Type.h revision 9b6e2d209cc2931a9bb2ae51e744a8698b54db73
1//===--- Type.h - C Language Family Type Representation ---------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Type interface and subclasses. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_CLANG_AST_TYPE_H 15#define LLVM_CLANG_AST_TYPE_H 16 17#include "llvm/Support/Casting.h" 18#include "llvm/ADT/FoldingSet.h" 19#include "llvm/ADT/APSInt.h" 20#include "llvm/Bitcode/SerializationFwd.h" 21 22using llvm::isa; 23using llvm::cast; 24using llvm::cast_or_null; 25using llvm::dyn_cast; 26using llvm::dyn_cast_or_null; 27 28namespace clang { 29 class ASTContext; 30 class Type; 31 class TypedefDecl; 32 class TagDecl; 33 class RecordDecl; 34 class CXXRecordDecl; 35 class EnumDecl; 36 class FieldDecl; 37 class ObjCInterfaceDecl; 38 class ObjCProtocolDecl; 39 class ObjCMethodDecl; 40 class Expr; 41 class Stmt; 42 class SourceLocation; 43 class PointerLikeType; 44 class PointerType; 45 class BlockPointerType; 46 class ReferenceType; 47 class VectorType; 48 class ArrayType; 49 class ConstantArrayType; 50 class VariableArrayType; 51 class IncompleteArrayType; 52 class RecordType; 53 class EnumType; 54 class ComplexType; 55 class TagType; 56 class TypedefType; 57 class FunctionType; 58 class FunctionTypeProto; 59 class ExtVectorType; 60 class BuiltinType; 61 class ObjCInterfaceType; 62 class ObjCQualifiedIdType; 63 class ObjCQualifiedInterfaceType; 64 class StmtIteratorBase; 65 66/// QualType - For efficiency, we don't store CVR-qualified types as nodes on 67/// their own: instead each reference to a type stores the qualifiers. This 68/// greatly reduces the number of nodes we need to allocate for types (for 69/// example we only need one for 'int', 'const int', 'volatile int', 70/// 'const volatile int', etc). 71/// 72/// As an added efficiency bonus, instead of making this a pair, we just store 73/// the three bits we care about in the low bits of the pointer. To handle the 74/// packing/unpacking, we make QualType be a simple wrapper class that acts like 75/// a smart pointer. 76class QualType { 77 uintptr_t ThePtr; 78public: 79 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 80 Const = 0x1, 81 Restrict = 0x2, 82 Volatile = 0x4, 83 CVRFlags = Const|Restrict|Volatile 84 }; 85 86 QualType() : ThePtr(0) {} 87 88 QualType(Type *Ptr, unsigned Quals) { 89 assert((Quals & ~CVRFlags) == 0 && "Invalid type qualifiers!"); 90 ThePtr = reinterpret_cast<uintptr_t>(Ptr); 91 assert((ThePtr & CVRFlags) == 0 && "Type pointer not 8-byte aligned?"); 92 ThePtr |= Quals; 93 } 94 95 QualType(const Type *Ptr, unsigned Quals) { 96 assert((Quals & ~CVRFlags) == 0 && "Invalid type qualifiers!"); 97 ThePtr = reinterpret_cast<uintptr_t>(Ptr); 98 assert((ThePtr & CVRFlags) == 0 && "Type pointer not 8-byte aligned?"); 99 ThePtr |= Quals; 100 } 101 102 static QualType getFromOpaquePtr(void *Ptr) { 103 QualType T; 104 T.ThePtr = reinterpret_cast<uintptr_t>(Ptr); 105 return T; 106 } 107 108 unsigned getCVRQualifiers() const { 109 return ThePtr & CVRFlags; 110 } 111 Type *getTypePtr() const { 112 return reinterpret_cast<Type*>(ThePtr & ~CVRFlags); 113 } 114 115 void *getAsOpaquePtr() const { 116 return reinterpret_cast<void*>(ThePtr); 117 } 118 119 Type &operator*() const { 120 return *getTypePtr(); 121 } 122 123 Type *operator->() const { 124 return getTypePtr(); 125 } 126 127 /// isNull - Return true if this QualType doesn't point to a type yet. 128 bool isNull() const { 129 return ThePtr == 0; 130 } 131 132 bool isConstQualified() const { 133 return (ThePtr & Const) ? true : false; 134 } 135 bool isVolatileQualified() const { 136 return (ThePtr & Volatile) ? true : false; 137 } 138 bool isRestrictQualified() const { 139 return (ThePtr & Restrict) ? true : false; 140 } 141 142 bool isConstant(ASTContext& Ctx) const; 143 144 /// addConst/addVolatile/addRestrict - add the specified type qual to this 145 /// QualType. 146 void addConst() { ThePtr |= Const; } 147 void addVolatile() { ThePtr |= Volatile; } 148 void addRestrict() { ThePtr |= Restrict; } 149 150 void removeConst() { ThePtr &= ~Const; } 151 void removeVolatile() { ThePtr &= ~Volatile; } 152 void removeRestrict() { ThePtr &= ~Restrict; } 153 154 QualType getQualifiedType(unsigned TQs) const { 155 return QualType(getTypePtr(), TQs); 156 } 157 QualType getWithAdditionalQualifiers(unsigned TQs) const { 158 return QualType(getTypePtr(), TQs|getCVRQualifiers()); 159 } 160 161 inline QualType getUnqualifiedType() const; 162 163 /// isMoreQualifiedThan - Determine whether this type is more 164 /// qualified than the Other type. For example, "const volatile int" 165 /// is more qualified than "const int", "volatile int", and 166 /// "int". However, it is not more qualified than "const volatile 167 /// int". 168 bool isMoreQualifiedThan(QualType Other) const { 169 unsigned MyQuals = this->getCVRQualifiers(); 170 unsigned OtherQuals = Other.getCVRQualifiers(); 171 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 172 } 173 174 /// isAtLeastAsQualifiedAs - Determine whether this type is at last 175 /// as qualified as the Other type. For example, "const volatile 176 /// int" is at least as qualified as "const int", "volatile int", 177 /// "int", and "const volatile int". 178 bool isAtLeastAsQualifiedAs(QualType Other) const { 179 unsigned MyQuals = this->getCVRQualifiers(); 180 unsigned OtherQuals = Other.getCVRQualifiers(); 181 return (MyQuals | OtherQuals) == MyQuals; 182 } 183 184 /// operator==/!= - Indicate whether the specified types and qualifiers are 185 /// identical. 186 bool operator==(const QualType &RHS) const { 187 return ThePtr == RHS.ThePtr; 188 } 189 bool operator!=(const QualType &RHS) const { 190 return ThePtr != RHS.ThePtr; 191 } 192 std::string getAsString() const { 193 std::string S; 194 getAsStringInternal(S); 195 return S; 196 } 197 void getAsStringInternal(std::string &Str) const; 198 199 void dump(const char *s) const; 200 void dump() const; 201 202 void Profile(llvm::FoldingSetNodeID &ID) const { 203 ID.AddPointer(getAsOpaquePtr()); 204 } 205 206public: 207 208 /// getAddressSpace - Return the address space of this type. 209 inline unsigned getAddressSpace() const; 210 211 /// Emit - Serialize a QualType to Bitcode. 212 void Emit(llvm::Serializer& S) const; 213 214 /// Read - Deserialize a QualType from Bitcode. 