Type.h revision 72c3f314d92d65c050ee1c07b7753623c044d6c7
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 TemplateTypeParmDecl; 34 class TagDecl; 35 class RecordDecl; 36 class CXXRecordDecl; 37 class EnumDecl; 38 class FieldDecl; 39 class ObjCInterfaceDecl; 40 class ObjCProtocolDecl; 41 class ObjCMethodDecl; 42 class Expr; 43 class Stmt; 44 class SourceLocation; 45 class PointerLikeType; 46 class PointerType; 47 class BlockPointerType; 48 class ReferenceType; 49 class VectorType; 50 class ArrayType; 51 class ConstantArrayType; 52 class VariableArrayType; 53 class IncompleteArrayType; 54 class RecordType; 55 class EnumType; 56 class ComplexType; 57 class TagType; 58 class TypedefType; 59 class TemplateTypeParmType; 60 class FunctionType; 61 class FunctionTypeProto; 62 class ExtVectorType; 63 class BuiltinType; 64 class ObjCInterfaceType; 65 class ObjCQualifiedIdType; 66 class ObjCQualifiedInterfaceType; 67 class StmtIteratorBase; 68 69/// QualType - For efficiency, we don't store CVR-qualified types as nodes on 70/// their own: instead each reference to a type stores the qualifiers. This 71/// greatly reduces the number of nodes we need to allocate for types (for 72/// example we only need one for 'int', 'const int', 'volatile int', 73/// 'const volatile int', etc). 74/// 75/// As an added efficiency bonus, instead of making this a pair, we just store 76/// the three bits we care about in the low bits of the pointer. To handle the 77/// packing/unpacking, we make QualType be a simple wrapper class that acts like 78/// a smart pointer. 79class QualType { 80 llvm::PointerIntPair<Type*, 3> Value; 81public: 82 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 83 Const = 0x1, 84 Restrict = 0x2, 85 Volatile = 0x4, 86 CVRFlags = Const|Restrict|Volatile 87 }; 88 89 QualType() {} 90 91 QualType(const Type *Ptr, unsigned Quals) 92 : Value(const_cast<Type*>(Ptr), Quals) {} 93 94 unsigned getCVRQualifiers() const { return Value.getInt(); } 95 Type *getTypePtr() const { return Value.getPointer(); } 96 97 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 98 static QualType getFromOpaquePtr(void *Ptr) { 99 QualType T; 100 T.Value.setFromOpaqueValue(Ptr); 101 return T; 102 } 103 104 Type &operator*() const { 105 return *getTypePtr(); 106 } 107 108 Type *operator->() const { 109 return getTypePtr(); 110 } 111 112 /// isNull - Return true if this QualType doesn't point to a type yet. 113 bool isNull() const { 114 return getTypePtr() == 0; 115 } 116 117 bool isConstQualified() const { 118 return (getCVRQualifiers() & Const) ? true : false; 119 } 120 bool isVolatileQualified() const { 121 return (getCVRQualifiers() & Volatile) ? true : false; 122 } 123 bool isRestrictQualified() const { 124 return (getCVRQualifiers() & Restrict) ? true : false; 125 } 126 127 bool isConstant(ASTContext& Ctx) const; 128 129 /// addConst/addVolatile/addRestrict - add the specified type qual to this 130 /// QualType. 131 void addConst() { Value.setInt(Value.getInt() | Const); } 132 void addVolatile() { Value.setInt(Value.getInt() | Volatile); } 133 void addRestrict() { Value.setInt(Value.getInt() | Restrict); } 134 135 void removeConst() { Value.setInt(Value.getInt() & ~Const); } 136 void removeVolatile() { Value.setInt(Value.getInt() & ~Volatile); } 137 void removeRestrict() { Value.setInt(Value.getInt() & ~Restrict); } 138 139 QualType getQualifiedType(unsigned TQs) const { 140 return QualType(getTypePtr(), TQs); 141 } 142 QualType getWithAdditionalQualifiers(unsigned TQs) const { 143 return QualType(getTypePtr(), TQs|getCVRQualifiers()); 144 } 145 146 QualType withConst() const { return getWithAdditionalQualifiers(Const); } 147 QualType withVolatile() const { return getWithAdditionalQualifiers(Volatile);} 148 QualType withRestrict() const { return getWithAdditionalQualifiers(Restrict);} 149 150 QualType getUnqualifiedType() const; 151 bool isMoreQualifiedThan(QualType Other) const; 152 bool isAtLeastAsQualifiedAs(QualType Other) const; 153 QualType getNonReferenceType() const; 154 155 156 /// operator==/!= - Indicate whether the specified types and qualifiers are 157 /// identical. 158 bool operator==(const QualType &RHS) const { 159 return Value == RHS.Value; 160 } 161 bool operator!=(const QualType &RHS) const { 162 return Value != RHS.Value; 163 } 164 std::string getAsString() const { 165 std::string S; 166 getAsStringInternal(S); 167 return S; 168 } 169 void getAsStringInternal(std::string &Str) const; 170 171 void dump(const char *s) const; 172 void dump() const; 173 174 void Profile(llvm::FoldingSetNodeID &ID) const { 175 ID.AddPointer(getAsOpaquePtr()); 176 } 177 178public: 179 180 /// getAddressSpace - Return the address space of this type. 181 inline unsigned getAddressSpace() const; 182 183 /// Emit - Serialize a QualType to Bitcode. 184 void Emit(llvm::Serializer& S) const; 185 186 /// Read - Deserialize a QualType from Bitcode. 187 static QualType ReadVal(llvm::Deserializer& D); 188 189 void ReadBackpatch(llvm::Deserializer& D); 190}; 191 192} // end clang. 193 194namespace llvm { 195/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 196/// to a specific Type class. 197template<> struct simplify_type<const ::clang::QualType> { 198 typedef ::clang::Type* SimpleType; 199 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 200 return Val.getTypePtr(); 201 } 202}; 203template<> struct simplify_type< ::clang::QualType> 204 : public simplify_type<const ::clang::QualType> {}; 205 206} // end namespace llvm 207 208namespace clang { 209 210/// Type - This is the base class of the type hierarchy. A central concept 211/// with types is that each type always has a canonical type. A canonical type 212/// is the type with any typedef names stripped out of it or the types it 213/// references. For example, consider: 214/// 215/// typedef int foo; 216/// typedef foo* bar; 217/// 'int *' 'foo *' 'bar' 218/// 219/// There will be a Type object created for 'int'. Since int is canonical, its 220/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 221/// TypeNameType). Its CanonicalType pointer points to the 'int' Type. Next 222/// there is a PointerType that represents 'int*', which, like 'int', is 223/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 224/// type is 'int*', and there is a TypeNameType for 'bar', whose canonical type 225/// is also 'int*'. 226/// 227/// Non-canonical types are useful for emitting diagnostics, without losing 228/// information about typedefs being used. Canonical types are useful for type 229/// comparisons (they allow by-pointer equality tests) and useful for reasoning 230/// about whether something has a particular form (e.g. is a function type), 231/// because they implicitly, recursively, strip all typedefs out of a type. 232/// 233/// Types, once created, are immutable. 