Type.h revision de2e22d33afec98324a66a358dfe0951b3c7259a
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 ObjCQualifiedInterfaceType *getAsObjCQualifiedInterfaceType() const; 458 const TemplateTypeParmType *getAsTemplateTypeParmType() const; 459 460 const TemplateSpecializationType * 461 getAsTemplateSpecializationType() const; 462 463 /// getAsPointerToObjCInterfaceType - If this is a pointer to an ObjC 464 /// interface, return the interface type, otherwise return null. 465 const ObjCInterfaceType *getAsPointerToObjCInterfaceType() const; 466 467 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 468 /// element type of the array, potentially with type qualifiers missing. 469 /// This method should never be used when type qualifiers are meaningful. 470 const Type *getArrayElementTypeNoTypeQual() const; 471 472 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 473 /// pointer, this returns the respective pointee. 474 QualType getPointeeType() const; 475 476 /// getDesugaredType - Return the specified type with any "sugar" removed from 477 /// the type. This takes off typedefs, typeof's etc. If the outer level of 478 /// the type is already concrete, it returns it unmodified. This is similar 479 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 480 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 481 /// concrete. 482 QualType getDesugaredType(bool ForDisplay = false) const; 483 484 /// More type predicates useful for type checking/promotion 485 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 486 487 /// isSignedIntegerType - Return true if this is an integer type that is 488 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 489 /// an enum decl which has a signed representation, or a vector of signed 490 /// integer element type. 491 bool isSignedIntegerType() const; 492 493 /// isUnsignedIntegerType - Return true if this is an integer type that is 494 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 495 /// decl which has an unsigned representation, or a vector of unsigned integer 496 /// element type. 497 bool isUnsignedIntegerType() const; 498 499 /// isConstantSizeType - Return true if this is not a variable sized type, 500 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 501 /// incomplete types. 502 bool isConstantSizeType() const; 503 504 /// isSpecifierType - Returns true if this type can be represented by some 505 /// set of type specifiers. 506 bool isSpecifierType() const; 507 508 QualType getCanonicalTypeInternal() const { return CanonicalType; } 509 void dump() const; 510 virtual void getAsStringInternal(std::string &InnerString, 511 const PrintingPolicy &Policy) const = 0; 512 static bool classof(const Type *) { return true; } 513}; 514 515/// ExtQualType - TR18037 (C embedded extensions) 6.2.5p26 516/// This supports all kinds of type attributes; including, 517/// address space qualified types, objective-c's __weak and 518/// __strong attributes. 519/// 520class ExtQualType : public Type, public llvm::FoldingSetNode { 521 /// BaseType - This is the underlying type that this qualifies. All CVR 522 /// qualifiers are stored on the QualType that references this type, so we 523 /// can't have any here. 524 Type *BaseType; 525 526 /// Address Space ID - The address space ID this type is qualified with. 527 unsigned AddressSpace; 528 /// GC __weak/__strong attributes 529 QualType::GCAttrTypes GCAttrType; 530 531 ExtQualType(Type *Base, QualType CanonicalPtr, unsigned AddrSpace, 532 QualType::GCAttrTypes gcAttr) : 533 Type(ExtQual, CanonicalPtr, Base->isDependentType()), BaseType(Base), 534 AddressSpace(AddrSpace), GCAttrType(gcAttr) { 535 assert(!isa<ExtQualType>(BaseType) && 536 "Cannot have ExtQualType of ExtQualType"); 537 } 538 friend class ASTContext; // ASTContext creates these. 539public: 540 Type *getBaseType() const { return BaseType; } 541 QualType::GCAttrTypes getObjCGCAttr() const { return GCAttrType; } 542 unsigned getAddressSpace() const { return AddressSpace; } 543 544 virtual void getAsStringInternal(std::string &InnerString, 545 const PrintingPolicy &Policy) const; 546 547 void Profile(llvm::FoldingSetNodeID &ID) { 548 Profile(ID, getBaseType(), AddressSpace, GCAttrType); 549 } 550 static void Profile(llvm::FoldingSetNodeID &ID, Type *Base, 551 unsigned AddrSpace, QualType::GCAttrTypes gcAttr) { 552 ID.AddPointer(Base); 553 ID.AddInteger(AddrSpace); 554 ID.AddInteger(gcAttr); 555 } 556 557 static bool classof(const Type *T) { return T->getTypeClass() == ExtQual; } 558 static bool classof(const ExtQualType *) { return true; } 559}; 560 561 562/// BuiltinType - This class is used for builtin types like 'int'. Builtin 563/// types are always canonical and have a literal name field. 564class BuiltinType : public Type { 565public: 566 enum Kind { 567 Void, 568 569 Bool, // This is bool and/or _Bool. 570 Char_U, // This is 'char' for targets where char is unsigned. 571 UChar, // This is explicitly qualified unsigned char. 572 Char16, // This is 'char16_t' for C++. 573 Char32, // This is 'char32_t' for C++. 574 UShort, 575 UInt, 576 ULong, 577 ULongLong, 578 UInt128, // __uint128_t 579 580 Char_S, // This is 'char' for targets where char is signed. 581 SChar, // This is explicitly qualified signed char. 582 WChar, // This is 'wchar_t' for C++. 583 Short, 584 Int, 585 Long, 586 LongLong, 587 Int128, // __int128_t 588 589 Float, Double, LongDouble, 590 591 NullPtr, // This is the type of C++0x 'nullptr'. 592 593 Overload, // This represents the type of an overloaded function declaration. 594 Dependent, // This represents the type of a type-dependent expression. 595 596 UndeducedAuto, // In C++0x, this represents the type of an auto variable 597 // that has not been deduced yet. 598 ObjCId, // This represents the ObjC 'id' type. 599 ObjCClass // This represents the ObjC 'Class' type. 600 }; 601private: 602 Kind TypeKind; 603public: 604 BuiltinType(Kind K) 605 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent)), 606 TypeKind(K) {} 607 608 Kind getKind() const { return TypeKind; } 609 const char *getName(const LangOptions &LO) const; 610 611 virtual void getAsStringInternal(std::string &InnerString, 612 const PrintingPolicy &Policy) const; 613 614 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 615 static bool classof(const BuiltinType *) { return true; } 616}; 617 618/// FixedWidthIntType - Used for arbitrary width types that we either don't 619/// want to or can't map to named integer types. These always have a lower 620/// integer rank than builtin types of the same width. 621class FixedWidthIntType : public Type { 622private: 623 unsigned Width; 624 bool Signed; 625public: 626 FixedWidthIntType(unsigned W, bool S) : Type(FixedWidthInt, QualType(), false), 627 Width(W), Signed(S) {} 628 629 unsigned getWidth() const { return Width; } 630 bool isSigned() const { return Signed; } 631 const char *getName() const; 632 633 virtual void getAsStringInternal(std::string &InnerString, 634 const PrintingPolicy &Policy) const; 635 636 static bool classof(const Type *T) { return T->getTypeClass() == FixedWidthInt; } 637 static bool classof(const FixedWidthIntType *) { return true; } 638}; 639 640/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 641/// types (_Complex float etc) as well as the GCC integer complex extensions. 642/// 643class ComplexType : public Type, public llvm::FoldingSetNode { 644 QualType ElementType; 645 ComplexType(QualType Element, QualType CanonicalPtr) : 646 Type(Complex, CanonicalPtr, Element->isDependentType()), 647 ElementType(Element) { 648 } 649 friend class ASTContext; // ASTContext creates these. 650public: 651 QualType getElementType() const { return ElementType; } 652 653 virtual void getAsStringInternal(std::string &InnerString, 654 const PrintingPolicy &Policy) const; 655 656 void Profile(llvm::FoldingSetNodeID &ID) { 657 Profile(ID, getElementType()); 658 } 659 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 660 ID.AddPointer(Element.getAsOpaquePtr()); 661 } 662 663 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 664 static bool classof(const ComplexType *) { return true; } 665}; 666 667/// PointerType - C99 6.7.5.1 - Pointer Declarators. 668/// 669class PointerType : public Type, public llvm::FoldingSetNode { 670 QualType PointeeType; 671 672 PointerType(QualType Pointee, QualType CanonicalPtr) : 673 Type(Pointer, CanonicalPtr, Pointee->isDependentType()), PointeeType(Pointee) { 674 } 675 friend class ASTContext; // ASTContext creates these. 