215 static QualType ReadVal(llvm::Deserializer& D); 216 217 void ReadBackpatch(llvm::Deserializer& D); 218}; 219 220} // end clang. 221 222namespace llvm { 223/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 224/// to a specific Type class. 225template<> struct simplify_type<const ::clang::QualType> { 226 typedef ::clang::Type* SimpleType; 227 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 228 return Val.getTypePtr(); 229 } 230}; 231template<> struct simplify_type< ::clang::QualType> 232 : public simplify_type<const ::clang::QualType> {}; 233 234} // end namespace llvm 235 236namespace clang { 237 238/// Type - This is the base class of the type hierarchy. A central concept 239/// with types is that each type always has a canonical type. A canonical type 240/// is the type with any typedef names stripped out of it or the types it 241/// references. For example, consider: 242/// 243/// typedef int foo; 244/// typedef foo* bar; 245/// 'int *' 'foo *' 'bar' 246/// 247/// There will be a Type object created for 'int'. Since int is canonical, its 248/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 249/// TypeNameType). Its CanonicalType pointer points to the 'int' Type. Next 250/// there is a PointerType that represents 'int*', which, like 'int', is 251/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 252/// type is 'int*', and there is a TypeNameType for 'bar', whose canonical type 253/// is also 'int*'. 254/// 255/// Non-canonical types are useful for emitting diagnostics, without losing 256/// information about typedefs being used. Canonical types are useful for type 257/// comparisons (they allow by-pointer equality tests) and useful for reasoning 258/// about whether something has a particular form (e.g. is a function type), 259/// because they implicitly, recursively, strip all typedefs out of a type. 260/// 261/// Types, once created, are immutable. 262/// 263class Type { 264public: 265 enum TypeClass { 266 Builtin, Complex, Pointer, Reference, 267 ConstantArray, VariableArray, IncompleteArray, 268 Vector, ExtVector, 269 FunctionNoProto, FunctionProto, 270 TypeName, Tagged, ASQual, 271 ObjCInterface, ObjCQualifiedInterface, 272 ObjCQualifiedId, 273 TypeOfExp, TypeOfTyp, // GNU typeof extension. 274 BlockPointer // C extension 275 }; 276private: 277 QualType CanonicalType; 278 279 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 280 /// Note that this should stay at the end of the ivars for Type so that 281 /// subclasses can pack their bitfields into the same word. 282 unsigned TC : 5; 283protected: 284 // silence VC++ warning C4355: 'this' : used in base member initializer list 285 Type *this_() { return this; } 286 Type(TypeClass tc, QualType Canonical) 287 : CanonicalType(Canonical.isNull() ? QualType(this_(), 0) : Canonical), 288 TC(tc) {} 289 virtual ~Type() {}; 290 virtual void Destroy(ASTContext& C); 291 friend class ASTContext; 292 293 void EmitTypeInternal(llvm::Serializer& S) const; 294 void ReadTypeInternal(llvm::Deserializer& D); 295 296public: 297 TypeClass getTypeClass() const { return static_cast<TypeClass>(TC); } 298 299 bool isCanonical() const { return CanonicalType.getTypePtr() == this; } 300 301 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 302 /// object types, function types, and incomplete types. 303 304 /// isObjectType - types that fully describe objects. An object is a region 305 /// of memory that can be examined and stored into (H&S). 306 bool isObjectType() const; 307 308 /// isIncompleteType - Return true if this is an incomplete type. 309 /// A type that can describe objects, but which lacks information needed to 310 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 311 /// routine will need to determine if the size is actually required. 312 bool isIncompleteType() const; 313 314 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 315 /// type, in other words, not a function type. 316 bool isIncompleteOrObjectType() const { 317 return !isFunctionType(); 318 } 319 320 /// isVariablyModifiedType (C99 6.7.5.2p2) - Return true for variable array 321 /// types that have a non-constant expression. This does not include "[]". 322 bool isVariablyModifiedType() const; 323 324 /// Helper methods to distinguish type categories. All type predicates 325 /// operate on the canonical type, ignoring typedefs and qualifiers. 326 327 /// isIntegerType() does *not* include complex integers (a GCC extension). 328 /// isComplexIntegerType() can be used to test for complex integers. 329 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 330 bool isEnumeralType() const; 331 bool isBooleanType() const; 332 bool isCharType() const; 333 bool isWideCharType() const; 334 bool isIntegralType() const; 335 336 /// Floating point categories. 337 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 338 /// isComplexType() does *not* include complex integers (a GCC extension). 339 /// isComplexIntegerType() can be used to test for complex integers. 340 bool isComplexType() const; // C99 6.2.5p11 (complex) 341 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 342 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 343 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 344 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 345 bool isVoidType() const; // C99 6.2.5p19 346 bool isDerivedType() const; // C99 6.2.5p20 347 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 348 bool isAggregateType() const; // C99 6.2.5p21 (arrays, structures) 349 350 // Type Predicates: Check to see if this type is structurally the specified 351 // type, ignoring typedefs and qualifiers. 352 bool isFunctionType() const; 353 bool isPointerLikeType() const; // Pointer or Reference. 