Type.cpp revision 3026348bd4c13a0f83b59839f64065e0fcbea253
1//===--- Type.cpp - Type representation and manipulation ------------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file implements type-related functionality. 11// 12//===----------------------------------------------------------------------===// 13 14#include "clang/AST/ASTContext.h" 15#include "clang/AST/CharUnits.h" 16#include "clang/AST/Type.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/TypeVisitor.h" 23#include "clang/Basic/Specifiers.h" 24#include "llvm/ADT/APSInt.h" 25#include "llvm/ADT/StringExtras.h" 26#include "llvm/Support/raw_ostream.h" 27#include <algorithm> 28using namespace clang; 29 30bool Qualifiers::isStrictSupersetOf(Qualifiers Other) const { 31 return (*this != Other) && 32 // CVR qualifiers superset 33 (((Mask & CVRMask) | (Other.Mask & CVRMask)) == (Mask & CVRMask)) && 34 // ObjC GC qualifiers superset 35 ((getObjCGCAttr() == Other.getObjCGCAttr()) || 36 (hasObjCGCAttr() && !Other.hasObjCGCAttr())) && 37 // Address space superset. 38 ((getAddressSpace() == Other.getAddressSpace()) || 39 (hasAddressSpace()&& !Other.hasAddressSpace())) && 40 // Lifetime qualifier superset. 41 ((getObjCLifetime() == Other.getObjCLifetime()) || 42 (hasObjCLifetime() && !Other.hasObjCLifetime())); 43} 44 45const IdentifierInfo* QualType::getBaseTypeIdentifier() const { 46 const Type* ty = getTypePtr(); 47 NamedDecl *ND = NULL; 48 if (ty->isPointerType() || ty->isReferenceType()) 49 return ty->getPointeeType().getBaseTypeIdentifier(); 50 else if (ty->isRecordType()) 51 ND = ty->getAs<RecordType>()->getDecl(); 52 else if (ty->isEnumeralType()) 53 ND = ty->getAs<EnumType>()->getDecl(); 54 else if (ty->getTypeClass() == Type::Typedef) 55 ND = ty->getAs<TypedefType>()->getDecl(); 56 else if (ty->isArrayType()) 57 return ty->castAsArrayTypeUnsafe()-> 58 getElementType().getBaseTypeIdentifier(); 59 60 if (ND) 61 return ND->getIdentifier(); 62 return NULL; 63} 64 65bool QualType::isConstant(QualType T, ASTContext &Ctx) { 66 if (T.isConstQualified()) 67 return true; 68 69 if (const ArrayType *AT = Ctx.getAsArrayType(T)) 70 return AT->getElementType().isConstant(Ctx); 71 72 return false; 73} 74 75unsigned ConstantArrayType::getNumAddressingBits(ASTContext &Context, 76 QualType ElementType, 77 const llvm::APInt &NumElements) { 78 llvm::APSInt SizeExtended(NumElements, true); 79 unsigned SizeTypeBits = Context.getTypeSize(Context.getSizeType()); 80 SizeExtended = SizeExtended.extend(std::max(SizeTypeBits, 81 SizeExtended.getBitWidth()) * 2); 82 83 uint64_t ElementSize 84 = Context.getTypeSizeInChars(ElementType).getQuantity(); 85 llvm::APSInt TotalSize(llvm::APInt(SizeExtended.getBitWidth(), ElementSize)); 86 TotalSize *= SizeExtended; 87 88 return TotalSize.getActiveBits(); 89} 90 91unsigned ConstantArrayType::getMaxSizeBits(ASTContext &Context) { 92 unsigned Bits = Context.getTypeSize(Context.getSizeType()); 93 94 // GCC appears to only allow 63 bits worth of address space when compiling 95 // for 64-bit, so we do the same. 96 if (Bits == 64) 97 --Bits; 98 99 return Bits; 100} 101 102DependentSizedArrayType::DependentSizedArrayType(const ASTContext &Context, 103 QualType et, QualType can, 104 Expr *e, ArraySizeModifier sm, 105 unsigned tq, 106 SourceRange brackets) 107 : ArrayType(DependentSizedArray, et, can, sm, tq, 108 (et->containsUnexpandedParameterPack() || 109 (e && e->containsUnexpandedParameterPack()))), 110 Context(Context), SizeExpr((Stmt*) e), Brackets(brackets) 111{ 112} 113 114void DependentSizedArrayType::Profile(llvm::FoldingSetNodeID &ID, 115 const ASTContext &Context, 116 QualType ET, 117 ArraySizeModifier SizeMod, 118 unsigned TypeQuals, 119 Expr *E) { 120 ID.AddPointer(ET.getAsOpaquePtr()); 121 ID.AddInteger(SizeMod); 122 ID.AddInteger(TypeQuals); 123 E->Profile(ID, Context, true); 124} 125 126DependentSizedExtVectorType::DependentSizedExtVectorType(const 127 ASTContext &Context, 128 QualType ElementType, 129 QualType can, 130 Expr *SizeExpr, 131 SourceLocation loc) 132 : Type(DependentSizedExtVector, can, /*Dependent=*/true, 133 /*InstantiationDependent=*/true, 134 ElementType->isVariablyModifiedType(), 135 (ElementType->containsUnexpandedParameterPack() || 136 (SizeExpr && SizeExpr->containsUnexpandedParameterPack()))), 137 Context(Context), SizeExpr(SizeExpr), ElementType(ElementType), 138 loc(loc) 139{ 140} 141 142void 143DependentSizedExtVectorType::Profile(llvm::FoldingSetNodeID &ID, 144 const ASTContext &Context, 145 QualType ElementType, Expr *SizeExpr) { 146 ID.AddPointer(ElementType.getAsOpaquePtr()); 147 SizeExpr->Profile(ID, Context, true); 148} 149 150VectorType::VectorType(QualType vecType, unsigned nElements, QualType canonType, 151 VectorKind vecKind) 152 : Type(Vector, canonType, vecType->isDependentType(), 153 vecType->isInstantiationDependentType(), 154 vecType->isVariablyModifiedType(), 155 vecType->containsUnexpandedParameterPack()), 156 ElementType(vecType) 157{ 158 VectorTypeBits.VecKind = vecKind; 159 VectorTypeBits.NumElements = nElements; 160} 161 162VectorType::VectorType(TypeClass tc, QualType vecType, unsigned nElements, 163 QualType canonType, VectorKind vecKind) 164 : Type(tc, canonType, vecType->isDependentType(), 165 vecType->isInstantiationDependentType(), 166 vecType->isVariablyModifiedType(), 167 vecType->containsUnexpandedParameterPack()), 168 ElementType(vecType) 169{ 170 VectorTypeBits.VecKind = vecKind; 171 VectorTypeBits.NumElements = nElements; 172} 173 174/// getArrayElementTypeNoTypeQual - If this is an array type, return the 175/// element type of the array, potentially with type qualifiers missing. 176/// This method should never be used when type qualifiers are meaningful. 177const Type *Type::getArrayElementTypeNoTypeQual() const { 178 // If this is directly an array type, return it. 179 if (const ArrayType *ATy = dyn_cast<ArrayType>(this)) 180 return ATy->getElementType().getTypePtr(); 181 182 // If the canonical form of this type isn't the right kind, reject it. 183 if (!isa<ArrayType>(CanonicalType)) 184 return 0; 185 186 // If this is a typedef for an array type, strip the typedef off without 187 // losing all typedef information. 188 return cast<ArrayType>(getUnqualifiedDesugaredType()) 189 ->getElementType().getTypePtr(); 190} 191 192/// getDesugaredType - Return the specified type with any "sugar" removed from 193/// the type. This takes off typedefs, typeof's etc. If the outer level of 194/// the type is already concrete, it returns it unmodified. This is similar 195/// to getting the canonical type, but it doesn't remove *all* typedefs. For 196/// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 197/// concrete. 198QualType QualType::getDesugaredType(QualType T, const ASTContext &Context) { 199 SplitQualType split = getSplitDesugaredType(T); 200 return Context.getQualifiedType(split.first, split.second); 201} 202 203QualType QualType::getSingleStepDesugaredType(const ASTContext &Context) const { 204 QualifierCollector Qs; 205 206 const Type *CurTy = Qs.strip(*this); 207 switch (CurTy->getTypeClass()) { 208#define ABSTRACT_TYPE(Class, Parent) 209#define TYPE(Class, Parent) \ 210 case Type::Class: { \ 211 const Class##Type *Ty = cast<Class##Type>(CurTy); \ 212 if (!Ty->isSugared()) \ 213 return *this; \ 214 return Context.getQualifiedType(Ty->desugar(), Qs); \ 215 break; \ 216 } 217#include "clang/AST/TypeNodes.def" 218 } 219 220 return *this; 221} 222 223SplitQualType QualType::getSplitDesugaredType(QualType T) { 224 QualifierCollector Qs; 225 226 QualType Cur = T; 227 while (true) { 228 const Type *CurTy = Qs.strip(Cur); 229 switch (CurTy->getTypeClass()) { 230#define ABSTRACT_TYPE(Class, Parent) 231#define TYPE(Class, Parent) \ 232 case Type::Class: { \ 233 const Class##Type *Ty = cast<Class##Type>(CurTy); \ 234 if (!Ty->isSugared()) \ 235 return SplitQualType(Ty, Qs); \ 236 Cur = Ty->desugar(); \ 237 break; \ 238 } 239#include "clang/AST/TypeNodes.def" 240 } 241 } 242} 243 244SplitQualType QualType::getSplitUnqualifiedTypeImpl(QualType type) { 245 SplitQualType split = type.split(); 246 247 // All the qualifiers we've seen so far. 248 Qualifiers quals = split.second; 249 250 // The last type node we saw with any nodes inside it. 251 const Type *lastTypeWithQuals = split.first; 252 253 while (true) { 254 QualType next; 255 256 // Do a single-step desugar, aborting the loop if the type isn't 257 // sugared. 258 switch (split.first->getTypeClass()) { 259#define ABSTRACT_TYPE(Class, Parent) 260#define TYPE(Class, Parent) \ 261 case Type::Class: { \ 262 const Class##Type *ty = cast<Class##Type>(split.first); \ 263 if (!ty->isSugared()) goto done; \ 264 next = ty->desugar(); \ 265 break; \ 266 } 267#include "clang/AST/TypeNodes.def" 268 } 269 270 // Otherwise, split the underlying type. If that yields qualifiers, 271 // update the information. 