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Diffstat (limited to 'clang/lib/Sema/DeclSpec.cpp')
| -rw-r--r-- | clang/lib/Sema/DeclSpec.cpp | 986 |
1 files changed, 986 insertions, 0 deletions
diff --git a/clang/lib/Sema/DeclSpec.cpp b/clang/lib/Sema/DeclSpec.cpp new file mode 100644 index 0000000..b531acc --- /dev/null +++ b/clang/lib/Sema/DeclSpec.cpp @@ -0,0 +1,986 @@ +//===--- SemaDeclSpec.cpp - Declaration Specifier Semantic Analysis -------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file implements semantic analysis for declaration specifiers. +// +//===----------------------------------------------------------------------===// + +#include "clang/Parse/ParseDiagnostic.h" // FIXME: remove this back-dependency! +#include "clang/Sema/DeclSpec.h" +#include "clang/Sema/LocInfoType.h" +#include "clang/Sema/ParsedTemplate.h" +#include "clang/Sema/SemaDiagnostic.h" +#include "clang/Sema/Sema.h" +#include "clang/AST/ASTContext.h" +#include "clang/AST/Expr.h" +#include "clang/AST/NestedNameSpecifier.h" +#include "clang/AST/TypeLoc.h" +#include "clang/Lex/Preprocessor.h" +#include "clang/Basic/LangOptions.h" +#include "llvm/ADT/STLExtras.h" +#include "llvm/Support/ErrorHandling.h" +#include <cstring> +using namespace clang; + + +static DiagnosticBuilder Diag(DiagnosticsEngine &D, SourceLocation Loc, + unsigned DiagID) { + return D.Report(Loc, DiagID); +} + + +void UnqualifiedId::setTemplateId(TemplateIdAnnotation *TemplateId) { + assert(TemplateId && "NULL template-id annotation?"); + Kind = IK_TemplateId; + this->TemplateId = TemplateId; + StartLocation = TemplateId->TemplateNameLoc; + EndLocation = TemplateId->RAngleLoc; +} + +void UnqualifiedId::setConstructorTemplateId(TemplateIdAnnotation *TemplateId) { + assert(TemplateId && "NULL template-id annotation?"); + Kind = IK_ConstructorTemplateId; + this->TemplateId = TemplateId; + StartLocation = TemplateId->TemplateNameLoc; + EndLocation = TemplateId->RAngleLoc; +} + +void CXXScopeSpec::Extend(ASTContext &Context, SourceLocation TemplateKWLoc, + TypeLoc TL, SourceLocation ColonColonLoc) { + Builder.Extend(Context, TemplateKWLoc, TL, ColonColonLoc); + if (Range.getBegin().isInvalid()) + Range.setBegin(TL.getBeginLoc()); + Range.setEnd(ColonColonLoc); + + assert(Range == Builder.getSourceRange() && + "NestedNameSpecifierLoc range computation incorrect"); +} + +void CXXScopeSpec::Extend(ASTContext &Context, IdentifierInfo *Identifier, + SourceLocation IdentifierLoc, + SourceLocation ColonColonLoc) { + Builder.Extend(Context, Identifier, IdentifierLoc, ColonColonLoc); + + if (Range.getBegin().isInvalid()) + Range.setBegin(IdentifierLoc); + Range.setEnd(ColonColonLoc); + + assert(Range == Builder.getSourceRange() && + "NestedNameSpecifierLoc range computation incorrect"); +} + +void CXXScopeSpec::Extend(ASTContext &Context, NamespaceDecl *Namespace, + SourceLocation NamespaceLoc, + SourceLocation ColonColonLoc) { + Builder.Extend(Context, Namespace, NamespaceLoc, ColonColonLoc); + + if (Range.getBegin().isInvalid()) + Range.setBegin(NamespaceLoc); + Range.setEnd(ColonColonLoc); + + assert(Range == Builder.getSourceRange() && + "NestedNameSpecifierLoc range computation incorrect"); +} + +void CXXScopeSpec::Extend(ASTContext &Context, NamespaceAliasDecl *Alias, + SourceLocation AliasLoc, + SourceLocation ColonColonLoc) { + Builder.Extend(Context, Alias, AliasLoc, ColonColonLoc); + + if (Range.getBegin().isInvalid()) + Range.setBegin(AliasLoc); + Range.setEnd(ColonColonLoc); + + assert(Range == Builder.getSourceRange() && + "NestedNameSpecifierLoc range computation incorrect"); +} + +void CXXScopeSpec::MakeGlobal(ASTContext &Context, + SourceLocation ColonColonLoc) { + Builder.MakeGlobal(Context, ColonColonLoc); + + Range = SourceRange(ColonColonLoc); + + assert(Range == Builder.getSourceRange() && + "NestedNameSpecifierLoc range computation incorrect"); +} + +void