Type.h revision 2a2e0405001f22e9026cb0dec219146996d1e7b6
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 class 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, const PrintingPolicy &Policy) const; 192 193 void dump(const char *s) const; 194 void dump() const; 195 196 void Profile(llvm::FoldingSetNodeID &ID) const { 197 ID.AddPointer(getAsOpaquePtr()); 198 } 199 200public: 201 202 /// getAddressSpace - Return the address space of this type. 203 inline unsigned getAddressSpace() const; 204 205 /// GCAttrTypesAttr - Returns gc attribute of this type. 206 inline QualType::GCAttrTypes getObjCGCAttr() const; 207 208 /// isObjCGCWeak true when Type is objc's weak. 209 bool isObjCGCWeak() const { 210 return getObjCGCAttr() == Weak; 211 } 212 213 /// isObjCGCStrong true when Type is objc's strong. 214 bool isObjCGCStrong() const { 215 return getObjCGCAttr() == Strong; 216 } 217}; 218 219} // end clang. 220 221namespace llvm { 222/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 223/// to a specific Type class. 224template<> struct simplify_type<const ::clang::QualType> { 225 typedef ::clang::Type* SimpleType; 226 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 227 return Val.getTypePtr(); 228 } 229}; 230template<> struct simplify_type< ::clang::QualType> 231 : public simplify_type<const ::clang::QualType> {}; 232 233// Teach SmallPtrSet that QualType is "basically a pointer". 234template<> 235class PointerLikeTypeTraits<clang::QualType> { 236public: 237 static inline void *getAsVoidPointer(clang::QualType P) { 238 return P.getAsOpaquePtr(); 239 } 240 static inline clang::QualType getFromVoidPointer(void *P) { 241 return clang::QualType::getFromOpaquePtr(P); 242 } 243 // CVR qualifiers go in low bits. 244 enum { NumLowBitsAvailable = 0 }; 245}; 246} // end namespace llvm 247 248namespace clang { 249 250/// Type - This is the base class of the type hierarchy. A central concept 251/// with types is that each type always has a canonical type. A canonical type 252/// is the type with any typedef names stripped out of it or the types it 253/// references. For example, consider: 254/// 255/// typedef int foo; 256/// typedef foo* bar; 257/// 'int *' 'foo *' 'bar' 258/// 259/// There will be a Type object created for 'int'. Since int is canonical, its 260/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 261/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 262/// there is a PointerType that represents 'int*', which, like 'int', is 263/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 264/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 265/// is also 'int*'. 266/// 267/// Non-canonical types are useful for emitting diagnostics, without losing 268/// information about typedefs being used. Canonical types are useful for type 269/// comparisons (they allow by-pointer equality tests) and useful for reasoning 270/// about whether something has a particular form (e.g. is a function type), 271/// because they implicitly, recursively, strip all typedefs out of a type. 272/// 273/// Types, once created, are immutable. 274/// 275class Type { 276public: 277 enum TypeClass { 278#define TYPE(Class, Base) Class, 279#define ABSTRACT_TYPE(Class, Base) 280#include "clang/AST/TypeNodes.def" 281 TagFirst = Record, TagLast = Enum 282 }; 283 284private: 285 QualType CanonicalType; 286 287 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 288 bool Dependent : 1; 289 290 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 291 /// Note that this should stay at the end of the ivars for Type so that 292 /// subclasses can pack their bitfields into the same word. 293 unsigned TC : 5; 294 295 Type(const Type&); // DO NOT IMPLEMENT. 296 void operator=(const Type&); // DO NOT IMPLEMENT. 297protected: 298 // silence VC++ warning C4355: 'this' : used in base member initializer list 299 Type *this_() { return this; } 300 Type(TypeClass tc, QualType Canonical, bool dependent) 301 : CanonicalType(Canonical.isNull() ? QualType(this_(), 0) : Canonical), 302 Dependent(dependent), TC(tc) {} 303 virtual ~Type() {} 304 virtual void Destroy(ASTContext& C); 305 friend class ASTContext; 306 307public: 308 TypeClass getTypeClass() const { return static_cast<TypeClass>(TC); } 309 310 bool isCanonical() const { return CanonicalType.getTypePtr() == this; } 311 312 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 313 /// object types, function types, and incomplete types. 314 315 /// \brief Determines whether the type describes an object in memory. 316 /// 317 /// Note that this definition of object type corresponds to the C++ 318 /// definition of object type, which includes incomplete types, as 319 /// opposed to the C definition (which does not include incomplete 320 /// types). 321 bool isObjectType() const; 322 323 /// isIncompleteType - Return true if this is an incomplete type. 324 /// A type that can describe objects, but which lacks information needed to 325 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 326 /// routine will need to determine if the size is actually required. 327 bool isIncompleteType() const; 328 329 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 330 /// type, in other words, not a function type. 331 bool isIncompleteOrObjectType() const { 332 return !isFunctionType(); 333 } 334 335 /// isPODType - Return true if this is a plain-old-data type (C++ 3.9p10). 336 bool isPODType() const; 337 338 /// isVariablyModifiedType (C99 6.7.5.2p2) - Return true for variable array 339 /// types that have a non-constant expression. This does not include "[]". 340 bool isVariablyModifiedType() const; 341 342 /// Helper methods to distinguish type categories. All type predicates 343 /// operate on the canonical type, ignoring typedefs and qualifiers. 344 345 /// isSpecificBuiltinType - Test for a particular builtin type. 346 bool isSpecificBuiltinType(unsigned K) const; 347 348 /// isIntegerType() does *not* include complex integers (a GCC extension). 349 /// isComplexIntegerType() can be used to test for complex integers. 350 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 351 bool isEnumeralType() const; 352 bool isBooleanType() const; 353 bool isCharType() const; 354 bool isWideCharType() const; 355 bool isIntegralType() const; 356 357 /// Floating point categories. 358 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 359 /// isComplexType() does *not* include complex integers (a GCC extension). 360 /// isComplexIntegerType() can be used to test for complex integers. 361 bool isComplexType() const; // C99 6.2.5p11 (complex) 362 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 363 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 364 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 365 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 366 bool isVoidType() const; // C99 6.2.5p19 367 bool isDerivedType() const; // C99 6.2.5p20 368 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 369 bool isAggregateType() const; 370 371 // Type Predicates: Check to see if this type is structurally the specified 372 // type, ignoring typedefs and qualifiers. 373 bool isFunctionType() const; 374 bool isFunctionNoProtoType() const { return getAsFunctionNoProtoType() != 0; } 375 bool isFunctionProtoType() const { return getAsFunctionProtoType() != 0; } 376 bool isPointerType() const; 377 bool isBlockPointerType() const; 378 bool isReferenceType() const; 379 bool isLValueReferenceType() const; 380 bool isRValueReferenceType() const; 381 bool isFunctionPointerType() const; 382 bool isMemberPointerType() const; 383 bool isMemberFunctionPointerType() const; 384 bool isArrayType() const; 385 bool isConstantArrayType() const; 386 bool isIncompleteArrayType() const; 387 bool isVariableArrayType() const; 388 bool isDependentSizedArrayType() const; 389 bool isRecordType() const; 390 bool isClassType() const; 391 bool isStructureType() const; 392 bool isUnionType() const; 393 bool isComplexIntegerType() const; // GCC _Complex integer type. 394 bool isVectorType() const; // GCC vector type. 395 bool isExtVectorType() const; // Extended vector type. 396 bool isObjCInterfaceType() const; // NSString or NSString<foo> 397 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 398 bool isObjCQualifiedIdType() const; // id<foo> 399 bool isTemplateTypeParmType() const; // C++ template type parameter 400 bool isNullPtrType() const; // C++0x nullptr_t 401 402 /// isDependentType - Whether this type is a dependent type, meaning 403 /// that its definition somehow depends on a template parameter 404 /// (C++ [temp.dep.type]). 