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 "llvm/ADT/APSInt.h"
26 #include "llvm/ADT/StringExtras.h"
27 #include "llvm/Support/raw_ostream.h"
29 using namespace clang;
31 bool Qualifiers::isStrictSupersetOf(Qualifiers Other) const {
32 return (*this != Other) &&
33 // CVR qualifiers superset
34 (((Mask & CVRMask) | (Other.Mask & CVRMask)) == (Mask & CVRMask)) &&
35 // ObjC GC qualifiers superset
36 ((getObjCGCAttr() == Other.getObjCGCAttr()) ||
37 (hasObjCGCAttr() && !Other.hasObjCGCAttr())) &&
38 // Address space superset.
39 ((getAddressSpace() == Other.getAddressSpace()) ||
40 (hasAddressSpace()&& !Other.hasAddressSpace())) &&
41 // Lifetime qualifier superset.
42 ((getObjCLifetime() == Other.getObjCLifetime()) ||
43 (hasObjCLifetime() && !Other.hasObjCLifetime()));
46 const IdentifierInfo* QualType::getBaseTypeIdentifier() const {
47 const Type* ty = getTypePtr();
48 NamedDecl *ND = nullptr;
49 if (ty->isPointerType() || ty->isReferenceType())
50 return ty->getPointeeType().getBaseTypeIdentifier();
51 else if (ty->isRecordType())
52 ND = ty->getAs<RecordType>()->getDecl();
53 else if (ty->isEnumeralType())
54 ND = ty->getAs<EnumType>()->getDecl();
55 else if (ty->getTypeClass() == Type::Typedef)
56 ND = ty->getAs<TypedefType>()->getDecl();
57 else if (ty->isArrayType())
58 return ty->castAsArrayTypeUnsafe()->
59 getElementType().getBaseTypeIdentifier();
62 return ND->getIdentifier();
66 bool QualType::isConstant(QualType T, ASTContext &Ctx) {
67 if (T.isConstQualified())
70 if (const ArrayType *AT = Ctx.getAsArrayType(T))
71 return AT->getElementType().isConstant(Ctx);
76 unsigned ConstantArrayType::getNumAddressingBits(ASTContext &Context,
78 const llvm::APInt &NumElements) {
79 uint64_t ElementSize = Context.getTypeSizeInChars(ElementType).getQuantity();
81 // Fast path the common cases so we can avoid the conservative computation
82 // below, which in common cases allocates "large" APSInt values, which are
85 // If the element size is a power of 2, we can directly compute the additional
86 // number of addressing bits beyond those required for the element count.
87 if (llvm::isPowerOf2_64(ElementSize)) {
88 return NumElements.getActiveBits() + llvm::Log2_64(ElementSize);
91 // If both the element count and element size fit in 32-bits, we can do the
92 // computation directly in 64-bits.
93 if ((ElementSize >> 32) == 0 && NumElements.getBitWidth() <= 64 &&
94 (NumElements.getZExtValue() >> 32) == 0) {
95 uint64_t TotalSize = NumElements.getZExtValue() * ElementSize;
96 return 64 - llvm::countLeadingZeros(TotalSize);
99 // Otherwise, use APSInt to handle arbitrary sized values.
100 llvm::APSInt SizeExtended(NumElements, true);
101 unsigned SizeTypeBits = Context.getTypeSize(Context.getSizeType());
102 SizeExtended = SizeExtended.extend(std::max(SizeTypeBits,
103 SizeExtended.getBitWidth()) * 2);
105 llvm::APSInt TotalSize(llvm::APInt(SizeExtended.getBitWidth(), ElementSize));
106 TotalSize *= SizeExtended;
108 return TotalSize.getActiveBits();
111 unsigned ConstantArrayType::getMaxSizeBits(ASTContext &Context) {
112 unsigned Bits = Context.getTypeSize(Context.getSizeType());
114 // Limit the number of bits in size_t so that maximal bit size fits 64 bit
115 // integer (see PR8256). We can do this as currently there is no hardware
116 // that supports full 64-bit virtual space.
123 DependentSizedArrayType::DependentSizedArrayType(const ASTContext &Context,
124 QualType et, QualType can,
125 Expr *e, ArraySizeModifier sm,
127 SourceRange brackets)
128 : ArrayType(DependentSizedArray, et, can, sm, tq,
129 (et->containsUnexpandedParameterPack() ||
130 (e && e->containsUnexpandedParameterPack()))),
131 Context(Context), SizeExpr((Stmt*) e), Brackets(brackets)
135 void DependentSizedArrayType::Profile(llvm::FoldingSetNodeID &ID,
136 const ASTContext &Context,
138 ArraySizeModifier SizeMod,
141 ID.AddPointer(ET.getAsOpaquePtr());
142 ID.AddInteger(SizeMod);
143 ID.AddInteger(TypeQuals);
144 E->Profile(ID, Context, true);
147 DependentSizedExtVectorType::DependentSizedExtVectorType(const
149 QualType ElementType,
153 : Type(DependentSizedExtVector, can, /*Dependent=*/true,
154 /*InstantiationDependent=*/true,
155 ElementType->isVariablyModifiedType(),
156 (ElementType->containsUnexpandedParameterPack() ||
157 (SizeExpr && SizeExpr->containsUnexpandedParameterPack()))),
158 Context(Context), SizeExpr(SizeExpr), ElementType(ElementType),
164 DependentSizedExtVectorType::Profile(llvm::FoldingSetNodeID &ID,
165 const ASTContext &Context,
166 QualType ElementType, Expr *SizeExpr) {
167 ID.AddPointer(ElementType.getAsOpaquePtr());
168 SizeExpr->Profile(ID, Context, true);
171 VectorType::VectorType(QualType vecType, unsigned nElements, QualType canonType,
173 : Type(Vector, canonType, vecType->isDependentType(),
174 vecType->isInstantiationDependentType(),
175 vecType->isVariablyModifiedType(),
176 vecType->containsUnexpandedParameterPack()),
179 VectorTypeBits.VecKind = vecKind;
180 VectorTypeBits.NumElements = nElements;
183 VectorType::VectorType(TypeClass tc, QualType vecType, unsigned nElements,
184 QualType canonType, VectorKind vecKind)
185 : Type(tc, canonType, vecType->isDependentType(),
186 vecType->isInstantiationDependentType(),
187 vecType->isVariablyModifiedType(),
188 vecType->containsUnexpandedParameterPack()),
191 VectorTypeBits.VecKind = vecKind;
192 VectorTypeBits.NumElements = nElements;
195 /// getArrayElementTypeNoTypeQual - If this is an array type, return the
196 /// element type of the array, potentially with type qualifiers missing.
197 /// This method should never be used when type qualifiers are meaningful.
198 const Type *Type::getArrayElementTypeNoTypeQual() const {
199 // If this is directly an array type, return it.
200 if (const ArrayType *ATy = dyn_cast<ArrayType>(this))
201 return ATy->getElementType().getTypePtr();
203 // If the canonical form of this type isn't the right kind, reject it.
204 if (!isa<ArrayType>(CanonicalType))
207 // If this is a typedef for an array type, strip the typedef off without
208 // losing all typedef information.
209 return cast<ArrayType>(getUnqualifiedDesugaredType())
210 ->getElementType().getTypePtr();
213 /// getDesugaredType - Return the specified type with any "sugar" removed from
214 /// the type. This takes off typedefs, typeof's etc. If the outer level of
215 /// the type is already concrete, it returns it unmodified. This is similar
216 /// to getting the canonical type, but it doesn't remove *all* typedefs. For
217 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is
219 QualType QualType::getDesugaredType(QualType T, const ASTContext &Context) {
220 SplitQualType split = getSplitDesugaredType(T);
221 return Context.getQualifiedType(split.Ty, split.Quals);
224 QualType QualType::getSingleStepDesugaredTypeImpl(QualType type,
225 const ASTContext &Context) {
226 SplitQualType split = type.split();
227 QualType desugar = split.Ty->getLocallyUnqualifiedSingleStepDesugaredType();
228 return Context.getQualifiedType(desugar, split.Quals);
231 QualType Type::getLocallyUnqualifiedSingleStepDesugaredType() const {
232 switch (getTypeClass()) {
233 #define ABSTRACT_TYPE(Class, Parent)
234 #define TYPE(Class, Parent) \
235 case Type::Class: { \
236 const Class##Type *ty = cast<Class##Type>(this); \
237 if (!ty->isSugared()) return QualType(ty, 0); \
238 return ty->desugar(); \
240 #include "clang/AST/TypeNodes.def"
242 llvm_unreachable("bad type kind!");
245 SplitQualType QualType::getSplitDesugaredType(QualType T) {
246 QualifierCollector Qs;
250 const Type *CurTy = Qs.strip(Cur);
251 switch (CurTy->getTypeClass()) {
252 #define ABSTRACT_TYPE(Class, Parent)
253 #define TYPE(Class, Parent) \
254 case Type::Class: { \
255 const Class##Type *Ty = cast<Class##Type>(CurTy); \
256 if (!Ty->isSugared()) \
257 return SplitQualType(Ty, Qs); \
258 Cur = Ty->desugar(); \
261 #include "clang/AST/TypeNodes.def"
266 SplitQualType QualType::getSplitUnqualifiedTypeImpl(QualType type) {
267 SplitQualType split = type.split();
269 // All the qualifiers we've seen so far.
270 Qualifiers quals = split.Quals;
272 // The last type node we saw with any nodes inside it.
273 const Type *lastTypeWithQuals = split.Ty;
278 // Do a single-step desugar, aborting the loop if the type isn't
280 switch (split.Ty->getTypeClass()) {
281 #define ABSTRACT_TYPE(Class, Parent)
282 #define TYPE(Class, Parent) \
283 case Type::Class: { \
284 const Class##Type *ty = cast<Class##Type>(split.Ty); \
285 if (!ty->isSugared()) goto done; \
286 next = ty->desugar(); \
289 #include "clang/AST/TypeNodes.def"
292 // Otherwise, split the underlying type. If that yields qualifiers,
293 // update the information.
294 split = next.split();
295 if (!split.Quals.empty()) {
296 lastTypeWithQuals = split.Ty;
297 quals.addConsistentQualifiers(split.Quals);
302 return SplitQualType(lastTypeWithQuals, quals);
305 QualType QualType::IgnoreParens(QualType T) {
306 // FIXME: this seems inherently un-qualifiers-safe.
307 while (const ParenType *PT = T->getAs<ParenType>())
308 T = PT->getInnerType();
312 /// \brief This will check for a T (which should be a Type which can act as
313 /// sugar, such as a TypedefType) by removing any existing sugar until it
314 /// reaches a T or a non-sugared type.
