Type.h revision cca3b567dafc1d3125f476ae19bf82d84b16e4c1
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/Basic/Linkage.h" 20#include "clang/Basic/PartialDiagnostic.h" 21#include "clang/AST/NestedNameSpecifier.h" 22#include "clang/AST/TemplateName.h" 23#include "llvm/Support/Casting.h" 24#include "llvm/Support/type_traits.h" 25#include "llvm/ADT/APSInt.h" 26#include "llvm/ADT/FoldingSet.h" 27#include "llvm/ADT/PointerIntPair.h" 28#include "llvm/ADT/PointerUnion.h" 29 30using llvm::isa; 31using llvm::cast; 32using llvm::cast_or_null; 33using llvm::dyn_cast; 34using llvm::dyn_cast_or_null; 35namespace clang { 36 enum { 37 TypeAlignmentInBits = 3, 38 TypeAlignment = 1 << TypeAlignmentInBits 39 }; 40 class Type; 41 class ExtQuals; 42 class QualType; 43} 44 45namespace llvm { 46 template <typename T> 47 class PointerLikeTypeTraits; 48 template<> 49 class PointerLikeTypeTraits< ::clang::Type*> { 50 public: 51 static inline void *getAsVoidPointer(::clang::Type *P) { return P; } 52 static inline ::clang::Type *getFromVoidPointer(void *P) { 53 return static_cast< ::clang::Type*>(P); 54 } 55 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 56 }; 57 template<> 58 class PointerLikeTypeTraits< ::clang::ExtQuals*> { 59 public: 60 static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; } 61 static inline ::clang::ExtQuals *getFromVoidPointer(void *P) { 62 return static_cast< ::clang::ExtQuals*>(P); 63 } 64 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 65 }; 66 67 template <> 68 struct isPodLike<clang::QualType> { static const bool value = true; }; 69} 70 71namespace clang { 72 class ASTContext; 73 class TypedefDecl; 74 class TemplateDecl; 75 class TemplateTypeParmDecl; 76 class NonTypeTemplateParmDecl; 77 class TemplateTemplateParmDecl; 78 class TagDecl; 79 class RecordDecl; 80 class CXXRecordDecl; 81 class EnumDecl; 82 class FieldDecl; 83 class ObjCInterfaceDecl; 84 class ObjCProtocolDecl; 85 class ObjCMethodDecl; 86 class UnresolvedUsingTypenameDecl; 87 class Expr; 88 class Stmt; 89 class SourceLocation; 90 class StmtIteratorBase; 91 class TemplateArgument; 92 class TemplateArgumentLoc; 93 class TemplateArgumentListInfo; 94 class Type; 95 class ElaboratedType; 96 struct PrintingPolicy; 97 98 template <typename> class CanQual; 99 typedef CanQual<Type> CanQualType; 100 101 // Provide forward declarations for all of the *Type classes 102#define TYPE(Class, Base) class Class##Type; 103#include "clang/AST/TypeNodes.def" 104 105/// Qualifiers - The collection of all-type qualifiers we support. 106/// Clang supports five independent qualifiers: 107/// * C99: const, volatile, and restrict 108/// * Embedded C (TR18037): address spaces 109/// * Objective C: the GC attributes (none, weak, or strong) 110class Qualifiers { 111public: 112 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 113 Const = 0x1, 114 Restrict = 0x2, 115 Volatile = 0x4, 116 CVRMask = Const | Volatile | Restrict 117 }; 118 119 enum GC { 120 GCNone = 0, 121 Weak, 122 Strong 123 }; 124 125 enum { 126 /// The maximum supported address space number. 127 /// 24 bits should be enough for anyone. 128 MaxAddressSpace = 0xffffffu, 129 130 /// The width of the "fast" qualifier mask. 131 FastWidth = 2, 132 133 /// The fast qualifier mask. 134 FastMask = (1 << FastWidth) - 1 135 }; 136 137 Qualifiers() : Mask(0) {} 138 139 static Qualifiers fromFastMask(unsigned Mask) { 140 Qualifiers Qs; 141 Qs.addFastQualifiers(Mask); 142 return Qs; 143 } 144 145 static Qualifiers fromCVRMask(unsigned CVR) { 146 Qualifiers Qs; 147 Qs.addCVRQualifiers(CVR); 148 return Qs; 149 } 150 151 // Deserialize qualifiers from an opaque representation. 152 static Qualifiers fromOpaqueValue(unsigned opaque) { 153 Qualifiers Qs; 154 Qs.Mask = opaque; 155 return Qs; 156 } 157 158 // Serialize these qualifiers into an opaque representation. 159 unsigned getAsOpaqueValue() const { 160 return Mask; 161 } 162 163 bool hasConst() const { return Mask & Const; } 164 void setConst(bool flag) { 165 Mask = (Mask & ~Const) | (flag ? Const : 0); 166 } 167 void removeConst() { Mask &= ~Const; } 168 void addConst() { Mask |= Const; } 169 170 bool hasVolatile() const { return Mask & Volatile; } 171 void setVolatile(bool flag) { 172 Mask = (Mask & ~Volatile) | (flag ? Volatile : 0); 173 } 174 void removeVolatile() { Mask &= ~Volatile; } 175 void addVolatile() { Mask |= Volatile; } 176 177 bool hasRestrict() const { return Mask & Restrict; } 178 void setRestrict(bool flag) { 179 Mask = (Mask & ~Restrict) | (flag ? Restrict : 0); 180 } 181 void removeRestrict() { Mask &= ~Restrict; } 182 void addRestrict() { Mask |= Restrict; } 183 184 bool hasCVRQualifiers() const { return getCVRQualifiers(); } 185 unsigned getCVRQualifiers() const { return Mask & CVRMask; } 186 void setCVRQualifiers(unsigned mask) { 187 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 188 Mask = (Mask & ~CVRMask) | mask; 189 } 190 void removeCVRQualifiers(unsigned mask) { 191 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 192 Mask &= ~mask; 193 } 194 void removeCVRQualifiers() { 195 removeCVRQualifiers(CVRMask); 196 } 197 void addCVRQualifiers(unsigned mask) { 198 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 199 Mask |= mask; 200 } 201 202 bool hasObjCGCAttr() const { return Mask & GCAttrMask; } 203 GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); } 204 void setObjCGCAttr(GC type) { 205 Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift); 206 } 207 void removeObjCGCAttr() { setObjCGCAttr(GCNone); } 208 void addObjCGCAttr(GC type) { 209 assert(type); 210 setObjCGCAttr(type); 211 } 212 213 bool hasAddressSpace() const { return Mask & AddressSpaceMask; } 214 unsigned getAddressSpace() const { return Mask >> AddressSpaceShift; } 215 void setAddressSpace(unsigned space) { 216 assert(space <= MaxAddressSpace); 217 Mask = (Mask & ~AddressSpaceMask) 218 | (((uint32_t) space) << AddressSpaceShift); 219 } 220 void removeAddressSpace() { setAddressSpace(0); } 221 void addAddressSpace(unsigned space) { 222 assert(space); 223 setAddressSpace(space); 224 } 225 226 // Fast qualifiers are those that can be allocated directly 227 // on a QualType object. 228 bool hasFastQualifiers() const { return getFastQualifiers(); } 229 unsigned getFastQualifiers() const { return Mask & FastMask; } 230 void setFastQualifiers(unsigned mask) { 231 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 232 Mask = (Mask & ~FastMask) | mask; 233 } 234 void removeFastQualifiers(unsigned mask) { 235 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 236 Mask &= ~mask; 237 } 238 void removeFastQualifiers() { 239 removeFastQualifiers(FastMask); 240 } 241 void addFastQualifiers(unsigned mask) { 242 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 243 Mask |= mask; 244 } 245 246 /// hasNonFastQualifiers - Return true if the set contains any 247 /// qualifiers which require an ExtQuals node to be allocated. 248 bool hasNonFastQualifiers() const { return Mask & ~FastMask; } 249 Qualifiers getNonFastQualifiers() const { 250 Qualifiers Quals = *this; 251 Quals.setFastQualifiers(0); 252 return Quals; 253 } 254 255 /// hasQualifiers - Return true if the set contains any qualifiers. 256 bool hasQualifiers() const { return Mask; } 257 bool empty() const { return !Mask; } 258 259 /// \brief Add the qualifiers from the given set to this set. 260 void addQualifiers(Qualifiers Q) { 261 // If the other set doesn't have any non-boolean qualifiers, just 262 // bit-or it in. 263 if (!(Q.Mask & ~CVRMask)) 264 Mask |= Q.Mask; 265 else { 266 Mask |= (Q.Mask & CVRMask); 267 if (Q.hasAddressSpace()) 268 addAddressSpace(Q.getAddressSpace()); 269 if (Q.hasObjCGCAttr()) 270 addObjCGCAttr(Q.getObjCGCAttr()); 271 } 272 } 273 274 bool operator==(Qualifiers Other) const { return Mask == Other.Mask; } 275 bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; } 276 277 operator bool() const { return hasQualifiers(); } 278 279 Qualifiers &operator+=(Qualifiers R) { 280 addQualifiers(R); 281 return *this; 282 } 283 284 // Union two qualifier sets. If an enumerated qualifier appears 285 // in both sets, use the one from the right. 286 friend Qualifiers operator+(Qualifiers L, Qualifiers R) { 287 L += R; 288 return L; 289 } 290 291 std::string getAsString() const; 292 std::string getAsString(const PrintingPolicy &Policy) const { 293 std::string Buffer; 294 getAsStringInternal(Buffer, Policy); 295 return Buffer; 296 } 297 void getAsStringInternal(std::string &S, const PrintingPolicy &Policy) const; 298 299 void Profile(llvm::FoldingSetNodeID &ID) const { 300 ID.AddInteger(Mask); 301 } 302 303private: 304 305 // bits: |0 1 2|3 .. 4|5 .. 31| 306 // |C R V|GCAttr|AddrSpace| 307 uint32_t Mask; 308 309 static const uint32_t GCAttrMask = 0x18; 310 static const uint32_t GCAttrShift = 3; 311 static const uint32_t AddressSpaceMask = ~(CVRMask | GCAttrMask); 312 static const uint32_t AddressSpaceShift = 5; 313}; 314 315 316/// ExtQuals - We can encode up to three bits in the low bits of a 317/// type pointer, but there are many more type qualifiers that we want 318/// to be able to apply to an arbitrary type. Therefore we have this 319/// struct, intended to be heap-allocated and used by QualType to 320/// store qualifiers. 321/// 322/// The current design tags the 'const' and 'restrict' qualifiers in 323/// two low bits on the QualType pointer; a third bit records whether 324/// the pointer is an ExtQuals node. 'const' was chosen because it is 325/// orders of magnitude more common than the other two qualifiers, in 326/// both library and user code. It's relatively rare to see 327/// 'restrict' in user code, but many standard C headers are saturated 328/// with 'restrict' declarations, so that representing them efficiently 329/// is a critical goal of this representation. 330class ExtQuals : public llvm::FoldingSetNode { 331 // NOTE: changing the fast qualifiers should be straightforward as 332 // long as you don't make 'const' non-fast. 333 // 1. Qualifiers: 334 // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). 335 // Fast qualifiers must occupy the low-order bits. 336 // b) Update Qualifiers::FastWidth and FastMask. 337 // 2. QualType: 338 // a) Update is{Volatile,Restrict}Qualified(), defined inline. 339 // b) Update remove{Volatile,Restrict}, defined near the end of 340 // this header. 341 // 3. ASTContext: 342 // a) Update get{Volatile,Restrict}Type. 343 344 /// Context - the context to which this set belongs. We save this 345 /// here so that QualifierCollector can use it to reapply extended 346 /// qualifiers to an arbitrary type without requiring a context to 347 /// be pushed through every single API dealing with qualifiers. 348 ASTContext& Context; 349 350 /// BaseType - the underlying type that this qualifies 351 const Type *BaseType; 352 353 /// Quals - the immutable set of qualifiers applied by this 354 /// node; always contains extended qualifiers. 355 Qualifiers Quals; 356 357public: 358 ExtQuals(ASTContext& Context, const Type *Base, Qualifiers Quals) 359 : Context(Context), BaseType(Base), Quals(Quals) 360 { 361 assert(Quals.hasNonFastQualifiers() 362 && "ExtQuals created with no fast qualifiers"); 363 assert(!Quals.hasFastQualifiers() 364 && "ExtQuals created with fast qualifiers"); 365 } 366 367 Qualifiers getQualifiers() const { return Quals; } 368 369 bool hasVolatile() const { return Quals.hasVolatile(); } 370 371 bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } 372 Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } 373 374 bool hasAddressSpace() const { return Quals.hasAddressSpace(); } 375 unsigned getAddressSpace() const { return Quals.getAddressSpace(); } 376 377 const Type *getBaseType() const { return BaseType; } 378 379 ASTContext &getContext() const { return Context; } 380 381public: 382 void Profile(llvm::FoldingSetNodeID &ID) const { 383 Profile(ID, getBaseType(), Quals); 384 } 385 static void Profile(llvm::FoldingSetNodeID &ID, 386 const Type *BaseType, 387 Qualifiers Quals) { 388 assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!"); 389 ID.AddPointer(BaseType); 390 Quals.Profile(ID); 391 } 392}; 393 394/// CallingConv - Specifies the calling convention that a function uses. 395enum CallingConv { 396 CC_Default, 397 CC_C, // __attribute__((cdecl)) 398 CC_X86StdCall, // __attribute__((stdcall)) 399 CC_X86FastCall // __attribute__((fastcall)) 400}; 401 402 403/// QualType - For efficiency, we don't store CV-qualified types as nodes on 404/// their own: instead each reference to a type stores the qualifiers. This 405/// greatly reduces the number of nodes we need to allocate for types (for 406/// example we only need one for 'int', 'const int', 'volatile int', 407/// 'const volatile int', etc). 408/// 409/// As an added efficiency bonus, instead of making this a pair, we 410/// just store the two bits we care about in the low bits of the 411/// pointer. To handle the packing/unpacking, we make QualType be a 412/// simple wrapper class that acts like a smart pointer. A third bit 413/// indicates whether there are extended qualifiers present, in which 414/// case the pointer points to a special structure. 415class QualType { 416 // Thankfully, these are efficiently composable. 417 llvm::PointerIntPair<llvm::PointerUnion<const Type*,const ExtQuals*>, 418 Qualifiers::FastWidth> Value; 419 420 const ExtQuals *getExtQualsUnsafe() const { 421 return Value.getPointer().get<const ExtQuals*>(); 422 } 423 424 const Type *getTypePtrUnsafe() const { 425 return Value.getPointer().get<const Type*>(); 426 } 427 428 QualType getUnqualifiedTypeSlow() const; 429 430 friend class QualifierCollector; 431public: 432 QualType() {} 433 434 QualType(const Type *Ptr, unsigned Quals) 435 : Value(Ptr, Quals) {} 436 QualType(const ExtQuals *Ptr, unsigned Quals) 437 : Value(Ptr, Quals) {} 438 439 unsigned getLocalFastQualifiers() const { return Value.getInt(); } 440 void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); } 441 442 /// Retrieves a pointer to the underlying (unqualified) type. 443 /// This should really return a const Type, but it's not worth 444 /// changing all the users right now. 445 Type *getTypePtr() const { 446 if (hasLocalNonFastQualifiers()) 447 return const_cast<Type*>(getExtQualsUnsafe()->getBaseType()); 448 return const_cast<Type*>(getTypePtrUnsafe()); 449 } 450 451 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 452 static QualType getFromOpaquePtr(void *Ptr) { 453 QualType T; 454 T.Value.setFromOpaqueValue(Ptr); 455 return T; 456 } 457 458 Type &operator*() const { 459 return *getTypePtr(); 460 } 461 462 Type *operator->() const { 463 return getTypePtr(); 464 } 465 466 bool isCanonical() const; 467 bool isCanonicalAsParam() const; 468 469 /// isNull - Return true if this QualType doesn't point to a type yet. 470 bool isNull() const { 471 return Value.getPointer().isNull(); 472 } 473 474 /// \brief Determine whether this particular QualType instance has the 475 /// "const" qualifier set, without looking through typedefs that may have 476 /// added "const" at a different level. 477 bool isLocalConstQualified() const { 478 return (getLocalFastQualifiers() & Qualifiers::Const); 479 } 480 481 /// \brief Determine whether this type is const-qualified. 482 bool isConstQualified() const; 483 484 /// \brief Determine whether this particular QualType instance has the 485 /// "restrict" qualifier set, without looking through typedefs that may have 486 /// added "restrict" at a different level. 487 bool isLocalRestrictQualified() const { 488 return (getLocalFastQualifiers() & Qualifiers::Restrict); 489 } 490 491 /// \brief Determine whether this type is restrict-qualified. 492 bool isRestrictQualified() const; 493 494 /// \brief Determine whether this particular QualType instance has the 495 /// "volatile" qualifier set, without looking through typedefs that may have 496 /// added "volatile" at a different level. 