Type.h revision 11a7f35c2e3a496342031c2ed721f58e691ebfca
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/AST/NestedNameSpecifier.h" 19#include "llvm/Support/Casting.h" 20#include "llvm/ADT/APSInt.h" 21#include "llvm/ADT/FoldingSet.h" 22#include "llvm/ADT/PointerIntPair.h" 23#include "llvm/Bitcode/SerializationFwd.h" 24using llvm::isa; 25using llvm::cast; 26using llvm::cast_or_null; 27using llvm::dyn_cast; 28using llvm::dyn_cast_or_null; 29 30namespace llvm { 31 template <typename T> 32 class PointerLikeTypeTraits; 33} 34 35namespace clang { 36 class ASTContext; 37 class Type; 38 class TypedefDecl; 39 class TemplateDecl; 40 class TemplateTypeParmDecl; 41 class NonTypeTemplateParmDecl; 42 class TemplateTemplateParamDecl; 43 class TagDecl; 44 class RecordDecl; 45 class CXXRecordDecl; 46 class EnumDecl; 47 class FieldDecl; 48 class ObjCInterfaceDecl; 49 class ObjCProtocolDecl; 50 class ObjCMethodDecl; 51 class Expr; 52 class Stmt; 53 class SourceLocation; 54 class StmtIteratorBase; 55 class TemplateArgument; 56 class QualifiedNameType; 57 58 // Provide forward declarations for all of the *Type classes 59#define TYPE(Class, Base) class Class##Type; 60#include "clang/AST/TypeNodes.def" 61 62/// QualType - For efficiency, we don't store CVR-qualified types as nodes on 63/// their own: instead each reference to a type stores the qualifiers. This 64/// greatly reduces the number of nodes we need to allocate for types (for 65/// example we only need one for 'int', 'const int', 'volatile int', 66/// 'const volatile int', etc). 67/// 68/// As an added efficiency bonus, instead of making this a pair, we just store 69/// the three bits we care about in the low bits of the pointer. To handle the 70/// packing/unpacking, we make QualType be a simple wrapper class that acts like 71/// a smart pointer. 72class QualType { 73 llvm::PointerIntPair<Type*, 3> Value; 74public: 75 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 76 Const = 0x1, 77 Restrict = 0x2, 78 Volatile = 0x4, 79 CVRFlags = Const|Restrict|Volatile 80 }; 81 82 enum GCAttrTypes { 83 GCNone = 0, 84 Weak, 85 Strong 86 }; 87 88 QualType() {} 89 90 QualType(const Type *Ptr, unsigned Quals) 91 : Value(const_cast<Type*>(Ptr), Quals) {} 92 93 unsigned getCVRQualifiers() const { return Value.getInt(); } 94 void setCVRQualifiers(unsigned Quals) { Value.setInt(Quals); } 95 Type *getTypePtr() const { return Value.getPointer(); } 96 97 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 98 static QualType getFromOpaquePtr(void *Ptr) { 99 QualType T; 100 T.Value.setFromOpaqueValue(Ptr); 101 return T; 102 } 103 104 Type &operator*() const { 105 return *getTypePtr(); 106 } 107 108 Type *operator->() const { 109 return getTypePtr(); 110 } 111 112 /// isNull - Return true if this QualType doesn't point to a type yet. 113 bool isNull() const { 114 return getTypePtr() == 0; 115 } 116 117 bool isConstQualified() const { 118 return (getCVRQualifiers() & Const) ? true : false; 119 } 120 bool isVolatileQualified() const { 121 return (getCVRQualifiers() & Volatile) ? true : false; 122 } 123 bool isRestrictQualified() const { 124 return (getCVRQualifiers() & Restrict) ? true : false; 125 } 126 127 bool isConstant(ASTContext& Ctx) const; 128 129 /// addConst/addVolatile/addRestrict - add the specified type qual to this 130 /// QualType. 131 void addConst() { Value.setInt(Value.getInt() | Const); } 132 void addVolatile() { Value.setInt(Value.getInt() | Volatile); } 133 void addRestrict() { Value.setInt(Value.getInt() | Restrict); } 134 135 void removeConst() { Value.setInt(Value.getInt() & ~Const); } 136 void removeVolatile() { Value.setInt(Value.getInt() & ~Volatile); } 137 void removeRestrict() { Value.setInt(Value.getInt() & ~Restrict); } 138 139 QualType getQualifiedType(unsigned TQs) const { 140 return QualType(getTypePtr(), TQs); 141 } 142 QualType getWithAdditionalQualifiers(unsigned TQs) const { 143 return QualType(getTypePtr(), TQs|getCVRQualifiers()); 144 } 145 146 QualType withConst() const { return getWithAdditionalQualifiers(Const); } 147 QualType withVolatile() const { return getWithAdditionalQualifiers(Volatile);} 148 QualType withRestrict() const { return getWithAdditionalQualifiers(Restrict);} 149 150 QualType getUnqualifiedType() const; 151 bool isMoreQualifiedThan(QualType Other) const; 152 bool isAtLeastAsQualifiedAs(QualType Other) const; 153 QualType getNonReferenceType() const; 154 155 /// getDesugaredType - Return the specified type with any "sugar" removed from 156 /// the type. This takes off typedefs, typeof's etc. If the outer level of 157 /// the type is already concrete, it returns it unmodified. This is similar 158 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 159 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 160 /// concrete. 161 QualType getDesugaredType() const; 162 163 /// operator==/!= - Indicate whether the specified types and qualifiers are 164 /// identical. 165 bool operator==(const QualType &RHS) const { 166 return Value == RHS.Value; 167 } 168 bool operator!=(const QualType &RHS) const { 169 return Value != RHS.Value; 170 } 171 std::string getAsString() const { 172 std::string S; 173 getAsStringInternal(S); 174 return S; 175 } 176 void getAsStringInternal(std::string &Str) const; 177 178 void dump(const char *s) const; 179 void dump() const; 180 181 void Profile(llvm::FoldingSetNodeID &ID) const { 182 ID.AddPointer(getAsOpaquePtr()); 183 } 184 185public: 186 187 /// getAddressSpace - Return the address space of this type. 188 inline unsigned getAddressSpace() const; 189 190 /// GCAttrTypesAttr - Returns gc attribute of this type. 191 inline QualType::GCAttrTypes getObjCGCAttr() const; 192 193 /// isObjCGCWeak true when Type is objc's weak. 194 bool isObjCGCWeak() const { 195 return getObjCGCAttr() == Weak; 196 } 197 198 /// isObjCGCStrong true when Type is objc's strong. 199 bool isObjCGCStrong() const { 200 return getObjCGCAttr() == Strong; 201 } 202 203 /// Emit - Serialize a QualType to Bitcode. 204 void Emit(llvm::Serializer& S) const; 205 206 /// Read - Deserialize a QualType from Bitcode. 207 static QualType ReadVal(llvm::Deserializer& D); 208 209 void ReadBackpatch(llvm::Deserializer& D); 210}; 211 212} // end clang. 213 214namespace llvm { 215/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 216/// to a specific Type class. 217template<> struct simplify_type<const ::clang::QualType> { 218 typedef ::clang::Type* SimpleType; 219 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 220 return Val.getTypePtr(); 221 } 222}; 223template<> struct simplify_type< ::clang::QualType> 224 : public simplify_type<const ::clang::QualType> {}; 225 226// Teach SmallPtrSet that QualType is "basically a pointer". 227template<> 228class PointerLikeTypeTraits<clang::QualType> { 229public: 230 static inline void *getAsVoidPointer(clang::QualType P) { 231 return P.getAsOpaquePtr(); 232 } 233 static inline clang::QualType getFromVoidPointer(void *P) { 234 return clang::QualType::getFromOpaquePtr(P); 235 } 236 // CVR qualifiers go in low bits. 237 static inline unsigned getNumLowBitsAvailable() { return 0; } 238}; 239} // end namespace llvm 240 241namespace clang { 242 243/// Type - This is the base class of the type hierarchy. A central concept 244/// with types is that each type always has a canonical type. A canonical type 245/// is the type with any typedef names stripped out of it or the types it 246/// references. For example, consider: 247/// 248/// typedef int foo; 249/// typedef foo* bar; 250/// 'int *' 'foo *' 'bar' 251/// 252/// There will be a Type object created for 'int'. Since int is canonical, its 253/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 254/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 255/// there is a PointerType that represents 'int*', which, like 'int', is 256/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 257/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 258/// is also 'int*'. 259/// 260/// Non-canonical types are useful for emitting diagnostics, without losing 261/// information about typedefs being used. Canonical types are useful for type 262/// comparisons (they allow by-pointer equality tests) and useful for reasoning 263/// about whether something has a particular form (e.g. is a function type), 264/// because they implicitly, recursively, strip all typedefs out of a type. 265/// 266/// Types, once created, are immutable. 267/// 268class Type { 269public: 270 enum TypeClass { 271#define TYPE(Class, Base) Class, 272#define ABSTRACT_TYPE(Class, Base) 273#include "clang/AST/TypeNodes.def" 274 TagFirst = Record, TagLast = Enum 275 }; 276 277private: 278 QualType CanonicalType; 279 280 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 281 bool Dependent : 1; 282 283 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 284 /// Note that this should stay at the end of the ivars for Type so that 285 /// subclasses can pack their bitfields into the same word. 286 unsigned TC : 5; 287 288protected: 289 // silence VC++ warning C4355: 'this' : used in base member initializer list 290 Type *this_() { return this; } 291 Type(TypeClass tc, QualType Canonical, bool dependent) 292 : CanonicalType(Canonical.isNull() ? QualType(this_(), 0) : Canonical), 293 Dependent(dependent), TC(tc) {} 294 virtual ~Type() {} 295 virtual void Destroy(ASTContext& C); 296 friend class ASTContext; 297 298 void EmitTypeInternal(llvm::Serializer& S) const; 299 void ReadTypeInternal(llvm::Deserializer& D); 300 301public: 302 TypeClass getTypeClass() const { return static_cast<TypeClass>(TC); } 303 304 bool isCanonical() const { return CanonicalType.getTypePtr() == this; } 305 306 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 307 /// object types, function types, and incomplete types. 