CXXScopeSpec::MakeTrivial(ASTContext &Context, + NestedNameSpecifier *Qualifier, SourceRange R) { + Builder.MakeTrivial(Context, Qualifier, R); + Range = R; +} + +void CXXScopeSpec::Adopt(NestedNameSpecifierLoc Other) { + if (!Other) { + Range = SourceRange(); + Builder.Clear(); + return; + } + + Range = Other.getSourceRange(); + Builder.Adopt(Other); +} + +SourceLocation CXXScopeSpec::getLastQualifierNameLoc() const { + if (!Builder.getRepresentation()) + return SourceLocation(); + return Builder.getTemporary().getLocalBeginLoc(); +} + +NestedNameSpecifierLoc +CXXScopeSpec::getWithLocInContext(ASTContext &Context) const { + if (!Builder.getRepresentation()) + return NestedNameSpecifierLoc(); + + return Builder.getWithLocInContext(Context); +} + +/// DeclaratorChunk::getFunction - Return a DeclaratorChunk for a function. +/// "TheDeclarator" is the declarator that this will be added to. +DeclaratorChunk DeclaratorChunk::getFunction(bool hasProto, bool isVariadic, + SourceLocation EllipsisLoc, + ParamInfo *ArgInfo, + unsigned NumArgs, + unsigned TypeQuals, + bool RefQualifierIsLvalueRef, + SourceLocation RefQualifierLoc, + SourceLocation ConstQualifierLoc, + SourceLocation + VolatileQualifierLoc, + SourceLocation MutableLoc, + ExceptionSpecificationType + ESpecType, + SourceLocation ESpecLoc, + ParsedType *Exceptions, + SourceRange *ExceptionRanges, + unsigned NumExceptions, + Expr *NoexceptExpr, + SourceLocation LocalRangeBegin, + SourceLocation LocalRangeEnd, + Declarator &TheDeclarator, + ParsedType TrailingReturnType) { + DeclaratorChunk I; + I.Kind = Function; + I.Loc = LocalRangeBegin; + I.EndLoc = LocalRangeEnd; + I.Fun.AttrList = 0; + I.Fun.hasPrototype = hasProto; + I.Fun.isVariadic = isVariadic; + I.Fun.EllipsisLoc = EllipsisLoc.getRawEncoding(); + I.Fun.DeleteArgInfo = false; + I.Fun.TypeQuals = TypeQuals; + I.Fun.NumArgs = NumArgs; + I.Fun.ArgInfo = 0; + I.Fun.RefQualifierIsLValueRef = RefQualifierIsLvalueRef; + I.Fun.RefQualifierLoc = RefQualifierLoc.getRawEncoding(); + I.Fun.ConstQualifierLoc = ConstQualifierLoc.getRawEncoding(); + I.Fun.VolatileQualifierLoc = VolatileQualifierLoc.getRawEncoding(); + I.Fun.MutableLoc = MutableLoc.getRawEncoding(); + I.Fun.ExceptionSpecType = ESpecType; + I.Fun.ExceptionSpecLoc = ESpecLoc.getRawEncoding(); + I.Fun.NumExceptions = 0; + I.Fun.Exceptions = 0; + I.Fun.NoexceptExpr = 0; + I.Fun.TrailingReturnType = TrailingReturnType.getAsOpaquePtr(); + + // new[] an argument array if needed. + if (NumArgs) { + // If the 'InlineParams' in Declarator is unused and big enough, put our + // parameter list there (in an effort to avoid new/delete traffic). If it + // is already used (consider a function returning a function pointer) or too + // small (function taking too many arguments), go to the heap. + if (!TheDeclarator.InlineParamsUsed && + NumArgs <= llvm::array_lengthof(TheDeclarator.InlineParams)) { + I.Fun.ArgInfo = TheDeclarator.InlineParams; + I.Fun.DeleteArgInfo = false; + TheDeclarator.InlineParamsUsed = true; + } else { + I.Fun.ArgInfo = new DeclaratorChunk::ParamInfo[NumArgs]; + I.Fun.DeleteArgInfo = true; + } + memcpy(I.Fun.ArgInfo, ArgInfo, sizeof(ArgInfo[0])*NumArgs); + } + + // Check what exception specification information we should actually store. + switch (ESpecType) { + default: break; // By default, save nothing. + case EST_Dynamic: + // new[] an exception array if needed + if (NumExceptions) { + I.Fun.NumExceptions = NumExceptions; + I.Fun.Exceptions = new DeclaratorChunk::TypeAndRange[NumExceptions]; + for (unsigned i = 0; i != NumExceptions; ++i) { + I.Fun.Exceptions[i].Ty = Exceptions[i]; + I.Fun.Exceptions[i].Range = ExceptionRanges[i]; + } + } + break; + + case EST_ComputedNoexcept: + I.Fun.NoexceptExpr = NoexceptExpr; + break; + } + return I; +} + +bool Declarator::isDeclarationOfFunction() const { + for (unsigned i = 0, i_end = DeclTypeInfo.size(); i < i_end; ++i) { + switch (DeclTypeInfo[i].Kind) { + case DeclaratorChunk::Function: + return true; + case DeclaratorChunk::Paren: + continue; + case DeclaratorChunk::Pointer: + case DeclaratorChunk::Reference: + case DeclaratorChunk::Array: + case DeclaratorChunk::BlockPointer: + case DeclaratorChunk::MemberPointer: + return false; + } + llvm_unreachable("Invalid type chunk"); + } + + switch (DS.getTypeSpecType()) { + case TST_atomic: + case TST_auto: + case TST_bool: + case TST_char: + case TST_char16: + case TST_char32: + case TST_class: + case TST_decimal128: + case TST_decimal32: + case TST_decimal64: + case TST_double: + case TST_enum: + case TST_error: + case TST_float: + case TST_half: + case TST_int: + case TST_int128: + case TST_struct: + case TST_union: + case TST_unknown_anytype: + case TST_unspecified: + case TST_void: + case TST_wchar: + return false; + + case TST_decltype: + case TST_typeofExpr: + if (Expr *E = DS.getRepAsExpr()) + return E->getType()->isFunctionType(); + return false; + + case TST_underlyingType: + case TST_typename: + case TST_typeofType: { + QualType QT = DS.getRepAsType().get(); + if (QT.isNull()) + return false; + + if (const LocInfoType *LIT = dyn_cast<LocInfoType>(QT)) + QT = LIT->getType(); + + if (QT.isNull()) + return false; + + return QT->isFunctionType(); + } + } + + llvm_unreachable("Invalid TypeSpecType!"); +} + +/// getParsedSpecifiers - Return a bitmask of which flavors of specifiers this +/// declaration specifier includes. +/// +unsigned DeclSpec::getParsedSpecifiers() const { + unsigned Res = 0; + if (StorageClassSpec != SCS_unspecified || + SCS_thread_specified) + Res |= PQ_StorageClassSpecifier; + + if (TypeQualifiers != TQ_unspecified) + Res |= PQ_TypeQualifier; + + if (hasTypeSpecifier()) + Res |= PQ_TypeSpecifier; + + if (FS_inline_specified || FS_virtual_specified || FS_explicit_specified) + Res |= PQ_FunctionSpecifier; + return Res; +} + +template <class T> static bool BadSpecifier(T TNew, T TPrev, + const char *&PrevSpec, + unsigned &DiagID) { + PrevSpec = DeclSpec::getSpecifierName(TPrev); + DiagID = (TNew == TPrev ? diag::ext_duplicate_declspec + : diag::err_invalid_decl_spec_combination); + return true; +} + +const char *DeclSpec::getSpecifierName(DeclSpec::SCS S) { + switch (S) { + case DeclSpec::SCS_unspecified: return "unspecified"; + case DeclSpec::SCS_typedef: return "typedef"; + case DeclSpec::SCS_extern: return "extern"; + case DeclSpec::SCS_static: return "static"; + case DeclSpec::SCS_auto: return "auto"; + case DeclSpec::SCS_register: return "register"; + case DeclSpec::SCS_private_extern: return "__private_extern__"; + case DeclSpec::SCS_mutable: return "mutable"; + } + llvm_unreachable("Unknown typespec!"); +} + +const char *DeclSpec::getSpecifierName(TSW W) { + switch (W) { + case TSW_unspecified: return "unspecified"; + case TSW_short: return "short"; + case TSW_long: return "long"; + case TSW_longlong: return "long long"; + } + llvm_unreachable("Unknown typespec!"); +} + +const char *DeclSpec::getSpecifierName(TSC C) { + switch (C) { + case TSC_unspecified: return "unspecified"; + case TSC_imaginary: return "imaginary"; + case TSC_complex: return "complex"; + } + llvm_unreachable("Unknown typespec!"); +} + + +const char *DeclSpec::getSpecifierName(TSS S) { + switch (S) { + case TSS_unspecified: return "unspecified"; + case TSS_signed: return "signed"; + case TSS_unsigned: return "unsigned"; + } + llvm_unreachable("Unknown typespec!"); +} + +const char *DeclSpec::getSpecifierName(DeclSpec::TST T) { + switch (T) { + case DeclSpec::TST_unspecified: return "unspecified"; + case DeclSpec::TST_void: return "void"; + case DeclSpec::TST_char: return "char"; + case DeclSpec::TST_wchar: return "wchar_t"; + case DeclSpec::TST_char16: return "char16_t"; + case DeclSpec::TST_char32: return "char32_t"; + case DeclSpec::TST_int: return "int"; + case DeclSpec::TST_int128: return "__int128"; + case DeclSpec::TST_half: return "half"; + case DeclSpec::TST_float: return "float"; + case DeclSpec::TST_double: return "double"; + case DeclSpec::TST_bool: return "_Bool"; + case DeclSpec::TST_decimal32: return "_Decimal32"; + case DeclSpec::TST_decimal64: return "_Decimal64"; + case DeclSpec::TST_decimal128: return "_Decimal128"; + case DeclSpec::TST_enum: return "enum"; + case DeclSpec::TST_class: return "class"; + case DeclSpec::TST_union: return "union"; + case DeclSpec::TST_struct: return "struct"; + case DeclSpec::TST_typename: return "type-name"; + case DeclSpec::TST_typeofType: + case DeclSpec::TST_typeofExpr: return "typeof"; + case DeclSpec::TST_auto: return "auto"; + case DeclSpec::TST_decltype: return "(decltype)"; + case DeclSpec::TST_underlyingType: return "__underlying_type"; + case DeclSpec::TST_unknown_anytype: return "__unknown_anytype"; + case DeclSpec::TST_atomic: return "_Atomic"; + case DeclSpec::TST_error: return "(error)"; + } + llvm_unreachable("Unknown typespec!"); +} + +const char *DeclSpec::getSpecifierName(TQ T) { + switch (T) { + case DeclSpec::TQ_unspecified: return "unspecified"; + case DeclSpec::TQ_const: return "const"; + case DeclSpec::TQ_restrict: return "restrict"; + case DeclSpec::TQ_volatile: return "volatile"; + } + llvm_unreachable("Unknown typespec!"); +} + +bool DeclSpec::SetStorageClassSpec(Sema &S, SCS SC, SourceLocation Loc, + const char *&PrevSpec, + unsigned &DiagID) { + // OpenCL 1.1 6.8g: "The extern, static, auto and register storage-class + // specifiers are not supported." + // It seems sensible to prohibit private_extern too + // The cl_clang_storage_class_specifiers extension enables support for + // these storage-class specifiers. + if (S.getLangOpts().OpenCL && + !S.getOpenCLOptions().cl_clang_storage_class_specifiers) { + switch (SC) { + case SCS_extern: + case SCS_private_extern: + case SCS_auto: + case SCS_register: + case SCS_static: + DiagID = diag::err_not_opencl_storage_class_specifier; + PrevSpec = getSpecifierName(SC); + return true; + default: + break; + } + } + + if (StorageClassSpec != SCS_unspecified) { + // Maybe this is an attempt to use C++0x 'auto' outside of C++0x mode. + bool isInvalid = true; + if (TypeSpecType == TST_unspecified && S.getLangOpts().CPlusPlus) { + if (SC == SCS_auto) + return SetTypeSpecType(TST_auto, Loc, PrevSpec, DiagID); + if (StorageClassSpec == SCS_auto) { + isInvalid = SetTypeSpecType(TST_auto, StorageClassSpecLoc, + PrevSpec, DiagID); + assert(!isInvalid && "auto SCS -> TST recovery failed"); + } + } + + // Changing storage class is allowed only if the previous one + // was the 'extern' that is part of a linkage specification and + // the new storage class is 'typedef'. + if (isInvalid && + !(SCS_extern_in_linkage_spec && + StorageClassSpec == SCS_extern && + SC == SCS_typedef)) + return BadSpecifier(SC, (SCS)StorageClassSpec, PrevSpec, DiagID); + } + StorageClassSpec = SC; + StorageClassSpecLoc = Loc; + assert((unsigned)SC == StorageClassSpec && "SCS constants overflow bitfield"); + return false; +} + +bool DeclSpec::SetStorageClassSpecThread(SourceLocation Loc, + const char *&PrevSpec, + unsigned &DiagID) { + if (SCS_thread_specified) { + PrevSpec = "__thread"; + DiagID = diag::ext_duplicate_declspec; + return true; + } + SCS_thread_specified = true; + SCS_threadLoc = Loc; + return false; +} + +/// These methods set the specified attribute of the DeclSpec, but return true +/// and ignore the request if invalid (e.g. "extern" then "auto" is +/// specified). +bool DeclSpec::SetTypeSpecWidth(TSW W, SourceLocation Loc, + const char *&PrevSpec, + unsigned &DiagID) { + // Overwrite TSWLoc only if TypeSpecWidth was unspecified, so that + // for 'long long' we will keep the source location of the first 'long'. + if (TypeSpecWidth == TSW_unspecified) + TSWLoc = Loc; + // Allow turning long -> long