405 bool isDependentType() const { return Dependent; } 406 bool isOverloadableType() const; 407 408 /// hasPointerRepresentation - Whether this type is represented 409 /// natively as a pointer; this includes pointers, references, block 410 /// pointers, and Objective-C interface, qualified id, and qualified 411 /// interface types, as well as nullptr_t. 412 bool hasPointerRepresentation() const; 413 414 /// hasObjCPointerRepresentation - Whether this type can represent 415 /// an objective pointer type for the purpose of GC'ability 416 bool hasObjCPointerRepresentation() const; 417 418 // Type Checking Functions: Check to see if this type is structurally the 419 // specified type, ignoring typedefs and qualifiers, and return a pointer to 420 // the best type we can. 421 const BuiltinType *getAsBuiltinType() const; 422 const FunctionType *getAsFunctionType() const; 423 const FunctionNoProtoType *getAsFunctionNoProtoType() const; 424 const FunctionProtoType *getAsFunctionProtoType() const; 425 const PointerType *getAsPointerType() const; 426 const BlockPointerType *getAsBlockPointerType() const; 427 const ReferenceType *getAsReferenceType() const; 428 const LValueReferenceType *getAsLValueReferenceType() const; 429 const RValueReferenceType *getAsRValueReferenceType() const; 430 const MemberPointerType *getAsMemberPointerType() const; 431 const TagType *getAsTagType() const; 432 const RecordType *getAsRecordType() const; 433 const RecordType *getAsStructureType() const; 434 /// NOTE: getAs*ArrayType are methods on ASTContext. 435 const TypedefType *getAsTypedefType() const; 436 const RecordType *getAsUnionType() const; 437 const EnumType *getAsEnumType() const; 438 const VectorType *getAsVectorType() const; // GCC vector type. 439 const ComplexType *getAsComplexType() const; 440 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 441 const ExtVectorType *getAsExtVectorType() const; // Extended vector type. 442 const ObjCInterfaceType *getAsObjCInterfaceType() const; 443 const ObjCQualifiedInterfaceType *getAsObjCQualifiedInterfaceType() const; 444 const ObjCQualifiedIdType *getAsObjCQualifiedIdType() const; 445 const TemplateTypeParmType *getAsTemplateTypeParmType() const; 446 447 const TemplateSpecializationType * 448 getAsTemplateSpecializationType() const; 449 450 /// getAsPointerToObjCInterfaceType - If this is a pointer to an ObjC 451 /// interface, return the interface type, otherwise return null. 452 const ObjCInterfaceType *getAsPointerToObjCInterfaceType() const; 453 454 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 455 /// element type of the array, potentially with type qualifiers missing. 456 /// This method should never be used when type qualifiers are meaningful. 457 const Type *getArrayElementTypeNoTypeQual() const; 458 459 /// getDesugaredType - Return the specified type with any "sugar" removed from 460 /// the type. This takes off typedefs, typeof's etc. If the outer level of 461 /// the type is already concrete, it returns it unmodified. This is similar 462 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 463 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 464 /// concrete. 465 QualType getDesugaredType(bool ForDisplay = false) const; 466 467 /// More type predicates useful for type checking/promotion 468 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 469 470 /// isSignedIntegerType - Return true if this is an integer type that is 471 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 472 /// an enum decl which has a signed representation, or a vector of signed 473 /// integer element type. 474 bool isSignedIntegerType() const; 475 476 /// isUnsignedIntegerType - Return true if this is an integer type that is 477 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 478 /// decl which has an unsigned representation, or a vector of unsigned integer 479 /// element type. 480 bool isUnsignedIntegerType() const; 481 482 /// isConstantSizeType - Return true if this is not a variable sized type, 483 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 484 /// incomplete types. 485 bool isConstantSizeType() const; 486 487 /// isSpecifierType - Returns true if this type can be represented by some 488 /// set of type specifiers. 489 bool isSpecifierType() const; 490 491 QualType getCanonicalTypeInternal() const { return CanonicalType; } 492 void dump() const; 493 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const = 0; 494 static bool classof(const Type *) { return true; } 495}; 496 497/// ExtQualType - TR18037 (C embedded extensions) 6.2.5p26 498/// This supports all kinds of type attributes; including, 499/// address space qualified types, objective-c's __weak and 500/// __strong attributes. 501/// 502class ExtQualType : public Type, public llvm::FoldingSetNode { 503 /// BaseType - This is the underlying type that this qualifies. All CVR 504 /// qualifiers are stored on the QualType that references this type, so we 505 /// can't have any here. 506 Type *BaseType; 507 508 /// Address Space ID - The address space ID this type is qualified with. 509 unsigned AddressSpace; 510 /// GC __weak/__strong attributes 511 QualType::GCAttrTypes GCAttrType; 512 513 ExtQualType(Type *Base, QualType CanonicalPtr, unsigned AddrSpace, 514 QualType::GCAttrTypes gcAttr) : 515 Type(ExtQual, CanonicalPtr, Base->isDependentType()), BaseType(Base), 516 AddressSpace(AddrSpace), GCAttrType(gcAttr) { 517 assert(!isa<ExtQualType>(BaseType) && 518 "Cannot have ExtQualType of ExtQualType"); 519 } 520 friend class ASTContext; // ASTContext creates these. 521public: 522 Type *getBaseType() const { return BaseType; } 523 QualType::GCAttrTypes getObjCGCAttr() const { return GCAttrType; } 524 unsigned getAddressSpace() const { return AddressSpace; } 525 526 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 527 528 void Profile(llvm::FoldingSetNodeID &ID) { 529 Profile(ID, getBaseType(), AddressSpace, GCAttrType); 530 } 531 static void Profile(llvm::FoldingSetNodeID &ID, Type *Base, 532 unsigned AddrSpace, QualType::GCAttrTypes gcAttr) { 533 ID.AddPointer(Base); 534 ID.AddInteger(AddrSpace); 535 ID.AddInteger(gcAttr); 536 } 537 538 static bool classof(const Type *T) { return T->getTypeClass() == ExtQual; } 539 static bool classof(const ExtQualType *) { return true; } 540}; 541 542 543/// BuiltinType - This class is used for builtin types like 'int'. Builtin 544/// types are always canonical and have a literal name field. 545class BuiltinType : public Type { 546public: 547 enum Kind { 548 Void, 549 550 Bool, // This is bool and/or _Bool. 551 Char_U, // This is 'char' for targets where char is unsigned. 552 UChar, // This is explicitly qualified unsigned char. 553 UShort, 554 UInt, 555 ULong, 556 ULongLong, 557 UInt128, // __uint128_t 558 559 Char_S, // This is 'char' for targets where char is signed. 560 SChar, // This is explicitly qualified signed char. 561 WChar, // This is 'wchar_t' for C++. 562 Short, 563 Int, 564 Long, 565 LongLong, 566 Int128, // __int128_t 567 568 Float, Double, LongDouble, 569 570 NullPtr, // This is the type of C++0x 'nullptr'. 571 572 Overload, // This represents the type of an overloaded function declaration. 573 Dependent // This represents the type of a type-dependent expression. 574 }; 575private: 576 Kind TypeKind; 577public: 578 BuiltinType(Kind K) 579 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent)), 580 TypeKind(K) {} 581 582 Kind getKind() const { return TypeKind; } 583 const char *getName(bool CPlusPlus) const; 584 585 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 586 587 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 588 static bool classof(const BuiltinType *) { return true; } 589}; 590 591/// FixedWidthIntType - Used for arbitrary width types that we either don't 592/// want to or can't map to named integer types. These always have a lower 593/// integer rank than builtin types of the same width. 594class FixedWidthIntType : public Type { 595private: 596 unsigned Width; 597 bool Signed; 598public: 599 FixedWidthIntType(unsigned W, bool S) : Type(FixedWidthInt, QualType(), false), 600 Width(W), Signed(S) {} 601 602 unsigned getWidth() const { return Width; } 603 bool isSigned() const { return Signed; } 604 const char *getName() const; 605 606 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 607 608 static bool classof(const Type *T) { return T->getTypeClass() == FixedWidthInt; } 609 static bool classof(const FixedWidthIntType *) { return true; } 610}; 611 612/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 613/// types (_Complex float etc) as well as the GCC integer complex extensions. 614/// 615class ComplexType : public Type, public llvm::FoldingSetNode { 616 QualType ElementType; 617 ComplexType(QualType Element, QualType CanonicalPtr) : 618 Type(Complex, CanonicalPtr, Element->isDependentType()), 619 ElementType(Element) { 620 } 621 friend class ASTContext; // ASTContext creates these. 