308 309 /// \brief Determines whether the type describes an object in memory. 310 /// 311 /// Note that this definition of object type corresponds to the C++ 312 /// definition of object type, which includes incomplete types, as 313 /// opposed to the C definition (which does not include incomplete 314 /// types). 315 bool isObjectType() const; 316 317 /// isIncompleteType - Return true if this is an incomplete type. 318 /// A type that can describe objects, but which lacks information needed to 319 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 320 /// routine will need to determine if the size is actually required. 321 bool isIncompleteType() const; 322 323 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 324 /// type, in other words, not a function type. 325 bool isIncompleteOrObjectType() const { 326 return !isFunctionType(); 327 } 328 329 /// isPODType - Return true if this is a plain-old-data type (C++ 3.9p10). 330 bool isPODType() const; 331 332 /// isVariablyModifiedType (C99 6.7.5.2p2) - Return true for variable array 333 /// types that have a non-constant expression. This does not include "[]". 334 bool isVariablyModifiedType() const; 335 336 /// Helper methods to distinguish type categories. All type predicates 337 /// operate on the canonical type, ignoring typedefs and qualifiers. 338 339 /// isSpecificBuiltinType - Test for a particular builtin type. 340 bool isSpecificBuiltinType(unsigned K) const; 341 342 /// isIntegerType() does *not* include complex integers (a GCC extension). 343 /// isComplexIntegerType() can be used to test for complex integers. 344 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 345 bool isEnumeralType() const; 346 bool isBooleanType() const; 347 bool isCharType() const; 348 bool isWideCharType() const; 349 bool isIntegralType() const; 350 351 /// Floating point categories. 352 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 353 /// isComplexType() does *not* include complex integers (a GCC extension). 354 /// isComplexIntegerType() can be used to test for complex integers. 355 bool isComplexType() const; // C99 6.2.5p11 (complex) 356 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 357 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 358 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 359 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 360 bool isVoidType() const; // C99 6.2.5p19 361 bool isDerivedType() const; // C99 6.2.5p20 362 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 363 bool isAggregateType() const; 364 365 // Type Predicates: Check to see if this type is structurally the specified 366 // type, ignoring typedefs and qualifiers. 367 bool isFunctionType() const; 368 bool isFunctionNoProtoType() const { return getAsFunctionNoProtoType() != 0; } 369 bool isFunctionProtoType() const { return getAsFunctionProtoType() != 0; } 370 bool isPointerType() const; 371 bool isBlockPointerType() const; 372 bool isReferenceType() const; 373 bool isLValueReferenceType() const; 374 bool isRValueReferenceType() const; 375 bool isFunctionPointerType() const; 376 bool isMemberPointerType() const; 377 bool isMemberFunctionPointerType() const; 378 bool isArrayType() const; 379 bool isConstantArrayType() const; 380 bool isIncompleteArrayType() const; 381 bool isVariableArrayType() const; 382 bool isDependentSizedArrayType() const; 383 bool isRecordType() const; 384 bool isClassType() const; 385 bool isStructureType() const; 386 bool isUnionType() const; 387 bool isComplexIntegerType() const; // GCC _Complex integer type. 388 bool isVectorType() const; // GCC vector type. 389 bool isExtVectorType() const; // Extended vector type. 390 bool isObjCInterfaceType() const; // NSString or NSString<foo> 391 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 392 bool isObjCQualifiedIdType() const; // id<foo> 393 bool isTemplateTypeParmType() const; // C++ template type parameter 394 395 /// isDependentType - Whether this type is a dependent type, meaning 396 /// that its definition somehow depends on a template parameter 397 /// (C++ [temp.dep.type]). 398 bool isDependentType() const { return Dependent; } 399 bool isOverloadableType() const; 400 401 /// hasPointerRepresentation - Whether this type is represented 402 /// natively as a pointer; this includes pointers, references, block 403 /// pointers, and Objective-C interface, qualified id, and qualified 404 /// interface types. 405 bool hasPointerRepresentation() const; 406 407 /// hasObjCPointerRepresentation - Whether this type can represent 408 /// an objective pointer type for the purpose of GC'ability 409 bool hasObjCPointerRepresentation() const; 410 411 // Type Checking Functions: Check to see if this type is structurally the 412 // specified type, ignoring typedefs and qualifiers, and return a pointer to 413 // the best type we can. 414 const BuiltinType *getAsBuiltinType() const; 415 const FunctionType *getAsFunctionType() const; 416 const FunctionNoProtoType *getAsFunctionNoProtoType() const; 417 const FunctionProtoType *getAsFunctionProtoType() const; 418 const PointerType *getAsPointerType() const; 419 const BlockPointerType *getAsBlockPointerType() const; 420 const ReferenceType *getAsReferenceType() const; 421 const LValueReferenceType *getAsLValueReferenceType() const; 422 const RValueReferenceType *getAsRValueReferenceType() const; 423 const MemberPointerType *getAsMemberPointerType() const; 424 const TagType *getAsTagType() const; 425 const RecordType *getAsRecordType() const; 426 const RecordType *getAsStructureType() const; 427 /// NOTE: getAs*ArrayType are methods on ASTContext. 428 const TypedefType *getAsTypedefType() const; 429 const RecordType *getAsUnionType() const; 430 const EnumType *getAsEnumType() const; 431 const VectorType *getAsVectorType() const; // GCC vector type. 432 const ComplexType *getAsComplexType() const; 433 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 434 const ExtVectorType *getAsExtVectorType() const; // Extended vector type. 435 const ObjCInterfaceType *getAsObjCInterfaceType() const; 436 const ObjCQualifiedInterfaceType *getAsObjCQualifiedInterfaceType() const; 437 const ObjCQualifiedIdType *getAsObjCQualifiedIdType() const; 438 const TemplateTypeParmType *getAsTemplateTypeParmType() const; 439 440 const ClassTemplateSpecializationType * 441 getAsClassTemplateSpecializationType() const; 442 443 /// getAsPointerToObjCInterfaceType - If this is a pointer to an ObjC 444 /// interface, return the interface type, otherwise return null. 445 const ObjCInterfaceType *getAsPointerToObjCInterfaceType() const; 446 447 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 448 /// element type of the array, potentially with type qualifiers missing. 449 /// This method should never be used when type qualifiers are meaningful. 450 const Type *getArrayElementTypeNoTypeQual() const; 451 452 /// getDesugaredType - Return the specified type with any "sugar" removed from 453 /// the type. This takes off typedefs, typeof's etc. If the outer level of 454 /// the type is already concrete, it returns it unmodified. This is similar 455 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 456 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 457 /// concrete. 458 QualType getDesugaredType() const; 459 460 /// More type predicates useful for type checking/promotion 461 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 462 463 /// isSignedIntegerType - Return true if this is an integer type that is 464 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 465 /// an enum decl which has a signed representation, or a vector of signed 466 /// integer element type. 467 bool isSignedIntegerType() const; 468 469 /// isUnsignedIntegerType - Return true if this is an integer type that is 470 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 471 /// decl which has an unsigned representation, or a vector of unsigned integer 472 /// element type. 473 bool isUnsignedIntegerType() const; 474 475 /// isConstantSizeType - Return true if this is not a variable sized type, 476 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 477 /// incomplete types. 478 bool isConstantSizeType() const; 479 480 QualType getCanonicalTypeInternal() const { return CanonicalType; } 481 void dump() const; 482 virtual void getAsStringInternal(std::string &InnerString) const = 0; 483 static bool classof(const Type *) { return true; } 484 485protected: 486 /// Emit - Emit a Type to bitcode. Used by ASTContext. 487 void Emit(llvm::Serializer& S) const; 488 489 /// Create - Construct a Type from bitcode. Used by ASTContext. 490 static void Create(ASTContext& Context, unsigned i, llvm::Deserializer& S); 491 492 /// EmitImpl - Subclasses must implement this method in order to 493 /// be serialized. 494 // FIXME: Make this abstract once implemented. 495 virtual void EmitImpl(llvm::Serializer& S) const { 496 assert(false && "Serialization for type not supported."); 497 } 498}; 499 500/// ExtQualType - TR18037 (C embedded extensions) 6.2.5p26 501/// This supports all kinds of type attributes; including, 502/// address space qualified types, objective-c's __weak and 503/// __strong attributes. 504/// 505class ExtQualType : public Type, public llvm::FoldingSetNode { 506 /// BaseType - This is the underlying type that this qualifies. All CVR 507 /// qualifiers are stored on the QualType that references this type, so we 508 /// can't have any here. 509 Type *BaseType; 510 511 /// Address Space ID - The address space ID this type is qualified with. 512 unsigned AddressSpace; 513 /// GC __weak/__strong attributes 514 QualType::GCAttrTypes GCAttrType; 515 516 ExtQualType(Type *Base, QualType CanonicalPtr, unsigned AddrSpace, 517 QualType::GCAttrTypes gcAttr) : 518 Type(ExtQual, CanonicalPtr, Base->isDependentType()), BaseType(Base), 519 AddressSpace(AddrSpace), GCAttrType(gcAttr) { 520 assert(!isa<ExtQualType>(BaseType) && 521 "Cannot have ExtQualType of ExtQualType"); 522 } 523 friend class ASTContext; // ASTContext creates these. 