Type.h revision c15cb2af27514ecc879daba9aa01389c5203685d
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 PointerType *getAsPointerType() const; 435 const BlockPointerType *getAsBlockPointerType() const; 436 const ReferenceType *getAsReferenceType() const; 437 const LValueReferenceType *getAsLValueReferenceType() const; 438 const RValueReferenceType *getAsRValueReferenceType() const; 439 const MemberPointerType *getAsMemberPointerType() const; 440 const TagType *getAsTagType() const; 441 const RecordType *getAsRecordType() const; 442 const RecordType *getAsStructureType() const; 443 /// NOTE: getAs*ArrayType are methods on ASTContext. 444 const TypedefType *getAsTypedefType() const; 445 const RecordType *getAsUnionType() const; 446 const EnumType *getAsEnumType() const; 447 const VectorType *getAsVectorType() const; // GCC vector type. 448 const ComplexType *getAsComplexType() const; 449 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 450 const ExtVectorType *getAsExtVectorType() const; // Extended vector type. 451 const ObjCObjectPointerType *getAsObjCObjectPointerType() const; 452 // The following is a convenience method that returns an ObjCObjectPointerType 453 // for object declared using an interface. 454 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 455 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 456 const ObjCInterfaceType *getAsObjCInterfaceType() const; 457 const ObjCInterfaceType *getAsObjCQualifiedInterfaceType() const; 458 const TemplateTypeParmType *getAsTemplateTypeParmType() const; 459 460 // Member-template getAs<specific type>'. This scheme will eventually 461 // replace the specific getAsXXXX methods above. 462 template <typename T> const T *getAs() const; 463 464 const TemplateSpecializationType * 465 getAsTemplateSpecializationType() const; 466 467 /// getAsPointerToObjCInterfaceType - If this is a pointer to an ObjC 468 /// interface, return the interface type, otherwise return null. 469 const ObjCInterfaceType *getAsPointerToObjCInterfaceType() const; 470 471 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 472 /// element type of the array, potentially with type qualifiers missing. 473 /// This method should never be used when type qualifiers are meaningful. 474 const Type *getArrayElementTypeNoTypeQual() const; 475 476 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 477 /// pointer, this returns the respective pointee. 478 QualType getPointeeType() const; 479 480 /// getDesugaredType - Return the specified type with any "sugar" removed from 481 /// the type. This takes off typedefs, typeof's etc. If the outer level of 482 /// the type is already concrete, it returns it unmodified. This is similar 483 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 484 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 485 /// concrete. 486 QualType getDesugaredType(bool ForDisplay = false) const; 487 488 /// More type predicates useful for type checking/promotion 489 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 490 491 /// isSignedIntegerType - Return true if this is an integer type that is 492 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 493 /// an enum decl which has a signed representation, or a vector of signed 494 /// integer element type. 495 bool isSignedIntegerType() const; 496 497 /// isUnsignedIntegerType - Return true if this is an integer type that is 498 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 499 /// decl which has an unsigned representation, or a vector of unsigned integer 500 /// element type. 501 bool isUnsignedIntegerType() const; 502 503 /// isConstantSizeType - Return true if this is not a variable sized type, 504 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 505 /// incomplete types. 506 bool isConstantSizeType() const; 507 508 /// isSpecifierType - Returns true if this type can be represented by some 509 /// set of type specifiers. 510 bool isSpecifierType() const; 511 512 QualType getCanonicalTypeInternal() const { return CanonicalType; } 513 void dump() const; 514 virtual void getAsStringInternal(std::string &InnerString, 515 const PrintingPolicy &Policy) const = 0; 516 static bool classof(const Type *) { return true; } 517}; 518 519/// ExtQualType - TR18037 (C embedded extensions) 6.2.5p26 520/// This supports all kinds of type attributes; including, 521/// address space qualified types, objective-c's __weak and 522/// __strong attributes. 523/// 524class ExtQualType : public Type, public llvm::FoldingSetNode { 525 /// BaseType - This is the underlying type that this qualifies. All CVR 526 /// qualifiers are stored on the QualType that references this type, so we 527 /// can't have any here. 528 Type *BaseType; 529 530 /// Address Space ID - The address space ID this type is qualified with. 531 unsigned AddressSpace; 532 /// GC __weak/__strong attributes 533 QualType::GCAttrTypes GCAttrType; 534 535 ExtQualType(Type *Base, QualType CanonicalPtr, unsigned AddrSpace, 536 QualType::GCAttrTypes gcAttr) : 537 Type(ExtQual, CanonicalPtr, Base->isDependentType()), BaseType(Base), 538 AddressSpace(AddrSpace), GCAttrType(gcAttr) { 539 assert(!isa<ExtQualType>(BaseType) && 540 "Cannot have ExtQualType of ExtQualType"); 541 } 542 friend class ASTContext; // ASTContext creates these. 543public: 544 Type *getBaseType() const { return BaseType; } 545 QualType::GCAttrTypes getObjCGCAttr() const { return GCAttrType; } 546 unsigned getAddressSpace() const { return AddressSpace; } 547 548 virtual void getAsStringInternal(std::string &InnerString, 549 const PrintingPolicy &Policy) const; 550 551 void Profile(llvm::FoldingSetNodeID &ID) { 552 Profile(ID, getBaseType(), AddressSpace, GCAttrType); 553 } 554 static void Profile(llvm::FoldingSetNodeID &ID, Type *Base, 555 unsigned AddrSpace, QualType::GCAttrTypes gcAttr) { 556 ID.AddPointer(Base); 557 ID.AddInteger(AddrSpace); 558 ID.AddInteger(gcAttr); 559 } 560 561 static bool classof(const Type *T) { return T->getTypeClass() == ExtQual; } 562 static bool classof(const ExtQualType *) { return true; } 563}; 564 565 566/// BuiltinType - This class is used for builtin types like 'int'. Builtin 567/// types are always canonical and have a literal name field. 568class BuiltinType : public Type { 569public: 570 enum Kind { 571 Void, 572 573 Bool, // This is bool and/or _Bool. 574 Char_U, // This is 'char' for targets where char is unsigned. 575 UChar, // This is explicitly qualified unsigned char. 576 Char16, // This is 'char16_t' for C++. 577 Char32, // This is 'char32_t' for C++. 578 UShort, 579 UInt, 580 ULong, 581 ULongLong, 582 UInt128, // __uint128_t 583 584 Char_S, // This is 'char' for targets where char is signed. 585 SChar, // This is explicitly qualified signed char. 586 WChar, // This is 'wchar_t' for C++. 587 Short, 588 Int, 589 Long, 590 LongLong, 591 Int128, // __int128_t 592 593 Float, Double, LongDouble, 594 595 NullPtr, // This is the type of C++0x 'nullptr'. 596 597 Overload, // This represents the type of an overloaded function declaration. 598 Dependent, // This represents the type of a type-dependent expression. 599 600 UndeducedAuto, // In C++0x, this represents the type of an auto variable 601 // that has not been deduced yet. 602 ObjCId, // This represents the ObjC 'id' type. 603 ObjCClass // This represents the ObjC 'Class' type. 604 }; 605private: 606 Kind TypeKind; 607public: 608 BuiltinType(Kind K) 609 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent)), 610 TypeKind(K) {} 611 612 Kind getKind() const { return TypeKind; } 613 const char *getName(const LangOptions &LO) const; 614 615 virtual void getAsStringInternal(std::string &InnerString, 616 const PrintingPolicy &Policy) const; 617 618 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 619 static bool classof(const BuiltinType *) { return true; } 620}; 621 622/// FixedWidthIntType - Used for arbitrary width types that we either don't 623/// want to or can't map to named integer types. These always have a lower 624/// integer rank than builtin types of the same width. 625class FixedWidthIntType : public Type { 626private: 627 unsigned Width; 628 bool Signed; 629public: 630 FixedWidthIntType(unsigned W, bool S) : Type(FixedWidthInt, QualType(), false), 631 Width(W), Signed(S) {} 632 633 unsigned getWidth() const { return Width; } 634 bool isSigned() const { return Signed; } 635 const char *getName() const; 636 637 virtual void getAsStringInternal(std::string &InnerString, 638 const PrintingPolicy &Policy) const; 639 640 static bool classof(const Type *T) { return T->getTypeClass() == FixedWidthInt; } 641 static bool classof(const FixedWidthIntType *) { return true; } 642}; 643 644/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 645/// types (_Complex float etc) as well as the GCC integer complex extensions. 