1 //===--- Type.cpp - Type representation and manipulation ------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements type-related functionality.
12 //===----------------------------------------------------------------------===//
14 #include "clang/AST/ASTContext.h"
15 #include "clang/AST/Attr.h"
16 #include "clang/AST/CharUnits.h"
17 #include "clang/AST/DeclCXX.h"
18 #include "clang/AST/DeclObjC.h"
19 #include "clang/AST/DeclTemplate.h"
20 #include "clang/AST/Expr.h"
21 #include "clang/AST/PrettyPrinter.h"
22 #include "clang/AST/Type.h"
23 #include "clang/AST/TypeVisitor.h"
24 #include "clang/Basic/Specifiers.h"
25 #include "clang/Basic/TargetInfo.h"
26 #include "llvm/ADT/APSInt.h"
27 #include "llvm/ADT/StringExtras.h"
28 #include "llvm/Support/raw_ostream.h"
30 using namespace clang;
32 bool Qualifiers::isStrictSupersetOf(Qualifiers Other) const {
33 return (*this != Other) &&
34 // CVR qualifiers superset
35 (((Mask & CVRMask) | (Other.Mask & CVRMask)) == (Mask & CVRMask)) &&
36 // ObjC GC qualifiers superset
37 ((getObjCGCAttr() == Other.getObjCGCAttr()) ||
38 (hasObjCGCAttr() && !Other.hasObjCGCAttr())) &&
39 // Address space superset.
40 ((getAddressSpace() == Other.getAddressSpace()) ||
41 (hasAddressSpace()&& !Other.hasAddressSpace())) &&
42 // Lifetime qualifier superset.
43 ((getObjCLifetime() == Other.getObjCLifetime()) ||
44 (hasObjCLifetime() && !Other.hasObjCLifetime()));
47 const IdentifierInfo* QualType::getBaseTypeIdentifier() const {
48 const Type* ty = getTypePtr();
49 NamedDecl *ND = nullptr;
50 if (ty->isPointerType() || ty->isReferenceType())
51 return ty->getPointeeType().getBaseTypeIdentifier();
52 else if (ty->isRecordType())
53 ND = ty->getAs<RecordType>()->getDecl();
54 else if (ty->isEnumeralType())
55 ND = ty->getAs<EnumType>()->getDecl();
56 else if (ty->getTypeClass() == Type::Typedef)
57 ND = ty->getAs<TypedefType>()->getDecl();
58 else if (ty->isArrayType())
59 return ty->castAsArrayTypeUnsafe()->
60 getElementType().getBaseTypeIdentifier();
63 return ND->getIdentifier();
67 bool QualType::isConstant(QualType T, const ASTContext &Ctx) {
68 if (T.isConstQualified())
71 if (const ArrayType *AT = Ctx.getAsArrayType(T))
72 return AT->getElementType().isConstant(Ctx);
74 return T.getAddressSpace() == LangAS::opencl_constant;
77 unsigned ConstantArrayType::getNumAddressingBits(const ASTContext &Context,
79 const llvm::APInt &NumElements) {
80 uint64_t ElementSize = Context.getTypeSizeInChars(ElementType).getQuantity();
82 // Fast path the common cases so we can avoid the conservative computation
83 // below, which in common cases allocates "large" APSInt values, which are
86 // If the element size is a power of 2, we can directly compute the additional
87 // number of addressing bits beyond those required for the element count.
88 if (llvm::isPowerOf2_64(ElementSize)) {
89 return NumElements.getActiveBits() + llvm::Log2_64(ElementSize);
92 // If both the element count and element size fit in 32-bits, we can do the
93 // computation directly in 64-bits.
94 if ((ElementSize >> 32) == 0 && NumElements.getBitWidth() <= 64 &&
95 (NumElements.getZExtValue() >> 32) == 0) {
96 uint64_t TotalSize = NumElements.getZExtValue() * ElementSize;
97 return 64 - llvm::countLeadingZeros(TotalSize);
100 // Otherwise, use APSInt to handle arbitrary sized values.
101 llvm::APSInt SizeExtended(NumElements, true);
102 unsigned SizeTypeBits = Context.getTypeSize(Context.getSizeType());
103 SizeExtended = SizeExtended.extend(std::max(SizeTypeBits,
104 SizeExtended.getBitWidth()) * 2);
106 llvm::APSInt TotalSize(llvm::APInt(SizeExtended.getBitWidth(), ElementSize));
107 TotalSize *= SizeExtended;
109 return TotalSize.getActiveBits();
112 unsigned ConstantArrayType::getMaxSizeBits(const ASTContext &Context) {
113 unsigned Bits = Context.getTypeSize(Context.getSizeType());
115 // Limit the number of bits in size_t so that maximal bit size fits 64 bit
116 // integer (see PR8256). We can do this as currently there is no hardware
117 // that supports full 64-bit virtual space.
124 DependentSizedArrayType::DependentSizedArrayType(const ASTContext &Context,
125 QualType et, QualType can,
126 Expr *e, ArraySizeModifier sm,
128 SourceRange brackets)
129 : ArrayType(DependentSizedArray, et, can, sm, tq,
130 (et->containsUnexpandedParameterPack() ||
131 (e && e->containsUnexpandedParameterPack()))),
132 Context(Context), SizeExpr((Stmt*) e), Brackets(brackets)
136 void DependentSizedArrayType::Profile(llvm::FoldingSetNodeID &ID,
137 const ASTContext &Context,
139 ArraySizeModifier SizeMod,
142 ID.AddPointer(ET.getAsOpaquePtr());
143 ID.AddInteger(SizeMod);
144 ID.AddInteger(TypeQuals);
145 E->Profile(ID, Context, true);
148 DependentSizedExtVectorType::DependentSizedExtVectorType(const
150 QualType ElementType,
154 : Type(DependentSizedExtVector, can, /*Dependent=*/true,
155 /*InstantiationDependent=*/true,
156 ElementType->isVariablyModifiedType(),
157 (ElementType->containsUnexpandedParameterPack() ||
158 (SizeExpr && SizeExpr->containsUnexpandedParameterPack()))),
159 Context(Context), SizeExpr(SizeExpr), ElementType(ElementType),
165 DependentSizedExtVectorType::Profile(llvm::FoldingSetNodeID &ID,
166 const ASTContext &Context,
167 QualType ElementType, Expr *SizeExpr) {
168 ID.AddPointer(ElementType.getAsOpaquePtr());
169 SizeExpr->Profile(ID, Context, true);
172 VectorType::VectorType(QualType vecType, unsigned nElements, QualType canonType,
174 : VectorType(Vector, vecType, nElements, canonType, vecKind) {}
176 VectorType::VectorType(TypeClass tc, QualType vecType, unsigned nElements,
177 QualType canonType, VectorKind vecKind)
178 : Type(tc, canonType, vecType->isDependentType(),
179 vecType->isInstantiationDependentType(),
180 vecType->isVariablyModifiedType(),
181 vecType->containsUnexpandedParameterPack()),
184 VectorTypeBits.VecKind = vecKind;
185 VectorTypeBits.NumElements = nElements;
188 /// getArrayElementTypeNoTypeQual - If this is an array type, return the
189 /// element type of the array, potentially with type qualifiers missing.
190 /// This method should never be used when type qualifiers are meaningful.
191 const Type *Type::getArrayElementTypeNoTypeQual() const {
192 // If this is directly an array type, return it.
193 if (const ArrayType *ATy = dyn_cast<ArrayType>(this))
194 return ATy->getElementType().getTypePtr();
196 // If the canonical form of this type isn't the right kind, reject it.
197 if (!isa<ArrayType>(CanonicalType))
200 // If this is a typedef for an array type, strip the typedef off without
201 // losing all typedef information.
202 return cast<ArrayType>(getUnqualifiedDesugaredType())
203 ->getElementType().getTypePtr();
206 /// getDesugaredType - Return the specified type with any "sugar" removed from
207 /// the type. This takes off typedefs, typeof's etc. If the outer level of
208 /// the type is already concrete, it returns it unmodified. This is similar
209 /// to getting the canonical type, but it doesn't remove *all* typedefs. For
210 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is
212 QualType QualType::getDesugaredType(QualType T, const ASTContext &Context) {
213 SplitQualType split = getSplitDesugaredType(T);
214 return Context.getQualifiedType(split.Ty, split.Quals);
217 QualType QualType::getSingleStepDesugaredTypeImpl(QualType type,
218 const ASTContext &Context) {
219 SplitQualType split = type.split();
220 QualType desugar = split.Ty->getLocallyUnqualifiedSingleStepDesugaredType();
221 return Context.getQualifiedType(desugar, split.Quals);
224 QualType Type::getLocallyUnqualifiedSingleStepDesugaredType() const {
225 switch (getTypeClass()) {
226 #define ABSTRACT_TYPE(Class, Parent)
227 #define TYPE(Class, Parent) \
228 case Type::Class: { \
229 const Class##Type *ty = cast<Class##Type>(this); \
230 if (!ty->isSugared()) return QualType(ty, 0); \
231 return ty->desugar(); \
233 #include "clang/AST/TypeNodes.def"
235 llvm_unreachable("bad type kind!");
238 SplitQualType QualType::getSplitDesugaredType(QualType T) {
239 QualifierCollector Qs;
243 const Type *CurTy = Qs.strip(Cur);
244 switch (CurTy->getTypeClass()) {
245 #define ABSTRACT_TYPE(Class, Parent)
246 #define TYPE(Class, Parent) \
247 case Type::Class: { \
248 const Class##Type *Ty = cast<Class##Type>(CurTy); \
249 if (!Ty->isSugared()) \
250 return SplitQualType(Ty, Qs); \
251 Cur = Ty->desugar(); \
254 #include "clang/AST/TypeNodes.def"
259 SplitQualType QualType::getSplitUnqualifiedTypeImpl(QualType type) {
260 SplitQualType split = type.split();
262 // All the qualifiers we've seen so far.
263 Qualifiers quals = split.Quals;
265 // The last type node we saw with any nodes inside it.
266 const Type *lastTypeWithQuals = split.Ty;
271 // Do a single-step desugar, aborting the loop if the type isn't
273 switch (split.Ty->getTypeClass()) {
274 #define ABSTRACT_TYPE(Class, Parent)
275 #define TYPE(Class, Parent) \
276 case Type::Class: { \
277 const Class##Type *ty = cast<Class##Type>(split.Ty); \
278 if (!ty->isSugared()) goto done; \
279 next = ty->desugar(); \
282 #include "clang/AST/TypeNodes.def"
285 // Otherwise, split the underlying type. If that yields qualifiers,
286 // update the information.
287 split = next.split();
288 if (!split.Quals.empty()) {
289 lastTypeWithQuals = split.Ty;
290 quals.addConsistentQualifiers(split.Quals);
295 return SplitQualType(lastTypeWithQuals, quals);
298 QualType QualType::IgnoreParens(QualType T) {
299 // FIXME: this seems inherently un-qualifiers-safe.
300 while (const ParenType *PT = T->getAs<ParenType>())
301 T = PT->getInnerType();
305 /// \brief This will check for a T (which should be a Type which can act as
306 /// sugar, such as a TypedefType) by removing any existing sugar until it
307 /// reaches a T or a non-sugared type.
308 template<typename T> static const T *getAsSugar(const Type *Cur) {
310 if (const T *Sugar = dyn_cast<T>(Cur))
312 switch (Cur->getTypeClass()) {
313 #define ABSTRACT_TYPE(Class, Parent)
314 #define TYPE(Class, Parent) \
315 case Type::Class: { \
316 const Class##Type *Ty = cast<Class##Type>(Cur); \
317 if (!Ty->isSugared()) return 0; \
318 Cur = Ty->desugar().getTypePtr(); \
321 #include "clang/AST/TypeNodes.def"
326 template <> const TypedefType *Type::getAs() const {
327 return getAsSugar<TypedefType>(this);
330 template <> const TemplateSpecializationType *Type::getAs() const {
331 return getAsSugar<TemplateSpecializationType>(this);
334 template <> const AttributedType *Type::getAs() const {
335 return getAsSugar<AttributedType>(this);
338 /// getUnqualifiedDesugaredType - Pull any qualifiers and syntactic
339 /// sugar off the given type. This should produce an object of the
340 /// same dynamic type as the canonical type.
341 const Type *Type::getUnqualifiedDesugaredType() const {
342 const Type *Cur = this;
345 switch (Cur->getTypeClass()) {
346 #define ABSTRACT_TYPE(Class, Parent)
347 #define TYPE(Class, Parent) \
349 const Class##Type *Ty = cast<Class##Type>(Cur); \
350 if (!Ty->isSugared()) return Cur; \
351 Cur = Ty->desugar().getTypePtr(); \
354 #include "clang/AST/TypeNodes.def"
358 bool Type::isClassType() const {
359 if (const RecordType *RT = getAs<RecordType>())
360 return RT->getDecl()->isClass();
363 bool Type::isStructureType() const {
364 if (const RecordType *RT = getAs<RecordType>())
365 return RT->getDecl()->isStruct();
368 bool Type::isObjCBoxableRecordType() const {
369 if (const RecordType *RT = getAs<RecordType>())
370 return RT->getDecl()->hasAttr<ObjCBoxableAttr>();
373 bool Type::isInterfaceType() const {
374 if (const RecordType *RT = getAs<RecordType>())
375 return RT->getDecl()->isInterface();
378 bool Type::isStructureOrClassType() const {
379 if (const RecordType *RT = getAs<RecordType>()) {
380 RecordDecl *RD = RT->getDecl();
381 return RD->isStruct() || RD->isClass() || RD->isInterface();
385 bool Type::isVoidPointerType() const {
386 if (const PointerType *PT = getAs<PointerType>())
387 return PT->getPointeeType()->isVoidType();
391 bool Type::isUnionType() const {
392 if (const RecordType *RT = getAs<RecordType>())
393 return RT->getDecl()->isUnion();
397 bool Type::isComplexType() const {
398 if (const ComplexType *CT = dyn_cast<ComplexType>(CanonicalType))
399 return CT->getElementType()->isFloatingType();
403 bool Type::isComplexIntegerType() const {
404 // Check for GCC complex integer extension.
405 return getAsComplexIntegerType();
408 const ComplexType *Type::getAsComplexIntegerType() const {
409 if (const ComplexType *Complex = getAs<ComplexType>())
410 if (Complex->getElementType()->isIntegerType())
415 QualType Type::getPointeeType() const {
416 if (const PointerType *PT = getAs<PointerType>())
417 return PT->getPointeeType();
418 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>())
419 return OPT->getPointeeType();
420 if (const BlockPointerType *BPT = getAs<BlockPointerType>())
421 return BPT->getPointeeType();
422 if (const ReferenceType *RT = getAs<ReferenceType>())
423 return RT->getPointeeType();
424 if (const MemberPointerType *MPT = getAs<MemberPointerType>())
425 return MPT->getPointeeType();
426 if (const DecayedType *DT = getAs<DecayedType>())
427 return DT->getPointeeType();
431 const RecordType *Type::getAsStructureType() const {
432 // If this is directly a structure type, return it.
433 if (const RecordType *RT = dyn_cast<RecordType>(this)) {
434 if (RT->getDecl()->isStruct())
438 // If the canonical form of this type isn't the right kind, reject it.
439 if (const RecordType *RT = dyn_cast<RecordType>(CanonicalType)) {
440 if (!RT->getDecl()->isStruct())
443 // If this is a typedef for a structure type, strip the typedef off without
444 // losing all typedef information.
445 return cast<RecordType>(getUnqualifiedDesugaredType());
450 const RecordType *Type::getAsUnionType() const {
451 // If this is directly a union type, return it.
452 if (const RecordType *RT = dyn_cast<RecordType>(this)) {
453 if (RT->getDecl()->isUnion())
457 // If the canonical form of this type isn't the right kind, reject it.
458 if (const RecordType *RT = dyn_cast<RecordType>(CanonicalType)) {
459 if (!RT->getDecl()->isUnion())
462 // If this is a typedef for a union type, strip the typedef off without
463 // losing all typedef information.