622public: 623 QualType getElementType() const { return ElementType; } 624 625 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 626 627 void Profile(llvm::FoldingSetNodeID &ID) { 628 Profile(ID, getElementType()); 629 } 630 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 631 ID.AddPointer(Element.getAsOpaquePtr()); 632 } 633 634 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 635 static bool classof(const ComplexType *) { return true; } 636}; 637 638/// PointerType - C99 6.7.5.1 - Pointer Declarators. 639/// 640class PointerType : public Type, public llvm::FoldingSetNode { 641 QualType PointeeType; 642 643 PointerType(QualType Pointee, QualType CanonicalPtr) : 644 Type(Pointer, CanonicalPtr, Pointee->isDependentType()), PointeeType(Pointee) { 645 } 646 friend class ASTContext; // ASTContext creates these. 647public: 648 649 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 650 651 QualType getPointeeType() const { return PointeeType; } 652 653 void Profile(llvm::FoldingSetNodeID &ID) { 654 Profile(ID, getPointeeType()); 655 } 656 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 657 ID.AddPointer(Pointee.getAsOpaquePtr()); 658 } 659 660 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 661 static bool classof(const PointerType *) { return true; } 662}; 663 664/// BlockPointerType - pointer to a block type. 665/// This type is to represent types syntactically represented as 666/// "void (^)(int)", etc. Pointee is required to always be a function type. 667/// 668class BlockPointerType : public Type, public llvm::FoldingSetNode { 669 QualType PointeeType; // Block is some kind of pointer type 670 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 671 Type(BlockPointer, CanonicalCls, Pointee->isDependentType()), 672 PointeeType(Pointee) { 673 } 674 friend class ASTContext; // ASTContext creates these. 675public: 676 677 // Get the pointee type. Pointee is required to always be a function type. 678 QualType getPointeeType() const { return PointeeType; } 679 680 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 681 682 void Profile(llvm::FoldingSetNodeID &ID) { 683 Profile(ID, getPointeeType()); 684 } 685 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 686 ID.AddPointer(Pointee.getAsOpaquePtr()); 687 } 688 689 static bool classof(const Type *T) { 690 return T->getTypeClass() == BlockPointer; 691 } 692 static bool classof(const BlockPointerType *) { return true; } 693}; 694 695/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 696/// 697class ReferenceType : public Type, public llvm::FoldingSetNode { 698 QualType PointeeType; 699 700protected: 701 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef) : 702 Type(tc, CanonicalRef, Referencee->isDependentType()), 703 PointeeType(Referencee) { 704 } 705public: 706 QualType getPointeeType() const { return PointeeType; } 707 708 void Profile(llvm::FoldingSetNodeID &ID) { 709 Profile(ID, getPointeeType()); 710 } 711 static void Profile(llvm::FoldingSetNodeID &ID, QualType Referencee) { 712 ID.AddPointer(Referencee.getAsOpaquePtr()); 713 } 714 715 static bool classof(const Type *T) { 716 return T->getTypeClass() == LValueReference || 717 T->getTypeClass() == RValueReference; 718 } 719 static bool classof(const ReferenceType *) { return true; } 720}; 721 722/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 723/// 724class LValueReferenceType : public ReferenceType { 725 LValueReferenceType(QualType Referencee, QualType CanonicalRef) : 726 ReferenceType(LValueReference, Referencee, CanonicalRef) { 727 } 728 friend class ASTContext; // ASTContext creates these 729public: 730 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 731 732 static bool classof(const Type *T) { 733 return T->getTypeClass() == LValueReference; 734 } 735 static bool classof(const LValueReferenceType *) { return true; } 736}; 737 738/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 739/// 740class RValueReferenceType : public ReferenceType { 741 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 742 ReferenceType(RValueReference, Referencee, CanonicalRef) { 743 } 744 friend class ASTContext; // ASTContext creates these 745public: 746 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 747 748 static bool classof(const Type *T) { 749 return T->getTypeClass() == RValueReference; 750 } 751 static bool classof(const RValueReferenceType *) { return true; } 752}; 753 754/// MemberPointerType - C++ 8.3.3 - Pointers to members 755/// 756class MemberPointerType : public Type, public llvm::FoldingSetNode { 757 QualType PointeeType; 758 /// The class of which the pointee is a member. Must ultimately be a 759 /// RecordType, but could be a typedef or a template parameter too. 760 const Type *Class; 761 762 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 763 Type(MemberPointer, CanonicalPtr, 764 Cls->isDependentType() || Pointee->isDependentType()), 765 PointeeType(Pointee), Class(Cls) { 766 } 767 friend class ASTContext; // ASTContext creates these. 768public: 769 770 QualType getPointeeType() const { return PointeeType; } 771 772 const Type *getClass() const { return Class; } 773 774 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 775 776 void Profile(llvm::FoldingSetNodeID &ID) { 777 Profile(ID, getPointeeType(), getClass()); 778 } 779 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 780 const Type *Class) { 781 ID.AddPointer(Pointee.getAsOpaquePtr()); 782 ID.AddPointer(Class); 783 } 784 785 static bool classof(const Type *T) { 786 return T->getTypeClass() == MemberPointer; 787 } 788 static bool classof(const MemberPointerType *) { return true; } 789}; 790 791/// ArrayType - C99 6.7.5.2 - Array Declarators. 792/// 793class ArrayType : public Type, public llvm::FoldingSetNode { 794public: 795 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 796 /// an array with a static size (e.g. int X[static 4]), or an array 797 /// with a star size (e.g. int X[*]). 798 /// 'static' is only allowed on function parameters. 799 enum ArraySizeModifier { 800 Normal, Static, Star 801 }; 802private: 803 /// ElementType - The element type of the array. 804 QualType ElementType; 805 806 // NOTE: VC++ treats enums as signed, avoid using the ArraySizeModifier enum 807 /// NOTE: These fields are packed into the bitfields space in the Type class. 808 unsigned SizeModifier : 2; 809 810 /// IndexTypeQuals - Capture qualifiers in declarations like: 811 /// 'int X[static restrict 4]'. For function parameters only. 812 unsigned IndexTypeQuals : 3; 813 814protected: 815 // C++ [temp.dep.type]p1: 816 // A type is dependent if it is... 817 // - an array type constructed from any dependent type or whose 818 // size is specified by a constant expression that is 819 // value-dependent, 820 ArrayType(TypeClass tc, QualType et, QualType can, 821 ArraySizeModifier sm, unsigned tq) 822 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray), 823 ElementType(et), SizeModifier(sm), IndexTypeQuals(tq) {} 824 825 friend class ASTContext; // ASTContext creates these. 826public: 827 QualType getElementType() const { return ElementType; } 828 ArraySizeModifier getSizeModifier() const { 829 return ArraySizeModifier(SizeModifier); 830 } 831 unsigned getIndexTypeQualifier() const { return IndexTypeQuals; } 832 833 static bool classof(const Type *T) { 834 return T->getTypeClass() == ConstantArray || 835 T->getTypeClass() == VariableArray || 836 T->getTypeClass() == IncompleteArray || 837 T->getTypeClass() == DependentSizedArray; 838 } 839 static bool classof(const ArrayType *) { return true; } 840}; 841 842/// ConstantArrayType - This class represents C arrays with a specified constant 843/// size. For example 'int A[100]' has ConstantArrayType where the element type 844/// is 'int' and the size is 100. 845class ConstantArrayType : public ArrayType { 846 llvm::APInt Size; // Allows us to unique the type. 847 848 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 849 ArraySizeModifier sm, unsigned tq) 850 : ArrayType(ConstantArray, et, can, sm, tq), Size(size) {} 851 friend class ASTContext; // ASTContext creates these. 852public: 853 const llvm::APInt &getSize() const { return Size; } 854 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 855 856 void Profile(llvm::FoldingSetNodeID &ID) { 857 Profile(ID, getElementType(), getSize(), 858 getSizeModifier(), getIndexTypeQualifier()); 859 } 860 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 861 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 862 unsigned TypeQuals) { 863 ID.AddPointer(ET.getAsOpaquePtr()); 864 ID.AddInteger(ArraySize.getZExtValue()); 865 ID.AddInteger(SizeMod); 866 ID.AddInteger(TypeQuals); 867 } 868 static bool classof(const Type *T) { 869 return T->getTypeClass() == ConstantArray; 870 } 871 static bool classof(const ConstantArrayType *) { return true; } 872}; 873 874/// IncompleteArrayType - This class represents C arrays with an unspecified 875/// size. For example 'int A[]' has an IncompleteArrayType where the element 876/// type is 'int' and the size is unspecified. 