Type.h revision 8e9bebdea69c590dedfbf27374114cb76fe12fbd
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 "llvm/Support/Casting.h" 18#include "llvm/ADT/FoldingSet.h" 19#include "llvm/ADT/APSInt.h" 20#include "llvm/Bitcode/SerializationFwd.h" 21 22using llvm::isa; 23using llvm::cast; 24using llvm::cast_or_null; 25using llvm::dyn_cast; 26using llvm::dyn_cast_or_null; 27 28namespace clang { 29 class ASTContext; 30 class Type; 31 class TypedefDecl; 32 class TagDecl; 33 class RecordDecl; 34 class CXXRecordDecl; 35 class EnumDecl; 36 class FieldDecl; 37 class ObjCInterfaceDecl; 38 class ObjCProtocolDecl; 39 class ObjCMethodDecl; 40 class Expr; 41 class Stmt; 42 class SourceLocation; 43 class PointerLikeType; 44 class PointerType; 45 class BlockPointerType; 46 class ReferenceType; 47 class VectorType; 48 class ArrayType; 49 class ConstantArrayType; 50 class VariableArrayType; 51 class IncompleteArrayType; 52 class RecordType; 53 class EnumType; 54 class ComplexType; 55 class TagType; 56 class TypedefType; 57 class FunctionType; 58 class FunctionTypeProto; 59 class ExtVectorType; 60 class BuiltinType; 61 class ObjCInterfaceType; 62 class ObjCQualifiedIdType; 63 class ObjCQualifiedInterfaceType; 64 class StmtIteratorBase; 65 66/// QualType - For efficiency, we don't store CVR-qualified types as nodes on 67/// their own: instead each reference to a type stores the qualifiers. This 68/// greatly reduces the number of nodes we need to allocate for types (for 69/// example we only need one for 'int', 'const int', 'volatile int', 70/// 'const volatile int', etc). 71/// 72/// As an added efficiency bonus, instead of making this a pair, we just store 73/// the three bits we care about in the low bits of the pointer. To handle the 74/// packing/unpacking, we make QualType be a simple wrapper class that acts like 75/// a smart pointer. 76class QualType { 77 uintptr_t ThePtr; 78public: 79 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 80 Const = 0x1, 81 Restrict = 0x2, 82 Volatile = 0x4, 83 CVRFlags = Const|Restrict|Volatile 84 }; 85 86 QualType() : ThePtr(0) {} 87 88 QualType(Type *Ptr, unsigned Quals) { 89 assert((Quals & ~CVRFlags) == 0 && "Invalid type qualifiers!"); 90 ThePtr = reinterpret_cast<uintptr_t>(Ptr); 91 assert((ThePtr & CVRFlags) == 0 && "Type pointer not 8-byte aligned?"); 92 ThePtr |= Quals; 93 } 94 95 QualType(const Type *Ptr, unsigned Quals) { 96 assert((Quals & ~CVRFlags) == 0 && "Invalid type qualifiers!"); 97 ThePtr = reinterpret_cast<uintptr_t>(Ptr); 98 assert((ThePtr & CVRFlags) == 0 && "Type pointer not 8-byte aligned?"); 99 ThePtr |= Quals; 100 } 101 102 static QualType getFromOpaquePtr(void *Ptr) { 103 QualType T; 104 T.ThePtr = reinterpret_cast<uintptr_t>(Ptr); 105 return T; 106 } 107 108 unsigned getCVRQualifiers() const { 109 return ThePtr & CVRFlags; 110 } 111 Type *getTypePtr() const { 112 return reinterpret_cast<Type*>(ThePtr & ~CVRFlags); 113 } 114 115 void *getAsOpaquePtr() const { 116 return reinterpret_cast<void*>(ThePtr); 117 } 118 119 Type &operator*() const { 120 return *getTypePtr(); 121 } 122 123 Type *operator->() const { 124 return getTypePtr(); 125 } 126 127 /// isNull - Return true if this QualType doesn't point to a type yet. 128 bool isNull() const { 129 return ThePtr == 0; 130 } 131 132 bool isConstQualified() const { 133 return (ThePtr & Const) ? true : false; 134 } 135 bool isVolatileQualified() const { 136 return (ThePtr & Volatile) ? true : false; 137 } 138 bool isRestrictQualified() const { 139 return (ThePtr & Restrict) ? true : false; 140 } 141 142 bool isConstant(ASTContext& Ctx) const; 143 144 /// addConst/addVolatile/addRestrict - add the specified type qual to this 145 /// QualType. 146 void addConst() { ThePtr |= Const; } 147 void addVolatile() { ThePtr |= Volatile; } 148 void addRestrict() { ThePtr |= Restrict; } 149 150 void removeConst() { ThePtr &= ~Const; } 151 void removeVolatile() { ThePtr &= ~Volatile; } 152 void removeRestrict() { ThePtr &= ~Restrict; } 153 154 QualType getQualifiedType(unsigned TQs) const { 155 return QualType(getTypePtr(), TQs); 156 } 157 QualType getWithAdditionalQualifiers(unsigned TQs) const { 158 return QualType(getTypePtr(), TQs|getCVRQualifiers()); 159 } 160 161 inline QualType getUnqualifiedType() const; 162 163 /// operator==/!= - Indicate whether the specified types and qualifiers are 164 /// identical. 165 bool operator==(const QualType &RHS) const { 166 return ThePtr == RHS.ThePtr; 167 } 168 bool operator!=(const QualType &RHS) const { 169 return ThePtr != RHS.ThePtr; 170 } 171 std::string getAsString() const { 172 std::string S; 173 getAsStringInternal(S); 174 return S; 175 } 176 void getAsStringInternal(std::string &Str) const; 177 178 void dump(const char *s) const; 179 void dump() const; 180 181 void Profile(llvm::FoldingSetNodeID &ID) const { 182 ID.AddPointer(getAsOpaquePtr()); 183 } 184 185public: 186 187 /// getAddressSpace - Return the address space of this type. 188 inline unsigned getAddressSpace() const; 189 190 /// Emit - Serialize a QualType to Bitcode. 191 void Emit(llvm::Serializer& S) const; 192 193 /// Read - Deserialize a QualType from Bitcode. 194 static QualType ReadVal(llvm::Deserializer& D); 195 196 void ReadBackpatch(llvm::Deserializer& D); 197}; 198 199} // end clang. 200 201namespace llvm { 202/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 203/// to a specific Type class. 204template<> struct simplify_type<const ::clang::QualType> { 205 typedef ::clang::Type* SimpleType; 206 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 207 return Val.getTypePtr(); 208 } 209}; 210template<> struct simplify_type< ::clang::QualType> 211 : public simplify_type<const ::clang::QualType> {}; 212 213} // end namespace llvm 214 215namespace clang { 216 217/// Type - This is the base class of the type hierarchy. A central concept 218/// with types is that each type always has a canonical type. A canonical type 219/// is the type with any typedef names stripped out of it or the types it 220/// references. For example, consider: 221/// 222/// typedef int foo; 223/// typedef foo* bar; 224/// 'int *' 'foo *' 'bar' 225/// 226/// There will be a Type object created for 'int'. Since int is canonical, its 227/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 228/// TypeNameType). Its CanonicalType pointer points to the 'int' Type. Next 229/// there is a PointerType that represents 'int*', which, like 'int', is 230/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 231/// type is 'int*', and there is a TypeNameType for 'bar', whose canonical type 232/// is also 'int*'. 