Type.h revision 6a6c0971f29d9fb7cb5e7318a4a493ed1331258c
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/ADT/APSInt.h" 23#include "llvm/ADT/FoldingSet.h" 24#include "llvm/ADT/PointerIntPair.h" 25#include "llvm/ADT/PointerUnion.h" 26 27using llvm::isa; 28using llvm::cast; 29using llvm::cast_or_null; 30using llvm::dyn_cast; 31using llvm::dyn_cast_or_null; 32namespace clang { class Type; } 33 34namespace llvm { 35 template <typename T> 36 class PointerLikeTypeTraits; 37 template<> 38 class PointerLikeTypeTraits< ::clang::Type*> { 39 public: 40 static inline void *getAsVoidPointer(::clang::Type *P) { return P; } 41 static inline ::clang::Type *getFromVoidPointer(void *P) { 42 return static_cast< ::clang::Type*>(P); 43 } 44 enum { NumLowBitsAvailable = 3 }; 45 }; 46} 47 48namespace clang { 49 class ASTContext; 50 class TypedefDecl; 51 class TemplateDecl; 52 class TemplateTypeParmDecl; 53 class NonTypeTemplateParmDecl; 54 class TemplateTemplateParmDecl; 55 class TagDecl; 56 class RecordDecl; 57 class CXXRecordDecl; 58 class EnumDecl; 59 class FieldDecl; 60 class ObjCInterfaceDecl; 61 class ObjCProtocolDecl; 62 class ObjCMethodDecl; 63 class Expr; 64 class Stmt; 65 class SourceLocation; 66 class StmtIteratorBase; 67 class TemplateArgument; 68 class QualifiedNameType; 69 struct PrintingPolicy; 70 71 // Provide forward declarations for all of the *Type classes 72#define TYPE(Class, Base) class Class##Type; 73#include "clang/AST/TypeNodes.def" 74 75/// QualType - For efficiency, we don't store CVR-qualified types as nodes on 76/// their own: instead each reference to a type stores the qualifiers. This 77/// greatly reduces the number of nodes we need to allocate for types (for 78/// example we only need one for 'int', 'const int', 'volatile int', 79/// 'const volatile int', etc). 80/// 81/// As an added efficiency bonus, instead of making this a pair, we just store 82/// the three bits we care about in the low bits of the pointer. To handle the 83/// packing/unpacking, we make QualType be a simple wrapper class that acts like 84/// a smart pointer. 85class QualType { 86 llvm::PointerIntPair<Type*, 3> Value; 87public: 88 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 89 Const = 0x1, 90 Restrict = 0x2, 91 Volatile = 0x4, 92 CVRFlags = Const|Restrict|Volatile 93 }; 94 95 enum GCAttrTypes { 96 GCNone = 0, 97 Weak, 98 Strong 99 }; 100 101 QualType() {} 102 103 QualType(const Type *Ptr, unsigned Quals) 104 : Value(const_cast<Type*>(Ptr), Quals) {} 105 106 unsigned getCVRQualifiers() const { return Value.getInt(); } 107 void setCVRQualifiers(unsigned Quals) { Value.setInt(Quals); } 108 Type *getTypePtr() const { return Value.getPointer(); } 109 110 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 111 static QualType getFromOpaquePtr(void *Ptr) { 112 QualType T; 113 T.Value.setFromOpaqueValue(Ptr); 114 return T; 115 } 116 117 Type &operator*() const { 118 return *getTypePtr(); 119 } 120 121 Type *operator->() const { 122 return getTypePtr(); 123 } 124 125 /// isNull - Return true if this QualType doesn't point to a type yet. 126 bool isNull() const { 127 return getTypePtr() == 0; 128 } 129 130 bool isConstQualified() const { 131 return (getCVRQualifiers() & Const) ? true : false; 132 } 133 bool isVolatileQualified() const { 134 return (getCVRQualifiers() & Volatile) ? true : false; 135 } 136 bool isRestrictQualified() const { 137 return (getCVRQualifiers() & Restrict) ? true : false; 138 } 139 140 bool isConstant(ASTContext& Ctx) const; 141 142 /// addConst/addVolatile/addRestrict - add the specified type qual to this 143 /// QualType. 144 void addConst() { Value.setInt(Value.getInt() | Const); } 145 void addVolatile() { Value.setInt(Value.getInt() | Volatile); } 146 void addRestrict() { Value.setInt(Value.getInt() | Restrict); } 147 148 void removeConst() { Value.setInt(Value.getInt() & ~Const); } 149 void removeVolatile() { Value.setInt(Value.getInt() & ~Volatile); } 150 void removeRestrict() { Value.setInt(Value.getInt() & ~Restrict); } 151 152 QualType getQualifiedType(unsigned TQs) const { 153 return QualType(getTypePtr(), TQs); 154 } 155 QualType getWithAdditionalQualifiers(unsigned TQs) const { 156 return QualType(getTypePtr(), TQs|getCVRQualifiers()); 157 } 158 159 QualType withConst() const { return getWithAdditionalQualifiers(Const); } 160 QualType withVolatile() const { return getWithAdditionalQualifiers(Volatile);} 161 QualType withRestrict() const { return getWithAdditionalQualifiers(Restrict);} 162 163 QualType getUnqualifiedType() const; 164 bool isMoreQualifiedThan(QualType Other) const; 165 bool isAtLeastAsQualifiedAs(QualType Other) const; 166 QualType getNonReferenceType() const; 167 168 /// getDesugaredType - Return the specified type with any "sugar" removed from 169 /// the type. This takes off typedefs, typeof's etc. If the outer level of 170 /// the type is already concrete, it returns it unmodified. This is similar 171 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 172 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 173 /// concrete. 174 QualType getDesugaredType(bool ForDisplay = false) const; 175 176 /// operator==/!= - Indicate whether the specified types and qualifiers are 177 /// identical. 178 bool operator==(const QualType &RHS) const { 179 return Value == RHS.Value; 180 } 181 bool operator!=(const QualType &RHS) const { 182 return Value != RHS.Value; 183 } 184 std::string getAsString() const; 185 186 std::string getAsString(const PrintingPolicy &Policy) const { 187 std::string S; 188 getAsStringInternal(S, Policy); 189 return S; 190 } 191 void getAsStringInternal(std::string &Str, 192 const PrintingPolicy &Policy) const; 193 194 void dump(const char *s) const; 195 void dump() const; 196 197 void Profile(llvm::FoldingSetNodeID &ID) const { 198 ID.AddPointer(getAsOpaquePtr()); 199 } 200 201public: 202 203 /// getAddressSpace - Return the address space of this type. 204 inline unsigned getAddressSpace() const; 205 206 /// GCAttrTypesAttr - Returns gc attribute of this type. 207 inline QualType::GCAttrTypes getObjCGCAttr() const; 208 209 /// isObjCGCWeak true when Type is objc's weak. 210 bool isObjCGCWeak() const { 211 return getObjCGCAttr() == Weak; 212 } 213 214 /// isObjCGCStrong true when Type is objc's strong. 215 bool isObjCGCStrong() const { 216 return getObjCGCAttr() == Strong; 217 } 218}; 219 220} // end clang. 221 222namespace llvm { 223/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 224/// to a specific Type class. 225template<> struct simplify_type<const ::clang::QualType> { 226 typedef ::clang::Type* SimpleType; 227 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 228 return Val.getTypePtr(); 229 } 230}; 231template<> struct simplify_type< ::clang::QualType> 232 : public simplify_type<const ::clang::QualType> {}; 233 234// Teach SmallPtrSet that QualType is "basically a pointer". 235template<> 236class PointerLikeTypeTraits<clang::QualType> { 237public: 238 static inline void *getAsVoidPointer(clang::QualType P) { 239 return P.getAsOpaquePtr(); 240 } 241 static inline clang::QualType getFromVoidPointer(void *P) { 242 return clang::QualType::getFromOpaquePtr(P); 243 } 244 // CVR qualifiers go in low bits. 245 enum { NumLowBitsAvailable = 0 }; 246}; 247} // end namespace llvm 248 249namespace clang { 250 251/// Type - This is the base class of the type hierarchy. A central concept 252/// with types is that each type always has a canonical type. A canonical type 253/// is the type with any typedef names stripped out of it or the types it 254/// references. For example, consider: 255/// 256/// typedef int foo; 257/// typedef foo* bar; 258/// 'int *' 'foo *' 'bar' 259/// 260/// There will be a Type object created for 'int'. Since int is canonical, its 261/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 262/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 263/// there is a PointerType that represents 'int*', which, like 'int', is 264/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 265/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 266/// is also 'int*'. 267/// 268/// Non-canonical types are useful for emitting diagnostics, without losing 269/// information about typedefs being used. Canonical types are useful for type 270/// comparisons (they allow by-pointer equality tests) and useful for reasoning 271/// about whether something has a particular form (e.g. is a function type), 272/// because they implicitly, recursively, strip all typedefs out of a type. 273/// 274/// Types, once created, are immutable. 275/// 276class Type { 277public: 278 enum TypeClass { 279#define TYPE(Class, Base) Class, 280#define ABSTRACT_TYPE(Class, Base) 281#include "clang/AST/TypeNodes.def" 282 TagFirst = Record, TagLast = Enum 283 }; 284 285private: 286 QualType CanonicalType; 287 288 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 289 bool Dependent : 1; 290 291 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 292 /// Note that this should stay at the end of the ivars for Type so that 293 /// subclasses can pack their bitfields into the same word. 294 unsigned TC : 6; 295 296 Type(const Type&); // DO NOT IMPLEMENT. 297 void operator=(const Type&); // DO NOT IMPLEMENT. 298protected: 299 // silence VC++ warning C4355: 'this' : used in base member initializer list 300 Type *this_() { return this; } 301 Type(TypeClass tc, QualType Canonical, bool dependent) 302 : CanonicalType(Canonical.isNull() ? QualType(this_(), 0) : Canonical), 303 Dependent(dependent), TC(tc) {} 304 virtual ~Type() {} 305 virtual void Destroy(ASTContext& C); 306 friend class ASTContext; 307 308public: 309 TypeClass getTypeClass() const { return static_cast<TypeClass>(TC); } 310 311 bool isCanonical() const { return CanonicalType.getTypePtr() == this; } 312 313 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 314 /// object types, function types, and incomplete types. 315 316 /// \brief Determines whether the type describes an object in memory. 317 /// 318 /// Note that this definition of object type corresponds to the C++ 319 /// definition of object type, which includes incomplete types, as 320 /// opposed to the C definition (which does not include incomplete 321 /// types). 322 bool isObjectType() const; 323 324 /// isIncompleteType - Return true if this is an incomplete type. 325 /// A type that can describe objects, but which lacks information needed to 326 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 327 /// routine will need to determine if the size is actually required. 328 bool isIncompleteType() const; 329 330 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 331 /// type, in other words, not a function type. 332 bool isIncompleteOrObjectType() const { 333 return !isFunctionType(); 334 } 335 336 /// isPODType - Return true if this is a plain-old-data type (C++ 3.9p10). 