646/// 647class ComplexType : public Type, public llvm::FoldingSetNode { 648 QualType ElementType; 649 ComplexType(QualType Element, QualType CanonicalPtr) : 650 Type(Complex, CanonicalPtr, Element->isDependentType()), 651 ElementType(Element) { 652 } 653 friend class ASTContext; // ASTContext creates these. 654public: 655 QualType getElementType() const { return ElementType; } 656 657 virtual void getAsStringInternal(std::string &InnerString, 658 const PrintingPolicy &Policy) const; 659 660 void Profile(llvm::FoldingSetNodeID &ID) { 661 Profile(ID, getElementType()); 662 } 663 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 664 ID.AddPointer(Element.getAsOpaquePtr()); 665 } 666 667 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 668 static bool classof(const ComplexType *) { return true; } 669}; 670 671/// PointerType - C99 6.7.5.1 - Pointer Declarators. 672/// 673class PointerType : public Type, public llvm::FoldingSetNode { 674 QualType PointeeType; 675 676 PointerType(QualType Pointee, QualType CanonicalPtr) : 677 Type(Pointer, CanonicalPtr, Pointee->isDependentType()), PointeeType(Pointee) { 678 } 679 friend class ASTContext; // ASTContext creates these. 680public: 681 682 virtual void getAsStringInternal(std::string &InnerString, 683 const PrintingPolicy &Policy) const; 684 685 QualType getPointeeType() const { return PointeeType; } 686 687 void Profile(llvm::FoldingSetNodeID &ID) { 688 Profile(ID, getPointeeType()); 689 } 690 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 691 ID.AddPointer(Pointee.getAsOpaquePtr()); 692 } 693 694 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 695 static bool classof(const PointerType *) { return true; } 696}; 697 698/// BlockPointerType - pointer to a block type. 699/// This type is to represent types syntactically represented as 700/// "void (^)(int)", etc. Pointee is required to always be a function type. 701/// 702class BlockPointerType : public Type, public llvm::FoldingSetNode { 703 QualType PointeeType; // Block is some kind of pointer type 704 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 705 Type(BlockPointer, CanonicalCls, Pointee->isDependentType()), 706 PointeeType(Pointee) { 707 } 708 friend class ASTContext; // ASTContext creates these. 709public: 710 711 // Get the pointee type. Pointee is required to always be a function type. 712 QualType getPointeeType() const { return PointeeType; } 713 714 virtual void getAsStringInternal(std::string &InnerString, 715 const PrintingPolicy &Policy) const; 716 717 void Profile(llvm::FoldingSetNodeID &ID) { 718 Profile(ID, getPointeeType()); 719 } 720 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 721 ID.AddPointer(Pointee.getAsOpaquePtr()); 722 } 723 724 static bool classof(const Type *T) { 725 return T->getTypeClass() == BlockPointer; 726 } 727 static bool classof(const BlockPointerType *) { return true; } 728}; 729 730/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 731/// 732class ReferenceType : public Type, public llvm::FoldingSetNode { 733 QualType PointeeType; 734 735protected: 736 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef) : 737 Type(tc, CanonicalRef, Referencee->isDependentType()), 738 PointeeType(Referencee) { 739 } 740public: 741 QualType getPointeeType() const { return PointeeType; } 742 743 void Profile(llvm::FoldingSetNodeID &ID) { 744 Profile(ID, getPointeeType()); 745 } 746 static void Profile(llvm::FoldingSetNodeID &ID, QualType Referencee) { 747 ID.AddPointer(Referencee.getAsOpaquePtr()); 748 } 749 750 static bool classof(const Type *T) { 751 return T->getTypeClass() == LValueReference || 752 T->getTypeClass() == RValueReference; 753 } 754 static bool classof(const ReferenceType *) { return true; } 755}; 756 757/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 758/// 759class LValueReferenceType : public ReferenceType { 760 LValueReferenceType(QualType Referencee, QualType CanonicalRef) : 761 ReferenceType(LValueReference, Referencee, CanonicalRef) { 762 } 763 friend class ASTContext; // ASTContext creates these 764public: 765 virtual void getAsStringInternal(std::string &InnerString, 766 const PrintingPolicy &Policy) const; 767 768 static bool classof(const Type *T) { 769 return T->getTypeClass() == LValueReference; 770 } 771 static bool classof(const LValueReferenceType *) { return true; } 772}; 773 774/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 775/// 776class RValueReferenceType : public ReferenceType { 777 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 778 ReferenceType(RValueReference, Referencee, CanonicalRef) { 779 } 780 friend class ASTContext; // ASTContext creates these 781public: 782 virtual void getAsStringInternal(std::string &InnerString, 783 const PrintingPolicy &Policy) const; 784 785 static bool classof(const Type *T) { 786 return T->getTypeClass() == RValueReference; 787 } 788 static bool classof(const RValueReferenceType *) { return true; } 789}; 790 791/// MemberPointerType - C++ 8.3.3 - Pointers to members 792/// 793class MemberPointerType : public Type, public llvm::FoldingSetNode { 794 QualType PointeeType; 795 /// The class of which the pointee is a member. Must ultimately be a 796 /// RecordType, but could be a typedef or a template parameter too. 797 const Type *Class; 798 799 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 800 Type(MemberPointer, CanonicalPtr, 801 Cls->isDependentType() || Pointee->isDependentType()), 802 PointeeType(Pointee), Class(Cls) { 803 } 804 friend class ASTContext; // ASTContext creates these. 805public: 806 807 QualType getPointeeType() const { return PointeeType; } 808 809 const Type *getClass() const { return Class; } 810 811 virtual void getAsStringInternal(std::string &InnerString, 812 const PrintingPolicy &Policy) const; 813 814 void Profile(llvm::FoldingSetNodeID &ID) { 815 Profile(ID, getPointeeType(), getClass()); 816 } 817 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 818 const Type *Class) { 819 ID.AddPointer(Pointee.getAsOpaquePtr()); 820 ID.AddPointer(Class); 821 } 822 823 static bool classof(const Type *T) { 824 return T->getTypeClass() == MemberPointer; 825 } 826 static bool classof(const MemberPointerType *) { return true; } 827}; 828 829/// ArrayType - C99 6.7.5.2 - Array Declarators. 830/// 831class ArrayType : public Type, public llvm::FoldingSetNode { 832public: 833 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 834 /// an array with a static size (e.g. int X[static 4]), or an array 835 /// with a star size (e.g. int X[*]). 836 /// 'static' is only allowed on function parameters. 837 enum ArraySizeModifier { 838 Normal, Static, Star 839 }; 840private: 841 /// ElementType - The element type of the array. 842 QualType ElementType; 843 844 // NOTE: VC++ treats enums as signed, avoid using the ArraySizeModifier enum 845 /// NOTE: These fields are packed into the bitfields space in the Type class. 846 unsigned SizeModifier : 2; 847 848 /// IndexTypeQuals - Capture qualifiers in declarations like: 849 /// 'int X[static restrict 4]'. For function parameters only. 850 unsigned IndexTypeQuals : 3; 851 852protected: 853 // C++ [temp.dep.type]p1: 854 // A type is dependent if it is... 855 // - an array type constructed from any dependent type or whose 856 // size is specified by a constant expression that is 857 // value-dependent, 858 ArrayType(TypeClass tc, QualType et, QualType can, 859 ArraySizeModifier sm, unsigned tq) 860 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray), 861 ElementType(et), SizeModifier(sm), IndexTypeQuals(tq) {} 862 863 friend class ASTContext; // ASTContext creates these. 864public: 865 QualType getElementType() const { return ElementType; } 866 ArraySizeModifier getSizeModifier() const { 867 return ArraySizeModifier(SizeModifier); 868 } 869 unsigned getIndexTypeQualifier() const { return IndexTypeQuals; } 870 871 static bool classof(const Type *T) { 872 return T->getTypeClass() == ConstantArray || 873 T->getTypeClass() == ConstantArrayWithExpr || 874 T->getTypeClass() == ConstantArrayWithoutExpr || 875 T->getTypeClass() == VariableArray || 876 T->getTypeClass() == IncompleteArray || 877 T->getTypeClass() == DependentSizedArray; 878 } 879 static bool classof(const ArrayType *) { return true; } 880}; 881 882/// ConstantArrayType - This class represents the canonical version of 883/// C arrays with a specified constant size. For example, the canonical 884/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 885/// type is 'int' and the size is 404. 