Type.h revision cfe6ae592450d8466b4d78b59ff4526266549a9a
1//===--- Type.h - C Language Family Type Representation ---------*- C++ -*-===// 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 defines the Type interface and subclasses. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_CLANG_AST_TYPE_H 15#define LLVM_CLANG_AST_TYPE_H 16 17#include "clang/Basic/Diagnostic.h" 18#include "clang/Basic/IdentifierTable.h" 19#include "clang/AST/NestedNameSpecifier.h" 20#include "clang/AST/TemplateName.h" 21#include "llvm/Support/Casting.h" 22#include "llvm/Support/type_traits.h" 23#include "llvm/ADT/APSInt.h" 24#include "llvm/ADT/FoldingSet.h" 25#include "llvm/ADT/PointerIntPair.h" 26#include "llvm/ADT/PointerUnion.h" 27 28using llvm::isa; 29using llvm::cast; 30using llvm::cast_or_null; 31using llvm::dyn_cast; 32using llvm::dyn_cast_or_null; 33namespace clang { class Type; } 34 35namespace llvm { 36 template <typename T> 37 class PointerLikeTypeTraits; 38 template<> 39 class PointerLikeTypeTraits< ::clang::Type*> { 40 public: 41 static inline void *getAsVoidPointer(::clang::Type *P) { return P; } 42 static inline ::clang::Type *getFromVoidPointer(void *P) { 43 return static_cast< ::clang::Type*>(P); 44 } 45 enum { NumLowBitsAvailable = 3 }; 46 }; 47} 48 49namespace clang { 50 class ASTContext; 51 class TypedefDecl; 52 class TemplateDecl; 53 class TemplateTypeParmDecl; 54 class NonTypeTemplateParmDecl; 55 class TemplateTemplateParmDecl; 56 class TagDecl; 57 class RecordDecl; 58 class CXXRecordDecl; 59 class EnumDecl; 60 class FieldDecl; 61 class ObjCInterfaceDecl; 62 class ObjCProtocolDecl; 63 class ObjCMethodDecl; 64 class Expr; 65 class Stmt; 66 class SourceLocation; 67 class StmtIteratorBase; 68 class TemplateArgument; 69 class QualifiedNameType; 70 struct PrintingPolicy; 71 72 // Provide forward declarations for all of the *Type classes 73#define TYPE(Class, Base) class Class##Type; 74#include "clang/AST/TypeNodes.def" 75 76/// QualType - For efficiency, we don't store CVR-qualified types as nodes on 77/// their own: instead each reference to a type stores the qualifiers. This 78/// greatly reduces the number of nodes we need to allocate for types (for 79/// example we only need one for 'int', 'const int', 'volatile int', 80/// 'const volatile int', etc). 81/// 82/// As an added efficiency bonus, instead of making this a pair, we just store 83/// the three bits we care about in the low bits of the pointer. To handle the 84/// packing/unpacking, we make QualType be a simple wrapper class that acts like 85/// a smart pointer. 86class QualType { 87 llvm::PointerIntPair<Type*, 3> Value; 88public: 89 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 90 Const = 0x1, 91 Restrict = 0x2, 92 Volatile = 0x4, 93 CVRFlags = Const|Restrict|Volatile 94 }; 95 96 enum GCAttrTypes { 97 GCNone = 0, 98 Weak, 99 Strong 100 }; 101 102 // 24 bits should be enough for anyone. 103 static const unsigned MaxAddressSpace = 0xffffffu; 104 105 QualType() {} 106 107 QualType(const Type *Ptr, unsigned Quals) 108 : Value(const_cast<Type*>(Ptr), Quals) {} 109 110 unsigned getCVRQualifiers() const { return Value.getInt(); } 111 void setCVRQualifiers(unsigned Quals) { Value.setInt(Quals); } 112 Type *getTypePtr() const { return Value.getPointer(); } 113 114 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 115 static QualType getFromOpaquePtr(void *Ptr) { 116 QualType T; 117 T.Value.setFromOpaqueValue(Ptr); 118 return T; 119 } 120 121 Type &operator*() const { 122 return *getTypePtr(); 123 } 124 125 Type *operator->() const { 126 return getTypePtr(); 127 } 128 129 /// isNull - Return true if this QualType doesn't point to a type yet. 130 bool isNull() const { 131 return getTypePtr() == 0; 132 } 133 134 bool isConstQualified() const { 135 return (getCVRQualifiers() & Const) ? true : false; 136 } 137 bool isVolatileQualified() const { 138 return (getCVRQualifiers() & Volatile) ? true : false; 139 } 140 bool isRestrictQualified() const { 141 return (getCVRQualifiers() & Restrict) ? true : false; 142 } 143 144 bool isConstant(ASTContext& Ctx) const; 145 146 /// addConst/addVolatile/addRestrict - add the specified type qual to this 147 /// QualType. 148 void addConst() { Value.setInt(Value.getInt() | Const); } 149 void addVolatile() { Value.setInt(Value.getInt() | Volatile); } 150 void addRestrict() { Value.setInt(Value.getInt() | Restrict); } 151 152 void removeConst() { Value.setInt(Value.getInt() & ~Const); } 153 void removeVolatile() { Value.setInt(Value.getInt() & ~Volatile); } 154 void removeRestrict() { Value.setInt(Value.getInt() & ~Restrict); } 155 156 QualType getQualifiedType(unsigned TQs) const { 157 return QualType(getTypePtr(), TQs); 158 } 159 QualType getWithAdditionalQualifiers(unsigned TQs) const { 160 return QualType(getTypePtr(), TQs|getCVRQualifiers()); 161 } 162 163 QualType withConst() const { return getWithAdditionalQualifiers(Const); } 164 QualType withVolatile() const { return getWithAdditionalQualifiers(Volatile);} 165 QualType withRestrict() const { return getWithAdditionalQualifiers(Restrict);} 166 167 QualType getUnqualifiedType() const; 168 bool isMoreQualifiedThan(QualType Other) const; 169 bool isAtLeastAsQualifiedAs(QualType Other) const; 170 QualType getNonReferenceType() const; 171 172 /// getDesugaredType - Return the specified type with any "sugar" removed from 173 /// the type. This takes off typedefs, typeof's etc. If the outer level of 174 /// the type is already concrete, it returns it unmodified. This is similar 175 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 176 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 177 /// concrete. 178 QualType getDesugaredType(bool ForDisplay = false) const; 179 180 /// operator==/!= - Indicate whether the specified types and qualifiers are 181 /// identical. 182 friend bool operator==(const QualType &LHS, const QualType &RHS) { 183 return LHS.Value == RHS.Value; 184 } 185 friend bool operator!=(const QualType &LHS, const QualType &RHS) { 186 return LHS.Value != RHS.Value; 187 } 188 std::string getAsString() const; 189 190 std::string getAsString(const PrintingPolicy &Policy) const { 191 std::string S; 192 getAsStringInternal(S, Policy); 193 return S; 194 } 195 void getAsStringInternal(std::string &Str, 196 const PrintingPolicy &Policy) const; 197 198 void dump(const char *s) const; 199 void dump() const; 200 201 void Profile(llvm::FoldingSetNodeID &ID) const { 202 ID.AddPointer(getAsOpaquePtr()); 203 } 204 205public: 206 207 /// getAddressSpace - Return the address space of this type. 208 inline unsigned getAddressSpace() const; 209 210 /// GCAttrTypesAttr - Returns gc attribute of this type. 211 inline QualType::GCAttrTypes getObjCGCAttr() const; 212 213 /// isObjCGCWeak true when Type is objc's weak. 214 bool isObjCGCWeak() const { 215 return getObjCGCAttr() == Weak; 216 } 217 218 /// isObjCGCStrong true when Type is objc's strong. 219 bool isObjCGCStrong() const { 220 return getObjCGCAttr() == Strong; 221 } 222 223 /// getNoReturnAttr - Returns true if the type has the noreturn attribute, 224 /// false otherwise. 225 bool getNoReturnAttr() const; 226}; 227 228} // end clang. 229 230namespace llvm { 231/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 232/// to a specific Type class. 233template<> struct simplify_type<const ::clang::QualType> { 234 typedef ::clang::Type* SimpleType; 235 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 236 return Val.getTypePtr(); 237 } 238}; 239template<> struct simplify_type< ::clang::QualType> 240 : public simplify_type<const ::clang::QualType> {}; 241 242// Teach SmallPtrSet that QualType is "basically a pointer". 243template<> 244class PointerLikeTypeTraits<clang::QualType> { 245public: 246 static inline void *getAsVoidPointer(clang::QualType P) { 247 return P.getAsOpaquePtr(); 248 } 249 static inline clang::QualType getFromVoidPointer(void *P) { 250 return clang::QualType::getFromOpaquePtr(P); 251 } 252 // CVR qualifiers go in low bits. 253 enum { NumLowBitsAvailable = 0 }; 254}; 255 256} // end namespace llvm 257 258namespace clang { 259 260/// Type - This is the base class of the type hierarchy. A central concept 261/// with types is that each type always has a canonical type. A canonical type 262/// is the type with any typedef names stripped out of it or the types it 263/// references. For example, consider: 264/// 265/// typedef int foo; 266/// typedef foo* bar; 267/// 'int *' 'foo *' 'bar' 268/// 269/// There will be a Type object created for 'int'. Since int is canonical, its 270/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 271/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 272/// there is a PointerType that represents 'int*', which, like 'int', is 273/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 274/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 275/// is also 'int*'. 276/// 277/// Non-canonical types are useful for emitting diagnostics, without losing 278/// information about typedefs being used. Canonical types are useful for type 279/// comparisons (they allow by-pointer equality tests) and useful for reasoning 280/// about whether something has a particular form (e.g. is a function type), 281/// because they implicitly, recursively, strip all typedefs out of a type. 282/// 283/// Types, once created, are immutable. 284/// 285class Type { 286public: 287 enum TypeClass { 288#define TYPE(Class, Base) Class, 289#define ABSTRACT_TYPE(Class, Base) 290#include "clang/AST/TypeNodes.def" 291 TagFirst = Record, TagLast = Enum 292 }; 293 294private: 295 QualType CanonicalType; 296 297 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 298 bool Dependent : 1; 299 300 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 301 /// Note that this should stay at the end of the ivars for Type so that 302 /// subclasses can pack their bitfields into the same word. 303 unsigned TC : 6; 304 305 Type(const Type&); // DO NOT IMPLEMENT. 306 void operator=(const Type&); // DO NOT IMPLEMENT. 307protected: 308 // silence VC++ warning C4355: 'this' : used in base member initializer list 309 Type *this_() { return this; } 310 Type(TypeClass tc, QualType Canonical, bool dependent) 311 : CanonicalType(Canonical.isNull() ? QualType(this_(), 0) : Canonical), 312 Dependent(dependent), TC(tc) {} 313 virtual ~Type() {} 314 virtual void Destroy(ASTContext& C); 315 friend class ASTContext; 316 317public: 318 TypeClass getTypeClass() const { return static_cast<TypeClass>(TC); } 319 320 bool isCanonical() const { return CanonicalType.getTypePtr() == this; } 321 322 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 323 /// object types, function types, and incomplete types. 324 325 /// \brief Determines whether the type describes an object in memory. 326 /// 327 /// Note that this definition of object type corresponds to the C++ 328 /// definition of object type, which includes incomplete types, as 329 /// opposed to the C definition (which does not include incomplete 330 /// types). 331 bool isObjectType() const; 332 333 /// isIncompleteType - Return true if this is an incomplete type. 334 /// A type that can describe objects, but which lacks information needed to 335 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 336 /// routine will need to determine if the size is actually required. 