diff options
Diffstat (limited to 'lib/Sema/SemaType.cpp')
| -rw-r--r-- | lib/Sema/SemaType.cpp | 1301 |
1 files changed, 1301 insertions, 0 deletions
diff --git a/lib/Sema/SemaType.cpp b/lib/Sema/SemaType.cpp new file mode 100644 index 0000000..81ac211 --- /dev/null +++ b/lib/Sema/SemaType.cpp @@ -0,0 +1,1301 @@ +//===--- 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 "Sema.h" +#include "clang/AST/ASTContext.h" +#include "clang/AST/DeclObjC.h" +#include "clang/AST/DeclTemplate.h" +#include "clang/AST/Expr.h" +#include "clang/Parse/DeclSpec.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: + if (T->isArrayType()) { + // 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. + return Context.getArrayDecayedType(T); + } else if (T->isFunctionType()) + // 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. + return Context.getPointerType(T); + + return T; +} + +/// \brief Convert the specified declspec to the appropriate type +/// object. +/// \param DS the declaration specifiers +/// \param DeclLoc The location of the declarator identifier or invalid if none. +/// \returns The type described by the declaration specifiers. This function +/// never returns null. +QualType Sema::ConvertDeclSpecToType(const DeclSpec &DS, + SourceLocation DeclLoc, + bool &isInvalid) { + // FIXME: Should move the logic from DeclSpec::Finish to here for validity + // checking. + 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) { + 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"); + Diag(DS.getTypeSpecSignLoc(), diag::ext_invalid_sign_spec) + << DS.getSpecifierName(DS.getTypeSpecType()); + Result = Context.getUnsignedWCharType(); + } + break; + case DeclSpec::TST_unspecified: + // "<proto1,proto2>" is an objc qualified ID with a missing id. + if (DeclSpec::ProtocolQualifierListTy PQ = DS.getProtocolQualifiers()) { + Result = Context.getObjCQualifiedIdType((ObjCProtocolDecl**)PQ, + DS.getNumProtocolQualifiers()); + 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 (getLangOptions().ImplicitInt) { + // In C89 mode, we only warn if there is a completely missing declspec + // when one is not allowed. + if (DS.isEmpty()) { + if (DeclLoc.isInvalid()) + DeclLoc = DS.getSourceRange().getBegin(); + Diag(DeclLoc, diag::warn_missing_declspec) + << DS.getSourceRange() + << CodeModificationHint::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 (DeclLoc.isInvalid()) + DeclLoc = DS.getSourceRange().getBegin(); + + if (getLangOptions().CPlusPlus && !getLangOptions().Microsoft) + Diag(DeclLoc, diag::err_missing_type_specifier) + << DS.getSourceRange(); + else + Diag(DeclLoc, diag::warn_missing_type_specifier) + << DS.getSourceRange(); + + // FIXME: If we could guarantee that the result would be well-formed, it + // would be useful to have a code insertion hint here. However, after + // emitting this warning/error, we often emit other errors. + } + + // 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; 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; 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 + Diag(DS.getTypeSpecTypeLoc(), diag::err_decimal_unsupported); + Result = Context.IntTy; + isInvalid = true; + break; + case DeclSpec::TST_class: + case DeclSpec::TST_enum: + case DeclSpec::TST_union: + case DeclSpec::TST_struct: { + Decl *D = static_cast<Decl *>(DS.getTypeRep()); + assert(D && "Didn't get a decl for a class/enum/union/struct?"); + assert(DS.getTypeSpecWidth() == 0 && DS.getTypeSpecComplex() == 0 && + DS.getTypeSpecSign() == 0 && + "Can't handle qualifiers on typedef names yet!"); + // TypeQuals handled by caller. + Result = Context.getTypeDeclType(cast<TypeDecl>(D)); + + if (D->isInvalidDecl()) + isInvalid = 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 = QualType::getFromOpaquePtr(DS.getTypeRep()); + + if (DeclSpec::ProtocolQualifierListTy PQ = DS.getProtocolQualifiers()) { + // FIXME: