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llvm-for-llvmta/tools/clang/lib/Sema/DeclSpec.cpp

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2022-04-25 13:02:35 +02:00
//===--- 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/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 <= llvm::array_lengthof(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() <= llvm::array_lengthof(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_enum:
case TST_error:
case TST_float:
case TST_half:
case TST_int:
case TST_int128:
case TST_extint:
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_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!");
}
bool Declarator::isStaticMember() {
assert(getContext() == DeclaratorContext::Member);
return getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_static ||
(getName().Kind == 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_extint: return "_ExtInt";
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_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_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)";
case DeclSpec::TST_underlyingType: return "__underlying_type";
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().isEnabled("cl_clang_storage_class_specifiers")) {
switch (SC) {
case SCS_extern:
case SCS_private_extern:
case SCS_static:
if (S.getLangOpts().OpenCLVersion < 120 &&
!S.getLangOpts().OpenCLCPlusPlus) {
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::SetExtIntType(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_extint;
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;
PrevSpec = "inline";
return true;
}
FS_inline_specified = true;
FS_inlineLoc = Loc;
return false;
}
bool DeclSpec::setFunctionSpecForceInline(SourceLocation Loc, const char *&PrevSpec,
unsigned &DiagID) {
if (FS_forceinline_specified) {
DiagID = diag::warn_duplicate_declspec;
PrevSpec = "__forceinline";
return true;
}
FS_forceinline_specified = true;
FS_forceinlineLoc = Loc;
return false;
}
bool DeclSpec::setFunctionSpecVirtual(SourceLocation Loc,
const char *&PrevSpec,
unsigned &DiagID) {
// 'virtual virtual' is ok, but warn as this is likely not what the user
// intended.
if (FS_virtual_specified) {
DiagID = diag::warn_duplicate_declspec;
PrevSpec = "virtual";
return true;
}
FS_virtual_specified = true;
FS_virtualLoc = Loc;
return false;
}
bool DeclSpec::setFunctionSpecExplicit(SourceLocation Loc,
const char *&PrevSpec, unsigned &DiagID,
ExplicitSpecifier ExplicitSpec,
SourceLocation CloseParenLoc) {
// 'explicit explicit' is ok, but warn as this is likely not what the user
// intended.
if (hasExplicitSpecifier()) {
DiagID = (ExplicitSpec.getExpr() || FS_explicit_specifier.getExpr())
? diag::err_duplicate_declspec
: diag::ext_warn_duplicate_declspec;
PrevSpec = "explicit";
return true;
}
FS_explicit_specifier = ExplicitSpec;
FS_explicitLoc = Loc;
FS_explicitCloseParenLoc = CloseParenLoc;
return false;
}
bool DeclSpec::setFunctionSpecNoreturn(SourceLocation Loc,
const char *&PrevSpec,
unsigned &DiagID) {
// '_Noreturn _Noreturn' is ok, but warn as this is likely not what the user
// intended.
if (FS_noreturn_specified) {
DiagID = diag::warn_duplicate_declspec;
PrevSpec = "_Noreturn";
return true;
}
FS_noreturn_specified = true;
FS_noreturnLoc = Loc;
return false;
}
bool DeclSpec::SetFriendSpec(SourceLocation Loc, const char *&PrevSpec,
unsigned &DiagID) {
if (Friend_specified) {
PrevSpec = "friend";
// Keep the later location, so that we can later diagnose ill-formed
// declarations like 'friend class X friend;'. Per [class.friend]p3,
// 'friend' must be the first token in a friend declaration that is
// not a function declaration.