524public: 525 Type *getBaseType() const { return BaseType; } 526 QualType::GCAttrTypes getObjCGCAttr() const { return GCAttrType; } 527 unsigned getAddressSpace() const { return AddressSpace; } 528 529 virtual void getAsStringInternal(std::string &InnerString) const; 530 531 void Profile(llvm::FoldingSetNodeID &ID) { 532 Profile(ID, getBaseType(), AddressSpace, GCAttrType); 533 } 534 static void Profile(llvm::FoldingSetNodeID &ID, Type *Base, 535 unsigned AddrSpace, QualType::GCAttrTypes gcAttr) { 536 ID.AddPointer(Base); 537 ID.AddInteger(AddrSpace); 538 ID.AddInteger(gcAttr); 539 } 540 541 static bool classof(const Type *T) { return T->getTypeClass() == ExtQual; } 542 static bool classof(const ExtQualType *) { return true; } 543 544protected: 545 virtual void EmitImpl(llvm::Serializer& S) const; 546 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 547 friend class Type; 548}; 549 550 551/// BuiltinType - This class is used for builtin types like 'int'. Builtin 552/// types are always canonical and have a literal name field. 553class BuiltinType : public Type { 554public: 555 enum Kind { 556 Void, 557 558 Bool, // This is bool and/or _Bool. 559 Char_U, // This is 'char' for targets where char is unsigned. 560 UChar, // This is explicitly qualified unsigned char. 561 UShort, 562 UInt, 563 ULong, 564 ULongLong, 565 566 Char_S, // This is 'char' for targets where char is signed. 567 SChar, // This is explicitly qualified signed char. 568 WChar, // This is 'wchar_t' for C++. 569 Short, 570 Int, 571 Long, 572 LongLong, 573 574 Float, Double, LongDouble, 575 576 Overload, // This represents the type of an overloaded function declaration. 577 Dependent // This represents the type of a type-dependent expression. 578 }; 579private: 580 Kind TypeKind; 581public: 582 BuiltinType(Kind K) 583 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent)), 584 TypeKind(K) {} 585 586 Kind getKind() const { return TypeKind; } 587 const char *getName() const; 588 589 virtual void getAsStringInternal(std::string &InnerString) const; 590 591 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 592 static bool classof(const BuiltinType *) { return true; } 593}; 594 595/// FixedWidthIntType - Used for arbitrary width types that we either don't 596/// want to or can't map to named integer types. These always have a lower 597/// integer rank than builtin types of the same width. 598class FixedWidthIntType : public Type { 599private: 600 unsigned Width; 601 bool Signed; 602public: 603 FixedWidthIntType(unsigned W, bool S) : Type(FixedWidthInt, QualType(), false), 604 Width(W), Signed(S) {} 605 606 unsigned getWidth() const { return Width; } 607 bool isSigned() const { return Signed; } 608 const char *getName() const; 609 610 virtual void getAsStringInternal(std::string &InnerString) const; 611 612 static bool classof(const Type *T) { return T->getTypeClass() == FixedWidthInt; } 613 static bool classof(const FixedWidthIntType *) { return true; } 614}; 615 616/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 617/// types (_Complex float etc) as well as the GCC integer complex extensions. 618/// 619class ComplexType : public Type, public llvm::FoldingSetNode { 620 QualType ElementType; 621 ComplexType(QualType Element, QualType CanonicalPtr) : 622 Type(Complex, CanonicalPtr, Element->isDependentType()), 623 ElementType(Element) { 624 } 625 friend class ASTContext; // ASTContext creates these. 626public: 627 QualType getElementType() const { return ElementType; } 628 629 virtual void getAsStringInternal(std::string &InnerString) const; 630 631 void Profile(llvm::FoldingSetNodeID &ID) { 632 Profile(ID, getElementType()); 633 } 634 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 635 ID.AddPointer(Element.getAsOpaquePtr()); 636 } 637 638 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 639 static bool classof(const ComplexType *) { return true; } 640 641protected: 642 virtual void EmitImpl(llvm::Serializer& S) const; 643 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 644 friend class Type; 645}; 646 647/// PointerType - C99 6.7.5.1 - Pointer Declarators. 648/// 649class PointerType : public Type, public llvm::FoldingSetNode { 650 QualType PointeeType; 651 652 PointerType(QualType Pointee, QualType CanonicalPtr) : 653 Type(Pointer, CanonicalPtr, Pointee->isDependentType()), PointeeType(Pointee) { 654 } 655 friend class ASTContext; // ASTContext creates these. 656public: 657 658 virtual void getAsStringInternal(std::string &InnerString) const; 659 660 QualType getPointeeType() const { return PointeeType; } 661 662 void Profile(llvm::FoldingSetNodeID &ID) { 663 Profile(ID, getPointeeType()); 664 } 665 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 666 ID.AddPointer(Pointee.getAsOpaquePtr()); 667 } 668 669 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 670 static bool classof(const PointerType *) { return true; } 671 672protected: 673 virtual void EmitImpl(llvm::Serializer& S) const; 674 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 675 friend class Type; 676}; 677 678/// BlockPointerType - pointer to a block type. 679/// This type is to represent types syntactically represented as 680/// "void (^)(int)", etc. Pointee is required to always be a function type. 681/// 682class BlockPointerType : public Type, public llvm::FoldingSetNode { 683 QualType PointeeType; // Block is some kind of pointer type 684 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 685 Type(BlockPointer, CanonicalCls, Pointee->isDependentType()), 686 PointeeType(Pointee) { 687 } 688 friend class ASTContext; // ASTContext creates these. 689public: 690 691 // Get the pointee type. Pointee is required to always be a function type. 692 QualType getPointeeType() const { return PointeeType; } 693 694 virtual void getAsStringInternal(std::string &InnerString) const; 695 696 void Profile(llvm::FoldingSetNodeID &ID) { 697 Profile(ID, getPointeeType()); 698 } 699 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 700 ID.AddPointer(Pointee.getAsOpaquePtr()); 701 } 702 703 static bool classof(const Type *T) { 704 return T->getTypeClass() == BlockPointer; 705 } 706 static bool classof(const BlockPointerType *) { return true; } 707 708 protected: 709 virtual void EmitImpl(llvm::Serializer& S) const; 710 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 711 friend class Type; 712}; 713 714/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 715/// 716class ReferenceType : public Type, public llvm::FoldingSetNode { 717 QualType PointeeType; 718 719protected: 720 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef) : 721 Type(tc, CanonicalRef, Referencee->isDependentType()), 722 PointeeType(Referencee) { 723 } 724public: 725 QualType getPointeeType() const { return PointeeType; } 726 727 void Profile(llvm::FoldingSetNodeID &ID) { 728 Profile(ID, getPointeeType()); 729 } 730 static void Profile(llvm::FoldingSetNodeID &ID, QualType Referencee) { 731 ID.AddPointer(Referencee.getAsOpaquePtr()); 732 } 733 734 static bool classof(const Type *T) { 735 return T->getTypeClass() == LValueReference || 736 T->getTypeClass() == RValueReference; 737 } 738 static bool classof(const ReferenceType *) { return true; } 739 740protected: 741 virtual void EmitImpl(llvm::Serializer& S) const; 742}; 743 744/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 745/// 746class LValueReferenceType : public ReferenceType { 747 LValueReferenceType(QualType Referencee, QualType CanonicalRef) : 748 ReferenceType(LValueReference, Referencee, CanonicalRef) { 749 } 750 friend class ASTContext; // ASTContext creates these 751public: 752 virtual void getAsStringInternal(std::string &InnerString) const; 753 754 static bool classof(const Type *T) { 755 return T->getTypeClass() == LValueReference; 756 } 757 static bool classof(const LValueReferenceType *) { return true; } 758 759protected: 760 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 761 friend class Type; 762}; 763 764/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 765/// 766class RValueReferenceType : public ReferenceType { 767 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 768 ReferenceType(RValueReference, Referencee, CanonicalRef) { 769 } 770 friend class ASTContext; // ASTContext creates these 771public: 772 virtual void getAsStringInternal(std::string &InnerString) const; 773 774 static bool classof(const Type *T) { 775 return T->getTypeClass() == RValueReference; 776 } 777 static bool classof(const RValueReferenceType *) { return true; } 778 779protected: 780 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 781 friend class Type; 782}; 783 784/// MemberPointerType - C++ 8.3.3 - Pointers to members 785/// 786class MemberPointerType : public Type, public llvm::FoldingSetNode { 787 QualType PointeeType; 788 /// The class of which the pointee is a member. Must ultimately be a 789 /// RecordType, but could be a typedef or a template parameter too. 790 const Type *Class; 791 792 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 793 Type(MemberPointer, CanonicalPtr, 794 Cls->isDependentType() || Pointee->isDependentType()), 795 PointeeType(Pointee), Class(Cls) { 796 } 797 friend class ASTContext; // ASTContext creates these. 