497 bool isLocalVolatileQualified() const { 498 return (hasLocalNonFastQualifiers() && getExtQualsUnsafe()->hasVolatile()); 499 } 500 501 /// \brief Determine whether this type is volatile-qualified. 502 bool isVolatileQualified() const; 503 504 /// \brief Determine whether this particular QualType instance has any 505 /// qualifiers, without looking through any typedefs that might add 506 /// qualifiers at a different level. 507 bool hasLocalQualifiers() const { 508 return getLocalFastQualifiers() || hasLocalNonFastQualifiers(); 509 } 510 511 /// \brief Determine whether this type has any qualifiers. 512 bool hasQualifiers() const; 513 514 /// \brief Determine whether this particular QualType instance has any 515 /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType 516 /// instance. 517 bool hasLocalNonFastQualifiers() const { 518 return Value.getPointer().is<const ExtQuals*>(); 519 } 520 521 /// \brief Retrieve the set of qualifiers local to this particular QualType 522 /// instance, not including any qualifiers acquired through typedefs or 523 /// other sugar. 524 Qualifiers getLocalQualifiers() const { 525 Qualifiers Quals; 526 if (hasLocalNonFastQualifiers()) 527 Quals = getExtQualsUnsafe()->getQualifiers(); 528 Quals.addFastQualifiers(getLocalFastQualifiers()); 529 return Quals; 530 } 531 532 /// \brief Retrieve the set of qualifiers applied to this type. 533 Qualifiers getQualifiers() const; 534 535 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 536 /// local to this particular QualType instance, not including any qualifiers 537 /// acquired through typedefs or other sugar. 538 unsigned getLocalCVRQualifiers() const { 539 unsigned CVR = getLocalFastQualifiers(); 540 if (isLocalVolatileQualified()) 541 CVR |= Qualifiers::Volatile; 542 return CVR; 543 } 544 545 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 546 /// applied to this type. 547 unsigned getCVRQualifiers() const; 548 549 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 550 /// applied to this type, looking through any number of unqualified array 551 /// types to their element types' qualifiers. 552 unsigned getCVRQualifiersThroughArrayTypes() const; 553 554 bool isConstant(ASTContext& Ctx) const { 555 return QualType::isConstant(*this, Ctx); 556 } 557 558 // Don't promise in the API that anything besides 'const' can be 559 // easily added. 560 561 /// addConst - add the specified type qualifier to this QualType. 562 void addConst() { 563 addFastQualifiers(Qualifiers::Const); 564 } 565 QualType withConst() const { 566 return withFastQualifiers(Qualifiers::Const); 567 } 568 569 void addFastQualifiers(unsigned TQs) { 570 assert(!(TQs & ~Qualifiers::FastMask) 571 && "non-fast qualifier bits set in mask!"); 572 Value.setInt(Value.getInt() | TQs); 573 } 574 575 // FIXME: The remove* functions are semantically broken, because they might 576 // not remove a qualifier stored on a typedef. Most of the with* functions 577 // have the same problem. 578 void removeConst(); 579 void removeVolatile(); 580 void removeRestrict(); 581 void removeCVRQualifiers(unsigned Mask); 582 583 void removeFastQualifiers() { Value.setInt(0); } 584 void removeFastQualifiers(unsigned Mask) { 585 assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers"); 586 Value.setInt(Value.getInt() & ~Mask); 587 } 588 589 // Creates a type with the given qualifiers in addition to any 590 // qualifiers already on this type. 591 QualType withFastQualifiers(unsigned TQs) const { 592 QualType T = *this; 593 T.addFastQualifiers(TQs); 594 return T; 595 } 596 597 // Creates a type with exactly the given fast qualifiers, removing 598 // any existing fast qualifiers. 599 QualType withExactFastQualifiers(unsigned TQs) const { 600 return withoutFastQualifiers().withFastQualifiers(TQs); 601 } 602 603 // Removes fast qualifiers, but leaves any extended qualifiers in place. 604 QualType withoutFastQualifiers() const { 605 QualType T = *this; 606 T.removeFastQualifiers(); 607 return T; 608 } 609 610 /// \brief Return this type with all of the instance-specific qualifiers 611 /// removed, but without removing any qualifiers that may have been applied 612 /// through typedefs. 613 QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); } 614 615 /// \brief Return the unqualified form of the given type, which might be 616 /// desugared to eliminate qualifiers introduced via typedefs. 617 QualType getUnqualifiedType() const { 618 QualType T = getLocalUnqualifiedType(); 619 if (!T.hasQualifiers()) 620 return T; 621 622 return getUnqualifiedTypeSlow(); 623 } 624 625 bool isMoreQualifiedThan(QualType Other) const; 626 bool isAtLeastAsQualifiedAs(QualType Other) const; 627 QualType getNonReferenceType() const; 628 629 /// getDesugaredType - Return the specified type with any "sugar" removed from 630 /// the type. This takes off typedefs, typeof's etc. If the outer level of 631 /// the type is already concrete, it returns it unmodified. This is similar 632 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 633 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 634 /// concrete. 635 /// 636 /// Qualifiers are left in place. 637 QualType getDesugaredType() const { 638 return QualType::getDesugaredType(*this); 639 } 640 641 /// operator==/!= - Indicate whether the specified types and qualifiers are 642 /// identical. 643 friend bool operator==(const QualType &LHS, const QualType &RHS) { 644 return LHS.Value == RHS.Value; 645 } 646 friend bool operator!=(const QualType &LHS, const QualType &RHS) { 647 return LHS.Value != RHS.Value; 648 } 649 std::string getAsString() const; 650 651 std::string getAsString(const PrintingPolicy &Policy) const { 652 std::string S; 653 getAsStringInternal(S, Policy); 654 return S; 655 } 656 void getAsStringInternal(std::string &Str, 657 const PrintingPolicy &Policy) const; 658 659 void dump(const char *s) const; 660 void dump() const; 661 662 void Profile(llvm::FoldingSetNodeID &ID) const { 663 ID.AddPointer(getAsOpaquePtr()); 664 } 665 666 /// getAddressSpace - Return the address space of this type. 667 inline unsigned getAddressSpace() const; 668 669 /// GCAttrTypesAttr - Returns gc attribute of this type. 670 inline Qualifiers::GC getObjCGCAttr() const; 671 672 /// isObjCGCWeak true when Type is objc's weak. 673 bool isObjCGCWeak() const { 674 return getObjCGCAttr() == Qualifiers::Weak; 675 } 676 677 /// isObjCGCStrong true when Type is objc's strong. 678 bool isObjCGCStrong() const { 679 return getObjCGCAttr() == Qualifiers::Strong; 680 } 681 682private: 683 // These methods are implemented in a separate translation unit; 684 // "static"-ize them to avoid creating temporary QualTypes in the 685 // caller. 686 static bool isConstant(QualType T, ASTContext& Ctx); 687 static QualType getDesugaredType(QualType T); 688}; 689 690} // end clang. 691 692namespace llvm { 693/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 694/// to a specific Type class. 695template<> struct simplify_type<const ::clang::QualType> { 696 typedef ::clang::Type* SimpleType; 697 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 698 return Val.getTypePtr(); 699 } 700}; 701template<> struct simplify_type< ::clang::QualType> 702 : public simplify_type<const ::clang::QualType> {}; 703 704// Teach SmallPtrSet that QualType is "basically a pointer". 705template<> 706class PointerLikeTypeTraits<clang::QualType> { 707public: 708 static inline void *getAsVoidPointer(clang::QualType P) { 709 return P.getAsOpaquePtr(); 710 } 711 static inline clang::QualType getFromVoidPointer(void *P) { 712 return clang::QualType::getFromOpaquePtr(P); 713 } 714 // Various qualifiers go in low bits. 715 enum { NumLowBitsAvailable = 0 }; 716}; 717 718} // end namespace llvm 719 720namespace clang { 721 722/// Type - This is the base class of the type hierarchy. A central concept 723/// with types is that each type always has a canonical type. A canonical type 724/// is the type with any typedef names stripped out of it or the types it 725/// references. For example, consider: 726/// 727/// typedef int foo; 728/// typedef foo* bar; 729/// 'int *' 'foo *' 'bar' 730/// 731/// There will be a Type object created for 'int'. Since int is canonical, its 732/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 733/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 734/// there is a PointerType that represents 'int*', which, like 'int', is 735/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 736/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 737/// is also 'int*'. 738/// 739/// Non-canonical types are useful for emitting diagnostics, without losing 740/// information about typedefs being used. Canonical types are useful for type 741/// comparisons (they allow by-pointer equality tests) and useful for reasoning 742/// about whether something has a particular form (e.g. is a function type), 743/// because they implicitly, recursively, strip all typedefs out of a type. 744/// 745/// Types, once created, are immutable. 746/// 747class Type { 748public: 749 enum TypeClass { 750#define TYPE(Class, Base) Class, 751#define LAST_TYPE(Class) TypeLast = Class, 752#define ABSTRACT_TYPE(Class, Base) 753#include "clang/AST/TypeNodes.def" 754 TagFirst = Record, TagLast = Enum 755 }; 756 757private: 758 Type(const Type&); // DO NOT IMPLEMENT. 759 void operator=(const Type&); // DO NOT IMPLEMENT. 760 761 QualType CanonicalType; 762 763 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 764 unsigned TC : 8; 765 766 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 767 /// Note that this should stay at the end of the ivars for Type so that 768 /// subclasses can pack their bitfields into the same word. 769 bool Dependent : 1; 770 771protected: 772 enum { BitsRemainingInType = 23 }; 773 774 // silence VC++ warning C4355: 'this' : used in base member initializer list 775 Type *this_() { return this; } 776 Type(TypeClass tc, QualType Canonical, bool dependent) 777 : CanonicalType(Canonical.isNull() ? QualType(this_(), 0) : Canonical), 778 TC(tc), Dependent(dependent) {} 779 virtual ~Type() {} 780 virtual void Destroy(ASTContext& C); 781 friend class ASTContext; 782 783public: 784 TypeClass getTypeClass() const { return static_cast<TypeClass>(TC); } 785 786 bool isCanonicalUnqualified() const { 787 return CanonicalType.getTypePtr() == this; 788 } 789 790 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 791 /// object types, function types, and incomplete types. 792 793 /// \brief Determines whether the type describes an object in memory. 794 /// 795 /// Note that this definition of object type corresponds to the C++ 796 /// definition of object type, which includes incomplete types, as 797 /// opposed to the C definition (which does not include incomplete 798 /// types). 799 bool isObjectType() const; 800 801 /// isIncompleteType - Return true if this is an incomplete type. 802 /// A type that can describe objects, but which lacks information needed to 803 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 804 /// routine will need to determine if the size is actually required. 805 bool isIncompleteType() const; 806 807 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 808 /// type, in other words, not a function type. 809 bool isIncompleteOrObjectType() const { 810 return !isFunctionType(); 811 } 812 813 /// isPODType - Return true if this is a plain-old-data type (C++ 3.9p10). 814 bool isPODType() const; 815 816 /// isLiteralType - Return true if this is a literal type 817 /// (C++0x [basic.types]p10) 818 bool isLiteralType() const; 819 820 /// isVariablyModifiedType (C99 6.7.5.2p2) - Return true for variable array 821 /// types that have a non-constant expression. This does not include "[]". 822 bool isVariablyModifiedType() const; 823 824 /// Helper methods to distinguish type categories. All type predicates 825 /// operate on the canonical type, ignoring typedefs and qualifiers. 826 827 /// isSpecificBuiltinType - Test for a particular builtin type. 828 bool isSpecificBuiltinType(unsigned K) const; 829 830 /// isIntegerType() does *not* include complex integers (a GCC extension). 831 /// isComplexIntegerType() can be used to test for complex integers. 832 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 833 bool isEnumeralType() const; 834 bool isBooleanType() const; 835 bool isCharType() const; 836 bool isWideCharType() const; 837 bool isAnyCharacterType() const; 838 bool isIntegralType() const; 839 840 /// Floating point categories. 841 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 842 /// isComplexType() does *not* include complex integers (a GCC extension). 843 /// isComplexIntegerType() can be used to test for complex integers. 844 bool isComplexType() const; // C99 6.2.5p11 (complex) 845 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 846 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 847 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 848 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 849 bool isVoidType() const; // C99 6.2.5p19 850 bool isDerivedType() const; // C99 6.2.5p20 851 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 852 bool isAggregateType() const; 853 854 // Type Predicates: Check to see if this type is structurally the specified 855 // type, ignoring typedefs and qualifiers. 856 bool isFunctionType() const; 857 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 858 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 859 bool isPointerType() const; 860 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 861 bool isBlockPointerType() const; 862 bool isVoidPointerType() const; 863 bool isReferenceType() const; 864 bool isLValueReferenceType() const; 865 bool isRValueReferenceType() const; 866 bool isFunctionPointerType() const; 867 bool isMemberPointerType() const; 868 bool isMemberFunctionPointerType() const; 869 bool isArrayType() const; 870 bool isConstantArrayType() const; 871 bool isIncompleteArrayType() const; 872 bool isVariableArrayType() const; 873 bool isDependentSizedArrayType() const; 874 bool isRecordType() const; 875 bool isClassType() const; 876 bool isStructureType() const; 877 bool isStructureOrClassType() const; 878 bool isUnionType() const; 879 bool isComplexIntegerType() const; // GCC _Complex integer type. 880 bool isVectorType() const; // GCC vector type. 881 bool isExtVectorType() const; // Extended vector type. 882 bool isObjCObjectPointerType() const; // Pointer to *any* ObjC object. 883 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 884 // for the common case. 885 bool isObjCObjectType() const; // NSString or typeof(*(id)0) 886 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 887 bool isObjCQualifiedIdType() const; // id<foo> 888 bool isObjCQualifiedClassType() const; // Class<foo> 889 bool isObjCIdType() const; // id 890 bool isObjCClassType() const; // Class 891 bool isObjCSelType() const; // Class 892 bool isObjCBuiltinType() const; // 'id' or 'Class' 893 bool isTemplateTypeParmType() const; // C++ template type parameter 894 bool isNullPtrType() const; // C++0x nullptr_t 895 896 /// isDependentType - Whether this type is a dependent type, meaning 897 /// that its definition somehow depends on a template parameter 898 /// (C++ [temp.dep.type]). 899 bool isDependentType() const { return Dependent; } 900 bool isOverloadableType() const; 901 902 /// \brief Determine wither this type is a C++ elaborated-type-specifier. 903 bool isElaboratedTypeSpecifier() const; 904 905 /// hasPointerRepresentation - Whether this type is represented 906 /// natively as a pointer; this includes pointers, references, block 907 /// pointers, and Objective-C interface, qualified id, and qualified 908 /// interface types, as well as nullptr_t. 909 bool hasPointerRepresentation() const; 910 911 /// hasObjCPointerRepresentation - Whether this type can represent 912 /// an objective pointer type for the purpose of GC'ability 913 bool hasObjCPointerRepresentation() const; 914 915 // Type Checking Functions: Check to see if this type is structurally the 916 // specified type, ignoring typedefs and qualifiers, and return a pointer to 917 // the best type we can. 918 const RecordType *getAsStructureType() const; 919 /// NOTE: getAs*ArrayType are methods on ASTContext. 