Type.h revision 48a3432a72fd17868c0bf4d864ddb60420c63d68
1//===--- Type.h - C Language Family Type Representation ---------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Type interface and subclasses. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_CLANG_AST_TYPE_H 15#define LLVM_CLANG_AST_TYPE_H 16 17#include "clang/Basic/Diagnostic.h" 18#include "llvm/Support/Casting.h" 19#include "llvm/ADT/APSInt.h" 20#include "llvm/ADT/FoldingSet.h" 21#include "llvm/ADT/PointerIntPair.h" 22#include "llvm/Bitcode/SerializationFwd.h" 23using llvm::isa; 24using llvm::cast; 25using llvm::cast_or_null; 26using llvm::dyn_cast; 27using llvm::dyn_cast_or_null; 28 29namespace clang { 30 class ASTContext; 31 class Type; 32 class TypedefDecl; 33 class TagDecl; 34 class RecordDecl; 35 class CXXRecordDecl; 36 class EnumDecl; 37 class FieldDecl; 38 class ObjCInterfaceDecl; 39 class ObjCProtocolDecl; 40 class ObjCMethodDecl; 41 class Expr; 42 class Stmt; 43 class SourceLocation; 44 class PointerLikeType; 45 class PointerType; 46 class BlockPointerType; 47 class ReferenceType; 48 class VectorType; 49 class ArrayType; 50 class ConstantArrayType; 51 class VariableArrayType; 52 class IncompleteArrayType; 53 class RecordType; 54 class EnumType; 55 class ComplexType; 56 class TagType; 57 class TypedefType; 58 class FunctionType; 59 class FunctionTypeProto; 60 class ExtVectorType; 61 class BuiltinType; 62 class ObjCInterfaceType; 63 class ObjCQualifiedIdType; 64 class ObjCQualifiedInterfaceType; 65 class StmtIteratorBase; 66 67/// QualType - For efficiency, we don't store CVR-qualified types as nodes on 68/// their own: instead each reference to a type stores the qualifiers. This 69/// greatly reduces the number of nodes we need to allocate for types (for 70/// example we only need one for 'int', 'const int', 'volatile int', 71/// 'const volatile int', etc). 72/// 73/// As an added efficiency bonus, instead of making this a pair, we just store 74/// the three bits we care about in the low bits of the pointer. To handle the 75/// packing/unpacking, we make QualType be a simple wrapper class that acts like 76/// a smart pointer. 77class QualType { 78 llvm::PointerIntPair<Type*, 3> Value; 79public: 80 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 81 Const = 0x1, 82 Restrict = 0x2, 83 Volatile = 0x4, 84 CVRFlags = Const|Restrict|Volatile 85 }; 86 87 QualType() {} 88 89 QualType(const Type *Ptr, unsigned Quals) 90 : Value(const_cast<Type*>(Ptr), Quals) {} 91 92 unsigned getCVRQualifiers() const { return Value.getInt(); } 93 Type *getTypePtr() const { return Value.getPointer(); } 94 95 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 96 static QualType getFromOpaquePtr(void *Ptr) { 97 QualType T; 98 T.Value.setFromOpaqueValue(Ptr); 99 return T; 100 } 101 102 Type &operator*() const { 103 return *getTypePtr(); 104 } 105 106 Type *operator->() const { 107 return getTypePtr(); 108 } 109 110 /// isNull - Return true if this QualType doesn't point to a type yet. 111 bool isNull() const { 112 return getTypePtr() == 0; 113 } 114 115 bool isConstQualified() const { 116 return (getCVRQualifiers() & Const) ? true : false; 117 } 118 bool isVolatileQualified() const { 119 return (getCVRQualifiers() & Volatile) ? true : false; 120 } 121 bool isRestrictQualified() const { 122 return (getCVRQualifiers() & Restrict) ? true : false; 123 } 124 125 bool isConstant(ASTContext& Ctx) const; 126 127 /// addConst/addVolatile/addRestrict - add the specified type qual to this 128 /// QualType. 129 void addConst() { Value.setInt(Value.getInt() | Const); } 130 void addVolatile() { Value.setInt(Value.getInt() | Volatile); } 131 void addRestrict() { Value.setInt(Value.getInt() | Restrict); } 132 133 void removeConst() { Value.setInt(Value.getInt() & ~Const); } 134 void removeVolatile() { Value.setInt(Value.getInt() & ~Volatile); } 135 void removeRestrict() { Value.setInt(Value.getInt() & ~Restrict); } 136 137 QualType getQualifiedType(unsigned TQs) const { 138 return QualType(getTypePtr(), TQs); 139 } 140 QualType getWithAdditionalQualifiers(unsigned TQs) const { 141 return QualType(getTypePtr(), TQs|getCVRQualifiers()); 142 } 143 144 QualType withConst() const { return getWithAdditionalQualifiers(Const); } 145 QualType withVolatile() const { return getWithAdditionalQualifiers(Volatile);} 146 QualType withRestrict() const { return getWithAdditionalQualifiers(Restrict);} 147 148 QualType getUnqualifiedType() const; 149 bool isMoreQualifiedThan(QualType Other) const; 150 bool isAtLeastAsQualifiedAs(QualType Other) const; 151 QualType getNonReferenceType() const; 152 153 154 /// operator==/!= - Indicate whether the specified types and qualifiers are 155 /// identical. 156 bool operator==(const QualType &RHS) const { 157 return Value == RHS.Value; 158 } 159 bool operator!=(const QualType &RHS) const { 160 return Value != RHS.Value; 161 } 162 std::string getAsString() const { 163 std::string S; 164 getAsStringInternal(S); 165 return S; 166 } 167 void getAsStringInternal(std::string &Str) const; 168 169 void dump(const char *s) const; 170 void dump() const; 171 172 void Profile(llvm::FoldingSetNodeID &ID) const { 173 ID.AddPointer(getAsOpaquePtr()); 174 } 175 176public: 177 178 /// getAddressSpace - Return the address space of this type. 179 inline unsigned getAddressSpace() const; 180 181 /// Emit - Serialize a QualType to Bitcode. 182 void Emit(llvm::Serializer& S) const; 183 184 /// Read - Deserialize a QualType from Bitcode. 185 static QualType ReadVal(llvm::Deserializer& D); 186 187 void ReadBackpatch(llvm::Deserializer& D); 188}; 189 190} // end clang. 191 192namespace llvm { 193/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 194/// to a specific Type class. 195template<> struct simplify_type<const ::clang::QualType> { 196 typedef ::clang::Type* SimpleType; 197 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 198 return Val.getTypePtr(); 199 } 200}; 201template<> struct simplify_type< ::clang::QualType> 202 : public simplify_type<const ::clang::QualType> {}; 203 204} // end namespace llvm 205 206namespace clang { 207 208/// Type - This is the base class of the type hierarchy. A central concept 209/// with types is that each type always has a canonical type. A canonical type 210/// is the type with any typedef names stripped out of it or the types it 211/// references. For example, consider: 212/// 213/// typedef int foo; 214/// typedef foo* bar; 215/// 'int *' 'foo *' 'bar' 216/// 217/// There will be a Type object created for 'int'. Since int is canonical, its 218/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 219/// TypeNameType). Its CanonicalType pointer points to the 'int' Type. Next 220/// there is a PointerType that represents 'int*', which, like 'int', is 221/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 222/// type is 'int*', and there is a TypeNameType for 'bar', whose canonical type 223/// is also 'int*'. 