798public: 799 800 QualType getPointeeType() const { return PointeeType; } 801 802 const Type *getClass() const { return Class; } 803 804 virtual void getAsStringInternal(std::string &InnerString) const; 805 806 void Profile(llvm::FoldingSetNodeID &ID) { 807 Profile(ID, getPointeeType(), getClass()); 808 } 809 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 810 const Type *Class) { 811 ID.AddPointer(Pointee.getAsOpaquePtr()); 812 ID.AddPointer(Class); 813 } 814 815 static bool classof(const Type *T) { 816 return T->getTypeClass() == MemberPointer; 817 } 818 static bool classof(const MemberPointerType *) { return true; } 819 820protected: 821 virtual void EmitImpl(llvm::Serializer& S) const; 822 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 823 friend class Type; 824}; 825 826/// ArrayType - C99 6.7.5.2 - Array Declarators. 827/// 828class ArrayType : public Type, public llvm::FoldingSetNode { 829public: 830 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 831 /// an array with a static size (e.g. int X[static 4]), or an array 832 /// with a star size (e.g. int X[*]). 833 /// 'static' is only allowed on function parameters. 834 enum ArraySizeModifier { 835 Normal, Static, Star 836 }; 837private: 838 /// ElementType - The element type of the array. 839 QualType ElementType; 840 841 // NOTE: VC++ treats enums as signed, avoid using the ArraySizeModifier enum 842 /// NOTE: These fields are packed into the bitfields space in the Type class. 843 unsigned SizeModifier : 2; 844 845 /// IndexTypeQuals - Capture qualifiers in declarations like: 846 /// 'int X[static restrict 4]'. For function parameters only. 847 unsigned IndexTypeQuals : 3; 848 849protected: 850 // C++ [temp.dep.type]p1: 851 // A type is dependent if it is... 852 // - an array type constructed from any dependent type or whose 853 // size is specified by a constant expression that is 854 // value-dependent, 855 ArrayType(TypeClass tc, QualType et, QualType can, 856 ArraySizeModifier sm, unsigned tq) 857 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray), 858 ElementType(et), SizeModifier(sm), IndexTypeQuals(tq) {} 859 860 friend class ASTContext; // ASTContext creates these. 861public: 862 QualType getElementType() const { return ElementType; } 863 ArraySizeModifier getSizeModifier() const { 864 return ArraySizeModifier(SizeModifier); 865 } 866 unsigned getIndexTypeQualifier() const { return IndexTypeQuals; } 867 868 static bool classof(const Type *T) { 869 return T->getTypeClass() == ConstantArray || 870 T->getTypeClass() == VariableArray || 871 T->getTypeClass() == IncompleteArray || 872 T->getTypeClass() == DependentSizedArray; 873 } 874 static bool classof(const ArrayType *) { return true; } 875}; 876 877/// ConstantArrayType - This class represents C arrays with a specified constant 878/// size. For example 'int A[100]' has ConstantArrayType where the element type 879/// is 'int' and the size is 100. 880class ConstantArrayType : public ArrayType { 881 llvm::APInt Size; // Allows us to unique the type. 882 883 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 884 ArraySizeModifier sm, unsigned tq) 885 : ArrayType(ConstantArray, et, can, sm, tq), Size(size) {} 886 friend class ASTContext; // ASTContext creates these. 887public: 888 const llvm::APInt &getSize() const { return Size; } 889 virtual void getAsStringInternal(std::string &InnerString) const; 890 891 void Profile(llvm::FoldingSetNodeID &ID) { 892 Profile(ID, getElementType(), getSize(), 893 getSizeModifier(), getIndexTypeQualifier()); 894 } 895 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 896 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 897 unsigned TypeQuals) { 898 ID.AddPointer(ET.getAsOpaquePtr()); 899 ID.AddInteger(ArraySize.getZExtValue()); 900 ID.AddInteger(SizeMod); 901 ID.AddInteger(TypeQuals); 902 } 903 static bool classof(const Type *T) { 904 return T->getTypeClass() == ConstantArray; 905 } 906 static bool classof(const ConstantArrayType *) { return true; } 907 908protected: 909 virtual void EmitImpl(llvm::Serializer& S) const; 910 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 911 friend class Type; 912}; 913 914/// IncompleteArrayType - This class represents C arrays with an unspecified 915/// size. For example 'int A[]' has an IncompleteArrayType where the element 916/// type is 'int' and the size is unspecified. 917class IncompleteArrayType : public ArrayType { 918 IncompleteArrayType(QualType et, QualType can, 919 ArraySizeModifier sm, unsigned tq) 920 : ArrayType(IncompleteArray, et, can, sm, tq) {} 921 friend class ASTContext; // ASTContext creates these. 922public: 923 924 virtual void getAsStringInternal(std::string &InnerString) const; 925 926 static bool classof(const Type *T) { 927 return T->getTypeClass() == IncompleteArray; 928 } 929 static bool classof(const IncompleteArrayType *) { return true; } 930 931 friend class StmtIteratorBase; 932 933 void Profile(llvm::FoldingSetNodeID &ID) { 934 Profile(ID, getElementType(), getSizeModifier(), getIndexTypeQualifier()); 935 } 936 937 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 938 ArraySizeModifier SizeMod, unsigned TypeQuals) { 939 ID.AddPointer(ET.getAsOpaquePtr()); 940 ID.AddInteger(SizeMod); 941 ID.AddInteger(TypeQuals); 942 } 943 944protected: 945 virtual void EmitImpl(llvm::Serializer& S) const; 946 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 947 friend class Type; 948}; 949 950/// VariableArrayType - This class represents C arrays with a specified size 951/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 952/// Since the size expression is an arbitrary expression, we store it as such. 953/// 954/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 955/// should not be: two lexically equivalent variable array types could mean 956/// different things, for example, these variables do not have the same type 957/// dynamically: 958/// 959/// void foo(int x) { 960/// int Y[x]; 961/// ++x; 962/// int Z[x]; 963/// } 964/// 965class VariableArrayType : public ArrayType { 966 /// SizeExpr - An assignment expression. VLA's are only permitted within 967 /// a function block. 968 Stmt *SizeExpr; 969 970 VariableArrayType(QualType et, QualType can, Expr *e, 971 ArraySizeModifier sm, unsigned tq) 972 : ArrayType(VariableArray, et, can, sm, tq), SizeExpr((Stmt*) e) {} 973 friend class ASTContext; // ASTContext creates these. 974 virtual void Destroy(ASTContext& C); 975 976public: 977 Expr *getSizeExpr() const { 978 // We use C-style casts instead of cast<> here because we do not wish 979 // to have a dependency of Type.h on Stmt.h/Expr.h. 980 return (Expr*) SizeExpr; 981 } 982 983 virtual void getAsStringInternal(std::string &InnerString) const; 984 985 static bool classof(const Type *T) { 986 return T->getTypeClass() == VariableArray; 987 } 988 static bool classof(const VariableArrayType *) { return true; } 989 990 friend class StmtIteratorBase; 991 992 void Profile(llvm::FoldingSetNodeID &ID) { 993 assert(0 && "Cannnot unique VariableArrayTypes."); 994 } 995 996protected: 997 virtual void EmitImpl(llvm::Serializer& S) const; 998 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 999 friend class Type; 1000}; 1001 1002/// DependentSizedArrayType - This type represents an array type in 1003/// C++ whose size is a value-dependent expression. For example: 1004/// @code 1005/// template<typename T, int Size> 1006/// class array { 1007/// T data[Size]; 1008/// }; 1009/// @endcode 1010/// For these types, we won't actually know what the array bound is 1011/// until template instantiation occurs, at which point this will 1012/// become either a ConstantArrayType or a VariableArrayType. 1013class DependentSizedArrayType : public ArrayType { 1014 /// SizeExpr - An assignment expression that will instantiate to the 1015 /// size of the array. 1016 Stmt *SizeExpr; 1017 1018 DependentSizedArrayType(QualType et, QualType can, Expr *e, 1019 ArraySizeModifier sm, unsigned tq) 1020 : ArrayType(DependentSizedArray, et, can, sm, tq), SizeExpr((Stmt*) e) {} 1021 friend class ASTContext; // ASTContext creates these. 1022 virtual void Destroy(ASTContext& C); 1023 1024public: 1025 Expr *getSizeExpr() const { 1026 // We use C-style casts instead of cast<> here because we do not wish 1027 // to have a dependency of Type.h on Stmt.h/Expr.h. 1028 return (Expr*) SizeExpr; 1029 } 1030 1031 virtual void getAsStringInternal(std::string &InnerString) const; 1032 1033 static bool classof(const Type *T) { 1034 return T->getTypeClass() == DependentSizedArray; 1035 } 1036 static bool classof(const DependentSizedArrayType *) { return true; } 1037 1038 friend class StmtIteratorBase; 1039 1040 void Profile(llvm::FoldingSetNodeID &ID) { 1041 assert(0 && "Cannnot unique DependentSizedArrayTypes."); 1042 } 1043 1044protected: 1045 virtual void EmitImpl(llvm::Serializer& S) const; 1046 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 1047 friend class Type; 1048}; 1049 1050/// VectorType - GCC generic vector type. This type is created using 1051/// __attribute__((vector_size(n)), where "n" specifies the vector size in 1052/// bytes. Since the constructor takes the number of vector elements, the 1053/// client is responsible for converting the size into the number of elements. 1054class VectorType : public Type, public llvm::FoldingSetNode { 1055protected: 1056 /// ElementType - The element type of the vector. 1057 QualType ElementType; 1058 1059 /// NumElements - The number of elements in the vector. 1060 unsigned NumElements; 1061 1062 VectorType(QualType vecType, unsigned nElements, QualType canonType) : 1063 Type(Vector, canonType, vecType->isDependentType()), 1064 ElementType(vecType), NumElements(nElements) {} 1065 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 1066 QualType canonType) 1067 : Type(tc, canonType, vecType->isDependentType()), ElementType(vecType), 1068 NumElements(nElements) {} 1069 friend class ASTContext; // ASTContext creates these. 