234/// 235class Type { 236public: 237 enum TypeClass { 238 Builtin, Complex, Pointer, Reference, 239 ConstantArray, VariableArray, IncompleteArray, 240 Vector, ExtVector, 241 FunctionNoProto, FunctionProto, 242 TypeName, Tagged, ASQual, 243 TemplateTypeParm, 244 ObjCInterface, ObjCQualifiedInterface, 245 ObjCQualifiedId, 246 TypeOfExp, TypeOfTyp, // GNU typeof extension. 247 BlockPointer // C extension 248 }; 249private: 250 QualType CanonicalType; 251 252 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 253 /// Note that this should stay at the end of the ivars for Type so that 254 /// subclasses can pack their bitfields into the same word. 255 unsigned TC : 5; 256protected: 257 // silence VC++ warning C4355: 'this' : used in base member initializer list 258 Type *this_() { return this; } 259 Type(TypeClass tc, QualType Canonical) 260 : CanonicalType(Canonical.isNull() ? QualType(this_(), 0) : Canonical), 261 TC(tc) {} 262 virtual ~Type() {}; 263 virtual void Destroy(ASTContext& C); 264 friend class ASTContext; 265 266 void EmitTypeInternal(llvm::Serializer& S) const; 267 void ReadTypeInternal(llvm::Deserializer& D); 268 269public: 270 TypeClass getTypeClass() const { return static_cast<TypeClass>(TC); } 271 272 bool isCanonical() const { return CanonicalType.getTypePtr() == this; } 273 274 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 275 /// object types, function types, and incomplete types. 276 277 /// isObjectType - types that fully describe objects. An object is a region 278 /// of memory that can be examined and stored into (H&S). 279 bool isObjectType() const; 280 281 /// isIncompleteType - Return true if this is an incomplete type. 282 /// A type that can describe objects, but which lacks information needed to 283 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 284 /// routine will need to determine if the size is actually required. 285 bool isIncompleteType() const; 286 287 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 288 /// type, in other words, not a function type. 289 bool isIncompleteOrObjectType() const { 290 return !isFunctionType(); 291 } 292 293 /// isVariablyModifiedType (C99 6.7.5.2p2) - Return true for variable array 294 /// types that have a non-constant expression. This does not include "[]". 295 bool isVariablyModifiedType() const; 296 297 /// Helper methods to distinguish type categories. All type predicates 298 /// operate on the canonical type, ignoring typedefs and qualifiers. 299 300 /// isIntegerType() does *not* include complex integers (a GCC extension). 301 /// isComplexIntegerType() can be used to test for complex integers. 302 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 303 bool isEnumeralType() const; 304 bool isBooleanType() const; 305 bool isCharType() const; 306 bool isWideCharType() const; 307 bool isIntegralType() const; 308 309 /// Floating point categories. 310 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 311 /// isComplexType() does *not* include complex integers (a GCC extension). 312 /// isComplexIntegerType() can be used to test for complex integers. 313 bool isComplexType() const; // C99 6.2.5p11 (complex) 314 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 315 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 316 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 317 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 318 bool isVoidType() const; // C99 6.2.5p19 319 bool isDerivedType() const; // C99 6.2.5p20 320 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 321 bool isAggregateType() const; // C99 6.2.5p21 (arrays, structures) 322 323 // Type Predicates: Check to see if this type is structurally the specified 324 // type, ignoring typedefs and qualifiers. 325 bool isFunctionType() const; 326 bool isPointerLikeType() const; // Pointer or Reference. 327 bool isPointerType() const; 328 bool isBlockPointerType() const; 329 bool isReferenceType() const; 330 bool isFunctionPointerType() const; 331 bool isArrayType() const; 332 bool isConstantArrayType() const; 333 bool isIncompleteArrayType() const; 334 bool isVariableArrayType() const; 335 bool isRecordType() const; 336 bool isClassType() const; 337 bool isStructureType() const; 338 bool isUnionType() const; 339 bool isComplexIntegerType() const; // GCC _Complex integer type. 340 bool isVectorType() const; // GCC vector type. 341 bool isExtVectorType() const; // Extended vector type. 342 bool isObjCInterfaceType() const; // NSString or NSString<foo> 343 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 344 bool isObjCQualifiedIdType() const; // id<foo> 345 bool isTemplateTypeParmType() const; // C++ template type parameter 346 bool isOverloadType() const; // C++ overloaded function 347 348 // Type Checking Functions: Check to see if this type is structurally the 349 // specified type, ignoring typedefs and qualifiers, and return a pointer to 350 // the best type we can. 351 const BuiltinType *getAsBuiltinType() const; 352 const FunctionType *getAsFunctionType() const; 353 const FunctionTypeProto *getAsFunctionTypeProto() const; 354 const PointerLikeType *getAsPointerLikeType() const; // Pointer or Reference. 355 const PointerType *getAsPointerType() const; 356 const BlockPointerType *getAsBlockPointerType() const; 357 const ReferenceType *getAsReferenceType() const; 358 const RecordType *getAsRecordType() const; 359 const RecordType *getAsStructureType() const; 360 /// NOTE: getAsArrayType* are methods on ASTContext. 361 const TypedefType *getAsTypedefType() const; 362 const RecordType *getAsUnionType() const; 363 const EnumType *getAsEnumType() const; 364 const VectorType *getAsVectorType() const; // GCC vector type. 365 const ComplexType *getAsComplexType() const; 366 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 367 const ExtVectorType *getAsExtVectorType() const; // Extended vector type. 368 const ObjCInterfaceType *getAsObjCInterfaceType() const; 369 const ObjCQualifiedInterfaceType *getAsObjCQualifiedInterfaceType() const; 370 const ObjCQualifiedIdType *getAsObjCQualifiedIdType() const; 371 const TemplateTypeParmType *getAsTemplateTypeParmType() const; 372 373 /// getAsPointerToObjCInterfaceType - If this is a pointer to an ObjC 374 /// interface, return the interface type, otherwise return null. 375 const ObjCInterfaceType *getAsPointerToObjCInterfaceType() const; 376 377 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 378 /// element type of the array, potentially with type qualifiers missing. 