Type.h revision 3ddc81456e4ee7e1017f17860053f3eec505a50e
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/Support/type_traits.h" 23#include "llvm/ADT/APSInt.h" 24#include "llvm/ADT/FoldingSet.h" 25#include "llvm/ADT/PointerIntPair.h" 26#include "llvm/ADT/PointerUnion.h" 27 28using llvm::isa; 29using llvm::cast; 30using llvm::cast_or_null; 31using llvm::dyn_cast; 32using llvm::dyn_cast_or_null; 33namespace clang { class Type; class ExtQuals; } 34 35namespace llvm { 36 template <typename T> 37 class PointerLikeTypeTraits; 38 template<> 39 class PointerLikeTypeTraits< ::clang::Type*> { 40 public: 41 static inline void *getAsVoidPointer(::clang::Type *P) { return P; } 42 static inline ::clang::Type *getFromVoidPointer(void *P) { 43 return static_cast< ::clang::Type*>(P); 44 } 45 enum { NumLowBitsAvailable = 3 }; 46 }; 47 template<> 48 class PointerLikeTypeTraits< ::clang::ExtQuals*> { 49 public: 50 static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; } 51 static inline ::clang::ExtQuals *getFromVoidPointer(void *P) { 52 return static_cast< ::clang::ExtQuals*>(P); 53 } 54 enum { NumLowBitsAvailable = 3 }; 55 }; 56} 57 58namespace clang { 59 class ASTContext; 60 class TypedefDecl; 61 class TemplateDecl; 62 class TemplateTypeParmDecl; 63 class NonTypeTemplateParmDecl; 64 class TemplateTemplateParmDecl; 65 class TagDecl; 66 class RecordDecl; 67 class CXXRecordDecl; 68 class EnumDecl; 69 class FieldDecl; 70 class ObjCInterfaceDecl; 71 class ObjCProtocolDecl; 72 class ObjCMethodDecl; 73 class Expr; 74 class Stmt; 75 class SourceLocation; 76 class StmtIteratorBase; 77 class TemplateArgument; 78 class QualifiedNameType; 79 struct PrintingPolicy; 80 81 // Provide forward declarations for all of the *Type classes 82#define TYPE(Class, Base) class Class##Type; 83#include "clang/AST/TypeNodes.def" 84 85/// Qualifiers - The collection of all-type qualifiers we support. 86/// Clang supports five independent qualifiers: 87/// * C99: const, volatile, and restrict 88/// * Embedded C (TR18037): address spaces 89/// * Objective C: the GC attributes (none, weak, or strong) 90class Qualifiers { 91public: 92 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 93 Const = 0x1, 94 Restrict = 0x2, 95 Volatile = 0x4, 96 CVRMask = Const | Volatile | Restrict 97 }; 98 99 enum GC { 100 GCNone = 0, 101 Weak, 102 Strong 103 }; 104 105 enum { 106 /// The maximum supported address space number. 107 /// 24 bits should be enough for anyone. 108 MaxAddressSpace = 0xffffffu, 109 110 /// The width of the "fast" qualifier mask. 111 FastWidth = 2, 112 113 /// The fast qualifier mask. 114 FastMask = (1 << FastWidth) - 1 115 }; 116 117 Qualifiers() : Mask(0) {} 118 119 static Qualifiers fromFastMask(unsigned Mask) { 120 Qualifiers Qs; 121 Qs.addFastQualifiers(Mask); 122 return Qs; 123 } 124 125 static Qualifiers fromCVRMask(unsigned CVR) { 126 Qualifiers Qs; 127 Qs.addCVRQualifiers(CVR); 128 return Qs; 129 } 130 131 // Deserialize qualifiers from an opaque representation. 132 static Qualifiers fromOpaqueValue(unsigned opaque) { 133 Qualifiers Qs; 134 Qs.Mask = opaque; 135 return Qs; 136 } 137 138 // Serialize these qualifiers into an opaque representation. 139 unsigned getAsOpaqueValue() const { 140 return Mask; 141 } 142 143 bool hasConst() const { return Mask & Const; } 144 void setConst(bool flag) { 145 Mask = (Mask & ~Const) | (flag ? Const : 0); 146 } 147 void removeConst() { Mask &= ~Const; } 148 void addConst() { Mask |= Const; } 149 150 bool hasVolatile() const { return Mask & Volatile; } 151 void setVolatile(bool flag) { 152 Mask = (Mask & ~Volatile) | (flag ? Volatile : 0); 153 } 154 void removeVolatile() { Mask &= ~Volatile; } 155 void addVolatile() { Mask |= Volatile; } 156 157 bool hasRestrict() const { return Mask & Restrict; } 158 void setRestrict(bool flag) { 159 Mask = (Mask & ~Restrict) | (flag ? Restrict : 0); 160 } 161 void removeRestrict() { Mask &= ~Restrict; } 162 void addRestrict() { Mask |= Restrict; } 163 164 bool hasCVRQualifiers() const { return getCVRQualifiers(); } 165 unsigned getCVRQualifiers() const { return Mask & CVRMask; } 166 void setCVRQualifiers(unsigned mask) { 167 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 168 Mask = (Mask & ~CVRMask) | mask; 169 } 170 void removeCVRQualifiers(unsigned mask) { 171 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 172 Mask &= ~mask; 173 } 174 void removeCVRQualifiers() { 175 removeCVRQualifiers(CVRMask); 176 } 177 void addCVRQualifiers(unsigned mask) { 178 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 179 Mask |= mask; 180 } 181 182 bool hasObjCGCAttr() const { return Mask & GCAttrMask; } 183 GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); } 184 void setObjCGCAttr(GC type) { 185 Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift); 186 } 187 void removeObjCGCAttr() { setObjCGCAttr(GCNone); } 188 void addObjCGCAttr(GC type) { 189 assert(type); 190 setObjCGCAttr(type); 191 } 192 193 bool hasAddressSpace() const { return Mask & AddressSpaceMask; } 194 unsigned getAddressSpace() const { return Mask >> AddressSpaceShift; } 195 void setAddressSpace(unsigned space) { 196 assert(space <= MaxAddressSpace); 197 Mask = (Mask & ~AddressSpaceMask) 198 | (((uint32_t) space) << AddressSpaceShift); 199 } 200 void removeAddressSpace() { setAddressSpace(0); } 201 void addAddressSpace(unsigned space) { 202 assert(space); 203 setAddressSpace(space); 204 } 205 206 // Fast qualifiers are those that can be allocated directly 207 // on a QualType object. 208 bool hasFastQualifiers() const { return getFastQualifiers(); } 209 unsigned getFastQualifiers() const { return Mask & FastMask; } 210 void setFastQualifiers(unsigned mask) { 211 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 212 Mask = (Mask & ~FastMask) | mask; 213 } 214 void removeFastQualifiers(unsigned mask) { 215 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 216 Mask &= ~mask; 217 } 218 void removeFastQualifiers() { 219 removeFastQualifiers(FastMask); 220 } 221 void addFastQualifiers(unsigned mask) { 222 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 223 Mask |= mask; 224 } 225 226 /// hasNonFastQualifiers - Return true if the set contains any 227 /// qualifiers which require an ExtQuals node to be allocated. 228 bool hasNonFastQualifiers() const { return Mask & ~FastMask; } 229 Qualifiers getNonFastQualifiers() const { 230 Qualifiers Quals = *this; 231 Quals.setFastQualifiers(0); 232 return Quals; 233 } 234 235 /// hasQualifiers - Return true if the set contains any qualifiers. 236 bool hasQualifiers() const { return Mask; } 237 bool empty() const { return !Mask; } 238 239 /// \brief Add the qualifiers from the given set to this set. 240 void addQualifiers(Qualifiers Q) { 241 // If the other set doesn't have any non-boolean qualifiers, just 242 // bit-or it in. 243 if (!(Q.Mask & ~CVRMask)) 244 Mask |= Q.Mask; 245 else { 246 Mask |= (Q.Mask & CVRMask); 247 if (Q.hasAddressSpace()) 248 addAddressSpace(Q.getAddressSpace()); 249 if (Q.hasObjCGCAttr()) 250 addObjCGCAttr(Q.getObjCGCAttr()); 251 } 252 } 253 254 bool operator==(Qualifiers Other) const { return Mask == Other.Mask; } 255 bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; } 256 257 operator bool() const { return hasQualifiers(); } 258 259 Qualifiers &operator+=(Qualifiers R) { 260 addQualifiers(R); 261 return *this; 262 } 263 264 // Union two qualifier sets. If an enumerated qualifier appears 265 // in both sets, use the one from the right. 266 friend Qualifiers operator+(Qualifiers L, Qualifiers R) { 267 L += R; 268 return L; 269 } 270 271 std::string getAsString() const; 272 std::string getAsString(const PrintingPolicy &Policy) const { 273 std::string Buffer; 274 getAsStringInternal(Buffer, Policy); 275 return Buffer; 276 } 277 void getAsStringInternal(std::string &S, const PrintingPolicy &Policy) const; 278 279 void Profile(llvm::FoldingSetNodeID &ID) const { 280 ID.AddInteger(Mask); 281 } 282 283private: 284 285 // bits: |0 1 2|3 .. 4|5 .. 31| 286 // |C R V|GCAttr|AddrSpace| 287 uint32_t Mask; 288 289 static const uint32_t GCAttrMask = 0x18; 290 static const uint32_t GCAttrShift = 3; 291 static const uint32_t AddressSpaceMask = ~(CVRMask | GCAttrMask); 292 static const uint32_t AddressSpaceShift = 5; 293}; 294 295 296/// ExtQuals - We can encode up to three bits in the low bits of a 297/// type pointer, but there are many more type qualifiers that we want 298/// to be able to apply to an arbitrary type. Therefore we have this 299/// struct, intended to be heap-allocated and used by QualType to 300/// store qualifiers. 301/// 302/// The current design tags the 'const' and 'restrict' qualifiers in 303/// two low bits on the QualType pointer; a third bit records whether 304/// the pointer is an ExtQuals node. 'const' was chosen because it is 305/// orders of magnitude more common than the other two qualifiers, in 306/// both library and user code. It's relatively rare to see 307/// 'restrict' in user code, but many standard C headers are saturated 308/// with 'restrict' declarations, so that representing them efficiently 309/// is a critical goal of this representation. 310class ExtQuals : public llvm::FoldingSetNode { 311 // NOTE: changing the fast qualifiers should be straightforward as 312 // long as you don't make 'const' non-fast. 313 // 1. Qualifiers: 314 // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). 315 // Fast qualifiers must occupy the low-order bits. 316 // b) Update Qualifiers::FastWidth and FastMask. 317 // 2. QualType: 318 // a) Update is{Volatile,Restrict}Qualified(), defined inline. 319 // b) Update remove{Volatile,Restrict}, defined near the end of 320 // this header. 321 // 3. ASTContext: 322 // a) Update get{Volatile,Restrict}Type. 323 324 /// Context - the context to which this set belongs. We save this 325 /// here so that QualifierCollector can use it to reapply extended 326 /// qualifiers to an arbitrary type without requiring a context to 327 /// be pushed through every single API dealing with qualifiers. 328 ASTContext& Context; 329 330 /// BaseType - the underlying type that this qualifies 331 const Type *BaseType; 332 333 /// Quals - the immutable set of qualifiers applied by this 334 /// node; always contains extended qualifiers. 335 Qualifiers Quals; 336 337public: 338 ExtQuals(ASTContext& Context, const Type *Base, Qualifiers Quals) 339 : Context(Context), BaseType(Base), Quals(Quals) 340 { 341 assert(Quals.hasNonFastQualifiers() 342 && "ExtQuals created with no fast qualifiers"); 343 assert(!Quals.hasFastQualifiers() 344 && "ExtQuals created with fast qualifiers"); 345 } 346 347 Qualifiers getQualifiers() const { return Quals; } 348 349 bool hasVolatile() const { return Quals.hasVolatile(); } 350 351 bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } 352 Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } 353 354 bool hasAddressSpace() const { return Quals.hasAddressSpace(); } 355 unsigned getAddressSpace() const { return Quals.getAddressSpace(); } 356 357 const Type *getBaseType() const { return BaseType; } 358 359 ASTContext &getContext() const { return Context; } 360 361public: 362 void Profile(llvm::FoldingSetNodeID &ID) const { 363 Profile(ID, getBaseType(), Quals); 364 } 365 static void Profile(llvm::FoldingSetNodeID &ID, 366 const Type *BaseType, 367 Qualifiers Quals) { 368 assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!"); 369 ID.AddPointer(BaseType); 370 Quals.Profile(ID); 371 } 372}; 373 374 375/// QualType - For efficiency, we don't store CV-qualified types as nodes on 376/// their own: instead each reference to a type stores the qualifiers. This 377/// greatly reduces the number of nodes we need to allocate for types (for 378/// example we only need one for 'int', 'const int', 'volatile int', 379/// 'const volatile int', etc). 380/// 381/// As an added efficiency bonus, instead of making this a pair, we 382/// just store the two bits we care about in the low bits of the 383/// pointer. To handle the packing/unpacking, we make QualType be a 384/// simple wrapper class that acts like a smart pointer. A third bit 385/// indicates whether there are extended qualifiers present, in which 386/// case the pointer points to a special structure. 387class QualType { 388 // Thankfully, these are efficiently composable. 