Type.h revision 11269048f03d91e991150c429dc874ae3999acb0
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/// VectorType - GCC generic vector type. This type is created using 996/// __attribute__((vector_size(n)), where "n" specifies the vector size in 997/// bytes. Since the constructor takes the number of vector elements, the 998/// client is responsible for converting the size into the number of elements. 999class VectorType : public Type, public llvm::FoldingSetNode { 1000protected: 1001 /// ElementType - The element type of the vector. 1002 QualType ElementType; 1003 1004 /// NumElements - The number of elements in the vector. 1005 unsigned NumElements; 1006 1007 VectorType(QualType vecType, unsigned nElements, QualType canonType) : 1008 Type(Vector, canonType, vecType->isDependentType()), 1009 ElementType(vecType), NumElements(nElements) {} 1010 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 1011 QualType canonType) 1012 : Type(tc, canonType, vecType->isDependentType()), ElementType(vecType), 1013 NumElements(nElements) {} 1014 friend class ASTContext; // ASTContext creates these. 1015public: 1016 1017 QualType getElementType() const { return ElementType; } 1018 unsigned getNumElements() const { return NumElements; } 1019 1020 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 1021 1022 void Profile(llvm::FoldingSetNodeID &ID) { 1023 Profile(ID, getElementType(), getNumElements(), getTypeClass()); 1024 } 1025 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 1026 unsigned NumElements, TypeClass TypeClass) { 1027 ID.AddPointer(ElementType.getAsOpaquePtr()); 1028 ID.AddInteger(NumElements); 1029 ID.AddInteger(TypeClass); 1030 } 1031 static bool classof(const Type *T) { 1032 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 1033 } 1034 static bool classof(const VectorType *) { return true; } 1035}; 1036 1037/// ExtVectorType - Extended vector type. This type is created using 1038/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 1039/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 1040/// class enables syntactic extensions, like Vector Components for accessing 1041/// points, colors, and textures (modeled after OpenGL Shading Language). 1042class ExtVectorType : public VectorType { 1043 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 1044 VectorType(ExtVector, vecType, nElements, canonType) {} 1045 friend class ASTContext; // ASTContext creates these. 1046public: 1047 static int getPointAccessorIdx(char c) { 1048 switch (c) { 1049 default: return -1; 1050 case 'x': return 0; 1051 case 'y': return 1; 1052 case 'z': return 2; 1053 case 'w': return 3; 1054 } 1055 } 1056 static int getNumericAccessorIdx(char c) { 1057 switch (c) { 1058 default: return -1; 1059 case '0': return 0; 1060 case '1': return 1; 1061 case '2': return 2; 1062 case '3': return 3; 1063 case '4': return 4; 1064 case '5': return 5; 1065 case '6': return 6; 1066 case '7': return 7; 1067 case '8': return 8; 1068 case '9': return 9; 1069 case 'a': return 10; 1070 case 'b': return 11; 1071 case 'c': return 12; 1072 case 'd': return 13; 1073 case 'e': return 14; 1074 case 'f': return 15; 1075 } 1076 } 1077 1078 static int getAccessorIdx(char c) { 1079 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 1080 return getNumericAccessorIdx(c); 1081 } 1082 1083 bool isAccessorWithinNumElements(char c) const { 1084 if (int idx = getAccessorIdx(c)+1) 1085 return unsigned(idx-1) < NumElements; 1086 return false; 1087 } 1088 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 1089 1090 static bool classof(const Type *T) { 1091 return T->getTypeClass() == ExtVector; 1092 } 1093 static bool classof(const ExtVectorType *) { return true; } 1094}; 1095 1096/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 1097/// class of FunctionNoProtoType and FunctionProtoType. 1098/// 1099class FunctionType : public Type { 1100 /// SubClassData - This field is owned by the subclass, put here to pack 1101 /// tightly with the ivars in Type. 1102 bool SubClassData : 1; 1103 1104 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1105 /// other bitfields. 1106 /// The qualifiers are part of FunctionProtoType because... 1107 /// 1108 /// C++ 8.3.5p4: The return type, the parameter type list and the 1109 /// cv-qualifier-seq, [...], are part of the function type. 1110 /// 1111 unsigned TypeQuals : 3; 1112 1113 // The type returned by the function. 