224/// 225/// Non-canonical types are useful for emitting diagnostics, without losing 226/// information about typedefs being used. Canonical types are useful for type 227/// comparisons (they allow by-pointer equality tests) and useful for reasoning 228/// about whether something has a particular form (e.g. is a function type), 229/// because they implicitly, recursively, strip all typedefs out of a type. 230/// 231/// Types, once created, are immutable. 232/// 233class Type { 234public: 235 enum TypeClass { 236 Builtin, Complex, Pointer, Reference, 237 ConstantArray, VariableArray, IncompleteArray, 238 Vector, ExtVector, 239 FunctionNoProto, FunctionProto, 240 TypeName, Tagged, ASQual, 241 ObjCInterface, ObjCQualifiedInterface, 242 ObjCQualifiedId, 243 TypeOfExp, TypeOfTyp, // GNU typeof extension. 244 BlockPointer // C extension 245 }; 246private: 247 QualType CanonicalType; 248 249 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 250 /// Note that this should stay at the end of the ivars for Type so that 251 /// subclasses can pack their bitfields into the same word. 252 unsigned TC : 5; 253protected: 254 // silence VC++ warning C4355: 'this' : used in base member initializer list 255 Type *this_() { return this; } 256 Type(TypeClass tc, QualType Canonical) 257 : CanonicalType(Canonical.isNull() ? QualType(this_(), 0) : Canonical), 258 TC(tc) {} 259 virtual ~Type() {}; 260 virtual void Destroy(ASTContext& C); 261 friend class ASTContext; 262 263 void EmitTypeInternal(llvm::Serializer& S) const; 264 void ReadTypeInternal(llvm::Deserializer& D); 265 266public: 267 TypeClass getTypeClass() const { return static_cast<TypeClass>(TC); } 268 269 bool isCanonical() const { return CanonicalType.getTypePtr() == this; } 270 271 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 272 /// object types, function types, and incomplete types. 273 274 /// isObjectType - types that fully describe objects. An object is a region 275 /// of memory that can be examined and stored into (H&S). 276 bool isObjectType() const; 277 278 /// isIncompleteType - Return true if this is an incomplete type. 279 /// A type that can describe objects, but which lacks information needed to 280 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 281 /// routine will need to determine if the size is actually required. 282 bool isIncompleteType() const; 283 284 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 285 /// type, in other words, not a function type. 286 bool isIncompleteOrObjectType() const { 287 return !isFunctionType(); 288 } 289 290 /// isVariablyModifiedType (C99 6.7.5.2p2) - Return true for variable array 291 /// types that have a non-constant expression. This does not include "[]". 292 bool isVariablyModifiedType() const; 293 294 /// Helper methods to distinguish type categories. All type predicates 295 /// operate on the canonical type, ignoring typedefs and qualifiers. 296 297 /// isIntegerType() does *not* include complex integers (a GCC extension). 298 /// isComplexIntegerType() can be used to test for complex integers. 299 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 300 bool isEnumeralType() const; 301 bool isBooleanType() const; 302 bool isCharType() const; 303 bool isWideCharType() const; 304 bool isIntegralType() const; 305 306 /// Floating point categories. 307 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 308 /// isComplexType() does *not* include complex integers (a GCC extension). 309 /// isComplexIntegerType() can be used to test for complex integers. 310 bool isComplexType() const; // C99 6.2.5p11 (complex) 311 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 312 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 313 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 314 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 315 bool isVoidType() const; // C99 6.2.5p19 316 bool isDerivedType() const; // C99 6.2.5p20 317 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 318 bool isAggregateType() const; // C99 6.2.5p21 (arrays, structures) 319 320 // Type Predicates: Check to see if this type is structurally the specified 321 // type, ignoring typedefs and qualifiers. 322 bool isFunctionType() const; 323 bool isPointerLikeType() const; // Pointer or Reference. 324 bool isPointerType() const; 325 bool isBlockPointerType() const; 326 bool isReferenceType() const; 327 bool isFunctionPointerType() const; 328 bool isArrayType() const; 329 bool isConstantArrayType() const; 330 bool isIncompleteArrayType() const; 331 bool isVariableArrayType() const; 332 bool isRecordType() const; 333 bool isClassType() const; 334 bool isStructureType() const; 335 bool isUnionType() const; 336 bool isComplexIntegerType() const; // GCC _Complex integer type. 337 bool isVectorType() const; // GCC vector type. 338 bool isExtVectorType() const; // Extended vector type. 339 bool isObjCInterfaceType() const; // NSString or NSString<foo> 340 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 341 bool isObjCQualifiedIdType() const; // id<foo> 342 bool isOverloadType() const; // C++ overloaded function 343 344 // Type Checking Functions: Check to see if this type is structurally the 345 // specified type, ignoring typedefs and qualifiers, and return a pointer to 346 // the best type we can. 347 const BuiltinType *getAsBuiltinType() const; 348 const FunctionType *getAsFunctionType() const; 349 const FunctionTypeProto *getAsFunctionTypeProto() const; 350 const PointerLikeType *getAsPointerLikeType() const; // Pointer or Reference. 351 const PointerType *getAsPointerType() const; 352 const BlockPointerType *getAsBlockPointerType() const; 353 const ReferenceType *getAsReferenceType() const; 354 const RecordType *getAsRecordType() const; 355 const RecordType *getAsStructureType() const; 356 /// NOTE: getAsArrayType* are methods on ASTContext. 357 const TypedefType *getAsTypedefType() const; 358 const RecordType *getAsUnionType() const; 359 const EnumType *getAsEnumType() const; 360 const VectorType *getAsVectorType() const; // GCC vector type. 361 const ComplexType *getAsComplexType() const; 362 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 363 const ExtVectorType *getAsExtVectorType() const; // Extended vector type. 364 const ObjCInterfaceType *getAsObjCInterfaceType() const; 365 const ObjCQualifiedInterfaceType *getAsObjCQualifiedInterfaceType() const; 366 const ObjCQualifiedIdType *getAsObjCQualifiedIdType() const; 367 368 /// getAsPointerToObjCInterfaceType - If this is a pointer to an ObjC 369 /// interface, return the interface type, otherwise return null. 370 const ObjCInterfaceType *getAsPointerToObjCInterfaceType() const; 371 372 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 373 /// element type of the array, potentially with type qualifiers missing. 374 /// This method should never be used when type qualifiers are meaningful. 