233/// 234/// Non-canonical types are useful for emitting diagnostics, without losing 235/// information about typedefs being used. Canonical types are useful for type 236/// comparisons (they allow by-pointer equality tests) and useful for reasoning 237/// about whether something has a particular form (e.g. is a function type), 238/// because they implicitly, recursively, strip all typedefs out of a type. 239/// 240/// Types, once created, are immutable. 241/// 242class Type { 243public: 244 enum TypeClass { 245 Builtin, Complex, Pointer, Reference, 246 ConstantArray, VariableArray, IncompleteArray, 247 Vector, ExtVector, 248 FunctionNoProto, FunctionProto, 249 TypeName, Tagged, ASQual, 250 ObjCInterface, ObjCQualifiedInterface, 251 ObjCQualifiedId, 252 TypeOfExp, TypeOfTyp, // GNU typeof extension. 253 BlockPointer // C extension 254 }; 255private: 256 QualType CanonicalType; 257 258 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 259 /// Note that this should stay at the end of the ivars for Type so that 260 /// subclasses can pack their bitfields into the same word. 261 unsigned TC : 5; 262protected: 263 // silence VC++ warning C4355: 'this' : used in base member initializer list 264 Type *this_() { return this; } 265 Type(TypeClass tc, QualType Canonical) 266 : CanonicalType(Canonical.isNull() ? QualType(this_(), 0) : Canonical), 267 TC(tc) {} 268 virtual ~Type() {}; 269 virtual void Destroy(ASTContext& C); 270 friend class ASTContext; 271 272 void EmitTypeInternal(llvm::Serializer& S) const; 273 void ReadTypeInternal(llvm::Deserializer& D); 274 275public: 276 TypeClass getTypeClass() const { return static_cast<TypeClass>(TC); } 277 278 bool isCanonical() const { return CanonicalType.getTypePtr() == this; } 279 280 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 281 /// object types, function types, and incomplete types. 282 283 /// isObjectType - types that fully describe objects. An object is a region 284 /// of memory that can be examined and stored into (H&S). 285 bool isObjectType() const; 286 287 /// isIncompleteType - Return true if this is an incomplete type. 288 /// A type that can describe objects, but which lacks information needed to 289 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 290 /// routine will need to determine if the size is actually required. 291 bool isIncompleteType() const; 292 293 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 294 /// type, in other words, not a function type. 295 bool isIncompleteOrObjectType() const { 296 return !isFunctionType(); 297 } 298 299 /// isVariablyModifiedType (C99 6.7.5.2p2) - Return true for variable array 300 /// types that have a non-constant expression. This does not include "[]". 301 bool isVariablyModifiedType() const; 302 303 /// Helper methods to distinguish type categories. All type predicates 304 /// operate on the canonical type, ignoring typedefs and qualifiers. 305 306 /// isIntegerType() does *not* include complex integers (a GCC extension). 307 /// isComplexIntegerType() can be used to test for complex integers. 308 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 309 bool isEnumeralType() const; 310 bool isBooleanType() const; 311 bool isCharType() const; 312 bool isWideCharType() const; 313 bool isIntegralType() const; 314 315 /// Floating point categories. 316 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 317 /// isComplexType() does *not* include complex integers (a GCC extension). 318 /// isComplexIntegerType() can be used to test for complex integers. 319 bool isComplexType() const; // C99 6.2.5p11 (complex) 320 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 321 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 322 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 323 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 324 bool isVoidType() const; // C99 6.2.5p19 325 bool isDerivedType() const; // C99 6.2.5p20 326 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 327 bool isAggregateType() const; // C99 6.2.5p21 (arrays, structures) 328 329 // Type Predicates: Check to see if this type is structurally the specified 330 // type, ignoring typedefs and qualifiers. 331 bool isFunctionType() const; 332 bool isPointerLikeType() const; // Pointer or Reference. 333 bool isPointerType() const; 334 bool isBlockPointerType() const; 335 bool isReferenceType() const; 336 bool isFunctionPointerType() const; 337 bool isArrayType() const; 338 bool isConstantArrayType() const; 339 bool isIncompleteArrayType() const; 340 bool isVariableArrayType() const; 341 bool isRecordType() const; 342 bool isClassType() const; 343 bool isStructureType() const; 344 bool isUnionType() const; 345 bool isComplexIntegerType() const; // GCC _Complex integer type. 346 bool isVectorType() const; // GCC vector type. 347 bool isExtVectorType() const; // Extended vector type. 348 bool isObjCInterfaceType() const; // NSString or NSString<foo> 349 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 350 bool isObjCQualifiedIdType() const; // id<foo> 351 352 // Type Checking Functions: Check to see if this type is structurally the 353 // specified type, ignoring typedefs and qualifiers, and return a pointer to 354 // the best type we can. 355 const BuiltinType *getAsBuiltinType() const; 356 const FunctionType *getAsFunctionType() const; 357 const FunctionTypeProto *getAsFunctionTypeProto() const; 358 const PointerLikeType *getAsPointerLikeType() const; // Pointer or Reference. 359 const PointerType *getAsPointerType() const; 360 const BlockPointerType *getAsBlockPointerType() const; 361 const ReferenceType *getAsReferenceType() const; 362 const RecordType *getAsRecordType() const; 363 const RecordType *getAsStructureType() const; 364 /// NOTE: getAsArrayType* are methods on ASTContext. 365 const TypedefType *getAsTypedefType() const; 366 const RecordType *getAsUnionType() const; 367 const EnumType *getAsEnumType() const; 368 const VectorType *getAsVectorType() const; // GCC vector type. 369 const ComplexType *getAsComplexType() const; 370 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 371 const ExtVectorType *getAsExtVectorType() const; // Extended vector type. 372 const ObjCInterfaceType *getAsObjCInterfaceType() const; 373 const ObjCQualifiedInterfaceType *getAsObjCQualifiedInterfaceType() const; 374 const ObjCQualifiedIdType *getAsObjCQualifiedIdType() const; 375 376 /// getAsPointerToObjCInterfaceType - If this is a pointer to an ObjC 377 /// interface, return the interface type, otherwise return null. 378 const ObjCInterfaceType *getAsPointerToObjCInterfaceType() const; 379 380 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 381 /// element type of the array, potentially with type qualifiers missing. 