Type.h revision 6b304a0254a13f42390b865ff5ba668a49cc58ae
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 { 34 enum { 35 TypeAlignmentInBits = 3, 36 TypeAlignment = 1 << TypeAlignmentInBits 37 }; 38 class Type; class ExtQuals; 39} 40 41namespace llvm { 42 template <typename T> 43 class PointerLikeTypeTraits; 44 template<> 45 class PointerLikeTypeTraits< ::clang::Type*> { 46 public: 47 static inline void *getAsVoidPointer(::clang::Type *P) { return P; } 48 static inline ::clang::Type *getFromVoidPointer(void *P) { 49 return static_cast< ::clang::Type*>(P); 50 } 51 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 52 }; 53 template<> 54 class PointerLikeTypeTraits< ::clang::ExtQuals*> { 55 public: 56 static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; } 57 static inline ::clang::ExtQuals *getFromVoidPointer(void *P) { 58 return static_cast< ::clang::ExtQuals*>(P); 59 } 60 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 61 }; 62} 63 64namespace clang { 65 class ASTContext; 66 class TypedefDecl; 67 class TemplateDecl; 68 class TemplateTypeParmDecl; 69 class NonTypeTemplateParmDecl; 70 class TemplateTemplateParmDecl; 71 class TagDecl; 72 class RecordDecl; 73 class CXXRecordDecl; 74 class EnumDecl; 75 class FieldDecl; 76 class ObjCInterfaceDecl; 77 class ObjCProtocolDecl; 78 class ObjCMethodDecl; 79 class Expr; 80 class Stmt; 81 class SourceLocation; 82 class StmtIteratorBase; 83 class TemplateArgument; 84 class QualifiedNameType; 85 struct PrintingPolicy; 86 87 // Provide forward declarations for all of the *Type classes 88#define TYPE(Class, Base) class Class##Type; 89#include "clang/AST/TypeNodes.def" 90 91/// Qualifiers - The collection of all-type qualifiers we support. 92/// Clang supports five independent qualifiers: 93/// * C99: const, volatile, and restrict 94/// * Embedded C (TR18037): address spaces 95/// * Objective C: the GC attributes (none, weak, or strong) 96class Qualifiers { 97public: 98 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 99 Const = 0x1, 100 Restrict = 0x2, 101 Volatile = 0x4, 102 CVRMask = Const | Volatile | Restrict 103 }; 104 105 enum GC { 106 GCNone = 0, 107 Weak, 108 Strong 109 }; 110 111 enum { 112 /// The maximum supported address space number. 113 /// 24 bits should be enough for anyone. 114 MaxAddressSpace = 0xffffffu, 115 116 /// The width of the "fast" qualifier mask. 117 FastWidth = 2, 118 119 /// The fast qualifier mask. 120 FastMask = (1 << FastWidth) - 1 121 }; 122 123 Qualifiers() : Mask(0) {} 124 125 static Qualifiers fromFastMask(unsigned Mask) { 126 Qualifiers Qs; 127 Qs.addFastQualifiers(Mask); 128 return Qs; 129 } 130 131 static Qualifiers fromCVRMask(unsigned CVR) { 132 Qualifiers Qs; 133 Qs.addCVRQualifiers(CVR); 134 return Qs; 135 } 136 137 // Deserialize qualifiers from an opaque representation. 138 static Qualifiers fromOpaqueValue(unsigned opaque) { 139 Qualifiers Qs; 140 Qs.Mask = opaque; 141 return Qs; 142 } 143 144 // Serialize these qualifiers into an opaque representation. 145 unsigned getAsOpaqueValue() const { 146 return Mask; 147 } 148 149 bool hasConst() const { return Mask & Const; } 150 void setConst(bool flag) { 151 Mask = (Mask & ~Const) | (flag ? Const : 0); 152 } 153 void removeConst() { Mask &= ~Const; } 154 void addConst() { Mask |= Const; } 155 156 bool hasVolatile() const { return Mask & Volatile; } 157 void setVolatile(bool flag) { 158 Mask = (Mask & ~Volatile) | (flag ? Volatile : 0); 159 } 160 void removeVolatile() { Mask &= ~Volatile; } 161 void addVolatile() { Mask |= Volatile; } 162 163 bool hasRestrict() const { return Mask & Restrict; } 164 void setRestrict(bool flag) { 165 Mask = (Mask & ~Restrict) | (flag ? Restrict : 0); 166 } 167 void removeRestrict() { Mask &= ~Restrict; } 168 void addRestrict() { Mask |= Restrict; } 169 170 bool hasCVRQualifiers() const { return getCVRQualifiers(); } 171 unsigned getCVRQualifiers() const { return Mask & CVRMask; } 172 void setCVRQualifiers(unsigned mask) { 173 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 174 Mask = (Mask & ~CVRMask) | mask; 175 } 176 void removeCVRQualifiers(unsigned mask) { 177 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 178 Mask &= ~mask; 179 } 180 void removeCVRQualifiers() { 181 removeCVRQualifiers(CVRMask); 182 } 183 void addCVRQualifiers(unsigned mask) { 184 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 185 Mask |= mask; 186 } 187 188 bool hasObjCGCAttr() const { return Mask & GCAttrMask; } 189 GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); } 190 void setObjCGCAttr(GC type) { 191 Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift); 192 } 193 void removeObjCGCAttr() { setObjCGCAttr(GCNone); } 194 void addObjCGCAttr(GC type) { 195 assert(type); 196 setObjCGCAttr(type); 197 } 198 199 bool hasAddressSpace() const { return Mask & AddressSpaceMask; } 200 unsigned getAddressSpace() const { return Mask >> AddressSpaceShift; } 201 void setAddressSpace(unsigned space) { 202 assert(space <= MaxAddressSpace); 203 Mask = (Mask & ~AddressSpaceMask) 204 | (((uint32_t) space) << AddressSpaceShift); 205 } 206 void removeAddressSpace() { setAddressSpace(0); } 207 void addAddressSpace(unsigned space) { 208 assert(space); 209 setAddressSpace(space); 210 } 211 212 // Fast qualifiers are those that can be allocated directly 213 // on a QualType object. 214 bool hasFastQualifiers() const { return getFastQualifiers(); } 215 unsigned getFastQualifiers() const { return Mask & FastMask; } 216 void setFastQualifiers(unsigned mask) { 217 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 218 Mask = (Mask & ~FastMask) | mask; 219 } 220 void removeFastQualifiers(unsigned mask) { 221 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 222 Mask &= ~mask; 223 } 224 void removeFastQualifiers() { 225 removeFastQualifiers(FastMask); 226 } 227 void addFastQualifiers(unsigned mask) { 228 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 229 Mask |= mask; 230 } 231 232 /// hasNonFastQualifiers - Return true if the set contains any 233 /// qualifiers which require an ExtQuals node to be allocated. 234 bool hasNonFastQualifiers() const { return Mask & ~FastMask; } 235 Qualifiers getNonFastQualifiers() const { 236 Qualifiers Quals = *this; 237 Quals.setFastQualifiers(0); 238 return Quals; 239 } 240 241 /// hasQualifiers - Return true if the set contains any qualifiers. 242 bool hasQualifiers() const { return Mask; } 243 bool empty() const { return !Mask; } 244 245 /// \brief Add the qualifiers from the given set to this set. 246 void addQualifiers(Qualifiers Q) { 247 // If the other set doesn't have any non-boolean qualifiers, just 248 // bit-or it in. 249 if (!(Q.Mask & ~CVRMask)) 250 Mask |= Q.Mask; 251 else { 252 Mask |= (Q.Mask & CVRMask); 253 if (Q.hasAddressSpace()) 254 addAddressSpace(Q.getAddressSpace()); 255 if (Q.hasObjCGCAttr()) 256 addObjCGCAttr(Q.getObjCGCAttr()); 257 } 258 } 259 260 bool operator==(Qualifiers Other) const { return Mask == Other.Mask; } 261 bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; } 262 263 operator bool() const { return hasQualifiers(); } 264 265 Qualifiers &operator+=(Qualifiers R) { 266 addQualifiers(R); 267 return *this; 268 } 269 270 // Union two qualifier sets. If an enumerated qualifier appears 271 // in both sets, use the one from the right. 272 friend Qualifiers operator+(Qualifiers L, Qualifiers R) { 273 L += R; 274 return L; 275 } 276 277 std::string getAsString() const; 278 std::string getAsString(const PrintingPolicy &Policy) const { 279 std::string Buffer; 280 getAsStringInternal(Buffer, Policy); 281 return Buffer; 282 } 283 void getAsStringInternal(std::string &S, const PrintingPolicy &Policy) const; 284 285 void Profile(llvm::FoldingSetNodeID &ID) const { 286 ID.AddInteger(Mask); 287 } 288 289private: 290 291 // bits: |0 1 2|3 .. 4|5 .. 31| 292 // |C R V|GCAttr|AddrSpace| 293 uint32_t Mask; 294 295 static const uint32_t GCAttrMask = 0x18; 296 static const uint32_t GCAttrShift = 3; 297 static const uint32_t AddressSpaceMask = ~(CVRMask | GCAttrMask); 298 static const uint32_t AddressSpaceShift = 5; 299}; 300 301 302/// ExtQuals - We can encode up to three bits in the low bits of a 303/// type pointer, but there are many more type qualifiers that we want 304/// to be able to apply to an arbitrary type. Therefore we have this 305/// struct, intended to be heap-allocated and used by QualType to 306/// store qualifiers. 307/// 308/// The current design tags the 'const' and 'restrict' qualifiers in 309/// two low bits on the QualType pointer; a third bit records whether 310/// the pointer is an ExtQuals node. 'const' was chosen because it is 311/// orders of magnitude more common than the other two qualifiers, in 312/// both library and user code. It's relatively rare to see 313/// 'restrict' in user code, but many standard C headers are saturated 314/// with 'restrict' declarations, so that representing them efficiently 315/// is a critical goal of this representation. 316class ExtQuals : public llvm::FoldingSetNode { 317 // NOTE: changing the fast qualifiers should be straightforward as 318 // long as you don't make 'const' non-fast. 319 // 1. Qualifiers: 320 // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). 321 // Fast qualifiers must occupy the low-order bits. 322 // b) Update Qualifiers::FastWidth and FastMask. 323 // 2. QualType: 324 // a) Update is{Volatile,Restrict}Qualified(), defined inline. 325 // b) Update remove{Volatile,Restrict}, defined near the end of 326 // this header. 327 // 3. ASTContext: 328 // a) Update get{Volatile,Restrict}Type. 329 330 /// Context - the context to which this set belongs. We save this 331 /// here so that QualifierCollector can use it to reapply extended 332 /// qualifiers to an arbitrary type without requiring a context to 333 /// be pushed through every single API dealing with qualifiers. 334 ASTContext& Context; 335 336 /// BaseType - the underlying type that this qualifies 337 const Type *BaseType; 338 339 /// Quals - the immutable set of qualifiers applied by this 340 /// node; always contains extended qualifiers. 341 Qualifiers Quals; 342 343public: 344 ExtQuals(ASTContext& Context, const Type *Base, Qualifiers Quals) 345 : Context(Context), BaseType(Base), Quals(Quals) 346 { 347 assert(Quals.hasNonFastQualifiers() 348 && "ExtQuals created with no fast qualifiers"); 349 assert(!Quals.hasFastQualifiers() 350 && "ExtQuals created with fast qualifiers"); 351 } 352 353 Qualifiers getQualifiers() const { return Quals; } 354 355 bool hasVolatile() const { return Quals.hasVolatile(); } 356 357 bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } 358 Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } 359 360 bool hasAddressSpace() const { return Quals.hasAddressSpace(); } 361 unsigned getAddressSpace() const { return Quals.getAddressSpace(); } 362 363 const Type *getBaseType() const { return BaseType; } 364 365 ASTContext &getContext() const { return Context; } 366 367public: 368 void Profile(llvm::FoldingSetNodeID &ID) const { 369 Profile(ID, getBaseType(), Quals); 370 } 371 static void Profile(llvm::FoldingSetNodeID &ID, 372 const Type *BaseType, 373 Qualifiers Quals) { 374 assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!"); 375 ID.AddPointer(BaseType); 376 Quals.Profile(ID); 377 } 378}; 379 380 381/// QualType - For efficiency, we don't store CV-qualified types as nodes on 382/// their own: instead each reference to a type stores the qualifiers. This 383/// greatly reduces the number of nodes we need to allocate for types (for 384/// example we only need one for 'int', 'const int', 'volatile int', 385/// 'const volatile int', etc). 386/// 387/// As an added efficiency bonus, instead of making this a pair, we 388/// just store the two bits we care about in the low bits of the 389/// pointer. To handle the packing/unpacking, we make QualType be a 390/// simple wrapper class that acts like a smart pointer. A third bit 391/// indicates whether there are extended qualifiers present, in which 392/// case the pointer points to a special structure. 393class QualType { 394 // Thankfully, these are efficiently composable. 