Type.h revision 0218936235b137bbdcd29a6c36d61d9215bb4edd
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 QualType getUnqualifiedType() const; 162 bool isMoreQualifiedThan(QualType Other) const; 163 bool isAtLeastAsQualifiedAs(QualType Other) const; 164 QualType getNonReferenceType() const; 165 166 167 /// operator==/!= - Indicate whether the specified types and qualifiers are 168 /// identical. 169 bool operator==(const QualType &RHS) const { 170 return ThePtr == RHS.ThePtr; 171 } 172 bool operator!=(const QualType &RHS) const { 173 return ThePtr != RHS.ThePtr; 174 } 175 std::string getAsString() const { 176 std::string S; 177 getAsStringInternal(S); 178 return S; 179 } 180 void getAsStringInternal(std::string &Str) const; 181 182 void dump(const char *s) const; 183 void dump() const; 184 185 /// viewInheritance - Renders and displays an inheritance diagram 186 /// for a C++ class and all of its base classes (transitively) using 187 /// GraphViz. Only available in debug builds. 188 void viewInheritance(ASTContext& Context); 189 190 void Profile(llvm::FoldingSetNodeID &ID) const { 191 ID.AddPointer(getAsOpaquePtr()); 192 } 193 194public: 195 196 /// getAddressSpace - Return the address space of this type. 197 inline unsigned getAddressSpace() const; 198 199 /// Emit - Serialize a QualType to Bitcode. 200 void Emit(llvm::Serializer& S) const; 201 202 /// Read - Deserialize a QualType from Bitcode. 203 static QualType ReadVal(llvm::Deserializer& D); 204 205 void ReadBackpatch(llvm::Deserializer& D); 206}; 207 208} // end clang. 209 210namespace llvm { 211/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 212/// to a specific Type class. 213template<> struct simplify_type<const ::clang::QualType> { 214 typedef ::clang::Type* SimpleType; 215 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 216 return Val.getTypePtr(); 217 } 218}; 219template<> struct simplify_type< ::clang::QualType> 220 : public simplify_type<const ::clang::QualType> {}; 221 222} // end namespace llvm 223 224namespace clang { 225 226/// Type - This is the base class of the type hierarchy. A central concept 227/// with types is that each type always has a canonical type. A canonical type 228/// is the type with any typedef names stripped out of it or the types it 229/// references. For example, consider: 230/// 231/// typedef int foo; 232/// typedef foo* bar; 233/// 'int *' 'foo *' 'bar' 234/// 235/// There will be a Type object created for 'int'. Since int is canonical, its 236/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 237/// TypeNameType). Its CanonicalType pointer points to the 'int' Type. Next 238/// there is a PointerType that represents 'int*', which, like 'int', is 239/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 240/// type is 'int*', and there is a TypeNameType for 'bar', whose canonical type 241/// is also 'int*'. 242/// 243/// Non-canonical types are useful for emitting diagnostics, without losing 244/// information about typedefs being used. Canonical types are useful for type 245/// comparisons (they allow by-pointer equality tests) and useful for reasoning 246/// about whether something has a particular form (e.g. is a function type), 247/// because they implicitly, recursively, strip all typedefs out of a type. 248/// 249/// Types, once created, are immutable. 250/// 251class Type { 252public: 253 enum TypeClass { 254 Builtin, Complex, Pointer, Reference, 255 ConstantArray, VariableArray, IncompleteArray, 256 Vector, ExtVector, 257 FunctionNoProto, FunctionProto, 258 TypeName, Tagged, ASQual, 259 ObjCInterface, ObjCQualifiedInterface, 260 ObjCQualifiedId, 261 TypeOfExp, TypeOfTyp, // GNU typeof extension. 262 BlockPointer // C extension 263 }; 264private: 265 QualType CanonicalType; 266 267 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 268 /// Note that this should stay at the end of the ivars for Type so that 269 /// subclasses can pack their bitfields into the same word. 270 unsigned TC : 5; 271protected: 272 // silence VC++ warning C4355: 'this' : used in base member initializer list 273 Type *this_() { return this; } 274 Type(TypeClass tc, QualType Canonical) 275 : CanonicalType(Canonical.isNull() ? QualType(this_(), 0) : Canonical), 276 TC(tc) {} 277 virtual ~Type() {}; 278 virtual void Destroy(ASTContext& C); 279 friend class ASTContext; 280 281 void EmitTypeInternal(llvm::Serializer& S) const; 282 void ReadTypeInternal(llvm::Deserializer& D); 283 284public: 285 TypeClass getTypeClass() const { return static_cast<TypeClass>(TC); } 286 287 bool isCanonical() const { return CanonicalType.getTypePtr() == this; } 288 289 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 290 /// object types, function types, and incomplete types. 291 292 /// isObjectType - types that fully describe objects. An object is a region 293 /// of memory that can be examined and stored into (H&S). 294 bool isObjectType() const; 295 296 /// isIncompleteType - Return true if this is an incomplete type. 297 /// A type that can describe objects, but which lacks information needed to 298 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 299 /// routine will need to determine if the size is actually required. 300 bool isIncompleteType() const; 301 302 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 303 /// type, in other words, not a function type. 304 bool isIncompleteOrObjectType() const { 305 return !isFunctionType(); 306 } 307 308 /// isVariablyModifiedType (C99 6.7.5.2p2) - Return true for variable array 309 /// types that have a non-constant expression. This does not include "[]". 310 bool isVariablyModifiedType() const; 311 312 /// Helper methods to distinguish type categories. All type predicates 313 /// operate on the canonical type, ignoring typedefs and qualifiers. 314 315 /// isIntegerType() does *not* include complex integers (a GCC extension). 316 /// isComplexIntegerType() can be used to test for complex integers. 317 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 318 bool isEnumeralType() const; 319 bool isBooleanType() const; 320 bool isCharType() const; 321 bool isWideCharType() const; 322 bool isIntegralType() const; 323 324 /// Floating point categories. 