Type.h revision 6cbe8f397e8fd4aa01310bcefdcbe36639eea7e0
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 const char *getTypeClassName() const; 878 879 QualType getCanonicalTypeInternal() const { return CanonicalType; } 880 void dump() const; 881 virtual void getAsStringInternal(std::string &InnerString, 882 const PrintingPolicy &Policy) const = 0; 883 static bool classof(const Type *) { return true; } 884}; 885 886template <> inline const TypedefType *Type::getAs() const { 887 return dyn_cast<TypedefType>(this); 888} 889 890// We can do canonical leaf types faster, because we don't have to 891// worry about preserving child type decoration. 892#define TYPE(Class, Base) 893#define LEAF_TYPE(Class) \ 894template <> inline const Class##Type *Type::getAs() const { \ 895 return dyn_cast<Class##Type>(CanonicalType); \ 896} 897#include "clang/AST/TypeNodes.def" 898 899 900/// BuiltinType - This class is used for builtin types like 'int'. Builtin 901/// types are always canonical and have a literal name field. 902class BuiltinType : public Type { 903public: 904 enum Kind { 905 Void, 906 907 Bool, // This is bool and/or _Bool. 908 Char_U, // This is 'char' for targets where char is unsigned. 909 UChar, // This is explicitly qualified unsigned char. 910 Char16, // This is 'char16_t' for C++. 911 Char32, // This is 'char32_t' for C++. 912 UShort, 913 UInt, 914 ULong, 915 ULongLong, 916 UInt128, // __uint128_t 917 918 Char_S, // This is 'char' for targets where char is signed. 919 SChar, // This is explicitly qualified signed char. 920 WChar, // This is 'wchar_t' for C++. 921 Short, 922 Int, 923 Long, 924 LongLong, 925 Int128, // __int128_t 926 927 Float, Double, LongDouble, 928 929 NullPtr, // This is the type of C++0x 'nullptr'. 930 931 Overload, // This represents the type of an overloaded function declaration. 932 Dependent, // This represents the type of a type-dependent expression. 933 934 UndeducedAuto, // In C++0x, this represents the type of an auto variable 935 // that has not been deduced yet. 936 ObjCId, // This represents the ObjC 'id' type. 937 ObjCClass // This represents the ObjC 'Class' type. 938 }; 939private: 940 Kind TypeKind; 941public: 942 BuiltinType(Kind K) 943 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent)), 944 TypeKind(K) {} 945 946 Kind getKind() const { return TypeKind; } 947 const char *getName(const LangOptions &LO) const; 948 949 virtual void getAsStringInternal(std::string &InnerString, 950 const PrintingPolicy &Policy) const; 951 952 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 953 static bool classof(const BuiltinType *) { return true; } 954}; 955 956/// FixedWidthIntType - Used for arbitrary width types that we either don't 957/// want to or can't map to named integer types. These always have a lower 958/// integer rank than builtin types of the same width. 959class FixedWidthIntType : public Type { 960private: 961 unsigned Width; 962 bool Signed; 963public: 964 FixedWidthIntType(unsigned W, bool S) : Type(FixedWidthInt, QualType(), false), 965 Width(W), Signed(S) {} 966 967 unsigned getWidth() const { return Width; } 968 bool isSigned() const { return Signed; } 969 const char *getName() const; 970 971 virtual void getAsStringInternal(std::string &InnerString, 972 const PrintingPolicy &Policy) const; 973 974 static bool classof(const Type *T) { return T->getTypeClass() == FixedWidthInt; } 975 static bool classof(const FixedWidthIntType *) { return true; } 976}; 977 978/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 979/// types (_Complex float etc) as well as the GCC integer complex extensions. 980/// 981class ComplexType : public Type, public llvm::FoldingSetNode { 982 QualType ElementType; 983 ComplexType(QualType Element, QualType CanonicalPtr) : 984 Type(Complex, CanonicalPtr, Element->isDependentType()), 985 ElementType(Element) { 986 } 987 friend class ASTContext; // ASTContext creates these. 988public: 989 QualType getElementType() const { return ElementType; } 990 991 virtual void getAsStringInternal(std::string &InnerString, 992 const PrintingPolicy &Policy) const; 993 994 void Profile(llvm::FoldingSetNodeID &ID) { 995 Profile(ID, getElementType()); 996 } 997 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 998 ID.AddPointer(Element.getAsOpaquePtr()); 999 } 1000 1001 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1002 static bool classof(const ComplexType *) { return true; } 1003}; 1004 1005/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1006/// 1007class PointerType : public Type, public llvm::FoldingSetNode { 1008 QualType PointeeType; 1009 1010 PointerType(QualType Pointee, QualType CanonicalPtr) : 1011 Type(Pointer, CanonicalPtr, Pointee->isDependentType()), PointeeType(Pointee) { 1012 } 1013 friend class ASTContext; // ASTContext creates these. 1014public: 1015 1016 virtual void getAsStringInternal(std::string &InnerString, 1017 const PrintingPolicy &Policy) const; 1018 1019 QualType getPointeeType() const { return PointeeType; } 1020 1021 void Profile(llvm::FoldingSetNodeID &ID) { 1022 Profile(ID, getPointeeType()); 1023 } 1024 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1025 ID.AddPointer(Pointee.getAsOpaquePtr()); 1026 } 1027 1028 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1029 static bool classof(const PointerType *) { return true; } 1030}; 1031 1032/// BlockPointerType - pointer to a block type. 1033/// This type is to represent types syntactically represented as 1034/// "void (^)(int)", etc. Pointee is required to always be a function type. 1035/// 1036class BlockPointerType : public Type, public llvm::FoldingSetNode { 1037 QualType PointeeType; // Block is some kind of pointer type 1038 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1039 Type(BlockPointer, CanonicalCls, Pointee->isDependentType()), 1040 PointeeType(Pointee) { 1041 } 1042 friend class ASTContext; // ASTContext creates these. 1043public: 1044 1045 // Get the pointee type. Pointee is required to always be a function type. 1046 QualType getPointeeType() const { return PointeeType; } 1047 1048 virtual void getAsStringInternal(std::string &InnerString, 1049 const PrintingPolicy &Policy) const; 1050 1051 void Profile(llvm::FoldingSetNodeID &ID) { 1052 Profile(ID, getPointeeType()); 1053 } 1054 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1055 ID.AddPointer(Pointee.getAsOpaquePtr()); 1056 } 1057 1058 static bool classof(const Type *T) { 1059 return T->getTypeClass() == BlockPointer; 1060 } 1061 static bool classof(const BlockPointerType *) { return true; } 1062}; 1063 1064/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 1065/// 1066class ReferenceType : public Type, public llvm::FoldingSetNode { 1067 QualType PointeeType; 1068 1069protected: 1070 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef) : 1071 Type(tc, CanonicalRef, Referencee->isDependentType()), 1072 PointeeType(Referencee) { 1073 } 1074public: 1075 QualType getPointeeType() const { return PointeeType; } 1076 1077 void Profile(llvm::FoldingSetNodeID &ID) { 1078 Profile(ID, getPointeeType()); 1079 } 1080 static void Profile(llvm::FoldingSetNodeID &ID, QualType Referencee) { 1081 ID.AddPointer(Referencee.getAsOpaquePtr()); 1082 } 1083 1084 static bool classof(const Type *T) { 1085 return T->getTypeClass() == LValueReference || 1086 T->getTypeClass() == RValueReference; 1087 } 1088 static bool classof(const ReferenceType *) { return true; } 1089}; 1090 1091/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 1092/// 1093class LValueReferenceType : public ReferenceType { 1094 LValueReferenceType(QualType Referencee, QualType CanonicalRef) : 1095 ReferenceType(LValueReference, Referencee, CanonicalRef) { 1096 } 1097 friend class ASTContext; // ASTContext creates these 1098public: 1099 virtual void getAsStringInternal(std::string &InnerString, 1100 const PrintingPolicy &Policy) const; 1101 1102 static bool classof(const Type *T) { 1103 return T->getTypeClass() == LValueReference; 1104 } 1105 static bool classof(const LValueReferenceType *) { return true; } 1106}; 1107 1108/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 1109/// 1110class RValueReferenceType : public ReferenceType { 1111 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 1112 ReferenceType(RValueReference, Referencee, CanonicalRef) { 1113 } 1114 friend class ASTContext; // ASTContext creates these 1115public: 1116 virtual void getAsStringInternal(std::string &InnerString, 1117 const PrintingPolicy &Policy) const; 1118 1119 static bool classof(const Type *T) { 1120 return T->getTypeClass() == RValueReference; 1121 } 1122 static bool classof(const RValueReferenceType *) { return true; } 1123}; 1124 1125/// MemberPointerType - C++ 8.3.3 - Pointers to members 1126/// 1127class MemberPointerType : public Type, public llvm::FoldingSetNode { 1128 QualType PointeeType; 1129 /// The class of which the pointee is a member. Must ultimately be a 1130 /// RecordType, but could be a typedef or a template parameter too. 1131 const Type *Class; 1132 1133 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 1134 Type(MemberPointer, CanonicalPtr, 1135 Cls->isDependentType() || Pointee->isDependentType()), 1136 PointeeType(Pointee), Class(Cls) { 1137 } 1138 friend class ASTContext; // ASTContext creates these. 