395 llvm::PointerIntPair<llvm::PointerUnion<const Type*,const ExtQuals*>, 396 Qualifiers::FastWidth> Value; 397 398 bool hasExtQuals() const { 399 return Value.getPointer().is<const ExtQuals*>(); 400 } 401 402 const ExtQuals *getExtQualsUnsafe() const { 403 return Value.getPointer().get<const ExtQuals*>(); 404 } 405 406 const Type *getTypePtrUnsafe() const { 407 return Value.getPointer().get<const Type*>(); 408 } 409 410 friend class QualifierCollector; 411public: 412 QualType() {} 413 414 QualType(const Type *Ptr, unsigned Quals) 415 : Value(Ptr, Quals) {} 416 QualType(const ExtQuals *Ptr, unsigned Quals) 417 : Value(Ptr, Quals) {} 418 419 unsigned getFastQualifiers() const { return Value.getInt(); } 420 void setFastQualifiers(unsigned Quals) { Value.setInt(Quals); } 421 422 /// Retrieves a pointer to the underlying (unqualified) type. 423 /// This should really return a const Type, but it's not worth 424 /// changing all the users right now. 425 Type *getTypePtr() const { 426 if (hasNonFastQualifiers()) 427 return const_cast<Type*>(getExtQualsUnsafe()->getBaseType()); 428 return const_cast<Type*>(getTypePtrUnsafe()); 429 } 430 431 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 432 static QualType getFromOpaquePtr(void *Ptr) { 433 QualType T; 434 T.Value.setFromOpaqueValue(Ptr); 435 return T; 436 } 437 438 Type &operator*() const { 439 return *getTypePtr(); 440 } 441 442 Type *operator->() const { 443 return getTypePtr(); 444 } 445 446 /// isNull - Return true if this QualType doesn't point to a type yet. 447 bool isNull() const { 448 return Value.getPointer().isNull(); 449 } 450 451 bool isConstQualified() const { 452 return (getFastQualifiers() & Qualifiers::Const); 453 } 454 bool isRestrictQualified() const { 455 return (getFastQualifiers() & Qualifiers::Restrict); 456 } 457 bool isVolatileQualified() const { 458 return (hasNonFastQualifiers() && getExtQualsUnsafe()->hasVolatile()); 459 } 460 461 // Determines whether this type has any direct qualifiers. 462 bool hasQualifiers() const { 463 return getFastQualifiers() || hasNonFastQualifiers(); 464 } 465 466 bool hasNonFastQualifiers() const { 467 return hasExtQuals(); 468 } 469 470 // Retrieves the set of qualifiers belonging to this type. 471 Qualifiers getQualifiers() const { 472 Qualifiers Quals; 473 if (hasNonFastQualifiers()) 474 Quals = getExtQualsUnsafe()->getQualifiers(); 475 Quals.addFastQualifiers(getFastQualifiers()); 476 return Quals; 477 } 478 479 // Retrieves the CVR qualifiers of this type. 480 unsigned getCVRQualifiers() const { 481 unsigned CVR = getFastQualifiers(); 482 if (isVolatileQualified()) CVR |= Qualifiers::Volatile; 483 return CVR; 484 } 485 486 bool isConstant(ASTContext& Ctx) const; 487 488 // Don't promise in the API that anything besides 'const' can be 489 // easily added. 490 491 /// addConst - add the specified type qualifier to this QualType. 492 void addConst() { 493 addFastQualifiers(Qualifiers::Const); 494 } 495 QualType withConst() const { 496 return withFastQualifiers(Qualifiers::Const); 497 } 498 499 void addFastQualifiers(unsigned TQs) { 500 assert(!(TQs & ~Qualifiers::FastMask) 501 && "non-fast qualifier bits set in mask!"); 502 Value.setInt(Value.getInt() | TQs); 503 } 504 505 void removeConst(); 506 void removeVolatile(); 507 void removeRestrict(); 508 void removeCVRQualifiers(unsigned Mask); 509 510 void removeFastQualifiers() { Value.setInt(0); } 511 void removeFastQualifiers(unsigned Mask) { 512 assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers"); 513 Value.setInt(Value.getInt() & ~Mask); 514 } 515 516 // Creates a type with the given qualifiers in addition to any 517 // qualifiers already on this type. 518 QualType withFastQualifiers(unsigned TQs) const { 519 QualType T = *this; 520 T.addFastQualifiers(TQs); 521 return T; 522 } 523 524 // Creates a type with exactly the given fast qualifiers, removing 525 // any existing fast qualifiers. 526 QualType withExactFastQualifiers(unsigned TQs) const { 527 return withoutFastQualifiers().withFastQualifiers(TQs); 528 } 529 530 // Removes fast qualifiers, but leaves any extended qualifiers in place. 531 QualType withoutFastQualifiers() const { 532 QualType T = *this; 533 T.removeFastQualifiers(); 534 return T; 535 } 536 537 QualType getUnqualifiedType() const { return QualType(getTypePtr(), 0); } 538 539 bool isMoreQualifiedThan(QualType Other) const; 540 bool isAtLeastAsQualifiedAs(QualType Other) const; 541 QualType getNonReferenceType() const; 542 543 /// getDesugaredType - Return the specified type with any "sugar" removed from 544 /// the type. This takes off typedefs, typeof's etc. If the outer level of 545 /// the type is already concrete, it returns it unmodified. This is similar 546 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 547 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 548 /// concrete. 549 /// 550 /// Qualifiers are left in place. 551 QualType getDesugaredType(bool ForDisplay = false) const; 552 553 /// operator==/!= - Indicate whether the specified types and qualifiers are 554 /// identical. 555 friend bool operator==(const QualType &LHS, const QualType &RHS) { 556 return LHS.Value == RHS.Value; 557 } 558 friend bool operator!=(const QualType &LHS, const QualType &RHS) { 559 return LHS.Value != RHS.Value; 560 } 561 std::string getAsString() const; 562 563 std::string getAsString(const PrintingPolicy &Policy) const { 564 std::string S; 565 getAsStringInternal(S, Policy); 566 return S; 567 } 568 void getAsStringInternal(std::string &Str, 569 const PrintingPolicy &Policy) const; 570 571 void dump(const char *s) const; 572 void dump() const; 573 574 void Profile(llvm::FoldingSetNodeID &ID) const { 575 ID.AddPointer(getAsOpaquePtr()); 576 } 577 578 /// getAddressSpace - Return the address space of this type. 579 inline unsigned getAddressSpace() const; 580 581 /// GCAttrTypesAttr - Returns gc attribute of this type. 582 inline Qualifiers::GC getObjCGCAttr() const; 583 584 /// isObjCGCWeak true when Type is objc's weak. 585 bool isObjCGCWeak() const { 586 return getObjCGCAttr() == Qualifiers::Weak; 587 } 588 589 /// isObjCGCStrong true when Type is objc's strong. 590 bool isObjCGCStrong() const { 591 return getObjCGCAttr() == Qualifiers::Strong; 592 } 593 594 /// getNoReturnAttr - Returns true if the type has the noreturn attribute, 595 /// false otherwise. 596 bool getNoReturnAttr() const; 597}; 598 599} // end clang. 600 601namespace llvm { 602/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 603/// to a specific Type class. 604template<> struct simplify_type<const ::clang::QualType> { 605 typedef ::clang::Type* SimpleType; 606 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 607 return Val.getTypePtr(); 608 } 609}; 610template<> struct simplify_type< ::clang::QualType> 611 : public simplify_type<const ::clang::QualType> {}; 612 613// Teach SmallPtrSet that QualType is "basically a pointer". 614template<> 615class PointerLikeTypeTraits<clang::QualType> { 616public: 617 static inline void *getAsVoidPointer(clang::QualType P) { 618 return P.getAsOpaquePtr(); 619 } 620 static inline clang::QualType getFromVoidPointer(void *P) { 621 return clang::QualType::getFromOpaquePtr(P); 622 } 623 // Various qualifiers go in low bits. 624 enum { NumLowBitsAvailable = 0 }; 625}; 626 627} // end namespace llvm 628 629namespace clang { 630 631/// Type - This is the base class of the type hierarchy. A central concept 632/// with types is that each type always has a canonical type. A canonical type 633/// is the type with any typedef names stripped out of it or the types it 634/// references. For example, consider: 635/// 636/// typedef int foo; 637/// typedef foo* bar; 638/// 'int *' 'foo *' 'bar' 639/// 640/// There will be a Type object created for 'int'. Since int is canonical, its 641/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 642/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 643/// there is a PointerType that represents 'int*', which, like 'int', is 644/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 645/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 646/// is also 'int*'. 647/// 648/// Non-canonical types are useful for emitting diagnostics, without losing 649/// information about typedefs being used. Canonical types are useful for type 650/// comparisons (they allow by-pointer equality tests) and useful for reasoning 651/// about whether something has a particular form (e.g. is a function type), 652/// because they implicitly, recursively, strip all typedefs out of a type. 653/// 654/// Types, once created, are immutable. 655/// 656class Type { 657public: 658 enum TypeClass { 659#define TYPE(Class, Base) Class, 660#define ABSTRACT_TYPE(Class, Base) 661#include "clang/AST/TypeNodes.def" 662 TagFirst = Record, TagLast = Enum 663 }; 664 665protected: 666 enum { TypeClassBitSize = 6 }; 667 668private: 669 QualType CanonicalType; 670 671 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 672 bool Dependent : 1; 673 674 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 675 /// Note that this should stay at the end of the ivars for Type so that 676 /// subclasses can pack their bitfields into the same word. 677 unsigned TC : TypeClassBitSize; 678 679 Type(const Type&); // DO NOT IMPLEMENT. 680 void operator=(const Type&); // DO NOT IMPLEMENT. 681protected: 682 // silence VC++ warning C4355: 'this' : used in base member initializer list 683 Type *this_() { return this; } 684 Type(TypeClass tc, QualType Canonical, bool dependent) 685 : CanonicalType(Canonical.isNull() ? QualType(this_(), 0) : Canonical), 686 Dependent(dependent), TC(tc) {} 687 virtual ~Type() {} 688 virtual void Destroy(ASTContext& C); 689 friend class ASTContext; 690 691public: 692 TypeClass getTypeClass() const { return static_cast<TypeClass>(TC); } 693 694 bool isCanonical() const { return CanonicalType.getTypePtr() == this; } 695 696 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 697 /// object types, function types, and incomplete types. 698 699 /// \brief Determines whether the type describes an object in memory. 700 /// 701 /// Note that this definition of object type corresponds to the C++ 702 /// definition of object type, which includes incomplete types, as 703 /// opposed to the C definition (which does not include incomplete 704 /// types). 705 bool isObjectType() const; 706 707 /// isIncompleteType - Return true if this is an incomplete type. 708 /// A type that can describe objects, but which lacks information needed to 709 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 710 /// routine will need to determine if the size is actually required. 711 bool isIncompleteType() const; 712 713 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 714 /// type, in other words, not a function type. 715 bool isIncompleteOrObjectType() const { 716 return !isFunctionType(); 717 } 718 719 /// isPODType - Return true if this is a plain-old-data type (C++ 3.9p10). 720 bool isPODType() const; 721 722 /// isVariablyModifiedType (C99 6.7.5.2p2) - Return true for variable array 723 /// types that have a non-constant expression. This does not include "[]". 724 bool isVariablyModifiedType() const; 725 726 /// Helper methods to distinguish type categories. All type predicates 727 /// operate on the canonical type, ignoring typedefs and qualifiers. 728 729 /// isSpecificBuiltinType - Test for a particular builtin type. 730 bool isSpecificBuiltinType(unsigned K) const; 731 732 /// isIntegerType() does *not* include complex integers (a GCC extension). 733 /// isComplexIntegerType() can be used to test for complex integers. 734 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 735 bool isEnumeralType() const; 736 bool isBooleanType() const; 737 bool isCharType() const; 738 bool isWideCharType() const; 739 bool isIntegralType() const; 740 741 /// Floating point categories. 742 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 743 /// isComplexType() does *not* include complex integers (a GCC extension). 744 /// isComplexIntegerType() can be used to test for complex integers. 745 bool isComplexType() const; // C99 6.2.5p11 (complex) 746 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 747 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 748 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 749 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 750 bool isVoidType() const; // C99 6.2.5p19 751 bool isDerivedType() const; // C99 6.2.5p20 752 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 753 bool isAggregateType() const; 754 755 // Type Predicates: Check to see if this type is structurally the specified 756 // type, ignoring typedefs and qualifiers. 