Type.h revision b93a009003f19418ef0ef0d8a42a3895562c7391
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 QualifiedNameType; 94 struct PrintingPolicy; 95 96 // Provide forward declarations for all of the *Type classes 97#define TYPE(Class, Base) class Class##Type; 98#include "clang/AST/TypeNodes.def" 99 100/// Qualifiers - The collection of all-type qualifiers we support. 101/// Clang supports five independent qualifiers: 102/// * C99: const, volatile, and restrict 103/// * Embedded C (TR18037): address spaces 104/// * Objective C: the GC attributes (none, weak, or strong) 105class Qualifiers { 106public: 107 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 108 Const = 0x1, 109 Restrict = 0x2, 110 Volatile = 0x4, 111 CVRMask = Const | Volatile | Restrict 112 }; 113 114 enum GC { 115 GCNone = 0, 116 Weak, 117 Strong 118 }; 119 120 enum { 121 /// The maximum supported address space number. 122 /// 24 bits should be enough for anyone. 123 MaxAddressSpace = 0xffffffu, 124 125 /// The width of the "fast" qualifier mask. 126 FastWidth = 2, 127 128 /// The fast qualifier mask. 129 FastMask = (1 << FastWidth) - 1 130 }; 131 132 Qualifiers() : Mask(0) {} 133 134 static Qualifiers fromFastMask(unsigned Mask) { 135 Qualifiers Qs; 136 Qs.addFastQualifiers(Mask); 137 return Qs; 138 } 139 140 static Qualifiers fromCVRMask(unsigned CVR) { 141 Qualifiers Qs; 142 Qs.addCVRQualifiers(CVR); 143 return Qs; 144 } 145 146 // Deserialize qualifiers from an opaque representation. 147 static Qualifiers fromOpaqueValue(unsigned opaque) { 148 Qualifiers Qs; 149 Qs.Mask = opaque; 150 return Qs; 151 } 152 153 // Serialize these qualifiers into an opaque representation. 154 unsigned getAsOpaqueValue() const { 155 return Mask; 156 } 157 158 bool hasConst() const { return Mask & Const; } 159 void setConst(bool flag) { 160 Mask = (Mask & ~Const) | (flag ? Const : 0); 161 } 162 void removeConst() { Mask &= ~Const; } 163 void addConst() { Mask |= Const; } 164 165 bool hasVolatile() const { return Mask & Volatile; } 166 void setVolatile(bool flag) { 167 Mask = (Mask & ~Volatile) | (flag ? Volatile : 0); 168 } 169 void removeVolatile() { Mask &= ~Volatile; } 170 void addVolatile() { Mask |= Volatile; } 171 172 bool hasRestrict() const { return Mask & Restrict; } 173 void setRestrict(bool flag) { 174 Mask = (Mask & ~Restrict) | (flag ? Restrict : 0); 175 } 176 void removeRestrict() { Mask &= ~Restrict; } 177 void addRestrict() { Mask |= Restrict; } 178 179 bool hasCVRQualifiers() const { return getCVRQualifiers(); } 180 unsigned getCVRQualifiers() const { return Mask & CVRMask; } 181 void setCVRQualifiers(unsigned mask) { 182 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 183 Mask = (Mask & ~CVRMask) | mask; 184 } 185 void removeCVRQualifiers(unsigned mask) { 186 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 187 Mask &= ~mask; 188 } 189 void removeCVRQualifiers() { 190 removeCVRQualifiers(CVRMask); 191 } 192 void addCVRQualifiers(unsigned mask) { 193 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 194 Mask |= mask; 195 } 196 197 bool hasObjCGCAttr() const { return Mask & GCAttrMask; } 198 GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); } 199 void setObjCGCAttr(GC type) { 200 Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift); 201 } 202 void removeObjCGCAttr() { setObjCGCAttr(GCNone); } 203 void addObjCGCAttr(GC type) { 204 assert(type); 205 setObjCGCAttr(type); 206 } 207 208 bool hasAddressSpace() const { return Mask & AddressSpaceMask; } 209 unsigned getAddressSpace() const { return Mask >> AddressSpaceShift; } 210 void setAddressSpace(unsigned space) { 211 assert(space <= MaxAddressSpace); 212 Mask = (Mask & ~AddressSpaceMask) 213 | (((uint32_t) space) << AddressSpaceShift); 214 } 215 void removeAddressSpace() { setAddressSpace(0); } 216 void addAddressSpace(unsigned space) { 217 assert(space); 218 setAddressSpace(space); 219 } 220 221 // Fast qualifiers are those that can be allocated directly 222 // on a QualType object. 223 bool hasFastQualifiers() const { return getFastQualifiers(); } 224 unsigned getFastQualifiers() const { return Mask & FastMask; } 225 void setFastQualifiers(unsigned mask) { 226 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 227 Mask = (Mask & ~FastMask) | mask; 228 } 229 void removeFastQualifiers(unsigned mask) { 230 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 231 Mask &= ~mask; 232 } 233 void removeFastQualifiers() { 234 removeFastQualifiers(FastMask); 235 } 236 void addFastQualifiers(unsigned mask) { 237 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 238 Mask |= mask; 239 } 240 241 /// hasNonFastQualifiers - Return true if the set contains any 242 /// qualifiers which require an ExtQuals node to be allocated. 243 bool hasNonFastQualifiers() const { return Mask & ~FastMask; } 244 Qualifiers getNonFastQualifiers() const { 245 Qualifiers Quals = *this; 246 Quals.setFastQualifiers(0); 247 return Quals; 248 } 249 250 /// hasQualifiers - Return true if the set contains any qualifiers. 251 bool hasQualifiers() const { return Mask; } 252 bool empty() const { return !Mask; } 253 254 /// \brief Add the qualifiers from the given set to this set. 255 void addQualifiers(Qualifiers Q) { 256 // If the other set doesn't have any non-boolean qualifiers, just 257 // bit-or it in. 258 if (!(Q.Mask & ~CVRMask)) 259 Mask |= Q.Mask; 260 else { 261 Mask |= (Q.Mask & CVRMask); 262 if (Q.hasAddressSpace()) 263 addAddressSpace(Q.getAddressSpace()); 264 if (Q.hasObjCGCAttr()) 265 addObjCGCAttr(Q.getObjCGCAttr()); 266 } 267 } 268 269 bool operator==(Qualifiers Other) const { return Mask == Other.Mask; } 270 bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; } 271 272 operator bool() const { return hasQualifiers(); } 273 274 Qualifiers &operator+=(Qualifiers R) { 275 addQualifiers(R); 276 return *this; 277 } 278 279 // Union two qualifier sets. If an enumerated qualifier appears 280 // in both sets, use the one from the right. 281 friend Qualifiers operator+(Qualifiers L, Qualifiers R) { 282 L += R; 283 return L; 284 } 285 286 std::string getAsString() const; 287 std::string getAsString(const PrintingPolicy &Policy) const { 288 std::string Buffer; 289 getAsStringInternal(Buffer, Policy); 290 return Buffer; 291 } 292 void getAsStringInternal(std::string &S, const PrintingPolicy &Policy) const; 293 294 void Profile(llvm::FoldingSetNodeID &ID) const { 295 ID.AddInteger(Mask); 296 } 297 298private: 299 300 // bits: |0 1 2|3 .. 4|5 .. 31| 301 // |C R V|GCAttr|AddrSpace| 302 uint32_t Mask; 303 304 static const uint32_t GCAttrMask = 0x18; 305 static const uint32_t GCAttrShift = 3; 306 static const uint32_t AddressSpaceMask = ~(CVRMask | GCAttrMask); 307 static const uint32_t AddressSpaceShift = 5; 308}; 309 310 311/// ExtQuals - We can encode up to three bits in the low bits of a 312/// type pointer, but there are many more type qualifiers that we want 313/// to be able to apply to an arbitrary type. Therefore we have this 314/// struct, intended to be heap-allocated and used by QualType to 315/// store qualifiers. 316/// 317/// The current design tags the 'const' and 'restrict' qualifiers in 318/// two low bits on the QualType pointer; a third bit records whether 319/// the pointer is an ExtQuals node. 'const' was chosen because it is 320/// orders of magnitude more common than the other two qualifiers, in 321/// both library and user code. It's relatively rare to see 322/// 'restrict' in user code, but many standard C headers are saturated 323/// with 'restrict' declarations, so that representing them efficiently 324/// is a critical goal of this representation. 325class ExtQuals : public llvm::FoldingSetNode { 326 // NOTE: changing the fast qualifiers should be straightforward as 327 // long as you don't make 'const' non-fast. 328 // 1. Qualifiers: 329 // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). 330 // Fast qualifiers must occupy the low-order bits. 331 // b) Update Qualifiers::FastWidth and FastMask. 332 // 2. QualType: 333 // a) Update is{Volatile,Restrict}Qualified(), defined inline. 334 // b) Update remove{Volatile,Restrict}, defined near the end of 335 // this header. 336 // 3. ASTContext: 337 // a) Update get{Volatile,Restrict}Type. 338 339 /// Context - the context to which this set belongs. We save this 340 /// here so that QualifierCollector can use it to reapply extended 341 /// qualifiers to an arbitrary type without requiring a context to 342 /// be pushed through every single API dealing with qualifiers. 343 ASTContext& Context; 344 345 /// BaseType - the underlying type that this qualifies 346 const Type *BaseType; 347 348 /// Quals - the immutable set of qualifiers applied by this 349 /// node; always contains extended qualifiers. 350 Qualifiers Quals; 351 352public: 353 ExtQuals(ASTContext& Context, const Type *Base, Qualifiers Quals) 354 : Context(Context), BaseType(Base), Quals(Quals) 355 { 356 assert(Quals.hasNonFastQualifiers() 357 && "ExtQuals created with no fast qualifiers"); 358 assert(!Quals.hasFastQualifiers() 359 && "ExtQuals created with fast qualifiers"); 360 } 361 362 Qualifiers getQualifiers() const { return Quals; } 363 364 bool hasVolatile() const { return Quals.hasVolatile(); } 365 366 bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } 367 Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } 368 369 bool hasAddressSpace() const { return Quals.hasAddressSpace(); } 370 unsigned getAddressSpace() const { return Quals.getAddressSpace(); } 371 372 const Type *getBaseType() const { return BaseType; } 373 374 ASTContext &getContext() const { return Context; } 375 376public: 377 void Profile(llvm::FoldingSetNodeID &ID) const { 378 Profile(ID, getBaseType(), Quals); 379 } 380 static void Profile(llvm::FoldingSetNodeID &ID, 381 const Type *BaseType, 382 Qualifiers Quals) { 383 assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!"); 384 ID.AddPointer(BaseType); 385 Quals.Profile(ID); 386 } 387}; 388 389/// CallingConv - Specifies the calling convention that a function uses. 390enum CallingConv { 391 CC_Default, 392 CC_C, // __attribute__((cdecl)) 393 CC_X86StdCall, // __attribute__((stdcall)) 394 CC_X86FastCall // __attribute__((fastcall)) 395}; 396 397 398/// QualType - For efficiency, we don't store CV-qualified types as nodes on 399/// their own: instead each reference to a type stores the qualifiers. This 400/// greatly reduces the number of nodes we need to allocate for types (for 401/// example we only need one for 'int', 'const int', 'volatile int', 402/// 'const volatile int', etc). 403/// 404/// As an added efficiency bonus, instead of making this a pair, we 405/// just store the two bits we care about in the low bits of the 406/// pointer. To handle the packing/unpacking, we make QualType be a 407/// simple wrapper class that acts like a smart pointer. A third bit 408/// indicates whether there are extended qualifiers present, in which 409/// case the pointer points to a special structure. 410class QualType { 411 // Thankfully, these are efficiently composable. 412 llvm::PointerIntPair<llvm::PointerUnion<const Type*,const ExtQuals*>, 413 Qualifiers::FastWidth> Value; 414 415 const ExtQuals *getExtQualsUnsafe() const { 416 return Value.getPointer().get<const ExtQuals*>(); 417 } 418 419 const Type *getTypePtrUnsafe() const { 420 return Value.getPointer().get<const Type*>(); 421 } 422 423 QualType getUnqualifiedTypeSlow() const; 424 425 friend class QualifierCollector; 426public: 427 QualType() {} 428 429 QualType(const Type *Ptr, unsigned Quals) 430 : Value(Ptr, Quals) {} 431 QualType(const ExtQuals *Ptr, unsigned Quals) 432 : Value(Ptr, Quals) {} 433 434 unsigned getLocalFastQualifiers() const { return Value.getInt(); } 435 void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); } 436 437 /// Retrieves a pointer to the underlying (unqualified) type. 438 /// This should really return a const Type, but it's not worth 439 /// changing all the users right now. 440 Type *getTypePtr() const { 441 if (hasLocalNonFastQualifiers()) 442 return const_cast<Type*>(getExtQualsUnsafe()->getBaseType()); 443 return const_cast<Type*>(getTypePtrUnsafe()); 444 } 445 446 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 447 static QualType getFromOpaquePtr(void *Ptr) { 448 QualType T; 449 T.Value.setFromOpaqueValue(Ptr); 450 return T; 451 } 452 453 Type &operator*() const { 454 return *getTypePtr(); 455 } 456 457 Type *operator->() const { 458 return getTypePtr(); 459 } 460 461 bool isCanonical() const; 462 bool isCanonicalAsParam() const; 463 464 /// isNull - Return true if this QualType doesn't point to a type yet. 465 bool isNull() const { 466 return Value.getPointer().isNull(); 467 } 468 469 /// \brief Determine whether this particular QualType instance has the 470 /// "const" qualifier set, without looking through typedefs that may have 471 /// added "const" at a different level. 472 bool isLocalConstQualified() const { 473 return (getLocalFastQualifiers() & Qualifiers::Const); 474 } 475 476 /// \brief Determine whether this type is const-qualified. 477 bool isConstQualified() const; 478 479 /// \brief Determine whether this particular QualType instance has the 480 /// "restrict" qualifier set, without looking through typedefs that may have 481 /// added "restrict" at a different level. 482 bool isLocalRestrictQualified() const { 483 return (getLocalFastQualifiers() & Qualifiers::Restrict); 484 } 485 486 /// \brief Determine whether this type is restrict-qualified. 487 bool isRestrictQualified() const; 488 489 /// \brief Determine whether this particular QualType instance has the 490 /// "volatile" qualifier set, without looking through typedefs that may have 491 /// added "volatile" at a different level. 