Google Git
Sign in
llvm / clang / 36a094aaa20f6951a530e9bf0250d9afcf8a341b / . / lib / AST / Type.cpp
blob: 4d54ea1061edcd1003dcb5b7e9e0ce21fd670ff8 [file] [log] [blame]
//===- Type.cpp - Type representation and manipulation --------------------===//
//
// 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 type-related functionality.
//
//===----------------------------------------------------------------------===//
#include "clang/AST/Type.h"
#include "Linkage.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/Attr.h"
#include "clang/AST/CharUnits.h"
#include "clang/AST/Decl.h"
#include "clang/AST/DeclBase.h"
#include "clang/AST/DeclCXX.h"
#include "clang/AST/DeclObjC.h"
#include "clang/AST/DeclTemplate.h"
#include "clang/AST/Expr.h"
#include "clang/AST/NestedNameSpecifier.h"
#include "clang/AST/NonTrivialTypeVisitor.h"
#include "clang/AST/PrettyPrinter.h"
#include "clang/AST/TemplateBase.h"
#include "clang/AST/TemplateName.h"
#include "clang/AST/TypeVisitor.h"
#include "clang/Basic/AddressSpaces.h"
#include "clang/Basic/ExceptionSpecificationType.h"
#include "clang/Basic/IdentifierTable.h"
#include "clang/Basic/LLVM.h"
#include "clang/Basic/LangOptions.h"
#include "clang/Basic/Linkage.h"
#include "clang/Basic/Specifiers.h"
#include "clang/Basic/TargetCXXABI.h"
#include "clang/Basic/TargetInfo.h"
#include "clang/Basic/Visibility.h"
#include "llvm/ADT/APInt.h"
#include "llvm/ADT/APSInt.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/FoldingSet.h"
#include "llvm/ADT/None.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/MathExtras.h"
#include <algorithm>
#include <cassert>
#include <cstdint>
#include <cstring>
#include <type_traits>
using namespace clang;
bool Qualifiers::isStrictSupersetOf(Qualifiers Other) const {
return (*this != Other) &&
// CVR qualifiers superset
(((Mask & CVRMask) | (Other.Mask & CVRMask)) == (Mask & CVRMask)) &&
// ObjC GC qualifiers superset
((getObjCGCAttr() == Other.getObjCGCAttr()) ||
(hasObjCGCAttr() && !Other.hasObjCGCAttr())) &&
// Address space superset.
((getAddressSpace() == Other.getAddressSpace()) ||
(hasAddressSpace()&& !Other.hasAddressSpace())) &&
// Lifetime qualifier superset.
((getObjCLifetime() == Other.getObjCLifetime()) ||
(hasObjCLifetime() && !Other.hasObjCLifetime()));
}
const IdentifierInfo* QualType::getBaseTypeIdentifier() const {
const Type* ty = getTypePtr();
NamedDecl *ND = nullptr;
if (ty->isPointerType() || ty->isReferenceType())
return ty->getPointeeType().getBaseTypeIdentifier();
else if (ty->isRecordType())
ND = ty->castAs<RecordType>()->getDecl();
else if (ty->isEnumeralType())
ND = ty->castAs<EnumType>()->getDecl();
else if (ty->getTypeClass() == Type::Typedef)
ND = ty->castAs<TypedefType>()->getDecl();
else if (ty->isArrayType())
return ty->castAsArrayTypeUnsafe()->
getElementType().getBaseTypeIdentifier();
if (ND)
return ND->getIdentifier();
return nullptr;
}
bool QualType::mayBeDynamicClass() const {
const auto *ClassDecl = getTypePtr()->getPointeeCXXRecordDecl();
return ClassDecl && ClassDecl->mayBeDynamicClass();
}
bool QualType::mayBeNotDynamicClass() const {
const auto *ClassDecl = getTypePtr()->getPointeeCXXRecordDecl();
return !ClassDecl || ClassDecl->mayBeNonDynamicClass();
}
bool QualType::isConstant(QualType T, const ASTContext &Ctx) {
if (T.isConstQualified())
return true;
if (const ArrayType *AT = Ctx.getAsArrayType(T))
return AT->getElementType().isConstant(Ctx);
return T.getAddressSpace() == LangAS::opencl_constant;
}
// C++ [temp.dep.type]p1:
// A type is dependent if it is...
// - an array type constructed from any dependent type or whose
// size is specified by a constant expression that is
// value-dependent,
ArrayType::ArrayType(TypeClass tc, QualType et, QualType can,
ArraySizeModifier sm, unsigned tq, const Expr *sz)
// Note, we need to check for DependentSizedArrayType explicitly here
// because we use a DependentSizedArrayType with no size expression as the
// type of a dependent array of unknown bound with a dependent braced
// initializer:
//
// template<int ...N> int arr[] = {N...};
: Type(tc, can,
et->isDependentType() || (sz && sz->isValueDependent()) ||
tc == DependentSizedArray,
et->isInstantiationDependentType() ||
(sz && sz->isInstantiationDependent()) ||
tc == DependentSizedArray,
(tc == VariableArray || et->isVariablyModifiedType()),
et->containsUnexpandedParameterPack() ||
(sz && sz->containsUnexpandedParameterPack())),
ElementType(et) {
ArrayTypeBits.IndexTypeQuals = tq;
ArrayTypeBits.SizeModifier = sm;
}
unsigned ConstantArrayType::getNumAddressingBits(const ASTContext &Context,
QualType ElementType,
const llvm::APInt &NumElements) {
uint64_t ElementSize = Context.getTypeSizeInChars(ElementType).getQuantity();
// Fast path the common cases so we can avoid the conservative computation
// below, which in common cases allocates "large" APSInt values, which are
// slow.
// If the element size is a power of 2, we can directly compute the additional
// number of addressing bits beyond those required for the element count.
if (llvm::isPowerOf2_64(ElementSize)) {
return NumElements.getActiveBits() + llvm::Log2_64(ElementSize);
}
// If both the element count and element size fit in 32-bits, we can do the
// computation directly in 64-bits.
if ((ElementSize >> 32) == 0 && NumElements.getBitWidth() <= 64 &&
(NumElements.getZExtValue() >> 32) == 0) {
uint64_t TotalSize = NumElements.getZExtValue() * ElementSize;
return 64 - llvm::countLeadingZeros(TotalSize);
}
// Otherwise, use APSInt to handle arbitrary sized values.
llvm::APSInt SizeExtended(NumElements, true);
unsigned SizeTypeBits = Context.getTypeSize(Context.getSizeType());
SizeExtended = SizeExtended.extend(std::max(SizeTypeBits,
SizeExtended.getBitWidth()) * 2);
llvm::APSInt TotalSize(llvm::APInt(SizeExtended.getBitWidth(), ElementSize));
TotalSize *= SizeExtended;
return TotalSize.getActiveBits();
}
unsigned ConstantArrayType::getMaxSizeBits(const ASTContext &Context) {
unsigned Bits = Context.getTypeSize(Context.getSizeType());
// Limit the number of bits in size_t so that maximal bit size fits 64 bit
// integer (see PR8256). We can do this as currently there is no hardware
// that supports full 64-bit virtual space.
if (Bits > 61)
Bits = 61;
return Bits;
}
void ConstantArrayType::Profile(llvm::FoldingSetNodeID &ID,
const ASTContext &Context, QualType ET,
const llvm::APInt &ArraySize,
const Expr *SizeExpr, ArraySizeModifier SizeMod,
unsigned TypeQuals) {
ID.AddPointer(ET.getAsOpaquePtr());
ID.AddInteger(ArraySize.getZExtValue());
ID.AddInteger(SizeMod);
ID.AddInteger(TypeQuals);
ID.AddBoolean(SizeExpr != 0);
if (SizeExpr)
SizeExpr->Profile(ID, Context, true);
}
DependentSizedArrayType::DependentSizedArrayType(const ASTContext &Context,
QualType et, QualType can,
Expr *e, ArraySizeModifier sm,
unsigned tq,
SourceRange brackets)
: ArrayType(DependentSizedArray, et, can, sm, tq, e),
Context(Context), SizeExpr((Stmt*) e), Brackets(brackets) {}
void DependentSizedArrayType::Profile(llvm::FoldingSetNodeID &ID,
const ASTContext &Context,
QualType ET,
ArraySizeModifier SizeMod,
unsigned TypeQuals,
Expr *E) {
ID.AddPointer(ET.getAsOpaquePtr());
ID.AddInteger(SizeMod);
ID.AddInteger(TypeQuals);
E->Profile(ID, Context, true);
}
DependentVectorType::DependentVectorType(
const ASTContext &Context, QualType ElementType, QualType CanonType,
Expr *SizeExpr, SourceLocation Loc, VectorType::VectorKind VecKind)
: Type(DependentVector, CanonType, /*Dependent=*/true,
/*InstantiationDependent=*/true,
ElementType->isVariablyModifiedType(),
ElementType->containsUnexpandedParameterPack() ||
(SizeExpr && SizeExpr->containsUnexpandedParameterPack())),
Context(Context), ElementType(ElementType), SizeExpr(SizeExpr), Loc(Loc) {
VectorTypeBits.VecKind = VecKind;
}
void DependentVectorType::Profile(llvm::FoldingSetNodeID &ID,
const ASTContext &Context,
QualType ElementType, const Expr *SizeExpr,
VectorType::VectorKind VecKind) {
ID.AddPointer(ElementType.getAsOpaquePtr());
ID.AddInteger(VecKind);
SizeExpr->Profile(ID, Context, true);
}
DependentSizedExtVectorType::DependentSizedExtVectorType(const
ASTContext &Context,
QualType ElementType,
QualType can,
Expr *SizeExpr,
SourceLocation loc)
: Type(DependentSizedExtVector, can, /*Dependent=*/true,
/*InstantiationDependent=*/true,
ElementType->isVariablyModifiedType(),
(ElementType->containsUnexpandedParameterPack() ||
(SizeExpr && SizeExpr->containsUnexpandedParameterPack()))),
Context(Context), SizeExpr(SizeExpr), ElementType(ElementType),
loc(loc) {}
void
DependentSizedExtVectorType::Profile(llvm::FoldingSetNodeID &ID,
const ASTContext &Context,
QualType ElementType, Expr *SizeExpr) {
ID.AddPointer(ElementType.getAsOpaquePtr());
SizeExpr->Profile(ID, Context, true);
}
DependentAddressSpaceType::DependentAddressSpaceType(
const ASTContext &Context, QualType PointeeType, QualType can,
Expr *AddrSpaceExpr, SourceLocation loc)
: Type(DependentAddressSpace, can, /*Dependent=*/true,
/*InstantiationDependent=*/true,
PointeeType->isVariablyModifiedType(),
(PointeeType->containsUnexpandedParameterPack() ||
(AddrSpaceExpr &&
AddrSpaceExpr->containsUnexpandedParameterPack()))),
Context(Context), AddrSpaceExpr(AddrSpaceExpr), PointeeType(PointeeType),
loc(loc) {}
void DependentAddressSpaceType::Profile(llvm::FoldingSetNodeID &ID,
const ASTContext &Context,
QualType PointeeType,
Expr *AddrSpaceExpr) {
ID.AddPointer(PointeeType.getAsOpaquePtr());
AddrSpaceExpr->Profile(ID, Context, true);
}
VectorType::VectorType(QualType vecType, unsigned nElements, QualType canonType,
VectorKind vecKind)
: VectorType(Vector, vecType, nElements, canonType, vecKind) {}
VectorType::VectorType(TypeClass tc, QualType vecType, unsigned nElements,
QualType canonType, VectorKind vecKind)
: Type(tc, canonType, vecType->isDependentType(),
vecType->isInstantiationDependentType(),
vecType->isVariablyModifiedType(),
vecType->containsUnexpandedParameterPack()),
ElementType(vecType) {
VectorTypeBits.VecKind = vecKind;
VectorTypeBits.NumElements = nElements;
}
/// getArrayElementTypeNoTypeQual - If this is an array type, return the
/// element type of the array, potentially with type qualifiers missing.
/// This method should never be used when type qualifiers are meaningful.
const Type *Type::getArrayElementTypeNoTypeQual() const {
// If this is directly an array type, return it.
if (const auto *ATy = dyn_cast<ArrayType>(this))
return ATy->getElementType().getTypePtr();
// If the canonical form of this type isn't the right kind, reject it.
if (!isa<ArrayType>(CanonicalType))
return nullptr;
// If this is a typedef for an array type, strip the typedef off without
// losing all typedef information.
return cast<ArrayType>(getUnqualifiedDesugaredType())
->getElementType().getTypePtr();
}
/// getDesugaredType - Return the specified type with any "sugar" removed from
/// the type. This takes off typedefs, typeof's etc. If the outer level of
/// the type is already concrete, it returns it unmodified. This is similar
/// to getting the canonical type, but it doesn't remove *all* typedefs. For
/// example, it returns "T*" as "T*", (not as "int*"), because the pointer is
/// concrete.
QualType QualType::getDesugaredType(QualType T, const ASTContext &Context) {
SplitQualType split = getSplitDesugaredType(T);
return Context.getQualifiedType(split.Ty, split.Quals);
}
QualType QualType::getSingleStepDesugaredTypeImpl(QualType type,
const ASTContext &Context) {
SplitQualType split = type.split();
QualType desugar = split.Ty->getLocallyUnqualifiedSingleStepDesugaredType();
return Context.getQualifiedType(desugar, split.Quals);
}
// Check that no type class is polymorphic. LLVM style RTTI should be used
// instead. If absolutely needed an exception can still be added here by
// defining the appropriate macro (but please don't do this).
#define TYPE(CLASS, BASE) \
static_assert(!std::is_polymorphic<CLASS##Type>::value, \
#CLASS "Type should not be polymorphic!");
#include "clang/AST/TypeNodes.inc"
// Check that no type class has a non-trival destructor. Types are
// allocated with the BumpPtrAllocator from ASTContext and therefore
// their destructor is not executed.
//
// FIXME: ConstantArrayType is not trivially destructible because of its
// APInt member. It should be replaced in favor of ASTContext allocation.
#define TYPE(CLASS, BASE) \
static_assert(std::is_trivially_destructible<CLASS##Type>::value || \
std::is_same<CLASS##Type, ConstantArrayType>::value, \
#CLASS "Type should be trivially destructible!");
#include "clang/AST/TypeNodes.inc"
QualType Type::getLocallyUnqualifiedSingleStepDesugaredType() const {
switch (getTypeClass()) {
#define ABSTRACT_TYPE(Class, Parent)
#define TYPE(Class, Parent) \
case Type::Class: { \
const auto *ty = cast<Class##Type>(this); \
if (!ty->isSugared()) return QualType(ty, 0); \
return ty->desugar(); \
}
#include "clang/AST/TypeNodes.inc"
}
llvm_unreachable("bad type kind!");
}
SplitQualType QualType::getSplitDesugaredType(QualType T) {
QualifierCollector Qs;
QualType Cur = T;
while (true) {
const Type *CurTy = Qs.strip(Cur);
switch (CurTy->getTypeClass()) {
#define ABSTRACT_TYPE(Class, Parent)
#define TYPE(Class, Parent) \
case Type::Class: { \
const auto *Ty = cast<Class##Type>(CurTy); \
if (!Ty->isSugared()) \
return SplitQualType(Ty, Qs); \
Cur = Ty->desugar(); \
break; \
}
#include "clang/AST/TypeNodes.inc"
}
}
}
SplitQualType QualType::getSplitUnqualifiedTypeImpl(QualType type) {
SplitQualType split = type.split();
// All the qualifiers we've seen so far.