337 bool isPODType() const; 338 339 /// isVariablyModifiedType (C99 6.7.5.2p2) - Return true for variable array 340 /// types that have a non-constant expression. This does not include "[]". 341 bool isVariablyModifiedType() const; 342 343 /// Helper methods to distinguish type categories. All type predicates 344 /// operate on the canonical type, ignoring typedefs and qualifiers. 345 346 /// isSpecificBuiltinType - Test for a particular builtin type. 347 bool isSpecificBuiltinType(unsigned K) const; 348 349 /// isIntegerType() does *not* include complex integers (a GCC extension). 350 /// isComplexIntegerType() can be used to test for complex integers. 351 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 352 bool isEnumeralType() const; 353 bool isBooleanType() const; 354 bool isCharType() const; 355 bool isWideCharType() const; 356 bool isIntegralType() const; 357 358 /// Floating point categories. 359 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 360 /// isComplexType() does *not* include complex integers (a GCC extension). 361 /// isComplexIntegerType() can be used to test for complex integers. 362 bool isComplexType() const; // C99 6.2.5p11 (complex) 363 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 364 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 365 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 366 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 367 bool isVoidType() const; // C99 6.2.5p19 368 bool isDerivedType() const; // C99 6.2.5p20 369 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 370 bool isAggregateType() const; 371 372 // Type Predicates: Check to see if this type is structurally the specified 373 // type, ignoring typedefs and qualifiers. 374 bool isFunctionType() const; 375 bool isFunctionNoProtoType() const { return getAsFunctionNoProtoType() != 0; } 376 bool isFunctionProtoType() const { return getAsFunctionProtoType() != 0; } 377 bool isPointerType() const; 378 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 379 bool isBlockPointerType() const; 380 bool isVoidPointerType() const; 381 bool isReferenceType() const; 382 bool isLValueReferenceType() const; 383 bool isRValueReferenceType() const; 384 bool isFunctionPointerType() const; 385 bool isMemberPointerType() const; 386 bool isMemberFunctionPointerType() const; 387 bool isArrayType() const; 388 bool isConstantArrayType() const; 389 bool isIncompleteArrayType() const; 390 bool isVariableArrayType() const; 391 bool isDependentSizedArrayType() const; 392 bool isRecordType() const; 393 bool isClassType() const; 394 bool isStructureType() const; 395 bool isUnionType() const; 396 bool isComplexIntegerType() const; // GCC _Complex integer type. 397 bool isVectorType() const; // GCC vector type. 398 bool isExtVectorType() const; // Extended vector type. 399 bool isObjCObjectPointerType() const; // Pointer to *any* ObjC object. 400 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 401 // for the common case. 402 bool isObjCInterfaceType() const; // NSString or NSString<foo> 403 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 404 bool isObjCQualifiedIdType() const; // id<foo> 405 bool isObjCIdType() const; // id 406 bool isObjCClassType() const; // Class 407 bool isObjCBuiltinType() const; // 'id' or 'Class' 408 bool isTemplateTypeParmType() const; // C++ template type parameter 409 bool isNullPtrType() const; // C++0x nullptr_t 410 411 /// isDependentType - Whether this type is a dependent type, meaning 412 /// that its definition somehow depends on a template parameter 413 /// (C++ [temp.dep.type]). 414 bool isDependentType() const { return Dependent; } 415 bool isOverloadableType() const; 416 417 /// hasPointerRepresentation - Whether this type is represented 418 /// natively as a pointer; this includes pointers, references, block 419 /// pointers, and Objective-C interface, qualified id, and qualified 420 /// interface types, as well as nullptr_t. 421 bool hasPointerRepresentation() const; 422 423 /// hasObjCPointerRepresentation - Whether this type can represent 424 /// an objective pointer type for the purpose of GC'ability 425 bool hasObjCPointerRepresentation() const; 426 427 // Type Checking Functions: Check to see if this type is structurally the 428 // specified type, ignoring typedefs and qualifiers, and return a pointer to 429 // the best type we can. 430 const BuiltinType *getAsBuiltinType() const; 431 const FunctionType *getAsFunctionType() const; 432 const FunctionNoProtoType *getAsFunctionNoProtoType() const; 433 const FunctionProtoType *getAsFunctionProtoType() const; 434 const LValueReferenceType *getAsLValueReferenceType() const; 435 const RValueReferenceType *getAsRValueReferenceType() const; 436 const MemberPointerType *getAsMemberPointerType() const; 437 const TagType *getAsTagType() const; 438 const RecordType *getAsRecordType() const; 439 const RecordType *getAsStructureType() const; 440 /// NOTE: getAs*ArrayType are methods on ASTContext. 441 const TypedefType *getAsTypedefType() const; 442 const RecordType *getAsUnionType() const; 443 const EnumType *getAsEnumType() const; 444 const VectorType *getAsVectorType() const; // GCC vector type. 445 const ComplexType *getAsComplexType() const; 446 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 447 const ExtVectorType *getAsExtVectorType() const; // Extended vector type. 448 const ObjCObjectPointerType *getAsObjCObjectPointerType() const; 449 // The following is a convenience method that returns an ObjCObjectPointerType 450 // for object declared using an interface. 451 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 452 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 453 const ObjCInterfaceType *getAsObjCInterfaceType() const; 454 const ObjCQualifiedInterfaceType *getAsObjCQualifiedInterfaceType() const; 455 const TemplateTypeParmType *getAsTemplateTypeParmType() const; 456 457 // Member-template getAs<specific type>'. This scheme will eventually 458 // replace the specific getAsXXXX methods above. 459 template <typename T> const T *getAs() const; 460 461 const TemplateSpecializationType * 462 getAsTemplateSpecializationType() const; 463 464 /// getAsPointerToObjCInterfaceType - If this is a pointer to an ObjC 465 /// interface, return the interface type, otherwise return null. 466 const ObjCInterfaceType *getAsPointerToObjCInterfaceType() const; 467 468 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 469 /// element type of the array, potentially with type qualifiers missing. 470 /// This method should never be used when type qualifiers are meaningful. 471 const Type *getArrayElementTypeNoTypeQual() const; 472 473 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 474 /// pointer, this returns the respective pointee. 475 QualType getPointeeType() const; 476 477 /// getDesugaredType - Return the specified type with any "sugar" removed from 478 /// the type. This takes off typedefs, typeof's etc. If the outer level of 479 /// the type is already concrete, it returns it unmodified. This is similar 480 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 481 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 482 /// concrete. 483 QualType getDesugaredType(bool ForDisplay = false) const; 484 485 /// More type predicates useful for type checking/promotion 486 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 487 488 /// isSignedIntegerType - Return true if this is an integer type that is 489 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 490 /// an enum decl which has a signed representation, or a vector of signed 491 /// integer element type. 492 bool isSignedIntegerType() const; 493 494 /// isUnsignedIntegerType - Return true if this is an integer type that is 495 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 496 /// decl which has an unsigned representation, or a vector of unsigned integer 497 /// element type. 498 bool isUnsignedIntegerType() const; 499 500 /// isConstantSizeType - Return true if this is not a variable sized type, 501 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 502 /// incomplete types. 503 bool isConstantSizeType() const; 504 505 /// isSpecifierType - Returns true if this type can be represented by some 506 /// set of type specifiers. 507 bool isSpecifierType() const; 508 509 QualType getCanonicalTypeInternal() const { return CanonicalType; } 510 void dump() const; 511 virtual void getAsStringInternal(std::string &InnerString, 512 const PrintingPolicy &Policy) const = 0; 513 static bool classof(const Type *) { return true; } 514}; 515 516/// ExtQualType - TR18037 (C embedded extensions) 6.2.5p26 517/// This supports all kinds of type attributes; including, 518/// address space qualified types, objective-c's __weak and 519/// __strong attributes. 520/// 521class ExtQualType : public Type, public llvm::FoldingSetNode { 522 /// BaseType - This is the underlying type that this qualifies. All CVR 523 /// qualifiers are stored on the QualType that references this type, so we 524 /// can't have any here. 525 Type *BaseType; 526 527 /// Address Space ID - The address space ID this type is qualified with. 528 unsigned AddressSpace; 529 /// GC __weak/__strong attributes 530 QualType::GCAttrTypes GCAttrType; 531 532 ExtQualType(Type *Base, QualType CanonicalPtr, unsigned AddrSpace, 533 QualType::GCAttrTypes gcAttr) : 534 Type(ExtQual, CanonicalPtr, Base->isDependentType()), BaseType(Base), 535 AddressSpace(AddrSpace), GCAttrType(gcAttr) { 536 assert(!isa<ExtQualType>(BaseType) && 537 "Cannot have ExtQualType of ExtQualType"); 538 } 539 friend class ASTContext; // ASTContext creates these. 540public: 541 Type *getBaseType() const { return BaseType; } 542 QualType::GCAttrTypes getObjCGCAttr() const { return GCAttrType; } 543 unsigned getAddressSpace() const { return AddressSpace; } 544 545 virtual void getAsStringInternal(std::string &InnerString, 546 const PrintingPolicy &Policy) const; 547 548 void Profile(llvm::FoldingSetNodeID &ID) { 549 Profile(ID, getBaseType(), AddressSpace, GCAttrType); 550 } 551 static void Profile(llvm::FoldingSetNodeID &ID, Type *Base, 552 unsigned AddrSpace, QualType::GCAttrTypes gcAttr) { 553 ID.AddPointer(Base); 554 ID.AddInteger(AddrSpace); 555 ID.AddInteger(gcAttr); 556 } 557 558 static bool classof(const Type *T) { return T->getTypeClass() == ExtQual; } 559 static bool classof(const ExtQualType *) { return true; } 560}; 561 562 563/// BuiltinType - This class is used for builtin types like 'int'. Builtin 564/// types are always canonical and have a literal name field. 565class BuiltinType : public Type { 566public: 567 enum Kind { 568 Void, 569 570 Bool, // This is bool and/or _Bool. 571 Char_U, // This is 'char' for targets where char is unsigned. 