886class ConstantArrayType : public ArrayType { 887 llvm::APInt Size; // Allows us to unique the type. 888 889 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 890 ArraySizeModifier sm, unsigned tq) 891 : ArrayType(ConstantArray, et, can, sm, tq), 892 Size(size) {} 893protected: 894 ConstantArrayType(TypeClass tc, QualType et, QualType can, 895 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 896 : ArrayType(tc, et, can, sm, tq), Size(size) {} 897 friend class ASTContext; // ASTContext creates these. 898public: 899 const llvm::APInt &getSize() const { return Size; } 900 virtual void getAsStringInternal(std::string &InnerString, 901 const PrintingPolicy &Policy) const; 902 903 void Profile(llvm::FoldingSetNodeID &ID) { 904 Profile(ID, getElementType(), getSize(), 905 getSizeModifier(), getIndexTypeQualifier()); 906 } 907 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 908 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 909 unsigned TypeQuals) { 910 ID.AddPointer(ET.getAsOpaquePtr()); 911 ID.AddInteger(ArraySize.getZExtValue()); 912 ID.AddInteger(SizeMod); 913 ID.AddInteger(TypeQuals); 914 } 915 static bool classof(const Type *T) { 916 return T->getTypeClass() == ConstantArray || 917 T->getTypeClass() == ConstantArrayWithExpr || 918 T->getTypeClass() == ConstantArrayWithoutExpr; 919 } 920 static bool classof(const ConstantArrayType *) { return true; } 921}; 922 923/// ConstantArrayWithExprType - This class represents C arrays with a 924/// constant size specified by means of an integer constant expression. 925/// For example 'int A[sizeof(int)]' has ConstantArrayWithExprType where 926/// the element type is 'int' and the size expression is 'sizeof(int)'. 927/// These types are non-canonical. 928class ConstantArrayWithExprType : public ConstantArrayType { 929 /// SizeExpr - The ICE occurring in the concrete syntax. 930 Expr *SizeExpr; 931 /// Brackets - The left and right array brackets. 932 SourceRange Brackets; 933 934 ConstantArrayWithExprType(QualType et, QualType can, 935 const llvm::APInt &size, Expr *e, 936 ArraySizeModifier sm, unsigned tq, 937 SourceRange brackets) 938 : ConstantArrayType(ConstantArrayWithExpr, et, can, size, sm, tq), 939 SizeExpr(e), Brackets(brackets) {} 940 friend class ASTContext; // ASTContext creates these. 941 virtual void Destroy(ASTContext& C); 942 943public: 944 Expr *getSizeExpr() const { return SizeExpr; } 945 SourceRange getBracketsRange() const { return Brackets; } 946 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 947 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 948 949 virtual void getAsStringInternal(std::string &InnerString, 950 const PrintingPolicy &Policy) const; 951 952 static bool classof(const Type *T) { 953 return T->getTypeClass() == ConstantArrayWithExpr; 954 } 955 static bool classof(const ConstantArrayWithExprType *) { return true; } 956 957 void Profile(llvm::FoldingSetNodeID &ID) { 958 assert(0 && "Cannot unique ConstantArrayWithExprTypes."); 959 } 960}; 961 962/// ConstantArrayWithoutExprType - This class represents C arrays with a 963/// constant size that was not specified by an integer constant expression, 964/// but inferred by static semantics. 965/// For example 'int A[] = { 0, 1, 2 }' has ConstantArrayWithoutExprType. 966/// These types are non-canonical: the corresponding canonical type, 967/// having the size specified in an APInt object, is a ConstantArrayType. 968class ConstantArrayWithoutExprType : public ConstantArrayType { 969 970 ConstantArrayWithoutExprType(QualType et, QualType can, 971 const llvm::APInt &size, 972 ArraySizeModifier sm, unsigned tq) 973 : ConstantArrayType(ConstantArrayWithoutExpr, et, can, size, sm, tq) {} 974 friend class ASTContext; // ASTContext creates these. 975 976public: 977 virtual void getAsStringInternal(std::string &InnerString, 978 const PrintingPolicy &Policy) const; 979 980 static bool classof(const Type *T) { 981 return T->getTypeClass() == ConstantArrayWithoutExpr; 982 } 983 static bool classof(const ConstantArrayWithoutExprType *) { return true; } 984 985 void Profile(llvm::FoldingSetNodeID &ID) { 986 assert(0 && "Cannot unique ConstantArrayWithoutExprTypes."); 987 } 988}; 989 990/// IncompleteArrayType - This class represents C arrays with an unspecified 991/// size. For example 'int A[]' has an IncompleteArrayType where the element 992/// type is 'int' and the size is unspecified. 993class IncompleteArrayType : public ArrayType { 994 995 IncompleteArrayType(QualType et, QualType can, 996 ArraySizeModifier sm, unsigned tq) 997 : ArrayType(IncompleteArray, et, can, sm, tq) {} 998 friend class ASTContext; // ASTContext creates these. 999public: 1000 virtual void getAsStringInternal(std::string &InnerString, 1001 const PrintingPolicy &Policy) const; 1002 1003 static bool classof(const Type *T) { 1004 return T->getTypeClass() == IncompleteArray; 1005 } 1006 static bool classof(const IncompleteArrayType *) { return true; } 1007 1008 friend class StmtIteratorBase; 1009 1010 void Profile(llvm::FoldingSetNodeID &ID) { 1011 Profile(ID, getElementType(), getSizeModifier(), getIndexTypeQualifier()); 1012 } 1013 1014 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1015 ArraySizeModifier SizeMod, unsigned TypeQuals) { 1016 ID.AddPointer(ET.getAsOpaquePtr()); 1017 ID.AddInteger(SizeMod); 1018 ID.AddInteger(TypeQuals); 1019 } 1020}; 1021 1022/// VariableArrayType - This class represents C arrays with a specified size 1023/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 1024/// Since the size expression is an arbitrary expression, we store it as such. 1025/// 1026/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 1027/// should not be: two lexically equivalent variable array types could mean 1028/// different things, for example, these variables do not have the same type 1029/// dynamically: 1030/// 1031/// void foo(int x) { 1032/// int Y[x]; 1033/// ++x; 1034/// int Z[x]; 1035/// } 1036/// 1037class VariableArrayType : public ArrayType { 1038 /// SizeExpr - An assignment expression. VLA's are only permitted within 1039 /// a function block. 1040 Stmt *SizeExpr; 1041 /// Brackets - The left and right array brackets. 1042 SourceRange Brackets; 1043 1044 VariableArrayType(QualType et, QualType can, Expr *e, 1045 ArraySizeModifier sm, unsigned tq, 1046 SourceRange brackets) 1047 : ArrayType(VariableArray, et, can, sm, tq), 1048 SizeExpr((Stmt*) e), Brackets(brackets) {} 1049 friend class ASTContext; // ASTContext creates these. 1050 virtual void Destroy(ASTContext& C); 1051 1052public: 1053 Expr *getSizeExpr() const { 1054 // We use C-style casts instead of cast<> here because we do not wish 1055 // to have a dependency of Type.h on Stmt.h/Expr.h. 1056 return (Expr*) SizeExpr; 1057 } 1058 SourceRange getBracketsRange() const { return Brackets; } 1059 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1060 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1061 1062 virtual void getAsStringInternal(std::string &InnerString, 1063 const PrintingPolicy &Policy) const; 1064 1065 static bool classof(const Type *T) { 1066 return T->getTypeClass() == VariableArray; 1067 } 1068 static bool classof(const VariableArrayType *) { return true; } 1069 1070 friend class StmtIteratorBase; 1071 1072 void Profile(llvm::FoldingSetNodeID &ID) { 1073 assert(0 && "Cannnot unique VariableArrayTypes."); 1074 } 1075}; 1076 1077/// DependentSizedArrayType - This type represents an array type in 1078/// C++ whose size is a value-dependent expression. For example: 1079/// @code 1080/// template<typename T, int Size> 1081/// class array { 1082/// T data[Size]; 1083/// }; 1084/// @endcode 1085/// For these types, we won't actually know what the array bound is 1086/// until template instantiation occurs, at which point this will 1087/// become either a ConstantArrayType or a VariableArrayType. 1088class DependentSizedArrayType : public ArrayType { 1089 /// SizeExpr - An assignment expression that will instantiate to the 1090 /// size of the array. 1091 Stmt *SizeExpr; 1092 /// Brackets - The left and right array brackets. 1093 SourceRange Brackets; 1094 1095 DependentSizedArrayType(QualType et, QualType can, Expr *e, 1096 ArraySizeModifier sm, unsigned tq, 1097 SourceRange brackets) 1098 : ArrayType(DependentSizedArray, et, can, sm, tq), 1099 SizeExpr((Stmt*) e), Brackets(brackets) {} 1100 friend class ASTContext; // ASTContext creates these. 