389 llvm::PointerIntPair<llvm::PointerUnion<const Type*,const ExtQuals*>, 390 Qualifiers::FastWidth> Value; 391 392 bool hasExtQuals() const { 393 return Value.getPointer().is<const ExtQuals*>(); 394 } 395 396 const ExtQuals *getExtQualsUnsafe() const { 397 return Value.getPointer().get<const ExtQuals*>(); 398 } 399 400 const Type *getTypePtrUnsafe() const { 401 return Value.getPointer().get<const Type*>(); 402 } 403 404 friend class QualifierCollector; 405public: 406 QualType() {} 407 408 QualType(const Type *Ptr, unsigned Quals) 409 : Value(Ptr, Quals) {} 410 QualType(const ExtQuals *Ptr, unsigned Quals) 411 : Value(Ptr, Quals) {} 412 413 unsigned getFastQualifiers() const { return Value.getInt(); } 414 void setFastQualifiers(unsigned Quals) { Value.setInt(Quals); } 415 416 /// Retrieves a pointer to the underlying (unqualified) type. 417 /// This should really return a const Type, but it's not worth 418 /// changing all the users right now. 419 Type *getTypePtr() const { 420 if (hasNonFastQualifiers()) 421 return const_cast<Type*>(getExtQualsUnsafe()->getBaseType()); 422 return const_cast<Type*>(getTypePtrUnsafe()); 423 } 424 425 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 426 static QualType getFromOpaquePtr(void *Ptr) { 427 QualType T; 428 T.Value.setFromOpaqueValue(Ptr); 429 return T; 430 } 431 432 Type &operator*() const { 433 return *getTypePtr(); 434 } 435 436 Type *operator->() const { 437 return getTypePtr(); 438 } 439 440 /// isNull - Return true if this QualType doesn't point to a type yet. 441 bool isNull() const { 442 return Value.getPointer().isNull(); 443 } 444 445 bool isConstQualified() const { 446 return (getFastQualifiers() & Qualifiers::Const); 447 } 448 bool isRestrictQualified() const { 449 return (getFastQualifiers() & Qualifiers::Restrict); 450 } 451 bool isVolatileQualified() const { 452 return (hasNonFastQualifiers() && getExtQualsUnsafe()->hasVolatile()); 453 } 454 455 // Determines whether this type has any direct qualifiers. 456 bool hasQualifiers() const { 457 return getFastQualifiers() || hasNonFastQualifiers(); 458 } 459 460 bool hasNonFastQualifiers() const { 461 return hasExtQuals(); 462 } 463 464 // Retrieves the set of qualifiers belonging to this type. 465 Qualifiers getQualifiers() const { 466 Qualifiers Quals; 467 if (hasNonFastQualifiers()) 468 Quals = getExtQualsUnsafe()->getQualifiers(); 469 Quals.addFastQualifiers(getFastQualifiers()); 470 return Quals; 471 } 472 473 // Retrieves the CVR qualifiers of this type. 474 unsigned getCVRQualifiers() const { 475 unsigned CVR = getFastQualifiers(); 476 if (isVolatileQualified()) CVR |= Qualifiers::Volatile; 477 return CVR; 478 } 479 480 bool isConstant(ASTContext& Ctx) const; 481 482 // Don't promise in the API that anything besides 'const' can be 483 // easily added. 484 485 /// addConst - add the specified type qualifier to this QualType. 486 void addConst() { 487 addFastQualifiers(Qualifiers::Const); 488 } 489 QualType withConst() const { 490 return withFastQualifiers(Qualifiers::Const); 491 } 492 493 void addFastQualifiers(unsigned TQs) { 494 assert(!(TQs & ~Qualifiers::FastMask) 495 && "non-fast qualifier bits set in mask!"); 496 Value.setInt(Value.getInt() | TQs); 497 } 498 499 void removeConst(); 500 void removeVolatile(); 501 void removeRestrict(); 502 void removeCVRQualifiers(unsigned Mask); 503 504 void removeFastQualifiers() { Value.setInt(0); } 505 void removeFastQualifiers(unsigned Mask) { 506 assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers"); 507 Value.setInt(Value.getInt() & ~Mask); 508 } 509 510 // Creates a type with the given qualifiers in addition to any 511 // qualifiers already on this type. 512 QualType withFastQualifiers(unsigned TQs) const { 513 QualType T = *this; 514 T.addFastQualifiers(TQs); 515 return T; 516 } 517 518 // Creates a type with exactly the given fast qualifiers, removing 519 // any existing fast qualifiers. 520 QualType withExactFastQualifiers(unsigned TQs) const { 521 return withoutFastQualifiers().withFastQualifiers(TQs); 522 } 523 524 // Removes fast qualifiers, but leaves any extended qualifiers in place. 525 QualType withoutFastQualifiers() const { 526 QualType T = *this; 527 T.removeFastQualifiers(); 528 return T; 529 } 530 531 QualType getUnqualifiedType() const { return QualType(getTypePtr(), 0); } 532 533 bool isMoreQualifiedThan(QualType Other) const; 534 bool isAtLeastAsQualifiedAs(QualType Other) const; 535 QualType getNonReferenceType() const; 536 537 /// getDesugaredType - Return the specified type with any "sugar" removed from 538 /// the type. This takes off typedefs, typeof's etc. If the outer level of 539 /// the type is already concrete, it returns it unmodified. This is similar 540 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 541 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 542 /// concrete. 543 /// 544 /// Qualifiers are left in place. 545 QualType getDesugaredType(bool ForDisplay = false) const; 546 547 /// operator==/!= - Indicate whether the specified types and qualifiers are 548 /// identical. 549 friend bool operator==(const QualType &LHS, const QualType &RHS) { 550 return LHS.Value == RHS.Value; 551 } 552 friend bool operator!=(const QualType &LHS, const QualType &RHS) { 553 return LHS.Value != RHS.Value; 554 } 555 std::string getAsString() const; 556 557 std::string getAsString(const PrintingPolicy &Policy) const { 558 std::string S; 559 getAsStringInternal(S, Policy); 560 return S; 561 } 562 void getAsStringInternal(std::string &Str, 563 const PrintingPolicy &Policy) const; 564 565 void dump(const char *s) const; 566 void dump() const; 567 568 void Profile(llvm::FoldingSetNodeID &ID) const { 569 ID.AddPointer(getAsOpaquePtr()); 570 } 571 572 /// getAddressSpace - Return the address space of this type. 573 inline unsigned getAddressSpace() const; 574 575 /// GCAttrTypesAttr - Returns gc attribute of this type. 576 inline Qualifiers::GC getObjCGCAttr() const; 577 578 /// isObjCGCWeak true when Type is objc's weak. 579 bool isObjCGCWeak() const { 580 return getObjCGCAttr() == Qualifiers::Weak; 581 } 582 583 /// isObjCGCStrong true when Type is objc's strong. 584 bool isObjCGCStrong() const { 585 return getObjCGCAttr() == Qualifiers::Strong; 586 } 587 588 /// getNoReturnAttr - Returns true if the type has the noreturn attribute, 589 /// false otherwise. 590 bool getNoReturnAttr() const; 591}; 592 593} // end clang. 594 595namespace llvm { 596/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 597/// to a specific Type class. 598template<> struct simplify_type<const ::clang::QualType> { 599 typedef ::clang::Type* SimpleType; 600 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 601 return Val.getTypePtr(); 602 } 603}; 604template<> struct simplify_type< ::clang::QualType> 605 : public simplify_type<const ::clang::QualType> {}; 606 607// Teach SmallPtrSet that QualType is "basically a pointer". 608template<> 609class PointerLikeTypeTraits<clang::QualType> { 610public: 611 static inline void *getAsVoidPointer(clang::QualType P) { 612 return P.getAsOpaquePtr(); 613 } 614 static inline clang::QualType getFromVoidPointer(void *P) { 615 return clang::QualType::getFromOpaquePtr(P); 616 } 617 // Various qualifiers go in low bits. 618 enum { NumLowBitsAvailable = 0 }; 619}; 620 621} // end namespace llvm 622 623namespace clang { 624 625/// Type - This is the base class of the type hierarchy. A central concept 626/// with types is that each type always has a canonical type. A canonical type 627/// is the type with any typedef names stripped out of it or the types it 628/// references. For example, consider: 629/// 630/// typedef int foo; 631/// typedef foo* bar; 632/// 'int *' 'foo *' 'bar' 633/// 634/// There will be a Type object created for 'int'. Since int is canonical, its 635/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 636/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 637/// there is a PointerType that represents 'int*', which, like 'int', is 638/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 639/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 640/// is also 'int*'. 641/// 642/// Non-canonical types are useful for emitting diagnostics, without losing 643/// information about typedefs being used. Canonical types are useful for type 644/// comparisons (they allow by-pointer equality tests) and useful for reasoning 645/// about whether something has a particular form (e.g. is a function type), 646/// because they implicitly, recursively, strip all typedefs out of a type. 647/// 648/// Types, once created, are immutable. 649/// 650class Type { 651public: 652 enum TypeClass { 653#define TYPE(Class, Base) Class, 654#define ABSTRACT_TYPE(Class, Base) 655#include "clang/AST/TypeNodes.def" 656 TagFirst = Record, TagLast = Enum 657 }; 658 659protected: 660 enum { TypeClassBitSize = 6 }; 661 662private: 663 QualType CanonicalType; 664 665 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 666 bool Dependent : 1; 667 668 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 669 /// Note that this should stay at the end of the ivars for Type so that 670 /// subclasses can pack their bitfields into the same word. 671 unsigned TC : TypeClassBitSize; 672 673 Type(const Type&); // DO NOT IMPLEMENT. 674 void operator=(const Type&); // DO NOT IMPLEMENT. 675protected: 676 // silence VC++ warning C4355: 'this' : used in base member initializer list 677 Type *this_() { return this; } 678 Type(TypeClass tc, QualType Canonical, bool dependent) 679 : CanonicalType(Canonical.isNull() ? QualType(this_(), 0) : Canonical), 680 Dependent(dependent), TC(tc) {} 681 virtual ~Type() {} 682 virtual void Destroy(ASTContext& C); 683 friend class ASTContext; 684 685public: 686 TypeClass getTypeClass() const { return static_cast<TypeClass>(TC); } 687 688 bool isCanonical() const { return CanonicalType.getTypePtr() == this; } 689 690 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 691 /// object types, function types, and incomplete types. 692 693 /// \brief Determines whether the type describes an object in memory. 694 /// 695 /// Note that this definition of object type corresponds to the C++ 696 /// definition of object type, which includes incomplete types, as 697 /// opposed to the C definition (which does not include incomplete 698 /// types). 699 bool isObjectType() const; 700 701 /// isIncompleteType - Return true if this is an incomplete type. 702 /// A type that can describe objects, but which lacks information needed to 703 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 704 /// routine will need to determine if the size is actually required. 705 bool isIncompleteType() const; 706 707 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 708 /// type, in other words, not a function type. 709 bool isIncompleteOrObjectType() const { 710 return !isFunctionType(); 711 } 712 713 /// isPODType - Return true if this is a plain-old-data type (C++ 3.9p10). 714 bool isPODType() const; 715 716 /// isVariablyModifiedType (C99 6.7.5.2p2) - Return true for variable array 717 /// types that have a non-constant expression. This does not include "[]". 718 bool isVariablyModifiedType() const; 719 720 /// Helper methods to distinguish type categories. All type predicates 721 /// operate on the canonical type, ignoring typedefs and qualifiers. 722 723 /// isSpecificBuiltinType - Test for a particular builtin type. 724 bool isSpecificBuiltinType(unsigned K) const; 725 726 /// isIntegerType() does *not* include complex integers (a GCC extension). 727 /// isComplexIntegerType() can be used to test for complex integers. 728 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 729 bool isEnumeralType() const; 730 bool isBooleanType() const; 731 bool isCharType() const; 732 bool isWideCharType() const; 733 bool isIntegralType() const; 734 735 /// Floating point categories. 736 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 737 /// isComplexType() does *not* include complex integers (a GCC extension). 738 /// isComplexIntegerType() can be used to test for complex integers. 739 bool isComplexType() const; // C99 6.2.5p11 (complex) 740 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 741 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 742 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 743 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 744 bool isVoidType() const; // C99 6.2.5p19 745 bool isDerivedType() const; // C99 6.2.5p20 746 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 747 bool isAggregateType() const; 748 749 // Type Predicates: Check to see if this type is structurally the specified 750 // type, ignoring typedefs and qualifiers. 