492 bool isLocalVolatileQualified() const { 493 return (hasLocalNonFastQualifiers() && getExtQualsUnsafe()->hasVolatile()); 494 } 495 496 /// \brief Determine whether this type is volatile-qualified. 497 bool isVolatileQualified() const; 498 499 /// \brief Determine whether this particular QualType instance has any 500 /// qualifiers, without looking through any typedefs that might add 501 /// qualifiers at a different level. 502 bool hasLocalQualifiers() const { 503 return getLocalFastQualifiers() || hasLocalNonFastQualifiers(); 504 } 505 506 /// \brief Determine whether this type has any qualifiers. 507 bool hasQualifiers() const; 508 509 /// \brief Determine whether this particular QualType instance has any 510 /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType 511 /// instance. 512 bool hasLocalNonFastQualifiers() const { 513 return Value.getPointer().is<const ExtQuals*>(); 514 } 515 516 /// \brief Retrieve the set of qualifiers local to this particular QualType 517 /// instance, not including any qualifiers acquired through typedefs or 518 /// other sugar. 519 Qualifiers getLocalQualifiers() const { 520 Qualifiers Quals; 521 if (hasLocalNonFastQualifiers()) 522 Quals = getExtQualsUnsafe()->getQualifiers(); 523 Quals.addFastQualifiers(getLocalFastQualifiers()); 524 return Quals; 525 } 526 527 /// \brief Retrieve the set of qualifiers applied to this type. 528 Qualifiers getQualifiers() const; 529 530 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 531 /// local to this particular QualType instance, not including any qualifiers 532 /// acquired through typedefs or other sugar. 533 unsigned getLocalCVRQualifiers() const { 534 unsigned CVR = getLocalFastQualifiers(); 535 if (isLocalVolatileQualified()) 536 CVR |= Qualifiers::Volatile; 537 return CVR; 538 } 539 540 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 541 /// applied to this type. 542 unsigned getCVRQualifiers() const; 543 544 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 545 /// applied to this type, looking through any number of unqualified array 546 /// types to their element types' qualifiers. 547 unsigned getCVRQualifiersThroughArrayTypes() const; 548 549 bool isConstant(ASTContext& Ctx) const { 550 return QualType::isConstant(*this, Ctx); 551 } 552 553 // Don't promise in the API that anything besides 'const' can be 554 // easily added. 555 556 /// addConst - add the specified type qualifier to this QualType. 557 void addConst() { 558 addFastQualifiers(Qualifiers::Const); 559 } 560 QualType withConst() const { 561 return withFastQualifiers(Qualifiers::Const); 562 } 563 564 void addFastQualifiers(unsigned TQs) { 565 assert(!(TQs & ~Qualifiers::FastMask) 566 && "non-fast qualifier bits set in mask!"); 567 Value.setInt(Value.getInt() | TQs); 568 } 569 570 // FIXME: The remove* functions are semantically broken, because they might 571 // not remove a qualifier stored on a typedef. Most of the with* functions 572 // have the same problem. 573 void removeConst(); 574 void removeVolatile(); 575 void removeRestrict(); 576 void removeCVRQualifiers(unsigned Mask); 577 578 void removeFastQualifiers() { Value.setInt(0); } 579 void removeFastQualifiers(unsigned Mask) { 580 assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers"); 581 Value.setInt(Value.getInt() & ~Mask); 582 } 583 584 // Creates a type with the given qualifiers in addition to any 585 // qualifiers already on this type. 586 QualType withFastQualifiers(unsigned TQs) const { 587 QualType T = *this; 588 T.addFastQualifiers(TQs); 589 return T; 590 } 591 592 // Creates a type with exactly the given fast qualifiers, removing 593 // any existing fast qualifiers. 594 QualType withExactFastQualifiers(unsigned TQs) const { 595 return withoutFastQualifiers().withFastQualifiers(TQs); 596 } 597 598 // Removes fast qualifiers, but leaves any extended qualifiers in place. 599 QualType withoutFastQualifiers() const { 600 QualType T = *this; 601 T.removeFastQualifiers(); 602 return T; 603 } 604 605 /// \brief Return this type with all of the instance-specific qualifiers 606 /// removed, but without removing any qualifiers that may have been applied 607 /// through typedefs. 608 QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); } 609 610 /// \brief Return the unqualified form of the given type, which might be 611 /// desugared to eliminate qualifiers introduced via typedefs. 612 QualType getUnqualifiedType() const { 613 QualType T = getLocalUnqualifiedType(); 614 if (!T.hasQualifiers()) 615 return T; 616 617 return getUnqualifiedTypeSlow(); 618 } 619 620 bool isMoreQualifiedThan(QualType Other) const; 621 bool isAtLeastAsQualifiedAs(QualType Other) const; 622 QualType getNonReferenceType() const; 623 624 /// getDesugaredType - Return the specified type with any "sugar" removed from 625 /// the type. This takes off typedefs, typeof's etc. If the outer level of 626 /// the type is already concrete, it returns it unmodified. This is similar 627 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 628 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 629 /// concrete. 630 /// 631 /// Qualifiers are left in place. 632 QualType getDesugaredType() const { 633 return QualType::getDesugaredType(*this); 634 } 635 636 /// operator==/!= - Indicate whether the specified types and qualifiers are 637 /// identical. 638 friend bool operator==(const QualType &LHS, const QualType &RHS) { 639 return LHS.Value == RHS.Value; 640 } 641 friend bool operator!=(const QualType &LHS, const QualType &RHS) { 642 return LHS.Value != RHS.Value; 643 } 644 std::string getAsString() const; 645 646 std::string getAsString(const PrintingPolicy &Policy) const { 647 std::string S; 648 getAsStringInternal(S, Policy); 649 return S; 650 } 651 void getAsStringInternal(std::string &Str, 652 const PrintingPolicy &Policy) const; 653 654 void dump(const char *s) const; 655 void dump() const; 656 657 void Profile(llvm::FoldingSetNodeID &ID) const { 658 ID.AddPointer(getAsOpaquePtr()); 659 } 660 661 /// getAddressSpace - Return the address space of this type. 662 inline unsigned getAddressSpace() const; 663 664 /// GCAttrTypesAttr - Returns gc attribute of this type. 665 inline Qualifiers::GC getObjCGCAttr() const; 666 667 /// isObjCGCWeak true when Type is objc's weak. 668 bool isObjCGCWeak() const { 669 return getObjCGCAttr() == Qualifiers::Weak; 670 } 671 672 /// isObjCGCStrong true when Type is objc's strong. 673 bool isObjCGCStrong() const { 674 return getObjCGCAttr() == Qualifiers::Strong; 675 } 676 677 /// getNoReturnAttr - Returns true if the type has the noreturn attribute, 678 /// false otherwise. 679 bool getNoReturnAttr() const; 680 681 /// getCallConv - Returns the calling convention of the type if the type 682 /// is a function type, CC_Default otherwise. 683 CallingConv getCallConv() const; 684 685private: 686 // These methods are implemented in a separate translation unit; 687 // "static"-ize them to avoid creating temporary QualTypes in the 688 // caller. 689 static bool isConstant(QualType T, ASTContext& Ctx); 690 static QualType getDesugaredType(QualType T); 691}; 692 693} // end clang. 694 695namespace llvm { 696/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 697/// to a specific Type class. 698template<> struct simplify_type<const ::clang::QualType> { 699 typedef ::clang::Type* SimpleType; 700 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 701 return Val.getTypePtr(); 702 } 703}; 704template<> struct simplify_type< ::clang::QualType> 705 : public simplify_type<const ::clang::QualType> {}; 706 707// Teach SmallPtrSet that QualType is "basically a pointer". 708template<> 709class PointerLikeTypeTraits<clang::QualType> { 710public: 711 static inline void *getAsVoidPointer(clang::QualType P) { 712 return P.getAsOpaquePtr(); 713 } 714 static inline clang::QualType getFromVoidPointer(void *P) { 715 return clang::QualType::getFromOpaquePtr(P); 716 } 717 // Various qualifiers go in low bits. 718 enum { NumLowBitsAvailable = 0 }; 719}; 720 721} // end namespace llvm 722 723namespace clang { 724 725/// Type - This is the base class of the type hierarchy. A central concept 726/// with types is that each type always has a canonical type. A canonical type 727/// is the type with any typedef names stripped out of it or the types it 728/// references. For example, consider: 729/// 730/// typedef int foo; 731/// typedef foo* bar; 732/// 'int *' 'foo *' 'bar' 733/// 734/// There will be a Type object created for 'int'. Since int is canonical, its 735/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 736/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 737/// there is a PointerType that represents 'int*', which, like 'int', is 738/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 739/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 740/// is also 'int*'. 741/// 742/// Non-canonical types are useful for emitting diagnostics, without losing 743/// information about typedefs being used. Canonical types are useful for type 744/// comparisons (they allow by-pointer equality tests) and useful for reasoning 745/// about whether something has a particular form (e.g. is a function type), 746/// because they implicitly, recursively, strip all typedefs out of a type. 747/// 748/// Types, once created, are immutable. 749/// 750class Type { 751public: 752 enum TypeClass { 753#define TYPE(Class, Base) Class, 754#define ABSTRACT_TYPE(Class, Base) 755#include "clang/AST/TypeNodes.def" 756 TagFirst = Record, TagLast = Enum 757 }; 758 759protected: 760 enum { TypeClassBitSize = 6 }; 761 762private: 763 QualType CanonicalType; 764 765 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 766 bool Dependent : 1; 767 768 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 769 /// Note that this should stay at the end of the ivars for Type so that 770 /// subclasses can pack their bitfields into the same word. 771 unsigned TC : TypeClassBitSize; 772 773 Type(const Type&); // DO NOT IMPLEMENT. 774 void operator=(const Type&); // DO NOT IMPLEMENT. 775protected: 776 // silence VC++ warning C4355: 'this' : used in base member initializer list 777 Type *this_() { return this; } 778 Type(TypeClass tc, QualType Canonical, bool dependent) 779 : CanonicalType(Canonical.isNull() ? QualType(this_(), 0) : Canonical), 780 Dependent(dependent), TC(tc) {} 781 virtual ~Type() {} 782 virtual void Destroy(ASTContext& C); 783 friend class ASTContext; 784 785public: 786 TypeClass getTypeClass() const { return static_cast<TypeClass>(TC); } 787 788 bool isCanonicalUnqualified() const { 789 return CanonicalType.getTypePtr() == this; 790 } 791 792 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 793 /// object types, function types, and incomplete types. 794 795 /// \brief Determines whether the type describes an object in memory. 796 /// 797 /// Note that this definition of object type corresponds to the C++ 798 /// definition of object type, which includes incomplete types, as 799 /// opposed to the C definition (which does not include incomplete 800 /// types). 801 bool isObjectType() const; 802 803 /// isIncompleteType - Return true if this is an incomplete type. 804 /// A type that can describe objects, but which lacks information needed to 805 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 806 /// routine will need to determine if the size is actually required. 807 bool isIncompleteType() const; 808 809 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 810 /// type, in other words, not a function type. 811 bool isIncompleteOrObjectType() const { 812 return !isFunctionType(); 813 } 814 815 /// isPODType - Return true if this is a plain-old-data type (C++ 3.9p10). 816 bool isPODType() const; 817 818 /// isLiteralType - Return true if this is a literal type 819 /// (C++0x [basic.types]p10) 820 bool isLiteralType() const; 821 822 /// isVariablyModifiedType (C99 6.7.5.2p2) - Return true for variable array 823 /// types that have a non-constant expression. This does not include "[]". 824 bool isVariablyModifiedType() const; 825 826 /// Helper methods to distinguish type categories. All type predicates 827 /// operate on the canonical type, ignoring typedefs and qualifiers. 828 829 /// isSpecificBuiltinType - Test for a particular builtin type. 830 bool isSpecificBuiltinType(unsigned K) const; 831 832 /// isIntegerType() does *not* include complex integers (a GCC extension). 833 /// isComplexIntegerType() can be used to test for complex integers. 834 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 835 bool isEnumeralType() const; 836 bool isBooleanType() const; 837 bool isCharType() const; 838 bool isWideCharType() const; 839 bool isAnyCharacterType() const; 840 bool isIntegralType() const; 841 842 /// Floating point categories. 843 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 844 /// isComplexType() does *not* include complex integers (a GCC extension). 845 /// isComplexIntegerType() can be used to test for complex integers. 846 bool isComplexType() const; // C99 6.2.5p11 (complex) 847 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 848 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 849 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 850 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 851 bool isVoidType() const; // C99 6.2.5p19 852 bool isDerivedType() const; // C99 6.2.5p20 853 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 854 bool isAggregateType() const; 855 856 // Type Predicates: Check to see if this type is structurally the specified 857 // type, ignoring typedefs and qualifiers. 