Type.h revision 4e7072872e8e2ed76a4c6933424bffa253896e7e
1//===--- Type.h - C Language Family Type Representation ---------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Type interface and subclasses. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_CLANG_AST_TYPE_H 15#define LLVM_CLANG_AST_TYPE_H 16 17#include "clang/Basic/Diagnostic.h" 18#include "clang/AST/NestedNameSpecifier.h" 19#include "llvm/Support/Casting.h" 20#include "llvm/ADT/APSInt.h" 21#include "llvm/ADT/FoldingSet.h" 22#include "llvm/ADT/PointerIntPair.h" 23#include "llvm/Bitcode/SerializationFwd.h" 24using llvm::isa; 25using llvm::cast; 26using llvm::cast_or_null; 27using llvm::dyn_cast; 28using llvm::dyn_cast_or_null; 29 30namespace llvm { 31 template <typename T> 32 class PointerLikeTypeInfo; 33} 34 35namespace clang { 36 class ASTContext; 37 class Type; 38 class TypedefDecl; 39 class TemplateDecl; 40 class TemplateTypeParmDecl; 41 class NonTypeTemplateParmDecl; 42 class TemplateTemplateParamDecl; 43 class TagDecl; 44 class RecordDecl; 45 class CXXRecordDecl; 46 class EnumDecl; 47 class FieldDecl; 48 class ObjCInterfaceDecl; 49 class ObjCProtocolDecl; 50 class ObjCMethodDecl; 51 class Expr; 52 class Stmt; 53 class SourceLocation; 54 class StmtIteratorBase; 55 class TemplateArgument; 56 class QualifiedNameType; 57 58 // Provide forward declarations for all of the *Type classes 59#define TYPE(Class, Base) class Class##Type; 60#include "clang/AST/TypeNodes.def" 61 62/// QualType - For efficiency, we don't store CVR-qualified types as nodes on 63/// their own: instead each reference to a type stores the qualifiers. This 64/// greatly reduces the number of nodes we need to allocate for types (for 65/// example we only need one for 'int', 'const int', 'volatile int', 66/// 'const volatile int', etc). 67/// 68/// As an added efficiency bonus, instead of making this a pair, we just store 69/// the three bits we care about in the low bits of the pointer. To handle the 70/// packing/unpacking, we make QualType be a simple wrapper class that acts like 71/// a smart pointer. 72class QualType { 73 llvm::PointerIntPair<Type*, 3> Value; 74public: 75 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 76 Const = 0x1, 77 Restrict = 0x2, 78 Volatile = 0x4, 79 CVRFlags = Const|Restrict|Volatile 80 }; 81 82 enum GCAttrTypes { 83 GCNone = 0, 84 Weak, 85 Strong 86 }; 87 88 QualType() {} 89 90 QualType(const Type *Ptr, unsigned Quals) 91 : Value(const_cast<Type*>(Ptr), Quals) {} 92 93 unsigned getCVRQualifiers() const { return Value.getInt(); } 94 void setCVRQualifiers(unsigned Quals) { Value.setInt(Quals); } 95 Type *getTypePtr() const { return Value.getPointer(); } 96 97 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 98 static QualType getFromOpaquePtr(void *Ptr) { 99 QualType T; 100 T.Value.setFromOpaqueValue(Ptr); 101 return T; 102 } 103 104 Type &operator*() const { 105 return *getTypePtr(); 106 } 107 108 Type *operator->() const { 109 return getTypePtr(); 110 } 111 112 /// isNull - Return true if this QualType doesn't point to a type yet. 113 bool isNull() const { 114 return getTypePtr() == 0; 115 } 116 117 bool isConstQualified() const { 118 return (getCVRQualifiers() & Const) ? true : false; 119 } 120 bool isVolatileQualified() const { 121 return (getCVRQualifiers() & Volatile) ? true : false; 122 } 123 bool isRestrictQualified() const { 124 return (getCVRQualifiers() & Restrict) ? true : false; 125 } 126 127 bool isConstant(ASTContext& Ctx) const; 128 129 /// addConst/addVolatile/addRestrict - add the specified type qual to this 130 /// QualType. 131 void addConst() { Value.setInt(Value.getInt() | Const); } 132 void addVolatile() { Value.setInt(Value.getInt() | Volatile); } 133 void addRestrict() { Value.setInt(Value.getInt() | Restrict); } 134 135 void removeConst() { Value.setInt(Value.getInt() & ~Const); } 136 void removeVolatile() { Value.setInt(Value.getInt() & ~Volatile); } 137 void removeRestrict() { Value.setInt(Value.getInt() & ~Restrict); } 138 139 QualType getQualifiedType(unsigned TQs) const { 140 return QualType(getTypePtr(), TQs); 141 } 142 QualType getWithAdditionalQualifiers(unsigned TQs) const { 143 return QualType(getTypePtr(), TQs|getCVRQualifiers()); 144 } 145 146 QualType withConst() const { return getWithAdditionalQualifiers(Const); } 147 QualType withVolatile() const { return getWithAdditionalQualifiers(Volatile);} 148 QualType withRestrict() const { return getWithAdditionalQualifiers(Restrict);} 149 150 QualType getUnqualifiedType() const; 151 bool isMoreQualifiedThan(QualType Other) const; 152 bool isAtLeastAsQualifiedAs(QualType Other) const; 153 QualType getNonReferenceType() const; 154 155 /// getDesugaredType - Return the specified type with any "sugar" removed from 156 /// the type. This takes off typedefs, typeof's etc. If the outer level of 157 /// the type is already concrete, it returns it unmodified. This is similar 158 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 159 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 160 /// concrete. 161 QualType getDesugaredType() const; 162 163 /// operator==/!= - Indicate whether the specified types and qualifiers are 164 /// identical. 165 bool operator==(const QualType &RHS) const { 166 return Value == RHS.Value; 167 } 168 bool operator!=(const QualType &RHS) const { 169 return Value != RHS.Value; 170 } 171 std::string getAsString() const { 172 std::string S; 173 getAsStringInternal(S); 174 return S; 175 } 176 void getAsStringInternal(std::string &Str) const; 177 178 void dump(const char *s) const; 179 void dump() const; 180 181 void Profile(llvm::FoldingSetNodeID &ID) const { 182 ID.AddPointer(getAsOpaquePtr()); 183 } 184 185public: 186 187 /// getAddressSpace - Return the address space of this type. 188 inline unsigned getAddressSpace() const; 189 190 /// GCAttrTypesAttr - Returns gc attribute of this type. 191 inline QualType::GCAttrTypes getObjCGCAttr() const; 192 193 /// isObjCGCWeak true when Type is objc's weak. 194 bool isObjCGCWeak() const { 195 return getObjCGCAttr() == Weak; 196 } 197 198 /// isObjCGCStrong true when Type is objc's strong. 199 bool isObjCGCStrong() const { 200 return getObjCGCAttr() == Strong; 201 } 202 203 /// Emit - Serialize a QualType to Bitcode. 204 void Emit(llvm::Serializer& S) const; 205 206 /// Read - Deserialize a QualType from Bitcode. 207 static QualType ReadVal(llvm::Deserializer& D); 208 209 void ReadBackpatch(llvm::Deserializer& D); 210}; 211 212} // end clang. 213 214namespace llvm { 215/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 216/// to a specific Type class. 217template<> struct simplify_type<const ::clang::QualType> { 218 typedef ::clang::Type* SimpleType; 219 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 220 return Val.getTypePtr(); 221 } 222}; 223template<> struct simplify_type< ::clang::QualType> 224 : public simplify_type<const ::clang::QualType> {}; 225 226// Teach SmallPtrSet that QualType is "basically a pointer". 227template<> 228class PointerLikeTypeInfo<clang::QualType> { 229public: 230 static inline void *getAsVoidPointer(clang::QualType P) { 231 return P.getAsOpaquePtr(); 232 } 233 static inline clang::QualType getFromVoidPointer(void *P) { 234 return clang::QualType::getFromOpaquePtr(P); 235 } 236}; 237} // end namespace llvm 238 239namespace clang { 240 241/// Type - This is the base class of the type hierarchy. A central concept 242/// with types is that each type always has a canonical type. A canonical type 243/// is the type with any typedef names stripped out of it or the types it 244/// references. For example, consider: 245/// 246/// typedef int foo; 247/// typedef foo* bar; 248/// 'int *' 'foo *' 'bar' 249/// 250/// There will be a Type object created for 'int'. Since int is canonical, its 251/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 252/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 253/// there is a PointerType that represents 'int*', which, like 'int', is 254/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 255/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 256/// is also 'int*'. 257/// 258/// Non-canonical types are useful for emitting diagnostics, without losing 259/// information about typedefs being used. Canonical types are useful for type 260/// comparisons (they allow by-pointer equality tests) and useful for reasoning 261/// about whether something has a particular form (e.g. is a function type), 262/// because they implicitly, recursively, strip all typedefs out of a type. 263/// 264/// Types, once created, are immutable. 265/// 266class Type { 267public: 268 enum TypeClass { 269#define TYPE(Class, Base) Class, 270#define ABSTRACT_TYPE(Class, Base) 271#include "clang/AST/TypeNodes.def" 272 TagFirst = Record, TagLast = Enum 273 }; 274 275private: 276 QualType CanonicalType; 277 278 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 279 bool Dependent : 1; 280 281 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 282 /// Note that this should stay at the end of the ivars for Type so that 283 /// subclasses can pack their bitfields into the same word. 284 unsigned TC : 5; 285 286protected: 287 // silence VC++ warning C4355: 'this' : used in base member initializer list 288 Type *this_() { return this; } 289 Type(TypeClass tc, QualType Canonical, bool dependent) 290 : CanonicalType(Canonical.isNull() ? QualType(this_(), 0) : Canonical), 291 Dependent(dependent), TC(tc) {} 292 virtual ~Type() {} 293 virtual void Destroy(ASTContext& C); 294 friend class ASTContext; 295 296 void EmitTypeInternal(llvm::Serializer& S) const; 297 void ReadTypeInternal(llvm::Deserializer& D); 298 299public: 300 TypeClass getTypeClass() const { return static_cast<TypeClass>(TC); } 301 302 bool isCanonical() const { return CanonicalType.getTypePtr() == this; } 303 304 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 305 /// object types, function types, and incomplete types. 