Type.h revision ead608af31b6c9abeae1ca6d0b75094dac4641c0
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/AST/NestedNameSpecifier.h" 21#include "clang/AST/TemplateName.h" 22#include "llvm/Support/Casting.h" 23#include "llvm/Support/type_traits.h" 24#include "llvm/ADT/APSInt.h" 25#include "llvm/ADT/FoldingSet.h" 26#include "llvm/ADT/PointerIntPair.h" 27#include "llvm/ADT/PointerUnion.h" 28 29using llvm::isa; 30using llvm::cast; 31using llvm::cast_or_null; 32using llvm::dyn_cast; 33using llvm::dyn_cast_or_null; 34namespace clang { 35 enum { 36 TypeAlignmentInBits = 3, 37 TypeAlignment = 1 << TypeAlignmentInBits 38 }; 39 class Type; 40 class ExtQuals; 41 class QualType; 42} 43 44namespace llvm { 45 template <typename T> 46 class PointerLikeTypeTraits; 47 template<> 48 class PointerLikeTypeTraits< ::clang::Type*> { 49 public: 50 static inline void *getAsVoidPointer(::clang::Type *P) { return P; } 51 static inline ::clang::Type *getFromVoidPointer(void *P) { 52 return static_cast< ::clang::Type*>(P); 53 } 54 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 55 }; 56 template<> 57 class PointerLikeTypeTraits< ::clang::ExtQuals*> { 58 public: 59 static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; } 60 static inline ::clang::ExtQuals *getFromVoidPointer(void *P) { 61 return static_cast< ::clang::ExtQuals*>(P); 62 } 63 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 64 }; 65 66 template <> 67 struct isPodLike<clang::QualType> { static const bool value = true; }; 68} 69 70namespace clang { 71 class ASTContext; 72 class TypedefDecl; 73 class TemplateDecl; 74 class TemplateTypeParmDecl; 75 class NonTypeTemplateParmDecl; 76 class TemplateTemplateParmDecl; 77 class TagDecl; 78 class RecordDecl; 79 class CXXRecordDecl; 80 class EnumDecl; 81 class FieldDecl; 82 class ObjCInterfaceDecl; 83 class ObjCProtocolDecl; 84 class ObjCMethodDecl; 85 class UnresolvedUsingTypenameDecl; 86 class Expr; 87 class Stmt; 88 class SourceLocation; 89 class StmtIteratorBase; 90 class TemplateArgument; 91 class TemplateArgumentLoc; 92 class TemplateArgumentListInfo; 93 class Type; 94 class QualifiedNameType; 95 struct PrintingPolicy; 96 97 template <typename> class CanQual; 98 typedef CanQual<Type> CanQualType; 99 100 // Provide forward declarations for all of the *Type classes 101#define TYPE(Class, Base) class Class##Type; 102#include "clang/AST/TypeNodes.def" 103 104/// Qualifiers - The collection of all-type qualifiers we support. 105/// Clang supports five independent qualifiers: 106/// * C99: const, volatile, and restrict 107/// * Embedded C (TR18037): address spaces 108/// * Objective C: the GC attributes (none, weak, or strong) 109class Qualifiers { 110public: 111 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 112 Const = 0x1, 113 Restrict = 0x2, 114 Volatile = 0x4, 115 CVRMask = Const | Volatile | Restrict 116 }; 117 118 enum GC { 119 GCNone = 0, 120 Weak, 121 Strong 122 }; 123 124 enum { 125 /// The maximum supported address space number. 126 /// 24 bits should be enough for anyone. 127 MaxAddressSpace = 0xffffffu, 128 129 /// The width of the "fast" qualifier mask. 130 FastWidth = 2, 131 132 /// The fast qualifier mask. 133 FastMask = (1 << FastWidth) - 1 134 }; 135 136 Qualifiers() : Mask(0) {} 137 138 static Qualifiers fromFastMask(unsigned Mask) { 139 Qualifiers Qs; 140 Qs.addFastQualifiers(Mask); 141 return Qs; 142 } 143 144 static Qualifiers fromCVRMask(unsigned CVR) { 145 Qualifiers Qs; 146 Qs.addCVRQualifiers(CVR); 147 return Qs; 148 } 149 150 // Deserialize qualifiers from an opaque representation. 151 static Qualifiers fromOpaqueValue(unsigned opaque) { 152 Qualifiers Qs; 153 Qs.Mask = opaque; 154 return Qs; 155 } 156 157 // Serialize these qualifiers into an opaque representation. 158 unsigned getAsOpaqueValue() const { 159 return Mask; 160 } 161 162 bool hasConst() const { return Mask & Const; } 163 void setConst(bool flag) { 164 Mask = (Mask & ~Const) | (flag ? Const : 0); 165 } 166 void removeConst() { Mask &= ~Const; } 167 void addConst() { Mask |= Const; } 168 169 bool hasVolatile() const { return Mask & Volatile; } 170 void setVolatile(bool flag) { 171 Mask = (Mask & ~Volatile) | (flag ? Volatile : 0); 172 } 173 void removeVolatile() { Mask &= ~Volatile; } 174 void addVolatile() { Mask |= Volatile; } 175 176 bool hasRestrict() const { return Mask & Restrict; } 177 void setRestrict(bool flag) { 178 Mask = (Mask & ~Restrict) | (flag ? Restrict : 0); 179 } 180 void removeRestrict() { Mask &= ~Restrict; } 181 void addRestrict() { Mask |= Restrict; } 182 183 bool hasCVRQualifiers() const { return getCVRQualifiers(); } 184 unsigned getCVRQualifiers() const { return Mask & CVRMask; } 185 void setCVRQualifiers(unsigned mask) { 186 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 187 Mask = (Mask & ~CVRMask) | mask; 188 } 189 void removeCVRQualifiers(unsigned mask) { 190 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 191 Mask &= ~mask; 192 } 193 void removeCVRQualifiers() { 194 removeCVRQualifiers(CVRMask); 195 } 196 void addCVRQualifiers(unsigned mask) { 197 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 198 Mask |= mask; 199 } 200 201 bool hasObjCGCAttr() const { return Mask & GCAttrMask; } 202 GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); } 203 void setObjCGCAttr(GC type) { 204 Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift); 205 } 206 void removeObjCGCAttr() { setObjCGCAttr(GCNone); } 207 void addObjCGCAttr(GC type) { 208 assert(type); 209 setObjCGCAttr(type); 210 } 211 212 bool hasAddressSpace() const { return Mask & AddressSpaceMask; } 213 unsigned getAddressSpace() const { return Mask >> AddressSpaceShift; } 214 void setAddressSpace(unsigned space) { 215 assert(space <= MaxAddressSpace); 216 Mask = (Mask & ~AddressSpaceMask) 217 | (((uint32_t) space) << AddressSpaceShift); 218 } 219 void removeAddressSpace() { setAddressSpace(0); } 220 void addAddressSpace(unsigned space) { 221 assert(space); 222 setAddressSpace(space); 223 } 224 225 // Fast qualifiers are those that can be allocated directly 226 // on a QualType object. 227 bool hasFastQualifiers() const { return getFastQualifiers(); } 228 unsigned getFastQualifiers() const { return Mask & FastMask; } 229 void setFastQualifiers(unsigned mask) { 230 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 231 Mask = (Mask & ~FastMask) | mask; 232 } 233 void removeFastQualifiers(unsigned mask) { 234 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 235 Mask &= ~mask; 236 } 237 void removeFastQualifiers() { 238 removeFastQualifiers(FastMask); 239 } 240 void addFastQualifiers(unsigned mask) { 241 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 242 Mask |= mask; 243 } 244 245 /// hasNonFastQualifiers - Return true if the set contains any 246 /// qualifiers which require an ExtQuals node to be allocated. 247 bool hasNonFastQualifiers() const { return Mask & ~FastMask; } 248 Qualifiers getNonFastQualifiers() const { 249 Qualifiers Quals = *this; 250 Quals.setFastQualifiers(0); 251 return Quals; 252 } 253 254 /// hasQualifiers - Return true if the set contains any qualifiers. 255 bool hasQualifiers() const { return Mask; } 256 bool empty() const { return !Mask; } 257 258 /// \brief Add the qualifiers from the given set to this set. 259 void addQualifiers(Qualifiers Q) { 260 // If the other set doesn't have any non-boolean qualifiers, just 261 // bit-or it in. 262 if (!(Q.Mask & ~CVRMask)) 263 Mask |= Q.Mask; 264 else { 265 Mask |= (Q.Mask & CVRMask); 266 if (Q.hasAddressSpace()) 267 addAddressSpace(Q.getAddressSpace()); 268 if (Q.hasObjCGCAttr()) 269 addObjCGCAttr(Q.getObjCGCAttr()); 270 } 271 } 272 273 bool operator==(Qualifiers Other) const { return Mask == Other.Mask; } 274 bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; } 275 276 operator bool() const { return hasQualifiers(); } 277 278 Qualifiers &operator+=(Qualifiers R) { 279 addQualifiers(R); 280 return *this; 281 } 282 283 // Union two qualifier sets. If an enumerated qualifier appears 284 // in both sets, use the one from the right. 285 friend Qualifiers operator+(Qualifiers L, Qualifiers R) { 286 L += R; 287 return L; 288 } 289 290 std::string getAsString() const; 291 std::string getAsString(const PrintingPolicy &Policy) const { 292 std::string Buffer; 293 getAsStringInternal(Buffer, Policy); 294 return Buffer; 295 } 296 void getAsStringInternal(std::string &S, const PrintingPolicy &Policy) const; 297 298 void Profile(llvm::FoldingSetNodeID &ID) const { 299 ID.AddInteger(Mask); 300 } 301 302private: 303 304 // bits: |0 1 2|3 .. 4|5 .. 31| 305 // |C R V|GCAttr|AddrSpace| 306 uint32_t Mask; 307 308 static const uint32_t GCAttrMask = 0x18; 309 static const uint32_t GCAttrShift = 3; 310 static const uint32_t AddressSpaceMask = ~(CVRMask | GCAttrMask); 311 static const uint32_t AddressSpaceShift = 5; 312}; 313 314 315/// ExtQuals - We can encode up to three bits in the low bits of a 316/// type pointer, but there are many more type qualifiers that we want 317/// to be able to apply to an arbitrary type. Therefore we have this 318/// struct, intended to be heap-allocated and used by QualType to 319/// store qualifiers. 320/// 321/// The current design tags the 'const' and 'restrict' qualifiers in 322/// two low bits on the QualType pointer; a third bit records whether 323/// the pointer is an ExtQuals node. 'const' was chosen because it is 324/// orders of magnitude more common than the other two qualifiers, in 325/// both library and user code. It's relatively rare to see 326/// 'restrict' in user code, but many standard C headers are saturated 327/// with 'restrict' declarations, so that representing them efficiently 328/// is a critical goal of this representation. 329class ExtQuals : public llvm::FoldingSetNode { 330 // NOTE: changing the fast qualifiers should be straightforward as 331 // long as you don't make 'const' non-fast. 332 // 1. Qualifiers: 333 // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). 334 // Fast qualifiers must occupy the low-order bits. 335 // b) Update Qualifiers::FastWidth and FastMask. 336 // 2. QualType: 337 // a) Update is{Volatile,Restrict}Qualified(), defined inline. 338 // b) Update remove{Volatile,Restrict}, defined near the end of 339 // this header. 340 // 3. ASTContext: 341 // a) Update get{Volatile,Restrict}Type. 342 343 /// Context - the context to which this set belongs. We save this 344 /// here so that QualifierCollector can use it to reapply extended 345 /// qualifiers to an arbitrary type without requiring a context to 346 /// be pushed through every single API dealing with qualifiers. 347 ASTContext& Context; 348 349 /// BaseType - the underlying type that this qualifies 350 const Type *BaseType; 351 352 /// Quals - the immutable set of qualifiers applied by this 353 /// node; always contains extended qualifiers. 354 Qualifiers Quals; 355 356public: 357 ExtQuals(ASTContext& Context, const Type *Base, Qualifiers Quals) 358 : Context(Context), BaseType(Base), Quals(Quals) 359 { 360 assert(Quals.hasNonFastQualifiers() 361 && "ExtQuals created with no fast qualifiers"); 362 assert(!Quals.hasFastQualifiers() 363 && "ExtQuals created with fast qualifiers"); 364 } 365 366 Qualifiers getQualifiers() const { return Quals; } 367 368 bool hasVolatile() const { return Quals.hasVolatile(); } 369 370 bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } 371 Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } 372 373 bool hasAddressSpace() const { return Quals.hasAddressSpace(); } 374 unsigned getAddressSpace() const { return Quals.getAddressSpace(); } 375 376 const Type *getBaseType() const { return BaseType; } 377 378 ASTContext &getContext() const { return Context; } 379 380public: 381 void Profile(llvm::FoldingSetNodeID &ID) const { 382 Profile(ID, getBaseType(), Quals); 383 } 384 static void Profile(llvm::FoldingSetNodeID &ID, 385 const Type *BaseType, 386 Qualifiers Quals) { 387 assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!"); 388 ID.AddPointer(BaseType); 389 Quals.Profile(ID); 390 } 391}; 392 393/// CallingConv - Specifies the calling convention that a function uses. 394enum CallingConv { 395 CC_Default, 396 CC_C, // __attribute__((cdecl)) 397 CC_X86StdCall, // __attribute__((stdcall)) 398 CC_X86FastCall // __attribute__((fastcall)) 399}; 400 401 402/// QualType - For efficiency, we don't store CV-qualified types as nodes on 403/// their own: instead each reference to a type stores the qualifiers. This 404/// greatly reduces the number of nodes we need to allocate for types (for 405/// example we only need one for 'int', 'const int', 'volatile int', 406/// 'const volatile int', etc). 407/// 408/// As an added efficiency bonus, instead of making this a pair, we 409/// just store the two bits we care about in the low bits of the 410/// pointer. To handle the packing/unpacking, we make QualType be a 411/// simple wrapper class that acts like a smart pointer. A third bit 412/// indicates whether there are extended qualifiers present, in which 413/// case the pointer points to a special structure. 414class QualType { 415 // Thankfully, these are efficiently composable. 416 llvm::PointerIntPair<llvm::PointerUnion<const Type*,const ExtQuals*>, 417 Qualifiers::FastWidth> Value; 418 419 const ExtQuals *getExtQualsUnsafe() const { 420 return Value.getPointer().get<const ExtQuals*>(); 421 } 422 423 const Type *getTypePtrUnsafe() const { 424 return Value.getPointer().get<const Type*>(); 425 } 426 427 QualType getUnqualifiedTypeSlow() const; 428 429 friend class QualifierCollector; 430public: 431 QualType() {} 432 433 QualType(const Type *Ptr, unsigned Quals) 434 : Value(Ptr, Quals) {} 435 QualType(const ExtQuals *Ptr, unsigned Quals) 436 : Value(Ptr, Quals) {} 437 438 unsigned getLocalFastQualifiers() const { return Value.getInt(); } 439 void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); } 440 441 /// Retrieves a pointer to the underlying (unqualified) type. 442 /// This should really return a const Type, but it's not worth 443 /// changing all the users right now. 444 Type *getTypePtr() const { 445 if (hasLocalNonFastQualifiers()) 446 return const_cast<Type*>(getExtQualsUnsafe()->getBaseType()); 447 return const_cast<Type*>(getTypePtrUnsafe()); 448 } 449 450 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 451 static QualType getFromOpaquePtr(void *Ptr) { 452 QualType T; 453 T.Value.setFromOpaqueValue(Ptr); 454 return T; 455 } 456 457 Type &operator*() const { 458 return *getTypePtr(); 459 } 460 461 Type *operator->() const { 462 return getTypePtr(); 463 } 464 465 bool isCanonical() const; 466 bool isCanonicalAsParam() const; 467 468 /// isNull - Return true if this QualType doesn't point to a type yet. 469 bool isNull() const { 470 return Value.getPointer().isNull(); 471 } 472 473 /// \brief Determine whether this particular QualType instance has the 474 /// "const" qualifier set, without looking through typedefs that may have 475 /// added "const" at a different level. 