1101 virtual void Destroy(ASTContext& C); 1102 1103public: 1104 Expr *getSizeExpr() const { 1105 // We use C-style casts instead of cast<> here because we do not wish 1106 // to have a dependency of Type.h on Stmt.h/Expr.h. 1107 return (Expr*) SizeExpr; 1108 } 1109 SourceRange getBracketsRange() const { return Brackets; } 1110 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1111 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1112 1113 virtual void getAsStringInternal(std::string &InnerString, 1114 const PrintingPolicy &Policy) const; 1115 1116 static bool classof(const Type *T) { 1117 return T->getTypeClass() == DependentSizedArray; 1118 } 1119 static bool classof(const DependentSizedArrayType *) { return true; } 1120 1121 friend class StmtIteratorBase; 1122 1123 void Profile(llvm::FoldingSetNodeID &ID) { 1124 assert(0 && "Cannnot unique DependentSizedArrayTypes."); 1125 } 1126}; 1127 1128/// DependentSizedExtVectorType - This type represent an extended vector type 1129/// where either the type or size is dependent. For example: 1130/// @code 1131/// template<typename T, int Size> 1132/// class vector { 1133/// typedef T __attribute__((ext_vector_type(Size))) type; 1134/// } 1135/// @endcode 1136class DependentSizedExtVectorType : public Type { 1137 Expr *SizeExpr; 1138 /// ElementType - The element type of the array. 1139 QualType ElementType; 1140 SourceLocation loc; 1141 1142 DependentSizedExtVectorType(QualType ElementType, QualType can, 1143 Expr *SizeExpr, SourceLocation loc) 1144 : Type (DependentSizedExtVector, can, true), 1145 SizeExpr(SizeExpr), ElementType(ElementType), loc(loc) {} 1146 friend class ASTContext; 1147 virtual void Destroy(ASTContext& C); 1148 1149public: 1150 const Expr *getSizeExpr() const { return SizeExpr; } 1151 QualType getElementType() const { return ElementType; } 1152 SourceLocation getAttributeLoc() const { return loc; } 1153 1154 virtual void getAsStringInternal(std::string &InnerString, 1155 const PrintingPolicy &Policy) const; 1156 1157 static bool classof(const Type *T) { 1158 return T->getTypeClass() == DependentSizedExtVector; 1159 } 1160 static bool classof(const DependentSizedExtVectorType *) { return true; } 1161}; 1162 1163 1164/// VectorType - GCC generic vector type. This type is created using 1165/// __attribute__((vector_size(n)), where "n" specifies the vector size in 1166/// bytes. Since the constructor takes the number of vector elements, the 1167/// client is responsible for converting the size into the number of elements. 1168class VectorType : public Type, public llvm::FoldingSetNode { 1169protected: 1170 /// ElementType - The element type of the vector. 1171 QualType ElementType; 1172 1173 /// NumElements - The number of elements in the vector. 1174 unsigned NumElements; 1175 1176 VectorType(QualType vecType, unsigned nElements, QualType canonType) : 1177 Type(Vector, canonType, vecType->isDependentType()), 1178 ElementType(vecType), NumElements(nElements) {} 1179 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 1180 QualType canonType) 1181 : Type(tc, canonType, vecType->isDependentType()), ElementType(vecType), 1182 NumElements(nElements) {} 1183 friend class ASTContext; // ASTContext creates these. 1184public: 1185 1186 QualType getElementType() const { return ElementType; } 1187 unsigned getNumElements() const { return NumElements; } 1188 1189 virtual void getAsStringInternal(std::string &InnerString, 1190 const PrintingPolicy &Policy) const; 1191 1192 void Profile(llvm::FoldingSetNodeID &ID) { 1193 Profile(ID, getElementType(), getNumElements(), getTypeClass()); 1194 } 1195 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 1196 unsigned NumElements, TypeClass TypeClass) { 1197 ID.AddPointer(ElementType.getAsOpaquePtr()); 1198 ID.AddInteger(NumElements); 1199 ID.AddInteger(TypeClass); 1200 } 1201 static bool classof(const Type *T) { 1202 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 1203 } 1204 static bool classof(const VectorType *) { return true; } 1205}; 1206 1207/// ExtVectorType - Extended vector type. This type is created using 1208/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 1209/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 1210/// class enables syntactic extensions, like Vector Components for accessing 1211/// points, colors, and textures (modeled after OpenGL Shading Language). 1212class ExtVectorType : public VectorType { 1213 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 1214 VectorType(ExtVector, vecType, nElements, canonType) {} 1215 friend class ASTContext; // ASTContext creates these. 1216public: 1217 static int getPointAccessorIdx(char c) { 1218 switch (c) { 1219 default: return -1; 1220 case 'x': return 0; 1221 case 'y': return 1; 1222 case 'z': return 2; 1223 case 'w': return 3; 1224 } 1225 } 1226 static int getNumericAccessorIdx(char c) { 1227 switch (c) { 1228 default: return -1; 1229 case '0': return 0; 1230 case '1': return 1; 1231 case '2': return 2; 1232 case '3': return 3; 1233 case '4': return 4; 1234 case '5': return 5; 1235 case '6': return 6; 1236 case '7': return 7; 1237 case '8': return 8; 1238 case '9': return 9; 1239 case 'A': 1240 case 'a': return 10; 1241 case 'B': 1242 case 'b': return 11; 1243 case 'C': 1244 case 'c': return 12; 1245 case 'D': 1246 case 'd': return 13; 1247 case 'E': 1248 case 'e': return 14; 1249 case 'F': 1250 case 'f': return 15; 1251 } 1252 } 1253 1254 static int getAccessorIdx(char c) { 1255 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 1256 return getNumericAccessorIdx(c); 1257 } 1258 1259 bool isAccessorWithinNumElements(char c) const { 1260 if (int idx = getAccessorIdx(c)+1) 1261 return unsigned(idx-1) < NumElements; 1262 return false; 1263 } 1264 virtual void getAsStringInternal(std::string &InnerString, 1265 const PrintingPolicy &Policy) const; 1266 1267 static bool classof(const Type *T) { 1268 return T->getTypeClass() == ExtVector; 1269 } 1270 static bool classof(const ExtVectorType *) { return true; } 1271}; 1272 1273/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 1274/// class of FunctionNoProtoType and FunctionProtoType. 1275/// 1276class FunctionType : public Type { 1277 /// SubClassData - This field is owned by the subclass, put here to pack 1278 /// tightly with the ivars in Type. 1279 bool SubClassData : 1; 1280 1281 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1282 /// other bitfields. 1283 /// The qualifiers are part of FunctionProtoType because... 1284 /// 1285 /// C++ 8.3.5p4: The return type, the parameter type list and the 1286 /// cv-qualifier-seq, [...], are part of the function type. 1287 /// 1288 unsigned TypeQuals : 3; 1289 1290 // The type returned by the function. 1291 QualType ResultType; 1292protected: 1293 FunctionType(TypeClass tc, QualType res, bool SubclassInfo, 1294 unsigned typeQuals, QualType Canonical, bool Dependent) 1295 : Type(tc, Canonical, Dependent), 1296 SubClassData(SubclassInfo), TypeQuals(typeQuals), ResultType(res) {} 1297 bool getSubClassData() const { return SubClassData; } 1298 unsigned getTypeQuals() const { return TypeQuals; } 1299public: 1300 1301 QualType getResultType() const { return ResultType; } 1302 1303 1304 static bool classof(const Type *T) { 1305 return T->getTypeClass() == FunctionNoProto || 1306 T->getTypeClass() == FunctionProto; 1307 } 1308 static bool classof(const FunctionType *) { return true; } 1309}; 1310 1311/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 1312/// no information available about its arguments. 1313class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 1314 FunctionNoProtoType(QualType Result, QualType Canonical) 1315 : FunctionType(FunctionNoProto, Result, false, 0, Canonical, 1316 /*Dependent=*/false) {} 1317 friend class ASTContext; // ASTContext creates these. 1318public: 1319 // No additional state past what FunctionType provides. 