| //===--- 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/SemaInternal.h" |
| #include "clang/Sema/Template.h" |
| #include "clang/AST/ASTContext.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/Sema/DeclSpec.h" |
| #include "llvm/ADT/SmallPtrSet.h" |
| #include "llvm/Support/ErrorHandling.h" |
| using namespace clang; |
| |
| /// \brief Perform adjustment on the parameter type of a function. |
| /// |
| /// This routine adjusts the given parameter type @p T to the actual |
| /// parameter type used by semantic analysis (C99 6.7.5.3p[7,8], |
| /// C++ [dcl.fct]p3). The adjusted parameter type is returned. |
| QualType Sema::adjustParameterType(QualType T) { |
| // C99 6.7.5.3p7: |
| // A declaration of a parameter as "array of type" shall be |
| // adjusted to "qualified pointer to type", where the type |
| // qualifiers (if any) are those specified within the [ and ] of |
| // the array type derivation. |
| if (T->isArrayType()) |
| return Context.getArrayDecayedType(T); |
| |
| // C99 6.7.5.3p8: |
| // A declaration of a parameter as "function returning type" |
| // shall be adjusted to "pointer to function returning type", as |
| // in 6.3.2.1. |
| if (T->isFunctionType()) |
| return Context.getPointerType(T); |
| |
| return T; |
| } |
| |
| |
| |
| /// 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; |
| } |
| |
| // 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 |
| |
| // 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 |
| |
| 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; |
| |
| /// The original set of attributes on the DeclSpec. |
| llvm::SmallVector<AttributeList*, 2> savedAttrs; |
| |
| /// A list of attributes to diagnose the uselessness of when the |
| /// processing is complete. |
| llvm::SmallVector<AttributeList*, 2> ignoredTypeAttrs; |
| |
| public: |
| TypeProcessingState(Sema &sema, Declarator &declarator) |
| : sema(sema), declarator(declarator), |
| chunkIndex(declarator.getNumTypeObjects()), |
| trivial(true) {} |
| |
| 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 (!savedAttrs.empty()) return; |
| |
| DeclSpec &spec = getMutableDeclSpec(); |
| for (AttributeList *attr = spec.getAttributes().getList(); attr; |
| attr = attr->getNext()) |
| savedAttrs.push_back(attr); |
| trivial &= savedAttrs.empty(); |
| } |
| |
| /// 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 (llvm::SmallVectorImpl<AttributeList*>::const_iterator |
| i = ignoredTypeAttrs.begin(), e = ignoredTypeAttrs.end(); |
| i != e; ++i) { |
| AttributeList &attr = **i; |
| getSema().Diag(attr.getLoc(), diag::warn_function_attribute_wrong_type) |
| << attr.getName() << type; |
| } |
| } |
| |
| ~TypeProcessingState() { |
| if (trivial) return; |
| |
| restoreDeclSpecAttrs(); |
| } |
| |
| private: |
| DeclSpec &getMutableDeclSpec() const { |
| return const_cast<DeclSpec&>(declarator.getDeclSpec()); |
| } |
| |
| void restoreDeclSpecAttrs() { |
| assert(!savedAttrs.empty()); |
| 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 handleObjCPointerTypeAttr(TypeProcessingState &state, |
| AttributeList &attr, QualType &type) { |
| // Right now, we have exactly one of these attributes: objc_gc. |
| assert(attr.getKind() == AttributeList::AT_objc_gc); |
| return handleObjCGCTypeAttr(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: |
| |
| state.getSema().Diag(attr.getLoc(), diag::warn_function_attribute_wrong_type) |
| << attr.getName() << 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)) |
| 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; |
| } |
| } |
| |
| state.getSema().Diag(attr.getLoc(), diag::warn_function_attribute_wrong_type) |
| << attr.getName() << 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; |
| } |
| |
| return handleFunctionTypeAttr(state, attr, declSpecType); |
| } |
| |
| /// 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; |
| |
| 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( |
| ParsedAttributes(), |
| /*proto*/ true, |
| /*variadic*/ false, SourceLocation(), |
| /*args*/ 0, 0, |
| /*type quals*/ 0, |
