Type.h revision 27935ee59c30b0d8b610ab676aab8e65350af932
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 LAST_TYPE(Class) TypeLast = Class, 755#define ABSTRACT_TYPE(Class, Base) 756#include "clang/AST/TypeNodes.def" 757 TagFirst = Record, TagLast = Enum 758 }; 759 760private: 761 QualType CanonicalType; 762 763 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 764 unsigned TC : 8; 765 766 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 767 /// Note that this should stay at the end of the ivars for Type so that 768 /// subclasses can pack their bitfields into the same word. 769 bool Dependent : 1; 770 771 Type(const Type&); // DO NOT IMPLEMENT. 772 void operator=(const Type&); // DO NOT IMPLEMENT. 773protected: 774 // silence VC++ warning C4355: 'this' : used in base member initializer list 775 Type *this_() { return this; } 776 Type(TypeClass tc, QualType Canonical, bool dependent) 777 : CanonicalType(Canonical.isNull() ? QualType(this_(), 0) : Canonical), 778 TC(tc), Dependent(dependent) {} 779 virtual ~Type() {} 780 virtual void Destroy(ASTContext& C); 781 friend class ASTContext; 782 783public: 784 TypeClass getTypeClass() const { return static_cast<TypeClass>(TC); } 785 786 bool isCanonicalUnqualified() const { 787 return CanonicalType.getTypePtr() == this; 788 } 789 790 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 791 /// object types, function types, and incomplete types. 792 793 /// \brief Determines whether the type describes an object in memory. 794 /// 795 /// Note that this definition of object type corresponds to the C++ 796 /// definition of object type, which includes incomplete types, as 797 /// opposed to the C definition (which does not include incomplete 798 /// types). 799 bool isObjectType() const; 800 801 /// isIncompleteType - Return true if this is an incomplete type. 802 /// A type that can describe objects, but which lacks information needed to 803 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 804 /// routine will need to determine if the size is actually required. 805 bool isIncompleteType() const; 806 807 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 808 /// type, in other words, not a function type. 809 bool isIncompleteOrObjectType() const { 810 return !isFunctionType(); 811 } 812 813 /// isPODType - Return true if this is a plain-old-data type (C++ 3.9p10). 814 bool isPODType() const; 815 816 /// isLiteralType - Return true if this is a literal type 817 /// (C++0x [basic.types]p10) 818 bool isLiteralType() const; 819 820 /// isVariablyModifiedType (C99 6.7.5.2p2) - Return true for variable array 821 /// types that have a non-constant expression. This does not include "[]". 822 bool isVariablyModifiedType() const; 823 824 /// Helper methods to distinguish type categories. All type predicates 825 /// operate on the canonical type, ignoring typedefs and qualifiers. 826 827 /// isSpecificBuiltinType - Test for a particular builtin type. 828 bool isSpecificBuiltinType(unsigned K) const; 829 830 /// isIntegerType() does *not* include complex integers (a GCC extension). 831 /// isComplexIntegerType() can be used to test for complex integers. 832 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 833 bool isEnumeralType() const; 834 bool isBooleanType() const; 835 bool isCharType() const; 836 bool isWideCharType() const; 837 bool isAnyCharacterType() const; 838 bool isIntegralType() const; 839 840 /// Floating point categories. 841 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 842 /// isComplexType() does *not* include complex integers (a GCC extension). 843 /// isComplexIntegerType() can be used to test for complex integers. 844 bool isComplexType() const; // C99 6.2.5p11 (complex) 845 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 846 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 847 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 848 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 849 bool isVoidType() const; // C99 6.2.5p19 850 bool isDerivedType() const; // C99 6.2.5p20 851 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 852 bool isAggregateType() const; 853 854 // Type Predicates: Check to see if this type is structurally the specified 855 // type, ignoring typedefs and qualifiers. 856 bool isFunctionType() const; 857 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 858 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 859 bool isPointerType() const; 860 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 861 bool isBlockPointerType() const; 862 bool isVoidPointerType() const; 863 bool isReferenceType() const; 864 bool isLValueReferenceType() const; 865 bool isRValueReferenceType() const; 866 bool isFunctionPointerType() const; 867 bool isMemberPointerType() const; 868 bool isMemberFunctionPointerType() const; 869 bool isArrayType() const; 870 bool isConstantArrayType() const; 871 bool isIncompleteArrayType() const; 872 bool isVariableArrayType() const; 873 bool isDependentSizedArrayType() const; 874 bool isRecordType() const; 875 bool isClassType() const; 876 bool isStructureType() const; 877 bool isUnionType() const; 878 bool isComplexIntegerType() const; // GCC _Complex integer type. 879 bool isVectorType() const; // GCC vector type. 880 bool isExtVectorType() const; // Extended vector type. 881 bool isObjCObjectPointerType() const; // Pointer to *any* ObjC object. 882 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 883 // for the common case. 884 bool isObjCInterfaceType() const; // NSString or NSString<foo> 885 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 886 bool isObjCQualifiedIdType() const; // id<foo> 887 bool isObjCQualifiedClassType() const; // Class<foo> 888 bool isObjCIdType() const; // id 889 bool isObjCClassType() const; // Class 890 bool isObjCSelType() const; // Class 891 bool isObjCBuiltinType() const; // 'id' or 'Class' 892 bool isTemplateTypeParmType() const; // C++ template type parameter 893 bool isNullPtrType() const; // C++0x nullptr_t 894 895 /// isDependentType - Whether this type is a dependent type, meaning 896 /// that its definition somehow depends on a template parameter 897 /// (C++ [temp.dep.type]). 898 bool isDependentType() const { return Dependent; } 899 bool isOverloadableType() const; 900 901 /// hasPointerRepresentation - Whether this type is represented 902 /// natively as a pointer; this includes pointers, references, block 903 /// pointers, and Objective-C interface, qualified id, and qualified 904 /// interface types, as well as nullptr_t. 905 bool hasPointerRepresentation() const; 906 907 /// hasObjCPointerRepresentation - Whether this type can represent 908 /// an objective pointer type for the purpose of GC'ability 909 bool hasObjCPointerRepresentation() const; 910 911 // Type Checking Functions: Check to see if this type is structurally the 912 // specified type, ignoring typedefs and qualifiers, and return a pointer to 913 // the best type we can. 914 const RecordType *getAsStructureType() const; 915 /// NOTE: getAs*ArrayType are methods on ASTContext. 916 const RecordType *getAsUnionType() const; 917 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 918 // The following is a convenience method that returns an ObjCObjectPointerType 919 // for object declared using an interface. 920 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 921 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 922 const ObjCInterfaceType *getAsObjCQualifiedInterfaceType() const; 923 const CXXRecordDecl *getCXXRecordDeclForPointerType() const; 924 925 // Member-template getAs<specific type>'. This scheme will eventually 926 // replace the specific getAsXXXX methods above. 927 // 928 // There are some specializations of this member template listed 929 // immediately following this class. 930 template <typename T> const T *getAs() const; 931 932 /// getAsPointerToObjCInterfaceType - If this is a pointer to an ObjC 933 /// interface, return the interface type, otherwise return null. 934 const ObjCInterfaceType *getAsPointerToObjCInterfaceType() const; 935 936 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 937 /// element type of the array, potentially with type qualifiers missing. 938 /// This method should never be used when type qualifiers are meaningful. 939 const Type *getArrayElementTypeNoTypeQual() const; 940 941 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 942 /// pointer, this returns the respective pointee. 943 QualType getPointeeType() const; 944 945 /// getUnqualifiedDesugaredType() - Return the specified type with 946 /// any "sugar" removed from the type, removing any typedefs, 947 /// typeofs, etc., as well as any qualifiers. 948 const Type *getUnqualifiedDesugaredType() const; 949 950 /// More type predicates useful for type checking/promotion 951 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 952 953 /// isSignedIntegerType - Return true if this is an integer type that is 954 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 955 /// an enum decl which has a signed representation, or a vector of signed 956 /// integer element type. 957 bool isSignedIntegerType() const; 958 959 /// isUnsignedIntegerType - Return true if this is an integer type that is 960 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 961 /// decl which has an unsigned representation, or a vector of unsigned integer 962 /// element type. 963 bool isUnsignedIntegerType() const; 964 965 /// isConstantSizeType - Return true if this is not a variable sized type, 966 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 967 /// incomplete types. 968 bool isConstantSizeType() const; 969 970 /// isSpecifierType - Returns true if this type can be represented by some 971 /// set of type specifiers. 972 bool isSpecifierType() const; 973 974 const char *getTypeClassName() const; 975 976 /// \brief Determine the linkage of this type. 977 virtual Linkage getLinkage() const; 978 979 QualType getCanonicalTypeInternal() const { return CanonicalType; } 980 void dump() const; 981 static bool classof(const Type *) { return true; } 982}; 983 984template <> inline const TypedefType *Type::getAs() const { 985 return dyn_cast<TypedefType>(this); 986} 987 988// We can do canonical leaf types faster, because we don't have to 989// worry about preserving child type decoration. 990#define TYPE(Class, Base) 991#define LEAF_TYPE(Class) \ 992template <> inline const Class##Type *Type::getAs() const { \ 993 return dyn_cast<Class##Type>(CanonicalType); \ 994} 995#include "clang/AST/TypeNodes.def" 996 997 998/// BuiltinType - This class is used for builtin types like 'int'. Builtin 999/// types are always canonical and have a literal name field. 1000class BuiltinType : public Type { 1001public: 1002 enum Kind { 1003 Void, 1004 1005 Bool, // This is bool and/or _Bool. 1006 Char_U, // This is 'char' for targets where char is unsigned. 1007 UChar, // This is explicitly qualified unsigned char. 1008 Char16, // This is 'char16_t' for C++. 