306 307 /// \brief Determines whether the type describes an object in memory. 308 /// 309 /// Note that this definition of object type corresponds to the C++ 310 /// definition of object type, which includes incomplete types, as 311 /// opposed to the C definition (which does not include incomplete 312 /// types). 313 bool isObjectType() const; 314 315 /// isIncompleteType - Return true if this is an incomplete type. 316 /// A type that can describe objects, but which lacks information needed to 317 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 318 /// routine will need to determine if the size is actually required. 319 bool isIncompleteType() const; 320 321 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 322 /// type, in other words, not a function type. 323 bool isIncompleteOrObjectType() const { 324 return !isFunctionType(); 325 } 326 327 /// isPODType - Return true if this is a plain-old-data type (C++ 3.9p10). 328 bool isPODType() const; 329 330 /// isVariablyModifiedType (C99 6.7.5.2p2) - Return true for variable array 331 /// types that have a non-constant expression. This does not include "[]". 332 bool isVariablyModifiedType() const; 333 334 /// Helper methods to distinguish type categories. All type predicates 335 /// operate on the canonical type, ignoring typedefs and qualifiers. 336 337 /// isSpecificBuiltinType - Test for a particular builtin type. 338 bool isSpecificBuiltinType(unsigned K) const; 339 340 /// isIntegerType() does *not* include complex integers (a GCC extension). 341 /// isComplexIntegerType() can be used to test for complex integers. 342 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 343 bool isEnumeralType() const; 344 bool isBooleanType() const; 345 bool isCharType() const; 346 bool isWideCharType() const; 347 bool isIntegralType() const; 348 349 /// Floating point categories. 350 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 351 /// isComplexType() does *not* include complex integers (a GCC extension). 352 /// isComplexIntegerType() can be used to test for complex integers. 353 bool isComplexType() const; // C99 6.2.5p11 (complex) 354 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 355 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 356 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 357 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 358 bool isVoidType() const; // C99 6.2.5p19 359 bool isDerivedType() const; // C99 6.2.5p20 360 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 361 bool isAggregateType() const; 362 363 // Type Predicates: Check to see if this type is structurally the specified 364 // type, ignoring typedefs and qualifiers. 365 bool isFunctionType() const; 366 bool isFunctionNoProtoType() const { return getAsFunctionNoProtoType() != 0; } 367 bool isFunctionProtoType() const { return getAsFunctionProtoType() != 0; } 368 bool isPointerType() const; 369 bool isBlockPointerType() const; 370 bool isReferenceType() const; 371 bool isLValueReferenceType() const; 372 bool isRValueReferenceType() const; 373 bool isFunctionPointerType() const; 374 bool isMemberPointerType() const; 375 bool isMemberFunctionPointerType() const; 376 bool isArrayType() const; 377 bool isConstantArrayType() const; 378 bool isIncompleteArrayType() const; 379 bool isVariableArrayType() const; 380 bool isDependentSizedArrayType() const; 381 bool isRecordType() const; 382 bool isClassType() const; 383 bool isStructureType() const; 384 bool isUnionType() const; 385 bool isComplexIntegerType() const; // GCC _Complex integer type. 386 bool isVectorType() const; // GCC vector type. 387 bool isExtVectorType() const; // Extended vector type. 388 bool isObjCInterfaceType() const; // NSString or NSString<foo> 389 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 390 bool isObjCQualifiedIdType() const; // id<foo> 391 bool isTemplateTypeParmType() const; // C++ template type parameter 392 393 /// isDependentType - Whether this type is a dependent type, meaning 394 /// that its definition somehow depends on a template parameter 395 /// (C++ [temp.dep.type]). 396 bool isDependentType() const { return Dependent; } 397 bool isOverloadableType() const; 398 399 /// hasPointerRepresentation - Whether this type is represented 400 /// natively as a pointer; this includes pointers, references, block 401 /// pointers, and Objective-C interface, qualified id, and qualified 402 /// interface types. 403 bool hasPointerRepresentation() const; 404 405 /// hasObjCPointerRepresentation - Whether this type can represent 406 /// an objective pointer type for the purpose of GC'ability 407 bool hasObjCPointerRepresentation() const; 408 409 // Type Checking Functions: Check to see if this type is structurally the 410 // specified type, ignoring typedefs and qualifiers, and return a pointer to 411 // the best type we can. 412 const BuiltinType *getAsBuiltinType() const; 413 const FunctionType *getAsFunctionType() const; 414 const FunctionNoProtoType *getAsFunctionNoProtoType() const; 415 const FunctionProtoType *getAsFunctionProtoType() const; 416 const PointerType *getAsPointerType() const; 417 const BlockPointerType *getAsBlockPointerType() const; 418 const ReferenceType *getAsReferenceType() const; 419 const LValueReferenceType *getAsLValueReferenceType() const; 420 const RValueReferenceType *getAsRValueReferenceType() const; 421 const MemberPointerType *getAsMemberPointerType() const; 422 const TagType *getAsTagType() const; 423 const RecordType *getAsRecordType() const; 424 const RecordType *getAsStructureType() const; 425 /// NOTE: getAs*ArrayType are methods on ASTContext. 426 const TypedefType *getAsTypedefType() const; 427 const RecordType *getAsUnionType() const; 428 const EnumType *getAsEnumType() const; 429 const VectorType *getAsVectorType() const; // GCC vector type. 430 const ComplexType *getAsComplexType() const; 431 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 432 const ExtVectorType *getAsExtVectorType() const; // Extended vector type. 433 const ObjCInterfaceType *getAsObjCInterfaceType() const; 434 const ObjCQualifiedInterfaceType *getAsObjCQualifiedInterfaceType() const; 435 const ObjCQualifiedIdType *getAsObjCQualifiedIdType() const; 436 const TemplateTypeParmType *getAsTemplateTypeParmType() const; 437 438 const ClassTemplateSpecializationType * 439 getAsClassTemplateSpecializationType() const; 440 441 /// getAsPointerToObjCInterfaceType - If this is a pointer to an ObjC 442 /// interface, return the interface type, otherwise return null. 443 const ObjCInterfaceType *getAsPointerToObjCInterfaceType() const; 444 445 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 446 /// element type of the array, potentially with type qualifiers missing. 447 /// This method should never be used when type qualifiers are meaningful. 448 const Type *getArrayElementTypeNoTypeQual() const; 449 450 /// getDesugaredType - Return the specified type with any "sugar" removed from 451 /// the type. This takes off typedefs, typeof's etc. If the outer level of 452 /// the type is already concrete, it returns it unmodified. This is similar 453 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 454 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 455 /// concrete. 456 QualType getDesugaredType() const; 457 458 /// More type predicates useful for type checking/promotion 459 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 460 461 /// isSignedIntegerType - Return true if this is an integer type that is 462 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 463 /// an enum decl which has a signed representation, or a vector of signed 464 /// integer element type. 465 bool isSignedIntegerType() const; 466 467 /// isUnsignedIntegerType - Return true if this is an integer type that is 468 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 469 /// decl which has an unsigned representation, or a vector of unsigned integer 470 /// element type. 471 bool isUnsignedIntegerType() const; 472 473 /// isConstantSizeType - Return true if this is not a variable sized type, 474 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 475 /// incomplete types. 476 bool isConstantSizeType() const; 477 478 QualType getCanonicalTypeInternal() const { return CanonicalType; } 479 void dump() const; 480 virtual void getAsStringInternal(std::string &InnerString) const = 0; 481 static bool classof(const Type *) { return true; } 482 483protected: 484 /// Emit - Emit a Type to bitcode. Used by ASTContext. 485 void Emit(llvm::Serializer& S) const; 486 487 /// Create - Construct a Type from bitcode. Used by ASTContext. 488 static void Create(ASTContext& Context, unsigned i, llvm::Deserializer& S); 489 490 /// EmitImpl - Subclasses must implement this method in order to 491 /// be serialized. 492 // FIXME: Make this abstract once implemented. 493 virtual void EmitImpl(llvm::Serializer& S) const { 494 assert(false && "Serialization for type not supported."); 495 } 496}; 497 498/// ExtQualType - TR18037 (C embedded extensions) 6.2.5p26 499/// This supports all kinds of type attributes; including, 500/// address space qualified types, objective-c's __weak and 501/// __strong attributes. 