| /*ref-qualifier*/true, SourceLocation(), |
| /*EH*/ false, SourceLocation(), false, 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(Sema &S, TypeProcessingState &state) { |
| // FIXME: Should move the logic from DeclSpec::Finish to here for validity |
| // checking. |
| |
| 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. |
| if (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().Microsoft) { |
| 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.getLangOptions().CPlusPlus0x) |
| S.Diag(DS.getTypeSpecWidthLoc(), 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.getLangOptions().CPlusPlus0x) |
| S.Diag(DS.getTypeSpecWidthLoc(), diag::ext_longlong); |
| break; |
| } |
| } |
| 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; |
| 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.getTypeSpecTypeLoc()); |
| |
| assert(DS.getTypeSpecWidth() == 0 && DS.getTypeSpecComplex() == 0 && |
| DS.getTypeSpecSign() == 0 && "No qualifiers on tag names!"); |
| |
| // TypeQuals handled by caller. |
| Result = Context.getTypeDeclType(D); |
| |
| // In C++, make an ElaboratedType. |
| if (S.getLangOptions().CPlusPlus) { |
| 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_auto: { |
| // TypeQuals handled by caller. |
| Result = Context.UndeducedAutoTy; |
| 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); |
| } |
| |
| /// \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"); |
| |
| // 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) { |
| // 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(); |
| } |
| |
| // Handle restrict on references. |
| if (LValueRef) |
| return Context.getLValueReferenceType(T, SpelledAsLValue); |
| return Context.getRValueReferenceType(T); |
| } |
| |
| /// \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 (Context.getCanonicalType(T) == Context.UndeducedAutoTy) { |
| Diag(Loc, diag::err_illegal_decl_array_of_auto) |
| << getPrintableNameForEntity(Entity); |
| 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 lvalue-to-rvalue conversions on the array size expression. |
| if (ArraySize && !ArraySize->isRValue()) |
| DefaultLvalueConversion(ArraySize); |
| |
| // C99 6.7.5.2p1: The size expression shall have integer type. |
| // TODO: in theory, if we were insane, we could allow contextual |
| // conversions to integer type here. |
| if (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 (!ArraySize->isIntegerConstantExpr(ConstVal, Context) || |
| (!T->isDependentType() && !T->isIncompleteType() && |
| !T->isConstantSizeType())) { |
| // Per C99, a variable array is an array with either a non-constant |
| // size or an element type that has a non-constant-size |
| 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(); |
| } 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. |
| if (!T->isDependentType() && |
| !Context.getBaseElementType(T)->isPODType()) { |
| Diag(Loc, diag::err_vla_non_pod) |
| << Context.getBaseElementType(T); |
| 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); |
| } |
| |
| 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(); |
| } |
| |
| if (!T->isDependentType()) |
| 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 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, 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(); |
| } |
| |
| bool Invalid = false; |
| for (unsigned Idx = 0; Idx < NumParamTypes; ++Idx) { |
| QualType ParamType = adjustParameterType(ParamTypes[Idx]); |
| if (ParamType->isVoidType()) { |
| Diag(Loc, diag::err_param_with_void_type); |
| Invalid = true; |
| } |
| |
| ParamTypes[Idx] = ParamType; |
| } |
| |
| if (Invalid) |
| return QualType(); |
| |
| FunctionProtoType::ExtProtoInfo EPI; |
| EPI.Variadic = Variadic; |
| 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 CVR Qualifiers applied to the member pointer type |
| /// \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.Target.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; |
| } |
| |
| /// GetTypeForDeclarator - Convert the type for the specified |
| /// declarator to Type instances. |