337 bool isIncompleteType() const; 338 339 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 340 /// type, in other words, not a function type. 341 bool isIncompleteOrObjectType() const { 342 return !isFunctionType(); 343 } 344 345 /// isPODType - Return true if this is a plain-old-data type (C++ 3.9p10). 346 bool isPODType() const; 347 348 /// isVariablyModifiedType (C99 6.7.5.2p2) - Return true for variable array 349 /// types that have a non-constant expression. This does not include "[]". 350 bool isVariablyModifiedType() const; 351 352 /// Helper methods to distinguish type categories. All type predicates 353 /// operate on the canonical type, ignoring typedefs and qualifiers. 354 355 /// isSpecificBuiltinType - Test for a particular builtin type. 356 bool isSpecificBuiltinType(unsigned K) const; 357 358 /// isIntegerType() does *not* include complex integers (a GCC extension). 359 /// isComplexIntegerType() can be used to test for complex integers. 360 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 361 bool isEnumeralType() const; 362 bool isBooleanType() const; 363 bool isCharType() const; 364 bool isWideCharType() const; 365 bool isIntegralType() const; 366 367 /// Floating point categories. 368 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 369 /// isComplexType() does *not* include complex integers (a GCC extension). 370 /// isComplexIntegerType() can be used to test for complex integers. 371 bool isComplexType() const; // C99 6.2.5p11 (complex) 372 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 373 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 374 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 375 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 376 bool isVoidType() const; // C99 6.2.5p19 377 bool isDerivedType() const; // C99 6.2.5p20 378 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 379 bool isAggregateType() const; 380 381 // Type Predicates: Check to see if this type is structurally the specified 382 // type, ignoring typedefs and qualifiers. 383 bool isFunctionType() const; 384 bool isFunctionNoProtoType() const { return getAsFunctionNoProtoType() != 0; } 385 bool isFunctionProtoType() const { return getAsFunctionProtoType() != 0; } 386 bool isPointerType() const; 387 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 388 bool isBlockPointerType() const; 389 bool isVoidPointerType() const; 390 bool isReferenceType() const; 391 bool isLValueReferenceType() const; 392 bool isRValueReferenceType() const; 393 bool isFunctionPointerType() const; 394 bool isMemberPointerType() const; 395 bool isMemberFunctionPointerType() const; 396 bool isArrayType() const; 397 bool isConstantArrayType() const; 398 bool isIncompleteArrayType() const; 399 bool isVariableArrayType() const; 400 bool isDependentSizedArrayType() const; 401 bool isRecordType() const; 402 bool isClassType() const; 403 bool isStructureType() const; 404 bool isUnionType() const; 405 bool isComplexIntegerType() const; // GCC _Complex integer type. 406 bool isVectorType() const; // GCC vector type. 407 bool isExtVectorType() const; // Extended vector type. 408 bool isObjCObjectPointerType() const; // Pointer to *any* ObjC object. 409 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 410 // for the common case. 411 bool isObjCInterfaceType() const; // NSString or NSString<foo> 412 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 413 bool isObjCQualifiedIdType() const; // id<foo> 414 bool isObjCQualifiedClassType() const; // Class<foo> 415 bool isObjCIdType() const; // id 416 bool isObjCClassType() const; // Class 417 bool isObjCBuiltinType() const; // 'id' or 'Class' 418 bool isTemplateTypeParmType() const; // C++ template type parameter 419 bool isNullPtrType() const; // C++0x nullptr_t 420 421 /// isDependentType - Whether this type is a dependent type, meaning 422 /// that its definition somehow depends on a template parameter 423 /// (C++ [temp.dep.type]). 424 bool isDependentType() const { return Dependent; } 425 bool isOverloadableType() const; 426 427 /// hasPointerRepresentation - Whether this type is represented 428 /// natively as a pointer; this includes pointers, references, block 429 /// pointers, and Objective-C interface, qualified id, and qualified 430 /// interface types, as well as nullptr_t. 431 bool hasPointerRepresentation() const; 432 433 /// hasObjCPointerRepresentation - Whether this type can represent 434 /// an objective pointer type for the purpose of GC'ability 435 bool hasObjCPointerRepresentation() const; 436 437 // Type Checking Functions: Check to see if this type is structurally the 438 // specified type, ignoring typedefs and qualifiers, and return a pointer to 439 // the best type we can. 440 const BuiltinType *getAsBuiltinType() const; 441 const FunctionType *getAsFunctionType() const; 442 const FunctionNoProtoType *getAsFunctionNoProtoType() const; 443 const FunctionProtoType *getAsFunctionProtoType() const; 444 const RecordType *getAsStructureType() const; 445 /// NOTE: getAs*ArrayType are methods on ASTContext. 446 const TypedefType *getAsTypedefType() const; 447 const RecordType *getAsUnionType() const; 448 const EnumType *getAsEnumType() const; 449 const VectorType *getAsVectorType() const; // GCC vector type. 450 const ComplexType *getAsComplexType() const; 451 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 452 const ExtVectorType *getAsExtVectorType() const; // Extended vector type. 453 const ObjCObjectPointerType *getAsObjCObjectPointerType() const; 454 // The following is a convenience method that returns an ObjCObjectPointerType 455 // for object declared using an interface. 456 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 457 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 458 const ObjCInterfaceType *getAsObjCInterfaceType() const; 459 const ObjCInterfaceType *getAsObjCQualifiedInterfaceType() const; 460 const TemplateTypeParmType *getAsTemplateTypeParmType() const; 461 const CXXRecordDecl *getCXXRecordDeclForPointerType() const; 462 463 // Member-template getAs<specific type>'. This scheme will eventually 464 // replace the specific getAsXXXX methods above. 465 template <typename T> const T *getAs() const; 466 467 const TemplateSpecializationType * 468 getAsTemplateSpecializationType() const; 469 470 /// getAsPointerToObjCInterfaceType - If this is a pointer to an ObjC 471 /// interface, return the interface type, otherwise return null. 472 const ObjCInterfaceType *getAsPointerToObjCInterfaceType() const; 473 474 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 475 /// element type of the array, potentially with type qualifiers missing. 476 /// This method should never be used when type qualifiers are meaningful. 477 const Type *getArrayElementTypeNoTypeQual() const; 478 479 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 480 /// pointer, this returns the respective pointee. 481 QualType getPointeeType() const; 482 483 /// getDesugaredType - Return the specified type with any "sugar" removed from 484 /// the type. This takes off typedefs, typeof's etc. If the outer level of 485 /// the type is already concrete, it returns it unmodified. This is similar 486 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 487 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 488 /// concrete. 489 QualType getDesugaredType(bool ForDisplay = false) const; 490 491 /// More type predicates useful for type checking/promotion 492 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 493 494 /// isSignedIntegerType - Return true if this is an integer type that is 495 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 496 /// an enum decl which has a signed representation, or a vector of signed 497 /// integer element type. 498 bool isSignedIntegerType() const; 499 500 /// isUnsignedIntegerType - Return true if this is an integer type that is 501 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 502 /// decl which has an unsigned representation, or a vector of unsigned integer 503 /// element type. 504 bool isUnsignedIntegerType() const; 505 506 /// isConstantSizeType - Return true if this is not a variable sized type, 507 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 508 /// incomplete types. 509 bool isConstantSizeType() const; 510 511 /// isSpecifierType - Returns true if this type can be represented by some 512 /// set of type specifiers. 513 bool isSpecifierType() const; 514 515 QualType getCanonicalTypeInternal() const { return CanonicalType; } 516 void dump() const; 517 virtual void getAsStringInternal(std::string &InnerString, 518 const PrintingPolicy &Policy) const = 0; 519 static bool classof(const Type *) { return true; } 520}; 521 522/// ExtQualType - TR18037 (C embedded extensions) 6.2.5p26 523/// This supports all kinds of type attributes; including, 524/// address space qualified types, objective-c's __weak and 525/// __strong attributes. 526/// 527class ExtQualType : public Type, public llvm::FoldingSetNode { 528 /// BaseType - This is the underlying type that this qualifies. All CVR 529 /// qualifiers are stored on the QualType that references this type, so we 530 /// can't have any here. 531 Type *BaseType; 532 533 /// Address Space ID - The address space ID this type is qualified with. 534 unsigned AddressSpace; 535 /// GC __weak/__strong attributes 536 QualType::GCAttrTypes GCAttrType; 537 538 ExtQualType(Type *Base, QualType CanonicalPtr, unsigned AddrSpace, 539 QualType::GCAttrTypes gcAttr) : 540 Type(ExtQual, CanonicalPtr, Base->isDependentType()), BaseType(Base), 541 AddressSpace(AddrSpace), GCAttrType(gcAttr) { 542 assert(!isa<ExtQualType>(BaseType) && 543 "Cannot have ExtQualType of ExtQualType"); 544 } 545 friend class ASTContext; // ASTContext creates these. 546public: 547 Type *getBaseType() const { return BaseType; } 548 QualType::GCAttrTypes getObjCGCAttr() const { return GCAttrType; } 549 unsigned getAddressSpace() const { return AddressSpace; } 550 551 virtual void getAsStringInternal(std::string &InnerString, 552 const PrintingPolicy &Policy) const; 553 554 void Profile(llvm::FoldingSetNodeID &ID) { 555 Profile(ID, getBaseType(), AddressSpace, GCAttrType); 556 } 557 static void Profile(llvm::FoldingSetNodeID &ID, Type *Base, 558 unsigned AddrSpace, QualType::GCAttrTypes gcAttr) { 559 ID.AddPointer(Base); 560 ID.AddInteger(AddrSpace); 561 ID.AddInteger(gcAttr); 562 } 563 564 static bool classof(const Type *T) { return T->getTypeClass() == ExtQual; } 565 static bool classof(const ExtQualType *) { return true; } 566}; 567 568 569/// QualifierSet - This class is used to collect qualifiers. 