // type building will discover that. |
| outermostPointerIndex = chunkIndex; |
| numPointers++; |
| break; |
| |
| case DeclaratorChunk::BlockPointer: |
| // If we have a pointer to block pointer, that's an acceptable |
| // indirect reference; anything else is not an application of |
| // the rules. |
| if (numPointers != 1) return; |
| numPointers++; |
| outermostPointerIndex = chunkIndex; |
| isBlockPointer = true; |
| |
| // We don't care about pointer structure in return values here. |
| goto done; |
| |
| case DeclaratorChunk::Array: // suppress if written (id[])? |
| case DeclaratorChunk::Function: |
| case DeclaratorChunk::MemberPointer: |
| return; |
| } |
| } |
| done: |
| |
| // If we have *one* pointer, then we want to throw the qualifier on |
| // the declaration-specifiers, which means that it needs to be a |
| // retainable object type. |
| if (numPointers == 1) { |
| // If it's not a retainable object type, the rule doesn't apply. |
| if (!declSpecType->isObjCRetainableType()) return; |
| |
| // If it already has lifetime, don't do anything. |
| if (declSpecType.getObjCLifetime()) return; |
| |
| // Otherwise, modify the type in-place. |
| Qualifiers qs; |
| |
| if (declSpecType->isObjCARCImplicitlyUnretainedType()) |
| qs.addObjCLifetime(Qualifiers::OCL_ExplicitNone); |
| else |
| qs.addObjCLifetime(Qualifiers::OCL_Autoreleasing); |
| declSpecType = S.Context.getQualifiedType(declSpecType, qs); |
| |
| // If we have *two* pointers, then we want to throw the qualifier on |
| // the outermost pointer. |
| } else if (numPointers == 2) { |
| // If we don't have a block pointer, we need to check whether the |
| // declaration-specifiers gave us something that will turn into a |
| // retainable object pointer after we slap the first pointer on it. |
| if (!isBlockPointer && !declSpecType->isObjCObjectType()) |
| return; |
| |
| // Look for an explicit lifetime attribute there. |
| DeclaratorChunk &chunk = declarator.getTypeObject(outermostPointerIndex); |
| if (chunk.Kind != DeclaratorChunk::Pointer && |
| chunk.Kind != DeclaratorChunk::BlockPointer) |
| return; |
| for (const AttributeList *attr = chunk.getAttrs(); attr; |
| attr = attr->getNext()) |
| if (attr->getKind() == AttributeList::AT_objc_ownership) |
| return; |
| |
| transferARCOwnershipToDeclaratorChunk(state, Qualifiers::OCL_Autoreleasing, |
| outermostPointerIndex); |
| |
| // Any other number of pointers/references does not trigger the rule. |
| } else return; |
| |
| // TODO: mark whether we did this inference? |
| } |
| |
| static void DiagnoseIgnoredQualifiers(unsigned Quals, |
| SourceLocation ConstQualLoc, |
| SourceLocation VolatileQualLoc, |
| SourceLocation RestrictQualLoc, |
| Sema& S) { |
| std::string QualStr; |
| unsigned NumQuals = 0; |
| SourceLocation Loc; |
| |
| FixItHint ConstFixIt; |
| FixItHint VolatileFixIt; |
| FixItHint RestrictFixIt; |
| |
| const SourceManager &SM = S.getSourceManager(); |
| |
| // FIXME: The locations here are set kind of arbitrarily. It'd be nicer to |
| // find a range and grow it to encompass all the qualifiers, regardless of |
| // the order in which they textually appear. |
| if (Quals & Qualifiers::Const) { |
| ConstFixIt = FixItHint::CreateRemoval(ConstQualLoc); |
| QualStr = "const"; |
| ++NumQuals; |
| if (!Loc.isValid() || SM.isBeforeInTranslationUnit(ConstQualLoc, Loc)) |
| Loc = ConstQualLoc; |
| } |
| if (Quals & Qualifiers::Volatile) { |
| VolatileFixIt = FixItHint::CreateRemoval(VolatileQualLoc); |
| QualStr += (NumQuals == 0 ? "volatile" : " volatile"); |
| ++NumQuals; |
| if (!Loc.isValid() || SM.isBeforeInTranslationUnit(VolatileQualLoc, Loc)) |
| Loc = VolatileQualLoc; |
| } |
| if (Quals & Qualifiers::Restrict) { |
| RestrictFixIt = FixItHint::CreateRemoval(RestrictQualLoc); |
| QualStr += (NumQuals == 0 ? "restrict" : " restrict"); |
| ++NumQuals; |
| if (!Loc.isValid() || SM.isBeforeInTranslationUnit(RestrictQualLoc, Loc)) |
| Loc = RestrictQualLoc; |
| } |
| |
| assert(NumQuals > 0 && "No known qualifiers?"); |
| |
| S.Diag(Loc, diag::warn_qual_return_type) |
| << QualStr << NumQuals << ConstFixIt << VolatileFixIt << RestrictFixIt; |
| } |
| |
| static QualType GetDeclSpecTypeForDeclarator(TypeProcessingState &state, |
| TypeSourceInfo *&ReturnTypeInfo) { |
| Sema &SemaRef = state.getSema(); |
| Declarator &D = state.getDeclarator(); |
| QualType T; |
| ReturnTypeInfo = 0; |
| |
| // The TagDecl owned by the DeclSpec. |
| TagDecl *OwnedTagDecl = 0; |
| |
| switch (D.getName().getKind()) { |
| case UnqualifiedId::IK_ImplicitSelfParam: |
| case UnqualifiedId::IK_OperatorFunctionId: |
| case UnqualifiedId::IK_Identifier: |
| case UnqualifiedId::IK_LiteralOperatorId: |
| case UnqualifiedId::IK_TemplateId: |
| T = ConvertDeclSpecToType(state); |
| |
| if (!D.isInvalidType() && D.getDeclSpec().isTypeSpecOwned()) { |
| OwnedTagDecl = cast<TagDecl>(D.getDeclSpec().getRepAsDecl()); |
| // Owned declaration is embedded in declarator. |
| OwnedTagDecl->setEmbeddedInDeclarator(true); |
| } |
| break; |
| |
| case UnqualifiedId::IK_ConstructorName: |
| case UnqualifiedId::IK_ConstructorTemplateId: |
| case UnqualifiedId::IK_DestructorName: |
| // Constructors and destructors don't have return types. Use |
| // "void" instead. |
| T = SemaRef.Context.VoidTy; |
| break; |
| |
| case UnqualifiedId::IK_ConversionFunctionId: |
| // The result type of a conversion function is the type that it |
| // converts to. |
| T = SemaRef.GetTypeFromParser(D.getName().ConversionFunctionId, |
| &ReturnTypeInfo); |
| break; |
| } |
| |
| if (D.getAttributes()) |
| distributeTypeAttrsFromDeclarator(state, T); |
| |
| // C++11 [dcl.spec.auto]p5: reject 'auto' if it is not in an allowed context. |
| // In C++11, a function declarator using 'auto' must have a trailing return |
| // type (this is checked later) and we can skip this. In other languages |
| // using auto, we need to check regardless. |
| if (D.getDeclSpec().getTypeSpecType() == DeclSpec::TST_auto && |
| (!SemaRef.getLangOptions().CPlusPlus0x || !D.isFunctionDeclarator())) { |
| int Error = -1; |
| |
| switch (D.getContext()) { |
| case Declarator::KNRTypeListContext: |
| llvm_unreachable("K&R type lists aren't allowed in C++"); |
| case Declarator::LambdaExprContext: |
| llvm_unreachable("Can't specify a type specifier in lambda grammar"); |
| case Declarator::ObjCParameterContext: |
| case Declarator::ObjCResultContext: |
| case Declarator::PrototypeContext: |
| Error = 0; // Function prototype |
| break; |
| case Declarator::MemberContext: |
| if (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_static) |
| break; |
| switch (cast<TagDecl>(SemaRef.CurContext)->getTagKind()) { |
| case TTK_Enum: llvm_unreachable("unhandled tag kind"); |
| case TTK_Struct: Error = 1; /* Struct member */ break; |
| case TTK_Union: Error = 2; /* Union member */ break; |
| case TTK_Class: Error = 3; /* Class member */ break; |
| } |
| break; |
| case Declarator::CXXCatchContext: |
| case Declarator::ObjCCatchContext: |
| Error = 4; // Exception declaration |
| break; |
| case Declarator::TemplateParamContext: |
| Error = 5; // Template parameter |
| break; |
| case Declarator::BlockLiteralContext: |
| Error = 6; // Block literal |
| break; |
| case Declarator::TemplateTypeArgContext: |
| Error = 7; // Template type argument |
| break; |
| case Declarator::AliasDeclContext: |
| case Declarator::AliasTemplateContext: |
| Error = 9; // Type alias |
| break; |
| case Declarator::TypeNameContext: |
| Error = 11; // Generic |
| break; |
| case Declarator::FileContext: |
| case Declarator::BlockContext: |
| case Declarator::ForContext: |
| case Declarator::ConditionContext: |
| case Declarator::CXXNewContext: |
| break; |
| } |
| |
| if (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef) |
| Error = 8; |
| |
| // In Objective-C it is an error to use 'auto' on a function declarator. |
| if (D.isFunctionDeclarator()) |
| Error = 10; |
| |
| // C++11 [dcl.spec.auto]p2: 'auto' is always fine if the declarator |
| // contains a trailing return type. That is only legal at the outermost |
| // level. Check all declarator chunks (outermost first) anyway, to give |
| // better diagnostics. |
| if (SemaRef.getLangOptions().CPlusPlus0x && Error != -1) { |
| for (unsigned i = 0, e = D.getNumTypeObjects(); i != e; ++i) { |
| unsigned chunkIndex = e - i - 1; |
| state.setCurrentChunkIndex(chunkIndex); |
| DeclaratorChunk &DeclType = D.getTypeObject(chunkIndex); |
| if (DeclType.Kind == DeclaratorChunk::Function) { |
| const DeclaratorChunk::FunctionTypeInfo &FTI = DeclType.Fun; |
| if (FTI.TrailingReturnType) { |
| Error = -1; |
| break; |
| } |
| } |
| } |
| } |
| |
| if (Error != -1) { |
| SemaRef.Diag(D.getDeclSpec().getTypeSpecTypeLoc(), |
| diag::err_auto_not_allowed) |
| << Error; |
| T = SemaRef.Context.IntTy; |
| D.setInvalidType(true); |
| } else |
| SemaRef.Diag(D.getDeclSpec().getTypeSpecTypeLoc(), |
| diag::warn_cxx98_compat_auto_type_specifier); |
| } |
| |
| if (SemaRef.getLangOptions().CPlusPlus && |
| OwnedTagDecl && OwnedTagDecl->isCompleteDefinition()) { |
| // Check the contexts where C++ forbids the declaration of a new class |
| // or enumeration in a type-specifier-seq. |
| switch (D.getContext()) { |
| case Declarator::FileContext: |
| case Declarator::MemberContext: |
| case Declarator::BlockContext: |
| case Declarator::ForContext: |
| case Declarator::BlockLiteralContext: |
| case Declarator::LambdaExprContext: |
| // C++11 [dcl.type]p3: |
| // A type-specifier-seq shall not define a class or enumeration unless |
| // it appears in the type-id of an alias-declaration (7.1.3) that is not |
| // the declaration of a template-declaration. |
| case Declarator::AliasDeclContext: |
| break; |
| case Declarator::AliasTemplateContext: |
| SemaRef.Diag(OwnedTagDecl->getLocation(), |
| diag::err_type_defined_in_alias_template) |
| << SemaRef.Context.getTypeDeclType(OwnedTagDecl); |
| break; |
| case Declarator::TypeNameContext: |
| case Declarator::TemplateParamContext: |
| case Declarator::CXXNewContext: |
| case Declarator::CXXCatchContext: |
| case Declarator::ObjCCatchContext: |
| case Declarator::TemplateTypeArgContext: |
| SemaRef.Diag(OwnedTagDecl->getLocation(), |
| diag::err_type_defined_in_type_specifier) |
| << SemaRef.Context.getTypeDeclType(OwnedTagDecl); |
| break; |
| case Declarator::PrototypeContext: |
| case Declarator::ObjCParameterContext: |
| case Declarator::ObjCResultContext: |
| case Declarator::KNRTypeListContext: |
| // C++ [dcl.fct]p6: |
| // Types shall not be defined in return or parameter types. |
| SemaRef.Diag(OwnedTagDecl->getLocation(), |
| diag::err_type_defined_in_param_type) |
| << SemaRef.Context.getTypeDeclType(OwnedTagDecl); |
| break; |
| case Declarator::ConditionContext: |
| // C++ 6.4p2: |
| // The type-specifier-seq shall not contain typedef and shall not declare |
| // a new class or enumeration. |
| SemaRef.Diag(OwnedTagDecl->getLocation(), |
| diag::err_type_defined_in_condition); |
| break; |
| } |
| } |
| |
| return T; |
| } |
| |
| static std::string getFunctionQualifiersAsString(const FunctionProtoType *FnTy){ |
| std::string Quals = |
| Qualifiers::fromCVRMask(FnTy->getTypeQuals()).getAsString(); |
| |
| switch (FnTy->getRefQualifier()) { |
| case RQ_None: |
| break; |
| |
| case RQ_LValue: |
| if (!Quals.empty()) |
| Quals += ' '; |
| Quals += '&'; |
| break; |
| |
| case RQ_RValue: |
| if (!Quals.empty()) |
| Quals += ' '; |
| Quals += "&&"; |
| break; |
| } |
| |
| return Quals; |
| } |
| |
| /// Check that the function type T, which has a cv-qualifier or a ref-qualifier, |
| /// can be contained within the declarator chunk DeclType, and produce an |
| /// appropriate diagnostic if not. |
| static void checkQualifiedFunction(Sema &S, QualType T, |
| DeclaratorChunk &DeclType) { |
| // C++98 [dcl.fct]p4 / C++11 [dcl.fct]p6: a function type with a |
| // cv-qualifier or a ref-qualifier can only appear at the topmost level |
| // of a type. |
| int DiagKind = -1; |
| switch (DeclType.Kind) { |
| case DeclaratorChunk::Paren: |
| case DeclaratorChunk::MemberPointer: |
| // These cases are permitted. |
| return; |
| case DeclaratorChunk::Array: |
| case DeclaratorChunk::Function: |
| // These cases don't allow function types at all; no need to diagnose the |
| // qualifiers separately. |
| return; |
| case DeclaratorChunk::BlockPointer: |
| DiagKind = 0; |
| break; |
| case DeclaratorChunk::Pointer: |
| DiagKind = 1; |
| break; |
| case DeclaratorChunk::Reference: |
| DiagKind = 2; |
| break; |
| } |
| |
| assert(DiagKind != -1); |
| S.Diag(DeclType.Loc, diag::err_compound_qualified_function_type) |
| << DiagKind << isa<FunctionType>(T.IgnoreParens()) << T |
| << getFunctionQualifiersAsString(T->castAs<FunctionProtoType>()); |
| } |
| |
| static TypeSourceInfo *GetFullTypeForDeclarator(TypeProcessingState &state, |
| QualType declSpecType, |
| TypeSourceInfo *TInfo) { |
| |
| QualType T = declSpecType; |
| Declarator &D = state.getDeclarator(); |
| Sema &S = state.getSema(); |
| ASTContext &Context = S.Context; |
| const LangOptions &LangOpts = S.getLangOptions(); |
| |
| bool ImplicitlyNoexcept = false; |