| /// |
| /// If OwnedDecl is non-NULL, and this declarator's decl-specifier-seq |
| /// owns the declaration of a type (e.g., the definition of a struct |
| /// type), then *OwnedDecl will receive the owned declaration. |
| /// |
| /// 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, |
| TagDecl **OwnedDecl) { |
| // Determine the type of the declarator. Not all forms of declarator |
| // have a type. |
| QualType T; |
| TypeSourceInfo *ReturnTypeInfo = 0; |
| |
| TypeProcessingState state(*this, D); |
| |
| switch (D.getName().getKind()) { |
| case UnqualifiedId::IK_Identifier: |
| case UnqualifiedId::IK_OperatorFunctionId: |
| case UnqualifiedId::IK_LiteralOperatorId: |
| case UnqualifiedId::IK_TemplateId: |
| T = ConvertDeclSpecToType(*this, state); |
| |
| if (!D.isInvalidType() && D.getDeclSpec().isTypeSpecOwned()) { |
| TagDecl* Owned = cast<TagDecl>(D.getDeclSpec().getRepAsDecl()); |
| // Owned is embedded if it was defined here, or if it is the |
| // very first (i.e., canonical) declaration of this tag type. |
| Owned->setEmbeddedInDeclarator(Owned->isDefinition() || |
| Owned->isCanonicalDecl()); |
| if (OwnedDecl) *OwnedDecl = Owned; |
| } |
| 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 = Context.VoidTy; |
| break; |
| |
| case UnqualifiedId::IK_ConversionFunctionId: |
| // The result type of a conversion function is the type that it |
| // converts to. |
| T = GetTypeFromParser(D.getName().ConversionFunctionId, |
| &ReturnTypeInfo); |
| break; |
| } |
| |
| if (D.getAttributes()) |
| distributeTypeAttrsFromDeclarator(state, T); |
| |
| // Check for auto functions and trailing return type and adjust the |
| // return type accordingly. |
| if (getLangOptions().CPlusPlus0x && D.isFunctionDeclarator()) { |
| const DeclaratorChunk::FunctionTypeInfo &FTI = D.getFunctionTypeInfo(); |
| if (T == Context.UndeducedAutoTy) { |
| if (FTI.TrailingReturnType) { |
| T = GetTypeFromParser(ParsedType::getFromOpaquePtr(FTI.TrailingReturnType), |
| &ReturnTypeInfo); |
| } |
| else { |
| Diag(D.getDeclSpec().getTypeSpecTypeLoc(), |
| diag::err_auto_missing_trailing_return); |
| T = Context.IntTy; |
| D.setInvalidType(true); |
| } |
| } |
| else if (FTI.TrailingReturnType) { |
| Diag(D.getDeclSpec().getTypeSpecTypeLoc(), |
| diag::err_trailing_return_without_auto); |
| D.setInvalidType(true); |
| } |
| } |
| |
| if (T.isNull()) |
| return Context.getNullTypeSourceInfo(); |
| |
| if (T == Context.UndeducedAutoTy) { |
| int Error = -1; |
| |
| switch (D.getContext()) { |
| case Declarator::KNRTypeListContext: |
| assert(0 && "K&R type lists aren't allowed in C++"); |
| break; |
| case Declarator::PrototypeContext: |
| Error = 0; // Function prototype |
| break; |
| case Declarator::MemberContext: |
| switch (cast<TagDecl>(CurContext)->getTagKind()) { |
| case TTK_Enum: assert(0 && "unhandled tag kind"); break; |
| 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: |
| Error = 4; // Exception declaration |
| break; |
| case Declarator::TemplateParamContext: |
| Error = 5; // Template parameter |
| break; |
| case Declarator::BlockLiteralContext: |
| Error = 6; // Block literal |
| break; |
| case Declarator::FileContext: |
| case Declarator::BlockContext: |
| case Declarator::ForContext: |
| case Declarator::ConditionContext: |
| case Declarator::TypeNameContext: |
| case Declarator::TemplateTypeArgContext: |
| break; |
| } |
| |
| if (Error != -1) { |
| Diag(D.getDeclSpec().getTypeSpecTypeLoc(), diag::err_auto_not_allowed) |
| << Error; |
| T = Context.IntTy; |
| D.setInvalidType(true); |
| } |
| } |
| |
| // The name we're declaring, if any. |
| DeclarationName Name; |
| if (D.getIdentifier()) |
| Name = D.getIdentifier(); |
| |
| // 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); |
| switch (DeclType.Kind) { |
| default: assert(0 && "Unknown decltype!"); |
| case DeclaratorChunk::Paren: |
| T = BuildParenType(T); |
| break; |
| case DeclaratorChunk::BlockPointer: |
| // If blocks are disabled, emit an error. |
| if (!LangOpts.Blocks) |
| Diag(DeclType.Loc, diag::err_blocks_disable); |