325 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 326 /// isComplexType() does *not* include complex integers (a GCC extension). 327 /// isComplexIntegerType() can be used to test for complex integers. 328 bool isComplexType() const; // C99 6.2.5p11 (complex) 329 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 330 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 331 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 332 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 333 bool isVoidType() const; // C99 6.2.5p19 334 bool isDerivedType() const; // C99 6.2.5p20 335 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 336 bool isAggregateType() const; // C99 6.2.5p21 (arrays, structures) 337 338 // Type Predicates: Check to see if this type is structurally the specified 339 // type, ignoring typedefs and qualifiers. 340 bool isFunctionType() const; 341 bool isPointerLikeType() const; // Pointer or Reference. 342 bool isPointerType() const; 343 bool isBlockPointerType() const; 344 bool isReferenceType() const; 345 bool isFunctionPointerType() const; 346 bool isArrayType() const; 347 bool isConstantArrayType() const; 348 bool isIncompleteArrayType() const; 349 bool isVariableArrayType() const; 350 bool isRecordType() const; 351 bool isClassType() const; 352 bool isStructureType() const; 353 bool isUnionType() const; 354 bool isComplexIntegerType() const; // GCC _Complex integer type. 355 bool isVectorType() const; // GCC vector type. 356 bool isExtVectorType() const; // Extended vector type. 357 bool isObjCInterfaceType() const; // NSString or NSString<foo> 358 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 359 bool isObjCQualifiedIdType() const; // id<foo> 360 361 // Type Checking Functions: Check to see if this type is structurally the 362 // specified type, ignoring typedefs and qualifiers, and return a pointer to 363 // the best type we can. 364 const BuiltinType *getAsBuiltinType() const; 365 const FunctionType *getAsFunctionType() const; 366 const FunctionTypeProto *getAsFunctionTypeProto() const; 367 const PointerLikeType *getAsPointerLikeType() const; // Pointer or Reference. 368 const PointerType *getAsPointerType() const; 369 const BlockPointerType *getAsBlockPointerType() const; 370 const ReferenceType *getAsReferenceType() const; 371 const RecordType *getAsRecordType() const; 372 const RecordType *getAsStructureType() const; 373 /// NOTE: getAsArrayType* are methods on ASTContext. 374 const TypedefType *getAsTypedefType() const; 375 const RecordType *getAsUnionType() const; 376 const EnumType *getAsEnumType() const; 377 const VectorType *getAsVectorType() const; // GCC vector type. 378 const ComplexType *getAsComplexType() const; 379 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 380 const ExtVectorType *getAsExtVectorType() const; // Extended vector type. 381 const ObjCInterfaceType *getAsObjCInterfaceType() const; 382 const ObjCQualifiedInterfaceType *getAsObjCQualifiedInterfaceType() const; 383 const ObjCQualifiedIdType *getAsObjCQualifiedIdType() const; 384 385 /// getAsPointerToObjCInterfaceType - If this is a pointer to an ObjC 386 /// interface, return the interface type, otherwise return null. 387 const ObjCInterfaceType *getAsPointerToObjCInterfaceType() const; 388 389 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 390 /// element type of the array, potentially with type qualifiers missing. 391 /// This method should never be used when type qualifiers are meaningful. 392 const Type *getArrayElementTypeNoTypeQual() const; 393 394 395 396 /// getDesugaredType - Return the specified type with any "sugar" removed from 397 /// the type. This takes off typedefs, typeof's etc. If the outer level of 398 /// the type is already concrete, it returns it unmodified. This is similar 399 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 400 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 401 /// concrete. 402 QualType getDesugaredType() const; 403 404 /// More type predicates useful for type checking/promotion 405 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 406 407 /// isSignedIntegerType - Return true if this is an integer type that is 408 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 409 /// an enum decl which has a signed representation, or a vector of signed 410 /// integer element type. 411 bool isSignedIntegerType() const; 412 413 /// isUnsignedIntegerType - Return true if this is an integer type that is 414 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 415 /// decl which has an unsigned representation, or a vector of unsigned integer 416 /// element type. 417 bool isUnsignedIntegerType() const; 418 419 /// isConstantSizeType - Return true if this is not a variable sized type, 420 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 421 /// incomplete types. 422 bool isConstantSizeType() const; 423 424 QualType getCanonicalTypeInternal() const { return CanonicalType; } 425 void dump() const; 426 virtual void getAsStringInternal(std::string &InnerString) const = 0; 427 static bool classof(const Type *) { return true; } 428 429protected: 430 /// Emit - Emit a Type to bitcode. Used by ASTContext. 431 void Emit(llvm::Serializer& S) const; 432 433 /// Create - Construct a Type from bitcode. Used by ASTContext. 434 static void Create(ASTContext& Context, unsigned i, llvm::Deserializer& S); 435 436 /// EmitImpl - Subclasses must implement this method in order to 437 /// be serialized. 438 // FIXME: Make this abstract once implemented. 439 virtual void EmitImpl(llvm::Serializer& S) const { 440 assert (false && "Serializization for type not supported."); 441 } 442}; 443 444/// ASQualType - TR18037 (C embedded extensions) 6.2.5p26 445/// This supports address space qualified types. 446/// 447class ASQualType : public Type, public llvm::FoldingSetNode { 448 /// BaseType - This is the underlying type that this qualifies. All CVR 449 /// qualifiers are stored on the QualType that references this type, so we 450 /// can't have any here. 451 Type *BaseType; 452 /// Address Space ID - The address space ID this type is qualified with. 453 unsigned AddressSpace; 454 ASQualType(Type *Base, QualType CanonicalPtr, unsigned AddrSpace) : 455 Type(ASQual, CanonicalPtr), BaseType(Base), AddressSpace(AddrSpace) { 456 } 457 friend class ASTContext; // ASTContext creates these. 