Type.h revision fd6a0887a099256c35a5b23e9afd517ffe95fa0a
1//===--- Type.h - C Language Family Type Representation ---------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Type interface and subclasses. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_CLANG_AST_TYPE_H 15#define LLVM_CLANG_AST_TYPE_H 16 17#include "clang/Basic/Diagnostic.h" 18#include "clang/Basic/IdentifierTable.h" 19#include "clang/Basic/Linkage.h" 20#include "clang/AST/NestedNameSpecifier.h" 21#include "clang/AST/TemplateName.h" 22#include "llvm/Support/Casting.h" 23#include "llvm/Support/type_traits.h" 24#include "llvm/ADT/APSInt.h" 25#include "llvm/ADT/FoldingSet.h" 26#include "llvm/ADT/PointerIntPair.h" 27#include "llvm/ADT/PointerUnion.h" 28 29using llvm::isa; 30using llvm::cast; 31using llvm::cast_or_null; 32using llvm::dyn_cast; 33using llvm::dyn_cast_or_null; 34namespace clang { 35 enum { 36 TypeAlignmentInBits = 3, 37 TypeAlignment = 1 << TypeAlignmentInBits 38 }; 39 class Type; 40 class ExtQuals; 41 class QualType; 42} 43 44namespace llvm { 45 template <typename T> 46 class PointerLikeTypeTraits; 47 template<> 48 class PointerLikeTypeTraits< ::clang::Type*> { 49 public: 50 static inline void *getAsVoidPointer(::clang::Type *P) { return P; } 51 static inline ::clang::Type *getFromVoidPointer(void *P) { 52 return static_cast< ::clang::Type*>(P); 53 } 54 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 55 }; 56 template<> 57 class PointerLikeTypeTraits< ::clang::ExtQuals*> { 58 public: 59 static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; } 60 static inline ::clang::ExtQuals *getFromVoidPointer(void *P) { 61 return static_cast< ::clang::ExtQuals*>(P); 62 } 63 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 64 }; 65 66 template <> 67 struct isPodLike<clang::QualType> { static const bool value = true; }; 68} 69 70namespace clang { 71 class ASTContext; 72 class TypedefDecl; 73 class TemplateDecl; 74 class TemplateTypeParmDecl; 75 class NonTypeTemplateParmDecl; 76 class TemplateTemplateParmDecl; 77 class TagDecl; 78 class RecordDecl; 79 class CXXRecordDecl; 80 class EnumDecl; 81 class FieldDecl; 82 class ObjCInterfaceDecl; 83 class ObjCProtocolDecl; 84 class ObjCMethodDecl; 85 class UnresolvedUsingTypenameDecl; 86 class Expr; 87 class Stmt; 88 class SourceLocation; 89 class StmtIteratorBase; 90 class TemplateArgument; 91 class TemplateArgumentLoc; 92 class TemplateArgumentListInfo; 93 class QualifiedNameType; 94 struct PrintingPolicy; 95 96 // Provide forward declarations for all of the *Type classes 97#define TYPE(Class, Base) class Class##Type; 98#include "clang/AST/TypeNodes.def" 99 100/// Qualifiers - The collection of all-type qualifiers we support. 101/// Clang supports five independent qualifiers: 102/// * C99: const, volatile, and restrict 103/// * Embedded C (TR18037): address spaces 104/// * Objective C: the GC attributes (none, weak, or strong) 105class Qualifiers { 106public: 107 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 108 Const = 0x1, 109 Restrict = 0x2, 110 Volatile = 0x4, 111 CVRMask = Const | Volatile | Restrict 112 }; 113 114 enum GC { 115 GCNone = 0, 116 Weak, 117 Strong 118 }; 119 120 enum { 121 /// The maximum supported address space number. 122 /// 24 bits should be enough for anyone. 123 MaxAddressSpace = 0xffffffu, 124 125 /// The width of the "fast" qualifier mask. 126 FastWidth = 2, 127 128 /// The fast qualifier mask. 129 FastMask = (1 << FastWidth) - 1 130 }; 131 132 Qualifiers() : Mask(0) {} 133 134 static Qualifiers fromFastMask(unsigned Mask) { 135 Qualifiers Qs; 136 Qs.addFastQualifiers(Mask); 137 return Qs; 138 } 139 140 static Qualifiers fromCVRMask(unsigned CVR) { 141 Qualifiers Qs; 142 Qs.addCVRQualifiers(CVR); 143 return Qs; 144 } 145 146 // Deserialize qualifiers from an opaque representation. 