Type.cpp revision 9f569cca2a4c5fb6026005434e27025b9e71309d
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::isFloatingType() const { 770 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 771 return BT->getKind() >= BuiltinType::Float && 772 BT->getKind() <= BuiltinType::LongDouble; 773 if (const ComplexType *CT = dyn_cast<ComplexType>(CanonicalType)) 774 return CT->getElementType()->isFloatingType(); 775 return false; 776} 777 778bool Type::hasFloatingRepresentation() const { 779 if (const VectorType *VT = dyn_cast<VectorType>(CanonicalType)) 780 return VT->getElementType()->isFloatingType(); 781 else 782 return isFloatingType(); 783} 784 785bool Type::isRealFloatingType() const { 786 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 787 return BT->isFloatingPoint(); 788 return false; 789} 790 791bool Type::isRealType() const { 792 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 793 return BT->getKind() >= BuiltinType::Bool && 794 BT->getKind() <= BuiltinType::LongDouble; 795 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) 796 return ET->getDecl()->isComplete() && !ET->getDecl()->isScoped(); 797 return false; 798} 799 800bool Type::isArithmeticType() const { 801 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 802 return BT->getKind() >= BuiltinType::Bool && 803 BT->getKind() <= BuiltinType::LongDouble; 804 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) 805 // GCC allows forward declaration of enum types (forbid by C99 6.7.2.3p2). 806 // If a body isn't seen by the time we get here, return false. 807 // 808 // C++0x: Enumerations are not arithmetic types. For now, just return 809 // false for scoped enumerations since that will disable any 810 // unwanted implicit conversions. 811 return !ET->getDecl()->isScoped() && ET->getDecl()->isComplete(); 812 return isa<ComplexType>(CanonicalType); 813} 814 815bool Type::isScalarType() const { 816 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 817 return BT->getKind() > BuiltinType::Void && 818 BT->getKind() <= BuiltinType::NullPtr; 819 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) 820 // Enums are scalar types, but only if they are defined. Incomplete enums 821 // are not treated as scalar types. 822 return ET->getDecl()->isComplete(); 823 return isa<PointerType>(CanonicalType) || 824 isa<BlockPointerType>(CanonicalType) || 825 isa<MemberPointerType>(CanonicalType) || 826 isa<ComplexType>(CanonicalType) || 827 isa<ObjCObjectPointerType>(CanonicalType); 828} 829 830Type::ScalarTypeKind Type::getScalarTypeKind() const { 831 assert(isScalarType()); 832 833 const Type *T = CanonicalType.getTypePtr(); 834 if (const BuiltinType *BT = dyn_cast<BuiltinType>(T)) { 835 if (BT->getKind() == BuiltinType::Bool) return STK_Bool; 836 if (BT->getKind() == BuiltinType::NullPtr) return STK_CPointer; 837 if (BT->isInteger()) return STK_Integral; 838 if (BT->isFloatingPoint()) return STK_Floating; 839 llvm_unreachable("unknown scalar builtin type"); 840 } else if (isa<PointerType>(T)) { 841 return STK_CPointer; 842 } else if (isa<BlockPointerType>(T)) { 843 return STK_BlockPointer; 844 } else if (isa<ObjCObjectPointerType>(T)) { 845 return STK_ObjCObjectPointer; 846 } else if (isa<MemberPointerType>(T)) { 847 return STK_MemberPointer; 848 } else if (isa<EnumType>(T)) { 849 assert(cast<EnumType>(T)->getDecl()->isComplete()); 850 return STK_Integral; 851 } else if (const ComplexType *CT = dyn_cast<ComplexType>(T)) { 852 if (CT->getElementType()->isRealFloatingType()) 853 return STK_FloatingComplex; 854 return STK_IntegralComplex; 855 } 856 857 llvm_unreachable("unknown scalar type"); 858} 859 860/// \brief Determines whether the type is a C++ aggregate type or C 861/// aggregate or union type. 862/// 863/// An aggregate type is an array or a class type (struct, union, or 864/// class) that has no user-declared constructors, no private or 865/// protected non-static data members, no base classes, and no virtual 866/// functions (C++ [dcl.init.aggr]p1). The notion of an aggregate type 867/// subsumes the notion of C aggregates (C99 6.2.5p21) because it also 868/// includes union types. 869bool Type::isAggregateType() const { 870 if (const RecordType *Record = dyn_cast<RecordType>(CanonicalType)) { 871 if (CXXRecordDecl *ClassDecl = dyn_cast<CXXRecordDecl>(Record->getDecl())) 872 return ClassDecl->isAggregate(); 873 874 return true; 875 } 876 877 return isa<ArrayType>(CanonicalType); 878} 879 880/// isConstantSizeType - Return true if this is not a variable sized type, 881/// according to the rules of C99 6.7.5p3. It is not legal to call this on 882/// incomplete types or dependent types. 883bool Type::isConstantSizeType() const { 884 assert(!isIncompleteType() && "This doesn't make sense for incomplete types"); 885 assert(!isDependentType() && "This doesn't make sense for dependent types"); 886 // The VAT must have a size, as it is known to be complete. 887 return !isa<VariableArrayType>(CanonicalType); 888} 889 890/// isIncompleteType - Return true if this is an incomplete type (C99 6.2.5p1) 891/// - a type that can describe objects, but which lacks information needed to 892/// determine its size. 893bool Type::isIncompleteType() const { 894 switch (CanonicalType->getTypeClass()) { 895 default: return false; 896 case Builtin: 897 // Void is the only incomplete builtin type. Per C99 6.2.5p19, it can never 898 // be completed. 899 return isVoidType(); 900 case Enum: 901 // An enumeration with fixed underlying type is complete (C++0x 7.2p3). 902 if (cast<EnumType>(CanonicalType)->getDecl()->isFixed()) 903 return false; 904 // Fall through. 905 case Record: 906 // A tagged type (struct/union/enum/class) is incomplete if the decl is a 907 // forward declaration, but not a full definition (C99 6.2.5p22). 908 return !cast<TagType>(CanonicalType)->getDecl()->isDefinition(); 909 case ConstantArray: 910 // An array is incomplete if its element type is incomplete 911 // (C++ [dcl.array]p1). 912 // We don't handle variable arrays (they're not allowed in C++) or 913 // dependent-sized arrays (dependent types are never treated as incomplete). 914 return cast<ArrayType>(CanonicalType)->getElementType()->isIncompleteType(); 915 case IncompleteArray: 916 // An array of unknown size is an incomplete type (C99 6.2.5p22). 917 return true; 918 case ObjCObject: 919 return cast<ObjCObjectType>(CanonicalType)->getBaseType() 920 ->isIncompleteType(); 921 case ObjCInterface: 922 // ObjC interfaces are incomplete if they are @class, not @interface. 923 return cast<ObjCInterfaceType>(CanonicalType)->getDecl()->isForwardDecl(); 924 } 925} 926 927bool QualType::isPODType(ASTContext &Context) const { 928 // The compiler shouldn't query this for incomplete types, but the user might. 