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DeclSpec.cpp
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DeclSpec.cpp
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//===--- DeclSpec.cpp - Declaration Specifier Semantic Analysis -----------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file implements semantic analysis for declaration specifiers.
//
//===----------------------------------------------------------------------===//
#include "clang/Sema/DeclSpec.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/DeclCXX.h"
#include "clang/AST/Expr.h"
#include "clang/AST/LocInfoType.h"
#include "clang/AST/TypeLoc.h"
#include "clang/Basic/LangOptions.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Basic/Specifiers.h"
#include "clang/Basic/TargetInfo.h"
#include "clang/Sema/ParsedTemplate.h"
#include "clang/Sema/Sema.h"
#include "clang/Sema/SemaDiagnostic.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallString.h"
#include <cstring>
using namespace clang;
void UnqualifiedId::setTemplateId(TemplateIdAnnotation *TemplateId) {
assert(TemplateId && "NULL template-id annotation?");
assert(!TemplateId->isInvalid() &&
"should not convert invalid template-ids to unqualified-ids");
Kind = UnqualifiedIdKind::IK_TemplateId;
this->TemplateId = TemplateId;
StartLocation = TemplateId->TemplateNameLoc;
EndLocation = TemplateId->RAngleLoc;
}
void UnqualifiedId::setConstructorTemplateId(TemplateIdAnnotation *TemplateId) {
assert(TemplateId && "NULL template-id annotation?");
assert(!TemplateId->isInvalid() &&
"should not convert invalid template-ids to unqualified-ids");
Kind = UnqualifiedIdKind::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::MakeSuper(ASTContext &Context, CXXRecordDecl *RD,
SourceLocation SuperLoc,
SourceLocation ColonColonLoc) {
Builder.MakeSuper(Context, RD, SuperLoc, ColonColonLoc);
Range.setBegin(SuperLoc);
Range.setEnd(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);
assert(Range == Builder.getSourceRange() &&
"NestedNameSpecifierLoc range computation incorrect");
}
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 isAmbiguous,
SourceLocation LParenLoc,
ParamInfo *Params,
unsigned NumParams,
SourceLocation EllipsisLoc,
SourceLocation RParenLoc,
bool RefQualifierIsLvalueRef,
SourceLocation RefQualifierLoc,
SourceLocation MutableLoc,
ExceptionSpecificationType
ESpecType,
SourceRange ESpecRange,
ParsedType *Exceptions,
SourceRange *ExceptionRanges,
unsigned NumExceptions,
Expr *NoexceptExpr,
CachedTokens *ExceptionSpecTokens,
ArrayRef<NamedDecl*>
DeclsInPrototype,
SourceLocation LocalRangeBegin,
SourceLocation LocalRangeEnd,
Declarator &TheDeclarator,
TypeResult TrailingReturnType,
SourceLocation
TrailingReturnTypeLoc,
DeclSpec *MethodQualifiers) {
assert(!(MethodQualifiers && MethodQualifiers->getTypeQualifiers() & DeclSpec::TQ_atomic) &&
"function cannot have _Atomic qualifier");
DeclaratorChunk I;
I.Kind = Function;
I.Loc = LocalRangeBegin;
I.EndLoc = LocalRangeEnd;
new (&I.Fun) FunctionTypeInfo;
I.Fun.hasPrototype = hasProto;
I.Fun.isVariadic = EllipsisLoc.isValid();
I.Fun.isAmbiguous = isAmbiguous;