464 return cast<RecordType>(getUnqualifiedDesugaredType());
470 bool Type::isObjCIdOrObjectKindOfType(const ASTContext &ctx,
471 const ObjCObjectType *&bound) const {
474 const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>();
479 if (OPT->isObjCIdType())
482 // If it's not a __kindof type, reject it now.
483 if (!OPT->isKindOfType())
486 // If it's Class or qualified Class, it's not an object type.
487 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType())
490 // Figure out the type bound for the __kindof type.
491 bound = OPT->getObjectType()->stripObjCKindOfTypeAndQuals(ctx)
492 ->getAs<ObjCObjectType>();
496 bool Type::isObjCClassOrClassKindOfType() const {
497 const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>();
502 if (OPT->isObjCClassType())
505 // If it's not a __kindof type, reject it now.
506 if (!OPT->isKindOfType())
509 // If it's Class or qualified Class, it's a class __kindof type.
510 return OPT->isObjCClassType() || OPT->isObjCQualifiedClassType();
513 /// Was this type written with the special inert-in-MRC __unsafe_unretained
516 /// This approximates the answer to the following question: if this
517 /// translation unit were compiled in ARC, would this type be qualified
518 /// with __unsafe_unretained?
519 bool Type::isObjCInertUnsafeUnretainedType() const {
520 const Type *cur = this;
522 if (auto attributed = dyn_cast<AttributedType>(cur)) {
523 if (attributed->getAttrKind() ==
524 AttributedType::attr_objc_inert_unsafe_unretained)
528 // Single-step desugar until we run out of sugar.
529 QualType next = cur->getLocallyUnqualifiedSingleStepDesugaredType();
530 if (next.getTypePtr() == cur) return false;
531 cur = next.getTypePtr();
535 ObjCObjectType::ObjCObjectType(QualType Canonical, QualType Base,
536 ArrayRef<QualType> typeArgs,
537 ArrayRef<ObjCProtocolDecl *> protocols,
539 : Type(ObjCObject, Canonical, Base->isDependentType(),
540 Base->isInstantiationDependentType(),
541 Base->isVariablyModifiedType(),
542 Base->containsUnexpandedParameterPack()),
545 ObjCObjectTypeBits.IsKindOf = isKindOf;
547 ObjCObjectTypeBits.NumTypeArgs = typeArgs.size();
548 assert(getTypeArgsAsWritten().size() == typeArgs.size() &&
549 "bitfield overflow in type argument count");
550 ObjCObjectTypeBits.NumProtocols = protocols.size();
551 assert(getNumProtocols() == protocols.size() &&
552 "bitfield overflow in protocol count");
553 if (!typeArgs.empty())
554 memcpy(getTypeArgStorage(), typeArgs.data(),
555 typeArgs.size() * sizeof(QualType));
556 if (!protocols.empty())
557 memcpy(getProtocolStorage(), protocols.data(),
558 protocols.size() * sizeof(ObjCProtocolDecl*));
560 for (auto typeArg : typeArgs) {
561 if (typeArg->isDependentType())
563 else if (typeArg->isInstantiationDependentType())
564 setInstantiationDependent();
566 if (typeArg->containsUnexpandedParameterPack())
567 setContainsUnexpandedParameterPack();
571 bool ObjCObjectType::isSpecialized() const {
572 // If we have type arguments written here, the type is specialized.
573 if (ObjCObjectTypeBits.NumTypeArgs > 0)
576 // Otherwise, check whether the base type is specialized.
577 if (auto objcObject = getBaseType()->getAs<ObjCObjectType>()) {
578 // Terminate when we reach an interface type.
579 if (isa<ObjCInterfaceType>(objcObject))
582 return objcObject->isSpecialized();
589 ArrayRef<QualType> ObjCObjectType::getTypeArgs() const {
590 // We have type arguments written on this type.
591 if (isSpecializedAsWritten())
592 return getTypeArgsAsWritten();
594 // Look at the base type, which might have type arguments.
595 if (auto objcObject = getBaseType()->getAs<ObjCObjectType>()) {
596 // Terminate when we reach an interface type.
597 if (isa<ObjCInterfaceType>(objcObject))
600 return objcObject->getTypeArgs();
603 // No type arguments.
607 bool ObjCObjectType::isKindOfType() const {
608 if (isKindOfTypeAsWritten())
611 // Look at the base type, which might have type arguments.
612 if (auto objcObject = getBaseType()->getAs<ObjCObjectType>()) {
613 // Terminate when we reach an interface type.
614 if (isa<ObjCInterfaceType>(objcObject))
617 return objcObject->isKindOfType();
620 // Not a "__kindof" type.
624 QualType ObjCObjectType::stripObjCKindOfTypeAndQuals(
625 const ASTContext &ctx) const {
626 if (!isKindOfType() && qual_empty())
627 return QualType(this, 0);
629 // Recursively strip __kindof.
630 SplitQualType splitBaseType = getBaseType().split();
631 QualType baseType(splitBaseType.Ty, 0);
632 if (const ObjCObjectType *baseObj
633 = splitBaseType.Ty->getAs<ObjCObjectType>()) {
634 baseType = baseObj->stripObjCKindOfTypeAndQuals(ctx);
637 return ctx.getObjCObjectType(ctx.getQualifiedType(baseType,
638 splitBaseType.Quals),
639 getTypeArgsAsWritten(),
644 const ObjCObjectPointerType *ObjCObjectPointerType::stripObjCKindOfTypeAndQuals(
645 const ASTContext &ctx) const {
646 if (!isKindOfType() && qual_empty())
649 QualType obj = getObjectType()->stripObjCKindOfTypeAndQuals(ctx);
650 return ctx.getObjCObjectPointerType(obj)->castAs<ObjCObjectPointerType>();
656 QualType simpleTransform(ASTContext &ctx, QualType type, F &&f);
658 /// Visitor used by simpleTransform() to perform the transformation.
660 struct SimpleTransformVisitor
661 : public TypeVisitor<SimpleTransformVisitor<F>, QualType> {
665 QualType recurse(QualType type) {
666 return simpleTransform(Ctx, type, std::move(TheFunc));
670 SimpleTransformVisitor(ASTContext &ctx, F &&f) : Ctx(ctx), TheFunc(std::move(f)) { }
672 // None of the clients of this transformation can occur where
673 // there are dependent types, so skip dependent types.
674 #define TYPE(Class, Base)
675 #define DEPENDENT_TYPE(Class, Base) \
676 QualType Visit##Class##Type(const Class##Type *T) { return QualType(T, 0); }
677 #include "clang/AST/TypeNodes.def"
679 #define TRIVIAL_TYPE_CLASS(Class) \
680 QualType Visit##Class##Type(const Class##Type *T) { return QualType(T, 0); }
682 TRIVIAL_TYPE_CLASS(Builtin)
684 QualType VisitComplexType(const ComplexType *T) {
685 QualType elementType = recurse(T->getElementType());
686 if (elementType.isNull())
689 if (elementType.getAsOpaquePtr() == T->getElementType().getAsOpaquePtr())
690 return QualType(T, 0);
692 return Ctx.getComplexType(elementType);
695 QualType VisitPointerType(const PointerType *T) {
696 QualType pointeeType = recurse(T->getPointeeType());
697 if (pointeeType.isNull())
700 if (pointeeType.getAsOpaquePtr() == T->getPointeeType().getAsOpaquePtr())
701 return QualType(T, 0);
703 return Ctx.getPointerType(pointeeType);
706 QualType VisitBlockPointerType(const BlockPointerType *T) {
707 QualType pointeeType = recurse(T->getPointeeType());
708 if (pointeeType.isNull())
711 if (pointeeType.getAsOpaquePtr() == T->getPointeeType().getAsOpaquePtr())
712 return QualType(T, 0);
714 return Ctx.getBlockPointerType(pointeeType);
717 QualType VisitLValueReferenceType(const LValueReferenceType *T) {
718 QualType pointeeType = recurse(T->getPointeeTypeAsWritten());
719 if (pointeeType.isNull())
722 if (pointeeType.getAsOpaquePtr()
723 == T->getPointeeTypeAsWritten().getAsOpaquePtr())
724 return QualType(T, 0);
726 return Ctx.getLValueReferenceType(pointeeType, T->isSpelledAsLValue());
729 QualType VisitRValueReferenceType(const RValueReferenceType *T) {
730 QualType pointeeType = recurse(T->getPointeeTypeAsWritten());
731 if (pointeeType.isNull())
734 if (pointeeType.getAsOpaquePtr()
735 == T->getPointeeTypeAsWritten().getAsOpaquePtr())
736 return QualType(T, 0);
738 return Ctx.getRValueReferenceType(pointeeType);
741 QualType VisitMemberPointerType(const MemberPointerType *T) {
742 QualType pointeeType = recurse(T->getPointeeType());
743 if (pointeeType.isNull())
746 if (pointeeType.getAsOpaquePtr() == T->getPointeeType().getAsOpaquePtr())
747 return QualType(T, 0);
749 return Ctx.getMemberPointerType(pointeeType, T->getClass());
752 QualType VisitConstantArrayType(const ConstantArrayType *T) {
753 QualType elementType = recurse(T->getElementType());
754 if (elementType.isNull())
757 if (elementType.getAsOpaquePtr() == T->getElementType().getAsOpaquePtr())
758 return QualType(T, 0);
760 return Ctx.getConstantArrayType(elementType, T->getSize(),
761 T->getSizeModifier(),
762 T->getIndexTypeCVRQualifiers());
765 QualType VisitVariableArrayType(const VariableArrayType *T) {
766 QualType elementType = recurse(T->getElementType());
767 if (elementType.isNull())
770 if (elementType.getAsOpaquePtr() == T->getElementType().getAsOpaquePtr())
771 return QualType(T, 0);
773 return Ctx.getVariableArrayType(elementType, T->getSizeExpr(),
774 T->getSizeModifier(),
775 T->getIndexTypeCVRQualifiers(),
776 T->getBracketsRange());
779 QualType VisitIncompleteArrayType(const IncompleteArrayType *T) {
780 QualType elementType = recurse(T->getElementType());
781 if (elementType.isNull())
784 if (elementType.getAsOpaquePtr() == T->getElementType().getAsOpaquePtr())
785 return QualType(T, 0);
787 return Ctx.getIncompleteArrayType(elementType, T->getSizeModifier(),
788 T->getIndexTypeCVRQualifiers());
791 QualType VisitVectorType(const VectorType *T) {
792 QualType elementType = recurse(T->getElementType());
793 if (elementType.isNull())
796 if (elementType.getAsOpaquePtr() == T->getElementType().getAsOpaquePtr())
797 return QualType(T, 0);
799 return Ctx.getVectorType(elementType, T->getNumElements(),
803 QualType VisitExtVectorType(const ExtVectorType *T) {
804 QualType elementType = recurse(T->getElementType());
805 if (elementType.isNull())
808 if (elementType.getAsOpaquePtr() == T->getElementType().getAsOpaquePtr())
809 return QualType(T, 0);
811 return Ctx.getExtVectorType(elementType, T->getNumElements());
814 QualType VisitFunctionNoProtoType(const FunctionNoProtoType *T) {
815 QualType returnType = recurse(T->getReturnType());
816 if (returnType.isNull())
819 if (returnType.getAsOpaquePtr() == T->getReturnType().getAsOpaquePtr())
820 return QualType(T, 0);
822 return Ctx.getFunctionNoProtoType(returnType, T->getExtInfo());
825 QualType VisitFunctionProtoType(const FunctionProtoType *T) {
826 QualType returnType = recurse(T->getReturnType());
827 if (returnType.isNull())
830 // Transform parameter types.
831 SmallVector<QualType, 4> paramTypes;
832 bool paramChanged = false;
833 for (auto paramType : T->getParamTypes()) {
834 QualType newParamType = recurse(paramType);
835 if (newParamType.isNull())
838 if (newParamType.getAsOpaquePtr() != paramType.getAsOpaquePtr())
841 paramTypes.push_back(newParamType);
844 // Transform extended info.
845 FunctionProtoType::ExtProtoInfo info = T->getExtProtoInfo();
846 bool exceptionChanged = false;
847 if (info.ExceptionSpec.Type == EST_Dynamic) {
848 SmallVector<QualType, 4> exceptionTypes;
849 for (auto exceptionType : info.ExceptionSpec.Exceptions) {
850 QualType newExceptionType = recurse(exceptionType);
851 if (newExceptionType.isNull())
854 if (newExceptionType.getAsOpaquePtr()
855 != exceptionType.getAsOpaquePtr())
856 exceptionChanged = true;
858 exceptionTypes.push_back(newExceptionType);
861 if (exceptionChanged) {
862 info.ExceptionSpec.Exceptions =
863 llvm::makeArrayRef(exceptionTypes).copy(Ctx);
867 if (returnType.getAsOpaquePtr() == T->getReturnType().getAsOpaquePtr() &&
868 !paramChanged && !exceptionChanged)
869 return QualType(T, 0);
871 return Ctx.getFunctionType(returnType, paramTypes, info);
874 QualType VisitParenType(const ParenType *T) {
875 QualType innerType = recurse(T->getInnerType());
876 if (innerType.isNull())
879 if (innerType.getAsOpaquePtr() == T->getInnerType().getAsOpaquePtr())
880 return QualType(T, 0);
882 return Ctx.getParenType(innerType);
885 TRIVIAL_TYPE_CLASS(Typedef)
887 QualType VisitAdjustedType(const AdjustedType *T) {
888 QualType originalType = recurse(T->getOriginalType());
889 if (originalType.isNull())
892 QualType adjustedType = recurse(T->getAdjustedType());
893 if (adjustedType.isNull())
896 if (originalType.getAsOpaquePtr()
897 == T->getOriginalType().getAsOpaquePtr() &&
898 adjustedType.getAsOpaquePtr() == T->getAdjustedType().getAsOpaquePtr())
899 return QualType(T, 0);
901 return Ctx.getAdjustedType(originalType, adjustedType);
904 QualType VisitDecayedType(const DecayedType *T) {
905 QualType originalType = recurse(T->getOriginalType());
906 if (originalType.isNull())
909 if (originalType.getAsOpaquePtr()
910 == T->getOriginalType().getAsOpaquePtr())
911 return QualType(T, 0);
913 return Ctx.getDecayedType(originalType);
916 TRIVIAL_TYPE_CLASS(TypeOfExpr)
917 TRIVIAL_TYPE_CLASS(TypeOf)
918 TRIVIAL_TYPE_CLASS(Decltype)
919 TRIVIAL_TYPE_CLASS(UnaryTransform)
920 TRIVIAL_TYPE_CLASS(Record)
921 TRIVIAL_TYPE_CLASS(Enum)
923 // FIXME: Non-trivial to implement, but important for C++
924 TRIVIAL_TYPE_CLASS(Elaborated)
926 QualType VisitAttributedType(const AttributedType *T) {
927 QualType modifiedType = recurse(T->getModifiedType());
928 if (modifiedType.isNull())
931 QualType equivalentType = recurse(T->getEquivalentType());
932 if (equivalentType.isNull())
935 if (modifiedType.getAsOpaquePtr()
936 == T->getModifiedType().getAsOpaquePtr() &&
937 equivalentType.getAsOpaquePtr()
938 == T->getEquivalentType().getAsOpaquePtr())
939 return QualType(T, 0);
941 return Ctx.getAttributedType(T->getAttrKind(), modifiedType,
945 QualType VisitSubstTemplateTypeParmType(const SubstTemplateTypeParmType *T) {
946 QualType replacementType = recurse(T->getReplacementType());
947 if (replacementType.isNull())
950 if (replacementType.getAsOpaquePtr()
951 == T->getReplacementType().getAsOpaquePtr())
952 return QualType(T, 0);
954 return Ctx.getSubstTemplateTypeParmType(T->getReplacedParameter(),
958 // FIXME: Non-trivial to implement, but important for C++
959 TRIVIAL_TYPE_CLASS(TemplateSpecialization)
961 QualType VisitAutoType(const AutoType *T) {
963 return QualType(T, 0);
965 QualType deducedType = recurse(T->getDeducedType());
966 if (deducedType.isNull())
969 if (deducedType.getAsOpaquePtr()
970 == T->getDeducedType().getAsOpaquePtr())
971 return QualType(T, 0);
973 return Ctx.getAutoType(deducedType, T->getKeyword(),
974 T->isDependentType());
977 // FIXME: Non-trivial to implement, but important for C++
978 TRIVIAL_TYPE_CLASS(PackExpansion)
980 QualType VisitObjCObjectType(const ObjCObjectType *T) {
981 QualType baseType = recurse(T->getBaseType());
982 if (baseType.isNull())
985 // Transform type arguments.