272 split = next.split(); 273 if (!split.second.empty()) { 274 lastTypeWithQuals = split.first; 275 quals.addConsistentQualifiers(split.second); 276 } 277 } 278 279 done: 280 return SplitQualType(lastTypeWithQuals, quals); 281} 282 283QualType QualType::IgnoreParens(QualType T) { 284 // FIXME: this seems inherently un-qualifiers-safe. 285 while (const ParenType *PT = T->getAs<ParenType>()) 286 T = PT->getInnerType(); 287 return T; 288} 289 290/// getUnqualifiedDesugaredType - Pull any qualifiers and syntactic 291/// sugar off the given type. This should produce an object of the 292/// same dynamic type as the canonical type. 293const Type *Type::getUnqualifiedDesugaredType() const { 294 const Type *Cur = this; 295 296 while (true) { 297 switch (Cur->getTypeClass()) { 298#define ABSTRACT_TYPE(Class, Parent) 299#define TYPE(Class, Parent) \ 300 case Class: { \ 301 const Class##Type *Ty = cast<Class##Type>(Cur); \ 302 if (!Ty->isSugared()) return Cur; \ 303 Cur = Ty->desugar().getTypePtr(); \ 304 break; \ 305 } 306#include "clang/AST/TypeNodes.def" 307 } 308 } 309} 310 311/// isVoidType - Helper method to determine if this is the 'void' type. 312bool Type::isVoidType() const { 313 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 314 return BT->getKind() == BuiltinType::Void; 315 return false; 316} 317 318bool Type::isDerivedType() const { 319 switch (CanonicalType->getTypeClass()) { 320 case Pointer: 321 case VariableArray: 322 case ConstantArray: 323 case IncompleteArray: 324 case FunctionProto: 325 case FunctionNoProto: 326 case LValueReference: 327 case RValueReference: 328 case Record: 329 return true; 330 default: 331 return false; 332 } 333} 334bool Type::isClassType() const { 335 if (const RecordType *RT = getAs<RecordType>()) 336 return RT->getDecl()->isClass(); 337 return false; 338} 339bool Type::isStructureType() const { 340 if (const RecordType *RT = getAs<RecordType>()) 341 return RT->getDecl()->isStruct(); 342 return false; 343} 344bool Type::isStructureOrClassType() const { 345 if (const RecordType *RT = getAs<RecordType>()) 346 return RT->getDecl()->isStruct() || RT->getDecl()->isClass(); 347 return false; 348} 349bool Type::isVoidPointerType() const { 350 if (const PointerType *PT = getAs<PointerType>()) 351 return PT->getPointeeType()->isVoidType(); 352 return false; 353} 354 355bool Type::isUnionType() const { 356 if (const RecordType *RT = getAs<RecordType>()) 357 return RT->getDecl()->isUnion(); 358 return false; 359} 360 361bool Type::isComplexType() const { 362 if (const ComplexType *CT = dyn_cast<ComplexType>(CanonicalType)) 363 return CT->getElementType()->isFloatingType(); 364 return false; 365} 366 367bool Type::isComplexIntegerType() const { 368 // Check for GCC complex integer extension. 369 return getAsComplexIntegerType(); 370} 371 372const ComplexType *Type::getAsComplexIntegerType() const { 373 if (const ComplexType *Complex = getAs<ComplexType>()) 374 if (Complex->getElementType()->isIntegerType()) 375 return Complex; 376 return 0; 377} 378 379QualType Type::getPointeeType() const { 380 if (const PointerType *PT = getAs<PointerType>()) 381 return PT->getPointeeType(); 382 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 383 return OPT->getPointeeType(); 384 if (const BlockPointerType *BPT = getAs<BlockPointerType>()) 385 return BPT->getPointeeType(); 386 if (const ReferenceType *RT = getAs<ReferenceType>()) 387 return RT->getPointeeType(); 388 return QualType(); 389} 390 391const RecordType *Type::getAsStructureType() const { 392 // If this is directly a structure type, return it. 393 if (const RecordType *RT = dyn_cast<RecordType>(this)) { 394 if (RT->getDecl()->isStruct()) 395 return RT; 396 } 397 398 // If the canonical form of this type isn't the right kind, reject it. 399 if (const RecordType *RT = dyn_cast<RecordType>(CanonicalType)) { 400 if (!RT->getDecl()->isStruct()) 401 return 0; 402 403 // If this is a typedef for a structure type, strip the typedef off without 404 // losing all typedef information. 405 return cast<RecordType>(getUnqualifiedDesugaredType()); 406 } 407 return 0; 408} 409 410const RecordType *Type::getAsUnionType() const { 411 // If this is directly a union type, return it. 412 if (const RecordType *RT = dyn_cast<RecordType>(this)) { 413 if (RT->getDecl()->isUnion()) 414 return RT; 415 } 416 417 // If the canonical form of this type isn't the right kind, reject it. 418 if (const RecordType *RT = dyn_cast<RecordType>(CanonicalType)) { 419 if (!RT->getDecl()->isUnion()) 420 return 0; 421 422 // If this is a typedef for a union type, strip the typedef off without 423 // losing all typedef information. 424 return cast<RecordType>(getUnqualifiedDesugaredType()); 425 } 426 427 return 0; 428} 429 430ObjCObjectType::ObjCObjectType(QualType Canonical, QualType Base, 431 ObjCProtocolDecl * const *Protocols, 432 unsigned NumProtocols) 433 : Type(ObjCObject, Canonical, false, false, false, false), 434 BaseType(Base) 435{ 436 ObjCObjectTypeBits.NumProtocols = NumProtocols; 437 assert(getNumProtocols() == NumProtocols && 438 "bitfield overflow in protocol count"); 439 if (NumProtocols) 440 memcpy(getProtocolStorage(), Protocols, 441 NumProtocols * sizeof(ObjCProtocolDecl*)); 442} 443 444const ObjCObjectType *Type::getAsObjCQualifiedInterfaceType() const { 445 // There is no sugar for ObjCObjectType's, just return the canonical 446 // type pointer if it is the right class. There is no typedef information to 447 // return and these cannot be Address-space qualified. 448 if (const ObjCObjectType *T = getAs<ObjCObjectType>()) 449 if (T->getNumProtocols() && T->getInterface()) 450 return T; 451 return 0; 452} 453 454bool Type::isObjCQualifiedInterfaceType() const { 455 return getAsObjCQualifiedInterfaceType() != 0; 456} 457 458const ObjCObjectPointerType *Type::getAsObjCQualifiedIdType() const { 459 // There is no sugar for ObjCQualifiedIdType's, just return the canonical 460 // type pointer if it is the right class. 461 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) { 462 if (OPT->isObjCQualifiedIdType()) 463 return OPT; 464 } 465 return 0; 466} 467 468const ObjCObjectPointerType *Type::getAsObjCQualifiedClassType() const { 469 // There is no sugar for ObjCQualifiedClassType's, just return the canonical 470 // type pointer if it is the right class. 471 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) { 472 if (OPT->isObjCQualifiedClassType()) 473 return OPT; 474 } 475 return 0; 476} 477 478const ObjCObjectPointerType *Type::getAsObjCInterfacePointerType() const { 479 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) { 480 if (OPT->getInterfaceType()) 481 return OPT; 482 } 483 return 0; 484} 485 486const CXXRecordDecl *Type::getCXXRecordDeclForPointerType() const { 487 if (const PointerType *PT = getAs<PointerType>()) 488 if (const RecordType *RT = PT->getPointeeType()->getAs<RecordType>()) 489 return dyn_cast<CXXRecordDecl>(RT->getDecl()); 490 return 0; 491} 492 493CXXRecordDecl *Type::getAsCXXRecordDecl() const { 494 if (const RecordType *RT = getAs<RecordType>()) 495 return dyn_cast<CXXRecordDecl>(RT->getDecl()); 496 else if (const InjectedClassNameType *Injected 497 = getAs<InjectedClassNameType>()) 498 return Injected->getDecl(); 499 500 return 0; 501} 502 503namespace { 504 class GetContainedAutoVisitor : 505 public TypeVisitor<GetContainedAutoVisitor, AutoType*> { 506 public: 507 using TypeVisitor<GetContainedAutoVisitor, AutoType*>::Visit; 508 AutoType *Visit(QualType T) { 509 if (T.isNull()) 510 return 0; 511 return Visit(T.getTypePtr()); 512 } 513 514 // The 'auto' type itself. 515 AutoType *VisitAutoType(const AutoType *AT) { 516 return const_cast<AutoType*>(AT); 517 } 518 519 // Only these types can contain the desired 'auto' type. 520 AutoType *VisitPointerType(const PointerType *T) { 521 return Visit(T->getPointeeType()); 522 } 523 AutoType *VisitBlockPointerType(const BlockPointerType *T) { 524 return Visit(T->getPointeeType()); 525 } 526 AutoType *VisitReferenceType(const ReferenceType *T) { 527 return Visit(T->getPointeeTypeAsWritten()); 528 } 529 AutoType *VisitMemberPointerType(const MemberPointerType *T) { 530 return Visit(T->getPointeeType()); 531 } 532 AutoType *VisitArrayType(const ArrayType *T) { 533 return Visit(T->getElementType()); 534 } 535 AutoType *VisitDependentSizedExtVectorType( 536 const DependentSizedExtVectorType *T) { 537 return Visit(T->getElementType()); 538 } 539 AutoType *VisitVectorType(const VectorType *T) { 540 return Visit(T->getElementType()); 541 } 542 AutoType *VisitFunctionType(const FunctionType *T) { 543 return Visit(T->getResultType()); 544 } 545 AutoType *VisitParenType(const ParenType *T) { 546 return Visit(T->getInnerType()); 547 } 548 AutoType *VisitAttributedType(const AttributedType *T) { 549 return Visit(T->getModifiedType()); 550 } 551 }; 552} 553 554AutoType *Type::getContainedAutoType() const { 555 return GetContainedAutoVisitor().Visit(this); 556} 557 558bool Type::isIntegerType() const { 559 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 560 return BT->getKind() >= BuiltinType::Bool && 561 BT->getKind() <= BuiltinType::Int128; 562 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) 563 // Incomplete enum types are not treated as integer types. 564 // FIXME: In C++, enum types are never integer types. 565 return ET->getDecl()->isComplete() && !ET->getDecl()->isScoped(); 566 return false; 567} 568 569bool Type::hasIntegerRepresentation() const { 570 if (const VectorType *VT = dyn_cast<VectorType>(CanonicalType)) 571 return VT->getElementType()->isIntegerType(); 572 else 573 return isIntegerType(); 574} 575 576/// \brief Determine whether this type is an integral type. 577/// 578/// This routine determines whether the given type is an integral type per 579/// C++ [basic.fundamental]p7. Although the C standard does not define the 580/// term "integral type", it has a similar term "integer type", and in C++ 581/// the two terms are equivalent. However, C's "integer type" includes 582/// enumeration types, while C++'s "integer type" does not. The \c ASTContext 583/// parameter is used to determine whether we should be following the C or 584/// C++ rules when determining whether this type is an integral/integer type. 585/// 586/// For cases where C permits "an integer type" and C++ permits "an integral 587/// type", use this routine. 588/// 589/// For cases where C permits "an integer type" and C++ permits "an integral 590/// or enumeration type", use \c isIntegralOrEnumerationType() instead. 591/// 592/// \param Ctx The context in which this type occurs. 593/// 594/// \returns true if the type is considered an integral type, false otherwise. 