382 /// This method should never be used when type qualifiers are meaningful. 383 const Type *getArrayElementTypeNoTypeQual() const; 384 385 386 387 /// getDesugaredType - Return the specified type with any "sugar" removed from 388 /// the type. This takes off typedefs, typeof's etc. If the outer level of 389 /// the type is already concrete, it returns it unmodified. This is similar 390 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 391 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 392 /// concrete. 393 QualType getDesugaredType() const; 394 395 /// More type predicates useful for type checking/promotion 396 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 397 398 /// isSignedIntegerType - Return true if this is an integer type that is 399 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 400 /// an enum decl which has a signed representation, or a vector of signed 401 /// integer element type. 402 bool isSignedIntegerType() const; 403 404 /// isUnsignedIntegerType - Return true if this is an integer type that is 405 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 406 /// decl which has an unsigned representation, or a vector of unsigned integer 407 /// element type. 408 bool isUnsignedIntegerType() const; 409 410 /// isConstantSizeType - Return true if this is not a variable sized type, 411 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 412 /// incomplete types. 413 bool isConstantSizeType() const; 414 415 QualType getCanonicalTypeInternal() const { return CanonicalType; } 416 void dump() const; 417 virtual void getAsStringInternal(std::string &InnerString) const = 0; 418 static bool classof(const Type *) { return true; } 419 420protected: 421 /// Emit - Emit a Type to bitcode. Used by ASTContext. 422 void Emit(llvm::Serializer& S) const; 423 424 /// Create - Construct a Type from bitcode. Used by ASTContext. 425 static void Create(ASTContext& Context, unsigned i, llvm::Deserializer& S); 426 427 /// EmitImpl - Subclasses must implement this method in order to 428 /// be serialized. 429 // FIXME: Make this abstract once implemented. 430 virtual void EmitImpl(llvm::Serializer& S) const { 431 assert (false && "Serializization for type not supported."); 432 } 433}; 434 435/// ASQualType - TR18037 (C embedded extensions) 6.2.5p26 436/// This supports address space qualified types. 437/// 438class ASQualType : public Type, public llvm::FoldingSetNode { 439 /// BaseType - This is the underlying type that this qualifies. All CVR 440 /// qualifiers are stored on the QualType that references this type, so we 441 /// can't have any here. 442 Type *BaseType; 443 /// Address Space ID - The address space ID this type is qualified with. 444 unsigned AddressSpace; 445 ASQualType(Type *Base, QualType CanonicalPtr, unsigned AddrSpace) : 446 Type(ASQual, CanonicalPtr), BaseType(Base), AddressSpace(AddrSpace) { 447 } 448 friend class ASTContext; // ASTContext creates these. 449public: 450 Type *getBaseType() const { return BaseType; } 451 unsigned getAddressSpace() const { return AddressSpace; } 452 453 virtual void getAsStringInternal(std::string &InnerString) const; 454 455 void Profile(llvm::FoldingSetNodeID &ID) { 456 Profile(ID, getBaseType(), AddressSpace); 457 } 458 static void Profile(llvm::FoldingSetNodeID &ID, Type *Base, 459 unsigned AddrSpace) { 460 ID.AddPointer(Base); 461 ID.AddInteger(AddrSpace); 462 } 463 464 static bool classof(const Type *T) { return T->getTypeClass() == ASQual; } 465 static bool classof(const ASQualType *) { return true; } 466 467protected: 468 virtual void EmitImpl(llvm::Serializer& S) const; 469 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 470 friend class Type; 471}; 472 473 474/// BuiltinType - This class is used for builtin types like 'int'. Builtin 475/// types are always canonical and have a literal name field. 476class BuiltinType : public Type { 477public: 478 enum Kind { 479 Void, 480 481 Bool, // This is bool and/or _Bool. 482 Char_U, // This is 'char' for targets where char is unsigned. 483 UChar, // This is explicitly qualified unsigned char. 484 UShort, 485 UInt, 486 ULong, 487 ULongLong, 488 489 Char_S, // This is 'char' for targets where char is signed. 490 SChar, // This is explicitly qualified signed char. 491 WChar, // This is 'wchar_t' for C++. 492 Short, 493 Int, 494 Long, 495 LongLong, 496 497 Float, Double, LongDouble, 498 499 Overload // This represents the type of an overloaded function declaration. 500 }; 501private: 502 Kind TypeKind; 503public: 504 BuiltinType(Kind K) : Type(Builtin, QualType()), TypeKind(K) {} 505 506 Kind getKind() const { return TypeKind; } 507 const char *getName() const; 508 509 virtual void getAsStringInternal(std::string &InnerString) const; 510 511 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 512 static bool classof(const BuiltinType *) { return true; } 513}; 514 515/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 516/// types (_Complex float etc) as well as the GCC integer complex extensions. 517/// 518class ComplexType : public Type, public llvm::FoldingSetNode { 519 QualType ElementType; 520 ComplexType(QualType Element, QualType CanonicalPtr) : 521 Type(Complex, CanonicalPtr), ElementType(Element) { 522 } 523 friend class ASTContext; // ASTContext creates these. 524public: 525 QualType getElementType() const { return ElementType; } 526 527 virtual void getAsStringInternal(std::string &InnerString) const; 528 529 void Profile(llvm::FoldingSetNodeID &ID) { 530 Profile(ID, getElementType()); 531 } 532 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 533 ID.AddPointer(Element.getAsOpaquePtr()); 534 } 535 536 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 537 static bool classof(const ComplexType *) { return true; } 538 539protected: 540 virtual void EmitImpl(llvm::Serializer& S) const; 541 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 542 friend class Type; 543}; 544 545/// PointerLikeType - Common base class for pointers and references. 