Qualifiers quals = split.Quals;
// The last type node we saw with any nodes inside it.
const Type *lastTypeWithQuals = split.Ty;
while (true) {
QualType next;
// Do a single-step desugar, aborting the loop if the type isn't
// sugared.
switch (split.Ty->getTypeClass()) {
#define ABSTRACT_TYPE(Class, Parent)
#define TYPE(Class, Parent) \
case Type::Class: { \
const auto *ty = cast<Class##Type>(split.Ty); \
if (!ty->isSugared()) goto done; \
next = ty->desugar(); \
break; \
}
#include "clang/AST/TypeNodes.inc"
}
// Otherwise, split the underlying type. If that yields qualifiers,
// update the information.
split = next.split();
if (!split.Quals.empty()) {
lastTypeWithQuals = split.Ty;
quals.addConsistentQualifiers(split.Quals);
}
}
done:
return SplitQualType(lastTypeWithQuals, quals);
}
QualType QualType::IgnoreParens(QualType T) {
// FIXME: this seems inherently un-qualifiers-safe.
while (const auto *PT = T->getAs<ParenType>())
T = PT->getInnerType();
return T;
}
/// This will check for a T (which should be a Type which can act as
/// sugar, such as a TypedefType) by removing any existing sugar until it
/// reaches a T or a non-sugared type.
template<typename T> static const T *getAsSugar(const Type *Cur) {
while (true) {
if (const auto *Sugar = dyn_cast<T>(Cur))
return Sugar;
switch (Cur->getTypeClass()) {
#define ABSTRACT_TYPE(Class, Parent)
#define TYPE(Class, Parent) \
case Type::Class: { \
const auto *Ty = cast<Class##Type>(Cur); \
if (!Ty->isSugared()) return 0; \
Cur = Ty->desugar().getTypePtr(); \
break; \
}
#include "clang/AST/TypeNodes.inc"
}
}
}
template <> const TypedefType *Type::getAs() const {
return getAsSugar<TypedefType>(this);
}
template <> const TemplateSpecializationType *Type::getAs() const {
return getAsSugar<TemplateSpecializationType>(this);
}
template <> const AttributedType *Type::getAs() const {
return getAsSugar<AttributedType>(this);
}
/// getUnqualifiedDesugaredType - Pull any qualifiers and syntactic
/// sugar off the given type. This should produce an object of the
/// same dynamic type as the canonical type.
const Type *Type::getUnqualifiedDesugaredType() const {
const Type *Cur = this;
while (true) {
switch (Cur->getTypeClass()) {
#define ABSTRACT_TYPE(Class, Parent)
#define TYPE(Class, Parent) \
case Class: { \
const auto *Ty = cast<Class##Type>(Cur); \
if (!Ty->isSugared()) return Cur; \
Cur = Ty->desugar().getTypePtr(); \
break; \
}
#include "clang/AST/TypeNodes.inc"
}
}
}
bool Type::isClassType() const {
if (const auto *RT = getAs<RecordType>())
return RT->getDecl()->isClass();
return false;
}
bool Type::isStructureType() const {
if (const auto *RT = getAs<RecordType>())
return RT->getDecl()->isStruct();
return false;
}
bool Type::isObjCBoxableRecordType() const {
if (const auto *RT = getAs<RecordType>())
return RT->getDecl()->hasAttr<ObjCBoxableAttr>();
return false;
}
bool Type::isInterfaceType() const {
if (const auto *RT = getAs<RecordType>())
return RT->getDecl()->isInterface();
return false;
}
bool Type::isStructureOrClassType() const {
if (const auto *RT = getAs<RecordType>()) {
RecordDecl *RD = RT->getDecl();
return RD->isStruct() || RD->isClass() || RD->isInterface();
}
return false;
}
bool Type::isVoidPointerType() const {
if (const auto *PT = getAs<PointerType>())
return PT->getPointeeType()->isVoidType();
return false;
}
bool Type::isUnionType() const {
if (const auto *RT = getAs<RecordType>())
return RT->getDecl()->isUnion();
return false;
}
bool Type::isComplexType() const {
if (const auto *CT = dyn_cast<ComplexType>(CanonicalType))
return CT->getElementType()->isFloatingType();
return false;
}
bool Type::isComplexIntegerType() const {
// Check for GCC complex integer extension.
return getAsComplexIntegerType();
}
bool Type::isScopedEnumeralType() const {
if (const auto *ET = getAs<EnumType>())
return ET->getDecl()->isScoped();
return false;
}
const ComplexType *Type::getAsComplexIntegerType() const {
if (const auto *Complex = getAs<ComplexType>())
if (Complex->getElementType()->isIntegerType())
return Complex;
return nullptr;
}
QualType Type::getPointeeType() const {
if (const auto *PT = getAs<PointerType>())
return PT->getPointeeType();
if (const auto *OPT = getAs<ObjCObjectPointerType>())
return OPT->getPointeeType();
if (const auto *BPT = getAs<BlockPointerType>())
return BPT->getPointeeType();
if (const auto *RT = getAs<ReferenceType>())
return RT->getPointeeType();
if (const auto *MPT = getAs<MemberPointerType>())
return MPT->getPointeeType();
if (const auto *DT = getAs<DecayedType>())
return DT->getPointeeType();
return {};
}
const RecordType *Type::getAsStructureType() const {
// If this is directly a structure type, return it.
if (const auto *RT = dyn_cast<RecordType>(this)) {
if (RT->getDecl()->isStruct())
return RT;
}
// If the canonical form of this type isn't the right kind, reject it.
if (const auto *RT = dyn_cast<RecordType>(CanonicalType)) {
if (!RT->getDecl()->isStruct())
return nullptr;
// If this is a typedef for a structure type, strip the typedef off without
// losing all typedef information.
return cast<RecordType>(getUnqualifiedDesugaredType());
}
return nullptr;
}
const RecordType *Type::getAsUnionType() const {
// If this is directly a union type, return it.
if (const auto *RT = dyn_cast<RecordType>(this)) {
if (RT->getDecl()->isUnion())
return RT;
}
// If the canonical form of this type isn't the right kind, reject it.
if (const auto *RT = dyn_cast<RecordType>(CanonicalType)) {
if (!RT->getDecl()->isUnion())
return nullptr;
// If this is a typedef for a union type, strip the typedef off without
// losing all typedef information.
return cast<RecordType>(getUnqualifiedDesugaredType());
}
return nullptr;
}
bool Type::isObjCIdOrObjectKindOfType(const ASTContext &ctx,
const ObjCObjectType *&bound) const {
bound = nullptr;
const auto *OPT = getAs<ObjCObjectPointerType>();
if (!OPT)
return false;
// Easy case: id.
if (OPT->isObjCIdType())
return true;
// If it's not a __kindof type, reject it now.
if (!OPT->isKindOfType())
return false;
// If it's Class or qualified Class, it's not an object type.
if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType())
return false;
// Figure out the type bound for the __kindof type.
bound = OPT->getObjectType()->stripObjCKindOfTypeAndQuals(ctx)
->getAs<ObjCObjectType>();
return true;
}
bool Type::isObjCClassOrClassKindOfType() const {
const auto *OPT = getAs<ObjCObjectPointerType>();
if (!OPT)
return false;
// Easy case: Class.
if (OPT->isObjCClassType())
return true;
// If it's not a __kindof type, reject it now.
if (!OPT->isKindOfType())
return false;
// If it's Class or qualified Class, it's a class __kindof type.
return OPT->isObjCClassType() || OPT->isObjCQualifiedClassType();
}
ObjCTypeParamType::ObjCTypeParamType(const ObjCTypeParamDecl *D,
QualType can,
ArrayRef<ObjCProtocolDecl *> protocols)
: Type(ObjCTypeParam, can, can->isDependentType(),
can->isInstantiationDependentType(),
can->isVariablyModifiedType(),
/*ContainsUnexpandedParameterPack=*/false),
OTPDecl(const_cast<ObjCTypeParamDecl*>(D)) {
initialize(protocols);
}
QualType ObjCTypeParamType::desugar() const {
return getDecl()->getUnderlyingType();
}
ObjCObjectType::ObjCObjectType(QualType Canonical, QualType Base,
ArrayRef<QualType> typeArgs,
ArrayRef<ObjCProtocolDecl *> protocols,
bool isKindOf)
: Type(ObjCObject, Canonical, Base->isDependentType(),
Base->isInstantiationDependentType(),
Base->isVariablyModifiedType(),
Base->containsUnexpandedParameterPack()),
BaseType(Base) {
ObjCObjectTypeBits.IsKindOf = isKindOf;
ObjCObjectTypeBits.NumTypeArgs = typeArgs.size();
assert(getTypeArgsAsWritten().size() == typeArgs.size() &&
"bitfield overflow in type argument count");
if (!typeArgs.empty())
memcpy(getTypeArgStorage(), typeArgs.data(),
typeArgs.size() * sizeof(QualType));
for (auto typeArg : typeArgs) {
if (typeArg->isDependentType())
setDependent();
else if (typeArg->isInstantiationDependentType())
setInstantiationDependent();
if (typeArg->containsUnexpandedParameterPack())
setContainsUnexpandedParameterPack();
}
// Initialize the protocol qualifiers. The protocol storage is known
// after we set number of type arguments.
initialize(protocols);
}
bool ObjCObjectType::isSpecialized() const {
// If we have type arguments written here, the type is specialized.
if (ObjCObjectTypeBits.NumTypeArgs > 0)
return true;
// Otherwise, check whether the base type is specialized.
if (const auto objcObject = getBaseType()->getAs<ObjCObjectType>()) {
// Terminate when we reach an interface type.
if (isa<ObjCInterfaceType>(objcObject))
return false;
return objcObject->isSpecialized();
}
// Not specialized.
return false;
}
ArrayRef<QualType> ObjCObjectType::getTypeArgs() const {
// We have type arguments written on this type.
if (isSpecializedAsWritten())
return getTypeArgsAsWritten();
// Look at the base type, which might have type arguments.
if (const auto objcObject = getBaseType()->getAs<ObjCObjectType>()) {
// Terminate when we reach an interface type.
if (isa<ObjCInterfaceType>(objcObject))
return {};
return objcObject->getTypeArgs();
}
// No type arguments.
return {};
}
bool ObjCObjectType::isKindOfType() const {
if (isKindOfTypeAsWritten())
return true;
// Look at the base type, which might have type arguments.
if (const auto objcObject = getBaseType()->getAs<ObjCObjectType>()) {
// Terminate when we reach an interface type.
if (isa<ObjCInterfaceType>(objcObject))
return false;
return objcObject->isKindOfType();
}
// Not a "__kindof" type.
return false;
}
QualType ObjCObjectType::stripObjCKindOfTypeAndQuals(
const ASTContext &ctx) const {
if (!isKindOfType() && qual_empty())
return QualType(this, 0);
// Recursively strip __kindof.
SplitQualType splitBaseType = getBaseType().split();
QualType baseType(splitBaseType.Ty, 0);
if (const auto *baseObj = splitBaseType.Ty->getAs<ObjCObjectType>())
baseType = baseObj->stripObjCKindOfTypeAndQuals(ctx);
return ctx.getObjCObjectType(ctx.getQualifiedType(baseType,
splitBaseType.Quals),
getTypeArgsAsWritten(),
/*protocols=*/{},
/*isKindOf=*/false);
}
const ObjCObjectPointerType *ObjCObjectPointerType::stripObjCKindOfTypeAndQuals(
const ASTContext &ctx) const {
if (!isKindOfType() && qual_empty())
return this;
QualType obj = getObjectType()->stripObjCKindOfTypeAndQuals(ctx);
return ctx.getObjCObjectPointerType(obj)->castAs<ObjCObjectPointerType>();
}
namespace {
/// Visitor used to perform a simple type transformation that does not change
/// the semantics of the type.
template <typename Derived>
struct SimpleTransformVisitor : public TypeVisitor<Derived, QualType> {
ASTContext &Ctx;
QualType recurse(QualType type) {
// Split out the qualifiers from the type.
SplitQualType splitType = type.split();
// Visit the type itself.
QualType result = static_cast<Derived *>(this)->Visit(splitType.Ty);
if (result.isNull())
return result;
// Reconstruct the transformed type by applying the local qualifiers
// from the split type.
return Ctx.getQualifiedType(result, splitType.Quals);
}
public:
explicit SimpleTransformVisitor(ASTContext &ctx) : Ctx(ctx) {}
// None of the clients of this transformation can occur where
// there are dependent types, so skip dependent types.
#define TYPE(Class, Base)
#define DEPENDENT_TYPE(Class, Base) \
QualType Visit##Class##Type(const Class##Type *T) { return QualType(T, 0); }
#include "clang/AST/TypeNodes.inc"
#define TRIVIAL_TYPE_CLASS(Class) \
QualType Visit##Class##Type(const Class##Type *T) { return QualType(T, 0); }
#define SUGARED_TYPE_CLASS(Class) \
QualType Visit##Class##Type(const Class##Type *T) { \
if (!T->isSugared()) \
return QualType(T, 0); \
QualType desugaredType = recurse(T->desugar()); \
if (desugaredType.isNull()) \
return {}; \
if (desugaredType.getAsOpaquePtr() == T->desugar().getAsOpaquePtr()) \
return QualType(T, 0); \
return desugaredType; \
}
TRIVIAL_TYPE_CLASS(Builtin)
QualType VisitComplexType(const ComplexType *T) {
QualType elementType = recurse(T->getElementType());
if (elementType.isNull())
return {};
if (elementType.getAsOpaquePtr() == T->getElementType().getAsOpaquePtr())
return QualType(T, 0);
return Ctx.getComplexType(elementType);
}
QualType VisitPointerType(const PointerType *T) {
QualType pointeeType = recurse(T->getPointeeType());
if (pointeeType.isNull())
return {};
if (pointeeType.getAsOpaquePtr() == T->getPointeeType().getAsOpaquePtr())
return QualType(T, 0);
return Ctx.getPointerType(pointeeType);
}
QualType VisitBlockPointerType(const BlockPointerType *T) {
QualType pointeeType = recurse(T->getPointeeType());
if (pointeeType.isNull())
return {};
if (pointeeType.getAsOpaquePtr() == T->getPointeeType().getAsOpaquePtr())
return QualType(T, 0);
return Ctx.getBlockPointerType(pointeeType);
}
QualType VisitLValueReferenceType(const LValueReferenceType *T) {
QualType pointeeType = recurse(T->getPointeeTypeAsWritten());
if (pointeeType.isNull())
return {};
if (pointeeType.getAsOpaquePtr()
== T->getPointeeTypeAsWritten().getAsOpaquePtr())
return QualType(T, 0);
return Ctx.getLValueReferenceType(pointeeType, T->isSpelledAsLValue());
}
QualType VisitRValueReferenceType(const RValueReferenceType *T) {
QualType pointeeType = recurse(T->getPointeeTypeAsWritten());
if (pointeeType.isNull())
return {};
if (pointeeType.getAsOpaquePtr()
== T->getPointeeTypeAsWritten().getAsOpaquePtr())
return QualType(T, 0);
return Ctx.getRValueReferenceType(pointeeType);
}
QualType VisitMemberPointerType(const MemberPointerType *T) {
QualType pointeeType = recurse(T->getPointeeType());
if (pointeeType.isNull())
return {};
if (pointeeType.getAsOpaquePtr() == T->getPointeeType().getAsOpaquePtr())
return QualType(T, 0);
return Ctx.getMemberPointerType(pointeeType, T->getClass());
}
QualType VisitConstantArrayType(const ConstantArrayType *T) {
QualType elementType = recurse(T->getElementType());
if (elementType.isNull())
return {};
if (elementType.getAsOpaquePtr() == T->getElementType().getAsOpaquePtr())
return QualType(T, 0);
return Ctx.getConstantArrayType(elementType, T->getSize(), T->getSizeExpr(),
T->getSizeModifier(),
T->getIndexTypeCVRQualifiers());
}
QualType VisitVariableArrayType(const VariableArrayType *T) {
QualType elementType = recurse(T->getElementType());
if (elementType.isNull())
return {};
if (elementType.getAsOpaquePtr() == T->getElementType().getAsOpaquePtr())
return QualType(T, 0);
return Ctx.getVariableArrayType(elementType, T->getSizeExpr(),
T->getSizeModifier(),
T->getIndexTypeCVRQualifiers(),
T->getBracketsRange());
}
QualType VisitIncompleteArrayType(const IncompleteArrayType *T) {
QualType elementType = recurse(T->getElementType());
if (elementType.isNull())
return {};
if (elementType.getAsOpaquePtr() == T->getElementType().getAsOpaquePtr())
return QualType(T, 0);
return Ctx.getIncompleteArrayType(elementType, T->getSizeModifier(),
T->getIndexTypeCVRQualifiers());
}
QualType VisitVectorType(const VectorType *T) {
QualType elementType = recurse(T->getElementType());
if (elementType.isNull())
return {};
if (elementType.getAsOpaquePtr() == T->getElementType().getAsOpaquePtr())
return QualType(T, 0);
return Ctx.getVectorType(elementType, T->getNumElements(),
T->getVectorKind());
}
QualType VisitExtVectorType(const ExtVectorType *T) {
QualType elementType = recurse(T->getElementType());
if (elementType.isNull())
return {};
if (elementType.getAsOpaquePtr() == T->getElementType().getAsOpaquePtr())
return QualType(T, 0);
return Ctx.getExtVectorType(elementType, T->getNumElements());
}
QualType VisitFunctionNoProtoType(const FunctionNoProtoType *T) {
QualType returnType = recurse(T->getReturnType());
if (returnType.isNull())
return {};
if (returnType.getAsOpaquePtr() == T->getReturnType().getAsOpaquePtr())
return QualType(T, 0);
return Ctx.getFunctionNoProtoType(returnType, T->getExtInfo());
}
QualType VisitFunctionProtoType(const FunctionProtoType *T) {
QualType returnType = recurse(T->getReturnType());
if (returnType.isNull())
return {};
// Transform parameter types.
SmallVector<QualType, 4> paramTypes;
bool paramChanged = false;
for (auto paramType : T->getParamTypes()) {
QualType newParamType = recurse(paramType);
if (newParamType.isNull())
return {};
if (newParamType.getAsOpaquePtr() != paramType.getAsOpaquePtr())
paramChanged = true;
paramTypes.push_back(newParamType);
}
// Transform extended info.