595bool Type::isIntegralType(ASTContext &Ctx) const { 596 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 597 return BT->getKind() >= BuiltinType::Bool && 598 BT->getKind() <= BuiltinType::Int128; 599 600 if (!Ctx.getLangOptions().CPlusPlus) 601 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) 602 return ET->getDecl()->isComplete(); // Complete enum types are integral in C. 603 604 return false; 605} 606 607bool Type::isIntegralOrEnumerationType() const { 608 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 609 return BT->getKind() >= BuiltinType::Bool && 610 BT->getKind() <= BuiltinType::Int128; 611 612 // Check for a complete enum type; incomplete enum types are not properly an 613 // enumeration type in the sense required here. 614 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) 615 return ET->getDecl()->isComplete(); 616 617 return false; 618} 619 620bool Type::isIntegralOrUnscopedEnumerationType() const { 621 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 622 return BT->getKind() >= BuiltinType::Bool && 623 BT->getKind() <= BuiltinType::Int128; 624 625 // Check for a complete enum type; incomplete enum types are not properly an 626 // enumeration type in the sense required here. 627 // C++0x: However, if the underlying type of the enum is fixed, it is 628 // considered complete. 629 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) 630 return ET->getDecl()->isComplete() && !ET->getDecl()->isScoped(); 631 632 return false; 633} 634 635 636bool Type::isBooleanType() const { 637 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 638 return BT->getKind() == BuiltinType::Bool; 639 return false; 640} 641 642bool Type::isCharType() const { 643 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 644 return BT->getKind() == BuiltinType::Char_U || 645 BT->getKind() == BuiltinType::UChar || 646 BT->getKind() == BuiltinType::Char_S || 647 BT->getKind() == BuiltinType::SChar; 648 return false; 649} 650 651bool Type::isWideCharType() const { 652 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 653 return BT->getKind() == BuiltinType::WChar_S || 654 BT->getKind() == BuiltinType::WChar_U; 655 return false; 656} 657 658bool Type::isChar16Type() const { 659 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 660 return BT->getKind() == BuiltinType::Char16; 661 return false; 662} 663 664bool Type::isChar32Type() const { 665 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 666 return BT->getKind() == BuiltinType::Char32; 667 return false; 668} 669 670/// \brief Determine whether this type is any of the built-in character 671/// types. 672bool Type::isAnyCharacterType() const { 673 const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType); 674 if (BT == 0) return false; 675 switch (BT->getKind()) { 676 default: return false; 677 case BuiltinType::Char_U: 678 case BuiltinType::UChar: 679 case BuiltinType::WChar_U: 680 case BuiltinType::Char16: 681 case BuiltinType::Char32: 682 case BuiltinType::Char_S: 683 case BuiltinType::SChar: 684 case BuiltinType::WChar_S: 685 return true; 686 } 687} 688 689/// isSignedIntegerType - Return true if this is an integer type that is 690/// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 691/// an enum decl which has a signed representation 692bool Type::isSignedIntegerType() const { 693 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) { 694 return BT->getKind() >= BuiltinType::Char_S && 695 BT->getKind() <= BuiltinType::Int128; 696 } 697 698 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) { 699 // Incomplete enum types are not treated as integer types. 700 // FIXME: In C++, enum types are never integer types. 701 if (ET->getDecl()->isComplete() && !ET->getDecl()->isScoped()) 702 return ET->getDecl()->getIntegerType()->isSignedIntegerType(); 703 } 704 705 return false; 706} 707 708bool Type::isSignedIntegerOrEnumerationType() const { 709 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) { 710 return BT->getKind() >= BuiltinType::Char_S && 711 BT->getKind() <= BuiltinType::Int128; 712 } 713 714 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) { 715 if (ET->getDecl()->isComplete()) 716 return ET->getDecl()->getIntegerType()->isSignedIntegerType(); 717 } 718 719 return false; 720} 721 722bool Type::hasSignedIntegerRepresentation() const { 723 if (const VectorType *VT = dyn_cast<VectorType>(CanonicalType)) 724 return VT->getElementType()->isSignedIntegerType(); 725 else 726 return isSignedIntegerType(); 727} 728 729/// isUnsignedIntegerType - Return true if this is an integer type that is 730/// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 731/// decl which has an unsigned representation 732bool Type::isUnsignedIntegerType() const { 733 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) { 734 return BT->getKind() >= BuiltinType::Bool && 735 BT->getKind() <= BuiltinType::UInt128; 736 } 737 738 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) { 739 // Incomplete enum types are not treated as integer types. 740 // FIXME: In C++, enum types are never integer types. 741 if (ET->getDecl()->isComplete() && !ET->getDecl()->isScoped()) 742 return ET->getDecl()->getIntegerType()->isUnsignedIntegerType(); 743 } 744 745 return false; 746} 747 748bool Type::isUnsignedIntegerOrEnumerationType() const { 749 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) { 750 return BT->getKind() >= BuiltinType::Bool && 751 BT->getKind() <= BuiltinType::UInt128; 752 } 753 754 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) { 755 if (ET->getDecl()->isComplete()) 756 return ET->getDecl()->getIntegerType()->isUnsignedIntegerType(); 757 } 758 759 return false; 760} 761 762bool Type::hasUnsignedIntegerRepresentation() const { 763 if (const VectorType *VT = dyn_cast<VectorType>(CanonicalType)) 764 return VT->getElementType()->isUnsignedIntegerType(); 765 else 766 return isUnsignedIntegerType(); 767} 768 769bool Type::isHalfType() const { 770 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 771 return BT->getKind() == BuiltinType::Half; 772 // FIXME: Should we allow complex __fp16? Probably not. 773 return false; 774} 775 776bool Type::isFloatingType() const { 777 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 778 return BT->getKind() >= BuiltinType::Half && 779 BT->getKind() <= BuiltinType::LongDouble; 780 if (const ComplexType *CT = dyn_cast<ComplexType>(CanonicalType)) 781 return CT->getElementType()->isFloatingType(); 782 return false; 783} 784 785bool Type::hasFloatingRepresentation() const { 786 if (const VectorType *VT = dyn_cast<VectorType>(CanonicalType)) 787 return VT->getElementType()->isFloatingType(); 788 else 789 return isFloatingType(); 790} 791 792bool Type::isRealFloatingType() const { 793 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 794 return BT->isFloatingPoint(); 795 return false; 796} 797 798bool Type::isRealType() const { 799 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 800 return BT->getKind() >= BuiltinType::Bool && 801 BT->getKind() <= BuiltinType::LongDouble; 802 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) 803 return ET->getDecl()->isComplete() && !ET->getDecl()->isScoped(); 804 return false; 805} 806 807bool Type::isArithmeticType() const { 808 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 809 return BT->getKind() >= BuiltinType::Bool && 810 BT->getKind() <= BuiltinType::LongDouble; 811 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) 812 // GCC allows forward declaration of enum types (forbid by C99 6.7.2.3p2). 813 // If a body isn't seen by the time we get here, return false. 814 // 815 // C++0x: Enumerations are not arithmetic types. For now, just return 816 // false for scoped enumerations since that will disable any 817 // unwanted implicit conversions. 818 return !ET->getDecl()->isScoped() && ET->getDecl()->isComplete(); 819 return isa<ComplexType>(CanonicalType); 820} 821 822bool Type::isScalarType() const { 823 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 824 return BT->getKind() > BuiltinType::Void && 825 BT->getKind() <= BuiltinType::NullPtr; 826 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) 827 // Enums are scalar types, but only if they are defined. Incomplete enums 828 // are not treated as scalar types. 829 return ET->getDecl()->isComplete(); 830 return isa<PointerType>(CanonicalType) || 831 isa<BlockPointerType>(CanonicalType) || 832 isa<MemberPointerType>(CanonicalType) || 833 isa<ComplexType>(CanonicalType) || 834 isa<ObjCObjectPointerType>(CanonicalType); 835} 836 837Type::ScalarTypeKind Type::getScalarTypeKind() const { 838 assert(isScalarType()); 839 840 const Type *T = CanonicalType.getTypePtr(); 841 if (const BuiltinType *BT = dyn_cast<BuiltinType>(T)) { 842 if (BT->getKind() == BuiltinType::Bool) return STK_Bool; 843 if (BT->getKind() == BuiltinType::NullPtr) return STK_CPointer; 844 if (BT->isInteger()) return STK_Integral; 845 if (BT->isFloatingPoint()) return STK_Floating; 846 llvm_unreachable("unknown scalar builtin type"); 847 } else if (isa<PointerType>(T)) { 848 return STK_CPointer; 849 } else if (isa<BlockPointerType>(T)) { 850 return STK_BlockPointer; 851 } else if (isa<ObjCObjectPointerType>(T)) { 852 return STK_ObjCObjectPointer; 853 } else if (isa<MemberPointerType>(T)) { 854 return STK_MemberPointer; 855 } else if (isa<EnumType>(T)) { 856 assert(cast<EnumType>(T)->getDecl()->isComplete()); 857 return STK_Integral; 858 } else if (const ComplexType *CT = dyn_cast<ComplexType>(T)) { 859 if (CT->getElementType()->isRealFloatingType()) 860 return STK_FloatingComplex; 861 return STK_IntegralComplex; 862 } 863 864 llvm_unreachable("unknown scalar type"); 865} 866 867/// \brief Determines whether the type is a C++ aggregate type or C 868/// aggregate or union type. 869/// 870/// An aggregate type is an array or a class type (struct, union, or 871/// class) that has no user-declared constructors, no private or 872/// protected non-static data members, no base classes, and no virtual 873/// functions (C++ [dcl.init.aggr]p1). The notion of an aggregate type 874/// subsumes the notion of C aggregates (C99 6.2.5p21) because it also 875/// includes union types. 876bool Type::isAggregateType() const { 877 if (const RecordType *Record = dyn_cast<RecordType>(CanonicalType)) { 878 if (CXXRecordDecl *ClassDecl = dyn_cast<CXXRecordDecl>(Record->getDecl())) 879 return ClassDecl->isAggregate(); 880 881 return true; 882 } 883 884 return isa<ArrayType>(CanonicalType); 885} 886 887/// isConstantSizeType - Return true if this is not a variable sized type, 888/// according to the rules of C99 6.7.5p3. It is not legal to call this on 889/// incomplete types or dependent types. 