877class IncompleteArrayType : public ArrayType { 878 IncompleteArrayType(QualType et, QualType can, 879 ArraySizeModifier sm, unsigned tq) 880 : ArrayType(IncompleteArray, et, can, sm, tq) {} 881 friend class ASTContext; // ASTContext creates these. 882public: 883 884 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 885 886 static bool classof(const Type *T) { 887 return T->getTypeClass() == IncompleteArray; 888 } 889 static bool classof(const IncompleteArrayType *) { return true; } 890 891 friend class StmtIteratorBase; 892 893 void Profile(llvm::FoldingSetNodeID &ID) { 894 Profile(ID, getElementType(), getSizeModifier(), getIndexTypeQualifier()); 895 } 896 897 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 898 ArraySizeModifier SizeMod, unsigned TypeQuals) { 899 ID.AddPointer(ET.getAsOpaquePtr()); 900 ID.AddInteger(SizeMod); 901 ID.AddInteger(TypeQuals); 902 } 903}; 904 905/// VariableArrayType - This class represents C arrays with a specified size 906/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 907/// Since the size expression is an arbitrary expression, we store it as such. 908/// 909/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 910/// should not be: two lexically equivalent variable array types could mean 911/// different things, for example, these variables do not have the same type 912/// dynamically: 913/// 914/// void foo(int x) { 915/// int Y[x]; 916/// ++x; 917/// int Z[x]; 918/// } 919/// 920class VariableArrayType : public ArrayType { 921 /// SizeExpr - An assignment expression. VLA's are only permitted within 922 /// a function block. 923 Stmt *SizeExpr; 924 925 VariableArrayType(QualType et, QualType can, Expr *e, 926 ArraySizeModifier sm, unsigned tq) 927 : ArrayType(VariableArray, et, can, sm, tq), SizeExpr((Stmt*) e) {} 928 friend class ASTContext; // ASTContext creates these. 929 virtual void Destroy(ASTContext& C); 930 931public: 932 Expr *getSizeExpr() const { 933 // We use C-style casts instead of cast<> here because we do not wish 934 // to have a dependency of Type.h on Stmt.h/Expr.h. 935 return (Expr*) SizeExpr; 936 } 937 938 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 939 940 static bool classof(const Type *T) { 941 return T->getTypeClass() == VariableArray; 942 } 943 static bool classof(const VariableArrayType *) { return true; } 944 945 friend class StmtIteratorBase; 946 947 void Profile(llvm::FoldingSetNodeID &ID) { 948 assert(0 && "Cannnot unique VariableArrayTypes."); 949 } 950}; 951 952/// DependentSizedArrayType - This type represents an array type in 953/// C++ whose size is a value-dependent expression. For example: 954/// @code 955/// template<typename T, int Size> 956/// class array { 957/// T data[Size]; 958/// }; 959/// @endcode 960/// For these types, we won't actually know what the array bound is 961/// until template instantiation occurs, at which point this will 962/// become either a ConstantArrayType or a VariableArrayType. 963class DependentSizedArrayType : public ArrayType { 964 /// SizeExpr - An assignment expression that will instantiate to the 965 /// size of the array. 966 Stmt *SizeExpr; 967 968 DependentSizedArrayType(QualType et, QualType can, Expr *e, 969 ArraySizeModifier sm, unsigned tq) 970 : ArrayType(DependentSizedArray, et, can, sm, tq), SizeExpr((Stmt*) e) {} 971 friend class ASTContext; // ASTContext creates these. 972 virtual void Destroy(ASTContext& C); 973 974public: 975 Expr *getSizeExpr() const { 976 // We use C-style casts instead of cast<> here because we do not wish 977 // to have a dependency of Type.h on Stmt.h/Expr.h. 978 return (Expr*) SizeExpr; 979 } 980 981 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 982 983 static bool classof(const Type *T) { 984 return T->getTypeClass() == DependentSizedArray; 985 } 986 static bool classof(const DependentSizedArrayType *) { return true; } 987 988 friend class StmtIteratorBase; 989 990 void Profile(llvm::FoldingSetNodeID &ID) { 991 assert(0 && "Cannnot unique DependentSizedArrayTypes."); 992 } 993}; 994 995/// DependentSizedExtVectorType - This type represent an ext vectory type 996/// where either the type or size is dependent. For example: 997/// @code 998/// template<typename T, int Size> 999/// class vector { 1000/// typedef T __attribute__((ext_vector_type(Size))) type; 1001/// } 1002/// @endcode 1003class DependentSizedExtVectorType : public Type { 1004 Expr *SizeExpr; 1005 /// ElementType - The element type of the array. 1006 QualType ElementType; 1007 SourceLocation loc; 1008 1009 DependentSizedExtVectorType(QualType ElementType, QualType can, 1010 Expr *SizeExpr, SourceLocation loc) 1011 : Type (DependentSizedExtVector, can, true), 1012 SizeExpr(SizeExpr), ElementType(ElementType), loc(loc) {} 1013 friend class ASTContext; 1014 virtual void Destroy(ASTContext& C); 1015 1016public: 1017 Expr *getSizeExpr() const { return SizeExpr; } 1018 QualType getElementType() const { return ElementType; } 1019 SourceLocation getAttributeLoc() const { return loc; } 1020 1021 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 1022 1023 static bool classof(const Type *T) { 1024 return T->getTypeClass() == DependentSizedExtVector; 1025 } 1026 static bool classof(const DependentSizedExtVectorType *) { return true; } 1027}; 1028 1029 1030/// VectorType - GCC generic vector type. This type is created using 1031/// __attribute__((vector_size(n)), where "n" specifies the vector size in 1032/// bytes. Since the constructor takes the number of vector elements, the 1033/// client is responsible for converting the size into the number of elements. 1034class VectorType : public Type, public llvm::FoldingSetNode { 1035protected: 1036 /// ElementType - The element type of the vector. 1037 QualType ElementType; 1038 1039 /// NumElements - The number of elements in the vector. 1040 unsigned NumElements; 1041 1042 VectorType(QualType vecType, unsigned nElements, QualType canonType) : 1043 Type(Vector, canonType, vecType->isDependentType()), 1044 ElementType(vecType), NumElements(nElements) {} 1045 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 1046 QualType canonType) 1047 : Type(tc, canonType, vecType->isDependentType()), ElementType(vecType), 1048 NumElements(nElements) {} 1049 friend class ASTContext; // ASTContext creates these. 1050public: 1051 1052 QualType getElementType() const { return ElementType; } 1053 unsigned getNumElements() const { return NumElements; } 1054 1055 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 1056 1057 void Profile(llvm::FoldingSetNodeID &ID) { 1058 Profile(ID, getElementType(), getNumElements(), getTypeClass()); 1059 } 1060 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 1061 unsigned NumElements, TypeClass TypeClass) { 1062 ID.AddPointer(ElementType.getAsOpaquePtr()); 1063 ID.AddInteger(NumElements); 1064 ID.AddInteger(TypeClass); 1065 } 1066 static bool classof(const Type *T) { 1067 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 1068 } 1069 static bool classof(const VectorType *) { return true; } 1070}; 1071 1072/// ExtVectorType - Extended vector type. This type is created using 1073/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 1074/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 1075/// class enables syntactic extensions, like Vector Components for accessing 1076/// points, colors, and textures (modeled after OpenGL Shading Language). 1077class ExtVectorType : public VectorType { 1078 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 1079 VectorType(ExtVector, vecType, nElements, canonType) {} 1080 friend class ASTContext; // ASTContext creates these. 1081public: 1082 static int getPointAccessorIdx(char c) { 1083 switch (c) { 1084 default: return -1; 1085 case 'x': return 0; 1086 case 'y': return 1; 1087 case 'z': return 2; 1088 case 'w': return 3; 1089 } 1090 } 1091 static int getNumericAccessorIdx(char c) { 1092 switch (c) { 1093 default: return -1; 1094 case '0': return 0; 1095 case '1': return 1; 1096 case '2': return 2; 1097 case '3': return 3; 1098 case '4': return 4; 1099 case '5': return 5; 1100 case '6': return 6; 1101 case '7': return 7; 1102 case '8': return 8; 1103 case '9': return 9; 1104 case 'a': return 10; 1105 case 'b': return 11; 1106 case 'c': return 12; 1107 case 'd': return 13; 1108 case 'e': return 14; 1109 case 'f': return 15; 1110 } 1111 } 1112 1113 static int getAccessorIdx(char c) { 1114 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 1115 return getNumericAccessorIdx(c); 1116 } 1117 1118 bool isAccessorWithinNumElements(char c) const { 1119 if (int idx = getAccessorIdx(c)+1) 1120 return unsigned(idx-1) < NumElements; 1121 return false; 1122 } 1123 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 1124 1125 static bool classof(const Type *T) { 1126 return T->getTypeClass() == ExtVector; 1127 } 1128 static bool classof(const ExtVectorType *) { return true; } 1129}; 1130 1131/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 1132/// class of FunctionNoProtoType and FunctionProtoType. 