1139public: 1140 1141 QualType getPointeeType() const { return PointeeType; } 1142 1143 const Type *getClass() const { return Class; } 1144 1145 virtual void getAsStringInternal(std::string &InnerString, 1146 const PrintingPolicy &Policy) const; 1147 1148 void Profile(llvm::FoldingSetNodeID &ID) { 1149 Profile(ID, getPointeeType(), getClass()); 1150 } 1151 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 1152 const Type *Class) { 1153 ID.AddPointer(Pointee.getAsOpaquePtr()); 1154 ID.AddPointer(Class); 1155 } 1156 1157 static bool classof(const Type *T) { 1158 return T->getTypeClass() == MemberPointer; 1159 } 1160 static bool classof(const MemberPointerType *) { return true; } 1161}; 1162 1163/// ArrayType - C99 6.7.5.2 - Array Declarators. 1164/// 1165class ArrayType : public Type, public llvm::FoldingSetNode { 1166public: 1167 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 1168 /// an array with a static size (e.g. int X[static 4]), or an array 1169 /// with a star size (e.g. int X[*]). 1170 /// 'static' is only allowed on function parameters. 1171 enum ArraySizeModifier { 1172 Normal, Static, Star 1173 }; 1174private: 1175 /// ElementType - The element type of the array. 1176 QualType ElementType; 1177 1178 // NOTE: VC++ treats enums as signed, avoid using the ArraySizeModifier enum 1179 /// NOTE: These fields are packed into the bitfields space in the Type class. 1180 unsigned SizeModifier : 2; 1181 1182 /// IndexTypeQuals - Capture qualifiers in declarations like: 1183 /// 'int X[static restrict 4]'. For function parameters only. 1184 unsigned IndexTypeQuals : 3; 1185 1186protected: 1187 // C++ [temp.dep.type]p1: 1188 // A type is dependent if it is... 1189 // - an array type constructed from any dependent type or whose 1190 // size is specified by a constant expression that is 1191 // value-dependent, 1192 ArrayType(TypeClass tc, QualType et, QualType can, 1193 ArraySizeModifier sm, unsigned tq) 1194 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray), 1195 ElementType(et), SizeModifier(sm), IndexTypeQuals(tq) {} 1196 1197 friend class ASTContext; // ASTContext creates these. 1198public: 1199 QualType getElementType() const { return ElementType; } 1200 ArraySizeModifier getSizeModifier() const { 1201 return ArraySizeModifier(SizeModifier); 1202 } 1203 Qualifiers getIndexTypeQualifiers() const { 1204 return Qualifiers::fromCVRMask(IndexTypeQuals); 1205 } 1206 unsigned getIndexTypeCVRQualifiers() const { return IndexTypeQuals; } 1207 1208 static bool classof(const Type *T) { 1209 return T->getTypeClass() == ConstantArray || 1210 T->getTypeClass() == ConstantArrayWithExpr || 1211 T->getTypeClass() == ConstantArrayWithoutExpr || 1212 T->getTypeClass() == VariableArray || 1213 T->getTypeClass() == IncompleteArray || 1214 T->getTypeClass() == DependentSizedArray; 1215 } 1216 static bool classof(const ArrayType *) { return true; } 1217}; 1218 1219/// ConstantArrayType - This class represents the canonical version of 1220/// C arrays with a specified constant size. For example, the canonical 1221/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 1222/// type is 'int' and the size is 404. 1223class ConstantArrayType : public ArrayType { 1224 llvm::APInt Size; // Allows us to unique the type. 1225 1226 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 1227 ArraySizeModifier sm, unsigned tq) 1228 : ArrayType(ConstantArray, et, can, sm, tq), 1229 Size(size) {} 1230protected: 1231 ConstantArrayType(TypeClass tc, QualType et, QualType can, 1232 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 1233 : ArrayType(tc, et, can, sm, tq), Size(size) {} 1234 friend class ASTContext; // ASTContext creates these. 1235public: 1236 const llvm::APInt &getSize() const { return Size; } 1237 virtual void getAsStringInternal(std::string &InnerString, 1238 const PrintingPolicy &Policy) const; 1239 1240 void Profile(llvm::FoldingSetNodeID &ID) { 1241 Profile(ID, getElementType(), getSize(), 1242 getSizeModifier(), getIndexTypeCVRQualifiers()); 1243 } 1244 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1245 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 1246 unsigned TypeQuals) { 1247 ID.AddPointer(ET.getAsOpaquePtr()); 1248 ID.AddInteger(ArraySize.getZExtValue()); 1249 ID.AddInteger(SizeMod); 1250 ID.AddInteger(TypeQuals); 1251 } 1252 static bool classof(const Type *T) { 1253 return T->getTypeClass() == ConstantArray || 1254 T->getTypeClass() == ConstantArrayWithExpr || 1255 T->getTypeClass() == ConstantArrayWithoutExpr; 1256 } 1257 static bool classof(const ConstantArrayType *) { return true; } 1258}; 1259 1260/// ConstantArrayWithExprType - This class represents C arrays with a 1261/// constant size specified by means of an integer constant expression. 1262/// For example 'int A[sizeof(int)]' has ConstantArrayWithExprType where 1263/// the element type is 'int' and the size expression is 'sizeof(int)'. 1264/// These types are non-canonical. 1265class ConstantArrayWithExprType : public ConstantArrayType { 1266 /// SizeExpr - The ICE occurring in the concrete syntax. 1267 Expr *SizeExpr; 1268 /// Brackets - The left and right array brackets. 1269 SourceRange Brackets; 1270 1271 ConstantArrayWithExprType(QualType et, QualType can, 1272 const llvm::APInt &size, Expr *e, 1273 ArraySizeModifier sm, unsigned tq, 1274 SourceRange brackets) 1275 : ConstantArrayType(ConstantArrayWithExpr, et, can, size, sm, tq), 1276 SizeExpr(e), Brackets(brackets) {} 1277 friend class ASTContext; // ASTContext creates these. 1278 virtual void Destroy(ASTContext& C); 1279 1280public: 1281 Expr *getSizeExpr() const { return SizeExpr; } 1282 SourceRange getBracketsRange() const { return Brackets; } 1283 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1284 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1285 1286 virtual void getAsStringInternal(std::string &InnerString, 1287 const PrintingPolicy &Policy) const; 1288 1289 static bool classof(const Type *T) { 1290 return T->getTypeClass() == ConstantArrayWithExpr; 1291 } 1292 static bool classof(const ConstantArrayWithExprType *) { return true; } 1293 1294 void Profile(llvm::FoldingSetNodeID &ID) { 1295 assert(0 && "Cannot unique ConstantArrayWithExprTypes."); 1296 } 1297}; 1298 1299/// ConstantArrayWithoutExprType - This class represents C arrays with a 1300/// constant size that was not specified by an integer constant expression, 1301/// but inferred by static semantics. 1302/// For example 'int A[] = { 0, 1, 2 }' has ConstantArrayWithoutExprType. 1303/// These types are non-canonical: the corresponding canonical type, 1304/// having the size specified in an APInt object, is a ConstantArrayType. 1305class ConstantArrayWithoutExprType : public ConstantArrayType { 1306 1307 ConstantArrayWithoutExprType(QualType et, QualType can, 1308 const llvm::APInt &size, 1309 ArraySizeModifier sm, unsigned tq) 1310 : ConstantArrayType(ConstantArrayWithoutExpr, et, can, size, sm, tq) {} 1311 friend class ASTContext; // ASTContext creates these. 1312 1313public: 1314 virtual void getAsStringInternal(std::string &InnerString, 1315 const PrintingPolicy &Policy) const; 1316 1317 static bool classof(const Type *T) { 1318 return T->getTypeClass() == ConstantArrayWithoutExpr; 1319 } 1320 static bool classof(const ConstantArrayWithoutExprType *) { return true; } 1321 1322 void Profile(llvm::FoldingSetNodeID &ID) { 1323 assert(0 && "Cannot unique ConstantArrayWithoutExprTypes."); 1324 } 1325}; 1326 1327/// IncompleteArrayType - This class represents C arrays with an unspecified 1328/// size. For example 'int A[]' has an IncompleteArrayType where the element 1329/// type is 'int' and the size is unspecified. 1330class IncompleteArrayType : public ArrayType { 1331 1332 IncompleteArrayType(QualType et, QualType can, 1333 ArraySizeModifier sm, unsigned tq) 1334 : ArrayType(IncompleteArray, et, can, sm, tq) {} 1335 friend class ASTContext; // ASTContext creates these. 