315 template<typename T> static const T *getAsSugar(const Type *Cur) {
317 if (const T *Sugar = dyn_cast<T>(Cur))
319 switch (Cur->getTypeClass()) {
320 #define ABSTRACT_TYPE(Class, Parent)
321 #define TYPE(Class, Parent) \
322 case Type::Class: { \
323 const Class##Type *Ty = cast<Class##Type>(Cur); \
324 if (!Ty->isSugared()) return 0; \
325 Cur = Ty->desugar().getTypePtr(); \
328 #include "clang/AST/TypeNodes.def"
333 template <> const TypedefType *Type::getAs() const {
334 return getAsSugar<TypedefType>(this);
337 template <> const TemplateSpecializationType *Type::getAs() const {
338 return getAsSugar<TemplateSpecializationType>(this);
341 template <> const AttributedType *Type::getAs() const {
342 return getAsSugar<AttributedType>(this);
345 /// getUnqualifiedDesugaredType - Pull any qualifiers and syntactic
346 /// sugar off the given type. This should produce an object of the
347 /// same dynamic type as the canonical type.
348 const Type *Type::getUnqualifiedDesugaredType() const {
349 const Type *Cur = this;
352 switch (Cur->getTypeClass()) {
353 #define ABSTRACT_TYPE(Class, Parent)
354 #define TYPE(Class, Parent) \
356 const Class##Type *Ty = cast<Class##Type>(Cur); \
357 if (!Ty->isSugared()) return Cur; \
358 Cur = Ty->desugar().getTypePtr(); \
361 #include "clang/AST/TypeNodes.def"
365 bool Type::isClassType() const {
366 if (const RecordType *RT = getAs<RecordType>())
367 return RT->getDecl()->isClass();
370 bool Type::isStructureType() const {
371 if (const RecordType *RT = getAs<RecordType>())
372 return RT->getDecl()->isStruct();
375 bool Type::isInterfaceType() const {
376 if (const RecordType *RT = getAs<RecordType>())
377 return RT->getDecl()->isInterface();
380 bool Type::isStructureOrClassType() const {
381 if (const RecordType *RT = getAs<RecordType>())
382 return RT->getDecl()->isStruct() || RT->getDecl()->isClass() ||
383 RT->getDecl()->isInterface();
386 bool Type::isVoidPointerType() const {
387 if (const PointerType *PT = getAs<PointerType>())
388 return PT->getPointeeType()->isVoidType();
392 bool Type::isUnionType() const {
393 if (const RecordType *RT = getAs<RecordType>())
394 return RT->getDecl()->isUnion();
398 bool Type::isComplexType() const {
399 if (const ComplexType *CT = dyn_cast<ComplexType>(CanonicalType))
400 return CT->getElementType()->isFloatingType();
404 bool Type::isComplexIntegerType() const {
405 // Check for GCC complex integer extension.
406 return getAsComplexIntegerType();
409 const ComplexType *Type::getAsComplexIntegerType() const {
410 if (const ComplexType *Complex = getAs<ComplexType>())
411 if (Complex->getElementType()->isIntegerType())
416 QualType Type::getPointeeType() const {
417 if (const PointerType *PT = getAs<PointerType>())
418 return PT->getPointeeType();
419 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>())
420 return OPT->getPointeeType();
421 if (const BlockPointerType *BPT = getAs<BlockPointerType>())
422 return BPT->getPointeeType();
423 if (const ReferenceType *RT = getAs<ReferenceType>())
424 return RT->getPointeeType();
425 if (const MemberPointerType *MPT = getAs<MemberPointerType>())
426 return MPT->getPointeeType();
427 if (const DecayedType *DT = getAs<DecayedType>())
428 return DT->getPointeeType();
432 const RecordType *Type::getAsStructureType() const {
433 // If this is directly a structure type, return it.
434 if (const RecordType *RT = dyn_cast<RecordType>(this)) {
435 if (RT->getDecl()->isStruct())
439 // If the canonical form of this type isn't the right kind, reject it.
440 if (const RecordType *RT = dyn_cast<RecordType>(CanonicalType)) {
441 if (!RT->getDecl()->isStruct())
444 // If this is a typedef for a structure type, strip the typedef off without
445 // losing all typedef information.
446 return cast<RecordType>(getUnqualifiedDesugaredType());
451 const RecordType *Type::getAsUnionType() const {
452 // If this is directly a union type, return it.
453 if (const RecordType *RT = dyn_cast<RecordType>(this)) {
454 if (RT->getDecl()->isUnion())
458 // If the canonical form of this type isn't the right kind, reject it.
459 if (const RecordType *RT = dyn_cast<RecordType>(CanonicalType)) {
460 if (!RT->getDecl()->isUnion())
463 // If this is a typedef for a union type, strip the typedef off without
464 // losing all typedef information.
465 return cast<RecordType>(getUnqualifiedDesugaredType());
471 ObjCObjectType::ObjCObjectType(QualType Canonical, QualType Base,
472 ObjCProtocolDecl * const *Protocols,
473 unsigned NumProtocols)
474 : Type(ObjCObject, Canonical, false, false, false, false),
477 ObjCObjectTypeBits.NumProtocols = NumProtocols;
478 assert(getNumProtocols() == NumProtocols &&
479 "bitfield overflow in protocol count");
481 memcpy(getProtocolStorage(), Protocols,
482 NumProtocols * sizeof(ObjCProtocolDecl*));
485 const ObjCObjectType *Type::getAsObjCQualifiedInterfaceType() const {
486 // There is no sugar for ObjCObjectType's, just return the canonical
487 // type pointer if it is the right class. There is no typedef information to
488 // return and these cannot be Address-space qualified.
489 if (const ObjCObjectType *T = getAs<ObjCObjectType>())
490 if (T->getNumProtocols() && T->getInterface())
495 bool Type::isObjCQualifiedInterfaceType() const {
496 return getAsObjCQualifiedInterfaceType() != nullptr;
499 const ObjCObjectPointerType *Type::getAsObjCQualifiedIdType() const {
500 // There is no sugar for ObjCQualifiedIdType's, just return the canonical
501 // type pointer if it is the right class.
502 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) {
503 if (OPT->isObjCQualifiedIdType())
509 const ObjCObjectPointerType *Type::getAsObjCQualifiedClassType() const {
510 // There is no sugar for ObjCQualifiedClassType's, just return the canonical
511 // type pointer if it is the right class.
512 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) {
513 if (OPT->isObjCQualifiedClassType())
519 const ObjCObjectPointerType *Type::getAsObjCInterfacePointerType() const {
520 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) {
521 if (OPT->getInterfaceType())
527 const CXXRecordDecl *Type::getPointeeCXXRecordDecl() const {
528 QualType PointeeType;
529 if (const PointerType *PT = getAs<PointerType>())
530 PointeeType = PT->getPointeeType();
531 else if (const ReferenceType *RT = getAs<ReferenceType>())
532 PointeeType = RT->getPointeeType();
536 if (const RecordType *RT = PointeeType->getAs<RecordType>())
537 return dyn_cast<CXXRecordDecl>(RT->getDecl());
542 CXXRecordDecl *Type::getAsCXXRecordDecl() const {
543 if (const RecordType *RT = getAs<RecordType>())
544 return dyn_cast<CXXRecordDecl>(RT->getDecl());
545 else if (const InjectedClassNameType *Injected
546 = getAs<InjectedClassNameType>())
547 return Injected->getDecl();
553 class GetContainedAutoVisitor :
554 public TypeVisitor<GetContainedAutoVisitor, AutoType*> {
556 using TypeVisitor<GetContainedAutoVisitor, AutoType*>::Visit;
557 AutoType *Visit(QualType T) {
560 return Visit(T.getTypePtr());
563 // The 'auto' type itself.
564 AutoType *VisitAutoType(const AutoType *AT) {
565 return const_cast<AutoType*>(AT);
568 // Only these types can contain the desired 'auto' type.
569 AutoType *VisitPointerType(const PointerType *T) {
570 return Visit(T->getPointeeType());
572 AutoType *VisitBlockPointerType(const BlockPointerType *T) {
573 return Visit(T->getPointeeType());
575 AutoType *VisitReferenceType(const ReferenceType *T) {
576 return Visit(T->getPointeeTypeAsWritten());
578 AutoType *VisitMemberPointerType(const MemberPointerType *T) {
579 return Visit(T->getPointeeType());
581 AutoType *VisitArrayType(const ArrayType *T) {
582 return Visit(T->getElementType());
584 AutoType *VisitDependentSizedExtVectorType(
585 const DependentSizedExtVectorType *T) {
586 return Visit(T->getElementType());
588 AutoType *VisitVectorType(const VectorType *T) {
589 return Visit(T->getElementType());
591 AutoType *VisitFunctionType(const FunctionType *T) {
592 return Visit(T->getReturnType());
594 AutoType *VisitParenType(const ParenType *T) {
595 return Visit(T->getInnerType());
597 AutoType *VisitAttributedType(const AttributedType *T) {
598 return Visit(T->getModifiedType());
600 AutoType *VisitAdjustedType(const AdjustedType *T) {
601 return Visit(T->getOriginalType());
606 AutoType *Type::getContainedAutoType() const {
607 return GetContainedAutoVisitor().Visit(this);
610 bool Type::hasIntegerRepresentation() const {
611 if (const VectorType *VT = dyn_cast<VectorType>(CanonicalType))
612 return VT->getElementType()->isIntegerType();
614 return isIntegerType();
617 /// \brief Determine whether this type is an integral type.
619 /// This routine determines whether the given type is an integral type per
620 /// C++ [basic.fundamental]p7. Although the C standard does not define the
621 /// term "integral type", it has a similar term "integer type", and in C++
622 /// the two terms are equivalent. However, C's "integer type" includes
623 /// enumeration types, while C++'s "integer type" does not. The \c ASTContext
624 /// parameter is used to determine whether we should be following the C or
625 /// C++ rules when determining whether this type is an integral/integer type.
627 /// For cases where C permits "an integer type" and C++ permits "an integral
628 /// type", use this routine.
630 /// For cases where C permits "an integer type" and C++ permits "an integral
631 /// or enumeration type", use \c isIntegralOrEnumerationType() instead.
633 /// \param Ctx The context in which this type occurs.
635 /// \returns true if the type is considered an integral type, false otherwise.
636 bool Type::isIntegralType(ASTContext &Ctx) const {
637 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType))
638 return BT->getKind() >= BuiltinType::Bool &&
639 BT->getKind() <= BuiltinType::Int128;
641 if (!Ctx.getLangOpts().CPlusPlus)
642 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType))
643 return ET->getDecl()->isComplete(); // Complete enum types are integral in C.