I.Fun.LParenLoc = LParenLoc;
I.Fun.EllipsisLoc = EllipsisLoc;
I.Fun.RParenLoc = RParenLoc;
I.Fun.DeleteParams = false;
I.Fun.NumParams = NumParams;
I.Fun.Params = nullptr;
I.Fun.RefQualifierIsLValueRef = RefQualifierIsLvalueRef;
I.Fun.RefQualifierLoc = RefQualifierLoc;
I.Fun.MutableLoc = MutableLoc;
I.Fun.ExceptionSpecType = ESpecType;
I.Fun.ExceptionSpecLocBeg = ESpecRange.getBegin();
I.Fun.ExceptionSpecLocEnd = ESpecRange.getEnd();
I.Fun.NumExceptionsOrDecls = 0;
I.Fun.Exceptions = nullptr;
I.Fun.NoexceptExpr = nullptr;
I.Fun.HasTrailingReturnType = TrailingReturnType.isUsable() ||
TrailingReturnType.isInvalid();
I.Fun.TrailingReturnType = TrailingReturnType.get();
I.Fun.TrailingReturnTypeLoc = TrailingReturnTypeLoc;
I.Fun.MethodQualifiers = nullptr;
I.Fun.QualAttrFactory = nullptr;
if (MethodQualifiers && (MethodQualifiers->getTypeQualifiers() ||
MethodQualifiers->getAttributes().size())) {
auto &attrs = MethodQualifiers->getAttributes();
I.Fun.MethodQualifiers = new DeclSpec(attrs.getPool().getFactory());
MethodQualifiers->forEachCVRUQualifier(
[&](DeclSpec::TQ TypeQual, StringRef PrintName, SourceLocation SL) {
I.Fun.MethodQualifiers->SetTypeQual(TypeQual, SL);
});
I.Fun.MethodQualifiers->getAttributes().takeAllFrom(attrs);
I.Fun.MethodQualifiers->getAttributePool().takeAllFrom(attrs.getPool());
}
assert(I.Fun.ExceptionSpecType == ESpecType && "bitfield overflow");
// new[] a parameter array if needed.
if (NumParams) {
// 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 with too many parameters), go to the heap.
if (!TheDeclarator.InlineStorageUsed &&
NumParams <= std::size(TheDeclarator.InlineParams)) {
I.Fun.Params = TheDeclarator.InlineParams;
new (I.Fun.Params) ParamInfo[NumParams];
I.Fun.DeleteParams = false;
TheDeclarator.InlineStorageUsed = true;
} else {
I.Fun.Params = new DeclaratorChunk::ParamInfo[NumParams];
I.Fun.DeleteParams = true;
}
for (unsigned i = 0; i < NumParams; i++)
I.Fun.Params[i] = std::move(Params[i]);
}
// 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.NumExceptionsOrDecls = 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_DependentNoexcept:
case EST_NoexceptFalse:
case EST_NoexceptTrue:
I.Fun.NoexceptExpr = NoexceptExpr;
break;
case EST_Unparsed:
I.Fun.ExceptionSpecTokens = ExceptionSpecTokens;
break;
}
if (!DeclsInPrototype.empty()) {
assert(ESpecType == EST_None && NumExceptions == 0 &&
"cannot have exception specifiers and decls in prototype");
I.Fun.NumExceptionsOrDecls = DeclsInPrototype.size();
// Copy the array of decls into stable heap storage.
I.Fun.DeclsInPrototype = new NamedDecl *[DeclsInPrototype.size()];
for (size_t J = 0; J < DeclsInPrototype.size(); ++J)
I.Fun.DeclsInPrototype[J] = DeclsInPrototype[J];
}
return I;
}
void Declarator::setDecompositionBindings(
SourceLocation LSquareLoc,
ArrayRef<DecompositionDeclarator::Binding> Bindings,
SourceLocation RSquareLoc) {
assert(!hasName() && "declarator given multiple names!");
BindingGroup.LSquareLoc = LSquareLoc;
BindingGroup.RSquareLoc = RSquareLoc;
BindingGroup.NumBindings = Bindings.size();
Range.setEnd(RSquareLoc);
// We're now past the identifier.
