Type.h revision 7c80bd64032e610c0dbd74fc0ef6ea334447f2fd
1//===--- Type.h - C Language Family Type Representation ---------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Type interface and subclasses. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_CLANG_AST_TYPE_H 15#define LLVM_CLANG_AST_TYPE_H 16 17#include "clang/Basic/Diagnostic.h" 18#include "llvm/Support/Casting.h" 19#include "llvm/ADT/APSInt.h" 20#include "llvm/ADT/FoldingSet.h" 21#include "llvm/ADT/PointerIntPair.h" 22#include "llvm/Bitcode/SerializationFwd.h" 23using llvm::isa; 24using llvm::cast; 25using llvm::cast_or_null; 26using llvm::dyn_cast; 27using llvm::dyn_cast_or_null; 28 29namespace clang { 30 class ASTContext; 31 class Type; 32 class TypedefDecl; 33 class TemplateDecl; 34 class TemplateTypeParmDecl; 35 class NonTypeTemplateParmDecl; 36 class TemplateTemplateParamDecl; 37 class TagDecl; 38 class RecordDecl; 39 class CXXRecordDecl; 40 class EnumDecl; 41 class FieldDecl; 42 class ObjCInterfaceDecl; 43 class ObjCProtocolDecl; 44 class ObjCMethodDecl; 45 class Expr; 46 class Stmt; 47 class SourceLocation; 48 class StmtIteratorBase; 49 class TemplateArgument; 50 51 // Provide forward declarations for all of the *Type classes 52#define TYPE(Class, Base) class Class##Type; 53#include "clang/AST/TypeNodes.def" 54 55/// QualType - For efficiency, we don't store CVR-qualified types as nodes on 56/// their own: instead each reference to a type stores the qualifiers. This 57/// greatly reduces the number of nodes we need to allocate for types (for 58/// example we only need one for 'int', 'const int', 'volatile int', 59/// 'const volatile int', etc). 60/// 61/// As an added efficiency bonus, instead of making this a pair, we just store 62/// the three bits we care about in the low bits of the pointer. To handle the 63/// packing/unpacking, we make QualType be a simple wrapper class that acts like 64/// a smart pointer. 65class QualType { 66 llvm::PointerIntPair<Type*, 3> Value; 67public: 68 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 69 Const = 0x1, 70 Restrict = 0x2, 71 Volatile = 0x4, 72 CVRFlags = Const|Restrict|Volatile 73 }; 74 75 enum GCAttrTypes { 76 GCNone = 0, 77 Weak, 78 Strong 79 }; 80 81 QualType() {} 82 83 QualType(const Type *Ptr, unsigned Quals) 84 : Value(const_cast<Type*>(Ptr), Quals) {} 85 86 unsigned getCVRQualifiers() const { return Value.getInt(); } 87 void setCVRQualifiers(unsigned Quals) { Value.setInt(Quals); } 88 Type *getTypePtr() const { return Value.getPointer(); } 89 90 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 91 static QualType getFromOpaquePtr(void *Ptr) { 92 QualType T; 93 T.Value.setFromOpaqueValue(Ptr); 94 return T; 95 } 96 97 Type &operator*() const { 98 return *getTypePtr(); 99 } 100 101 Type *operator->() const { 102 return getTypePtr(); 103 } 104 105 /// isNull - Return true if this QualType doesn't point to a type yet. 106 bool isNull() const { 107 return getTypePtr() == 0; 108 } 109 110 bool isConstQualified() const { 111 return (getCVRQualifiers() & Const) ? true : false; 112 } 113 bool isVolatileQualified() const { 114 return (getCVRQualifiers() & Volatile) ? true : false; 115 } 116 bool isRestrictQualified() const { 117 return (getCVRQualifiers() & Restrict) ? true : false; 118 } 119 120 bool isConstant(ASTContext& Ctx) const; 121 122 /// addConst/addVolatile/addRestrict - add the specified type qual to this 123 /// QualType. 124 void addConst() { Value.setInt(Value.getInt() | Const); } 125 void addVolatile() { Value.setInt(Value.getInt() | Volatile); } 126 void addRestrict() { Value.setInt(Value.getInt() | Restrict); } 127 128 void removeConst() { Value.setInt(Value.getInt() & ~Const); } 129 void removeVolatile() { Value.setInt(Value.getInt() & ~Volatile); } 130 void removeRestrict() { Value.setInt(Value.getInt() & ~Restrict); } 131 132 QualType getQualifiedType(unsigned TQs) const { 133 return QualType(getTypePtr(), TQs); 134 } 135 QualType getWithAdditionalQualifiers(unsigned TQs) const { 136 return QualType(getTypePtr(), TQs|getCVRQualifiers()); 137 } 138 139 QualType withConst() const { return getWithAdditionalQualifiers(Const); } 140 QualType withVolatile() const { return getWithAdditionalQualifiers(Volatile);} 141 QualType withRestrict() const { return getWithAdditionalQualifiers(Restrict);} 142 143 QualType getUnqualifiedType() const; 144 bool isMoreQualifiedThan(QualType Other) const; 145 bool isAtLeastAsQualifiedAs(QualType Other) const; 146 QualType getNonReferenceType() const; 147 148 149 /// operator==/!= - Indicate whether the specified types and qualifiers are 150 /// identical. 151 bool operator==(const QualType &RHS) const { 152 return Value == RHS.Value; 153 } 154 bool operator!=(const QualType &RHS) const { 155 return Value != RHS.Value; 156 } 157 std::string getAsString() const { 158 std::string S; 159 getAsStringInternal(S); 160 return S; 161 } 162 void getAsStringInternal(std::string &Str) const; 163 164 void dump(const char *s) const; 165 void dump() const; 166 167 void Profile(llvm::FoldingSetNodeID &ID) const { 168 ID.AddPointer(getAsOpaquePtr()); 169 } 170 171public: 172 173 /// getAddressSpace - Return the address space of this type. 174 inline unsigned getAddressSpace() const; 175 176 /// GCAttrTypesAttr - Returns gc attribute of this type. 177 inline QualType::GCAttrTypes getObjCGCAttr() const; 178 179 /// isObjCGCWeak true when Type is objc's weak. 180 bool isObjCGCWeak() const { 181 return getObjCGCAttr() == Weak; 182 } 183 184 /// isObjCGCStrong true when Type is objc's strong. 185 bool isObjCGCStrong() const { 186 return getObjCGCAttr() == Strong; 187 } 188 189 /// Emit - Serialize a QualType to Bitcode. 190 void Emit(llvm::Serializer& S) const; 191 192 /// Read - Deserialize a QualType from Bitcode. 193 static QualType ReadVal(llvm::Deserializer& D); 194 195 void ReadBackpatch(llvm::Deserializer& D); 196}; 197 198} // end clang. 199 200namespace llvm { 201/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 202/// to a specific Type class. 203template<> struct simplify_type<const ::clang::QualType> { 204 typedef ::clang::Type* SimpleType; 205 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 206 return Val.getTypePtr(); 207 } 208}; 209template<> struct simplify_type< ::clang::QualType> 210 : public simplify_type<const ::clang::QualType> {}; 211 212} // end namespace llvm 213 214namespace clang { 215 216/// Type - This is the base class of the type hierarchy. A central concept 217/// with types is that each type always has a canonical type. A canonical type 218/// is the type with any typedef names stripped out of it or the types it 219/// references. For example, consider: 220/// 221/// typedef int foo; 222/// typedef foo* bar; 223/// 'int *' 'foo *' 'bar' 224/// 225/// There will be a Type object created for 'int'. Since int is canonical, its 226/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 227/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 228/// there is a PointerType that represents 'int*', which, like 'int', is 229/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 230/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 231/// is also 'int*'. 232/// 233/// Non-canonical types are useful for emitting diagnostics, without losing 234/// information about typedefs being used. Canonical types are useful for type 235/// comparisons (they allow by-pointer equality tests) and useful for reasoning 236/// about whether something has a particular form (e.g. is a function type), 237/// because they implicitly, recursively, strip all typedefs out of a type. 238/// 239/// Types, once created, are immutable. 240/// 241class Type { 242public: 243 enum TypeClass { 244#define TYPE(Class, Base) Class, 245#define ABSTRACT_TYPE(Class, Base) 246#include "clang/AST/TypeNodes.def" 247 TagFirst = Record, TagLast = Enum 248 }; 249 250private: 251 QualType CanonicalType; 252 253 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 254 bool Dependent : 1; 255 256 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 257 /// Note that this should stay at the end of the ivars for Type so that 258 /// subclasses can pack their bitfields into the same word. 259 unsigned TC : 5; 260 261protected: 262 // silence VC++ warning C4355: 'this' : used in base member initializer list 263 Type *this_() { return this; } 264 Type(TypeClass tc, QualType Canonical, bool dependent) 265 : CanonicalType(Canonical.isNull() ? QualType(this_(), 0) : Canonical), 266 Dependent(dependent), TC(tc) {} 267 virtual ~Type() {} 268 virtual void Destroy(ASTContext& C); 269 friend class ASTContext; 270 271 void EmitTypeInternal(llvm::Serializer& S) const; 272 void ReadTypeInternal(llvm::Deserializer& D); 273 274public: 275 TypeClass getTypeClass() const { return static_cast<TypeClass>(TC); } 276 277 bool isCanonical() const { return CanonicalType.getTypePtr() == this; } 278 279 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 280 /// object types, function types, and incomplete types. 