649 bool Type::isIntegralOrUnscopedEnumerationType() const {
650 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType))
651 return BT->getKind() >= BuiltinType::Bool &&
652 BT->getKind() <= BuiltinType::Int128;
654 // Check for a complete enum type; incomplete enum types are not properly an
655 // enumeration type in the sense required here.
656 // C++0x: However, if the underlying type of the enum is fixed, it is
657 // considered complete.
658 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType))
659 return ET->getDecl()->isComplete() && !ET->getDecl()->isScoped();
666 bool Type::isCharType() const {
667 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType))
668 return BT->getKind() == BuiltinType::Char_U ||
669 BT->getKind() == BuiltinType::UChar ||
670 BT->getKind() == BuiltinType::Char_S ||
671 BT->getKind() == BuiltinType::SChar;
675 bool Type::isWideCharType() const {
676 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType))
677 return BT->getKind() == BuiltinType::WChar_S ||
678 BT->getKind() == BuiltinType::WChar_U;
682 bool Type::isChar16Type() const {
683 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType))
684 return BT->getKind() == BuiltinType::Char16;
688 bool Type::isChar32Type() const {
689 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType))
690 return BT->getKind() == BuiltinType::Char32;
694 /// \brief Determine whether this type is any of the built-in character
696 bool Type::isAnyCharacterType() const {
697 const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType);
698 if (!BT) return false;
699 switch (BT->getKind()) {
700 default: return false;
701 case BuiltinType::Char_U:
702 case BuiltinType::UChar:
703 case BuiltinType::WChar_U:
704 case BuiltinType::Char16:
705 case BuiltinType::Char32:
706 case BuiltinType::Char_S:
707 case BuiltinType::SChar:
708 case BuiltinType::WChar_S:
713 /// isSignedIntegerType - Return true if this is an integer type that is
714 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..],
715 /// an enum decl which has a signed representation
716 bool Type::isSignedIntegerType() const {
717 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) {
718 return BT->getKind() >= BuiltinType::Char_S &&
719 BT->getKind() <= BuiltinType::Int128;
722 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) {
723 // Incomplete enum types are not treated as integer types.
724 // FIXME: In C++, enum types are never integer types.
725 if (ET->getDecl()->isComplete() && !ET->getDecl()->isScoped())
726 return ET->getDecl()->getIntegerType()->isSignedIntegerType();
732 bool Type::isSignedIntegerOrEnumerationType() const {
733 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) {
734 return BT->getKind() >= BuiltinType::Char_S &&
735 BT->getKind() <= BuiltinType::Int128;
738 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) {
739 if (ET->getDecl()->isComplete())
740 return ET->getDecl()->getIntegerType()->isSignedIntegerType();
746 bool Type::hasSignedIntegerRepresentation() const {
747 if (const VectorType *VT = dyn_cast<VectorType>(CanonicalType))
748 return VT->getElementType()->isSignedIntegerOrEnumerationType();
750 return isSignedIntegerOrEnumerationType();
753 /// isUnsignedIntegerType - Return true if this is an integer type that is
754 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum
755 /// decl which has an unsigned representation
756 bool Type::isUnsignedIntegerType() const {
757 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) {
758 return BT->getKind() >= BuiltinType::Bool &&
759 BT->getKind() <= BuiltinType::UInt128;
762 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) {
763 // Incomplete enum types are not treated as integer types.
764 // FIXME: In C++, enum types are never integer types.
765 if (ET->getDecl()->isComplete() && !ET->getDecl()->isScoped())
766 return ET->getDecl()->getIntegerType()->isUnsignedIntegerType();
772 bool Type::isUnsignedIntegerOrEnumerationType() const {
773 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) {
774 return BT->getKind() >= BuiltinType::Bool &&
775 BT->getKind() <= BuiltinType::UInt128;
778 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) {
779 if (ET->getDecl()->isComplete())
780 return ET->getDecl()->getIntegerType()->isUnsignedIntegerType();
786 bool Type::hasUnsignedIntegerRepresentation() const {
787 if (const VectorType *VT = dyn_cast<VectorType>(CanonicalType))
788 return VT->getElementType()->isUnsignedIntegerOrEnumerationType();
790 return isUnsignedIntegerOrEnumerationType();
793 bool Type::isFloatingType() const {
794 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType))
795 return BT->getKind() >= BuiltinType::Half &&
796 BT->getKind() <= BuiltinType::LongDouble;
797 if (const ComplexType *CT = dyn_cast<ComplexType>(CanonicalType))
798 return CT->getElementType()->isFloatingType();
802 bool Type::hasFloatingRepresentation() const {
803 if (const VectorType *VT = dyn_cast<VectorType>(CanonicalType))
804 return VT->getElementType()->isFloatingType();
806 return isFloatingType();
809 bool Type::isRealFloatingType() const {
810 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType))
811 return BT->isFloatingPoint();
815 bool Type::isRealType() const {
816 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType))
817 return BT->getKind() >= BuiltinType::Bool &&
818 BT->getKind() <= BuiltinType::LongDouble;
819 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType))
820 return ET->getDecl()->isComplete() && !ET->getDecl()->isScoped();
824 bool Type::isArithmeticType() const {
825 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType))
826 return BT->getKind() >= BuiltinType::Bool &&
827 BT->getKind() <= BuiltinType::LongDouble;
828 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType))
829 // GCC allows forward declaration of enum types (forbid by C99 6.7.2.3p2).
830 // If a body isn't seen by the time we get here, return false.
832 // C++0x: Enumerations are not arithmetic types. For now, just return
833 // false for scoped enumerations since that will disable any
834 // unwanted implicit conversions.
835 return !ET->getDecl()->isScoped() && ET->getDecl()->isComplete();
836 return isa<ComplexType>(CanonicalType);
839 Type::ScalarTypeKind Type::getScalarTypeKind() const {
840 assert(isScalarType());
842 const Type *T = CanonicalType.getTypePtr();
843 if (const BuiltinType *BT = dyn_cast<BuiltinType>(T)) {
844 if (BT->getKind() == BuiltinType::Bool) return STK_Bool;
845 if (BT->getKind() == BuiltinType::NullPtr) return STK_CPointer;
846 if (BT->isInteger()) return STK_Integral;
847 if (BT->isFloatingPoint()) return STK_Floating;
848 llvm_unreachable("unknown scalar builtin type");
849 } else if (isa<PointerType>(T)) {
851 } else if (isa<BlockPointerType>(T)) {
852 return STK_BlockPointer;
853 } else if (isa<ObjCObjectPointerType>(T)) {
854 return STK_ObjCObjectPointer;
855 } else if (isa<MemberPointerType>(T)) {
856 return STK_MemberPointer;
857 } else if (isa<EnumType>(T)) {
858 assert(cast<EnumType>(T)->getDecl()->isComplete());
860 } else if (const ComplexType *CT = dyn_cast<ComplexType>(T)) {
861 if (CT->getElementType()->isRealFloatingType())
862 return STK_FloatingComplex;
863 return STK_IntegralComplex;
866 llvm_unreachable("unknown scalar type");
869 /// \brief Determines whether the type is a C++ aggregate type or C
870 /// aggregate or union type.
872 /// An aggregate type is an array or a class type (struct, union, or
873 /// class) that has no user-declared constructors, no private or
874 /// protected non-static data members, no base classes, and no virtual
875 /// functions (C++ [dcl.init.aggr]p1). The notion of an aggregate type
876 /// subsumes the notion of C aggregates (C99 6.2.5p21) because it also
877 /// includes union types.
878 bool Type::isAggregateType() const {
879 if (const RecordType *Record = dyn_cast<RecordType>(CanonicalType)) {
880 if (CXXRecordDecl *ClassDecl = dyn_cast<CXXRecordDecl>(Record->getDecl()))
881 return ClassDecl->isAggregate();
886 return isa<ArrayType>(CanonicalType);
889 /// isConstantSizeType - Return true if this is not a variable sized type,
890 /// according to the rules of C99 6.7.5p3. It is not legal to call this on
891 /// incomplete types or dependent types.
892 bool Type::isConstantSizeType() const {
893 assert(!isIncompleteType() && "This doesn't make sense for incomplete types");
894 assert(!isDependentType() && "This doesn't make sense for dependent types");
895 // The VAT must have a size, as it is known to be complete.
896 return !isa<VariableArrayType>(CanonicalType);
899 /// isIncompleteType - Return true if this is an incomplete type (C99 6.2.5p1)
900 /// - a type that can describe objects, but which lacks information needed to
901 /// determine its size.
902 bool Type::isIncompleteType(NamedDecl **Def) const {
906 switch (CanonicalType->getTypeClass()) {
907 default: return false;
909 // Void is the only incomplete builtin type. Per C99 6.2.5p19, it can never
913 EnumDecl *EnumD = cast<EnumType>(CanonicalType)->getDecl();
917 // An enumeration with fixed underlying type is complete (C++0x 7.2p3).
918 if (EnumD->isFixed())
921 return !EnumD->isCompleteDefinition();
924 // A tagged type (struct/union/enum/class) is incomplete if the decl is a
925 // forward declaration, but not a full definition (C99 6.2.5p22).
926 RecordDecl *Rec = cast<RecordType>(CanonicalType)->getDecl();
929 return !Rec->isCompleteDefinition();
932 // An array is incomplete if its element type is incomplete
933 // (C++ [dcl.array]p1).
934 // We don't handle variable arrays (they're not allowed in C++) or
935 // dependent-sized arrays (dependent types are never treated as incomplete).
936 return cast<ArrayType>(CanonicalType)->getElementType()
937 ->isIncompleteType(Def);
938 case IncompleteArray:
939 // An array of unknown size is an incomplete type (C99 6.2.5p22).
942 return cast<ObjCObjectType>(CanonicalType)->getBaseType()
943 ->isIncompleteType(Def);
944 case ObjCInterface: {
945 // ObjC interfaces are incomplete if they are @class, not @interface.
946 ObjCInterfaceDecl *Interface
947 = cast<ObjCInterfaceType>(CanonicalType)->getDecl();
950 return !Interface->hasDefinition();
955 bool QualType::isPODType(ASTContext &Context) const {
956 // C++11 has a more relaxed definition of POD.
957 if (Context.getLangOpts().CPlusPlus11)
958 return isCXX11PODType(Context);
960 return isCXX98PODType(Context);
963 bool QualType::isCXX98PODType(ASTContext &Context) const {
964 // The compiler shouldn't query this for incomplete types, but the user might.
965 // We return false for that case. Except for incomplete arrays of PODs, which
966 // are PODs according to the standard.