676public: 677 678 virtual void getAsStringInternal(std::string &InnerString, 679 const PrintingPolicy &Policy) const; 680 681 QualType getPointeeType() const { return PointeeType; } 682 683 void Profile(llvm::FoldingSetNodeID &ID) { 684 Profile(ID, getPointeeType()); 685 } 686 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 687 ID.AddPointer(Pointee.getAsOpaquePtr()); 688 } 689 690 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 691 static bool classof(const PointerType *) { return true; } 692}; 693 694/// BlockPointerType - pointer to a block type. 695/// This type is to represent types syntactically represented as 696/// "void (^)(int)", etc. Pointee is required to always be a function type. 697/// 698class BlockPointerType : public Type, public llvm::FoldingSetNode { 699 QualType PointeeType; // Block is some kind of pointer type 700 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 701 Type(BlockPointer, CanonicalCls, Pointee->isDependentType()), 702 PointeeType(Pointee) { 703 } 704 friend class ASTContext; // ASTContext creates these. 705public: 706 707 // Get the pointee type. Pointee is required to always be a function type. 708 QualType getPointeeType() const { return PointeeType; } 709 710 virtual void getAsStringInternal(std::string &InnerString, 711 const PrintingPolicy &Policy) const; 712 713 void Profile(llvm::FoldingSetNodeID &ID) { 714 Profile(ID, getPointeeType()); 715 } 716 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 717 ID.AddPointer(Pointee.getAsOpaquePtr()); 718 } 719 720 static bool classof(const Type *T) { 721 return T->getTypeClass() == BlockPointer; 722 } 723 static bool classof(const BlockPointerType *) { return true; } 724}; 725 726/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 727/// 728class ReferenceType : public Type, public llvm::FoldingSetNode { 729 QualType PointeeType; 730 731protected: 732 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef) : 733 Type(tc, CanonicalRef, Referencee->isDependentType()), 734 PointeeType(Referencee) { 735 } 736public: 737 QualType getPointeeType() const { return PointeeType; } 738 739 void Profile(llvm::FoldingSetNodeID &ID) { 740 Profile(ID, getPointeeType()); 741 } 742 static void Profile(llvm::FoldingSetNodeID &ID, QualType Referencee) { 743 ID.AddPointer(Referencee.getAsOpaquePtr()); 744 } 745 746 static bool classof(const Type *T) { 747 return T->getTypeClass() == LValueReference || 748 T->getTypeClass() == RValueReference; 749 } 750 static bool classof(const ReferenceType *) { return true; } 751}; 752 753/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 754/// 755class LValueReferenceType : public ReferenceType { 756 LValueReferenceType(QualType Referencee, QualType CanonicalRef) : 757 ReferenceType(LValueReference, Referencee, CanonicalRef) { 758 } 759 friend class ASTContext; // ASTContext creates these 760public: 761 virtual void getAsStringInternal(std::string &InnerString, 762 const PrintingPolicy &Policy) const; 763 764 static bool classof(const Type *T) { 765 return T->getTypeClass() == LValueReference; 766 } 767 static bool classof(const LValueReferenceType *) { return true; } 768}; 769 770/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 771/// 772class RValueReferenceType : public ReferenceType { 773 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 774 ReferenceType(RValueReference, Referencee, CanonicalRef) { 775 } 776 friend class ASTContext; // ASTContext creates these 777public: 778 virtual void getAsStringInternal(std::string &InnerString, 779 const PrintingPolicy &Policy) const; 780 781 static bool classof(const Type *T) { 782 return T->getTypeClass() == RValueReference; 783 } 784 static bool classof(const RValueReferenceType *) { return true; } 785}; 786 787/// MemberPointerType - C++ 8.3.3 - Pointers to members 788/// 789class MemberPointerType : public Type, public llvm::FoldingSetNode { 790 QualType PointeeType; 791 /// The class of which the pointee is a member. Must ultimately be a 792 /// RecordType, but could be a typedef or a template parameter too. 793 const Type *Class; 794 795 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 796 Type(MemberPointer, CanonicalPtr, 797 Cls->isDependentType() || Pointee->isDependentType()), 798 PointeeType(Pointee), Class(Cls) { 799 } 800 friend class ASTContext; // ASTContext creates these. 801public: 802 803 QualType getPointeeType() const { return PointeeType; } 804 805 const Type *getClass() const { return Class; } 806 807 virtual void getAsStringInternal(std::string &InnerString, 808 const PrintingPolicy &Policy) const; 809 810 void Profile(llvm::FoldingSetNodeID &ID) { 811 Profile(ID, getPointeeType(), getClass()); 812 } 813 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 814 const Type *Class) { 815 ID.AddPointer(Pointee.getAsOpaquePtr()); 816 ID.AddPointer(Class); 817 } 818 819 static bool classof(const Type *T) { 820 return T->getTypeClass() == MemberPointer; 821 } 822 static bool classof(const MemberPointerType *) { return true; } 823}; 824 825/// ArrayType - C99 6.7.5.2 - Array Declarators. 826/// 827class ArrayType : public Type, public llvm::FoldingSetNode { 828public: 829 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 830 /// an array with a static size (e.g. int X[static 4]), or an array 831 /// with a star size (e.g. int X[*]). 832 /// 'static' is only allowed on function parameters. 833 enum ArraySizeModifier { 834 Normal, Static, Star 835 }; 836private: 837 /// ElementType - The element type of the array. 838 QualType ElementType; 839 840 // NOTE: VC++ treats enums as signed, avoid using the ArraySizeModifier enum 841 /// NOTE: These fields are packed into the bitfields space in the Type class. 842 unsigned SizeModifier : 2; 843 844 /// IndexTypeQuals - Capture qualifiers in declarations like: 845 /// 'int X[static restrict 4]'. For function parameters only. 846 unsigned IndexTypeQuals : 3; 847 848protected: 849 // C++ [temp.dep.type]p1: 850 // A type is dependent if it is... 851 // - an array type constructed from any dependent type or whose 852 // size is specified by a constant expression that is 853 // value-dependent, 854 ArrayType(TypeClass tc, QualType et, QualType can, 855 ArraySizeModifier sm, unsigned tq) 856 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray), 857 ElementType(et), SizeModifier(sm), IndexTypeQuals(tq) {} 858 859 friend class ASTContext; // ASTContext creates these. 860public: 861 QualType getElementType() const { return ElementType; } 862 ArraySizeModifier getSizeModifier() const { 863 return ArraySizeModifier(SizeModifier); 864 } 865 unsigned getIndexTypeQualifier() const { return IndexTypeQuals; } 866 867 static bool classof(const Type *T) { 868 return T->getTypeClass() == ConstantArray || 869 T->getTypeClass() == ConstantArrayWithExpr || 870 T->getTypeClass() == ConstantArrayWithoutExpr || 871 T->getTypeClass() == VariableArray || 872 T->getTypeClass() == IncompleteArray || 873 T->getTypeClass() == DependentSizedArray; 874 } 875 static bool classof(const ArrayType *) { return true; } 876}; 877 878/// ConstantArrayType - This class represents the canonical version of 879/// C arrays with a specified constant size. For example, the canonical 880/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 881/// type is 'int' and the size is 404. 882class ConstantArrayType : public ArrayType { 883 llvm::APInt Size; // Allows us to unique the type. 884 885 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 886 ArraySizeModifier sm, unsigned tq) 887 : ArrayType(ConstantArray, et, can, sm, tq), 888 Size(size) {} 889protected: 890 ConstantArrayType(TypeClass tc, QualType et, QualType can, 891 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 892 : ArrayType(tc, et, can, sm, tq), Size(size) {} 893 friend class ASTContext; // ASTContext creates these. 894public: 895 const llvm::APInt &getSize() const { return Size; } 896 virtual void getAsStringInternal(std::string &InnerString, 897 const PrintingPolicy &Policy) const; 898 899 void Profile(llvm::FoldingSetNodeID &ID) { 900 Profile(ID, getElementType(), getSize(), 901 getSizeModifier(), getIndexTypeQualifier()); 902 } 903 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 904 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 905 unsigned TypeQuals) { 906 ID.AddPointer(ET.getAsOpaquePtr()); 907 ID.AddInteger(ArraySize.getZExtValue()); 908 ID.AddInteger(SizeMod); 909 ID.AddInteger(TypeQuals); 910 } 911 static bool classof(const Type *T) { 912 return T->getTypeClass() == ConstantArray || 913 T->getTypeClass() == ConstantArrayWithExpr || 914 T->getTypeClass() == ConstantArrayWithoutExpr; 915 } 916 static bool classof(const ConstantArrayType *) { return true; } 917}; 918 919/// ConstantArrayWithExprType - This class represents C arrays with a 920/// constant size specified by means of an integer constant expression. 