long. + else if (W != TSW_longlong || TypeSpecWidth != TSW_long) + return BadSpecifier(W, (TSW)TypeSpecWidth, PrevSpec, DiagID); + TypeSpecWidth = W; + if (TypeAltiVecVector && !TypeAltiVecBool && + ((TypeSpecWidth == TSW_long) || (TypeSpecWidth == TSW_longlong))) { + PrevSpec = DeclSpec::getSpecifierName((TST) TypeSpecType); + DiagID = diag::warn_vector_long_decl_spec_combination; + return true; + } + return false; +} + +bool DeclSpec::SetTypeSpecComplex(TSC C, SourceLocation Loc, + const char *&PrevSpec, + unsigned &DiagID) { + if (TypeSpecComplex != TSC_unspecified) + return BadSpecifier(C, (TSC)TypeSpecComplex, PrevSpec, DiagID); + TypeSpecComplex = C; + TSCLoc = Loc; + return false; +} + +bool DeclSpec::SetTypeSpecSign(TSS S, SourceLocation Loc, + const char *&PrevSpec, + unsigned &DiagID) { + if (TypeSpecSign != TSS_unspecified) + return BadSpecifier(S, (TSS)TypeSpecSign, PrevSpec, DiagID); + TypeSpecSign = S; + TSSLoc = Loc; + return false; +} + +bool DeclSpec::SetTypeSpecType(TST T, SourceLocation Loc, + const char *&PrevSpec, + unsigned &DiagID, + ParsedType Rep) { + return SetTypeSpecType(T, Loc, Loc, PrevSpec, DiagID, Rep); +} + +bool DeclSpec::SetTypeSpecType(TST T, SourceLocation TagKwLoc, + SourceLocation TagNameLoc, + const char *&PrevSpec, + unsigned &DiagID, + ParsedType Rep) { + assert(isTypeRep(T) && "T does not store a type"); + assert(Rep && "no type provided!"); + if (TypeSpecType != TST_unspecified) { + PrevSpec = DeclSpec::getSpecifierName((TST) TypeSpecType); + DiagID = diag::err_invalid_decl_spec_combination; + return true; + } + TypeSpecType = T; + TypeRep = Rep; + TSTLoc = TagKwLoc; + TSTNameLoc = TagNameLoc; + TypeSpecOwned = false; + return false; +} + +bool DeclSpec::SetTypeSpecType(TST T, SourceLocation Loc, + const char *&PrevSpec, + unsigned &DiagID, + Expr *Rep) { + assert(isExprRep(T) && "T does not store an expr"); + assert(Rep && "no expression provided!"); + if (TypeSpecType != TST_unspecified) { + PrevSpec = DeclSpec::getSpecifierName((TST) TypeSpecType); + DiagID = diag::err_invalid_decl_spec_combination; + return true; + } + TypeSpecType = T; + ExprRep = Rep; + TSTLoc = Loc; + TSTNameLoc = Loc; + TypeSpecOwned = false; + return false; +} + +bool DeclSpec::SetTypeSpecType(TST T, SourceLocation Loc, + const char *&PrevSpec, + unsigned &DiagID, + Decl *Rep, bool Owned) { + return SetTypeSpecType(T, Loc, Loc, PrevSpec, DiagID, Rep, Owned); +} + +bool DeclSpec::SetTypeSpecType(TST T, SourceLocation TagKwLoc, + SourceLocation TagNameLoc, + const char *&PrevSpec, + unsigned &DiagID, + Decl *Rep, bool Owned) { + assert(isDeclRep(T) && "T does not store a decl"); + // Unlike the other cases, we don't assert that we actually get a decl. + + if (TypeSpecType != TST_unspecified) { + PrevSpec = DeclSpec::getSpecifierName((TST) TypeSpecType); + DiagID = diag::err_invalid_decl_spec_combination; + return true; + } + TypeSpecType = T; + DeclRep = Rep; + TSTLoc = TagKwLoc; + TSTNameLoc = TagNameLoc; + TypeSpecOwned = Owned; + return false; +} + +bool DeclSpec::SetTypeSpecType(TST T, SourceLocation Loc, + const char *&PrevSpec, + unsigned &DiagID) { + assert(!isDeclRep(T) && !isTypeRep(T) && !isExprRep(T) && + "rep required for these type-spec kinds!"); + if (TypeSpecType != TST_unspecified) { + PrevSpec = DeclSpec::getSpecifierName((TST) TypeSpecType); + DiagID = diag::err_invalid_decl_spec_combination; + return true; + } + TSTLoc = Loc; + TSTNameLoc = Loc; + if (TypeAltiVecVector && (T == TST_bool) && !TypeAltiVecBool) { + TypeAltiVecBool = true; + return false; + } + TypeSpecType = T; + TypeSpecOwned = false; + if (TypeAltiVecVector && !TypeAltiVecBool && (TypeSpecType == TST_double)) { + PrevSpec = DeclSpec::getSpecifierName((TST) TypeSpecType); + DiagID = diag::err_invalid_vector_decl_spec; + return true; + } + return false; +} + +bool DeclSpec::SetTypeAltiVecVector(bool isAltiVecVector, SourceLocation