970 if ((*this)->isIncompleteArrayType())
971 return Context.getBaseElementType(*this).isCXX98PODType(Context);
973 if ((*this)->isIncompleteType())
976 if (Context.getLangOpts().ObjCAutoRefCount) {
977 switch (getObjCLifetime()) {
978 case Qualifiers::OCL_ExplicitNone:
981 case Qualifiers::OCL_Strong:
982 case Qualifiers::OCL_Weak:
983 case Qualifiers::OCL_Autoreleasing:
986 case Qualifiers::OCL_None:
991 QualType CanonicalType = getTypePtr()->CanonicalType;
992 switch (CanonicalType->getTypeClass()) {
993 // Everything not explicitly mentioned is not POD.
994 default: return false;
995 case Type::VariableArray:
996 case Type::ConstantArray:
997 // IncompleteArray is handled above.
998 return Context.getBaseElementType(*this).isCXX98PODType(Context);
1000 case Type::ObjCObjectPointer:
1001 case Type::BlockPointer:
1005 case Type::MemberPointer:
1007 case Type::ExtVector:
1014 if (CXXRecordDecl *ClassDecl
1015 = dyn_cast<CXXRecordDecl>(cast<RecordType>(CanonicalType)->getDecl()))
1016 return ClassDecl->isPOD();
1018 // C struct/union is POD.
1023 bool QualType::isTrivialType(ASTContext &Context) const {
1024 // The compiler shouldn't query this for incomplete types, but the user might.
1025 // We return false for that case. Except for incomplete arrays of PODs, which
1026 // are PODs according to the standard.
1030 if ((*this)->isArrayType())
1031 return Context.getBaseElementType(*this).isTrivialType(Context);
1033 // Return false for incomplete types after skipping any incomplete array
1034 // types which are expressly allowed by the standard and thus our API.
1035 if ((*this)->isIncompleteType())
1038 if (Context.getLangOpts().ObjCAutoRefCount) {
1039 switch (getObjCLifetime()) {
1040 case Qualifiers::OCL_ExplicitNone:
1043 case Qualifiers::OCL_Strong:
1044 case Qualifiers::OCL_Weak:
1045 case Qualifiers::OCL_Autoreleasing:
1048 case Qualifiers::OCL_None:
1049 if ((*this)->isObjCLifetimeType())
1055 QualType CanonicalType = getTypePtr()->CanonicalType;
1056 if (CanonicalType->isDependentType())
1059 // C++0x [basic.types]p9:
1060 // Scalar types, trivial class types, arrays of such types, and
1061 // cv-qualified versions of these types are collectively called trivial
1064 // As an extension, Clang treats vector types as Scalar types.
1065 if (CanonicalType->isScalarType() || CanonicalType->isVectorType())
1067 if (const RecordType *RT = CanonicalType->getAs<RecordType>()) {
1068 if (const CXXRecordDecl *ClassDecl =
1069 dyn_cast<CXXRecordDecl>(RT->getDecl())) {
1071 // A trivial class is a class that has a default constructor,
1072 // has no non-trivial default constructors, and is trivially
1074 return ClassDecl->hasDefaultConstructor() &&
1075 !ClassDecl->hasNonTrivialDefaultConstructor() &&
1076 ClassDecl->isTriviallyCopyable();
1082 // No other types can match.
1086 bool QualType::isTriviallyCopyableType(ASTContext &Context) const {
1087 if ((*this)->isArrayType())
1088 return Context.getBaseElementType(*this).isTrivialType(Context);
1090 if (Context.getLangOpts().ObjCAutoRefCount) {
1091 switch (getObjCLifetime()) {
1092 case Qualifiers::OCL_ExplicitNone:
1095 case Qualifiers::OCL_Strong:
1096 case Qualifiers::OCL_Weak:
1097 case Qualifiers::OCL_Autoreleasing:
1100 case Qualifiers::OCL_None:
1101 if ((*this)->isObjCLifetimeType())
1107 // C++11 [basic.types]p9
1108 // Scalar types, trivially copyable class types, arrays of such types, and
1109 // non-volatile const-qualified versions of these types are collectively
1110 // called trivially copyable types.
1112 QualType CanonicalType = getCanonicalType();
1113 if (CanonicalType->isDependentType())
1116 if (CanonicalType.isVolatileQualified())
1119 // Return false for incomplete types after skipping any incomplete array types
1120 // which are expressly allowed by the standard and thus our API.
1121 if (CanonicalType->isIncompleteType())
1124 // As an extension, Clang treats vector types as Scalar types.
1125 if (CanonicalType->isScalarType() || CanonicalType->isVectorType())
1128 if (const RecordType *RT = CanonicalType->getAs<RecordType>()) {
1129 if (const CXXRecordDecl *ClassDecl =
1130 dyn_cast<CXXRecordDecl>(RT->getDecl())) {
1131 if (!ClassDecl->isTriviallyCopyable()) return false;
1137 // No other types can match.
1143 bool Type::isLiteralType(const ASTContext &Ctx) const {
1144 if (isDependentType())
1147 // C++1y [basic.types]p10:
1148 // A type is a literal type if it is:
1150 if (Ctx.getLangOpts().CPlusPlus1y && isVoidType())
1153 // C++11 [basic.types]p10:
1154 // A type is a literal type if it is:
1156 // -- an array of literal type other than an array of runtime bound; or
1157 if (isVariableArrayType())
1159 const Type *BaseTy = getBaseElementTypeUnsafe();
1160 assert(BaseTy && "NULL element type");
1162 // Return false for incomplete types after skipping any incomplete array
1163 // types; those are expressly allowed by the standard and thus our API.
1164 if (BaseTy->isIncompleteType())
1167 // C++11 [basic.types]p10:
1168 // A type is a literal type if it is:
1169 // -- a scalar type; or
1170 // As an extension, Clang treats vector types and complex types as
1172 if (BaseTy->isScalarType() || BaseTy->isVectorType() ||
1173 BaseTy->isAnyComplexType())
1175 // -- a reference type; or
1176 if (BaseTy->isReferenceType())
1178 // -- a class type that has all of the following properties:
1179 if (const RecordType *RT = BaseTy->getAs<RecordType>()) {
1180 // -- a trivial destructor,
1181 // -- every constructor call and full-expression in the
1182 // brace-or-equal-initializers for non-static data members (if any)
1183 // is a constant expression,
1184 // -- it is an aggregate type or has at least one constexpr
1185 // constructor or constructor template that is not a copy or move
1187 // -- all non-static data members and base classes of literal types
1189 // We resolve DR1361 by ignoring the second bullet.
1190 if (const CXXRecordDecl *ClassDecl =
1191 dyn_cast<CXXRecordDecl>(RT->getDecl()))
1192 return ClassDecl->isLiteral();
1197 // We treat _Atomic T as a literal type if T is a literal type.
1198 if (const AtomicType *AT = BaseTy->getAs<AtomicType>())
1199 return AT->getValueType()->isLiteralType(Ctx);
1201 // If this type hasn't been deduced yet, then conservatively assume that
1202 // it'll work out to be a literal type.
1203 if (isa<AutoType>(BaseTy->getCanonicalTypeInternal()))
1209 bool Type::isStandardLayoutType() const {
1210 if (isDependentType())
1213 // C++0x [basic.types]p9:
1214 // Scalar types, standard-layout class types, arrays of such types, and
1215 // cv-qualified versions of these types are collectively called
1216 // standard-layout types.
1217 const Type *BaseTy = getBaseElementTypeUnsafe();
1218 assert(BaseTy && "NULL element type");
1220 // Return false for incomplete types after skipping any incomplete array
1221 // types which are expressly allowed by the standard and thus our API.
1222 if (BaseTy->isIncompleteType())
1225 // As an extension, Clang treats vector types as Scalar types.
1226 if (BaseTy->isScalarType() || BaseTy->isVectorType()) return true;
1227 if (const RecordType *RT = BaseTy->getAs<RecordType>()) {
1228 if (const CXXRecordDecl *ClassDecl =
1229 dyn_cast<CXXRecordDecl>(RT->getDecl()))
1230 if (!ClassDecl->isStandardLayout())
1233 // Default to 'true' for non-C++ class types.
1234 // FIXME: This is a bit dubious, but plain C structs should trivially meet
1235 // all the requirements of standard layout classes.
1239 // No other types can match.
1243 // This is effectively the intersection of isTrivialType and
1244 // isStandardLayoutType. We implement it directly to avoid redundant
1245 // conversions from a type to a CXXRecordDecl.
1246 bool QualType::isCXX11PODType(ASTContext &Context) const {
1247 const Type *ty = getTypePtr();
1248 if (ty->isDependentType())
1251 if (Context.getLangOpts().ObjCAutoRefCount) {
1252 switch (getObjCLifetime()) {
1253 case Qualifiers::OCL_ExplicitNone:
1256 case Qualifiers::OCL_Strong:
1257 case Qualifiers::OCL_Weak:
1258 case Qualifiers::OCL_Autoreleasing:
1261 case Qualifiers::OCL_None:
1266 // C++11 [basic.types]p9:
1267 // Scalar types, POD classes, arrays of such types, and cv-qualified
1268 // versions of these types are collectively called trivial types.
1269 const Type *BaseTy = ty->getBaseElementTypeUnsafe();
1270 assert(BaseTy && "NULL element type");
1272 // Return false for incomplete types after skipping any incomplete array
1273 // types which are expressly allowed by the standard and thus our API.
1274 if (BaseTy->isIncompleteType())
1277 // As an extension, Clang treats vector types as Scalar types.
1278 if (BaseTy->isScalarType() || BaseTy->isVectorType()) return true;
1279 if (const RecordType *RT = BaseTy->getAs<RecordType>()) {
1280 if (const CXXRecordDecl *ClassDecl =
1281 dyn_cast<CXXRecordDecl>(RT->getDecl())) {
1282 // C++11 [class]p10:
1283 // A POD struct is a non-union class that is both a trivial class [...]
1284 if (!ClassDecl->isTrivial()) return false;
1286 // C++11 [class]p10:
1287 // A POD struct is a non-union class that is both a trivial class and
1288 // a standard-layout class [...]
1289 if (!ClassDecl->isStandardLayout()) return false;
1291 // C++11 [class]p10:
1292 // A POD struct is a non-union class that is both a trivial class and
1293 // a standard-layout class, and has no non-static data members of type
1294 // non-POD struct, non-POD union (or array of such types). [...]
1296 // We don't directly query the recursive aspect as the requiremets for
1297 // both standard-layout classes and trivial classes apply recursively
1304 // No other types can match.
1308 bool Type::isPromotableIntegerType() const {
1309 if (const BuiltinType *BT = getAs<BuiltinType>())
1310 switch (BT->getKind()) {
1311 case BuiltinType::Bool:
1312 case BuiltinType::Char_S:
1313 case BuiltinType::Char_U:
1314 case BuiltinType::SChar:
1315 case BuiltinType::UChar:
1316 case BuiltinType::Short:
1317 case BuiltinType::UShort:
1318 case BuiltinType::WChar_S:
1319 case BuiltinType::WChar_U:
1320 case BuiltinType::Char16:
1321 case BuiltinType::Char32:
1327 // Enumerated types are promotable to their compatible integer types
1328 // (C99 6.3.1.1) a.k.a. its underlying type (C++ [conv.prom]p2).