| if (D.getName().getKind() == UnqualifiedId::IK_OperatorFunctionId && |
| LangOpts.CPlusPlus0x) { |
| OverloadedOperatorKind OO = D.getName().OperatorFunctionId.Operator; |
| /// In C++0x, deallocation functions (normal and array operator delete) |
| /// are implicitly noexcept. |
| if (OO == OO_Delete || OO == OO_Array_Delete) |
| ImplicitlyNoexcept = true; |
| } |
| |
| // The name we're declaring, if any. |
| DeclarationName Name; |
| if (D.getIdentifier()) |
| Name = D.getIdentifier(); |
| |
| // Does this declaration declare a typedef-name? |
| bool IsTypedefName = |
| D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef || |
| D.getContext() == Declarator::AliasDeclContext || |
| D.getContext() == Declarator::AliasTemplateContext; |
| |
| // Does T refer to a function type with a cv-qualifier or a ref-qualifier? |
| bool IsQualifiedFunction = T->isFunctionProtoType() && |
| (T->castAs<FunctionProtoType>()->getTypeQuals() != 0 || |
| T->castAs<FunctionProtoType>()->getRefQualifier() != RQ_None); |
| |
| // Walk the DeclTypeInfo, building the recursive type as we go. |
| // DeclTypeInfos are ordered from the identifier out, which is |
| // opposite of what we want :). |
| for (unsigned i = 0, e = D.getNumTypeObjects(); i != e; ++i) { |
| unsigned chunkIndex = e - i - 1; |
| state.setCurrentChunkIndex(chunkIndex); |
| DeclaratorChunk &DeclType = D.getTypeObject(chunkIndex); |
| if (IsQualifiedFunction) { |
| checkQualifiedFunction(S, T, DeclType); |
| IsQualifiedFunction = DeclType.Kind == DeclaratorChunk::Paren; |
| } |
| switch (DeclType.Kind) { |
| case DeclaratorChunk::Paren: |
| T = S.BuildParenType(T); |
| break; |
| case DeclaratorChunk::BlockPointer: |
| // If blocks are disabled, emit an error. |
| if (!LangOpts.Blocks) |
| S.Diag(DeclType.Loc, diag::err_blocks_disable); |
| |
| T = S.BuildBlockPointerType(T, D.getIdentifierLoc(), Name); |
| if (DeclType.Cls.TypeQuals) |
| T = S.BuildQualifiedType(T, DeclType.Loc, DeclType.Cls.TypeQuals); |
| break; |
| case DeclaratorChunk::Pointer: |
| // Verify that we're not building a pointer to pointer to function with |
| // exception specification. |
| if (LangOpts.CPlusPlus && S.CheckDistantExceptionSpec(T)) { |
| S.Diag(D.getIdentifierLoc(), diag::err_distant_exception_spec); |
| D.setInvalidType(true); |
| // Build the type anyway. |
| } |
| if (LangOpts.ObjC1 && T->getAs<ObjCObjectType>()) { |
| T = Context.getObjCObjectPointerType(T); |
| if (DeclType.Ptr.TypeQuals) |
| T = S.BuildQualifiedType(T, DeclType.Loc, DeclType.Ptr.TypeQuals); |
| break; |
| } |
| T = S.BuildPointerType(T, DeclType.Loc, Name); |
| if (DeclType.Ptr.TypeQuals) |
| T = S.BuildQualifiedType(T, DeclType.Loc, DeclType.Ptr.TypeQuals); |
| |
| break; |
| case DeclaratorChunk::Reference: { |
| // Verify that we're not building a reference to pointer to function with |
| // exception specification. |
| if (LangOpts.CPlusPlus && S.CheckDistantExceptionSpec(T)) { |
| S.Diag(D.getIdentifierLoc(), diag::err_distant_exception_spec); |
| D.setInvalidType(true); |
| // Build the type anyway. |
| } |
| T = S.BuildReferenceType(T, DeclType.Ref.LValueRef, DeclType.Loc, Name); |
| |
| Qualifiers Quals; |
| if (DeclType.Ref.HasRestrict) |
| T = S.BuildQualifiedType(T, DeclType.Loc, Qualifiers::Restrict); |
| break; |
| } |
| case DeclaratorChunk::Array: { |
| // Verify that we're not building an array of pointers to function with |
| // exception specification. |
| if (LangOpts.CPlusPlus && S.CheckDistantExceptionSpec(T)) { |
| S.Diag(D.getIdentifierLoc(), diag::err_distant_exception_spec); |
| D.setInvalidType(true); |
| // Build the type anyway. |
| } |
| DeclaratorChunk::ArrayTypeInfo &ATI = DeclType.Arr; |
| Expr *ArraySize = static_cast<Expr*>(ATI.NumElts); |
| ArrayType::ArraySizeModifier ASM; |
| if (ATI.isStar) |
| ASM = ArrayType::Star; |
| else if (ATI.hasStatic) |
| ASM = ArrayType::Static; |
| else |
| ASM = ArrayType::Normal; |
| if (ASM == ArrayType::Star && !D.isPrototypeContext()) { |
| // FIXME: This check isn't quite right: it allows star in prototypes |
| // for function definitions, and disallows some edge cases detailed |
| // in http://gcc.gnu.org/ml/gcc-patches/2009-02/msg00133.html |
| S.Diag(DeclType.Loc, diag::err_array_star_outside_prototype); |
| ASM = ArrayType::Normal; |
| D.setInvalidType(true); |
| } |
| T = S.BuildArrayType(T, ASM, ArraySize, ATI.TypeQuals, |
| SourceRange(DeclType.Loc, DeclType.EndLoc), Name); |
| break; |
| } |
| case DeclaratorChunk::Function: { |
| // If the function declarator has a prototype (i.e. it is not () and |
| // does not have a K&R-style identifier list), then the arguments are part |
| // of the type, otherwise the argument list is (). |
| const DeclaratorChunk::FunctionTypeInfo &FTI = DeclType.Fun; |
| IsQualifiedFunction = FTI.TypeQuals || FTI.hasRefQualifier(); |
| |
| // Check for auto functions and trailing return type and adjust the |
| // return type accordingly. |
| if (!D.isInvalidType()) { |
| // trailing-return-type is only required if we're declaring a function, |
| // and not, for instance, a pointer to a function. |
| if (D.getDeclSpec().getTypeSpecType() == DeclSpec::TST_auto && |
| !FTI.TrailingReturnType && chunkIndex == 0) { |
| S.Diag(D.getDeclSpec().getTypeSpecTypeLoc(), |
| diag::err_auto_missing_trailing_return); |
| T = Context.IntTy; |
| D.setInvalidType(true); |
| } else if (FTI.TrailingReturnType) { |
| // T must be exactly 'auto' at this point. See CWG issue 681. |
| if (isa<ParenType>(T)) { |
| S.Diag(D.getDeclSpec().getTypeSpecTypeLoc(), |
| diag::err_trailing_return_in_parens) |
| << T << D.getDeclSpec().getSourceRange(); |
| D.setInvalidType(true); |
| } else if (D.getContext() != Declarator::LambdaExprContext && |
| (T.hasQualifiers() || !isa<AutoType>(T))) { |
| S.Diag(D.getDeclSpec().getTypeSpecTypeLoc(), |
| diag::err_trailing_return_without_auto) |
| << T << D.getDeclSpec().getSourceRange(); |
| D.setInvalidType(true); |
| } |
| |
| T = S.GetTypeFromParser( |
| ParsedType::getFromOpaquePtr(FTI.TrailingReturnType), |
| &TInfo); |
| } |
| } |
| |
| // C99 6.7.5.3p1: The return type may not be a function or array type. |
| // For conversion functions, we'll diagnose this particular error later. |
| if ((T->isArrayType() || T->isFunctionType()) && |
| (D.getName().getKind() != UnqualifiedId::IK_ConversionFunctionId)) { |
| unsigned diagID = diag::err_func_returning_array_function; |
| // Last processing chunk in block context means this function chunk |
| // represents the block. |
| if (chunkIndex == 0 && |
| D.getContext() == Declarator::BlockLiteralContext) |
| diagID = diag::err_block_returning_array_function; |
| S.Diag(DeclType.Loc, diagID) << T->isFunctionType() << T; |
| T = Context.IntTy; |
| D.setInvalidType(true); |
| } |
| |
| // Do not allow returning half FP value. |
| // FIXME: This really should be in BuildFunctionType. |
| if (T->isHalfType()) { |
| S.Diag(D.getIdentifierLoc(), |
| diag::err_parameters_retval_cannot_have_fp16_type) << 1 |
| << FixItHint::CreateInsertion(D.getIdentifierLoc(), "*"); |
| D.setInvalidType(true); |
| } |
| |
| // cv-qualifiers on return types are pointless except when the type is a |
| // class type in C++. |
| if (isa<PointerType>(T) && T.getLocalCVRQualifiers() && |
| (D.getName().getKind() != UnqualifiedId::IK_ConversionFunctionId) && |
| (!LangOpts.CPlusPlus || !T->isDependentType())) { |
| assert(chunkIndex + 1 < e && "No DeclaratorChunk for the return type?"); |
| DeclaratorChunk ReturnTypeChunk = D.getTypeObject(chunkIndex + 1); |
| assert(ReturnTypeChunk.Kind == DeclaratorChunk::Pointer); |
| |
| DeclaratorChunk::PointerTypeInfo &PTI = ReturnTypeChunk.Ptr; |
| |
| DiagnoseIgnoredQualifiers(PTI.TypeQuals, |
| SourceLocation::getFromRawEncoding(PTI.ConstQualLoc), |
| SourceLocation::getFromRawEncoding(PTI.VolatileQualLoc), |
| SourceLocation::getFromRawEncoding(PTI.RestrictQualLoc), |
| S); |
| |
| } else if (T.getCVRQualifiers() && D.getDeclSpec().getTypeQualifiers() && |
| (!LangOpts.CPlusPlus || |
| (!T->isDependentType() && !T->isRecordType()))) { |
| |
| DiagnoseIgnoredQualifiers(D.getDeclSpec().getTypeQualifiers(), |
| D.getDeclSpec().getConstSpecLoc(), |
| D.getDeclSpec().getVolatileSpecLoc(), |
| D.getDeclSpec().getRestrictSpecLoc(), |
| S); |
| } |
| |
| if (LangOpts.CPlusPlus && D.getDeclSpec().isTypeSpecOwned()) { |
| // C++ [dcl.fct]p6: |
| // Types shall not be defined in return or parameter types. |
| TagDecl *Tag = cast<TagDecl>(D.getDeclSpec().getRepAsDecl()); |
| if (Tag->isCompleteDefinition()) |
| S.Diag(Tag->getLocation(), diag::err_type_defined_in_result_type) |
| << Context.getTypeDeclType(Tag); |
| } |
| |
| // Exception specs are not allowed in typedefs. Complain, but add it |
| // anyway. |
| if (IsTypedefName && FTI.getExceptionSpecType()) |
| S.Diag(FTI.getExceptionSpecLoc(), diag::err_exception_spec_in_typedef) |
| << (D.getContext() == Declarator::AliasDeclContext || |
| D.getContext() == Declarator::AliasTemplateContext); |
| |
| if (!FTI.NumArgs && !FTI.isVariadic && !LangOpts.CPlusPlus) { |
| // Simple void foo(), where the incoming T is the result type. |
| T = Context.getFunctionNoProtoType(T); |
| } else { |
| // We allow a zero-parameter variadic function in C if the |
| // function is marked with the "overloadable" attribute. Scan |
| // for this attribute now. |
| if (!FTI.NumArgs && FTI.isVariadic && !LangOpts.CPlusPlus) { |
| bool Overloadable = false; |
| for (const AttributeList *Attrs = D.getAttributes(); |
| Attrs; Attrs = Attrs->getNext()) { |
| if (Attrs->getKind() == AttributeList::AT_overloadable) { |
| Overloadable = true; |
| break; |
| } |
| } |
| |
| if (!Overloadable) |
| S.Diag(FTI.getEllipsisLoc(), diag::err_ellipsis_first_arg); |
| } |
| |
| if (FTI.NumArgs && FTI.ArgInfo[0].Param == 0) { |
| // C99 6.7.5.3p3: Reject int(x,y,z) when it's not a function |
| // definition. |
| S.Diag(FTI.ArgInfo[0].IdentLoc, diag::err_ident_list_in_fn_declaration); |
| D.setInvalidType(true); |
| break; |
| } |
| |
| FunctionProtoType::ExtProtoInfo EPI; |
| EPI.Variadic = FTI.isVariadic; |
| EPI.HasTrailingReturn = FTI.TrailingReturnType; |
| EPI.TypeQuals = FTI.TypeQuals; |
| EPI.RefQualifier = !FTI.hasRefQualifier()? RQ_None |
| : FTI.RefQualifierIsLValueRef? RQ_LValue |
| : RQ_RValue; |
| |
| // Otherwise, we have a function with an argument list that is |
| // potentially variadic. |
| SmallVector<QualType, 16> ArgTys; |
| ArgTys.reserve(FTI.NumArgs); |
| |
| SmallVector<bool, 16> ConsumedArguments; |
| ConsumedArguments.reserve(FTI.NumArgs); |
| bool HasAnyConsumedArguments = false; |
| |
| for (unsigned i = 0, e = FTI.NumArgs; i != e; ++i) { |
| ParmVarDecl *Param = cast<ParmVarDecl>(FTI.ArgInfo[i].Param); |
| QualType ArgTy = Param->getType(); |
| assert(!ArgTy.isNull() && "Couldn't parse type?"); |
| |
| // Adjust the parameter type. |
| assert((ArgTy == Context.getAdjustedParameterType(ArgTy)) && |
| "Unadjusted type?"); |
| |
| // Look for 'void'. void is allowed only as a single argument to a |
| // function with no other parameters (C99 6.7.5.3p10). We record |
| // int(void) as a FunctionProtoType with an empty argument list. |
| if (ArgTy->isVoidType()) { |
| // If this is something like 'float(int, void)', reject it. 'void' |
| // is an incomplete type (C99 6.2.5p19) and function decls cannot |
| // have arguments of incomplete type. |
| if (FTI.NumArgs != 1 || FTI.isVariadic) { |
| S.Diag(DeclType.Loc, diag::err_void_only_param); |
| ArgTy = Context.IntTy; |
| Param->setType(ArgTy); |
| } else if (FTI.ArgInfo[i].Ident) { |
| // Reject, but continue to parse 'int(void abc)'. |
| S.Diag(FTI.ArgInfo[i].IdentLoc, |
| diag::err_param_with_void_type); |
| ArgTy = Context.IntTy; |
| Param->setType(ArgTy); |
| } else { |
| // Reject, but continue to parse 'float(const void)'. |
| if (ArgTy.hasQualifiers()) |
| S.Diag(DeclType.Loc, diag::err_void_param_qualified); |
| |
| // Do not add 'void' to the ArgTys list. |
| break; |
| } |
| } else if (ArgTy->isHalfType()) { |
| // Disallow half FP arguments. |
| // FIXME: This really should be in BuildFunctionType. |
| S.Diag(Param->getLocation(), |
| diag::err_parameters_retval_cannot_have_fp16_type) << 0 |
| << FixItHint::CreateInsertion(Param->getLocation(), "*"); |
| D.setInvalidType(); |
| } else if (!FTI.hasPrototype) { |
| if (ArgTy->isPromotableIntegerType()) { |
| ArgTy = Context.getPromotedIntegerType(ArgTy); |
| Param->setKNRPromoted(true); |
| } else if (const BuiltinType* BTy = ArgTy->getAs<BuiltinType>()) { |
| if (BTy->getKind() == BuiltinType::Float) { |
| ArgTy = Context.DoubleTy; |
| Param->setKNRPromoted(true); |
| } |
| } |
| } |
| |
| if (LangOpts.ObjCAutoRefCount) { |
| bool Consumed = Param->hasAttr<NSConsumedAttr>(); |
| ConsumedArguments.push_back(Consumed); |
| HasAnyConsumedArguments |= Consumed; |
| } |
| |
| ArgTys.push_back(ArgTy); |
| } |
| |
| if (HasAnyConsumedArguments) |
| EPI.ConsumedArguments = ConsumedArguments.data(); |
| |
| SmallVector<QualType, 4> Exceptions; |
| EPI.ExceptionSpecType = FTI.getExceptionSpecType(); |
| if (FTI.getExceptionSpecType() == EST_Dynamic) { |
| Exceptions.reserve(FTI.NumExceptions); |