379 /// This method should never be used when type qualifiers are meaningful. 380 const Type *getArrayElementTypeNoTypeQual() const; 381 382 383 384 /// getDesugaredType - Return the specified type with any "sugar" removed from 385 /// the type. This takes off typedefs, typeof's etc. If the outer level of 386 /// the type is already concrete, it returns it unmodified. This is similar 387 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 388 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 389 /// concrete. 390 QualType getDesugaredType() const; 391 392 /// More type predicates useful for type checking/promotion 393 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 394 395 /// isSignedIntegerType - Return true if this is an integer type that is 396 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 397 /// an enum decl which has a signed representation, or a vector of signed 398 /// integer element type. 399 bool isSignedIntegerType() const; 400 401 /// isUnsignedIntegerType - Return true if this is an integer type that is 402 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 403 /// decl which has an unsigned representation, or a vector of unsigned integer 404 /// element type. 405 bool isUnsignedIntegerType() const; 406 407 /// isConstantSizeType - Return true if this is not a variable sized type, 408 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 409 /// incomplete types. 410 bool isConstantSizeType() const; 411 412 QualType getCanonicalTypeInternal() const { return CanonicalType; } 413 void dump() const; 414 virtual void getAsStringInternal(std::string &InnerString) const = 0; 415 static bool classof(const Type *) { return true; } 416 417protected: 418 /// Emit - Emit a Type to bitcode. Used by ASTContext. 419 void Emit(llvm::Serializer& S) const; 420 421 /// Create - Construct a Type from bitcode. Used by ASTContext. 422 static void Create(ASTContext& Context, unsigned i, llvm::Deserializer& S); 423 424 /// EmitImpl - Subclasses must implement this method in order to 425 /// be serialized. 426 // FIXME: Make this abstract once implemented. 427 virtual void EmitImpl(llvm::Serializer& S) const { 428 assert (false && "Serializization for type not supported."); 429 } 430}; 431 432/// ASQualType - TR18037 (C embedded extensions) 6.2.5p26 433/// This supports address space qualified types. 434/// 435class ASQualType : public Type, public llvm::FoldingSetNode { 436 /// BaseType - This is the underlying type that this qualifies. All CVR 437 /// qualifiers are stored on the QualType that references this type, so we 438 /// can't have any here. 439 Type *BaseType; 440 /// Address Space ID - The address space ID this type is qualified with. 441 unsigned AddressSpace; 442 ASQualType(Type *Base, QualType CanonicalPtr, unsigned AddrSpace) : 443 Type(ASQual, CanonicalPtr), BaseType(Base), AddressSpace(AddrSpace) { 444 } 445 friend class ASTContext; // ASTContext creates these. 446public: 447 Type *getBaseType() const { return BaseType; } 448 unsigned getAddressSpace() const { return AddressSpace; } 449 450 virtual void getAsStringInternal(std::string &InnerString) const; 451 452 void Profile(llvm::FoldingSetNodeID &ID) { 453 Profile(ID, getBaseType(), AddressSpace); 454 } 455 static void Profile(llvm::FoldingSetNodeID &ID, Type *Base, 456 unsigned AddrSpace) { 457 ID.AddPointer(Base); 458 ID.AddInteger(AddrSpace); 459 } 460 461 static bool classof(const Type *T) { return T->getTypeClass() == ASQual; } 462 static bool classof(const ASQualType *) { return true; } 463 464protected: 465 virtual void EmitImpl(llvm::Serializer& S) const; 466 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 467 friend class Type; 468}; 469 470 471/// BuiltinType - This class is used for builtin types like 'int'. Builtin 472/// types are always canonical and have a literal name field. 473class BuiltinType : public Type { 474public: 475 enum Kind { 476 Void, 477 478 Bool, // This is bool and/or _Bool. 479 Char_U, // This is 'char' for targets where char is unsigned. 480 UChar, // This is explicitly qualified unsigned char. 481 UShort, 482 UInt, 483 ULong, 484 ULongLong, 485 486 Char_S, // This is 'char' for targets where char is signed. 487 SChar, // This is explicitly qualified signed char. 488 WChar, // This is 'wchar_t' for C++. 489 Short, 490 Int, 491 Long, 492 LongLong, 493 494 Float, Double, LongDouble, 495 496 Overload // This represents the type of an overloaded function declaration. 497 }; 498private: 499 Kind TypeKind; 500public: 501 BuiltinType(Kind K) : Type(Builtin, QualType()), TypeKind(K) {} 502 503 Kind getKind() const { return TypeKind; } 504 const char *getName() const; 505 506 virtual void getAsStringInternal(std::string &InnerString) const; 507 508 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 509 static bool classof(const BuiltinType *) { return true; } 510}; 511 512/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 513/// types (_Complex float etc) as well as the GCC integer complex extensions. 514/// 515class ComplexType : public Type, public llvm::FoldingSetNode { 516 QualType ElementType; 517 ComplexType(QualType Element, QualType CanonicalPtr) : 518 Type(Complex, CanonicalPtr), ElementType(Element) { 519 } 520 friend class ASTContext; // ASTContext creates these. 521public: 522 QualType getElementType() const { return ElementType; } 523 524 virtual void getAsStringInternal(std::string &InnerString) const; 525 526 void Profile(llvm::FoldingSetNodeID &ID) { 527 Profile(ID, getElementType()); 528 } 529 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 530 ID.AddPointer(Element.getAsOpaquePtr()); 531 } 532 533 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 534 static bool classof(const ComplexType *) { return true; } 535 536protected: 537 virtual void EmitImpl(llvm::Serializer& S) const; 538 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 539 friend class Type; 540}; 541 542/// PointerLikeType - Common base class for pointers and references. 543/// FIXME: Add more documentation on this classes design point. For example, 544/// should BlockPointerType inherit from it? Is the concept of a PointerLikeType 545/// in the C++ standard? 546/// 547class PointerLikeType : public Type { 548 QualType PointeeType; 549protected: 550 PointerLikeType(TypeClass K, QualType Pointee, QualType CanonicalPtr) : 551 Type(K, CanonicalPtr), PointeeType(Pointee) { 552 } 553public: 554 555 QualType getPointeeType() const { return PointeeType; } 556 557 static bool classof(const Type *T) { 558 return T->getTypeClass() == Pointer || T->getTypeClass() == Reference; 559 } 560 static bool classof(const PointerLikeType *) { return true; } 561}; 562 563/// PointerType - C99 6.7.5.1 - Pointer Declarators. 