751 bool isFunctionType() const; 752 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 753 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 754 bool isPointerType() const; 755 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 756 bool isBlockPointerType() const; 757 bool isVoidPointerType() const; 758 bool isReferenceType() const; 759 bool isLValueReferenceType() const; 760 bool isRValueReferenceType() const; 761 bool isFunctionPointerType() const; 762 bool isMemberPointerType() const; 763 bool isMemberFunctionPointerType() const; 764 bool isArrayType() const; 765 bool isConstantArrayType() const; 766 bool isIncompleteArrayType() const; 767 bool isVariableArrayType() const; 768 bool isDependentSizedArrayType() const; 769 bool isRecordType() const; 770 bool isClassType() const; 771 bool isStructureType() const; 772 bool isUnionType() const; 773 bool isComplexIntegerType() const; // GCC _Complex integer type. 774 bool isVectorType() const; // GCC vector type. 775 bool isExtVectorType() const; // Extended vector type. 776 bool isObjCObjectPointerType() const; // Pointer to *any* ObjC object. 777 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 778 // for the common case. 779 bool isObjCInterfaceType() const; // NSString or NSString<foo> 780 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 781 bool isObjCQualifiedIdType() const; // id<foo> 782 bool isObjCQualifiedClassType() const; // Class<foo> 783 bool isObjCIdType() const; // id 784 bool isObjCClassType() const; // Class 785 bool isObjCBuiltinType() const; // 'id' or 'Class' 786 bool isTemplateTypeParmType() const; // C++ template type parameter 787 bool isNullPtrType() const; // C++0x nullptr_t 788 789 /// isDependentType - Whether this type is a dependent type, meaning 790 /// that its definition somehow depends on a template parameter 791 /// (C++ [temp.dep.type]). 792 bool isDependentType() const { return Dependent; } 793 bool isOverloadableType() const; 794 795 /// hasPointerRepresentation - Whether this type is represented 796 /// natively as a pointer; this includes pointers, references, block 797 /// pointers, and Objective-C interface, qualified id, and qualified 798 /// interface types, as well as nullptr_t. 799 bool hasPointerRepresentation() const; 800 801 /// hasObjCPointerRepresentation - Whether this type can represent 802 /// an objective pointer type for the purpose of GC'ability 803 bool hasObjCPointerRepresentation() const; 804 805 // Type Checking Functions: Check to see if this type is structurally the 806 // specified type, ignoring typedefs and qualifiers, and return a pointer to 807 // the best type we can. 808 const RecordType *getAsStructureType() const; 809 /// NOTE: getAs*ArrayType are methods on ASTContext. 810 const RecordType *getAsUnionType() const; 811 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 812 // The following is a convenience method that returns an ObjCObjectPointerType 813 // for object declared using an interface. 814 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 815 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 816 const ObjCInterfaceType *getAsObjCQualifiedInterfaceType() const; 817 const CXXRecordDecl *getCXXRecordDeclForPointerType() const; 818 819 // Member-template getAs<specific type>'. This scheme will eventually 820 // replace the specific getAsXXXX methods above. 821 // 822 // There are some specializations of this member template listed 823 // immediately following this class. 824 template <typename T> const T *getAs() const; 825 826 /// getAsPointerToObjCInterfaceType - If this is a pointer to an ObjC 827 /// interface, return the interface type, otherwise return null. 828 const ObjCInterfaceType *getAsPointerToObjCInterfaceType() const; 829 830 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 831 /// element type of the array, potentially with type qualifiers missing. 832 /// This method should never be used when type qualifiers are meaningful. 833 const Type *getArrayElementTypeNoTypeQual() const; 834 835 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 836 /// pointer, this returns the respective pointee. 837 QualType getPointeeType() const; 838 839 /// getDesugaredType - Return the specified type with any "sugar" removed from 840 /// the type. This takes off typedefs, typeof's etc. If the outer level of 841 /// the type is already concrete, it returns it unmodified. This is similar 842 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 843 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 844 /// concrete. 845 QualType getDesugaredType(bool ForDisplay = false) const; 846 847 /// More type predicates useful for type checking/promotion 848 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 849 850 /// isSignedIntegerType - Return true if this is an integer type that is 851 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 852 /// an enum decl which has a signed representation, or a vector of signed 853 /// integer element type. 854 bool isSignedIntegerType() const; 855 856 /// isUnsignedIntegerType - Return true if this is an integer type that is 857 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 858 /// decl which has an unsigned representation, or a vector of unsigned integer 859 /// element type. 860 bool isUnsignedIntegerType() const; 861 862 /// isConstantSizeType - Return true if this is not a variable sized type, 863 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 864 /// incomplete types. 865 bool isConstantSizeType() const; 866 867 /// isSpecifierType - Returns true if this type can be represented by some 868 /// set of type specifiers. 869 bool isSpecifierType() const; 870 871 QualType getCanonicalTypeInternal() const { return CanonicalType; } 872 void dump() const; 873 virtual void getAsStringInternal(std::string &InnerString, 874 const PrintingPolicy &Policy) const = 0; 875 static bool classof(const Type *) { return true; } 876}; 877 878template <> inline const TypedefType *Type::getAs() const { 879 return dyn_cast<TypedefType>(this); 880} 881 882// We can do canonical leaf types faster, because we don't have to 883// worry about preserving child type decoration. 884#define TYPE(Class, Base) 885#define LEAF_TYPE(Class) \ 886template <> inline const Class##Type *Type::getAs() const { \ 887 return dyn_cast<Class##Type>(CanonicalType); \ 888} 889#include "clang/AST/TypeNodes.def" 890 891 892/// BuiltinType - This class is used for builtin types like 'int'. Builtin 893/// types are always canonical and have a literal name field. 894class BuiltinType : public Type { 895public: 896 enum Kind { 897 Void, 898 899 Bool, // This is bool and/or _Bool. 900 Char_U, // This is 'char' for targets where char is unsigned. 901 UChar, // This is explicitly qualified unsigned char. 902 Char16, // This is 'char16_t' for C++. 903 Char32, // This is 'char32_t' for C++. 904 UShort, 905 UInt, 906 ULong, 907 ULongLong, 908 UInt128, // __uint128_t 909 910 Char_S, // This is 'char' for targets where char is signed. 911 SChar, // This is explicitly qualified signed char. 912 WChar, // This is 'wchar_t' for C++. 913 Short, 914 Int, 915 Long, 916 LongLong, 917 Int128, // __int128_t 918 919 Float, Double, LongDouble, 920 921 NullPtr, // This is the type of C++0x 'nullptr'. 922 923 Overload, // This represents the type of an overloaded function declaration. 924 Dependent, // This represents the type of a type-dependent expression. 925 926 UndeducedAuto, // In C++0x, this represents the type of an auto variable 927 // that has not been deduced yet. 928 ObjCId, // This represents the ObjC 'id' type. 929 ObjCClass // This represents the ObjC 'Class' type. 930 }; 931private: 932 Kind TypeKind; 933public: 934 BuiltinType(Kind K) 935 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent)), 936 TypeKind(K) {} 937 938 Kind getKind() const { return TypeKind; } 939 const char *getName(const LangOptions &LO) const; 940 941 virtual void getAsStringInternal(std::string &InnerString, 942 const PrintingPolicy &Policy) const; 943 944 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 945 static bool classof(const BuiltinType *) { return true; } 946}; 947 948/// FixedWidthIntType - Used for arbitrary width types that we either don't 949/// want to or can't map to named integer types. These always have a lower 950/// integer rank than builtin types of the same width. 951class FixedWidthIntType : public Type { 952private: 953 unsigned Width; 954 bool Signed; 955public: 956 FixedWidthIntType(unsigned W, bool S) : Type(FixedWidthInt, QualType(), false), 957 Width(W), Signed(S) {} 958 959 unsigned getWidth() const { return Width; } 960 bool isSigned() const { return Signed; } 961 const char *getName() const; 962 963 virtual void getAsStringInternal(std::string &InnerString, 964 const PrintingPolicy &Policy) const; 965 966 static bool classof(const Type *T) { return T->getTypeClass() == FixedWidthInt; } 967 static bool classof(const FixedWidthIntType *) { return true; } 968}; 969 970/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 971/// types (_Complex float etc) as well as the GCC integer complex extensions. 972/// 973class ComplexType : public Type, public llvm::FoldingSetNode { 974 QualType ElementType; 975 ComplexType(QualType Element, QualType CanonicalPtr) : 976 Type(Complex, CanonicalPtr, Element->isDependentType()), 977 ElementType(Element) { 978 } 979 friend class ASTContext; // ASTContext creates these. 980public: 981 QualType getElementType() const { return ElementType; } 982 983 virtual void getAsStringInternal(std::string &InnerString, 984 const PrintingPolicy &Policy) const; 985 986 void Profile(llvm::FoldingSetNodeID &ID) { 987 Profile(ID, getElementType()); 988 } 989 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 990 ID.AddPointer(Element.getAsOpaquePtr()); 991 } 992 993 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 994 static bool classof(const ComplexType *) { return true; } 995}; 996 997/// PointerType - C99 6.7.5.1 - Pointer Declarators. 998/// 999class PointerType : public Type, public llvm::FoldingSetNode { 1000 QualType PointeeType; 1001 1002 PointerType(QualType Pointee, QualType CanonicalPtr) : 1003 Type(Pointer, CanonicalPtr, Pointee->isDependentType()), PointeeType(Pointee) { 1004 } 1005 friend class ASTContext; // ASTContext creates these. 1006public: 1007 1008 virtual void getAsStringInternal(std::string &InnerString, 1009 const PrintingPolicy &Policy) const; 1010 1011 QualType getPointeeType() const { return PointeeType; } 1012 1013 void Profile(llvm::FoldingSetNodeID &ID) { 1014 Profile(ID, getPointeeType()); 1015 } 1016 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1017 ID.AddPointer(Pointee.getAsOpaquePtr()); 1018 } 1019 1020 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1021 static bool classof(const PointerType *) { return true; } 1022}; 1023 1024/// BlockPointerType - pointer to a block type. 1025/// This type is to represent types syntactically represented as 1026/// "void (^)(int)", etc. Pointee is required to always be a function type. 1027/// 1028class BlockPointerType : public Type, public llvm::FoldingSetNode { 1029 QualType PointeeType; // Block is some kind of pointer type 1030 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1031 Type(BlockPointer, CanonicalCls, Pointee->isDependentType()), 1032 PointeeType(Pointee) { 1033 } 1034 friend class ASTContext; // ASTContext creates these. 