1070public: 1071 1072 QualType getElementType() const { return ElementType; } 1073 unsigned getNumElements() const { return NumElements; } 1074 1075 virtual void getAsStringInternal(std::string &InnerString) const; 1076 1077 void Profile(llvm::FoldingSetNodeID &ID) { 1078 Profile(ID, getElementType(), getNumElements(), getTypeClass()); 1079 } 1080 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 1081 unsigned NumElements, TypeClass TypeClass) { 1082 ID.AddPointer(ElementType.getAsOpaquePtr()); 1083 ID.AddInteger(NumElements); 1084 ID.AddInteger(TypeClass); 1085 } 1086 static bool classof(const Type *T) { 1087 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 1088 } 1089 static bool classof(const VectorType *) { return true; } 1090}; 1091 1092/// ExtVectorType - Extended vector type. This type is created using 1093/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 1094/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 1095/// class enables syntactic extensions, like Vector Components for accessing 1096/// points, colors, and textures (modeled after OpenGL Shading Language). 1097class ExtVectorType : public VectorType { 1098 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 1099 VectorType(ExtVector, vecType, nElements, canonType) {} 1100 friend class ASTContext; // ASTContext creates these. 1101public: 1102 static int getPointAccessorIdx(char c) { 1103 switch (c) { 1104 default: return -1; 1105 case 'x': return 0; 1106 case 'y': return 1; 1107 case 'z': return 2; 1108 case 'w': return 3; 1109 } 1110 } 1111 static int getNumericAccessorIdx(char c) { 1112 switch (c) { 1113 default: return -1; 1114 case '0': return 0; 1115 case '1': return 1; 1116 case '2': return 2; 1117 case '3': return 3; 1118 case '4': return 4; 1119 case '5': return 5; 1120 case '6': return 6; 1121 case '7': return 7; 1122 case '8': return 8; 1123 case '9': return 9; 1124 case 'a': return 10; 1125 case 'b': return 11; 1126 case 'c': return 12; 1127 case 'd': return 13; 1128 case 'e': return 14; 1129 case 'f': return 15; 1130 } 1131 } 1132 1133 static int getAccessorIdx(char c) { 1134 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 1135 return getNumericAccessorIdx(c); 1136 } 1137 1138 bool isAccessorWithinNumElements(char c) const { 1139 if (int idx = getAccessorIdx(c)+1) 1140 return unsigned(idx-1) < NumElements; 1141 return false; 1142 } 1143 virtual void getAsStringInternal(std::string &InnerString) const; 1144 1145 static bool classof(const Type *T) { 1146 return T->getTypeClass() == ExtVector; 1147 } 1148 static bool classof(const ExtVectorType *) { return true; } 1149}; 1150 1151/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 1152/// class of FunctionNoProtoType and FunctionProtoType. 1153/// 1154class FunctionType : public Type { 1155 /// SubClassData - This field is owned by the subclass, put here to pack 1156 /// tightly with the ivars in Type. 1157 bool SubClassData : 1; 1158 1159 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1160 /// other bitfields. 1161 /// The qualifiers are part of FunctionProtoType because... 1162 /// 1163 /// C++ 8.3.5p4: The return type, the parameter type list and the 1164 /// cv-qualifier-seq, [...], are part of the function type. 1165 /// 1166 unsigned TypeQuals : 3; 1167 1168 // The type returned by the function. 1169 QualType ResultType; 1170protected: 1171 FunctionType(TypeClass tc, QualType res, bool SubclassInfo, 1172 unsigned typeQuals, QualType Canonical, bool Dependent) 1173 : Type(tc, Canonical, Dependent), 1174 SubClassData(SubclassInfo), TypeQuals(typeQuals), ResultType(res) {} 1175 bool getSubClassData() const { return SubClassData; } 1176 unsigned getTypeQuals() const { return TypeQuals; } 1177public: 1178 1179 QualType getResultType() const { return ResultType; } 1180 1181 1182 static bool classof(const Type *T) { 1183 return T->getTypeClass() == FunctionNoProto || 1184 T->getTypeClass() == FunctionProto; 1185 } 1186 static bool classof(const FunctionType *) { return true; } 1187}; 1188 1189/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 1190/// no information available about its arguments. 1191class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 1192 FunctionNoProtoType(QualType Result, QualType Canonical) 1193 : FunctionType(FunctionNoProto, Result, false, 0, Canonical, 1194 /*Dependent=*/false) {} 1195 friend class ASTContext; // ASTContext creates these. 1196public: 1197 // No additional state past what FunctionType provides. 1198 1199 virtual void getAsStringInternal(std::string &InnerString) const; 1200 1201 void Profile(llvm::FoldingSetNodeID &ID) { 1202 Profile(ID, getResultType()); 1203 } 1204 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType) { 1205 ID.AddPointer(ResultType.getAsOpaquePtr()); 1206 } 1207 1208 static bool classof(const Type *T) { 1209 return T->getTypeClass() == FunctionNoProto; 1210 } 1211 static bool classof(const FunctionNoProtoType *) { return true; } 1212 1213protected: 1214 virtual void EmitImpl(llvm::Serializer& S) const; 1215 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 1216 friend class Type; 1217}; 1218 1219/// FunctionProtoType - Represents a prototype with argument type info, e.g. 1220/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 1221/// arguments, not as having a single void argument. 1222class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 1223 /// hasAnyDependentType - Determine whether there are any dependent 1224 /// types within the arguments passed in. 1225 static bool hasAnyDependentType(const QualType *ArgArray, unsigned numArgs) { 1226 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 1227 if (ArgArray[Idx]->isDependentType()) 1228 return true; 1229 1230 return false; 1231 } 1232 1233 FunctionProtoType(QualType Result, const QualType *ArgArray, unsigned numArgs, 1234 bool isVariadic, unsigned typeQuals, QualType Canonical) 1235 : FunctionType(FunctionProto, Result, isVariadic, typeQuals, Canonical, 1236 (Result->isDependentType() || 1237 hasAnyDependentType(ArgArray, numArgs))), 1238 NumArgs(numArgs) { 1239 // Fill in the trailing argument array. 1240 QualType *ArgInfo = reinterpret_cast<QualType *>(this+1);; 1241 for (unsigned i = 0; i != numArgs; ++i) 1242 ArgInfo[i] = ArgArray[i]; 1243 } 1244 1245 /// NumArgs - The number of arguments this function has, not counting '...'. 1246 unsigned NumArgs; 1247 1248 /// ArgInfo - There is an variable size array after the class in memory that 1249 /// holds the argument types. 1250 1251 friend class ASTContext; // ASTContext creates these. 1252 1253public: 1254 unsigned getNumArgs() const { return NumArgs; } 1255 QualType getArgType(unsigned i) const { 1256 assert(i < NumArgs && "Invalid argument number!"); 1257 return arg_type_begin()[i]; 1258 } 1259 1260 bool isVariadic() const { return getSubClassData(); } 1261 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 1262 1263 typedef const QualType *arg_type_iterator; 1264 arg_type_iterator arg_type_begin() const { 1265 return reinterpret_cast<const QualType *>(this+1); 1266 } 1267 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 1268 1269 virtual void getAsStringInternal(std::string &InnerString) const; 1270 1271 static bool classof(const Type *T) { 1272 return T->getTypeClass() == FunctionProto; 1273 } 1274 static bool classof(const FunctionProtoType *) { return true; } 1275 1276 void Profile(llvm::FoldingSetNodeID &ID); 1277 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 1278 arg_type_iterator ArgTys, unsigned NumArgs, 1279 bool isVariadic, unsigned TypeQuals); 1280 1281protected: 1282 virtual void EmitImpl(llvm::Serializer& S) const; 1283 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 1284 friend class Type; 1285}; 1286 1287 1288class TypedefType : public Type { 1289 TypedefDecl *Decl; 1290protected: 1291 TypedefType(TypeClass tc, TypedefDecl *D, QualType can) 1292 : Type(tc, can, can->isDependentType()), Decl(D) { 1293 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1294 } 1295 friend class ASTContext; // ASTContext creates these. 1296public: 1297 1298 TypedefDecl *getDecl() const { return Decl; } 1299 1300 /// LookThroughTypedefs - Return the ultimate type this typedef corresponds to 1301 /// potentially looking through *all* consecutive typedefs. This returns the 1302 /// sum of the type qualifiers, so if you have: 1303 /// typedef const int A; 1304 /// typedef volatile A B; 1305 /// looking through the typedefs for B will give you "const volatile A". 1306 QualType LookThroughTypedefs() const; 1307 1308 virtual void getAsStringInternal(std::string &InnerString) const; 1309 1310 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 1311 static bool classof(const TypedefType *) { return true; } 1312 1313protected: 1314 virtual void EmitImpl(llvm::Serializer& S) const; 1315 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 1316 friend class Type; 1317}; 1318 1319/// TypeOfExprType (GCC extension). 1320class TypeOfExprType : public Type { 1321 Expr *TOExpr; 1322 TypeOfExprType(Expr *E, QualType can); 1323 friend class ASTContext; // ASTContext creates these. 1324public: 1325 Expr *getUnderlyingExpr() const { return TOExpr; } 1326 1327 virtual void getAsStringInternal(std::string &InnerString) const; 1328 1329 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 1330 static bool classof(const TypeOfExprType *) { return true; } 1331 1332protected: 1333 virtual void EmitImpl(llvm::Serializer& S) const; 1334 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 1335 friend class Type; 1336}; 1337 1338/// TypeOfType (GCC extension). 