921/// For example 'int A[sizeof(int)]' has ConstantArrayWithExprType where 922/// the element type is 'int' and the size expression is 'sizeof(int)'. 923/// These types are non-canonical. 924class ConstantArrayWithExprType : public ConstantArrayType { 925 /// SizeExpr - The ICE occurring in the concrete syntax. 926 Expr *SizeExpr; 927 /// Brackets - The left and right array brackets. 928 SourceRange Brackets; 929 930 ConstantArrayWithExprType(QualType et, QualType can, 931 const llvm::APInt &size, Expr *e, 932 ArraySizeModifier sm, unsigned tq, 933 SourceRange brackets) 934 : ConstantArrayType(ConstantArrayWithExpr, et, can, size, sm, tq), 935 SizeExpr(e), Brackets(brackets) {} 936 friend class ASTContext; // ASTContext creates these. 937 virtual void Destroy(ASTContext& C); 938 939public: 940 Expr *getSizeExpr() const { return SizeExpr; } 941 SourceRange getBracketsRange() const { return Brackets; } 942 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 943 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 944 945 virtual void getAsStringInternal(std::string &InnerString, 946 const PrintingPolicy &Policy) const; 947 948 static bool classof(const Type *T) { 949 return T->getTypeClass() == ConstantArrayWithExpr; 950 } 951 static bool classof(const ConstantArrayWithExprType *) { return true; } 952 953 void Profile(llvm::FoldingSetNodeID &ID) { 954 assert(0 && "Cannot unique ConstantArrayWithExprTypes."); 955 } 956}; 957 958/// ConstantArrayWithoutExprType - This class represents C arrays with a 959/// constant size that was not specified by an integer constant expression, 960/// but inferred by static semantics. 961/// For example 'int A[] = { 0, 1, 2 }' has ConstantArrayWithoutExprType. 962/// These types are non-canonical: the corresponding canonical type, 963/// having the size specified in an APInt object, is a ConstantArrayType. 964class ConstantArrayWithoutExprType : public ConstantArrayType { 965 966 ConstantArrayWithoutExprType(QualType et, QualType can, 967 const llvm::APInt &size, 968 ArraySizeModifier sm, unsigned tq) 969 : ConstantArrayType(ConstantArrayWithoutExpr, et, can, size, sm, tq) {} 970 friend class ASTContext; // ASTContext creates these. 971 972public: 973 virtual void getAsStringInternal(std::string &InnerString, 974 const PrintingPolicy &Policy) const; 975 976 static bool classof(const Type *T) { 977 return T->getTypeClass() == ConstantArrayWithoutExpr; 978 } 979 static bool classof(const ConstantArrayWithoutExprType *) { return true; } 980 981 void Profile(llvm::FoldingSetNodeID &ID) { 982 assert(0 && "Cannot unique ConstantArrayWithoutExprTypes."); 983 } 984}; 985 986/// IncompleteArrayType - This class represents C arrays with an unspecified 987/// size. For example 'int A[]' has an IncompleteArrayType where the element 988/// type is 'int' and the size is unspecified. 989class IncompleteArrayType : public ArrayType { 990 991 IncompleteArrayType(QualType et, QualType can, 992 ArraySizeModifier sm, unsigned tq) 993 : ArrayType(IncompleteArray, et, can, sm, tq) {} 994 friend class ASTContext; // ASTContext creates these. 995public: 996 virtual void getAsStringInternal(std::string &InnerString, 997 const PrintingPolicy &Policy) const; 998 999 static bool classof(const Type *T) { 1000 return T->getTypeClass() == IncompleteArray; 1001 } 1002 static bool classof(const IncompleteArrayType *) { return true; } 1003 1004 friend class StmtIteratorBase; 1005 1006 void Profile(llvm::FoldingSetNodeID &ID) { 1007 Profile(ID, getElementType(), getSizeModifier(), getIndexTypeQualifier()); 1008 } 1009 1010 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1011 ArraySizeModifier SizeMod, unsigned TypeQuals) { 1012 ID.AddPointer(ET.getAsOpaquePtr()); 1013 ID.AddInteger(SizeMod); 1014 ID.AddInteger(TypeQuals); 1015 } 1016}; 1017 1018/// VariableArrayType - This class represents C arrays with a specified size 1019/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 1020/// Since the size expression is an arbitrary expression, we store it as such. 1021/// 1022/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 1023/// should not be: two lexically equivalent variable array types could mean 1024/// different things, for example, these variables do not have the same type 1025/// dynamically: 1026/// 1027/// void foo(int x) { 1028/// int Y[x]; 1029/// ++x; 1030/// int Z[x]; 1031/// } 1032/// 1033class VariableArrayType : public ArrayType { 1034 /// SizeExpr - An assignment expression. VLA's are only permitted within 1035 /// a function block. 1036 Stmt *SizeExpr; 1037 /// Brackets - The left and right array brackets. 1038 SourceRange Brackets; 1039 1040 VariableArrayType(QualType et, QualType can, Expr *e, 1041 ArraySizeModifier sm, unsigned tq, 1042 SourceRange brackets) 1043 : ArrayType(VariableArray, et, can, sm, tq), 1044 SizeExpr((Stmt*) e), Brackets(brackets) {} 1045 friend class ASTContext; // ASTContext creates these. 1046 virtual void Destroy(ASTContext& C); 1047 1048public: 1049 Expr *getSizeExpr() const { 1050 // We use C-style casts instead of cast<> here because we do not wish 1051 // to have a dependency of Type.h on Stmt.h/Expr.h. 1052 return (Expr*) SizeExpr; 1053 } 1054 SourceRange getBracketsRange() const { return Brackets; } 1055 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1056 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1057 1058 virtual void getAsStringInternal(std::string &InnerString, 1059 const PrintingPolicy &Policy) const; 1060 1061 static bool classof(const Type *T) { 1062 return T->getTypeClass() == VariableArray; 1063 } 1064 static bool classof(const VariableArrayType *) { return true; } 1065 1066 friend class StmtIteratorBase; 1067 1068 void Profile(llvm::FoldingSetNodeID &ID) { 1069 assert(0 && "Cannnot unique VariableArrayTypes."); 1070 } 1071}; 1072 1073/// DependentSizedArrayType - This type represents an array type in 1074/// C++ whose size is a value-dependent expression. For example: 1075/// @code 1076/// template<typename T, int Size> 1077/// class array { 1078/// T data[Size]; 1079/// }; 1080/// @endcode 1081/// For these types, we won't actually know what the array bound is 1082/// until template instantiation occurs, at which point this will 1083/// become either a ConstantArrayType or a VariableArrayType. 1084class DependentSizedArrayType : public ArrayType { 1085 /// SizeExpr - An assignment expression that will instantiate to the 1086 /// size of the array. 1087 Stmt *SizeExpr; 1088 /// Brackets - The left and right array brackets. 1089 SourceRange Brackets; 1090 1091 DependentSizedArrayType(QualType et, QualType can, Expr *e, 1092 ArraySizeModifier sm, unsigned tq, 1093 SourceRange brackets) 1094 : ArrayType(DependentSizedArray, et, can, sm, tq), 1095 SizeExpr((Stmt*) e), Brackets(brackets) {} 1096 friend class ASTContext; // ASTContext creates these. 1097 virtual void Destroy(ASTContext& C); 1098 1099public: 1100 Expr *getSizeExpr() const { 1101 // We use C-style casts instead of cast<> here because we do not wish 1102 // to have a dependency of Type.h on Stmt.h/Expr.h. 1103 return (Expr*) SizeExpr; 1104 } 1105 SourceRange getBracketsRange() const { return Brackets; } 1106 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1107 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1108 1109 virtual void getAsStringInternal(std::string &InnerString, 1110 const PrintingPolicy &Policy) const; 1111 1112 static bool classof(const Type *T) { 1113 return T->getTypeClass() == DependentSizedArray; 1114 } 1115 static bool classof(const DependentSizedArrayType *) { return true; } 1116 1117 friend class StmtIteratorBase; 1118 1119 void Profile(llvm::FoldingSetNodeID &ID) { 1120 assert(0 && "Cannnot unique DependentSizedArrayTypes."); 1121 } 1122}; 1123 1124/// DependentSizedExtVectorType - This type represent an extended vector type 1125/// where either the type or size is dependent. For example: 1126/// @code 1127/// template<typename T, int Size> 1128/// class vector { 1129/// typedef T __attribute__((ext_vector_type(Size))) type; 1130/// } 1131/// @endcode 1132class DependentSizedExtVectorType : public Type { 1133 Expr *SizeExpr; 1134 /// ElementType - The element type of the array. 