757 bool isFunctionType() const; 758 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 759 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 760 bool isPointerType() const; 761 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 762 bool isBlockPointerType() const; 763 bool isVoidPointerType() const; 764 bool isReferenceType() const; 765 bool isLValueReferenceType() const; 766 bool isRValueReferenceType() const; 767 bool isFunctionPointerType() const; 768 bool isMemberPointerType() const; 769 bool isMemberFunctionPointerType() const; 770 bool isArrayType() const; 771 bool isConstantArrayType() const; 772 bool isIncompleteArrayType() const; 773 bool isVariableArrayType() const; 774 bool isDependentSizedArrayType() const; 775 bool isRecordType() const; 776 bool isClassType() const; 777 bool isStructureType() const; 778 bool isUnionType() const; 779 bool isComplexIntegerType() const; // GCC _Complex integer type. 780 bool isVectorType() const; // GCC vector type. 781 bool isExtVectorType() const; // Extended vector type. 782 bool isObjCObjectPointerType() const; // Pointer to *any* ObjC object. 783 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 784 // for the common case. 785 bool isObjCInterfaceType() const; // NSString or NSString<foo> 786 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 787 bool isObjCQualifiedIdType() const; // id<foo> 788 bool isObjCQualifiedClassType() const; // Class<foo> 789 bool isObjCIdType() const; // id 790 bool isObjCClassType() const; // Class 791 bool isObjCBuiltinType() const; // 'id' or 'Class' 792 bool isTemplateTypeParmType() const; // C++ template type parameter 793 bool isNullPtrType() const; // C++0x nullptr_t 794 795 /// isDependentType - Whether this type is a dependent type, meaning 796 /// that its definition somehow depends on a template parameter 797 /// (C++ [temp.dep.type]). 798 bool isDependentType() const { return Dependent; } 799 bool isOverloadableType() const; 800 801 /// hasPointerRepresentation - Whether this type is represented 802 /// natively as a pointer; this includes pointers, references, block 803 /// pointers, and Objective-C interface, qualified id, and qualified 804 /// interface types, as well as nullptr_t. 805 bool hasPointerRepresentation() const; 806 807 /// hasObjCPointerRepresentation - Whether this type can represent 808 /// an objective pointer type for the purpose of GC'ability 809 bool hasObjCPointerRepresentation() const; 810 811 // Type Checking Functions: Check to see if this type is structurally the 812 // specified type, ignoring typedefs and qualifiers, and return a pointer to 813 // the best type we can. 814 const RecordType *getAsStructureType() const; 815 /// NOTE: getAs*ArrayType are methods on ASTContext. 816 const RecordType *getAsUnionType() const; 817 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 818 // The following is a convenience method that returns an ObjCObjectPointerType 819 // for object declared using an interface. 820 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 821 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 822 const ObjCInterfaceType *getAsObjCQualifiedInterfaceType() const; 823 const CXXRecordDecl *getCXXRecordDeclForPointerType() const; 824 825 // Member-template getAs<specific type>'. This scheme will eventually 826 // replace the specific getAsXXXX methods above. 827 // 828 // There are some specializations of this member template listed 829 // immediately following this class. 830 template <typename T> const T *getAs() const; 831 832 /// getAsPointerToObjCInterfaceType - If this is a pointer to an ObjC 833 /// interface, return the interface type, otherwise return null. 834 const ObjCInterfaceType *getAsPointerToObjCInterfaceType() const; 835 836 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 837 /// element type of the array, potentially with type qualifiers missing. 838 /// This method should never be used when type qualifiers are meaningful. 839 const Type *getArrayElementTypeNoTypeQual() const; 840 841 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 842 /// pointer, this returns the respective pointee. 843 QualType getPointeeType() const; 844 845 /// getDesugaredType - Return the specified type with any "sugar" removed from 846 /// the type. This takes off typedefs, typeof's etc. If the outer level of 847 /// the type is already concrete, it returns it unmodified. This is similar 848 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 849 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 850 /// concrete. 851 QualType getDesugaredType(bool ForDisplay = false) const; 852 853 /// More type predicates useful for type checking/promotion 854 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 855 856 /// isSignedIntegerType - Return true if this is an integer type that is 857 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 858 /// an enum decl which has a signed representation, or a vector of signed 859 /// integer element type. 860 bool isSignedIntegerType() const; 861 862 /// isUnsignedIntegerType - Return true if this is an integer type that is 863 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 864 /// decl which has an unsigned representation, or a vector of unsigned integer 865 /// element type. 866 bool isUnsignedIntegerType() const; 867 868 /// isConstantSizeType - Return true if this is not a variable sized type, 869 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 870 /// incomplete types. 871 bool isConstantSizeType() const; 872 873 /// isSpecifierType - Returns true if this type can be represented by some 874 /// set of type specifiers. 875 bool isSpecifierType() const; 876 877 QualType getCanonicalTypeInternal() const { return CanonicalType; } 878 void dump() const; 879 virtual void getAsStringInternal(std::string &InnerString, 880 const PrintingPolicy &Policy) const = 0; 881 static bool classof(const Type *) { return true; } 882}; 883 884template <> inline const TypedefType *Type::getAs() const { 885 return dyn_cast<TypedefType>(this); 886} 887 888// We can do canonical leaf types faster, because we don't have to 889// worry about preserving child type decoration. 890#define TYPE(Class, Base) 891#define LEAF_TYPE(Class) \ 892template <> inline const Class##Type *Type::getAs() const { \ 893 return dyn_cast<Class##Type>(CanonicalType); \ 894} 895#include "clang/AST/TypeNodes.def" 896 897 898/// BuiltinType - This class is used for builtin types like 'int'. Builtin 899/// types are always canonical and have a literal name field. 900class BuiltinType : public Type { 901public: 902 enum Kind { 903 Void, 904 905 Bool, // This is bool and/or _Bool. 906 Char_U, // This is 'char' for targets where char is unsigned. 907 UChar, // This is explicitly qualified unsigned char. 908 Char16, // This is 'char16_t' for C++. 909 Char32, // This is 'char32_t' for C++. 910 UShort, 911 UInt, 912 ULong, 913 ULongLong, 914 UInt128, // __uint128_t 915 916 Char_S, // This is 'char' for targets where char is signed. 917 SChar, // This is explicitly qualified signed char. 918 WChar, // This is 'wchar_t' for C++. 919 Short, 920 Int, 921 Long, 922 LongLong, 923 Int128, // __int128_t 924 925 Float, Double, LongDouble, 926 927 NullPtr, // This is the type of C++0x 'nullptr'. 928 929 Overload, // This represents the type of an overloaded function declaration. 930 Dependent, // This represents the type of a type-dependent expression. 931 932 UndeducedAuto, // In C++0x, this represents the type of an auto variable 933 // that has not been deduced yet. 934 ObjCId, // This represents the ObjC 'id' type. 935 ObjCClass // This represents the ObjC 'Class' type. 936 }; 937private: 938 Kind TypeKind; 939public: 940 BuiltinType(Kind K) 941 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent)), 942 TypeKind(K) {} 943 944 Kind getKind() const { return TypeKind; } 945 const char *getName(const LangOptions &LO) const; 946 947 virtual void getAsStringInternal(std::string &InnerString, 948 const PrintingPolicy &Policy) const; 949 950 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 951 static bool classof(const BuiltinType *) { return true; } 952}; 953 954/// FixedWidthIntType - Used for arbitrary width types that we either don't 955/// want to or can't map to named integer types. These always have a lower 956/// integer rank than builtin types of the same width. 957class FixedWidthIntType : public Type { 958private: 959 unsigned Width; 960 bool Signed; 961public: 962 FixedWidthIntType(unsigned W, bool S) : Type(FixedWidthInt, QualType(), false), 963 Width(W), Signed(S) {} 964 965 unsigned getWidth() const { return Width; } 966 bool isSigned() const { return Signed; } 967 const char *getName() const; 968 969 virtual void getAsStringInternal(std::string &InnerString, 970 const PrintingPolicy &Policy) const; 971 972 static bool classof(const Type *T) { return T->getTypeClass() == FixedWidthInt; } 973 static bool classof(const FixedWidthIntType *) { return true; } 974}; 975 976/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 977/// types (_Complex float etc) as well as the GCC integer complex extensions. 978/// 979class ComplexType : public Type, public llvm::FoldingSetNode { 980 QualType ElementType; 981 ComplexType(QualType Element, QualType CanonicalPtr) : 982 Type(Complex, CanonicalPtr, Element->isDependentType()), 983 ElementType(Element) { 984 } 985 friend class ASTContext; // ASTContext creates these. 986public: 987 QualType getElementType() const { return ElementType; } 988 989 virtual void getAsStringInternal(std::string &InnerString, 990 const PrintingPolicy &Policy) const; 991 992 void Profile(llvm::FoldingSetNodeID &ID) { 993 Profile(ID, getElementType()); 994 } 995 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 996 ID.AddPointer(Element.getAsOpaquePtr()); 997 } 998 999 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1000 static bool classof(const ComplexType *) { return true; } 1001}; 1002 1003/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1004/// 1005class PointerType : public Type, public llvm::FoldingSetNode { 1006 QualType PointeeType; 1007 1008 PointerType(QualType Pointee, QualType CanonicalPtr) : 1009 Type(Pointer, CanonicalPtr, Pointee->isDependentType()), PointeeType(Pointee) { 1010 } 1011 friend class ASTContext; // ASTContext creates these. 1012public: 1013 1014 virtual void getAsStringInternal(std::string &InnerString, 1015 const PrintingPolicy &Policy) const; 1016 1017 QualType getPointeeType() const { return PointeeType; } 1018 1019 void Profile(llvm::FoldingSetNodeID &ID) { 1020 Profile(ID, getPointeeType()); 1021 } 1022 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1023 ID.AddPointer(Pointee.getAsOpaquePtr()); 1024 } 1025 1026 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1027 static bool classof(const PointerType *) { return true; } 1028}; 1029 1030/// BlockPointerType - pointer to a block type. 1031/// This type is to represent types syntactically represented as 1032/// "void (^)(int)", etc. Pointee is required to always be a function type. 1033/// 1034class BlockPointerType : public Type, public llvm::FoldingSetNode { 1035 QualType PointeeType; // Block is some kind of pointer type 1036 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1037 Type(BlockPointer, CanonicalCls, Pointee->isDependentType()), 1038 PointeeType(Pointee) { 1039 } 1040 friend class ASTContext; // ASTContext creates these. 