| |
| T = BuildBlockPointerType(T, D.getIdentifierLoc(), Name); |
| if (DeclType.Cls.TypeQuals) |
| T = 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 (getLangOptions().CPlusPlus && CheckDistantExceptionSpec(T)) { |
| Diag(D.getIdentifierLoc(), diag::err_distant_exception_spec); |
| D.setInvalidType(true); |
| // Build the type anyway. |
| } |
| if (getLangOptions().ObjC1 && T->getAs<ObjCObjectType>()) { |
| T = Context.getObjCObjectPointerType(T); |
| if (DeclType.Ptr.TypeQuals) |
| T = BuildQualifiedType(T, DeclType.Loc, DeclType.Ptr.TypeQuals); |
| break; |
| } |
| T = BuildPointerType(T, DeclType.Loc, Name); |
| if (DeclType.Ptr.TypeQuals) |
| T = 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 (getLangOptions().CPlusPlus && CheckDistantExceptionSpec(T)) { |
| Diag(D.getIdentifierLoc(), diag::err_distant_exception_spec); |
| D.setInvalidType(true); |
| // Build the type anyway. |
| } |
| T = BuildReferenceType(T, DeclType.Ref.LValueRef, DeclType.Loc, Name); |
| |
| Qualifiers Quals; |
| if (DeclType.Ref.HasRestrict) |
| T = 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 (getLangOptions().CPlusPlus && CheckDistantExceptionSpec(T)) { |
| 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.getContext() != Declarator::PrototypeContext) { |
| // 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 |
| Diag(DeclType.Loc, diag::err_array_star_outside_prototype); |
| ASM = ArrayType::Normal; |
| D.setInvalidType(true); |
| } |
| T = BuildArrayType(T, ASM, ArraySize, |
| Qualifiers::fromCVRMask(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; |
| |
| // 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; |
| Diag(DeclType.Loc, diagID) << T->isFunctionType() << T; |
| T = Context.IntTy; |
| D.setInvalidType(true); |
| } |
| |
| // cv-qualifiers on return types are pointless except when the type is a |
| // class type in C++. |
| if (T.getCVRQualifiers() && D.getDeclSpec().getTypeQualifiers() && |
| (!getLangOptions().CPlusPlus || |
| (!T->isDependentType() && !T->isRecordType()))) { |
| unsigned Quals = D.getDeclSpec().getTypeQualifiers(); |
| std::string QualStr; |
| unsigned NumQuals = 0; |
| SourceLocation Loc; |
| if (Quals & Qualifiers::Const) { |
| Loc = D.getDeclSpec().getConstSpecLoc(); |
| ++NumQuals; |
| QualStr = "const"; |
| } |
| if (Quals & Qualifiers::Volatile) { |
| if (NumQuals == 0) { |
| Loc = D.getDeclSpec().getVolatileSpecLoc(); |
| QualStr = "volatile"; |
| } else |
| QualStr += " volatile"; |
| ++NumQuals; |
| } |
| if (Quals & Qualifiers::Restrict) { |
| if (NumQuals == 0) { |
| Loc = D.getDeclSpec().getRestrictSpecLoc(); |
| QualStr = "restrict"; |
| } else |
| QualStr += " restrict"; |
| ++NumQuals; |
| } |
| assert(NumQuals > 0 && "No known qualifiers?"); |
| |
| SemaDiagnosticBuilder DB = Diag(Loc, diag::warn_qual_return_type); |
| DB << QualStr << NumQuals; |
| if (Quals & Qualifiers::Const) |
| DB << FixItHint::CreateRemoval(D.getDeclSpec().getConstSpecLoc()); |
| if (Quals & Qualifiers::Volatile) |
| DB << FixItHint::CreateRemoval(D.getDeclSpec().getVolatileSpecLoc()); |
| if (Quals & Qualifiers::Restrict) |
| DB << FixItHint::CreateRemoval(D.getDeclSpec().getRestrictSpecLoc()); |
| } |
| |
| if (getLangOptions().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->isDefinition()) |
| 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 (FTI.hasExceptionSpec && |
| D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef) |
| Diag(FTI.getThrowLoc(), diag::err_exception_spec_in_typedef); |
| |
| if (!FTI.NumArgs && !FTI.isVariadic && !getLangOptions().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 && !getLangOptions().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) |
| 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. |
| Diag(FTI.ArgInfo[0].IdentLoc, diag::err_ident_list_in_fn_declaration); |
| D.setInvalidType(true); |
| break; |
| } |
| |
| FunctionProtoType::ExtProtoInfo EPI; |
| EPI.Variadic = FTI.isVariadic; |
| 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. |
| llvm::SmallVector<QualType, 16> ArgTys; |