1133/// 1134class FunctionType : public Type { 1135 /// SubClassData - This field is owned by the subclass, put here to pack 1136 /// tightly with the ivars in Type. 1137 bool SubClassData : 1; 1138 1139 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1140 /// other bitfields. 1141 /// The qualifiers are part of FunctionProtoType because... 1142 /// 1143 /// C++ 8.3.5p4: The return type, the parameter type list and the 1144 /// cv-qualifier-seq, [...], are part of the function type. 1145 /// 1146 unsigned TypeQuals : 3; 1147 1148 // The type returned by the function. 1149 QualType ResultType; 1150protected: 1151 FunctionType(TypeClass tc, QualType res, bool SubclassInfo, 1152 unsigned typeQuals, QualType Canonical, bool Dependent) 1153 : Type(tc, Canonical, Dependent), 1154 SubClassData(SubclassInfo), TypeQuals(typeQuals), ResultType(res) {} 1155 bool getSubClassData() const { return SubClassData; } 1156 unsigned getTypeQuals() const { return TypeQuals; } 1157public: 1158 1159 QualType getResultType() const { return ResultType; } 1160 1161 1162 static bool classof(const Type *T) { 1163 return T->getTypeClass() == FunctionNoProto || 1164 T->getTypeClass() == FunctionProto; 1165 } 1166 static bool classof(const FunctionType *) { return true; } 1167}; 1168 1169/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 1170/// no information available about its arguments. 1171class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 1172 FunctionNoProtoType(QualType Result, QualType Canonical) 1173 : FunctionType(FunctionNoProto, Result, false, 0, Canonical, 1174 /*Dependent=*/false) {} 1175 friend class ASTContext; // ASTContext creates these. 1176public: 1177 // No additional state past what FunctionType provides. 1178 1179 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 1180 1181 void Profile(llvm::FoldingSetNodeID &ID) { 1182 Profile(ID, getResultType()); 1183 } 1184 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType) { 1185 ID.AddPointer(ResultType.getAsOpaquePtr()); 1186 } 1187 1188 static bool classof(const Type *T) { 1189 return T->getTypeClass() == FunctionNoProto; 1190 } 1191 static bool classof(const FunctionNoProtoType *) { return true; } 1192}; 1193 1194/// FunctionProtoType - Represents a prototype with argument type info, e.g. 1195/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 1196/// arguments, not as having a single void argument. Such a type can have an 1197/// exception specification, but this specification is not part of the canonical 1198/// type. 1199class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 1200 /// hasAnyDependentType - Determine whether there are any dependent 1201 /// types within the arguments passed in. 1202 static bool hasAnyDependentType(const QualType *ArgArray, unsigned numArgs) { 1203 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 1204 if (ArgArray[Idx]->isDependentType()) 1205 return true; 1206 1207 return false; 1208 } 1209 1210 FunctionProtoType(QualType Result, const QualType *ArgArray, unsigned numArgs, 1211 bool isVariadic, unsigned typeQuals, bool hasExs, 1212 bool hasAnyExs, const QualType *ExArray, 1213 unsigned numExs, QualType Canonical) 1214 : FunctionType(FunctionProto, Result, isVariadic, typeQuals, Canonical, 1215 (Result->isDependentType() || 1216 hasAnyDependentType(ArgArray, numArgs))), 1217 NumArgs(numArgs), NumExceptions(numExs), HasExceptionSpec(hasExs), 1218 AnyExceptionSpec(hasAnyExs) { 1219 // Fill in the trailing argument array. 1220 QualType *ArgInfo = reinterpret_cast<QualType*>(this+1); 1221 for (unsigned i = 0; i != numArgs; ++i) 1222 ArgInfo[i] = ArgArray[i]; 1223 // Fill in the exception array. 1224 QualType *Ex = ArgInfo + numArgs; 1225 for (unsigned i = 0; i != numExs; ++i) 1226 Ex[i] = ExArray[i]; 1227 } 1228 1229 /// NumArgs - The number of arguments this function has, not counting '...'. 1230 unsigned NumArgs : 20; 1231 1232 /// NumExceptions - The number of types in the exception spec, if any. 1233 unsigned NumExceptions : 10; 1234 1235 /// HasExceptionSpec - Whether this function has an exception spec at all. 1236 bool HasExceptionSpec : 1; 1237 1238 /// AnyExceptionSpec - Whether this function has a throw(...) spec. 1239 bool AnyExceptionSpec : 1; 1240 1241 /// ArgInfo - There is an variable size array after the class in memory that 1242 /// holds the argument types. 1243 1244 /// Exceptions - There is another variable size array after ArgInfo that 1245 /// holds the exception types. 1246 1247 friend class ASTContext; // ASTContext creates these. 1248 1249public: 1250 unsigned getNumArgs() const { return NumArgs; } 1251 QualType getArgType(unsigned i) const { 1252 assert(i < NumArgs && "Invalid argument number!"); 1253 return arg_type_begin()[i]; 1254 } 1255 1256 bool hasExceptionSpec() const { return HasExceptionSpec; } 1257 bool hasAnyExceptionSpec() const { return AnyExceptionSpec; } 1258 unsigned getNumExceptions() const { return NumExceptions; } 1259 QualType getExceptionType(unsigned i) const { 1260 assert(i < NumExceptions && "Invalid exception number!"); 1261 return exception_begin()[i]; 1262 } 1263 bool hasEmptyExceptionSpec() const { 1264 return hasExceptionSpec() && !hasAnyExceptionSpec() && 1265 getNumExceptions() == 0; 1266 } 1267 1268 bool isVariadic() const { return getSubClassData(); } 1269 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 1270 1271 typedef const QualType *arg_type_iterator; 1272 arg_type_iterator arg_type_begin() const { 1273 return reinterpret_cast<const QualType *>(this+1); 1274 } 1275 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 1276 1277 typedef const QualType *exception_iterator; 1278 exception_iterator exception_begin() const { 1279 // exceptions begin where arguments end 1280 return arg_type_end(); 1281 } 1282 exception_iterator exception_end() const { 1283 return exception_begin() + NumExceptions; 1284 } 1285 1286 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 1287 1288 static bool classof(const Type *T) { 1289 return T->getTypeClass() == FunctionProto; 1290 } 1291 static bool classof(const FunctionProtoType *) { return true; } 1292 1293 void Profile(llvm::FoldingSetNodeID &ID); 1294 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 1295 arg_type_iterator ArgTys, unsigned NumArgs, 1296 bool isVariadic, unsigned TypeQuals, 1297 bool hasExceptionSpec, bool anyExceptionSpec, 1298 unsigned NumExceptions, exception_iterator Exs); 1299}; 1300 1301 1302class TypedefType : public Type { 1303 TypedefDecl *Decl; 1304protected: 1305 TypedefType(TypeClass tc, TypedefDecl *D, QualType can) 1306 : Type(tc, can, can->isDependentType()), Decl(D) { 1307 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1308 } 1309 friend class ASTContext; // ASTContext creates these. 1310public: 1311 1312 TypedefDecl *getDecl() const { return Decl; } 1313 1314 /// LookThroughTypedefs - Return the ultimate type this typedef corresponds to 1315 /// potentially looking through *all* consecutive typedefs. This returns the 1316 /// sum of the type qualifiers, so if you have: 1317 /// typedef const int A; 1318 /// typedef volatile A B; 1319 /// looking through the typedefs for B will give you "const volatile A". 1320 QualType LookThroughTypedefs() const; 1321 1322 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 1323 1324 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 1325 static bool classof(const TypedefType *) { return true; } 1326}; 1327 1328/// TypeOfExprType (GCC extension). 1329class TypeOfExprType : public Type { 1330 Expr *TOExpr; 1331 TypeOfExprType(Expr *E, QualType can); 1332 friend class ASTContext; // ASTContext creates these. 1333public: 1334 Expr *getUnderlyingExpr() const { return TOExpr; } 1335 1336 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 1337 1338 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 1339 static bool classof(const TypeOfExprType *) { return true; } 1340}; 1341 1342/// TypeOfType (GCC extension). 1343class TypeOfType : public Type { 1344 QualType TOType; 1345 TypeOfType(QualType T, QualType can) 1346 : Type(TypeOf, can, T->isDependentType()), TOType(T) { 1347 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1348 } 1349 friend class ASTContext; // ASTContext creates these. 