476 bool isLocalConstQualified() const { 477 return (getLocalFastQualifiers() & Qualifiers::Const); 478 } 479 480 /// \brief Determine whether this type is const-qualified. 481 bool isConstQualified() const; 482 483 /// \brief Determine whether this particular QualType instance has the 484 /// "restrict" qualifier set, without looking through typedefs that may have 485 /// added "restrict" at a different level. 486 bool isLocalRestrictQualified() const { 487 return (getLocalFastQualifiers() & Qualifiers::Restrict); 488 } 489 490 /// \brief Determine whether this type is restrict-qualified. 491 bool isRestrictQualified() const; 492 493 /// \brief Determine whether this particular QualType instance has the 494 /// "volatile" qualifier set, without looking through typedefs that may have 495 /// added "volatile" at a different level. 496 bool isLocalVolatileQualified() const { 497 return (hasLocalNonFastQualifiers() && getExtQualsUnsafe()->hasVolatile()); 498 } 499 500 /// \brief Determine whether this type is volatile-qualified. 501 bool isVolatileQualified() const; 502 503 /// \brief Determine whether this particular QualType instance has any 504 /// qualifiers, without looking through any typedefs that might add 505 /// qualifiers at a different level. 506 bool hasLocalQualifiers() const { 507 return getLocalFastQualifiers() || hasLocalNonFastQualifiers(); 508 } 509 510 /// \brief Determine whether this type has any qualifiers. 511 bool hasQualifiers() const; 512 513 /// \brief Determine whether this particular QualType instance has any 514 /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType 515 /// instance. 516 bool hasLocalNonFastQualifiers() const { 517 return Value.getPointer().is<const ExtQuals*>(); 518 } 519 520 /// \brief Retrieve the set of qualifiers local to this particular QualType 521 /// instance, not including any qualifiers acquired through typedefs or 522 /// other sugar. 523 Qualifiers getLocalQualifiers() const { 524 Qualifiers Quals; 525 if (hasLocalNonFastQualifiers()) 526 Quals = getExtQualsUnsafe()->getQualifiers(); 527 Quals.addFastQualifiers(getLocalFastQualifiers()); 528 return Quals; 529 } 530 531 /// \brief Retrieve the set of qualifiers applied to this type. 532 Qualifiers getQualifiers() const; 533 534 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 535 /// local to this particular QualType instance, not including any qualifiers 536 /// acquired through typedefs or other sugar. 537 unsigned getLocalCVRQualifiers() const { 538 unsigned CVR = getLocalFastQualifiers(); 539 if (isLocalVolatileQualified()) 540 CVR |= Qualifiers::Volatile; 541 return CVR; 542 } 543 544 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 545 /// applied to this type. 546 unsigned getCVRQualifiers() const; 547 548 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 549 /// applied to this type, looking through any number of unqualified array 550 /// types to their element types' qualifiers. 551 unsigned getCVRQualifiersThroughArrayTypes() const; 552 553 bool isConstant(ASTContext& Ctx) const { 554 return QualType::isConstant(*this, Ctx); 555 } 556 557 // Don't promise in the API that anything besides 'const' can be 558 // easily added. 559 560 /// addConst - add the specified type qualifier to this QualType. 561 void addConst() { 562 addFastQualifiers(Qualifiers::Const); 563 } 564 QualType withConst() const { 565 return withFastQualifiers(Qualifiers::Const); 566 } 567 568 void addFastQualifiers(unsigned TQs) { 569 assert(!(TQs & ~Qualifiers::FastMask) 570 && "non-fast qualifier bits set in mask!"); 571 Value.setInt(Value.getInt() | TQs); 572 } 573 574 // FIXME: The remove* functions are semantically broken, because they might 575 // not remove a qualifier stored on a typedef. Most of the with* functions 576 // have the same problem. 577 void removeConst(); 578 void removeVolatile(); 579 void removeRestrict(); 580 void removeCVRQualifiers(unsigned Mask); 581 582 void removeFastQualifiers() { Value.setInt(0); } 583 void removeFastQualifiers(unsigned Mask) { 584 assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers"); 585 Value.setInt(Value.getInt() & ~Mask); 586 } 587 588 // Creates a type with the given qualifiers in addition to any 589 // qualifiers already on this type. 590 QualType withFastQualifiers(unsigned TQs) const { 591 QualType T = *this; 592 T.addFastQualifiers(TQs); 593 return T; 594 } 595 596 // Creates a type with exactly the given fast qualifiers, removing 597 // any existing fast qualifiers. 598 QualType withExactFastQualifiers(unsigned TQs) const { 599 return withoutFastQualifiers().withFastQualifiers(TQs); 600 } 601 602 // Removes fast qualifiers, but leaves any extended qualifiers in place. 603 QualType withoutFastQualifiers() const { 604 QualType T = *this; 605 T.removeFastQualifiers(); 606 return T; 607 } 608 609 /// \brief Return this type with all of the instance-specific qualifiers 610 /// removed, but without removing any qualifiers that may have been applied 611 /// through typedefs. 612 QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); } 613 614 /// \brief Return the unqualified form of the given type, which might be 615 /// desugared to eliminate qualifiers introduced via typedefs. 616 QualType getUnqualifiedType() const { 617 QualType T = getLocalUnqualifiedType(); 618 if (!T.hasQualifiers()) 619 return T; 620 621 return getUnqualifiedTypeSlow(); 622 } 623 624 bool isMoreQualifiedThan(QualType Other) const; 625 bool isAtLeastAsQualifiedAs(QualType Other) const; 626 QualType getNonReferenceType() const; 627 628 /// getDesugaredType - Return the specified type with any "sugar" removed from 629 /// the type. This takes off typedefs, typeof's etc. If the outer level of 630 /// the type is already concrete, it returns it unmodified. This is similar 631 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 632 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 633 /// concrete. 634 /// 635 /// Qualifiers are left in place. 636 QualType getDesugaredType() const { 637 return QualType::getDesugaredType(*this); 638 } 639 640 /// operator==/!= - Indicate whether the specified types and qualifiers are 641 /// identical. 642 friend bool operator==(const QualType &LHS, const QualType &RHS) { 643 return LHS.Value == RHS.Value; 644 } 645 friend bool operator!=(const QualType &LHS, const QualType &RHS) { 646 return LHS.Value != RHS.Value; 647 } 648 std::string getAsString() const; 649 650 std::string getAsString(const PrintingPolicy &Policy) const { 651 std::string S; 652 getAsStringInternal(S, Policy); 653 return S; 654 } 655 void getAsStringInternal(std::string &Str, 656 const PrintingPolicy &Policy) const; 657 658 void dump(const char *s) const; 659 void dump() const; 660 661 void Profile(llvm::FoldingSetNodeID &ID) const { 662 ID.AddPointer(getAsOpaquePtr()); 663 } 664 665 /// getAddressSpace - Return the address space of this type. 666 inline unsigned getAddressSpace() const; 667 668 /// GCAttrTypesAttr - Returns gc attribute of this type. 669 inline Qualifiers::GC getObjCGCAttr() const; 670 671 /// isObjCGCWeak true when Type is objc's weak. 672 bool isObjCGCWeak() const { 673 return getObjCGCAttr() == Qualifiers::Weak; 674 } 675 676 /// isObjCGCStrong true when Type is objc's strong. 677 bool isObjCGCStrong() const { 678 return getObjCGCAttr() == Qualifiers::Strong; 679 } 680 681 /// getNoReturnAttr - Returns true if the type has the noreturn attribute, 682 /// false otherwise. 683 bool getNoReturnAttr() const; 684 685 /// getCallConv - Returns the calling convention of the type if the type 686 /// is a function type, CC_Default otherwise. 687 CallingConv getCallConv() const; 688 689private: 690 // These methods are implemented in a separate translation unit; 691 // "static"-ize them to avoid creating temporary QualTypes in the 692 // caller. 693 static bool isConstant(QualType T, ASTContext& Ctx); 694 static QualType getDesugaredType(QualType T); 695}; 696 697} // end clang. 698 699namespace llvm { 700/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 701/// to a specific Type class. 702template<> struct simplify_type<const ::clang::QualType> { 703 typedef ::clang::Type* SimpleType; 704 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 705 return Val.getTypePtr(); 706 } 707}; 708template<> struct simplify_type< ::clang::QualType> 709 : public simplify_type<const ::clang::QualType> {}; 710 711// Teach SmallPtrSet that QualType is "basically a pointer". 712template<> 713class PointerLikeTypeTraits<clang::QualType> { 714public: 715 static inline void *getAsVoidPointer(clang::QualType P) { 716 return P.getAsOpaquePtr(); 717 } 718 static inline clang::QualType getFromVoidPointer(void *P) { 719 return clang::QualType::getFromOpaquePtr(P); 720 } 721 // Various qualifiers go in low bits. 722 enum { NumLowBitsAvailable = 0 }; 723}; 724 725} // end namespace llvm 726 727namespace clang { 728 729/// Type - This is the base class of the type hierarchy. A central concept 730/// with types is that each type always has a canonical type. A canonical type 731/// is the type with any typedef names stripped out of it or the types it 732/// references. For example, consider: 733/// 734/// typedef int foo; 735/// typedef foo* bar; 736/// 'int *' 'foo *' 'bar' 737/// 738/// There will be a Type object created for 'int'. Since int is canonical, its 739/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 740/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 741/// there is a PointerType that represents 'int*', which, like 'int', is 742/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 743/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 744/// is also 'int*'. 745/// 746/// Non-canonical types are useful for emitting diagnostics, without losing 747/// information about typedefs being used. Canonical types are useful for type 748/// comparisons (they allow by-pointer equality tests) and useful for reasoning 749/// about whether something has a particular form (e.g. is a function type), 750/// because they implicitly, recursively, strip all typedefs out of a type. 751/// 752/// Types, once created, are immutable. 753/// 754class Type { 755public: 756 enum TypeClass { 757#define TYPE(Class, Base) Class, 758#define LAST_TYPE(Class) TypeLast = Class, 759#define ABSTRACT_TYPE(Class, Base) 760#include "clang/AST/TypeNodes.def" 761 TagFirst = Record, TagLast = Enum 762 }; 763 764private: 765 QualType CanonicalType; 766 767 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 768 unsigned TC : 8; 769 770 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 771 /// Note that this should stay at the end of the ivars for Type so that 772 /// subclasses can pack their bitfields into the same word. 773 bool Dependent : 1; 774 775 Type(const Type&); // DO NOT IMPLEMENT. 776 void operator=(const Type&); // DO NOT IMPLEMENT. 777protected: 778 // silence VC++ warning C4355: 'this' : used in base member initializer list 779 Type *this_() { return this; } 780 Type(TypeClass tc, QualType Canonical, bool dependent) 781 : CanonicalType(Canonical.isNull() ? QualType(this_(), 0) : Canonical), 782 TC(tc), Dependent(dependent) {} 783 virtual ~Type() {} 784 virtual void Destroy(ASTContext& C); 785 friend class ASTContext; 786 787public: 788 TypeClass getTypeClass() const { return static_cast<TypeClass>(TC); } 789 790 bool isCanonicalUnqualified() const { 791 return CanonicalType.getTypePtr() == this; 792 } 793 794 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 795 /// object types, function types, and incomplete types. 796 797 /// \brief Determines whether the type describes an object in memory. 798 /// 799 /// Note that this definition of object type corresponds to the C++ 800 /// definition of object type, which includes incomplete types, as 801 /// opposed to the C definition (which does not include incomplete 802 /// types). 803 bool isObjectType() const; 804 805 /// isIncompleteType - Return true if this is an incomplete type. 806 /// A type that can describe objects, but which lacks information needed to 807 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 808 /// routine will need to determine if the size is actually required. 809 bool isIncompleteType() const; 810 811 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 812 /// type, in other words, not a function type. 813 bool isIncompleteOrObjectType() const { 814 return !isFunctionType(); 815 } 816 817 /// isPODType - Return true if this is a plain-old-data type (C++ 3.9p10). 818 bool isPODType() const; 819 820 /// isLiteralType - Return true if this is a literal type 821 /// (C++0x [basic.types]p10) 822 bool isLiteralType() const; 823 824 /// isVariablyModifiedType (C99 6.7.5.2p2) - Return true for variable array 825 /// types that have a non-constant expression. This does not include "[]". 826 bool isVariablyModifiedType() const; 827 828 /// Helper methods to distinguish type categories. All type predicates 829 /// operate on the canonical type, ignoring typedefs and qualifiers. 830 831 /// isSpecificBuiltinType - Test for a particular builtin type. 832 bool isSpecificBuiltinType(unsigned K) const; 833 834 /// isIntegerType() does *not* include complex integers (a GCC extension). 