458public: 459 Type *getBaseType() const { return BaseType; } 460 unsigned getAddressSpace() const { return AddressSpace; } 461 462 virtual void getAsStringInternal(std::string &InnerString) const; 463 464 void Profile(llvm::FoldingSetNodeID &ID) { 465 Profile(ID, getBaseType(), AddressSpace); 466 } 467 static void Profile(llvm::FoldingSetNodeID &ID, Type *Base, 468 unsigned AddrSpace) { 469 ID.AddPointer(Base); 470 ID.AddInteger(AddrSpace); 471 } 472 473 static bool classof(const Type *T) { return T->getTypeClass() == ASQual; } 474 static bool classof(const ASQualType *) { return true; } 475 476protected: 477 virtual void EmitImpl(llvm::Serializer& S) const; 478 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 479 friend class Type; 480}; 481 482 483/// BuiltinType - This class is used for builtin types like 'int'. Builtin 484/// types are always canonical and have a literal name field. 485class BuiltinType : public Type { 486public: 487 enum Kind { 488 Void, 489 490 Bool, // This is bool and/or _Bool. 491 Char_U, // This is 'char' for targets where char is unsigned. 492 UChar, // This is explicitly qualified unsigned char. 493 UShort, 494 UInt, 495 ULong, 496 ULongLong, 497 498 Char_S, // This is 'char' for targets where char is signed. 499 SChar, // This is explicitly qualified signed char. 500 WChar, // This is 'wchar_t' for C++. 501 Short, 502 Int, 503 Long, 504 LongLong, 505 506 Float, Double, LongDouble, 507 508 Overload // This represents the type of an overloaded function declaration. 509 }; 510private: 511 Kind TypeKind; 512public: 513 BuiltinType(Kind K) : Type(Builtin, QualType()), TypeKind(K) {} 514 515 Kind getKind() const { return TypeKind; } 516 const char *getName() const; 517 518 virtual void getAsStringInternal(std::string &InnerString) const; 519 520 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 521 static bool classof(const BuiltinType *) { return true; } 522}; 523 524/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 525/// types (_Complex float etc) as well as the GCC integer complex extensions. 526/// 527class ComplexType : public Type, public llvm::FoldingSetNode { 528 QualType ElementType; 529 ComplexType(QualType Element, QualType CanonicalPtr) : 530 Type(Complex, CanonicalPtr), ElementType(Element) { 531 } 532 friend class ASTContext; // ASTContext creates these. 533public: 534 QualType getElementType() const { return ElementType; } 535 536 virtual void getAsStringInternal(std::string &InnerString) const; 537 538 void Profile(llvm::FoldingSetNodeID &ID) { 539 Profile(ID, getElementType()); 540 } 541 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 542 ID.AddPointer(Element.getAsOpaquePtr()); 543 } 544 545 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 546 static bool classof(const ComplexType *) { return true; } 547 548protected: 549 virtual void EmitImpl(llvm::Serializer& S) const; 550 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 551 friend class Type; 552}; 553 554/// PointerLikeType - Common base class for pointers and references. 555/// FIXME: Add more documentation on this classes design point. For example, 556/// should BlockPointerType inherit from it? Is the concept of a PointerLikeType 557/// in the C++ standard? 558/// 559class PointerLikeType : public Type { 560 QualType PointeeType; 561protected: 562 PointerLikeType(TypeClass K, QualType Pointee, QualType CanonicalPtr) : 563 Type(K, CanonicalPtr), PointeeType(Pointee) { 564 } 565public: 566 567 QualType getPointeeType() const { return PointeeType; } 568 569 static bool classof(const Type *T) { 570 return T->getTypeClass() == Pointer || T->getTypeClass() == Reference; 571 } 572 static bool classof(const PointerLikeType *) { return true; } 573}; 574 575/// PointerType - C99 6.7.5.1 - Pointer Declarators. 576/// 577class PointerType : public PointerLikeType, public llvm::FoldingSetNode { 578 PointerType(QualType Pointee, QualType CanonicalPtr) : 579 PointerLikeType(Pointer, Pointee, CanonicalPtr) { 580 } 581 friend class ASTContext; // ASTContext creates these. 582public: 583 584 virtual void getAsStringInternal(std::string &InnerString) const; 585 586 void Profile(llvm::FoldingSetNodeID &ID) { 587 Profile(ID, getPointeeType()); 588 } 589 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 590 ID.AddPointer(Pointee.getAsOpaquePtr()); 591 } 592 593 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 594 static bool classof(const PointerType *) { return true; } 595 596protected: 597 virtual void EmitImpl(llvm::Serializer& S) const; 598 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 599 friend class Type; 600}; 601 602/// BlockPointerType - pointer to a block type. 603/// This type is to represent types syntactically represented as 604/// "void (^)(int)", etc. Pointee is required to always be a function type. 605/// FIXME: Should BlockPointerType inherit from PointerLikeType? It could 606/// simplfy some type checking code, however PointerLikeType doesn't appear 607/// to be used by the type checker. 608/// 609class BlockPointerType : public Type, public llvm::FoldingSetNode { 610 QualType PointeeType; // Block is some kind of pointer type 611 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 612 Type(BlockPointer, CanonicalCls), PointeeType(Pointee) { 613 } 614 friend class ASTContext; // ASTContext creates these. 615public: 616 617 // Get the pointee type. Pointee is required to always be a function type. 618 QualType getPointeeType() const { return PointeeType; } 619 620 virtual void getAsStringInternal(std::string &InnerString) const; 621 622 void Profile(llvm::FoldingSetNodeID &ID) { 623 Profile(ID, getPointeeType()); 624 } 625 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 626 ID.AddPointer(Pointee.getAsOpaquePtr()); 627 } 628 629 static bool classof(const Type *T) { 630 return T->getTypeClass() == BlockPointer; 631 } 632 static bool classof(const BlockPointerType *) { return true; } 633 634 protected: 635 virtual void EmitImpl(llvm::Serializer& S) const; 636 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 637 friend class Type; 638}; 639 640/// ReferenceType - C++ 8.3.2 - Reference Declarators. 