1336public: 1337 virtual void getAsStringInternal(std::string &InnerString, 1338 const PrintingPolicy &Policy) const; 1339 1340 static bool classof(const Type *T) { 1341 return T->getTypeClass() == IncompleteArray; 1342 } 1343 static bool classof(const IncompleteArrayType *) { return true; } 1344 1345 friend class StmtIteratorBase; 1346 1347 void Profile(llvm::FoldingSetNodeID &ID) { 1348 Profile(ID, getElementType(), getSizeModifier(), 1349 getIndexTypeCVRQualifiers()); 1350 } 1351 1352 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1353 ArraySizeModifier SizeMod, unsigned TypeQuals) { 1354 ID.AddPointer(ET.getAsOpaquePtr()); 1355 ID.AddInteger(SizeMod); 1356 ID.AddInteger(TypeQuals); 1357 } 1358}; 1359 1360/// VariableArrayType - This class represents C arrays with a specified size 1361/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 1362/// Since the size expression is an arbitrary expression, we store it as such. 1363/// 1364/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 1365/// should not be: two lexically equivalent variable array types could mean 1366/// different things, for example, these variables do not have the same type 1367/// dynamically: 1368/// 1369/// void foo(int x) { 1370/// int Y[x]; 1371/// ++x; 1372/// int Z[x]; 1373/// } 1374/// 1375class VariableArrayType : public ArrayType { 1376 /// SizeExpr - An assignment expression. VLA's are only permitted within 1377 /// a function block. 1378 Stmt *SizeExpr; 1379 /// Brackets - The left and right array brackets. 1380 SourceRange Brackets; 1381 1382 VariableArrayType(QualType et, QualType can, Expr *e, 1383 ArraySizeModifier sm, unsigned tq, 1384 SourceRange brackets) 1385 : ArrayType(VariableArray, et, can, sm, tq), 1386 SizeExpr((Stmt*) e), Brackets(brackets) {} 1387 friend class ASTContext; // ASTContext creates these. 1388 virtual void Destroy(ASTContext& C); 1389 1390public: 1391 Expr *getSizeExpr() const { 1392 // We use C-style casts instead of cast<> here because we do not wish 1393 // to have a dependency of Type.h on Stmt.h/Expr.h. 1394 return (Expr*) SizeExpr; 1395 } 1396 SourceRange getBracketsRange() const { return Brackets; } 1397 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1398 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1399 1400 virtual void getAsStringInternal(std::string &InnerString, 1401 const PrintingPolicy &Policy) const; 1402 1403 static bool classof(const Type *T) { 1404 return T->getTypeClass() == VariableArray; 1405 } 1406 static bool classof(const VariableArrayType *) { return true; } 1407 1408 friend class StmtIteratorBase; 1409 1410 void Profile(llvm::FoldingSetNodeID &ID) { 1411 assert(0 && "Cannnot unique VariableArrayTypes."); 1412 } 1413}; 1414 1415/// DependentSizedArrayType - This type represents an array type in 1416/// C++ whose size is a value-dependent expression. For example: 1417/// @code 1418/// template<typename T, int Size> 1419/// class array { 1420/// T data[Size]; 1421/// }; 1422/// @endcode 1423/// For these types, we won't actually know what the array bound is 1424/// until template instantiation occurs, at which point this will 1425/// become either a ConstantArrayType or a VariableArrayType. 1426class DependentSizedArrayType : public ArrayType { 1427 ASTContext &Context; 1428 1429 /// SizeExpr - An assignment expression that will instantiate to the 1430 /// size of the array. 1431 Stmt *SizeExpr; 1432 /// Brackets - The left and right array brackets. 1433 SourceRange Brackets; 1434 1435 DependentSizedArrayType(ASTContext &Context, QualType et, QualType can, 1436 Expr *e, ArraySizeModifier sm, unsigned tq, 1437 SourceRange brackets) 1438 : ArrayType(DependentSizedArray, et, can, sm, tq), 1439 Context(Context), SizeExpr((Stmt*) e), Brackets(brackets) {} 1440 friend class ASTContext; // ASTContext creates these. 1441 virtual void Destroy(ASTContext& C); 1442 1443public: 1444 Expr *getSizeExpr() const { 1445 // We use C-style casts instead of cast<> here because we do not wish 1446 // to have a dependency of Type.h on Stmt.h/Expr.h. 1447 return (Expr*) SizeExpr; 1448 } 1449 SourceRange getBracketsRange() const { return Brackets; } 1450 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1451 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1452 1453 virtual void getAsStringInternal(std::string &InnerString, 1454 const PrintingPolicy &Policy) const; 1455 1456 static bool classof(const Type *T) { 1457 return T->getTypeClass() == DependentSizedArray; 1458 } 1459 static bool classof(const DependentSizedArrayType *) { return true; } 1460 1461 friend class StmtIteratorBase; 1462 1463 1464 void Profile(llvm::FoldingSetNodeID &ID) { 1465 Profile(ID, Context, getElementType(), 1466 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 1467 } 1468 1469 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1470 QualType ET, ArraySizeModifier SizeMod, 1471 unsigned TypeQuals, Expr *E); 1472}; 1473 1474/// DependentSizedExtVectorType - This type represent an extended vector type 1475/// where either the type or size is dependent. For example: 1476/// @code 1477/// template<typename T, int Size> 1478/// class vector { 1479/// typedef T __attribute__((ext_vector_type(Size))) type; 1480/// } 1481/// @endcode 1482class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 1483 ASTContext &Context; 1484 Expr *SizeExpr; 1485 /// ElementType - The element type of the array. 1486 QualType ElementType; 1487 SourceLocation loc; 1488 1489 DependentSizedExtVectorType(ASTContext &Context, QualType ElementType, 1490 QualType can, Expr *SizeExpr, SourceLocation loc) 1491 : Type (DependentSizedExtVector, can, true), 1492 Context(Context), SizeExpr(SizeExpr), ElementType(ElementType), 1493 loc(loc) {} 1494 friend class ASTContext; 1495 virtual void Destroy(ASTContext& C); 1496 1497public: 1498 Expr *getSizeExpr() const { return SizeExpr; } 1499 QualType getElementType() const { return ElementType; } 1500 SourceLocation getAttributeLoc() const { return loc; } 1501 1502 virtual void getAsStringInternal(std::string &InnerString, 1503 const PrintingPolicy &Policy) const; 1504 1505 static bool classof(const Type *T) { 1506 return T->getTypeClass() == DependentSizedExtVector; 1507 } 1508 static bool classof(const DependentSizedExtVectorType *) { return true; } 1509 1510 void Profile(llvm::FoldingSetNodeID &ID) { 1511 Profile(ID, Context, getElementType(), getSizeExpr()); 1512 } 1513 1514 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1515 QualType ElementType, Expr *SizeExpr); 1516}; 1517 1518 1519/// VectorType - GCC generic vector type. This type is created using 1520/// __attribute__((vector_size(n)), where "n" specifies the vector size in 1521/// bytes. Since the constructor takes the number of vector elements, the 1522/// client is responsible for converting the size into the number of elements. 1523class VectorType : public Type, public llvm::FoldingSetNode { 1524protected: 1525 /// ElementType - The element type of the vector. 1526 QualType ElementType; 1527 1528 /// NumElements - The number of elements in the vector. 1529 unsigned NumElements; 1530 1531 VectorType(QualType vecType, unsigned nElements, QualType canonType) : 1532 Type(Vector, canonType, vecType->isDependentType()), 1533 ElementType(vecType), NumElements(nElements) {} 1534 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 1535 QualType canonType) 1536 : Type(tc, canonType, vecType->isDependentType()), ElementType(vecType), 1537 NumElements(nElements) {} 1538 friend class ASTContext; // ASTContext creates these. 1539public: 1540 1541 QualType getElementType() const { return ElementType; } 1542 unsigned getNumElements() const { return NumElements; } 1543 1544 virtual void getAsStringInternal(std::string &InnerString, 1545 const PrintingPolicy &Policy) const; 1546 1547 void Profile(llvm::FoldingSetNodeID &ID) { 1548 Profile(ID, getElementType(), getNumElements(), getTypeClass()); 1549 } 1550 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 1551 unsigned NumElements, TypeClass TypeClass) { 1552 ID.AddPointer(ElementType.getAsOpaquePtr()); 1553 ID.AddInteger(NumElements); 1554 ID.AddInteger(TypeClass); 1555 } 1556 static bool classof(const Type *T) { 1557 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 1558 } 1559 static bool classof(const VectorType *) { return true; } 1560}; 1561 1562/// ExtVectorType - Extended vector type. This type is created using 1563/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 1564/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 1565/// class enables syntactic extensions, like Vector Components for accessing 1566/// points, colors, and textures (modeled after OpenGL Shading Language). 1567class ExtVectorType : public VectorType { 1568 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 1569 VectorType(ExtVector, vecType, nElements, canonType) {} 1570 friend class ASTContext; // ASTContext creates these. 