1035public: 1036 1037 // Get the pointee type. Pointee is required to always be a function type. 1038 QualType getPointeeType() const { return PointeeType; } 1039 1040 virtual void getAsStringInternal(std::string &InnerString, 1041 const PrintingPolicy &Policy) const; 1042 1043 void Profile(llvm::FoldingSetNodeID &ID) { 1044 Profile(ID, getPointeeType()); 1045 } 1046 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1047 ID.AddPointer(Pointee.getAsOpaquePtr()); 1048 } 1049 1050 static bool classof(const Type *T) { 1051 return T->getTypeClass() == BlockPointer; 1052 } 1053 static bool classof(const BlockPointerType *) { return true; } 1054}; 1055 1056/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 1057/// 1058class ReferenceType : public Type, public llvm::FoldingSetNode { 1059 QualType PointeeType; 1060 1061protected: 1062 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef) : 1063 Type(tc, CanonicalRef, Referencee->isDependentType()), 1064 PointeeType(Referencee) { 1065 } 1066public: 1067 QualType getPointeeType() const { return PointeeType; } 1068 1069 void Profile(llvm::FoldingSetNodeID &ID) { 1070 Profile(ID, getPointeeType()); 1071 } 1072 static void Profile(llvm::FoldingSetNodeID &ID, QualType Referencee) { 1073 ID.AddPointer(Referencee.getAsOpaquePtr()); 1074 } 1075 1076 static bool classof(const Type *T) { 1077 return T->getTypeClass() == LValueReference || 1078 T->getTypeClass() == RValueReference; 1079 } 1080 static bool classof(const ReferenceType *) { return true; } 1081}; 1082 1083/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 1084/// 1085class LValueReferenceType : public ReferenceType { 1086 LValueReferenceType(QualType Referencee, QualType CanonicalRef) : 1087 ReferenceType(LValueReference, Referencee, CanonicalRef) { 1088 } 1089 friend class ASTContext; // ASTContext creates these 1090public: 1091 virtual void getAsStringInternal(std::string &InnerString, 1092 const PrintingPolicy &Policy) const; 1093 1094 static bool classof(const Type *T) { 1095 return T->getTypeClass() == LValueReference; 1096 } 1097 static bool classof(const LValueReferenceType *) { return true; } 1098}; 1099 1100/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 1101/// 1102class RValueReferenceType : public ReferenceType { 1103 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 1104 ReferenceType(RValueReference, Referencee, CanonicalRef) { 1105 } 1106 friend class ASTContext; // ASTContext creates these 1107public: 1108 virtual void getAsStringInternal(std::string &InnerString, 1109 const PrintingPolicy &Policy) const; 1110 1111 static bool classof(const Type *T) { 1112 return T->getTypeClass() == RValueReference; 1113 } 1114 static bool classof(const RValueReferenceType *) { return true; } 1115}; 1116 1117/// MemberPointerType - C++ 8.3.3 - Pointers to members 1118/// 1119class MemberPointerType : public Type, public llvm::FoldingSetNode { 1120 QualType PointeeType; 1121 /// The class of which the pointee is a member. Must ultimately be a 1122 /// RecordType, but could be a typedef or a template parameter too. 1123 const Type *Class; 1124 1125 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 1126 Type(MemberPointer, CanonicalPtr, 1127 Cls->isDependentType() || Pointee->isDependentType()), 1128 PointeeType(Pointee), Class(Cls) { 1129 } 1130 friend class ASTContext; // ASTContext creates these. 1131public: 1132 1133 QualType getPointeeType() const { return PointeeType; } 1134 1135 const Type *getClass() const { return Class; } 1136 1137 virtual void getAsStringInternal(std::string &InnerString, 1138 const PrintingPolicy &Policy) const; 1139 1140 void Profile(llvm::FoldingSetNodeID &ID) { 1141 Profile(ID, getPointeeType(), getClass()); 1142 } 1143 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 1144 const Type *Class) { 1145 ID.AddPointer(Pointee.getAsOpaquePtr()); 1146 ID.AddPointer(Class); 1147 } 1148 1149 static bool classof(const Type *T) { 1150 return T->getTypeClass() == MemberPointer; 1151 } 1152 static bool classof(const MemberPointerType *) { return true; } 1153}; 1154 1155/// ArrayType - C99 6.7.5.2 - Array Declarators. 1156/// 1157class ArrayType : public Type, public llvm::FoldingSetNode { 1158public: 1159 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 1160 /// an array with a static size (e.g. int X[static 4]), or an array 1161 /// with a star size (e.g. int X[*]). 1162 /// 'static' is only allowed on function parameters. 1163 enum ArraySizeModifier { 1164 Normal, Static, Star 1165 }; 1166private: 1167 /// ElementType - The element type of the array. 1168 QualType ElementType; 1169 1170 // NOTE: VC++ treats enums as signed, avoid using the ArraySizeModifier enum 1171 /// NOTE: These fields are packed into the bitfields space in the Type class. 1172 unsigned SizeModifier : 2; 1173 1174 /// IndexTypeQuals - Capture qualifiers in declarations like: 1175 /// 'int X[static restrict 4]'. For function parameters only. 1176 unsigned IndexTypeQuals : 3; 1177 1178protected: 1179 // C++ [temp.dep.type]p1: 1180 // A type is dependent if it is... 1181 // - an array type constructed from any dependent type or whose 1182 // size is specified by a constant expression that is 1183 // value-dependent, 1184 ArrayType(TypeClass tc, QualType et, QualType can, 1185 ArraySizeModifier sm, unsigned tq) 1186 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray), 1187 ElementType(et), SizeModifier(sm), IndexTypeQuals(tq) {} 1188 1189 friend class ASTContext; // ASTContext creates these. 1190public: 1191 QualType getElementType() const { return ElementType; } 1192 ArraySizeModifier getSizeModifier() const { 1193 return ArraySizeModifier(SizeModifier); 1194 } 1195 Qualifiers getIndexTypeQualifiers() const { 1196 return Qualifiers::fromCVRMask(IndexTypeQuals); 1197 } 1198 unsigned getIndexTypeCVRQualifiers() const { return IndexTypeQuals; } 1199 1200 static bool classof(const Type *T) { 1201 return T->getTypeClass() == ConstantArray || 1202 T->getTypeClass() == ConstantArrayWithExpr || 1203 T->getTypeClass() == ConstantArrayWithoutExpr || 1204 T->getTypeClass() == VariableArray || 1205 T->getTypeClass() == IncompleteArray || 1206 T->getTypeClass() == DependentSizedArray; 1207 } 1208 static bool classof(const ArrayType *) { return true; } 1209}; 1210 1211/// ConstantArrayType - This class represents the canonical version of 1212/// C arrays with a specified constant size. For example, the canonical 1213/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 1214/// type is 'int' and the size is 404. 1215class ConstantArrayType : public ArrayType { 1216 llvm::APInt Size; // Allows us to unique the type. 1217 1218 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 1219 ArraySizeModifier sm, unsigned tq) 1220 : ArrayType(ConstantArray, et, can, sm, tq), 1221 Size(size) {} 1222protected: 1223 ConstantArrayType(TypeClass tc, QualType et, QualType can, 1224 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 1225 : ArrayType(tc, et, can, sm, tq), Size(size) {} 1226 friend class ASTContext; // ASTContext creates these. 1227public: 1228 const llvm::APInt &getSize() const { return Size; } 1229 virtual void getAsStringInternal(std::string &InnerString, 1230 const PrintingPolicy &Policy) const; 1231 1232 void Profile(llvm::FoldingSetNodeID &ID) { 1233 Profile(ID, getElementType(), getSize(), 1234 getSizeModifier(), getIndexTypeCVRQualifiers()); 1235 } 1236 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1237 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 1238 unsigned TypeQuals) { 1239 ID.AddPointer(ET.getAsOpaquePtr()); 1240 ID.AddInteger(ArraySize.getZExtValue()); 1241 ID.AddInteger(SizeMod); 1242 ID.AddInteger(TypeQuals); 1243 } 1244 static bool classof(const Type *T) { 1245 return T->getTypeClass() == ConstantArray || 1246 T->getTypeClass() == ConstantArrayWithExpr || 1247 T->getTypeClass() == ConstantArrayWithoutExpr; 1248 } 1249 static bool classof(const ConstantArrayType *) { return true; } 1250}; 1251 1252/// ConstantArrayWithExprType - This class represents C arrays with a 1253/// constant size specified by means of an integer constant expression. 1254/// For example 'int A[sizeof(int)]' has ConstantArrayWithExprType where 1255/// the element type is 'int' and the size expression is 'sizeof(int)'. 1256/// These types are non-canonical. 1257class ConstantArrayWithExprType : public ConstantArrayType { 1258 /// SizeExpr - The ICE occurring in the concrete syntax. 1259 Expr *SizeExpr; 1260 /// Brackets - The left and right array brackets. 1261 SourceRange Brackets; 1262 1263 ConstantArrayWithExprType(QualType et, QualType can, 1264 const llvm::APInt &size, Expr *e, 1265 ArraySizeModifier sm, unsigned tq, 1266 SourceRange brackets) 1267 : ConstantArrayType(ConstantArrayWithExpr, et, can, size, sm, tq), 1268 SizeExpr(e), Brackets(brackets) {} 1269 friend class ASTContext; // ASTContext creates these. 1270 virtual void Destroy(ASTContext& C); 1271 1272public: 1273 Expr *getSizeExpr() const { return SizeExpr; } 1274 SourceRange getBracketsRange() const { return Brackets; } 1275 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1276 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1277 1278 virtual void getAsStringInternal(std::string &InnerString, 1279 const PrintingPolicy &Policy) const; 1280 1281 static bool classof(const Type *T) { 1282 return T->getTypeClass() == ConstantArrayWithExpr; 1283 } 1284 static bool classof(const ConstantArrayWithExprType *) { return true; } 1285 1286 void Profile(llvm::FoldingSetNodeID &ID) { 1287 assert(0 && "Cannot unique ConstantArrayWithExprTypes."); 1288 } 1289}; 1290 1291/// ConstantArrayWithoutExprType - This class represents C arrays with a 1292/// constant size that was not specified by an integer constant expression, 1293/// but inferred by static semantics. 1294/// For example 'int A[] = { 0, 1, 2 }' has ConstantArrayWithoutExprType. 1295/// These types are non-canonical: the corresponding canonical type, 1296/// having the size specified in an APInt object, is a ConstantArrayType. 1297class ConstantArrayWithoutExprType : public ConstantArrayType { 1298 1299 ConstantArrayWithoutExprType(QualType et, QualType can, 1300 const llvm::APInt &size, 1301 ArraySizeModifier sm, unsigned tq) 1302 : ConstantArrayType(ConstantArrayWithoutExpr, et, can, size, sm, tq) {} 1303 friend class ASTContext; // ASTContext creates these. 1304 1305public: 1306 virtual void getAsStringInternal(std::string &InnerString, 1307 const PrintingPolicy &Policy) const; 1308 1309 static bool classof(const Type *T) { 1310 return T->getTypeClass() == ConstantArrayWithoutExpr; 1311 } 1312 static bool classof(const ConstantArrayWithoutExprType *) { return true; } 1313 1314 void Profile(llvm::FoldingSetNodeID &ID) { 1315 assert(0 && "Cannot unique ConstantArrayWithoutExprTypes."); 1316 } 1317}; 1318 1319/// IncompleteArrayType - This class represents C arrays with an unspecified 1320/// size. For example 'int A[]' has an IncompleteArrayType where the element 1321/// type is 'int' and the size is unspecified. 1322class IncompleteArrayType : public ArrayType { 1323 1324 IncompleteArrayType(QualType et, QualType can, 1325 ArraySizeModifier sm, unsigned tq) 1326 : ArrayType(IncompleteArray, et, can, sm, tq) {} 1327 friend class ASTContext; // ASTContext creates these. 1328public: 1329 virtual void getAsStringInternal(std::string &InnerString, 1330 const PrintingPolicy &Policy) const; 1331 1332 static bool classof(const Type *T) { 1333 return T->getTypeClass() == IncompleteArray; 1334 } 1335 static bool classof(const IncompleteArrayType *) { return true; } 1336 1337 friend class StmtIteratorBase; 1338 1339 void Profile(llvm::FoldingSetNodeID &ID) { 1340 Profile(ID, getElementType(), getSizeModifier(), 1341 getIndexTypeCVRQualifiers()); 1342 } 1343 1344 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1345 ArraySizeModifier SizeMod, unsigned TypeQuals) { 1346 ID.AddPointer(ET.getAsOpaquePtr()); 1347 ID.AddInteger(SizeMod); 1348 ID.AddInteger(TypeQuals); 1349 } 1350}; 1351 1352/// VariableArrayType - This class represents C arrays with a specified size 1353/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 1354/// Since the size expression is an arbitrary expression, we store it as such. 1355/// 1356/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 1357/// should not be: two lexically equivalent variable array types could mean 1358/// different things, for example, these variables do not have the same type 1359/// dynamically: 1360/// 1361/// void foo(int x) { 1362/// int Y[x]; 1363/// ++x; 1364/// int Z[x]; 1365/// } 1366/// 1367class VariableArrayType : public ArrayType { 1368 /// SizeExpr - An assignment expression. VLA's are only permitted within 1369 /// a function block. 1370 Stmt *SizeExpr; 1371 /// Brackets - The left and right array brackets. 1372 SourceRange Brackets; 1373 1374 VariableArrayType(QualType et, QualType can, Expr *e, 1375 ArraySizeModifier sm, unsigned tq, 1376 SourceRange brackets) 1377 : ArrayType(VariableArray, et, can, sm, tq), 1378 SizeExpr((Stmt*) e), Brackets(brackets) {} 1379 friend class ASTContext; // ASTContext creates these. 1380 virtual void Destroy(ASTContext& C); 1381 1382public: 1383 Expr *getSizeExpr() const { 1384 // We use C-style casts instead of cast<> here because we do not wish 1385 // to have a dependency of Type.h on Stmt.h/Expr.h. 1386 return (Expr*) SizeExpr; 1387 } 1388 SourceRange getBracketsRange() const { return Brackets; } 1389 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1390 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1391 1392 virtual void getAsStringInternal(std::string &InnerString, 1393 const PrintingPolicy &Policy) const; 1394 1395 static bool classof(const Type *T) { 1396 return T->getTypeClass() == VariableArray; 1397 } 1398 static bool classof(const VariableArrayType *) { return true; } 1399 1400 friend class StmtIteratorBase; 1401 1402 void Profile(llvm::FoldingSetNodeID &ID) { 1403 assert(0 && "Cannnot unique VariableArrayTypes."); 1404 } 1405}; 1406 1407/// DependentSizedArrayType - This type represents an array type in 1408/// C++ whose size is a value-dependent expression. For example: 1409/// @code 1410/// template<typename T, int Size> 1411/// class array { 1412/// T data[Size]; 1413/// }; 1414/// @endcode 1415/// For these types, we won't actually know what the array bound is 1416/// until template instantiation occurs, at which point this will 1417/// become either a ConstantArrayType or a VariableArrayType. 