1135 QualType ElementType; 1136 SourceLocation loc; 1137 1138 DependentSizedExtVectorType(QualType ElementType, QualType can, 1139 Expr *SizeExpr, SourceLocation loc) 1140 : Type (DependentSizedExtVector, can, true), 1141 SizeExpr(SizeExpr), ElementType(ElementType), loc(loc) {} 1142 friend class ASTContext; 1143 virtual void Destroy(ASTContext& C); 1144 1145public: 1146 const Expr *getSizeExpr() const { return SizeExpr; } 1147 QualType getElementType() const { return ElementType; } 1148 SourceLocation getAttributeLoc() const { return loc; } 1149 1150 virtual void getAsStringInternal(std::string &InnerString, 1151 const PrintingPolicy &Policy) const; 1152 1153 static bool classof(const Type *T) { 1154 return T->getTypeClass() == DependentSizedExtVector; 1155 } 1156 static bool classof(const DependentSizedExtVectorType *) { return true; } 1157}; 1158 1159 1160/// VectorType - GCC generic vector type. This type is created using 1161/// __attribute__((vector_size(n)), where "n" specifies the vector size in 1162/// bytes. Since the constructor takes the number of vector elements, the 1163/// client is responsible for converting the size into the number of elements. 1164class VectorType : public Type, public llvm::FoldingSetNode { 1165protected: 1166 /// ElementType - The element type of the vector. 1167 QualType ElementType; 1168 1169 /// NumElements - The number of elements in the vector. 1170 unsigned NumElements; 1171 1172 VectorType(QualType vecType, unsigned nElements, QualType canonType) : 1173 Type(Vector, canonType, vecType->isDependentType()), 1174 ElementType(vecType), NumElements(nElements) {} 1175 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 1176 QualType canonType) 1177 : Type(tc, canonType, vecType->isDependentType()), ElementType(vecType), 1178 NumElements(nElements) {} 1179 friend class ASTContext; // ASTContext creates these. 1180public: 1181 1182 QualType getElementType() const { return ElementType; } 1183 unsigned getNumElements() const { return NumElements; } 1184 1185 virtual void getAsStringInternal(std::string &InnerString, 1186 const PrintingPolicy &Policy) const; 1187 1188 void Profile(llvm::FoldingSetNodeID &ID) { 1189 Profile(ID, getElementType(), getNumElements(), getTypeClass()); 1190 } 1191 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 1192 unsigned NumElements, TypeClass TypeClass) { 1193 ID.AddPointer(ElementType.getAsOpaquePtr()); 1194 ID.AddInteger(NumElements); 1195 ID.AddInteger(TypeClass); 1196 } 1197 static bool classof(const Type *T) { 1198 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 1199 } 1200 static bool classof(const VectorType *) { return true; } 1201}; 1202 1203/// ExtVectorType - Extended vector type. This type is created using 1204/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 1205/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 1206/// class enables syntactic extensions, like Vector Components for accessing 1207/// points, colors, and textures (modeled after OpenGL Shading Language). 1208class ExtVectorType : public VectorType { 1209 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 1210 VectorType(ExtVector, vecType, nElements, canonType) {} 1211 friend class ASTContext; // ASTContext creates these. 1212public: 1213 static int getPointAccessorIdx(char c) { 1214 switch (c) { 1215 default: return -1; 1216 case 'x': return 0; 1217 case 'y': return 1; 1218 case 'z': return 2; 1219 case 'w': return 3; 1220 } 1221 } 1222 static int getNumericAccessorIdx(char c) { 1223 switch (c) { 1224 default: return -1; 1225 case '0': return 0; 1226 case '1': return 1; 1227 case '2': return 2; 1228 case '3': return 3; 1229 case '4': return 4; 1230 case '5': return 5; 1231 case '6': return 6; 1232 case '7': return 7; 1233 case '8': return 8; 1234 case '9': return 9; 1235 case 'A': 1236 case 'a': return 10; 1237 case 'B': 1238 case 'b': return 11; 1239 case 'C': 1240 case 'c': return 12; 1241 case 'D': 1242 case 'd': return 13; 1243 case 'E': 1244 case 'e': return 14; 1245 case 'F': 1246 case 'f': return 15; 1247 } 1248 } 1249 1250 static int getAccessorIdx(char c) { 1251 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 1252 return getNumericAccessorIdx(c); 1253 } 1254 1255 bool isAccessorWithinNumElements(char c) const { 1256 if (int idx = getAccessorIdx(c)+1) 1257 return unsigned(idx-1) < NumElements; 1258 return false; 1259 } 1260 virtual void getAsStringInternal(std::string &InnerString, 1261 const PrintingPolicy &Policy) const; 1262 1263 static bool classof(const Type *T) { 1264 return T->getTypeClass() == ExtVector; 1265 } 1266 static bool classof(const ExtVectorType *) { return true; } 1267}; 1268 1269/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 1270/// class of FunctionNoProtoType and FunctionProtoType. 1271/// 1272class FunctionType : public Type { 1273 /// SubClassData - This field is owned by the subclass, put here to pack 1274 /// tightly with the ivars in Type. 1275 bool SubClassData : 1; 1276 1277 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1278 /// other bitfields. 1279 /// The qualifiers are part of FunctionProtoType because... 1280 /// 1281 /// C++ 8.3.5p4: The return type, the parameter type list and the 1282 /// cv-qualifier-seq, [...], are part of the function type. 1283 /// 1284 unsigned TypeQuals : 3; 1285 1286 // The type returned by the function. 1287 QualType ResultType; 1288protected: 1289 FunctionType(TypeClass tc, QualType res, bool SubclassInfo, 1290 unsigned typeQuals, QualType Canonical, bool Dependent) 1291 : Type(tc, Canonical, Dependent), 1292 SubClassData(SubclassInfo), TypeQuals(typeQuals), ResultType(res) {} 1293 bool getSubClassData() const { return SubClassData; } 1294 unsigned getTypeQuals() const { return TypeQuals; } 1295public: 1296 1297 QualType getResultType() const { return ResultType; } 1298 1299 1300 static bool classof(const Type *T) { 1301 return T->getTypeClass() == FunctionNoProto || 1302 T->getTypeClass() == FunctionProto; 1303 } 1304 static bool classof(const FunctionType *) { return true; } 1305}; 1306 1307/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 1308/// no information available about its arguments. 1309class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 1310 FunctionNoProtoType(QualType Result, QualType Canonical) 1311 : FunctionType(FunctionNoProto, Result, false, 0, Canonical, 1312 /*Dependent=*/false) {} 1313 friend class ASTContext; // ASTContext creates these. 1314public: 1315 // No additional state past what FunctionType provides. 1316 1317 virtual void getAsStringInternal(std::string &InnerString, 1318 const PrintingPolicy &Policy) const; 1319 1320 void Profile(llvm::FoldingSetNodeID &ID) { 1321 Profile(ID, getResultType()); 1322 } 1323 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType) { 1324 ID.AddPointer(ResultType.getAsOpaquePtr()); 1325 } 1326 1327 static bool classof(const Type *T) { 1328 return T->getTypeClass() == FunctionNoProto; 1329 } 1330 static bool classof(const FunctionNoProtoType *) { return true; } 1331}; 1332 1333/// FunctionProtoType - Represents a prototype with argument type info, e.g. 1334/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 1335/// arguments, not as having a single void argument. Such a type can have an 1336/// exception specification, but this specification is not part of the canonical 1337/// type. 1338class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 1339 /// hasAnyDependentType - Determine whether there are any dependent 1340 /// types within the arguments passed in. 1341 static bool hasAnyDependentType(const QualType *ArgArray, unsigned numArgs) { 1342 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 1343 if (ArgArray[Idx]->isDependentType()) 1344 return true; 1345 1346 return false; 1347 } 1348 1349 FunctionProtoType(QualType Result, const QualType *ArgArray, unsigned numArgs, 1350 bool isVariadic, unsigned typeQuals, bool hasExs, 1351 bool hasAnyExs, const QualType *ExArray, 1352 unsigned numExs, QualType Canonical) 1353 : FunctionType(FunctionProto, Result, isVariadic, typeQuals, Canonical, 1354 (Result->isDependentType() || 1355 hasAnyDependentType(ArgArray, numArgs))), 1356 NumArgs(numArgs), NumExceptions(numExs), HasExceptionSpec(hasExs), 1357 AnyExceptionSpec(hasAnyExs) { 1358 // Fill in the trailing argument array. 1359 QualType *ArgInfo = reinterpret_cast<QualType*>(this+1); 1360 for (unsigned i = 0; i != numArgs; ++i) 1361 ArgInfo[i] = ArgArray[i]; 1362 // Fill in the exception array. 1363 QualType *Ex = ArgInfo + numArgs; 1364 for (unsigned i = 0; i != numExs; ++i) 1365 Ex[i] = ExArray[i]; 1366 } 1367 1368 /// NumArgs - The number of arguments this function has, not counting '...'. 