281 282 /// isObjectType - types that fully describe objects. An object is a region 283 /// of memory that can be examined and stored into (H&S). 284 bool isObjectType() const; 285 286 /// isIncompleteType - Return true if this is an incomplete type. 287 /// A type that can describe objects, but which lacks information needed to 288 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 289 /// routine will need to determine if the size is actually required. 290 bool isIncompleteType() const; 291 292 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 293 /// type, in other words, not a function type. 294 bool isIncompleteOrObjectType() const { 295 return !isFunctionType(); 296 } 297 298 /// isPODType - Return true if this is a plain-old-data type (C++ 3.9p10). 299 bool isPODType() const; 300 301 /// isVariablyModifiedType (C99 6.7.5.2p2) - Return true for variable array 302 /// types that have a non-constant expression. This does not include "[]". 303 bool isVariablyModifiedType() const; 304 305 /// Helper methods to distinguish type categories. All type predicates 306 /// operate on the canonical type, ignoring typedefs and qualifiers. 307 308 /// isSpecificBuiltinType - Test for a particular builtin type. 309 bool isSpecificBuiltinType(unsigned K) const; 310 311 /// isIntegerType() does *not* include complex integers (a GCC extension). 312 /// isComplexIntegerType() can be used to test for complex integers. 313 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 314 bool isEnumeralType() const; 315 bool isBooleanType() const; 316 bool isCharType() const; 317 bool isWideCharType() const; 318 bool isIntegralType() const; 319 320 /// Floating point categories. 321 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 322 /// isComplexType() does *not* include complex integers (a GCC extension). 323 /// isComplexIntegerType() can be used to test for complex integers. 324 bool isComplexType() const; // C99 6.2.5p11 (complex) 325 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 326 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 327 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 328 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 329 bool isVoidType() const; // C99 6.2.5p19 330 bool isDerivedType() const; // C99 6.2.5p20 331 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 332 bool isAggregateType() const; 333 334 // Type Predicates: Check to see if this type is structurally the specified 335 // type, ignoring typedefs and qualifiers. 336 bool isFunctionType() const; 337 bool isPointerType() const; 338 bool isBlockPointerType() const; 339 bool isReferenceType() const; 340 bool isLValueReferenceType() const; 341 bool isRValueReferenceType() const; 342 bool isFunctionPointerType() const; 343 bool isMemberPointerType() const; 344 bool isMemberFunctionPointerType() const; 345 bool isArrayType() const; 346 bool isConstantArrayType() const; 347 bool isIncompleteArrayType() const; 348 bool isVariableArrayType() const; 349 bool isDependentSizedArrayType() const; 350 bool isRecordType() const; 351 bool isClassType() const; 352 bool isStructureType() const; 353 bool isUnionType() const; 354 bool isComplexIntegerType() const; // GCC _Complex integer type. 355 bool isVectorType() const; // GCC vector type. 356 bool isExtVectorType() const; // Extended vector type. 357 bool isObjCInterfaceType() const; // NSString or NSString<foo> 358 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 359 bool isObjCQualifiedIdType() const; // id<foo> 360 bool isTemplateTypeParmType() const; // C++ template type parameter 361 362 /// isDependentType - Whether this type is a dependent type, meaning 363 /// that its definition somehow depends on a template parameter 364 /// (C++ [temp.dep.type]). 365 bool isDependentType() const { return Dependent; } 366 bool isOverloadableType() const; 367 368 /// hasPointerRepresentation - Whether this type is represented 369 /// natively as a pointer; this includes pointers, references, block 370 /// pointers, and Objective-C interface, qualified id, and qualified 371 /// interface types. 372 bool hasPointerRepresentation() const; 373 374 /// hasObjCPointerRepresentation - Whether this type can represent 375 /// an objective pointer type for the purpose of GC'ability 376 bool hasObjCPointerRepresentation() const; 377 378 // Type Checking Functions: Check to see if this type is structurally the 379 // specified type, ignoring typedefs and qualifiers, and return a pointer to 380 // the best type we can. 381 const BuiltinType *getAsBuiltinType() const; 382 const FunctionType *getAsFunctionType() const; 383 const FunctionNoProtoType *getAsFunctionNoProtoType() const; 384 const FunctionProtoType *getAsFunctionProtoType() const; 385 const PointerType *getAsPointerType() const; 386 const BlockPointerType *getAsBlockPointerType() const; 387 const ReferenceType *getAsReferenceType() const; 388 const LValueReferenceType *getAsLValueReferenceType() const; 389 const RValueReferenceType *getAsRValueReferenceType() const; 390 const MemberPointerType *getAsMemberPointerType() const; 391 const TagType *getAsTagType() const; 392 const RecordType *getAsRecordType() const; 393 const RecordType *getAsStructureType() const; 394 /// NOTE: getAs*ArrayType are methods on ASTContext. 395 const TypedefType *getAsTypedefType() const; 396 const RecordType *getAsUnionType() const; 397 const EnumType *getAsEnumType() const; 398 const VectorType *getAsVectorType() const; // GCC vector type. 399 const ComplexType *getAsComplexType() const; 400 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 401 const ExtVectorType *getAsExtVectorType() const; // Extended vector type. 402 const ObjCInterfaceType *getAsObjCInterfaceType() const; 403 const ObjCQualifiedInterfaceType *getAsObjCQualifiedInterfaceType() const; 404 const ObjCQualifiedIdType *getAsObjCQualifiedIdType() const; 405 const TemplateTypeParmType *getAsTemplateTypeParmType() const; 406 407 const ClassTemplateSpecializationType * 408 getClassTemplateSpecializationType() const; 409 410 /// getAsPointerToObjCInterfaceType - If this is a pointer to an ObjC 411 /// interface, return the interface type, otherwise return null. 412 const ObjCInterfaceType *getAsPointerToObjCInterfaceType() const; 413 414 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 415 /// element type of the array, potentially with type qualifiers missing. 416 /// This method should never be used when type qualifiers are meaningful. 417 const Type *getArrayElementTypeNoTypeQual() const; 418 419 /// getDesugaredType - Return the specified type with any "sugar" removed from 420 /// the type. This takes off typedefs, typeof's etc. If the outer level of 421 /// the type is already concrete, it returns it unmodified. This is similar 422 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 423 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 424 /// concrete. 425 QualType getDesugaredType() const; 426 427 /// More type predicates useful for type checking/promotion 428 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 429 430 /// isSignedIntegerType - Return true if this is an integer type that is 431 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 432 /// an enum decl which has a signed representation, or a vector of signed 433 /// integer element type. 434 bool isSignedIntegerType() const; 435 436 /// isUnsignedIntegerType - Return true if this is an integer type that is 437 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 438 /// decl which has an unsigned representation, or a vector of unsigned integer 439 /// element type. 440 bool isUnsignedIntegerType() const; 441 442 /// isConstantSizeType - Return true if this is not a variable sized type, 443 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 444 /// incomplete types. 445 bool isConstantSizeType() const; 446 447 QualType getCanonicalTypeInternal() const { return CanonicalType; } 448 void dump() const; 449 virtual void getAsStringInternal(std::string &InnerString) const = 0; 450 static bool classof(const Type *) { return true; } 451 452protected: 453 /// Emit - Emit a Type to bitcode. Used by ASTContext. 454 void Emit(llvm::Serializer& S) const; 455 456 /// Create - Construct a Type from bitcode. Used by ASTContext. 457 static void Create(ASTContext& Context, unsigned i, llvm::Deserializer& S); 458 459 /// EmitImpl - Subclasses must implement this method in order to 460 /// be serialized. 461 // FIXME: Make this abstract once implemented. 462 virtual void EmitImpl(llvm::Serializer& S) const { 463 assert(false && "Serialization for type not supported."); 464 } 465}; 466 467/// ExtQualType - TR18037 (C embedded extensions) 6.2.5p26 468/// This supports all kinds of type attributes; including, 469/// address space qualified types, objective-c's __weak and 470/// __strong attributes. 