1114 QualType ResultType; 1115protected: 1116 FunctionType(TypeClass tc, QualType res, bool SubclassInfo, 1117 unsigned typeQuals, QualType Canonical, bool Dependent) 1118 : Type(tc, Canonical, Dependent), 1119 SubClassData(SubclassInfo), TypeQuals(typeQuals), ResultType(res) {} 1120 bool getSubClassData() const { return SubClassData; } 1121 unsigned getTypeQuals() const { return TypeQuals; } 1122public: 1123 1124 QualType getResultType() const { return ResultType; } 1125 1126 1127 static bool classof(const Type *T) { 1128 return T->getTypeClass() == FunctionNoProto || 1129 T->getTypeClass() == FunctionProto; 1130 } 1131 static bool classof(const FunctionType *) { return true; } 1132}; 1133 1134/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 1135/// no information available about its arguments. 1136class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 1137 FunctionNoProtoType(QualType Result, QualType Canonical) 1138 : FunctionType(FunctionNoProto, Result, false, 0, Canonical, 1139 /*Dependent=*/false) {} 1140 friend class ASTContext; // ASTContext creates these. 1141public: 1142 // No additional state past what FunctionType provides. 1143 1144 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 1145 1146 void Profile(llvm::FoldingSetNodeID &ID) { 1147 Profile(ID, getResultType()); 1148 } 1149 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType) { 1150 ID.AddPointer(ResultType.getAsOpaquePtr()); 1151 } 1152 1153 static bool classof(const Type *T) { 1154 return T->getTypeClass() == FunctionNoProto; 1155 } 1156 static bool classof(const FunctionNoProtoType *) { return true; } 1157}; 1158 1159/// FunctionProtoType - Represents a prototype with argument type info, e.g. 1160/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 1161/// arguments, not as having a single void argument. Such a type can have an 1162/// exception specification, but this specification is not part of the canonical 1163/// type. 1164class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 1165 /// hasAnyDependentType - Determine whether there are any dependent 1166 /// types within the arguments passed in. 1167 static bool hasAnyDependentType(const QualType *ArgArray, unsigned numArgs) { 1168 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 1169 if (ArgArray[Idx]->isDependentType()) 1170 return true; 1171 1172 return false; 1173 } 1174 1175 FunctionProtoType(QualType Result, const QualType *ArgArray, unsigned numArgs, 1176 bool isVariadic, unsigned typeQuals, bool hasExs, 1177 bool hasAnyExs, const QualType *ExArray, 1178 unsigned numExs, QualType Canonical) 1179 : FunctionType(FunctionProto, Result, isVariadic, typeQuals, Canonical, 1180 (Result->isDependentType() || 1181 hasAnyDependentType(ArgArray, numArgs))), 1182 NumArgs(numArgs), NumExceptions(numExs), HasExceptionSpec(hasExs), 1183 AnyExceptionSpec(hasAnyExs) { 1184 // Fill in the trailing argument array. 1185 QualType *ArgInfo = reinterpret_cast<QualType*>(this+1); 1186 for (unsigned i = 0; i != numArgs; ++i) 1187 ArgInfo[i] = ArgArray[i]; 1188 // Fill in the exception array. 1189 QualType *Ex = ArgInfo + numArgs; 1190 for (unsigned i = 0; i != numExs; ++i) 1191 Ex[i] = ExArray[i]; 1192 } 1193 1194 /// NumArgs - The number of arguments this function has, not counting '...'. 1195 unsigned NumArgs : 20; 1196 1197 /// NumExceptions - The number of types in the exception spec, if any. 1198 unsigned NumExceptions : 10; 1199 1200 /// HasExceptionSpec - Whether this function has an exception spec at all. 1201 bool HasExceptionSpec : 1; 1202 1203 /// AnyExceptionSpec - Whether this function has a throw(...) spec. 1204 bool AnyExceptionSpec : 1; 1205 1206 /// ArgInfo - There is an variable size array after the class in memory that 1207 /// holds the argument types. 1208 1209 /// Exceptions - There is another variable size array after ArgInfo that 1210 /// holds the exception types. 1211 1212 friend class ASTContext; // ASTContext creates these. 1213 1214public: 1215 unsigned getNumArgs() const { return NumArgs; } 1216 QualType getArgType(unsigned i) const { 1217 assert(i < NumArgs && "Invalid argument number!"); 1218 return arg_type_begin()[i]; 1219 } 1220 1221 bool hasExceptionSpec() const { return HasExceptionSpec; } 1222 bool hasAnyExceptionSpec() const { return AnyExceptionSpec; } 1223 unsigned getNumExceptions() const { return NumExceptions; } 1224 QualType getExceptionType(unsigned i) const { 1225 assert(i < NumExceptions && "Invalid exception number!"); 1226 return exception_begin()[i]; 1227 } 1228 bool hasEmptyExceptionSpec() const { 1229 return hasExceptionSpec() && getNumExceptions() == 0; 1230 } 1231 1232 bool isVariadic() const { return getSubClassData(); } 1233 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 1234 1235 typedef const QualType *arg_type_iterator; 1236 arg_type_iterator arg_type_begin() const { 1237 return reinterpret_cast<const QualType *>(this+1); 1238 } 1239 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 1240 1241 typedef const QualType *exception_iterator; 1242 exception_iterator