| for (unsigned ei = 0, ee = FTI.NumExceptions; ei != ee; ++ei) { |
| // FIXME: Preserve type source info. |
| QualType ET = S.GetTypeFromParser(FTI.Exceptions[ei].Ty); |
| // Check that the type is valid for an exception spec, and |
| // drop it if not. |
| if (!S.CheckSpecifiedExceptionType(ET, FTI.Exceptions[ei].Range)) |
| Exceptions.push_back(ET); |
| } |
| EPI.NumExceptions = Exceptions.size(); |
| EPI.Exceptions = Exceptions.data(); |
| } else if (FTI.getExceptionSpecType() == EST_ComputedNoexcept) { |
| // If an error occurred, there's no expression here. |
| if (Expr *NoexceptExpr = FTI.NoexceptExpr) { |
| assert((NoexceptExpr->isTypeDependent() || |
| NoexceptExpr->getType()->getCanonicalTypeUnqualified() == |
| Context.BoolTy) && |
| "Parser should have made sure that the expression is boolean"); |
| if (!NoexceptExpr->isValueDependent()) |
| NoexceptExpr = S.VerifyIntegerConstantExpression(NoexceptExpr, 0, |
| S.PDiag(diag::err_noexcept_needs_constant_expression), |
| /*AllowFold*/ false).take(); |
| EPI.NoexceptExpr = NoexceptExpr; |
| } |
| } else if (FTI.getExceptionSpecType() == EST_None && |
| ImplicitlyNoexcept && chunkIndex == 0) { |
| // Only the outermost chunk is marked noexcept, of course. |
| EPI.ExceptionSpecType = EST_BasicNoexcept; |
| } |
| |
| T = Context.getFunctionType(T, ArgTys.data(), ArgTys.size(), EPI); |
| } |
| |
| break; |
| } |
| case DeclaratorChunk::MemberPointer: |
| // The scope spec must refer to a class, or be dependent. |
| CXXScopeSpec &SS = DeclType.Mem.Scope(); |
| QualType ClsType; |
| if (SS.isInvalid()) { |
| // Avoid emitting extra errors if we already errored on the scope. |
| D.setInvalidType(true); |
| } else if (S.isDependentScopeSpecifier(SS) || |
| dyn_cast_or_null<CXXRecordDecl>(S.computeDeclContext(SS))) { |
| NestedNameSpecifier *NNS |
| = static_cast<NestedNameSpecifier*>(SS.getScopeRep()); |
| NestedNameSpecifier *NNSPrefix = NNS->getPrefix(); |
| switch (NNS->getKind()) { |
| case NestedNameSpecifier::Identifier: |
| ClsType = Context.getDependentNameType(ETK_None, NNSPrefix, |
| NNS->getAsIdentifier()); |
| break; |
| |
| case NestedNameSpecifier::Namespace: |
| case NestedNameSpecifier::NamespaceAlias: |
| case NestedNameSpecifier::Global: |
| llvm_unreachable("Nested-name-specifier must name a type"); |
| |
| case NestedNameSpecifier::TypeSpec: |
| case NestedNameSpecifier::TypeSpecWithTemplate: |
| ClsType = QualType(NNS->getAsType(), 0); |
| // Note: if the NNS has a prefix and ClsType is a nondependent |
| // TemplateSpecializationType, then the NNS prefix is NOT included |
| // in ClsType; hence we wrap ClsType into an ElaboratedType. |
| // NOTE: in particular, no wrap occurs if ClsType already is an |
| // Elaborated, DependentName, or DependentTemplateSpecialization. |
| if (NNSPrefix && isa<TemplateSpecializationType>(NNS->getAsType())) |
| ClsType = Context.getElaboratedType(ETK_None, NNSPrefix, ClsType); |
| break; |
| } |
| } else { |
| S.Diag(DeclType.Mem.Scope().getBeginLoc(), |
| diag::err_illegal_decl_mempointer_in_nonclass) |
| << (D.getIdentifier() ? D.getIdentifier()->getName() : "type name") |
| << DeclType.Mem.Scope().getRange(); |
| D.setInvalidType(true); |
| } |
| |
| if (!ClsType.isNull()) |
| T = S.BuildMemberPointerType(T, ClsType, DeclType.Loc, D.getIdentifier()); |
| if (T.isNull()) { |
| T = Context.IntTy; |
| D.setInvalidType(true); |
| } else if (DeclType.Mem.TypeQuals) { |
| T = S.BuildQualifiedType(T, DeclType.Loc, DeclType.Mem.TypeQuals); |
| } |
| break; |
| } |
| |
| if (T.isNull()) { |
| D.setInvalidType(true); |
| T = Context.IntTy; |
| } |
| |
| // See if there are any attributes on this declarator chunk. |
| if (AttributeList *attrs = const_cast<AttributeList*>(DeclType.getAttrs())) |
| processTypeAttrs(state, T, false, attrs); |
| } |
| |
| if (LangOpts.CPlusPlus && T->isFunctionType()) { |
| const FunctionProtoType *FnTy = T->getAs<FunctionProtoType>(); |
| assert(FnTy && "Why oh why is there not a FunctionProtoType here?"); |
| |
| // C++ 8.3.5p4: |
| // A cv-qualifier-seq shall only be part of the function type |
| // for a nonstatic member function, the function type to which a pointer |
| // to member refers, or the top-level function type of a function typedef |
| // declaration. |
| // |
| // Core issue 547 also allows cv-qualifiers on function types that are |
| // top-level template type arguments. |
| bool FreeFunction; |
| if (!D.getCXXScopeSpec().isSet()) { |
| FreeFunction = ((D.getContext() != Declarator::MemberContext && |
| D.getContext() != Declarator::LambdaExprContext) || |
| D.getDeclSpec().isFriendSpecified()); |
| } else { |
| DeclContext *DC = S.computeDeclContext(D.getCXXScopeSpec()); |
| FreeFunction = (DC && !DC->isRecord()); |
| } |
| |
| // C++0x [dcl.constexpr]p8: A constexpr specifier for a non-static member |
| // function that is not a constructor declares that function to be const. |
| if (D.getDeclSpec().isConstexprSpecified() && !FreeFunction && |
| D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_static && |
| D.getName().getKind() != UnqualifiedId::IK_ConstructorName && |
| D.getName().getKind() != UnqualifiedId::IK_ConstructorTemplateId && |
| !(FnTy->getTypeQuals() & DeclSpec::TQ_const)) { |
| // Rebuild function type adding a 'const' qualifier. |
| FunctionProtoType::ExtProtoInfo EPI = FnTy->getExtProtoInfo(); |
| EPI.TypeQuals |= DeclSpec::TQ_const; |
| T = Context.getFunctionType(FnTy->getResultType(), |
| FnTy->arg_type_begin(), |
| FnTy->getNumArgs(), EPI); |
| } |
| |
| // C++11 [dcl.fct]p6 (w/DR1417): |
| // An attempt to specify a function type with a cv-qualifier-seq or a |
| // ref-qualifier (including by typedef-name) is ill-formed unless it is: |
| // - the function type for a non-static member function, |
| // - the function type to which a pointer to member refers, |
| // - the top-level function type of a function typedef declaration or |
| // alias-declaration, |
| // - the type-id in the default argument of a type-parameter, or |
| // - the type-id of a template-argument for a type-parameter |
| if (IsQualifiedFunction && |
| !(!FreeFunction && |
| D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_static) && |
| !IsTypedefName && |
| D.getContext() != Declarator::TemplateTypeArgContext) { |
| SourceLocation Loc = D.getSourceRange().getBegin(); |
| SourceRange RemovalRange; |
| unsigned I; |
| if (D.isFunctionDeclarator(I)) { |
| SmallVector<SourceLocation, 4> RemovalLocs; |
| const DeclaratorChunk &Chunk = D.getTypeObject(I); |
| assert(Chunk.Kind == DeclaratorChunk::Function); |
| if (Chunk.Fun.hasRefQualifier()) |
| RemovalLocs.push_back(Chunk.Fun.getRefQualifierLoc()); |
| if (Chunk.Fun.TypeQuals & Qualifiers::Const) |
| RemovalLocs.push_back(Chunk.Fun.getConstQualifierLoc()); |
| if (Chunk.Fun.TypeQuals & Qualifiers::Volatile) |
| RemovalLocs.push_back(Chunk.Fun.getVolatileQualifierLoc()); |
| // FIXME: We do not track the location of the __restrict qualifier. |
| //if (Chunk.Fun.TypeQuals & Qualifiers::Restrict) |
| // RemovalLocs.push_back(Chunk.Fun.getRestrictQualifierLoc()); |
| if (!RemovalLocs.empty()) { |
| std::sort(RemovalLocs.begin(), RemovalLocs.end(), |
| SourceManager::LocBeforeThanCompare(S.getSourceManager())); |
| RemovalRange = SourceRange(RemovalLocs.front(), RemovalLocs.back()); |
| Loc = RemovalLocs.front(); |
| } |
| } |
| |
| S.Diag(Loc, diag::err_invalid_qualified_function_type) |
| << FreeFunction << D.isFunctionDeclarator() << T |
| << getFunctionQualifiersAsString(FnTy) |
| << FixItHint::CreateRemoval(RemovalRange); |
| |
| // Strip the cv-qualifiers and ref-qualifiers from the type. |
| FunctionProtoType::ExtProtoInfo EPI = FnTy->getExtProtoInfo(); |
| EPI.TypeQuals = 0; |
| EPI.RefQualifier = RQ_None; |
| |
| T = Context.getFunctionType(FnTy->getResultType(), |
| FnTy->arg_type_begin(), |
| FnTy->getNumArgs(), EPI); |
| } |
| } |
| |
| // Apply any undistributed attributes from the declarator. |
| if (!T.isNull()) |
| if (AttributeList *attrs = D.getAttributes()) |
| processTypeAttrs(state, T, false, attrs); |
| |
| // Diagnose any ignored type attributes. |
| if (!T.isNull()) state.diagnoseIgnoredTypeAttrs(T); |
| |
| // C++0x [dcl.constexpr]p9: |
| // A constexpr specifier used in an object declaration declares the object |
| // as const. |
| if (D.getDeclSpec().isConstexprSpecified() && T->isObjectType()) { |
| T.addConst(); |
| } |
| |
| // If there was an ellipsis in the declarator, the declaration declares a |
| // parameter pack whose type may be a pack expansion type. |
| if (D.hasEllipsis() && !T.isNull()) { |
| // C++0x [dcl.fct]p13: |
| // A declarator-id or abstract-declarator containing an ellipsis shall |
| // only be used in a parameter-declaration. Such a parameter-declaration |
| // is a parameter pack (14.5.3). [...] |
| switch (D.getContext()) { |
| case Declarator::PrototypeContext: |
| // C++0x [dcl.fct]p13: |
| // [...] When it is part of a parameter-declaration-clause, the |
| // parameter pack is a function parameter pack (14.5.3). The type T |
| // of the declarator-id of the function parameter pack shall contain |
| // a template parameter pack; each template parameter pack in T is |
| // expanded by the function parameter pack. |
| // |
| // We represent function parameter packs as function parameters whose |
| // type is a pack expansion. |
| if (!T->containsUnexpandedParameterPack()) { |
| S.Diag(D.getEllipsisLoc(), |
| diag::err_function_parameter_pack_without_parameter_packs) |
| << T << D.getSourceRange(); |
| D.setEllipsisLoc(SourceLocation()); |
| } else { |
| T = Context.getPackExpansionType(T, llvm::Optional<unsigned>()); |
| } |
| break; |
| |
| case Declarator::TemplateParamContext: |
| // C++0x [temp.param]p15: |
| // If a template-parameter is a [...] is a parameter-declaration that |
| // declares a parameter pack (8.3.5), then the template-parameter is a |
| // template parameter pack (14.5.3). |
| // |
| // Note: core issue 778 clarifies that, if there are any unexpanded |
| // parameter packs in the type of the non-type template parameter, then |
| // it expands those parameter packs. |
| if (T->containsUnexpandedParameterPack()) |
| T = Context.getPackExpansionType(T, llvm::Optional<unsigned>()); |
| else |
| S.Diag(D.getEllipsisLoc(), |
| LangOpts.CPlusPlus0x |
| ? diag::warn_cxx98_compat_variadic_templates |
| : diag::ext_variadic_templates); |
| break; |
| |
| case Declarator::FileContext: |
| case Declarator::KNRTypeListContext: |
| case Declarator::ObjCParameterContext: // FIXME: special diagnostic here? |
| case Declarator::ObjCResultContext: // FIXME: special diagnostic here? |
| case Declarator::TypeNameContext: |
| case Declarator::CXXNewContext: |
| case Declarator::AliasDeclContext: |
| case Declarator::AliasTemplateContext: |
| case Declarator::MemberContext: |
| case Declarator::BlockContext: |
| case Declarator::ForContext: |
| case Declarator::ConditionContext: |
| case Declarator::CXXCatchContext: |
| case Declarator::ObjCCatchContext: |
| case Declarator::BlockLiteralContext: |
| case Declarator::LambdaExprContext: |
| case Declarator::TemplateTypeArgContext: |
| // FIXME: We may want to allow parameter packs in block-literal contexts |
| // in the future. |
| S.Diag(D.getEllipsisLoc(), diag::err_ellipsis_in_declarator_not_parameter); |
| D.setEllipsisLoc(SourceLocation()); |
| break; |
| } |
| } |
| |
| if (T.isNull()) |
| return Context.getNullTypeSourceInfo(); |
| else if (D.isInvalidType()) |
| return Context.getTrivialTypeSourceInfo(T); |
| |
| return S.GetTypeSourceInfoForDeclarator(D, T, TInfo); |
| } |
| |
| /// GetTypeForDeclarator - Convert the type for the specified |
| /// declarator to Type instances. |
| /// |
| /// The result of this call will never be null, but the associated |
| /// type may be a null type if there's an unrecoverable error. |
| TypeSourceInfo *Sema::GetTypeForDeclarator(Declarator &D, Scope *S) { |
| // Determine the type of the declarator. Not all forms of declarator |
| // have a type. |
| |
| TypeProcessingState state(*this, D); |
| |
| TypeSourceInfo *ReturnTypeInfo = 0; |
| QualType T = GetDeclSpecTypeForDeclarator(state, ReturnTypeInfo); |
| if (T.isNull()) |
| return Context.getNullTypeSourceInfo(); |
| |
| if (D.isPrototypeContext() && getLangOptions().ObjCAutoRefCount) |
| inferARCWriteback(state, T); |
| |
| return GetFullTypeForDeclarator(state, T, ReturnTypeInfo); |
| } |
| |
| static void transferARCOwnershipToDeclSpec(Sema &S, |
| QualType &declSpecTy, |
| Qualifiers::ObjCLifetime ownership) { |
| if (declSpecTy->isObjCRetainableType() && |
| declSpecTy.getObjCLifetime() == Qualifiers::OCL_None) { |
| Qualifiers qs; |
| qs.addObjCLifetime(ownership); |
| declSpecTy = S.Context.getQualifiedType(declSpecTy, qs); |
| } |
| } |
| |
| static void transferARCOwnershipToDeclaratorChunk(TypeProcessingState &state, |
| Qualifiers::ObjCLifetime ownership, |
| unsigned chunkIndex) { |
| Sema &S = state.getSema(); |
| Declarator &D = state.getDeclarator(); |
| |
| // Look for an explicit lifetime attribute. |
| DeclaratorChunk &chunk = D.getTypeObject(chunkIndex); |
| for (const AttributeList *attr = chunk.getAttrs(); attr; |