641/// 642class ReferenceType : public PointerLikeType, public llvm::FoldingSetNode { 643 ReferenceType(QualType Referencee, QualType CanonicalRef) : 644 PointerLikeType(Reference, Referencee, CanonicalRef) { 645 } 646 friend class ASTContext; // ASTContext creates these. 647public: 648 virtual void getAsStringInternal(std::string &InnerString) const; 649 650 void Profile(llvm::FoldingSetNodeID &ID) { 651 Profile(ID, getPointeeType()); 652 } 653 static void Profile(llvm::FoldingSetNodeID &ID, QualType Referencee) { 654 ID.AddPointer(Referencee.getAsOpaquePtr()); 655 } 656 657 static bool classof(const Type *T) { return T->getTypeClass() == Reference; } 658 static bool classof(const ReferenceType *) { return true; } 659}; 660 661/// ArrayType - C99 6.7.5.2 - Array Declarators. 662/// 663class ArrayType : public Type, public llvm::FoldingSetNode { 664public: 665 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 666 /// an array with a static size (e.g. int X[static 4]), or with a star size 667 /// (e.g. int X[*]). 'static' is only allowed on function parameters. 668 enum ArraySizeModifier { 669 Normal, Static, Star 670 }; 671private: 672 /// ElementType - The element type of the array. 673 QualType ElementType; 674 675 // NOTE: VC++ treats enums as signed, avoid using the ArraySizeModifier enum 676 /// NOTE: These fields are packed into the bitfields space in the Type class. 677 unsigned SizeModifier : 2; 678 679 /// IndexTypeQuals - Capture qualifiers in declarations like: 680 /// 'int X[static restrict 4]'. For function parameters only. 681 unsigned IndexTypeQuals : 3; 682 683protected: 684 ArrayType(TypeClass tc, QualType et, QualType can, 685 ArraySizeModifier sm, unsigned tq) 686 : Type(tc, can), ElementType(et), SizeModifier(sm), IndexTypeQuals(tq) {} 687 friend class ASTContext; // ASTContext creates these. 688public: 689 QualType getElementType() const { return ElementType; } 690 ArraySizeModifier getSizeModifier() const { 691 return ArraySizeModifier(SizeModifier); 692 } 693 unsigned getIndexTypeQualifier() const { return IndexTypeQuals; } 694 695 static bool classof(const Type *T) { 696 return T->getTypeClass() == ConstantArray || 697 T->getTypeClass() == VariableArray || 698 T->getTypeClass() == IncompleteArray; 699 } 700 static bool classof(const ArrayType *) { return true; } 701}; 702 703/// ConstantArrayType - This class represents C arrays with a specified constant 704/// size. For example 'int A[100]' has ConstantArrayType where the element type 705/// is 'int' and the size is 100. 706class ConstantArrayType : public ArrayType { 707 llvm::APInt Size; // Allows us to unique the type. 708 709 ConstantArrayType(QualType et, QualType can, llvm::APInt sz, 710 ArraySizeModifier sm, unsigned tq) 711 : ArrayType(ConstantArray, et, can, sm, tq), Size(sz) {} 712 friend class ASTContext; // ASTContext creates these. 713public: 714 const llvm::APInt &getSize() const { return Size; } 715 virtual void getAsStringInternal(std::string &InnerString) const; 716 717 void Profile(llvm::FoldingSetNodeID &ID) { 718 Profile(ID, getElementType(), getSize()); 719 } 720 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 721 llvm::APInt ArraySize) { 722 ID.AddPointer(ET.getAsOpaquePtr()); 723 ID.AddInteger(ArraySize.getZExtValue()); 724 } 725 static bool classof(const Type *T) { 726 return T->getTypeClass() == ConstantArray; 727 } 728 static bool classof(const ConstantArrayType *) { return true; } 729 730protected: 731 virtual void EmitImpl(llvm::Serializer& S) const; 732 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 733 friend class Type; 734}; 735 736/// IncompleteArrayType - This class represents C arrays with an unspecified 737/// size. For example 'int A[]' has an IncompleteArrayType where the element 738/// type is 'int' and the size is unspecified. 739class IncompleteArrayType : public ArrayType { 740 IncompleteArrayType(QualType et, QualType can, 741 ArraySizeModifier sm, unsigned tq) 742 : ArrayType(IncompleteArray, et, can, sm, tq) {} 743 friend class ASTContext; // ASTContext creates these. 744public: 745 746 virtual void getAsStringInternal(std::string &InnerString) const; 747 748 static bool classof(const Type *T) { 749 return T->getTypeClass() == IncompleteArray; 750 } 751 static bool classof(const IncompleteArrayType *) { return true; } 752 753 friend class StmtIteratorBase; 754 755 void Profile(llvm::FoldingSetNodeID &ID) { 756 Profile(ID, getElementType()); 757 } 758 759 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET) { 760 ID.AddPointer(ET.getAsOpaquePtr()); 761 } 762 763protected: 764 virtual void EmitImpl(llvm::Serializer& S) const; 765 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 766 friend class Type; 767}; 768 769/// VariableArrayType - This class represents C arrays with a specified size 770/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 771/// Since the size expression is an arbitrary expression, we store it as such. 772/// 773/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 774/// should not be: two lexically equivalent variable array types could mean 775/// different things, for example, these variables do not have the same type 776/// dynamically: 777/// 778/// void foo(int x) { 779/// int Y[x]; 780/// ++x; 781/// int Z[x]; 782/// } 783/// 784class VariableArrayType : public ArrayType { 785 /// SizeExpr - An assignment expression. VLA's are only permitted within 786 /// a function block. 787 Stmt *SizeExpr; 788 789 VariableArrayType(QualType et, QualType can, Expr *e, 790 ArraySizeModifier sm, unsigned tq) 791 : ArrayType(VariableArray, et, can, sm, tq), SizeExpr((Stmt*) e) {} 792 friend class ASTContext; // ASTContext creates these. 793 virtual void Destroy(ASTContext& C); 794 795public: 796 Expr *getSizeExpr() const { 797 // We use C-style casts instead of cast<> here because we do not wish 798 // to have a dependency of Type.h on Stmt.h/Expr.h. 799 return (Expr*) SizeExpr; 800 } 801 802 virtual void getAsStringInternal(std::string &InnerString) const; 803 804 static bool classof(const Type *T) { 805 return T->getTypeClass() == VariableArray; 806 } 807 static bool classof(const VariableArrayType *) { return true; } 808 809 friend class StmtIteratorBase; 810 811 void Profile(llvm::FoldingSetNodeID &ID) { 812 assert (0 && "Cannnot unique VariableArrayTypes."); 813 } 814 815protected: 816 virtual void EmitImpl(llvm::Serializer& S) const; 817 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 818 friend class Type; 819}; 820 821/// VectorType - GCC generic vector type. This type is created using 822/// __attribute__((vector_size(n)), where "n" specifies the vector size in 823/// bytes. Since the constructor takes the number of vector elements, the 824/// client is responsible for converting the size into the number of elements. 