502/// 503class ExtQualType : public Type, public llvm::FoldingSetNode { 504 /// BaseType - This is the underlying type that this qualifies. All CVR 505 /// qualifiers are stored on the QualType that references this type, so we 506 /// can't have any here. 507 Type *BaseType; 508 509 /// Address Space ID - The address space ID this type is qualified with. 510 unsigned AddressSpace; 511 /// GC __weak/__strong attributes 512 QualType::GCAttrTypes GCAttrType; 513 514 ExtQualType(Type *Base, QualType CanonicalPtr, unsigned AddrSpace, 515 QualType::GCAttrTypes gcAttr) : 516 Type(ExtQual, CanonicalPtr, Base->isDependentType()), BaseType(Base), 517 AddressSpace(AddrSpace), GCAttrType(gcAttr) { 518 assert(!isa<ExtQualType>(BaseType) && 519 "Cannot have ExtQualType of ExtQualType"); 520 } 521 friend class ASTContext; // ASTContext creates these. 522public: 523 Type *getBaseType() const { return BaseType; } 524 QualType::GCAttrTypes getObjCGCAttr() const { return GCAttrType; } 525 unsigned getAddressSpace() const { return AddressSpace; } 526 527 virtual void getAsStringInternal(std::string &InnerString) const; 528 529 void Profile(llvm::FoldingSetNodeID &ID) { 530 Profile(ID, getBaseType(), AddressSpace, GCAttrType); 531 } 532 static void Profile(llvm::FoldingSetNodeID &ID, Type *Base, 533 unsigned AddrSpace, QualType::GCAttrTypes gcAttr) { 534 ID.AddPointer(Base); 535 ID.AddInteger(AddrSpace); 536 ID.AddInteger(gcAttr); 537 } 538 539 static bool classof(const Type *T) { return T->getTypeClass() == ExtQual; } 540 static bool classof(const ExtQualType *) { return true; } 541 542protected: 543 virtual void EmitImpl(llvm::Serializer& S) const; 544 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 545 friend class Type; 546}; 547 548 549/// BuiltinType - This class is used for builtin types like 'int'. Builtin 550/// types are always canonical and have a literal name field. 551class BuiltinType : public Type { 552public: 553 enum Kind { 554 Void, 555 556 Bool, // This is bool and/or _Bool. 557 Char_U, // This is 'char' for targets where char is unsigned. 558 UChar, // This is explicitly qualified unsigned char. 559 UShort, 560 UInt, 561 ULong, 562 ULongLong, 563 564 Char_S, // This is 'char' for targets where char is signed. 565 SChar, // This is explicitly qualified signed char. 566 WChar, // This is 'wchar_t' for C++. 567 Short, 568 Int, 569 Long, 570 LongLong, 571 572 Float, Double, LongDouble, 573 574 Overload, // This represents the type of an overloaded function declaration. 575 Dependent // This represents the type of a type-dependent expression. 576 }; 577private: 578 Kind TypeKind; 579public: 580 BuiltinType(Kind K) 581 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent)), 582 TypeKind(K) {} 583 584 Kind getKind() const { return TypeKind; } 585 const char *getName() const; 586 587 virtual void getAsStringInternal(std::string &InnerString) const; 588 589 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 590 static bool classof(const BuiltinType *) { return true; } 591}; 592 593/// FixedWidthIntType - Used for arbitrary width types that we either don't 594/// want to or can't map to named integer types. These always have a lower 595/// integer rank than builtin types of the same width. 596class FixedWidthIntType : public Type { 597private: 598 unsigned Width; 599 bool Signed; 600public: 601 FixedWidthIntType(unsigned W, bool S) : Type(FixedWidthInt, QualType(), false), 602 Width(W), Signed(S) {} 603 604 unsigned getWidth() const { return Width; } 605 bool isSigned() const { return Signed; } 606 const char *getName() const; 607 608 virtual void getAsStringInternal(std::string &InnerString) const; 609 610 static bool classof(const Type *T) { return T->getTypeClass() == FixedWidthInt; } 611 static bool classof(const FixedWidthIntType *) { return true; } 612}; 613 614/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 615/// types (_Complex float etc) as well as the GCC integer complex extensions. 616/// 617class ComplexType : public Type, public llvm::FoldingSetNode { 618 QualType ElementType; 619 ComplexType(QualType Element, QualType CanonicalPtr) : 620 Type(Complex, CanonicalPtr, Element->isDependentType()), 621 ElementType(Element) { 622 } 623 friend class ASTContext; // ASTContext creates these. 624public: 625 QualType getElementType() const { return ElementType; } 626 627 virtual void getAsStringInternal(std::string &InnerString) const; 628 629 void Profile(llvm::FoldingSetNodeID &ID) { 630 Profile(ID, getElementType()); 631 } 632 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 633 ID.AddPointer(Element.getAsOpaquePtr()); 634 } 635 636 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 637 static bool classof(const ComplexType *) { 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/// PointerType - C99 6.7.5.1 - Pointer Declarators. 646/// 647class PointerType : public Type, public llvm::FoldingSetNode { 648 QualType PointeeType; 649 650 PointerType(QualType Pointee, QualType CanonicalPtr) : 651 Type(Pointer, CanonicalPtr, Pointee->isDependentType()), PointeeType(Pointee) { 652 } 653 friend class ASTContext; // ASTContext creates these. 654public: 655 656 virtual void getAsStringInternal(std::string &InnerString) const; 657 658 QualType getPointeeType() const { return PointeeType; } 659 660 void Profile(llvm::FoldingSetNodeID &ID) { 661 Profile(ID, getPointeeType()); 662 } 663 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 664 ID.AddPointer(Pointee.getAsOpaquePtr()); 665 } 666 667 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 668 static bool classof(const PointerType *) { return true; } 669 670protected: 671 virtual void EmitImpl(llvm::Serializer& S) const; 672 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 673 friend class Type; 674}; 675 676/// BlockPointerType - pointer to a block type. 677/// This type is to represent types syntactically represented as 678/// "void (^)(int)", etc. Pointee is required to always be a function type. 679/// 680class BlockPointerType : public Type, public llvm::FoldingSetNode { 681 QualType PointeeType; // Block is some kind of pointer type 682 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 683 Type(BlockPointer, CanonicalCls, Pointee->isDependentType()), 684 PointeeType(Pointee) { 685 } 686 friend class ASTContext; // ASTContext creates these. 687public: 688 689 // Get the pointee type. Pointee is required to always be a function type. 690 QualType getPointeeType() const { return PointeeType; } 691 692 virtual void getAsStringInternal(std::string &InnerString) const; 693 694 void Profile(llvm::FoldingSetNodeID &ID) { 695 Profile(ID, getPointeeType()); 696 } 697 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 698 ID.AddPointer(Pointee.getAsOpaquePtr()); 699 } 700 701 static bool classof(const Type *T) { 702 return T->getTypeClass() == BlockPointer; 703 } 704 static bool classof(const BlockPointerType *) { return true; } 705 706 protected: 707 virtual void EmitImpl(llvm::Serializer& S) const; 708 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 709 friend class Type; 710}; 711 712/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 713/// 714class ReferenceType : public Type, public llvm::FoldingSetNode { 715 QualType PointeeType; 716 717protected: 718 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef) : 719 Type(tc, CanonicalRef, Referencee->isDependentType()), 720 PointeeType(Referencee) { 721 } 722public: 723 QualType getPointeeType() const { return PointeeType; } 724 725 void Profile(llvm::FoldingSetNodeID &ID) { 726 Profile(ID, getPointeeType()); 727 } 728 static void Profile(llvm::FoldingSetNodeID &ID, QualType Referencee) { 729 ID.AddPointer(Referencee.getAsOpaquePtr()); 730 } 731 732 static bool classof(const Type *T) { 733 return T->getTypeClass() == LValueReference || 734 T->getTypeClass() == RValueReference; 735 } 736 static bool classof(const ReferenceType *) { return true; } 737 738protected: 739 virtual void EmitImpl(llvm::Serializer& S) const; 740}; 741 742/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 743/// 744class LValueReferenceType : public ReferenceType { 745 LValueReferenceType(QualType Referencee, QualType CanonicalRef) : 746 ReferenceType(LValueReference, Referencee, CanonicalRef) { 747 } 748 friend class ASTContext; // ASTContext creates these 749public: 750 virtual void getAsStringInternal(std::string &InnerString) const; 751 752 static bool classof(const Type *T) { 753 return T->getTypeClass() == LValueReference; 754 } 755 static bool classof(const LValueReferenceType *) { return true; } 756 757protected: 758 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 759 friend class Type; 760}; 761 762/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 763/// 764class RValueReferenceType : public ReferenceType { 765 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 766 ReferenceType(RValueReference, Referencee, CanonicalRef) { 767 } 768 friend class ASTContext; // ASTContext creates these 769public: 770 virtual void getAsStringInternal(std::string &InnerString) const; 771 772 static bool classof(const Type *T) { 773 return T->getTypeClass() == RValueReference; 774 } 775 static bool classof(const RValueReferenceType *) { return true; } 776 777protected: 778 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 779 friend class Type; 780}; 781 782/// MemberPointerType - C++ 8.3.3 - Pointers to members 783/// 784class MemberPointerType : public Type, public llvm::FoldingSetNode { 785 QualType PointeeType; 786 /// The class of which the pointee is a member. Must ultimately be a 787 /// RecordType, but could be a typedef or a template parameter too. 788 const Type *Class; 789 790 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 791 Type(MemberPointer, CanonicalPtr, 792 Cls->isDependentType() || Pointee->isDependentType()), 793 PointeeType(Pointee), Class(Cls) { 794 } 795 friend class ASTContext; // ASTContext creates these. 