890bool Type::isConstantSizeType() const { 891 assert(!isIncompleteType() && "This doesn't make sense for incomplete types"); 892 assert(!isDependentType() && "This doesn't make sense for dependent types"); 893 // The VAT must have a size, as it is known to be complete. 894 return !isa<VariableArrayType>(CanonicalType); 895} 896 897/// isIncompleteType - Return true if this is an incomplete type (C99 6.2.5p1) 898/// - a type that can describe objects, but which lacks information needed to 899/// determine its size. 900bool Type::isIncompleteType(NamedDecl **Def) const { 901 if (Def) 902 *Def = 0; 903 904 switch (CanonicalType->getTypeClass()) { 905 default: return false; 906 case Builtin: 907 // Void is the only incomplete builtin type. Per C99 6.2.5p19, it can never 908 // be completed. 909 return isVoidType(); 910 case Enum: { 911 EnumDecl *EnumD = cast<EnumType>(CanonicalType)->getDecl(); 912 if (Def) 913 *Def = EnumD; 914 915 // An enumeration with fixed underlying type is complete (C++0x 7.2p3). 916 if (EnumD->isFixed()) 917 return false; 918 919 return !EnumD->isCompleteDefinition(); 920 } 921 case Record: { 922 // A tagged type (struct/union/enum/class) is incomplete if the decl is a 923 // forward declaration, but not a full definition (C99 6.2.5p22). 924 RecordDecl *Rec = cast<RecordType>(CanonicalType)->getDecl(); 925 if (Def) 926 *Def = Rec; 927 return !Rec->isCompleteDefinition(); 928 } 929 case ConstantArray: 930 // An array is incomplete if its element type is incomplete 931 // (C++ [dcl.array]p1). 932 // We don't handle variable arrays (they're not allowed in C++) or 933 // dependent-sized arrays (dependent types are never treated as incomplete). 934 return cast<ArrayType>(CanonicalType)->getElementType() 935 ->isIncompleteType(Def); 936 case IncompleteArray: 937 // An array of unknown size is an incomplete type (C99 6.2.5p22). 938 return true; 939 case ObjCObject: 940 return cast<ObjCObjectType>(CanonicalType)->getBaseType() 941 ->isIncompleteType(Def); 942 case ObjCInterface: { 943 // ObjC interfaces are incomplete if they are @class, not @interface. 944 ObjCInterfaceDecl *Interface 945 = cast<ObjCInterfaceType>(CanonicalType)->getDecl(); 946 if (Def) 947 *Def = Interface; 948 return !Interface->hasDefinition(); 949 } 950 } 951} 952 953bool QualType::isPODType(ASTContext &Context) const { 954 // The compiler shouldn't query this for incomplete types, but the user might. 955 // We return false for that case. Except for incomplete arrays of PODs, which 956 // are PODs according to the standard. 957 if (isNull()) 958 return 0; 959 960 if ((*this)->isIncompleteArrayType()) 961 return Context.getBaseElementType(*this).isPODType(Context); 962 963 if ((*this)->isIncompleteType()) 964 return false; 965 966 if (Context.getLangOptions().ObjCAutoRefCount) { 967 switch (getObjCLifetime()) { 968 case Qualifiers::OCL_ExplicitNone: 969 return true; 970 971 case Qualifiers::OCL_Strong: 972 case Qualifiers::OCL_Weak: 973 case Qualifiers::OCL_Autoreleasing: 974 return false; 975 976 case Qualifiers::OCL_None: 977 break; 978 } 979 } 980 981 QualType CanonicalType = getTypePtr()->CanonicalType; 982 switch (CanonicalType->getTypeClass()) { 983 // Everything not explicitly mentioned is not POD. 984 default: return false; 985 case Type::VariableArray: 986 case Type::ConstantArray: 987 // IncompleteArray is handled above. 988 return Context.getBaseElementType(*this).isPODType(Context); 989 990 case Type::ObjCObjectPointer: 991 case Type::BlockPointer: 992 case Type::Builtin: 993 case Type::Complex: 994 case Type::Pointer: 995 case Type::MemberPointer: 996 case Type::Vector: 997 case Type::ExtVector: 998 return true; 999 1000 case Type::Enum: 1001 return true; 1002 1003 case Type::Record: 1004 if (CXXRecordDecl *ClassDecl 1005 = dyn_cast<CXXRecordDecl>(cast<RecordType>(CanonicalType)->getDecl())) 1006 return ClassDecl->isPOD(); 1007 1008 // C struct/union is POD. 1009 return true; 1010 } 1011} 1012 1013bool QualType::isTrivialType(ASTContext &Context) const { 1014 // The compiler shouldn't query this for incomplete types, but the user might. 1015 // We return false for that case. Except for incomplete arrays of PODs, which 1016 // are PODs according to the standard. 1017 if (isNull()) 1018 return 0; 1019 1020 if ((*this)->isArrayType()) 1021 return Context.getBaseElementType(*this).isTrivialType(Context); 1022 1023 // Return false for incomplete types after skipping any incomplete array 1024 // types which are expressly allowed by the standard and thus our API. 1025 if ((*this)->isIncompleteType()) 1026 return false; 1027 1028 if (Context.getLangOptions().ObjCAutoRefCount) { 1029 switch (getObjCLifetime()) { 1030 case Qualifiers::OCL_ExplicitNone: 1031 return true; 1032 1033 case Qualifiers::OCL_Strong: 1034 case Qualifiers::OCL_Weak: 1035 case Qualifiers::OCL_Autoreleasing: 1036 return false; 1037 1038 case Qualifiers::OCL_None: 1039 if ((*this)->isObjCLifetimeType()) 1040 return false; 1041 break; 1042 } 1043 } 1044 1045 QualType CanonicalType = getTypePtr()->CanonicalType; 1046 if (CanonicalType->isDependentType()) 1047 return false; 1048 1049 // C++0x [basic.types]p9: 1050 // Scalar types, trivial class types, arrays of such types, and 1051 // cv-qualified versions of these types are collectively called trivial 1052 // types. 1053 1054 // As an extension, Clang treats vector types as Scalar types. 1055 if (CanonicalType->isScalarType() || CanonicalType->isVectorType()) 1056 return true; 1057 if (const RecordType *RT = CanonicalType->getAs<RecordType>()) { 1058 if (const CXXRecordDecl *ClassDecl = 1059 dyn_cast<CXXRecordDecl>(RT->getDecl())) { 1060 // C++0x [class]p5: 1061 // A trivial class is a class that has a trivial default constructor 1062 if (!ClassDecl->hasTrivialDefaultConstructor()) return false; 1063 // and is trivially copyable. 1064 if (!ClassDecl->isTriviallyCopyable()) return false; 1065 } 1066 1067 return true; 1068 } 1069 1070 // No other types can match. 1071 return false; 1072} 1073 1074bool QualType::isTriviallyCopyableType(ASTContext &Context) const { 1075 if ((*this)->isArrayType()) 1076 return Context.getBaseElementType(*this).isTrivialType(Context); 1077 1078 if (Context.getLangOptions().ObjCAutoRefCount) { 1079 switch (getObjCLifetime()) { 1080 case Qualifiers::OCL_ExplicitNone: 1081 return true; 1082 1083 case Qualifiers::OCL_Strong: 1084 case Qualifiers::OCL_Weak: 1085 case Qualifiers::OCL_Autoreleasing: 1086 return false; 1087 1088 case Qualifiers::OCL_None: 1089 if ((*this)->isObjCLifetimeType()) 1090 return false; 1091 break; 1092 } 1093 } 1094 1095 // C++0x [basic.types]p9 1096 // Scalar types, trivially copyable class types, arrays of such types, and 1097 // cv-qualified versions of these types are collectively called trivial 1098 // types. 1099 1100 QualType CanonicalType = getCanonicalType(); 1101 if (CanonicalType->isDependentType()) 1102 return false; 1103 1104 // Return false for incomplete types after skipping any incomplete array types 1105 // which are expressly allowed by the standard and thus our API. 1106 if (CanonicalType->isIncompleteType()) 1107 return false; 1108 1109 // As an extension, Clang treats vector types as Scalar types. 1110 if (CanonicalType->isScalarType() || CanonicalType->isVectorType()) 1111 return true; 1112 1113 if (const RecordType *RT = CanonicalType->getAs<RecordType>()) { 1114 if (const CXXRecordDecl *ClassDecl = 1115 dyn_cast<CXXRecordDecl>(RT->getDecl())) { 1116 if (!ClassDecl->isTriviallyCopyable()) return false; 1117 } 1118 1119 return true; 1120 } 1121 1122 // No other types can match. 1123 return false; 1124} 1125 1126 1127 1128bool Type::isLiteralType() const { 1129 if (isDependentType()) 1130 return false; 1131 1132 // C++0x [basic.types]p10: 1133 // A type is a literal type if it is: 1134 // [...] 1135 // -- an array of literal type. 1136 // Extension: variable arrays cannot be literal types, since they're 1137 // runtime-sized. 1138 if (isVariableArrayType()) 1139 return false; 1140 const Type *BaseTy = getBaseElementTypeUnsafe(); 1141 assert(BaseTy && "NULL element type"); 1142 1143 // Return false for incomplete types after skipping any incomplete array 1144 // types; those are expressly allowed by the standard and thus our API. 1145 if (BaseTy->isIncompleteType()) 1146 return false; 1147 1148 // C++0x [basic.types]p10: 1149 // A type is a literal type if it is: 1150 // -- a scalar type; or 1151 // As an extension, Clang treats vector types and complex types as 1152 // literal types. 1153 if (BaseTy->isScalarType() || BaseTy->isVectorType() || 1154 BaseTy->isAnyComplexType()) 1155 return true; 1156 // -- a reference type; or 1157 if (BaseTy->isReferenceType()) 1158 return true; 1159 // -- a class type that has all of the following properties: 1160 if (const RecordType *RT = BaseTy->getAs<RecordType>()) { 1161 // -- a trivial destructor, 1162 // -- every constructor call and full-expression in the 1163 // brace-or-equal-initializers for non-static data members (if any) 1164 // is a constant expression, 1165 // -- it is an aggregate type or has at least one constexpr 1166 // constructor or constructor template that is not a copy or move 1167 // constructor, and 1168 // -- all non-static data members and base classes of literal types 1169 // 1170 // We resolve DR1361 by ignoring the second bullet. 1171 if (const CXXRecordDecl *ClassDecl = 1172 dyn_cast<CXXRecordDecl>(RT->getDecl())) 1173 return ClassDecl->isLiteral(); 1174 1175 return true; 1176 } 1177 1178 return false; 1179} 1180 1181bool Type::isStandardLayoutType() const { 1182 if (isDependentType()) 1183 return false; 1184 1185 // C++0x [basic.types]p9: 1186 // Scalar types, standard-layout class types, arrays of such types, and 1187 // cv-qualified versions of these types are collectively called 1188 // standard-layout types. 