Adding a TST_objcInterface clause doesn't seem ideal, so we have + // this "hack" for now... + if (const ObjCInterfaceType *Interface = Result->getAsObjCInterfaceType()) + Result = Context.getObjCQualifiedInterfaceType(Interface->getDecl(), + (ObjCProtocolDecl**)PQ, + DS.getNumProtocolQualifiers()); + else if (Result == Context.getObjCIdType()) + // id<protocol-list> + Result = Context.getObjCQualifiedIdType((ObjCProtocolDecl**)PQ, + DS.getNumProtocolQualifiers()); + else if (Result == Context.getObjCClassType()) { + if (DeclLoc.isInvalid()) + DeclLoc = DS.getSourceRange().getBegin(); + // Class<protocol-list> + Diag(DeclLoc, diag::err_qualified_class_unsupported) + << DS.getSourceRange(); + } else { + if (DeclLoc.isInvalid()) + DeclLoc = DS.getSourceRange().getBegin(); + Diag(DeclLoc, diag::err_invalid_protocol_qualifiers) + << DS.getSourceRange(); + isInvalid = true; + } + } + + // If this is a reference to an invalid typedef, propagate the invalidity. + if (TypedefType *TDT = dyn_cast<TypedefType>(Result)) + if (TDT->getDecl()->isInvalidDecl()) + isInvalid = true; + + // TypeQuals handled by caller. + break; + } + case DeclSpec::TST_typeofType: + Result = QualType::getFromOpaquePtr(DS.getTypeRep()); + assert(!Result.isNull() && "Didn't get a type for typeof?"); + // TypeQuals handled by caller. + Result = Context.getTypeOfType(Result); + break; + case DeclSpec::TST_typeofExpr: { + Expr *E = static_cast<Expr *>(DS.getTypeRep()); + assert(E && "Didn't get an expression for typeof?"); + // TypeQuals handled by caller. + Result = Context.getTypeOfExprType(E); + break; + } + case DeclSpec::TST_error: + Result = Context.IntTy; + isInvalid = true; + break; + } + + // Handle complex types. + if (DS.getTypeSpecComplex() == DeclSpec::TSC_complex) { + if (getLangOptions().Freestanding) + Diag(DS.getTypeSpecComplexLoc(), diag::ext_freestanding_complex); + Result = Context.getComplexType(Result); + } + + assert(DS.getTypeSpecComplex() != DeclSpec::TSC_imaginary && + "FIXME: imaginary types not supported yet!"); + + // See if there are any attributes on the declspec that apply to the type (as + // opposed to the decl). + if (const AttributeList *AL = DS.getAttributes()) + ProcessTypeAttributeList(Result, AL); + + // 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 & QualType::Restrict) { + if (Result->isPointerType() || Result->isReferenceType()) { + QualType EltTy = Result->isPointerType() ? + Result->getAsPointerType()->getPointeeType() : + Result->getAsReferenceType()->getPointeeType(); + + // If we have a pointer or reference, the pointee must have an object + // incomplete type. + if (!EltTy->isIncompleteOrObjectType()) { + Diag(DS.getRestrictSpecLoc(), + diag::err_typecheck_invalid_restrict_invalid_pointee) + << EltTy << DS.getSourceRange(); + TypeQuals &= ~QualType::Restrict; // Remove the restrict qualifier. + } + } else { + Diag(DS.getRestrictSpecLoc(), + diag::err_typecheck_invalid_restrict_not_pointer) + << Result << DS.getSourceRange(); + TypeQuals &= ~QualType::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 & QualType::Const) + Loc = DS.getConstSpecLoc(); + else { + assert((TypeQuals & QualType::Volatile) && + "Has CV quals but not C or V?"); + Loc = DS.getVolatileSpecLoc(); + } + 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 &= ~QualType::Const; + TypeQuals &= ~QualType::Volatile; + } + + Result = Result.getQualifiedType(TypeQuals); + } + return Result; +} + +static std::string getPrintableNameForEntity(DeclarationName Entity) { + if (Entity) + return Entity.getAsString(); + + return "type name"; +} + +/// \brief Build a pointer type. +/// +/// \param T The type to which we'll be building a pointer. +/// +/// \param Quals The cvr-qualifiers to be applied to the pointer type. +/// +/// \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, unsigned