Type.h revision b9b218e566459808be9f1c52b03afad3e0d39ed3
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 void setCVRQualifiers(unsigned Quals) { Value.setInt(Quals); } 97 Type *getTypePtr() const { return Value.getPointer(); } 98 99 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 100 static QualType getFromOpaquePtr(void *Ptr) { 101 QualType T; 102 T.Value.setFromOpaqueValue(Ptr); 103 return T; 104 } 105 106 Type &operator*() const { 107 return *getTypePtr(); 108 } 109 110 Type *operator->() const { 111 return getTypePtr(); 112 } 113 114 /// isNull - Return true if this QualType doesn't point to a type yet. 115 bool isNull() const { 116 return getTypePtr() == 0; 117 } 118 119 bool isConstQualified() const { 120 return (getCVRQualifiers() & Const) ? true : false; 121 } 122 bool isVolatileQualified() const { 123 return (getCVRQualifiers() & Volatile) ? true : false; 124 } 125 bool isRestrictQualified() const { 126 return (getCVRQualifiers() & Restrict) ? true : false; 127 } 128 129 bool isConstant(ASTContext& Ctx) const; 130 131 /// addConst/addVolatile/addRestrict - add the specified type qual to this 132 /// QualType. 133 void addConst() { Value.setInt(Value.getInt() | Const); } 134 void addVolatile() { Value.setInt(Value.getInt() | Volatile); } 135 void addRestrict() { Value.setInt(Value.getInt() | Restrict); } 136 137 void removeConst() { Value.setInt(Value.getInt() & ~Const); } 138 void removeVolatile() { Value.setInt(Value.getInt() & ~Volatile); } 139 void removeRestrict() { Value.setInt(Value.getInt() & ~Restrict); } 140 141 QualType getQualifiedType(unsigned TQs) const { 142 return QualType(getTypePtr(), TQs); 143 } 144 QualType getWithAdditionalQualifiers(unsigned TQs) const { 145 return QualType(getTypePtr(), TQs|getCVRQualifiers()); 146 } 147 148 QualType withConst() const { return getWithAdditionalQualifiers(Const); } 149 QualType withVolatile() const { return getWithAdditionalQualifiers(Volatile);} 150 QualType withRestrict() const { return getWithAdditionalQualifiers(Restrict);} 151 152 QualType getUnqualifiedType() const; 153 bool isMoreQualifiedThan(QualType Other) const; 154 bool isAtLeastAsQualifiedAs(QualType Other) const; 155 QualType getNonReferenceType() const; 156 157 158 /// operator==/!= - Indicate whether the specified types and qualifiers are 159 /// identical. 160 bool operator==(const QualType &RHS) const { 161 return Value == RHS.Value; 162 } 163 bool operator!=(const QualType &RHS) const { 164 return Value != RHS.Value; 165 } 166 std::string getAsString() const { 167 std::string S; 168 getAsStringInternal(S); 169 return S; 170 } 171 void getAsStringInternal(std::string &Str) const; 172 173 void dump(const char *s) const; 174 void dump() const; 175 176 void Profile(llvm::FoldingSetNodeID &ID) const { 177 ID.AddPointer(getAsOpaquePtr()); 178 } 179 180public: 181 182 /// getAddressSpace - Return the address space of this type. 183 inline unsigned getAddressSpace() const; 184 185 /// Emit - Serialize a QualType to Bitcode. 186 void Emit(llvm::Serializer& S) const; 187 188 /// Read - Deserialize a QualType from Bitcode. 189 static QualType ReadVal(llvm::Deserializer& D); 190 191 void ReadBackpatch(llvm::Deserializer& D); 192}; 193 194} // end clang. 195 196namespace llvm { 197/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 198/// to a specific Type class. 199template<> struct simplify_type<const ::clang::QualType> { 200 typedef ::clang::Type* SimpleType; 201 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 202 return Val.getTypePtr(); 203 } 204}; 205template<> struct simplify_type< ::clang::QualType> 206 : public simplify_type<const ::clang::QualType> {}; 207 208} // end namespace llvm 209 210namespace clang { 211 212/// Type - This is the base class of the type hierarchy. A central concept 213/// with types is that each type always has a canonical type. A canonical type 214/// is the type with any typedef names stripped out of it or the types it 215/// references. For example, consider: 216/// 217/// typedef int foo; 218/// typedef foo* bar; 219/// 'int *' 'foo *' 'bar' 220/// 221/// There will be a Type object created for 'int'. Since int is canonical, its 222/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 223/// TypeNameType). Its CanonicalType pointer points to the 'int' Type. Next 224/// there is a PointerType that represents 'int*', which, like 'int', is 225/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 226/// type is 'int*', and there is a TypeNameType for 'bar', whose canonical type 227/// is also 'int*'. 228/// 229/// Non-canonical types are useful for emitting diagnostics, without losing 230/// information about typedefs being used. Canonical types are useful for type 231/// comparisons (they allow by-pointer equality tests) and useful for reasoning 232/// about whether something has a particular form (e.g. is a function type), 233/// because they implicitly, recursively, strip all typedefs out of a type. 234/// 235/// Types, once created, are immutable. 236/// 237class Type { 238public: 239 enum TypeClass { 240 Builtin, Complex, Pointer, Reference, 241 ConstantArray, VariableArray, IncompleteArray, DependentSizedArray, 242 Vector, ExtVector, 243 FunctionNoProto, FunctionProto, 244 TypeName, Tagged, ASQual, 245 TemplateTypeParm, 246 ObjCInterface, ObjCQualifiedInterface, 247 ObjCQualifiedId, 248 TypeOfExp, TypeOfTyp, // GNU typeof extension. 249 BlockPointer // C extension 250 }; 251private: 252 QualType CanonicalType; 253 254 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 255 bool Dependent : 1; 256 257 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 258 /// Note that this should stay at the end of the ivars for Type so that 259 /// subclasses can pack their bitfields into the same word. 260 unsigned TC : 5; 261 262protected: 263 // silence VC++ warning C4355: 'this' : used in base member initializer list 264 Type *this_() { return this; } 265 Type(TypeClass tc, QualType Canonical, bool dependent) 266 : CanonicalType(Canonical.isNull() ? QualType(this_(), 0) : Canonical), 267 Dependent(dependent), TC(tc) {} 268 virtual ~Type() {} 269 virtual void Destroy(ASTContext& C); 270 friend class ASTContext; 271 272 void EmitTypeInternal(llvm::Serializer& S) const; 273 void ReadTypeInternal(llvm::Deserializer& D); 274 275public: 276 TypeClass getTypeClass() const { return static_cast<TypeClass>(TC); } 277 278 bool isCanonical() const { return CanonicalType.getTypePtr() == this; } 279 280 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 281 /// object types, function types, and incomplete types. 282 283 /// isObjectType - types that fully describe objects. An object is a region 284 /// of memory that can be examined and stored into (H&S). 285 bool isObjectType() const; 286 287 /// isIncompleteType - Return true if this is an incomplete type. 288 /// A type that can describe objects, but which lacks information needed to 289 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 290 /// routine will need to determine if the size is actually required. 