986 bool typeArgChanged = false;
987 SmallVector<QualType, 4> typeArgs;
988 for (auto typeArg : T->getTypeArgsAsWritten()) {
989 QualType newTypeArg = recurse(typeArg);
990 if (newTypeArg.isNull())
993 if (newTypeArg.getAsOpaquePtr() != typeArg.getAsOpaquePtr())
994 typeArgChanged = true;
996 typeArgs.push_back(newTypeArg);
999 if (baseType.getAsOpaquePtr() == T->getBaseType().getAsOpaquePtr() &&
1001 return QualType(T, 0);
1003 return Ctx.getObjCObjectType(baseType, typeArgs,
1004 llvm::makeArrayRef(T->qual_begin(),
1005 T->getNumProtocols()),
1006 T->isKindOfTypeAsWritten());
1009 TRIVIAL_TYPE_CLASS(ObjCInterface)
1011 QualType VisitObjCObjectPointerType(const ObjCObjectPointerType *T) {
1012 QualType pointeeType = recurse(T->getPointeeType());
1013 if (pointeeType.isNull())
1016 if (pointeeType.getAsOpaquePtr()
1017 == T->getPointeeType().getAsOpaquePtr())
1018 return QualType(T, 0);
1020 return Ctx.getObjCObjectPointerType(pointeeType);
1023 QualType VisitAtomicType(const AtomicType *T) {
1024 QualType valueType = recurse(T->getValueType());
1025 if (valueType.isNull())
1028 if (valueType.getAsOpaquePtr()
1029 == T->getValueType().getAsOpaquePtr())
1030 return QualType(T, 0);
1032 return Ctx.getAtomicType(valueType);
1035 #undef TRIVIAL_TYPE_CLASS
1038 /// Perform a simple type transformation that does not change the
1039 /// semantics of the type.
1040 template<typename F>
1041 QualType simpleTransform(ASTContext &ctx, QualType type, F &&f) {
1042 // Transform the type. If it changed, return the transformed result.
1043 QualType transformed = f(type);
1044 if (transformed.getAsOpaquePtr() != type.getAsOpaquePtr())
1047 // Split out the qualifiers from the type.
1048 SplitQualType splitType = type.split();
1050 // Visit the type itself.
1051 SimpleTransformVisitor<F> visitor(ctx, std::move(f));
1052 QualType result = visitor.Visit(splitType.Ty);
1053 if (result.isNull())
1056 // Reconstruct the transformed type by applying the local qualifiers
1057 // from the split type.
1058 return ctx.getQualifiedType(result, splitType.Quals);
1061 } // end anonymous namespace
1063 /// Substitute the given type arguments for Objective-C type
1064 /// parameters within the given type, recursively.
1065 QualType QualType::substObjCTypeArgs(
1067 ArrayRef<QualType> typeArgs,
1068 ObjCSubstitutionContext context) const {
1069 return simpleTransform(ctx, *this,
1070 [&](QualType type) -> QualType {
1071 SplitQualType splitType = type.split();
1073 // Replace an Objective-C type parameter reference with the corresponding
1075 if (const auto *typedefTy = dyn_cast<TypedefType>(splitType.Ty)) {
1076 if (auto *typeParam = dyn_cast<ObjCTypeParamDecl>(typedefTy->getDecl())) {
1077 // If we have type arguments, use them.
1078 if (!typeArgs.empty()) {
1079 // FIXME: Introduce SubstObjCTypeParamType ?
1080 QualType argType = typeArgs[typeParam->getIndex()];
1081 return ctx.getQualifiedType(argType, splitType.Quals);
1085 case ObjCSubstitutionContext::Ordinary:
1086 case ObjCSubstitutionContext::Parameter:
1087 case ObjCSubstitutionContext::Superclass:
1088 // Substitute the bound.
1089 return ctx.getQualifiedType(typeParam->getUnderlyingType(),
1092 case ObjCSubstitutionContext::Result:
1093 case ObjCSubstitutionContext::Property: {
1094 // Substitute the __kindof form of the underlying type.
1095 const auto *objPtr = typeParam->getUnderlyingType()
1096 ->castAs<ObjCObjectPointerType>();
1098 // __kindof types, id, and Class don't need an additional
1100 if (objPtr->isKindOfType() || objPtr->isObjCIdOrClassType())
1101 return ctx.getQualifiedType(typeParam->getUnderlyingType(),
1105 const auto *obj = objPtr->getObjectType();
1106 QualType resultTy = ctx.getObjCObjectType(obj->getBaseType(),
1107 obj->getTypeArgsAsWritten(),
1108 obj->getProtocols(),
1111 // Rebuild object pointer type.
1112 resultTy = ctx.getObjCObjectPointerType(resultTy);
1113 return ctx.getQualifiedType(resultTy, splitType.Quals);
1119 // If we have a function type, update the context appropriately.
1120 if (const auto *funcType = dyn_cast<FunctionType>(splitType.Ty)) {
1121 // Substitute result type.
1122 QualType returnType = funcType->getReturnType().substObjCTypeArgs(
1125 ObjCSubstitutionContext::Result);
1126 if (returnType.isNull())
1129 // Handle non-prototyped functions, which only substitute into the result
1131 if (isa<FunctionNoProtoType>(funcType)) {
1132 // If the return type was unchanged, do nothing.
1133 if (returnType.getAsOpaquePtr()
1134 == funcType->getReturnType().getAsOpaquePtr())
1137 // Otherwise, build a new type.
1138 return ctx.getFunctionNoProtoType(returnType, funcType->getExtInfo());
1141 const auto *funcProtoType = cast<FunctionProtoType>(funcType);
1143 // Transform parameter types.
1144 SmallVector<QualType, 4> paramTypes;
1145 bool paramChanged = false;
1146 for (auto paramType : funcProtoType->getParamTypes()) {
1147 QualType newParamType = paramType.substObjCTypeArgs(
1150 ObjCSubstitutionContext::Parameter);
1151 if (newParamType.isNull())
1154 if (newParamType.getAsOpaquePtr() != paramType.getAsOpaquePtr())
1155 paramChanged = true;
1157 paramTypes.push_back(newParamType);
1160 // Transform extended info.
1161 FunctionProtoType::ExtProtoInfo info = funcProtoType->getExtProtoInfo();
1162 bool exceptionChanged = false;
1163 if (info.ExceptionSpec.Type == EST_Dynamic) {
1164 SmallVector<QualType, 4> exceptionTypes;
1165 for (auto exceptionType : info.ExceptionSpec.Exceptions) {
1166 QualType newExceptionType = exceptionType.substObjCTypeArgs(
1169 ObjCSubstitutionContext::Ordinary);
1170 if (newExceptionType.isNull())
1173 if (newExceptionType.getAsOpaquePtr()
1174 != exceptionType.getAsOpaquePtr())
1175 exceptionChanged = true;
1177 exceptionTypes.push_back(newExceptionType);
1180 if (exceptionChanged) {
1181 info.ExceptionSpec.Exceptions =
1182 llvm::makeArrayRef(exceptionTypes).copy(ctx);
1186 if (returnType.getAsOpaquePtr()
1187 == funcProtoType->getReturnType().getAsOpaquePtr() &&
1188 !paramChanged && !exceptionChanged)
1191 return ctx.getFunctionType(returnType, paramTypes, info);
1194 // Substitute into the type arguments of a specialized Objective-C object
1196 if (const auto *objcObjectType = dyn_cast<ObjCObjectType>(splitType.Ty)) {
1197 if (objcObjectType->isSpecializedAsWritten()) {
1198 SmallVector<QualType, 4> newTypeArgs;
1199 bool anyChanged = false;
1200 for (auto typeArg : objcObjectType->getTypeArgsAsWritten()) {
1201 QualType newTypeArg = typeArg.substObjCTypeArgs(
1203 ObjCSubstitutionContext::Ordinary);
1204 if (newTypeArg.isNull())
1207 if (newTypeArg.getAsOpaquePtr() != typeArg.getAsOpaquePtr()) {
1208 // If we're substituting based on an unspecialized context type,
1209 // produce an unspecialized type.
1210 ArrayRef<ObjCProtocolDecl *> protocols(
1211 objcObjectType->qual_begin(),
1212 objcObjectType->getNumProtocols());
1213 if (typeArgs.empty() &&
1214 context != ObjCSubstitutionContext::Superclass) {
1215 return ctx.getObjCObjectType(
1216 objcObjectType->getBaseType(), { },
1218 objcObjectType->isKindOfTypeAsWritten());
1224 newTypeArgs.push_back(newTypeArg);
1228 ArrayRef<ObjCProtocolDecl *> protocols(
1229 objcObjectType->qual_begin(),
1230 objcObjectType->getNumProtocols());
1231 return ctx.getObjCObjectType(objcObjectType->getBaseType(),
1232 newTypeArgs, protocols,
1233 objcObjectType->isKindOfTypeAsWritten());
1244 QualType QualType::substObjCMemberType(QualType objectType,
1245 const DeclContext *dc,
1246 ObjCSubstitutionContext context) const {
1247 if (auto subs = objectType->getObjCSubstitutions(dc))
1248 return substObjCTypeArgs(dc->getParentASTContext(), *subs, context);
1253 QualType QualType::stripObjCKindOfType(const ASTContext &constCtx) const {
1254 // FIXME: Because ASTContext::getAttributedType() is non-const.
1255 auto &ctx = const_cast<ASTContext &>(constCtx);
1256 return simpleTransform(ctx, *this,
1257 [&](QualType type) -> QualType {
1258 SplitQualType splitType = type.split();
1259 if (auto *objType = splitType.Ty->getAs<ObjCObjectType>()) {
1260 if (!objType->isKindOfType())
1264 = objType->getBaseType().stripObjCKindOfType(ctx);
1265 return ctx.getQualifiedType(
1266 ctx.getObjCObjectType(baseType,
1267 objType->getTypeArgsAsWritten(),
1268 objType->getProtocols(),
1269 /*isKindOf=*/false),
1277 QualType QualType::getAtomicUnqualifiedType() const {
1278 if (auto AT = getTypePtr()->getAs<AtomicType>())
1279 return AT->getValueType().getUnqualifiedType();
1280 return getUnqualifiedType();
1283 Optional<ArrayRef<QualType>> Type::getObjCSubstitutions(
1284 const DeclContext *dc) const {
1285 // Look through method scopes.
1286 if (auto method = dyn_cast<ObjCMethodDecl>(dc))
1287 dc = method->getDeclContext();
1289 // Find the class or category in which the type we're substituting
1291 const ObjCInterfaceDecl *dcClassDecl = dyn_cast<ObjCInterfaceDecl>(dc);
1292 const ObjCCategoryDecl *dcCategoryDecl = nullptr;
1293 ObjCTypeParamList *dcTypeParams = nullptr;
1295 // If the class does not have any type parameters, there's no
1296 // substitution to do.
1297 dcTypeParams = dcClassDecl->getTypeParamList();
1301 // If we are in neither a class nor a category, there's no
1302 // substitution to perform.
1303 dcCategoryDecl = dyn_cast<ObjCCategoryDecl>(dc);
1304 if (!dcCategoryDecl)
1307 // If the category does not have any type parameters, there's no
1308 // substitution to do.
1309 dcTypeParams = dcCategoryDecl->getTypeParamList();
1313 dcClassDecl = dcCategoryDecl->getClassInterface();
1317 assert(dcTypeParams && "No substitutions to perform");
1318 assert(dcClassDecl && "No class context");
1320 // Find the underlying object type.
1321 const ObjCObjectType *objectType;
1322 if (const auto *objectPointerType = getAs<ObjCObjectPointerType>()) {
1323 objectType = objectPointerType->getObjectType();
1324 } else if (getAs<BlockPointerType>()) {
1325 ASTContext &ctx = dc->getParentASTContext();
1326 objectType = ctx.getObjCObjectType(ctx.ObjCBuiltinIdTy, { }, { })
1327 ->castAs<ObjCObjectType>();;
1329 objectType = getAs<ObjCObjectType>();
1332 /// Extract the class from the receiver object type.
1333 ObjCInterfaceDecl *curClassDecl = objectType ? objectType->getInterface()
1335 if (!curClassDecl) {
1336 // If we don't have a context type (e.g., this is "id" or some
1337 // variant thereof), substitute the bounds.
1338 return llvm::ArrayRef<QualType>();
1341 // Follow the superclass chain until we've mapped the receiver type
1342 // to the same class as the context.
1343 while (curClassDecl != dcClassDecl) {
1344 // Map to the superclass type.
1345 QualType superType = objectType->getSuperClassType();
1346 if (superType.isNull()) {
1347 objectType = nullptr;
1351 objectType = superType->castAs<ObjCObjectType>();
1352 curClassDecl = objectType->getInterface();
1355 // If we don't have a receiver type, or the receiver type does not
1356 // have type arguments, substitute in the defaults.
1357 if (!objectType || objectType->isUnspecialized()) {
1358 return llvm::ArrayRef<QualType>();
1361 // The receiver type has the type arguments we want.
1362 return objectType->getTypeArgs();
1365 bool Type::acceptsObjCTypeParams() const {
1366 if (auto *IfaceT = getAsObjCInterfaceType()) {
1367 if (auto *ID = IfaceT->getInterface()) {
1368 if (ID->getTypeParamList())
1376 void ObjCObjectType::computeSuperClassTypeSlow() const {
1377 // Retrieve the class declaration for this type. If there isn't one
1378 // (e.g., this is some variant of "id" or "Class"), then there is no
1380 ObjCInterfaceDecl *classDecl = getInterface();
1382 CachedSuperClassType.setInt(true);
1386 // Extract the superclass type.
1387 const ObjCObjectType *superClassObjTy = classDecl->getSuperClassType();
1388 if (!superClassObjTy) {
1389 CachedSuperClassType.setInt(true);
1393 ObjCInterfaceDecl *superClassDecl = superClassObjTy->getInterface();
1394 if (!superClassDecl) {
1395 CachedSuperClassType.setInt(true);
1399 // If the superclass doesn't have type parameters, then there is no
1400 // substitution to perform.
1401 QualType superClassType(superClassObjTy, 0);
1402 ObjCTypeParamList *superClassTypeParams = superClassDecl->getTypeParamList();
1403 if (!superClassTypeParams) {
1404 CachedSuperClassType.setPointerAndInt(
1405 superClassType->castAs<ObjCObjectType>(), true);
1409 // If the superclass reference is unspecialized, return it.
1410 if (superClassObjTy->isUnspecialized()) {
1411 CachedSuperClassType.setPointerAndInt(superClassObjTy, true);
1415 // If the subclass is not parameterized, there aren't any type
1416 // parameters in the superclass reference to substitute.
1417 ObjCTypeParamList *typeParams = classDecl->getTypeParamList();
1419 CachedSuperClassType.setPointerAndInt(
1420 superClassType->castAs<ObjCObjectType>(), true);
1424 // If the subclass type isn't specialized, return the unspecialized
1426 if (isUnspecialized()) {
1427 QualType unspecializedSuper
1428 = classDecl->getASTContext().getObjCInterfaceType(
1429 superClassObjTy->getInterface());
1430 CachedSuperClassType.setPointerAndInt(
1431 unspecializedSuper->castAs<ObjCObjectType>(),
1436 // Substitute the provided type arguments into the superclass type.