471/// 472class ExtQualType : public Type, public llvm::FoldingSetNode { 473 /// BaseType - This is the underlying type that this qualifies. All CVR 474 /// qualifiers are stored on the QualType that references this type, so we 475 /// can't have any here. 476 Type *BaseType; 477 478 /// Address Space ID - The address space ID this type is qualified with. 479 unsigned AddressSpace; 480 /// GC __weak/__strong attributes 481 QualType::GCAttrTypes GCAttrType; 482 483 ExtQualType(Type *Base, QualType CanonicalPtr, unsigned AddrSpace, 484 QualType::GCAttrTypes gcAttr) : 485 Type(ExtQual, CanonicalPtr, Base->isDependentType()), BaseType(Base), 486 AddressSpace(AddrSpace), GCAttrType(gcAttr) { 487 assert(!isa<ExtQualType>(BaseType) && 488 "Cannot have ExtQualType of ExtQualType"); 489 } 490 friend class ASTContext; // ASTContext creates these. 491public: 492 Type *getBaseType() const { return BaseType; } 493 QualType::GCAttrTypes getObjCGCAttr() const { return GCAttrType; } 494 unsigned getAddressSpace() const { return AddressSpace; } 495 496 virtual void getAsStringInternal(std::string &InnerString) const; 497 498 void Profile(llvm::FoldingSetNodeID &ID) { 499 Profile(ID, getBaseType(), AddressSpace, GCAttrType); 500 } 501 static void Profile(llvm::FoldingSetNodeID &ID, Type *Base, 502 unsigned AddrSpace, QualType::GCAttrTypes gcAttr) { 503 ID.AddPointer(Base); 504 ID.AddInteger(AddrSpace); 505 ID.AddInteger(gcAttr); 506 } 507 508 static bool classof(const Type *T) { return T->getTypeClass() == ExtQual; } 509 static bool classof(const ExtQualType *) { return true; } 510 511protected: 512 virtual void EmitImpl(llvm::Serializer& S) const; 513 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 514 friend class Type; 515}; 516 517 518/// BuiltinType - This class is used for builtin types like 'int'. Builtin 519/// types are always canonical and have a literal name field. 520class BuiltinType : public Type { 521public: 522 enum Kind { 523 Void, 524 525 Bool, // This is bool and/or _Bool. 526 Char_U, // This is 'char' for targets where char is unsigned. 527 UChar, // This is explicitly qualified unsigned char. 528 UShort, 529 UInt, 530 ULong, 531 ULongLong, 532 533 Char_S, // This is 'char' for targets where char is signed. 534 SChar, // This is explicitly qualified signed char. 535 WChar, // This is 'wchar_t' for C++. 536 Short, 537 Int, 538 Long, 539 LongLong, 540 541 Float, Double, LongDouble, 542 543 Overload, // This represents the type of an overloaded function declaration. 544 Dependent // This represents the type of a type-dependent expression. 545 }; 546private: 547 Kind TypeKind; 548public: 549 BuiltinType(Kind K) 550 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent)), 551 TypeKind(K) {} 552 553 Kind getKind() const { return TypeKind; } 554 const char *getName() const; 555 556 virtual void getAsStringInternal(std::string &InnerString) const; 557 558 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 559 static bool classof(const BuiltinType *) { return true; } 560}; 561 562/// FixedWidthIntType - Used for arbitrary width types that we either don't 563/// want to or can't map to named integer types. These always have a lower 564/// integer rank than builtin types of the same width. 565class FixedWidthIntType : public Type { 566private: 567 unsigned Width; 568 bool Signed; 569public: 570 FixedWidthIntType(unsigned W, bool S) : Type(FixedWidthInt, QualType(), false), 571 Width(W), Signed(S) {} 572 573 unsigned getWidth() const { return Width; } 574 bool isSigned() const { return Signed; } 575 const char *getName() const; 576 577 virtual void getAsStringInternal(std::string &InnerString) const; 578 579 static bool classof(const Type *T) { return T->getTypeClass() == FixedWidthInt; } 580 static bool classof(const FixedWidthIntType *) { return true; } 581}; 582 583/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 584/// types (_Complex float etc) as well as the GCC integer complex extensions. 585/// 586class ComplexType : public Type, public llvm::FoldingSetNode { 587 QualType ElementType; 588 ComplexType(QualType Element, QualType CanonicalPtr) : 589 Type(Complex, CanonicalPtr, Element->isDependentType()), 590 ElementType(Element) { 591 } 592 friend class ASTContext; // ASTContext creates these. 593public: 594 QualType getElementType() const { return ElementType; } 595 596 virtual void getAsStringInternal(std::string &InnerString) const; 597 598 void Profile(llvm::FoldingSetNodeID &ID) { 599 Profile(ID, getElementType()); 600 } 601 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 602 ID.AddPointer(Element.getAsOpaquePtr()); 603 } 604 605 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 606 static bool classof(const ComplexType *) { return true; } 607 608protected: 609 virtual void EmitImpl(llvm::Serializer& S) const; 610 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 611 friend class Type; 612}; 613 614/// PointerType - C99 6.7.5.1 - Pointer Declarators. 615/// 616class PointerType : public Type, public llvm::FoldingSetNode { 617 QualType PointeeType; 618 619 PointerType(QualType Pointee, QualType CanonicalPtr) : 620 Type(Pointer, CanonicalPtr, Pointee->isDependentType()), PointeeType(Pointee) { 621 } 622 friend class ASTContext; // ASTContext creates these. 623public: 624 625 virtual void getAsStringInternal(std::string &InnerString) const; 626 627 QualType getPointeeType() const { return PointeeType; } 628 629 void Profile(llvm::FoldingSetNodeID &ID) { 630 Profile(ID, getPointeeType()); 631 } 632 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 633 ID.AddPointer(Pointee.getAsOpaquePtr()); 634 } 635 636 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 637 static bool classof(const PointerType *) { return true; } 638 639protected: 640 virtual void EmitImpl(llvm::Serializer& S) const; 641 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 642 friend class Type; 643}; 644 645/// BlockPointerType - pointer to a block type. 646/// This type is to represent types syntactically represented as 647/// "void (^)(int)", etc. Pointee is required to always be a function type. 648/// 649class BlockPointerType : public Type, public llvm::FoldingSetNode { 650 QualType PointeeType; // Block is some kind of pointer type 651 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 652 Type(BlockPointer, CanonicalCls, Pointee->isDependentType()), 653 PointeeType(Pointee) { 654 } 655 friend class ASTContext; // ASTContext creates these. 656public: 657 658 // Get the pointee type. Pointee is required to always be a function type. 659 QualType getPointeeType() const { return PointeeType; } 660 661 virtual void getAsStringInternal(std::string &InnerString) const; 662 663 void Profile(llvm::FoldingSetNodeID &ID) { 664 Profile(ID, getPointeeType()); 665 } 666 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 667 ID.AddPointer(Pointee.getAsOpaquePtr()); 668 } 669 670 static bool classof(const Type *T) { 671 return T->getTypeClass() == BlockPointer; 672 } 673 static bool classof(const BlockPointerType *) { return true; } 674 675 protected: 676 virtual void EmitImpl(llvm::Serializer& S) const; 677 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 678 friend class Type; 679}; 680 681/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 682/// 683class ReferenceType : public Type, public llvm::FoldingSetNode { 684 QualType PointeeType; 685 686protected: 687 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef) : 688 Type(tc, CanonicalRef, Referencee->isDependentType()), 689 PointeeType(Referencee) { 690 } 691public: 692 QualType getPointeeType() const { return PointeeType; } 693 694 void Profile(llvm::FoldingSetNodeID &ID) { 695 Profile(ID, getPointeeType()); 696 } 697 static void Profile(llvm::FoldingSetNodeID &ID, QualType Referencee) { 698 ID.AddPointer(Referencee.getAsOpaquePtr()); 699 } 700 701 static bool classof(const Type *T) { 702 return T->getTypeClass() == LValueReference || 703 T->getTypeClass() == RValueReference; 704 } 705 static bool classof(const ReferenceType *) { return true; } 706 707protected: 708 virtual void EmitImpl(llvm::Serializer& S) const; 709}; 710 711/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 712/// 713class LValueReferenceType : public ReferenceType { 714 LValueReferenceType(QualType Referencee, QualType CanonicalRef) : 715 ReferenceType(LValueReference, Referencee, CanonicalRef) { 716 } 717 friend class ASTContext; // ASTContext creates these 718public: 719 virtual void getAsStringInternal(std::string &InnerString) const; 720 721 static bool classof(const Type *T) { 722 return T->getTypeClass() == LValueReference; 723 } 724 static bool classof(const LValueReferenceType *) { return true; } 725 726protected: 727 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 728 friend class Type; 729}; 730 731/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 732/// 733class RValueReferenceType : public ReferenceType { 734 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 735 ReferenceType(RValueReference, Referencee, CanonicalRef) { 736 } 737 friend class ASTContext; // ASTContext creates these 738public: 739 virtual void getAsStringInternal(std::string &InnerString) const; 740 741 static bool classof(const Type *T) { 742 return T->getTypeClass() == RValueReference; 743 } 744 static bool classof(const RValueReferenceType *) { return true; } 745 746protected: 747 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 748 friend class Type; 749}; 750 751/// MemberPointerType - C++ 8.3.3 - Pointers to members 752/// 753class MemberPointerType : public Type, public llvm::FoldingSetNode { 754 QualType PointeeType; 755 /// The class of which the pointee is a member. Must ultimately be a 756 /// RecordType, but could be a typedef or a template parameter too. 757 const Type *Class; 758 759 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 760 Type(MemberPointer, CanonicalPtr, 761 Cls->isDependentType() || Pointee->isDependentType()), 762 PointeeType(Pointee), Class(Cls) { 763 } 764 friend class ASTContext; // ASTContext creates these. 