Type.h revision 1b21c7ffe5fac1711fea35e4830159004a835c1a
1//===--- Type.h - C Language Family Type Representation ---------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Type interface and subclasses. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_CLANG_AST_TYPE_H 15#define LLVM_CLANG_AST_TYPE_H 16 17#include "clang/Basic/Diagnostic.h" 18#include "llvm/Support/Casting.h" 19#include "llvm/ADT/APSInt.h" 20#include "llvm/ADT/FoldingSet.h" 21#include "llvm/ADT/PointerIntPair.h" 22#include "llvm/Bitcode/SerializationFwd.h" 23using llvm::isa; 24using llvm::cast; 25using llvm::cast_or_null; 26using llvm::dyn_cast; 27using llvm::dyn_cast_or_null; 28 29namespace clang { 30 class ASTContext; 31 class Type; 32 class TypedefDecl; 33 class TemplateTypeParmDecl; 34 class TagDecl; 35 class RecordDecl; 36 class CXXRecordDecl; 37 class EnumDecl; 38 class FieldDecl; 39 class ObjCInterfaceDecl; 40 class ObjCProtocolDecl; 41 class ObjCMethodDecl; 42 class Expr; 43 class Stmt; 44 class SourceLocation; 45 class PointerLikeType; 46 class PointerType; 47 class BlockPointerType; 48 class ReferenceType; 49 class VectorType; 50 class ArrayType; 51 class ConstantArrayType; 52 class VariableArrayType; 53 class IncompleteArrayType; 54 class DependentSizedArrayType; 55 class RecordType; 56 class EnumType; 57 class ComplexType; 58 class TagType; 59 class TypedefType; 60 class TemplateTypeParmType; 61 class FunctionType; 62 class FunctionTypeProto; 63 class ExtVectorType; 64 class BuiltinType; 65 class ObjCInterfaceType; 66 class ObjCQualifiedIdType; 67 class ObjCQualifiedInterfaceType; 68 class StmtIteratorBase; 69 70/// QualType - For efficiency, we don't store CVR-qualified types as nodes on 71/// their own: instead each reference to a type stores the qualifiers. This 72/// greatly reduces the number of nodes we need to allocate for types (for 73/// example we only need one for 'int', 'const int', 'volatile int', 74/// 'const volatile int', etc). 75/// 76/// As an added efficiency bonus, instead of making this a pair, we just store 77/// the three bits we care about in the low bits of the pointer. To handle the 78/// packing/unpacking, we make QualType be a simple wrapper class that acts like 79/// a smart pointer. 80class QualType { 81 llvm::PointerIntPair<Type*, 3> Value; 82public: 83 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 84 Const = 0x1, 85 Restrict = 0x2, 86 Volatile = 0x4, 87 CVRFlags = Const|Restrict|Volatile 88 }; 89 90 QualType() {} 91 92 QualType(const Type *Ptr, unsigned Quals) 93 : Value(const_cast<Type*>(Ptr), Quals) {} 94 95 unsigned getCVRQualifiers() const { return Value.getInt(); } 96 Type *getTypePtr() const { return Value.getPointer(); } 97 98 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 99 static QualType getFromOpaquePtr(void *Ptr) { 100 QualType T; 101 T.Value.setFromOpaqueValue(Ptr); 102 return T; 103 } 104 105 Type &operator*() const { 106 return *getTypePtr(); 107 } 108 109 Type *operator->() const { 110 return getTypePtr(); 111 } 112 113 /// isNull - Return true if this QualType doesn't point to a type yet. 114 bool isNull() const { 115 return getTypePtr() == 0; 116 } 117 118 bool isConstQualified() const { 119 return (getCVRQualifiers() & Const) ? true : false; 120 } 121 bool isVolatileQualified() const { 122 return (getCVRQualifiers() & Volatile) ? true : false; 123 } 124 bool isRestrictQualified() const { 125 return (getCVRQualifiers() & Restrict) ? true : false; 126 } 127 128 bool isConstant(ASTContext& Ctx) const; 129 130 /// addConst/addVolatile/addRestrict - add the specified type qual to this 131 /// QualType. 132 void addConst() { Value.setInt(Value.getInt() | Const); } 133 void addVolatile() { Value.setInt(Value.getInt() | Volatile); } 134 void addRestrict() { Value.setInt(Value.getInt() | Restrict); } 135 136 void removeConst() { Value.setInt(Value.getInt() & ~Const); } 137 void removeVolatile() { Value.setInt(Value.getInt() & ~Volatile); } 138 void removeRestrict() { Value.setInt(Value.getInt() & ~Restrict); } 139 140 QualType getQualifiedType(unsigned TQs) const { 141 return QualType(getTypePtr(), TQs); 142 } 143 QualType getWithAdditionalQualifiers(unsigned TQs) const { 144 return QualType(getTypePtr(), TQs|getCVRQualifiers()); 145 } 146 147 QualType withConst() const { return getWithAdditionalQualifiers(Const); } 148 QualType withVolatile() const { return getWithAdditionalQualifiers(Volatile);} 149 QualType withRestrict() const { return getWithAdditionalQualifiers(Restrict);} 150 151 QualType getUnqualifiedType() const; 152 bool isMoreQualifiedThan(QualType Other) const; 153 bool isAtLeastAsQualifiedAs(QualType Other) const; 154 QualType getNonReferenceType() const; 155 156 157 /// operator==/!= - Indicate whether the specified types and qualifiers are 158 /// identical. 159 bool operator==(const QualType &RHS) const { 160 return Value == RHS.Value; 161 } 162 bool operator!=(const QualType &RHS) const { 163 return Value != RHS.Value; 164 } 165 std::string getAsString() const { 166 std::string S; 167 getAsStringInternal(S); 168 return S; 169 } 170 void getAsStringInternal(std::string &Str) const; 171 172 void dump(const char *s) const; 173 void dump() const; 174 175 void Profile(llvm::FoldingSetNodeID &ID) const { 176 ID.AddPointer(getAsOpaquePtr()); 177 } 178 179public: 180 181 /// getAddressSpace - Return the address space of this type. 182 inline unsigned getAddressSpace() const; 183 184 /// Emit - Serialize a QualType to Bitcode. 185 void Emit(llvm::Serializer& S) const; 186 187 /// Read - Deserialize a QualType from Bitcode. 188 static QualType ReadVal(llvm::Deserializer& D); 189 190 void ReadBackpatch(llvm::Deserializer& D); 191}; 192 193} // end clang. 194 195namespace llvm { 196/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 197/// to a specific Type class. 198template<> struct simplify_type<const ::clang::QualType> { 199 typedef ::clang::Type* SimpleType; 200 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 201 return Val.getTypePtr(); 202 } 203}; 204template<> struct simplify_type< ::clang::QualType> 205 : public simplify_type<const ::clang::QualType> {}; 206 207} // end namespace llvm 208 209namespace clang { 210 211/// Type - This is the base class of the type hierarchy. A central concept 212/// with types is that each type always has a canonical type. A canonical type 213/// is the type with any typedef names stripped out of it or the types it 214/// references. For example, consider: 215/// 216/// typedef int foo; 217/// typedef foo* bar; 218/// 'int *' 'foo *' 'bar' 219/// 220/// There will be a Type object created for 'int'. Since int is canonical, its 221/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 222/// TypeNameType). Its CanonicalType pointer points to the 'int' Type. Next 223/// there is a PointerType that represents 'int*', which, like 'int', is 224/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 225/// type is 'int*', and there is a TypeNameType for 'bar', whose canonical type 226/// is also 'int*'. 227/// 228/// Non-canonical types are useful for emitting diagnostics, without losing 229/// information about typedefs being used. Canonical types are useful for type 230/// comparisons (they allow by-pointer equality tests) and useful for reasoning 231/// about whether something has a particular form (e.g. is a function type), 232/// because they implicitly, recursively, strip all typedefs out of a type. 233/// 234/// Types, once created, are immutable. 