Type.h revision 79ae19a7c9421e17ba26ea9cbf5a7f4dcc015cde
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 "clang/Basic/IdentifierTable.h" 19#include "clang/AST/NestedNameSpecifier.h" 20#include "clang/AST/TemplateName.h" 21#include "llvm/Support/Casting.h" 22#include "llvm/ADT/APSInt.h" 23#include "llvm/ADT/FoldingSet.h" 24#include "llvm/ADT/PointerIntPair.h" 25#include "llvm/ADT/PointerUnion.h" 26 27using llvm::isa; 28using llvm::cast; 29using llvm::cast_or_null; 30using llvm::dyn_cast; 31using llvm::dyn_cast_or_null; 32namespace clang { class Type; } 33 34namespace llvm { 35 template <typename T> 36 class PointerLikeTypeTraits; 37 template<> 38 class PointerLikeTypeTraits< ::clang::Type*> { 39 public: 40 static inline void *getAsVoidPointer(::clang::Type *P) { return P; } 41 static inline ::clang::Type *getFromVoidPointer(void *P) { 42 return static_cast< ::clang::Type*>(P); 43 } 44 enum { NumLowBitsAvailable = 3 }; 45 }; 46} 47 48namespace clang { 49 class ASTContext; 50 class TypedefDecl; 51 class TemplateDecl; 52 class TemplateTypeParmDecl; 53 class NonTypeTemplateParmDecl; 54 class TemplateTemplateParmDecl; 55 class TagDecl; 56 class RecordDecl; 57 class CXXRecordDecl; 58 class EnumDecl; 59 class FieldDecl; 60 class ObjCInterfaceDecl; 61 class ObjCProtocolDecl; 62 class ObjCMethodDecl; 63 class Expr; 64 class Stmt; 65 class SourceLocation; 66 class StmtIteratorBase; 67 class TemplateArgument; 68 class QualifiedNameType; 69 struct PrintingPolicy; 70 71 // Provide forward declarations for all of the *Type classes 72#define TYPE(Class, Base) class Class##Type; 73#include "clang/AST/TypeNodes.def" 74 75/// QualType - For efficiency, we don't store CVR-qualified types as nodes on 76/// their own: instead each reference to a type stores the qualifiers. This 77/// greatly reduces the number of nodes we need to allocate for types (for 78/// example we only need one for 'int', 'const int', 'volatile int', 79/// 'const volatile int', etc). 80/// 81/// As an added efficiency bonus, instead of making this a pair, we just store 82/// the three bits we care about in the low bits of the pointer. To handle the 83/// packing/unpacking, we make QualType be a simple wrapper class that acts like 84/// a smart pointer. 85class QualType { 86 llvm::PointerIntPair<Type*, 3> Value; 87public: 88 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 89 Const = 0x1, 90 Restrict = 0x2, 91 Volatile = 0x4, 92 CVRFlags = Const|Restrict|Volatile 93 }; 94 95 enum GCAttrTypes { 96 GCNone = 0, 97 Weak, 98 Strong 99 }; 100 101 QualType() {} 102 103 QualType(const Type *Ptr, unsigned Quals) 104 : Value(const_cast<Type*>(Ptr), Quals) {} 105 106 unsigned getCVRQualifiers() const { return Value.getInt(); } 107 void setCVRQualifiers(unsigned Quals) { Value.setInt(Quals); } 108 Type *getTypePtr() const { return Value.getPointer(); } 109 110 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 111 static QualType getFromOpaquePtr(void *Ptr) { 112 QualType T; 113 T.Value.setFromOpaqueValue(Ptr); 114 return T; 115 } 116 117 Type &operator*() const { 118 return *getTypePtr(); 119 } 120 121 Type *operator->() const { 122 return getTypePtr(); 123 } 124 125 /// isNull - Return true if this QualType doesn't point to a type yet. 126 bool isNull() const { 127 return getTypePtr() == 0; 128 } 129 130 bool isConstQualified() const { 131 return (getCVRQualifiers() & Const) ? true : false; 132 } 133 bool isVolatileQualified() const { 134 return (getCVRQualifiers() & Volatile) ? true : false; 135 } 136 bool isRestrictQualified() const { 137 return (getCVRQualifiers() & Restrict) ? true : false; 138 } 139 140 bool isConstant(ASTContext& Ctx) const; 141 142 /// addConst/addVolatile/addRestrict - add the specified type qual to this 143 /// QualType. 144 void addConst() { Value.setInt(Value.getInt() | Const); } 145 void addVolatile() { Value.setInt(Value.getInt() | Volatile); } 146 void addRestrict() { Value.setInt(Value.getInt() | Restrict); } 147 148 void removeConst() { Value.setInt(Value.getInt() & ~Const); } 149 void removeVolatile() { Value.setInt(Value.getInt() & ~Volatile); } 150 void removeRestrict() { Value.setInt(Value.getInt() & ~Restrict); } 151 152 QualType getQualifiedType(unsigned TQs) const { 153 return QualType(getTypePtr(), TQs); 154 } 155 QualType getWithAdditionalQualifiers(unsigned TQs) const { 156 return QualType(getTypePtr(), TQs|getCVRQualifiers()); 157 } 158 159 QualType withConst() const { return getWithAdditionalQualifiers(Const); } 160 QualType withVolatile() const { return getWithAdditionalQualifiers(Volatile);} 161 QualType withRestrict() const { return getWithAdditionalQualifiers(Restrict);} 162 163 QualType getUnqualifiedType() const; 164 bool isMoreQualifiedThan(QualType Other) const; 165 bool isAtLeastAsQualifiedAs(QualType Other) const; 166 QualType getNonReferenceType() const; 167 168 /// getDesugaredType - Return the specified type with any "sugar" removed from 169 /// the type. This takes off typedefs, typeof's etc. If the outer level of 170 /// the type is already concrete, it returns it unmodified. This is similar 171 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 172 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 173 /// concrete. 174 QualType getDesugaredType(bool ForDisplay = false) const; 175 176 /// operator==/!= - Indicate whether the specified types and qualifiers are 177 /// identical. 178 bool operator==(const QualType &RHS) const { 179 return Value == RHS.Value; 180 } 181 bool operator!=(const QualType &RHS) const { 182 return Value != RHS.Value; 183 } 184 std::string getAsString() const; 185 186 std::string getAsString(const PrintingPolicy &Policy) const { 187 std::string S; 188 getAsStringInternal(S, Policy); 189 return S; 190 } 191 void getAsStringInternal(std::string &Str, 192 const PrintingPolicy &Policy) const; 193 194 void dump(const char *s) const; 195 void dump() const; 196 197 void Profile(llvm::FoldingSetNodeID &ID) const { 198 ID.AddPointer(getAsOpaquePtr()); 199 } 200 201public: 202 203 /// getAddressSpace - Return the address space of this type. 204 inline unsigned getAddressSpace() const; 205 206 /// GCAttrTypesAttr - Returns gc attribute of this type. 207 inline QualType::GCAttrTypes getObjCGCAttr() const; 208 209 /// isObjCGCWeak true when Type is objc's weak. 210 bool isObjCGCWeak() const { 211 return getObjCGCAttr() == Weak; 212 } 213 214 /// isObjCGCStrong true when Type is objc's strong. 215 bool isObjCGCStrong() const { 216 return getObjCGCAttr() == Strong; 217 } 218}; 219 220} // end clang. 221 222namespace llvm { 223/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 224/// to a specific Type class. 225template<> struct simplify_type<const ::clang::QualType> { 226 typedef ::clang::Type* SimpleType; 227 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 228 return Val.getTypePtr(); 229 } 230}; 231template<> struct simplify_type< ::clang::QualType> 232 : public simplify_type<const ::clang::QualType> {}; 233 234// Teach SmallPtrSet that QualType is "basically a pointer". 235template<> 236class PointerLikeTypeTraits<clang::QualType> { 237public: 238 static inline void *getAsVoidPointer(clang::QualType P) { 239 return P.getAsOpaquePtr(); 240 } 241 static inline clang::QualType getFromVoidPointer(void *P) { 242 return clang::QualType::getFromOpaquePtr(P); 243 } 244 // CVR qualifiers go in low bits. 245 enum { NumLowBitsAvailable = 0 }; 246}; 247} // end namespace llvm 248 249namespace clang { 250 251/// Type - This is the base class of the type hierarchy. A central concept 252/// with types is that each type always has a canonical type. A canonical type 253/// is the type with any typedef names stripped out of it or the types it 254/// references. For example, consider: 255/// 256/// typedef int foo; 257/// typedef foo* bar; 258/// 'int *' 'foo *' 'bar' 259/// 260/// There will be a Type object created for 'int'. Since int is canonical, its 261/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 262/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 263/// there is a PointerType that represents 'int*', which, like 'int', is 264/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 265/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 266/// is also 'int*'. 267/// 268/// Non-canonical types are useful for emitting diagnostics, without losing 269/// information about typedefs being used. Canonical types are useful for type 270/// comparisons (they allow by-pointer equality tests) and useful for reasoning 271/// about whether something has a particular form (e.g. is a function type), 272/// because they implicitly, recursively, strip all typedefs out of a type. 273/// 274/// Types, once created, are immutable. 275/// 276class Type { 277public: 278 enum TypeClass { 279#define TYPE(Class, Base) Class, 280#define ABSTRACT_TYPE(Class, Base) 281#include "clang/AST/TypeNodes.def" 282 TagFirst = Record, TagLast = Enum 283 }; 284 285private: 286 QualType CanonicalType; 287 288 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 289 bool Dependent : 1; 290 291 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 292 /// Note that this should stay at the end of the ivars for Type so that 293 /// subclasses can pack their bitfields into the same word. 294 unsigned TC : 6; 295 296 Type(const Type&); // DO NOT IMPLEMENT. 297 void operator=(const Type&); // DO NOT IMPLEMENT. 298protected: 299 // silence VC++ warning C4355: 'this' : used in base member initializer list 300 Type *this_() { return this; } 301 Type(TypeClass tc, QualType Canonical, bool dependent) 302 : CanonicalType(Canonical.isNull() ? QualType(this_(), 0) : Canonical), 303 Dependent(dependent), TC(tc) {} 304 virtual ~Type() {} 305 virtual void Destroy(ASTContext& C); 306 friend class ASTContext; 307 308public: 309 TypeClass getTypeClass() const { return static_cast<TypeClass>(TC); } 310 311 bool isCanonical() const { return CanonicalType.getTypePtr() == this; } 312 313 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 314 /// object types, function types, and incomplete types. 315 316 /// \brief Determines whether the type describes an object in memory. 317 /// 318 /// Note that this definition of object type corresponds to the C++ 319 /// definition of object type, which includes incomplete types, as 320 /// opposed to the C definition (which does not include incomplete 321 /// types). 322 bool isObjectType() const; 323 324 /// isIncompleteType - Return true if this is an incomplete type. 325 /// A type that can describe objects, but which lacks information needed to 326 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 327 /// routine will need to determine if the size is actually required. 