1009 Char32, // This is 'char32_t' for C++. 1010 UShort, 1011 UInt, 1012 ULong, 1013 ULongLong, 1014 UInt128, // __uint128_t 1015 1016 Char_S, // This is 'char' for targets where char is signed. 1017 SChar, // This is explicitly qualified signed char. 1018 WChar, // This is 'wchar_t' for C++. 1019 Short, 1020 Int, 1021 Long, 1022 LongLong, 1023 Int128, // __int128_t 1024 1025 Float, Double, LongDouble, 1026 1027 NullPtr, // This is the type of C++0x 'nullptr'. 1028 1029 Overload, // This represents the type of an overloaded function declaration. 1030 Dependent, // This represents the type of a type-dependent expression. 1031 1032 UndeducedAuto, // In C++0x, this represents the type of an auto variable 1033 // that has not been deduced yet. 1034 ObjCId, // This represents the ObjC 'id' type. 1035 ObjCClass, // This represents the ObjC 'Class' type. 1036 ObjCSel // This represents the ObjC 'SEL' type. 1037 }; 1038private: 1039 Kind TypeKind; 1040public: 1041 BuiltinType(Kind K) 1042 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent)), 1043 TypeKind(K) {} 1044 1045 Kind getKind() const { return TypeKind; } 1046 const char *getName(const LangOptions &LO) const; 1047 1048 bool isSugared() const { return false; } 1049 QualType desugar() const { return QualType(this, 0); } 1050 1051 bool isInteger() const { 1052 return TypeKind >= Bool && TypeKind <= Int128; 1053 } 1054 1055 bool isSignedInteger() const { 1056 return TypeKind >= Char_S && TypeKind <= Int128; 1057 } 1058 1059 bool isUnsignedInteger() const { 1060 return TypeKind >= Bool && TypeKind <= UInt128; 1061 } 1062 1063 bool isFloatingPoint() const { 1064 return TypeKind >= Float && TypeKind <= LongDouble; 1065 } 1066 1067 virtual Linkage getLinkage() const; 1068 1069 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1070 static bool classof(const BuiltinType *) { return true; } 1071}; 1072 1073/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1074/// types (_Complex float etc) as well as the GCC integer complex extensions. 1075/// 1076class ComplexType : public Type, public llvm::FoldingSetNode { 1077 QualType ElementType; 1078 ComplexType(QualType Element, QualType CanonicalPtr) : 1079 Type(Complex, CanonicalPtr, Element->isDependentType()), 1080 ElementType(Element) { 1081 } 1082 friend class ASTContext; // ASTContext creates these. 1083public: 1084 QualType getElementType() const { return ElementType; } 1085 1086 bool isSugared() const { return false; } 1087 QualType desugar() const { return QualType(this, 0); } 1088 1089 void Profile(llvm::FoldingSetNodeID &ID) { 1090 Profile(ID, getElementType()); 1091 } 1092 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1093 ID.AddPointer(Element.getAsOpaquePtr()); 1094 } 1095 1096 virtual Linkage getLinkage() const; 1097 1098 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1099 static bool classof(const ComplexType *) { return true; } 1100}; 1101 1102/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1103/// 1104class PointerType : public Type, public llvm::FoldingSetNode { 1105 QualType PointeeType; 1106 1107 PointerType(QualType Pointee, QualType CanonicalPtr) : 1108 Type(Pointer, CanonicalPtr, Pointee->isDependentType()), PointeeType(Pointee) { 1109 } 1110 friend class ASTContext; // ASTContext creates these. 1111public: 1112 1113 QualType getPointeeType() const { return PointeeType; } 1114 1115 bool isSugared() const { return false; } 1116 QualType desugar() const { return QualType(this, 0); } 1117 1118 void Profile(llvm::FoldingSetNodeID &ID) { 1119 Profile(ID, getPointeeType()); 1120 } 1121 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1122 ID.AddPointer(Pointee.getAsOpaquePtr()); 1123 } 1124 1125 virtual Linkage getLinkage() const; 1126 1127 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1128 static bool classof(const PointerType *) { return true; } 1129}; 1130 1131/// BlockPointerType - pointer to a block type. 1132/// This type is to represent types syntactically represented as 1133/// "void (^)(int)", etc. Pointee is required to always be a function type. 1134/// 1135class BlockPointerType : public Type, public llvm::FoldingSetNode { 1136 QualType PointeeType; // Block is some kind of pointer type 1137 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1138 Type(BlockPointer, CanonicalCls, Pointee->isDependentType()), 1139 PointeeType(Pointee) { 1140 } 1141 friend class ASTContext; // ASTContext creates these. 1142public: 1143 1144 // Get the pointee type. Pointee is required to always be a function type. 1145 QualType getPointeeType() const { return PointeeType; } 1146 1147 bool isSugared() const { return false; } 1148 QualType desugar() const { return QualType(this, 0); } 1149 1150 void Profile(llvm::FoldingSetNodeID &ID) { 1151 Profile(ID, getPointeeType()); 1152 } 1153 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1154 ID.AddPointer(Pointee.getAsOpaquePtr()); 1155 } 1156 1157 virtual Linkage getLinkage() const; 1158 1159 static bool classof(const Type *T) { 1160 return T->getTypeClass() == BlockPointer; 1161 } 1162 static bool classof(const BlockPointerType *) { return true; } 1163}; 1164 1165/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 1166/// 1167class ReferenceType : public Type, public llvm::FoldingSetNode { 1168 QualType PointeeType; 1169 1170 /// True if the type was originally spelled with an lvalue sigil. 1171 /// This is never true of rvalue references but can also be false 1172 /// on lvalue references because of C++0x [dcl.typedef]p9, 1173 /// as follows: 1174 /// 1175 /// typedef int &ref; // lvalue, spelled lvalue 1176 /// typedef int &&rvref; // rvalue 1177 /// ref &a; // lvalue, inner ref, spelled lvalue 1178 /// ref &&a; // lvalue, inner ref 1179 /// rvref &a; // lvalue, inner ref, spelled lvalue 1180 /// rvref &&a; // rvalue, inner ref 1181 bool SpelledAsLValue; 1182 1183 /// True if the inner type is a reference type. This only happens 1184 /// in non-canonical forms. 1185 bool InnerRef; 1186 1187protected: 1188 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 1189 bool SpelledAsLValue) : 1190 Type(tc, CanonicalRef, Referencee->isDependentType()), 1191 PointeeType(Referencee), SpelledAsLValue(SpelledAsLValue), 1192 InnerRef(Referencee->isReferenceType()) { 1193 } 1194public: 1195 bool isSpelledAsLValue() const { return SpelledAsLValue; } 1196 1197 QualType getPointeeTypeAsWritten() const { return PointeeType; } 1198 QualType getPointeeType() const { 1199 // FIXME: this might strip inner qualifiers; okay? 1200 const ReferenceType *T = this; 1201 while (T->InnerRef) 1202 T = T->PointeeType->getAs<ReferenceType>(); 1203 return T->PointeeType; 1204 } 1205 1206 void Profile(llvm::FoldingSetNodeID &ID) { 1207 Profile(ID, PointeeType, SpelledAsLValue); 1208 } 1209 static void Profile(llvm::FoldingSetNodeID &ID, 1210 QualType Referencee, 1211 bool SpelledAsLValue) { 1212 ID.AddPointer(Referencee.getAsOpaquePtr()); 1213 ID.AddBoolean(SpelledAsLValue); 1214 } 1215 1216 virtual Linkage getLinkage() const; 1217 1218 static bool classof(const Type *T) { 1219 return T->getTypeClass() == LValueReference || 1220 T->getTypeClass() == RValueReference; 1221 } 1222 static bool classof(const ReferenceType *) { return true; } 1223}; 1224 1225/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 1226/// 1227class LValueReferenceType : public ReferenceType { 1228 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 1229 bool SpelledAsLValue) : 1230 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 1231 {} 1232 friend class ASTContext; // ASTContext creates these 1233public: 1234 bool isSugared() const { return false; } 1235 QualType desugar() const { return QualType(this, 0); } 1236 1237 static bool classof(const Type *T) { 1238 return T->getTypeClass() == LValueReference; 1239 } 1240 static bool classof(const LValueReferenceType *) { return true; } 1241}; 1242 1243/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 1244/// 1245class RValueReferenceType : public ReferenceType { 1246 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 1247 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 1248 } 1249 friend class ASTContext; // ASTContext creates these 1250public: 1251 bool isSugared() const { return false; } 1252 QualType desugar() const { return QualType(this, 0); } 1253 1254 static bool classof(const Type *T) { 1255 return T->getTypeClass() == RValueReference; 1256 } 1257 static bool classof(const RValueReferenceType *) { return true; } 1258}; 1259 1260/// MemberPointerType - C++ 8.3.3 - Pointers to members 1261/// 1262class MemberPointerType : public Type, public llvm::FoldingSetNode { 1263 QualType PointeeType; 1264 /// The class of which the pointee is a member. Must ultimately be a 1265 /// RecordType, but could be a typedef or a template parameter too. 1266 const Type *Class; 1267 1268 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 1269 Type(MemberPointer, CanonicalPtr, 1270 Cls->isDependentType() || Pointee->isDependentType()), 1271 PointeeType(Pointee), Class(Cls) { 1272 } 1273 friend class ASTContext; // ASTContext creates these. 1274public: 1275 1276 QualType getPointeeType() const { return PointeeType; } 1277 1278 const Type *getClass() const { return Class; } 1279 1280 bool isSugared() const { return false; } 1281 QualType desugar() const { return QualType(this, 0); } 1282 1283 void Profile(llvm::FoldingSetNodeID &ID) { 1284 Profile(ID, getPointeeType(), getClass()); 1285 } 1286 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 1287 const Type *Class) { 1288 ID.AddPointer(Pointee.getAsOpaquePtr()); 1289 ID.AddPointer(Class); 1290 } 1291 1292 virtual Linkage getLinkage() const; 1293 1294 static bool classof(const Type *T) { 1295 return T->getTypeClass() == MemberPointer; 1296 } 1297 static bool classof(const MemberPointerType *) { return true; } 1298}; 1299 1300/// ArrayType - C99 6.7.5.2 - Array Declarators. 1301/// 1302class ArrayType : public Type, public llvm::FoldingSetNode { 1303public: 1304 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 1305 /// an array with a static size (e.g. int X[static 4]), or an array 1306 /// with a star size (e.g. int X[*]). 1307 /// 'static' is only allowed on function parameters. 1308 enum ArraySizeModifier { 1309 Normal, Static, Star 1310 }; 1311private: 1312 /// ElementType - The element type of the array. 1313 QualType ElementType; 1314 1315 // NOTE: VC++ treats enums as signed, avoid using the ArraySizeModifier enum 1316 /// NOTE: These fields are packed into the bitfields space in the Type class. 