796public: 797 798 QualType getPointeeType() const { return PointeeType; } 799 800 const Type *getClass() const { return Class; } 801 802 virtual void getAsStringInternal(std::string &InnerString) const; 803 804 void Profile(llvm::FoldingSetNodeID &ID) { 805 Profile(ID, getPointeeType(), getClass()); 806 } 807 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 808 const Type *Class) { 809 ID.AddPointer(Pointee.getAsOpaquePtr()); 810 ID.AddPointer(Class); 811 } 812 813 static bool classof(const Type *T) { 814 return T->getTypeClass() == MemberPointer; 815 } 816 static bool classof(const MemberPointerType *) { return true; } 817 818protected: 819 virtual void EmitImpl(llvm::Serializer& S) const; 820 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 821 friend class Type; 822}; 823 824/// ArrayType - C99 6.7.5.2 - Array Declarators. 825/// 826class ArrayType : public Type, public llvm::FoldingSetNode { 827public: 828 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 829 /// an array with a static size (e.g. int X[static 4]), or an array 830 /// with a star size (e.g. int X[*]). 831 /// 'static' is only allowed on function parameters. 832 enum ArraySizeModifier { 833 Normal, Static, Star 834 }; 835private: 836 /// ElementType - The element type of the array. 837 QualType ElementType; 838 839 // NOTE: VC++ treats enums as signed, avoid using the ArraySizeModifier enum 840 /// NOTE: These fields are packed into the bitfields space in the Type class. 841 unsigned SizeModifier : 2; 842 843 /// IndexTypeQuals - Capture qualifiers in declarations like: 844 /// 'int X[static restrict 4]'. For function parameters only. 845 unsigned IndexTypeQuals : 3; 846 847protected: 848 // C++ [temp.dep.type]p1: 849 // A type is dependent if it is... 850 // - an array type constructed from any dependent type or whose 851 // size is specified by a constant expression that is 852 // value-dependent, 853 ArrayType(TypeClass tc, QualType et, QualType can, 854 ArraySizeModifier sm, unsigned tq) 855 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray), 856 ElementType(et), SizeModifier(sm), IndexTypeQuals(tq) {} 857 858 friend class ASTContext; // ASTContext creates these. 859public: 860 QualType getElementType() const { return ElementType; } 861 ArraySizeModifier getSizeModifier() const { 862 return ArraySizeModifier(SizeModifier); 863 } 864 unsigned getIndexTypeQualifier() const { return IndexTypeQuals; } 865 866 static bool classof(const Type *T) { 867 return T->getTypeClass() == ConstantArray || 868 T->getTypeClass() == VariableArray || 869 T->getTypeClass() == IncompleteArray || 870 T->getTypeClass() == DependentSizedArray; 871 } 872 static bool classof(const ArrayType *) { return true; } 873}; 874 875/// ConstantArrayType - This class represents C arrays with a specified constant 876/// size. For example 'int A[100]' has ConstantArrayType where the element type 877/// is 'int' and the size is 100. 878class ConstantArrayType : public ArrayType { 879 llvm::APInt Size; // Allows us to unique the type. 880 881 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 882 ArraySizeModifier sm, unsigned tq) 883 : ArrayType(ConstantArray, et, can, sm, tq), Size(size) {} 884 friend class ASTContext; // ASTContext creates these. 885public: 886 const llvm::APInt &getSize() const { return Size; } 887 virtual void getAsStringInternal(std::string &InnerString) const; 888 889 void Profile(llvm::FoldingSetNodeID &ID) { 890 Profile(ID, getElementType(), getSize(), 891 getSizeModifier(), getIndexTypeQualifier()); 892 } 893 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 894 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 895 unsigned TypeQuals) { 896 ID.AddPointer(ET.getAsOpaquePtr()); 897 ID.AddInteger(ArraySize.getZExtValue()); 898 ID.AddInteger(SizeMod); 899 ID.AddInteger(TypeQuals); 900 } 901 static bool classof(const Type *T) { 902 return T->getTypeClass() == ConstantArray; 903 } 904 static bool classof(const ConstantArrayType *) { return true; } 905 906protected: 907 virtual void EmitImpl(llvm::Serializer& S) const; 908 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 909 friend class Type; 910}; 911 912/// IncompleteArrayType - This class represents C arrays with an unspecified 913/// size. For example 'int A[]' has an IncompleteArrayType where the element 914/// type is 'int' and the size is unspecified. 915class IncompleteArrayType : public ArrayType { 916 IncompleteArrayType(QualType et, QualType can, 917 ArraySizeModifier sm, unsigned tq) 918 : ArrayType(IncompleteArray, et, can, sm, tq) {} 919 friend class ASTContext; // ASTContext creates these. 920public: 921 922 virtual void getAsStringInternal(std::string &InnerString) const; 923 924 static bool classof(const Type *T) { 925 return T->getTypeClass() == IncompleteArray; 926 } 927 static bool classof(const IncompleteArrayType *) { return true; } 928 929 friend class StmtIteratorBase; 930 931 void Profile(llvm::FoldingSetNodeID &ID) { 932 Profile(ID, getElementType(), getSizeModifier(), getIndexTypeQualifier()); 933 } 934 935 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 936 ArraySizeModifier SizeMod, unsigned TypeQuals) { 937 ID.AddPointer(ET.getAsOpaquePtr()); 938 ID.AddInteger(SizeMod); 939 ID.AddInteger(TypeQuals); 940 } 941 942protected: 943 virtual void EmitImpl(llvm::Serializer& S) const; 944 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 945 friend class Type; 946}; 947 948/// VariableArrayType - This class represents C arrays with a specified size 949/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 950/// Since the size expression is an arbitrary expression, we store it as such. 951/// 952/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 953/// should not be: two lexically equivalent variable array types could mean 954/// different things, for example, these variables do not have the same type 955/// dynamically: 956/// 957/// void foo(int x) { 958/// int Y[x]; 959/// ++x; 960/// int Z[x]; 961/// } 962/// 963class VariableArrayType : public ArrayType { 964 /// SizeExpr - An assignment expression. VLA's are only permitted within 965 /// a function block. 966 Stmt *SizeExpr; 967 968 VariableArrayType(QualType et, QualType can, Expr *e, 969 ArraySizeModifier sm, unsigned tq) 970 : ArrayType(VariableArray, et, can, sm, tq), SizeExpr((Stmt*) e) {} 971 friend class ASTContext; // ASTContext creates these. 972 virtual void Destroy(ASTContext& C); 973 974public: 975 Expr *getSizeExpr() const { 976 // We use C-style casts instead of cast<> here because we do not wish 977 // to have a dependency of Type.h on Stmt.h/Expr.h. 978 return (Expr*) SizeExpr; 979 } 980 981 virtual void getAsStringInternal(std::string &InnerString) const; 982 983 static bool classof(const Type *T) { 984 return T->getTypeClass() == VariableArray; 985 } 986 static bool classof(const VariableArrayType *) { return true; } 987 988 friend class StmtIteratorBase; 989 990 void Profile(llvm::FoldingSetNodeID &ID) { 991 assert(0 && "Cannnot unique VariableArrayTypes."); 992 } 993 994protected: 995 virtual void EmitImpl(llvm::Serializer& S) const; 996 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 997 friend class Type; 998}; 999 1000/// DependentSizedArrayType - This type represents an array type in 1001/// C++ whose size is a value-dependent expression. For example: 1002/// @code 1003/// template<typename T, int Size> 1004/// class array { 1005/// T data[Size]; 1006/// }; 1007/// @endcode 1008/// For these types, we won't actually know what the array bound is 1009/// until template instantiation occurs, at which point this will 1010/// become either a ConstantArrayType or a VariableArrayType. 1011class DependentSizedArrayType : public ArrayType { 1012 /// SizeExpr - An assignment expression that will instantiate to the 1013 /// size of the array. 1014 Stmt *SizeExpr; 1015 1016 DependentSizedArrayType(QualType et, QualType can, Expr *e, 1017 ArraySizeModifier sm, unsigned tq) 1018 : ArrayType(DependentSizedArray, et, can, sm, tq), SizeExpr((Stmt*) e) {} 1019 friend class ASTContext; // ASTContext creates these. 1020 virtual void Destroy(ASTContext& C); 1021 1022public: 1023 Expr *getSizeExpr() const { 1024 // We use C-style casts instead of cast<> here because we do not wish 1025 // to have a dependency of Type.h on Stmt.h/Expr.h. 1026 return (Expr*) SizeExpr; 1027 } 1028 1029 virtual void getAsStringInternal(std::string &InnerString) const; 1030 1031 static bool classof(const Type *T) { 1032 return T->getTypeClass() == DependentSizedArray; 1033 } 1034 static bool classof(const DependentSizedArrayType *) { return true; } 1035 1036 friend class StmtIteratorBase; 1037 1038 void Profile(llvm::FoldingSetNodeID &ID) { 1039 assert(0 && "Cannnot unique DependentSizedArrayTypes."); 1040 } 1041 1042protected: 1043 virtual void EmitImpl(llvm::Serializer& S) const; 1044 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 1045 friend class Type; 1046}; 1047 1048/// VectorType - GCC generic vector type. This type is created using 1049/// __attribute__((vector_size(n)), where "n" specifies the vector size in 1050/// bytes. Since the constructor takes the number of vector elements, the 1051/// client is responsible for converting the size into the number of elements. 1052class VectorType : public Type, public llvm::FoldingSetNode { 1053protected: 1054 /// ElementType - The element type of the vector. 1055 QualType ElementType; 1056 1057 /// NumElements - The number of elements in the vector. 1058 unsigned NumElements; 1059 1060 VectorType(QualType vecType, unsigned nElements, QualType canonType) : 1061 Type(Vector, canonType, vecType->isDependentType()), 1062 ElementType(vecType), NumElements(nElements) {} 1063 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 1064 QualType canonType) 1065 : Type(tc, canonType, vecType->isDependentType()), ElementType(vecType), 1066 NumElements(nElements) {} 1067 friend class ASTContext; // ASTContext creates these. 