1369 unsigned NumArgs : 20; 1370 1371 /// NumExceptions - The number of types in the exception spec, if any. 1372 unsigned NumExceptions : 10; 1373 1374 /// HasExceptionSpec - Whether this function has an exception spec at all. 1375 bool HasExceptionSpec : 1; 1376 1377 /// AnyExceptionSpec - Whether this function has a throw(...) spec. 1378 bool AnyExceptionSpec : 1; 1379 1380 /// ArgInfo - There is an variable size array after the class in memory that 1381 /// holds the argument types. 1382 1383 /// Exceptions - There is another variable size array after ArgInfo that 1384 /// holds the exception types. 1385 1386 friend class ASTContext; // ASTContext creates these. 1387 1388public: 1389 unsigned getNumArgs() const { return NumArgs; } 1390 QualType getArgType(unsigned i) const { 1391 assert(i < NumArgs && "Invalid argument number!"); 1392 return arg_type_begin()[i]; 1393 } 1394 1395 bool hasExceptionSpec() const { return HasExceptionSpec; } 1396 bool hasAnyExceptionSpec() const { return AnyExceptionSpec; } 1397 unsigned getNumExceptions() const { return NumExceptions; } 1398 QualType getExceptionType(unsigned i) const { 1399 assert(i < NumExceptions && "Invalid exception number!"); 1400 return exception_begin()[i]; 1401 } 1402 bool hasEmptyExceptionSpec() const { 1403 return hasExceptionSpec() && !hasAnyExceptionSpec() && 1404 getNumExceptions() == 0; 1405 } 1406 1407 bool isVariadic() const { return getSubClassData(); } 1408 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 1409 1410 typedef const QualType *arg_type_iterator; 1411 arg_type_iterator arg_type_begin() const { 1412 return reinterpret_cast<const QualType *>(this+1); 1413 } 1414 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 1415 1416 typedef const QualType *exception_iterator; 1417 exception_iterator exception_begin() const { 1418 // exceptions begin where arguments end 1419 return arg_type_end(); 1420 } 1421 exception_iterator exception_end() const { 1422 return exception_begin() + NumExceptions; 1423 } 1424 1425 virtual void getAsStringInternal(std::string &InnerString, 1426 const PrintingPolicy &Policy) const; 1427 1428 static bool classof(const Type *T) { 1429 return T->getTypeClass() == FunctionProto; 1430 } 1431 static bool classof(const FunctionProtoType *) { return true; } 1432 1433 void Profile(llvm::FoldingSetNodeID &ID); 1434 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 1435 arg_type_iterator ArgTys, unsigned NumArgs, 1436 bool isVariadic, unsigned TypeQuals, 1437 bool hasExceptionSpec, bool anyExceptionSpec, 1438 unsigned NumExceptions, exception_iterator Exs); 1439}; 1440 1441 1442class TypedefType : public Type { 1443 TypedefDecl *Decl; 1444protected: 1445 TypedefType(TypeClass tc, TypedefDecl *D, QualType can) 1446 : Type(tc, can, can->isDependentType()), Decl(D) { 1447 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1448 } 1449 friend class ASTContext; // ASTContext creates these. 1450public: 1451 1452 TypedefDecl *getDecl() const { return Decl; } 1453 1454 /// LookThroughTypedefs - Return the ultimate type this typedef corresponds to 1455 /// potentially looking through *all* consecutive typedefs. This returns the 1456 /// sum of the type qualifiers, so if you have: 1457 /// typedef const int A; 1458 /// typedef volatile A B; 1459 /// looking through the typedefs for B will give you "const volatile A". 1460 QualType LookThroughTypedefs() const; 1461 1462 virtual void getAsStringInternal(std::string &InnerString, 1463 const PrintingPolicy &Policy) const; 1464 1465 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 1466 static bool classof(const TypedefType *) { return true; } 1467}; 1468 1469/// TypeOfExprType (GCC extension). 1470class TypeOfExprType : public Type { 1471 Expr *TOExpr; 1472 TypeOfExprType(Expr *E, QualType can = QualType()); 1473 friend class ASTContext; // ASTContext creates these. 1474public: 1475 Expr *getUnderlyingExpr() const { return TOExpr; } 1476 1477 virtual void getAsStringInternal(std::string &InnerString, 1478 const PrintingPolicy &Policy) const; 1479 1480 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 1481 static bool classof(const TypeOfExprType *) { return true; } 1482}; 1483 1484/// TypeOfType (GCC extension). 1485class TypeOfType : public Type { 1486 QualType TOType; 1487 TypeOfType(QualType T, QualType can) 1488 : Type(TypeOf, can, T->isDependentType()), TOType(T) { 1489 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1490 } 1491 friend class ASTContext; // ASTContext creates these. 1492public: 1493 QualType getUnderlyingType() const { return TOType; } 1494 1495 virtual void getAsStringInternal(std::string &InnerString, 1496 const PrintingPolicy &Policy) const; 1497 1498 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 1499 static bool classof(const TypeOfType *) { return true; } 1500}; 1501 1502/// DecltypeType (C++0x) 1503class DecltypeType : public Type { 1504 Expr *E; 1505 1506 // FIXME: We could get rid of UnderlyingType if we wanted to: We would have to 1507 // Move getDesugaredType to ASTContext so that it can call getDecltypeForExpr 1508 // from it. 1509 QualType UnderlyingType; 1510 1511 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 1512 friend class ASTContext; // ASTContext creates these. 1513public: 1514 Expr *getUnderlyingExpr() const { return E; } 1515 QualType getUnderlyingType() const { return UnderlyingType; } 1516 1517 virtual void getAsStringInternal(std::string &InnerString, 1518 const PrintingPolicy &Policy) const; 1519 1520 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 1521 static bool classof(const DecltypeType *) { return true; } 1522}; 1523 1524class TagType : public Type { 1525 /// Stores the TagDecl associated with this type. The decl will 1526 /// point to the TagDecl that actually defines the entity (or is a 1527 /// definition in progress), if there is such a definition. The 1528 /// single-bit value will be non-zero when this tag is in the 1529 /// process of being defined. 1530 mutable llvm::PointerIntPair<TagDecl *, 1> decl; 1531 friend class ASTContext; 1532 friend class TagDecl; 1533 1534protected: 1535 TagType(TypeClass TC, TagDecl *D, QualType can); 1536 1537public: 1538 TagDecl *getDecl() const { return decl.getPointer(); } 1539 1540 /// @brief Determines whether this type is in the process of being 1541 /// defined. 1542 bool isBeingDefined() const { return decl.getInt(); } 1543 void setBeingDefined(bool Def) { decl.setInt(Def? 1 : 0); } 1544 1545 virtual void getAsStringInternal(std::string &InnerString, 1546 const PrintingPolicy &Policy) const; 1547 1548 static bool classof(const Type *T) { 1549 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 1550 } 1551 static bool classof(const TagType *) { return true; } 1552 static bool classof(const RecordType *) { return true; } 1553 static bool classof(const EnumType *) { return true; } 1554}; 1555 1556/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 1557/// to detect TagType objects of structs/unions/classes. 1558class RecordType : public TagType { 1559protected: 1560 explicit RecordType(RecordDecl *D) 1561 : TagType(Record, reinterpret_cast<TagDecl*>(D), QualType()) { } 1562 explicit RecordType(TypeClass TC, RecordDecl *D) 1563 : TagType(TC, reinterpret_cast<TagDecl*>(D), QualType()) { } 1564 friend class ASTContext; // ASTContext creates these. 1565public: 1566 1567 RecordDecl *getDecl() const { 1568 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 1569 } 1570 1571 // FIXME: This predicate is a helper to QualType/Type. It needs to 1572 // recursively check all fields for const-ness. If any field is declared 1573 // const, it needs to return false. 1574 bool hasConstFields() const { return false; } 1575 1576 // FIXME: RecordType needs to check when it is created that all fields are in 1577 // the same address space, and return that. 1578 unsigned getAddressSpace() const { return 0; } 1579 1580 static bool classof(const TagType *T); 1581 static bool classof(const Type *T) { 1582 return isa<TagType>(T) && classof(cast<TagType>(T)); 1583 } 1584 static bool classof(const RecordType *) { return true; } 1585}; 1586 1587/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 1588/// to detect TagType objects of enums. 1589class EnumType : public TagType { 1590 explicit EnumType(EnumDecl *D) 1591 : TagType(Enum, reinterpret_cast<TagDecl*>(D), QualType()) { } 1592 friend class ASTContext; // ASTContext creates these. 