929 // We return false for that case. Except for incomplete arrays of PODs, which 930 // are PODs according to the standard. 931 if (isNull()) 932 return 0; 933 934 if ((*this)->isIncompleteArrayType()) 935 return Context.getBaseElementType(*this).isPODType(Context); 936 937 if ((*this)->isIncompleteType()) 938 return false; 939 940 if (Context.getLangOptions().ObjCAutoRefCount) { 941 switch (getObjCLifetime()) { 942 case Qualifiers::OCL_ExplicitNone: 943 return true; 944 945 case Qualifiers::OCL_Strong: 946 case Qualifiers::OCL_Weak: 947 case Qualifiers::OCL_Autoreleasing: 948 return false; 949 950 case Qualifiers::OCL_None: 951 break; 952 } 953 } 954 955 QualType CanonicalType = getTypePtr()->CanonicalType; 956 switch (CanonicalType->getTypeClass()) { 957 // Everything not explicitly mentioned is not POD. 958 default: return false; 959 case Type::VariableArray: 960 case Type::ConstantArray: 961 // IncompleteArray is handled above. 962 return Context.getBaseElementType(*this).isPODType(Context); 963 964 case Type::ObjCObjectPointer: 965 case Type::BlockPointer: 966 case Type::Builtin: 967 case Type::Complex: 968 case Type::Pointer: 969 case Type::MemberPointer: 970 case Type::Vector: 971 case Type::ExtVector: 972 return true; 973 974 case Type::Enum: 975 return true; 976 977 case Type::Record: 978 if (CXXRecordDecl *ClassDecl 979 = dyn_cast<CXXRecordDecl>(cast<RecordType>(CanonicalType)->getDecl())) 980 return ClassDecl->isPOD(); 981 982 // C struct/union is POD. 983 return true; 984 } 985} 986 987bool QualType::isTrivialType(ASTContext &Context) const { 988 // The compiler shouldn't query this for incomplete types, but the user might. 989 // We return false for that case. Except for incomplete arrays of PODs, which 990 // are PODs according to the standard. 991 if (isNull()) 992 return 0; 993 994 if ((*this)->isArrayType()) 995 return Context.getBaseElementType(*this).isTrivialType(Context); 996 997 // Return false for incomplete types after skipping any incomplete array 998 // types which are expressly allowed by the standard and thus our API. 999 if ((*this)->isIncompleteType()) 1000 return false; 1001 1002 if (Context.getLangOptions().ObjCAutoRefCount) { 1003 switch (getObjCLifetime()) { 1004 case Qualifiers::OCL_ExplicitNone: 1005 return true; 1006 1007 case Qualifiers::OCL_Strong: 1008 case Qualifiers::OCL_Weak: 1009 case Qualifiers::OCL_Autoreleasing: 1010 return false; 1011 1012 case Qualifiers::OCL_None: 1013 if ((*this)->isObjCLifetimeType()) 1014 return false; 1015 break; 1016 } 1017 } 1018 1019 QualType CanonicalType = getTypePtr()->CanonicalType; 1020 if (CanonicalType->isDependentType()) 1021 return false; 1022 1023 // C++0x [basic.types]p9: 1024 // Scalar types, trivial class types, arrays of such types, and 1025 // cv-qualified versions of these types are collectively called trivial 1026 // types. 1027 1028 // As an extension, Clang treats vector types as Scalar types. 1029 if (CanonicalType->isScalarType() || CanonicalType->isVectorType()) 1030 return true; 1031 if (const RecordType *RT = CanonicalType->getAs<RecordType>()) { 1032 if (const CXXRecordDecl *ClassDecl = 1033 dyn_cast<CXXRecordDecl>(RT->getDecl())) { 1034 // C++0x [class]p5: 1035 // A trivial class is a class that has a trivial default constructor 1036 if (!ClassDecl->hasTrivialDefaultConstructor()) return false; 1037 // and is trivially copyable. 1038 if (!ClassDecl->isTriviallyCopyable()) return false; 1039 } 1040 1041 return true; 1042 } 1043 1044 // No other types can match. 1045 return false; 1046} 1047 1048bool QualType::isTriviallyCopyableType(ASTContext &Context) const { 1049 if ((*this)->isArrayType()) 1050 return Context.getBaseElementType(*this).isTrivialType(Context); 1051 1052 if (Context.getLangOptions().ObjCAutoRefCount) { 1053 switch (getObjCLifetime()) { 1054 case Qualifiers::OCL_ExplicitNone: 1055 return true; 1056 1057 case Qualifiers::OCL_Strong: 1058 case Qualifiers::OCL_Weak: 1059 case Qualifiers::OCL_Autoreleasing: 1060 return false; 1061 1062 case Qualifiers::OCL_None: 1063 if ((*this)->isObjCLifetimeType()) 1064 return false; 1065 break; 1066 } 1067 } 1068 1069 // C++0x [basic.types]p9 1070 // Scalar types, trivially copyable class types, arrays of such types, and 1071 // cv-qualified versions of these types are collectively called trivial 1072 // types. 1073 1074 QualType CanonicalType = getCanonicalType(); 1075 if (CanonicalType->isDependentType()) 1076 return false; 1077 1078 // Return false for incomplete types after skipping any incomplete array types 1079 // which are expressly allowed by the standard and thus our API. 1080 if (CanonicalType->isIncompleteType()) 1081 return false; 1082 1083 // As an extension, Clang treats vector types as Scalar types. 1084 if (CanonicalType->isScalarType() || CanonicalType->isVectorType()) 1085 return true; 1086 1087 if (const RecordType *RT = CanonicalType->getAs<RecordType>()) { 1088 if (const CXXRecordDecl *ClassDecl = 1089 dyn_cast<CXXRecordDecl>(RT->getDecl())) { 1090 if (!ClassDecl->isTriviallyCopyable()) return false; 1091 } 1092 1093 return true; 1094 } 1095 1096 // No other types can match. 1097 return false; 1098} 1099 1100 1101 1102bool Type::isLiteralType() const { 1103 if (isDependentType()) 1104 return false; 1105 1106 // C++0x [basic.types]p10: 1107 // A type is a literal type if it is: 1108 // [...] 1109 // -- an array of literal type. 1110 // Extension: variable arrays cannot be literal types, since they're 1111 // runtime-sized. 1112 if (isVariableArrayType()) 1113 return false; 1114 const Type *BaseTy = getBaseElementTypeUnsafe(); 1115 assert(BaseTy && "NULL element type"); 1116 1117 // Return false for incomplete types after skipping any incomplete array 1118 // types; those are expressly allowed by the standard and thus our API. 1119 if (BaseTy->isIncompleteType()) 1120 return false; 1121 1122 // Objective-C lifetime types are not literal types. 1123 if (BaseTy->isObjCRetainableType()) 1124 return false; 1125 1126 // C++0x [basic.types]p10: 1127 // A type is a literal type if it is: 1128 // -- a scalar type; or 1129 // As an extension, Clang treats vector types as literal types. 1130 if (BaseTy->isScalarType() || BaseTy->isVectorType()) 1131 return true; 1132 // -- a reference type; or 1133 if (BaseTy->isReferenceType()) 1134 return true; 1135 // -- a class type that has all of the following properties: 1136 if (const RecordType *RT = BaseTy->getAs<RecordType>()) { 1137 // -- a trivial destructor, 1138 // -- every constructor call and full-expression in the 1139 // brace-or-equal-initializers for non-static data members (if any) 1140 // is a constant expression, 1141 // -- it is an aggregate type or has at least one constexpr 1142 // constructor or constructor template that is not a copy or move 1143 // constructor, and 1144 // -- all non-static data members and base classes of literal types 1145 // 1146 // We resolve DR1361 by ignoring the second bullet. 