1068public: 1069 1070 QualType getElementType() const { return ElementType; } 1071 unsigned getNumElements() const { return NumElements; } 1072 1073 virtual void getAsStringInternal(std::string &InnerString) const; 1074 1075 void Profile(llvm::FoldingSetNodeID &ID) { 1076 Profile(ID, getElementType(), getNumElements(), getTypeClass()); 1077 } 1078 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 1079 unsigned NumElements, TypeClass TypeClass) { 1080 ID.AddPointer(ElementType.getAsOpaquePtr()); 1081 ID.AddInteger(NumElements); 1082 ID.AddInteger(TypeClass); 1083 } 1084 static bool classof(const Type *T) { 1085 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 1086 } 1087 static bool classof(const VectorType *) { return true; } 1088}; 1089 1090/// ExtVectorType - Extended vector type. This type is created using 1091/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 1092/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 1093/// class enables syntactic extensions, like Vector Components for accessing 1094/// points, colors, and textures (modeled after OpenGL Shading Language). 1095class ExtVectorType : public VectorType { 1096 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 1097 VectorType(ExtVector, vecType, nElements, canonType) {} 1098 friend class ASTContext; // ASTContext creates these. 1099public: 1100 static int getPointAccessorIdx(char c) { 1101 switch (c) { 1102 default: return -1; 1103 case 'x': return 0; 1104 case 'y': return 1; 1105 case 'z': return 2; 1106 case 'w': return 3; 1107 } 1108 } 1109 static int getNumericAccessorIdx(char c) { 1110 switch (c) { 1111 default: return -1; 1112 case '0': return 0; 1113 case '1': return 1; 1114 case '2': return 2; 1115 case '3': return 3; 1116 case '4': return 4; 1117 case '5': return 5; 1118 case '6': return 6; 1119 case '7': return 7; 1120 case '8': return 8; 1121 case '9': return 9; 1122 case 'a': return 10; 1123 case 'b': return 11; 1124 case 'c': return 12; 1125 case 'd': return 13; 1126 case 'e': return 14; 1127 case 'f': return 15; 1128 } 1129 } 1130 1131 static int getAccessorIdx(char c) { 1132 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 1133 return getNumericAccessorIdx(c); 1134 } 1135 1136 bool isAccessorWithinNumElements(char c) const { 1137 if (int idx = getAccessorIdx(c)+1) 1138 return unsigned(idx-1) < NumElements; 1139 return false; 1140 } 1141 virtual void getAsStringInternal(std::string &InnerString) const; 1142 1143 static bool classof(const Type *T) { 1144 return T->getTypeClass() == ExtVector; 1145 } 1146 static bool classof(const ExtVectorType *) { return true; } 1147}; 1148 1149/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 1150/// class of FunctionNoProtoType and FunctionProtoType. 1151/// 1152class FunctionType : public Type { 1153 /// SubClassData - This field is owned by the subclass, put here to pack 1154 /// tightly with the ivars in Type. 1155 bool SubClassData : 1; 1156 1157 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1158 /// other bitfields. 1159 /// The qualifiers are part of FunctionProtoType because... 1160 /// 1161 /// C++ 8.3.5p4: The return type, the parameter type list and the 1162 /// cv-qualifier-seq, [...], are part of the function type. 1163 /// 1164 unsigned TypeQuals : 3; 1165 1166 // The type returned by the function. 1167 QualType ResultType; 1168protected: 1169 FunctionType(TypeClass tc, QualType res, bool SubclassInfo, 1170 unsigned typeQuals, QualType Canonical, bool Dependent) 1171 : Type(tc, Canonical, Dependent), 1172 SubClassData(SubclassInfo), TypeQuals(typeQuals), ResultType(res) {} 1173 bool getSubClassData() const { return SubClassData; } 1174 unsigned getTypeQuals() const { return TypeQuals; } 1175public: 1176 1177 QualType getResultType() const { return ResultType; } 1178 1179 1180 static bool classof(const Type *T) { 1181 return T->getTypeClass() == FunctionNoProto || 1182 T->getTypeClass() == FunctionProto; 1183 } 1184 static bool classof(const FunctionType *) { return true; } 1185}; 1186 1187/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 1188/// no information available about its arguments. 1189class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 1190 FunctionNoProtoType(QualType Result, QualType Canonical) 1191 : FunctionType(FunctionNoProto, Result, false, 0, Canonical, 1192 /*Dependent=*/false) {} 1193 friend class ASTContext; // ASTContext creates these. 1194public: 1195 // No additional state past what FunctionType provides. 1196 1197 virtual void getAsStringInternal(std::string &InnerString) const; 1198 1199 void Profile(llvm::FoldingSetNodeID &ID) { 1200 Profile(ID, getResultType()); 1201 } 1202 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType) { 1203 ID.AddPointer(ResultType.getAsOpaquePtr()); 1204 } 1205 1206 static bool classof(const Type *T) { 1207 return T->getTypeClass() == FunctionNoProto; 1208 } 1209 static bool classof(const FunctionNoProtoType *) { return true; } 1210 1211protected: 1212 virtual void EmitImpl(llvm::Serializer& S) const; 1213 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 1214 friend class Type; 1215}; 1216 1217/// FunctionProtoType - Represents a prototype with argument type info, e.g. 1218/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 1219/// arguments, not as having a single void argument. 1220class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 1221 /// hasAnyDependentType - Determine whether there are any dependent 1222 /// types within the arguments passed in. 1223 static bool hasAnyDependentType(const QualType *ArgArray, unsigned numArgs) { 1224 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 1225 if (ArgArray[Idx]->isDependentType()) 1226 return true; 1227 1228 return false; 1229 } 1230 1231 FunctionProtoType(QualType Result, const QualType *ArgArray, unsigned numArgs, 1232 bool isVariadic, unsigned typeQuals, QualType Canonical) 1233 : FunctionType(FunctionProto, Result, isVariadic, typeQuals, Canonical, 1234 (Result->isDependentType() || 1235 hasAnyDependentType(ArgArray, numArgs))), 1236 NumArgs(numArgs) { 1237 // Fill in the trailing argument array. 1238 QualType *ArgInfo = reinterpret_cast<QualType *>(this+1);; 1239 for (unsigned i = 0; i != numArgs; ++i) 1240 ArgInfo[i] = ArgArray[i]; 1241 } 1242 1243 /// NumArgs - The number of arguments this function has, not counting '...'. 1244 unsigned NumArgs; 1245 1246 /// ArgInfo - There is an variable size array after the class in memory that 1247 /// holds the argument types. 1248 1249 friend class ASTContext; // ASTContext creates these. 1250 1251public: 1252 unsigned getNumArgs() const { return NumArgs; } 1253 QualType getArgType(unsigned i) const { 1254 assert(i < NumArgs && "Invalid argument number!"); 1255 return arg_type_begin()[i]; 1256 } 1257 1258 bool isVariadic() const { return getSubClassData(); } 1259 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 1260 1261 typedef const QualType *arg_type_iterator; 1262 arg_type_iterator arg_type_begin() const { 1263 return reinterpret_cast<const QualType *>(this+1); 1264 } 1265 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 1266 1267 virtual void getAsStringInternal(std::string &InnerString) const; 1268 1269 static bool classof(const Type *T) { 1270 return T->getTypeClass() == FunctionProto; 1271 } 1272 static bool classof(const FunctionProtoType *) { return true; } 1273 1274 void Profile(llvm::FoldingSetNodeID &ID); 1275 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 1276 arg_type_iterator ArgTys, unsigned NumArgs, 1277 bool isVariadic, unsigned TypeQuals); 1278 1279protected: 1280 virtual void EmitImpl(llvm::Serializer& S) const; 1281 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 1282 friend class Type; 1283}; 1284 1285 1286class TypedefType : public Type { 1287 TypedefDecl *Decl; 1288protected: 1289 TypedefType(TypeClass tc, TypedefDecl *D, QualType can) 1290 : Type(tc, can, can->isDependentType()), Decl(D) { 1291 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1292 } 1293 friend class ASTContext; // ASTContext creates these. 1294public: 1295 1296 TypedefDecl *getDecl() const { return Decl; } 1297 1298 /// LookThroughTypedefs - Return the ultimate type this typedef corresponds to 1299 /// potentially looking through *all* consecutive typedefs. This returns the 1300 /// sum of the type qualifiers, so if you have: 1301 /// typedef const int A; 1302 /// typedef volatile A B; 1303 /// looking through the typedefs for B will give you "const volatile A". 1304 QualType LookThroughTypedefs() const; 1305 1306 virtual void getAsStringInternal(std::string &InnerString) const; 1307 1308 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 1309 static bool classof(const TypedefType *) { return true; } 1310 1311protected: 1312 virtual void EmitImpl(llvm::Serializer& S) const; 1313 static Type* CreateImpl(ASTContext& Context,llvm::Deserializer& D); 1314 friend class Type; 1315}; 1316 1317/// TypeOfExprType (GCC extension). 1318class TypeOfExprType : public Type { 1319 Expr *TOExpr; 1320 TypeOfExprType(Expr *E, QualType can); 1321 friend class ASTContext; // ASTContext creates these. 1322public: 1323 Expr *getUnderlyingExpr() const { return TOExpr; } 1324 1325 virtual void getAsStringInternal(std::string &InnerString) const; 1326 1327 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 1328 static bool classof(const TypeOfExprType *) { return true; } 1329 1330protected: 1331 virtual void EmitImpl(llvm::Serializer& S) const; 1332 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 1333 friend class Type; 1334}; 1335 1336/// TypeOfType (GCC extension). 