SetIdentifier(nullptr, LSquareLoc);
Name.EndLocation = RSquareLoc;
// Allocate storage for bindings and stash them away.
if (Bindings.size()) {
if (!InlineStorageUsed && Bindings.size() <= std::size(InlineBindings)) {
BindingGroup.Bindings = InlineBindings;
BindingGroup.DeleteBindings = false;
InlineStorageUsed = true;
} else {
BindingGroup.Bindings =
new DecompositionDeclarator::Binding[Bindings.size()];
BindingGroup.DeleteBindings = true;
}
std::uninitialized_copy(Bindings.begin(), Bindings.end(),
BindingGroup.Bindings);
}
}
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:
case DeclaratorChunk::Pipe:
return false;
}
llvm_unreachable("Invalid type chunk");
}
switch (DS.getTypeSpecType()) {
case TST_atomic:
case TST_auto:
case TST_auto_type:
case TST_bool:
case TST_char:
case TST_char8:
case TST_char16:
case TST_char32:
case TST_class:
case TST_decimal128:
case TST_decimal32:
case TST_decimal64:
case TST_double:
case TST_Accum:
case TST_Fract:
case TST_Float16:
case TST_float128:
case TST_ibm128:
case TST_enum:
case TST_error:
case TST_float:
case TST_half:
case TST_int:
case TST_int128:
case TST_bitint:
case TST_struct:
case TST_interface:
case TST_union:
case TST_unknown_anytype:
case TST_unspecified:
case TST_void:
case TST_wchar:
case TST_BFloat16:
#define GENERIC_IMAGE_TYPE(ImgType, Id) case TST_##ImgType##_t:
#include "clang/Basic/OpenCLImageTypes.def"
return false;
case TST_decltype_auto:
// This must have an initializer, so can't be a function declaration,
// even if the initializer has function type.
return false;
case TST_decltype:
case TST_typeof_unqualExpr:
case TST_typeofExpr:
if (Expr *E = DS.getRepAsExpr())
return E->getType()->isFunctionType();
return false;
#define TRANSFORM_TYPE_TRAIT_DEF(_, Trait) case TST_##Trait:
#include "clang/Basic/TransformTypeTraits.def"
case TST_typename:
case TST_typeof_unqualType:
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!");
}
bool Declarator::isStaticMember() {
assert(getContext() == DeclaratorContext::Member);
return getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_static ||
(getName().getKind() == UnqualifiedIdKind::IK_OperatorFunctionId &&
CXXMethodDecl::isStaticOverloadedOperator(
getName().OperatorFunctionId.Operator));
}
bool Declarator::isCtorOrDtor() {
return (getName().getKind() == UnqualifiedIdKind::IK_ConstructorName) ||
(getName().getKind() == UnqualifiedIdKind::IK_DestructorName);
}
void DeclSpec::forEachCVRUQualifier(
llvm::function_ref<void(TQ, StringRef, SourceLocation)> Handle) {
if (TypeQualifiers & TQ_const)
Handle(TQ_const, "const", TQ_constLoc);
if (TypeQualifiers & TQ_volatile)
Handle(TQ_volatile, "volatile", TQ_volatileLoc);
if (TypeQualifiers & TQ_restrict)
Handle(TQ_restrict, "restrict", TQ_restrictLoc);
if (TypeQualifiers & TQ_unaligned)
Handle(TQ_unaligned, "unaligned", TQ_unalignedLoc);
}
void DeclSpec::forEachQualifier(
llvm::function_ref<void(TQ, StringRef, SourceLocation)> Handle) {
forEachCVRUQualifier(Handle);
// FIXME: Add code below to iterate through the attributes and call Handle.
}
bool DeclSpec::hasTagDefinition() const {
if (!TypeSpecOwned)
return false;
return cast<TagDecl>(getRepAsDecl())->isCompleteDefinition();
}
/// getParsedSpecifiers - Return a bitmask of which flavors of specifiers this
/// declaration specifier includes.