Quals, + 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); + return QualType(); + } + + // Enforce C99 6.7.3p2: "Types other than pointer types derived from + // object or incomplete types shall not be restrict-qualified." + if ((Quals & QualType::Restrict) && !T->isIncompleteOrObjectType()) { + Diag(Loc, diag::err_typecheck_invalid_restrict_invalid_pointee) + << T; + Quals &= ~QualType::Restrict; + } + + // Build the pointer type. + return Context.getPointerType(T).getQualifiedType(Quals); +} + +/// \brief Build a reference type. +/// +/// \param T The type to which we'll be building a reference. +/// +/// \param Quals The cvr-qualifiers to be applied to the reference type. +/// +/// \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 LValueRef, unsigned Quals, + SourceLocation Loc, DeclarationName Entity) { + if (LValueRef) { + if (const RValueReferenceType *R = T->getAsRValueReferenceType()) { + // C++0x [dcl.typedef]p9: If a typedef TD names a type that is a + // reference to a type T, and attempt to create the type "lvalue + // reference to cv TD" creates the type "lvalue reference to T". + // We use the qualifiers (restrict or none) of the original reference, + // not the new ones. This is consistent with GCC. + return Context.getLValueReferenceType(R->getPointeeType()). + getQualifiedType(T.getCVRQualifiers()); + } + } + if (T->isReferenceType()) { + // 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::ParserDeclaratorInternal diagnoses the case where + // references are written directly; here, we handle the + // collapsing of references-to-references as described in C++ + // DR 106 and amended by C++ DR 540. + return T; + } + + // 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(); + } + + // Enforce C99 6.7.3p2: "Types other than pointer types derived from + // object or incomplete types shall not be restrict-qualified." + if ((Quals & QualType::Restrict) && !T->isIncompleteOrObjectType()) { + Diag(Loc, diag::err_typecheck_invalid_restrict_invalid_pointee) + << T; + Quals &= ~QualType::Restrict; + } + + // 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. + // + // We diagnose extraneous cv-qualifiers for the non-typedef, + // non-template type argument case within the parser. Here, we just + // ignore any extraneous cv-qualifiers. + Quals &= ~QualType::Const; + Quals &= ~QualType::Volatile; + + // Handle restrict on references. + if (LValueRef) + return Context.getLValueReferenceType(T).getQualifiedType(Quals); + return Context.getRValueReferenceType(T).getQualifiedType(Quals); +} + +/// \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 Quals The cvr-qualifiers to be applied to the array's +/// element type. +/// +/// \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, + SourceLocation Loc, DeclarationName Entity) { + // 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); + return QualType(); + } + + // C++ 8.3.2p4: There shall be no ... arrays of references ... + if (T->isReferenceType()) { + Diag(Loc, diag::err_illegal_decl_array_of_references) + << getPrintableNameForEntity(Entity); + return QualType(); + } + + if (const RecordType *EltTy = T->getAsRecordType()) { + // 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->isObjCInterfaceType()) { + Diag(Loc, diag::err_objc_array_of_interfaces) << T; + return QualType(); + } + + // C99 6.7.5.2p1: The size expression shall have integer type. + if (ArraySize && !ArraySize->isTypeDependent() && + !ArraySize->getType()->isIntegerType()) { + Diag(ArraySize->getLocStart(), diag::err_array_size_non_int) + << ArraySize->getType() << ArraySize->getSourceRange(); + ArraySize->Destroy(Context); + return QualType(); + } + llvm::APSInt ConstVal(32); + if (!ArraySize) { + if (ASM == ArrayType::Star) + T = Context.getVariableArrayType(T, 0, ASM, Quals); + else + T = Context.getIncompleteArrayType(T, ASM, Quals); + } else if (ArraySize->isValueDependent()) { + T = Context.getDependentSizedArrayType(T, ArraySize, ASM, Quals); + } else if (!ArraySize->isIntegerConstantExpr(ConstVal, Context) || + (!T->isDependentType() && !