1337class TypeOfType : public Type { 1338 QualType TOType; 1339 TypeOfType(QualType T, QualType can) 1340 : Type(TypeOf, can, T->isDependentType()), TOType(T) { 1341 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1342 } 1343 friend class ASTContext; // ASTContext creates these. 1344public: 1345 QualType getUnderlyingType() const { return TOType; } 1346 1347 virtual void getAsStringInternal(std::string &InnerString) const; 1348 1349 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 1350 static bool classof(const TypeOfType *) { return true; } 1351 1352protected: 1353 virtual void EmitImpl(llvm::Serializer& S) const; 1354 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 1355 friend class Type; 1356}; 1357 1358class TagType : public Type { 1359 /// Stores the TagDecl associated with this type. The decl will 1360 /// point to the TagDecl that actually defines the entity (or is a 1361 /// definition in progress), if there is such a definition. The 1362 /// single-bit value will be non-zero when this tag is in the 1363 /// process of being defined. 1364 mutable llvm::PointerIntPair<TagDecl *, 1> decl; 1365 friend class ASTContext; 1366 friend class TagDecl; 1367 1368protected: 1369 // FIXME: We'll need the user to pass in information about whether 1370 // this type is dependent or not, because we don't have enough 1371 // information to compute it here. 1372 TagType(TypeClass TC, TagDecl *D, QualType can) 1373 : Type(TC, can, /*Dependent=*/false), decl(D, 0) {} 1374 1375public: 1376 TagDecl *getDecl() const { return decl.getPointer(); } 1377 1378 /// @brief Determines whether this type is in the process of being 1379 /// defined. 1380 bool isBeingDefined() const { return decl.getInt(); } 1381 void setBeingDefined(bool Def) { decl.setInt(Def? 1 : 0); } 1382 1383 virtual void getAsStringInternal(std::string &InnerString) const; 1384 void getAsStringInternal(std::string &InnerString, 1385 bool SuppressTagKind) const; 1386 1387 static bool classof(const Type *T) { 1388 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 1389 } 1390 static bool classof(const TagType *) { return true; } 1391 static bool classof(const RecordType *) { return true; } 1392 static bool classof(const EnumType *) { return true; } 1393 1394protected: 1395 virtual void EmitImpl(llvm::Serializer& S) const; 1396 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 1397 friend class Type; 1398}; 1399 1400/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 1401/// to detect TagType objects of structs/unions/classes. 1402class RecordType : public TagType { 1403protected: 1404 explicit RecordType(RecordDecl *D) 1405 : TagType(Record, reinterpret_cast<TagDecl*>(D), QualType()) { } 1406 explicit RecordType(TypeClass TC, RecordDecl *D) 1407 : TagType(TC, reinterpret_cast<TagDecl*>(D), QualType()) { } 1408 friend class ASTContext; // ASTContext creates these. 1409public: 1410 1411 RecordDecl *getDecl() const { 1412 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 1413 } 1414 1415 // FIXME: This predicate is a helper to QualType/Type. It needs to 1416 // recursively check all fields for const-ness. If any field is declared 1417 // const, it needs to return false. 1418 bool hasConstFields() const { return false; } 1419 1420 // FIXME: RecordType needs to check when it is created that all fields are in 1421 // the same address space, and return that. 1422 unsigned getAddressSpace() const { return 0; } 1423 1424 static bool classof(const TagType *T); 1425 static bool classof(const Type *T) { 1426 return isa<TagType>(T) && classof(cast<TagType>(T)); 1427 } 1428 static bool classof(const RecordType *) { return true; } 1429}; 1430 1431/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 1432/// to detect TagType objects of enums. 1433class EnumType : public TagType { 1434 explicit EnumType(EnumDecl *D) 1435 : TagType(Enum, reinterpret_cast<TagDecl*>(D), QualType()) { } 1436 friend class ASTContext; // ASTContext creates these. 1437public: 1438 1439 EnumDecl *getDecl() const { 1440 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 1441 } 1442 1443 static bool classof(const TagType *T); 1444 static bool classof(const Type *T) { 1445 return isa<TagType>(T) && classof(cast<TagType>(T)); 1446 } 1447 static bool classof(const EnumType *) { return true; } 1448}; 1449 1450class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 1451 unsigned Depth : 16; 1452 unsigned Index : 16; 1453 IdentifierInfo *Name; 1454 1455 TemplateTypeParmType(unsigned D, unsigned I, IdentifierInfo *N, 1456 QualType Canon) 1457 : Type(TemplateTypeParm, Canon, /*Dependent=*/true), 1458 Depth(D), Index(I), Name(N) { } 1459 1460 TemplateTypeParmType(unsigned D, unsigned I) 1461 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true), 1462 Depth(D), Index(I), Name(0) { } 1463 1464 friend class ASTContext; // ASTContext creates these 1465 1466public: 1467 unsigned getDepth() const { return Depth; } 1468 unsigned getIndex() const { return Index; } 1469 IdentifierInfo *getName() const { return Name; } 1470 1471 virtual void getAsStringInternal(std::string &InnerString) const; 1472 1473 void Profile(llvm::FoldingSetNodeID &ID) { 1474 Profile(ID, Depth, Index, Name); 1475 } 1476 1477 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 1478 unsigned Index, IdentifierInfo *Name) { 1479 ID.AddInteger(Depth); 1480 ID.AddInteger(Index); 1481 ID.AddPointer(Name); 1482 } 1483 1484 static bool classof(const Type *T) { 1485 return T->getTypeClass() == TemplateTypeParm; 1486 } 1487 static bool classof(const TemplateTypeParmType *T) { return true; } 1488 1489protected: 1490 virtual void EmitImpl(llvm::Serializer& S) const; 1491 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 1492 friend class Type; 1493}; 1494 1495/// \brief Represents the type of a class template specialization as 1496/// written in the source code. 1497/// 1498/// Class template specialization types represent the syntactic form 1499/// of a template-id that refers to a type, e.g., @c vector<int>. All 1500/// class template specialization types are syntactic sugar, whose 1501/// canonical type will point to some other type node that represents 1502/// the instantiation or class template specialization. For example, a 1503/// class template specialization type of @c vector<int> will refer to 1504/// a tag type for the instantiation 1505/// @c std::vector<int, std::allocator<int>>. 1506class ClassTemplateSpecializationType 1507 : public Type, public llvm::FoldingSetNode { 1508 1509 // FIXME: Do we want templates to have a representation in the type 1510 // system? It will probably help with dependent templates and 1511 // possibly with template-names preceded by a nested-name-specifier. 1512 TemplateDecl *Template; 1513 1514 /// \brief - The number of template arguments named in this class 1515 /// template specialization. 1516 unsigned NumArgs; 1517 1518 ClassTemplateSpecializationType(TemplateDecl *T, 1519 const TemplateArgument *Args, 1520 unsigned NumArgs, QualType Canon); 1521 1522 virtual void Destroy(ASTContext& C); 1523 1524 friend class ASTContext; // ASTContext creates these 1525 1526public: 1527 /// \brief Determine whether any of the given template arguments are 1528 /// dependent. 1529 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 1530 unsigned NumArgs); 1531 1532 /// \brief Print a template argument list, including the '<' and '>' 1533 /// enclosing the template arguments. 1534 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 1535 unsigned NumArgs); 1536 1537 typedef const TemplateArgument * iterator; 1538 1539 iterator begin() const { return getArgs(); } 1540 iterator end() const; 1541 1542 /// \brief Retrieve the template that we are specializing. 1543 TemplateDecl *getTemplate() const { return Template; } 1544 1545 /// \brief Retrieve the template arguments. 1546 const TemplateArgument *getArgs() const { 1547 return reinterpret_cast<const TemplateArgument *>(this + 1); 1548 } 1549 1550 /// \brief Retrieve the number of template arguments. 1551 unsigned getNumArgs() const { return NumArgs; } 1552 1553 /// \brief Retrieve a specific template argument as a type. 1554 /// \precondition @c isArgType(Arg) 1555 const TemplateArgument &getArg(unsigned Idx) const; 1556 1557 virtual void getAsStringInternal(std::string &InnerString) const; 1558 1559 void Profile(llvm::FoldingSetNodeID &ID) { 1560 Profile(ID, Template, getArgs(), NumArgs); 1561 } 1562 1563 static void Profile(llvm::FoldingSetNodeID &ID, TemplateDecl *T, 1564 const TemplateArgument *Args, unsigned NumArgs); 1565 1566 static bool classof(const Type *T) { 1567 return T->getTypeClass() == ClassTemplateSpecialization; 1568 } 1569 static bool classof(const ClassTemplateSpecializationType *T) { return true; } 1570 1571protected: 1572 virtual void EmitImpl(llvm::Serializer& S) const; 1573 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 1574 friend class Type; 1575}; 1576 1577/// \brief Represents a type that was referred to via a qualified 1578/// name, e.g., N::M::type. 1579/// 1580/// This type is used to keep track of a type name as written in the 1581/// source code, including any nested-name-specifiers. The type itself 1582/// is always "sugar", used to express what was written in the source 1583/// code but containing no additional semantic information. 1584class QualifiedNameType : public Type, public llvm::FoldingSetNode { 1585 /// \brief The nested name specifier containing the qualifier. 