235/// 236class Type { 237public: 238 enum TypeClass { 239 Builtin, Complex, Pointer, Reference, 240 ConstantArray, VariableArray, IncompleteArray, DependentSizedArray, 241 Vector, ExtVector, 242 FunctionNoProto, FunctionProto, 243 TypeName, Tagged, ASQual, 244 TemplateTypeParm, 245 ObjCInterface, ObjCQualifiedInterface, 246 ObjCQualifiedId, 247 TypeOfExp, TypeOfTyp, // GNU typeof extension. 248 BlockPointer // C extension 249 }; 250private: 251 QualType CanonicalType; 252 253 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 254 bool Dependent : 1; 255 256 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 257 /// Note that this should stay at the end of the ivars for Type so that 258 /// subclasses can pack their bitfields into the same word. 259 unsigned TC : 5; 260 261protected: 262 // silence VC++ warning C4355: 'this' : used in base member initializer list 263 Type *this_() { return this; } 264 Type(TypeClass tc, QualType Canonical, bool dependent) 265 : CanonicalType(Canonical.isNull() ? QualType(this_(), 0) : Canonical), 266 Dependent(dependent), TC(tc) {} 267 virtual ~Type() {} 268 virtual void Destroy(ASTContext& C); 269 friend class ASTContext; 270 271 void EmitTypeInternal(llvm::Serializer& S) const; 272 void ReadTypeInternal(llvm::Deserializer& D); 273 274public: 275 TypeClass getTypeClass() const { return static_cast<TypeClass>(TC); } 276 277 bool isCanonical() const { return CanonicalType.getTypePtr() == this; } 278 279 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 280 /// object types, function types, and incomplete types. 281 282 /// isObjectType - types that fully describe objects. An object is a region 283 /// of memory that can be examined and stored into (H&S). 284 bool isObjectType() const; 285 286 /// isIncompleteType - Return true if this is an incomplete type. 287 /// A type that can describe objects, but which lacks information needed to 288 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 289 /// routine will need to determine if the size is actually required. 290 bool isIncompleteType() const; 291 292 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 293 /// type, in other words, not a function type. 294 bool isIncompleteOrObjectType() const { 295 return !isFunctionType(); 296 } 297 298 /// isVariablyModifiedType (C99 6.7.5.2p2) - Return true for variable array 299 /// types that have a non-constant expression. This does not include "[]". 300 bool isVariablyModifiedType() const; 301 302 /// Helper methods to distinguish type categories. All type predicates 303 /// operate on the canonical type, ignoring typedefs and qualifiers. 304 305 /// isIntegerType() does *not* include complex integers (a GCC extension). 306 /// isComplexIntegerType() can be used to test for complex integers. 307 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 308 bool isEnumeralType() const; 309 bool isBooleanType() const; 310 bool isCharType() const; 311 bool isWideCharType() const; 312 bool isIntegralType() const; 313 314 /// Floating point categories. 315 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 316 /// isComplexType() does *not* include complex integers (a GCC extension). 317 /// isComplexIntegerType() can be used to test for complex integers. 318 bool isComplexType() const; // C99 6.2.5p11 (complex) 319 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 320 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 321 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 322 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 323 bool isVoidType() const; // C99 6.2.5p19 324 bool isDerivedType() const; // C99 6.2.5p20 325 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 326 bool isAggregateType() const; // C99 6.2.5p21 (arrays, structures) 327 328 // Type Predicates: Check to see if this type is structurally the specified 329 // type, ignoring typedefs and qualifiers. 330 bool isFunctionType() const; 331 bool isPointerLikeType() const; // Pointer or Reference. 332 bool isPointerType() const; 333 bool isBlockPointerType() const; 334 bool isReferenceType() const; 335 bool isFunctionPointerType() const; 336 bool isArrayType() const; 337 bool isConstantArrayType() const; 338 bool isIncompleteArrayType() const; 339 bool isVariableArrayType() const; 340 bool isDependentSizedArrayType() const; 341 bool isRecordType() const; 342 bool isClassType() const; 343 bool isStructureType() const; 344 bool isUnionType() const; 345 bool isComplexIntegerType() const; // GCC _Complex integer type. 346 bool isVectorType() const; // GCC vector type. 347 bool isExtVectorType() const; // Extended vector type. 348 bool isObjCInterfaceType() const; // NSString or NSString<foo> 349 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 350 bool isObjCQualifiedIdType() const; // id<foo> 351 bool isTemplateTypeParmType() const; // C++ template type parameter 352 353 /// isDependentType - Whether this type is a dependent type, meaning 354 /// that its definition somehow depends on a template parameter 355 /// (C++ [temp.dep.type]). 356 bool isDependentType() const { return Dependent; } 357 bool isOverloadType() const; // C++ overloaded function 358 359 // Type Checking Functions: Check to see if this type is structurally the 360 // specified type, ignoring typedefs and qualifiers, and return a pointer to 361 // the best type we can. 362 const BuiltinType *getAsBuiltinType() const; 363 const FunctionType *getAsFunctionType() const; 364 const FunctionTypeProto *getAsFunctionTypeProto() const; 365 const PointerLikeType *getAsPointerLikeType() const; // Pointer or Reference. 366 const PointerType *getAsPointerType() const; 367 const BlockPointerType *getAsBlockPointerType() const; 368 const ReferenceType *getAsReferenceType() const; 369 const RecordType *getAsRecordType() const; 370 const RecordType *getAsStructureType() const; 371 /// NOTE: getAs*ArrayType are methods on ASTContext. 372 const TypedefType *getAsTypedefType() const; 373 const RecordType *getAsUnionType() const; 374 const EnumType *getAsEnumType() const; 375 const VectorType *getAsVectorType() const; // GCC vector type. 376 const ComplexType *getAsComplexType() const; 377 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 378 const ExtVectorType *getAsExtVectorType() const; // Extended vector type. 379 const ObjCInterfaceType *getAsObjCInterfaceType() const; 380 const ObjCQualifiedInterfaceType *getAsObjCQualifiedInterfaceType() const; 381 const ObjCQualifiedIdType *getAsObjCQualifiedIdType() const; 382 const TemplateTypeParmType *getAsTemplateTypeParmType() const; 383 384 /// getAsPointerToObjCInterfaceType - If this is a pointer to an ObjC 385 /// interface, return the interface type, otherwise return null. 386 const ObjCInterfaceType *getAsPointerToObjCInterfaceType() const; 387 388 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 389 /// element type of the array, potentially with type qualifiers missing. 390 /// This method should never be used when type qualifiers are meaningful. 