Type.h revision da5c087ebf3d47b40bae2e99671ce1929156a427
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/FoldingSet.h" 20#include "llvm/ADT/APSInt.h" 21#include "llvm/Bitcode/SerializationFwd.h" 22using llvm::isa; 23using llvm::cast; 24using llvm::cast_or_null; 25using llvm::dyn_cast; 26using llvm::dyn_cast_or_null; 27 28namespace clang { 29 class ASTContext; 30 class Type; 31 class TypedefDecl; 32 class TagDecl; 33 class RecordDecl; 34 class CXXRecordDecl; 35 class EnumDecl; 36 class FieldDecl; 37 class ObjCInterfaceDecl; 38 class ObjCProtocolDecl; 39 class ObjCMethodDecl; 40 class Expr; 41 class Stmt; 42 class SourceLocation; 43 class PointerLikeType; 44 class PointerType; 45 class BlockPointerType; 46 class ReferenceType; 47 class VectorType; 48 class ArrayType; 49 class ConstantArrayType; 50 class VariableArrayType; 51 class IncompleteArrayType; 52 class RecordType; 53 class EnumType; 54 class ComplexType; 55 class TagType; 56 class TypedefType; 57 class FunctionType; 58 class FunctionTypeProto; 59 class ExtVectorType; 60 class BuiltinType; 61 class ObjCInterfaceType; 62 class ObjCQualifiedIdType; 63 class ObjCQualifiedInterfaceType; 64 class StmtIteratorBase; 65 66/// QualType - For efficiency, we don't store CVR-qualified types as nodes on 67/// their own: instead each reference to a type stores the qualifiers. This 68/// greatly reduces the number of nodes we need to allocate for types (for 69/// example we only need one for 'int', 'const int', 'volatile int', 70/// 'const volatile int', etc). 71/// 72/// As an added efficiency bonus, instead of making this a pair, we just store 73/// the three bits we care about in the low bits of the pointer. To handle the 74/// packing/unpacking, we make QualType be a simple wrapper class that acts like 75/// a smart pointer. 76class QualType { 77 uintptr_t ThePtr; 78public: 79 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 80 Const = 0x1, 81 Restrict = 0x2, 82 Volatile = 0x4, 83 CVRFlags = Const|Restrict|Volatile 84 }; 85 86 QualType() : ThePtr(0) {} 87 88 QualType(Type *Ptr, unsigned Quals) { 89 assert((Quals & ~CVRFlags) == 0 && "Invalid type qualifiers!"); 90 ThePtr = reinterpret_cast<uintptr_t>(Ptr); 91 assert((ThePtr & CVRFlags) == 0 && "Type pointer not 8-byte aligned?"); 92 ThePtr |= Quals; 93 } 94 95 QualType(const Type *Ptr, unsigned Quals) { 96 assert((Quals & ~CVRFlags) == 0 && "Invalid type qualifiers!"); 97 ThePtr = reinterpret_cast<uintptr_t>(Ptr); 98 assert((ThePtr & CVRFlags) == 0 && "Type pointer not 8-byte aligned?"); 99 ThePtr |= Quals; 100 } 101 102 static QualType getFromOpaquePtr(void *Ptr) { 103 QualType T; 104 T.ThePtr = reinterpret_cast<uintptr_t>(Ptr); 105 return T; 106 } 107 108 unsigned getCVRQualifiers() const { 109 return ThePtr & CVRFlags; 110 } 111 Type *getTypePtr() const { 112 return reinterpret_cast<Type*>(ThePtr & ~CVRFlags); 113 } 114 115 void *getAsOpaquePtr() const { 116 return reinterpret_cast<void*>(ThePtr); 117 } 118 119 Type &operator*() const { 120 return *getTypePtr(); 121 } 122 123 Type *operator->() const { 124 return getTypePtr(); 125 } 126 127 /// isNull - Return true if this QualType doesn't point to a type yet. 128 bool isNull() const { 129 return ThePtr == 0; 130 } 131 132 bool isConstQualified() const { 133 return (ThePtr & Const) ? true : false; 134 } 135 bool isVolatileQualified() const { 136 return (ThePtr & Volatile) ? true : false; 137 } 138 bool isRestrictQualified() const { 139 return (ThePtr & Restrict) ? true : false; 140 } 141 142 bool isConstant(ASTContext& Ctx) const; 143 144 /// addConst/addVolatile/addRestrict - add the specified type qual to this 145 /// QualType. 146 void addConst() { ThePtr |= Const; } 147 void addVolatile() { ThePtr |= Volatile; } 148 void addRestrict() { ThePtr |= Restrict; } 149 150 void removeConst() { ThePtr &= ~Const; } 151 void removeVolatile() { ThePtr &= ~Volatile; } 152 void removeRestrict() { ThePtr &= ~Restrict; } 153 154 QualType getQualifiedType(unsigned TQs) const { 155 return QualType(getTypePtr(), TQs); 156 } 157 QualType getWithAdditionalQualifiers(unsigned TQs) const { 158 return QualType(getTypePtr(), TQs|getCVRQualifiers()); 159 } 160 161 QualType withConst() const { return getWithAdditionalQualifiers(Const); } 162 QualType withVolatile() const { return getWithAdditionalQualifiers(Volatile);} 163 QualType withRestrict() const { return getWithAdditionalQualifiers(Restrict);} 164 165 QualType getUnqualifiedType() const; 166 bool isMoreQualifiedThan(QualType Other) const; 167 bool isAtLeastAsQualifiedAs(QualType Other) const; 168 QualType getNonReferenceType() const; 169 170 171 /// operator==/!= - Indicate whether the specified types and qualifiers are 172 /// identical. 173 bool operator==(const QualType &RHS) const { 174 return ThePtr == RHS.ThePtr; 175 } 176 bool operator!=(const QualType &RHS) const { 177 return ThePtr != RHS.ThePtr; 178 } 179 std::string getAsString() const { 180 std::string S; 181 getAsStringInternal(S); 182 return S; 183 } 184 void getAsStringInternal(std::string &Str) const; 185 186 void dump(const char *s) const; 187 void dump() const; 188 189 void Profile(llvm::FoldingSetNodeID &ID) const { 190 ID.AddPointer(getAsOpaquePtr()); 191 } 192 193public: 194 195 /// getAddressSpace - Return the address space of this type. 196 inline unsigned getAddressSpace() const; 197 198 /// Emit - Serialize a QualType to Bitcode. 199 void Emit(llvm::Serializer& S) const; 200 201 /// Read - Deserialize a QualType from Bitcode. 202 static QualType ReadVal(llvm::Deserializer& D); 203 204 void ReadBackpatch(llvm::Deserializer& D); 205}; 206 207} // end clang. 208 209namespace llvm { 210/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 211/// to a specific Type class. 212template<> struct simplify_type<const ::clang::QualType> { 213 typedef ::clang::Type* SimpleType; 214 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 215 return Val.getTypePtr(); 216 } 217}; 218template<> struct simplify_type< ::clang::QualType> 219 : public simplify_type<const ::clang::QualType> {}; 220 221} // end namespace llvm 222 223namespace clang { 224 225/// Type - This is the base class of the type hierarchy. A central concept 226/// with types is that each type always has a canonical type. A canonical type 227/// is the type with any typedef names stripped out of it or the types it 228/// references. For example, consider: 229/// 230/// typedef int foo; 231/// typedef foo* bar; 232/// 'int *' 'foo *' 'bar' 233/// 234/// There will be a Type object created for 'int'. Since int is canonical, its 235/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 236/// TypeNameType). Its CanonicalType pointer points to the 'int' Type. Next 237/// there is a PointerType that represents 'int*', which, like 'int', is 238/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 239/// type is 'int*', and there is a TypeNameType for 'bar', whose canonical type 240/// is also 'int*'. 