1586 NestedNameSpecifier *NNS; 1587 1588 /// \brief The type that this qualified name refers to. 1589 QualType NamedType; 1590 1591 QualifiedNameType(NestedNameSpecifier *NNS, QualType NamedType, 1592 QualType CanonType) 1593 : Type(QualifiedName, CanonType, NamedType->isDependentType()), 1594 NNS(NNS), NamedType(NamedType) { } 1595 1596 friend class ASTContext; // ASTContext creates these 1597 1598public: 1599 /// \brief Retrieve the qualification on this type. 1600 NestedNameSpecifier *getQualifier() const { return NNS; } 1601 1602 /// \brief Retrieve the type named by the qualified-id. 1603 QualType getNamedType() const { return NamedType; } 1604 1605 virtual void getAsStringInternal(std::string &InnerString) const; 1606 1607 void Profile(llvm::FoldingSetNodeID &ID) { 1608 Profile(ID, NNS, NamedType); 1609 } 1610 1611 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 1612 QualType NamedType) { 1613 ID.AddPointer(NNS); 1614 NamedType.Profile(ID); 1615 } 1616 1617 static bool classof(const Type *T) { 1618 return T->getTypeClass() == QualifiedName; 1619 } 1620 static bool classof(const QualifiedNameType *T) { return true; } 1621 1622protected: 1623 virtual void EmitImpl(llvm::Serializer& S) const; 1624 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 1625 friend class Type; 1626}; 1627 1628/// \brief Represents a 'typename' specifier that names a type within 1629/// a dependent type, e.g., "typename T::type". 1630/// 1631/// TypenameType has a very similar structure to QualifiedNameType, 1632/// which also involves a nested-name-specifier following by a type, 1633/// and (FIXME!) both can even be prefixed by the 'typename' 1634/// keyword. However, the two types serve very different roles: 1635/// QualifiedNameType is a non-semantic type that serves only as sugar 1636/// to show how a particular type was written in the source 1637/// code. TypenameType, on the other hand, only occurs when the 1638/// nested-name-specifier is dependent, such that we cannot resolve 1639/// the actual type until after instantiation. 1640class TypenameType : public Type, public llvm::FoldingSetNode { 1641 /// \brief The nested name specifier containing the qualifier. 1642 NestedNameSpecifier *NNS; 1643 1644 /// \brief The type that this typename specifier refers to. 1645 /// FIXME: Also need to represent the "template simple-template-id" case. 1646 const IdentifierInfo *Name; 1647 1648 TypenameType(NestedNameSpecifier *NNS, const IdentifierInfo *Name, 1649 QualType CanonType) 1650 : Type(Typename, CanonType, true), NNS(NNS), Name(Name) { 1651 assert(NNS->isDependent() && 1652 "TypenameType requires a dependent nested-name-specifier"); 1653 } 1654 1655 friend class ASTContext; // ASTContext creates these 1656 1657public: 1658 /// \brief Retrieve the qualification on this type. 1659 NestedNameSpecifier *getQualifier() const { return NNS; } 1660 1661 /// \brief Retrieve the type named by the typename specifier. 1662 const IdentifierInfo *getName() const { return Name; } 1663 1664 virtual void getAsStringInternal(std::string &InnerString) const; 1665 1666 void Profile(llvm::FoldingSetNodeID &ID) { 1667 Profile(ID, NNS, Name); 1668 } 1669 1670 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 1671 const IdentifierInfo *Name) { 1672 ID.AddPointer(NNS); 1673 ID.AddPointer(Name); 1674 } 1675 1676 static bool classof(const Type *T) { 1677 return T->getTypeClass() == Typename; 1678 } 1679 static bool classof(const TypenameType *T) { return true; } 1680 1681protected: 1682 virtual void EmitImpl(llvm::Serializer& S) const; 1683 static Type* CreateImpl(ASTContext& Context, llvm::Deserializer& D); 1684 friend class Type; 1685}; 1686 1687/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 1688/// object oriented design. They basically correspond to C++ classes. There 1689/// are two kinds of interface types, normal interfaces like "NSString" and 1690/// qualified interfaces, which are qualified with a protocol list like 1691/// "NSString<NSCopyable, NSAmazing>". Qualified interface types are instances 1692/// of ObjCQualifiedInterfaceType, which is a subclass of ObjCInterfaceType. 1693class ObjCInterfaceType : public Type { 1694 ObjCInterfaceDecl *Decl; 1695protected: 1696 ObjCInterfaceType(TypeClass tc, ObjCInterfaceDecl *D) : 1697 Type(tc, QualType(), /*Dependent=*/false), Decl(D) { } 1698 friend class ASTContext; // ASTContext creates these. 1699public: 1700 1701 ObjCInterfaceDecl *getDecl() const { return Decl; } 1702 1703 /// qual_iterator and friends: this provides access to the (potentially empty) 1704 /// list of protocols qualifying this interface. If this is an instance of 1705 /// ObjCQualifiedInterfaceType it returns the list, otherwise it returns an 1706 /// empty list if there are no qualifying protocols. 1707 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 1708 inline qual_iterator qual_begin() const; 1709 inline qual_iterator qual_end() const; 1710 bool qual_empty() const { return getTypeClass() != ObjCQualifiedInterface; } 1711 1712 /// getNumProtocols - Return the number of qualifying protocols in this 1713 /// interface type, or 0 if there are none. 1714 inline unsigned getNumProtocols() const; 1715 1716 /// getProtocol - Return the specified qualifying protocol. 1717 inline ObjCProtocolDecl *getProtocol(unsigned i) const; 1718 1719 1720 virtual void getAsStringInternal(std::string &InnerString) const; 1721 static bool classof(const Type *T) { 1722 return T->getTypeClass() == ObjCInterface || 1723 T->getTypeClass() == ObjCQualifiedInterface; 1724 } 1725 static bool classof(const ObjCInterfaceType *) { return true; } 1726}; 1727 1728/// ObjCQualifiedInterfaceType - This class represents interface types 1729/// conforming to a list of protocols, such as INTF<Proto1, Proto2, Proto1>. 1730/// 1731/// Duplicate protocols are removed and protocol list is canonicalized to be in 1732/// alphabetical order. 1733class ObjCQualifiedInterfaceType : public ObjCInterfaceType, 1734 public llvm::FoldingSetNode { 1735 1736 // List of protocols for this protocol conforming object type 1737 // List is sorted on protocol name. No protocol is enterred more than once. 1738 llvm::SmallVector<ObjCProtocolDecl*, 4> Protocols; 1739 1740 ObjCQualifiedInterfaceType(ObjCInterfaceDecl *D, 1741 ObjCProtocolDecl **Protos, unsigned NumP) : 1742 ObjCInterfaceType(ObjCQualifiedInterface, D), 1743 Protocols(Protos, Protos+NumP) { } 1744 friend class ASTContext; // ASTContext creates these. 1745public: 1746 1747 ObjCProtocolDecl *getProtocol(unsigned i) const { 1748 return Protocols[i]; 1749 } 1750 unsigned getNumProtocols() const { 1751 return Protocols.size(); 1752 } 1753 1754 qual_iterator qual_begin() const { return Protocols.begin(); } 1755 qual_iterator qual_end() const { return Protocols.end(); } 1756 1757 virtual void getAsStringInternal(std::string &InnerString) const; 1758 1759 void Profile(llvm::FoldingSetNodeID &ID); 1760 static void Profile(llvm::FoldingSetNodeID &ID, 1761 const ObjCInterfaceDecl *Decl, 1762 ObjCProtocolDecl **protocols, unsigned NumProtocols); 1763 1764 static bool classof(const Type *T) { 1765 return T->getTypeClass() == ObjCQualifiedInterface; 1766 } 1767 static bool classof(const ObjCQualifiedInterfaceType *) { return true; } 1768}; 1769 1770inline ObjCInterfaceType::qual_iterator ObjCInterfaceType::qual_begin() const { 1771 if (const ObjCQualifiedInterfaceType *QIT = 1772 dyn_cast<ObjCQualifiedInterfaceType>(this)) 1773 return QIT->qual_begin(); 1774 return 0; 1775} 1776inline ObjCInterfaceType::qual_iterator ObjCInterfaceType::qual_end() const { 1777 if (const ObjCQualifiedInterfaceType *QIT = 1778 dyn_cast<ObjCQualifiedInterfaceType>(this)) 1779 return QIT->qual_end(); 1780 return 0; 1781} 1782 1783/// getNumProtocols - Return the number of qualifying protocols in this 1784/// interface type, or 0 if there are none. 1785inline unsigned ObjCInterfaceType::getNumProtocols() const { 1786 if (const ObjCQualifiedInterfaceType *QIT = 1787 dyn_cast<ObjCQualifiedInterfaceType>(this)) 1788 return QIT->getNumProtocols(); 1789 return 0; 1790} 1791 1792/// getProtocol - Return the specified qualifying protocol. 1793inline ObjCProtocolDecl *ObjCInterfaceType::getProtocol(unsigned i) const { 1794 return cast<ObjCQualifiedInterfaceType>(this)->getProtocol(i); 1795} 1796 1797 1798 1799/// ObjCQualifiedIdType - to represent id<protocol-list>. 1800/// 1801/// Duplicate protocols are removed and protocol list is canonicalized to be in 1802/// alphabetical order. 1803class ObjCQualifiedIdType : public Type, 1804 public llvm::FoldingSetNode { 1805 // List of protocols for this protocol conforming 'id' type 1806 // List is sorted on protocol name. No protocol is enterred more than once. 1807 llvm::SmallVector<ObjCProtocolDecl*, 8> Protocols; 1808 1809 ObjCQualifiedIdType(ObjCProtocolDecl **Protos, unsigned NumP) 1810 : Type(ObjCQualifiedId, QualType()/*these are always canonical*/, 1811 /*Dependent=*/false), 1812 Protocols(Protos, Protos+NumP) { } 1813 friend class ASTContext; // ASTContext creates these. 1814public: 1815 1816 ObjCProtocolDecl *getProtocols(unsigned i) const { 1817 return Protocols[i]; 1818 } 1819 unsigned getNumProtocols() const { 1820 return Protocols.size(); 1821 } 1822 ObjCProtocolDecl **getReferencedProtocols() { 1823 return &Protocols[0]; 1824 } 1825 1826 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 1827 qual_iterator qual_begin() const { return Protocols.begin(); } 1828 qual_iterator qual_end() const { return Protocols.end(); } 1829 1830 virtual void getAsStringInternal(std::string &InnerString) const; 1831 1832 void Profile(llvm::FoldingSetNodeID &ID); 1833 static void Profile(llvm::FoldingSetNodeID &ID, 1834 ObjCProtocolDecl **protocols, unsigned NumProtocols); 1835 1836 static bool classof(const Type *T) { 1837 return T->getTypeClass() == ObjCQualifiedId; 1838 } 1839 static bool classof(const ObjCQualifiedIdType *) { return true; } 1840 1841}; 1842 1843/// ObjCQualifiedClassType - to represent Class<protocol-list>. 