354 bool isPointerType() const; 355 bool isBlockPointerType() const; 356 bool isReferenceType() const; 357 bool isFunctionPointerType() const; 358 bool isArrayType() const; 359 bool isConstantArrayType() const; 360 bool isIncompleteArrayType() const; 361 bool isVariableArrayType() const; 362 bool isRecordType() const; 363 bool isClassType() const; 364 bool isStructureType() const; 365 bool isUnionType() const; 366 bool isComplexIntegerType() const; // GCC _Complex integer type. 367 bool isVectorType() const; // GCC vector type. 368 bool isExtVectorType() const; // Extended vector type. 369 bool isObjCInterfaceType() const; // NSString or NSString<foo> 370 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 371 bool isObjCQualifiedIdType() const; // id<foo> 372 373 // Type Checking Functions: Check to see if this type is structurally the 374 // specified type, ignoring typedefs and qualifiers, and return a pointer to 375 // the best type we can. 376 const BuiltinType *getAsBuiltinType() const; 377 const FunctionType *getAsFunctionType() const; 378 const FunctionTypeProto *getAsFunctionTypeProto() const; 379 const PointerLikeType *getAsPointerLikeType() const; // Pointer or Reference. 380 const PointerType *getAsPointerType() const; 381 const BlockPointerType *getAsBlockPointerType() const; 382 const ReferenceType *getAsReferenceType() const; 383 const RecordType *getAsRecordType() const; 384 const RecordType *getAsStructureType() const; 385 /// NOTE: getAsArrayType* are methods on ASTContext. 386 const TypedefType *getAsTypedefType() const; 387 const RecordType *getAsUnionType() const; 388 const EnumType *getAsEnumType() const; 389 const VectorType *getAsVectorType() const; // GCC vector type. 390 const ComplexType *getAsComplexType() const; 391 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 392 const ExtVectorType *getAsExtVectorType() const; // Extended vector type. 393 const ObjCInterfaceType *getAsObjCInterfaceType() const; 394 const ObjCQualifiedInterfaceType *getAsObjCQualifiedInterfaceType() const; 395 const ObjCQualifiedIdType *getAsObjCQualifiedIdType() const; 396 397 /// getAsPointerToObjCInterfaceType - If this is a pointer to an ObjC 398 /// interface, return the interface type, otherwise return null. 399 const ObjCInterfaceType *getAsPointerToObjCInterfaceType() const; 400 401 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 402 /// element type of the array, potentially with type qualifiers missing. 403 /// This method should never be used when type qualifiers are meaningful. 404 const Type *getArrayElementTypeNoTypeQual() const; 405 406 407 408 /// getDesugaredType - Return the specified type with any "sugar" removed from 409 /// the type. This takes off typedefs, typeof's etc. If the outer level of 410 /// the type is already concrete, it returns it unmodified. This is similar 411 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 412 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 413 /// concrete. 414 QualType getDesugaredType() const; 415 416 /// More type predicates useful for type checking/promotion 417 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 418 419 /// isSignedIntegerType - Return true if this is an integer type that is 420 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 421 /// an enum decl which has a signed representation, or a vector of signed 422 /// integer element type. 423 bool isSignedIntegerType() const; 424 425 /// isUnsignedIntegerType - Return true if this is an integer type that is 426 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 427 /// decl which has an unsigned representation, or a vector of unsigned integer 428 /// element type. 429 bool isUnsignedIntegerType() const; 430 431 /// isConstantSizeType - Return true if this is not a variable sized type, 432 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 433 /// incomplete types. 434 bool isConstantSizeType() const; 435 436 QualType getCanonicalTypeInternal() const { return CanonicalType; } 437 void dump() const; 438 virtual void getAsStringInternal(std::string &InnerString) const = 0; 439 static bool classof(const Type *) { return true; } 440 441protected: 442 /// Emit - Emit a Type to bitcode. Used by ASTContext. 443 void Emit(llvm::Serializer& S) const; 444 445 /// Create - Construct a Type from bitcode. Used by ASTContext. 446 static void Create(ASTContext& Context, unsigned i, llvm::Deserializer& S); 447 448 /// EmitImpl - Subclasses must implement this method in order to 449 /// be serialized. 450 // FIXME: Make this abstract once implemented. 451 virtual void EmitImpl(llvm::Serializer& S) const { 452 assert (false && "Serializization for type not supported."); 453 } 454}; 455 456/// ASQualType - TR18037 (C embedded extensions) 6.2.5p26 457/// This supports address space qualified types. 458/// 459class ASQualType : public Type, public llvm::FoldingSetNode { 460 /// BaseType - This is the underlying type that this qualifies. All CVR 461 /// qualifiers are stored on the QualType that references this type, so we 462 /// can't have any here. 463 Type *BaseType; 464 /// Address Space ID - The address space ID this type is qualified with. 465 unsigned AddressSpace; 466 ASQualType(Type *Base, QualType CanonicalPtr, unsigned AddrSpace) : 467 Type(ASQual, CanonicalPtr), BaseType(Base), AddressSpace(AddrSpace) { 468 } 469 friend class ASTContext; // ASTContext creates these. 470public: 471 Type *getBaseType() const { return BaseType; } 472 unsigned getAddressSpace() const { return AddressSpace; } 473 474 virtual void getAsStringInternal(std::string &InnerString) const; 475 476 void Profile(llvm::FoldingSetNodeID &ID) { 477 Profile(ID, getBaseType(), AddressSpace); 478 } 479 static void Profile(llvm::FoldingSetNodeID &ID, Type *Base, 480 unsigned AddrSpace) { 481 ID.AddPointer(Base); 482 ID.AddInteger(AddrSpace); 483 } 484 485 static bool classof(const Type *T) { return T->getTypeClass() == ASQual; } 486 static bool classof(const ASQualType *) { return true; } 487 488protected: 489 virtual void EmitImpl(llvm::Serializer& S) const; 490 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 491 friend class Type; 492}; 493 494 495/// BuiltinType - This class is used for builtin types like 'int'. Builtin 496/// types are always canonical and have a literal name field. 497class BuiltinType : public Type { 498public: 499 enum Kind { 500 Void, 501 502 Bool, // This is bool and/or _Bool. 503 Char_U, // This is 'char' for targets where char is unsigned. 504 UChar, // This is explicitly qualified unsigned char. 505 UShort, 506 UInt, 507 ULong, 508 ULongLong, 509 510 Char_S, // This is 'char' for targets where char is signed. 511 SChar, // This is explicitly qualified signed char. 512 WChar, // This is 'wchar_t' for C++. 513 Short, 514 Int, 515 Long, 516 LongLong, 517 518 Float, Double, LongDouble, 519 520 Overload // This represents the type of an overloaded function declaration. 