exception_begin() const { 1243 // exceptions begin where arguments end 1244 return arg_type_end(); 1245 } 1246 exception_iterator exception_end() const { 1247 return exception_begin() + NumExceptions; 1248 } 1249 1250 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 1251 1252 static bool classof(const Type *T) { 1253 return T->getTypeClass() == FunctionProto; 1254 } 1255 static bool classof(const FunctionProtoType *) { return true; } 1256 1257 void Profile(llvm::FoldingSetNodeID &ID); 1258 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 1259 arg_type_iterator ArgTys, unsigned NumArgs, 1260 bool isVariadic, unsigned TypeQuals, 1261 bool hasExceptionSpec, bool anyExceptionSpec, 1262 unsigned NumExceptions, exception_iterator Exs); 1263}; 1264 1265 1266class TypedefType : public Type { 1267 TypedefDecl *Decl; 1268protected: 1269 TypedefType(TypeClass tc, TypedefDecl *D, QualType can) 1270 : Type(tc, can, can->isDependentType()), Decl(D) { 1271 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1272 } 1273 friend class ASTContext; // ASTContext creates these. 1274public: 1275 1276 TypedefDecl *getDecl() const { return Decl; } 1277 1278 /// LookThroughTypedefs - Return the ultimate type this typedef corresponds to 1279 /// potentially looking through *all* consecutive typedefs. This returns the 1280 /// sum of the type qualifiers, so if you have: 1281 /// typedef const int A; 1282 /// typedef volatile A B; 1283 /// looking through the typedefs for B will give you "const volatile A". 1284 QualType LookThroughTypedefs() const; 1285 1286 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 1287 1288 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 1289 static bool classof(const TypedefType *) { return true; } 1290}; 1291 1292/// TypeOfExprType (GCC extension). 1293class TypeOfExprType : public Type { 1294 Expr *TOExpr; 1295 TypeOfExprType(Expr *E, QualType can); 1296 friend class ASTContext; // ASTContext creates these. 1297public: 1298 Expr *getUnderlyingExpr() const { return TOExpr; } 1299 1300 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 1301 1302 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 1303 static bool classof(const TypeOfExprType *) { return true; } 1304}; 1305 1306/// TypeOfType (GCC extension). 1307class TypeOfType : public Type { 1308 QualType TOType; 1309 TypeOfType(QualType T, QualType can) 1310 : Type(TypeOf, can, T->isDependentType()), TOType(T) { 1311 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1312 } 1313 friend class ASTContext; // ASTContext creates these. 1314public: 1315 QualType getUnderlyingType() const { return TOType; } 1316 1317 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 1318 1319 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 1320 static bool classof(const TypeOfType *) { return true; } 1321}; 1322 1323class TagType : public Type { 1324 /// Stores the TagDecl associated with this type. The decl will 1325 /// point to the TagDecl that actually defines the entity (or is a 1326 /// definition in progress), if there is such a definition. The 1327 /// single-bit value will be non-zero when this tag is in the 1328 /// process of being defined. 1329 mutable llvm::PointerIntPair<TagDecl *, 1> decl; 1330 friend class ASTContext; 1331 friend class TagDecl; 1332 1333protected: 1334 TagType(TypeClass TC, TagDecl *D, QualType can); 1335 1336public: 1337 TagDecl *getDecl() const { return decl.getPointer(); } 1338 1339 /// @brief Determines whether this type is in the process of being 1340 /// defined. 1341 bool isBeingDefined() const { return decl.getInt(); } 1342 void setBeingDefined(bool Def) { decl.setInt(Def? 1 : 0); } 1343 1344 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 1345 1346 static bool classof(const Type *T) { 1347 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 1348 } 1349 static bool classof(const TagType *) { return true; } 1350 static bool classof(const RecordType *) { return true; } 1351 static bool classof(const EnumType *) { return true; } 1352}; 1353 1354/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 1355/// to detect TagType objects of structs/unions/classes. 1356class RecordType : public TagType { 1357protected: 1358 explicit RecordType(RecordDecl *D) 1359 : TagType(Record, reinterpret_cast<TagDecl*>(D), QualType()) { } 1360 explicit RecordType(TypeClass TC, RecordDecl *D) 1361 : TagType(TC, reinterpret_cast<TagDecl*>(D), QualType()) { } 1362 friend class ASTContext; // ASTContext creates these. 1363public: 1364 1365 RecordDecl *getDecl() const { 1366 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 1367 } 1368 1369 // FIXME: This predicate is a helper to QualType/Type. It needs to 1370 // recursively check all fields for const-ness. If any field is declared 1371 // const, it needs to return false. 