1437 ArrayRef<QualType> typeArgs = getTypeArgs();
1438 assert(typeArgs.size() == typeParams->size());
1439 CachedSuperClassType.setPointerAndInt(
1440 superClassType.substObjCTypeArgs(classDecl->getASTContext(), typeArgs,
1441 ObjCSubstitutionContext::Superclass)
1442 ->castAs<ObjCObjectType>(),
1446 const ObjCInterfaceType *ObjCObjectPointerType::getInterfaceType() const {
1447 if (auto interfaceDecl = getObjectType()->getInterface()) {
1448 return interfaceDecl->getASTContext().getObjCInterfaceType(interfaceDecl)
1449 ->castAs<ObjCInterfaceType>();
1455 QualType ObjCObjectPointerType::getSuperClassType() const {
1456 QualType superObjectType = getObjectType()->getSuperClassType();
1457 if (superObjectType.isNull())
1458 return superObjectType;
1460 ASTContext &ctx = getInterfaceDecl()->getASTContext();
1461 return ctx.getObjCObjectPointerType(superObjectType);
1464 const ObjCObjectType *Type::getAsObjCQualifiedInterfaceType() const {
1465 // There is no sugar for ObjCObjectType's, just return the canonical
1466 // type pointer if it is the right class. There is no typedef information to
1467 // return and these cannot be Address-space qualified.
1468 if (const ObjCObjectType *T = getAs<ObjCObjectType>())
1469 if (T->getNumProtocols() && T->getInterface())
1474 bool Type::isObjCQualifiedInterfaceType() const {
1475 return getAsObjCQualifiedInterfaceType() != nullptr;
1478 const ObjCObjectPointerType *Type::getAsObjCQualifiedIdType() const {
1479 // There is no sugar for ObjCQualifiedIdType's, just return the canonical
1480 // type pointer if it is the right class.
1481 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) {
1482 if (OPT->isObjCQualifiedIdType())
1488 const ObjCObjectPointerType *Type::getAsObjCQualifiedClassType() const {
1489 // There is no sugar for ObjCQualifiedClassType's, just return the canonical
1490 // type pointer if it is the right class.
1491 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) {
1492 if (OPT->isObjCQualifiedClassType())
1498 const ObjCObjectType *Type::getAsObjCInterfaceType() const {
1499 if (const ObjCObjectType *OT = getAs<ObjCObjectType>()) {
1500 if (OT->getInterface())
1505 const ObjCObjectPointerType *Type::getAsObjCInterfacePointerType() const {
1506 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) {
1507 if (OPT->getInterfaceType())
1513 const CXXRecordDecl *Type::getPointeeCXXRecordDecl() const {
1514 QualType PointeeType;
1515 if (const PointerType *PT = getAs<PointerType>())
1516 PointeeType = PT->getPointeeType();
1517 else if (const ReferenceType *RT = getAs<ReferenceType>())
1518 PointeeType = RT->getPointeeType();
1522 if (const RecordType *RT = PointeeType->getAs<RecordType>())
1523 return dyn_cast<CXXRecordDecl>(RT->getDecl());
1528 CXXRecordDecl *Type::getAsCXXRecordDecl() const {
1529 return dyn_cast_or_null<CXXRecordDecl>(getAsTagDecl());
1532 TagDecl *Type::getAsTagDecl() const {
1533 if (const auto *TT = getAs<TagType>())
1534 return cast<TagDecl>(TT->getDecl());
1535 if (const auto *Injected = getAs<InjectedClassNameType>())
1536 return Injected->getDecl();
1542 class GetContainedAutoVisitor :
1543 public TypeVisitor<GetContainedAutoVisitor, AutoType*> {
1545 using TypeVisitor<GetContainedAutoVisitor, AutoType*>::Visit;
1546 AutoType *Visit(QualType T) {
1549 return Visit(T.getTypePtr());
1552 // The 'auto' type itself.
1553 AutoType *VisitAutoType(const AutoType *AT) {
1554 return const_cast<AutoType*>(AT);
1557 // Only these types can contain the desired 'auto' type.
1558 AutoType *VisitPointerType(const PointerType *T) {
1559 return Visit(T->getPointeeType());
1561 AutoType *VisitBlockPointerType(const BlockPointerType *T) {
1562 return Visit(T->getPointeeType());
1564 AutoType *VisitReferenceType(const ReferenceType *T) {
1565 return Visit(T->getPointeeTypeAsWritten());
1567 AutoType *VisitMemberPointerType(const MemberPointerType *T) {
1568 return Visit(T->getPointeeType());
1570 AutoType *VisitArrayType(const ArrayType *T) {
1571 return Visit(T->getElementType());
1573 AutoType *VisitDependentSizedExtVectorType(
1574 const DependentSizedExtVectorType *T) {
1575 return Visit(T->getElementType());
1577 AutoType *VisitVectorType(const VectorType *T) {
1578 return Visit(T->getElementType());
1580 AutoType *VisitFunctionType(const FunctionType *T) {
1581 return Visit(T->getReturnType());
1583 AutoType *VisitParenType(const ParenType *T) {
1584 return Visit(T->getInnerType());
1586 AutoType *VisitAttributedType(const AttributedType *T) {
1587 return Visit(T->getModifiedType());
1589 AutoType *VisitAdjustedType(const AdjustedType *T) {
1590 return Visit(T->getOriginalType());
1595 AutoType *Type::getContainedAutoType() const {
1596 return GetContainedAutoVisitor().Visit(this);
1599 bool Type::hasIntegerRepresentation() const {
1600 if (const VectorType *VT = dyn_cast<VectorType>(CanonicalType))
1601 return VT->getElementType()->isIntegerType();
1603 return isIntegerType();
1606 /// \brief Determine whether this type is an integral type.
1608 /// This routine determines whether the given type is an integral type per
1609 /// C++ [basic.fundamental]p7. Although the C standard does not define the
1610 /// term "integral type", it has a similar term "integer type", and in C++
1611 /// the two terms are equivalent. However, C's "integer type" includes
1612 /// enumeration types, while C++'s "integer type" does not. The \c ASTContext
1613 /// parameter is used to determine whether we should be following the C or
1614 /// C++ rules when determining whether this type is an integral/integer type.
1616 /// For cases where C permits "an integer type" and C++ permits "an integral
1617 /// type", use this routine.
1619 /// For cases where C permits "an integer type" and C++ permits "an integral
1620 /// or enumeration type", use \c isIntegralOrEnumerationType() instead.
1622 /// \param Ctx The context in which this type occurs.
1624 /// \returns true if the type is considered an integral type, false otherwise.
1625 bool Type::isIntegralType(const ASTContext &Ctx) const {
1626 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType))
1627 return BT->getKind() >= BuiltinType::Bool &&
1628 BT->getKind() <= BuiltinType::Int128;
1630 // Complete enum types are integral in C.
1631 if (!Ctx.getLangOpts().CPlusPlus)
1632 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType))
1633 return ET->getDecl()->isComplete();
1639 bool Type::isIntegralOrUnscopedEnumerationType() const {
1640 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType))
1641 return BT->getKind() >= BuiltinType::Bool &&
1642 BT->getKind() <= BuiltinType::Int128;
1644 // Check for a complete enum type; incomplete enum types are not properly an
1645 // enumeration type in the sense required here.
1646 // C++0x: However, if the underlying type of the enum is fixed, it is
1647 // considered complete.
1648 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType))
1649 return ET->getDecl()->isComplete() && !ET->getDecl()->isScoped();
1656 bool Type::isCharType() const {
1657 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType))
1658 return BT->getKind() == BuiltinType::Char_U ||
1659 BT->getKind() == BuiltinType::UChar ||
1660 BT->getKind() == BuiltinType::Char_S ||
1661 BT->getKind() == BuiltinType::SChar;
1665 bool Type::isWideCharType() const {
1666 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType))
1667 return BT->getKind() == BuiltinType::WChar_S ||
1668 BT->getKind() == BuiltinType::WChar_U;
1672 bool Type::isChar16Type() const {
1673 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType))
1674 return BT->getKind() == BuiltinType::Char16;
1678 bool Type::isChar32Type() const {
1679 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType))
1680 return BT->getKind() == BuiltinType::Char32;
1684 /// \brief Determine whether this type is any of the built-in character
1686 bool Type::isAnyCharacterType() const {
1687 const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType);
1688 if (!BT) return false;
1689 switch (BT->getKind()) {
1690 default: return false;
1691 case BuiltinType::Char_U:
1692 case BuiltinType::UChar:
1693 case BuiltinType::WChar_U:
1694 case BuiltinType::Char16:
1695 case BuiltinType::Char32:
1696 case BuiltinType::Char_S:
1697 case BuiltinType::SChar:
1698 case BuiltinType::WChar_S:
1703 /// isSignedIntegerType - Return true if this is an integer type that is
1704 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..],
1705 /// an enum decl which has a signed representation
1706 bool Type::isSignedIntegerType() const {
1707 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) {
1708 return BT->getKind() >= BuiltinType::Char_S &&
1709 BT->getKind() <= BuiltinType::Int128;
1712 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) {
1713 // Incomplete enum types are not treated as integer types.
1714 // FIXME: In C++, enum types are never integer types.
1715 if (ET->getDecl()->isComplete() && !ET->getDecl()->isScoped())
1716 return ET->getDecl()->getIntegerType()->isSignedIntegerType();
1722 bool Type::isSignedIntegerOrEnumerationType() const {
1723 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) {
1724 return BT->getKind() >= BuiltinType::Char_S &&
1725 BT->getKind() <= BuiltinType::Int128;
1728 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) {
1729 if (ET->getDecl()->isComplete())
1730 return ET->getDecl()->getIntegerType()->isSignedIntegerType();
1736 bool Type::hasSignedIntegerRepresentation() const {
1737 if (const VectorType *VT = dyn_cast<VectorType>(CanonicalType))
1738 return VT->getElementType()->isSignedIntegerOrEnumerationType();
1740 return isSignedIntegerOrEnumerationType();
1743 /// isUnsignedIntegerType - Return true if this is an integer type that is
1744 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum
1745 /// decl which has an unsigned representation
1746 bool Type::isUnsignedIntegerType() const {
1747 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) {
1748 return BT->getKind() >= BuiltinType::Bool &&
1749 BT->getKind() <= BuiltinType::UInt128;
1752 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) {
1753 // Incomplete enum types are not treated as integer types.
1754 // FIXME: In C++, enum types are never integer types.
1755 if (ET->getDecl()->isComplete() && !ET->getDecl()->isScoped())
1756 return ET->getDecl()->getIntegerType()->isUnsignedIntegerType();
1762 bool Type::isUnsignedIntegerOrEnumerationType() const {
1763 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) {
1764 return BT->getKind() >= BuiltinType::Bool &&
1765 BT->getKind() <= BuiltinType::UInt128;
1768 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) {
1769 if (ET->getDecl()->isComplete())
1770 return ET->getDecl()->getIntegerType()->isUnsignedIntegerType();
1776 bool Type::hasUnsignedIntegerRepresentation() const {
1777 if (const VectorType *VT = dyn_cast<VectorType>(CanonicalType))
1778 return VT->getElementType()->isUnsignedIntegerOrEnumerationType();
1780 return isUnsignedIntegerOrEnumerationType();
1783 bool Type::isFloatingType() const {
1784 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType))
1785 return BT->getKind() >= BuiltinType::Half &&
1786 BT->getKind() <= BuiltinType::Float128;
1787 if (const ComplexType *CT = dyn_cast<ComplexType>(CanonicalType))
1788 return CT->getElementType()->isFloatingType();
1792 bool Type::hasFloatingRepresentation() const {
1793 if (const VectorType *VT = dyn_cast<VectorType>(CanonicalType))
1794 return VT->getElementType()->isFloatingType();
1796 return isFloatingType();
1799 bool Type::isRealFloatingType() const {
1800 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType))
1801 return BT->isFloatingPoint();
1805 bool Type::isRealType() const {
1806 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType))
1807 return BT->getKind() >= BuiltinType::Bool &&
1808 BT->getKind() <= BuiltinType::Float128;
1809 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType))
1810 return ET->getDecl()->isComplete() && !ET->getDecl()->isScoped();
1814 bool Type::isArithmeticType() const {
1815 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType))
1816 return BT->getKind() >= BuiltinType::Bool &&
1817 BT->getKind() <= BuiltinType::Float128;
1818 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType))
1819 // GCC allows forward declaration of enum types (forbid by C99 6.7.2.3p2).
1820 // If a body isn't seen by the time we get here, return false.
1822 // C++0x: Enumerations are not arithmetic types. For now, just return
1823 // false for scoped enumerations since that will disable any
1824 // unwanted implicit conversions.
1825 return !ET->getDecl()->isScoped() && ET->getDecl()->isComplete();
1826 return isa<ComplexType>(CanonicalType);
1829 Type::ScalarTypeKind Type::getScalarTypeKind() const {
1830 assert(isScalarType());
1832 const Type *T = CanonicalType.getTypePtr();
1833 if (const BuiltinType *BT = dyn_cast<BuiltinType>(T)) {
1834 if (BT->getKind() == BuiltinType::Bool) return STK_Bool;
1835 if (BT->getKind() == BuiltinType::NullPtr) return STK_CPointer;
1836 if (BT->isInteger()) return STK_Integral;
1837 if (BT->isFloatingPoint()) return STK_Floating;
1838 llvm_unreachable("unknown scalar builtin type");
1839 } else if (isa<PointerType>(T)) {
1840 return STK_CPointer;
1841 } else if (isa<BlockPointerType>(T)) {
1842 return STK_BlockPointer;
1843 } else if (isa<ObjCObjectPointerType>(T)) {
1844 return STK_ObjCObjectPointer;
1845 } else if (isa<MemberPointerType>(T)) {
1846 return STK_MemberPointer;
1847 } else if (isa<EnumType>(T)) {
1848 assert(cast<EnumType>(T)->getDecl()->isComplete());
1849 return STK_Integral;
1850 } else if (const ComplexType *CT = dyn_cast<ComplexType>(T)) {
1851 if (CT->getElementType()->isRealFloatingType())
1852 return STK_FloatingComplex;
1853 return STK_IntegralComplex;
1856 llvm_unreachable("unknown scalar type");
1859 /// \brief Determines whether the type is a C++ aggregate type or C
1860 /// aggregate or union type.
1862 /// An aggregate type is an array or a class type (struct, union, or
1863 /// class) that has no user-declared constructors, no private or
1864 /// protected non-static data members, no base classes, and no virtual
1865 /// functions (C++ [dcl.init.aggr]p1). The notion of an aggregate type
1866 /// subsumes the notion of C aggregates (C99 6.2.5p21) because it also
1867 /// includes union types.
1868 bool Type::isAggregateType() const {
1869 if (const RecordType *Record = dyn_cast<RecordType>(CanonicalType)) {
1870 if (CXXRecordDecl *ClassDecl = dyn_cast<CXXRecordDecl>(Record->getDecl()))
1871 return ClassDecl->isAggregate();
1876 return isa<ArrayType>(CanonicalType);
1879 /// isConstantSizeType - Return true if this is not a variable sized type,
1880 /// according to the rules of C99 6.7.5p3. It is not legal to call this on
1881 /// incomplete types or dependent types.
1882 bool Type::isConstantSizeType() const {
1883 assert(!isIncompleteType() && "This doesn't make sense for incomplete types");
1884 assert(!isDependentType() && "This doesn't make sense for dependent types");
1885 // The VAT must have a size, as it is known to be complete.
1886 return !isa<VariableArrayType>(CanonicalType);
1889 /// isIncompleteType - Return true if this is an incomplete type (C99 6.2.5p1)
1890 /// - a type that can describe objects, but which lacks information needed to
1891 /// determine its size.
1892 bool Type::isIncompleteType(NamedDecl **Def) const {
1896 switch (CanonicalType->getTypeClass()) {
1897 default: return false;
1899 // Void is the only incomplete builtin type. Per C99 6.2.5p19, it can never
1901 return isVoidType();
1903 EnumDecl *EnumD = cast<EnumType>(CanonicalType)->getDecl();
1907 // An enumeration with fixed underlying type is complete (C++0x 7.2p3).
1908 if (EnumD->isFixed())
1911 return !EnumD->isCompleteDefinition();
1914 // A tagged type (struct/union/enum/class) is incomplete if the decl is a
1915 // forward declaration, but not a full definition (C99 6.2.5p22).