1418class DependentSizedArrayType : public ArrayType { 1419 ASTContext &Context; 1420 1421 /// SizeExpr - An assignment expression that will instantiate to the 1422 /// size of the array. 1423 Stmt *SizeExpr; 1424 /// Brackets - The left and right array brackets. 1425 SourceRange Brackets; 1426 1427 DependentSizedArrayType(ASTContext &Context, QualType et, QualType can, 1428 Expr *e, ArraySizeModifier sm, unsigned tq, 1429 SourceRange brackets) 1430 : ArrayType(DependentSizedArray, et, can, sm, tq), 1431 Context(Context), SizeExpr((Stmt*) e), Brackets(brackets) {} 1432 friend class ASTContext; // ASTContext creates these. 1433 virtual void Destroy(ASTContext& C); 1434 1435public: 1436 Expr *getSizeExpr() const { 1437 // We use C-style casts instead of cast<> here because we do not wish 1438 // to have a dependency of Type.h on Stmt.h/Expr.h. 1439 return (Expr*) SizeExpr; 1440 } 1441 SourceRange getBracketsRange() const { return Brackets; } 1442 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1443 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1444 1445 virtual void getAsStringInternal(std::string &InnerString, 1446 const PrintingPolicy &Policy) const; 1447 1448 static bool classof(const Type *T) { 1449 return T->getTypeClass() == DependentSizedArray; 1450 } 1451 static bool classof(const DependentSizedArrayType *) { return true; } 1452 1453 friend class StmtIteratorBase; 1454 1455 1456 void Profile(llvm::FoldingSetNodeID &ID) { 1457 Profile(ID, Context, getElementType(), 1458 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 1459 } 1460 1461 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1462 QualType ET, ArraySizeModifier SizeMod, 1463 unsigned TypeQuals, Expr *E); 1464}; 1465 1466/// DependentSizedExtVectorType - This type represent an extended vector type 1467/// where either the type or size is dependent. For example: 1468/// @code 1469/// template<typename T, int Size> 1470/// class vector { 1471/// typedef T __attribute__((ext_vector_type(Size))) type; 1472/// } 1473/// @endcode 1474class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 1475 ASTContext &Context; 1476 Expr *SizeExpr; 1477 /// ElementType - The element type of the array. 1478 QualType ElementType; 1479 SourceLocation loc; 1480 1481 DependentSizedExtVectorType(ASTContext &Context, QualType ElementType, 1482 QualType can, Expr *SizeExpr, SourceLocation loc) 1483 : Type (DependentSizedExtVector, can, true), 1484 Context(Context), SizeExpr(SizeExpr), ElementType(ElementType), 1485 loc(loc) {} 1486 friend class ASTContext; 1487 virtual void Destroy(ASTContext& C); 1488 1489public: 1490 Expr *getSizeExpr() const { return SizeExpr; } 1491 QualType getElementType() const { return ElementType; } 1492 SourceLocation getAttributeLoc() const { return loc; } 1493 1494 virtual void getAsStringInternal(std::string &InnerString, 1495 const PrintingPolicy &Policy) const; 1496 1497 static bool classof(const Type *T) { 1498 return T->getTypeClass() == DependentSizedExtVector; 1499 } 1500 static bool classof(const DependentSizedExtVectorType *) { return true; } 1501 1502 void Profile(llvm::FoldingSetNodeID &ID) { 1503 Profile(ID, Context, getElementType(), getSizeExpr()); 1504 } 1505 1506 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1507 QualType ElementType, Expr *SizeExpr); 1508}; 1509 1510 1511/// VectorType - GCC generic vector type. This type is created using 1512/// __attribute__((vector_size(n)), where "n" specifies the vector size in 1513/// bytes. Since the constructor takes the number of vector elements, the 1514/// client is responsible for converting the size into the number of elements. 1515class VectorType : public Type, public llvm::FoldingSetNode { 1516protected: 1517 /// ElementType - The element type of the vector. 1518 QualType ElementType; 1519 1520 /// NumElements - The number of elements in the vector. 1521 unsigned NumElements; 1522 1523 VectorType(QualType vecType, unsigned nElements, QualType canonType) : 1524 Type(Vector, canonType, vecType->isDependentType()), 1525 ElementType(vecType), NumElements(nElements) {} 1526 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 1527 QualType canonType) 1528 : Type(tc, canonType, vecType->isDependentType()), ElementType(vecType), 1529 NumElements(nElements) {} 1530 friend class ASTContext; // ASTContext creates these. 1531public: 1532 1533 QualType getElementType() const { return ElementType; } 1534 unsigned getNumElements() const { return NumElements; } 1535 1536 virtual void getAsStringInternal(std::string &InnerString, 1537 const PrintingPolicy &Policy) const; 1538 1539 void Profile(llvm::FoldingSetNodeID &ID) { 1540 Profile(ID, getElementType(), getNumElements(), getTypeClass()); 1541 } 1542 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 1543 unsigned NumElements, TypeClass TypeClass) { 1544 ID.AddPointer(ElementType.getAsOpaquePtr()); 1545 ID.AddInteger(NumElements); 1546 ID.AddInteger(TypeClass); 1547 } 1548 static bool classof(const Type *T) { 1549 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 1550 } 1551 static bool classof(const VectorType *) { return true; } 1552}; 1553 1554/// ExtVectorType - Extended vector type. This type is created using 1555/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 1556/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 1557/// class enables syntactic extensions, like Vector Components for accessing 1558/// points, colors, and textures (modeled after OpenGL Shading Language). 1559class ExtVectorType : public VectorType { 1560 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 1561 VectorType(ExtVector, vecType, nElements, canonType) {} 1562 friend class ASTContext; // ASTContext creates these. 1563public: 1564 static int getPointAccessorIdx(char c) { 1565 switch (c) { 1566 default: return -1; 1567 case 'x': return 0; 1568 case 'y': return 1; 1569 case 'z': return 2; 1570 case 'w': return 3; 1571 } 1572 } 1573 static int getNumericAccessorIdx(char c) { 1574 switch (c) { 1575 default: return -1; 1576 case '0': return 0; 1577 case '1': return 1; 1578 case '2': return 2; 1579 case '3': return 3; 1580 case '4': return 4; 1581 case '5': return 5; 1582 case '6': return 6; 1583 case '7': return 7; 1584 case '8': return 8; 1585 case '9': return 9; 1586 case 'A': 1587 case 'a': return 10; 1588 case 'B': 1589 case 'b': return 11; 1590 case 'C': 1591 case 'c': return 12; 1592 case 'D': 1593 case 'd': return 13; 1594 case 'E': 1595 case 'e': return 14; 1596 case 'F': 1597 case 'f': return 15; 1598 } 1599 } 1600 1601 static int getAccessorIdx(char c) { 1602 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 1603 return getNumericAccessorIdx(c); 1604 } 1605 1606 bool isAccessorWithinNumElements(char c) const { 1607 if (int idx = getAccessorIdx(c)+1) 1608 return unsigned(idx-1) < NumElements; 1609 return false; 1610 } 1611 virtual void getAsStringInternal(std::string &InnerString, 1612 const PrintingPolicy &Policy) const; 1613 1614 static bool classof(const Type *T) { 1615 return T->getTypeClass() == ExtVector; 1616 } 1617 static bool classof(const ExtVectorType *) { return true; } 1618}; 1619 1620/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 1621/// class of FunctionNoProtoType and FunctionProtoType. 1622/// 1623class FunctionType : public Type { 1624 /// SubClassData - This field is owned by the subclass, put here to pack 1625 /// tightly with the ivars in Type. 1626 bool SubClassData : 1; 1627 1628 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1629 /// other bitfields. 1630 /// The qualifiers are part of FunctionProtoType because... 1631 /// 1632 /// C++ 8.3.5p4: The return type, the parameter type list and the 1633 /// cv-qualifier-seq, [...], are part of the function type. 1634 /// 1635 unsigned TypeQuals : 3; 1636 1637 /// NoReturn - Indicates if the function type is attribute noreturn. 1638 unsigned NoReturn : 1; 1639 1640 // The type returned by the function. 1641 QualType ResultType; 1642protected: 1643 FunctionType(TypeClass tc, QualType res, bool SubclassInfo, 1644 unsigned typeQuals, QualType Canonical, bool Dependent, 1645 bool noReturn = false) 1646 : Type(tc, Canonical, Dependent), 1647 SubClassData(SubclassInfo), TypeQuals(typeQuals), NoReturn(noReturn), 1648 ResultType(res) {} 1649 bool getSubClassData() const { return SubClassData; } 1650 unsigned getTypeQuals() const { return TypeQuals; } 1651public: 1652 1653 QualType getResultType() const { return ResultType; } 1654 bool getNoReturnAttr() const { return NoReturn; } 1655 1656 1657 static bool classof(const Type *T) { 1658 return T->getTypeClass() == FunctionNoProto || 1659 T->getTypeClass() == FunctionProto; 1660 } 1661 static bool classof(const FunctionType *) { return true; } 1662}; 1663 1664/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 1665/// no information available about its arguments. 1666class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 1667 FunctionNoProtoType(QualType Result, QualType Canonical, 1668 bool NoReturn = false) 1669 : FunctionType(FunctionNoProto, Result, false, 0, Canonical, 1670 /*Dependent=*/false, NoReturn) {} 1671 friend class ASTContext; // ASTContext creates these. 1672public: 1673 // No additional state past what FunctionType provides. 1674 1675 virtual void getAsStringInternal(std::string &InnerString, 1676 const PrintingPolicy &Policy) const; 1677 1678 void Profile(llvm::FoldingSetNodeID &ID) { 1679 Profile(ID, getResultType(), getNoReturnAttr()); 1680 } 1681 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 1682 bool NoReturn) { 1683 ID.AddInteger(NoReturn); 1684 ID.AddPointer(ResultType.getAsOpaquePtr()); 1685 } 1686 1687 static bool classof(const Type *T) { 1688 return T->getTypeClass() == FunctionNoProto; 1689 } 1690 static bool classof(const FunctionNoProtoType *) { return true; } 1691}; 1692 1693/// FunctionProtoType - Represents a prototype with argument type info, e.g. 1694/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 1695/// arguments, not as having a single void argument. Such a type can have an 1696/// exception specification, but this specification is not part of the canonical 1697/// type. 1698class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 1699 /// hasAnyDependentType - Determine whether there are any dependent 1700 /// types within the arguments passed in. 1701 static bool hasAnyDependentType(const QualType *ArgArray, unsigned numArgs) { 1702 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 1703 if (ArgArray[Idx]->isDependentType()) 1704 return true; 1705 1706 return false; 1707 } 1708 1709 FunctionProtoType(QualType Result, const QualType *ArgArray, unsigned numArgs, 1710 bool isVariadic, unsigned typeQuals, bool hasExs, 1711 bool hasAnyExs, const QualType *ExArray, 1712 unsigned numExs, QualType Canonical, bool NoReturn) 1713 : FunctionType(FunctionProto, Result, isVariadic, typeQuals, Canonical, 1714 (Result->isDependentType() || 1715 hasAnyDependentType(ArgArray, numArgs)), NoReturn), 1716 NumArgs(numArgs), NumExceptions(numExs), HasExceptionSpec(hasExs), 1717 AnyExceptionSpec(hasAnyExs) { 1718 // Fill in the trailing argument array. 1719 QualType *ArgInfo = reinterpret_cast<QualType*>(this+1); 1720 for (unsigned i = 0; i != numArgs; ++i) 1721 ArgInfo[i] = ArgArray[i]; 1722 // Fill in the exception array. 1723 QualType *Ex = ArgInfo + numArgs; 1724 for (unsigned i = 0; i != numExs; ++i) 1725 Ex[i] = ExArray[i]; 1726 } 1727 1728 /// NumArgs - The number of arguments this function has, not counting '...'. 1729 unsigned NumArgs : 20; 1730 1731 /// NumExceptions - The number of types in the exception spec, if any. 1732 unsigned NumExceptions : 10; 1733 1734 /// HasExceptionSpec - Whether this function has an exception spec at all. 1735 bool HasExceptionSpec : 1; 1736 1737 /// AnyExceptionSpec - Whether this function has a throw(...) spec. 1738 bool AnyExceptionSpec : 1; 1739 1740 /// ArgInfo - There is an variable size array after the class in memory that 1741 /// holds the argument types. 1742 1743 /// Exceptions - There is another variable size array after ArgInfo that 1744 /// holds the exception types. 1745 1746 friend class ASTContext; // ASTContext creates these. 