570/// Clang supports five independent qualifiers: 571/// * C99: const, volatile, and restrict 572/// * Embedded C (TR18037): address spaces 573/// * Objective C: the GC attributes (none, weak, or strong) 574class QualifierSet { 575public: 576 QualifierSet() : Mask(0) {} 577 578 void removeConst() { removeCVR(QualType::Const); } 579 void removeVolatile() { removeCVR(QualType::Volatile); } 580 void removeRestrict() { removeCVR(QualType::Restrict); } 581 void removeCVR(unsigned mask) { Mask &= ~mask; } 582 void removeAddressSpace() { setAddressSpace(0); } 583 void removeObjCGCAttrType() { setGCAttrType(QualType::GCNone); } 584 585 void addConst() { addCVR(QualType::Const); } 586 void addVolatile() { addCVR(QualType::Volatile); } 587 void addRestrict() { addCVR(QualType::Restrict); } 588 void addCVR(unsigned mask) { Mask |= mask; } 589 void addAddressSpace(unsigned space) { 590 assert(space); 591 setAddressSpace(space); 592 } 593 void addObjCGCAttrType(QualType::GCAttrTypes type) { 594 assert(type); 595 setGCAttrType(type); 596 } 597 598 bool hasConst() const { return Mask & QualType::Const; } 599 bool hasVolatile() const { return Mask & QualType::Volatile; } 600 bool hasRestrict() const { return Mask & QualType::Restrict; } 601 unsigned getCVRMask() const { return Mask & CVRMask; } 602 603 bool hasObjCGCAttrType() const { return Mask & GCAttrMask; } 604 QualType::GCAttrTypes getObjCGCAttrType() const { 605 return QualType::GCAttrTypes((Mask & GCAttrMask) >> GCAttrShift); 606 } 607 608 bool hasAddressSpace() const { return Mask & AddressSpaceMask; } 609 unsigned getAddressSpace() const { return Mask >> AddressSpaceShift; } 610 611 /// empty() - Return true if there are no qualifiers collected 612 /// in this set. 613 bool empty() { 614 return (Mask == 0); 615 } 616 617 /// Collect any qualifiers on the given type and return an 618 /// unqualified type. 619 const Type *strip(QualType QT) { 620 Mask |= QT.getCVRQualifiers(); 621 return strip(QT.getTypePtr()); 622 } 623 624 /// Collect any qualifiers on the given type and return an 625 /// unqualified type. 626 const Type *strip(const Type* T); 627 628 /// Apply the collected qualifiers to the given type. 629 QualType apply(QualType QT, ASTContext& C); 630 631 /// Apply the collected qualifiers to the given type. 632 QualType apply(const Type* T, ASTContext& C) { 633 return apply(QualType(T, 0), C); 634 } 635 636 bool operator==(QualifierSet& Other) { return Mask == Other.Mask; } 637 638private: 639 void setAddressSpace(unsigned space) { 640 assert(space <= MaxAddressSpace); 641 Mask = (Mask & ~AddressSpaceMask) 642 | (((uint32_t) space) << AddressSpaceShift); 643 } 644 645 void setGCAttrType(QualType::GCAttrTypes type) { 646 Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift); 647 } 648 649 // bits: |0 1 2|3 .. 4|5 .. 31| 650 // |C R V|GCAttr|AddrSpace| 651 uint32_t Mask; 652 653 static const uint32_t CVRMask = 0x07; 654 static const uint32_t GCAttrMask = 0x18; 655 static const uint32_t GCAttrShift = 3; 656 static const uint32_t AddressSpaceMask = ~(CVRMask | GCAttrMask); 657 static const uint32_t AddressSpaceShift = 5; 658 static const unsigned MaxAddressSpace = QualType::MaxAddressSpace; 659}; 660 661 662/// BuiltinType - This class is used for builtin types like 'int'. Builtin 663/// types are always canonical and have a literal name field. 664class BuiltinType : public Type { 665public: 666 enum Kind { 667 Void, 668 669 Bool, // This is bool and/or _Bool. 670 Char_U, // This is 'char' for targets where char is unsigned. 671 UChar, // This is explicitly qualified unsigned char. 672 Char16, // This is 'char16_t' for C++. 673 Char32, // This is 'char32_t' for C++. 674 UShort, 675 UInt, 676 ULong, 677 ULongLong, 678 UInt128, // __uint128_t 679 680 Char_S, // This is 'char' for targets where char is signed. 681 SChar, // This is explicitly qualified signed char. 682 WChar, // This is 'wchar_t' for C++. 683 Short, 684 Int, 685 Long, 686 LongLong, 687 Int128, // __int128_t 688 689 Float, Double, LongDouble, 690 691 NullPtr, // This is the type of C++0x 'nullptr'. 692 693 Overload, // This represents the type of an overloaded function declaration. 694 Dependent, // This represents the type of a type-dependent expression. 695 696 UndeducedAuto, // In C++0x, this represents the type of an auto variable 697 // that has not been deduced yet. 698 ObjCId, // This represents the ObjC 'id' type. 699 ObjCClass // This represents the ObjC 'Class' type. 700 }; 701private: 702 Kind TypeKind; 703public: 704 BuiltinType(Kind K) 705 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent)), 706 TypeKind(K) {} 707 708 Kind getKind() const { return TypeKind; } 709 const char *getName(const LangOptions &LO) const; 710 711 virtual void getAsStringInternal(std::string &InnerString, 712 const PrintingPolicy &Policy) const; 713 714 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 715 static bool classof(const BuiltinType *) { return true; } 716}; 717 718/// FixedWidthIntType - Used for arbitrary width types that we either don't 719/// want to or can't map to named integer types. These always have a lower 720/// integer rank than builtin types of the same width. 721class FixedWidthIntType : public Type { 722private: 723 unsigned Width; 724 bool Signed; 725public: 726 FixedWidthIntType(unsigned W, bool S) : Type(FixedWidthInt, QualType(), false), 727 Width(W), Signed(S) {} 728 729 unsigned getWidth() const { return Width; } 730 bool isSigned() const { return Signed; } 731 const char *getName() const; 732 733 virtual void getAsStringInternal(std::string &InnerString, 734 const PrintingPolicy &Policy) const; 735 736 static bool classof(const Type *T) { return T->getTypeClass() == FixedWidthInt; } 737 static bool classof(const FixedWidthIntType *) { return true; } 738}; 739 740/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 741/// types (_Complex float etc) as well as the GCC integer complex extensions. 742/// 743class ComplexType : public Type, public llvm::FoldingSetNode { 744 QualType ElementType; 745 ComplexType(QualType Element, QualType CanonicalPtr) : 746 Type(Complex, CanonicalPtr, Element->isDependentType()), 747 ElementType(Element) { 748 } 749 friend class ASTContext; // ASTContext creates these. 750public: 751 QualType getElementType() const { return ElementType; } 752 753 virtual void getAsStringInternal(std::string &InnerString, 754 const PrintingPolicy &Policy) const; 755 756 void Profile(llvm::FoldingSetNodeID &ID) { 757 Profile(ID, getElementType()); 758 } 759 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 760 ID.AddPointer(Element.getAsOpaquePtr()); 761 } 762 763 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 764 static bool classof(const ComplexType *) { return true; } 765}; 766 767/// PointerType - C99 6.7.5.1 - Pointer Declarators. 768/// 769class PointerType : public Type, public llvm::FoldingSetNode { 770 QualType PointeeType; 771 772 PointerType(QualType Pointee, QualType CanonicalPtr) : 773 Type(Pointer, CanonicalPtr, Pointee->isDependentType()), PointeeType(Pointee) { 774 } 775 friend class ASTContext; // ASTContext creates these. 776public: 777 778 virtual void getAsStringInternal(std::string &InnerString, 779 const PrintingPolicy &Policy) const; 780 781 QualType getPointeeType() const { return PointeeType; } 782 783 void Profile(llvm::FoldingSetNodeID &ID) { 784 Profile(ID, getPointeeType()); 785 } 786 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 787 ID.AddPointer(Pointee.getAsOpaquePtr()); 788 } 789 790 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 791 static bool classof(const PointerType *) { return true; } 792}; 793 794/// BlockPointerType - pointer to a block type. 795/// This type is to represent types syntactically represented as 796/// "void (^)(int)", etc. Pointee is required to always be a function type. 797/// 798class BlockPointerType : public Type, public llvm::FoldingSetNode { 799 QualType PointeeType; // Block is some kind of pointer type 800 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 801 Type(BlockPointer, CanonicalCls, Pointee->isDependentType()), 802 PointeeType(Pointee) { 803 } 804 friend class ASTContext; // ASTContext creates these. 805public: 806 807 // Get the pointee type. Pointee is required to always be a function type. 808 QualType getPointeeType() const { return PointeeType; } 809 810 virtual void getAsStringInternal(std::string &InnerString, 811 const PrintingPolicy &Policy) const; 812 813 void Profile(llvm::FoldingSetNodeID &ID) { 814 Profile(ID, getPointeeType()); 815 } 816 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 817 ID.AddPointer(Pointee.getAsOpaquePtr()); 818 } 819 820 static bool classof(const Type *T) { 821 return T->getTypeClass() == BlockPointer; 822 } 823 static bool classof(const BlockPointerType *) { return true; } 824}; 825 826/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 827/// 828class ReferenceType : public Type, public llvm::FoldingSetNode { 829 QualType PointeeType; 830 831protected: 832 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef) : 833 Type(tc, CanonicalRef, Referencee->isDependentType()), 834 PointeeType(Referencee) { 835 } 836public: 837 QualType getPointeeType() const { return PointeeType; } 838 839 void Profile(llvm::FoldingSetNodeID &ID) { 840 Profile(ID, getPointeeType()); 841 } 842 static void Profile(llvm::FoldingSetNodeID &ID, QualType Referencee) { 843 ID.AddPointer(Referencee.getAsOpaquePtr()); 844 } 845 846 static bool classof(const Type *T) { 847 return T->getTypeClass() == LValueReference || 848 T->getTypeClass() == RValueReference; 849 } 850 static bool classof(const ReferenceType *) { return true; } 851}; 852 853/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 854/// 855class LValueReferenceType : public ReferenceType { 856 LValueReferenceType(QualType Referencee, QualType CanonicalRef) : 857 ReferenceType(LValueReference, Referencee, CanonicalRef) { 858 } 859 friend class ASTContext; // ASTContext creates these 860public: 861 virtual void getAsStringInternal(std::string &InnerString, 862 const PrintingPolicy &Policy) const; 863 864 static bool classof(const Type *T) { 865 return T->getTypeClass() == LValueReference; 866 } 867 static bool classof(const LValueReferenceType *) { return true; } 868}; 869 870/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 871/// 872class RValueReferenceType : public ReferenceType { 873 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 874 ReferenceType(RValueReference, Referencee, CanonicalRef) { 875 } 876 friend class ASTContext; // ASTContext creates these 877public: 878 virtual void getAsStringInternal(std::string &InnerString, 879 const PrintingPolicy &Policy) const; 880 881 static bool classof(const Type *T) { 882 return T->getTypeClass() == RValueReference; 883 } 884 static bool classof(const RValueReferenceType *) { return true; } 885}; 886 887/// MemberPointerType - C++ 8.3.3 - Pointers to members 888/// 889class MemberPointerType : public Type, public llvm::FoldingSetNode { 890 QualType PointeeType; 891 /// The class of which the pointee is a member. Must ultimately be a 892 /// RecordType, but could be a typedef or a template parameter too. 893 const Type *Class; 894 895 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 896 Type(MemberPointer, CanonicalPtr, 897 Cls->isDependentType() || Pointee->isDependentType()), 898 PointeeType(Pointee), Class(Cls) { 899 } 900 friend class ASTContext; // ASTContext creates these. 901public: 902 903 QualType getPointeeType() const { return PointeeType; } 904 905 const Type *getClass() const { return Class; } 906 907 virtual void getAsStringInternal(std::string &InnerString, 908 const PrintingPolicy &Policy) const; 909 910 void Profile(llvm::FoldingSetNodeID &ID) { 911 Profile(ID, getPointeeType(), getClass()); 912 } 913 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 914 const Type *Class) { 915 ID.AddPointer(Pointee.getAsOpaquePtr()); 916 ID.AddPointer(Class); 917 } 918 919 static bool classof(const Type *T) { 920 return T->getTypeClass() == MemberPointer; 921 } 922 static bool classof(const MemberPointerType *) { return true; } 923}; 924 925/// ArrayType - C99 6.7.5.2 - Array Declarators. 