1571public: 1572 static int getPointAccessorIdx(char c) { 1573 switch (c) { 1574 default: return -1; 1575 case 'x': return 0; 1576 case 'y': return 1; 1577 case 'z': return 2; 1578 case 'w': return 3; 1579 } 1580 } 1581 static int getNumericAccessorIdx(char c) { 1582 switch (c) { 1583 default: return -1; 1584 case '0': return 0; 1585 case '1': return 1; 1586 case '2': return 2; 1587 case '3': return 3; 1588 case '4': return 4; 1589 case '5': return 5; 1590 case '6': return 6; 1591 case '7': return 7; 1592 case '8': return 8; 1593 case '9': return 9; 1594 case 'A': 1595 case 'a': return 10; 1596 case 'B': 1597 case 'b': return 11; 1598 case 'C': 1599 case 'c': return 12; 1600 case 'D': 1601 case 'd': return 13; 1602 case 'E': 1603 case 'e': return 14; 1604 case 'F': 1605 case 'f': return 15; 1606 } 1607 } 1608 1609 static int getAccessorIdx(char c) { 1610 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 1611 return getNumericAccessorIdx(c); 1612 } 1613 1614 bool isAccessorWithinNumElements(char c) const { 1615 if (int idx = getAccessorIdx(c)+1) 1616 return unsigned(idx-1) < NumElements; 1617 return false; 1618 } 1619 virtual void getAsStringInternal(std::string &InnerString, 1620 const PrintingPolicy &Policy) const; 1621 1622 static bool classof(const Type *T) { 1623 return T->getTypeClass() == ExtVector; 1624 } 1625 static bool classof(const ExtVectorType *) { return true; } 1626}; 1627 1628/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 1629/// class of FunctionNoProtoType and FunctionProtoType. 1630/// 1631class FunctionType : public Type { 1632 /// SubClassData - This field is owned by the subclass, put here to pack 1633 /// tightly with the ivars in Type. 1634 bool SubClassData : 1; 1635 1636 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1637 /// other bitfields. 1638 /// The qualifiers are part of FunctionProtoType because... 1639 /// 1640 /// C++ 8.3.5p4: The return type, the parameter type list and the 1641 /// cv-qualifier-seq, [...], are part of the function type. 1642 /// 1643 unsigned TypeQuals : 3; 1644 1645 /// NoReturn - Indicates if the function type is attribute noreturn. 1646 unsigned NoReturn : 1; 1647 1648 // The type returned by the function. 1649 QualType ResultType; 1650protected: 1651 FunctionType(TypeClass tc, QualType res, bool SubclassInfo, 1652 unsigned typeQuals, QualType Canonical, bool Dependent, 1653 bool noReturn = false) 1654 : Type(tc, Canonical, Dependent), 1655 SubClassData(SubclassInfo), TypeQuals(typeQuals), NoReturn(noReturn), 1656 ResultType(res) {} 1657 bool getSubClassData() const { return SubClassData; } 1658 unsigned getTypeQuals() const { return TypeQuals; } 1659public: 1660 1661 QualType getResultType() const { return ResultType; } 1662 bool getNoReturnAttr() const { return NoReturn; } 1663 1664 1665 static bool classof(const Type *T) { 1666 return T->getTypeClass() == FunctionNoProto || 1667 T->getTypeClass() == FunctionProto; 1668 } 1669 static bool classof(const FunctionType *) { return true; } 1670}; 1671 1672/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 1673/// no information available about its arguments. 1674class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 1675 FunctionNoProtoType(QualType Result, QualType Canonical, 1676 bool NoReturn = false) 1677 : FunctionType(FunctionNoProto, Result, false, 0, Canonical, 1678 /*Dependent=*/false, NoReturn) {} 1679 friend class ASTContext; // ASTContext creates these. 1680public: 1681 // No additional state past what FunctionType provides. 1682 1683 virtual void getAsStringInternal(std::string &InnerString, 1684 const PrintingPolicy &Policy) const; 1685 1686 void Profile(llvm::FoldingSetNodeID &ID) { 1687 Profile(ID, getResultType(), getNoReturnAttr()); 1688 } 1689 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 1690 bool NoReturn) { 1691 ID.AddInteger(NoReturn); 1692 ID.AddPointer(ResultType.getAsOpaquePtr()); 1693 } 1694 1695 static bool classof(const Type *T) { 1696 return T->getTypeClass() == FunctionNoProto; 1697 } 1698 static bool classof(const FunctionNoProtoType *) { return true; } 1699}; 1700 1701/// FunctionProtoType - Represents a prototype with argument type info, e.g. 1702/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 1703/// arguments, not as having a single void argument. Such a type can have an 1704/// exception specification, but this specification is not part of the canonical 1705/// type. 1706class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 1707 /// hasAnyDependentType - Determine whether there are any dependent 1708 /// types within the arguments passed in. 1709 static bool hasAnyDependentType(const QualType *ArgArray, unsigned numArgs) { 1710 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 1711 if (ArgArray[Idx]->isDependentType()) 1712 return true; 1713 1714 return false; 1715 } 1716 1717 FunctionProtoType(QualType Result, const QualType *ArgArray, unsigned numArgs, 1718 bool isVariadic, unsigned typeQuals, bool hasExs, 1719 bool hasAnyExs, const QualType *ExArray, 1720 unsigned numExs, QualType Canonical, bool NoReturn) 1721 : FunctionType(FunctionProto, Result, isVariadic, typeQuals, Canonical, 1722 (Result->isDependentType() || 1723 hasAnyDependentType(ArgArray, numArgs)), NoReturn), 1724 NumArgs(numArgs), NumExceptions(numExs), HasExceptionSpec(hasExs), 1725 AnyExceptionSpec(hasAnyExs) { 1726 // Fill in the trailing argument array. 1727 QualType *ArgInfo = reinterpret_cast<QualType*>(this+1); 1728 for (unsigned i = 0; i != numArgs; ++i) 1729 ArgInfo[i] = ArgArray[i]; 1730 // Fill in the exception array. 1731 QualType *Ex = ArgInfo + numArgs; 1732 for (unsigned i = 0; i != numExs; ++i) 1733 Ex[i] = ExArray[i]; 1734 } 1735 1736 /// NumArgs - The number of arguments this function has, not counting '...'. 1737 unsigned NumArgs : 20; 1738 1739 /// NumExceptions - The number of types in the exception spec, if any. 1740 unsigned NumExceptions : 10; 1741 1742 /// HasExceptionSpec - Whether this function has an exception spec at all. 1743 bool HasExceptionSpec : 1; 1744 1745 /// AnyExceptionSpec - Whether this function has a throw(...) spec. 1746 bool AnyExceptionSpec : 1; 1747 1748 /// ArgInfo - There is an variable size array after the class in memory that 1749 /// holds the argument types. 1750 1751 /// Exceptions - There is another variable size array after ArgInfo that 1752 /// holds the exception types. 1753 1754 friend class ASTContext; // ASTContext creates these. 1755 1756public: 1757 unsigned getNumArgs() const { return NumArgs; } 1758 QualType getArgType(unsigned i) const { 1759 assert(i < NumArgs && "Invalid argument number!"); 1760 return arg_type_begin()[i]; 1761 } 1762 1763 bool hasExceptionSpec() const { return HasExceptionSpec; } 1764 bool hasAnyExceptionSpec() const { return AnyExceptionSpec; } 1765 unsigned getNumExceptions() const { return NumExceptions; } 1766 QualType getExceptionType(unsigned i) const { 1767 assert(i < NumExceptions && "Invalid exception number!"); 1768 return exception_begin()[i]; 1769 } 1770 bool hasEmptyExceptionSpec() const { 1771 return hasExceptionSpec() && !hasAnyExceptionSpec() && 1772 getNumExceptions() == 0; 1773 } 1774 1775 bool isVariadic() const { return getSubClassData(); } 1776 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 1777 1778 typedef const QualType *arg_type_iterator; 1779 arg_type_iterator arg_type_begin() const { 1780 return reinterpret_cast<const QualType *>(this+1); 1781 } 1782 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 1783 1784 typedef const QualType *exception_iterator; 1785 exception_iterator exception_begin() const { 1786 // exceptions begin where arguments end 1787 return arg_type_end(); 1788 } 1789 exception_iterator exception_end() const { 1790 return exception_begin() + NumExceptions; 1791 } 1792 1793 virtual void getAsStringInternal(std::string &InnerString, 1794 const PrintingPolicy &Policy) const; 1795 1796 static bool classof(const Type *T) { 1797 return T->getTypeClass() == FunctionProto; 1798 } 1799 static bool classof(const FunctionProtoType *) { return true; } 1800 1801 void Profile(llvm::FoldingSetNodeID &ID); 1802 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 1803 arg_type_iterator ArgTys, unsigned NumArgs, 1804 bool isVariadic, unsigned TypeQuals, 1805 bool hasExceptionSpec, bool anyExceptionSpec, 1806 unsigned NumExceptions, exception_iterator Exs, 1807 bool NoReturn); 1808}; 1809 1810 1811class TypedefType : public Type { 1812 TypedefDecl *Decl; 1813protected: 1814 TypedefType(TypeClass tc, TypedefDecl *D, QualType can) 1815 : Type(tc, can, can->isDependentType()), Decl(D) { 1816 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1817 } 1818 friend class ASTContext; // ASTContext creates these. 1819public: 1820 1821 TypedefDecl *getDecl() const { return Decl; } 1822 1823 /// LookThroughTypedefs - Return the ultimate type this typedef corresponds to 1824 /// potentially looking through *all* consecutive typedefs. This returns the 1825 /// sum of the type qualifiers, so if you have: 1826 /// typedef const int A; 1827 /// typedef volatile A B; 1828 /// looking through the typedefs for B will give you "const volatile A". 