| //===--- 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, |
| TypeResult 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.HasTrailingReturnType = TrailingReturnType.isUsable() || |
| TrailingReturnType.isInvalid(); |
| I.Fun.TrailingReturnType = TrailingReturnType.get(); |
| |
| // 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 v1.1 s6.8g: "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. |
| // OpenCL v1.2 s6.8 changes this to "The auto and register storage-class |
| // specifiers are not supported." |
| if (S.getLangOpts().OpenCL && |
| !S.getOpenCLOptions().cl_clang_storage_class_specifiers) { |
| switch (SC) { |
| case SCS_extern: |
| case SCS_private_extern: |
| case SCS_static: |
| if (S.getLangOpts().OpenCLVersion < 120) { |
| DiagID = diag::err_not_opencl_storage_class_specifier; |
| PrevSpec = getSpecifierName(SC); |
| return true; |
| } |
| break; |
| case SCS_auto: |
| case SCS_register: |
| 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, |
| bool IsTypeSpec) { |
| // Duplicates are permitted in C99, and are permitted in C++11 unless the |
| // cv-qualifier appears as a type-specifier. |
| if ((TypeQualifiers & T) && !Lang.C99 && (!Lang.CPlusPlus0x || IsTypeSpec)) |
| 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::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"; |
| } |
| } |