///
unsigned DeclSpec::getParsedSpecifiers() const {
unsigned Res = 0;
if (StorageClassSpec != SCS_unspecified ||
ThreadStorageClassSpec != TSCS_unspecified)
Res |= PQ_StorageClassSpecifier;
if (TypeQualifiers != TQ_unspecified)
Res |= PQ_TypeQualifier;
if (hasTypeSpecifier())
Res |= PQ_TypeSpecifier;
if (FS_inline_specified || FS_virtual_specified || hasExplicitSpecifier() ||
FS_noreturn_specified || FS_forceinline_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_warn_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(DeclSpec::TSCS S) {
switch (S) {
case DeclSpec::TSCS_unspecified: return "unspecified";
case DeclSpec::TSCS___thread: return "__thread";
case DeclSpec::TSCS_thread_local: return "thread_local";
case DeclSpec::TSCS__Thread_local: return "_Thread_local";
}
llvm_unreachable("Unknown typespec!");
}
const char *DeclSpec::getSpecifierName(TypeSpecifierWidth W) {
switch (W) {
case TypeSpecifierWidth::Unspecified:
return "unspecified";
case TypeSpecifierWidth::Short:
return "short";
case TypeSpecifierWidth::Long:
return "long";
case TypeSpecifierWidth::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(TypeSpecifierSign S) {
switch (S) {
case TypeSpecifierSign::Unspecified:
return "unspecified";
case TypeSpecifierSign::Signed:
return "signed";
case TypeSpecifierSign::Unsigned:
return "unsigned";
}
llvm_unreachable("Unknown typespec!");
}
const char *DeclSpec::getSpecifierName(DeclSpec::TST T,
const PrintingPolicy &Policy) {
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 Policy.MSWChar ? "__wchar_t" : "wchar_t";
case DeclSpec::TST_char8: return "char8_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_bitint: return "_BitInt";
case DeclSpec::TST_half: return "half";
case DeclSpec::TST_float: return "float";
case DeclSpec::TST_double: return "double";
case DeclSpec::TST_accum: return "_Accum";
case DeclSpec::TST_fract: return "_Fract";
case DeclSpec::TST_float16: return "_Float16";
case DeclSpec::TST_float128: return "__float128";
case DeclSpec::TST_ibm128: return "__ibm128";
case DeclSpec::TST_bool: return Policy.Bool ? "bool" : "_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_interface: return "__interface";
case DeclSpec::TST_typename: return "type-name";
case DeclSpec::TST_typeofType:
case DeclSpec::TST_typeofExpr: return "typeof";
case DeclSpec::TST_typeof_unqualType:
case DeclSpec::TST_typeof_unqualExpr: return "typeof_unqual";
case DeclSpec::TST_auto: return "auto";
case DeclSpec::TST_auto_type: return "__auto_type";
case DeclSpec::TST_decltype: return "(decltype)";
case DeclSpec::TST_decltype_auto: return "decltype(auto)";
#define TRANSFORM_TYPE_TRAIT_DEF(_, Trait) \
case DeclSpec::TST_##Trait: \
return "__" #Trait;
#include "clang/Basic/TransformTypeTraits.def"
case DeclSpec::TST_unknown_anytype: return "__unknown_anytype";
case DeclSpec::TST_atomic: return "_Atomic";
case DeclSpec::TST_BFloat16: return "__bf16";
#define GENERIC_IMAGE_TYPE(ImgType, Id) \
case DeclSpec::TST_##ImgType##_t: \
return #ImgType "_t";
#include "clang/Basic/OpenCLImageTypes.def"
case DeclSpec::TST_error: return "(error)";
}
llvm_unreachable("Unknown typespec!");