858 bool isFunctionType() const; 859 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 860 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 861 bool isPointerType() const; 862 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 863 bool isBlockPointerType() const; 864 bool isVoidPointerType() const; 865 bool isReferenceType() const; 866 bool isLValueReferenceType() const; 867 bool isRValueReferenceType() const; 868 bool isFunctionPointerType() const; 869 bool isMemberPointerType() const; 870 bool isMemberFunctionPointerType() const; 871 bool isArrayType() const; 872 bool isConstantArrayType() const; 873 bool isIncompleteArrayType() const; 874 bool isVariableArrayType() const; 875 bool isDependentSizedArrayType() const; 876 bool isRecordType() const; 877 bool isClassType() const; 878 bool isStructureType() const; 879 bool isUnionType() const; 880 bool isComplexIntegerType() const; // GCC _Complex integer type. 881 bool isVectorType() const; // GCC vector type. 882 bool isExtVectorType() const; // Extended vector type. 883 bool isObjCObjectPointerType() const; // Pointer to *any* ObjC object. 884 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 885 // for the common case. 886 bool isObjCInterfaceType() const; // NSString or NSString<foo> 887 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 888 bool isObjCQualifiedIdType() const; // id<foo> 889 bool isObjCQualifiedClassType() const; // Class<foo> 890 bool isObjCIdType() const; // id 891 bool isObjCClassType() const; // Class 892 bool isObjCSelType() const; // Class 893 bool isObjCBuiltinType() const; // 'id' or 'Class' 894 bool isTemplateTypeParmType() const; // C++ template type parameter 895 bool isNullPtrType() const; // C++0x nullptr_t 896 897 /// isDependentType - Whether this type is a dependent type, meaning 898 /// that its definition somehow depends on a template parameter 899 /// (C++ [temp.dep.type]). 900 bool isDependentType() const { return Dependent; } 901 bool isOverloadableType() const; 902 903 /// hasPointerRepresentation - Whether this type is represented 904 /// natively as a pointer; this includes pointers, references, block 905 /// pointers, and Objective-C interface, qualified id, and qualified 906 /// interface types, as well as nullptr_t. 907 bool hasPointerRepresentation() const; 908 909 /// hasObjCPointerRepresentation - Whether this type can represent 910 /// an objective pointer type for the purpose of GC'ability 911 bool hasObjCPointerRepresentation() const; 912 913 // Type Checking Functions: Check to see if this type is structurally the 914 // specified type, ignoring typedefs and qualifiers, and return a pointer to 915 // the best type we can. 916 const RecordType *getAsStructureType() const; 917 /// NOTE: getAs*ArrayType are methods on ASTContext. 918 const RecordType *getAsUnionType() const; 919 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 920 // The following is a convenience method that returns an ObjCObjectPointerType 921 // for object declared using an interface. 922 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 923 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 924 const ObjCInterfaceType *getAsObjCQualifiedInterfaceType() const; 925 const CXXRecordDecl *getCXXRecordDeclForPointerType() const; 926 927 // Member-template getAs<specific type>'. This scheme will eventually 928 // replace the specific getAsXXXX methods above. 929 // 930 // There are some specializations of this member template listed 931 // immediately following this class. 932 template <typename T> const T *getAs() const; 933 934 /// getAsPointerToObjCInterfaceType - If this is a pointer to an ObjC 935 /// interface, return the interface type, otherwise return null. 936 const ObjCInterfaceType *getAsPointerToObjCInterfaceType() const; 937 938 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 939 /// element type of the array, potentially with type qualifiers missing. 940 /// This method should never be used when type qualifiers are meaningful. 941 const Type *getArrayElementTypeNoTypeQual() const; 942 943 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 944 /// pointer, this returns the respective pointee. 945 QualType getPointeeType() const; 946 947 /// getUnqualifiedDesugaredType() - Return the specified type with 948 /// any "sugar" removed from the type, removing any typedefs, 949 /// typeofs, etc., as well as any qualifiers. 950 const Type *getUnqualifiedDesugaredType() const; 951 952 /// More type predicates useful for type checking/promotion 953 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 954 955 /// isSignedIntegerType - Return true if this is an integer type that is 956 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 957 /// an enum decl which has a signed representation, or a vector of signed 958 /// integer element type. 959 bool isSignedIntegerType() const; 960 961 /// isUnsignedIntegerType - Return true if this is an integer type that is 962 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 963 /// decl which has an unsigned representation, or a vector of unsigned integer 964 /// element type. 965 bool isUnsignedIntegerType() const; 966 967 /// isConstantSizeType - Return true if this is not a variable sized type, 968 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 969 /// incomplete types. 970 bool isConstantSizeType() const; 971 972 /// isSpecifierType - Returns true if this type can be represented by some 973 /// set of type specifiers. 974 bool isSpecifierType() const; 975 976 const char *getTypeClassName() const; 977 978 /// \brief Determine the linkage of this type. 979 virtual Linkage getLinkage() const; 980 981 QualType getCanonicalTypeInternal() const { return CanonicalType; } 982 void dump() const; 983 static bool classof(const Type *) { return true; } 984}; 985 986template <> inline const TypedefType *Type::getAs() const { 987 return dyn_cast<TypedefType>(this); 988} 989 990// We can do canonical leaf types faster, because we don't have to 991// worry about preserving child type decoration. 992#define TYPE(Class, Base) 993#define LEAF_TYPE(Class) \ 994template <> inline const Class##Type *Type::getAs() const { \ 995 return dyn_cast<Class##Type>(CanonicalType); \ 996} 997#include "clang/AST/TypeNodes.def" 998 999 1000/// BuiltinType - This class is used for builtin types like 'int'. Builtin 1001/// types are always canonical and have a literal name field. 1002class BuiltinType : public Type { 1003public: 1004 enum Kind { 1005 Void, 1006 1007 Bool, // This is bool and/or _Bool. 1008 Char_U, // This is 'char' for targets where char is unsigned. 1009 UChar, // This is explicitly qualified unsigned char. 1010 Char16, // This is 'char16_t' for C++. 1011 Char32, // This is 'char32_t' for C++. 1012 UShort, 1013 UInt, 1014 ULong, 1015 ULongLong, 1016 UInt128, // __uint128_t 1017 1018 Char_S, // This is 'char' for targets where char is signed. 1019 SChar, // This is explicitly qualified signed char. 1020 WChar, // This is 'wchar_t' for C++. 1021 Short, 1022 Int, 1023 Long, 1024 LongLong, 1025 Int128, // __int128_t 1026 1027 Float, Double, LongDouble, 1028 1029 NullPtr, // This is the type of C++0x 'nullptr'. 1030 1031 Overload, // This represents the type of an overloaded function declaration. 1032 Dependent, // This represents the type of a type-dependent expression. 1033 1034 UndeducedAuto, // In C++0x, this represents the type of an auto variable 1035 // that has not been deduced yet. 1036 ObjCId, // This represents the ObjC 'id' type. 1037 ObjCClass, // This represents the ObjC 'Class' type. 1038 ObjCSel // This represents the ObjC 'SEL' type. 1039 }; 1040private: 1041 Kind TypeKind; 1042public: 1043 BuiltinType(Kind K) 1044 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent)), 1045 TypeKind(K) {} 1046 1047 Kind getKind() const { return TypeKind; } 1048 const char *getName(const LangOptions &LO) const; 1049 1050 bool isSugared() const { return false; } 1051 QualType desugar() const { return QualType(this, 0); } 1052 1053 bool isInteger() const { 1054 return TypeKind >= Bool && TypeKind <= Int128; 1055 } 1056 1057 bool isSignedInteger() const { 1058 return TypeKind >= Char_S && TypeKind <= Int128; 1059 } 1060 1061 bool isUnsignedInteger() const { 1062 return TypeKind >= Bool && TypeKind <= UInt128; 1063 } 1064 1065 bool isFloatingPoint() const { 1066 return TypeKind >= Float && TypeKind <= LongDouble; 1067 } 1068 1069 virtual Linkage getLinkage() const; 1070 1071 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1072 static bool classof(const BuiltinType *) { return true; } 1073}; 1074 1075/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1076/// types (_Complex float etc) as well as the GCC integer complex extensions. 1077/// 1078class ComplexType : public Type, public llvm::FoldingSetNode { 1079 QualType ElementType; 1080 ComplexType(QualType Element, QualType CanonicalPtr) : 1081 Type(Complex, CanonicalPtr, Element->isDependentType()), 1082 ElementType(Element) { 1083 } 1084 friend class ASTContext; // ASTContext creates these. 1085public: 1086 QualType getElementType() const { return ElementType; } 1087 1088 bool isSugared() const { return false; } 1089 QualType desugar() const { return QualType(this, 0); } 1090 1091 void Profile(llvm::FoldingSetNodeID &ID) { 1092 Profile(ID, getElementType()); 1093 } 1094 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1095 ID.AddPointer(Element.getAsOpaquePtr()); 1096 } 1097 1098 virtual Linkage getLinkage() const; 1099 1100 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1101 static bool classof(const ComplexType *) { return true; } 1102}; 1103 1104/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1105/// 1106class PointerType : public Type, public llvm::FoldingSetNode { 1107 QualType PointeeType; 1108 1109 PointerType(QualType Pointee, QualType CanonicalPtr) : 1110 Type(Pointer, CanonicalPtr, Pointee->isDependentType()), PointeeType(Pointee) { 1111 } 1112 friend class ASTContext; // ASTContext creates these. 1113public: 1114 1115 QualType getPointeeType() const { return PointeeType; } 1116 1117 bool isSugared() const { return false; } 1118 QualType desugar() const { return QualType(this, 0); } 1119 1120 void Profile(llvm::FoldingSetNodeID &ID) { 1121 Profile(ID, getPointeeType()); 1122 } 1123 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1124 ID.AddPointer(Pointee.getAsOpaquePtr()); 1125 } 1126 1127 virtual Linkage getLinkage() const; 1128 1129 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1130 static bool classof(const PointerType *) { return true; } 1131}; 1132 1133/// BlockPointerType - pointer to a block type. 1134/// This type is to represent types syntactically represented as 1135/// "void (^)(int)", etc. Pointee is required to always be a function type. 1136/// 1137class BlockPointerType : public Type, public llvm::FoldingSetNode { 1138 QualType PointeeType; // Block is some kind of pointer type 1139 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1140 Type(BlockPointer, CanonicalCls, Pointee->isDependentType()), 1141 PointeeType(Pointee) { 1142 } 1143 friend class ASTContext; // ASTContext creates these. 1144public: 1145 1146 // Get the pointee type. Pointee is required to always be a function type. 1147 QualType getPointeeType() const { return PointeeType; } 1148 1149 bool isSugared() const { return false; } 1150 QualType desugar() const { return QualType(this, 0); } 1151 1152 void Profile(llvm::FoldingSetNodeID &ID) { 1153 Profile(ID, getPointeeType()); 1154 } 1155 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1156 ID.AddPointer(Pointee.getAsOpaquePtr()); 1157 } 1158 1159 virtual Linkage getLinkage() const; 1160 1161 static bool classof(const Type *T) { 1162 return T->getTypeClass() == BlockPointer; 1163 } 1164 static bool classof(const BlockPointerType *) { return true; } 1165}; 1166 1167/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 1168/// 1169class ReferenceType : public Type, public llvm::FoldingSetNode { 1170 QualType PointeeType; 1171 1172 /// True if the type was originally spelled with an lvalue sigil. 1173 /// This is never true of rvalue references but can also be false 1174 /// on lvalue references because of C++0x [dcl.typedef]p9, 1175 /// as follows: 1176 /// 1177 /// typedef int &ref; // lvalue, spelled lvalue 1178 /// typedef int &&rvref; // rvalue 1179 /// ref &a; // lvalue, inner ref, spelled lvalue 1180 /// ref &&a; // lvalue, inner ref 1181 /// rvref &a; // lvalue, inner ref, spelled lvalue 1182 /// rvref &&a; // rvalue, inner ref 1183 bool SpelledAsLValue; 1184 1185 /// True if the inner type is a reference type. This only happens 1186 /// in non-canonical forms. 