291 bool isIncompleteType() const; 292 293 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 294 /// type, in other words, not a function type. 295 bool isIncompleteOrObjectType() const { 296 return !isFunctionType(); 297 } 298 299 /// isVariablyModifiedType (C99 6.7.5.2p2) - Return true for variable array 300 /// types that have a non-constant expression. This does not include "[]". 301 bool isVariablyModifiedType() const; 302 303 /// Helper methods to distinguish type categories. All type predicates 304 /// operate on the canonical type, ignoring typedefs and qualifiers. 305 306 /// isIntegerType() does *not* include complex integers (a GCC extension). 307 /// isComplexIntegerType() can be used to test for complex integers. 308 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 309 bool isEnumeralType() const; 310 bool isBooleanType() const; 311 bool isCharType() const; 312 bool isWideCharType() const; 313 bool isIntegralType() const; 314 315 /// Floating point categories. 316 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 317 /// isComplexType() does *not* include complex integers (a GCC extension). 318 /// isComplexIntegerType() can be used to test for complex integers. 319 bool isComplexType() const; // C99 6.2.5p11 (complex) 320 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 321 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 322 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 323 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 324 bool isVoidType() const; // C99 6.2.5p19 325 bool isDerivedType() const; // C99 6.2.5p20 326 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 327 bool isAggregateType() const; // C99 6.2.5p21 (arrays, structures) 328 329 // Type Predicates: Check to see if this type is structurally the specified 330 // type, ignoring typedefs and qualifiers. 331 bool isFunctionType() const; 332 bool isPointerLikeType() const; // Pointer or Reference. 333 bool isPointerType() const; 334 bool isBlockPointerType() const; 335 bool isReferenceType() const; 336 bool isFunctionPointerType() const; 337 bool isArrayType() const; 338 bool isConstantArrayType() const; 339 bool isIncompleteArrayType() const; 340 bool isVariableArrayType() const; 341 bool isDependentSizedArrayType() const; 342 bool isRecordType() const; 343 bool isClassType() const; 344 bool isStructureType() const; 345 bool isUnionType() const; 346 bool isComplexIntegerType() const; // GCC _Complex integer type. 347 bool isVectorType() const; // GCC vector type. 348 bool isExtVectorType() const; // Extended vector type. 349 bool isObjCInterfaceType() const; // NSString or NSString<foo> 350 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 351 bool isObjCQualifiedIdType() const; // id<foo> 352 bool isTemplateTypeParmType() const; // C++ template type parameter 353 354 /// isDependentType - Whether this type is a dependent type, meaning 355 /// that its definition somehow depends on a template parameter 356 /// (C++ [temp.dep.type]). 357 bool isDependentType() const { return Dependent; } 358 bool isOverloadType() const; // C++ overloaded function 359 360 // Type Checking Functions: Check to see if this type is structurally the 361 // specified type, ignoring typedefs and qualifiers, and return a pointer to 362 // the best type we can. 363 const BuiltinType *getAsBuiltinType() const; 364 const FunctionType *getAsFunctionType() const; 365 const FunctionTypeProto *getAsFunctionTypeProto() const; 366 const PointerLikeType *getAsPointerLikeType() const; // Pointer or Reference. 367 const PointerType *getAsPointerType() const; 368 const BlockPointerType *getAsBlockPointerType() const; 369 const ReferenceType *getAsReferenceType() const; 370 const RecordType *getAsRecordType() const; 371 const RecordType *getAsStructureType() const; 372 /// NOTE: getAs*ArrayType are methods on ASTContext. 373 const TypedefType *getAsTypedefType() const; 374 const RecordType *getAsUnionType() const; 375 const EnumType *getAsEnumType() const; 376 const VectorType *getAsVectorType() const; // GCC vector type. 377 const ComplexType *getAsComplexType() const; 378 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 379 const ExtVectorType *getAsExtVectorType() const; // Extended vector type. 380 const ObjCInterfaceType *getAsObjCInterfaceType() const; 381 const ObjCQualifiedInterfaceType *getAsObjCQualifiedInterfaceType() const; 382 const ObjCQualifiedIdType *getAsObjCQualifiedIdType() const; 383 const TemplateTypeParmType *getAsTemplateTypeParmType() const; 384 385 /// getAsPointerToObjCInterfaceType - If this is a pointer to an ObjC 386 /// interface, return the interface type, otherwise return null. 387 const ObjCInterfaceType *getAsPointerToObjCInterfaceType() const; 388 389 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 390 /// element type of the array, potentially with type qualifiers missing. 391 /// This method should never be used when type qualifiers are meaningful. 392 const Type *getArrayElementTypeNoTypeQual() const; 393 394 395 396 /// getDesugaredType - Return the specified type with any "sugar" removed from 397 /// the type. This takes off typedefs, typeof's etc. If the outer level of 398 /// the type is already concrete, it returns it unmodified. This is similar 399 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 400 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 401 /// concrete. 402 QualType getDesugaredType() const; 403 404 /// More type predicates useful for type checking/promotion 405 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 406 407 /// isSignedIntegerType - Return true if this is an integer type that is 408 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 409 /// an enum decl which has a signed representation, or a vector of signed 410 /// integer element type. 411 bool isSignedIntegerType() const; 412 413 /// isUnsignedIntegerType - Return true if this is an integer type that is 414 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 415 /// decl which has an unsigned representation, or a vector of unsigned integer 416 /// element type. 417 bool isUnsignedIntegerType() const; 418 419 /// isConstantSizeType - Return true if this is not a variable sized type, 420 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 421 /// incomplete types. 422 bool isConstantSizeType() const; 423 424 QualType getCanonicalTypeInternal() const { return CanonicalType; } 425 void dump() const; 426 virtual void getAsStringInternal(std::string &InnerString) const = 0; 427 static bool classof(const Type *) { return true; } 428 429protected: 430 /// Emit - Emit a Type to bitcode. Used by ASTContext. 431 void Emit(llvm::Serializer& S) const; 432 433 /// Create - Construct a Type from bitcode. Used by ASTContext. 434 static void Create(ASTContext& Context, unsigned i, llvm::Deserializer& S); 435 436 /// EmitImpl - Subclasses must implement this method in order to 437 /// be serialized. 438 // FIXME: Make this abstract once implemented. 439 virtual void EmitImpl(llvm::Serializer& S) const { 440 assert (false && "Serializization for type not supported."); 441 } 442}; 443 444/// ASQualType - TR18037 (C embedded extensions) 6.2.5p26 445/// This supports address space qualified types. 