564/// 565class PointerType : public PointerLikeType, public llvm::FoldingSetNode { 566 PointerType(QualType Pointee, QualType CanonicalPtr) : 567 PointerLikeType(Pointer, Pointee, CanonicalPtr) { 568 } 569 friend class ASTContext; // ASTContext creates these. 570public: 571 572 virtual void getAsStringInternal(std::string &InnerString) const; 573 574 void Profile(llvm::FoldingSetNodeID &ID) { 575 Profile(ID, getPointeeType()); 576 } 577 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 578 ID.AddPointer(Pointee.getAsOpaquePtr()); 579 } 580 581 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 582 static bool classof(const PointerType *) { return true; } 583 584protected: 585 virtual void EmitImpl(llvm::Serializer& S) const; 586 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 587 friend class Type; 588}; 589 590/// BlockPointerType - pointer to a block type. 591/// This type is to represent types syntactically represented as 592/// "void (^)(int)", etc. Pointee is required to always be a function type. 593/// FIXME: Should BlockPointerType inherit from PointerLikeType? It could 594/// simplfy some type checking code, however PointerLikeType doesn't appear 595/// to be used by the type checker. 596/// 597class BlockPointerType : public Type, public llvm::FoldingSetNode { 598 QualType PointeeType; // Block is some kind of pointer type 599 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 600 Type(BlockPointer, CanonicalCls), PointeeType(Pointee) { 601 } 602 friend class ASTContext; // ASTContext creates these. 603public: 604 605 // Get the pointee type. Pointee is required to always be a function type. 606 QualType getPointeeType() const { return PointeeType; } 607 608 virtual void getAsStringInternal(std::string &InnerString) const; 609 610 void Profile(llvm::FoldingSetNodeID &ID) { 611 Profile(ID, getPointeeType()); 612 } 613 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 614 ID.AddPointer(Pointee.getAsOpaquePtr()); 615 } 616 617 static bool classof(const Type *T) { 618 return T->getTypeClass() == BlockPointer; 619 } 620 static bool classof(const BlockPointerType *) { return true; } 621 622 protected: 623 virtual void EmitImpl(llvm::Serializer& S) const; 624 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 625 friend class Type; 626}; 627 628/// ReferenceType - C++ 8.3.2 - Reference Declarators. 629/// 630class ReferenceType : public PointerLikeType, public llvm::FoldingSetNode { 631 ReferenceType(QualType Referencee, QualType CanonicalRef) : 632 PointerLikeType(Reference, Referencee, CanonicalRef) { 633 } 634 friend class ASTContext; // ASTContext creates these. 635public: 636 virtual void getAsStringInternal(std::string &InnerString) const; 637 638 void Profile(llvm::FoldingSetNodeID &ID) { 639 Profile(ID, getPointeeType()); 640 } 641 static void Profile(llvm::FoldingSetNodeID &ID, QualType Referencee) { 642 ID.AddPointer(Referencee.getAsOpaquePtr()); 643 } 644 645 static bool classof(const Type *T) { return T->getTypeClass() == Reference; } 646 static bool classof(const ReferenceType *) { return true; } 647}; 648 649/// ArrayType - C99 6.7.5.2 - Array Declarators. 650/// 651class ArrayType : public Type, public llvm::FoldingSetNode { 652public: 653 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 654 /// an array with a static size (e.g. int X[static 4]), or with a star size 655 /// (e.g. int X[*]). 'static' is only allowed on function parameters. 656 enum ArraySizeModifier { 657 Normal, Static, Star 658 }; 659private: 660 /// ElementType - The element type of the array. 661 QualType ElementType; 662 663 // NOTE: VC++ treats enums as signed, avoid using the ArraySizeModifier enum 664 /// NOTE: These fields are packed into the bitfields space in the Type class. 665 unsigned SizeModifier : 2; 666 667 /// IndexTypeQuals - Capture qualifiers in declarations like: 668 /// 'int X[static restrict 4]'. For function parameters only. 669 unsigned IndexTypeQuals : 3; 670 671protected: 672 ArrayType(TypeClass tc, QualType et, QualType can, 673 ArraySizeModifier sm, unsigned tq) 674 : Type(tc, can), ElementType(et), SizeModifier(sm), IndexTypeQuals(tq) {} 675 friend class ASTContext; // ASTContext creates these. 676public: 677 QualType getElementType() const { return ElementType; } 678 ArraySizeModifier getSizeModifier() const { 679 return ArraySizeModifier(SizeModifier); 680 } 681 unsigned getIndexTypeQualifier() const { return IndexTypeQuals; } 682 683 static bool classof(const Type *T) { 684 return T->getTypeClass() == ConstantArray || 685 T->getTypeClass() == VariableArray || 686 T->getTypeClass() == IncompleteArray; 687 } 688 static bool classof(const ArrayType *) { return true; } 689}; 690 691/// ConstantArrayType - This class represents C arrays with a specified constant 692/// size. For example 'int A[100]' has ConstantArrayType where the element type 693/// is 'int' and the size is 100. 694class ConstantArrayType : public ArrayType { 695 llvm::APInt Size; // Allows us to unique the type. 696 697 ConstantArrayType(QualType et, QualType can, llvm::APInt sz, 698 ArraySizeModifier sm, unsigned tq) 699 : ArrayType(ConstantArray, et, can, sm, tq), Size(sz) {} 700 friend class ASTContext; // ASTContext creates these. 701public: 702 const llvm::APInt &getSize() const { return Size; } 703 virtual void getAsStringInternal(std::string &InnerString) const; 704 705 void Profile(llvm::FoldingSetNodeID &ID) { 706 Profile(ID, getElementType(), getSize()); 707 } 708 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 709 llvm::APInt ArraySize) { 710 ID.AddPointer(ET.getAsOpaquePtr()); 711 ID.AddInteger(ArraySize.getZExtValue()); 712 } 713 static bool classof(const Type *T) { 714 return T->getTypeClass() == ConstantArray; 715 } 716 static bool classof(const ConstantArrayType *) { return true; } 717 718protected: 719 virtual void EmitImpl(llvm::Serializer& S) const; 720 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 721 friend class Type; 722}; 723 724/// IncompleteArrayType - This class represents C arrays with an unspecified 725/// size. For example 'int A[]' has an IncompleteArrayType where the element 726/// type is 'int' and the size is unspecified. 727class IncompleteArrayType : public ArrayType { 728 IncompleteArrayType(QualType et, QualType can, 729 ArraySizeModifier sm, unsigned tq) 730 : ArrayType(IncompleteArray, et, can, sm, tq) {} 731 friend class ASTContext; // ASTContext creates these. 