Type.h revision da0c4d26ecb98b02a0f22bde39a1a45dbc2f6d3f
1//===--- Type.h - C Language Family Type Representation ---------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Type interface and subclasses. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_CLANG_AST_TYPE_H 15#define LLVM_CLANG_AST_TYPE_H 16 17#include "clang/Basic/Diagnostic.h" 18#include "clang/Basic/IdentifierTable.h" 19#include "clang/AST/NestedNameSpecifier.h" 20#include "clang/AST/TemplateName.h" 21#include "llvm/Support/Casting.h" 22#include "llvm/ADT/APSInt.h" 23#include "llvm/ADT/FoldingSet.h" 24#include "llvm/ADT/PointerIntPair.h" 25#include "llvm/ADT/PointerUnion.h" 26#include "llvm/Bitcode/SerializationFwd.h" 27 28using llvm::isa; 29using llvm::cast; 30using llvm::cast_or_null; 31using llvm::dyn_cast; 32using llvm::dyn_cast_or_null; 33 34namespace llvm { 35 template <typename T> 36 class PointerLikeTypeTraits; 37} 38 39namespace clang { 40 class ASTContext; 41 class Type; 42 class TypedefDecl; 43 class TemplateDecl; 44 class TemplateTypeParmDecl; 45 class NonTypeTemplateParmDecl; 46 class TemplateTemplateParmDecl; 47 class TagDecl; 48 class RecordDecl; 49 class CXXRecordDecl; 50 class EnumDecl; 51 class FieldDecl; 52 class ObjCInterfaceDecl; 53 class ObjCProtocolDecl; 54 class ObjCMethodDecl; 55 class Expr; 56 class Stmt; 57 class SourceLocation; 58 class StmtIteratorBase; 59 class TemplateArgument; 60 class QualifiedNameType; 61 62 // Provide forward declarations for all of the *Type classes 63#define TYPE(Class, Base) class Class##Type; 64#include "clang/AST/TypeNodes.def" 65 66/// QualType - For efficiency, we don't store CVR-qualified types as nodes on 67/// their own: instead each reference to a type stores the qualifiers. This 68/// greatly reduces the number of nodes we need to allocate for types (for 69/// example we only need one for 'int', 'const int', 'volatile int', 70/// 'const volatile int', etc). 71/// 72/// As an added efficiency bonus, instead of making this a pair, we just store 73/// the three bits we care about in the low bits of the pointer. To handle the 74/// packing/unpacking, we make QualType be a simple wrapper class that acts like 75/// a smart pointer. 76class QualType { 77 llvm::PointerIntPair<Type*, 3> Value; 78public: 79 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 80 Const = 0x1, 81 Restrict = 0x2, 82 Volatile = 0x4, 83 CVRFlags = Const|Restrict|Volatile 84 }; 85 86 enum GCAttrTypes { 87 GCNone = 0, 88 Weak, 89 Strong 90 }; 91 92 QualType() {} 93 94 QualType(const Type *Ptr, unsigned Quals) 95 : Value(const_cast<Type*>(Ptr), Quals) {} 96 97 unsigned getCVRQualifiers() const { return Value.getInt(); } 98 void setCVRQualifiers(unsigned Quals) { Value.setInt(Quals); } 99 Type *getTypePtr() const { return Value.getPointer(); } 100 101 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 102 static QualType getFromOpaquePtr(void *Ptr) { 103 QualType T; 104 T.Value.setFromOpaqueValue(Ptr); 105 return T; 106 } 107 108 Type &operator*() const { 109 return *getTypePtr(); 110 } 111 112 Type *operator->() const { 113 return getTypePtr(); 114 } 115 116 /// isNull - Return true if this QualType doesn't point to a type yet. 117 bool isNull() const { 118 return getTypePtr() == 0; 119 } 120 121 bool isConstQualified() const { 122 return (getCVRQualifiers() & Const) ? true : false; 123 } 124 bool isVolatileQualified() const { 125 return (getCVRQualifiers() & Volatile) ? true : false; 126 } 127 bool isRestrictQualified() const { 128 return (getCVRQualifiers() & Restrict) ? true : false; 129 } 130 131 bool isConstant(ASTContext& Ctx) const; 132 133 /// addConst/addVolatile/addRestrict - add the specified type qual to this 134 /// QualType. 135 void addConst() { Value.setInt(Value.getInt() | Const); } 136 void addVolatile() { Value.setInt(Value.getInt() | Volatile); } 137 void addRestrict() { Value.setInt(Value.getInt() | Restrict); } 138 139 void removeConst() { Value.setInt(Value.getInt() & ~Const); } 140 void removeVolatile() { Value.setInt(Value.getInt() & ~Volatile); } 141 void removeRestrict() { Value.setInt(Value.getInt() & ~Restrict); } 142 143 QualType getQualifiedType(unsigned TQs) const { 144 return QualType(getTypePtr(), TQs); 145 } 146 QualType getWithAdditionalQualifiers(unsigned TQs) const { 147 return QualType(getTypePtr(), TQs|getCVRQualifiers()); 148 } 149 150 QualType withConst() const { return getWithAdditionalQualifiers(Const); } 151 QualType withVolatile() const { return getWithAdditionalQualifiers(Volatile);} 152 QualType withRestrict() const { return getWithAdditionalQualifiers(Restrict);} 153 154 QualType getUnqualifiedType() const; 155 bool isMoreQualifiedThan(QualType Other) const; 156 bool isAtLeastAsQualifiedAs(QualType Other) const; 157 QualType getNonReferenceType() const; 158 159 /// getDesugaredType - Return the specified type with any "sugar" removed from 160 /// the type. This takes off typedefs, typeof's etc. If the outer level of 161 /// the type is already concrete, it returns it unmodified. This is similar 162 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 163 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 164 /// concrete. 165 QualType getDesugaredType(bool ForDisplay = false) const; 166 167 /// operator==/!= - Indicate whether the specified types and qualifiers are 168 /// identical. 169 bool operator==(const QualType &RHS) const { 170 return Value == RHS.Value; 171 } 172 bool operator!=(const QualType &RHS) const { 173 return Value != RHS.Value; 174 } 175 std::string getAsString() const { 176 std::string S; 177 getAsStringInternal(S); 178 return S; 179 } 180 void getAsStringInternal(std::string &Str) const; 181 182 void dump(const char *s) const; 183 void dump() const; 184 185 void Profile(llvm::FoldingSetNodeID &ID) const { 186 ID.AddPointer(getAsOpaquePtr()); 187 } 188 189public: 190 191 /// getAddressSpace - Return the address space of this type. 192 inline unsigned getAddressSpace() const; 193 194 /// GCAttrTypesAttr - Returns gc attribute of this type. 195 inline QualType::GCAttrTypes getObjCGCAttr() const; 196 197 /// isObjCGCWeak true when Type is objc's weak. 198 bool isObjCGCWeak() const { 199 return getObjCGCAttr() == Weak; 200 } 201 202 /// isObjCGCStrong true when Type is objc's strong. 203 bool isObjCGCStrong() const { 204 return getObjCGCAttr() == Strong; 205 } 206 207 /// Emit - Serialize a QualType to Bitcode. 208 void Emit(llvm::Serializer& S) const; 209 210 /// Read - Deserialize a QualType from Bitcode. 211 static QualType ReadVal(llvm::Deserializer& D); 212 213 void ReadBackpatch(llvm::Deserializer& D); 214}; 215 216} // end clang. 217 218namespace llvm { 219/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 220/// to a specific Type class. 221template<> struct simplify_type<const ::clang::QualType> { 222 typedef ::clang::Type* SimpleType; 223 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 224 return Val.getTypePtr(); 225 } 226}; 227template<> struct simplify_type< ::clang::QualType> 228 : public simplify_type<const ::clang::QualType> {}; 229 230// Teach SmallPtrSet that QualType is "basically a pointer". 231template<> 232class PointerLikeTypeTraits<clang::QualType> { 233public: 234 static inline void *getAsVoidPointer(clang::QualType P) { 235 return P.getAsOpaquePtr(); 236 } 237 static inline clang::QualType getFromVoidPointer(void *P) { 238 return clang::QualType::getFromOpaquePtr(P); 239 } 240 // CVR qualifiers go in low bits. 241 enum { NumLowBitsAvailable = 0 }; 242}; 243} // end namespace llvm 244 245namespace clang { 246 247/// Type - This is the base class of the type hierarchy. A central concept 248/// with types is that each type always has a canonical type. A canonical type 249/// is the type with any typedef names stripped out of it or the types it 250/// references. For example, consider: 251/// 252/// typedef int foo; 253/// typedef foo* bar; 254/// 'int *' 'foo *' 'bar' 255/// 256/// There will be a Type object created for 'int'. Since int is canonical, its 257/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 258/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 259/// there is a PointerType that represents 'int*', which, like 'int', is 260/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 261/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 262/// is also 'int*'. 263/// 264/// Non-canonical types are useful for emitting diagnostics, without losing 265/// information about typedefs being used. Canonical types are useful for type 266/// comparisons (they allow by-pointer equality tests) and useful for reasoning 267/// about whether something has a particular form (e.g. is a function type), 268/// because they implicitly, recursively, strip all typedefs out of a type. 269/// 270/// Types, once created, are immutable. 271/// 272class Type { 273public: 274 enum TypeClass { 275#define TYPE(Class, Base) Class, 276#define ABSTRACT_TYPE(Class, Base) 277#include "clang/AST/TypeNodes.def" 278 TagFirst = Record, TagLast = Enum 279 }; 280 281private: 282 QualType CanonicalType; 283 284 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 285 bool Dependent : 1; 286 287 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 288 /// Note that this should stay at the end of the ivars for Type so that 289 /// subclasses can pack their bitfields into the same word. 290 unsigned TC : 5; 291 292 Type(const Type&); // DO NOT IMPLEMENT. 293 void operator=(const Type&); // DO NOT IMPLEMENT. 294protected: 295 // silence VC++ warning C4355: 'this' : used in base member initializer list 296 Type *this_() { return this; } 297 Type(TypeClass tc, QualType Canonical, bool dependent) 298 : CanonicalType(Canonical.isNull() ? QualType(this_(), 0) : Canonical), 299 Dependent(dependent), TC(tc) {} 300 virtual ~Type() {} 301 virtual void Destroy(ASTContext& C); 302 friend class ASTContext; 303 304 void EmitTypeInternal(llvm::Serializer& S) const; 305 void ReadTypeInternal(llvm::Deserializer& D); 306 307public: 308 TypeClass getTypeClass() const { return static_cast<TypeClass>(TC); } 309 310 bool isCanonical() const { return CanonicalType.getTypePtr() == this; } 311 312 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 313 /// object types, function types, and incomplete types. 