446/// 447class ASQualType : public Type, public llvm::FoldingSetNode { 448 /// BaseType - This is the underlying type that this qualifies. All CVR 449 /// qualifiers are stored on the QualType that references this type, so we 450 /// can't have any here. 451 Type *BaseType; 452 /// Address Space ID - The address space ID this type is qualified with. 453 unsigned AddressSpace; 454 ASQualType(Type *Base, QualType CanonicalPtr, unsigned AddrSpace) : 455 Type(ASQual, CanonicalPtr, Base->isDependentType()), BaseType(Base), 456 AddressSpace(AddrSpace) { 457 } 458 friend class ASTContext; // ASTContext creates these. 459public: 460 Type *getBaseType() const { return BaseType; } 461 unsigned getAddressSpace() const { return AddressSpace; } 462 463 virtual void getAsStringInternal(std::string &InnerString) const; 464 465 void Profile(llvm::FoldingSetNodeID &ID) { 466 Profile(ID, getBaseType(), AddressSpace); 467 } 468 static void Profile(llvm::FoldingSetNodeID &ID, Type *Base, 469 unsigned AddrSpace) { 470 ID.AddPointer(Base); 471 ID.AddInteger(AddrSpace); 472 } 473 474 static bool classof(const Type *T) { return T->getTypeClass() == ASQual; } 475 static bool classof(const ASQualType *) { return true; } 476 477protected: 478 virtual void EmitImpl(llvm::Serializer& S) const; 479 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 480 friend class Type; 481}; 482 483 484/// BuiltinType - This class is used for builtin types like 'int'. Builtin 485/// types are always canonical and have a literal name field. 486class BuiltinType : public Type { 487public: 488 enum Kind { 489 Void, 490 491 Bool, // This is bool and/or _Bool. 492 Char_U, // This is 'char' for targets where char is unsigned. 493 UChar, // This is explicitly qualified unsigned char. 494 UShort, 495 UInt, 496 ULong, 497 ULongLong, 498 499 Char_S, // This is 'char' for targets where char is signed. 500 SChar, // This is explicitly qualified signed char. 501 WChar, // This is 'wchar_t' for C++. 502 Short, 503 Int, 504 Long, 505 LongLong, 506 507 Float, Double, LongDouble, 508 509 Overload, // This represents the type of an overloaded function declaration. 510 Dependent // This represents the type of a type-dependent expression. 511 }; 512private: 513 Kind TypeKind; 514public: 515 BuiltinType(Kind K) 516 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent)), 517 TypeKind(K) {} 518 519 Kind getKind() const { return TypeKind; } 520 const char *getName() const; 521 522 virtual void getAsStringInternal(std::string &InnerString) const; 523 524 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 525 static bool classof(const BuiltinType *) { return true; } 526}; 527 528/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 529/// types (_Complex float etc) as well as the GCC integer complex extensions. 530/// 531class ComplexType : public Type, public llvm::FoldingSetNode { 532 QualType ElementType; 533 ComplexType(QualType Element, QualType CanonicalPtr) : 534 Type(Complex, CanonicalPtr, Element->isDependentType()), 535 ElementType(Element) { 536 } 537 friend class ASTContext; // ASTContext creates these. 538public: 539 QualType getElementType() const { return ElementType; } 540 541 virtual void getAsStringInternal(std::string &InnerString) const; 542 543 void Profile(llvm::FoldingSetNodeID &ID) { 544 Profile(ID, getElementType()); 545 } 546 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 547 ID.AddPointer(Element.getAsOpaquePtr()); 548 } 549 550 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 551 static bool classof(const ComplexType *) { return true; } 552 553protected: 554 virtual void EmitImpl(llvm::Serializer& S) const; 555 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 556 friend class Type; 557}; 558 559/// PointerLikeType - Common base class for pointers and references. 560/// FIXME: Add more documentation on this classes design point. For example, 561/// should BlockPointerType inherit from it? Is the concept of a PointerLikeType 562/// in the C++ standard? 563/// 564class PointerLikeType : public Type { 565 QualType PointeeType; 566protected: 567 PointerLikeType(TypeClass K, QualType Pointee, QualType CanonicalPtr) : 568 Type(K, CanonicalPtr, Pointee->isDependentType()), PointeeType(Pointee) { 569 } 570public: 571 572 QualType getPointeeType() const { return PointeeType; } 573 574 static bool classof(const Type *T) { 575 return T->getTypeClass() == Pointer || T->getTypeClass() == Reference; 576 } 577 static bool classof(const PointerLikeType *) { return true; } 578}; 579 580/// PointerType - C99 6.7.5.1 - Pointer Declarators. 581/// 582class PointerType : public PointerLikeType, public llvm::FoldingSetNode { 583 PointerType(QualType Pointee, QualType CanonicalPtr) : 584 PointerLikeType(Pointer, Pointee, CanonicalPtr) { 585 } 586 friend class ASTContext; // ASTContext creates these. 587public: 588 589 virtual void getAsStringInternal(std::string &InnerString) const; 590 591 void Profile(llvm::FoldingSetNodeID &ID) { 592 Profile(ID, getPointeeType()); 593 } 594 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 595 ID.AddPointer(Pointee.getAsOpaquePtr()); 596 } 597 598 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 599 static bool classof(const PointerType *) { return true; } 600 601protected: 602 virtual void EmitImpl(llvm::Serializer& S) const; 603 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 604 friend class Type; 605}; 606 607/// BlockPointerType - pointer to a block type. 608/// This type is to represent types syntactically represented as 609/// "void (^)(int)", etc. Pointee is required to always be a function type. 610/// FIXME: Should BlockPointerType inherit from PointerLikeType? It could 611/// simplfy some type checking code, however PointerLikeType doesn't appear 612/// to be used by the type checker. 613/// 614class BlockPointerType : public Type, public llvm::FoldingSetNode { 615 QualType PointeeType; // Block is some kind of pointer type 616 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 617 Type(BlockPointer, CanonicalCls, Pointee->isDependentType()), 618 PointeeType(Pointee) { 619 } 620 friend class ASTContext; // ASTContext creates these. 621public: 622 623 // Get the pointee type. Pointee is required to always be a function type. 624 QualType getPointeeType() const { return PointeeType; } 625 626 virtual void getAsStringInternal(std::string &InnerString) const; 627 628 void Profile(llvm::FoldingSetNodeID &ID) { 629 Profile(ID, getPointeeType()); 630 } 631 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 632 ID.AddPointer(Pointee.getAsOpaquePtr()); 633 } 634 635 static bool classof(const Type *T) { 636 return T->getTypeClass() == BlockPointer; 637 } 638 static bool classof(const BlockPointerType *) { return true; } 639 640 protected: 641 virtual void EmitImpl(llvm::Serializer& S) const; 642 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 643 friend class Type; 644}; 645 646/// ReferenceType - C++ 8.3.2 - Reference Declarators. 647/// 648class ReferenceType : public PointerLikeType, public llvm::FoldingSetNode { 649 ReferenceType(QualType Referencee, QualType CanonicalRef) : 650 PointerLikeType(Reference, Referencee, CanonicalRef) { 651 } 652 friend class ASTContext; // ASTContext creates these. 