732public: 733 734 virtual void getAsStringInternal(std::string &InnerString) const; 735 736 static bool classof(const Type *T) { 737 return T->getTypeClass() == IncompleteArray; 738 } 739 static bool classof(const IncompleteArrayType *) { return true; } 740 741 friend class StmtIteratorBase; 742 743 void Profile(llvm::FoldingSetNodeID &ID) { 744 Profile(ID, getElementType()); 745 } 746 747 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET) { 748 ID.AddPointer(ET.getAsOpaquePtr()); 749 } 750 751protected: 752 virtual void EmitImpl(llvm::Serializer& S) const; 753 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 754 friend class Type; 755}; 756 757/// VariableArrayType - This class represents C arrays with a specified size 758/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 759/// Since the size expression is an arbitrary expression, we store it as such. 760/// 761/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 762/// should not be: two lexically equivalent variable array types could mean 763/// different things, for example, these variables do not have the same type 764/// dynamically: 765/// 766/// void foo(int x) { 767/// int Y[x]; 768/// ++x; 769/// int Z[x]; 770/// } 771/// 772class VariableArrayType : public ArrayType { 773 /// SizeExpr - An assignment expression. VLA's are only permitted within 774 /// a function block. 775 Stmt *SizeExpr; 776 777 VariableArrayType(QualType et, QualType can, Expr *e, 778 ArraySizeModifier sm, unsigned tq) 779 : ArrayType(VariableArray, et, can, sm, tq), SizeExpr((Stmt*) e) {} 780 friend class ASTContext; // ASTContext creates these. 781 virtual void Destroy(ASTContext& C); 782 783public: 784 Expr *getSizeExpr() const { 785 // We use C-style casts instead of cast<> here because we do not wish 786 // to have a dependency of Type.h on Stmt.h/Expr.h. 787 return (Expr*) SizeExpr; 788 } 789 790 virtual void getAsStringInternal(std::string &InnerString) const; 791 792 static bool classof(const Type *T) { 793 return T->getTypeClass() == VariableArray; 794 } 795 static bool classof(const VariableArrayType *) { return true; } 796 797 friend class StmtIteratorBase; 798 799 void Profile(llvm::FoldingSetNodeID &ID) { 800 assert (0 && "Cannnot unique VariableArrayTypes."); 801 } 802 803protected: 804 virtual void EmitImpl(llvm::Serializer& S) const; 805 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 806 friend class Type; 807}; 808 809/// VectorType - GCC generic vector type. This type is created using 810/// __attribute__((vector_size(n)), where "n" specifies the vector size in 811/// bytes. Since the constructor takes the number of vector elements, the 812/// client is responsible for converting the size into the number of elements. 813class VectorType : public Type, public llvm::FoldingSetNode { 814protected: 815 /// ElementType - The element type of the vector. 816 QualType ElementType; 817 818 /// NumElements - The number of elements in the vector. 819 unsigned NumElements; 820 821 VectorType(QualType vecType, unsigned nElements, QualType canonType) : 822 Type(Vector, canonType), ElementType(vecType), NumElements(nElements) {} 823 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 824 QualType canonType) : Type(tc, canonType), ElementType(vecType), 825 NumElements(nElements) {} 826 friend class ASTContext; // ASTContext creates these. 827public: 828 829 QualType getElementType() const { return ElementType; } 830 unsigned getNumElements() const { return NumElements; } 831 832 virtual void getAsStringInternal(std::string &InnerString) const; 833 834 void Profile(llvm::FoldingSetNodeID &ID) { 835 Profile(ID, getElementType(), getNumElements(), getTypeClass()); 836 } 837 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 838 unsigned NumElements, TypeClass TypeClass) { 839 ID.AddPointer(ElementType.getAsOpaquePtr()); 840 ID.AddInteger(NumElements); 841 ID.AddInteger(TypeClass); 842 } 843 static bool classof(const Type *T) { 844 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 845 } 846 static bool classof(const VectorType *) { return true; } 847}; 848 849/// ExtVectorType - Extended vector type. This type is created using 850/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 851/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 852/// class enables syntactic extensions, like Vector Components for accessing 853/// points, colors, and textures (modeled after OpenGL Shading Language). 854class ExtVectorType : public VectorType { 855 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 856 VectorType(ExtVector, vecType, nElements, canonType) {} 857 friend class ASTContext; // ASTContext creates these. 858public: 859 static int getPointAccessorIdx(char c) { 860 switch (c) { 861 default: return -1; 862 case 'x': return 0; 863 case 'y': return 1; 864 case 'z': return 2; 865 case 'w': return 3; 866 } 867 } 868 static int getColorAccessorIdx(char c) { 869 switch (c) { 870 default: return -1; 871 case 'r': return 0; 872 case 'g': return 1; 873 case 'b': return 2; 874 case 'a': return 3; 875 } 876 } 877 static int getTextureAccessorIdx(char c) { 878 switch (c) { 879 default: return -1; 880 case 's': return 0; 881 case 't': return 1; 882 case 'p': return 2; 883 case 'q': return 3; 884 } 885 }; 886 887 static int getAccessorIdx(char c) { 888 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 889 if (int idx = getColorAccessorIdx(c)+1) return idx-1; 890 return getTextureAccessorIdx(c); 891 } 892 893 bool isAccessorWithinNumElements(char c) const { 894 if (int idx = getAccessorIdx(c)+1) 895 return unsigned(idx-1) < NumElements; 896 return false; 897 } 898 virtual void getAsStringInternal(std::string &InnerString) const; 899 900 static bool classof(const Type *T) { 901 return T->getTypeClass() == ExtVector; 902 } 903 static bool classof(const ExtVectorType *) { return true; } 904}; 905 906/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 907/// class of FunctionTypeNoProto and FunctionTypeProto. 908/// 909class FunctionType : public Type { 910 /// SubClassData - This field is owned by the subclass, put here to pack 911 /// tightly with the ivars in Type. 912 bool SubClassData : 1; 913 914 /// TypeQuals - Used only by FunctionTypeProto, put here to pack with the 915 /// other bitfields. 916 /// The qualifiers are part of FunctionTypeProto because... 917 /// 918 /// C++ 8.3.5p4: The return type, the parameter type list and the 919 /// cv-qualifier-seq, [...], are part of the function type. 920 /// 921 unsigned TypeQuals : 3; 922 923 // The type returned by the function. 