926/// 927class ArrayType : public Type, public llvm::FoldingSetNode { 928public: 929 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 930 /// an array with a static size (e.g. int X[static 4]), or an array 931 /// with a star size (e.g. int X[*]). 932 /// 'static' is only allowed on function parameters. 933 enum ArraySizeModifier { 934 Normal, Static, Star 935 }; 936private: 937 /// ElementType - The element type of the array. 938 QualType ElementType; 939 940 // NOTE: VC++ treats enums as signed, avoid using the ArraySizeModifier enum 941 /// NOTE: These fields are packed into the bitfields space in the Type class. 942 unsigned SizeModifier : 2; 943 944 /// IndexTypeQuals - Capture qualifiers in declarations like: 945 /// 'int X[static restrict 4]'. For function parameters only. 946 unsigned IndexTypeQuals : 3; 947 948protected: 949 // C++ [temp.dep.type]p1: 950 // A type is dependent if it is... 951 // - an array type constructed from any dependent type or whose 952 // size is specified by a constant expression that is 953 // value-dependent, 954 ArrayType(TypeClass tc, QualType et, QualType can, 955 ArraySizeModifier sm, unsigned tq) 956 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray), 957 ElementType(et), SizeModifier(sm), IndexTypeQuals(tq) {} 958 959 friend class ASTContext; // ASTContext creates these. 960public: 961 QualType getElementType() const { return ElementType; } 962 ArraySizeModifier getSizeModifier() const { 963 return ArraySizeModifier(SizeModifier); 964 } 965 unsigned getIndexTypeQualifier() const { return IndexTypeQuals; } 966 967 static bool classof(const Type *T) { 968 return T->getTypeClass() == ConstantArray || 969 T->getTypeClass() == ConstantArrayWithExpr || 970 T->getTypeClass() == ConstantArrayWithoutExpr || 971 T->getTypeClass() == VariableArray || 972 T->getTypeClass() == IncompleteArray || 973 T->getTypeClass() == DependentSizedArray; 974 } 975 static bool classof(const ArrayType *) { return true; } 976}; 977 978/// ConstantArrayType - This class represents the canonical version of 979/// C arrays with a specified constant size. For example, the canonical 980/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 981/// type is 'int' and the size is 404. 982class ConstantArrayType : public ArrayType { 983 llvm::APInt Size; // Allows us to unique the type. 984 985 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 986 ArraySizeModifier sm, unsigned tq) 987 : ArrayType(ConstantArray, et, can, sm, tq), 988 Size(size) {} 989protected: 990 ConstantArrayType(TypeClass tc, QualType et, QualType can, 991 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 992 : ArrayType(tc, et, can, sm, tq), Size(size) {} 993 friend class ASTContext; // ASTContext creates these. 994public: 995 const llvm::APInt &getSize() const { return Size; } 996 virtual void getAsStringInternal(std::string &InnerString, 997 const PrintingPolicy &Policy) const; 998 999 void Profile(llvm::FoldingSetNodeID &ID) { 1000 Profile(ID, getElementType(), getSize(), 1001 getSizeModifier(), getIndexTypeQualifier()); 1002 } 1003 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1004 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 1005 unsigned TypeQuals) { 1006 ID.AddPointer(ET.getAsOpaquePtr()); 1007 ID.AddInteger(ArraySize.getZExtValue()); 1008 ID.AddInteger(SizeMod); 1009 ID.AddInteger(TypeQuals); 1010 } 1011 static bool classof(const Type *T) { 1012 return T->getTypeClass() == ConstantArray || 1013 T->getTypeClass() == ConstantArrayWithExpr || 1014 T->getTypeClass() == ConstantArrayWithoutExpr; 1015 } 1016 static bool classof(const ConstantArrayType *) { return true; } 1017}; 1018 1019/// ConstantArrayWithExprType - This class represents C arrays with a 1020/// constant size specified by means of an integer constant expression. 1021/// For example 'int A[sizeof(int)]' has ConstantArrayWithExprType where 1022/// the element type is 'int' and the size expression is 'sizeof(int)'. 1023/// These types are non-canonical. 1024class ConstantArrayWithExprType : public ConstantArrayType { 1025 /// SizeExpr - The ICE occurring in the concrete syntax. 1026 Expr *SizeExpr; 1027 /// Brackets - The left and right array brackets. 1028 SourceRange Brackets; 1029 1030 ConstantArrayWithExprType(QualType et, QualType can, 1031 const llvm::APInt &size, Expr *e, 1032 ArraySizeModifier sm, unsigned tq, 1033 SourceRange brackets) 1034 : ConstantArrayType(ConstantArrayWithExpr, et, can, size, sm, tq), 1035 SizeExpr(e), Brackets(brackets) {} 1036 friend class ASTContext; // ASTContext creates these. 1037 virtual void Destroy(ASTContext& C); 1038 1039public: 1040 Expr *getSizeExpr() const { return SizeExpr; } 1041 SourceRange getBracketsRange() const { return Brackets; } 1042 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1043 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1044 1045 virtual void getAsStringInternal(std::string &InnerString, 1046 const PrintingPolicy &Policy) const; 1047 1048 static bool classof(const Type *T) { 1049 return T->getTypeClass() == ConstantArrayWithExpr; 1050 } 1051 static bool classof(const ConstantArrayWithExprType *) { return true; } 1052 1053 void Profile(llvm::FoldingSetNodeID &ID) { 1054 assert(0 && "Cannot unique ConstantArrayWithExprTypes."); 1055 } 1056}; 1057 1058/// ConstantArrayWithoutExprType - This class represents C arrays with a 1059/// constant size that was not specified by an integer constant expression, 1060/// but inferred by static semantics. 1061/// For example 'int A[] = { 0, 1, 2 }' has ConstantArrayWithoutExprType. 1062/// These types are non-canonical: the corresponding canonical type, 1063/// having the size specified in an APInt object, is a ConstantArrayType. 1064class ConstantArrayWithoutExprType : public ConstantArrayType { 1065 1066 ConstantArrayWithoutExprType(QualType et, QualType can, 1067 const llvm::APInt &size, 1068 ArraySizeModifier sm, unsigned tq) 1069 : ConstantArrayType(ConstantArrayWithoutExpr, et, can, size, sm, tq) {} 1070 friend class ASTContext; // ASTContext creates these. 1071 1072public: 1073 virtual void getAsStringInternal(std::string &InnerString, 1074 const PrintingPolicy &Policy) const; 1075 1076 static bool classof(const Type *T) { 1077 return T->getTypeClass() == ConstantArrayWithoutExpr; 1078 } 1079 static bool classof(const ConstantArrayWithoutExprType *) { return true; } 1080 1081 void Profile(llvm::FoldingSetNodeID &ID) { 1082 assert(0 && "Cannot unique ConstantArrayWithoutExprTypes."); 1083 } 1084}; 1085 1086/// IncompleteArrayType - This class represents C arrays with an unspecified 1087/// size. For example 'int A[]' has an IncompleteArrayType where the element 1088/// type is 'int' and the size is unspecified. 1089class IncompleteArrayType : public ArrayType { 1090 1091 IncompleteArrayType(QualType et, QualType can, 1092 ArraySizeModifier sm, unsigned tq) 1093 : ArrayType(IncompleteArray, et, can, sm, tq) {} 1094 friend class ASTContext; // ASTContext creates these. 1095public: 1096 virtual void getAsStringInternal(std::string &InnerString, 1097 const PrintingPolicy &Policy) const; 1098 1099 static bool classof(const Type *T) { 1100 return T->getTypeClass() == IncompleteArray; 1101 } 1102 static bool classof(const IncompleteArrayType *) { return true; } 1103 1104 friend class StmtIteratorBase; 1105 1106 void Profile(llvm::FoldingSetNodeID &ID) { 1107 Profile(ID, getElementType(), getSizeModifier(), getIndexTypeQualifier()); 1108 } 1109 1110 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1111 ArraySizeModifier SizeMod, unsigned TypeQuals) { 1112 ID.AddPointer(ET.getAsOpaquePtr()); 1113 ID.AddInteger(SizeMod); 1114 ID.AddInteger(TypeQuals); 1115 } 1116}; 1117 1118/// VariableArrayType - This class represents C arrays with a specified size 1119/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 1120/// Since the size expression is an arbitrary expression, we store it as such. 1121/// 1122/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 1123/// should not be: two lexically equivalent variable array types could mean 1124/// different things, for example, these variables do not have the same type 1125/// dynamically: 1126/// 1127/// void foo(int x) { 1128/// int Y[x]; 1129/// ++x; 1130/// int Z[x]; 1131/// } 1132/// 1133class VariableArrayType : public ArrayType { 1134 /// SizeExpr - An assignment expression. VLA's are only permitted within 1135 /// a function block. 1136 Stmt *SizeExpr; 1137 /// Brackets - The left and right array brackets. 1138 SourceRange Brackets; 1139 1140 VariableArrayType(QualType et, QualType can, Expr *e, 1141 ArraySizeModifier sm, unsigned tq, 1142 SourceRange brackets) 1143 : ArrayType(VariableArray, et, can, sm, tq), 1144 SizeExpr((Stmt*) e), Brackets(brackets) {} 1145 friend class ASTContext; // ASTContext creates these. 1146 virtual void Destroy(ASTContext& C); 1147 1148public: 1149 Expr *getSizeExpr() const { 1150 // We use C-style casts instead of cast<> here because we do not wish 1151 // to have a dependency of Type.h on Stmt.h/Expr.h. 1152 return (Expr*) SizeExpr; 1153 } 1154 SourceRange getBracketsRange() const { return Brackets; } 1155 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1156 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1157 1158 virtual void getAsStringInternal(std::string &InnerString, 1159 const PrintingPolicy &Policy) const; 1160 1161 static bool classof(const Type *T) { 1162 return T->getTypeClass() == VariableArray; 1163 } 1164 static bool classof(const VariableArrayType *) { return true; } 1165 1166 friend class StmtIteratorBase; 1167 1168 void Profile(llvm::FoldingSetNodeID &ID) { 1169 assert(0 && "Cannnot unique VariableArrayTypes."); 1170 } 1171}; 1172 1173/// DependentSizedArrayType - This type represents an array type in 1174/// C++ whose size is a value-dependent expression. For example: 1175/// @code 1176/// template<typename T, int Size> 1177/// class array { 1178/// T data[Size]; 1179/// }; 1180/// @endcode 1181/// For these types, we won't actually know what the array bound is 1182/// until template instantiation occurs, at which point this will 1183/// become either a ConstantArrayType or a VariableArrayType. 1184class DependentSizedArrayType : public ArrayType { 1185 ASTContext &Context; 1186 1187 /// SizeExpr - An assignment expression that will instantiate to the 1188 /// size of the array. 1189 Stmt *SizeExpr; 1190 /// Brackets - The left and right array brackets. 1191 SourceRange Brackets; 1192 1193 DependentSizedArrayType(ASTContext &Context, QualType et, QualType can, 1194 Expr *e, ArraySizeModifier sm, unsigned tq, 1195 SourceRange brackets) 1196 : ArrayType(DependentSizedArray, et, can, sm, tq), 1197 Context(Context), SizeExpr((Stmt*) e), Brackets(brackets) {} 1198 friend class ASTContext; // ASTContext creates these. 