328 bool isIncompleteType() const; 329 330 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 331 /// type, in other words, not a function type. 332 bool isIncompleteOrObjectType() const { 333 return !isFunctionType(); 334 } 335 336 /// isPODType - Return true if this is a plain-old-data type (C++ 3.9p10). 337 bool isPODType() const; 338 339 /// isVariablyModifiedType (C99 6.7.5.2p2) - Return true for variable array 340 /// types that have a non-constant expression. This does not include "[]". 341 bool isVariablyModifiedType() const; 342 343 /// Helper methods to distinguish type categories. All type predicates 344 /// operate on the canonical type, ignoring typedefs and qualifiers. 345 346 /// isSpecificBuiltinType - Test for a particular builtin type. 347 bool isSpecificBuiltinType(unsigned K) const; 348 349 /// isIntegerType() does *not* include complex integers (a GCC extension). 350 /// isComplexIntegerType() can be used to test for complex integers. 351 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 352 bool isEnumeralType() const; 353 bool isBooleanType() const; 354 bool isCharType() const; 355 bool isWideCharType() const; 356 bool isIntegralType() const; 357 358 /// Floating point categories. 359 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 360 /// isComplexType() does *not* include complex integers (a GCC extension). 361 /// isComplexIntegerType() can be used to test for complex integers. 362 bool isComplexType() const; // C99 6.2.5p11 (complex) 363 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 364 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 365 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 366 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 367 bool isVoidType() const; // C99 6.2.5p19 368 bool isDerivedType() const; // C99 6.2.5p20 369 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 370 bool isAggregateType() const; 371 372 // Type Predicates: Check to see if this type is structurally the specified 373 // type, ignoring typedefs and qualifiers. 374 bool isFunctionType() const; 375 bool isFunctionNoProtoType() const { return getAsFunctionNoProtoType() != 0; } 376 bool isFunctionProtoType() const { return getAsFunctionProtoType() != 0; } 377 bool isPointerType() const; 378 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 379 bool isBlockPointerType() const; 380 bool isVoidPointerType() const; 381 bool isReferenceType() const; 382 bool isLValueReferenceType() const; 383 bool isRValueReferenceType() const; 384 bool isFunctionPointerType() const; 385 bool isMemberPointerType() const; 386 bool isMemberFunctionPointerType() const; 387 bool isArrayType() const; 388 bool isConstantArrayType() const; 389 bool isIncompleteArrayType() const; 390 bool isVariableArrayType() const; 391 bool isDependentSizedArrayType() const; 392 bool isRecordType() const; 393 bool isClassType() const; 394 bool isStructureType() const; 395 bool isUnionType() const; 396 bool isComplexIntegerType() const; // GCC _Complex integer type. 397 bool isVectorType() const; // GCC vector type. 398 bool isExtVectorType() const; // Extended vector type. 399 bool isObjCObjectPointerType() const; // Pointer to *any* ObjC object. 400 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 401 // for the common case. 402 bool isObjCInterfaceType() const; // NSString or NSString<foo> 403 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 404 bool isObjCQualifiedIdType() const; // id<foo> 405 bool isObjCIdType() const; // id 406 bool isObjCClassType() const; // Class 407 bool isTemplateTypeParmType() const; // C++ template type parameter 408 bool isNullPtrType() const; // C++0x nullptr_t 409 410 /// isDependentType - Whether this type is a dependent type, meaning 411 /// that its definition somehow depends on a template parameter 412 /// (C++ [temp.dep.type]). 413 bool isDependentType() const { return Dependent; } 414 bool isOverloadableType() const; 415 416 /// hasPointerRepresentation - Whether this type is represented 417 /// natively as a pointer; this includes pointers, references, block 418 /// pointers, and Objective-C interface, qualified id, and qualified 419 /// interface types, as well as nullptr_t. 420 bool hasPointerRepresentation() const; 421 422 /// hasObjCPointerRepresentation - Whether this type can represent 423 /// an objective pointer type for the purpose of GC'ability 424 bool hasObjCPointerRepresentation() const; 425 426 // Type Checking Functions: Check to see if this type is structurally the 427 // specified type, ignoring typedefs and qualifiers, and return a pointer to 428 // the best type we can. 429 const BuiltinType *getAsBuiltinType() const; 430 const FunctionType *getAsFunctionType() const; 431 const FunctionNoProtoType *getAsFunctionNoProtoType() const; 432 const FunctionProtoType *getAsFunctionProtoType() const; 433 const PointerType *getAsPointerType() const; 434 const BlockPointerType *getAsBlockPointerType() const; 435 const ReferenceType *getAsReferenceType() const; 436 const LValueReferenceType *getAsLValueReferenceType() const; 437 const RValueReferenceType *getAsRValueReferenceType() const; 438 const MemberPointerType *getAsMemberPointerType() const; 439 const TagType *getAsTagType() const; 440 const RecordType *getAsRecordType() const; 441 const RecordType *getAsStructureType() const; 442 /// NOTE: getAs*ArrayType are methods on ASTContext. 443 const TypedefType *getAsTypedefType() const; 444 const RecordType *getAsUnionType() const; 445 const EnumType *getAsEnumType() const; 446 const VectorType *getAsVectorType() const; // GCC vector type. 447 const ComplexType *getAsComplexType() const; 448 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 449 const ExtVectorType *getAsExtVectorType() const; // Extended vector type. 450 const ObjCObjectPointerType *getAsObjCObjectPointerType() const; 451 // The following is a convenience method that returns an ObjCObjectPointerType 452 // for object declared using an interface. 453 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 454 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 455 const ObjCInterfaceType *getAsObjCInterfaceType() const; 456 const ObjCQualifiedInterfaceType *getAsObjCQualifiedInterfaceType() const; 457 const TemplateTypeParmType *getAsTemplateTypeParmType() const; 458 459 const TemplateSpecializationType * 460 getAsTemplateSpecializationType() const; 461 462 /// getAsPointerToObjCInterfaceType - If this is a pointer to an ObjC 463 /// interface, return the interface type, otherwise return null. 464 const ObjCInterfaceType *getAsPointerToObjCInterfaceType() const; 465 466 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 467 /// element type of the array, potentially with type qualifiers missing. 468 /// This method should never be used when type qualifiers are meaningful. 469 const Type *getArrayElementTypeNoTypeQual() const; 470 471 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 472 /// pointer, this returns the respective pointee. 473 QualType getPointeeType() const; 474 475 /// getDesugaredType - Return the specified type with any "sugar" removed from 476 /// the type. This takes off typedefs, typeof's etc. If the outer level of 477 /// the type is already concrete, it returns it unmodified. This is similar 478 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 479 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 480 /// concrete. 481 QualType getDesugaredType(bool ForDisplay = false) const; 482 483 /// More type predicates useful for type checking/promotion 484 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 485 486 /// isSignedIntegerType - Return true if this is an integer type that is 487 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 488 /// an enum decl which has a signed representation, or a vector of signed 489 /// integer element type. 490 bool isSignedIntegerType() const; 491 492 /// isUnsignedIntegerType - Return true if this is an integer type that is 493 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 494 /// decl which has an unsigned representation, or a vector of unsigned integer 495 /// element type. 496 bool isUnsignedIntegerType() const; 497 498 /// isConstantSizeType - Return true if this is not a variable sized type, 499 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 500 /// incomplete types. 501 bool isConstantSizeType() const; 502 503 /// isSpecifierType - Returns true if this type can be represented by some 504 /// set of type specifiers. 505 bool isSpecifierType() const; 506 507 QualType getCanonicalTypeInternal() const { return CanonicalType; } 508 void dump() const; 509 virtual void getAsStringInternal(std::string &InnerString, 510 const PrintingPolicy &Policy) const = 0; 511 static bool classof(const Type *) { return true; } 512}; 513 514/// ExtQualType - TR18037 (C embedded extensions) 6.2.5p26 515/// This supports all kinds of type attributes; including, 516/// address space qualified types, objective-c's __weak and 517/// __strong attributes. 518/// 519class ExtQualType : public Type, public llvm::FoldingSetNode { 520 /// BaseType - This is the underlying type that this qualifies. All CVR 521 /// qualifiers are stored on the QualType that references this type, so we 522 /// can't have any here. 523 Type *BaseType; 524 525 /// Address Space ID - The address space ID this type is qualified with. 526 unsigned AddressSpace; 527 /// GC __weak/__strong attributes 528 QualType::GCAttrTypes GCAttrType; 529 530 ExtQualType(Type *Base, QualType CanonicalPtr, unsigned AddrSpace, 531 QualType::GCAttrTypes gcAttr) : 532 Type(ExtQual, CanonicalPtr, Base->isDependentType()), BaseType(Base), 533 AddressSpace(AddrSpace), GCAttrType(gcAttr) { 534 assert(!isa<ExtQualType>(BaseType) && 535 "Cannot have ExtQualType of ExtQualType"); 536 } 537 friend class ASTContext; // ASTContext creates these. 538public: 539 Type *getBaseType() const { return BaseType; } 540 QualType::GCAttrTypes getObjCGCAttr() const { return GCAttrType; } 541 unsigned getAddressSpace() const { return AddressSpace; } 542 543 virtual void getAsStringInternal(std::string &InnerString, 544 const PrintingPolicy &Policy) const; 545 546 void Profile(llvm::FoldingSetNodeID &ID) { 547 Profile(ID, getBaseType(), AddressSpace, GCAttrType); 548 } 549 static void Profile(llvm::FoldingSetNodeID &ID, Type *Base, 550 unsigned AddrSpace, QualType::GCAttrTypes gcAttr) { 551 ID.AddPointer(Base); 552 ID.AddInteger(AddrSpace); 553 ID.AddInteger(gcAttr); 554 } 555 556 static bool classof(const Type *T) { return T->getTypeClass() == ExtQual; } 557 static bool classof(const ExtQualType *) { return true; } 558}; 559 560 561/// BuiltinType - This class is used for builtin types like 'int'. Builtin 562/// types are always canonical and have a literal name field. 