FunctionProtoType::ExtProtoInfo info = T->getExtProtoInfo();
bool exceptionChanged = false;
if (info.ExceptionSpec.Type == EST_Dynamic) {
SmallVector<QualType, 4> exceptionTypes;
for (auto exceptionType : info.ExceptionSpec.Exceptions) {
QualType newExceptionType = recurse(exceptionType);
if (newExceptionType.isNull())
return {};
if (newExceptionType.getAsOpaquePtr() != exceptionType.getAsOpaquePtr())
exceptionChanged = true;
exceptionTypes.push_back(newExceptionType);
}
if (exceptionChanged) {
info.ExceptionSpec.Exceptions =
llvm::makeArrayRef(exceptionTypes).copy(Ctx);
}
}
if (returnType.getAsOpaquePtr() == T->getReturnType().getAsOpaquePtr() &&
!paramChanged && !exceptionChanged)
return QualType(T, 0);
return Ctx.getFunctionType(returnType, paramTypes, info);
}
QualType VisitParenType(const ParenType *T) {
QualType innerType = recurse(T->getInnerType());
if (innerType.isNull())
return {};
if (innerType.getAsOpaquePtr() == T->getInnerType().getAsOpaquePtr())
return QualType(T, 0);
return Ctx.getParenType(innerType);
}
SUGARED_TYPE_CLASS(Typedef)
SUGARED_TYPE_CLASS(ObjCTypeParam)
SUGARED_TYPE_CLASS(MacroQualified)
QualType VisitAdjustedType(const AdjustedType *T) {
QualType originalType = recurse(T->getOriginalType());
if (originalType.isNull())
return {};
QualType adjustedType = recurse(T->getAdjustedType());
if (adjustedType.isNull())
return {};
if (originalType.getAsOpaquePtr()
== T->getOriginalType().getAsOpaquePtr() &&
adjustedType.getAsOpaquePtr() == T->getAdjustedType().getAsOpaquePtr())
return QualType(T, 0);
return Ctx.getAdjustedType(originalType, adjustedType);
}
QualType VisitDecayedType(const DecayedType *T) {
QualType originalType = recurse(T->getOriginalType());
if (originalType.isNull())
return {};
if (originalType.getAsOpaquePtr()
== T->getOriginalType().getAsOpaquePtr())
return QualType(T, 0);
return Ctx.getDecayedType(originalType);
}
SUGARED_TYPE_CLASS(TypeOfExpr)
SUGARED_TYPE_CLASS(TypeOf)
SUGARED_TYPE_CLASS(Decltype)
SUGARED_TYPE_CLASS(UnaryTransform)
TRIVIAL_TYPE_CLASS(Record)
TRIVIAL_TYPE_CLASS(Enum)
// FIXME: Non-trivial to implement, but important for C++
SUGARED_TYPE_CLASS(Elaborated)
QualType VisitAttributedType(const AttributedType *T) {
QualType modifiedType = recurse(T->getModifiedType());
if (modifiedType.isNull())
return {};
QualType equivalentType = recurse(T->getEquivalentType());
if (equivalentType.isNull())
return {};
if (modifiedType.getAsOpaquePtr()
== T->getModifiedType().getAsOpaquePtr() &&
equivalentType.getAsOpaquePtr()
== T->getEquivalentType().getAsOpaquePtr())
return QualType(T, 0);
return Ctx.getAttributedType(T->getAttrKind(), modifiedType,
equivalentType);
}
QualType VisitSubstTemplateTypeParmType(const SubstTemplateTypeParmType *T) {
QualType replacementType = recurse(T->getReplacementType());
if (replacementType.isNull())
return {};
if (replacementType.getAsOpaquePtr()
== T->getReplacementType().getAsOpaquePtr())
return QualType(T, 0);
return Ctx.getSubstTemplateTypeParmType(T->getReplacedParameter(),
replacementType);
}
// FIXME: Non-trivial to implement, but important for C++
SUGARED_TYPE_CLASS(TemplateSpecialization)
QualType VisitAutoType(const AutoType *T) {
if (!T->isDeduced())
return QualType(T, 0);
QualType deducedType = recurse(T->getDeducedType());
if (deducedType.isNull())
return {};
if (deducedType.getAsOpaquePtr()
== T->getDeducedType().getAsOpaquePtr())
return QualType(T, 0);
return Ctx.getAutoType(deducedType, T->getKeyword(),
T->isDependentType());
}
// FIXME: Non-trivial to implement, but important for C++
SUGARED_TYPE_CLASS(PackExpansion)
QualType VisitObjCObjectType(const ObjCObjectType *T) {
QualType baseType = recurse(T->getBaseType());
if (baseType.isNull())
return {};
// Transform type arguments.
bool typeArgChanged = false;
SmallVector<QualType, 4> typeArgs;
for (auto typeArg : T->getTypeArgsAsWritten()) {
QualType newTypeArg = recurse(typeArg);
if (newTypeArg.isNull())
return {};
if (newTypeArg.getAsOpaquePtr() != typeArg.getAsOpaquePtr())
typeArgChanged = true;
typeArgs.push_back(newTypeArg);
}
if (baseType.getAsOpaquePtr() == T->getBaseType().getAsOpaquePtr() &&
!typeArgChanged)
return QualType(T, 0);
return Ctx.getObjCObjectType(baseType, typeArgs,
llvm::makeArrayRef(T->qual_begin(),
T->getNumProtocols()),
T->isKindOfTypeAsWritten());
}
TRIVIAL_TYPE_CLASS(ObjCInterface)
QualType VisitObjCObjectPointerType(const ObjCObjectPointerType *T) {
QualType pointeeType = recurse(T->getPointeeType());
if (pointeeType.isNull())
return {};
if (pointeeType.getAsOpaquePtr()
== T->getPointeeType().getAsOpaquePtr())
return QualType(T, 0);
return Ctx.getObjCObjectPointerType(pointeeType);
}
QualType VisitAtomicType(const AtomicType *T) {
QualType valueType = recurse(T->getValueType());
if (valueType.isNull())
return {};
if (valueType.getAsOpaquePtr()
== T->getValueType().getAsOpaquePtr())
return QualType(T, 0);
return Ctx.getAtomicType(valueType);
}
#undef TRIVIAL_TYPE_CLASS
#undef SUGARED_TYPE_CLASS
};
struct SubstObjCTypeArgsVisitor
: public SimpleTransformVisitor<SubstObjCTypeArgsVisitor> {
using BaseType = SimpleTransformVisitor<SubstObjCTypeArgsVisitor>;
ArrayRef<QualType> TypeArgs;
ObjCSubstitutionContext SubstContext;
SubstObjCTypeArgsVisitor(ASTContext &ctx, ArrayRef<QualType> typeArgs,
ObjCSubstitutionContext context)
: BaseType(ctx), TypeArgs(typeArgs), SubstContext(context) {}
QualType VisitObjCTypeParamType(const ObjCTypeParamType *OTPTy) {
// Replace an Objective-C type parameter reference with the corresponding
// type argument.
ObjCTypeParamDecl *typeParam = OTPTy->getDecl();
// If we have type arguments, use them.
if (!TypeArgs.empty()) {
QualType argType = TypeArgs[typeParam->getIndex()];
if (OTPTy->qual_empty())
return argType;
// Apply protocol lists if exists.
bool hasError;
SmallVector<ObjCProtocolDecl *, 8> protocolsVec;
protocolsVec.append(OTPTy->qual_begin(), OTPTy->qual_end());
ArrayRef<ObjCProtocolDecl *> protocolsToApply = protocolsVec;
return Ctx.applyObjCProtocolQualifiers(
argType, protocolsToApply, hasError, true/*allowOnPointerType*/);
}
switch (SubstContext) {
case ObjCSubstitutionContext::Ordinary:
case ObjCSubstitutionContext::Parameter:
case ObjCSubstitutionContext::Superclass:
// Substitute the bound.
return typeParam->getUnderlyingType();
case ObjCSubstitutionContext::Result:
case ObjCSubstitutionContext::Property: {
// Substitute the __kindof form of the underlying type.
const auto *objPtr =
typeParam->getUnderlyingType()->castAs<ObjCObjectPointerType>();
// __kindof types, id, and Class don't need an additional
// __kindof.
if (objPtr->isKindOfType() || objPtr->isObjCIdOrClassType())
return typeParam->getUnderlyingType();
// Add __kindof.
const auto *obj = objPtr->getObjectType();
QualType resultTy = Ctx.getObjCObjectType(
obj->getBaseType(), obj->getTypeArgsAsWritten(), obj->getProtocols(),
/*isKindOf=*/true);
// Rebuild object pointer type.
return Ctx.getObjCObjectPointerType(resultTy);
}
}
llvm_unreachable("Unexpected ObjCSubstitutionContext!");
}
QualType VisitFunctionType(const FunctionType *funcType) {
// If we have a function type, update the substitution context
// appropriately.
//Substitute result type.
QualType returnType = funcType->getReturnType().substObjCTypeArgs(
Ctx, TypeArgs, ObjCSubstitutionContext::Result);
if (returnType.isNull())
return {};
// Handle non-prototyped functions, which only substitute into the result
// type.
if (isa<FunctionNoProtoType>(funcType)) {
// If the return type was unchanged, do nothing.
if (returnType.getAsOpaquePtr() ==
funcType->getReturnType().getAsOpaquePtr())
return BaseType::VisitFunctionType(funcType);
// Otherwise, build a new type.
return Ctx.getFunctionNoProtoType(returnType, funcType->getExtInfo());
}
const auto *funcProtoType = cast<FunctionProtoType>(funcType);
// Transform parameter types.
SmallVector<QualType, 4> paramTypes;
bool paramChanged = false;
for (auto paramType : funcProtoType->getParamTypes()) {
QualType newParamType = paramType.substObjCTypeArgs(
Ctx, TypeArgs, ObjCSubstitutionContext::Parameter);
if (newParamType.isNull())
return {};
if (newParamType.getAsOpaquePtr() != paramType.getAsOpaquePtr())
paramChanged = true;
paramTypes.push_back(newParamType);
}
// Transform extended info.
FunctionProtoType::ExtProtoInfo info = funcProtoType->getExtProtoInfo();
bool exceptionChanged = false;
if (info.ExceptionSpec.Type == EST_Dynamic) {
SmallVector<QualType, 4> exceptionTypes;
for (auto exceptionType : info.ExceptionSpec.Exceptions) {
QualType newExceptionType = exceptionType.substObjCTypeArgs(
Ctx, TypeArgs, ObjCSubstitutionContext::Ordinary);
if (newExceptionType.isNull())
return {};
if (newExceptionType.getAsOpaquePtr() != exceptionType.getAsOpaquePtr())
exceptionChanged = true;
exceptionTypes.push_back(newExceptionType);
}
if (exceptionChanged) {
info.ExceptionSpec.Exceptions =
llvm::makeArrayRef(exceptionTypes).copy(Ctx);
}
}
if (returnType.getAsOpaquePtr() ==
funcProtoType->getReturnType().getAsOpaquePtr() &&
!paramChanged && !exceptionChanged)
return BaseType::VisitFunctionType(funcType);
return Ctx.getFunctionType(returnType, paramTypes, info);
}
QualType VisitObjCObjectType(const ObjCObjectType *objcObjectType) {
// Substitute into the type arguments of a specialized Objective-C object
// type.
if (objcObjectType->isSpecializedAsWritten()) {
SmallVector<QualType, 4> newTypeArgs;
bool anyChanged = false;
for (auto typeArg : objcObjectType->getTypeArgsAsWritten()) {
QualType newTypeArg = typeArg.substObjCTypeArgs(
Ctx, TypeArgs, ObjCSubstitutionContext::Ordinary);
if (newTypeArg.isNull())
return {};
if (newTypeArg.getAsOpaquePtr() != typeArg.getAsOpaquePtr()) {
// If we're substituting based on an unspecialized context type,
// produce an unspecialized type.
ArrayRef<ObjCProtocolDecl *> protocols(
objcObjectType->qual_begin(), objcObjectType->getNumProtocols());
if (TypeArgs.empty() &&
SubstContext != ObjCSubstitutionContext::Superclass) {
return Ctx.getObjCObjectType(
objcObjectType->getBaseType(), {}, protocols,
objcObjectType->isKindOfTypeAsWritten());
}
anyChanged = true;
}
newTypeArgs.push_back(newTypeArg);
}
if (anyChanged) {
ArrayRef<ObjCProtocolDecl *> protocols(
objcObjectType->qual_begin(), objcObjectType->getNumProtocols());
return Ctx.getObjCObjectType(objcObjectType->getBaseType(), newTypeArgs,
protocols,
objcObjectType->isKindOfTypeAsWritten());
}
}
return BaseType::VisitObjCObjectType(objcObjectType);
}
QualType VisitAttributedType(const AttributedType *attrType) {
QualType newType = BaseType::VisitAttributedType(attrType);
if (newType.isNull())
return {};
const auto *newAttrType = dyn_cast<AttributedType>(newType.getTypePtr());
if (!newAttrType || newAttrType->getAttrKind() != attr::ObjCKindOf)
return newType;
// Find out if it's an Objective-C object or object pointer type;
QualType newEquivType = newAttrType->getEquivalentType();
const ObjCObjectPointerType *ptrType =
newEquivType->getAs<ObjCObjectPointerType>();
const ObjCObjectType *objType = ptrType
? ptrType->getObjectType()
: newEquivType->getAs<ObjCObjectType>();
if (!objType)
return newType;
// Rebuild the "equivalent" type, which pushes __kindof down into
// the object type.
newEquivType = Ctx.getObjCObjectType(
objType->getBaseType(), objType->getTypeArgsAsWritten(),
objType->getProtocols(),
// There is no need to apply kindof on an unqualified id type.
/*isKindOf=*/objType->isObjCUnqualifiedId() ? false : true);
// If we started with an object pointer type, rebuild it.
if (ptrType)
newEquivType = Ctx.getObjCObjectPointerType(newEquivType);
// Rebuild the attributed type.
return Ctx.getAttributedType(newAttrType->getAttrKind(),
newAttrType->getModifiedType(), newEquivType);
}
};
struct StripObjCKindOfTypeVisitor
: public SimpleTransformVisitor<StripObjCKindOfTypeVisitor> {
using BaseType = SimpleTransformVisitor<StripObjCKindOfTypeVisitor>;
explicit StripObjCKindOfTypeVisitor(ASTContext &ctx) : BaseType(ctx) {}
QualType VisitObjCObjectType(const ObjCObjectType *objType) {
if (!objType->isKindOfType())
return BaseType::VisitObjCObjectType(objType);
QualType baseType = objType->getBaseType().stripObjCKindOfType(Ctx);
return Ctx.getObjCObjectType(baseType, objType->getTypeArgsAsWritten(),
objType->getProtocols(),
/*isKindOf=*/false);
}
};
} // namespace
/// Substitute the given type arguments for Objective-C type
/// parameters within the given type, recursively.
QualType QualType::substObjCTypeArgs(ASTContext &ctx,
ArrayRef<QualType> typeArgs,
ObjCSubstitutionContext context) const {
SubstObjCTypeArgsVisitor visitor(ctx, typeArgs, context);
return visitor.recurse(*this);
}
QualType QualType::substObjCMemberType(QualType objectType,
const DeclContext *dc,
ObjCSubstitutionContext context) const {
if (auto subs = objectType->getObjCSubstitutions(dc))
return substObjCTypeArgs(dc->getParentASTContext(), *subs, context);
return *this;
}
QualType QualType::stripObjCKindOfType(const ASTContext &constCtx) const {
// FIXME: Because ASTContext::getAttributedType() is non-const.
auto &ctx = const_cast<ASTContext &>(constCtx);
StripObjCKindOfTypeVisitor visitor(ctx);
return visitor.recurse(*this);
}
QualType QualType::getAtomicUnqualifiedType() const {
if (const auto AT = getTypePtr()->getAs<AtomicType>())
return AT->getValueType().getUnqualifiedType();
return getUnqualifiedType();
}
Optional<ArrayRef<QualType>> Type::getObjCSubstitutions(
const DeclContext *dc) const {
// Look through method scopes.
if (const auto method = dyn_cast<ObjCMethodDecl>(dc))
dc = method->getDeclContext();
// Find the class or category in which the type we're substituting
// was declared.
const auto *dcClassDecl = dyn_cast<ObjCInterfaceDecl>(dc);
const ObjCCategoryDecl *dcCategoryDecl = nullptr;
ObjCTypeParamList *dcTypeParams = nullptr;
if (dcClassDecl) {
// If the class does not have any type parameters, there's no
// substitution to do.
dcTypeParams = dcClassDecl->getTypeParamList();
if (!dcTypeParams)
return None;
} else {
// If we are in neither a class nor a category, there's no
// substitution to perform.
dcCategoryDecl = dyn_cast<ObjCCategoryDecl>(dc);
if (!dcCategoryDecl)
return None;
// If the category does not have any type parameters, there's no
// substitution to do.
dcTypeParams = dcCategoryDecl->getTypeParamList();
if (!dcTypeParams)
return None;
dcClassDecl = dcCategoryDecl->getClassInterface();
if (!dcClassDecl)
return None;
}
assert(dcTypeParams && "No substitutions to perform");
assert(dcClassDecl && "No class context");
// Find the underlying object type.
const ObjCObjectType *objectType;
if (const auto *objectPointerType = getAs<ObjCObjectPointerType>()) {
objectType = objectPointerType->getObjectType();
} else if (getAs<BlockPointerType>()) {
ASTContext &ctx = dc->getParentASTContext();
objectType = ctx.getObjCObjectType(ctx.ObjCBuiltinIdTy, {}, {})
->castAs<ObjCObjectType>();
} else {
objectType = getAs<ObjCObjectType>();
}
/// Extract the class from the receiver object type.
ObjCInterfaceDecl *curClassDecl = objectType ? objectType->getInterface()
: nullptr;
if (!curClassDecl) {
// If we don't have a context type (e.g., this is "id" or some
// variant thereof), substitute the bounds.
return llvm::ArrayRef<QualType>();
}
// Follow the superclass chain until we've mapped the receiver type
// to the same class as the context.
while (curClassDecl != dcClassDecl) {
// Map to the superclass type.
QualType superType = objectType->getSuperClassType();
if (superType.isNull()) {
objectType = nullptr;
break;
}
objectType = superType->castAs<ObjCObjectType>();
curClassDecl = objectType->getInterface();
}
// If we don't have a receiver type, or the receiver type does not
// have type arguments, substitute in the defaults.
if (!objectType || objectType->isUnspecialized()) {
return llvm::ArrayRef<QualType>();
}
// The receiver type has the type arguments we want.
return objectType->getTypeArgs();
}
bool Type::acceptsObjCTypeParams() const {
if (auto *IfaceT = getAsObjCInterfaceType()) {
if (auto *ID = IfaceT->getInterface()) {
if (ID->getTypeParamList())
return true;
}
}
return false;
}
void ObjCObjectType::computeSuperClassTypeSlow() const {
// Retrieve the class declaration for this type. If there isn't one
// (e.g., this is some variant of "id" or "Class"), then there is no
// superclass type.