521 }; 522private: 523 Kind TypeKind; 524public: 525 BuiltinType(Kind K) : Type(Builtin, QualType()), TypeKind(K) {} 526 527 Kind getKind() const { return TypeKind; } 528 const char *getName() const; 529 530 virtual void getAsStringInternal(std::string &InnerString) const; 531 532 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 533 static bool classof(const BuiltinType *) { return true; } 534}; 535 536/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 537/// types (_Complex float etc) as well as the GCC integer complex extensions. 538/// 539class ComplexType : public Type, public llvm::FoldingSetNode { 540 QualType ElementType; 541 ComplexType(QualType Element, QualType CanonicalPtr) : 542 Type(Complex, CanonicalPtr), ElementType(Element) { 543 } 544 friend class ASTContext; // ASTContext creates these. 545public: 546 QualType getElementType() const { return ElementType; } 547 548 virtual void getAsStringInternal(std::string &InnerString) const; 549 550 void Profile(llvm::FoldingSetNodeID &ID) { 551 Profile(ID, getElementType()); 552 } 553 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 554 ID.AddPointer(Element.getAsOpaquePtr()); 555 } 556 557 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 558 static bool classof(const ComplexType *) { return true; } 559 560protected: 561 virtual void EmitImpl(llvm::Serializer& S) const; 562 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 563 friend class Type; 564}; 565 566/// PointerLikeType - Common base class for pointers and references. 567/// FIXME: Add more documentation on this classes design point. For example, 568/// should BlockPointerType inherit from it? Is the concept of a PointerLikeType 569/// in the C++ standard? 570/// 571class PointerLikeType : public Type { 572 QualType PointeeType; 573protected: 574 PointerLikeType(TypeClass K, QualType Pointee, QualType CanonicalPtr) : 575 Type(K, CanonicalPtr), PointeeType(Pointee) { 576 } 577public: 578 579 QualType getPointeeType() const { return PointeeType; } 580 581 static bool classof(const Type *T) { 582 return T->getTypeClass() == Pointer || T->getTypeClass() == Reference; 583 } 584 static bool classof(const PointerLikeType *) { return true; } 585}; 586 587/// PointerType - C99 6.7.5.1 - Pointer Declarators. 588/// 589class PointerType : public PointerLikeType, public llvm::FoldingSetNode { 590 PointerType(QualType Pointee, QualType CanonicalPtr) : 591 PointerLikeType(Pointer, Pointee, CanonicalPtr) { 592 } 593 friend class ASTContext; // ASTContext creates these. 594public: 595 596 virtual void getAsStringInternal(std::string &InnerString) const; 597 598 void Profile(llvm::FoldingSetNodeID &ID) { 599 Profile(ID, getPointeeType()); 600 } 601 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 602 ID.AddPointer(Pointee.getAsOpaquePtr()); 603 } 604 605 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 606 static bool classof(const PointerType *) { return true; } 607 608protected: 609 virtual void EmitImpl(llvm::Serializer& S) const; 610 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 611 friend class Type; 612}; 613 614/// BlockPointerType - pointer to a block type. 615/// This type is to represent types syntactically represented as 616/// "void (^)(int)", etc. Pointee is required to always be a function type. 617/// FIXME: Should BlockPointerType inherit from PointerLikeType? It could 618/// simplfy some type checking code, however PointerLikeType doesn't appear 619/// to be used by the type checker. 620/// 621class BlockPointerType : public Type, public llvm::FoldingSetNode { 622 QualType PointeeType; // Block is some kind of pointer type 623 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 624 Type(BlockPointer, CanonicalCls), PointeeType(Pointee) { 625 } 626 friend class ASTContext; // ASTContext creates these. 627public: 628 629 // Get the pointee type. Pointee is required to always be a function type. 630 QualType getPointeeType() const { return PointeeType; } 631 632 virtual void getAsStringInternal(std::string &InnerString) const; 633 634 void Profile(llvm::FoldingSetNodeID &ID) { 635 Profile(ID, getPointeeType()); 636 } 637 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 638 ID.AddPointer(Pointee.getAsOpaquePtr()); 639 } 640 641 static bool classof(const Type *T) { 642 return T->getTypeClass() == BlockPointer; 643 } 644 static bool classof(const BlockPointerType *) { return true; } 645 646 protected: 647 virtual void EmitImpl(llvm::Serializer& S) const; 648 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 649 friend class Type; 650}; 651 652/// ReferenceType - C++ 8.3.2 - Reference Declarators. 653/// 654class ReferenceType : public PointerLikeType, public llvm::FoldingSetNode { 655 ReferenceType(QualType Referencee, QualType CanonicalRef) : 656 PointerLikeType(Reference, Referencee, CanonicalRef) { 657 } 658 friend class ASTContext; // ASTContext creates these. 659public: 660 virtual void getAsStringInternal(std::string &InnerString) const; 661 662 void Profile(llvm::FoldingSetNodeID &ID) { 663 Profile(ID, getPointeeType()); 664 } 665 static void Profile(llvm::FoldingSetNodeID &ID, QualType Referencee) { 666 ID.AddPointer(Referencee.getAsOpaquePtr()); 667 } 668 669 static bool classof(const Type *T) { return T->getTypeClass() == Reference; } 670 static bool classof(const ReferenceType *) { return true; } 671}; 672 673/// ArrayType - C99 6.7.5.2 - Array Declarators. 674/// 675class ArrayType : public Type, public llvm::FoldingSetNode { 676public: 677 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 678 /// an array with a static size (e.g. int X[static 4]), or with a star size 679 /// (e.g. int X[*]). 'static' is only allowed on function parameters. 680 enum ArraySizeModifier { 681 Normal, Static, Star 682 }; 683private: 684 /// ElementType - The element type of the array. 685 QualType ElementType; 686 687 // NOTE: VC++ treats enums as signed, avoid using the ArraySizeModifier enum 688 /// NOTE: These fields are packed into the bitfields space in the Type class. 