563class BuiltinType : public Type { 564public: 565 enum Kind { 566 Void, 567 568 Bool, // This is bool and/or _Bool. 569 Char_U, // This is 'char' for targets where char is unsigned. 570 UChar, // This is explicitly qualified unsigned char. 571 Char16, // This is 'char16_t' for C++. 572 Char32, // This is 'char32_t' for C++. 573 UShort, 574 UInt, 575 ULong, 576 ULongLong, 577 UInt128, // __uint128_t 578 579 Char_S, // This is 'char' for targets where char is signed. 580 SChar, // This is explicitly qualified signed char. 581 WChar, // This is 'wchar_t' for C++. 582 Short, 583 Int, 584 Long, 585 LongLong, 586 Int128, // __int128_t 587 588 Float, Double, LongDouble, 589 590 NullPtr, // This is the type of C++0x 'nullptr'. 591 592 Overload, // This represents the type of an overloaded function declaration. 593 Dependent, // This represents the type of a type-dependent expression. 594 595 UndeducedAuto // In C++0x, this represents the type of an auto variable 596 // that has not been deduced yet. 597 }; 598private: 599 Kind TypeKind; 600public: 601 BuiltinType(Kind K) 602 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent)), 603 TypeKind(K) {} 604 605 Kind getKind() const { return TypeKind; } 606 const char *getName(const LangOptions &LO) const; 607 608 virtual void getAsStringInternal(std::string &InnerString, 609 const PrintingPolicy &Policy) const; 610 611 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 612 static bool classof(const BuiltinType *) { return true; } 613}; 614 615/// FixedWidthIntType - Used for arbitrary width types that we either don't 616/// want to or can't map to named integer types. These always have a lower 617/// integer rank than builtin types of the same width. 618class FixedWidthIntType : public Type { 619private: 620 unsigned Width; 621 bool Signed; 622public: 623 FixedWidthIntType(unsigned W, bool S) : Type(FixedWidthInt, QualType(), false), 624 Width(W), Signed(S) {} 625 626 unsigned getWidth() const { return Width; } 627 bool isSigned() const { return Signed; } 628 const char *getName() const; 629 630 virtual void getAsStringInternal(std::string &InnerString, 631 const PrintingPolicy &Policy) const; 632 633 static bool classof(const Type *T) { return T->getTypeClass() == FixedWidthInt; } 634 static bool classof(const FixedWidthIntType *) { return true; } 635}; 636 637/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 638/// types (_Complex float etc) as well as the GCC integer complex extensions. 639/// 640class ComplexType : public Type, public llvm::FoldingSetNode { 641 QualType ElementType; 642 ComplexType(QualType Element, QualType CanonicalPtr) : 643 Type(Complex, CanonicalPtr, Element->isDependentType()), 644 ElementType(Element) { 645 } 646 friend class ASTContext; // ASTContext creates these. 647public: 648 QualType getElementType() const { return ElementType; } 649 650 virtual void getAsStringInternal(std::string &InnerString, 651 const PrintingPolicy &Policy) const; 652 653 void Profile(llvm::FoldingSetNodeID &ID) { 654 Profile(ID, getElementType()); 655 } 656 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 657 ID.AddPointer(Element.getAsOpaquePtr()); 658 } 659 660 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 661 static bool classof(const ComplexType *) { return true; } 662}; 663 664/// PointerType - C99 6.7.5.1 - Pointer Declarators. 665/// 666class PointerType : public Type, public llvm::FoldingSetNode { 667 QualType PointeeType; 668 669 PointerType(QualType Pointee, QualType CanonicalPtr) : 670 Type(Pointer, CanonicalPtr, Pointee->isDependentType()), PointeeType(Pointee) { 671 } 672 friend class ASTContext; // ASTContext creates these. 673public: 674 675 virtual void getAsStringInternal(std::string &InnerString, 676 const PrintingPolicy &Policy) const; 677 678 QualType getPointeeType() const { return PointeeType; } 679 680 void Profile(llvm::FoldingSetNodeID &ID) { 681 Profile(ID, getPointeeType()); 682 } 683 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 684 ID.AddPointer(Pointee.getAsOpaquePtr()); 685 } 686 687 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 688 static bool classof(const PointerType *) { return true; } 689}; 690 691/// BlockPointerType - pointer to a block type. 692/// This type is to represent types syntactically represented as 693/// "void (^)(int)", etc. Pointee is required to always be a function type. 694/// 695class BlockPointerType : public Type, public llvm::FoldingSetNode { 696 QualType PointeeType; // Block is some kind of pointer type 697 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 698 Type(BlockPointer, CanonicalCls, Pointee->isDependentType()), 699 PointeeType(Pointee) { 700 } 701 friend class ASTContext; // ASTContext creates these. 702public: 703 704 // Get the pointee type. Pointee is required to always be a function type. 705 QualType getPointeeType() const { return PointeeType; } 706 707 virtual void getAsStringInternal(std::string &InnerString, 708 const PrintingPolicy &Policy) const; 709 710 void Profile(llvm::FoldingSetNodeID &ID) { 711 Profile(ID, getPointeeType()); 712 } 713 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 714 ID.AddPointer(Pointee.getAsOpaquePtr()); 715 } 716 717 static bool classof(const Type *T) { 718 return T->getTypeClass() == BlockPointer; 719 } 720 static bool classof(const BlockPointerType *) { return true; } 721}; 722 723/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 724/// 725class ReferenceType : public Type, public llvm::FoldingSetNode { 726 QualType PointeeType; 727 728protected: 729 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef) : 730 Type(tc, CanonicalRef, Referencee->isDependentType()), 731 PointeeType(Referencee) { 732 } 733public: 734 QualType getPointeeType() const { return PointeeType; } 735 736 void Profile(llvm::FoldingSetNodeID &ID) { 737 Profile(ID, getPointeeType()); 738 } 739 static void Profile(llvm::FoldingSetNodeID &ID, QualType Referencee) { 740 ID.AddPointer(Referencee.getAsOpaquePtr()); 741 } 742 743 static bool classof(const Type *T) { 744 return T->getTypeClass() == LValueReference || 745 T->getTypeClass() == RValueReference; 746 } 747 static bool classof(const ReferenceType *) { return true; } 748}; 749 750/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 751/// 752class LValueReferenceType : public ReferenceType { 753 LValueReferenceType(QualType Referencee, QualType CanonicalRef) : 754 ReferenceType(LValueReference, Referencee, CanonicalRef) { 755 } 756 friend class ASTContext; // ASTContext creates these 757public: 758 virtual void getAsStringInternal(std::string &InnerString, 759 const PrintingPolicy &Policy) const; 760 761 static bool classof(const Type *T) { 762 return T->getTypeClass() == LValueReference; 763 } 764 static bool classof(const LValueReferenceType *) { return true; } 765}; 766 767/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 768/// 769class RValueReferenceType : public ReferenceType { 770 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 771 ReferenceType(RValueReference, Referencee, CanonicalRef) { 772 } 773 friend class ASTContext; // ASTContext creates these 774public: 775 virtual void getAsStringInternal(std::string &InnerString, 776 const PrintingPolicy &Policy) const; 777 778 static bool classof(const Type *T) { 779 return T->getTypeClass() == RValueReference; 780 } 781 static bool classof(const RValueReferenceType *) { return true; } 782}; 783 784/// MemberPointerType - C++ 8.3.3 - Pointers to members 785/// 786class MemberPointerType : public Type, public llvm::FoldingSetNode { 787 QualType PointeeType; 788 /// The class of which the pointee is a member. Must ultimately be a 789 /// RecordType, but could be a typedef or a template parameter too. 790 const Type *Class; 791 792 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 793 Type(MemberPointer, CanonicalPtr, 794 Cls->isDependentType() || Pointee->isDependentType()), 795 PointeeType(Pointee), Class(Cls) { 796 } 797 friend class ASTContext; // ASTContext creates these. 798public: 799 800 QualType getPointeeType() const { return PointeeType; } 801 802 const Type *getClass() const { return Class; } 803 804 virtual void getAsStringInternal(std::string &InnerString, 805 const PrintingPolicy &Policy) const; 806 807 void Profile(llvm::FoldingSetNodeID &ID) { 808 Profile(ID, getPointeeType(), getClass()); 809 } 810 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 811 const Type *Class) { 812 ID.AddPointer(Pointee.getAsOpaquePtr()); 813 ID.AddPointer(Class); 814 } 815 816 static bool classof(const Type *T) { 817 return T->getTypeClass() == MemberPointer; 818 } 819 static bool classof(const MemberPointerType *) { return true; } 820}; 821 822/// ArrayType - C99 6.7.5.2 - Array Declarators. 823/// 824class ArrayType : public Type, public llvm::FoldingSetNode { 825public: 826 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 827 /// an array with a static size (e.g. int X[static 4]), or an array 828 /// with a star size (e.g. int X[*]). 829 /// 'static' is only allowed on function parameters. 830 enum ArraySizeModifier { 831 Normal, Static, Star 832 }; 833private: 834 /// ElementType - The element type of the array. 835 QualType ElementType; 836 837 // NOTE: VC++ treats enums as signed, avoid using the ArraySizeModifier enum 838 /// NOTE: These fields are packed into the bitfields space in the Type class. 839 unsigned SizeModifier : 2; 840 841 /// IndexTypeQuals - Capture qualifiers in declarations like: 842 /// 'int X[static restrict 4]'. For function parameters only. 843 unsigned IndexTypeQuals : 3; 844 845protected: 846 // C++ [temp.dep.type]p1: 847 // A type is dependent if it is... 848 // - an array type constructed from any dependent type or whose 849 // size is specified by a constant expression that is 850 // value-dependent, 851 ArrayType(TypeClass tc, QualType et, QualType can, 852 ArraySizeModifier sm, unsigned tq) 853 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray), 854 ElementType(et), SizeModifier(sm), IndexTypeQuals(tq) {} 855 856 friend class ASTContext; // ASTContext creates these. 857public: 858 QualType getElementType() const { return ElementType; } 859 ArraySizeModifier getSizeModifier() const { 860 return ArraySizeModifier(SizeModifier); 861 } 862 unsigned getIndexTypeQualifier() const { return IndexTypeQuals; } 863 864 static bool classof(const Type *T) { 865 return T->getTypeClass() == ConstantArray || 866 T->getTypeClass() == ConstantArrayWithExpr || 867 T->getTypeClass() == ConstantArrayWithoutExpr || 868 T->getTypeClass() == VariableArray || 869 T->getTypeClass() == IncompleteArray || 870 T->getTypeClass() == DependentSizedArray; 871 } 872 static bool classof(const ArrayType *) { return true; } 873}; 874 875/// ConstantArrayType - This class represents the canonical version of 876/// C arrays with a specified constant size. For example, the canonical 877/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 878/// type is 'int' and the size is 404. 