1350public: 1351 QualType getUnderlyingType() const { return TOType; } 1352 1353 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 1354 1355 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 1356 static bool classof(const TypeOfType *) { return true; } 1357}; 1358 1359class TagType : public Type { 1360 /// Stores the TagDecl associated with this type. The decl will 1361 /// point to the TagDecl that actually defines the entity (or is a 1362 /// definition in progress), if there is such a definition. The 1363 /// single-bit value will be non-zero when this tag is in the 1364 /// process of being defined. 1365 mutable llvm::PointerIntPair<TagDecl *, 1> decl; 1366 friend class ASTContext; 1367 friend class TagDecl; 1368 1369protected: 1370 TagType(TypeClass TC, TagDecl *D, QualType can); 1371 1372public: 1373 TagDecl *getDecl() const { return decl.getPointer(); } 1374 1375 /// @brief Determines whether this type is in the process of being 1376 /// defined. 1377 bool isBeingDefined() const { return decl.getInt(); } 1378 void setBeingDefined(bool Def) { decl.setInt(Def? 1 : 0); } 1379 1380 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 1381 1382 static bool classof(const Type *T) { 1383 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 1384 } 1385 static bool classof(const TagType *) { return true; } 1386 static bool classof(const RecordType *) { return true; } 1387 static bool classof(const EnumType *) { return true; } 1388}; 1389 1390/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 1391/// to detect TagType objects of structs/unions/classes. 1392class RecordType : public TagType { 1393protected: 1394 explicit RecordType(RecordDecl *D) 1395 : TagType(Record, reinterpret_cast<TagDecl*>(D), QualType()) { } 1396 explicit RecordType(TypeClass TC, RecordDecl *D) 1397 : TagType(TC, reinterpret_cast<TagDecl*>(D), QualType()) { } 1398 friend class ASTContext; // ASTContext creates these. 1399public: 1400 1401 RecordDecl *getDecl() const { 1402 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 1403 } 1404 1405 // FIXME: This predicate is a helper to QualType/Type. It needs to 1406 // recursively check all fields for const-ness. If any field is declared 1407 // const, it needs to return false. 1408 bool hasConstFields() const { return false; } 1409 1410 // FIXME: RecordType needs to check when it is created that all fields are in 1411 // the same address space, and return that. 1412 unsigned getAddressSpace() const { return 0; } 1413 1414 static bool classof(const TagType *T); 1415 static bool classof(const Type *T) { 1416 return isa<TagType>(T) && classof(cast<TagType>(T)); 1417 } 1418 static bool classof(const RecordType *) { return true; } 1419}; 1420 1421/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 1422/// to detect TagType objects of enums. 1423class EnumType : public TagType { 1424 explicit EnumType(EnumDecl *D) 1425 : TagType(Enum, reinterpret_cast<TagDecl*>(D), QualType()) { } 1426 friend class ASTContext; // ASTContext creates these. 1427public: 1428 1429 EnumDecl *getDecl() const { 1430 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 1431 } 1432 1433 static bool classof(const TagType *T); 1434 static bool classof(const Type *T) { 1435 return isa<TagType>(T) && classof(cast<TagType>(T)); 1436 } 1437 static bool classof(const EnumType *) { return true; } 1438}; 1439 1440class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 1441 unsigned Depth : 15; 1442 unsigned Index : 16; 1443 unsigned ParameterPack : 1; 1444 IdentifierInfo *Name; 1445 1446 TemplateTypeParmType(unsigned D, unsigned I, bool PP, IdentifierInfo *N, 1447 QualType Canon) 1448 : Type(TemplateTypeParm, Canon, /*Dependent=*/true), 1449 Depth(D), Index(I), ParameterPack(PP), Name(N) { } 1450 1451 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 1452 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true), 1453 Depth(D), Index(I), ParameterPack(PP), Name(0) { } 1454 1455 friend class ASTContext; // ASTContext creates these 1456 1457public: 1458 unsigned getDepth() const { return Depth; } 1459 unsigned getIndex() const { return Index; } 1460 bool isParameterPack() const { return ParameterPack; } 1461 IdentifierInfo *getName() const { return Name; } 1462 1463 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 1464 1465 void Profile(llvm::FoldingSetNodeID &ID) { 1466 Profile(ID, Depth, Index, ParameterPack, Name); 1467 } 1468 1469 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 1470 unsigned Index, bool ParameterPack, 1471 IdentifierInfo *Name) { 1472 ID.AddInteger(Depth); 1473 ID.AddInteger(Index); 1474 ID.AddBoolean(ParameterPack); 1475 ID.AddPointer(Name); 1476 } 1477 1478 static bool classof(const Type *T) { 1479 return T->getTypeClass() == TemplateTypeParm; 1480 } 1481 static bool classof(const TemplateTypeParmType *T) { return true; } 1482}; 1483 1484/// \brief Represents the type of a template specialization as written 1485/// in the source code. 1486/// 1487/// Template specialization types represent the syntactic form of a 1488/// template-id that refers to a type, e.g., @c vector<int>. Some 1489/// template specialization types are syntactic sugar, whose canonical 1490/// type will point to some other type node that represents the 1491/// instantiation or class template specialization. For example, a 1492/// class template specialization type of @c vector<int> will refer to 1493/// a tag type for the instantiation 1494/// @c std::vector<int, std::allocator<int>>. 1495/// 1496/// Other template specialization types, for which the template name 1497/// is dependent, may be canonical types. These types are always 1498/// dependent. 1499class TemplateSpecializationType 1500 : public Type, public llvm::FoldingSetNode { 1501 1502 /// \brief The name of the template being specialized. 1503 TemplateName Template; 1504 1505 /// \brief - The number of template arguments named in this class 1506 /// template specialization. 1507 unsigned NumArgs; 1508 1509 TemplateSpecializationType(TemplateName T, 1510 const TemplateArgument *Args, 1511 unsigned NumArgs, QualType Canon); 1512 1513 virtual void Destroy(ASTContext& C); 1514 1515 friend class ASTContext; // ASTContext creates these 1516 1517public: 1518 /// \brief Determine whether any of the given template arguments are 1519 /// dependent. 1520 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 1521 unsigned NumArgs); 1522 1523 /// \brief Print a template argument list, including the '<' and '>' 1524 /// enclosing the template arguments. 1525 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 1526 unsigned NumArgs, 1527 const PrintingPolicy &Policy); 1528 1529 typedef const TemplateArgument * iterator; 1530 1531 iterator begin() const { return getArgs(); } 1532 iterator end() const; 1533 1534 /// \brief Retrieve the name of the template that we are specializing. 1535 TemplateName getTemplateName() const { return Template; } 1536 1537 /// \brief Retrieve the template arguments. 1538 const TemplateArgument *getArgs() const { 1539 return reinterpret_cast<const TemplateArgument *>(this + 1); 1540 } 1541 1542 /// \brief Retrieve the number of template arguments. 1543 unsigned getNumArgs() const { return NumArgs; } 1544 1545 /// \brief Retrieve a specific template argument as a type. 1546 /// \precondition @c isArgType(Arg) 1547 const TemplateArgument &getArg(unsigned Idx) const; 1548 1549 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 1550 1551 void Profile(llvm::FoldingSetNodeID &ID) { 1552 Profile(ID, Template, getArgs(), NumArgs); 1553 } 1554 1555 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 1556 const TemplateArgument *Args, unsigned NumArgs); 1557 1558 static bool classof(const Type *T) { 1559 return T->getTypeClass() == TemplateSpecialization; 1560 } 1561 static bool classof(const TemplateSpecializationType *T) { return true; } 1562}; 1563 1564/// \brief Represents a type that was referred to via a qualified 1565/// name, e.g., N::M::type. 1566/// 1567/// This type is used to keep track of a type name as written in the 1568/// source code, including any nested-name-specifiers. The type itself 1569/// is always "sugar", used to express what was written in the source 1570/// code but containing no additional semantic information. 1571class QualifiedNameType : public Type, public llvm::FoldingSetNode { 1572 /// \brief The nested name specifier containing the qualifier. 