314 315 /// \brief Determines whether the type describes an object in memory. 316 /// 317 /// Note that this definition of object type corresponds to the C++ 318 /// definition of object type, which includes incomplete types, as 319 /// opposed to the C definition (which does not include incomplete 320 /// types). 321 bool isObjectType() const; 322 323 /// isIncompleteType - Return true if this is an incomplete type. 324 /// A type that can describe objects, but which lacks information needed to 325 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 326 /// routine will need to determine if the size is actually required. 327 bool isIncompleteType() const; 328 329 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 330 /// type, in other words, not a function type. 331 bool isIncompleteOrObjectType() const { 332 return !isFunctionType(); 333 } 334 335 /// isPODType - Return true if this is a plain-old-data type (C++ 3.9p10). 336 bool isPODType() const; 337 338 /// isVariablyModifiedType (C99 6.7.5.2p2) - Return true for variable array 339 /// types that have a non-constant expression. This does not include "[]". 340 bool isVariablyModifiedType() const; 341 342 /// Helper methods to distinguish type categories. All type predicates 343 /// operate on the canonical type, ignoring typedefs and qualifiers. 344 345 /// isSpecificBuiltinType - Test for a particular builtin type. 346 bool isSpecificBuiltinType(unsigned K) const; 347 348 /// isIntegerType() does *not* include complex integers (a GCC extension). 349 /// isComplexIntegerType() can be used to test for complex integers. 350 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 351 bool isEnumeralType() const; 352 bool isBooleanType() const; 353 bool isCharType() const; 354 bool isWideCharType() const; 355 bool isIntegralType() const; 356 357 /// Floating point categories. 358 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 359 /// isComplexType() does *not* include complex integers (a GCC extension). 360 /// isComplexIntegerType() can be used to test for complex integers. 361 bool isComplexType() const; // C99 6.2.5p11 (complex) 362 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 363 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 364 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 365 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 366 bool isVoidType() const; // C99 6.2.5p19 367 bool isDerivedType() const; // C99 6.2.5p20 368 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 369 bool isAggregateType() const; 370 371 // Type Predicates: Check to see if this type is structurally the specified 372 // type, ignoring typedefs and qualifiers. 373 bool isFunctionType() const; 374 bool isFunctionNoProtoType() const { return getAsFunctionNoProtoType() != 0; } 375 bool isFunctionProtoType() const { return getAsFunctionProtoType() != 0; } 376 bool isPointerType() const; 377 bool isBlockPointerType() const; 378 bool isReferenceType() const; 379 bool isLValueReferenceType() const; 380 bool isRValueReferenceType() const; 381 bool isFunctionPointerType() const; 382 bool isMemberPointerType() const; 383 bool isMemberFunctionPointerType() const; 384 bool isArrayType() const; 385 bool isConstantArrayType() const; 386 bool isIncompleteArrayType() const; 387 bool isVariableArrayType() const; 388 bool isDependentSizedArrayType() const; 389 bool isRecordType() const; 390 bool isClassType() const; 391 bool isStructureType() const; 392 bool isUnionType() const; 393 bool isComplexIntegerType() const; // GCC _Complex integer type. 394 bool isVectorType() const; // GCC vector type. 395 bool isExtVectorType() const; // Extended vector type. 396 bool isObjCInterfaceType() const; // NSString or NSString<foo> 397 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 398 bool isObjCQualifiedIdType() const; // id<foo> 399 bool isTemplateTypeParmType() const; // C++ template type parameter 400 401 /// isDependentType - Whether this type is a dependent type, meaning 402 /// that its definition somehow depends on a template parameter 403 /// (C++ [temp.dep.type]). 404 bool isDependentType() const { return Dependent; } 405 bool isOverloadableType() const; 406 407 /// hasPointerRepresentation - Whether this type is represented 408 /// natively as a pointer; this includes pointers, references, block 409 /// pointers, and Objective-C interface, qualified id, and qualified 410 /// interface types. 411 bool hasPointerRepresentation() const; 412 413 /// hasObjCPointerRepresentation - Whether this type can represent 414 /// an objective pointer type for the purpose of GC'ability 415 bool hasObjCPointerRepresentation() const; 416 417 // Type Checking Functions: Check to see if this type is structurally the 418 // specified type, ignoring typedefs and qualifiers, and return a pointer to 419 // the best type we can. 420 const BuiltinType *getAsBuiltinType() const; 421 const FunctionType *getAsFunctionType() const; 422 const FunctionNoProtoType *getAsFunctionNoProtoType() const; 423 const FunctionProtoType *getAsFunctionProtoType() const; 424 const PointerType *getAsPointerType() const; 425 const BlockPointerType *getAsBlockPointerType() const; 426 const ReferenceType *getAsReferenceType() const; 427 const LValueReferenceType *getAsLValueReferenceType() const; 428 const RValueReferenceType *getAsRValueReferenceType() const; 429 const MemberPointerType *getAsMemberPointerType() const; 430 const TagType *getAsTagType() const; 431 const RecordType *getAsRecordType() const; 432 const RecordType *getAsStructureType() const; 433 /// NOTE: getAs*ArrayType are methods on ASTContext. 434 const TypedefType *getAsTypedefType() const; 435 const RecordType *getAsUnionType() const; 436 const EnumType *getAsEnumType() const; 437 const VectorType *getAsVectorType() const; // GCC vector type. 438 const ComplexType *getAsComplexType() const; 439 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 440 const ExtVectorType *getAsExtVectorType() const; // Extended vector type. 441 const ObjCInterfaceType *getAsObjCInterfaceType() const; 442 const ObjCQualifiedInterfaceType *getAsObjCQualifiedInterfaceType() const; 443 const ObjCQualifiedIdType *getAsObjCQualifiedIdType() const; 444 const TemplateTypeParmType *getAsTemplateTypeParmType() const; 445 446 const TemplateSpecializationType * 447 getAsTemplateSpecializationType() const; 448 449 /// getAsPointerToObjCInterfaceType - If this is a pointer to an ObjC 450 /// interface, return the interface type, otherwise return null. 451 const ObjCInterfaceType *getAsPointerToObjCInterfaceType() const; 452 453 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 454 /// element type of the array, potentially with type qualifiers missing. 455 /// This method should never be used when type qualifiers are meaningful. 456 const Type *getArrayElementTypeNoTypeQual() const; 457 458 /// getDesugaredType - Return the specified type with any "sugar" removed from 459 /// the type. This takes off typedefs, typeof's etc. If the outer level of 460 /// the type is already concrete, it returns it unmodified. This is similar 461 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 462 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 463 /// concrete. 464 QualType getDesugaredType(bool ForDisplay = false) const; 465 466 /// More type predicates useful for type checking/promotion 467 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 468 469 /// isSignedIntegerType - Return true if this is an integer type that is 470 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 471 /// an enum decl which has a signed representation, or a vector of signed 472 /// integer element type. 473 bool isSignedIntegerType() const; 474 475 /// isUnsignedIntegerType - Return true if this is an integer type that is 476 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 477 /// decl which has an unsigned representation, or a vector of unsigned integer 478 /// element type. 479 bool isUnsignedIntegerType() const; 480 481 /// isConstantSizeType - Return true if this is not a variable sized type, 482 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 483 /// incomplete types. 484 bool isConstantSizeType() const; 485 486 QualType getCanonicalTypeInternal() const { return CanonicalType; } 487 void dump() const; 488 virtual void getAsStringInternal(std::string &InnerString) const = 0; 489 static bool classof(const Type *) { return true; } 490 491protected: 492 /// Emit - Emit a Type to bitcode. Used by ASTContext. 493 void Emit(llvm::Serializer& S) const; 494 495 /// Create - Construct a Type from bitcode. Used by ASTContext. 496 static void Create(ASTContext& Context, unsigned i, llvm::Deserializer& S); 497 498 /// EmitImpl - Subclasses must implement this method in order to 499 /// be serialized. 500 // FIXME: Make this abstract once implemented. 501 virtual void EmitImpl(llvm::Serializer& S) const { 502 assert(false && "Serialization for type not supported."); 503 } 504}; 505 506/// ExtQualType - TR18037 (C embedded extensions) 6.2.5p26 507/// This supports all kinds of type attributes; including, 508/// address space qualified types, objective-c's __weak and 509/// __strong attributes. 