920 const RecordType *getAsUnionType() const; 921 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 922 // The following is a convenience method that returns an ObjCObjectPointerType 923 // for object declared using an interface. 924 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 925 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 926 const ObjCObjectType *getAsObjCQualifiedInterfaceType() const; 927 const CXXRecordDecl *getCXXRecordDeclForPointerType() const; 928 929 /// \brief Retrieves the CXXRecordDecl that this type refers to, either 930 /// because the type is a RecordType or because it is the injected-class-name 931 /// type of a class template or class template partial specialization. 932 CXXRecordDecl *getAsCXXRecordDecl() const; 933 934 // Member-template getAs<specific type>'. This scheme will eventually 935 // replace the specific getAsXXXX methods above. 936 // 937 // There are some specializations of this member template listed 938 // immediately following this class. 939 template <typename T> const T *getAs() const; 940 941 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 942 /// element type of the array, potentially with type qualifiers missing. 943 /// This method should never be used when type qualifiers are meaningful. 944 const Type *getArrayElementTypeNoTypeQual() const; 945 946 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 947 /// pointer, this returns the respective pointee. 948 QualType getPointeeType() const; 949 950 /// getUnqualifiedDesugaredType() - Return the specified type with 951 /// any "sugar" removed from the type, removing any typedefs, 952 /// typeofs, etc., as well as any qualifiers. 953 const Type *getUnqualifiedDesugaredType() const; 954 955 /// More type predicates useful for type checking/promotion 956 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 957 958 /// isSignedIntegerType - Return true if this is an integer type that is 959 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 960 /// an enum decl which has a signed representation, or a vector of signed 961 /// integer element type. 962 bool isSignedIntegerType() const; 963 964 /// isUnsignedIntegerType - Return true if this is an integer type that is 965 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 966 /// decl which has an unsigned representation, or a vector of unsigned integer 967 /// element type. 968 bool isUnsignedIntegerType() const; 969 970 /// isConstantSizeType - Return true if this is not a variable sized type, 971 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 972 /// incomplete types. 973 bool isConstantSizeType() const; 974 975 /// isSpecifierType - Returns true if this type can be represented by some 976 /// set of type specifiers. 977 bool isSpecifierType() const; 978 979 const char *getTypeClassName() const; 980 981 /// \brief Determine the linkage of this type. 982 virtual Linkage getLinkage() const; 983 984 QualType getCanonicalTypeInternal() const { 985 return CanonicalType; 986 } 987 CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h 988 void dump() const; 989 static bool classof(const Type *) { return true; } 990}; 991 992template <> inline const TypedefType *Type::getAs() const { 993 return dyn_cast<TypedefType>(this); 994} 995 996// We can do canonical leaf types faster, because we don't have to 997// worry about preserving child type decoration. 998#define TYPE(Class, Base) 999#define LEAF_TYPE(Class) \ 1000template <> inline const Class##Type *Type::getAs() const { \ 1001 return dyn_cast<Class##Type>(CanonicalType); \ 1002} 1003#include "clang/AST/TypeNodes.def" 1004 1005 1006/// BuiltinType - This class is used for builtin types like 'int'. Builtin 1007/// types are always canonical and have a literal name field. 1008class BuiltinType : public Type { 1009public: 1010 enum Kind { 1011 Void, 1012 1013 Bool, // This is bool and/or _Bool. 1014 Char_U, // This is 'char' for targets where char is unsigned. 1015 UChar, // This is explicitly qualified unsigned char. 1016 Char16, // This is 'char16_t' for C++. 1017 Char32, // This is 'char32_t' for C++. 1018 UShort, 1019 UInt, 1020 ULong, 1021 ULongLong, 1022 UInt128, // __uint128_t 1023 1024 Char_S, // This is 'char' for targets where char is signed. 1025 SChar, // This is explicitly qualified signed char. 1026 WChar, // This is 'wchar_t' for C++. 1027 Short, 1028 Int, 1029 Long, 1030 LongLong, 1031 Int128, // __int128_t 1032 1033 Float, Double, LongDouble, 1034 1035 NullPtr, // This is the type of C++0x 'nullptr'. 1036 1037 Overload, // This represents the type of an overloaded function declaration. 1038 Dependent, // This represents the type of a type-dependent expression. 1039 1040 UndeducedAuto, // In C++0x, this represents the type of an auto variable 1041 // that has not been deduced yet. 1042 1043 /// The primitive Objective C 'id' type. The type pointed to by the 1044 /// user-visible 'id' type. Only ever shows up in an AST as the base 1045 /// type of an ObjCObjectType. 1046 ObjCId, 1047 1048 /// The primitive Objective C 'Class' type. The type pointed to by the 1049 /// user-visible 'Class' type. Only ever shows up in an AST as the 1050 /// base type of an ObjCObjectType. 1051 ObjCClass, 1052 1053 ObjCSel // This represents the ObjC 'SEL' type. 1054 }; 1055private: 1056 Kind TypeKind; 1057public: 1058 BuiltinType(Kind K) 1059 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent)), 1060 TypeKind(K) {} 1061 1062 Kind getKind() const { return TypeKind; } 1063 const char *getName(const LangOptions &LO) const; 1064 1065 bool isSugared() const { return false; } 1066 QualType desugar() const { return QualType(this, 0); } 1067 1068 bool isInteger() const { 1069 return TypeKind >= Bool && TypeKind <= Int128; 1070 } 1071 1072 bool isSignedInteger() const { 1073 return TypeKind >= Char_S && TypeKind <= Int128; 1074 } 1075 1076 bool isUnsignedInteger() const { 1077 return TypeKind >= Bool && TypeKind <= UInt128; 1078 } 1079 1080 bool isFloatingPoint() const { 1081 return TypeKind >= Float && TypeKind <= LongDouble; 1082 } 1083 1084 virtual Linkage getLinkage() const; 1085 1086 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1087 static bool classof(const BuiltinType *) { return true; } 1088}; 1089 1090/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1091/// types (_Complex float etc) as well as the GCC integer complex extensions. 1092/// 1093class ComplexType : public Type, public llvm::FoldingSetNode { 1094 QualType ElementType; 1095 ComplexType(QualType Element, QualType CanonicalPtr) : 1096 Type(Complex, CanonicalPtr, Element->isDependentType()), 1097 ElementType(Element) { 1098 } 1099 friend class ASTContext; // ASTContext creates these. 1100public: 1101 QualType getElementType() const { return ElementType; } 1102 1103 bool isSugared() const { return false; } 1104 QualType desugar() const { return QualType(this, 0); } 1105 1106 void Profile(llvm::FoldingSetNodeID &ID) { 1107 Profile(ID, getElementType()); 1108 } 1109 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1110 ID.AddPointer(Element.getAsOpaquePtr()); 1111 } 1112 1113 virtual Linkage getLinkage() const; 1114 1115 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1116 static bool classof(const ComplexType *) { return true; } 1117}; 1118 1119/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1120/// 1121class PointerType : public Type, public llvm::FoldingSetNode { 1122 QualType PointeeType; 1123 1124 PointerType(QualType Pointee, QualType CanonicalPtr) : 1125 Type(Pointer, CanonicalPtr, Pointee->isDependentType()), PointeeType(Pointee) { 1126 } 1127 friend class ASTContext; // ASTContext creates these. 1128public: 1129 1130 QualType getPointeeType() const { return PointeeType; } 1131 1132 bool isSugared() const { return false; } 1133 QualType desugar() const { return QualType(this, 0); } 1134 1135 void Profile(llvm::FoldingSetNodeID &ID) { 1136 Profile(ID, getPointeeType()); 1137 } 1138 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1139 ID.AddPointer(Pointee.getAsOpaquePtr()); 1140 } 1141 1142 virtual Linkage getLinkage() const; 1143 1144 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1145 static bool classof(const PointerType *) { return true; } 1146}; 1147 1148/// BlockPointerType - pointer to a block type. 1149/// This type is to represent types syntactically represented as 1150/// "void (^)(int)", etc. Pointee is required to always be a function type. 1151/// 1152class BlockPointerType : public Type, public llvm::FoldingSetNode { 1153 QualType PointeeType; // Block is some kind of pointer type 1154 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1155 Type(BlockPointer, CanonicalCls, Pointee->isDependentType()), 1156 PointeeType(Pointee) { 1157 } 1158 friend class ASTContext; // ASTContext creates these. 1159public: 1160 1161 // Get the pointee type. Pointee is required to always be a function type. 1162 QualType getPointeeType() const { return PointeeType; } 1163 1164 bool isSugared() const { return false; } 1165 QualType desugar() const { return QualType(this, 0); } 1166 1167 void Profile(llvm::FoldingSetNodeID &ID) { 1168 Profile(ID, getPointeeType()); 1169 } 1170 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1171 ID.AddPointer(Pointee.getAsOpaquePtr()); 1172 } 1173 1174 virtual Linkage getLinkage() const; 1175 1176 static bool classof(const Type *T) { 1177 return T->getTypeClass() == BlockPointer; 1178 } 1179 static bool classof(const BlockPointerType *) { return true; } 1180}; 1181 1182/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 1183/// 1184class ReferenceType : public Type, public llvm::FoldingSetNode { 1185 QualType PointeeType; 1186 1187 /// True if the type was originally spelled with an lvalue sigil. 1188 /// This is never true of rvalue references but can also be false 1189 /// on lvalue references because of C++0x [dcl.typedef]p9, 1190 /// as follows: 1191 /// 1192 /// typedef int &ref; // lvalue, spelled lvalue 1193 /// typedef int &&rvref; // rvalue 1194 /// ref &a; // lvalue, inner ref, spelled lvalue 1195 /// ref &&a; // lvalue, inner ref 1196 /// rvref &a; // lvalue, inner ref, spelled lvalue 1197 /// rvref &&a; // rvalue, inner ref 1198 bool SpelledAsLValue; 1199 1200 /// True if the inner type is a reference type. This only happens 1201 /// in non-canonical forms. 1202 bool InnerRef; 1203 1204protected: 1205 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 1206 bool SpelledAsLValue) : 1207 Type(tc, CanonicalRef, Referencee->isDependentType()), 1208 PointeeType(Referencee), SpelledAsLValue(SpelledAsLValue), 1209 InnerRef(Referencee->isReferenceType()) { 1210 } 1211public: 1212 bool isSpelledAsLValue() const { return SpelledAsLValue; } 1213 bool isInnerRef() const { return InnerRef; } 1214 1215 QualType getPointeeTypeAsWritten() const { return PointeeType; } 1216 QualType getPointeeType() const { 1217 // FIXME: this might strip inner qualifiers; okay? 1218 const ReferenceType *T = this; 1219 while (T->InnerRef) 1220 T = T->PointeeType->getAs<ReferenceType>(); 1221 return T->PointeeType; 1222 } 1223 1224 void Profile(llvm::FoldingSetNodeID &ID) { 1225 Profile(ID, PointeeType, SpelledAsLValue); 1226 } 1227 static void Profile(llvm::FoldingSetNodeID &ID, 1228 QualType Referencee, 1229 bool SpelledAsLValue) { 1230 ID.AddPointer(Referencee.getAsOpaquePtr()); 1231 ID.AddBoolean(SpelledAsLValue); 1232 } 1233 1234 virtual Linkage getLinkage() const; 1235 1236 static bool classof(const Type *T) { 1237 return T->getTypeClass() == LValueReference || 1238 T->getTypeClass() == RValueReference; 1239 } 1240 static bool classof(const ReferenceType *) { return true; } 1241}; 1242 1243/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 1244/// 1245class LValueReferenceType : public ReferenceType { 1246 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 1247 bool SpelledAsLValue) : 1248 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 1249 {} 1250 friend class ASTContext; // ASTContext creates these 1251public: 1252 bool isSugared() const { return false; } 1253 QualType desugar() const { return QualType(this, 0); } 1254 1255 static bool classof(const Type *T) { 1256 return T->getTypeClass() == LValueReference; 1257 } 1258 static bool classof(const LValueReferenceType *) { return true; } 1259}; 1260 1261/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 1262/// 1263class RValueReferenceType : public ReferenceType { 1264 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 1265 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 1266 } 1267 friend class ASTContext; // ASTContext creates these 1268public: 1269 bool isSugared() const { return false; } 1270 QualType desugar() const { return QualType(this, 0); } 1271 1272 static bool classof(const Type *T) { 1273 return T->getTypeClass() == RValueReference; 1274 } 1275 static bool classof(const RValueReferenceType *) { return true; } 1276}; 1277 1278/// MemberPointerType - C++ 8.3.3 - Pointers to members 1279/// 1280class MemberPointerType : public Type, public llvm::FoldingSetNode { 1281 QualType PointeeType; 1282 /// The class of which the pointee is a member. Must ultimately be a 1283 /// RecordType, but could be a typedef or a template parameter too. 1284 const Type *Class; 1285 1286 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 1287 Type(MemberPointer, CanonicalPtr, 1288 Cls->isDependentType() || Pointee->isDependentType()), 1289 PointeeType(Pointee), Class(Cls) { 1290 } 1291 friend class ASTContext; // ASTContext creates these. 1292public: 1293 1294 QualType getPointeeType() const { return PointeeType; } 1295 1296 const Type *getClass() const { return Class; } 1297 1298 bool isSugared() const { return false; } 1299 QualType desugar() const { return QualType(this, 0); } 1300 1301 void Profile(llvm::FoldingSetNodeID &ID) { 1302 Profile(ID, getPointeeType(), getClass()); 1303 } 1304 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 1305 const Type *Class) { 1306 ID.AddPointer(Pointee.getAsOpaquePtr()); 1307 ID.AddPointer(Class); 1308 } 1309 1310 virtual Linkage getLinkage() const; 1311 1312 static bool classof(const Type *T) { 1313 return T->getTypeClass() == MemberPointer; 1314 } 1315 static bool classof(const MemberPointerType *) { return true; } 1316}; 1317 1318/// ArrayType - C99 6.7.5.2 - Array Declarators. 1319/// 1320class ArrayType : public Type, public llvm::FoldingSetNode { 1321public: 1322 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 1323 /// an array with a static size (e.g. int X[static 4]), or an array 1324 /// with a star size (e.g. int X[*]). 1325 /// 'static' is only allowed on function parameters. 1326 enum ArraySizeModifier { 1327 Normal, Static, Star 1328 }; 1329private: 1330 /// ElementType - The element type of the array. 1331 QualType ElementType; 1332 1333 // NOTE: VC++ treats enums as signed, avoid using the ArraySizeModifier enum 1334 /// NOTE: These fields are packed into the bitfields space in the Type class. 1335 unsigned SizeModifier : 2; 1336 1337 /// IndexTypeQuals - Capture qualifiers in declarations like: 1338 /// 'int X[static restrict 4]'. For function parameters only. 1339 unsigned IndexTypeQuals : 3; 1340 1341protected: 1342 // C++ [temp.dep.type]p1: 1343 // A type is dependent if it is... 1344 // - an array type constructed from any dependent type or whose 1345 // size is specified by a constant expression that is 1346 // value-dependent, 1347 ArrayType(TypeClass tc, QualType et, QualType can, 1348 ArraySizeModifier sm, unsigned tq) 1349 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray), 1350 ElementType(et), SizeModifier(sm), IndexTypeQuals(tq) {} 1351 1352 friend class ASTContext; // ASTContext creates these. 