653public: 654 virtual void getAsStringInternal(std::string &InnerString) const; 655 656 void Profile(llvm::FoldingSetNodeID &ID) { 657 Profile(ID, getPointeeType()); 658 } 659 static void Profile(llvm::FoldingSetNodeID &ID, QualType Referencee) { 660 ID.AddPointer(Referencee.getAsOpaquePtr()); 661 } 662 663 static bool classof(const Type *T) { return T->getTypeClass() == Reference; } 664 static bool classof(const ReferenceType *) { return true; } 665}; 666 667/// ArrayType - C99 6.7.5.2 - Array Declarators. 668/// 669class ArrayType : public Type, public llvm::FoldingSetNode { 670public: 671 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 672 /// an array with a static size (e.g. int X[static 4]), or an array 673 /// with a star size (e.g. int X[*]). 674 /// 'static' is only allowed on function parameters. 675 enum ArraySizeModifier { 676 Normal, Static, Star 677 }; 678private: 679 /// ElementType - The element type of the array. 680 QualType ElementType; 681 682 // NOTE: VC++ treats enums as signed, avoid using the ArraySizeModifier enum 683 /// NOTE: These fields are packed into the bitfields space in the Type class. 684 unsigned SizeModifier : 2; 685 686 /// IndexTypeQuals - Capture qualifiers in declarations like: 687 /// 'int X[static restrict 4]'. For function parameters only. 688 unsigned IndexTypeQuals : 3; 689 690protected: 691 // C++ [temp.dep.type]p1: 692 // A type is dependent if it is... 693 // - an array type constructed from any dependent type or whose 694 // size is specified by a constant expression that is 695 // value-dependent, 696 ArrayType(TypeClass tc, QualType et, QualType can, 697 ArraySizeModifier sm, unsigned tq) 698 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray), 699 ElementType(et), SizeModifier(sm), IndexTypeQuals(tq) {} 700 701 friend class ASTContext; // ASTContext creates these. 702public: 703 QualType getElementType() const { return ElementType; } 704 ArraySizeModifier getSizeModifier() const { 705 return ArraySizeModifier(SizeModifier); 706 } 707 unsigned getIndexTypeQualifier() const { return IndexTypeQuals; } 708 709 static bool classof(const Type *T) { 710 return T->getTypeClass() == ConstantArray || 711 T->getTypeClass() == VariableArray || 712 T->getTypeClass() == IncompleteArray || 713 T->getTypeClass() == DependentSizedArray; 714 } 715 static bool classof(const ArrayType *) { return true; } 716}; 717 718/// ConstantArrayType - This class represents C arrays with a specified constant 719/// size. For example 'int A[100]' has ConstantArrayType where the element type 720/// is 'int' and the size is 100. 721class ConstantArrayType : public ArrayType { 722 llvm::APInt Size; // Allows us to unique the type. 723 724 ConstantArrayType(QualType et, QualType can, llvm::APInt sz, 725 ArraySizeModifier sm, unsigned tq) 726 : ArrayType(ConstantArray, et, can, sm, tq), Size(sz) {} 727 friend class ASTContext; // ASTContext creates these. 728public: 729 const llvm::APInt &getSize() const { return Size; } 730 virtual void getAsStringInternal(std::string &InnerString) const; 731 732 void Profile(llvm::FoldingSetNodeID &ID) { 733 Profile(ID, getElementType(), getSize()); 734 } 735 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 736 llvm::APInt ArraySize) { 737 ID.AddPointer(ET.getAsOpaquePtr()); 738 ID.AddInteger(ArraySize.getZExtValue()); 739 } 740 static bool classof(const Type *T) { 741 return T->getTypeClass() == ConstantArray; 742 } 743 static bool classof(const ConstantArrayType *) { return true; } 744 745protected: 746 virtual void EmitImpl(llvm::Serializer& S) const; 747 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 748 friend class Type; 749}; 750 751/// IncompleteArrayType - This class represents C arrays with an unspecified 752/// size. For example 'int A[]' has an IncompleteArrayType where the element 753/// type is 'int' and the size is unspecified. 754class IncompleteArrayType : public ArrayType { 755 IncompleteArrayType(QualType et, QualType can, 756 ArraySizeModifier sm, unsigned tq) 757 : ArrayType(IncompleteArray, et, can, sm, tq) {} 758 friend class ASTContext; // ASTContext creates these. 759public: 760 761 virtual void getAsStringInternal(std::string &InnerString) const; 762 763 static bool classof(const Type *T) { 764 return T->getTypeClass() == IncompleteArray; 765 } 766 static bool classof(const IncompleteArrayType *) { return true; } 767 768 friend class StmtIteratorBase; 769 770 void Profile(llvm::FoldingSetNodeID &ID) { 771 Profile(ID, getElementType()); 772 } 773 774 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET) { 775 ID.AddPointer(ET.getAsOpaquePtr()); 776 } 777 778protected: 779 virtual void EmitImpl(llvm::Serializer& S) const; 780 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 781 friend class Type; 782}; 783 784/// VariableArrayType - This class represents C arrays with a specified size 785/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 786/// Since the size expression is an arbitrary expression, we store it as such. 787/// 788/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 789/// should not be: two lexically equivalent variable array types could mean 790/// different things, for example, these variables do not have the same type 791/// dynamically: 792/// 793/// void foo(int x) { 794/// int Y[x]; 795/// ++x; 796/// int Z[x]; 797/// } 798/// 799class VariableArrayType : public ArrayType { 800 /// SizeExpr - An assignment expression. VLA's are only permitted within 801 /// a function block. 802 Stmt *SizeExpr; 803 804 VariableArrayType(QualType et, QualType can, Expr *e, 805 ArraySizeModifier sm, unsigned tq) 806 : ArrayType(VariableArray, et, can, sm, tq), SizeExpr((Stmt*) e) {} 807 friend class ASTContext; // ASTContext creates these. 808 virtual void Destroy(ASTContext& C); 809 810public: 811 Expr *getSizeExpr() const { 812 // We use C-style casts instead of cast<> here because we do not wish 813 // to have a dependency of Type.h on Stmt.h/Expr.h. 814 return (Expr*) SizeExpr; 815 } 816 817 virtual void getAsStringInternal(std::string &InnerString) const; 818 819 static bool classof(const Type *T) { 820 return T->getTypeClass() == VariableArray; 821 } 822 static bool classof(const VariableArrayType *) { return true; } 823 824 friend class StmtIteratorBase; 825 826 void Profile(llvm::FoldingSetNodeID &ID) { 827 assert (0 && "Cannnot unique VariableArrayTypes."); 828 } 829 830protected: 831 virtual void EmitImpl(llvm::Serializer& S) const; 832 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 833 friend class Type; 834}; 835 836/// DependentSizedArrayType - This type represents an array type in 837/// C++ whose size is a value-dependent expression. For example: 838/// @code 839/// template<typename T, int Size> 840/// class array { 841/// T data[Size]; 842/// }; 843/// @endcode 844/// For these types, we won't actually know what the array bound is 845/// until template instantiation occurs, at which point this will 846/// become either a ConstantArrayType or a VariableArrayType. 847class DependentSizedArrayType : public ArrayType { 848 /// SizeExpr - An assignment expression that will instantiate to the 849 /// size of the array. 