546/// FIXME: Add more documentation on this classes design point. For example, 547/// should BlockPointerType inherit from it? Is the concept of a PointerLikeType 548/// in the C++ standard? 549/// 550class PointerLikeType : public Type { 551 QualType PointeeType; 552protected: 553 PointerLikeType(TypeClass K, QualType Pointee, QualType CanonicalPtr) : 554 Type(K, CanonicalPtr), PointeeType(Pointee) { 555 } 556public: 557 558 QualType getPointeeType() const { return PointeeType; } 559 560 static bool classof(const Type *T) { 561 return T->getTypeClass() == Pointer || T->getTypeClass() == Reference; 562 } 563 static bool classof(const PointerLikeType *) { return true; } 564}; 565 566/// PointerType - C99 6.7.5.1 - Pointer Declarators. 567/// 568class PointerType : public PointerLikeType, public llvm::FoldingSetNode { 569 PointerType(QualType Pointee, QualType CanonicalPtr) : 570 PointerLikeType(Pointer, Pointee, CanonicalPtr) { 571 } 572 friend class ASTContext; // ASTContext creates these. 573public: 574 575 virtual void getAsStringInternal(std::string &InnerString) const; 576 577 void Profile(llvm::FoldingSetNodeID &ID) { 578 Profile(ID, getPointeeType()); 579 } 580 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 581 ID.AddPointer(Pointee.getAsOpaquePtr()); 582 } 583 584 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 585 static bool classof(const PointerType *) { return true; } 586 587protected: 588 virtual void EmitImpl(llvm::Serializer& S) const; 589 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 590 friend class Type; 591}; 592 593/// BlockPointerType - pointer to a block type. 594/// This type is to represent types syntactically represented as 595/// "void (^)(int)", etc. Pointee is required to always be a function type. 596/// FIXME: Should BlockPointerType inherit from PointerLikeType? It could 597/// simplfy some type checking code, however PointerLikeType doesn't appear 598/// to be used by the type checker. 599/// 600class BlockPointerType : public Type, public llvm::FoldingSetNode { 601 QualType PointeeType; // Block is some kind of pointer type 602 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 603 Type(BlockPointer, CanonicalCls), PointeeType(Pointee) { 604 } 605 friend class ASTContext; // ASTContext creates these. 606public: 607 608 // Get the pointee type. Pointee is required to always be a function type. 609 QualType getPointeeType() const { return PointeeType; } 610 611 virtual void getAsStringInternal(std::string &InnerString) const; 612 613 void Profile(llvm::FoldingSetNodeID &ID) { 614 Profile(ID, getPointeeType()); 615 } 616 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 617 ID.AddPointer(Pointee.getAsOpaquePtr()); 618 } 619 620 static bool classof(const Type *T) { 621 return T->getTypeClass() == BlockPointer; 622 } 623 static bool classof(const BlockPointerType *) { return true; } 624 625 protected: 626 virtual void EmitImpl(llvm::Serializer& S) const; 627 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 628 friend class Type; 629}; 630 631/// ReferenceType - C++ 8.3.2 - Reference Declarators. 632/// 633class ReferenceType : public PointerLikeType, public llvm::FoldingSetNode { 634 ReferenceType(QualType Referencee, QualType CanonicalRef) : 635 PointerLikeType(Reference, Referencee, CanonicalRef) { 636 } 637 friend class ASTContext; // ASTContext creates these. 638public: 639 virtual void getAsStringInternal(std::string &InnerString) const; 640 641 void Profile(llvm::FoldingSetNodeID &ID) { 642 Profile(ID, getPointeeType()); 643 } 644 static void Profile(llvm::FoldingSetNodeID &ID, QualType Referencee) { 645 ID.AddPointer(Referencee.getAsOpaquePtr()); 646 } 647 648 static bool classof(const Type *T) { return T->getTypeClass() == Reference; } 649 static bool classof(const ReferenceType *) { return true; } 650}; 651 652/// ArrayType - C99 6.7.5.2 - Array Declarators. 653/// 654class ArrayType : public Type, public llvm::FoldingSetNode { 655public: 656 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 657 /// an array with a static size (e.g. int X[static 4]), or with a star size 658 /// (e.g. int X[*]). 'static' is only allowed on function parameters. 659 enum ArraySizeModifier { 660 Normal, Static, Star 661 }; 662private: 663 /// ElementType - The element type of the array. 664 QualType ElementType; 665 666 // NOTE: VC++ treats enums as signed, avoid using the ArraySizeModifier enum 667 /// NOTE: These fields are packed into the bitfields space in the Type class. 668 unsigned SizeModifier : 2; 669 670 /// IndexTypeQuals - Capture qualifiers in declarations like: 671 /// 'int X[static restrict 4]'. For function parameters only. 672 unsigned IndexTypeQuals : 3; 673 674protected: 675 ArrayType(TypeClass tc, QualType et, QualType can, 676 ArraySizeModifier sm, unsigned tq) 677 : Type(tc, can), ElementType(et), SizeModifier(sm), IndexTypeQuals(tq) {} 678 friend class ASTContext; // ASTContext creates these. 679public: 680 QualType getElementType() const { return ElementType; } 681 ArraySizeModifier getSizeModifier() const { 682 return ArraySizeModifier(SizeModifier); 683 } 684 unsigned getIndexTypeQualifier() const { return IndexTypeQuals; } 685 686 static bool classof(const Type *T) { 687 return T->getTypeClass() == ConstantArray || 688 T->getTypeClass() == VariableArray || 689 T->getTypeClass() == IncompleteArray; 690 } 691 static bool classof(const ArrayType *) { return true; } 692}; 693 694/// ConstantArrayType - This class represents C arrays with a specified constant 695/// size. For example 'int A[100]' has ConstantArrayType where the element type 696/// is 'int' and the size is 100. 697class ConstantArrayType : public ArrayType { 698 llvm::APInt Size; // Allows us to unique the type. 699 700 ConstantArrayType(QualType et, QualType can, llvm::APInt sz, 701 ArraySizeModifier sm, unsigned tq) 702 : ArrayType(ConstantArray, et, can, sm, tq), Size(sz) {} 703 friend class ASTContext; // ASTContext creates these. 704public: 705 const llvm::APInt &getSize() const { return Size; } 706 virtual void getAsStringInternal(std::string &InnerString) const; 707 708 void Profile(llvm::FoldingSetNodeID &ID) { 709 Profile(ID, getElementType(), getSize()); 710 } 711 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 712 llvm::APInt ArraySize) { 713 ID.AddPointer(ET.getAsOpaquePtr()); 714 ID.AddInteger(ArraySize.getZExtValue()); 715 } 716 static bool classof(const Type *T) { 717 return T->getTypeClass() == ConstantArray; 718 } 719 static bool classof(const ConstantArrayType *) { return true; } 720 721protected: 722 virtual void EmitImpl(llvm::Serializer& S) const; 723 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 724 friend class Type; 725}; 726 727/// IncompleteArrayType - This class represents C arrays with an unspecified 728/// size. For example 'int A[]' has an IncompleteArrayType where the element 729/// type is 'int' and the size is unspecified. 