879class ConstantArrayType : public ArrayType { 880 llvm::APInt Size; // Allows us to unique the type. 881 882 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 883 ArraySizeModifier sm, unsigned tq) 884 : ArrayType(ConstantArray, et, can, sm, tq), 885 Size(size) {} 886protected: 887 ConstantArrayType(TypeClass tc, QualType et, QualType can, 888 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 889 : ArrayType(tc, et, can, sm, tq), Size(size) {} 890 friend class ASTContext; // ASTContext creates these. 891public: 892 const llvm::APInt &getSize() const { return Size; } 893 virtual void getAsStringInternal(std::string &InnerString, 894 const PrintingPolicy &Policy) const; 895 896 void Profile(llvm::FoldingSetNodeID &ID) { 897 Profile(ID, getElementType(), getSize(), 898 getSizeModifier(), getIndexTypeQualifier()); 899 } 900 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 901 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 902 unsigned TypeQuals) { 903 ID.AddPointer(ET.getAsOpaquePtr()); 904 ID.AddInteger(ArraySize.getZExtValue()); 905 ID.AddInteger(SizeMod); 906 ID.AddInteger(TypeQuals); 907 } 908 static bool classof(const Type *T) { 909 return T->getTypeClass() == ConstantArray || 910 T->getTypeClass() == ConstantArrayWithExpr || 911 T->getTypeClass() == ConstantArrayWithoutExpr; 912 } 913 static bool classof(const ConstantArrayType *) { return true; } 914}; 915 916/// ConstantArrayWithExprType - This class represents C arrays with a 917/// constant size specified by means of an integer constant expression. 918/// For example 'int A[sizeof(int)]' has ConstantArrayWithExprType where 919/// the element type is 'int' and the size expression is 'sizeof(int)'. 920/// These types are non-canonical. 921class ConstantArrayWithExprType : public ConstantArrayType { 922 /// SizeExpr - The ICE occurring in the concrete syntax. 923 Expr *SizeExpr; 924 /// Brackets - The left and right array brackets. 925 SourceRange Brackets; 926 927 ConstantArrayWithExprType(QualType et, QualType can, 928 const llvm::APInt &size, Expr *e, 929 ArraySizeModifier sm, unsigned tq, 930 SourceRange brackets) 931 : ConstantArrayType(ConstantArrayWithExpr, et, can, size, sm, tq), 932 SizeExpr(e), Brackets(brackets) {} 933 friend class ASTContext; // ASTContext creates these. 934 virtual void Destroy(ASTContext& C); 935 936public: 937 Expr *getSizeExpr() const { return SizeExpr; } 938 SourceRange getBracketsRange() const { return Brackets; } 939 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 940 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 941 942 virtual void getAsStringInternal(std::string &InnerString, 943 const PrintingPolicy &Policy) const; 944 945 static bool classof(const Type *T) { 946 return T->getTypeClass() == ConstantArrayWithExpr; 947 } 948 static bool classof(const ConstantArrayWithExprType *) { return true; } 949 950 void Profile(llvm::FoldingSetNodeID &ID) { 951 assert(0 && "Cannot unique ConstantArrayWithExprTypes."); 952 } 953}; 954 955/// ConstantArrayWithoutExprType - This class represents C arrays with a 956/// constant size that was not specified by an integer constant expression, 957/// but inferred by static semantics. 958/// For example 'int A[] = { 0, 1, 2 }' has ConstantArrayWithoutExprType. 959/// These types are non-canonical: the corresponding canonical type, 960/// having the size specified in an APInt object, is a ConstantArrayType. 961class ConstantArrayWithoutExprType : public ConstantArrayType { 962 963 ConstantArrayWithoutExprType(QualType et, QualType can, 964 const llvm::APInt &size, 965 ArraySizeModifier sm, unsigned tq) 966 : ConstantArrayType(ConstantArrayWithoutExpr, et, can, size, sm, tq) {} 967 friend class ASTContext; // ASTContext creates these. 968 969public: 970 virtual void getAsStringInternal(std::string &InnerString, 971 const PrintingPolicy &Policy) const; 972 973 static bool classof(const Type *T) { 974 return T->getTypeClass() == ConstantArrayWithoutExpr; 975 } 976 static bool classof(const ConstantArrayWithoutExprType *) { return true; } 977 978 void Profile(llvm::FoldingSetNodeID &ID) { 979 assert(0 && "Cannot unique ConstantArrayWithoutExprTypes."); 980 } 981}; 982 983/// IncompleteArrayType - This class represents C arrays with an unspecified 984/// size. For example 'int A[]' has an IncompleteArrayType where the element 985/// type is 'int' and the size is unspecified. 986class IncompleteArrayType : public ArrayType { 987 988 IncompleteArrayType(QualType et, QualType can, 989 ArraySizeModifier sm, unsigned tq) 990 : ArrayType(IncompleteArray, et, can, sm, tq) {} 991 friend class ASTContext; // ASTContext creates these. 992public: 993 virtual void getAsStringInternal(std::string &InnerString, 994 const PrintingPolicy &Policy) const; 995 996 static bool classof(const Type *T) { 997 return T->getTypeClass() == IncompleteArray; 998 } 999 static bool classof(const IncompleteArrayType *) { return true; } 1000 1001 friend class StmtIteratorBase; 1002 1003 void Profile(llvm::FoldingSetNodeID &ID) { 1004 Profile(ID, getElementType(), getSizeModifier(), getIndexTypeQualifier()); 1005 } 1006 1007 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1008 ArraySizeModifier SizeMod, unsigned TypeQuals) { 1009 ID.AddPointer(ET.getAsOpaquePtr()); 1010 ID.AddInteger(SizeMod); 1011 ID.AddInteger(TypeQuals); 1012 } 1013}; 1014 1015/// VariableArrayType - This class represents C arrays with a specified size 1016/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 1017/// Since the size expression is an arbitrary expression, we store it as such. 1018/// 1019/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 1020/// should not be: two lexically equivalent variable array types could mean 1021/// different things, for example, these variables do not have the same type 1022/// dynamically: 1023/// 1024/// void foo(int x) { 1025/// int Y[x]; 1026/// ++x; 1027/// int Z[x]; 1028/// } 1029/// 1030class VariableArrayType : public ArrayType { 1031 /// SizeExpr - An assignment expression. VLA's are only permitted within 1032 /// a function block. 1033 Stmt *SizeExpr; 1034 /// Brackets - The left and right array brackets. 1035 SourceRange Brackets; 1036 1037 VariableArrayType(QualType et, QualType can, Expr *e, 1038 ArraySizeModifier sm, unsigned tq, 1039 SourceRange brackets) 1040 : ArrayType(VariableArray, et, can, sm, tq), 1041 SizeExpr((Stmt*) e), Brackets(brackets) {} 1042 friend class ASTContext; // ASTContext creates these. 1043 virtual void Destroy(ASTContext& C); 1044 1045public: 1046 Expr *getSizeExpr() const { 1047 // We use C-style casts instead of cast<> here because we do not wish 1048 // to have a dependency of Type.h on Stmt.h/Expr.h. 1049 return (Expr*) SizeExpr; 1050 } 1051 SourceRange getBracketsRange() const { return Brackets; } 1052 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1053 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1054 1055 virtual void getAsStringInternal(std::string &InnerString, 1056 const PrintingPolicy &Policy) const; 1057 1058 static bool classof(const Type *T) { 1059 return T->getTypeClass() == VariableArray; 1060 } 1061 static bool classof(const VariableArrayType *) { return true; } 1062 1063 friend class StmtIteratorBase; 1064 1065 void Profile(llvm::FoldingSetNodeID &ID) { 1066 assert(0 && "Cannnot unique VariableArrayTypes."); 1067 } 1068}; 1069 1070/// DependentSizedArrayType - This type represents an array type in 1071/// C++ whose size is a value-dependent expression. For example: 1072/// @code 1073/// template<typename T, int Size> 1074/// class array { 1075/// T data[Size]; 1076/// }; 1077/// @endcode 1078/// For these types, we won't actually know what the array bound is 1079/// until template instantiation occurs, at which point this will 1080/// become either a ConstantArrayType or a VariableArrayType. 1081class DependentSizedArrayType : public ArrayType { 1082 /// SizeExpr - An assignment expression that will instantiate to the 1083 /// size of the array. 1084 Stmt *SizeExpr; 1085 /// Brackets - The left and right array brackets. 1086 SourceRange Brackets; 1087 1088 DependentSizedArrayType(QualType et, QualType can, Expr *e, 1089 ArraySizeModifier sm, unsigned tq, 1090 SourceRange brackets) 1091 : ArrayType(DependentSizedArray, et, can, sm, tq), 1092 SizeExpr((Stmt*) e), Brackets(brackets) {} 1093 friend class ASTContext; // ASTContext creates these. 1094 virtual void Destroy(ASTContext& C); 1095 1096public: 1097 Expr *getSizeExpr() const { 1098 // We use C-style casts instead of cast<> here because we do not wish 1099 // to have a dependency of Type.h on Stmt.h/Expr.h. 1100 return (Expr*) SizeExpr; 1101 } 1102 SourceRange getBracketsRange() const { return Brackets; } 1103 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1104 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1105 1106 virtual void getAsStringInternal(std::string &InnerString, 1107 const PrintingPolicy &Policy) const; 1108 1109 static bool classof(const Type *T) { 1110 return T->getTypeClass() == DependentSizedArray; 1111 } 1112 static bool classof(const DependentSizedArrayType *) { return true; } 1113 1114 friend class StmtIteratorBase; 1115 1116 void Profile(llvm::FoldingSetNodeID &ID) { 1117 assert(0 && "Cannnot unique DependentSizedArrayTypes."); 1118 } 1119}; 1120 1121/// DependentSizedExtVectorType - This type represent an extended vector type 1122/// where either the type or size is dependent. For example: 1123/// @code 1124/// template<typename T, int Size> 1125/// class vector { 1126/// typedef T __attribute__((ext_vector_type(Size))) type; 1127/// } 1128/// @endcode 1129class DependentSizedExtVectorType : public Type { 1130 Expr *SizeExpr; 1131 /// ElementType - The element type of the array. 