1329 if (const EnumType *ET = getAs<EnumType>()){
1330 if (this->isDependentType() || ET->getDecl()->getPromotionType().isNull()
1331 || ET->getDecl()->isScoped())
1340 bool Type::isSpecifierType() const {
1341 // Note that this intentionally does not use the canonical type.
1342 switch (getTypeClass()) {
1350 case TemplateTypeParm:
1351 case SubstTemplateTypeParm:
1352 case TemplateSpecialization:
1355 case DependentTemplateSpecialization:
1358 case ObjCObjectPointer: // FIXME: object pointers aren't really specifiers
1365 ElaboratedTypeKeyword
1366 TypeWithKeyword::getKeywordForTypeSpec(unsigned TypeSpec) {
1368 default: return ETK_None;
1369 case TST_typename: return ETK_Typename;
1370 case TST_class: return ETK_Class;
1371 case TST_struct: return ETK_Struct;
1372 case TST_interface: return ETK_Interface;
1373 case TST_union: return ETK_Union;
1374 case TST_enum: return ETK_Enum;
1379 TypeWithKeyword::getTagTypeKindForTypeSpec(unsigned TypeSpec) {
1381 case TST_class: return TTK_Class;
1382 case TST_struct: return TTK_Struct;
1383 case TST_interface: return TTK_Interface;
1384 case TST_union: return TTK_Union;
1385 case TST_enum: return TTK_Enum;
1388 llvm_unreachable("Type specifier is not a tag type kind.");
1391 ElaboratedTypeKeyword
1392 TypeWithKeyword::getKeywordForTagTypeKind(TagTypeKind Kind) {
1394 case TTK_Class: return ETK_Class;
1395 case TTK_Struct: return ETK_Struct;
1396 case TTK_Interface: return ETK_Interface;
1397 case TTK_Union: return ETK_Union;
1398 case TTK_Enum: return ETK_Enum;
1400 llvm_unreachable("Unknown tag type kind.");
1404 TypeWithKeyword::getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword) {
1406 case ETK_Class: return TTK_Class;
1407 case ETK_Struct: return TTK_Struct;
1408 case ETK_Interface: return TTK_Interface;
1409 case ETK_Union: return TTK_Union;
1410 case ETK_Enum: return TTK_Enum;
1411 case ETK_None: // Fall through.
1413 llvm_unreachable("Elaborated type keyword is not a tag type kind.");
1415 llvm_unreachable("Unknown elaborated type keyword.");
1419 TypeWithKeyword::KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword) {
1431 llvm_unreachable("Unknown elaborated type keyword.");
1434 StringRef TypeWithKeyword::getKeywordName(ElaboratedTypeKeyword Keyword) {
1436 case ETK_None: return "";
1437 case ETK_Typename: return "typename";
1438 case ETK_Class: return "class";
1439 case ETK_Struct: return "struct";
1440 case ETK_Interface: return "__interface";
1441 case ETK_Union: return "union";
1442 case ETK_Enum: return "enum";
1445 llvm_unreachable("Unknown elaborated type keyword.");
1448 DependentTemplateSpecializationType::DependentTemplateSpecializationType(
1449 ElaboratedTypeKeyword Keyword,
1450 NestedNameSpecifier *NNS, const IdentifierInfo *Name,
1451 unsigned NumArgs, const TemplateArgument *Args,
1453 : TypeWithKeyword(Keyword, DependentTemplateSpecialization, Canon, true, true,
1454 /*VariablyModified=*/false,
1455 NNS && NNS->containsUnexpandedParameterPack()),
1456 NNS(NNS), Name(Name), NumArgs(NumArgs) {
1457 assert((!NNS || NNS->isDependent()) &&
1458 "DependentTemplateSpecializatonType requires dependent qualifier");
1459 for (unsigned I = 0; I != NumArgs; ++I) {
1460 if (Args[I].containsUnexpandedParameterPack())
1461 setContainsUnexpandedParameterPack();
1463 new (&getArgBuffer()[I]) TemplateArgument(Args[I]);
1468 DependentTemplateSpecializationType::Profile(llvm::FoldingSetNodeID &ID,
1469 const ASTContext &Context,
1470 ElaboratedTypeKeyword Keyword,
1471 NestedNameSpecifier *Qualifier,
1472 const IdentifierInfo *Name,
1474 const TemplateArgument *Args) {
1475 ID.AddInteger(Keyword);
1476 ID.AddPointer(Qualifier);
1477 ID.AddPointer(Name);
1478 for (unsigned Idx = 0; Idx < NumArgs; ++Idx)
1479 Args[Idx].Profile(ID, Context);
1482 bool Type::isElaboratedTypeSpecifier() const {
1483 ElaboratedTypeKeyword Keyword;
1484 if (const ElaboratedType *Elab = dyn_cast<ElaboratedType>(this))
1485 Keyword = Elab->getKeyword();
1486 else if (const DependentNameType *DepName = dyn_cast<DependentNameType>(this))
1487 Keyword = DepName->getKeyword();
1488 else if (const DependentTemplateSpecializationType *DepTST =
1489 dyn_cast<DependentTemplateSpecializationType>(this))
1490 Keyword = DepTST->getKeyword();
1494 return TypeWithKeyword::KeywordIsTagTypeKind(Keyword);
1497 const char *Type::getTypeClassName() const {
1498 switch (TypeBits.TC) {
1499 #define ABSTRACT_TYPE(Derived, Base)
1500 #define TYPE(Derived, Base) case Derived: return #Derived;
1501 #include "clang/AST/TypeNodes.def"
1504 llvm_unreachable("Invalid type class.");
1507 StringRef BuiltinType::getName(const PrintingPolicy &Policy) const {
1508 switch (getKind()) {
1509 case Void: return "void";
1510 case Bool: return Policy.Bool ? "bool" : "_Bool";
1511 case Char_S: return "char";
1512 case Char_U: return "char";
1513 case SChar: return "signed char";
1514 case Short: return "short";
1515 case Int: return "int";
1516 case Long: return "long";
1517 case LongLong: return "long long";
1518 case Int128: return "__int128";
1519 case UChar: return "unsigned char";
1520 case UShort: return "unsigned short";
1521 case UInt: return "unsigned int";
1522 case ULong: return "unsigned long";
1523 case ULongLong: return "unsigned long long";
1524 case UInt128: return "unsigned __int128";
1525 case Half: return Policy.Half ? "half" : "__fp16";
1526 case Float: return "float";
1527 case Double: return "double";
1528 case LongDouble: return "long double";
1530 case WChar_U: return Policy.MSWChar ? "__wchar_t" : "wchar_t";
1531 case Char16: return "char16_t";
1532 case Char32: return "char32_t";
1533 case NullPtr: return "nullptr_t";
1534 case Overload: return "<overloaded function type>";
1535 case BoundMember: return "<bound member function type>";
1536 case PseudoObject: return "<pseudo-object type>";
1537 case Dependent: return "<dependent type>";
1538 case UnknownAny: return "<unknown type>";
1539 case ARCUnbridgedCast: return "<ARC unbridged cast type>";
1540 case BuiltinFn: return "<builtin fn type>";
1541 case ObjCId: return "id";
1542 case ObjCClass: return "Class";
1543 case ObjCSel: return "SEL";
1544 case OCLImage1d: return "image1d_t";
1545 case OCLImage1dArray: return "image1d_array_t";
1546 case OCLImage1dBuffer: return "image1d_buffer_t";
1547 case OCLImage2d: return "image2d_t";
1548 case OCLImage2dArray: return "image2d_array_t";
1549 case OCLImage3d: return "image3d_t";
1550 case OCLSampler: return "sampler_t";
1551 case OCLEvent: return "event_t";
1554 llvm_unreachable("Invalid builtin type.");
1557 QualType QualType::getNonLValueExprType(const ASTContext &Context) const {
1558 if (const ReferenceType *RefType = getTypePtr()->getAs<ReferenceType>())
1559 return RefType->getPointeeType();
1561 // C++0x [basic.lval]:
1562 // Class prvalues can have cv-qualified types; non-class prvalues always
1563 // have cv-unqualified types.
1565 // See also C99 6.3.2.1p2.
1566 if (!Context.getLangOpts().CPlusPlus ||
1567 (!getTypePtr()->isDependentType() && !getTypePtr()->isRecordType()))
1568 return getUnqualifiedType();
1573 StringRef FunctionType::getNameForCallConv(CallingConv CC) {
1575 case CC_C: return "cdecl";
1576 case CC_X86StdCall: return "stdcall";
1577 case CC_X86FastCall: return "fastcall";
1578 case CC_X86ThisCall: return "thiscall";
1579 case CC_X86Pascal: return "pascal";
1580 case CC_X86_64Win64: return "ms_abi";
1581 case CC_X86_64SysV: return "sysv_abi";
1582 case CC_AAPCS: return "aapcs";
1583 case CC_AAPCS_VFP: return "aapcs-vfp";
1584 case CC_PnaclCall: return "pnaclcall";
1585 case CC_IntelOclBicc: return "intel_ocl_bicc";
1588 llvm_unreachable("Invalid calling convention.");
1591 FunctionProtoType::FunctionProtoType(QualType result, ArrayRef<QualType> params,
1593 const ExtProtoInfo &epi)
1594 : FunctionType(FunctionProto, result, epi.TypeQuals, canonical,
1595 result->isDependentType(),
1596 result->isInstantiationDependentType(),
1597 result->isVariablyModifiedType(),
1598 result->containsUnexpandedParameterPack(), epi.ExtInfo),
1599 NumParams(params.size()), NumExceptions(epi.NumExceptions),
1600 ExceptionSpecType(epi.ExceptionSpecType),
1601 HasAnyConsumedParams(epi.ConsumedParameters != nullptr),
1602 Variadic(epi.Variadic), HasTrailingReturn(epi.HasTrailingReturn),
1603 RefQualifier(epi.RefQualifier) {
1604 assert(NumParams == params.size() && "function has too many parameters");
1606 // Fill in the trailing argument array.
1607 QualType *argSlot = reinterpret_cast<QualType*>(this+1);
1608 for (unsigned i = 0; i != NumParams; ++i) {
1609 if (params[i]->isDependentType())
1611 else if (params[i]->isInstantiationDependentType())
1612 setInstantiationDependent();
1614 if (params[i]->containsUnexpandedParameterPack())
1615 setContainsUnexpandedParameterPack();
1617 argSlot[i] = params[i];
1620 if (getExceptionSpecType() == EST_Dynamic) {
1621 // Fill in the exception array.