1844/// 1845/// Duplicate protocols are removed and protocol list is canonicalized to be in 1846/// alphabetical order. 1847class ObjCQualifiedClassType : public Type, 1848 public llvm::FoldingSetNode { 1849 // List of protocols for this protocol conforming 'id' type 1850 // List is sorted on protocol name. No protocol is enterred more than once. 1851 llvm::SmallVector<ObjCProtocolDecl*, 8> Protocols; 1852 1853 ObjCQualifiedClassType(ObjCProtocolDecl **Protos, unsigned NumP) 1854 : Type(ObjCQualifiedClass, QualType()/*these are always canonical*/, 1855 /*Dependent=*/false), 1856 Protocols(Protos, Protos+NumP) { } 1857 friend class ASTContext; // ASTContext creates these. 1858public: 1859 1860 ObjCProtocolDecl *getProtocols(unsigned i) const { 1861 return Protocols[i]; 1862 } 1863 unsigned getNumProtocols() const { 1864 return Protocols.size(); 1865 } 1866 ObjCProtocolDecl **getReferencedProtocols() { 1867 return &Protocols[0]; 1868 } 1869 1870 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 1871 qual_iterator qual_begin() const { return Protocols.begin(); } 1872 qual_iterator qual_end() const { return Protocols.end(); } 1873 1874 virtual void getAsStringInternal(std::string &InnerString) const; 1875 1876 void Profile(llvm::FoldingSetNodeID &ID); 1877 static void Profile(llvm::FoldingSetNodeID &ID, 1878 ObjCProtocolDecl **protocols, unsigned NumProtocols); 1879 1880 static bool classof(const Type *T) { 1881 return T->getTypeClass() == ObjCQualifiedClass; 1882 } 1883 static bool classof(const ObjCQualifiedClassType *) { return true; } 1884 1885}; 1886 1887// Inline function definitions. 1888 1889/// getUnqualifiedType - Return the type without any qualifiers. 1890inline QualType QualType::getUnqualifiedType() const { 1891 Type *TP = getTypePtr(); 1892 if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(TP)) 1893 TP = EXTQT->getBaseType(); 1894 return QualType(TP, 0); 1895} 1896 1897/// getAddressSpace - Return the address space of this type. 1898inline unsigned QualType::getAddressSpace() const { 1899 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 1900 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 1901 return AT->getElementType().getAddressSpace(); 1902 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 1903 return RT->getAddressSpace(); 1904 if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(CT)) 1905 return EXTQT->getAddressSpace(); 1906 return 0; 1907} 1908 1909/// getObjCGCAttr - Return the gc attribute of this type. 1910inline QualType::GCAttrTypes QualType::getObjCGCAttr() const { 1911 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 1912 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 1913 return AT->getElementType().getObjCGCAttr(); 1914 if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(CT)) 1915 return EXTQT->getObjCGCAttr(); 1916 if (const PointerType *PT = CT->getAsPointerType()) 1917 return PT->getPointeeType().getObjCGCAttr(); 1918 return GCNone; 1919} 1920 1921/// isMoreQualifiedThan - Determine whether this type is more 1922/// qualified than the Other type. For example, "const volatile int" 1923/// is more qualified than "const int", "volatile int", and 1924/// "int". However, it is not more qualified than "const volatile 1925/// int". 1926inline bool QualType::isMoreQualifiedThan(QualType Other) const { 1927 // FIXME: Handle address spaces 1928 unsigned MyQuals = this->getCVRQualifiers(); 1929 unsigned OtherQuals = Other.getCVRQualifiers(); 1930 assert(this->getAddressSpace() == 0 && "Address space not checked"); 1931 assert(Other.getAddressSpace() == 0 && "Address space not checked"); 1932 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 1933} 1934 1935/// isAtLeastAsQualifiedAs - Determine whether this type is at last 1936/// as qualified as the Other type. For example, "const volatile 1937/// int" is at least as qualified as "const int", "volatile int", 1938/// "int", and "const volatile int". 1939inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 1940 // FIXME: Handle address spaces 1941 unsigned MyQuals = this->getCVRQualifiers(); 1942 unsigned OtherQuals = Other.getCVRQualifiers(); 1943 assert(this->getAddressSpace() == 0 && "Address space not checked"); 1944 assert(Other.getAddressSpace() == 0 && "Address space not checked"); 1945 return (MyQuals | OtherQuals) == MyQuals; 1946} 1947 1948/// getNonReferenceType - If Type is a reference type (e.g., const 1949/// int&), returns the type that the reference refers to ("const 1950/// int"). Otherwise, returns the type itself. This routine is used 1951/// throughout Sema to implement C++ 5p6: 1952/// 1953/// If an expression initially has the type "reference to T" (8.3.2, 1954/// 8.5.3), the type is adjusted to "T" prior to any further 1955/// analysis, the expression designates the object or function 1956/// denoted by the reference, and the expression is an lvalue. 1957inline QualType QualType::getNonReferenceType() const { 1958 if (const ReferenceType *RefType = (*this)->getAsReferenceType()) 1959 return RefType->getPointeeType(); 1960 else 1961 return *this; 1962} 1963 1964inline const TypedefType* Type::getAsTypedefType() const { 1965 return dyn_cast<TypedefType>(this); 1966} 1967inline const ObjCInterfaceType *Type::getAsPointerToObjCInterfaceType() const { 1968 if (const PointerType *PT = getAsPointerType()) 1969 return PT->getPointeeType()->getAsObjCInterfaceType(); 1970 return 0; 1971} 1972 1973// NOTE: All of these methods use "getUnqualifiedType" to strip off address 1974// space qualifiers if present. 1975inline bool Type::isFunctionType() const { 1976 return isa<FunctionType>(CanonicalType.getUnqualifiedType()); 1977} 1978inline bool Type::isPointerType() const { 1979 return isa<PointerType>(CanonicalType.getUnqualifiedType()); 1980} 1981inline bool Type::isBlockPointerType() const { 1982 return isa<BlockPointerType>(CanonicalType); 1983} 1984inline bool Type::isReferenceType() const { 1985 return isa<ReferenceType>(CanonicalType.getUnqualifiedType()); 1986} 1987inline bool Type::isLValueReferenceType() const { 1988 return isa<LValueReferenceType>(CanonicalType.getUnqualifiedType()); 1989} 1990inline bool Type::isRValueReferenceType() const { 1991 return isa<RValueReferenceType>(CanonicalType.getUnqualifiedType()); 1992} 1993inline bool Type::isFunctionPointerType() const { 1994 if (const PointerType* T = getAsPointerType()) 1995 return T->getPointeeType()->isFunctionType(); 1996 else 1997 return false; 1998} 1999inline bool Type::isMemberPointerType() const { 2000 return isa<MemberPointerType>(CanonicalType.getUnqualifiedType()); 2001} 2002inline bool Type::isMemberFunctionPointerType() const { 2003 if (const MemberPointerType* T = getAsMemberPointerType()) 2004 return T->getPointeeType()->isFunctionType(); 2005 else 2006 return false; 2007} 2008inline bool Type::isArrayType() const { 2009 return isa<ArrayType>(CanonicalType.getUnqualifiedType()); 2010} 2011inline bool Type::isConstantArrayType() const { 2012 return isa<ConstantArrayType>(CanonicalType.getUnqualifiedType()); 2013} 2014inline bool Type::isIncompleteArrayType() const { 2015 return isa<IncompleteArrayType>(CanonicalType.getUnqualifiedType()); 2016} 2017inline bool Type::isVariableArrayType() const { 2018 return isa<VariableArrayType>(CanonicalType.getUnqualifiedType()); 2019} 2020inline bool Type::isDependentSizedArrayType() const { 2021 return isa<DependentSizedArrayType>(CanonicalType.getUnqualifiedType()); 2022} 2023inline bool Type::isRecordType() const { 2024 return isa<RecordType>(CanonicalType.getUnqualifiedType()); 2025} 2026inline bool Type::isAnyComplexType() const { 2027 return isa<ComplexType>(CanonicalType.getUnqualifiedType()); 2028} 2029inline bool Type::isVectorType() const { 2030 return isa<VectorType>(CanonicalType.getUnqualifiedType()); 2031} 2032inline bool Type::isExtVectorType() const { 2033 return isa<ExtVectorType>(CanonicalType.getUnqualifiedType()); 2034} 2035inline bool Type::isObjCInterfaceType() const { 2036 return isa<ObjCInterfaceType>(CanonicalType.getUnqualifiedType()); 2037} 2038inline bool Type::isObjCQualifiedInterfaceType() const { 2039 return isa<ObjCQualifiedInterfaceType>(CanonicalType.getUnqualifiedType()); 2040} 2041inline bool Type::isObjCQualifiedIdType() const { 2042 return isa<ObjCQualifiedIdType>(CanonicalType.getUnqualifiedType()); 2043} 2044inline bool Type::isTemplateTypeParmType() const { 2045 return isa<TemplateTypeParmType>(CanonicalType.getUnqualifiedType()); 2046} 2047 2048inline bool Type::isSpecificBuiltinType(unsigned K) const { 2049 if (const BuiltinType *BT = getAsBuiltinType()) 2050 if (BT->getKind() == (BuiltinType::Kind) K) 2051 return true; 2052 return false; 2053} 2054 2055/// \brief Determines whether this is a type for which one can define 2056/// an overloaded operator. 2057inline bool Type::isOverloadableType() const { 2058 return isDependentType() || isRecordType() || isEnumeralType(); 2059} 2060 2061inline bool Type::hasPointerRepresentation() const { 2062 return (isPointerType() || isReferenceType() || isBlockPointerType() || 2063 isObjCInterfaceType() || isObjCQualifiedIdType() || 2064 isObjCQualifiedInterfaceType()); 2065} 2066 2067inline bool Type::hasObjCPointerRepresentation() const { 2068 return (isObjCInterfaceType() || isObjCQualifiedIdType() || 2069 isObjCQualifiedInterfaceType()); 2070} 2071 2072/// Insertion operator for diagnostics. This allows sending QualType's into a 2073/// diagnostic with <<. 2074inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 2075 QualType T) { 2076 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 2077 Diagnostic::ak_qualtype); 2078 return DB; 2079} 2080 2081} // end namespace clang 2082 2083#endif 2084