1199 virtual void Destroy(ASTContext& C); 1200 1201public: 1202 Expr *getSizeExpr() const { 1203 // We use C-style casts instead of cast<> here because we do not wish 1204 // to have a dependency of Type.h on Stmt.h/Expr.h. 1205 return (Expr*) SizeExpr; 1206 } 1207 SourceRange getBracketsRange() const { return Brackets; } 1208 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1209 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1210 1211 virtual void getAsStringInternal(std::string &InnerString, 1212 const PrintingPolicy &Policy) const; 1213 1214 static bool classof(const Type *T) { 1215 return T->getTypeClass() == DependentSizedArray; 1216 } 1217 static bool classof(const DependentSizedArrayType *) { return true; } 1218 1219 friend class StmtIteratorBase; 1220 1221 1222 void Profile(llvm::FoldingSetNodeID &ID) { 1223 Profile(ID, Context, getElementType(), 1224 getSizeModifier(), getIndexTypeQualifier(), getSizeExpr()); 1225 } 1226 1227 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1228 QualType ET, ArraySizeModifier SizeMod, 1229 unsigned TypeQuals, Expr *E); 1230}; 1231 1232/// DependentSizedExtVectorType - This type represent an extended vector type 1233/// where either the type or size is dependent. For example: 1234/// @code 1235/// template<typename T, int Size> 1236/// class vector { 1237/// typedef T __attribute__((ext_vector_type(Size))) type; 1238/// } 1239/// @endcode 1240class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 1241 ASTContext &Context; 1242 Expr *SizeExpr; 1243 /// ElementType - The element type of the array. 1244 QualType ElementType; 1245 SourceLocation loc; 1246 1247 DependentSizedExtVectorType(ASTContext &Context, QualType ElementType, 1248 QualType can, Expr *SizeExpr, SourceLocation loc) 1249 : Type (DependentSizedExtVector, can, true), 1250 Context(Context), SizeExpr(SizeExpr), ElementType(ElementType), 1251 loc(loc) {} 1252 friend class ASTContext; 1253 virtual void Destroy(ASTContext& C); 1254 1255public: 1256 Expr *getSizeExpr() const { return SizeExpr; } 1257 QualType getElementType() const { return ElementType; } 1258 SourceLocation getAttributeLoc() const { return loc; } 1259 1260 virtual void getAsStringInternal(std::string &InnerString, 1261 const PrintingPolicy &Policy) const; 1262 1263 static bool classof(const Type *T) { 1264 return T->getTypeClass() == DependentSizedExtVector; 1265 } 1266 static bool classof(const DependentSizedExtVectorType *) { return true; } 1267 1268 void Profile(llvm::FoldingSetNodeID &ID) { 1269 Profile(ID, Context, getElementType(), getSizeExpr()); 1270 } 1271 1272 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1273 QualType ElementType, Expr *SizeExpr); 1274}; 1275 1276 1277/// VectorType - GCC generic vector type. This type is created using 1278/// __attribute__((vector_size(n)), where "n" specifies the vector size in 1279/// bytes. Since the constructor takes the number of vector elements, the 1280/// client is responsible for converting the size into the number of elements. 1281class VectorType : public Type, public llvm::FoldingSetNode { 1282protected: 1283 /// ElementType - The element type of the vector. 1284 QualType ElementType; 1285 1286 /// NumElements - The number of elements in the vector. 1287 unsigned NumElements; 1288 1289 VectorType(QualType vecType, unsigned nElements, QualType canonType) : 1290 Type(Vector, canonType, vecType->isDependentType()), 1291 ElementType(vecType), NumElements(nElements) {} 1292 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 1293 QualType canonType) 1294 : Type(tc, canonType, vecType->isDependentType()), ElementType(vecType), 1295 NumElements(nElements) {} 1296 friend class ASTContext; // ASTContext creates these. 1297public: 1298 1299 QualType getElementType() const { return ElementType; } 1300 unsigned getNumElements() const { return NumElements; } 1301 1302 virtual void getAsStringInternal(std::string &InnerString, 1303 const PrintingPolicy &Policy) const; 1304 1305 void Profile(llvm::FoldingSetNodeID &ID) { 1306 Profile(ID, getElementType(), getNumElements(), getTypeClass()); 1307 } 1308 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 1309 unsigned NumElements, TypeClass TypeClass) { 1310 ID.AddPointer(ElementType.getAsOpaquePtr()); 1311 ID.AddInteger(NumElements); 1312 ID.AddInteger(TypeClass); 1313 } 1314 static bool classof(const Type *T) { 1315 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 1316 } 1317 static bool classof(const VectorType *) { return true; } 1318}; 1319 1320/// ExtVectorType - Extended vector type. This type is created using 1321/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 1322/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 1323/// class enables syntactic extensions, like Vector Components for accessing 1324/// points, colors, and textures (modeled after OpenGL Shading Language). 1325class ExtVectorType : public VectorType { 1326 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 1327 VectorType(ExtVector, vecType, nElements, canonType) {} 1328 friend class ASTContext; // ASTContext creates these. 1329public: 1330 static int getPointAccessorIdx(char c) { 1331 switch (c) { 1332 default: return -1; 1333 case 'x': return 0; 1334 case 'y': return 1; 1335 case 'z': return 2; 1336 case 'w': return 3; 1337 } 1338 } 1339 static int getNumericAccessorIdx(char c) { 1340 switch (c) { 1341 default: return -1; 1342 case '0': return 0; 1343 case '1': return 1; 1344 case '2': return 2; 1345 case '3': return 3; 1346 case '4': return 4; 1347 case '5': return 5; 1348 case '6': return 6; 1349 case '7': return 7; 1350 case '8': return 8; 1351 case '9': return 9; 1352 case 'A': 1353 case 'a': return 10; 1354 case 'B': 1355 case 'b': return 11; 1356 case 'C': 1357 case 'c': return 12; 1358 case 'D': 1359 case 'd': return 13; 1360 case 'E': 1361 case 'e': return 14; 1362 case 'F': 1363 case 'f': return 15; 1364 } 1365 } 1366 1367 static int getAccessorIdx(char c) { 1368 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 1369 return getNumericAccessorIdx(c); 1370 } 1371 1372 bool isAccessorWithinNumElements(char c) const { 1373 if (int idx = getAccessorIdx(c)+1) 1374 return unsigned(idx-1) < NumElements; 1375 return false; 1376 } 1377 virtual void getAsStringInternal(std::string &InnerString, 1378 const PrintingPolicy &Policy) const; 1379 1380 static bool classof(const Type *T) { 1381 return T->getTypeClass() == ExtVector; 1382 } 1383 static bool classof(const ExtVectorType *) { return true; } 1384}; 1385 1386/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 1387/// class of FunctionNoProtoType and FunctionProtoType. 1388/// 1389class FunctionType : public Type { 1390 /// SubClassData - This field is owned by the subclass, put here to pack 1391 /// tightly with the ivars in Type. 1392 bool SubClassData : 1; 1393 1394 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1395 /// other bitfields. 1396 /// The qualifiers are part of FunctionProtoType because... 1397 /// 1398 /// C++ 8.3.5p4: The return type, the parameter type list and the 1399 /// cv-qualifier-seq, [...], are part of the function type. 1400 /// 1401 unsigned TypeQuals : 3; 1402 1403 /// NoReturn - Indicates if the function type is attribute noreturn. 1404 unsigned NoReturn : 1; 1405 1406 // The type returned by the function. 1407 QualType ResultType; 1408protected: 1409 FunctionType(TypeClass tc, QualType res, bool SubclassInfo, 1410 unsigned typeQuals, QualType Canonical, bool Dependent, 1411 bool noReturn = false) 1412 : Type(tc, Canonical, Dependent), 1413 SubClassData(SubclassInfo), TypeQuals(typeQuals), NoReturn(noReturn), 1414 ResultType(res) {} 1415 bool getSubClassData() const { return SubClassData; } 1416 unsigned getTypeQuals() const { return TypeQuals; } 1417public: 1418 1419 QualType getResultType() const { return ResultType; } 1420 bool getNoReturnAttr() const { return NoReturn; } 1421 1422 1423 static bool classof(const Type *T) { 1424 return T->getTypeClass() == FunctionNoProto || 1425 T->getTypeClass() == FunctionProto; 1426 } 1427 static bool classof(const FunctionType *) { return true; } 1428}; 1429 1430/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 1431/// no information available about its arguments. 1432class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 1433 FunctionNoProtoType(QualType Result, QualType Canonical, 1434 bool NoReturn = false) 1435 : FunctionType(FunctionNoProto, Result, false, 0, Canonical, 1436 /*Dependent=*/false, NoReturn) {} 1437 friend class ASTContext; // ASTContext creates these. 1438public: 1439 // No additional state past what FunctionType provides. 1440 1441 virtual void getAsStringInternal(std::string &InnerString, 1442 const PrintingPolicy &Policy) const; 1443 1444 void Profile(llvm::FoldingSetNodeID &ID) { 1445 Profile(ID, getResultType(), getNoReturnAttr()); 1446 } 1447 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 1448 bool NoReturn) { 1449 ID.AddInteger(NoReturn); 1450 ID.AddPointer(ResultType.getAsOpaquePtr()); 1451 } 1452 1453 static bool classof(const Type *T) { 1454 return T->getTypeClass() == FunctionNoProto; 1455 } 1456 static bool classof(const FunctionNoProtoType *) { return true; } 1457}; 1458 1459/// FunctionProtoType - Represents a prototype with argument type info, e.g. 1460/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 1461/// arguments, not as having a single void argument. Such a type can have an 1462/// exception specification, but this specification is not part of the canonical 1463/// type. 1464class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 1465 /// hasAnyDependentType - Determine whether there are any dependent 1466 /// types within the arguments passed in. 1467 static bool hasAnyDependentType(const QualType *ArgArray, unsigned numArgs) { 1468 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 1469 if (ArgArray[Idx]->isDependentType()) 1470 return true; 1471 1472 return false; 1473 } 1474 1475 FunctionProtoType(QualType Result, const QualType *ArgArray, unsigned numArgs, 1476 bool isVariadic, unsigned typeQuals, bool hasExs, 1477 bool hasAnyExs, const QualType *ExArray, 1478 unsigned numExs, QualType Canonical, bool NoReturn) 1479 : FunctionType(FunctionProto, Result, isVariadic, typeQuals, Canonical, 1480 (Result->isDependentType() || 1481 hasAnyDependentType(ArgArray, numArgs)), NoReturn), 1482 NumArgs(numArgs), NumExceptions(numExs), HasExceptionSpec(hasExs), 1483 AnyExceptionSpec(hasAnyExs) { 1484 // Fill in the trailing argument array. 1485 QualType *ArgInfo = reinterpret_cast<QualType*>(this+1); 1486 for (unsigned i = 0; i != numArgs; ++i) 1487 ArgInfo[i] = ArgArray[i]; 1488 // Fill in the exception array. 1489 QualType *Ex = ArgInfo + numArgs; 1490 for (unsigned i = 0; i != numExs; ++i) 1491 Ex[i] = ExArray[i]; 1492 } 1493 1494 /// NumArgs - The number of arguments this function has, not counting '...'. 1495 unsigned NumArgs : 20; 1496 1497 /// NumExceptions - The number of types in the exception spec, if any. 1498 unsigned NumExceptions : 10; 1499 1500 /// HasExceptionSpec - Whether this function has an exception spec at all. 1501 bool HasExceptionSpec : 1; 1502 1503 /// AnyExceptionSpec - Whether this function has a throw(...) spec. 1504 bool AnyExceptionSpec : 1; 1505 1506 /// ArgInfo - There is an variable size array after the class in memory that 1507 /// holds the argument types. 1508 1509 /// Exceptions - There is another variable size array after ArgInfo that 1510 /// holds the exception types. 1511 1512 friend class ASTContext; // ASTContext creates these. 