730class IncompleteArrayType : public ArrayType { 731 IncompleteArrayType(QualType et, QualType can, 732 ArraySizeModifier sm, unsigned tq) 733 : ArrayType(IncompleteArray, et, can, sm, tq) {} 734 friend class ASTContext; // ASTContext creates these. 735public: 736 737 virtual void getAsStringInternal(std::string &InnerString) const; 738 739 static bool classof(const Type *T) { 740 return T->getTypeClass() == IncompleteArray; 741 } 742 static bool classof(const IncompleteArrayType *) { return true; } 743 744 friend class StmtIteratorBase; 745 746 void Profile(llvm::FoldingSetNodeID &ID) { 747 Profile(ID, getElementType()); 748 } 749 750 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET) { 751 ID.AddPointer(ET.getAsOpaquePtr()); 752 } 753 754protected: 755 virtual void EmitImpl(llvm::Serializer& S) const; 756 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 757 friend class Type; 758}; 759 760/// VariableArrayType - This class represents C arrays with a specified size 761/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 762/// Since the size expression is an arbitrary expression, we store it as such. 763/// 764/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 765/// should not be: two lexically equivalent variable array types could mean 766/// different things, for example, these variables do not have the same type 767/// dynamically: 768/// 769/// void foo(int x) { 770/// int Y[x]; 771/// ++x; 772/// int Z[x]; 773/// } 774/// 775class VariableArrayType : public ArrayType { 776 /// SizeExpr - An assignment expression. VLA's are only permitted within 777 /// a function block. 778 Stmt *SizeExpr; 779 780 VariableArrayType(QualType et, QualType can, Expr *e, 781 ArraySizeModifier sm, unsigned tq) 782 : ArrayType(VariableArray, et, can, sm, tq), SizeExpr((Stmt*) e) {} 783 friend class ASTContext; // ASTContext creates these. 784 virtual void Destroy(ASTContext& C); 785 786public: 787 Expr *getSizeExpr() const { 788 // We use C-style casts instead of cast<> here because we do not wish 789 // to have a dependency of Type.h on Stmt.h/Expr.h. 790 return (Expr*) SizeExpr; 791 } 792 793 virtual void getAsStringInternal(std::string &InnerString) const; 794 795 static bool classof(const Type *T) { 796 return T->getTypeClass() == VariableArray; 797 } 798 static bool classof(const VariableArrayType *) { return true; } 799 800 friend class StmtIteratorBase; 801 802 void Profile(llvm::FoldingSetNodeID &ID) { 803 assert (0 && "Cannnot unique VariableArrayTypes."); 804 } 805 806protected: 807 virtual void EmitImpl(llvm::Serializer& S) const; 808 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 809 friend class Type; 810}; 811 812/// VectorType - GCC generic vector type. This type is created using 813/// __attribute__((vector_size(n)), where "n" specifies the vector size in 814/// bytes. Since the constructor takes the number of vector elements, the 815/// client is responsible for converting the size into the number of elements. 816class VectorType : public Type, public llvm::FoldingSetNode { 817protected: 818 /// ElementType - The element type of the vector. 819 QualType ElementType; 820 821 /// NumElements - The number of elements in the vector. 822 unsigned NumElements; 823 824 VectorType(QualType vecType, unsigned nElements, QualType canonType) : 825 Type(Vector, canonType), ElementType(vecType), NumElements(nElements) {} 826 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 827 QualType canonType) : Type(tc, canonType), ElementType(vecType), 828 NumElements(nElements) {} 829 friend class ASTContext; // ASTContext creates these. 830public: 831 832 QualType getElementType() const { return ElementType; } 833 unsigned getNumElements() const { return NumElements; } 834 835 virtual void getAsStringInternal(std::string &InnerString) const; 836 837 void Profile(llvm::FoldingSetNodeID &ID) { 838 Profile(ID, getElementType(), getNumElements(), getTypeClass()); 839 } 840 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 841 unsigned NumElements, TypeClass TypeClass) { 842 ID.AddPointer(ElementType.getAsOpaquePtr()); 843 ID.AddInteger(NumElements); 844 ID.AddInteger(TypeClass); 845 } 846 static bool classof(const Type *T) { 847 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 848 } 849 static bool classof(const VectorType *) { return true; } 850}; 851 852/// ExtVectorType - Extended vector type. This type is created using 853/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 854/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 855/// class enables syntactic extensions, like Vector Components for accessing 856/// points, colors, and textures (modeled after OpenGL Shading Language). 857class ExtVectorType : public VectorType { 858 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 859 VectorType(ExtVector, vecType, nElements, canonType) {} 860 friend class ASTContext; // ASTContext creates these. 861public: 862 static int getPointAccessorIdx(char c) { 863 switch (c) { 864 default: return -1; 865 case 'x': return 0; 866 case 'y': return 1; 867 case 'z': return 2; 868 case 'w': return 3; 869 } 870 } 871 static int getColorAccessorIdx(char c) { 872 switch (c) { 873 default: return -1; 874 case 'r': return 0; 875 case 'g': return 1; 876 case 'b': return 2; 877 case 'a': return 3; 878 } 879 } 880 static int getTextureAccessorIdx(char c) { 881 switch (c) { 882 default: return -1; 883 case 's': return 0; 884 case 't': return 1; 885 case 'p': return 2; 886 case 'q': return 3; 887 } 888 }; 889 890 static int getAccessorIdx(char c) { 891 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 892 if (int idx = getColorAccessorIdx(c)+1) return idx-1; 893 return getTextureAccessorIdx(c); 894 } 895 896 bool isAccessorWithinNumElements(char c) const { 897 if (int idx = getAccessorIdx(c)+1) 898 return unsigned(idx-1) < NumElements; 899 return false; 900 } 901 virtual void getAsStringInternal(std::string &InnerString) const; 902 903 static bool classof(const Type *T) { 904 return T->getTypeClass() == ExtVector; 905 } 906 static bool classof(const ExtVectorType *) { return true; } 907}; 908 909/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 910/// class of FunctionTypeNoProto and FunctionTypeProto. 