241/// 242/// Non-canonical types are useful for emitting diagnostics, without losing 243/// information about typedefs being used. Canonical types are useful for type 244/// comparisons (they allow by-pointer equality tests) and useful for reasoning 245/// about whether something has a particular form (e.g. is a function type), 246/// because they implicitly, recursively, strip all typedefs out of a type. 247/// 248/// Types, once created, are immutable. 249/// 250class Type { 251public: 252 enum TypeClass { 253 Builtin, Complex, Pointer, Reference, 254 ConstantArray, VariableArray, IncompleteArray, 255 Vector, ExtVector, 256 FunctionNoProto, FunctionProto, 257 TypeName, Tagged, ASQual, 258 ObjCInterface, ObjCQualifiedInterface, 259 ObjCQualifiedId, 260 TypeOfExp, TypeOfTyp, // GNU typeof extension. 261 BlockPointer // C extension 262 }; 263private: 264 QualType CanonicalType; 265 266 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 267 /// Note that this should stay at the end of the ivars for Type so that 268 /// subclasses can pack their bitfields into the same word. 269 unsigned TC : 5; 270protected: 271 // silence VC++ warning C4355: 'this' : used in base member initializer list 272 Type *this_() { return this; } 273 Type(TypeClass tc, QualType Canonical) 274 : CanonicalType(Canonical.isNull() ? QualType(this_(), 0) : Canonical), 275 TC(tc) {} 276 virtual ~Type() {}; 277 virtual void Destroy(ASTContext& C); 278 friend class ASTContext; 279 280 void EmitTypeInternal(llvm::Serializer& S) const; 281 void ReadTypeInternal(llvm::Deserializer& D); 282 283public: 284 TypeClass getTypeClass() const { return static_cast<TypeClass>(TC); } 285 286 bool isCanonical() const { return CanonicalType.getTypePtr() == this; } 287 288 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 289 /// object types, function types, and incomplete types. 290 291 /// isObjectType - types that fully describe objects. An object is a region 292 /// of memory that can be examined and stored into (H&S). 293 bool isObjectType() const; 294 295 /// isIncompleteType - Return true if this is an incomplete type. 296 /// A type that can describe objects, but which lacks information needed to 297 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 298 /// routine will need to determine if the size is actually required. 299 bool isIncompleteType() const; 300 301 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 302 /// type, in other words, not a function type. 303 bool isIncompleteOrObjectType() const { 304 return !isFunctionType(); 305 } 306 307 /// isVariablyModifiedType (C99 6.7.5.2p2) - Return true for variable array 308 /// types that have a non-constant expression. This does not include "[]". 309 bool isVariablyModifiedType() const; 310 311 /// Helper methods to distinguish type categories. All type predicates 312 /// operate on the canonical type, ignoring typedefs and qualifiers. 313 314 /// isIntegerType() does *not* include complex integers (a GCC extension). 315 /// isComplexIntegerType() can be used to test for complex integers. 316 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 317 bool isEnumeralType() const; 318 bool isBooleanType() const; 319 bool isCharType() const; 320 bool isWideCharType() const; 321 bool isIntegralType() const; 322 323 /// Floating point categories. 324 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 325 /// isComplexType() does *not* include complex integers (a GCC extension). 326 /// isComplexIntegerType() can be used to test for complex integers. 327 bool isComplexType() const; // C99 6.2.5p11 (complex) 328 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 329 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 330 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 331 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 332 bool isVoidType() const; // C99 6.2.5p19 333 bool isDerivedType() const; // C99 6.2.5p20 334 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 335 bool isAggregateType() const; // C99 6.2.5p21 (arrays, structures) 336 337 // Type Predicates: Check to see if this type is structurally the specified 338 // type, ignoring typedefs and qualifiers. 339 bool isFunctionType() const; 340 bool isPointerLikeType() const; // Pointer or Reference. 341 bool isPointerType() const; 342 bool isBlockPointerType() const; 343 bool isReferenceType() const; 344 bool isFunctionPointerType() const; 345 bool isArrayType() const; 346 bool isConstantArrayType() const; 347 bool isIncompleteArrayType() const; 348 bool isVariableArrayType() const; 349 bool isRecordType() const; 350 bool isClassType() const; 351 bool isStructureType() const; 352 bool isUnionType() const; 353 bool isComplexIntegerType() const; // GCC _Complex integer type. 354 bool isVectorType() const; // GCC vector type. 355 bool isExtVectorType() const; // Extended vector type. 356 bool isObjCInterfaceType() const; // NSString or NSString<foo> 357 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 358 bool isObjCQualifiedIdType() const; // id<foo> 359 bool isOverloadType() const; // C++ overloaded function 360 361 // Type Checking Functions: Check to see if this type is structurally the 362 // specified type, ignoring typedefs and qualifiers, and return a pointer to 363 // the best type we can. 364 const BuiltinType *getAsBuiltinType() const; 365 const FunctionType *getAsFunctionType() const; 366 const FunctionTypeProto *getAsFunctionTypeProto() const; 367 const PointerLikeType *getAsPointerLikeType() const; // Pointer or Reference. 368 const PointerType *getAsPointerType() const; 369 const BlockPointerType *getAsBlockPointerType() const; 370 const ReferenceType *getAsReferenceType() const; 371 const RecordType *getAsRecordType() const; 372 const RecordType *getAsStructureType() const; 373 /// NOTE: getAsArrayType* are methods on ASTContext. 374 const TypedefType *getAsTypedefType() const; 375 const RecordType *getAsUnionType() const; 376 const EnumType *getAsEnumType() const; 377 const VectorType *getAsVectorType() const; // GCC vector type. 378 const ComplexType *getAsComplexType() const; 379 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 380 const ExtVectorType *getAsExtVectorType() const; // Extended vector type. 381 const ObjCInterfaceType *getAsObjCInterfaceType() const; 382 const ObjCQualifiedInterfaceType *getAsObjCQualifiedInterfaceType() const; 383 const ObjCQualifiedIdType *getAsObjCQualifiedIdType() const; 384 385 /// getAsPointerToObjCInterfaceType - If this is a pointer to an ObjC 386 /// interface, return the interface type, otherwise return null. 387 const ObjCInterfaceType *getAsPointerToObjCInterfaceType() const; 388 389 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 390 /// element type of the array, potentially with type qualifiers missing. 391 /// This method should never be used when type qualifiers are meaningful. 