1147 if (const CXXRecordDecl *ClassDecl = 1148 dyn_cast<CXXRecordDecl>(RT->getDecl())) 1149 return ClassDecl->isLiteral(); 1150 1151 return true; 1152 } 1153 1154 return false; 1155} 1156 1157bool Type::isStandardLayoutType() const { 1158 if (isDependentType()) 1159 return false; 1160 1161 // C++0x [basic.types]p9: 1162 // Scalar types, standard-layout class types, arrays of such types, and 1163 // cv-qualified versions of these types are collectively called 1164 // standard-layout types. 1165 const Type *BaseTy = getBaseElementTypeUnsafe(); 1166 assert(BaseTy && "NULL element type"); 1167 1168 // Return false for incomplete types after skipping any incomplete array 1169 // types which are expressly allowed by the standard and thus our API. 1170 if (BaseTy->isIncompleteType()) 1171 return false; 1172 1173 // As an extension, Clang treats vector types as Scalar types. 1174 if (BaseTy->isScalarType() || BaseTy->isVectorType()) return true; 1175 if (const RecordType *RT = BaseTy->getAs<RecordType>()) { 1176 if (const CXXRecordDecl *ClassDecl = 1177 dyn_cast<CXXRecordDecl>(RT->getDecl())) 1178 if (!ClassDecl->isStandardLayout()) 1179 return false; 1180 1181 // Default to 'true' for non-C++ class types. 1182 // FIXME: This is a bit dubious, but plain C structs should trivially meet 1183 // all the requirements of standard layout classes. 1184 return true; 1185 } 1186 1187 // No other types can match. 1188 return false; 1189} 1190 1191// This is effectively the intersection of isTrivialType and 1192// isStandardLayoutType. We implement it directly to avoid redundant 1193// conversions from a type to a CXXRecordDecl. 1194bool QualType::isCXX11PODType(ASTContext &Context) const { 1195 const Type *ty = getTypePtr(); 1196 if (ty->isDependentType()) 1197 return false; 1198 1199 if (Context.getLangOptions().ObjCAutoRefCount) { 1200 switch (getObjCLifetime()) { 1201 case Qualifiers::OCL_ExplicitNone: 1202 return true; 1203 1204 case Qualifiers::OCL_Strong: 1205 case Qualifiers::OCL_Weak: 1206 case Qualifiers::OCL_Autoreleasing: 1207 return false; 1208 1209 case Qualifiers::OCL_None: 1210 if (ty->isObjCLifetimeType()) 1211 return false; 1212 break; 1213 } 1214 } 1215 1216 // C++11 [basic.types]p9: 1217 // Scalar types, POD classes, arrays of such types, and cv-qualified 1218 // versions of these types are collectively called trivial types. 1219 const Type *BaseTy = ty->getBaseElementTypeUnsafe(); 1220 assert(BaseTy && "NULL element type"); 1221 1222 // Return false for incomplete types after skipping any incomplete array 1223 // types which are expressly allowed by the standard and thus our API. 1224 if (BaseTy->isIncompleteType()) 1225 return false; 1226 1227 // As an extension, Clang treats vector types as Scalar types. 1228 if (BaseTy->isScalarType() || BaseTy->isVectorType()) return true; 1229 if (const RecordType *RT = BaseTy->getAs<RecordType>()) { 1230 if (const CXXRecordDecl *ClassDecl = 1231 dyn_cast<CXXRecordDecl>(RT->getDecl())) { 1232 // C++11 [class]p10: 1233 // A POD struct is a non-union class that is both a trivial class [...] 1234 if (!ClassDecl->isTrivial()) return false; 1235 1236 // C++11 [class]p10: 1237 // A POD struct is a non-union class that is both a trivial class and 1238 // a standard-layout class [...] 1239 if (!ClassDecl->isStandardLayout()) return false; 1240 1241 // C++11 [class]p10: 1242 // A POD struct is a non-union class that is both a trivial class and 1243 // a standard-layout class, and has no non-static data members of type 1244 // non-POD struct, non-POD union (or array of such types). [...] 1245 // 1246 // We don't directly query the recursive aspect as the requiremets for 1247 // both standard-layout classes and trivial classes apply recursively 1248 // already. 1249 } 1250 1251 return true; 1252 } 1253 1254 // No other types can match. 1255 return false; 1256} 1257 1258bool Type::isPromotableIntegerType() const { 1259 if (const BuiltinType *BT = getAs<BuiltinType>()) 1260 switch (BT->getKind()) { 1261 case BuiltinType::Bool: 1262 case BuiltinType::Char_S: 1263 case BuiltinType::Char_U: 1264 case BuiltinType::SChar: 1265 case BuiltinType::UChar: 1266 case BuiltinType::Short: 1267 case BuiltinType::UShort: 1268 return true; 1269 default: 1270 return false; 1271 } 1272 1273 // Enumerated types are promotable to their compatible integer types 1274 // (C99 6.3.1.1) a.k.a. its underlying type (C++ [conv.prom]p2). 1275 if (const EnumType *ET = getAs<EnumType>()){ 1276 if (this->isDependentType() || ET->getDecl()->getPromotionType().isNull() 1277 || ET->getDecl()->isScoped()) 1278 return false; 1279 1280 const BuiltinType *BT 1281 = ET->getDecl()->getPromotionType()->getAs<BuiltinType>(); 1282 return BT->getKind() == BuiltinType::Int 1283 || BT->getKind() == BuiltinType::UInt; 1284 } 1285 1286 return false; 1287} 1288 1289bool Type::isNullPtrType() const { 1290 if (const BuiltinType *BT = getAs<BuiltinType>()) 1291 return BT->getKind() == BuiltinType::NullPtr; 1292 return false; 1293} 1294 1295bool Type::isSpecifierType() const { 1296 // Note that this intentionally does not use the canonical type. 1297 switch (getTypeClass()) { 1298 case Builtin: 1299 case Record: 1300 case Enum: 1301 case Typedef: 1302 case Complex: 1303 case TypeOfExpr: 1304 case TypeOf: 1305 case TemplateTypeParm: 1306 case SubstTemplateTypeParm: 1307 case TemplateSpecialization: 1308 case Elaborated: 1309 case DependentName: 1310 case DependentTemplateSpecialization: 1311 case ObjCInterface: 1312 case ObjCObject: 1313 case ObjCObjectPointer: // FIXME: object pointers aren't really specifiers 1314 return true; 1315 default: 1316 return false; 1317 } 1318} 1319 1320ElaboratedTypeKeyword 1321TypeWithKeyword::getKeywordForTypeSpec(unsigned TypeSpec) { 1322 switch (TypeSpec) { 1323 default: return ETK_None; 1324 case TST_typename: return ETK_Typename; 1325 case TST_class: return ETK_Class; 1326 case TST_struct: return ETK_Struct; 1327 case TST_union: return ETK_Union; 1328 case TST_enum: return ETK_Enum; 1329 } 1330} 1331 1332TagTypeKind 1333TypeWithKeyword::getTagTypeKindForTypeSpec(unsigned TypeSpec) { 1334 switch(TypeSpec) { 1335 case TST_class: return TTK_Class; 1336 case TST_struct: return TTK_Struct; 1337 case TST_union: return TTK_Union; 1338 case TST_enum: return TTK_Enum; 1339 } 1340 1341 llvm_unreachable("Type specifier is not a tag type kind."); 1342 return TTK_Union; 1343} 1344 1345ElaboratedTypeKeyword 1346TypeWithKeyword::getKeywordForTagTypeKind(TagTypeKind Kind) { 1347 switch (Kind) { 1348 case TTK_Class: return ETK_Class; 1349 case TTK_Struct: return ETK_Struct; 1350 case TTK_Union: return ETK_Union; 1351 case TTK_Enum: return ETK_Enum; 1352 } 1353 llvm_unreachable("Unknown tag type kind."); 1354} 1355 1356TagTypeKind 1357TypeWithKeyword::getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword) { 1358 switch (Keyword) { 1359 case ETK_Class: return TTK_Class; 1360 case ETK_Struct: return TTK_Struct; 1361 case ETK_Union: return TTK_Union; 1362 case ETK_Enum: return TTK_Enum; 1363 case ETK_None: // Fall through. 