1339class TypeOfType : public Type { 1340 QualType TOType; 1341 TypeOfType(QualType T, QualType can) 1342 : Type(TypeOf, can, T->isDependentType()), TOType(T) { 1343 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1344 } 1345 friend class ASTContext; // ASTContext creates these. 1346public: 1347 QualType getUnderlyingType() const { return TOType; } 1348 1349 virtual void getAsStringInternal(std::string &InnerString) const; 1350 1351 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 1352 static bool classof(const TypeOfType *) { return true; } 1353 1354protected: 1355 virtual void EmitImpl(llvm::Serializer& S) const; 1356 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 1357 friend class Type; 1358}; 1359 1360class TagType : public Type { 1361 /// Stores the TagDecl associated with this type. The decl will 1362 /// point to the TagDecl that actually defines the entity (or is a 1363 /// definition in progress), if there is such a definition. The 1364 /// single-bit value will be non-zero when this tag is in the 1365 /// process of being defined. 1366 mutable llvm::PointerIntPair<TagDecl *, 1> decl; 1367 friend class ASTContext; 1368 friend class TagDecl; 1369 1370protected: 1371 // FIXME: We'll need the user to pass in information about whether 1372 // this type is dependent or not, because we don't have enough 1373 // information to compute it here. 1374 TagType(TypeClass TC, TagDecl *D, QualType can) 1375 : Type(TC, can, /*Dependent=*/false), decl(D, 0) {} 1376 1377public: 1378 TagDecl *getDecl() const { return decl.getPointer(); } 1379 1380 /// @brief Determines whether this type is in the process of being 1381 /// defined. 1382 bool isBeingDefined() const { return decl.getInt(); } 1383 void setBeingDefined(bool Def) { decl.setInt(Def? 1 : 0); } 1384 1385 virtual void getAsStringInternal(std::string &InnerString) const; 1386 void getAsStringInternal(std::string &InnerString, 1387 bool SuppressTagKind) const; 1388 1389 static bool classof(const Type *T) { 1390 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 1391 } 1392 static bool classof(const TagType *) { return true; } 1393 static bool classof(const RecordType *) { return true; } 1394 static bool classof(const EnumType *) { return true; } 1395 1396protected: 1397 virtual void EmitImpl(llvm::Serializer& S) const; 1398 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 1399 friend class Type; 1400}; 1401 1402/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 1403/// to detect TagType objects of structs/unions/classes. 1404class RecordType : public TagType { 1405protected: 1406 explicit RecordType(RecordDecl *D) 1407 : TagType(Record, reinterpret_cast<TagDecl*>(D), QualType()) { } 1408 explicit RecordType(TypeClass TC, RecordDecl *D) 1409 : TagType(TC, reinterpret_cast<TagDecl*>(D), QualType()) { } 1410 friend class ASTContext; // ASTContext creates these. 1411public: 1412 1413 RecordDecl *getDecl() const { 1414 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 1415 } 1416 1417 // FIXME: This predicate is a helper to QualType/Type. It needs to 1418 // recursively check all fields for const-ness. If any field is declared 1419 // const, it needs to return false. 1420 bool hasConstFields() const { return false; } 1421 1422 // FIXME: RecordType needs to check when it is created that all fields are in 1423 // the same address space, and return that. 1424 unsigned getAddressSpace() const { return 0; } 1425 1426 static bool classof(const TagType *T); 1427 static bool classof(const Type *T) { 1428 return isa<TagType>(T) && classof(cast<TagType>(T)); 1429 } 1430 static bool classof(const RecordType *) { return true; } 1431}; 1432 1433/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 1434/// to detect TagType objects of enums. 1435class EnumType : public TagType { 1436 explicit EnumType(EnumDecl *D) 1437 : TagType(Enum, reinterpret_cast<TagDecl*>(D), QualType()) { } 1438 friend class ASTContext; // ASTContext creates these. 1439public: 1440 1441 EnumDecl *getDecl() const { 1442 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 1443 } 1444 1445 static bool classof(const TagType *T); 1446 static bool classof(const Type *T) { 1447 return isa<TagType>(T) && classof(cast<TagType>(T)); 1448 } 1449 static bool classof(const EnumType *) { return true; } 1450}; 1451 1452class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 1453 unsigned Depth : 16; 1454 unsigned Index : 16; 1455 IdentifierInfo *Name; 1456 1457 TemplateTypeParmType(unsigned D, unsigned I, IdentifierInfo *N, 1458 QualType Canon) 1459 : Type(TemplateTypeParm, Canon, /*Dependent=*/true), 1460 Depth(D), Index(I), Name(N) { } 1461 1462 TemplateTypeParmType(unsigned D, unsigned I) 1463 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true), 1464 Depth(D), Index(I), Name(0) { } 1465 1466 friend class ASTContext; // ASTContext creates these 1467 1468public: 1469 unsigned getDepth() const { return Depth; } 1470 unsigned getIndex() const { return Index; } 1471 IdentifierInfo *getName() const { return Name; } 1472 1473 virtual void getAsStringInternal(std::string &InnerString) const; 1474 1475 void Profile(llvm::FoldingSetNodeID &ID) { 1476 Profile(ID, Depth, Index, Name); 1477 } 1478 1479 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 1480 unsigned Index, IdentifierInfo *Name) { 1481 ID.AddInteger(Depth); 1482 ID.AddInteger(Index); 1483 ID.AddPointer(Name); 1484 } 1485 1486 static bool classof(const Type *T) { 1487 return T->getTypeClass() == TemplateTypeParm; 1488 } 1489 static bool classof(const TemplateTypeParmType *T) { return true; } 1490 1491protected: 1492 virtual void EmitImpl(llvm::Serializer& S) const; 1493 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 1494 friend class Type; 1495}; 1496 1497/// \brief Represents the type of a class template specialization as 1498/// written in the source code. 1499/// 1500/// Class template specialization types represent the syntactic form 1501/// of a template-id that refers to a type, e.g., @c vector<int>. All 1502/// class template specialization types are syntactic sugar, whose 1503/// canonical type will point to some other type node that represents 1504/// the instantiation or class template specialization. For example, a 1505/// class template specialization type of @c vector<int> will refer to 1506/// a tag type for the instantiation 1507/// @c std::vector<int, std::allocator<int>>. 1508class ClassTemplateSpecializationType 1509 : public Type, public llvm::FoldingSetNode { 1510 1511 // FIXME: Do we want templates to have a representation in the type 1512 // system? It will probably help with dependent templates and 1513 // possibly with template-names preceded by a nested-name-specifier. 1514 TemplateDecl *Template; 1515 1516 /// \brief - The number of template arguments named in this class 1517 /// template specialization. 1518 unsigned NumArgs; 1519 1520 ClassTemplateSpecializationType(TemplateDecl *T, 1521 const TemplateArgument *Args, 1522 unsigned NumArgs, QualType Canon); 1523 1524 virtual void Destroy(ASTContext& C); 1525 1526 friend class ASTContext; // ASTContext creates these 1527 1528public: 1529 /// \brief Determine whether any of the given template arguments are 1530 /// dependent. 1531 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 1532 unsigned NumArgs); 1533 1534 /// \brief Print a template argument list, including the '<' and '>' 1535 /// enclosing the template arguments. 1536 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 1537 unsigned NumArgs); 1538 1539 typedef const TemplateArgument * iterator; 1540 1541 iterator begin() const { return getArgs(); } 1542 iterator end() const; 1543 1544 /// \brief Retrieve the template that we are specializing. 1545 TemplateDecl *getTemplate() const { return Template; } 1546 1547 /// \brief Retrieve the template arguments. 1548 const TemplateArgument *getArgs() const { 1549 return reinterpret_cast<const TemplateArgument *>(this + 1); 1550 } 1551 1552 /// \brief Retrieve the number of template arguments. 1553 unsigned getNumArgs() const { return NumArgs; } 1554 1555 /// \brief Retrieve a specific template argument as a type. 1556 /// \precondition @c isArgType(Arg) 1557 const TemplateArgument &getArg(unsigned Idx) const; 1558 1559 virtual void getAsStringInternal(std::string &InnerString) const; 1560 1561 void Profile(llvm::FoldingSetNodeID &ID) { 1562 Profile(ID, Template, getArgs(), NumArgs); 1563 } 1564 1565 static void Profile(llvm::FoldingSetNodeID &ID, TemplateDecl *T, 1566 const TemplateArgument *Args, unsigned NumArgs); 1567 1568 static bool classof(const Type *T) { 1569 return T->getTypeClass() == ClassTemplateSpecialization; 1570 } 1571 static bool classof(const ClassTemplateSpecializationType *T) { return true; } 1572 1573protected: 1574 virtual void EmitImpl(llvm::Serializer& S) const; 1575 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 1576 friend class Type; 1577}; 1578 1579/// \brief Represents a type that was referred to via a qualified 1580/// name, e.g., N::M::type. 1581/// 1582/// This type is used to keep track of a type name as written in the 1583/// source code, including any nested-name-specifiers. The type itself 1584/// is always "sugar", used to express what was written in the source 1585/// code but containing no additional semantic information. 1586class QualifiedNameType : public Type, public llvm::FoldingSetNode { 1587 /// \brief The nested name specifier containing the qualifier. 