392 const Type *getArrayElementTypeNoTypeQual() const; 393 394 395 396 /// getDesugaredType - Return the specified type with any "sugar" removed from 397 /// the type. This takes off typedefs, typeof's etc. If the outer level of 398 /// the type is already concrete, it returns it unmodified. This is similar 399 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 400 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 401 /// concrete. 402 QualType getDesugaredType() const; 403 404 /// More type predicates useful for type checking/promotion 405 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 406 407 /// isSignedIntegerType - Return true if this is an integer type that is 408 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 409 /// an enum decl which has a signed representation, or a vector of signed 410 /// integer element type. 411 bool isSignedIntegerType() const; 412 413 /// isUnsignedIntegerType - Return true if this is an integer type that is 414 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 415 /// decl which has an unsigned representation, or a vector of unsigned integer 416 /// element type. 417 bool isUnsignedIntegerType() const; 418 419 /// isConstantSizeType - Return true if this is not a variable sized type, 420 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 421 /// incomplete types. 422 bool isConstantSizeType() const; 423 424 QualType getCanonicalTypeInternal() const { return CanonicalType; } 425 void dump() const; 426 virtual void getAsStringInternal(std::string &InnerString) const = 0; 427 static bool classof(const Type *) { return true; } 428 429protected: 430 /// Emit - Emit a Type to bitcode. Used by ASTContext. 431 void Emit(llvm::Serializer& S) const; 432 433 /// Create - Construct a Type from bitcode. Used by ASTContext. 434 static void Create(ASTContext& Context, unsigned i, llvm::Deserializer& S); 435 436 /// EmitImpl - Subclasses must implement this method in order to 437 /// be serialized. 438 // FIXME: Make this abstract once implemented. 439 virtual void EmitImpl(llvm::Serializer& S) const { 440 assert (false && "Serializization for type not supported."); 441 } 442}; 443 444/// ASQualType - TR18037 (C embedded extensions) 6.2.5p26 445/// This supports address space qualified types. 446/// 447class ASQualType : public Type, public llvm::FoldingSetNode { 448 /// BaseType - This is the underlying type that this qualifies. All CVR 449 /// qualifiers are stored on the QualType that references this type, so we 450 /// can't have any here. 451 Type *BaseType; 452 /// Address Space ID - The address space ID this type is qualified with. 453 unsigned AddressSpace; 454 ASQualType(Type *Base, QualType CanonicalPtr, unsigned AddrSpace) : 455 Type(ASQual, CanonicalPtr), BaseType(Base), AddressSpace(AddrSpace) { 456 } 457 friend class ASTContext; // ASTContext creates these. 458public: 459 Type *getBaseType() const { return BaseType; } 460 unsigned getAddressSpace() const { return AddressSpace; } 461 462 virtual void getAsStringInternal(std::string &InnerString) const; 463 464 void Profile(llvm::FoldingSetNodeID &ID) { 465 Profile(ID, getBaseType(), AddressSpace); 466 } 467 static void Profile(llvm::FoldingSetNodeID &ID, Type *Base, 468 unsigned AddrSpace) { 469 ID.AddPointer(Base); 470 ID.AddInteger(AddrSpace); 471 } 472 473 static bool classof(const Type *T) { return T->getTypeClass() == ASQual; } 474 static bool classof(const ASQualType *) { return true; } 475 476protected: 477 virtual void EmitImpl(llvm::Serializer& S) const; 478 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 479 friend class Type; 480}; 481 482 483/// BuiltinType - This class is used for builtin types like 'int'. Builtin 484/// types are always canonical and have a literal name field. 485class BuiltinType : public Type { 486public: 487 enum Kind { 488 Void, 489 490 Bool, // This is bool and/or _Bool. 491 Char_U, // This is 'char' for targets where char is unsigned. 492 UChar, // This is explicitly qualified unsigned char. 493 UShort, 494 UInt, 495 ULong, 496 ULongLong, 497 498 Char_S, // This is 'char' for targets where char is signed. 499 SChar, // This is explicitly qualified signed char. 500 WChar, // This is 'wchar_t' for C++. 501 Short, 502 Int, 503 Long, 504 LongLong, 505 506 Float, Double, LongDouble, 507 508 Overload // This represents the type of an overloaded function declaration. 509 }; 510private: 511 Kind TypeKind; 512public: 513 BuiltinType(Kind K) : Type(Builtin, QualType()), TypeKind(K) {} 514 515 Kind getKind() const { return TypeKind; } 516 const char *getName() const; 517 518 virtual void getAsStringInternal(std::string &InnerString) const; 519 520 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 521 static bool classof(const BuiltinType *) { return true; } 522}; 523 524/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 525/// types (_Complex float etc) as well as the GCC integer complex extensions. 526/// 527class ComplexType : public Type, public llvm::FoldingSetNode { 528 QualType ElementType; 529 ComplexType(QualType Element, QualType CanonicalPtr) : 530 Type(Complex, CanonicalPtr), ElementType(Element) { 531 } 532 friend class ASTContext; // ASTContext creates these. 533public: 534 QualType getElementType() const { return ElementType; } 535 536 virtual void getAsStringInternal(std::string &InnerString) const; 537 538 void Profile(llvm::FoldingSetNodeID &ID) { 539 Profile(ID, getElementType()); 540 } 541 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 542 ID.AddPointer(Element.getAsOpaquePtr()); 543 } 544 545 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 546 static bool classof(const ComplexType *) { return true; } 547 548protected: 549 virtual void EmitImpl(llvm::Serializer& S) const; 550 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 551 friend class Type; 552}; 553 554/// PointerLikeType - Common base class for pointers and references. 555/// FIXME: Add more documentation on this classes design point. For example, 556/// should BlockPointerType inherit from it? Is the concept of a PointerLikeType 557/// in the C++ standard? 558/// 559class PointerLikeType : public Type { 560 QualType PointeeType; 561protected: 562 PointerLikeType(TypeClass K, QualType Pointee, QualType CanonicalPtr) : 563 Type(K, CanonicalPtr), PointeeType(Pointee) { 564 } 565public: 566 567 QualType getPointeeType() const { return PointeeType; } 568 569 static bool classof(const Type *T) { 570 return T->getTypeClass() == Pointer || T->getTypeClass() == Reference; 571 } 572 static bool classof(const PointerLikeType *) { return true; } 573}; 574 575/// PointerType - C99 6.7.5.1 - Pointer Declarators. 576/// 577class PointerType : public PointerLikeType, public llvm::FoldingSetNode { 578 PointerType(QualType Pointee, QualType CanonicalPtr) : 579 PointerLikeType(Pointer, Pointee, CanonicalPtr) { 580 } 581 friend class ASTContext; // ASTContext creates these. 