1353public: 1354 QualType getElementType() const { return ElementType; } 1355 ArraySizeModifier getSizeModifier() const { 1356 return ArraySizeModifier(SizeModifier); 1357 } 1358 Qualifiers getIndexTypeQualifiers() const { 1359 return Qualifiers::fromCVRMask(IndexTypeQuals); 1360 } 1361 unsigned getIndexTypeCVRQualifiers() const { return IndexTypeQuals; } 1362 1363 virtual Linkage getLinkage() const; 1364 1365 static bool classof(const Type *T) { 1366 return T->getTypeClass() == ConstantArray || 1367 T->getTypeClass() == VariableArray || 1368 T->getTypeClass() == IncompleteArray || 1369 T->getTypeClass() == DependentSizedArray; 1370 } 1371 static bool classof(const ArrayType *) { return true; } 1372}; 1373 1374/// ConstantArrayType - This class represents the canonical version of 1375/// C arrays with a specified constant size. For example, the canonical 1376/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 1377/// type is 'int' and the size is 404. 1378class ConstantArrayType : public ArrayType { 1379 llvm::APInt Size; // Allows us to unique the type. 1380 1381 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 1382 ArraySizeModifier sm, unsigned tq) 1383 : ArrayType(ConstantArray, et, can, sm, tq), 1384 Size(size) {} 1385protected: 1386 ConstantArrayType(TypeClass tc, QualType et, QualType can, 1387 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 1388 : ArrayType(tc, et, can, sm, tq), Size(size) {} 1389 friend class ASTContext; // ASTContext creates these. 1390public: 1391 const llvm::APInt &getSize() const { return Size; } 1392 bool isSugared() const { return false; } 1393 QualType desugar() const { return QualType(this, 0); } 1394 1395 void Profile(llvm::FoldingSetNodeID &ID) { 1396 Profile(ID, getElementType(), getSize(), 1397 getSizeModifier(), getIndexTypeCVRQualifiers()); 1398 } 1399 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1400 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 1401 unsigned TypeQuals) { 1402 ID.AddPointer(ET.getAsOpaquePtr()); 1403 ID.AddInteger(ArraySize.getZExtValue()); 1404 ID.AddInteger(SizeMod); 1405 ID.AddInteger(TypeQuals); 1406 } 1407 static bool classof(const Type *T) { 1408 return T->getTypeClass() == ConstantArray; 1409 } 1410 static bool classof(const ConstantArrayType *) { return true; } 1411}; 1412 1413/// IncompleteArrayType - This class represents C arrays with an unspecified 1414/// size. For example 'int A[]' has an IncompleteArrayType where the element 1415/// type is 'int' and the size is unspecified. 1416class IncompleteArrayType : public ArrayType { 1417 1418 IncompleteArrayType(QualType et, QualType can, 1419 ArraySizeModifier sm, unsigned tq) 1420 : ArrayType(IncompleteArray, et, can, sm, tq) {} 1421 friend class ASTContext; // ASTContext creates these. 1422public: 1423 bool isSugared() const { return false; } 1424 QualType desugar() const { return QualType(this, 0); } 1425 1426 static bool classof(const Type *T) { 1427 return T->getTypeClass() == IncompleteArray; 1428 } 1429 static bool classof(const IncompleteArrayType *) { return true; } 1430 1431 friend class StmtIteratorBase; 1432 1433 void Profile(llvm::FoldingSetNodeID &ID) { 1434 Profile(ID, getElementType(), getSizeModifier(), 1435 getIndexTypeCVRQualifiers()); 1436 } 1437 1438 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1439 ArraySizeModifier SizeMod, unsigned TypeQuals) { 1440 ID.AddPointer(ET.getAsOpaquePtr()); 1441 ID.AddInteger(SizeMod); 1442 ID.AddInteger(TypeQuals); 1443 } 1444}; 1445 1446/// VariableArrayType - This class represents C arrays with a specified size 1447/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 1448/// Since the size expression is an arbitrary expression, we store it as such. 1449/// 1450/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 1451/// should not be: two lexically equivalent variable array types could mean 1452/// different things, for example, these variables do not have the same type 1453/// dynamically: 1454/// 1455/// void foo(int x) { 1456/// int Y[x]; 1457/// ++x; 1458/// int Z[x]; 1459/// } 1460/// 1461class VariableArrayType : public ArrayType { 1462 /// SizeExpr - An assignment expression. VLA's are only permitted within 1463 /// a function block. 1464 Stmt *SizeExpr; 1465 /// Brackets - The left and right array brackets. 1466 SourceRange Brackets; 1467 1468 VariableArrayType(QualType et, QualType can, Expr *e, 1469 ArraySizeModifier sm, unsigned tq, 1470 SourceRange brackets) 1471 : ArrayType(VariableArray, et, can, sm, tq), 1472 SizeExpr((Stmt*) e), Brackets(brackets) {} 1473 friend class ASTContext; // ASTContext creates these. 1474 virtual void Destroy(ASTContext& C); 1475 1476public: 1477 Expr *getSizeExpr() const { 1478 // We use C-style casts instead of cast<> here because we do not wish 1479 // to have a dependency of Type.h on Stmt.h/Expr.h. 1480 return (Expr*) SizeExpr; 1481 } 1482 SourceRange getBracketsRange() const { return Brackets; } 1483 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1484 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1485 1486 bool isSugared() const { return false; } 1487 QualType desugar() const { return QualType(this, 0); } 1488 1489 static bool classof(const Type *T) { 1490 return T->getTypeClass() == VariableArray; 1491 } 1492 static bool classof(const VariableArrayType *) { return true; } 1493 1494 friend class StmtIteratorBase; 1495 1496 void Profile(llvm::FoldingSetNodeID &ID) { 1497 assert(0 && "Cannnot unique VariableArrayTypes."); 1498 } 1499}; 1500 1501/// DependentSizedArrayType - This type represents an array type in 1502/// C++ whose size is a value-dependent expression. For example: 1503/// 1504/// \code 1505/// template<typename T, int Size> 1506/// class array { 1507/// T data[Size]; 1508/// }; 1509/// \endcode 1510/// 1511/// For these types, we won't actually know what the array bound is 1512/// until template instantiation occurs, at which point this will 1513/// become either a ConstantArrayType or a VariableArrayType. 1514class DependentSizedArrayType : public ArrayType { 1515 ASTContext &Context; 1516 1517 /// \brief An assignment expression that will instantiate to the 1518 /// size of the array. 1519 /// 1520 /// The expression itself might be NULL, in which case the array 1521 /// type will have its size deduced from an initializer. 1522 Stmt *SizeExpr; 1523 1524 /// Brackets - The left and right array brackets. 1525 SourceRange Brackets; 1526 1527 DependentSizedArrayType(ASTContext &Context, QualType et, QualType can, 1528 Expr *e, ArraySizeModifier sm, unsigned tq, 1529 SourceRange brackets) 1530 : ArrayType(DependentSizedArray, et, can, sm, tq), 1531 Context(Context), SizeExpr((Stmt*) e), Brackets(brackets) {} 1532 friend class ASTContext; // ASTContext creates these. 1533 virtual void Destroy(ASTContext& C); 1534 1535public: 1536 Expr *getSizeExpr() const { 1537 // We use C-style casts instead of cast<> here because we do not wish 1538 // to have a dependency of Type.h on Stmt.h/Expr.h. 1539 return (Expr*) SizeExpr; 1540 } 1541 SourceRange getBracketsRange() const { return Brackets; } 1542 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1543 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1544 1545 bool isSugared() const { return false; } 1546 QualType desugar() const { return QualType(this, 0); } 1547 1548 static bool classof(const Type *T) { 1549 return T->getTypeClass() == DependentSizedArray; 1550 } 1551 static bool classof(const DependentSizedArrayType *) { return true; } 1552 1553 friend class StmtIteratorBase; 1554 1555 1556 void Profile(llvm::FoldingSetNodeID &ID) { 1557 Profile(ID, Context, getElementType(), 1558 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 1559 } 1560 1561 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1562 QualType ET, ArraySizeModifier SizeMod, 1563 unsigned TypeQuals, Expr *E); 1564}; 1565 1566/// DependentSizedExtVectorType - This type represent an extended vector type 1567/// where either the type or size is dependent. For example: 1568/// @code 1569/// template<typename T, int Size> 1570/// class vector { 1571/// typedef T __attribute__((ext_vector_type(Size))) type; 1572/// } 1573/// @endcode 1574class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 1575 ASTContext &Context; 1576 Expr *SizeExpr; 1577 /// ElementType - The element type of the array. 1578 QualType ElementType; 1579 SourceLocation loc; 1580 1581 DependentSizedExtVectorType(ASTContext &Context, QualType ElementType, 1582 QualType can, Expr *SizeExpr, SourceLocation loc) 1583 : Type (DependentSizedExtVector, can, true), 1584 Context(Context), SizeExpr(SizeExpr), ElementType(ElementType), 1585 loc(loc) {} 1586 friend class ASTContext; 1587 virtual void Destroy(ASTContext& C); 1588 1589public: 1590 Expr *getSizeExpr() const { return SizeExpr; } 1591 QualType getElementType() const { return ElementType; } 1592 SourceLocation getAttributeLoc() const { return loc; } 1593 1594 bool isSugared() const { return false; } 1595 QualType desugar() const { return QualType(this, 0); } 1596 1597 static bool classof(const Type *T) { 1598 return T->getTypeClass() == DependentSizedExtVector; 1599 } 1600 static bool classof(const DependentSizedExtVectorType *) { return true; } 1601 1602 void Profile(llvm::FoldingSetNodeID &ID) { 1603 Profile(ID, Context, getElementType(), getSizeExpr()); 1604 } 1605 1606 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1607 QualType ElementType, Expr *SizeExpr); 1608}; 1609 1610 1611/// VectorType - GCC generic vector type. This type is created using 1612/// __attribute__((vector_size(n)), where "n" specifies the vector size in 1613/// bytes; or from an Altivec __vector or vector declaration. 1614/// Since the constructor takes the number of vector elements, the 1615/// client is responsible for converting the size into the number of elements. 1616class VectorType : public Type, public llvm::FoldingSetNode { 1617protected: 1618 /// ElementType - The element type of the vector. 1619 QualType ElementType; 1620 1621 /// NumElements - The number of elements in the vector. 1622 unsigned NumElements; 1623 1624 /// AltiVec - True if this is for an Altivec vector. 1625 bool AltiVec; 1626 1627 /// Pixel - True if this is for an Altivec vector pixel. 1628 bool Pixel; 1629 1630 VectorType(QualType vecType, unsigned nElements, QualType canonType, 1631 bool isAltiVec, bool isPixel) : 1632 Type(Vector, canonType, vecType->isDependentType()), 1633 ElementType(vecType), NumElements(nElements), 1634 AltiVec(isAltiVec), Pixel(isPixel) {} 1635 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 1636 QualType canonType, bool isAltiVec, bool isPixel) 1637 : Type(tc, canonType, vecType->isDependentType()), ElementType(vecType), 1638 NumElements(nElements), AltiVec(isAltiVec), Pixel(isPixel) {} 1639 friend class ASTContext; // ASTContext creates these. 1640public: 1641 1642 QualType getElementType() const { return ElementType; } 1643 unsigned getNumElements() const { return NumElements; } 1644 1645 bool isSugared() const { return false; } 1646 QualType desugar() const { return QualType(this, 0); } 1647 1648 bool isAltiVec() const { return AltiVec; } 1649 1650 bool isPixel() const { return Pixel; } 1651 1652 void Profile(llvm::FoldingSetNodeID &ID) { 1653 Profile(ID, getElementType(), getNumElements(), getTypeClass(), 1654 AltiVec, Pixel); 1655 } 1656 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 1657 unsigned NumElements, TypeClass TypeClass, 1658 bool isAltiVec, bool isPixel) { 1659 ID.AddPointer(ElementType.getAsOpaquePtr()); 1660 ID.AddInteger(NumElements); 1661 ID.AddInteger(TypeClass); 1662 ID.AddBoolean(isAltiVec); 1663 ID.AddBoolean(isPixel); 1664 } 1665 1666 virtual Linkage getLinkage() const; 1667 1668 static bool classof(const Type *T) { 1669 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 1670 } 1671 static bool classof(const VectorType *) { return true; } 1672}; 1673 1674/// ExtVectorType - Extended vector type. This type is created using 1675/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 1676/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 1677/// class enables syntactic extensions, like Vector Components for accessing 1678/// points, colors, and textures (modeled after OpenGL Shading Language). 1679class ExtVectorType : public VectorType { 1680 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 1681 VectorType(ExtVector, vecType, nElements, canonType, false, false) {} 1682 friend class ASTContext; // ASTContext creates these. 1683public: 1684 static int getPointAccessorIdx(char c) { 1685 switch (c) { 1686 default: return -1; 1687 case 'x': return 0; 1688 case 'y': return 1; 1689 case 'z': return 2; 1690 case 'w': return 3; 1691 } 1692 } 1693 static int getNumericAccessorIdx(char c) { 1694 switch (c) { 1695 default: return -1; 1696 case '0': return 0; 1697 case '1': return 1; 1698 case '2': return 2; 1699 case '3': return 3; 1700 case '4': return 4; 1701 case '5': return 5; 1702 case '6': return 6; 1703 case '7': return 7; 1704 case '8': return 8; 1705 case '9': return 9; 1706 case 'A': 1707 case 'a': return 10; 1708 case 'B': 1709 case 'b': return 11; 1710 case 'C': 1711 case 'c': return 12; 1712 case 'D': 1713 case 'd': return 13; 1714 case 'E': 1715 case 'e': return 14; 1716 case 'F': 1717 case 'f': return 15; 1718 } 1719 } 1720 1721 static int getAccessorIdx(char c) { 1722 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 1723 return getNumericAccessorIdx(c); 1724 } 1725 1726 bool isAccessorWithinNumElements(char c) const { 1727 if (int idx = getAccessorIdx(c)+1) 1728 return unsigned(idx-1) < NumElements; 1729 return false; 1730 } 1731 bool isSugared() const { return false; } 1732 QualType desugar() const { return QualType(this, 0); } 1733 1734 static bool classof(const Type *T) { 1735 return T->getTypeClass() == ExtVector; 1736 } 1737 static bool classof(const ExtVectorType *) { return true; } 1738}; 1739 1740/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 1741/// class of FunctionNoProtoType and FunctionProtoType. 1742/// 1743class FunctionType : public Type { 1744 virtual void ANCHOR(); // Key function for FunctionType. 1745 1746 /// SubClassData - This field is owned by the subclass, put here to pack 1747 /// tightly with the ivars in Type. 1748 bool SubClassData : 1; 1749 1750 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1751 /// other bitfields. 1752 /// The qualifiers are part of FunctionProtoType because... 1753 /// 1754 /// C++ 8.3.5p4: The return type, the parameter type list and the 1755 /// cv-qualifier-seq, [...], are part of the function type. 1756 /// 1757 unsigned TypeQuals : 3; 1758 1759 /// NoReturn - Indicates if the function type is attribute noreturn. 1760 unsigned NoReturn : 1; 1761 1762 /// RegParm - How many arguments to pass inreg. 1763 unsigned RegParm : 3; 1764 1765 /// CallConv - The calling convention used by the function. 1766 unsigned CallConv : 2; 1767 1768 // The type returned by the function. 1769 QualType ResultType; 1770 1771 public: 1772 // This class is used for passing arround the information needed to 1773 // construct a call. It is not actually used for storage, just for 1774 // factoring together common arguments. 1775 // If you add a field (say Foo), other than the obvious places (both, constructors, 1776 // compile failures), what you need to update is 1777 // * Operetor== 1778 // * getFoo 1779 // * withFoo 1780 // * functionType. Add Foo, getFoo. 1781 // * ASTContext::getFooType 1782 // * ASTContext::mergeFunctionTypes 1783 // * FunctionNoProtoType::Profile 1784 // * FunctionProtoType::Profile 1785 // * TypePrinter::PrintFunctionProto 1786 // * PCH read and write 1787 // * Codegen 1788 1789 class ExtInfo { 1790 public: 1791 // Constructor with no defaults. Use this when you know that you 1792 // have all the elements (when reading a PCH file for example). 