1320 1321 virtual void getAsStringInternal(std::string &InnerString, 1322 const PrintingPolicy &Policy) const; 1323 1324 void Profile(llvm::FoldingSetNodeID &ID) { 1325 Profile(ID, getResultType()); 1326 } 1327 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType) { 1328 ID.AddPointer(ResultType.getAsOpaquePtr()); 1329 } 1330 1331 static bool classof(const Type *T) { 1332 return T->getTypeClass() == FunctionNoProto; 1333 } 1334 static bool classof(const FunctionNoProtoType *) { return true; } 1335}; 1336 1337/// FunctionProtoType - Represents a prototype with argument type info, e.g. 1338/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 1339/// arguments, not as having a single void argument. Such a type can have an 1340/// exception specification, but this specification is not part of the canonical 1341/// type. 1342class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 1343 /// hasAnyDependentType - Determine whether there are any dependent 1344 /// types within the arguments passed in. 1345 static bool hasAnyDependentType(const QualType *ArgArray, unsigned numArgs) { 1346 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 1347 if (ArgArray[Idx]->isDependentType()) 1348 return true; 1349 1350 return false; 1351 } 1352 1353 FunctionProtoType(QualType Result, const QualType *ArgArray, unsigned numArgs, 1354 bool isVariadic, unsigned typeQuals, bool hasExs, 1355 bool hasAnyExs, const QualType *ExArray, 1356 unsigned numExs, QualType Canonical) 1357 : FunctionType(FunctionProto, Result, isVariadic, typeQuals, Canonical, 1358 (Result->isDependentType() || 1359 hasAnyDependentType(ArgArray, numArgs))), 1360 NumArgs(numArgs), NumExceptions(numExs), HasExceptionSpec(hasExs), 1361 AnyExceptionSpec(hasAnyExs) { 1362 // Fill in the trailing argument array. 1363 QualType *ArgInfo = reinterpret_cast<QualType*>(this+1); 1364 for (unsigned i = 0; i != numArgs; ++i) 1365 ArgInfo[i] = ArgArray[i]; 1366 // Fill in the exception array. 1367 QualType *Ex = ArgInfo + numArgs; 1368 for (unsigned i = 0; i != numExs; ++i) 1369 Ex[i] = ExArray[i]; 1370 } 1371 1372 /// NumArgs - The number of arguments this function has, not counting '...'. 1373 unsigned NumArgs : 20; 1374 1375 /// NumExceptions - The number of types in the exception spec, if any. 1376 unsigned NumExceptions : 10; 1377 1378 /// HasExceptionSpec - Whether this function has an exception spec at all. 1379 bool HasExceptionSpec : 1; 1380 1381 /// AnyExceptionSpec - Whether this function has a throw(...) spec. 1382 bool AnyExceptionSpec : 1; 1383 1384 /// ArgInfo - There is an variable size array after the class in memory that 1385 /// holds the argument types. 1386 1387 /// Exceptions - There is another variable size array after ArgInfo that 1388 /// holds the exception types. 1389 1390 friend class ASTContext; // ASTContext creates these. 1391 1392public: 1393 unsigned getNumArgs() const { return NumArgs; } 1394 QualType getArgType(unsigned i) const { 1395 assert(i < NumArgs && "Invalid argument number!"); 1396 return arg_type_begin()[i]; 1397 } 1398 1399 bool hasExceptionSpec() const { return HasExceptionSpec; } 1400 bool hasAnyExceptionSpec() const { return AnyExceptionSpec; } 1401 unsigned getNumExceptions() const { return NumExceptions; } 1402 QualType getExceptionType(unsigned i) const { 1403 assert(i < NumExceptions && "Invalid exception number!"); 1404 return exception_begin()[i]; 1405 } 1406 bool hasEmptyExceptionSpec() const { 1407 return hasExceptionSpec() && !hasAnyExceptionSpec() && 1408 getNumExceptions() == 0; 1409 } 1410 1411 bool isVariadic() const { return getSubClassData(); } 1412 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 1413 1414 typedef const QualType *arg_type_iterator; 1415 arg_type_iterator arg_type_begin() const { 1416 return reinterpret_cast<const QualType *>(this+1); 1417 } 1418 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 1419 1420 typedef const QualType *exception_iterator; 1421 exception_iterator exception_begin() const { 1422 // exceptions begin where arguments end 1423 return arg_type_end(); 1424 } 1425 exception_iterator exception_end() const { 1426 return exception_begin() + NumExceptions; 1427 } 1428 1429 virtual void getAsStringInternal(std::string &InnerString, 1430 const PrintingPolicy &Policy) const; 1431 1432 static bool classof(const Type *T) { 1433 return T->getTypeClass() == FunctionProto; 1434 } 1435 static bool classof(const FunctionProtoType *) { return true; } 1436 1437 void Profile(llvm::FoldingSetNodeID &ID); 1438 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 1439 arg_type_iterator ArgTys, unsigned NumArgs, 1440 bool isVariadic, unsigned TypeQuals, 1441 bool hasExceptionSpec, bool anyExceptionSpec, 1442 unsigned NumExceptions, exception_iterator Exs); 1443}; 1444 1445 1446class TypedefType : public Type { 1447 TypedefDecl *Decl; 1448protected: 1449 TypedefType(TypeClass tc, TypedefDecl *D, QualType can) 1450 : Type(tc, can, can->isDependentType()), Decl(D) { 1451 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1452 } 1453 friend class ASTContext; // ASTContext creates these. 1454public: 1455 1456 TypedefDecl *getDecl() const { return Decl; } 1457 1458 /// LookThroughTypedefs - Return the ultimate type this typedef corresponds to 1459 /// potentially looking through *all* consecutive typedefs. This returns the 1460 /// sum of the type qualifiers, so if you have: 1461 /// typedef const int A; 1462 /// typedef volatile A B; 1463 /// looking through the typedefs for B will give you "const volatile A". 1464 QualType LookThroughTypedefs() const; 1465 1466 virtual void getAsStringInternal(std::string &InnerString, 1467 const PrintingPolicy &Policy) const; 1468 1469 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 1470 static bool classof(const TypedefType *) { return true; } 1471}; 1472 1473/// TypeOfExprType (GCC extension). 1474class TypeOfExprType : public Type { 1475 Expr *TOExpr; 1476 TypeOfExprType(Expr *E, QualType can = QualType()); 1477 friend class ASTContext; // ASTContext creates these. 1478public: 1479 Expr *getUnderlyingExpr() const { return TOExpr; } 1480 1481 virtual void getAsStringInternal(std::string &InnerString, 1482 const PrintingPolicy &Policy) const; 1483 1484 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 1485 static bool classof(const TypeOfExprType *) { return true; } 1486}; 1487 1488/// TypeOfType (GCC extension). 1489class TypeOfType : public Type { 1490 QualType TOType; 1491 TypeOfType(QualType T, QualType can) 1492 : Type(TypeOf, can, T->isDependentType()), TOType(T) { 1493 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1494 } 1495 friend class ASTContext; // ASTContext creates these. 1496public: 1497 QualType getUnderlyingType() const { return TOType; } 1498 1499 virtual void getAsStringInternal(std::string &InnerString, 1500 const PrintingPolicy &Policy) const; 1501 1502 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 1503 static bool classof(const TypeOfType *) { return true; } 1504}; 1505 1506/// DecltypeType (C++0x) 1507class DecltypeType : public Type { 1508 Expr *E; 1509 1510 // FIXME: We could get rid of UnderlyingType if we wanted to: We would have to 1511 // Move getDesugaredType to ASTContext so that it can call getDecltypeForExpr 1512 // from it. 1513 QualType UnderlyingType; 1514 1515 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 1516 friend class ASTContext; // ASTContext creates these. 1517public: 1518 Expr *getUnderlyingExpr() const { return E; } 1519 QualType getUnderlyingType() const { return UnderlyingType; } 1520 1521 virtual void getAsStringInternal(std::string &InnerString, 1522 const PrintingPolicy &Policy) const; 1523 1524 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 1525 static bool classof(const DecltypeType *) { return true; } 1526}; 1527 1528class TagType : public Type { 1529 /// Stores the TagDecl associated with this type. The decl will 1530 /// point to the TagDecl that actually defines the entity (or is a 1531 /// definition in progress), if there is such a definition. The 1532 /// single-bit value will be non-zero when this tag is in the 1533 /// process of being defined. 1534 mutable llvm::PointerIntPair<TagDecl *, 1> decl; 1535 friend class ASTContext; 1536 friend class TagDecl; 1537 1538protected: 1539 TagType(TypeClass TC, TagDecl *D, QualType can); 1540 1541public: 1542 TagDecl *getDecl() const { return decl.getPointer(); } 1543 1544 /// @brief Determines whether this type is in the process of being 1545 /// defined. 1546 bool isBeingDefined() const { return decl.getInt(); } 1547 void setBeingDefined(bool Def) { decl.setInt(Def? 1 : 0); } 1548 1549 virtual void getAsStringInternal(std::string &InnerString, 1550 const PrintingPolicy &Policy) const; 1551 1552 static bool classof(const Type *T) { 1553 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 1554 } 1555 static bool classof(const TagType *) { return true; } 1556 static bool classof(const RecordType *) { return true; } 1557 static bool classof(const EnumType *) { return true; } 1558}; 1559 1560/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 1561/// to detect TagType objects of structs/unions/classes. 