582public: 583 584 virtual void getAsStringInternal(std::string &InnerString) const; 585 586 void Profile(llvm::FoldingSetNodeID &ID) { 587 Profile(ID, getPointeeType()); 588 } 589 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 590 ID.AddPointer(Pointee.getAsOpaquePtr()); 591 } 592 593 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 594 static bool classof(const PointerType *) { return true; } 595 596protected: 597 virtual void EmitImpl(llvm::Serializer& S) const; 598 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 599 friend class Type; 600}; 601 602/// BlockPointerType - pointer to a block type. 603/// This type is to represent types syntactically represented as 604/// "void (^)(int)", etc. Pointee is required to always be a function type. 605/// FIXME: Should BlockPointerType inherit from PointerLikeType? It could 606/// simplfy some type checking code, however PointerLikeType doesn't appear 607/// to be used by the type checker. 608/// 609class BlockPointerType : public Type, public llvm::FoldingSetNode { 610 QualType PointeeType; // Block is some kind of pointer type 611 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 612 Type(BlockPointer, CanonicalCls), PointeeType(Pointee) { 613 } 614 friend class ASTContext; // ASTContext creates these. 615public: 616 617 // Get the pointee type. Pointee is required to always be a function type. 618 QualType getPointeeType() const { return PointeeType; } 619 620 virtual void getAsStringInternal(std::string &InnerString) const; 621 622 void Profile(llvm::FoldingSetNodeID &ID) { 623 Profile(ID, getPointeeType()); 624 } 625 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 626 ID.AddPointer(Pointee.getAsOpaquePtr()); 627 } 628 629 static bool classof(const Type *T) { 630 return T->getTypeClass() == BlockPointer; 631 } 632 static bool classof(const BlockPointerType *) { return true; } 633 634 protected: 635 virtual void EmitImpl(llvm::Serializer& S) const; 636 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 637 friend class Type; 638}; 639 640/// ReferenceType - C++ 8.3.2 - Reference Declarators. 641/// 642class ReferenceType : public PointerLikeType, public llvm::FoldingSetNode { 643 ReferenceType(QualType Referencee, QualType CanonicalRef) : 644 PointerLikeType(Reference, Referencee, CanonicalRef) { 645 } 646 friend class ASTContext; // ASTContext creates these. 647public: 648 virtual void getAsStringInternal(std::string &InnerString) const; 649 650 void Profile(llvm::FoldingSetNodeID &ID) { 651 Profile(ID, getPointeeType()); 652 } 653 static void Profile(llvm::FoldingSetNodeID &ID, QualType Referencee) { 654 ID.AddPointer(Referencee.getAsOpaquePtr()); 655 } 656 657 static bool classof(const Type *T) { return T->getTypeClass() == Reference; } 658 static bool classof(const ReferenceType *) { return true; } 659}; 660 661/// ArrayType - C99 6.7.5.2 - Array Declarators. 662/// 663class ArrayType : public Type, public llvm::FoldingSetNode { 664public: 665 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 666 /// an array with a static size (e.g. int X[static 4]), or with a star size 667 /// (e.g. int X[*]). 'static' is only allowed on function parameters. 668 enum ArraySizeModifier { 669 Normal, Static, Star 670 }; 671private: 672 /// ElementType - The element type of the array. 673 QualType ElementType; 674 675 // NOTE: VC++ treats enums as signed, avoid using the ArraySizeModifier enum 676 /// NOTE: These fields are packed into the bitfields space in the Type class. 677 unsigned SizeModifier : 2; 678 679 /// IndexTypeQuals - Capture qualifiers in declarations like: 680 /// 'int X[static restrict 4]'. For function parameters only. 681 unsigned IndexTypeQuals : 3; 682 683protected: 684 ArrayType(TypeClass tc, QualType et, QualType can, 685 ArraySizeModifier sm, unsigned tq) 686 : Type(tc, can), ElementType(et), SizeModifier(sm), IndexTypeQuals(tq) {} 687 friend class ASTContext; // ASTContext creates these. 688public: 689 QualType getElementType() const { return ElementType; } 690 ArraySizeModifier getSizeModifier() const { 691 return ArraySizeModifier(SizeModifier); 692 } 693 unsigned getIndexTypeQualifier() const { return IndexTypeQuals; } 694 695 static bool classof(const Type *T) { 696 return T->getTypeClass() == ConstantArray || 697 T->getTypeClass() == VariableArray || 698 T->getTypeClass() == IncompleteArray; 699 } 700 static bool classof(const ArrayType *) { return true; } 701}; 702 703/// ConstantArrayType - This class represents C arrays with a specified constant 704/// size. For example 'int A[100]' has ConstantArrayType where the element type 705/// is 'int' and the size is 100. 706class ConstantArrayType : public ArrayType { 707 llvm::APInt Size; // Allows us to unique the type. 708 709 ConstantArrayType(QualType et, QualType can, llvm::APInt sz, 710 ArraySizeModifier sm, unsigned tq) 711 : ArrayType(ConstantArray, et, can, sm, tq), Size(sz) {} 712 friend class ASTContext; // ASTContext creates these. 713public: 714 const llvm::APInt &getSize() const { return Size; } 715 virtual void getAsStringInternal(std::string &InnerString) const; 716 717 void Profile(llvm::FoldingSetNodeID &ID) { 718 Profile(ID, getElementType(), getSize()); 719 } 720 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 721 llvm::APInt ArraySize) { 722 ID.AddPointer(ET.getAsOpaquePtr()); 723 ID.AddInteger(ArraySize.getZExtValue()); 724 } 725 static bool classof(const Type *T) { 726 return T->getTypeClass() == ConstantArray; 727 } 728 static bool classof(const ConstantArrayType *) { return true; } 729 730protected: 731 virtual void EmitImpl(llvm::Serializer& S) const; 732 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 733 friend class Type; 734}; 735 736/// IncompleteArrayType - This class represents C arrays with an unspecified 737/// size. For example 'int A[]' has an IncompleteArrayType where the element 738/// type is 'int' and the size is unspecified. 739class IncompleteArrayType : public ArrayType { 740 IncompleteArrayType(QualType et, QualType can, 741 ArraySizeModifier sm, unsigned tq) 742 : ArrayType(IncompleteArray, et, can, sm, tq) {} 743 friend class ASTContext; // ASTContext creates these. 744public: 745 746 virtual void getAsStringInternal(std::string &InnerString) const; 747 748 static bool classof(const Type *T) { 749 return T->getTypeClass() == IncompleteArray; 750 } 751 static bool classof(const IncompleteArrayType *) { return true; } 752 753 friend class StmtIteratorBase; 754 755 void Profile(llvm::FoldingSetNodeID &ID) { 756 Profile(ID, getElementType()); 757 } 758 759 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET) { 760 ID.AddPointer(ET.getAsOpaquePtr()); 761 } 762 763protected: 764 virtual void EmitImpl(llvm::Serializer& S) const; 765 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 766 friend class Type; 767}; 768 769/// VariableArrayType - This class represents C arrays with a specified size 770/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 771/// Since the size expression is an arbitrary expression, we store it as such. 772/// 773/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 774/// should not be: two lexically equivalent variable array types could mean 775/// different things, for example, these variables do not have the same type 776/// dynamically: 777/// 778/// void foo(int x) { 779/// int Y[x]; 780/// ++x; 781/// int Z[x]; 782/// } 783/// 784class VariableArrayType : public ArrayType { 785 /// SizeExpr - An assignment expression. VLA's are only permitted within 786 /// a function block. 