1041public: 1042 1043 // Get the pointee type. Pointee is required to always be a function type. 1044 QualType getPointeeType() const { return PointeeType; } 1045 1046 virtual void getAsStringInternal(std::string &InnerString, 1047 const PrintingPolicy &Policy) const; 1048 1049 void Profile(llvm::FoldingSetNodeID &ID) { 1050 Profile(ID, getPointeeType()); 1051 } 1052 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1053 ID.AddPointer(Pointee.getAsOpaquePtr()); 1054 } 1055 1056 static bool classof(const Type *T) { 1057 return T->getTypeClass() == BlockPointer; 1058 } 1059 static bool classof(const BlockPointerType *) { return true; } 1060}; 1061 1062/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 1063/// 1064class ReferenceType : public Type, public llvm::FoldingSetNode { 1065 QualType PointeeType; 1066 1067protected: 1068 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef) : 1069 Type(tc, CanonicalRef, Referencee->isDependentType()), 1070 PointeeType(Referencee) { 1071 } 1072public: 1073 QualType getPointeeType() const { return PointeeType; } 1074 1075 void Profile(llvm::FoldingSetNodeID &ID) { 1076 Profile(ID, getPointeeType()); 1077 } 1078 static void Profile(llvm::FoldingSetNodeID &ID, QualType Referencee) { 1079 ID.AddPointer(Referencee.getAsOpaquePtr()); 1080 } 1081 1082 static bool classof(const Type *T) { 1083 return T->getTypeClass() == LValueReference || 1084 T->getTypeClass() == RValueReference; 1085 } 1086 static bool classof(const ReferenceType *) { return true; } 1087}; 1088 1089/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 1090/// 1091class LValueReferenceType : public ReferenceType { 1092 LValueReferenceType(QualType Referencee, QualType CanonicalRef) : 1093 ReferenceType(LValueReference, Referencee, CanonicalRef) { 1094 } 1095 friend class ASTContext; // ASTContext creates these 1096public: 1097 virtual void getAsStringInternal(std::string &InnerString, 1098 const PrintingPolicy &Policy) const; 1099 1100 static bool classof(const Type *T) { 1101 return T->getTypeClass() == LValueReference; 1102 } 1103 static bool classof(const LValueReferenceType *) { return true; } 1104}; 1105 1106/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 1107/// 1108class RValueReferenceType : public ReferenceType { 1109 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 1110 ReferenceType(RValueReference, Referencee, CanonicalRef) { 1111 } 1112 friend class ASTContext; // ASTContext creates these 1113public: 1114 virtual void getAsStringInternal(std::string &InnerString, 1115 const PrintingPolicy &Policy) const; 1116 1117 static bool classof(const Type *T) { 1118 return T->getTypeClass() == RValueReference; 1119 } 1120 static bool classof(const RValueReferenceType *) { return true; } 1121}; 1122 1123/// MemberPointerType - C++ 8.3.3 - Pointers to members 1124/// 1125class MemberPointerType : public Type, public llvm::FoldingSetNode { 1126 QualType PointeeType; 1127 /// The class of which the pointee is a member. Must ultimately be a 1128 /// RecordType, but could be a typedef or a template parameter too. 1129 const Type *Class; 1130 1131 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 1132 Type(MemberPointer, CanonicalPtr, 1133 Cls->isDependentType() || Pointee->isDependentType()), 1134 PointeeType(Pointee), Class(Cls) { 1135 } 1136 friend class ASTContext; // ASTContext creates these. 1137public: 1138 1139 QualType getPointeeType() const { return PointeeType; } 1140 1141 const Type *getClass() const { return Class; } 1142 1143 virtual void getAsStringInternal(std::string &InnerString, 1144 const PrintingPolicy &Policy) const; 1145 1146 void Profile(llvm::FoldingSetNodeID &ID) { 1147 Profile(ID, getPointeeType(), getClass()); 1148 } 1149 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 1150 const Type *Class) { 1151 ID.AddPointer(Pointee.getAsOpaquePtr()); 1152 ID.AddPointer(Class); 1153 } 1154 1155 static bool classof(const Type *T) { 1156 return T->getTypeClass() == MemberPointer; 1157 } 1158 static bool classof(const MemberPointerType *) { return true; } 1159}; 1160 1161/// ArrayType - C99 6.7.5.2 - Array Declarators. 1162/// 1163class ArrayType : public Type, public llvm::FoldingSetNode { 1164public: 1165 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 1166 /// an array with a static size (e.g. int X[static 4]), or an array 1167 /// with a star size (e.g. int X[*]). 1168 /// 'static' is only allowed on function parameters. 1169 enum ArraySizeModifier { 1170 Normal, Static, Star 1171 }; 1172private: 1173 /// ElementType - The element type of the array. 1174 QualType ElementType; 1175 1176 // NOTE: VC++ treats enums as signed, avoid using the ArraySizeModifier enum 1177 /// NOTE: These fields are packed into the bitfields space in the Type class. 1178 unsigned SizeModifier : 2; 1179 1180 /// IndexTypeQuals - Capture qualifiers in declarations like: 1181 /// 'int X[static restrict 4]'. For function parameters only. 1182 unsigned IndexTypeQuals : 3; 1183 1184protected: 1185 // C++ [temp.dep.type]p1: 1186 // A type is dependent if it is... 1187 // - an array type constructed from any dependent type or whose 1188 // size is specified by a constant expression that is 1189 // value-dependent, 1190 ArrayType(TypeClass tc, QualType et, QualType can, 1191 ArraySizeModifier sm, unsigned tq) 1192 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray), 1193 ElementType(et), SizeModifier(sm), IndexTypeQuals(tq) {} 1194 1195 friend class ASTContext; // ASTContext creates these. 1196public: 1197 QualType getElementType() const { return ElementType; } 1198 ArraySizeModifier getSizeModifier() const { 1199 return ArraySizeModifier(SizeModifier); 1200 } 1201 Qualifiers getIndexTypeQualifiers() const { 1202 return Qualifiers::fromCVRMask(IndexTypeQuals); 1203 } 1204 unsigned getIndexTypeCVRQualifiers() const { return IndexTypeQuals; } 1205 1206 static bool classof(const Type *T) { 1207 return T->getTypeClass() == ConstantArray || 1208 T->getTypeClass() == ConstantArrayWithExpr || 1209 T->getTypeClass() == ConstantArrayWithoutExpr || 1210 T->getTypeClass() == VariableArray || 1211 T->getTypeClass() == IncompleteArray || 1212 T->getTypeClass() == DependentSizedArray; 1213 } 1214 static bool classof(const ArrayType *) { return true; } 1215}; 1216 1217/// ConstantArrayType - This class represents the canonical version of 1218/// C arrays with a specified constant size. For example, the canonical 1219/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 1220/// type is 'int' and the size is 404. 1221class ConstantArrayType : public ArrayType { 1222 llvm::APInt Size; // Allows us to unique the type. 1223 1224 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 1225 ArraySizeModifier sm, unsigned tq) 1226 : ArrayType(ConstantArray, et, can, sm, tq), 1227 Size(size) {} 1228protected: 1229 ConstantArrayType(TypeClass tc, QualType et, QualType can, 1230 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 1231 : ArrayType(tc, et, can, sm, tq), Size(size) {} 1232 friend class ASTContext; // ASTContext creates these. 1233public: 1234 const llvm::APInt &getSize() const { return Size; } 1235 virtual void getAsStringInternal(std::string &InnerString, 1236 const PrintingPolicy &Policy) const; 1237 1238 void Profile(llvm::FoldingSetNodeID &ID) { 1239 Profile(ID, getElementType(), getSize(), 1240 getSizeModifier(), getIndexTypeCVRQualifiers()); 1241 } 1242 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1243 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 1244 unsigned TypeQuals) { 1245 ID.AddPointer(ET.getAsOpaquePtr()); 1246 ID.AddInteger(ArraySize.getZExtValue()); 1247 ID.AddInteger(SizeMod); 1248 ID.AddInteger(TypeQuals); 1249 } 1250 static bool classof(const Type *T) { 1251 return T->getTypeClass() == ConstantArray || 1252 T->getTypeClass() == ConstantArrayWithExpr || 1253 T->getTypeClass() == ConstantArrayWithoutExpr; 1254 } 1255 static bool classof(const ConstantArrayType *) { return true; } 1256}; 1257 1258/// ConstantArrayWithExprType - This class represents C arrays with a 1259/// constant size specified by means of an integer constant expression. 1260/// For example 'int A[sizeof(int)]' has ConstantArrayWithExprType where 1261/// the element type is 'int' and the size expression is 'sizeof(int)'. 1262/// These types are non-canonical. 1263class ConstantArrayWithExprType : public ConstantArrayType { 1264 /// SizeExpr - The ICE occurring in the concrete syntax. 1265 Expr *SizeExpr; 1266 /// Brackets - The left and right array brackets. 1267 SourceRange Brackets; 1268 1269 ConstantArrayWithExprType(QualType et, QualType can, 1270 const llvm::APInt &size, Expr *e, 1271 ArraySizeModifier sm, unsigned tq, 1272 SourceRange brackets) 1273 : ConstantArrayType(ConstantArrayWithExpr, et, can, size, sm, tq), 1274 SizeExpr(e), Brackets(brackets) {} 1275 friend class ASTContext; // ASTContext creates these. 1276 virtual void Destroy(ASTContext& C); 1277 1278public: 1279 Expr *getSizeExpr() const { return SizeExpr; } 1280 SourceRange getBracketsRange() const { return Brackets; } 1281 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1282 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1283 1284 virtual void getAsStringInternal(std::string &InnerString, 1285 const PrintingPolicy &Policy) const; 1286 1287 static bool classof(const Type *T) { 1288 return T->getTypeClass() == ConstantArrayWithExpr; 1289 } 1290 static bool classof(const ConstantArrayWithExprType *) { return true; } 1291 1292 void Profile(llvm::FoldingSetNodeID &ID) { 1293 assert(0 && "Cannot unique ConstantArrayWithExprTypes."); 1294 } 1295}; 1296 1297/// ConstantArrayWithoutExprType - This class represents C arrays with a 1298/// constant size that was not specified by an integer constant expression, 1299/// but inferred by static semantics. 1300/// For example 'int A[] = { 0, 1, 2 }' has ConstantArrayWithoutExprType. 1301/// These types are non-canonical: the corresponding canonical type, 1302/// having the size specified in an APInt object, is a ConstantArrayType. 1303class ConstantArrayWithoutExprType : public ConstantArrayType { 1304 1305 ConstantArrayWithoutExprType(QualType et, QualType can, 1306 const llvm::APInt &size, 1307 ArraySizeModifier sm, unsigned tq) 1308 : ConstantArrayType(ConstantArrayWithoutExpr, et, can, size, sm, tq) {} 1309 friend class ASTContext; // ASTContext creates these. 1310 1311public: 1312 virtual void getAsStringInternal(std::string &InnerString, 1313 const PrintingPolicy &Policy) const; 1314 1315 static bool classof(const Type *T) { 1316 return T->getTypeClass() == ConstantArrayWithoutExpr; 1317 } 1318 static bool classof(const ConstantArrayWithoutExprType *) { return true; } 1319 1320 void Profile(llvm::FoldingSetNodeID &ID) { 1321 assert(0 && "Cannot unique ConstantArrayWithoutExprTypes."); 1322 } 1323}; 1324 1325/// IncompleteArrayType - This class represents C arrays with an unspecified 1326/// size. For example 'int A[]' has an IncompleteArrayType where the element 1327/// type is 'int' and the size is unspecified. 1328class IncompleteArrayType : public ArrayType { 1329 1330 IncompleteArrayType(QualType et, QualType can, 1331 ArraySizeModifier sm, unsigned tq) 1332 : ArrayType(IncompleteArray, et, can, sm, tq) {} 1333 friend class ASTContext; // ASTContext creates these. 1334public: 1335 virtual void getAsStringInternal(std::string &InnerString, 1336 const PrintingPolicy &Policy) const; 1337 1338 static bool classof(const Type *T) { 1339 return T->getTypeClass() == IncompleteArray; 1340 } 1341 static bool classof(const IncompleteArrayType *) { return true; } 1342 1343 friend class StmtIteratorBase; 1344 1345 void Profile(llvm::FoldingSetNodeID &ID) { 1346 Profile(ID, getElementType(), getSizeModifier(), 1347 getIndexTypeCVRQualifiers()); 1348 } 1349 1350 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1351 ArraySizeModifier SizeMod, unsigned TypeQuals) { 1352 ID.AddPointer(ET.getAsOpaquePtr()); 1353 ID.AddInteger(SizeMod); 1354 ID.AddInteger(TypeQuals); 1355 } 1356}; 1357 1358/// VariableArrayType - This class represents C arrays with a specified size 1359/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 1360/// Since the size expression is an arbitrary expression, we store it as such. 1361/// 1362/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 1363/// should not be: two lexically equivalent variable array types could mean 1364/// different things, for example, these variables do not have the same type 1365/// dynamically: 1366/// 1367/// void foo(int x) { 1368/// int Y[x]; 1369/// ++x; 1370/// int Z[x]; 1371/// } 1372/// 1373class VariableArrayType : public ArrayType { 1374 /// SizeExpr - An assignment expression. VLA's are only permitted within 1375 /// a function block. 1376 Stmt *SizeExpr; 1377 /// Brackets - The left and right array brackets. 1378 SourceRange Brackets; 1379 1380 VariableArrayType(QualType et, QualType can, Expr *e, 1381 ArraySizeModifier sm, unsigned tq, 1382 SourceRange brackets) 1383 : ArrayType(VariableArray, et, can, sm, tq), 1384 SizeExpr((Stmt*) e), Brackets(brackets) {} 1385 friend class ASTContext; // ASTContext creates these. 1386 virtual void Destroy(ASTContext& C); 1387 1388public: 1389 Expr *getSizeExpr() const { 1390 // We use C-style casts instead of cast<> here because we do not wish 1391 // to have a dependency of Type.h on Stmt.h/Expr.h. 1392 return (Expr*) SizeExpr; 1393 } 1394 SourceRange getBracketsRange() const { return Brackets; } 1395 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1396 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1397 1398 virtual void getAsStringInternal(std::string &InnerString, 1399 const PrintingPolicy &Policy) const; 1400 1401 static bool classof(const Type *T) { 1402 return T->getTypeClass() == VariableArray; 1403 } 1404 static bool classof(const VariableArrayType *) { return true; } 1405 1406 friend class StmtIteratorBase; 1407 1408 void Profile(llvm::FoldingSetNodeID &ID) { 1409 assert(0 && "Cannnot unique VariableArrayTypes."); 1410 } 1411}; 1412 1413/// DependentSizedArrayType - This type represents an array type in 1414/// C++ whose size is a value-dependent expression. For example: 1415/// @code 1416/// template<typename T, int Size> 1417/// class array { 1418/// T data[Size]; 1419/// }; 1420/// @endcode 1421/// For these types, we won't actually know what the array bound is 1422/// until template instantiation occurs, at which point this will 1423/// become either a ConstantArrayType or a VariableArrayType. 