572 UChar, // This is explicitly qualified unsigned char. 573 Char16, // This is 'char16_t' for C++. 574 Char32, // This is 'char32_t' for C++. 575 UShort, 576 UInt, 577 ULong, 578 ULongLong, 579 UInt128, // __uint128_t 580 581 Char_S, // This is 'char' for targets where char is signed. 582 SChar, // This is explicitly qualified signed char. 583 WChar, // This is 'wchar_t' for C++. 584 Short, 585 Int, 586 Long, 587 LongLong, 588 Int128, // __int128_t 589 590 Float, Double, LongDouble, 591 592 NullPtr, // This is the type of C++0x 'nullptr'. 593 594 Overload, // This represents the type of an overloaded function declaration. 595 Dependent, // This represents the type of a type-dependent expression. 596 597 UndeducedAuto, // In C++0x, this represents the type of an auto variable 598 // that has not been deduced yet. 599 ObjCId, // This represents the ObjC 'id' type. 600 ObjCClass // This represents the ObjC 'Class' type. 601 }; 602private: 603 Kind TypeKind; 604public: 605 BuiltinType(Kind K) 606 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent)), 607 TypeKind(K) {} 608 609 Kind getKind() const { return TypeKind; } 610 const char *getName(const LangOptions &LO) const; 611 612 virtual void getAsStringInternal(std::string &InnerString, 613 const PrintingPolicy &Policy) const; 614 615 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 616 static bool classof(const BuiltinType *) { return true; } 617}; 618 619/// FixedWidthIntType - Used for arbitrary width types that we either don't 620/// want to or can't map to named integer types. These always have a lower 621/// integer rank than builtin types of the same width. 622class FixedWidthIntType : public Type { 623private: 624 unsigned Width; 625 bool Signed; 626public: 627 FixedWidthIntType(unsigned W, bool S) : Type(FixedWidthInt, QualType(), false), 628 Width(W), Signed(S) {} 629 630 unsigned getWidth() const { return Width; } 631 bool isSigned() const { return Signed; } 632 const char *getName() const; 633 634 virtual void getAsStringInternal(std::string &InnerString, 635 const PrintingPolicy &Policy) const; 636 637 static bool classof(const Type *T) { return T->getTypeClass() == FixedWidthInt; } 638 static bool classof(const FixedWidthIntType *) { return true; } 639}; 640 641/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 642/// types (_Complex float etc) as well as the GCC integer complex extensions. 643/// 644class ComplexType : public Type, public llvm::FoldingSetNode { 645 QualType ElementType; 646 ComplexType(QualType Element, QualType CanonicalPtr) : 647 Type(Complex, CanonicalPtr, Element->isDependentType()), 648 ElementType(Element) { 649 } 650 friend class ASTContext; // ASTContext creates these. 651public: 652 QualType getElementType() const { return ElementType; } 653 654 virtual void getAsStringInternal(std::string &InnerString, 655 const PrintingPolicy &Policy) const; 656 657 void Profile(llvm::FoldingSetNodeID &ID) { 658 Profile(ID, getElementType()); 659 } 660 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 661 ID.AddPointer(Element.getAsOpaquePtr()); 662 } 663 664 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 665 static bool classof(const ComplexType *) { return true; } 666}; 667 668/// PointerType - C99 6.7.5.1 - Pointer Declarators. 669/// 670class PointerType : public Type, public llvm::FoldingSetNode { 671 QualType PointeeType; 672 673 PointerType(QualType Pointee, QualType CanonicalPtr) : 674 Type(Pointer, CanonicalPtr, Pointee->isDependentType()), PointeeType(Pointee) { 675 } 676 friend class ASTContext; // ASTContext creates these. 677public: 678 679 virtual void getAsStringInternal(std::string &InnerString, 680 const PrintingPolicy &Policy) const; 681 682 QualType getPointeeType() const { return PointeeType; } 683 684 void Profile(llvm::FoldingSetNodeID &ID) { 685 Profile(ID, getPointeeType()); 686 } 687 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 688 ID.AddPointer(Pointee.getAsOpaquePtr()); 689 } 690 691 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 692 static bool classof(const PointerType *) { return true; } 693}; 694 695/// BlockPointerType - pointer to a block type. 696/// This type is to represent types syntactically represented as 697/// "void (^)(int)", etc. Pointee is required to always be a function type. 698/// 699class BlockPointerType : public Type, public llvm::FoldingSetNode { 700 QualType PointeeType; // Block is some kind of pointer type 701 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 702 Type(BlockPointer, CanonicalCls, Pointee->isDependentType()), 703 PointeeType(Pointee) { 704 } 705 friend class ASTContext; // ASTContext creates these. 706public: 707 708 // Get the pointee type. Pointee is required to always be a function type. 709 QualType getPointeeType() const { return PointeeType; } 710 711 virtual void getAsStringInternal(std::string &InnerString, 712 const PrintingPolicy &Policy) const; 713 714 void Profile(llvm::FoldingSetNodeID &ID) { 715 Profile(ID, getPointeeType()); 716 } 717 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 718 ID.AddPointer(Pointee.getAsOpaquePtr()); 719 } 720 721 static bool classof(const Type *T) { 722 return T->getTypeClass() == BlockPointer; 723 } 724 static bool classof(const BlockPointerType *) { return true; } 725}; 726 727/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 728/// 729class ReferenceType : public Type, public llvm::FoldingSetNode { 730 QualType PointeeType; 731 732protected: 733 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef) : 734 Type(tc, CanonicalRef, Referencee->isDependentType()), 735 PointeeType(Referencee) { 736 } 737public: 738 QualType getPointeeType() const { return PointeeType; } 739 740 void Profile(llvm::FoldingSetNodeID &ID) { 741 Profile(ID, getPointeeType()); 742 } 743 static void Profile(llvm::FoldingSetNodeID &ID, QualType Referencee) { 744 ID.AddPointer(Referencee.getAsOpaquePtr()); 745 } 746 747 static bool classof(const Type *T) { 748 return T->getTypeClass() == LValueReference || 749 T->getTypeClass() == RValueReference; 750 } 751 static bool classof(const ReferenceType *) { return true; } 752}; 753 754/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 755/// 756class LValueReferenceType : public ReferenceType { 757 LValueReferenceType(QualType Referencee, QualType CanonicalRef) : 758 ReferenceType(LValueReference, Referencee, CanonicalRef) { 759 } 760 friend class ASTContext; // ASTContext creates these 761public: 762 virtual void getAsStringInternal(std::string &InnerString, 763 const PrintingPolicy &Policy) const; 764 765 static bool classof(const Type *T) { 766 return T->getTypeClass() == LValueReference; 767 } 768 static bool classof(const LValueReferenceType *) { return true; } 769}; 770 771/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 772/// 773class RValueReferenceType : public ReferenceType { 774 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 775 ReferenceType(RValueReference, Referencee, CanonicalRef) { 776 } 777 friend class ASTContext; // ASTContext creates these 778public: 779 virtual void getAsStringInternal(std::string &InnerString, 780 const PrintingPolicy &Policy) const; 781 782 static bool classof(const Type *T) { 783 return T->getTypeClass() == RValueReference; 784 } 785 static bool classof(const RValueReferenceType *) { return true; } 786}; 787 788/// MemberPointerType - C++ 8.3.3 - Pointers to members 789/// 790class MemberPointerType : public Type, public llvm::FoldingSetNode { 791 QualType PointeeType; 792 /// The class of which the pointee is a member. Must ultimately be a 793 /// RecordType, but could be a typedef or a template parameter too. 794 const Type *Class; 795 796 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 797 Type(MemberPointer, CanonicalPtr, 798 Cls->isDependentType() || Pointee->isDependentType()), 799 PointeeType(Pointee), Class(Cls) { 800 } 801 friend class ASTContext; // ASTContext creates these. 802public: 803 804 QualType getPointeeType() const { return PointeeType; } 805 806 const Type *getClass() const { return Class; } 807 808 virtual void getAsStringInternal(std::string &InnerString, 809 const PrintingPolicy &Policy) const; 810 811 void Profile(llvm::FoldingSetNodeID &ID) { 812 Profile(ID, getPointeeType(), getClass()); 813 } 814 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 815 const Type *Class) { 816 ID.AddPointer(Pointee.getAsOpaquePtr()); 817 ID.AddPointer(Class); 818 } 819 820 static bool classof(const Type *T) { 821 return T->getTypeClass() == MemberPointer; 822 } 823 static bool classof(const MemberPointerType *) { return true; } 824}; 825 826/// ArrayType - C99 6.7.5.2 - Array Declarators. 827/// 828class ArrayType : public Type, public llvm::FoldingSetNode { 829public: 830 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 831 /// an array with a static size (e.g. int X[static 4]), or an array 832 /// with a star size (e.g. int X[*]). 833 /// 'static' is only allowed on function parameters. 834 enum ArraySizeModifier { 835 Normal, Static, Star 836 }; 837private: 838 /// ElementType - The element type of the array. 839 QualType ElementType; 840 841 // NOTE: VC++ treats enums as signed, avoid using the ArraySizeModifier enum 842 /// NOTE: These fields are packed into the bitfields space in the Type class. 843 unsigned SizeModifier : 2; 844 845 /// IndexTypeQuals - Capture qualifiers in declarations like: 846 /// 'int X[static restrict 4]'. For function parameters only. 847 unsigned IndexTypeQuals : 3; 848 849protected: 850 // C++ [temp.dep.type]p1: 851 // A type is dependent if it is... 852 // - an array type constructed from any dependent type or whose 853 // size is specified by a constant expression that is 854 // value-dependent, 855 ArrayType(TypeClass tc, QualType et, QualType can, 856 ArraySizeModifier sm, unsigned tq) 857 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray), 858 ElementType(et), SizeModifier(sm), IndexTypeQuals(tq) {} 859 860 friend class ASTContext; // ASTContext creates these. 861public: 862 QualType getElementType() const { return ElementType; } 863 ArraySizeModifier getSizeModifier() const { 864 return ArraySizeModifier(SizeModifier); 865 } 866 unsigned getIndexTypeQualifier() const { return IndexTypeQuals; } 867 868 static bool classof(const Type *T) { 869 return T->getTypeClass() == ConstantArray || 870 T->getTypeClass() == ConstantArrayWithExpr || 871 T->getTypeClass() == ConstantArrayWithoutExpr || 872 T->getTypeClass() == VariableArray || 873 T->getTypeClass() == IncompleteArray || 874 T->getTypeClass() == DependentSizedArray; 875 } 876 static bool classof(const ArrayType *) { return true; } 877}; 878 879/// ConstantArrayType - This class represents the canonical version of 880/// C arrays with a specified constant size. For example, the canonical 881/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 882/// type is 'int' and the size is 404. 