| ArgTys.reserve(FTI.NumArgs); |
| |
| 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 == adjustParameterType(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) { |
| 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)'. |
| 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()) |
| Diag(DeclType.Loc, diag::err_void_param_qualified); |
| |
| // Do not add 'void' to the ArgTys list. |
| break; |
| } |
| } else if (!FTI.hasPrototype) { |
| if (ArgTy->isPromotableIntegerType()) { |
| ArgTy = Context.getPromotedIntegerType(ArgTy); |
| } else if (const BuiltinType* BTy = ArgTy->getAs<BuiltinType>()) { |
| if (BTy->getKind() == BuiltinType::Float) |
| ArgTy = Context.DoubleTy; |
| } |
| } |
| |
| ArgTys.push_back(ArgTy); |
| } |
| |
| llvm::SmallVector<QualType, 4> Exceptions; |
| if (FTI.hasExceptionSpec) { |
| EPI.HasExceptionSpec = FTI.hasExceptionSpec; |
| EPI.HasAnyExceptionSpec = FTI.hasAnyExceptionSpec; |
| Exceptions.reserve(FTI.NumExceptions); |
| for (unsigned ei = 0, ee = FTI.NumExceptions; ei != ee; ++ei) { |
| // FIXME: Preserve type source info. |
| QualType ET = GetTypeFromParser(FTI.Exceptions[ei].Ty); |
| // Check that the type is valid for an exception spec, and |
| // drop it if not. |
| if (!CheckSpecifiedExceptionType(ET, FTI.Exceptions[ei].Range)) |
| Exceptions.push_back(ET); |
| } |
| EPI.NumExceptions = Exceptions.size(); |
| EPI.Exceptions = Exceptions.data(); |
| } |
| |
| 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 (isDependentScopeSpecifier(SS) || |
| dyn_cast_or_null<CXXRecordDecl>(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::Global: |
| llvm_unreachable("Nested-name-specifier must name a type"); |
| break; |
| |
| case NestedNameSpecifier::TypeSpec: |
| case NestedNameSpecifier::TypeSpecWithTemplate: |
| ClsType = QualType(NNS->getAsType(), 0); |
| // Note: if NNS is dependent, then its prefix (if any) is already |
| // included in ClsType; this does not hold if the NNS is |
| // nondependent: in this case (if there is indeed a prefix) |
| // ClsType needs to be wrapped into an elaborated type. |
| if (NNSPrefix && !NNS->isDependent()) |
| ClsType = Context.getElaboratedType(ETK_None, NNSPrefix, ClsType); |
| break; |
| } |
| } else { |
| 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 = BuildMemberPointerType(T, ClsType, DeclType.Loc, D.getIdentifier()); |
| if (T.isNull()) { |
| T = Context.IntTy; |
| D.setInvalidType(true); |
| } else if (DeclType.Mem.TypeQuals) { |
| T = 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 (getLangOptions().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.getDeclSpec().isFriendSpecified()); |
| } else { |
| DeclContext *DC = computeDeclContext(D.getCXXScopeSpec()); |
| FreeFunction = (DC && !DC->isRecord()); |
| } |
| |
| // C++0x [dcl.fct]p6: |
| // A ref-qualifier shall only be part of the function type for a |
| // non-static member function, the function type to which a pointer to |
| // member refers, or the top-level function type of a function typedef |
| // declaration. |
| if ((FnTy->getTypeQuals() != 0 || FnTy->getRefQualifier()) && |
| !(D.getContext() == Declarator::TemplateTypeArgContext && |
| !D.isFunctionDeclarator()) && |
| D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_typedef && |
| (FreeFunction || |
| D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_static)) { |
| if (D.getContext() == Declarator::TemplateTypeArgContext) { |
| // Accept qualified function types as template type arguments as a GNU |
| // extension. This is also the subject of C++ core issue 547. |
| std::string Quals; |
| if (FnTy->getTypeQuals() != 0) |
| 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; |
| } |
| |
| Diag(D.getIdentifierLoc(), |
| diag::ext_qualified_function_type_template_arg) |
| << Quals; |
| } else { |
| if (FnTy->getTypeQuals() != 0) { |
| if (D.isFunctionDeclarator()) |
| Diag(D.getIdentifierLoc(), |
| diag::err_invalid_qualified_function_type); |
| else |
| Diag(D.getIdentifierLoc(), |
| diag::err_invalid_qualified_typedef_function_type_use) |