689 unsigned SizeModifier : 2; 690 691 /// IndexTypeQuals - Capture qualifiers in declarations like: 692 /// 'int X[static restrict 4]'. For function parameters only. 693 unsigned IndexTypeQuals : 3; 694 695protected: 696 ArrayType(TypeClass tc, QualType et, QualType can, 697 ArraySizeModifier sm, unsigned tq) 698 : Type(tc, can), ElementType(et), SizeModifier(sm), IndexTypeQuals(tq) {} 699 friend class ASTContext; // ASTContext creates these. 700public: 701 QualType getElementType() const { return ElementType; } 702 ArraySizeModifier getSizeModifier() const { 703 return ArraySizeModifier(SizeModifier); 704 } 705 unsigned getIndexTypeQualifier() const { return IndexTypeQuals; } 706 707 static bool classof(const Type *T) { 708 return T->getTypeClass() == ConstantArray || 709 T->getTypeClass() == VariableArray || 710 T->getTypeClass() == IncompleteArray; 711 } 712 static bool classof(const ArrayType *) { return true; } 713}; 714 715/// ConstantArrayType - This class represents C arrays with a specified constant 716/// size. For example 'int A[100]' has ConstantArrayType where the element type 717/// is 'int' and the size is 100. 718class ConstantArrayType : public ArrayType { 719 llvm::APInt Size; // Allows us to unique the type. 720 721 ConstantArrayType(QualType et, QualType can, llvm::APInt sz, 722 ArraySizeModifier sm, unsigned tq) 723 : ArrayType(ConstantArray, et, can, sm, tq), Size(sz) {} 724 friend class ASTContext; // ASTContext creates these. 725public: 726 const llvm::APInt &getSize() const { return Size; } 727 virtual void getAsStringInternal(std::string &InnerString) const; 728 729 void Profile(llvm::FoldingSetNodeID &ID) { 730 Profile(ID, getElementType(), getSize()); 731 } 732 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 733 llvm::APInt ArraySize) { 734 ID.AddPointer(ET.getAsOpaquePtr()); 735 ID.AddInteger(ArraySize.getZExtValue()); 736 } 737 static bool classof(const Type *T) { 738 return T->getTypeClass() == ConstantArray; 739 } 740 static bool classof(const ConstantArrayType *) { return true; } 741 742protected: 743 virtual void EmitImpl(llvm::Serializer& S) const; 744 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 745 friend class Type; 746}; 747 748/// IncompleteArrayType - This class represents C arrays with an unspecified 749/// size. For example 'int A[]' has an IncompleteArrayType where the element 750/// type is 'int' and the size is unspecified. 751class IncompleteArrayType : public ArrayType { 752 IncompleteArrayType(QualType et, QualType can, 753 ArraySizeModifier sm, unsigned tq) 754 : ArrayType(IncompleteArray, et, can, sm, tq) {} 755 friend class ASTContext; // ASTContext creates these. 756public: 757 758 virtual void getAsStringInternal(std::string &InnerString) const; 759 760 static bool classof(const Type *T) { 761 return T->getTypeClass() == IncompleteArray; 762 } 763 static bool classof(const IncompleteArrayType *) { return true; } 764 765 friend class StmtIteratorBase; 766 767 void Profile(llvm::FoldingSetNodeID &ID) { 768 Profile(ID, getElementType()); 769 } 770 771 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET) { 772 ID.AddPointer(ET.getAsOpaquePtr()); 773 } 774 775protected: 776 virtual void EmitImpl(llvm::Serializer& S) const; 777 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 778 friend class Type; 779}; 780 781/// VariableArrayType - This class represents C arrays with a specified size 782/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 783/// Since the size expression is an arbitrary expression, we store it as such. 784/// 785/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 786/// should not be: two lexically equivalent variable array types could mean 787/// different things, for example, these variables do not have the same type 788/// dynamically: 789/// 790/// void foo(int x) { 791/// int Y[x]; 792/// ++x; 793/// int Z[x]; 794/// } 795/// 796class VariableArrayType : public ArrayType { 797 /// SizeExpr - An assignment expression. VLA's are only permitted within 798 /// a function block. 799 Stmt *SizeExpr; 800 801 VariableArrayType(QualType et, QualType can, Expr *e, 802 ArraySizeModifier sm, unsigned tq) 803 : ArrayType(VariableArray, et, can, sm, tq), SizeExpr((Stmt*) e) {} 804 friend class ASTContext; // ASTContext creates these. 805 virtual void Destroy(ASTContext& C); 806 807public: 808 Expr *getSizeExpr() const { 809 // We use C-style casts instead of cast<> here because we do not wish 810 // to have a dependency of Type.h on Stmt.h/Expr.h. 811 return (Expr*) SizeExpr; 812 } 813 814 virtual void getAsStringInternal(std::string &InnerString) const; 815 816 static bool classof(const Type *T) { 817 return T->getTypeClass() == VariableArray; 818 } 819 static bool classof(const VariableArrayType *) { return true; } 820 821 friend class StmtIteratorBase; 822 823 void Profile(llvm::FoldingSetNodeID &ID) { 824 assert (0 && "Cannnot unique VariableArrayTypes."); 825 } 826 827protected: 828 virtual void EmitImpl(llvm::Serializer& S) const; 829 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 830 friend class Type; 831}; 832 833/// VectorType - GCC generic vector type. This type is created using 834/// __attribute__((vector_size(n)), where "n" specifies the vector size in 835/// bytes. Since the constructor takes the number of vector elements, the 836/// client is responsible for converting the size into the number of elements. 837class VectorType : public Type, public llvm::FoldingSetNode { 838protected: 839 /// ElementType - The element type of the vector. 840 QualType ElementType; 841 842 /// NumElements - The number of elements in the vector. 843 unsigned NumElements; 844 845 VectorType(QualType vecType, unsigned nElements, QualType canonType) : 846 Type(Vector, canonType), ElementType(vecType), NumElements(nElements) {} 847 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 848 QualType canonType) : Type(tc, canonType), ElementType(vecType), 849 NumElements(nElements) {} 850 friend class ASTContext; // ASTContext creates these. 