825class VectorType : public Type, public llvm::FoldingSetNode { 826protected: 827 /// ElementType - The element type of the vector. 828 QualType ElementType; 829 830 /// NumElements - The number of elements in the vector. 831 unsigned NumElements; 832 833 VectorType(QualType vecType, unsigned nElements, QualType canonType) : 834 Type(Vector, canonType), ElementType(vecType), NumElements(nElements) {} 835 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 836 QualType canonType) : Type(tc, canonType), ElementType(vecType), 837 NumElements(nElements) {} 838 friend class ASTContext; // ASTContext creates these. 839public: 840 841 QualType getElementType() const { return ElementType; } 842 unsigned getNumElements() const { return NumElements; } 843 844 virtual void getAsStringInternal(std::string &InnerString) const; 845 846 void Profile(llvm::FoldingSetNodeID &ID) { 847 Profile(ID, getElementType(), getNumElements(), getTypeClass()); 848 } 849 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 850 unsigned NumElements, TypeClass TypeClass) { 851 ID.AddPointer(ElementType.getAsOpaquePtr()); 852 ID.AddInteger(NumElements); 853 ID.AddInteger(TypeClass); 854 } 855 static bool classof(const Type *T) { 856 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 857 } 858 static bool classof(const VectorType *) { return true; } 859}; 860 861/// ExtVectorType - Extended vector type. This type is created using 862/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 863/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 864/// class enables syntactic extensions, like Vector Components for accessing 865/// points, colors, and textures (modeled after OpenGL Shading Language). 866class ExtVectorType : public VectorType { 867 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 868 VectorType(ExtVector, vecType, nElements, canonType) {} 869 friend class ASTContext; // ASTContext creates these. 870public: 871 static int getPointAccessorIdx(char c) { 872 switch (c) { 873 default: return -1; 874 case 'x': return 0; 875 case 'y': return 1; 876 case 'z': return 2; 877 case 'w': return 3; 878 } 879 } 880 static int getColorAccessorIdx(char c) { 881 switch (c) { 882 default: return -1; 883 case 'r': return 0; 884 case 'g': return 1; 885 case 'b': return 2; 886 case 'a': return 3; 887 } 888 } 889 static int getTextureAccessorIdx(char c) { 890 switch (c) { 891 default: return -1; 892 case 's': return 0; 893 case 't': return 1; 894 case 'p': return 2; 895 case 'q': return 3; 896 } 897 }; 898 899 static int getAccessorIdx(char c) { 900 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 901 if (int idx = getColorAccessorIdx(c)+1) return idx-1; 902 return getTextureAccessorIdx(c); 903 } 904 905 bool isAccessorWithinNumElements(char c) const { 906 if (int idx = getAccessorIdx(c)+1) 907 return unsigned(idx-1) < NumElements; 908 return false; 909 } 910 virtual void getAsStringInternal(std::string &InnerString) const; 911 912 static bool classof(const Type *T) { 913 return T->getTypeClass() == ExtVector; 914 } 915 static bool classof(const ExtVectorType *) { return true; } 916}; 917 918/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 919/// class of FunctionTypeNoProto and FunctionTypeProto. 920/// 921class FunctionType : public Type { 922 /// SubClassData - This field is owned by the subclass, put here to pack 923 /// tightly with the ivars in Type. 924 bool SubClassData : 1; 925 926 // The type returned by the function. 927 QualType ResultType; 928protected: 929 FunctionType(TypeClass tc, QualType res, bool SubclassInfo,QualType Canonical) 930 : Type(tc, Canonical), SubClassData(SubclassInfo), ResultType(res) {} 931 bool getSubClassData() const { return SubClassData; } 932public: 933 934 QualType getResultType() const { return ResultType; } 935 936 937 static bool classof(const Type *T) { 938 return T->getTypeClass() == FunctionNoProto || 939 T->getTypeClass() == FunctionProto; 940 } 941 static bool classof(const FunctionType *) { return true; } 942}; 943 944/// FunctionTypeNoProto - Represents a K&R-style 'int foo()' function, which has 945/// no information available about its arguments. 946class FunctionTypeNoProto : public FunctionType, public llvm::FoldingSetNode { 947 FunctionTypeNoProto(QualType Result, QualType Canonical) 948 : FunctionType(FunctionNoProto, Result, false, Canonical) {} 949 friend class ASTContext; // ASTContext creates these. 950public: 951 // No additional state past what FunctionType provides. 952 953 virtual void getAsStringInternal(std::string &InnerString) const; 954 955 void Profile(llvm::FoldingSetNodeID &ID) { 956 Profile(ID, getResultType()); 957 } 958 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType) { 959 ID.AddPointer(ResultType.getAsOpaquePtr()); 960 } 961 962 static bool classof(const Type *T) { 963 return T->getTypeClass() == FunctionNoProto; 964 } 965 static bool classof(const FunctionTypeNoProto *) { return true; } 966 967protected: 968 virtual void EmitImpl(llvm::Serializer& S) const; 969 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 970 friend class Type; 971}; 972 973/// FunctionTypeProto - Represents a prototype with argument type info, e.g. 974/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 975/// arguments, not as having a single void argument. 976class FunctionTypeProto : public FunctionType, public llvm::FoldingSetNode { 977 FunctionTypeProto(QualType Result, const QualType *ArgArray, unsigned numArgs, 978 bool isVariadic, QualType Canonical) 979 : FunctionType(FunctionProto, Result, isVariadic, Canonical), 980 NumArgs(numArgs) { 981 // Fill in the trailing argument array. 982 QualType *ArgInfo = reinterpret_cast<QualType *>(this+1);; 983 for (unsigned i = 0; i != numArgs; ++i) 984 ArgInfo[i] = ArgArray[i]; 985 } 986 987 /// NumArgs - The number of arguments this function has, not counting '...'