391 const Type *getArrayElementTypeNoTypeQual() const; 392 393 394 395 /// getDesugaredType - Return the specified type with any "sugar" removed from 396 /// the type. This takes off typedefs, typeof's etc. If the outer level of 397 /// the type is already concrete, it returns it unmodified. This is similar 398 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 399 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 400 /// concrete. 401 QualType getDesugaredType() const; 402 403 /// More type predicates useful for type checking/promotion 404 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 405 406 /// isSignedIntegerType - Return true if this is an integer type that is 407 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 408 /// an enum decl which has a signed representation, or a vector of signed 409 /// integer element type. 410 bool isSignedIntegerType() const; 411 412 /// isUnsignedIntegerType - Return true if this is an integer type that is 413 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 414 /// decl which has an unsigned representation, or a vector of unsigned integer 415 /// element type. 416 bool isUnsignedIntegerType() const; 417 418 /// isConstantSizeType - Return true if this is not a variable sized type, 419 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 420 /// incomplete types. 421 bool isConstantSizeType() const; 422 423 QualType getCanonicalTypeInternal() const { return CanonicalType; } 424 void dump() const; 425 virtual void getAsStringInternal(std::string &InnerString) const = 0; 426 static bool classof(const Type *) { return true; } 427 428protected: 429 /// Emit - Emit a Type to bitcode. Used by ASTContext. 430 void Emit(llvm::Serializer& S) const; 431 432 /// Create - Construct a Type from bitcode. Used by ASTContext. 433 static void Create(ASTContext& Context, unsigned i, llvm::Deserializer& S); 434 435 /// EmitImpl - Subclasses must implement this method in order to 436 /// be serialized. 437 // FIXME: Make this abstract once implemented. 438 virtual void EmitImpl(llvm::Serializer& S) const { 439 assert (false && "Serializization for type not supported."); 440 } 441}; 442 443/// ASQualType - TR18037 (C embedded extensions) 6.2.5p26 444/// This supports address space qualified types. 445/// 446class ASQualType : public Type, public llvm::FoldingSetNode { 447 /// BaseType - This is the underlying type that this qualifies. All CVR 448 /// qualifiers are stored on the QualType that references this type, so we 449 /// can't have any here. 450 Type *BaseType; 451 /// Address Space ID - The address space ID this type is qualified with. 452 unsigned AddressSpace; 453 ASQualType(Type *Base, QualType CanonicalPtr, unsigned AddrSpace) : 454 Type(ASQual, CanonicalPtr, Base->isDependentType()), BaseType(Base), 455 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 Dependent // This represents the type of a type-dependent expression. 510 }; 511private: 512 Kind TypeKind; 513public: 514 BuiltinType(Kind K) 515 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent)), 516 TypeKind(K) {} 517 518 Kind getKind() const { return TypeKind; } 519 const char *getName() const; 520 521 virtual void getAsStringInternal(std::string &InnerString) const; 522 523 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 524 static bool classof(const BuiltinType *) { return true; } 525}; 526 527/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 528/// types (_Complex float etc) as well as the GCC integer complex extensions. 529/// 530class ComplexType : public Type, public llvm::FoldingSetNode { 531 QualType ElementType; 532 ComplexType(QualType Element, QualType CanonicalPtr) : 533 Type(Complex, CanonicalPtr, Element->isDependentType()), 534 ElementType(Element) { 535 } 536 friend class ASTContext; // ASTContext creates these. 537public: 538 QualType getElementType() const { return ElementType; } 539 540 virtual void getAsStringInternal(std::string &InnerString) const; 541 542 void Profile(llvm::FoldingSetNodeID &ID) { 543 Profile(ID, getElementType()); 544 } 545 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 546 ID.AddPointer(Element.getAsOpaquePtr()); 547 } 548 549 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 550 static bool classof(const ComplexType *) { return true; } 551 552protected: 553 virtual void EmitImpl(llvm::Serializer& S) const; 554 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 555 friend class Type; 556}; 557 558/// PointerLikeType - Common base class for pointers and references. 559/// FIXME: Add more documentation on this classes design point. For example, 560/// should BlockPointerType inherit from it? Is the concept of a PointerLikeType 561/// in the C++ standard? 562/// 563class PointerLikeType : public Type { 564 QualType PointeeType; 565protected: 566 PointerLikeType(TypeClass K, QualType Pointee, QualType CanonicalPtr) : 567 Type(K, CanonicalPtr, Pointee->isDependentType()), PointeeType(Pointee) { 568 } 569public: 570 571 QualType getPointeeType() const { return PointeeType; } 572 573 static bool classof(const Type *T) { 574 return T->getTypeClass() == Pointer || T->getTypeClass() == Reference; 575 } 576 static bool classof(const PointerLikeType *) { return true; } 577}; 578 579/// PointerType - C99 6.7.5.1 - Pointer Declarators. 580/// 581class PointerType : public PointerLikeType, public llvm::FoldingSetNode { 582 PointerType(QualType Pointee, QualType CanonicalPtr) : 583 PointerLikeType(Pointer, Pointee, CanonicalPtr) { 584 } 585 friend class ASTContext; // ASTContext creates these. 586public: 587 588 virtual void getAsStringInternal(std::string &InnerString) const; 589 590 void Profile(llvm::FoldingSetNodeID &ID) { 591 Profile(ID, getPointeeType()); 592 } 593 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 594 ID.AddPointer(Pointee.getAsOpaquePtr()); 595 } 596 597 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 598 static bool classof(const PointerType *) { return true; } 599 600protected: 601 virtual void EmitImpl(llvm::Serializer& S) const; 602 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 603 friend class Type; 604}; 605 606/// BlockPointerType - pointer to a block type. 607/// This type is to represent types syntactically represented as 608/// "void (^)(int)", etc. Pointee is required to always be a function type. 609/// FIXME: Should BlockPointerType inherit from PointerLikeType? It could 610/// simplfy some type checking code, however PointerLikeType doesn't appear 611/// to be used by the type checker. 612/// 613class BlockPointerType : public Type, public llvm::FoldingSetNode { 614 QualType PointeeType; // Block is some kind of pointer type 615 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 616 Type(BlockPointer, CanonicalCls, Pointee->isDependentType()), 617 PointeeType(Pointee) { 618 } 619 friend class ASTContext; // ASTContext creates these. 620public: 621 622 // Get the pointee type. Pointee is required to always be a function type. 623 QualType getPointeeType() const { return PointeeType; } 624 625 virtual void getAsStringInternal(std::string &InnerString) const; 626 627 void Profile(llvm::FoldingSetNodeID &ID) { 628 Profile(ID, getPointeeType()); 629 } 630 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 631 ID.AddPointer(Pointee.getAsOpaquePtr()); 632 } 633 634 static bool classof(const Type *T) { 635 return T->getTypeClass() == BlockPointer; 636 } 637 static bool classof(const BlockPointerType *) { return true; } 638 639 protected: 640 virtual void EmitImpl(llvm::Serializer& S) const; 641 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 642 friend class Type; 643}; 644 645/// ReferenceType - C++ 8.3.2 - Reference Declarators. 