}
const char *DeclSpec::getSpecifierName(ConstexprSpecKind C) {
switch (C) {
case ConstexprSpecKind::Unspecified:
return "unspecified";
case ConstexprSpecKind::Constexpr:
return "constexpr";
case ConstexprSpecKind::Consteval:
return "consteval";
case ConstexprSpecKind::Constinit:
return "constinit";
}
llvm_unreachable("Unknown ConstexprSpecKind");
}
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";
case DeclSpec::TQ_atomic: return "_Atomic";
case DeclSpec::TQ_unaligned: return "__unaligned";
}
llvm_unreachable("Unknown typespec!");
}
bool DeclSpec::SetStorageClassSpec(Sema &S, SCS SC, SourceLocation Loc,
const char *&PrevSpec,
unsigned &DiagID,
const PrintingPolicy &Policy) {
// 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().isAvailableOption(
"cl_clang_storage_class_specifiers", S.getLangOpts())) {
switch (SC) {
case SCS_extern:
case SCS_private_extern:
case SCS_static:
if (S.getLangOpts().getOpenCLCompatibleVersion() < 120) {
DiagID = diag::err_opencl_unknown_type_specifier;
PrevSpec = getSpecifierName(SC);
return true;
}
break;
case SCS_auto:
case SCS_register:
DiagID = diag::err_opencl_unknown_type_specifier;
PrevSpec = getSpecifierName(SC);
return true;
default:
break;
}
}
if (StorageClassSpec != SCS_unspecified) {
// Maybe this is an attempt to use C++11 'auto' outside of C++11 mode.
bool isInvalid = true;
if (TypeSpecType == TST_unspecified && S.getLangOpts().CPlusPlus) {
if (SC == SCS_auto)
return SetTypeSpecType(TST_auto, Loc, PrevSpec, DiagID, Policy);
if (StorageClassSpec == SCS_auto) {
isInvalid = SetTypeSpecType(TST_auto, StorageClassSpecLoc,
PrevSpec, DiagID, Policy);
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(TSCS TSC, SourceLocation Loc,
const char *&PrevSpec,
unsigned &DiagID) {
if (ThreadStorageClassSpec != TSCS_unspecified)
return BadSpecifier(TSC, (TSCS)ThreadStorageClassSpec, PrevSpec, DiagID);
ThreadStorageClassSpec = TSC;
ThreadStorageClassSpecLoc = 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(TypeSpecifierWidth W, SourceLocation Loc,
const char *&PrevSpec, unsigned &DiagID,
const PrintingPolicy &Policy) {
// Overwrite TSWRange.Begin only if TypeSpecWidth was unspecified, so that
// for 'long long' we will keep the source location of the first 'long'.
if (getTypeSpecWidth() == TypeSpecifierWidth::Unspecified)
TSWRange.setBegin(Loc);
// Allow turning long -> long long.
else if (W != TypeSpecifierWidth::LongLong ||
getTypeSpecWidth() != TypeSpecifierWidth::Long)
return BadSpecifier(W, getTypeSpecWidth(), PrevSpec, DiagID);
TypeSpecWidth = static_cast<unsigned>(W);
// Remember location of the last 'long'
TSWRange.setEnd(Loc);
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(TypeSpecifierSign S, SourceLocation Loc,
const char *&PrevSpec, unsigned &DiagID) {
if (getTypeSpecSign() != TypeSpecifierSign::Unspecified)
return BadSpecifier(S, getTypeSpecSign(), PrevSpec, DiagID);
TypeSpecSign = static_cast<unsigned>(S);
TSSLoc = Loc;
return false;
}
bool DeclSpec::SetTypeSpecType(TST T, SourceLocation Loc,
const char *&PrevSpec,
unsigned &DiagID,
ParsedType Rep,
const PrintingPolicy &Policy) {