1562class RecordType : public TagType { 1563protected: 1564 explicit RecordType(RecordDecl *D) 1565 : TagType(Record, reinterpret_cast<TagDecl*>(D), QualType()) { } 1566 explicit RecordType(TypeClass TC, RecordDecl *D) 1567 : TagType(TC, reinterpret_cast<TagDecl*>(D), QualType()) { } 1568 friend class ASTContext; // ASTContext creates these. 1569public: 1570 1571 RecordDecl *getDecl() const { 1572 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 1573 } 1574 1575 // FIXME: This predicate is a helper to QualType/Type. It needs to 1576 // recursively check all fields for const-ness. If any field is declared 1577 // const, it needs to return false. 1578 bool hasConstFields() const { return false; } 1579 1580 // FIXME: RecordType needs to check when it is created that all fields are in 1581 // the same address space, and return that. 1582 unsigned getAddressSpace() const { return 0; } 1583 1584 static bool classof(const TagType *T); 1585 static bool classof(const Type *T) { 1586 return isa<TagType>(T) && classof(cast<TagType>(T)); 1587 } 1588 static bool classof(const RecordType *) { return true; } 1589}; 1590 1591/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 1592/// to detect TagType objects of enums. 1593class EnumType : public TagType { 1594 explicit EnumType(EnumDecl *D) 1595 : TagType(Enum, reinterpret_cast<TagDecl*>(D), QualType()) { } 1596 friend class ASTContext; // ASTContext creates these. 1597public: 1598 1599 EnumDecl *getDecl() const { 1600 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 1601 } 1602 1603 static bool classof(const TagType *T); 1604 static bool classof(const Type *T) { 1605 return isa<TagType>(T) && classof(cast<TagType>(T)); 1606 } 1607 static bool classof(const EnumType *) { return true; } 1608}; 1609 1610class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 1611 unsigned Depth : 15; 1612 unsigned Index : 16; 1613 unsigned ParameterPack : 1; 1614 IdentifierInfo *Name; 1615 1616 TemplateTypeParmType(unsigned D, unsigned I, bool PP, IdentifierInfo *N, 1617 QualType Canon) 1618 : Type(TemplateTypeParm, Canon, /*Dependent=*/true), 1619 Depth(D), Index(I), ParameterPack(PP), Name(N) { } 1620 1621 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 1622 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true), 1623 Depth(D), Index(I), ParameterPack(PP), Name(0) { } 1624 1625 friend class ASTContext; // ASTContext creates these 1626 1627public: 1628 unsigned getDepth() const { return Depth; } 1629 unsigned getIndex() const { return Index; } 1630 bool isParameterPack() const { return ParameterPack; } 1631 IdentifierInfo *getName() const { return Name; } 1632 1633 virtual void getAsStringInternal(std::string &InnerString, 1634 const PrintingPolicy &Policy) const; 1635 1636 void Profile(llvm::FoldingSetNodeID &ID) { 1637 Profile(ID, Depth, Index, ParameterPack, Name); 1638 } 1639 1640 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 1641 unsigned Index, bool ParameterPack, 1642 IdentifierInfo *Name) { 1643 ID.AddInteger(Depth); 1644 ID.AddInteger(Index); 1645 ID.AddBoolean(ParameterPack); 1646 ID.AddPointer(Name); 1647 } 1648 1649 static bool classof(const Type *T) { 1650 return T->getTypeClass() == TemplateTypeParm; 1651 } 1652 static bool classof(const TemplateTypeParmType *T) { return true; } 1653}; 1654 1655/// \brief Represents the type of a template specialization as written 1656/// in the source code. 1657/// 1658/// Template specialization types represent the syntactic form of a 1659/// template-id that refers to a type, e.g., @c vector<int>. Some 1660/// template specialization types are syntactic sugar, whose canonical 1661/// type will point to some other type node that represents the 1662/// instantiation or class template specialization. For example, a 1663/// class template specialization type of @c vector<int> will refer to 1664/// a tag type for the instantiation 1665/// @c std::vector<int, std::allocator<int>>. 1666/// 1667/// Other template specialization types, for which the template name 1668/// is dependent, may be canonical types. These types are always 1669/// dependent. 1670class TemplateSpecializationType 1671 : public Type, public llvm::FoldingSetNode { 1672 1673 /// \brief The name of the template being specialized. 1674 TemplateName Template; 1675 1676 /// \brief - The number of template arguments named in this class 1677 /// template specialization. 1678 unsigned NumArgs; 1679 1680 TemplateSpecializationType(TemplateName T, 1681 const TemplateArgument *Args, 1682 unsigned NumArgs, QualType Canon); 1683 1684 virtual void Destroy(ASTContext& C); 1685 1686 friend class ASTContext; // ASTContext creates these 1687 1688public: 1689 /// \brief Determine whether any of the given template arguments are 1690 /// dependent. 1691 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 1692 unsigned NumArgs); 1693 1694 /// \brief Print a template argument list, including the '<' and '>' 1695 /// enclosing the template arguments. 1696 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 1697 unsigned NumArgs, 1698 const PrintingPolicy &Policy); 1699 1700 typedef const TemplateArgument * iterator; 1701 1702 iterator begin() const { return getArgs(); } 1703 iterator end() const; 1704 1705 /// \brief Retrieve the name of the template that we are specializing. 1706 TemplateName getTemplateName() const { return Template; } 1707 1708 /// \brief Retrieve the template arguments. 1709 const TemplateArgument *getArgs() const { 1710 return reinterpret_cast<const TemplateArgument *>(this + 1); 1711 } 1712 1713 /// \brief Retrieve the number of template arguments. 1714 unsigned getNumArgs() const { return NumArgs; } 1715 1716 /// \brief Retrieve a specific template argument as a type. 1717 /// \precondition @c isArgType(Arg) 1718 const TemplateArgument &getArg(unsigned Idx) const; 1719 1720 virtual void getAsStringInternal(std::string &InnerString, 1721 const PrintingPolicy &Policy) const; 1722 1723 void Profile(llvm::FoldingSetNodeID &ID) { 1724 Profile(ID, Template, getArgs(), NumArgs); 1725 } 1726 1727 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 1728 const TemplateArgument *Args, unsigned NumArgs); 1729 1730 static bool classof(const Type *T) { 1731 return T->getTypeClass() == TemplateSpecialization; 1732 } 1733 static bool classof(const TemplateSpecializationType *T) { return true; } 1734}; 1735 1736/// \brief Represents a type that was referred to via a qualified 1737/// name, e.g., N::M::type. 1738/// 1739/// This type is used to keep track of a type name as written in the 1740/// source code, including any nested-name-specifiers. The type itself 1741/// is always "sugar", used to express what was written in the source 1742/// code but containing no additional semantic information. 1743class QualifiedNameType : public Type, public llvm::FoldingSetNode { 1744 /// \brief The nested name specifier containing the qualifier. 1745 NestedNameSpecifier *NNS; 1746 1747 /// \brief The type that this qualified name refers to. 1748 QualType NamedType; 1749 1750 QualifiedNameType(NestedNameSpecifier *NNS, QualType NamedType, 1751 QualType CanonType) 1752 : Type(QualifiedName, CanonType, NamedType->isDependentType()), 1753 NNS(NNS), NamedType(NamedType) { } 1754 1755 friend class ASTContext; // ASTContext creates these 1756 1757public: 1758 /// \brief Retrieve the qualification on this type. 1759 NestedNameSpecifier *getQualifier() const { return NNS; } 1760 1761 /// \brief Retrieve the type named by the qualified-id. 1762 QualType getNamedType() const { return NamedType; } 1763 1764 virtual void getAsStringInternal(std::string &InnerString, 1765 const PrintingPolicy &Policy) const; 1766 1767 void Profile(llvm::FoldingSetNodeID &ID) { 1768 Profile(ID, NNS, NamedType); 1769 } 1770 1771 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 1772 QualType NamedType) { 1773 ID.AddPointer(NNS); 1774 NamedType.Profile(ID); 1775 } 1776 1777 static bool classof(const Type *T) { 1778 return T->getTypeClass() == QualifiedName; 1779 } 1780 static bool classof(const QualifiedNameType *T) { return true; } 1781}; 1782 1783/// \brief Represents a 'typename' specifier that names a type within 1784/// a dependent type, e.g., "typename T::type". 1785/// 1786/// TypenameType has a very similar structure to QualifiedNameType, 1787/// which also involves a nested-name-specifier following by a type, 1788/// and (FIXME!) both can even be prefixed by the 'typename' 1789/// keyword. However, the two types serve very different roles: 1790/// QualifiedNameType is a non-semantic type that serves only as sugar 1791/// to show how a particular type was written in the source 1792/// code. TypenameType, on the other hand, only occurs when the 1793/// nested-name-specifier is dependent, such that we cannot resolve 1794/// the actual type until after instantiation. 