835 /// isComplexIntegerType() can be used to test for complex integers. 836 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 837 bool isEnumeralType() const; 838 bool isBooleanType() const; 839 bool isCharType() const; 840 bool isWideCharType() const; 841 bool isAnyCharacterType() const; 842 bool isIntegralType() const; 843 844 /// Floating point categories. 845 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 846 /// isComplexType() does *not* include complex integers (a GCC extension). 847 /// isComplexIntegerType() can be used to test for complex integers. 848 bool isComplexType() const; // C99 6.2.5p11 (complex) 849 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 850 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 851 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 852 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 853 bool isVoidType() const; // C99 6.2.5p19 854 bool isDerivedType() const; // C99 6.2.5p20 855 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 856 bool isAggregateType() const; 857 858 // Type Predicates: Check to see if this type is structurally the specified 859 // type, ignoring typedefs and qualifiers. 860 bool isFunctionType() const; 861 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 862 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 863 bool isPointerType() const; 864 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 865 bool isBlockPointerType() const; 866 bool isVoidPointerType() const; 867 bool isReferenceType() const; 868 bool isLValueReferenceType() const; 869 bool isRValueReferenceType() const; 870 bool isFunctionPointerType() const; 871 bool isMemberPointerType() const; 872 bool isMemberFunctionPointerType() const; 873 bool isArrayType() const; 874 bool isConstantArrayType() const; 875 bool isIncompleteArrayType() const; 876 bool isVariableArrayType() const; 877 bool isDependentSizedArrayType() const; 878 bool isRecordType() const; 879 bool isClassType() const; 880 bool isStructureType() const; 881 bool isUnionType() const; 882 bool isComplexIntegerType() const; // GCC _Complex integer type. 883 bool isVectorType() const; // GCC vector type. 884 bool isExtVectorType() const; // Extended vector type. 885 bool isObjCObjectPointerType() const; // Pointer to *any* ObjC object. 886 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 887 // for the common case. 888 bool isObjCInterfaceType() const; // NSString or NSString<foo> 889 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 890 bool isObjCQualifiedIdType() const; // id<foo> 891 bool isObjCQualifiedClassType() const; // Class<foo> 892 bool isObjCIdType() const; // id 893 bool isObjCClassType() const; // Class 894 bool isObjCSelType() const; // Class 895 bool isObjCBuiltinType() const; // 'id' or 'Class' 896 bool isTemplateTypeParmType() const; // C++ template type parameter 897 bool isNullPtrType() const; // C++0x nullptr_t 898 899 /// isDependentType - Whether this type is a dependent type, meaning 900 /// that its definition somehow depends on a template parameter 901 /// (C++ [temp.dep.type]). 902 bool isDependentType() const { return Dependent; } 903 bool isOverloadableType() 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 ObjCInterfaceType *getAsObjCQualifiedInterfaceType() const; 927 const CXXRecordDecl *getCXXRecordDeclForPointerType() const; 928 929 // Member-template getAs<specific type>'. This scheme will eventually 930 // replace the specific getAsXXXX methods above. 931 // 932 // There are some specializations of this member template listed 933 // immediately following this class. 934 template <typename T> const T *getAs() const; 935 936 /// getAsPointerToObjCInterfaceType - If this is a pointer to an ObjC 937 /// interface, return the interface type, otherwise return null. 938 const ObjCInterfaceType *getAsPointerToObjCInterfaceType() const; 939 940 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 941 /// element type of the array, potentially with type qualifiers missing. 942 /// This method should never be used when type qualifiers are meaningful. 943 const Type *getArrayElementTypeNoTypeQual() const; 944 945 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 946 /// pointer, this returns the respective pointee. 947 QualType getPointeeType() const; 948 949 /// getUnqualifiedDesugaredType() - Return the specified type with 950 /// any "sugar" removed from the type, removing any typedefs, 951 /// typeofs, etc., as well as any qualifiers. 952 const Type *getUnqualifiedDesugaredType() const; 953 954 /// More type predicates useful for type checking/promotion 955 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 956 957 /// isSignedIntegerType - Return true if this is an integer type that is 958 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 959 /// an enum decl which has a signed representation, or a vector of signed 960 /// integer element type. 961 bool isSignedIntegerType() const; 962 963 /// isUnsignedIntegerType - Return true if this is an integer type that is 964 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 965 /// decl which has an unsigned representation, or a vector of unsigned integer 966 /// element type. 967 bool isUnsignedIntegerType() const; 968 969 /// isConstantSizeType - Return true if this is not a variable sized type, 970 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 971 /// incomplete types. 972 bool isConstantSizeType() const; 973 974 /// isSpecifierType - Returns true if this type can be represented by some 975 /// set of type specifiers. 976 bool isSpecifierType() const; 977 978 const char *getTypeClassName() const; 979 980 /// \brief Determine the linkage of this type. 981 virtual Linkage getLinkage() const; 982 983 QualType getCanonicalTypeInternal() const { 984 return CanonicalType; 985 } 986 CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h 987 void dump() const; 988 static bool classof(const Type *) { return true; } 989}; 990 991template <> inline const TypedefType *Type::getAs() const { 992 return dyn_cast<TypedefType>(this); 993} 994 995// We can do canonical leaf types faster, because we don't have to 996// worry about preserving child type decoration. 997#define TYPE(Class, Base) 998#define LEAF_TYPE(Class) \ 999template <> inline const Class##Type *Type::getAs() const { \ 1000 return dyn_cast<Class##Type>(CanonicalType); \ 1001} 1002#include "clang/AST/TypeNodes.def" 1003 1004 1005/// BuiltinType - This class is used for builtin types like 'int'. Builtin 1006/// types are always canonical and have a literal name field. 1007class BuiltinType : public Type { 1008public: 1009 enum Kind { 1010 Void, 1011 1012 Bool, // This is bool and/or _Bool. 1013 Char_U, // This is 'char' for targets where char is unsigned. 1014 UChar, // This is explicitly qualified unsigned char. 1015 Char16, // This is 'char16_t' for C++. 1016 Char32, // This is 'char32_t' for C++. 1017 UShort, 1018 UInt, 1019 ULong, 1020 ULongLong, 1021 UInt128, // __uint128_t 1022 1023 Char_S, // This is 'char' for targets where char is signed. 1024 SChar, // This is explicitly qualified signed char. 1025 WChar, // This is 'wchar_t' for C++. 1026 Short, 1027 Int, 1028 Long, 1029 LongLong, 1030 Int128, // __int128_t 1031 1032 Float, Double, LongDouble, 1033 1034 NullPtr, // This is the type of C++0x 'nullptr'. 1035 1036 Overload, // This represents the type of an overloaded function declaration. 1037 Dependent, // This represents the type of a type-dependent expression. 1038 1039 UndeducedAuto, // In C++0x, this represents the type of an auto variable 1040 // that has not been deduced yet. 1041 ObjCId, // This represents the ObjC 'id' type. 1042 ObjCClass, // This represents the ObjC 'Class' type. 1043 ObjCSel // This represents the ObjC 'SEL' type. 1044 }; 1045private: 1046 Kind TypeKind; 1047public: 1048 BuiltinType(Kind K) 1049 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent)), 1050 TypeKind(K) {} 1051 1052 Kind getKind() const { return TypeKind; } 1053 const char *getName(const LangOptions &LO) const; 1054 1055 bool isSugared() const { return false; } 1056 QualType desugar() const { return QualType(this, 0); } 1057 1058 bool isInteger() const { 1059 return TypeKind >= Bool && TypeKind <= Int128; 1060 } 1061 1062 bool isSignedInteger() const { 1063 return TypeKind >= Char_S && TypeKind <= Int128; 1064 } 1065 1066 bool isUnsignedInteger() const { 1067 return TypeKind >= Bool && TypeKind <= UInt128; 1068 } 1069 1070 bool isFloatingPoint() const { 1071 return TypeKind >= Float && TypeKind <= LongDouble; 1072 } 1073 1074 virtual Linkage getLinkage() const; 1075 1076 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1077 static bool classof(const BuiltinType *) { return true; } 1078}; 1079 1080/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1081/// types (_Complex float etc) as well as the GCC integer complex extensions. 1082/// 1083class ComplexType : public Type, public llvm::FoldingSetNode { 1084 QualType ElementType; 1085 ComplexType(QualType Element, QualType CanonicalPtr) : 1086 Type(Complex, CanonicalPtr, Element->isDependentType()), 1087 ElementType(Element) { 1088 } 1089 friend class ASTContext; // ASTContext creates these. 1090public: 1091 QualType getElementType() const { return ElementType; } 1092 1093 bool isSugared() const { return false; } 1094 QualType desugar() const { return QualType(this, 0); } 1095 1096 void Profile(llvm::FoldingSetNodeID &ID) { 1097 Profile(ID, getElementType()); 1098 } 1099 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1100 ID.AddPointer(Element.getAsOpaquePtr()); 1101 } 1102 1103 virtual Linkage getLinkage() const; 1104 1105 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1106 static bool classof(const ComplexType *) { return true; } 1107}; 1108 1109/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1110/// 1111class PointerType : public Type, public llvm::FoldingSetNode { 1112 QualType PointeeType; 1113 1114 PointerType(QualType Pointee, QualType CanonicalPtr) : 1115 Type(Pointer, CanonicalPtr, Pointee->isDependentType()), PointeeType(Pointee) { 1116 } 1117 friend class ASTContext; // ASTContext creates these. 1118public: 1119 1120 QualType getPointeeType() const { return PointeeType; } 1121 1122 bool isSugared() const { return false; } 1123 QualType desugar() const { return QualType(this, 0); } 1124 1125 void Profile(llvm::FoldingSetNodeID &ID) { 1126 Profile(ID, getPointeeType()); 1127 } 1128 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1129 ID.AddPointer(Pointee.getAsOpaquePtr()); 1130 } 1131 1132 virtual Linkage getLinkage() const; 1133 1134 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1135 static bool classof(const PointerType *) { return true; } 1136}; 1137 1138/// BlockPointerType - pointer to a block type. 1139/// This type is to represent types syntactically represented as 1140/// "void (^)(int)", etc. Pointee is required to always be a function type. 1141/// 1142class BlockPointerType : public Type, public llvm::FoldingSetNode { 1143 QualType PointeeType; // Block is some kind of pointer type 1144 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1145 Type(BlockPointer, CanonicalCls, Pointee->isDependentType()), 1146 PointeeType(Pointee) { 1147 } 1148 friend class ASTContext; // ASTContext creates these. 1149public: 1150 1151 // Get the pointee type. Pointee is required to always be a function type. 1152 QualType getPointeeType() const { return PointeeType; } 1153 1154 bool isSugared() const { return false; } 1155 QualType desugar() const { return QualType(this, 0); } 1156 1157 void Profile(llvm::FoldingSetNodeID &ID) { 1158 Profile(ID, getPointeeType()); 1159 } 1160 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1161 ID.AddPointer(Pointee.getAsOpaquePtr()); 1162 } 1163 1164 virtual Linkage getLinkage() const; 1165 1166 static bool classof(const Type *T) { 1167 return T->getTypeClass() == BlockPointer; 1168 } 1169 static bool classof(const BlockPointerType *) { return true; } 1170}; 1171 1172/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 1173/// 1174class ReferenceType : public Type, public llvm::FoldingSetNode { 1175 QualType PointeeType; 1176 1177 /// True if the type was originally spelled with an lvalue sigil. 1178 /// This is never true of rvalue references but can also be false 1179 /// on lvalue references because of C++0x [dcl.typedef]p9, 1180 /// as follows: 1181 /// 1182 /// typedef int &ref; // lvalue, spelled lvalue 1183 /// typedef int &&rvref; // rvalue 1184 /// ref &a; // lvalue, inner ref, spelled lvalue 1185 /// ref &&a; // lvalue, inner ref 1186 /// rvref &a; // lvalue, inner ref, spelled lvalue 1187 /// rvref &&a; // rvalue, inner ref 1188 bool SpelledAsLValue; 1189 1190 /// True if the inner type is a reference type. This only happens 1191 /// in non-canonical forms. 