1622 QualType *exnSlot = argSlot + NumParams;
1623 for (unsigned i = 0, e = epi.NumExceptions; i != e; ++i) {
1624 if (epi.Exceptions[i]->isDependentType())
1626 else if (epi.Exceptions[i]->isInstantiationDependentType())
1627 setInstantiationDependent();
1629 if (epi.Exceptions[i]->containsUnexpandedParameterPack())
1630 setContainsUnexpandedParameterPack();
1632 exnSlot[i] = epi.Exceptions[i];
1634 } else if (getExceptionSpecType() == EST_ComputedNoexcept) {
1635 // Store the noexcept expression and context.
1636 Expr **noexSlot = reinterpret_cast<Expr **>(argSlot + NumParams);
1637 *noexSlot = epi.NoexceptExpr;
1639 if (epi.NoexceptExpr) {
1640 if (epi.NoexceptExpr->isValueDependent()
1641 || epi.NoexceptExpr->isTypeDependent())
1643 else if (epi.NoexceptExpr->isInstantiationDependent())
1644 setInstantiationDependent();
1646 } else if (getExceptionSpecType() == EST_Uninstantiated) {
1647 // Store the function decl from which we will resolve our
1648 // exception specification.
1649 FunctionDecl **slot =
1650 reinterpret_cast<FunctionDecl **>(argSlot + NumParams);
1651 slot[0] = epi.ExceptionSpecDecl;
1652 slot[1] = epi.ExceptionSpecTemplate;
1653 // This exception specification doesn't make the type dependent, because
1654 // it's not instantiated as part of instantiating the type.
1655 } else if (getExceptionSpecType() == EST_Unevaluated) {
1656 // Store the function decl from which we will resolve our
1657 // exception specification.
1658 FunctionDecl **slot =
1659 reinterpret_cast<FunctionDecl **>(argSlot + NumParams);
1660 slot[0] = epi.ExceptionSpecDecl;
1663 if (epi.ConsumedParameters) {
1664 bool *consumedParams = const_cast<bool *>(getConsumedParamsBuffer());
1665 for (unsigned i = 0; i != NumParams; ++i)
1666 consumedParams[i] = epi.ConsumedParameters[i];
1670 FunctionProtoType::NoexceptResult
1671 FunctionProtoType::getNoexceptSpec(const ASTContext &ctx) const {
1672 ExceptionSpecificationType est = getExceptionSpecType();
1673 if (est == EST_BasicNoexcept)
1676 if (est != EST_ComputedNoexcept)
1677 return NR_NoNoexcept;
1679 Expr *noexceptExpr = getNoexceptExpr();
1681 return NR_BadNoexcept;
1682 if (noexceptExpr->isValueDependent())
1683 return NR_Dependent;
1686 bool isICE = noexceptExpr->isIntegerConstantExpr(value, ctx, nullptr,
1687 /*evaluated*/false);
1689 assert(isICE && "AST should not contain bad noexcept expressions.");
1691 return value.getBoolValue() ? NR_Nothrow : NR_Throw;
1694 bool FunctionProtoType::isNothrow(const ASTContext &Ctx,
1695 bool ResultIfDependent) const {
1696 ExceptionSpecificationType EST = getExceptionSpecType();
1697 assert(EST != EST_Unevaluated && EST != EST_Uninstantiated);
1698 if (EST == EST_DynamicNone || EST == EST_BasicNoexcept)
1701 if (EST == EST_Dynamic && ResultIfDependent == true) {
1702 // A dynamic exception specification is throwing unless every exception
1703 // type is an (unexpanded) pack expansion type.
1704 for (unsigned I = 0, N = NumExceptions; I != N; ++I)
1705 if (!getExceptionType(I)->getAs<PackExpansionType>())
1707 return ResultIfDependent;
1710 if (EST != EST_ComputedNoexcept)
1713 NoexceptResult NR = getNoexceptSpec(Ctx);
1714 if (NR == NR_Dependent)
1715 return ResultIfDependent;
1716 return NR == NR_Nothrow;
1719 bool FunctionProtoType::isTemplateVariadic() const {
1720 for (unsigned ArgIdx = getNumParams(); ArgIdx; --ArgIdx)
1721 if (isa<PackExpansionType>(getParamType(ArgIdx - 1)))
1727 void FunctionProtoType::Profile(llvm::FoldingSetNodeID &ID, QualType Result,
1728 const QualType *ArgTys, unsigned NumParams,
1729 const ExtProtoInfo &epi,
1730 const ASTContext &Context) {
1732 // We have to be careful not to get ambiguous profile encodings.
1733 // Note that valid type pointers are never ambiguous with anything else.
1735 // The encoding grammar begins:
1736 // type type* bool int bool
1737 // If that final bool is true, then there is a section for the EH spec:
1739 // This is followed by an optional "consumed argument" section of the
1740 // same length as the first type sequence:
1742 // Finally, we have the ext info and trailing return type flag:
1745 // There is no ambiguity between the consumed arguments and an empty EH
1746 // spec because of the leading 'bool' which unambiguously indicates
1747 // whether the following bool is the EH spec or part of the arguments.
1749 ID.AddPointer(Result.getAsOpaquePtr());
1750 for (unsigned i = 0; i != NumParams; ++i)
1751 ID.AddPointer(ArgTys[i].getAsOpaquePtr());
1752 // This method is relatively performance sensitive, so as a performance
1753 // shortcut, use one AddInteger call instead of four for the next four
1755 assert(!(unsigned(epi.Variadic) & ~1) &&
1756 !(unsigned(epi.TypeQuals) & ~255) &&
1757 !(unsigned(epi.RefQualifier) & ~3) &&
1758 !(unsigned(epi.ExceptionSpecType) & ~7) &&
1759 "Values larger than expected.");
1760 ID.AddInteger(unsigned(epi.Variadic) +
1761 (epi.TypeQuals << 1) +
1762 (epi.RefQualifier << 9) +
1763 (epi.ExceptionSpecType << 11));
1764 if (epi.ExceptionSpecType == EST_Dynamic) {
1765 for (unsigned i = 0; i != epi.NumExceptions; ++i)
1766 ID.AddPointer(epi.Exceptions[i].getAsOpaquePtr());
1767 } else if (epi.ExceptionSpecType == EST_ComputedNoexcept && epi.NoexceptExpr){
1768 epi.NoexceptExpr->Profile(ID, Context, false);
1769 } else if (epi.ExceptionSpecType == EST_Uninstantiated ||
1770 epi.ExceptionSpecType == EST_Unevaluated) {
1771 ID.AddPointer(epi.ExceptionSpecDecl->getCanonicalDecl());
1773 if (epi.ConsumedParameters) {
1774 for (unsigned i = 0; i != NumParams; ++i)
1775 ID.AddBoolean(epi.ConsumedParameters[i]);
1777 epi.ExtInfo.Profile(ID);
1778 ID.AddBoolean(epi.HasTrailingReturn);
1781 void FunctionProtoType::Profile(llvm::FoldingSetNodeID &ID,
1782 const ASTContext &Ctx) {
1783 Profile(ID, getReturnType(), param_type_begin(), NumParams, getExtProtoInfo(),
1787 QualType TypedefType::desugar() const {
1788 return getDecl()->getUnderlyingType();
1791 TypeOfExprType::TypeOfExprType(Expr *E, QualType can)
1792 : Type(TypeOfExpr, can, E->isTypeDependent(),
1793 E->isInstantiationDependent(),
1794 E->getType()->isVariablyModifiedType(),
1795 E->containsUnexpandedParameterPack()),
1799 bool TypeOfExprType::isSugared() const {
1800 return !TOExpr->isTypeDependent();
1803 QualType TypeOfExprType::desugar() const {
1805 return getUnderlyingExpr()->getType();
1807 return QualType(this, 0);
1810 void DependentTypeOfExprType::Profile(llvm::FoldingSetNodeID &ID,
1811 const ASTContext &Context, Expr *E) {
1812 E->Profile(ID, Context, true);
1815 DecltypeType::DecltypeType(Expr *E, QualType underlyingType, QualType can)
1816 // C++11 [temp.type]p2: "If an expression e involves a template parameter,
1817 // decltype(e) denotes a unique dependent type." Hence a decltype type is
1818 // type-dependent even if its expression is only instantiation-dependent.
1819 : Type(Decltype, can, E->isInstantiationDependent(),
1820 E->isInstantiationDependent(),
1821 E->getType()->isVariablyModifiedType(),
1822 E->containsUnexpandedParameterPack()),
1824 UnderlyingType(underlyingType) {
1827 bool DecltypeType::isSugared() const { return !E->isInstantiationDependent(); }
1829 QualType DecltypeType::desugar() const {
1831 return getUnderlyingType();
1833 return QualType(this, 0);
1836 DependentDecltypeType::DependentDecltypeType(const ASTContext &Context, Expr *E)
1837 : DecltypeType(E, Context.DependentTy), Context(Context) { }
1839 void DependentDecltypeType::Profile(llvm::FoldingSetNodeID &ID,
1840 const ASTContext &Context, Expr *E) {
1841 E->Profile(ID, Context, true);
1844 TagType::TagType(TypeClass TC, const TagDecl *D, QualType can)
1845 : Type(TC, can, D->isDependentType(),
1846 /*InstantiationDependent=*/D->isDependentType(),
1847 /*VariablyModified=*/false,
1848 /*ContainsUnexpandedParameterPack=*/false),
1849 decl(const_cast<TagDecl*>(D)) {}
1851 static TagDecl *getInterestingTagDecl(TagDecl *decl) {
1852 for (auto I : decl->redecls()) {
1853 if (I->isCompleteDefinition() || I->isBeingDefined())
1856 // If there's no definition (not even in progress), return what we have.