851public: 852 853 QualType getElementType() const { return ElementType; } 854 unsigned getNumElements() const { return NumElements; } 855 856 virtual void getAsStringInternal(std::string &InnerString) const; 857 858 void Profile(llvm::FoldingSetNodeID &ID) { 859 Profile(ID, getElementType(), getNumElements(), getTypeClass()); 860 } 861 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 862 unsigned NumElements, TypeClass TypeClass) { 863 ID.AddPointer(ElementType.getAsOpaquePtr()); 864 ID.AddInteger(NumElements); 865 ID.AddInteger(TypeClass); 866 } 867 static bool classof(const Type *T) { 868 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 869 } 870 static bool classof(const VectorType *) { return true; } 871}; 872 873/// ExtVectorType - Extended vector type. This type is created using 874/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 875/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 876/// class enables syntactic extensions, like Vector Components for accessing 877/// points, colors, and textures (modeled after OpenGL Shading Language). 878class ExtVectorType : public VectorType { 879 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 880 VectorType(ExtVector, vecType, nElements, canonType) {} 881 friend class ASTContext; // ASTContext creates these. 882public: 883 static int getPointAccessorIdx(char c) { 884 switch (c) { 885 default: return -1; 886 case 'x': return 0; 887 case 'y': return 1; 888 case 'z': return 2; 889 case 'w': return 3; 890 } 891 } 892 static int getColorAccessorIdx(char c) { 893 switch (c) { 894 default: return -1; 895 case 'r': return 0; 896 case 'g': return 1; 897 case 'b': return 2; 898 case 'a': return 3; 899 } 900 } 901 static int getTextureAccessorIdx(char c) { 902 switch (c) { 903 default: return -1; 904 case 's': return 0; 905 case 't': return 1; 906 case 'p': return 2; 907 case 'q': return 3; 908 } 909 }; 910 911 static int getAccessorIdx(char c) { 912 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 913 if (int idx = getColorAccessorIdx(c)+1) return idx-1; 914 return getTextureAccessorIdx(c); 915 } 916 917 bool isAccessorWithinNumElements(char c) const { 918 if (int idx = getAccessorIdx(c)+1) 919 return unsigned(idx-1) < NumElements; 920 return false; 921 } 922 virtual void getAsStringInternal(std::string &InnerString) const; 923 924 static bool classof(const Type *T) { 925 return T->getTypeClass() == ExtVector; 926 } 927 static bool classof(const ExtVectorType *) { return true; } 928}; 929 930/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 931/// class of FunctionTypeNoProto and FunctionTypeProto. 932/// 933class FunctionType : public Type { 934 /// SubClassData - This field is owned by the subclass, put here to pack 935 /// tightly with the ivars in Type. 936 bool SubClassData : 1; 937 938 // The type returned by the function. 939 QualType ResultType; 940protected: 941 FunctionType(TypeClass tc, QualType res, bool SubclassInfo,QualType Canonical) 942 : Type(tc, Canonical), SubClassData(SubclassInfo), ResultType(res) {} 943 bool getSubClassData() const { return SubClassData; } 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, 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, QualType Canonical) 991 : FunctionType(FunctionProto, Result, isVariadic, 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 1017 typedef const QualType *arg_type_iterator; 1018 arg_type_iterator arg_type_begin() const { 1019 return reinterpret_cast<const QualType *>(this+1); 1020 } 1021 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 1022 1023 virtual void getAsStringInternal(std::string &InnerString) const; 1024 1025 static bool classof(const Type *T) { 1026 return T->getTypeClass() == FunctionProto; 1027 } 1028 static bool classof(const FunctionTypeProto *) { return true; } 1029 1030 void Profile(llvm::FoldingSetNodeID &ID); 1031 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 1032 arg_type_iterator ArgTys, unsigned NumArgs, 1033 bool isVariadic); 1034 1035protected: 1036 virtual void EmitImpl(llvm::Serializer& S) const; 1037 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 1038 friend class Type; 1039}; 1040 1041 1042class TypedefType : public Type { 1043 TypedefDecl *Decl; 1044protected: 1045 TypedefType(TypeClass tc, TypedefDecl *D, QualType can) 1046 : Type(tc, can), Decl(D) { 1047 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1048 } 1049 friend class ASTContext; // ASTContext creates these. 1050public: 1051 1052 TypedefDecl *getDecl() const { return Decl; } 1053 1054 /// LookThroughTypedefs - Return the ultimate type this typedef corresponds to 1055 /// potentially looking through *all* consequtive typedefs. This returns the 1056 /// sum of the type qualifiers, so if you have: 1057 /// typedef const int A; 1058 /// typedef volatile A B; 1059 /// looking through the typedefs for B will give you "const volatile A". 1060 QualType LookThroughTypedefs() const; 1061 1062 virtual void getAsStringInternal(std::string &InnerString) const; 1063 1064 static bool classof(const Type *T) { return T->getTypeClass() == TypeName; } 1065 static bool classof(const TypedefType *) { return true; } 1066 1067protected: 1068 virtual void EmitImpl(llvm::Serializer& S) const; 1069 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 1070 friend class Type; 1071}; 1072 1073/// TypeOfExpr (GCC extension). 1074class TypeOfExpr : public Type { 1075 Expr *TOExpr; 1076 TypeOfExpr(Expr *E, QualType can) : Type(TypeOfExp, can), TOExpr(E) { 1077 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1078 } 1079 friend class ASTContext; // ASTContext creates these. 1080public: 1081 Expr *getUnderlyingExpr() const { return TOExpr; } 1082 1083 virtual void getAsStringInternal(std::string &InnerString) const; 1084 1085 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExp; } 1086 static bool classof(const TypeOfExpr *) { return true; } 1087}; 1088 1089/// TypeOfType (GCC extension). 1090class TypeOfType : public Type { 1091 QualType TOType; 1092 TypeOfType(QualType T, QualType can) : Type(TypeOfTyp, can), TOType(T) { 1093 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1094 } 1095 friend class ASTContext; // ASTContext creates these. 1096public: 1097 QualType getUnderlyingType() const { return TOType; } 1098 1099 virtual void getAsStringInternal(std::string &InnerString) const; 1100 1101 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfTyp; } 1102 static bool classof(const TypeOfType *) { return true; } 1103}; 1104 1105class TagType : public Type { 1106 TagDecl *decl; 1107 friend class ASTContext; 1108 1109protected: 1110 TagType(TagDecl *D, QualType can) : Type(Tagged, can), decl(D) {} 1111 1112public: 1113 TagDecl *getDecl() const { return decl; } 1114 1115 virtual void getAsStringInternal(std::string &InnerString) const; 1116 1117 static bool classof(const Type *T) { return T->getTypeClass() == Tagged; } 1118 static bool classof(const TagType *) { return true; } 1119 1120protected: 1121 virtual void EmitImpl(llvm::Serializer& S) const; 1122 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 1123 friend class Type; 1124}; 1125 1126/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 1127/// to detect TagType objects of structs/unions/classes. 