646/// 647class ReferenceType : public PointerLikeType, public llvm::FoldingSetNode { 648 ReferenceType(QualType Referencee, QualType CanonicalRef) : 649 PointerLikeType(Reference, Referencee, CanonicalRef) { 650 } 651 friend class ASTContext; // ASTContext creates these. 652public: 653 virtual void getAsStringInternal(std::string &InnerString) const; 654 655 void Profile(llvm::FoldingSetNodeID &ID) { 656 Profile(ID, getPointeeType()); 657 } 658 static void Profile(llvm::FoldingSetNodeID &ID, QualType Referencee) { 659 ID.AddPointer(Referencee.getAsOpaquePtr()); 660 } 661 662 static bool classof(const Type *T) { return T->getTypeClass() == Reference; } 663 static bool classof(const ReferenceType *) { return true; } 664}; 665 666/// ArrayType - C99 6.7.5.2 - Array Declarators. 667/// 668class ArrayType : public Type, public llvm::FoldingSetNode { 669public: 670 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 671 /// an array with a static size (e.g. int X[static 4]), or an array 672 /// with a star size (e.g. int X[*]). 673 /// 'static' is only allowed on function parameters. 674 enum ArraySizeModifier { 675 Normal, Static, Star 676 }; 677private: 678 /// ElementType - The element type of the array. 679 QualType ElementType; 680 681 // NOTE: VC++ treats enums as signed, avoid using the ArraySizeModifier enum 682 /// NOTE: These fields are packed into the bitfields space in the Type class. 683 unsigned SizeModifier : 2; 684 685 /// IndexTypeQuals - Capture qualifiers in declarations like: 686 /// 'int X[static restrict 4]'. For function parameters only. 687 unsigned IndexTypeQuals : 3; 688 689protected: 690 // C++ [temp.dep.type]p1: 691 // A type is dependent if it is... 692 // - an array type constructed from any dependent type or whose 693 // size is specified by a constant expression that is 694 // value-dependent, 695 ArrayType(TypeClass tc, QualType et, QualType can, 696 ArraySizeModifier sm, unsigned tq) 697 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray), 698 ElementType(et), SizeModifier(sm), IndexTypeQuals(tq) {} 699 700 friend class ASTContext; // ASTContext creates these. 701public: 702 QualType getElementType() const { return ElementType; } 703 ArraySizeModifier getSizeModifier() const { 704 return ArraySizeModifier(SizeModifier); 705 } 706 unsigned getIndexTypeQualifier() const { return IndexTypeQuals; } 707 708 static bool classof(const Type *T) { 709 return T->getTypeClass() == ConstantArray || 710 T->getTypeClass() == VariableArray || 711 T->getTypeClass() == IncompleteArray || 712 T->getTypeClass() == DependentSizedArray; 713 } 714 static bool classof(const ArrayType *) { return true; } 715}; 716 717/// ConstantArrayType - This class represents C arrays with a specified constant 718/// size. For example 'int A[100]' has ConstantArrayType where the element type 719/// is 'int' and the size is 100. 720class ConstantArrayType : public ArrayType { 721 llvm::APInt Size; // Allows us to unique the type. 722 723 ConstantArrayType(QualType et, QualType can, llvm::APInt sz, 724 ArraySizeModifier sm, unsigned tq) 725 : ArrayType(ConstantArray, et, can, sm, tq), Size(sz) {} 726 friend class ASTContext; // ASTContext creates these. 727public: 728 const llvm::APInt &getSize() const { return Size; } 729 virtual void getAsStringInternal(std::string &InnerString) const; 730 731 void Profile(llvm::FoldingSetNodeID &ID) { 732 Profile(ID, getElementType(), getSize()); 733 } 734 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 735 llvm::APInt ArraySize) { 736 ID.AddPointer(ET.getAsOpaquePtr()); 737 ID.AddInteger(ArraySize.getZExtValue()); 738 } 739 static bool classof(const Type *T) { 740 return T->getTypeClass() == ConstantArray; 741 } 742 static bool classof(const ConstantArrayType *) { return true; } 743 744protected: 745 virtual void EmitImpl(llvm::Serializer& S) const; 746 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 747 friend class Type; 748}; 749 750/// IncompleteArrayType - This class represents C arrays with an unspecified 751/// size. For example 'int A[]' has an IncompleteArrayType where the element 752/// type is 'int' and the size is unspecified. 753class IncompleteArrayType : public ArrayType { 754 IncompleteArrayType(QualType et, QualType can, 755 ArraySizeModifier sm, unsigned tq) 756 : ArrayType(IncompleteArray, et, can, sm, tq) {} 757 friend class ASTContext; // ASTContext creates these. 758public: 759 760 virtual void getAsStringInternal(std::string &InnerString) const; 761 762 static bool classof(const Type *T) { 763 return T->getTypeClass() == IncompleteArray; 764 } 765 static bool classof(const IncompleteArrayType *) { return true; } 766 767 friend class StmtIteratorBase; 768 769 void Profile(llvm::FoldingSetNodeID &ID) { 770 Profile(ID, getElementType()); 771 } 772 773 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET) { 774 ID.AddPointer(ET.getAsOpaquePtr()); 775 } 776 777protected: 778 virtual void EmitImpl(llvm::Serializer& S) const; 779 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 780 friend class Type; 781}; 782 783/// VariableArrayType - This class represents C arrays with a specified size 784/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 785/// Since the size expression is an arbitrary expression, we store it as such. 786/// 787/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 788/// should not be: two lexically equivalent variable array types could mean 789/// different things, for example, these variables do not have the same type 790/// dynamically: 791/// 792/// void foo(int x) { 793/// int Y[x]; 794/// ++x; 795/// int Z[x]; 796/// } 797/// 798class VariableArrayType : public ArrayType { 799 /// SizeExpr - An assignment expression. VLA's are only permitted within 800 /// a function block. 801 Stmt *SizeExpr; 802 803 VariableArrayType(QualType et, QualType can, Expr *e, 804 ArraySizeModifier sm, unsigned tq) 805 : ArrayType(VariableArray, et, can, sm, tq), SizeExpr((Stmt*) e) {} 806 friend class ASTContext; // ASTContext creates these. 807 virtual void Destroy(ASTContext& C); 808 809public: 810 Expr *getSizeExpr() const { 811 // We use C-style casts instead of cast<> here because we do not wish 812 // to have a dependency of Type.h on Stmt.h/Expr.h. 813 return (Expr*) SizeExpr; 814 } 815 816 virtual void getAsStringInternal(std::string &InnerString) const; 817 818 static bool classof(const Type *T) { 819 return T->getTypeClass() == VariableArray; 820 } 821 static bool classof(const VariableArrayType *) { return true; } 822 823 friend class StmtIteratorBase; 824 825 void Profile(llvm::FoldingSetNodeID &ID) { 826 assert (0 && "Cannnot unique VariableArrayTypes."); 827 } 828 829protected: 830 virtual void EmitImpl(llvm::Serializer& S) const; 831 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 832 friend class Type; 833}; 834 835/// DependentSizedArrayType - This type represents an array type in 836/// C++ whose size is a value-dependent expression. For example: 837/// @code 838/// template<typename T, int Size> 839/// class array { 840/// T data[Size]; 841/// }; 842/// @endcode 843/// For these types, we won't actually know what the array bound is 844/// until template instantiation occurs, at which point this will 845/// become either a ConstantArrayType or a VariableArrayType. 