765public: 766 767 QualType getPointeeType() const { return PointeeType; } 768 769 const Type *getClass() const { return Class; } 770 771 virtual void getAsStringInternal(std::string &InnerString) const; 772 773 void Profile(llvm::FoldingSetNodeID &ID) { 774 Profile(ID, getPointeeType(), getClass()); 775 } 776 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 777 const Type *Class) { 778 ID.AddPointer(Pointee.getAsOpaquePtr()); 779 ID.AddPointer(Class); 780 } 781 782 static bool classof(const Type *T) { 783 return T->getTypeClass() == MemberPointer; 784 } 785 static bool classof(const MemberPointerType *) { return true; } 786 787protected: 788 virtual void EmitImpl(llvm::Serializer& S) const; 789 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 790 friend class Type; 791}; 792 793/// ArrayType - C99 6.7.5.2 - Array Declarators. 794/// 795class ArrayType : public Type, public llvm::FoldingSetNode { 796public: 797 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 798 /// an array with a static size (e.g. int X[static 4]), or an array 799 /// with a star size (e.g. int X[*]). 800 /// 'static' is only allowed on function parameters. 801 enum ArraySizeModifier { 802 Normal, Static, Star 803 }; 804private: 805 /// ElementType - The element type of the array. 806 QualType ElementType; 807 808 // NOTE: VC++ treats enums as signed, avoid using the ArraySizeModifier enum 809 /// NOTE: These fields are packed into the bitfields space in the Type class. 810 unsigned SizeModifier : 2; 811 812 /// IndexTypeQuals - Capture qualifiers in declarations like: 813 /// 'int X[static restrict 4]'. For function parameters only. 814 unsigned IndexTypeQuals : 3; 815 816protected: 817 // C++ [temp.dep.type]p1: 818 // A type is dependent if it is... 819 // - an array type constructed from any dependent type or whose 820 // size is specified by a constant expression that is 821 // value-dependent, 822 ArrayType(TypeClass tc, QualType et, QualType can, 823 ArraySizeModifier sm, unsigned tq) 824 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray), 825 ElementType(et), SizeModifier(sm), IndexTypeQuals(tq) {} 826 827 friend class ASTContext; // ASTContext creates these. 828public: 829 QualType getElementType() const { return ElementType; } 830 ArraySizeModifier getSizeModifier() const { 831 return ArraySizeModifier(SizeModifier); 832 } 833 unsigned getIndexTypeQualifier() const { return IndexTypeQuals; } 834 835 static bool classof(const Type *T) { 836 return T->getTypeClass() == ConstantArray || 837 T->getTypeClass() == VariableArray || 838 T->getTypeClass() == IncompleteArray || 839 T->getTypeClass() == DependentSizedArray; 840 } 841 static bool classof(const ArrayType *) { return true; } 842}; 843 844/// ConstantArrayType - This class represents C arrays with a specified constant 845/// size. For example 'int A[100]' has ConstantArrayType where the element type 846/// is 'int' and the size is 100. 847class ConstantArrayType : public ArrayType { 848 llvm::APInt Size; // Allows us to unique the type. 849 850 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 851 ArraySizeModifier sm, unsigned tq) 852 : ArrayType(ConstantArray, et, can, sm, tq), Size(size) {} 853 friend class ASTContext; // ASTContext creates these. 854public: 855 const llvm::APInt &getSize() const { return Size; } 856 virtual void getAsStringInternal(std::string &InnerString) const; 857 858 void Profile(llvm::FoldingSetNodeID &ID) { 859 Profile(ID, getElementType(), getSize(), 860 getSizeModifier(), getIndexTypeQualifier()); 861 } 862 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 863 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 864 unsigned TypeQuals) { 865 ID.AddPointer(ET.getAsOpaquePtr()); 866 ID.AddInteger(ArraySize.getZExtValue()); 867 ID.AddInteger(SizeMod); 868 ID.AddInteger(TypeQuals); 869 } 870 static bool classof(const Type *T) { 871 return T->getTypeClass() == ConstantArray; 872 } 873 static bool classof(const ConstantArrayType *) { return true; } 874 875protected: 876 virtual void EmitImpl(llvm::Serializer& S) const; 877 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 878 friend class Type; 879}; 880 881/// IncompleteArrayType - This class represents C arrays with an unspecified 882/// size. For example 'int A[]' has an IncompleteArrayType where the element 883/// type is 'int' and the size is unspecified. 884class IncompleteArrayType : public ArrayType { 885 IncompleteArrayType(QualType et, QualType can, 886 ArraySizeModifier sm, unsigned tq) 887 : ArrayType(IncompleteArray, et, can, sm, tq) {} 888 friend class ASTContext; // ASTContext creates these. 889public: 890 891 virtual void getAsStringInternal(std::string &InnerString) const; 892 893 static bool classof(const Type *T) { 894 return T->getTypeClass() == IncompleteArray; 895 } 896 static bool classof(const IncompleteArrayType *) { return true; } 897 898 friend class StmtIteratorBase; 899 900 void Profile(llvm::FoldingSetNodeID &ID) { 901 Profile(ID, getElementType(), getSizeModifier(), getIndexTypeQualifier()); 902 } 903 904 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 905 ArraySizeModifier SizeMod, unsigned TypeQuals) { 906 ID.AddPointer(ET.getAsOpaquePtr()); 907 ID.AddInteger(SizeMod); 908 ID.AddInteger(TypeQuals); 909 } 910 911protected: 912 virtual void EmitImpl(llvm::Serializer& S) const; 913 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 914 friend class Type; 915}; 916 917/// VariableArrayType - This class represents C arrays with a specified size 918/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 919/// Since the size expression is an arbitrary expression, we store it as such. 920/// 921/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 922/// should not be: two lexically equivalent variable array types could mean 923/// different things, for example, these variables do not have the same type 924/// dynamically: 925/// 926/// void foo(int x) { 927/// int Y[x]; 928/// ++x; 929/// int Z[x]; 930/// } 931/// 932class VariableArrayType : public ArrayType { 933 /// SizeExpr - An assignment expression. VLA's are only permitted within 934 /// a function block. 935 Stmt *SizeExpr; 936 937 VariableArrayType(QualType et, QualType can, Expr *e, 938 ArraySizeModifier sm, unsigned tq) 939 : ArrayType(VariableArray, et, can, sm, tq), SizeExpr((Stmt*) e) {} 940 friend class ASTContext; // ASTContext creates these. 941 virtual void Destroy(ASTContext& C); 942 943public: 944 Expr *getSizeExpr() const { 945 // We use C-style casts instead of cast<> here because we do not wish 946 // to have a dependency of Type.h on Stmt.h/Expr.h. 947 return (Expr*) SizeExpr; 948 } 949 950 virtual void getAsStringInternal(std::string &InnerString) const; 951 952 static bool classof(const Type *T) { 953 return T->getTypeClass() == VariableArray; 954 } 955 static bool classof(const VariableArrayType *) { return true; } 956 957 friend class StmtIteratorBase; 958 959 void Profile(llvm::FoldingSetNodeID &ID) { 960 assert(0 && "Cannnot unique VariableArrayTypes."); 961 } 962 963protected: 964 virtual void EmitImpl(llvm::Serializer& S) const; 965 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 966 friend class Type; 967}; 968 969/// DependentSizedArrayType - This type represents an array type in 970/// C++ whose size is a value-dependent expression. For example: 971/// @code 972/// template<typename T, int Size> 973/// class array { 974/// T data[Size]; 975/// }; 976/// @endcode 977/// For these types, we won't actually know what the array bound is 978/// until template instantiation occurs, at which point this will 979/// become either a ConstantArrayType or a VariableArrayType. 980class DependentSizedArrayType : public ArrayType { 981 /// SizeExpr - An assignment expression that will instantiate to the 982 /// size of the array. 983 Stmt *SizeExpr; 984 985 DependentSizedArrayType(QualType et, QualType can, Expr *e, 986 ArraySizeModifier sm, unsigned tq) 987 : ArrayType(DependentSizedArray, et, can, sm, tq), SizeExpr((Stmt*) e) {} 988 friend class ASTContext; // ASTContext creates these. 