1372 bool hasConstFields() const { return false; } 1373 1374 // FIXME: RecordType needs to check when it is created that all fields are in 1375 // the same address space, and return that. 1376 unsigned getAddressSpace() const { return 0; } 1377 1378 static bool classof(const TagType *T); 1379 static bool classof(const Type *T) { 1380 return isa<TagType>(T) && classof(cast<TagType>(T)); 1381 } 1382 static bool classof(const RecordType *) { return true; } 1383}; 1384 1385/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 1386/// to detect TagType objects of enums. 1387class EnumType : public TagType { 1388 explicit EnumType(EnumDecl *D) 1389 : TagType(Enum, reinterpret_cast<TagDecl*>(D), QualType()) { } 1390 friend class ASTContext; // ASTContext creates these. 1391public: 1392 1393 EnumDecl *getDecl() const { 1394 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 1395 } 1396 1397 static bool classof(const TagType *T); 1398 static bool classof(const Type *T) { 1399 return isa<TagType>(T) && classof(cast<TagType>(T)); 1400 } 1401 static bool classof(const EnumType *) { return true; } 1402}; 1403 1404class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 1405 unsigned Depth : 16; 1406 unsigned Index : 16; 1407 IdentifierInfo *Name; 1408 1409 TemplateTypeParmType(unsigned D, unsigned I, IdentifierInfo *N, 1410 QualType Canon) 1411 : Type(TemplateTypeParm, Canon, /*Dependent=*/true), 1412 Depth(D), Index(I), Name(N) { } 1413 1414 TemplateTypeParmType(unsigned D, unsigned I) 1415 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true), 1416 Depth(D), Index(I), Name(0) { } 1417 1418 friend class ASTContext; // ASTContext creates these 1419 1420public: 1421 unsigned getDepth() const { return Depth; } 1422 unsigned getIndex() const { return Index; } 1423 IdentifierInfo *getName() const { return Name; } 1424 1425 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 1426 1427 void Profile(llvm::FoldingSetNodeID &ID) { 1428 Profile(ID, Depth, Index, Name); 1429 } 1430 1431 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 1432 unsigned Index, IdentifierInfo *Name) { 1433 ID.AddInteger(Depth); 1434 ID.AddInteger(Index); 1435 ID.AddPointer(Name); 1436 } 1437 1438 static bool classof(const Type *T) { 1439 return T->getTypeClass() == TemplateTypeParm; 1440 } 1441 static bool classof(const TemplateTypeParmType *T) { return true; } 1442}; 1443 1444/// \brief Represents the type of a template specialization as written 1445/// in the source code. 1446/// 1447/// Template specialization types represent the syntactic form of a 1448/// template-id that refers to a type, e.g., @c vector<int>. Some 1449/// template specialization types are syntactic sugar, whose canonical 1450/// type will point to some other type node that represents the 1451/// instantiation or class template specialization. For example, a 1452/// class template specialization type of @c vector<int> will refer to 1453/// a tag type for the instantiation 1454/// @c std::vector<int, std::allocator<int>>. 1455/// 1456/// Other template specialization types, for which the template name 1457/// is dependent, may be canonical types. These types are always 1458/// dependent. 1459class TemplateSpecializationType 1460 : public Type, public llvm::FoldingSetNode { 1461 1462 /// \brief The name of the template being specialized. 1463 TemplateName Template; 1464 1465 /// \brief - The number of template arguments named in this class 1466 /// template specialization. 1467 unsigned NumArgs; 1468 1469 TemplateSpecializationType(TemplateName T, 1470 const TemplateArgument *Args, 1471 unsigned NumArgs, QualType Canon); 1472 1473 virtual void Destroy(ASTContext& C); 1474 1475 friend class ASTContext; // ASTContext creates these 1476 1477public: 1478 /// \brief Determine whether any of the given template arguments are 1479 /// dependent. 1480 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 1481 unsigned NumArgs); 1482 1483 /// \brief Print a template argument list, including the '<' and '>' 1484 /// enclosing the template arguments. 1485 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 1486 unsigned NumArgs, 1487 const PrintingPolicy &Policy); 1488 1489 typedef const TemplateArgument * iterator; 1490 1491 iterator begin() const { return getArgs(); } 1492 iterator end() const; 1493 1494 /// \brief Retrieve the name of the template that we are specializing. 1495 TemplateName getTemplateName() const { return Template; } 1496 1497 /// \brief Retrieve the template arguments. 1498 const TemplateArgument *getArgs() const { 1499 return reinterpret_cast<const TemplateArgument *>(this + 1); 1500 } 1501 1502 /// \brief Retrieve the number of template arguments. 