1192 bool InnerRef; 1193 1194protected: 1195 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 1196 bool SpelledAsLValue) : 1197 Type(tc, CanonicalRef, Referencee->isDependentType()), 1198 PointeeType(Referencee), SpelledAsLValue(SpelledAsLValue), 1199 InnerRef(Referencee->isReferenceType()) { 1200 } 1201public: 1202 bool isSpelledAsLValue() const { return SpelledAsLValue; } 1203 bool isInnerRef() const { return InnerRef; } 1204 1205 QualType getPointeeTypeAsWritten() const { return PointeeType; } 1206 QualType getPointeeType() const { 1207 // FIXME: this might strip inner qualifiers; okay? 1208 const ReferenceType *T = this; 1209 while (T->InnerRef) 1210 T = T->PointeeType->getAs<ReferenceType>(); 1211 return T->PointeeType; 1212 } 1213 1214 void Profile(llvm::FoldingSetNodeID &ID) { 1215 Profile(ID, PointeeType, SpelledAsLValue); 1216 } 1217 static void Profile(llvm::FoldingSetNodeID &ID, 1218 QualType Referencee, 1219 bool SpelledAsLValue) { 1220 ID.AddPointer(Referencee.getAsOpaquePtr()); 1221 ID.AddBoolean(SpelledAsLValue); 1222 } 1223 1224 virtual Linkage getLinkage() const; 1225 1226 static bool classof(const Type *T) { 1227 return T->getTypeClass() == LValueReference || 1228 T->getTypeClass() == RValueReference; 1229 } 1230 static bool classof(const ReferenceType *) { return true; } 1231}; 1232 1233/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 1234/// 1235class LValueReferenceType : public ReferenceType { 1236 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 1237 bool SpelledAsLValue) : 1238 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 1239 {} 1240 friend class ASTContext; // ASTContext creates these 1241public: 1242 bool isSugared() const { return false; } 1243 QualType desugar() const { return QualType(this, 0); } 1244 1245 static bool classof(const Type *T) { 1246 return T->getTypeClass() == LValueReference; 1247 } 1248 static bool classof(const LValueReferenceType *) { return true; } 1249}; 1250 1251/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 1252/// 1253class RValueReferenceType : public ReferenceType { 1254 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 1255 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 1256 } 1257 friend class ASTContext; // ASTContext creates these 1258public: 1259 bool isSugared() const { return false; } 1260 QualType desugar() const { return QualType(this, 0); } 1261 1262 static bool classof(const Type *T) { 1263 return T->getTypeClass() == RValueReference; 1264 } 1265 static bool classof(const RValueReferenceType *) { return true; } 1266}; 1267 1268/// MemberPointerType - C++ 8.3.3 - Pointers to members 1269/// 1270class MemberPointerType : public Type, public llvm::FoldingSetNode { 1271 QualType PointeeType; 1272 /// The class of which the pointee is a member. Must ultimately be a 1273 /// RecordType, but could be a typedef or a template parameter too. 1274 const Type *Class; 1275 1276 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 1277 Type(MemberPointer, CanonicalPtr, 1278 Cls->isDependentType() || Pointee->isDependentType()), 1279 PointeeType(Pointee), Class(Cls) { 1280 } 1281 friend class ASTContext; // ASTContext creates these. 1282public: 1283 1284 QualType getPointeeType() const { return PointeeType; } 1285 1286 const Type *getClass() const { return Class; } 1287 1288 bool isSugared() const { return false; } 1289 QualType desugar() const { return QualType(this, 0); } 1290 1291 void Profile(llvm::FoldingSetNodeID &ID) { 1292 Profile(ID, getPointeeType(), getClass()); 1293 } 1294 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 1295 const Type *Class) { 1296 ID.AddPointer(Pointee.getAsOpaquePtr()); 1297 ID.AddPointer(Class); 1298 } 1299 1300 virtual Linkage getLinkage() const; 1301 1302 static bool classof(const Type *T) { 1303 return T->getTypeClass() == MemberPointer; 1304 } 1305 static bool classof(const MemberPointerType *) { return true; } 1306}; 1307 1308/// ArrayType - C99 6.7.5.2 - Array Declarators. 1309/// 1310class ArrayType : public Type, public llvm::FoldingSetNode { 1311public: 1312 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 1313 /// an array with a static size (e.g. int X[static 4]), or an array 1314 /// with a star size (e.g. int X[*]). 1315 /// 'static' is only allowed on function parameters. 1316 enum ArraySizeModifier { 1317 Normal, Static, Star 1318 }; 1319private: 1320 /// ElementType - The element type of the array. 1321 QualType ElementType; 1322 1323 // NOTE: VC++ treats enums as signed, avoid using the ArraySizeModifier enum 1324 /// NOTE: These fields are packed into the bitfields space in the Type class. 1325 unsigned SizeModifier : 2; 1326 1327 /// IndexTypeQuals - Capture qualifiers in declarations like: 1328 /// 'int X[static restrict 4]'. For function parameters only. 1329 unsigned IndexTypeQuals : 3; 1330 1331protected: 1332 // C++ [temp.dep.type]p1: 1333 // A type is dependent if it is... 1334 // - an array type constructed from any dependent type or whose 1335 // size is specified by a constant expression that is 1336 // value-dependent, 1337 ArrayType(TypeClass tc, QualType et, QualType can, 1338 ArraySizeModifier sm, unsigned tq) 1339 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray), 1340 ElementType(et), SizeModifier(sm), IndexTypeQuals(tq) {} 1341 1342 friend class ASTContext; // ASTContext creates these. 1343public: 1344 QualType getElementType() const { return ElementType; } 1345 ArraySizeModifier getSizeModifier() const { 1346 return ArraySizeModifier(SizeModifier); 1347 } 1348 Qualifiers getIndexTypeQualifiers() const { 1349 return Qualifiers::fromCVRMask(IndexTypeQuals); 1350 } 1351 unsigned getIndexTypeCVRQualifiers() const { return IndexTypeQuals; } 1352 1353 virtual Linkage getLinkage() const; 1354 1355 static bool classof(const Type *T) { 1356 return T->getTypeClass() == ConstantArray || 1357 T->getTypeClass() == VariableArray || 1358 T->getTypeClass() == IncompleteArray || 1359 T->getTypeClass() == DependentSizedArray; 1360 } 1361 static bool classof(const ArrayType *) { return true; } 1362}; 1363 1364/// ConstantArrayType - This class represents the canonical version of 1365/// C arrays with a specified constant size. For example, the canonical 1366/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 1367/// type is 'int' and the size is 404. 1368class ConstantArrayType : public ArrayType { 1369 llvm::APInt Size; // Allows us to unique the type. 1370 1371 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 1372 ArraySizeModifier sm, unsigned tq) 1373 : ArrayType(ConstantArray, et, can, sm, tq), 1374 Size(size) {} 1375protected: 1376 ConstantArrayType(TypeClass tc, QualType et, QualType can, 1377 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 1378 : ArrayType(tc, et, can, sm, tq), Size(size) {} 1379 friend class ASTContext; // ASTContext creates these. 1380public: 1381 const llvm::APInt &getSize() const { return Size; } 1382 bool isSugared() const { return false; } 1383 QualType desugar() const { return QualType(this, 0); } 1384 1385 void Profile(llvm::FoldingSetNodeID &ID) { 1386 Profile(ID, getElementType(), getSize(), 1387 getSizeModifier(), getIndexTypeCVRQualifiers()); 1388 } 1389 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1390 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 1391 unsigned TypeQuals) { 1392 ID.AddPointer(ET.getAsOpaquePtr()); 1393 ID.AddInteger(ArraySize.getZExtValue()); 1394 ID.AddInteger(SizeMod); 1395 ID.AddInteger(TypeQuals); 1396 } 1397 static bool classof(const Type *T) { 1398 return T->getTypeClass() == ConstantArray; 1399 } 1400 static bool classof(const ConstantArrayType *) { return true; } 1401}; 1402 1403/// IncompleteArrayType - This class represents C arrays with an unspecified 1404/// size. For example 'int A[]' has an IncompleteArrayType where the element 1405/// type is 'int' and the size is unspecified. 1406class IncompleteArrayType : public ArrayType { 1407 1408 IncompleteArrayType(QualType et, QualType can, 1409 ArraySizeModifier sm, unsigned tq) 1410 : ArrayType(IncompleteArray, et, can, sm, tq) {} 1411 friend class ASTContext; // ASTContext creates these. 1412public: 1413 bool isSugared() const { return false; } 1414 QualType desugar() const { return QualType(this, 0); } 1415 1416 static bool classof(const Type *T) { 1417 return T->getTypeClass() == IncompleteArray; 1418 } 1419 static bool classof(const IncompleteArrayType *) { return true; } 1420 1421 friend class StmtIteratorBase; 1422 1423 void Profile(llvm::FoldingSetNodeID &ID) { 1424 Profile(ID, getElementType(), getSizeModifier(), 1425 getIndexTypeCVRQualifiers()); 1426 } 1427 1428 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1429 ArraySizeModifier SizeMod, unsigned TypeQuals) { 1430 ID.AddPointer(ET.getAsOpaquePtr()); 1431 ID.AddInteger(SizeMod); 1432 ID.AddInteger(TypeQuals); 1433 } 1434}; 1435 1436/// VariableArrayType - This class represents C arrays with a specified size 1437/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 1438/// Since the size expression is an arbitrary expression, we store it as such. 1439/// 1440/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 1441/// should not be: two lexically equivalent variable array types could mean 1442/// different things, for example, these variables do not have the same type 1443/// dynamically: 1444/// 1445/// void foo(int x) { 1446/// int Y[x]; 1447/// ++x; 1448/// int Z[x]; 1449/// } 1450/// 1451class VariableArrayType : public ArrayType { 1452 /// SizeExpr - An assignment expression. VLA's are only permitted within 1453 /// a function block. 1454 Stmt *SizeExpr; 1455 /// Brackets - The left and right array brackets. 1456 SourceRange Brackets; 1457 1458 VariableArrayType(QualType et, QualType can, Expr *e, 1459 ArraySizeModifier sm, unsigned tq, 1460 SourceRange brackets) 1461 : ArrayType(VariableArray, et, can, sm, tq), 1462 SizeExpr((Stmt*) e), Brackets(brackets) {} 1463 friend class ASTContext; // ASTContext creates these. 1464 virtual void Destroy(ASTContext& C); 1465 1466public: 1467 Expr *getSizeExpr() const { 1468 // We use C-style casts instead of cast<> here because we do not wish 1469 // to have a dependency of Type.h on Stmt.h/Expr.h. 1470 return (Expr*) SizeExpr; 1471 } 1472 SourceRange getBracketsRange() const { return Brackets; } 1473 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1474 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1475 1476 bool isSugared() const { return false; } 1477 QualType desugar() const { return QualType(this, 0); } 1478 1479 static bool classof(const Type *T) { 1480 return T->getTypeClass() == VariableArray; 1481 } 1482 static bool classof(const VariableArrayType *) { return true; } 1483 1484 friend class StmtIteratorBase; 1485 1486 void Profile(llvm::FoldingSetNodeID &ID) { 1487 assert(0 && "Cannnot unique VariableArrayTypes."); 1488 } 1489}; 1490 1491/// DependentSizedArrayType - This type represents an array type in 1492/// C++ whose size is a value-dependent expression. For example: 1493/// 1494/// \code 1495/// template<typename T, int Size> 1496/// class array { 1497/// T data[Size]; 1498/// }; 1499/// \endcode 1500/// 1501/// For these types, we won't actually know what the array bound is 1502/// until template instantiation occurs, at which point this will 1503/// become either a ConstantArrayType or a VariableArrayType. 1504class DependentSizedArrayType : public ArrayType { 1505 ASTContext &Context; 1506 1507 /// \brief An assignment expression that will instantiate to the 1508 /// size of the array. 1509 /// 1510 /// The expression itself might be NULL, in which case the array 1511 /// type will have its size deduced from an initializer. 1512 Stmt *SizeExpr; 1513 1514 /// Brackets - The left and right array brackets. 1515 SourceRange Brackets; 1516 1517 DependentSizedArrayType(ASTContext &Context, QualType et, QualType can, 1518 Expr *e, ArraySizeModifier sm, unsigned tq, 1519 SourceRange brackets) 1520 : ArrayType(DependentSizedArray, et, can, sm, tq), 1521 Context(Context), SizeExpr((Stmt*) e), Brackets(brackets) {} 1522 friend class ASTContext; // ASTContext creates these. 1523 virtual void Destroy(ASTContext& C); 1524 1525public: 1526 Expr *getSizeExpr() const { 1527 // We use C-style casts instead of cast<> here because we do not wish 1528 // to have a dependency of Type.h on Stmt.h/Expr.h. 1529 return (Expr*) SizeExpr; 1530 } 1531 SourceRange getBracketsRange() const { return Brackets; } 1532 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1533 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1534 1535 bool isSugared() const { return false; } 1536 QualType desugar() const { return QualType(this, 0); } 1537 1538 static bool classof(const Type *T) { 1539 return T->getTypeClass() == DependentSizedArray; 1540 } 1541 static bool classof(const DependentSizedArrayType *) { return true; } 1542 1543 friend class StmtIteratorBase; 1544 1545 1546 void Profile(llvm::FoldingSetNodeID &ID) { 1547 Profile(ID, Context, getElementType(), 1548 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 1549 } 1550 1551 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1552 QualType ET, ArraySizeModifier SizeMod, 1553 unsigned TypeQuals, Expr *E); 1554}; 1555 1556/// DependentSizedExtVectorType - This type represent an extended vector type 1557/// where either the type or size is dependent. For example: 1558/// @code 1559/// template<typename T, int Size> 1560/// class vector { 1561/// typedef T __attribute__((ext_vector_type(Size))) type; 1562/// } 1563/// @endcode 1564class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 1565 ASTContext &Context; 1566 Expr *SizeExpr; 1567 /// ElementType - The element type of the array. 1568 QualType ElementType; 1569 SourceLocation loc; 1570 1571 DependentSizedExtVectorType(ASTContext &Context, QualType ElementType, 1572 QualType can, Expr *SizeExpr, SourceLocation loc) 1573 : Type (DependentSizedExtVector, can, true), 1574 Context(Context), SizeExpr(SizeExpr), ElementType(ElementType), 1575 loc(loc) {} 1576 friend class ASTContext; 1577 virtual void Destroy(ASTContext& C); 1578 1579public: 1580 Expr *getSizeExpr() const { return SizeExpr; } 1581 QualType getElementType() const { return ElementType; } 1582 SourceLocation getAttributeLoc() const { return loc; } 1583 1584 bool isSugared() const { return false; } 1585 QualType desugar() const { return QualType(this, 0); } 1586 1587 static bool classof(const Type *T) { 1588 return T->getTypeClass() == DependentSizedExtVector; 1589 } 1590 static bool classof(const DependentSizedExtVectorType *) { return true; } 1591 1592 void Profile(llvm::FoldingSetNodeID &ID) { 1593 Profile(ID, Context, getElementType(), getSizeExpr()); 1594 } 1595 1596 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1597 QualType ElementType, Expr *SizeExpr); 1598}; 1599 1600 1601/// VectorType - GCC generic vector type. This type is created using 1602/// __attribute__((vector_size(n)), where "n" specifies the vector size in 1603/// bytes; or from an Altivec __vector or vector declaration. 1604/// Since the constructor takes the number of vector elements, the 1605/// client is responsible for converting the size into the number of elements. 