Type.h revision efadb7768e7c7418185f5a4010ecd8b21ca9731b
1//===--- Type.h - C Language Family Type Representation ---------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Type interface and subclasses. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_CLANG_AST_TYPE_H 15#define LLVM_CLANG_AST_TYPE_H 16 17#include "clang/Basic/Diagnostic.h" 18#include "clang/Basic/IdentifierTable.h" 19#include "clang/AST/NestedNameSpecifier.h" 20#include "clang/AST/TemplateName.h" 21#include "llvm/Support/Casting.h" 22#include "llvm/ADT/APSInt.h" 23#include "llvm/ADT/FoldingSet.h" 24#include "llvm/ADT/PointerIntPair.h" 25#include "llvm/ADT/PointerUnion.h" 26 27using llvm::isa; 28using llvm::cast; 29using llvm::cast_or_null; 30using llvm::dyn_cast; 31using llvm::dyn_cast_or_null; 32namespace clang { class Type; } 33 34namespace llvm { 35 template <typename T> 36 class PointerLikeTypeTraits; 37 template<> 38 class PointerLikeTypeTraits< ::clang::Type*> { 39 public: 40 static inline void *getAsVoidPointer(::clang::Type *P) { return P; } 41 static inline ::clang::Type *getFromVoidPointer(void *P) { 42 return static_cast< ::clang::Type*>(P); 43 } 44 enum { NumLowBitsAvailable = 3 }; 45 }; 46} 47 48namespace clang { 49 class ASTContext; 50 class TypedefDecl; 51 class TemplateDecl; 52 class TemplateTypeParmDecl; 53 class NonTypeTemplateParmDecl; 54 class TemplateTemplateParmDecl; 55 class TagDecl; 56 class RecordDecl; 57 class CXXRecordDecl; 58 class EnumDecl; 59 class FieldDecl; 60 class ObjCInterfaceDecl; 61 class ObjCProtocolDecl; 62 class ObjCMethodDecl; 63 class Expr; 64 class Stmt; 65 class SourceLocation; 66 class StmtIteratorBase; 67 class TemplateArgument; 68 class QualifiedNameType; 69 struct PrintingPolicy; 70 71 // Provide forward declarations for all of the *Type classes 72#define TYPE(Class, Base) class Class##Type; 73#include "clang/AST/TypeNodes.def" 74 75/// QualType - For efficiency, we don't store CVR-qualified types as nodes on 76/// their own: instead each reference to a type stores the qualifiers. This 77/// greatly reduces the number of nodes we need to allocate for types (for 78/// example we only need one for 'int', 'const int', 'volatile int', 79/// 'const volatile int', etc). 80/// 81/// As an added efficiency bonus, instead of making this a pair, we just store 82/// the three bits we care about in the low bits of the pointer. To handle the 83/// packing/unpacking, we make QualType be a simple wrapper class that acts like 84/// a smart pointer. 85class QualType { 86 llvm::PointerIntPair<Type*, 3> Value; 87public: 88 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 89 Const = 0x1, 90 Restrict = 0x2, 91 Volatile = 0x4, 92 CVRFlags = Const|Restrict|Volatile 93 }; 94 95 enum GCAttrTypes { 96 GCNone = 0, 97 Weak, 98 Strong 99 }; 100 101 // 24 bits should be enough for anyone. 102 static const unsigned MaxAddressSpace = 0xffffffu; 103 104 QualType() {} 105 106 QualType(const Type *Ptr, unsigned Quals) 107 : Value(const_cast<Type*>(Ptr), Quals) {} 108 109 unsigned getCVRQualifiers() const { return Value.getInt(); } 110 void setCVRQualifiers(unsigned Quals) { Value.setInt(Quals); } 111 Type *getTypePtr() const { return Value.getPointer(); } 112 113 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 114 static QualType getFromOpaquePtr(void *Ptr) { 115 QualType T; 116 T.Value.setFromOpaqueValue(Ptr); 117 return T; 118 } 119 120 Type &operator*() const { 121 return *getTypePtr(); 122 } 123 124 Type *operator->() const { 125 return getTypePtr(); 126 } 127 128 /// isNull - Return true if this QualType doesn't point to a type yet. 129 bool isNull() const { 130 return getTypePtr() == 0; 131 } 132 133 bool isConstQualified() const { 134 return (getCVRQualifiers() & Const) ? true : false; 135 } 136 bool isVolatileQualified() const { 137 return (getCVRQualifiers() & Volatile) ? true : false; 138 } 139 bool isRestrictQualified() const { 140 return (getCVRQualifiers() & Restrict) ? true : false; 141 } 142 143 bool isConstant(ASTContext& Ctx) const; 144 145 /// addConst/addVolatile/addRestrict - add the specified type qual to this 146 /// QualType. 147 void addConst() { Value.setInt(Value.getInt() | Const); } 148 void addVolatile() { Value.setInt(Value.getInt() | Volatile); } 149 void addRestrict() { Value.setInt(Value.getInt() | Restrict); } 150 151 void removeConst() { Value.setInt(Value.getInt() & ~Const); } 152 void removeVolatile() { Value.setInt(Value.getInt() & ~Volatile); } 153 void removeRestrict() { Value.setInt(Value.getInt() & ~Restrict); } 154 155 QualType getQualifiedType(unsigned TQs) const { 156 return QualType(getTypePtr(), TQs); 157 } 158 QualType getWithAdditionalQualifiers(unsigned TQs) const { 159 return QualType(getTypePtr(), TQs|getCVRQualifiers()); 160 } 161 162 QualType withConst() const { return getWithAdditionalQualifiers(Const); } 163 QualType withVolatile() const { return getWithAdditionalQualifiers(Volatile);} 164 QualType withRestrict() const { return getWithAdditionalQualifiers(Restrict);} 165 166 QualType getUnqualifiedType() const; 167 bool isMoreQualifiedThan(QualType Other) const; 168 bool isAtLeastAsQualifiedAs(QualType Other) const; 169 QualType getNonReferenceType() const; 170 171 /// getDesugaredType - Return the specified type with any "sugar" removed from 172 /// the type. This takes off typedefs, typeof's etc. If the outer level of 173 /// the type is already concrete, it returns it unmodified. This is similar 174 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 175 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 176 /// concrete. 177 QualType getDesugaredType(bool ForDisplay = false) const; 178 179 /// operator==/!= - Indicate whether the specified types and qualifiers are 180 /// identical. 181 bool operator==(const QualType &RHS) const { 182 return Value == RHS.Value; 183 } 184 bool operator!=(const QualType &RHS) const { 185 return Value != RHS.Value; 186 } 187 std::string getAsString() const; 188 189 std::string getAsString(const PrintingPolicy &Policy) const { 190 std::string S; 191 getAsStringInternal(S, Policy); 192 return S; 193 } 194 void getAsStringInternal(std::string &Str, 195 const PrintingPolicy &Policy) const; 196 197 void dump(const char *s) const; 198 void dump() const; 199 200 void Profile(llvm::FoldingSetNodeID &ID) const { 201 ID.AddPointer(getAsOpaquePtr()); 202 } 203 204public: 205 206 /// getAddressSpace - Return the address space of this type. 207 inline unsigned getAddressSpace() const; 208 209 /// GCAttrTypesAttr - Returns gc attribute of this type. 210 inline QualType::GCAttrTypes getObjCGCAttr() const; 211 212 /// isObjCGCWeak true when Type is objc's weak. 213 bool isObjCGCWeak() const { 214 return getObjCGCAttr() == Weak; 215 } 216 217 /// isObjCGCStrong true when Type is objc's strong. 218 bool isObjCGCStrong() const { 219 return getObjCGCAttr() == Strong; 220 } 221 222 /// getNoReturnAttr - Returns true if the type has the noreturn attribute, 223 /// false otherwise. 224 bool getNoReturnAttr() const; 225}; 226 227} // end clang. 228 229namespace llvm { 230/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 231/// to a specific Type class. 232template<> struct simplify_type<const ::clang::QualType> { 233 typedef ::clang::Type* SimpleType; 234 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 235 return Val.getTypePtr(); 236 } 237}; 238template<> struct simplify_type< ::clang::QualType> 239 : public simplify_type<const ::clang::QualType> {}; 240 241// Teach SmallPtrSet that QualType is "basically a pointer". 242template<> 243class PointerLikeTypeTraits<clang::QualType> { 244public: 245 static inline void *getAsVoidPointer(clang::QualType P) { 246 return P.getAsOpaquePtr(); 247 } 248 static inline clang::QualType getFromVoidPointer(void *P) { 249 return clang::QualType::getFromOpaquePtr(P); 250 } 251 // CVR qualifiers go in low bits. 252 enum { NumLowBitsAvailable = 0 }; 253}; 254} // end namespace llvm 255 256namespace clang { 257 258/// Type - This is the base class of the type hierarchy. A central concept 259/// with types is that each type always has a canonical type. A canonical type 260/// is the type with any typedef names stripped out of it or the types it 261/// references. For example, consider: 262/// 263/// typedef int foo; 264/// typedef foo* bar; 265/// 'int *' 'foo *' 'bar' 266/// 267/// There will be a Type object created for 'int'. Since int is canonical, its 268/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 269/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 270/// there is a PointerType that represents 'int*', which, like 'int', is 271/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 272/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 273/// is also 'int*'. 274/// 275/// Non-canonical types are useful for emitting diagnostics, without losing 276/// information about typedefs being used. Canonical types are useful for type 277/// comparisons (they allow by-pointer equality tests) and useful for reasoning 278/// about whether something has a particular form (e.g. is a function type), 279/// because they implicitly, recursively, strip all typedefs out of a type. 280/// 281/// Types, once created, are immutable. 282/// 283class Type { 284public: 285 enum TypeClass { 286#define TYPE(Class, Base) Class, 287#define ABSTRACT_TYPE(Class, Base) 288#include "clang/AST/TypeNodes.def" 289 TagFirst = Record, TagLast = Enum 290 }; 291 292private: 293 QualType CanonicalType; 294 295 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 296 bool Dependent : 1; 297 298 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 299 /// Note that this should stay at the end of the ivars for Type so that 300 /// subclasses can pack their bitfields into the same word. 301 unsigned TC : 6; 302 303 Type(const Type&); // DO NOT IMPLEMENT. 304 void operator=(const Type&); // DO NOT IMPLEMENT. 305protected: 306 // silence VC++ warning C4355: 'this' : used in base member initializer list 307 Type *this_() { return this; } 308 Type(TypeClass tc, QualType Canonical, bool dependent) 309 : CanonicalType(Canonical.isNull() ? QualType(this_(), 0) : Canonical), 310 Dependent(dependent), TC(tc) {} 311 virtual ~Type() {} 312 virtual void Destroy(ASTContext& C); 313 friend class ASTContext; 314 315public: 316 TypeClass getTypeClass() const { return static_cast<TypeClass>(TC); } 317 318 bool isCanonical() const { return CanonicalType.getTypePtr() == this; } 319 320 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 321 /// object types, function types, and incomplete types. 322 323 /// \brief Determines whether the type describes an object in memory. 324 /// 325 /// Note that this definition of object type corresponds to the C++ 326 /// definition of object type, which includes incomplete types, as 327 /// opposed to the C definition (which does not include incomplete 328 /// types). 329 bool isObjectType() const; 330 331 /// isIncompleteType - Return true if this is an incomplete type. 332 /// A type that can describe objects, but which lacks information needed to 333 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 334 /// routine will need to determine if the size is actually required. 