return SetTypeSpecType(T, Loc, Loc, PrevSpec, DiagID, Rep, Policy);
}
bool DeclSpec::SetTypeSpecType(TST T, SourceLocation TagKwLoc,
SourceLocation TagNameLoc,
const char *&PrevSpec,
unsigned &DiagID,
ParsedType Rep,
const PrintingPolicy &Policy) {
assert(isTypeRep(T) && "T does not store a type");
assert(Rep && "no type provided!");
if (TypeSpecType == TST_error)
return false;
if (TypeSpecType != TST_unspecified) {
PrevSpec = DeclSpec::getSpecifierName((TST) TypeSpecType, Policy);
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,
const PrintingPolicy &Policy) {
assert(isExprRep(T) && "T does not store an expr");
assert(Rep && "no expression provided!");
if (TypeSpecType == TST_error)
return false;
if (TypeSpecType != TST_unspecified) {
PrevSpec = DeclSpec::getSpecifierName((TST) TypeSpecType, Policy);
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,
const PrintingPolicy &Policy) {
return SetTypeSpecType(T, Loc, Loc, PrevSpec, DiagID, Rep, Owned, Policy);
}
bool DeclSpec::SetTypeSpecType(TST T, SourceLocation TagKwLoc,
SourceLocation TagNameLoc,
const char *&PrevSpec,
unsigned &DiagID,
Decl *Rep, bool Owned,
const PrintingPolicy &Policy) {
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_error)
return false;
if (TypeSpecType != TST_unspecified) {
PrevSpec = DeclSpec::getSpecifierName((TST) TypeSpecType, Policy);
DiagID = diag::err_invalid_decl_spec_combination;
return true;
}
TypeSpecType = T;
DeclRep = Rep;
TSTLoc = TagKwLoc;
TSTNameLoc = TagNameLoc;
TypeSpecOwned = Owned && Rep != nullptr;
return false;
}
bool DeclSpec::SetTypeSpecType(TST T, SourceLocation Loc, const char *&PrevSpec,
unsigned &DiagID, TemplateIdAnnotation *Rep,
const PrintingPolicy &Policy) {
assert(T == TST_auto || T == TST_decltype_auto);
ConstrainedAuto = true;
TemplateIdRep = Rep;
return SetTypeSpecType(T, Loc, PrevSpec, DiagID, Policy);
}
bool DeclSpec::SetTypeSpecType(TST T, SourceLocation Loc,
const char *&PrevSpec,
unsigned &DiagID,
const PrintingPolicy &Policy) {
assert(!isDeclRep(T) && !isTypeRep(T) && !isExprRep(T) &&
"rep required for these type-spec kinds!");
if (TypeSpecType == TST_error)
return false;
if (TypeSpecType != TST_unspecified) {
PrevSpec = DeclSpec::getSpecifierName((TST) TypeSpecType, Policy);
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;
return false;
}
bool DeclSpec::SetTypeSpecSat(SourceLocation Loc, const char *&PrevSpec,
unsigned &DiagID) {
// Cannot set twice
if (TypeSpecSat) {
DiagID = diag::warn_duplicate_declspec;
PrevSpec = "_Sat";
return true;
}
TypeSpecSat = true;
TSSatLoc = Loc;
return false;
}
bool DeclSpec::SetTypeAltiVecVector(bool isAltiVecVector, SourceLocation Loc,
const char *&PrevSpec, unsigned &DiagID,
const PrintingPolicy &Policy) {
if (TypeSpecType == TST_error)
return false;
if (TypeSpecType != TST_unspecified) {
PrevSpec = DeclSpec::getSpecifierName((TST) TypeSpecType, Policy);
DiagID = diag::err_invalid_vector_decl_spec_combination;
return true;
}
TypeAltiVecVector = isAltiVecVector;
AltiVecLoc = Loc;
return false;
}
bool DeclSpec::SetTypePipe(bool isPipe, SourceLocation Loc,
const char *&PrevSpec, unsigned &DiagID,