1793 ExtInfo(bool noReturn, unsigned regParm, CallingConv cc) : 1794 NoReturn(noReturn), RegParm(regParm), CC(cc) {} 1795 1796 // Constructor with all defaults. Use when for example creating a 1797 // function know to use defaults. 1798 ExtInfo() : NoReturn(false), RegParm(0), CC(CC_Default) {} 1799 1800 bool getNoReturn() const { return NoReturn; } 1801 unsigned getRegParm() const { return RegParm; } 1802 CallingConv getCC() const { return CC; } 1803 1804 bool operator==(const ExtInfo &Other) const { 1805 return getNoReturn() == Other.getNoReturn() && 1806 getRegParm() == Other.getRegParm() && 1807 getCC() == Other.getCC(); 1808 } 1809 bool operator!=(const ExtInfo &Other) const { 1810 return !(*this == Other); 1811 } 1812 1813 // Note that we don't have setters. That is by design, use 1814 // the following with methods instead of mutating these objects. 1815 1816 ExtInfo withNoReturn(bool noReturn) const { 1817 return ExtInfo(noReturn, getRegParm(), getCC()); 1818 } 1819 1820 ExtInfo withRegParm(unsigned RegParm) const { 1821 return ExtInfo(getNoReturn(), RegParm, getCC()); 1822 } 1823 1824 ExtInfo withCallingConv(CallingConv cc) const { 1825 return ExtInfo(getNoReturn(), getRegParm(), cc); 1826 } 1827 1828 private: 1829 // True if we have __attribute__((noreturn)) 1830 bool NoReturn; 1831 // The value passed to __attribute__((regparm(x))) 1832 unsigned RegParm; 1833 // The calling convention as specified via 1834 // __attribute__((cdecl|stdcall||fastcall)) 1835 CallingConv CC; 1836 }; 1837 1838protected: 1839 FunctionType(TypeClass tc, QualType res, bool SubclassInfo, 1840 unsigned typeQuals, QualType Canonical, bool Dependent, 1841 const ExtInfo &Info) 1842 : Type(tc, Canonical, Dependent), 1843 SubClassData(SubclassInfo), TypeQuals(typeQuals), 1844 NoReturn(Info.getNoReturn()), 1845 RegParm(Info.getRegParm()), CallConv(Info.getCC()), ResultType(res) {} 1846 bool getSubClassData() const { return SubClassData; } 1847 unsigned getTypeQuals() const { return TypeQuals; } 1848public: 1849 1850 QualType getResultType() const { return ResultType; } 1851 unsigned getRegParmType() const { return RegParm; } 1852 bool getNoReturnAttr() const { return NoReturn; } 1853 CallingConv getCallConv() const { return (CallingConv)CallConv; } 1854 ExtInfo getExtInfo() const { 1855 return ExtInfo(NoReturn, RegParm, (CallingConv)CallConv); 1856 } 1857 1858 static llvm::StringRef getNameForCallConv(CallingConv CC); 1859 1860 static bool classof(const Type *T) { 1861 return T->getTypeClass() == FunctionNoProto || 1862 T->getTypeClass() == FunctionProto; 1863 } 1864 static bool classof(const FunctionType *) { return true; } 1865}; 1866 1867/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 1868/// no information available about its arguments. 1869class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 1870 FunctionNoProtoType(QualType Result, QualType Canonical, 1871 const ExtInfo &Info) 1872 : FunctionType(FunctionNoProto, Result, false, 0, Canonical, 1873 /*Dependent=*/false, Info) {} 1874 friend class ASTContext; // ASTContext creates these. 1875public: 1876 // No additional state past what FunctionType provides. 1877 1878 bool isSugared() const { return false; } 1879 QualType desugar() const { return QualType(this, 0); } 1880 1881 void Profile(llvm::FoldingSetNodeID &ID) { 1882 Profile(ID, getResultType(), getExtInfo()); 1883 } 1884 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 1885 const ExtInfo &Info) { 1886 ID.AddInteger(Info.getCC()); 1887 ID.AddInteger(Info.getRegParm()); 1888 ID.AddInteger(Info.getNoReturn()); 1889 ID.AddPointer(ResultType.getAsOpaquePtr()); 1890 } 1891 1892 virtual Linkage getLinkage() const; 1893 1894 static bool classof(const Type *T) { 1895 return T->getTypeClass() == FunctionNoProto; 1896 } 1897 static bool classof(const FunctionNoProtoType *) { return true; } 1898}; 1899 1900/// FunctionProtoType - Represents a prototype with argument type info, e.g. 1901/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 1902/// arguments, not as having a single void argument. Such a type can have an 1903/// exception specification, but this specification is not part of the canonical 1904/// type. 1905class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 1906 /// hasAnyDependentType - Determine whether there are any dependent 1907 /// types within the arguments passed in. 1908 static bool hasAnyDependentType(const QualType *ArgArray, unsigned numArgs) { 1909 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 1910 if (ArgArray[Idx]->isDependentType()) 1911 return true; 1912 1913 return false; 1914 } 1915 1916 FunctionProtoType(QualType Result, const QualType *ArgArray, unsigned numArgs, 1917 bool isVariadic, unsigned typeQuals, bool hasExs, 1918 bool hasAnyExs, const QualType *ExArray, 1919 unsigned numExs, QualType Canonical, 1920 const ExtInfo &Info) 1921 : FunctionType(FunctionProto, Result, isVariadic, typeQuals, Canonical, 1922 (Result->isDependentType() || 1923 hasAnyDependentType(ArgArray, numArgs)), 1924 Info), 1925 NumArgs(numArgs), NumExceptions(numExs), HasExceptionSpec(hasExs), 1926 AnyExceptionSpec(hasAnyExs) { 1927 // Fill in the trailing argument array. 1928 QualType *ArgInfo = reinterpret_cast<QualType*>(this+1); 1929 for (unsigned i = 0; i != numArgs; ++i) 1930 ArgInfo[i] = ArgArray[i]; 1931 // Fill in the exception array. 1932 QualType *Ex = ArgInfo + numArgs; 1933 for (unsigned i = 0; i != numExs; ++i) 1934 Ex[i] = ExArray[i]; 1935 } 1936 1937 /// NumArgs - The number of arguments this function has, not counting '...'. 1938 unsigned NumArgs : 20; 1939 1940 /// NumExceptions - The number of types in the exception spec, if any. 1941 unsigned NumExceptions : 10; 1942 1943 /// HasExceptionSpec - Whether this function has an exception spec at all. 1944 bool HasExceptionSpec : 1; 1945 1946 /// AnyExceptionSpec - Whether this function has a throw(...) spec. 1947 bool AnyExceptionSpec : 1; 1948 1949 /// ArgInfo - There is an variable size array after the class in memory that 1950 /// holds the argument types. 1951 1952 /// Exceptions - There is another variable size array after ArgInfo that 1953 /// holds the exception types. 1954 1955 friend class ASTContext; // ASTContext creates these. 1956 1957public: 1958 unsigned getNumArgs() const { return NumArgs; } 1959 QualType getArgType(unsigned i) const { 1960 assert(i < NumArgs && "Invalid argument number!"); 1961 return arg_type_begin()[i]; 1962 } 1963 1964 bool hasExceptionSpec() const { return HasExceptionSpec; } 1965 bool hasAnyExceptionSpec() const { return AnyExceptionSpec; } 1966 unsigned getNumExceptions() const { return NumExceptions; } 1967 QualType getExceptionType(unsigned i) const { 1968 assert(i < NumExceptions && "Invalid exception number!"); 1969 return exception_begin()[i]; 1970 } 1971 bool hasEmptyExceptionSpec() const { 1972 return hasExceptionSpec() && !hasAnyExceptionSpec() && 1973 getNumExceptions() == 0; 1974 } 1975 1976 bool isVariadic() const { return getSubClassData(); } 1977 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 1978 1979 typedef const QualType *arg_type_iterator; 1980 arg_type_iterator arg_type_begin() const { 1981 return reinterpret_cast<const QualType *>(this+1); 1982 } 1983 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 1984 1985 typedef const QualType *exception_iterator; 1986 exception_iterator exception_begin() const { 1987 // exceptions begin where arguments end 1988 return arg_type_end(); 1989 } 1990 exception_iterator exception_end() const { 1991 return exception_begin() + NumExceptions; 1992 } 1993 1994 bool isSugared() const { return false; } 1995 QualType desugar() const { return QualType(this, 0); } 1996 1997 virtual Linkage getLinkage() const; 1998 1999 static bool classof(const Type *T) { 2000 return T->getTypeClass() == FunctionProto; 2001 } 2002 static bool classof(const FunctionProtoType *) { return true; } 2003 2004 void Profile(llvm::FoldingSetNodeID &ID); 2005 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 2006 arg_type_iterator ArgTys, unsigned NumArgs, 2007 bool isVariadic, unsigned TypeQuals, 2008 bool hasExceptionSpec, bool anyExceptionSpec, 2009 unsigned NumExceptions, exception_iterator Exs, 2010 const ExtInfo &ExtInfo); 2011}; 2012 2013 2014/// \brief Represents the dependent type named by a dependently-scoped 2015/// typename using declaration, e.g. 2016/// using typename Base<T>::foo; 2017/// Template instantiation turns these into the underlying type. 2018class UnresolvedUsingType : public Type { 2019 UnresolvedUsingTypenameDecl *Decl; 2020 2021 UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) 2022 : Type(UnresolvedUsing, QualType(), true), 2023 Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} 2024 friend class ASTContext; // ASTContext creates these. 2025public: 2026 2027 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 2028 2029 bool isSugared() const { return false; } 2030 QualType desugar() const { return QualType(this, 0); } 2031 2032 static bool classof(const Type *T) { 2033 return T->getTypeClass() == UnresolvedUsing; 2034 } 2035 static bool classof(const UnresolvedUsingType *) { return true; } 2036 2037 void Profile(llvm::FoldingSetNodeID &ID) { 2038 return Profile(ID, Decl); 2039 } 2040 static void Profile(llvm::FoldingSetNodeID &ID, 2041 UnresolvedUsingTypenameDecl *D) { 2042 ID.AddPointer(D); 2043 } 2044}; 2045 2046 2047class TypedefType : public Type { 2048 TypedefDecl *Decl; 2049protected: 2050 TypedefType(TypeClass tc, const TypedefDecl *D, QualType can) 2051 : Type(tc, can, can->isDependentType()), 2052 Decl(const_cast<TypedefDecl*>(D)) { 2053 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2054 } 2055 friend class ASTContext; // ASTContext creates these. 2056public: 2057 2058 TypedefDecl *getDecl() const { return Decl; } 2059 2060 /// LookThroughTypedefs - Return the ultimate type this typedef corresponds to 2061 /// potentially looking through *all* consecutive typedefs. This returns the 2062 /// sum of the type qualifiers, so if you have: 2063 /// typedef const int A; 2064 /// typedef volatile A B; 2065 /// looking through the typedefs for B will give you "const volatile A". 2066 QualType LookThroughTypedefs() const; 2067 2068 bool isSugared() const { return true; } 2069 QualType desugar() const; 2070 2071 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 2072 static bool classof(const TypedefType *) { return true; } 2073}; 2074 2075/// TypeOfExprType (GCC extension). 2076class TypeOfExprType : public Type { 2077 Expr *TOExpr; 2078 2079protected: 2080 TypeOfExprType(Expr *E, QualType can = QualType()); 2081 friend class ASTContext; // ASTContext creates these. 2082public: 2083 Expr *getUnderlyingExpr() const { return TOExpr; } 2084 2085 /// \brief Remove a single level of sugar. 2086 QualType desugar() const; 2087 2088 /// \brief Returns whether this type directly provides sugar. 2089 bool isSugared() const { return true; } 2090 2091 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 2092 static bool classof(const TypeOfExprType *) { return true; } 2093}; 2094 2095/// \brief Internal representation of canonical, dependent 2096/// typeof(expr) types. 2097/// 2098/// This class is used internally by the ASTContext to manage 2099/// canonical, dependent types, only. Clients will only see instances 2100/// of this class via TypeOfExprType nodes. 2101class DependentTypeOfExprType 2102 : public TypeOfExprType, public llvm::FoldingSetNode { 2103 ASTContext &Context; 2104 2105public: 2106 DependentTypeOfExprType(ASTContext &Context, Expr *E) 2107 : TypeOfExprType(E), Context(Context) { } 2108 2109 bool isSugared() const { return false; } 2110 QualType desugar() const { return QualType(this, 0); } 2111 2112 void Profile(llvm::FoldingSetNodeID &ID) { 2113 Profile(ID, Context, getUnderlyingExpr()); 2114 } 2115 2116 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2117 Expr *E); 2118}; 2119 2120/// TypeOfType (GCC extension). 2121class TypeOfType : public Type { 2122 QualType TOType; 2123 TypeOfType(QualType T, QualType can) 2124 : Type(TypeOf, can, T->isDependentType()), TOType(T) { 2125 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2126 } 2127 friend class ASTContext; // ASTContext creates these. 2128public: 2129 QualType getUnderlyingType() const { return TOType; } 2130 2131 /// \brief Remove a single level of sugar. 2132 QualType desugar() const { return getUnderlyingType(); } 2133 2134 /// \brief Returns whether this type directly provides sugar. 2135 bool isSugared() const { return true; } 2136 2137 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 2138 static bool classof(const TypeOfType *) { return true; } 2139}; 2140 2141/// DecltypeType (C++0x) 2142class DecltypeType : public Type { 2143 Expr *E; 2144 2145 // FIXME: We could get rid of UnderlyingType if we wanted to: We would have to 2146 // Move getDesugaredType to ASTContext so that it can call getDecltypeForExpr 2147 // from it. 2148 QualType UnderlyingType; 2149 2150protected: 2151 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 2152 friend class ASTContext; // ASTContext creates these. 2153public: 2154 Expr *getUnderlyingExpr() const { return E; } 2155 QualType getUnderlyingType() const { return UnderlyingType; } 2156 2157 /// \brief Remove a single level of sugar. 2158 QualType desugar() const { return getUnderlyingType(); } 2159 2160 /// \brief Returns whether this type directly provides sugar. 2161 bool isSugared() const { return !isDependentType(); } 2162 2163 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 2164 static bool classof(const DecltypeType *) { return true; } 2165}; 2166 2167/// \brief Internal representation of canonical, dependent 2168/// decltype(expr) types. 2169/// 2170/// This class is used internally by the ASTContext to manage 2171/// canonical, dependent types, only. Clients will only see instances 2172/// of this class via DecltypeType nodes. 2173class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 2174 ASTContext &Context; 2175 2176public: 2177 DependentDecltypeType(ASTContext &Context, Expr *E); 2178 2179 bool isSugared() const { return false; } 2180 QualType desugar() const { return QualType(this, 0); } 2181 2182 void Profile(llvm::FoldingSetNodeID &ID) { 2183 Profile(ID, Context, getUnderlyingExpr()); 2184 } 2185 2186 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2187 Expr *E); 2188}; 2189 2190class TagType : public Type { 2191 /// Stores the TagDecl associated with this type. The decl will 2192 /// point to the TagDecl that actually defines the entity (or is a 2193 /// definition in progress), if there is such a definition. The 2194 /// single-bit value will be non-zero when this tag is in the 2195 /// process of being defined. 2196 mutable llvm::PointerIntPair<TagDecl *, 1> decl; 2197 friend class ASTContext; 2198 friend class TagDecl; 2199 2200protected: 2201 TagType(TypeClass TC, const TagDecl *D, QualType can); 2202 2203public: 2204 TagDecl *getDecl() const { return decl.getPointer(); } 2205 2206 /// @brief Determines whether this type is in the process of being 2207 /// defined. 2208 bool isBeingDefined() const { return decl.getInt(); } 2209 void setBeingDefined(bool Def) const { decl.setInt(Def? 1 : 0); } 2210 2211 virtual Linkage getLinkage() const; 2212 2213 static bool classof(const Type *T) { 2214 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 2215 } 2216 static bool classof(const TagType *) { return true; } 2217 static bool classof(const RecordType *) { return true; } 2218 static bool classof(const EnumType *) { return true; } 2219}; 2220 2221/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 2222/// to detect TagType objects of structs/unions/classes. 