335 bool isIncompleteType() const; 336 337 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 338 /// type, in other words, not a function type. 339 bool isIncompleteOrObjectType() const { 340 return !isFunctionType(); 341 } 342 343 /// isPODType - Return true if this is a plain-old-data type (C++ 3.9p10). 344 bool isPODType() const; 345 346 /// isVariablyModifiedType (C99 6.7.5.2p2) - Return true for variable array 347 /// types that have a non-constant expression. This does not include "[]". 348 bool isVariablyModifiedType() const; 349 350 /// Helper methods to distinguish type categories. All type predicates 351 /// operate on the canonical type, ignoring typedefs and qualifiers. 352 353 /// isSpecificBuiltinType - Test for a particular builtin type. 354 bool isSpecificBuiltinType(unsigned K) const; 355 356 /// isIntegerType() does *not* include complex integers (a GCC extension). 357 /// isComplexIntegerType() can be used to test for complex integers. 358 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 359 bool isEnumeralType() const; 360 bool isBooleanType() const; 361 bool isCharType() const; 362 bool isWideCharType() const; 363 bool isIntegralType() const; 364 365 /// Floating point categories. 366 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 367 /// isComplexType() does *not* include complex integers (a GCC extension). 368 /// isComplexIntegerType() can be used to test for complex integers. 369 bool isComplexType() const; // C99 6.2.5p11 (complex) 370 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 371 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 372 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 373 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 374 bool isVoidType() const; // C99 6.2.5p19 375 bool isDerivedType() const; // C99 6.2.5p20 376 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 377 bool isAggregateType() const; 378 379 // Type Predicates: Check to see if this type is structurally the specified 380 // type, ignoring typedefs and qualifiers. 381 bool isFunctionType() const; 382 bool isFunctionNoProtoType() const { return getAsFunctionNoProtoType() != 0; } 383 bool isFunctionProtoType() const { return getAsFunctionProtoType() != 0; } 384 bool isPointerType() const; 385 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 386 bool isBlockPointerType() const; 387 bool isVoidPointerType() const; 388 bool isReferenceType() const; 389 bool isLValueReferenceType() const; 390 bool isRValueReferenceType() const; 391 bool isFunctionPointerType() const; 392 bool isMemberPointerType() const; 393 bool isMemberFunctionPointerType() const; 394 bool isArrayType() const; 395 bool isConstantArrayType() const; 396 bool isIncompleteArrayType() const; 397 bool isVariableArrayType() const; 398 bool isDependentSizedArrayType() const; 399 bool isRecordType() const; 400 bool isClassType() const; 401 bool isStructureType() const; 402 bool isUnionType() const; 403 bool isComplexIntegerType() const; // GCC _Complex integer type. 404 bool isVectorType() const; // GCC vector type. 405 bool isExtVectorType() const; // Extended vector type. 406 bool isObjCObjectPointerType() const; // Pointer to *any* ObjC object. 407 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 408 // for the common case. 409 bool isObjCInterfaceType() const; // NSString or NSString<foo> 410 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 411 bool isObjCQualifiedIdType() const; // id<foo> 412 bool isObjCQualifiedClassType() const; // Class<foo> 413 bool isObjCIdType() const; // id 414 bool isObjCClassType() const; // Class 415 bool isObjCBuiltinType() const; // 'id' or 'Class' 416 bool isTemplateTypeParmType() const; // C++ template type parameter 417 bool isNullPtrType() const; // C++0x nullptr_t 418 419 /// isDependentType - Whether this type is a dependent type, meaning 420 /// that its definition somehow depends on a template parameter 421 /// (C++ [temp.dep.type]). 422 bool isDependentType() const { return Dependent; } 423 bool isOverloadableType() const; 424 425 /// hasPointerRepresentation - Whether this type is represented 426 /// natively as a pointer; this includes pointers, references, block 427 /// pointers, and Objective-C interface, qualified id, and qualified 428 /// interface types, as well as nullptr_t. 429 bool hasPointerRepresentation() const; 430 431 /// hasObjCPointerRepresentation - Whether this type can represent 432 /// an objective pointer type for the purpose of GC'ability 433 bool hasObjCPointerRepresentation() const; 434 435 // Type Checking Functions: Check to see if this type is structurally the 436 // specified type, ignoring typedefs and qualifiers, and return a pointer to 437 // the best type we can. 438 const BuiltinType *getAsBuiltinType() const; 439 const FunctionType *getAsFunctionType() const; 440 const FunctionNoProtoType *getAsFunctionNoProtoType() const; 441 const FunctionProtoType *getAsFunctionProtoType() const; 442 const PointerType *getAsPointerType() const; 443 const BlockPointerType *getAsBlockPointerType() const; 444 const ReferenceType *getAsReferenceType() const; 445 const LValueReferenceType *getAsLValueReferenceType() const; 446 const RValueReferenceType *getAsRValueReferenceType() const; 447 const MemberPointerType *getAsMemberPointerType() const; 448 const TagType *getAsTagType() const; 449 const RecordType *getAsRecordType() const; 450 const RecordType *getAsStructureType() const; 451 /// NOTE: getAs*ArrayType are methods on ASTContext. 452 const TypedefType *getAsTypedefType() const; 453 const RecordType *getAsUnionType() const; 454 const EnumType *getAsEnumType() const; 455 const VectorType *getAsVectorType() const; // GCC vector type. 456 const ComplexType *getAsComplexType() const; 457 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 458 const ExtVectorType *getAsExtVectorType() const; // Extended vector type. 459 const ObjCObjectPointerType *getAsObjCObjectPointerType() const; 460 // The following is a convenience method that returns an ObjCObjectPointerType 461 // for object declared using an interface. 462 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 463 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 464 const ObjCInterfaceType *getAsObjCInterfaceType() const; 465 const ObjCInterfaceType *getAsObjCQualifiedInterfaceType() const; 466 const TemplateTypeParmType *getAsTemplateTypeParmType() const; 467 468 // Member-template getAs<specific type>'. This scheme will eventually 469 // replace the specific getAsXXXX methods above. 470 template <typename T> const T *getAs() const; 471 472 const TemplateSpecializationType * 473 getAsTemplateSpecializationType() const; 474 475 /// getAsPointerToObjCInterfaceType - If this is a pointer to an ObjC 476 /// interface, return the interface type, otherwise return null. 477 const ObjCInterfaceType *getAsPointerToObjCInterfaceType() const; 478 479 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 480 /// element type of the array, potentially with type qualifiers missing. 481 /// This method should never be used when type qualifiers are meaningful. 482 const Type *getArrayElementTypeNoTypeQual() const; 483 484 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 485 /// pointer, this returns the respective pointee. 486 QualType getPointeeType() const; 487 488 /// getDesugaredType - Return the specified type with any "sugar" removed from 489 /// the type. This takes off typedefs, typeof's etc. If the outer level of 490 /// the type is already concrete, it returns it unmodified. This is similar 491 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 492 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 493 /// concrete. 494 QualType getDesugaredType(bool ForDisplay = false) const; 495 496 /// More type predicates useful for type checking/promotion 497 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 498 499 /// isSignedIntegerType - Return true if this is an integer type that is 500 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 501 /// an enum decl which has a signed representation, or a vector of signed 502 /// integer element type. 503 bool isSignedIntegerType() const; 504 505 /// isUnsignedIntegerType - Return true if this is an integer type that is 506 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 507 /// decl which has an unsigned representation, or a vector of unsigned integer 508 /// element type. 509 bool isUnsignedIntegerType() const; 510 511 /// isConstantSizeType - Return true if this is not a variable sized type, 512 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 513 /// incomplete types. 514 bool isConstantSizeType() const; 515 516 /// isSpecifierType - Returns true if this type can be represented by some 517 /// set of type specifiers. 518 bool isSpecifierType() const; 519 520 QualType getCanonicalTypeInternal() const { return CanonicalType; } 521 void dump() const; 522 virtual void getAsStringInternal(std::string &InnerString, 523 const PrintingPolicy &Policy) const = 0; 524 static bool classof(const Type *) { return true; } 525}; 526 527/// ExtQualType - TR18037 (C embedded extensions) 6.2.5p26 528/// This supports all kinds of type attributes; including, 529/// address space qualified types, objective-c's __weak and 530/// __strong attributes. 531/// 532class ExtQualType : public Type, public llvm::FoldingSetNode { 533 /// BaseType - This is the underlying type that this qualifies. All CVR 534 /// qualifiers are stored on the QualType that references this type, so we 535 /// can't have any here. 536 Type *BaseType; 537 538 /// Address Space ID - The address space ID this type is qualified with. 539 unsigned AddressSpace; 540 /// GC __weak/__strong attributes 541 QualType::GCAttrTypes GCAttrType; 542 543 ExtQualType(Type *Base, QualType CanonicalPtr, unsigned AddrSpace, 544 QualType::GCAttrTypes gcAttr) : 545 Type(ExtQual, CanonicalPtr, Base->isDependentType()), BaseType(Base), 546 AddressSpace(AddrSpace), GCAttrType(gcAttr) { 547 assert(!isa<ExtQualType>(BaseType) && 548 "Cannot have ExtQualType of ExtQualType"); 549 } 550 friend class ASTContext; // ASTContext creates these. 551public: 552 Type *getBaseType() const { return BaseType; } 553 QualType::GCAttrTypes getObjCGCAttr() const { return GCAttrType; } 554 unsigned getAddressSpace() const { return AddressSpace; } 555 556 virtual void getAsStringInternal(std::string &InnerString, 557 const PrintingPolicy &Policy) const; 558 559 void Profile(llvm::FoldingSetNodeID &ID) { 560 Profile(ID, getBaseType(), AddressSpace, GCAttrType); 561 } 562 static void Profile(llvm::FoldingSetNodeID &ID, Type *Base, 563 unsigned AddrSpace, QualType::GCAttrTypes gcAttr) { 564 ID.AddPointer(Base); 565 ID.AddInteger(AddrSpace); 566 ID.AddInteger(gcAttr); 567 } 568 569 static bool classof(const Type *T) { return T->getTypeClass() == ExtQual; } 570 static bool classof(const ExtQualType *) { return true; } 571}; 572 573 574/// QualifierSet - This class is used to collect qualifiers. 