375 const Type *getArrayElementTypeNoTypeQual() const; 376 377 378 379 /// getDesugaredType - Return the specified type with any "sugar" removed from 380 /// the type. This takes off typedefs, typeof's etc. If the outer level of 381 /// the type is already concrete, it returns it unmodified. This is similar 382 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 383 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 384 /// concrete. 385 QualType getDesugaredType() const; 386 387 /// More type predicates useful for type checking/promotion 388 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 389 390 /// isSignedIntegerType - Return true if this is an integer type that is 391 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 392 /// an enum decl which has a signed representation, or a vector of signed 393 /// integer element type. 394 bool isSignedIntegerType() const; 395 396 /// isUnsignedIntegerType - Return true if this is an integer type that is 397 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 398 /// decl which has an unsigned representation, or a vector of unsigned integer 399 /// element type. 400 bool isUnsignedIntegerType() const; 401 402 /// isConstantSizeType - Return true if this is not a variable sized type, 403 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 404 /// incomplete types. 405 bool isConstantSizeType() const; 406 407 QualType getCanonicalTypeInternal() const { return CanonicalType; } 408 void dump() const; 409 virtual void getAsStringInternal(std::string &InnerString) const = 0; 410 static bool classof(const Type *) { return true; } 411 412protected: 413 /// Emit - Emit a Type to bitcode. Used by ASTContext. 414 void Emit(llvm::Serializer& S) const; 415 416 /// Create - Construct a Type from bitcode. Used by ASTContext. 417 static void Create(ASTContext& Context, unsigned i, llvm::Deserializer& S); 418 419 /// EmitImpl - Subclasses must implement this method in order to 420 /// be serialized. 421 // FIXME: Make this abstract once implemented. 422 virtual void EmitImpl(llvm::Serializer& S) const { 423 assert (false && "Serializization for type not supported."); 424 } 425}; 426 427/// ASQualType - TR18037 (C embedded extensions) 6.2.5p26 428/// This supports address space qualified types. 429/// 430class ASQualType : public Type, public llvm::FoldingSetNode { 431 /// BaseType - This is the underlying type that this qualifies. All CVR 432 /// qualifiers are stored on the QualType that references this type, so we 433 /// can't have any here. 434 Type *BaseType; 435 /// Address Space ID - The address space ID this type is qualified with. 436 unsigned AddressSpace; 437 ASQualType(Type *Base, QualType CanonicalPtr, unsigned AddrSpace) : 438 Type(ASQual, CanonicalPtr), BaseType(Base), AddressSpace(AddrSpace) { 439 } 440 friend class ASTContext; // ASTContext creates these. 441public: 442 Type *getBaseType() const { return BaseType; } 443 unsigned getAddressSpace() const { return AddressSpace; } 444 445 virtual void getAsStringInternal(std::string &InnerString) const; 446 447 void Profile(llvm::FoldingSetNodeID &ID) { 448 Profile(ID, getBaseType(), AddressSpace); 449 } 450 static void Profile(llvm::FoldingSetNodeID &ID, Type *Base, 451 unsigned AddrSpace) { 452 ID.AddPointer(Base); 453 ID.AddInteger(AddrSpace); 454 } 455 456 static bool classof(const Type *T) { return T->getTypeClass() == ASQual; } 457 static bool classof(const ASQualType *) { return true; } 458 459protected: 460 virtual void EmitImpl(llvm::Serializer& S) const; 461 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 462 friend class Type; 463}; 464 465 466/// BuiltinType - This class is used for builtin types like 'int'. Builtin 467/// types are always canonical and have a literal name field. 468class BuiltinType : public Type { 469public: 470 enum Kind { 471 Void, 472 473 Bool, // This is bool and/or _Bool. 474 Char_U, // This is 'char' for targets where char is unsigned. 475 UChar, // This is explicitly qualified unsigned char. 476 UShort, 477 UInt, 478 ULong, 479 ULongLong, 480 481 Char_S, // This is 'char' for targets where char is signed. 482 SChar, // This is explicitly qualified signed char. 483 WChar, // This is 'wchar_t' for C++. 484 Short, 485 Int, 486 Long, 487 LongLong, 488 489 Float, Double, LongDouble, 490 491 Overload // This represents the type of an overloaded function declaration. 492 }; 493private: 494 Kind TypeKind; 495public: 496 BuiltinType(Kind K) : Type(Builtin, QualType()), TypeKind(K) {} 497 498 Kind getKind() const { return TypeKind; } 499 const char *getName() const; 500 501 virtual void getAsStringInternal(std::string &InnerString) const; 502 503 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 504 static bool classof(const BuiltinType *) { return true; } 505}; 506 507/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 508/// types (_Complex float etc) as well as the GCC integer complex extensions. 509/// 510class ComplexType : public Type, public llvm::FoldingSetNode { 511 QualType ElementType; 512 ComplexType(QualType Element, QualType CanonicalPtr) : 513 Type(Complex, CanonicalPtr), ElementType(Element) { 514 } 515 friend class ASTContext; // ASTContext creates these. 516public: 517 QualType getElementType() const { return ElementType; } 518 519 virtual void getAsStringInternal(std::string &InnerString) const; 520 521 void Profile(llvm::FoldingSetNodeID &ID) { 522 Profile(ID, getElementType()); 523 } 524 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 525 ID.AddPointer(Element.getAsOpaquePtr()); 526 } 527 528 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 529 static bool classof(const ComplexType *) { return true; } 530 531protected: 532 virtual void EmitImpl(llvm::Serializer& S) const; 533 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 534 friend class Type; 535}; 536 537/// PointerLikeType - Common base class for pointers and references. 538/// FIXME: Add more documentation on this classes design point. For example, 539/// should BlockPointerType inherit from it? Is the concept of a PointerLikeType 540/// in the C++ standard? 541/// 542class PointerLikeType : public Type { 543 QualType PointeeType; 544protected: 545 PointerLikeType(TypeClass K, QualType Pointee, QualType CanonicalPtr) : 546 Type(K, CanonicalPtr), PointeeType(Pointee) { 547 } 548public: 549 550 QualType getPointeeType() const { return PointeeType; } 551 552 static bool classof(const Type *T) { 553 return T->getTypeClass() == Pointer || T->getTypeClass() == Reference; 554 } 555 static bool classof(const PointerLikeType *) { return true; } 556}; 557 558/// PointerType - C99 6.7.5.1 - Pointer Declarators. 559/// 560class PointerType : public PointerLikeType, public llvm::FoldingSetNode { 561 PointerType(QualType Pointee, QualType CanonicalPtr) : 562 PointerLikeType(Pointer, Pointee, CanonicalPtr) { 563 } 564 friend class ASTContext; // ASTContext creates these. 