883class ConstantArrayType : public ArrayType { 884 llvm::APInt Size; // Allows us to unique the type. 885 886 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 887 ArraySizeModifier sm, unsigned tq) 888 : ArrayType(ConstantArray, et, can, sm, tq), 889 Size(size) {} 890protected: 891 ConstantArrayType(TypeClass tc, QualType et, QualType can, 892 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 893 : ArrayType(tc, et, can, sm, tq), Size(size) {} 894 friend class ASTContext; // ASTContext creates these. 895public: 896 const llvm::APInt &getSize() const { return Size; } 897 virtual void getAsStringInternal(std::string &InnerString, 898 const PrintingPolicy &Policy) const; 899 900 void Profile(llvm::FoldingSetNodeID &ID) { 901 Profile(ID, getElementType(), getSize(), 902 getSizeModifier(), getIndexTypeQualifier()); 903 } 904 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 905 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 906 unsigned TypeQuals) { 907 ID.AddPointer(ET.getAsOpaquePtr()); 908 ID.AddInteger(ArraySize.getZExtValue()); 909 ID.AddInteger(SizeMod); 910 ID.AddInteger(TypeQuals); 911 } 912 static bool classof(const Type *T) { 913 return T->getTypeClass() == ConstantArray || 914 T->getTypeClass() == ConstantArrayWithExpr || 915 T->getTypeClass() == ConstantArrayWithoutExpr; 916 } 917 static bool classof(const ConstantArrayType *) { return true; } 918}; 919 920/// ConstantArrayWithExprType - This class represents C arrays with a 921/// constant size specified by means of an integer constant expression. 922/// For example 'int A[sizeof(int)]' has ConstantArrayWithExprType where 923/// the element type is 'int' and the size expression is 'sizeof(int)'. 924/// These types are non-canonical. 925class ConstantArrayWithExprType : public ConstantArrayType { 926 /// SizeExpr - The ICE occurring in the concrete syntax. 927 Expr *SizeExpr; 928 /// Brackets - The left and right array brackets. 929 SourceRange Brackets; 930 931 ConstantArrayWithExprType(QualType et, QualType can, 932 const llvm::APInt &size, Expr *e, 933 ArraySizeModifier sm, unsigned tq, 934 SourceRange brackets) 935 : ConstantArrayType(ConstantArrayWithExpr, et, can, size, sm, tq), 936 SizeExpr(e), Brackets(brackets) {} 937 friend class ASTContext; // ASTContext creates these. 938 virtual void Destroy(ASTContext& C); 939 940public: 941 Expr *getSizeExpr() const { return SizeExpr; } 942 SourceRange getBracketsRange() const { return Brackets; } 943 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 944 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 945 946 virtual void getAsStringInternal(std::string &InnerString, 947 const PrintingPolicy &Policy) const; 948 949 static bool classof(const Type *T) { 950 return T->getTypeClass() == ConstantArrayWithExpr; 951 } 952 static bool classof(const ConstantArrayWithExprType *) { return true; } 953 954 void Profile(llvm::FoldingSetNodeID &ID) { 955 assert(0 && "Cannot unique ConstantArrayWithExprTypes."); 956 } 957}; 958 959/// ConstantArrayWithoutExprType - This class represents C arrays with a 960/// constant size that was not specified by an integer constant expression, 961/// but inferred by static semantics. 962/// For example 'int A[] = { 0, 1, 2 }' has ConstantArrayWithoutExprType. 963/// These types are non-canonical: the corresponding canonical type, 964/// having the size specified in an APInt object, is a ConstantArrayType. 965class ConstantArrayWithoutExprType : public ConstantArrayType { 966 967 ConstantArrayWithoutExprType(QualType et, QualType can, 968 const llvm::APInt &size, 969 ArraySizeModifier sm, unsigned tq) 970 : ConstantArrayType(ConstantArrayWithoutExpr, et, can, size, sm, tq) {} 971 friend class ASTContext; // ASTContext creates these. 972 973public: 974 virtual void getAsStringInternal(std::string &InnerString, 975 const PrintingPolicy &Policy) const; 976 977 static bool classof(const Type *T) { 978 return T->getTypeClass() == ConstantArrayWithoutExpr; 979 } 980 static bool classof(const ConstantArrayWithoutExprType *) { return true; } 981 982 void Profile(llvm::FoldingSetNodeID &ID) { 983 assert(0 && "Cannot unique ConstantArrayWithoutExprTypes."); 984 } 985}; 986 987/// IncompleteArrayType - This class represents C arrays with an unspecified 988/// size. For example 'int A[]' has an IncompleteArrayType where the element 989/// type is 'int' and the size is unspecified. 990class IncompleteArrayType : public ArrayType { 991 992 IncompleteArrayType(QualType et, QualType can, 993 ArraySizeModifier sm, unsigned tq) 994 : ArrayType(IncompleteArray, et, can, sm, tq) {} 995 friend class ASTContext; // ASTContext creates these. 996public: 997 virtual void getAsStringInternal(std::string &InnerString, 998 const PrintingPolicy &Policy) const; 999 1000 static bool classof(const Type *T) { 1001 return T->getTypeClass() == IncompleteArray; 1002 } 1003 static bool classof(const IncompleteArrayType *) { return true; } 1004 1005 friend class StmtIteratorBase; 1006 1007 void Profile(llvm::FoldingSetNodeID &ID) { 1008 Profile(ID, getElementType(), getSizeModifier(), getIndexTypeQualifier()); 1009 } 1010 1011 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1012 ArraySizeModifier SizeMod, unsigned TypeQuals) { 1013 ID.AddPointer(ET.getAsOpaquePtr()); 1014 ID.AddInteger(SizeMod); 1015 ID.AddInteger(TypeQuals); 1016 } 1017}; 1018 1019/// VariableArrayType - This class represents C arrays with a specified size 1020/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 1021/// Since the size expression is an arbitrary expression, we store it as such. 1022/// 1023/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 1024/// should not be: two lexically equivalent variable array types could mean 1025/// different things, for example, these variables do not have the same type 1026/// dynamically: 1027/// 1028/// void foo(int x) { 1029/// int Y[x]; 1030/// ++x; 1031/// int Z[x]; 1032/// } 1033/// 1034class VariableArrayType : public ArrayType { 1035 /// SizeExpr - An assignment expression. VLA's are only permitted within 1036 /// a function block. 1037 Stmt *SizeExpr; 1038 /// Brackets - The left and right array brackets. 1039 SourceRange Brackets; 1040 1041 VariableArrayType(QualType et, QualType can, Expr *e, 1042 ArraySizeModifier sm, unsigned tq, 1043 SourceRange brackets) 1044 : ArrayType(VariableArray, et, can, sm, tq), 1045 SizeExpr((Stmt*) e), Brackets(brackets) {} 1046 friend class ASTContext; // ASTContext creates these. 1047 virtual void Destroy(ASTContext& C); 1048 1049public: 1050 Expr *getSizeExpr() const { 1051 // We use C-style casts instead of cast<> here because we do not wish 1052 // to have a dependency of Type.h on Stmt.h/Expr.h. 1053 return (Expr*) SizeExpr; 1054 } 1055 SourceRange getBracketsRange() const { return Brackets; } 1056 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1057 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1058 1059 virtual void getAsStringInternal(std::string &InnerString, 1060 const PrintingPolicy &Policy) const; 1061 1062 static bool classof(const Type *T) { 1063 return T->getTypeClass() == VariableArray; 1064 } 1065 static bool classof(const VariableArrayType *) { return true; } 1066 1067 friend class StmtIteratorBase; 1068 1069 void Profile(llvm::FoldingSetNodeID &ID) { 1070 assert(0 && "Cannnot unique VariableArrayTypes."); 1071 } 1072}; 1073 1074/// DependentSizedArrayType - This type represents an array type in 1075/// C++ whose size is a value-dependent expression. For example: 1076/// @code 1077/// template<typename T, int Size> 1078/// class array { 1079/// T data[Size]; 1080/// }; 1081/// @endcode 1082/// For these types, we won't actually know what the array bound is 1083/// until template instantiation occurs, at which point this will 1084/// become either a ConstantArrayType or a VariableArrayType. 1085class DependentSizedArrayType : public ArrayType { 1086 /// SizeExpr - An assignment expression that will instantiate to the 1087 /// size of the array. 1088 Stmt *SizeExpr; 1089 /// Brackets - The left and right array brackets. 1090 SourceRange Brackets; 1091 1092 DependentSizedArrayType(QualType et, QualType can, Expr *e, 1093 ArraySizeModifier sm, unsigned tq, 1094 SourceRange brackets) 1095 : ArrayType(DependentSizedArray, et, can, sm, tq), 1096 SizeExpr((Stmt*) e), Brackets(brackets) {} 1097 friend class ASTContext; // ASTContext creates these. 1098 virtual void Destroy(ASTContext& C); 1099 1100public: 1101 Expr *getSizeExpr() const { 1102 // We use C-style casts instead of cast<> here because we do not wish 1103 // to have a dependency of Type.h on Stmt.h/Expr.h. 1104 return (Expr*) SizeExpr; 1105 } 1106 SourceRange getBracketsRange() const { return Brackets; } 1107 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1108 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1109 1110 virtual void getAsStringInternal(std::string &InnerString, 1111 const PrintingPolicy &Policy) const; 1112 1113 static bool classof(const Type *T) { 1114 return T->getTypeClass() == DependentSizedArray; 1115 } 1116 static bool classof(const DependentSizedArrayType *) { return true; } 1117 1118 friend class StmtIteratorBase; 1119 1120 void Profile(llvm::FoldingSetNodeID &ID) { 1121 assert(0 && "Cannnot unique DependentSizedArrayTypes."); 1122 } 1123}; 1124 1125/// DependentSizedExtVectorType - This type represent an extended vector type 1126/// where either the type or size is dependent. For example: 1127/// @code 1128/// template<typename T, int Size> 1129/// class vector { 1130/// typedef T __attribute__((ext_vector_type(Size))) type; 1131/// } 1132/// @endcode 1133class DependentSizedExtVectorType : public Type { 1134 Expr *SizeExpr; 1135 /// ElementType - The element type of the array. 1136 QualType ElementType; 1137 SourceLocation loc; 1138 1139 DependentSizedExtVectorType(QualType ElementType, QualType can, 1140 Expr *SizeExpr, SourceLocation loc) 1141 : Type (DependentSizedExtVector, can, true), 1142 SizeExpr(SizeExpr), ElementType(ElementType), loc(loc) {} 1143 friend class ASTContext; 1144 virtual void Destroy(ASTContext& C); 1145 1146public: 1147 const Expr *getSizeExpr() const { return SizeExpr; } 1148 QualType getElementType() const { return ElementType; } 1149 SourceLocation getAttributeLoc() const { return loc; } 1150 1151 virtual void getAsStringInternal(std::string &InnerString, 1152 const PrintingPolicy &Policy) const; 1153 1154 static bool classof(const Type *T) { 1155 return T->getTypeClass() == DependentSizedExtVector; 1156 } 1157 static bool classof(const DependentSizedExtVectorType *) { return true; } 1158}; 1159 1160 1161/// VectorType - GCC generic vector type. This type is created using 1162/// __attribute__((vector_size(n)), where "n" specifies the vector size in 1163/// bytes. Since the constructor takes the number of vector elements, the 1164/// client is responsible for converting the size into the number of elements. 