850 Stmt *SizeExpr; 851 852 DependentSizedArrayType(QualType et, QualType can, Expr *e, 853 ArraySizeModifier sm, unsigned tq) 854 : ArrayType(DependentSizedArray, et, can, sm, tq), SizeExpr((Stmt*) e) {} 855 friend class ASTContext; // ASTContext creates these. 856 virtual void Destroy(ASTContext& C); 857 858public: 859 Expr *getSizeExpr() const { 860 // We use C-style casts instead of cast<> here because we do not wish 861 // to have a dependency of Type.h on Stmt.h/Expr.h. 862 return (Expr*) SizeExpr; 863 } 864 865 virtual void getAsStringInternal(std::string &InnerString) const; 866 867 static bool classof(const Type *T) { 868 return T->getTypeClass() == DependentSizedArray; 869 } 870 static bool classof(const DependentSizedArrayType *) { return true; } 871 872 friend class StmtIteratorBase; 873 874 void Profile(llvm::FoldingSetNodeID &ID) { 875 assert (0 && "Cannnot unique DependentSizedArrayTypes."); 876 } 877 878protected: 879 virtual void EmitImpl(llvm::Serializer& S) const; 880 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 881 friend class Type; 882}; 883 884/// VectorType - GCC generic vector type. This type is created using 885/// __attribute__((vector_size(n)), where "n" specifies the vector size in 886/// bytes. Since the constructor takes the number of vector elements, the 887/// client is responsible for converting the size into the number of elements. 888class VectorType : public Type, public llvm::FoldingSetNode { 889protected: 890 /// ElementType - The element type of the vector. 891 QualType ElementType; 892 893 /// NumElements - The number of elements in the vector. 894 unsigned NumElements; 895 896 VectorType(QualType vecType, unsigned nElements, QualType canonType) : 897 Type(Vector, canonType, vecType->isDependentType()), 898 ElementType(vecType), NumElements(nElements) {} 899 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 900 QualType canonType) 901 : Type(tc, canonType, vecType->isDependentType()), ElementType(vecType), 902 NumElements(nElements) {} 903 friend class ASTContext; // ASTContext creates these. 904public: 905 906 QualType getElementType() const { return ElementType; } 907 unsigned getNumElements() const { return NumElements; } 908 909 virtual void getAsStringInternal(std::string &InnerString) const; 910 911 void Profile(llvm::FoldingSetNodeID &ID) { 912 Profile(ID, getElementType(), getNumElements(), getTypeClass()); 913 } 914 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 915 unsigned NumElements, TypeClass TypeClass) { 916 ID.AddPointer(ElementType.getAsOpaquePtr()); 917 ID.AddInteger(NumElements); 918 ID.AddInteger(TypeClass); 919 } 920 static bool classof(const Type *T) { 921 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 922 } 923 static bool classof(const VectorType *) { return true; } 924}; 925 926/// ExtVectorType - Extended vector type. This type is created using 927/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 928/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 929/// class enables syntactic extensions, like Vector Components for accessing 930/// points, colors, and textures (modeled after OpenGL Shading Language). 931class ExtVectorType : public VectorType { 932 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 933 VectorType(ExtVector, vecType, nElements, canonType) {} 934 friend class ASTContext; // ASTContext creates these. 935public: 936 static int getPointAccessorIdx(char c) { 937 switch (c) { 938 default: return -1; 939 case 'x': return 0; 940 case 'y': return 1; 941 case 'z': return 2; 942 case 'w': return 3; 943 } 944 } 945 static int getColorAccessorIdx(char c) { 946 switch (c) { 947 default: return -1; 948 case 'r': return 0; 949 case 'g': return 1; 950 case 'b': return 2; 951 case 'a': return 3; 952 } 953 } 954 static int getTextureAccessorIdx(char c) { 955 switch (c) { 956 default: return -1; 957 case 's': return 0; 958 case 't': return 1; 959 case 'p': return 2; 960 case 'q': return 3; 961 } 962 }; 963 964 static int getAccessorIdx(char c) { 965 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 966 if (int idx = getColorAccessorIdx(c)+1) return idx-1; 967 return getTextureAccessorIdx(c); 968 } 969 970 bool isAccessorWithinNumElements(char c) const { 971 if (int idx = getAccessorIdx(c)+1) 972 return unsigned(idx-1) < NumElements; 973 return false; 974 } 975 virtual void getAsStringInternal(std::string &InnerString) const; 976 977 static bool classof(const Type *T) { 978 return T->getTypeClass() == ExtVector; 979 } 980 static bool classof(const ExtVectorType *) { return true; } 981}; 982 983/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 984/// class of FunctionTypeNoProto and FunctionTypeProto. 985/// 986class FunctionType : public Type { 987 /// SubClassData - This field is owned by the subclass, put here to pack 988 /// tightly with the ivars in Type. 989 bool SubClassData : 1; 990 991 /// TypeQuals - Used only by FunctionTypeProto, put here to pack with the 992 /// other bitfields. 993 /// The qualifiers are part of FunctionTypeProto because... 994 /// 995 /// C++ 8.3.5p4: The return type, the parameter type list and the 996 /// cv-qualifier-seq, [...], are part of the function type. 997 /// 998 unsigned TypeQuals : 3; 999 1000 // The type returned by the function. 1001 QualType ResultType; 1002protected: 1003 FunctionType(TypeClass tc, QualType res, bool SubclassInfo, 1004 unsigned typeQuals, QualType Canonical, bool Dependent) 1005 : Type(tc, Canonical, Dependent), 1006 SubClassData(SubclassInfo), TypeQuals(typeQuals), ResultType(res) {} 1007 bool getSubClassData() const { return SubClassData; } 1008 unsigned getTypeQuals() const { return TypeQuals; } 1009public: 1010 1011 QualType getResultType() const { return ResultType; } 1012 1013 1014 static bool classof(const Type *T) { 1015 return T->getTypeClass() == FunctionNoProto || 1016 T->getTypeClass() == FunctionProto; 1017 } 1018 static bool classof(const FunctionType *) { return true; } 1019}; 1020 1021/// FunctionTypeNoProto - Represents a K&R-style 'int foo()' function, which has 1022/// no information available about its arguments. 1023class FunctionTypeNoProto : public FunctionType, public llvm::FoldingSetNode { 1024 FunctionTypeNoProto(QualType Result, QualType Canonical) 1025 : FunctionType(FunctionNoProto, Result, false, 0, Canonical, 1026 /*Dependent=*/false) {} 1027 friend class ASTContext; // ASTContext creates these. 1028public: 1029 // No additional state past what FunctionType provides. 1030 1031 virtual void getAsStringInternal(std::string &InnerString) const; 1032 1033 void Profile(llvm::FoldingSetNodeID &ID) { 1034 Profile(ID, getResultType()); 1035 } 1036 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType) { 1037 ID.AddPointer(ResultType.getAsOpaquePtr()); 1038 } 1039 1040 static bool classof(const Type *T) { 1041 return T->getTypeClass() == FunctionNoProto; 1042 } 1043 static bool classof(const FunctionTypeNoProto *) { return true; } 1044 1045protected: 1046 virtual void EmitImpl(llvm::Serializer& S) const; 1047 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 1048 friend class Type; 1049}; 1050 1051/// FunctionTypeProto - Represents a prototype with argument type info, e.g. 1052/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 1053/// arguments, not as having a single void argument. 