565public: 566 567 virtual void getAsStringInternal(std::string &InnerString) const; 568 569 void Profile(llvm::FoldingSetNodeID &ID) { 570 Profile(ID, getPointeeType()); 571 } 572 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 573 ID.AddPointer(Pointee.getAsOpaquePtr()); 574 } 575 576 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 577 static bool classof(const PointerType *) { return true; } 578 579protected: 580 virtual void EmitImpl(llvm::Serializer& S) const; 581 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 582 friend class Type; 583}; 584 585/// BlockPointerType - pointer to a block type. 586/// This type is to represent types syntactically represented as 587/// "void (^)(int)", etc. Pointee is required to always be a function type. 588/// FIXME: Should BlockPointerType inherit from PointerLikeType? It could 589/// simplfy some type checking code, however PointerLikeType doesn't appear 590/// to be used by the type checker. 591/// 592class BlockPointerType : public Type, public llvm::FoldingSetNode { 593 QualType PointeeType; // Block is some kind of pointer type 594 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 595 Type(BlockPointer, CanonicalCls), PointeeType(Pointee) { 596 } 597 friend class ASTContext; // ASTContext creates these. 598public: 599 600 // Get the pointee type. Pointee is required to always be a function type. 601 QualType getPointeeType() const { return PointeeType; } 602 603 virtual void getAsStringInternal(std::string &InnerString) const; 604 605 void Profile(llvm::FoldingSetNodeID &ID) { 606 Profile(ID, getPointeeType()); 607 } 608 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 609 ID.AddPointer(Pointee.getAsOpaquePtr()); 610 } 611 612 static bool classof(const Type *T) { 613 return T->getTypeClass() == BlockPointer; 614 } 615 static bool classof(const BlockPointerType *) { return true; } 616 617 protected: 618 virtual void EmitImpl(llvm::Serializer& S) const; 619 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 620 friend class Type; 621}; 622 623/// ReferenceType - C++ 8.3.2 - Reference Declarators. 624/// 625class ReferenceType : public PointerLikeType, public llvm::FoldingSetNode { 626 ReferenceType(QualType Referencee, QualType CanonicalRef) : 627 PointerLikeType(Reference, Referencee, CanonicalRef) { 628 } 629 friend class ASTContext; // ASTContext creates these. 630public: 631 virtual void getAsStringInternal(std::string &InnerString) const; 632 633 void Profile(llvm::FoldingSetNodeID &ID) { 634 Profile(ID, getPointeeType()); 635 } 636 static void Profile(llvm::FoldingSetNodeID &ID, QualType Referencee) { 637 ID.AddPointer(Referencee.getAsOpaquePtr()); 638 } 639 640 static bool classof(const Type *T) { return T->getTypeClass() == Reference; } 641 static bool classof(const ReferenceType *) { return true; } 642}; 643 644/// ArrayType - C99 6.7.5.2 - Array Declarators. 645/// 646class ArrayType : public Type, public llvm::FoldingSetNode { 647public: 648 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 649 /// an array with a static size (e.g. int X[static 4]), or with a star size 650 /// (e.g. int X[*]). 'static' is only allowed on function parameters. 651 enum ArraySizeModifier { 652 Normal, Static, Star 653 }; 654private: 655 /// ElementType - The element type of the array. 656 QualType ElementType; 657 658 // NOTE: VC++ treats enums as signed, avoid using the ArraySizeModifier enum 659 /// NOTE: These fields are packed into the bitfields space in the Type class. 660 unsigned SizeModifier : 2; 661 662 /// IndexTypeQuals - Capture qualifiers in declarations like: 663 /// 'int X[static restrict 4]'. For function parameters only. 664 unsigned IndexTypeQuals : 3; 665 666protected: 667 ArrayType(TypeClass tc, QualType et, QualType can, 668 ArraySizeModifier sm, unsigned tq) 669 : Type(tc, can), ElementType(et), SizeModifier(sm), IndexTypeQuals(tq) {} 670 friend class ASTContext; // ASTContext creates these. 671public: 672 QualType getElementType() const { return ElementType; } 673 ArraySizeModifier getSizeModifier() const { 674 return ArraySizeModifier(SizeModifier); 675 } 676 unsigned getIndexTypeQualifier() const { return IndexTypeQuals; } 677 678 static bool classof(const Type *T) { 679 return T->getTypeClass() == ConstantArray || 680 T->getTypeClass() == VariableArray || 681 T->getTypeClass() == IncompleteArray; 682 } 683 static bool classof(const ArrayType *) { return true; } 684}; 685 686/// ConstantArrayType - This class represents C arrays with a specified constant 687/// size. For example 'int A[100]' has ConstantArrayType where the element type 688/// is 'int' and the size is 100. 689class ConstantArrayType : public ArrayType { 690 llvm::APInt Size; // Allows us to unique the type. 691 692 ConstantArrayType(QualType et, QualType can, llvm::APInt sz, 693 ArraySizeModifier sm, unsigned tq) 694 : ArrayType(ConstantArray, et, can, sm, tq), Size(sz) {} 695 friend class ASTContext; // ASTContext creates these. 696public: 697 const llvm::APInt &getSize() const { return Size; } 698 virtual void getAsStringInternal(std::string &InnerString) const; 699 700 void Profile(llvm::FoldingSetNodeID &ID) { 701 Profile(ID, getElementType(), getSize()); 702 } 703 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 704 llvm::APInt ArraySize) { 705 ID.AddPointer(ET.getAsOpaquePtr()); 706 ID.AddInteger(ArraySize.getZExtValue()); 707 } 708 static bool classof(const Type *T) { 709 return T->getTypeClass() == ConstantArray; 710 } 711 static bool classof(const ConstantArrayType *) { return true; } 712 713protected: 714 virtual void EmitImpl(llvm::Serializer& S) const; 715 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 716 friend class Type; 717}; 718 719/// IncompleteArrayType - This class represents C arrays with an unspecified 720/// size. For example 'int A[]' has an IncompleteArrayType where the element 721/// type is 'int' and the size is unspecified. 722class IncompleteArrayType : public ArrayType { 723 IncompleteArrayType(QualType et, QualType can, 724 ArraySizeModifier sm, unsigned tq) 725 : ArrayType(IncompleteArray, et, can, sm, tq) {} 726 friend class ASTContext; // ASTContext creates these. 727public: 728 729 virtual void getAsStringInternal(std::string &InnerString) const; 730 731 static bool classof(const Type *T) { 732 return T->getTypeClass() == IncompleteArray; 733 } 734 static bool classof(const IncompleteArrayType *) { return true; } 735 736 friend class StmtIteratorBase; 737 738 void Profile(llvm::FoldingSetNodeID &ID) { 739 Profile(ID, getElementType()); 740 } 741 742 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET) { 743 ID.AddPointer(ET.getAsOpaquePtr()); 744 } 745 746protected: 747 virtual void EmitImpl(llvm::Serializer& S) const; 748 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 749 friend class Type; 750}; 751 752/// VariableArrayType - This class represents C arrays with a specified size 753/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 754/// Since the size expression is an arbitrary expression, we store it as such. 755/// 756/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 757/// should not be: two lexically equivalent variable array types could mean 758/// different things, for example, these variables do not have the same type 759/// dynamically: 760/// 761/// void foo(int x) { 762/// int Y[x]; 763/// ++x; 764/// int Z[x]; 765/// } 766/// 767class VariableArrayType : public ArrayType { 768 /// SizeExpr - An assignment expression. VLA's are only permitted within 769 /// a function block. 