1573 NestedNameSpecifier *NNS; 1574 1575 /// \brief The type that this qualified name refers to. 1576 QualType NamedType; 1577 1578 QualifiedNameType(NestedNameSpecifier *NNS, QualType NamedType, 1579 QualType CanonType) 1580 : Type(QualifiedName, CanonType, NamedType->isDependentType()), 1581 NNS(NNS), NamedType(NamedType) { } 1582 1583 friend class ASTContext; // ASTContext creates these 1584 1585public: 1586 /// \brief Retrieve the qualification on this type. 1587 NestedNameSpecifier *getQualifier() const { return NNS; } 1588 1589 /// \brief Retrieve the type named by the qualified-id. 1590 QualType getNamedType() const { return NamedType; } 1591 1592 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 1593 1594 void Profile(llvm::FoldingSetNodeID &ID) { 1595 Profile(ID, NNS, NamedType); 1596 } 1597 1598 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 1599 QualType NamedType) { 1600 ID.AddPointer(NNS); 1601 NamedType.Profile(ID); 1602 } 1603 1604 static bool classof(const Type *T) { 1605 return T->getTypeClass() == QualifiedName; 1606 } 1607 static bool classof(const QualifiedNameType *T) { return true; } 1608}; 1609 1610/// \brief Represents a 'typename' specifier that names a type within 1611/// a dependent type, e.g., "typename T::type". 1612/// 1613/// TypenameType has a very similar structure to QualifiedNameType, 1614/// which also involves a nested-name-specifier following by a type, 1615/// and (FIXME!) both can even be prefixed by the 'typename' 1616/// keyword. However, the two types serve very different roles: 1617/// QualifiedNameType is a non-semantic type that serves only as sugar 1618/// to show how a particular type was written in the source 1619/// code. TypenameType, on the other hand, only occurs when the 1620/// nested-name-specifier is dependent, such that we cannot resolve 1621/// the actual type until after instantiation. 1622class TypenameType : public Type, public llvm::FoldingSetNode { 1623 /// \brief The nested name specifier containing the qualifier. 1624 NestedNameSpecifier *NNS; 1625 1626 typedef llvm::PointerUnion<const IdentifierInfo *, 1627 const TemplateSpecializationType *> NameType; 1628 1629 /// \brief The type that this typename specifier refers to. 1630 NameType Name; 1631 1632 TypenameType(NestedNameSpecifier *NNS, const IdentifierInfo *Name, 1633 QualType CanonType) 1634 : Type(Typename, CanonType, true), NNS(NNS), Name(Name) { 1635 assert(NNS->isDependent() && 1636 "TypenameType requires a dependent nested-name-specifier"); 1637 } 1638 1639 TypenameType(NestedNameSpecifier *NNS, const TemplateSpecializationType *Ty, 1640 QualType CanonType) 1641 : Type(Typename, CanonType, true), NNS(NNS), Name(Ty) { 1642 assert(NNS->isDependent() && 1643 "TypenameType requires a dependent nested-name-specifier"); 1644 } 1645 1646 friend class ASTContext; // ASTContext creates these 1647 1648public: 1649 /// \brief Retrieve the qualification on this type. 1650 NestedNameSpecifier *getQualifier() const { return NNS; } 1651 1652 /// \brief Retrieve the type named by the typename specifier as an 1653 /// identifier. 1654 /// 1655 /// This routine will return a non-NULL identifier pointer when the 1656 /// form of the original typename was terminated by an identifier, 1657 /// e.g., "typename T::type". 1658 const IdentifierInfo *getIdentifier() const { 1659 return Name.dyn_cast<const IdentifierInfo *>(); 1660 } 1661 1662 /// \brief Retrieve the type named by the typename specifier as a 1663 /// type specialization. 1664 const TemplateSpecializationType *getTemplateId() const { 1665 return Name.dyn_cast<const TemplateSpecializationType *>(); 1666 } 1667 1668 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 1669 1670 void Profile(llvm::FoldingSetNodeID &ID) { 1671 Profile(ID, NNS, Name); 1672 } 1673 1674 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 1675 NameType Name) { 1676 ID.AddPointer(NNS); 1677 ID.AddPointer(Name.getOpaqueValue()); 1678 } 1679 1680 static bool classof(const Type *T) { 1681 return T->getTypeClass() == Typename; 1682 } 1683 static bool classof(const TypenameType *T) { return true; } 1684}; 1685 1686/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 1687/// object oriented design. They basically correspond to C++ classes. There 1688/// are two kinds of interface types, normal interfaces like "NSString" and 1689/// qualified interfaces, which are qualified with a protocol list like 1690/// "NSString<NSCopyable, NSAmazing>". Qualified interface types are instances 1691/// of ObjCQualifiedInterfaceType, which is a subclass of ObjCInterfaceType. 1692class ObjCInterfaceType : public Type { 1693 ObjCInterfaceDecl *Decl; 1694protected: 1695 ObjCInterfaceType(TypeClass tc, ObjCInterfaceDecl *D) : 1696 Type(tc, QualType(), /*Dependent=*/false), Decl(D) { } 1697 friend class ASTContext; // ASTContext creates these. 1698public: 1699 1700 ObjCInterfaceDecl *getDecl() const { return Decl; } 1701 1702 /// qual_iterator and friends: this provides access to the (potentially empty) 1703 /// list of protocols qualifying this interface. If this is an instance of 1704 /// ObjCQualifiedInterfaceType it returns the list, otherwise it returns an 1705 /// empty list if there are no qualifying protocols. 1706 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 1707 inline qual_iterator qual_begin() const; 1708 inline qual_iterator qual_end() const; 1709 bool qual_empty() const { return getTypeClass() != ObjCQualifiedInterface; } 1710 1711 /// getNumProtocols - Return the number of qualifying protocols in this 1712 /// interface type, or 0 if there are none. 1713 inline unsigned getNumProtocols() const; 1714 1715 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 1716 static bool classof(const Type *T) { 1717 return T->getTypeClass() == ObjCInterface || 1718 T->getTypeClass() == ObjCQualifiedInterface; 1719 } 1720 static bool classof(const ObjCInterfaceType *) { return true; } 1721}; 1722 1723/// ObjCQualifiedInterfaceType - This class represents interface types 1724/// conforming to a list of protocols, such as INTF<Proto1, Proto2, Proto1>. 1725/// 1726/// Duplicate protocols are removed and protocol list is canonicalized to be in 1727/// alphabetical order. 1728class ObjCQualifiedInterfaceType : public ObjCInterfaceType, 1729 public llvm::FoldingSetNode { 1730 1731 // List of protocols for this protocol conforming object type 1732 // List is sorted on protocol name. No protocol is enterred more than once. 1733 llvm::SmallVector<ObjCProtocolDecl*, 4> Protocols; 1734 1735 ObjCQualifiedInterfaceType(ObjCInterfaceDecl *D, 1736 ObjCProtocolDecl **Protos, unsigned NumP) : 1737 ObjCInterfaceType(ObjCQualifiedInterface, D), 1738 Protocols(Protos, Protos+NumP) { } 1739 friend class ASTContext; // ASTContext creates these. 1740public: 1741 1742 unsigned getNumProtocols() const { 1743 return Protocols.size(); 1744 } 1745 1746 qual_iterator qual_begin() const { return Protocols.begin(); } 1747 qual_iterator qual_end() const { return Protocols.end(); } 1748 1749 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 1750 1751 void Profile(llvm::FoldingSetNodeID &ID); 1752 static void Profile(llvm::FoldingSetNodeID &ID, 1753 const ObjCInterfaceDecl *Decl, 1754 ObjCProtocolDecl **protocols, unsigned NumProtocols); 1755 1756 static bool classof(const Type *T) { 1757 return T->getTypeClass() == ObjCQualifiedInterface; 1758 } 1759 static bool classof(const ObjCQualifiedInterfaceType *) { return true; } 1760}; 1761 1762inline ObjCInterfaceType::qual_iterator ObjCInterfaceType::qual_begin() const { 1763 if (const ObjCQualifiedInterfaceType *QIT = 1764 dyn_cast<ObjCQualifiedInterfaceType>(this)) 1765 return QIT->qual_begin(); 1766 return 0; 1767} 1768inline ObjCInterfaceType::qual_iterator ObjCInterfaceType::qual_end() const { 1769 if (const ObjCQualifiedInterfaceType *QIT = 1770 dyn_cast<ObjCQualifiedInterfaceType>(this)) 1771 return QIT->qual_end(); 1772 return 0; 1773} 1774 1775/// getNumProtocols - Return the number of qualifying protocols in this 1776/// interface type, or 0 if there are none. 1777inline unsigned ObjCInterfaceType::getNumProtocols() const { 1778 if (const ObjCQualifiedInterfaceType *QIT = 1779 dyn_cast<ObjCQualifiedInterfaceType>(this)) 1780 return QIT->getNumProtocols(); 1781 return 0; 1782} 1783 1784/// ObjCQualifiedIdType - to represent id<protocol-list>. 1785/// 1786/// Duplicate protocols are removed and protocol list is canonicalized to be in 1787/// alphabetical order. 1788class ObjCQualifiedIdType : public Type, 1789 public llvm::FoldingSetNode { 1790 // List of protocols for this protocol conforming 'id' type 1791 // List is sorted on protocol name. No protocol is enterred more than once. 1792 llvm::SmallVector<ObjCProtocolDecl*, 8> Protocols; 1793 1794 ObjCQualifiedIdType(ObjCProtocolDecl **Protos, unsigned NumP) 1795 : Type(ObjCQualifiedId, QualType()/*these are always canonical*/, 1796 /*Dependent=*/false), 1797 Protocols(Protos, Protos+NumP) { } 1798 friend class ASTContext; // ASTContext creates these. 