1503 unsigned getNumArgs() const { return NumArgs; } 1504 1505 /// \brief Retrieve a specific template argument as a type. 1506 /// \precondition @c isArgType(Arg) 1507 const TemplateArgument &getArg(unsigned Idx) const; 1508 1509 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 1510 1511 void Profile(llvm::FoldingSetNodeID &ID) { 1512 Profile(ID, Template, getArgs(), NumArgs); 1513 } 1514 1515 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 1516 const TemplateArgument *Args, unsigned NumArgs); 1517 1518 static bool classof(const Type *T) { 1519 return T->getTypeClass() == TemplateSpecialization; 1520 } 1521 static bool classof(const TemplateSpecializationType *T) { return true; } 1522}; 1523 1524/// \brief Represents a type that was referred to via a qualified 1525/// name, e.g., N::M::type. 1526/// 1527/// This type is used to keep track of a type name as written in the 1528/// source code, including any nested-name-specifiers. The type itself 1529/// is always "sugar", used to express what was written in the source 1530/// code but containing no additional semantic information. 1531class QualifiedNameType : public Type, public llvm::FoldingSetNode { 1532 /// \brief The nested name specifier containing the qualifier. 1533 NestedNameSpecifier *NNS; 1534 1535 /// \brief The type that this qualified name refers to. 1536 QualType NamedType; 1537 1538 QualifiedNameType(NestedNameSpecifier *NNS, QualType NamedType, 1539 QualType CanonType) 1540 : Type(QualifiedName, CanonType, NamedType->isDependentType()), 1541 NNS(NNS), NamedType(NamedType) { } 1542 1543 friend class ASTContext; // ASTContext creates these 1544 1545public: 1546 /// \brief Retrieve the qualification on this type. 1547 NestedNameSpecifier *getQualifier() const { return NNS; } 1548 1549 /// \brief Retrieve the type named by the qualified-id. 1550 QualType getNamedType() const { return NamedType; } 1551 1552 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 1553 1554 void Profile(llvm::FoldingSetNodeID &ID) { 1555 Profile(ID, NNS, NamedType); 1556 } 1557 1558 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 1559 QualType NamedType) { 1560 ID.AddPointer(NNS); 1561 NamedType.Profile(ID); 1562 } 1563 1564 static bool classof(const Type *T) { 1565 return T->getTypeClass() == QualifiedName; 1566 } 1567 static bool classof(const QualifiedNameType *T) { return true; } 1568}; 1569 1570/// \brief Represents a 'typename' specifier that names a type within 1571/// a dependent type, e.g., "typename T::type". 1572/// 1573/// TypenameType has a very similar structure to QualifiedNameType, 1574/// which also involves a nested-name-specifier following by a type, 1575/// and (FIXME!) both can even be prefixed by the 'typename' 1576/// keyword. However, the two types serve very different roles: 1577/// QualifiedNameType is a non-semantic type that serves only as sugar 1578/// to show how a particular type was written in the source 1579/// code. TypenameType, on the other hand, only occurs when the 1580/// nested-name-specifier is dependent, such that we cannot resolve 1581/// the actual type until after instantiation. 1582class TypenameType : public Type, public llvm::FoldingSetNode { 1583 /// \brief The nested name specifier containing the qualifier. 1584 NestedNameSpecifier *NNS; 1585 1586 typedef llvm::PointerUnion<const IdentifierInfo *, 1587 const TemplateSpecializationType *> NameType; 1588 1589 /// \brief The type that this typename specifier refers to. 1590 NameType Name; 1591 1592 TypenameType(NestedNameSpecifier *NNS, const IdentifierInfo *Name, 1593 QualType CanonType) 1594 : Type(Typename, CanonType, true), NNS(NNS), Name(Name) { 1595 assert(NNS->isDependent() && 1596 "TypenameType requires a dependent nested-name-specifier"); 1597 } 1598 1599 TypenameType(NestedNameSpecifier *NNS, const TemplateSpecializationType *Ty, 1600 QualType CanonType) 1601 : Type(Typename, CanonType, true), NNS(NNS), Name(Ty) { 1602 assert(NNS->isDependent() && 1603 "TypenameType requires a dependent nested-name-specifier"); 1604 } 1605 1606 friend class ASTContext; // ASTContext creates these 1607 1608public: 1609 /// \brief Retrieve the qualification on this type. 1610 NestedNameSpecifier *getQualifier() const { return NNS; } 1611 1612 /// \brief Retrieve the type named by the typename specifier as an 1613 /// identifier. 1614 /// 1615 /// This routine will return a non-NULL identifier pointer when the 1616 /// form of the original typename was terminated by an identifier, 1617 /// e.g., "typename T::type". 1618 const IdentifierInfo *getIdentifier() const { 1619 return Name.dyn_cast<const IdentifierInfo *>(); 1620 } 1621 1622 /// \brief Retrieve the type named by the typename specifier as a 1623 /// type specialization. 