1165class VectorType : public Type, public llvm::FoldingSetNode { 1166protected: 1167 /// ElementType - The element type of the vector. 1168 QualType ElementType; 1169 1170 /// NumElements - The number of elements in the vector. 1171 unsigned NumElements; 1172 1173 VectorType(QualType vecType, unsigned nElements, QualType canonType) : 1174 Type(Vector, canonType, vecType->isDependentType()), 1175 ElementType(vecType), NumElements(nElements) {} 1176 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 1177 QualType canonType) 1178 : Type(tc, canonType, vecType->isDependentType()), ElementType(vecType), 1179 NumElements(nElements) {} 1180 friend class ASTContext; // ASTContext creates these. 1181public: 1182 1183 QualType getElementType() const { return ElementType; } 1184 unsigned getNumElements() const { return NumElements; } 1185 1186 virtual void getAsStringInternal(std::string &InnerString, 1187 const PrintingPolicy &Policy) const; 1188 1189 void Profile(llvm::FoldingSetNodeID &ID) { 1190 Profile(ID, getElementType(), getNumElements(), getTypeClass()); 1191 } 1192 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 1193 unsigned NumElements, TypeClass TypeClass) { 1194 ID.AddPointer(ElementType.getAsOpaquePtr()); 1195 ID.AddInteger(NumElements); 1196 ID.AddInteger(TypeClass); 1197 } 1198 static bool classof(const Type *T) { 1199 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 1200 } 1201 static bool classof(const VectorType *) { return true; } 1202}; 1203 1204/// ExtVectorType - Extended vector type. This type is created using 1205/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 1206/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 1207/// class enables syntactic extensions, like Vector Components for accessing 1208/// points, colors, and textures (modeled after OpenGL Shading Language). 1209class ExtVectorType : public VectorType { 1210 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 1211 VectorType(ExtVector, vecType, nElements, canonType) {} 1212 friend class ASTContext; // ASTContext creates these. 1213public: 1214 static int getPointAccessorIdx(char c) { 1215 switch (c) { 1216 default: return -1; 1217 case 'x': return 0; 1218 case 'y': return 1; 1219 case 'z': return 2; 1220 case 'w': return 3; 1221 } 1222 } 1223 static int getNumericAccessorIdx(char c) { 1224 switch (c) { 1225 default: return -1; 1226 case '0': return 0; 1227 case '1': return 1; 1228 case '2': return 2; 1229 case '3': return 3; 1230 case '4': return 4; 1231 case '5': return 5; 1232 case '6': return 6; 1233 case '7': return 7; 1234 case '8': return 8; 1235 case '9': return 9; 1236 case 'A': 1237 case 'a': return 10; 1238 case 'B': 1239 case 'b': return 11; 1240 case 'C': 1241 case 'c': return 12; 1242 case 'D': 1243 case 'd': return 13; 1244 case 'E': 1245 case 'e': return 14; 1246 case 'F': 1247 case 'f': return 15; 1248 } 1249 } 1250 1251 static int getAccessorIdx(char c) { 1252 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 1253 return getNumericAccessorIdx(c); 1254 } 1255 1256 bool isAccessorWithinNumElements(char c) const { 1257 if (int idx = getAccessorIdx(c)+1) 1258 return unsigned(idx-1) < NumElements; 1259 return false; 1260 } 1261 virtual void getAsStringInternal(std::string &InnerString, 1262 const PrintingPolicy &Policy) const; 1263 1264 static bool classof(const Type *T) { 1265 return T->getTypeClass() == ExtVector; 1266 } 1267 static bool classof(const ExtVectorType *) { return true; } 1268}; 1269 1270/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 1271/// class of FunctionNoProtoType and FunctionProtoType. 1272/// 1273class FunctionType : public Type { 1274 /// SubClassData - This field is owned by the subclass, put here to pack 1275 /// tightly with the ivars in Type. 1276 bool SubClassData : 1; 1277 1278 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1279 /// other bitfields. 1280 /// The qualifiers are part of FunctionProtoType because... 1281 /// 1282 /// C++ 8.3.5p4: The return type, the parameter type list and the 1283 /// cv-qualifier-seq, [...], are part of the function type. 1284 /// 1285 unsigned TypeQuals : 3; 1286 1287 // The type returned by the function. 1288 QualType ResultType; 1289protected: 1290 FunctionType(TypeClass tc, QualType res, bool SubclassInfo, 1291 unsigned typeQuals, QualType Canonical, bool Dependent) 1292 : Type(tc, Canonical, Dependent), 1293 SubClassData(SubclassInfo), TypeQuals(typeQuals), ResultType(res) {} 1294 bool getSubClassData() const { return SubClassData; } 1295 unsigned getTypeQuals() const { return TypeQuals; } 1296public: 1297 1298 QualType getResultType() const { return ResultType; } 1299 1300 1301 static bool classof(const Type *T) { 1302 return T->getTypeClass() == FunctionNoProto || 1303 T->getTypeClass() == FunctionProto; 1304 } 1305 static bool classof(const FunctionType *) { return true; } 1306}; 1307 1308/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 1309/// no information available about its arguments. 1310class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 1311 FunctionNoProtoType(QualType Result, QualType Canonical) 1312 : FunctionType(FunctionNoProto, Result, false, 0, Canonical, 1313 /*Dependent=*/false) {} 1314 friend class ASTContext; // ASTContext creates these. 1315public: 1316 // No additional state past what FunctionType provides. 1317 1318 virtual void getAsStringInternal(std::string &InnerString, 1319 const PrintingPolicy &Policy) const; 1320 1321 void Profile(llvm::FoldingSetNodeID &ID) { 1322 Profile(ID, getResultType()); 1323 } 1324 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType) { 1325 ID.AddPointer(ResultType.getAsOpaquePtr()); 1326 } 1327 1328 static bool classof(const Type *T) { 1329 return T->getTypeClass() == FunctionNoProto; 1330 } 1331 static bool classof(const FunctionNoProtoType *) { return true; } 1332}; 1333 1334/// FunctionProtoType - Represents a prototype with argument type info, e.g. 1335/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 1336/// arguments, not as having a single void argument. Such a type can have an 1337/// exception specification, but this specification is not part of the canonical 1338/// type. 1339class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 1340 /// hasAnyDependentType - Determine whether there are any dependent 1341 /// types within the arguments passed in. 1342 static bool hasAnyDependentType(const QualType *ArgArray, unsigned numArgs) { 1343 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 1344 if (ArgArray[Idx]->isDependentType()) 1345 return true; 1346 1347 return false; 1348 } 1349 1350 FunctionProtoType(QualType Result, const QualType *ArgArray, unsigned numArgs, 1351 bool isVariadic, unsigned typeQuals, bool hasExs, 1352 bool hasAnyExs, const QualType *ExArray, 1353 unsigned numExs, QualType Canonical) 1354 : FunctionType(FunctionProto, Result, isVariadic, typeQuals, Canonical, 1355 (Result->isDependentType() || 1356 hasAnyDependentType(ArgArray, numArgs))), 1357 NumArgs(numArgs), NumExceptions(numExs), HasExceptionSpec(hasExs), 1358 AnyExceptionSpec(hasAnyExs) { 1359 // Fill in the trailing argument array. 1360 QualType *ArgInfo = reinterpret_cast<QualType*>(this+1); 1361 for (unsigned i = 0; i != numArgs; ++i) 1362 ArgInfo[i] = ArgArray[i]; 1363 // Fill in the exception array. 1364 QualType *Ex = ArgInfo + numArgs; 1365 for (unsigned i = 0; i != numExs; ++i) 1366 Ex[i] = ExArray[i]; 1367 } 1368 1369 /// NumArgs - The number of arguments this function has, not counting '...'. 1370 unsigned NumArgs : 20; 1371 1372 /// NumExceptions - The number of types in the exception spec, if any. 1373 unsigned NumExceptions : 10; 1374 1375 /// HasExceptionSpec - Whether this function has an exception spec at all. 1376 bool HasExceptionSpec : 1; 1377 1378 /// AnyExceptionSpec - Whether this function has a throw(...) spec. 1379 bool AnyExceptionSpec : 1; 1380 1381 /// ArgInfo - There is an variable size array after the class in memory that 1382 /// holds the argument types. 1383 1384 /// Exceptions - There is another variable size array after ArgInfo that 1385 /// holds the exception types. 1386 1387 friend class ASTContext; // ASTContext creates these. 1388 1389public: 1390 unsigned getNumArgs() const { return NumArgs; } 1391 QualType getArgType(unsigned i) const { 1392 assert(i < NumArgs && "Invalid argument number!"); 1393 return arg_type_begin()[i]; 1394 } 1395 1396 bool hasExceptionSpec() const { return HasExceptionSpec; } 1397 bool hasAnyExceptionSpec() const { return AnyExceptionSpec; } 1398 unsigned getNumExceptions() const { return NumExceptions; } 1399 QualType getExceptionType(unsigned i) const { 1400 assert(i < NumExceptions && "Invalid exception number!"); 1401 return exception_begin()[i]; 1402 } 1403 bool hasEmptyExceptionSpec() const { 1404 return hasExceptionSpec() && !hasAnyExceptionSpec() && 1405 getNumExceptions() == 0; 1406 } 1407 1408 bool isVariadic() const { return getSubClassData(); } 1409 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 1410 1411 typedef const QualType *arg_type_iterator; 1412 arg_type_iterator arg_type_begin() const { 1413 return reinterpret_cast<const QualType *>(this+1); 1414 } 1415 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 1416 1417 typedef const QualType *exception_iterator; 1418 exception_iterator exception_begin() const { 1419 // exceptions begin where arguments end 1420 return arg_type_end(); 1421 } 1422 exception_iterator exception_end() const { 1423 return exception_begin() + NumExceptions; 1424 } 1425 1426 virtual void getAsStringInternal(std::string &InnerString, 1427 const PrintingPolicy &Policy) const; 1428 1429 static bool classof(const Type *T) { 1430 return T->getTypeClass() == FunctionProto; 1431 } 1432 static bool classof(const FunctionProtoType *) { return true; } 1433 1434 void Profile(llvm::FoldingSetNodeID &ID); 1435 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 1436 arg_type_iterator ArgTys, unsigned NumArgs, 1437 bool isVariadic, unsigned TypeQuals, 1438 bool hasExceptionSpec, bool anyExceptionSpec, 1439 unsigned NumExceptions, exception_iterator Exs); 1440}; 1441 1442 1443class TypedefType : public Type { 1444 TypedefDecl *Decl; 1445protected: 1446 TypedefType(TypeClass tc, TypedefDecl *D, QualType can) 1447 : Type(tc, can, can->isDependentType()), Decl(D) { 1448 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1449 } 1450 friend class ASTContext; // ASTContext creates these. 