ObjCInterfaceDecl *classDecl = getInterface();
if (!classDecl) {
CachedSuperClassType.setInt(true);
return;
}
// Extract the superclass type.
const ObjCObjectType *superClassObjTy = classDecl->getSuperClassType();
if (!superClassObjTy) {
CachedSuperClassType.setInt(true);
return;
}
ObjCInterfaceDecl *superClassDecl = superClassObjTy->getInterface();
if (!superClassDecl) {
CachedSuperClassType.setInt(true);
return;
}
// If the superclass doesn't have type parameters, then there is no
// substitution to perform.
QualType superClassType(superClassObjTy, 0);
ObjCTypeParamList *superClassTypeParams = superClassDecl->getTypeParamList();
if (!superClassTypeParams) {
CachedSuperClassType.setPointerAndInt(
superClassType->castAs<ObjCObjectType>(), true);
return;
}
// If the superclass reference is unspecialized, return it.
if (superClassObjTy->isUnspecialized()) {
CachedSuperClassType.setPointerAndInt(superClassObjTy, true);
return;
}
// If the subclass is not parameterized, there aren't any type
// parameters in the superclass reference to substitute.
ObjCTypeParamList *typeParams = classDecl->getTypeParamList();
if (!typeParams) {
CachedSuperClassType.setPointerAndInt(
superClassType->castAs<ObjCObjectType>(), true);
return;
}
// If the subclass type isn't specialized, return the unspecialized
// superclass.
if (isUnspecialized()) {
QualType unspecializedSuper
= classDecl->getASTContext().getObjCInterfaceType(
superClassObjTy->getInterface());
CachedSuperClassType.setPointerAndInt(
unspecializedSuper->castAs<ObjCObjectType>(),
true);
return;
}
// Substitute the provided type arguments into the superclass type.
ArrayRef<QualType> typeArgs = getTypeArgs();
assert(typeArgs.size() == typeParams->size());
CachedSuperClassType.setPointerAndInt(
superClassType.substObjCTypeArgs(classDecl->getASTContext(), typeArgs,
ObjCSubstitutionContext::Superclass)
->castAs<ObjCObjectType>(),
true);
}
const ObjCInterfaceType *ObjCObjectPointerType::getInterfaceType() const {
if (auto interfaceDecl = getObjectType()->getInterface()) {
return interfaceDecl->getASTContext().getObjCInterfaceType(interfaceDecl)
->castAs<ObjCInterfaceType>();
}
return nullptr;
}
QualType ObjCObjectPointerType::getSuperClassType() const {
QualType superObjectType = getObjectType()->getSuperClassType();
if (superObjectType.isNull())
return superObjectType;
ASTContext &ctx = getInterfaceDecl()->getASTContext();
return ctx.getObjCObjectPointerType(superObjectType);
}
const ObjCObjectType *Type::getAsObjCQualifiedInterfaceType() const {
// There is no sugar for ObjCObjectType's, just return the canonical
// type pointer if it is the right class. There is no typedef information to
// return and these cannot be Address-space qualified.
if (const auto *T = getAs<ObjCObjectType>())
if (T->getNumProtocols() && T->getInterface())
return T;
return nullptr;
}
bool Type::isObjCQualifiedInterfaceType() const {
return getAsObjCQualifiedInterfaceType() != nullptr;
}
const ObjCObjectPointerType *Type::getAsObjCQualifiedIdType() const {
// There is no sugar for ObjCQualifiedIdType's, just return the canonical
// type pointer if it is the right class.
if (const auto *OPT = getAs<ObjCObjectPointerType>()) {
if (OPT->isObjCQualifiedIdType())
return OPT;
}
return nullptr;
}
const ObjCObjectPointerType *Type::getAsObjCQualifiedClassType() const {
// There is no sugar for ObjCQualifiedClassType's, just return the canonical
// type pointer if it is the right class.
if (const auto *OPT = getAs<ObjCObjectPointerType>()) {
if (OPT->isObjCQualifiedClassType())
return OPT;
}
return nullptr;
}
const ObjCObjectType *Type::getAsObjCInterfaceType() const {
if (const auto *OT = getAs<ObjCObjectType>()) {
if (OT->getInterface())
return OT;
}
return nullptr;
}
const ObjCObjectPointerType *Type::getAsObjCInterfacePointerType() const {
if (const auto *OPT = getAs<ObjCObjectPointerType>()) {
if (OPT->getInterfaceType())
return OPT;
}
return nullptr;
}
const CXXRecordDecl *Type::getPointeeCXXRecordDecl() const {
QualType PointeeType;
if (const auto *PT = getAs<PointerType>())
PointeeType = PT->getPointeeType();
else if (const auto *RT = getAs<ReferenceType>())
PointeeType = RT->getPointeeType();
else
return nullptr;
if (const auto *RT = PointeeType->getAs<RecordType>())
return dyn_cast<CXXRecordDecl>(RT->getDecl());
return nullptr;
}
CXXRecordDecl *Type::getAsCXXRecordDecl() const {
return dyn_cast_or_null<CXXRecordDecl>(getAsTagDecl());
}
RecordDecl *Type::getAsRecordDecl() const {
return dyn_cast_or_null<RecordDecl>(getAsTagDecl());
}
TagDecl *Type::getAsTagDecl() const {
if (const auto *TT = getAs<TagType>())
return TT->getDecl();
if (const auto *Injected = getAs<InjectedClassNameType>())
return Injected->getDecl();
return nullptr;
}
bool Type::hasAttr(attr::Kind AK) const {
const Type *Cur = this;
while (const auto *AT = Cur->getAs<AttributedType>()) {
if (AT->getAttrKind() == AK)
return true;
Cur = AT->getEquivalentType().getTypePtr();
}
return false;
}
namespace {
class GetContainedDeducedTypeVisitor :
public TypeVisitor<GetContainedDeducedTypeVisitor, Type*> {
bool Syntactic;
public:
GetContainedDeducedTypeVisitor(bool Syntactic = false)
: Syntactic(Syntactic) {}
using TypeVisitor<GetContainedDeducedTypeVisitor, Type*>::Visit;
Type *Visit(QualType T) {
if (T.isNull())
return nullptr;
return Visit(T.getTypePtr());
}
// The deduced type itself.
Type *VisitDeducedType(const DeducedType *AT) {
return const_cast<DeducedType*>(AT);
}
// Only these types can contain the desired 'auto' type.
Type *VisitElaboratedType(const ElaboratedType *T) {
return Visit(T->getNamedType());
}
Type *VisitPointerType(const PointerType *T) {
return Visit(T->getPointeeType());
}
Type *VisitBlockPointerType(const BlockPointerType *T) {
return Visit(T->getPointeeType());
}
Type *VisitReferenceType(const ReferenceType *T) {
return Visit(T->getPointeeTypeAsWritten());
}
Type *VisitMemberPointerType(const MemberPointerType *T) {
return Visit(T->getPointeeType());
}
Type *VisitArrayType(const ArrayType *T) {
return Visit(T->getElementType());
}
Type *VisitDependentSizedExtVectorType(
const DependentSizedExtVectorType *T) {
return Visit(T->getElementType());
}
Type *VisitVectorType(const VectorType *T) {
return Visit(T->getElementType());
}
Type *VisitFunctionProtoType(const FunctionProtoType *T) {
if (Syntactic && T->hasTrailingReturn())
return const_cast<FunctionProtoType*>(T);
return VisitFunctionType(T);
}
Type *VisitFunctionType(const FunctionType *T) {
return Visit(T->getReturnType());
}
Type *VisitParenType(const ParenType *T) {
return Visit(T->getInnerType());
}
Type *VisitAttributedType(const AttributedType *T) {
return Visit(T->getModifiedType());
}
Type *VisitMacroQualifiedType(const MacroQualifiedType *T) {
return Visit(T->getUnderlyingType());
}
Type *VisitAdjustedType(const AdjustedType *T) {
return Visit(T->getOriginalType());
}
Type *VisitPackExpansionType(const PackExpansionType *T) {
return Visit(T->getPattern());
}
};
} // namespace
DeducedType *Type::getContainedDeducedType() const {
return cast_or_null<DeducedType>(
GetContainedDeducedTypeVisitor().Visit(this));
}
bool Type::hasAutoForTrailingReturnType() const {
return dyn_cast_or_null<FunctionType>(
GetContainedDeducedTypeVisitor(true).Visit(this));
}
bool Type::hasIntegerRepresentation() const {
if (const auto *VT = dyn_cast<VectorType>(CanonicalType))
return VT->getElementType()->isIntegerType();
else
return isIntegerType();
}
/// Determine whether this type is an integral type.
///
/// This routine determines whether the given type is an integral type per
/// C++ [basic.fundamental]p7. Although the C standard does not define the
/// term "integral type", it has a similar term "integer type", and in C++
/// the two terms are equivalent. However, C's "integer type" includes
/// enumeration types, while C++'s "integer type" does not. The \c ASTContext
/// parameter is used to determine whether we should be following the C or
/// C++ rules when determining whether this type is an integral/integer type.
///
/// For cases where C permits "an integer type" and C++ permits "an integral
/// type", use this routine.
///
/// For cases where C permits "an integer type" and C++ permits "an integral
/// or enumeration type", use \c isIntegralOrEnumerationType() instead.
///
/// \param Ctx The context in which this type occurs.
///
/// \returns true if the type is considered an integral type, false otherwise.
bool Type::isIntegralType(const ASTContext &Ctx) const {
if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType))
return BT->getKind() >= BuiltinType::Bool &&
BT->getKind() <= BuiltinType::Int128;
// Complete enum types are integral in C.
if (!Ctx.getLangOpts().CPlusPlus)
if (const auto *ET = dyn_cast<EnumType>(CanonicalType))
return ET->getDecl()->isComplete();
return false;
}
bool Type::isIntegralOrUnscopedEnumerationType() const {
if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType))
return BT->getKind() >= BuiltinType::Bool &&
BT->getKind() <= BuiltinType::Int128;
// Check for a complete enum type; incomplete enum types are not properly an
// enumeration type in the sense required here.
// C++0x: However, if the underlying type of the enum is fixed, it is
// considered complete.
if (const auto *ET = dyn_cast<EnumType>(CanonicalType))
return ET->getDecl()->isComplete() && !ET->getDecl()->isScoped();
return false;
}
bool Type::isCharType() const {
if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType))
return BT->getKind() == BuiltinType::Char_U ||
BT->getKind() == BuiltinType::UChar ||
BT->getKind() == BuiltinType::Char_S ||
BT->getKind() == BuiltinType::SChar;
return false;
}
bool Type::isWideCharType() const {
if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType))
return BT->getKind() == BuiltinType::WChar_S ||
BT->getKind() == BuiltinType::WChar_U;
return false;
}
bool Type::isChar8Type() const {
if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType))
return BT->getKind() == BuiltinType::Char8;
return false;
}
bool Type::isChar16Type() const {
if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType))
return BT->getKind() == BuiltinType::Char16;
return false;
}
bool Type::isChar32Type() const {
if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType))
return BT->getKind() == BuiltinType::Char32;
return false;
}
/// Determine whether this type is any of the built-in character
/// types.
bool Type::isAnyCharacterType() const {
const auto *BT = dyn_cast<BuiltinType>(CanonicalType);
if (!BT) return false;
switch (BT->getKind()) {
default: return false;
case BuiltinType::Char_U:
case BuiltinType::UChar:
case BuiltinType::WChar_U:
case BuiltinType::Char8:
case BuiltinType::Char16:
case BuiltinType::Char32:
case BuiltinType::Char_S:
case BuiltinType::SChar:
case BuiltinType::WChar_S:
return true;
}
}
/// isSignedIntegerType - Return true if this is an integer type that is
/// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..],
/// an enum decl which has a signed representation
bool Type::isSignedIntegerType() const {
if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) {
return BT->getKind() >= BuiltinType::Char_S &&
BT->getKind() <= BuiltinType::Int128;
}
if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) {
// Incomplete enum types are not treated as integer types.
// FIXME: In C++, enum types are never integer types.
if (ET->getDecl()->isComplete() && !ET->getDecl()->isScoped())
return ET->getDecl()->getIntegerType()->isSignedIntegerType();
}
return false;
}
bool Type::isSignedIntegerOrEnumerationType() const {
if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) {
return BT->getKind() >= BuiltinType::Char_S &&
BT->getKind() <= BuiltinType::Int128;
}
if (const auto *ET = dyn_cast<EnumType>(CanonicalType)) {
if (ET->getDecl()->isComplete())
return ET->getDecl()->getIntegerType()->isSignedIntegerType();
}
return false;
}
bool Type::hasSignedIntegerRepresentation() const {
if (const auto *VT = dyn_cast<VectorType>(CanonicalType))
return VT->getElementType()->isSignedIntegerOrEnumerationType();
else
return isSignedIntegerOrEnumerationType();
}
/// isUnsignedIntegerType - Return true if this is an integer type that is
/// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum
/// decl which has an unsigned representation
bool Type::isUnsignedIntegerType() const {
if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) {
return BT->getKind() >= BuiltinType::Bool &&
BT->getKind() <= BuiltinType::UInt128;
}
if (const auto *ET = dyn_cast<EnumType>(CanonicalType)) {
// Incomplete enum types are not treated as integer types.
// FIXME: In C++, enum types are never integer types.
if (ET->getDecl()->isComplete() && !ET->getDecl()->isScoped())
return ET->getDecl()->getIntegerType()->isUnsignedIntegerType();
}
return false;
}
bool Type::isUnsignedIntegerOrEnumerationType() const {
if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) {
return BT->getKind() >= BuiltinType::Bool &&
BT->getKind() <= BuiltinType::UInt128;
}
if (const auto *ET = dyn_cast<EnumType>(CanonicalType)) {
if (ET->getDecl()->isComplete())
return ET->getDecl()->getIntegerType()->isUnsignedIntegerType();
}
return false;
}
bool Type::hasUnsignedIntegerRepresentation() const {
if (const auto *VT = dyn_cast<VectorType>(CanonicalType))
return VT->getElementType()->isUnsignedIntegerOrEnumerationType();
else
return isUnsignedIntegerOrEnumerationType();
}
bool Type::isFloatingType() const {
if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType))
return BT->getKind() >= BuiltinType::Half &&
BT->getKind() <= BuiltinType::Float128;
if (const auto *CT = dyn_cast<ComplexType>(CanonicalType))
return CT->getElementType()->isFloatingType();
return false;
}
bool Type::hasFloatingRepresentation() const {
if (const auto *VT = dyn_cast<VectorType>(CanonicalType))
return VT->getElementType()->isFloatingType();
else
return isFloatingType();
}
bool Type::isRealFloatingType() const {
if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType))
return BT->isFloatingPoint();
return false;
}
bool Type::isRealType() const {
if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType))
return BT->getKind() >= BuiltinType::Bool &&
BT->getKind() <= BuiltinType::Float128;
if (const auto *ET = dyn_cast<EnumType>(CanonicalType))
return ET->getDecl()->isComplete() && !ET->getDecl()->isScoped();
return false;
}
bool Type::isArithmeticType() const {
if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType))
return BT->getKind() >= BuiltinType::Bool &&
BT->getKind() <= BuiltinType::Float128;
if (const auto *ET = dyn_cast<EnumType>(CanonicalType))
// GCC allows forward declaration of enum types (forbid by C99 6.7.2.3p2).
// If a body isn't seen by the time we get here, return false.
//
// C++0x: Enumerations are not arithmetic types. For now, just return
// false for scoped enumerations since that will disable any
// unwanted implicit conversions.
return !ET->getDecl()->isScoped() && ET->getDecl()->isComplete();
return isa<ComplexType>(CanonicalType);
}
Type::ScalarTypeKind Type::getScalarTypeKind() const {
assert(isScalarType());
const Type *T = CanonicalType.getTypePtr();
if (const auto *BT = dyn_cast<BuiltinType>(T)) {
if (BT->getKind() == BuiltinType::Bool) return STK_Bool;
if (BT->getKind() == BuiltinType::NullPtr) return STK_CPointer;
if (BT->isInteger()) return STK_Integral;
if (BT->isFloatingPoint()) return STK_Floating;
if (BT->isFixedPointType()) return STK_FixedPoint;
llvm_unreachable("unknown scalar builtin type");
} else if (isa<PointerType>(T)) {
return STK_CPointer;
} else if (isa<BlockPointerType>(T)) {
return STK_BlockPointer;
} else if (isa<ObjCObjectPointerType>(T)) {
return STK_ObjCObjectPointer;
} else if (isa<MemberPointerType>(T)) {
return STK_MemberPointer;
} else if (isa<EnumType>(T)) {
assert(cast<EnumType>(T)->getDecl()->isComplete());
return STK_Integral;
} else if (const auto *CT = dyn_cast<ComplexType>(T)) {
if (CT->getElementType()->isRealFloatingType())
return STK_FloatingComplex;
return STK_IntegralComplex;
}
llvm_unreachable("unknown scalar type");
}
/// Determines whether the type is a C++ aggregate type or C
/// aggregate or union type.