1317 unsigned SizeModifier : 2; 1318 1319 /// IndexTypeQuals - Capture qualifiers in declarations like: 1320 /// 'int X[static restrict 4]'. For function parameters only. 1321 unsigned IndexTypeQuals : 3; 1322 1323protected: 1324 // C++ [temp.dep.type]p1: 1325 // A type is dependent if it is... 1326 // - an array type constructed from any dependent type or whose 1327 // size is specified by a constant expression that is 1328 // value-dependent, 1329 ArrayType(TypeClass tc, QualType et, QualType can, 1330 ArraySizeModifier sm, unsigned tq) 1331 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray), 1332 ElementType(et), SizeModifier(sm), IndexTypeQuals(tq) {} 1333 1334 friend class ASTContext; // ASTContext creates these. 1335public: 1336 QualType getElementType() const { return ElementType; } 1337 ArraySizeModifier getSizeModifier() const { 1338 return ArraySizeModifier(SizeModifier); 1339 } 1340 Qualifiers getIndexTypeQualifiers() const { 1341 return Qualifiers::fromCVRMask(IndexTypeQuals); 1342 } 1343 unsigned getIndexTypeCVRQualifiers() const { return IndexTypeQuals; } 1344 1345 virtual Linkage getLinkage() const; 1346 1347 static bool classof(const Type *T) { 1348 return T->getTypeClass() == ConstantArray || 1349 T->getTypeClass() == VariableArray || 1350 T->getTypeClass() == IncompleteArray || 1351 T->getTypeClass() == DependentSizedArray; 1352 } 1353 static bool classof(const ArrayType *) { return true; } 1354}; 1355 1356/// ConstantArrayType - This class represents the canonical version of 1357/// C arrays with a specified constant size. For example, the canonical 1358/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 1359/// type is 'int' and the size is 404. 1360class ConstantArrayType : public ArrayType { 1361 llvm::APInt Size; // Allows us to unique the type. 1362 1363 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 1364 ArraySizeModifier sm, unsigned tq) 1365 : ArrayType(ConstantArray, et, can, sm, tq), 1366 Size(size) {} 1367protected: 1368 ConstantArrayType(TypeClass tc, QualType et, QualType can, 1369 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 1370 : ArrayType(tc, et, can, sm, tq), Size(size) {} 1371 friend class ASTContext; // ASTContext creates these. 1372public: 1373 const llvm::APInt &getSize() const { return Size; } 1374 bool isSugared() const { return false; } 1375 QualType desugar() const { return QualType(this, 0); } 1376 1377 void Profile(llvm::FoldingSetNodeID &ID) { 1378 Profile(ID, getElementType(), getSize(), 1379 getSizeModifier(), getIndexTypeCVRQualifiers()); 1380 } 1381 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1382 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 1383 unsigned TypeQuals) { 1384 ID.AddPointer(ET.getAsOpaquePtr()); 1385 ID.AddInteger(ArraySize.getZExtValue()); 1386 ID.AddInteger(SizeMod); 1387 ID.AddInteger(TypeQuals); 1388 } 1389 static bool classof(const Type *T) { 1390 return T->getTypeClass() == ConstantArray; 1391 } 1392 static bool classof(const ConstantArrayType *) { return true; } 1393}; 1394 1395/// IncompleteArrayType - This class represents C arrays with an unspecified 1396/// size. For example 'int A[]' has an IncompleteArrayType where the element 1397/// type is 'int' and the size is unspecified. 1398class IncompleteArrayType : public ArrayType { 1399 1400 IncompleteArrayType(QualType et, QualType can, 1401 ArraySizeModifier sm, unsigned tq) 1402 : ArrayType(IncompleteArray, et, can, sm, tq) {} 1403 friend class ASTContext; // ASTContext creates these. 1404public: 1405 bool isSugared() const { return false; } 1406 QualType desugar() const { return QualType(this, 0); } 1407 1408 static bool classof(const Type *T) { 1409 return T->getTypeClass() == IncompleteArray; 1410 } 1411 static bool classof(const IncompleteArrayType *) { return true; } 1412 1413 friend class StmtIteratorBase; 1414 1415 void Profile(llvm::FoldingSetNodeID &ID) { 1416 Profile(ID, getElementType(), getSizeModifier(), 1417 getIndexTypeCVRQualifiers()); 1418 } 1419 1420 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1421 ArraySizeModifier SizeMod, unsigned TypeQuals) { 1422 ID.AddPointer(ET.getAsOpaquePtr()); 1423 ID.AddInteger(SizeMod); 1424 ID.AddInteger(TypeQuals); 1425 } 1426}; 1427 1428/// VariableArrayType - This class represents C arrays with a specified size 1429/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 1430/// Since the size expression is an arbitrary expression, we store it as such. 1431/// 1432/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 1433/// should not be: two lexically equivalent variable array types could mean 1434/// different things, for example, these variables do not have the same type 1435/// dynamically: 1436/// 1437/// void foo(int x) { 1438/// int Y[x]; 1439/// ++x; 1440/// int Z[x]; 1441/// } 1442/// 1443class VariableArrayType : public ArrayType { 1444 /// SizeExpr - An assignment expression. VLA's are only permitted within 1445 /// a function block. 1446 Stmt *SizeExpr; 1447 /// Brackets - The left and right array brackets. 1448 SourceRange Brackets; 1449 1450 VariableArrayType(QualType et, QualType can, Expr *e, 1451 ArraySizeModifier sm, unsigned tq, 1452 SourceRange brackets) 1453 : ArrayType(VariableArray, et, can, sm, tq), 1454 SizeExpr((Stmt*) e), Brackets(brackets) {} 1455 friend class ASTContext; // ASTContext creates these. 1456 virtual void Destroy(ASTContext& C); 1457 1458public: 1459 Expr *getSizeExpr() const { 1460 // We use C-style casts instead of cast<> here because we do not wish 1461 // to have a dependency of Type.h on Stmt.h/Expr.h. 1462 return (Expr*) SizeExpr; 1463 } 1464 SourceRange getBracketsRange() const { return Brackets; } 1465 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1466 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1467 1468 bool isSugared() const { return false; } 1469 QualType desugar() const { return QualType(this, 0); } 1470 1471 static bool classof(const Type *T) { 1472 return T->getTypeClass() == VariableArray; 1473 } 1474 static bool classof(const VariableArrayType *) { return true; } 1475 1476 friend class StmtIteratorBase; 1477 1478 void Profile(llvm::FoldingSetNodeID &ID) { 1479 assert(0 && "Cannnot unique VariableArrayTypes."); 1480 } 1481}; 1482 1483/// DependentSizedArrayType - This type represents an array type in 1484/// C++ whose size is a value-dependent expression. For example: 1485/// 1486/// \code 1487/// template<typename T, int Size> 1488/// class array { 1489/// T data[Size]; 1490/// }; 1491/// \endcode 1492/// 1493/// For these types, we won't actually know what the array bound is 1494/// until template instantiation occurs, at which point this will 1495/// become either a ConstantArrayType or a VariableArrayType. 1496class DependentSizedArrayType : public ArrayType { 1497 ASTContext &Context; 1498 1499 /// \brief An assignment expression that will instantiate to the 1500 /// size of the array. 1501 /// 1502 /// The expression itself might be NULL, in which case the array 1503 /// type will have its size deduced from an initializer. 1504 Stmt *SizeExpr; 1505 1506 /// Brackets - The left and right array brackets. 1507 SourceRange Brackets; 1508 1509 DependentSizedArrayType(ASTContext &Context, QualType et, QualType can, 1510 Expr *e, ArraySizeModifier sm, unsigned tq, 1511 SourceRange brackets) 1512 : ArrayType(DependentSizedArray, et, can, sm, tq), 1513 Context(Context), SizeExpr((Stmt*) e), Brackets(brackets) {} 1514 friend class ASTContext; // ASTContext creates these. 1515 virtual void Destroy(ASTContext& C); 1516 1517public: 1518 Expr *getSizeExpr() const { 1519 // We use C-style casts instead of cast<> here because we do not wish 1520 // to have a dependency of Type.h on Stmt.h/Expr.h. 1521 return (Expr*) SizeExpr; 1522 } 1523 SourceRange getBracketsRange() const { return Brackets; } 1524 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1525 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1526 1527 bool isSugared() const { return false; } 1528 QualType desugar() const { return QualType(this, 0); } 1529 1530 static bool classof(const Type *T) { 1531 return T->getTypeClass() == DependentSizedArray; 1532 } 1533 static bool classof(const DependentSizedArrayType *) { return true; } 1534 1535 friend class StmtIteratorBase; 1536 1537 1538 void Profile(llvm::FoldingSetNodeID &ID) { 1539 Profile(ID, Context, getElementType(), 1540 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 1541 } 1542 1543 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1544 QualType ET, ArraySizeModifier SizeMod, 1545 unsigned TypeQuals, Expr *E); 1546}; 1547 1548/// DependentSizedExtVectorType - This type represent an extended vector type 1549/// where either the type or size is dependent. For example: 1550/// @code 1551/// template<typename T, int Size> 1552/// class vector { 1553/// typedef T __attribute__((ext_vector_type(Size))) type; 1554/// } 1555/// @endcode 1556class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 1557 ASTContext &Context; 1558 Expr *SizeExpr; 1559 /// ElementType - The element type of the array. 1560 QualType ElementType; 1561 SourceLocation loc; 1562 1563 DependentSizedExtVectorType(ASTContext &Context, QualType ElementType, 1564 QualType can, Expr *SizeExpr, SourceLocation loc) 1565 : Type (DependentSizedExtVector, can, true), 1566 Context(Context), SizeExpr(SizeExpr), ElementType(ElementType), 1567 loc(loc) {} 1568 friend class ASTContext; 1569 virtual void Destroy(ASTContext& C); 1570 1571public: 1572 Expr *getSizeExpr() const { return SizeExpr; } 1573 QualType getElementType() const { return ElementType; } 1574 SourceLocation getAttributeLoc() const { return loc; } 1575 1576 bool isSugared() const { return false; } 1577 QualType desugar() const { return QualType(this, 0); } 1578 1579 static bool classof(const Type *T) { 1580 return T->getTypeClass() == DependentSizedExtVector; 1581 } 1582 static bool classof(const DependentSizedExtVectorType *) { return true; } 1583 1584 void Profile(llvm::FoldingSetNodeID &ID) { 1585 Profile(ID, Context, getElementType(), getSizeExpr()); 1586 } 1587 1588 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1589 QualType ElementType, Expr *SizeExpr); 1590}; 1591 1592 1593/// VectorType - GCC generic vector type. This type is created using 1594/// __attribute__((vector_size(n)), where "n" specifies the vector size in 1595/// bytes; or from an Altivec __vector or vector declaration. 1596/// Since the constructor takes the number of vector elements, the 1597/// client is responsible for converting the size into the number of elements. 1598class VectorType : public Type, public llvm::FoldingSetNode { 1599protected: 1600 /// ElementType - The element type of the vector. 1601 QualType ElementType; 1602 1603 /// NumElements - The number of elements in the vector. 1604 unsigned NumElements; 1605 1606 /// AltiVec - True if this is for an Altivec vector. 1607 bool AltiVec; 1608 1609 /// Pixel - True if this is for an Altivec vector pixel. 1610 bool Pixel; 1611 1612 VectorType(QualType vecType, unsigned nElements, QualType canonType, 1613 bool isAltiVec, bool isPixel) : 1614 Type(Vector, canonType, vecType->isDependentType()), 1615 ElementType(vecType), NumElements(nElements), 1616 AltiVec(isAltiVec), Pixel(isPixel) {} 1617 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 1618 QualType canonType, bool isAltiVec, bool isPixel) 1619 : Type(tc, canonType, vecType->isDependentType()), ElementType(vecType), 1620 NumElements(nElements), AltiVec(isAltiVec), Pixel(isPixel) {} 1621 friend class ASTContext; // ASTContext creates these. 