1364 case ETK_Typename: 1365 llvm_unreachable("Elaborated type keyword is not a tag type kind."); 1366 } 1367 llvm_unreachable("Unknown elaborated type keyword."); 1368} 1369 1370bool 1371TypeWithKeyword::KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword) { 1372 switch (Keyword) { 1373 case ETK_None: 1374 case ETK_Typename: 1375 return false; 1376 case ETK_Class: 1377 case ETK_Struct: 1378 case ETK_Union: 1379 case ETK_Enum: 1380 return true; 1381 } 1382 llvm_unreachable("Unknown elaborated type keyword."); 1383} 1384 1385const char* 1386TypeWithKeyword::getKeywordName(ElaboratedTypeKeyword Keyword) { 1387 switch (Keyword) { 1388 case ETK_None: return ""; 1389 case ETK_Typename: return "typename"; 1390 case ETK_Class: return "class"; 1391 case ETK_Struct: return "struct"; 1392 case ETK_Union: return "union"; 1393 case ETK_Enum: return "enum"; 1394 } 1395 1396 llvm_unreachable("Unknown elaborated type keyword."); 1397 return ""; 1398} 1399 1400DependentTemplateSpecializationType::DependentTemplateSpecializationType( 1401 ElaboratedTypeKeyword Keyword, 1402 NestedNameSpecifier *NNS, const IdentifierInfo *Name, 1403 unsigned NumArgs, const TemplateArgument *Args, 1404 QualType Canon) 1405 : TypeWithKeyword(Keyword, DependentTemplateSpecialization, Canon, true, true, 1406 /*VariablyModified=*/false, 1407 NNS && NNS->containsUnexpandedParameterPack()), 1408 NNS(NNS), Name(Name), NumArgs(NumArgs) { 1409 assert((!NNS || NNS->isDependent()) && 1410 "DependentTemplateSpecializatonType requires dependent qualifier"); 1411 for (unsigned I = 0; I != NumArgs; ++I) { 1412 if (Args[I].containsUnexpandedParameterPack()) 1413 setContainsUnexpandedParameterPack(); 1414 1415 new (&getArgBuffer()[I]) TemplateArgument(Args[I]); 1416 } 1417} 1418 1419void 1420DependentTemplateSpecializationType::Profile(llvm::FoldingSetNodeID &ID, 1421 const ASTContext &Context, 1422 ElaboratedTypeKeyword Keyword, 1423 NestedNameSpecifier *Qualifier, 1424 const IdentifierInfo *Name, 1425 unsigned NumArgs, 1426 const TemplateArgument *Args) { 1427 ID.AddInteger(Keyword); 1428 ID.AddPointer(Qualifier); 1429 ID.AddPointer(Name); 1430 for (unsigned Idx = 0; Idx < NumArgs; ++Idx) 1431 Args[Idx].Profile(ID, Context); 1432} 1433 1434bool Type::isElaboratedTypeSpecifier() const { 1435 ElaboratedTypeKeyword Keyword; 1436 if (const ElaboratedType *Elab = dyn_cast<ElaboratedType>(this)) 1437 Keyword = Elab->getKeyword(); 1438 else if (const DependentNameType *DepName = dyn_cast<DependentNameType>(this)) 1439 Keyword = DepName->getKeyword(); 1440 else if (const DependentTemplateSpecializationType *DepTST = 1441 dyn_cast<DependentTemplateSpecializationType>(this)) 1442 Keyword = DepTST->getKeyword(); 1443 else 1444 return false; 1445 1446 return TypeWithKeyword::KeywordIsTagTypeKind(Keyword); 1447} 1448 1449const char *Type::getTypeClassName() const { 1450 switch (TypeBits.TC) { 1451#define ABSTRACT_TYPE(Derived, Base) 1452#define TYPE(Derived, Base) case Derived: return #Derived; 1453#include "clang/AST/TypeNodes.def" 1454 } 1455 1456 llvm_unreachable("Invalid type class."); 1457 return 0; 1458} 1459 1460const char *BuiltinType::getName(const PrintingPolicy &Policy) const { 1461 switch (getKind()) { 1462 case Void: return "void"; 1463 case Bool: return Policy.Bool ? "bool" : "_Bool"; 1464 case Char_S: return "char"; 1465 case Char_U: return "char"; 1466 case SChar: return "signed char"; 1467 case Short: return "short"; 1468 case Int: return "int"; 1469 case Long: return "long"; 1470 case LongLong: return "long long"; 1471 case Int128: return "__int128_t"; 1472 case UChar: return "unsigned char"; 1473 case UShort: return "unsigned short"; 1474 case UInt: return "unsigned int"; 1475 case ULong: return "unsigned long"; 1476 case ULongLong: return "unsigned long long"; 1477 case UInt128: return "__uint128_t"; 1478 case Float: return "float"; 1479 case Double: return "double"; 1480 case LongDouble: return "long double"; 1481 case WChar_S: 1482 case WChar_U: return "wchar_t"; 1483 case Char16: return "char16_t"; 1484 case Char32: return "char32_t"; 1485 case NullPtr: return "nullptr_t"; 1486 case Overload: return "<overloaded function type>"; 1487 case BoundMember: return "<bound member function type>"; 1488 case Dependent: return "<dependent type>"; 1489 case UnknownAny: return "<unknown type>"; 1490 case ObjCId: return "id"; 1491 case ObjCClass: return "Class"; 1492 case ObjCSel: return "SEL"; 1493 } 1494 1495 llvm_unreachable("Invalid builtin type."); 1496 return 0; 1497} 1498 1499QualType QualType::getNonLValueExprType(ASTContext &Context) const { 1500 if (const ReferenceType *RefType = getTypePtr()->getAs<ReferenceType>()) 1501 return RefType->getPointeeType(); 1502 1503 // C++0x [basic.lval]: 1504 // Class prvalues can have cv-qualified types; non-class prvalues always 1505 // have cv-unqualified types. 1506 // 1507 // See also C99 6.3.2.1p2. 1508 if (!Context.getLangOptions().CPlusPlus || 1509 (!getTypePtr()->isDependentType() && !getTypePtr()->isRecordType())) 1510 return getUnqualifiedType(); 1511 1512 return *this; 1513} 1514 1515StringRef FunctionType::getNameForCallConv(CallingConv CC) { 1516 switch (CC) { 1517 case CC_Default: 1518 llvm_unreachable("no name for default cc"); 1519 return ""; 1520 1521 case CC_C: return "cdecl"; 1522 case CC_X86StdCall: return "stdcall"; 1523 case CC_X86FastCall: return "fastcall"; 1524 case CC_X86ThisCall: return "thiscall"; 1525 case CC_X86Pascal: return "pascal"; 1526 case CC_AAPCS: return "aapcs"; 1527 case CC_AAPCS_VFP: return "aapcs-vfp"; 1528 } 1529 1530 llvm_unreachable("Invalid calling convention."); 1531 return ""; 1532} 1533 1534FunctionProtoType::FunctionProtoType(QualType result, const QualType *args, 1535 unsigned numArgs, QualType canonical, 1536 const ExtProtoInfo &epi) 1537 : FunctionType(FunctionProto, result, epi.Variadic, epi.TypeQuals, 1538 epi.RefQualifier, canonical, 1539 result->isDependentType(), 1540 result->isInstantiationDependentType(), 1541 result->isVariablyModifiedType(), 1542 result->containsUnexpandedParameterPack(), 1543 epi.ExtInfo), 1544 NumArgs(numArgs), NumExceptions(epi.NumExceptions), 1545 ExceptionSpecType(epi.ExceptionSpecType), 1546 HasAnyConsumedArgs(epi.ConsumedArguments != 0) 1547{ 1548 // Fill in the trailing argument array. 