1054class FunctionTypeProto : public FunctionType, public llvm::FoldingSetNode { 1055 /// hasAnyDependentType - Determine whether there are any dependent 1056 /// types within the arguments passed in. 1057 static bool hasAnyDependentType(const QualType *ArgArray, unsigned numArgs) { 1058 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 1059 if (ArgArray[Idx]->isDependentType()) 1060 return true; 1061 1062 return false; 1063 } 1064 1065 FunctionTypeProto(QualType Result, const QualType *ArgArray, unsigned numArgs, 1066 bool isVariadic, unsigned typeQuals, QualType Canonical) 1067 : FunctionType(FunctionProto, Result, isVariadic, typeQuals, Canonical, 1068 (Result->isDependentType() || 1069 hasAnyDependentType(ArgArray, numArgs))), 1070 NumArgs(numArgs) { 1071 // Fill in the trailing argument array. 1072 QualType *ArgInfo = reinterpret_cast<QualType *>(this+1);; 1073 for (unsigned i = 0; i != numArgs; ++i) 1074 ArgInfo[i] = ArgArray[i]; 1075 } 1076 1077 /// NumArgs - The number of arguments this function has, not counting '...'. 1078 unsigned NumArgs; 1079 1080 /// ArgInfo - There is an variable size array after the class in memory that 1081 /// holds the argument types. 1082 1083 friend class ASTContext; // ASTContext creates these. 1084 virtual void Destroy(ASTContext& C); 1085 1086public: 1087 unsigned getNumArgs() const { return NumArgs; } 1088 QualType getArgType(unsigned i) const { 1089 assert(i < NumArgs && "Invalid argument number!"); 1090 return arg_type_begin()[i]; 1091 } 1092 1093 bool isVariadic() const { return getSubClassData(); } 1094 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 1095 1096 typedef const QualType *arg_type_iterator; 1097 arg_type_iterator arg_type_begin() const { 1098 return reinterpret_cast<const QualType *>(this+1); 1099 } 1100 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 1101 1102 virtual void getAsStringInternal(std::string &InnerString) const; 1103 1104 static bool classof(const Type *T) { 1105 return T->getTypeClass() == FunctionProto; 1106 } 1107 static bool classof(const FunctionTypeProto *) { return true; } 1108 1109 void Profile(llvm::FoldingSetNodeID &ID); 1110 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 1111 arg_type_iterator ArgTys, unsigned NumArgs, 1112 bool isVariadic, unsigned TypeQuals); 1113 1114protected: 1115 virtual void EmitImpl(llvm::Serializer& S) const; 1116 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 1117 friend class Type; 1118}; 1119 1120 1121class TypedefType : public Type { 1122 TypedefDecl *Decl; 1123protected: 1124 TypedefType(TypeClass tc, TypedefDecl *D, QualType can) 1125 : Type(tc, can, can->isDependentType()), Decl(D) { 1126 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1127 } 1128 friend class ASTContext; // ASTContext creates these. 1129public: 1130 1131 TypedefDecl *getDecl() const { return Decl; } 1132 1133 /// LookThroughTypedefs - Return the ultimate type this typedef corresponds to 1134 /// potentially looking through *all* consequtive typedefs. This returns the 1135 /// sum of the type qualifiers, so if you have: 1136 /// typedef const int A; 1137 /// typedef volatile A B; 1138 /// looking through the typedefs for B will give you "const volatile A". 1139 QualType LookThroughTypedefs() const; 1140 1141 virtual void getAsStringInternal(std::string &InnerString) const; 1142 1143 static bool classof(const Type *T) { return T->getTypeClass() == TypeName; } 1144 static bool classof(const TypedefType *) { return true; } 1145 1146protected: 1147 virtual void EmitImpl(llvm::Serializer& S) const; 1148 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 1149 friend class Type; 1150}; 1151 1152/// TypeOfExpr (GCC extension). 1153class TypeOfExpr : public Type { 1154 Expr *TOExpr; 1155 TypeOfExpr(Expr *E, QualType can); 1156 friend class ASTContext; // ASTContext creates these. 1157public: 1158 Expr *getUnderlyingExpr() const { return TOExpr; } 1159 1160 virtual void getAsStringInternal(std::string &InnerString) const; 1161 1162 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExp; } 1163 static bool classof(const TypeOfExpr *) { return true; } 1164}; 1165 1166/// TypeOfType (GCC extension). 1167class TypeOfType : public Type { 1168 QualType TOType; 1169 TypeOfType(QualType T, QualType can) 1170 : Type(TypeOfTyp, can, T->isDependentType()), TOType(T) { 1171 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1172 } 1173 friend class ASTContext; // ASTContext creates these. 1174public: 1175 QualType getUnderlyingType() const { return TOType; } 1176 1177 virtual void getAsStringInternal(std::string &InnerString) const; 1178 1179 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfTyp; } 1180 static bool classof(const TypeOfType *) { return true; } 1181}; 1182 1183class TagType : public Type { 1184 TagDecl *decl; 1185 friend class ASTContext; 1186 1187protected: 1188 // FIXME: We'll need the user to pass in information about whether 1189 // this type is dependent or not, because we don't have enough 1190 // information to compute it here. 1191 TagType(TagDecl *D, QualType can) 1192 : Type(Tagged, can, /*Dependent=*/false), decl(D) {} 1193 1194public: 1195 TagDecl *getDecl() const { return decl; } 1196 1197 virtual void getAsStringInternal(std::string &InnerString) const; 1198 1199 static bool classof(const Type *T) { return T->getTypeClass() == Tagged; } 1200 static bool classof(const TagType *) { return true; } 1201 1202protected: 1203 virtual void EmitImpl(llvm::Serializer& S) const; 1204 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 1205 friend class Type; 1206}; 1207 1208/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 1209/// to detect TagType objects of structs/unions/classes. 1210class RecordType : public TagType { 1211protected: 1212 explicit RecordType(RecordDecl *D) 1213 : TagType(reinterpret_cast<TagDecl*>(D), QualType()) { } 1214 friend class ASTContext; // ASTContext creates these. 1215public: 1216 1217 RecordDecl *getDecl() const { 1218 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 1219 } 1220 1221 // FIXME: This predicate is a helper to QualType/Type. It needs to 1222 // recursively check all fields for const-ness. If any field is declared 1223 // const, it needs to return false. 1224 bool hasConstFields() const { return false; } 1225 1226 // FIXME: RecordType needs to check when it is created that all fields are in 1227 // the same address space, and return that. 1228 unsigned getAddressSpace() const { return 0; } 1229 1230 static bool classof(const TagType *T); 1231 static bool classof(const Type *T) { 1232 return isa<TagType>(T) && classof(cast<TagType>(T)); 1233 } 1234 static bool classof(const RecordType *) { return true; } 1235}; 1236 1237/// CXXRecordType - This is a helper class that allows the use of 1238/// isa/cast/dyncast to detect TagType objects of C++ structs/unions/classes. 1239class CXXRecordType : public RecordType { 1240 explicit CXXRecordType(CXXRecordDecl *D) 1241 : RecordType(reinterpret_cast<RecordDecl*>(D)) { } 1242 friend class ASTContext; // ASTContext creates these. 