575/// Clang supports five independent qualifiers: 576/// * C99: const, volatile, and restrict 577/// * Embedded C (TR18037): address spaces 578/// * Objective C: the GC attributes (none, weak, or strong) 579class QualifierSet { 580public: 581 QualifierSet() : Mask(0) {} 582 583 void removeConst() { removeCVR(QualType::Const); } 584 void removeVolatile() { removeCVR(QualType::Volatile); } 585 void removeRestrict() { removeCVR(QualType::Restrict); } 586 void removeCVR(unsigned mask) { Mask &= ~mask; } 587 void removeAddressSpace() { setAddressSpace(0); } 588 void removeObjCGCAttrType() { setGCAttrType(QualType::GCNone); } 589 590 void addConst() { addCVR(QualType::Const); } 591 void addVolatile() { addCVR(QualType::Volatile); } 592 void addRestrict() { addCVR(QualType::Restrict); } 593 void addCVR(unsigned mask) { Mask |= mask; } 594 void addAddressSpace(unsigned space) { 595 assert(space); 596 setAddressSpace(space); 597 } 598 void addObjCGCAttrType(QualType::GCAttrTypes type) { 599 assert(type); 600 setGCAttrType(type); 601 } 602 603 bool hasConst() const { return Mask & QualType::Const; } 604 bool hasVolatile() const { return Mask & QualType::Volatile; } 605 bool hasRestrict() const { return Mask & QualType::Restrict; } 606 unsigned getCVRMask() const { return Mask & CVRMask; } 607 608 bool hasObjCGCAttrType() const { return Mask & GCAttrMask; } 609 QualType::GCAttrTypes getObjCGCAttrType() const { 610 return QualType::GCAttrTypes((Mask & GCAttrMask) >> GCAttrShift); 611 } 612 613 bool hasAddressSpace() const { return Mask & AddressSpaceMask; } 614 unsigned getAddressSpace() const { return Mask >> AddressSpaceShift; } 615 616 /// empty() - Return true if there are no qualifiers collected 617 /// in this set. 618 bool empty() { 619 return (Mask == 0); 620 } 621 622 /// Collect any qualifiers on the given type and return an 623 /// unqualified type. 624 const Type *strip(QualType QT) { 625 Mask |= QT.getCVRQualifiers(); 626 return strip(QT.getTypePtr()); 627 } 628 629 /// Collect any qualifiers on the given type and return an 630 /// unqualified type. 631 const Type *strip(const Type* T); 632 633 /// Apply the collected qualifiers to the given type. 634 QualType apply(QualType QT, ASTContext& C); 635 636 /// Apply the collected qualifiers to the given type. 637 QualType apply(const Type* T, ASTContext& C) { 638 return apply(QualType(T, 0), C); 639 } 640 641 bool operator==(QualifierSet& Other) { return Mask == Other.Mask; } 642 643private: 644 void setAddressSpace(unsigned space) { 645 assert(space <= MaxAddressSpace); 646 Mask = (Mask & ~AddressSpaceMask) 647 | (((uint32_t) space) << AddressSpaceShift); 648 } 649 650 void setGCAttrType(QualType::GCAttrTypes type) { 651 Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift); 652 } 653 654 // bits: |0 1 2|3 .. 4|5 .. 31| 655 // |C R V|GCAttr|AddrSpace| 656 uint32_t Mask; 657 658 static const uint32_t CVRMask = 0x07; 659 static const uint32_t GCAttrMask = 0x18; 660 static const uint32_t GCAttrShift = 3; 661 static const uint32_t AddressSpaceMask = ~(CVRMask | GCAttrMask); 662 static const uint32_t AddressSpaceShift = 5; 663 static const unsigned MaxAddressSpace = QualType::MaxAddressSpace; 664}; 665 666 667/// BuiltinType - This class is used for builtin types like 'int'. Builtin 668/// types are always canonical and have a literal name field. 669class BuiltinType : public Type { 670public: 671 enum Kind { 672 Void, 673 674 Bool, // This is bool and/or _Bool. 675 Char_U, // This is 'char' for targets where char is unsigned. 676 UChar, // This is explicitly qualified unsigned char. 677 Char16, // This is 'char16_t' for C++. 678 Char32, // This is 'char32_t' for C++. 679 UShort, 680 UInt, 681 ULong, 682 ULongLong, 683 UInt128, // __uint128_t 684 685 Char_S, // This is 'char' for targets where char is signed. 686 SChar, // This is explicitly qualified signed char. 687 WChar, // This is 'wchar_t' for C++. 688 Short, 689 Int, 690 Long, 691 LongLong, 692 Int128, // __int128_t 693 694 Float, Double, LongDouble, 695 696 NullPtr, // This is the type of C++0x 'nullptr'. 697 698 Overload, // This represents the type of an overloaded function declaration. 699 Dependent, // This represents the type of a type-dependent expression. 700 701 UndeducedAuto, // In C++0x, this represents the type of an auto variable 702 // that has not been deduced yet. 703 ObjCId, // This represents the ObjC 'id' type. 704 ObjCClass // This represents the ObjC 'Class' type. 705 }; 706private: 707 Kind TypeKind; 708public: 709 BuiltinType(Kind K) 710 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent)), 711 TypeKind(K) {} 712 713 Kind getKind() const { return TypeKind; } 714 const char *getName(const LangOptions &LO) const; 715 716 virtual void getAsStringInternal(std::string &InnerString, 717 const PrintingPolicy &Policy) const; 718 719 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 720 static bool classof(const BuiltinType *) { return true; } 721}; 722 723/// FixedWidthIntType - Used for arbitrary width types that we either don't 724/// want to or can't map to named integer types. These always have a lower 725/// integer rank than builtin types of the same width. 726class FixedWidthIntType : public Type { 727private: 728 unsigned Width; 729 bool Signed; 730public: 731 FixedWidthIntType(unsigned W, bool S) : Type(FixedWidthInt, QualType(), false), 732 Width(W), Signed(S) {} 733 734 unsigned getWidth() const { return Width; } 735 bool isSigned() const { return Signed; } 736 const char *getName() const; 737 738 virtual void getAsStringInternal(std::string &InnerString, 739 const PrintingPolicy &Policy) const; 740 741 static bool classof(const Type *T) { return T->getTypeClass() == FixedWidthInt; } 742 static bool classof(const FixedWidthIntType *) { return true; } 743}; 744 745/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 746/// types (_Complex float etc) as well as the GCC integer complex extensions. 747/// 748class ComplexType : public Type, public llvm::FoldingSetNode { 749 QualType ElementType; 750 ComplexType(QualType Element, QualType CanonicalPtr) : 751 Type(Complex, CanonicalPtr, Element->isDependentType()), 752 ElementType(Element) { 753 } 754 friend class ASTContext; // ASTContext creates these. 755public: 756 QualType getElementType() const { return ElementType; } 757 758 virtual void getAsStringInternal(std::string &InnerString, 759 const PrintingPolicy &Policy) const; 760 761 void Profile(llvm::FoldingSetNodeID &ID) { 762 Profile(ID, getElementType()); 763 } 764 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 765 ID.AddPointer(Element.getAsOpaquePtr()); 766 } 767 768 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 769 static bool classof(const ComplexType *) { return true; } 770}; 771 772/// PointerType - C99 6.7.5.1 - Pointer Declarators. 773/// 774class PointerType : public Type, public llvm::FoldingSetNode { 775 QualType PointeeType; 776 777 PointerType(QualType Pointee, QualType CanonicalPtr) : 778 Type(Pointer, CanonicalPtr, Pointee->isDependentType()), PointeeType(Pointee) { 779 } 780 friend class ASTContext; // ASTContext creates these. 781public: 782 783 virtual void getAsStringInternal(std::string &InnerString, 784 const PrintingPolicy &Policy) const; 785 786 QualType getPointeeType() const { return PointeeType; } 787 788 void Profile(llvm::FoldingSetNodeID &ID) { 789 Profile(ID, getPointeeType()); 790 } 791 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 792 ID.AddPointer(Pointee.getAsOpaquePtr()); 793 } 794 795 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 796 static bool classof(const PointerType *) { return true; } 797}; 798 799/// BlockPointerType - pointer to a block type. 800/// This type is to represent types syntactically represented as 801/// "void (^)(int)", etc. Pointee is required to always be a function type. 802/// 803class BlockPointerType : public Type, public llvm::FoldingSetNode { 804 QualType PointeeType; // Block is some kind of pointer type 805 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 806 Type(BlockPointer, CanonicalCls, Pointee->isDependentType()), 807 PointeeType(Pointee) { 808 } 809 friend class ASTContext; // ASTContext creates these. 810public: 811 812 // Get the pointee type. Pointee is required to always be a function type. 813 QualType getPointeeType() const { return PointeeType; } 814 815 virtual void getAsStringInternal(std::string &InnerString, 816 const PrintingPolicy &Policy) const; 817 818 void Profile(llvm::FoldingSetNodeID &ID) { 819 Profile(ID, getPointeeType()); 820 } 821 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 822 ID.AddPointer(Pointee.getAsOpaquePtr()); 823 } 824 825 static bool classof(const Type *T) { 826 return T->getTypeClass() == BlockPointer; 827 } 828 static bool classof(const BlockPointerType *) { return true; } 829}; 830 831/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 832/// 833class ReferenceType : public Type, public llvm::FoldingSetNode { 834 QualType PointeeType; 835 836protected: 837 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef) : 838 Type(tc, CanonicalRef, Referencee->isDependentType()), 839 PointeeType(Referencee) { 840 } 841public: 842 QualType getPointeeType() const { return PointeeType; } 843 844 void Profile(llvm::FoldingSetNodeID &ID) { 845 Profile(ID, getPointeeType()); 846 } 847 static void Profile(llvm::FoldingSetNodeID &ID, QualType Referencee) { 848 ID.AddPointer(Referencee.getAsOpaquePtr()); 849 } 850 851 static bool classof(const Type *T) { 852 return T->getTypeClass() == LValueReference || 853 T->getTypeClass() == RValueReference; 854 } 855 static bool classof(const ReferenceType *) { return true; } 856}; 857 858/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 859/// 860class LValueReferenceType : public ReferenceType { 861 LValueReferenceType(QualType Referencee, QualType CanonicalRef) : 862 ReferenceType(LValueReference, Referencee, CanonicalRef) { 863 } 864 friend class ASTContext; // ASTContext creates these 865public: 866 virtual void getAsStringInternal(std::string &InnerString, 867 const PrintingPolicy &Policy) const; 868 869 static bool classof(const Type *T) { 870 return T->getTypeClass() == LValueReference; 871 } 872 static bool classof(const LValueReferenceType *) { return true; } 873}; 874 875/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 876/// 877class RValueReferenceType : public ReferenceType { 878 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 879 ReferenceType(RValueReference, Referencee, CanonicalRef) { 880 } 881 friend class ASTContext; // ASTContext creates these 882public: 883 virtual void getAsStringInternal(std::string &InnerString, 884 const PrintingPolicy &Policy) const; 885 886 static bool classof(const Type *T) { 887 return T->getTypeClass() == RValueReference; 888 } 889 static bool classof(const RValueReferenceType *) { return true; } 890}; 891 892/// MemberPointerType - C++ 8.3.3 - Pointers to members 893/// 894class MemberPointerType : public Type, public llvm::FoldingSetNode { 895 QualType PointeeType; 896 /// The class of which the pointee is a member. Must ultimately be a 897 /// RecordType, but could be a typedef or a template parameter too. 898 const Type *Class; 899 900 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 901 Type(MemberPointer, CanonicalPtr, 902 Cls->isDependentType() || Pointee->isDependentType()), 903 PointeeType(Pointee), Class(Cls) { 904 } 905 friend class ASTContext; // ASTContext creates these. 