1132 QualType ElementType; 1133 SourceLocation loc; 1134 1135 DependentSizedExtVectorType(QualType ElementType, QualType can, 1136 Expr *SizeExpr, SourceLocation loc) 1137 : Type (DependentSizedExtVector, can, true), 1138 SizeExpr(SizeExpr), ElementType(ElementType), loc(loc) {} 1139 friend class ASTContext; 1140 virtual void Destroy(ASTContext& C); 1141 1142public: 1143 const Expr *getSizeExpr() const { return SizeExpr; } 1144 QualType getElementType() const { return ElementType; } 1145 SourceLocation getAttributeLoc() const { return loc; } 1146 1147 virtual void getAsStringInternal(std::string &InnerString, 1148 const PrintingPolicy &Policy) const; 1149 1150 static bool classof(const Type *T) { 1151 return T->getTypeClass() == DependentSizedExtVector; 1152 } 1153 static bool classof(const DependentSizedExtVectorType *) { return true; } 1154}; 1155 1156 1157/// VectorType - GCC generic vector type. This type is created using 1158/// __attribute__((vector_size(n)), where "n" specifies the vector size in 1159/// bytes. Since the constructor takes the number of vector elements, the 1160/// client is responsible for converting the size into the number of elements. 1161class VectorType : public Type, public llvm::FoldingSetNode { 1162protected: 1163 /// ElementType - The element type of the vector. 1164 QualType ElementType; 1165 1166 /// NumElements - The number of elements in the vector. 1167 unsigned NumElements; 1168 1169 VectorType(QualType vecType, unsigned nElements, QualType canonType) : 1170 Type(Vector, canonType, vecType->isDependentType()), 1171 ElementType(vecType), NumElements(nElements) {} 1172 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 1173 QualType canonType) 1174 : Type(tc, canonType, vecType->isDependentType()), ElementType(vecType), 1175 NumElements(nElements) {} 1176 friend class ASTContext; // ASTContext creates these. 1177public: 1178 1179 QualType getElementType() const { return ElementType; } 1180 unsigned getNumElements() const { return NumElements; } 1181 1182 virtual void getAsStringInternal(std::string &InnerString, 1183 const PrintingPolicy &Policy) const; 1184 1185 void Profile(llvm::FoldingSetNodeID &ID) { 1186 Profile(ID, getElementType(), getNumElements(), getTypeClass()); 1187 } 1188 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 1189 unsigned NumElements, TypeClass TypeClass) { 1190 ID.AddPointer(ElementType.getAsOpaquePtr()); 1191 ID.AddInteger(NumElements); 1192 ID.AddInteger(TypeClass); 1193 } 1194 static bool classof(const Type *T) { 1195 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 1196 } 1197 static bool classof(const VectorType *) { return true; } 1198}; 1199 1200/// ExtVectorType - Extended vector type. This type is created using 1201/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 1202/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 1203/// class enables syntactic extensions, like Vector Components for accessing 1204/// points, colors, and textures (modeled after OpenGL Shading Language). 1205class ExtVectorType : public VectorType { 1206 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 1207 VectorType(ExtVector, vecType, nElements, canonType) {} 1208 friend class ASTContext; // ASTContext creates these. 1209public: 1210 static int getPointAccessorIdx(char c) { 1211 switch (c) { 1212 default: return -1; 1213 case 'x': return 0; 1214 case 'y': return 1; 1215 case 'z': return 2; 1216 case 'w': return 3; 1217 } 1218 } 1219 static int getNumericAccessorIdx(char c) { 1220 switch (c) { 1221 default: return -1; 1222 case '0': return 0; 1223 case '1': return 1; 1224 case '2': return 2; 1225 case '3': return 3; 1226 case '4': return 4; 1227 case '5': return 5; 1228 case '6': return 6; 1229 case '7': return 7; 1230 case '8': return 8; 1231 case '9': return 9; 1232 case 'A': 1233 case 'a': return 10; 1234 case 'B': 1235 case 'b': return 11; 1236 case 'C': 1237 case 'c': return 12; 1238 case 'D': 1239 case 'd': return 13; 1240 case 'E': 1241 case 'e': return 14; 1242 case 'F': 1243 case 'f': return 15; 1244 } 1245 } 1246 1247 static int getAccessorIdx(char c) { 1248 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 1249 return getNumericAccessorIdx(c); 1250 } 1251 1252 bool isAccessorWithinNumElements(char c) const { 1253 if (int idx = getAccessorIdx(c)+1) 1254 return unsigned(idx-1) < NumElements; 1255 return false; 1256 } 1257 virtual void getAsStringInternal(std::string &InnerString, 1258 const PrintingPolicy &Policy) const; 1259 1260 static bool classof(const Type *T) { 1261 return T->getTypeClass() == ExtVector; 1262 } 1263 static bool classof(const ExtVectorType *) { return true; } 1264}; 1265 1266/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 1267/// class of FunctionNoProtoType and FunctionProtoType. 1268/// 1269class FunctionType : public Type { 1270 /// SubClassData - This field is owned by the subclass, put here to pack 1271 /// tightly with the ivars in Type. 1272 bool SubClassData : 1; 1273 1274 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1275 /// other bitfields. 1276 /// The qualifiers are part of FunctionProtoType because... 1277 /// 1278 /// C++ 8.3.5p4: The return type, the parameter type list and the 1279 /// cv-qualifier-seq, [...], are part of the function type. 1280 /// 1281 unsigned TypeQuals : 3; 1282 1283 // The type returned by the function. 1284 QualType ResultType; 1285protected: 1286 FunctionType(TypeClass tc, QualType res, bool SubclassInfo, 1287 unsigned typeQuals, QualType Canonical, bool Dependent) 1288 : Type(tc, Canonical, Dependent), 1289 SubClassData(SubclassInfo), TypeQuals(typeQuals), ResultType(res) {} 1290 bool getSubClassData() const { return SubClassData; } 1291 unsigned getTypeQuals() const { return TypeQuals; } 1292public: 1293 1294 QualType getResultType() const { return ResultType; } 1295 1296 1297 static bool classof(const Type *T) { 1298 return T->getTypeClass() == FunctionNoProto || 1299 T->getTypeClass() == FunctionProto; 1300 } 1301 static bool classof(const FunctionType *) { return true; } 1302}; 1303 1304/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 1305/// no information available about its arguments. 1306class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 1307 FunctionNoProtoType(QualType Result, QualType Canonical) 1308 : FunctionType(FunctionNoProto, Result, false, 0, Canonical, 1309 /*Dependent=*/false) {} 1310 friend class ASTContext; // ASTContext creates these. 1311public: 1312 // No additional state past what FunctionType provides. 1313 1314 virtual void getAsStringInternal(std::string &InnerString, 1315 const PrintingPolicy &Policy) const; 1316 1317 void Profile(llvm::FoldingSetNodeID &ID) { 1318 Profile(ID, getResultType()); 1319 } 1320 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType) { 1321 ID.AddPointer(ResultType.getAsOpaquePtr()); 1322 } 1323 1324 static bool classof(const Type *T) { 1325 return T->getTypeClass() == FunctionNoProto; 1326 } 1327 static bool classof(const FunctionNoProtoType *) { return true; } 1328}; 1329 1330/// FunctionProtoType - Represents a prototype with argument type info, e.g. 1331/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 1332/// arguments, not as having a single void argument. Such a type can have an 1333/// exception specification, but this specification is not part of the canonical 1334/// type. 1335class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 1336 /// hasAnyDependentType - Determine whether there are any dependent 1337 /// types within the arguments passed in. 1338 static bool hasAnyDependentType(const QualType *ArgArray, unsigned numArgs) { 1339 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 1340 if (ArgArray[Idx]->isDependentType()) 1341 return true; 1342 1343 return false; 1344 } 1345 1346 FunctionProtoType(QualType Result, const QualType *ArgArray, unsigned numArgs, 1347 bool isVariadic, unsigned typeQuals, bool hasExs, 1348 bool hasAnyExs, const QualType *ExArray, 1349 unsigned numExs, QualType Canonical) 1350 : FunctionType(FunctionProto, Result, isVariadic, typeQuals, Canonical, 1351 (Result->isDependentType() || 1352 hasAnyDependentType(ArgArray, numArgs))), 1353 NumArgs(numArgs), NumExceptions(numExs), HasExceptionSpec(hasExs), 1354 AnyExceptionSpec(hasAnyExs) { 1355 // Fill in the trailing argument array. 1356 QualType *ArgInfo = reinterpret_cast<QualType*>(this+1); 1357 for (unsigned i = 0; i != numArgs; ++i) 1358 ArgInfo[i] = ArgArray[i]; 1359 // Fill in the exception array. 1360 QualType *Ex = ArgInfo + numArgs; 1361 for (unsigned i = 0; i != numExs; ++i) 1362 Ex[i] = ExArray[i]; 1363 } 1364 1365 /// NumArgs - The number of arguments this function has, not counting '...'. 1366 unsigned NumArgs : 20; 1367 1368 /// NumExceptions - The number of types in the exception spec, if any. 1369 unsigned NumExceptions : 10; 1370 1371 /// HasExceptionSpec - Whether this function has an exception spec at all. 1372 bool HasExceptionSpec : 1; 1373 1374 /// AnyExceptionSpec - Whether this function has a throw(...) spec. 1375 bool AnyExceptionSpec : 1; 1376 1377 /// ArgInfo - There is an variable size array after the class in memory that 1378 /// holds the argument types. 1379 1380 /// Exceptions - There is another variable size array after ArgInfo that 1381 /// holds the exception types. 1382 1383 friend class ASTContext; // ASTContext creates these. 1384 1385public: 1386 unsigned getNumArgs() const { return NumArgs; } 1387 QualType getArgType(unsigned i) const { 1388 assert(i < NumArgs && "Invalid argument number!"); 1389 return arg_type_begin()[i]; 1390 } 1391 1392 bool hasExceptionSpec() const { return HasExceptionSpec; } 1393 bool hasAnyExceptionSpec() const { return AnyExceptionSpec; } 1394 unsigned getNumExceptions() const { return NumExceptions; } 1395 QualType getExceptionType(unsigned i) const { 1396 assert(i < NumExceptions && "Invalid exception number!"); 1397 return exception_begin()[i]; 1398 } 1399 bool hasEmptyExceptionSpec() const { 1400 return hasExceptionSpec() && !hasAnyExceptionSpec() && 1401 getNumExceptions() == 0; 1402 } 1403 1404 bool isVariadic() const { return getSubClassData(); } 1405 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 1406 1407 typedef const QualType *arg_type_iterator; 1408 arg_type_iterator arg_type_begin() const { 1409 return reinterpret_cast<const QualType *>(this+1); 1410 } 1411 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 1412 1413 typedef const QualType *exception_iterator; 1414 exception_iterator exception_begin() const { 1415 // exceptions begin where arguments end 1416 return arg_type_end(); 1417 } 1418 exception_iterator exception_end() const { 1419 return exception_begin() + NumExceptions; 1420 } 1421 1422 virtual void getAsStringInternal(std::string &InnerString, 1423 const PrintingPolicy &Policy) const; 1424 1425 static bool classof(const Type *T) { 1426 return T->getTypeClass() == FunctionProto; 1427 } 1428 static bool classof(const FunctionProtoType *) { return true; } 1429 1430 void Profile(llvm::FoldingSetNodeID &ID); 1431 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 1432 arg_type_iterator ArgTys, unsigned NumArgs, 1433 bool isVariadic, unsigned TypeQuals, 1434 bool hasExceptionSpec, bool anyExceptionSpec, 1435 unsigned NumExceptions, exception_iterator Exs); 1436}; 1437 1438 1439class TypedefType : public Type { 1440 TypedefDecl *Decl; 1441protected: 1442 TypedefType(TypeClass tc, TypedefDecl *D, QualType can) 1443 : Type(tc, can, can->isDependentType()), Decl(D) { 1444 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1445 } 1446 friend class ASTContext; // ASTContext creates these. 