1243public: 1244 1245 CXXRecordDecl *getDecl() const { 1246 return reinterpret_cast<CXXRecordDecl*>(RecordType::getDecl()); 1247 } 1248 1249 static bool classof(const TagType *T); 1250 static bool classof(const Type *T) { 1251 return isa<TagType>(T) && classof(cast<TagType>(T)); 1252 } 1253 static bool classof(const CXXRecordType *) { return true; } 1254}; 1255 1256/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 1257/// to detect TagType objects of enums. 1258class EnumType : public TagType { 1259 explicit EnumType(EnumDecl *D) 1260 : TagType(reinterpret_cast<TagDecl*>(D), QualType()) { } 1261 friend class ASTContext; // ASTContext creates these. 1262public: 1263 1264 EnumDecl *getDecl() const { 1265 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 1266 } 1267 1268 static bool classof(const TagType *T); 1269 static bool classof(const Type *T) { 1270 return isa<TagType>(T) && classof(cast<TagType>(T)); 1271 } 1272 static bool classof(const EnumType *) { return true; } 1273}; 1274 1275class TemplateTypeParmType : public Type { 1276 TemplateTypeParmDecl *Decl; 1277 1278protected: 1279 TemplateTypeParmType(TemplateTypeParmDecl *D) 1280 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true), Decl(D) { } 1281 1282 friend class ASTContext; // ASTContext creates these 1283 1284public: 1285 TemplateTypeParmDecl *getDecl() const { return Decl; } 1286 1287 virtual void getAsStringInternal(std::string &InnerString) const; 1288 1289 static bool classof(const Type *T) { 1290 return T->getTypeClass() == TemplateTypeParm; 1291 } 1292 static bool classof(const TemplateTypeParmType *T) { return true; } 1293 1294protected: 1295 virtual void EmitImpl(llvm::Serializer& S) const; 1296 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 1297 friend class Type; 1298}; 1299 1300/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 1301/// object oriented design. They basically correspond to C++ classes. There 1302/// are two kinds of interface types, normal interfaces like "NSString" and 1303/// qualified interfaces, which are qualified with a protocol list like 1304/// "NSString<NSCopyable, NSAmazing>". Qualified interface types are instances 1305/// of ObjCQualifiedInterfaceType, which is a subclass of ObjCInterfaceType. 1306class ObjCInterfaceType : public Type { 1307 ObjCInterfaceDecl *Decl; 1308protected: 1309 ObjCInterfaceType(TypeClass tc, ObjCInterfaceDecl *D) : 1310 Type(tc, QualType(), /*Dependent=*/false), Decl(D) { } 1311 friend class ASTContext; // ASTContext creates these. 1312public: 1313 1314 ObjCInterfaceDecl *getDecl() const { return Decl; } 1315 1316 /// qual_iterator and friends: this provides access to the (potentially empty) 1317 /// list of protocols qualifying this interface. If this is an instance of 1318 /// ObjCQualifiedInterfaceType it returns the list, otherwise it returns an 1319 /// empty list if there are no qualifying protocols. 1320 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 1321 inline qual_iterator qual_begin() const; 1322 inline qual_iterator qual_end() const; 1323 bool qual_empty() const { return getTypeClass() != ObjCQualifiedInterface; } 1324 1325 /// getNumProtocols - Return the number of qualifying protocols in this 1326 /// interface type, or 0 if there are none. 1327 inline unsigned getNumProtocols() const; 1328 1329 /// getProtocol - Return the specified qualifying protocol. 1330 inline ObjCProtocolDecl *getProtocol(unsigned i) const; 1331 1332 1333 virtual void getAsStringInternal(std::string &InnerString) const; 1334 static bool classof(const Type *T) { 1335 return T->getTypeClass() == ObjCInterface || 1336 T->getTypeClass() == ObjCQualifiedInterface; 1337 } 1338 static bool classof(const ObjCInterfaceType *) { return true; } 1339}; 1340 1341/// ObjCQualifiedInterfaceType - This class represents interface types 1342/// conforming to a list of protocols, such as INTF<Proto1, Proto2, Proto1>. 1343/// 1344/// Duplicate protocols are removed and protocol list is canonicalized to be in 1345/// alphabetical order. 1346class ObjCQualifiedInterfaceType : public ObjCInterfaceType, 1347 public llvm::FoldingSetNode { 1348 1349 // List of protocols for this protocol conforming object type 1350 // List is sorted on protocol name. No protocol is enterred more than once. 1351 llvm::SmallVector<ObjCProtocolDecl*, 4> Protocols; 1352 1353 ObjCQualifiedInterfaceType(ObjCInterfaceDecl *D, 1354 ObjCProtocolDecl **Protos, unsigned NumP) : 1355 ObjCInterfaceType(ObjCQualifiedInterface, D), 1356 Protocols(Protos, Protos+NumP) { } 1357 friend class ASTContext; // ASTContext creates these. 1358public: 1359 1360 ObjCProtocolDecl *getProtocol(unsigned i) const { 1361 return Protocols[i]; 1362 } 1363 unsigned getNumProtocols() const { 1364 return Protocols.size(); 1365 } 1366 1367 qual_iterator qual_begin() const { return Protocols.begin(); } 1368 qual_iterator qual_end() const { return Protocols.end(); } 1369 1370 virtual void getAsStringInternal(std::string &InnerString) const; 1371 1372 void Profile(llvm::FoldingSetNodeID &ID); 1373 static void Profile(llvm::FoldingSetNodeID &ID, 1374 const ObjCInterfaceDecl *Decl, 1375 ObjCProtocolDecl **protocols, unsigned NumProtocols); 1376 1377 static bool classof(const Type *T) { 1378 return T->getTypeClass() == ObjCQualifiedInterface; 1379 } 1380 static bool classof(const ObjCQualifiedInterfaceType *) { return true; } 1381}; 1382 1383inline ObjCInterfaceType::qual_iterator ObjCInterfaceType::qual_begin() const { 1384 if (const ObjCQualifiedInterfaceType *QIT = 1385 dyn_cast<ObjCQualifiedInterfaceType>(this)) 1386 return QIT->qual_begin(); 1387 return 0; 1388} 1389inline ObjCInterfaceType::qual_iterator ObjCInterfaceType::qual_end() const { 1390 if (const ObjCQualifiedInterfaceType *QIT = 1391 dyn_cast<ObjCQualifiedInterfaceType>(this)) 1392 return QIT->qual_end(); 1393 return 0; 1394} 1395 1396/// getNumProtocols - Return the number of qualifying protocols in this 1397/// interface type, or 0 if there are none. 1398inline unsigned ObjCInterfaceType::getNumProtocols() const { 1399 if (const ObjCQualifiedInterfaceType *QIT = 1400 dyn_cast<ObjCQualifiedInterfaceType>(this)) 1401 return QIT->getNumProtocols(); 1402 return 0; 1403} 1404 1405/// getProtocol - Return the specified qualifying protocol. 1406inline ObjCProtocolDecl *ObjCInterfaceType::getProtocol(unsigned i) const { 1407 return cast<ObjCQualifiedInterfaceType>(this)->getProtocol(i); 1408} 1409 1410 1411 1412/// ObjCQualifiedIdType - to represent id<protocol-list>. 1413/// 1414/// Duplicate protocols are removed and protocol list is canonicalized to be in 1415/// alphabetical order. 1416class ObjCQualifiedIdType : public Type, 1417 public llvm::FoldingSetNode { 1418 // List of protocols for this protocol conforming 'id' type 1419 // List is sorted on protocol name. No protocol is enterred more than once. 1420 llvm::SmallVector<ObjCProtocolDecl*, 8> Protocols; 1421 1422 ObjCQualifiedIdType(ObjCProtocolDecl **Protos, unsigned NumP) 1423 : Type(ObjCQualifiedId, QualType()/*these are always canonical*/, 1424 /*Dependent=*/false), 1425 Protocols(Protos, Protos+NumP) { } 1426 friend class ASTContext; // ASTContext creates these. 