906public: 907 908 QualType getPointeeType() const { return PointeeType; } 909 910 const Type *getClass() const { return Class; } 911 912 virtual void getAsStringInternal(std::string &InnerString, 913 const PrintingPolicy &Policy) const; 914 915 void Profile(llvm::FoldingSetNodeID &ID) { 916 Profile(ID, getPointeeType(), getClass()); 917 } 918 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 919 const Type *Class) { 920 ID.AddPointer(Pointee.getAsOpaquePtr()); 921 ID.AddPointer(Class); 922 } 923 924 static bool classof(const Type *T) { 925 return T->getTypeClass() == MemberPointer; 926 } 927 static bool classof(const MemberPointerType *) { return true; } 928}; 929 930/// ArrayType - C99 6.7.5.2 - Array Declarators. 931/// 932class ArrayType : public Type, public llvm::FoldingSetNode { 933public: 934 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 935 /// an array with a static size (e.g. int X[static 4]), or an array 936 /// with a star size (e.g. int X[*]). 937 /// 'static' is only allowed on function parameters. 938 enum ArraySizeModifier { 939 Normal, Static, Star 940 }; 941private: 942 /// ElementType - The element type of the array. 943 QualType ElementType; 944 945 // NOTE: VC++ treats enums as signed, avoid using the ArraySizeModifier enum 946 /// NOTE: These fields are packed into the bitfields space in the Type class. 947 unsigned SizeModifier : 2; 948 949 /// IndexTypeQuals - Capture qualifiers in declarations like: 950 /// 'int X[static restrict 4]'. For function parameters only. 951 unsigned IndexTypeQuals : 3; 952 953protected: 954 // C++ [temp.dep.type]p1: 955 // A type is dependent if it is... 956 // - an array type constructed from any dependent type or whose 957 // size is specified by a constant expression that is 958 // value-dependent, 959 ArrayType(TypeClass tc, QualType et, QualType can, 960 ArraySizeModifier sm, unsigned tq) 961 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray), 962 ElementType(et), SizeModifier(sm), IndexTypeQuals(tq) {} 963 964 friend class ASTContext; // ASTContext creates these. 965public: 966 QualType getElementType() const { return ElementType; } 967 ArraySizeModifier getSizeModifier() const { 968 return ArraySizeModifier(SizeModifier); 969 } 970 unsigned getIndexTypeQualifier() const { return IndexTypeQuals; } 971 972 static bool classof(const Type *T) { 973 return T->getTypeClass() == ConstantArray || 974 T->getTypeClass() == ConstantArrayWithExpr || 975 T->getTypeClass() == ConstantArrayWithoutExpr || 976 T->getTypeClass() == VariableArray || 977 T->getTypeClass() == IncompleteArray || 978 T->getTypeClass() == DependentSizedArray; 979 } 980 static bool classof(const ArrayType *) { return true; } 981}; 982 983/// ConstantArrayType - This class represents the canonical version of 984/// C arrays with a specified constant size. For example, the canonical 985/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 986/// type is 'int' and the size is 404. 987class ConstantArrayType : public ArrayType { 988 llvm::APInt Size; // Allows us to unique the type. 989 990 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 991 ArraySizeModifier sm, unsigned tq) 992 : ArrayType(ConstantArray, et, can, sm, tq), 993 Size(size) {} 994protected: 995 ConstantArrayType(TypeClass tc, QualType et, QualType can, 996 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 997 : ArrayType(tc, et, can, sm, tq), Size(size) {} 998 friend class ASTContext; // ASTContext creates these. 999public: 1000 const llvm::APInt &getSize() const { return Size; } 1001 virtual void getAsStringInternal(std::string &InnerString, 1002 const PrintingPolicy &Policy) const; 1003 1004 void Profile(llvm::FoldingSetNodeID &ID) { 1005 Profile(ID, getElementType(), getSize(), 1006 getSizeModifier(), getIndexTypeQualifier()); 1007 } 1008 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1009 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 1010 unsigned TypeQuals) { 1011 ID.AddPointer(ET.getAsOpaquePtr()); 1012 ID.AddInteger(ArraySize.getZExtValue()); 1013 ID.AddInteger(SizeMod); 1014 ID.AddInteger(TypeQuals); 1015 } 1016 static bool classof(const Type *T) { 1017 return T->getTypeClass() == ConstantArray || 1018 T->getTypeClass() == ConstantArrayWithExpr || 1019 T->getTypeClass() == ConstantArrayWithoutExpr; 1020 } 1021 static bool classof(const ConstantArrayType *) { return true; } 1022}; 1023 1024/// ConstantArrayWithExprType - This class represents C arrays with a 1025/// constant size specified by means of an integer constant expression. 1026/// For example 'int A[sizeof(int)]' has ConstantArrayWithExprType where 1027/// the element type is 'int' and the size expression is 'sizeof(int)'. 1028/// These types are non-canonical. 1029class ConstantArrayWithExprType : public ConstantArrayType { 1030 /// SizeExpr - The ICE occurring in the concrete syntax. 1031 Expr *SizeExpr; 1032 /// Brackets - The left and right array brackets. 1033 SourceRange Brackets; 1034 1035 ConstantArrayWithExprType(QualType et, QualType can, 1036 const llvm::APInt &size, Expr *e, 1037 ArraySizeModifier sm, unsigned tq, 1038 SourceRange brackets) 1039 : ConstantArrayType(ConstantArrayWithExpr, et, can, size, sm, tq), 1040 SizeExpr(e), Brackets(brackets) {} 1041 friend class ASTContext; // ASTContext creates these. 1042 virtual void Destroy(ASTContext& C); 1043 1044public: 1045 Expr *getSizeExpr() const { return SizeExpr; } 1046 SourceRange getBracketsRange() const { return Brackets; } 1047 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1048 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1049 1050 virtual void getAsStringInternal(std::string &InnerString, 1051 const PrintingPolicy &Policy) const; 1052 1053 static bool classof(const Type *T) { 1054 return T->getTypeClass() == ConstantArrayWithExpr; 1055 } 1056 static bool classof(const ConstantArrayWithExprType *) { return true; } 1057 1058 void Profile(llvm::FoldingSetNodeID &ID) { 1059 assert(0 && "Cannot unique ConstantArrayWithExprTypes."); 1060 } 1061}; 1062 1063/// ConstantArrayWithoutExprType - This class represents C arrays with a 1064/// constant size that was not specified by an integer constant expression, 1065/// but inferred by static semantics. 1066/// For example 'int A[] = { 0, 1, 2 }' has ConstantArrayWithoutExprType. 1067/// These types are non-canonical: the corresponding canonical type, 1068/// having the size specified in an APInt object, is a ConstantArrayType. 1069class ConstantArrayWithoutExprType : public ConstantArrayType { 1070 1071 ConstantArrayWithoutExprType(QualType et, QualType can, 1072 const llvm::APInt &size, 1073 ArraySizeModifier sm, unsigned tq) 1074 : ConstantArrayType(ConstantArrayWithoutExpr, et, can, size, sm, tq) {} 1075 friend class ASTContext; // ASTContext creates these. 1076 1077public: 1078 virtual void getAsStringInternal(std::string &InnerString, 1079 const PrintingPolicy &Policy) const; 1080 1081 static bool classof(const Type *T) { 1082 return T->getTypeClass() == ConstantArrayWithoutExpr; 1083 } 1084 static bool classof(const ConstantArrayWithoutExprType *) { return true; } 1085 1086 void Profile(llvm::FoldingSetNodeID &ID) { 1087 assert(0 && "Cannot unique ConstantArrayWithoutExprTypes."); 1088 } 1089}; 1090 1091/// IncompleteArrayType - This class represents C arrays with an unspecified 1092/// size. For example 'int A[]' has an IncompleteArrayType where the element 1093/// type is 'int' and the size is unspecified. 1094class IncompleteArrayType : public ArrayType { 1095 1096 IncompleteArrayType(QualType et, QualType can, 1097 ArraySizeModifier sm, unsigned tq) 1098 : ArrayType(IncompleteArray, et, can, sm, tq) {} 1099 friend class ASTContext; // ASTContext creates these. 1100public: 1101 virtual void getAsStringInternal(std::string &InnerString, 1102 const PrintingPolicy &Policy) const; 1103 1104 static bool classof(const Type *T) { 1105 return T->getTypeClass() == IncompleteArray; 1106 } 1107 static bool classof(const IncompleteArrayType *) { return true; } 1108 1109 friend class StmtIteratorBase; 1110 1111 void Profile(llvm::FoldingSetNodeID &ID) { 1112 Profile(ID, getElementType(), getSizeModifier(), getIndexTypeQualifier()); 1113 } 1114 1115 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1116 ArraySizeModifier SizeMod, unsigned TypeQuals) { 1117 ID.AddPointer(ET.getAsOpaquePtr()); 1118 ID.AddInteger(SizeMod); 1119 ID.AddInteger(TypeQuals); 1120 } 1121}; 1122 1123/// VariableArrayType - This class represents C arrays with a specified size 1124/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 1125/// Since the size expression is an arbitrary expression, we store it as such. 1126/// 1127/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 1128/// should not be: two lexically equivalent variable array types could mean 1129/// different things, for example, these variables do not have the same type 1130/// dynamically: 1131/// 1132/// void foo(int x) { 1133/// int Y[x]; 1134/// ++x; 1135/// int Z[x]; 1136/// } 1137/// 1138class VariableArrayType : public ArrayType { 1139 /// SizeExpr - An assignment expression. VLA's are only permitted within 1140 /// a function block. 1141 Stmt *SizeExpr; 1142 /// Brackets - The left and right array brackets. 1143 SourceRange Brackets; 1144 1145 VariableArrayType(QualType et, QualType can, Expr *e, 1146 ArraySizeModifier sm, unsigned tq, 1147 SourceRange brackets) 1148 : ArrayType(VariableArray, et, can, sm, tq), 1149 SizeExpr((Stmt*) e), Brackets(brackets) {} 1150 friend class ASTContext; // ASTContext creates these. 1151 virtual void Destroy(ASTContext& C); 1152 1153public: 1154 Expr *getSizeExpr() const { 1155 // We use C-style casts instead of cast<> here because we do not wish 1156 // to have a dependency of Type.h on Stmt.h/Expr.h. 1157 return (Expr*) SizeExpr; 1158 } 1159 SourceRange getBracketsRange() const { return Brackets; } 1160 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1161 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1162 1163 virtual void getAsStringInternal(std::string &InnerString, 1164 const PrintingPolicy &Policy) const; 1165 1166 static bool classof(const Type *T) { 1167 return T->getTypeClass() == VariableArray; 1168 } 1169 static bool classof(const VariableArrayType *) { return true; } 1170 1171 friend class StmtIteratorBase; 1172 1173 void Profile(llvm::FoldingSetNodeID &ID) { 1174 assert(0 && "Cannnot unique VariableArrayTypes."); 1175 } 1176}; 1177 1178/// DependentSizedArrayType - This type represents an array type in 1179/// C++ whose size is a value-dependent expression. For example: 1180/// @code 1181/// template<typename T, int Size> 1182/// class array { 1183/// T data[Size]; 1184/// }; 1185/// @endcode 1186/// For these types, we won't actually know what the array bound is 1187/// until template instantiation occurs, at which point this will 1188/// become either a ConstantArrayType or a VariableArrayType. 