1189 const Type *BaseTy = getBaseElementTypeUnsafe(); 1190 assert(BaseTy && "NULL element type"); 1191 1192 // Return false for incomplete types after skipping any incomplete array 1193 // types which are expressly allowed by the standard and thus our API. 1194 if (BaseTy->isIncompleteType()) 1195 return false; 1196 1197 // As an extension, Clang treats vector types as Scalar types. 1198 if (BaseTy->isScalarType() || BaseTy->isVectorType()) return true; 1199 if (const RecordType *RT = BaseTy->getAs<RecordType>()) { 1200 if (const CXXRecordDecl *ClassDecl = 1201 dyn_cast<CXXRecordDecl>(RT->getDecl())) 1202 if (!ClassDecl->isStandardLayout()) 1203 return false; 1204 1205 // Default to 'true' for non-C++ class types. 1206 // FIXME: This is a bit dubious, but plain C structs should trivially meet 1207 // all the requirements of standard layout classes. 1208 return true; 1209 } 1210 1211 // No other types can match. 1212 return false; 1213} 1214 1215// This is effectively the intersection of isTrivialType and 1216// isStandardLayoutType. We implement it directly to avoid redundant 1217// conversions from a type to a CXXRecordDecl. 1218bool QualType::isCXX11PODType(ASTContext &Context) const { 1219 const Type *ty = getTypePtr(); 1220 if (ty->isDependentType()) 1221 return false; 1222 1223 if (Context.getLangOptions().ObjCAutoRefCount) { 1224 switch (getObjCLifetime()) { 1225 case Qualifiers::OCL_ExplicitNone: 1226 return true; 1227 1228 case Qualifiers::OCL_Strong: 1229 case Qualifiers::OCL_Weak: 1230 case Qualifiers::OCL_Autoreleasing: 1231 return false; 1232 1233 case Qualifiers::OCL_None: 1234 if (ty->isObjCLifetimeType()) 1235 return false; 1236 break; 1237 } 1238 } 1239 1240 // C++11 [basic.types]p9: 1241 // Scalar types, POD classes, arrays of such types, and cv-qualified 1242 // versions of these types are collectively called trivial types. 1243 const Type *BaseTy = ty->getBaseElementTypeUnsafe(); 1244 assert(BaseTy && "NULL element type"); 1245 1246 // Return false for incomplete types after skipping any incomplete array 1247 // types which are expressly allowed by the standard and thus our API. 1248 if (BaseTy->isIncompleteType()) 1249 return false; 1250 1251 // As an extension, Clang treats vector types as Scalar types. 1252 if (BaseTy->isScalarType() || BaseTy->isVectorType()) return true; 1253 if (const RecordType *RT = BaseTy->getAs<RecordType>()) { 1254 if (const CXXRecordDecl *ClassDecl = 1255 dyn_cast<CXXRecordDecl>(RT->getDecl())) { 1256 // C++11 [class]p10: 1257 // A POD struct is a non-union class that is both a trivial class [...] 1258 if (!ClassDecl->isTrivial()) return false; 1259 1260 // C++11 [class]p10: 1261 // A POD struct is a non-union class that is both a trivial class and 1262 // a standard-layout class [...] 1263 if (!ClassDecl->isStandardLayout()) return false; 1264 1265 // C++11 [class]p10: 1266 // A POD struct is a non-union class that is both a trivial class and 1267 // a standard-layout class, and has no non-static data members of type 1268 // non-POD struct, non-POD union (or array of such types). [...] 1269 // 1270 // We don't directly query the recursive aspect as the requiremets for 1271 // both standard-layout classes and trivial classes apply recursively 1272 // already. 1273 } 1274 1275 return true; 1276 } 1277 1278 // No other types can match. 1279 return false; 1280} 1281 1282bool Type::isPromotableIntegerType() const { 1283 if (const BuiltinType *BT = getAs<BuiltinType>()) 1284 switch (BT->getKind()) { 1285 case BuiltinType::Bool: 1286 case BuiltinType::Char_S: 1287 case BuiltinType::Char_U: 1288 case BuiltinType::SChar: 1289 case BuiltinType::UChar: 1290 case BuiltinType::Short: 1291 case BuiltinType::UShort: 1292 case BuiltinType::WChar_S: 1293 case BuiltinType::WChar_U: 1294 case BuiltinType::Char16: 1295 case BuiltinType::Char32: 1296 return true; 1297 default: 1298 return false; 1299 } 1300 1301 // Enumerated types are promotable to their compatible integer types 1302 // (C99 6.3.1.1) a.k.a. its underlying type (C++ [conv.prom]p2). 1303 if (const EnumType *ET = getAs<EnumType>()){ 1304 if (this->isDependentType() || ET->getDecl()->getPromotionType().isNull() 1305 || ET->getDecl()->isScoped()) 1306 return false; 1307 1308 return true; 1309 } 1310 1311 return false; 1312} 1313 1314bool Type::isNullPtrType() const { 1315 if (const BuiltinType *BT = getAs<BuiltinType>()) 1316 return BT->getKind() == BuiltinType::NullPtr; 1317 return false; 1318} 1319 1320bool Type::isSpecifierType() const { 1321 // Note that this intentionally does not use the canonical type. 1322 switch (getTypeClass()) { 1323 case Builtin: 1324 case Record: 1325 case Enum: 1326 case Typedef: 1327 case Complex: 1328 case TypeOfExpr: 1329 case TypeOf: 1330 case TemplateTypeParm: 1331 case SubstTemplateTypeParm: 1332 case TemplateSpecialization: 1333 case Elaborated: 1334 case DependentName: 1335 case DependentTemplateSpecialization: 1336 case ObjCInterface: 1337 case ObjCObject: 1338 case ObjCObjectPointer: // FIXME: object pointers aren't really specifiers 1339 return true; 1340 default: 1341 return false; 1342 } 1343} 1344 1345ElaboratedTypeKeyword 1346TypeWithKeyword::getKeywordForTypeSpec(unsigned TypeSpec) { 1347 switch (TypeSpec) { 1348 default: return ETK_None; 1349 case TST_typename: return ETK_Typename; 1350 case TST_class: return ETK_Class; 1351 case TST_struct: return ETK_Struct; 1352 case TST_union: return ETK_Union; 1353 case TST_enum: return ETK_Enum; 1354 } 1355} 1356 1357TagTypeKind 1358TypeWithKeyword::getTagTypeKindForTypeSpec(unsigned TypeSpec) { 1359 switch(TypeSpec) { 1360 case TST_class: return TTK_Class; 1361 case TST_struct: return TTK_Struct; 1362 case TST_union: return TTK_Union; 1363 case TST_enum: return TTK_Enum; 1364 } 1365 1366 llvm_unreachable("Type specifier is not a tag type kind."); 1367} 1368 1369ElaboratedTypeKeyword 1370TypeWithKeyword::getKeywordForTagTypeKind(TagTypeKind Kind) { 1371 switch (Kind) { 1372 case TTK_Class: return ETK_Class; 1373 case TTK_Struct: return ETK_Struct; 1374 case TTK_Union: return ETK_Union; 1375 case TTK_Enum: return ETK_Enum; 1376 } 1377 llvm_unreachable("Unknown tag type kind."); 1378} 1379 1380TagTypeKind 1381TypeWithKeyword::getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword) { 1382 switch (Keyword) { 1383 case ETK_Class: return TTK_Class; 1384 case ETK_Struct: return TTK_Struct; 1385 case ETK_Union: return TTK_Union; 1386 case ETK_Enum: return TTK_Enum; 1387 case ETK_None: // Fall through. 1388 case ETK_Typename: 1389 llvm_unreachable("Elaborated type keyword is not a tag type kind."); 1390 } 1391 llvm_unreachable("Unknown elaborated type keyword."); 1392} 1393 1394bool 1395TypeWithKeyword::KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword) { 1396 switch (Keyword) { 1397 case ETK_None: 1398 case ETK_Typename: 1399 return false; 1400 case ETK_Class: 1401 case ETK_Struct: 1402 case ETK_Union: 1403 case ETK_Enum: 1404 return true; 1405 } 1406 llvm_unreachable("Unknown elaborated type keyword."); 1407} 1408 1409const char* 1410TypeWithKeyword::getKeywordName(ElaboratedTypeKeyword Keyword) { 1411 switch (Keyword) { 1412 case ETK_None: return ""; 1413 case ETK_Typename: return "typename"; 1414 case ETK_Class: return "class"; 1415 case ETK_Struct: return "struct"; 1416 case ETK_Union: return "union"; 1417 case ETK_Enum: return "enum"; 1418 } 1419 1420 llvm_unreachable("Unknown elaborated type keyword."); 1421} 1422 1423DependentTemplateSpecializationType::DependentTemplateSpecializationType( 1424 ElaboratedTypeKeyword Keyword, 1425 NestedNameSpecifier *NNS, const IdentifierInfo *Name, 1426 unsigned NumArgs, const TemplateArgument *Args, 1427 QualType Canon) 1428 : TypeWithKeyword(Keyword, DependentTemplateSpecialization, Canon, true, true, 1429 /*VariablyModified=*/false, 1430 NNS && NNS->containsUnexpandedParameterPack()), 1431 NNS(NNS), Name(Name), NumArgs(NumArgs) { 1432 assert((!NNS || NNS->isDependent()) && 1433 "DependentTemplateSpecializatonType requires dependent qualifier"); 1434 for (unsigned I = 0; I != NumArgs; ++I) { 1435 if (Args[I].containsUnexpandedParameterPack()) 1436 setContainsUnexpandedParameterPack(); 1437 1438 new (&getArgBuffer()[I]) TemplateArgument(Args[I]); 1439 } 1440} 1441 1442void 1443DependentTemplateSpecializationType::Profile(llvm::FoldingSetNodeID &ID, 1444 const ASTContext &Context, 1445 ElaboratedTypeKeyword Keyword, 1446 NestedNameSpecifier *Qualifier, 1447 const IdentifierInfo *Name, 1448 unsigned NumArgs, 1449 const TemplateArgument *Args) { 1450 ID.AddInteger(Keyword); 1451 ID.AddPointer(Qualifier); 1452 ID.AddPointer(Name); 1453 for (unsigned Idx = 0; Idx < NumArgs; ++Idx) 1454 Args[Idx].Profile(ID, Context); 1455} 1456 1457bool Type::isElaboratedTypeSpecifier() const { 1458 ElaboratedTypeKeyword Keyword; 1459 if (const ElaboratedType *Elab = dyn_cast<ElaboratedType>(this)) 1460 Keyword = Elab->getKeyword(); 1461 else if (const DependentNameType *DepName = dyn_cast<DependentNameType>(this)) 1462 Keyword = DepName->getKeyword(); 1463 else if (const DependentTemplateSpecializationType *DepTST = 1464 dyn_cast<DependentTemplateSpecializationType>(this)) 1465 Keyword = DepTST->getKeyword(); 1466 else 1467 return false; 1468 1469 return TypeWithKeyword::KeywordIsTagTypeKind(Keyword); 1470} 1471 1472const char *Type::getTypeClassName() const { 1473 switch (TypeBits.TC) { 1474#define ABSTRACT_TYPE(Derived, Base) 1475#define TYPE(Derived, Base) case Derived: return #Derived; 1476#include "clang/AST/TypeNodes.def" 1477 } 1478 1479 llvm_unreachable("Invalid type class."); 1480} 1481 1482const char *BuiltinType::getName(const PrintingPolicy &Policy) const { 1483 switch (getKind()) { 1484 case Void: return "void"; 1485 case Bool: return Policy.Bool ? "bool" : "_Bool"; 1486 case Char_S: return "char"; 1487 case Char_U: return "char"; 1488 case SChar: return "signed char"; 1489 case Short: return "short"; 1490 case Int: return "int"; 1491 case Long: return "long"; 1492 case LongLong: return "long long"; 1493 case Int128: return "__int128_t"; 1494 case UChar: return "unsigned char"; 1495 case UShort: return "unsigned short"; 1496 case UInt: return "unsigned int"; 1497 case ULong: return "unsigned long"; 1498 case ULongLong: return "unsigned long long"; 1499 case UInt128: return "__uint128_t"; 1500 case Half: return "half"; 1501 case Float: return "float"; 1502 case Double: return "double"; 1503 case LongDouble: return "long double"; 1504 case WChar_S: 1505 case WChar_U: return "wchar_t"; 1506 case Char16: return "char16_t"; 1507 case Char32: return "char32_t"; 1508 case NullPtr: return "nullptr_t"; 1509 case Overload: return "<overloaded function type>"; 1510 case BoundMember: return "<bound member function type>"; 1511 case PseudoObject: return "<pseudo-object type>"; 1512 case Dependent: return "<dependent type>"; 1513 case UnknownAny: return "<unknown type>"; 1514 case ARCUnbridgedCast: return "<ARC unbridged cast type>"; 1515 case ObjCId: return "id"; 1516 case ObjCClass: return "Class"; 1517 case ObjCSel: return "SEL"; 1518 } 1519 1520 llvm_unreachable("Invalid builtin type."); 1521} 1522 1523QualType QualType::getNonLValueExprType(ASTContext &Context) const { 1524 if (const ReferenceType *RefType = getTypePtr()->getAs<ReferenceType>()) 1525 return RefType->getPointeeType(); 1526 1527 // C++0x [basic.lval]: 1528 // Class prvalues can have cv-qualified types; non-class prvalues always 1529 // have cv-unqualified types. 1530 // 1531 // See also C99 6.3.2.1p2. 1532 if (!Context.getLangOptions().CPlusPlus || 1533 (!getTypePtr()->isDependentType() && !getTypePtr()->isRecordType())) 1534 return getUnqualifiedType(); 1535 1536 return *this; 1537} 1538 1539StringRef FunctionType::getNameForCallConv(CallingConv CC) { 1540 switch (CC) { 1541 case CC_Default: 1542 llvm_unreachable("no name for default cc"); 1543 1544 case CC_C: return "cdecl"; 1545 case CC_X86StdCall: return "stdcall"; 1546 case CC_X86FastCall: return "fastcall"; 1547 case CC_X86ThisCall: return "thiscall"; 1548 case CC_X86Pascal: return "pascal"; 1549 case CC_AAPCS: return "aapcs"; 1550 case CC_AAPCS_VFP: return "aapcs-vfp"; 1551 } 1552 1553 llvm_unreachable("Invalid calling convention."); 1554} 1555 1556FunctionProtoType::FunctionProtoType(QualType result, const QualType *args, 1557 unsigned numArgs, QualType canonical, 1558 const ExtProtoInfo &epi) 1559 : FunctionType(FunctionProto, result, epi.Variadic, epi.TypeQuals, 1560 epi.RefQualifier, canonical, 1561 result->isDependentType(), 1562 result->isInstantiationDependentType(), 1563 result->isVariablyModifiedType(), 1564 result->containsUnexpandedParameterPack(), 1565 epi.ExtInfo), 1566 NumArgs(numArgs), NumExceptions(epi.NumExceptions), 1567 ExceptionSpecType(epi.ExceptionSpecType), 1568 HasAnyConsumedArgs(epi.ConsumedArguments != 0) 1569{ 1570 // Fill in the trailing argument array. 1571 QualType *argSlot = reinterpret_cast<QualType*>(this+1); 1572 for (unsigned i = 0; i != numArgs; ++i) { 1573 if (args[i]->isDependentType()) 1574 setDependent(); 1575 else if (args[i]->isInstantiationDependentType()) 1576 setInstantiationDependent(); 1577 1578 if (args[i]->containsUnexpandedParameterPack()) 1579 setContainsUnexpandedParameterPack(); 1580 1581 argSlot[i] = args[i]; 1582 } 1583 1584 if (getExceptionSpecType() == EST_Dynamic) { 1585 // Fill in the exception array. 1586 QualType *exnSlot = argSlot + numArgs; 1587 for (unsigned i = 0, e = epi.NumExceptions; i != e; ++i) { 1588 if (epi.Exceptions[i]->isDependentType()) 1589 setDependent(); 1590 else if (epi.Exceptions[i]->isInstantiationDependentType()) 1591 setInstantiationDependent(); 1592 1593 if (epi.Exceptions[i]->containsUnexpandedParameterPack()) 1594 setContainsUnexpandedParameterPack(); 1595 1596 exnSlot[i] = epi.Exceptions[i]; 1597 } 1598 } else if (getExceptionSpecType() == EST_ComputedNoexcept) { 1599 // Store the noexcept expression and context. 1600 Expr **noexSlot = reinterpret_cast<Expr**>(argSlot + numArgs); 1601 *noexSlot = epi.NoexceptExpr; 1602 1603 if (epi.NoexceptExpr) { 1604 if (epi.NoexceptExpr->isValueDependent() 1605 || epi.NoexceptExpr->isTypeDependent()) 1606 setDependent(); 1607 else if (epi.NoexceptExpr->isInstantiationDependent()) 1608 setInstantiationDependent(); 1609 } 1610 } 1611 1612 if (epi.ConsumedArguments) { 1613 bool *consumedArgs = const_cast<bool*>(getConsumedArgsBuffer()); 1614 for (unsigned i = 0; i != numArgs; ++i) 1615 consumedArgs[i] = epi.ConsumedArguments[i]; 1616 } 1617} 1618 1619FunctionProtoType::NoexceptResult 1620FunctionProtoType::getNoexceptSpec(ASTContext &ctx) const { 1621 ExceptionSpecificationType est = getExceptionSpecType(); 1622 if (est == EST_BasicNoexcept) 1623 return NR_Nothrow; 1624 1625 if (est != EST_ComputedNoexcept) 1626 return NR_NoNoexcept; 1627 1628 Expr *noexceptExpr = getNoexceptExpr(); 1629 if (!noexceptExpr) 1630 return NR_BadNoexcept; 1631 if (noexceptExpr->isValueDependent()) 1632 return NR_Dependent; 1633 1634 llvm::APSInt value; 1635 bool isICE = noexceptExpr->isIntegerConstantExpr(value, ctx, 0, 1636 /*evaluated*/false); 1637 (void)isICE; 1638 assert(isICE && "AST should not contain bad noexcept expressions."); 1639 1640 return value.getBoolValue() ? NR_Nothrow : NR_Throw; 1641} 1642 1643bool FunctionProtoType::isTemplateVariadic() const { 1644 for (unsigned ArgIdx = getNumArgs(); ArgIdx; --ArgIdx) 1645 if (isa<PackExpansionType>(getArgType(ArgIdx - 1))) 1646 return true; 1647 1648 return false; 1649} 1650 1651void FunctionProtoType::Profile(llvm::FoldingSetNodeID &ID, QualType Result, 1652 const QualType *ArgTys, unsigned NumArgs, 1653 const ExtProtoInfo &epi, 1654 const ASTContext &Context) { 1655 1656 // We have to be careful not to get ambiguous profile encodings. 1657 // Note that valid type pointers are never ambiguous with anything else. 1658 // 1659 // The encoding grammar begins: 1660 // type type* bool int bool 1661 // If that final bool is true, then there is a section for the EH spec: 1662 // bool type* 1663 // This is followed by an optional "consumed argument" section of the 1664 // same length as the first type sequence: 1665 // bool* 1666 // Finally, we have the ext info: 1667 // int 1668 // 1669 // There is no ambiguity between the consumed arguments and an empty EH 1670 // spec because of the leading 'bool' which unambiguously indicates 1671 // whether the following bool is the EH spec or part of the arguments. 1672 1673 ID.AddPointer(Result.getAsOpaquePtr()); 1674 for (unsigned i = 0; i != NumArgs; ++i) 1675 ID.AddPointer(ArgTys[i].getAsOpaquePtr()); 1676 // This method is relatively performance sensitive, so as a performance 1677 // shortcut, use one AddInteger call instead of four for the next four 1678 // fields. 1679 assert(!(unsigned(epi.Variadic) & ~1) && 1680 !(unsigned(epi.TypeQuals) & ~255) && 1681 !(unsigned(epi.RefQualifier) & ~3) && 1682 !(unsigned(epi.ExceptionSpecType) & ~7) && 1683 "Values larger than expected."); 1684 ID.AddInteger(unsigned(epi.Variadic) + 1685 (epi.TypeQuals << 1) + 1686 (epi.RefQualifier << 9) + 1687 (epi.ExceptionSpecType << 11)); 1688 if (epi.ExceptionSpecType == EST_Dynamic) { 1689 for (unsigned i = 0; i != epi.NumExceptions; ++i) 1690 ID.AddPointer(epi.Exceptions[i].getAsOpaquePtr()); 1691 } else if (epi.ExceptionSpecType == EST_ComputedNoexcept && epi.NoexceptExpr){ 1692 epi.NoexceptExpr->Profile(ID, Context, false); 1693 } 1694 if (epi.ConsumedArguments) { 1695 for (unsigned i = 0; i != NumArgs; ++i) 1696 ID.AddBoolean(epi.ConsumedArguments[i]); 1697 } 1698 epi.ExtInfo.Profile(ID); 1699} 1700 1701void FunctionProtoType::Profile(llvm::FoldingSetNodeID &ID, 1702 const ASTContext &Ctx) { 1703 Profile(ID, getResultType(), arg_type_begin(), NumArgs, getExtProtoInfo(), 1704 Ctx); 1705} 1706 1707QualType TypedefType::desugar() const { 1708 return getDecl()->getUnderlyingType(); 1709} 1710 1711TypeOfExprType::TypeOfExprType(Expr *E, QualType can) 1712 : Type(TypeOfExpr, can, E->isTypeDependent(), 1713 E->isInstantiationDependent(), 1714 E->getType()->isVariablyModifiedType(), 1715 E->containsUnexpandedParameterPack()), 1716 TOExpr(E) { 1717} 1718 1719bool TypeOfExprType::isSugared() const { 1720 return !TOExpr->isTypeDependent(); 1721} 1722 1723QualType TypeOfExprType::desugar() const { 1724 if (isSugared()) 1725 return getUnderlyingExpr()->getType(); 1726 1727 return QualType(this, 0); 1728} 1729 1730void DependentTypeOfExprType::Profile(llvm::FoldingSetNodeID &ID, 1731 const ASTContext &Context, Expr *E) { 1732 E->Profile(ID, Context, true); 1733} 1734 1735DecltypeType::DecltypeType(Expr *E, QualType underlyingType, QualType can) 1736 // C++11 [temp.type]p2: "If an expression e involves a template parameter, 1737 // decltype(e) denotes a unique dependent type." Hence a decltype type is 1738 // type-dependent even if its expression is only instantiation-dependent. 