FriendLoc = Loc;
DiagID = diag::warn_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_warn_duplicate_declspec;
return true;
}
ModulePrivateLoc = Loc;
return false;
}
bool DeclSpec::SetConstexprSpec(ConstexprSpecKind ConstexprKind,
SourceLocation Loc, const char *&PrevSpec,
unsigned &DiagID) {
if (getConstexprSpecifier() != ConstexprSpecKind::Unspecified)
return BadSpecifier(ConstexprKind, getConstexprSpecifier(), PrevSpec,
DiagID);
ConstexprSpecifier = static_cast<unsigned>(ConstexprKind);
ConstexprLoc = Loc;
return false;
}
void DeclSpec::SaveWrittenBuiltinSpecs() {
writtenBS.Sign = static_cast<int>(getTypeSpecSign());
writtenBS.Width = static_cast<int>(getTypeSpecWidth());
writtenBS.Type = getTypeSpecType();
// Search the list of attributes for the presence of a mode attribute.
writtenBS.ModeAttr = getAttributes().hasAttribute(ParsedAttr::AT_Mode);
}
/// 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(Sema &S, const PrintingPolicy &Policy) {
// Before possibly changing their values, save specs as written.
SaveWrittenBuiltinSpecs();
// Check the type specifier components first. No checking for an invalid
// type.
if (TypeSpecType == TST_error)
return;
// If decltype(auto) is used, no other type specifiers are permitted.
if (TypeSpecType == TST_decltype_auto &&
(getTypeSpecWidth() != TypeSpecifierWidth::Unspecified ||
TypeSpecComplex != TSC_unspecified ||
getTypeSpecSign() != TypeSpecifierSign::Unspecified ||
TypeAltiVecVector || TypeAltiVecPixel || TypeAltiVecBool ||
TypeQualifiers)) {
const unsigned NumLocs = 9;
SourceLocation ExtraLocs[NumLocs] = {
TSWRange.getBegin(), TSCLoc, TSSLoc,
AltiVecLoc, TQ_constLoc, TQ_restrictLoc,
TQ_volatileLoc, TQ_atomicLoc, TQ_unalignedLoc};
FixItHint Hints[NumLocs];
SourceLocation FirstLoc;
for (unsigned I = 0; I != NumLocs; ++I) {
if (ExtraLocs[I].isValid()) {
if (FirstLoc.isInvalid() ||
S.getSourceManager().isBeforeInTranslationUnit(ExtraLocs[I],
FirstLoc))
FirstLoc = ExtraLocs[I];
Hints[I] = FixItHint::CreateRemoval(ExtraLocs[I]);
}
}
TypeSpecWidth = static_cast<unsigned>(TypeSpecifierWidth::Unspecified);
TypeSpecComplex = TSC_unspecified;
TypeSpecSign = static_cast<unsigned>(TypeSpecifierSign::Unspecified);
TypeAltiVecVector = TypeAltiVecPixel = TypeAltiVecBool = false;
TypeQualifiers = 0;
S.Diag(TSTLoc, diag::err_decltype_auto_cannot_be_combined)
<< Hints[0] << Hints[1] << Hints[2] << Hints[3]
<< Hints[4] << Hints[5] << Hints[6] << Hints[7];
}
// Validate and finalize AltiVec vector declspec.
if (TypeAltiVecVector) {
if (TypeAltiVecBool) {
// Sign specifiers are not allowed with vector bool. (PIM 2.1)
if (getTypeSpecSign() != TypeSpecifierSign::Unspecified) {
S.Diag(TSSLoc, diag::err_invalid_vector_bool_decl_spec)
<< getSpecifierName(getTypeSpecSign());
}
// Only char/int are valid with vector bool prior to Power10.
// Power10 adds instructions that produce vector bool data
// for quadwords as well so allow vector bool __int128.
if (((TypeSpecType != TST_unspecified) && (TypeSpecType != TST_char) &&
(TypeSpecType != TST_int) && (TypeSpecType != TST_int128)) ||
TypeAltiVecPixel) {
S.Diag(TSTLoc, diag::err_invalid_vector_bool_decl_spec)
<< (TypeAltiVecPixel ? "__pixel" :
getSpecifierName((TST)TypeSpecType, Policy));
}
// vector bool __int128 requires Power10.
if ((TypeSpecType == TST_int128) &&
(!S.Context.getTargetInfo().hasFeature("power10-vector")))
S.Diag(TSTLoc, diag::err_invalid_vector_bool_int128_decl_spec);
// Only 'short' and 'long long' are valid with vector bool. (PIM 2.1)
if ((getTypeSpecWidth() != TypeSpecifierWidth::Unspecified) &&
(getTypeSpecWidth() != TypeSpecifierWidth::Short) &&
(getTypeSpecWidth() != TypeSpecifierWidth::LongLong))
S.Diag(TSWRange.getBegin(), diag::err_invalid_vector_bool_decl_spec)
<< getSpecifierName(getTypeSpecWidth());
// vector bool long long requires VSX support or ZVector.