770 Stmt *SizeExpr; 771 772 VariableArrayType(QualType et, QualType can, Expr *e, 773 ArraySizeModifier sm, unsigned tq) 774 : ArrayType(VariableArray, et, can, sm, tq), SizeExpr((Stmt*) e) {} 775 friend class ASTContext; // ASTContext creates these. 776 virtual void Destroy(ASTContext& C); 777 778public: 779 Expr *getSizeExpr() const { 780 // We use C-style casts instead of cast<> here because we do not wish 781 // to have a dependency of Type.h on Stmt.h/Expr.h. 782 return (Expr*) SizeExpr; 783 } 784 785 virtual void getAsStringInternal(std::string &InnerString) const; 786 787 static bool classof(const Type *T) { 788 return T->getTypeClass() == VariableArray; 789 } 790 static bool classof(const VariableArrayType *) { return true; } 791 792 friend class StmtIteratorBase; 793 794 void Profile(llvm::FoldingSetNodeID &ID) { 795 assert (0 && "Cannnot unique VariableArrayTypes."); 796 } 797 798protected: 799 virtual void EmitImpl(llvm::Serializer& S) const; 800 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 801 friend class Type; 802}; 803 804/// VectorType - GCC generic vector type. This type is created using 805/// __attribute__((vector_size(n)), where "n" specifies the vector size in 806/// bytes. Since the constructor takes the number of vector elements, the 807/// client is responsible for converting the size into the number of elements. 808class VectorType : public Type, public llvm::FoldingSetNode { 809protected: 810 /// ElementType - The element type of the vector. 811 QualType ElementType; 812 813 /// NumElements - The number of elements in the vector. 814 unsigned NumElements; 815 816 VectorType(QualType vecType, unsigned nElements, QualType canonType) : 817 Type(Vector, canonType), ElementType(vecType), NumElements(nElements) {} 818 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 819 QualType canonType) : Type(tc, canonType), ElementType(vecType), 820 NumElements(nElements) {} 821 friend class ASTContext; // ASTContext creates these. 822public: 823 824 QualType getElementType() const { return ElementType; } 825 unsigned getNumElements() const { return NumElements; } 826 827 virtual void getAsStringInternal(std::string &InnerString) const; 828 829 void Profile(llvm::FoldingSetNodeID &ID) { 830 Profile(ID, getElementType(), getNumElements(), getTypeClass()); 831 } 832 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 833 unsigned NumElements, TypeClass TypeClass) { 834 ID.AddPointer(ElementType.getAsOpaquePtr()); 835 ID.AddInteger(NumElements); 836 ID.AddInteger(TypeClass); 837 } 838 static bool classof(const Type *T) { 839 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 840 } 841 static bool classof(const VectorType *) { return true; } 842}; 843 844/// ExtVectorType - Extended vector type. This type is created using 845/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 846/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 847/// class enables syntactic extensions, like Vector Components for accessing 848/// points, colors, and textures (modeled after OpenGL Shading Language). 849class ExtVectorType : public VectorType { 850 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 851 VectorType(ExtVector, vecType, nElements, canonType) {} 852 friend class ASTContext; // ASTContext creates these. 853public: 854 static int getPointAccessorIdx(char c) { 855 switch (c) { 856 default: return -1; 857 case 'x': return 0; 858 case 'y': return 1; 859 case 'z': return 2; 860 case 'w': return 3; 861 } 862 } 863 static int getColorAccessorIdx(char c) { 864 switch (c) { 865 default: return -1; 866 case 'r': return 0; 867 case 'g': return 1; 868 case 'b': return 2; 869 case 'a': return 3; 870 } 871 } 872 static int getTextureAccessorIdx(char c) { 873 switch (c) { 874 default: return -1; 875 case 's': return 0; 876 case 't': return 1; 877 case 'p': return 2; 878 case 'q': return 3; 879 } 880 }; 881 882 static int getAccessorIdx(char c) { 883 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 884 if (int idx = getColorAccessorIdx(c)+1) return idx-1; 885 return getTextureAccessorIdx(c); 886 } 887 888 bool isAccessorWithinNumElements(char c) const { 889 if (int idx = getAccessorIdx(c)+1) 890 return unsigned(idx-1) < NumElements; 891 return false; 892 } 893 virtual void getAsStringInternal(std::string &InnerString) const; 894 895 static bool classof(const Type *T) { 896 return T->getTypeClass() == ExtVector; 897 } 898 static bool classof(const ExtVectorType *) { return true; } 899}; 900 901/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 902/// class of FunctionTypeNoProto and FunctionTypeProto. 903/// 904class FunctionType : public Type { 905 /// SubClassData - This field is owned by the subclass, put here to pack 906 /// tightly with the ivars in Type. 907 bool SubClassData : 1; 908 909 /// TypeQuals - Used only by FunctionTypeProto, put here to pack with the 910 /// other bitfields. 911 /// The qualifiers are part of FunctionTypeProto because... 912 /// 913 /// C++ 8.3.5p4: The return type, the parameter type list and the 914 /// cv-qualifier-seq, [...], are part of the function type. 915 /// 916 unsigned TypeQuals : 3; 917 918 // The type returned by the function. 919 QualType ResultType; 920protected: 921 FunctionType(TypeClass tc, QualType res, bool SubclassInfo, 922 unsigned typeQuals, QualType Canonical) 923 : Type(tc, Canonical), 924 SubClassData(SubclassInfo), TypeQuals(typeQuals), ResultType(res) {} 925 bool getSubClassData() const { return SubClassData; } 926 unsigned getTypeQuals() const { return TypeQuals; } 927public: 928 929 QualType getResultType() const { return ResultType; } 930 931 932 static bool classof(const Type *T) { 933 return T->getTypeClass() == FunctionNoProto || 934 T->getTypeClass() == FunctionProto; 935 } 936 static bool classof(const FunctionType *) { return true; } 937}; 938 939/// FunctionTypeNoProto - Represents a K&R-style 'int foo()' function, which has 940/// no information available about its arguments. 941class FunctionTypeNoProto : public FunctionType, public llvm::FoldingSetNode { 942 FunctionTypeNoProto(QualType Result, QualType Canonical) 943 : FunctionType(FunctionNoProto, Result, false, 0, Canonical) {} 944 friend class ASTContext; // ASTContext creates these. 