| attr = attr->getNext()) |
| if (attr->getKind() == AttributeList::AT_objc_ownership) |
| return; |
| |
| const char *attrStr = 0; |
| switch (ownership) { |
| case Qualifiers::OCL_None: llvm_unreachable("no ownership!"); |
| case Qualifiers::OCL_ExplicitNone: attrStr = "none"; break; |
| case Qualifiers::OCL_Strong: attrStr = "strong"; break; |
| case Qualifiers::OCL_Weak: attrStr = "weak"; break; |
| case Qualifiers::OCL_Autoreleasing: attrStr = "autoreleasing"; break; |
| } |
| |
| // If there wasn't one, add one (with an invalid source location |
| // so that we don't make an AttributedType for it). |
| AttributeList *attr = D.getAttributePool() |
| .create(&S.Context.Idents.get("objc_ownership"), SourceLocation(), |
| /*scope*/ 0, SourceLocation(), |
| &S.Context.Idents.get(attrStr), SourceLocation(), |
| /*args*/ 0, 0, |
| /*declspec*/ false, /*C++0x*/ false); |
| spliceAttrIntoList(*attr, chunk.getAttrListRef()); |
| |
| // TODO: mark whether we did this inference? |
| } |
| |
| /// \brief Used for transfering ownership in casts resulting in l-values. |
| static void transferARCOwnership(TypeProcessingState &state, |
| QualType &declSpecTy, |
| Qualifiers::ObjCLifetime ownership) { |
| Sema &S = state.getSema(); |
| Declarator &D = state.getDeclarator(); |
| |
| int inner = -1; |
| bool hasIndirection = false; |
| for (unsigned i = 0, e = D.getNumTypeObjects(); i != e; ++i) { |
| DeclaratorChunk &chunk = D.getTypeObject(i); |
| switch (chunk.Kind) { |
| case DeclaratorChunk::Paren: |
| // Ignore parens. |
| break; |
| |
| case DeclaratorChunk::Array: |
| case DeclaratorChunk::Reference: |
| case DeclaratorChunk::Pointer: |
| if (inner != -1) |
| hasIndirection = true; |
| inner = i; |
| break; |
| |
| case DeclaratorChunk::BlockPointer: |
| if (inner != -1) |
| transferARCOwnershipToDeclaratorChunk(state, ownership, i); |
| return; |
| |
| case DeclaratorChunk::Function: |
| case DeclaratorChunk::MemberPointer: |
| return; |
| } |
| } |
| |
| if (inner == -1) |
| return; |
| |
| DeclaratorChunk &chunk = D.getTypeObject(inner); |
| if (chunk.Kind == DeclaratorChunk::Pointer) { |
| if (declSpecTy->isObjCRetainableType()) |
| return transferARCOwnershipToDeclSpec(S, declSpecTy, ownership); |
| if (declSpecTy->isObjCObjectType() && hasIndirection) |
| return transferARCOwnershipToDeclaratorChunk(state, ownership, inner); |
| } else { |
| assert(chunk.Kind == DeclaratorChunk::Array || |
| chunk.Kind == DeclaratorChunk::Reference); |
| return transferARCOwnershipToDeclSpec(S, declSpecTy, ownership); |
| } |
| } |
| |
| TypeSourceInfo *Sema::GetTypeForDeclaratorCast(Declarator &D, QualType FromTy) { |
| TypeProcessingState state(*this, D); |
| |
| TypeSourceInfo *ReturnTypeInfo = 0; |
| QualType declSpecTy = GetDeclSpecTypeForDeclarator(state, ReturnTypeInfo); |
| if (declSpecTy.isNull()) |
| return Context.getNullTypeSourceInfo(); |
| |
| if (getLangOptions().ObjCAutoRefCount) { |
| Qualifiers::ObjCLifetime ownership = Context.getInnerObjCOwnership(FromTy); |
| if (ownership != Qualifiers::OCL_None) |
| transferARCOwnership(state, declSpecTy, ownership); |
| } |
| |
| return GetFullTypeForDeclarator(state, declSpecTy, ReturnTypeInfo); |
| } |
| |
| /// Map an AttributedType::Kind to an AttributeList::Kind. |
| static AttributeList::Kind getAttrListKind(AttributedType::Kind kind) { |
| switch (kind) { |
| case AttributedType::attr_address_space: |
| return AttributeList::AT_address_space; |
| case AttributedType::attr_regparm: |
| return AttributeList::AT_regparm; |
| case AttributedType::attr_vector_size: |
| return AttributeList::AT_vector_size; |
| case AttributedType::attr_neon_vector_type: |
| return AttributeList::AT_neon_vector_type; |
| case AttributedType::attr_neon_polyvector_type: |
| return AttributeList::AT_neon_polyvector_type; |
| case AttributedType::attr_objc_gc: |
| return AttributeList::AT_objc_gc; |
| case AttributedType::attr_objc_ownership: |
| return AttributeList::AT_objc_ownership; |
| case AttributedType::attr_noreturn: |
| return AttributeList::AT_noreturn; |
| case AttributedType::attr_cdecl: |
| return AttributeList::AT_cdecl; |
| case AttributedType::attr_fastcall: |
| return AttributeList::AT_fastcall; |
| case AttributedType::attr_stdcall: |
| return AttributeList::AT_stdcall; |
| case AttributedType::attr_thiscall: |
| return AttributeList::AT_thiscall; |
| case AttributedType::attr_pascal: |
| return AttributeList::AT_pascal; |
| case AttributedType::attr_pcs: |
| return AttributeList::AT_pcs; |
| } |
| llvm_unreachable("unexpected attribute kind!"); |
| } |
| |
| static void fillAttributedTypeLoc(AttributedTypeLoc TL, |
| const AttributeList *attrs) { |
| AttributedType::Kind kind = TL.getAttrKind(); |
| |
| assert(attrs && "no type attributes in the expected location!"); |
| AttributeList::Kind parsedKind = getAttrListKind(kind); |
| while (attrs->getKind() != parsedKind) { |
| attrs = attrs->getNext(); |
| assert(attrs && "no matching attribute in expected location!"); |
| } |
| |
| TL.setAttrNameLoc(attrs->getLoc()); |
| if (TL.hasAttrExprOperand()) |
| TL.setAttrExprOperand(attrs->getArg(0)); |
| else if (TL.hasAttrEnumOperand()) |
| TL.setAttrEnumOperandLoc(attrs->getParameterLoc()); |
| |
| // FIXME: preserve this information to here. |
| if (TL.hasAttrOperand()) |
| TL.setAttrOperandParensRange(SourceRange()); |
| } |
| |
| namespace { |
| class TypeSpecLocFiller : public TypeLocVisitor<TypeSpecLocFiller> { |
| ASTContext &Context; |
| const DeclSpec &DS; |
| |
| public: |
| TypeSpecLocFiller(ASTContext &Context, const DeclSpec &DS) |
| : Context(Context), DS(DS) {} |
| |
| void VisitAttributedTypeLoc(AttributedTypeLoc TL) { |
| fillAttributedTypeLoc(TL, DS.getAttributes().getList()); |
| Visit(TL.getModifiedLoc()); |
| } |
| void VisitQualifiedTypeLoc(QualifiedTypeLoc TL) { |
| Visit(TL.getUnqualifiedLoc()); |
| } |
| void VisitTypedefTypeLoc(TypedefTypeLoc TL) { |
| TL.setNameLoc(DS.getTypeSpecTypeLoc()); |
| } |
| void VisitObjCInterfaceTypeLoc(ObjCInterfaceTypeLoc TL) { |
| TL.setNameLoc(DS.getTypeSpecTypeLoc()); |
| } |
| void VisitObjCObjectTypeLoc(ObjCObjectTypeLoc TL) { |
| // Handle the base type, which might not have been written explicitly. |
| if (DS.getTypeSpecType() == DeclSpec::TST_unspecified) { |
| TL.setHasBaseTypeAsWritten(false); |
| TL.getBaseLoc().initialize(Context, SourceLocation()); |
| } else { |
| TL.setHasBaseTypeAsWritten(true); |
| Visit(TL.getBaseLoc()); |
| } |
| |
| // Protocol qualifiers. |
| if (DS.getProtocolQualifiers()) { |
| assert(TL.getNumProtocols() > 0); |
| assert(TL.getNumProtocols() == DS.getNumProtocolQualifiers()); |
| TL.setLAngleLoc(DS.getProtocolLAngleLoc()); |
| TL.setRAngleLoc(DS.getSourceRange().getEnd()); |
| for (unsigned i = 0, e = DS.getNumProtocolQualifiers(); i != e; ++i) |
| TL.setProtocolLoc(i, DS.getProtocolLocs()[i]); |
| } else { |
| assert(TL.getNumProtocols() == 0); |
| TL.setLAngleLoc(SourceLocation()); |
| TL.setRAngleLoc(SourceLocation()); |
| } |
| } |
| void VisitObjCObjectPointerTypeLoc(ObjCObjectPointerTypeLoc TL) { |
| TL.setStarLoc(SourceLocation()); |
| Visit(TL.getPointeeLoc()); |
| } |
| void VisitTemplateSpecializationTypeLoc(TemplateSpecializationTypeLoc TL) { |
| TypeSourceInfo *TInfo = 0; |
| Sema::GetTypeFromParser(DS.getRepAsType(), &TInfo); |
| |
| // If we got no declarator info from previous Sema routines, |
| // just fill with the typespec loc. |
| if (!TInfo) { |
| TL.initialize(Context, DS.getTypeSpecTypeNameLoc()); |
| return; |
| } |
| |
| TypeLoc OldTL = TInfo->getTypeLoc(); |
| if (TInfo->getType()->getAs<ElaboratedType>()) { |
| ElaboratedTypeLoc ElabTL = cast<ElaboratedTypeLoc>(OldTL); |
| TemplateSpecializationTypeLoc NamedTL = |
| cast<TemplateSpecializationTypeLoc>(ElabTL.getNamedTypeLoc()); |
| TL.copy(NamedTL); |
| } |
| else |
| TL.copy(cast<TemplateSpecializationTypeLoc>(OldTL)); |
| } |
| void VisitTypeOfExprTypeLoc(TypeOfExprTypeLoc TL) { |
| assert(DS.getTypeSpecType() == DeclSpec::TST_typeofExpr); |
| TL.setTypeofLoc(DS.getTypeSpecTypeLoc()); |
| TL.setParensRange(DS.getTypeofParensRange()); |
| } |
| void VisitTypeOfTypeLoc(TypeOfTypeLoc TL) { |
| assert(DS.getTypeSpecType() == DeclSpec::TST_typeofType); |
| TL.setTypeofLoc(DS.getTypeSpecTypeLoc()); |
| TL.setParensRange(DS.getTypeofParensRange()); |
| assert(DS.getRepAsType()); |
| TypeSourceInfo *TInfo = 0; |
| Sema::GetTypeFromParser(DS.getRepAsType(), &TInfo); |
| TL.setUnderlyingTInfo(TInfo); |
| } |
| void VisitUnaryTransformTypeLoc(UnaryTransformTypeLoc TL) { |
| // FIXME: This holds only because we only have one unary transform. |
| assert(DS.getTypeSpecType() == DeclSpec::TST_underlyingType); |
| TL.setKWLoc(DS.getTypeSpecTypeLoc()); |
| TL.setParensRange(DS.getTypeofParensRange()); |
| assert(DS.getRepAsType()); |
| TypeSourceInfo *TInfo = 0; |
| Sema::GetTypeFromParser(DS.getRepAsType(), &TInfo); |
| TL.setUnderlyingTInfo(TInfo); |
| } |
| void VisitBuiltinTypeLoc(BuiltinTypeLoc TL) { |
| // By default, use the source location of the type specifier. |
| TL.setBuiltinLoc(DS.getTypeSpecTypeLoc()); |
| if (TL.needsExtraLocalData()) { |
| // Set info for the written builtin specifiers. |
| TL.getWrittenBuiltinSpecs() = DS.getWrittenBuiltinSpecs(); |
| // Try to have a meaningful source location. |
| if (TL.getWrittenSignSpec() != TSS_unspecified) |
| // Sign spec loc overrides the others (e.g., 'unsigned long'). |
| TL.setBuiltinLoc(DS.getTypeSpecSignLoc()); |
| else if (TL.getWrittenWidthSpec() != TSW_unspecified) |
| // Width spec loc overrides type spec loc (e.g., 'short int'). |
| TL.setBuiltinLoc(DS.getTypeSpecWidthLoc()); |
| } |
| } |
| void VisitElaboratedTypeLoc(ElaboratedTypeLoc TL) { |
| ElaboratedTypeKeyword Keyword |
| = TypeWithKeyword::getKeywordForTypeSpec(DS.getTypeSpecType()); |
| if (DS.getTypeSpecType() == TST_typename) { |
| TypeSourceInfo *TInfo = 0; |
| Sema::GetTypeFromParser(DS.getRepAsType(), &TInfo); |
| if (TInfo) { |
| TL.copy(cast<ElaboratedTypeLoc>(TInfo->getTypeLoc())); |
| return; |
| } |
| } |
| TL.setElaboratedKeywordLoc(Keyword != ETK_None |
| ? DS.getTypeSpecTypeLoc() |
| : SourceLocation()); |
| const CXXScopeSpec& SS = DS.getTypeSpecScope(); |
| TL.setQualifierLoc(SS.getWithLocInContext(Context)); |
| Visit(TL.getNextTypeLoc().getUnqualifiedLoc()); |
| } |
| void VisitDependentNameTypeLoc(DependentNameTypeLoc TL) { |
| assert(DS.getTypeSpecType() == TST_typename); |
| TypeSourceInfo *TInfo = 0; |
| Sema::GetTypeFromParser(DS.getRepAsType(), &TInfo); |
| assert(TInfo); |
| TL.copy(cast<DependentNameTypeLoc>(TInfo->getTypeLoc())); |
| } |
| void VisitDependentTemplateSpecializationTypeLoc( |
| DependentTemplateSpecializationTypeLoc TL) { |
| assert(DS.getTypeSpecType() == TST_typename); |
| TypeSourceInfo *TInfo = 0; |
| Sema::GetTypeFromParser(DS.getRepAsType(), &TInfo); |
| assert(TInfo); |
| TL.copy(cast<DependentTemplateSpecializationTypeLoc>( |
| TInfo->getTypeLoc())); |
| } |
| void VisitTagTypeLoc(TagTypeLoc TL) { |
| TL.setNameLoc(DS.getTypeSpecTypeNameLoc()); |
| } |
| void VisitAtomicTypeLoc(AtomicTypeLoc TL) { |
| TL.setKWLoc(DS.getTypeSpecTypeLoc()); |
| TL.setParensRange(DS.getTypeofParensRange()); |
| |
| TypeSourceInfo *TInfo = 0; |
| Sema::GetTypeFromParser(DS.getRepAsType(), &TInfo); |
| TL.getValueLoc().initializeFullCopy(TInfo->getTypeLoc()); |
| } |
| |
| void VisitTypeLoc(TypeLoc TL) { |
| // FIXME: add other typespec types and change this to an assert. |
| TL.initialize(Context, DS.getTypeSpecTypeLoc()); |
| } |
| }; |
| |
| class DeclaratorLocFiller : public TypeLocVisitor<DeclaratorLocFiller> { |
| ASTContext &Context; |
| const DeclaratorChunk &Chunk; |
| |
| public: |
| DeclaratorLocFiller(ASTContext &Context, const DeclaratorChunk &Chunk) |
| : Context(Context), Chunk(Chunk) {} |
| |
| void VisitQualifiedTypeLoc(QualifiedTypeLoc TL) { |
| llvm_unreachable("qualified type locs not expected here!"); |
| } |
| |
| void VisitAttributedTypeLoc(AttributedTypeLoc TL) { |
| fillAttributedTypeLoc(TL, Chunk.getAttrs()); |
| } |
| void VisitBlockPointerTypeLoc(BlockPointerTypeLoc TL) { |
| assert(Chunk.Kind == DeclaratorChunk::BlockPointer); |
| TL.setCaretLoc(Chunk.Loc); |
| } |
| void VisitPointerTypeLoc(PointerTypeLoc TL) { |
| assert(Chunk.Kind == DeclaratorChunk::Pointer); |
| TL.setStarLoc(Chunk.Loc); |
| } |
| void VisitObjCObjectPointerTypeLoc(ObjCObjectPointerTypeLoc TL) { |
| assert(Chunk.Kind == DeclaratorChunk::Pointer); |
| TL.setStarLoc(Chunk.Loc); |
| } |
| void VisitMemberPointerTypeLoc(MemberPointerTypeLoc TL) { |
| assert(Chunk.Kind == DeclaratorChunk::MemberPointer); |
| const CXXScopeSpec& SS = Chunk.Mem.Scope(); |
| NestedNameSpecifierLoc NNSLoc = SS.getWithLocInContext(Context); |
| |
| const Type* ClsTy = TL.getClass(); |
| QualType ClsQT = QualType(ClsTy, 0); |
| TypeSourceInfo *ClsTInfo = Context.CreateTypeSourceInfo(ClsQT, 0); |
| // Now copy source location info into the type loc component. |
| TypeLoc ClsTL = ClsTInfo->getTypeLoc(); |
| switch (NNSLoc.getNestedNameSpecifier()->getKind()) { |
| case NestedNameSpecifier::Identifier: |
| assert(isa<DependentNameType>(ClsTy) && "Unexpected TypeLoc"); |
| { |