911/// 912class FunctionType : public Type { 913 /// SubClassData - This field is owned by the subclass, put here to pack 914 /// tightly with the ivars in Type. 915 bool SubClassData : 1; 916 917 // The type returned by the function. 918 QualType ResultType; 919protected: 920 FunctionType(TypeClass tc, QualType res, bool SubclassInfo,QualType Canonical) 921 : Type(tc, Canonical), SubClassData(SubclassInfo), ResultType(res) {} 922 bool getSubClassData() const { return SubClassData; } 923public: 924 925 QualType getResultType() const { return ResultType; } 926 927 928 static bool classof(const Type *T) { 929 return T->getTypeClass() == FunctionNoProto || 930 T->getTypeClass() == FunctionProto; 931 } 932 static bool classof(const FunctionType *) { return true; } 933}; 934 935/// FunctionTypeNoProto - Represents a K&R-style 'int foo()' function, which has 936/// no information available about its arguments. 937class FunctionTypeNoProto : public FunctionType, public llvm::FoldingSetNode { 938 FunctionTypeNoProto(QualType Result, QualType Canonical) 939 : FunctionType(FunctionNoProto, Result, false, Canonical) {} 940 friend class ASTContext; // ASTContext creates these. 941public: 942 // No additional state past what FunctionType provides. 943 944 virtual void getAsStringInternal(std::string &InnerString) const; 945 946 void Profile(llvm::FoldingSetNodeID &ID) { 947 Profile(ID, getResultType()); 948 } 949 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType) { 950 ID.AddPointer(ResultType.getAsOpaquePtr()); 951 } 952 953 static bool classof(const Type *T) { 954 return T->getTypeClass() == FunctionNoProto; 955 } 956 static bool classof(const FunctionTypeNoProto *) { return true; } 957 958protected: 959 virtual void EmitImpl(llvm::Serializer& S) const; 960 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 961 friend class Type; 962}; 963 964/// FunctionTypeProto - Represents a prototype with argument type info, e.g. 965/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 966/// arguments, not as having a single void argument. 967class FunctionTypeProto : public FunctionType, public llvm::FoldingSetNode { 968 FunctionTypeProto(QualType Result, const QualType *ArgArray, unsigned numArgs, 969 bool isVariadic, QualType Canonical) 970 : FunctionType(FunctionProto, Result, isVariadic, Canonical), 971 NumArgs(numArgs) { 972 // Fill in the trailing argument array. 973 QualType *ArgInfo = reinterpret_cast<QualType *>(this+1);; 974 for (unsigned i = 0; i != numArgs; ++i) 975 ArgInfo[i] = ArgArray[i]; 976 } 977 978 /// NumArgs - The number of arguments this function has, not counting '...'. 979 unsigned NumArgs; 980 981 /// ArgInfo - There is an variable size array after the class in memory that 982 /// holds the argument types. 983 984 friend class ASTContext; // ASTContext creates these. 985 virtual void Destroy(ASTContext& C); 986 987public: 988 unsigned getNumArgs() const { return NumArgs; } 989 QualType getArgType(unsigned i) const { 990 assert(i < NumArgs && "Invalid argument number!"); 991 return arg_type_begin()[i]; 992 } 993 994 bool isVariadic() const { return getSubClassData(); } 995 996 typedef const QualType *arg_type_iterator; 997 arg_type_iterator arg_type_begin() const { 998 return reinterpret_cast<const QualType *>(this+1); 999 } 1000 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 1001 1002 virtual void getAsStringInternal(std::string &InnerString) const; 1003 1004 static bool classof(const Type *T) { 1005 return T->getTypeClass() == FunctionProto; 1006 } 1007 static bool classof(const FunctionTypeProto *) { return true; } 1008 1009 void Profile(llvm::FoldingSetNodeID &ID); 1010 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 1011 arg_type_iterator ArgTys, unsigned NumArgs, 1012 bool isVariadic); 1013 1014protected: 1015 virtual void EmitImpl(llvm::Serializer& S) const; 1016 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 1017 friend class Type; 1018}; 1019 1020 1021class TypedefType : public Type { 1022 TypedefDecl *Decl; 1023protected: 1024 TypedefType(TypeClass tc, TypedefDecl *D, QualType can) 1025 : Type(tc, can), Decl(D) { 1026 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1027 } 1028 friend class ASTContext; // ASTContext creates these. 1029public: 1030 1031 TypedefDecl *getDecl() const { return Decl; } 1032 1033 /// LookThroughTypedefs - Return the ultimate type this typedef corresponds to 1034 /// potentially looking through *all* consequtive typedefs. This returns the 1035 /// sum of the type qualifiers, so if you have: 1036 /// typedef const int A; 1037 /// typedef volatile A B; 1038 /// looking through the typedefs for B will give you "const volatile A". 1039 QualType LookThroughTypedefs() const; 1040 1041 virtual void getAsStringInternal(std::string &InnerString) const; 1042 1043 static bool classof(const Type *T) { return T->getTypeClass() == TypeName; } 1044 static bool classof(const TypedefType *) { return true; } 1045 1046protected: 1047 virtual void EmitImpl(llvm::Serializer& S) const; 1048 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 1049 friend class Type; 1050}; 1051 1052/// TypeOfExpr (GCC extension). 1053class TypeOfExpr : public Type { 1054 Expr *TOExpr; 1055 TypeOfExpr(Expr *E, QualType can) : Type(TypeOfExp, can), TOExpr(E) { 1056 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1057 } 1058 friend class ASTContext; // ASTContext creates these. 1059public: 1060 Expr *getUnderlyingExpr() const { return TOExpr; } 1061 1062 virtual void getAsStringInternal(std::string &InnerString) const; 1063 1064 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExp; } 1065 static bool classof(const TypeOfExpr *) { return true; } 1066}; 1067 1068/// TypeOfType (GCC extension). 1069class TypeOfType : public Type { 1070 QualType TOType; 1071 TypeOfType(QualType T, QualType can) : Type(TypeOfTyp, can), TOType(T) { 1072 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1073 } 1074 friend class ASTContext; // ASTContext creates these. 