1427public: 1428 1429 ObjCProtocolDecl *getProtocols(unsigned i) const { 1430 return Protocols[i]; 1431 } 1432 unsigned getNumProtocols() const { 1433 return Protocols.size(); 1434 } 1435 ObjCProtocolDecl **getReferencedProtocols() { 1436 return &Protocols[0]; 1437 } 1438 1439 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 1440 qual_iterator qual_begin() const { return Protocols.begin(); } 1441 qual_iterator qual_end() const { return Protocols.end(); } 1442 1443 virtual void getAsStringInternal(std::string &InnerString) const; 1444 1445 void Profile(llvm::FoldingSetNodeID &ID); 1446 static void Profile(llvm::FoldingSetNodeID &ID, 1447 ObjCProtocolDecl **protocols, unsigned NumProtocols); 1448 1449 static bool classof(const Type *T) { 1450 return T->getTypeClass() == ObjCQualifiedId; 1451 } 1452 static bool classof(const ObjCQualifiedIdType *) { return true; } 1453 1454}; 1455 1456 1457// Inline function definitions. 1458 1459/// getUnqualifiedType - Return the type without any qualifiers. 1460inline QualType QualType::getUnqualifiedType() const { 1461 Type *TP = getTypePtr(); 1462 if (const ASQualType *ASQT = dyn_cast<ASQualType>(TP)) 1463 TP = ASQT->getBaseType(); 1464 return QualType(TP, 0); 1465} 1466 1467/// getAddressSpace - Return the address space of this type. 1468inline unsigned QualType::getAddressSpace() const { 1469 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 1470 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 1471 return AT->getElementType().getAddressSpace(); 1472 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 1473 return RT->getAddressSpace(); 1474 if (const ASQualType *ASQT = dyn_cast<ASQualType>(CT)) 1475 return ASQT->getAddressSpace(); 1476 return 0; 1477} 1478 1479/// isMoreQualifiedThan - Determine whether this type is more 1480/// qualified than the Other type. For example, "const volatile int" 1481/// is more qualified than "const int", "volatile int", and 1482/// "int". However, it is not more qualified than "const volatile 1483/// int". 1484inline bool QualType::isMoreQualifiedThan(QualType Other) const { 1485 // FIXME: Handle address spaces 1486 unsigned MyQuals = this->getCVRQualifiers(); 1487 unsigned OtherQuals = Other.getCVRQualifiers(); 1488 assert(this->getAddressSpace() == 0 && "Address space not checked"); 1489 assert(Other.getAddressSpace() == 0 && "Address space not checked"); 1490 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 1491} 1492 1493/// isAtLeastAsQualifiedAs - Determine whether this type is at last 1494/// as qualified as the Other type. For example, "const volatile 1495/// int" is at least as qualified as "const int", "volatile int", 1496/// "int", and "const volatile int". 1497inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 1498 // FIXME: Handle address spaces 1499 unsigned MyQuals = this->getCVRQualifiers(); 1500 unsigned OtherQuals = Other.getCVRQualifiers(); 1501 assert(this->getAddressSpace() == 0 && "Address space not checked"); 1502 assert(Other.getAddressSpace() == 0 && "Address space not checked"); 1503 return (MyQuals | OtherQuals) == MyQuals; 1504} 1505 1506/// getNonReferenceType - If Type is a reference type (e.g., const 1507/// int&), returns the type that the reference refers to ("const 1508/// int"). Otherwise, returns the type itself. This routine is used 1509/// throughout Sema to implement C++ 5p6: 1510/// 1511/// If an expression initially has the type "reference to T" (8.3.2, 1512/// 8.5.3), the type is adjusted to "T" prior to any further 1513/// analysis, the expression designates the object or function 1514/// denoted by the reference, and the expression is an lvalue. 1515inline QualType QualType::getNonReferenceType() const { 1516 if (const ReferenceType *RefType = (*this)->getAsReferenceType()) 1517 return RefType->getPointeeType(); 1518 else 1519 return *this; 1520} 1521 1522inline const TypedefType* Type::getAsTypedefType() const { 1523 return dyn_cast<TypedefType>(this); 1524} 1525inline const ObjCInterfaceType *Type::getAsPointerToObjCInterfaceType() const { 1526 if (const PointerType *PT = getAsPointerType()) 1527 return PT->getPointeeType()->getAsObjCInterfaceType(); 1528 return 0; 1529} 1530 1531// NOTE: All of these methods use "getUnqualifiedType" to strip off address 1532// space qualifiers if present. 1533inline bool Type::isFunctionType() const { 1534 return isa<FunctionType>(CanonicalType.getUnqualifiedType()); 1535} 1536inline bool Type::isPointerType() const { 1537 return isa<PointerType>(CanonicalType.getUnqualifiedType()); 1538} 1539inline bool Type::isBlockPointerType() const { 1540 return isa<BlockPointerType>(CanonicalType); 1541} 1542inline bool Type::isReferenceType() const { 1543 return isa<ReferenceType>(CanonicalType.getUnqualifiedType()); 1544} 1545inline bool Type::isPointerLikeType() const { 1546 return isa<PointerLikeType>(CanonicalType.getUnqualifiedType()); 1547} 1548inline bool Type::isFunctionPointerType() const { 1549 if (const PointerType* T = getAsPointerType()) 1550 return T->getPointeeType()->isFunctionType(); 1551 else 1552 return false; 1553} 1554inline bool Type::isArrayType() const { 1555 return isa<ArrayType>(CanonicalType.getUnqualifiedType()); 1556} 1557inline bool Type::isConstantArrayType() const { 1558 return isa<ConstantArrayType>(CanonicalType.getUnqualifiedType()); 1559} 1560inline bool Type::isIncompleteArrayType() const { 1561 return isa<IncompleteArrayType>(CanonicalType.getUnqualifiedType()); 1562} 1563inline bool Type::isVariableArrayType() const { 1564 return isa<VariableArrayType>(CanonicalType.getUnqualifiedType()); 1565} 1566inline bool Type::isDependentSizedArrayType() const { 1567 return isa<DependentSizedArrayType>(CanonicalType.getUnqualifiedType()); 1568} 1569inline bool Type::isRecordType() const { 1570 return isa<RecordType>(CanonicalType.getUnqualifiedType()); 1571} 1572inline bool Type::isAnyComplexType() const { 1573 return isa<ComplexType>(CanonicalType.getUnqualifiedType()); 1574} 1575inline bool Type::isVectorType() const { 1576 return isa<VectorType>(CanonicalType.getUnqualifiedType()); 1577} 1578inline bool Type::isExtVectorType() const { 1579 return isa<ExtVectorType>(CanonicalType.getUnqualifiedType()); 1580} 1581inline bool Type::isObjCInterfaceType() const { 1582 return isa<ObjCInterfaceType>(CanonicalType.getUnqualifiedType()); 1583} 1584inline bool Type::isObjCQualifiedInterfaceType() const { 1585 return isa<ObjCQualifiedInterfaceType>(CanonicalType.getUnqualifiedType()); 1586} 1587inline bool Type::isObjCQualifiedIdType() const { 1588 return isa<ObjCQualifiedIdType>(CanonicalType.getUnqualifiedType()); 1589} 1590inline bool Type::isTemplateTypeParmType() const { 1591 return isa<TemplateTypeParmType>(CanonicalType.getUnqualifiedType()); 1592} 1593 1594inline bool Type::isOverloadType() const { 1595 if (const BuiltinType *BT = getAsBuiltinType()) 1596 return BT->getKind() == BuiltinType::Overload; 1597 else 1598 return false; 1599} 1600 1601/// Insertion operator for diagnostics. This allows sending QualType's into a 1602/// diagnostic with <<. 1603inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 1604 QualType T) { 1605 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 1606 Diagnostic::ak_qualtype); 1607 return DB; 1608} 1609 1610} // end namespace clang 1611 1612#endif 1613