1424class DependentSizedArrayType : public ArrayType { 1425 ASTContext &Context; 1426 1427 /// SizeExpr - An assignment expression that will instantiate to the 1428 /// size of the array. 1429 Stmt *SizeExpr; 1430 /// Brackets - The left and right array brackets. 1431 SourceRange Brackets; 1432 1433 DependentSizedArrayType(ASTContext &Context, QualType et, QualType can, 1434 Expr *e, ArraySizeModifier sm, unsigned tq, 1435 SourceRange brackets) 1436 : ArrayType(DependentSizedArray, et, can, sm, tq), 1437 Context(Context), SizeExpr((Stmt*) e), Brackets(brackets) {} 1438 friend class ASTContext; // ASTContext creates these. 1439 virtual void Destroy(ASTContext& C); 1440 1441public: 1442 Expr *getSizeExpr() const { 1443 // We use C-style casts instead of cast<> here because we do not wish 1444 // to have a dependency of Type.h on Stmt.h/Expr.h. 1445 return (Expr*) SizeExpr; 1446 } 1447 SourceRange getBracketsRange() const { return Brackets; } 1448 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1449 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1450 1451 virtual void getAsStringInternal(std::string &InnerString, 1452 const PrintingPolicy &Policy) const; 1453 1454 static bool classof(const Type *T) { 1455 return T->getTypeClass() == DependentSizedArray; 1456 } 1457 static bool classof(const DependentSizedArrayType *) { return true; } 1458 1459 friend class StmtIteratorBase; 1460 1461 1462 void Profile(llvm::FoldingSetNodeID &ID) { 1463 Profile(ID, Context, getElementType(), 1464 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 1465 } 1466 1467 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1468 QualType ET, ArraySizeModifier SizeMod, 1469 unsigned TypeQuals, Expr *E); 1470}; 1471 1472/// DependentSizedExtVectorType - This type represent an extended vector type 1473/// where either the type or size is dependent. For example: 1474/// @code 1475/// template<typename T, int Size> 1476/// class vector { 1477/// typedef T __attribute__((ext_vector_type(Size))) type; 1478/// } 1479/// @endcode 1480class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 1481 ASTContext &Context; 1482 Expr *SizeExpr; 1483 /// ElementType - The element type of the array. 1484 QualType ElementType; 1485 SourceLocation loc; 1486 1487 DependentSizedExtVectorType(ASTContext &Context, QualType ElementType, 1488 QualType can, Expr *SizeExpr, SourceLocation loc) 1489 : Type (DependentSizedExtVector, can, true), 1490 Context(Context), SizeExpr(SizeExpr), ElementType(ElementType), 1491 loc(loc) {} 1492 friend class ASTContext; 1493 virtual void Destroy(ASTContext& C); 1494 1495public: 1496 Expr *getSizeExpr() const { return SizeExpr; } 1497 QualType getElementType() const { return ElementType; } 1498 SourceLocation getAttributeLoc() const { return loc; } 1499 1500 virtual void getAsStringInternal(std::string &InnerString, 1501 const PrintingPolicy &Policy) const; 1502 1503 static bool classof(const Type *T) { 1504 return T->getTypeClass() == DependentSizedExtVector; 1505 } 1506 static bool classof(const DependentSizedExtVectorType *) { return true; } 1507 1508 void Profile(llvm::FoldingSetNodeID &ID) { 1509 Profile(ID, Context, getElementType(), getSizeExpr()); 1510 } 1511 1512 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1513 QualType ElementType, Expr *SizeExpr); 1514}; 1515 1516 1517/// VectorType - GCC generic vector type. This type is created using 1518/// __attribute__((vector_size(n)), where "n" specifies the vector size in 1519/// bytes. Since the constructor takes the number of vector elements, the 1520/// client is responsible for converting the size into the number of elements. 1521class VectorType : public Type, public llvm::FoldingSetNode { 1522protected: 1523 /// ElementType - The element type of the vector. 1524 QualType ElementType; 1525 1526 /// NumElements - The number of elements in the vector. 1527 unsigned NumElements; 1528 1529 VectorType(QualType vecType, unsigned nElements, QualType canonType) : 1530 Type(Vector, canonType, vecType->isDependentType()), 1531 ElementType(vecType), NumElements(nElements) {} 1532 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 1533 QualType canonType) 1534 : Type(tc, canonType, vecType->isDependentType()), ElementType(vecType), 1535 NumElements(nElements) {} 1536 friend class ASTContext; // ASTContext creates these. 1537public: 1538 1539 QualType getElementType() const { return ElementType; } 1540 unsigned getNumElements() const { return NumElements; } 1541 1542 virtual void getAsStringInternal(std::string &InnerString, 1543 const PrintingPolicy &Policy) const; 1544 1545 void Profile(llvm::FoldingSetNodeID &ID) { 1546 Profile(ID, getElementType(), getNumElements(), getTypeClass()); 1547 } 1548 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 1549 unsigned NumElements, TypeClass TypeClass) { 1550 ID.AddPointer(ElementType.getAsOpaquePtr()); 1551 ID.AddInteger(NumElements); 1552 ID.AddInteger(TypeClass); 1553 } 1554 static bool classof(const Type *T) { 1555 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 1556 } 1557 static bool classof(const VectorType *) { return true; } 1558}; 1559 1560/// ExtVectorType - Extended vector type. This type is created using 1561/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 1562/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 1563/// class enables syntactic extensions, like Vector Components for accessing 1564/// points, colors, and textures (modeled after OpenGL Shading Language). 1565class ExtVectorType : public VectorType { 1566 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 1567 VectorType(ExtVector, vecType, nElements, canonType) {} 1568 friend class ASTContext; // ASTContext creates these. 1569public: 1570 static int getPointAccessorIdx(char c) { 1571 switch (c) { 1572 default: return -1; 1573 case 'x': return 0; 1574 case 'y': return 1; 1575 case 'z': return 2; 1576 case 'w': return 3; 1577 } 1578 } 1579 static int getNumericAccessorIdx(char c) { 1580 switch (c) { 1581 default: return -1; 1582 case '0': return 0; 1583 case '1': return 1; 1584 case '2': return 2; 1585 case '3': return 3; 1586 case '4': return 4; 1587 case '5': return 5; 1588 case '6': return 6; 1589 case '7': return 7; 1590 case '8': return 8; 1591 case '9': return 9; 1592 case 'A': 1593 case 'a': return 10; 1594 case 'B': 1595 case 'b': return 11; 1596 case 'C': 1597 case 'c': return 12; 1598 case 'D': 1599 case 'd': return 13; 1600 case 'E': 1601 case 'e': return 14; 1602 case 'F': 1603 case 'f': return 15; 1604 } 1605 } 1606 1607 static int getAccessorIdx(char c) { 1608 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 1609 return getNumericAccessorIdx(c); 1610 } 1611 1612 bool isAccessorWithinNumElements(char c) const { 1613 if (int idx = getAccessorIdx(c)+1) 1614 return unsigned(idx-1) < NumElements; 1615 return false; 1616 } 1617 virtual void getAsStringInternal(std::string &InnerString, 1618 const PrintingPolicy &Policy) const; 1619 1620 static bool classof(const Type *T) { 1621 return T->getTypeClass() == ExtVector; 1622 } 1623 static bool classof(const ExtVectorType *) { return true; } 1624}; 1625 1626/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 1627/// class of FunctionNoProtoType and FunctionProtoType. 1628/// 1629class FunctionType : public Type { 1630 /// SubClassData - This field is owned by the subclass, put here to pack 1631 /// tightly with the ivars in Type. 1632 bool SubClassData : 1; 1633 1634 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1635 /// other bitfields. 1636 /// The qualifiers are part of FunctionProtoType because... 1637 /// 1638 /// C++ 8.3.5p4: The return type, the parameter type list and the 1639 /// cv-qualifier-seq, [...], are part of the function type. 1640 /// 1641 unsigned TypeQuals : 3; 1642 1643 /// NoReturn - Indicates if the function type is attribute noreturn. 1644 unsigned NoReturn : 1; 1645 1646 // The type returned by the function. 1647 QualType ResultType; 1648protected: 1649 FunctionType(TypeClass tc, QualType res, bool SubclassInfo, 1650 unsigned typeQuals, QualType Canonical, bool Dependent, 1651 bool noReturn = false) 1652 : Type(tc, Canonical, Dependent), 1653 SubClassData(SubclassInfo), TypeQuals(typeQuals), NoReturn(noReturn), 1654 ResultType(res) {} 1655 bool getSubClassData() const { return SubClassData; } 1656 unsigned getTypeQuals() const { return TypeQuals; } 1657public: 1658 1659 QualType getResultType() const { return ResultType; } 1660 bool getNoReturnAttr() const { return NoReturn; } 1661 1662 1663 static bool classof(const Type *T) { 1664 return T->getTypeClass() == FunctionNoProto || 1665 T->getTypeClass() == FunctionProto; 1666 } 1667 static bool classof(const FunctionType *) { return true; } 1668}; 1669 1670/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 1671/// no information available about its arguments. 1672class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 1673 FunctionNoProtoType(QualType Result, QualType Canonical, 1674 bool NoReturn = false) 1675 : FunctionType(FunctionNoProto, Result, false, 0, Canonical, 1676 /*Dependent=*/false, NoReturn) {} 1677 friend class ASTContext; // ASTContext creates these. 1678public: 1679 // No additional state past what FunctionType provides. 1680 1681 virtual void getAsStringInternal(std::string &InnerString, 1682 const PrintingPolicy &Policy) const; 1683 1684 void Profile(llvm::FoldingSetNodeID &ID) { 1685 Profile(ID, getResultType(), getNoReturnAttr()); 1686 } 1687 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 1688 bool NoReturn) { 1689 ID.AddInteger(NoReturn); 1690 ID.AddPointer(ResultType.getAsOpaquePtr()); 1691 } 1692 1693 static bool classof(const Type *T) { 1694 return T->getTypeClass() == FunctionNoProto; 1695 } 1696 static bool classof(const FunctionNoProtoType *) { return true; } 1697}; 1698 1699/// FunctionProtoType - Represents a prototype with argument type info, e.g. 1700/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 1701/// arguments, not as having a single void argument. Such a type can have an 1702/// exception specification, but this specification is not part of the canonical 1703/// type. 1704class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 1705 /// hasAnyDependentType - Determine whether there are any dependent 1706 /// types within the arguments passed in. 1707 static bool hasAnyDependentType(const QualType *ArgArray, unsigned numArgs) { 1708 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 1709 if (ArgArray[Idx]->isDependentType()) 1710 return true; 1711 1712 return false; 1713 } 1714 1715 FunctionProtoType(QualType Result, const QualType *ArgArray, unsigned numArgs, 1716 bool isVariadic, unsigned typeQuals, bool hasExs, 1717 bool hasAnyExs, const QualType *ExArray, 1718 unsigned numExs, QualType Canonical, bool NoReturn) 1719 : FunctionType(FunctionProto, Result, isVariadic, typeQuals, Canonical, 1720 (Result->isDependentType() || 1721 hasAnyDependentType(ArgArray, numArgs)), NoReturn), 1722 NumArgs(numArgs), NumExceptions(numExs), HasExceptionSpec(hasExs), 1723 AnyExceptionSpec(hasAnyExs) { 1724 // Fill in the trailing argument array. 1725 QualType *ArgInfo = reinterpret_cast<QualType*>(this+1); 1726 for (unsigned i = 0; i != numArgs; ++i) 1727 ArgInfo[i] = ArgArray[i]; 1728 // Fill in the exception array. 1729 QualType *Ex = ArgInfo + numArgs; 1730 for (unsigned i = 0; i != numExs; ++i) 1731 Ex[i] = ExArray[i]; 1732 } 1733 1734 /// NumArgs - The number of arguments this function has, not counting '...'. 1735 unsigned NumArgs : 20; 1736 1737 /// NumExceptions - The number of types in the exception spec, if any. 1738 unsigned NumExceptions : 10; 1739 1740 /// HasExceptionSpec - Whether this function has an exception spec at all. 1741 bool HasExceptionSpec : 1; 1742 1743 /// AnyExceptionSpec - Whether this function has a throw(...) spec. 1744 bool AnyExceptionSpec : 1; 1745 1746 /// ArgInfo - There is an variable size array after the class in memory that 1747 /// holds the argument types. 1748 1749 /// Exceptions - There is another variable size array after ArgInfo that 1750 /// holds the exception types. 1751 1752 friend class ASTContext; // ASTContext creates these. 