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); + } else { + // C99 6.7.5.2p1: If the expression is a constant expression, it shall + // have a value greater than zero. + if (ConstVal.isSigned()) { + if (ConstVal.isNegative()) { + Diag(ArraySize->getLocStart(), + diag::err_typecheck_negative_array_size) + << ArraySize->getSourceRange(); + return QualType(); + } else if (ConstVal == 0) { + // GCC accepts zero sized static arrays. + Diag(ArraySize->getLocStart(), diag::ext_typecheck_zero_array_size) + << 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 (ArraySize && !ArraySize->isTypeDependent() && + !ArraySize->isValueDependent() && + !ArraySize->isIntegerConstantExpr(Context)) + Diag(Loc, diag::ext_vla); + else if (ASM != ArrayType::Normal || Quals != 0) + Diag(Loc, diag::ext_c99_array_usage); + } + + return T; +} + +/// \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, + SourceLocation Loc, DeclarationName Entity) { + if (T->isArrayType() || T->isFunctionType()) { + Diag(Loc, diag::err_func_returning_array_function) << 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(); + + return Context.getFunctionType(T, ParamTypes, NumParamTypes, Variadic, + Quals); +} + +/// GetTypeForDeclarator - Convert the type for the specified +/// declarator to Type instances. Skip the outermost Skip type +/// objects. +/// +/// 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. +QualType Sema::GetTypeForDeclarator(Declarator &D, Scope *S, unsigned Skip, + TagDecl **OwnedDecl) { + bool OmittedReturnType = false; + + if (D.getContext() == Declarator::BlockLiteralContext + && Skip == 0 + && !D.getDeclSpec().hasTypeSpecifier() + && (D.getNumTypeObjects() == 0 + || (D.getNumTypeObjects() == 1 + && D.getTypeObject(0).Kind == DeclaratorChunk::Function))) + OmittedReturnType = true; + + // long long is a C99 feature. + if (!getLangOptions().C99 && !getLangOptions().CPlusPlus0x && + D.getDeclSpec().getTypeSpecWidth() == DeclSpec::TSW_longlong) + Diag(D.getDeclSpec().getTypeSpecWidthLoc(), diag::ext_longlong); + + // Determine the type of the declarator. Not all forms of declarator + // have a type. + QualType T; + switch (D.getKind()) { + case Declarator::DK_Abstract: + case Declarator::DK_Normal: + case Declarator::DK_Operator: { + const DeclSpec &DS = D.getDeclSpec(); + if (OmittedReturnType) { + // We default to a dependent type initially. Can be modified by + // the first return statement. + T = Context.DependentTy; + } else { + bool isInvalid = false; + T = ConvertDeclSpecToType(DS, D.getIdentifierLoc(), isInvalid); + if (isInvalid) + D.setInvalidType(true); + else if (OwnedDecl && DS.isTypeSpecOwned()) + *OwnedDecl = cast<TagDecl>((Decl *)DS.getTypeRep()); + } + break; + } + + case Declarator::DK_Constructor: + case Declarator::DK_Destructor: + case Declarator::DK_Conversion: + // Constructors and destructors don't have return types. Use + // "void" instead. Conversion operators will check their return + // types separately. + T = Context.VoidTy; + break; + } + + // 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 = Skip, e = D.getNumTypeObjects(); i != e; ++i) { + DeclaratorChunk &DeclType = D.getTypeObject(e-i-1+Skip); + switch (DeclType.Kind) { + default: assert(0 && "Unknown decltype!"); + case DeclaratorChunk::BlockPointer: + // If blocks are disabled, emit an error. + if (!LangOpts.Blocks) + Diag(DeclType.Loc, diag::err_blocks_disable); + + if (!T.getTypePtr()->isFunctionType()) + Diag(D.getIdentifierLoc(), diag::err_nonfunction_block_type); + else + T = (Context.getBlockPointerType(T) + .getQualifiedType(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. + } + T = BuildPointerType(T, DeclType.Ptr.TypeQuals, DeclType.Loc, Name); + 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.Ref.HasRestrict ? QualType::Restrict : 0, + DeclType.Loc, Name); + 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, ATI.TypeQuals, DeclType.Loc, 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. + if (T->isArrayType() || T->isFunctionType()) { + Diag(DeclType.Loc, diag::err_func_returning_array_function) << T; + T = Context.IntTy; + D.setInvalidType(true); + } + + if (getLangOptions().CPlusPlus && D.getDeclSpec().isTypeSpecOwned()) { + // C++ [dcl.fct]p6: + // Types shall not be defined in return or parameter types. + TagDecl *Tag = cast<TagDecl>((Decl *)D.getDeclSpec().getTypeRep()); + 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 == 0) { + if (getLangOptions().CPlusPlus) { + // C++ 8.3.5p2: If the parameter-declaration-clause is empty, the + // function takes no arguments. + llvm::SmallVector<QualType, 4> Exceptions; + Exceptions.reserve(FTI.NumExceptions); + for(unsigned ei = 0, ee = FTI.NumExceptions; ei != ee; ++ei) { + QualType ET = QualType::getFromOpaquePtr(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); + } + T = Context.getFunctionType(T, NULL, 0, FTI.isVariadic, FTI.TypeQuals, + FTI.hasExceptionSpec, + FTI.hasAnyExceptionSpec, + Exceptions.size(), Exceptions.data()); + } else if (FTI.isVariadic) { + // We allow a zero-parameter variadic function in C if the + // function is marked with the "overloadable" + // attribute. Scan for this attribute now. + 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); + T = Context.getFunctionType(T, NULL, 0, FTI.isVariadic, 0); + } else { + // Simple void foo(), where the incoming T is the result type. + T = Context.getFunctionNoProtoType(T); + } + } else if (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); + } else { + // Otherwise, we have a function with an argument list that is + // potentially variadic. + llvm::SmallVector<QualType, 16> ArgTys; + + for (unsigned i = 0, e = FTI.NumArgs; i != e; ++i) { + ParmVarDecl *Param = + cast<ParmVarDecl>(FTI.ArgInfo[i].Param.getAs<Decl>()); + 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.getCVRQualifiers()) + 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.IntTy; + } else if (const BuiltinType* BTy = ArgTy->getAsBuiltinType()) { + if (BTy->getKind() == BuiltinType::Float) + ArgTy = Context.DoubleTy; + } + } + + ArgTys.push_back(ArgTy); + } + + llvm::SmallVector<QualType, 4> Exceptions; + Exceptions.reserve(FTI.NumExceptions); + for(unsigned ei = 0, ee = FTI.NumExceptions; ei != ee; ++ei) { + QualType ET = QualType::getFromOpaquePtr(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); + } + + T = Context.getFunctionType(T, ArgTys.data(), ArgTys.size(), + FTI.isVariadic, FTI.TypeQuals, + FTI.hasExceptionSpec, + FTI.hasAnyExceptionSpec, + Exceptions.size(), Exceptions.data()); + } + break; + } + case DeclaratorChunk::MemberPointer: + // 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. + } + // The scope spec must refer to a class, or be dependent. + DeclContext *DC = computeDeclContext(DeclType.Mem.Scope()); + QualType ClsType; + // FIXME: Extend for dependent types when it's actually supported. + // See ActOnCXXNestedNameSpecifier. + if (CXXRecordDecl *RD = dyn_cast_or_null<CXXRecordDecl>(DC)) { + ClsType = Context.getTagDeclType(RD); + } else { + if (DC) { + 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); + ClsType = Context.IntTy; + } + + // C++ 8.3.3p3: A pointer to member shall not pointer to ... a member + // with reference type, or "cv void." + if (T->isReferenceType()) { + Diag(DeclType.Loc, diag::err_illegal_decl_pointer_to_reference) + << (D.getIdentifier() ? D.getIdentifier()->getName() : "type name"); + D.setInvalidType(true); + T = Context.IntTy; + } + if (T->isVoidType()) { + Diag(DeclType.Loc, diag::err_illegal_decl_mempointer_to_void) + << (D.getIdentifier() ? D.getIdentifier()->getName() : "type name"); + T = Context.IntTy; + } + + // Enforce C99 6.7.3p2: "Types other than pointer types derived from + // object or incomplete types shall not be restrict-qualified." + if ((DeclType.Mem.TypeQuals & QualType::Restrict) && + !T->isIncompleteOrObjectType()) { + Diag(DeclType.Loc, diag::err_typecheck_invalid_restrict_invalid_pointee) + << T; + DeclType.Mem.TypeQuals &= ~QualType::Restrict; + } + + T = Context.getMemberPointerType(T, ClsType.getTypePtr()). + getQualifiedType(DeclType.Mem.TypeQuals); + + break; + } + + if (T.isNull()) { + D.setInvalidType(true); + T = Context.IntTy; + } + + // See if there are any attributes on this declarator chunk. + if (const AttributeList *AL = DeclType.getAttrs()) + ProcessTypeAttributeList(T, AL); + } + + if (getLangOptions().CPlusPlus && T->isFunctionType()) { + const FunctionProtoType *FnTy = T->getAsFunctionProtoType(); + 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. + if (FnTy->getTypeQuals() != 0 && + D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_typedef && + ((D.getContext() != Declarator::MemberContext && + (!D.getCXXScopeSpec().isSet() || + !computeDeclContext(D.getCXXScopeSpec())->isRecord())) || + D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_static)) { + if (D.isFunctionDeclarator()) + Diag(D.getIdentifierLoc(), diag::err_invalid_qualified_function_type); + else + Diag(D.getIdentifierLoc(), + diag::err_invalid_qualified_typedef_function_type_use); + + // Strip the cv-quals from the type. + T = Context.getFunctionType(FnTy->getResultType(), FnTy->arg_type_begin(), + FnTy->getNumArgs(), FnTy->isVariadic(), 0); + } + } + + // If there were any type attributes applied to the decl itself (not the + // type, apply the type attribute to the type!) + if (const AttributeList *Attrs = D.getAttributes()) + ProcessTypeAttributeList(T, Attrs); + + return T; +} + +/// CheckSpecifiedExceptionType - Check if the given type is valid in an +/// exception specification. Incomplete types, or pointers to incomplete types +/// other than void are not allowed. +bool Sema::CheckSpecifiedExceptionType(QualType T, const SourceRange &Range) { + // FIXME: This may not correctly work with the fix for core issue 437, + // where a class's own type is considered complete within its body. + + // C++ 15.4p2: A type denoted in an exception-specification shall not denote + // an incomplete type. + if (T->isIncompleteType()) + return Diag(Range.getBegin(), diag::err_incomplete_in_exception_spec) + << Range << T << /*direct*/0; + + // C++ 15.4p2: A type denoted in an exception-specification shall not denote + // an incomplete type a pointer or reference to an incomplete type, other + // than (cv) void*. + int kind; + if (const PointerType* IT = T->getAsPointerType()) { + T = IT->getPointeeType(); + kind = 1; + } else if (const ReferenceType* IT = T->getAsReferenceType()) { + T = IT->getPointeeType(); + kind = 2; + } else + return false; + + if (T->isIncompleteType() && !T->isVoidType()) + return Diag(Range.getBegin(), diag::err_incomplete_in_exception_spec) + << Range << T << /*indirect*/kind; + + return false; +} + +/// CheckDistantExceptionSpec - Check if the given type is a pointer or pointer +/// to member to a function with an exception specification. This means that +/// it is invalid to add another level of indirection. +bool Sema::CheckDistantExceptionSpec(QualType T) { + if (const PointerType *PT = T->getAsPointerType()) + T = PT->getPointeeType(); + else if (const MemberPointerType *PT = T->getAsMemberPointerType()) + T = PT->getPointeeType(); + else + return false; + + const FunctionProtoType *FnT = T->getAsFunctionProtoType(); + if (!FnT) + return false; + + return FnT->hasExceptionSpec(); +} + +/// ObjCGetTypeForMethodDefinition - Builds the type for a method