1829 QualType LookThroughTypedefs() const; 1830 1831 virtual void getAsStringInternal(std::string &InnerString, 1832 const PrintingPolicy &Policy) const; 1833 1834 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 1835 static bool classof(const TypedefType *) { return true; } 1836}; 1837 1838/// TypeOfExprType (GCC extension). 1839class TypeOfExprType : public Type { 1840 Expr *TOExpr; 1841 1842protected: 1843 TypeOfExprType(Expr *E, QualType can = QualType()); 1844 friend class ASTContext; // ASTContext creates these. 1845public: 1846 Expr *getUnderlyingExpr() const { return TOExpr; } 1847 1848 virtual void getAsStringInternal(std::string &InnerString, 1849 const PrintingPolicy &Policy) const; 1850 1851 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 1852 static bool classof(const TypeOfExprType *) { return true; } 1853}; 1854 1855/// Subclass of TypeOfExprType that is used for canonical, dependent 1856/// typeof(expr) types. 1857class DependentTypeOfExprType 1858 : public TypeOfExprType, public llvm::FoldingSetNode { 1859 ASTContext &Context; 1860 1861public: 1862 DependentTypeOfExprType(ASTContext &Context, Expr *E) 1863 : TypeOfExprType(E), Context(Context) { } 1864 1865 void Profile(llvm::FoldingSetNodeID &ID) { 1866 Profile(ID, Context, getUnderlyingExpr()); 1867 } 1868 1869 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1870 Expr *E); 1871}; 1872 1873/// TypeOfType (GCC extension). 1874class TypeOfType : public Type { 1875 QualType TOType; 1876 TypeOfType(QualType T, QualType can) 1877 : Type(TypeOf, can, T->isDependentType()), TOType(T) { 1878 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1879 } 1880 friend class ASTContext; // ASTContext creates these. 1881public: 1882 QualType getUnderlyingType() const { return TOType; } 1883 1884 virtual void getAsStringInternal(std::string &InnerString, 1885 const PrintingPolicy &Policy) const; 1886 1887 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 1888 static bool classof(const TypeOfType *) { return true; } 1889}; 1890 1891/// DecltypeType (C++0x) 1892class DecltypeType : public Type { 1893 Expr *E; 1894 1895 // FIXME: We could get rid of UnderlyingType if we wanted to: We would have to 1896 // Move getDesugaredType to ASTContext so that it can call getDecltypeForExpr 1897 // from it. 1898 QualType UnderlyingType; 1899 1900protected: 1901 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 1902 friend class ASTContext; // ASTContext creates these. 1903public: 1904 Expr *getUnderlyingExpr() const { return E; } 1905 QualType getUnderlyingType() const { return UnderlyingType; } 1906 1907 virtual void getAsStringInternal(std::string &InnerString, 1908 const PrintingPolicy &Policy) const; 1909 1910 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 1911 static bool classof(const DecltypeType *) { return true; } 1912}; 1913 1914/// Subclass of DecltypeType that is used for canonical, dependent 1915/// C++0x decltype types. 1916class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 1917 ASTContext &Context; 1918 1919public: 1920 DependentDecltypeType(ASTContext &Context, Expr *E); 1921 1922 void Profile(llvm::FoldingSetNodeID &ID) { 1923 Profile(ID, Context, getUnderlyingExpr()); 1924 } 1925 1926 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1927 Expr *E); 1928}; 1929 1930class TagType : public Type { 1931 /// Stores the TagDecl associated with this type. The decl will 1932 /// point to the TagDecl that actually defines the entity (or is a 1933 /// definition in progress), if there is such a definition. The 1934 /// single-bit value will be non-zero when this tag is in the 1935 /// process of being defined. 1936 mutable llvm::PointerIntPair<TagDecl *, 1> decl; 1937 friend class ASTContext; 1938 friend class TagDecl; 1939 1940protected: 1941 TagType(TypeClass TC, TagDecl *D, QualType can); 1942 1943public: 1944 TagDecl *getDecl() const { return decl.getPointer(); } 1945 1946 /// @brief Determines whether this type is in the process of being 1947 /// defined. 1948 bool isBeingDefined() const { return decl.getInt(); } 1949 void setBeingDefined(bool Def) const { decl.setInt(Def? 1 : 0); } 1950 1951 virtual void getAsStringInternal(std::string &InnerString, 1952 const PrintingPolicy &Policy) const; 1953 1954 static bool classof(const Type *T) { 1955 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 1956 } 1957 static bool classof(const TagType *) { return true; } 1958 static bool classof(const RecordType *) { return true; } 1959 static bool classof(const EnumType *) { return true; } 1960}; 1961 1962/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 1963/// to detect TagType objects of structs/unions/classes. 1964class RecordType : public TagType { 1965protected: 1966 explicit RecordType(RecordDecl *D) 1967 : TagType(Record, reinterpret_cast<TagDecl*>(D), QualType()) { } 1968 explicit RecordType(TypeClass TC, RecordDecl *D) 1969 : TagType(TC, reinterpret_cast<TagDecl*>(D), QualType()) { } 1970 friend class ASTContext; // ASTContext creates these. 1971public: 1972 1973 RecordDecl *getDecl() const { 1974 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 1975 } 1976 1977 // FIXME: This predicate is a helper to QualType/Type. It needs to 1978 // recursively check all fields for const-ness. If any field is declared 1979 // const, it needs to return false. 1980 bool hasConstFields() const { return false; } 1981 1982 // FIXME: RecordType needs to check when it is created that all fields are in 1983 // the same address space, and return that. 1984 unsigned getAddressSpace() const { return 0; } 1985 1986 static bool classof(const TagType *T); 1987 static bool classof(const Type *T) { 1988 return isa<TagType>(T) && classof(cast<TagType>(T)); 1989 } 1990 static bool classof(const RecordType *) { return true; } 1991}; 1992 1993/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 1994/// to detect TagType objects of enums. 1995class EnumType : public TagType { 1996 explicit EnumType(EnumDecl *D) 1997 : TagType(Enum, reinterpret_cast<TagDecl*>(D), QualType()) { } 1998 friend class ASTContext; // ASTContext creates these. 1999public: 2000 2001 EnumDecl *getDecl() const { 2002 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 2003 } 2004 2005 static bool classof(const TagType *T); 2006 static bool classof(const Type *T) { 2007 return isa<TagType>(T) && classof(cast<TagType>(T)); 2008 } 2009 static bool classof(const EnumType *) { return true; } 2010}; 2011 2012/// ElaboratedType - A non-canonical type used to represents uses of 2013/// elaborated type specifiers in C++. For example: 2014/// 2015/// void foo(union MyUnion); 2016/// ^^^^^^^^^^^^^ 2017/// 2018/// At the moment, for efficiency we do not create elaborated types in 2019/// C, since outside of typedefs all references to structs would 2020/// necessarily be elaborated. 2021class ElaboratedType : public Type, public llvm::FoldingSetNode { 2022public: 2023 enum TagKind { 2024 TK_struct, 2025 TK_union, 2026 TK_class, 2027 TK_enum 2028 }; 2029 2030private: 2031 /// The tag that was used in this elaborated type specifier. 2032 TagKind Tag; 2033 2034 /// The underlying type. 2035 QualType UnderlyingType; 2036 2037 explicit ElaboratedType(QualType Ty, TagKind Tag, QualType Canon) 2038 : Type(Elaborated, Canon, Canon->isDependentType()), 2039 Tag(Tag), UnderlyingType(Ty) { } 2040 friend class ASTContext; // ASTContext creates these. 2041 2042public: 2043 TagKind getTagKind() const { return Tag; } 2044 QualType getUnderlyingType() const { return UnderlyingType; } 2045 2046 static const char *getNameForTagKind(TagKind Kind) { 2047 switch (Kind) { 2048 default: assert(0 && "Unknown TagKind!"); 2049 case TK_struct: return "struct"; 2050 case TK_union: return "union"; 2051 case TK_class: return "class"; 2052 case TK_enum: return "enum"; 2053 } 2054 } 2055 2056 virtual void getAsStringInternal(std::string &InnerString, 2057 const PrintingPolicy &Policy) const; 2058 2059 void Profile(llvm::FoldingSetNodeID &ID) { 2060 Profile(ID, getUnderlyingType(), getTagKind()); 2061 } 2062 static void Profile(llvm::FoldingSetNodeID &ID, QualType T, TagKind Tag) { 2063 ID.AddPointer(T.getAsOpaquePtr()); 2064 ID.AddInteger(Tag); 2065 } 2066 2067 static bool classof(const ElaboratedType*) { return true; } 2068 static bool classof(const Type *T) { return T->getTypeClass() == Elaborated; } 2069}; 2070 2071class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2072 unsigned Depth : 15; 2073 unsigned Index : 16; 2074 unsigned ParameterPack : 1; 2075 IdentifierInfo *Name; 2076 2077 TemplateTypeParmType(unsigned D, unsigned I, bool PP, IdentifierInfo *N, 2078 QualType Canon) 2079 : Type(TemplateTypeParm, Canon, /*Dependent=*/true), 2080 Depth(D), Index(I), ParameterPack(PP), Name(N) { } 2081 2082 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 2083 