1588 NestedNameSpecifier *NNS; 1589 1590 /// \brief The type that this qualified name refers to. 1591 QualType NamedType; 1592 1593 QualifiedNameType(NestedNameSpecifier *NNS, QualType NamedType, 1594 QualType CanonType) 1595 : Type(QualifiedName, CanonType, NamedType->isDependentType()), 1596 NNS(NNS), NamedType(NamedType) { } 1597 1598 friend class ASTContext; // ASTContext creates these 1599 1600public: 1601 /// \brief Retrieve the qualification on this type. 1602 NestedNameSpecifier *getQualifier() const { return NNS; } 1603 1604 /// \brief Retrieve the type named by the qualified-id. 1605 QualType getNamedType() const { return NamedType; } 1606 1607 virtual void getAsStringInternal(std::string &InnerString) const; 1608 1609 void Profile(llvm::FoldingSetNodeID &ID) { 1610 Profile(ID, NNS, NamedType); 1611 } 1612 1613 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 1614 QualType NamedType) { 1615 ID.AddPointer(NNS); 1616 NamedType.Profile(ID); 1617 } 1618 1619 static bool classof(const Type *T) { 1620 return T->getTypeClass() == QualifiedName; 1621 } 1622 static bool classof(const QualifiedNameType *T) { return true; } 1623 1624protected: 1625 virtual void EmitImpl(llvm::Serializer& S) const; 1626 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 1627 friend class Type; 1628}; 1629 1630/// \brief Represents a 'typename' specifier that names a type within 1631/// a dependent type, e.g., "typename T::type". 1632/// 1633/// TypenameType has a very similar structure to QualifiedNameType, 1634/// which also involves a nested-name-specifier following by a type, 1635/// and (FIXME!) both can even be prefixed by the 'typename' 1636/// keyword. However, the two types serve very different roles: 1637/// QualifiedNameType is a non-semantic type that serves only as sugar 1638/// to show how a particular type was written in the source 1639/// code. TypenameType, on the other hand, only occurs when the 1640/// nested-name-specifier is dependent, such that we cannot resolve 1641/// the actual type until after instantiation. 1642class TypenameType : public Type, public llvm::FoldingSetNode { 1643 /// \brief The nested name specifier containing the qualifier. 1644 NestedNameSpecifier *NNS; 1645 1646 /// \brief The type that this typename specifier refers to. 1647 /// FIXME: Also need to represent the "template simple-template-id" case. 1648 const IdentifierInfo *Name; 1649 1650 TypenameType(NestedNameSpecifier *NNS, const IdentifierInfo *Name, 1651 QualType CanonType) 1652 : Type(Typename, CanonType, true), NNS(NNS), Name(Name) { 1653 assert(NNS->isDependent() && 1654 "TypenameType requires a dependent nested-name-specifier"); 1655 } 1656 1657 friend class ASTContext; // ASTContext creates these 1658 1659public: 1660 /// \brief Retrieve the qualification on this type. 1661 NestedNameSpecifier *getQualifier() const { return NNS; } 1662 1663 /// \brief Retrieve the type named by the typename specifier. 1664 const IdentifierInfo *getName() const { return Name; } 1665 1666 virtual void getAsStringInternal(std::string &InnerString) const; 1667 1668 void Profile(llvm::FoldingSetNodeID &ID) { 1669 Profile(ID, NNS, Name); 1670 } 1671 1672 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 1673 const IdentifierInfo *Name) { 1674 ID.AddPointer(NNS); 1675 ID.AddPointer(Name); 1676 } 1677 1678 static bool classof(const Type *T) { 1679 return T->getTypeClass() == Typename; 1680 } 1681 static bool classof(const TypenameType *T) { return true; } 1682 1683protected: 1684 virtual void EmitImpl(llvm::Serializer& S) const; 1685 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 1686 friend class Type; 1687}; 1688 1689/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 1690/// object oriented design. They basically correspond to C++ classes. There 1691/// are two kinds of interface types, normal interfaces like "NSString" and 1692/// qualified interfaces, which are qualified with a protocol list like 1693/// "NSString<NSCopyable, NSAmazing>". Qualified interface types are instances 1694/// of ObjCQualifiedInterfaceType, which is a subclass of ObjCInterfaceType. 1695class ObjCInterfaceType : public Type { 1696 ObjCInterfaceDecl *Decl; 1697protected: 1698 ObjCInterfaceType(TypeClass tc, ObjCInterfaceDecl *D) : 1699 Type(tc, QualType(), /*Dependent=*/false), Decl(D) { } 1700 friend class ASTContext; // ASTContext creates these. 1701public: 1702 1703 ObjCInterfaceDecl *getDecl() const { return Decl; } 1704 1705 /// qual_iterator and friends: this provides access to the (potentially empty) 1706 /// list of protocols qualifying this interface. If this is an instance of 1707 /// ObjCQualifiedInterfaceType it returns the list, otherwise it returns an 1708 /// empty list if there are no qualifying protocols. 1709 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 1710 inline qual_iterator qual_begin() const; 1711 inline qual_iterator qual_end() const; 1712 bool qual_empty() const { return getTypeClass() != ObjCQualifiedInterface; } 1713 1714 /// getNumProtocols - Return the number of qualifying protocols in this 1715 /// interface type, or 0 if there are none. 1716 inline unsigned getNumProtocols() const; 1717 1718 /// getProtocol - Return the specified qualifying protocol. 1719 inline ObjCProtocolDecl *getProtocol(unsigned i) const; 1720 1721 1722 virtual void getAsStringInternal(std::string &InnerString) const; 1723 static bool classof(const Type *T) { 1724 return T->getTypeClass() == ObjCInterface || 1725 T->getTypeClass() == ObjCQualifiedInterface; 1726 } 1727 static bool classof(const ObjCInterfaceType *) { return true; } 1728}; 1729 1730/// ObjCQualifiedInterfaceType - This class represents interface types 1731/// conforming to a list of protocols, such as INTF<Proto1, Proto2, Proto1>. 1732/// 1733/// Duplicate protocols are removed and protocol list is canonicalized to be in 1734/// alphabetical order. 1735class ObjCQualifiedInterfaceType : public ObjCInterfaceType, 1736 public llvm::FoldingSetNode { 1737 1738 // List of protocols for this protocol conforming object type 1739 // List is sorted on protocol name. No protocol is enterred more than once. 1740 llvm::SmallVector<ObjCProtocolDecl*, 4> Protocols; 1741 1742 ObjCQualifiedInterfaceType(ObjCInterfaceDecl *D, 1743 ObjCProtocolDecl **Protos, unsigned NumP) : 1744 ObjCInterfaceType(ObjCQualifiedInterface, D), 1745 Protocols(Protos, Protos+NumP) { } 1746 friend class ASTContext; // ASTContext creates these. 1747public: 1748 1749 ObjCProtocolDecl *getProtocol(unsigned i) const { 1750 return Protocols[i]; 1751 } 1752 unsigned getNumProtocols() const { 1753 return Protocols.size(); 1754 } 1755 1756 qual_iterator qual_begin() const { return Protocols.begin(); } 1757 qual_iterator qual_end() const { return Protocols.end(); } 1758 1759 virtual void getAsStringInternal(std::string &InnerString) const; 1760 1761 void Profile(llvm::FoldingSetNodeID &ID); 1762 static void Profile(llvm::FoldingSetNodeID &ID, 1763 const ObjCInterfaceDecl *Decl, 1764 ObjCProtocolDecl **protocols, unsigned NumProtocols); 1765 1766 static bool classof(const Type *T) { 1767 return T->getTypeClass() == ObjCQualifiedInterface; 1768 } 1769 static bool classof(const ObjCQualifiedInterfaceType *) { return true; } 1770}; 1771 1772inline ObjCInterfaceType::qual_iterator ObjCInterfaceType::qual_begin() const { 1773 if (const ObjCQualifiedInterfaceType *QIT = 1774 dyn_cast<ObjCQualifiedInterfaceType>(this)) 1775 return QIT->qual_begin(); 1776 return 0; 1777} 1778inline ObjCInterfaceType::qual_iterator ObjCInterfaceType::qual_end() const { 1779 if (const ObjCQualifiedInterfaceType *QIT = 1780 dyn_cast<ObjCQualifiedInterfaceType>(this)) 1781 return QIT->qual_end(); 1782 return 0; 1783} 1784 1785/// getNumProtocols - Return the number of qualifying protocols in this 1786/// interface type, or 0 if there are none. 1787inline unsigned ObjCInterfaceType::getNumProtocols() const { 1788 if (const ObjCQualifiedInterfaceType *QIT = 1789 dyn_cast<ObjCQualifiedInterfaceType>(this)) 1790 return QIT->getNumProtocols(); 1791 return 0; 1792} 1793 1794/// getProtocol - Return the specified qualifying protocol. 1795inline ObjCProtocolDecl *ObjCInterfaceType::getProtocol(unsigned i) const { 1796 return cast<ObjCQualifiedInterfaceType>(this)->getProtocol(i); 1797} 1798 1799 1800 1801/// ObjCQualifiedIdType - to represent id<protocol-list>. 1802/// 1803/// Duplicate protocols are removed and protocol list is canonicalized to be in 1804/// alphabetical order. 1805class ObjCQualifiedIdType : public Type, 1806 public llvm::FoldingSetNode { 1807 // List of protocols for this protocol conforming 'id' type 1808 // List is sorted on protocol name. No protocol is enterred more than once. 1809 llvm::SmallVector<ObjCProtocolDecl*, 8> Protocols; 1810 1811 ObjCQualifiedIdType(ObjCProtocolDecl **Protos, unsigned NumP) 1812 : Type(ObjCQualifiedId, QualType()/*these are always canonical*/, 1813 /*Dependent=*/false), 1814 Protocols(Protos, Protos+NumP) { } 1815 friend class ASTContext; // ASTContext creates these. 1816public: 1817 1818 ObjCProtocolDecl *getProtocols(unsigned i) const { 1819 return Protocols[i]; 1820 } 1821 unsigned getNumProtocols() const { 1822 return Protocols.size(); 1823 } 1824 ObjCProtocolDecl **getReferencedProtocols() { 1825 return &Protocols[0]; 1826 } 1827 1828 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 1829 qual_iterator qual_begin() const { return Protocols.begin(); } 1830 qual_iterator qual_end() const { return Protocols.end(); } 1831 1832 virtual void getAsStringInternal(std::string &InnerString) const; 1833 1834 void Profile(llvm::FoldingSetNodeID &ID); 1835 static void Profile(llvm::FoldingSetNodeID &ID, 1836 ObjCProtocolDecl **protocols, unsigned NumProtocols); 1837 1838 static bool classof(const Type *T) { 1839 return T->getTypeClass() == ObjCQualifiedId; 1840 } 1841 static bool classof(const ObjCQualifiedIdType *) { return true; } 1842 1843}; 1844 1845/// ObjCQualifiedClassType - to represent Class<protocol-list>. 