1747 1748public: 1749 unsigned getNumArgs() const { return NumArgs; } 1750 QualType getArgType(unsigned i) const { 1751 assert(i < NumArgs && "Invalid argument number!"); 1752 return arg_type_begin()[i]; 1753 } 1754 1755 bool hasExceptionSpec() const { return HasExceptionSpec; } 1756 bool hasAnyExceptionSpec() const { return AnyExceptionSpec; } 1757 unsigned getNumExceptions() const { return NumExceptions; } 1758 QualType getExceptionType(unsigned i) const { 1759 assert(i < NumExceptions && "Invalid exception number!"); 1760 return exception_begin()[i]; 1761 } 1762 bool hasEmptyExceptionSpec() const { 1763 return hasExceptionSpec() && !hasAnyExceptionSpec() && 1764 getNumExceptions() == 0; 1765 } 1766 1767 bool isVariadic() const { return getSubClassData(); } 1768 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 1769 1770 typedef const QualType *arg_type_iterator; 1771 arg_type_iterator arg_type_begin() const { 1772 return reinterpret_cast<const QualType *>(this+1); 1773 } 1774 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 1775 1776 typedef const QualType *exception_iterator; 1777 exception_iterator exception_begin() const { 1778 // exceptions begin where arguments end 1779 return arg_type_end(); 1780 } 1781 exception_iterator exception_end() const { 1782 return exception_begin() + NumExceptions; 1783 } 1784 1785 virtual void getAsStringInternal(std::string &InnerString, 1786 const PrintingPolicy &Policy) const; 1787 1788 static bool classof(const Type *T) { 1789 return T->getTypeClass() == FunctionProto; 1790 } 1791 static bool classof(const FunctionProtoType *) { return true; } 1792 1793 void Profile(llvm::FoldingSetNodeID &ID); 1794 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 1795 arg_type_iterator ArgTys, unsigned NumArgs, 1796 bool isVariadic, unsigned TypeQuals, 1797 bool hasExceptionSpec, bool anyExceptionSpec, 1798 unsigned NumExceptions, exception_iterator Exs, 1799 bool NoReturn); 1800}; 1801 1802 1803class TypedefType : public Type { 1804 TypedefDecl *Decl; 1805protected: 1806 TypedefType(TypeClass tc, TypedefDecl *D, QualType can) 1807 : Type(tc, can, can->isDependentType()), Decl(D) { 1808 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1809 } 1810 friend class ASTContext; // ASTContext creates these. 1811public: 1812 1813 TypedefDecl *getDecl() const { return Decl; } 1814 1815 /// LookThroughTypedefs - Return the ultimate type this typedef corresponds to 1816 /// potentially looking through *all* consecutive typedefs. This returns the 1817 /// sum of the type qualifiers, so if you have: 1818 /// typedef const int A; 1819 /// typedef volatile A B; 1820 /// looking through the typedefs for B will give you "const volatile A". 1821 QualType LookThroughTypedefs() const; 1822 1823 virtual void getAsStringInternal(std::string &InnerString, 1824 const PrintingPolicy &Policy) const; 1825 1826 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 1827 static bool classof(const TypedefType *) { return true; } 1828}; 1829 1830/// TypeOfExprType (GCC extension). 1831class TypeOfExprType : public Type { 1832 Expr *TOExpr; 1833 1834protected: 1835 TypeOfExprType(Expr *E, QualType can = QualType()); 1836 friend class ASTContext; // ASTContext creates these. 1837public: 1838 Expr *getUnderlyingExpr() const { return TOExpr; } 1839 1840 virtual void getAsStringInternal(std::string &InnerString, 1841 const PrintingPolicy &Policy) const; 1842 1843 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 1844 static bool classof(const TypeOfExprType *) { return true; } 1845}; 1846 1847/// Subclass of TypeOfExprType that is used for canonical, dependent 1848/// typeof(expr) types. 1849class DependentTypeOfExprType 1850 : public TypeOfExprType, public llvm::FoldingSetNode { 1851 ASTContext &Context; 1852 1853public: 1854 DependentTypeOfExprType(ASTContext &Context, Expr *E) 1855 : TypeOfExprType(E), Context(Context) { } 1856 1857 void Profile(llvm::FoldingSetNodeID &ID) { 1858 Profile(ID, Context, getUnderlyingExpr()); 1859 } 1860 1861 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1862 Expr *E); 1863}; 1864 1865/// TypeOfType (GCC extension). 1866class TypeOfType : public Type { 1867 QualType TOType; 1868 TypeOfType(QualType T, QualType can) 1869 : Type(TypeOf, can, T->isDependentType()), TOType(T) { 1870 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1871 } 1872 friend class ASTContext; // ASTContext creates these. 1873public: 1874 QualType getUnderlyingType() const { return TOType; } 1875 1876 virtual void getAsStringInternal(std::string &InnerString, 1877 const PrintingPolicy &Policy) const; 1878 1879 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 1880 static bool classof(const TypeOfType *) { return true; } 1881}; 1882 1883/// DecltypeType (C++0x) 1884class DecltypeType : public Type { 1885 Expr *E; 1886 1887 // FIXME: We could get rid of UnderlyingType if we wanted to: We would have to 1888 // Move getDesugaredType to ASTContext so that it can call getDecltypeForExpr 1889 // from it. 1890 QualType UnderlyingType; 1891 1892protected: 1893 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 1894 friend class ASTContext; // ASTContext creates these. 1895public: 1896 Expr *getUnderlyingExpr() const { return E; } 1897 QualType getUnderlyingType() const { return UnderlyingType; } 1898 1899 virtual void getAsStringInternal(std::string &InnerString, 1900 const PrintingPolicy &Policy) const; 1901 1902 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 1903 static bool classof(const DecltypeType *) { return true; } 1904}; 1905 1906/// Subclass of DecltypeType that is used for canonical, dependent 1907/// C++0x decltype types. 1908class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 1909 ASTContext &Context; 1910 1911public: 1912 DependentDecltypeType(ASTContext &Context, Expr *E); 1913 1914 void Profile(llvm::FoldingSetNodeID &ID) { 1915 Profile(ID, Context, getUnderlyingExpr()); 1916 } 1917 1918 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1919 Expr *E); 1920}; 1921 1922class TagType : public Type { 1923 /// Stores the TagDecl associated with this type. The decl will 1924 /// point to the TagDecl that actually defines the entity (or is a 1925 /// definition in progress), if there is such a definition. The 1926 /// single-bit value will be non-zero when this tag is in the 1927 /// process of being defined. 1928 mutable llvm::PointerIntPair<TagDecl *, 1> decl; 1929 friend class ASTContext; 1930 friend class TagDecl; 1931 1932protected: 1933 TagType(TypeClass TC, TagDecl *D, QualType can); 1934 1935public: 1936 TagDecl *getDecl() const { return decl.getPointer(); } 1937 1938 /// @brief Determines whether this type is in the process of being 1939 /// defined. 1940 bool isBeingDefined() const { return decl.getInt(); } 1941 void setBeingDefined(bool Def) const { decl.setInt(Def? 1 : 0); } 1942 1943 virtual void getAsStringInternal(std::string &InnerString, 1944 const PrintingPolicy &Policy) const; 1945 1946 static bool classof(const Type *T) { 1947 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 1948 } 1949 static bool classof(const TagType *) { return true; } 1950 static bool classof(const RecordType *) { return true; } 1951 static bool classof(const EnumType *) { return true; } 1952}; 1953 1954/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 1955/// to detect TagType objects of structs/unions/classes. 1956class RecordType : public TagType { 1957protected: 1958 explicit RecordType(RecordDecl *D) 1959 : TagType(Record, reinterpret_cast<TagDecl*>(D), QualType()) { } 1960 explicit RecordType(TypeClass TC, RecordDecl *D) 1961 : TagType(TC, reinterpret_cast<TagDecl*>(D), QualType()) { } 1962 friend class ASTContext; // ASTContext creates these. 1963public: 1964 1965 RecordDecl *getDecl() const { 1966 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 1967 } 1968 1969 // FIXME: This predicate is a helper to QualType/Type. It needs to 1970 // recursively check all fields for const-ness. If any field is declared 1971 // const, it needs to return false. 1972 bool hasConstFields() const { return false; } 1973 1974 // FIXME: RecordType needs to check when it is created that all fields are in 1975 // the same address space, and return that. 1976 unsigned getAddressSpace() const { return 0; } 1977 1978 static bool classof(const TagType *T); 1979 static bool classof(const Type *T) { 1980 return isa<TagType>(T) && classof(cast<TagType>(T)); 1981 } 1982 static bool classof(const RecordType *) { return true; } 1983}; 1984 1985/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 1986/// to detect TagType objects of enums. 1987class EnumType : public TagType { 1988 explicit EnumType(EnumDecl *D) 1989 : TagType(Enum, reinterpret_cast<TagDecl*>(D), QualType()) { } 1990 friend class ASTContext; // ASTContext creates these. 1991public: 1992 1993 EnumDecl *getDecl() const { 1994 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 1995 } 1996 1997 static bool classof(const TagType *T); 1998 static bool classof(const Type *T) { 1999 return isa<TagType>(T) && classof(cast<TagType>(T)); 2000 } 2001 static bool classof(const EnumType *) { return true; } 2002}; 2003 2004/// ElaboratedType - A non-canonical type used to represents uses of 2005/// elaborated type specifiers in C++. For example: 2006/// 2007/// void foo(union MyUnion); 2008/// ^^^^^^^^^^^^^ 2009/// 2010/// At the moment, for efficiency we do not create elaborated types in 2011/// C, since outside of typedefs all references to structs would 2012/// necessarily be elaborated. 2013class ElaboratedType : public Type, public llvm::FoldingSetNode { 2014public: 2015 enum TagKind { 2016 TK_struct, 2017 TK_union, 2018 TK_class, 2019 TK_enum 2020 }; 2021 2022private: 2023 /// The tag that was used in this elaborated type specifier. 2024 TagKind Tag; 2025 2026 /// The underlying type. 2027 QualType UnderlyingType; 2028 2029 explicit ElaboratedType(QualType Ty, TagKind Tag, QualType Canon) 2030 : Type(Elaborated, Canon, Canon->isDependentType()), 2031 Tag(Tag), UnderlyingType(Ty) { } 2032 friend class ASTContext; // ASTContext creates these. 2033 2034public: 2035 TagKind getTagKind() const { return Tag; } 2036 QualType getUnderlyingType() const { return UnderlyingType; } 2037 2038 static const char *getNameForTagKind(TagKind Kind) { 2039 switch (Kind) { 2040 default: assert(0 && "Unknown TagKind!"); 2041 case TK_struct: return "struct"; 2042 case TK_union: return "union"; 2043 case TK_class: return "class"; 2044 case TK_enum: return "enum"; 2045 } 2046 } 2047 2048 virtual void getAsStringInternal(std::string &InnerString, 2049 const PrintingPolicy &Policy) const; 2050 2051 void Profile(llvm::FoldingSetNodeID &ID) { 2052 Profile(ID, getUnderlyingType(), getTagKind()); 2053 } 2054 static void Profile(llvm::FoldingSetNodeID &ID, QualType T, TagKind Tag) { 2055 ID.AddPointer(T.getAsOpaquePtr()); 2056 ID.AddInteger(Tag); 2057 } 2058 2059 static bool classof(const ElaboratedType*) { return true; } 2060 static bool classof(const Type *T) { return T->getTypeClass() == Elaborated; } 2061}; 2062 2063class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2064 unsigned Depth : 15; 2065 unsigned Index : 16; 2066 unsigned ParameterPack : 1; 2067 IdentifierInfo *Name; 2068 2069 TemplateTypeParmType(unsigned D, unsigned I, bool PP, IdentifierInfo *N, 2070 QualType Canon) 2071 : Type(TemplateTypeParm, Canon, /*Dependent=*/true), 2072 Depth(D), Index(I), ParameterPack(PP), Name(N) { } 2073 2074 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 2075 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true), 2076 Depth(D), Index(I), ParameterPack(PP), Name(0) { } 2077 2078 friend class ASTContext; // ASTContext creates these 2079 2080public: 2081 unsigned getDepth() const { return Depth; } 2082 unsigned getIndex() const { return Index; } 2083 bool isParameterPack() const { return ParameterPack; } 2084 IdentifierInfo *getName() const { return Name; } 2085 2086 virtual void getAsStringInternal(std::string &InnerString, 2087 const PrintingPolicy &Policy) const; 2088 2089 void Profile(llvm::FoldingSetNodeID &ID) { 2090 Profile(ID, Depth, Index, ParameterPack, Name); 2091 } 2092 2093 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 2094 unsigned Index, bool ParameterPack, 2095 IdentifierInfo *Name) { 2096 ID.AddInteger(Depth); 2097 ID.AddInteger(Index); 2098 ID.AddBoolean(ParameterPack); 2099 ID.AddPointer(Name); 2100 } 2101 2102 static bool classof(const Type *T) { 2103 return T->getTypeClass() == TemplateTypeParm; 2104 } 2105 static bool classof(const TemplateTypeParmType *T) { return true; } 2106}; 2107 2108/// \brief Represents the type of a template specialization as written 2109/// in the source code. 2110/// 2111/// Template specialization types represent the syntactic form of a 2112/// template-id that refers to a type, e.g., @c vector<int>. Some 2113/// template specialization types are syntactic sugar, whose canonical 2114/// type will point to some other type node that represents the 2115/// instantiation or class template specialization. For example, a 2116/// class template specialization type of @c vector<int> will refer to 2117/// a tag type for the instantiation 2118/// @c std::vector<int, std::allocator<int>>. 