147 static Qualifiers fromOpaqueValue(unsigned opaque) { 148 Qualifiers Qs; 149 Qs.Mask = opaque; 150 return Qs; 151 } 152 153 // Serialize these qualifiers into an opaque representation. 154 unsigned getAsOpaqueValue() const { 155 return Mask; 156 } 157 158 bool hasConst() const { return Mask & Const; } 159 void setConst(bool flag) { 160 Mask = (Mask & ~Const) | (flag ? Const : 0); 161 } 162 void removeConst() { Mask &= ~Const; } 163 void addConst() { Mask |= Const; } 164 165 bool hasVolatile() const { return Mask & Volatile; } 166 void setVolatile(bool flag) { 167 Mask = (Mask & ~Volatile) | (flag ? Volatile : 0); 168 } 169 void removeVolatile() { Mask &= ~Volatile; } 170 void addVolatile() { Mask |= Volatile; } 171 172 bool hasRestrict() const { return Mask & Restrict; } 173 void setRestrict(bool flag) { 174 Mask = (Mask & ~Restrict) | (flag ? Restrict : 0); 175 } 176 void removeRestrict() { Mask &= ~Restrict; } 177 void addRestrict() { Mask |= Restrict; } 178 179 bool hasCVRQualifiers() const { return getCVRQualifiers(); } 180 unsigned getCVRQualifiers() const { return Mask & CVRMask; } 181 void setCVRQualifiers(unsigned mask) { 182 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 183 Mask = (Mask & ~CVRMask) | mask; 184 } 185 void removeCVRQualifiers(unsigned mask) { 186 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 187 Mask &= ~mask; 188 } 189 void removeCVRQualifiers() { 190 removeCVRQualifiers(CVRMask); 191 } 192 void addCVRQualifiers(unsigned mask) { 193 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 194 Mask |= mask; 195 } 196 197 bool hasObjCGCAttr() const { return Mask & GCAttrMask; } 198 GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); } 199 void setObjCGCAttr(GC type) { 200 Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift); 201 } 202 void removeObjCGCAttr() { setObjCGCAttr(GCNone); } 203 void addObjCGCAttr(GC type) { 204 assert(type); 205 setObjCGCAttr(type); 206 } 207 208 bool hasAddressSpace() const { return Mask & AddressSpaceMask; } 209 unsigned getAddressSpace() const { return Mask >> AddressSpaceShift; } 210 void setAddressSpace(unsigned space) { 211 assert(space <= MaxAddressSpace); 212 Mask = (Mask & ~AddressSpaceMask) 213 | (((uint32_t) space) << AddressSpaceShift); 214 } 215 void removeAddressSpace() { setAddressSpace(0); } 216 void addAddressSpace(unsigned space) { 217 assert(space); 218 setAddressSpace(space); 219 } 220 221 // Fast qualifiers are those that can be allocated directly 222 // on a QualType object. 223 bool hasFastQualifiers() const { return getFastQualifiers(); } 224 unsigned getFastQualifiers() const { return Mask & FastMask; } 225 void setFastQualifiers(unsigned mask) { 226 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 227 Mask = (Mask & ~FastMask) | mask; 228 } 229 void removeFastQualifiers(unsigned mask) { 230 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 231 Mask &= ~mask; 232 } 233 void removeFastQualifiers() { 234 removeFastQualifiers(FastMask); 235 } 236 void addFastQualifiers(unsigned mask) { 237 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 238 Mask |= mask; 239 } 240 241 /// hasNonFastQualifiers - Return true if the set contains any 242 /// qualifiers which require an ExtQuals node to be allocated. 243 bool hasNonFastQualifiers() const { return Mask & ~FastMask; } 244 Qualifiers getNonFastQualifiers() const { 245 Qualifiers Quals = *this; 246 Quals.setFastQualifiers(0); 247 return Quals; 248 } 249 250 /// hasQualifiers - Return true if the set contains any qualifiers. 251 bool hasQualifiers() const { return Mask; } 252 bool empty() const { return !Mask; } 253 254 /// \brief Add the qualifiers from the given set to this set. 255 void addQualifiers(Qualifiers Q) { 256 // If the other set doesn't have any non-boolean qualifiers, just 257 // bit-or it in. 258 if (!