510/// 511class ExtQualType : public Type, public llvm::FoldingSetNode { 512 /// BaseType - This is the underlying type that this qualifies. All CVR 513 /// qualifiers are stored on the QualType that references this type, so we 514 /// can't have any here. 515 Type *BaseType; 516 517 /// Address Space ID - The address space ID this type is qualified with. 518 unsigned AddressSpace; 519 /// GC __weak/__strong attributes 520 QualType::GCAttrTypes GCAttrType; 521 522 ExtQualType(Type *Base, QualType CanonicalPtr, unsigned AddrSpace, 523 QualType::GCAttrTypes gcAttr) : 524 Type(ExtQual, CanonicalPtr, Base->isDependentType()), BaseType(Base), 525 AddressSpace(AddrSpace), GCAttrType(gcAttr) { 526 assert(!isa<ExtQualType>(BaseType) && 527 "Cannot have ExtQualType of ExtQualType"); 528 } 529 friend class ASTContext; // ASTContext creates these. 530public: 531 Type *getBaseType() const { return BaseType; } 532 QualType::GCAttrTypes getObjCGCAttr() const { return GCAttrType; } 533 unsigned getAddressSpace() const { return AddressSpace; } 534 535 virtual void getAsStringInternal(std::string &InnerString) const; 536 537 void Profile(llvm::FoldingSetNodeID &ID) { 538 Profile(ID, getBaseType(), AddressSpace, GCAttrType); 539 } 540 static void Profile(llvm::FoldingSetNodeID &ID, Type *Base, 541 unsigned AddrSpace, QualType::GCAttrTypes gcAttr) { 542 ID.AddPointer(Base); 543 ID.AddInteger(AddrSpace); 544 ID.AddInteger(gcAttr); 545 } 546 547 static bool classof(const Type *T) { return T->getTypeClass() == ExtQual; } 548 static bool classof(const ExtQualType *) { return true; } 549 550protected: 551 virtual void EmitImpl(llvm::Serializer& S) const; 552 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 553 friend class Type; 554}; 555 556 557/// BuiltinType - This class is used for builtin types like 'int'. Builtin 558/// types are always canonical and have a literal name field. 559class BuiltinType : public Type { 560public: 561 enum Kind { 562 Void, 563 564 Bool, // This is bool and/or _Bool. 565 Char_U, // This is 'char' for targets where char is unsigned. 566 UChar, // This is explicitly qualified unsigned char. 567 UShort, 568 UInt, 569 ULong, 570 ULongLong, 571 572 Char_S, // This is 'char' for targets where char is signed. 573 SChar, // This is explicitly qualified signed char. 574 WChar, // This is 'wchar_t' for C++. 575 Short, 576 Int, 577 Long, 578 LongLong, 579 580 Float, Double, LongDouble, 581 582 Overload, // This represents the type of an overloaded function declaration. 583 Dependent // This represents the type of a type-dependent expression. 584 }; 585private: 586 Kind TypeKind; 587public: 588 BuiltinType(Kind K) 589 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent)), 590 TypeKind(K) {} 591 592 Kind getKind() const { return TypeKind; } 593 const char *getName() const; 594 595 virtual void getAsStringInternal(std::string &InnerString) const; 596 597 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 598 static bool classof(const BuiltinType *) { return true; } 599}; 600 601/// FixedWidthIntType - Used for arbitrary width types that we either don't 602/// want to or can't map to named integer types. These always have a lower 603/// integer rank than builtin types of the same width. 604class FixedWidthIntType : public Type { 605private: 606 unsigned Width; 607 bool Signed; 608public: 609 FixedWidthIntType(unsigned W, bool S) : Type(FixedWidthInt, QualType(), false), 610 Width(W), Signed(S) {} 611 612 unsigned getWidth() const { return Width; } 613 bool isSigned() const { return Signed; } 614 const char *getName() const; 615 616 virtual void getAsStringInternal(std::string &InnerString) const; 617 618 static bool classof(const Type *T) { return T->getTypeClass() == FixedWidthInt; } 619 static bool classof(const FixedWidthIntType *) { return true; } 620}; 621 622/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 623/// types (_Complex float etc) as well as the GCC integer complex extensions. 624/// 625class ComplexType : public Type, public llvm::FoldingSetNode { 626 QualType ElementType; 627 ComplexType(QualType Element, QualType CanonicalPtr) : 628 Type(Complex, CanonicalPtr, Element->isDependentType()), 629 ElementType(Element) { 630 } 631 friend class ASTContext; // ASTContext creates these. 632public: 633 QualType getElementType() const { return ElementType; } 634 635 virtual void getAsStringInternal(std::string &InnerString) const; 636 637 void Profile(llvm::FoldingSetNodeID &ID) { 638 Profile(ID, getElementType()); 639 } 640 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 641 ID.AddPointer(Element.getAsOpaquePtr()); 642 } 643 644 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 645 static bool classof(const ComplexType *) { return true; } 646 647protected: 648 virtual void EmitImpl(llvm::Serializer& S) const; 649 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 650 friend class Type; 651}; 652 653/// PointerType - C99 6.7.5.1 - Pointer Declarators. 654/// 655class PointerType : public Type, public llvm::FoldingSetNode { 656 QualType PointeeType; 657 658 PointerType(QualType Pointee, QualType CanonicalPtr) : 659 Type(Pointer, CanonicalPtr, Pointee->isDependentType()), PointeeType(Pointee) { 660 } 661 friend class ASTContext; // ASTContext creates these. 662public: 663 664 virtual void getAsStringInternal(std::string &InnerString) const; 665 666 QualType getPointeeType() const { return PointeeType; } 667 668 void Profile(llvm::FoldingSetNodeID &ID) { 669 Profile(ID, getPointeeType()); 670 } 671 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 672 ID.AddPointer(Pointee.getAsOpaquePtr()); 673 } 674 675 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 676 static bool classof(const PointerType *) { return true; } 677 678protected: 679 virtual void EmitImpl(llvm::Serializer& S) const; 680 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 681 friend class Type; 682}; 683 684/// BlockPointerType - pointer to a block type. 685/// This type is to represent types syntactically represented as 686/// "void (^)(int)", etc. Pointee is required to always be a function type. 687/// 688class BlockPointerType : public Type, public llvm::FoldingSetNode { 689 QualType PointeeType; // Block is some kind of pointer type 690 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 691 Type(BlockPointer, CanonicalCls, Pointee->isDependentType()), 692 PointeeType(Pointee) { 693 } 694 friend class ASTContext; // ASTContext creates these. 695public: 696 697 // Get the pointee type. Pointee is required to always be a function type. 698 QualType getPointeeType() const { return PointeeType; } 699 700 virtual void getAsStringInternal(std::string &InnerString) const; 701 702 void Profile(llvm::FoldingSetNodeID &ID) { 703 Profile(ID, getPointeeType()); 704 } 705 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 706 ID.AddPointer(Pointee.getAsOpaquePtr()); 707 } 708 709 static bool classof(const Type *T) { 710 return T->getTypeClass() == BlockPointer; 711 } 712 static bool classof(const BlockPointerType *) { return true; } 713 714 protected: 715 virtual void EmitImpl(llvm::Serializer& S) const; 716 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 717 friend class Type; 718}; 719 720/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 721/// 722class ReferenceType : public Type, public llvm::FoldingSetNode { 723 QualType PointeeType; 724 725protected: 726 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef) : 727 Type(tc, CanonicalRef, Referencee->isDependentType()), 728 PointeeType(Referencee) { 729 } 730public: 731 QualType getPointeeType() const { return PointeeType; } 732 733 void Profile(llvm::FoldingSetNodeID &ID) { 734 Profile(ID, getPointeeType()); 735 } 736 static void Profile(llvm::FoldingSetNodeID &ID, QualType Referencee) { 737 ID.AddPointer(Referencee.getAsOpaquePtr()); 738 } 739 740 static bool classof(const Type *T) { 741 return T->getTypeClass() == LValueReference || 742 T->getTypeClass() == RValueReference; 743 } 744 static bool classof(const ReferenceType *) { return true; } 745 746protected: 747 virtual void EmitImpl(llvm::Serializer& S) const; 748}; 749 750/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 751/// 752class LValueReferenceType : public ReferenceType { 753 LValueReferenceType(QualType Referencee, QualType CanonicalRef) : 754 ReferenceType(LValueReference, Referencee, CanonicalRef) { 755 } 756 friend class ASTContext; // ASTContext creates these 757public: 758 virtual void getAsStringInternal(std::string &InnerString) const; 759 760 static bool classof(const Type *T) { 761 return T->getTypeClass() == LValueReference; 762 } 763 static bool classof(const LValueReferenceType *) { return true; } 764 765protected: 766 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 767 friend class Type; 768}; 769 770/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 771/// 772class RValueReferenceType : public ReferenceType { 773 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 774 ReferenceType(RValueReference, Referencee, CanonicalRef) { 775 } 776 friend class ASTContext; // ASTContext creates these 777public: 778 virtual void getAsStringInternal(std::string &InnerString) const; 779 780 static bool classof(const Type *T) { 781 return T->getTypeClass() == RValueReference; 782 } 783 static bool classof(const RValueReferenceType *) { return true; } 784 785protected: 786 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 787 friend class Type; 788}; 789 790/// MemberPointerType - C++ 8.3.3 - Pointers to members 791/// 792class MemberPointerType : public Type, public llvm::FoldingSetNode { 793 QualType PointeeType; 794 /// The class of which the pointee is a member. Must ultimately be a 795 /// RecordType, but could be a typedef or a template parameter too. 796 const Type *Class; 797 798 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 799 Type(MemberPointer, CanonicalPtr, 800 Cls->isDependentType() || Pointee->isDependentType()), 801 PointeeType(Pointee), Class(Cls) { 802 } 803 friend class ASTContext; // ASTContext creates these. 