///
/// An aggregate type is an array or a class type (struct, union, or
/// class) that has no user-declared constructors, no private or
/// protected non-static data members, no base classes, and no virtual
/// functions (C++ [dcl.init.aggr]p1). The notion of an aggregate type
/// subsumes the notion of C aggregates (C99 6.2.5p21) because it also
/// includes union types.
bool Type::isAggregateType() const {
if (const auto *Record = dyn_cast<RecordType>(CanonicalType)) {
if (const auto *ClassDecl = dyn_cast<CXXRecordDecl>(Record->getDecl()))
return ClassDecl->isAggregate();
return true;
}
return isa<ArrayType>(CanonicalType);
}
/// isConstantSizeType - Return true if this is not a variable sized type,
/// according to the rules of C99 6.7.5p3. It is not legal to call this on
/// incomplete types or dependent types.
bool Type::isConstantSizeType() const {
assert(!isIncompleteType() && "This doesn't make sense for incomplete types");
assert(!isDependentType() && "This doesn't make sense for dependent types");
// The VAT must have a size, as it is known to be complete.
return !isa<VariableArrayType>(CanonicalType);
}
/// isIncompleteType - Return true if this is an incomplete type (C99 6.2.5p1)
/// - a type that can describe objects, but which lacks information needed to
/// determine its size.
bool Type::isIncompleteType(NamedDecl **Def) const {
if (Def)
*Def = nullptr;
switch (CanonicalType->getTypeClass()) {
default: return false;
case Builtin:
// Void is the only incomplete builtin type. Per C99 6.2.5p19, it can never
// be completed.
return isVoidType();
case Enum: {
EnumDecl *EnumD = cast<EnumType>(CanonicalType)->getDecl();
if (Def)
*Def = EnumD;
return !EnumD->isComplete();
}
case Record: {
// A tagged type (struct/union/enum/class) is incomplete if the decl is a
// forward declaration, but not a full definition (C99 6.2.5p22).
RecordDecl *Rec = cast<RecordType>(CanonicalType)->getDecl();
if (Def)
*Def = Rec;
return !Rec->isCompleteDefinition();
}
case ConstantArray:
// An array is incomplete if its element type is incomplete
// (C++ [dcl.array]p1).
// We don't handle variable arrays (they're not allowed in C++) or
// dependent-sized arrays (dependent types are never treated as incomplete).
return cast<ArrayType>(CanonicalType)->getElementType()
->isIncompleteType(Def);
case IncompleteArray:
// An array of unknown size is an incomplete type (C99 6.2.5p22).
return true;
case MemberPointer: {
// Member pointers in the MS ABI have special behavior in
// RequireCompleteType: they attach a MSInheritanceAttr to the CXXRecordDecl
// to indicate which inheritance model to use.
auto *MPTy = cast<MemberPointerType>(CanonicalType);
const Type *ClassTy = MPTy->getClass();
// Member pointers with dependent class types don't get special treatment.
if (ClassTy->isDependentType())
return false;
const CXXRecordDecl *RD = ClassTy->getAsCXXRecordDecl();
ASTContext &Context = RD->getASTContext();
// Member pointers not in the MS ABI don't get special treatment.
if (!Context.getTargetInfo().getCXXABI().isMicrosoft())
return false;
// The inheritance attribute might only be present on the most recent
// CXXRecordDecl, use that one.
RD = RD->getMostRecentNonInjectedDecl();
// Nothing interesting to do if the inheritance attribute is already set.
if (RD->hasAttr<MSInheritanceAttr>())
return false;
return true;
}
case ObjCObject:
return cast<ObjCObjectType>(CanonicalType)->getBaseType()
->isIncompleteType(Def);
case ObjCInterface: {
// ObjC interfaces are incomplete if they are @class, not @interface.
ObjCInterfaceDecl *Interface
= cast<ObjCInterfaceType>(CanonicalType)->getDecl();
if (Def)
*Def = Interface;
return !Interface->hasDefinition();
}
}
}
bool QualType::isPODType(const ASTContext &Context) const {
// C++11 has a more relaxed definition of POD.
if (Context.getLangOpts().CPlusPlus11)
return isCXX11PODType(Context);
return isCXX98PODType(Context);
}
bool QualType::isCXX98PODType(const ASTContext &Context) const {
// The compiler shouldn't query this for incomplete types, but the user might.
// We return false for that case. Except for incomplete arrays of PODs, which
// are PODs according to the standard.
if (isNull())
return false;
if ((*this)->isIncompleteArrayType())
return Context.getBaseElementType(*this).isCXX98PODType(Context);
if ((*this)->isIncompleteType())
return false;
if (hasNonTrivialObjCLifetime())
return false;
QualType CanonicalType = getTypePtr()->CanonicalType;
switch (CanonicalType->getTypeClass()) {
// Everything not explicitly mentioned is not POD.
default: return false;
case Type::VariableArray:
case Type::ConstantArray:
// IncompleteArray is handled above.
return Context.getBaseElementType(*this).isCXX98PODType(Context);
case Type::ObjCObjectPointer:
case Type::BlockPointer:
case Type::Builtin:
case Type::Complex:
case Type::Pointer:
case Type::MemberPointer:
case Type::Vector:
case Type::ExtVector:
return true;
case Type::Enum:
return true;
case Type::Record:
if (const auto *ClassDecl =
dyn_cast<CXXRecordDecl>(cast<RecordType>(CanonicalType)->getDecl()))
return ClassDecl->isPOD();
// C struct/union is POD.
return true;
}
}
bool QualType::isTrivialType(const ASTContext &Context) const {
// The compiler shouldn't query this for incomplete types, but the user might.
// We return false for that case. Except for incomplete arrays of PODs, which
// are PODs according to the standard.
if (isNull())
return false;
if ((*this)->isArrayType())
return Context.getBaseElementType(*this).isTrivialType(Context);
// Return false for incomplete types after skipping any incomplete array
// types which are expressly allowed by the standard and thus our API.
if ((*this)->isIncompleteType())
return false;
if (hasNonTrivialObjCLifetime())
return false;
QualType CanonicalType = getTypePtr()->CanonicalType;
if (CanonicalType->isDependentType())
return false;
// C++0x [basic.types]p9:
// Scalar types, trivial class types, arrays of such types, and
// cv-qualified versions of these types are collectively called trivial
// types.
// As an extension, Clang treats vector types as Scalar types.
if (CanonicalType->isScalarType() || CanonicalType->isVectorType())
return true;
if (const auto *RT = CanonicalType->getAs<RecordType>()) {
if (const auto *ClassDecl = dyn_cast<CXXRecordDecl>(RT->getDecl())) {
// C++11 [class]p6:
// A trivial class is a class that has a default constructor,
// has no non-trivial default constructors, and is trivially
// copyable.
return ClassDecl->hasDefaultConstructor() &&
!ClassDecl->hasNonTrivialDefaultConstructor() &&
ClassDecl->isTriviallyCopyable();
}
return true;
}
// No other types can match.
return false;
}
bool QualType::isTriviallyCopyableType(const ASTContext &Context) const {
if ((*this)->isArrayType())
return Context.getBaseElementType(*this).isTriviallyCopyableType(Context);
if (hasNonTrivialObjCLifetime())
return false;
// C++11 [basic.types]p9 - See Core 2094
// Scalar types, trivially copyable class types, arrays of such types, and
// cv-qualified versions of these types are collectively
// called trivially copyable types.
QualType CanonicalType = getCanonicalType();
if (CanonicalType->isDependentType())
return false;
// Return false for incomplete types after skipping any incomplete array types
// which are expressly allowed by the standard and thus our API.
if (CanonicalType->isIncompleteType())
return false;
// As an extension, Clang treats vector types as Scalar types.
if (CanonicalType->isScalarType() || CanonicalType->isVectorType())
return true;
if (const auto *RT = CanonicalType->getAs<RecordType>()) {
if (const auto *ClassDecl = dyn_cast<CXXRecordDecl>(RT->getDecl())) {
if (!ClassDecl->isTriviallyCopyable()) return false;
}
return true;
}
// No other types can match.
return false;
}
bool QualType::isNonWeakInMRRWithObjCWeak(const ASTContext &Context) const {
return !Context.getLangOpts().ObjCAutoRefCount &&
Context.getLangOpts().ObjCWeak &&
getObjCLifetime() != Qualifiers::OCL_Weak;
}
bool QualType::hasNonTrivialToPrimitiveDefaultInitializeCUnion(const RecordDecl *RD) {
return RD->hasNonTrivialToPrimitiveDefaultInitializeCUnion();
}
bool QualType::hasNonTrivialToPrimitiveDestructCUnion(const RecordDecl *RD) {
return RD->hasNonTrivialToPrimitiveDestructCUnion();
}
bool QualType::hasNonTrivialToPrimitiveCopyCUnion(const RecordDecl *RD) {
return RD->hasNonTrivialToPrimitiveCopyCUnion();
}
QualType::PrimitiveDefaultInitializeKind
QualType::isNonTrivialToPrimitiveDefaultInitialize() const {
if (const auto *RT =
getTypePtr()->getBaseElementTypeUnsafe()->getAs<RecordType>())
if (RT->getDecl()->isNonTrivialToPrimitiveDefaultInitialize())
return PDIK_Struct;
switch (getQualifiers().getObjCLifetime()) {
case Qualifiers::OCL_Strong:
return PDIK_ARCStrong;
case Qualifiers::OCL_Weak:
return PDIK_ARCWeak;
default:
return PDIK_Trivial;
}
}
QualType::PrimitiveCopyKind QualType::isNonTrivialToPrimitiveCopy() const {
if (const auto *RT =
getTypePtr()->getBaseElementTypeUnsafe()->getAs<RecordType>())
if (RT->getDecl()->isNonTrivialToPrimitiveCopy())
return PCK_Struct;
Qualifiers Qs = getQualifiers();
switch (Qs.getObjCLifetime()) {
case Qualifiers::OCL_Strong:
return PCK_ARCStrong;
case Qualifiers::OCL_Weak:
return PCK_ARCWeak;
default:
return Qs.hasVolatile() ? PCK_VolatileTrivial : PCK_Trivial;
}
}
QualType::PrimitiveCopyKind
QualType::isNonTrivialToPrimitiveDestructiveMove() const {
return isNonTrivialToPrimitiveCopy();
}
bool Type::isLiteralType(const ASTContext &Ctx) const {
if (isDependentType())
return false;
// C++1y [basic.types]p10:
// A type is a literal type if it is:
// -- cv void; or
if (Ctx.getLangOpts().CPlusPlus14 && isVoidType())
return true;
// C++11 [basic.types]p10:
// A type is a literal type if it is:
// [...]
// -- an array of literal type other than an array of runtime bound; or
if (isVariableArrayType())
return false;
const Type *BaseTy = getBaseElementTypeUnsafe();
assert(BaseTy && "NULL element type");
// Return false for incomplete types after skipping any incomplete array
// types; those are expressly allowed by the standard and thus our API.
if (BaseTy->isIncompleteType())
return false;
// C++11 [basic.types]p10:
// A type is a literal type if it is:
// -- a scalar type; or
// As an extension, Clang treats vector types and complex types as
// literal types.
if (BaseTy->isScalarType() || BaseTy->isVectorType() ||
BaseTy->isAnyComplexType())
return true;
// -- a reference type; or
if (BaseTy->isReferenceType())
return true;
// -- a class type that has all of the following properties:
if (const auto *RT = BaseTy->getAs<RecordType>()) {
// -- a trivial destructor,
// -- every constructor call and full-expression in the
// brace-or-equal-initializers for non-static data members (if any)
// is a constant expression,
// -- it is an aggregate type or has at least one constexpr
// constructor or constructor template that is not a copy or move
// constructor, and
// -- all non-static data members and base classes of literal types
//
// We resolve DR1361 by ignoring the second bullet.
if (const auto *ClassDecl = dyn_cast<CXXRecordDecl>(RT->getDecl()))
return ClassDecl->isLiteral();
return true;
}
// We treat _Atomic T as a literal type if T is a literal type.
if (const auto *AT = BaseTy->getAs<AtomicType>())
return AT->getValueType()->isLiteralType(Ctx);
// If this type hasn't been deduced yet, then conservatively assume that
// it'll work out to be a literal type.
if (isa<AutoType>(BaseTy->getCanonicalTypeInternal()))
return true;
return false;
}
bool Type::isStandardLayoutType() const {
if (isDependentType())
return false;
// C++0x [basic.types]p9:
// Scalar types, standard-layout class types, arrays of such types, and
// cv-qualified versions of these types are collectively called
// standard-layout types.
const Type *BaseTy = getBaseElementTypeUnsafe();
assert(BaseTy && "NULL element type");
// Return false for incomplete types after skipping any incomplete array
// types which are expressly allowed by the standard and thus our API.
if (BaseTy->isIncompleteType())
return false;
// As an extension, Clang treats vector types as Scalar types.
if (BaseTy->isScalarType() || BaseTy->isVectorType()) return true;
if (const auto *RT = BaseTy->getAs<RecordType>()) {
if (const auto *ClassDecl = dyn_cast<CXXRecordDecl>(RT->getDecl()))
if (!ClassDecl->isStandardLayout())
return false;
// Default to 'true' for non-C++ class types.
// FIXME: This is a bit dubious, but plain C structs should trivially meet
// all the requirements of standard layout classes.
return true;
}
// No other types can match.
return false;
}
// This is effectively the intersection of isTrivialType and
// isStandardLayoutType. We implement it directly to avoid redundant
// conversions from a type to a CXXRecordDecl.
bool QualType::isCXX11PODType(const ASTContext &Context) const {
const Type *ty = getTypePtr();
if (ty->isDependentType())
return false;
if (hasNonTrivialObjCLifetime())
return false;
// C++11 [basic.types]p9:
// Scalar types, POD classes, arrays of such types, and cv-qualified
// versions of these types are collectively called trivial types.
const Type *BaseTy = ty->getBaseElementTypeUnsafe();
assert(BaseTy && "NULL element type");
// Return false for incomplete types after skipping any incomplete array
// types which are expressly allowed by the standard and thus our API.
if (BaseTy->isIncompleteType())
return false;
// As an extension, Clang treats vector types as Scalar types.
if (BaseTy->isScalarType() || BaseTy->isVectorType()) return true;
if (const auto *RT = BaseTy->getAs<RecordType>()) {
if (const auto *ClassDecl = dyn_cast<CXXRecordDecl>(RT->getDecl())) {
// C++11 [class]p10:
// A POD struct is a non-union class that is both a trivial class [...]
if (!ClassDecl->isTrivial()) return false;
// C++11 [class]p10:
// A POD struct is a non-union class that is both a trivial class and
// a standard-layout class [...]
if (!ClassDecl->isStandardLayout()) return false;
// C++11 [class]p10:
// A POD struct is a non-union class that is both a trivial class and
// a standard-layout class, and has no non-static data members of type
// non-POD struct, non-POD union (or array of such types). [...]
//
// We don't directly query the recursive aspect as the requirements for
// both standard-layout classes and trivial classes apply recursively
// already.
}
return true;
}
// No other types can match.
return false;
}
bool Type::isNothrowT() const {
if (const auto *RD = getAsCXXRecordDecl()) {
IdentifierInfo *II = RD->getIdentifier();
if (II && II->isStr("nothrow_t") && RD->isInStdNamespace())
return true;
}
return false;
}
bool Type::isAlignValT() const {
if (const auto *ET = getAs<EnumType>()) {
IdentifierInfo *II = ET->getDecl()->getIdentifier();
if (II && II->isStr("align_val_t") && ET->getDecl()->isInStdNamespace())
return true;
}
return false;
}
bool Type::isStdByteType() const {
if (const auto *ET = getAs<EnumType>()) {
IdentifierInfo *II = ET->getDecl()->getIdentifier();
if (II && II->isStr("byte") && ET->getDecl()->isInStdNamespace())
return true;
}
return false;
}
bool Type::isPromotableIntegerType() const {
if (const auto *BT = getAs<BuiltinType>())
switch (BT->getKind()) {
case BuiltinType::Bool:
case BuiltinType::Char_S:
case BuiltinType::Char_U:
case BuiltinType::SChar:
case BuiltinType::UChar:
case BuiltinType::Short:
case BuiltinType::UShort:
case BuiltinType::WChar_S:
case BuiltinType::WChar_U:
case BuiltinType::Char8:
case BuiltinType::Char16:
case BuiltinType::Char32:
return true;
default:
return false;
}
// Enumerated types are promotable to their compatible integer types
// (C99 6.3.1.1) a.k.a. its underlying type (C++ [conv.prom]p2).
if (const auto *ET = getAs<EnumType>()){
if (this->isDependentType() || ET->getDecl()->getPromotionType().isNull()
|| ET->getDecl()->isScoped())
return false;
return true;
}
return false;
}
bool Type::isSpecifierType() const {
// Note that this intentionally does not use the canonical type.