1447public: 1448 1449 TypedefDecl *getDecl() const { return Decl; } 1450 1451 /// LookThroughTypedefs - Return the ultimate type this typedef corresponds to 1452 /// potentially looking through *all* consecutive typedefs. This returns the 1453 /// sum of the type qualifiers, so if you have: 1454 /// typedef const int A; 1455 /// typedef volatile A B; 1456 /// looking through the typedefs for B will give you "const volatile A". 1457 QualType LookThroughTypedefs() const; 1458 1459 virtual void getAsStringInternal(std::string &InnerString, 1460 const PrintingPolicy &Policy) const; 1461 1462 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 1463 static bool classof(const TypedefType *) { return true; } 1464}; 1465 1466/// TypeOfExprType (GCC extension). 1467class TypeOfExprType : public Type { 1468 Expr *TOExpr; 1469 TypeOfExprType(Expr *E, QualType can = QualType()); 1470 friend class ASTContext; // ASTContext creates these. 1471public: 1472 Expr *getUnderlyingExpr() const { return TOExpr; } 1473 1474 virtual void getAsStringInternal(std::string &InnerString, 1475 const PrintingPolicy &Policy) const; 1476 1477 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 1478 static bool classof(const TypeOfExprType *) { return true; } 1479}; 1480 1481/// TypeOfType (GCC extension). 1482class TypeOfType : public Type { 1483 QualType TOType; 1484 TypeOfType(QualType T, QualType can) 1485 : Type(TypeOf, can, T->isDependentType()), TOType(T) { 1486 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1487 } 1488 friend class ASTContext; // ASTContext creates these. 1489public: 1490 QualType getUnderlyingType() const { return TOType; } 1491 1492 virtual void getAsStringInternal(std::string &InnerString, 1493 const PrintingPolicy &Policy) const; 1494 1495 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 1496 static bool classof(const TypeOfType *) { return true; } 1497}; 1498 1499/// DecltypeType (C++0x) 1500class DecltypeType : public Type { 1501 Expr *E; 1502 1503 // FIXME: We could get rid of UnderlyingType if we wanted to: We would have to 1504 // Move getDesugaredType to ASTContext so that it can call getDecltypeForExpr 1505 // from it. 1506 QualType UnderlyingType; 1507 1508 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 1509 friend class ASTContext; // ASTContext creates these. 1510public: 1511 Expr *getUnderlyingExpr() const { return E; } 1512 QualType getUnderlyingType() const { return UnderlyingType; } 1513 1514 virtual void getAsStringInternal(std::string &InnerString, 1515 const PrintingPolicy &Policy) const; 1516 1517 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 1518 static bool classof(const DecltypeType *) { return true; } 1519}; 1520 1521class TagType : public Type { 1522 /// Stores the TagDecl associated with this type. The decl will 1523 /// point to the TagDecl that actually defines the entity (or is a 1524 /// definition in progress), if there is such a definition. The 1525 /// single-bit value will be non-zero when this tag is in the 1526 /// process of being defined. 1527 mutable llvm::PointerIntPair<TagDecl *, 1> decl; 1528 friend class ASTContext; 1529 friend class TagDecl; 1530 1531protected: 1532 TagType(TypeClass TC, TagDecl *D, QualType can); 1533 1534public: 1535 TagDecl *getDecl() const { return decl.getPointer(); } 1536 1537 /// @brief Determines whether this type is in the process of being 1538 /// defined. 1539 bool isBeingDefined() const { return decl.getInt(); } 1540 void setBeingDefined(bool Def) { decl.setInt(Def? 1 : 0); } 1541 1542 virtual void getAsStringInternal(std::string &InnerString, 1543 const PrintingPolicy &Policy) const; 1544 1545 static bool classof(const Type *T) { 1546 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 1547 } 1548 static bool classof(const TagType *) { return true; } 1549 static bool classof(const RecordType *) { return true; } 1550 static bool classof(const EnumType *) { return true; } 1551}; 1552 1553/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 1554/// to detect TagType objects of structs/unions/classes. 1555class RecordType : public TagType { 1556protected: 1557 explicit RecordType(RecordDecl *D) 1558 : TagType(Record, reinterpret_cast<TagDecl*>(D), QualType()) { } 1559 explicit RecordType(TypeClass TC, RecordDecl *D) 1560 : TagType(TC, reinterpret_cast<TagDecl*>(D), QualType()) { } 1561 friend class ASTContext; // ASTContext creates these. 1562public: 1563 1564 RecordDecl *getDecl() const { 1565 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 1566 } 1567 1568 // FIXME: This predicate is a helper to QualType/Type. It needs to 1569 // recursively check all fields for const-ness. If any field is declared 1570 // const, it needs to return false. 1571 bool hasConstFields() const { return false; } 1572 1573 // FIXME: RecordType needs to check when it is created that all fields are in 1574 // the same address space, and return that. 1575 unsigned getAddressSpace() const { return 0; } 1576 1577 static bool classof(const TagType *T); 1578 static bool classof(const Type *T) { 1579 return isa<TagType>(T) && classof(cast<TagType>(T)); 1580 } 1581 static bool classof(const RecordType *) { return true; } 1582}; 1583 1584/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 1585/// to detect TagType objects of enums. 1586class EnumType : public TagType { 1587 explicit EnumType(EnumDecl *D) 1588 : TagType(Enum, reinterpret_cast<TagDecl*>(D), QualType()) { } 1589 friend class ASTContext; // ASTContext creates these. 1590public: 1591 1592 EnumDecl *getDecl() const { 1593 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 1594 } 1595 1596 static bool classof(const TagType *T); 1597 static bool classof(const Type *T) { 1598 return isa<TagType>(T) && classof(cast<TagType>(T)); 1599 } 1600 static bool classof(const EnumType *) { return true; } 1601}; 1602 1603class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 1604 unsigned Depth : 15; 1605 unsigned Index : 16; 1606 unsigned ParameterPack : 1; 1607 IdentifierInfo *Name; 1608 1609 TemplateTypeParmType(unsigned D, unsigned I, bool PP, IdentifierInfo *N, 1610 QualType Canon) 1611 : Type(TemplateTypeParm, Canon, /*Dependent=*/true), 1612 Depth(D), Index(I), ParameterPack(PP), Name(N) { } 1613 1614 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 1615 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true), 1616 Depth(D), Index(I), ParameterPack(PP), Name(0) { } 1617 1618 friend class ASTContext; // ASTContext creates these 1619 1620public: 1621 unsigned getDepth() const { return Depth; } 1622 unsigned getIndex() const { return Index; } 1623 bool isParameterPack() const { return ParameterPack; } 1624 IdentifierInfo *getName() const { return Name; } 1625 1626 virtual void getAsStringInternal(std::string &InnerString, 1627 const PrintingPolicy &Policy) const; 1628 1629 void Profile(llvm::FoldingSetNodeID &ID) { 1630 Profile(ID, Depth, Index, ParameterPack, Name); 1631 } 1632 1633 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 1634 unsigned Index, bool ParameterPack, 1635 IdentifierInfo *Name) { 1636 ID.AddInteger(Depth); 1637 ID.AddInteger(Index); 1638 ID.AddBoolean(ParameterPack); 1639 ID.AddPointer(Name); 1640 } 1641 1642 static bool classof(const Type *T) { 1643 return T->getTypeClass() == TemplateTypeParm; 1644 } 1645 static bool classof(const TemplateTypeParmType *T) { return true; } 1646}; 1647 1648/// \brief Represents the type of a template specialization as written 1649/// in the source code. 1650/// 1651/// Template specialization types represent the syntactic form of a 1652/// template-id that refers to a type, e.g., @c vector<int>. Some 1653/// template specialization types are syntactic sugar, whose canonical 1654/// type will point to some other type node that represents the 1655/// instantiation or class template specialization. For example, a 1656/// class template specialization type of @c vector<int> will refer to 1657/// a tag type for the instantiation 1658/// @c std::vector<int, std::allocator<int>>. 1659/// 1660/// Other template specialization types, for which the template name 1661/// is dependent, may be canonical types. These types are always 1662/// dependent. 1663class TemplateSpecializationType 1664 : public Type, public llvm::FoldingSetNode { 1665 1666 /// \brief The name of the template being specialized. 1667 TemplateName Template; 1668 1669 /// \brief - The number of template arguments named in this class 1670 /// template specialization. 1671 unsigned NumArgs; 1672 1673 TemplateSpecializationType(TemplateName T, 1674 const TemplateArgument *Args, 1675 unsigned NumArgs, QualType Canon); 1676 1677 virtual void Destroy(ASTContext& C); 1678 1679 friend class ASTContext; // ASTContext creates these 1680 1681public: 1682 /// \brief Determine whether any of the given template arguments are 1683 /// dependent. 1684 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 1685 unsigned NumArgs); 1686 1687 /// \brief Print a template argument list, including the '<' and '>' 1688 /// enclosing the template arguments. 1689 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 1690 unsigned NumArgs, 1691 const PrintingPolicy &Policy); 1692 1693 typedef const TemplateArgument * iterator; 1694 1695 iterator begin() const { return getArgs(); } 1696 iterator end() const; 1697 1698 /// \brief Retrieve the name of the template that we are specializing. 1699 TemplateName getTemplateName() const { return Template; } 1700 1701 /// \brief Retrieve the template arguments. 1702 const TemplateArgument *getArgs() const { 1703 return reinterpret_cast<const TemplateArgument *>(this + 1); 1704 } 1705 1706 /// \brief Retrieve the number of template arguments. 1707 unsigned getNumArgs() const { return NumArgs; } 1708 1709 /// \brief Retrieve a specific template argument as a type. 1710 /// \precondition @c isArgType(Arg) 1711 const TemplateArgument &getArg(unsigned Idx) const; 1712 1713 virtual void getAsStringInternal(std::string &InnerString, 1714 const PrintingPolicy &Policy) const; 1715 1716 void Profile(llvm::FoldingSetNodeID &ID) { 1717 Profile(ID, Template, getArgs(), NumArgs); 1718 } 1719 1720 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 1721 const TemplateArgument *Args, unsigned NumArgs); 1722 1723 static bool classof(const Type *T) { 1724 return T->getTypeClass() == TemplateSpecialization; 1725 } 1726 static bool classof(const TemplateSpecializationType *T) { return true; } 1727}; 1728 1729/// \brief Represents a type that was referred to via a qualified 1730/// name, e.g., N::M::type. 1731/// 1732/// This type is used to keep track of a type name as written in the 1733/// source code, including any nested-name-specifiers. The type itself 1734/// is always "sugar", used to express what was written in the source 1735/// code but containing no additional semantic information. 