924 QualType ResultType; 925protected: 926 FunctionType(TypeClass tc, QualType res, bool SubclassInfo, 927 unsigned typeQuals, QualType Canonical) 928 : Type(tc, Canonical), 929 SubClassData(SubclassInfo), TypeQuals(typeQuals), ResultType(res) {} 930 bool getSubClassData() const { return SubClassData; } 931 unsigned getTypeQuals() const { return TypeQuals; } 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, 0, 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, unsigned typeQuals, QualType Canonical) 979 : FunctionType(FunctionProto, Result, isVariadic, typeQuals, 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 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 1005 1006 typedef const QualType *arg_type_iterator; 1007 arg_type_iterator arg_type_begin() const { 1008 return reinterpret_cast<const QualType *>(this+1); 1009 } 1010 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 1011 1012 virtual void getAsStringInternal(std::string &InnerString) const; 1013 1014 static bool classof(const Type *T) { 1015 return T->getTypeClass() == FunctionProto; 1016 } 1017 static bool classof(const FunctionTypeProto *) { return true; } 1018 1019 void Profile(llvm::FoldingSetNodeID &ID); 1020 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 1021 arg_type_iterator ArgTys, unsigned NumArgs, 1022 bool isVariadic, unsigned TypeQuals); 1023 1024protected: 1025 virtual void EmitImpl(llvm::Serializer& S) const; 1026 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 1027 friend class Type; 1028}; 1029 1030 1031class TypedefType : public Type { 1032 TypedefDecl *Decl; 1033protected: 1034 TypedefType(TypeClass tc, TypedefDecl *D, QualType can) 1035 : Type(tc, can), Decl(D) { 1036 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1037 } 1038 friend class ASTContext; // ASTContext creates these. 1039public: 1040 1041 TypedefDecl *getDecl() const { return Decl; } 1042 1043 /// LookThroughTypedefs - Return the ultimate type this typedef corresponds to 1044 /// potentially looking through *all* consequtive typedefs. This returns the 1045 /// sum of the type qualifiers, so if you have: 1046 /// typedef const int A; 1047 /// typedef volatile A B; 1048 /// looking through the typedefs for B will give you "const volatile A". 1049 QualType LookThroughTypedefs() const; 1050 1051 virtual void getAsStringInternal(std::string &InnerString) const; 1052 1053 static bool classof(const Type *T) { return T->getTypeClass() == TypeName; } 1054 static bool classof(const TypedefType *) { return true; } 1055 1056protected: 1057 virtual void EmitImpl(llvm::Serializer& S) const; 1058 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 1059 friend class Type; 1060}; 1061 1062/// TypeOfExpr (GCC extension). 1063class TypeOfExpr : public Type { 1064 Expr *TOExpr; 1065 TypeOfExpr(Expr *E, QualType can) : Type(TypeOfExp, can), TOExpr(E) { 1066 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1067 } 1068 friend class ASTContext; // ASTContext creates these. 1069public: 1070 Expr *getUnderlyingExpr() const { return TOExpr; } 1071 1072 virtual void getAsStringInternal(std::string &InnerString) const; 1073 1074 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExp; } 1075 static bool classof(const TypeOfExpr *) { return true; } 1076}; 1077 1078/// TypeOfType (GCC extension). 1079class TypeOfType : public Type { 1080 QualType TOType; 1081 TypeOfType(QualType T, QualType can) : Type(TypeOfTyp, can), TOType(T) { 1082 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1083 } 1084 friend class ASTContext; // ASTContext creates these. 1085public: 1086 QualType getUnderlyingType() const { return TOType; } 1087 1088 virtual void getAsStringInternal(std::string &InnerString) const; 1089 1090 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfTyp; } 1091 static bool classof(const TypeOfType *) { return true; } 1092}; 1093 1094class TagType : public Type { 1095 TagDecl *decl; 1096 friend class ASTContext; 1097 1098protected: 1099 TagType(TagDecl *D, QualType can) : Type(Tagged, can), decl(D) {} 1100 1101public: 1102 TagDecl *getDecl() const { return decl; } 1103 1104 virtual void getAsStringInternal(std::string &InnerString) const; 1105 1106 static bool classof(const Type *T) { return T->getTypeClass() == Tagged; } 1107 static bool classof(const TagType *) { return true; } 1108 1109protected: 1110 virtual void EmitImpl(llvm::Serializer& S) const; 1111 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 1112 friend class Type; 1113}; 1114 1115/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 1116/// to detect TagType objects of structs/unions/classes. 1117class RecordType : public TagType { 1118protected: 1119 explicit RecordType(RecordDecl *D) 1120 : TagType(reinterpret_cast<TagDecl*>(D), QualType()) { } 1121 friend class ASTContext; // ASTContext creates these. 1122public: 1123 1124 RecordDecl *getDecl() const { 1125 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 1126 } 1127 1128 // FIXME: This predicate is a helper to QualType/Type. It needs to 1129 // recursively check all fields for const-ness. If any field is declared 1130 // const, it needs to return false. 1131 bool hasConstFields() const { return false; } 1132 1133 // FIXME: RecordType needs to check when it is created that all fields are in 1134 // the same address space, and return that. 1135 unsigned getAddressSpace() const { return 0; } 1136 1137 static bool classof(const TagType *T); 1138 static bool classof(const Type *T) { 1139 return isa<TagType>(T) && classof(cast<TagType>(T)); 1140 } 1141 static bool classof(const RecordType *) { return true; } 1142}; 1143 1144/// CXXRecordType - This is a helper class that allows the use of 1145/// isa/cast/dyncast to detect TagType objects of C++ structs/unions/classes. 1146class CXXRecordType : public RecordType { 1147 explicit CXXRecordType(CXXRecordDecl *D) 1148 : RecordType(reinterpret_cast<RecordDecl*>(D)) { } 1149 friend class ASTContext; // ASTContext creates these. 1150public: 1151 1152 CXXRecordDecl *getDecl() const { 1153 return reinterpret_cast<CXXRecordDecl*>(RecordType::getDecl()); 1154 } 1155 1156 static bool classof(const TagType *T); 1157 static bool classof(const Type *T) { 1158 return isa<TagType>(T) && classof(cast<TagType>(T)); 1159 } 1160 static bool classof(const CXXRecordType *) { return true; } 1161}; 1162 1163/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 1164/// to detect TagType objects of enums. 1165class EnumType : public TagType { 1166 explicit EnumType(EnumDecl *D) 1167 : TagType(reinterpret_cast<TagDecl*>(D), QualType()) { } 1168 friend class ASTContext; // ASTContext creates these. 