1622public: 1623 1624 QualType getElementType() const { return ElementType; } 1625 unsigned getNumElements() const { return NumElements; } 1626 1627 bool isSugared() const { return false; } 1628 QualType desugar() const { return QualType(this, 0); } 1629 1630 bool isAltiVec() const { return AltiVec; } 1631 1632 bool isPixel() const { return Pixel; } 1633 1634 void Profile(llvm::FoldingSetNodeID &ID) { 1635 Profile(ID, getElementType(), getNumElements(), getTypeClass(), 1636 AltiVec, Pixel); 1637 } 1638 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 1639 unsigned NumElements, TypeClass TypeClass, 1640 bool isAltiVec, bool isPixel) { 1641 ID.AddPointer(ElementType.getAsOpaquePtr()); 1642 ID.AddInteger(NumElements); 1643 ID.AddInteger(TypeClass); 1644 ID.AddBoolean(isAltiVec); 1645 ID.AddBoolean(isPixel); 1646 } 1647 1648 virtual Linkage getLinkage() const; 1649 1650 static bool classof(const Type *T) { 1651 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 1652 } 1653 static bool classof(const VectorType *) { return true; } 1654}; 1655 1656/// ExtVectorType - Extended vector type. This type is created using 1657/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 1658/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 1659/// class enables syntactic extensions, like Vector Components for accessing 1660/// points, colors, and textures (modeled after OpenGL Shading Language). 1661class ExtVectorType : public VectorType { 1662 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 1663 VectorType(ExtVector, vecType, nElements, canonType, false, false) {} 1664 friend class ASTContext; // ASTContext creates these. 1665public: 1666 static int getPointAccessorIdx(char c) { 1667 switch (c) { 1668 default: return -1; 1669 case 'x': return 0; 1670 case 'y': return 1; 1671 case 'z': return 2; 1672 case 'w': return 3; 1673 } 1674 } 1675 static int getNumericAccessorIdx(char c) { 1676 switch (c) { 1677 default: return -1; 1678 case '0': return 0; 1679 case '1': return 1; 1680 case '2': return 2; 1681 case '3': return 3; 1682 case '4': return 4; 1683 case '5': return 5; 1684 case '6': return 6; 1685 case '7': return 7; 1686 case '8': return 8; 1687 case '9': return 9; 1688 case 'A': 1689 case 'a': return 10; 1690 case 'B': 1691 case 'b': return 11; 1692 case 'C': 1693 case 'c': return 12; 1694 case 'D': 1695 case 'd': return 13; 1696 case 'E': 1697 case 'e': return 14; 1698 case 'F': 1699 case 'f': return 15; 1700 } 1701 } 1702 1703 static int getAccessorIdx(char c) { 1704 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 1705 return getNumericAccessorIdx(c); 1706 } 1707 1708 bool isAccessorWithinNumElements(char c) const { 1709 if (int idx = getAccessorIdx(c)+1) 1710 return unsigned(idx-1) < NumElements; 1711 return false; 1712 } 1713 bool isSugared() const { return false; } 1714 QualType desugar() const { return QualType(this, 0); } 1715 1716 static bool classof(const Type *T) { 1717 return T->getTypeClass() == ExtVector; 1718 } 1719 static bool classof(const ExtVectorType *) { return true; } 1720}; 1721 1722/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 1723/// class of FunctionNoProtoType and FunctionProtoType. 1724/// 1725class FunctionType : public Type { 1726 /// SubClassData - This field is owned by the subclass, put here to pack 1727 /// tightly with the ivars in Type. 1728 bool SubClassData : 1; 1729 1730 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1731 /// other bitfields. 1732 /// The qualifiers are part of FunctionProtoType because... 1733 /// 1734 /// C++ 8.3.5p4: The return type, the parameter type list and the 1735 /// cv-qualifier-seq, [...], are part of the function type. 1736 /// 1737 unsigned TypeQuals : 3; 1738 1739 /// NoReturn - Indicates if the function type is attribute noreturn. 1740 unsigned NoReturn : 1; 1741 1742 /// CallConv - The calling convention used by the function. 1743 unsigned CallConv : 2; 1744 1745 // The type returned by the function. 1746 QualType ResultType; 1747protected: 1748 FunctionType(TypeClass tc, QualType res, bool SubclassInfo, 1749 unsigned typeQuals, QualType Canonical, bool Dependent, 1750 bool noReturn = false, CallingConv callConv = CC_Default) 1751 : Type(tc, Canonical, Dependent), 1752 SubClassData(SubclassInfo), TypeQuals(typeQuals), NoReturn(noReturn), 1753 CallConv(callConv), ResultType(res) {} 1754 bool getSubClassData() const { return SubClassData; } 1755 unsigned getTypeQuals() const { return TypeQuals; } 1756public: 1757 1758 QualType getResultType() const { return ResultType; } 1759 bool getNoReturnAttr() const { return NoReturn; } 1760 CallingConv getCallConv() const { return (CallingConv)CallConv; } 1761 1762 static llvm::StringRef getNameForCallConv(CallingConv CC); 1763 1764 static bool classof(const Type *T) { 1765 return T->getTypeClass() == FunctionNoProto || 1766 T->getTypeClass() == FunctionProto; 1767 } 1768 static bool classof(const FunctionType *) { return true; } 1769}; 1770 1771/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 1772/// no information available about its arguments. 1773class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 1774 FunctionNoProtoType(QualType Result, QualType Canonical, 1775 bool NoReturn = false, CallingConv CallConv = CC_Default) 1776 : FunctionType(FunctionNoProto, Result, false, 0, Canonical, 1777 /*Dependent=*/false, NoReturn, CallConv) {} 1778 friend class ASTContext; // ASTContext creates these. 1779public: 1780 // No additional state past what FunctionType provides. 1781 1782 bool isSugared() const { return false; } 1783 QualType desugar() const { return QualType(this, 0); } 1784 1785 void Profile(llvm::FoldingSetNodeID &ID) { 1786 Profile(ID, getResultType(), getNoReturnAttr(), getCallConv()); 1787 } 1788 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 1789 bool NoReturn, CallingConv CallConv) { 1790 ID.AddInteger(CallConv); 1791 ID.AddInteger(NoReturn); 1792 ID.AddPointer(ResultType.getAsOpaquePtr()); 1793 } 1794 1795 virtual Linkage getLinkage() const; 1796 1797 static bool classof(const Type *T) { 1798 return T->getTypeClass() == FunctionNoProto; 1799 } 1800 static bool classof(const FunctionNoProtoType *) { return true; } 1801}; 1802 1803/// FunctionProtoType - Represents a prototype with argument type info, e.g. 1804/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 1805/// arguments, not as having a single void argument. Such a type can have an 1806/// exception specification, but this specification is not part of the canonical 1807/// type. 1808class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 1809 /// hasAnyDependentType - Determine whether there are any dependent 1810 /// types within the arguments passed in. 1811 static bool hasAnyDependentType(const QualType *ArgArray, unsigned numArgs) { 1812 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 1813 if (ArgArray[Idx]->isDependentType()) 1814 return true; 1815 1816 return false; 1817 } 1818 1819 FunctionProtoType(QualType Result, const QualType *ArgArray, unsigned numArgs, 1820 bool isVariadic, unsigned typeQuals, bool hasExs, 1821 bool hasAnyExs, const QualType *ExArray, 1822 unsigned numExs, QualType Canonical, bool NoReturn, 1823 CallingConv CallConv) 1824 : FunctionType(FunctionProto, Result, isVariadic, typeQuals, Canonical, 1825 (Result->isDependentType() || 1826 hasAnyDependentType(ArgArray, numArgs)), NoReturn, 1827 CallConv), 1828 NumArgs(numArgs), NumExceptions(numExs), HasExceptionSpec(hasExs), 1829 AnyExceptionSpec(hasAnyExs) { 1830 // Fill in the trailing argument array. 1831 QualType *ArgInfo = reinterpret_cast<QualType*>(this+1); 1832 for (unsigned i = 0; i != numArgs; ++i) 1833 ArgInfo[i] = ArgArray[i]; 1834 // Fill in the exception array. 1835 QualType *Ex = ArgInfo + numArgs; 1836 for (unsigned i = 0; i != numExs; ++i) 1837 Ex[i] = ExArray[i]; 1838 } 1839 1840 /// NumArgs - The number of arguments this function has, not counting '...'. 1841 unsigned NumArgs : 20; 1842 1843 /// NumExceptions - The number of types in the exception spec, if any. 1844 unsigned NumExceptions : 10; 1845 1846 /// HasExceptionSpec - Whether this function has an exception spec at all. 1847 bool HasExceptionSpec : 1; 1848 1849 /// AnyExceptionSpec - Whether this function has a throw(...) spec. 1850 bool AnyExceptionSpec : 1; 1851 1852 /// ArgInfo - There is an variable size array after the class in memory that 1853 /// holds the argument types. 1854 1855 /// Exceptions - There is another variable size array after ArgInfo that 1856 /// holds the exception types. 1857 1858 friend class ASTContext; // ASTContext creates these. 1859 1860public: 1861 unsigned getNumArgs() const { return NumArgs; } 1862 QualType getArgType(unsigned i) const { 1863 assert(i < NumArgs && "Invalid argument number!"); 1864 return arg_type_begin()[i]; 1865 } 1866 1867 bool hasExceptionSpec() const { return HasExceptionSpec; } 1868 bool hasAnyExceptionSpec() const { return AnyExceptionSpec; } 1869 unsigned getNumExceptions() const { return NumExceptions; } 1870 QualType getExceptionType(unsigned i) const { 1871 assert(i < NumExceptions && "Invalid exception number!"); 1872 return exception_begin()[i]; 1873 } 1874 bool hasEmptyExceptionSpec() const { 1875 return hasExceptionSpec() && !hasAnyExceptionSpec() && 1876 getNumExceptions() == 0; 1877 } 1878 1879 bool isVariadic() const { return getSubClassData(); } 1880 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 1881 1882 typedef const QualType *arg_type_iterator; 1883 arg_type_iterator arg_type_begin() const { 1884 return reinterpret_cast<const QualType *>(this+1); 1885 } 1886 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 1887 1888 typedef const QualType *exception_iterator; 1889 exception_iterator exception_begin() const { 1890 // exceptions begin where arguments end 1891 return arg_type_end(); 1892 } 1893 exception_iterator exception_end() const { 1894 return exception_begin() + NumExceptions; 1895 } 1896 1897 bool isSugared() const { return false; } 1898 QualType desugar() const { return QualType(this, 0); } 1899 1900 virtual Linkage getLinkage() const; 1901 1902 static bool classof(const Type *T) { 1903 return T->getTypeClass() == FunctionProto; 1904 } 1905 static bool classof(const FunctionProtoType *) { return true; } 1906 1907 void Profile(llvm::FoldingSetNodeID &ID); 1908 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 1909 arg_type_iterator ArgTys, unsigned NumArgs, 1910 bool isVariadic, unsigned TypeQuals, 1911 bool hasExceptionSpec, bool anyExceptionSpec, 1912 unsigned NumExceptions, exception_iterator Exs, 1913 bool NoReturn, CallingConv CallConv); 1914}; 1915 1916 1917/// \brief Represents the dependent type named by a dependently-scoped 1918/// typename using declaration, e.g. 1919/// using typename Base<T>::foo; 1920/// Template instantiation turns these into the underlying type. 1921class UnresolvedUsingType : public Type { 1922 UnresolvedUsingTypenameDecl *Decl; 1923 1924 UnresolvedUsingType(UnresolvedUsingTypenameDecl *D) 1925 : Type(UnresolvedUsing, QualType(), true), Decl(D) {} 1926 friend class ASTContext; // ASTContext creates these. 