804public: 805 806 QualType getPointeeType() const { return PointeeType; } 807 808 const Type *getClass() const { return Class; } 809 810 virtual void getAsStringInternal(std::string &InnerString) const; 811 812 void Profile(llvm::FoldingSetNodeID &ID) { 813 Profile(ID, getPointeeType(), getClass()); 814 } 815 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 816 const Type *Class) { 817 ID.AddPointer(Pointee.getAsOpaquePtr()); 818 ID.AddPointer(Class); 819 } 820 821 static bool classof(const Type *T) { 822 return T->getTypeClass() == MemberPointer; 823 } 824 static bool classof(const MemberPointerType *) { return true; } 825 826protected: 827 virtual void EmitImpl(llvm::Serializer& S) const; 828 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 829 friend class Type; 830}; 831 832/// ArrayType - C99 6.7.5.2 - Array Declarators. 833/// 834class ArrayType : public Type, public llvm::FoldingSetNode { 835public: 836 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 837 /// an array with a static size (e.g. int X[static 4]), or an array 838 /// with a star size (e.g. int X[*]). 839 /// 'static' is only allowed on function parameters. 840 enum ArraySizeModifier { 841 Normal, Static, Star 842 }; 843private: 844 /// ElementType - The element type of the array. 845 QualType ElementType; 846 847 // NOTE: VC++ treats enums as signed, avoid using the ArraySizeModifier enum 848 /// NOTE: These fields are packed into the bitfields space in the Type class. 849 unsigned SizeModifier : 2; 850 851 /// IndexTypeQuals - Capture qualifiers in declarations like: 852 /// 'int X[static restrict 4]'. For function parameters only. 853 unsigned IndexTypeQuals : 3; 854 855protected: 856 // C++ [temp.dep.type]p1: 857 // A type is dependent if it is... 858 // - an array type constructed from any dependent type or whose 859 // size is specified by a constant expression that is 860 // value-dependent, 861 ArrayType(TypeClass tc, QualType et, QualType can, 862 ArraySizeModifier sm, unsigned tq) 863 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray), 864 ElementType(et), SizeModifier(sm), IndexTypeQuals(tq) {} 865 866 friend class ASTContext; // ASTContext creates these. 867public: 868 QualType getElementType() const { return ElementType; } 869 ArraySizeModifier getSizeModifier() const { 870 return ArraySizeModifier(SizeModifier); 871 } 872 unsigned getIndexTypeQualifier() const { return IndexTypeQuals; } 873 874 static bool classof(const Type *T) { 875 return T->getTypeClass() == ConstantArray || 876 T->getTypeClass() == VariableArray || 877 T->getTypeClass() == IncompleteArray || 878 T->getTypeClass() == DependentSizedArray; 879 } 880 static bool classof(const ArrayType *) { return true; } 881}; 882 883/// ConstantArrayType - This class represents C arrays with a specified constant 884/// size. For example 'int A[100]' has ConstantArrayType where the element type 885/// is 'int' and the size is 100. 886class ConstantArrayType : public ArrayType { 887 llvm::APInt Size; // Allows us to unique the type. 888 889 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 890 ArraySizeModifier sm, unsigned tq) 891 : ArrayType(ConstantArray, et, can, sm, tq), Size(size) {} 892 friend class ASTContext; // ASTContext creates these. 893public: 894 const llvm::APInt &getSize() const { return Size; } 895 virtual void getAsStringInternal(std::string &InnerString) const; 896 897 void Profile(llvm::FoldingSetNodeID &ID) { 898 Profile(ID, getElementType(), getSize(), 899 getSizeModifier(), getIndexTypeQualifier()); 900 } 901 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 902 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 903 unsigned TypeQuals) { 904 ID.AddPointer(ET.getAsOpaquePtr()); 905 ID.AddInteger(ArraySize.getZExtValue()); 906 ID.AddInteger(SizeMod); 907 ID.AddInteger(TypeQuals); 908 } 909 static bool classof(const Type *T) { 910 return T->getTypeClass() == ConstantArray; 911 } 912 static bool classof(const ConstantArrayType *) { return true; } 913 914protected: 915 virtual void EmitImpl(llvm::Serializer& S) const; 916 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 917 friend class Type; 918}; 919 920/// IncompleteArrayType - This class represents C arrays with an unspecified 921/// size. For example 'int A[]' has an IncompleteArrayType where the element 922/// type is 'int' and the size is unspecified. 923class IncompleteArrayType : public ArrayType { 924 IncompleteArrayType(QualType et, QualType can, 925 ArraySizeModifier sm, unsigned tq) 926 : ArrayType(IncompleteArray, et, can, sm, tq) {} 927 friend class ASTContext; // ASTContext creates these. 928public: 929 930 virtual void getAsStringInternal(std::string &InnerString) const; 931 932 static bool classof(const Type *T) { 933 return T->getTypeClass() == IncompleteArray; 934 } 935 static bool classof(const IncompleteArrayType *) { return true; } 936 937 friend class StmtIteratorBase; 938 939 void Profile(llvm::FoldingSetNodeID &ID) { 940 Profile(ID, getElementType(), getSizeModifier(), getIndexTypeQualifier()); 941 } 942 943 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 944 ArraySizeModifier SizeMod, unsigned TypeQuals) { 945 ID.AddPointer(ET.getAsOpaquePtr()); 946 ID.AddInteger(SizeMod); 947 ID.AddInteger(TypeQuals); 948 } 949 950protected: 951 virtual void EmitImpl(llvm::Serializer& S) const; 952 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 953 friend class Type; 954}; 955 956/// VariableArrayType - This class represents C arrays with a specified size 957/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 958/// Since the size expression is an arbitrary expression, we store it as such. 959/// 960/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 961/// should not be: two lexically equivalent variable array types could mean 962/// different things, for example, these variables do not have the same type 963/// dynamically: 964/// 965/// void foo(int x) { 966/// int Y[x]; 967/// ++x; 968/// int Z[x]; 969/// } 970/// 971class VariableArrayType : public ArrayType { 972 /// SizeExpr - An assignment expression. VLA's are only permitted within 973 /// a function block. 974 Stmt *SizeExpr; 975 976 VariableArrayType(QualType et, QualType can, Expr *e, 977 ArraySizeModifier sm, unsigned tq) 978 : ArrayType(VariableArray, et, can, sm, tq), SizeExpr((Stmt*) e) {} 979 friend class ASTContext; // ASTContext creates these. 980 virtual void Destroy(ASTContext& C); 981 982public: 983 Expr *getSizeExpr() const { 984 // We use C-style casts instead of cast<> here because we do not wish 985 // to have a dependency of Type.h on Stmt.h/Expr.h. 986 return (Expr*) SizeExpr; 987 } 988 989 virtual void getAsStringInternal(std::string &InnerString) const; 990 991 static bool classof(const Type *T) { 992 return T->getTypeClass() == VariableArray; 993 } 994 static bool classof(const VariableArrayType *) { return true; } 995 996 friend class StmtIteratorBase; 997 998 void Profile(llvm::FoldingSetNodeID &ID) { 999 assert(0 && "Cannnot unique VariableArrayTypes."); 1000 } 1001 1002protected: 1003 virtual void EmitImpl(llvm::Serializer& S) const; 1004 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 1005 friend class Type; 1006}; 1007 1008/// DependentSizedArrayType - This type represents an array type in 1009/// C++ whose size is a value-dependent expression. For example: 1010/// @code 1011/// template<typename T, int Size> 1012/// class array { 1013/// T data[Size]; 1014/// }; 1015/// @endcode 1016/// For these types, we won't actually know what the array bound is 1017/// until template instantiation occurs, at which point this will 1018/// become either a ConstantArrayType or a VariableArrayType. 1019class DependentSizedArrayType : public ArrayType { 1020 /// SizeExpr - An assignment expression that will instantiate to the 1021 /// size of the array. 1022 Stmt *SizeExpr; 1023 1024 DependentSizedArrayType(QualType et, QualType can, Expr *e, 1025 ArraySizeModifier sm, unsigned tq) 1026 : ArrayType(DependentSizedArray, et, can, sm, tq), SizeExpr((Stmt*) e) {} 1027 friend class ASTContext; // ASTContext creates these. 1028 virtual void Destroy(ASTContext& C); 1029 1030public: 1031 Expr *getSizeExpr() const { 1032 // We use C-style casts instead of cast<> here because we do not wish 1033 // to have a dependency of Type.h on Stmt.h/Expr.h. 1034 return (Expr*) SizeExpr; 1035 } 1036 1037 virtual void getAsStringInternal(std::string &InnerString) const; 1038 1039 static bool classof(const Type *T) { 1040 return T->getTypeClass() == DependentSizedArray; 1041 } 1042 static bool classof(const DependentSizedArrayType *) { return true; } 1043 1044 friend class StmtIteratorBase; 1045 1046 void Profile(llvm::FoldingSetNodeID &ID) { 1047 assert(0 && "Cannnot unique DependentSizedArrayTypes."); 1048 } 1049 1050protected: 1051 virtual void EmitImpl(llvm::Serializer& S) const; 1052 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 1053 friend class Type; 1054}; 1055 1056/// VectorType - GCC generic vector type. This type is created using 1057/// __attribute__((vector_size(n)), where "n" specifies the vector size in 1058/// bytes. Since the constructor takes the number of vector elements, the 1059/// client is responsible for converting the size into the number of elements. 1060class VectorType : public Type, public llvm::FoldingSetNode { 1061protected: 1062 /// ElementType - The element type of the vector. 1063 QualType ElementType; 1064 1065 /// NumElements - The number of elements in the vector. 1066 unsigned NumElements; 1067 1068 VectorType(QualType vecType, unsigned nElements, QualType canonType) : 1069 Type(Vector, canonType, vecType->isDependentType()), 1070 ElementType(vecType), NumElements(nElements) {} 1071 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 1072 QualType canonType) 1073 : Type(tc, canonType, vecType->isDependentType()), ElementType(vecType), 1074 NumElements(nElements) {} 1075 friend class ASTContext; // ASTContext creates these. 