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true), 2084 Depth(D), Index(I), ParameterPack(PP), Name(0) { } 2085 2086 friend class ASTContext; // ASTContext creates these 2087 2088public: 2089 unsigned getDepth() const { return Depth; } 2090 unsigned getIndex() const { return Index; } 2091 bool isParameterPack() const { return ParameterPack; } 2092 IdentifierInfo *getName() const { return Name; } 2093 2094 virtual void getAsStringInternal(std::string &InnerString, 2095 const PrintingPolicy &Policy) const; 2096 2097 void Profile(llvm::FoldingSetNodeID &ID) { 2098 Profile(ID, Depth, Index, ParameterPack, Name); 2099 } 2100 2101 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 2102 unsigned Index, bool ParameterPack, 2103 IdentifierInfo *Name) { 2104 ID.AddInteger(Depth); 2105 ID.AddInteger(Index); 2106 ID.AddBoolean(ParameterPack); 2107 ID.AddPointer(Name); 2108 } 2109 2110 static bool classof(const Type *T) { 2111 return T->getTypeClass() == TemplateTypeParm; 2112 } 2113 static bool classof(const TemplateTypeParmType *T) { return true; } 2114}; 2115 2116/// \brief Represents the type of a template specialization as written 2117/// in the source code. 2118/// 2119/// Template specialization types represent the syntactic form of a 2120/// template-id that refers to a type, e.g., @c vector<int>. Some 2121/// template specialization types are syntactic sugar, whose canonical 2122/// type will point to some other type node that represents the 2123/// instantiation or class template specialization. For example, a 2124/// class template specialization type of @c vector<int> will refer to 2125/// a tag type for the instantiation 2126/// @c std::vector<int, std::allocator<int>>. 2127/// 2128/// Other template specialization types, for which the template name 2129/// is dependent, may be canonical types. These types are always 2130/// dependent. 2131class TemplateSpecializationType 2132 : public Type, public llvm::FoldingSetNode { 2133 2134 // FIXME: Currently needed for profiling expressions; can we avoid this? 2135 ASTContext &Context; 2136 2137 /// \brief The name of the template being specialized. 2138 TemplateName Template; 2139 2140 /// \brief - The number of template arguments named in this class 2141 /// template specialization. 2142 unsigned NumArgs; 2143 2144 TemplateSpecializationType(ASTContext &Context, 2145 TemplateName T, 2146 const TemplateArgument *Args, 2147 unsigned NumArgs, QualType Canon); 2148 2149 virtual void Destroy(ASTContext& C); 2150 2151 friend class ASTContext; // ASTContext creates these 2152 2153public: 2154 /// \brief Determine whether any of the given template arguments are 2155 /// dependent. 2156 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 2157 unsigned NumArgs); 2158 2159 /// \brief Print a template argument list, including the '<' and '>' 2160 /// enclosing the template arguments. 2161 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 2162 unsigned NumArgs, 2163 const PrintingPolicy &Policy); 2164 2165 typedef const TemplateArgument * iterator; 2166 2167 iterator begin() const { return getArgs(); } 2168 iterator end() const; 2169 2170 /// \brief Retrieve the name of the template that we are specializing. 2171 TemplateName getTemplateName() const { return Template; } 2172 2173 /// \brief Retrieve the template arguments. 2174 const TemplateArgument *getArgs() const { 2175 return reinterpret_cast<const TemplateArgument *>(this + 1); 2176 } 2177 2178 /// \brief Retrieve the number of template arguments. 2179 unsigned getNumArgs() const { return NumArgs; } 2180 2181 /// \brief Retrieve a specific template argument as a type. 2182 /// \precondition @c isArgType(Arg) 2183 const TemplateArgument &getArg(unsigned Idx) const; 2184 2185 virtual void getAsStringInternal(std::string &InnerString, 2186 const PrintingPolicy &Policy) const; 2187 2188 void Profile(llvm::FoldingSetNodeID &ID) { 2189 Profile(ID, Template, getArgs(), NumArgs, Context); 2190 } 2191 2192 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 2193 const TemplateArgument *Args, unsigned NumArgs, 2194 ASTContext &Context); 2195 2196 static bool classof(const Type *T) { 2197 return T->getTypeClass() == TemplateSpecialization; 2198 } 2199 static bool classof(const TemplateSpecializationType *T) { return true; } 2200}; 2201 2202/// \brief Represents a type that was referred to via a qualified 2203/// name, e.g., N::M::type. 2204/// 2205/// This type is used to keep track of a type name as written in the 2206/// source code, including any nested-name-specifiers. The type itself 2207/// is always "sugar", used to express what was written in the source 2208/// code but containing no additional semantic information. 2209class QualifiedNameType : public Type, public llvm::FoldingSetNode { 2210 /// \brief The nested name specifier containing the qualifier. 2211 NestedNameSpecifier *NNS; 2212 2213 /// \brief The type that this qualified name refers to. 2214 QualType NamedType; 2215 2216 QualifiedNameType(NestedNameSpecifier *NNS, QualType NamedType, 2217 QualType CanonType) 2218 : Type(QualifiedName, CanonType, NamedType->isDependentType()), 2219 NNS(NNS), NamedType(NamedType) { } 2220 2221 friend class ASTContext; // ASTContext creates these 2222 2223public: 2224 /// \brief Retrieve the qualification on this type. 2225 NestedNameSpecifier *getQualifier() const { return NNS; } 2226 2227 /// \brief Retrieve the type named by the qualified-id. 2228 QualType getNamedType() const { return NamedType; } 2229 2230 virtual void getAsStringInternal(std::string &InnerString, 2231 const PrintingPolicy &Policy) const; 2232 2233 void Profile(llvm::FoldingSetNodeID &ID) { 2234 Profile(ID, NNS, NamedType); 2235 } 2236 2237 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 2238 QualType NamedType) { 2239 ID.AddPointer(NNS); 2240 NamedType.Profile(ID); 2241 } 2242 2243 static bool classof(const Type *T) { 2244 return T->getTypeClass() == QualifiedName; 2245 } 2246 static bool classof(const QualifiedNameType *T) { return true; } 2247}; 2248 2249/// \brief Represents a 'typename' specifier that names a type within 2250/// a dependent type, e.g., "typename T::type". 2251/// 2252/// TypenameType has a very similar structure to QualifiedNameType, 2253/// which also involves a nested-name-specifier following by a type, 2254/// and (FIXME!) both can even be prefixed by the 'typename' 2255/// keyword. However, the two types serve very different roles: 2256/// QualifiedNameType is a non-semantic type that serves only as sugar 2257/// to show how a particular type was written in the source 2258/// code. TypenameType, on the other hand, only occurs when the 2259/// nested-name-specifier is dependent, such that we cannot resolve 2260/// the actual type until after instantiation. 2261class TypenameType : public Type, public llvm::FoldingSetNode { 2262 /// \brief The nested name specifier containing the qualifier. 2263 NestedNameSpecifier *NNS; 2264 2265 typedef llvm::PointerUnion<const IdentifierInfo *, 2266 const TemplateSpecializationType *> NameType; 2267 2268 /// \brief The type that this typename specifier refers to. 2269 NameType Name; 2270 2271 TypenameType(NestedNameSpecifier *NNS, const IdentifierInfo *Name, 2272 QualType CanonType) 2273 : Type(Typename, CanonType, true), NNS(NNS), Name(Name) { 2274 assert(NNS->isDependent() && 2275 "TypenameType requires a dependent nested-name-specifier"); 2276 } 2277 2278 TypenameType(NestedNameSpecifier *NNS, const TemplateSpecializationType *Ty, 2279 QualType CanonType) 2280 : Type(Typename, CanonType, true), NNS(NNS), Name(Ty) { 2281 assert(NNS->isDependent() && 2282 "TypenameType requires a dependent nested-name-specifier"); 2283 } 2284 2285 friend class ASTContext; // ASTContext creates these 2286 2287public: 2288 /// \brief Retrieve the qualification on this type. 2289 NestedNameSpecifier *getQualifier() const { return NNS; } 2290 2291 /// \brief Retrieve the type named by the typename specifier as an 2292 /// identifier. 2293 /// 2294 /// This routine will return a non-NULL identifier pointer when the 2295 /// form of the original typename was terminated by an identifier, 2296 /// e.g., "typename T::type". 2297 const IdentifierInfo *getIdentifier() const { 2298 return Name.dyn_cast<const IdentifierInfo *>(); 2299 } 2300 2301 /// \brief Retrieve the type named by the typename specifier as a 2302 /// type specialization. 