846class DependentSizedArrayType : public ArrayType { 847 /// SizeExpr - An assignment expression that will instantiate to the 848 /// size of the array. 849 Stmt *SizeExpr; 850 851 DependentSizedArrayType(QualType et, QualType can, Expr *e, 852 ArraySizeModifier sm, unsigned tq) 853 : ArrayType(DependentSizedArray, et, can, sm, tq), SizeExpr((Stmt*) e) {} 854 friend class ASTContext; // ASTContext creates these. 855 virtual void Destroy(ASTContext& C); 856 857public: 858 Expr *getSizeExpr() const { 859 // We use C-style casts instead of cast<> here because we do not wish 860 // to have a dependency of Type.h on Stmt.h/Expr.h. 861 return (Expr*) SizeExpr; 862 } 863 864 virtual void getAsStringInternal(std::string &InnerString) const; 865 866 static bool classof(const Type *T) { 867 return T->getTypeClass() == DependentSizedArray; 868 } 869 static bool classof(const DependentSizedArrayType *) { return true; } 870 871 friend class StmtIteratorBase; 872 873 void Profile(llvm::FoldingSetNodeID &ID) { 874 assert (0 && "Cannnot unique DependentSizedArrayTypes."); 875 } 876 877protected: 878 virtual void EmitImpl(llvm::Serializer& S) const; 879 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 880 friend class Type; 881}; 882 883/// VectorType - GCC generic vector type. This type is created using 884/// __attribute__((vector_size(n)), where "n" specifies the vector size in 885/// bytes. Since the constructor takes the number of vector elements, the 886/// client is responsible for converting the size into the number of elements. 887class VectorType : public Type, public llvm::FoldingSetNode { 888protected: 889 /// ElementType - The element type of the vector. 890 QualType ElementType; 891 892 /// NumElements - The number of elements in the vector. 893 unsigned NumElements; 894 895 VectorType(QualType vecType, unsigned nElements, QualType canonType) : 896 Type(Vector, canonType, vecType->isDependentType()), 897 ElementType(vecType), NumElements(nElements) {} 898 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 899 QualType canonType) 900 : Type(tc, canonType, vecType->isDependentType()), ElementType(vecType), 901 NumElements(nElements) {} 902 friend class ASTContext; // ASTContext creates these. 903public: 904 905 QualType getElementType() const { return ElementType; } 906 unsigned getNumElements() const { return NumElements; } 907 908 virtual void getAsStringInternal(std::string &InnerString) const; 909 910 void Profile(llvm::FoldingSetNodeID &ID) { 911 Profile(ID, getElementType(), getNumElements(), getTypeClass()); 912 } 913 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 914 unsigned NumElements, TypeClass TypeClass) { 915 ID.AddPointer(ElementType.getAsOpaquePtr()); 916 ID.AddInteger(NumElements); 917 ID.AddInteger(TypeClass); 918 } 919 static bool classof(const Type *T) { 920 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 921 } 922 static bool classof(const VectorType *) { return true; } 923}; 924 925/// ExtVectorType - Extended vector type. This type is created using 926/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 927/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 928/// class enables syntactic extensions, like Vector Components for accessing 929/// points, colors, and textures (modeled after OpenGL Shading Language). 930class ExtVectorType : public VectorType { 931 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 932 VectorType(ExtVector, vecType, nElements, canonType) {} 933 friend class ASTContext; // ASTContext creates these. 934public: 935 static int getPointAccessorIdx(char c) { 936 switch (c) { 937 default: return -1; 938 case 'x': return 0; 939 case 'y': return 1; 940 case 'z': return 2; 941 case 'w': return 3; 942 } 943 } 944 static int getColorAccessorIdx(char c) { 945 switch (c) { 946 default: return -1; 947 case 'r': return 0; 948 case 'g': return 1; 949 case 'b': return 2; 950 case 'a': return 3; 951 } 952 } 953 static int getTextureAccessorIdx(char c) { 954 switch (c) { 955 default: return -1; 956 case 's': return 0; 957 case 't': return 1; 958 case 'p': return 2; 959 case 'q': return 3; 960 } 961 }; 962 963 static int getAccessorIdx(char c) { 964 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 965 if (int idx = getColorAccessorIdx(c)+1) return idx-1; 966 return getTextureAccessorIdx(c); 967 } 968 969 bool isAccessorWithinNumElements(char c) const { 970 if (int idx = getAccessorIdx(c)+1) 971 return unsigned(idx-1) < NumElements; 972 return false; 973 } 974 virtual void getAsStringInternal(std::string &InnerString) const; 975 976 static bool classof(const Type *T) { 977 return T->getTypeClass() == ExtVector; 978 } 979 static bool classof(const ExtVectorType *) { return true; } 980}; 981 982/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 983/// class of FunctionTypeNoProto and FunctionTypeProto. 984/// 985class FunctionType : public Type { 986 /// SubClassData - This field is owned by the subclass, put here to pack 987 /// tightly with the ivars in Type. 988 bool SubClassData : 1; 989 990 /// TypeQuals - Used only by FunctionTypeProto, put here to pack with the 991 /// other bitfields. 992 /// The qualifiers are part of FunctionTypeProto because... 993 /// 994 /// C++ 8.3.5p4: The return type, the parameter type list and the 995 /// cv-qualifier-seq, [...], are part of the function type. 996 /// 997 unsigned TypeQuals : 3; 998 999 // The type returned by the function. 1000 QualType ResultType; 1001protected: 1002 FunctionType(TypeClass tc, QualType res, bool SubclassInfo, 1003 unsigned typeQuals, QualType Canonical, bool Dependent) 1004 : Type(tc, Canonical, Dependent), 1005 SubClassData(SubclassInfo), TypeQuals(typeQuals), ResultType(res) {} 1006 bool getSubClassData() const { return SubClassData; } 1007 unsigned getTypeQuals() const { return TypeQuals; } 1008public: 1009 1010 QualType getResultType() const { return ResultType; } 1011 1012 1013 static bool classof(const Type *T) { 1014 return T->getTypeClass() == FunctionNoProto || 1015 T->getTypeClass() == FunctionProto; 1016 } 1017 static bool classof(const FunctionType *) { return true; } 1018}; 1019 1020/// FunctionTypeNoProto - Represents a K&R-style 'int foo()' function, which has 1021/// no information available about its arguments. 1022class FunctionTypeNoProto : public FunctionType, public llvm::FoldingSetNode { 1023 FunctionTypeNoProto(QualType Result, QualType Canonical) 1024 : FunctionType(FunctionNoProto, Result, false, 0, Canonical, 1025 /*Dependent=*/false) {} 1026 friend class ASTContext; // ASTContext creates these. 1027public: 1028 // No additional state past what FunctionType provides. 1029 1030 virtual void getAsStringInternal(std::string &InnerString) const; 1031 1032 void Profile(llvm::FoldingSetNodeID &ID) { 1033 Profile(ID, getResultType()); 1034 } 1035 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType) { 1036 ID.AddPointer(ResultType.getAsOpaquePtr()); 1037 } 1038 1039 static bool classof(const Type *T) { 1040 return T->getTypeClass() == FunctionNoProto; 1041 } 1042 static bool classof(const FunctionTypeNoProto *) { return true; } 1043 1044protected: 1045 virtual void EmitImpl(llvm::Serializer& S) const; 1046 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 1047 friend class Type; 1048}; 1049 1050/// FunctionTypeProto - Represents a prototype with argument type info, e.g. 1051/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 1052/// arguments, not as having a single void argument. 