1739 : Type(Decltype, can, E->isInstantiationDependent(), 1740 E->isInstantiationDependent(), 1741 E->getType()->isVariablyModifiedType(), 1742 E->containsUnexpandedParameterPack()), 1743 E(E), 1744 UnderlyingType(underlyingType) { 1745} 1746 1747bool DecltypeType::isSugared() const { return !E->isInstantiationDependent(); } 1748 1749QualType DecltypeType::desugar() const { 1750 if (isSugared()) 1751 return getUnderlyingType(); 1752 1753 return QualType(this, 0); 1754} 1755 1756DependentDecltypeType::DependentDecltypeType(const ASTContext &Context, Expr *E) 1757 : DecltypeType(E, Context.DependentTy), Context(Context) { } 1758 1759void DependentDecltypeType::Profile(llvm::FoldingSetNodeID &ID, 1760 const ASTContext &Context, Expr *E) { 1761 E->Profile(ID, Context, true); 1762} 1763 1764TagType::TagType(TypeClass TC, const TagDecl *D, QualType can) 1765 : Type(TC, can, D->isDependentType(), 1766 /*InstantiationDependent=*/D->isDependentType(), 1767 /*VariablyModified=*/false, 1768 /*ContainsUnexpandedParameterPack=*/false), 1769 decl(const_cast<TagDecl*>(D)) {} 1770 1771static TagDecl *getInterestingTagDecl(TagDecl *decl) { 1772 for (TagDecl::redecl_iterator I = decl->redecls_begin(), 1773 E = decl->redecls_end(); 1774 I != E; ++I) { 1775 if (I->isCompleteDefinition() || I->isBeingDefined()) 1776 return *I; 1777 } 1778 // If there's no definition (not even in progress), return what we have. 1779 return decl; 1780} 1781 1782UnaryTransformType::UnaryTransformType(QualType BaseType, 1783 QualType UnderlyingType, 1784 UTTKind UKind, 1785 QualType CanonicalType) 1786 : Type(UnaryTransform, CanonicalType, UnderlyingType->isDependentType(), 1787 UnderlyingType->isInstantiationDependentType(), 1788 UnderlyingType->isVariablyModifiedType(), 1789 BaseType->containsUnexpandedParameterPack()) 1790 , BaseType(BaseType), UnderlyingType(UnderlyingType), UKind(UKind) 1791{} 1792 1793TagDecl *TagType::getDecl() const { 1794 return getInterestingTagDecl(decl); 1795} 1796 1797bool TagType::isBeingDefined() const { 1798 return getDecl()->isBeingDefined(); 1799} 1800 1801CXXRecordDecl *InjectedClassNameType::getDecl() const { 1802 return cast<CXXRecordDecl>(getInterestingTagDecl(Decl)); 1803} 1804 1805bool RecordType::classof(const TagType *TT) { 1806 return isa<RecordDecl>(TT->getDecl()); 1807} 1808 1809bool EnumType::classof(const TagType *TT) { 1810 return isa<EnumDecl>(TT->getDecl()); 1811} 1812 1813IdentifierInfo *TemplateTypeParmType::getIdentifier() const { 1814 return isCanonicalUnqualified() ? 0 : getDecl()->getIdentifier(); 1815} 1816 1817SubstTemplateTypeParmPackType:: 1818SubstTemplateTypeParmPackType(const TemplateTypeParmType *Param, 1819 QualType Canon, 1820 const TemplateArgument &ArgPack) 1821 : Type(SubstTemplateTypeParmPack, Canon, true, true, false, true), 1822 Replaced(Param), 1823 Arguments(ArgPack.pack_begin()), NumArguments(ArgPack.pack_size()) 1824{ 1825} 1826 1827TemplateArgument SubstTemplateTypeParmPackType::getArgumentPack() const { 1828 return TemplateArgument(Arguments, NumArguments); 1829} 1830 1831void SubstTemplateTypeParmPackType::Profile(llvm::FoldingSetNodeID &ID) { 1832 Profile(ID, getReplacedParameter(), getArgumentPack()); 1833} 1834 1835void SubstTemplateTypeParmPackType::Profile(llvm::FoldingSetNodeID &ID, 1836 const TemplateTypeParmType *Replaced, 1837 const TemplateArgument &ArgPack) { 1838 ID.AddPointer(Replaced); 1839 ID.AddInteger(ArgPack.pack_size()); 1840 for (TemplateArgument::pack_iterator P = ArgPack.pack_begin(), 1841 PEnd = ArgPack.pack_end(); 1842 P != PEnd; ++P) 1843 ID.AddPointer(P->getAsType().getAsOpaquePtr()); 1844} 1845 1846bool TemplateSpecializationType:: 1847anyDependentTemplateArguments(const TemplateArgumentListInfo &Args, 1848 bool &InstantiationDependent) { 1849 return anyDependentTemplateArguments(Args.getArgumentArray(), Args.size(), 1850 InstantiationDependent); 1851} 1852 1853bool TemplateSpecializationType:: 1854anyDependentTemplateArguments(const TemplateArgumentLoc *Args, unsigned N, 1855 bool &InstantiationDependent) { 1856 for (unsigned i = 0; i != N; ++i) { 1857 if (Args[i].getArgument().isDependent()) { 1858 InstantiationDependent = true; 1859 return true; 1860 } 1861 1862 if (Args[i].getArgument().isInstantiationDependent()) 1863 InstantiationDependent = true; 1864 } 1865 return false; 1866} 1867 1868bool TemplateSpecializationType:: 1869anyDependentTemplateArguments(const TemplateArgument *Args, unsigned N, 1870 bool &InstantiationDependent) { 1871 for (unsigned i = 0; i != N; ++i) { 1872 if (Args[i].isDependent()) { 1873 InstantiationDependent = true; 1874 return true; 1875 } 1876 1877 if (Args[i].isInstantiationDependent()) 1878 InstantiationDependent = true; 1879 } 1880 return false; 1881} 1882 1883TemplateSpecializationType:: 1884TemplateSpecializationType(TemplateName T, 1885 const TemplateArgument *Args, unsigned NumArgs, 1886 QualType Canon, QualType AliasedType) 1887 : Type(TemplateSpecialization, 1888 Canon.isNull()? QualType(this, 0) : Canon, 1889 Canon.isNull()? T.isDependent() : Canon->isDependentType(), 1890 Canon.isNull()? T.isDependent() 1891 : Canon->isInstantiationDependentType(), 1892 false, T.containsUnexpandedParameterPack()), 1893 Template(T), NumArgs(NumArgs) { 1894 assert(!T.getAsDependentTemplateName() && 1895 "Use DependentTemplateSpecializationType for dependent template-name"); 1896 assert((T.getKind() == TemplateName::Template || 1897 T.getKind() == TemplateName::SubstTemplateTemplateParm || 1898 T.getKind() == TemplateName::SubstTemplateTemplateParmPack) && 1899 "Unexpected template name for TemplateSpecializationType"); 1900 bool InstantiationDependent; 1901 (void)InstantiationDependent; 1902 assert((!Canon.isNull() || 1903 T.isDependent() || 1904 anyDependentTemplateArguments(Args, NumArgs, 1905 InstantiationDependent)) && 1906 "No canonical type for non-dependent class template specialization"); 1907 1908 TemplateArgument *TemplateArgs 1909 = reinterpret_cast<TemplateArgument *>(this + 1); 1910 for (unsigned Arg = 0; Arg < NumArgs; ++Arg) { 1911 // Update dependent and variably-modified bits. 1912 // If the canonical type exists and is non-dependent, the template 1913 // specialization type can be non-dependent even if one of the type 1914 // arguments is. Given: 1915 // template<typename T> using U = int; 1916 // U<T> is always non-dependent, irrespective of the type T. 1917 if (Canon.isNull() && Args[Arg].isDependent()) 1918 setDependent(); 1919 else if (Args[Arg].isInstantiationDependent()) 1920 setInstantiationDependent(); 1921 1922 if (Args[Arg].getKind() == TemplateArgument::Type && 1923 Args[Arg].getAsType()->isVariablyModifiedType()) 1924 setVariablyModified(); 1925 if (Args[Arg].containsUnexpandedParameterPack()) 1926 setContainsUnexpandedParameterPack(); 1927 1928 new (&TemplateArgs[Arg]) TemplateArgument(Args[Arg]); 1929 } 1930 1931 // Store the aliased type if this is a type alias template specialization. 1932 bool IsTypeAlias = !AliasedType.isNull(); 1933 assert(IsTypeAlias == isTypeAlias() && 1934 "allocated wrong size for type alias"); 1935 if (IsTypeAlias) { 1936 TemplateArgument *Begin = reinterpret_cast<TemplateArgument *>(this + 1); 1937 *reinterpret_cast<QualType*>(Begin + getNumArgs()) = AliasedType; 1938 } 1939} 1940 1941void 1942TemplateSpecializationType::Profile(llvm::FoldingSetNodeID &ID, 1943 TemplateName T, 1944 const TemplateArgument *Args, 1945 unsigned NumArgs, 1946 const ASTContext &Context) { 1947 T.Profile(ID); 1948 for (unsigned Idx = 0; Idx < NumArgs; ++Idx) 1949 Args[Idx].Profile(ID, Context); 1950} 1951 1952bool TemplateSpecializationType::isTypeAlias() const { 1953 TemplateDecl *D = Template.getAsTemplateDecl(); 1954 return D && isa<TypeAliasTemplateDecl>(D); 1955} 1956 1957QualType 1958QualifierCollector::apply(const ASTContext &Context, QualType QT) const { 1959 if (!hasNonFastQualifiers()) 1960 return QT.withFastQualifiers(getFastQualifiers()); 1961 1962 return Context.getQualifiedType(QT, *this); 1963} 1964 1965QualType 1966QualifierCollector::apply(const ASTContext &Context, const Type *T) const { 1967 if (!hasNonFastQualifiers()) 1968 return QualType(T, getFastQualifiers()); 1969 1970 return Context.getQualifiedType(T, *this); 1971} 1972 1973void ObjCObjectTypeImpl::Profile(llvm::FoldingSetNodeID &ID, 1974 QualType BaseType, 1975 ObjCProtocolDecl * const *Protocols, 1976 unsigned NumProtocols) { 1977 ID.AddPointer(BaseType.getAsOpaquePtr()); 1978 for (unsigned i = 0; i != NumProtocols; i++) 1979 ID.AddPointer(Protocols[i]); 1980} 1981 1982void ObjCObjectTypeImpl::Profile(llvm::FoldingSetNodeID &ID) { 1983 Profile(ID, getBaseType(), qual_begin(), getNumProtocols()); 1984} 1985 1986namespace { 1987 1988/// \brief The cached properties of a type. 1989class CachedProperties { 1990 NamedDecl::LinkageInfo LV; 1991 bool local; 1992 1993public: 1994 CachedProperties(NamedDecl::LinkageInfo LV, bool local) 1995 : LV(LV), local(local) {} 1996 1997 Linkage getLinkage() const { return LV.linkage(); } 1998 Visibility getVisibility() const { return LV.visibility(); } 1999 bool isVisibilityExplicit() const { return LV.visibilityExplicit(); } 2000 bool hasLocalOrUnnamedType() const { return local; } 2001 2002 friend CachedProperties merge(CachedProperties L, CachedProperties R) { 2003 NamedDecl::LinkageInfo MergedLV = L.LV; 2004 MergedLV.merge(R.LV); 2005 return CachedProperties(MergedLV, 2006 L.hasLocalOrUnnamedType() | R.hasLocalOrUnnamedType()); 2007 } 2008}; 2009} 2010 2011static CachedProperties computeCachedProperties(const Type *T); 2012 2013namespace clang { 2014/// The type-property cache. This is templated so as to be 2015/// instantiated at an internal type to prevent unnecessary symbol 2016/// leakage. 2017template <class Private> class TypePropertyCache { 2018public: 2019 static CachedProperties get(QualType T) { 2020 return get(T.getTypePtr()); 2021 } 2022 2023 static CachedProperties get(const Type *T) { 2024 ensure(T); 2025 NamedDecl::LinkageInfo LV(T->TypeBits.getLinkage(), 2026 T->TypeBits.getVisibility(), 2027 T->TypeBits.isVisibilityExplicit()); 2028 return CachedProperties(LV, T->TypeBits.hasLocalOrUnnamedType()); 2029 } 2030 2031 static void ensure(const Type *T) { 2032 // If the cache is valid, we're okay. 2033 if (T->TypeBits.isCacheValid()) return; 2034 2035 // If this type is non-canonical, ask its canonical type for the 2036 // relevant information. 2037 if (!T->isCanonicalUnqualified()) { 2038 const Type *CT = T->getCanonicalTypeInternal().getTypePtr(); 2039 ensure(CT); 2040 T->TypeBits.CacheValidAndVisibility = 2041 CT->TypeBits.CacheValidAndVisibility; 2042 T->TypeBits.CachedExplicitVisibility = 2043 CT->TypeBits.CachedExplicitVisibility; 2044 T->TypeBits.CachedLinkage = CT->TypeBits.CachedLinkage; 2045 T->TypeBits.CachedLocalOrUnnamed = CT->TypeBits.CachedLocalOrUnnamed; 2046 return; 2047 } 2048 2049 // Compute the cached properties and then set the cache. 