1187 bool InnerRef; 1188 1189protected: 1190 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 1191 bool SpelledAsLValue) : 1192 Type(tc, CanonicalRef, Referencee->isDependentType()), 1193 PointeeType(Referencee), SpelledAsLValue(SpelledAsLValue), 1194 InnerRef(Referencee->isReferenceType()) { 1195 } 1196public: 1197 bool isSpelledAsLValue() const { return SpelledAsLValue; } 1198 1199 QualType getPointeeTypeAsWritten() const { return PointeeType; } 1200 QualType getPointeeType() const { 1201 // FIXME: this might strip inner qualifiers; okay? 1202 const ReferenceType *T = this; 1203 while (T->InnerRef) 1204 T = T->PointeeType->getAs<ReferenceType>(); 1205 return T->PointeeType; 1206 } 1207 1208 void Profile(llvm::FoldingSetNodeID &ID) { 1209 Profile(ID, PointeeType, SpelledAsLValue); 1210 } 1211 static void Profile(llvm::FoldingSetNodeID &ID, 1212 QualType Referencee, 1213 bool SpelledAsLValue) { 1214 ID.AddPointer(Referencee.getAsOpaquePtr()); 1215 ID.AddBoolean(SpelledAsLValue); 1216 } 1217 1218 virtual Linkage getLinkage() const; 1219 1220 static bool classof(const Type *T) { 1221 return T->getTypeClass() == LValueReference || 1222 T->getTypeClass() == RValueReference; 1223 } 1224 static bool classof(const ReferenceType *) { return true; } 1225}; 1226 1227/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 1228/// 1229class LValueReferenceType : public ReferenceType { 1230 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 1231 bool SpelledAsLValue) : 1232 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 1233 {} 1234 friend class ASTContext; // ASTContext creates these 1235public: 1236 bool isSugared() const { return false; } 1237 QualType desugar() const { return QualType(this, 0); } 1238 1239 static bool classof(const Type *T) { 1240 return T->getTypeClass() == LValueReference; 1241 } 1242 static bool classof(const LValueReferenceType *) { return true; } 1243}; 1244 1245/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 1246/// 1247class RValueReferenceType : public ReferenceType { 1248 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 1249 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 1250 } 1251 friend class ASTContext; // ASTContext creates these 1252public: 1253 bool isSugared() const { return false; } 1254 QualType desugar() const { return QualType(this, 0); } 1255 1256 static bool classof(const Type *T) { 1257 return T->getTypeClass() == RValueReference; 1258 } 1259 static bool classof(const RValueReferenceType *) { return true; } 1260}; 1261 1262/// MemberPointerType - C++ 8.3.3 - Pointers to members 1263/// 1264class MemberPointerType : public Type, public llvm::FoldingSetNode { 1265 QualType PointeeType; 1266 /// The class of which the pointee is a member. Must ultimately be a 1267 /// RecordType, but could be a typedef or a template parameter too. 1268 const Type *Class; 1269 1270 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 1271 Type(MemberPointer, CanonicalPtr, 1272 Cls->isDependentType() || Pointee->isDependentType()), 1273 PointeeType(Pointee), Class(Cls) { 1274 } 1275 friend class ASTContext; // ASTContext creates these. 1276public: 1277 1278 QualType getPointeeType() const { return PointeeType; } 1279 1280 const Type *getClass() const { return Class; } 1281 1282 bool isSugared() const { return false; } 1283 QualType desugar() const { return QualType(this, 0); } 1284 1285 void Profile(llvm::FoldingSetNodeID &ID) { 1286 Profile(ID, getPointeeType(), getClass()); 1287 } 1288 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 1289 const Type *Class) { 1290 ID.AddPointer(Pointee.getAsOpaquePtr()); 1291 ID.AddPointer(Class); 1292 } 1293 1294 virtual Linkage getLinkage() const; 1295 1296 static bool classof(const Type *T) { 1297 return T->getTypeClass() == MemberPointer; 1298 } 1299 static bool classof(const MemberPointerType *) { return true; } 1300}; 1301 1302/// ArrayType - C99 6.7.5.2 - Array Declarators. 1303/// 1304class ArrayType : public Type, public llvm::FoldingSetNode { 1305public: 1306 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 1307 /// an array with a static size (e.g. int X[static 4]), or an array 1308 /// with a star size (e.g. int X[*]). 1309 /// 'static' is only allowed on function parameters. 1310 enum ArraySizeModifier { 1311 Normal, Static, Star 1312 }; 1313private: 1314 /// ElementType - The element type of the array. 1315 QualType ElementType; 1316 1317 // NOTE: VC++ treats enums as signed, avoid using the ArraySizeModifier enum 1318 /// NOTE: These fields are packed into the bitfields space in the Type class. 1319 unsigned SizeModifier : 2; 1320 1321 /// IndexTypeQuals - Capture qualifiers in declarations like: 1322 /// 'int X[static restrict 4]'. For function parameters only. 1323 unsigned IndexTypeQuals : 3; 1324 1325protected: 1326 // C++ [temp.dep.type]p1: 1327 // A type is dependent if it is... 1328 // - an array type constructed from any dependent type or whose 1329 // size is specified by a constant expression that is 1330 // value-dependent, 1331 ArrayType(TypeClass tc, QualType et, QualType can, 1332 ArraySizeModifier sm, unsigned tq) 1333 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray), 1334 ElementType(et), SizeModifier(sm), IndexTypeQuals(tq) {} 1335 1336 friend class ASTContext; // ASTContext creates these. 1337public: 1338 QualType getElementType() const { return ElementType; } 1339 ArraySizeModifier getSizeModifier() const { 1340 return ArraySizeModifier(SizeModifier); 1341 } 1342 Qualifiers getIndexTypeQualifiers() const { 1343 return Qualifiers::fromCVRMask(IndexTypeQuals); 1344 } 1345 unsigned getIndexTypeCVRQualifiers() const { return IndexTypeQuals; } 1346 1347 virtual Linkage getLinkage() const; 1348 1349 static bool classof(const Type *T) { 1350 return T->getTypeClass() == ConstantArray || 1351 T->getTypeClass() == VariableArray || 1352 T->getTypeClass() == IncompleteArray || 1353 T->getTypeClass() == DependentSizedArray; 1354 } 1355 static bool classof(const ArrayType *) { return true; } 1356}; 1357 1358/// ConstantArrayType - This class represents the canonical version of 1359/// C arrays with a specified constant size. For example, the canonical 1360/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 1361/// type is 'int' and the size is 404. 1362class ConstantArrayType : public ArrayType { 1363 llvm::APInt Size; // Allows us to unique the type. 1364 1365 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 1366 ArraySizeModifier sm, unsigned tq) 1367 : ArrayType(ConstantArray, et, can, sm, tq), 1368 Size(size) {} 1369protected: 1370 ConstantArrayType(TypeClass tc, QualType et, QualType can, 1371 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 1372 : ArrayType(tc, et, can, sm, tq), Size(size) {} 1373 friend class ASTContext; // ASTContext creates these. 1374public: 1375 const llvm::APInt &getSize() const { return Size; } 1376 bool isSugared() const { return false; } 1377 QualType desugar() const { return QualType(this, 0); } 1378 1379 void Profile(llvm::FoldingSetNodeID &ID) { 1380 Profile(ID, getElementType(), getSize(), 1381 getSizeModifier(), getIndexTypeCVRQualifiers()); 1382 } 1383 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1384 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 1385 unsigned TypeQuals) { 1386 ID.AddPointer(ET.getAsOpaquePtr()); 1387 ID.AddInteger(ArraySize.getZExtValue()); 1388 ID.AddInteger(SizeMod); 1389 ID.AddInteger(TypeQuals); 1390 } 1391 static bool classof(const Type *T) { 1392 return T->getTypeClass() == ConstantArray; 1393 } 1394 static bool classof(const ConstantArrayType *) { return true; } 1395}; 1396 1397/// IncompleteArrayType - This class represents C arrays with an unspecified 1398/// size. For example 'int A[]' has an IncompleteArrayType where the element 1399/// type is 'int' and the size is unspecified. 1400class IncompleteArrayType : public ArrayType { 1401 1402 IncompleteArrayType(QualType et, QualType can, 1403 ArraySizeModifier sm, unsigned tq) 1404 : ArrayType(IncompleteArray, et, can, sm, tq) {} 1405 friend class ASTContext; // ASTContext creates these. 1406public: 1407 bool isSugared() const { return false; } 1408 QualType desugar() const { return QualType(this, 0); } 1409 1410 static bool classof(const Type *T) { 1411 return T->getTypeClass() == IncompleteArray; 1412 } 1413 static bool classof(const IncompleteArrayType *) { return true; } 1414 1415 friend class StmtIteratorBase; 1416 1417 void Profile(llvm::FoldingSetNodeID &ID) { 1418 Profile(ID, getElementType(), getSizeModifier(), 1419 getIndexTypeCVRQualifiers()); 1420 } 1421 1422 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1423 ArraySizeModifier SizeMod, unsigned TypeQuals) { 1424 ID.AddPointer(ET.getAsOpaquePtr()); 1425 ID.AddInteger(SizeMod); 1426 ID.AddInteger(TypeQuals); 1427 } 1428}; 1429 1430/// VariableArrayType - This class represents C arrays with a specified size 1431/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 1432/// Since the size expression is an arbitrary expression, we store it as such. 1433/// 1434/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 1435/// should not be: two lexically equivalent variable array types could mean 1436/// different things, for example, these variables do not have the same type 1437/// dynamically: 1438/// 1439/// void foo(int x) { 1440/// int Y[x]; 1441/// ++x; 1442/// int Z[x]; 1443/// } 1444/// 1445class VariableArrayType : public ArrayType { 1446 /// SizeExpr - An assignment expression. VLA's are only permitted within 1447 /// a function block. 1448 Stmt *SizeExpr; 1449 /// Brackets - The left and right array brackets. 1450 SourceRange Brackets; 1451 1452 VariableArrayType(QualType et, QualType can, Expr *e, 1453 ArraySizeModifier sm, unsigned tq, 1454 SourceRange brackets) 1455 : ArrayType(VariableArray, et, can, sm, tq), 1456 SizeExpr((Stmt*) e), Brackets(brackets) {} 1457 friend class ASTContext; // ASTContext creates these. 1458 virtual void Destroy(ASTContext& C); 1459 1460public: 1461 Expr *getSizeExpr() const { 1462 // We use C-style casts instead of cast<> here because we do not wish 1463 // to have a dependency of Type.h on Stmt.h/Expr.h. 1464 return (Expr*) SizeExpr; 1465 } 1466 SourceRange getBracketsRange() const { return Brackets; } 1467 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1468 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1469 1470 bool isSugared() const { return false; } 1471 QualType desugar() const { return QualType(this, 0); } 1472 1473 static bool classof(const Type *T) { 1474 return T->getTypeClass() == VariableArray; 1475 } 1476 static bool classof(const VariableArrayType *) { return true; } 1477 1478 friend class StmtIteratorBase; 1479 1480 void Profile(llvm::FoldingSetNodeID &ID) { 1481 assert(0 && "Cannnot unique VariableArrayTypes."); 1482 } 1483}; 1484 1485/// DependentSizedArrayType - This type represents an array type in 1486/// C++ whose size is a value-dependent expression. For example: 1487/// 1488/// \code 1489/// template<typename T, int Size> 1490/// class array { 1491/// T data[Size]; 1492/// }; 1493/// \endcode 1494/// 1495/// For these types, we won't actually know what the array bound is 1496/// until template instantiation occurs, at which point this will 1497/// become either a ConstantArrayType or a VariableArrayType. 1498class DependentSizedArrayType : public ArrayType { 1499 ASTContext &Context; 1500 1501 /// \brief An assignment expression that will instantiate to the 1502 /// size of the array. 1503 /// 1504 /// The expression itself might be NULL, in which case the array 1505 /// type will have its size deduced from an initializer. 1506 Stmt *SizeExpr; 1507 1508 /// Brackets - The left and right array brackets. 1509 SourceRange Brackets; 1510 1511 DependentSizedArrayType(ASTContext &Context, QualType et, QualType can, 1512 Expr *e, ArraySizeModifier sm, unsigned tq, 1513 SourceRange brackets) 1514 : ArrayType(DependentSizedArray, et, can, sm, tq), 1515 Context(Context), SizeExpr((Stmt*) e), Brackets(brackets) {} 1516 friend class ASTContext; // ASTContext creates these. 1517 virtual void Destroy(ASTContext& C); 1518 1519public: 1520 Expr *getSizeExpr() const { 1521 // We use C-style casts instead of cast<> here because we do not wish 1522 // to have a dependency of Type.h on Stmt.h/Expr.h. 1523 return (Expr*) SizeExpr; 1524 } 1525 SourceRange getBracketsRange() const { return Brackets; } 1526 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1527 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1528 1529 bool isSugared() const { return false; } 1530 QualType desugar() const { return QualType(this, 0); } 1531 1532 static bool classof(const Type *T) { 1533 return T->getTypeClass() == DependentSizedArray; 1534 } 1535 static bool classof(const DependentSizedArrayType *) { return true; } 1536 1537 friend class StmtIteratorBase; 1538 1539 1540 void Profile(llvm::FoldingSetNodeID &ID) { 1541 Profile(ID, Context, getElementType(), 1542 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 1543 } 1544 1545 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1546 QualType ET, ArraySizeModifier SizeMod, 1547 unsigned TypeQuals, Expr *E); 1548}; 1549 1550/// DependentSizedExtVectorType - This type represent an extended vector type 1551/// where either the type or size is dependent. For example: 1552/// @code 1553/// template<typename T, int Size> 1554/// class vector { 1555/// typedef T __attribute__((ext_vector_type(Size))) type; 1556/// } 1557/// @endcode 1558class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 1559 ASTContext &Context; 1560 Expr *SizeExpr; 1561 /// ElementType - The element type of the array. 1562 QualType ElementType; 1563 SourceLocation loc; 1564 1565 DependentSizedExtVectorType(ASTContext &Context, QualType ElementType, 1566 QualType can, Expr *SizeExpr, SourceLocation loc) 1567 : Type (DependentSizedExtVector, can, true), 1568 Context(Context), SizeExpr(SizeExpr), ElementType(ElementType), 1569 loc(loc) {} 1570 friend class ASTContext; 1571 virtual void Destroy(ASTContext& C); 1572 1573public: 1574 Expr *getSizeExpr() const { return SizeExpr; } 1575 QualType getElementType() const { return ElementType; } 1576 SourceLocation getAttributeLoc() const { return loc; } 1577 1578 bool isSugared() const { return false; } 1579 QualType desugar() const { return QualType(this, 0); } 1580 1581 static bool classof(const Type *T) { 1582 return T->getTypeClass() == DependentSizedExtVector; 1583 } 1584 static bool classof(const DependentSizedExtVectorType *) { return true; } 1585 1586 void Profile(llvm::FoldingSetNodeID &ID) { 1587 Profile(ID, Context, getElementType(), getSizeExpr()); 1588 } 1589 1590 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1591 QualType ElementType, Expr *SizeExpr); 1592}; 1593 1594 1595/// VectorType - GCC generic vector type. This type is created using 1596/// __attribute__((vector_size(n)), where "n" specifies the vector size in 1597/// bytes. Since the constructor takes the number of vector elements, the 1598/// client is responsible for converting the size into the number of elements. 