1927public: 1928 1929 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 1930 1931 bool isSugared() const { return false; } 1932 QualType desugar() const { return QualType(this, 0); } 1933 1934 static bool classof(const Type *T) { 1935 return T->getTypeClass() == UnresolvedUsing; 1936 } 1937 static bool classof(const UnresolvedUsingType *) { return true; } 1938 1939 void Profile(llvm::FoldingSetNodeID &ID) { 1940 return Profile(ID, Decl); 1941 } 1942 static void Profile(llvm::FoldingSetNodeID &ID, 1943 UnresolvedUsingTypenameDecl *D) { 1944 ID.AddPointer(D); 1945 } 1946}; 1947 1948 1949class TypedefType : public Type { 1950 TypedefDecl *Decl; 1951protected: 1952 TypedefType(TypeClass tc, TypedefDecl *D, QualType can) 1953 : Type(tc, can, can->isDependentType()), Decl(D) { 1954 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1955 } 1956 friend class ASTContext; // ASTContext creates these. 1957public: 1958 1959 TypedefDecl *getDecl() const { return Decl; } 1960 1961 /// LookThroughTypedefs - Return the ultimate type this typedef corresponds to 1962 /// potentially looking through *all* consecutive typedefs. This returns the 1963 /// sum of the type qualifiers, so if you have: 1964 /// typedef const int A; 1965 /// typedef volatile A B; 1966 /// looking through the typedefs for B will give you "const volatile A". 1967 QualType LookThroughTypedefs() const; 1968 1969 bool isSugared() const { return true; } 1970 QualType desugar() const; 1971 1972 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 1973 static bool classof(const TypedefType *) { return true; } 1974}; 1975 1976/// TypeOfExprType (GCC extension). 1977class TypeOfExprType : public Type { 1978 Expr *TOExpr; 1979 1980protected: 1981 TypeOfExprType(Expr *E, QualType can = QualType()); 1982 friend class ASTContext; // ASTContext creates these. 1983public: 1984 Expr *getUnderlyingExpr() const { return TOExpr; } 1985 1986 /// \brief Remove a single level of sugar. 1987 QualType desugar() const; 1988 1989 /// \brief Returns whether this type directly provides sugar. 1990 bool isSugared() const { return true; } 1991 1992 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 1993 static bool classof(const TypeOfExprType *) { return true; } 1994}; 1995 1996/// Subclass of TypeOfExprType that is used for canonical, dependent 1997/// typeof(expr) types. 1998class DependentTypeOfExprType 1999 : public TypeOfExprType, public llvm::FoldingSetNode { 2000 ASTContext &Context; 2001 2002public: 2003 DependentTypeOfExprType(ASTContext &Context, Expr *E) 2004 : TypeOfExprType(E), Context(Context) { } 2005 2006 bool isSugared() const { return false; } 2007 QualType desugar() const { return QualType(this, 0); } 2008 2009 void Profile(llvm::FoldingSetNodeID &ID) { 2010 Profile(ID, Context, getUnderlyingExpr()); 2011 } 2012 2013 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2014 Expr *E); 2015}; 2016 2017/// TypeOfType (GCC extension). 2018class TypeOfType : public Type { 2019 QualType TOType; 2020 TypeOfType(QualType T, QualType can) 2021 : Type(TypeOf, can, T->isDependentType()), TOType(T) { 2022 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2023 } 2024 friend class ASTContext; // ASTContext creates these. 2025public: 2026 QualType getUnderlyingType() const { return TOType; } 2027 2028 /// \brief Remove a single level of sugar. 2029 QualType desugar() const { return getUnderlyingType(); } 2030 2031 /// \brief Returns whether this type directly provides sugar. 2032 bool isSugared() const { return true; } 2033 2034 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 2035 static bool classof(const TypeOfType *) { return true; } 2036}; 2037 2038/// DecltypeType (C++0x) 2039class DecltypeType : public Type { 2040 Expr *E; 2041 2042 // FIXME: We could get rid of UnderlyingType if we wanted to: We would have to 2043 // Move getDesugaredType to ASTContext so that it can call getDecltypeForExpr 2044 // from it. 2045 QualType UnderlyingType; 2046 2047protected: 2048 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 2049 friend class ASTContext; // ASTContext creates these. 2050public: 2051 Expr *getUnderlyingExpr() const { return E; } 2052 QualType getUnderlyingType() const { return UnderlyingType; } 2053 2054 /// \brief Remove a single level of sugar. 2055 QualType desugar() const { return getUnderlyingType(); } 2056 2057 /// \brief Returns whether this type directly provides sugar. 2058 bool isSugared() const { return !isDependentType(); } 2059 2060 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 2061 static bool classof(const DecltypeType *) { return true; } 2062}; 2063 2064/// Subclass of DecltypeType that is used for canonical, dependent 2065/// C++0x decltype types. 2066class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 2067 ASTContext &Context; 2068 2069public: 2070 DependentDecltypeType(ASTContext &Context, Expr *E); 2071 2072 bool isSugared() const { return false; } 2073 QualType desugar() const { return QualType(this, 0); } 2074 2075 void Profile(llvm::FoldingSetNodeID &ID) { 2076 Profile(ID, Context, getUnderlyingExpr()); 2077 } 2078 2079 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2080 Expr *E); 2081}; 2082 2083class TagType : public Type { 2084 /// Stores the TagDecl associated with this type. The decl will 2085 /// point to the TagDecl that actually defines the entity (or is a 2086 /// definition in progress), if there is such a definition. The 2087 /// single-bit value will be non-zero when this tag is in the 2088 /// process of being defined. 2089 mutable llvm::PointerIntPair<TagDecl *, 1> decl; 2090 friend class ASTContext; 2091 friend class TagDecl; 2092 2093protected: 2094 TagType(TypeClass TC, TagDecl *D, QualType can); 2095 2096public: 2097 TagDecl *getDecl() const { return decl.getPointer(); } 2098 2099 /// @brief Determines whether this type is in the process of being 2100 /// defined. 2101 bool isBeingDefined() const { return decl.getInt(); } 2102 void setBeingDefined(bool Def) const { decl.setInt(Def? 1 : 0); } 2103 2104 virtual Linkage getLinkage() const; 2105 2106 static bool classof(const Type *T) { 2107 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 2108 } 2109 static bool classof(const TagType *) { return true; } 2110 static bool classof(const RecordType *) { return true; } 2111 static bool classof(const EnumType *) { return true; } 2112}; 2113 2114/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 2115/// to detect TagType objects of structs/unions/classes. 2116class RecordType : public TagType { 2117protected: 2118 explicit RecordType(RecordDecl *D) 2119 : TagType(Record, reinterpret_cast<TagDecl*>(D), QualType()) { } 2120 explicit RecordType(TypeClass TC, RecordDecl *D) 2121 : TagType(TC, reinterpret_cast<TagDecl*>(D), QualType()) { } 2122 friend class ASTContext; // ASTContext creates these. 2123public: 2124 2125 RecordDecl *getDecl() const { 2126 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 2127 } 2128 2129 // FIXME: This predicate is a helper to QualType/Type. It needs to 2130 // recursively check all fields for const-ness. If any field is declared 2131 // const, it needs to return false. 2132 bool hasConstFields() const { return false; } 2133 2134 // FIXME: RecordType needs to check when it is created that all fields are in 2135 // the same address space, and return that. 2136 unsigned getAddressSpace() const { return 0; } 2137 2138 bool isSugared() const { return false; } 2139 QualType desugar() const { return QualType(this, 0); } 2140 2141 static bool classof(const TagType *T); 2142 static bool classof(const Type *T) { 2143 return isa<TagType>(T) && classof(cast<TagType>(T)); 2144 } 2145 static bool classof(const RecordType *) { return true; } 2146}; 2147 2148/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 2149/// to detect TagType objects of enums. 2150class EnumType : public TagType { 2151 explicit EnumType(EnumDecl *D) 2152 : TagType(Enum, reinterpret_cast<TagDecl*>(D), QualType()) { } 2153 friend class ASTContext; // ASTContext creates these. 2154public: 2155 2156 EnumDecl *getDecl() const { 2157 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 2158 } 2159 2160 bool isSugared() const { return false; } 2161 QualType desugar() const { return QualType(this, 0); } 2162 2163 static bool classof(const TagType *T); 2164 static bool classof(const Type *T) { 2165 return isa<TagType>(T) && classof(cast<TagType>(T)); 2166 } 2167 static bool classof(const EnumType *) { return true; } 2168}; 2169 2170/// ElaboratedType - A non-canonical type used to represents uses of 2171/// elaborated type specifiers in C++. For example: 2172/// 2173/// void foo(union MyUnion); 2174/// ^^^^^^^^^^^^^ 2175/// 2176/// At the moment, for efficiency we do not create elaborated types in 2177/// C, since outside of typedefs all references to structs would 2178/// necessarily be elaborated. 2179class ElaboratedType : public Type, public llvm::FoldingSetNode { 2180public: 2181 enum TagKind { 2182 TK_struct, 2183 TK_union, 2184 TK_class, 2185 TK_enum 2186 }; 2187 2188private: 2189 /// The tag that was used in this elaborated type specifier. 2190 TagKind Tag; 2191 2192 /// The underlying type. 2193 QualType UnderlyingType; 2194 2195 explicit ElaboratedType(QualType Ty, TagKind Tag, QualType Canon) 2196 : Type(Elaborated, Canon, Canon->isDependentType()), 2197 Tag(Tag), UnderlyingType(Ty) { } 2198 friend class ASTContext; // ASTContext creates these. 2199 2200public: 2201 TagKind getTagKind() const { return Tag; } 2202 QualType getUnderlyingType() const { return UnderlyingType; } 2203 2204 /// \brief Remove a single level of sugar. 2205 QualType desugar() const { return getUnderlyingType(); } 2206 2207 /// \brief Returns whether this type directly provides sugar. 