1624 const TemplateSpecializationType *getTemplateId() const { 1625 return Name.dyn_cast<const TemplateSpecializationType *>(); 1626 } 1627 1628 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 1629 1630 void Profile(llvm::FoldingSetNodeID &ID) { 1631 Profile(ID, NNS, Name); 1632 } 1633 1634 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 1635 NameType Name) { 1636 ID.AddPointer(NNS); 1637 ID.AddPointer(Name.getOpaqueValue()); 1638 } 1639 1640 static bool classof(const Type *T) { 1641 return T->getTypeClass() == Typename; 1642 } 1643 static bool classof(const TypenameType *T) { return true; } 1644}; 1645 1646/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 1647/// object oriented design. They basically correspond to C++ classes. There 1648/// are two kinds of interface types, normal interfaces like "NSString" and 1649/// qualified interfaces, which are qualified with a protocol list like 1650/// "NSString<NSCopyable, NSAmazing>". Qualified interface types are instances 1651/// of ObjCQualifiedInterfaceType, which is a subclass of ObjCInterfaceType. 1652class ObjCInterfaceType : public Type { 1653 ObjCInterfaceDecl *Decl; 1654protected: 1655 ObjCInterfaceType(TypeClass tc, ObjCInterfaceDecl *D) : 1656 Type(tc, QualType(), /*Dependent=*/false), Decl(D) { } 1657 friend class ASTContext; // ASTContext creates these. 1658public: 1659 1660 ObjCInterfaceDecl *getDecl() const { return Decl; } 1661 1662 /// qual_iterator and friends: this provides access to the (potentially empty) 1663 /// list of protocols qualifying this interface. If this is an instance of 1664 /// ObjCQualifiedInterfaceType it returns the list, otherwise it returns an 1665 /// empty list if there are no qualifying protocols. 1666 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 1667 inline qual_iterator qual_begin() const; 1668 inline qual_iterator qual_end() const; 1669 bool qual_empty() const { return getTypeClass() != ObjCQualifiedInterface; } 1670 1671 /// getNumProtocols - Return the number of qualifying protocols in this 1672 /// interface type, or 0 if there are none. 1673 inline unsigned getNumProtocols() const; 1674 1675 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 1676 static bool classof(const Type *T) { 1677 return T->getTypeClass() == ObjCInterface || 1678 T->getTypeClass() == ObjCQualifiedInterface; 1679 } 1680 static bool classof(const ObjCInterfaceType *) { return true; } 1681}; 1682 1683/// ObjCQualifiedInterfaceType - This class represents interface types 1684/// conforming to a list of protocols, such as INTF<Proto1, Proto2, Proto1>. 1685/// 1686/// Duplicate protocols are removed and protocol list is canonicalized to be in 1687/// alphabetical order. 1688class ObjCQualifiedInterfaceType : public ObjCInterfaceType, 1689 public llvm::FoldingSetNode { 1690 1691 // List of protocols for this protocol conforming object type 1692 // List is sorted on protocol name. No protocol is enterred more than once. 1693 llvm::SmallVector<ObjCProtocolDecl*, 4> Protocols; 1694 1695 ObjCQualifiedInterfaceType(ObjCInterfaceDecl *D, 1696 ObjCProtocolDecl **Protos, unsigned NumP) : 1697 ObjCInterfaceType(ObjCQualifiedInterface, D), 1698 Protocols(Protos, Protos+NumP) { } 1699 friend class ASTContext; // ASTContext creates these. 1700public: 1701 1702 unsigned getNumProtocols() const { 1703 return Protocols.size(); 1704 } 1705 1706 qual_iterator qual_begin() const { return Protocols.begin(); } 1707 qual_iterator qual_end() const { return Protocols.end(); } 1708 1709 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 1710 1711 void Profile(llvm::FoldingSetNodeID &ID); 1712 static void Profile(llvm::FoldingSetNodeID &ID, 1713 const ObjCInterfaceDecl *Decl, 1714 ObjCProtocolDecl **protocols, unsigned NumProtocols); 1715 1716 static bool classof(const Type *T) { 1717 return T->getTypeClass() == ObjCQualifiedInterface; 1718 } 1719 static bool classof(const ObjCQualifiedInterfaceType *) { return true; } 1720}; 1721 1722inline ObjCInterfaceType::qual_iterator ObjCInterfaceType::qual_begin() const { 1723 if (const ObjCQualifiedInterfaceType *QIT = 1724 dyn_cast<ObjCQualifiedInterfaceType>(this)) 1725 return QIT->qual_begin(); 1726 return 0; 1727} 1728inline ObjCInterfaceType::qual_iterator ObjCInterfaceType::qual_end() const { 1729 if (const ObjCQualifiedInterfaceType *QIT = 1730 dyn_cast<ObjCQualifiedInterfaceType>(this)) 1731 return QIT->qual_end(); 1732 return 0; 1733} 1734 1735/// getNumProtocols - Return the number of qualifying protocols in this 1736/// interface type, or 0 if there are none. 1737inline unsigned ObjCInterfaceType::getNumProtocols() const { 1738 if (const ObjCQualifiedInterfaceType *QIT = 1739 dyn_cast<ObjCQualifiedInterfaceType>(this)) 1740 return QIT->getNumProtocols(); 1741 return 0; 1742} 1743 1744/// ObjCQualifiedIdType - to represent id<protocol-list>. 