989 virtual void Destroy(ASTContext& C); 990 991public: 992 Expr *getSizeExpr() const { 993 // We use C-style casts instead of cast<> here because we do not wish 994 // to have a dependency of Type.h on Stmt.h/Expr.h. 995 return (Expr*) SizeExpr; 996 } 997 998 virtual void getAsStringInternal(std::string &InnerString) const; 999 1000 static bool classof(const Type *T) { 1001 return T->getTypeClass() == DependentSizedArray; 1002 } 1003 static bool classof(const DependentSizedArrayType *) { return true; } 1004 1005 friend class StmtIteratorBase; 1006 1007 void Profile(llvm::FoldingSetNodeID &ID) { 1008 assert(0 && "Cannnot unique DependentSizedArrayTypes."); 1009 } 1010 1011protected: 1012 virtual void EmitImpl(llvm::Serializer& S) const; 1013 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 1014 friend class Type; 1015}; 1016 1017/// VectorType - GCC generic vector type. This type is created using 1018/// __attribute__((vector_size(n)), where "n" specifies the vector size in 1019/// bytes. Since the constructor takes the number of vector elements, the 1020/// client is responsible for converting the size into the number of elements. 1021class VectorType : public Type, public llvm::FoldingSetNode { 1022protected: 1023 /// ElementType - The element type of the vector. 1024 QualType ElementType; 1025 1026 /// NumElements - The number of elements in the vector. 1027 unsigned NumElements; 1028 1029 VectorType(QualType vecType, unsigned nElements, QualType canonType) : 1030 Type(Vector, canonType, vecType->isDependentType()), 1031 ElementType(vecType), NumElements(nElements) {} 1032 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 1033 QualType canonType) 1034 : Type(tc, canonType, vecType->isDependentType()), ElementType(vecType), 1035 NumElements(nElements) {} 1036 friend class ASTContext; // ASTContext creates these. 1037public: 1038 1039 QualType getElementType() const { return ElementType; } 1040 unsigned getNumElements() const { return NumElements; } 1041 1042 virtual void getAsStringInternal(std::string &InnerString) const; 1043 1044 void Profile(llvm::FoldingSetNodeID &ID) { 1045 Profile(ID, getElementType(), getNumElements(), getTypeClass()); 1046 } 1047 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 1048 unsigned NumElements, TypeClass TypeClass) { 1049 ID.AddPointer(ElementType.getAsOpaquePtr()); 1050 ID.AddInteger(NumElements); 1051 ID.AddInteger(TypeClass); 1052 } 1053 static bool classof(const Type *T) { 1054 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 1055 } 1056 static bool classof(const VectorType *) { return true; } 1057}; 1058 1059/// ExtVectorType - Extended vector type. This type is created using 1060/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 1061/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 1062/// class enables syntactic extensions, like Vector Components for accessing 1063/// points, colors, and textures (modeled after OpenGL Shading Language). 1064class ExtVectorType : public VectorType { 1065 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 1066 VectorType(ExtVector, vecType, nElements, canonType) {} 1067 friend class ASTContext; // ASTContext creates these. 1068public: 1069 static int getPointAccessorIdx(char c) { 1070 switch (c) { 1071 default: return -1; 1072 case 'x': return 0; 1073 case 'y': return 1; 1074 case 'z': return 2; 1075 case 'w': return 3; 1076 } 1077 } 1078 static int getNumericAccessorIdx(char c) { 1079 switch (c) { 1080 default: return -1; 1081 case '0': return 0; 1082 case '1': return 1; 1083 case '2': return 2; 1084 case '3': return 3; 1085 case '4': return 4; 1086 case '5': return 5; 1087 case '6': return 6; 1088 case '7': return 7; 1089 case '8': return 8; 1090 case '9': return 9; 1091 case 'a': return 10; 1092 case 'b': return 11; 1093 case 'c': return 12; 1094 case 'd': return 13; 1095 case 'e': return 14; 1096 case 'f': return 15; 1097 } 1098 } 1099 1100 static int getAccessorIdx(char c) { 1101 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 1102 return getNumericAccessorIdx(c); 1103 } 1104 1105 bool isAccessorWithinNumElements(char c) const { 1106 if (int idx = getAccessorIdx(c)+1) 1107 return unsigned(idx-1) < NumElements; 1108 return false; 1109 } 1110 virtual void getAsStringInternal(std::string &InnerString) const; 1111 1112 static bool classof(const Type *T) { 1113 return T->getTypeClass() == ExtVector; 1114 } 1115 static bool classof(const ExtVectorType *) { return true; } 1116}; 1117 1118/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 1119/// class of FunctionNoProtoType and FunctionProtoType. 1120/// 1121class FunctionType : public Type { 1122 /// SubClassData - This field is owned by the subclass, put here to pack 1123 /// tightly with the ivars in Type. 1124 bool SubClassData : 1; 1125 1126 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1127 /// other bitfields. 1128 /// The qualifiers are part of FunctionProtoType because... 1129 /// 1130 /// C++ 8.3.5p4: The return type, the parameter type list and the 1131 /// cv-qualifier-seq, [...], are part of the function type. 1132 /// 1133 unsigned TypeQuals : 3; 1134 1135 // The type returned by the function. 1136 QualType ResultType; 1137protected: 1138 FunctionType(TypeClass tc, QualType res, bool SubclassInfo, 1139 unsigned typeQuals, QualType Canonical, bool Dependent) 1140 : Type(tc, Canonical, Dependent), 1141 SubClassData(SubclassInfo), TypeQuals(typeQuals), ResultType(res) {} 1142 bool getSubClassData() const { return SubClassData; } 1143 unsigned getTypeQuals() const { return TypeQuals; } 1144public: 1145 1146 QualType getResultType() const { return ResultType; } 1147 1148 1149 static bool classof(const Type *T) { 1150 return T->getTypeClass() == FunctionNoProto || 1151 T->getTypeClass() == FunctionProto; 1152 } 1153 static bool classof(const FunctionType *) { return true; } 1154}; 1155 1156/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 1157/// no information available about its arguments. 1158class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 1159 FunctionNoProtoType(QualType Result, QualType Canonical) 1160 : FunctionType(FunctionNoProto, Result, false, 0, Canonical, 1161 /*Dependent=*/false) {} 1162 friend class ASTContext; // ASTContext creates these. 1163public: 1164 // No additional state past what FunctionType provides. 1165 1166 virtual void getAsStringInternal(std::string &InnerString) const; 1167 1168 void Profile(llvm::FoldingSetNodeID &ID) { 1169 Profile(ID, getResultType()); 1170 } 1171 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType) { 1172 ID.AddPointer(ResultType.getAsOpaquePtr()); 1173 } 1174 1175 static bool classof(const Type *T) { 1176 return T->getTypeClass() == FunctionNoProto; 1177 } 1178 static bool classof(const FunctionNoProtoType *) { return true; } 1179 1180protected: 1181 virtual void EmitImpl(llvm::Serializer& S) const; 1182 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 1183 friend class Type; 1184}; 1185 1186/// FunctionProtoType - Represents a prototype with argument type info, e.g. 1187/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 1188/// arguments, not as having a single void argument. 1189class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 1190 /// hasAnyDependentType - Determine whether there are any dependent 1191 /// types within the arguments passed in. 1192 static bool hasAnyDependentType(const QualType *ArgArray, unsigned numArgs) { 1193 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 1194 if (ArgArray[Idx]->isDependentType()) 1195 return true; 1196 1197 return false; 1198 } 1199 1200 FunctionProtoType(QualType Result, const QualType *ArgArray, unsigned numArgs, 1201 bool isVariadic, unsigned typeQuals, QualType Canonical) 1202 : FunctionType(FunctionProto, Result, isVariadic, typeQuals, Canonical, 1203 (Result->isDependentType() || 1204 hasAnyDependentType(ArgArray, numArgs))), 1205 NumArgs(numArgs) { 1206 // Fill in the trailing argument array. 1207 QualType *ArgInfo = reinterpret_cast<QualType *>(this+1);; 1208 for (unsigned i = 0; i != numArgs; ++i) 1209 ArgInfo[i] = ArgArray[i]; 1210 } 1211 1212 /// NumArgs - The number of arguments this function has, not counting '...'. 1213 unsigned NumArgs; 1214 1215 /// ArgInfo - There is an variable size array after the class in memory that 1216 /// holds the argument types. 1217 1218 friend class ASTContext; // ASTContext creates these. 1219 1220public: 1221 unsigned getNumArgs() const { return NumArgs; } 1222 QualType getArgType(unsigned i) const { 1223 assert(i < NumArgs && "Invalid argument number!"); 1224 return arg_type_begin()[i]; 1225 } 1226 1227 bool isVariadic() const { return getSubClassData(); } 1228 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 1229 1230 typedef const QualType *arg_type_iterator; 1231 arg_type_iterator arg_type_begin() const { 1232 return reinterpret_cast<const QualType *>(this+1); 1233 } 1234 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 1235 1236 virtual void getAsStringInternal(std::string &InnerString) const; 1237 1238 static bool classof(const Type *T) { 1239 return T->getTypeClass() == FunctionProto; 1240 } 1241 static bool classof(const FunctionProtoType *) { return true; } 1242 1243 void Profile(llvm::FoldingSetNodeID &ID); 1244 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 1245 arg_type_iterator ArgTys, unsigned NumArgs, 1246 bool isVariadic, unsigned TypeQuals); 1247 1248protected: 1249 virtual void EmitImpl(llvm::Serializer& S) const; 1250 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 1251 friend class Type; 1252}; 1253 1254 1255class TypedefType : public Type { 1256 TypedefDecl *Decl; 1257protected: 1258 TypedefType(TypeClass tc, TypedefDecl *D, QualType can) 1259 : Type(tc, can, can->isDependentType()), Decl(D) { 1260 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1261 } 1262 friend class ASTContext; // ASTContext creates these. 