2208 bool isSugared() const { return true; } 2209 2210 static const char *getNameForTagKind(TagKind Kind) { 2211 switch (Kind) { 2212 default: assert(0 && "Unknown TagKind!"); 2213 case TK_struct: return "struct"; 2214 case TK_union: return "union"; 2215 case TK_class: return "class"; 2216 case TK_enum: return "enum"; 2217 } 2218 } 2219 2220 void Profile(llvm::FoldingSetNodeID &ID) { 2221 Profile(ID, getUnderlyingType(), getTagKind()); 2222 } 2223 static void Profile(llvm::FoldingSetNodeID &ID, QualType T, TagKind Tag) { 2224 ID.AddPointer(T.getAsOpaquePtr()); 2225 ID.AddInteger(Tag); 2226 } 2227 2228 static bool classof(const ElaboratedType*) { return true; } 2229 static bool classof(const Type *T) { return T->getTypeClass() == Elaborated; } 2230}; 2231 2232class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2233 unsigned Depth : 15; 2234 unsigned Index : 16; 2235 unsigned ParameterPack : 1; 2236 IdentifierInfo *Name; 2237 2238 TemplateTypeParmType(unsigned D, unsigned I, bool PP, IdentifierInfo *N, 2239 QualType Canon) 2240 : Type(TemplateTypeParm, Canon, /*Dependent=*/true), 2241 Depth(D), Index(I), ParameterPack(PP), Name(N) { } 2242 2243 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 2244 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true), 2245 Depth(D), Index(I), ParameterPack(PP), Name(0) { } 2246 2247 friend class ASTContext; // ASTContext creates these 2248 2249public: 2250 unsigned getDepth() const { return Depth; } 2251 unsigned getIndex() const { return Index; } 2252 bool isParameterPack() const { return ParameterPack; } 2253 IdentifierInfo *getName() const { return Name; } 2254 2255 bool isSugared() const { return false; } 2256 QualType desugar() const { return QualType(this, 0); } 2257 2258 void Profile(llvm::FoldingSetNodeID &ID) { 2259 Profile(ID, Depth, Index, ParameterPack, Name); 2260 } 2261 2262 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 2263 unsigned Index, bool ParameterPack, 2264 IdentifierInfo *Name) { 2265 ID.AddInteger(Depth); 2266 ID.AddInteger(Index); 2267 ID.AddBoolean(ParameterPack); 2268 ID.AddPointer(Name); 2269 } 2270 2271 static bool classof(const Type *T) { 2272 return T->getTypeClass() == TemplateTypeParm; 2273 } 2274 static bool classof(const TemplateTypeParmType *T) { return true; } 2275}; 2276 2277/// \brief Represents the result of substituting a type for a template 2278/// type parameter. 2279/// 2280/// Within an instantiated template, all template type parameters have 2281/// been replaced with these. They are used solely to record that a 2282/// type was originally written as a template type parameter; 2283/// therefore they are never canonical. 2284class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2285 // The original type parameter. 2286 const TemplateTypeParmType *Replaced; 2287 2288 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 2289 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType()), 2290 Replaced(Param) { } 2291 2292 friend class ASTContext; 2293 2294public: 2295 IdentifierInfo *getName() const { return Replaced->getName(); } 2296 2297 /// Gets the template parameter that was substituted for. 2298 const TemplateTypeParmType *getReplacedParameter() const { 2299 return Replaced; 2300 } 2301 2302 /// Gets the type that was substituted for the template 2303 /// parameter. 2304 QualType getReplacementType() const { 2305 return getCanonicalTypeInternal(); 2306 } 2307 2308 bool isSugared() const { return true; } 2309 QualType desugar() const { return getReplacementType(); } 2310 2311 void Profile(llvm::FoldingSetNodeID &ID) { 2312 Profile(ID, getReplacedParameter(), getReplacementType()); 2313 } 2314 static void Profile(llvm::FoldingSetNodeID &ID, 2315 const TemplateTypeParmType *Replaced, 2316 QualType Replacement) { 2317 ID.AddPointer(Replaced); 2318 ID.AddPointer(Replacement.getAsOpaquePtr()); 2319 } 2320 2321 static bool classof(const Type *T) { 2322 return T->getTypeClass() == SubstTemplateTypeParm; 2323 } 2324 static bool classof(const SubstTemplateTypeParmType *T) { return true; } 2325}; 2326 2327/// \brief Represents the type of a template specialization as written 2328/// in the source code. 2329/// 2330/// Template specialization types represent the syntactic form of a 2331/// template-id that refers to a type, e.g., @c vector<int>. Some 2332/// template specialization types are syntactic sugar, whose canonical 2333/// type will point to some other type node that represents the 2334/// instantiation or class template specialization. For example, a 2335/// class template specialization type of @c vector<int> will refer to 2336/// a tag type for the instantiation 2337/// @c std::vector<int, std::allocator<int>>. 2338/// 2339/// Other template specialization types, for which the template name 2340/// is dependent, may be canonical types. These types are always 2341/// dependent. 2342class TemplateSpecializationType 2343 : public Type, public llvm::FoldingSetNode { 2344 2345 // FIXME: Currently needed for profiling expressions; can we avoid this? 2346 ASTContext &Context; 2347 2348 /// \brief The name of the template being specialized. 2349 TemplateName Template; 2350 2351 /// \brief - The number of template arguments named in this class 2352 /// template specialization. 2353 unsigned NumArgs; 2354 2355 TemplateSpecializationType(ASTContext &Context, 2356 TemplateName T, 2357 const TemplateArgument *Args, 2358 unsigned NumArgs, QualType Canon); 2359 2360 virtual void Destroy(ASTContext& C); 2361 2362 friend class ASTContext; // ASTContext creates these 2363 2364public: 2365 /// \brief Determine whether any of the given template arguments are 2366 /// dependent. 2367 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 2368 unsigned NumArgs); 2369 2370 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 2371 unsigned NumArgs); 2372 2373 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &); 2374 2375 /// \brief Print a template argument list, including the '<' and '>' 2376 /// enclosing the template arguments. 2377 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 2378 unsigned NumArgs, 2379 const PrintingPolicy &Policy); 2380 2381 static std::string PrintTemplateArgumentList(const TemplateArgumentLoc *Args, 2382 unsigned NumArgs, 2383 const PrintingPolicy &Policy); 2384 2385 static std::string PrintTemplateArgumentList(const TemplateArgumentListInfo &, 2386 const PrintingPolicy &Policy); 2387 2388 typedef const TemplateArgument * iterator; 2389 2390 iterator begin() const { return getArgs(); } 2391 iterator end() const; 2392 2393 /// \brief Retrieve the name of the template that we are specializing. 2394 TemplateName getTemplateName() const { return Template; } 2395 2396 /// \brief Retrieve the template arguments. 2397 const TemplateArgument *getArgs() const { 2398 return reinterpret_cast<const TemplateArgument *>(this + 1); 2399 } 2400 2401 /// \brief Retrieve the number of template arguments. 2402 unsigned getNumArgs() const { return NumArgs; } 2403 2404 /// \brief Retrieve a specific template argument as a type. 2405 /// \precondition @c isArgType(Arg) 2406 const TemplateArgument &getArg(unsigned Idx) const; 2407 2408 bool isSugared() const { return !isDependentType(); } 2409 QualType desugar() const { return getCanonicalTypeInternal(); } 2410 2411 void Profile(llvm::FoldingSetNodeID &ID) { 2412 Profile(ID, Template, getArgs(), NumArgs, Context); 2413 } 2414 2415 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 2416 const TemplateArgument *Args, unsigned NumArgs, 2417 ASTContext &Context); 2418 2419 static bool classof(const Type *T) { 2420 return T->getTypeClass() == TemplateSpecialization; 2421 } 2422 static bool classof(const TemplateSpecializationType *T) { return true; } 2423}; 2424 2425/// \brief Represents a type that was referred to via a qualified 2426/// name, e.g., N::M::type. 2427/// 2428/// This type is used to keep track of a type name as written in the 2429/// source code, including any nested-name-specifiers. The type itself 2430/// is always "sugar", used to express what was written in the source 2431/// code but containing no additional semantic information. 2432class QualifiedNameType : public Type, public llvm::FoldingSetNode { 2433 /// \brief The nested name specifier containing the qualifier. 2434 NestedNameSpecifier *NNS; 2435 2436 /// \brief The type that this qualified name refers to. 2437 QualType NamedType; 2438 2439 QualifiedNameType(NestedNameSpecifier *NNS, QualType NamedType, 2440 QualType CanonType) 2441 : Type(QualifiedName, CanonType, NamedType->isDependentType()), 2442 NNS(NNS), NamedType(NamedType) { } 2443 2444 friend class ASTContext; // ASTContext creates these 2445 2446public: 2447 /// \brief Retrieve the qualification on this type. 2448 NestedNameSpecifier *getQualifier() const { return NNS; } 2449 2450 /// \brief Retrieve the type named by the qualified-id. 2451 QualType getNamedType() const { return NamedType; } 2452 2453 /// \brief Remove a single level of sugar. 2454 QualType desugar() const { return getNamedType(); } 2455 2456 /// \brief Returns whether this type directly provides sugar. 2457 bool isSugared() const { return true; } 2458 2459 void Profile(llvm::FoldingSetNodeID &ID) { 2460 Profile(ID, NNS, NamedType); 2461 } 2462 2463 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 2464 QualType NamedType) { 2465 ID.AddPointer(NNS); 2466 NamedType.Profile(ID); 2467 } 2468 2469 static bool classof(const Type *T) { 2470 return T->getTypeClass() == QualifiedName; 2471 } 2472 static bool classof(const QualifiedNameType *T) { return true; } 2473}; 2474 2475/// \brief Represents a 'typename' specifier that names a type within 2476/// a dependent type, e.g., "typename T::type". 2477/// 2478/// TypenameType has a very similar structure to QualifiedNameType, 2479/// which also involves a nested-name-specifier following by a type, 2480/// and (FIXME!) both can even be prefixed by the 'typename' 2481/// keyword. However, the two types serve very different roles: 2482/// QualifiedNameType is a non-semantic type that serves only as sugar 2483/// to show how a particular type was written in the source 2484/// code. TypenameType, on the other hand, only occurs when the 2485/// nested-name-specifier is dependent, such that we cannot resolve 2486/// the actual type until after instantiation. 2487class TypenameType : public Type, public llvm::FoldingSetNode { 2488 /// \brief The nested name specifier containing the qualifier. 2489 NestedNameSpecifier *NNS; 2490 2491 typedef llvm::PointerUnion<const IdentifierInfo *, 2492 const TemplateSpecializationType *> NameType; 2493 2494 /// \brief The type that this typename specifier refers to. 2495 NameType Name; 2496 2497 TypenameType(NestedNameSpecifier *NNS, const IdentifierInfo *Name, 2498 QualType CanonType) 2499 : Type(Typename, CanonType, true), NNS(NNS), Name(Name) { 2500 assert(NNS->isDependent() && 2501 "TypenameType requires a dependent nested-name-specifier"); 2502 } 2503 2504 TypenameType(NestedNameSpecifier *NNS, const TemplateSpecializationType *Ty, 2505 QualType CanonType) 2506 : Type(Typename, CanonType, true), NNS(NNS), Name(Ty) { 2507 assert(NNS->isDependent() && 2508 "TypenameType requires a dependent nested-name-specifier"); 2509 } 2510 2511 friend class ASTContext; // ASTContext creates these 2512 2513public: 2514 /// \brief Retrieve the qualification on this type. 2515 NestedNameSpecifier *getQualifier() const { return NNS; } 2516 2517 /// \brief Retrieve the type named by the typename specifier as an 2518 /// identifier. 2519 /// 2520 /// This routine will return a non-NULL identifier pointer when the 2521 /// form of the original typename was terminated by an identifier, 2522 /// e.g., "typename T::type". 