2303 const TemplateSpecializationType *getTemplateId() const { 2304 return Name.dyn_cast<const TemplateSpecializationType *>(); 2305 } 2306 2307 virtual void getAsStringInternal(std::string &InnerString, 2308 const PrintingPolicy &Policy) const; 2309 2310 void Profile(llvm::FoldingSetNodeID &ID) { 2311 Profile(ID, NNS, Name); 2312 } 2313 2314 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 2315 NameType Name) { 2316 ID.AddPointer(NNS); 2317 ID.AddPointer(Name.getOpaqueValue()); 2318 } 2319 2320 static bool classof(const Type *T) { 2321 return T->getTypeClass() == Typename; 2322 } 2323 static bool classof(const TypenameType *T) { return true; } 2324}; 2325 2326/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 2327/// object oriented design. They basically correspond to C++ classes. There 2328/// are two kinds of interface types, normal interfaces like "NSString" and 2329/// qualified interfaces, which are qualified with a protocol list like 2330/// "NSString<NSCopyable, NSAmazing>". 2331class ObjCInterfaceType : public Type, public llvm::FoldingSetNode { 2332 ObjCInterfaceDecl *Decl; 2333 2334 // List of protocols for this protocol conforming object type 2335 // List is sorted on protocol name. No protocol is enterred more than once. 2336 llvm::SmallVector<ObjCProtocolDecl*, 4> Protocols; 2337 2338 ObjCInterfaceType(ObjCInterfaceDecl *D, 2339 ObjCProtocolDecl **Protos, unsigned NumP) : 2340 Type(ObjCInterface, QualType(), /*Dependent=*/false), 2341 Decl(D), Protocols(Protos, Protos+NumP) { } 2342 friend class ASTContext; // ASTContext creates these. 2343public: 2344 ObjCInterfaceDecl *getDecl() const { return Decl; } 2345 2346 /// getNumProtocols - Return the number of qualifying protocols in this 2347 /// interface type, or 0 if there are none. 2348 unsigned getNumProtocols() const { return Protocols.size(); } 2349 2350 /// qual_iterator and friends: this provides access to the (potentially empty) 2351 /// list of protocols qualifying this interface. 2352 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 2353 qual_iterator qual_begin() const { return Protocols.begin(); } 2354 qual_iterator qual_end() const { return Protocols.end(); } 2355 bool qual_empty() const { return Protocols.size() == 0; } 2356 2357 virtual void getAsStringInternal(std::string &InnerString, 2358 const PrintingPolicy &Policy) const; 2359 2360 void Profile(llvm::FoldingSetNodeID &ID); 2361 static void Profile(llvm::FoldingSetNodeID &ID, 2362 const ObjCInterfaceDecl *Decl, 2363 ObjCProtocolDecl **protocols, unsigned NumProtocols); 2364 2365 static bool classof(const Type *T) { 2366 return T->getTypeClass() == ObjCInterface; 2367 } 2368 static bool classof(const ObjCInterfaceType *) { return true; } 2369}; 2370 2371/// ObjCObjectPointerType - Used to represent 'id', 'Interface *', 'id <p>', 2372/// and 'Interface <p> *'. 2373/// 2374/// Duplicate protocols are removed and protocol list is canonicalized to be in 2375/// alphabetical order. 2376class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 2377 QualType PointeeType; // A builtin or interface type. 2378 2379 // List of protocols for this protocol conforming object type 2380 // List is sorted on protocol name. No protocol is entered more than once. 2381 llvm::SmallVector<ObjCProtocolDecl*, 8> Protocols; 2382 2383 ObjCObjectPointerType(QualType T, ObjCProtocolDecl **Protos, unsigned NumP) : 2384 Type(ObjCObjectPointer, QualType(), /*Dependent=*/false), 2385 PointeeType(T), Protocols(Protos, Protos+NumP) { } 2386 friend class ASTContext; // ASTContext creates these. 2387 2388public: 2389 // Get the pointee type. Pointee will either be: 2390 // - a built-in type (for 'id' and 'Class'). 2391 // - an interface type (for user-defined types). 2392 // - a TypedefType whose canonical type is an interface (as in 'T' below). 2393 // For example: typedef NSObject T; T *var; 2394 QualType getPointeeType() const { return PointeeType; } 2395 2396 const ObjCInterfaceType *getInterfaceType() const { 2397 return PointeeType->getAs<ObjCInterfaceType>(); 2398 } 2399 /// getInterfaceDecl - returns an interface decl for user-defined types. 2400 ObjCInterfaceDecl *getInterfaceDecl() const { 2401 return getInterfaceType() ? getInterfaceType()->getDecl() : 0; 2402 } 2403 /// isObjCIdType - true for "id". 2404 bool isObjCIdType() const { 2405 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCId) && 2406 !Protocols.size(); 2407 } 2408 /// isObjCClassType - true for "Class". 2409 bool isObjCClassType() const { 2410 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCClass) && 2411 !Protocols.size(); 2412 } 2413 /// isObjCQualifiedIdType - true for "id <p>". 2414 bool isObjCQualifiedIdType() const { 2415 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCId) && 2416 Protocols.size(); 2417 } 2418 /// isObjCQualifiedClassType - true for "Class <p>". 2419 bool isObjCQualifiedClassType() const { 2420 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCClass) && 2421 Protocols.size(); 2422 } 2423 /// qual_iterator and friends: this provides access to the (potentially empty) 2424 /// list of protocols qualifying this interface. 2425 typedef llvm::SmallVector<ObjCProtocolDecl*, 8>::const_iterator qual_iterator; 2426 2427 qual_iterator qual_begin() const { return Protocols.begin(); } 2428 qual_iterator qual_end() const { return Protocols.end(); } 2429 bool qual_empty() const { return Protocols.size() == 0; } 2430 2431 /// getNumProtocols - Return the number of qualifying protocols in this 2432 /// interface type, or 0 if there are none. 2433 unsigned getNumProtocols() const { return Protocols.size(); } 2434 2435 void Profile(llvm::FoldingSetNodeID &ID); 2436 static void Profile(llvm::FoldingSetNodeID &ID, QualType T, 2437 ObjCProtocolDecl **protocols, unsigned NumProtocols); 2438 virtual void getAsStringInternal(std::string &InnerString, 2439 const PrintingPolicy &Policy) const; 2440 static bool classof(const Type *T) { 2441 return T->getTypeClass() == ObjCObjectPointer; 2442 } 2443 static bool classof(const ObjCObjectPointerType *) { return true; } 2444}; 2445 2446/// A qualifier set is used to build a set of qualifiers. 2447class QualifierCollector : public Qualifiers { 2448 ASTContext *Context; 2449 2450public: 2451 QualifierCollector(Qualifiers Qs = Qualifiers()) 2452 : Qualifiers(Qs), Context(0) {} 2453 QualifierCollector(ASTContext &Context, Qualifiers Qs = Qualifiers()) 2454 : Qualifiers(Qs), Context(&Context) {} 2455 2456 void setContext(ASTContext &C) { Context = &C; } 2457 2458 /// Collect any qualifiers on the given type and return an 2459 /// unqualified type. 2460 const Type *strip(QualType QT) { 2461 addFastQualifiers(QT.getFastQualifiers()); 2462 if (QT.hasNonFastQualifiers()) { 2463 const ExtQuals *EQ = QT.getExtQualsUnsafe(); 2464 Context = &EQ->getContext(); 2465 addQualifiers(EQ->getQualifiers()); 2466 return EQ->getBaseType(); 2467 } 2468 return QT.getTypePtrUnsafe(); 2469 } 2470 2471 /// Apply the collected qualifiers to the given type. 2472 QualType apply(QualType QT) const; 2473 2474 /// Apply the collected qualifiers to the given type. 2475 QualType apply(const Type* T) const; 2476 2477}; 2478 2479 2480// Inline function definitions. 2481 2482inline void QualType::removeConst() { 2483 removeFastQualifiers(Qualifiers::Const); 2484} 2485 2486inline void QualType::removeRestrict() { 2487 removeFastQualifiers(Qualifiers::Restrict); 2488} 2489 2490inline void QualType::removeVolatile() { 2491 QualifierCollector Qc; 2492 const Type *Ty = Qc.strip(*this); 2493 if (Qc.hasVolatile()) { 2494 Qc.removeVolatile(); 2495 *this = Qc.apply(Ty); 2496 } 2497} 2498 2499inline void QualType::removeCVRQualifiers(unsigned Mask) { 2500 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 2501 2502 // Fast path: we don't need to touch the slow qualifiers. 2503 if (!(Mask & ~Qualifiers::FastMask)) { 2504 removeFastQualifiers(Mask); 2505 return; 2506 } 2507 2508 QualifierCollector Qc; 2509 const Type *Ty = Qc.strip(*this); 2510 Qc.removeCVRQualifiers(Mask); 2511 *this = Qc.apply(Ty); 2512} 2513 2514/// getAddressSpace - Return the address space of this type. 2515inline unsigned QualType::getAddressSpace() const { 2516 if (hasNonFastQualifiers()) { 2517 const ExtQuals *EQ = getExtQualsUnsafe(); 2518 if (EQ->hasAddressSpace()) 2519 return EQ->getAddressSpace(); 2520 } 2521 2522 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2523 if (CT.hasNonFastQualifiers()) { 2524 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 2525 if (EQ->hasAddressSpace()) 2526 return EQ->getAddressSpace(); 2527 } 2528 2529 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 2530 return AT->getElementType().getAddressSpace(); 2531 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 2532 return RT->getAddressSpace(); 2533 return 0; 2534} 2535 2536/// getObjCGCAttr - Return the gc attribute of this type. 2537inline Qualifiers::GC QualType::getObjCGCAttr() const { 2538 if (hasNonFastQualifiers()) { 2539 const ExtQuals *EQ = getExtQualsUnsafe(); 2540 if (EQ->hasObjCGCAttr()) 2541 return EQ->getObjCGCAttr(); 2542 } 2543 2544 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2545 if (CT.hasNonFastQualifiers()) { 2546 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 2547 if (EQ->hasObjCGCAttr()) 2548 return EQ->getObjCGCAttr(); 2549 } 2550 2551 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 2552 return AT->getElementType().getObjCGCAttr(); 2553 if (const ObjCObjectPointerType *PT = CT->getAs<ObjCObjectPointerType>()) 2554 return PT->getPointeeType().getObjCGCAttr(); 2555 // We most look at all pointer types, not just pointer to interface types. 