if ((getTypeSpecWidth() == TypeSpecifierWidth::LongLong) &&
(!S.Context.getTargetInfo().hasFeature("vsx")) &&
(!S.Context.getTargetInfo().hasFeature("power8-vector")) &&
!S.getLangOpts().ZVector)
S.Diag(TSTLoc, diag::err_invalid_vector_long_long_decl_spec);
// Elements of vector bool are interpreted as unsigned. (PIM 2.1)
if ((TypeSpecType == TST_char) || (TypeSpecType == TST_int) ||
(TypeSpecType == TST_int128) ||
(getTypeSpecWidth() != TypeSpecifierWidth::Unspecified))
TypeSpecSign = static_cast<unsigned>(TypeSpecifierSign::Unsigned);
} else if (TypeSpecType == TST_double) {
// vector long double and vector long long double are never allowed.
// vector double is OK for Power7 and later, and ZVector.
if (getTypeSpecWidth() == TypeSpecifierWidth::Long ||
getTypeSpecWidth() == TypeSpecifierWidth::LongLong)
S.Diag(TSWRange.getBegin(),
diag::err_invalid_vector_long_double_decl_spec);
else if (!S.Context.getTargetInfo().hasFeature("vsx") &&
!S.getLangOpts().ZVector)
S.Diag(TSTLoc, diag::err_invalid_vector_double_decl_spec);
} else if (TypeSpecType == TST_float) {
// vector float is unsupported for ZVector unless we have the
// vector-enhancements facility 1 (ISA revision 12).
if (S.getLangOpts().ZVector &&
!S.Context.getTargetInfo().hasFeature("arch12"))
S.Diag(TSTLoc, diag::err_invalid_vector_float_decl_spec);
} else if (getTypeSpecWidth() == TypeSpecifierWidth::Long) {
// vector long is unsupported for ZVector and deprecated for AltiVec.
// It has also been historically deprecated on AIX (as an alias for
// "vector int" in both 32-bit and 64-bit modes). It was then made
// unsupported in the Clang-based XL compiler since the deprecated type
// has a number of conflicting semantics and continuing to support it
// is a disservice to users.
if (S.getLangOpts().ZVector ||
S.Context.getTargetInfo().getTriple().isOSAIX())
S.Diag(TSWRange.getBegin(), diag::err_invalid_vector_long_decl_spec);
else
S.Diag(TSWRange.getBegin(),
diag::warn_vector_long_decl_spec_combination)
<< getSpecifierName((TST)TypeSpecType, Policy);
}
if (TypeAltiVecPixel) {
//TODO: perform validation
TypeSpecType = TST_int;
TypeSpecSign = static_cast<unsigned>(TypeSpecifierSign::Unsigned);
TypeSpecWidth = static_cast<unsigned>(TypeSpecifierWidth::Short);
TypeSpecOwned = false;
}
}
bool IsFixedPointType =
TypeSpecType == TST_accum || TypeSpecType == TST_fract;
// signed/unsigned are only valid with int/char/wchar_t/_Accum.
if (getTypeSpecSign() != TypeSpecifierSign::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 &&
!IsFixedPointType && TypeSpecType != TST_extint) {
S.Diag(TSSLoc, diag::err_invalid_sign_spec)
<< getSpecifierName((TST)TypeSpecType, Policy);
// signed double -> double.