1799public: 1800 1801 unsigned getNumProtocols() const { 1802 return Protocols.size(); 1803 } 1804 1805 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 1806 qual_iterator qual_begin() const { return Protocols.begin(); } 1807 qual_iterator qual_end() const { return Protocols.end(); } 1808 1809 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 1810 1811 void Profile(llvm::FoldingSetNodeID &ID); 1812 static void Profile(llvm::FoldingSetNodeID &ID, 1813 ObjCProtocolDecl **protocols, unsigned NumProtocols); 1814 1815 static bool classof(const Type *T) { 1816 return T->getTypeClass() == ObjCQualifiedId; 1817 } 1818 static bool classof(const ObjCQualifiedIdType *) { return true; } 1819 1820}; 1821 1822// Inline function definitions. 1823 1824/// getUnqualifiedType - Return the type without any qualifiers. 1825inline QualType QualType::getUnqualifiedType() const { 1826 Type *TP = getTypePtr(); 1827 if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(TP)) 1828 TP = EXTQT->getBaseType(); 1829 return QualType(TP, 0); 1830} 1831 1832/// getAddressSpace - Return the address space of this type. 1833inline unsigned QualType::getAddressSpace() const { 1834 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 1835 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 1836 return AT->getElementType().getAddressSpace(); 1837 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 1838 return RT->getAddressSpace(); 1839 if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(CT)) 1840 return EXTQT->getAddressSpace(); 1841 return 0; 1842} 1843 1844/// getObjCGCAttr - Return the gc attribute of this type. 1845inline QualType::GCAttrTypes QualType::getObjCGCAttr() const { 1846 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 1847 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 1848 return AT->getElementType().getObjCGCAttr(); 1849 if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(CT)) 1850 return EXTQT->getObjCGCAttr(); 1851 if (const PointerType *PT = CT->getAsPointerType()) 1852 return PT->getPointeeType().getObjCGCAttr(); 1853 return GCNone; 1854} 1855 1856/// isMoreQualifiedThan - Determine whether this type is more 1857/// qualified than the Other type. For example, "const volatile int" 1858/// is more qualified than "const int", "volatile int", and 1859/// "int". However, it is not more qualified than "const volatile 1860/// int". 1861inline bool QualType::isMoreQualifiedThan(QualType Other) const { 1862 unsigned MyQuals = this->getCVRQualifiers(); 1863 unsigned OtherQuals = Other.getCVRQualifiers(); 1864 if (getAddressSpace() != Other.getAddressSpace()) 1865 return false; 1866 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 1867} 1868 1869/// isAtLeastAsQualifiedAs - Determine whether this type is at last 1870/// as qualified as the Other type. For example, "const volatile 1871/// int" is at least as qualified as "const int", "volatile int", 1872/// "int", and "const volatile int". 1873inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 1874 unsigned MyQuals = this->getCVRQualifiers(); 1875 unsigned OtherQuals = Other.getCVRQualifiers(); 1876 if (getAddressSpace() != Other.getAddressSpace()) 1877 return false; 1878 return (MyQuals | OtherQuals) == MyQuals; 1879} 1880 1881/// getNonReferenceType - If Type is a reference type (e.g., const 1882/// int&), returns the type that the reference refers to ("const 1883/// int"). Otherwise, returns the type itself. This routine is used 1884/// throughout Sema to implement C++ 5p6: 1885/// 1886/// If an expression initially has the type "reference to T" (8.3.2, 1887/// 8.5.3), the type is adjusted to "T" prior to any further 1888/// analysis, the expression designates the object or function 1889/// denoted by the reference, and the expression is an lvalue. 1890inline QualType QualType::getNonReferenceType() const { 1891 if (const ReferenceType *RefType = (*this)->getAsReferenceType()) 1892 return RefType->getPointeeType(); 1893 else 1894 return *this; 1895} 1896 1897inline const TypedefType* Type::getAsTypedefType() const { 1898 return dyn_cast<TypedefType>(this); 1899} 1900inline const ObjCInterfaceType *Type::getAsPointerToObjCInterfaceType() const { 1901 if (const PointerType *PT = getAsPointerType()) 1902 return PT->getPointeeType()->getAsObjCInterfaceType(); 1903 return 0; 1904} 1905 1906// NOTE: All of these methods use "getUnqualifiedType" to strip off address 1907// space qualifiers if present. 1908inline bool Type::isFunctionType() const { 1909 return isa<FunctionType>(CanonicalType.getUnqualifiedType()); 1910} 1911inline bool Type::isPointerType() const { 1912 return isa<PointerType>(CanonicalType.getUnqualifiedType()); 1913} 1914inline bool Type::isBlockPointerType() const { 1915 return isa<BlockPointerType>(CanonicalType.getUnqualifiedType()); 1916} 1917inline bool Type::isReferenceType() const { 1918 return isa<ReferenceType>(CanonicalType.getUnqualifiedType()); 1919} 1920inline bool Type::isLValueReferenceType() const { 1921 return isa<LValueReferenceType>(CanonicalType.getUnqualifiedType()); 1922} 1923inline bool Type::isRValueReferenceType() const { 1924 return isa<RValueReferenceType>(CanonicalType.getUnqualifiedType()); 1925} 1926inline bool Type::isFunctionPointerType() const { 1927 if (const PointerType* T = getAsPointerType()) 1928 return T->getPointeeType()->isFunctionType(); 1929 else 1930 return false; 1931} 1932inline bool Type::isMemberPointerType() const { 1933 return isa<MemberPointerType>(CanonicalType.getUnqualifiedType()); 1934} 1935inline bool Type::isMemberFunctionPointerType() const { 1936 if (const MemberPointerType* T = getAsMemberPointerType()) 1937 return T->getPointeeType()->isFunctionType(); 1938 else 1939 return false; 1940} 1941inline bool Type::isArrayType() const { 1942 return isa<ArrayType>(CanonicalType.getUnqualifiedType()); 1943} 1944inline bool Type::isConstantArrayType() const { 1945 return isa<ConstantArrayType>(CanonicalType.getUnqualifiedType()); 1946} 1947inline bool Type::isIncompleteArrayType() const { 1948 return isa<IncompleteArrayType>(CanonicalType.getUnqualifiedType()); 1949} 1950inline bool Type::isVariableArrayType() const { 1951 return isa<VariableArrayType>(CanonicalType.getUnqualifiedType()); 1952} 1953inline bool Type::isDependentSizedArrayType() const { 1954 return isa<DependentSizedArrayType>(CanonicalType.getUnqualifiedType()); 1955} 1956inline bool Type::isRecordType() const { 1957 return isa<RecordType>(CanonicalType.getUnqualifiedType()); 1958} 1959inline bool Type::isAnyComplexType() const { 1960 return isa<ComplexType>(CanonicalType.getUnqualifiedType()); 1961} 1962inline bool Type::isVectorType() const { 1963 return isa<VectorType>(CanonicalType.getUnqualifiedType()); 1964} 1965inline bool Type::isExtVectorType() const { 1966 return isa<ExtVectorType>(CanonicalType.getUnqualifiedType()); 1967} 1968inline bool Type::isObjCInterfaceType() const { 1969 return isa<ObjCInterfaceType>(CanonicalType.getUnqualifiedType()); 1970} 1971inline bool Type::isObjCQualifiedInterfaceType() const { 1972 return isa<ObjCQualifiedInterfaceType>(CanonicalType.getUnqualifiedType()); 1973} 1974inline bool Type::isObjCQualifiedIdType() const { 1975 return isa<ObjCQualifiedIdType>(CanonicalType.getUnqualifiedType()); 1976} 1977inline bool Type::isTemplateTypeParmType() const { 1978 return isa<TemplateTypeParmType>(CanonicalType.getUnqualifiedType()); 1979} 1980 1981inline bool Type::isSpecificBuiltinType(unsigned K) const { 1982 if (const BuiltinType *BT = getAsBuiltinType()) 1983 if (BT->getKind() == (BuiltinType::Kind) K) 1984 return true; 1985 return false; 1986} 1987 1988/// \brief Determines whether this is a type for which one can define 1989/// an overloaded operator. 1990inline bool Type::isOverloadableType() const { 1991 return isDependentType() || isRecordType() || isEnumeralType(); 1992} 1993 1994inline bool Type::hasPointerRepresentation() const { 1995 return (isPointerType() || isReferenceType() || isBlockPointerType() || 1996 isObjCInterfaceType() || isObjCQualifiedIdType() || 1997 isObjCQualifiedInterfaceType() || isNullPtrType()); 1998} 1999 2000inline bool Type::hasObjCPointerRepresentation() const { 2001 return (isObjCInterfaceType() || isObjCQualifiedIdType() || 2002 isObjCQualifiedInterfaceType()); 2003} 2004 2005/// Insertion operator for diagnostics. This allows sending QualType's into a 2006/// diagnostic with <<. 2007inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 2008 QualType T) { 2009 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 2010 Diagnostic::ak_qualtype); 2011 return DB; 2012} 2013 2014} // end namespace clang 2015 2016#endif 2017