1593public: 1594 1595 EnumDecl *getDecl() const { 1596 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 1597 } 1598 1599 static bool classof(const TagType *T); 1600 static bool classof(const Type *T) { 1601 return isa<TagType>(T) && classof(cast<TagType>(T)); 1602 } 1603 static bool classof(const EnumType *) { return true; } 1604}; 1605 1606class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 1607 unsigned Depth : 15; 1608 unsigned Index : 16; 1609 unsigned ParameterPack : 1; 1610 IdentifierInfo *Name; 1611 1612 TemplateTypeParmType(unsigned D, unsigned I, bool PP, IdentifierInfo *N, 1613 QualType Canon) 1614 : Type(TemplateTypeParm, Canon, /*Dependent=*/true), 1615 Depth(D), Index(I), ParameterPack(PP), Name(N) { } 1616 1617 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 1618 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true), 1619 Depth(D), Index(I), ParameterPack(PP), Name(0) { } 1620 1621 friend class ASTContext; // ASTContext creates these 1622 1623public: 1624 unsigned getDepth() const { return Depth; } 1625 unsigned getIndex() const { return Index; } 1626 bool isParameterPack() const { return ParameterPack; } 1627 IdentifierInfo *getName() const { return Name; } 1628 1629 virtual void getAsStringInternal(std::string &InnerString, 1630 const PrintingPolicy &Policy) const; 1631 1632 void Profile(llvm::FoldingSetNodeID &ID) { 1633 Profile(ID, Depth, Index, ParameterPack, Name); 1634 } 1635 1636 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 1637 unsigned Index, bool ParameterPack, 1638 IdentifierInfo *Name) { 1639 ID.AddInteger(Depth); 1640 ID.AddInteger(Index); 1641 ID.AddBoolean(ParameterPack); 1642 ID.AddPointer(Name); 1643 } 1644 1645 static bool classof(const Type *T) { 1646 return T->getTypeClass() == TemplateTypeParm; 1647 } 1648 static bool classof(const TemplateTypeParmType *T) { return true; } 1649}; 1650 1651/// \brief Represents the type of a template specialization as written 1652/// in the source code. 1653/// 1654/// Template specialization types represent the syntactic form of a 1655/// template-id that refers to a type, e.g., @c vector<int>. Some 1656/// template specialization types are syntactic sugar, whose canonical 1657/// type will point to some other type node that represents the 1658/// instantiation or class template specialization. For example, a 1659/// class template specialization type of @c vector<int> will refer to 1660/// a tag type for the instantiation 1661/// @c std::vector<int, std::allocator<int>>. 1662/// 1663/// Other template specialization types, for which the template name 1664/// is dependent, may be canonical types. These types are always 1665/// dependent. 1666class TemplateSpecializationType 1667 : public Type, public llvm::FoldingSetNode { 1668 1669 /// \brief The name of the template being specialized. 1670 TemplateName Template; 1671 1672 /// \brief - The number of template arguments named in this class 1673 /// template specialization. 1674 unsigned NumArgs; 1675 1676 TemplateSpecializationType(TemplateName T, 1677 const TemplateArgument *Args, 1678 unsigned NumArgs, QualType Canon); 1679 1680 virtual void Destroy(ASTContext& C); 1681 1682 friend class ASTContext; // ASTContext creates these 1683 1684public: 1685 /// \brief Determine whether any of the given template arguments are 1686 /// dependent. 1687 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 1688 unsigned NumArgs); 1689 1690 /// \brief Print a template argument list, including the '<' and '>' 1691 /// enclosing the template arguments. 1692 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 1693 unsigned NumArgs, 1694 const PrintingPolicy &Policy); 1695 1696 typedef const TemplateArgument * iterator; 1697 1698 iterator begin() const { return getArgs(); } 1699 iterator end() const; 1700 1701 /// \brief Retrieve the name of the template that we are specializing. 1702 TemplateName getTemplateName() const { return Template; } 1703 1704 /// \brief Retrieve the template arguments. 1705 const TemplateArgument *getArgs() const { 1706 return reinterpret_cast<const TemplateArgument *>(this + 1); 1707 } 1708 1709 /// \brief Retrieve the number of template arguments. 1710 unsigned getNumArgs() const { return NumArgs; } 1711 1712 /// \brief Retrieve a specific template argument as a type. 1713 /// \precondition @c isArgType(Arg) 1714 const TemplateArgument &getArg(unsigned Idx) const; 1715 1716 virtual void getAsStringInternal(std::string &InnerString, 1717 const PrintingPolicy &Policy) const; 1718 1719 void Profile(llvm::FoldingSetNodeID &ID) { 1720 Profile(ID, Template, getArgs(), NumArgs); 1721 } 1722 1723 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 1724 const TemplateArgument *Args, unsigned NumArgs); 1725 1726 static bool classof(const Type *T) { 1727 return T->getTypeClass() == TemplateSpecialization; 1728 } 1729 static bool classof(const TemplateSpecializationType *T) { return true; } 1730}; 1731 1732/// \brief Represents a type that was referred to via a qualified 1733/// name, e.g., N::M::type. 1734/// 1735/// This type is used to keep track of a type name as written in the 1736/// source code, including any nested-name-specifiers. The type itself 1737/// is always "sugar", used to express what was written in the source 1738/// code but containing no additional semantic information. 1739class QualifiedNameType : public Type, public llvm::FoldingSetNode { 1740 /// \brief The nested name specifier containing the qualifier. 1741 NestedNameSpecifier *NNS; 1742 1743 /// \brief The type that this qualified name refers to. 1744 QualType NamedType; 1745 1746 QualifiedNameType(NestedNameSpecifier *NNS, QualType NamedType, 1747 QualType CanonType) 1748 : Type(QualifiedName, CanonType, NamedType->isDependentType()), 1749 NNS(NNS), NamedType(NamedType) { } 1750 1751 friend class ASTContext; // ASTContext creates these 1752 1753public: 1754 /// \brief Retrieve the qualification on this type. 1755 NestedNameSpecifier *getQualifier() const { return NNS; } 1756 1757 /// \brief Retrieve the type named by the qualified-id. 1758 QualType getNamedType() const { return NamedType; } 1759 1760 virtual void getAsStringInternal(std::string &InnerString, 1761 const PrintingPolicy &Policy) const; 1762 1763 void Profile(llvm::FoldingSetNodeID &ID) { 1764 Profile(ID, NNS, NamedType); 1765 } 1766 1767 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 1768 QualType NamedType) { 1769 ID.AddPointer(NNS); 1770 NamedType.Profile(ID); 1771 } 1772 1773 static bool classof(const Type *T) { 1774 return T->getTypeClass() == QualifiedName; 1775 } 1776 static bool classof(const QualifiedNameType *T) { return true; } 1777}; 1778 1779/// \brief Represents a 'typename' specifier that names a type within 1780/// a dependent type, e.g., "typename T::type". 1781/// 1782/// TypenameType has a very similar structure to QualifiedNameType, 1783/// which also involves a nested-name-specifier following by a type, 1784/// and (FIXME!) both can even be prefixed by the 'typename' 1785/// keyword. However, the two types serve very different roles: 1786/// QualifiedNameType is a non-semantic type that serves only as sugar 1787/// to show how a particular type was written in the source 1788/// code. TypenameType, on the other hand, only occurs when the 1789/// nested-name-specifier is dependent, such that we cannot resolve 1790/// the actual type until after instantiation. 1791class TypenameType : public Type, public llvm::FoldingSetNode { 1792 /// \brief The nested name specifier containing the qualifier. 1793 NestedNameSpecifier *NNS; 1794 1795 typedef llvm::PointerUnion<const IdentifierInfo *, 1796 const TemplateSpecializationType *> NameType; 1797 1798 /// \brief The type that this typename specifier refers to. 1799 NameType Name; 1800 1801 TypenameType(NestedNameSpecifier *NNS, const IdentifierInfo *Name, 1802 QualType CanonType) 1803 : Type(Typename, CanonType, true), NNS(NNS), Name(Name) { 1804 assert(NNS->isDependent() && 1805 "TypenameType requires a dependent nested-name-specifier"); 1806 } 1807 1808 TypenameType(NestedNameSpecifier *NNS, const TemplateSpecializationType *Ty, 1809 QualType CanonType) 1810 : Type(Typename, CanonType, true), NNS(NNS), Name(Ty) { 1811 assert(NNS->isDependent() && 1812 "TypenameType requires a dependent nested-name-specifier"); 1813 } 1814 1815 friend class ASTContext; // ASTContext creates these 1816 1817public: 1818 /// \brief Retrieve the qualification on this type. 1819 NestedNameSpecifier *getQualifier() const { return NNS; } 1820 1821 /// \brief Retrieve the type named by the typename specifier as an 1822 /// identifier. 1823 /// 1824 /// This routine will return a non-NULL identifier pointer when the 1825 /// form of the original typename was terminated by an identifier, 1826 /// e.g., "typename T::type". 1827 const IdentifierInfo *getIdentifier() const { 1828 return Name.dyn_cast<const IdentifierInfo *>(); 1829 } 1830 1831 /// \brief Retrieve the type named by the typename specifier as a 1832 /// type specialization. 