1053class FunctionTypeProto : public FunctionType, public llvm::FoldingSetNode { 1054 /// hasAnyDependentType - Determine whether there are any dependent 1055 /// types within the arguments passed in. 1056 static bool hasAnyDependentType(const QualType *ArgArray, unsigned numArgs) { 1057 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 1058 if (ArgArray[Idx]->isDependentType()) 1059 return true; 1060 1061 return false; 1062 } 1063 1064 FunctionTypeProto(QualType Result, const QualType *ArgArray, unsigned numArgs, 1065 bool isVariadic, unsigned typeQuals, QualType Canonical) 1066 : FunctionType(FunctionProto, Result, isVariadic, typeQuals, Canonical, 1067 (Result->isDependentType() || 1068 hasAnyDependentType(ArgArray, numArgs))), 1069 NumArgs(numArgs) { 1070 // Fill in the trailing argument array. 1071 QualType *ArgInfo = reinterpret_cast<QualType *>(this+1);; 1072 for (unsigned i = 0; i != numArgs; ++i) 1073 ArgInfo[i] = ArgArray[i]; 1074 } 1075 1076 /// NumArgs - The number of arguments this function has, not counting '...'. 1077 unsigned NumArgs; 1078 1079 /// ArgInfo - There is an variable size array after the class in memory that 1080 /// holds the argument types. 1081 1082 friend class ASTContext; // ASTContext creates these. 1083 virtual void Destroy(ASTContext& C); 1084 1085public: 1086 unsigned getNumArgs() const { return NumArgs; } 1087 QualType getArgType(unsigned i) const { 1088 assert(i < NumArgs && "Invalid argument number!"); 1089 return arg_type_begin()[i]; 1090 } 1091 1092 bool isVariadic() const { return getSubClassData(); } 1093 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 1094 1095 typedef const QualType *arg_type_iterator; 1096 arg_type_iterator arg_type_begin() const { 1097 return reinterpret_cast<const QualType *>(this+1); 1098 } 1099 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 1100 1101 virtual void getAsStringInternal(std::string &InnerString) const; 1102 1103 static bool classof(const Type *T) { 1104 return T->getTypeClass() == FunctionProto; 1105 } 1106 static bool classof(const FunctionTypeProto *) { return true; } 1107 1108 void Profile(llvm::FoldingSetNodeID &ID); 1109 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 1110 arg_type_iterator ArgTys, unsigned NumArgs, 1111 bool isVariadic, unsigned TypeQuals); 1112 1113protected: 1114 virtual void EmitImpl(llvm::Serializer& S) const; 1115 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 1116 friend class Type; 1117}; 1118 1119 1120class TypedefType : public Type { 1121 TypedefDecl *Decl; 1122protected: 1123 TypedefType(TypeClass tc, TypedefDecl *D, QualType can) 1124 : Type(tc, can, can->isDependentType()), Decl(D) { 1125 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1126 } 1127 friend class ASTContext; // ASTContext creates these. 1128public: 1129 1130 TypedefDecl *getDecl() const { return Decl; } 1131 1132 /// LookThroughTypedefs - Return the ultimate type this typedef corresponds to 1133 /// potentially looking through *all* consequtive typedefs. This returns the 1134 /// sum of the type qualifiers, so if you have: 1135 /// typedef const int A; 1136 /// typedef volatile A B; 1137 /// looking through the typedefs for B will give you "const volatile A". 1138 QualType LookThroughTypedefs() const; 1139 1140 virtual void getAsStringInternal(std::string &InnerString) const; 1141 1142 static bool classof(const Type *T) { return T->getTypeClass() == TypeName; } 1143 static bool classof(const TypedefType *) { return true; } 1144 1145protected: 1146 virtual void EmitImpl(llvm::Serializer& S) const; 1147 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 1148 friend class Type; 1149}; 1150 1151/// TypeOfExpr (GCC extension). 1152class TypeOfExpr : public Type { 1153 Expr *TOExpr; 1154 TypeOfExpr(Expr *E, QualType can); 1155 friend class ASTContext; // ASTContext creates these. 1156public: 1157 Expr *getUnderlyingExpr() const { return TOExpr; } 1158 1159 virtual void getAsStringInternal(std::string &InnerString) const; 1160 1161 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExp; } 1162 static bool classof(const TypeOfExpr *) { return true; } 1163}; 1164 1165/// TypeOfType (GCC extension). 1166class TypeOfType : public Type { 1167 QualType TOType; 1168 TypeOfType(QualType T, QualType can) 1169 : Type(TypeOfTyp, can, T->isDependentType()), TOType(T) { 1170 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1171 } 1172 friend class ASTContext; // ASTContext creates these. 1173public: 1174 QualType getUnderlyingType() const { return TOType; } 1175 1176 virtual void getAsStringInternal(std::string &InnerString) const; 1177 1178 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfTyp; } 1179 static bool classof(const TypeOfType *) { return true; } 1180}; 1181 1182class TagType : public Type { 1183 TagDecl *decl; 1184 friend class ASTContext; 1185 1186protected: 1187 // FIXME: We'll need the user to pass in information about whether 1188 // this type is dependent or not, because we don't have enough 1189 // information to compute it here. 1190 TagType(TagDecl *D, QualType can) 1191 : Type(Tagged, can, /*Dependent=*/false), decl(D) {} 1192 1193public: 1194 TagDecl *getDecl() const { return decl; } 1195 1196 virtual void getAsStringInternal(std::string &InnerString) const; 1197 1198 static bool classof(const Type *T) { return T->getTypeClass() == Tagged; } 1199 static bool classof(const TagType *) { return true; } 1200 1201protected: 1202 virtual void EmitImpl(llvm::Serializer& S) const; 1203 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 1204 friend class Type; 1205}; 1206 1207/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 1208/// to detect TagType objects of structs/unions/classes. 1209class RecordType : public TagType { 1210protected: 1211 explicit RecordType(RecordDecl *D) 1212 : TagType(reinterpret_cast<TagDecl*>(D), QualType()) { } 1213 friend class ASTContext; // ASTContext creates these. 1214public: 1215 1216 RecordDecl *getDecl() const { 1217 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 1218 } 1219 1220 // FIXME: This predicate is a helper to QualType/Type. It needs to 1221 // recursively check all fields for const-ness. If any field is declared 1222 // const, it needs to return false. 1223 bool hasConstFields() const { return false; } 1224 1225 // FIXME: RecordType needs to check when it is created that all fields are in 1226 // the same address space, and return that. 1227 unsigned getAddressSpace() const { return 0; } 1228 1229 static bool classof(const TagType *T); 1230 static bool classof(const Type *T) { 1231 return isa<TagType>(T) && classof(cast<TagType>(T)); 1232 } 1233 static bool classof(const RecordType *) { return true; } 1234}; 1235 1236/// CXXRecordType - This is a helper class that allows the use of 1237/// isa/cast/dyncast to detect TagType objects of C++ structs/unions/classes. 