1753 1754public: 1755 unsigned getNumArgs() const { return NumArgs; } 1756 QualType getArgType(unsigned i) const { 1757 assert(i < NumArgs && "Invalid argument number!"); 1758 return arg_type_begin()[i]; 1759 } 1760 1761 bool hasExceptionSpec() const { return HasExceptionSpec; } 1762 bool hasAnyExceptionSpec() const { return AnyExceptionSpec; } 1763 unsigned getNumExceptions() const { return NumExceptions; } 1764 QualType getExceptionType(unsigned i) const { 1765 assert(i < NumExceptions && "Invalid exception number!"); 1766 return exception_begin()[i]; 1767 } 1768 bool hasEmptyExceptionSpec() const { 1769 return hasExceptionSpec() && !hasAnyExceptionSpec() && 1770 getNumExceptions() == 0; 1771 } 1772 1773 bool isVariadic() const { return getSubClassData(); } 1774 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 1775 1776 typedef const QualType *arg_type_iterator; 1777 arg_type_iterator arg_type_begin() const { 1778 return reinterpret_cast<const QualType *>(this+1); 1779 } 1780 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 1781 1782 typedef const QualType *exception_iterator; 1783 exception_iterator exception_begin() const { 1784 // exceptions begin where arguments end 1785 return arg_type_end(); 1786 } 1787 exception_iterator exception_end() const { 1788 return exception_begin() + NumExceptions; 1789 } 1790 1791 virtual void getAsStringInternal(std::string &InnerString, 1792 const PrintingPolicy &Policy) const; 1793 1794 static bool classof(const Type *T) { 1795 return T->getTypeClass() == FunctionProto; 1796 } 1797 static bool classof(const FunctionProtoType *) { return true; } 1798 1799 void Profile(llvm::FoldingSetNodeID &ID); 1800 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 1801 arg_type_iterator ArgTys, unsigned NumArgs, 1802 bool isVariadic, unsigned TypeQuals, 1803 bool hasExceptionSpec, bool anyExceptionSpec, 1804 unsigned NumExceptions, exception_iterator Exs, 1805 bool NoReturn); 1806}; 1807 1808 1809class TypedefType : public Type { 1810 TypedefDecl *Decl; 1811protected: 1812 TypedefType(TypeClass tc, TypedefDecl *D, QualType can) 1813 : Type(tc, can, can->isDependentType()), Decl(D) { 1814 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1815 } 1816 friend class ASTContext; // ASTContext creates these. 1817public: 1818 1819 TypedefDecl *getDecl() const { return Decl; } 1820 1821 /// LookThroughTypedefs - Return the ultimate type this typedef corresponds to 1822 /// potentially looking through *all* consecutive typedefs. This returns the 1823 /// sum of the type qualifiers, so if you have: 1824 /// typedef const int A; 1825 /// typedef volatile A B; 1826 /// looking through the typedefs for B will give you "const volatile A". 1827 QualType LookThroughTypedefs() const; 1828 1829 virtual void getAsStringInternal(std::string &InnerString, 1830 const PrintingPolicy &Policy) const; 1831 1832 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 1833 static bool classof(const TypedefType *) { return true; } 1834}; 1835 1836/// TypeOfExprType (GCC extension). 1837class TypeOfExprType : public Type { 1838 Expr *TOExpr; 1839 1840protected: 1841 TypeOfExprType(Expr *E, QualType can = QualType()); 1842 friend class ASTContext; // ASTContext creates these. 1843public: 1844 Expr *getUnderlyingExpr() const { return TOExpr; } 1845 1846 virtual void getAsStringInternal(std::string &InnerString, 1847 const PrintingPolicy &Policy) const; 1848 1849 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 1850 static bool classof(const TypeOfExprType *) { return true; } 1851}; 1852 1853/// Subclass of TypeOfExprType that is used for canonical, dependent 1854/// typeof(expr) types. 1855class DependentTypeOfExprType 1856 : public TypeOfExprType, public llvm::FoldingSetNode { 1857 ASTContext &Context; 1858 1859public: 1860 DependentTypeOfExprType(ASTContext &Context, Expr *E) 1861 : TypeOfExprType(E), Context(Context) { } 1862 1863 void Profile(llvm::FoldingSetNodeID &ID) { 1864 Profile(ID, Context, getUnderlyingExpr()); 1865 } 1866 1867 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1868 Expr *E); 1869}; 1870 1871/// TypeOfType (GCC extension). 1872class TypeOfType : public Type { 1873 QualType TOType; 1874 TypeOfType(QualType T, QualType can) 1875 : Type(TypeOf, can, T->isDependentType()), TOType(T) { 1876 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1877 } 1878 friend class ASTContext; // ASTContext creates these. 1879public: 1880 QualType getUnderlyingType() const { return TOType; } 1881 1882 virtual void getAsStringInternal(std::string &InnerString, 1883 const PrintingPolicy &Policy) const; 1884 1885 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 1886 static bool classof(const TypeOfType *) { return true; } 1887}; 1888 1889/// DecltypeType (C++0x) 1890class DecltypeType : public Type { 1891 Expr *E; 1892 1893 // FIXME: We could get rid of UnderlyingType if we wanted to: We would have to 1894 // Move getDesugaredType to ASTContext so that it can call getDecltypeForExpr 1895 // from it. 1896 QualType UnderlyingType; 1897 1898protected: 1899 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 1900 friend class ASTContext; // ASTContext creates these. 1901public: 1902 Expr *getUnderlyingExpr() const { return E; } 1903 QualType getUnderlyingType() const { return UnderlyingType; } 1904 1905 virtual void getAsStringInternal(std::string &InnerString, 1906 const PrintingPolicy &Policy) const; 1907 1908 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 1909 static bool classof(const DecltypeType *) { return true; } 1910}; 1911 1912/// Subclass of DecltypeType that is used for canonical, dependent 1913/// C++0x decltype types. 1914class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 1915 ASTContext &Context; 1916 1917public: 1918 DependentDecltypeType(ASTContext &Context, Expr *E); 1919 1920 void Profile(llvm::FoldingSetNodeID &ID) { 1921 Profile(ID, Context, getUnderlyingExpr()); 1922 } 1923 1924 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1925 Expr *E); 1926}; 1927 1928class TagType : public Type { 1929 /// Stores the TagDecl associated with this type. The decl will 1930 /// point to the TagDecl that actually defines the entity (or is a 1931 /// definition in progress), if there is such a definition. The 1932 /// single-bit value will be non-zero when this tag is in the 1933 /// process of being defined. 1934 mutable llvm::PointerIntPair<TagDecl *, 1> decl; 1935 friend class ASTContext; 1936 friend class TagDecl; 1937 1938protected: 1939 TagType(TypeClass TC, TagDecl *D, QualType can); 1940 1941public: 1942 TagDecl *getDecl() const { return decl.getPointer(); } 1943 1944 /// @brief Determines whether this type is in the process of being 1945 /// defined. 1946 bool isBeingDefined() const { return decl.getInt(); } 1947 void setBeingDefined(bool Def) const { decl.setInt(Def? 1 : 0); } 1948 1949 virtual void getAsStringInternal(std::string &InnerString, 1950 const PrintingPolicy &Policy) const; 1951 1952 static bool classof(const Type *T) { 1953 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 1954 } 1955 static bool classof(const TagType *) { return true; } 1956 static bool classof(const RecordType *) { return true; } 1957 static bool classof(const EnumType *) { return true; } 1958}; 1959 1960/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 1961/// to detect TagType objects of structs/unions/classes. 1962class RecordType : public TagType { 1963protected: 1964 explicit RecordType(RecordDecl *D) 1965 : TagType(Record, reinterpret_cast<TagDecl*>(D), QualType()) { } 1966 explicit RecordType(TypeClass TC, RecordDecl *D) 1967 : TagType(TC, reinterpret_cast<TagDecl*>(D), QualType()) { } 1968 friend class ASTContext; // ASTContext creates these. 1969public: 1970 1971 RecordDecl *getDecl() const { 1972 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 1973 } 1974 1975 // FIXME: This predicate is a helper to QualType/Type. It needs to 1976 // recursively check all fields for const-ness. If any field is declared 1977 // const, it needs to return false. 1978 bool hasConstFields() const { return false; } 1979 1980 // FIXME: RecordType needs to check when it is created that all fields are in 1981 // the same address space, and return that. 1982 unsigned getAddressSpace() const { return 0; } 1983 1984 static bool classof(const TagType *T); 1985 static bool classof(const Type *T) { 1986 return isa<TagType>(T) && classof(cast<TagType>(T)); 1987 } 1988 static bool classof(const RecordType *) { return true; } 1989}; 1990 1991/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 1992/// to detect TagType objects of enums. 1993class EnumType : public TagType { 1994 explicit EnumType(EnumDecl *D) 1995 : TagType(Enum, reinterpret_cast<TagDecl*>(D), QualType()) { } 1996 friend class ASTContext; // ASTContext creates these. 1997public: 1998 1999 EnumDecl *getDecl() const { 2000 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 2001 } 2002 2003 static bool classof(const TagType *T); 2004 static bool classof(const Type *T) { 2005 return isa<TagType>(T) && classof(cast<TagType>(T)); 2006 } 2007 static bool classof(const EnumType *) { return true; } 2008}; 2009 2010/// ElaboratedType - A non-canonical type used to represents uses of 2011/// elaborated type specifiers in C++. For example: 2012/// 2013/// void foo(union MyUnion); 2014/// ^^^^^^^^^^^^^ 2015/// 2016/// At the moment, for efficiency we do not create elaborated types in 2017/// C, since outside of typedefs all references to structs would 2018/// necessarily be elaborated. 2019class ElaboratedType : public Type, public llvm::FoldingSetNode { 2020public: 2021 enum TagKind { 2022 TK_struct, 2023 TK_union, 2024 TK_class, 2025 TK_enum 2026 }; 2027 2028private: 2029 /// The tag that was used in this elaborated type specifier. 2030 TagKind Tag; 2031 2032 /// The underlying type. 2033 QualType UnderlyingType; 2034 2035 explicit ElaboratedType(QualType Ty, TagKind Tag, QualType Canon) 2036 : Type(Elaborated, Canon, Canon->isDependentType()), 2037 Tag(Tag), UnderlyingType(Ty) { } 2038 friend class ASTContext; // ASTContext creates these. 2039 2040public: 2041 TagKind getTagKind() const { return Tag; } 2042 QualType getUnderlyingType() const { return UnderlyingType; } 2043 2044 static const char *getNameForTagKind(TagKind Kind) { 2045 switch (Kind) { 2046 default: assert(0 && "Unknown TagKind!"); 2047 case TK_struct: return "struct"; 2048 case TK_union: return "union"; 2049 case TK_class: return "class"; 2050 case TK_enum: return "enum"; 2051 } 2052 } 2053 2054 virtual void getAsStringInternal(std::string &InnerString, 2055 const PrintingPolicy &Policy) const; 2056 2057 void Profile(llvm::FoldingSetNodeID &ID) { 2058 Profile(ID, getUnderlyingType(), getTagKind()); 2059 } 2060 static void Profile(llvm::FoldingSetNodeID &ID, QualType T, TagKind Tag) { 2061 ID.AddPointer(T.getAsOpaquePtr()); 2062 ID.AddInteger(Tag); 2063 } 2064 2065 static bool classof(const ElaboratedType*) { return true; } 2066 static bool classof(const Type *T) { return T->getTypeClass() == Elaborated; } 2067}; 2068 2069class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2070 unsigned Depth : 15; 2071 unsigned Index : 16; 2072 unsigned ParameterPack : 1; 2073 IdentifierInfo *Name; 2074 2075 TemplateTypeParmType(unsigned D, unsigned I, bool PP, IdentifierInfo *N, 2076 QualType Canon) 2077 : Type(TemplateTypeParm, Canon, /*Dependent=*/true), 2078 Depth(D), Index(I), ParameterPack(PP), Name(N) { } 2079 2080 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 2081 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true), 2082 Depth(D), Index(I), ParameterPack(PP), Name(0) { } 2083 2084 friend class ASTContext; // ASTContext creates these 2085 2086public: 2087 unsigned getDepth() const { return Depth; } 2088 unsigned getIndex() const { return Index; } 2089 bool isParameterPack() const { return ParameterPack; } 2090 IdentifierInfo *getName() const { return Name; } 2091 2092 virtual void getAsStringInternal(std::string &InnerString, 2093 const PrintingPolicy &Policy) const; 2094 2095 void Profile(llvm::FoldingSetNodeID &ID) { 2096 Profile(ID, Depth, Index, ParameterPack, Name); 2097 } 2098 2099 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 2100 unsigned Index, bool ParameterPack, 2101 IdentifierInfo *Name) { 2102 ID.AddInteger(Depth); 2103 ID.AddInteger(Index); 2104 ID.AddBoolean(ParameterPack); 2105 ID.AddPointer(Name); 2106 } 2107 2108 static bool classof(const Type *T) { 2109 return T->getTypeClass() == TemplateTypeParm; 2110 } 2111 static bool classof(const TemplateTypeParmType *T) { return true; } 2112}; 2113 2114/// \brief Represents the type of a template specialization as written 2115/// in the source code. 2116/// 2117/// Template specialization types represent the syntactic form of a 2118/// template-id that refers to a type, e.g., @c vector<int>. Some 2119/// template specialization types are syntactic sugar, whose canonical 2120/// type will point to some other type node that represents the 2121/// instantiation or class template specialization. For example, a 2122/// class template specialization type of @c vector<int> will refer to 2123/// a tag type for the instantiation 2124/// @c std::vector<int, std::allocator<int>>. 