945public: 946 // No additional state past what FunctionType provides. 947 948 virtual void getAsStringInternal(std::string &InnerString) const; 949 950 void Profile(llvm::FoldingSetNodeID &ID) { 951 Profile(ID, getResultType()); 952 } 953 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType) { 954 ID.AddPointer(ResultType.getAsOpaquePtr()); 955 } 956 957 static bool classof(const Type *T) { 958 return T->getTypeClass() == FunctionNoProto; 959 } 960 static bool classof(const FunctionTypeNoProto *) { return true; } 961 962protected: 963 virtual void EmitImpl(llvm::Serializer& S) const; 964 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 965 friend class Type; 966}; 967 968/// FunctionTypeProto - Represents a prototype with argument type info, e.g. 969/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 970/// arguments, not as having a single void argument. 971class FunctionTypeProto : public FunctionType, public llvm::FoldingSetNode { 972 FunctionTypeProto(QualType Result, const QualType *ArgArray, unsigned numArgs, 973 bool isVariadic, unsigned typeQuals, QualType Canonical) 974 : FunctionType(FunctionProto, Result, isVariadic, typeQuals, Canonical), 975 NumArgs(numArgs) { 976 // Fill in the trailing argument array. 977 QualType *ArgInfo = reinterpret_cast<QualType *>(this+1);; 978 for (unsigned i = 0; i != numArgs; ++i) 979 ArgInfo[i] = ArgArray[i]; 980 } 981 982 /// NumArgs - The number of arguments this function has, not counting '...'. 983 unsigned NumArgs; 984 985 /// ArgInfo - There is an variable size array after the class in memory that 986 /// holds the argument types. 987 988 friend class ASTContext; // ASTContext creates these. 989 virtual void Destroy(ASTContext& C); 990 991public: 992 unsigned getNumArgs() const { return NumArgs; } 993 QualType getArgType(unsigned i) const { 994 assert(i < NumArgs && "Invalid argument number!"); 995 return arg_type_begin()[i]; 996 } 997 998 bool isVariadic() const { return getSubClassData(); } 999 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 1000 1001 typedef const QualType *arg_type_iterator; 1002 arg_type_iterator arg_type_begin() const { 1003 return reinterpret_cast<const QualType *>(this+1); 1004 } 1005 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 1006 1007 virtual void getAsStringInternal(std::string &InnerString) const; 1008 1009 static bool classof(const Type *T) { 1010 return T->getTypeClass() == FunctionProto; 1011 } 1012 static bool classof(const FunctionTypeProto *) { return true; } 1013 1014 void Profile(llvm::FoldingSetNodeID &ID); 1015 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 1016 arg_type_iterator ArgTys, unsigned NumArgs, 1017 bool isVariadic, unsigned TypeQuals); 1018 1019protected: 1020 virtual void EmitImpl(llvm::Serializer& S) const; 1021 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 1022 friend class Type; 1023}; 1024 1025 1026class TypedefType : public Type { 1027 TypedefDecl *Decl; 1028protected: 1029 TypedefType(TypeClass tc, TypedefDecl *D, QualType can) 1030 : Type(tc, can), Decl(D) { 1031 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1032 } 1033 friend class ASTContext; // ASTContext creates these. 1034public: 1035 1036 TypedefDecl *getDecl() const { return Decl; } 1037 1038 /// LookThroughTypedefs - Return the ultimate type this typedef corresponds to 1039 /// potentially looking through *all* consequtive typedefs. This returns the 1040 /// sum of the type qualifiers, so if you have: 1041 /// typedef const int A; 1042 /// typedef volatile A B; 1043 /// looking through the typedefs for B will give you "const volatile A". 1044 QualType LookThroughTypedefs() const; 1045 1046 virtual void getAsStringInternal(std::string &InnerString) const; 1047 1048 static bool classof(const Type *T) { return T->getTypeClass() == TypeName; } 1049 static bool classof(const TypedefType *) { return true; } 1050 1051protected: 1052 virtual void EmitImpl(llvm::Serializer& S) const; 1053 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 1054 friend class Type; 1055}; 1056 1057/// TypeOfExpr (GCC extension). 1058class TypeOfExpr : public Type { 1059 Expr *TOExpr; 1060 TypeOfExpr(Expr *E, QualType can) : Type(TypeOfExp, can), TOExpr(E) { 1061 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1062 } 1063 friend class ASTContext; // ASTContext creates these. 1064public: 1065 Expr *getUnderlyingExpr() const { return TOExpr; } 1066 1067 virtual void getAsStringInternal(std::string &InnerString) const; 1068 1069 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExp; } 1070 static bool classof(const TypeOfExpr *) { return true; } 1071}; 1072 1073/// TypeOfType (GCC extension). 1074class TypeOfType : public Type { 1075 QualType TOType; 1076 TypeOfType(QualType T, QualType can) : Type(TypeOfTyp, can), TOType(T) { 1077 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1078 } 1079 friend class ASTContext; // ASTContext creates these. 1080public: 1081 QualType getUnderlyingType() const { return TOType; } 1082 1083 virtual void getAsStringInternal(std::string &InnerString) const; 1084 1085 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfTyp; } 1086 static bool classof(const TypeOfType *) { return true; } 1087}; 1088 1089class TagType : public Type { 1090 TagDecl *decl; 1091 friend class ASTContext; 1092 1093protected: 1094 TagType(TagDecl *D, QualType can) : Type(Tagged, can), decl(D) {} 1095 1096public: 1097 TagDecl *getDecl() const { return decl; } 1098 1099 virtual void getAsStringInternal(std::string &InnerString) const; 1100 1101 static bool classof(const Type *T) { return T->getTypeClass() == Tagged; } 1102 static bool classof(const TagType *) { return true; } 1103 1104protected: 1105 virtual void EmitImpl(llvm::Serializer& S) const; 1106 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 1107 friend class Type; 1108}; 1109 1110/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 1111/// to detect TagType objects of structs/unions/classes. 1112class RecordType : public TagType { 1113protected: 1114 explicit RecordType(RecordDecl *D) 1115 : TagType(reinterpret_cast<TagDecl*>(D), QualType()) { } 1116 friend class ASTContext; // ASTContext creates these. 1117public: 1118 1119 RecordDecl *getDecl() const { 1120 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 1121 } 1122 1123 // FIXME: This predicate is a helper to QualType/Type. It needs to 1124 // recursively check all fields for const-ness. If any field is declared 1125 // const, it needs to return false. 1126 bool hasConstFields() const { return false; } 1127 1128 // FIXME: RecordType needs to check when it is created that all fields are in 1129 // the same address space, and return that. 1130 unsigned getAddressSpace() const { return 0; } 1131 1132 static bool classof(const TagType *T); 1133 static bool classof(const Type *T) { 1134 return isa<TagType>(T) && classof(cast<TagType>(T)); 1135 } 1136 static bool classof(const RecordType *) { return true; } 1137}; 1138 1139/// CXXRecordType - This is a helper class that allows the use of 1140/// isa/cast/dyncast to detect TagType objects of C++ structs/unions/classes. 