1263public: 1264 1265 TypedefDecl *getDecl() const { return Decl; } 1266 1267 /// LookThroughTypedefs - Return the ultimate type this typedef corresponds to 1268 /// potentially looking through *all* consecutive typedefs. This returns the 1269 /// sum of the type qualifiers, so if you have: 1270 /// typedef const int A; 1271 /// typedef volatile A B; 1272 /// looking through the typedefs for B will give you "const volatile A". 1273 QualType LookThroughTypedefs() const; 1274 1275 virtual void getAsStringInternal(std::string &InnerString) const; 1276 1277 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 1278 static bool classof(const TypedefType *) { return true; } 1279 1280protected: 1281 virtual void EmitImpl(llvm::Serializer& S) const; 1282 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 1283 friend class Type; 1284}; 1285 1286/// TypeOfExprType (GCC extension). 1287class TypeOfExprType : public Type { 1288 Expr *TOExpr; 1289 TypeOfExprType(Expr *E, QualType can); 1290 friend class ASTContext; // ASTContext creates these. 1291public: 1292 Expr *getUnderlyingExpr() const { return TOExpr; } 1293 1294 virtual void getAsStringInternal(std::string &InnerString) const; 1295 1296 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 1297 static bool classof(const TypeOfExprType *) { return true; } 1298 1299protected: 1300 virtual void EmitImpl(llvm::Serializer& S) const; 1301 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 1302 friend class Type; 1303}; 1304 1305/// TypeOfType (GCC extension). 1306class TypeOfType : public Type { 1307 QualType TOType; 1308 TypeOfType(QualType T, QualType can) 1309 : Type(TypeOf, can, T->isDependentType()), TOType(T) { 1310 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1311 } 1312 friend class ASTContext; // ASTContext creates these. 1313public: 1314 QualType getUnderlyingType() const { return TOType; } 1315 1316 virtual void getAsStringInternal(std::string &InnerString) const; 1317 1318 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 1319 static bool classof(const TypeOfType *) { return true; } 1320 1321protected: 1322 virtual void EmitImpl(llvm::Serializer& S) const; 1323 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 1324 friend class Type; 1325}; 1326 1327class TagType : public Type { 1328 /// Stores the TagDecl associated with this type. The decl will 1329 /// point to the TagDecl that actually defines the entity (or is a 1330 /// definition in progress), if there is such a definition. The 1331 /// single-bit value will be non-zero when this tag is in the 1332 /// process of being defined. 1333 mutable llvm::PointerIntPair<TagDecl *, 1> decl; 1334 friend class ASTContext; 1335 friend class TagDecl; 1336 1337protected: 1338 // FIXME: We'll need the user to pass in information about whether 1339 // this type is dependent or not, because we don't have enough 1340 // information to compute it here. 1341 TagType(TypeClass TC, TagDecl *D, QualType can) 1342 : Type(TC, can, /*Dependent=*/false), decl(D, 0) {} 1343 1344public: 1345 TagDecl *getDecl() const { return decl.getPointer(); } 1346 1347 /// @brief Determines whether this type is in the process of being 1348 /// defined. 1349 bool isBeingDefined() const { return decl.getInt(); } 1350 void setBeingDefined(bool Def) { decl.setInt(Def? 1 : 0); } 1351 1352 virtual void getAsStringInternal(std::string &InnerString) const; 1353 1354 static bool classof(const Type *T) { 1355 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 1356 } 1357 static bool classof(const TagType *) { return true; } 1358 static bool classof(const RecordType *) { return true; } 1359 static bool classof(const EnumType *) { return true; } 1360 1361protected: 1362 virtual void EmitImpl(llvm::Serializer& S) const; 1363 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 1364 friend class Type; 1365}; 1366 1367/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 1368/// to detect TagType objects of structs/unions/classes. 1369class RecordType : public TagType { 1370protected: 1371 explicit RecordType(RecordDecl *D) 1372 : TagType(Record, reinterpret_cast<TagDecl*>(D), QualType()) { } 1373 explicit RecordType(TypeClass TC, RecordDecl *D) 1374 : TagType(TC, reinterpret_cast<TagDecl*>(D), QualType()) { } 1375 friend class ASTContext; // ASTContext creates these. 1376public: 1377 1378 RecordDecl *getDecl() const { 1379 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 1380 } 1381 1382 // FIXME: This predicate is a helper to QualType/Type. It needs to 1383 // recursively check all fields for const-ness. If any field is declared 1384 // const, it needs to return false. 1385 bool hasConstFields() const { return false; } 1386 1387 // FIXME: RecordType needs to check when it is created that all fields are in 1388 // the same address space, and return that. 1389 unsigned getAddressSpace() const { return 0; } 1390 1391 static bool classof(const TagType *T); 1392 static bool classof(const Type *T) { 1393 return isa<TagType>(T) && classof(cast<TagType>(T)); 1394 } 1395 static bool classof(const RecordType *) { return true; } 1396}; 1397 1398/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 1399/// to detect TagType objects of enums. 1400class EnumType : public TagType { 1401 explicit EnumType(EnumDecl *D) 1402 : TagType(Enum, reinterpret_cast<TagDecl*>(D), QualType()) { } 1403 friend class ASTContext; // ASTContext creates these. 1404public: 1405 1406 EnumDecl *getDecl() const { 1407 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 1408 } 1409 1410 static bool classof(const TagType *T); 1411 static bool classof(const Type *T) { 1412 return isa<TagType>(T) && classof(cast<TagType>(T)); 1413 } 1414 static bool classof(const EnumType *) { return true; } 1415}; 1416 1417class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 1418 unsigned Depth : 16; 1419 unsigned Index : 16; 1420 IdentifierInfo *Name; 1421 1422 TemplateTypeParmType(unsigned D, unsigned I, IdentifierInfo *N, 1423 QualType Canon) 1424 : Type(TemplateTypeParm, Canon, /*Dependent=*/true), 1425 Depth(D), Index(I), Name(N) { } 1426 1427 TemplateTypeParmType(unsigned D, unsigned I) 1428 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true), 1429 Depth(D), Index(I), Name(0) { } 1430 1431 friend class ASTContext; // ASTContext creates these 1432 1433public: 1434 unsigned getDepth() const { return Depth; } 1435 unsigned getIndex() const { return Index; } 1436 IdentifierInfo *getName() const { return Name; } 1437 1438 virtual void getAsStringInternal(std::string &InnerString) const; 1439 1440 void Profile(llvm::FoldingSetNodeID &ID) { 1441 Profile(ID, Depth, Index, Name); 1442 } 1443 1444 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 1445 unsigned Index, IdentifierInfo *Name) { 1446 ID.AddInteger(Depth); 1447 ID.AddInteger(Index); 1448 ID.AddPointer(Name); 1449 } 1450 1451 static bool classof(const Type *T) { 1452 return T->getTypeClass() == TemplateTypeParm; 1453 } 1454 static bool classof(const TemplateTypeParmType *T) { return true; } 1455 1456protected: 1457 virtual void EmitImpl(llvm::Serializer& S) const; 1458 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 1459 friend class Type; 1460}; 1461 1462/// \brief Represents the type of a class template specialization as 1463/// written in the source code. 1464/// 1465/// Class template specialization types represent the syntactic form 1466/// of a template-id that refers to a type, e.g., @c vector<int>. All 1467/// class template specialization types are syntactic sugar, whose 1468/// canonical type will point to some other type node that represents 1469/// the instantiation or class template specialization. For example, a 1470/// class template specialization type of @c vector<int> will refer to 1471/// a tag type for the instantiation 1472/// @c std::vector<int, std::allocator<int>>. 1473class ClassTemplateSpecializationType 1474 : public Type, public llvm::FoldingSetNode { 1475 1476 // FIXME: Do we want templates to have a representation in the type 1477 // system? It will probably help with dependent templates and 1478 // possibly with template-names preceded by a nested-name-specifier. 1479 TemplateDecl *Template; 1480 1481 /// \brief - The number of template arguments named in this class 1482 /// template specialization. 