1599class VectorType : public Type, public llvm::FoldingSetNode { 1600protected: 1601 /// ElementType - The element type of the vector. 1602 QualType ElementType; 1603 1604 /// NumElements - The number of elements in the vector. 1605 unsigned NumElements; 1606 1607 VectorType(QualType vecType, unsigned nElements, QualType canonType) : 1608 Type(Vector, canonType, vecType->isDependentType()), 1609 ElementType(vecType), NumElements(nElements) {} 1610 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 1611 QualType canonType) 1612 : Type(tc, canonType, vecType->isDependentType()), ElementType(vecType), 1613 NumElements(nElements) {} 1614 friend class ASTContext; // ASTContext creates these. 1615public: 1616 1617 QualType getElementType() const { return ElementType; } 1618 unsigned getNumElements() const { return NumElements; } 1619 1620 bool isSugared() const { return false; } 1621 QualType desugar() const { return QualType(this, 0); } 1622 1623 void Profile(llvm::FoldingSetNodeID &ID) { 1624 Profile(ID, getElementType(), getNumElements(), getTypeClass()); 1625 } 1626 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 1627 unsigned NumElements, TypeClass TypeClass) { 1628 ID.AddPointer(ElementType.getAsOpaquePtr()); 1629 ID.AddInteger(NumElements); 1630 ID.AddInteger(TypeClass); 1631 } 1632 1633 virtual Linkage getLinkage() const; 1634 1635 static bool classof(const Type *T) { 1636 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 1637 } 1638 static bool classof(const VectorType *) { return true; } 1639}; 1640 1641/// ExtVectorType - Extended vector type. This type is created using 1642/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 1643/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 1644/// class enables syntactic extensions, like Vector Components for accessing 1645/// points, colors, and textures (modeled after OpenGL Shading Language). 1646class ExtVectorType : public VectorType { 1647 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 1648 VectorType(ExtVector, vecType, nElements, canonType) {} 1649 friend class ASTContext; // ASTContext creates these. 1650public: 1651 static int getPointAccessorIdx(char c) { 1652 switch (c) { 1653 default: return -1; 1654 case 'x': return 0; 1655 case 'y': return 1; 1656 case 'z': return 2; 1657 case 'w': return 3; 1658 } 1659 } 1660 static int getNumericAccessorIdx(char c) { 1661 switch (c) { 1662 default: return -1; 1663 case '0': return 0; 1664 case '1': return 1; 1665 case '2': return 2; 1666 case '3': return 3; 1667 case '4': return 4; 1668 case '5': return 5; 1669 case '6': return 6; 1670 case '7': return 7; 1671 case '8': return 8; 1672 case '9': return 9; 1673 case 'A': 1674 case 'a': return 10; 1675 case 'B': 1676 case 'b': return 11; 1677 case 'C': 1678 case 'c': return 12; 1679 case 'D': 1680 case 'd': return 13; 1681 case 'E': 1682 case 'e': return 14; 1683 case 'F': 1684 case 'f': return 15; 1685 } 1686 } 1687 1688 static int getAccessorIdx(char c) { 1689 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 1690 return getNumericAccessorIdx(c); 1691 } 1692 1693 bool isAccessorWithinNumElements(char c) const { 1694 if (int idx = getAccessorIdx(c)+1) 1695 return unsigned(idx-1) < NumElements; 1696 return false; 1697 } 1698 bool isSugared() const { return false; } 1699 QualType desugar() const { return QualType(this, 0); } 1700 1701 static bool classof(const Type *T) { 1702 return T->getTypeClass() == ExtVector; 1703 } 1704 static bool classof(const ExtVectorType *) { return true; } 1705}; 1706 1707/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 1708/// class of FunctionNoProtoType and FunctionProtoType. 1709/// 1710class FunctionType : public Type { 1711 /// SubClassData - This field is owned by the subclass, put here to pack 1712 /// tightly with the ivars in Type. 1713 bool SubClassData : 1; 1714 1715 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1716 /// other bitfields. 1717 /// The qualifiers are part of FunctionProtoType because... 1718 /// 1719 /// C++ 8.3.5p4: The return type, the parameter type list and the 1720 /// cv-qualifier-seq, [...], are part of the function type. 1721 /// 1722 unsigned TypeQuals : 3; 1723 1724 /// NoReturn - Indicates if the function type is attribute noreturn. 1725 unsigned NoReturn : 1; 1726 1727 /// CallConv - The calling convention used by the function. 1728 unsigned CallConv : 2; 1729 1730 // The type returned by the function. 1731 QualType ResultType; 1732protected: 1733 FunctionType(TypeClass tc, QualType res, bool SubclassInfo, 1734 unsigned typeQuals, QualType Canonical, bool Dependent, 1735 bool noReturn = false, CallingConv callConv = CC_Default) 1736 : Type(tc, Canonical, Dependent), 1737 SubClassData(SubclassInfo), TypeQuals(typeQuals), NoReturn(noReturn), 1738 CallConv(callConv), ResultType(res) {} 1739 bool getSubClassData() const { return SubClassData; } 1740 unsigned getTypeQuals() const { return TypeQuals; } 1741public: 1742 1743 QualType getResultType() const { return ResultType; } 1744 bool getNoReturnAttr() const { return NoReturn; } 1745 CallingConv getCallConv() const { return (CallingConv)CallConv; } 1746 1747 static bool classof(const Type *T) { 1748 return T->getTypeClass() == FunctionNoProto || 1749 T->getTypeClass() == FunctionProto; 1750 } 1751 static bool classof(const FunctionType *) { return true; } 1752}; 1753 1754/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 1755/// no information available about its arguments. 1756class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 1757 FunctionNoProtoType(QualType Result, QualType Canonical, 1758 bool NoReturn = false, CallingConv CallConv = CC_Default) 1759 : FunctionType(FunctionNoProto, Result, false, 0, Canonical, 1760 /*Dependent=*/false, NoReturn, CallConv) {} 1761 friend class ASTContext; // ASTContext creates these. 1762public: 1763 // No additional state past what FunctionType provides. 1764 1765 bool isSugared() const { return false; } 1766 QualType desugar() const { return QualType(this, 0); } 1767 1768 void Profile(llvm::FoldingSetNodeID &ID) { 1769 Profile(ID, getResultType(), getNoReturnAttr()); 1770 } 1771 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 1772 bool NoReturn) { 1773 ID.AddInteger(NoReturn); 1774 ID.AddPointer(ResultType.getAsOpaquePtr()); 1775 } 1776 1777 virtual Linkage getLinkage() const; 1778 1779 static bool classof(const Type *T) { 1780 return T->getTypeClass() == FunctionNoProto; 1781 } 1782 static bool classof(const FunctionNoProtoType *) { return true; } 1783}; 1784 1785/// FunctionProtoType - Represents a prototype with argument type info, e.g. 1786/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 1787/// arguments, not as having a single void argument. Such a type can have an 1788/// exception specification, but this specification is not part of the canonical 1789/// type. 1790class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 1791 /// hasAnyDependentType - Determine whether there are any dependent 1792 /// types within the arguments passed in. 1793 static bool hasAnyDependentType(const QualType *ArgArray, unsigned numArgs) { 1794 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 1795 if (ArgArray[Idx]->isDependentType()) 1796 return true; 1797 1798 return false; 1799 } 1800 1801 FunctionProtoType(QualType Result, const QualType *ArgArray, unsigned numArgs, 1802 bool isVariadic, unsigned typeQuals, bool hasExs, 1803 bool hasAnyExs, const QualType *ExArray, 1804 unsigned numExs, QualType Canonical, bool NoReturn, 1805 CallingConv CallConv) 1806 : FunctionType(FunctionProto, Result, isVariadic, typeQuals, Canonical, 1807 (Result->isDependentType() || 1808 hasAnyDependentType(ArgArray, numArgs)), NoReturn, 1809 CallConv), 1810 NumArgs(numArgs), NumExceptions(numExs), HasExceptionSpec(hasExs), 1811 AnyExceptionSpec(hasAnyExs) { 1812 // Fill in the trailing argument array. 1813 QualType *ArgInfo = reinterpret_cast<QualType*>(this+1); 1814 for (unsigned i = 0; i != numArgs; ++i) 1815 ArgInfo[i] = ArgArray[i]; 1816 // Fill in the exception array. 1817 QualType *Ex = ArgInfo + numArgs; 1818 for (unsigned i = 0; i != numExs; ++i) 1819 Ex[i] = ExArray[i]; 1820 } 1821 1822 /// NumArgs - The number of arguments this function has, not counting '...'. 1823 unsigned NumArgs : 20; 1824 1825 /// NumExceptions - The number of types in the exception spec, if any. 1826 unsigned NumExceptions : 10; 1827 1828 /// HasExceptionSpec - Whether this function has an exception spec at all. 1829 bool HasExceptionSpec : 1; 1830 1831 /// AnyExceptionSpec - Whether this function has a throw(...) spec. 1832 bool AnyExceptionSpec : 1; 1833 1834 /// ArgInfo - There is an variable size array after the class in memory that 1835 /// holds the argument types. 1836 1837 /// Exceptions - There is another variable size array after ArgInfo that 1838 /// holds the exception types. 1839 1840 friend class ASTContext; // ASTContext creates these. 1841 1842public: 1843 unsigned getNumArgs() const { return NumArgs; } 1844 QualType getArgType(unsigned i) const { 1845 assert(i < NumArgs && "Invalid argument number!"); 1846 return arg_type_begin()[i]; 1847 } 1848 1849 bool hasExceptionSpec() const { return HasExceptionSpec; } 1850 bool hasAnyExceptionSpec() const { return AnyExceptionSpec; } 1851 unsigned getNumExceptions() const { return NumExceptions; } 1852 QualType getExceptionType(unsigned i) const { 1853 assert(i < NumExceptions && "Invalid exception number!"); 1854 return exception_begin()[i]; 1855 } 1856 bool hasEmptyExceptionSpec() const { 1857 return hasExceptionSpec() && !hasAnyExceptionSpec() && 1858 getNumExceptions() == 0; 1859 } 1860 1861 bool isVariadic() const { return getSubClassData(); } 1862 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 1863 1864 typedef const QualType *arg_type_iterator; 1865 arg_type_iterator arg_type_begin() const { 1866 return reinterpret_cast<const QualType *>(this+1); 1867 } 1868 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 1869 1870 typedef const QualType *exception_iterator; 1871 exception_iterator exception_begin() const { 1872 // exceptions begin where arguments end 1873 return arg_type_end(); 1874 } 1875 exception_iterator exception_end() const { 1876 return exception_begin() + NumExceptions; 1877 } 1878 1879 bool isSugared() const { return false; } 1880 QualType desugar() const { return QualType(this, 0); } 1881 1882 virtual Linkage getLinkage() const; 1883 1884 static bool classof(const Type *T) { 1885 return T->getTypeClass() == FunctionProto; 1886 } 1887 static bool classof(const FunctionProtoType *) { return true; } 1888 1889 void Profile(llvm::FoldingSetNodeID &ID); 1890 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 1891 arg_type_iterator ArgTys, unsigned NumArgs, 1892 bool isVariadic, unsigned TypeQuals, 1893 bool hasExceptionSpec, bool anyExceptionSpec, 1894 unsigned NumExceptions, exception_iterator Exs, 1895 bool NoReturn); 1896}; 1897 1898 1899/// \brief Represents the dependent type named by a dependently-scoped 1900/// typename using declaration, e.g. 1901/// using typename Base<T>::foo; 1902/// Template instantiation turns these into the underlying type. 1903class UnresolvedUsingType : public Type { 1904 UnresolvedUsingTypenameDecl *Decl; 1905 1906 UnresolvedUsingType(UnresolvedUsingTypenameDecl *D) 1907 : Type(UnresolvedUsing, QualType(), true), Decl(D) {} 1908 friend class ASTContext; // ASTContext creates these. 1909public: 1910 1911 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 1912 1913 bool isSugared() const { return false; } 1914 QualType desugar() const { return QualType(this, 0); } 1915 1916 static bool classof(const Type *T) { 1917 return T->getTypeClass() == UnresolvedUsing; 1918 } 1919 static bool classof(const UnresolvedUsingType *) { return true; } 1920 1921 void Profile(llvm::FoldingSetNodeID &ID) { 1922 return Profile(ID, Decl); 1923 } 1924 static void Profile(llvm::FoldingSetNodeID &ID, 1925 UnresolvedUsingTypenameDecl *D) { 1926 ID.AddPointer(D); 1927 } 1928}; 1929 1930 1931class TypedefType : public Type { 1932 TypedefDecl *Decl; 1933protected: 1934 TypedefType(TypeClass tc, TypedefDecl *D, QualType can) 1935 : Type(tc, can, can->isDependentType()), Decl(D) { 1936 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1937 } 1938 friend class ASTContext; // ASTContext creates these. 1939public: 1940 1941 TypedefDecl *getDecl() const { return Decl; } 1942 1943 /// LookThroughTypedefs - Return the ultimate type this typedef corresponds to 1944 /// potentially looking through *all* consecutive typedefs. This returns the 1945 /// sum of the type qualifiers, so if you have: 1946 /// typedef const int A; 1947 /// typedef volatile A B; 1948 /// looking through the typedefs for B will give you "const volatile A". 1949 QualType LookThroughTypedefs() const; 1950 1951 bool isSugared() const { return true; } 1952 QualType desugar() const; 1953 1954 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 1955 static bool classof(const TypedefType *) { return true; } 1956}; 1957 1958/// TypeOfExprType (GCC extension). 1959class TypeOfExprType : public Type { 1960 Expr *TOExpr; 1961 1962protected: 1963 TypeOfExprType(Expr *E, QualType can = QualType()); 1964 friend class ASTContext; // ASTContext creates these. 1965public: 1966 Expr *getUnderlyingExpr() const { return TOExpr; } 1967 1968 /// \brief Remove a single level of sugar. 1969 QualType desugar() const; 1970 1971 /// \brief Returns whether this type directly provides sugar. 