(Q.Mask & ~CVRMask)) 259 Mask |= Q.Mask; 260 else { 261 Mask |= (Q.Mask & CVRMask); 262 if (Q.hasAddressSpace()) 263 addAddressSpace(Q.getAddressSpace()); 264 if (Q.hasObjCGCAttr()) 265 addObjCGCAttr(Q.getObjCGCAttr()); 266 } 267 } 268 269 bool operator==(Qualifiers Other) const { return Mask == Other.Mask; } 270 bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; } 271 272 operator bool() const { return hasQualifiers(); } 273 274 Qualifiers &operator+=(Qualifiers R) { 275 addQualifiers(R); 276 return *this; 277 } 278 279 // Union two qualifier sets. If an enumerated qualifier appears 280 // in both sets, use the one from the right. 281 friend Qualifiers operator+(Qualifiers L, Qualifiers R) { 282 L += R; 283 return L; 284 } 285 286 std::string getAsString() const; 287 std::string getAsString(const PrintingPolicy &Policy) const { 288 std::string Buffer; 289 getAsStringInternal(Buffer, Policy); 290 return Buffer; 291 } 292 void getAsStringInternal(std::string &S, const PrintingPolicy &Policy) const; 293 294 void Profile(llvm::FoldingSetNodeID &ID) const { 295 ID.AddInteger(Mask); 296 } 297 298private: 299 300 // bits: |0 1 2|3 .. 4|5 .. 31| 301 // |C R V|GCAttr|AddrSpace| 302 uint32_t Mask; 303 304 static const uint32_t GCAttrMask = 0x18; 305 static const uint32_t GCAttrShift = 3; 306 static const uint32_t AddressSpaceMask = ~(CVRMask | GCAttrMask); 307 static const uint32_t AddressSpaceShift = 5; 308}; 309 310 311/// ExtQuals - We can encode up to three bits in the low bits of a 312/// type pointer, but there are many more type qualifiers that we want 313/// to be able to apply to an arbitrary type. Therefore we have this 314/// struct, intended to be heap-allocated and used by QualType to 315/// store qualifiers. 316/// 317/// The current design tags the 'const' and 'restrict' qualifiers in 318/// two low bits on the QualType pointer; a third bit records whether 319/// the pointer is an ExtQuals node. 'const' was chosen because it is 320/// orders of magnitude more common than the other two qualifiers, in 321/// both library and user code. It's relatively rare to see 322/// 'restrict' in user code, but many standard C headers are saturated 323/// with 'restrict' declarations, so that representing them efficiently 324/// is a critical goal of this representation. 325class ExtQuals : public llvm::FoldingSetNode { 326 // NOTE: changing the fast qualifiers should be straightforward as 327 // long as you don't make 'const' non-fast. 328 // 1. Qualifiers: 329 // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). 330 // Fast qualifiers must occupy the low-order bits. 331 // b) Update Qualifiers::FastWidth and FastMask. 332 // 2. QualType: 333 // a) Update is{Volatile,Restrict}Qualified(), defined inline. 334 // b) Update remove{Volatile,Restrict}, defined near the end of 335 // this header. 336 // 3. ASTContext: 337 // a) Update get{Volatile,Restrict}Type. 338 339 /// Context - the context to which this set belongs. We save this 340 /// here so that QualifierCollector can use it to reapply extended 341 /// qualifiers to an arbitrary type without requiring a context to 342 /// be pushed through every single API dealing with qualifiers. 343 ASTContext& Context; 344 345 /// BaseType - the underlying type that this qualifies 346 const Type *BaseType; 347 348 /// Quals - the immutable set of qualifiers applied by this 349 /// node; always contains extended qualifiers. 