2556 if (const PointerType *PT = CT->getAs<PointerType>()) 2557 return PT->getPointeeType().getObjCGCAttr(); 2558 return Qualifiers::GCNone; 2559} 2560 2561 /// getNoReturnAttr - Returns true if the type has the noreturn attribute, 2562 /// false otherwise. 2563inline bool QualType::getNoReturnAttr() const { 2564 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2565 if (const PointerType *PT = getTypePtr()->getAs<PointerType>()) { 2566 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 2567 return FT->getNoReturnAttr(); 2568 } else if (const FunctionType *FT = getTypePtr()->getAs<FunctionType>()) 2569 return FT->getNoReturnAttr(); 2570 2571 return false; 2572} 2573 2574/// isMoreQualifiedThan - Determine whether this type is more 2575/// qualified than the Other type. For example, "const volatile int" 2576/// is more qualified than "const int", "volatile int", and 2577/// "int". However, it is not more qualified than "const volatile 2578/// int". 2579inline bool QualType::isMoreQualifiedThan(QualType Other) const { 2580 // FIXME: work on arbitrary qualifiers 2581 unsigned MyQuals = this->getCVRQualifiers(); 2582 unsigned OtherQuals = Other.getCVRQualifiers(); 2583 if (getAddressSpace() != Other.getAddressSpace()) 2584 return false; 2585 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 2586} 2587 2588/// isAtLeastAsQualifiedAs - Determine whether this type is at last 2589/// as qualified as the Other type. For example, "const volatile 2590/// int" is at least as qualified as "const int", "volatile int", 2591/// "int", and "const volatile int". 2592inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 2593 // FIXME: work on arbitrary qualifiers 2594 unsigned MyQuals = this->getCVRQualifiers(); 2595 unsigned OtherQuals = Other.getCVRQualifiers(); 2596 if (getAddressSpace() != Other.getAddressSpace()) 2597 return false; 2598 return (MyQuals | OtherQuals) == MyQuals; 2599} 2600 2601/// getNonReferenceType - If Type is a reference type (e.g., const 2602/// int&), returns the type that the reference refers to ("const 2603/// int"). Otherwise, returns the type itself. This routine is used 2604/// throughout Sema to implement C++ 5p6: 2605/// 2606/// If an expression initially has the type "reference to T" (8.3.2, 2607/// 8.5.3), the type is adjusted to "T" prior to any further 2608/// analysis, the expression designates the object or function 2609/// denoted by the reference, and the expression is an lvalue. 2610inline QualType QualType::getNonReferenceType() const { 2611 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 2612 return RefType->getPointeeType(); 2613 else 2614 return *this; 2615} 2616 2617inline const ObjCInterfaceType *Type::getAsPointerToObjCInterfaceType() const { 2618 if (const PointerType *PT = getAs<PointerType>()) 2619 return PT->getPointeeType()->getAs<ObjCInterfaceType>(); 2620 return 0; 2621} 2622 2623// NOTE: All of these methods use "getUnqualifiedType" to strip off address 2624// space qualifiers if present. 2625inline bool Type::isFunctionType() const { 2626 return isa<FunctionType>(CanonicalType.getUnqualifiedType()); 2627} 2628inline bool Type::isPointerType() const { 2629 return isa<PointerType>(CanonicalType.getUnqualifiedType()); 2630} 2631inline bool Type::isAnyPointerType() const { 2632 return isPointerType() || isObjCObjectPointerType(); 2633} 2634inline bool Type::isBlockPointerType() const { 2635 return isa<BlockPointerType>(CanonicalType.getUnqualifiedType()); 2636} 2637inline bool Type::isReferenceType() const { 2638 return isa<ReferenceType>(CanonicalType.getUnqualifiedType()); 2639} 2640inline bool Type::isLValueReferenceType() const { 2641 return isa<LValueReferenceType>(CanonicalType.getUnqualifiedType()); 2642} 2643inline bool Type::isRValueReferenceType() const { 2644 return isa<RValueReferenceType>(CanonicalType.getUnqualifiedType()); 2645} 2646inline bool Type::isFunctionPointerType() const { 2647 if (const PointerType* T = getAs<PointerType>()) 2648 return T->getPointeeType()->isFunctionType(); 2649 else 2650 return false; 2651} 2652inline bool Type::isMemberPointerType() const { 2653 return isa<MemberPointerType>(CanonicalType.getUnqualifiedType()); 2654} 2655inline bool Type::isMemberFunctionPointerType() const { 2656 if (const MemberPointerType* T = getAs<MemberPointerType>()) 2657 return T->getPointeeType()->isFunctionType(); 2658 else 2659 return false; 2660} 2661inline bool Type::isArrayType() const { 2662 return isa<ArrayType>(CanonicalType.getUnqualifiedType()); 2663} 2664inline bool Type::isConstantArrayType() const { 2665 return isa<ConstantArrayType>(CanonicalType.getUnqualifiedType()); 2666} 2667inline bool Type::isIncompleteArrayType() const { 2668 return isa<IncompleteArrayType>(CanonicalType.getUnqualifiedType()); 2669} 2670inline bool Type::isVariableArrayType() const { 2671 return isa<VariableArrayType>(CanonicalType.getUnqualifiedType()); 2672} 2673inline bool Type::isDependentSizedArrayType() const { 2674 return isa<DependentSizedArrayType>(CanonicalType.getUnqualifiedType()); 2675} 2676inline bool Type::isRecordType() const { 2677 return isa<RecordType>(CanonicalType.getUnqualifiedType()); 2678} 2679inline bool Type::isAnyComplexType() const { 2680 return isa<ComplexType>(CanonicalType.getUnqualifiedType()); 2681} 2682inline bool Type::isVectorType() const { 2683 return isa<VectorType>(CanonicalType.getUnqualifiedType()); 2684} 2685inline bool Type::isExtVectorType() const { 2686 return isa<ExtVectorType>(CanonicalType.getUnqualifiedType()); 2687} 2688inline bool Type::isObjCObjectPointerType() const { 2689 return isa<ObjCObjectPointerType>(CanonicalType.getUnqualifiedType()); 2690} 2691inline bool Type::isObjCInterfaceType() const { 2692 return isa<ObjCInterfaceType>(CanonicalType.getUnqualifiedType()); 2693} 2694inline bool Type::isObjCQualifiedIdType() const { 2695 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 2696 return OPT->isObjCQualifiedIdType(); 2697 return false; 2698} 2699inline bool Type::isObjCQualifiedClassType() const { 2700 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 2701 return OPT->isObjCQualifiedClassType(); 2702 return false; 2703} 2704inline bool Type::isObjCIdType() const { 2705 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 2706 return OPT->isObjCIdType(); 2707 return false; 2708} 2709inline bool Type::isObjCClassType() const { 2710 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 2711 return OPT->isObjCClassType(); 2712 return false; 2713} 2714inline bool Type::isObjCBuiltinType() const { 2715 return isObjCIdType() || isObjCClassType(); 2716} 2717inline bool Type::isTemplateTypeParmType() const { 2718 return isa<TemplateTypeParmType>(CanonicalType.getUnqualifiedType()); 2719} 2720 2721inline bool Type::isSpecificBuiltinType(unsigned K) const { 2722 if (const BuiltinType *BT = getAs<BuiltinType>()) 2723 if (BT->getKind() == (BuiltinType::Kind) K) 2724 return true; 2725 return false; 2726} 2727 2728/// \brief Determines whether this is a type for which one can define 2729/// an overloaded operator. 2730inline bool Type::isOverloadableType() const { 2731 return isDependentType() || isRecordType() || isEnumeralType(); 2732} 2733 2734inline bool Type::hasPointerRepresentation() const { 2735 return (isPointerType() || isReferenceType() || isBlockPointerType() || 2736 isObjCInterfaceType() || isObjCObjectPointerType() || 2737 isObjCQualifiedInterfaceType() || isNullPtrType()); 2738} 2739 2740inline bool Type::hasObjCPointerRepresentation() const { 2741 return (isObjCInterfaceType() || isObjCObjectPointerType() || 2742 isObjCQualifiedInterfaceType()); 2743} 2744 2745/// Insertion operator for diagnostics. This allows sending QualType's into a 2746/// diagnostic with <<. 2747inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 2748 QualType T) { 2749 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 2750 Diagnostic::ak_qualtype); 2751 return DB; 2752} 2753 2754/// Member-template getAs<specific type>'. 2755template <typename T> const T *Type::getAs() const { 2756 // If this is directly a T type, return it. 2757 if (const T *Ty = dyn_cast<T>(this)) 2758 return Ty; 2759 2760 // If the canonical form of this type isn't the right kind, reject it. 2761 if (!isa<T>(CanonicalType)) 2762 return 0; 2763 2764 // If this is a typedef for the type, strip the typedef off without 2765 // losing all typedef information. 2766 return cast<T>(getDesugaredType()); 2767} 2768 2769} // end namespace clang 2770 2771#endif 2772