switch (getTypeClass()) {
case Builtin:
case Record:
case Enum:
case Typedef:
case Complex:
case TypeOfExpr:
case TypeOf:
case TemplateTypeParm:
case SubstTemplateTypeParm:
case TemplateSpecialization:
case Elaborated:
case DependentName:
case DependentTemplateSpecialization:
case ObjCInterface:
case ObjCObject:
case ObjCObjectPointer: // FIXME: object pointers aren't really specifiers
return true;
default:
return false;
}
}
ElaboratedTypeKeyword
TypeWithKeyword::getKeywordForTypeSpec(unsigned TypeSpec) {
switch (TypeSpec) {
default: return ETK_None;
case TST_typename: return ETK_Typename;
case TST_class: return ETK_Class;
case TST_struct: return ETK_Struct;
case TST_interface: return ETK_Interface;
case TST_union: return ETK_Union;
case TST_enum: return ETK_Enum;
}
}
TagTypeKind
TypeWithKeyword::getTagTypeKindForTypeSpec(unsigned TypeSpec) {
switch(TypeSpec) {
case TST_class: return TTK_Class;
case TST_struct: return TTK_Struct;
case TST_interface: return TTK_Interface;
case TST_union: return TTK_Union;
case TST_enum: return TTK_Enum;
}
llvm_unreachable("Type specifier is not a tag type kind.");
}
ElaboratedTypeKeyword
TypeWithKeyword::getKeywordForTagTypeKind(TagTypeKind Kind) {
switch (Kind) {
case TTK_Class: return ETK_Class;
case TTK_Struct: return ETK_Struct;
case TTK_Interface: return ETK_Interface;
case TTK_Union: return ETK_Union;
case TTK_Enum: return ETK_Enum;
}
llvm_unreachable("Unknown tag type kind.");
}
TagTypeKind
TypeWithKeyword::getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword) {
switch (Keyword) {
case ETK_Class: return TTK_Class;
case ETK_Struct: return TTK_Struct;
case ETK_Interface: return TTK_Interface;
case ETK_Union: return TTK_Union;
case ETK_Enum: return TTK_Enum;
case ETK_None: // Fall through.
case ETK_Typename:
llvm_unreachable("Elaborated type keyword is not a tag type kind.");
}
llvm_unreachable("Unknown elaborated type keyword.");
}
bool
TypeWithKeyword::KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword) {
switch (Keyword) {
case ETK_None:
case ETK_Typename:
return false;
case ETK_Class:
case ETK_Struct:
case ETK_Interface:
case ETK_Union:
case ETK_Enum:
return true;
}
llvm_unreachable("Unknown elaborated type keyword.");
}
StringRef TypeWithKeyword::getKeywordName(ElaboratedTypeKeyword Keyword) {
switch (Keyword) {
case ETK_None: return {};
case ETK_Typename: return "typename";
case ETK_Class: return "class";
case ETK_Struct: return "struct";
case ETK_Interface: return "__interface";
case ETK_Union: return "union";
case ETK_Enum: return "enum";
}
llvm_unreachable("Unknown elaborated type keyword.");
}
DependentTemplateSpecializationType::DependentTemplateSpecializationType(
ElaboratedTypeKeyword Keyword,
NestedNameSpecifier *NNS, const IdentifierInfo *Name,
ArrayRef<TemplateArgument> Args,
QualType Canon)
: TypeWithKeyword(Keyword, DependentTemplateSpecialization, Canon, true, true,
/*VariablyModified=*/false,
NNS && NNS->containsUnexpandedParameterPack()),
NNS(NNS), Name(Name) {
DependentTemplateSpecializationTypeBits.NumArgs = Args.size();
assert((!NNS || NNS->isDependent()) &&
"DependentTemplateSpecializatonType requires dependent qualifier");
TemplateArgument *ArgBuffer = getArgBuffer();
for (const TemplateArgument &Arg : Args) {
if (Arg.containsUnexpandedParameterPack())
setContainsUnexpandedParameterPack();
new (ArgBuffer++) TemplateArgument(Arg);
}
}
void
DependentTemplateSpecializationType::Profile(llvm::FoldingSetNodeID &ID,
const ASTContext &Context,
ElaboratedTypeKeyword Keyword,
NestedNameSpecifier *Qualifier,
const IdentifierInfo *Name,
ArrayRef<TemplateArgument> Args) {
ID.AddInteger(Keyword);
ID.AddPointer(Qualifier);
ID.AddPointer(Name);
for (const TemplateArgument &Arg : Args)
Arg.Profile(ID, Context);
}
bool Type::isElaboratedTypeSpecifier() const {
ElaboratedTypeKeyword Keyword;
if (const auto *Elab = dyn_cast<ElaboratedType>(this))
Keyword = Elab->getKeyword();
else if (const auto *DepName = dyn_cast<DependentNameType>(this))
Keyword = DepName->getKeyword();
else if (const auto *DepTST =
dyn_cast<DependentTemplateSpecializationType>(this))
Keyword = DepTST->getKeyword();
else
return false;
return TypeWithKeyword::KeywordIsTagTypeKind(Keyword);
}
const char *Type::getTypeClassName() const {
switch (TypeBits.TC) {
#define ABSTRACT_TYPE(Derived, Base)
#define TYPE(Derived, Base) case Derived: return #Derived;
#include "clang/AST/TypeNodes.inc"
}
llvm_unreachable("Invalid type class.");
}
StringRef BuiltinType::getName(const PrintingPolicy &Policy) const {
switch (getKind()) {
case Void:
return "void";
case Bool:
return Policy.Bool ? "bool" : "_Bool";
case Char_S:
return "char";
case Char_U:
return "char";
case SChar:
return "signed char";
case Short:
return "short";
case Int:
return "int";
case Long:
return "long";
case LongLong:
return "long long";
case Int128:
return "__int128";
case UChar:
return "unsigned char";
case UShort:
return "unsigned short";
case UInt:
return "unsigned int";
case ULong:
return "unsigned long";
case ULongLong:
return "unsigned long long";
case UInt128:
return "unsigned __int128";
case Half:
return Policy.Half ? "half" : "__fp16";
case Float:
return "float";
case Double:
return "double";
case LongDouble:
return "long double";
case ShortAccum:
return "short _Accum";
case Accum:
return "_Accum";
case LongAccum:
return "long _Accum";
case UShortAccum:
return "unsigned short _Accum";
case UAccum:
return "unsigned _Accum";
case ULongAccum:
return "unsigned long _Accum";
case BuiltinType::ShortFract:
return "short _Fract";
case BuiltinType::Fract:
return "_Fract";
case BuiltinType::LongFract:
return "long _Fract";
case BuiltinType::UShortFract:
return "unsigned short _Fract";
case BuiltinType::UFract:
return "unsigned _Fract";
case BuiltinType::ULongFract:
return "unsigned long _Fract";
case BuiltinType::SatShortAccum:
return "_Sat short _Accum";
case BuiltinType::SatAccum:
return "_Sat _Accum";
case BuiltinType::SatLongAccum:
return "_Sat long _Accum";
case BuiltinType::SatUShortAccum:
return "_Sat unsigned short _Accum";
case BuiltinType::SatUAccum:
return "_Sat unsigned _Accum";
case BuiltinType::SatULongAccum:
return "_Sat unsigned long _Accum";
case BuiltinType::SatShortFract:
return "_Sat short _Fract";
case BuiltinType::SatFract:
return "_Sat _Fract";
case BuiltinType::SatLongFract:
return "_Sat long _Fract";
case BuiltinType::SatUShortFract:
return "_Sat unsigned short _Fract";
case BuiltinType::SatUFract:
return "_Sat unsigned _Fract";
case BuiltinType::SatULongFract:
return "_Sat unsigned long _Fract";
case Float16:
return "_Float16";
case Float128:
return "__float128";
case WChar_S:
case WChar_U:
return Policy.MSWChar ? "__wchar_t" : "wchar_t";
case Char8:
return "char8_t";
case Char16:
return "char16_t";
case Char32:
return "char32_t";
case NullPtr:
return "nullptr_t";
case Overload:
return "<overloaded function type>";
case BoundMember:
return "<bound member function type>";
case PseudoObject:
return "<pseudo-object type>";
case Dependent:
return "<dependent type>";
case UnknownAny:
return "<unknown type>";
case ARCUnbridgedCast:
return "<ARC unbridged cast type>";
case BuiltinFn:
return "<builtin fn type>";
case ObjCId:
return "id";
case ObjCClass:
return "Class";
case ObjCSel:
return "SEL";
#define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
case Id: \
return "__" #Access " " #ImgType "_t";
#include "clang/Basic/OpenCLImageTypes.def"
case OCLSampler:
return "sampler_t";
case OCLEvent:
return "event_t";
case OCLClkEvent:
return "clk_event_t";
case OCLQueue:
return "queue_t";
case OCLReserveID:
return "reserve_id_t";
case OMPArraySection:
return "<OpenMP array section type>";
#define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \
case Id: \
return #ExtType;
#include "clang/Basic/OpenCLExtensionTypes.def"
#define SVE_TYPE(Name, Id, SingletonId) \
case Id: \
return Name;
#include "clang/Basic/AArch64SVEACLETypes.def"
}
llvm_unreachable("Invalid builtin type.");
}
QualType QualType::getNonLValueExprType(const ASTContext &Context) const {
if (const auto *RefType = getTypePtr()->getAs<ReferenceType>())
return RefType->getPointeeType();
// C++0x [basic.lval]:
// Class prvalues can have cv-qualified types; non-class prvalues always
// have cv-unqualified types.
//
// See also C99 6.3.2.1p2.
if (!Context.getLangOpts().CPlusPlus ||
(!getTypePtr()->isDependentType() && !getTypePtr()->isRecordType()))
return getUnqualifiedType();
return *this;
}
StringRef FunctionType::getNameForCallConv(CallingConv CC) {
switch (CC) {
case CC_C: return "cdecl";
case CC_X86StdCall: return "stdcall";
case CC_X86FastCall: return "fastcall";
case CC_X86ThisCall: return "thiscall";
case CC_X86Pascal: return "pascal";
case CC_X86VectorCall: return "vectorcall";
case CC_Win64: return "ms_abi";
case CC_X86_64SysV: return "sysv_abi";
case CC_X86RegCall : return "regcall";
case CC_AAPCS: return "aapcs";
case CC_AAPCS_VFP: return "aapcs-vfp";
case CC_AArch64VectorCall: return "aarch64_vector_pcs";
case CC_IntelOclBicc: return "intel_ocl_bicc";
case CC_SpirFunction: return "spir_function";
case CC_OpenCLKernel: return "opencl_kernel";
case CC_Swift: return "swiftcall";
case CC_PreserveMost: return "preserve_most";
case CC_PreserveAll: return "preserve_all";
}
llvm_unreachable("Invalid calling convention.");
}
FunctionProtoType::FunctionProtoType(QualType result, ArrayRef<QualType> params,
QualType canonical,
const ExtProtoInfo &epi)
: FunctionType(FunctionProto, result, canonical, result->isDependentType(),
result->isInstantiationDependentType(),
result->isVariablyModifiedType(),
result->containsUnexpandedParameterPack(), epi.ExtInfo) {
FunctionTypeBits.FastTypeQuals = epi.TypeQuals.getFastQualifiers();
FunctionTypeBits.RefQualifier = epi.RefQualifier;
FunctionTypeBits.NumParams = params.size();
assert(getNumParams() == params.size() && "NumParams overflow!");
FunctionTypeBits.ExceptionSpecType = epi.ExceptionSpec.Type;
FunctionTypeBits.HasExtParameterInfos = !!epi.ExtParameterInfos;
FunctionTypeBits.Variadic = epi.Variadic;
FunctionTypeBits.HasTrailingReturn = epi.HasTrailingReturn;
// Fill in the extra trailing bitfields if present.
if (hasExtraBitfields(epi.ExceptionSpec.Type)) {
auto &ExtraBits = *getTrailingObjects<FunctionTypeExtraBitfields>();
ExtraBits.NumExceptionType = epi.ExceptionSpec.Exceptions.size();
}
// Fill in the trailing argument array.
auto *argSlot = getTrailingObjects<QualType>();
for (unsigned i = 0; i != getNumParams(); ++i) {
if (params[i]->isDependentType())
setDependent();
else if (params[i]->isInstantiationDependentType())
setInstantiationDependent();
if (params[i]->containsUnexpandedParameterPack())
setContainsUnexpandedParameterPack();
argSlot[i] = params[i];
}
// Fill in the exception type array if present.
if (getExceptionSpecType() == EST_Dynamic) {
assert(hasExtraBitfields() && "missing trailing extra bitfields!");
auto *exnSlot =
reinterpret_cast<QualType *>(getTrailingObjects<ExceptionType>());
unsigned I = 0;
for (QualType ExceptionType : epi.ExceptionSpec.Exceptions) {
// Note that, before C++17, a dependent exception specification does
// *not* make a type dependent; it's not even part of the C++ type
// system.
if (ExceptionType->isInstantiationDependentType())
setInstantiationDependent();
if (ExceptionType->containsUnexpandedParameterPack())
setContainsUnexpandedParameterPack();
exnSlot[I++] = ExceptionType;
}
}
// Fill in the Expr * in the exception specification if present.
else if (isComputedNoexcept(getExceptionSpecType())) {
assert(epi.ExceptionSpec.NoexceptExpr && "computed noexcept with no expr");
assert((getExceptionSpecType() == EST_DependentNoexcept) ==
epi.ExceptionSpec.NoexceptExpr->isValueDependent());
// Store the noexcept expression and context.
*getTrailingObjects<Expr *>() = epi.ExceptionSpec.NoexceptExpr;
if (epi.ExceptionSpec.NoexceptExpr->isValueDependent() ||
epi.ExceptionSpec.NoexceptExpr->isInstantiationDependent())
setInstantiationDependent();
if (epi.ExceptionSpec.NoexceptExpr->containsUnexpandedParameterPack())
setContainsUnexpandedParameterPack();
}
// Fill in the FunctionDecl * in the exception specification if present.
else if (getExceptionSpecType() == EST_Uninstantiated) {
// Store the function decl from which we will resolve our
// exception specification.
auto **slot = getTrailingObjects<FunctionDecl *>();
slot[0] = epi.ExceptionSpec.SourceDecl;
slot[1] = epi.ExceptionSpec.SourceTemplate;
// This exception specification doesn't make the type dependent, because
// it's not instantiated as part of instantiating the type.
} else if (getExceptionSpecType() == EST_Unevaluated) {
// Store the function decl from which we will resolve our
// exception specification.
auto **slot = getTrailingObjects<FunctionDecl *>();
slot[0] = epi.ExceptionSpec.SourceDecl;
}
// If this is a canonical type, and its exception specification is dependent,
// then it's a dependent type. This only happens in C++17 onwards.
if (isCanonicalUnqualified()) {
if (getExceptionSpecType() == EST_Dynamic ||
getExceptionSpecType() == EST_DependentNoexcept) {
assert(hasDependentExceptionSpec() && "type should not be canonical");
setDependent();
}
} else if (getCanonicalTypeInternal()->isDependentType()) {
// Ask our canonical type whether our exception specification was dependent.
setDependent();
}
// Fill in the extra parameter info if present.
if (epi.ExtParameterInfos) {
auto *extParamInfos = getTrailingObjects<ExtParameterInfo>();
for (unsigned i = 0; i != getNumParams(); ++i)
extParamInfos[i] = epi.ExtParameterInfos[i];
}
if (epi.TypeQuals.hasNonFastQualifiers()) {
FunctionTypeBits.HasExtQuals = 1;
*getTrailingObjects<Qualifiers>() = epi.TypeQuals;
} else {
FunctionTypeBits.HasExtQuals = 0;
}
}
bool FunctionProtoType::hasDependentExceptionSpec() const {
if (Expr *NE = getNoexceptExpr())
return NE->isValueDependent();
for (QualType ET : exceptions())
// A pack expansion with a non-dependent pattern is still dependent,
// because we don't know whether the pattern is in the exception spec
// or not (that depends on whether the pack has 0 expansions).
if (ET->isDependentType() || ET->getAs<PackExpansionType>())
return true;
return false;
}
bool FunctionProtoType::hasInstantiationDependentExceptionSpec() const {
if (Expr *NE = getNoexceptExpr())
return NE->isInstantiationDependent();
for (QualType ET : exceptions())
if (ET->isInstantiationDependentType())
return true;
return false;
}
CanThrowResult FunctionProtoType::canThrow() const {
switch (getExceptionSpecType()) {
case EST_Unparsed:
case EST_Unevaluated:
case EST_Uninstantiated:
llvm_unreachable("should not call this with unresolved exception specs");
case EST_DynamicNone:
case EST_BasicNoexcept:
case EST_NoexceptTrue:
case EST_NoThrow:
return CT_Cannot;
case EST_None:
case EST_MSAny:
case EST_NoexceptFalse:
return CT_Can;
case EST_Dynamic:
// A dynamic exception specification is throwing unless every exception
// type is an (unexpanded) pack expansion type.
for (unsigned I = 0; I != getNumExceptions(); ++I)
if (!getExceptionType(I)->getAs<PackExpansionType>())
return CT_Can;
return CT_Dependent;
case EST_DependentNoexcept:
return CT_Dependent;
}
llvm_unreachable("unexpected exception specification kind");
}
bool FunctionProtoType::isTemplateVariadic() const {
for (unsigned ArgIdx = getNumParams(); ArgIdx; --ArgIdx)
if (isa<PackExpansionType>(getParamType(ArgIdx - 1)))
return true;
return false;
}
void FunctionProtoType::Profile(llvm::FoldingSetNodeID &ID, QualType Result,
const QualType *ArgTys, unsigned NumParams,
const ExtProtoInfo &epi,
const ASTContext &Context, bool Canonical) {
// We have to be careful not to get ambiguous profile encodings.
// Note that valid type pointers are never ambiguous with anything else.
//
// The encoding grammar begins:
// type type* bool int bool
// If that final bool is true, then there is a section for the EH spec:
// bool type*
// This is followed by an optional "consumed argument" section of the
// same length as the first type sequence:
// bool*
// Finally, we have the ext info and trailing return type flag:
// int bool
//
// There is no ambiguity between the consumed arguments and an empty EH
// spec because of the leading 'bool' which unambiguously indicates
// whether the following bool is the EH spec or part of the arguments.