1916 RecordDecl *Rec = cast<RecordType>(CanonicalType)->getDecl();
1919 return !Rec->isCompleteDefinition();
1922 // An array is incomplete if its element type is incomplete
1923 // (C++ [dcl.array]p1).
1924 // We don't handle variable arrays (they're not allowed in C++) or
1925 // dependent-sized arrays (dependent types are never treated as incomplete).
1926 return cast<ArrayType>(CanonicalType)->getElementType()
1927 ->isIncompleteType(Def);
1928 case IncompleteArray:
1929 // An array of unknown size is an incomplete type (C99 6.2.5p22).
1931 case MemberPointer: {
1932 // Member pointers in the MS ABI have special behavior in
1933 // RequireCompleteType: they attach a MSInheritanceAttr to the CXXRecordDecl
1934 // to indicate which inheritance model to use.
1935 auto *MPTy = cast<MemberPointerType>(CanonicalType);
1936 const Type *ClassTy = MPTy->getClass();
1937 // Member pointers with dependent class types don't get special treatment.
1938 if (ClassTy->isDependentType())
1940 const CXXRecordDecl *RD = ClassTy->getAsCXXRecordDecl();
1941 ASTContext &Context = RD->getASTContext();
1942 // Member pointers not in the MS ABI don't get special treatment.
1943 if (!Context.getTargetInfo().getCXXABI().isMicrosoft())
1945 // The inheritance attribute might only be present on the most recent
1946 // CXXRecordDecl, use that one.
1947 RD = RD->getMostRecentDecl();
1948 // Nothing interesting to do if the inheritance attribute is already set.
1949 if (RD->hasAttr<MSInheritanceAttr>())
1954 return cast<ObjCObjectType>(CanonicalType)->getBaseType()
1955 ->isIncompleteType(Def);
1956 case ObjCInterface: {
1957 // ObjC interfaces are incomplete if they are @class, not @interface.
1958 ObjCInterfaceDecl *Interface
1959 = cast<ObjCInterfaceType>(CanonicalType)->getDecl();
1962 return !Interface->hasDefinition();
1967 bool QualType::isPODType(const ASTContext &Context) const {
1968 // C++11 has a more relaxed definition of POD.
1969 if (Context.getLangOpts().CPlusPlus11)
1970 return isCXX11PODType(Context);
1972 return isCXX98PODType(Context);
1975 bool QualType::isCXX98PODType(const ASTContext &Context) const {
1976 // The compiler shouldn't query this for incomplete types, but the user might.
1977 // We return false for that case. Except for incomplete arrays of PODs, which
1978 // are PODs according to the standard.
1982 if ((*this)->isIncompleteArrayType())
1983 return Context.getBaseElementType(*this).isCXX98PODType(Context);
1985 if ((*this)->isIncompleteType())
1988 if (Context.getLangOpts().ObjCAutoRefCount) {
1989 switch (getObjCLifetime()) {
1990 case Qualifiers::OCL_ExplicitNone:
1993 case Qualifiers::OCL_Strong:
1994 case Qualifiers::OCL_Weak:
1995 case Qualifiers::OCL_Autoreleasing:
1998 case Qualifiers::OCL_None:
2003 QualType CanonicalType = getTypePtr()->CanonicalType;
2004 switch (CanonicalType->getTypeClass()) {
2005 // Everything not explicitly mentioned is not POD.
2006 default: return false;
2007 case Type::VariableArray:
2008 case Type::ConstantArray:
2009 // IncompleteArray is handled above.
2010 return Context.getBaseElementType(*this).isCXX98PODType(Context);
2012 case Type::ObjCObjectPointer:
2013 case Type::BlockPointer:
2017 case Type::MemberPointer:
2019 case Type::ExtVector:
2026 if (CXXRecordDecl *ClassDecl
2027 = dyn_cast<CXXRecordDecl>(cast<RecordType>(CanonicalType)->getDecl()))
2028 return ClassDecl->isPOD();
2030 // C struct/union is POD.
2035 bool QualType::isTrivialType(const ASTContext &Context) const {
2036 // The compiler shouldn't query this for incomplete types, but the user might.
2037 // We return false for that case. Except for incomplete arrays of PODs, which
2038 // are PODs according to the standard.
2042 if ((*this)->isArrayType())
2043 return Context.getBaseElementType(*this).isTrivialType(Context);
2045 // Return false for incomplete types after skipping any incomplete array
2046 // types which are expressly allowed by the standard and thus our API.
2047 if ((*this)->isIncompleteType())
2050 if (Context.getLangOpts().ObjCAutoRefCount) {
2051 switch (getObjCLifetime()) {
2052 case Qualifiers::OCL_ExplicitNone:
2055 case Qualifiers::OCL_Strong:
2056 case Qualifiers::OCL_Weak:
2057 case Qualifiers::OCL_Autoreleasing:
2060 case Qualifiers::OCL_None:
2061 if ((*this)->isObjCLifetimeType())
2067 QualType CanonicalType = getTypePtr()->CanonicalType;
2068 if (CanonicalType->isDependentType())
2071 // C++0x [basic.types]p9:
2072 // Scalar types, trivial class types, arrays of such types, and
2073 // cv-qualified versions of these types are collectively called trivial
2076 // As an extension, Clang treats vector types as Scalar types.
2077 if (CanonicalType->isScalarType() || CanonicalType->isVectorType())
2079 if (const RecordType *RT = CanonicalType->getAs<RecordType>()) {
2080 if (const CXXRecordDecl *ClassDecl =
2081 dyn_cast<CXXRecordDecl>(RT->getDecl())) {
2083 // A trivial class is a class that has a default constructor,
2084 // has no non-trivial default constructors, and is trivially
2086 return ClassDecl->hasDefaultConstructor() &&
2087 !ClassDecl->hasNonTrivialDefaultConstructor() &&
2088 ClassDecl->isTriviallyCopyable();
2094 // No other types can match.
2098 bool QualType::isTriviallyCopyableType(const ASTContext &Context) const {
2099 if ((*this)->isArrayType())
2100 return Context.getBaseElementType(*this).isTriviallyCopyableType(Context);
2102 if (Context.getLangOpts().ObjCAutoRefCount) {
2103 switch (getObjCLifetime()) {
2104 case Qualifiers::OCL_ExplicitNone:
2107 case Qualifiers::OCL_Strong:
2108 case Qualifiers::OCL_Weak:
2109 case Qualifiers::OCL_Autoreleasing:
2112 case Qualifiers::OCL_None:
2113 if ((*this)->isObjCLifetimeType())
2119 // C++11 [basic.types]p9
2120 // Scalar types, trivially copyable class types, arrays of such types, and
2121 // non-volatile const-qualified versions of these types are collectively
2122 // called trivially copyable types.
2124 QualType CanonicalType = getCanonicalType();
2125 if (CanonicalType->isDependentType())
2128 if (CanonicalType.isVolatileQualified())
2131 // Return false for incomplete types after skipping any incomplete array types
2132 // which are expressly allowed by the standard and thus our API.
2133 if (CanonicalType->isIncompleteType())
2136 // As an extension, Clang treats vector types as Scalar types.
2137 if (CanonicalType->isScalarType() || CanonicalType->isVectorType())
2140 if (const RecordType *RT = CanonicalType->getAs<RecordType>()) {
2141 if (const CXXRecordDecl *ClassDecl =
2142 dyn_cast<CXXRecordDecl>(RT->getDecl())) {
2143 if (!ClassDecl->isTriviallyCopyable()) return false;
2149 // No other types can match.
2155 bool Type::isLiteralType(const ASTContext &Ctx) const {
2156 if (isDependentType())
2159 // C++1y [basic.types]p10:
2160 // A type is a literal type if it is:
2162 if (Ctx.getLangOpts().CPlusPlus14 && isVoidType())
2165 // C++11 [basic.types]p10:
2166 // A type is a literal type if it is:
2168 // -- an array of literal type other than an array of runtime bound; or
2169 if (isVariableArrayType())
2171 const Type *BaseTy = getBaseElementTypeUnsafe();
2172 assert(BaseTy && "NULL element type");
2174 // Return false for incomplete types after skipping any incomplete array
2175 // types; those are expressly allowed by the standard and thus our API.
2176 if (BaseTy->isIncompleteType())
2179 // C++11 [basic.types]p10:
2180 // A type is a literal type if it is:
2181 // -- a scalar type; or
2182 // As an extension, Clang treats vector types and complex types as
2184 if (BaseTy->isScalarType() || BaseTy->isVectorType() ||
2185 BaseTy->isAnyComplexType())
2187 // -- a reference type; or
2188 if (BaseTy->isReferenceType())
2190 // -- a class type that has all of the following properties:
2191 if (const RecordType *RT = BaseTy->getAs<RecordType>()) {
2192 // -- a trivial destructor,
2193 // -- every constructor call and full-expression in the
2194 // brace-or-equal-initializers for non-static data members (if any)
2195 // is a constant expression,
2196 // -- it is an aggregate type or has at least one constexpr
2197 // constructor or constructor template that is not a copy or move
2199 // -- all non-static data members and base classes of literal types
2201 // We resolve DR1361 by ignoring the second bullet.
2202 if (const CXXRecordDecl *ClassDecl =
2203 dyn_cast<CXXRecordDecl>(RT->getDecl()))
2204 return ClassDecl->isLiteral();
2209 // We treat _Atomic T as a literal type if T is a literal type.
2210 if (const AtomicType *AT = BaseTy->getAs<AtomicType>())
2211 return AT->getValueType()->isLiteralType(Ctx);
2213 // If this type hasn't been deduced yet, then conservatively assume that
2214 // it'll work out to be a literal type.
2215 if (isa<AutoType>(BaseTy->getCanonicalTypeInternal()))
2221 bool Type::isStandardLayoutType() const {
2222 if (isDependentType())
2225 // C++0x [basic.types]p9:
2226 // Scalar types, standard-layout class types, arrays of such types, and
2227 // cv-qualified versions of these types are collectively called
2228 // standard-layout types.
2229 const Type *BaseTy = getBaseElementTypeUnsafe();
2230 assert(BaseTy && "NULL element type");
2232 // Return false for incomplete types after skipping any incomplete array
2233 // types which are expressly allowed by the standard and thus our API.
2234 if (BaseTy->isIncompleteType())
2237 // As an extension, Clang treats vector types as Scalar types.
2238 if (BaseTy->isScalarType() || BaseTy->isVectorType()) return true;
2239 if (const RecordType *RT = BaseTy->getAs<RecordType>()) {
2240 if (const CXXRecordDecl *ClassDecl =
2241 dyn_cast<CXXRecordDecl>(RT->getDecl()))
2242 if (!ClassDecl->isStandardLayout())
2245 // Default to 'true' for non-C++ class types.
2246 // FIXME: This is a bit dubious, but plain C structs should trivially meet
2247 // all the requirements of standard layout classes.
2251 // No other types can match.
2255 // This is effectively the intersection of isTrivialType and
2256 // isStandardLayoutType. We implement it directly to avoid redundant
2257 // conversions from a type to a CXXRecordDecl.
2258 bool QualType::isCXX11PODType(const ASTContext &Context) const {
2259 const Type *ty = getTypePtr();
2260 if (ty->isDependentType())
2263 if (Context.getLangOpts().ObjCAutoRefCount) {
2264 switch (getObjCLifetime()) {
2265 case Qualifiers::OCL_ExplicitNone:
2268 case Qualifiers::OCL_Strong:
2269 case Qualifiers::OCL_Weak:
2270 case Qualifiers::OCL_Autoreleasing:
2273 case Qualifiers::OCL_None:
2278 // C++11 [basic.types]p9:
2279 // Scalar types, POD classes, arrays of such types, and cv-qualified
2280 // versions of these types are collectively called trivial types.
2281 const Type *BaseTy = ty->getBaseElementTypeUnsafe();
2282 assert(BaseTy && "NULL element type");
2284 // Return false for incomplete types after skipping any incomplete array
2285 // types which are expressly allowed by the standard and thus our API.
2286 if (BaseTy->isIncompleteType())
2289 // As an extension, Clang treats vector types as Scalar types.
2290 if (BaseTy->isScalarType() || BaseTy->isVectorType()) return true;
2291 if (const RecordType *RT = BaseTy->getAs<RecordType>()) {
2292 if (const CXXRecordDecl *ClassDecl =
2293 dyn_cast<CXXRecordDecl>(RT->getDecl())) {
2294 // C++11 [class]p10:
2295 // A POD struct is a non-union class that is both a trivial class [...]
2296 if (!ClassDecl->isTrivial()) return false;
2298 // C++11 [class]p10:
2299 // A POD struct is a non-union class that is both a trivial class and
2300 // a standard-layout class [...]
2301 if (!ClassDecl->isStandardLayout()) return false;
2303 // C++11 [class]p10:
2304 // A POD struct is a non-union class that is both a trivial class and
2305 // a standard-layout class, and has no non-static data members of type
2306 // non-POD struct, non-POD union (or array of such types). [...]
2308 // We don't directly query the recursive aspect as the requirements for
2309 // both standard-layout classes and trivial classes apply recursively
2316 // No other types can match.
2320 bool Type::isPromotableIntegerType() const {
2321 if (const BuiltinType *BT = getAs<BuiltinType>())
2322 switch (BT->getKind()) {
2323 case BuiltinType::Bool:
2324 case BuiltinType::Char_S:
2325 case BuiltinType::Char_U:
2326 case BuiltinType::SChar:
2327 case BuiltinType::UChar:
2328 case BuiltinType::Short:
2329 case BuiltinType::UShort:
2330 case BuiltinType::WChar_S:
2331 case BuiltinType::WChar_U:
2332 case BuiltinType::Char16:
2333 case BuiltinType::Char32:
2339 // Enumerated types are promotable to their compatible integer types
2340 // (C99 6.3.1.1) a.k.a. its underlying type (C++ [conv.prom]p2).
2341 if (const EnumType *ET = getAs<EnumType>()){
2342 if (this->isDependentType() || ET->getDecl()->getPromotionType().isNull()
2343 || ET->getDecl()->isScoped())
2352 bool Type::isSpecifierType() const {
2353 // Note that this intentionally does not use the canonical type.
2354 switch (getTypeClass()) {
2362 case TemplateTypeParm:
2363 case SubstTemplateTypeParm:
2364 case TemplateSpecialization:
2367 case DependentTemplateSpecialization:
2370 case ObjCObjectPointer: // FIXME: object pointers aren't really specifiers
2377 ElaboratedTypeKeyword
2378 TypeWithKeyword::getKeywordForTypeSpec(unsigned TypeSpec) {
2380 default: return ETK_None;
2381 case TST_typename: return ETK_Typename;
2382 case TST_class: return ETK_Class;
2383 case TST_struct: return ETK_Struct;
2384 case TST_interface: return ETK_Interface;
2385 case TST_union: return ETK_Union;
2386 case TST_enum: return ETK_Enum;
2391 TypeWithKeyword::getTagTypeKindForTypeSpec(unsigned TypeSpec) {
2393 case TST_class: return TTK_Class;
2394 case TST_struct: return TTK_Struct;
2395 case TST_interface: return TTK_Interface;
2396 case TST_union: return TTK_Union;
2397 case TST_enum: return TTK_Enum;
2400 llvm_unreachable("Type specifier is not a tag type kind.");
2403 ElaboratedTypeKeyword
2404 TypeWithKeyword::getKeywordForTagTypeKind(TagTypeKind Kind) {
2406 case TTK_Class: return ETK_Class;
2407 case TTK_Struct: return ETK_Struct;
2408 case TTK_Interface: return ETK_Interface;
2409 case TTK_Union: return ETK_Union;
2410 case TTK_Enum: return ETK_Enum;
2412 llvm_unreachable("Unknown tag type kind.");
2416 TypeWithKeyword::getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword) {
2418 case ETK_Class: return TTK_Class;
2419 case ETK_Struct: return TTK_Struct;
2420 case ETK_Interface: return TTK_Interface;
2421 case ETK_Union: return TTK_Union;
2422 case ETK_Enum: return TTK_Enum;
2423 case ETK_None: // Fall through.