1076public: 1077 1078 QualType getElementType() const { return ElementType; } 1079 unsigned getNumElements() const { return NumElements; } 1080 1081 virtual void getAsStringInternal(std::string &InnerString) const; 1082 1083 void Profile(llvm::FoldingSetNodeID &ID) { 1084 Profile(ID, getElementType(), getNumElements(), getTypeClass()); 1085 } 1086 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 1087 unsigned NumElements, TypeClass TypeClass) { 1088 ID.AddPointer(ElementType.getAsOpaquePtr()); 1089 ID.AddInteger(NumElements); 1090 ID.AddInteger(TypeClass); 1091 } 1092 static bool classof(const Type *T) { 1093 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 1094 } 1095 static bool classof(const VectorType *) { return true; } 1096}; 1097 1098/// ExtVectorType - Extended vector type. This type is created using 1099/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 1100/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 1101/// class enables syntactic extensions, like Vector Components for accessing 1102/// points, colors, and textures (modeled after OpenGL Shading Language). 1103class ExtVectorType : public VectorType { 1104 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 1105 VectorType(ExtVector, vecType, nElements, canonType) {} 1106 friend class ASTContext; // ASTContext creates these. 1107public: 1108 static int getPointAccessorIdx(char c) { 1109 switch (c) { 1110 default: return -1; 1111 case 'x': return 0; 1112 case 'y': return 1; 1113 case 'z': return 2; 1114 case 'w': return 3; 1115 } 1116 } 1117 static int getNumericAccessorIdx(char c) { 1118 switch (c) { 1119 default: return -1; 1120 case '0': return 0; 1121 case '1': return 1; 1122 case '2': return 2; 1123 case '3': return 3; 1124 case '4': return 4; 1125 case '5': return 5; 1126 case '6': return 6; 1127 case '7': return 7; 1128 case '8': return 8; 1129 case '9': return 9; 1130 case 'a': return 10; 1131 case 'b': return 11; 1132 case 'c': return 12; 1133 case 'd': return 13; 1134 case 'e': return 14; 1135 case 'f': return 15; 1136 } 1137 } 1138 1139 static int getAccessorIdx(char c) { 1140 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 1141 return getNumericAccessorIdx(c); 1142 } 1143 1144 bool isAccessorWithinNumElements(char c) const { 1145 if (int idx = getAccessorIdx(c)+1) 1146 return unsigned(idx-1) < NumElements; 1147 return false; 1148 } 1149 virtual void getAsStringInternal(std::string &InnerString) const; 1150 1151 static bool classof(const Type *T) { 1152 return T->getTypeClass() == ExtVector; 1153 } 1154 static bool classof(const ExtVectorType *) { return true; } 1155}; 1156 1157/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 1158/// class of FunctionNoProtoType and FunctionProtoType. 1159/// 1160class FunctionType : public Type { 1161 /// SubClassData - This field is owned by the subclass, put here to pack 1162 /// tightly with the ivars in Type. 1163 bool SubClassData : 1; 1164 1165 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1166 /// other bitfields. 1167 /// The qualifiers are part of FunctionProtoType because... 1168 /// 1169 /// C++ 8.3.5p4: The return type, the parameter type list and the 1170 /// cv-qualifier-seq, [...], are part of the function type. 1171 /// 1172 unsigned TypeQuals : 3; 1173 1174 // The type returned by the function. 1175 QualType ResultType; 1176protected: 1177 FunctionType(TypeClass tc, QualType res, bool SubclassInfo, 1178 unsigned typeQuals, QualType Canonical, bool Dependent) 1179 : Type(tc, Canonical, Dependent), 1180 SubClassData(SubclassInfo), TypeQuals(typeQuals), ResultType(res) {} 1181 bool getSubClassData() const { return SubClassData; } 1182 unsigned getTypeQuals() const { return TypeQuals; } 1183public: 1184 1185 QualType getResultType() const { return ResultType; } 1186 1187 1188 static bool classof(const Type *T) { 1189 return T->getTypeClass() == FunctionNoProto || 1190 T->getTypeClass() == FunctionProto; 1191 } 1192 static bool classof(const FunctionType *) { return true; } 1193}; 1194 1195/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 1196/// no information available about its arguments. 1197class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 1198 FunctionNoProtoType(QualType Result, QualType Canonical) 1199 : FunctionType(FunctionNoProto, Result, false, 0, Canonical, 1200 /*Dependent=*/false) {} 1201 friend class ASTContext; // ASTContext creates these. 1202public: 1203 // No additional state past what FunctionType provides. 1204 1205 virtual void getAsStringInternal(std::string &InnerString) const; 1206 1207 void Profile(llvm::FoldingSetNodeID &ID) { 1208 Profile(ID, getResultType()); 1209 } 1210 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType) { 1211 ID.AddPointer(ResultType.getAsOpaquePtr()); 1212 } 1213 1214 static bool classof(const Type *T) { 1215 return T->getTypeClass() == FunctionNoProto; 1216 } 1217 static bool classof(const FunctionNoProtoType *) { return true; } 1218 1219protected: 1220 virtual void EmitImpl(llvm::Serializer& S) const; 1221 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 1222 friend class Type; 1223}; 1224 1225/// FunctionProtoType - Represents a prototype with argument type info, e.g. 1226/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 1227/// arguments, not as having a single void argument. 1228class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 1229 /// hasAnyDependentType - Determine whether there are any dependent 1230 /// types within the arguments passed in. 1231 static bool hasAnyDependentType(const QualType *ArgArray, unsigned numArgs) { 1232 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 1233 if (ArgArray[Idx]->isDependentType()) 1234 return true; 1235 1236 return false; 1237 } 1238 1239 FunctionProtoType(QualType Result, const QualType *ArgArray, unsigned numArgs, 1240 bool isVariadic, unsigned typeQuals, QualType Canonical) 1241 : FunctionType(FunctionProto, Result, isVariadic, typeQuals, Canonical, 1242 (Result->isDependentType() || 1243 hasAnyDependentType(ArgArray, numArgs))), 1244 NumArgs(numArgs) { 1245 // Fill in the trailing argument array. 1246 QualType *ArgInfo = reinterpret_cast<QualType *>(this+1);; 1247 for (unsigned i = 0; i != numArgs; ++i) 1248 ArgInfo[i] = ArgArray[i]; 1249 } 1250 1251 /// NumArgs - The number of arguments this function has, not counting '...'. 1252 unsigned NumArgs; 1253 1254 /// ArgInfo - There is an variable size array after the class in memory that 1255 /// holds the argument types. 1256 1257 friend class ASTContext; // ASTContext creates these. 1258 1259public: 1260 unsigned getNumArgs() const { return NumArgs; } 1261 QualType getArgType(unsigned i) const { 1262 assert(i < NumArgs && "Invalid argument number!"); 1263 return arg_type_begin()[i]; 1264 } 1265 1266 bool isVariadic() const { return getSubClassData(); } 1267 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 1268 1269 typedef const QualType *arg_type_iterator; 1270 arg_type_iterator arg_type_begin() const { 1271 return reinterpret_cast<const QualType *>(this+1); 1272 } 1273 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 1274 1275 virtual void getAsStringInternal(std::string &InnerString) const; 1276 1277 static bool classof(const Type *T) { 1278 return T->getTypeClass() == FunctionProto; 1279 } 1280 static bool classof(const FunctionProtoType *) { return true; } 1281 1282 void Profile(llvm::FoldingSetNodeID &ID); 1283 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 1284 arg_type_iterator ArgTys, unsigned NumArgs, 1285 bool isVariadic, unsigned TypeQuals); 1286 1287protected: 1288 virtual void EmitImpl(llvm::Serializer& S) const; 1289 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 1290 friend class Type; 1291}; 1292 1293 1294class TypedefType : public Type { 1295 TypedefDecl *Decl; 1296protected: 1297 TypedefType(TypeClass tc, TypedefDecl *D, QualType can) 1298 : Type(tc, can, can->isDependentType()), Decl(D) { 1299 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1300 } 1301 friend class ASTContext; // ASTContext creates these. 1302public: 1303 1304 TypedefDecl *getDecl() const { return Decl; } 1305 1306 /// LookThroughTypedefs - Return the ultimate type this typedef corresponds to 1307 /// potentially looking through *all* consecutive typedefs. This returns the 1308 /// sum of the type qualifiers, so if you have: 1309 /// typedef const int A; 1310 /// typedef volatile A B; 1311 /// looking through the typedefs for B will give you "const volatile A". 1312 QualType LookThroughTypedefs() const; 1313 1314 virtual void getAsStringInternal(std::string &InnerString) const; 1315 1316 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 1317 static bool classof(const TypedefType *) { return true; } 1318 1319protected: 1320 virtual void EmitImpl(llvm::Serializer& S) const; 1321 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 1322 friend class Type; 1323}; 1324 1325/// TypeOfExprType (GCC extension). 1326class TypeOfExprType : public Type { 1327 Expr *TOExpr; 1328 TypeOfExprType(Expr *E, QualType can); 1329 friend class ASTContext; // ASTContext creates these. 1330public: 1331 Expr *getUnderlyingExpr() const { return TOExpr; } 1332 1333 virtual void getAsStringInternal(std::string &InnerString) const; 1334 1335 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 1336 static bool classof(const TypeOfExprType *) { return true; } 1337 1338protected: 1339 virtual void EmitImpl(llvm::Serializer& S) const; 1340 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 1341 friend class Type; 1342}; 1343 1344/// TypeOfType (GCC extension). 1345class TypeOfType : public Type { 1346 QualType TOType; 1347 TypeOfType(QualType T, QualType can) 1348 : Type(TypeOf, can, T->isDependentType()), TOType(T) { 1349 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1350 } 1351 friend class ASTContext; // ASTContext creates these. 