. 988 unsigned NumArgs; 989 990 /// ArgInfo - There is an variable size array after the class in memory that 991 /// holds the argument types. 992 993 friend class ASTContext; // ASTContext creates these. 994 virtual void Destroy(ASTContext& C); 995 996public: 997 unsigned getNumArgs() const { return NumArgs; } 998 QualType getArgType(unsigned i) const { 999 assert(i < NumArgs && "Invalid argument number!"); 1000 return arg_type_begin()[i]; 1001 } 1002 1003 bool isVariadic() const { return getSubClassData(); } 1004 1005 typedef const QualType *arg_type_iterator; 1006 arg_type_iterator arg_type_begin() const { 1007 return reinterpret_cast<const QualType *>(this+1); 1008 } 1009 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 1010 1011 virtual void getAsStringInternal(std::string &InnerString) const; 1012 1013 static bool classof(const Type *T) { 1014 return T->getTypeClass() == FunctionProto; 1015 } 1016 static bool classof(const FunctionTypeProto *) { return true; } 1017 1018 void Profile(llvm::FoldingSetNodeID &ID); 1019 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 1020 arg_type_iterator ArgTys, unsigned NumArgs, 1021 bool isVariadic); 1022 1023protected: 1024 virtual void EmitImpl(llvm::Serializer& S) const; 1025 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 1026 friend class Type; 1027}; 1028 1029 1030class TypedefType : public Type { 1031 TypedefDecl *Decl; 1032protected: 1033 TypedefType(TypeClass tc, TypedefDecl *D, QualType can) 1034 : Type(tc, can), Decl(D) { 1035 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1036 } 1037 friend class ASTContext; // ASTContext creates these. 1038public: 1039 1040 TypedefDecl *getDecl() const { return Decl; } 1041 1042 /// LookThroughTypedefs - Return the ultimate type this typedef corresponds to 1043 /// potentially looking through *all* consequtive typedefs. This returns the 1044 /// sum of the type qualifiers, so if you have: 1045 /// typedef const int A; 1046 /// typedef volatile A B; 1047 /// looking through the typedefs for B will give you "const volatile A". 1048 QualType LookThroughTypedefs() const; 1049 1050 virtual void getAsStringInternal(std::string &InnerString) const; 1051 1052 static bool classof(const Type *T) { return T->getTypeClass() == TypeName; } 1053 static bool classof(const TypedefType *) { return true; } 1054 1055protected: 1056 virtual void EmitImpl(llvm::Serializer& S) const; 1057 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 1058 friend class Type; 1059}; 1060 1061/// TypeOfExpr (GCC extension). 1062class TypeOfExpr : public Type { 1063 Expr *TOExpr; 1064 TypeOfExpr(Expr *E, QualType can) : Type(TypeOfExp, can), TOExpr(E) { 1065 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1066 } 1067 friend class ASTContext; // ASTContext creates these. 1068public: 1069 Expr *getUnderlyingExpr() const { return TOExpr; } 1070 1071 virtual void getAsStringInternal(std::string &InnerString) const; 1072 1073 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExp; } 1074 static bool classof(const TypeOfExpr *) { return true; } 1075}; 1076 1077/// TypeOfType (GCC extension). 1078class TypeOfType : public Type { 1079 QualType TOType; 1080 TypeOfType(QualType T, QualType can) : Type(TypeOfTyp, can), TOType(T) { 1081 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1082 } 1083 friend class ASTContext; // ASTContext creates these. 1084public: 1085 QualType getUnderlyingType() const { return TOType; } 1086 1087 virtual void getAsStringInternal(std::string &InnerString) const; 1088 1089 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfTyp; } 1090 static bool classof(const TypeOfType *) { return true; } 1091}; 1092 1093class TagType : public Type { 1094 TagDecl *decl; 1095 friend class ASTContext; 1096 1097protected: 1098 TagType(TagDecl *D, QualType can) : Type(Tagged, can), decl(D) {} 1099 1100public: 1101 TagDecl *getDecl() const { return decl; } 1102 1103 virtual void getAsStringInternal(std::string &InnerString) const; 1104 1105 static bool classof(const Type *T) { return T->getTypeClass() == Tagged; } 1106 static bool classof(const TagType *) { return true; } 1107 1108protected: 1109 virtual void EmitImpl(llvm::Serializer& S) const; 1110 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 1111 friend class Type; 1112}; 1113 1114/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 1115/// to detect TagType objects of structs/unions/classes. 1116class RecordType : public TagType { 1117protected: 1118 explicit RecordType(RecordDecl *D) 1119 : TagType(reinterpret_cast<TagDecl*>(D), QualType()) { } 1120 friend class ASTContext; // ASTContext creates these. 1121public: 1122 1123 RecordDecl *getDecl() const { 1124 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 1125 } 1126 1127 // FIXME: This predicate is a helper to QualType/Type. It needs to 1128 // recursively check all fields for const-ness. If any field is declared 1129 // const, it needs to return false. 1130 bool hasConstFields() const { return false; } 1131 1132 // FIXME: RecordType needs to check when it is created that all fields are in 1133 // the same address space, and return that. 1134 unsigned getAddressSpace() const { return 0; } 1135 1136 static bool classof(const TagType *T); 1137 static bool classof(const Type *T) { 1138 return isa<TagType>(T) && classof(cast<TagType>(T)); 1139 } 1140 static bool classof(const RecordType *) { return true; } 1141}; 1142 1143/// CXXRecordType - This is a helper class that allows the use of 1144/// isa/cast/dyncast to detect TagType objects of C++ structs/unions/classes. 1145class CXXRecordType : public RecordType { 1146 explicit CXXRecordType(CXXRecordDecl *D) 1147 : RecordType(reinterpret_cast<RecordDecl*>(D)) { } 1148 friend class ASTContext; // ASTContext creates these. 1149public: 1150 1151 CXXRecordDecl *getDecl() const { 1152 return reinterpret_cast<CXXRecordDecl*>(RecordType::getDecl()); 1153 } 1154 1155 static bool classof(const TagType *T); 1156 static bool classof(const Type *T) { 1157 return isa<TagType>(T) && classof(cast<TagType>(T)); 1158 } 1159 static bool classof(const CXXRecordType *) { return true; } 1160}; 1161 1162/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 1163/// to detect TagType objects of enums. 