1606class VectorType : public Type, public llvm::FoldingSetNode { 1607protected: 1608 /// ElementType - The element type of the vector. 1609 QualType ElementType; 1610 1611 /// NumElements - The number of elements in the vector. 1612 unsigned NumElements; 1613 1614 /// AltiVec - True if this is for an Altivec vector. 1615 bool AltiVec; 1616 1617 /// Pixel - True if this is for an Altivec vector pixel. 1618 bool Pixel; 1619 1620 VectorType(QualType vecType, unsigned nElements, QualType canonType, 1621 bool isAltiVec, bool isPixel) : 1622 Type(Vector, canonType, vecType->isDependentType()), 1623 ElementType(vecType), NumElements(nElements), 1624 AltiVec(isAltiVec), Pixel(isPixel) {} 1625 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 1626 QualType canonType, bool isAltiVec, bool isPixel) 1627 : Type(tc, canonType, vecType->isDependentType()), ElementType(vecType), 1628 NumElements(nElements), AltiVec(isAltiVec), Pixel(isPixel) {} 1629 friend class ASTContext; // ASTContext creates these. 1630public: 1631 1632 QualType getElementType() const { return ElementType; } 1633 unsigned getNumElements() const { return NumElements; } 1634 1635 bool isSugared() const { return false; } 1636 QualType desugar() const { return QualType(this, 0); } 1637 1638 bool isAltiVec() const { return AltiVec; } 1639 1640 bool isPixel() const { return Pixel; } 1641 1642 void Profile(llvm::FoldingSetNodeID &ID) { 1643 Profile(ID, getElementType(), getNumElements(), getTypeClass(), 1644 AltiVec, Pixel); 1645 } 1646 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 1647 unsigned NumElements, TypeClass TypeClass, 1648 bool isAltiVec, bool isPixel) { 1649 ID.AddPointer(ElementType.getAsOpaquePtr()); 1650 ID.AddInteger(NumElements); 1651 ID.AddInteger(TypeClass); 1652 ID.AddBoolean(isAltiVec); 1653 ID.AddBoolean(isPixel); 1654 } 1655 1656 virtual Linkage getLinkage() const; 1657 1658 static bool classof(const Type *T) { 1659 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 1660 } 1661 static bool classof(const VectorType *) { return true; } 1662}; 1663 1664/// ExtVectorType - Extended vector type. This type is created using 1665/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 1666/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 1667/// class enables syntactic extensions, like Vector Components for accessing 1668/// points, colors, and textures (modeled after OpenGL Shading Language). 1669class ExtVectorType : public VectorType { 1670 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 1671 VectorType(ExtVector, vecType, nElements, canonType, false, false) {} 1672 friend class ASTContext; // ASTContext creates these. 1673public: 1674 static int getPointAccessorIdx(char c) { 1675 switch (c) { 1676 default: return -1; 1677 case 'x': return 0; 1678 case 'y': return 1; 1679 case 'z': return 2; 1680 case 'w': return 3; 1681 } 1682 } 1683 static int getNumericAccessorIdx(char c) { 1684 switch (c) { 1685 default: return -1; 1686 case '0': return 0; 1687 case '1': return 1; 1688 case '2': return 2; 1689 case '3': return 3; 1690 case '4': return 4; 1691 case '5': return 5; 1692 case '6': return 6; 1693 case '7': return 7; 1694 case '8': return 8; 1695 case '9': return 9; 1696 case 'A': 1697 case 'a': return 10; 1698 case 'B': 1699 case 'b': return 11; 1700 case 'C': 1701 case 'c': return 12; 1702 case 'D': 1703 case 'd': return 13; 1704 case 'E': 1705 case 'e': return 14; 1706 case 'F': 1707 case 'f': return 15; 1708 } 1709 } 1710 1711 static int getAccessorIdx(char c) { 1712 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 1713 return getNumericAccessorIdx(c); 1714 } 1715 1716 bool isAccessorWithinNumElements(char c) const { 1717 if (int idx = getAccessorIdx(c)+1) 1718 return unsigned(idx-1) < NumElements; 1719 return false; 1720 } 1721 bool isSugared() const { return false; } 1722 QualType desugar() const { return QualType(this, 0); } 1723 1724 static bool classof(const Type *T) { 1725 return T->getTypeClass() == ExtVector; 1726 } 1727 static bool classof(const ExtVectorType *) { return true; } 1728}; 1729 1730/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 1731/// class of FunctionNoProtoType and FunctionProtoType. 1732/// 1733class FunctionType : public Type { 1734 /// SubClassData - This field is owned by the subclass, put here to pack 1735 /// tightly with the ivars in Type. 1736 bool SubClassData : 1; 1737 1738 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1739 /// other bitfields. 1740 /// The qualifiers are part of FunctionProtoType because... 1741 /// 1742 /// C++ 8.3.5p4: The return type, the parameter type list and the 1743 /// cv-qualifier-seq, [...], are part of the function type. 1744 /// 1745 unsigned TypeQuals : 3; 1746 1747 /// NoReturn - Indicates if the function type is attribute noreturn. 1748 unsigned NoReturn : 1; 1749 1750 /// CallConv - The calling convention used by the function. 1751 unsigned CallConv : 2; 1752 1753 // The type returned by the function. 1754 QualType ResultType; 1755protected: 1756 FunctionType(TypeClass tc, QualType res, bool SubclassInfo, 1757 unsigned typeQuals, QualType Canonical, bool Dependent, 1758 bool noReturn = false, CallingConv callConv = CC_Default) 1759 : Type(tc, Canonical, Dependent), 1760 SubClassData(SubclassInfo), TypeQuals(typeQuals), NoReturn(noReturn), 1761 CallConv(callConv), ResultType(res) {} 1762 bool getSubClassData() const { return SubClassData; } 1763 unsigned getTypeQuals() const { return TypeQuals; } 1764public: 1765 1766 QualType getResultType() const { return ResultType; } 1767 bool getNoReturnAttr() const { return NoReturn; } 1768 CallingConv getCallConv() const { return (CallingConv)CallConv; } 1769 1770 static llvm::StringRef getNameForCallConv(CallingConv CC); 1771 1772 static bool classof(const Type *T) { 1773 return T->getTypeClass() == FunctionNoProto || 1774 T->getTypeClass() == FunctionProto; 1775 } 1776 static bool classof(const FunctionType *) { return true; } 1777}; 1778 1779/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 1780/// no information available about its arguments. 1781class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 1782 FunctionNoProtoType(QualType Result, QualType Canonical, 1783 bool NoReturn = false, CallingConv CallConv = CC_Default) 1784 : FunctionType(FunctionNoProto, Result, false, 0, Canonical, 1785 /*Dependent=*/false, NoReturn, CallConv) {} 1786 friend class ASTContext; // ASTContext creates these. 1787public: 1788 // No additional state past what FunctionType provides. 1789 1790 bool isSugared() const { return false; } 1791 QualType desugar() const { return QualType(this, 0); } 1792 1793 void Profile(llvm::FoldingSetNodeID &ID) { 1794 Profile(ID, getResultType(), getNoReturnAttr(), getCallConv()); 1795 } 1796 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 1797 bool NoReturn, CallingConv CallConv) { 1798 ID.AddInteger(CallConv); 1799 ID.AddInteger(NoReturn); 1800 ID.AddPointer(ResultType.getAsOpaquePtr()); 1801 } 1802 1803 virtual Linkage getLinkage() const; 1804 1805 static bool classof(const Type *T) { 1806 return T->getTypeClass() == FunctionNoProto; 1807 } 1808 static bool classof(const FunctionNoProtoType *) { return true; } 1809}; 1810 1811/// FunctionProtoType - Represents a prototype with argument type info, e.g. 1812/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 1813/// arguments, not as having a single void argument. Such a type can have an 1814/// exception specification, but this specification is not part of the canonical 1815/// type. 1816class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 1817 /// hasAnyDependentType - Determine whether there are any dependent 1818 /// types within the arguments passed in. 1819 static bool hasAnyDependentType(const QualType *ArgArray, unsigned numArgs) { 1820 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 1821 if (ArgArray[Idx]->isDependentType()) 1822 return true; 1823 1824 return false; 1825 } 1826 1827 FunctionProtoType(QualType Result, const QualType *ArgArray, unsigned numArgs, 1828 bool isVariadic, unsigned typeQuals, bool hasExs, 1829 bool hasAnyExs, const QualType *ExArray, 1830 unsigned numExs, QualType Canonical, bool NoReturn, 1831 CallingConv CallConv) 1832 : FunctionType(FunctionProto, Result, isVariadic, typeQuals, Canonical, 1833 (Result->isDependentType() || 1834 hasAnyDependentType(ArgArray, numArgs)), NoReturn, 1835 CallConv), 1836 NumArgs(numArgs), NumExceptions(numExs), HasExceptionSpec(hasExs), 1837 AnyExceptionSpec(hasAnyExs) { 1838 // Fill in the trailing argument array. 1839 QualType *ArgInfo = reinterpret_cast<QualType*>(this+1); 1840 for (unsigned i = 0; i != numArgs; ++i) 1841 ArgInfo[i] = ArgArray[i]; 1842 // Fill in the exception array. 1843 QualType *Ex = ArgInfo + numArgs; 1844 for (unsigned i = 0; i != numExs; ++i) 1845 Ex[i] = ExArray[i]; 1846 } 1847 1848 /// NumArgs - The number of arguments this function has, not counting '...'. 1849 unsigned NumArgs : 20; 1850 1851 /// NumExceptions - The number of types in the exception spec, if any. 1852 unsigned NumExceptions : 10; 1853 1854 /// HasExceptionSpec - Whether this function has an exception spec at all. 1855 bool HasExceptionSpec : 1; 1856 1857 /// AnyExceptionSpec - Whether this function has a throw(...) spec. 1858 bool AnyExceptionSpec : 1; 1859 1860 /// ArgInfo - There is an variable size array after the class in memory that 1861 /// holds the argument types. 1862 1863 /// Exceptions - There is another variable size array after ArgInfo that 1864 /// holds the exception types. 1865 1866 friend class ASTContext; // ASTContext creates these. 1867 1868public: 1869 unsigned getNumArgs() const { return NumArgs; } 1870 QualType getArgType(unsigned i) const { 1871 assert(i < NumArgs && "Invalid argument number!"); 1872 return arg_type_begin()[i]; 1873 } 1874 1875 bool hasExceptionSpec() const { return HasExceptionSpec; } 1876 bool hasAnyExceptionSpec() const { return AnyExceptionSpec; } 1877 unsigned getNumExceptions() const { return NumExceptions; } 1878 QualType getExceptionType(unsigned i) const { 1879 assert(i < NumExceptions && "Invalid exception number!"); 1880 return exception_begin()[i]; 1881 } 1882 bool hasEmptyExceptionSpec() const { 1883 return hasExceptionSpec() && !hasAnyExceptionSpec() && 1884 getNumExceptions() == 0; 1885 } 1886 1887 bool isVariadic() const { return getSubClassData(); } 1888 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 1889 1890 typedef const QualType *arg_type_iterator; 1891 arg_type_iterator arg_type_begin() const { 1892 return reinterpret_cast<const QualType *>(this+1); 1893 } 1894 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 1895 1896 typedef const QualType *exception_iterator; 1897 exception_iterator exception_begin() const { 1898 // exceptions begin where arguments end 1899 return arg_type_end(); 1900 } 1901 exception_iterator exception_end() const { 1902 return exception_begin() + NumExceptions; 1903 } 1904 1905 bool isSugared() const { return false; } 1906 QualType desugar() const { return QualType(this, 0); } 1907 1908 virtual Linkage getLinkage() const; 1909 1910 static bool classof(const Type *T) { 1911 return T->getTypeClass() == FunctionProto; 1912 } 1913 static bool classof(const FunctionProtoType *) { return true; } 1914 1915 void Profile(llvm::FoldingSetNodeID &ID); 1916 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 1917 arg_type_iterator ArgTys, unsigned NumArgs, 1918 bool isVariadic, unsigned TypeQuals, 1919 bool hasExceptionSpec, bool anyExceptionSpec, 1920 unsigned NumExceptions, exception_iterator Exs, 1921 bool NoReturn, CallingConv CallConv); 1922}; 1923 1924 1925/// \brief Represents the dependent type named by a dependently-scoped 1926/// typename using declaration, e.g. 1927/// using typename Base<T>::foo; 1928/// Template instantiation turns these into the underlying type. 1929class UnresolvedUsingType : public Type { 1930 UnresolvedUsingTypenameDecl *Decl; 1931 1932 UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) 1933 : Type(UnresolvedUsing, QualType(), true), 1934 Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} 1935 friend class ASTContext; // ASTContext creates these. 1936public: 1937 1938 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 1939 1940 bool isSugared() const { return false; } 1941 QualType desugar() const { return QualType(this, 0); } 1942 1943 static bool classof(const Type *T) { 1944 return T->getTypeClass() == UnresolvedUsing; 1945 } 1946 static bool classof(const UnresolvedUsingType *) { return true; } 1947 1948 void Profile(llvm::FoldingSetNodeID &ID) { 1949 return Profile(ID, Decl); 1950 } 1951 static void Profile(llvm::FoldingSetNodeID &ID, 1952 UnresolvedUsingTypenameDecl *D) { 1953 ID.AddPointer(D); 1954 } 1955}; 1956 1957 1958class TypedefType : public Type { 1959 TypedefDecl *Decl; 1960protected: 1961 TypedefType(TypeClass tc, const TypedefDecl *D, QualType can) 1962 : Type(tc, can, can->isDependentType()), 1963 Decl(const_cast<TypedefDecl*>(D)) { 1964 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1965 } 1966 friend class ASTContext; // ASTContext creates these. 1967public: 1968 1969 TypedefDecl *getDecl() const { return Decl; } 1970 1971 /// LookThroughTypedefs - Return the ultimate type this typedef corresponds to 1972 /// potentially looking through *all* consecutive typedefs. This returns the 1973 /// sum of the type qualifiers, so if you have: 1974 /// typedef const int A; 1975 /// typedef volatile A B; 1976 /// looking through the typedefs for B will give you "const volatile A". 1977 QualType LookThroughTypedefs() const; 1978 1979 bool isSugared() const { return true; } 1980 QualType desugar() const; 1981 1982 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 1983 static bool classof(const TypedefType *) { return true; } 1984}; 1985 1986/// TypeOfExprType (GCC extension). 1987class TypeOfExprType : public Type { 1988 Expr *TOExpr; 1989 1990protected: 1991 TypeOfExprType(Expr *E, QualType can = QualType()); 1992 friend class ASTContext; // ASTContext creates these. 