1189class DependentSizedArrayType : public ArrayType { 1190 /// SizeExpr - An assignment expression that will instantiate to the 1191 /// size of the array. 1192 Stmt *SizeExpr; 1193 /// Brackets - The left and right array brackets. 1194 SourceRange Brackets; 1195 1196 DependentSizedArrayType(QualType et, QualType can, Expr *e, 1197 ArraySizeModifier sm, unsigned tq, 1198 SourceRange brackets) 1199 : ArrayType(DependentSizedArray, et, can, sm, tq), 1200 SizeExpr((Stmt*) e), Brackets(brackets) {} 1201 friend class ASTContext; // ASTContext creates these. 1202 virtual void Destroy(ASTContext& C); 1203 1204public: 1205 Expr *getSizeExpr() const { 1206 // We use C-style casts instead of cast<> here because we do not wish 1207 // to have a dependency of Type.h on Stmt.h/Expr.h. 1208 return (Expr*) SizeExpr; 1209 } 1210 SourceRange getBracketsRange() const { return Brackets; } 1211 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1212 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1213 1214 virtual void getAsStringInternal(std::string &InnerString, 1215 const PrintingPolicy &Policy) const; 1216 1217 static bool classof(const Type *T) { 1218 return T->getTypeClass() == DependentSizedArray; 1219 } 1220 static bool classof(const DependentSizedArrayType *) { return true; } 1221 1222 friend class StmtIteratorBase; 1223 1224 void Profile(llvm::FoldingSetNodeID &ID) { 1225 assert(0 && "Cannnot unique DependentSizedArrayTypes."); 1226 } 1227}; 1228 1229/// DependentSizedExtVectorType - This type represent an extended vector type 1230/// where either the type or size is dependent. For example: 1231/// @code 1232/// template<typename T, int Size> 1233/// class vector { 1234/// typedef T __attribute__((ext_vector_type(Size))) type; 1235/// } 1236/// @endcode 1237class DependentSizedExtVectorType : public Type { 1238 Expr *SizeExpr; 1239 /// ElementType - The element type of the array. 1240 QualType ElementType; 1241 SourceLocation loc; 1242 1243 DependentSizedExtVectorType(QualType ElementType, QualType can, 1244 Expr *SizeExpr, SourceLocation loc) 1245 : Type (DependentSizedExtVector, can, true), 1246 SizeExpr(SizeExpr), ElementType(ElementType), loc(loc) {} 1247 friend class ASTContext; 1248 virtual void Destroy(ASTContext& C); 1249 1250public: 1251 const Expr *getSizeExpr() const { return SizeExpr; } 1252 QualType getElementType() const { return ElementType; } 1253 SourceLocation getAttributeLoc() const { return loc; } 1254 1255 virtual void getAsStringInternal(std::string &InnerString, 1256 const PrintingPolicy &Policy) const; 1257 1258 static bool classof(const Type *T) { 1259 return T->getTypeClass() == DependentSizedExtVector; 1260 } 1261 static bool classof(const DependentSizedExtVectorType *) { return true; } 1262}; 1263 1264 1265/// VectorType - GCC generic vector type. This type is created using 1266/// __attribute__((vector_size(n)), where "n" specifies the vector size in 1267/// bytes. Since the constructor takes the number of vector elements, the 1268/// client is responsible for converting the size into the number of elements. 1269class VectorType : public Type, public llvm::FoldingSetNode { 1270protected: 1271 /// ElementType - The element type of the vector. 1272 QualType ElementType; 1273 1274 /// NumElements - The number of elements in the vector. 1275 unsigned NumElements; 1276 1277 VectorType(QualType vecType, unsigned nElements, QualType canonType) : 1278 Type(Vector, canonType, vecType->isDependentType()), 1279 ElementType(vecType), NumElements(nElements) {} 1280 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 1281 QualType canonType) 1282 : Type(tc, canonType, vecType->isDependentType()), ElementType(vecType), 1283 NumElements(nElements) {} 1284 friend class ASTContext; // ASTContext creates these. 1285public: 1286 1287 QualType getElementType() const { return ElementType; } 1288 unsigned getNumElements() const { return NumElements; } 1289 1290 virtual void getAsStringInternal(std::string &InnerString, 1291 const PrintingPolicy &Policy) const; 1292 1293 void Profile(llvm::FoldingSetNodeID &ID) { 1294 Profile(ID, getElementType(), getNumElements(), getTypeClass()); 1295 } 1296 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 1297 unsigned NumElements, TypeClass TypeClass) { 1298 ID.AddPointer(ElementType.getAsOpaquePtr()); 1299 ID.AddInteger(NumElements); 1300 ID.AddInteger(TypeClass); 1301 } 1302 static bool classof(const Type *T) { 1303 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 1304 } 1305 static bool classof(const VectorType *) { return true; } 1306}; 1307 1308/// ExtVectorType - Extended vector type. This type is created using 1309/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 1310/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 1311/// class enables syntactic extensions, like Vector Components for accessing 1312/// points, colors, and textures (modeled after OpenGL Shading Language). 1313class ExtVectorType : public VectorType { 1314 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 1315 VectorType(ExtVector, vecType, nElements, canonType) {} 1316 friend class ASTContext; // ASTContext creates these. 1317public: 1318 static int getPointAccessorIdx(char c) { 1319 switch (c) { 1320 default: return -1; 1321 case 'x': return 0; 1322 case 'y': return 1; 1323 case 'z': return 2; 1324 case 'w': return 3; 1325 } 1326 } 1327 static int getNumericAccessorIdx(char c) { 1328 switch (c) { 1329 default: return -1; 1330 case '0': return 0; 1331 case '1': return 1; 1332 case '2': return 2; 1333 case '3': return 3; 1334 case '4': return 4; 1335 case '5': return 5; 1336 case '6': return 6; 1337 case '7': return 7; 1338 case '8': return 8; 1339 case '9': return 9; 1340 case 'A': 1341 case 'a': return 10; 1342 case 'B': 1343 case 'b': return 11; 1344 case 'C': 1345 case 'c': return 12; 1346 case 'D': 1347 case 'd': return 13; 1348 case 'E': 1349 case 'e': return 14; 1350 case 'F': 1351 case 'f': return 15; 1352 } 1353 } 1354 1355 static int getAccessorIdx(char c) { 1356 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 1357 return getNumericAccessorIdx(c); 1358 } 1359 1360 bool isAccessorWithinNumElements(char c) const { 1361 if (int idx = getAccessorIdx(c)+1) 1362 return unsigned(idx-1) < NumElements; 1363 return false; 1364 } 1365 virtual void getAsStringInternal(std::string &InnerString, 1366 const PrintingPolicy &Policy) const; 1367 1368 static bool classof(const Type *T) { 1369 return T->getTypeClass() == ExtVector; 1370 } 1371 static bool classof(const ExtVectorType *) { return true; } 1372}; 1373 1374/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 1375/// class of FunctionNoProtoType and FunctionProtoType. 1376/// 1377class FunctionType : public Type { 1378 /// SubClassData - This field is owned by the subclass, put here to pack 1379 /// tightly with the ivars in Type. 1380 bool SubClassData : 1; 1381 1382 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1383 /// other bitfields. 1384 /// The qualifiers are part of FunctionProtoType because... 1385 /// 1386 /// C++ 8.3.5p4: The return type, the parameter type list and the 1387 /// cv-qualifier-seq, [...], are part of the function type. 1388 /// 1389 unsigned TypeQuals : 3; 1390 1391 /// NoReturn - Indicates if the function type is attribute noreturn. 1392 unsigned NoReturn : 1; 1393 1394 // The type returned by the function. 1395 QualType ResultType; 1396protected: 1397 FunctionType(TypeClass tc, QualType res, bool SubclassInfo, 1398 unsigned typeQuals, QualType Canonical, bool Dependent, 1399 bool noReturn = false) 1400 : Type(tc, Canonical, Dependent), 1401 SubClassData(SubclassInfo), TypeQuals(typeQuals), NoReturn(noReturn), 1402 ResultType(res) {} 1403 bool getSubClassData() const { return SubClassData; } 1404 unsigned getTypeQuals() const { return TypeQuals; } 1405public: 1406 1407 QualType getResultType() const { return ResultType; } 1408 bool getNoReturnAttr() const { return NoReturn; } 1409 1410 1411 static bool classof(const Type *T) { 1412 return T->getTypeClass() == FunctionNoProto || 1413 T->getTypeClass() == FunctionProto; 1414 } 1415 static bool classof(const FunctionType *) { return true; } 1416}; 1417 1418/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 1419/// no information available about its arguments. 1420class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 1421 FunctionNoProtoType(QualType Result, QualType Canonical, 1422 bool NoReturn = false) 1423 : FunctionType(FunctionNoProto, Result, false, 0, Canonical, 1424 /*Dependent=*/false, NoReturn) {} 1425 friend class ASTContext; // ASTContext creates these. 1426public: 1427 // No additional state past what FunctionType provides. 1428 1429 virtual void getAsStringInternal(std::string &InnerString, 1430 const PrintingPolicy &Policy) const; 1431 1432 void Profile(llvm::FoldingSetNodeID &ID) { 1433 Profile(ID, getResultType(), getNoReturnAttr()); 1434 } 1435 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 1436 bool NoReturn) { 1437 ID.AddInteger(NoReturn); 1438 ID.AddPointer(ResultType.getAsOpaquePtr()); 1439 } 1440 1441 static bool classof(const Type *T) { 1442 return T->getTypeClass() == FunctionNoProto; 1443 } 1444 static bool classof(const FunctionNoProtoType *) { return true; } 1445}; 1446 1447/// FunctionProtoType - Represents a prototype with argument type info, e.g. 1448/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 1449/// arguments, not as having a single void argument. Such a type can have an 1450/// exception specification, but this specification is not part of the canonical 1451/// type. 1452class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 1453 /// hasAnyDependentType - Determine whether there are any dependent 1454 /// types within the arguments passed in. 1455 static bool hasAnyDependentType(const QualType *ArgArray, unsigned numArgs) { 1456 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 1457 if (ArgArray[Idx]->isDependentType()) 1458 return true; 1459 1460 return false; 1461 } 1462 1463 FunctionProtoType(QualType Result, const QualType *ArgArray, unsigned numArgs, 1464 bool isVariadic, unsigned typeQuals, bool hasExs, 1465 bool hasAnyExs, const QualType *ExArray, 1466 unsigned numExs, QualType Canonical, bool NoReturn) 1467 : FunctionType(FunctionProto, Result, isVariadic, typeQuals, Canonical, 1468 (Result->isDependentType() || 1469 hasAnyDependentType(ArgArray, numArgs)), NoReturn), 1470 NumArgs(numArgs), NumExceptions(numExs), HasExceptionSpec(hasExs), 1471 AnyExceptionSpec(hasAnyExs) { 1472 // Fill in the trailing argument array. 1473 QualType *ArgInfo = reinterpret_cast<QualType*>(this+1); 1474 for (unsigned i = 0; i != numArgs; ++i) 1475 ArgInfo[i] = ArgArray[i]; 1476 // Fill in the exception array. 1477 QualType *Ex = ArgInfo + numArgs; 1478 for (unsigned i = 0; i != numExs; ++i) 1479 Ex[i] = ExArray[i]; 1480 } 1481 1482 /// NumArgs - The number of arguments this function has, not counting '...'. 