1745/// 1746/// Duplicate protocols are removed and protocol list is canonicalized to be in 1747/// alphabetical order. 1748class ObjCQualifiedIdType : public Type, 1749 public llvm::FoldingSetNode { 1750 // List of protocols for this protocol conforming 'id' type 1751 // List is sorted on protocol name. No protocol is enterred more than once. 1752 llvm::SmallVector<ObjCProtocolDecl*, 8> Protocols; 1753 1754 ObjCQualifiedIdType(ObjCProtocolDecl **Protos, unsigned NumP) 1755 : Type(ObjCQualifiedId, QualType()/*these are always canonical*/, 1756 /*Dependent=*/false), 1757 Protocols(Protos, Protos+NumP) { } 1758 friend class ASTContext; // ASTContext creates these. 1759public: 1760 1761 unsigned getNumProtocols() const { 1762 return Protocols.size(); 1763 } 1764 1765 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 1766 qual_iterator qual_begin() const { return Protocols.begin(); } 1767 qual_iterator qual_end() const { return Protocols.end(); } 1768 1769 virtual void getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const; 1770 1771 void Profile(llvm::FoldingSetNodeID &ID); 1772 static void Profile(llvm::FoldingSetNodeID &ID, 1773 ObjCProtocolDecl **protocols, unsigned NumProtocols); 1774 1775 static bool classof(const Type *T) { 1776 return T->getTypeClass() == ObjCQualifiedId; 1777 } 1778 static bool classof(const ObjCQualifiedIdType *) { return true; } 1779 1780}; 1781 1782// Inline function definitions. 1783 1784/// getUnqualifiedType - Return the type without any qualifiers. 1785inline QualType QualType::getUnqualifiedType() const { 1786 Type *TP = getTypePtr(); 1787 if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(TP)) 1788 TP = EXTQT->getBaseType(); 1789 return QualType(TP, 0); 1790} 1791 1792/// getAddressSpace - Return the address space of this type. 1793inline unsigned QualType::getAddressSpace() const { 1794 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 1795 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 1796 return AT->getElementType().getAddressSpace(); 1797 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 1798 return RT->getAddressSpace(); 1799 if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(CT)) 1800 return EXTQT->getAddressSpace(); 1801 return 0; 1802} 1803 1804/// getObjCGCAttr - Return the gc attribute of this type. 1805inline QualType::GCAttrTypes QualType::getObjCGCAttr() const { 1806 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 1807 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 1808 return AT->getElementType().getObjCGCAttr(); 1809 if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(CT)) 1810 return EXTQT->getObjCGCAttr(); 1811 if (const PointerType *PT = CT->getAsPointerType()) 1812 return PT->getPointeeType().getObjCGCAttr(); 1813 return GCNone; 1814} 1815 1816/// isMoreQualifiedThan - Determine whether this type is more 1817/// qualified than the Other type. For example, "const volatile int" 1818/// is more qualified than "const int", "volatile int", and 1819/// "int". However, it is not more qualified than "const volatile 1820/// int". 1821inline bool QualType::isMoreQualifiedThan(QualType Other) const { 1822 unsigned MyQuals = this->getCVRQualifiers(); 1823 unsigned OtherQuals = Other.getCVRQualifiers(); 1824 if (getAddressSpace() != Other.getAddressSpace()) 1825 return false; 1826 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 1827} 1828 1829/// isAtLeastAsQualifiedAs - Determine whether this type is at last 1830/// as qualified as the Other type. For example, "const volatile 1831/// int" is at least as qualified as "const int", "volatile int", 1832/// "int", and "const volatile int". 1833inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 1834 unsigned MyQuals = this->getCVRQualifiers(); 1835 unsigned OtherQuals = Other.getCVRQualifiers(); 1836 if (getAddressSpace() != Other.getAddressSpace()) 1837 return false; 1838 return (MyQuals | OtherQuals) == MyQuals; 1839} 1840 1841/// getNonReferenceType - If Type is a reference type (e.g., const 1842/// int&), returns the type that the reference refers to ("const 1843/// int"). Otherwise, returns the type itself. This routine is used 1844/// throughout Sema to implement C++ 5p6: 1845/// 1846/// If an expression initially has the type "reference to T" (8.3.2, 1847/// 8.5.3), the type is adjusted to "T" prior to any further 1848/// analysis, the expression designates the object or function 1849/// denoted by the reference, and the expression is an lvalue. 