1972 bool isSugared() const { return true; } 1973 1974 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 1975 static bool classof(const TypeOfExprType *) { return true; } 1976}; 1977 1978/// Subclass of TypeOfExprType that is used for canonical, dependent 1979/// typeof(expr) types. 1980class DependentTypeOfExprType 1981 : public TypeOfExprType, public llvm::FoldingSetNode { 1982 ASTContext &Context; 1983 1984public: 1985 DependentTypeOfExprType(ASTContext &Context, Expr *E) 1986 : TypeOfExprType(E), Context(Context) { } 1987 1988 bool isSugared() const { return false; } 1989 QualType desugar() const { return QualType(this, 0); } 1990 1991 void Profile(llvm::FoldingSetNodeID &ID) { 1992 Profile(ID, Context, getUnderlyingExpr()); 1993 } 1994 1995 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1996 Expr *E); 1997}; 1998 1999/// TypeOfType (GCC extension). 2000class TypeOfType : public Type { 2001 QualType TOType; 2002 TypeOfType(QualType T, QualType can) 2003 : Type(TypeOf, can, T->isDependentType()), TOType(T) { 2004 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2005 } 2006 friend class ASTContext; // ASTContext creates these. 2007public: 2008 QualType getUnderlyingType() const { return TOType; } 2009 2010 /// \brief Remove a single level of sugar. 2011 QualType desugar() const { return getUnderlyingType(); } 2012 2013 /// \brief Returns whether this type directly provides sugar. 2014 bool isSugared() const { return true; } 2015 2016 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 2017 static bool classof(const TypeOfType *) { return true; } 2018}; 2019 2020/// DecltypeType (C++0x) 2021class DecltypeType : public Type { 2022 Expr *E; 2023 2024 // FIXME: We could get rid of UnderlyingType if we wanted to: We would have to 2025 // Move getDesugaredType to ASTContext so that it can call getDecltypeForExpr 2026 // from it. 2027 QualType UnderlyingType; 2028 2029protected: 2030 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 2031 friend class ASTContext; // ASTContext creates these. 2032public: 2033 Expr *getUnderlyingExpr() const { return E; } 2034 QualType getUnderlyingType() const { return UnderlyingType; } 2035 2036 /// \brief Remove a single level of sugar. 2037 QualType desugar() const { return getUnderlyingType(); } 2038 2039 /// \brief Returns whether this type directly provides sugar. 2040 bool isSugared() const { return !isDependentType(); } 2041 2042 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 2043 static bool classof(const DecltypeType *) { return true; } 2044}; 2045 2046/// Subclass of DecltypeType that is used for canonical, dependent 2047/// C++0x decltype types. 2048class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 2049 ASTContext &Context; 2050 2051public: 2052 DependentDecltypeType(ASTContext &Context, Expr *E); 2053 2054 bool isSugared() const { return false; } 2055 QualType desugar() const { return QualType(this, 0); } 2056 2057 void Profile(llvm::FoldingSetNodeID &ID) { 2058 Profile(ID, Context, getUnderlyingExpr()); 2059 } 2060 2061 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2062 Expr *E); 2063}; 2064 2065class TagType : public Type { 2066 /// Stores the TagDecl associated with this type. The decl will 2067 /// point to the TagDecl that actually defines the entity (or is a 2068 /// definition in progress), if there is such a definition. The 2069 /// single-bit value will be non-zero when this tag is in the 2070 /// process of being defined. 2071 mutable llvm::PointerIntPair<TagDecl *, 1> decl; 2072 friend class ASTContext; 2073 friend class TagDecl; 2074 2075protected: 2076 TagType(TypeClass TC, TagDecl *D, QualType can); 2077 2078public: 2079 TagDecl *getDecl() const { return decl.getPointer(); } 2080 2081 /// @brief Determines whether this type is in the process of being 2082 /// defined. 2083 bool isBeingDefined() const { return decl.getInt(); } 2084 void setBeingDefined(bool Def) const { decl.setInt(Def? 1 : 0); } 2085 2086 virtual Linkage getLinkage() const; 2087 2088 static bool classof(const Type *T) { 2089 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 2090 } 2091 static bool classof(const TagType *) { return true; } 2092 static bool classof(const RecordType *) { return true; } 2093 static bool classof(const EnumType *) { return true; } 2094}; 2095 2096/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 2097/// to detect TagType objects of structs/unions/classes. 2098class RecordType : public TagType { 2099protected: 2100 explicit RecordType(RecordDecl *D) 2101 : TagType(Record, reinterpret_cast<TagDecl*>(D), QualType()) { } 2102 explicit RecordType(TypeClass TC, RecordDecl *D) 2103 : TagType(TC, reinterpret_cast<TagDecl*>(D), QualType()) { } 2104 friend class ASTContext; // ASTContext creates these. 2105public: 2106 2107 RecordDecl *getDecl() const { 2108 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 2109 } 2110 2111 // FIXME: This predicate is a helper to QualType/Type. It needs to 2112 // recursively check all fields for const-ness. If any field is declared 2113 // const, it needs to return false. 2114 bool hasConstFields() const { return false; } 2115 2116 // FIXME: RecordType needs to check when it is created that all fields are in 2117 // the same address space, and return that. 2118 unsigned getAddressSpace() const { return 0; } 2119 2120 bool isSugared() const { return false; } 2121 QualType desugar() const { return QualType(this, 0); } 2122 2123 static bool classof(const TagType *T); 2124 static bool classof(const Type *T) { 2125 return isa<TagType>(T) && classof(cast<TagType>(T)); 2126 } 2127 static bool classof(const RecordType *) { return true; } 2128}; 2129 2130/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 2131/// to detect TagType objects of enums. 2132class EnumType : public TagType { 2133 explicit EnumType(EnumDecl *D) 2134 : TagType(Enum, reinterpret_cast<TagDecl*>(D), QualType()) { } 2135 friend class ASTContext; // ASTContext creates these. 2136public: 2137 2138 EnumDecl *getDecl() const { 2139 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 2140 } 2141 2142 bool isSugared() const { return false; } 2143 QualType desugar() const { return QualType(this, 0); } 2144 2145 static bool classof(const TagType *T); 2146 static bool classof(const Type *T) { 2147 return isa<TagType>(T) && classof(cast<TagType>(T)); 2148 } 2149 static bool classof(const EnumType *) { return true; } 2150}; 2151 2152/// ElaboratedType - A non-canonical type used to represents uses of 2153/// elaborated type specifiers in C++. For example: 2154/// 2155/// void foo(union MyUnion); 2156/// ^^^^^^^^^^^^^ 2157/// 2158/// At the moment, for efficiency we do not create elaborated types in 2159/// C, since outside of typedefs all references to structs would 2160/// necessarily be elaborated. 2161class ElaboratedType : public Type, public llvm::FoldingSetNode { 2162public: 2163 enum TagKind { 2164 TK_struct, 2165 TK_union, 2166 TK_class, 2167 TK_enum 2168 }; 2169 2170private: 2171 /// The tag that was used in this elaborated type specifier. 2172 TagKind Tag; 2173 2174 /// The underlying type. 2175 QualType UnderlyingType; 2176 2177 explicit ElaboratedType(QualType Ty, TagKind Tag, QualType Canon) 2178 : Type(Elaborated, Canon, Canon->isDependentType()), 2179 Tag(Tag), UnderlyingType(Ty) { } 2180 friend class ASTContext; // ASTContext creates these. 2181 2182public: 2183 TagKind getTagKind() const { return Tag; } 2184 QualType getUnderlyingType() const { return UnderlyingType; } 2185 2186 /// \brief Remove a single level of sugar. 2187 QualType desugar() const { return getUnderlyingType(); } 2188 2189 /// \brief Returns whether this type directly provides sugar. 2190 bool isSugared() const { return true; } 2191 2192 static const char *getNameForTagKind(TagKind Kind) { 2193 switch (Kind) { 2194 default: assert(0 && "Unknown TagKind!"); 2195 case TK_struct: return "struct"; 2196 case TK_union: return "union"; 2197 case TK_class: return "class"; 2198 case TK_enum: return "enum"; 2199 } 2200 } 2201 2202 void Profile(llvm::FoldingSetNodeID &ID) { 2203 Profile(ID, getUnderlyingType(), getTagKind()); 2204 } 2205 static void Profile(llvm::FoldingSetNodeID &ID, QualType T, TagKind Tag) { 2206 ID.AddPointer(T.getAsOpaquePtr()); 2207 ID.AddInteger(Tag); 2208 } 2209 2210 static bool classof(const ElaboratedType*) { return true; } 2211 static bool classof(const Type *T) { return T->getTypeClass() == Elaborated; } 2212}; 2213 2214class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2215 unsigned Depth : 15; 2216 unsigned Index : 16; 2217 unsigned ParameterPack : 1; 2218 IdentifierInfo *Name; 2219 2220 TemplateTypeParmType(unsigned D, unsigned I, bool PP, IdentifierInfo *N, 2221 QualType Canon) 2222 : Type(TemplateTypeParm, Canon, /*Dependent=*/true), 2223 Depth(D), Index(I), ParameterPack(PP), Name(N) { } 2224 2225 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 2226 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true), 2227 Depth(D), Index(I), ParameterPack(PP), Name(0) { } 2228 2229 friend class ASTContext; // ASTContext creates these 2230 2231public: 2232 unsigned getDepth() const { return Depth; } 2233 unsigned getIndex() const { return Index; } 2234 bool isParameterPack() const { return ParameterPack; } 2235 IdentifierInfo *getName() const { return Name; } 2236 2237 bool isSugared() const { return false; } 2238 QualType desugar() const { return QualType(this, 0); } 2239 2240 void Profile(llvm::FoldingSetNodeID &ID) { 2241 Profile(ID, Depth, Index, ParameterPack, Name); 2242 } 2243 2244 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 2245 unsigned Index, bool ParameterPack, 2246 IdentifierInfo *Name) { 2247 ID.AddInteger(Depth); 2248 ID.AddInteger(Index); 2249 ID.AddBoolean(ParameterPack); 2250 ID.AddPointer(Name); 2251 } 2252 2253 static bool classof(const Type *T) { 2254 return T->getTypeClass() == TemplateTypeParm; 2255 } 2256 static bool classof(const TemplateTypeParmType *T) { return true; } 2257}; 2258 2259/// \brief Represents the result of substituting a type for a template 2260/// type parameter. 2261/// 2262/// Within an instantiated template, all template type parameters have 2263/// been replaced with these. They are used solely to record that a 2264/// type was originally written as a template type parameter; 2265/// therefore they are never canonical. 2266class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2267 // The original type parameter. 2268 const TemplateTypeParmType *Replaced; 2269 2270 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 2271 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType()), 2272 Replaced(Param) { } 2273 2274 friend class ASTContext; 2275 2276public: 2277 IdentifierInfo *getName() const { return Replaced->getName(); } 2278 2279 /// Gets the template parameter that was substituted for. 2280 const TemplateTypeParmType *getReplacedParameter() const { 2281 return Replaced; 2282 } 2283 2284 /// Gets the type that was substituted for the template 2285 /// parameter. 2286 QualType getReplacementType() const { 2287 return getCanonicalTypeInternal(); 2288 } 2289 2290 bool isSugared() const { return true; } 2291 QualType desugar() const { return getReplacementType(); } 2292 2293 void Profile(llvm::FoldingSetNodeID &ID) { 2294 Profile(ID, getReplacedParameter(), getReplacementType()); 2295 } 2296 static void Profile(llvm::FoldingSetNodeID &ID, 2297 const TemplateTypeParmType *Replaced, 2298 QualType Replacement) { 2299 ID.AddPointer(Replaced); 2300 ID.AddPointer(Replacement.getAsOpaquePtr()); 2301 } 2302 2303 static bool classof(const Type *T) { 2304 return T->getTypeClass() == SubstTemplateTypeParm; 2305 } 2306 static bool classof(const SubstTemplateTypeParmType *T) { return true; } 2307}; 2308 2309/// \brief Represents the type of a template specialization as written 2310/// in the source code. 2311/// 2312/// Template specialization types represent the syntactic form of a 2313/// template-id that refers to a type, e.g., @c vector<int>. Some 2314/// template specialization types are syntactic sugar, whose canonical 2315/// type will point to some other type node that represents the 2316/// instantiation or class template specialization. For example, a 2317/// class template specialization type of @c vector<int> will refer to 2318/// a tag type for the instantiation 2319/// @c std::vector<int, std::allocator<int>>. 2320/// 2321/// Other template specialization types, for which the template name 2322/// is dependent, may be canonical types. These types are always 2323/// dependent. 2324class TemplateSpecializationType 2325 : public Type, public llvm::FoldingSetNode { 2326 2327 // FIXME: Currently needed for profiling expressions; can we avoid this? 2328 ASTContext &Context; 2329 2330 /// \brief The name of the template being specialized. 2331 TemplateName Template; 2332 2333 /// \brief - The number of template arguments named in this class 2334 /// template specialization. 2335 unsigned NumArgs; 2336 2337 TemplateSpecializationType(ASTContext &Context, 2338 TemplateName T, 2339 const TemplateArgument *Args, 2340 unsigned NumArgs, QualType Canon); 2341 2342 virtual void Destroy(ASTContext& C); 2343 2344 friend class ASTContext; // ASTContext creates these 2345 2346public: 2347 /// \brief Determine whether any of the given template arguments are 2348 /// dependent. 2349 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 2350 unsigned NumArgs); 2351 2352 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 2353 unsigned NumArgs); 2354 2355 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &); 2356 2357 /// \brief Print a template argument list, including the '<' and '>' 2358 /// enclosing the template arguments. 