TypeSpecSign = static_cast<unsigned>(TypeSpecifierSign::Unspecified);
}
}
// Validate the width of the type.
switch (getTypeSpecWidth()) {
case TypeSpecifierWidth::Unspecified:
break;
case TypeSpecifierWidth::Short: // short int
case TypeSpecifierWidth::LongLong: // long long int
if (TypeSpecType == TST_unspecified)
TypeSpecType = TST_int; // short -> short int, long long -> long long int.
else if (!(TypeSpecType == TST_int ||
(IsFixedPointType &&
getTypeSpecWidth() != TypeSpecifierWidth::LongLong))) {
S.Diag(TSWRange.getBegin(), diag::err_invalid_width_spec)
<< (int)TypeSpecWidth << getSpecifierName((TST)TypeSpecType, Policy);
TypeSpecType = TST_int;
TypeSpecSat = false;
TypeSpecOwned = false;
}
break;
case TypeSpecifierWidth::Long: // long double, long int
if (TypeSpecType == TST_unspecified)
TypeSpecType = TST_int; // long -> long int.
else if (TypeSpecType != TST_int && TypeSpecType != TST_double &&
!IsFixedPointType) {
S.Diag(TSWRange.getBegin(), diag::err_invalid_width_spec)
<< (int)TypeSpecWidth << getSpecifierName((TST)TypeSpecType, Policy);
TypeSpecType = TST_int;
TypeSpecSat = false;
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) {
S.Diag(TSCLoc, diag::ext_plain_complex)
<< FixItHint::CreateInsertion(
S.getLocForEndOfToken(getTypeSpecComplexLoc()),
" double");
TypeSpecType = TST_double; // _Complex -> _Complex double.
} else if (TypeSpecType == TST_int || TypeSpecType == TST_char ||
TypeSpecType == TST_extint) {
// Note that this intentionally doesn't include _Complex _Bool.
if (!S.getLangOpts().CPlusPlus)
S.Diag(TSTLoc, diag::ext_integer_complex);
} else if (TypeSpecType != TST_float && TypeSpecType != TST_double &&
TypeSpecType != TST_float128) {
// FIXME: _Float16, __fp16?
S.Diag(TSCLoc, diag::err_invalid_complex_spec)
<< getSpecifierName((TST)TypeSpecType, Policy);
TypeSpecComplex = TSC_unspecified;
}
}
// C11 6.7.1/3, C++11 [dcl.stc]p1, GNU TLS: __thread, thread_local and
// _Thread_local can only appear with the 'static' and 'extern' storage class
// specifiers. We also allow __private_extern__ as an extension.
if (ThreadStorageClassSpec != TSCS_unspecified) {
switch (StorageClassSpec) {
case SCS_unspecified:
case SCS_extern:
case SCS_private_extern:
case SCS_static:
break;
default:
if (S.getSourceManager().isBeforeInTranslationUnit(
getThreadStorageClassSpecLoc(), getStorageClassSpecLoc()))
S.Diag(getStorageClassSpecLoc(),
diag::err_invalid_decl_spec_combination)
<< DeclSpec::getSpecifierName(getThreadStorageClassSpec())
<< SourceRange(getThreadStorageClassSpecLoc());
else
S.Diag(getThreadStorageClassSpecLoc(),
diag::err_invalid_decl_spec_combination)
<< DeclSpec::getSpecifierName(getStorageClassSpec())
<< SourceRange(getStorageClassSpecLoc());
// Discard the thread storage class specifier to recover.
ThreadStorageClassSpec = TSCS_unspecified;
ThreadStorageClassSpecLoc = SourceLocation();
}
}
// 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.
if (S.getLangOpts().CPlusPlus &&
TypeSpecType == TST_unspecified && StorageClassSpec == SCS_auto) {
TypeSpecType = TST_auto;
StorageClassSpec = SCS_unspecified;
TSTLoc = TSTNameLoc = StorageClassSpecLoc;
StorageClassSpecLoc = SourceLocation();
}
// Diagnose if we've recovered from an ill-formed 'auto' storage class
// specifier in a pre-C++11 dialect of C++.