787 Stmt *SizeExpr; 788 789 VariableArrayType(QualType et, QualType can, Expr *e, 790 ArraySizeModifier sm, unsigned tq) 791 : ArrayType(VariableArray, et, can, sm, tq), SizeExpr((Stmt*) e) {} 792 friend class ASTContext; // ASTContext creates these. 793 virtual void Destroy(ASTContext& C); 794 795public: 796 Expr *getSizeExpr() const { 797 // We use C-style casts instead of cast<> here because we do not wish 798 // to have a dependency of Type.h on Stmt.h/Expr.h. 799 return (Expr*) SizeExpr; 800 } 801 802 virtual void getAsStringInternal(std::string &InnerString) const; 803 804 static bool classof(const Type *T) { 805 return T->getTypeClass() == VariableArray; 806 } 807 static bool classof(const VariableArrayType *) { return true; } 808 809 friend class StmtIteratorBase; 810 811 void Profile(llvm::FoldingSetNodeID &ID) { 812 assert (0 && "Cannnot unique VariableArrayTypes."); 813 } 814 815protected: 816 virtual void EmitImpl(llvm::Serializer& S) const; 817 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 818 friend class Type; 819}; 820 821/// VectorType - GCC generic vector type. This type is created using 822/// __attribute__((vector_size(n)), where "n" specifies the vector size in 823/// bytes. Since the constructor takes the number of vector elements, the 824/// client is responsible for converting the size into the number of elements. 825class VectorType : public Type, public llvm::FoldingSetNode { 826protected: 827 /// ElementType - The element type of the vector. 828 QualType ElementType; 829 830 /// NumElements - The number of elements in the vector. 831 unsigned NumElements; 832 833 VectorType(QualType vecType, unsigned nElements, QualType canonType) : 834 Type(Vector, canonType), ElementType(vecType), NumElements(nElements) {} 835 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 836 QualType canonType) : Type(tc, canonType), ElementType(vecType), 837 NumElements(nElements) {} 838 friend class ASTContext; // ASTContext creates these. 839public: 840 841 QualType getElementType() const { return ElementType; } 842 unsigned getNumElements() const { return NumElements; } 843 844 virtual void getAsStringInternal(std::string &InnerString) const; 845 846 void Profile(llvm::FoldingSetNodeID &ID) { 847 Profile(ID, getElementType(), getNumElements(), getTypeClass()); 848 } 849 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 850 unsigned NumElements, TypeClass TypeClass) { 851 ID.AddPointer(ElementType.getAsOpaquePtr()); 852 ID.AddInteger(NumElements); 853 ID.AddInteger(TypeClass); 854 } 855 static bool classof(const Type *T) { 856 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 857 } 858 static bool classof(const VectorType *) { return true; } 859}; 860 861/// ExtVectorType - Extended vector type. This type is created using 862/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 863/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 864/// class enables syntactic extensions, like Vector Components for accessing 865/// points, colors, and textures (modeled after OpenGL Shading Language). 866class ExtVectorType : public VectorType { 867 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 868 VectorType(ExtVector, vecType, nElements, canonType) {} 869 friend class ASTContext; // ASTContext creates these. 870public: 871 static int getPointAccessorIdx(char c) { 872 switch (c) { 873 default: return -1; 874 case 'x': return 0; 875 case 'y': return 1; 876 case 'z': return 2; 877 case 'w': return 3; 878 } 879 } 880 static int getColorAccessorIdx(char c) { 881 switch (c) { 882 default: return -1; 883 case 'r': return 0; 884 case 'g': return 1; 885 case 'b': return 2; 886 case 'a': return 3; 887 } 888 } 889 static int getTextureAccessorIdx(char c) { 890 switch (c) { 891 default: return -1; 892 case 's': return 0; 893 case 't': return 1; 894 case 'p': return 2; 895 case 'q': return 3; 896 } 897 }; 898 899 static int getAccessorIdx(char c) { 900 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 901 if (int idx = getColorAccessorIdx(c)+1) return idx-1; 902 return getTextureAccessorIdx(c); 903 } 904 905 bool isAccessorWithinNumElements(char c) const { 906 if (int idx = getAccessorIdx(c)+1) 907 return unsigned(idx-1) < NumElements; 908 return false; 909 } 910 virtual void getAsStringInternal(std::string &InnerString) const; 911 912 static bool classof(const Type *T) { 913 return T->getTypeClass() == ExtVector; 914 } 915 static bool classof(const ExtVectorType *) { return true; } 916}; 917 918/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 919/// class of FunctionTypeNoProto and FunctionTypeProto. 920/// 921class FunctionType : public Type { 922 /// SubClassData - This field is owned by the subclass, put here to pack 923 /// tightly with the ivars in Type. 924 bool SubClassData : 1; 925 926 /// TypeQuals - Used only by FunctionTypeProto, put here to pack with the 927 /// other bitfields. 928 /// The qualifiers are part of FunctionTypeProto because... 929 /// 930 /// C++ 8.3.5p4: The return type, the parameter type list and the 931 /// cv-qualifier-seq, [...], are part of the function type. 932 /// 933 unsigned TypeQuals : 3; 934 935 // The type returned by the function. 936 QualType ResultType; 937protected: 938 FunctionType(TypeClass tc, QualType res, bool SubclassInfo, 939 unsigned typeQuals, QualType Canonical) 940 : Type(tc, Canonical), 941 SubClassData(SubclassInfo), TypeQuals(typeQuals), ResultType(res) {} 942 bool getSubClassData() const { return SubClassData; } 943 unsigned getTypeQuals() const { return TypeQuals; } 944public: 945 946 QualType getResultType() const { return ResultType; } 947 948 949 static bool classof(const Type *T) { 950 return T->getTypeClass() == FunctionNoProto || 951 T->getTypeClass() == FunctionProto; 952 } 953 static bool classof(const FunctionType *) { return true; } 954}; 955 956/// FunctionTypeNoProto - Represents a K&R-style 'int foo()' function, which has 957/// no information available about its arguments. 958class FunctionTypeNoProto : public FunctionType, public llvm::FoldingSetNode { 959 FunctionTypeNoProto(QualType Result, QualType Canonical) 960 : FunctionType(FunctionNoProto, Result, false, 0, Canonical) {} 961 friend class ASTContext; // ASTContext creates these. 