ID.AddPointer(Result.getAsOpaquePtr());
for (unsigned i = 0; i != NumParams; ++i)
ID.AddPointer(ArgTys[i].getAsOpaquePtr());
// This method is relatively performance sensitive, so as a performance
// shortcut, use one AddInteger call instead of four for the next four
// fields.
assert(!(unsigned(epi.Variadic) & ~1) &&
!(unsigned(epi.RefQualifier) & ~3) &&
!(unsigned(epi.ExceptionSpec.Type) & ~15) &&
"Values larger than expected.");
ID.AddInteger(unsigned(epi.Variadic) +
(epi.RefQualifier << 1) +
(epi.ExceptionSpec.Type << 3));
ID.Add(epi.TypeQuals);
if (epi.ExceptionSpec.Type == EST_Dynamic) {
for (QualType Ex : epi.ExceptionSpec.Exceptions)
ID.AddPointer(Ex.getAsOpaquePtr());
} else if (isComputedNoexcept(epi.ExceptionSpec.Type)) {
epi.ExceptionSpec.NoexceptExpr->Profile(ID, Context, Canonical);
} else if (epi.ExceptionSpec.Type == EST_Uninstantiated ||
epi.ExceptionSpec.Type == EST_Unevaluated) {
ID.AddPointer(epi.ExceptionSpec.SourceDecl->getCanonicalDecl());
}
if (epi.ExtParameterInfos) {
for (unsigned i = 0; i != NumParams; ++i)
ID.AddInteger(epi.ExtParameterInfos[i].getOpaqueValue());
}
epi.ExtInfo.Profile(ID);
ID.AddBoolean(epi.HasTrailingReturn);
}
void FunctionProtoType::Profile(llvm::FoldingSetNodeID &ID,
const ASTContext &Ctx) {
Profile(ID, getReturnType(), param_type_begin(), getNumParams(),
getExtProtoInfo(), Ctx, isCanonicalUnqualified());
}
QualType TypedefType::desugar() const {
return getDecl()->getUnderlyingType();
}
QualType MacroQualifiedType::desugar() const { return getUnderlyingType(); }
QualType MacroQualifiedType::getModifiedType() const {
// Step over MacroQualifiedTypes from the same macro to find the type
// ultimately qualified by the macro qualifier.
QualType Inner = cast<AttributedType>(getUnderlyingType())->getModifiedType();
while (auto *InnerMQT = dyn_cast<MacroQualifiedType>(Inner)) {
if (InnerMQT->getMacroIdentifier() != getMacroIdentifier())
break;
Inner = InnerMQT->getModifiedType();
}
return Inner;
}
TypeOfExprType::TypeOfExprType(Expr *E, QualType can)
: Type(TypeOfExpr, can, E->isTypeDependent(),
E->isInstantiationDependent(),
E->getType()->isVariablyModifiedType(),
E->containsUnexpandedParameterPack()),
TOExpr(E) {}
bool TypeOfExprType::isSugared() const {
return !TOExpr->isTypeDependent();
}
QualType TypeOfExprType::desugar() const {
if (isSugared())
return getUnderlyingExpr()->getType();
return QualType(this, 0);
}
void DependentTypeOfExprType::Profile(llvm::FoldingSetNodeID &ID,
const ASTContext &Context, Expr *E) {
E->Profile(ID, Context, true);
}
DecltypeType::DecltypeType(Expr *E, QualType underlyingType, QualType can)
// C++11 [temp.type]p2: "If an expression e involves a template parameter,
// decltype(e) denotes a unique dependent type." Hence a decltype type is
// type-dependent even if its expression is only instantiation-dependent.
: Type(Decltype, can, E->isInstantiationDependent(),
E->isInstantiationDependent(),
E->getType()->isVariablyModifiedType(),
E->containsUnexpandedParameterPack()),
E(E), UnderlyingType(underlyingType) {}
bool DecltypeType::isSugared() const { return !E->isInstantiationDependent(); }
QualType DecltypeType::desugar() const {
if (isSugared())
return getUnderlyingType();
return QualType(this, 0);
}
DependentDecltypeType::DependentDecltypeType(const ASTContext &Context, Expr *E)
: DecltypeType(E, Context.DependentTy), Context(Context) {}
void DependentDecltypeType::Profile(llvm::FoldingSetNodeID &ID,
const ASTContext &Context, Expr *E) {
E->Profile(ID, Context, true);
}
UnaryTransformType::UnaryTransformType(QualType BaseType,
QualType UnderlyingType,
UTTKind UKind,
QualType CanonicalType)
: Type(UnaryTransform, CanonicalType, BaseType->isDependentType(),
BaseType->isInstantiationDependentType(),
BaseType->isVariablyModifiedType(),
BaseType->containsUnexpandedParameterPack()),
BaseType(BaseType), UnderlyingType(UnderlyingType), UKind(UKind) {}
DependentUnaryTransformType::DependentUnaryTransformType(const ASTContext &C,
QualType BaseType,
UTTKind UKind)
: UnaryTransformType(BaseType, C.DependentTy, UKind, QualType()) {}
TagType::TagType(TypeClass TC, const TagDecl *D, QualType can)
: Type(TC, can, D->isDependentType(),
/*InstantiationDependent=*/D->isDependentType(),
/*VariablyModified=*/false,
/*ContainsUnexpandedParameterPack=*/false),
decl(const_cast<TagDecl*>(D)) {}
static TagDecl *getInterestingTagDecl(TagDecl *decl) {
for (auto I : decl->redecls()) {
if (I->isCompleteDefinition() || I->isBeingDefined())
return I;
}
// If there's no definition (not even in progress), return what we have.
return decl;
}
TagDecl *TagType::getDecl() const {
return getInterestingTagDecl(decl);
}
bool TagType::isBeingDefined() const {
return getDecl()->isBeingDefined();
}
bool RecordType::hasConstFields() const {
std::vector<const RecordType*> RecordTypeList;
RecordTypeList.push_back(this);
unsigned NextToCheckIndex = 0;
while (RecordTypeList.size() > NextToCheckIndex) {
for (FieldDecl *FD :
RecordTypeList[NextToCheckIndex]->getDecl()->fields()) {
QualType FieldTy = FD->getType();
if (FieldTy.isConstQualified())
return true;
FieldTy = FieldTy.getCanonicalType();
if (const auto *FieldRecTy = FieldTy->getAs<RecordType>()) {
if (llvm::find(RecordTypeList, FieldRecTy) == RecordTypeList.end())
RecordTypeList.push_back(FieldRecTy);
}
}
++NextToCheckIndex;
}
return false;
}
bool AttributedType::isQualifier() const {
// FIXME: Generate this with TableGen.
switch (getAttrKind()) {
// These are type qualifiers in the traditional C sense: they annotate
// something about a specific value/variable of a type. (They aren't
// always part of the canonical type, though.)
case attr::ObjCGC:
case attr::ObjCOwnership:
case attr::ObjCInertUnsafeUnretained:
case attr::TypeNonNull:
case attr::TypeNullable:
case attr::TypeNullUnspecified:
case attr::LifetimeBound:
case attr::AddressSpace:
return true;
// All other type attributes aren't qualifiers; they rewrite the modified
// type to be a semantically different type.
default:
return false;
}
}
bool AttributedType::isMSTypeSpec() const {
// FIXME: Generate this with TableGen?
switch (getAttrKind()) {
default: return false;
case attr::Ptr32:
case attr::Ptr64:
case attr::SPtr:
case attr::UPtr:
return true;
}
llvm_unreachable("invalid attr kind");
}
bool AttributedType::isCallingConv() const {
// FIXME: Generate this with TableGen.
switch (getAttrKind()) {
default: return false;
case attr::Pcs:
case attr::CDecl:
case attr::FastCall:
case attr::StdCall:
case attr::ThisCall:
case attr::RegCall:
case attr::SwiftCall:
case attr::VectorCall:
case attr::AArch64VectorPcs:
case attr::Pascal:
case attr::MSABI:
case attr::SysVABI:
case attr::IntelOclBicc:
case attr::PreserveMost:
case attr::PreserveAll:
return true;
}
llvm_unreachable("invalid attr kind");
}
CXXRecordDecl *InjectedClassNameType::getDecl() const {
return cast<CXXRecordDecl>(getInterestingTagDecl(Decl));
}
IdentifierInfo *TemplateTypeParmType::getIdentifier() const {
return isCanonicalUnqualified() ? nullptr : getDecl()->getIdentifier();
}
SubstTemplateTypeParmPackType::
SubstTemplateTypeParmPackType(const TemplateTypeParmType *Param,
QualType Canon,
const TemplateArgument &ArgPack)
: Type(SubstTemplateTypeParmPack, Canon, true, true, false, true),
Replaced(Param), Arguments(ArgPack.pack_begin()) {
SubstTemplateTypeParmPackTypeBits.NumArgs = ArgPack.pack_size();
}
TemplateArgument SubstTemplateTypeParmPackType::getArgumentPack() const {
return TemplateArgument(llvm::makeArrayRef(Arguments, getNumArgs()));
}
void SubstTemplateTypeParmPackType::Profile(llvm::FoldingSetNodeID &ID) {
Profile(ID, getReplacedParameter(), getArgumentPack());
}
void SubstTemplateTypeParmPackType::Profile(llvm::FoldingSetNodeID &ID,
const TemplateTypeParmType *Replaced,
const TemplateArgument &ArgPack) {
ID.AddPointer(Replaced);
ID.AddInteger(ArgPack.pack_size());
for (const auto &P : ArgPack.pack_elements())
ID.AddPointer(P.getAsType().getAsOpaquePtr());
}
bool TemplateSpecializationType::
anyDependentTemplateArguments(const TemplateArgumentListInfo &Args,
bool &InstantiationDependent) {
return anyDependentTemplateArguments(Args.arguments(),
InstantiationDependent);
}
bool TemplateSpecializationType::
anyDependentTemplateArguments(ArrayRef<TemplateArgumentLoc> Args,
bool &InstantiationDependent) {
for (const TemplateArgumentLoc &ArgLoc : Args) {
if (ArgLoc.getArgument().isDependent()) {
InstantiationDependent = true;
return true;
}
if (ArgLoc.getArgument().isInstantiationDependent())
InstantiationDependent = true;
}
return false;
}
TemplateSpecializationType::
TemplateSpecializationType(TemplateName T,
ArrayRef<TemplateArgument> Args,
QualType Canon, QualType AliasedType)
: Type(TemplateSpecialization,
Canon.isNull()? QualType(this, 0) : Canon,
Canon.isNull()? true : Canon->isDependentType(),
Canon.isNull()? true : Canon->isInstantiationDependentType(),
false,
T.containsUnexpandedParameterPack()), Template(T) {
TemplateSpecializationTypeBits.NumArgs = Args.size();
TemplateSpecializationTypeBits.TypeAlias = !AliasedType.isNull();
assert(!T.getAsDependentTemplateName() &&
"Use DependentTemplateSpecializationType for dependent template-name");
assert((T.getKind() == TemplateName::Template ||
T.getKind() == TemplateName::SubstTemplateTemplateParm ||
T.getKind() == TemplateName::SubstTemplateTemplateParmPack) &&
"Unexpected template name for TemplateSpecializationType");
auto *TemplateArgs = reinterpret_cast<TemplateArgument *>(this + 1);
for (const TemplateArgument &Arg : Args) {
// Update instantiation-dependent and variably-modified bits.
// If the canonical type exists and is non-dependent, the template
// specialization type can be non-dependent even if one of the type
// arguments is. Given:
// template<typename T> using U = int;
// U<T> is always non-dependent, irrespective of the type T.
// However, U<Ts> contains an unexpanded parameter pack, even though
// its expansion (and thus its desugared type) doesn't.
if (Arg.isInstantiationDependent())
setInstantiationDependent();
if (Arg.getKind() == TemplateArgument::Type &&
Arg.getAsType()->isVariablyModifiedType())
setVariablyModified();
if (Arg.containsUnexpandedParameterPack())
setContainsUnexpandedParameterPack();
new (TemplateArgs++) TemplateArgument(Arg);
}
// Store the aliased type if this is a type alias template specialization.
if (isTypeAlias()) {
auto *Begin = reinterpret_cast<TemplateArgument *>(this + 1);
*reinterpret_cast<QualType*>(Begin + getNumArgs()) = AliasedType;
}
}
void
TemplateSpecializationType::Profile(llvm::FoldingSetNodeID &ID,
TemplateName T,
ArrayRef<TemplateArgument> Args,
const ASTContext &Context) {
T.Profile(ID);
for (const TemplateArgument &Arg : Args)
Arg.Profile(ID, Context);
}
QualType
QualifierCollector::apply(const ASTContext &Context, QualType QT) const {
if (!hasNonFastQualifiers())
return QT.withFastQualifiers(getFastQualifiers());
return Context.getQualifiedType(QT, *this);
}
QualType
QualifierCollector::apply(const ASTContext &Context, const Type *T) const {
if (!hasNonFastQualifiers())
return QualType(T, getFastQualifiers());
return Context.getQualifiedType(T, *this);
}
void ObjCObjectTypeImpl::Profile(llvm::FoldingSetNodeID &ID,
QualType BaseType,
ArrayRef<QualType> typeArgs,
ArrayRef<ObjCProtocolDecl *> protocols,
bool isKindOf) {
ID.AddPointer(BaseType.getAsOpaquePtr());
ID.AddInteger(typeArgs.size());
for (auto typeArg : typeArgs)
ID.AddPointer(typeArg.getAsOpaquePtr());
ID.AddInteger(protocols.size());
for (auto proto : protocols)
ID.AddPointer(proto);
ID.AddBoolean(isKindOf);
}
void ObjCObjectTypeImpl::Profile(llvm::FoldingSetNodeID &ID) {
Profile(ID, getBaseType(), getTypeArgsAsWritten(),
llvm::makeArrayRef(qual_begin(), getNumProtocols()),
isKindOfTypeAsWritten());
}
void ObjCTypeParamType::Profile(llvm::FoldingSetNodeID &ID,
const ObjCTypeParamDecl *OTPDecl,
ArrayRef<ObjCProtocolDecl *> protocols) {
ID.AddPointer(OTPDecl);
ID.AddInteger(protocols.size());
for (auto proto : protocols)
ID.AddPointer(proto);
}
void ObjCTypeParamType::Profile(llvm::FoldingSetNodeID &ID) {
Profile(ID, getDecl(),
llvm::makeArrayRef(qual_begin(), getNumProtocols()));
}
namespace {
/// The cached properties of a type.
class CachedProperties {
Linkage L;
bool local;
public:
CachedProperties(Linkage L, bool local) : L(L), local(local) {}
Linkage getLinkage() const { return L; }
bool hasLocalOrUnnamedType() const { return local; }
friend CachedProperties merge(CachedProperties L, CachedProperties R) {
Linkage MergedLinkage = minLinkage(L.L, R.L);
return CachedProperties(MergedLinkage,
L.hasLocalOrUnnamedType() | R.hasLocalOrUnnamedType());
}
};
} // namespace
static CachedProperties computeCachedProperties(const Type *T);
namespace clang {
/// The type-property cache. This is templated so as to be
/// instantiated at an internal type to prevent unnecessary symbol
/// leakage.
template <class Private> class TypePropertyCache {
public:
static CachedProperties get(QualType T) {
return get(T.getTypePtr());
}
static CachedProperties get(const Type *T) {
ensure(T);
return CachedProperties(T->TypeBits.getLinkage(),
T->TypeBits.hasLocalOrUnnamedType());
}
static void ensure(const Type *T) {
// If the cache is valid, we're okay.
if (T->TypeBits.isCacheValid()) return;
// If this type is non-canonical, ask its canonical type for the
// relevant information.
if (!T->isCanonicalUnqualified()) {
const Type *CT = T->getCanonicalTypeInternal().getTypePtr();
ensure(CT);
T->TypeBits.CacheValid = true;
T->TypeBits.CachedLinkage = CT->TypeBits.CachedLinkage;
T->TypeBits.CachedLocalOrUnnamed = CT->TypeBits.CachedLocalOrUnnamed;
return;
}
// Compute the cached properties and then set the cache.
CachedProperties Result = computeCachedProperties(T);
T->TypeBits.CacheValid = true;
T->TypeBits.CachedLinkage = Result.getLinkage();
T->TypeBits.CachedLocalOrUnnamed = Result.hasLocalOrUnnamedType();
}
};
} // namespace clang
// Instantiate the friend template at a private class. In a
// reasonable implementation, these symbols will be internal.