1736class QualifiedNameType : public Type, public llvm::FoldingSetNode { 1737 /// \brief The nested name specifier containing the qualifier. 1738 NestedNameSpecifier *NNS; 1739 1740 /// \brief The type that this qualified name refers to. 1741 QualType NamedType; 1742 1743 QualifiedNameType(NestedNameSpecifier *NNS, QualType NamedType, 1744 QualType CanonType) 1745 : Type(QualifiedName, CanonType, NamedType->isDependentType()), 1746 NNS(NNS), NamedType(NamedType) { } 1747 1748 friend class ASTContext; // ASTContext creates these 1749 1750public: 1751 /// \brief Retrieve the qualification on this type. 1752 NestedNameSpecifier *getQualifier() const { return NNS; } 1753 1754 /// \brief Retrieve the type named by the qualified-id. 1755 QualType getNamedType() const { return NamedType; } 1756 1757 virtual void getAsStringInternal(std::string &InnerString, 1758 const PrintingPolicy &Policy) const; 1759 1760 void Profile(llvm::FoldingSetNodeID &ID) { 1761 Profile(ID, NNS, NamedType); 1762 } 1763 1764 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 1765 QualType NamedType) { 1766 ID.AddPointer(NNS); 1767 NamedType.Profile(ID); 1768 } 1769 1770 static bool classof(const Type *T) { 1771 return T->getTypeClass() == QualifiedName; 1772 } 1773 static bool classof(const QualifiedNameType *T) { return true; } 1774}; 1775 1776/// \brief Represents a 'typename' specifier that names a type within 1777/// a dependent type, e.g., "typename T::type". 1778/// 1779/// TypenameType has a very similar structure to QualifiedNameType, 1780/// which also involves a nested-name-specifier following by a type, 1781/// and (FIXME!) both can even be prefixed by the 'typename' 1782/// keyword. However, the two types serve very different roles: 1783/// QualifiedNameType is a non-semantic type that serves only as sugar 1784/// to show how a particular type was written in the source 1785/// code. TypenameType, on the other hand, only occurs when the 1786/// nested-name-specifier is dependent, such that we cannot resolve 1787/// the actual type until after instantiation. 1788class TypenameType : public Type, public llvm::FoldingSetNode { 1789 /// \brief The nested name specifier containing the qualifier. 1790 NestedNameSpecifier *NNS; 1791 1792 typedef llvm::PointerUnion<const IdentifierInfo *, 1793 const TemplateSpecializationType *> NameType; 1794 1795 /// \brief The type that this typename specifier refers to. 1796 NameType Name; 1797 1798 TypenameType(NestedNameSpecifier *NNS, const IdentifierInfo *Name, 1799 QualType CanonType) 1800 : Type(Typename, CanonType, true), NNS(NNS), Name(Name) { 1801 assert(NNS->isDependent() && 1802 "TypenameType requires a dependent nested-name-specifier"); 1803 } 1804 1805 TypenameType(NestedNameSpecifier *NNS, const TemplateSpecializationType *Ty, 1806 QualType CanonType) 1807 : Type(Typename, CanonType, true), NNS(NNS), Name(Ty) { 1808 assert(NNS->isDependent() && 1809 "TypenameType requires a dependent nested-name-specifier"); 1810 } 1811 1812 friend class ASTContext; // ASTContext creates these 1813 1814public: 1815 /// \brief Retrieve the qualification on this type. 1816 NestedNameSpecifier *getQualifier() const { return NNS; } 1817 1818 /// \brief Retrieve the type named by the typename specifier as an 1819 /// identifier. 1820 /// 1821 /// This routine will return a non-NULL identifier pointer when the 1822 /// form of the original typename was terminated by an identifier, 1823 /// e.g., "typename T::type". 1824 const IdentifierInfo *getIdentifier() const { 1825 return Name.dyn_cast<const IdentifierInfo *>(); 1826 } 1827 1828 /// \brief Retrieve the type named by the typename specifier as a 1829 /// type specialization. 1830 const TemplateSpecializationType *getTemplateId() const { 1831 return Name.dyn_cast<const TemplateSpecializationType *>(); 1832 } 1833 1834 virtual void getAsStringInternal(std::string &InnerString, 1835 const PrintingPolicy &Policy) const; 1836 1837 void Profile(llvm::FoldingSetNodeID &ID) { 1838 Profile(ID, NNS, Name); 1839 } 1840 1841 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 1842 NameType Name) { 1843 ID.AddPointer(NNS); 1844 ID.AddPointer(Name.getOpaqueValue()); 1845 } 1846 1847 static bool classof(const Type *T) { 1848 return T->getTypeClass() == Typename; 1849 } 1850 static bool classof(const TypenameType *T) { return true; } 1851}; 1852 1853/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 1854/// object oriented design. They basically correspond to C++ classes. There 1855/// are two kinds of interface types, normal interfaces like "NSString" and 1856/// qualified interfaces, which are qualified with a protocol list like 1857/// "NSString<NSCopyable, NSAmazing>". Qualified interface types are instances 1858/// of ObjCQualifiedInterfaceType, which is a subclass of ObjCInterfaceType. 1859class ObjCInterfaceType : public Type { 1860 ObjCInterfaceDecl *Decl; 1861protected: 1862 ObjCInterfaceType(TypeClass tc, ObjCInterfaceDecl *D) : 1863 Type(tc, QualType(), /*Dependent=*/false), Decl(D) { } 1864 friend class ASTContext; // ASTContext creates these. 1865 1866 // FIXME: These can go away when we move ASTContext::canAssignObjCInterfaces 1867 // to this class (as a static helper). 1868 bool isObjCIdInterface() const; 1869 bool isObjCClassInterface() const; 1870public: 1871 1872 ObjCInterfaceDecl *getDecl() const { return Decl; } 1873 1874 /// qual_iterator and friends: this provides access to the (potentially empty) 1875 /// list of protocols qualifying this interface. If this is an instance of 1876 /// ObjCQualifiedInterfaceType it returns the list, otherwise it returns an 1877 /// empty list if there are no qualifying protocols. 1878 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 1879 inline qual_iterator qual_begin() const; 1880 inline qual_iterator qual_end() const; 1881 bool qual_empty() const { return getTypeClass() != ObjCQualifiedInterface; } 1882 1883 /// getNumProtocols - Return the number of qualifying protocols in this 1884 /// interface type, or 0 if there are none. 1885 inline unsigned getNumProtocols() const; 1886 1887 virtual void getAsStringInternal(std::string &InnerString, 1888 const PrintingPolicy &Policy) const; 1889 static bool classof(const Type *T) { 1890 return T->getTypeClass() == ObjCInterface || 1891 T->getTypeClass() == ObjCQualifiedInterface; 1892 } 1893 static bool classof(const ObjCInterfaceType *) { return true; } 1894}; 1895 1896/// ObjCObjectPointerType - Used to represent 'id', 'Interface *', 'id <p>', 1897/// and 'Interface <p> *'. 1898/// 1899/// Duplicate protocols are removed and protocol list is canonicalized to be in 1900/// alphabetical order. 1901class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 1902 QualType PointeeType; // will always point to an interface type. 1903 1904 // List of protocols for this protocol conforming object type 1905 // List is sorted on protocol name. No protocol is entered more than once. 1906 llvm::SmallVector<ObjCProtocolDecl*, 8> Protocols; 1907 1908 ObjCObjectPointerType(QualType T, ObjCProtocolDecl **Protos, unsigned NumP) : 1909 Type(ObjCObjectPointer, QualType(), /*Dependent=*/false), 1910 PointeeType(T), Protocols(Protos, Protos+NumP) { } 1911 friend class ASTContext; // ASTContext creates these. 1912 friend class ObjCInterfaceType; // To enable 'id' and 'Class' predicates. 1913 1914 static ObjCInterfaceType *IdInterfaceT; 1915 static ObjCInterfaceType *ClassInterfaceT; 1916 static void setIdInterface(QualType T) { 1917 IdInterfaceT = dyn_cast<ObjCInterfaceType>(T.getTypePtr()); 1918 } 1919 static void setClassInterface(QualType T) { 1920 ClassInterfaceT = dyn_cast<ObjCInterfaceType>(T.getTypePtr()); 1921 } 1922 static ObjCInterfaceType *getIdInterface() { return IdInterfaceT; } 1923 static ObjCInterfaceType *getClassInterface() { return ClassInterfaceT; } 1924public: 1925 // Get the pointee type. Pointee is required to always be an interface type. 1926 // Note: Pointee can be a TypedefType whose canonical type is an interface. 1927 // Example: typedef NSObject T; T *var; 1928 QualType getPointeeType() const { return PointeeType; } 1929 1930 const ObjCInterfaceType *getInterfaceType() const { 1931 return PointeeType->getAsObjCInterfaceType(); 1932 } 1933 ObjCInterfaceDecl *getInterfaceDecl() const { 1934 return getInterfaceType()->getDecl(); 1935 } 1936 /// isObjCQualifiedIdType - true for "id <p>". 1937 bool isObjCQualifiedIdType() const { 1938 return getInterfaceType() == IdInterfaceT && Protocols.size(); 1939 } 1940 bool isObjCIdType() const { 1941 return getInterfaceType() == IdInterfaceT && !Protocols.size(); 1942 } 1943 bool isObjCClassType() const { 1944 return getInterfaceType() == ClassInterfaceT && !Protocols.size(); 1945 } 1946 /// qual_iterator and friends: this provides access to the (potentially empty) 1947 /// list of protocols qualifying this interface. 1948 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 1949 1950 qual_iterator qual_begin() const { return Protocols.begin(); } 1951 qual_iterator qual_end() const { return Protocols.end(); } 1952 bool qual_empty() const { return Protocols.size() == 0; } 1953 1954 /// getNumProtocols - Return the number of qualifying protocols in this 1955 /// interface type, or 0 if there are none. 1956 unsigned getNumProtocols() const { return Protocols.size(); } 1957 1958 void Profile(llvm::FoldingSetNodeID &ID); 1959 static void Profile(llvm::FoldingSetNodeID &ID, QualType T, 1960 ObjCProtocolDecl **protocols, unsigned NumProtocols); 1961 virtual void getAsStringInternal(std::string &InnerString, 1962 const PrintingPolicy &Policy) const; 1963 static bool classof(const Type *T) { 1964 return T->getTypeClass() == ObjCObjectPointer; 1965 } 1966 static bool classof(const ObjCObjectPointerType *) { return true; } 1967}; 1968 1969/// ObjCQualifiedInterfaceType - This class represents interface types 1970/// conforming to a list of protocols, such as INTF<Proto1, Proto2, Proto1>. 1971/// 1972/// Duplicate protocols are removed and protocol list is canonicalized to be in 1973/// alphabetical order. 1974/// FIXME: Remove this class (converting uses to ObjCObjectPointerType). 