1513 1514public: 1515 unsigned getNumArgs() const { return NumArgs; } 1516 QualType getArgType(unsigned i) const { 1517 assert(i < NumArgs && "Invalid argument number!"); 1518 return arg_type_begin()[i]; 1519 } 1520 1521 bool hasExceptionSpec() const { return HasExceptionSpec; } 1522 bool hasAnyExceptionSpec() const { return AnyExceptionSpec; } 1523 unsigned getNumExceptions() const { return NumExceptions; } 1524 QualType getExceptionType(unsigned i) const { 1525 assert(i < NumExceptions && "Invalid exception number!"); 1526 return exception_begin()[i]; 1527 } 1528 bool hasEmptyExceptionSpec() const { 1529 return hasExceptionSpec() && !hasAnyExceptionSpec() && 1530 getNumExceptions() == 0; 1531 } 1532 1533 bool isVariadic() const { return getSubClassData(); } 1534 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 1535 1536 typedef const QualType *arg_type_iterator; 1537 arg_type_iterator arg_type_begin() const { 1538 return reinterpret_cast<const QualType *>(this+1); 1539 } 1540 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 1541 1542 typedef const QualType *exception_iterator; 1543 exception_iterator exception_begin() const { 1544 // exceptions begin where arguments end 1545 return arg_type_end(); 1546 } 1547 exception_iterator exception_end() const { 1548 return exception_begin() + NumExceptions; 1549 } 1550 1551 virtual void getAsStringInternal(std::string &InnerString, 1552 const PrintingPolicy &Policy) const; 1553 1554 static bool classof(const Type *T) { 1555 return T->getTypeClass() == FunctionProto; 1556 } 1557 static bool classof(const FunctionProtoType *) { return true; } 1558 1559 void Profile(llvm::FoldingSetNodeID &ID); 1560 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 1561 arg_type_iterator ArgTys, unsigned NumArgs, 1562 bool isVariadic, unsigned TypeQuals, 1563 bool hasExceptionSpec, bool anyExceptionSpec, 1564 unsigned NumExceptions, exception_iterator Exs, 1565 bool NoReturn); 1566}; 1567 1568 1569class TypedefType : public Type { 1570 TypedefDecl *Decl; 1571protected: 1572 TypedefType(TypeClass tc, TypedefDecl *D, QualType can) 1573 : Type(tc, can, can->isDependentType()), Decl(D) { 1574 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1575 } 1576 friend class ASTContext; // ASTContext creates these. 1577public: 1578 1579 TypedefDecl *getDecl() const { return Decl; } 1580 1581 /// LookThroughTypedefs - Return the ultimate type this typedef corresponds to 1582 /// potentially looking through *all* consecutive typedefs. This returns the 1583 /// sum of the type qualifiers, so if you have: 1584 /// typedef const int A; 1585 /// typedef volatile A B; 1586 /// looking through the typedefs for B will give you "const volatile A". 1587 QualType LookThroughTypedefs() const; 1588 1589 virtual void getAsStringInternal(std::string &InnerString, 1590 const PrintingPolicy &Policy) const; 1591 1592 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 1593 static bool classof(const TypedefType *) { return true; } 1594}; 1595 1596/// TypeOfExprType (GCC extension). 1597class TypeOfExprType : public Type { 1598 Expr *TOExpr; 1599 1600protected: 1601 TypeOfExprType(Expr *E, QualType can = QualType()); 1602 friend class ASTContext; // ASTContext creates these. 1603public: 1604 Expr *getUnderlyingExpr() const { return TOExpr; } 1605 1606 virtual void getAsStringInternal(std::string &InnerString, 1607 const PrintingPolicy &Policy) const; 1608 1609 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 1610 static bool classof(const TypeOfExprType *) { return true; } 1611}; 1612 1613/// Subclass of TypeOfExprType that is used for canonical, dependent 1614/// typeof(expr) types. 1615class DependentTypeOfExprType 1616 : public TypeOfExprType, public llvm::FoldingSetNode { 1617 ASTContext &Context; 1618 1619public: 1620 DependentTypeOfExprType(ASTContext &Context, Expr *E) 1621 : TypeOfExprType(E), Context(Context) { } 1622 1623 void Profile(llvm::FoldingSetNodeID &ID) { 1624 Profile(ID, Context, getUnderlyingExpr()); 1625 } 1626 1627 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1628 Expr *E); 1629}; 1630 1631/// TypeOfType (GCC extension). 1632class TypeOfType : public Type { 1633 QualType TOType; 1634 TypeOfType(QualType T, QualType can) 1635 : Type(TypeOf, can, T->isDependentType()), TOType(T) { 1636 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1637 } 1638 friend class ASTContext; // ASTContext creates these. 1639public: 1640 QualType getUnderlyingType() const { return TOType; } 1641 1642 virtual void getAsStringInternal(std::string &InnerString, 1643 const PrintingPolicy &Policy) const; 1644 1645 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 1646 static bool classof(const TypeOfType *) { return true; } 1647}; 1648 1649/// DecltypeType (C++0x) 1650class DecltypeType : public Type { 1651 Expr *E; 1652 1653 // FIXME: We could get rid of UnderlyingType if we wanted to: We would have to 1654 // Move getDesugaredType to ASTContext so that it can call getDecltypeForExpr 1655 // from it. 1656 QualType UnderlyingType; 1657 1658protected: 1659 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 1660 friend class ASTContext; // ASTContext creates these. 1661public: 1662 Expr *getUnderlyingExpr() const { return E; } 1663 QualType getUnderlyingType() const { return UnderlyingType; } 1664 1665 virtual void getAsStringInternal(std::string &InnerString, 1666 const PrintingPolicy &Policy) const; 1667 1668 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 1669 static bool classof(const DecltypeType *) { return true; } 1670}; 1671 1672/// Subclass of DecltypeType that is used for canonical, dependent 1673/// C++0x decltype types. 1674class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 1675 ASTContext &Context; 1676 1677public: 1678 DependentDecltypeType(ASTContext &Context, Expr *E); 1679 1680 void Profile(llvm::FoldingSetNodeID &ID) { 1681 Profile(ID, Context, getUnderlyingExpr()); 1682 } 1683 1684 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1685 Expr *E); 1686}; 1687 1688class TagType : public Type { 1689 /// Stores the TagDecl associated with this type. The decl will 1690 /// point to the TagDecl that actually defines the entity (or is a 1691 /// definition in progress), if there is such a definition. The 1692 /// single-bit value will be non-zero when this tag is in the 1693 /// process of being defined. 1694 mutable llvm::PointerIntPair<TagDecl *, 1> decl; 1695 friend class ASTContext; 1696 friend class TagDecl; 1697 1698protected: 1699 TagType(TypeClass TC, TagDecl *D, QualType can); 1700 1701public: 1702 TagDecl *getDecl() const { return decl.getPointer(); } 1703 1704 /// @brief Determines whether this type is in the process of being 1705 /// defined. 1706 bool isBeingDefined() const { return decl.getInt(); } 1707 void setBeingDefined(bool Def) { decl.setInt(Def? 1 : 0); } 1708 1709 virtual void getAsStringInternal(std::string &InnerString, 1710 const PrintingPolicy &Policy) const; 1711 1712 static bool classof(const Type *T) { 1713 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 1714 } 1715 static bool classof(const TagType *) { return true; } 1716 static bool classof(const RecordType *) { return true; } 1717 static bool classof(const EnumType *) { return true; } 1718}; 1719 1720/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 1721/// to detect TagType objects of structs/unions/classes. 1722class RecordType : public TagType { 1723protected: 1724 explicit RecordType(RecordDecl *D) 1725 : TagType(Record, reinterpret_cast<TagDecl*>(D), QualType()) { } 1726 explicit RecordType(TypeClass TC, RecordDecl *D) 1727 : TagType(TC, reinterpret_cast<TagDecl*>(D), QualType()) { } 1728 friend class ASTContext; // ASTContext creates these. 1729public: 1730 1731 RecordDecl *getDecl() const { 1732 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 1733 } 1734 1735 // FIXME: This predicate is a helper to QualType/Type. It needs to 1736 // recursively check all fields for const-ness. If any field is declared 1737 // const, it needs to return false. 1738 bool hasConstFields() const { return false; } 1739 1740 // FIXME: RecordType needs to check when it is created that all fields are in 1741 // the same address space, and return that. 1742 unsigned getAddressSpace() const { return 0; } 1743 1744 static bool classof(const TagType *T); 1745 static bool classof(const Type *T) { 1746 return isa<TagType>(T) && classof(cast<TagType>(T)); 1747 } 1748 static bool classof(const RecordType *) { return true; } 1749}; 1750 1751/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 1752/// to detect TagType objects of enums. 1753class EnumType : public TagType { 1754 explicit EnumType(EnumDecl *D) 1755 : TagType(Enum, reinterpret_cast<TagDecl*>(D), QualType()) { } 1756 friend class ASTContext; // ASTContext creates these. 1757public: 1758 1759 EnumDecl *getDecl() const { 1760 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 1761 } 1762 1763 static bool classof(const TagType *T); 1764 static bool classof(const Type *T) { 1765 return isa<TagType>(T) && classof(cast<TagType>(T)); 1766 } 1767 static bool classof(const EnumType *) { return true; } 1768}; 1769 1770class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 1771 unsigned Depth : 15; 1772 unsigned Index : 16; 1773 unsigned ParameterPack : 1; 1774 IdentifierInfo *Name; 1775 1776 TemplateTypeParmType(unsigned D, unsigned I, bool PP, IdentifierInfo *N, 1777 QualType Canon) 1778 : Type(TemplateTypeParm, Canon, /*Dependent=*/true), 1779 Depth(D), Index(I), ParameterPack(PP), Name(N) { } 1780 1781 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 1782 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true), 1783 Depth(D), Index(I), ParameterPack(PP), Name(0) { } 1784 1785 friend class ASTContext; // ASTContext creates these 1786 1787public: 1788 unsigned getDepth() const { return Depth; } 1789 unsigned getIndex() const { return Index; } 1790 bool isParameterPack() const { return ParameterPack; } 1791 IdentifierInfo *getName() const { return Name; } 1792 1793 virtual void getAsStringInternal(std::string &InnerString, 1794 const PrintingPolicy &Policy) const; 1795 1796 void Profile(llvm::FoldingSetNodeID &ID) { 1797 Profile(ID, Depth, Index, ParameterPack, Name); 1798 } 1799 1800 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 1801 unsigned Index, bool ParameterPack, 1802 IdentifierInfo *Name) { 1803 ID.AddInteger(Depth); 1804 ID.AddInteger(Index); 1805 ID.AddBoolean(ParameterPack); 1806 ID.AddPointer(Name); 1807 } 1808 1809 static bool classof(const Type *T) { 1810 return T->getTypeClass() == TemplateTypeParm; 1811 } 1812 static bool classof(const TemplateTypeParmType *T) { return true; } 1813}; 1814 1815/// \brief Represents the type of a template specialization as written 1816/// in the source code. 1817/// 1818/// Template specialization types represent the syntactic form of a 1819/// template-id that refers to a type, e.g., @c vector<int>. Some 1820/// template specialization types are syntactic sugar, whose canonical 1821/// type will point to some other type node that represents the 1822/// instantiation or class template specialization. For example, a 1823/// class template specialization type of @c vector<int> will refer to 1824/// a tag type for the instantiation 1825/// @c std::vector<int, std::allocator<int>>. 1826/// 1827/// Other template specialization types, for which the template name 1828/// is dependent, may be canonical types. These types are always 1829/// dependent. 