1483 unsigned NumArgs; 1484 1485 ClassTemplateSpecializationType(TemplateDecl *T, 1486 const TemplateArgument *Args, 1487 unsigned NumArgs, QualType Canon); 1488 1489 virtual void Destroy(ASTContext& C); 1490 1491 friend class ASTContext; // ASTContext creates these 1492 1493public: 1494 /// \brief Determine whether any of the given template arguments are 1495 /// dependent. 1496 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 1497 unsigned NumArgs); 1498 1499 /// \brief Print a template argument list, including the '<' and '>' 1500 /// enclosing the template arguments. 1501 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 1502 unsigned NumArgs); 1503 1504 typedef const TemplateArgument * iterator; 1505 1506 iterator begin() const { return getArgs(); } 1507 iterator end() const; 1508 1509 /// \brief Retrieve the template that we are specializing. 1510 TemplateDecl *getTemplate() const { return Template; } 1511 1512 /// \brief Retrieve the template arguments. 1513 const TemplateArgument *getArgs() const { 1514 return reinterpret_cast<const TemplateArgument *>(this + 1); 1515 } 1516 1517 /// \brief Retrieve the number of template arguments. 1518 unsigned getNumArgs() const { return NumArgs; } 1519 1520 /// \brief Retrieve a specific template argument as a type. 1521 /// \precondition @c isArgType(Arg) 1522 const TemplateArgument &getArg(unsigned Idx) const; 1523 1524 virtual void getAsStringInternal(std::string &InnerString) const; 1525 1526 void Profile(llvm::FoldingSetNodeID &ID) { 1527 Profile(ID, Template, getArgs(), NumArgs); 1528 } 1529 1530 static void Profile(llvm::FoldingSetNodeID &ID, TemplateDecl *T, 1531 const TemplateArgument *Args, unsigned NumArgs); 1532 1533 static bool classof(const Type *T) { 1534 return T->getTypeClass() == ClassTemplateSpecialization; 1535 } 1536 static bool classof(const ClassTemplateSpecializationType *T) { return true; } 1537 1538protected: 1539 virtual void EmitImpl(llvm::Serializer& S) const; 1540 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 1541 friend class Type; 1542}; 1543 1544/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 1545/// object oriented design. They basically correspond to C++ classes. There 1546/// are two kinds of interface types, normal interfaces like "NSString" and 1547/// qualified interfaces, which are qualified with a protocol list like 1548/// "NSString<NSCopyable, NSAmazing>". Qualified interface types are instances 1549/// of ObjCQualifiedInterfaceType, which is a subclass of ObjCInterfaceType. 1550class ObjCInterfaceType : public Type { 1551 ObjCInterfaceDecl *Decl; 1552protected: 1553 ObjCInterfaceType(TypeClass tc, ObjCInterfaceDecl *D) : 1554 Type(tc, QualType(), /*Dependent=*/false), Decl(D) { } 1555 friend class ASTContext; // ASTContext creates these. 1556public: 1557 1558 ObjCInterfaceDecl *getDecl() const { return Decl; } 1559 1560 /// qual_iterator and friends: this provides access to the (potentially empty) 1561 /// list of protocols qualifying this interface. If this is an instance of 1562 /// ObjCQualifiedInterfaceType it returns the list, otherwise it returns an 1563 /// empty list if there are no qualifying protocols. 1564 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 1565 inline qual_iterator qual_begin() const; 1566 inline qual_iterator qual_end() const; 1567 bool qual_empty() const { return getTypeClass() != ObjCQualifiedInterface; } 1568 1569 /// getNumProtocols - Return the number of qualifying protocols in this 1570 /// interface type, or 0 if there are none. 1571 inline unsigned getNumProtocols() const; 1572 1573 /// getProtocol - Return the specified qualifying protocol. 1574 inline ObjCProtocolDecl *getProtocol(unsigned i) const; 1575 1576 1577 virtual void getAsStringInternal(std::string &InnerString) const; 1578 static bool classof(const Type *T) { 1579 return T->getTypeClass() == ObjCInterface || 1580 T->getTypeClass() == ObjCQualifiedInterface; 1581 } 1582 static bool classof(const ObjCInterfaceType *) { return true; } 1583}; 1584 1585/// ObjCQualifiedInterfaceType - This class represents interface types 1586/// conforming to a list of protocols, such as INTF<Proto1, Proto2, Proto1>. 1587/// 1588/// Duplicate protocols are removed and protocol list is canonicalized to be in 1589/// alphabetical order. 1590class ObjCQualifiedInterfaceType : public ObjCInterfaceType, 1591 public llvm::FoldingSetNode { 1592 1593 // List of protocols for this protocol conforming object type 1594 // List is sorted on protocol name. No protocol is enterred more than once. 1595 llvm::SmallVector<ObjCProtocolDecl*, 4> Protocols; 1596 1597 ObjCQualifiedInterfaceType(ObjCInterfaceDecl *D, 1598 ObjCProtocolDecl **Protos, unsigned NumP) : 1599 ObjCInterfaceType(ObjCQualifiedInterface, D), 1600 Protocols(Protos, Protos+NumP) { } 1601 friend class ASTContext; // ASTContext creates these. 1602public: 1603 1604 ObjCProtocolDecl *getProtocol(unsigned i) const { 1605 return Protocols[i]; 1606 } 1607 unsigned getNumProtocols() const { 1608 return Protocols.size(); 1609 } 1610 1611 qual_iterator qual_begin() const { return Protocols.begin(); } 1612 qual_iterator qual_end() const { return Protocols.end(); } 1613 1614 virtual void getAsStringInternal(std::string &InnerString) const; 1615 1616 void Profile(llvm::FoldingSetNodeID &ID); 1617 static void Profile(llvm::FoldingSetNodeID &ID, 1618 const ObjCInterfaceDecl *Decl, 1619 ObjCProtocolDecl **protocols, unsigned NumProtocols); 1620 1621 static bool classof(const Type *T) { 1622 return T->getTypeClass() == ObjCQualifiedInterface; 1623 } 1624 static bool classof(const ObjCQualifiedInterfaceType *) { return true; } 1625}; 1626 1627inline ObjCInterfaceType::qual_iterator ObjCInterfaceType::qual_begin() const { 1628 if (const ObjCQualifiedInterfaceType *QIT = 1629 dyn_cast<ObjCQualifiedInterfaceType>(this)) 1630 return QIT->qual_begin(); 1631 return 0; 1632} 1633inline ObjCInterfaceType::qual_iterator ObjCInterfaceType::qual_end() const { 1634 if (const ObjCQualifiedInterfaceType *QIT = 1635 dyn_cast<ObjCQualifiedInterfaceType>(this)) 1636 return QIT->qual_end(); 1637 return 0; 1638} 1639 1640/// getNumProtocols - Return the number of qualifying protocols in this 1641/// interface type, or 0 if there are none. 1642inline unsigned ObjCInterfaceType::getNumProtocols() const { 1643 if (const ObjCQualifiedInterfaceType *QIT = 1644 dyn_cast<ObjCQualifiedInterfaceType>(this)) 1645 return QIT->getNumProtocols(); 1646 return 0; 1647} 1648 1649/// getProtocol - Return the specified qualifying protocol. 1650inline ObjCProtocolDecl *ObjCInterfaceType::getProtocol(unsigned i) const { 1651 return cast<ObjCQualifiedInterfaceType>(this)->getProtocol(i); 1652} 1653 1654 1655 1656/// ObjCQualifiedIdType - to represent id<protocol-list>. 1657/// 1658/// Duplicate protocols are removed and protocol list is canonicalized to be in 1659/// alphabetical order. 1660class ObjCQualifiedIdType : public Type, 1661 public llvm::FoldingSetNode { 1662 // List of protocols for this protocol conforming 'id' type 1663 // List is sorted on protocol name. No protocol is enterred more than once. 1664 llvm::SmallVector<ObjCProtocolDecl*, 8> Protocols; 1665 1666 ObjCQualifiedIdType(ObjCProtocolDecl **Protos, unsigned NumP) 1667 : Type(ObjCQualifiedId, QualType()/*these are always canonical*/, 1668 /*Dependent=*/false), 1669 Protocols(Protos, Protos+NumP) { } 1670 friend class ASTContext; // ASTContext creates these. 1671public: 1672 1673 ObjCProtocolDecl *getProtocols(unsigned i) const { 1674 return Protocols[i]; 1675 } 1676 unsigned getNumProtocols() const { 1677 return Protocols.size(); 1678 } 1679 ObjCProtocolDecl **getReferencedProtocols() { 1680 return &Protocols[0]; 1681 } 1682 1683 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 1684 qual_iterator qual_begin() const { return Protocols.begin(); } 1685 qual_iterator qual_end() const { return Protocols.end(); } 1686 1687 virtual void getAsStringInternal(std::string &InnerString) const; 1688 1689 void Profile(llvm::FoldingSetNodeID &ID); 1690 static void Profile(llvm::FoldingSetNodeID &ID, 1691 ObjCProtocolDecl **protocols, unsigned NumProtocols); 1692 1693 static bool classof(const Type *T) { 1694 return T->getTypeClass() == ObjCQualifiedId; 1695 } 1696 static bool classof(const ObjCQualifiedIdType *) { return true; } 1697 1698}; 1699 1700/// ObjCQualifiedClassType - to represent Class<protocol-list>. 1701/// 1702/// Duplicate protocols are removed and protocol list is canonicalized to be in 1703/// alphabetical order. 1704class ObjCQualifiedClassType : public Type, 1705 public llvm::FoldingSetNode { 1706 // List of protocols for this protocol conforming 'id' type 1707 // List is sorted on protocol name. No protocol is enterred more than once. 1708 llvm::SmallVector<ObjCProtocolDecl*, 8> Protocols; 1709 1710 ObjCQualifiedClassType(ObjCProtocolDecl **Protos, unsigned NumP) 1711 : Type(ObjCQualifiedClass, QualType()/*these are always canonical*/, 1712 /*Dependent=*/false), 1713 Protocols(Protos, Protos+NumP) { } 1714 friend class ASTContext; // ASTContext creates these. 