1483 unsigned NumArgs : 20; 1484 1485 /// NumExceptions - The number of types in the exception spec, if any. 1486 unsigned NumExceptions : 10; 1487 1488 /// HasExceptionSpec - Whether this function has an exception spec at all. 1489 bool HasExceptionSpec : 1; 1490 1491 /// AnyExceptionSpec - Whether this function has a throw(...) spec. 1492 bool AnyExceptionSpec : 1; 1493 1494 /// ArgInfo - There is an variable size array after the class in memory that 1495 /// holds the argument types. 1496 1497 /// Exceptions - There is another variable size array after ArgInfo that 1498 /// holds the exception types. 1499 1500 friend class ASTContext; // ASTContext creates these. 1501 1502public: 1503 unsigned getNumArgs() const { return NumArgs; } 1504 QualType getArgType(unsigned i) const { 1505 assert(i < NumArgs && "Invalid argument number!"); 1506 return arg_type_begin()[i]; 1507 } 1508 1509 bool hasExceptionSpec() const { return HasExceptionSpec; } 1510 bool hasAnyExceptionSpec() const { return AnyExceptionSpec; } 1511 unsigned getNumExceptions() const { return NumExceptions; } 1512 QualType getExceptionType(unsigned i) const { 1513 assert(i < NumExceptions && "Invalid exception number!"); 1514 return exception_begin()[i]; 1515 } 1516 bool hasEmptyExceptionSpec() const { 1517 return hasExceptionSpec() && !hasAnyExceptionSpec() && 1518 getNumExceptions() == 0; 1519 } 1520 1521 bool isVariadic() const { return getSubClassData(); } 1522 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 1523 1524 typedef const QualType *arg_type_iterator; 1525 arg_type_iterator arg_type_begin() const { 1526 return reinterpret_cast<const QualType *>(this+1); 1527 } 1528 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 1529 1530 typedef const QualType *exception_iterator; 1531 exception_iterator exception_begin() const { 1532 // exceptions begin where arguments end 1533 return arg_type_end(); 1534 } 1535 exception_iterator exception_end() const { 1536 return exception_begin() + NumExceptions; 1537 } 1538 1539 virtual void getAsStringInternal(std::string &InnerString, 1540 const PrintingPolicy &Policy) const; 1541 1542 static bool classof(const Type *T) { 1543 return T->getTypeClass() == FunctionProto; 1544 } 1545 static bool classof(const FunctionProtoType *) { return true; } 1546 1547 void Profile(llvm::FoldingSetNodeID &ID); 1548 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 1549 arg_type_iterator ArgTys, unsigned NumArgs, 1550 bool isVariadic, unsigned TypeQuals, 1551 bool hasExceptionSpec, bool anyExceptionSpec, 1552 unsigned NumExceptions, exception_iterator Exs, 1553 bool NoReturn); 1554}; 1555 1556 1557class TypedefType : public Type { 1558 TypedefDecl *Decl; 1559protected: 1560 TypedefType(TypeClass tc, TypedefDecl *D, QualType can) 1561 : Type(tc, can, can->isDependentType()), Decl(D) { 1562 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1563 } 1564 friend class ASTContext; // ASTContext creates these. 1565public: 1566 1567 TypedefDecl *getDecl() const { return Decl; } 1568 1569 /// LookThroughTypedefs - Return the ultimate type this typedef corresponds to 1570 /// potentially looking through *all* consecutive typedefs. This returns the 1571 /// sum of the type qualifiers, so if you have: 1572 /// typedef const int A; 1573 /// typedef volatile A B; 1574 /// looking through the typedefs for B will give you "const volatile A". 1575 QualType LookThroughTypedefs() const; 1576 1577 virtual void getAsStringInternal(std::string &InnerString, 1578 const PrintingPolicy &Policy) const; 1579 1580 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 1581 static bool classof(const TypedefType *) { return true; } 1582}; 1583 1584/// TypeOfExprType (GCC extension). 1585class TypeOfExprType : public Type { 1586 Expr *TOExpr; 1587 TypeOfExprType(Expr *E, QualType can = QualType()); 1588 friend class ASTContext; // ASTContext creates these. 1589public: 1590 Expr *getUnderlyingExpr() const { return TOExpr; } 1591 1592 virtual void getAsStringInternal(std::string &InnerString, 1593 const PrintingPolicy &Policy) const; 1594 1595 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 1596 static bool classof(const TypeOfExprType *) { return true; } 1597}; 1598 1599/// TypeOfType (GCC extension). 1600class TypeOfType : public Type { 1601 QualType TOType; 1602 TypeOfType(QualType T, QualType can) 1603 : Type(TypeOf, can, T->isDependentType()), TOType(T) { 1604 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1605 } 1606 friend class ASTContext; // ASTContext creates these. 1607public: 1608 QualType getUnderlyingType() const { return TOType; } 1609 1610 virtual void getAsStringInternal(std::string &InnerString, 1611 const PrintingPolicy &Policy) const; 1612 1613 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 1614 static bool classof(const TypeOfType *) { return true; } 1615}; 1616 1617/// DecltypeType (C++0x) 1618class DecltypeType : public Type { 1619 Expr *E; 1620 1621 // FIXME: We could get rid of UnderlyingType if we wanted to: We would have to 1622 // Move getDesugaredType to ASTContext so that it can call getDecltypeForExpr 1623 // from it. 1624 QualType UnderlyingType; 1625 1626 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 1627 friend class ASTContext; // ASTContext creates these. 1628public: 1629 Expr *getUnderlyingExpr() const { return E; } 1630 QualType getUnderlyingType() const { return UnderlyingType; } 1631 1632 virtual void getAsStringInternal(std::string &InnerString, 1633 const PrintingPolicy &Policy) const; 1634 1635 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 1636 static bool classof(const DecltypeType *) { return true; } 1637}; 1638 1639class TagType : public Type { 1640 /// Stores the TagDecl associated with this type. The decl will 1641 /// point to the TagDecl that actually defines the entity (or is a 1642 /// definition in progress), if there is such a definition. The 1643 /// single-bit value will be non-zero when this tag is in the 1644 /// process of being defined. 1645 mutable llvm::PointerIntPair<TagDecl *, 1> decl; 1646 friend class ASTContext; 1647 friend class TagDecl; 1648 1649protected: 1650 TagType(TypeClass TC, TagDecl *D, QualType can); 1651 1652public: 1653 TagDecl *getDecl() const { return decl.getPointer(); } 1654 1655 /// @brief Determines whether this type is in the process of being 1656 /// defined. 1657 bool isBeingDefined() const { return decl.getInt(); } 1658 void setBeingDefined(bool Def) { decl.setInt(Def? 1 : 0); } 1659 1660 virtual void getAsStringInternal(std::string &InnerString, 1661 const PrintingPolicy &Policy) const; 1662 1663 static bool classof(const Type *T) { 1664 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 1665 } 1666 static bool classof(const TagType *) { return true; } 1667 static bool classof(const RecordType *) { return true; } 1668 static bool classof(const EnumType *) { return true; } 1669}; 1670 1671/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 1672/// to detect TagType objects of structs/unions/classes. 1673class RecordType : public TagType { 1674protected: 1675 explicit RecordType(RecordDecl *D) 1676 : TagType(Record, reinterpret_cast<TagDecl*>(D), QualType()) { } 1677 explicit RecordType(TypeClass TC, RecordDecl *D) 1678 : TagType(TC, reinterpret_cast<TagDecl*>(D), QualType()) { } 1679 friend class ASTContext; // ASTContext creates these. 1680public: 1681 1682 RecordDecl *getDecl() const { 1683 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 1684 } 1685 1686 // FIXME: This predicate is a helper to QualType/Type. It needs to 1687 // recursively check all fields for const-ness. If any field is declared 1688 // const, it needs to return false. 1689 bool hasConstFields() const { return false; } 1690 1691 // FIXME: RecordType needs to check when it is created that all fields are in 1692 // the same address space, and return that. 1693 unsigned getAddressSpace() const { return 0; } 1694 1695 static bool classof(const TagType *T); 1696 static bool classof(const Type *T) { 1697 return isa<TagType>(T) && classof(cast<TagType>(T)); 1698 } 1699 static bool classof(const RecordType *) { return true; } 1700}; 1701 1702/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 1703/// to detect TagType objects of enums. 1704class EnumType : public TagType { 1705 explicit EnumType(EnumDecl *D) 1706 : TagType(Enum, reinterpret_cast<TagDecl*>(D), QualType()) { } 1707 friend class ASTContext; // ASTContext creates these. 1708public: 1709 1710 EnumDecl *getDecl() const { 1711 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 1712 } 1713 1714 static bool classof(const TagType *T); 1715 static bool classof(const Type *T) { 1716 return isa<TagType>(T) && classof(cast<TagType>(T)); 1717 } 1718 static bool classof(const EnumType *) { return true; } 1719}; 1720 1721class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 1722 unsigned Depth : 15; 1723 unsigned Index : 16; 1724 unsigned ParameterPack : 1; 1725 IdentifierInfo *Name; 1726 1727 TemplateTypeParmType(unsigned D, unsigned I, bool PP, IdentifierInfo *N, 1728 QualType Canon) 1729 : Type(TemplateTypeParm, Canon, /*Dependent=*/true), 1730 Depth(D), Index(I), ParameterPack(PP), Name(N) { } 1731 1732 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 1733 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true), 1734 Depth(D), Index(I), ParameterPack(PP), Name(0) { } 1735 1736 friend class ASTContext; // ASTContext creates these 1737 1738public: 1739 unsigned getDepth() const { return Depth; } 1740 unsigned getIndex() const { return Index; } 1741 bool isParameterPack() const { return ParameterPack; } 1742 IdentifierInfo *getName() const { return Name; } 1743 1744 virtual void getAsStringInternal(std::string &InnerString, 1745 const PrintingPolicy &Policy) const; 1746 1747 void Profile(llvm::FoldingSetNodeID &ID) { 1748 Profile(ID, Depth, Index, ParameterPack, Name); 1749 } 1750 1751 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 1752 unsigned Index, bool ParameterPack, 1753 IdentifierInfo *Name) { 1754 ID.AddInteger(Depth); 1755 ID.AddInteger(Index); 1756 ID.AddBoolean(ParameterPack); 1757 ID.AddPointer(Name); 1758 } 1759 1760 static bool classof(const Type *T) { 1761 return T->getTypeClass() == TemplateTypeParm; 1762 } 1763 static bool classof(const TemplateTypeParmType *T) { return true; } 1764}; 1765 1766/// \brief Represents the type of a template specialization as written 1767/// in the source code. 1768/// 1769/// Template specialization types represent the syntactic form of a 1770/// template-id that refers to a type, e.g., @c vector<int>. Some 1771/// template specialization types are syntactic sugar, whose canonical 1772/// type will point to some other type node that represents the 1773/// instantiation or class template specialization. For example, a 1774/// class template specialization type of @c vector<int> will refer to 1775/// a tag type for the instantiation 1776/// @c std::vector<int, std::allocator<int>>. 1777/// 1778/// Other template specialization types, for which the template name 1779/// is dependent, may be canonical types. These types are always 1780/// dependent. 1781class TemplateSpecializationType 1782 : public Type, public llvm::FoldingSetNode { 1783 1784 /// \brief The name of the template being specialized. 