2223class RecordType : public TagType { 2224protected: 2225 explicit RecordType(const RecordDecl *D) 2226 : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2227 explicit RecordType(TypeClass TC, RecordDecl *D) 2228 : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2229 friend class ASTContext; // ASTContext creates these. 2230public: 2231 2232 RecordDecl *getDecl() const { 2233 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 2234 } 2235 2236 // FIXME: This predicate is a helper to QualType/Type. It needs to 2237 // recursively check all fields for const-ness. If any field is declared 2238 // const, it needs to return false. 2239 bool hasConstFields() const { return false; } 2240 2241 // FIXME: RecordType needs to check when it is created that all fields are in 2242 // the same address space, and return that. 2243 unsigned getAddressSpace() const { return 0; } 2244 2245 bool isSugared() const { return false; } 2246 QualType desugar() const { return QualType(this, 0); } 2247 2248 static bool classof(const TagType *T); 2249 static bool classof(const Type *T) { 2250 return isa<TagType>(T) && classof(cast<TagType>(T)); 2251 } 2252 static bool classof(const RecordType *) { return true; } 2253}; 2254 2255/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 2256/// to detect TagType objects of enums. 2257class EnumType : public TagType { 2258 explicit EnumType(const EnumDecl *D) 2259 : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2260 friend class ASTContext; // ASTContext creates these. 2261public: 2262 2263 EnumDecl *getDecl() const { 2264 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 2265 } 2266 2267 bool isSugared() const { return false; } 2268 QualType desugar() const { return QualType(this, 0); } 2269 2270 static bool classof(const TagType *T); 2271 static bool classof(const Type *T) { 2272 return isa<TagType>(T) && classof(cast<TagType>(T)); 2273 } 2274 static bool classof(const EnumType *) { return true; } 2275}; 2276 2277class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2278 unsigned Depth : 15; 2279 unsigned Index : 16; 2280 unsigned ParameterPack : 1; 2281 IdentifierInfo *Name; 2282 2283 TemplateTypeParmType(unsigned D, unsigned I, bool PP, IdentifierInfo *N, 2284 QualType Canon) 2285 : Type(TemplateTypeParm, Canon, /*Dependent=*/true), 2286 Depth(D), Index(I), ParameterPack(PP), Name(N) { } 2287 2288 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 2289 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true), 2290 Depth(D), Index(I), ParameterPack(PP), Name(0) { } 2291 2292 friend class ASTContext; // ASTContext creates these 2293 2294public: 2295 unsigned getDepth() const { return Depth; } 2296 unsigned getIndex() const { return Index; } 2297 bool isParameterPack() const { return ParameterPack; } 2298 IdentifierInfo *getName() const { return Name; } 2299 2300 bool isSugared() const { return false; } 2301 QualType desugar() const { return QualType(this, 0); } 2302 2303 void Profile(llvm::FoldingSetNodeID &ID) { 2304 Profile(ID, Depth, Index, ParameterPack, Name); 2305 } 2306 2307 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 2308 unsigned Index, bool ParameterPack, 2309 IdentifierInfo *Name) { 2310 ID.AddInteger(Depth); 2311 ID.AddInteger(Index); 2312 ID.AddBoolean(ParameterPack); 2313 ID.AddPointer(Name); 2314 } 2315 2316 static bool classof(const Type *T) { 2317 return T->getTypeClass() == TemplateTypeParm; 2318 } 2319 static bool classof(const TemplateTypeParmType *T) { return true; } 2320}; 2321 2322/// \brief Represents the result of substituting a type for a template 2323/// type parameter. 2324/// 2325/// Within an instantiated template, all template type parameters have 2326/// been replaced with these. They are used solely to record that a 2327/// type was originally written as a template type parameter; 2328/// therefore they are never canonical. 2329class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2330 // The original type parameter. 2331 const TemplateTypeParmType *Replaced; 2332 2333 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 2334 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType()), 2335 Replaced(Param) { } 2336 2337 friend class ASTContext; 2338 2339public: 2340 IdentifierInfo *getName() const { return Replaced->getName(); } 2341 2342 /// Gets the template parameter that was substituted for. 2343 const TemplateTypeParmType *getReplacedParameter() const { 2344 return Replaced; 2345 } 2346 2347 /// Gets the type that was substituted for the template 2348 /// parameter. 2349 QualType getReplacementType() const { 2350 return getCanonicalTypeInternal(); 2351 } 2352 2353 bool isSugared() const { return true; } 2354 QualType desugar() const { return getReplacementType(); } 2355 2356 void Profile(llvm::FoldingSetNodeID &ID) { 2357 Profile(ID, getReplacedParameter(), getReplacementType()); 2358 } 2359 static void Profile(llvm::FoldingSetNodeID &ID, 2360 const TemplateTypeParmType *Replaced, 2361 QualType Replacement) { 2362 ID.AddPointer(Replaced); 2363 ID.AddPointer(Replacement.getAsOpaquePtr()); 2364 } 2365 2366 static bool classof(const Type *T) { 2367 return T->getTypeClass() == SubstTemplateTypeParm; 2368 } 2369 static bool classof(const SubstTemplateTypeParmType *T) { return true; } 2370}; 2371 2372/// \brief Represents the type of a template specialization as written 2373/// in the source code. 2374/// 2375/// Template specialization types represent the syntactic form of a 2376/// template-id that refers to a type, e.g., @c vector<int>. Some 2377/// template specialization types are syntactic sugar, whose canonical 2378/// type will point to some other type node that represents the 2379/// instantiation or class template specialization. For example, a 2380/// class template specialization type of @c vector<int> will refer to 2381/// a tag type for the instantiation 2382/// @c std::vector<int, std::allocator<int>>. 2383/// 2384/// Other template specialization types, for which the template name 2385/// is dependent, may be canonical types. These types are always 2386/// dependent. 2387class TemplateSpecializationType 2388 : public Type, public llvm::FoldingSetNode { 2389 2390 // The ASTContext is currently needed in order to profile expressions. 2391 // FIXME: avoid this. 2392 // 2393 // The bool is whether this is a current instantiation. 2394 llvm::PointerIntPair<ASTContext*, 1, bool> ContextAndCurrentInstantiation; 2395 2396 /// \brief The name of the template being specialized. 2397 TemplateName Template; 2398 2399 /// \brief - The number of template arguments named in this class 2400 /// template specialization. 2401 unsigned NumArgs; 2402 2403 TemplateSpecializationType(ASTContext &Context, 2404 TemplateName T, 2405 bool IsCurrentInstantiation, 2406 const TemplateArgument *Args, 2407 unsigned NumArgs, QualType Canon); 2408 2409 virtual void Destroy(ASTContext& C); 2410 2411 friend class ASTContext; // ASTContext creates these 2412 2413public: 2414 /// \brief Determine whether any of the given template arguments are 2415 /// dependent. 2416 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 2417 unsigned NumArgs); 2418 2419 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 2420 unsigned NumArgs); 2421 2422 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &); 2423 2424 /// \brief Print a template argument list, including the '<' and '>' 2425 /// enclosing the template arguments. 2426 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 2427 unsigned NumArgs, 2428 const PrintingPolicy &Policy); 2429 2430 static std::string PrintTemplateArgumentList(const TemplateArgumentLoc *Args, 2431 unsigned NumArgs, 2432 const PrintingPolicy &Policy); 2433 2434 static std::string PrintTemplateArgumentList(const TemplateArgumentListInfo &, 2435 const PrintingPolicy &Policy); 2436 2437 /// True if this template specialization type matches a current 2438 /// instantiation in the context in which it is found. 2439 bool isCurrentInstantiation() const { 2440 return ContextAndCurrentInstantiation.getInt(); 2441 } 2442 2443 typedef const TemplateArgument * iterator; 2444 2445 iterator begin() const { return getArgs(); } 2446 iterator end() const; 2447 2448 /// \brief Retrieve the name of the template that we are specializing. 2449 TemplateName getTemplateName() const { return Template; } 2450 2451 /// \brief Retrieve the template arguments. 2452 const TemplateArgument *getArgs() const { 2453 return reinterpret_cast<const TemplateArgument *>(this + 1); 2454 } 2455 2456 /// \brief Retrieve the number of template arguments. 2457 unsigned getNumArgs() const { return NumArgs; } 2458 2459 /// \brief Retrieve a specific template argument as a type. 2460 /// \precondition @c isArgType(Arg) 2461 const TemplateArgument &getArg(unsigned Idx) const; 2462 2463 bool isSugared() const { 2464 return !isDependentType() || isCurrentInstantiation(); 2465 } 2466 QualType desugar() const { return getCanonicalTypeInternal(); } 2467 2468 void Profile(llvm::FoldingSetNodeID &ID) { 2469 Profile(ID, Template, isCurrentInstantiation(), getArgs(), NumArgs, 2470 *ContextAndCurrentInstantiation.getPointer()); 2471 } 2472 2473 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 2474 bool IsCurrentInstantiation, 2475 const TemplateArgument *Args, 2476 unsigned NumArgs, 2477 ASTContext &Context); 2478 2479 static bool classof(const Type *T) { 2480 return T->getTypeClass() == TemplateSpecialization; 2481 } 2482 static bool classof(const TemplateSpecializationType *T) { return true; } 2483}; 2484 2485/// \brief The injected class name of a C++ class template or class 2486/// template partial specialization. Used to record that a type was 2487/// spelled with a bare identifier rather than as a template-id; the 2488/// equivalent for non-templated classes is just RecordType. 2489/// 2490/// Injected class name types are always dependent. Template 2491/// instantiation turns these into RecordTypes. 2492/// 2493/// Injected class name types are always canonical. This works 2494/// because it is impossible to compare an injected class name type 2495/// with the corresponding non-injected template type, for the same 2496/// reason that it is impossible to directly compare template 2497/// parameters from different dependent contexts: injected class name 2498/// types can only occur within the scope of a particular templated 2499/// declaration, and within that scope every template specialization 2500/// will canonicalize to the injected class name (when appropriate 2501/// according to the rules of the language). 2502class InjectedClassNameType : public Type { 2503 CXXRecordDecl *Decl; 2504 2505 /// The template specialization which this type represents. 2506 /// For example, in 2507 /// template <class T> class A { ... }; 2508 /// this is A<T>, whereas in 2509 /// template <class X, class Y> class A<B<X,Y> > { ... }; 2510 /// this is A<B<X,Y> >. 2511 /// 2512 /// It is always unqualified, always a template specialization type, 2513 /// and always dependent. 2514 QualType InjectedType; 2515 2516 friend class ASTContext; // ASTContext creates these. 2517 friend class TagDecl; // TagDecl mutilates the Decl 2518 InjectedClassNameType(CXXRecordDecl *D, QualType TST) 2519 : Type(InjectedClassName, QualType(), true), 2520 Decl(D), InjectedType(TST) { 2521 assert(isa<TemplateSpecializationType>(TST)); 2522 assert(!TST.hasQualifiers()); 2523 assert(TST->isDependentType()); 2524 } 2525 2526public: 2527 QualType getInjectedSpecializationType() const { return InjectedType; } 2528 const TemplateSpecializationType *getInjectedTST() const { 2529 return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); 2530 } 2531 2532 CXXRecordDecl *getDecl() const { return Decl; } 2533 2534 bool isSugared() const { return false; } 2535 QualType desugar() const { return QualType(this, 0); } 2536 2537 static bool classof(const Type *T) { 2538 return T->getTypeClass() == InjectedClassName; 2539 } 2540 static bool classof(const InjectedClassNameType *T) { return true; } 2541}; 2542 2543/// \brief The kind of a tag type. 2544enum TagTypeKind { 2545 /// \brief The "struct" keyword. 2546 TTK_Struct, 2547 /// \brief The "union" keyword. 2548 TTK_Union, 2549 /// \brief The "class" keyword. 2550 TTK_Class, 2551 /// \brief The "enum" keyword. 2552 TTK_Enum 2553}; 2554 2555/// \brief The elaboration keyword that precedes a qualified type name or 2556/// introduces an elaborated-type-specifier. 2557enum ElaboratedTypeKeyword { 2558 /// \brief The "struct" keyword introduces the elaborated-type-specifier. 2559 ETK_Struct, 2560 /// \brief The "union" keyword introduces the elaborated-type-specifier. 2561 ETK_Union, 2562 /// \brief The "class" keyword introduces the elaborated-type-specifier. 2563 ETK_Class, 2564 /// \brief The "enum" keyword introduces the elaborated-type-specifier. 2565 ETK_Enum, 2566 /// \brief The "typename" keyword precedes the qualified type name, e.g., 2567 /// \c typename T::type. 2568 ETK_Typename, 2569 /// \brief No keyword precedes the qualified type name. 2570 ETK_None 2571}; 2572 2573/// A helper class for Type nodes having an ElaboratedTypeKeyword. 2574/// The keyword in stored in the free bits of the base class. 2575/// Also provides a few static helpers for converting and printing 2576/// elaborated type keyword and tag type kind enumerations. 2577class TypeWithKeyword : public Type { 2578 /// Keyword - Encodes an ElaboratedTypeKeyword enumeration constant. 2579 unsigned Keyword : 3; 2580 2581protected: 2582 TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, 2583 QualType Canonical, bool dependent) 2584 : Type(tc, Canonical, dependent), Keyword(Keyword) {} 2585 2586public: 2587 virtual ~TypeWithKeyword(); // pin vtable to Type.cpp 2588 2589 ElaboratedTypeKeyword getKeyword() const { 2590 return static_cast<ElaboratedTypeKeyword>(Keyword); 2591 } 2592 2593 /// getKeywordForTypeSpec - Converts a type specifier (DeclSpec::TST) 2594 /// into an elaborated type keyword. 2595 static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); 2596 2597 /// getTagTypeKindForTypeSpec - Converts a type specifier (DeclSpec::TST) 2598 /// into a tag type kind. It is an error to provide a type specifier 2599 /// which *isn't* a tag kind here. 2600 static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); 2601 2602 /// getKeywordForTagDeclKind - Converts a TagTypeKind into an 2603 /// elaborated type keyword. 2604 static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); 2605 2606 /// getTagTypeKindForKeyword - Converts an elaborated type keyword into 2607 // a TagTypeKind. It is an error to provide an elaborated type keyword 2608 /// which *isn't* a tag kind here. 2609 static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); 2610 2611 static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); 2612 2613 static const char *getKeywordName(ElaboratedTypeKeyword Keyword); 2614 2615 static const char *getTagTypeKindName(TagTypeKind Kind) { 2616 return getKeywordName(getKeywordForTagTypeKind(Kind)); 2617 } 2618 2619 class CannotCastToThisType {}; 2620 static CannotCastToThisType classof(const Type *); 2621}; 2622 2623/// \brief Represents a type that was referred to using an elaborated type 2624/// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, 2625/// or both. 2626/// 2627/// This type is used to keep track of a type name as written in the 2628/// source code, including tag keywords and any nested-name-specifiers. 2629/// The type itself is always "sugar", used to express what was written 2630/// in the source code but containing no additional semantic information. 2631class ElaboratedType : public TypeWithKeyword, public llvm::FoldingSetNode { 2632 2633 /// \brief The nested name specifier containing the qualifier. 2634 NestedNameSpecifier *NNS; 2635 2636 /// \brief The type that this qualified name refers to. 2637 QualType NamedType; 2638 2639 ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 2640 QualType NamedType, QualType CanonType) 2641 : TypeWithKeyword(Keyword, Elaborated, CanonType, 2642 NamedType->isDependentType()), 2643 NNS(NNS), NamedType(NamedType) { 2644 assert(!