1128class RecordType : public TagType { 1129protected: 1130 explicit RecordType(RecordDecl *D) 1131 : TagType(reinterpret_cast<TagDecl*>(D), QualType()) { } 1132 friend class ASTContext; // ASTContext creates these. 1133public: 1134 1135 RecordDecl *getDecl() const { 1136 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 1137 } 1138 1139 // FIXME: This predicate is a helper to QualType/Type. It needs to 1140 // recursively check all fields for const-ness. If any field is declared 1141 // const, it needs to return false. 1142 bool hasConstFields() const { return false; } 1143 1144 // FIXME: RecordType needs to check when it is created that all fields are in 1145 // the same address space, and return that. 1146 unsigned getAddressSpace() const { return 0; } 1147 1148 static bool classof(const TagType *T); 1149 static bool classof(const Type *T) { 1150 return isa<TagType>(T) && classof(cast<TagType>(T)); 1151 } 1152 static bool classof(const RecordType *) { return true; } 1153}; 1154 1155/// CXXRecordType - This is a helper class that allows the use of 1156/// isa/cast/dyncast to detect TagType objects of C++ structs/unions/classes. 1157class CXXRecordType : public RecordType { 1158 explicit CXXRecordType(CXXRecordDecl *D) 1159 : RecordType(reinterpret_cast<RecordDecl*>(D)) { } 1160 friend class ASTContext; // ASTContext creates these. 1161public: 1162 1163 CXXRecordDecl *getDecl() const { 1164 return reinterpret_cast<CXXRecordDecl*>(RecordType::getDecl()); 1165 } 1166 1167 static bool classof(const TagType *T); 1168 static bool classof(const Type *T) { 1169 return isa<TagType>(T) && classof(cast<TagType>(T)); 1170 } 1171 static bool classof(const CXXRecordType *) { return true; } 1172}; 1173 1174/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 1175/// to detect TagType objects of enums. 1176class EnumType : public TagType { 1177 explicit EnumType(EnumDecl *D) 1178 : TagType(reinterpret_cast<TagDecl*>(D), QualType()) { } 1179 friend class ASTContext; // ASTContext creates these. 1180public: 1181 1182 EnumDecl *getDecl() const { 1183 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 1184 } 1185 1186 static bool classof(const TagType *T); 1187 static bool classof(const Type *T) { 1188 return isa<TagType>(T) && classof(cast<TagType>(T)); 1189 } 1190 static bool classof(const EnumType *) { return true; } 1191}; 1192 1193 1194 1195/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 1196/// object oriented design. They basically correspond to C++ classes. There 1197/// are two kinds of interface types, normal interfaces like "NSString" and 1198/// qualified interfaces, which are qualified with a protocol list like 1199/// "NSString<NSCopyable, NSAmazing>". Qualified interface types are instances 1200/// of ObjCQualifiedInterfaceType, which is a subclass of ObjCInterfaceType. 1201class ObjCInterfaceType : public Type { 1202 ObjCInterfaceDecl *Decl; 1203protected: 1204 ObjCInterfaceType(TypeClass tc, ObjCInterfaceDecl *D) : 1205 Type(tc, QualType()), Decl(D) { } 1206 friend class ASTContext; // ASTContext creates these. 1207public: 1208 1209 ObjCInterfaceDecl *getDecl() const { return Decl; } 1210 1211 /// qual_iterator and friends: this provides access to the (potentially empty) 1212 /// list of protocols qualifying this interface. If this is an instance of 1213 /// ObjCQualifiedInterfaceType it returns the list, otherwise it returns an 1214 /// empty list if there are no qualifying protocols. 1215 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 1216 inline qual_iterator qual_begin() const; 1217 inline qual_iterator qual_end() const; 1218 bool qual_empty() const { return getTypeClass() != ObjCQualifiedInterface; } 1219 1220 /// getNumProtocols - Return the number of qualifying protocols in this 1221 /// interface type, or 0 if there are none. 1222 inline unsigned getNumProtocols() const; 1223 1224 /// getProtocol - Return the specified qualifying protocol. 1225 inline ObjCProtocolDecl *getProtocol(unsigned i) const; 1226 1227 1228 virtual void getAsStringInternal(std::string &InnerString) const; 1229 static bool classof(const Type *T) { 1230 return T->getTypeClass() == ObjCInterface || 1231 T->getTypeClass() == ObjCQualifiedInterface; 1232 } 1233 static bool classof(const ObjCInterfaceType *) { return true; } 1234}; 1235 1236/// ObjCQualifiedInterfaceType - This class represents interface types 1237/// conforming to a list of protocols, such as INTF<Proto1, Proto2, Proto1>. 1238/// 1239/// Duplicate protocols are removed and protocol list is canonicalized to be in 1240/// alphabetical order. 1241class ObjCQualifiedInterfaceType : public ObjCInterfaceType, 1242 public llvm::FoldingSetNode { 1243 1244 // List of protocols for this protocol conforming object type 1245 // List is sorted on protocol name. No protocol is enterred more than once. 1246 llvm::SmallVector<ObjCProtocolDecl*, 4> Protocols; 1247 1248 ObjCQualifiedInterfaceType(ObjCInterfaceDecl *D, 1249 ObjCProtocolDecl **Protos, unsigned NumP) : 1250 ObjCInterfaceType(ObjCQualifiedInterface, D), 1251 Protocols(Protos, Protos+NumP) { } 1252 friend class ASTContext; // ASTContext creates these. 