| DependentNameTypeLoc DNTLoc = cast<DependentNameTypeLoc>(ClsTL); |
| DNTLoc.setElaboratedKeywordLoc(SourceLocation()); |
| DNTLoc.setQualifierLoc(NNSLoc.getPrefix()); |
| DNTLoc.setNameLoc(NNSLoc.getLocalBeginLoc()); |
| } |
| break; |
| |
| case NestedNameSpecifier::TypeSpec: |
| case NestedNameSpecifier::TypeSpecWithTemplate: |
| if (isa<ElaboratedType>(ClsTy)) { |
| ElaboratedTypeLoc ETLoc = *cast<ElaboratedTypeLoc>(&ClsTL); |
| ETLoc.setElaboratedKeywordLoc(SourceLocation()); |
| ETLoc.setQualifierLoc(NNSLoc.getPrefix()); |
| TypeLoc NamedTL = ETLoc.getNamedTypeLoc(); |
| NamedTL.initializeFullCopy(NNSLoc.getTypeLoc()); |
| } else { |
| ClsTL.initializeFullCopy(NNSLoc.getTypeLoc()); |
| } |
| break; |
| |
| case NestedNameSpecifier::Namespace: |
| case NestedNameSpecifier::NamespaceAlias: |
| case NestedNameSpecifier::Global: |
| llvm_unreachable("Nested-name-specifier must name a type"); |
| } |
| |
| // Finally fill in MemberPointerLocInfo fields. |
| TL.setStarLoc(Chunk.Loc); |
| TL.setClassTInfo(ClsTInfo); |
| } |
| void VisitLValueReferenceTypeLoc(LValueReferenceTypeLoc TL) { |
| assert(Chunk.Kind == DeclaratorChunk::Reference); |
| // 'Amp' is misleading: this might have been originally |
| /// spelled with AmpAmp. |
| TL.setAmpLoc(Chunk.Loc); |
| } |
| void VisitRValueReferenceTypeLoc(RValueReferenceTypeLoc TL) { |
| assert(Chunk.Kind == DeclaratorChunk::Reference); |
| assert(!Chunk.Ref.LValueRef); |
| TL.setAmpAmpLoc(Chunk.Loc); |
| } |
| void VisitArrayTypeLoc(ArrayTypeLoc TL) { |
| assert(Chunk.Kind == DeclaratorChunk::Array); |
| TL.setLBracketLoc(Chunk.Loc); |
| TL.setRBracketLoc(Chunk.EndLoc); |
| TL.setSizeExpr(static_cast<Expr*>(Chunk.Arr.NumElts)); |
| } |
| void VisitFunctionTypeLoc(FunctionTypeLoc TL) { |
| assert(Chunk.Kind == DeclaratorChunk::Function); |
| TL.setLocalRangeBegin(Chunk.Loc); |
| TL.setLocalRangeEnd(Chunk.EndLoc); |
| TL.setTrailingReturn(!!Chunk.Fun.TrailingReturnType); |
| |
| const DeclaratorChunk::FunctionTypeInfo &FTI = Chunk.Fun; |
| for (unsigned i = 0, e = TL.getNumArgs(), tpi = 0; i != e; ++i) { |
| ParmVarDecl *Param = cast<ParmVarDecl>(FTI.ArgInfo[i].Param); |
| TL.setArg(tpi++, Param); |
| } |
| // FIXME: exception specs |
| } |
| void VisitParenTypeLoc(ParenTypeLoc TL) { |
| assert(Chunk.Kind == DeclaratorChunk::Paren); |
| TL.setLParenLoc(Chunk.Loc); |
| TL.setRParenLoc(Chunk.EndLoc); |
| } |
| |
| void VisitTypeLoc(TypeLoc TL) { |
| llvm_unreachable("unsupported TypeLoc kind in declarator!"); |
| } |
| }; |
| } |
| |
| /// \brief Create and instantiate a TypeSourceInfo with type source information. |
| /// |
| /// \param T QualType referring to the type as written in source code. |
| /// |
| /// \param ReturnTypeInfo For declarators whose return type does not show |
| /// up in the normal place in the declaration specifiers (such as a C++ |
| /// conversion function), this pointer will refer to a type source information |
| /// for that return type. |
| TypeSourceInfo * |
| Sema::GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, |
| TypeSourceInfo *ReturnTypeInfo) { |
| TypeSourceInfo *TInfo = Context.CreateTypeSourceInfo(T); |
| UnqualTypeLoc CurrTL = TInfo->getTypeLoc().getUnqualifiedLoc(); |
| |
| // Handle parameter packs whose type is a pack expansion. |
| if (isa<PackExpansionType>(T)) { |
| cast<PackExpansionTypeLoc>(CurrTL).setEllipsisLoc(D.getEllipsisLoc()); |
| CurrTL = CurrTL.getNextTypeLoc().getUnqualifiedLoc(); |
| } |
| |
| for (unsigned i = 0, e = D.getNumTypeObjects(); i != e; ++i) { |
| while (isa<AttributedTypeLoc>(CurrTL)) { |
| AttributedTypeLoc TL = cast<AttributedTypeLoc>(CurrTL); |
| fillAttributedTypeLoc(TL, D.getTypeObject(i).getAttrs()); |
| CurrTL = TL.getNextTypeLoc().getUnqualifiedLoc(); |
| } |
| |
| DeclaratorLocFiller(Context, D.getTypeObject(i)).Visit(CurrTL); |
| CurrTL = CurrTL.getNextTypeLoc().getUnqualifiedLoc(); |
| } |
| |
| // If we have different source information for the return type, use |
| // that. This really only applies to C++ conversion functions. |
| if (ReturnTypeInfo) { |
| TypeLoc TL = ReturnTypeInfo->getTypeLoc(); |
| assert(TL.getFullDataSize() == CurrTL.getFullDataSize()); |
| memcpy(CurrTL.getOpaqueData(), TL.getOpaqueData(), TL.getFullDataSize()); |
| } else { |
| TypeSpecLocFiller(Context, D.getDeclSpec()).Visit(CurrTL); |
| } |
| |
| return TInfo; |
| } |
| |
| /// \brief Create a LocInfoType to hold the given QualType and TypeSourceInfo. |
| ParsedType Sema::CreateParsedType(QualType T, TypeSourceInfo *TInfo) { |
| // FIXME: LocInfoTypes are "transient", only needed for passing to/from Parser |
| // and Sema during declaration parsing. Try deallocating/caching them when |
| // it's appropriate, instead of allocating them and keeping them around. |
| LocInfoType *LocT = (LocInfoType*)BumpAlloc.Allocate(sizeof(LocInfoType), |
| TypeAlignment); |
| new (LocT) LocInfoType(T, TInfo); |
| assert(LocT->getTypeClass() != T->getTypeClass() && |
| "LocInfoType's TypeClass conflicts with an existing Type class"); |
| return ParsedType::make(QualType(LocT, 0)); |
| } |
| |
| void LocInfoType::getAsStringInternal(std::string &Str, |
| const PrintingPolicy &Policy) const { |
| llvm_unreachable("LocInfoType leaked into the type system; an opaque TypeTy*" |
| " was used directly instead of getting the QualType through" |
| " GetTypeFromParser"); |
| } |
| |
| TypeResult Sema::ActOnTypeName(Scope *S, Declarator &D) { |
| // C99 6.7.6: Type names have no identifier. This is already validated by |
| // the parser. |
| assert(D.getIdentifier() == 0 && "Type name should have no identifier!"); |
| |
| TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S); |
| QualType T = TInfo->getType(); |
| if (D.isInvalidType()) |
| return true; |
| |
| // Make sure there are no unused decl attributes on the declarator. |
| // We don't want to do this for ObjC parameters because we're going |
| // to apply them to the actual parameter declaration. |
| if (D.getContext() != Declarator::ObjCParameterContext) |
| checkUnusedDeclAttributes(D); |
| |
| if (getLangOptions().CPlusPlus) { |
| // Check that there are no default arguments (C++ only). |
| CheckExtraCXXDefaultArguments(D); |
| } |
| |
| return CreateParsedType(T, TInfo); |
| } |
| |
| ParsedType Sema::ActOnObjCInstanceType(SourceLocation Loc) { |
| QualType T = Context.getObjCInstanceType(); |
| TypeSourceInfo *TInfo = Context.getTrivialTypeSourceInfo(T, Loc); |
| return CreateParsedType(T, TInfo); |
| } |
| |
| |
| //===----------------------------------------------------------------------===// |
| // Type Attribute Processing |
| //===----------------------------------------------------------------------===// |
| |
| /// HandleAddressSpaceTypeAttribute - Process an address_space attribute on the |
| /// specified type. The attribute contains 1 argument, the id of the address |
| /// space for the type. |
| static void HandleAddressSpaceTypeAttribute(QualType &Type, |
| const AttributeList &Attr, Sema &S){ |
| |
| // If this type is already address space qualified, reject it. |
| // ISO/IEC TR 18037 S5.3 (amending C99 6.7.3): "No type shall be qualified by |
| // qualifiers for two or more different address spaces." |
| if (Type.getAddressSpace()) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_address_multiple_qualifiers); |
| Attr.setInvalid(); |
| return; |
| } |
| |
| // ISO/IEC TR 18037 S5.3 (amending C99 6.7.3): "A function type shall not be |
| // qualified by an address-space qualifier." |
| if (Type->isFunctionType()) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_address_function_type); |
| Attr.setInvalid(); |
| return; |
| } |
| |
| // Check the attribute arguments. |
| if (Attr.getNumArgs() != 1) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1; |
| Attr.setInvalid(); |
| return; |
| } |
| Expr *ASArgExpr = static_cast<Expr *>(Attr.getArg(0)); |
| llvm::APSInt addrSpace(32); |
| if (ASArgExpr->isTypeDependent() || ASArgExpr->isValueDependent() || |
| !ASArgExpr->isIntegerConstantExpr(addrSpace, S.Context)) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_address_space_not_int) |
| << ASArgExpr->getSourceRange(); |
| Attr.setInvalid(); |
| return; |
| } |
| |
| // Bounds checking. |
| if (addrSpace.isSigned()) { |
| if (addrSpace.isNegative()) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_address_space_negative) |
| << ASArgExpr->getSourceRange(); |
| Attr.setInvalid(); |
| return; |
| } |
| addrSpace.setIsSigned(false); |
| } |
| llvm::APSInt max(addrSpace.getBitWidth()); |
| max = Qualifiers::MaxAddressSpace; |
| if (addrSpace > max) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_address_space_too_high) |
| << Qualifiers::MaxAddressSpace << ASArgExpr->getSourceRange(); |
| Attr.setInvalid(); |
| return; |
| } |
| |
| unsigned ASIdx = static_cast<unsigned>(addrSpace.getZExtValue()); |
| Type = S.Context.getAddrSpaceQualType(Type, ASIdx); |
| } |
| |
| /// Does this type have a "direct" ownership qualifier? That is, |
| /// is it written like "__strong id", as opposed to something like |
| /// "typeof(foo)", where that happens to be strong? |
| static bool hasDirectOwnershipQualifier(QualType type) { |
| // Fast path: no qualifier at all. |
| assert(type.getQualifiers().hasObjCLifetime()); |
| |
| while (true) { |
| // __strong id |
| if (const AttributedType *attr = dyn_cast<AttributedType>(type)) { |
| if (attr->getAttrKind() == AttributedType::attr_objc_ownership) |
| return true; |
| |
| type = attr->getModifiedType(); |
| |
| // X *__strong (...) |
| } else if (const ParenType *paren = dyn_cast<ParenType>(type)) { |
| type = paren->getInnerType(); |
| |
| // That's it for things we want to complain about. In particular, |
| // we do not want to look through typedefs, typeof(expr), |
| // typeof(type), or any other way that the type is somehow |
| // abstracted. |
| } else { |
| |
| return false; |
| } |
| } |
| } |
| |
| /// handleObjCOwnershipTypeAttr - Process an objc_ownership |
| /// attribute on the specified type. |
| /// |
| /// Returns 'true' if the attribute was handled. |
| static bool handleObjCOwnershipTypeAttr(TypeProcessingState &state, |
| AttributeList &attr, |
| QualType &type) { |
| bool NonObjCPointer = false; |
| |
| if (!type->isDependentType()) { |
| if (const PointerType *ptr = type->getAs<PointerType>()) { |
| QualType pointee = ptr->getPointeeType(); |
| if (pointee->isObjCRetainableType() || pointee->isPointerType()) |
| return false; |
| // It is important not to lose the source info that there was an attribute |
| // applied to non-objc pointer. We will create an attributed type but |
| // its type will be the same as the original type. |
| NonObjCPointer = true; |
| } else if (!type->isObjCRetainableType()) { |
| return false; |
| } |
| } |
| |
| Sema &S = state.getSema(); |
| SourceLocation AttrLoc = attr.getLoc(); |
| if (AttrLoc.isMacroID()) |
| AttrLoc = S.getSourceManager().getImmediateExpansionRange(AttrLoc).first; |
| |
| if (!attr.getParameterName()) { |
| S.Diag(AttrLoc, diag::err_attribute_argument_n_not_string) |
| << "objc_ownership" << 1; |
| attr.setInvalid(); |
| return true; |
| } |
| |
| // Consume lifetime attributes without further comment outside of |
| // ARC mode. |
| if (!S.getLangOptions().ObjCAutoRefCount) |
| return true; |
| |
| Qualifiers::ObjCLifetime lifetime; |
| if (attr.getParameterName()->isStr("none")) |
| lifetime = Qualifiers::OCL_ExplicitNone; |
| else if (attr.getParameterName()->isStr("strong")) |
| lifetime = Qualifiers::OCL_Strong; |
| else if (attr.getParameterName()->isStr("weak")) |
| lifetime = Qualifiers::OCL_Weak; |
| else if (attr.getParameterName()->isStr("autoreleasing")) |
| lifetime = Qualifiers::OCL_Autoreleasing; |
| else { |
| S.Diag(AttrLoc, diag::warn_attribute_type_not_supported) |
| << "objc_ownership" << attr.getParameterName(); |
| attr.setInvalid(); |
| return true; |
| } |
| |
| SplitQualType underlyingType = type.split(); |
| |
| // Check for redundant/conflicting ownership qualifiers. |
| if (Qualifiers::ObjCLifetime previousLifetime |
| = type.getQualifiers().getObjCLifetime()) { |
| // If it's written directly, that's an error. |
| if (hasDirectOwnershipQualifier(type)) { |
| S.Diag(AttrLoc, diag::err_attr_objc_ownership_redundant) |
| << type; |
| return true; |
| } |
| |
| // Otherwise, if the qualifiers actually conflict, pull sugar off |
| // until we reach a type that is directly qualified. |
| if (previousLifetime != lifetime) { |
| // This should always terminate: the canonical type is |
| // qualified, so some bit of sugar must be hiding it. |
| while (!underlyingType.Quals.hasObjCLifetime()) { |
| underlyingType = underlyingType.getSingleStepDesugaredType(); |
| } |
| underlyingType.Quals.removeObjCLifetime(); |
| } |
| } |
| |
| underlyingType.Quals.addObjCLifetime(lifetime); |
| |
| if (NonObjCPointer) { |
| StringRef name = attr.getName()->getName(); |
| switch (lifetime) { |
| case Qualifiers::OCL_None: |
| case Qualifiers::OCL_ExplicitNone: |
| break; |
| case Qualifiers::OCL_Strong: name = "__strong"; break; |
| case Qualifiers::OCL_Weak: name = "__weak"; break; |
| case Qualifiers::OCL_Autoreleasing: name = "__autoreleasing"; break; |