1549 QualType *argSlot = reinterpret_cast<QualType*>(this+1); 1550 for (unsigned i = 0; i != numArgs; ++i) { 1551 if (args[i]->isDependentType()) 1552 setDependent(); 1553 else if (args[i]->isInstantiationDependentType()) 1554 setInstantiationDependent(); 1555 1556 if (args[i]->containsUnexpandedParameterPack()) 1557 setContainsUnexpandedParameterPack(); 1558 1559 argSlot[i] = args[i]; 1560 } 1561 1562 if (getExceptionSpecType() == EST_Dynamic) { 1563 // Fill in the exception array. 1564 QualType *exnSlot = argSlot + numArgs; 1565 for (unsigned i = 0, e = epi.NumExceptions; i != e; ++i) { 1566 if (epi.Exceptions[i]->isDependentType()) 1567 setDependent(); 1568 else if (epi.Exceptions[i]->isInstantiationDependentType()) 1569 setInstantiationDependent(); 1570 1571 if (epi.Exceptions[i]->containsUnexpandedParameterPack()) 1572 setContainsUnexpandedParameterPack(); 1573 1574 exnSlot[i] = epi.Exceptions[i]; 1575 } 1576 } else if (getExceptionSpecType() == EST_ComputedNoexcept) { 1577 // Store the noexcept expression and context. 1578 Expr **noexSlot = reinterpret_cast<Expr**>(argSlot + numArgs); 1579 *noexSlot = epi.NoexceptExpr; 1580 1581 if (epi.NoexceptExpr) { 1582 if (epi.NoexceptExpr->isValueDependent() 1583 || epi.NoexceptExpr->isTypeDependent()) 1584 setDependent(); 1585 else if (epi.NoexceptExpr->isInstantiationDependent()) 1586 setInstantiationDependent(); 1587 } 1588 } 1589 1590 if (epi.ConsumedArguments) { 1591 bool *consumedArgs = const_cast<bool*>(getConsumedArgsBuffer()); 1592 for (unsigned i = 0; i != numArgs; ++i) 1593 consumedArgs[i] = epi.ConsumedArguments[i]; 1594 } 1595} 1596 1597FunctionProtoType::NoexceptResult 1598FunctionProtoType::getNoexceptSpec(ASTContext &ctx) const { 1599 ExceptionSpecificationType est = getExceptionSpecType(); 1600 if (est == EST_BasicNoexcept) 1601 return NR_Nothrow; 1602 1603 if (est != EST_ComputedNoexcept) 1604 return NR_NoNoexcept; 1605 1606 Expr *noexceptExpr = getNoexceptExpr(); 1607 if (!noexceptExpr) 1608 return NR_BadNoexcept; 1609 if (noexceptExpr->isValueDependent()) 1610 return NR_Dependent; 1611 1612 llvm::APSInt value; 1613 bool isICE = noexceptExpr->isIntegerConstantExpr(value, ctx, 0, 1614 /*evaluated*/false); 1615 (void)isICE; 1616 assert(isICE && "AST should not contain bad noexcept expressions."); 1617 1618 return value.getBoolValue() ? NR_Nothrow : NR_Throw; 1619} 1620 1621bool FunctionProtoType::isTemplateVariadic() const { 1622 for (unsigned ArgIdx = getNumArgs(); ArgIdx; --ArgIdx) 1623 if (isa<PackExpansionType>(getArgType(ArgIdx - 1))) 1624 return true; 1625 1626 return false; 1627} 1628 1629void FunctionProtoType::Profile(llvm::FoldingSetNodeID &ID, QualType Result, 1630 const QualType *ArgTys, unsigned NumArgs, 1631 const ExtProtoInfo &epi, 1632 const ASTContext &Context) { 1633 1634 // We have to be careful not to get ambiguous profile encodings. 1635 // Note that valid type pointers are never ambiguous with anything else. 1636 // 1637 // The encoding grammar begins: 1638 // type type* bool int bool 1639 // If that final bool is true, then there is a section for the EH spec: 1640 // bool type* 1641 // This is followed by an optional "consumed argument" section of the 1642 // same length as the first type sequence: 1643 // bool* 1644 // Finally, we have the ext info: 1645 // int 1646 // 1647 // There is no ambiguity between the consumed arguments and an empty EH 1648 // spec because of the leading 'bool' which unambiguously indicates 1649 // whether the following bool is the EH spec or part of the arguments. 1650 1651 ID.AddPointer(Result.getAsOpaquePtr()); 1652 for (unsigned i = 0; i != NumArgs; ++i) 1653 ID.AddPointer(ArgTys[i].getAsOpaquePtr()); 1654 // This method is relatively performance sensitive, so as a performance 1655 // shortcut, use one AddInteger call instead of four for the next four 1656 // fields. 1657 assert(!(unsigned(epi.Variadic) & ~1) && 1658 !(unsigned(epi.TypeQuals) & ~255) && 1659 !(unsigned(epi.RefQualifier) & ~3) && 1660 !(unsigned(epi.ExceptionSpecType) & ~7) && 1661 "Values larger than expected."); 1662 ID.AddInteger(unsigned(epi.Variadic) + 1663 (epi.TypeQuals << 1) + 1664 (epi.RefQualifier << 9) + 1665 (epi.ExceptionSpecType << 11)); 1666 if (epi.ExceptionSpecType == EST_Dynamic) { 1667 for (unsigned i = 0; i != epi.NumExceptions; ++i) 1668 ID.AddPointer(epi.Exceptions[i].getAsOpaquePtr()); 1669 } else if (epi.ExceptionSpecType == EST_ComputedNoexcept && epi.NoexceptExpr){ 1670 epi.NoexceptExpr->Profile(ID, Context, false); 1671 } 1672 if (epi.ConsumedArguments) { 1673 for (unsigned i = 0; i != NumArgs; ++i) 1674 ID.AddBoolean(epi.ConsumedArguments[i]); 1675 } 1676 epi.ExtInfo.Profile(ID); 1677} 1678 1679void FunctionProtoType::Profile(llvm::FoldingSetNodeID &ID, 1680 const ASTContext &Ctx) { 1681 Profile(ID, getResultType(), arg_type_begin(), NumArgs, getExtProtoInfo(), 1682 Ctx); 1683} 1684 1685QualType TypedefType::desugar() const { 1686 return getDecl()->getUnderlyingType(); 1687} 1688 1689TypeOfExprType::TypeOfExprType(Expr *E, QualType can) 1690 : Type(TypeOfExpr, can, E->isTypeDependent(), 1691 E->isInstantiationDependent(), 1692 E->getType()->isVariablyModifiedType(), 1693 E->containsUnexpandedParameterPack()), 1694 TOExpr(E) { 1695} 1696 1697bool TypeOfExprType::isSugared() const { 1698 return !TOExpr->isTypeDependent(); 1699} 1700 1701QualType TypeOfExprType::desugar() const { 1702 if (isSugared()) 1703 return getUnderlyingExpr()->getType(); 1704 1705 return QualType(this, 0); 1706} 1707 1708void DependentTypeOfExprType::Profile(llvm::FoldingSetNodeID &ID, 1709 const ASTContext &Context, Expr *E) { 1710 E->Profile(ID, Context, true); 1711} 1712 1713DecltypeType::DecltypeType(Expr *E, QualType underlyingType, QualType can) 1714 : Type(Decltype, can, E->isTypeDependent(), 1715 E->isInstantiationDependent(), 1716 E->getType()->isVariablyModifiedType(), 1717 E->containsUnexpandedParameterPack()), 1718 E(E), 1719 UnderlyingType(underlyingType) { 1720} 1721 1722bool DecltypeType::isSugared() const { return !E->isInstantiationDependent(); } 1723 1724QualType DecltypeType::desugar() const { 1725 if (isSugared()) 1726 return getUnderlyingType(); 1727 1728 return QualType(this, 0); 1729} 1730 1731DependentDecltypeType::DependentDecltypeType(const ASTContext &Context, Expr *E) 1732 : DecltypeType(E, Context.DependentTy), Context(Context) { } 1733 