1352public: 1353 QualType getUnderlyingType() const { return TOType; } 1354 1355 virtual void getAsStringInternal(std::string &InnerString) const; 1356 1357 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 1358 static bool classof(const TypeOfType *) { return true; } 1359 1360protected: 1361 virtual void EmitImpl(llvm::Serializer& S) const; 1362 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 1363 friend class Type; 1364}; 1365 1366class TagType : public Type { 1367 /// Stores the TagDecl associated with this type. The decl will 1368 /// point to the TagDecl that actually defines the entity (or is a 1369 /// definition in progress), if there is such a definition. The 1370 /// single-bit value will be non-zero when this tag is in the 1371 /// process of being defined. 1372 mutable llvm::PointerIntPair<TagDecl *, 1> decl; 1373 friend class ASTContext; 1374 friend class TagDecl; 1375 1376protected: 1377 // FIXME: We'll need the user to pass in information about whether 1378 // this type is dependent or not, because we don't have enough 1379 // information to compute it here. 1380 TagType(TypeClass TC, TagDecl *D, QualType can) 1381 : Type(TC, can, /*Dependent=*/false), decl(D, 0) {} 1382 1383public: 1384 TagDecl *getDecl() const { return decl.getPointer(); } 1385 1386 /// @brief Determines whether this type is in the process of being 1387 /// defined. 1388 bool isBeingDefined() const { return decl.getInt(); } 1389 void setBeingDefined(bool Def) { decl.setInt(Def? 1 : 0); } 1390 1391 virtual void getAsStringInternal(std::string &InnerString) const; 1392 void getAsStringInternal(std::string &InnerString, 1393 bool SuppressTagKind) const; 1394 1395 static bool classof(const Type *T) { 1396 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 1397 } 1398 static bool classof(const TagType *) { return true; } 1399 static bool classof(const RecordType *) { return true; } 1400 static bool classof(const EnumType *) { return true; } 1401 1402protected: 1403 virtual void EmitImpl(llvm::Serializer& S) const; 1404 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 1405 friend class Type; 1406}; 1407 1408/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 1409/// to detect TagType objects of structs/unions/classes. 1410class RecordType : public TagType { 1411protected: 1412 explicit RecordType(RecordDecl *D) 1413 : TagType(Record, reinterpret_cast<TagDecl*>(D), QualType()) { } 1414 explicit RecordType(TypeClass TC, RecordDecl *D) 1415 : TagType(TC, reinterpret_cast<TagDecl*>(D), QualType()) { } 1416 friend class ASTContext; // ASTContext creates these. 1417public: 1418 1419 RecordDecl *getDecl() const { 1420 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 1421 } 1422 1423 // FIXME: This predicate is a helper to QualType/Type. It needs to 1424 // recursively check all fields for const-ness. If any field is declared 1425 // const, it needs to return false. 1426 bool hasConstFields() const { return false; } 1427 1428 // FIXME: RecordType needs to check when it is created that all fields are in 1429 // the same address space, and return that. 1430 unsigned getAddressSpace() const { return 0; } 1431 1432 static bool classof(const TagType *T); 1433 static bool classof(const Type *T) { 1434 return isa<TagType>(T) && classof(cast<TagType>(T)); 1435 } 1436 static bool classof(const RecordType *) { return true; } 1437}; 1438 1439/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 1440/// to detect TagType objects of enums. 1441class EnumType : public TagType { 1442 explicit EnumType(EnumDecl *D) 1443 : TagType(Enum, reinterpret_cast<TagDecl*>(D), QualType()) { } 1444 friend class ASTContext; // ASTContext creates these. 1445public: 1446 1447 EnumDecl *getDecl() const { 1448 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 1449 } 1450 1451 static bool classof(const TagType *T); 1452 static bool classof(const Type *T) { 1453 return isa<TagType>(T) && classof(cast<TagType>(T)); 1454 } 1455 static bool classof(const EnumType *) { return true; } 1456}; 1457 1458class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 1459 unsigned Depth : 16; 1460 unsigned Index : 16; 1461 IdentifierInfo *Name; 1462 1463 TemplateTypeParmType(unsigned D, unsigned I, IdentifierInfo *N, 1464 QualType Canon) 1465 : Type(TemplateTypeParm, Canon, /*Dependent=*/true), 1466 Depth(D), Index(I), Name(N) { } 1467 1468 TemplateTypeParmType(unsigned D, unsigned I) 1469 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true), 1470 Depth(D), Index(I), Name(0) { } 1471 1472 friend class ASTContext; // ASTContext creates these 1473 1474public: 1475 unsigned getDepth() const { return Depth; } 1476 unsigned getIndex() const { return Index; } 1477 IdentifierInfo *getName() const { return Name; } 1478 1479 virtual void getAsStringInternal(std::string &InnerString) const; 1480 1481 void Profile(llvm::FoldingSetNodeID &ID) { 1482 Profile(ID, Depth, Index, Name); 1483 } 1484 1485 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 1486 unsigned Index, IdentifierInfo *Name) { 1487 ID.AddInteger(Depth); 1488 ID.AddInteger(Index); 1489 ID.AddPointer(Name); 1490 } 1491 1492 static bool classof(const Type *T) { 1493 return T->getTypeClass() == TemplateTypeParm; 1494 } 1495 static bool classof(const TemplateTypeParmType *T) { return true; } 1496 1497protected: 1498 virtual void EmitImpl(llvm::Serializer& S) const; 1499 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 1500 friend class Type; 1501}; 1502 1503/// \brief Represents the type of a template specialization as written 1504/// in the source code. 1505/// 1506/// Template specialization types represent the syntactic form of a 1507/// template-id that refers to a type, e.g., @c vector<int>. Some 1508/// template specialization types are syntactic sugar, whose canonical 1509/// type will point to some other type node that represents the 1510/// instantiation or class template specialization. For example, a 1511/// class template specialization type of @c vector<int> will refer to 1512/// a tag type for the instantiation 1513/// @c std::vector<int, std::allocator<int>>. 1514/// 1515/// Other template specialization types, for which the template name 1516/// is dependent, may be canonical types. These types are always 1517/// dependent. 1518class TemplateSpecializationType 1519 : public Type, public llvm::FoldingSetNode { 1520 1521 /// \brief The name of the template being specialized. 1522 TemplateName Template; 1523 1524 /// \brief - The number of template arguments named in this class 1525 /// template specialization. 1526 unsigned NumArgs; 1527 1528 TemplateSpecializationType(TemplateName T, 1529 const TemplateArgument *Args, 1530 unsigned NumArgs, QualType Canon); 1531 1532 virtual void Destroy(ASTContext& C); 1533 1534 friend class ASTContext; // ASTContext creates these 1535 1536public: 1537 /// \brief Determine whether any of the given template arguments are 1538 /// dependent. 1539 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 1540 unsigned NumArgs); 1541 1542 /// \brief Print a template argument list, including the '<' and '>' 1543 /// enclosing the template arguments. 1544 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 1545 unsigned NumArgs); 1546 1547 typedef const TemplateArgument * iterator; 1548 1549 iterator begin() const { return getArgs(); } 1550 iterator end() const; 1551 1552 /// \brief Retrieve the name of the template that we are specializing. 1553 TemplateName getTemplateName() const { return Template; } 1554 1555 /// \brief Retrieve the template arguments. 1556 const TemplateArgument *getArgs() const { 1557 return reinterpret_cast<const TemplateArgument *>(this + 1); 1558 } 1559 1560 /// \brief Retrieve the number of template arguments. 1561 unsigned getNumArgs() const { return NumArgs; } 1562 1563 /// \brief Retrieve a specific template argument as a type. 1564 /// \precondition @c isArgType(Arg) 1565 const TemplateArgument &getArg(unsigned Idx) const; 1566 1567 virtual void getAsStringInternal(std::string &InnerString) const; 1568 1569 void Profile(llvm::FoldingSetNodeID &ID) { 1570 Profile(ID, Template, getArgs(), NumArgs); 1571 } 1572 1573 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 1574 const TemplateArgument *Args, unsigned NumArgs); 1575 1576 static bool classof(const Type *T) { 1577 return T->getTypeClass() == TemplateSpecialization; 1578 } 1579 static bool classof(const TemplateSpecializationType *T) { return true; } 1580 1581protected: 1582 virtual void EmitImpl(llvm::Serializer& S) const; 1583 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 1584 friend class Type; 1585}; 1586 1587/// \brief Represents a type that was referred to via a qualified 1588/// name, e.g., N::M::type. 1589/// 1590/// This type is used to keep track of a type name as written in the 1591/// source code, including any nested-name-specifiers. The type itself 1592/// is always "sugar", used to express what was written in the source 1593/// code but containing no additional semantic information. 1594class QualifiedNameType : public Type, public llvm::FoldingSetNode { 1595 /// \brief The nested name specifier containing the qualifier. 1596 NestedNameSpecifier *NNS; 1597 1598 /// \brief The type that this qualified name refers to. 1599 QualType NamedType; 1600 1601 QualifiedNameType(NestedNameSpecifier *NNS, QualType NamedType, 1602 QualType CanonType) 1603 : Type(QualifiedName, CanonType, NamedType->isDependentType()), 1604 NNS(NNS), NamedType(NamedType) { } 1605 1606 friend class ASTContext; // ASTContext creates these 1607 1608public: 1609 /// \brief Retrieve the qualification on this type. 1610 NestedNameSpecifier *getQualifier() const { return NNS; } 1611 1612 /// \brief Retrieve the type named by the qualified-id. 1613 QualType getNamedType() const { return NamedType; } 1614 1615 virtual void getAsStringInternal(std::string &InnerString) const; 1616 1617 void Profile(llvm::FoldingSetNodeID &ID) { 1618 Profile(ID, NNS, NamedType); 1619 } 1620 1621 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 1622 QualType NamedType) { 1623 ID.AddPointer(NNS); 1624 NamedType.Profile(ID); 1625 } 1626 1627 static bool classof(const Type *T) { 1628 return T->getTypeClass() == QualifiedName; 1629 } 1630 static bool classof(const QualifiedNameType *T) { return true; } 1631 1632protected: 1633 virtual void EmitImpl(llvm::Serializer& S) const; 1634 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 1635 friend class Type; 1636}; 1637 1638/// \brief Represents a 'typename' specifier that names a type within 1639/// a dependent type, e.g., "typename T::type". 