1830class TemplateSpecializationType 1831 : public Type, public llvm::FoldingSetNode { 1832 1833 // FIXME: Currently needed for profiling expressions; can we avoid this? 1834 ASTContext &Context; 1835 1836 /// \brief The name of the template being specialized. 1837 TemplateName Template; 1838 1839 /// \brief - The number of template arguments named in this class 1840 /// template specialization. 1841 unsigned NumArgs; 1842 1843 TemplateSpecializationType(ASTContext &Context, 1844 TemplateName T, 1845 const TemplateArgument *Args, 1846 unsigned NumArgs, QualType Canon); 1847 1848 virtual void Destroy(ASTContext& C); 1849 1850 friend class ASTContext; // ASTContext creates these 1851 1852public: 1853 /// \brief Determine whether any of the given template arguments are 1854 /// dependent. 1855 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 1856 unsigned NumArgs); 1857 1858 /// \brief Print a template argument list, including the '<' and '>' 1859 /// enclosing the template arguments. 1860 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 1861 unsigned NumArgs, 1862 const PrintingPolicy &Policy); 1863 1864 typedef const TemplateArgument * iterator; 1865 1866 iterator begin() const { return getArgs(); } 1867 iterator end() const; 1868 1869 /// \brief Retrieve the name of the template that we are specializing. 1870 TemplateName getTemplateName() const { return Template; } 1871 1872 /// \brief Retrieve the template arguments. 1873 const TemplateArgument *getArgs() const { 1874 return reinterpret_cast<const TemplateArgument *>(this + 1); 1875 } 1876 1877 /// \brief Retrieve the number of template arguments. 1878 unsigned getNumArgs() const { return NumArgs; } 1879 1880 /// \brief Retrieve a specific template argument as a type. 1881 /// \precondition @c isArgType(Arg) 1882 const TemplateArgument &getArg(unsigned Idx) const; 1883 1884 virtual void getAsStringInternal(std::string &InnerString, 1885 const PrintingPolicy &Policy) const; 1886 1887 void Profile(llvm::FoldingSetNodeID &ID) { 1888 Profile(ID, Template, getArgs(), NumArgs, Context); 1889 } 1890 1891 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 1892 const TemplateArgument *Args, unsigned NumArgs, 1893 ASTContext &Context); 1894 1895 static bool classof(const Type *T) { 1896 return T->getTypeClass() == TemplateSpecialization; 1897 } 1898 static bool classof(const TemplateSpecializationType *T) { return true; } 1899}; 1900 1901/// \brief Represents a type that was referred to via a qualified 1902/// name, e.g., N::M::type. 1903/// 1904/// This type is used to keep track of a type name as written in the 1905/// source code, including any nested-name-specifiers. The type itself 1906/// is always "sugar", used to express what was written in the source 1907/// code but containing no additional semantic information. 1908class QualifiedNameType : public Type, public llvm::FoldingSetNode { 1909 /// \brief The nested name specifier containing the qualifier. 1910 NestedNameSpecifier *NNS; 1911 1912 /// \brief The type that this qualified name refers to. 1913 QualType NamedType; 1914 1915 QualifiedNameType(NestedNameSpecifier *NNS, QualType NamedType, 1916 QualType CanonType) 1917 : Type(QualifiedName, CanonType, NamedType->isDependentType()), 1918 NNS(NNS), NamedType(NamedType) { } 1919 1920 friend class ASTContext; // ASTContext creates these 1921 1922public: 1923 /// \brief Retrieve the qualification on this type. 1924 NestedNameSpecifier *getQualifier() const { return NNS; } 1925 1926 /// \brief Retrieve the type named by the qualified-id. 1927 QualType getNamedType() const { return NamedType; } 1928 1929 virtual void getAsStringInternal(std::string &InnerString, 1930 const PrintingPolicy &Policy) const; 1931 1932 void Profile(llvm::FoldingSetNodeID &ID) { 1933 Profile(ID, NNS, NamedType); 1934 } 1935 1936 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 1937 QualType NamedType) { 1938 ID.AddPointer(NNS); 1939 NamedType.Profile(ID); 1940 } 1941 1942 static bool classof(const Type *T) { 1943 return T->getTypeClass() == QualifiedName; 1944 } 1945 static bool classof(const QualifiedNameType *T) { return true; } 1946}; 1947 1948/// \brief Represents a 'typename' specifier that names a type within 1949/// a dependent type, e.g., "typename T::type". 1950/// 1951/// TypenameType has a very similar structure to QualifiedNameType, 1952/// which also involves a nested-name-specifier following by a type, 1953/// and (FIXME!) both can even be prefixed by the 'typename' 1954/// keyword. However, the two types serve very different roles: 1955/// QualifiedNameType is a non-semantic type that serves only as sugar 1956/// to show how a particular type was written in the source 1957/// code. TypenameType, on the other hand, only occurs when the 1958/// nested-name-specifier is dependent, such that we cannot resolve 1959/// the actual type until after instantiation. 1960class TypenameType : public Type, public llvm::FoldingSetNode { 1961 /// \brief The nested name specifier containing the qualifier. 1962 NestedNameSpecifier *NNS; 1963 1964 typedef llvm::PointerUnion<const IdentifierInfo *, 1965 const TemplateSpecializationType *> NameType; 1966 1967 /// \brief The type that this typename specifier refers to. 1968 NameType Name; 1969 1970 TypenameType(NestedNameSpecifier *NNS, const IdentifierInfo *Name, 1971 QualType CanonType) 1972 : Type(Typename, CanonType, true), NNS(NNS), Name(Name) { 1973 assert(NNS->isDependent() && 1974 "TypenameType requires a dependent nested-name-specifier"); 1975 } 1976 1977 TypenameType(NestedNameSpecifier *NNS, const TemplateSpecializationType *Ty, 1978 QualType CanonType) 1979 : Type(Typename, CanonType, true), NNS(NNS), Name(Ty) { 1980 assert(NNS->isDependent() && 1981 "TypenameType requires a dependent nested-name-specifier"); 1982 } 1983 1984 friend class ASTContext; // ASTContext creates these 1985 1986public: 1987 /// \brief Retrieve the qualification on this type. 1988 NestedNameSpecifier *getQualifier() const { return NNS; } 1989 1990 /// \brief Retrieve the type named by the typename specifier as an 1991 /// identifier. 1992 /// 1993 /// This routine will return a non-NULL identifier pointer when the 1994 /// form of the original typename was terminated by an identifier, 1995 /// e.g., "typename T::type". 1996 const IdentifierInfo *getIdentifier() const { 1997 return Name.dyn_cast<const IdentifierInfo *>(); 1998 } 1999 2000 /// \brief Retrieve the type named by the typename specifier as a 2001 /// type specialization. 2002 const TemplateSpecializationType *getTemplateId() const { 2003 return Name.dyn_cast<const TemplateSpecializationType *>(); 2004 } 2005 2006 virtual void getAsStringInternal(std::string &InnerString, 2007 const PrintingPolicy &Policy) const; 2008 2009 void Profile(llvm::FoldingSetNodeID &ID) { 2010 Profile(ID, NNS, Name); 2011 } 2012 2013 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 2014 NameType Name) { 2015 ID.AddPointer(NNS); 2016 ID.AddPointer(Name.getOpaqueValue()); 2017 } 2018 2019 static bool classof(const Type *T) { 2020 return T->getTypeClass() == Typename; 2021 } 2022 static bool classof(const TypenameType *T) { return true; } 2023}; 2024 2025/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 2026/// object oriented design. They basically correspond to C++ classes. There 2027/// are two kinds of interface types, normal interfaces like "NSString" and 2028/// qualified interfaces, which are qualified with a protocol list like 2029/// "NSString<NSCopyable, NSAmazing>". 2030class ObjCInterfaceType : public Type, public llvm::FoldingSetNode { 2031 ObjCInterfaceDecl *Decl; 2032 2033 // List of protocols for this protocol conforming object type 2034 // List is sorted on protocol name. No protocol is enterred more than once. 2035 llvm::SmallVector<ObjCProtocolDecl*, 4> Protocols; 2036 2037 ObjCInterfaceType(ObjCInterfaceDecl *D, 2038 ObjCProtocolDecl **Protos, unsigned NumP) : 2039 Type(ObjCInterface, QualType(), /*Dependent=*/false), 2040 Decl(D), Protocols(Protos, Protos+NumP) { } 2041 friend class ASTContext; // ASTContext creates these. 2042public: 2043 ObjCInterfaceDecl *getDecl() const { return Decl; } 2044 2045 /// getNumProtocols - Return the number of qualifying protocols in this 2046 /// interface type, or 0 if there are none. 2047 unsigned getNumProtocols() const { return Protocols.size(); } 2048 2049 /// qual_iterator and friends: this provides access to the (potentially empty) 2050 /// list of protocols qualifying this interface. 2051 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 2052 qual_iterator qual_begin() const { return Protocols.begin(); } 2053 qual_iterator qual_end() const { return Protocols.end(); } 2054 bool qual_empty() const { return Protocols.size() == 0; } 2055 2056 virtual void getAsStringInternal(std::string &InnerString, 2057 const PrintingPolicy &Policy) const; 2058 2059 void Profile(llvm::FoldingSetNodeID &ID); 2060 static void Profile(llvm::FoldingSetNodeID &ID, 2061 const ObjCInterfaceDecl *Decl, 2062 ObjCProtocolDecl **protocols, unsigned NumProtocols); 2063 2064 static bool classof(const Type *T) { 2065 return T->getTypeClass() == ObjCInterface; 2066 } 2067 static bool classof(const ObjCInterfaceType *) { return true; } 2068}; 2069 2070/// ObjCObjectPointerType - Used to represent 'id', 'Interface *', 'id <p>', 2071/// and 'Interface <p> *'. 2072/// 2073/// Duplicate protocols are removed and protocol list is canonicalized to be in 2074/// alphabetical order. 2075class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 2076 QualType PointeeType; // A builtin or interface type. 2077 2078 // List of protocols for this protocol conforming object type 2079 // List is sorted on protocol name. No protocol is entered more than once. 2080 llvm::SmallVector<ObjCProtocolDecl*, 8> Protocols; 2081 2082 ObjCObjectPointerType(QualType T, ObjCProtocolDecl **Protos, unsigned NumP) : 2083 Type(ObjCObjectPointer, QualType(), /*Dependent=*/false), 2084 PointeeType(T), Protocols(Protos, Protos+NumP) { } 2085 friend class ASTContext; // ASTContext creates these. 2086 2087public: 2088 // Get the pointee type. Pointee will either be: 2089 // - a built-in type (for 'id' and 'Class'). 2090 // - an interface type (for user-defined types). 2091 // - a TypedefType whose canonical type is an interface (as in 'T' below). 2092 // For example: typedef NSObject T; T *var; 2093 QualType getPointeeType() const { return PointeeType; } 2094 2095 const ObjCInterfaceType *getInterfaceType() const { 2096 return PointeeType->getAsObjCInterfaceType(); 2097 } 2098 /// getInterfaceDecl - returns an interface decl for user-defined types. 2099 ObjCInterfaceDecl *getInterfaceDecl() const { 2100 return getInterfaceType() ? getInterfaceType()->getDecl() : 0; 2101 } 2102 /// isObjCIdType - true for "id". 2103 bool isObjCIdType() const { 2104 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCId) && 2105 !Protocols.size(); 2106 } 2107 /// isObjCClassType - true for "Class". 2108 bool isObjCClassType() const { 2109 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCClass) && 2110 !Protocols.size(); 2111 } 2112 /// isObjCQualifiedIdType - true for "id <p>". 