2050 CachedProperties Result = computeCachedProperties(T); 2051 T->TypeBits.CacheValidAndVisibility = Result.getVisibility() + 1U; 2052 T->TypeBits.CachedExplicitVisibility = Result.isVisibilityExplicit(); 2053 assert(T->TypeBits.isCacheValid() && 2054 T->TypeBits.getVisibility() == Result.getVisibility()); 2055 T->TypeBits.CachedLinkage = Result.getLinkage(); 2056 T->TypeBits.CachedLocalOrUnnamed = Result.hasLocalOrUnnamedType(); 2057 } 2058}; 2059} 2060 2061// Instantiate the friend template at a private class. In a 2062// reasonable implementation, these symbols will be internal. 2063// It is terrible that this is the best way to accomplish this. 2064namespace { class Private {}; } 2065typedef TypePropertyCache<Private> Cache; 2066 2067static CachedProperties computeCachedProperties(const Type *T) { 2068 switch (T->getTypeClass()) { 2069#define TYPE(Class,Base) 2070#define NON_CANONICAL_TYPE(Class,Base) case Type::Class: 2071#include "clang/AST/TypeNodes.def" 2072 llvm_unreachable("didn't expect a non-canonical type here"); 2073 2074#define TYPE(Class,Base) 2075#define DEPENDENT_TYPE(Class,Base) case Type::Class: 2076#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class,Base) case Type::Class: 2077#include "clang/AST/TypeNodes.def" 2078 // Treat instantiation-dependent types as external. 2079 assert(T->isInstantiationDependentType()); 2080 return CachedProperties(NamedDecl::LinkageInfo(), false); 2081 2082 case Type::Builtin: 2083 // C++ [basic.link]p8: 2084 // A type is said to have linkage if and only if: 2085 // - it is a fundamental type (3.9.1); or 2086 return CachedProperties(NamedDecl::LinkageInfo(), false); 2087 2088 case Type::Record: 2089 case Type::Enum: { 2090 const TagDecl *Tag = cast<TagType>(T)->getDecl(); 2091 2092 // C++ [basic.link]p8: 2093 // - it is a class or enumeration type that is named (or has a name 2094 // for linkage purposes (7.1.3)) and the name has linkage; or 2095 // - it is a specialization of a class template (14); or 2096 NamedDecl::LinkageInfo LV = Tag->getLinkageAndVisibility(); 2097 bool IsLocalOrUnnamed = 2098 Tag->getDeclContext()->isFunctionOrMethod() || 2099 (!Tag->getIdentifier() && !Tag->getTypedefNameForAnonDecl()); 2100 return CachedProperties(LV, IsLocalOrUnnamed); 2101 } 2102 2103 // C++ [basic.link]p8: 2104 // - it is a compound type (3.9.2) other than a class or enumeration, 2105 // compounded exclusively from types that have linkage; or 2106 case Type::Complex: 2107 return Cache::get(cast<ComplexType>(T)->getElementType()); 2108 case Type::Pointer: 2109 return Cache::get(cast<PointerType>(T)->getPointeeType()); 2110 case Type::BlockPointer: 2111 return Cache::get(cast<BlockPointerType>(T)->getPointeeType()); 2112 case Type::LValueReference: 2113 case Type::RValueReference: 2114 return Cache::get(cast<ReferenceType>(T)->getPointeeType()); 2115 case Type::MemberPointer: { 2116 const MemberPointerType *MPT = cast<MemberPointerType>(T); 2117 return merge(Cache::get(MPT->getClass()), 2118 Cache::get(MPT->getPointeeType())); 2119 } 2120 case Type::ConstantArray: 2121 case Type::IncompleteArray: 2122 case Type::VariableArray: 2123 return Cache::get(cast<ArrayType>(T)->getElementType()); 2124 case Type::Vector: 2125 case Type::ExtVector: 2126 return Cache::get(cast<VectorType>(T)->getElementType()); 2127 case Type::FunctionNoProto: 2128 return Cache::get(cast<FunctionType>(T)->getResultType()); 2129 case Type::FunctionProto: { 2130 const FunctionProtoType *FPT = cast<FunctionProtoType>(T); 2131 CachedProperties result = Cache::get(FPT->getResultType()); 2132 for (FunctionProtoType::arg_type_iterator ai = FPT->arg_type_begin(), 2133 ae = FPT->arg_type_end(); ai != ae; ++ai) 2134 result = merge(result, Cache::get(*ai)); 2135 return result; 2136 } 2137 case Type::ObjCInterface: { 2138 NamedDecl::LinkageInfo LV = 2139 cast<ObjCInterfaceType>(T)->getDecl()->getLinkageAndVisibility(); 2140 return CachedProperties(LV, false); 2141 } 2142 case Type::ObjCObject: 2143 return Cache::get(cast<ObjCObjectType>(T)->getBaseType()); 2144 case Type::ObjCObjectPointer: 2145 return Cache::get(cast<ObjCObjectPointerType>(T)->getPointeeType()); 2146 case Type::Atomic: 2147 return Cache::get(cast<AtomicType>(T)->getValueType()); 2148 } 2149 2150 llvm_unreachable("unhandled type class"); 2151 2152 // C++ [basic.link]p8: 2153 // Names not covered by these rules have no linkage. 2154 NamedDecl::LinkageInfo LV(NoLinkage, DefaultVisibility, false); 2155 return CachedProperties(LV, false); 2156} 2157 2158/// \brief Determine the linkage of this type. 2159Linkage Type::getLinkage() const { 2160 Cache::ensure(this); 2161 return TypeBits.getLinkage(); 2162} 2163 2164/// \brief Determine the linkage of this type. 2165Visibility Type::getVisibility() const { 2166 Cache::ensure(this); 2167 return TypeBits.getVisibility(); 2168} 2169 2170bool Type::isVisibilityExplicit() const { 2171 Cache::ensure(this); 2172 return TypeBits.isVisibilityExplicit(); 2173} 2174 2175bool Type::hasUnnamedOrLocalType() const { 2176 Cache::ensure(this); 2177 return TypeBits.hasLocalOrUnnamedType(); 2178} 2179 2180std::pair<Linkage,Visibility> Type::getLinkageAndVisibility() const { 2181 Cache::ensure(this); 2182 return std::make_pair(TypeBits.getLinkage(), TypeBits.getVisibility()); 2183} 2184 2185void Type::ClearLinkageCache() { 2186 TypeBits.CacheValidAndVisibility = 0; 2187 if (QualType(this, 0) != CanonicalType) 2188 CanonicalType->TypeBits.CacheValidAndVisibility = 0; 2189} 2190 2191Qualifiers::ObjCLifetime Type::getObjCARCImplicitLifetime() const { 2192 if (isObjCARCImplicitlyUnretainedType()) 2193 return Qualifiers::OCL_ExplicitNone; 2194 return Qualifiers::OCL_Strong; 2195} 2196 2197bool Type::isObjCARCImplicitlyUnretainedType() const { 2198 assert(isObjCLifetimeType() && 2199 "cannot query implicit lifetime for non-inferrable type"); 2200 2201 const Type *canon = getCanonicalTypeInternal().getTypePtr(); 2202 2203 // Walk down to the base type. We don't care about qualifiers for this. 2204 while (const ArrayType *array = dyn_cast<ArrayType>(canon)) 2205 canon = array->getElementType().getTypePtr(); 2206 2207 if (const ObjCObjectPointerType *opt 2208 = dyn_cast<ObjCObjectPointerType>(canon)) { 2209 // Class and Class<Protocol> don't require retension. 2210 if (opt->getObjectType()->isObjCClass()) 2211 return true; 2212 } 2213 2214 return false; 2215} 2216 2217bool Type::isObjCNSObjectType() const { 2218 if (const TypedefType *typedefType = dyn_cast<TypedefType>(this)) 2219 return typedefType->getDecl()->hasAttr<ObjCNSObjectAttr>(); 2220 return false; 2221} 2222bool Type::isObjCRetainableType() const { 2223 return isObjCObjectPointerType() || 2224 isBlockPointerType() || 2225 isObjCNSObjectType(); 2226} 2227bool Type::isObjCIndirectLifetimeType() const { 2228 if (isObjCLifetimeType()) 2229 return true; 2230 if (const PointerType *OPT = getAs<PointerType>()) 2231 return OPT->getPointeeType()->isObjCIndirectLifetimeType(); 2232 if (const ReferenceType *Ref = getAs<ReferenceType>()) 2233 return Ref->getPointeeType()->isObjCIndirectLifetimeType(); 2234 if (const MemberPointerType *MemPtr = getAs<MemberPointerType>()) 2235 return MemPtr->getPointeeType()->isObjCIndirectLifetimeType(); 2236 return false; 2237} 2238 2239/// Returns true if objects of this type have lifetime semantics under 2240/// ARC. 2241bool Type::isObjCLifetimeType() const { 2242 const Type *type = this; 2243 while (const ArrayType *array = type->getAsArrayTypeUnsafe()) 2244 type = array->getElementType().getTypePtr(); 2245 return type->isObjCRetainableType(); 2246} 2247 2248/// \brief Determine whether the given type T is a "bridgable" Objective-C type, 2249/// which is either an Objective-C object pointer type or an 2250bool Type::isObjCARCBridgableType() const { 2251 return isObjCObjectPointerType() || isBlockPointerType(); 2252} 2253 2254/// \brief Determine whether the given type T is a "bridgeable" C type. 2255bool Type::isCARCBridgableType() const { 2256 const PointerType *Pointer = getAs<PointerType>(); 2257 if (!Pointer) 2258 return false; 2259 2260 QualType Pointee = Pointer->getPointeeType(); 2261 return Pointee->isVoidType() || Pointee->isRecordType(); 2262} 2263 2264bool Type::hasSizedVLAType() const { 2265 if (!isVariablyModifiedType()) return false; 2266 2267 if (const PointerType *ptr = getAs<PointerType>()) 2268 return ptr->getPointeeType()->hasSizedVLAType(); 2269 if (const ReferenceType *ref = getAs<ReferenceType>()) 2270 return ref->getPointeeType()->hasSizedVLAType(); 2271 if (const ArrayType *arr = getAsArrayTypeUnsafe()) { 2272 if (isa<VariableArrayType>(arr) && 2273 cast<VariableArrayType>(arr)->getSizeExpr()) 2274 return true; 2275 2276 return arr->getElementType()->hasSizedVLAType(); 2277 } 2278 2279 return false; 2280} 2281 2282QualType::DestructionKind QualType::isDestructedTypeImpl(QualType type) { 2283 switch (type.getObjCLifetime()) { 2284 case Qualifiers::OCL_None: 2285 case Qualifiers::OCL_ExplicitNone: 2286 case Qualifiers::OCL_Autoreleasing: 2287 break; 2288 2289 case Qualifiers::OCL_Strong: 2290 return DK_objc_strong_lifetime; 2291 case Qualifiers::OCL_Weak: 2292 return DK_objc_weak_lifetime; 2293 } 2294 2295 /// Currently, the only destruction kind we recognize is C++ objects 2296 /// with non-trivial destructors. 2297 const CXXRecordDecl *record = 2298 type->getBaseElementTypeUnsafe()->getAsCXXRecordDecl(); 2299 if (record && record->hasDefinition() && !record->hasTrivialDestructor()) 2300 return DK_cxx_destructor; 2301 2302 return DK_none; 2303} 2304 2305bool QualType::hasTrivialAssignment(ASTContext &Context, bool Copying) const { 2306 switch (getObjCLifetime()) { 2307 case Qualifiers::OCL_None: 2308 break; 2309 2310 case Qualifiers::OCL_ExplicitNone: 2311 return true; 2312 2313 case Qualifiers::OCL_Autoreleasing: 2314 case Qualifiers::OCL_Strong: 2315 case Qualifiers::OCL_Weak: 2316 return !Context.getLangOptions().ObjCAutoRefCount; 2317 } 2318 2319 if (const CXXRecordDecl *Record 2320 = getTypePtr()->getBaseElementTypeUnsafe()->getAsCXXRecordDecl()) 2321 return Copying ? Record->hasTrivialCopyAssignment() : 2322 Record->hasTrivialMoveAssignment(); 2323 2324 return true; 2325} 2326