1141class CXXRecordType : public RecordType { 1142 explicit CXXRecordType(CXXRecordDecl *D) 1143 : RecordType(reinterpret_cast<RecordDecl*>(D)) { } 1144 friend class ASTContext; // ASTContext creates these. 1145public: 1146 1147 CXXRecordDecl *getDecl() const { 1148 return reinterpret_cast<CXXRecordDecl*>(RecordType::getDecl()); 1149 } 1150 1151 static bool classof(const TagType *T); 1152 static bool classof(const Type *T) { 1153 return isa<TagType>(T) && classof(cast<TagType>(T)); 1154 } 1155 static bool classof(const CXXRecordType *) { return true; } 1156}; 1157 1158/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 1159/// to detect TagType objects of enums. 1160class EnumType : public TagType { 1161 explicit EnumType(EnumDecl *D) 1162 : TagType(reinterpret_cast<TagDecl*>(D), QualType()) { } 1163 friend class ASTContext; // ASTContext creates these. 1164public: 1165 1166 EnumDecl *getDecl() const { 1167 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 1168 } 1169 1170 static bool classof(const TagType *T); 1171 static bool classof(const Type *T) { 1172 return isa<TagType>(T) && classof(cast<TagType>(T)); 1173 } 1174 static bool classof(const EnumType *) { return true; } 1175}; 1176 1177 1178 1179/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 1180/// object oriented design. They basically correspond to C++ classes. There 1181/// are two kinds of interface types, normal interfaces like "NSString" and 1182/// qualified interfaces, which are qualified with a protocol list like 1183/// "NSString<NSCopyable, NSAmazing>". Qualified interface types are instances 1184/// of ObjCQualifiedInterfaceType, which is a subclass of ObjCInterfaceType. 1185class ObjCInterfaceType : public Type { 1186 ObjCInterfaceDecl *Decl; 1187protected: 1188 ObjCInterfaceType(TypeClass tc, ObjCInterfaceDecl *D) : 1189 Type(tc, QualType()), Decl(D) { } 1190 friend class ASTContext; // ASTContext creates these. 1191public: 1192 1193 ObjCInterfaceDecl *getDecl() const { return Decl; } 1194 1195 /// qual_iterator and friends: this provides access to the (potentially empty) 1196 /// list of protocols qualifying this interface. If this is an instance of 1197 /// ObjCQualifiedInterfaceType it returns the list, otherwise it returns an 1198 /// empty list if there are no qualifying protocols. 1199 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 1200 inline qual_iterator qual_begin() const; 1201 inline qual_iterator qual_end() const; 1202 bool qual_empty() const { return getTypeClass() != ObjCQualifiedInterface; } 1203 1204 /// getNumProtocols - Return the number of qualifying protocols in this 1205 /// interface type, or 0 if there are none. 1206 inline unsigned getNumProtocols() const; 1207 1208 /// getProtocol - Return the specified qualifying protocol. 1209 inline ObjCProtocolDecl *getProtocol(unsigned i) const; 1210 1211 1212 virtual void getAsStringInternal(std::string &InnerString) const; 1213 static bool classof(const Type *T) { 1214 return T->getTypeClass() == ObjCInterface || 1215 T->getTypeClass() == ObjCQualifiedInterface; 1216 } 1217 static bool classof(const ObjCInterfaceType *) { return true; } 1218}; 1219 1220/// ObjCQualifiedInterfaceType - This class represents interface types 1221/// conforming to a list of protocols, such as INTF<Proto1, Proto2, Proto1>. 1222/// 1223/// Duplicate protocols are removed and protocol list is canonicalized to be in 1224/// alphabetical order. 1225class ObjCQualifiedInterfaceType : public ObjCInterfaceType, 1226 public llvm::FoldingSetNode { 1227 1228 // List of protocols for this protocol conforming object type 1229 // List is sorted on protocol name. No protocol is enterred more than once. 1230 llvm::SmallVector<ObjCProtocolDecl*, 4> Protocols; 1231 1232 ObjCQualifiedInterfaceType(ObjCInterfaceDecl *D, 1233 ObjCProtocolDecl **Protos, unsigned NumP) : 1234 ObjCInterfaceType(ObjCQualifiedInterface, D), 1235 Protocols(Protos, Protos+NumP) { } 1236 friend class ASTContext; // ASTContext creates these. 1237public: 1238 1239 ObjCProtocolDecl *getProtocol(unsigned i) const { 1240 return Protocols[i]; 1241 } 1242 unsigned getNumProtocols() const { 1243 return Protocols.size(); 1244 } 1245 1246 qual_iterator qual_begin() const { return Protocols.begin(); } 1247 qual_iterator qual_end() const { return Protocols.end(); } 1248 1249 virtual void getAsStringInternal(std::string &InnerString) const; 1250 1251 void Profile(llvm::FoldingSetNodeID &ID); 1252 static void Profile(llvm::FoldingSetNodeID &ID, 1253 const ObjCInterfaceDecl *Decl, 1254 ObjCProtocolDecl **protocols, unsigned NumProtocols); 1255 1256 static bool classof(const Type *T) { 1257 return T->getTypeClass() == ObjCQualifiedInterface; 1258 } 1259 static bool classof(const ObjCQualifiedInterfaceType *) { return true; } 1260}; 1261 1262inline ObjCInterfaceType::qual_iterator ObjCInterfaceType::qual_begin() const { 1263 if (const ObjCQualifiedInterfaceType *QIT = 1264 dyn_cast<ObjCQualifiedInterfaceType>(this)) 1265 return QIT->qual_begin(); 1266 return 0; 1267} 1268inline ObjCInterfaceType::qual_iterator ObjCInterfaceType::qual_end() const { 1269 if (const ObjCQualifiedInterfaceType *QIT = 1270 dyn_cast<ObjCQualifiedInterfaceType>(this)) 1271 return QIT->qual_end(); 1272 return 0; 1273} 1274 1275/// getNumProtocols - Return the number of qualifying protocols in this 1276/// interface type, or 0 if there are none. 1277inline unsigned ObjCInterfaceType::getNumProtocols() const { 1278 if (const ObjCQualifiedInterfaceType *QIT = 1279 dyn_cast<ObjCQualifiedInterfaceType>(this)) 1280 return QIT->getNumProtocols(); 1281 return 0; 1282} 1283 1284/// getProtocol - Return the specified qualifying protocol. 1285inline ObjCProtocolDecl *ObjCInterfaceType::getProtocol(unsigned i) const { 1286 return cast<ObjCQualifiedInterfaceType>(this)->getProtocol(i); 1287} 1288 1289 1290 1291/// ObjCQualifiedIdType - to represent id<protocol-list>. 1292/// 1293/// Duplicate protocols are removed and protocol list is canonicalized to be in 1294/// alphabetical order. 1295class ObjCQualifiedIdType : public Type, 1296 public llvm::FoldingSetNode { 1297 // List of protocols for this protocol conforming 'id' type 1298 // List is sorted on protocol name. No protocol is enterred more than once. 1299 llvm::SmallVector<ObjCProtocolDecl*, 8> Protocols; 1300 1301 ObjCQualifiedIdType(ObjCProtocolDecl **Protos, unsigned NumP) 1302 : Type(ObjCQualifiedId, QualType()/*these are always canonical*/), 1303 Protocols(Protos, Protos+NumP) { } 1304 friend class ASTContext; // ASTContext creates these. 