1975class ObjCQualifiedInterfaceType : public ObjCInterfaceType, 1976 public llvm::FoldingSetNode { 1977 1978 // List of protocols for this protocol conforming object type 1979 // List is sorted on protocol name. No protocol is enterred more than once. 1980 llvm::SmallVector<ObjCProtocolDecl*, 4> Protocols; 1981 1982 ObjCQualifiedInterfaceType(ObjCInterfaceDecl *D, 1983 ObjCProtocolDecl **Protos, unsigned NumP) : 1984 ObjCInterfaceType(ObjCQualifiedInterface, D), 1985 Protocols(Protos, Protos+NumP) { } 1986 friend class ASTContext; // ASTContext creates these. 1987public: 1988 1989 unsigned getNumProtocols() const { 1990 return Protocols.size(); 1991 } 1992 1993 qual_iterator qual_begin() const { return Protocols.begin(); } 1994 qual_iterator qual_end() const { return Protocols.end(); } 1995 1996 virtual void getAsStringInternal(std::string &InnerString, 1997 const PrintingPolicy &Policy) const; 1998 1999 void Profile(llvm::FoldingSetNodeID &ID); 2000 static void Profile(llvm::FoldingSetNodeID &ID, 2001 const ObjCInterfaceDecl *Decl, 2002 ObjCProtocolDecl **protocols, unsigned NumProtocols); 2003 2004 static bool classof(const Type *T) { 2005 return T->getTypeClass() == ObjCQualifiedInterface; 2006 } 2007 static bool classof(const ObjCQualifiedInterfaceType *) { return true; } 2008}; 2009 2010inline ObjCInterfaceType::qual_iterator ObjCInterfaceType::qual_begin() const { 2011 if (const ObjCQualifiedInterfaceType *QIT = 2012 dyn_cast<ObjCQualifiedInterfaceType>(this)) 2013 return QIT->qual_begin(); 2014 return 0; 2015} 2016inline ObjCInterfaceType::qual_iterator ObjCInterfaceType::qual_end() const { 2017 if (const ObjCQualifiedInterfaceType *QIT = 2018 dyn_cast<ObjCQualifiedInterfaceType>(this)) 2019 return QIT->qual_end(); 2020 return 0; 2021} 2022 2023/// getNumProtocols - Return the number of qualifying protocols in this 2024/// interface type, or 0 if there are none. 2025inline unsigned ObjCInterfaceType::getNumProtocols() const { 2026 if (const ObjCQualifiedInterfaceType *QIT = 2027 dyn_cast<ObjCQualifiedInterfaceType>(this)) 2028 return QIT->getNumProtocols(); 2029 return 0; 2030} 2031 2032// Inline function definitions. 2033 2034/// getUnqualifiedType - Return the type without any qualifiers. 2035inline QualType QualType::getUnqualifiedType() const { 2036 Type *TP = getTypePtr(); 2037 if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(TP)) 2038 TP = EXTQT->getBaseType(); 2039 return QualType(TP, 0); 2040} 2041 2042/// getAddressSpace - Return the address space of this type. 2043inline unsigned QualType::getAddressSpace() const { 2044 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2045 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 2046 return AT->getElementType().getAddressSpace(); 2047 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 2048 return RT->getAddressSpace(); 2049 if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(CT)) 2050 return EXTQT->getAddressSpace(); 2051 return 0; 2052} 2053 2054/// getObjCGCAttr - Return the gc attribute of this type. 2055inline QualType::GCAttrTypes QualType::getObjCGCAttr() const { 2056 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2057 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 2058 return AT->getElementType().getObjCGCAttr(); 2059 if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(CT)) 2060 return EXTQT->getObjCGCAttr(); 2061 if (const ObjCObjectPointerType *PT = CT->getAsObjCObjectPointerType()) 2062 return PT->getPointeeType().getObjCGCAttr(); 2063 return GCNone; 2064} 2065 2066/// isMoreQualifiedThan - Determine whether this type is more 2067/// qualified than the Other type. For example, "const volatile int" 2068/// is more qualified than "const int", "volatile int", and 2069/// "int". However, it is not more qualified than "const volatile 2070/// int". 2071inline bool QualType::isMoreQualifiedThan(QualType Other) const { 2072 unsigned MyQuals = this->getCVRQualifiers(); 2073 unsigned OtherQuals = Other.getCVRQualifiers(); 2074 if (getAddressSpace() != Other.getAddressSpace()) 2075 return false; 2076 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 2077} 2078 2079/// isAtLeastAsQualifiedAs - Determine whether this type is at last 2080/// as qualified as the Other type. For example, "const volatile 2081/// int" is at least as qualified as "const int", "volatile int", 2082/// "int", and "const volatile int". 2083inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 2084 unsigned MyQuals = this->getCVRQualifiers(); 2085 unsigned OtherQuals = Other.getCVRQualifiers(); 2086 if (getAddressSpace() != Other.getAddressSpace()) 2087 return false; 2088 return (MyQuals | OtherQuals) == MyQuals; 2089} 2090 2091/// getNonReferenceType - If Type is a reference type (e.g., const 2092/// int&), returns the type that the reference refers to ("const 2093/// int"). Otherwise, returns the type itself. This routine is used 2094/// throughout Sema to implement C++ 5p6: 2095/// 2096/// If an expression initially has the type "reference to T" (8.3.2, 2097/// 8.5.3), the type is adjusted to "T" prior to any further 2098/// analysis, the expression designates the object or function 2099/// denoted by the reference, and the expression is an lvalue. 2100inline QualType QualType::getNonReferenceType() const { 2101 if (const ReferenceType *RefType = (*this)->getAsReferenceType()) 2102 return RefType->getPointeeType(); 2103 else 2104 return *this; 2105} 2106 2107inline const TypedefType* Type::getAsTypedefType() const { 2108 return dyn_cast<TypedefType>(this); 2109} 2110inline const ObjCInterfaceType *Type::getAsPointerToObjCInterfaceType() const { 2111 if (const PointerType *PT = getAsPointerType()) 2112 return PT->getPointeeType()->getAsObjCInterfaceType(); 2113 return 0; 2114} 2115 2116// NOTE: All of these methods use "getUnqualifiedType" to strip off address 2117// space qualifiers if present. 2118inline bool Type::isFunctionType() const { 2119 return isa<FunctionType>(CanonicalType.getUnqualifiedType()); 2120} 2121inline bool Type::isPointerType() const { 2122 return isa<PointerType>(CanonicalType.getUnqualifiedType()); 2123} 2124inline bool Type::isAnyPointerType() const { 2125 return isPointerType() || isObjCObjectPointerType(); 2126} 2127inline bool Type::isBlockPointerType() const { 2128 return isa<BlockPointerType>(CanonicalType.getUnqualifiedType()); 2129} 2130inline bool Type::isReferenceType() const { 2131 return isa<ReferenceType>(CanonicalType.getUnqualifiedType()); 2132} 2133inline bool Type::isLValueReferenceType() const { 2134 return isa<LValueReferenceType>(CanonicalType.getUnqualifiedType()); 2135} 2136inline bool Type::isRValueReferenceType() const { 2137 return isa<RValueReferenceType>(CanonicalType.getUnqualifiedType()); 2138} 2139inline bool Type::isFunctionPointerType() const { 2140 if (const PointerType* T = getAsPointerType()) 2141 return T->getPointeeType()->isFunctionType(); 2142 else 2143 return false; 2144} 2145inline bool Type::isMemberPointerType() const { 2146 return isa<MemberPointerType>(CanonicalType.getUnqualifiedType()); 2147} 2148inline bool Type::isMemberFunctionPointerType() const { 2149 if (const MemberPointerType* T = getAsMemberPointerType()) 2150 return T->getPointeeType()->isFunctionType(); 2151 else 2152 return false; 2153} 2154inline bool Type::isArrayType() const { 2155 return isa<ArrayType>(CanonicalType.getUnqualifiedType()); 2156} 2157inline bool Type::isConstantArrayType() const { 2158 return isa<ConstantArrayType>(CanonicalType.getUnqualifiedType()); 2159} 2160inline bool Type::isIncompleteArrayType() const { 2161 return isa<IncompleteArrayType>(CanonicalType.getUnqualifiedType()); 2162} 2163inline bool Type::isVariableArrayType() const { 2164 return isa<VariableArrayType>(CanonicalType.getUnqualifiedType()); 2165} 2166inline bool Type::isDependentSizedArrayType() const { 2167 return isa<DependentSizedArrayType>(CanonicalType.getUnqualifiedType()); 2168} 2169inline bool Type::isRecordType() const { 2170 return isa<RecordType>(CanonicalType.getUnqualifiedType()); 2171} 2172inline bool Type::isAnyComplexType() const { 2173 return isa<ComplexType>(CanonicalType.getUnqualifiedType()); 2174} 2175inline bool Type::isVectorType() const { 2176 return isa<VectorType>(CanonicalType.getUnqualifiedType()); 2177} 2178inline bool Type::isExtVectorType() const { 2179 return isa<ExtVectorType>(CanonicalType.getUnqualifiedType()); 2180} 2181inline bool Type::isObjCObjectPointerType() const { 2182 return isa<ObjCObjectPointerType>(CanonicalType.getUnqualifiedType()); 2183} 2184inline bool Type::isObjCInterfaceType() const { 2185 return isa<ObjCInterfaceType>(CanonicalType.getUnqualifiedType()); 2186} 2187inline bool Type::isObjCQualifiedInterfaceType() const { 2188 return isa<ObjCQualifiedInterfaceType>(CanonicalType.getUnqualifiedType()); 2189} 2190inline bool Type::isObjCQualifiedIdType() const { 2191 if (const ObjCObjectPointerType *OPT = getAsObjCObjectPointerType()) { 2192 return OPT->isObjCQualifiedIdType(); 2193 } 2194 return false; 2195} 2196inline bool Type::isObjCIdType() const { 2197 if (const ObjCObjectPointerType *OPT = getAsObjCObjectPointerType()) { 2198 return OPT->isObjCIdType(); 2199 } 2200 return false; 2201} 2202inline bool Type::isObjCClassType() const { 2203 if (const ObjCObjectPointerType *OPT = getAsObjCObjectPointerType()) { 2204 return OPT->isObjCClassType(); 2205 } 2206 return false; 2207} 2208inline bool Type::isTemplateTypeParmType() const { 2209 return isa<TemplateTypeParmType>(CanonicalType.getUnqualifiedType()); 2210} 2211 2212inline bool Type::isSpecificBuiltinType(unsigned K) const { 2213 if (const BuiltinType *BT = getAsBuiltinType()) 2214 if (BT->getKind() == (BuiltinType::Kind) K) 2215 return true; 2216 return false; 2217} 2218 2219/// \brief Determines whether this is a type for which one can define 2220/// an overloaded operator. 2221inline bool Type::isOverloadableType() const { 2222 return isDependentType() || isRecordType() || isEnumeralType(); 2223} 2224 2225inline bool Type::hasPointerRepresentation() const { 2226 return (isPointerType() || isReferenceType() || isBlockPointerType() || 2227 isObjCInterfaceType() || isObjCObjectPointerType() || 2228 isObjCQualifiedInterfaceType() || isNullPtrType()); 2229} 2230 2231inline bool Type::hasObjCPointerRepresentation() const { 2232 return (isObjCInterfaceType() || isObjCObjectPointerType() || 2233 isObjCQualifiedInterfaceType()); 2234} 2235 2236/// Insertion operator for diagnostics. This allows sending QualType's into a 2237/// diagnostic with <<. 2238inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 2239 QualType T) { 2240 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 2241 Diagnostic::ak_qualtype); 2242 return DB; 2243} 2244 2245} // end namespace clang 2246 2247#endif 2248