1785 TemplateName Template; 1786 1787 /// \brief - The number of template arguments named in this class 1788 /// template specialization. 1789 unsigned NumArgs; 1790 1791 TemplateSpecializationType(TemplateName T, 1792 const TemplateArgument *Args, 1793 unsigned NumArgs, QualType Canon); 1794 1795 virtual void Destroy(ASTContext& C); 1796 1797 friend class ASTContext; // ASTContext creates these 1798 1799public: 1800 /// \brief Determine whether any of the given template arguments are 1801 /// dependent. 1802 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 1803 unsigned NumArgs); 1804 1805 /// \brief Print a template argument list, including the '<' and '>' 1806 /// enclosing the template arguments. 1807 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 1808 unsigned NumArgs, 1809 const PrintingPolicy &Policy); 1810 1811 typedef const TemplateArgument * iterator; 1812 1813 iterator begin() const { return getArgs(); } 1814 iterator end() const; 1815 1816 /// \brief Retrieve the name of the template that we are specializing. 1817 TemplateName getTemplateName() const { return Template; } 1818 1819 /// \brief Retrieve the template arguments. 1820 const TemplateArgument *getArgs() const { 1821 return reinterpret_cast<const TemplateArgument *>(this + 1); 1822 } 1823 1824 /// \brief Retrieve the number of template arguments. 1825 unsigned getNumArgs() const { return NumArgs; } 1826 1827 /// \brief Retrieve a specific template argument as a type. 1828 /// \precondition @c isArgType(Arg) 1829 const TemplateArgument &getArg(unsigned Idx) const; 1830 1831 virtual void getAsStringInternal(std::string &InnerString, 1832 const PrintingPolicy &Policy) const; 1833 1834 void Profile(llvm::FoldingSetNodeID &ID) { 1835 Profile(ID, Template, getArgs(), NumArgs); 1836 } 1837 1838 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 1839 const TemplateArgument *Args, unsigned NumArgs); 1840 1841 static bool classof(const Type *T) { 1842 return T->getTypeClass() == TemplateSpecialization; 1843 } 1844 static bool classof(const TemplateSpecializationType *T) { return true; } 1845}; 1846 1847/// \brief Represents a type that was referred to via a qualified 1848/// name, e.g., N::M::type. 1849/// 1850/// This type is used to keep track of a type name as written in the 1851/// source code, including any nested-name-specifiers. The type itself 1852/// is always "sugar", used to express what was written in the source 1853/// code but containing no additional semantic information. 1854class QualifiedNameType : public Type, public llvm::FoldingSetNode { 1855 /// \brief The nested name specifier containing the qualifier. 1856 NestedNameSpecifier *NNS; 1857 1858 /// \brief The type that this qualified name refers to. 1859 QualType NamedType; 1860 1861 QualifiedNameType(NestedNameSpecifier *NNS, QualType NamedType, 1862 QualType CanonType) 1863 : Type(QualifiedName, CanonType, NamedType->isDependentType()), 1864 NNS(NNS), NamedType(NamedType) { } 1865 1866 friend class ASTContext; // ASTContext creates these 1867 1868public: 1869 /// \brief Retrieve the qualification on this type. 1870 NestedNameSpecifier *getQualifier() const { return NNS; } 1871 1872 /// \brief Retrieve the type named by the qualified-id. 1873 QualType getNamedType() const { return NamedType; } 1874 1875 virtual void getAsStringInternal(std::string &InnerString, 1876 const PrintingPolicy &Policy) const; 1877 1878 void Profile(llvm::FoldingSetNodeID &ID) { 1879 Profile(ID, NNS, NamedType); 1880 } 1881 1882 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 1883 QualType NamedType) { 1884 ID.AddPointer(NNS); 1885 NamedType.Profile(ID); 1886 } 1887 1888 static bool classof(const Type *T) { 1889 return T->getTypeClass() == QualifiedName; 1890 } 1891 static bool classof(const QualifiedNameType *T) { return true; } 1892}; 1893 1894/// \brief Represents a 'typename' specifier that names a type within 1895/// a dependent type, e.g., "typename T::type". 1896/// 1897/// TypenameType has a very similar structure to QualifiedNameType, 1898/// which also involves a nested-name-specifier following by a type, 1899/// and (FIXME!) both can even be prefixed by the 'typename' 1900/// keyword. However, the two types serve very different roles: 1901/// QualifiedNameType is a non-semantic type that serves only as sugar 1902/// to show how a particular type was written in the source 1903/// code. TypenameType, on the other hand, only occurs when the 1904/// nested-name-specifier is dependent, such that we cannot resolve 1905/// the actual type until after instantiation. 1906class TypenameType : public Type, public llvm::FoldingSetNode { 1907 /// \brief The nested name specifier containing the qualifier. 1908 NestedNameSpecifier *NNS; 1909 1910 typedef llvm::PointerUnion<const IdentifierInfo *, 1911 const TemplateSpecializationType *> NameType; 1912 1913 /// \brief The type that this typename specifier refers to. 1914 NameType Name; 1915 1916 TypenameType(NestedNameSpecifier *NNS, const IdentifierInfo *Name, 1917 QualType CanonType) 1918 : Type(Typename, CanonType, true), NNS(NNS), Name(Name) { 1919 assert(NNS->isDependent() && 1920 "TypenameType requires a dependent nested-name-specifier"); 1921 } 1922 1923 TypenameType(NestedNameSpecifier *NNS, const TemplateSpecializationType *Ty, 1924 QualType CanonType) 1925 : Type(Typename, CanonType, true), NNS(NNS), Name(Ty) { 1926 assert(NNS->isDependent() && 1927 "TypenameType requires a dependent nested-name-specifier"); 1928 } 1929 1930 friend class ASTContext; // ASTContext creates these 1931 1932public: 1933 /// \brief Retrieve the qualification on this type. 1934 NestedNameSpecifier *getQualifier() const { return NNS; } 1935 1936 /// \brief Retrieve the type named by the typename specifier as an 1937 /// identifier. 1938 /// 1939 /// This routine will return a non-NULL identifier pointer when the 1940 /// form of the original typename was terminated by an identifier, 1941 /// e.g., "typename T::type". 1942 const IdentifierInfo *getIdentifier() const { 1943 return Name.dyn_cast<const IdentifierInfo *>(); 1944 } 1945 1946 /// \brief Retrieve the type named by the typename specifier as a 1947 /// type specialization. 1948 const TemplateSpecializationType *getTemplateId() const { 1949 return Name.dyn_cast<const TemplateSpecializationType *>(); 1950 } 1951 1952 virtual void getAsStringInternal(std::string &InnerString, 1953 const PrintingPolicy &Policy) const; 1954 1955 void Profile(llvm::FoldingSetNodeID &ID) { 1956 Profile(ID, NNS, Name); 1957 } 1958 1959 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 1960 NameType Name) { 1961 ID.AddPointer(NNS); 1962 ID.AddPointer(Name.getOpaqueValue()); 1963 } 1964 1965 static bool classof(const Type *T) { 1966 return T->getTypeClass() == Typename; 1967 } 1968 static bool classof(const TypenameType *T) { return true; } 1969}; 1970 1971/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 1972/// object oriented design. They basically correspond to C++ classes. There 1973/// are two kinds of interface types, normal interfaces like "NSString" and 1974/// qualified interfaces, which are qualified with a protocol list like 1975/// "NSString<NSCopyable, NSAmazing>". 1976class ObjCInterfaceType : public Type, public llvm::FoldingSetNode { 1977 ObjCInterfaceDecl *Decl; 1978 1979 // List of protocols for this protocol conforming object type 1980 // List is sorted on protocol name. No protocol is enterred more than once. 1981 llvm::SmallVector<ObjCProtocolDecl*, 4> Protocols; 1982 1983 ObjCInterfaceType(ObjCInterfaceDecl *D, 1984 ObjCProtocolDecl **Protos, unsigned NumP) : 1985 Type(ObjCInterface, QualType(), /*Dependent=*/false), 1986 Decl(D), Protocols(Protos, Protos+NumP) { } 1987 friend class ASTContext; // ASTContext creates these. 1988public: 1989 ObjCInterfaceDecl *getDecl() const { return Decl; } 1990 1991 /// getNumProtocols - Return the number of qualifying protocols in this 1992 /// interface type, or 0 if there are none. 1993 unsigned getNumProtocols() const { return Protocols.size(); } 1994 1995 /// qual_iterator and friends: this provides access to the (potentially empty) 1996 /// list of protocols qualifying this interface. 1997 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 1998 qual_iterator qual_begin() const { return Protocols.begin(); } 1999 qual_iterator qual_end() const { return Protocols.end(); } 2000 bool qual_empty() const { return Protocols.size() == 0; } 2001 2002 virtual void getAsStringInternal(std::string &InnerString, 2003 const PrintingPolicy &Policy) const; 2004 2005 void Profile(llvm::FoldingSetNodeID &ID); 2006 static void Profile(llvm::FoldingSetNodeID &ID, 2007 const ObjCInterfaceDecl *Decl, 2008 ObjCProtocolDecl **protocols, unsigned NumProtocols); 2009 2010 static bool classof(const Type *T) { 2011 return T->getTypeClass() == ObjCInterface; 2012 } 2013 static bool classof(const ObjCInterfaceType *) { return true; } 2014}; 2015 2016/// ObjCObjectPointerType - Used to represent 'id', 'Interface *', 'id <p>', 2017/// and 'Interface <p> *'. 2018/// 2019/// Duplicate protocols are removed and protocol list is canonicalized to be in 2020/// alphabetical order. 2021class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 2022 QualType PointeeType; // A builtin or interface type. 2023 2024 // List of protocols for this protocol conforming object type 2025 // List is sorted on protocol name. No protocol is entered more than once. 2026 llvm::SmallVector<ObjCProtocolDecl*, 8> Protocols; 2027 2028 ObjCObjectPointerType(QualType T, ObjCProtocolDecl **Protos, unsigned NumP) : 2029 Type(ObjCObjectPointer, QualType(), /*Dependent=*/false), 2030 PointeeType(T), Protocols(Protos, Protos+NumP) { } 2031 friend class ASTContext; // ASTContext creates these. 2032 2033public: 2034 // Get the pointee type. Pointee will either be: 2035 // - a built-in type (for 'id' and 'Class'). 2036 // - an interface type (for user-defined types). 2037 // - a TypedefType whose canonical type is an interface (as in 'T' below). 2038 // For example: typedef NSObject T; T *var; 2039 QualType getPointeeType() const { return PointeeType; } 2040 2041 const ObjCInterfaceType *getInterfaceType() const { 2042 return PointeeType->getAsObjCInterfaceType(); 2043 } 2044 /// getInterfaceDecl - returns an interface decl for user-defined types. 2045 ObjCInterfaceDecl *getInterfaceDecl() const { 2046 return getInterfaceType() ? getInterfaceType()->getDecl() : 0; 2047 } 2048 /// isObjCIdType - true for "id". 2049 bool isObjCIdType() const { 2050 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCId) && 2051 !Protocols.size(); 2052 } 2053 /// isObjCClassType - true for "Class". 2054 bool isObjCClassType() const { 2055 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCClass) && 2056 !Protocols.size(); 2057 } 2058 /// isObjCQualifiedIdType - true for "id <p>". 2059 bool isObjCQualifiedIdType() const { 2060 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCId) && 2061 Protocols.size(); 2062 } 2063 /// isObjCQualifiedClassType - true for "Class <p>". 