2425 llvm_unreachable("Elaborated type keyword is not a tag type kind.");
2427 llvm_unreachable("Unknown elaborated type keyword.");
2431 TypeWithKeyword::KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword) {
2443 llvm_unreachable("Unknown elaborated type keyword.");
2446 StringRef TypeWithKeyword::getKeywordName(ElaboratedTypeKeyword Keyword) {
2448 case ETK_None: return "";
2449 case ETK_Typename: return "typename";
2450 case ETK_Class: return "class";
2451 case ETK_Struct: return "struct";
2452 case ETK_Interface: return "__interface";
2453 case ETK_Union: return "union";
2454 case ETK_Enum: return "enum";
2457 llvm_unreachable("Unknown elaborated type keyword.");
2460 DependentTemplateSpecializationType::DependentTemplateSpecializationType(
2461 ElaboratedTypeKeyword Keyword,
2462 NestedNameSpecifier *NNS, const IdentifierInfo *Name,
2463 ArrayRef<TemplateArgument> Args,
2465 : TypeWithKeyword(Keyword, DependentTemplateSpecialization, Canon, true, true,
2466 /*VariablyModified=*/false,
2467 NNS && NNS->containsUnexpandedParameterPack()),
2468 NNS(NNS), Name(Name), NumArgs(Args.size()) {
2469 assert((!NNS || NNS->isDependent()) &&
2470 "DependentTemplateSpecializatonType requires dependent qualifier");
2471 TemplateArgument *ArgBuffer = getArgBuffer();
2472 for (const TemplateArgument &Arg : Args) {
2473 if (Arg.containsUnexpandedParameterPack())
2474 setContainsUnexpandedParameterPack();
2476 new (ArgBuffer++) TemplateArgument(Arg);
2481 DependentTemplateSpecializationType::Profile(llvm::FoldingSetNodeID &ID,
2482 const ASTContext &Context,
2483 ElaboratedTypeKeyword Keyword,
2484 NestedNameSpecifier *Qualifier,
2485 const IdentifierInfo *Name,
2486 ArrayRef<TemplateArgument> Args) {
2487 ID.AddInteger(Keyword);
2488 ID.AddPointer(Qualifier);
2489 ID.AddPointer(Name);
2490 for (const TemplateArgument &Arg : Args)
2491 Arg.Profile(ID, Context);
2494 bool Type::isElaboratedTypeSpecifier() const {
2495 ElaboratedTypeKeyword Keyword;
2496 if (const ElaboratedType *Elab = dyn_cast<ElaboratedType>(this))
2497 Keyword = Elab->getKeyword();
2498 else if (const DependentNameType *DepName = dyn_cast<DependentNameType>(this))
2499 Keyword = DepName->getKeyword();
2500 else if (const DependentTemplateSpecializationType *DepTST =
2501 dyn_cast<DependentTemplateSpecializationType>(this))
2502 Keyword = DepTST->getKeyword();
2506 return TypeWithKeyword::KeywordIsTagTypeKind(Keyword);
2509 const char *Type::getTypeClassName() const {
2510 switch (TypeBits.TC) {
2511 #define ABSTRACT_TYPE(Derived, Base)
2512 #define TYPE(Derived, Base) case Derived: return #Derived;
2513 #include "clang/AST/TypeNodes.def"
2516 llvm_unreachable("Invalid type class.");
2519 StringRef BuiltinType::getName(const PrintingPolicy &Policy) const {
2520 switch (getKind()) {
2524 return Policy.Bool ? "bool" : "_Bool";
2530 return "signed char";
2542 return "unsigned char";
2544 return "unsigned short";
2546 return "unsigned int";
2548 return "unsigned long";
2550 return "unsigned long long";
2552 return "unsigned __int128";
2554 return Policy.Half ? "half" : "__fp16";
2560 return "long double";
2562 return "__float128";
2565 return Policy.MSWChar ? "__wchar_t" : "wchar_t";
2573 return "<overloaded function type>";
2575 return "<bound member function type>";
2577 return "<pseudo-object type>";
2579 return "<dependent type>";
2581 return "<unknown type>";
2582 case ARCUnbridgedCast:
2583 return "<ARC unbridged cast type>";
2585 return "<builtin fn type>";
2592 #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
2594 return "__" #Access " " #ImgType "_t";
2595 #include "clang/Basic/OpenCLImageTypes.def"
2601 return "clk_event_t";
2607 return "reserve_id_t";
2608 case OMPArraySection:
2609 return "<OpenMP array section type>";
2612 llvm_unreachable("Invalid builtin type.");
2615 QualType QualType::getNonLValueExprType(const ASTContext &Context) const {
2616 if (const ReferenceType *RefType = getTypePtr()->getAs<ReferenceType>())
2617 return RefType->getPointeeType();
2619 // C++0x [basic.lval]:
2620 // Class prvalues can have cv-qualified types; non-class prvalues always
2621 // have cv-unqualified types.
2623 // See also C99 6.3.2.1p2.
2624 if (!Context.getLangOpts().CPlusPlus ||
2625 (!getTypePtr()->isDependentType() && !getTypePtr()->isRecordType()))
2626 return getUnqualifiedType();
2631 StringRef FunctionType::getNameForCallConv(CallingConv CC) {
2633 case CC_C: return "cdecl";
2634 case CC_X86StdCall: return "stdcall";
2635 case CC_X86FastCall: return "fastcall";
2636 case CC_X86ThisCall: return "thiscall";
2637 case CC_X86Pascal: return "pascal";
2638 case CC_X86VectorCall: return "vectorcall";
2639 case CC_X86_64Win64: return "ms_abi";
2640 case CC_X86_64SysV: return "sysv_abi";
2641 case CC_AAPCS: return "aapcs";
2642 case CC_AAPCS_VFP: return "aapcs-vfp";
2643 case CC_IntelOclBicc: return "intel_ocl_bicc";
2644 case CC_SpirFunction: return "spir_function";
2645 case CC_OpenCLKernel: return "opencl_kernel";
2646 case CC_Swift: return "swiftcall";
2647 case CC_PreserveMost: return "preserve_most";
2648 case CC_PreserveAll: return "preserve_all";
2651 llvm_unreachable("Invalid calling convention.");
2654 FunctionProtoType::FunctionProtoType(QualType result, ArrayRef<QualType> params,
2656 const ExtProtoInfo &epi)
2657 : FunctionType(FunctionProto, result, canonical,
2658 result->isDependentType(),
2659 result->isInstantiationDependentType(),
2660 result->isVariablyModifiedType(),
2661 result->containsUnexpandedParameterPack(), epi.ExtInfo),
2662 NumParams(params.size()),
2663 NumExceptions(epi.ExceptionSpec.Exceptions.size()),
2664 ExceptionSpecType(epi.ExceptionSpec.Type),
2665 HasExtParameterInfos(epi.ExtParameterInfos != nullptr),
2666 Variadic(epi.Variadic), HasTrailingReturn(epi.HasTrailingReturn) {
2667 assert(NumParams == params.size() && "function has too many parameters");
2669 FunctionTypeBits.TypeQuals = epi.TypeQuals;
2670 FunctionTypeBits.RefQualifier = epi.RefQualifier;
2672 // Fill in the trailing argument array.
2673 QualType *argSlot = reinterpret_cast<QualType*>(this+1);
2674 for (unsigned i = 0; i != NumParams; ++i) {
2675 if (params[i]->isDependentType())
2677 else if (params[i]->isInstantiationDependentType())
2678 setInstantiationDependent();
2680 if (params[i]->containsUnexpandedParameterPack())
2681 setContainsUnexpandedParameterPack();
2683 argSlot[i] = params[i];
2686 if (getExceptionSpecType() == EST_Dynamic) {
2687 // Fill in the exception array.
2688 QualType *exnSlot = argSlot + NumParams;
2690 for (QualType ExceptionType : epi.ExceptionSpec.Exceptions) {
2691 // Note that a dependent exception specification does *not* make
2692 // a type dependent; it's not even part of the C++ type system.
2693 if (ExceptionType->isInstantiationDependentType())
2694 setInstantiationDependent();
2696 if (ExceptionType->containsUnexpandedParameterPack())
2697 setContainsUnexpandedParameterPack();
2699 exnSlot[I++] = ExceptionType;
2701 } else if (getExceptionSpecType() == EST_ComputedNoexcept) {
2702 // Store the noexcept expression and context.
2703 Expr **noexSlot = reinterpret_cast<Expr **>(argSlot + NumParams);
2704 *noexSlot = epi.ExceptionSpec.NoexceptExpr;
2706 if (epi.ExceptionSpec.NoexceptExpr) {
2707 if (epi.ExceptionSpec.NoexceptExpr->isValueDependent() ||
2708 epi.ExceptionSpec.NoexceptExpr->isInstantiationDependent())
2709 setInstantiationDependent();
2711 if (epi.ExceptionSpec.NoexceptExpr->containsUnexpandedParameterPack())
2712 setContainsUnexpandedParameterPack();
2714 } else if (getExceptionSpecType() == EST_Uninstantiated) {
2715 // Store the function decl from which we will resolve our
2716 // exception specification.
2717 FunctionDecl **slot =
2718 reinterpret_cast<FunctionDecl **>(argSlot + NumParams);
2719 slot[0] = epi.ExceptionSpec.SourceDecl;
2720 slot[1] = epi.ExceptionSpec.SourceTemplate;
2721 // This exception specification doesn't make the type dependent, because
2722 // it's not instantiated as part of instantiating the type.
2723 } else if (getExceptionSpecType() == EST_Unevaluated) {
2724 // Store the function decl from which we will resolve our
2725 // exception specification.
2726 FunctionDecl **slot =
2727 reinterpret_cast<FunctionDecl **>(argSlot + NumParams);
2728 slot[0] = epi.ExceptionSpec.SourceDecl;
2731 if (epi.ExtParameterInfos) {
2732 ExtParameterInfo *extParamInfos =
2733 const_cast<ExtParameterInfo *>(getExtParameterInfosBuffer());
2734 for (unsigned i = 0; i != NumParams; ++i)
2735 extParamInfos[i] = epi.ExtParameterInfos[i];
2739 bool FunctionProtoType::hasDependentExceptionSpec() const {
2740 if (Expr *NE = getNoexceptExpr())
2741 return NE->isValueDependent();
2742 for (QualType ET : exceptions())
2743 // A pack expansion with a non-dependent pattern is still dependent,
2744 // because we don't know whether the pattern is in the exception spec
2745 // or not (that depends on whether the pack has 0 expansions).
2746 if (ET->isDependentType() || ET->getAs<PackExpansionType>())
2751 FunctionProtoType::NoexceptResult
2752 FunctionProtoType::getNoexceptSpec(const ASTContext &ctx) const {
2753 ExceptionSpecificationType est = getExceptionSpecType();
2754 if (est == EST_BasicNoexcept)
2757 if (est != EST_ComputedNoexcept)
2758 return NR_NoNoexcept;
2760 Expr *noexceptExpr = getNoexceptExpr();
2762 return NR_BadNoexcept;
2763 if (noexceptExpr->isValueDependent())
2764 return NR_Dependent;
2767 bool isICE = noexceptExpr->isIntegerConstantExpr(value, ctx, nullptr,
2768 /*evaluated*/false);
2770 assert(isICE && "AST should not contain bad noexcept expressions.");
2772 return value.getBoolValue() ? NR_Nothrow : NR_Throw;
2775 bool FunctionProtoType::isNothrow(const ASTContext &Ctx,
2776 bool ResultIfDependent) const {
2777 ExceptionSpecificationType EST = getExceptionSpecType();
2778 assert(EST != EST_Unevaluated && EST != EST_Uninstantiated);
2779 if (EST == EST_DynamicNone || EST == EST_BasicNoexcept)
2782 if (EST == EST_Dynamic && ResultIfDependent) {
2783 // A dynamic exception specification is throwing unless every exception
2784 // type is an (unexpanded) pack expansion type.
2785 for (unsigned I = 0, N = NumExceptions; I != N; ++I)
2786 if (!getExceptionType(I)->getAs<PackExpansionType>())
2788 return ResultIfDependent;
2791 if (EST != EST_ComputedNoexcept)
2794 NoexceptResult NR = getNoexceptSpec(Ctx);
2795 if (NR == NR_Dependent)
2796 return ResultIfDependent;
2797 return NR == NR_Nothrow;
2800 bool FunctionProtoType::isTemplateVariadic() const {
2801 for (unsigned ArgIdx = getNumParams(); ArgIdx; --ArgIdx)
2802 if (isa<PackExpansionType>(getParamType(ArgIdx - 1)))
2808 void FunctionProtoType::Profile(llvm::FoldingSetNodeID &ID, QualType Result,
2809 const QualType *ArgTys, unsigned NumParams,
2810 const ExtProtoInfo &epi,
2811 const ASTContext &Context) {
2813 // We have to be careful not to get ambiguous profile encodings.
2814 // Note that valid type pointers are never ambiguous with anything else.
2816 // The encoding grammar begins:
2817 // type type* bool int bool
2818 // If that final bool is true, then there is a section for the EH spec:
2820 // This is followed by an optional "consumed argument" section of the
2821 // same length as the first type sequence:
2823 // Finally, we have the ext info and trailing return type flag:
2826 // There is no ambiguity between the consumed arguments and an empty EH
2827 // spec because of the leading 'bool' which unambiguously indicates
2828 // whether the following bool is the EH spec or part of the arguments.
2830 ID.AddPointer(Result.getAsOpaquePtr());
2831 for (unsigned i = 0; i != NumParams; ++i)
2832 ID.AddPointer(ArgTys[i].getAsOpaquePtr());
2833 // This method is relatively performance sensitive, so as a performance
2834 // shortcut, use one AddInteger call instead of four for the next four
2836 assert(!(unsigned(epi.Variadic) & ~1) &&
2837 !(unsigned(epi.TypeQuals) & ~255) &&
2838 !(unsigned(epi.RefQualifier) & ~3) &&
2839 !(unsigned(epi.ExceptionSpec.Type) & ~15) &&
2840 "Values larger than expected.");
2841 ID.AddInteger(unsigned(epi.Variadic) +
2842 (epi.TypeQuals << 1) +
2843 (epi.RefQualifier << 9) +
2844 (epi.ExceptionSpec.Type << 11));
2845 if (epi.ExceptionSpec.Type == EST_Dynamic) {
2846 for (QualType Ex : epi.ExceptionSpec.Exceptions)
2847 ID.AddPointer(Ex.getAsOpaquePtr());
2848 } else if (epi.ExceptionSpec.Type == EST_ComputedNoexcept &&
2849 epi.ExceptionSpec.NoexceptExpr) {
2850 epi.ExceptionSpec.NoexceptExpr->Profile(ID, Context, false);
2851 } else if (epi.ExceptionSpec.Type == EST_Uninstantiated ||
2852 epi.ExceptionSpec.Type == EST_Unevaluated) {
2853 ID.AddPointer(epi.ExceptionSpec.SourceDecl->getCanonicalDecl());
2855 if (epi.ExtParameterInfos) {
2856 for (unsigned i = 0; i != NumParams; ++i)
2857 ID.AddInteger(epi.ExtParameterInfos[i].getOpaqueValue());
2859 epi.ExtInfo.Profile(ID);
2860 ID.AddBoolean(epi.HasTrailingReturn);
2863 void FunctionProtoType::Profile(llvm::FoldingSetNodeID &ID,
2864 const ASTContext &Ctx) {
2865 Profile(ID, getReturnType(), param_type_begin(), NumParams, getExtProtoInfo(),
2869 QualType TypedefType::desugar() const {
2870 return getDecl()->getUnderlyingType();
2873 TypeOfExprType::TypeOfExprType(Expr *E, QualType can)
2874 : Type(TypeOfExpr, can, E->isTypeDependent(),
2875 E->isInstantiationDependent(),
2876 E->getType()->isVariablyModifiedType(),
2877 E->containsUnexpandedParameterPack()),
2881 bool TypeOfExprType::isSugared() const {
2882 return !TOExpr->isTypeDependent();
2885 QualType TypeOfExprType::desugar() const {
2887 return getUnderlyingExpr()->getType();
2889 return QualType(this, 0);
2892 void DependentTypeOfExprType::Profile(llvm::FoldingSetNodeID &ID,
2893 const ASTContext &Context, Expr *E) {
2894 E->Profile(ID, Context, true);
2897 DecltypeType::DecltypeType(Expr *E, QualType underlyingType, QualType can)
2898 // C++11 [temp.type]p2: "If an expression e involves a template parameter,
2899 // decltype(e) denotes a unique dependent type." Hence a decltype type is
2900 // type-dependent even if its expression is only instantiation-dependent.