| } |
| S.Diag(AttrLoc, diag::warn_objc_object_attribute_wrong_type) |
| << name << type; |
| } |
| |
| QualType origType = type; |
| if (!NonObjCPointer) |
| type = S.Context.getQualifiedType(underlyingType); |
| |
| // If we have a valid source location for the attribute, use an |
| // AttributedType instead. |
| if (AttrLoc.isValid()) |
| type = S.Context.getAttributedType(AttributedType::attr_objc_ownership, |
| origType, type); |
| |
| // Forbid __weak if the runtime doesn't support it. |
| if (lifetime == Qualifiers::OCL_Weak && |
| !S.getLangOptions().ObjCRuntimeHasWeak && !NonObjCPointer) { |
| |
| // Actually, delay this until we know what we're parsing. |
| if (S.DelayedDiagnostics.shouldDelayDiagnostics()) { |
| S.DelayedDiagnostics.add( |
| sema::DelayedDiagnostic::makeForbiddenType( |
| S.getSourceManager().getExpansionLoc(AttrLoc), |
| diag::err_arc_weak_no_runtime, type, /*ignored*/ 0)); |
| } else { |
| S.Diag(AttrLoc, diag::err_arc_weak_no_runtime); |
| } |
| |
| attr.setInvalid(); |
| return true; |
| } |
| |
| // Forbid __weak for class objects marked as |
| // objc_arc_weak_reference_unavailable |
| if (lifetime == Qualifiers::OCL_Weak) { |
| QualType T = type; |
| while (const PointerType *ptr = T->getAs<PointerType>()) |
| T = ptr->getPointeeType(); |
| if (const ObjCObjectPointerType *ObjT = T->getAs<ObjCObjectPointerType>()) { |
| ObjCInterfaceDecl *Class = ObjT->getInterfaceDecl(); |
| if (Class->isArcWeakrefUnavailable()) { |
| S.Diag(AttrLoc, diag::err_arc_unsupported_weak_class); |
| S.Diag(ObjT->getInterfaceDecl()->getLocation(), |
| diag::note_class_declared); |
| } |
| } |
| } |
| |
| return true; |
| } |
| |
| /// handleObjCGCTypeAttr - Process the __attribute__((objc_gc)) type |
| /// attribute on the specified type. Returns true to indicate that |
| /// the attribute was handled, false to indicate that the type does |
| /// not permit the attribute. |
| static bool handleObjCGCTypeAttr(TypeProcessingState &state, |
| AttributeList &attr, |
| QualType &type) { |
| Sema &S = state.getSema(); |
| |
| // Delay if this isn't some kind of pointer. |
| if (!type->isPointerType() && |
| !type->isObjCObjectPointerType() && |
| !type->isBlockPointerType()) |
| return false; |
| |
| if (type.getObjCGCAttr() != Qualifiers::GCNone) { |
| S.Diag(attr.getLoc(), diag::err_attribute_multiple_objc_gc); |
| attr.setInvalid(); |
| return true; |
| } |
| |
| // Check the attribute arguments. |
| if (!attr.getParameterName()) { |
| S.Diag(attr.getLoc(), diag::err_attribute_argument_n_not_string) |
| << "objc_gc" << 1; |
| attr.setInvalid(); |
| return true; |
| } |
| Qualifiers::GC GCAttr; |
| if (attr.getNumArgs() != 0) { |
| S.Diag(attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1; |
| attr.setInvalid(); |
| return true; |
| } |
| if (attr.getParameterName()->isStr("weak")) |
| GCAttr = Qualifiers::Weak; |
| else if (attr.getParameterName()->isStr("strong")) |
| GCAttr = Qualifiers::Strong; |
| else { |
| S.Diag(attr.getLoc(), diag::warn_attribute_type_not_supported) |
| << "objc_gc" << attr.getParameterName(); |
| attr.setInvalid(); |
| return true; |
| } |
| |
| QualType origType = type; |
| type = S.Context.getObjCGCQualType(origType, GCAttr); |
| |
| // Make an attributed type to preserve the source information. |
| if (attr.getLoc().isValid()) |
| type = S.Context.getAttributedType(AttributedType::attr_objc_gc, |
| origType, type); |
| |
| return true; |
| } |
| |
| namespace { |
| /// A helper class to unwrap a type down to a function for the |
| /// purposes of applying attributes there. |
| /// |
| /// Use: |
| /// FunctionTypeUnwrapper unwrapped(SemaRef, T); |
| /// if (unwrapped.isFunctionType()) { |
| /// const FunctionType *fn = unwrapped.get(); |
| /// // change fn somehow |
| /// T = unwrapped.wrap(fn); |
| /// } |
| struct FunctionTypeUnwrapper { |
| enum WrapKind { |
| Desugar, |
| Parens, |
| Pointer, |
| BlockPointer, |
| Reference, |
| MemberPointer |
| }; |
| |
| QualType Original; |
| const FunctionType *Fn; |
| SmallVector<unsigned char /*WrapKind*/, 8> Stack; |
| |
| FunctionTypeUnwrapper(Sema &S, QualType T) : Original(T) { |
| while (true) { |
| const Type *Ty = T.getTypePtr(); |
| if (isa<FunctionType>(Ty)) { |
| Fn = cast<FunctionType>(Ty); |
| return; |
| } else if (isa<ParenType>(Ty)) { |
| T = cast<ParenType>(Ty)->getInnerType(); |
| Stack.push_back(Parens); |
| } else if (isa<PointerType>(Ty)) { |
| T = cast<PointerType>(Ty)->getPointeeType(); |
| Stack.push_back(Pointer); |
| } else if (isa<BlockPointerType>(Ty)) { |
| T = cast<BlockPointerType>(Ty)->getPointeeType(); |
| Stack.push_back(BlockPointer); |
| } else if (isa<MemberPointerType>(Ty)) { |
| T = cast<MemberPointerType>(Ty)->getPointeeType(); |
| Stack.push_back(MemberPointer); |
| } else if (isa<ReferenceType>(Ty)) { |
| T = cast<ReferenceType>(Ty)->getPointeeType(); |
| Stack.push_back(Reference); |
| } else { |
| const Type *DTy = Ty->getUnqualifiedDesugaredType(); |
| if (Ty == DTy) { |
| Fn = 0; |
| return; |
| } |
| |
| T = QualType(DTy, 0); |
| Stack.push_back(Desugar); |
| } |
| } |
| } |
| |
| bool isFunctionType() const { return (Fn != 0); } |
| const FunctionType *get() const { return Fn; } |
| |
| QualType wrap(Sema &S, const FunctionType *New) { |
| // If T wasn't modified from the unwrapped type, do nothing. |
| if (New == get()) return Original; |
| |
| Fn = New; |
| return wrap(S.Context, Original, 0); |
| } |
| |
| private: |
| QualType wrap(ASTContext &C, QualType Old, unsigned I) { |
| if (I == Stack.size()) |
| return C.getQualifiedType(Fn, Old.getQualifiers()); |
| |
| // Build up the inner type, applying the qualifiers from the old |
| // type to the new type. |
| SplitQualType SplitOld = Old.split(); |
| |
| // As a special case, tail-recurse if there are no qualifiers. |
| if (SplitOld.Quals.empty()) |
| return wrap(C, SplitOld.Ty, I); |
| return C.getQualifiedType(wrap(C, SplitOld.Ty, I), SplitOld.Quals); |
| } |
| |
| QualType wrap(ASTContext &C, const Type *Old, unsigned I) { |
| if (I == Stack.size()) return QualType(Fn, 0); |
| |
| switch (static_cast<WrapKind>(Stack[I++])) { |
| case Desugar: |
| // This is the point at which we potentially lose source |
| // information. |
| return wrap(C, Old->getUnqualifiedDesugaredType(), I); |
| |
| case Parens: { |
| QualType New = wrap(C, cast<ParenType>(Old)->getInnerType(), I); |
| return C.getParenType(New); |
| } |
| |
| case Pointer: { |
| QualType New = wrap(C, cast<PointerType>(Old)->getPointeeType(), I); |
| return C.getPointerType(New); |
| } |
| |
| case BlockPointer: { |
| QualType New = wrap(C, cast<BlockPointerType>(Old)->getPointeeType(),I); |
| return C.getBlockPointerType(New); |
| } |
| |
| case MemberPointer: { |
| const MemberPointerType *OldMPT = cast<MemberPointerType>(Old); |
| QualType New = wrap(C, OldMPT->getPointeeType(), I); |
| return C.getMemberPointerType(New, OldMPT->getClass()); |
| } |
| |
| case Reference: { |
| const ReferenceType *OldRef = cast<ReferenceType>(Old); |
| QualType New = wrap(C, OldRef->getPointeeType(), I); |
| if (isa<LValueReferenceType>(OldRef)) |
| return C.getLValueReferenceType(New, OldRef->isSpelledAsLValue()); |
| else |
| return C.getRValueReferenceType(New); |
| } |
| } |
| |
| llvm_unreachable("unknown wrapping kind"); |
| } |
| }; |
| } |
| |
| /// Process an individual function attribute. Returns true to |
| /// indicate that the attribute was handled, false if it wasn't. |
| static bool handleFunctionTypeAttr(TypeProcessingState &state, |
| AttributeList &attr, |
| QualType &type) { |
| Sema &S = state.getSema(); |
| |
| FunctionTypeUnwrapper unwrapped(S, type); |
| |
| if (attr.getKind() == AttributeList::AT_noreturn) { |
| if (S.CheckNoReturnAttr(attr)) |
| return true; |
| |
| // Delay if this is not a function type. |
| if (!unwrapped.isFunctionType()) |
| return false; |
| |
| // Otherwise we can process right away. |
| FunctionType::ExtInfo EI = unwrapped.get()->getExtInfo().withNoReturn(true); |
| type = unwrapped.wrap(S, S.Context.adjustFunctionType(unwrapped.get(), EI)); |
| return true; |
| } |
| |
| // ns_returns_retained is not always a type attribute, but if we got |
| // here, we're treating it as one right now. |
| if (attr.getKind() == AttributeList::AT_ns_returns_retained) { |
| assert(S.getLangOptions().ObjCAutoRefCount && |
| "ns_returns_retained treated as type attribute in non-ARC"); |
| if (attr.getNumArgs()) return true; |
| |
| // Delay if this is not a function type. |
| if (!unwrapped.isFunctionType()) |
| return false; |
| |
| FunctionType::ExtInfo EI |
| = unwrapped.get()->getExtInfo().withProducesResult(true); |
| type = unwrapped.wrap(S, S.Context.adjustFunctionType(unwrapped.get(), EI)); |
| return true; |
| } |
| |
| if (attr.getKind() == AttributeList::AT_regparm) { |
| unsigned value; |
| if (S.CheckRegparmAttr(attr, value)) |
| return true; |
| |
| // Delay if this is not a function type. |
| if (!unwrapped.isFunctionType()) |
| return false; |
| |
| // Diagnose regparm with fastcall. |
| const FunctionType *fn = unwrapped.get(); |
| CallingConv CC = fn->getCallConv(); |
| if (CC == CC_X86FastCall) { |
| S.Diag(attr.getLoc(), diag::err_attributes_are_not_compatible) |
| << FunctionType::getNameForCallConv(CC) |
| << "regparm"; |
| attr.setInvalid(); |
| return true; |
| } |
| |
| FunctionType::ExtInfo EI = |
| unwrapped.get()->getExtInfo().withRegParm(value); |
| type = unwrapped.wrap(S, S.Context.adjustFunctionType(unwrapped.get(), EI)); |
| return true; |
| } |
| |
| // Otherwise, a calling convention. |
| CallingConv CC; |
| if (S.CheckCallingConvAttr(attr, CC)) |
| return true; |
| |
| // Delay if the type didn't work out to a function. |
| if (!unwrapped.isFunctionType()) return false; |
| |
| const FunctionType *fn = unwrapped.get(); |
| CallingConv CCOld = fn->getCallConv(); |
| if (S.Context.getCanonicalCallConv(CC) == |
| S.Context.getCanonicalCallConv(CCOld)) { |
| FunctionType::ExtInfo EI= unwrapped.get()->getExtInfo().withCallingConv(CC); |
| type = unwrapped.wrap(S, S.Context.adjustFunctionType(unwrapped.get(), EI)); |
| return true; |
| } |
| |
| if (CCOld != (S.LangOpts.MRTD ? CC_X86StdCall : CC_Default)) { |
| // Should we diagnose reapplications of the same convention? |
| S.Diag(attr.getLoc(), diag::err_attributes_are_not_compatible) |
| << FunctionType::getNameForCallConv(CC) |
| << FunctionType::getNameForCallConv(CCOld); |
| attr.setInvalid(); |
| return true; |
| } |
| |
| // Diagnose the use of X86 fastcall on varargs or unprototyped functions. |
| if (CC == CC_X86FastCall) { |
| if (isa<FunctionNoProtoType>(fn)) { |
| S.Diag(attr.getLoc(), diag::err_cconv_knr) |
| << FunctionType::getNameForCallConv(CC); |
| attr.setInvalid(); |
| return true; |
| } |
| |
| const FunctionProtoType *FnP = cast<FunctionProtoType>(fn); |
| if (FnP->isVariadic()) { |
| S.Diag(attr.getLoc(), diag::err_cconv_varargs) |
| << FunctionType::getNameForCallConv(CC); |
| attr.setInvalid(); |
| return true; |
| } |
| |
| // Also diagnose fastcall with regparm. |
| if (fn->getHasRegParm()) { |
| S.Diag(attr.getLoc(), diag::err_attributes_are_not_compatible) |
| << "regparm" |
| << FunctionType::getNameForCallConv(CC); |
| attr.setInvalid(); |
| return true; |
| } |
| } |
| |
| FunctionType::ExtInfo EI = unwrapped.get()->getExtInfo().withCallingConv(CC); |
| type = unwrapped.wrap(S, S.Context.adjustFunctionType(unwrapped.get(), EI)); |
| return true; |
| } |
| |
| /// Handle OpenCL image access qualifiers: read_only, write_only, read_write |
| static void HandleOpenCLImageAccessAttribute(QualType& CurType, |
| const AttributeList &Attr, |
| Sema &S) { |
| // Check the attribute arguments. |
| if (Attr.getNumArgs() != 1) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1; |
| Attr.setInvalid(); |
| return; |
| } |
| Expr *sizeExpr = static_cast<Expr *>(Attr.getArg(0)); |
| llvm::APSInt arg(32); |
| if (sizeExpr->isTypeDependent() || sizeExpr->isValueDependent() || |
| !sizeExpr->isIntegerConstantExpr(arg, S.Context)) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_argument_not_int) |
| << "opencl_image_access" << sizeExpr->getSourceRange(); |
| Attr.setInvalid(); |
| return; |
| } |
| unsigned iarg = static_cast<unsigned>(arg.getZExtValue()); |
| switch (iarg) { |
| case CLIA_read_only: |
| case CLIA_write_only: |
| case CLIA_read_write: |
| // Implemented in a separate patch |
| break; |
| default: |
| // Implemented in a separate patch |
| S.Diag(Attr.getLoc(), diag::err_attribute_invalid_size) |
| << sizeExpr->getSourceRange(); |
| Attr.setInvalid(); |
| break; |
| } |
| } |
| |
| /// HandleVectorSizeAttribute - this attribute is only applicable to integral |
| /// and float scalars, although arrays, pointers, and function return values are |
| /// allowed in conjunction with this construct. Aggregates with this attribute |
| /// are invalid, even if they are of the same size as a corresponding scalar. |
| /// The raw attribute should contain precisely 1 argument, the vector size for |
| /// the variable, measured in bytes. If curType and rawAttr are well formed, |
| /// this routine will return a new vector type. |