2119/// 2120/// Other template specialization types, for which the template name 2121/// is dependent, may be canonical types. These types are always 2122/// dependent. 2123class TemplateSpecializationType 2124 : public Type, public llvm::FoldingSetNode { 2125 2126 // FIXME: Currently needed for profiling expressions; can we avoid this? 2127 ASTContext &Context; 2128 2129 /// \brief The name of the template being specialized. 2130 TemplateName Template; 2131 2132 /// \brief - The number of template arguments named in this class 2133 /// template specialization. 2134 unsigned NumArgs; 2135 2136 TemplateSpecializationType(ASTContext &Context, 2137 TemplateName T, 2138 const TemplateArgument *Args, 2139 unsigned NumArgs, QualType Canon); 2140 2141 virtual void Destroy(ASTContext& C); 2142 2143 friend class ASTContext; // ASTContext creates these 2144 2145public: 2146 /// \brief Determine whether any of the given template arguments are 2147 /// dependent. 2148 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 2149 unsigned NumArgs); 2150 2151 /// \brief Print a template argument list, including the '<' and '>' 2152 /// enclosing the template arguments. 2153 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 2154 unsigned NumArgs, 2155 const PrintingPolicy &Policy); 2156 2157 typedef const TemplateArgument * iterator; 2158 2159 iterator begin() const { return getArgs(); } 2160 iterator end() const; 2161 2162 /// \brief Retrieve the name of the template that we are specializing. 2163 TemplateName getTemplateName() const { return Template; } 2164 2165 /// \brief Retrieve the template arguments. 2166 const TemplateArgument *getArgs() const { 2167 return reinterpret_cast<const TemplateArgument *>(this + 1); 2168 } 2169 2170 /// \brief Retrieve the number of template arguments. 2171 unsigned getNumArgs() const { return NumArgs; } 2172 2173 /// \brief Retrieve a specific template argument as a type. 2174 /// \precondition @c isArgType(Arg) 2175 const TemplateArgument &getArg(unsigned Idx) const; 2176 2177 virtual void getAsStringInternal(std::string &InnerString, 2178 const PrintingPolicy &Policy) const; 2179 2180 void Profile(llvm::FoldingSetNodeID &ID) { 2181 Profile(ID, Template, getArgs(), NumArgs, Context); 2182 } 2183 2184 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 2185 const TemplateArgument *Args, unsigned NumArgs, 2186 ASTContext &Context); 2187 2188 static bool classof(const Type *T) { 2189 return T->getTypeClass() == TemplateSpecialization; 2190 } 2191 static bool classof(const TemplateSpecializationType *T) { return true; } 2192}; 2193 2194/// \brief Represents a type that was referred to via a qualified 2195/// name, e.g., N::M::type. 2196/// 2197/// This type is used to keep track of a type name as written in the 2198/// source code, including any nested-name-specifiers. The type itself 2199/// is always "sugar", used to express what was written in the source 2200/// code but containing no additional semantic information. 2201class QualifiedNameType : public Type, public llvm::FoldingSetNode { 2202 /// \brief The nested name specifier containing the qualifier. 2203 NestedNameSpecifier *NNS; 2204 2205 /// \brief The type that this qualified name refers to. 2206 QualType NamedType; 2207 2208 QualifiedNameType(NestedNameSpecifier *NNS, QualType NamedType, 2209 QualType CanonType) 2210 : Type(QualifiedName, CanonType, NamedType->isDependentType()), 2211 NNS(NNS), NamedType(NamedType) { } 2212 2213 friend class ASTContext; // ASTContext creates these 2214 2215public: 2216 /// \brief Retrieve the qualification on this type. 2217 NestedNameSpecifier *getQualifier() const { return NNS; } 2218 2219 /// \brief Retrieve the type named by the qualified-id. 2220 QualType getNamedType() const { return NamedType; } 2221 2222 virtual void getAsStringInternal(std::string &InnerString, 2223 const PrintingPolicy &Policy) const; 2224 2225 void Profile(llvm::FoldingSetNodeID &ID) { 2226 Profile(ID, NNS, NamedType); 2227 } 2228 2229 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 2230 QualType NamedType) { 2231 ID.AddPointer(NNS); 2232 NamedType.Profile(ID); 2233 } 2234 2235 static bool classof(const Type *T) { 2236 return T->getTypeClass() == QualifiedName; 2237 } 2238 static bool classof(const QualifiedNameType *T) { return true; } 2239}; 2240 2241/// \brief Represents a 'typename' specifier that names a type within 2242/// a dependent type, e.g., "typename T::type". 2243/// 2244/// TypenameType has a very similar structure to QualifiedNameType, 2245/// which also involves a nested-name-specifier following by a type, 2246/// and (FIXME!) both can even be prefixed by the 'typename' 2247/// keyword. However, the two types serve very different roles: 2248/// QualifiedNameType is a non-semantic type that serves only as sugar 2249/// to show how a particular type was written in the source 2250/// code. TypenameType, on the other hand, only occurs when the 2251/// nested-name-specifier is dependent, such that we cannot resolve 2252/// the actual type until after instantiation. 2253class TypenameType : public Type, public llvm::FoldingSetNode { 2254 /// \brief The nested name specifier containing the qualifier. 2255 NestedNameSpecifier *NNS; 2256 2257 typedef llvm::PointerUnion<const IdentifierInfo *, 2258 const TemplateSpecializationType *> NameType; 2259 2260 /// \brief The type that this typename specifier refers to. 2261 NameType Name; 2262 2263 TypenameType(NestedNameSpecifier *NNS, const IdentifierInfo *Name, 2264 QualType CanonType) 2265 : Type(Typename, CanonType, true), NNS(NNS), Name(Name) { 2266 assert(NNS->isDependent() && 2267 "TypenameType requires a dependent nested-name-specifier"); 2268 } 2269 2270 TypenameType(NestedNameSpecifier *NNS, const TemplateSpecializationType *Ty, 2271 QualType CanonType) 2272 : Type(Typename, CanonType, true), NNS(NNS), Name(Ty) { 2273 assert(NNS->isDependent() && 2274 "TypenameType requires a dependent nested-name-specifier"); 2275 } 2276 2277 friend class ASTContext; // ASTContext creates these 2278 2279public: 2280 /// \brief Retrieve the qualification on this type. 2281 NestedNameSpecifier *getQualifier() const { return NNS; } 2282 2283 /// \brief Retrieve the type named by the typename specifier as an 2284 /// identifier. 2285 /// 2286 /// This routine will return a non-NULL identifier pointer when the 2287 /// form of the original typename was terminated by an identifier, 2288 /// e.g., "typename T::type". 2289 const IdentifierInfo *getIdentifier() const { 2290 return Name.dyn_cast<const IdentifierInfo *>(); 2291 } 2292 2293 /// \brief Retrieve the type named by the typename specifier as a 2294 /// type specialization. 2295 const TemplateSpecializationType *getTemplateId() const { 2296 return Name.dyn_cast<const TemplateSpecializationType *>(); 2297 } 2298 2299 virtual void getAsStringInternal(std::string &InnerString, 2300 const PrintingPolicy &Policy) const; 2301 2302 void Profile(llvm::FoldingSetNodeID &ID) { 2303 Profile(ID, NNS, Name); 2304 } 2305 2306 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 2307 NameType Name) { 2308 ID.AddPointer(NNS); 2309 ID.AddPointer(Name.getOpaqueValue()); 2310 } 2311 2312 static bool classof(const Type *T) { 2313 return T->getTypeClass() == Typename; 2314 } 2315 static bool classof(const TypenameType *T) { return true; } 2316}; 2317 2318/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 2319/// object oriented design. They basically correspond to C++ classes. There 2320/// are two kinds of interface types, normal interfaces like "NSString" and 2321/// qualified interfaces, which are qualified with a protocol list like 2322/// "NSString<NSCopyable, NSAmazing>". 2323class ObjCInterfaceType : public Type, public llvm::FoldingSetNode { 2324 ObjCInterfaceDecl *Decl; 2325 2326 // List of protocols for this protocol conforming object type 2327 // List is sorted on protocol name. No protocol is enterred more than once. 2328 llvm::SmallVector<ObjCProtocolDecl*, 4> Protocols; 2329 2330 ObjCInterfaceType(ObjCInterfaceDecl *D, 2331 ObjCProtocolDecl **Protos, unsigned NumP) : 2332 Type(ObjCInterface, QualType(), /*Dependent=*/false), 2333 Decl(D), Protocols(Protos, Protos+NumP) { } 2334 friend class ASTContext; // ASTContext creates these. 2335public: 2336 ObjCInterfaceDecl *getDecl() const { return Decl; } 2337 2338 /// getNumProtocols - Return the number of qualifying protocols in this 2339 /// interface type, or 0 if there are none. 2340 unsigned getNumProtocols() const { return Protocols.size(); } 2341 2342 /// qual_iterator and friends: this provides access to the (potentially empty) 2343 /// list of protocols qualifying this interface. 2344 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 2345 qual_iterator qual_begin() const { return Protocols.begin(); } 2346 qual_iterator qual_end() const { return Protocols.end(); } 2347 bool qual_empty() const { return Protocols.size() == 0; } 2348 2349 virtual void getAsStringInternal(std::string &InnerString, 2350 const PrintingPolicy &Policy) const; 2351 2352 void Profile(llvm::FoldingSetNodeID &ID); 2353 static void Profile(llvm::FoldingSetNodeID &ID, 2354 const ObjCInterfaceDecl *Decl, 2355 ObjCProtocolDecl **protocols, unsigned NumProtocols); 2356 2357 static bool classof(const Type *T) { 2358 return T->getTypeClass() == ObjCInterface; 2359 } 2360 static bool classof(const ObjCInterfaceType *) { return true; } 2361}; 2362 2363/// ObjCObjectPointerType - Used to represent 'id', 'Interface *', 'id <p>', 2364/// and 'Interface <p> *'. 2365/// 2366/// Duplicate protocols are removed and protocol list is canonicalized to be in 2367/// alphabetical order. 2368class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 2369 QualType PointeeType; // A builtin or interface type. 2370 2371 // List of protocols for this protocol conforming object type 2372 // List is sorted on protocol name. No protocol is entered more than once. 2373 llvm::SmallVector<ObjCProtocolDecl*, 8> Protocols; 2374 2375 ObjCObjectPointerType(QualType T, ObjCProtocolDecl **Protos, unsigned NumP) : 2376 Type(ObjCObjectPointer, QualType(), /*Dependent=*/false), 2377 PointeeType(T), Protocols(Protos, Protos+NumP) { } 2378 friend class ASTContext; // ASTContext creates these. 2379 2380public: 2381 // Get the pointee type. Pointee will either be: 2382 // - a built-in type (for 'id' and 'Class'). 2383 // - an interface type (for user-defined types). 2384 // - a TypedefType whose canonical type is an interface (as in 'T' below). 2385 // For example: typedef NSObject T; T *var; 2386 QualType getPointeeType() const { return PointeeType; } 2387 2388 const ObjCInterfaceType *getInterfaceType() const { 2389 return PointeeType->getAs<ObjCInterfaceType>(); 2390 } 2391 /// getInterfaceDecl - returns an interface decl for user-defined types. 2392 ObjCInterfaceDecl *getInterfaceDecl() const { 2393 return getInterfaceType() ? getInterfaceType()->getDecl() : 0; 2394 } 2395 /// isObjCIdType - true for "id". 2396 bool isObjCIdType() const { 2397 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCId) && 2398 !Protocols.size(); 2399 } 2400 /// isObjCClassType - true for "Class". 2401 bool isObjCClassType() const { 2402 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCClass) && 2403 !Protocols.size(); 2404 } 2405 /// isObjCQualifiedIdType - true for "id <p>". 2406 bool isObjCQualifiedIdType() const { 2407 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCId) && 2408 Protocols.size(); 2409 } 2410 /// isObjCQualifiedClassType - true for "Class <p>". 2411 bool isObjCQualifiedClassType() const { 2412 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCClass) && 2413 Protocols.size(); 2414 } 2415 /// qual_iterator and friends: this provides access to the (potentially empty) 2416 /// list of protocols qualifying this interface. 