definition +/// declarator +QualType Sema::ObjCGetTypeForMethodDefinition(DeclPtrTy D) { + ObjCMethodDecl *MDecl = cast<ObjCMethodDecl>(D.getAs<Decl>()); + QualType T = MDecl->getResultType(); + llvm::SmallVector<QualType, 16> ArgTys; + + // Add the first two invisible argument types for self and _cmd. + if (MDecl->isInstanceMethod()) { + QualType selfTy = Context.getObjCInterfaceType(MDecl->getClassInterface()); + selfTy = Context.getPointerType(selfTy); + ArgTys.push_back(selfTy); + } else + ArgTys.push_back(Context.getObjCIdType()); + ArgTys.push_back(Context.getObjCSelType()); + + for (ObjCMethodDecl::param_iterator PI = MDecl->param_begin(), + E = MDecl->param_end(); PI != E; ++PI) { + QualType ArgTy = (*PI)->getType(); + assert(!ArgTy.isNull() && "Couldn't parse type?"); + ArgTy = adjustParameterType(ArgTy); + ArgTys.push_back(ArgTy); + } + T = Context.getFunctionType(T, &ArgTys[0], ArgTys.size(), + MDecl->isVariadic(), 0); + return T; +} + +/// UnwrapSimilarPointerTypes - If T1 and T2 are pointer types that +/// may be similar (C++ 4.4), replaces T1 and T2 with the type that +/// they point to and return true. If T1 and T2 aren't pointer types +/// or pointer-to-member types, or if they are not similar at this +/// level, returns false and leaves T1 and T2 unchanged. Top-level +/// qualifiers on T1 and T2 are ignored. This function will typically +/// be called in a loop that successively "unwraps" pointer and +/// pointer-to-member types to compare them at each level. +bool Sema::UnwrapSimilarPointerTypes(QualType& T1, QualType& T2) { + const PointerType *T1PtrType = T1->getAsPointerType(), + *T2PtrType = T2->getAsPointerType(); + if (T1PtrType && T2PtrType) { + T1 = T1PtrType->getPointeeType(); + T2 = T2PtrType->getPointeeType(); + return true; + } + + const MemberPointerType *T1MPType = T1->getAsMemberPointerType(), + *T2MPType = T2->getAsMemberPointerType(); + if (T1MPType && T2MPType && + Context.getCanonicalType(T1MPType->getClass()) == + Context.getCanonicalType(T2MPType->getClass())) { + T1 = T1MPType->getPointeeType(); + T2 = T2MPType->getPointeeType(); + return true; + } + return false; +} + +Sema::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; + QualType T = GetTypeForDeclarator(D, S, /*Skip=*/0, &OwnedTag); + 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 T.getAsOpaquePtr(); +} + + + +//===----------------------------------------------------------------------===// +// 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); + return; + } + + // Check the attribute arguments. + if (Attr.getNumArgs() != 1) { + S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1; + return; + } + Expr *ASArgExpr = static_cast<Expr *>(Attr.getArg(0)); + llvm::APSInt addrSpace(32); + if (!ASArgExpr->isIntegerConstantExpr(addrSpace, S.Context)) { + S.Diag(Attr.getLoc(), diag::err_attribute_address_space_not_int) + << ASArgExpr->getSourceRange(); + return; + } + + unsigned ASIdx = static_cast<unsigned>(addrSpace.getZExtValue()); + Type = S.Context.getAddrSpaceQualType(Type, ASIdx); +} + +/// HandleObjCGCTypeAttribute - Process an objc's gc attribute on the +/// specified type. The attribute contains 1 argument, weak or strong. +static void HandleObjCGCTypeAttribute(QualType &Type, + const AttributeList &Attr, Sema &S) { + if (Type.getObjCGCAttr() != QualType::GCNone) { + S.Diag(Attr.getLoc(), diag::err_attribute_multiple_objc_gc); + return; + } + + // Check the attribute arguments. + if (!Attr.getParameterName()) { + S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_string) + << "objc_gc" << 1; + return; + } + QualType::GCAttrTypes GCAttr; + if (Attr.getNumArgs() != 0) { + S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1; + return; + } + if (Attr.getParameterName()->isStr("weak")) + GCAttr = QualType::Weak; + else if (Attr.getParameterName()->isStr("strong")) + GCAttr = QualType::Strong; + else { + S.Diag(Attr.getLoc(), diag::warn_attribute_type_not_supported) + << "objc_gc" << Attr.getParameterName(); + return; + } + + Type = S.Context.getObjCGCQualType(Type, GCAttr); +} + +void Sema::ProcessTypeAttributeList(QualType &Result, const AttributeList *AL) { + // 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. + for (; AL; AL = AL->getNext()) { + // If this is an attribute we can handle, do so now, otherwise, add it to + // the LeftOverAttrs list for rechaining. + switch (AL->getKind()) { + default: break; + case AttributeList::AT_address_space: + HandleAddressSpaceTypeAttribute(Result, *AL, *this); + break; + case AttributeList::AT_objc_gc: + HandleObjCGCTypeAttribute(Result, *AL, *this); + break; + } + } +} + +/// @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 diag The diagnostic value (e.g., +/// @c diag::err_typecheck_decl_incomplete_type) that will be used +/// for the error message if @p T is incomplete. +/// +/// @param Range1 An optional range in the source code that will be a +/// part of the "incomplete type" error message. +/// +/// @param Range2 An optional range in the source code that will be a +/// part of the "incomplete type" error message. +/// +/// @param PrintType If non-NULL, the type that should be printed +/// instead of @p T. This parameter should be used when the type that +/// we're checking for incompleteness isn't the type that should be +/// displayed to the user, e.g., when T is a type and PrintType is a +/// pointer to T. +/// +/// @returns @c true if @p T is incomplete and a diagnostic was emitted, +/// @c false otherwise. +bool Sema::RequireCompleteType(SourceLocation Loc, QualType T, unsigned diag, + SourceRange Range1, SourceRange Range2, + QualType PrintType) { + // 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, try to instantiate it. + if (const RecordType *Record = T->getAsRecordType()) { + if (ClassTemplateSpecializationDecl *ClassTemplateSpec + = dyn_cast<ClassTemplateSpecializationDecl>(Record->getDecl())) { + if (ClassTemplateSpec->getSpecializationKind() == TSK_Undeclared) { + // Update the class template specialization's location to + // refer to the point of instantiation. + if (Loc.isValid()) + ClassTemplateSpec->setLocation(Loc); + return InstantiateClassTemplateSpecialization(ClassTemplateSpec, + /*ExplicitInstantiation=*/false); + } + } else if (CXXRecordDecl *Rec + = dyn_cast<CXXRecordDecl>(Record->getDecl())) { + if (CXXRecordDecl *Pattern = Rec->getInstantiatedFromMemberClass()) { + // Find the class template specialization that surrounds this + // member class. + ClassTemplateSpecializationDecl *Spec = 0; + for (DeclContext *Parent = Rec->getDeclContext(); + Parent && !Spec; Parent = Parent->getParent()) + Spec = dyn_cast<ClassTemplateSpecializationDecl>(Parent); + assert(Spec && "Not a member of a class template specialization?"); + return InstantiateClass(Loc, Rec, Pattern, Spec->getTemplateArgs(), + /*ExplicitInstantiation=*/false); + } + } + } + + if (PrintType.isNull()) + PrintType = T; + + // We have an incomplete type. Produce a diagnostic. + Diag(Loc, diag) << PrintType << Range1 << Range2; + + // If the type was a forward declaration of a class/struct/union + // type, produce + const TagType *Tag = 0; + if (const RecordType *Record = T->getAsRecordType()) + Tag = Record; + else if (const EnumType *Enum = T->getAsEnumType()) + Tag = Enum; + + 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; +} + +/// \brief Retrieve a version of the type 'T' that is qualified by the +/// nested-name-specifier contained in SS. +QualType Sema::getQualifiedNameType(const CXXScopeSpec &SS, QualType T) { + if (!SS.isSet() || SS.isInvalid() || T.isNull()) + return T; + + NestedNameSpecifier *NNS + = static_cast<NestedNameSpecifier *>(SS.getScopeRep()); + return Context.getQualifiedNameType(NNS, T); +} |