1305public: 1306 1307 ObjCProtocolDecl *getProtocols(unsigned i) const { 1308 return Protocols[i]; 1309 } 1310 unsigned getNumProtocols() const { 1311 return Protocols.size(); 1312 } 1313 ObjCProtocolDecl **getReferencedProtocols() { 1314 return &Protocols[0]; 1315 } 1316 1317 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 1318 qual_iterator qual_begin() const { return Protocols.begin(); } 1319 qual_iterator qual_end() const { return Protocols.end(); } 1320 1321 virtual void getAsStringInternal(std::string &InnerString) const; 1322 1323 void Profile(llvm::FoldingSetNodeID &ID); 1324 static void Profile(llvm::FoldingSetNodeID &ID, 1325 ObjCProtocolDecl **protocols, unsigned NumProtocols); 1326 1327 static bool classof(const Type *T) { 1328 return T->getTypeClass() == ObjCQualifiedId; 1329 } 1330 static bool classof(const ObjCQualifiedIdType *) { return true; } 1331 1332}; 1333 1334 1335// Inline function definitions. 1336 1337/// getUnqualifiedType - Return the type without any qualifiers. 1338inline QualType QualType::getUnqualifiedType() const { 1339 Type *TP = getTypePtr(); 1340 if (const ASQualType *ASQT = dyn_cast<ASQualType>(TP)) 1341 TP = ASQT->getBaseType(); 1342 return QualType(TP, 0); 1343} 1344 1345/// getAddressSpace - Return the address space of this type. 1346inline unsigned QualType::getAddressSpace() const { 1347 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 1348 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 1349 return AT->getElementType().getAddressSpace(); 1350 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 1351 return RT->getAddressSpace(); 1352 if (const ASQualType *ASQT = dyn_cast<ASQualType>(CT)) 1353 return ASQT->getAddressSpace(); 1354 return 0; 1355} 1356 1357/// isMoreQualifiedThan - Determine whether this type is more 1358/// qualified than the Other type. For example, "const volatile int" 1359/// is more qualified than "const int", "volatile int", and 1360/// "int". However, it is not more qualified than "const volatile 1361/// int". 1362inline bool QualType::isMoreQualifiedThan(QualType Other) const { 1363 // FIXME: Handle address spaces 1364 unsigned MyQuals = this->getCVRQualifiers(); 1365 unsigned OtherQuals = Other.getCVRQualifiers(); 1366 assert(this->getAddressSpace() == 0 && "Address space not checked"); 1367 assert(Other.getAddressSpace() == 0 && "Address space not checked"); 1368 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 1369} 1370 1371/// isAtLeastAsQualifiedAs - Determine whether this type is at last 1372/// as qualified as the Other type. For example, "const volatile 1373/// int" is at least as qualified as "const int", "volatile int", 1374/// "int", and "const volatile int". 1375inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 1376 // FIXME: Handle address spaces 1377 unsigned MyQuals = this->getCVRQualifiers(); 1378 unsigned OtherQuals = Other.getCVRQualifiers(); 1379 assert(this->getAddressSpace() == 0 && "Address space not checked"); 1380 assert(Other.getAddressSpace() == 0 && "Address space not checked"); 1381 return (MyQuals | OtherQuals) == MyQuals; 1382} 1383 1384/// getNonReferenceType - If Type is a reference type (e.g., const 1385/// int&), returns the type that the reference refers to ("const 1386/// int"). Otherwise, returns the type itself. This routine is used 1387/// throughout Sema to implement C++ 5p6: 1388/// 1389/// If an expression initially has the type "reference to T" (8.3.2, 1390/// 8.5.3), the type is adjusted to "T" prior to any further 1391/// analysis, the expression designates the object or function 1392/// denoted by the reference, and the expression is an lvalue. 1393inline QualType QualType::getNonReferenceType() const { 1394 if (const ReferenceType *RefType = (*this)->getAsReferenceType()) 1395 return RefType->getPointeeType(); 1396 else 1397 return *this; 1398} 1399 1400inline const TypedefType* Type::getAsTypedefType() const { 1401 return dyn_cast<TypedefType>(this); 1402} 1403inline const ObjCInterfaceType *Type::getAsPointerToObjCInterfaceType() const { 1404 if (const PointerType *PT = getAsPointerType()) 1405 return PT->getPointeeType()->getAsObjCInterfaceType(); 1406 return 0; 1407} 1408 1409// NOTE: All of these methods use "getUnqualifiedType" to strip off address 1410// space qualifiers if present. 1411inline bool Type::isFunctionType() const { 1412 return isa<FunctionType>(CanonicalType.getUnqualifiedType()); 1413} 1414inline bool Type::isPointerType() const { 1415 return isa<PointerType>(CanonicalType.getUnqualifiedType()); 1416} 1417inline bool Type::isBlockPointerType() const { 1418 return isa<BlockPointerType>(CanonicalType); 1419} 1420inline bool Type::isReferenceType() const { 1421 return isa<ReferenceType>(CanonicalType.getUnqualifiedType()); 1422} 1423inline bool Type::isPointerLikeType() const { 1424 return isa<PointerLikeType>(CanonicalType.getUnqualifiedType()); 1425} 1426inline bool Type::isFunctionPointerType() const { 1427 if (const PointerType* T = getAsPointerType()) 1428 return T->getPointeeType()->isFunctionType(); 1429 else 1430 return false; 1431} 1432inline bool Type::isArrayType() const { 1433 return isa<ArrayType>(CanonicalType.getUnqualifiedType()); 1434} 1435inline bool Type::isConstantArrayType() const { 1436 return isa<ConstantArrayType>(CanonicalType.getUnqualifiedType()); 1437} 1438inline bool Type::isIncompleteArrayType() const { 1439 return isa<IncompleteArrayType>(CanonicalType.getUnqualifiedType()); 1440} 1441inline bool Type::isVariableArrayType() const { 1442 return isa<VariableArrayType>(CanonicalType.getUnqualifiedType()); 1443} 1444inline bool Type::isRecordType() const { 1445 return isa<RecordType>(CanonicalType.getUnqualifiedType()); 1446} 1447inline bool Type::isAnyComplexType() const { 1448 return isa<ComplexType>(CanonicalType.getUnqualifiedType()); 1449} 1450inline bool Type::isVectorType() const { 1451 return isa<VectorType>(CanonicalType.getUnqualifiedType()); 1452} 1453inline bool Type::isExtVectorType() const { 1454 return isa<ExtVectorType>(CanonicalType.getUnqualifiedType()); 1455} 1456inline bool Type::isObjCInterfaceType() const { 1457 return isa<ObjCInterfaceType>(CanonicalType.getUnqualifiedType()); 1458} 1459inline bool Type::isObjCQualifiedInterfaceType() const { 1460 return isa<ObjCQualifiedInterfaceType>(CanonicalType.getUnqualifiedType()); 1461} 1462inline bool Type::isObjCQualifiedIdType() const { 1463 return isa<ObjCQualifiedIdType>(CanonicalType.getUnqualifiedType()); 1464} 1465inline bool Type::isOverloadType() const { 1466 if (const BuiltinType *BT = getAsBuiltinType()) 1467 return BT->getKind() == BuiltinType::Overload; 1468 else 1469 return false; 1470} 1471 1472/// Insertion operator for diagnostics. This allows sending QualType's into a 1473/// diagnostic with <<. 1474inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 1475 QualType T) { 1476 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 1477 Diagnostic::ak_qualtype); 1478 return DB; 1479} 1480 1481} // end namespace clang 1482 1483#endif 1484