1253public: 1254 1255 ObjCProtocolDecl *getProtocol(unsigned i) const { 1256 return Protocols[i]; 1257 } 1258 unsigned getNumProtocols() const { 1259 return Protocols.size(); 1260 } 1261 1262 qual_iterator qual_begin() const { return Protocols.begin(); } 1263 qual_iterator qual_end() const { return Protocols.end(); } 1264 1265 virtual void getAsStringInternal(std::string &InnerString) const; 1266 1267 void Profile(llvm::FoldingSetNodeID &ID); 1268 static void Profile(llvm::FoldingSetNodeID &ID, 1269 const ObjCInterfaceDecl *Decl, 1270 ObjCProtocolDecl **protocols, unsigned NumProtocols); 1271 1272 static bool classof(const Type *T) { 1273 return T->getTypeClass() == ObjCQualifiedInterface; 1274 } 1275 static bool classof(const ObjCQualifiedInterfaceType *) { return true; } 1276}; 1277 1278inline ObjCInterfaceType::qual_iterator ObjCInterfaceType::qual_begin() const { 1279 if (const ObjCQualifiedInterfaceType *QIT = 1280 dyn_cast<ObjCQualifiedInterfaceType>(this)) 1281 return QIT->qual_begin(); 1282 return 0; 1283} 1284inline ObjCInterfaceType::qual_iterator ObjCInterfaceType::qual_end() const { 1285 if (const ObjCQualifiedInterfaceType *QIT = 1286 dyn_cast<ObjCQualifiedInterfaceType>(this)) 1287 return QIT->qual_end(); 1288 return 0; 1289} 1290 1291/// getNumProtocols - Return the number of qualifying protocols in this 1292/// interface type, or 0 if there are none. 1293inline unsigned ObjCInterfaceType::getNumProtocols() const { 1294 if (const ObjCQualifiedInterfaceType *QIT = 1295 dyn_cast<ObjCQualifiedInterfaceType>(this)) 1296 return QIT->getNumProtocols(); 1297 return 0; 1298} 1299 1300/// getProtocol - Return the specified qualifying protocol. 1301inline ObjCProtocolDecl *ObjCInterfaceType::getProtocol(unsigned i) const { 1302 return cast<ObjCQualifiedInterfaceType>(this)->getProtocol(i); 1303} 1304 1305 1306 1307/// ObjCQualifiedIdType - to represent id<protocol-list>. 1308/// 1309/// Duplicate protocols are removed and protocol list is canonicalized to be in 1310/// alphabetical order. 1311class ObjCQualifiedIdType : public Type, 1312 public llvm::FoldingSetNode { 1313 // List of protocols for this protocol conforming 'id' type 1314 // List is sorted on protocol name. No protocol is enterred more than once. 1315 llvm::SmallVector<ObjCProtocolDecl*, 8> Protocols; 1316 1317 ObjCQualifiedIdType(ObjCProtocolDecl **Protos, unsigned NumP) 1318 : Type(ObjCQualifiedId, QualType()/*these are always canonical*/), 1319 Protocols(Protos, Protos+NumP) { } 1320 friend class ASTContext; // ASTContext creates these. 1321public: 1322 1323 ObjCProtocolDecl *getProtocols(unsigned i) const { 1324 return Protocols[i]; 1325 } 1326 unsigned getNumProtocols() const { 1327 return Protocols.size(); 1328 } 1329 ObjCProtocolDecl **getReferencedProtocols() { 1330 return &Protocols[0]; 1331 } 1332 1333 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 1334 qual_iterator qual_begin() const { return Protocols.begin(); } 1335 qual_iterator qual_end() const { return Protocols.end(); } 1336 1337 virtual void getAsStringInternal(std::string &InnerString) const; 1338 1339 void Profile(llvm::FoldingSetNodeID &ID); 1340 static void Profile(llvm::FoldingSetNodeID &ID, 1341 ObjCProtocolDecl **protocols, unsigned NumProtocols); 1342 1343 static bool classof(const Type *T) { 1344 return T->getTypeClass() == ObjCQualifiedId; 1345 } 1346 static bool classof(const ObjCQualifiedIdType *) { return true; } 1347 1348}; 1349 1350 1351// Inline function definitions. 1352 1353/// getUnqualifiedType - Return the type without any qualifiers. 1354inline QualType QualType::getUnqualifiedType() const { 1355 Type *TP = getTypePtr(); 1356 if (const ASQualType *ASQT = dyn_cast<ASQualType>(TP)) 1357 TP = ASQT->getBaseType(); 1358 return QualType(TP, 0); 1359} 1360 1361/// getAddressSpace - Return the address space of this type. 1362inline unsigned QualType::getAddressSpace() const { 1363 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 1364 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 1365 return AT->getElementType().getAddressSpace(); 1366 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 1367 return RT->getAddressSpace(); 1368 if (const ASQualType *ASQT = dyn_cast<ASQualType>(CT)) 1369 return ASQT->getAddressSpace(); 1370 return 0; 1371} 1372 1373inline const TypedefType* Type::getAsTypedefType() const { 1374 return dyn_cast<TypedefType>(this); 1375} 1376inline const ObjCInterfaceType *Type::getAsPointerToObjCInterfaceType() const { 1377 if (const PointerType *PT = getAsPointerType()) 1378 return PT->getPointeeType()->getAsObjCInterfaceType(); 1379 return 0; 1380} 1381 1382// NOTE: All of these methods use "getUnqualifiedType" to strip off address 1383// space qualifiers if present. 1384inline bool Type::isFunctionType() const { 1385 return isa<FunctionType>(CanonicalType.getUnqualifiedType()); 1386} 1387inline bool Type::isPointerType() const { 1388 return isa<PointerType>(CanonicalType.getUnqualifiedType()); 1389} 1390inline bool Type::isBlockPointerType() const { 1391 return isa<BlockPointerType>(CanonicalType); 1392} 1393inline bool Type::isReferenceType() const { 1394 return isa<ReferenceType>(CanonicalType.getUnqualifiedType()); 1395} 1396inline bool Type::isPointerLikeType() const { 1397 return isa<PointerLikeType>(CanonicalType.getUnqualifiedType()); 1398} 1399inline bool Type::isFunctionPointerType() const { 1400 if (const PointerType* T = getAsPointerType()) 1401 return T->getPointeeType()->isFunctionType(); 1402 else 1403 return false; 1404} 1405inline bool Type::isArrayType() const { 1406 return isa<ArrayType>(CanonicalType.getUnqualifiedType()); 1407} 1408inline bool Type::isConstantArrayType() const { 1409 return isa<ConstantArrayType>(CanonicalType.getUnqualifiedType()); 1410} 1411inline bool Type::isIncompleteArrayType() const { 1412 return isa<IncompleteArrayType>(CanonicalType.getUnqualifiedType()); 1413} 1414inline bool Type::isVariableArrayType() const { 1415 return isa<VariableArrayType>(CanonicalType.getUnqualifiedType()); 1416} 1417inline bool Type::isRecordType() const { 1418 return isa<RecordType>(CanonicalType.getUnqualifiedType()); 1419} 1420inline bool Type::isAnyComplexType() const { 1421 return isa<ComplexType>(CanonicalType.getUnqualifiedType()); 1422} 1423inline bool Type::isVectorType() const { 1424 return isa<VectorType>(CanonicalType.getUnqualifiedType()); 1425} 1426inline bool Type::isExtVectorType() const { 1427 return isa<ExtVectorType>(CanonicalType.getUnqualifiedType()); 1428} 1429inline bool Type::isObjCInterfaceType() const { 1430 return isa<ObjCInterfaceType>(CanonicalType.getUnqualifiedType()); 1431} 1432inline bool Type::isObjCQualifiedInterfaceType() const { 1433 return isa<ObjCQualifiedInterfaceType>(CanonicalType.getUnqualifiedType()); 1434} 1435inline bool Type::isObjCQualifiedIdType() const { 1436 return isa<ObjCQualifiedIdType>(CanonicalType.getUnqualifiedType()); 1437} 1438} // end namespace clang 1439 1440#endif 1441