2064 bool isObjCQualifiedClassType() const { 2065 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCClass) && 2066 Protocols.size(); 2067 } 2068 /// qual_iterator and friends: this provides access to the (potentially empty) 2069 /// list of protocols qualifying this interface. 2070 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 2071 2072 qual_iterator qual_begin() const { return Protocols.begin(); } 2073 qual_iterator qual_end() const { return Protocols.end(); } 2074 bool qual_empty() const { return Protocols.size() == 0; } 2075 2076 /// getNumProtocols - Return the number of qualifying protocols in this 2077 /// interface type, or 0 if there are none. 2078 unsigned getNumProtocols() const { return Protocols.size(); } 2079 2080 void Profile(llvm::FoldingSetNodeID &ID); 2081 static void Profile(llvm::FoldingSetNodeID &ID, QualType T, 2082 ObjCProtocolDecl **protocols, unsigned NumProtocols); 2083 virtual void getAsStringInternal(std::string &InnerString, 2084 const PrintingPolicy &Policy) const; 2085 static bool classof(const Type *T) { 2086 return T->getTypeClass() == ObjCObjectPointer; 2087 } 2088 static bool classof(const ObjCObjectPointerType *) { return true; } 2089}; 2090 2091// Inline function definitions. 2092 2093/// getUnqualifiedType - Return the type without any qualifiers. 2094inline QualType QualType::getUnqualifiedType() const { 2095 Type *TP = getTypePtr(); 2096 if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(TP)) 2097 TP = EXTQT->getBaseType(); 2098 return QualType(TP, 0); 2099} 2100 2101/// getAddressSpace - Return the address space of this type. 2102inline unsigned QualType::getAddressSpace() const { 2103 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2104 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 2105 return AT->getElementType().getAddressSpace(); 2106 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 2107 return RT->getAddressSpace(); 2108 if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(CT)) 2109 return EXTQT->getAddressSpace(); 2110 return 0; 2111} 2112 2113/// getObjCGCAttr - Return the gc attribute of this type. 2114inline QualType::GCAttrTypes QualType::getObjCGCAttr() const { 2115 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2116 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 2117 return AT->getElementType().getObjCGCAttr(); 2118 if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(CT)) 2119 return EXTQT->getObjCGCAttr(); 2120 if (const ObjCObjectPointerType *PT = CT->getAsObjCObjectPointerType()) 2121 return PT->getPointeeType().getObjCGCAttr(); 2122 return GCNone; 2123} 2124 2125 /// getNoReturnAttr - Returns true if the type has the noreturn attribute, 2126 /// false otherwise. 2127inline bool QualType::getNoReturnAttr() const { 2128 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2129 if (const PointerType *PT = getTypePtr()->getAsPointerType()) { 2130 if (const FunctionType *FT = PT->getPointeeType()->getAsFunctionType()) 2131 return FT->getNoReturnAttr(); 2132 } else if (const FunctionType *FT = getTypePtr()->getAsFunctionType()) 2133 return FT->getNoReturnAttr(); 2134 2135 return false; 2136} 2137 2138/// isMoreQualifiedThan - Determine whether this type is more 2139/// qualified than the Other type. For example, "const volatile int" 2140/// is more qualified than "const int", "volatile int", and 2141/// "int". However, it is not more qualified than "const volatile 2142/// int". 2143inline bool QualType::isMoreQualifiedThan(QualType Other) const { 2144 unsigned MyQuals = this->getCVRQualifiers(); 2145 unsigned OtherQuals = Other.getCVRQualifiers(); 2146 if (getAddressSpace() != Other.getAddressSpace()) 2147 return false; 2148 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 2149} 2150 2151/// isAtLeastAsQualifiedAs - Determine whether this type is at last 2152/// as qualified as the Other type. For example, "const volatile 2153/// int" is at least as qualified as "const int", "volatile int", 2154/// "int", and "const volatile int". 2155inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 2156 unsigned MyQuals = this->getCVRQualifiers(); 2157 unsigned OtherQuals = Other.getCVRQualifiers(); 2158 if (getAddressSpace() != Other.getAddressSpace()) 2159 return false; 2160 return (MyQuals | OtherQuals) == MyQuals; 2161} 2162 2163/// getNonReferenceType - If Type is a reference type (e.g., const 2164/// int&), returns the type that the reference refers to ("const 2165/// int"). Otherwise, returns the type itself. This routine is used 2166/// throughout Sema to implement C++ 5p6: 2167/// 2168/// If an expression initially has the type "reference to T" (8.3.2, 2169/// 8.5.3), the type is adjusted to "T" prior to any further 2170/// analysis, the expression designates the object or function 2171/// denoted by the reference, and the expression is an lvalue. 2172inline QualType QualType::getNonReferenceType() const { 2173 if (const ReferenceType *RefType = (*this)->getAsReferenceType()) 2174 return RefType->getPointeeType(); 2175 else 2176 return *this; 2177} 2178 2179inline const TypedefType* Type::getAsTypedefType() const { 2180 return dyn_cast<TypedefType>(this); 2181} 2182inline const ObjCInterfaceType *Type::getAsPointerToObjCInterfaceType() const { 2183 if (const PointerType *PT = getAsPointerType()) 2184 return PT->getPointeeType()->getAsObjCInterfaceType(); 2185 return 0; 2186} 2187 2188// NOTE: All of these methods use "getUnqualifiedType" to strip off address 2189// space qualifiers if present. 2190inline bool Type::isFunctionType() const { 2191 return isa<FunctionType>(CanonicalType.getUnqualifiedType()); 2192} 2193inline bool Type::isPointerType() const { 2194 return isa<PointerType>(CanonicalType.getUnqualifiedType()); 2195} 2196inline bool Type::isAnyPointerType() const { 2197 return isPointerType() || isObjCObjectPointerType(); 2198} 2199inline bool Type::isBlockPointerType() const { 2200 return isa<BlockPointerType>(CanonicalType.getUnqualifiedType()); 2201} 2202inline bool Type::isReferenceType() const { 2203 return isa<ReferenceType>(CanonicalType.getUnqualifiedType()); 2204} 2205inline bool Type::isLValueReferenceType() const { 2206 return isa<LValueReferenceType>(CanonicalType.getUnqualifiedType()); 2207} 2208inline bool Type::isRValueReferenceType() const { 2209 return isa<RValueReferenceType>(CanonicalType.getUnqualifiedType()); 2210} 2211inline bool Type::isFunctionPointerType() const { 2212 if (const PointerType* T = getAsPointerType()) 2213 return T->getPointeeType()->isFunctionType(); 2214 else 2215 return false; 2216} 2217inline bool Type::isMemberPointerType() const { 2218 return isa<MemberPointerType>(CanonicalType.getUnqualifiedType()); 2219} 2220inline bool Type::isMemberFunctionPointerType() const { 2221 if (const MemberPointerType* T = getAsMemberPointerType()) 2222 return T->getPointeeType()->isFunctionType(); 2223 else 2224 return false; 2225} 2226inline bool Type::isArrayType() const { 2227 return isa<ArrayType>(CanonicalType.getUnqualifiedType()); 2228} 2229inline bool Type::isConstantArrayType() const { 2230 return isa<ConstantArrayType>(CanonicalType.getUnqualifiedType()); 2231} 2232inline bool Type::isIncompleteArrayType() const { 2233 return isa<IncompleteArrayType>(CanonicalType.getUnqualifiedType()); 2234} 2235inline bool Type::isVariableArrayType() const { 2236 return isa<VariableArrayType>(CanonicalType.getUnqualifiedType()); 2237} 2238inline bool Type::isDependentSizedArrayType() const { 2239 return isa<DependentSizedArrayType>(CanonicalType.getUnqualifiedType()); 2240} 2241inline bool Type::isRecordType() const { 2242 return isa<RecordType>(CanonicalType.getUnqualifiedType()); 2243} 2244inline bool Type::isAnyComplexType() const { 2245 return isa<ComplexType>(CanonicalType.getUnqualifiedType()); 2246} 2247inline bool Type::isVectorType() const { 2248 return isa<VectorType>(CanonicalType.getUnqualifiedType()); 2249} 2250inline bool Type::isExtVectorType() const { 2251 return isa<ExtVectorType>(CanonicalType.getUnqualifiedType()); 2252} 2253inline bool Type::isObjCObjectPointerType() const { 2254 return isa<ObjCObjectPointerType>(CanonicalType.getUnqualifiedType()); 2255} 2256inline bool Type::isObjCInterfaceType() const { 2257 return isa<ObjCInterfaceType>(CanonicalType.getUnqualifiedType()); 2258} 2259inline bool Type::isObjCQualifiedIdType() const { 2260 if (const ObjCObjectPointerType *OPT = getAsObjCObjectPointerType()) 2261 return OPT->isObjCQualifiedIdType(); 2262 return false; 2263} 2264inline bool Type::isObjCQualifiedClassType() const { 2265 if (const ObjCObjectPointerType *OPT = getAsObjCObjectPointerType()) 2266 return OPT->isObjCQualifiedClassType(); 2267 return false; 2268} 2269inline bool Type::isObjCIdType() const { 2270 if (const ObjCObjectPointerType *OPT = getAsObjCObjectPointerType()) 2271 return OPT->isObjCIdType(); 2272 return false; 2273} 2274inline bool Type::isObjCClassType() const { 2275 if (const ObjCObjectPointerType *OPT = getAsObjCObjectPointerType()) 2276 return OPT->isObjCClassType(); 2277 return false; 2278} 2279inline bool Type::isObjCBuiltinType() const { 2280 return isObjCIdType() || isObjCClassType(); 2281} 2282inline bool Type::isTemplateTypeParmType() const { 2283 return isa<TemplateTypeParmType>(CanonicalType.getUnqualifiedType()); 2284} 2285 2286inline bool Type::isSpecificBuiltinType(unsigned K) const { 2287 if (const BuiltinType *BT = getAsBuiltinType()) 2288 if (BT->getKind() == (BuiltinType::Kind) K) 2289 return true; 2290 return false; 2291} 2292 2293/// \brief Determines whether this is a type for which one can define 2294/// an overloaded operator. 2295inline bool Type::isOverloadableType() const { 2296 return isDependentType() || isRecordType() || isEnumeralType(); 2297} 2298 2299inline bool Type::hasPointerRepresentation() const { 2300 return (isPointerType() || isReferenceType() || isBlockPointerType() || 2301 isObjCInterfaceType() || isObjCObjectPointerType() || 2302 isObjCQualifiedInterfaceType() || isNullPtrType()); 2303} 2304 2305inline bool Type::hasObjCPointerRepresentation() const { 2306 return (isObjCInterfaceType() || isObjCObjectPointerType() || 2307 isObjCQualifiedInterfaceType()); 2308} 2309 2310/// Insertion operator for diagnostics. This allows sending QualType's into a 2311/// diagnostic with <<. 2312inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 2313 QualType T) { 2314 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 2315 Diagnostic::ak_qualtype); 2316 return DB; 2317} 2318 2319/// Member-template getAs<specific type>'. 2320template <typename T> const T *Type::getAs() const { 2321 // If this is directly a T type, return it. 2322 if (const T *Ty = dyn_cast<T>(this)) 2323 return Ty; 2324 2325 // If the canonical form of this type isn't the right kind, reject it. 2326 if (!isa<T>(CanonicalType)) { 2327 // Look through type qualifiers 2328 if (isa<T>(CanonicalType.getUnqualifiedType())) 2329 return CanonicalType.getUnqualifiedType()->getAs<T>(); 2330 return 0; 2331 } 2332 2333 // If this is a typedef for a pointer type, strip the typedef off without 2334 // losing all typedef information. 2335 return cast<T>(getDesugaredType()); 2336} 2337 2338} // end namespace clang 2339 2340#endif 2341