2359 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 2360 unsigned NumArgs, 2361 const PrintingPolicy &Policy); 2362 2363 static std::string PrintTemplateArgumentList(const TemplateArgumentLoc *Args, 2364 unsigned NumArgs, 2365 const PrintingPolicy &Policy); 2366 2367 static std::string PrintTemplateArgumentList(const TemplateArgumentListInfo &, 2368 const PrintingPolicy &Policy); 2369 2370 typedef const TemplateArgument * iterator; 2371 2372 iterator begin() const { return getArgs(); } 2373 iterator end() const; 2374 2375 /// \brief Retrieve the name of the template that we are specializing. 2376 TemplateName getTemplateName() const { return Template; } 2377 2378 /// \brief Retrieve the template arguments. 2379 const TemplateArgument *getArgs() const { 2380 return reinterpret_cast<const TemplateArgument *>(this + 1); 2381 } 2382 2383 /// \brief Retrieve the number of template arguments. 2384 unsigned getNumArgs() const { return NumArgs; } 2385 2386 /// \brief Retrieve a specific template argument as a type. 2387 /// \precondition @c isArgType(Arg) 2388 const TemplateArgument &getArg(unsigned Idx) const; 2389 2390 bool isSugared() const { return !isDependentType(); } 2391 QualType desugar() const { return getCanonicalTypeInternal(); } 2392 2393 void Profile(llvm::FoldingSetNodeID &ID) { 2394 Profile(ID, Template, getArgs(), NumArgs, Context); 2395 } 2396 2397 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 2398 const TemplateArgument *Args, unsigned NumArgs, 2399 ASTContext &Context); 2400 2401 static bool classof(const Type *T) { 2402 return T->getTypeClass() == TemplateSpecialization; 2403 } 2404 static bool classof(const TemplateSpecializationType *T) { return true; } 2405}; 2406 2407/// \brief Represents a type that was referred to via a qualified 2408/// name, e.g., N::M::type. 2409/// 2410/// This type is used to keep track of a type name as written in the 2411/// source code, including any nested-name-specifiers. The type itself 2412/// is always "sugar", used to express what was written in the source 2413/// code but containing no additional semantic information. 2414class QualifiedNameType : public Type, public llvm::FoldingSetNode { 2415 /// \brief The nested name specifier containing the qualifier. 2416 NestedNameSpecifier *NNS; 2417 2418 /// \brief The type that this qualified name refers to. 2419 QualType NamedType; 2420 2421 QualifiedNameType(NestedNameSpecifier *NNS, QualType NamedType, 2422 QualType CanonType) 2423 : Type(QualifiedName, CanonType, NamedType->isDependentType()), 2424 NNS(NNS), NamedType(NamedType) { } 2425 2426 friend class ASTContext; // ASTContext creates these 2427 2428public: 2429 /// \brief Retrieve the qualification on this type. 2430 NestedNameSpecifier *getQualifier() const { return NNS; } 2431 2432 /// \brief Retrieve the type named by the qualified-id. 2433 QualType getNamedType() const { return NamedType; } 2434 2435 /// \brief Remove a single level of sugar. 2436 QualType desugar() const { return getNamedType(); } 2437 2438 /// \brief Returns whether this type directly provides sugar. 2439 bool isSugared() const { return true; } 2440 2441 void Profile(llvm::FoldingSetNodeID &ID) { 2442 Profile(ID, NNS, NamedType); 2443 } 2444 2445 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 2446 QualType NamedType) { 2447 ID.AddPointer(NNS); 2448 NamedType.Profile(ID); 2449 } 2450 2451 static bool classof(const Type *T) { 2452 return T->getTypeClass() == QualifiedName; 2453 } 2454 static bool classof(const QualifiedNameType *T) { return true; } 2455}; 2456 2457/// \brief Represents a 'typename' specifier that names a type within 2458/// a dependent type, e.g., "typename T::type". 2459/// 2460/// TypenameType has a very similar structure to QualifiedNameType, 2461/// which also involves a nested-name-specifier following by a type, 2462/// and (FIXME!) both can even be prefixed by the 'typename' 2463/// keyword. However, the two types serve very different roles: 2464/// QualifiedNameType is a non-semantic type that serves only as sugar 2465/// to show how a particular type was written in the source 2466/// code. TypenameType, on the other hand, only occurs when the 2467/// nested-name-specifier is dependent, such that we cannot resolve 2468/// the actual type until after instantiation. 2469class TypenameType : public Type, public llvm::FoldingSetNode { 2470 /// \brief The nested name specifier containing the qualifier. 2471 NestedNameSpecifier *NNS; 2472 2473 typedef llvm::PointerUnion<const IdentifierInfo *, 2474 const TemplateSpecializationType *> NameType; 2475 2476 /// \brief The type that this typename specifier refers to. 2477 NameType Name; 2478 2479 TypenameType(NestedNameSpecifier *NNS, const IdentifierInfo *Name, 2480 QualType CanonType) 2481 : Type(Typename, CanonType, true), NNS(NNS), Name(Name) { 2482 assert(NNS->isDependent() && 2483 "TypenameType requires a dependent nested-name-specifier"); 2484 } 2485 2486 TypenameType(NestedNameSpecifier *NNS, const TemplateSpecializationType *Ty, 2487 QualType CanonType) 2488 : Type(Typename, CanonType, true), NNS(NNS), Name(Ty) { 2489 assert(NNS->isDependent() && 2490 "TypenameType requires a dependent nested-name-specifier"); 2491 } 2492 2493 friend class ASTContext; // ASTContext creates these 2494 2495public: 2496 /// \brief Retrieve the qualification on this type. 2497 NestedNameSpecifier *getQualifier() const { return NNS; } 2498 2499 /// \brief Retrieve the type named by the typename specifier as an 2500 /// identifier. 2501 /// 2502 /// This routine will return a non-NULL identifier pointer when the 2503 /// form of the original typename was terminated by an identifier, 2504 /// e.g., "typename T::type". 2505 const IdentifierInfo *getIdentifier() const { 2506 return Name.dyn_cast<const IdentifierInfo *>(); 2507 } 2508 2509 /// \brief Retrieve the type named by the typename specifier as a 2510 /// type specialization. 2511 const TemplateSpecializationType *getTemplateId() const { 2512 return Name.dyn_cast<const TemplateSpecializationType *>(); 2513 } 2514 2515 bool isSugared() const { return false; } 2516 QualType desugar() const { return QualType(this, 0); } 2517 2518 void Profile(llvm::FoldingSetNodeID &ID) { 2519 Profile(ID, NNS, Name); 2520 } 2521 2522 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 2523 NameType Name) { 2524 ID.AddPointer(NNS); 2525 ID.AddPointer(Name.getOpaqueValue()); 2526 } 2527 2528 static bool classof(const Type *T) { 2529 return T->getTypeClass() == Typename; 2530 } 2531 static bool classof(const TypenameType *T) { return true; } 2532}; 2533 2534/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 2535/// object oriented design. They basically correspond to C++ classes. There 2536/// are two kinds of interface types, normal interfaces like "NSString" and 2537/// qualified interfaces, which are qualified with a protocol list like 2538/// "NSString<NSCopyable, NSAmazing>". 2539class ObjCInterfaceType : public Type, public llvm::FoldingSetNode { 2540 ObjCInterfaceDecl *Decl; 2541 2542 // List of protocols for this protocol conforming object type 2543 // List is sorted on protocol name. No protocol is enterred more than once. 2544 ObjCProtocolDecl **Protocols; 2545 unsigned NumProtocols; 2546 2547 ObjCInterfaceType(ASTContext &Ctx, QualType Canonical, ObjCInterfaceDecl *D, 2548 ObjCProtocolDecl **Protos, unsigned NumP); 2549 friend class ASTContext; // ASTContext creates these. 2550public: 2551 void Destroy(ASTContext& C); 2552 2553 ObjCInterfaceDecl *getDecl() const { return Decl; } 2554 2555 /// getNumProtocols - Return the number of qualifying protocols in this 2556 /// interface type, or 0 if there are none. 2557 unsigned getNumProtocols() const { return NumProtocols; } 2558 2559 /// qual_iterator and friends: this provides access to the (potentially empty) 2560 /// list of protocols qualifying this interface. 2561 typedef ObjCProtocolDecl* const * qual_iterator; 2562 qual_iterator qual_begin() const { 2563 return Protocols; 2564 } 2565 qual_iterator qual_end() const { 2566 return Protocols ? Protocols + NumProtocols : 0; 2567 } 2568 bool qual_empty() const { return NumProtocols == 0; } 2569 2570 bool isSugared() const { return false; } 2571 QualType desugar() const { return QualType(this, 0); } 2572 2573 void Profile(llvm::FoldingSetNodeID &ID); 2574 static void Profile(llvm::FoldingSetNodeID &ID, 2575 const ObjCInterfaceDecl *Decl, 2576 ObjCProtocolDecl **protocols, unsigned NumProtocols); 2577 2578 virtual Linkage getLinkage() const; 2579 2580 static bool classof(const Type *T) { 2581 return T->getTypeClass() == ObjCInterface; 2582 } 2583 static bool classof(const ObjCInterfaceType *) { return true; } 2584}; 2585 2586/// ObjCObjectPointerType - Used to represent 'id', 'Interface *', 'id <p>', 2587/// and 'Interface <p> *'. 2588/// 2589/// Duplicate protocols are removed and protocol list is canonicalized to be in 2590/// alphabetical order. 2591class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 2592 QualType PointeeType; // A builtin or interface type. 2593 2594 // List of protocols for this protocol conforming object type 2595 // List is sorted on protocol name. No protocol is entered more than once. 2596 ObjCProtocolDecl **Protocols; 2597 unsigned NumProtocols; 2598 2599 ObjCObjectPointerType(ASTContext &Ctx, QualType Canonical, QualType T, 2600 ObjCProtocolDecl **Protos, unsigned NumP); 2601 friend class ASTContext; // ASTContext creates these. 2602 2603public: 2604 void Destroy(ASTContext& C); 2605 2606 // Get the pointee type. Pointee will either be: 2607 // - a built-in type (for 'id' and 'Class'). 2608 // - an interface type (for user-defined types). 2609 // - a TypedefType whose canonical type is an interface (as in 'T' below). 2610 // For example: typedef NSObject T; T *var; 2611 QualType getPointeeType() const { return PointeeType; } 2612 2613 const ObjCInterfaceType *getInterfaceType() const { 2614 return PointeeType->getAs<ObjCInterfaceType>(); 2615 } 2616 /// getInterfaceDecl - returns an interface decl for user-defined types. 2617 ObjCInterfaceDecl *getInterfaceDecl() const { 2618 return getInterfaceType() ? getInterfaceType()->getDecl() : 0; 2619 } 2620 /// isObjCIdType - true for "id". 2621 bool isObjCIdType() const { 2622 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCId) && 2623 !NumProtocols; 2624 } 2625 /// isObjCClassType - true for "Class". 2626 bool isObjCClassType() const { 2627 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCClass) && 2628 !NumProtocols; 2629 } 2630 2631 /// isObjCQualifiedIdType - true for "id <p>". 2632 bool isObjCQualifiedIdType() const { 2633 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCId) && 2634 NumProtocols; 2635 } 2636 /// isObjCQualifiedClassType - true for "Class <p>". 2637 bool isObjCQualifiedClassType() const { 2638 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCClass) && 2639 NumProtocols; 2640 } 2641 /// qual_iterator and friends: this provides access to the (potentially empty) 2642 /// list of protocols qualifying this interface. 2643 typedef ObjCProtocolDecl* const * qual_iterator; 2644 2645 qual_iterator qual_begin() const { 2646 return Protocols; 2647 } 2648 qual_iterator qual_end() const { 2649 return Protocols ? Protocols + NumProtocols : NULL; 2650 } 2651 bool qual_empty() const { return NumProtocols == 0; } 2652 2653 /// getNumProtocols - Return the number of qualifying protocols in this 2654 /// interface type, or 0 if there are none. 2655 unsigned getNumProtocols() const { return NumProtocols; } 2656 2657 bool isSugared() const { return false; } 2658 QualType desugar() const { return QualType(this, 0); } 2659 2660 virtual Linkage getLinkage() const; 2661 2662 void Profile(llvm::FoldingSetNodeID &ID); 2663 static void Profile(llvm::FoldingSetNodeID &ID, QualType T, 2664 ObjCProtocolDecl **protocols, unsigned NumProtocols); 2665 static bool classof(const Type *T) { 2666 return T->getTypeClass() == ObjCObjectPointer; 2667 } 2668 static bool classof(const ObjCObjectPointerType *) { return true; } 2669}; 2670 2671/// A qualifier set is used to build a set of qualifiers. 2672class QualifierCollector : public Qualifiers { 2673 ASTContext *Context; 2674 2675public: 2676 QualifierCollector(Qualifiers Qs = Qualifiers()) 2677 : Qualifiers(Qs), Context(0) {} 2678 QualifierCollector(ASTContext &Context, Qualifiers Qs = Qualifiers()) 2679 : Qualifiers(Qs), Context(&Context) {} 2680 2681 void setContext(ASTContext &C) { Context = &C; } 2682 2683 /// Collect any qualifiers on the given type and return an 2684 /// unqualified type. 2685 const Type *strip(QualType QT) { 2686 addFastQualifiers(QT.getLocalFastQualifiers()); 2687 if (QT.hasLocalNonFastQualifiers()) { 2688 const ExtQuals *EQ = QT.getExtQualsUnsafe(); 2689 Context = &EQ->getContext(); 2690 addQualifiers(EQ->getQualifiers()); 2691 return EQ->getBaseType(); 2692 } 2693 return QT.getTypePtrUnsafe(); 2694 } 2695 2696 /// Apply the collected qualifiers to the given type. 2697 QualType apply(QualType QT) const; 2698 2699 /// Apply the collected qualifiers to the given type. 2700 QualType apply(const Type* T) const; 2701 2702}; 2703 2704 2705// Inline function definitions. 