1734void DependentDecltypeType::Profile(llvm::FoldingSetNodeID &ID, 1735 const ASTContext &Context, Expr *E) { 1736 E->Profile(ID, Context, true); 1737} 1738 1739TagType::TagType(TypeClass TC, const TagDecl *D, QualType can) 1740 : Type(TC, can, D->isDependentType(), 1741 /*InstantiationDependent=*/D->isDependentType(), 1742 /*VariablyModified=*/false, 1743 /*ContainsUnexpandedParameterPack=*/false), 1744 decl(const_cast<TagDecl*>(D)) {} 1745 1746static TagDecl *getInterestingTagDecl(TagDecl *decl) { 1747 for (TagDecl::redecl_iterator I = decl->redecls_begin(), 1748 E = decl->redecls_end(); 1749 I != E; ++I) { 1750 if (I->isDefinition() || I->isBeingDefined()) 1751 return *I; 1752 } 1753 // If there's no definition (not even in progress), return what we have. 1754 return decl; 1755} 1756 1757UnaryTransformType::UnaryTransformType(QualType BaseType, 1758 QualType UnderlyingType, 1759 UTTKind UKind, 1760 QualType CanonicalType) 1761 : Type(UnaryTransform, CanonicalType, UnderlyingType->isDependentType(), 1762 UnderlyingType->isInstantiationDependentType(), 1763 UnderlyingType->isVariablyModifiedType(), 1764 BaseType->containsUnexpandedParameterPack()) 1765 , BaseType(BaseType), UnderlyingType(UnderlyingType), UKind(UKind) 1766{} 1767 1768TagDecl *TagType::getDecl() const { 1769 return getInterestingTagDecl(decl); 1770} 1771 1772bool TagType::isBeingDefined() const { 1773 return getDecl()->isBeingDefined(); 1774} 1775 1776CXXRecordDecl *InjectedClassNameType::getDecl() const { 1777 return cast<CXXRecordDecl>(getInterestingTagDecl(Decl)); 1778} 1779 1780bool RecordType::classof(const TagType *TT) { 1781 return isa<RecordDecl>(TT->getDecl()); 1782} 1783 1784bool EnumType::classof(const TagType *TT) { 1785 return isa<EnumDecl>(TT->getDecl()); 1786} 1787 1788IdentifierInfo *TemplateTypeParmType::getIdentifier() const { 1789 return isCanonicalUnqualified() ? 0 : getDecl()->getIdentifier(); 1790} 1791 1792SubstTemplateTypeParmPackType:: 1793SubstTemplateTypeParmPackType(const TemplateTypeParmType *Param, 1794 QualType Canon, 1795 const TemplateArgument &ArgPack) 1796 : Type(SubstTemplateTypeParmPack, Canon, true, true, false, true), 1797 Replaced(Param), 1798 Arguments(ArgPack.pack_begin()), NumArguments(ArgPack.pack_size()) 1799{ 1800} 1801 1802TemplateArgument SubstTemplateTypeParmPackType::getArgumentPack() const { 1803 return TemplateArgument(Arguments, NumArguments); 1804} 1805 1806void SubstTemplateTypeParmPackType::Profile(llvm::FoldingSetNodeID &ID) { 1807 Profile(ID, getReplacedParameter(), getArgumentPack()); 1808} 1809 1810void SubstTemplateTypeParmPackType::Profile(llvm::FoldingSetNodeID &ID, 1811 const TemplateTypeParmType *Replaced, 1812 const TemplateArgument &ArgPack) { 1813 ID.AddPointer(Replaced); 1814 ID.AddInteger(ArgPack.pack_size()); 1815 for (TemplateArgument::pack_iterator P = ArgPack.pack_begin(), 1816 PEnd = ArgPack.pack_end(); 1817 P != PEnd; ++P) 1818 ID.AddPointer(P->getAsType().getAsOpaquePtr()); 1819} 1820 1821bool TemplateSpecializationType:: 1822anyDependentTemplateArguments(const TemplateArgumentListInfo &Args, 1823 bool &InstantiationDependent) { 1824 return anyDependentTemplateArguments(Args.getArgumentArray(), Args.size(), 1825 InstantiationDependent); 1826} 1827 1828bool TemplateSpecializationType:: 1829anyDependentTemplateArguments(const TemplateArgumentLoc *Args, unsigned N, 1830 bool &InstantiationDependent) { 1831 for (unsigned i = 0; i != N; ++i) { 1832 if (Args[i].getArgument().isDependent()) { 1833 InstantiationDependent = true; 1834 return true; 1835 } 1836 1837 if (Args[i].getArgument().isInstantiationDependent()) 1838 InstantiationDependent = true; 1839 } 1840 return false; 1841} 1842 1843bool TemplateSpecializationType:: 1844anyDependentTemplateArguments(const TemplateArgument *Args, unsigned N, 1845 bool &InstantiationDependent) { 1846 for (unsigned i = 0; i != N; ++i) { 1847 if (Args[i].isDependent()) { 1848 InstantiationDependent = true; 1849 return true; 1850 } 1851 1852 if (Args[i].isInstantiationDependent()) 1853 InstantiationDependent = true; 1854 } 1855 return false; 1856} 1857 1858TemplateSpecializationType:: 1859TemplateSpecializationType(TemplateName T, 1860 const TemplateArgument *Args, unsigned NumArgs, 1861 QualType Canon, QualType AliasedType) 1862 : Type(TemplateSpecialization, 1863 Canon.isNull()? QualType(this, 0) : Canon, 1864 Canon.isNull()? T.isDependent() : Canon->isDependentType(), 1865 Canon.isNull()? T.isDependent() 1866 : Canon->isInstantiationDependentType(), 1867 false, T.containsUnexpandedParameterPack()), 1868 Template(T), NumArgs(NumArgs) { 1869 assert(!T.getAsDependentTemplateName() && 1870 "Use DependentTemplateSpecializationType for dependent template-name"); 1871 assert((T.getKind() == TemplateName::Template || 1872 T.getKind() == TemplateName::SubstTemplateTemplateParm || 1873 T.getKind() == TemplateName::SubstTemplateTemplateParmPack) && 1874 "Unexpected template name for TemplateSpecializationType"); 1875 bool InstantiationDependent; 1876 (void)InstantiationDependent; 1877 assert((!Canon.isNull() || 1878 T.isDependent() || 1879 anyDependentTemplateArguments(Args, NumArgs, 1880 InstantiationDependent)) && 1881 "No canonical type for non-dependent class template specialization"); 1882 1883 TemplateArgument *TemplateArgs 1884 = reinterpret_cast<TemplateArgument *>(this + 1); 1885 for (unsigned Arg = 0; Arg < NumArgs; ++Arg) { 1886 // Update dependent and variably-modified bits. 1887 // If the canonical type exists and is non-dependent, the template 1888 // specialization type can be non-dependent even if one of the type 1889 // arguments is. Given: 1890 // template<typename T> using U = int; 1891 // U<T> is always non-dependent, irrespective of the type T. 1892 if (Canon.isNull() && Args[Arg].isDependent()) 1893 setDependent(); 1894 else if (Args[Arg].isInstantiationDependent()) 1895 setInstantiationDependent(); 1896 1897 if (Args[Arg].getKind() == TemplateArgument::Type && 1898 Args[Arg].getAsType()->isVariablyModifiedType()) 1899 setVariablyModified(); 1900 if (Args[Arg].containsUnexpandedParameterPack()) 1901 setContainsUnexpandedParameterPack(); 1902 1903 new (&TemplateArgs[Arg]) TemplateArgument(Args[Arg]); 1904 } 1905 1906 // Store the aliased type if this is a type alias template specialization. 