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-rw-r--r--clang/lib/Sema/DeclSpec.cpp986
1 files changed, 986 insertions, 0 deletions
diff --git a/clang/lib/Sema/DeclSpec.cpp b/clang/lib/Sema/DeclSpec.cpp
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+++ b/clang/lib/Sema/DeclSpec.cpp
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+//===--- 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";
+ }
+}