2706 2707inline bool QualType::isCanonical() const { 2708 const Type *T = getTypePtr(); 2709 if (hasLocalQualifiers()) 2710 return T->isCanonicalUnqualified() && !isa<ArrayType>(T); 2711 return T->isCanonicalUnqualified(); 2712} 2713 2714inline bool QualType::isCanonicalAsParam() const { 2715 if (hasLocalQualifiers()) return false; 2716 const Type *T = getTypePtr(); 2717 return T->isCanonicalUnqualified() && 2718 !isa<FunctionType>(T) && !isa<ArrayType>(T); 2719} 2720 2721inline bool QualType::isConstQualified() const { 2722 return isLocalConstQualified() || 2723 getTypePtr()->getCanonicalTypeInternal().isLocalConstQualified(); 2724} 2725 2726inline bool QualType::isRestrictQualified() const { 2727 return isLocalRestrictQualified() || 2728 getTypePtr()->getCanonicalTypeInternal().isLocalRestrictQualified(); 2729} 2730 2731 2732inline bool QualType::isVolatileQualified() const { 2733 return isLocalVolatileQualified() || 2734 getTypePtr()->getCanonicalTypeInternal().isLocalVolatileQualified(); 2735} 2736 2737inline bool QualType::hasQualifiers() const { 2738 return hasLocalQualifiers() || 2739 getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers(); 2740} 2741 2742inline Qualifiers QualType::getQualifiers() const { 2743 Qualifiers Quals = getLocalQualifiers(); 2744 Quals.addQualifiers( 2745 getTypePtr()->getCanonicalTypeInternal().getLocalQualifiers()); 2746 return Quals; 2747} 2748 2749inline unsigned QualType::getCVRQualifiers() const { 2750 return getLocalCVRQualifiers() | 2751 getTypePtr()->getCanonicalTypeInternal().getLocalCVRQualifiers(); 2752} 2753 2754/// getCVRQualifiersThroughArrayTypes - If there are CVR qualifiers for this 2755/// type, returns them. Otherwise, if this is an array type, recurses 2756/// on the element type until some qualifiers have been found or a non-array 2757/// type reached. 2758inline unsigned QualType::getCVRQualifiersThroughArrayTypes() const { 2759 if (unsigned Quals = getCVRQualifiers()) 2760 return Quals; 2761 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2762 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 2763 return AT->getElementType().getCVRQualifiersThroughArrayTypes(); 2764 return 0; 2765} 2766 2767inline void QualType::removeConst() { 2768 removeFastQualifiers(Qualifiers::Const); 2769} 2770 2771inline void QualType::removeRestrict() { 2772 removeFastQualifiers(Qualifiers::Restrict); 2773} 2774 2775inline void QualType::removeVolatile() { 2776 QualifierCollector Qc; 2777 const Type *Ty = Qc.strip(*this); 2778 if (Qc.hasVolatile()) { 2779 Qc.removeVolatile(); 2780 *this = Qc.apply(Ty); 2781 } 2782} 2783 2784inline void QualType::removeCVRQualifiers(unsigned Mask) { 2785 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 2786 2787 // Fast path: we don't need to touch the slow qualifiers. 2788 if (!(Mask & ~Qualifiers::FastMask)) { 2789 removeFastQualifiers(Mask); 2790 return; 2791 } 2792 2793 QualifierCollector Qc; 2794 const Type *Ty = Qc.strip(*this); 2795 Qc.removeCVRQualifiers(Mask); 2796 *this = Qc.apply(Ty); 2797} 2798 2799/// getAddressSpace - Return the address space of this type. 2800inline unsigned QualType::getAddressSpace() const { 2801 if (hasLocalNonFastQualifiers()) { 2802 const ExtQuals *EQ = getExtQualsUnsafe(); 2803 if (EQ->hasAddressSpace()) 2804 return EQ->getAddressSpace(); 2805 } 2806 2807 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2808 if (CT.hasLocalNonFastQualifiers()) { 2809 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 2810 if (EQ->hasAddressSpace()) 2811 return EQ->getAddressSpace(); 2812 } 2813 2814 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 2815 return AT->getElementType().getAddressSpace(); 2816 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 2817 return RT->getAddressSpace(); 2818 return 0; 2819} 2820 2821/// getObjCGCAttr - Return the gc attribute of this type. 2822inline Qualifiers::GC QualType::getObjCGCAttr() const { 2823 if (hasLocalNonFastQualifiers()) { 2824 const ExtQuals *EQ = getExtQualsUnsafe(); 2825 if (EQ->hasObjCGCAttr()) 2826 return EQ->getObjCGCAttr(); 2827 } 2828 2829 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2830 if (CT.hasLocalNonFastQualifiers()) { 2831 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 2832 if (EQ->hasObjCGCAttr()) 2833 return EQ->getObjCGCAttr(); 2834 } 2835 2836 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 2837 return AT->getElementType().getObjCGCAttr(); 2838 if (const ObjCObjectPointerType *PT = CT->getAs<ObjCObjectPointerType>()) 2839 return PT->getPointeeType().getObjCGCAttr(); 2840 // We most look at all pointer types, not just pointer to interface types. 2841 if (const PointerType *PT = CT->getAs<PointerType>()) 2842 return PT->getPointeeType().getObjCGCAttr(); 2843 return Qualifiers::GCNone; 2844} 2845 2846 /// getNoReturnAttr - Returns true if the type has the noreturn attribute, 2847 /// false otherwise. 2848inline bool QualType::getNoReturnAttr() const { 2849 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2850 if (const PointerType *PT = getTypePtr()->getAs<PointerType>()) { 2851 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 2852 return FT->getNoReturnAttr(); 2853 } else if (const FunctionType *FT = getTypePtr()->getAs<FunctionType>()) 2854 return FT->getNoReturnAttr(); 2855 2856 return false; 2857} 2858 2859/// getCallConv - Returns the calling convention of the type if the type 2860/// is a function type, CC_Default otherwise. 2861inline CallingConv QualType::getCallConv() const { 2862 if (const PointerType *PT = getTypePtr()->getAs<PointerType>()) 2863 return PT->getPointeeType().getCallConv(); 2864 else if (const ReferenceType *RT = getTypePtr()->getAs<ReferenceType>()) 2865 return RT->getPointeeType().getCallConv(); 2866 else if (const MemberPointerType *MPT = 2867 getTypePtr()->getAs<MemberPointerType>()) 2868 return MPT->getPointeeType().getCallConv(); 2869 else if (const BlockPointerType *BPT = 2870 getTypePtr()->getAs<BlockPointerType>()) { 2871 if (const FunctionType *FT = BPT->getPointeeType()->getAs<FunctionType>()) 2872 return FT->getCallConv(); 2873 } else if (const FunctionType *FT = getTypePtr()->getAs<FunctionType>()) 2874 return FT->getCallConv(); 2875 2876 return CC_Default; 2877} 2878 2879/// isMoreQualifiedThan - Determine whether this type is more 2880/// qualified than the Other type. For example, "const volatile int" 2881/// is more qualified than "const int", "volatile int", and 2882/// "int". However, it is not more qualified than "const volatile 2883/// int". 2884inline bool QualType::isMoreQualifiedThan(QualType Other) const { 2885 // FIXME: work on arbitrary qualifiers 2886 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 2887 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 2888 if (getAddressSpace() != Other.getAddressSpace()) 2889 return false; 2890 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 2891} 2892 2893/// isAtLeastAsQualifiedAs - Determine whether this type is at last 2894/// as qualified as the Other type. For example, "const volatile 2895/// int" is at least as qualified as "const int", "volatile int", 2896/// "int", and "const volatile int". 2897inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 2898 // FIXME: work on arbitrary qualifiers 2899 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 2900 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 2901 if (getAddressSpace() != Other.getAddressSpace()) 2902 return false; 2903 return (MyQuals | OtherQuals) == MyQuals; 2904} 2905 2906/// getNonReferenceType - If Type is a reference type (e.g., const 2907/// int&), returns the type that the reference refers to ("const 2908/// int"). Otherwise, returns the type itself. This routine is used 2909/// throughout Sema to implement C++ 5p6: 2910/// 2911/// If an expression initially has the type "reference to T" (8.3.2, 2912/// 8.5.3), the type is adjusted to "T" prior to any further 2913/// analysis, the expression designates the object or function 2914/// denoted by the reference, and the expression is an lvalue. 2915inline QualType QualType::getNonReferenceType() const { 2916 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 2917 return RefType->getPointeeType(); 2918 else 2919 return *this; 2920} 2921 2922inline const ObjCInterfaceType *Type::getAsPointerToObjCInterfaceType() const { 2923 if (const PointerType *PT = getAs<PointerType>()) 2924 return PT->getPointeeType()->getAs<ObjCInterfaceType>(); 2925 return 0; 2926} 2927 2928inline bool Type::isFunctionType() const { 2929 return isa<FunctionType>(CanonicalType); 2930} 2931inline bool Type::isPointerType() const { 2932 return isa<PointerType>(CanonicalType); 2933} 2934inline bool Type::isAnyPointerType() const { 2935 return isPointerType() || isObjCObjectPointerType(); 2936} 2937inline bool Type::isBlockPointerType() const { 2938 return isa<BlockPointerType>(CanonicalType); 2939} 2940inline bool Type::isReferenceType() const { 2941 return isa<ReferenceType>(CanonicalType); 2942} 2943inline bool Type::isLValueReferenceType() const { 2944 return isa<LValueReferenceType>(CanonicalType); 2945} 2946inline bool Type::isRValueReferenceType() const { 2947 return isa<RValueReferenceType>(CanonicalType); 2948} 2949inline bool Type::isFunctionPointerType() const { 2950 if (const PointerType* T = getAs<PointerType>()) 2951 return T->getPointeeType()->isFunctionType(); 2952 else 2953 return false; 2954} 2955inline bool Type::isMemberPointerType() const { 2956 return isa<MemberPointerType>(CanonicalType); 2957} 2958inline bool Type::isMemberFunctionPointerType() const { 2959 if (const MemberPointerType* T = getAs<MemberPointerType>()) 2960 return T->getPointeeType()->isFunctionType(); 2961 else 2962 return false; 2963} 2964inline bool Type::isArrayType() const { 2965 return isa<ArrayType>(CanonicalType); 2966} 2967inline bool Type::isConstantArrayType() const { 2968 return isa<ConstantArrayType>(CanonicalType); 2969} 2970inline bool Type::isIncompleteArrayType() const { 2971 return isa<IncompleteArrayType>(CanonicalType); 2972} 2973inline bool Type::isVariableArrayType() const { 2974 return isa<VariableArrayType>(CanonicalType); 2975} 2976inline bool Type::isDependentSizedArrayType() const { 2977 return isa<DependentSizedArrayType>(CanonicalType); 2978} 2979inline bool Type::isRecordType() const { 2980 return isa<RecordType>(CanonicalType); 2981} 2982inline bool Type::isAnyComplexType() const { 2983 return isa<ComplexType>(CanonicalType); 2984} 2985inline bool Type::isVectorType() const { 2986 return isa<VectorType>(CanonicalType); 2987} 2988inline bool Type::isExtVectorType() const { 2989 return isa<ExtVectorType>(CanonicalType); 2990} 2991inline bool Type::isObjCObjectPointerType() const { 2992 return isa<ObjCObjectPointerType>(CanonicalType); 2993} 2994inline bool Type::isObjCInterfaceType() const { 2995 return isa<ObjCInterfaceType>(CanonicalType); 2996} 2997inline bool Type::isObjCQualifiedIdType() const { 2998 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 2999 return OPT->isObjCQualifiedIdType(); 3000 return false; 3001} 3002inline bool Type::isObjCQualifiedClassType() const { 3003 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3004 return OPT->isObjCQualifiedClassType(); 3005 return false; 3006} 3007inline bool Type::isObjCIdType() const { 3008 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3009 return OPT->isObjCIdType(); 3010 return false; 3011} 3012inline bool Type::isObjCClassType() const { 3013 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3014 return OPT->isObjCClassType(); 3015 return false; 3016} 3017inline bool Type::isObjCSelType() const { 3018 if (const PointerType *OPT = getAs<PointerType>()) 3019 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 3020 return false; 3021} 3022inline bool Type::isObjCBuiltinType() const { 3023 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 3024} 3025inline bool Type::isTemplateTypeParmType() const { 3026 return isa<TemplateTypeParmType>(CanonicalType); 3027} 3028 3029inline bool Type::isSpecificBuiltinType(unsigned K) const { 3030 if (const BuiltinType *BT = getAs<BuiltinType>()) 3031 if (BT->getKind() == (BuiltinType::Kind) K) 3032 return true; 3033 return false; 3034} 3035 3036/// \brief Determines whether this is a type for which one can define 3037/// an overloaded operator. 3038inline bool Type::isOverloadableType() const { 3039 return isDependentType() || isRecordType() || isEnumeralType(); 3040} 3041 3042inline bool Type::hasPointerRepresentation() const { 3043 return (isPointerType() || isReferenceType() || isBlockPointerType() || 3044 isObjCInterfaceType() || isObjCObjectPointerType() || 3045 isObjCQualifiedInterfaceType() || isNullPtrType()); 3046} 3047 3048inline bool Type::hasObjCPointerRepresentation() const { 3049 return (isObjCInterfaceType() || isObjCObjectPointerType() || 3050 isObjCQualifiedInterfaceType()); 3051} 3052 3053/// Insertion operator for diagnostics. This allows sending QualType's into a 3054/// diagnostic with <<. 3055inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 3056 QualType T) { 3057 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 3058 Diagnostic::ak_qualtype); 3059 return DB; 3060} 3061 3062// Helper class template that is used by Type::getAs to ensure that one does 3063// not try to look through a qualified type to get to an array type. 3064template<typename T, 3065 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 3066 llvm::is_base_of<ArrayType, T>::value)> 3067struct ArrayType_cannot_be_used_with_getAs { }; 3068 3069template<typename T> 3070struct ArrayType_cannot_be_used_with_getAs<T, true>; 3071 3072/// Member-template getAs<specific type>'. 3073template <typename T> const T *Type::getAs() const { 3074 ArrayType_cannot_be_used_with_getAs<T> at; 3075 (void)at; 3076 3077 // If this is directly a T type, return it. 3078 if (const T *Ty = dyn_cast<T>(this)) 3079 return Ty; 3080 3081 // If the canonical form of this type isn't the right kind, reject it. 3082 if (!isa<T>(CanonicalType)) 3083 return 0; 3084 3085 // If this is a typedef for the type, strip the typedef off without 3086 // losing all typedef information. 3087 return cast<T>(getUnqualifiedDesugaredType()); 3088} 3089 3090} // end namespace clang 3091 3092#endif 3093