1907 bool IsTypeAlias = !AliasedType.isNull(); 1908 assert(IsTypeAlias == isTypeAlias() && 1909 "allocated wrong size for type alias"); 1910 if (IsTypeAlias) { 1911 TemplateArgument *Begin = reinterpret_cast<TemplateArgument *>(this + 1); 1912 *reinterpret_cast<QualType*>(Begin + getNumArgs()) = AliasedType; 1913 } 1914} 1915 1916void 1917TemplateSpecializationType::Profile(llvm::FoldingSetNodeID &ID, 1918 TemplateName T, 1919 const TemplateArgument *Args, 1920 unsigned NumArgs, 1921 const ASTContext &Context) { 1922 T.Profile(ID); 1923 for (unsigned Idx = 0; Idx < NumArgs; ++Idx) 1924 Args[Idx].Profile(ID, Context); 1925} 1926 1927bool TemplateSpecializationType::isTypeAlias() const { 1928 TemplateDecl *D = Template.getAsTemplateDecl(); 1929 return D && isa<TypeAliasTemplateDecl>(D); 1930} 1931 1932QualType 1933QualifierCollector::apply(const ASTContext &Context, QualType QT) const { 1934 if (!hasNonFastQualifiers()) 1935 return QT.withFastQualifiers(getFastQualifiers()); 1936 1937 return Context.getQualifiedType(QT, *this); 1938} 1939 1940QualType 1941QualifierCollector::apply(const ASTContext &Context, const Type *T) const { 1942 if (!hasNonFastQualifiers()) 1943 return QualType(T, getFastQualifiers()); 1944 1945 return Context.getQualifiedType(T, *this); 1946} 1947 1948void ObjCObjectTypeImpl::Profile(llvm::FoldingSetNodeID &ID, 1949 QualType BaseType, 1950 ObjCProtocolDecl * const *Protocols, 1951 unsigned NumProtocols) { 1952 ID.AddPointer(BaseType.getAsOpaquePtr()); 1953 for (unsigned i = 0; i != NumProtocols; i++) 1954 ID.AddPointer(Protocols[i]); 1955} 1956 1957void ObjCObjectTypeImpl::Profile(llvm::FoldingSetNodeID &ID) { 1958 Profile(ID, getBaseType(), qual_begin(), getNumProtocols()); 1959} 1960 1961namespace { 1962 1963/// \brief The cached properties of a type. 1964class CachedProperties { 1965 char linkage; 1966 char visibility; 1967 bool local; 1968 1969public: 1970 CachedProperties(Linkage linkage, Visibility visibility, bool local) 1971 : linkage(linkage), visibility(visibility), local(local) {} 1972 1973 Linkage getLinkage() const { return (Linkage) linkage; } 1974 Visibility getVisibility() const { return (Visibility) visibility; } 1975 bool hasLocalOrUnnamedType() const { return local; } 1976 1977 friend CachedProperties merge(CachedProperties L, CachedProperties R) { 1978 return CachedProperties(minLinkage(L.getLinkage(), R.getLinkage()), 1979 minVisibility(L.getVisibility(), R.getVisibility()), 1980 L.hasLocalOrUnnamedType() | R.hasLocalOrUnnamedType()); 1981 } 1982}; 1983} 1984 1985static CachedProperties computeCachedProperties(const Type *T); 1986 1987namespace clang { 1988/// The type-property cache. This is templated so as to be 1989/// instantiated at an internal type to prevent unnecessary symbol 1990/// leakage. 1991template <class Private> class TypePropertyCache { 1992public: 1993 static CachedProperties get(QualType T) { 1994 return get(T.getTypePtr()); 1995 } 1996 1997 static CachedProperties get(const Type *T) { 1998 ensure(T); 1999 return CachedProperties(T->TypeBits.getLinkage(), 2000 T->TypeBits.getVisibility(), 2001 T->TypeBits.hasLocalOrUnnamedType()); 2002 } 2003 2004 static void ensure(const Type *T) { 2005 // If the cache is valid, we're okay. 2006 if (T->TypeBits.isCacheValid()) return; 2007 2008 // If this type is non-canonical, ask its canonical type for the 2009 // relevant information. 2010 if (!T->isCanonicalUnqualified()) { 2011 const Type *CT = T->getCanonicalTypeInternal().getTypePtr(); 2012 ensure(CT); 2013 T->TypeBits.CacheValidAndVisibility = 2014 CT->TypeBits.CacheValidAndVisibility; 2015 T->TypeBits.CachedLinkage = CT->TypeBits.CachedLinkage; 2016 T->TypeBits.CachedLocalOrUnnamed = CT->TypeBits.CachedLocalOrUnnamed; 2017 return; 2018 } 2019 2020 // Compute the cached properties and then set the cache. 2021 CachedProperties Result = computeCachedProperties(T); 2022 T->TypeBits.CacheValidAndVisibility = Result.getVisibility() + 1U; 2023 assert(T->TypeBits.isCacheValid() && 2024 T->TypeBits.getVisibility() == Result.getVisibility()); 2025 T->TypeBits.CachedLinkage = Result.getLinkage(); 2026 T->TypeBits.CachedLocalOrUnnamed = Result.hasLocalOrUnnamedType(); 2027 } 2028}; 2029} 2030 2031// Instantiate the friend template at a private class. In a 2032// reasonable implementation, these symbols will be internal. 2033// It is terrible that this is the best way to accomplish this. 2034namespace { class Private {}; } 2035typedef TypePropertyCache<Private> Cache; 2036 2037static CachedProperties computeCachedProperties(const Type *T) { 2038 switch (T->getTypeClass()) { 2039#define TYPE(Class,Base) 2040#define NON_CANONICAL_TYPE(Class,Base) case Type::Class: 2041#include "clang/AST/TypeNodes.def" 2042 llvm_unreachable("didn't expect a non-canonical type here"); 2043 2044#define TYPE(Class,Base) 2045#define DEPENDENT_TYPE(Class,Base) case Type::Class: 2046#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class,Base) case Type::Class: 2047#include "clang/AST/TypeNodes.def" 2048 // Treat instantiation-dependent types as external. 2049 assert(T->isInstantiationDependentType()); 2050 return CachedProperties(ExternalLinkage, DefaultVisibility, false); 2051 2052 case Type::Builtin: 2053 // C++ [basic.link]p8: 2054 // A type is said to have linkage if and only if: 2055 // - it is a fundamental type (3.9.1); or 2056 return CachedProperties(ExternalLinkage, DefaultVisibility, false); 2057 2058 case Type::Record: 2059 case Type::Enum: { 2060 const TagDecl *Tag = cast<TagType>(T)->getDecl(); 2061 2062 // C++ [basic.link]p8: 2063 // - it is a class or enumeration type that is named (or has a name 2064 // for linkage purposes (7.1.3)) and the name has linkage; or 2065 // - it is a specialization of a class template (14); or 2066 NamedDecl::LinkageInfo LV = Tag->getLinkageAndVisibility(); 2067 bool IsLocalOrUnnamed = 2068 Tag->getDeclContext()->isFunctionOrMethod() || 2069 (!Tag->getIdentifier() && !Tag->getTypedefNameForAnonDecl()); 2070 return CachedProperties(LV.linkage(), LV.visibility(), IsLocalOrUnnamed); 2071 } 2072 2073 // C++ [basic.link]p8: 2074 // - it is a compound type (3.9.2) other than a class or enumeration, 2075 // compounded exclusively from types that have linkage; or 2076 case Type::Complex: 2077 return Cache::get(cast<ComplexType>(T)->getElementType()); 2078 case Type::Pointer: 2079 return Cache::get(cast<PointerType>(T)->getPointeeType()); 2080 case Type::BlockPointer: 2081 return Cache::get(cast<BlockPointerType>(T)->getPointeeType()); 2082 case Type::LValueReference: 2083 case Type::RValueReference: 2084 return Cache::get(cast<ReferenceType>(T)->getPointeeType()); 2085 case Type::MemberPointer: { 2086 const MemberPointerType *MPT = cast<MemberPointerType>(T); 2087 return merge(Cache::get(MPT->getClass()), 2088 Cache::get(MPT->getPointeeType())); 2089 } 2090 case Type::ConstantArray: 2091 case Type::IncompleteArray: 2092 case Type::VariableArray: 2093 return Cache::get(cast<ArrayType>(T)->getElementType()); 2094 case Type::Vector: 2095 case Type::ExtVector: 2096 return