1169public: 1170 1171 EnumDecl *getDecl() const { 1172 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 1173 } 1174 1175 static bool classof(const TagType *T); 1176 static bool classof(const Type *T) { 1177 return isa<TagType>(T) && classof(cast<TagType>(T)); 1178 } 1179 static bool classof(const EnumType *) { return true; } 1180}; 1181 1182class TemplateTypeParmType : public Type { 1183 TemplateTypeParmDecl *Decl; 1184 1185protected: 1186 TemplateTypeParmType(TemplateTypeParmDecl *D) 1187 : Type(TemplateTypeParm, QualType(this, 0)), Decl(D) { } 1188 1189 friend class ASTContext; // ASTContext creates these 1190 1191public: 1192 TemplateTypeParmDecl *getDecl() const { return Decl; } 1193 1194 virtual void getAsStringInternal(std::string &InnerString) const; 1195 1196 static bool classof(const Type *T) { 1197 return T->getTypeClass() == TemplateTypeParm; 1198 } 1199 static bool classof(const TemplateTypeParmType *T) { return true; } 1200 1201protected: 1202 virtual void EmitImpl(llvm::Serializer& S) const; 1203 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 1204 friend class Type; 1205}; 1206 1207/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 1208/// object oriented design. They basically correspond to C++ classes. There 1209/// are two kinds of interface types, normal interfaces like "NSString" and 1210/// qualified interfaces, which are qualified with a protocol list like 1211/// "NSString<NSCopyable, NSAmazing>". Qualified interface types are instances 1212/// of ObjCQualifiedInterfaceType, which is a subclass of ObjCInterfaceType. 1213class ObjCInterfaceType : public Type { 1214 ObjCInterfaceDecl *Decl; 1215protected: 1216 ObjCInterfaceType(TypeClass tc, ObjCInterfaceDecl *D) : 1217 Type(tc, QualType()), Decl(D) { } 1218 friend class ASTContext; // ASTContext creates these. 1219public: 1220 1221 ObjCInterfaceDecl *getDecl() const { return Decl; } 1222 1223 /// qual_iterator and friends: this provides access to the (potentially empty) 1224 /// list of protocols qualifying this interface. If this is an instance of 1225 /// ObjCQualifiedInterfaceType it returns the list, otherwise it returns an 1226 /// empty list if there are no qualifying protocols. 1227 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 1228 inline qual_iterator qual_begin() const; 1229 inline qual_iterator qual_end() const; 1230 bool qual_empty() const { return getTypeClass() != ObjCQualifiedInterface; } 1231 1232 /// getNumProtocols - Return the number of qualifying protocols in this 1233 /// interface type, or 0 if there are none. 1234 inline unsigned getNumProtocols() const; 1235 1236 /// getProtocol - Return the specified qualifying protocol. 1237 inline ObjCProtocolDecl *getProtocol(unsigned i) const; 1238 1239 1240 virtual void getAsStringInternal(std::string &InnerString) const; 1241 static bool classof(const Type *T) { 1242 return T->getTypeClass() == ObjCInterface || 1243 T->getTypeClass() == ObjCQualifiedInterface; 1244 } 1245 static bool classof(const ObjCInterfaceType *) { return true; } 1246}; 1247 1248/// ObjCQualifiedInterfaceType - This class represents interface types 1249/// conforming to a list of protocols, such as INTF<Proto1, Proto2, Proto1>. 1250/// 1251/// Duplicate protocols are removed and protocol list is canonicalized to be in 1252/// alphabetical order. 1253class ObjCQualifiedInterfaceType : public ObjCInterfaceType, 1254 public llvm::FoldingSetNode { 1255 1256 // List of protocols for this protocol conforming object type 1257 // List is sorted on protocol name. No protocol is enterred more than once. 1258 llvm::SmallVector<ObjCProtocolDecl*, 4> Protocols; 1259 1260 ObjCQualifiedInterfaceType(ObjCInterfaceDecl *D, 1261 ObjCProtocolDecl **Protos, unsigned NumP) : 1262 ObjCInterfaceType(ObjCQualifiedInterface, D), 1263 Protocols(Protos, Protos+NumP) { } 1264 friend class ASTContext; // ASTContext creates these. 1265public: 1266 1267 ObjCProtocolDecl *getProtocol(unsigned i) const { 1268 return Protocols[i]; 1269 } 1270 unsigned getNumProtocols() const { 1271 return Protocols.size(); 1272 } 1273 1274 qual_iterator qual_begin() const { return Protocols.begin(); } 1275 qual_iterator qual_end() const { return Protocols.end(); } 1276 1277 virtual void getAsStringInternal(std::string &InnerString) const; 1278 1279 void Profile(llvm::FoldingSetNodeID &ID); 1280 static void Profile(llvm::FoldingSetNodeID &ID, 1281 const ObjCInterfaceDecl *Decl, 1282 ObjCProtocolDecl **protocols, unsigned NumProtocols); 1283 1284 static bool classof(const Type *T) { 1285 return T->getTypeClass() == ObjCQualifiedInterface; 1286 } 1287 static bool classof(const ObjCQualifiedInterfaceType *) { return true; } 1288}; 1289 1290inline ObjCInterfaceType::qual_iterator ObjCInterfaceType::qual_begin() const { 1291 if (const ObjCQualifiedInterfaceType *QIT = 1292 dyn_cast<ObjCQualifiedInterfaceType>(this)) 1293 return QIT->qual_begin(); 1294 return 0; 1295} 1296inline ObjCInterfaceType::qual_iterator ObjCInterfaceType::qual_end() const { 1297 if (const ObjCQualifiedInterfaceType *QIT = 1298 dyn_cast<ObjCQualifiedInterfaceType>(this)) 1299 return QIT->qual_end(); 1300 return 0; 1301} 1302 1303/// getNumProtocols - Return the number of qualifying protocols in this 1304/// interface type, or 0 if there are none. 1305inline unsigned ObjCInterfaceType::getNumProtocols() const { 1306 if (const ObjCQualifiedInterfaceType *QIT = 1307 dyn_cast<ObjCQualifiedInterfaceType>(this)) 1308 return QIT->getNumProtocols(); 1309 return 0; 1310} 1311 1312/// getProtocol - Return the specified qualifying protocol. 1313inline ObjCProtocolDecl *ObjCInterfaceType::getProtocol(unsigned i) const { 1314 return cast<ObjCQualifiedInterfaceType>(this)->getProtocol(i); 1315} 1316 1317 1318 1319/// ObjCQualifiedIdType - to represent id<protocol-list>. 1320/// 1321/// Duplicate protocols are removed and protocol list is canonicalized to be in 1322/// alphabetical order. 1323class ObjCQualifiedIdType : public Type, 1324 public llvm::FoldingSetNode { 1325 // List of protocols for this protocol conforming 'id' type 1326 // List is sorted on protocol name. No protocol is enterred more than once. 1327 llvm::SmallVector<ObjCProtocolDecl*, 8> Protocols; 1328 1329 ObjCQualifiedIdType(ObjCProtocolDecl **Protos, unsigned NumP) 1330 : Type(ObjCQualifiedId, QualType()/*these are always canonical*/), 1331 Protocols(Protos, Protos+NumP) { } 1332 friend class ASTContext; // ASTContext creates these. 1333public: 1334 1335 ObjCProtocolDecl *getProtocols(unsigned i) const { 1336 return Protocols[i]; 1337 } 1338 unsigned getNumProtocols() const { 1339 return Protocols.size(); 1340 } 1341 ObjCProtocolDecl **getReferencedProtocols() { 1342 return &Protocols[0]; 1343 } 1344 1345 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 1346 qual_iterator qual_begin() const { return Protocols.begin(); } 1347 qual_iterator qual_end() const { return Protocols.end(); } 1348 1349 virtual void getAsStringInternal(std::string &InnerString) const; 1350 1351 void Profile(llvm::FoldingSetNodeID &ID); 1352 static void Profile(llvm::FoldingSetNodeID &ID, 1353 ObjCProtocolDecl **protocols, unsigned NumProtocols); 1354 1355 static bool classof(const Type *T) { 1356 return T->getTypeClass() == ObjCQualifiedId; 1357 } 1358 static bool classof(const ObjCQualifiedIdType *) { return true; } 1359 1360}; 1361 1362 1363// Inline function definitions. 