1993public: 1994 Expr *getUnderlyingExpr() const { return TOExpr; } 1995 1996 /// \brief Remove a single level of sugar. 1997 QualType desugar() const; 1998 1999 /// \brief Returns whether this type directly provides sugar. 2000 bool isSugared() const { return true; } 2001 2002 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 2003 static bool classof(const TypeOfExprType *) { return true; } 2004}; 2005 2006/// \brief Internal representation of canonical, dependent 2007/// typeof(expr) types. 2008/// 2009/// This class is used internally by the ASTContext to manage 2010/// canonical, dependent types, only. Clients will only see instances 2011/// of this class via TypeOfExprType nodes. 2012class DependentTypeOfExprType 2013 : public TypeOfExprType, public llvm::FoldingSetNode { 2014 ASTContext &Context; 2015 2016public: 2017 DependentTypeOfExprType(ASTContext &Context, Expr *E) 2018 : TypeOfExprType(E), Context(Context) { } 2019 2020 bool isSugared() const { return false; } 2021 QualType desugar() const { return QualType(this, 0); } 2022 2023 void Profile(llvm::FoldingSetNodeID &ID) { 2024 Profile(ID, Context, getUnderlyingExpr()); 2025 } 2026 2027 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2028 Expr *E); 2029}; 2030 2031/// TypeOfType (GCC extension). 2032class TypeOfType : public Type { 2033 QualType TOType; 2034 TypeOfType(QualType T, QualType can) 2035 : Type(TypeOf, can, T->isDependentType()), TOType(T) { 2036 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2037 } 2038 friend class ASTContext; // ASTContext creates these. 2039public: 2040 QualType getUnderlyingType() const { return TOType; } 2041 2042 /// \brief Remove a single level of sugar. 2043 QualType desugar() const { return getUnderlyingType(); } 2044 2045 /// \brief Returns whether this type directly provides sugar. 2046 bool isSugared() const { return true; } 2047 2048 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 2049 static bool classof(const TypeOfType *) { return true; } 2050}; 2051 2052/// DecltypeType (C++0x) 2053class DecltypeType : public Type { 2054 Expr *E; 2055 2056 // FIXME: We could get rid of UnderlyingType if we wanted to: We would have to 2057 // Move getDesugaredType to ASTContext so that it can call getDecltypeForExpr 2058 // from it. 2059 QualType UnderlyingType; 2060 2061protected: 2062 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 2063 friend class ASTContext; // ASTContext creates these. 2064public: 2065 Expr *getUnderlyingExpr() const { return E; } 2066 QualType getUnderlyingType() const { return UnderlyingType; } 2067 2068 /// \brief Remove a single level of sugar. 2069 QualType desugar() const { return getUnderlyingType(); } 2070 2071 /// \brief Returns whether this type directly provides sugar. 2072 bool isSugared() const { return !isDependentType(); } 2073 2074 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 2075 static bool classof(const DecltypeType *) { return true; } 2076}; 2077 2078/// \brief Internal representation of canonical, dependent 2079/// decltype(expr) types. 2080/// 2081/// This class is used internally by the ASTContext to manage 2082/// canonical, dependent types, only. Clients will only see instances 2083/// of this class via DecltypeType nodes. 2084class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 2085 ASTContext &Context; 2086 2087public: 2088 DependentDecltypeType(ASTContext &Context, Expr *E); 2089 2090 bool isSugared() const { return false; } 2091 QualType desugar() const { return QualType(this, 0); } 2092 2093 void Profile(llvm::FoldingSetNodeID &ID) { 2094 Profile(ID, Context, getUnderlyingExpr()); 2095 } 2096 2097 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2098 Expr *E); 2099}; 2100 2101class TagType : public Type { 2102 /// Stores the TagDecl associated with this type. The decl will 2103 /// point to the TagDecl that actually defines the entity (or is a 2104 /// definition in progress), if there is such a definition. The 2105 /// single-bit value will be non-zero when this tag is in the 2106 /// process of being defined. 2107 mutable llvm::PointerIntPair<TagDecl *, 1> decl; 2108 friend class ASTContext; 2109 friend class TagDecl; 2110 2111protected: 2112 TagType(TypeClass TC, const TagDecl *D, QualType can); 2113 2114public: 2115 TagDecl *getDecl() const { return decl.getPointer(); } 2116 2117 /// @brief Determines whether this type is in the process of being 2118 /// defined. 2119 bool isBeingDefined() const { return decl.getInt(); } 2120 void setBeingDefined(bool Def) const { decl.setInt(Def? 1 : 0); } 2121 2122 virtual Linkage getLinkage() const; 2123 2124 static bool classof(const Type *T) { 2125 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 2126 } 2127 static bool classof(const TagType *) { return true; } 2128 static bool classof(const RecordType *) { return true; } 2129 static bool classof(const EnumType *) { return true; } 2130}; 2131 2132/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 2133/// to detect TagType objects of structs/unions/classes. 2134class RecordType : public TagType { 2135protected: 2136 explicit RecordType(const RecordDecl *D) 2137 : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2138 explicit RecordType(TypeClass TC, RecordDecl *D) 2139 : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2140 friend class ASTContext; // ASTContext creates these. 2141public: 2142 2143 RecordDecl *getDecl() const { 2144 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 2145 } 2146 2147 // FIXME: This predicate is a helper to QualType/Type. It needs to 2148 // recursively check all fields for const-ness. If any field is declared 2149 // const, it needs to return false. 2150 bool hasConstFields() const { return false; } 2151 2152 // FIXME: RecordType needs to check when it is created that all fields are in 2153 // the same address space, and return that. 2154 unsigned getAddressSpace() const { return 0; } 2155 2156 bool isSugared() const { return false; } 2157 QualType desugar() const { return QualType(this, 0); } 2158 2159 static bool classof(const TagType *T); 2160 static bool classof(const Type *T) { 2161 return isa<TagType>(T) && classof(cast<TagType>(T)); 2162 } 2163 static bool classof(const RecordType *) { return true; } 2164}; 2165 2166/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 2167/// to detect TagType objects of enums. 2168class EnumType : public TagType { 2169 explicit EnumType(const EnumDecl *D) 2170 : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2171 friend class ASTContext; // ASTContext creates these. 2172public: 2173 2174 EnumDecl *getDecl() const { 2175 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 2176 } 2177 2178 bool isSugared() const { return false; } 2179 QualType desugar() const { return QualType(this, 0); } 2180 2181 static bool classof(const TagType *T); 2182 static bool classof(const Type *T) { 2183 return isa<TagType>(T) && classof(cast<TagType>(T)); 2184 } 2185 static bool classof(const EnumType *) { return true; } 2186}; 2187 2188/// ElaboratedType - A non-canonical type used to represents uses of 2189/// elaborated type specifiers in C++. For example: 2190/// 2191/// void foo(union MyUnion); 2192/// ^^^^^^^^^^^^^ 2193/// 2194/// At the moment, for efficiency we do not create elaborated types in 2195/// C, since outside of typedefs all references to structs would 2196/// necessarily be elaborated. 2197class ElaboratedType : public Type, public llvm::FoldingSetNode { 2198public: 2199 enum TagKind { 2200 TK_struct, 2201 TK_union, 2202 TK_class, 2203 TK_enum 2204 }; 2205 2206private: 2207 /// The tag that was used in this elaborated type specifier. 2208 TagKind Tag; 2209 2210 /// The underlying type. 2211 QualType UnderlyingType; 2212 2213 explicit ElaboratedType(QualType Ty, TagKind Tag, QualType Canon) 2214 : Type(Elaborated, Canon, Canon->isDependentType()), 2215 Tag(Tag), UnderlyingType(Ty) { } 2216 friend class ASTContext; // ASTContext creates these. 2217 2218public: 2219 TagKind getTagKind() const { return Tag; } 2220 QualType getUnderlyingType() const { return UnderlyingType; } 2221 2222 /// \brief Remove a single level of sugar. 2223 QualType desugar() const { return getUnderlyingType(); } 2224 2225 /// \brief Returns whether this type directly provides sugar. 2226 bool isSugared() const { return true; } 2227 2228 static const char *getNameForTagKind(TagKind Kind) { 2229 switch (Kind) { 2230 default: assert(0 && "Unknown TagKind!"); 2231 case TK_struct: return "struct"; 2232 case TK_union: return "union"; 2233 case TK_class: return "class"; 2234 case TK_enum: return "enum"; 2235 } 2236 } 2237 2238 void Profile(llvm::FoldingSetNodeID &ID) { 2239 Profile(ID, getUnderlyingType(), getTagKind()); 2240 } 2241 static void Profile(llvm::FoldingSetNodeID &ID, QualType T, TagKind Tag) { 2242 ID.AddPointer(T.getAsOpaquePtr()); 2243 ID.AddInteger(Tag); 2244 } 2245 2246 static bool classof(const ElaboratedType*) { return true; } 2247 static bool classof(const Type *T) { return T->getTypeClass() == Elaborated; } 2248}; 2249 2250class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2251 unsigned Depth : 15; 2252 unsigned Index : 16; 2253 unsigned ParameterPack : 1; 2254 IdentifierInfo *Name; 2255 2256 TemplateTypeParmType(unsigned D, unsigned I, bool PP, IdentifierInfo *N, 2257 QualType Canon) 2258 : Type(TemplateTypeParm, Canon, /*Dependent=*/true), 2259 Depth(D), Index(I), ParameterPack(PP), Name(N) { } 2260 2261 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 2262 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true), 2263 Depth(D), Index(I), ParameterPack(PP), Name(0) { } 2264 2265 friend class ASTContext; // ASTContext creates these 2266 2267public: 2268 unsigned getDepth() const { return Depth; } 2269 unsigned getIndex() const { return Index; } 2270 bool isParameterPack() const { return ParameterPack; } 2271 IdentifierInfo *getName() const { return Name; } 2272 2273 bool isSugared() const { return false; } 2274 QualType desugar() const { return QualType(this, 0); } 2275 2276 void Profile(llvm::FoldingSetNodeID &ID) { 2277 Profile(ID, Depth, Index, ParameterPack, Name); 2278 } 2279 2280 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 2281 unsigned Index, bool ParameterPack, 2282 IdentifierInfo *Name) { 2283 ID.AddInteger(Depth); 2284 ID.AddInteger(Index); 2285 ID.AddBoolean(ParameterPack); 2286 ID.AddPointer(Name); 2287 } 2288 2289 static bool classof(const Type *T) { 2290 return T->getTypeClass() == TemplateTypeParm; 2291 } 2292 static bool classof(const TemplateTypeParmType *T) { return true; } 2293}; 2294 2295/// \brief Represents the result of substituting a type for a template 2296/// type parameter. 2297/// 2298/// Within an instantiated template, all template type parameters have 2299/// been replaced with these. They are used solely to record that a 2300/// type was originally written as a template type parameter; 2301/// therefore they are never canonical. 2302class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2303 // The original type parameter. 2304 const TemplateTypeParmType *Replaced; 2305 2306 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 2307 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType()), 2308 Replaced(Param) { } 2309 2310 friend class ASTContext; 2311 2312public: 2313 IdentifierInfo *getName() const { return Replaced->getName(); } 2314 2315 /// Gets the template parameter that was substituted for. 2316 const TemplateTypeParmType *getReplacedParameter() const { 2317 return Replaced; 2318 } 2319 2320 /// Gets the type that was substituted for the template 2321 /// parameter. 2322 QualType getReplacementType() const { 2323 return getCanonicalTypeInternal(); 2324 } 2325 2326 bool isSugared() const { return true; } 2327 QualType desugar() const { return getReplacementType(); } 2328 2329 void Profile(llvm::FoldingSetNodeID &ID) { 2330 Profile(ID, getReplacedParameter(), getReplacementType()); 2331 } 2332 static void Profile(llvm::FoldingSetNodeID &ID, 2333 const TemplateTypeParmType *Replaced, 2334 QualType Replacement) { 2335 ID.AddPointer(Replaced); 2336 ID.AddPointer(Replacement.getAsOpaquePtr()); 2337 } 2338 2339 static bool classof(const Type *T) { 2340 return T->getTypeClass() == SubstTemplateTypeParm; 2341 } 2342 static bool classof(const SubstTemplateTypeParmType *T) { return true; } 2343}; 2344 2345/// \brief Represents the type of a template specialization as written 2346/// in the source code. 2347/// 2348/// Template specialization types represent the syntactic form of a 2349/// template-id that refers to a type, e.g., @c vector<int>. Some 2350/// template specialization types are syntactic sugar, whose canonical 2351/// type will point to some other type node that represents the 2352/// instantiation or class template specialization. For example, a 2353/// class template specialization type of @c vector<int> will refer to 2354/// a tag type for the instantiation 2355/// @c std::vector<int, std::allocator<int>>. 2356/// 2357/// Other template specialization types, for which the template name 2358/// is dependent, may be canonical types. These types are always 2359/// dependent. 2360class TemplateSpecializationType 2361 : public Type, public llvm::FoldingSetNode { 2362 2363 // FIXME: Currently needed for profiling expressions; can we avoid this? 2364 ASTContext &Context; 2365 2366 /// \brief The name of the template being specialized. 2367 TemplateName Template; 2368 2369 /// \brief - The number of template arguments named in this class 2370 /// template specialization. 2371 unsigned NumArgs; 2372 2373 TemplateSpecializationType(ASTContext &Context, 2374 TemplateName T, 2375 const TemplateArgument *Args, 2376 unsigned NumArgs, QualType Canon); 2377 2378 virtual void Destroy(ASTContext& C); 2379 2380 friend class ASTContext; // ASTContext creates these 2381 2382public: 2383 /// \brief Determine whether any of the given template arguments are 2384 /// dependent. 