(Keyword == ETK_None && NNS == 0) && 2645 "ElaboratedType cannot have elaborated type keyword " 2646 "and name qualifier both null."); 2647 } 2648 2649 friend class ASTContext; // ASTContext creates these 2650 2651public: 2652 2653 /// \brief Retrieve the qualification on this type. 2654 NestedNameSpecifier *getQualifier() const { return NNS; } 2655 2656 /// \brief Retrieve the type named by the qualified-id. 2657 QualType getNamedType() const { return NamedType; } 2658 2659 /// \brief Remove a single level of sugar. 2660 QualType desugar() const { return getNamedType(); } 2661 2662 /// \brief Returns whether this type directly provides sugar. 2663 bool isSugared() const { return true; } 2664 2665 void Profile(llvm::FoldingSetNodeID &ID) { 2666 Profile(ID, getKeyword(), NNS, NamedType); 2667 } 2668 2669 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 2670 NestedNameSpecifier *NNS, QualType NamedType) { 2671 ID.AddInteger(Keyword); 2672 ID.AddPointer(NNS); 2673 NamedType.Profile(ID); 2674 } 2675 2676 static bool classof(const Type *T) { 2677 return T->getTypeClass() == Elaborated; 2678 } 2679 static bool classof(const ElaboratedType *T) { return true; } 2680}; 2681 2682/// \brief Represents a qualified type name for which the type name is 2683/// dependent. 2684/// 2685/// DependentNameType represents a class of dependent types that involve a 2686/// dependent nested-name-specifier (e.g., "T::") followed by a (dependent) 2687/// name of a type. The DependentNameType may start with a "typename" (for a 2688/// typename-specifier), "class", "struct", "union", or "enum" (for a 2689/// dependent elaborated-type-specifier), or nothing (in contexts where we 2690/// know that we must be referring to a type, e.g., in a base class specifier). 2691class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { 2692 2693 /// \brief The nested name specifier containing the qualifier. 2694 NestedNameSpecifier *NNS; 2695 2696 typedef llvm::PointerUnion<const IdentifierInfo *, 2697 const TemplateSpecializationType *> NameType; 2698 2699 /// \brief The type that this typename specifier refers to. 2700 NameType Name; 2701 2702 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 2703 const IdentifierInfo *Name, QualType CanonType) 2704 : TypeWithKeyword(Keyword, DependentName, CanonType, true), 2705 NNS(NNS), Name(Name) { 2706 assert(NNS->isDependent() && 2707 "DependentNameType requires a dependent nested-name-specifier"); 2708 } 2709 2710 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 2711 const TemplateSpecializationType *Ty, QualType CanonType) 2712 : TypeWithKeyword(Keyword, DependentName, CanonType, true), 2713 NNS(NNS), Name(Ty) { 2714 assert(NNS->isDependent() && 2715 "DependentNameType requires a dependent nested-name-specifier"); 2716 } 2717 2718 friend class ASTContext; // ASTContext creates these 2719 2720public: 2721 2722 /// \brief Retrieve the qualification on this type. 2723 NestedNameSpecifier *getQualifier() const { return NNS; } 2724 2725 /// \brief Retrieve the type named by the typename specifier as an 2726 /// identifier. 2727 /// 2728 /// This routine will return a non-NULL identifier pointer when the 2729 /// form of the original typename was terminated by an identifier, 2730 /// e.g., "typename T::type". 2731 const IdentifierInfo *getIdentifier() const { 2732 return Name.dyn_cast<const IdentifierInfo *>(); 2733 } 2734 2735 /// \brief Retrieve the type named by the typename specifier as a 2736 /// type specialization. 2737 const TemplateSpecializationType *getTemplateId() const { 2738 return Name.dyn_cast<const TemplateSpecializationType *>(); 2739 } 2740 2741 bool isSugared() const { return false; } 2742 QualType desugar() const { return QualType(this, 0); } 2743 2744 void Profile(llvm::FoldingSetNodeID &ID) { 2745 Profile(ID, getKeyword(), NNS, Name); 2746 } 2747 2748 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 2749 NestedNameSpecifier *NNS, NameType Name) { 2750 ID.AddInteger(Keyword); 2751 ID.AddPointer(NNS); 2752 ID.AddPointer(Name.getOpaqueValue()); 2753 } 2754 2755 static bool classof(const Type *T) { 2756 return T->getTypeClass() == DependentName; 2757 } 2758 static bool classof(const DependentNameType *T) { return true; } 2759}; 2760 2761/// ObjCObjectType - Represents a class type in Objective C. 2762/// Every Objective C type is a combination of a base type and a 2763/// list of protocols. 2764/// 2765/// Given the following declarations: 2766/// @class C; 2767/// @protocol P; 2768/// 2769/// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType 2770/// with base C and no protocols. 2771/// 2772/// 'C<P>' is an ObjCObjectType with base C and protocol list [P]. 2773/// 2774/// 'id' is a TypedefType which is sugar for an ObjCPointerType whose 2775/// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType 2776/// and no protocols. 2777/// 2778/// 'id<P>' is an ObjCPointerType whose pointee is an ObjCObjecType 2779/// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually 2780/// this should get its own sugar class to better represent the source. 2781class ObjCObjectType : public Type { 2782 // Pad the bit count up so that NumProtocols is 2-byte aligned 2783 unsigned : BitsRemainingInType - 16; 2784 2785 /// \brief The number of protocols stored after the 2786 /// ObjCObjectPointerType node. 2787 /// 2788 /// These protocols are those written directly on the type. If 2789 /// protocol qualifiers ever become additive, the iterators will 2790 /// get kindof complicated. 2791 /// 2792 /// In the canonical object type, these are sorted alphabetically 2793 /// and uniqued. 2794 unsigned NumProtocols : 16; 2795 2796 /// Either a BuiltinType or an InterfaceType or sugar for either. 2797 QualType BaseType; 2798 2799 ObjCProtocolDecl * const *getProtocolStorage() const { 2800 return const_cast<ObjCObjectType*>(this)->getProtocolStorage(); 2801 } 2802 2803 ObjCProtocolDecl **getProtocolStorage(); 2804 2805protected: 2806 ObjCObjectType(QualType Canonical, QualType Base, 2807 ObjCProtocolDecl * const *Protocols, unsigned NumProtocols); 2808 2809 enum Nonce_ObjCInterface { Nonce_ObjCInterface }; 2810 ObjCObjectType(enum Nonce_ObjCInterface) 2811 : Type(ObjCInterface, QualType(), false), 2812 NumProtocols(0), 2813 BaseType(QualType(this_(), 0)) {} 2814 2815public: 2816 /// getBaseType - Gets the base type of this object type. This is 2817 /// always (possibly sugar for) one of: 2818 /// - the 'id' builtin type (as opposed to the 'id' type visible to the 2819 /// user, which is a typedef for an ObjCPointerType) 2820 /// - the 'Class' builtin type (same caveat) 2821 /// - an ObjCObjectType (currently always an ObjCInterfaceType) 2822 QualType getBaseType() const { return BaseType; } 2823 2824 bool isObjCId() const { 2825 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); 2826 } 2827 bool isObjCClass() const { 2828 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); 2829 } 2830 bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } 2831 bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } 2832 bool isObjCUnqualifiedIdOrClass() const { 2833 if (!qual_empty()) return false; 2834 if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) 2835 return T->getKind() == BuiltinType::ObjCId || 2836 T->getKind() == BuiltinType::ObjCClass; 2837 return false; 2838 } 2839 bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } 2840 bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } 2841 2842 /// Gets the interface declaration for this object type, if the base type 2843 /// really is an interface. 2844 ObjCInterfaceDecl *getInterface() const; 2845 2846 typedef ObjCProtocolDecl * const *qual_iterator; 2847 2848 qual_iterator qual_begin() const { return getProtocolStorage(); } 2849 qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } 2850 2851 bool qual_empty() const { return getNumProtocols() == 0; } 2852 2853 /// getNumProtocols - Return the number of qualifying protocols in this 2854 /// interface type, or 0 if there are none. 2855 unsigned getNumProtocols() const { return NumProtocols; } 2856 2857 /// \brief Fetch a protocol by index. 2858 ObjCProtocolDecl *getProtocol(unsigned I) const { 2859 assert(I < getNumProtocols() && "Out-of-range protocol access"); 2860 return qual_begin()[I]; 2861 } 2862 2863 bool isSugared() const { return false; } 2864 QualType desugar() const { return QualType(this, 0); } 2865 2866 Linkage getLinkage() const; // key function 2867 2868 static bool classof(const Type *T) { 2869 return T->getTypeClass() == ObjCObject || 2870 T->getTypeClass() == ObjCInterface; 2871 } 2872 static bool classof(const ObjCObjectType *) { return true; } 2873}; 2874 2875/// ObjCObjectTypeImpl - A class providing a concrete implementation 2876/// of ObjCObjectType, so as to not increase the footprint of 2877/// ObjCInterfaceType. Code outside of ASTContext and the core type 2878/// system should not reference this type. 2879class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { 2880 friend class ASTContext; 2881 2882 // If anyone adds fields here, ObjCObjectType::getProtocolStorage() 2883 // will need to be modified. 2884 2885 ObjCObjectTypeImpl(QualType Canonical, QualType Base, 2886 ObjCProtocolDecl * const *Protocols, 2887 unsigned NumProtocols) 2888 : ObjCObjectType(Canonical, Base, Protocols, NumProtocols) {} 2889 2890public: 2891 void Destroy(ASTContext& C); // key function 2892 2893 void Profile(llvm::FoldingSetNodeID &ID); 2894 static void Profile(llvm::FoldingSetNodeID &ID, 2895 QualType Base, 2896 ObjCProtocolDecl *const *protocols, 2897 unsigned NumProtocols); 2898}; 2899 2900inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorage() { 2901 return reinterpret_cast<ObjCProtocolDecl**>( 2902 static_cast<ObjCObjectTypeImpl*>(this) + 1); 2903} 2904 2905/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 2906/// object oriented design. They basically correspond to C++ classes. There 2907/// are two kinds of interface types, normal interfaces like "NSString" and 2908/// qualified interfaces, which are qualified with a protocol list like 2909/// "NSString<NSCopyable, NSAmazing>". 2910/// 2911/// ObjCInterfaceType guarantees the following properties when considered 2912/// as a subtype of its superclass, ObjCObjectType: 2913/// - There are no protocol qualifiers. To reinforce this, code which 2914/// tries to invoke the protocol methods via an ObjCInterfaceType will 2915/// fail to compile. 2916/// - It is its own base type. That is, if T is an ObjCInterfaceType*, 2917/// T->getBaseType() == QualType(T, 0). 2918class ObjCInterfaceType : public ObjCObjectType { 2919 ObjCInterfaceDecl *Decl; 2920 2921 ObjCInterfaceType(const ObjCInterfaceDecl *D) 2922 : ObjCObjectType(Nonce_ObjCInterface), 2923 Decl(const_cast<ObjCInterfaceDecl*>(D)) {} 2924 friend class ASTContext; // ASTContext creates these. 2925public: 2926 void Destroy(ASTContext& C); // key function 2927 2928 /// getDecl - Get the declaration of this interface. 2929 ObjCInterfaceDecl *getDecl() const { return Decl; } 2930 2931 bool isSugared() const { return false; } 2932 QualType desugar() const { return QualType(this, 0); } 2933 2934 static bool classof(const Type *T) { 2935 return T->getTypeClass() == ObjCInterface; 2936 } 2937 static bool classof(const ObjCInterfaceType *) { return true; } 2938 2939 // Nonsense to "hide" certain members of ObjCObjectType within this 2940 // class. People asking for protocols on an ObjCInterfaceType are 2941 // not going to get what they want: ObjCInterfaceTypes are 2942 // guaranteed to have no protocols. 2943 enum { 2944 qual_iterator, 2945 qual_begin, 2946 qual_end, 2947 getNumProtocols, 2948 getProtocol 2949 }; 2950}; 2951 2952inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { 2953 if (const ObjCInterfaceType *T = 2954 getBaseType()->getAs<ObjCInterfaceType>()) 2955 return T->getDecl(); 2956 return 0; 2957} 2958 2959/// ObjCObjectPointerType - Used to represent a pointer to an 2960/// Objective C object. These are constructed from pointer 2961/// declarators when the pointee type is an ObjCObjectType (or sugar 2962/// for one). In addition, the 'id' and 'Class' types are typedefs 2963/// for these, and the protocol-qualified types 'id<P>' and 'Class<P>' 2964/// are translated into these. 2965/// 2966/// Pointers to pointers to Objective C objects are still PointerTypes; 2967/// only the first level of pointer gets it own type implementation. 2968class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 2969 QualType PointeeType; 2970 2971 ObjCObjectPointerType(QualType Canonical, QualType Pointee) 2972 : Type(ObjCObjectPointer, Canonical, false), 2973 PointeeType(Pointee) {} 2974 friend class ASTContext; // ASTContext creates these. 2975 2976public: 2977 void Destroy(ASTContext& C); 2978 2979 /// getPointeeType - Gets the type pointed to by this ObjC pointer. 2980 /// The result will always be an ObjCObjectType or sugar thereof. 2981 QualType getPointeeType() const { return PointeeType; } 2982 2983 /// getObjCObjectType - Gets the type pointed to by this ObjC 2984 /// pointer. This method always returns non-null. 2985 /// 2986 /// This method is equivalent to getPointeeType() except that 2987 /// it discards any typedefs (or other sugar) between this 2988 /// type and the "outermost" object type. So for: 2989 /// @class A; @protocol P; @protocol Q; 2990 /// typedef A<P> AP; 2991 /// typedef A A1; 2992 /// typedef A1<P> A1P; 2993 /// typedef A1P<Q> A1PQ; 2994 /// For 'A*', getObjectType() will return 'A'. 2995 /// For 'A<P>*', getObjectType() will return 'A<P>'. 2996 /// For 'AP*', getObjectType() will return 'A<P>'. 2997 /// For 'A1*', getObjectType() will return 'A'. 2998 /// For 'A1<P>*', getObjectType() will return 'A1<P>'. 2999 /// For 'A1P*', getObjectType() will return 'A1<P>'. 3000 /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because 3001 /// adding protocols to a protocol-qualified base discards the 3002 /// old qualifiers (for now). But if it didn't, getObjectType() 3003 /// would return 'A1P<Q>' (and we'd have to make iterating over 3004 /// qualifiers more complicated). 3005 const ObjCObjectType *getObjectType() const { 3006 return PointeeType->getAs<ObjCObjectType>(); 3007 } 3008 3009 /// getInterfaceType - If this pointer points to an Objective C 3010 /// @interface type, gets the type for that interface. Any protocol 3011 /// qualifiers on the interface are ignored. 3012 /// 3013 /// \return null if the base type for this pointer is 'id' or 'Class' 3014 const ObjCInterfaceType *getInterfaceType() const { 3015 return getObjectType()->getBaseType()->getAs<ObjCInterfaceType>(); 3016 } 3017 3018 /// getInterfaceDecl - If this pointer points to an Objective @interface 3019 /// type, gets the declaration for that interface. 3020 /// 3021 /// \return null if the base type for this pointer is 'id' or 'Class' 3022 ObjCInterfaceDecl *getInterfaceDecl() const { 3023 return getObjectType()->getInterface(); 3024 } 3025 3026 /// isObjCIdType - True if this is equivalent to the 'id' type, i.e. if 3027 /// its object type is the primitive 'id' type with no protocols. 3028 bool isObjCIdType() const { 3029 return getObjectType()->isObjCUnqualifiedId(); 3030 } 3031 3032 /// isObjCClassType - True if this is equivalent to the 'Class' type, 3033 /// i.e. if its object tive is the primitive 'Class' type with no protocols. 3034 bool isObjCClassType() const { 3035 return getObjectType()->isObjCUnqualifiedClass(); 3036 } 3037 3038 /// isObjCQualifiedIdType - True if this is equivalent to 'id<P>' for some 3039 /// non-empty set of protocols. 3040 bool isObjCQualifiedIdType() const { 3041 return getObjectType()->isObjCQualifiedId(); 3042 } 3043 3044 /// isObjCQualifiedClassType - True if this is equivalent to 'Class<P>' for 3045 /// some non-empty set of protocols. 