1833 const TemplateSpecializationType *getTemplateId() const { 1834 return Name.dyn_cast<const TemplateSpecializationType *>(); 1835 } 1836 1837 virtual void getAsStringInternal(std::string &InnerString, 1838 const PrintingPolicy &Policy) const; 1839 1840 void Profile(llvm::FoldingSetNodeID &ID) { 1841 Profile(ID, NNS, Name); 1842 } 1843 1844 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 1845 NameType Name) { 1846 ID.AddPointer(NNS); 1847 ID.AddPointer(Name.getOpaqueValue()); 1848 } 1849 1850 static bool classof(const Type *T) { 1851 return T->getTypeClass() == Typename; 1852 } 1853 static bool classof(const TypenameType *T) { return true; } 1854}; 1855 1856/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 1857/// object oriented design. They basically correspond to C++ classes. There 1858/// are two kinds of interface types, normal interfaces like "NSString" and 1859/// qualified interfaces, which are qualified with a protocol list like 1860/// "NSString<NSCopyable, NSAmazing>". Qualified interface types are instances 1861/// of ObjCQualifiedInterfaceType, which is a subclass of ObjCInterfaceType. 1862class ObjCInterfaceType : public Type { 1863 ObjCInterfaceDecl *Decl; 1864protected: 1865 ObjCInterfaceType(TypeClass tc, ObjCInterfaceDecl *D) : 1866 Type(tc, QualType(), /*Dependent=*/false), Decl(D) { } 1867 friend class ASTContext; // ASTContext creates these. 1868 1869 // FIXME: These can go away when we move ASTContext::canAssignObjCInterfaces 1870 // to this class (as a static helper). 1871 bool isObjCIdInterface() const; 1872 bool isObjCClassInterface() const; 1873public: 1874 1875 ObjCInterfaceDecl *getDecl() const { return Decl; } 1876 1877 /// qual_iterator and friends: this provides access to the (potentially empty) 1878 /// list of protocols qualifying this interface. If this is an instance of 1879 /// ObjCQualifiedInterfaceType it returns the list, otherwise it returns an 1880 /// empty list if there are no qualifying protocols. 1881 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 1882 inline qual_iterator qual_begin() const; 1883 inline qual_iterator qual_end() const; 1884 bool qual_empty() const { return getTypeClass() != ObjCQualifiedInterface; } 1885 1886 /// getNumProtocols - Return the number of qualifying protocols in this 1887 /// interface type, or 0 if there are none. 1888 inline unsigned getNumProtocols() const; 1889 1890 virtual void getAsStringInternal(std::string &InnerString, 1891 const PrintingPolicy &Policy) const; 1892 static bool classof(const Type *T) { 1893 return T->getTypeClass() == ObjCInterface || 1894 T->getTypeClass() == ObjCQualifiedInterface; 1895 } 1896 static bool classof(const ObjCInterfaceType *) { return true; } 1897}; 1898 1899/// ObjCObjectPointerType - Used to represent 'id', 'Interface *', 'id <p>', 1900/// and 'Interface <p> *'. 1901/// 1902/// Duplicate protocols are removed and protocol list is canonicalized to be in 1903/// alphabetical order. 1904class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 1905 QualType PointeeType; // A builin or interface type. 1906 1907 // List of protocols for this protocol conforming object type 1908 // List is sorted on protocol name. No protocol is entered more than once. 1909 llvm::SmallVector<ObjCProtocolDecl*, 8> Protocols; 1910 1911 ObjCObjectPointerType(QualType T, ObjCProtocolDecl **Protos, unsigned NumP) : 1912 Type(ObjCObjectPointer, QualType(), /*Dependent=*/false), 1913 PointeeType(T), Protocols(Protos, Protos+NumP) { } 1914 friend class ASTContext; // ASTContext creates these. 1915 1916public: 1917 // Get the pointee type. Pointee will either be a built-in type (for 'id' and 1918 // 'Class') or will be an interface type (for user-defined types). 1919 // Note: Pointee can be a TypedefType whose canonical type is an interface. 1920 // Example: typedef NSObject T; T *var; 1921 QualType getPointeeType() const { return PointeeType; } 1922 1923 const ObjCInterfaceType *getInterfaceType() const { 1924 return PointeeType->getAsObjCInterfaceType(); 1925 } 1926 /// getInterfaceDecl - returns an interface decl for user-defined types. 1927 ObjCInterfaceDecl *getInterfaceDecl() const { 1928 return getInterfaceType() ? getInterfaceType()->getDecl() : 0; 1929 } 1930 /// isObjCIdType - true for "id". 1931 bool isObjCIdType() const { 1932 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCId) && 1933 !Protocols.size(); 1934 } 1935 /// isObjCClassType - true for "Class". 1936 bool isObjCClassType() const { 1937 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCClass) && 1938 !Protocols.size(); 1939 } 1940 /// isObjCQualifiedIdType - true for "id <p>". 1941 bool isObjCQualifiedIdType() const { 1942 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCId) && 1943 Protocols.size(); 1944 } 1945 /// isObjCQualifiedClassType - true for "Class <p>". 1946 bool isQualifiedClassType() const { 1947 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCClass) && 1948 Protocols.size(); 1949 } 1950 /// qual_iterator and friends: this provides access to the (potentially empty) 1951 /// list of protocols qualifying this interface. 1952 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 1953 1954 qual_iterator qual_begin() const { return Protocols.begin(); } 1955 qual_iterator qual_end() const { return Protocols.end(); } 1956 bool qual_empty() const { return Protocols.size() == 0; } 1957 1958 /// getNumProtocols - Return the number of qualifying protocols in this 1959 /// interface type, or 0 if there are none. 1960 unsigned getNumProtocols() const { return Protocols.size(); } 1961 1962 void Profile(llvm::FoldingSetNodeID &ID); 1963 static void Profile(llvm::FoldingSetNodeID &ID, QualType T, 1964 ObjCProtocolDecl **protocols, unsigned NumProtocols); 1965 virtual void getAsStringInternal(std::string &InnerString, 1966 const PrintingPolicy &Policy) const; 1967 static bool classof(const Type *T) { 1968 return T->getTypeClass() == ObjCObjectPointer; 1969 } 1970 static bool classof(const ObjCObjectPointerType *) { return true; } 1971}; 1972 1973/// ObjCQualifiedInterfaceType - This class represents interface types 1974/// conforming to a list of protocols, such as INTF<Proto1, Proto2, Proto1>. 1975/// 1976/// Duplicate protocols are removed and protocol list is canonicalized to be in 1977/// alphabetical order. 1978/// FIXME: Remove this class (converting uses to ObjCObjectPointerType). 1979class ObjCQualifiedInterfaceType : public ObjCInterfaceType, 1980 public llvm::FoldingSetNode { 1981 1982 // List of protocols for this protocol conforming object type 1983 // List is sorted on protocol name. No protocol is enterred more than once. 1984 llvm::SmallVector<ObjCProtocolDecl*, 4> Protocols; 1985 1986 ObjCQualifiedInterfaceType(ObjCInterfaceDecl *D, 1987 ObjCProtocolDecl **Protos, unsigned NumP) : 1988 ObjCInterfaceType(ObjCQualifiedInterface, D), 1989 Protocols(Protos, Protos+NumP) { } 1990 friend class ASTContext; // ASTContext creates these. 1991public: 1992 1993 unsigned getNumProtocols() const { 1994 return Protocols.size(); 1995 } 1996 1997 qual_iterator qual_begin() const { return Protocols.begin(); } 1998 qual_iterator qual_end() const { return Protocols.end(); } 1999 2000 virtual void getAsStringInternal(std::string &InnerString, 2001 const PrintingPolicy &Policy) const; 2002 2003 void Profile(llvm::FoldingSetNodeID &ID); 2004 static void Profile(llvm::FoldingSetNodeID &ID, 2005 const ObjCInterfaceDecl *Decl, 2006 ObjCProtocolDecl **protocols, unsigned NumProtocols); 2007 2008 static bool classof(const Type *T) { 2009 return T->getTypeClass() == ObjCQualifiedInterface; 2010 } 2011 static bool classof(const ObjCQualifiedInterfaceType *) { return true; } 2012}; 2013 2014inline ObjCInterfaceType::qual_iterator ObjCInterfaceType::qual_begin() const { 2015 if (const ObjCQualifiedInterfaceType *QIT = 2016 dyn_cast<ObjCQualifiedInterfaceType>(this)) 2017 return QIT->qual_begin(); 2018 return 0; 2019} 2020inline ObjCInterfaceType::qual_iterator ObjCInterfaceType::qual_end() const { 2021 if (const ObjCQualifiedInterfaceType *QIT = 2022 dyn_cast<ObjCQualifiedInterfaceType>(this)) 2023 return QIT->qual_end(); 2024 return 0; 2025} 2026 2027/// getNumProtocols - Return the number of qualifying protocols in this 2028/// interface type, or 0 if there are none. 2029inline unsigned ObjCInterfaceType::getNumProtocols() const { 2030 if (const ObjCQualifiedInterfaceType *QIT = 2031 dyn_cast<ObjCQualifiedInterfaceType>(this)) 2032 return QIT->getNumProtocols(); 2033 return 0; 2034} 2035 2036// Inline function definitions. 2037 2038/// getUnqualifiedType - Return the type without any qualifiers. 