962public: 963 // No additional state past what FunctionType provides. 964 965 virtual void getAsStringInternal(std::string &InnerString) const; 966 967 void Profile(llvm::FoldingSetNodeID &ID) { 968 Profile(ID, getResultType()); 969 } 970 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType) { 971 ID.AddPointer(ResultType.getAsOpaquePtr()); 972 } 973 974 static bool classof(const Type *T) { 975 return T->getTypeClass() == FunctionNoProto; 976 } 977 static bool classof(const FunctionTypeNoProto *) { return true; } 978 979protected: 980 virtual void EmitImpl(llvm::Serializer& S) const; 981 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 982 friend class Type; 983}; 984 985/// FunctionTypeProto - Represents a prototype with argument type info, e.g. 986/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 987/// arguments, not as having a single void argument. 988class FunctionTypeProto : public FunctionType, public llvm::FoldingSetNode { 989 FunctionTypeProto(QualType Result, const QualType *ArgArray, unsigned numArgs, 990 bool isVariadic, unsigned typeQuals, QualType Canonical) 991 : FunctionType(FunctionProto, Result, isVariadic, typeQuals, Canonical), 992 NumArgs(numArgs) { 993 // Fill in the trailing argument array. 994 QualType *ArgInfo = reinterpret_cast<QualType *>(this+1);; 995 for (unsigned i = 0; i != numArgs; ++i) 996 ArgInfo[i] = ArgArray[i]; 997 } 998 999 /// NumArgs - The number of arguments this function has, not counting '...'. 1000 unsigned NumArgs; 1001 1002 /// ArgInfo - There is an variable size array after the class in memory that 1003 /// holds the argument types. 1004 1005 friend class ASTContext; // ASTContext creates these. 1006 virtual void Destroy(ASTContext& C); 1007 1008public: 1009 unsigned getNumArgs() const { return NumArgs; } 1010 QualType getArgType(unsigned i) const { 1011 assert(i < NumArgs && "Invalid argument number!"); 1012 return arg_type_begin()[i]; 1013 } 1014 1015 bool isVariadic() const { return getSubClassData(); } 1016 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 1017 1018 typedef const QualType *arg_type_iterator; 1019 arg_type_iterator arg_type_begin() const { 1020 return reinterpret_cast<const QualType *>(this+1); 1021 } 1022 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 1023 1024 virtual void getAsStringInternal(std::string &InnerString) const; 1025 1026 static bool classof(const Type *T) { 1027 return T->getTypeClass() == FunctionProto; 1028 } 1029 static bool classof(const FunctionTypeProto *) { return true; } 1030 1031 void Profile(llvm::FoldingSetNodeID &ID); 1032 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 1033 arg_type_iterator ArgTys, unsigned NumArgs, 1034 bool isVariadic, unsigned TypeQuals); 1035 1036protected: 1037 virtual void EmitImpl(llvm::Serializer& S) const; 1038 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 1039 friend class Type; 1040}; 1041 1042 1043class TypedefType : public Type { 1044 TypedefDecl *Decl; 1045protected: 1046 TypedefType(TypeClass tc, TypedefDecl *D, QualType can) 1047 : Type(tc, can), Decl(D) { 1048 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1049 } 1050 friend class ASTContext; // ASTContext creates these. 1051public: 1052 1053 TypedefDecl *getDecl() const { return Decl; } 1054 1055 /// LookThroughTypedefs - Return the ultimate type this typedef corresponds to 1056 /// potentially looking through *all* consequtive typedefs. This returns the 1057 /// sum of the type qualifiers, so if you have: 1058 /// typedef const int A; 1059 /// typedef volatile A B; 1060 /// looking through the typedefs for B will give you "const volatile A". 1061 QualType LookThroughTypedefs() const; 1062 1063 virtual void getAsStringInternal(std::string &InnerString) const; 1064 1065 static bool classof(const Type *T) { return T->getTypeClass() == TypeName; } 1066 static bool classof(const TypedefType *) { return true; } 1067 1068protected: 1069 virtual void EmitImpl(llvm::Serializer& S) const; 1070 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 1071 friend class Type; 1072}; 1073 1074/// TypeOfExpr (GCC extension). 1075class TypeOfExpr : public Type { 1076 Expr *TOExpr; 1077 TypeOfExpr(Expr *E, QualType can) : Type(TypeOfExp, can), TOExpr(E) { 1078 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1079 } 1080 friend class ASTContext; // ASTContext creates these. 1081public: 1082 Expr *getUnderlyingExpr() const { return TOExpr; } 1083 1084 virtual void getAsStringInternal(std::string &InnerString) const; 1085 1086 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExp; } 1087 static bool classof(const TypeOfExpr *) { return true; } 1088}; 1089 1090/// TypeOfType (GCC extension). 1091class TypeOfType : public Type { 1092 QualType TOType; 1093 TypeOfType(QualType T, QualType can) : Type(TypeOfTyp, can), TOType(T) { 1094 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1095 } 1096 friend class ASTContext; // ASTContext creates these. 1097public: 1098 QualType getUnderlyingType() const { return TOType; } 1099 1100 virtual void getAsStringInternal(std::string &InnerString) const; 1101 1102 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfTyp; } 1103 static bool classof(const TypeOfType *) { return true; } 1104}; 1105 1106class TagType : public Type { 1107 TagDecl *decl; 1108 friend class ASTContext; 1109 1110protected: 1111 TagType(TagDecl *D, QualType can) : Type(Tagged, can), decl(D) {} 1112 1113public: 1114 TagDecl *getDecl() const { return decl; } 1115 1116 virtual void getAsStringInternal(std::string &InnerString) const; 1117 1118 static bool classof(const Type *T) { return T->getTypeClass() == Tagged; } 1119 static bool classof(const TagType *) { return true; } 1120 1121protected: 1122 virtual void EmitImpl(llvm::Serializer& S) const; 1123 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 1124 friend class Type; 1125}; 1126 1127/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 1128/// to detect TagType objects of structs/unions/classes. 1129class RecordType : public TagType { 1130protected: 1131 explicit RecordType(RecordDecl *D) 1132 : TagType(reinterpret_cast<TagDecl*>(D), QualType()) { } 1133 friend class ASTContext; // ASTContext creates these. 1134public: 1135 1136 RecordDecl *getDecl() const { 1137 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 1138 } 1139 1140 // FIXME: This predicate is a helper to QualType/Type. It needs to 1141 // recursively check all fields for const-ness. If any field is declared 1142 // const, it needs to return false. 1143 bool hasConstFields() const { return false; } 1144 1145 // FIXME: RecordType needs to check when it is created that all fields are in 1146 // the same address space, and return that. 1147 unsigned getAddressSpace() const { return 0; } 1148 1149 static bool classof(const TagType *T); 1150 static bool classof(const Type *T) { 1151 return isa<TagType>(T) && classof(cast<TagType>(T)); 1152 } 1153 static bool classof(const RecordType *) { return true; } 1154}; 1155 1156/// CXXRecordType - This is a helper class that allows the use of 1157/// isa/cast/dyncast to detect TagType objects of C++ structs/unions/classes. 