| << FreeFunction; |
| } |
| |
| if (FnTy->getRefQualifier()) { |
| if (D.isFunctionDeclarator()) { |
| SourceLocation Loc = D.getIdentifierLoc(); |
| for (unsigned I = 0, N = D.getNumTypeObjects(); I != N; ++I) { |
| const DeclaratorChunk &Chunk = D.getTypeObject(N-I-1); |
| if (Chunk.Kind == DeclaratorChunk::Function && |
| Chunk.Fun.hasRefQualifier()) { |
| Loc = Chunk.Fun.getRefQualifierLoc(); |
| break; |
| } |
| } |
| |
| Diag(Loc, diag::err_invalid_ref_qualifier_function_type) |
| << (FnTy->getRefQualifier() == RQ_LValue) |
| << FixItHint::CreateRemoval(Loc); |
| } else { |
| Diag(D.getIdentifierLoc(), |
| diag::err_invalid_ref_qualifier_typedef_function_type_use) |
| << FreeFunction |
| << (FnTy->getRefQualifier() == RQ_LValue); |
| } |
| } |
| |
| // 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); |
| |
| // If there's a constexpr specifier, treat it as a top-level const. |
| if (D.getDeclSpec().isConstexprSpecified()) { |
| 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()) { |
| 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 if (!getLangOptions().CPlusPlus0x) |
| Diag(D.getEllipsisLoc(), diag::ext_variadic_templates); |
| break; |
| |
| case Declarator::FileContext: |
| case Declarator::KNRTypeListContext: |
| case Declarator::TypeNameContext: |
| case Declarator::MemberContext: |
| case Declarator::BlockContext: |
| case Declarator::ForContext: |
| case Declarator::ConditionContext: |
| case Declarator::CXXCatchContext: |
| case Declarator::BlockLiteralContext: |
| case Declarator::TemplateTypeArgContext: |
| // FIXME: We may want to allow parameter packs in block-literal contexts |
| // in the future. |
| 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 GetTypeSourceInfoForDeclarator(D, T, ReturnTypeInfo); |
| } |
| |
| namespace { |
| class TypeSpecLocFiller : public TypeLocVisitor<TypeSpecLocFiller> { |
| ASTContext &Context; |
| const DeclSpec &DS; |
| |
| public: |
| TypeSpecLocFiller(ASTContext &Context, const DeclSpec &DS) |
| : Context(Context), DS(DS) {} |
| |
| 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.getTypeSpecTypeLoc()); |
| 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 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.setKeywordLoc(Keyword != ETK_None |
| ? DS.getTypeSpecTypeLoc() |
| : SourceLocation()); |
| const CXXScopeSpec& SS = DS.getTypeSpecScope(); |
| TL.setQualifierRange(SS.isEmpty() ? SourceRange(): SS.getRange()); |
| Visit(TL.getNextTypeLoc().getUnqualifiedLoc()); |
| } |
| void VisitDependentNameTypeLoc(DependentNameTypeLoc 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<DependentNameTypeLoc>(TInfo->getTypeLoc())); |
| return; |
| } |
| } |
| TL.setKeywordLoc(Keyword != ETK_None |
| ? DS.getTypeSpecTypeLoc() |
| : SourceLocation()); |
| const CXXScopeSpec& SS = DS.getTypeSpecScope(); |
| TL.setQualifierRange(SS.isEmpty() ? SourceRange() : SS.getRange()); |
| // FIXME: load appropriate source location. |
| TL.setNameLoc(DS.getTypeSpecTypeLoc()); |
| } |
| void VisitDependentTemplateSpecializationTypeLoc( |
| DependentTemplateSpecializationTypeLoc TL) { |
| ElaboratedTypeKeyword Keyword |
| = TypeWithKeyword::getKeywordForTypeSpec(DS.getTypeSpecType()); |
| if (Keyword == ETK_Typename) { |
| TypeSourceInfo *TInfo = 0; |
| Sema::GetTypeFromParser(DS.getRepAsType(), &TInfo); |
| if (TInfo) { |
| TL.copy(cast<DependentTemplateSpecializationTypeLoc>( |
| TInfo->getTypeLoc())); |
| return; |
| } |
| } |
| TL.initializeLocal(Context, SourceLocation()); |
| TL.setKeywordLoc(Keyword != ETK_None |
| ? DS.getTypeSpecTypeLoc() |
| : SourceLocation()); |
| const CXXScopeSpec& SS = DS.getTypeSpecScope(); |
| TL.setQualifierRange(SS.isEmpty() ? SourceRange() : SS.getRange()); |
| // FIXME: load appropriate source location. |
| TL.setNameLoc(DS.getTypeSpecTypeLoc()); |
| } |
| |
| 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> { |
| const DeclaratorChunk &Chunk; |
| |
| public: |
| DeclaratorLocFiller(const DeclaratorChunk &Chunk) : Chunk(Chunk) {} |
| |
| void VisitQualifiedTypeLoc(QualifiedTypeLoc TL) { |