Loc, + const char *&PrevSpec, unsigned &DiagID) { + if (TypeSpecType != TST_unspecified) { + PrevSpec = DeclSpec::getSpecifierName((TST) TypeSpecType); + DiagID = diag::err_invalid_vector_decl_spec_combination; + return true; + } + TypeAltiVecVector = isAltiVecVector; + AltiVecLoc = Loc; + return false; +} + +bool DeclSpec::SetTypeAltiVecPixel(bool isAltiVecPixel, SourceLocation Loc, + const char *&PrevSpec, unsigned &DiagID) { + if (!TypeAltiVecVector || TypeAltiVecPixel || + (TypeSpecType != TST_unspecified)) { + PrevSpec = DeclSpec::getSpecifierName((TST) TypeSpecType); + DiagID = diag::err_invalid_pixel_decl_spec_combination; + return true; + } + TypeAltiVecPixel = isAltiVecPixel; + TSTLoc = Loc; + TSTNameLoc = Loc; + return false; +} + +bool DeclSpec::SetTypeSpecError() { + TypeSpecType = TST_error; + TypeSpecOwned = false; + TSTLoc = SourceLocation(); + TSTNameLoc = SourceLocation(); + return false; +} + +bool DeclSpec::SetTypeQual(TQ T, SourceLocation Loc, const char *&PrevSpec, + unsigned &DiagID, const LangOptions &Lang) { + // Duplicates turn into warnings pre-C99. + if ((TypeQualifiers & T) && !Lang.C99) + return BadSpecifier(T, T, PrevSpec, DiagID); + TypeQualifiers |= T; + + switch (T) { + default: llvm_unreachable("Unknown type qualifier!"); + case TQ_const: TQ_constLoc = Loc; break; + case TQ_restrict: TQ_restrictLoc = Loc; break; + case TQ_volatile: TQ_volatileLoc = Loc; break; + } + return false; +} + +bool DeclSpec::SetFunctionSpecInline(SourceLocation Loc, const char *&PrevSpec, + unsigned &DiagID) { + // 'inline inline' is ok. + FS_inline_specified = true; + FS_inlineLoc = Loc; + return false; +} + +bool DeclSpec::SetFunctionSpecVirtual(SourceLocation Loc, const char *&PrevSpec, + unsigned &DiagID) { + // 'virtual virtual' is ok. + FS_virtual_specified = true; + FS_virtualLoc = Loc; + return false; +} + +bool DeclSpec::SetFunctionSpecExplicit(SourceLocation Loc, const char *&PrevSpec, + unsigned &DiagID) { + // 'explicit explicit' is ok. + FS_explicit_specified = true; + FS_explicitLoc = Loc; + return false; +} + +bool DeclSpec::SetFriendSpec(SourceLocation Loc, const char *&PrevSpec, + unsigned &DiagID) { + if (Friend_specified) { + PrevSpec = "friend"; + DiagID = diag::ext_duplicate_declspec; + return true; + } + + Friend_specified = true; + FriendLoc = Loc; + return false; +} + +bool DeclSpec::setModulePrivateSpec(SourceLocation Loc, const char *&PrevSpec, + unsigned &DiagID) { + if (isModulePrivateSpecified()) { + PrevSpec = "__module_private__"; + DiagID = diag::ext_duplicate_declspec; + return true; + } + + ModulePrivateLoc = Loc; + return false; +} + +bool DeclSpec::SetConstexprSpec(SourceLocation Loc, const char *&PrevSpec, + unsigned &DiagID) { + // 'constexpr constexpr' is ok. + Constexpr_specified = true; + ConstexprLoc = Loc; + return false; +} + +void DeclSpec::setProtocolQualifiers(Decl * const *Protos, + unsigned NP, + SourceLocation *ProtoLocs, + SourceLocation LAngleLoc) { + if (NP == 0) return; + ProtocolQualifiers = new Decl*[NP]; + ProtocolLocs = new SourceLocation[NP]; + memcpy((void*)ProtocolQualifiers, Protos, sizeof(Decl*)*NP); + memcpy(ProtocolLocs, ProtoLocs, sizeof(SourceLocation)*NP); + NumProtocolQualifiers = NP; + ProtocolLAngleLoc = LAngleLoc; +} + +void DeclSpec::SaveWrittenBuiltinSpecs() { + writtenBS.Sign = getTypeSpecSign(); + writtenBS.Width = getTypeSpecWidth(); + writtenBS.Type = getTypeSpecType(); + // Search the list of attributes for the presence of a mode attribute. + writtenBS.ModeAttr = false; + AttributeList* attrs = getAttributes().getList(); + while (attrs) { + if (attrs->getKind() == AttributeList::AT_mode) { + writtenBS.ModeAttr = true; + break; + } + attrs = attrs->getNext(); + } +} + +void DeclSpec::SaveStorageSpecifierAsWritten() { + if (SCS_extern_in_linkage_spec && StorageClassSpec == SCS_extern) + // If 'extern' is part of a linkage