1860 UnaryTransformType::UnaryTransformType(QualType BaseType,
1861 QualType UnderlyingType,
1863 QualType CanonicalType)
1864 : Type(UnaryTransform, CanonicalType, UnderlyingType->isDependentType(),
1865 UnderlyingType->isInstantiationDependentType(),
1866 UnderlyingType->isVariablyModifiedType(),
1867 BaseType->containsUnexpandedParameterPack())
1868 , BaseType(BaseType), UnderlyingType(UnderlyingType), UKind(UKind)
1871 TagDecl *TagType::getDecl() const {
1872 return getInterestingTagDecl(decl);
1875 bool TagType::isBeingDefined() const {
1876 return getDecl()->isBeingDefined();
1879 bool AttributedType::isMSTypeSpec() const {
1880 switch (getAttrKind()) {
1881 default: return false;
1888 llvm_unreachable("invalid attr kind");
1891 bool AttributedType::isCallingConv() const {
1892 switch (getAttrKind()) {
1897 case attr_address_space:
1899 case attr_vector_size:
1900 case attr_neon_vector_type:
1901 case attr_neon_polyvector_type:
1903 case attr_objc_ownership:
1915 case attr_pnaclcall:
1916 case attr_inteloclbicc:
1919 llvm_unreachable("invalid attr kind");
1922 CXXRecordDecl *InjectedClassNameType::getDecl() const {
1923 return cast<CXXRecordDecl>(getInterestingTagDecl(Decl));
1926 IdentifierInfo *TemplateTypeParmType::getIdentifier() const {
1927 return isCanonicalUnqualified() ? nullptr : getDecl()->getIdentifier();
1930 SubstTemplateTypeParmPackType::
1931 SubstTemplateTypeParmPackType(const TemplateTypeParmType *Param,
1933 const TemplateArgument &ArgPack)
1934 : Type(SubstTemplateTypeParmPack, Canon, true, true, false, true),
1936 Arguments(ArgPack.pack_begin()), NumArguments(ArgPack.pack_size())
1940 TemplateArgument SubstTemplateTypeParmPackType::getArgumentPack() const {
1941 return TemplateArgument(Arguments, NumArguments);
1944 void SubstTemplateTypeParmPackType::Profile(llvm::FoldingSetNodeID &ID) {
1945 Profile(ID, getReplacedParameter(), getArgumentPack());
1948 void SubstTemplateTypeParmPackType::Profile(llvm::FoldingSetNodeID &ID,
1949 const TemplateTypeParmType *Replaced,
1950 const TemplateArgument &ArgPack) {
1951 ID.AddPointer(Replaced);
1952 ID.AddInteger(ArgPack.pack_size());
1953 for (const auto &P : ArgPack.pack_elements())
1954 ID.AddPointer(P.getAsType().getAsOpaquePtr());
1957 bool TemplateSpecializationType::
1958 anyDependentTemplateArguments(const TemplateArgumentListInfo &Args,
1959 bool &InstantiationDependent) {
1960 return anyDependentTemplateArguments(Args.getArgumentArray(), Args.size(),
1961 InstantiationDependent);
1964 bool TemplateSpecializationType::
1965 anyDependentTemplateArguments(const TemplateArgumentLoc *Args, unsigned N,
1966 bool &InstantiationDependent) {
1967 for (unsigned i = 0; i != N; ++i) {
1968 if (Args[i].getArgument().isDependent()) {
1969 InstantiationDependent = true;
1973 if (Args[i].getArgument().isInstantiationDependent())
1974 InstantiationDependent = true;
1981 anyDependentTemplateArguments(const TemplateArgument *Args, unsigned N,
1982 bool &InstantiationDependent) {
1983 for (unsigned i = 0; i != N; ++i) {
1984 if (Args[i].isDependent()) {
1985 InstantiationDependent = true;
1989 if (Args[i].isInstantiationDependent())
1990 InstantiationDependent = true;
1996 TemplateSpecializationType::
1997 TemplateSpecializationType(TemplateName T,
1998 const TemplateArgument *Args, unsigned NumArgs,
1999 QualType Canon, QualType AliasedType)
2000 : Type(TemplateSpecialization,
2001 Canon.isNull()? QualType(this, 0) : Canon,
2002 Canon.isNull()? T.isDependent() : Canon->isDependentType(),
2003 Canon.isNull()? T.isDependent()
2004 : Canon->isInstantiationDependentType(),
2006 T.containsUnexpandedParameterPack()),
2007 Template(T), NumArgs(NumArgs), TypeAlias(!AliasedType.isNull()) {
2008 assert(!T.getAsDependentTemplateName() &&
2009 "Use DependentTemplateSpecializationType for dependent template-name");
2010 assert((T.getKind() == TemplateName::Template ||
2011 T.getKind() == TemplateName::SubstTemplateTemplateParm ||
2012 T.getKind() == TemplateName::SubstTemplateTemplateParmPack) &&
2013 "Unexpected template name for TemplateSpecializationType");
2014 bool InstantiationDependent;
2015 (void)InstantiationDependent;
2016 assert((!Canon.isNull() ||
2018 ::anyDependentTemplateArguments(Args, NumArgs,
2019 InstantiationDependent)) &&
2020 "No canonical type for non-dependent class template specialization");
2022 TemplateArgument *TemplateArgs
2023 = reinterpret_cast<TemplateArgument *>(this + 1);
2024 for (unsigned Arg = 0; Arg < NumArgs; ++Arg) {
2025 // Update dependent and variably-modified bits.
2026 // If the canonical type exists and is non-dependent, the template
2027 // specialization type can be non-dependent even if one of the type
2028 // arguments is. Given:
2029 // template<typename T> using U = int;
2030 // U<T> is always non-dependent, irrespective of the type T.
2031 // However, U<Ts> contains an unexpanded parameter pack, even though
2032 // its expansion (and thus its desugared type) doesn't.
2033 if (Canon.isNull() && Args[Arg].isDependent())
2035 else if (Args[Arg].isInstantiationDependent())
2036 setInstantiationDependent();
2038 if (Args[Arg].getKind() == TemplateArgument::Type &&
2039 Args[Arg].getAsType()->isVariablyModifiedType())
2040 setVariablyModified();
2041 if (Args[Arg].containsUnexpandedParameterPack())
2042 setContainsUnexpandedParameterPack();
2044 new (&TemplateArgs[Arg]) TemplateArgument(Args[Arg]);
2047 // Store the aliased type if this is a type alias template specialization.
2049 TemplateArgument *Begin = reinterpret_cast<TemplateArgument *>(this + 1);
2050 *reinterpret_cast<QualType*>(Begin + getNumArgs()) = AliasedType;
2055 TemplateSpecializationType::Profile(llvm::FoldingSetNodeID &ID,
2057 const TemplateArgument *Args,
2059 const ASTContext &Context) {
2061 for (unsigned Idx = 0; Idx < NumArgs; ++Idx)
2062 Args[Idx].Profile(ID, Context);
2066 QualifierCollector::apply(const ASTContext &Context, QualType QT) const {
2067 if (!hasNonFastQualifiers())
2068 return QT.withFastQualifiers(getFastQualifiers());
2070 return Context.getQualifiedType(QT, *this);
2074 QualifierCollector::apply(const ASTContext &Context, const Type *T) const {
2075 if (!hasNonFastQualifiers())
2076 return QualType(T, getFastQualifiers());
2078 return Context.getQualifiedType(T, *this);
2081 void ObjCObjectTypeImpl::Profile(llvm::FoldingSetNodeID &ID,
2083 ObjCProtocolDecl * const *Protocols,
2084 unsigned NumProtocols) {
2085 ID.AddPointer(BaseType.getAsOpaquePtr());
2086 for (unsigned i = 0; i != NumProtocols; i++)
2087 ID.AddPointer(Protocols[i]);
2090 void ObjCObjectTypeImpl::Profile(llvm::FoldingSetNodeID &ID) {
2091 Profile(ID, getBaseType(), qual_begin(), getNumProtocols());
2096 /// \brief The cached properties of a type.
2097 class CachedProperties {
2102 CachedProperties(Linkage L, bool local) : L(L), local(local) {}
2104 Linkage getLinkage() const { return L; }
2105 bool hasLocalOrUnnamedType() const { return local; }
2107 friend CachedProperties merge(CachedProperties L, CachedProperties R) {
2108 Linkage MergedLinkage = minLinkage(L.L, R.L);
2109 return CachedProperties(MergedLinkage,
2110 L.hasLocalOrUnnamedType() | R.hasLocalOrUnnamedType());
2115 static CachedProperties computeCachedProperties(const Type *T);
2118 /// The type-property cache. This is templated so as to be
2119 /// instantiated at an internal type to prevent unnecessary symbol
2121 template <class Private> class TypePropertyCache {
2123 static CachedProperties get(QualType T) {
2124 return get(T.getTypePtr());
2127 static CachedProperties get(const Type *T) {
2129 return CachedProperties(T->TypeBits.getLinkage(),
2130 T->TypeBits.hasLocalOrUnnamedType());
2133 static void ensure(const Type *T) {
2134 // If the cache is valid, we're okay.
2135 if (T->TypeBits.isCacheValid()) return;
2137 // If this type is non-canonical, ask its canonical type for the
2138 // relevant information.
2139 if (!T->isCanonicalUnqualified()) {
2140 const Type *CT = T->getCanonicalTypeInternal().getTypePtr();
2142 T->TypeBits.CacheValid = true;
2143 T->TypeBits.CachedLinkage = CT->TypeBits.CachedLinkage;
2144 T->TypeBits.CachedLocalOrUnnamed = CT->TypeBits.CachedLocalOrUnnamed;
2148 // Compute the cached properties and then set the cache.
2149 CachedProperties Result = computeCachedProperties(T);
2150 T->TypeBits.CacheValid = true;
2151 T->TypeBits.CachedLinkage = Result.getLinkage();
2152 T->TypeBits.CachedLocalOrUnnamed = Result.hasLocalOrUnnamedType();
2157 // Instantiate the friend template at a private class. In a
2158 // reasonable implementation, these symbols will be internal.
2159 // It is terrible that this is the best way to accomplish this.
2160 namespace { class Private {}; }
2161 typedef TypePropertyCache<Private> Cache;
2163 static CachedProperties computeCachedProperties(const Type *T) {
2164 switch (T->getTypeClass()) {
2165 #define TYPE(Class,Base)
2166 #define NON_CANONICAL_TYPE(Class,Base) case Type::Class:
2167 #include "clang/AST/TypeNodes.def"
2168 llvm_unreachable("didn't expect a non-canonical type here");
2170 #define TYPE(Class,Base)
2171 #define DEPENDENT_TYPE(Class,Base) case Type::Class:
2172 #define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class,Base) case Type::Class:
2173 #include "clang/AST/TypeNodes.def"
2174 // Treat instantiation-dependent types as external.
2175 assert(T->isInstantiationDependentType());
2176 return CachedProperties(ExternalLinkage, false);
2179 // Give non-deduced 'auto' types external linkage. We should only see them
2180 // here in error recovery.