1850inline QualType QualType::getNonReferenceType() const { 1851 if (const ReferenceType *RefType = (*this)->getAsReferenceType()) 1852 return RefType->getPointeeType(); 1853 else 1854 return *this; 1855} 1856 1857inline const TypedefType* Type::getAsTypedefType() const { 1858 return dyn_cast<TypedefType>(this); 1859} 1860inline const ObjCInterfaceType *Type::getAsPointerToObjCInterfaceType() const { 1861 if (const PointerType *PT = getAsPointerType()) 1862 return PT->getPointeeType()->getAsObjCInterfaceType(); 1863 return 0; 1864} 1865 1866// NOTE: All of these methods use "getUnqualifiedType" to strip off address 1867// space qualifiers if present. 1868inline bool Type::isFunctionType() const { 1869 return isa<FunctionType>(CanonicalType.getUnqualifiedType()); 1870} 1871inline bool Type::isPointerType() const { 1872 return isa<PointerType>(CanonicalType.getUnqualifiedType()); 1873} 1874inline bool Type::isBlockPointerType() const { 1875 return isa<BlockPointerType>(CanonicalType.getUnqualifiedType()); 1876} 1877inline bool Type::isReferenceType() const { 1878 return isa<ReferenceType>(CanonicalType.getUnqualifiedType()); 1879} 1880inline bool Type::isLValueReferenceType() const { 1881 return isa<LValueReferenceType>(CanonicalType.getUnqualifiedType()); 1882} 1883inline bool Type::isRValueReferenceType() const { 1884 return isa<RValueReferenceType>(CanonicalType.getUnqualifiedType()); 1885} 1886inline bool Type::isFunctionPointerType() const { 1887 if (const PointerType* T = getAsPointerType()) 1888 return T->getPointeeType()->isFunctionType(); 1889 else 1890 return false; 1891} 1892inline bool Type::isMemberPointerType() const { 1893 return isa<MemberPointerType>(CanonicalType.getUnqualifiedType()); 1894} 1895inline bool Type::isMemberFunctionPointerType() const { 1896 if (const MemberPointerType* T = getAsMemberPointerType()) 1897 return T->getPointeeType()->isFunctionType(); 1898 else 1899 return false; 1900} 1901inline bool Type::isArrayType() const { 1902 return isa<ArrayType>(CanonicalType.getUnqualifiedType()); 1903} 1904inline bool Type::isConstantArrayType() const { 1905 return isa<ConstantArrayType>(CanonicalType.getUnqualifiedType()); 1906} 1907inline bool Type::isIncompleteArrayType() const { 1908 return isa<IncompleteArrayType>(CanonicalType.getUnqualifiedType()); 1909} 1910inline bool Type::isVariableArrayType() const { 1911 return isa<VariableArrayType>(CanonicalType.getUnqualifiedType()); 1912} 1913inline bool Type::isDependentSizedArrayType() const { 1914 return isa<DependentSizedArrayType>(CanonicalType.getUnqualifiedType()); 1915} 1916inline bool Type::isRecordType() const { 1917 return isa<RecordType>(CanonicalType.getUnqualifiedType()); 1918} 1919inline bool Type::isAnyComplexType() const { 1920 return isa<ComplexType>(CanonicalType.getUnqualifiedType()); 1921} 1922inline bool Type::isVectorType() const { 1923 return isa<VectorType>(CanonicalType.getUnqualifiedType()); 1924} 1925inline bool Type::isExtVectorType() const { 1926 return isa<ExtVectorType>(CanonicalType.getUnqualifiedType()); 1927} 1928inline bool Type::isObjCInterfaceType() const { 1929 return isa<ObjCInterfaceType>(CanonicalType.getUnqualifiedType()); 1930} 1931inline bool Type::isObjCQualifiedInterfaceType() const { 1932 return isa<ObjCQualifiedInterfaceType>(CanonicalType.getUnqualifiedType()); 1933} 1934inline bool Type::isObjCQualifiedIdType() const { 1935 return isa<ObjCQualifiedIdType>(CanonicalType.getUnqualifiedType()); 1936} 1937inline bool Type::isTemplateTypeParmType() const { 1938 return isa<TemplateTypeParmType>(CanonicalType.getUnqualifiedType()); 1939} 1940 1941inline bool Type::isSpecificBuiltinType(unsigned K) const { 1942 if (const BuiltinType *BT = getAsBuiltinType()) 1943 if (BT->getKind() == (BuiltinType::Kind) K) 1944 return true; 1945 return false; 1946} 1947 1948/// \brief Determines whether this is a type for which one can define 1949/// an overloaded operator. 1950inline bool Type::isOverloadableType() const { 1951 return isDependentType() || isRecordType() || isEnumeralType(); 1952} 1953 1954inline bool Type::hasPointerRepresentation() const { 1955 return (isPointerType() || isReferenceType() || isBlockPointerType() || 1956 isObjCInterfaceType() || isObjCQualifiedIdType() || 1957 isObjCQualifiedInterfaceType() || isNullPtrType()); 1958} 1959 1960inline bool Type::hasObjCPointerRepresentation() const { 1961 return (isObjCInterfaceType() || isObjCQualifiedIdType() || 1962 isObjCQualifiedInterfaceType()); 1963} 1964 1965/// Insertion operator for diagnostics. This allows sending QualType's into a 1966/// diagnostic with <<. 1967inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 1968 QualType T) { 1969 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 1970 Diagnostic::ak_qualtype); 1971 return DB; 1972} 1973 1974} // end namespace clang 1975 1976#endif 1977