2523 const IdentifierInfo *getIdentifier() const { 2524 return Name.dyn_cast<const IdentifierInfo *>(); 2525 } 2526 2527 /// \brief Retrieve the type named by the typename specifier as a 2528 /// type specialization. 2529 const TemplateSpecializationType *getTemplateId() const { 2530 return Name.dyn_cast<const TemplateSpecializationType *>(); 2531 } 2532 2533 bool isSugared() const { return false; } 2534 QualType desugar() const { return QualType(this, 0); } 2535 2536 void Profile(llvm::FoldingSetNodeID &ID) { 2537 Profile(ID, NNS, Name); 2538 } 2539 2540 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 2541 NameType Name) { 2542 ID.AddPointer(NNS); 2543 ID.AddPointer(Name.getOpaqueValue()); 2544 } 2545 2546 static bool classof(const Type *T) { 2547 return T->getTypeClass() == Typename; 2548 } 2549 static bool classof(const TypenameType *T) { return true; } 2550}; 2551 2552/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 2553/// object oriented design. They basically correspond to C++ classes. There 2554/// are two kinds of interface types, normal interfaces like "NSString" and 2555/// qualified interfaces, which are qualified with a protocol list like 2556/// "NSString<NSCopyable, NSAmazing>". 2557class ObjCInterfaceType : public Type, public llvm::FoldingSetNode { 2558 ObjCInterfaceDecl *Decl; 2559 2560 /// \brief The number of protocols stored after the ObjCInterfaceType node. 2561 /// The list of protocols is sorted on protocol name. No protocol is enterred 2562 /// more than once. 2563 unsigned NumProtocols; 2564 2565 ObjCInterfaceType(QualType Canonical, ObjCInterfaceDecl *D, 2566 ObjCProtocolDecl **Protos, unsigned NumP); 2567 friend class ASTContext; // ASTContext creates these. 2568public: 2569 void Destroy(ASTContext& C); 2570 2571 ObjCInterfaceDecl *getDecl() const { return Decl; } 2572 2573 /// getNumProtocols - Return the number of qualifying protocols in this 2574 /// interface type, or 0 if there are none. 2575 unsigned getNumProtocols() const { return NumProtocols; } 2576 2577 /// qual_iterator and friends: this provides access to the (potentially empty) 2578 /// list of protocols qualifying this interface. 2579 typedef ObjCProtocolDecl* const * qual_iterator; 2580 qual_iterator qual_begin() const { 2581 return reinterpret_cast<qual_iterator>(this + 1); 2582 } 2583 qual_iterator qual_end() const { 2584 return qual_begin() + NumProtocols; 2585 } 2586 bool qual_empty() const { return NumProtocols == 0; } 2587 2588 bool isSugared() const { return false; } 2589 QualType desugar() const { return QualType(this, 0); } 2590 2591 void Profile(llvm::FoldingSetNodeID &ID); 2592 static void Profile(llvm::FoldingSetNodeID &ID, 2593 const ObjCInterfaceDecl *Decl, 2594 ObjCProtocolDecl * const *protocols, 2595 unsigned NumProtocols); 2596 2597 virtual Linkage getLinkage() const; 2598 2599 static bool classof(const Type *T) { 2600 return T->getTypeClass() == ObjCInterface; 2601 } 2602 static bool classof(const ObjCInterfaceType *) { return true; } 2603}; 2604 2605/// ObjCObjectPointerType - Used to represent 'id', 'Interface *', 'id <p>', 2606/// and 'Interface <p> *'. 2607/// 2608/// Duplicate protocols are removed and protocol list is canonicalized to be in 2609/// alphabetical order. 2610class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 2611 QualType PointeeType; // A builtin or interface type. 2612 2613 /// \brief The number of protocols stored after the ObjCObjectPointerType 2614 /// node. 2615 /// 2616 /// The list of protocols is sorted on protocol name. No protocol is enterred 2617 /// more than once. 2618 unsigned NumProtocols; 2619 2620 ObjCObjectPointerType(QualType Canonical, QualType T, 2621 ObjCProtocolDecl **Protos, unsigned NumP); 2622 friend class ASTContext; // ASTContext creates these. 2623 2624public: 2625 void Destroy(ASTContext& C); 2626 2627 // Get the pointee type. Pointee will either be: 2628 // - a built-in type (for 'id' and 'Class'). 2629 // - an interface type (for user-defined types). 2630 // - a TypedefType whose canonical type is an interface (as in 'T' below). 2631 // For example: typedef NSObject T; T *var; 2632 QualType getPointeeType() const { return PointeeType; } 2633 2634 const ObjCInterfaceType *getInterfaceType() const { 2635 return PointeeType->getAs<ObjCInterfaceType>(); 2636 } 2637 /// getInterfaceDecl - returns an interface decl for user-defined types. 2638 ObjCInterfaceDecl *getInterfaceDecl() const { 2639 return getInterfaceType() ? getInterfaceType()->getDecl() : 0; 2640 } 2641 /// isObjCIdType - true for "id". 2642 bool isObjCIdType() const { 2643 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCId) && 2644 !NumProtocols; 2645 } 2646 /// isObjCClassType - true for "Class". 2647 bool isObjCClassType() const { 2648 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCClass) && 2649 !NumProtocols; 2650 } 2651 2652 /// isObjCQualifiedIdType - true for "id <p>". 2653 bool isObjCQualifiedIdType() const { 2654 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCId) && 2655 NumProtocols; 2656 } 2657 /// isObjCQualifiedClassType - true for "Class <p>". 2658 bool isObjCQualifiedClassType() const { 2659 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCClass) && 2660 NumProtocols; 2661 } 2662 /// qual_iterator and friends: this provides access to the (potentially empty) 2663 /// list of protocols qualifying this interface. 2664 typedef ObjCProtocolDecl* const * qual_iterator; 2665 2666 qual_iterator qual_begin() const { 2667 return reinterpret_cast<qual_iterator> (this + 1); 2668 } 2669 qual_iterator qual_end() const { 2670 return qual_begin() + NumProtocols; 2671 } 2672 bool qual_empty() const { return NumProtocols == 0; } 2673 2674 /// getNumProtocols - Return the number of qualifying protocols in this 2675 /// interface type, or 0 if there are none. 2676 unsigned getNumProtocols() const { return NumProtocols; } 2677 2678 bool isSugared() const { return false; } 2679 QualType desugar() const { return QualType(this, 0); } 2680 2681 virtual Linkage getLinkage() const; 2682 2683 void Profile(llvm::FoldingSetNodeID &ID); 2684 static void Profile(llvm::FoldingSetNodeID &ID, QualType T, 2685 ObjCProtocolDecl *const *protocols, 2686 unsigned NumProtocols); 2687 static bool classof(const Type *T) { 2688 return T->getTypeClass() == ObjCObjectPointer; 2689 } 2690 static bool classof(const ObjCObjectPointerType *) { return true; } 2691}; 2692 2693/// A qualifier set is used to build a set of qualifiers. 2694class QualifierCollector : public Qualifiers { 2695 ASTContext *Context; 2696 2697public: 2698 QualifierCollector(Qualifiers Qs = Qualifiers()) 2699 : Qualifiers(Qs), Context(0) {} 2700 QualifierCollector(ASTContext &Context, Qualifiers Qs = Qualifiers()) 2701 : Qualifiers(Qs), Context(&Context) {} 2702 2703 void setContext(ASTContext &C) { Context = &C; } 2704 2705 /// Collect any qualifiers on the given type and return an 2706 /// unqualified type. 2707 const Type *strip(QualType QT) { 2708 addFastQualifiers(QT.getLocalFastQualifiers()); 2709 if (QT.hasLocalNonFastQualifiers()) { 2710 const ExtQuals *EQ = QT.getExtQualsUnsafe(); 2711 Context = &EQ->getContext(); 2712 addQualifiers(EQ->getQualifiers()); 2713 return EQ->getBaseType(); 2714 } 2715 return QT.getTypePtrUnsafe(); 2716 } 2717 2718 /// Apply the collected qualifiers to the given type. 2719 QualType apply(QualType QT) const; 2720 2721 /// Apply the collected qualifiers to the given type. 2722 QualType apply(const Type* T) const; 2723 2724}; 2725 2726 2727// Inline function definitions. 2728 2729inline bool QualType::isCanonical() const { 2730 const Type *T = getTypePtr(); 2731 if (hasLocalQualifiers()) 2732 return T->isCanonicalUnqualified() && !isa<ArrayType>(T); 2733 return T->isCanonicalUnqualified(); 2734} 2735 2736inline bool QualType::isCanonicalAsParam() const { 2737 if (hasLocalQualifiers()) return false; 2738 const Type *T = getTypePtr(); 2739 return T->isCanonicalUnqualified() && 2740 !isa<FunctionType>(T) && !isa<ArrayType>(T); 2741} 2742 2743inline bool QualType::isConstQualified() const { 2744 return isLocalConstQualified() || 2745 getTypePtr()->getCanonicalTypeInternal().isLocalConstQualified(); 2746} 2747 2748inline bool QualType::isRestrictQualified() const { 2749 return isLocalRestrictQualified() || 2750 getTypePtr()->getCanonicalTypeInternal().isLocalRestrictQualified(); 2751} 2752 2753 2754inline bool QualType::isVolatileQualified() const { 2755 return isLocalVolatileQualified() || 2756 getTypePtr()->getCanonicalTypeInternal().isLocalVolatileQualified(); 2757} 2758 2759inline bool QualType::hasQualifiers() const { 2760 return hasLocalQualifiers() || 2761 getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers(); 2762} 2763 2764inline Qualifiers QualType::getQualifiers() const { 2765 Qualifiers Quals = getLocalQualifiers(); 2766 Quals.addQualifiers( 2767 getTypePtr()->getCanonicalTypeInternal().getLocalQualifiers()); 2768 return Quals; 2769} 2770 2771inline unsigned QualType::getCVRQualifiers() const { 2772 return getLocalCVRQualifiers() | 2773 getTypePtr()->getCanonicalTypeInternal().getLocalCVRQualifiers(); 2774} 2775 2776/// getCVRQualifiersThroughArrayTypes - If there are CVR qualifiers for this 2777/// type, returns them. Otherwise, if this is an array type, recurses 2778/// on the element type until some qualifiers have been found or a non-array 2779/// type reached. 2780inline unsigned QualType::getCVRQualifiersThroughArrayTypes() const { 2781 if (unsigned Quals = getCVRQualifiers()) 2782 return Quals; 2783 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2784 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 2785 return AT->getElementType().getCVRQualifiersThroughArrayTypes(); 2786 return 0; 2787} 2788 2789inline void QualType::removeConst() { 2790 removeFastQualifiers(Qualifiers::Const); 2791} 2792 2793inline void QualType::removeRestrict() { 2794 removeFastQualifiers(Qualifiers::Restrict); 2795} 2796 2797inline void QualType::removeVolatile() { 2798 QualifierCollector Qc; 2799 const Type *Ty = Qc.strip(*this); 2800 if (Qc.hasVolatile()) { 2801 Qc.removeVolatile(); 2802 *this = Qc.apply(Ty); 2803 } 2804} 2805 2806inline void QualType::removeCVRQualifiers(unsigned Mask) { 2807 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 2808 2809 // Fast path: we don't need to touch the slow qualifiers. 2810 if (!