1640/// 1641/// TypenameType has a very similar structure to QualifiedNameType, 1642/// which also involves a nested-name-specifier following by a type, 1643/// and (FIXME!) both can even be prefixed by the 'typename' 1644/// keyword. However, the two types serve very different roles: 1645/// QualifiedNameType is a non-semantic type that serves only as sugar 1646/// to show how a particular type was written in the source 1647/// code. TypenameType, on the other hand, only occurs when the 1648/// nested-name-specifier is dependent, such that we cannot resolve 1649/// the actual type until after instantiation. 1650class TypenameType : public Type, public llvm::FoldingSetNode { 1651 /// \brief The nested name specifier containing the qualifier. 1652 NestedNameSpecifier *NNS; 1653 1654 typedef llvm::PointerUnion<const IdentifierInfo *, 1655 const TemplateSpecializationType *> NameType; 1656 1657 /// \brief The type that this typename specifier refers to. 1658 NameType Name; 1659 1660 TypenameType(NestedNameSpecifier *NNS, const IdentifierInfo *Name, 1661 QualType CanonType) 1662 : Type(Typename, CanonType, true), NNS(NNS), Name(Name) { 1663 assert(NNS->isDependent() && 1664 "TypenameType requires a dependent nested-name-specifier"); 1665 } 1666 1667 TypenameType(NestedNameSpecifier *NNS, const TemplateSpecializationType *Ty, 1668 QualType CanonType) 1669 : Type(Typename, CanonType, true), NNS(NNS), Name(Ty) { 1670 assert(NNS->isDependent() && 1671 "TypenameType requires a dependent nested-name-specifier"); 1672 } 1673 1674 friend class ASTContext; // ASTContext creates these 1675 1676public: 1677 /// \brief Retrieve the qualification on this type. 1678 NestedNameSpecifier *getQualifier() const { return NNS; } 1679 1680 /// \brief Retrieve the type named by the typename specifier as an 1681 /// identifier. 1682 /// 1683 /// This routine will return a non-NULL identifier pointer when the 1684 /// form of the original typename was terminated by an identifier, 1685 /// e.g., "typename T::type". 1686 const IdentifierInfo *getIdentifier() const { 1687 return Name.dyn_cast<const IdentifierInfo *>(); 1688 } 1689 1690 /// \brief Retrieve the type named by the typename specifier as a 1691 /// type specialization. 1692 const TemplateSpecializationType *getTemplateId() const { 1693 return Name.dyn_cast<const TemplateSpecializationType *>(); 1694 } 1695 1696 virtual void getAsStringInternal(std::string &InnerString) const; 1697 1698 void Profile(llvm::FoldingSetNodeID &ID) { 1699 Profile(ID, NNS, Name); 1700 } 1701 1702 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 1703 NameType Name) { 1704 ID.AddPointer(NNS); 1705 ID.AddPointer(Name.getOpaqueValue()); 1706 } 1707 1708 static bool classof(const Type *T) { 1709 return T->getTypeClass() == Typename; 1710 } 1711 static bool classof(const TypenameType *T) { return true; } 1712 1713protected: 1714 virtual void EmitImpl(llvm::Serializer& S) const; 1715 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 1716 friend class Type; 1717}; 1718 1719/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 1720/// object oriented design. They basically correspond to C++ classes. There 1721/// are two kinds of interface types, normal interfaces like "NSString" and 1722/// qualified interfaces, which are qualified with a protocol list like 1723/// "NSString<NSCopyable, NSAmazing>". Qualified interface types are instances 1724/// of ObjCQualifiedInterfaceType, which is a subclass of ObjCInterfaceType. 1725class ObjCInterfaceType : public Type { 1726 ObjCInterfaceDecl *Decl; 1727protected: 1728 ObjCInterfaceType(TypeClass tc, ObjCInterfaceDecl *D) : 1729 Type(tc, QualType(), /*Dependent=*/false), Decl(D) { } 1730 friend class ASTContext; // ASTContext creates these. 1731public: 1732 1733 ObjCInterfaceDecl *getDecl() const { return Decl; } 1734 1735 /// qual_iterator and friends: this provides access to the (potentially empty) 1736 /// list of protocols qualifying this interface. If this is an instance of 1737 /// ObjCQualifiedInterfaceType it returns the list, otherwise it returns an 1738 /// empty list if there are no qualifying protocols. 1739 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 1740 inline qual_iterator qual_begin() const; 1741 inline qual_iterator qual_end() const; 1742 bool qual_empty() const { return getTypeClass() != ObjCQualifiedInterface; } 1743 1744 /// getNumProtocols - Return the number of qualifying protocols in this 1745 /// interface type, or 0 if there are none. 1746 inline unsigned getNumProtocols() const; 1747 1748 /// getProtocol - Return the specified qualifying protocol. 1749 inline ObjCProtocolDecl *getProtocol(unsigned i) const; 1750 1751 1752 virtual void getAsStringInternal(std::string &InnerString) const; 1753 static bool classof(const Type *T) { 1754 return T->getTypeClass() == ObjCInterface || 1755 T->getTypeClass() == ObjCQualifiedInterface; 1756 } 1757 static bool classof(const ObjCInterfaceType *) { return true; } 1758}; 1759 1760/// ObjCQualifiedInterfaceType - This class represents interface types 1761/// conforming to a list of protocols, such as INTF<Proto1, Proto2, Proto1>. 1762/// 1763/// Duplicate protocols are removed and protocol list is canonicalized to be in 1764/// alphabetical order. 1765class ObjCQualifiedInterfaceType : public ObjCInterfaceType, 1766 public llvm::FoldingSetNode { 1767 1768 // List of protocols for this protocol conforming object type 1769 // List is sorted on protocol name. No protocol is enterred more than once. 1770 llvm::SmallVector<ObjCProtocolDecl*, 4> Protocols; 1771 1772 ObjCQualifiedInterfaceType(ObjCInterfaceDecl *D, 1773 ObjCProtocolDecl **Protos, unsigned NumP) : 1774 ObjCInterfaceType(ObjCQualifiedInterface, D), 1775 Protocols(Protos, Protos+NumP) { } 1776 friend class ASTContext; // ASTContext creates these. 1777public: 1778 1779 ObjCProtocolDecl *getProtocol(unsigned i) const { 1780 return Protocols[i]; 1781 } 1782 unsigned getNumProtocols() const { 1783 return Protocols.size(); 1784 } 1785 1786 qual_iterator qual_begin() const { return Protocols.begin(); } 1787 qual_iterator qual_end() const { return Protocols.end(); } 1788 1789 virtual void getAsStringInternal(std::string &InnerString) const; 1790 1791 void Profile(llvm::FoldingSetNodeID &ID); 1792 static void Profile(llvm::FoldingSetNodeID &ID, 1793 const ObjCInterfaceDecl *Decl, 1794 ObjCProtocolDecl **protocols, unsigned NumProtocols); 1795 1796 static bool classof(const Type *T) { 1797 return T->getTypeClass() == ObjCQualifiedInterface; 1798 } 1799 static bool classof(const ObjCQualifiedInterfaceType *) { return true; } 1800}; 1801 1802inline ObjCInterfaceType::qual_iterator ObjCInterfaceType::qual_begin() const { 1803 if (const ObjCQualifiedInterfaceType *QIT = 1804 dyn_cast<ObjCQualifiedInterfaceType>(this)) 1805 return QIT->qual_begin(); 1806 return 0; 1807} 1808inline ObjCInterfaceType::qual_iterator ObjCInterfaceType::qual_end() const { 1809 if (const ObjCQualifiedInterfaceType *QIT = 1810 dyn_cast<ObjCQualifiedInterfaceType>(this)) 1811 return QIT->qual_end(); 1812 return 0; 1813} 1814 1815/// getNumProtocols - Return the number of qualifying protocols in this 1816/// interface type, or 0 if there are none. 1817inline unsigned ObjCInterfaceType::getNumProtocols() const { 1818 if (const ObjCQualifiedInterfaceType *QIT = 1819 dyn_cast<ObjCQualifiedInterfaceType>(this)) 1820 return QIT->getNumProtocols(); 1821 return 0; 1822} 1823 1824/// getProtocol - Return the specified qualifying protocol. 1825inline ObjCProtocolDecl *ObjCInterfaceType::getProtocol(unsigned i) const { 1826 return cast<ObjCQualifiedInterfaceType>(this)->getProtocol(i); 1827} 1828 1829 1830 1831/// ObjCQualifiedIdType - to represent id<protocol-list>. 1832/// 1833/// Duplicate protocols are removed and protocol list is canonicalized to be in 1834/// alphabetical order. 1835class ObjCQualifiedIdType : public Type, 1836 public llvm::FoldingSetNode { 1837 // List of protocols for this protocol conforming 'id' type 1838 // List is sorted on protocol name. No protocol is enterred more than once. 1839 llvm::SmallVector<ObjCProtocolDecl*, 8> Protocols; 1840 1841 ObjCQualifiedIdType(ObjCProtocolDecl **Protos, unsigned NumP) 1842 : Type(ObjCQualifiedId, QualType()/*these are always canonical*/, 1843 /*Dependent=*/false), 1844 Protocols(Protos, Protos+NumP) { } 1845 friend class ASTContext; // ASTContext creates these. 1846public: 1847 1848 ObjCProtocolDecl *getProtocols(unsigned i) const { 1849 return Protocols[i]; 1850 } 1851 unsigned getNumProtocols() const { 1852 return Protocols.size(); 1853 } 1854 ObjCProtocolDecl **getReferencedProtocols() { 1855 return &Protocols[0]; 1856 } 1857 1858 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 1859 qual_iterator qual_begin() const { return Protocols.begin(); } 1860 qual_iterator qual_end() const { return Protocols.end(); } 1861 1862 virtual void getAsStringInternal(std::string &InnerString) const; 1863 1864 void Profile(llvm::FoldingSetNodeID &ID); 1865 static void Profile(llvm::FoldingSetNodeID &ID, 1866 ObjCProtocolDecl **protocols, unsigned NumProtocols); 1867 1868 static bool classof(const Type *T) { 1869 return T->getTypeClass() == ObjCQualifiedId; 1870 } 1871 static bool classof(const ObjCQualifiedIdType *) { return true; } 1872 1873}; 1874 1875/// ObjCQualifiedClassType - to represent Class<protocol-list>. 