2125/// 2126/// Other template specialization types, for which the template name 2127/// is dependent, may be canonical types. These types are always 2128/// dependent. 2129class TemplateSpecializationType 2130 : public Type, public llvm::FoldingSetNode { 2131 2132 // FIXME: Currently needed for profiling expressions; can we avoid this? 2133 ASTContext &Context; 2134 2135 /// \brief The name of the template being specialized. 2136 TemplateName Template; 2137 2138 /// \brief - The number of template arguments named in this class 2139 /// template specialization. 2140 unsigned NumArgs; 2141 2142 TemplateSpecializationType(ASTContext &Context, 2143 TemplateName T, 2144 const TemplateArgument *Args, 2145 unsigned NumArgs, QualType Canon); 2146 2147 virtual void Destroy(ASTContext& C); 2148 2149 friend class ASTContext; // ASTContext creates these 2150 2151public: 2152 /// \brief Determine whether any of the given template arguments are 2153 /// dependent. 2154 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 2155 unsigned NumArgs); 2156 2157 /// \brief Print a template argument list, including the '<' and '>' 2158 /// enclosing the template arguments. 2159 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 2160 unsigned NumArgs, 2161 const PrintingPolicy &Policy); 2162 2163 typedef const TemplateArgument * iterator; 2164 2165 iterator begin() const { return getArgs(); } 2166 iterator end() const; 2167 2168 /// \brief Retrieve the name of the template that we are specializing. 2169 TemplateName getTemplateName() const { return Template; } 2170 2171 /// \brief Retrieve the template arguments. 2172 const TemplateArgument *getArgs() const { 2173 return reinterpret_cast<const TemplateArgument *>(this + 1); 2174 } 2175 2176 /// \brief Retrieve the number of template arguments. 2177 unsigned getNumArgs() const { return NumArgs; } 2178 2179 /// \brief Retrieve a specific template argument as a type. 2180 /// \precondition @c isArgType(Arg) 2181 const TemplateArgument &getArg(unsigned Idx) const; 2182 2183 virtual void getAsStringInternal(std::string &InnerString, 2184 const PrintingPolicy &Policy) const; 2185 2186 void Profile(llvm::FoldingSetNodeID &ID) { 2187 Profile(ID, Template, getArgs(), NumArgs, Context); 2188 } 2189 2190 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 2191 const TemplateArgument *Args, unsigned NumArgs, 2192 ASTContext &Context); 2193 2194 static bool classof(const Type *T) { 2195 return T->getTypeClass() == TemplateSpecialization; 2196 } 2197 static bool classof(const TemplateSpecializationType *T) { return true; } 2198}; 2199 2200/// \brief Represents a type that was referred to via a qualified 2201/// name, e.g., N::M::type. 2202/// 2203/// This type is used to keep track of a type name as written in the 2204/// source code, including any nested-name-specifiers. The type itself 2205/// is always "sugar", used to express what was written in the source 2206/// code but containing no additional semantic information. 2207class QualifiedNameType : public Type, public llvm::FoldingSetNode { 2208 /// \brief The nested name specifier containing the qualifier. 2209 NestedNameSpecifier *NNS; 2210 2211 /// \brief The type that this qualified name refers to. 2212 QualType NamedType; 2213 2214 QualifiedNameType(NestedNameSpecifier *NNS, QualType NamedType, 2215 QualType CanonType) 2216 : Type(QualifiedName, CanonType, NamedType->isDependentType()), 2217 NNS(NNS), NamedType(NamedType) { } 2218 2219 friend class ASTContext; // ASTContext creates these 2220 2221public: 2222 /// \brief Retrieve the qualification on this type. 2223 NestedNameSpecifier *getQualifier() const { return NNS; } 2224 2225 /// \brief Retrieve the type named by the qualified-id. 2226 QualType getNamedType() const { return NamedType; } 2227 2228 virtual void getAsStringInternal(std::string &InnerString, 2229 const PrintingPolicy &Policy) const; 2230 2231 void Profile(llvm::FoldingSetNodeID &ID) { 2232 Profile(ID, NNS, NamedType); 2233 } 2234 2235 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 2236 QualType NamedType) { 2237 ID.AddPointer(NNS); 2238 NamedType.Profile(ID); 2239 } 2240 2241 static bool classof(const Type *T) { 2242 return T->getTypeClass() == QualifiedName; 2243 } 2244 static bool classof(const QualifiedNameType *T) { return true; } 2245}; 2246 2247/// \brief Represents a 'typename' specifier that names a type within 2248/// a dependent type, e.g., "typename T::type". 2249/// 2250/// TypenameType has a very similar structure to QualifiedNameType, 2251/// which also involves a nested-name-specifier following by a type, 2252/// and (FIXME!) both can even be prefixed by the 'typename' 2253/// keyword. However, the two types serve very different roles: 2254/// QualifiedNameType is a non-semantic type that serves only as sugar 2255/// to show how a particular type was written in the source 2256/// code. TypenameType, on the other hand, only occurs when the 2257/// nested-name-specifier is dependent, such that we cannot resolve 2258/// the actual type until after instantiation. 2259class TypenameType : public Type, public llvm::FoldingSetNode { 2260 /// \brief The nested name specifier containing the qualifier. 2261 NestedNameSpecifier *NNS; 2262 2263 typedef llvm::PointerUnion<const IdentifierInfo *, 2264 const TemplateSpecializationType *> NameType; 2265 2266 /// \brief The type that this typename specifier refers to. 2267 NameType Name; 2268 2269 TypenameType(NestedNameSpecifier *NNS, const IdentifierInfo *Name, 2270 QualType CanonType) 2271 : Type(Typename, CanonType, true), NNS(NNS), Name(Name) { 2272 assert(NNS->isDependent() && 2273 "TypenameType requires a dependent nested-name-specifier"); 2274 } 2275 2276 TypenameType(NestedNameSpecifier *NNS, const TemplateSpecializationType *Ty, 2277 QualType CanonType) 2278 : Type(Typename, CanonType, true), NNS(NNS), Name(Ty) { 2279 assert(NNS->isDependent() && 2280 "TypenameType requires a dependent nested-name-specifier"); 2281 } 2282 2283 friend class ASTContext; // ASTContext creates these 2284 2285public: 2286 /// \brief Retrieve the qualification on this type. 2287 NestedNameSpecifier *getQualifier() const { return NNS; } 2288 2289 /// \brief Retrieve the type named by the typename specifier as an 2290 /// identifier. 2291 /// 2292 /// This routine will return a non-NULL identifier pointer when the 2293 /// form of the original typename was terminated by an identifier, 2294 /// e.g., "typename T::type". 2295 const IdentifierInfo *getIdentifier() const { 2296 return Name.dyn_cast<const IdentifierInfo *>(); 2297 } 2298 2299 /// \brief Retrieve the type named by the typename specifier as a 2300 /// type specialization. 2301 const TemplateSpecializationType *getTemplateId() const { 2302 return Name.dyn_cast<const TemplateSpecializationType *>(); 2303 } 2304 2305 virtual void getAsStringInternal(std::string &InnerString, 2306 const PrintingPolicy &Policy) const; 2307 2308 void Profile(llvm::FoldingSetNodeID &ID) { 2309 Profile(ID, NNS, Name); 2310 } 2311 2312 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 2313 NameType Name) { 2314 ID.AddPointer(NNS); 2315 ID.AddPointer(Name.getOpaqueValue()); 2316 } 2317 2318 static bool classof(const Type *T) { 2319 return T->getTypeClass() == Typename; 2320 } 2321 static bool classof(const TypenameType *T) { return true; } 2322}; 2323 2324/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 2325/// object oriented design. They basically correspond to C++ classes. There 2326/// are two kinds of interface types, normal interfaces like "NSString" and 2327/// qualified interfaces, which are qualified with a protocol list like 2328/// "NSString<NSCopyable, NSAmazing>". 2329class ObjCInterfaceType : public Type, public llvm::FoldingSetNode { 2330 ObjCInterfaceDecl *Decl; 2331 2332 // List of protocols for this protocol conforming object type 2333 // List is sorted on protocol name. No protocol is enterred more than once. 2334 llvm::SmallVector<ObjCProtocolDecl*, 4> Protocols; 2335 2336 ObjCInterfaceType(ObjCInterfaceDecl *D, 2337 ObjCProtocolDecl **Protos, unsigned NumP) : 2338 Type(ObjCInterface, QualType(), /*Dependent=*/false), 2339 Decl(D), Protocols(Protos, Protos+NumP) { } 2340 friend class ASTContext; // ASTContext creates these. 2341public: 2342 ObjCInterfaceDecl *getDecl() const { return Decl; } 2343 2344 /// getNumProtocols - Return the number of qualifying protocols in this 2345 /// interface type, or 0 if there are none. 2346 unsigned getNumProtocols() const { return Protocols.size(); } 2347 2348 /// qual_iterator and friends: this provides access to the (potentially empty) 2349 /// list of protocols qualifying this interface. 2350 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 2351 qual_iterator qual_begin() const { return Protocols.begin(); } 2352 qual_iterator qual_end() const { return Protocols.end(); } 2353 bool qual_empty() const { return Protocols.size() == 0; } 2354 2355 virtual void getAsStringInternal(std::string &InnerString, 2356 const PrintingPolicy &Policy) const; 2357 2358 void Profile(llvm::FoldingSetNodeID &ID); 2359 static void Profile(llvm::FoldingSetNodeID &ID, 2360 const ObjCInterfaceDecl *Decl, 2361 ObjCProtocolDecl **protocols, unsigned NumProtocols); 2362 2363 static bool classof(const Type *T) { 2364 return T->getTypeClass() == ObjCInterface; 2365 } 2366 static bool classof(const ObjCInterfaceType *) { return true; } 2367}; 2368 2369/// ObjCObjectPointerType - Used to represent 'id', 'Interface *', 'id <p>', 2370/// and 'Interface <p> *'. 2371/// 2372/// Duplicate protocols are removed and protocol list is canonicalized to be in 2373/// alphabetical order. 2374class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 2375 QualType PointeeType; // A builtin or interface type. 2376 2377 // List of protocols for this protocol conforming object type 2378 // List is sorted on protocol name. No protocol is entered more than once. 2379 llvm::SmallVector<ObjCProtocolDecl*, 8> Protocols; 2380 2381 ObjCObjectPointerType(QualType T, ObjCProtocolDecl **Protos, unsigned NumP) : 2382 Type(ObjCObjectPointer, QualType(), /*Dependent=*/false), 2383 PointeeType(T), Protocols(Protos, Protos+NumP) { } 2384 friend class ASTContext; // ASTContext creates these. 2385 2386public: 2387 // Get the pointee type. Pointee will either be: 2388 // - a built-in type (for 'id' and 'Class'). 2389 // - an interface type (for user-defined types). 2390 // - a TypedefType whose canonical type is an interface (as in 'T' below). 2391 // For example: typedef NSObject T; T *var; 2392 QualType getPointeeType() const { return PointeeType; } 2393 2394 const ObjCInterfaceType *getInterfaceType() const { 2395 return PointeeType->getAs<ObjCInterfaceType>(); 2396 } 2397 /// getInterfaceDecl - returns an interface decl for user-defined types. 2398 ObjCInterfaceDecl *getInterfaceDecl() const { 2399 return getInterfaceType() ? getInterfaceType()->getDecl() : 0; 2400 } 2401 /// isObjCIdType - true for "id". 2402 bool isObjCIdType() const { 2403 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCId) && 2404 !Protocols.size(); 2405 } 2406 /// isObjCClassType - true for "Class". 2407 bool isObjCClassType() const { 2408 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCClass) && 2409 !Protocols.size(); 2410 } 2411 /// isObjCQualifiedIdType - true for "id <p>". 2412 bool isObjCQualifiedIdType() const { 2413 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCId) && 2414 Protocols.size(); 2415 } 2416 /// isObjCQualifiedClassType - true for "Class <p>". 2417 bool isObjCQualifiedClassType() const { 2418 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCClass) && 2419 Protocols.size(); 2420 } 2421 /// qual_iterator and friends: this provides access to the (potentially empty) 2422 /// list of protocols qualifying this interface. 