Cache::get(cast<VectorType>(T)->getElementType()); 2097 case Type::FunctionNoProto: 2098 return Cache::get(cast<FunctionType>(T)->getResultType()); 2099 case Type::FunctionProto: { 2100 const FunctionProtoType *FPT = cast<FunctionProtoType>(T); 2101 CachedProperties result = Cache::get(FPT->getResultType()); 2102 for (FunctionProtoType::arg_type_iterator ai = FPT->arg_type_begin(), 2103 ae = FPT->arg_type_end(); ai != ae; ++ai) 2104 result = merge(result, Cache::get(*ai)); 2105 return result; 2106 } 2107 case Type::ObjCInterface: { 2108 NamedDecl::LinkageInfo LV = 2109 cast<ObjCInterfaceType>(T)->getDecl()->getLinkageAndVisibility(); 2110 return CachedProperties(LV.linkage(), LV.visibility(), false); 2111 } 2112 case Type::ObjCObject: 2113 return Cache::get(cast<ObjCObjectType>(T)->getBaseType()); 2114 case Type::ObjCObjectPointer: 2115 return Cache::get(cast<ObjCObjectPointerType>(T)->getPointeeType()); 2116 } 2117 2118 llvm_unreachable("unhandled type class"); 2119 2120 // C++ [basic.link]p8: 2121 // Names not covered by these rules have no linkage. 2122 return CachedProperties(NoLinkage, DefaultVisibility, false); 2123} 2124 2125/// \brief Determine the linkage of this type. 2126Linkage Type::getLinkage() const { 2127 Cache::ensure(this); 2128 return TypeBits.getLinkage(); 2129} 2130 2131/// \brief Determine the linkage of this type. 2132Visibility Type::getVisibility() const { 2133 Cache::ensure(this); 2134 return TypeBits.getVisibility(); 2135} 2136 2137bool Type::hasUnnamedOrLocalType() const { 2138 Cache::ensure(this); 2139 return TypeBits.hasLocalOrUnnamedType(); 2140} 2141 2142std::pair<Linkage,Visibility> Type::getLinkageAndVisibility() const { 2143 Cache::ensure(this); 2144 return std::make_pair(TypeBits.getLinkage(), TypeBits.getVisibility()); 2145} 2146 2147void Type::ClearLinkageCache() { 2148 TypeBits.CacheValidAndVisibility = 0; 2149 if (QualType(this, 0) != CanonicalType) 2150 CanonicalType->TypeBits.CacheValidAndVisibility = 0; 2151} 2152 2153Qualifiers::ObjCLifetime Type::getObjCARCImplicitLifetime() const { 2154 if (isObjCARCImplicitlyUnretainedType()) 2155 return Qualifiers::OCL_ExplicitNone; 2156 return Qualifiers::OCL_Strong; 2157} 2158 2159bool Type::isObjCARCImplicitlyUnretainedType() const { 2160 assert(isObjCLifetimeType() && 2161 "cannot query implicit lifetime for non-inferrable type"); 2162 2163 const Type *canon = getCanonicalTypeInternal().getTypePtr(); 2164 2165 // Walk down to the base type. We don't care about qualifiers for this. 2166 while (const ArrayType *array = dyn_cast<ArrayType>(canon)) 2167 canon = array->getElementType().getTypePtr(); 2168 2169 if (const ObjCObjectPointerType *opt 2170 = dyn_cast<ObjCObjectPointerType>(canon)) { 2171 // Class and Class<Protocol> don't require retension. 2172 if (opt->getObjectType()->isObjCClass()) 2173 return true; 2174 } 2175 2176 return false; 2177} 2178 2179bool Type::isObjCNSObjectType() const { 2180 if (const TypedefType *typedefType = dyn_cast<TypedefType>(this)) 2181 return typedefType->getDecl()->hasAttr<ObjCNSObjectAttr>(); 2182 return false; 2183} 2184bool Type::isObjCRetainableType() const { 2185 return isObjCObjectPointerType() || 2186 isBlockPointerType() || 2187 isObjCNSObjectType(); 2188} 2189bool Type::isObjCIndirectLifetimeType() const { 2190 if (isObjCLifetimeType()) 2191 return true; 2192 if (const PointerType *OPT = getAs<PointerType>()) 2193 return OPT->getPointeeType()->isObjCIndirectLifetimeType(); 2194 if (const ReferenceType *Ref = getAs<ReferenceType>()) 2195 return Ref->getPointeeType()->isObjCIndirectLifetimeType(); 2196 if (const MemberPointerType *MemPtr = getAs<MemberPointerType>()) 2197 return MemPtr->getPointeeType()->isObjCIndirectLifetimeType(); 2198 return false; 2199} 2200 2201/// Returns true if objects of this type have lifetime semantics under 2202/// ARC. 2203bool Type::isObjCLifetimeType() const { 2204 const Type *type = this; 2205 while (const ArrayType *array = type->getAsArrayTypeUnsafe()) 2206 type = array->getElementType().getTypePtr(); 2207 return type->isObjCRetainableType(); 2208} 2209 2210/// \brief Determine whether the given type T is a "bridgable" Objective-C type, 2211/// which is either an Objective-C object pointer type or an 2212bool Type::isObjCARCBridgableType() const { 2213 return isObjCObjectPointerType() || isBlockPointerType(); 2214} 2215 2216/// \brief Determine whether the given type T is a "bridgeable" C type. 2217bool Type::isCARCBridgableType() const { 2218 const PointerType *Pointer = getAs<PointerType>(); 2219 if (!Pointer) 2220 return false; 2221 2222 QualType Pointee = Pointer->getPointeeType(); 2223 return Pointee->isVoidType() || Pointee->isRecordType(); 2224} 2225 2226bool Type::hasSizedVLAType() const { 2227 if (!isVariablyModifiedType()) return false; 2228 2229 if (const PointerType *ptr = getAs<PointerType>()) 2230 return ptr->getPointeeType()->hasSizedVLAType(); 2231 if (const ReferenceType *ref = getAs<ReferenceType>()) 2232 return ref->getPointeeType()->hasSizedVLAType(); 2233 if (const ArrayType *arr = getAsArrayTypeUnsafe()) { 2234 if (isa<VariableArrayType>(arr) && 2235 cast<VariableArrayType>(arr)->getSizeExpr()) 2236 return true; 2237 2238 return arr->getElementType()->hasSizedVLAType(); 2239 } 2240 2241 return false; 2242} 2243 2244QualType::DestructionKind QualType::isDestructedTypeImpl(QualType type) { 2245 switch (type.getObjCLifetime()) { 2246 case Qualifiers::OCL_None: 2247 case Qualifiers::OCL_ExplicitNone: 2248 case Qualifiers::OCL_Autoreleasing: 2249 break; 2250 2251 case Qualifiers::OCL_Strong: 2252 return DK_objc_strong_lifetime; 2253 case Qualifiers::OCL_Weak: 2254 return DK_objc_weak_lifetime; 2255 } 2256 2257 /// Currently, the only destruction kind we recognize is C++ objects 2258 /// with non-trivial destructors. 2259 const CXXRecordDecl *record = 2260 type->getBaseElementTypeUnsafe()->getAsCXXRecordDecl(); 2261 if (record && record->hasDefinition() && !record->hasTrivialDestructor()) 2262 return DK_cxx_destructor; 2263 2264 return DK_none; 2265} 2266 2267bool QualType::hasTrivialAssignment(ASTContext &Context, bool Copying) const { 2268 switch (getObjCLifetime()) { 2269 case Qualifiers::OCL_None: 2270 break; 2271 2272 case Qualifiers::OCL_ExplicitNone: 2273 return true; 2274 2275 case Qualifiers::OCL_Autoreleasing: 2276 case Qualifiers::OCL_Strong: 2277 case Qualifiers::OCL_Weak: 2278 return !Context.getLangOptions().ObjCAutoRefCount; 2279 } 2280 2281 if (const CXXRecordDecl *Record 2282 = getTypePtr()->getBaseElementTypeUnsafe()->getAsCXXRecordDecl()) 2283 return Copying ? Record->hasTrivialCopyAssignment() : 2284 Record->hasTrivialMoveAssignment(); 2285 2286 return true; 2287} 2288