1846/// 1847/// Duplicate protocols are removed and protocol list is canonicalized to be in 1848/// alphabetical order. 1849class ObjCQualifiedClassType : public Type, 1850 public llvm::FoldingSetNode { 1851 // List of protocols for this protocol conforming 'id' type 1852 // List is sorted on protocol name. No protocol is enterred more than once. 1853 llvm::SmallVector<ObjCProtocolDecl*, 8> Protocols; 1854 1855 ObjCQualifiedClassType(ObjCProtocolDecl **Protos, unsigned NumP) 1856 : Type(ObjCQualifiedClass, QualType()/*these are always canonical*/, 1857 /*Dependent=*/false), 1858 Protocols(Protos, Protos+NumP) { } 1859 friend class ASTContext; // ASTContext creates these. 1860public: 1861 1862 ObjCProtocolDecl *getProtocols(unsigned i) const { 1863 return Protocols[i]; 1864 } 1865 unsigned getNumProtocols() const { 1866 return Protocols.size(); 1867 } 1868 ObjCProtocolDecl **getReferencedProtocols() { 1869 return &Protocols[0]; 1870 } 1871 1872 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 1873 qual_iterator qual_begin() const { return Protocols.begin(); } 1874 qual_iterator qual_end() const { return Protocols.end(); } 1875 1876 virtual void getAsStringInternal(std::string &InnerString) const; 1877 1878 void Profile(llvm::FoldingSetNodeID &ID); 1879 static void Profile(llvm::FoldingSetNodeID &ID, 1880 ObjCProtocolDecl **protocols, unsigned NumProtocols); 1881 1882 static bool classof(const Type *T) { 1883 return T->getTypeClass() == ObjCQualifiedClass; 1884 } 1885 static bool classof(const ObjCQualifiedClassType *) { return true; } 1886 1887}; 1888 1889// Inline function definitions. 1890 1891/// getUnqualifiedType - Return the type without any qualifiers. 1892inline QualType QualType::getUnqualifiedType() const { 1893 Type *TP = getTypePtr(); 1894 if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(TP)) 1895 TP = EXTQT->getBaseType(); 1896 return QualType(TP, 0); 1897} 1898 1899/// getAddressSpace - Return the address space of this type. 1900inline unsigned QualType::getAddressSpace() const { 1901 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 1902 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 1903 return AT->getElementType().getAddressSpace(); 1904 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 1905 return RT->getAddressSpace(); 1906 if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(CT)) 1907 return EXTQT->getAddressSpace(); 1908 return 0; 1909} 1910 1911/// getObjCGCAttr - Return the gc attribute of this type. 1912inline QualType::GCAttrTypes QualType::getObjCGCAttr() const { 1913 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 1914 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 1915 return AT->getElementType().getObjCGCAttr(); 1916 if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(CT)) 1917 return EXTQT->getObjCGCAttr(); 1918 if (const PointerType *PT = CT->getAsPointerType()) 1919 return PT->getPointeeType().getObjCGCAttr(); 1920 return GCNone; 1921} 1922 1923/// isMoreQualifiedThan - Determine whether this type is more 1924/// qualified than the Other type. For example, "const volatile int" 1925/// is more qualified than "const int", "volatile int", and 1926/// "int". However, it is not more qualified than "const volatile 1927/// int". 1928inline bool QualType::isMoreQualifiedThan(QualType Other) const { 1929 // FIXME: Handle address spaces 1930 unsigned MyQuals = this->getCVRQualifiers(); 1931 unsigned OtherQuals = Other.getCVRQualifiers(); 1932 assert(this->getAddressSpace() == 0 && "Address space not checked"); 1933 assert(Other.getAddressSpace() == 0 && "Address space not checked"); 1934 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 1935} 1936 1937/// isAtLeastAsQualifiedAs - Determine whether this type is at last 1938/// as qualified as the Other type. For example, "const volatile 1939/// int" is at least as qualified as "const int", "volatile int", 1940/// "int", and "const volatile int". 1941inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 1942 // FIXME: Handle address spaces 1943 unsigned MyQuals = this->getCVRQualifiers(); 1944 unsigned OtherQuals = Other.getCVRQualifiers(); 1945 assert(this->getAddressSpace() == 0 && "Address space not checked"); 1946 assert(Other.getAddressSpace() == 0 && "Address space not checked"); 1947 return (MyQuals | OtherQuals) == MyQuals; 1948} 1949 1950/// getNonReferenceType - If Type is a reference type (e.g., const 1951/// int&), returns the type that the reference refers to ("const 1952/// int"). Otherwise, returns the type itself. This routine is used 1953/// throughout Sema to implement C++ 5p6: 1954/// 1955/// If an expression initially has the type "reference to T" (8.3.2, 1956/// 8.5.3), the type is adjusted to "T" prior to any further 1957/// analysis, the expression designates the object or function 1958/// denoted by the reference, and the expression is an lvalue. 1959inline QualType QualType::getNonReferenceType() const { 1960 if (const ReferenceType *RefType = (*this)->getAsReferenceType()) 1961 return RefType->getPointeeType(); 1962 else 1963 return *this; 1964} 1965 1966inline const TypedefType* Type::getAsTypedefType() const { 1967 return dyn_cast<TypedefType>(this); 1968} 1969inline const ObjCInterfaceType *Type::getAsPointerToObjCInterfaceType() const { 1970 if (const PointerType *PT = getAsPointerType()) 1971 return PT->getPointeeType()->getAsObjCInterfaceType(); 1972 return 0; 1973} 1974 1975// NOTE: All of these methods use "getUnqualifiedType" to strip off address 1976// space qualifiers if present. 1977inline bool Type::isFunctionType() const { 1978 return isa<FunctionType>(CanonicalType.getUnqualifiedType()); 1979} 1980inline bool Type::isPointerType() const { 1981 return isa<PointerType>(CanonicalType.getUnqualifiedType()); 1982} 1983inline bool Type::isBlockPointerType() const { 1984 return isa<BlockPointerType>(CanonicalType); 1985} 1986inline bool Type::isReferenceType() const { 1987 return isa<ReferenceType>(CanonicalType.getUnqualifiedType()); 1988} 1989inline bool Type::isLValueReferenceType() const { 1990 return isa<LValueReferenceType>(CanonicalType.getUnqualifiedType()); 1991} 1992inline bool Type::isRValueReferenceType() const { 1993 return isa<RValueReferenceType>(CanonicalType.getUnqualifiedType()); 1994} 1995inline bool Type::isFunctionPointerType() const { 1996 if (const PointerType* T = getAsPointerType()) 1997 return T->getPointeeType()->isFunctionType(); 1998 else 1999 return false; 2000} 2001inline bool Type::isMemberPointerType() const { 2002 return isa<MemberPointerType>(CanonicalType.getUnqualifiedType()); 2003} 2004inline bool Type::isMemberFunctionPointerType() const { 2005 if (const MemberPointerType* T = getAsMemberPointerType()) 2006 return T->getPointeeType()->isFunctionType(); 2007 else 2008 return false; 2009} 2010inline bool Type::isArrayType() const { 2011 return isa<ArrayType>(CanonicalType.getUnqualifiedType()); 2012} 2013inline bool Type::isConstantArrayType() const { 2014 return isa<ConstantArrayType>(CanonicalType.getUnqualifiedType()); 2015} 2016inline bool Type::isIncompleteArrayType() const { 2017 return isa<IncompleteArrayType>(CanonicalType.getUnqualifiedType()); 2018} 2019inline bool Type::isVariableArrayType() const { 2020 return isa<VariableArrayType>(CanonicalType.getUnqualifiedType()); 2021} 2022inline bool Type::isDependentSizedArrayType() const { 2023 return isa<DependentSizedArrayType>(CanonicalType.getUnqualifiedType()); 2024} 2025inline bool Type::isRecordType() const { 2026 return isa<RecordType>(CanonicalType.getUnqualifiedType()); 2027} 2028inline bool Type::isAnyComplexType() const { 2029 return isa<ComplexType>(CanonicalType.getUnqualifiedType()); 2030} 2031inline bool Type::isVectorType() const { 2032 return isa<VectorType>(CanonicalType.getUnqualifiedType()); 2033} 2034inline bool Type::isExtVectorType() const { 2035 return isa<ExtVectorType>(CanonicalType.getUnqualifiedType()); 2036} 2037inline bool Type::isObjCInterfaceType() const { 2038 return isa<ObjCInterfaceType>(CanonicalType.getUnqualifiedType()); 2039} 2040inline bool Type::isObjCQualifiedInterfaceType() const { 2041 return isa<ObjCQualifiedInterfaceType>(CanonicalType.getUnqualifiedType()); 2042} 2043inline bool Type::isObjCQualifiedIdType() const { 2044 return isa<ObjCQualifiedIdType>(CanonicalType.getUnqualifiedType()); 2045} 2046inline bool Type::isTemplateTypeParmType() const { 2047 return isa<TemplateTypeParmType>(CanonicalType.getUnqualifiedType()); 2048} 2049 2050inline bool Type::isSpecificBuiltinType(unsigned K) const { 2051 if (const BuiltinType *BT = getAsBuiltinType()) 2052 if (BT->getKind() == (BuiltinType::Kind) K) 2053 return true; 2054 return false; 2055} 2056 2057/// \brief Determines whether this is a type for which one can define 2058/// an overloaded operator. 2059inline bool Type::isOverloadableType() const { 2060 return isDependentType() || isRecordType() || isEnumeralType(); 2061} 2062 2063inline bool Type::hasPointerRepresentation() const { 2064 return (isPointerType() || isReferenceType() || isBlockPointerType() || 2065 isObjCInterfaceType() || isObjCQualifiedIdType() || 2066 isObjCQualifiedInterfaceType()); 2067} 2068 2069inline bool Type::hasObjCPointerRepresentation() const { 2070 return (isObjCInterfaceType() || isObjCQualifiedIdType() || 2071 isObjCQualifiedInterfaceType()); 2072} 2073 2074/// Insertion operator for diagnostics. This allows sending QualType's into a 2075/// diagnostic with <<. 2076inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 2077 QualType T) { 2078 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 2079 Diagnostic::ak_qualtype); 2080 return DB; 2081} 2082 2083} // end namespace clang 2084 2085#endif 2086