if (!S.getLangOpts().CPlusPlus11 && TypeSpecType == TST_auto)
S.Diag(TSTLoc, diag::ext_auto_type_specifier);
if (S.getLangOpts().CPlusPlus && !S.getLangOpts().CPlusPlus11 &&
StorageClassSpec == SCS_auto)
S.Diag(StorageClassSpecLoc, diag::warn_auto_storage_class)
<< FixItHint::CreateRemoval(StorageClassSpecLoc);
if (TypeSpecType == TST_char8)
S.Diag(TSTLoc, diag::warn_cxx17_compat_unicode_type);
else if (TypeSpecType == TST_char16 || TypeSpecType == TST_char32)
S.Diag(TSTLoc, diag::warn_cxx98_compat_unicode_type)
<< (TypeSpecType == TST_char16 ? "char16_t" : "char32_t");
if (getConstexprSpecifier() == ConstexprSpecKind::Constexpr)
S.Diag(ConstexprLoc, diag::warn_cxx98_compat_constexpr);
else if (getConstexprSpecifier() == ConstexprSpecKind::Consteval)
S.Diag(ConstexprLoc, diag::warn_cxx20_compat_consteval);
else if (getConstexprSpecifier() == ConstexprSpecKind::Constinit)
S.Diag(ConstexprLoc, diag::warn_cxx20_compat_constinit);
// C++ [class.friend]p6:
// No storage-class-specifier shall appear in the decl-specifier-seq
// of a friend declaration.
if (isFriendSpecified() &&
(getStorageClassSpec() || getThreadStorageClassSpec())) {
SmallString<32> SpecName;
SourceLocation SCLoc;
FixItHint StorageHint, ThreadHint;
if (DeclSpec::SCS SC = getStorageClassSpec()) {
SpecName = getSpecifierName(SC);
SCLoc = getStorageClassSpecLoc();
StorageHint = FixItHint::CreateRemoval(SCLoc);
}
if (DeclSpec::TSCS TSC = getThreadStorageClassSpec()) {
if (!SpecName.empty()) SpecName += " ";
SpecName += getSpecifierName(TSC);
SCLoc = getThreadStorageClassSpecLoc();
ThreadHint = FixItHint::CreateRemoval(SCLoc);
}
S.Diag(SCLoc, diag::err_friend_decl_spec)
<< SpecName << StorageHint << ThreadHint;
ClearStorageClassSpecs();
}
// C++11 [dcl.fct.spec]p5:
// The virtual specifier shall be used only in the initial
// declaration of a non-static class member function;
// C++11 [dcl.fct.spec]p6:
// The explicit specifier shall be used only in the declaration of
// a constructor or conversion function within its class
// definition;
if (isFriendSpecified() && (isVirtualSpecified() || hasExplicitSpecifier())) {
StringRef Keyword;
FixItHint Hint;
SourceLocation SCLoc;
if (isVirtualSpecified()) {
Keyword = "virtual";
SCLoc = getVirtualSpecLoc();
Hint = FixItHint::CreateRemoval(SCLoc);
} else {
Keyword = "explicit";
SCLoc = getExplicitSpecLoc();
Hint = FixItHint::CreateRemoval(getExplicitSpecRange());
}
S.Diag(SCLoc, diag::err_friend_decl_spec)
<< Keyword << Hint;
FS_virtual_specified = false;
FS_explicit_specifier = ExplicitSpecifier();
FS_virtualLoc = FS_explicitLoc = SourceLocation();
}
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() != nullptr &&
StorageClassSpec != DeclSpec::SCS_typedef;
}
void UnqualifiedId::setOperatorFunctionId(SourceLocation OperatorLoc,
OverloadedOperatorKind Op,
SourceLocation SymbolLocations[3]) {
Kind = UnqualifiedIdKind::IK_OperatorFunctionId;
StartLocation = OperatorLoc;
EndLocation = OperatorLoc;
new (&OperatorFunctionId) struct OFI;
OperatorFunctionId.Operator = Op;
for (unsigned I = 0; I != 3; ++I) {
OperatorFunctionId.SymbolLocations[I] = SymbolLocations[I];
if (SymbolLocations[I].isValid())
EndLocation = SymbolLocations[I];
}
}
bool VirtSpecifiers::SetSpecifier(Specifier VS, SourceLocation Loc,
const char *&PrevSpec) {
if (!FirstLocation.isValid())
FirstLocation = Loc;
LastLocation = Loc;
LastSpecifier = VS;
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_GNU_Final:
case VS_Sealed:
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";
case VS_GNU_Final: return "__final";
case VS_Sealed: return "sealed";
}
}