| static void HandleVectorSizeAttr(QualType& CurType, const AttributeList &Attr, |
| Sema &S) { |
| // Check the attribute arguments. |
| if (Attr.getNumArgs() != 1) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1; |
| Attr.setInvalid(); |
| return; |
| } |
| Expr *sizeExpr = static_cast<Expr *>(Attr.getArg(0)); |
| llvm::APSInt vecSize(32); |
| if (sizeExpr->isTypeDependent() || sizeExpr->isValueDependent() || |
| !sizeExpr->isIntegerConstantExpr(vecSize, S.Context)) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_argument_not_int) |
| << "vector_size" << sizeExpr->getSourceRange(); |
| Attr.setInvalid(); |
| return; |
| } |
| // the base type must be integer or float, and can't already be a vector. |
| if (!CurType->isIntegerType() && !CurType->isRealFloatingType()) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_invalid_vector_type) << CurType; |
| Attr.setInvalid(); |
| return; |
| } |
| unsigned typeSize = static_cast<unsigned>(S.Context.getTypeSize(CurType)); |
| // vecSize is specified in bytes - convert to bits. |
| unsigned vectorSize = static_cast<unsigned>(vecSize.getZExtValue() * 8); |
| |
| // the vector size needs to be an integral multiple of the type size. |
| if (vectorSize % typeSize) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_invalid_size) |
| << sizeExpr->getSourceRange(); |
| Attr.setInvalid(); |
| return; |
| } |
| if (vectorSize == 0) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_zero_size) |
| << sizeExpr->getSourceRange(); |
| Attr.setInvalid(); |
| return; |
| } |
| |
| // Success! Instantiate the vector type, the number of elements is > 0, and |
| // not required to be a power of 2, unlike GCC. |
| CurType = S.Context.getVectorType(CurType, vectorSize/typeSize, |
| VectorType::GenericVector); |
| } |
| |
| /// \brief Process the OpenCL-like ext_vector_type attribute when it occurs on |
| /// a type. |
| static void HandleExtVectorTypeAttr(QualType &CurType, |
| const AttributeList &Attr, |
| Sema &S) { |
| Expr *sizeExpr; |
| |
| // Special case where the argument is a template id. |
| if (Attr.getParameterName()) { |
| CXXScopeSpec SS; |
| SourceLocation TemplateKWLoc; |
| UnqualifiedId id; |
| id.setIdentifier(Attr.getParameterName(), Attr.getLoc()); |
| |
| ExprResult Size = S.ActOnIdExpression(S.getCurScope(), SS, TemplateKWLoc, |
| id, false, false); |
| if (Size.isInvalid()) |
| return; |
| |
| sizeExpr = Size.get(); |
| } else { |
| // check the attribute arguments. |
| if (Attr.getNumArgs() != 1) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1; |
| return; |
| } |
| sizeExpr = Attr.getArg(0); |
| } |
| |
| // Create the vector type. |
| QualType T = S.BuildExtVectorType(CurType, sizeExpr, Attr.getLoc()); |
| if (!T.isNull()) |
| CurType = T; |
| } |
| |
| /// HandleNeonVectorTypeAttr - The "neon_vector_type" and |
| /// "neon_polyvector_type" attributes are used to create vector types that |
| /// are mangled according to ARM's ABI. Otherwise, these types are identical |
| /// to those created with the "vector_size" attribute. Unlike "vector_size" |
| /// the argument to these Neon attributes is the number of vector elements, |
| /// not the vector size in bytes. The vector width and element type must |
| /// match one of the standard Neon vector types. |
| static void HandleNeonVectorTypeAttr(QualType& CurType, |
| const AttributeList &Attr, Sema &S, |
| VectorType::VectorKind VecKind, |
| const char *AttrName) { |
| // Check the attribute arguments. |
| if (Attr.getNumArgs() != 1) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1; |
| Attr.setInvalid(); |
| return; |
| } |
| // The number of elements must be an ICE. |
| Expr *numEltsExpr = static_cast<Expr *>(Attr.getArg(0)); |
| llvm::APSInt numEltsInt(32); |
| if (numEltsExpr->isTypeDependent() || numEltsExpr->isValueDependent() || |
| !numEltsExpr->isIntegerConstantExpr(numEltsInt, S.Context)) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_argument_not_int) |
| << AttrName << numEltsExpr->getSourceRange(); |
| Attr.setInvalid(); |
| return; |
| } |
| // Only certain element types are supported for Neon vectors. |
| const BuiltinType* BTy = CurType->getAs<BuiltinType>(); |
| if (!BTy || |
| (VecKind == VectorType::NeonPolyVector && |
| BTy->getKind() != BuiltinType::SChar && |
| BTy->getKind() != BuiltinType::Short) || |
| (BTy->getKind() != BuiltinType::SChar && |
| BTy->getKind() != BuiltinType::UChar && |
| BTy->getKind() != BuiltinType::Short && |
| BTy->getKind() != BuiltinType::UShort && |
| BTy->getKind() != BuiltinType::Int && |
| BTy->getKind() != BuiltinType::UInt && |
| BTy->getKind() != BuiltinType::LongLong && |
| BTy->getKind() != BuiltinType::ULongLong && |
| BTy->getKind() != BuiltinType::Float)) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_invalid_vector_type) <<CurType; |
| Attr.setInvalid(); |
| return; |
| } |
| // The total size of the vector must be 64 or 128 bits. |
| unsigned typeSize = static_cast<unsigned>(S.Context.getTypeSize(CurType)); |
| unsigned numElts = static_cast<unsigned>(numEltsInt.getZExtValue()); |
| unsigned vecSize = typeSize * numElts; |
| if (vecSize != 64 && vecSize != 128) { |
| S.Diag(Attr.getLoc(), diag::err_attribute_bad_neon_vector_size) << CurType; |
| Attr.setInvalid(); |
| return; |
| } |
| |
| CurType = S.Context.getVectorType(CurType, numElts, VecKind); |
| } |
| |
| static void processTypeAttrs(TypeProcessingState &state, QualType &type, |
| bool isDeclSpec, AttributeList *attrs) { |
| // Scan through and apply attributes to this type where it makes sense. Some |
| // attributes (such as __address_space__, __vector_size__, etc) apply to the |
| // type, but others can be present in the type specifiers even though they |
| // apply to the decl. Here we apply type attributes and ignore the rest. |
| |
| AttributeList *next; |
| do { |
| AttributeList &attr = *attrs; |
| next = attr.getNext(); |
| |
| // Skip attributes that were marked to be invalid. |
| if (attr.isInvalid()) |
| continue; |
| |
| // If this is an attribute we can handle, do so now, |
| // otherwise, add it to the FnAttrs list for rechaining. |
| switch (attr.getKind()) { |
| default: break; |
| |
| case AttributeList::AT_may_alias: |
| // FIXME: This attribute needs to actually be handled, but if we ignore |
| // it it breaks large amounts of Linux software. |
| attr.setUsedAsTypeAttr(); |
| break; |
| case AttributeList::AT_address_space: |
| HandleAddressSpaceTypeAttribute(type, attr, state.getSema()); |
| attr.setUsedAsTypeAttr(); |
| break; |
| OBJC_POINTER_TYPE_ATTRS_CASELIST: |
| if (!handleObjCPointerTypeAttr(state, attr, type)) |
| distributeObjCPointerTypeAttr(state, attr, type); |
| attr.setUsedAsTypeAttr(); |
| break; |
| case AttributeList::AT_vector_size: |
| HandleVectorSizeAttr(type, attr, state.getSema()); |
| attr.setUsedAsTypeAttr(); |
| break; |
| case AttributeList::AT_ext_vector_type: |
| if (state.getDeclarator().getDeclSpec().getStorageClassSpec() |
| != DeclSpec::SCS_typedef) |
| HandleExtVectorTypeAttr(type, attr, state.getSema()); |
| attr.setUsedAsTypeAttr(); |
| break; |
| case AttributeList::AT_neon_vector_type: |
| HandleNeonVectorTypeAttr(type, attr, state.getSema(), |
| VectorType::NeonVector, "neon_vector_type"); |
| attr.setUsedAsTypeAttr(); |
| break; |
| case AttributeList::AT_neon_polyvector_type: |
| HandleNeonVectorTypeAttr(type, attr, state.getSema(), |
| VectorType::NeonPolyVector, |
| "neon_polyvector_type"); |
| attr.setUsedAsTypeAttr(); |
| break; |
| case AttributeList::AT_opencl_image_access: |
| HandleOpenCLImageAccessAttribute(type, attr, state.getSema()); |
| attr.setUsedAsTypeAttr(); |
| break; |
| |
| case AttributeList::AT_ns_returns_retained: |
| if (!state.getSema().getLangOptions().ObjCAutoRefCount) |
| break; |
| // fallthrough into the function attrs |
| |
| FUNCTION_TYPE_ATTRS_CASELIST: |
| attr.setUsedAsTypeAttr(); |
| |
| // Never process function type attributes as part of the |
| // declaration-specifiers. |
| if (isDeclSpec) |
| distributeFunctionTypeAttrFromDeclSpec(state, attr, type); |
| |
| // Otherwise, handle the possible delays. |
| else if (!handleFunctionTypeAttr(state, attr, type)) |
| distributeFunctionTypeAttr(state, attr, type); |
| break; |
| } |
| } while ((attrs = next)); |
| } |
| |
| /// \brief Ensure that the type of the given expression is complete. |
| /// |
| /// This routine checks whether the expression \p E has a complete type. If the |
| /// expression refers to an instantiable construct, that instantiation is |
| /// performed as needed to complete its type. Furthermore |
| /// Sema::RequireCompleteType is called for the expression's type (or in the |
| /// case of a reference type, the referred-to type). |
| /// |
| /// \param E The expression whose type is required to be complete. |
| /// \param PD The partial diagnostic that will be printed out if the type cannot |
| /// be completed. |
| /// |
| /// \returns \c true if the type of \p E is incomplete and diagnosed, \c false |
| /// otherwise. |
| bool Sema::RequireCompleteExprType(Expr *E, const PartialDiagnostic &PD, |
| std::pair<SourceLocation, |
| PartialDiagnostic> Note) { |
| QualType T = E->getType(); |
| |
| // Fast path the case where the type is already complete. |
| if (!T->isIncompleteType()) |
| return false; |
| |
| // Incomplete array types may be completed by the initializer attached to |
| // their definitions. For static data members of class templates we need to |
| // instantiate the definition to get this initializer and complete the type. |
| if (T->isIncompleteArrayType()) { |
| if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E->IgnoreParens())) { |
| if (VarDecl *Var = dyn_cast<VarDecl>(DRE->getDecl())) { |
| if (Var->isStaticDataMember() && |
| Var->getInstantiatedFromStaticDataMember()) { |
| |
| MemberSpecializationInfo *MSInfo = Var->getMemberSpecializationInfo(); |
| assert(MSInfo && "Missing member specialization information?"); |
| if (MSInfo->getTemplateSpecializationKind() |
| != TSK_ExplicitSpecialization) { |
| // If we don't already have a point of instantiation, this is it. |
| if (MSInfo->getPointOfInstantiation().isInvalid()) { |
| MSInfo->setPointOfInstantiation(E->getLocStart()); |
| |
| // This is a modification of an existing AST node. Notify |
| // listeners. |
| if (ASTMutationListener *L = getASTMutationListener()) |
| L->StaticDataMemberInstantiated(Var); |
| } |
| |
| InstantiateStaticDataMemberDefinition(E->getExprLoc(), Var); |
| |
| // Update the type to the newly instantiated definition's type both |
| // here and within the expression. |
| if (VarDecl *Def = Var->getDefinition()) { |
| DRE->setDecl(Def); |
| T = Def->getType(); |
| DRE->setType(T); |
| E->setType(T); |
| } |
| } |
| |
| // We still go on to try to complete the type independently, as it |
| // may also require instantiations or diagnostics if it remains |
| // incomplete. |
| } |
| } |
| } |
| } |
| |
| // FIXME: Are there other cases which require instantiating something other |
| // than the type to complete the type of an expression? |
| |
| // Look through reference types and complete the referred type. |
| if (const ReferenceType *Ref = T->getAs<ReferenceType>()) |
| T = Ref->getPointeeType(); |
| |
| return RequireCompleteType(E->getExprLoc(), T, PD, Note); |
| } |
| |
| /// @brief Ensure that the type T is a complete type. |
| /// |
| /// This routine checks whether the type @p T is complete in any |
| /// context where a complete type is required. If @p T is a complete |
| /// type, returns false. If @p T is a class template specialization, |
| /// this routine then attempts to perform class template |
| /// instantiation. If instantiation fails, or if @p T is incomplete |
| /// and cannot be completed, issues the diagnostic @p diag (giving it |
| /// the type @p T) and returns true. |
| /// |
| /// @param Loc The location in the source that the incomplete type |
| /// diagnostic should refer to. |
| /// |
| /// @param T The type that this routine is examining for completeness. |
| /// |
| /// @param PD The partial diagnostic that will be printed out if T is not a |
| /// complete type. |
| /// |
| /// @returns @c true if @p T is incomplete and a diagnostic was emitted, |
| /// @c false otherwise. |
| bool Sema::RequireCompleteType(SourceLocation Loc, QualType T, |
| const PartialDiagnostic &PD, |
| std::pair<SourceLocation, |
| PartialDiagnostic> Note) { |
| unsigned diag = PD.getDiagID(); |
| |
| // FIXME: Add this assertion to make sure we always get instantiation points. |
| // assert(!Loc.isInvalid() && "Invalid location in RequireCompleteType"); |
| // FIXME: Add this assertion to help us flush out problems with |
| // checking for dependent types and type-dependent expressions. |
| // |
| // assert(!T->isDependentType() && |
| // "Can't ask whether a dependent type is complete"); |
| |
| // If we have a complete type, we're done. |
| NamedDecl *Def = 0; |
| if (!T->isIncompleteType(&Def)) { |
| // If we know about the definition but it is not visible, complain. |
| if (diag != 0 && Def && !LookupResult::isVisible(Def)) { |
| // Suppress this error outside of a SFINAE context if we've already |