350 Qualifiers Quals; 351 352public: 353 ExtQuals(ASTContext& Context, const Type *Base, Qualifiers Quals) 354 : Context(Context), BaseType(Base), Quals(Quals) 355 { 356 assert(Quals.hasNonFastQualifiers() 357 && "ExtQuals created with no fast qualifiers"); 358 assert(!Quals.hasFastQualifiers() 359 && "ExtQuals created with fast qualifiers"); 360 } 361 362 Qualifiers getQualifiers() const { return Quals; } 363 364 bool hasVolatile() const { return Quals.hasVolatile(); } 365 366 bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } 367 Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } 368 369 bool hasAddressSpace() const { return Quals.hasAddressSpace(); } 370 unsigned getAddressSpace() const { return Quals.getAddressSpace(); } 371 372 const Type *getBaseType() const { return BaseType; } 373 374 ASTContext &getContext() const { return Context; } 375 376public: 377 void Profile(llvm::FoldingSetNodeID &ID) const { 378 Profile(ID, getBaseType(), Quals); 379 } 380 static void Profile(llvm::FoldingSetNodeID &ID, 381 const Type *BaseType, 382 Qualifiers Quals) { 383 assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!"); 384 ID.AddPointer(BaseType); 385 Quals.Profile(ID); 386 } 387}; 388 389/// CallingConv - Specifies the calling convention that a function uses. 390enum CallingConv { 391 CC_Default, 392 CC_C, // __attribute__((cdecl)) 393 CC_X86StdCall, // __attribute__((stdcall)) 394 CC_X86FastCall // __attribute__((fastcall)) 395}; 396 397 398/// QualType - For efficiency, we don't store CV-qualified types as nodes on 399/// their own: instead each reference to a type stores the qualifiers. This 400/// greatly reduces the number of nodes we need to allocate for types (for 401/// example we only need one for 'int', 'const int', 'volatile int', 402/// 'const volatile int', etc). 403/// 404/// As an added efficiency bonus, instead of making this a pair, we 405/// just store the two bits we care about in the low bits of the 406/// pointer. To handle the packing/unpacking, we make QualType be a 407/// simple wrapper class that acts like a smart pointer. A third bit 408/// indicates whether there are extended qualifiers present, in which 409/// case the pointer points to a special structure. 410class QualType { 411 // Thankfully, these are efficiently composable. 412 llvm::PointerIntPair<llvm::PointerUnion<const Type*,const ExtQuals*>, 413 Qualifiers::FastWidth> Value; 414 415 const ExtQuals *getExtQualsUnsafe() const { 416 return Value.getPointer().get<const ExtQuals*>(); 417 } 418 419 const Type *getTypePtrUnsafe() const { 420 return Value.getPointer().get<const Type*>(); 421 } 422 423 QualType getUnqualifiedTypeSlow() const; 424 425 friend class QualifierCollector; 426public: 427 QualType() {} 428 429 QualType(const Type *Ptr, unsigned Quals) 430 : Value(Ptr, Quals) {} 431 QualType(const ExtQuals *Ptr, unsigned Quals) 432 : Value(Ptr, Quals) {} 433 434 unsigned getLocalFastQualifiers() const { return Value.getInt(); } 435 void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); } 436 437 /// Retrieves a pointer to the underlying (unqualified) type. 438 /// This should really return a const Type, but it's not worth 439 /// changing all the users right now. 440 Type *getTypePtr() const { 441 if (hasLocalNonFastQualifiers()) 442 return const_cast<Type*>(getExtQualsUnsafe()->getBaseType()); 443 return const_cast<Type*>(getTypePtrUnsafe()); 444 } 445 446 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 447 static QualType getFromOpaquePtr(void *Ptr) { 448 QualType T; 449 T.Value.setFromOpaqueValue(Ptr); 450 return T; 451 } 452 453 Type &operator*() const { 454 return *getTypePtr(); 455 } 456 457 Type *operator->() const { 458 return getTypePtr(); 459 } 460 461 bool isCanonical() const; 462 bool isCanonicalAsParam() const; 463 464 /// isNull - Return true if this QualType doesn't point to a type yet. 465 bool isNull() const { 466 return Value.getPointer().isNull(); 467 } 468 469 /// \brief Determine whether this particular QualType instance has the 470 /// "const" qualifier set, without looking through typedefs that may have 471 /// added "const" at a different level. 