specification, + // then it is not a storage class "as written". + StorageClassSpecAsWritten = SCS_unspecified; + else + StorageClassSpecAsWritten = StorageClassSpec; +} + +/// Finish - This does final analysis of the declspec, rejecting things like +/// "_Imaginary" (lacking an FP type). This returns a diagnostic to issue or +/// diag::NUM_DIAGNOSTICS if there is no error. After calling this method, +/// DeclSpec is guaranteed self-consistent, even if an error occurred. +void DeclSpec::Finish(DiagnosticsEngine &D, Preprocessor &PP) { + // Before possibly changing their values, save specs as written. + SaveWrittenBuiltinSpecs(); + SaveStorageSpecifierAsWritten(); + + // Check the type specifier components first. + + // Validate and finalize AltiVec vector declspec. + if (TypeAltiVecVector) { + if (TypeAltiVecBool) { + // Sign specifiers are not allowed with vector bool. (PIM 2.1) + if (TypeSpecSign != TSS_unspecified) { + Diag(D, TSSLoc, diag::err_invalid_vector_bool_decl_spec) + << getSpecifierName((TSS)TypeSpecSign); + } + + // Only char/int are valid with vector bool. (PIM 2.1) + if (((TypeSpecType != TST_unspecified) && (TypeSpecType != TST_char) && + (TypeSpecType != TST_int)) || TypeAltiVecPixel) { + Diag(D, TSTLoc, diag::err_invalid_vector_bool_decl_spec) + << (TypeAltiVecPixel ? "__pixel" : + getSpecifierName((TST)TypeSpecType)); + } + + // Only 'short' is valid with vector bool. (PIM 2.1) + if ((TypeSpecWidth != TSW_unspecified) && (TypeSpecWidth != TSW_short)) + Diag(D, TSWLoc, diag::err_invalid_vector_bool_decl_spec) + << getSpecifierName((TSW)TypeSpecWidth); + + // Elements of vector bool are interpreted as unsigned. (PIM 2.1) + if ((TypeSpecType == TST_char) || (TypeSpecType == TST_int) || + (TypeSpecWidth != TSW_unspecified)) + TypeSpecSign = TSS_unsigned; + } + + if (TypeAltiVecPixel) { + //TODO: perform validation + TypeSpecType = TST_int; + TypeSpecSign = TSS_unsigned; + TypeSpecWidth = TSW_short; + TypeSpecOwned = false; + } + } + + // signed/unsigned are only valid with int/char/wchar_t. + if (TypeSpecSign != TSS_unspecified) { + if (TypeSpecType == TST_unspecified) + TypeSpecType = TST_int; // unsigned -> unsigned int, signed -> signed int. + else if (TypeSpecType != TST_int && TypeSpecType != TST_int128 && + TypeSpecType != TST_char && TypeSpecType != TST_wchar) { + Diag(D, TSSLoc, diag::err_invalid_sign_spec) + << getSpecifierName((TST)TypeSpecType); + // signed double -> double. + TypeSpecSign = TSS_unspecified; + } + } + + // Validate the width of the type. + switch (TypeSpecWidth) { + case TSW_unspecified: break; + case TSW_short: // short int + case TSW_longlong: // long long int + if (TypeSpecType == TST_unspecified) + TypeSpecType = TST_int; // short -> short int, long long -> long long int. + else if (TypeSpecType != TST_int) { + Diag(D, TSWLoc, + TypeSpecWidth == TSW_short ? diag::err_invalid_short_spec + : diag::err_invalid_longlong_spec) + << getSpecifierName((TST)TypeSpecType); + TypeSpecType = TST_int; + TypeSpecOwned = false; + } + break; + case TSW_long: // long double, long int + if (TypeSpecType == TST_unspecified) + TypeSpecType = TST_int; // long -> long int. + else if (TypeSpecType != TST_int && TypeSpecType != TST_double) { + Diag(D, TSWLoc, diag::err_invalid_long_spec) + << getSpecifierName((TST)TypeSpecType); + TypeSpecType = TST_int; + TypeSpecOwned = false; + } + break; + } + + // TODO: if the implementation does not implement _Complex or _Imaginary, + // disallow their use. Need information about the backend. + if (TypeSpecComplex != TSC_unspecified) { + if (TypeSpecType == TST_unspecified) { + Diag(D, TSCLoc, diag::ext_plain_complex) + << FixItHint::CreateInsertion( + PP.getLocForEndOfToken(getTypeSpecComplexLoc()), + " double"); + TypeSpecType = TST_double; // _Complex -> _Complex double. + } else if (TypeSpecType == TST_int || TypeSpecType == TST_char) { + // Note that this