1075public: 1076 QualType getUnderlyingType() const { return TOType; } 1077 1078 virtual void getAsStringInternal(std::string &InnerString) const; 1079 1080 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfTyp; } 1081 static bool classof(const TypeOfType *) { return true; } 1082}; 1083 1084class TagType : public Type { 1085 TagDecl *decl; 1086 friend class ASTContext; 1087 1088protected: 1089 TagType(TagDecl *D, QualType can) : Type(Tagged, can), decl(D) {} 1090 1091public: 1092 TagDecl *getDecl() const { return decl; } 1093 1094 virtual void getAsStringInternal(std::string &InnerString) const; 1095 1096 static bool classof(const Type *T) { return T->getTypeClass() == Tagged; } 1097 static bool classof(const TagType *) { return true; } 1098 1099protected: 1100 virtual void EmitImpl(llvm::Serializer& S) const; 1101 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 1102 friend class Type; 1103}; 1104 1105/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 1106/// to detect TagType objects of structs/unions/classes. 1107class RecordType : public TagType { 1108protected: 1109 explicit RecordType(RecordDecl *D) 1110 : TagType(reinterpret_cast<TagDecl*>(D), QualType()) { } 1111 friend class ASTContext; // ASTContext creates these. 1112public: 1113 1114 RecordDecl *getDecl() const { 1115 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 1116 } 1117 1118 // FIXME: This predicate is a helper to QualType/Type. It needs to 1119 // recursively check all fields for const-ness. If any field is declared 1120 // const, it needs to return false. 1121 bool hasConstFields() const { return false; } 1122 1123 // FIXME: RecordType needs to check when it is created that all fields are in 1124 // the same address space, and return that. 1125 unsigned getAddressSpace() const { return 0; } 1126 1127 static bool classof(const TagType *T); 1128 static bool classof(const Type *T) { 1129 return isa<TagType>(T) && classof(cast<TagType>(T)); 1130 } 1131 static bool classof(const RecordType *) { return true; } 1132}; 1133 1134/// CXXRecordType - This is a helper class that allows the use of 1135/// isa/cast/dyncast to detect TagType objects of C++ structs/unions/classes. 1136class CXXRecordType : public RecordType { 1137 explicit CXXRecordType(CXXRecordDecl *D) 1138 : RecordType(reinterpret_cast<RecordDecl*>(D)) { } 1139 friend class ASTContext; // ASTContext creates these. 1140public: 1141 1142 CXXRecordDecl *getDecl() const { 1143 return reinterpret_cast<CXXRecordDecl*>(RecordType::getDecl()); 1144 } 1145 1146 static bool classof(const TagType *T); 1147 static bool classof(const Type *T) { 1148 return isa<TagType>(T) && classof(cast<TagType>(T)); 1149 } 1150 static bool classof(const CXXRecordType *) { return true; } 1151}; 1152 1153/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 1154/// to detect TagType objects of enums. 1155class EnumType : public TagType { 1156 explicit EnumType(EnumDecl *D) 1157 : TagType(reinterpret_cast<TagDecl*>(D), QualType()) { } 1158 friend class ASTContext; // ASTContext creates these. 1159public: 1160 1161 EnumDecl *getDecl() const { 1162 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 1163 } 1164 1165 static bool classof(const TagType *T); 1166 static bool classof(const Type *T) { 1167 return isa<TagType>(T) && classof(cast<TagType>(T)); 1168 } 1169 static bool classof(const EnumType *) { return true; } 1170}; 1171 1172 1173 1174/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 1175/// object oriented design. They basically correspond to C++ classes. There 1176/// are two kinds of interface types, normal interfaces like "NSString" and 1177/// qualified interfaces, which are qualified with a protocol list like 1178/// "NSString<NSCopyable, NSAmazing>". Qualified interface types are instances 1179/// of ObjCQualifiedInterfaceType, which is a subclass of ObjCInterfaceType. 1180class ObjCInterfaceType : public Type { 1181 ObjCInterfaceDecl *Decl; 1182protected: 1183 ObjCInterfaceType(TypeClass tc, ObjCInterfaceDecl *D) : 1184 Type(tc, QualType()), Decl(D) { } 1185 friend class ASTContext; // ASTContext creates these. 1186public: 1187 1188 ObjCInterfaceDecl *getDecl() const { return Decl; } 1189 1190 /// qual_iterator and friends: this provides access to the (potentially empty) 1191 /// list of protocols qualifying this interface. If this is an instance of 1192 /// ObjCQualifiedInterfaceType it returns the list, otherwise it returns an 1193 /// empty list if there are no qualifying protocols. 1194 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 1195 inline qual_iterator qual_begin() const; 1196 inline qual_iterator qual_end() const; 1197 bool qual_empty() const { return getTypeClass() != ObjCQualifiedInterface; } 1198 1199 /// getNumProtocols - Return the number of qualifying protocols in this 1200 /// interface type, or 0 if there are none. 1201 inline unsigned getNumProtocols() const; 1202 1203 /// getProtocol - Return the specified qualifying protocol. 1204 inline ObjCProtocolDecl *getProtocol(unsigned i) const; 1205 1206 1207 virtual void getAsStringInternal(std::string &InnerString) const; 1208 static bool classof(const Type *T) { 1209 return T->getTypeClass() == ObjCInterface || 1210 T->getTypeClass() == ObjCQualifiedInterface; 1211 } 1212 static bool classof(const ObjCInterfaceType *) { return true; } 1213}; 1214 1215/// ObjCQualifiedInterfaceType - This class represents interface types 1216/// conforming to a list of protocols, such as INTF<Proto1, Proto2, Proto1>. 1217/// 1218/// Duplicate protocols are removed and protocol list is canonicalized to be in 1219/// alphabetical order. 1220class ObjCQualifiedInterfaceType : public ObjCInterfaceType, 1221 public llvm::FoldingSetNode { 1222 1223 // List of protocols for this protocol conforming object type 1224 // List is sorted on protocol name. No protocol is enterred more than once. 1225 llvm::SmallVector<ObjCProtocolDecl*, 4> Protocols; 1226 1227 ObjCQualifiedInterfaceType(ObjCInterfaceDecl *D, 1228 ObjCProtocolDecl **Protos, unsigned NumP) : 1229 ObjCInterfaceType(ObjCQualifiedInterface, D), 1230 Protocols(Protos, Protos+NumP) { } 1231 friend class ASTContext; // ASTContext creates these. 