(Mask & ~Qualifiers::FastMask)) { 2811 removeFastQualifiers(Mask); 2812 return; 2813 } 2814 2815 QualifierCollector Qc; 2816 const Type *Ty = Qc.strip(*this); 2817 Qc.removeCVRQualifiers(Mask); 2818 *this = Qc.apply(Ty); 2819} 2820 2821/// getAddressSpace - Return the address space of this type. 2822inline unsigned QualType::getAddressSpace() const { 2823 if (hasLocalNonFastQualifiers()) { 2824 const ExtQuals *EQ = getExtQualsUnsafe(); 2825 if (EQ->hasAddressSpace()) 2826 return EQ->getAddressSpace(); 2827 } 2828 2829 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2830 if (CT.hasLocalNonFastQualifiers()) { 2831 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 2832 if (EQ->hasAddressSpace()) 2833 return EQ->getAddressSpace(); 2834 } 2835 2836 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 2837 return AT->getElementType().getAddressSpace(); 2838 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 2839 return RT->getAddressSpace(); 2840 return 0; 2841} 2842 2843/// getObjCGCAttr - Return the gc attribute of this type. 2844inline Qualifiers::GC QualType::getObjCGCAttr() const { 2845 if (hasLocalNonFastQualifiers()) { 2846 const ExtQuals *EQ = getExtQualsUnsafe(); 2847 if (EQ->hasObjCGCAttr()) 2848 return EQ->getObjCGCAttr(); 2849 } 2850 2851 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2852 if (CT.hasLocalNonFastQualifiers()) { 2853 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 2854 if (EQ->hasObjCGCAttr()) 2855 return EQ->getObjCGCAttr(); 2856 } 2857 2858 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 2859 return AT->getElementType().getObjCGCAttr(); 2860 if (const ObjCObjectPointerType *PT = CT->getAs<ObjCObjectPointerType>()) 2861 return PT->getPointeeType().getObjCGCAttr(); 2862 // We most look at all pointer types, not just pointer to interface types. 2863 if (const PointerType *PT = CT->getAs<PointerType>()) 2864 return PT->getPointeeType().getObjCGCAttr(); 2865 return Qualifiers::GCNone; 2866} 2867 2868 /// getNoReturnAttr - Returns true if the type has the noreturn attribute, 2869 /// false otherwise. 2870inline bool QualType::getNoReturnAttr() const { 2871 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2872 if (const PointerType *PT = getTypePtr()->getAs<PointerType>()) { 2873 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 2874 return FT->getNoReturnAttr(); 2875 } else if (const FunctionType *FT = getTypePtr()->getAs<FunctionType>()) 2876 return FT->getNoReturnAttr(); 2877 2878 return false; 2879} 2880 2881/// getCallConv - Returns the calling convention of the type if the type 2882/// is a function type, CC_Default otherwise. 2883inline CallingConv QualType::getCallConv() const { 2884 if (const PointerType *PT = getTypePtr()->getAs<PointerType>()) 2885 return PT->getPointeeType().getCallConv(); 2886 else if (const ReferenceType *RT = getTypePtr()->getAs<ReferenceType>()) 2887 return RT->getPointeeType().getCallConv(); 2888 else if (const MemberPointerType *MPT = 2889 getTypePtr()->getAs<MemberPointerType>()) 2890 return MPT->getPointeeType().getCallConv(); 2891 else if (const BlockPointerType *BPT = 2892 getTypePtr()->getAs<BlockPointerType>()) { 2893 if (const FunctionType *FT = BPT->getPointeeType()->getAs<FunctionType>()) 2894 return FT->getCallConv(); 2895 } else if (const FunctionType *FT = getTypePtr()->getAs<FunctionType>()) 2896 return FT->getCallConv(); 2897 2898 return CC_Default; 2899} 2900 2901/// isMoreQualifiedThan - Determine whether this type is more 2902/// qualified than the Other type. For example, "const volatile int" 2903/// is more qualified than "const int", "volatile int", and 2904/// "int". However, it is not more qualified than "const volatile 2905/// int". 2906inline bool QualType::isMoreQualifiedThan(QualType Other) const { 2907 // FIXME: work on arbitrary qualifiers 2908 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 2909 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 2910 if (getAddressSpace() != Other.getAddressSpace()) 2911 return false; 2912 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 2913} 2914 2915/// isAtLeastAsQualifiedAs - Determine whether this type is at last 2916/// as qualified as the Other type. For example, "const volatile 2917/// int" is at least as qualified as "const int", "volatile int", 2918/// "int", and "const volatile int". 2919inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 2920 // FIXME: work on arbitrary qualifiers 2921 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 2922 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 2923 if (getAddressSpace() != Other.getAddressSpace()) 2924 return false; 2925 return (MyQuals | OtherQuals) == MyQuals; 2926} 2927 2928/// getNonReferenceType - If Type is a reference type (e.g., const 2929/// int&), returns the type that the reference refers to ("const 2930/// int"). Otherwise, returns the type itself. This routine is used 2931/// throughout Sema to implement C++ 5p6: 2932/// 2933/// If an expression initially has the type "reference to T" (8.3.2, 2934/// 8.5.3), the type is adjusted to "T" prior to any further 2935/// analysis, the expression designates the object or function 2936/// denoted by the reference, and the expression is an lvalue. 2937inline QualType QualType::getNonReferenceType() const { 2938 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 2939 return RefType->getPointeeType(); 2940 else 2941 return *this; 2942} 2943 2944inline const ObjCInterfaceType *Type::getAsPointerToObjCInterfaceType() const { 2945 if (const PointerType *PT = getAs<PointerType>()) 2946 return PT->getPointeeType()->getAs<ObjCInterfaceType>(); 2947 return 0; 2948} 2949 2950inline bool Type::isFunctionType() const { 2951 return isa<FunctionType>(CanonicalType); 2952} 2953inline bool Type::isPointerType() const { 2954 return isa<PointerType>(CanonicalType); 2955} 2956inline bool Type::isAnyPointerType() const { 2957 return isPointerType() || isObjCObjectPointerType(); 2958} 2959inline bool Type::isBlockPointerType() const { 2960 return isa<BlockPointerType>(CanonicalType); 2961} 2962inline bool Type::isReferenceType() const { 2963 return isa<ReferenceType>(CanonicalType); 2964} 2965inline bool Type::isLValueReferenceType() const { 2966 return isa<LValueReferenceType>(CanonicalType); 2967} 2968inline bool Type::isRValueReferenceType() const { 2969 return isa<RValueReferenceType>(CanonicalType); 2970} 2971inline bool Type::isFunctionPointerType() const { 2972 if (const PointerType* T = getAs<PointerType>()) 2973 return T->getPointeeType()->isFunctionType(); 2974 else 2975 return false; 2976} 2977inline bool Type::isMemberPointerType() const { 2978 return isa<MemberPointerType>(CanonicalType); 2979} 2980inline bool Type::isMemberFunctionPointerType() const { 2981 if (const MemberPointerType* T = getAs<MemberPointerType>()) 2982 return T->getPointeeType()->isFunctionType(); 2983 else 2984 return false; 2985} 2986inline bool Type::isArrayType() const { 2987 return isa<ArrayType>(CanonicalType); 2988} 2989inline bool Type::isConstantArrayType() const { 2990 return isa<ConstantArrayType>(CanonicalType); 2991} 2992inline bool Type::isIncompleteArrayType() const { 2993 return isa<IncompleteArrayType>(CanonicalType); 2994} 2995inline bool Type::isVariableArrayType() const { 2996 return isa<VariableArrayType>(CanonicalType); 2997} 2998inline bool Type::isDependentSizedArrayType() const { 2999 return isa<DependentSizedArrayType>(CanonicalType); 3000} 3001inline bool Type::isRecordType() const { 3002 return isa<RecordType>(CanonicalType); 3003} 3004inline bool Type::isAnyComplexType() const { 3005 return isa<ComplexType>(CanonicalType); 3006} 3007inline bool Type::isVectorType() const { 3008 return isa<VectorType>(CanonicalType); 3009} 3010inline bool Type::isExtVectorType() const { 3011 return isa<ExtVectorType>(CanonicalType); 3012} 3013inline bool Type::isObjCObjectPointerType() const { 3014 return isa<ObjCObjectPointerType>(CanonicalType); 3015} 3016inline bool Type::isObjCInterfaceType() const { 3017 return isa<ObjCInterfaceType>(CanonicalType); 3018} 3019inline bool Type::isObjCQualifiedIdType() const { 3020 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3021 return OPT->isObjCQualifiedIdType(); 3022 return false; 3023} 3024inline bool Type::isObjCQualifiedClassType() const { 3025 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3026 return OPT->isObjCQualifiedClassType(); 3027 return false; 3028} 3029inline bool Type::isObjCIdType() const { 3030 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3031 return OPT->isObjCIdType(); 3032 return false; 3033} 3034inline bool Type::isObjCClassType() const { 3035 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3036 return OPT->isObjCClassType(); 3037 return false; 3038} 3039inline bool Type::isObjCSelType() const { 3040 if (const PointerType *OPT = getAs<PointerType>()) 3041 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 3042 return false; 3043} 3044inline bool Type::isObjCBuiltinType() const { 3045 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 3046} 3047inline bool Type::isTemplateTypeParmType() const { 3048 return isa<TemplateTypeParmType>(CanonicalType); 3049} 3050 3051inline bool Type::isSpecificBuiltinType(unsigned K) const { 3052 if (const BuiltinType *BT = getAs<BuiltinType>()) 3053 if (BT->getKind() == (BuiltinType::Kind) K) 3054 return true; 3055 return false; 3056} 3057 3058/// \brief Determines whether this is a type for which one can define 3059/// an overloaded operator. 3060inline bool Type::isOverloadableType() const { 3061 return isDependentType() || isRecordType() || isEnumeralType(); 3062} 3063 3064inline bool Type::hasPointerRepresentation() const { 3065 return (isPointerType() || isReferenceType() || isBlockPointerType() || 3066 isObjCInterfaceType() || isObjCObjectPointerType() || 3067 isObjCQualifiedInterfaceType() || isNullPtrType()); 3068} 3069 3070inline bool Type::hasObjCPointerRepresentation() const { 3071 return (isObjCInterfaceType() || isObjCObjectPointerType() || 3072 isObjCQualifiedInterfaceType()); 3073} 3074 3075/// Insertion operator for diagnostics. This allows sending QualType's into a 3076/// diagnostic with <<. 3077inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 3078 QualType T) { 3079 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 3080 Diagnostic::ak_qualtype); 3081 return DB; 3082} 3083 3084// Helper class template that is used by Type::getAs to ensure that one does 3085// not try to look through a qualified type to get to an array type. 3086template<typename T, 3087 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 3088 llvm::is_base_of<ArrayType, T>::value)> 3089struct ArrayType_cannot_be_used_with_getAs { }; 3090 3091template<typename T> 3092struct ArrayType_cannot_be_used_with_getAs<T, true>; 3093 3094/// Member-template getAs<specific type>'. 3095template <typename T> const T *Type::getAs() const { 3096 ArrayType_cannot_be_used_with_getAs<T> at; 3097 (void)at; 3098 3099 // If this is directly a T type, return it. 3100 if (const T *Ty = dyn_cast<T>(this)) 3101 return Ty; 3102 3103 // If the canonical form of this type isn't the right kind, reject it. 3104 if (!isa<T>(CanonicalType)) 3105 return 0; 3106 3107 // If this is a typedef for the type, strip the typedef off without 3108 // losing all typedef information. 3109 return cast<T>(getUnqualifiedDesugaredType()); 3110} 3111 3112} // end namespace clang 3113 3114#endif 3115