2901 : Type(Decltype, can, E->isInstantiationDependent(),
2902 E->isInstantiationDependent(),
2903 E->getType()->isVariablyModifiedType(),
2904 E->containsUnexpandedParameterPack()),
2906 UnderlyingType(underlyingType) {
2909 bool DecltypeType::isSugared() const { return !E->isInstantiationDependent(); }
2911 QualType DecltypeType::desugar() const {
2913 return getUnderlyingType();
2915 return QualType(this, 0);
2918 DependentDecltypeType::DependentDecltypeType(const ASTContext &Context, Expr *E)
2919 : DecltypeType(E, Context.DependentTy), Context(Context) { }
2921 void DependentDecltypeType::Profile(llvm::FoldingSetNodeID &ID,
2922 const ASTContext &Context, Expr *E) {
2923 E->Profile(ID, Context, true);
2926 UnaryTransformType::UnaryTransformType(QualType BaseType,
2927 QualType UnderlyingType,
2929 QualType CanonicalType)
2930 : Type(UnaryTransform, CanonicalType, BaseType->isDependentType(),
2931 BaseType->isInstantiationDependentType(),
2932 BaseType->isVariablyModifiedType(),
2933 BaseType->containsUnexpandedParameterPack())
2934 , BaseType(BaseType), UnderlyingType(UnderlyingType), UKind(UKind)
2937 DependentUnaryTransformType::DependentUnaryTransformType(const ASTContext &C,
2940 : UnaryTransformType(BaseType, C.DependentTy, UKind, QualType())
2944 TagType::TagType(TypeClass TC, const TagDecl *D, QualType can)
2945 : Type(TC, can, D->isDependentType(),
2946 /*InstantiationDependent=*/D->isDependentType(),
2947 /*VariablyModified=*/false,
2948 /*ContainsUnexpandedParameterPack=*/false),
2949 decl(const_cast<TagDecl*>(D)) {}
2951 static TagDecl *getInterestingTagDecl(TagDecl *decl) {
2952 for (auto I : decl->redecls()) {
2953 if (I->isCompleteDefinition() || I->isBeingDefined())
2956 // If there's no definition (not even in progress), return what we have.
2960 TagDecl *TagType::getDecl() const {
2961 return getInterestingTagDecl(decl);
2964 bool TagType::isBeingDefined() const {
2965 return getDecl()->isBeingDefined();
2968 bool AttributedType::isQualifier() const {
2969 switch (getAttrKind()) {
2970 // These are type qualifiers in the traditional C sense: they annotate
2971 // something about a specific value/variable of a type. (They aren't
2972 // always part of the canonical type, though.)
2973 case AttributedType::attr_address_space:
2974 case AttributedType::attr_objc_gc:
2975 case AttributedType::attr_objc_ownership:
2976 case AttributedType::attr_objc_inert_unsafe_unretained:
2977 case AttributedType::attr_nonnull:
2978 case AttributedType::attr_nullable:
2979 case AttributedType::attr_null_unspecified:
2982 // These aren't qualifiers; they rewrite the modified type to be a
2983 // semantically different type.
2984 case AttributedType::attr_regparm:
2985 case AttributedType::attr_vector_size:
2986 case AttributedType::attr_neon_vector_type:
2987 case AttributedType::attr_neon_polyvector_type:
2988 case AttributedType::attr_pcs:
2989 case AttributedType::attr_pcs_vfp:
2990 case AttributedType::attr_noreturn:
2991 case AttributedType::attr_cdecl:
2992 case AttributedType::attr_fastcall:
2993 case AttributedType::attr_stdcall:
2994 case AttributedType::attr_thiscall:
2995 case AttributedType::attr_pascal:
2996 case AttributedType::attr_swiftcall:
2997 case AttributedType::attr_vectorcall:
2998 case AttributedType::attr_inteloclbicc:
2999 case AttributedType::attr_preserve_most:
3000 case AttributedType::attr_preserve_all:
3001 case AttributedType::attr_ms_abi:
3002 case AttributedType::attr_sysv_abi:
3003 case AttributedType::attr_ptr32:
3004 case AttributedType::attr_ptr64:
3005 case AttributedType::attr_sptr:
3006 case AttributedType::attr_uptr:
3007 case AttributedType::attr_objc_kindof:
3010 llvm_unreachable("bad attributed type kind");
3013 bool AttributedType::isMSTypeSpec() const {
3014 switch (getAttrKind()) {
3015 default: return false;
3022 llvm_unreachable("invalid attr kind");
3025 bool AttributedType::isCallingConv() const {
3026 switch (getAttrKind()) {
3031 case attr_address_space:
3033 case attr_vector_size:
3034 case attr_neon_vector_type:
3035 case attr_neon_polyvector_type:
3037 case attr_objc_ownership:
3038 case attr_objc_inert_unsafe_unretained:
3042 case attr_null_unspecified:
3043 case attr_objc_kindof:
3052 case attr_swiftcall:
3053 case attr_vectorcall:
3057 case attr_inteloclbicc:
3058 case attr_preserve_most:
3059 case attr_preserve_all:
3062 llvm_unreachable("invalid attr kind");
3065 CXXRecordDecl *InjectedClassNameType::getDecl() const {
3066 return cast<CXXRecordDecl>(getInterestingTagDecl(Decl));
3069 IdentifierInfo *TemplateTypeParmType::getIdentifier() const {
3070 return isCanonicalUnqualified() ? nullptr : getDecl()->getIdentifier();
3073 SubstTemplateTypeParmPackType::
3074 SubstTemplateTypeParmPackType(const TemplateTypeParmType *Param,
3076 const TemplateArgument &ArgPack)
3077 : Type(SubstTemplateTypeParmPack, Canon, true, true, false, true),
3079 Arguments(ArgPack.pack_begin()), NumArguments(ArgPack.pack_size())
3083 TemplateArgument SubstTemplateTypeParmPackType::getArgumentPack() const {
3084 return TemplateArgument(llvm::makeArrayRef(Arguments, NumArguments));
3087 void SubstTemplateTypeParmPackType::Profile(llvm::FoldingSetNodeID &ID) {
3088 Profile(ID, getReplacedParameter(), getArgumentPack());
3091 void SubstTemplateTypeParmPackType::Profile(llvm::FoldingSetNodeID &ID,
3092 const TemplateTypeParmType *Replaced,
3093 const TemplateArgument &ArgPack) {
3094 ID.AddPointer(Replaced);
3095 ID.AddInteger(ArgPack.pack_size());
3096 for (const auto &P : ArgPack.pack_elements())
3097 ID.AddPointer(P.getAsType().getAsOpaquePtr());
3100 bool TemplateSpecializationType::
3101 anyDependentTemplateArguments(const TemplateArgumentListInfo &Args,
3102 bool &InstantiationDependent) {
3103 return anyDependentTemplateArguments(Args.arguments(),
3104 InstantiationDependent);
3107 bool TemplateSpecializationType::
3108 anyDependentTemplateArguments(ArrayRef<TemplateArgumentLoc> Args,
3109 bool &InstantiationDependent) {
3110 for (const TemplateArgumentLoc &ArgLoc : Args) {
3111 if (ArgLoc.getArgument().isDependent()) {
3112 InstantiationDependent = true;
3116 if (ArgLoc.getArgument().isInstantiationDependent())
3117 InstantiationDependent = true;
3122 TemplateSpecializationType::
3123 TemplateSpecializationType(TemplateName T,
3124 ArrayRef<TemplateArgument> Args,
3125 QualType Canon, QualType AliasedType)
3126 : Type(TemplateSpecialization,
3127 Canon.isNull()? QualType(this, 0) : Canon,
3128 Canon.isNull()? true : Canon->isDependentType(),
3129 Canon.isNull()? true : Canon->isInstantiationDependentType(),
3131 T.containsUnexpandedParameterPack()),
3132 Template(T), NumArgs(Args.size()), TypeAlias(!AliasedType.isNull()) {
3133 assert(!T.getAsDependentTemplateName() &&
3134 "Use DependentTemplateSpecializationType for dependent template-name");
3135 assert((T.getKind() == TemplateName::Template ||
3136 T.getKind() == TemplateName::SubstTemplateTemplateParm ||
3137 T.getKind() == TemplateName::SubstTemplateTemplateParmPack) &&
3138 "Unexpected template name for TemplateSpecializationType");
3140 TemplateArgument *TemplateArgs
3141 = reinterpret_cast<TemplateArgument *>(this + 1);
3142 for (const TemplateArgument &Arg : Args) {
3143 // Update instantiation-dependent and variably-modified bits.
3144 // If the canonical type exists and is non-dependent, the template
3145 // specialization type can be non-dependent even if one of the type
3146 // arguments is. Given:
3147 // template<typename T> using U = int;
3148 // U<T> is always non-dependent, irrespective of the type T.
3149 // However, U<Ts> contains an unexpanded parameter pack, even though
3150 // its expansion (and thus its desugared type) doesn't.
3151 if (Arg.isInstantiationDependent())
3152 setInstantiationDependent();
3153 if (Arg.getKind() == TemplateArgument::Type &&
3154 Arg.getAsType()->isVariablyModifiedType())
3155 setVariablyModified();
3156 if (Arg.containsUnexpandedParameterPack())
3157 setContainsUnexpandedParameterPack();
3158 new (TemplateArgs++) TemplateArgument(Arg);
3161 // Store the aliased type if this is a type alias template specialization.
3163 TemplateArgument *Begin = reinterpret_cast<TemplateArgument *>(this + 1);
3164 *reinterpret_cast<QualType*>(Begin + getNumArgs()) = AliasedType;
3169 TemplateSpecializationType::Profile(llvm::FoldingSetNodeID &ID,
3171 ArrayRef<TemplateArgument> Args,
3172 const ASTContext &Context) {
3174 for (const TemplateArgument &Arg : Args)
3175 Arg.Profile(ID, Context);
3179 QualifierCollector::apply(const ASTContext &Context, QualType QT) const {
3180 if (!hasNonFastQualifiers())
3181 return QT.withFastQualifiers(getFastQualifiers());
3183 return Context.getQualifiedType(QT, *this);
3187 QualifierCollector::apply(const ASTContext &Context, const Type *T) const {
3188 if (!hasNonFastQualifiers())
3189 return QualType(T, getFastQualifiers());
3191 return Context.getQualifiedType(T, *this);
3194 void ObjCObjectTypeImpl::Profile(llvm::FoldingSetNodeID &ID,
3196 ArrayRef<QualType> typeArgs,
3197 ArrayRef<ObjCProtocolDecl *> protocols,
3199 ID.AddPointer(BaseType.getAsOpaquePtr());
3200 ID.AddInteger(typeArgs.size());
3201 for (auto typeArg : typeArgs)
3202 ID.AddPointer(typeArg.getAsOpaquePtr());
3203 ID.AddInteger(protocols.size());
3204 for (auto proto : protocols)
3205 ID.AddPointer(proto);
3206 ID.AddBoolean(isKindOf);
3209 void ObjCObjectTypeImpl::Profile(llvm::FoldingSetNodeID &ID) {
3210 Profile(ID, getBaseType(), getTypeArgsAsWritten(),
3211 llvm::makeArrayRef(qual_begin(), getNumProtocols()),
3212 isKindOfTypeAsWritten());
3217 /// \brief The cached properties of a type.
3218 class CachedProperties {
3223 CachedProperties(Linkage L, bool local) : L(L), local(local) {}
3225 Linkage getLinkage() const { return L; }
3226 bool hasLocalOrUnnamedType() const { return local; }
3228 friend CachedProperties merge(CachedProperties L, CachedProperties R) {
3229 Linkage MergedLinkage = minLinkage(L.L, R.L);
3230 return CachedProperties(MergedLinkage,
3231 L.hasLocalOrUnnamedType() | R.hasLocalOrUnnamedType());
3236 static CachedProperties computeCachedProperties(const Type *T);
3239 /// The type-property cache. This is templated so as to be
3240 /// instantiated at an internal type to prevent unnecessary symbol
3242 template <class Private> class TypePropertyCache {
3244 static CachedProperties get(QualType T) {
3245 return get(T.getTypePtr());
3248 static CachedProperties get(const Type *T) {
3250 return CachedProperties(T->TypeBits.getLinkage(),
3251 T->TypeBits.hasLocalOrUnnamedType());
3254 static void ensure(const Type *T) {
3255 // If the cache is valid, we're okay.
3256 if (T->TypeBits.isCacheValid()) return;
3258 // If this type is non-canonical, ask its canonical type for the
3259 // relevant information.
3260 if (!T->isCanonicalUnqualified()) {
3261 const Type *CT = T->getCanonicalTypeInternal().getTypePtr();
3263 T->TypeBits.CacheValid = true;
3264 T->TypeBits.CachedLinkage = CT->TypeBits.CachedLinkage;
3265 T->TypeBits.CachedLocalOrUnnamed = CT->TypeBits.CachedLocalOrUnnamed;
3269 // Compute the cached properties and then set the cache.
3270 CachedProperties Result = computeCachedProperties(T);
3271 T->TypeBits.CacheValid = true;
3272 T->TypeBits.CachedLinkage = Result.getLinkage();
3273 T->TypeBits.CachedLocalOrUnnamed = Result.hasLocalOrUnnamedType();
3278 // Instantiate the friend template at a private class. In a
3279 // reasonable implementation, these symbols will be internal.
3280 // It is terrible that this is the best way to accomplish this.
3281 namespace { class Private {}; }
3282 typedef TypePropertyCache<Private> Cache;
3284 static CachedProperties computeCachedProperties(const Type *T) {
3285 switch (T->getTypeClass()) {
3286 #define TYPE(Class,Base)
3287 #define NON_CANONICAL_TYPE(Class,Base) case Type::Class:
3288 #include "clang/AST/TypeNodes.def"
3289 llvm_unreachable("didn't expect a non-canonical type here");
3291 #define TYPE(Class,Base)
3292 #define DEPENDENT_TYPE(Class,Base) case Type::Class:
3293 #define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class,Base) case Type::Class:
3294 #include "clang/AST/TypeNodes.def"
3295 // Treat instantiation-dependent types as external.
3296 assert(T->isInstantiationDependentType());
3297 return CachedProperties(ExternalLinkage, false);
3300 // Give non-deduced 'auto' types external linkage. We should only see them
3301 // here in error recovery.