1364 1365/// getUnqualifiedType - Return the type without any qualifiers. 1366inline QualType QualType::getUnqualifiedType() const { 1367 Type *TP = getTypePtr(); 1368 if (const ASQualType *ASQT = dyn_cast<ASQualType>(TP)) 1369 TP = ASQT->getBaseType(); 1370 return QualType(TP, 0); 1371} 1372 1373/// getAddressSpace - Return the address space of this type. 1374inline unsigned QualType::getAddressSpace() const { 1375 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 1376 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 1377 return AT->getElementType().getAddressSpace(); 1378 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 1379 return RT->getAddressSpace(); 1380 if (const ASQualType *ASQT = dyn_cast<ASQualType>(CT)) 1381 return ASQT->getAddressSpace(); 1382 return 0; 1383} 1384 1385/// isMoreQualifiedThan - Determine whether this type is more 1386/// qualified than the Other type. For example, "const volatile int" 1387/// is more qualified than "const int", "volatile int", and 1388/// "int". However, it is not more qualified than "const volatile 1389/// int". 1390inline bool QualType::isMoreQualifiedThan(QualType Other) const { 1391 // FIXME: Handle address spaces 1392 unsigned MyQuals = this->getCVRQualifiers(); 1393 unsigned OtherQuals = Other.getCVRQualifiers(); 1394 assert(this->getAddressSpace() == 0 && "Address space not checked"); 1395 assert(Other.getAddressSpace() == 0 && "Address space not checked"); 1396 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 1397} 1398 1399/// isAtLeastAsQualifiedAs - Determine whether this type is at last 1400/// as qualified as the Other type. For example, "const volatile 1401/// int" is at least as qualified as "const int", "volatile int", 1402/// "int", and "const volatile int". 1403inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 1404 // FIXME: Handle address spaces 1405 unsigned MyQuals = this->getCVRQualifiers(); 1406 unsigned OtherQuals = Other.getCVRQualifiers(); 1407 assert(this->getAddressSpace() == 0 && "Address space not checked"); 1408 assert(Other.getAddressSpace() == 0 && "Address space not checked"); 1409 return (MyQuals | OtherQuals) == MyQuals; 1410} 1411 1412/// getNonReferenceType - If Type is a reference type (e.g., const 1413/// int&), returns the type that the reference refers to ("const 1414/// int"). Otherwise, returns the type itself. This routine is used 1415/// throughout Sema to implement C++ 5p6: 1416/// 1417/// If an expression initially has the type "reference to T" (8.3.2, 1418/// 8.5.3), the type is adjusted to "T" prior to any further 1419/// analysis, the expression designates the object or function 1420/// denoted by the reference, and the expression is an lvalue. 1421inline QualType QualType::getNonReferenceType() const { 1422 if (const ReferenceType *RefType = (*this)->getAsReferenceType()) 1423 return RefType->getPointeeType(); 1424 else 1425 return *this; 1426} 1427 1428inline const TypedefType* Type::getAsTypedefType() const { 1429 return dyn_cast<TypedefType>(this); 1430} 1431inline const ObjCInterfaceType *Type::getAsPointerToObjCInterfaceType() const { 1432 if (const PointerType *PT = getAsPointerType()) 1433 return PT->getPointeeType()->getAsObjCInterfaceType(); 1434 return 0; 1435} 1436 1437// NOTE: All of these methods use "getUnqualifiedType" to strip off address 1438// space qualifiers if present. 1439inline bool Type::isFunctionType() const { 1440 return isa<FunctionType>(CanonicalType.getUnqualifiedType()); 1441} 1442inline bool Type::isPointerType() const { 1443 return isa<PointerType>(CanonicalType.getUnqualifiedType()); 1444} 1445inline bool Type::isBlockPointerType() const { 1446 return isa<BlockPointerType>(CanonicalType); 1447} 1448inline bool Type::isReferenceType() const { 1449 return isa<ReferenceType>(CanonicalType.getUnqualifiedType()); 1450} 1451inline bool Type::isPointerLikeType() const { 1452 return isa<PointerLikeType>(CanonicalType.getUnqualifiedType()); 1453} 1454inline bool Type::isFunctionPointerType() const { 1455 if (const PointerType* T = getAsPointerType()) 1456 return T->getPointeeType()->isFunctionType(); 1457 else 1458 return false; 1459} 1460inline bool Type::isArrayType() const { 1461 return isa<ArrayType>(CanonicalType.getUnqualifiedType()); 1462} 1463inline bool Type::isConstantArrayType() const { 1464 return isa<ConstantArrayType>(CanonicalType.getUnqualifiedType()); 1465} 1466inline bool Type::isIncompleteArrayType() const { 1467 return isa<IncompleteArrayType>(CanonicalType.getUnqualifiedType()); 1468} 1469inline bool Type::isVariableArrayType() const { 1470 return isa<VariableArrayType>(CanonicalType.getUnqualifiedType()); 1471} 1472inline bool Type::isRecordType() const { 1473 return isa<RecordType>(CanonicalType.getUnqualifiedType()); 1474} 1475inline bool Type::isAnyComplexType() const { 1476 return isa<ComplexType>(CanonicalType.getUnqualifiedType()); 1477} 1478inline bool Type::isVectorType() const { 1479 return isa<VectorType>(CanonicalType.getUnqualifiedType()); 1480} 1481inline bool Type::isExtVectorType() const { 1482 return isa<ExtVectorType>(CanonicalType.getUnqualifiedType()); 1483} 1484inline bool Type::isObjCInterfaceType() const { 1485 return isa<ObjCInterfaceType>(CanonicalType.getUnqualifiedType()); 1486} 1487inline bool Type::isObjCQualifiedInterfaceType() const { 1488 return isa<ObjCQualifiedInterfaceType>(CanonicalType.getUnqualifiedType()); 1489} 1490inline bool Type::isObjCQualifiedIdType() const { 1491 return isa<ObjCQualifiedIdType>(CanonicalType.getUnqualifiedType()); 1492} 1493inline bool Type::isTemplateTypeParmType() const { 1494 return isa<TemplateTypeParmType>(CanonicalType.getUnqualifiedType()); 1495} 1496 1497inline bool Type::isOverloadType() const { 1498 if (const BuiltinType *BT = getAsBuiltinType()) 1499 return BT->getKind() == BuiltinType::Overload; 1500 else 1501 return false; 1502} 1503 1504/// Insertion operator for diagnostics. This allows sending QualType's into a 1505/// diagnostic with <<. 1506inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 1507 QualType T) { 1508 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 1509 Diagnostic::ak_qualtype); 1510 return DB; 1511} 1512 1513} // end namespace clang 1514 1515#endif 1516