intentionally doesn't include _Complex _Bool. + if (!PP.getLangOpts().CPlusPlus) + Diag(D, TSTLoc, diag::ext_integer_complex); + } else if (TypeSpecType != TST_float && TypeSpecType != TST_double) { + Diag(D, TSCLoc, diag::err_invalid_complex_spec) + << getSpecifierName((TST)TypeSpecType); + TypeSpecComplex = TSC_unspecified; + } + } + + // If no type specifier was provided and we're parsing a language where + // the type specifier is not optional, but we got 'auto' as a storage + // class specifier, then assume this is an attempt to use C++0x's 'auto' + // type specifier. + // FIXME: Does Microsoft really support implicit int in C++? + if (PP.getLangOpts().CPlusPlus && !PP.getLangOpts().MicrosoftExt && + TypeSpecType == TST_unspecified && StorageClassSpec == SCS_auto) { + TypeSpecType = TST_auto; + StorageClassSpec = StorageClassSpecAsWritten = SCS_unspecified; + TSTLoc = TSTNameLoc = StorageClassSpecLoc; + StorageClassSpecLoc = SourceLocation(); + } + // Diagnose if we've recovered from an ill-formed 'auto' storage class + // specifier in a pre-C++0x dialect of C++. + if (!PP.getLangOpts().CPlusPlus0x && TypeSpecType == TST_auto) + Diag(D, TSTLoc, diag::ext_auto_type_specifier); + if (PP.getLangOpts().CPlusPlus && !PP.getLangOpts().CPlusPlus0x && + StorageClassSpec == SCS_auto) + Diag(D, StorageClassSpecLoc, diag::warn_auto_storage_class) + << FixItHint::CreateRemoval(StorageClassSpecLoc); + if (TypeSpecType == TST_char16 || TypeSpecType == TST_char32) + Diag(D, TSTLoc, diag::warn_cxx98_compat_unicode_type) + << (TypeSpecType == TST_char16 ? "char16_t" : "char32_t"); + if (Constexpr_specified) + Diag(D, ConstexprLoc, diag::warn_cxx98_compat_constexpr); + + // C++ [class.friend]p6: + // No storage-class-specifier shall appear in the decl-specifier-seq + // of a friend declaration. + if (isFriendSpecified() && getStorageClassSpec()) { + DeclSpec::SCS SC = getStorageClassSpec(); + const char *SpecName = getSpecifierName(SC); + + SourceLocation SCLoc = getStorageClassSpecLoc(); + SourceLocation SCEndLoc = SCLoc.getLocWithOffset(strlen(SpecName)); + + Diag(D, SCLoc, diag::err_friend_storage_spec) + << SpecName + << FixItHint::CreateRemoval(SourceRange(SCLoc, SCEndLoc)); + + ClearStorageClassSpecs(); + } + + assert(!TypeSpecOwned || isDeclRep((TST) TypeSpecType)); + + // Okay, now we can infer the real type. + + // TODO: return "auto function" and other bad things based on the real type. + + // 'data definition has no type or storage class'? +} + +bool DeclSpec::isMissingDeclaratorOk() { + TST tst = getTypeSpecType(); + return isDeclRep(tst) && getRepAsDecl() != 0 && + StorageClassSpec != DeclSpec::SCS_typedef; +} + +void UnqualifiedId::clear() { + Kind = IK_Identifier; + Identifier = 0; + StartLocation = SourceLocation(); + EndLocation = SourceLocation(); +} + +void UnqualifiedId::setOperatorFunctionId(SourceLocation OperatorLoc, + OverloadedOperatorKind Op, + SourceLocation SymbolLocations[3]) { + Kind = IK_OperatorFunctionId; + StartLocation = OperatorLoc; + EndLocation = OperatorLoc; + OperatorFunctionId.Operator = Op; + for (unsigned I = 0; I != 3; ++I) { + OperatorFunctionId.SymbolLocations[I] = SymbolLocations[I].getRawEncoding(); + + if (SymbolLocations[I].isValid()) + EndLocation = SymbolLocations[I]; + } +} + +bool VirtSpecifiers::SetSpecifier(Specifier VS, SourceLocation Loc, + const char *&PrevSpec) { + LastLocation = Loc; + + if (Specifiers & VS) { + PrevSpec = getSpecifierName(VS); + return true; + } + + Specifiers |= VS; + + switch (VS) { + default: llvm_unreachable("Unknown specifier!"); + case VS_Override: VS_overrideLoc = Loc; break; + case VS_Final: VS_finalLoc = Loc; break; + } + + return false; +} + +const char *VirtSpecifiers::getSpecifierName(Specifier VS) { + switch (VS) { + default: llvm_unreachable("Unknown specifier"); + case VS_Override: return "override"; + case VS_Final: return "final"; + } +} |