2113 bool isObjCQualifiedIdType() const { 2114 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCId) && 2115 Protocols.size(); 2116 } 2117 /// isObjCQualifiedClassType - true for "Class <p>". 2118 bool isObjCQualifiedClassType() const { 2119 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCClass) && 2120 Protocols.size(); 2121 } 2122 /// qual_iterator and friends: this provides access to the (potentially empty) 2123 /// list of protocols qualifying this interface. 2124 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 2125 2126 qual_iterator qual_begin() const { return Protocols.begin(); } 2127 qual_iterator qual_end() const { return Protocols.end(); } 2128 bool qual_empty() const { return Protocols.size() == 0; } 2129 2130 /// getNumProtocols - Return the number of qualifying protocols in this 2131 /// interface type, or 0 if there are none. 2132 unsigned getNumProtocols() const { return Protocols.size(); } 2133 2134 void Profile(llvm::FoldingSetNodeID &ID); 2135 static void Profile(llvm::FoldingSetNodeID &ID, QualType T, 2136 ObjCProtocolDecl **protocols, unsigned NumProtocols); 2137 virtual void getAsStringInternal(std::string &InnerString, 2138 const PrintingPolicy &Policy) const; 2139 static bool classof(const Type *T) { 2140 return T->getTypeClass() == ObjCObjectPointer; 2141 } 2142 static bool classof(const ObjCObjectPointerType *) { return true; } 2143}; 2144 2145// Inline function definitions. 2146 2147/// getUnqualifiedType - Return the type without any qualifiers. 2148inline QualType QualType::getUnqualifiedType() const { 2149 Type *TP = getTypePtr(); 2150 if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(TP)) 2151 TP = EXTQT->getBaseType(); 2152 return QualType(TP, 0); 2153} 2154 2155/// getAddressSpace - Return the address space of this type. 2156inline unsigned QualType::getAddressSpace() const { 2157 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2158 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 2159 return AT->getElementType().getAddressSpace(); 2160 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 2161 return RT->getAddressSpace(); 2162 if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(CT)) 2163 return EXTQT->getAddressSpace(); 2164 return 0; 2165} 2166 2167/// getObjCGCAttr - Return the gc attribute of this type. 2168inline QualType::GCAttrTypes QualType::getObjCGCAttr() const { 2169 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2170 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 2171 return AT->getElementType().getObjCGCAttr(); 2172 if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(CT)) 2173 return EXTQT->getObjCGCAttr(); 2174 if (const ObjCObjectPointerType *PT = CT->getAsObjCObjectPointerType()) 2175 return PT->getPointeeType().getObjCGCAttr(); 2176 return GCNone; 2177} 2178 2179 /// getNoReturnAttr - Returns true if the type has the noreturn attribute, 2180 /// false otherwise. 2181inline bool QualType::getNoReturnAttr() const { 2182 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2183 if (const PointerType *PT = getTypePtr()->getAs<PointerType>()) { 2184 if (const FunctionType *FT = PT->getPointeeType()->getAsFunctionType()) 2185 return FT->getNoReturnAttr(); 2186 } else if (const FunctionType *FT = getTypePtr()->getAsFunctionType()) 2187 return FT->getNoReturnAttr(); 2188 2189 return false; 2190} 2191 2192/// isMoreQualifiedThan - Determine whether this type is more 2193/// qualified than the Other type. For example, "const volatile int" 2194/// is more qualified than "const int", "volatile int", and 2195/// "int". However, it is not more qualified than "const volatile 2196/// int". 2197inline bool QualType::isMoreQualifiedThan(QualType Other) const { 2198 unsigned MyQuals = this->getCVRQualifiers(); 2199 unsigned OtherQuals = Other.getCVRQualifiers(); 2200 if (getAddressSpace() != Other.getAddressSpace()) 2201 return false; 2202 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 2203} 2204 2205/// isAtLeastAsQualifiedAs - Determine whether this type is at last 2206/// as qualified as the Other type. For example, "const volatile 2207/// int" is at least as qualified as "const int", "volatile int", 2208/// "int", and "const volatile int". 2209inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 2210 unsigned MyQuals = this->getCVRQualifiers(); 2211 unsigned OtherQuals = Other.getCVRQualifiers(); 2212 if (getAddressSpace() != Other.getAddressSpace()) 2213 return false; 2214 return (MyQuals | OtherQuals) == MyQuals; 2215} 2216 2217/// getNonReferenceType - If Type is a reference type (e.g., const 2218/// int&), returns the type that the reference refers to ("const 2219/// int"). Otherwise, returns the type itself. This routine is used 2220/// throughout Sema to implement C++ 5p6: 2221/// 2222/// If an expression initially has the type "reference to T" (8.3.2, 2223/// 8.5.3), the type is adjusted to "T" prior to any further 2224/// analysis, the expression designates the object or function 2225/// denoted by the reference, and the expression is an lvalue. 2226inline QualType QualType::getNonReferenceType() const { 2227 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 2228 return RefType->getPointeeType(); 2229 else 2230 return *this; 2231} 2232 2233inline const TypedefType* Type::getAsTypedefType() const { 2234 return dyn_cast<TypedefType>(this); 2235} 2236inline const ObjCInterfaceType *Type::getAsPointerToObjCInterfaceType() const { 2237 if (const PointerType *PT = getAs<PointerType>()) 2238 return PT->getPointeeType()->getAsObjCInterfaceType(); 2239 return 0; 2240} 2241 2242// NOTE: All of these methods use "getUnqualifiedType" to strip off address 2243// space qualifiers if present. 2244inline bool Type::isFunctionType() const { 2245 return isa<FunctionType>(CanonicalType.getUnqualifiedType()); 2246} 2247inline bool Type::isPointerType() const { 2248 return isa<PointerType>(CanonicalType.getUnqualifiedType()); 2249} 2250inline bool Type::isAnyPointerType() const { 2251 return isPointerType() || isObjCObjectPointerType(); 2252} 2253inline bool Type::isBlockPointerType() const { 2254 return isa<BlockPointerType>(CanonicalType.getUnqualifiedType()); 2255} 2256inline bool Type::isReferenceType() const { 2257 return isa<ReferenceType>(CanonicalType.getUnqualifiedType()); 2258} 2259inline bool Type::isLValueReferenceType() const { 2260 return isa<LValueReferenceType>(CanonicalType.getUnqualifiedType()); 2261} 2262inline bool Type::isRValueReferenceType() const { 2263 return isa<RValueReferenceType>(CanonicalType.getUnqualifiedType()); 2264} 2265inline bool Type::isFunctionPointerType() const { 2266 if (const PointerType* T = getAs<PointerType>()) 2267 return T->getPointeeType()->isFunctionType(); 2268 else 2269 return false; 2270} 2271inline bool Type::isMemberPointerType() const { 2272 return isa<MemberPointerType>(CanonicalType.getUnqualifiedType()); 2273} 2274inline bool Type::isMemberFunctionPointerType() const { 2275 if (const MemberPointerType* T = getAs<MemberPointerType>()) 2276 return T->getPointeeType()->isFunctionType(); 2277 else 2278 return false; 2279} 2280inline bool Type::isArrayType() const { 2281 return isa<ArrayType>(CanonicalType.getUnqualifiedType()); 2282} 2283inline bool Type::isConstantArrayType() const { 2284 return isa<ConstantArrayType>(CanonicalType.getUnqualifiedType()); 2285} 2286inline bool Type::isIncompleteArrayType() const { 2287 return isa<IncompleteArrayType>(CanonicalType.getUnqualifiedType()); 2288} 2289inline bool Type::isVariableArrayType() const { 2290 return isa<VariableArrayType>(CanonicalType.getUnqualifiedType()); 2291} 2292inline bool Type::isDependentSizedArrayType() const { 2293 return isa<DependentSizedArrayType>(CanonicalType.getUnqualifiedType()); 2294} 2295inline bool Type::isRecordType() const { 2296 return isa<RecordType>(CanonicalType.getUnqualifiedType()); 2297} 2298inline bool Type::isAnyComplexType() const { 2299 return isa<ComplexType>(CanonicalType.getUnqualifiedType()); 2300} 2301inline bool Type::isVectorType() const { 2302 return isa<VectorType>(CanonicalType.getUnqualifiedType()); 2303} 2304inline bool Type::isExtVectorType() const { 2305 return isa<ExtVectorType>(CanonicalType.getUnqualifiedType()); 2306} 2307inline bool Type::isObjCObjectPointerType() const { 2308 return isa<ObjCObjectPointerType>(CanonicalType.getUnqualifiedType()); 2309} 2310inline bool Type::isObjCInterfaceType() const { 2311 return isa<ObjCInterfaceType>(CanonicalType.getUnqualifiedType()); 2312} 2313inline bool Type::isObjCQualifiedIdType() const { 2314 if (const ObjCObjectPointerType *OPT = getAsObjCObjectPointerType()) 2315 return OPT->isObjCQualifiedIdType(); 2316 return false; 2317} 2318inline bool Type::isObjCQualifiedClassType() const { 2319 if (const ObjCObjectPointerType *OPT = getAsObjCObjectPointerType()) 2320 return OPT->isObjCQualifiedClassType(); 2321 return false; 2322} 2323inline bool Type::isObjCIdType() const { 2324 if (const ObjCObjectPointerType *OPT = getAsObjCObjectPointerType()) 2325 return OPT->isObjCIdType(); 2326 return false; 2327} 2328inline bool Type::isObjCClassType() const { 2329 if (const ObjCObjectPointerType *OPT = getAsObjCObjectPointerType()) 2330 return OPT->isObjCClassType(); 2331 return false; 2332} 2333inline bool Type::isObjCBuiltinType() const { 2334 return isObjCIdType() || isObjCClassType(); 2335} 2336inline bool Type::isTemplateTypeParmType() const { 2337 return isa<TemplateTypeParmType>(CanonicalType.getUnqualifiedType()); 2338} 2339 2340inline bool Type::isSpecificBuiltinType(unsigned K) const { 2341 if (const BuiltinType *BT = getAsBuiltinType()) 2342 if (BT->getKind() == (BuiltinType::Kind) K) 2343 return true; 2344 return false; 2345} 2346 2347/// \brief Determines whether this is a type for which one can define 2348/// an overloaded operator. 2349inline bool Type::isOverloadableType() const { 2350 return isDependentType() || isRecordType() || isEnumeralType(); 2351} 2352 2353inline bool Type::hasPointerRepresentation() const { 2354 return (isPointerType() || isReferenceType() || isBlockPointerType() || 2355 isObjCInterfaceType() || isObjCObjectPointerType() || 2356 isObjCQualifiedInterfaceType() || isNullPtrType()); 2357} 2358 2359inline bool Type::hasObjCPointerRepresentation() const { 2360 return (isObjCInterfaceType() || isObjCObjectPointerType() || 2361 isObjCQualifiedInterfaceType()); 2362} 2363 2364/// Insertion operator for diagnostics. This allows sending QualType's into a 2365/// diagnostic with <<. 2366inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 2367 QualType T) { 2368 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 2369 Diagnostic::ak_qualtype); 2370 return DB; 2371} 2372 2373/// Member-template getAs<specific type>'. 2374template <typename T> const T *Type::getAs() const { 2375 // If this is directly a T type, return it. 2376 if (const T *Ty = dyn_cast<T>(this)) 2377 return Ty; 2378 2379 // If the canonical form of this type isn't the right kind, reject it. 2380 if (!isa<T>(CanonicalType)) { 2381 // Look through type qualifiers 2382 if (isa<T>(CanonicalType.getUnqualifiedType())) 2383 return CanonicalType.getUnqualifiedType()->getAs<T>(); 2384 return 0; 2385 } 2386 2387 // If this is a typedef for a pointer type, strip the typedef off without 2388 // losing all typedef information. 2389 return cast<T>(getDesugaredType()); 2390} 2391 2392} // end namespace clang 2393 2394#endif 2395