1158class CXXRecordType : public RecordType { 1159 explicit CXXRecordType(CXXRecordDecl *D) 1160 : RecordType(reinterpret_cast<RecordDecl*>(D)) { } 1161 friend class ASTContext; // ASTContext creates these. 1162public: 1163 1164 CXXRecordDecl *getDecl() const { 1165 return reinterpret_cast<CXXRecordDecl*>(RecordType::getDecl()); 1166 } 1167 1168 static bool classof(const TagType *T); 1169 static bool classof(const Type *T) { 1170 return isa<TagType>(T) && classof(cast<TagType>(T)); 1171 } 1172 static bool classof(const CXXRecordType *) { return true; } 1173}; 1174 1175/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 1176/// to detect TagType objects of enums. 1177class EnumType : public TagType { 1178 explicit EnumType(EnumDecl *D) 1179 : TagType(reinterpret_cast<TagDecl*>(D), QualType()) { } 1180 friend class ASTContext; // ASTContext creates these. 1181public: 1182 1183 EnumDecl *getDecl() const { 1184 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 1185 } 1186 1187 static bool classof(const TagType *T); 1188 static bool classof(const Type *T) { 1189 return isa<TagType>(T) && classof(cast<TagType>(T)); 1190 } 1191 static bool classof(const EnumType *) { return true; } 1192}; 1193 1194 1195 1196/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 1197/// object oriented design. They basically correspond to C++ classes. There 1198/// are two kinds of interface types, normal interfaces like "NSString" and 1199/// qualified interfaces, which are qualified with a protocol list like 1200/// "NSString<NSCopyable, NSAmazing>". Qualified interface types are instances 1201/// of ObjCQualifiedInterfaceType, which is a subclass of ObjCInterfaceType. 1202class ObjCInterfaceType : public Type { 1203 ObjCInterfaceDecl *Decl; 1204protected: 1205 ObjCInterfaceType(TypeClass tc, ObjCInterfaceDecl *D) : 1206 Type(tc, QualType()), Decl(D) { } 1207 friend class ASTContext; // ASTContext creates these. 1208public: 1209 1210 ObjCInterfaceDecl *getDecl() const { return Decl; } 1211 1212 /// qual_iterator and friends: this provides access to the (potentially empty) 1213 /// list of protocols qualifying this interface. If this is an instance of 1214 /// ObjCQualifiedInterfaceType it returns the list, otherwise it returns an 1215 /// empty list if there are no qualifying protocols. 1216 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 1217 inline qual_iterator qual_begin() const; 1218 inline qual_iterator qual_end() const; 1219 bool qual_empty() const { return getTypeClass() != ObjCQualifiedInterface; } 1220 1221 /// getNumProtocols - Return the number of qualifying protocols in this 1222 /// interface type, or 0 if there are none. 1223 inline unsigned getNumProtocols() const; 1224 1225 /// getProtocol - Return the specified qualifying protocol. 1226 inline ObjCProtocolDecl *getProtocol(unsigned i) const; 1227 1228 1229 virtual void getAsStringInternal(std::string &InnerString) const; 1230 static bool classof(const Type *T) { 1231 return T->getTypeClass() == ObjCInterface || 1232 T->getTypeClass() == ObjCQualifiedInterface; 1233 } 1234 static bool classof(const ObjCInterfaceType *) { return true; } 1235}; 1236 1237/// ObjCQualifiedInterfaceType - This class represents interface types 1238/// conforming to a list of protocols, such as INTF<Proto1, Proto2, Proto1>. 1239/// 1240/// Duplicate protocols are removed and protocol list is canonicalized to be in 1241/// alphabetical order. 1242class ObjCQualifiedInterfaceType : public ObjCInterfaceType, 1243 public llvm::FoldingSetNode { 1244 1245 // List of protocols for this protocol conforming object type 1246 // List is sorted on protocol name. No protocol is enterred more than once. 1247 llvm::SmallVector<ObjCProtocolDecl*, 4> Protocols; 1248 1249 ObjCQualifiedInterfaceType(ObjCInterfaceDecl *D, 1250 ObjCProtocolDecl **Protos, unsigned NumP) : 1251 ObjCInterfaceType(ObjCQualifiedInterface, D), 1252 Protocols(Protos, Protos+NumP) { } 1253 friend class ASTContext; // ASTContext creates these. 1254public: 1255 1256 ObjCProtocolDecl *getProtocol(unsigned i) const { 1257 return Protocols[i]; 1258 } 1259 unsigned getNumProtocols() const { 1260 return Protocols.size(); 1261 } 1262 1263 qual_iterator qual_begin() const { return Protocols.begin(); } 1264 qual_iterator qual_end() const { return Protocols.end(); } 1265 1266 virtual void getAsStringInternal(std::string &InnerString) const; 1267 1268 void Profile(llvm::FoldingSetNodeID &ID); 1269 static void Profile(llvm::FoldingSetNodeID &ID, 1270 const ObjCInterfaceDecl *Decl, 1271 ObjCProtocolDecl **protocols, unsigned NumProtocols); 1272 1273 static bool classof(const Type *T) { 1274 return T->getTypeClass() == ObjCQualifiedInterface; 1275 } 1276 static bool classof(const ObjCQualifiedInterfaceType *) { return true; } 1277}; 1278 1279inline ObjCInterfaceType::qual_iterator ObjCInterfaceType::qual_begin() const { 1280 if (const ObjCQualifiedInterfaceType *QIT = 1281 dyn_cast<ObjCQualifiedInterfaceType>(this)) 1282 return QIT->qual_begin(); 1283 return 0; 1284} 1285inline ObjCInterfaceType::qual_iterator ObjCInterfaceType::qual_end() const { 1286 if (const ObjCQualifiedInterfaceType *QIT = 1287 dyn_cast<ObjCQualifiedInterfaceType>(this)) 1288 return QIT->qual_end(); 1289 return 0; 1290} 1291 1292/// getNumProtocols - Return the number of qualifying protocols in this 1293/// interface type, or 0 if there are none. 1294inline unsigned ObjCInterfaceType::getNumProtocols() const { 1295 if (const ObjCQualifiedInterfaceType *QIT = 1296 dyn_cast<ObjCQualifiedInterfaceType>(this)) 1297 return QIT->getNumProtocols(); 1298 return 0; 1299} 1300 1301/// getProtocol - Return the specified qualifying protocol. 1302inline ObjCProtocolDecl *ObjCInterfaceType::getProtocol(unsigned i) const { 1303 return cast<ObjCQualifiedInterfaceType>(this)->getProtocol(i); 1304} 1305 1306 1307 1308/// ObjCQualifiedIdType - to represent id<protocol-list>. 1309/// 1310/// Duplicate protocols are removed and protocol list is canonicalized to be in 1311/// alphabetical order. 1312class ObjCQualifiedIdType : public Type, 1313 public llvm::FoldingSetNode { 1314 // List of protocols for this protocol conforming 'id' type 1315 // List is sorted on protocol name. No protocol is enterred more than once. 1316 llvm::SmallVector<ObjCProtocolDecl*, 8> Protocols; 1317 1318 ObjCQualifiedIdType(ObjCProtocolDecl **Protos, unsigned NumP) 1319 : Type(ObjCQualifiedId, QualType()/*these are always canonical*/), 1320 Protocols(Protos, Protos+NumP) { } 1321 friend class ASTContext; // ASTContext creates these. 