1238class CXXRecordType : public RecordType { 1239 explicit CXXRecordType(CXXRecordDecl *D) 1240 : RecordType(reinterpret_cast<RecordDecl*>(D)) { } 1241 friend class ASTContext; // ASTContext creates these. 1242public: 1243 1244 CXXRecordDecl *getDecl() const { 1245 return reinterpret_cast<CXXRecordDecl*>(RecordType::getDecl()); 1246 } 1247 1248 static bool classof(const TagType *T); 1249 static bool classof(const Type *T) { 1250 return isa<TagType>(T) && classof(cast<TagType>(T)); 1251 } 1252 static bool classof(const CXXRecordType *) { return true; } 1253}; 1254 1255/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 1256/// to detect TagType objects of enums. 1257class EnumType : public TagType { 1258 explicit EnumType(EnumDecl *D) 1259 : TagType(reinterpret_cast<TagDecl*>(D), QualType()) { } 1260 friend class ASTContext; // ASTContext creates these. 1261public: 1262 1263 EnumDecl *getDecl() const { 1264 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 1265 } 1266 1267 static bool classof(const TagType *T); 1268 static bool classof(const Type *T) { 1269 return isa<TagType>(T) && classof(cast<TagType>(T)); 1270 } 1271 static bool classof(const EnumType *) { return true; } 1272}; 1273 1274class TemplateTypeParmType : public Type { 1275 TemplateTypeParmDecl *Decl; 1276 1277protected: 1278 TemplateTypeParmType(TemplateTypeParmDecl *D) 1279 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true), Decl(D) { } 1280 1281 friend class ASTContext; // ASTContext creates these 1282 1283public: 1284 TemplateTypeParmDecl *getDecl() const { return Decl; } 1285 1286 virtual void getAsStringInternal(std::string &InnerString) const; 1287 1288 static bool classof(const Type *T) { 1289 return T->getTypeClass() == TemplateTypeParm; 1290 } 1291 static bool classof(const TemplateTypeParmType *T) { return true; } 1292 1293protected: 1294 virtual void EmitImpl(llvm::Serializer& S) const; 1295 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 1296 friend class Type; 1297}; 1298 1299/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 1300/// object oriented design. They basically correspond to C++ classes. There 1301/// are two kinds of interface types, normal interfaces like "NSString" and 1302/// qualified interfaces, which are qualified with a protocol list like 1303/// "NSString<NSCopyable, NSAmazing>". Qualified interface types are instances 1304/// of ObjCQualifiedInterfaceType, which is a subclass of ObjCInterfaceType. 1305class ObjCInterfaceType : public Type { 1306 ObjCInterfaceDecl *Decl; 1307protected: 1308 ObjCInterfaceType(TypeClass tc, ObjCInterfaceDecl *D) : 1309 Type(tc, QualType(), /*Dependent=*/false), Decl(D) { } 1310 friend class ASTContext; // ASTContext creates these. 1311public: 1312 1313 ObjCInterfaceDecl *getDecl() const { return Decl; } 1314 1315 /// qual_iterator and friends: this provides access to the (potentially empty) 1316 /// list of protocols qualifying this interface. If this is an instance of 1317 /// ObjCQualifiedInterfaceType it returns the list, otherwise it returns an 1318 /// empty list if there are no qualifying protocols. 1319 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 1320 inline qual_iterator qual_begin() const; 1321 inline qual_iterator qual_end() const; 1322 bool qual_empty() const { return getTypeClass() != ObjCQualifiedInterface; } 1323 1324 /// getNumProtocols - Return the number of qualifying protocols in this 1325 /// interface type, or 0 if there are none. 1326 inline unsigned getNumProtocols() const; 1327 1328 /// getProtocol - Return the specified qualifying protocol. 1329 inline ObjCProtocolDecl *getProtocol(unsigned i) const; 1330 1331 1332 virtual void getAsStringInternal(std::string &InnerString) const; 1333 static bool classof(const Type *T) { 1334 return T->getTypeClass() == ObjCInterface || 1335 T->getTypeClass() == ObjCQualifiedInterface; 1336 } 1337 static bool classof(const ObjCInterfaceType *) { return true; } 1338}; 1339 1340/// ObjCQualifiedInterfaceType - This class represents interface types 1341/// conforming to a list of protocols, such as INTF<Proto1, Proto2, Proto1>. 1342/// 1343/// Duplicate protocols are removed and protocol list is canonicalized to be in 1344/// alphabetical order. 1345class ObjCQualifiedInterfaceType : public ObjCInterfaceType, 1346 public llvm::FoldingSetNode { 1347 1348 // List of protocols for this protocol conforming object type 1349 // List is sorted on protocol name. No protocol is enterred more than once. 1350 llvm::SmallVector<ObjCProtocolDecl*, 4> Protocols; 1351 1352 ObjCQualifiedInterfaceType(ObjCInterfaceDecl *D, 1353 ObjCProtocolDecl **Protos, unsigned NumP) : 1354 ObjCInterfaceType(ObjCQualifiedInterface, D), 1355 Protocols(Protos, Protos+NumP) { } 1356 friend class ASTContext; // ASTContext creates these. 1357public: 1358 1359 ObjCProtocolDecl *getProtocol(unsigned i) const { 1360 return Protocols[i]; 1361 } 1362 unsigned getNumProtocols() const { 1363 return Protocols.size(); 1364 } 1365 1366 qual_iterator qual_begin() const { return Protocols.begin(); } 1367 qual_iterator qual_end() const { return Protocols.end(); } 1368 1369 virtual void getAsStringInternal(std::string &InnerString) const; 1370 1371 void Profile(llvm::FoldingSetNodeID &ID); 1372 static void Profile(llvm::FoldingSetNodeID &ID, 1373 const ObjCInterfaceDecl *Decl, 1374 ObjCProtocolDecl **protocols, unsigned NumProtocols); 1375 1376 static bool classof(const Type *T) { 1377 return T->getTypeClass() == ObjCQualifiedInterface; 1378 } 1379 static bool classof(const ObjCQualifiedInterfaceType *) { return true; } 1380}; 1381 1382inline ObjCInterfaceType::qual_iterator ObjCInterfaceType::qual_begin() const { 1383 if (const ObjCQualifiedInterfaceType *QIT = 1384 dyn_cast<ObjCQualifiedInterfaceType>(this)) 1385 return QIT->qual_begin(); 1386 return 0; 1387} 1388inline ObjCInterfaceType::qual_iterator ObjCInterfaceType::qual_end() const { 1389 if (const ObjCQualifiedInterfaceType *QIT = 1390 dyn_cast<ObjCQualifiedInterfaceType>(this)) 1391 return QIT->qual_end(); 1392 return 0; 1393} 1394 1395/// getNumProtocols - Return the number of qualifying protocols in this 1396/// interface type, or 0 if there are none. 1397inline unsigned ObjCInterfaceType::getNumProtocols() const { 1398 if (const ObjCQualifiedInterfaceType *QIT = 1399 dyn_cast<ObjCQualifiedInterfaceType>(this)) 1400 return QIT->getNumProtocols(); 1401 return 0; 1402} 1403 1404/// getProtocol - Return the specified qualifying protocol. 1405inline ObjCProtocolDecl *ObjCInterfaceType::getProtocol(unsigned i) const { 1406 return cast<ObjCQualifiedInterfaceType>(this)->getProtocol(i); 1407} 1408 1409 1410 1411/// ObjCQualifiedIdType - to represent id<protocol-list>. 1412/// 1413/// Duplicate protocols are removed and protocol list is canonicalized to be in 1414/// alphabetical order. 1415class ObjCQualifiedIdType : public Type, 1416 public llvm::FoldingSetNode { 1417 // List of protocols for this protocol conforming 'id' type 1418 // List is sorted on protocol name. No protocol is enterred more than once. 1419 llvm::SmallVector<ObjCProtocolDecl*, 8> Protocols; 1420 1421 ObjCQualifiedIdType(ObjCProtocolDecl **Protos, unsigned NumP) 1422 : Type(ObjCQualifiedId, QualType()/*these are always canonical*/, 1423 /*Dependent=*/false), 1424 Protocols(Protos, Protos+NumP) { } 1425 friend class ASTContext; // ASTContext creates these. 