3302 return CachedProperties(ExternalLinkage, false);
3305 // C++ [basic.link]p8:
3306 // A type is said to have linkage if and only if:
3307 // - it is a fundamental type (3.9.1); or
3308 return CachedProperties(ExternalLinkage, false);
3312 const TagDecl *Tag = cast<TagType>(T)->getDecl();
3314 // C++ [basic.link]p8:
3315 // - it is a class or enumeration type that is named (or has a name
3316 // for linkage purposes (7.1.3)) and the name has linkage; or
3317 // - it is a specialization of a class template (14); or
3318 Linkage L = Tag->getLinkageInternal();
3319 bool IsLocalOrUnnamed =
3320 Tag->getDeclContext()->isFunctionOrMethod() ||
3321 !Tag->hasNameForLinkage();
3322 return CachedProperties(L, IsLocalOrUnnamed);
3325 // C++ [basic.link]p8:
3326 // - it is a compound type (3.9.2) other than a class or enumeration,
3327 // compounded exclusively from types that have linkage; or
3329 return Cache::get(cast<ComplexType>(T)->getElementType());
3331 return Cache::get(cast<PointerType>(T)->getPointeeType());
3332 case Type::BlockPointer:
3333 return Cache::get(cast<BlockPointerType>(T)->getPointeeType());
3334 case Type::LValueReference:
3335 case Type::RValueReference:
3336 return Cache::get(cast<ReferenceType>(T)->getPointeeType());
3337 case Type::MemberPointer: {
3338 const MemberPointerType *MPT = cast<MemberPointerType>(T);
3339 return merge(Cache::get(MPT->getClass()),
3340 Cache::get(MPT->getPointeeType()));
3342 case Type::ConstantArray:
3343 case Type::IncompleteArray:
3344 case Type::VariableArray:
3345 return Cache::get(cast<ArrayType>(T)->getElementType());
3347 case Type::ExtVector:
3348 return Cache::get(cast<VectorType>(T)->getElementType());
3349 case Type::FunctionNoProto:
3350 return Cache::get(cast<FunctionType>(T)->getReturnType());
3351 case Type::FunctionProto: {
3352 const FunctionProtoType *FPT = cast<FunctionProtoType>(T);
3353 CachedProperties result = Cache::get(FPT->getReturnType());
3354 for (const auto &ai : FPT->param_types())
3355 result = merge(result, Cache::get(ai));
3358 case Type::ObjCInterface: {
3359 Linkage L = cast<ObjCInterfaceType>(T)->getDecl()->getLinkageInternal();
3360 return CachedProperties(L, false);
3362 case Type::ObjCObject:
3363 return Cache::get(cast<ObjCObjectType>(T)->getBaseType());
3364 case Type::ObjCObjectPointer:
3365 return Cache::get(cast<ObjCObjectPointerType>(T)->getPointeeType());
3367 return Cache::get(cast<AtomicType>(T)->getValueType());
3369 return Cache::get(cast<PipeType>(T)->getElementType());
3372 llvm_unreachable("unhandled type class");
3375 /// \brief Determine the linkage of this type.
3376 Linkage Type::getLinkage() const {
3377 Cache::ensure(this);
3378 return TypeBits.getLinkage();
3381 bool Type::hasUnnamedOrLocalType() const {
3382 Cache::ensure(this);
3383 return TypeBits.hasLocalOrUnnamedType();
3386 static LinkageInfo computeLinkageInfo(QualType T);
3388 static LinkageInfo computeLinkageInfo(const Type *T) {
3389 switch (T->getTypeClass()) {
3390 #define TYPE(Class,Base)
3391 #define NON_CANONICAL_TYPE(Class,Base) case Type::Class:
3392 #include "clang/AST/TypeNodes.def"
3393 llvm_unreachable("didn't expect a non-canonical type here");
3395 #define TYPE(Class,Base)
3396 #define DEPENDENT_TYPE(Class,Base) case Type::Class:
3397 #define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class,Base) case Type::Class:
3398 #include "clang/AST/TypeNodes.def"
3399 // Treat instantiation-dependent types as external.
3400 assert(T->isInstantiationDependentType());
3401 return LinkageInfo::external();
3404 return LinkageInfo::external();
3407 return LinkageInfo::external();
3411 return cast<TagType>(T)->getDecl()->getLinkageAndVisibility();
3414 return computeLinkageInfo(cast<ComplexType>(T)->getElementType());
3416 return computeLinkageInfo(cast<PointerType>(T)->getPointeeType());
3417 case Type::BlockPointer:
3418 return computeLinkageInfo(cast<BlockPointerType>(T)->getPointeeType());
3419 case Type::LValueReference:
3420 case Type::RValueReference:
3421 return computeLinkageInfo(cast<ReferenceType>(T)->getPointeeType());
3422 case Type::MemberPointer: {
3423 const MemberPointerType *MPT = cast<MemberPointerType>(T);
3424 LinkageInfo LV = computeLinkageInfo(MPT->getClass());
3425 LV.merge(computeLinkageInfo(MPT->getPointeeType()));
3428 case Type::ConstantArray:
3429 case Type::IncompleteArray:
3430 case Type::VariableArray:
3431 return computeLinkageInfo(cast<ArrayType>(T)->getElementType());
3433 case Type::ExtVector:
3434 return computeLinkageInfo(cast<VectorType>(T)->getElementType());
3435 case Type::FunctionNoProto:
3436 return computeLinkageInfo(cast<FunctionType>(T)->getReturnType());
3437 case Type::FunctionProto: {
3438 const FunctionProtoType *FPT = cast<FunctionProtoType>(T);
3439 LinkageInfo LV = computeLinkageInfo(FPT->getReturnType());
3440 for (const auto &ai : FPT->param_types())
3441 LV.merge(computeLinkageInfo(ai));
3444 case Type::ObjCInterface:
3445 return cast<ObjCInterfaceType>(T)->getDecl()->getLinkageAndVisibility();
3446 case Type::ObjCObject:
3447 return computeLinkageInfo(cast<ObjCObjectType>(T)->getBaseType());
3448 case Type::ObjCObjectPointer:
3449 return computeLinkageInfo(cast<ObjCObjectPointerType>(T)->getPointeeType());
3451 return computeLinkageInfo(cast<AtomicType>(T)->getValueType());
3453 return computeLinkageInfo(cast<PipeType>(T)->getElementType());
3456 llvm_unreachable("unhandled type class");
3459 static LinkageInfo computeLinkageInfo(QualType T) {
3460 return computeLinkageInfo(T.getTypePtr());
3463 bool Type::isLinkageValid() const {
3464 if (!TypeBits.isCacheValid())
3467 return computeLinkageInfo(getCanonicalTypeInternal()).getLinkage() ==
3468 TypeBits.getLinkage();
3471 LinkageInfo Type::getLinkageAndVisibility() const {
3472 if (!isCanonicalUnqualified())
3473 return computeLinkageInfo(getCanonicalTypeInternal());
3475 LinkageInfo LV = computeLinkageInfo(this);
3476 assert(LV.getLinkage() == getLinkage());
3480 Optional<NullabilityKind> Type::getNullability(const ASTContext &context) const {
3481 QualType type(this, 0);
3483 // Check whether this is an attributed type with nullability
3485 if (auto attributed = dyn_cast<AttributedType>(type.getTypePtr())) {
3486 if (auto nullability = attributed->getImmediateNullability())
3490 // Desugar the type. If desugaring does nothing, we're done.
3491 QualType desugared = type.getSingleStepDesugaredType(context);
3492 if (desugared.getTypePtr() == type.getTypePtr())
3499 bool Type::canHaveNullability() const {
3500 QualType type = getCanonicalTypeInternal();
3502 switch (type->getTypeClass()) {
3503 // We'll only see canonical types here.
3504 #define NON_CANONICAL_TYPE(Class, Parent) \
3506 llvm_unreachable("non-canonical type");
3507 #define TYPE(Class, Parent)
3508 #include "clang/AST/TypeNodes.def"
3512 case Type::BlockPointer:
3513 case Type::MemberPointer:
3514 case Type::ObjCObjectPointer:
3517 // Dependent types that could instantiate to pointer types.
3518 case Type::UnresolvedUsing:
3519 case Type::TypeOfExpr:
3521 case Type::Decltype:
3522 case Type::UnaryTransform:
3523 case Type::TemplateTypeParm:
3524 case Type::SubstTemplateTypeParmPack:
3525 case Type::DependentName:
3526 case Type::DependentTemplateSpecialization:
3529 // Dependent template specializations can instantiate to pointer
3530 // types unless they're known to be specializations of a class
3532 case Type::TemplateSpecialization:
3533 if (TemplateDecl *templateDecl
3534 = cast<TemplateSpecializationType>(type.getTypePtr())
3535 ->getTemplateName().getAsTemplateDecl()) {
3536 if (isa<ClassTemplateDecl>(templateDecl))
3541 // auto is considered dependent when it isn't deduced.
3543 return !cast<AutoType>(type.getTypePtr())->isDeduced();
3546 switch (cast<BuiltinType>(type.getTypePtr())->getKind()) {
3547 // Signed, unsigned, and floating-point types cannot have nullability.
3548 #define SIGNED_TYPE(Id, SingletonId) case BuiltinType::Id:
3549 #define UNSIGNED_TYPE(Id, SingletonId) case BuiltinType::Id:
3550 #define FLOATING_TYPE(Id, SingletonId) case BuiltinType::Id:
3551 #define BUILTIN_TYPE(Id, SingletonId)
3552 #include "clang/AST/BuiltinTypes.def"
3555 // Dependent types that could instantiate to a pointer type.
3556 case BuiltinType::Dependent:
3557 case BuiltinType::Overload:
3558 case BuiltinType::BoundMember:
3559 case BuiltinType::PseudoObject:
3560 case BuiltinType::UnknownAny:
3561 case BuiltinType::ARCUnbridgedCast:
3564 case BuiltinType::Void:
3565 case BuiltinType::ObjCId:
3566 case BuiltinType::ObjCClass:
3567 case BuiltinType::ObjCSel:
3568 #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
3569 case BuiltinType::Id:
3570 #include "clang/Basic/OpenCLImageTypes.def"
3571 case BuiltinType::OCLSampler:
3572 case BuiltinType::OCLEvent:
3573 case BuiltinType::OCLClkEvent:
3574 case BuiltinType::OCLQueue:
3575 case BuiltinType::OCLNDRange:
3576 case BuiltinType::OCLReserveID:
3577 case BuiltinType::BuiltinFn:
3578 case BuiltinType::NullPtr:
3579 case BuiltinType::OMPArraySection:
3583 // Non-pointer types.
3585 case Type::LValueReference:
3586 case Type::RValueReference:
3587 case Type::ConstantArray:
3588 case Type::IncompleteArray:
3589 case Type::VariableArray:
3590 case Type::DependentSizedArray:
3591 case Type::DependentSizedExtVector:
3593 case Type::ExtVector:
3594 case Type::FunctionProto:
3595 case Type::FunctionNoProto:
3598 case Type::InjectedClassName:
3599 case Type::PackExpansion:
3600 case Type::ObjCObject:
3601 case Type::ObjCInterface:
3606 llvm_unreachable("bad type kind!");
3609 llvm::Optional<NullabilityKind> AttributedType::getImmediateNullability() const {
3610 if (getAttrKind() == AttributedType::attr_nonnull)
3611 return NullabilityKind::NonNull;
3612 if (getAttrKind() == AttributedType::attr_nullable)
3613 return NullabilityKind::Nullable;
3614 if (getAttrKind() == AttributedType::attr_null_unspecified)
3615 return NullabilityKind::Unspecified;
3619 Optional<NullabilityKind> AttributedType::stripOuterNullability(QualType &T) {
3620 if (auto attributed = dyn_cast<AttributedType>(T.getTypePtr())) {
3621 if (auto nullability = attributed->getImmediateNullability()) {
3622 T = attributed->getModifiedType();
3630 bool Type::isBlockCompatibleObjCPointerType(ASTContext &ctx) const {
3631 const ObjCObjectPointerType *objcPtr = getAs<ObjCObjectPointerType>();
3635 if (objcPtr->isObjCIdType()) {
3636 // id is always okay.
3640 // Blocks are NSObjects.
3641 if (ObjCInterfaceDecl *iface = objcPtr->getInterfaceDecl()) {
3642 if (iface->getIdentifier() != ctx.getNSObjectName())
3645 // Continue to check qualifiers, below.
3646 } else if (objcPtr->isObjCQualifiedIdType()) {
3647 // Continue to check qualifiers, below.
3652 // Check protocol qualifiers.
3653 for (ObjCProtocolDecl *proto : objcPtr->quals()) {
3654 // Blocks conform to NSObject and NSCopying.
3655 if (proto->getIdentifier() != ctx.getNSObjectName() &&
3656 proto->getIdentifier() != ctx.getNSCopyingName())
3663 Qualifiers::ObjCLifetime Type::getObjCARCImplicitLifetime() const {
3664 if (isObjCARCImplicitlyUnretainedType())
3665 return Qualifiers::OCL_ExplicitNone;
3666 return Qualifiers::OCL_Strong;
3669 bool Type::isObjCARCImplicitlyUnretainedType() const {
3670 assert(isObjCLifetimeType() &&
3671 "cannot query implicit lifetime for non-inferrable type");
3673 const Type *canon = getCanonicalTypeInternal().getTypePtr();
3675 // Walk down to the base type. We don't care about qualifiers for this.
3676 while (const ArrayType *array = dyn_cast<ArrayType>(canon))
3677 canon = array->getElementType().getTypePtr();
3679 if (const ObjCObjectPointerType *opt
3680 = dyn_cast<ObjCObjectPointerType>(canon)) {
3681 // Class and Class<Protocol> don't require retention.
3682 if (opt->getObjectType()->isObjCClass())
3689 bool Type::isObjCNSObjectType() const {
3690 if (const TypedefType *typedefType = dyn_cast<TypedefType>(this))
3691 return typedefType->getDecl()->hasAttr<ObjCNSObjectAttr>();
3694 bool Type::isObjCIndependentClassType() const {
3695 if (const TypedefType *typedefType = dyn_cast<TypedefType>(this))
3696 return typedefType->getDecl()->hasAttr<ObjCIndependentClassAttr>();
3699 bool Type::isObjCRetainableType() const {
3700 return isObjCObjectPointerType() ||
3701 isBlockPointerType() ||
3702 isObjCNSObjectType();
3704 bool Type::isObjCIndirectLifetimeType() const {
3705 if (isObjCLifetimeType())
3707 if (const PointerType *OPT = getAs<PointerType>())
3708 return OPT->getPointeeType()->isObjCIndirectLifetimeType();
3709 if (const ReferenceType *Ref = getAs<ReferenceType>())
3710 return Ref->getPointeeType()->isObjCIndirectLifetimeType();
3711 if (const MemberPointerType *MemPtr = getAs<MemberPointerType>())
3712 return MemPtr->getPointeeType()->isObjCIndirectLifetimeType();
3716 /// Returns true if objects of this type have lifetime semantics under
3718 bool Type::isObjCLifetimeType() const {
3719 const Type *type = this;
3720 while (const ArrayType *array = type->getAsArrayTypeUnsafe())
3721 type = array->getElementType().getTypePtr();
3722 return type->isObjCRetainableType();
3725 /// \brief Determine whether the given type T is a "bridgable" Objective-C type,
3726 /// which is either an Objective-C object pointer type or an
3727 bool Type::isObjCARCBridgableType() const {
3728 return isObjCObjectPointerType() || isBlockPointerType();
3731 /// \brief Determine whether the given type T is a "bridgeable" C type.
3732 bool Type::isCARCBridgableType() const {
3733 const PointerType *Pointer = getAs<PointerType>();
3737 QualType Pointee = Pointer->getPointeeType();
3738 return Pointee->isVoidType() || Pointee->isRecordType();
3741 bool Type::hasSizedVLAType() const {
3742 if (!isVariablyModifiedType()) return false;
3744 if (const PointerType *ptr = getAs<PointerType>())
3745 return ptr->getPointeeType()->hasSizedVLAType();
3746 if (const ReferenceType *ref = getAs<ReferenceType>())
3747 return ref->getPointeeType()->hasSizedVLAType();
3748 if (const ArrayType *arr = getAsArrayTypeUnsafe()) {
3749 if (isa<VariableArrayType>(arr) &&
3750 cast<VariableArrayType>(arr)->getSizeExpr())
3753 return arr->getElementType()->hasSizedVLAType();
3759 QualType::DestructionKind QualType::isDestructedTypeImpl(QualType type) {
3760 switch (type.getObjCLifetime()) {
3761 case Qualifiers::OCL_None:
3762 case Qualifiers::OCL_ExplicitNone:
3763 case Qualifiers::OCL_Autoreleasing:
3766 case Qualifiers::OCL_Strong:
3767 return DK_objc_strong_lifetime;
3768 case Qualifiers::OCL_Weak:
3769 return DK_objc_weak_lifetime;
3772 /// Currently, the only destruction kind we recognize is C++ objects
3773 /// with non-trivial destructors.
3774 const CXXRecordDecl *record =
3775 type->getBaseElementTypeUnsafe()->getAsCXXRecordDecl();
3776 if (record && record->hasDefinition() && !record->hasTrivialDestructor())
3777 return DK_cxx_destructor;
3782 CXXRecordDecl *MemberPointerType::getMostRecentCXXRecordDecl() const {
3783 return getClass()->getAsCXXRecordDecl()->getMostRecentDecl();