2417 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 2418 2419 qual_iterator qual_begin() const { return Protocols.begin(); } 2420 qual_iterator qual_end() const { return Protocols.end(); } 2421 bool qual_empty() const { return Protocols.size() == 0; } 2422 2423 /// getNumProtocols - Return the number of qualifying protocols in this 2424 /// interface type, or 0 if there are none. 2425 unsigned getNumProtocols() const { return Protocols.size(); } 2426 2427 void Profile(llvm::FoldingSetNodeID &ID); 2428 static void Profile(llvm::FoldingSetNodeID &ID, QualType T, 2429 ObjCProtocolDecl **protocols, unsigned NumProtocols); 2430 virtual void getAsStringInternal(std::string &InnerString, 2431 const PrintingPolicy &Policy) const; 2432 static bool classof(const Type *T) { 2433 return T->getTypeClass() == ObjCObjectPointer; 2434 } 2435 static bool classof(const ObjCObjectPointerType *) { return true; } 2436}; 2437 2438/// A qualifier set is used to build a set of qualifiers. 2439class QualifierCollector : public Qualifiers { 2440 ASTContext *Context; 2441 2442public: 2443 QualifierCollector(Qualifiers Qs = Qualifiers()) 2444 : Qualifiers(Qs), Context(0) {} 2445 QualifierCollector(ASTContext &Context, Qualifiers Qs = Qualifiers()) 2446 : Qualifiers(Qs), Context(&Context) {} 2447 2448 void setContext(ASTContext &C) { Context = &C; } 2449 2450 /// Collect any qualifiers on the given type and return an 2451 /// unqualified type. 2452 const Type *strip(QualType QT) { 2453 addFastQualifiers(QT.getFastQualifiers()); 2454 if (QT.hasNonFastQualifiers()) { 2455 const ExtQuals *EQ = QT.getExtQualsUnsafe(); 2456 Context = &EQ->getContext(); 2457 addQualifiers(EQ->getQualifiers()); 2458 return EQ->getBaseType(); 2459 } 2460 return QT.getTypePtrUnsafe(); 2461 } 2462 2463 /// Apply the collected qualifiers to the given type. 2464 QualType apply(QualType QT) const; 2465 2466 /// Apply the collected qualifiers to the given type. 2467 QualType apply(const Type* T) const; 2468 2469}; 2470 2471 2472// Inline function definitions. 2473 2474inline void QualType::removeConst() { 2475 removeFastQualifiers(Qualifiers::Const); 2476} 2477 2478inline void QualType::removeRestrict() { 2479 removeFastQualifiers(Qualifiers::Restrict); 2480} 2481 2482inline void QualType::removeVolatile() { 2483 QualifierCollector Qc; 2484 const Type *Ty = Qc.strip(*this); 2485 if (Qc.hasVolatile()) { 2486 Qc.removeVolatile(); 2487 *this = Qc.apply(Ty); 2488 } 2489} 2490 2491inline void QualType::removeCVRQualifiers(unsigned Mask) { 2492 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-fast qualifiers"); 2493 2494 // Fast path: we don't need to touch the slow qualifiers. 2495 if (!(Mask & ~Qualifiers::FastMask)) { 2496 removeFastQualifiers(Mask); 2497 return; 2498 } 2499 2500 QualifierCollector Qc; 2501 const Type *Ty = Qc.strip(*this); 2502 Qc.removeCVRQualifiers(Mask); 2503 *this = Qc.apply(Ty); 2504} 2505 2506/// getAddressSpace - Return the address space of this type. 2507inline unsigned QualType::getAddressSpace() const { 2508 if (hasNonFastQualifiers()) { 2509 const ExtQuals *EQ = getExtQualsUnsafe(); 2510 if (EQ->hasAddressSpace()) 2511 return EQ->getAddressSpace(); 2512 } 2513 2514 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2515 if (CT.hasNonFastQualifiers()) { 2516 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 2517 if (EQ->hasAddressSpace()) 2518 return EQ->getAddressSpace(); 2519 } 2520 2521 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 2522 return AT->getElementType().getAddressSpace(); 2523 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 2524 return RT->getAddressSpace(); 2525 return 0; 2526} 2527 2528/// getObjCGCAttr - Return the gc attribute of this type. 2529inline Qualifiers::GC QualType::getObjCGCAttr() const { 2530 if (hasNonFastQualifiers()) { 2531 const ExtQuals *EQ = getExtQualsUnsafe(); 2532 if (EQ->hasObjCGCAttr()) 2533 return EQ->getObjCGCAttr(); 2534 } 2535 2536 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2537 if (CT.hasNonFastQualifiers()) { 2538 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 2539 if (EQ->hasObjCGCAttr()) 2540 return EQ->getObjCGCAttr(); 2541 } 2542 2543 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 2544 return AT->getElementType().getObjCGCAttr(); 2545 if (const ObjCObjectPointerType *PT = CT->getAs<ObjCObjectPointerType>()) 2546 return PT->getPointeeType().getObjCGCAttr(); 2547 // We most look at all pointer types, not just pointer to interface types. 2548 if (const PointerType *PT = CT->getAs<PointerType>()) 2549 return PT->getPointeeType().getObjCGCAttr(); 2550 return Qualifiers::GCNone; 2551} 2552 2553 /// getNoReturnAttr - Returns true if the type has the noreturn attribute, 2554 /// false otherwise. 2555inline bool QualType::getNoReturnAttr() const { 2556 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2557 if (const PointerType *PT = getTypePtr()->getAs<PointerType>()) { 2558 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 2559 return FT->getNoReturnAttr(); 2560 } else if (const FunctionType *FT = getTypePtr()->getAs<FunctionType>()) 2561 return FT->getNoReturnAttr(); 2562 2563 return false; 2564} 2565 2566/// isMoreQualifiedThan - Determine whether this type is more 2567/// qualified than the Other type. For example, "const volatile int" 2568/// is more qualified than "const int", "volatile int", and 2569/// "int". However, it is not more qualified than "const volatile 2570/// int". 2571inline bool QualType::isMoreQualifiedThan(QualType Other) const { 2572 // FIXME: work on arbitrary qualifiers 2573 unsigned MyQuals = this->getCVRQualifiers(); 2574 unsigned OtherQuals = Other.getCVRQualifiers(); 2575 if (getAddressSpace() != Other.getAddressSpace()) 2576 return false; 2577 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 2578} 2579 2580/// isAtLeastAsQualifiedAs - Determine whether this type is at last 2581/// as qualified as the Other type. For example, "const volatile 2582/// int" is at least as qualified as "const int", "volatile int", 2583/// "int", and "const volatile int". 2584inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 2585 // FIXME: work on arbitrary qualifiers 2586 unsigned MyQuals = this->getCVRQualifiers(); 2587 unsigned OtherQuals = Other.getCVRQualifiers(); 2588 if (getAddressSpace() != Other.getAddressSpace()) 2589 return false; 2590 return (MyQuals | OtherQuals) == MyQuals; 2591} 2592 2593/// getNonReferenceType - If Type is a reference type (e.g., const 2594/// int&), returns the type that the reference refers to ("const 2595/// int"). Otherwise, returns the type itself. This routine is used 2596/// throughout Sema to implement C++ 5p6: 2597/// 2598/// If an expression initially has the type "reference to T" (8.3.2, 2599/// 8.5.3), the type is adjusted to "T" prior to any further 2600/// analysis, the expression designates the object or function 2601/// denoted by the reference, and the expression is an lvalue. 2602inline QualType QualType::getNonReferenceType() const { 2603 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 2604 return RefType->getPointeeType(); 2605 else 2606 return *this; 2607} 2608 2609inline const ObjCInterfaceType *Type::getAsPointerToObjCInterfaceType() const { 2610 if (const PointerType *PT = getAs<PointerType>()) 2611 return PT->getPointeeType()->getAs<ObjCInterfaceType>(); 2612 return 0; 2613} 2614 2615// NOTE: All of these methods use "getUnqualifiedType" to strip off address 2616// space qualifiers if present. 2617inline bool Type::isFunctionType() const { 2618 return isa<FunctionType>(CanonicalType.getUnqualifiedType()); 2619} 2620inline bool Type::isPointerType() const { 2621 return isa<PointerType>(CanonicalType.getUnqualifiedType()); 2622} 2623inline bool Type::isAnyPointerType() const { 2624 return isPointerType() || isObjCObjectPointerType(); 2625} 2626inline bool Type::isBlockPointerType() const { 2627 return isa<BlockPointerType>(CanonicalType.getUnqualifiedType()); 2628} 2629inline bool Type::isReferenceType() const { 2630 return isa<ReferenceType>(CanonicalType.getUnqualifiedType()); 2631} 2632inline bool Type::isLValueReferenceType() const { 2633 return isa<LValueReferenceType>(CanonicalType.getUnqualifiedType()); 2634} 2635inline bool Type::isRValueReferenceType() const { 2636 return isa<RValueReferenceType>(CanonicalType.getUnqualifiedType()); 2637} 2638inline bool Type::isFunctionPointerType() const { 2639 if (const PointerType* T = getAs<PointerType>()) 2640 return T->getPointeeType()->isFunctionType(); 2641 else 2642 return false; 2643} 2644inline bool Type::isMemberPointerType() const { 2645 return isa<MemberPointerType>(CanonicalType.getUnqualifiedType()); 2646} 2647inline bool Type::isMemberFunctionPointerType() const { 2648 if (const MemberPointerType* T = getAs<MemberPointerType>()) 2649 return T->getPointeeType()->isFunctionType(); 2650 else 2651 return false; 2652} 2653inline bool Type::isArrayType() const { 2654 return isa<ArrayType>(CanonicalType.getUnqualifiedType()); 2655} 2656inline bool Type::isConstantArrayType() const { 2657 return isa<ConstantArrayType>(CanonicalType.getUnqualifiedType()); 2658} 2659inline bool Type::isIncompleteArrayType() const { 2660 return isa<IncompleteArrayType>(CanonicalType.getUnqualifiedType()); 2661} 2662inline bool Type::isVariableArrayType() const { 2663 return isa<VariableArrayType>(CanonicalType.getUnqualifiedType()); 2664} 2665inline bool Type::isDependentSizedArrayType() const { 2666 return isa<DependentSizedArrayType>(CanonicalType.getUnqualifiedType()); 2667} 2668inline bool Type::isRecordType() const { 2669 return isa<RecordType>(CanonicalType.getUnqualifiedType()); 2670} 2671inline bool Type::isAnyComplexType() const { 2672 return isa<ComplexType>(CanonicalType.getUnqualifiedType()); 2673} 2674inline bool Type::isVectorType() const { 2675 return isa<VectorType>(CanonicalType.getUnqualifiedType()); 2676} 2677inline bool Type::isExtVectorType() const { 2678 return isa<ExtVectorType>(CanonicalType.getUnqualifiedType()); 2679} 2680inline bool Type::isObjCObjectPointerType() const { 2681 return isa<ObjCObjectPointerType>(CanonicalType.getUnqualifiedType()); 2682} 2683inline bool Type::isObjCInterfaceType() const { 2684 return isa<ObjCInterfaceType>(CanonicalType.getUnqualifiedType()); 2685} 2686inline bool Type::isObjCQualifiedIdType() const { 2687 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 2688 return OPT->isObjCQualifiedIdType(); 2689 return false; 2690} 2691inline bool Type::isObjCQualifiedClassType() const { 2692 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 2693 return OPT->isObjCQualifiedClassType(); 2694 return false; 2695} 2696inline bool Type::isObjCIdType() const { 2697 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 2698 return OPT->isObjCIdType(); 2699 return false; 2700} 2701inline bool Type::isObjCClassType() const { 2702 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 2703 return OPT->isObjCClassType(); 2704 return false; 2705} 2706inline bool Type::isObjCBuiltinType() const { 2707 return isObjCIdType() || isObjCClassType(); 2708} 2709inline bool Type::isTemplateTypeParmType() const { 2710 return isa<TemplateTypeParmType>(CanonicalType.getUnqualifiedType()); 2711} 2712 2713inline bool Type::isSpecificBuiltinType(unsigned K) const { 2714 if (const BuiltinType *BT = getAs<BuiltinType>()) 2715 if (BT->getKind() == (BuiltinType::Kind) K) 2716 return true; 2717 return false; 2718} 2719 2720/// \brief Determines whether this is a type for which one can define 2721/// an overloaded operator. 2722inline bool Type::isOverloadableType() const { 2723 return isDependentType() || isRecordType() || isEnumeralType(); 2724} 2725 2726inline bool Type::hasPointerRepresentation() const { 2727 return (isPointerType() || isReferenceType() || isBlockPointerType() || 2728 isObjCInterfaceType() || isObjCObjectPointerType() || 2729 isObjCQualifiedInterfaceType() || isNullPtrType()); 2730} 2731 2732inline bool Type::hasObjCPointerRepresentation() const { 2733 return (isObjCInterfaceType() || isObjCObjectPointerType() || 2734 isObjCQualifiedInterfaceType()); 2735} 2736 2737/// Insertion operator for diagnostics. This allows sending QualType's into a 2738/// diagnostic with <<. 2739inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 2740 QualType T) { 2741 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 2742 Diagnostic::ak_qualtype); 2743 return DB; 2744} 2745 2746/// Member-template getAs<specific type>'. 2747template <typename T> const T *Type::getAs() const { 2748 // If this is directly a T type, return it. 2749 if (const T *Ty = dyn_cast<T>(this)) 2750 return Ty; 2751 2752 // If the canonical form of this type isn't the right kind, reject it. 2753 if (!isa<T>(CanonicalType)) 2754 return 0; 2755 2756 // If this is a typedef for the type, strip the typedef off without 2757 // losing all typedef information. 2758 return cast<T>(getDesugaredType()); 2759} 2760 2761} // end namespace clang 2762 2763#endif 2764