1426public: 1427 1428 ObjCProtocolDecl *getProtocols(unsigned i) const { 1429 return Protocols[i]; 1430 } 1431 unsigned getNumProtocols() const { 1432 return Protocols.size(); 1433 } 1434 ObjCProtocolDecl **getReferencedProtocols() { 1435 return &Protocols[0]; 1436 } 1437 1438 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 1439 qual_iterator qual_begin() const { return Protocols.begin(); } 1440 qual_iterator qual_end() const { return Protocols.end(); } 1441 1442 virtual void getAsStringInternal(std::string &InnerString) const; 1443 1444 void Profile(llvm::FoldingSetNodeID &ID); 1445 static void Profile(llvm::FoldingSetNodeID &ID, 1446 ObjCProtocolDecl **protocols, unsigned NumProtocols); 1447 1448 static bool classof(const Type *T) { 1449 return T->getTypeClass() == ObjCQualifiedId; 1450 } 1451 static bool classof(const ObjCQualifiedIdType *) { return true; } 1452 1453}; 1454 1455 1456// Inline function definitions. 1457 1458/// getUnqualifiedType - Return the type without any qualifiers. 1459inline QualType QualType::getUnqualifiedType() const { 1460 Type *TP = getTypePtr(); 1461 if (const ASQualType *ASQT = dyn_cast<ASQualType>(TP)) 1462 TP = ASQT->getBaseType(); 1463 return QualType(TP, 0); 1464} 1465 1466/// getAddressSpace - Return the address space of this type. 1467inline unsigned QualType::getAddressSpace() const { 1468 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 1469 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 1470 return AT->getElementType().getAddressSpace(); 1471 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 1472 return RT->getAddressSpace(); 1473 if (const ASQualType *ASQT = dyn_cast<ASQualType>(CT)) 1474 return ASQT->getAddressSpace(); 1475 return 0; 1476} 1477 1478/// isMoreQualifiedThan - Determine whether this type is more 1479/// qualified than the Other type. For example, "const volatile int" 1480/// is more qualified than "const int", "volatile int", and 1481/// "int". However, it is not more qualified than "const volatile 1482/// int". 1483inline bool QualType::isMoreQualifiedThan(QualType Other) const { 1484 // FIXME: Handle address spaces 1485 unsigned MyQuals = this->getCVRQualifiers(); 1486 unsigned OtherQuals = Other.getCVRQualifiers(); 1487 assert(this->getAddressSpace() == 0 && "Address space not checked"); 1488 assert(Other.getAddressSpace() == 0 && "Address space not checked"); 1489 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 1490} 1491 1492/// isAtLeastAsQualifiedAs - Determine whether this type is at last 1493/// as qualified as the Other type. For example, "const volatile 1494/// int" is at least as qualified as "const int", "volatile int", 1495/// "int", and "const volatile int". 1496inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 1497 // FIXME: Handle address spaces 1498 unsigned MyQuals = this->getCVRQualifiers(); 1499 unsigned OtherQuals = Other.getCVRQualifiers(); 1500 assert(this->getAddressSpace() == 0 && "Address space not checked"); 1501 assert(Other.getAddressSpace() == 0 && "Address space not checked"); 1502 return (MyQuals | OtherQuals) == MyQuals; 1503} 1504 1505/// getNonReferenceType - If Type is a reference type (e.g., const 1506/// int&), returns the type that the reference refers to ("const 1507/// int"). Otherwise, returns the type itself. This routine is used 1508/// throughout Sema to implement C++ 5p6: 1509/// 1510/// If an expression initially has the type "reference to T" (8.3.2, 1511/// 8.5.3), the type is adjusted to "T" prior to any further 1512/// analysis, the expression designates the object or function 1513/// denoted by the reference, and the expression is an lvalue. 1514inline QualType QualType::getNonReferenceType() const { 1515 if (const ReferenceType *RefType = (*this)->getAsReferenceType()) 1516 return RefType->getPointeeType(); 1517 else 1518 return *this; 1519} 1520 1521inline const TypedefType* Type::getAsTypedefType() const { 1522 return dyn_cast<TypedefType>(this); 1523} 1524inline const ObjCInterfaceType *Type::getAsPointerToObjCInterfaceType() const { 1525 if (const PointerType *PT = getAsPointerType()) 1526 return PT->getPointeeType()->getAsObjCInterfaceType(); 1527 return 0; 1528} 1529 1530// NOTE: All of these methods use "getUnqualifiedType" to strip off address 1531// space qualifiers if present. 1532inline bool Type::isFunctionType() const { 1533 return isa<FunctionType>(CanonicalType.getUnqualifiedType()); 1534} 1535inline bool Type::isPointerType() const { 1536 return isa<PointerType>(CanonicalType.getUnqualifiedType()); 1537} 1538inline bool Type::isBlockPointerType() const { 1539 return isa<BlockPointerType>(CanonicalType); 1540} 1541inline bool Type::isReferenceType() const { 1542 return isa<ReferenceType>(CanonicalType.getUnqualifiedType()); 1543} 1544inline bool Type::isPointerLikeType() const { 1545 return isa<PointerLikeType>(CanonicalType.getUnqualifiedType()); 1546} 1547inline bool Type::isFunctionPointerType() const { 1548 if (const PointerType* T = getAsPointerType()) 1549 return T->getPointeeType()->isFunctionType(); 1550 else 1551 return false; 1552} 1553inline bool Type::isArrayType() const { 1554 return isa<ArrayType>(CanonicalType.getUnqualifiedType()); 1555} 1556inline bool Type::isConstantArrayType() const { 1557 return isa<ConstantArrayType>(CanonicalType.getUnqualifiedType()); 1558} 1559inline bool Type::isIncompleteArrayType() const { 1560 return isa<IncompleteArrayType>(CanonicalType.getUnqualifiedType()); 1561} 1562inline bool Type::isVariableArrayType() const { 1563 return isa<VariableArrayType>(CanonicalType.getUnqualifiedType()); 1564} 1565inline bool Type::isDependentSizedArrayType() const { 1566 return isa<DependentSizedArrayType>(CanonicalType.getUnqualifiedType()); 1567} 1568inline bool Type::isRecordType() const { 1569 return isa<RecordType>(CanonicalType.getUnqualifiedType()); 1570} 1571inline bool Type::isAnyComplexType() const { 1572 return isa<ComplexType>(CanonicalType.getUnqualifiedType()); 1573} 1574inline bool Type::isVectorType() const { 1575 return isa<VectorType>(CanonicalType.getUnqualifiedType()); 1576} 1577inline bool Type::isExtVectorType() const { 1578 return isa<ExtVectorType>(CanonicalType.getUnqualifiedType()); 1579} 1580inline bool Type::isObjCInterfaceType() const { 1581 return isa<ObjCInterfaceType>(CanonicalType.getUnqualifiedType()); 1582} 1583inline bool Type::isObjCQualifiedInterfaceType() const { 1584 return isa<ObjCQualifiedInterfaceType>(CanonicalType.getUnqualifiedType()); 1585} 1586inline bool Type::isObjCQualifiedIdType() const { 1587 return isa<ObjCQualifiedIdType>(CanonicalType.getUnqualifiedType()); 1588} 1589inline bool Type::isTemplateTypeParmType() const { 1590 return isa<TemplateTypeParmType>(CanonicalType.getUnqualifiedType()); 1591} 1592 1593inline bool Type::isOverloadType() const { 1594 if (const BuiltinType *BT = getAsBuiltinType()) 1595 return BT->getKind() == BuiltinType::Overload; 1596 else 1597 return false; 1598} 1599 1600/// Insertion operator for diagnostics. This allows sending QualType's into a 1601/// diagnostic with <<. 1602inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 1603 QualType T) { 1604 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 1605 Diagnostic::ak_qualtype); 1606 return DB; 1607} 1608 1609} // end namespace clang 1610 1611#endif 1612