1715public: 1716 1717 ObjCProtocolDecl *getProtocols(unsigned i) const { 1718 return Protocols[i]; 1719 } 1720 unsigned getNumProtocols() const { 1721 return Protocols.size(); 1722 } 1723 ObjCProtocolDecl **getReferencedProtocols() { 1724 return &Protocols[0]; 1725 } 1726 1727 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 1728 qual_iterator qual_begin() const { return Protocols.begin(); } 1729 qual_iterator qual_end() const { return Protocols.end(); } 1730 1731 virtual void getAsStringInternal(std::string &InnerString) const; 1732 1733 void Profile(llvm::FoldingSetNodeID &ID); 1734 static void Profile(llvm::FoldingSetNodeID &ID, 1735 ObjCProtocolDecl **protocols, unsigned NumProtocols); 1736 1737 static bool classof(const Type *T) { 1738 return T->getTypeClass() == ObjCQualifiedClass; 1739 } 1740 static bool classof(const ObjCQualifiedClassType *) { return true; } 1741 1742}; 1743 1744// Inline function definitions. 1745 1746/// getUnqualifiedType - Return the type without any qualifiers. 1747inline QualType QualType::getUnqualifiedType() const { 1748 Type *TP = getTypePtr(); 1749 if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(TP)) 1750 TP = EXTQT->getBaseType(); 1751 return QualType(TP, 0); 1752} 1753 1754/// getAddressSpace - Return the address space of this type. 1755inline unsigned QualType::getAddressSpace() const { 1756 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 1757 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 1758 return AT->getElementType().getAddressSpace(); 1759 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 1760 return RT->getAddressSpace(); 1761 if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(CT)) 1762 return EXTQT->getAddressSpace(); 1763 return 0; 1764} 1765 1766/// getObjCGCAttr - Return the gc attribute of this type. 1767inline QualType::GCAttrTypes QualType::getObjCGCAttr() const { 1768 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 1769 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 1770 return AT->getElementType().getObjCGCAttr(); 1771 if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(CT)) 1772 return EXTQT->getObjCGCAttr(); 1773 if (const PointerType *PT = CT->getAsPointerType()) 1774 return PT->getPointeeType().getObjCGCAttr(); 1775 return GCNone; 1776} 1777 1778/// isMoreQualifiedThan - Determine whether this type is more 1779/// qualified than the Other type. For example, "const volatile int" 1780/// is more qualified than "const int", "volatile int", and 1781/// "int". However, it is not more qualified than "const volatile 1782/// int". 1783inline bool QualType::isMoreQualifiedThan(QualType Other) const { 1784 // FIXME: Handle address spaces 1785 unsigned MyQuals = this->getCVRQualifiers(); 1786 unsigned OtherQuals = Other.getCVRQualifiers(); 1787 assert(this->getAddressSpace() == 0 && "Address space not checked"); 1788 assert(Other.getAddressSpace() == 0 && "Address space not checked"); 1789 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 1790} 1791 1792/// isAtLeastAsQualifiedAs - Determine whether this type is at last 1793/// as qualified as the Other type. For example, "const volatile 1794/// int" is at least as qualified as "const int", "volatile int", 1795/// "int", and "const volatile int". 1796inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 1797 // FIXME: Handle address spaces 1798 unsigned MyQuals = this->getCVRQualifiers(); 1799 unsigned OtherQuals = Other.getCVRQualifiers(); 1800 assert(this->getAddressSpace() == 0 && "Address space not checked"); 1801 assert(Other.getAddressSpace() == 0 && "Address space not checked"); 1802 return (MyQuals | OtherQuals) == MyQuals; 1803} 1804 1805/// getNonReferenceType - If Type is a reference type (e.g., const 1806/// int&), returns the type that the reference refers to ("const 1807/// int"). Otherwise, returns the type itself. This routine is used 1808/// throughout Sema to implement C++ 5p6: 1809/// 1810/// If an expression initially has the type "reference to T" (8.3.2, 1811/// 8.5.3), the type is adjusted to "T" prior to any further 1812/// analysis, the expression designates the object or function 1813/// denoted by the reference, and the expression is an lvalue. 1814inline QualType QualType::getNonReferenceType() const { 1815 if (const ReferenceType *RefType = (*this)->getAsReferenceType()) 1816 return RefType->getPointeeType(); 1817 else 1818 return *this; 1819} 1820 1821inline const TypedefType* Type::getAsTypedefType() const { 1822 return dyn_cast<TypedefType>(this); 1823} 1824inline const ObjCInterfaceType *Type::getAsPointerToObjCInterfaceType() const { 1825 if (const PointerType *PT = getAsPointerType()) 1826 return PT->getPointeeType()->getAsObjCInterfaceType(); 1827 return 0; 1828} 1829 1830// NOTE: All of these methods use "getUnqualifiedType" to strip off address 1831// space qualifiers if present. 1832inline bool Type::isFunctionType() const { 1833 return isa<FunctionType>(CanonicalType.getUnqualifiedType()); 1834} 1835inline bool Type::isPointerType() const { 1836 return isa<PointerType>(CanonicalType.getUnqualifiedType()); 1837} 1838inline bool Type::isBlockPointerType() const { 1839 return isa<BlockPointerType>(CanonicalType); 1840} 1841inline bool Type::isReferenceType() const { 1842 return isa<ReferenceType>(CanonicalType.getUnqualifiedType()); 1843} 1844inline bool Type::isLValueReferenceType() const { 1845 return isa<LValueReferenceType>(CanonicalType.getUnqualifiedType()); 1846} 1847inline bool Type::isRValueReferenceType() const { 1848 return isa<RValueReferenceType>(CanonicalType.getUnqualifiedType()); 1849} 1850inline bool Type::isFunctionPointerType() const { 1851 if (const PointerType* T = getAsPointerType()) 1852 return T->getPointeeType()->isFunctionType(); 1853 else 1854 return false; 1855} 1856inline bool Type::isMemberPointerType() const { 1857 return isa<MemberPointerType>(CanonicalType.getUnqualifiedType()); 1858} 1859inline bool Type::isMemberFunctionPointerType() const { 1860 if (const MemberPointerType* T = getAsMemberPointerType()) 1861 return T->getPointeeType()->isFunctionType(); 1862 else 1863 return false; 1864} 1865inline bool Type::isArrayType() const { 1866 return isa<ArrayType>(CanonicalType.getUnqualifiedType()); 1867} 1868inline bool Type::isConstantArrayType() const { 1869 return isa<ConstantArrayType>(CanonicalType.getUnqualifiedType()); 1870} 1871inline bool Type::isIncompleteArrayType() const { 1872 return isa<IncompleteArrayType>(CanonicalType.getUnqualifiedType()); 1873} 1874inline bool Type::isVariableArrayType() const { 1875 return isa<VariableArrayType>(CanonicalType.getUnqualifiedType()); 1876} 1877inline bool Type::isDependentSizedArrayType() const { 1878 return isa<DependentSizedArrayType>(CanonicalType.getUnqualifiedType()); 1879} 1880inline bool Type::isRecordType() const { 1881 return isa<RecordType>(CanonicalType.getUnqualifiedType()); 1882} 1883inline bool Type::isAnyComplexType() const { 1884 return isa<ComplexType>(CanonicalType.getUnqualifiedType()); 1885} 1886inline bool Type::isVectorType() const { 1887 return isa<VectorType>(CanonicalType.getUnqualifiedType()); 1888} 1889inline bool Type::isExtVectorType() const { 1890 return isa<ExtVectorType>(CanonicalType.getUnqualifiedType()); 1891} 1892inline bool Type::isObjCInterfaceType() const { 1893 return isa<ObjCInterfaceType>(CanonicalType.getUnqualifiedType()); 1894} 1895inline bool Type::isObjCQualifiedInterfaceType() const { 1896 return isa<ObjCQualifiedInterfaceType>(CanonicalType.getUnqualifiedType()); 1897} 1898inline bool Type::isObjCQualifiedIdType() const { 1899 return isa<ObjCQualifiedIdType>(CanonicalType.getUnqualifiedType()); 1900} 1901inline bool Type::isTemplateTypeParmType() const { 1902 return isa<TemplateTypeParmType>(CanonicalType.getUnqualifiedType()); 1903} 1904 1905inline bool Type::isSpecificBuiltinType(unsigned K) const { 1906 if (const BuiltinType *BT = getAsBuiltinType()) 1907 if (BT->getKind() == (BuiltinType::Kind) K) 1908 return true; 1909 return false; 1910} 1911 1912/// \brief Determines whether this is a type for which one can define 1913/// an overloaded operator. 1914inline bool Type::isOverloadableType() const { 1915 return isDependentType() || isRecordType() || isEnumeralType(); 1916} 1917 1918inline bool Type::hasPointerRepresentation() const { 1919 return (isPointerType() || isReferenceType() || isBlockPointerType() || 1920 isObjCInterfaceType() || isObjCQualifiedIdType() || 1921 isObjCQualifiedInterfaceType()); 1922} 1923 1924inline bool Type::hasObjCPointerRepresentation() const { 1925 return (isObjCInterfaceType() || isObjCQualifiedIdType() || 1926 isObjCQualifiedInterfaceType()); 1927} 1928 1929/// Insertion operator for diagnostics. This allows sending QualType's into a 1930/// diagnostic with <<. 1931inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 1932 QualType T) { 1933 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 1934 Diagnostic::ak_qualtype); 1935 return DB; 1936} 1937 1938} // end namespace clang 1939 1940#endif 1941