1451public: 1452 1453 TypedefDecl *getDecl() const { return Decl; } 1454 1455 /// LookThroughTypedefs - Return the ultimate type this typedef corresponds to 1456 /// potentially looking through *all* consecutive typedefs. This returns the 1457 /// sum of the type qualifiers, so if you have: 1458 /// typedef const int A; 1459 /// typedef volatile A B; 1460 /// looking through the typedefs for B will give you "const volatile A". 1461 QualType LookThroughTypedefs() const; 1462 1463 virtual void getAsStringInternal(std::string &InnerString, 1464 const PrintingPolicy &Policy) const; 1465 1466 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 1467 static bool classof(const TypedefType *) { return true; } 1468}; 1469 1470/// TypeOfExprType (GCC extension). 1471class TypeOfExprType : public Type { 1472 Expr *TOExpr; 1473 TypeOfExprType(Expr *E, QualType can = QualType()); 1474 friend class ASTContext; // ASTContext creates these. 1475public: 1476 Expr *getUnderlyingExpr() const { return TOExpr; } 1477 1478 virtual void getAsStringInternal(std::string &InnerString, 1479 const PrintingPolicy &Policy) const; 1480 1481 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 1482 static bool classof(const TypeOfExprType *) { return true; } 1483}; 1484 1485/// TypeOfType (GCC extension). 1486class TypeOfType : public Type { 1487 QualType TOType; 1488 TypeOfType(QualType T, QualType can) 1489 : Type(TypeOf, can, T->isDependentType()), TOType(T) { 1490 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1491 } 1492 friend class ASTContext; // ASTContext creates these. 1493public: 1494 QualType getUnderlyingType() const { return TOType; } 1495 1496 virtual void getAsStringInternal(std::string &InnerString, 1497 const PrintingPolicy &Policy) const; 1498 1499 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 1500 static bool classof(const TypeOfType *) { return true; } 1501}; 1502 1503/// DecltypeType (C++0x) 1504class DecltypeType : public Type { 1505 Expr *E; 1506 1507 // FIXME: We could get rid of UnderlyingType if we wanted to: We would have to 1508 // Move getDesugaredType to ASTContext so that it can call getDecltypeForExpr 1509 // from it. 1510 QualType UnderlyingType; 1511 1512 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 1513 friend class ASTContext; // ASTContext creates these. 1514public: 1515 Expr *getUnderlyingExpr() const { return E; } 1516 QualType getUnderlyingType() const { return UnderlyingType; } 1517 1518 virtual void getAsStringInternal(std::string &InnerString, 1519 const PrintingPolicy &Policy) const; 1520 1521 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 1522 static bool classof(const DecltypeType *) { return true; } 1523}; 1524 1525class TagType : public Type { 1526 /// Stores the TagDecl associated with this type. The decl will 1527 /// point to the TagDecl that actually defines the entity (or is a 1528 /// definition in progress), if there is such a definition. The 1529 /// single-bit value will be non-zero when this tag is in the 1530 /// process of being defined. 1531 mutable llvm::PointerIntPair<TagDecl *, 1> decl; 1532 friend class ASTContext; 1533 friend class TagDecl; 1534 1535protected: 1536 TagType(TypeClass TC, TagDecl *D, QualType can); 1537 1538public: 1539 TagDecl *getDecl() const { return decl.getPointer(); } 1540 1541 /// @brief Determines whether this type is in the process of being 1542 /// defined. 1543 bool isBeingDefined() const { return decl.getInt(); } 1544 void setBeingDefined(bool Def) { decl.setInt(Def? 1 : 0); } 1545 1546 virtual void getAsStringInternal(std::string &InnerString, 1547 const PrintingPolicy &Policy) const; 1548 1549 static bool classof(const Type *T) { 1550 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 1551 } 1552 static bool classof(const TagType *) { return true; } 1553 static bool classof(const RecordType *) { return true; } 1554 static bool classof(const EnumType *) { return true; } 1555}; 1556 1557/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 1558/// to detect TagType objects of structs/unions/classes. 1559class RecordType : public TagType { 1560protected: 1561 explicit RecordType(RecordDecl *D) 1562 : TagType(Record, reinterpret_cast<TagDecl*>(D), QualType()) { } 1563 explicit RecordType(TypeClass TC, RecordDecl *D) 1564 : TagType(TC, reinterpret_cast<TagDecl*>(D), QualType()) { } 1565 friend class ASTContext; // ASTContext creates these. 1566public: 1567 1568 RecordDecl *getDecl() const { 1569 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 1570 } 1571 1572 // FIXME: This predicate is a helper to QualType/Type. It needs to 1573 // recursively check all fields for const-ness. If any field is declared 1574 // const, it needs to return false. 1575 bool hasConstFields() const { return false; } 1576 1577 // FIXME: RecordType needs to check when it is created that all fields are in 1578 // the same address space, and return that. 1579 unsigned getAddressSpace() const { return 0; } 1580 1581 static bool classof(const TagType *T); 1582 static bool classof(const Type *T) { 1583 return isa<TagType>(T) && classof(cast<TagType>(T)); 1584 } 1585 static bool classof(const RecordType *) { return true; } 1586}; 1587 1588/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 1589/// to detect TagType objects of enums. 1590class EnumType : public TagType { 1591 explicit EnumType(EnumDecl *D) 1592 : TagType(Enum, reinterpret_cast<TagDecl*>(D), QualType()) { } 1593 friend class ASTContext; // ASTContext creates these. 1594public: 1595 1596 EnumDecl *getDecl() const { 1597 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 1598 } 1599 1600 static bool classof(const TagType *T); 1601 static bool classof(const Type *T) { 1602 return isa<TagType>(T) && classof(cast<TagType>(T)); 1603 } 1604 static bool classof(const EnumType *) { return true; } 1605}; 1606 1607class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 1608 unsigned Depth : 15; 1609 unsigned Index : 16; 1610 unsigned ParameterPack : 1; 1611 IdentifierInfo *Name; 1612 1613 TemplateTypeParmType(unsigned D, unsigned I, bool PP, IdentifierInfo *N, 1614 QualType Canon) 1615 : Type(TemplateTypeParm, Canon, /*Dependent=*/true), 1616 Depth(D), Index(I), ParameterPack(PP), Name(N) { } 1617 1618 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 1619 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true), 1620 Depth(D), Index(I), ParameterPack(PP), Name(0) { } 1621 1622 friend class ASTContext; // ASTContext creates these 1623 1624public: 1625 unsigned getDepth() const { return Depth; } 1626 unsigned getIndex() const { return Index; } 1627 bool isParameterPack() const { return ParameterPack; } 1628 IdentifierInfo *getName() const { return Name; } 1629 1630 virtual void getAsStringInternal(std::string &InnerString, 1631 const PrintingPolicy &Policy) const; 1632 1633 void Profile(llvm::FoldingSetNodeID &ID) { 1634 Profile(ID, Depth, Index, ParameterPack, Name); 1635 } 1636 1637 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 1638 unsigned Index, bool ParameterPack, 1639 IdentifierInfo *Name) { 1640 ID.AddInteger(Depth); 1641 ID.AddInteger(Index); 1642 ID.AddBoolean(ParameterPack); 1643 ID.AddPointer(Name); 1644 } 1645 1646 static bool classof(const Type *T) { 1647 return T->getTypeClass() == TemplateTypeParm; 1648 } 1649 static bool classof(const TemplateTypeParmType *T) { return true; } 1650}; 1651 1652/// \brief Represents the type of a template specialization as written 1653/// in the source code. 1654/// 1655/// Template specialization types represent the syntactic form of a 1656/// template-id that refers to a type, e.g., @c vector<int>. Some 1657/// template specialization types are syntactic sugar, whose canonical 1658/// type will point to some other type node that represents the 1659/// instantiation or class template specialization. For example, a 1660/// class template specialization type of @c vector<int> will refer to 1661/// a tag type for the instantiation 1662/// @c std::vector<int, std::allocator<int>>. 1663/// 1664/// Other template specialization types, for which the template name 1665/// is dependent, may be canonical types. These types are always 1666/// dependent. 1667class TemplateSpecializationType 1668 : public Type, public llvm::FoldingSetNode { 1669 1670 /// \brief The name of the template being specialized. 1671 TemplateName Template; 1672 1673 /// \brief - The number of template arguments named in this class 1674 /// template specialization. 1675 unsigned NumArgs; 1676 1677 TemplateSpecializationType(TemplateName T, 1678 const TemplateArgument *Args, 1679 unsigned NumArgs, QualType Canon); 1680 1681 virtual void Destroy(ASTContext& C); 1682 1683 friend class ASTContext; // ASTContext creates these 1684 1685public: 1686 /// \brief Determine whether any of the given template arguments are 1687 /// dependent. 1688 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 1689 unsigned NumArgs); 1690 1691 /// \brief Print a template argument list, including the '<' and '>' 1692 /// enclosing the template arguments. 1693 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 1694 unsigned NumArgs, 1695 const PrintingPolicy &Policy); 1696 1697 typedef const TemplateArgument * iterator; 1698 1699 iterator begin() const { return getArgs(); } 1700 iterator end() const; 1701 1702 /// \brief Retrieve the name of the template that we are specializing. 1703 TemplateName getTemplateName() const { return Template; } 1704 1705 /// \brief Retrieve the template arguments. 1706 const TemplateArgument *getArgs() const { 1707 return reinterpret_cast<const TemplateArgument *>(this + 1); 1708 } 1709 1710 /// \brief Retrieve the number of template arguments. 1711 unsigned getNumArgs() const { return NumArgs; } 1712 1713 /// \brief Retrieve a specific template argument as a type. 1714 /// \precondition @c isArgType(Arg) 1715 const TemplateArgument &getArg(unsigned Idx) const; 1716 1717 virtual void getAsStringInternal(std::string &InnerString, 1718 const PrintingPolicy &Policy) const; 1719 1720 void Profile(llvm::FoldingSetNodeID &ID) { 1721 Profile(ID, Template, getArgs(), NumArgs); 1722 } 1723 1724 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 1725 const TemplateArgument *Args, unsigned NumArgs); 1726 1727 static bool classof(const Type *T) { 1728 return T->getTypeClass() == TemplateSpecialization; 1729 } 1730 static bool classof(const TemplateSpecializationType *T) { return true; } 1731}; 1732 1733/// \brief Represents a type that was referred to via a qualified 1734/// name, e.g., N::M::type. 1735/// 1736/// This type is used to keep track of a type name as written in the 1737/// source code, including any nested-name-specifiers. The type itself 1738/// is always "sugar", used to express what was written in the source 1739/// code but containing no additional semantic information. 