1795class TypenameType : public Type, public llvm::FoldingSetNode { 1796 /// \brief The nested name specifier containing the qualifier. 1797 NestedNameSpecifier *NNS; 1798 1799 typedef llvm::PointerUnion<const IdentifierInfo *, 1800 const TemplateSpecializationType *> NameType; 1801 1802 /// \brief The type that this typename specifier refers to. 1803 NameType Name; 1804 1805 TypenameType(NestedNameSpecifier *NNS, const IdentifierInfo *Name, 1806 QualType CanonType) 1807 : Type(Typename, CanonType, true), NNS(NNS), Name(Name) { 1808 assert(NNS->isDependent() && 1809 "TypenameType requires a dependent nested-name-specifier"); 1810 } 1811 1812 TypenameType(NestedNameSpecifier *NNS, const TemplateSpecializationType *Ty, 1813 QualType CanonType) 1814 : Type(Typename, CanonType, true), NNS(NNS), Name(Ty) { 1815 assert(NNS->isDependent() && 1816 "TypenameType requires a dependent nested-name-specifier"); 1817 } 1818 1819 friend class ASTContext; // ASTContext creates these 1820 1821public: 1822 /// \brief Retrieve the qualification on this type. 1823 NestedNameSpecifier *getQualifier() const { return NNS; } 1824 1825 /// \brief Retrieve the type named by the typename specifier as an 1826 /// identifier. 1827 /// 1828 /// This routine will return a non-NULL identifier pointer when the 1829 /// form of the original typename was terminated by an identifier, 1830 /// e.g., "typename T::type". 1831 const IdentifierInfo *getIdentifier() const { 1832 return Name.dyn_cast<const IdentifierInfo *>(); 1833 } 1834 1835 /// \brief Retrieve the type named by the typename specifier as a 1836 /// type specialization. 1837 const TemplateSpecializationType *getTemplateId() const { 1838 return Name.dyn_cast<const TemplateSpecializationType *>(); 1839 } 1840 1841 virtual void getAsStringInternal(std::string &InnerString, 1842 const PrintingPolicy &Policy) const; 1843 1844 void Profile(llvm::FoldingSetNodeID &ID) { 1845 Profile(ID, NNS, Name); 1846 } 1847 1848 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 1849 NameType Name) { 1850 ID.AddPointer(NNS); 1851 ID.AddPointer(Name.getOpaqueValue()); 1852 } 1853 1854 static bool classof(const Type *T) { 1855 return T->getTypeClass() == Typename; 1856 } 1857 static bool classof(const TypenameType *T) { return true; } 1858}; 1859 1860/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 1861/// object oriented design. They basically correspond to C++ classes. There 1862/// are two kinds of interface types, normal interfaces like "NSString" and 1863/// qualified interfaces, which are qualified with a protocol list like 1864/// "NSString<NSCopyable, NSAmazing>". 1865class ObjCInterfaceType : public Type, public llvm::FoldingSetNode { 1866 ObjCInterfaceDecl *Decl; 1867 1868 // List of protocols for this protocol conforming object type 1869 // List is sorted on protocol name. No protocol is enterred more than once. 1870 llvm::SmallVector<ObjCProtocolDecl*, 4> Protocols; 1871 1872 ObjCInterfaceType(ObjCInterfaceDecl *D, 1873 ObjCProtocolDecl **Protos, unsigned NumP) : 1874 Type(ObjCInterface, QualType(), /*Dependent=*/false), 1875 Decl(D), Protocols(Protos, Protos+NumP) { } 1876 friend class ASTContext; // ASTContext creates these. 1877public: 1878 ObjCInterfaceDecl *getDecl() const { return Decl; } 1879 1880 /// getNumProtocols - Return the number of qualifying protocols in this 1881 /// interface type, or 0 if there are none. 1882 unsigned getNumProtocols() const { return Protocols.size(); } 1883 1884 /// qual_iterator and friends: this provides access to the (potentially empty) 1885 /// list of protocols qualifying this interface. 1886 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 1887 qual_iterator qual_begin() const { return Protocols.begin(); } 1888 qual_iterator qual_end() const { return Protocols.end(); } 1889 bool qual_empty() const { return Protocols.size() == 0; } 1890 1891 virtual void getAsStringInternal(std::string &InnerString, 1892 const PrintingPolicy &Policy) const; 1893 1894 void Profile(llvm::FoldingSetNodeID &ID); 1895 static void Profile(llvm::FoldingSetNodeID &ID, 1896 const ObjCInterfaceDecl *Decl, 1897 ObjCProtocolDecl **protocols, unsigned NumProtocols); 1898 1899 static bool classof(const Type *T) { 1900 return T->getTypeClass() == ObjCInterface; 1901 } 1902 static bool classof(const ObjCInterfaceType *) { return true; } 1903}; 1904 1905/// ObjCObjectPointerType - Used to represent 'id', 'Interface *', 'id <p>', 1906/// and 'Interface <p> *'. 1907/// 1908/// Duplicate protocols are removed and protocol list is canonicalized to be in 1909/// alphabetical order. 1910class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 1911 QualType PointeeType; // A builtin or interface type. 1912 1913 // List of protocols for this protocol conforming object type 1914 // List is sorted on protocol name. No protocol is entered more than once. 1915 llvm::SmallVector<ObjCProtocolDecl*, 8> Protocols; 1916 1917 ObjCObjectPointerType(QualType T, ObjCProtocolDecl **Protos, unsigned NumP) : 1918 Type(ObjCObjectPointer, QualType(), /*Dependent=*/false), 1919 PointeeType(T), Protocols(Protos, Protos+NumP) { } 1920 friend class ASTContext; // ASTContext creates these. 1921 1922public: 1923 // Get the pointee type. Pointee will either be: 1924 // - a built-in type (for 'id' and 'Class'). 1925 // - an interface type (for user-defined types). 1926 // - a TypedefType whose canonical type is an interface (as in 'T' below). 1927 // For example: typedef NSObject T; T *var; 1928 QualType getPointeeType() const { return PointeeType; } 1929 1930 const ObjCInterfaceType *getInterfaceType() const { 1931 return PointeeType->getAsObjCInterfaceType(); 1932 } 1933 /// getInterfaceDecl - returns an interface decl for user-defined types. 1934 ObjCInterfaceDecl *getInterfaceDecl() const { 1935 return getInterfaceType() ? getInterfaceType()->getDecl() : 0; 1936 } 1937 /// isObjCIdType - true for "id". 1938 bool isObjCIdType() const { 1939 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCId) && 1940 !Protocols.size(); 1941 } 1942 /// isObjCClassType - true for "Class". 1943 bool isObjCClassType() const { 1944 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCClass) && 1945 !Protocols.size(); 1946 } 1947 /// isObjCQualifiedIdType - true for "id <p>". 1948 bool isObjCQualifiedIdType() const { 1949 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCId) && 1950 Protocols.size(); 1951 } 1952 /// isObjCQualifiedClassType - true for "Class <p>". 1953 bool isQualifiedClassType() const { 1954 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCClass) && 1955 Protocols.size(); 1956 } 1957 /// qual_iterator and friends: this provides access to the (potentially empty) 1958 /// list of protocols qualifying this interface. 1959 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 1960 1961 qual_iterator qual_begin() const { return Protocols.begin(); } 1962 qual_iterator qual_end() const { return Protocols.end(); } 1963 bool qual_empty() const { return Protocols.size() == 0; } 1964 1965 /// getNumProtocols - Return the number of qualifying protocols in this 1966 /// interface type, or 0 if there are none. 1967 unsigned getNumProtocols() const { return Protocols.size(); } 1968 1969 void Profile(llvm::FoldingSetNodeID &ID); 1970 static void Profile(llvm::FoldingSetNodeID &ID, QualType T, 1971 ObjCProtocolDecl **protocols, unsigned NumProtocols); 1972 virtual void getAsStringInternal(std::string &InnerString, 1973 const PrintingPolicy &Policy) const; 1974 static bool classof(const Type *T) { 1975 return T->getTypeClass() == ObjCObjectPointer; 1976 } 1977 static bool classof(const ObjCObjectPointerType *) { return true; } 1978}; 1979 1980// Inline function definitions. 1981 1982/// getUnqualifiedType - Return the type without any qualifiers. 