2385 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 2386 unsigned NumArgs); 2387 2388 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 2389 unsigned NumArgs); 2390 2391 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &); 2392 2393 /// \brief Print a template argument list, including the '<' and '>' 2394 /// enclosing the template arguments. 2395 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 2396 unsigned NumArgs, 2397 const PrintingPolicy &Policy); 2398 2399 static std::string PrintTemplateArgumentList(const TemplateArgumentLoc *Args, 2400 unsigned NumArgs, 2401 const PrintingPolicy &Policy); 2402 2403 static std::string PrintTemplateArgumentList(const TemplateArgumentListInfo &, 2404 const PrintingPolicy &Policy); 2405 2406 typedef const TemplateArgument * iterator; 2407 2408 iterator begin() const { return getArgs(); } 2409 iterator end() const; 2410 2411 /// \brief Retrieve the name of the template that we are specializing. 2412 TemplateName getTemplateName() const { return Template; } 2413 2414 /// \brief Retrieve the template arguments. 2415 const TemplateArgument *getArgs() const { 2416 return reinterpret_cast<const TemplateArgument *>(this + 1); 2417 } 2418 2419 /// \brief Retrieve the number of template arguments. 2420 unsigned getNumArgs() const { return NumArgs; } 2421 2422 /// \brief Retrieve a specific template argument as a type. 2423 /// \precondition @c isArgType(Arg) 2424 const TemplateArgument &getArg(unsigned Idx) const; 2425 2426 bool isSugared() const { return !isDependentType(); } 2427 QualType desugar() const { return getCanonicalTypeInternal(); } 2428 2429 void Profile(llvm::FoldingSetNodeID &ID) { 2430 Profile(ID, Template, getArgs(), NumArgs, Context); 2431 } 2432 2433 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 2434 const TemplateArgument *Args, unsigned NumArgs, 2435 ASTContext &Context); 2436 2437 static bool classof(const Type *T) { 2438 return T->getTypeClass() == TemplateSpecialization; 2439 } 2440 static bool classof(const TemplateSpecializationType *T) { return true; } 2441}; 2442 2443/// \brief Represents a type that was referred to via a qualified 2444/// name, e.g., N::M::type. 2445/// 2446/// This type is used to keep track of a type name as written in the 2447/// source code, including any nested-name-specifiers. The type itself 2448/// is always "sugar", used to express what was written in the source 2449/// code but containing no additional semantic information. 2450class QualifiedNameType : public Type, public llvm::FoldingSetNode { 2451 /// \brief The nested name specifier containing the qualifier. 2452 NestedNameSpecifier *NNS; 2453 2454 /// \brief The type that this qualified name refers to. 2455 QualType NamedType; 2456 2457 QualifiedNameType(NestedNameSpecifier *NNS, QualType NamedType, 2458 QualType CanonType) 2459 : Type(QualifiedName, CanonType, NamedType->isDependentType()), 2460 NNS(NNS), NamedType(NamedType) { } 2461 2462 friend class ASTContext; // ASTContext creates these 2463 2464public: 2465 /// \brief Retrieve the qualification on this type. 2466 NestedNameSpecifier *getQualifier() const { return NNS; } 2467 2468 /// \brief Retrieve the type named by the qualified-id. 2469 QualType getNamedType() const { return NamedType; } 2470 2471 /// \brief Remove a single level of sugar. 2472 QualType desugar() const { return getNamedType(); } 2473 2474 /// \brief Returns whether this type directly provides sugar. 2475 bool isSugared() const { return true; } 2476 2477 void Profile(llvm::FoldingSetNodeID &ID) { 2478 Profile(ID, NNS, NamedType); 2479 } 2480 2481 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 2482 QualType NamedType) { 2483 ID.AddPointer(NNS); 2484 NamedType.Profile(ID); 2485 } 2486 2487 static bool classof(const Type *T) { 2488 return T->getTypeClass() == QualifiedName; 2489 } 2490 static bool classof(const QualifiedNameType *T) { return true; } 2491}; 2492 2493/// \brief Represents a 'typename' specifier that names a type within 2494/// a dependent type, e.g., "typename T::type". 2495/// 2496/// TypenameType has a very similar structure to QualifiedNameType, 2497/// which also involves a nested-name-specifier following by a type, 2498/// and (FIXME!) both can even be prefixed by the 'typename' 2499/// keyword. However, the two types serve very different roles: 2500/// QualifiedNameType is a non-semantic type that serves only as sugar 2501/// to show how a particular type was written in the source 2502/// code. TypenameType, on the other hand, only occurs when the 2503/// nested-name-specifier is dependent, such that we cannot resolve 2504/// the actual type until after instantiation. 2505class TypenameType : public Type, public llvm::FoldingSetNode { 2506 /// \brief The nested name specifier containing the qualifier. 2507 NestedNameSpecifier *NNS; 2508 2509 typedef llvm::PointerUnion<const IdentifierInfo *, 2510 const TemplateSpecializationType *> NameType; 2511 2512 /// \brief The type that this typename specifier refers to. 2513 NameType Name; 2514 2515 TypenameType(NestedNameSpecifier *NNS, const IdentifierInfo *Name, 2516 QualType CanonType) 2517 : Type(Typename, CanonType, true), NNS(NNS), Name(Name) { 2518 assert(NNS->isDependent() && 2519 "TypenameType requires a dependent nested-name-specifier"); 2520 } 2521 2522 TypenameType(NestedNameSpecifier *NNS, const TemplateSpecializationType *Ty, 2523 QualType CanonType) 2524 : Type(Typename, CanonType, true), NNS(NNS), Name(Ty) { 2525 assert(NNS->isDependent() && 2526 "TypenameType requires a dependent nested-name-specifier"); 2527 } 2528 2529 friend class ASTContext; // ASTContext creates these 2530 2531public: 2532 /// \brief Retrieve the qualification on this type. 2533 NestedNameSpecifier *getQualifier() const { return NNS; } 2534 2535 /// \brief Retrieve the type named by the typename specifier as an 2536 /// identifier. 2537 /// 2538 /// This routine will return a non-NULL identifier pointer when the 2539 /// form of the original typename was terminated by an identifier, 2540 /// e.g., "typename T::type". 2541 const IdentifierInfo *getIdentifier() const { 2542 return Name.dyn_cast<const IdentifierInfo *>(); 2543 } 2544 2545 /// \brief Retrieve the type named by the typename specifier as a 2546 /// type specialization. 2547 const TemplateSpecializationType *getTemplateId() const { 2548 return Name.dyn_cast<const TemplateSpecializationType *>(); 2549 } 2550 2551 bool isSugared() const { return false; } 2552 QualType desugar() const { return QualType(this, 0); } 2553 2554 void Profile(llvm::FoldingSetNodeID &ID) { 2555 Profile(ID, NNS, Name); 2556 } 2557 2558 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 2559 NameType Name) { 2560 ID.AddPointer(NNS); 2561 ID.AddPointer(Name.getOpaqueValue()); 2562 } 2563 2564 static bool classof(const Type *T) { 2565 return T->getTypeClass() == Typename; 2566 } 2567 static bool classof(const TypenameType *T) { return true; } 2568}; 2569 2570/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 2571/// object oriented design. They basically correspond to C++ classes. There 2572/// are two kinds of interface types, normal interfaces like "NSString" and 2573/// qualified interfaces, which are qualified with a protocol list like 2574/// "NSString<NSCopyable, NSAmazing>". 2575class ObjCInterfaceType : public Type, public llvm::FoldingSetNode { 2576 ObjCInterfaceDecl *Decl; 2577 2578 /// \brief The number of protocols stored after the ObjCInterfaceType node. 2579 /// The list of protocols is sorted on protocol name. No protocol is enterred 2580 /// more than once. 2581 unsigned NumProtocols; 2582 2583 ObjCInterfaceType(QualType Canonical, ObjCInterfaceDecl *D, 2584 ObjCProtocolDecl **Protos, unsigned NumP); 2585 friend class ASTContext; // ASTContext creates these. 2586public: 2587 void Destroy(ASTContext& C); 2588 2589 ObjCInterfaceDecl *getDecl() const { return Decl; } 2590 2591 /// getNumProtocols - Return the number of qualifying protocols in this 2592 /// interface type, or 0 if there are none. 2593 unsigned getNumProtocols() const { return NumProtocols; } 2594 2595 /// \brief Retrieve the Ith protocol. 2596 ObjCProtocolDecl *getProtocol(unsigned I) const { 2597 assert(I < getNumProtocols() && "Out-of-range protocol access"); 2598 return qual_begin()[I]; 2599 } 2600 2601 /// qual_iterator and friends: this provides access to the (potentially empty) 2602 /// list of protocols qualifying this interface. 2603 typedef ObjCProtocolDecl* const * qual_iterator; 2604 qual_iterator qual_begin() const { 2605 return reinterpret_cast<qual_iterator>(this + 1); 2606 } 2607 qual_iterator qual_end() const { 2608 return qual_begin() + NumProtocols; 2609 } 2610 bool qual_empty() const { return NumProtocols == 0; } 2611 2612 bool isSugared() const { return false; } 2613 QualType desugar() const { return QualType(this, 0); } 2614 2615 void Profile(llvm::FoldingSetNodeID &ID); 2616 static void Profile(llvm::FoldingSetNodeID &ID, 2617 const ObjCInterfaceDecl *Decl, 2618 ObjCProtocolDecl * const *protocols, 2619 unsigned NumProtocols); 2620 2621 virtual Linkage getLinkage() const; 2622 2623 static bool classof(const Type *T) { 2624 return T->getTypeClass() == ObjCInterface; 2625 } 2626 static bool classof(const ObjCInterfaceType *) { return true; } 2627}; 2628 2629/// ObjCObjectPointerType - Used to represent 'id', 'Interface *', 'id <p>', 2630/// and 'Interface <p> *'. 2631/// 2632/// Duplicate protocols are removed and protocol list is canonicalized to be in 2633/// alphabetical order. 2634class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 2635 QualType PointeeType; // A builtin or interface type. 2636 2637 /// \brief The number of protocols stored after the ObjCObjectPointerType 2638 /// node. 2639 /// 2640 /// The list of protocols is sorted on protocol name. No protocol is enterred 2641 /// more than once. 2642 unsigned NumProtocols; 2643 2644 ObjCObjectPointerType(QualType Canonical, QualType T, 2645 ObjCProtocolDecl **Protos, unsigned NumP); 2646 friend class ASTContext; // ASTContext creates these. 2647 2648public: 2649 void Destroy(ASTContext& C); 2650 2651 // Get the pointee type. Pointee will either be: 2652 // - a built-in type (for 'id' and 'Class'). 2653 // - an interface type (for user-defined types). 2654 // - a TypedefType whose canonical type is an interface (as in 'T' below). 2655 // For example: typedef NSObject T; T *var; 2656 QualType getPointeeType() const { return PointeeType; } 2657 2658 const ObjCInterfaceType *getInterfaceType() const { 2659 return PointeeType->getAs<ObjCInterfaceType>(); 2660 } 2661 /// getInterfaceDecl - returns an interface decl for user-defined types. 2662 ObjCInterfaceDecl *getInterfaceDecl() const { 2663 return getInterfaceType() ? getInterfaceType()->getDecl() : 0; 2664 } 2665 /// isObjCIdType - true for "id". 2666 bool isObjCIdType() const { 2667 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCId) && 2668 !NumProtocols; 2669 } 2670 /// isObjCClassType - true for "Class". 2671 bool isObjCClassType() const { 2672 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCClass) && 2673 !NumProtocols; 2674 } 2675 2676 /// isObjCQualifiedIdType - true for "id <p>". 2677 bool isObjCQualifiedIdType() const { 2678 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCId) && 2679 NumProtocols; 2680 } 2681 /// isObjCQualifiedClassType - true for "Class <p>". 2682 bool isObjCQualifiedClassType() const { 2683 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCClass) && 2684 NumProtocols; 2685 } 2686 /// qual_iterator and friends: this provides access to the (potentially empty) 2687 /// list of protocols qualifying this interface. 2688 typedef ObjCProtocolDecl* const * qual_iterator; 2689 2690 qual_iterator qual_begin() const { 2691 return reinterpret_cast<qual_iterator> (this + 1); 2692 } 2693 qual_iterator qual_end() const { 2694 return qual_begin() + NumProtocols; 2695 } 2696 bool qual_empty() const { return NumProtocols == 0; } 2697 2698 /// getNumProtocols - Return the number of qualifying protocols in this 2699 /// interface type, or 0 if there are none. 2700 unsigned getNumProtocols() const { return NumProtocols; } 2701 2702 /// \brief Retrieve the Ith protocol. 2703 ObjCProtocolDecl *getProtocol(unsigned I) const { 2704 assert(I < getNumProtocols() && "Out-of-range protocol access"); 2705 return qual_begin()[I]; 2706 } 2707 2708 bool isSugared() const { return false; } 2709 QualType desugar() const { return QualType(this, 0); } 2710 2711 virtual Linkage getLinkage() const; 2712 2713 void Profile(llvm::FoldingSetNodeID &ID); 2714 static void Profile(llvm::FoldingSetNodeID &ID, QualType T, 2715 ObjCProtocolDecl *const *protocols, 2716 unsigned NumProtocols); 2717 static bool classof(const Type *T) { 2718 return T->getTypeClass() == ObjCObjectPointer; 2719 } 2720 static bool classof(const ObjCObjectPointerType *) { return true; } 2721}; 2722 2723/// A qualifier set is used to build a set of qualifiers. 2724class QualifierCollector : public Qualifiers { 2725 ASTContext *Context; 2726 2727public: 2728 QualifierCollector(Qualifiers Qs = Qualifiers()) 2729 : Qualifiers(Qs), Context(0) {} 2730 QualifierCollector(ASTContext &Context, Qualifiers Qs = Qualifiers()) 2731 : Qualifiers(Qs), Context(&Context) {} 2732 2733 void setContext(ASTContext &C) { Context = &C; } 2734 2735 /// Collect any qualifiers on the given type and return an 2736 /// unqualified type. 2737 const Type *strip(QualType QT) { 2738 addFastQualifiers(QT.getLocalFastQualifiers()); 2739 if (QT.hasLocalNonFastQualifiers()) { 2740 const ExtQuals *EQ = QT.getExtQualsUnsafe(); 2741 Context = &EQ->getContext(); 2742 addQualifiers(EQ->getQualifiers()); 2743 return EQ->getBaseType(); 2744 } 2745 return QT.getTypePtrUnsafe(); 2746 } 2747 2748 /// Apply the collected qualifiers to the given type. 2749 QualType apply(QualType QT) const; 2750 2751 /// Apply the collected qualifiers to the given type. 2752 QualType apply(const Type* T) const; 2753 2754}; 2755 2756 2757// Inline function definitions. 