2181 return CachedProperties(ExternalLinkage, false);
2184 // C++ [basic.link]p8:
2185 // A type is said to have linkage if and only if:
2186 // - it is a fundamental type (3.9.1); or
2187 return CachedProperties(ExternalLinkage, false);
2191 const TagDecl *Tag = cast<TagType>(T)->getDecl();
2193 // C++ [basic.link]p8:
2194 // - it is a class or enumeration type that is named (or has a name
2195 // for linkage purposes (7.1.3)) and the name has linkage; or
2196 // - it is a specialization of a class template (14); or
2197 Linkage L = Tag->getLinkageInternal();
2198 bool IsLocalOrUnnamed =
2199 Tag->getDeclContext()->isFunctionOrMethod() ||
2200 !Tag->hasNameForLinkage();
2201 return CachedProperties(L, IsLocalOrUnnamed);
2204 // C++ [basic.link]p8:
2205 // - it is a compound type (3.9.2) other than a class or enumeration,
2206 // compounded exclusively from types that have linkage; or
2208 return Cache::get(cast<ComplexType>(T)->getElementType());
2210 return Cache::get(cast<PointerType>(T)->getPointeeType());
2211 case Type::BlockPointer:
2212 return Cache::get(cast<BlockPointerType>(T)->getPointeeType());
2213 case Type::LValueReference:
2214 case Type::RValueReference:
2215 return Cache::get(cast<ReferenceType>(T)->getPointeeType());
2216 case Type::MemberPointer: {
2217 const MemberPointerType *MPT = cast<MemberPointerType>(T);
2218 return merge(Cache::get(MPT->getClass()),
2219 Cache::get(MPT->getPointeeType()));
2221 case Type::ConstantArray:
2222 case Type::IncompleteArray:
2223 case Type::VariableArray:
2224 return Cache::get(cast<ArrayType>(T)->getElementType());
2226 case Type::ExtVector:
2227 return Cache::get(cast<VectorType>(T)->getElementType());
2228 case Type::FunctionNoProto:
2229 return Cache::get(cast<FunctionType>(T)->getReturnType());
2230 case Type::FunctionProto: {
2231 const FunctionProtoType *FPT = cast<FunctionProtoType>(T);
2232 CachedProperties result = Cache::get(FPT->getReturnType());
2233 for (const auto &ai : FPT->param_types())
2234 result = merge(result, Cache::get(ai));
2237 case Type::ObjCInterface: {
2238 Linkage L = cast<ObjCInterfaceType>(T)->getDecl()->getLinkageInternal();
2239 return CachedProperties(L, false);
2241 case Type::ObjCObject:
2242 return Cache::get(cast<ObjCObjectType>(T)->getBaseType());
2243 case Type::ObjCObjectPointer:
2244 return Cache::get(cast<ObjCObjectPointerType>(T)->getPointeeType());
2246 return Cache::get(cast<AtomicType>(T)->getValueType());
2249 llvm_unreachable("unhandled type class");
2252 /// \brief Determine the linkage of this type.
2253 Linkage Type::getLinkage() const {
2254 Cache::ensure(this);
2255 return TypeBits.getLinkage();
2258 bool Type::hasUnnamedOrLocalType() const {
2259 Cache::ensure(this);
2260 return TypeBits.hasLocalOrUnnamedType();
2263 static LinkageInfo computeLinkageInfo(QualType T);
2265 static LinkageInfo computeLinkageInfo(const Type *T) {
2266 switch (T->getTypeClass()) {
2267 #define TYPE(Class,Base)
2268 #define NON_CANONICAL_TYPE(Class,Base) case Type::Class:
2269 #include "clang/AST/TypeNodes.def"
2270 llvm_unreachable("didn't expect a non-canonical type here");
2272 #define TYPE(Class,Base)
2273 #define DEPENDENT_TYPE(Class,Base) case Type::Class:
2274 #define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class,Base) case Type::Class:
2275 #include "clang/AST/TypeNodes.def"
2276 // Treat instantiation-dependent types as external.
2277 assert(T->isInstantiationDependentType());
2278 return LinkageInfo::external();
2281 return LinkageInfo::external();
2284 return LinkageInfo::external();
2288 return cast<TagType>(T)->getDecl()->getLinkageAndVisibility();
2291 return computeLinkageInfo(cast<ComplexType>(T)->getElementType());
2293 return computeLinkageInfo(cast<PointerType>(T)->getPointeeType());
2294 case Type::BlockPointer:
2295 return computeLinkageInfo(cast<BlockPointerType>(T)->getPointeeType());
2296 case Type::LValueReference:
2297 case Type::RValueReference:
2298 return computeLinkageInfo(cast<ReferenceType>(T)->getPointeeType());
2299 case Type::MemberPointer: {
2300 const MemberPointerType *MPT = cast<MemberPointerType>(T);
2301 LinkageInfo LV = computeLinkageInfo(MPT->getClass());
2302 LV.merge(computeLinkageInfo(MPT->getPointeeType()));
2305 case Type::ConstantArray:
2306 case Type::IncompleteArray:
2307 case Type::VariableArray:
2308 return computeLinkageInfo(cast<ArrayType>(T)->getElementType());
2310 case Type::ExtVector:
2311 return computeLinkageInfo(cast<VectorType>(T)->getElementType());
2312 case Type::FunctionNoProto:
2313 return computeLinkageInfo(cast<FunctionType>(T)->getReturnType());
2314 case Type::FunctionProto: {
2315 const FunctionProtoType *FPT = cast<FunctionProtoType>(T);
2316 LinkageInfo LV = computeLinkageInfo(FPT->getReturnType());
2317 for (const auto &ai : FPT->param_types())
2318 LV.merge(computeLinkageInfo(ai));
2321 case Type::ObjCInterface:
2322 return cast<ObjCInterfaceType>(T)->getDecl()->getLinkageAndVisibility();
2323 case Type::ObjCObject:
2324 return computeLinkageInfo(cast<ObjCObjectType>(T)->getBaseType());
2325 case Type::ObjCObjectPointer:
2326 return computeLinkageInfo(cast<ObjCObjectPointerType>(T)->getPointeeType());
2328 return computeLinkageInfo(cast<AtomicType>(T)->getValueType());
2331 llvm_unreachable("unhandled type class");
2334 static LinkageInfo computeLinkageInfo(QualType T) {
2335 return computeLinkageInfo(T.getTypePtr());
2338 bool Type::isLinkageValid() const {
2339 if (!TypeBits.isCacheValid())
2342 return computeLinkageInfo(getCanonicalTypeInternal()).getLinkage() ==
2343 TypeBits.getLinkage();
2346 LinkageInfo Type::getLinkageAndVisibility() const {
2347 if (!isCanonicalUnqualified())
2348 return computeLinkageInfo(getCanonicalTypeInternal());
2350 LinkageInfo LV = computeLinkageInfo(this);
2351 assert(LV.getLinkage() == getLinkage());
2355 Qualifiers::ObjCLifetime Type::getObjCARCImplicitLifetime() const {
2356 if (isObjCARCImplicitlyUnretainedType())
2357 return Qualifiers::OCL_ExplicitNone;
2358 return Qualifiers::OCL_Strong;
2361 bool Type::isObjCARCImplicitlyUnretainedType() const {
2362 assert(isObjCLifetimeType() &&
2363 "cannot query implicit lifetime for non-inferrable type");
2365 const Type *canon = getCanonicalTypeInternal().getTypePtr();
2367 // Walk down to the base type. We don't care about qualifiers for this.
2368 while (const ArrayType *array = dyn_cast<ArrayType>(canon))
2369 canon = array->getElementType().getTypePtr();
2371 if (const ObjCObjectPointerType *opt
2372 = dyn_cast<ObjCObjectPointerType>(canon)) {
2373 // Class and Class<Protocol> don't require retension.
2374 if (opt->getObjectType()->isObjCClass())
2381 bool Type::isObjCNSObjectType() const {
2382 if (const TypedefType *typedefType = dyn_cast<TypedefType>(this))
2383 return typedefType->getDecl()->hasAttr<ObjCNSObjectAttr>();
2386 bool Type::isObjCRetainableType() const {
2387 return isObjCObjectPointerType() ||
2388 isBlockPointerType() ||
2389 isObjCNSObjectType();
2391 bool Type::isObjCIndirectLifetimeType() const {
2392 if (isObjCLifetimeType())
2394 if (const PointerType *OPT = getAs<PointerType>())
2395 return OPT->getPointeeType()->isObjCIndirectLifetimeType();
2396 if (const ReferenceType *Ref = getAs<ReferenceType>())
2397 return Ref->getPointeeType()->isObjCIndirectLifetimeType();
2398 if (const MemberPointerType *MemPtr = getAs<MemberPointerType>())
2399 return MemPtr->getPointeeType()->isObjCIndirectLifetimeType();
2403 /// Returns true if objects of this type have lifetime semantics under
2405 bool Type::isObjCLifetimeType() const {
2406 const Type *type = this;
2407 while (const ArrayType *array = type->getAsArrayTypeUnsafe())
2408 type = array->getElementType().getTypePtr();
2409 return type->isObjCRetainableType();
2412 /// \brief Determine whether the given type T is a "bridgable" Objective-C type,
2413 /// which is either an Objective-C object pointer type or an
2414 bool Type::isObjCARCBridgableType() const {
2415 return isObjCObjectPointerType() || isBlockPointerType();
2418 /// \brief Determine whether the given type T is a "bridgeable" C type.
2419 bool Type::isCARCBridgableType() const {
2420 const PointerType *Pointer = getAs<PointerType>();
2424 QualType Pointee = Pointer->getPointeeType();
2425 return Pointee->isVoidType() || Pointee->isRecordType();
2428 bool Type::hasSizedVLAType() const {
2429 if (!isVariablyModifiedType()) return false;
2431 if (const PointerType *ptr = getAs<PointerType>())
2432 return ptr->getPointeeType()->hasSizedVLAType();
2433 if (const ReferenceType *ref = getAs<ReferenceType>())
2434 return ref->getPointeeType()->hasSizedVLAType();
2435 if (const ArrayType *arr = getAsArrayTypeUnsafe()) {
2436 if (isa<VariableArrayType>(arr) &&
2437 cast<VariableArrayType>(arr)->getSizeExpr())
2440 return arr->getElementType()->hasSizedVLAType();
2446 QualType::DestructionKind QualType::isDestructedTypeImpl(QualType type) {
2447 switch (type.getObjCLifetime()) {
2448 case Qualifiers::OCL_None:
2449 case Qualifiers::OCL_ExplicitNone:
2450 case Qualifiers::OCL_Autoreleasing:
2453 case Qualifiers::OCL_Strong:
2454 return DK_objc_strong_lifetime;
2455 case Qualifiers::OCL_Weak:
2456 return DK_objc_weak_lifetime;
2459 /// Currently, the only destruction kind we recognize is C++ objects
2460 /// with non-trivial destructors.
2461 const CXXRecordDecl *record =
2462 type->getBaseElementTypeUnsafe()->getAsCXXRecordDecl();
2463 if (record && record->hasDefinition() && !record->hasTrivialDestructor())
2464 return DK_cxx_destructor;
2469 CXXRecordDecl *MemberPointerType::getMostRecentCXXRecordDecl() const {
2470 return getClass()->getAsCXXRecordDecl()->getMostRecentDecl();