1322public: 1323 1324 ObjCProtocolDecl *getProtocols(unsigned i) const { 1325 return Protocols[i]; 1326 } 1327 unsigned getNumProtocols() const { 1328 return Protocols.size(); 1329 } 1330 ObjCProtocolDecl **getReferencedProtocols() { 1331 return &Protocols[0]; 1332 } 1333 1334 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 1335 qual_iterator qual_begin() const { return Protocols.begin(); } 1336 qual_iterator qual_end() const { return Protocols.end(); } 1337 1338 virtual void getAsStringInternal(std::string &InnerString) const; 1339 1340 void Profile(llvm::FoldingSetNodeID &ID); 1341 static void Profile(llvm::FoldingSetNodeID &ID, 1342 ObjCProtocolDecl **protocols, unsigned NumProtocols); 1343 1344 static bool classof(const Type *T) { 1345 return T->getTypeClass() == ObjCQualifiedId; 1346 } 1347 static bool classof(const ObjCQualifiedIdType *) { return true; } 1348 1349}; 1350 1351 1352// Inline function definitions. 1353 1354/// getUnqualifiedType - Return the type without any qualifiers. 1355inline QualType QualType::getUnqualifiedType() const { 1356 Type *TP = getTypePtr(); 1357 if (const ASQualType *ASQT = dyn_cast<ASQualType>(TP)) 1358 TP = ASQT->getBaseType(); 1359 return QualType(TP, 0); 1360} 1361 1362/// getAddressSpace - Return the address space of this type. 1363inline unsigned QualType::getAddressSpace() const { 1364 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 1365 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 1366 return AT->getElementType().getAddressSpace(); 1367 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 1368 return RT->getAddressSpace(); 1369 if (const ASQualType *ASQT = dyn_cast<ASQualType>(CT)) 1370 return ASQT->getAddressSpace(); 1371 return 0; 1372} 1373 1374/// isMoreQualifiedThan - Determine whether this type is more 1375/// qualified than the Other type. For example, "const volatile int" 1376/// is more qualified than "const int", "volatile int", and 1377/// "int". However, it is not more qualified than "const volatile 1378/// int". 1379inline bool QualType::isMoreQualifiedThan(QualType Other) const { 1380 // FIXME: Handle address spaces 1381 unsigned MyQuals = this->getCVRQualifiers(); 1382 unsigned OtherQuals = Other.getCVRQualifiers(); 1383 assert(this->getAddressSpace() == 0 && "Address space not checked"); 1384 assert(Other.getAddressSpace() == 0 && "Address space not checked"); 1385 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 1386} 1387 1388/// isAtLeastAsQualifiedAs - Determine whether this type is at last 1389/// as qualified as the Other type. For example, "const volatile 1390/// int" is at least as qualified as "const int", "volatile int", 1391/// "int", and "const volatile int". 1392inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 1393 // FIXME: Handle address spaces 1394 unsigned MyQuals = this->getCVRQualifiers(); 1395 unsigned OtherQuals = Other.getCVRQualifiers(); 1396 assert(this->getAddressSpace() == 0 && "Address space not checked"); 1397 assert(Other.getAddressSpace() == 0 && "Address space not checked"); 1398 return (MyQuals | OtherQuals) == MyQuals; 1399} 1400 1401/// getNonReferenceType - If Type is a reference type (e.g., const 1402/// int&), returns the type that the reference refers to ("const 1403/// int"). Otherwise, returns the type itself. This routine is used 1404/// throughout Sema to implement C++ 5p6: 1405/// 1406/// If an expression initially has the type "reference to T" (8.3.2, 1407/// 8.5.3), the type is adjusted to "T" prior to any further 1408/// analysis, the expression designates the object or function 1409/// denoted by the reference, and the expression is an lvalue. 1410inline QualType QualType::getNonReferenceType() const { 1411 if (const ReferenceType *RefType = (*this)->getAsReferenceType()) 1412 return RefType->getPointeeType(); 1413 else 1414 return *this; 1415} 1416 1417inline const TypedefType* Type::getAsTypedefType() const { 1418 return dyn_cast<TypedefType>(this); 1419} 1420inline const ObjCInterfaceType *Type::getAsPointerToObjCInterfaceType() const { 1421 if (const PointerType *PT = getAsPointerType()) 1422 return PT->getPointeeType()->getAsObjCInterfaceType(); 1423 return 0; 1424} 1425 1426// NOTE: All of these methods use "getUnqualifiedType" to strip off address 1427// space qualifiers if present. 1428inline bool Type::isFunctionType() const { 1429 return isa<FunctionType>(CanonicalType.getUnqualifiedType()); 1430} 1431inline bool Type::isPointerType() const { 1432 return isa<PointerType>(CanonicalType.getUnqualifiedType()); 1433} 1434inline bool Type::isBlockPointerType() const { 1435 return isa<BlockPointerType>(CanonicalType); 1436} 1437inline bool Type::isReferenceType() const { 1438 return isa<ReferenceType>(CanonicalType.getUnqualifiedType()); 1439} 1440inline bool Type::isPointerLikeType() const { 1441 return isa<PointerLikeType>(CanonicalType.getUnqualifiedType()); 1442} 1443inline bool Type::isFunctionPointerType() const { 1444 if (const PointerType* T = getAsPointerType()) 1445 return T->getPointeeType()->isFunctionType(); 1446 else 1447 return false; 1448} 1449inline bool Type::isArrayType() const { 1450 return isa<ArrayType>(CanonicalType.getUnqualifiedType()); 1451} 1452inline bool Type::isConstantArrayType() const { 1453 return isa<ConstantArrayType>(CanonicalType.getUnqualifiedType()); 1454} 1455inline bool Type::isIncompleteArrayType() const { 1456 return isa<IncompleteArrayType>(CanonicalType.getUnqualifiedType()); 1457} 1458inline bool Type::isVariableArrayType() const { 1459 return isa<VariableArrayType>(CanonicalType.getUnqualifiedType()); 1460} 1461inline bool Type::isRecordType() const { 1462 return isa<RecordType>(CanonicalType.getUnqualifiedType()); 1463} 1464inline bool Type::isAnyComplexType() const { 1465 return isa<ComplexType>(CanonicalType.getUnqualifiedType()); 1466} 1467inline bool Type::isVectorType() const { 1468 return isa<VectorType>(CanonicalType.getUnqualifiedType()); 1469} 1470inline bool Type::isExtVectorType() const { 1471 return isa<ExtVectorType>(CanonicalType.getUnqualifiedType()); 1472} 1473inline bool Type::isObjCInterfaceType() const { 1474 return isa<ObjCInterfaceType>(CanonicalType.getUnqualifiedType()); 1475} 1476inline bool Type::isObjCQualifiedInterfaceType() const { 1477 return isa<ObjCQualifiedInterfaceType>(CanonicalType.getUnqualifiedType()); 1478} 1479inline bool Type::isObjCQualifiedIdType() const { 1480 return isa<ObjCQualifiedIdType>(CanonicalType.getUnqualifiedType()); 1481} 1482inline bool Type::isOverloadType() const { 1483 if (const BuiltinType *BT = getAsBuiltinType()) 1484 return BT->getKind() == BuiltinType::Overload; 1485 else 1486 return false; 1487} 1488 1489/// Insertion operator for diagnostics. This allows sending QualType's into a 1490/// diagnostic with <<. 1491inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 1492 QualType T) { 1493 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 1494 Diagnostic::ak_qualtype); 1495 return DB; 1496} 1497 1498 1499} // end namespace clang 1500 1501#endif 1502