472 bool isLocalConstQualified() const { 473 return (getLocalFastQualifiers() & Qualifiers::Const); 474 } 475 476 /// \brief Determine whether this type is const-qualified. 477 bool isConstQualified() const; 478 479 /// \brief Determine whether this particular QualType instance has the 480 /// "restrict" qualifier set, without looking through typedefs that may have 481 /// added "restrict" at a different level. 482 bool isLocalRestrictQualified() const { 483 return (getLocalFastQualifiers() & Qualifiers::Restrict); 484 } 485 486 /// \brief Determine whether this type is restrict-qualified. 487 bool isRestrictQualified() const; 488 489 /// \brief Determine whether this particular QualType instance has the 490 /// "volatile" qualifier set, without looking through typedefs that may have 491 /// added "volatile" at a different level. 492 bool isLocalVolatileQualified() const { 493 return (hasLocalNonFastQualifiers() && getExtQualsUnsafe()->hasVolatile()); 494 } 495 496 /// \brief Determine whether this type is volatile-qualified. 497 bool isVolatileQualified() const; 498 499 /// \brief Determine whether this particular QualType instance has any 500 /// qualifiers, without looking through any typedefs that might add 501 /// qualifiers at a different level. 502 bool hasLocalQualifiers() const { 503 return getLocalFastQualifiers() || hasLocalNonFastQualifiers(); 504 } 505 506 /// \brief Determine whether this type has any qualifiers. 507 bool hasQualifiers() const; 508 509 /// \brief Determine whether this particular QualType instance has any 510 /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType 511 /// instance. 512 bool hasLocalNonFastQualifiers() const { 513 return Value.getPointer().is<const ExtQuals*>(); 514 } 515 516 /// \brief Retrieve the set of qualifiers local to this particular QualType 517 /// instance, not including any qualifiers acquired through typedefs or 518 /// other sugar. 519 Qualifiers getLocalQualifiers() const { 520 Qualifiers Quals; 521 if (hasLocalNonFastQualifiers()) 522 Quals = getExtQualsUnsafe()->getQualifiers(); 523 Quals.addFastQualifiers(getLocalFastQualifiers()); 524 return Quals; 525 } 526 527 /// \brief Retrieve the set of qualifiers applied to this type. 528 Qualifiers getQualifiers() const; 529 530 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 531 /// local to this particular QualType instance, not including any qualifiers 532 /// acquired through typedefs or other sugar. 533 unsigned getLocalCVRQualifiers() const { 534 unsigned CVR = getLocalFastQualifiers(); 535 if (isLocalVolatileQualified()) 536 CVR |= Qualifiers::Volatile; 537 return CVR; 538 } 539 540 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 541 /// applied to this type. 542 unsigned getCVRQualifiers() const; 543 544 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 545 /// applied to this type, looking through any number of unqualified array 546 /// types to their element types' qualifiers. 547 unsigned getCVRQualifiersThroughArrayTypes() const; 548 549 bool isConstant(ASTContext& Ctx) const { 550 return QualType::isConstant(*this, Ctx); 551 } 552 553 // Don't promise in the API that anything besides 'const' can be 554 // easily added. 555 556 /// addConst - add the specified type qualifier to this QualType. 557 void addConst() { 558 addFastQualifiers(Qualifiers::Const); 559 } 560 QualType withConst() const { 561 return withFastQualifiers(Qualifiers::Const); 562 } 563 564 void addFastQualifiers(unsigned TQs) { 565 assert(!(TQs & ~Qualifiers::FastMask) 566 && "non-fast qualifier bits set in mask!"); 567 Value.setInt(Value.getInt() | TQs); 568 } 569 570 // FIXME: The remove* functions are semantically broken, because they might 571 // not remove a qualifier stored on a typedef. Most of the with* functions 572 // have the same problem. 