3046 bool isObjCQualifiedClassType() const { 3047 return getObjectType()->isObjCQualifiedClass(); 3048 } 3049 3050 /// An iterator over the qualifiers on the object type. Provided 3051 /// for convenience. This will always iterate over the full set of 3052 /// protocols on a type, not just those provided directly. 3053 typedef ObjCObjectType::qual_iterator qual_iterator; 3054 3055 qual_iterator qual_begin() const { 3056 return getObjectType()->qual_begin(); 3057 } 3058 qual_iterator qual_end() const { 3059 return getObjectType()->qual_end(); 3060 } 3061 bool qual_empty() const { return getObjectType()->qual_empty(); } 3062 3063 /// getNumProtocols - Return the number of qualifying protocols on 3064 /// the object type. 3065 unsigned getNumProtocols() const { 3066 return getObjectType()->getNumProtocols(); 3067 } 3068 3069 /// \brief Retrieve a qualifying protocol by index on the object 3070 /// type. 3071 ObjCProtocolDecl *getProtocol(unsigned I) const { 3072 return getObjectType()->getProtocol(I); 3073 } 3074 3075 bool isSugared() const { return false; } 3076 QualType desugar() const { return QualType(this, 0); } 3077 3078 virtual Linkage getLinkage() const; 3079 3080 void Profile(llvm::FoldingSetNodeID &ID) { 3081 Profile(ID, getPointeeType()); 3082 } 3083 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 3084 ID.AddPointer(T.getAsOpaquePtr()); 3085 } 3086 static bool classof(const Type *T) { 3087 return T->getTypeClass() == ObjCObjectPointer; 3088 } 3089 static bool classof(const ObjCObjectPointerType *) { return true; } 3090}; 3091 3092/// A qualifier set is used to build a set of qualifiers. 3093class QualifierCollector : public Qualifiers { 3094 ASTContext *Context; 3095 3096public: 3097 QualifierCollector(Qualifiers Qs = Qualifiers()) 3098 : Qualifiers(Qs), Context(0) {} 3099 QualifierCollector(ASTContext &Context, Qualifiers Qs = Qualifiers()) 3100 : Qualifiers(Qs), Context(&Context) {} 3101 3102 void setContext(ASTContext &C) { Context = &C; } 3103 3104 /// Collect any qualifiers on the given type and return an 3105 /// unqualified type. 3106 const Type *strip(QualType QT) { 3107 addFastQualifiers(QT.getLocalFastQualifiers()); 3108 if (QT.hasLocalNonFastQualifiers()) { 3109 const ExtQuals *EQ = QT.getExtQualsUnsafe(); 3110 Context = &EQ->getContext(); 3111 addQualifiers(EQ->getQualifiers()); 3112 return EQ->getBaseType(); 3113 } 3114 return QT.getTypePtrUnsafe(); 3115 } 3116 3117 /// Apply the collected qualifiers to the given type. 3118 QualType apply(QualType QT) const; 3119 3120 /// Apply the collected qualifiers to the given type. 3121 QualType apply(const Type* T) const; 3122 3123}; 3124 3125 3126// Inline function definitions. 3127 3128inline bool QualType::isCanonical() const { 3129 const Type *T = getTypePtr(); 3130 if (hasLocalQualifiers()) 3131 return T->isCanonicalUnqualified() && !isa<ArrayType>(T); 3132 return T->isCanonicalUnqualified(); 3133} 3134 3135inline bool QualType::isCanonicalAsParam() const { 3136 if (hasLocalQualifiers()) return false; 3137 const Type *T = getTypePtr(); 3138 return T->isCanonicalUnqualified() && 3139 !isa<FunctionType>(T) && !isa<ArrayType>(T); 3140} 3141 3142inline bool QualType::isConstQualified() const { 3143 return isLocalConstQualified() || 3144 getTypePtr()->getCanonicalTypeInternal().isLocalConstQualified(); 3145} 3146 3147inline bool QualType::isRestrictQualified() const { 3148 return isLocalRestrictQualified() || 3149 getTypePtr()->getCanonicalTypeInternal().isLocalRestrictQualified(); 3150} 3151 3152 3153inline bool QualType::isVolatileQualified() const { 3154 return isLocalVolatileQualified() || 3155 getTypePtr()->getCanonicalTypeInternal().isLocalVolatileQualified(); 3156} 3157 3158inline bool QualType::hasQualifiers() const { 3159 return hasLocalQualifiers() || 3160 getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers(); 3161} 3162 3163inline Qualifiers QualType::getQualifiers() const { 3164 Qualifiers Quals = getLocalQualifiers(); 3165 Quals.addQualifiers( 3166 getTypePtr()->getCanonicalTypeInternal().getLocalQualifiers()); 3167 return Quals; 3168} 3169 3170inline unsigned QualType::getCVRQualifiers() const { 3171 return getLocalCVRQualifiers() | 3172 getTypePtr()->getCanonicalTypeInternal().getLocalCVRQualifiers(); 3173} 3174 3175/// getCVRQualifiersThroughArrayTypes - If there are CVR qualifiers for this 3176/// type, returns them. Otherwise, if this is an array type, recurses 3177/// on the element type until some qualifiers have been found or a non-array 3178/// type reached. 3179inline unsigned QualType::getCVRQualifiersThroughArrayTypes() const { 3180 if (unsigned Quals = getCVRQualifiers()) 3181 return Quals; 3182 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3183 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3184 return AT->getElementType().getCVRQualifiersThroughArrayTypes(); 3185 return 0; 3186} 3187 3188inline void QualType::removeConst() { 3189 removeFastQualifiers(Qualifiers::Const); 3190} 3191 3192inline void QualType::removeRestrict() { 3193 removeFastQualifiers(Qualifiers::Restrict); 3194} 3195 3196inline void QualType::removeVolatile() { 3197 QualifierCollector Qc; 3198 const Type *Ty = Qc.strip(*this); 3199 if (Qc.hasVolatile()) { 3200 Qc.removeVolatile(); 3201 *this = Qc.apply(Ty); 3202 } 3203} 3204 3205inline void QualType::removeCVRQualifiers(unsigned Mask) { 3206 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 3207 3208 // Fast path: we don't need to touch the slow qualifiers. 3209 if (!(Mask & ~Qualifiers::FastMask)) { 3210 removeFastQualifiers(Mask); 3211 return; 3212 } 3213 3214 QualifierCollector Qc; 3215 const Type *Ty = Qc.strip(*this); 3216 Qc.removeCVRQualifiers(Mask); 3217 *this = Qc.apply(Ty); 3218} 3219 3220/// getAddressSpace - Return the address space of this type. 3221inline unsigned QualType::getAddressSpace() const { 3222 if (hasLocalNonFastQualifiers()) { 3223 const ExtQuals *EQ = getExtQualsUnsafe(); 3224 if (EQ->hasAddressSpace()) 3225 return EQ->getAddressSpace(); 3226 } 3227 3228 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3229 if (CT.hasLocalNonFastQualifiers()) { 3230 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 3231 if (EQ->hasAddressSpace()) 3232 return EQ->getAddressSpace(); 3233 } 3234 3235 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3236 return AT->getElementType().getAddressSpace(); 3237 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 3238 return RT->getAddressSpace(); 3239 return 0; 3240} 3241 3242/// getObjCGCAttr - Return the gc attribute of this type. 3243inline Qualifiers::GC QualType::getObjCGCAttr() const { 3244 if (hasLocalNonFastQualifiers()) { 3245 const ExtQuals *EQ = getExtQualsUnsafe(); 3246 if (EQ->hasObjCGCAttr()) 3247 return EQ->getObjCGCAttr(); 3248 } 3249 3250 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3251 if (CT.hasLocalNonFastQualifiers()) { 3252 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 3253 if (EQ->hasObjCGCAttr()) 3254 return EQ->getObjCGCAttr(); 3255 } 3256 3257 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3258 return AT->getElementType().getObjCGCAttr(); 3259 if (const ObjCObjectPointerType *PT = CT->getAs<ObjCObjectPointerType>()) 3260 return PT->getPointeeType().getObjCGCAttr(); 3261 // We most look at all pointer types, not just pointer to interface types. 3262 if (const PointerType *PT = CT->getAs<PointerType>()) 3263 return PT->getPointeeType().getObjCGCAttr(); 3264 return Qualifiers::GCNone; 3265} 3266 3267inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { 3268 if (const PointerType *PT = t.getAs<PointerType>()) { 3269 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 3270 return FT->getExtInfo(); 3271 } else if (const FunctionType *FT = t.getAs<FunctionType>()) 3272 return FT->getExtInfo(); 3273 3274 return FunctionType::ExtInfo(); 3275} 3276 3277inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { 3278 return getFunctionExtInfo(*t); 3279} 3280 3281/// isMoreQualifiedThan - Determine whether this type is more 3282/// qualified than the Other type. For example, "const volatile int" 3283/// is more qualified than "const int", "volatile int", and 3284/// "int". However, it is not more qualified than "const volatile 3285/// int". 3286inline bool QualType::isMoreQualifiedThan(QualType Other) const { 3287 // FIXME: work on arbitrary qualifiers 3288 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 3289 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 3290 if (getAddressSpace() != Other.getAddressSpace()) 3291 return false; 3292 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 3293} 3294 3295/// isAtLeastAsQualifiedAs - Determine whether this type is at last 3296/// as qualified as the Other type. For example, "const volatile 3297/// int" is at least as qualified as "const int", "volatile int", 3298/// "int", and "const volatile int". 3299inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 3300 // FIXME: work on arbitrary qualifiers 3301 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 3302 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 3303 if (getAddressSpace() != Other.getAddressSpace()) 3304 return false; 3305 return (MyQuals | OtherQuals) == MyQuals; 3306} 3307 3308/// getNonReferenceType - If Type is a reference type (e.g., const 3309/// int&), returns the type that the reference refers to ("const 3310/// int"). Otherwise, returns the type itself. This routine is used 3311/// throughout Sema to implement C++ 5p6: 3312/// 3313/// If an expression initially has the type "reference to T" (8.3.2, 3314/// 8.5.3), the type is adjusted to "T" prior to any further 3315/// analysis, the expression designates the object or function 3316/// denoted by the reference, and the expression is an lvalue. 3317inline QualType QualType::getNonReferenceType() const { 3318 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 3319 return RefType->getPointeeType(); 3320 else 3321 return *this; 3322} 3323 3324inline bool Type::isFunctionType() const { 3325 return isa<FunctionType>(CanonicalType); 3326} 3327inline bool Type::isPointerType() const { 3328 return isa<PointerType>(CanonicalType); 3329} 3330inline bool Type::isAnyPointerType() const { 3331 return isPointerType() || isObjCObjectPointerType(); 3332} 3333inline bool Type::isBlockPointerType() const { 3334 return isa<BlockPointerType>(CanonicalType); 3335} 3336inline bool Type::isReferenceType() const { 3337 return isa<ReferenceType>(CanonicalType); 3338} 3339inline bool Type::isLValueReferenceType() const { 3340 return isa<LValueReferenceType>(CanonicalType); 3341} 3342inline bool Type::isRValueReferenceType() const { 3343 return isa<RValueReferenceType>(CanonicalType); 3344} 3345inline bool Type::isFunctionPointerType() const { 3346 if (const PointerType* T = getAs<PointerType>()) 3347 return T->getPointeeType()->isFunctionType(); 3348 else 3349 return false; 3350} 3351inline bool Type::isMemberPointerType() const { 3352 return isa<MemberPointerType>(CanonicalType); 3353} 3354inline bool Type::isMemberFunctionPointerType() const { 3355 if (const MemberPointerType* T = getAs<MemberPointerType>()) 3356 return T->getPointeeType()->isFunctionType(); 3357 else 3358 return false; 3359} 3360inline bool Type::isArrayType() const { 3361 return isa<ArrayType>(CanonicalType); 3362} 3363inline bool Type::isConstantArrayType() const { 3364 return isa<ConstantArrayType>(CanonicalType); 3365} 3366inline bool Type::isIncompleteArrayType() const { 3367 return isa<IncompleteArrayType>(CanonicalType); 3368} 3369inline bool Type::isVariableArrayType() const { 3370 return isa<VariableArrayType>(CanonicalType); 3371} 3372inline bool Type::isDependentSizedArrayType() const { 3373 return isa<DependentSizedArrayType>(CanonicalType); 3374} 3375inline bool Type::isRecordType() const { 3376 return isa<RecordType>(CanonicalType); 3377} 3378inline bool Type::isAnyComplexType() const { 3379 return isa<ComplexType>(CanonicalType); 3380} 3381inline bool Type::isVectorType() const { 3382 return isa<VectorType>(CanonicalType); 3383} 3384inline bool Type::isExtVectorType() const { 3385 return isa<ExtVectorType>(CanonicalType); 3386} 3387inline bool Type::isObjCObjectPointerType() const { 3388 return isa<ObjCObjectPointerType>(CanonicalType); 3389} 3390inline bool Type::isObjCObjectType() const { 3391 return isa<ObjCObjectType>(CanonicalType); 3392} 3393inline bool Type::isObjCQualifiedIdType() const { 3394 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3395 return OPT->isObjCQualifiedIdType(); 3396 return false; 3397} 3398inline bool Type::isObjCQualifiedClassType() const { 3399 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3400 return OPT->isObjCQualifiedClassType(); 3401 return false; 3402} 3403inline bool Type::isObjCIdType() const { 3404 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3405 return OPT->isObjCIdType(); 3406 return false; 3407} 3408inline bool Type::isObjCClassType() const { 3409 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3410 return OPT->isObjCClassType(); 3411 return false; 3412} 3413inline bool Type::isObjCSelType() const { 3414 if (const PointerType *OPT = getAs<PointerType>()) 3415 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 3416 return false; 3417} 3418inline bool Type::isObjCBuiltinType() const { 3419 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 3420} 3421inline bool Type::isTemplateTypeParmType() const { 3422 return isa<TemplateTypeParmType>(CanonicalType); 3423} 3424 3425inline bool Type::isSpecificBuiltinType(unsigned K) const { 3426 if (const BuiltinType *BT = getAs<BuiltinType>()) 3427 if (BT->getKind() == (BuiltinType::Kind) K) 3428 return true; 3429 return false; 3430} 3431 3432/// \brief Determines whether this is a type for which one can define 3433/// an overloaded operator. 3434inline bool Type::isOverloadableType() const { 3435 return isDependentType() || isRecordType() || isEnumeralType(); 3436} 3437 3438inline bool Type::hasPointerRepresentation() const { 3439 return (isPointerType() || isReferenceType() || isBlockPointerType() || 3440 isObjCObjectPointerType() || isNullPtrType()); 3441} 3442 3443inline bool Type::hasObjCPointerRepresentation() const { 3444 return isObjCObjectPointerType(); 3445} 3446 3447/// Insertion operator for diagnostics. This allows sending QualType's into a 3448/// diagnostic with <<. 3449inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 3450 QualType T) { 3451 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 3452 Diagnostic::ak_qualtype); 3453 return DB; 3454} 3455 3456/// Insertion operator for partial diagnostics. This allows sending QualType's 3457/// into a diagnostic with <<. 3458inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, 3459 QualType T) { 3460 PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 3461 Diagnostic::ak_qualtype); 3462 return PD; 3463} 3464 3465// Helper class template that is used by Type::getAs to ensure that one does 3466// not try to look through a qualified type to get to an array type. 3467template<typename T, 3468 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 3469 llvm::is_base_of<ArrayType, T>::value)> 3470struct ArrayType_cannot_be_used_with_getAs { }; 3471 3472template<typename T> 3473struct ArrayType_cannot_be_used_with_getAs<T, true>; 3474 3475/// Member-template getAs<specific type>'. 3476template <typename T> const T *Type::getAs() const { 3477 ArrayType_cannot_be_used_with_getAs<T> at; 3478 (void)at; 3479 3480 // If this is directly a T type, return it. 3481 if (const T *Ty = dyn_cast<T>(this)) 3482 return Ty; 3483 3484 // If the canonical form of this type isn't the right kind, reject it. 3485 if (!isa<T>(CanonicalType)) 3486 return 0; 3487 3488 // If this is a typedef for the type, strip the typedef off without 3489 // losing all typedef information. 3490 return cast<T>(getUnqualifiedDesugaredType()); 3491} 3492 3493} // end namespace clang 3494 3495#endif 3496