| // emitted the error once for this type. There's no usefulness in |
| // repeating the diagnostic. |
| // FIXME: Add a Fix-It that imports the corresponding module or includes |
| // the header. |
| if (isSFINAEContext() || HiddenDefinitions.insert(Def)) { |
| Diag(Loc, diag::err_module_private_definition) << T; |
| Diag(Def->getLocation(), diag::note_previous_definition); |
| } |
| } |
| |
| return false; |
| } |
| |
| const TagType *Tag = T->getAs<TagType>(); |
| const ObjCInterfaceType *IFace = 0; |
| |
| if (Tag) { |
| // Avoid diagnosing invalid decls as incomplete. |
| if (Tag->getDecl()->isInvalidDecl()) |
| return true; |
| |
| // Give the external AST source a chance to complete the type. |
| if (Tag->getDecl()->hasExternalLexicalStorage()) { |
| Context.getExternalSource()->CompleteType(Tag->getDecl()); |
| if (!Tag->isIncompleteType()) |
| return false; |
| } |
| } |
| else if ((IFace = T->getAs<ObjCInterfaceType>())) { |
| // Avoid diagnosing invalid decls as incomplete. |
| if (IFace->getDecl()->isInvalidDecl()) |
| return true; |
| |
| // Give the external AST source a chance to complete the type. |
| if (IFace->getDecl()->hasExternalLexicalStorage()) { |
| Context.getExternalSource()->CompleteType(IFace->getDecl()); |
| if (!IFace->isIncompleteType()) |
| return false; |
| } |
| } |
| |
| // If we have a class template specialization or a class member of a |
| // class template specialization, or an array with known size of such, |
| // try to instantiate it. |
| QualType MaybeTemplate = T; |
| if (const ConstantArrayType *Array = Context.getAsConstantArrayType(T)) |
| MaybeTemplate = Array->getElementType(); |
| if (const RecordType *Record = MaybeTemplate->getAs<RecordType>()) { |
| if (ClassTemplateSpecializationDecl *ClassTemplateSpec |
| = dyn_cast<ClassTemplateSpecializationDecl>(Record->getDecl())) { |
| if (ClassTemplateSpec->getSpecializationKind() == TSK_Undeclared) |
| return InstantiateClassTemplateSpecialization(Loc, ClassTemplateSpec, |
| TSK_ImplicitInstantiation, |
| /*Complain=*/diag != 0); |
| } else if (CXXRecordDecl *Rec |
| = dyn_cast<CXXRecordDecl>(Record->getDecl())) { |
| if (CXXRecordDecl *Pattern = Rec->getInstantiatedFromMemberClass()) { |
| MemberSpecializationInfo *MSInfo = Rec->getMemberSpecializationInfo(); |
| assert(MSInfo && "Missing member specialization information?"); |
| // This record was instantiated from a class within a template. |
| if (MSInfo->getTemplateSpecializationKind() |
| != TSK_ExplicitSpecialization) |
| return InstantiateClass(Loc, Rec, Pattern, |
| getTemplateInstantiationArgs(Rec), |
| TSK_ImplicitInstantiation, |
| /*Complain=*/diag != 0); |
| } |
| } |
| } |
| |
| if (diag == 0) |
| return true; |
| |
| // We have an incomplete type. Produce a diagnostic. |
| Diag(Loc, PD) << T; |
| |
| // If we have a note, produce it. |
| if (!Note.first.isInvalid()) |
| Diag(Note.first, Note.second); |
| |
| // If the type was a forward declaration of a class/struct/union |
| // type, produce a note. |
| if (Tag && !Tag->getDecl()->isInvalidDecl()) |
| Diag(Tag->getDecl()->getLocation(), |
| Tag->isBeingDefined() ? diag::note_type_being_defined |
| : diag::note_forward_declaration) |
| << QualType(Tag, 0); |
| |
| // If the Objective-C class was a forward declaration, produce a note. |
| if (IFace && !IFace->getDecl()->isInvalidDecl()) |
| Diag(IFace->getDecl()->getLocation(), diag::note_forward_class); |
| |
| return true; |
| } |
| |
| bool Sema::RequireCompleteType(SourceLocation Loc, QualType T, |
| const PartialDiagnostic &PD) { |
| return RequireCompleteType(Loc, T, PD, |
| std::make_pair(SourceLocation(), PDiag(0))); |
| } |
| |
| bool Sema::RequireCompleteType(SourceLocation Loc, QualType T, |
| unsigned DiagID) { |
| return RequireCompleteType(Loc, T, PDiag(DiagID), |
| std::make_pair(SourceLocation(), PDiag(0))); |
| } |
| |
| /// @brief Ensure that the type T is a literal type. |
| /// |
| /// This routine checks whether the type @p T is a literal type. If @p T is an |
| /// incomplete type, an attempt is made to complete it. If @p T is a literal |
| /// type, or @p AllowIncompleteType is true and @p T is an incomplete type, |
| /// returns false. Otherwise, this routine issues the diagnostic @p PD (giving |
| /// it the type @p T), along with notes explaining why the type is not a |
| /// literal type, and returns true. |
| /// |
| /// @param Loc The location in the source that the non-literal type |
| /// diagnostic should refer to. |
| /// |
| /// @param T The type that this routine is examining for literalness. |
| /// |
| /// @param PD The partial diagnostic that will be printed out if T is not a |
| /// literal type. |
| /// |
| /// @returns @c true if @p T is not a literal type and a diagnostic was emitted, |
| /// @c false otherwise. |
| bool Sema::RequireLiteralType(SourceLocation Loc, QualType T, |
| const PartialDiagnostic &PD) { |
| assert(!T->isDependentType() && "type should not be dependent"); |
| |
| QualType ElemType = Context.getBaseElementType(T); |
| RequireCompleteType(Loc, ElemType, 0); |
| |
| if (T->isLiteralType()) |
| return false; |
| |
| if (PD.getDiagID() == 0) |
| return true; |
| |
| Diag(Loc, PD) << T; |
| |
| if (T->isVariableArrayType()) |
| return true; |
| |
| const RecordType *RT = ElemType->getAs<RecordType>(); |
| if (!RT) |
| return true; |
| |
| const CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl()); |
| |
| // FIXME: Better diagnostic for incomplete class? |
| if (!RD->isCompleteDefinition()) |
| return true; |
| |
| // If the class has virtual base classes, then it's not an aggregate, and |
| // cannot have any constexpr constructors or a trivial default constructor, |
| // so is non-literal. This is better to diagnose than the resulting absence |
| // of constexpr constructors. |
| if (RD->getNumVBases()) { |
| Diag(RD->getLocation(), diag::note_non_literal_virtual_base) |
| << RD->isStruct() << RD->getNumVBases(); |
| for (CXXRecordDecl::base_class_const_iterator I = RD->vbases_begin(), |
| E = RD->vbases_end(); I != E; ++I) |
| Diag(I->getSourceRange().getBegin(), |
| diag::note_constexpr_virtual_base_here) << I->getSourceRange(); |
| } else if (!RD->isAggregate() && !RD->hasConstexprNonCopyMoveConstructor() && |
| !RD->hasTrivialDefaultConstructor()) { |
| Diag(RD->getLocation(), diag::note_non_literal_no_constexpr_ctors) << RD; |
| } else if (RD->hasNonLiteralTypeFieldsOrBases()) { |
| for (CXXRecordDecl::base_class_const_iterator I = RD->bases_begin(), |
| E = RD->bases_end(); I != E; ++I) { |
| if (!I->getType()->isLiteralType()) { |
| Diag(I->getSourceRange().getBegin(), |
| diag::note_non_literal_base_class) |
| << RD << I->getType() << I->getSourceRange(); |
| return true; |
| } |
| } |
| for (CXXRecordDecl::field_iterator I = RD->field_begin(), |
| E = RD->field_end(); I != E; ++I) { |
| if (!(*I)->getType()->isLiteralType() || |
| (*I)->getType().isVolatileQualified()) { |
| Diag((*I)->getLocation(), diag::note_non_literal_field) |
| << RD << (*I) << (*I)->getType() |
| << (*I)->getType().isVolatileQualified(); |
| return true; |
| } |
| } |
| } else if (!RD->hasTrivialDestructor()) { |
| // All fields and bases are of literal types, so have trivial destructors. |
| // If this class's destructor is non-trivial it must be user-declared. |
| CXXDestructorDecl *Dtor = RD->getDestructor(); |
| assert(Dtor && "class has literal fields and bases but no dtor?"); |
| if (!Dtor) |
| return true; |
| |
| Diag(Dtor->getLocation(), Dtor->isUserProvided() ? |
| diag::note_non_literal_user_provided_dtor : |
| diag::note_non_literal_nontrivial_dtor) << RD; |
| } |
| |
| return true; |
| } |
| |
| /// \brief Retrieve a version of the type 'T' that is elaborated by Keyword |
| /// and qualified by the nested-name-specifier contained in SS. |
| QualType Sema::getElaboratedType(ElaboratedTypeKeyword Keyword, |
| const CXXScopeSpec &SS, QualType T) { |
| if (T.isNull()) |
| return T; |
| NestedNameSpecifier *NNS; |
| if (SS.isValid()) |
| NNS = static_cast<NestedNameSpecifier *>(SS.getScopeRep()); |
| else { |
| if (Keyword == ETK_None) |
| return T; |
| NNS = 0; |
| } |
| return Context.getElaboratedType(Keyword, NNS, T); |
| } |
| |
| QualType Sema::BuildTypeofExprType(Expr *E, SourceLocation Loc) { |
| ExprResult ER = CheckPlaceholderExpr(E); |
| if (ER.isInvalid()) return QualType(); |
| E = ER.take(); |
| |
| if (!E->isTypeDependent()) { |
| QualType T = E->getType(); |
| if (const TagType *TT = T->getAs<TagType>()) |
| DiagnoseUseOfDecl(TT->getDecl(), E->getExprLoc()); |
| } |
| return Context.getTypeOfExprType(E); |
| } |
| |
| /// getDecltypeForExpr - Given an expr, will return the decltype for |
| /// that expression, according to the rules in C++11 |
| /// [dcl.type.simple]p4 and C++11 [expr.lambda.prim]p18. |
| static QualType getDecltypeForExpr(Sema &S, Expr *E) { |
| if (E->isTypeDependent()) |
| return S.Context.DependentTy; |
| |
| // C++11 [dcl.type.simple]p4: |
| // The type denoted by decltype(e) is defined as follows: |
| // |
| // - if e is an unparenthesized id-expression or an unparenthesized class |
| // member access (5.2.5), decltype(e) is the type of the entity named |
| // by e. If there is no such entity, or if e names a set of overloaded |
| // functions, the program is ill-formed; |
| if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) { |
| if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) |
| return VD->getType(); |
| } |
| if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) { |
| if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) |
| return FD->getType(); |
| } |
| |
| // C++11 [expr.lambda.prim]p18: |
| // Every occurrence of decltype((x)) where x is a possibly |
| // parenthesized id-expression that names an entity of automatic |
| // storage duration is treated as if x were transformed into an |
| // access to a corresponding data member of the closure type that |
| // would have been declared if x were an odr-use of the denoted |
| // entity. |
| using namespace sema; |
| if (S.getCurLambda()) { |
| if (isa<ParenExpr>(E)) { |
| if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E->IgnoreParens())) { |
| if (VarDecl *Var = dyn_cast<VarDecl>(DRE->getDecl())) { |
| QualType T = S.getCapturedDeclRefType(Var, DRE->getLocation()); |
| if (!T.isNull()) |
| return S.Context.getLValueReferenceType(T); |
| } |
| } |
| } |
| } |
| |
| |
| // C++11 [dcl.type.simple]p4: |
| // [...] |
| QualType T = E->getType(); |
| switch (E->getValueKind()) { |
| // - otherwise, if e is an xvalue, decltype(e) is T&&, where T is the |
| // type of e; |
| case VK_XValue: T = S.Context.getRValueReferenceType(T); break; |
| // - otherwise, if e is an lvalue, decltype(e) is T&, where T is the |
| // type of e; |
| case VK_LValue: T = S.Context.getLValueReferenceType(T); break; |
| // - otherwise, decltype(e) is the type of e. |
| case VK_RValue: break; |
| } |
| |
| return T; |
| } |
| |
| QualType Sema::BuildDecltypeType(Expr *E, SourceLocation Loc) { |
| ExprResult ER = CheckPlaceholderExpr(E); |
| if (ER.isInvalid()) return QualType(); |
| E = ER.take(); |
| |
| return Context.getDecltypeType(E, getDecltypeForExpr(*this, E)); |
| } |
| |
| QualType Sema::BuildUnaryTransformType(QualType BaseType, |
| UnaryTransformType::UTTKind UKind, |
| SourceLocation Loc) { |
| switch (UKind) { |
| case UnaryTransformType::EnumUnderlyingType: |
| if (!BaseType->isDependentType() && !BaseType->isEnumeralType()) { |
| Diag(Loc, diag::err_only_enums_have_underlying_types); |
| return QualType(); |
| } else { |
| QualType Underlying = BaseType; |
| if (!BaseType->isDependentType()) { |
| EnumDecl *ED = BaseType->getAs<EnumType>()->getDecl(); |
| assert(ED && "EnumType has no EnumDecl"); |
| DiagnoseUseOfDecl(ED, Loc); |
| Underlying = ED->getIntegerType(); |
| } |
| assert(!Underlying.isNull()); |
| return Context.getUnaryTransformType(BaseType, Underlying, |
| UnaryTransformType::EnumUnderlyingType); |
| } |
| } |
| llvm_unreachable("unknown unary transform type"); |
| } |
| |
| QualType Sema::BuildAtomicType(QualType T, SourceLocation Loc) { |
| if (!T->isDependentType()) { |
| // FIXME: It isn't entirely clear whether incomplete atomic types |
| // are allowed or not; for simplicity, ban them for the moment. |
| if (RequireCompleteType(Loc, T, |
| PDiag(diag::err_atomic_specifier_bad_type) << 0)) |
| return QualType(); |
| |
| int DisallowedKind = -1; |
| if (T->isArrayType()) |
| DisallowedKind = 1; |
| else if (T->isFunctionType()) |
| DisallowedKind = 2; |
| else if (T->isReferenceType()) |
| DisallowedKind = 3; |
| else if (T->isAtomicType()) |
| DisallowedKind = 4; |
| else if (T.hasQualifiers()) |
| DisallowedKind = 5; |
| else if (!T.isTriviallyCopyableType(Context)) |
| // Some other non-trivially-copyable type (probably a C++ class) |
| DisallowedKind = 6; |
| |
| if (DisallowedKind != -1) { |
| Diag(Loc, diag::err_atomic_specifier_bad_type) << DisallowedKind << T; |
| return QualType(); |
| } |
| |
| // FIXME: Do we need any handling for ARC here? |
| } |
| |
| // Build the pointer type. |
| return Context.getAtomicType(T); |
| } |