const PrintingPolicy &Policy) {
if (TypeSpecType == TST_error)
return false;
if (TypeSpecType != TST_unspecified) {
PrevSpec = DeclSpec::getSpecifierName((TST)TypeSpecType, Policy);
DiagID = diag::err_invalid_decl_spec_combination;
return true;
}
if (isPipe) {
TypeSpecPipe = static_cast<unsigned>(TypeSpecifiersPipe::Pipe);
}
return false;
}
bool DeclSpec::SetTypeAltiVecPixel(bool isAltiVecPixel, SourceLocation Loc,
const char *&PrevSpec, unsigned &DiagID,
const PrintingPolicy &Policy) {
if (TypeSpecType == TST_error)
return false;
if (!TypeAltiVecVector || TypeAltiVecPixel ||
(TypeSpecType != TST_unspecified)) {
PrevSpec = DeclSpec::getSpecifierName((TST) TypeSpecType, Policy);
DiagID = diag::err_invalid_pixel_decl_spec_combination;
return true;
}
TypeAltiVecPixel = isAltiVecPixel;
TSTLoc = Loc;
TSTNameLoc = Loc;
return false;
}
bool DeclSpec::SetTypeAltiVecBool(bool isAltiVecBool, SourceLocation Loc,
const char *&PrevSpec, unsigned &DiagID,
const PrintingPolicy &Policy) {
if (TypeSpecType == TST_error)
return false;
if (!TypeAltiVecVector || TypeAltiVecBool ||
(TypeSpecType != TST_unspecified)) {
PrevSpec = DeclSpec::getSpecifierName((TST) TypeSpecType, Policy);
DiagID = diag::err_invalid_vector_bool_decl_spec;
return true;
}
TypeAltiVecBool = isAltiVecBool;
TSTLoc = Loc;
TSTNameLoc = Loc;
return false;
}
bool DeclSpec::SetTypeSpecError() {
TypeSpecType = TST_error;
TypeSpecOwned = false;
TSTLoc = SourceLocation();
TSTNameLoc = SourceLocation();
return false;
}
bool DeclSpec::SetBitIntType(SourceLocation KWLoc, Expr *BitsExpr,
const char *&PrevSpec, unsigned &DiagID,
const PrintingPolicy &Policy) {
assert(BitsExpr && "no expression provided!");
if (TypeSpecType == TST_error)
return false;
if (TypeSpecType != TST_unspecified) {
PrevSpec = DeclSpec::getSpecifierName((TST) TypeSpecType, Policy);
DiagID = diag::err_invalid_decl_spec_combination;
return true;
}
TypeSpecType = TST_bitint;
ExprRep = BitsExpr;
TSTLoc = KWLoc;
TSTNameLoc = KWLoc;
TypeSpecOwned = false;
return false;
}
bool DeclSpec::SetTypeQual(TQ T, SourceLocation Loc, const char *&PrevSpec,
unsigned &DiagID, const LangOptions &Lang) {
// Duplicates are permitted in C99 onwards, but are not permitted in C89 or
// C++. 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)
IsExtension = false;
return BadSpecifier(T, T, PrevSpec, DiagID, IsExtension);
}
return SetTypeQual(T, Loc);
}
bool DeclSpec::SetTypeQual(TQ T, SourceLocation Loc) {
TypeQualifiers |= T;
switch (T) {
case TQ_unspecified: break;
case TQ_const: TQ_constLoc = Loc; return false;
case TQ_restrict: TQ_restrictLoc = Loc; return false;
case TQ_volatile: TQ_volatileLoc = Loc; return false;
case TQ_unaligned: TQ_unalignedLoc = Loc; return false;
case TQ_atomic: TQ_atomicLoc = Loc; return false;
}
llvm_unreachable("Unknown type qualifier!");
}
bool DeclSpec::setFunctionSpecInline(SourceLocation Loc, const char *&PrevSpec,
unsigned &DiagID) {
// 'inline inline' is ok. However, since this is likely not what the user
// intended, we will always warn, similar to duplicates of type qualifiers.
if (FS_inline_specified) {
DiagID = diag::warn_duplicate_declspec;