2039inline QualType QualType::getUnqualifiedType() const { 2040 Type *TP = getTypePtr(); 2041 if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(TP)) 2042 TP = EXTQT->getBaseType(); 2043 return QualType(TP, 0); 2044} 2045 2046/// getAddressSpace - Return the address space of this type. 2047inline unsigned QualType::getAddressSpace() const { 2048 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2049 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 2050 return AT->getElementType().getAddressSpace(); 2051 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 2052 return RT->getAddressSpace(); 2053 if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(CT)) 2054 return EXTQT->getAddressSpace(); 2055 return 0; 2056} 2057 2058/// getObjCGCAttr - Return the gc attribute of this type. 2059inline QualType::GCAttrTypes QualType::getObjCGCAttr() const { 2060 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2061 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 2062 return AT->getElementType().getObjCGCAttr(); 2063 if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(CT)) 2064 return EXTQT->getObjCGCAttr(); 2065 if (const ObjCObjectPointerType *PT = CT->getAsObjCObjectPointerType()) 2066 return PT->getPointeeType().getObjCGCAttr(); 2067 return GCNone; 2068} 2069 2070/// isMoreQualifiedThan - Determine whether this type is more 2071/// qualified than the Other type. For example, "const volatile int" 2072/// is more qualified than "const int", "volatile int", and 2073/// "int". However, it is not more qualified than "const volatile 2074/// int". 2075inline bool QualType::isMoreQualifiedThan(QualType Other) const { 2076 unsigned MyQuals = this->getCVRQualifiers(); 2077 unsigned OtherQuals = Other.getCVRQualifiers(); 2078 if (getAddressSpace() != Other.getAddressSpace()) 2079 return false; 2080 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 2081} 2082 2083/// isAtLeastAsQualifiedAs - Determine whether this type is at last 2084/// as qualified as the Other type. For example, "const volatile 2085/// int" is at least as qualified as "const int", "volatile int", 2086/// "int", and "const volatile int". 2087inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 2088 unsigned MyQuals = this->getCVRQualifiers(); 2089 unsigned OtherQuals = Other.getCVRQualifiers(); 2090 if (getAddressSpace() != Other.getAddressSpace()) 2091 return false; 2092 return (MyQuals | OtherQuals) == MyQuals; 2093} 2094 2095/// getNonReferenceType - If Type is a reference type (e.g., const 2096/// int&), returns the type that the reference refers to ("const 2097/// int"). Otherwise, returns the type itself. This routine is used 2098/// throughout Sema to implement C++ 5p6: 2099/// 2100/// If an expression initially has the type "reference to T" (8.3.2, 2101/// 8.5.3), the type is adjusted to "T" prior to any further 2102/// analysis, the expression designates the object or function 2103/// denoted by the reference, and the expression is an lvalue. 2104inline QualType QualType::getNonReferenceType() const { 2105 if (const ReferenceType *RefType = (*this)->getAsReferenceType()) 2106 return RefType->getPointeeType(); 2107 else 2108 return *this; 2109} 2110 2111inline const TypedefType* Type::getAsTypedefType() const { 2112 return dyn_cast<TypedefType>(this); 2113} 2114inline const ObjCInterfaceType *Type::getAsPointerToObjCInterfaceType() const { 2115 if (const PointerType *PT = getAsPointerType()) 2116 return PT->getPointeeType()->getAsObjCInterfaceType(); 2117 return 0; 2118} 2119 2120// NOTE: All of these methods use "getUnqualifiedType" to strip off address 2121// space qualifiers if present. 2122inline bool Type::isFunctionType() const { 2123 return isa<FunctionType>(CanonicalType.getUnqualifiedType()); 2124} 2125inline bool Type::isPointerType() const { 2126 return isa<PointerType>(CanonicalType.getUnqualifiedType()); 2127} 2128inline bool Type::isAnyPointerType() const { 2129 return isPointerType() || isObjCObjectPointerType(); 2130} 2131inline bool Type::isBlockPointerType() const { 2132 return isa<BlockPointerType>(CanonicalType.getUnqualifiedType()); 2133} 2134inline bool Type::isReferenceType() const { 2135 return isa<ReferenceType>(CanonicalType.getUnqualifiedType()); 2136} 2137inline bool Type::isLValueReferenceType() const { 2138 return isa<LValueReferenceType>(CanonicalType.getUnqualifiedType()); 2139} 2140inline bool Type::isRValueReferenceType() const { 2141 return isa<RValueReferenceType>(CanonicalType.getUnqualifiedType()); 2142} 2143inline bool Type::isFunctionPointerType() const { 2144 if (const PointerType* T = getAsPointerType()) 2145 return T->getPointeeType()->isFunctionType(); 2146 else 2147 return false; 2148} 2149inline bool Type::isMemberPointerType() const { 2150 return isa<MemberPointerType>(CanonicalType.getUnqualifiedType()); 2151} 2152inline bool Type::isMemberFunctionPointerType() const { 2153 if (const MemberPointerType* T = getAsMemberPointerType()) 2154 return T->getPointeeType()->isFunctionType(); 2155 else 2156 return false; 2157} 2158inline bool Type::isArrayType() const { 2159 return isa<ArrayType>(CanonicalType.getUnqualifiedType()); 2160} 2161inline bool Type::isConstantArrayType() const { 2162 return isa<ConstantArrayType>(CanonicalType.getUnqualifiedType()); 2163} 2164inline bool Type::isIncompleteArrayType() const { 2165 return isa<IncompleteArrayType>(CanonicalType.getUnqualifiedType()); 2166} 2167inline bool Type::isVariableArrayType() const { 2168 return isa<VariableArrayType>(CanonicalType.getUnqualifiedType()); 2169} 2170inline bool Type::isDependentSizedArrayType() const { 2171 return isa<DependentSizedArrayType>(CanonicalType.getUnqualifiedType()); 2172} 2173inline bool Type::isRecordType() const { 2174 return isa<RecordType>(CanonicalType.getUnqualifiedType()); 2175} 2176inline bool Type::isAnyComplexType() const { 2177 return isa<ComplexType>(CanonicalType.getUnqualifiedType()); 2178} 2179inline bool Type::isVectorType() const { 2180 return isa<VectorType>(CanonicalType.getUnqualifiedType()); 2181} 2182inline bool Type::isExtVectorType() const { 2183 return isa<ExtVectorType>(CanonicalType.getUnqualifiedType()); 2184} 2185inline bool Type::isObjCObjectPointerType() const { 2186 return isa<ObjCObjectPointerType>(CanonicalType.getUnqualifiedType()); 2187} 2188inline bool Type::isObjCInterfaceType() const { 2189 return isa<ObjCInterfaceType>(CanonicalType.getUnqualifiedType()); 2190} 2191inline bool Type::isObjCQualifiedInterfaceType() const { 2192 return isa<ObjCQualifiedInterfaceType>(CanonicalType.getUnqualifiedType()); 2193} 2194inline bool Type::isObjCQualifiedIdType() const { 2195 if (const ObjCObjectPointerType *OPT = getAsObjCObjectPointerType()) 2196 return OPT->isObjCQualifiedIdType(); 2197 return false; 2198} 2199inline bool Type::isObjCIdType() const { 2200 if (const ObjCObjectPointerType *OPT = getAsObjCObjectPointerType()) 2201 return OPT->isObjCIdType(); 2202 return false; 2203} 2204inline bool Type::isObjCClassType() const { 2205 if (const ObjCObjectPointerType *OPT = getAsObjCObjectPointerType()) 2206 return OPT->isObjCClassType(); 2207 return false; 2208} 2209inline bool Type::isObjCBuiltinType() const { 2210 return isObjCIdType() || isObjCClassType(); 2211} 2212 2213inline bool Type::isTemplateTypeParmType() const { 2214 return isa<TemplateTypeParmType>(CanonicalType.getUnqualifiedType()); 2215} 2216 2217inline bool Type::isSpecificBuiltinType(unsigned K) const { 2218 if (const BuiltinType *BT = getAsBuiltinType()) 2219 if (BT->getKind() == (BuiltinType::Kind) K) 2220 return true; 2221 return false; 2222} 2223 2224/// \brief Determines whether this is a type for which one can define 2225/// an overloaded operator. 2226inline bool Type::isOverloadableType() const { 2227 return isDependentType() || isRecordType() || isEnumeralType(); 2228} 2229 2230inline bool Type::hasPointerRepresentation() const { 2231 return (isPointerType() || isReferenceType() || isBlockPointerType() || 2232 isObjCInterfaceType() || isObjCObjectPointerType() || 2233 isObjCQualifiedInterfaceType() || isNullPtrType()); 2234} 2235 2236inline bool Type::hasObjCPointerRepresentation() const { 2237 return (isObjCInterfaceType() || isObjCObjectPointerType() || 2238 isObjCQualifiedInterfaceType()); 2239} 2240 2241/// Insertion operator for diagnostics. This allows sending QualType's into a 2242/// diagnostic with <<. 2243inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 2244 QualType T) { 2245 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 2246 Diagnostic::ak_qualtype); 2247 return DB; 2248} 2249 2250} // end namespace clang 2251 2252#endif 2253