1740class QualifiedNameType : public Type, public llvm::FoldingSetNode { 1741 /// \brief The nested name specifier containing the qualifier. 1742 NestedNameSpecifier *NNS; 1743 1744 /// \brief The type that this qualified name refers to. 1745 QualType NamedType; 1746 1747 QualifiedNameType(NestedNameSpecifier *NNS, QualType NamedType, 1748 QualType CanonType) 1749 : Type(QualifiedName, CanonType, NamedType->isDependentType()), 1750 NNS(NNS), NamedType(NamedType) { } 1751 1752 friend class ASTContext; // ASTContext creates these 1753 1754public: 1755 /// \brief Retrieve the qualification on this type. 1756 NestedNameSpecifier *getQualifier() const { return NNS; } 1757 1758 /// \brief Retrieve the type named by the qualified-id. 1759 QualType getNamedType() const { return NamedType; } 1760 1761 virtual void getAsStringInternal(std::string &InnerString, 1762 const PrintingPolicy &Policy) const; 1763 1764 void Profile(llvm::FoldingSetNodeID &ID) { 1765 Profile(ID, NNS, NamedType); 1766 } 1767 1768 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 1769 QualType NamedType) { 1770 ID.AddPointer(NNS); 1771 NamedType.Profile(ID); 1772 } 1773 1774 static bool classof(const Type *T) { 1775 return T->getTypeClass() == QualifiedName; 1776 } 1777 static bool classof(const QualifiedNameType *T) { return true; } 1778}; 1779 1780/// \brief Represents a 'typename' specifier that names a type within 1781/// a dependent type, e.g., "typename T::type". 1782/// 1783/// TypenameType has a very similar structure to QualifiedNameType, 1784/// which also involves a nested-name-specifier following by a type, 1785/// and (FIXME!) both can even be prefixed by the 'typename' 1786/// keyword. However, the two types serve very different roles: 1787/// QualifiedNameType is a non-semantic type that serves only as sugar 1788/// to show how a particular type was written in the source 1789/// code. TypenameType, on the other hand, only occurs when the 1790/// nested-name-specifier is dependent, such that we cannot resolve 1791/// the actual type until after instantiation. 1792class TypenameType : public Type, public llvm::FoldingSetNode { 1793 /// \brief The nested name specifier containing the qualifier. 1794 NestedNameSpecifier *NNS; 1795 1796 typedef llvm::PointerUnion<const IdentifierInfo *, 1797 const TemplateSpecializationType *> NameType; 1798 1799 /// \brief The type that this typename specifier refers to. 1800 NameType Name; 1801 1802 TypenameType(NestedNameSpecifier *NNS, const IdentifierInfo *Name, 1803 QualType CanonType) 1804 : Type(Typename, CanonType, true), NNS(NNS), Name(Name) { 1805 assert(NNS->isDependent() && 1806 "TypenameType requires a dependent nested-name-specifier"); 1807 } 1808 1809 TypenameType(NestedNameSpecifier *NNS, const TemplateSpecializationType *Ty, 1810 QualType CanonType) 1811 : Type(Typename, CanonType, true), NNS(NNS), Name(Ty) { 1812 assert(NNS->isDependent() && 1813 "TypenameType requires a dependent nested-name-specifier"); 1814 } 1815 1816 friend class ASTContext; // ASTContext creates these 1817 1818public: 1819 /// \brief Retrieve the qualification on this type. 1820 NestedNameSpecifier *getQualifier() const { return NNS; } 1821 1822 /// \brief Retrieve the type named by the typename specifier as an 1823 /// identifier. 1824 /// 1825 /// This routine will return a non-NULL identifier pointer when the 1826 /// form of the original typename was terminated by an identifier, 1827 /// e.g., "typename T::type". 1828 const IdentifierInfo *getIdentifier() const { 1829 return Name.dyn_cast<const IdentifierInfo *>(); 1830 } 1831 1832 /// \brief Retrieve the type named by the typename specifier as a 1833 /// type specialization. 1834 const TemplateSpecializationType *getTemplateId() const { 1835 return Name.dyn_cast<const TemplateSpecializationType *>(); 1836 } 1837 1838 virtual void getAsStringInternal(std::string &InnerString, 1839 const PrintingPolicy &Policy) const; 1840 1841 void Profile(llvm::FoldingSetNodeID &ID) { 1842 Profile(ID, NNS, Name); 1843 } 1844 1845 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 1846 NameType Name) { 1847 ID.AddPointer(NNS); 1848 ID.AddPointer(Name.getOpaqueValue()); 1849 } 1850 1851 static bool classof(const Type *T) { 1852 return T->getTypeClass() == Typename; 1853 } 1854 static bool classof(const TypenameType *T) { return true; } 1855}; 1856 1857/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 1858/// object oriented design. They basically correspond to C++ classes. There 1859/// are two kinds of interface types, normal interfaces like "NSString" and 1860/// qualified interfaces, which are qualified with a protocol list like 1861/// "NSString<NSCopyable, NSAmazing>". Qualified interface types are instances 1862/// of ObjCQualifiedInterfaceType, which is a subclass of ObjCInterfaceType. 1863class ObjCInterfaceType : public Type { 1864 ObjCInterfaceDecl *Decl; 1865protected: 1866 ObjCInterfaceType(TypeClass tc, ObjCInterfaceDecl *D) : 1867 Type(tc, QualType(), /*Dependent=*/false), Decl(D) { } 1868 friend class ASTContext; // ASTContext creates these. 1869 1870 // FIXME: These can go away when we move ASTContext::canAssignObjCInterfaces 1871 // to this class (as a static helper). 1872 bool isObjCIdInterface() const; 1873 bool isObjCClassInterface() const; 1874public: 1875 1876 ObjCInterfaceDecl *getDecl() const { return Decl; } 1877 1878 /// qual_iterator and friends: this provides access to the (potentially empty) 1879 /// list of protocols qualifying this interface. If this is an instance of 1880 /// ObjCQualifiedInterfaceType it returns the list, otherwise it returns an 1881 /// empty list if there are no qualifying protocols. 1882 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 1883 inline qual_iterator qual_begin() const; 1884 inline qual_iterator qual_end() const; 1885 bool qual_empty() const { return getTypeClass() != ObjCQualifiedInterface; } 1886 1887 /// getNumProtocols - Return the number of qualifying protocols in this 1888 /// interface type, or 0 if there are none. 1889 inline unsigned getNumProtocols() const; 1890 1891 virtual void getAsStringInternal(std::string &InnerString, 1892 const PrintingPolicy &Policy) const; 1893 static bool classof(const Type *T) { 1894 return T->getTypeClass() == ObjCInterface || 1895 T->getTypeClass() == ObjCQualifiedInterface; 1896 } 1897 static bool classof(const ObjCInterfaceType *) { return true; } 1898}; 1899 1900/// ObjCObjectPointerType - Used to represent 'id', 'Interface *', 'id <p>', 1901/// and 'Interface <p> *'. 1902/// 1903/// Duplicate protocols are removed and protocol list is canonicalized to be in 1904/// alphabetical order. 1905class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 1906 QualType PointeeType; // A builtin or interface type. 1907 1908 // List of protocols for this protocol conforming object type 1909 // List is sorted on protocol name. No protocol is entered more than once. 1910 llvm::SmallVector<ObjCProtocolDecl*, 8> Protocols; 1911 1912 ObjCObjectPointerType(QualType T, ObjCProtocolDecl **Protos, unsigned NumP) : 1913 Type(ObjCObjectPointer, QualType(), /*Dependent=*/false), 1914 PointeeType(T), Protocols(Protos, Protos+NumP) { } 1915 friend class ASTContext; // ASTContext creates these. 1916 1917public: 1918 // Get the pointee type. Pointee will either be: 1919 // - a built-in type (for 'id' and 'Class'). 1920 // - an interface type (for user-defined types). 1921 // - a TypedefType whose canonical type is an interface (as in 'T' below). 1922 // For example: typedef NSObject T; T *var; 1923 QualType getPointeeType() const { return PointeeType; } 1924 1925 const ObjCInterfaceType *getInterfaceType() const { 1926 return PointeeType->getAsObjCInterfaceType(); 1927 } 1928 /// getInterfaceDecl - returns an interface decl for user-defined types. 1929 ObjCInterfaceDecl *getInterfaceDecl() const { 1930 return getInterfaceType() ? getInterfaceType()->getDecl() : 0; 1931 } 1932 /// isObjCIdType - true for "id". 1933 bool isObjCIdType() const { 1934 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCId) && 1935 !Protocols.size(); 1936 } 1937 /// isObjCClassType - true for "Class". 1938 bool isObjCClassType() const { 1939 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCClass) && 1940 !Protocols.size(); 1941 } 1942 /// isObjCQualifiedIdType - true for "id <p>". 1943 bool isObjCQualifiedIdType() const { 1944 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCId) && 1945 Protocols.size(); 1946 } 1947 /// isObjCQualifiedClassType - true for "Class <p>". 1948 bool isQualifiedClassType() const { 1949 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCClass) && 1950 Protocols.size(); 1951 } 1952 /// qual_iterator and friends: this provides access to the (potentially empty) 1953 /// list of protocols qualifying this interface. 1954 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 1955 1956 qual_iterator qual_begin() const { return Protocols.begin(); } 1957 qual_iterator qual_end() const { return Protocols.end(); } 1958 bool qual_empty() const { return Protocols.size() == 0; } 1959 1960 /// getNumProtocols - Return the number of qualifying protocols in this 1961 /// interface type, or 0 if there are none. 1962 unsigned getNumProtocols() const { return Protocols.size(); } 1963 1964 void Profile(llvm::FoldingSetNodeID &ID); 1965 static void Profile(llvm::FoldingSetNodeID &ID, QualType T, 1966 ObjCProtocolDecl **protocols, unsigned NumProtocols); 1967 virtual void getAsStringInternal(std::string &InnerString, 1968 const PrintingPolicy &Policy) const; 1969 static bool classof(const Type *T) { 1970 return T->getTypeClass() == ObjCObjectPointer; 1971 } 1972 static bool classof(const ObjCObjectPointerType *) { return true; } 1973}; 1974 1975/// ObjCQualifiedInterfaceType - This class represents interface types 1976/// conforming to a list of protocols, such as INTF<Proto1, Proto2, Proto1>. 1977/// 1978/// Duplicate protocols are removed and protocol list is canonicalized to be in 1979/// alphabetical order. 1980/// FIXME: Remove this class (converting uses to ObjCObjectPointerType). 1981class ObjCQualifiedInterfaceType : public ObjCInterfaceType, 1982 public llvm::FoldingSetNode { 1983 1984 // List of protocols for this protocol conforming object type 1985 // List is sorted on protocol name. No protocol is enterred more than once. 1986 llvm::SmallVector<ObjCProtocolDecl*, 4> Protocols; 1987 1988 ObjCQualifiedInterfaceType(ObjCInterfaceDecl *D, 1989 ObjCProtocolDecl **Protos, unsigned NumP) : 1990 ObjCInterfaceType(ObjCQualifiedInterface, D), 1991 Protocols(Protos, Protos+NumP) { } 1992 friend class ASTContext; // ASTContext creates these. 