1164class EnumType : public TagType { 1165 explicit EnumType(EnumDecl *D) 1166 : TagType(reinterpret_cast<TagDecl*>(D), QualType()) { } 1167 friend class ASTContext; // ASTContext creates these. 1168public: 1169 1170 EnumDecl *getDecl() const { 1171 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 1172 } 1173 1174 static bool classof(const TagType *T); 1175 static bool classof(const Type *T) { 1176 return isa<TagType>(T) && classof(cast<TagType>(T)); 1177 } 1178 static bool classof(const EnumType *) { return true; } 1179}; 1180 1181 1182 1183/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 1184/// object oriented design. They basically correspond to C++ classes. There 1185/// are two kinds of interface types, normal interfaces like "NSString" and 1186/// qualified interfaces, which are qualified with a protocol list like 1187/// "NSString<NSCopyable, NSAmazing>". Qualified interface types are instances 1188/// of ObjCQualifiedInterfaceType, which is a subclass of ObjCInterfaceType. 1189class ObjCInterfaceType : public Type { 1190 ObjCInterfaceDecl *Decl; 1191protected: 1192 ObjCInterfaceType(TypeClass tc, ObjCInterfaceDecl *D) : 1193 Type(tc, QualType()), Decl(D) { } 1194 friend class ASTContext; // ASTContext creates these. 1195public: 1196 1197 ObjCInterfaceDecl *getDecl() const { return Decl; } 1198 1199 /// qual_iterator and friends: this provides access to the (potentially empty) 1200 /// list of protocols qualifying this interface. If this is an instance of 1201 /// ObjCQualifiedInterfaceType it returns the list, otherwise it returns an 1202 /// empty list if there are no qualifying protocols. 1203 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 1204 inline qual_iterator qual_begin() const; 1205 inline qual_iterator qual_end() const; 1206 bool qual_empty() const { return getTypeClass() != ObjCQualifiedInterface; } 1207 1208 /// getNumProtocols - Return the number of qualifying protocols in this 1209 /// interface type, or 0 if there are none. 1210 inline unsigned getNumProtocols() const; 1211 1212 /// getProtocol - Return the specified qualifying protocol. 1213 inline ObjCProtocolDecl *getProtocol(unsigned i) const; 1214 1215 1216 virtual void getAsStringInternal(std::string &InnerString) const; 1217 static bool classof(const Type *T) { 1218 return T->getTypeClass() == ObjCInterface || 1219 T->getTypeClass() == ObjCQualifiedInterface; 1220 } 1221 static bool classof(const ObjCInterfaceType *) { return true; } 1222}; 1223 1224/// ObjCQualifiedInterfaceType - This class represents interface types 1225/// conforming to a list of protocols, such as INTF<Proto1, Proto2, Proto1>. 1226/// 1227/// Duplicate protocols are removed and protocol list is canonicalized to be in 1228/// alphabetical order. 1229class ObjCQualifiedInterfaceType : public ObjCInterfaceType, 1230 public llvm::FoldingSetNode { 1231 1232 // List of protocols for this protocol conforming object type 1233 // List is sorted on protocol name. No protocol is enterred more than once. 1234 llvm::SmallVector<ObjCProtocolDecl*, 4> Protocols; 1235 1236 ObjCQualifiedInterfaceType(ObjCInterfaceDecl *D, 1237 ObjCProtocolDecl **Protos, unsigned NumP) : 1238 ObjCInterfaceType(ObjCQualifiedInterface, D), 1239 Protocols(Protos, Protos+NumP) { } 1240 friend class ASTContext; // ASTContext creates these. 1241public: 1242 1243 ObjCProtocolDecl *getProtocol(unsigned i) const { 1244 return Protocols[i]; 1245 } 1246 unsigned getNumProtocols() const { 1247 return Protocols.size(); 1248 } 1249 1250 qual_iterator qual_begin() const { return Protocols.begin(); } 1251 qual_iterator qual_end() const { return Protocols.end(); } 1252 1253 virtual void getAsStringInternal(std::string &InnerString) const; 1254 1255 void Profile(llvm::FoldingSetNodeID &ID); 1256 static void Profile(llvm::FoldingSetNodeID &ID, 1257 const ObjCInterfaceDecl *Decl, 1258 ObjCProtocolDecl **protocols, unsigned NumProtocols); 1259 1260 static bool classof(const Type *T) { 1261 return T->getTypeClass() == ObjCQualifiedInterface; 1262 } 1263 static bool classof(const ObjCQualifiedInterfaceType *) { return true; } 1264}; 1265 1266inline ObjCInterfaceType::qual_iterator ObjCInterfaceType::qual_begin() const { 1267 if (const ObjCQualifiedInterfaceType *QIT = 1268 dyn_cast<ObjCQualifiedInterfaceType>(this)) 1269 return QIT->qual_begin(); 1270 return 0; 1271} 1272inline ObjCInterfaceType::qual_iterator ObjCInterfaceType::qual_end() const { 1273 if (const ObjCQualifiedInterfaceType *QIT = 1274 dyn_cast<ObjCQualifiedInterfaceType>(this)) 1275 return QIT->qual_end(); 1276 return 0; 1277} 1278 1279/// getNumProtocols - Return the number of qualifying protocols in this 1280/// interface type, or 0 if there are none. 1281inline unsigned ObjCInterfaceType::getNumProtocols() const { 1282 if (const ObjCQualifiedInterfaceType *QIT = 1283 dyn_cast<ObjCQualifiedInterfaceType>(this)) 1284 return QIT->getNumProtocols(); 1285 return 0; 1286} 1287 1288/// getProtocol - Return the specified qualifying protocol. 1289inline ObjCProtocolDecl *ObjCInterfaceType::getProtocol(unsigned i) const { 1290 return cast<ObjCQualifiedInterfaceType>(this)->getProtocol(i); 1291} 1292 1293 1294 1295/// ObjCQualifiedIdType - to represent id<protocol-list>. 1296/// 1297/// Duplicate protocols are removed and protocol list is canonicalized to be in 1298/// alphabetical order. 1299class ObjCQualifiedIdType : public Type, 1300 public llvm::FoldingSetNode { 1301 // List of protocols for this protocol conforming 'id' type 1302 // List is sorted on protocol name. No protocol is enterred more than once. 1303 llvm::SmallVector<ObjCProtocolDecl*, 8> Protocols; 1304 1305 ObjCQualifiedIdType(ObjCProtocolDecl **Protos, unsigned NumP) 1306 : Type(ObjCQualifiedId, QualType()/*these are always canonical*/), 1307 Protocols(Protos, Protos+NumP) { } 1308 friend class ASTContext; // ASTContext creates these. 