1983inline QualType QualType::getUnqualifiedType() const { 1984 Type *TP = getTypePtr(); 1985 if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(TP)) 1986 TP = EXTQT->getBaseType(); 1987 return QualType(TP, 0); 1988} 1989 1990/// getAddressSpace - Return the address space of this type. 1991inline unsigned QualType::getAddressSpace() const { 1992 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 1993 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 1994 return AT->getElementType().getAddressSpace(); 1995 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 1996 return RT->getAddressSpace(); 1997 if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(CT)) 1998 return EXTQT->getAddressSpace(); 1999 return 0; 2000} 2001 2002/// getObjCGCAttr - Return the gc attribute of this type. 2003inline QualType::GCAttrTypes QualType::getObjCGCAttr() const { 2004 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2005 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 2006 return AT->getElementType().getObjCGCAttr(); 2007 if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(CT)) 2008 return EXTQT->getObjCGCAttr(); 2009 if (const ObjCObjectPointerType *PT = CT->getAsObjCObjectPointerType()) 2010 return PT->getPointeeType().getObjCGCAttr(); 2011 return GCNone; 2012} 2013 2014/// isMoreQualifiedThan - Determine whether this type is more 2015/// qualified than the Other type. For example, "const volatile int" 2016/// is more qualified than "const int", "volatile int", and 2017/// "int". However, it is not more qualified than "const volatile 2018/// int". 2019inline bool QualType::isMoreQualifiedThan(QualType Other) const { 2020 unsigned MyQuals = this->getCVRQualifiers(); 2021 unsigned OtherQuals = Other.getCVRQualifiers(); 2022 if (getAddressSpace() != Other.getAddressSpace()) 2023 return false; 2024 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 2025} 2026 2027/// isAtLeastAsQualifiedAs - Determine whether this type is at last 2028/// as qualified as the Other type. For example, "const volatile 2029/// int" is at least as qualified as "const int", "volatile int", 2030/// "int", and "const volatile int". 2031inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 2032 unsigned MyQuals = this->getCVRQualifiers(); 2033 unsigned OtherQuals = Other.getCVRQualifiers(); 2034 if (getAddressSpace() != Other.getAddressSpace()) 2035 return false; 2036 return (MyQuals | OtherQuals) == MyQuals; 2037} 2038 2039/// getNonReferenceType - If Type is a reference type (e.g., const 2040/// int&), returns the type that the reference refers to ("const 2041/// int"). Otherwise, returns the type itself. This routine is used 2042/// throughout Sema to implement C++ 5p6: 2043/// 2044/// If an expression initially has the type "reference to T" (8.3.2, 2045/// 8.5.3), the type is adjusted to "T" prior to any further 2046/// analysis, the expression designates the object or function 2047/// denoted by the reference, and the expression is an lvalue. 2048inline QualType QualType::getNonReferenceType() const { 2049 if (const ReferenceType *RefType = (*this)->getAsReferenceType()) 2050 return RefType->getPointeeType(); 2051 else 2052 return *this; 2053} 2054 2055inline const TypedefType* Type::getAsTypedefType() const { 2056 return dyn_cast<TypedefType>(this); 2057} 2058inline const ObjCInterfaceType *Type::getAsPointerToObjCInterfaceType() const { 2059 if (const PointerType *PT = getAsPointerType()) 2060 return PT->getPointeeType()->getAsObjCInterfaceType(); 2061 return 0; 2062} 2063 2064// NOTE: All of these methods use "getUnqualifiedType" to strip off address 2065// space qualifiers if present. 2066inline bool Type::isFunctionType() const { 2067 return isa<FunctionType>(CanonicalType.getUnqualifiedType()); 2068} 2069inline bool Type::isPointerType() const { 2070 return isa<PointerType>(CanonicalType.getUnqualifiedType()); 2071} 2072inline bool Type::isAnyPointerType() const { 2073 return isPointerType() || isObjCObjectPointerType(); 2074} 2075inline bool Type::isBlockPointerType() const { 2076 return isa<BlockPointerType>(CanonicalType.getUnqualifiedType()); 2077} 2078inline bool Type::isReferenceType() const { 2079 return isa<ReferenceType>(CanonicalType.getUnqualifiedType()); 2080} 2081inline bool Type::isLValueReferenceType() const { 2082 return isa<LValueReferenceType>(CanonicalType.getUnqualifiedType()); 2083} 2084inline bool Type::isRValueReferenceType() const { 2085 return isa<RValueReferenceType>(CanonicalType.getUnqualifiedType()); 2086} 2087inline bool Type::isFunctionPointerType() const { 2088 if (const PointerType* T = getAsPointerType()) 2089 return T->getPointeeType()->isFunctionType(); 2090 else 2091 return false; 2092} 2093inline bool Type::isMemberPointerType() const { 2094 return isa<MemberPointerType>(CanonicalType.getUnqualifiedType()); 2095} 2096inline bool Type::isMemberFunctionPointerType() const { 2097 if (const MemberPointerType* T = getAsMemberPointerType()) 2098 return T->getPointeeType()->isFunctionType(); 2099 else 2100 return false; 2101} 2102inline bool Type::isArrayType() const { 2103 return isa<ArrayType>(CanonicalType.getUnqualifiedType()); 2104} 2105inline bool Type::isConstantArrayType() const { 2106 return isa<ConstantArrayType>(CanonicalType.getUnqualifiedType()); 2107} 2108inline bool Type::isIncompleteArrayType() const { 2109 return isa<IncompleteArrayType>(CanonicalType.getUnqualifiedType()); 2110} 2111inline bool Type::isVariableArrayType() const { 2112 return isa<VariableArrayType>(CanonicalType.getUnqualifiedType()); 2113} 2114inline bool Type::isDependentSizedArrayType() const { 2115 return isa<DependentSizedArrayType>(CanonicalType.getUnqualifiedType()); 2116} 2117inline bool Type::isRecordType() const { 2118 return isa<RecordType>(CanonicalType.getUnqualifiedType()); 2119} 2120inline bool Type::isAnyComplexType() const { 2121 return isa<ComplexType>(CanonicalType.getUnqualifiedType()); 2122} 2123inline bool Type::isVectorType() const { 2124 return isa<VectorType>(CanonicalType.getUnqualifiedType()); 2125} 2126inline bool Type::isExtVectorType() const { 2127 return isa<ExtVectorType>(CanonicalType.getUnqualifiedType()); 2128} 2129inline bool Type::isObjCObjectPointerType() const { 2130 return isa<ObjCObjectPointerType>(CanonicalType.getUnqualifiedType()); 2131} 2132inline bool Type::isObjCInterfaceType() const { 2133 return isa<ObjCInterfaceType>(CanonicalType.getUnqualifiedType()); 2134} 2135inline bool Type::isObjCQualifiedIdType() const { 2136 if (const ObjCObjectPointerType *OPT = getAsObjCObjectPointerType()) 2137 return OPT->isObjCQualifiedIdType(); 2138 return false; 2139} 2140inline bool Type::isObjCIdType() const { 2141 if (const ObjCObjectPointerType *OPT = getAsObjCObjectPointerType()) 2142 return OPT->isObjCIdType(); 2143 return false; 2144} 2145inline bool Type::isObjCClassType() const { 2146 if (const ObjCObjectPointerType *OPT = getAsObjCObjectPointerType()) 2147 return OPT->isObjCClassType(); 2148 return false; 2149} 2150inline bool Type::isObjCBuiltinType() const { 2151 return isObjCIdType() || isObjCClassType(); 2152} 2153 2154inline bool Type::isTemplateTypeParmType() const { 2155 return isa<TemplateTypeParmType>(CanonicalType.getUnqualifiedType()); 2156} 2157 2158inline bool Type::isSpecificBuiltinType(unsigned K) const { 2159 if (const BuiltinType *BT = getAsBuiltinType()) 2160 if (BT->getKind() == (BuiltinType::Kind) K) 2161 return true; 2162 return false; 2163} 2164 2165/// \brief Determines whether this is a type for which one can define 2166/// an overloaded operator. 2167inline bool Type::isOverloadableType() const { 2168 return isDependentType() || isRecordType() || isEnumeralType(); 2169} 2170 2171inline bool Type::hasPointerRepresentation() const { 2172 return (isPointerType() || isReferenceType() || isBlockPointerType() || 2173 isObjCInterfaceType() || isObjCObjectPointerType() || 2174 isObjCQualifiedInterfaceType() || isNullPtrType()); 2175} 2176 2177inline bool Type::hasObjCPointerRepresentation() const { 2178 return (isObjCInterfaceType() || isObjCObjectPointerType() || 2179 isObjCQualifiedInterfaceType()); 2180} 2181 2182/// Insertion operator for diagnostics. This allows sending QualType's into a 2183/// diagnostic with <<. 2184inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 2185 QualType T) { 2186 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 2187 Diagnostic::ak_qualtype); 2188 return DB; 2189} 2190 2191/// Member-template getAs<specific type>'. 2192template <typename T> const T *Type::getAs() const { 2193 // If this is directly a T type, return it. 2194 if (const T *Ty = dyn_cast<T>(this)) 2195 return Ty; 2196 2197 // If the canonical form of this type isn't the right kind, reject it. 2198 if (!isa<T>(CanonicalType)) { 2199 // Look through type qualifiers 2200 if (isa<T>(CanonicalType.getUnqualifiedType())) 2201 return CanonicalType.getUnqualifiedType()->getAs<T>(); 2202 return 0; 2203 } 2204 2205 // If this is a typedef for a pointer type, strip the typedef off without 2206 // losing all typedef information. 2207 return cast<T>(getDesugaredType()); 2208} 2209 2210} // end namespace clang 2211 2212#endif 2213