| llvm_unreachable("qualified type locs not expected here!"); |
| } |
| |
| 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); |
| TL.setStarLoc(Chunk.Loc); |
| // FIXME: nested name specifier |
| } |
| 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.setLParenLoc(Chunk.Loc); |
| TL.setRParenLoc(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) { |
| DeclaratorLocFiller(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 { |
| assert(false && "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!"); |
| |
| TagDecl *OwnedTag = 0; |
| TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S, &OwnedTag); |
| QualType T = TInfo->getType(); |
| if (D.isInvalidType()) |
| return true; |
| |
| if (getLangOptions().CPlusPlus) { |
| // Check that there are no default arguments (C++ only). |
| CheckExtraCXXDefaultArguments(D); |
| |
| // C++0x [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). |
| if (OwnedTag && OwnedTag->isDefinition()) |
| Diag(OwnedTag->getLocation(), diag::err_type_defined_in_type_specifier) |
| << Context.getTypeDeclType(OwnedTag); |
| } |
| |
| 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. |
| // Clause 6.7.3 - Type qualifiers: "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; |
| } |
| |
| // 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); |
| } |
| |
| /// 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; |
| } |
| |
| type = S.Context.getObjCGCQualType(type, GCAttr); |
| 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; |
| llvm::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.second.empty()) |
| return wrap(C, SplitOld.first, I); |
| return C.getQualifiedType(wrap(C, SplitOld.first, I), SplitOld.second); |
| } |
| |
| 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"); |
| return QualType(); |
| } |
| }; |
| } |
| |
| /// 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; |
| } |
| |
| 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 != 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->getRegParmType()) { |
| 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; |
| } |
| |
| /// 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); |
| } |
| |
| /// 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_address_space: |
| HandleAddressSpaceTypeAttribute(type, attr, state.getSema()); |
| break; |
| OBJC_POINTER_TYPE_ATTRS_CASELIST: |
| if (!handleObjCPointerTypeAttr(state, attr, type)) |
| distributeObjCPointerTypeAttr(state, attr, type); |
| break; |
| case AttributeList::AT_vector_size: |
| HandleVectorSizeAttr(type, attr, state.getSema()); |
| break; |
| case AttributeList::AT_neon_vector_type: |
| HandleNeonVectorTypeAttr(type, attr, state.getSema(), |
| VectorType::NeonVector, "neon_vector_type"); |
| break; |
| case AttributeList::AT_neon_polyvector_type: |
| HandleNeonVectorTypeAttr(type, attr, state.getSema(), |
| VectorType::NeonPolyVector, |
| "neon_polyvector_type"); |
| break; |
| |
| FUNCTION_TYPE_ATTRS_CASELIST: |
| // 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 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. |
| if (!T->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; |
| |
| const TagType *Tag = T->getAs<TagType>(); |
| |
| // Avoid diagnosing invalid decls as incomplete. |
| if (Tag && Tag->getDecl()->isInvalidDecl()) |
| return true; |
| |
| // Give the external AST source a chance to complete the type. |
| if (Tag && Tag->getDecl()->hasExternalLexicalStorage()) { |
| Context.getExternalSource()->CompleteType(Tag->getDecl()); |
| if (!Tag->isIncompleteType()) |
| return false; |
| } |
| |
| // 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); |
| |
| 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 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, Loc); |
| 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); |
| } |
| |
| QualType Sema::BuildDecltypeType(Expr *E, SourceLocation Loc) { |
| ExprResult ER = CheckPlaceholderExpr(E, Loc); |
| if (ER.isInvalid()) return QualType(); |
| E = ER.take(); |
| |
| return Context.getDecltypeType(E); |
| } |