1309public: 1310 1311 ObjCProtocolDecl *getProtocols(unsigned i) const { 1312 return Protocols[i]; 1313 } 1314 unsigned getNumProtocols() const { 1315 return Protocols.size(); 1316 } 1317 ObjCProtocolDecl **getReferencedProtocols() { 1318 return &Protocols[0]; 1319 } 1320 1321 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 1322 qual_iterator qual_begin() const { return Protocols.begin(); } 1323 qual_iterator qual_end() const { return Protocols.end(); } 1324 1325 virtual void getAsStringInternal(std::string &InnerString) const; 1326 1327 void Profile(llvm::FoldingSetNodeID &ID); 1328 static void Profile(llvm::FoldingSetNodeID &ID, 1329 ObjCProtocolDecl **protocols, unsigned NumProtocols); 1330 1331 static bool classof(const Type *T) { 1332 return T->getTypeClass() == ObjCQualifiedId; 1333 } 1334 static bool classof(const ObjCQualifiedIdType *) { return true; } 1335 1336}; 1337 1338 1339// Inline function definitions. 1340 1341/// getUnqualifiedType - Return the type without any qualifiers. 1342inline QualType QualType::getUnqualifiedType() const { 1343 Type *TP = getTypePtr(); 1344 if (const ASQualType *ASQT = dyn_cast<ASQualType>(TP)) 1345 TP = ASQT->getBaseType(); 1346 return QualType(TP, 0); 1347} 1348 1349/// getAddressSpace - Return the address space of this type. 1350inline unsigned QualType::getAddressSpace() const { 1351 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 1352 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 1353 return AT->getElementType().getAddressSpace(); 1354 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 1355 return RT->getAddressSpace(); 1356 if (const ASQualType *ASQT = dyn_cast<ASQualType>(CT)) 1357 return ASQT->getAddressSpace(); 1358 return 0; 1359} 1360 1361/// isMoreQualifiedThan - Determine whether this type is more 1362/// qualified than the Other type. For example, "const volatile int" 1363/// is more qualified than "const int", "volatile int", and 1364/// "int". However, it is not more qualified than "const volatile 1365/// int". 1366inline bool QualType::isMoreQualifiedThan(QualType Other) const { 1367 // FIXME: Handle address spaces 1368 unsigned MyQuals = this->getCVRQualifiers(); 1369 unsigned OtherQuals = Other.getCVRQualifiers(); 1370 assert(this->getAddressSpace() == 0 && "Address space not checked"); 1371 assert(Other.getAddressSpace() == 0 && "Address space not checked"); 1372 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 1373} 1374 1375/// isAtLeastAsQualifiedAs - Determine whether this type is at last 1376/// as qualified as the Other type. For example, "const volatile 1377/// int" is at least as qualified as "const int", "volatile int", 1378/// "int", and "const volatile int". 1379inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 1380 // FIXME: Handle address spaces 1381 unsigned MyQuals = this->getCVRQualifiers(); 1382 unsigned OtherQuals = Other.getCVRQualifiers(); 1383 assert(this->getAddressSpace() == 0 && "Address space not checked"); 1384 assert(Other.getAddressSpace() == 0 && "Address space not checked"); 1385 return (MyQuals | OtherQuals) == MyQuals; 1386} 1387 1388/// getNonReferenceType - If Type is a reference type (e.g., const 1389/// int&), returns the type that the reference refers to ("const 1390/// int"). Otherwise, returns the type itself. This routine is used 1391/// throughout Sema to implement C++ 5p6: 1392/// 1393/// If an expression initially has the type "reference to T" (8.3.2, 1394/// 8.5.3), the type is adjusted to "T" prior to any further 1395/// analysis, the expression designates the object or function 1396/// denoted by the reference, and the expression is an lvalue. 1397inline QualType QualType::getNonReferenceType() const { 1398 if (const ReferenceType *RefType = (*this)->getAsReferenceType()) 1399 return RefType->getPointeeType(); 1400 else 1401 return *this; 1402} 1403 1404inline const TypedefType* Type::getAsTypedefType() const { 1405 return dyn_cast<TypedefType>(this); 1406} 1407inline const ObjCInterfaceType *Type::getAsPointerToObjCInterfaceType() const { 1408 if (const PointerType *PT = getAsPointerType()) 1409 return PT->getPointeeType()->getAsObjCInterfaceType(); 1410 return 0; 1411} 1412 1413// NOTE: All of these methods use "getUnqualifiedType" to strip off address 1414// space qualifiers if present. 1415inline bool Type::isFunctionType() const { 1416 return isa<FunctionType>(CanonicalType.getUnqualifiedType()); 1417} 1418inline bool Type::isPointerType() const { 1419 return isa<PointerType>(CanonicalType.getUnqualifiedType()); 1420} 1421inline bool Type::isBlockPointerType() const { 1422 return isa<BlockPointerType>(CanonicalType); 1423} 1424inline bool Type::isReferenceType() const { 1425 return isa<ReferenceType>(CanonicalType.getUnqualifiedType()); 1426} 1427inline bool Type::isPointerLikeType() const { 1428 return isa<PointerLikeType>(CanonicalType.getUnqualifiedType()); 1429} 1430inline bool Type::isFunctionPointerType() const { 1431 if (const PointerType* T = getAsPointerType()) 1432 return T->getPointeeType()->isFunctionType(); 1433 else 1434 return false; 1435} 1436inline bool Type::isArrayType() const { 1437 return isa<ArrayType>(CanonicalType.getUnqualifiedType()); 1438} 1439inline bool Type::isConstantArrayType() const { 1440 return isa<ConstantArrayType>(CanonicalType.getUnqualifiedType()); 1441} 1442inline bool Type::isIncompleteArrayType() const { 1443 return isa<IncompleteArrayType>(CanonicalType.getUnqualifiedType()); 1444} 1445inline bool Type::isVariableArrayType() const { 1446 return isa<VariableArrayType>(CanonicalType.getUnqualifiedType()); 1447} 1448inline bool Type::isRecordType() const { 1449 return isa<RecordType>(CanonicalType.getUnqualifiedType()); 1450} 1451inline bool Type::isAnyComplexType() const { 1452 return isa<ComplexType>(CanonicalType.getUnqualifiedType()); 1453} 1454inline bool Type::isVectorType() const { 1455 return isa<VectorType>(CanonicalType.getUnqualifiedType()); 1456} 1457inline bool Type::isExtVectorType() const { 1458 return isa<ExtVectorType>(CanonicalType.getUnqualifiedType()); 1459} 1460inline bool Type::isObjCInterfaceType() const { 1461 return isa<ObjCInterfaceType>(CanonicalType.getUnqualifiedType()); 1462} 1463inline bool Type::isObjCQualifiedInterfaceType() const { 1464 return isa<ObjCQualifiedInterfaceType>(CanonicalType.getUnqualifiedType()); 1465} 1466inline bool Type::isObjCQualifiedIdType() const { 1467 return isa<ObjCQualifiedIdType>(CanonicalType.getUnqualifiedType()); 1468} 1469} // end namespace clang 1470 1471#endif 1472