// It is terrible that this is the best way to accomplish this.
namespace {
class Private {};
} // namespace
using Cache = TypePropertyCache<Private>;
static CachedProperties computeCachedProperties(const Type *T) {
switch (T->getTypeClass()) {
#define TYPE(Class,Base)
#define NON_CANONICAL_TYPE(Class,Base) case Type::Class:
#include "clang/AST/TypeNodes.inc"
llvm_unreachable("didn't expect a non-canonical type here");
#define TYPE(Class,Base)
#define DEPENDENT_TYPE(Class,Base) case Type::Class:
#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class,Base) case Type::Class:
#include "clang/AST/TypeNodes.inc"
// Treat instantiation-dependent types as external.
if (!T->isInstantiationDependentType()) T->dump();
assert(T->isInstantiationDependentType());
return CachedProperties(ExternalLinkage, false);
case Type::Auto:
case Type::DeducedTemplateSpecialization:
// Give non-deduced 'auto' types external linkage. We should only see them
// here in error recovery.
return CachedProperties(ExternalLinkage, false);
case Type::Builtin:
// C++ [basic.link]p8:
// A type is said to have linkage if and only if:
// - it is a fundamental type (3.9.1); or
return CachedProperties(ExternalLinkage, false);
case Type::Record:
case Type::Enum: {
const TagDecl *Tag = cast<TagType>(T)->getDecl();
// C++ [basic.link]p8:
// - it is a class or enumeration type that is named (or has a name
// for linkage purposes (7.1.3)) and the name has linkage; or
// - it is a specialization of a class template (14); or
Linkage L = Tag->getLinkageInternal();
bool IsLocalOrUnnamed =
Tag->getDeclContext()->isFunctionOrMethod() ||
!Tag->hasNameForLinkage();
return CachedProperties(L, IsLocalOrUnnamed);
}
// C++ [basic.link]p8:
// - it is a compound type (3.9.2) other than a class or enumeration,
// compounded exclusively from types that have linkage; or
case Type::Complex:
return Cache::get(cast<ComplexType>(T)->getElementType());
case Type::Pointer:
return Cache::get(cast<PointerType>(T)->getPointeeType());
case Type::BlockPointer:
return Cache::get(cast<BlockPointerType>(T)->getPointeeType());
case Type::LValueReference:
case Type::RValueReference:
return Cache::get(cast<ReferenceType>(T)->getPointeeType());
case Type::MemberPointer: {
const auto *MPT = cast<MemberPointerType>(T);
return merge(Cache::get(MPT->getClass()),
Cache::get(MPT->getPointeeType()));
}
case Type::ConstantArray:
case Type::IncompleteArray:
case Type::VariableArray:
return Cache::get(cast<ArrayType>(T)->getElementType());
case Type::Vector:
case Type::ExtVector:
return Cache::get(cast<VectorType>(T)->getElementType());
case Type::FunctionNoProto:
return Cache::get(cast<FunctionType>(T)->getReturnType());
case Type::FunctionProto: {
const auto *FPT = cast<FunctionProtoType>(T);
CachedProperties result = Cache::get(FPT->getReturnType());
for (const auto &ai : FPT->param_types())
result = merge(result, Cache::get(ai));
return result;
}
case Type::ObjCInterface: {
Linkage L = cast<ObjCInterfaceType>(T)->getDecl()->getLinkageInternal();
return CachedProperties(L, false);
}
case Type::ObjCObject:
return Cache::get(cast<ObjCObjectType>(T)->getBaseType());
case Type::ObjCObjectPointer:
return Cache::get(cast<ObjCObjectPointerType>(T)->getPointeeType());
case Type::Atomic:
return Cache::get(cast<AtomicType>(T)->getValueType());
case Type::Pipe:
return Cache::get(cast<PipeType>(T)->getElementType());
}
llvm_unreachable("unhandled type class");
}
/// Determine the linkage of this type.
Linkage Type::getLinkage() const {
Cache::ensure(this);
return TypeBits.getLinkage();
}
bool Type::hasUnnamedOrLocalType() const {
Cache::ensure(this);
return TypeBits.hasLocalOrUnnamedType();
}
LinkageInfo LinkageComputer::computeTypeLinkageInfo(const Type *T) {
switch (T->getTypeClass()) {
#define TYPE(Class,Base)
#define NON_CANONICAL_TYPE(Class,Base) case Type::Class:
#include "clang/AST/TypeNodes.inc"
llvm_unreachable("didn't expect a non-canonical type here");
#define TYPE(Class,Base)
#define DEPENDENT_TYPE(Class,Base) case Type::Class:
#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class,Base) case Type::Class:
#include "clang/AST/TypeNodes.inc"
// Treat instantiation-dependent types as external.
assert(T->isInstantiationDependentType());
return LinkageInfo::external();
case Type::Builtin:
return LinkageInfo::external();
case Type::Auto:
case Type::DeducedTemplateSpecialization:
return LinkageInfo::external();
case Type::Record:
case Type::Enum:
return getDeclLinkageAndVisibility(cast<TagType>(T)->getDecl());
case Type::Complex:
return computeTypeLinkageInfo(cast<ComplexType>(T)->getElementType());
case Type::Pointer:
return computeTypeLinkageInfo(cast<PointerType>(T)->getPointeeType());
case Type::BlockPointer:
return computeTypeLinkageInfo(cast<BlockPointerType>(T)->getPointeeType());
case Type::LValueReference:
case Type::RValueReference:
return computeTypeLinkageInfo(cast<ReferenceType>(T)->getPointeeType());
case Type::MemberPointer: {
const auto *MPT = cast<MemberPointerType>(T);
LinkageInfo LV = computeTypeLinkageInfo(MPT->getClass());
LV.merge(computeTypeLinkageInfo(MPT->getPointeeType()));
return LV;
}
case Type::ConstantArray:
case Type::IncompleteArray:
case Type::VariableArray:
return computeTypeLinkageInfo(cast<ArrayType>(T)->getElementType());
case Type::Vector:
case Type::ExtVector:
return computeTypeLinkageInfo(cast<VectorType>(T)->getElementType());
case Type::FunctionNoProto:
return computeTypeLinkageInfo(cast<FunctionType>(T)->getReturnType());
case Type::FunctionProto: {
const auto *FPT = cast<FunctionProtoType>(T);
LinkageInfo LV = computeTypeLinkageInfo(FPT->getReturnType());
for (const auto &ai : FPT->param_types())
LV.merge(computeTypeLinkageInfo(ai));
return LV;
}
case Type::ObjCInterface:
return getDeclLinkageAndVisibility(cast<ObjCInterfaceType>(T)->getDecl());
case Type::ObjCObject:
return computeTypeLinkageInfo(cast<ObjCObjectType>(T)->getBaseType());
case Type::ObjCObjectPointer:
return computeTypeLinkageInfo(
cast<ObjCObjectPointerType>(T)->getPointeeType());
case Type::Atomic:
return computeTypeLinkageInfo(cast<AtomicType>(T)->getValueType());
case Type::Pipe:
return computeTypeLinkageInfo(cast<PipeType>(T)->getElementType());
}
llvm_unreachable("unhandled type class");
}
bool Type::isLinkageValid() const {
if (!TypeBits.isCacheValid())
return true;
Linkage L = LinkageComputer{}
.computeTypeLinkageInfo(getCanonicalTypeInternal())
.getLinkage();
return L == TypeBits.getLinkage();
}
LinkageInfo LinkageComputer::getTypeLinkageAndVisibility(const Type *T) {
if (!T->isCanonicalUnqualified())
return computeTypeLinkageInfo(T->getCanonicalTypeInternal());
LinkageInfo LV = computeTypeLinkageInfo(T);
assert(LV.getLinkage() == T->getLinkage());
return LV;
}
LinkageInfo Type::getLinkageAndVisibility() const {
return LinkageComputer{}.getTypeLinkageAndVisibility(this);
}
Optional<NullabilityKind>
Type::getNullability(const ASTContext &Context) const {
QualType Type(this, 0);
while (const auto *AT = Type->getAs<AttributedType>()) {
// Check whether this is an attributed type with nullability
// information.
if (auto Nullability = AT->getImmediateNullability())
return Nullability;
Type = AT->getEquivalentType();
}
return None;
}
bool Type::canHaveNullability(bool ResultIfUnknown) const {
QualType type = getCanonicalTypeInternal();
switch (type->getTypeClass()) {
// We'll only see canonical types here.
#define NON_CANONICAL_TYPE(Class, Parent) \
case Type::Class: \
llvm_unreachable("non-canonical type");
#define TYPE(Class, Parent)
#include "clang/AST/TypeNodes.inc"
// Pointer types.
case Type::Pointer:
case Type::BlockPointer:
case Type::MemberPointer:
case Type::ObjCObjectPointer:
return true;
// Dependent types that could instantiate to pointer types.
case Type::UnresolvedUsing:
case Type::TypeOfExpr:
case Type::TypeOf:
case Type::Decltype:
case Type::UnaryTransform:
case Type::TemplateTypeParm:
case Type::SubstTemplateTypeParmPack:
case Type::DependentName:
case Type::DependentTemplateSpecialization:
case Type::Auto:
return ResultIfUnknown;
// Dependent template specializations can instantiate to pointer
// types unless they're known to be specializations of a class
// template.
case Type::TemplateSpecialization:
if (TemplateDecl *templateDecl
= cast<TemplateSpecializationType>(type.getTypePtr())
->getTemplateName().getAsTemplateDecl()) {
if (isa<ClassTemplateDecl>(templateDecl))
return false;
}
return ResultIfUnknown;
case Type::Builtin:
switch (cast<BuiltinType>(type.getTypePtr())->getKind()) {
// Signed, unsigned, and floating-point types cannot have nullability.
#define SIGNED_TYPE(Id, SingletonId) case BuiltinType::Id:
#define UNSIGNED_TYPE(Id, SingletonId) case BuiltinType::Id:
#define FLOATING_TYPE(Id, SingletonId) case BuiltinType::Id:
#define BUILTIN_TYPE(Id, SingletonId)
#include "clang/AST/BuiltinTypes.def"
return false;
// Dependent types that could instantiate to a pointer type.
case BuiltinType::Dependent:
case BuiltinType::Overload:
case BuiltinType::BoundMember:
case BuiltinType::PseudoObject:
case BuiltinType::UnknownAny:
case BuiltinType::ARCUnbridgedCast:
return ResultIfUnknown;
case BuiltinType::Void:
case BuiltinType::ObjCId:
case BuiltinType::ObjCClass:
case BuiltinType::ObjCSel:
#define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
case BuiltinType::Id:
#include "clang/Basic/OpenCLImageTypes.def"
#define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \
case BuiltinType::Id:
#include "clang/Basic/OpenCLExtensionTypes.def"
case BuiltinType::OCLSampler:
case BuiltinType::OCLEvent:
case BuiltinType::OCLClkEvent:
case BuiltinType::OCLQueue:
case BuiltinType::OCLReserveID:
#define SVE_TYPE(Name, Id, SingletonId) \
case BuiltinType::Id:
#include "clang/Basic/AArch64SVEACLETypes.def"
case BuiltinType::BuiltinFn:
case BuiltinType::NullPtr:
case BuiltinType::OMPArraySection:
return false;
}
llvm_unreachable("unknown builtin type");
// Non-pointer types.
case Type::Complex:
case Type::LValueReference:
case Type::RValueReference:
case Type::ConstantArray:
case Type::IncompleteArray:
case Type::VariableArray:
case Type::DependentSizedArray:
case Type::DependentVector:
case Type::DependentSizedExtVector:
case Type::Vector:
case Type::ExtVector:
case Type::DependentAddressSpace:
case Type::FunctionProto:
case Type::FunctionNoProto:
case Type::Record:
case Type::DeducedTemplateSpecialization:
case Type::Enum:
case Type::InjectedClassName:
case Type::PackExpansion:
case Type::ObjCObject:
case Type::ObjCInterface:
case Type::Atomic:
case Type::Pipe:
return false;
}
llvm_unreachable("bad type kind!");
}
llvm::Optional<NullabilityKind>
AttributedType::getImmediateNullability() const {
if (getAttrKind() == attr::TypeNonNull)
return NullabilityKind::NonNull;
if (getAttrKind() == attr::TypeNullable)
return NullabilityKind::Nullable;
if (getAttrKind() == attr::TypeNullUnspecified)
return NullabilityKind::Unspecified;
return None;
}
Optional<NullabilityKind> AttributedType::stripOuterNullability(QualType &T) {
QualType AttrTy = T;
if (auto MacroTy = dyn_cast<MacroQualifiedType>(T))
AttrTy = MacroTy->getUnderlyingType();
if (auto attributed = dyn_cast<AttributedType>(AttrTy)) {
if (auto nullability = attributed->getImmediateNullability()) {
T = attributed->getModifiedType();
return nullability;
}
}
return None;
}
bool Type::isBlockCompatibleObjCPointerType(ASTContext &ctx) const {
const auto *objcPtr = getAs<ObjCObjectPointerType>();
if (!objcPtr)
return false;
if (objcPtr->isObjCIdType()) {
// id is always okay.
return true;
}
// Blocks are NSObjects.
if (ObjCInterfaceDecl *iface = objcPtr->getInterfaceDecl()) {
if (iface->getIdentifier() != ctx.getNSObjectName())
return false;
// Continue to check qualifiers, below.
} else if (objcPtr->isObjCQualifiedIdType()) {
// Continue to check qualifiers, below.
} else {
return false;
}
// Check protocol qualifiers.
for (ObjCProtocolDecl *proto : objcPtr->quals()) {
// Blocks conform to NSObject and NSCopying.
if (proto->getIdentifier() != ctx.getNSObjectName() &&
proto->getIdentifier() != ctx.getNSCopyingName())
return false;
}
return true;
}
Qualifiers::ObjCLifetime Type::getObjCARCImplicitLifetime() const {
if (isObjCARCImplicitlyUnretainedType())
return Qualifiers::OCL_ExplicitNone;
return Qualifiers::OCL_Strong;
}
bool Type::isObjCARCImplicitlyUnretainedType() const {
assert(isObjCLifetimeType() &&
"cannot query implicit lifetime for non-inferrable type");
const Type *canon = getCanonicalTypeInternal().getTypePtr();
// Walk down to the base type. We don't care about qualifiers for this.
while (const auto *array = dyn_cast<ArrayType>(canon))
canon = array->getElementType().getTypePtr();
if (const auto *opt = dyn_cast<ObjCObjectPointerType>(canon)) {
// Class and Class<Protocol> don't require retention.
if (opt->getObjectType()->isObjCClass())
return true;
}
return false;
}
bool Type::isObjCNSObjectType() const {
const Type *cur = this;
while (true) {
if (const auto *typedefType = dyn_cast<TypedefType>(cur))
return typedefType->getDecl()->hasAttr<ObjCNSObjectAttr>();
// Single-step desugar until we run out of sugar.
QualType next = cur->getLocallyUnqualifiedSingleStepDesugaredType();
if (next.getTypePtr() == cur) return false;
cur = next.getTypePtr();
}
}
bool Type::isObjCIndependentClassType() const {
if (const auto *typedefType = dyn_cast<TypedefType>(this))
return typedefType->getDecl()->hasAttr<ObjCIndependentClassAttr>();
return false;
}
bool Type::isObjCRetainableType() const {
return isObjCObjectPointerType() ||
isBlockPointerType() ||
isObjCNSObjectType();
}
bool Type::isObjCIndirectLifetimeType() const {
if (isObjCLifetimeType())
return true;
if (const auto *OPT = getAs<PointerType>())
return OPT->getPointeeType()->isObjCIndirectLifetimeType();
if (const auto *Ref = getAs<ReferenceType>())
return Ref->getPointeeType()->isObjCIndirectLifetimeType();
if (const auto *MemPtr = getAs<MemberPointerType>())
return MemPtr->getPointeeType()->isObjCIndirectLifetimeType();
return false;
}
/// Returns true if objects of this type have lifetime semantics under
/// ARC.
bool Type::isObjCLifetimeType() const {
const Type *type = this;
while (const ArrayType *array = type->getAsArrayTypeUnsafe())
type = array->getElementType().getTypePtr();
return type->isObjCRetainableType();
}
/// Determine whether the given type T is a "bridgable" Objective-C type,
/// which is either an Objective-C object pointer type or an
bool Type::isObjCARCBridgableType() const {
return isObjCObjectPointerType() || isBlockPointerType();
}
/// Determine whether the given type T is a "bridgeable" C type.
bool Type::isCARCBridgableType() const {
const auto *Pointer = getAs<PointerType>();
if (!Pointer)
return false;
QualType Pointee = Pointer->getPointeeType();
return Pointee->isVoidType() || Pointee->isRecordType();
}
bool Type::hasSizedVLAType() const {
if (!isVariablyModifiedType()) return false;
if (const auto *ptr = getAs<PointerType>())
return ptr->getPointeeType()->hasSizedVLAType();
if (const auto *ref = getAs<ReferenceType>())
return ref->getPointeeType()->hasSizedVLAType();
if (const ArrayType *arr = getAsArrayTypeUnsafe()) {
if (isa<VariableArrayType>(arr) &&
cast<VariableArrayType>(arr)->getSizeExpr())
return true;
return arr->getElementType()->hasSizedVLAType();
}
return false;
}
QualType::DestructionKind QualType::isDestructedTypeImpl(QualType type) {
switch (type.getObjCLifetime()) {
case Qualifiers::OCL_None:
case Qualifiers::OCL_ExplicitNone:
case Qualifiers::OCL_Autoreleasing:
break;
case Qualifiers::OCL_Strong:
return DK_objc_strong_lifetime;
case Qualifiers::OCL_Weak:
return DK_objc_weak_lifetime;
}
if (const auto *RT =
type->getBaseElementTypeUnsafe()->getAs<RecordType>()) {
const RecordDecl *RD = RT->getDecl();
if (const auto *CXXRD = dyn_cast<CXXRecordDecl>(RD)) {
/// Check if this is a C++ object with a non-trivial destructor.
if (CXXRD->hasDefinition() && !CXXRD->hasTrivialDestructor())
return DK_cxx_destructor;
} else {
/// Check if this is a C struct that is non-trivial to destroy or an array
/// that contains such a struct.
if (RD->isNonTrivialToPrimitiveDestroy())
return DK_nontrivial_c_struct;
}
}
return DK_none;
}
CXXRecordDecl *MemberPointerType::getMostRecentCXXRecordDecl() const {
return getClass()->getAsCXXRecordDecl()->getMostRecentNonInjectedDecl();
}
void clang::FixedPointValueToString(SmallVectorImpl<char> &Str,
llvm::APSInt Val, unsigned Scale) {
FixedPointSemantics FXSema(Val.getBitWidth(), Scale, Val.isSigned(),
/*IsSaturated=*/false,
/*HasUnsignedPadding=*/false);
APFixedPoint(Val, FXSema).toString(Str);
}