1232public: 1233 1234 ObjCProtocolDecl *getProtocol(unsigned i) const { 1235 return Protocols[i]; 1236 } 1237 unsigned getNumProtocols() const { 1238 return Protocols.size(); 1239 } 1240 1241 qual_iterator qual_begin() const { return Protocols.begin(); } 1242 qual_iterator qual_end() const { return Protocols.end(); } 1243 1244 virtual void getAsStringInternal(std::string &InnerString) const; 1245 1246 void Profile(llvm::FoldingSetNodeID &ID); 1247 static void Profile(llvm::FoldingSetNodeID &ID, 1248 const ObjCInterfaceDecl *Decl, 1249 ObjCProtocolDecl **protocols, unsigned NumProtocols); 1250 1251 static bool classof(const Type *T) { 1252 return T->getTypeClass() == ObjCQualifiedInterface; 1253 } 1254 static bool classof(const ObjCQualifiedInterfaceType *) { return true; } 1255}; 1256 1257inline ObjCInterfaceType::qual_iterator ObjCInterfaceType::qual_begin() const { 1258 if (const ObjCQualifiedInterfaceType *QIT = 1259 dyn_cast<ObjCQualifiedInterfaceType>(this)) 1260 return QIT->qual_begin(); 1261 return 0; 1262} 1263inline ObjCInterfaceType::qual_iterator ObjCInterfaceType::qual_end() const { 1264 if (const ObjCQualifiedInterfaceType *QIT = 1265 dyn_cast<ObjCQualifiedInterfaceType>(this)) 1266 return QIT->qual_end(); 1267 return 0; 1268} 1269 1270/// getNumProtocols - Return the number of qualifying protocols in this 1271/// interface type, or 0 if there are none. 1272inline unsigned ObjCInterfaceType::getNumProtocols() const { 1273 if (const ObjCQualifiedInterfaceType *QIT = 1274 dyn_cast<ObjCQualifiedInterfaceType>(this)) 1275 return QIT->getNumProtocols(); 1276 return 0; 1277} 1278 1279/// getProtocol - Return the specified qualifying protocol. 1280inline ObjCProtocolDecl *ObjCInterfaceType::getProtocol(unsigned i) const { 1281 return cast<ObjCQualifiedInterfaceType>(this)->getProtocol(i); 1282} 1283 1284 1285 1286/// ObjCQualifiedIdType - to represent id<protocol-list>. 1287/// 1288/// Duplicate protocols are removed and protocol list is canonicalized to be in 1289/// alphabetical order. 1290class ObjCQualifiedIdType : public Type, 1291 public llvm::FoldingSetNode { 1292 // List of protocols for this protocol conforming 'id' type 1293 // List is sorted on protocol name. No protocol is enterred more than once. 1294 llvm::SmallVector<ObjCProtocolDecl*, 8> Protocols; 1295 1296 ObjCQualifiedIdType(ObjCProtocolDecl **Protos, unsigned NumP) 1297 : Type(ObjCQualifiedId, QualType()/*these are always canonical*/), 1298 Protocols(Protos, Protos+NumP) { } 1299 friend class ASTContext; // ASTContext creates these. 1300public: 1301 1302 ObjCProtocolDecl *getProtocols(unsigned i) const { 1303 return Protocols[i]; 1304 } 1305 unsigned getNumProtocols() const { 1306 return Protocols.size(); 1307 } 1308 ObjCProtocolDecl **getReferencedProtocols() { 1309 return &Protocols[0]; 1310 } 1311 1312 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 1313 qual_iterator qual_begin() const { return Protocols.begin(); } 1314 qual_iterator qual_end() const { return Protocols.end(); } 1315 1316 virtual void getAsStringInternal(std::string &InnerString) const; 1317 1318 void Profile(llvm::FoldingSetNodeID &ID); 1319 static void Profile(llvm::FoldingSetNodeID &ID, 1320 ObjCProtocolDecl **protocols, unsigned NumProtocols); 1321 1322 static bool classof(const Type *T) { 1323 return T->getTypeClass() == ObjCQualifiedId; 1324 } 1325 static bool classof(const ObjCQualifiedIdType *) { return true; } 1326 1327}; 1328 1329 1330// Inline function definitions. 1331 1332/// getUnqualifiedType - Return the type without any qualifiers. 1333inline QualType QualType::getUnqualifiedType() const { 1334 Type *TP = getTypePtr(); 1335 if (const ASQualType *ASQT = dyn_cast<ASQualType>(TP)) 1336 TP = ASQT->getBaseType(); 1337 return QualType(TP, 0); 1338} 1339 1340/// getAddressSpace - Return the address space of this type. 1341inline unsigned QualType::getAddressSpace() const { 1342 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 1343 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 1344 return AT->getElementType().getAddressSpace(); 1345 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 1346 return RT->getAddressSpace(); 1347 if (const ASQualType *ASQT = dyn_cast<ASQualType>(CT)) 1348 return ASQT->getAddressSpace(); 1349 return 0; 1350} 1351 1352inline const TypedefType* Type::getAsTypedefType() const { 1353 return dyn_cast<TypedefType>(this); 1354} 1355inline const ObjCInterfaceType *Type::getAsPointerToObjCInterfaceType() const { 1356 if (const PointerType *PT = getAsPointerType()) 1357 return PT->getPointeeType()->getAsObjCInterfaceType(); 1358 return 0; 1359} 1360 1361// NOTE: All of these methods use "getUnqualifiedType" to strip off address 1362// space qualifiers if present. 1363inline bool Type::isFunctionType() const { 1364 return isa<FunctionType>(CanonicalType.getUnqualifiedType()); 1365} 1366inline bool Type::isPointerType() const { 1367 return isa<PointerType>(CanonicalType.getUnqualifiedType()); 1368} 1369inline bool Type::isBlockPointerType() const { 1370 return isa<BlockPointerType>(CanonicalType); 1371} 1372inline bool Type::isReferenceType() const { 1373 return isa<ReferenceType>(CanonicalType.getUnqualifiedType()); 1374} 1375inline bool Type::isPointerLikeType() const { 1376 return isa<PointerLikeType>(CanonicalType.getUnqualifiedType()); 1377} 1378inline bool Type::isFunctionPointerType() const { 1379 if (const PointerType* T = getAsPointerType()) 1380 return T->getPointeeType()->isFunctionType(); 1381 else 1382 return false; 1383} 1384inline bool Type::isArrayType() const { 1385 return isa<ArrayType>(CanonicalType.getUnqualifiedType()); 1386} 1387inline bool Type::isConstantArrayType() const { 1388 return isa<ConstantArrayType>(CanonicalType.getUnqualifiedType()); 1389} 1390inline bool Type::isIncompleteArrayType() const { 1391 return isa<IncompleteArrayType>(CanonicalType.getUnqualifiedType()); 1392} 1393inline bool Type::isVariableArrayType() const { 1394 return isa<VariableArrayType>(CanonicalType.getUnqualifiedType()); 1395} 1396inline bool Type::isRecordType() const { 1397 return isa<RecordType>(CanonicalType.getUnqualifiedType()); 1398} 1399inline bool Type::isAnyComplexType() const { 1400 return isa<ComplexType>(CanonicalType.getUnqualifiedType()); 1401} 1402inline bool Type::isVectorType() const { 1403 return isa<VectorType>(CanonicalType.getUnqualifiedType()); 1404} 1405inline bool Type::isExtVectorType() const { 1406 return isa<ExtVectorType>(CanonicalType.getUnqualifiedType()); 1407} 1408inline bool Type::isObjCInterfaceType() const { 1409 return isa<ObjCInterfaceType>(CanonicalType.getUnqualifiedType()); 1410} 1411inline bool Type::isObjCQualifiedInterfaceType() const { 1412 return isa<ObjCQualifiedInterfaceType>(CanonicalType.getUnqualifiedType()); 1413} 1414inline bool Type::isObjCQualifiedIdType() const { 1415 return isa<ObjCQualifiedIdType>(CanonicalType.getUnqualifiedType()); 1416} 1417} // end namespace clang 1418 1419#endif 1420