1993public: 1994 1995 unsigned getNumProtocols() const { 1996 return Protocols.size(); 1997 } 1998 1999 qual_iterator qual_begin() const { return Protocols.begin(); } 2000 qual_iterator qual_end() const { return Protocols.end(); } 2001 2002 virtual void getAsStringInternal(std::string &InnerString, 2003 const PrintingPolicy &Policy) const; 2004 2005 void Profile(llvm::FoldingSetNodeID &ID); 2006 static void Profile(llvm::FoldingSetNodeID &ID, 2007 const ObjCInterfaceDecl *Decl, 2008 ObjCProtocolDecl **protocols, unsigned NumProtocols); 2009 2010 static bool classof(const Type *T) { 2011 return T->getTypeClass() == ObjCQualifiedInterface; 2012 } 2013 static bool classof(const ObjCQualifiedInterfaceType *) { return true; } 2014}; 2015 2016inline ObjCInterfaceType::qual_iterator ObjCInterfaceType::qual_begin() const { 2017 if (const ObjCQualifiedInterfaceType *QIT = 2018 dyn_cast<ObjCQualifiedInterfaceType>(this)) 2019 return QIT->qual_begin(); 2020 return 0; 2021} 2022inline ObjCInterfaceType::qual_iterator ObjCInterfaceType::qual_end() const { 2023 if (const ObjCQualifiedInterfaceType *QIT = 2024 dyn_cast<ObjCQualifiedInterfaceType>(this)) 2025 return QIT->qual_end(); 2026 return 0; 2027} 2028 2029/// getNumProtocols - Return the number of qualifying protocols in this 2030/// interface type, or 0 if there are none. 2031inline unsigned ObjCInterfaceType::getNumProtocols() const { 2032 if (const ObjCQualifiedInterfaceType *QIT = 2033 dyn_cast<ObjCQualifiedInterfaceType>(this)) 2034 return QIT->getNumProtocols(); 2035 return 0; 2036} 2037 2038// Inline function definitions. 2039 2040/// getUnqualifiedType - Return the type without any qualifiers. 2041inline QualType QualType::getUnqualifiedType() const { 2042 Type *TP = getTypePtr(); 2043 if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(TP)) 2044 TP = EXTQT->getBaseType(); 2045 return QualType(TP, 0); 2046} 2047 2048/// getAddressSpace - Return the address space of this type. 2049inline unsigned QualType::getAddressSpace() const { 2050 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2051 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 2052 return AT->getElementType().getAddressSpace(); 2053 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 2054 return RT->getAddressSpace(); 2055 if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(CT)) 2056 return EXTQT->getAddressSpace(); 2057 return 0; 2058} 2059 2060/// getObjCGCAttr - Return the gc attribute of this type. 2061inline QualType::GCAttrTypes QualType::getObjCGCAttr() const { 2062 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2063 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 2064 return AT->getElementType().getObjCGCAttr(); 2065 if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(CT)) 2066 return EXTQT->getObjCGCAttr(); 2067 if (const ObjCObjectPointerType *PT = CT->getAsObjCObjectPointerType()) 2068 return PT->getPointeeType().getObjCGCAttr(); 2069 return GCNone; 2070} 2071 2072/// isMoreQualifiedThan - Determine whether this type is more 2073/// qualified than the Other type. For example, "const volatile int" 2074/// is more qualified than "const int", "volatile int", and 2075/// "int". However, it is not more qualified than "const volatile 2076/// int". 2077inline bool QualType::isMoreQualifiedThan(QualType Other) const { 2078 unsigned MyQuals = this->getCVRQualifiers(); 2079 unsigned OtherQuals = Other.getCVRQualifiers(); 2080 if (getAddressSpace() != Other.getAddressSpace()) 2081 return false; 2082 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 2083} 2084 2085/// isAtLeastAsQualifiedAs - Determine whether this type is at last 2086/// as qualified as the Other type. For example, "const volatile 2087/// int" is at least as qualified as "const int", "volatile int", 2088/// "int", and "const volatile int". 2089inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 2090 unsigned MyQuals = this->getCVRQualifiers(); 2091 unsigned OtherQuals = Other.getCVRQualifiers(); 2092 if (getAddressSpace() != Other.getAddressSpace()) 2093 return false; 2094 return (MyQuals | OtherQuals) == MyQuals; 2095} 2096 2097/// getNonReferenceType - If Type is a reference type (e.g., const 2098/// int&), returns the type that the reference refers to ("const 2099/// int"). Otherwise, returns the type itself. This routine is used 2100/// throughout Sema to implement C++ 5p6: 2101/// 2102/// If an expression initially has the type "reference to T" (8.3.2, 2103/// 8.5.3), the type is adjusted to "T" prior to any further 2104/// analysis, the expression designates the object or function 2105/// denoted by the reference, and the expression is an lvalue. 2106inline QualType QualType::getNonReferenceType() const { 2107 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 2108 return RefType->getPointeeType(); 2109 else 2110 return *this; 2111} 2112 2113inline const TypedefType* Type::getAsTypedefType() const { 2114 return dyn_cast<TypedefType>(this); 2115} 2116inline const ObjCInterfaceType *Type::getAsPointerToObjCInterfaceType() const { 2117 if (const PointerType *PT = getAs<PointerType>()) 2118 return PT->getPointeeType()->getAsObjCInterfaceType(); 2119 return 0; 2120} 2121 2122// NOTE: All of these methods use "getUnqualifiedType" to strip off address 2123// space qualifiers if present. 2124inline bool Type::isFunctionType() const { 2125 return isa<FunctionType>(CanonicalType.getUnqualifiedType()); 2126} 2127inline bool Type::isPointerType() const { 2128 return isa<PointerType>(CanonicalType.getUnqualifiedType()); 2129} 2130inline bool Type::isAnyPointerType() const { 2131 return isPointerType() || isObjCObjectPointerType(); 2132} 2133inline bool Type::isBlockPointerType() const { 2134 return isa<BlockPointerType>(CanonicalType.getUnqualifiedType()); 2135} 2136inline bool Type::isReferenceType() const { 2137 return isa<ReferenceType>(CanonicalType.getUnqualifiedType()); 2138} 2139inline bool Type::isLValueReferenceType() const { 2140 return isa<LValueReferenceType>(CanonicalType.getUnqualifiedType()); 2141} 2142inline bool Type::isRValueReferenceType() const { 2143 return isa<RValueReferenceType>(CanonicalType.getUnqualifiedType()); 2144} 2145inline bool Type::isFunctionPointerType() const { 2146 if (const PointerType* T = getAs<PointerType>()) 2147 return T->getPointeeType()->isFunctionType(); 2148 else 2149 return false; 2150} 2151inline bool Type::isMemberPointerType() const { 2152 return isa<MemberPointerType>(CanonicalType.getUnqualifiedType()); 2153} 2154inline bool Type::isMemberFunctionPointerType() const { 2155 if (const MemberPointerType* T = getAsMemberPointerType()) 2156 return T->getPointeeType()->isFunctionType(); 2157 else 2158 return false; 2159} 2160inline bool Type::isArrayType() const { 2161 return isa<ArrayType>(CanonicalType.getUnqualifiedType()); 2162} 2163inline bool Type::isConstantArrayType() const { 2164 return isa<ConstantArrayType>(CanonicalType.getUnqualifiedType()); 2165} 2166inline bool Type::isIncompleteArrayType() const { 2167 return isa<IncompleteArrayType>(CanonicalType.getUnqualifiedType()); 2168} 2169inline bool Type::isVariableArrayType() const { 2170 return isa<VariableArrayType>(CanonicalType.getUnqualifiedType()); 2171} 2172inline bool Type::isDependentSizedArrayType() const { 2173 return isa<DependentSizedArrayType>(CanonicalType.getUnqualifiedType()); 2174} 2175inline bool Type::isRecordType() const { 2176 return isa<RecordType>(CanonicalType.getUnqualifiedType()); 2177} 2178inline bool Type::isAnyComplexType() const { 2179 return isa<ComplexType>(CanonicalType.getUnqualifiedType()); 2180} 2181inline bool Type::isVectorType() const { 2182 return isa<VectorType>(CanonicalType.getUnqualifiedType()); 2183} 2184inline bool Type::isExtVectorType() const { 2185 return isa<ExtVectorType>(CanonicalType.getUnqualifiedType()); 2186} 2187inline bool Type::isObjCObjectPointerType() const { 2188 return isa<ObjCObjectPointerType>(CanonicalType.getUnqualifiedType()); 2189} 2190inline bool Type::isObjCInterfaceType() const { 2191 return isa<ObjCInterfaceType>(CanonicalType.getUnqualifiedType()); 2192} 2193inline bool Type::isObjCQualifiedInterfaceType() const { 2194 return isa<ObjCQualifiedInterfaceType>(CanonicalType.getUnqualifiedType()); 2195} 2196inline bool Type::isObjCQualifiedIdType() const { 2197 if (const ObjCObjectPointerType *OPT = getAsObjCObjectPointerType()) 2198 return OPT->isObjCQualifiedIdType(); 2199 return false; 2200} 2201inline bool Type::isObjCIdType() const { 2202 if (const ObjCObjectPointerType *OPT = getAsObjCObjectPointerType()) 2203 return OPT->isObjCIdType(); 2204 return false; 2205} 2206inline bool Type::isObjCClassType() const { 2207 if (const ObjCObjectPointerType *OPT = getAsObjCObjectPointerType()) 2208 return OPT->isObjCClassType(); 2209 return false; 2210} 2211inline bool Type::isObjCBuiltinType() const { 2212 return isObjCIdType() || isObjCClassType(); 2213} 2214 2215inline bool Type::isTemplateTypeParmType() const { 2216 return isa<TemplateTypeParmType>(CanonicalType.getUnqualifiedType()); 2217} 2218 2219inline bool Type::isSpecificBuiltinType(unsigned K) const { 2220 if (const BuiltinType *BT = getAsBuiltinType()) 2221 if (BT->getKind() == (BuiltinType::Kind) K) 2222 return true; 2223 return false; 2224} 2225 2226/// \brief Determines whether this is a type for which one can define 2227/// an overloaded operator. 2228inline bool Type::isOverloadableType() const { 2229 return isDependentType() || isRecordType() || isEnumeralType(); 2230} 2231 2232inline bool Type::hasPointerRepresentation() const { 2233 return (isPointerType() || isReferenceType() || isBlockPointerType() || 2234 isObjCInterfaceType() || isObjCObjectPointerType() || 2235 isObjCQualifiedInterfaceType() || isNullPtrType()); 2236} 2237 2238inline bool Type::hasObjCPointerRepresentation() const { 2239 return (isObjCInterfaceType() || isObjCObjectPointerType() || 2240 isObjCQualifiedInterfaceType()); 2241} 2242 2243/// Insertion operator for diagnostics. This allows sending QualType's into a 2244/// diagnostic with <<. 2245inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 2246 QualType T) { 2247 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 2248 Diagnostic::ak_qualtype); 2249 return DB; 2250} 2251 2252/// Member-template getAs<specific type>'. 2253template <typename T> const T *Type::getAs() const { 2254 // If this is directly a T type, return it. 2255 if (const T *Ty = dyn_cast<T>(this)) 2256 return Ty; 2257 2258 // If the canonical form of this type isn't the right kind, reject it. 2259 if (!isa<T>(CanonicalType)) { 2260 // Look through type qualifiers 2261 if (isa<T>(CanonicalType.getUnqualifiedType())) 2262 return CanonicalType.getUnqualifiedType()->getAs<T>(); 2263 return 0; 2264 } 2265 2266 // If this is a typedef for a pointer type, strip the typedef off without 2267 // losing all typedef information. 2268 return cast<T>(getDesugaredType()); 2269} 2270 2271} // end namespace clang 2272 2273#endif 2274