1876/// 1877/// Duplicate protocols are removed and protocol list is canonicalized to be in 1878/// alphabetical order. 1879class ObjCQualifiedClassType : public Type, 1880 public llvm::FoldingSetNode { 1881 // List of protocols for this protocol conforming 'id' type 1882 // List is sorted on protocol name. No protocol is enterred more than once. 1883 llvm::SmallVector<ObjCProtocolDecl*, 8> Protocols; 1884 1885 ObjCQualifiedClassType(ObjCProtocolDecl **Protos, unsigned NumP) 1886 : Type(ObjCQualifiedClass, QualType()/*these are always canonical*/, 1887 /*Dependent=*/false), 1888 Protocols(Protos, Protos+NumP) { } 1889 friend class ASTContext; // ASTContext creates these. 1890public: 1891 1892 ObjCProtocolDecl *getProtocols(unsigned i) const { 1893 return Protocols[i]; 1894 } 1895 unsigned getNumProtocols() const { 1896 return Protocols.size(); 1897 } 1898 ObjCProtocolDecl **getReferencedProtocols() { 1899 return &Protocols[0]; 1900 } 1901 1902 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 1903 qual_iterator qual_begin() const { return Protocols.begin(); } 1904 qual_iterator qual_end() const { return Protocols.end(); } 1905 1906 virtual void getAsStringInternal(std::string &InnerString) const; 1907 1908 void Profile(llvm::FoldingSetNodeID &ID); 1909 static void Profile(llvm::FoldingSetNodeID &ID, 1910 ObjCProtocolDecl **protocols, unsigned NumProtocols); 1911 1912 static bool classof(const Type *T) { 1913 return T->getTypeClass() == ObjCQualifiedClass; 1914 } 1915 static bool classof(const ObjCQualifiedClassType *) { return true; } 1916 1917}; 1918 1919// Inline function definitions. 1920 1921/// getUnqualifiedType - Return the type without any qualifiers. 1922inline QualType QualType::getUnqualifiedType() const { 1923 Type *TP = getTypePtr(); 1924 if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(TP)) 1925 TP = EXTQT->getBaseType(); 1926 return QualType(TP, 0); 1927} 1928 1929/// getAddressSpace - Return the address space of this type. 1930inline unsigned QualType::getAddressSpace() const { 1931 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 1932 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 1933 return AT->getElementType().getAddressSpace(); 1934 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 1935 return RT->getAddressSpace(); 1936 if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(CT)) 1937 return EXTQT->getAddressSpace(); 1938 return 0; 1939} 1940 1941/// getObjCGCAttr - Return the gc attribute of this type. 1942inline QualType::GCAttrTypes QualType::getObjCGCAttr() const { 1943 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 1944 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 1945 return AT->getElementType().getObjCGCAttr(); 1946 if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(CT)) 1947 return EXTQT->getObjCGCAttr(); 1948 if (const PointerType *PT = CT->getAsPointerType()) 1949 return PT->getPointeeType().getObjCGCAttr(); 1950 return GCNone; 1951} 1952 1953/// isMoreQualifiedThan - Determine whether this type is more 1954/// qualified than the Other type. For example, "const volatile int" 1955/// is more qualified than "const int", "volatile int", and 1956/// "int". However, it is not more qualified than "const volatile 1957/// int". 1958inline bool QualType::isMoreQualifiedThan(QualType Other) const { 1959 // FIXME: Handle address spaces 1960 unsigned MyQuals = this->getCVRQualifiers(); 1961 unsigned OtherQuals = Other.getCVRQualifiers(); 1962 assert(this->getAddressSpace() == 0 && "Address space not checked"); 1963 assert(Other.getAddressSpace() == 0 && "Address space not checked"); 1964 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 1965} 1966 1967/// isAtLeastAsQualifiedAs - Determine whether this type is at last 1968/// as qualified as the Other type. For example, "const volatile 1969/// int" is at least as qualified as "const int", "volatile int", 1970/// "int", and "const volatile int". 1971inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 1972 // FIXME: Handle address spaces 1973 unsigned MyQuals = this->getCVRQualifiers(); 1974 unsigned OtherQuals = Other.getCVRQualifiers(); 1975 assert(this->getAddressSpace() == 0 && "Address space not checked"); 1976 assert(Other.getAddressSpace() == 0 && "Address space not checked"); 1977 return (MyQuals | OtherQuals) == MyQuals; 1978} 1979 1980/// getNonReferenceType - If Type is a reference type (e.g., const 1981/// int&), returns the type that the reference refers to ("const 1982/// int"). Otherwise, returns the type itself. This routine is used 1983/// throughout Sema to implement C++ 5p6: 1984/// 1985/// If an expression initially has the type "reference to T" (8.3.2, 1986/// 8.5.3), the type is adjusted to "T" prior to any further 1987/// analysis, the expression designates the object or function 1988/// denoted by the reference, and the expression is an lvalue. 1989inline QualType QualType::getNonReferenceType() const { 1990 if (const ReferenceType *RefType = (*this)->getAsReferenceType()) 1991 return RefType->getPointeeType(); 1992 else 1993 return *this; 1994} 1995 1996inline const TypedefType* Type::getAsTypedefType() const { 1997 return dyn_cast<TypedefType>(this); 1998} 1999inline const ObjCInterfaceType *Type::getAsPointerToObjCInterfaceType() const { 2000 if (const PointerType *PT = getAsPointerType()) 2001 return PT->getPointeeType()->getAsObjCInterfaceType(); 2002 return 0; 2003} 2004 2005// NOTE: All of these methods use "getUnqualifiedType" to strip off address 2006// space qualifiers if present. 2007inline bool Type::isFunctionType() const { 2008 return isa<FunctionType>(CanonicalType.getUnqualifiedType()); 2009} 2010inline bool Type::isPointerType() const { 2011 return isa<PointerType>(CanonicalType.getUnqualifiedType()); 2012} 2013inline bool Type::isBlockPointerType() const { 2014 return isa<BlockPointerType>(CanonicalType); 2015} 2016inline bool Type::isReferenceType() const { 2017 return isa<ReferenceType>(CanonicalType.getUnqualifiedType()); 2018} 2019inline bool Type::isLValueReferenceType() const { 2020 return isa<LValueReferenceType>(CanonicalType.getUnqualifiedType()); 2021} 2022inline bool Type::isRValueReferenceType() const { 2023 return isa<RValueReferenceType>(CanonicalType.getUnqualifiedType()); 2024} 2025inline bool Type::isFunctionPointerType() const { 2026 if (const PointerType* T = getAsPointerType()) 2027 return T->getPointeeType()->isFunctionType(); 2028 else 2029 return false; 2030} 2031inline bool Type::isMemberPointerType() const { 2032 return isa<MemberPointerType>(CanonicalType.getUnqualifiedType()); 2033} 2034inline bool Type::isMemberFunctionPointerType() const { 2035 if (const MemberPointerType* T = getAsMemberPointerType()) 2036 return T->getPointeeType()->isFunctionType(); 2037 else 2038 return false; 2039} 2040inline bool Type::isArrayType() const { 2041 return isa<ArrayType>(CanonicalType.getUnqualifiedType()); 2042} 2043inline bool Type::isConstantArrayType() const { 2044 return isa<ConstantArrayType>(CanonicalType.getUnqualifiedType()); 2045} 2046inline bool Type::isIncompleteArrayType() const { 2047 return isa<IncompleteArrayType>(CanonicalType.getUnqualifiedType()); 2048} 2049inline bool Type::isVariableArrayType() const { 2050 return isa<VariableArrayType>(CanonicalType.getUnqualifiedType()); 2051} 2052inline bool Type::isDependentSizedArrayType() const { 2053 return isa<DependentSizedArrayType>(CanonicalType.getUnqualifiedType()); 2054} 2055inline bool Type::isRecordType() const { 2056 return isa<RecordType>(CanonicalType.getUnqualifiedType()); 2057} 2058inline bool Type::isAnyComplexType() const { 2059 return isa<ComplexType>(CanonicalType.getUnqualifiedType()); 2060} 2061inline bool Type::isVectorType() const { 2062 return isa<VectorType>(CanonicalType.getUnqualifiedType()); 2063} 2064inline bool Type::isExtVectorType() const { 2065 return isa<ExtVectorType>(CanonicalType.getUnqualifiedType()); 2066} 2067inline bool Type::isObjCInterfaceType() const { 2068 return isa<ObjCInterfaceType>(CanonicalType.getUnqualifiedType()); 2069} 2070inline bool Type::isObjCQualifiedInterfaceType() const { 2071 return isa<ObjCQualifiedInterfaceType>(CanonicalType.getUnqualifiedType()); 2072} 2073inline bool Type::isObjCQualifiedIdType() const { 2074 return isa<ObjCQualifiedIdType>(CanonicalType.getUnqualifiedType()); 2075} 2076inline bool Type::isTemplateTypeParmType() const { 2077 return isa<TemplateTypeParmType>(CanonicalType.getUnqualifiedType()); 2078} 2079 2080inline bool Type::isSpecificBuiltinType(unsigned K) const { 2081 if (const BuiltinType *BT = getAsBuiltinType()) 2082 if (BT->getKind() == (BuiltinType::Kind) K) 2083 return true; 2084 return false; 2085} 2086 2087/// \brief Determines whether this is a type for which one can define 2088/// an overloaded operator. 2089inline bool Type::isOverloadableType() const { 2090 return isDependentType() || isRecordType() || isEnumeralType(); 2091} 2092 2093inline bool Type::hasPointerRepresentation() const { 2094 return (isPointerType() || isReferenceType() || isBlockPointerType() || 2095 isObjCInterfaceType() || isObjCQualifiedIdType() || 2096 isObjCQualifiedInterfaceType()); 2097} 2098 2099inline bool Type::hasObjCPointerRepresentation() const { 2100 return (isObjCInterfaceType() || isObjCQualifiedIdType() || 2101 isObjCQualifiedInterfaceType()); 2102} 2103 2104/// Insertion operator for diagnostics. This allows sending QualType's into a 2105/// diagnostic with <<. 2106inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 2107 QualType T) { 2108 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 2109 Diagnostic::ak_qualtype); 2110 return DB; 2111} 2112 2113} // end namespace clang 2114 2115#endif 2116