2758 2759inline bool QualType::isCanonical() const { 2760 const Type *T = getTypePtr(); 2761 if (hasLocalQualifiers()) 2762 return T->isCanonicalUnqualified() && !isa<ArrayType>(T); 2763 return T->isCanonicalUnqualified(); 2764} 2765 2766inline bool QualType::isCanonicalAsParam() const { 2767 if (hasLocalQualifiers()) return false; 2768 const Type *T = getTypePtr(); 2769 return T->isCanonicalUnqualified() && 2770 !isa<FunctionType>(T) && !isa<ArrayType>(T); 2771} 2772 2773inline bool QualType::isConstQualified() const { 2774 return isLocalConstQualified() || 2775 getTypePtr()->getCanonicalTypeInternal().isLocalConstQualified(); 2776} 2777 2778inline bool QualType::isRestrictQualified() const { 2779 return isLocalRestrictQualified() || 2780 getTypePtr()->getCanonicalTypeInternal().isLocalRestrictQualified(); 2781} 2782 2783 2784inline bool QualType::isVolatileQualified() const { 2785 return isLocalVolatileQualified() || 2786 getTypePtr()->getCanonicalTypeInternal().isLocalVolatileQualified(); 2787} 2788 2789inline bool QualType::hasQualifiers() const { 2790 return hasLocalQualifiers() || 2791 getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers(); 2792} 2793 2794inline Qualifiers QualType::getQualifiers() const { 2795 Qualifiers Quals = getLocalQualifiers(); 2796 Quals.addQualifiers( 2797 getTypePtr()->getCanonicalTypeInternal().getLocalQualifiers()); 2798 return Quals; 2799} 2800 2801inline unsigned QualType::getCVRQualifiers() const { 2802 return getLocalCVRQualifiers() | 2803 getTypePtr()->getCanonicalTypeInternal().getLocalCVRQualifiers(); 2804} 2805 2806/// getCVRQualifiersThroughArrayTypes - If there are CVR qualifiers for this 2807/// type, returns them. Otherwise, if this is an array type, recurses 2808/// on the element type until some qualifiers have been found or a non-array 2809/// type reached. 2810inline unsigned QualType::getCVRQualifiersThroughArrayTypes() const { 2811 if (unsigned Quals = getCVRQualifiers()) 2812 return Quals; 2813 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2814 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 2815 return AT->getElementType().getCVRQualifiersThroughArrayTypes(); 2816 return 0; 2817} 2818 2819inline void QualType::removeConst() { 2820 removeFastQualifiers(Qualifiers::Const); 2821} 2822 2823inline void QualType::removeRestrict() { 2824 removeFastQualifiers(Qualifiers::Restrict); 2825} 2826 2827inline void QualType::removeVolatile() { 2828 QualifierCollector Qc; 2829 const Type *Ty = Qc.strip(*this); 2830 if (Qc.hasVolatile()) { 2831 Qc.removeVolatile(); 2832 *this = Qc.apply(Ty); 2833 } 2834} 2835 2836inline void QualType::removeCVRQualifiers(unsigned Mask) { 2837 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 2838 2839 // Fast path: we don't need to touch the slow qualifiers. 2840 if (!(Mask & ~Qualifiers::FastMask)) { 2841 removeFastQualifiers(Mask); 2842 return; 2843 } 2844 2845 QualifierCollector Qc; 2846 const Type *Ty = Qc.strip(*this); 2847 Qc.removeCVRQualifiers(Mask); 2848 *this = Qc.apply(Ty); 2849} 2850 2851/// getAddressSpace - Return the address space of this type. 2852inline unsigned QualType::getAddressSpace() const { 2853 if (hasLocalNonFastQualifiers()) { 2854 const ExtQuals *EQ = getExtQualsUnsafe(); 2855 if (EQ->hasAddressSpace()) 2856 return EQ->getAddressSpace(); 2857 } 2858 2859 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2860 if (CT.hasLocalNonFastQualifiers()) { 2861 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 2862 if (EQ->hasAddressSpace()) 2863 return EQ->getAddressSpace(); 2864 } 2865 2866 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 2867 return AT->getElementType().getAddressSpace(); 2868 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 2869 return RT->getAddressSpace(); 2870 return 0; 2871} 2872 2873/// getObjCGCAttr - Return the gc attribute of this type. 2874inline Qualifiers::GC QualType::getObjCGCAttr() const { 2875 if (hasLocalNonFastQualifiers()) { 2876 const ExtQuals *EQ = getExtQualsUnsafe(); 2877 if (EQ->hasObjCGCAttr()) 2878 return EQ->getObjCGCAttr(); 2879 } 2880 2881 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2882 if (CT.hasLocalNonFastQualifiers()) { 2883 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 2884 if (EQ->hasObjCGCAttr()) 2885 return EQ->getObjCGCAttr(); 2886 } 2887 2888 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 2889 return AT->getElementType().getObjCGCAttr(); 2890 if (const ObjCObjectPointerType *PT = CT->getAs<ObjCObjectPointerType>()) 2891 return PT->getPointeeType().getObjCGCAttr(); 2892 // We most look at all pointer types, not just pointer to interface types. 2893 if (const PointerType *PT = CT->getAs<PointerType>()) 2894 return PT->getPointeeType().getObjCGCAttr(); 2895 return Qualifiers::GCNone; 2896} 2897 2898 /// getNoReturnAttr - Returns true if the type has the noreturn attribute, 2899 /// false otherwise. 2900inline bool QualType::getNoReturnAttr() const { 2901 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2902 if (const PointerType *PT = getTypePtr()->getAs<PointerType>()) { 2903 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 2904 return FT->getNoReturnAttr(); 2905 } else if (const FunctionType *FT = getTypePtr()->getAs<FunctionType>()) 2906 return FT->getNoReturnAttr(); 2907 2908 return false; 2909} 2910 2911/// getCallConv - Returns the calling convention of the type if the type 2912/// is a function type, CC_Default otherwise. 2913inline CallingConv QualType::getCallConv() const { 2914 if (const PointerType *PT = getTypePtr()->getAs<PointerType>()) 2915 return PT->getPointeeType().getCallConv(); 2916 else if (const ReferenceType *RT = getTypePtr()->getAs<ReferenceType>()) 2917 return RT->getPointeeType().getCallConv(); 2918 else if (const MemberPointerType *MPT = 2919 getTypePtr()->getAs<MemberPointerType>()) 2920 return MPT->getPointeeType().getCallConv(); 2921 else if (const BlockPointerType *BPT = 2922 getTypePtr()->getAs<BlockPointerType>()) { 2923 if (const FunctionType *FT = BPT->getPointeeType()->getAs<FunctionType>()) 2924 return FT->getCallConv(); 2925 } else if (const FunctionType *FT = getTypePtr()->getAs<FunctionType>()) 2926 return FT->getCallConv(); 2927 2928 return CC_Default; 2929} 2930 2931/// isMoreQualifiedThan - Determine whether this type is more 2932/// qualified than the Other type. For example, "const volatile int" 2933/// is more qualified than "const int", "volatile int", and 2934/// "int". However, it is not more qualified than "const volatile 2935/// int". 2936inline bool QualType::isMoreQualifiedThan(QualType Other) const { 2937 // FIXME: work on arbitrary qualifiers 2938 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 2939 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 2940 if (getAddressSpace() != Other.getAddressSpace()) 2941 return false; 2942 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 2943} 2944 2945/// isAtLeastAsQualifiedAs - Determine whether this type is at last 2946/// as qualified as the Other type. For example, "const volatile 2947/// int" is at least as qualified as "const int", "volatile int", 2948/// "int", and "const volatile int". 2949inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 2950 // FIXME: work on arbitrary qualifiers 2951 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 2952 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 2953 if (getAddressSpace() != Other.getAddressSpace()) 2954 return false; 2955 return (MyQuals | OtherQuals) == MyQuals; 2956} 2957 2958/// getNonReferenceType - If Type is a reference type (e.g., const 2959/// int&), returns the type that the reference refers to ("const 2960/// int"). Otherwise, returns the type itself. This routine is used 2961/// throughout Sema to implement C++ 5p6: 2962/// 2963/// If an expression initially has the type "reference to T" (8.3.2, 2964/// 8.5.3), the type is adjusted to "T" prior to any further 2965/// analysis, the expression designates the object or function 2966/// denoted by the reference, and the expression is an lvalue. 2967inline QualType QualType::getNonReferenceType() const { 2968 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 2969 return RefType->getPointeeType(); 2970 else 2971 return *this; 2972} 2973 2974inline const ObjCInterfaceType *Type::getAsPointerToObjCInterfaceType() const { 2975 if (const PointerType *PT = getAs<PointerType>()) 2976 return PT->getPointeeType()->getAs<ObjCInterfaceType>(); 2977 return 0; 2978} 2979 2980inline bool Type::isFunctionType() const { 2981 return isa<FunctionType>(CanonicalType); 2982} 2983inline bool Type::isPointerType() const { 2984 return isa<PointerType>(CanonicalType); 2985} 2986inline bool Type::isAnyPointerType() const { 2987 return isPointerType() || isObjCObjectPointerType(); 2988} 2989inline bool Type::isBlockPointerType() const { 2990 return isa<BlockPointerType>(CanonicalType); 2991} 2992inline bool Type::isReferenceType() const { 2993 return isa<ReferenceType>(CanonicalType); 2994} 2995inline bool Type::isLValueReferenceType() const { 2996 return isa<LValueReferenceType>(CanonicalType); 2997} 2998inline bool Type::isRValueReferenceType() const { 2999 return isa<RValueReferenceType>(CanonicalType); 3000} 3001inline bool Type::isFunctionPointerType() const { 3002 if (const PointerType* T = getAs<PointerType>()) 3003 return T->getPointeeType()->isFunctionType(); 3004 else 3005 return false; 3006} 3007inline bool Type::isMemberPointerType() const { 3008 return isa<MemberPointerType>(CanonicalType); 3009} 3010inline bool Type::isMemberFunctionPointerType() const { 3011 if (const MemberPointerType* T = getAs<MemberPointerType>()) 3012 return T->getPointeeType()->isFunctionType(); 3013 else 3014 return false; 3015} 3016inline bool Type::isArrayType() const { 3017 return isa<ArrayType>(CanonicalType); 3018} 3019inline bool Type::isConstantArrayType() const { 3020 return isa<ConstantArrayType>(CanonicalType); 3021} 3022inline bool Type::isIncompleteArrayType() const { 3023 return isa<IncompleteArrayType>(CanonicalType); 3024} 3025inline bool Type::isVariableArrayType() const { 3026 return isa<VariableArrayType>(CanonicalType); 3027} 3028inline bool Type::isDependentSizedArrayType() const { 3029 return isa<DependentSizedArrayType>(CanonicalType); 3030} 3031inline bool Type::isRecordType() const { 3032 return isa<RecordType>(CanonicalType); 3033} 3034inline bool Type::isAnyComplexType() const { 3035 return isa<ComplexType>(CanonicalType); 3036} 3037inline bool Type::isVectorType() const { 3038 return isa<VectorType>(CanonicalType); 3039} 3040inline bool Type::isExtVectorType() const { 3041 return isa<ExtVectorType>(CanonicalType); 3042} 3043inline bool Type::isObjCObjectPointerType() const { 3044 return isa<ObjCObjectPointerType>(CanonicalType); 3045} 3046inline bool Type::isObjCInterfaceType() const { 3047 return isa<ObjCInterfaceType>(CanonicalType); 3048} 3049inline bool Type::isObjCQualifiedIdType() const { 3050 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3051 return OPT->isObjCQualifiedIdType(); 3052 return false; 3053} 3054inline bool Type::isObjCQualifiedClassType() const { 3055 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3056 return OPT->isObjCQualifiedClassType(); 3057 return false; 3058} 3059inline bool Type::isObjCIdType() const { 3060 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3061 return OPT->isObjCIdType(); 3062 return false; 3063} 3064inline bool Type::isObjCClassType() const { 3065 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3066 return OPT->isObjCClassType(); 3067 return false; 3068} 3069inline bool Type::isObjCSelType() const { 3070 if (const PointerType *OPT = getAs<PointerType>()) 3071 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 3072 return false; 3073} 3074inline bool Type::isObjCBuiltinType() const { 3075 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 3076} 3077inline bool Type::isTemplateTypeParmType() const { 3078 return isa<TemplateTypeParmType>(CanonicalType); 3079} 3080 3081inline bool Type::isSpecificBuiltinType(unsigned K) const { 3082 if (const BuiltinType *BT = getAs<BuiltinType>()) 3083 if (BT->getKind() == (BuiltinType::Kind) K) 3084 return true; 3085 return false; 3086} 3087 3088/// \brief Determines whether this is a type for which one can define 3089/// an overloaded operator. 3090inline bool Type::isOverloadableType() const { 3091 return isDependentType() || isRecordType() || isEnumeralType(); 3092} 3093 3094inline bool Type::hasPointerRepresentation() const { 3095 return (isPointerType() || isReferenceType() || isBlockPointerType() || 3096 isObjCInterfaceType() || isObjCObjectPointerType() || 3097 isObjCQualifiedInterfaceType() || isNullPtrType()); 3098} 3099 3100inline bool Type::hasObjCPointerRepresentation() const { 3101 return (isObjCInterfaceType() || isObjCObjectPointerType() || 3102 isObjCQualifiedInterfaceType()); 3103} 3104 3105/// Insertion operator for diagnostics. This allows sending QualType's into a 3106/// diagnostic with <<. 3107inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 3108 QualType T) { 3109 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 3110 Diagnostic::ak_qualtype); 3111 return DB; 3112} 3113 3114// Helper class template that is used by Type::getAs to ensure that one does 3115// not try to look through a qualified type to get to an array type. 3116template<typename T, 3117 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 3118 llvm::is_base_of<ArrayType, T>::value)> 3119struct ArrayType_cannot_be_used_with_getAs { }; 3120 3121template<typename T> 3122struct ArrayType_cannot_be_used_with_getAs<T, true>; 3123 3124/// Member-template getAs<specific type>'. 3125template <typename T> const T *Type::getAs() const { 3126 ArrayType_cannot_be_used_with_getAs<T> at; 3127 (void)at; 3128 3129 // If this is directly a T type, return it. 3130 if (const T *Ty = dyn_cast<T>(this)) 3131 return Ty; 3132 3133 // If the canonical form of this type isn't the right kind, reject it. 3134 if (!isa<T>(CanonicalType)) 3135 return 0; 3136 3137 // If this is a typedef for the type, strip the typedef off without 3138 // losing all typedef information. 3139 return cast<T>(getUnqualifiedDesugaredType()); 3140} 3141 3142} // end namespace clang 3143 3144#endif 3145