2423 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 2424 2425 qual_iterator qual_begin() const { return Protocols.begin(); } 2426 qual_iterator qual_end() const { return Protocols.end(); } 2427 bool qual_empty() const { return Protocols.size() == 0; } 2428 2429 /// getNumProtocols - Return the number of qualifying protocols in this 2430 /// interface type, or 0 if there are none. 2431 unsigned getNumProtocols() const { return Protocols.size(); } 2432 2433 void Profile(llvm::FoldingSetNodeID &ID); 2434 static void Profile(llvm::FoldingSetNodeID &ID, QualType T, 2435 ObjCProtocolDecl **protocols, unsigned NumProtocols); 2436 virtual void getAsStringInternal(std::string &InnerString, 2437 const PrintingPolicy &Policy) const; 2438 static bool classof(const Type *T) { 2439 return T->getTypeClass() == ObjCObjectPointer; 2440 } 2441 static bool classof(const ObjCObjectPointerType *) { return true; } 2442}; 2443 2444/// A qualifier set is used to build a set of qualifiers. 2445class QualifierCollector : public Qualifiers { 2446 ASTContext *Context; 2447 2448public: 2449 QualifierCollector(Qualifiers Qs = Qualifiers()) 2450 : Qualifiers(Qs), Context(0) {} 2451 QualifierCollector(ASTContext &Context, Qualifiers Qs = Qualifiers()) 2452 : Qualifiers(Qs), Context(&Context) {} 2453 2454 void setContext(ASTContext &C) { Context = &C; } 2455 2456 /// Collect any qualifiers on the given type and return an 2457 /// unqualified type. 2458 const Type *strip(QualType QT) { 2459 addFastQualifiers(QT.getFastQualifiers()); 2460 if (QT.hasNonFastQualifiers()) { 2461 const ExtQuals *EQ = QT.getExtQualsUnsafe(); 2462 Context = &EQ->getContext(); 2463 addQualifiers(EQ->getQualifiers()); 2464 return EQ->getBaseType(); 2465 } 2466 return QT.getTypePtrUnsafe(); 2467 } 2468 2469 /// Apply the collected qualifiers to the given type. 2470 QualType apply(QualType QT) const; 2471 2472 /// Apply the collected qualifiers to the given type. 2473 QualType apply(const Type* T) const; 2474 2475}; 2476 2477 2478// Inline function definitions. 2479 2480inline void QualType::removeConst() { 2481 removeFastQualifiers(Qualifiers::Const); 2482} 2483 2484inline void QualType::removeRestrict() { 2485 removeFastQualifiers(Qualifiers::Restrict); 2486} 2487 2488inline void QualType::removeVolatile() { 2489 QualifierCollector Qc; 2490 const Type *Ty = Qc.strip(*this); 2491 if (Qc.hasVolatile()) { 2492 Qc.removeVolatile(); 2493 *this = Qc.apply(Ty); 2494 } 2495} 2496 2497inline void QualType::removeCVRQualifiers(unsigned Mask) { 2498 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 2499 2500 // Fast path: we don't need to touch the slow qualifiers. 2501 if (!(Mask & ~Qualifiers::FastMask)) { 2502 removeFastQualifiers(Mask); 2503 return; 2504 } 2505 2506 QualifierCollector Qc; 2507 const Type *Ty = Qc.strip(*this); 2508 Qc.removeCVRQualifiers(Mask); 2509 *this = Qc.apply(Ty); 2510} 2511 2512/// getAddressSpace - Return the address space of this type. 2513inline unsigned QualType::getAddressSpace() const { 2514 if (hasNonFastQualifiers()) { 2515 const ExtQuals *EQ = getExtQualsUnsafe(); 2516 if (EQ->hasAddressSpace()) 2517 return EQ->getAddressSpace(); 2518 } 2519 2520 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2521 if (CT.hasNonFastQualifiers()) { 2522 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 2523 if (EQ->hasAddressSpace()) 2524 return EQ->getAddressSpace(); 2525 } 2526 2527 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 2528 return AT->getElementType().getAddressSpace(); 2529 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 2530 return RT->getAddressSpace(); 2531 return 0; 2532} 2533 2534/// getObjCGCAttr - Return the gc attribute of this type. 2535inline Qualifiers::GC QualType::getObjCGCAttr() const { 2536 if (hasNonFastQualifiers()) { 2537 const ExtQuals *EQ = getExtQualsUnsafe(); 2538 if (EQ->hasObjCGCAttr()) 2539 return EQ->getObjCGCAttr(); 2540 } 2541 2542 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2543 if (CT.hasNonFastQualifiers()) { 2544 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 2545 if (EQ->hasObjCGCAttr()) 2546 return EQ->getObjCGCAttr(); 2547 } 2548 2549 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 2550 return AT->getElementType().getObjCGCAttr(); 2551 if (const ObjCObjectPointerType *PT = CT->getAs<ObjCObjectPointerType>()) 2552 return PT->getPointeeType().getObjCGCAttr(); 2553 // We most look at all pointer types, not just pointer to interface types. 2554 if (const PointerType *PT = CT->getAs<PointerType>()) 2555 return PT->getPointeeType().getObjCGCAttr(); 2556 return Qualifiers::GCNone; 2557} 2558 2559 /// getNoReturnAttr - Returns true if the type has the noreturn attribute, 2560 /// false otherwise. 2561inline bool QualType::getNoReturnAttr() const { 2562 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2563 if (const PointerType *PT = getTypePtr()->getAs<PointerType>()) { 2564 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 2565 return FT->getNoReturnAttr(); 2566 } else if (const FunctionType *FT = getTypePtr()->getAs<FunctionType>()) 2567 return FT->getNoReturnAttr(); 2568 2569 return false; 2570} 2571 2572/// isMoreQualifiedThan - Determine whether this type is more 2573/// qualified than the Other type. For example, "const volatile int" 2574/// is more qualified than "const int", "volatile int", and 2575/// "int". However, it is not more qualified than "const volatile 2576/// int". 2577inline bool QualType::isMoreQualifiedThan(QualType Other) const { 2578 // FIXME: work on arbitrary qualifiers 2579 unsigned MyQuals = this->getCVRQualifiers(); 2580 unsigned OtherQuals = Other.getCVRQualifiers(); 2581 if (getAddressSpace() != Other.getAddressSpace()) 2582 return false; 2583 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 2584} 2585 2586/// isAtLeastAsQualifiedAs - Determine whether this type is at last 2587/// as qualified as the Other type. For example, "const volatile 2588/// int" is at least as qualified as "const int", "volatile int", 2589/// "int", and "const volatile int". 2590inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 2591 // FIXME: work on arbitrary qualifiers 2592 unsigned MyQuals = this->getCVRQualifiers(); 2593 unsigned OtherQuals = Other.getCVRQualifiers(); 2594 if (getAddressSpace() != Other.getAddressSpace()) 2595 return false; 2596 return (MyQuals | OtherQuals) == MyQuals; 2597} 2598 2599/// getNonReferenceType - If Type is a reference type (e.g., const 2600/// int&), returns the type that the reference refers to ("const 2601/// int"). Otherwise, returns the type itself. This routine is used 2602/// throughout Sema to implement C++ 5p6: 2603/// 2604/// If an expression initially has the type "reference to T" (8.3.2, 2605/// 8.5.3), the type is adjusted to "T" prior to any further 2606/// analysis, the expression designates the object or function 2607/// denoted by the reference, and the expression is an lvalue. 2608inline QualType QualType::getNonReferenceType() const { 2609 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 2610 return RefType->getPointeeType(); 2611 else 2612 return *this; 2613} 2614 2615inline const ObjCInterfaceType *Type::getAsPointerToObjCInterfaceType() const { 2616 if (const PointerType *PT = getAs<PointerType>()) 2617 return PT->getPointeeType()->getAs<ObjCInterfaceType>(); 2618 return 0; 2619} 2620 2621// NOTE: All of these methods use "getUnqualifiedType" to strip off address 2622// space qualifiers if present. 2623inline bool Type::isFunctionType() const { 2624 return isa<FunctionType>(CanonicalType.getUnqualifiedType()); 2625} 2626inline bool Type::isPointerType() const { 2627 return isa<PointerType>(CanonicalType.getUnqualifiedType()); 2628} 2629inline bool Type::isAnyPointerType() const { 2630 return isPointerType() || isObjCObjectPointerType(); 2631} 2632inline bool Type::isBlockPointerType() const { 2633 return isa<BlockPointerType>(CanonicalType.getUnqualifiedType()); 2634} 2635inline bool Type::isReferenceType() const { 2636 return isa<ReferenceType>(CanonicalType.getUnqualifiedType()); 2637} 2638inline bool Type::isLValueReferenceType() const { 2639 return isa<LValueReferenceType>(CanonicalType.getUnqualifiedType()); 2640} 2641inline bool Type::isRValueReferenceType() const { 2642 return isa<RValueReferenceType>(CanonicalType.getUnqualifiedType()); 2643} 2644inline bool Type::isFunctionPointerType() const { 2645 if (const PointerType* T = getAs<PointerType>()) 2646 return T->getPointeeType()->isFunctionType(); 2647 else 2648 return false; 2649} 2650inline bool Type::isMemberPointerType() const { 2651 return isa<MemberPointerType>(CanonicalType.getUnqualifiedType()); 2652} 2653inline bool Type::isMemberFunctionPointerType() const { 2654 if (const MemberPointerType* T = getAs<MemberPointerType>()) 2655 return T->getPointeeType()->isFunctionType(); 2656 else 2657 return false; 2658} 2659inline bool Type::isArrayType() const { 2660 return isa<ArrayType>(CanonicalType.getUnqualifiedType()); 2661} 2662inline bool Type::isConstantArrayType() const { 2663 return isa<ConstantArrayType>(CanonicalType.getUnqualifiedType()); 2664} 2665inline bool Type::isIncompleteArrayType() const { 2666 return isa<IncompleteArrayType>(CanonicalType.getUnqualifiedType()); 2667} 2668inline bool Type::isVariableArrayType() const { 2669 return isa<VariableArrayType>(CanonicalType.getUnqualifiedType()); 2670} 2671inline bool Type::isDependentSizedArrayType() const { 2672 return isa<DependentSizedArrayType>(CanonicalType.getUnqualifiedType()); 2673} 2674inline bool Type::isRecordType() const { 2675 return isa<RecordType>(CanonicalType.getUnqualifiedType()); 2676} 2677inline bool Type::isAnyComplexType() const { 2678 return isa<ComplexType>(CanonicalType.getUnqualifiedType()); 2679} 2680inline bool Type::isVectorType() const { 2681 return isa<VectorType>(CanonicalType.getUnqualifiedType()); 2682} 2683inline bool Type::isExtVectorType() const { 2684 return isa<ExtVectorType>(CanonicalType.getUnqualifiedType()); 2685} 2686inline bool Type::isObjCObjectPointerType() const { 2687 return isa<ObjCObjectPointerType>(CanonicalType.getUnqualifiedType()); 2688} 2689inline bool Type::isObjCInterfaceType() const { 2690 return isa<ObjCInterfaceType>(CanonicalType.getUnqualifiedType()); 2691} 2692inline bool Type::isObjCQualifiedIdType() const { 2693 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 2694 return OPT->isObjCQualifiedIdType(); 2695 return false; 2696} 2697inline bool Type::isObjCQualifiedClassType() const { 2698 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 2699 return OPT->isObjCQualifiedClassType(); 2700 return false; 2701} 2702inline bool Type::isObjCIdType() const { 2703 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 2704 return OPT->isObjCIdType(); 2705 return false; 2706} 2707inline bool Type::isObjCClassType() const { 2708 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 2709 return OPT->isObjCClassType(); 2710 return false; 2711} 2712inline bool Type::isObjCBuiltinType() const { 2713 return isObjCIdType() || isObjCClassType(); 2714} 2715inline bool Type::isTemplateTypeParmType() const { 2716 return isa<TemplateTypeParmType>(CanonicalType.getUnqualifiedType()); 2717} 2718 2719inline bool Type::isSpecificBuiltinType(unsigned K) const { 2720 if (const BuiltinType *BT = getAs<BuiltinType>()) 2721 if (BT->getKind() == (BuiltinType::Kind) K) 2722 return true; 2723 return false; 2724} 2725 2726/// \brief Determines whether this is a type for which one can define 2727/// an overloaded operator. 2728inline bool Type::isOverloadableType() const { 2729 return isDependentType() || isRecordType() || isEnumeralType(); 2730} 2731 2732inline bool Type::hasPointerRepresentation() const { 2733 return (isPointerType() || isReferenceType() || isBlockPointerType() || 2734 isObjCInterfaceType() || isObjCObjectPointerType() || 2735 isObjCQualifiedInterfaceType() || isNullPtrType()); 2736} 2737 2738inline bool Type::hasObjCPointerRepresentation() const { 2739 return (isObjCInterfaceType() || isObjCObjectPointerType() || 2740 isObjCQualifiedInterfaceType()); 2741} 2742 2743/// Insertion operator for diagnostics. This allows sending QualType's into a 2744/// diagnostic with <<. 2745inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 2746 QualType T) { 2747 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 2748 Diagnostic::ak_qualtype); 2749 return DB; 2750} 2751 2752/// Member-template getAs<specific type>'. 2753template <typename T> const T *Type::getAs() const { 2754 // If this is directly a T type, return it. 2755 if (const T *Ty = dyn_cast<T>(this)) 2756 return Ty; 2757 2758 // If the canonical form of this type isn't the right kind, reject it. 2759 if (!isa<T>(CanonicalType)) 2760 return 0; 2761 2762 // If this is a typedef for the type, strip the typedef off without 2763 // losing all typedef information. 2764 return cast<T>(getDesugaredType()); 2765} 2766 2767} // end namespace clang 2768 2769#endif 2770