blob: 8fdb07029a565b835b0968054fd01ea2d2aefcd1 [file] [log] [blame]
//===--- 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,
bool isAmbiguous,
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.isAmbiguous = isAmbiguous;
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,
bool IsExtension = true) {
PrevSpec = DeclSpec::getSpecifierName(TPrev);
if (TNew != TPrev)
DiagID = diag::err_invalid_decl_spec_combination;
else
DiagID = IsExtension ? diag::ext_duplicate_declspec :
diag::warn_duplicate_declspec;
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. However, since this is likely
// not what the user intended, we will always warn. We do not need to set the
// qualifier's location since we already have it.
if (TypeQualifiers & T) {
bool IsExtension = true;
if (Lang.C99 || (Lang.CPlusPlus0x && !IsTypeSpec))
IsExtension = false;
return BadSpecifier(T, T, PrevSpec, DiagID, IsExtension);
}
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";
}
}