573 void removeConst(); 574 void removeVolatile(); 575 void removeRestrict(); 576 void removeCVRQualifiers(unsigned Mask); 577 578 void removeFastQualifiers() { Value.setInt(0); } 579 void removeFastQualifiers(unsigned Mask) { 580 assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers"); 581 Value.setInt(Value.getInt() & ~Mask); 582 } 583 584 // Creates a type with the given qualifiers in addition to any 585 // qualifiers already on this type. 586 QualType withFastQualifiers(unsigned TQs) const { 587 QualType T = *this; 588 T.addFastQualifiers(TQs); 589 return T; 590 } 591 592 // Creates a type with exactly the given fast qualifiers, removing 593 // any existing fast qualifiers. 594 QualType withExactFastQualifiers(unsigned TQs) const { 595 return withoutFastQualifiers().withFastQualifiers(TQs); 596 } 597 598 // Removes fast qualifiers, but leaves any extended qualifiers in place. 599 QualType withoutFastQualifiers() const { 600 QualType T = *this; 601 T.removeFastQualifiers(); 602 return T; 603 } 604 605 /// \brief Return this type with all of the instance-specific qualifiers 606 /// removed, but without removing any qualifiers that may have been applied 607 /// through typedefs. 608 QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); } 609 610 /// \brief Return the unqualified form of the given type, which might be 611 /// desugared to eliminate qualifiers introduced via typedefs. 612 QualType getUnqualifiedType() const { 613 QualType T = getLocalUnqualifiedType(); 614 if (!T.hasQualifiers()) 615 return T; 616 617 return getUnqualifiedTypeSlow(); 618 } 619 620 bool isMoreQualifiedThan(QualType Other) const; 621 bool isAtLeastAsQualifiedAs(QualType Other) const; 622 QualType getNonReferenceType() const; 623 624 /// getDesugaredType - Return the specified type with any "sugar" removed from 625 /// the type. This takes off typedefs, typeof's etc. If the outer level of 626 /// the type is already concrete, it returns it unmodified. This is similar 627 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 628 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 629 /// concrete. 630 /// 631 /// Qualifiers are left in place. 632 QualType getDesugaredType() const { 633 return QualType::getDesugaredType(*this); 634 } 635 636 /// operator==/!= - Indicate whether the specified types and qualifiers are 637 /// identical. 638 friend bool operator==(const QualType &LHS, const QualType &RHS) { 639 return LHS.Value == RHS.Value; 640 } 641 friend bool operator!=(const QualType &LHS, const QualType &RHS) { 642 return LHS.Value != RHS.Value; 643 } 644 std::string getAsString() const; 645 646 std::string getAsString(const PrintingPolicy &Policy) const { 647 std::string S; 648 getAsStringInternal(S, Policy); 649 return S; 650 } 651 void getAsStringInternal(std::string &Str, 652 const PrintingPolicy &Policy) const; 653 654 void dump(const char *s) const; 655 void dump() const; 656 657 void Profile(llvm::FoldingSetNodeID &ID) const { 658 ID.AddPointer(getAsOpaquePtr()); 659 } 660 661 /// getAddressSpace - Return the address space of this type. 662 inline unsigned getAddressSpace() const; 663 664 /// GCAttrTypesAttr - Returns gc attribute of this type. 665 inline Qualifiers::GC getObjCGCAttr() const; 666 667 /// isObjCGCWeak true when Type is objc's weak. 668 bool isObjCGCWeak() const { 669 return getObjCGCAttr() == Qualifiers::Weak; 670 } 671 672 /// isObjCGCStrong true when Type is objc's strong. 673 bool isObjCGCStrong() const { 674 return getObjCGCAttr() == Qualifiers::Strong; 675 } 676 677 /// getNoReturnAttr - Returns true if the type has the noreturn attribute, 678 /// false otherwise. 679 bool getNoReturnAttr() const; 680 681 /// getCallConv - Returns the calling convention of the type if the type 682 /// is a function type, CC_Default otherwise. 683 CallingConv getCallConv() const; 684 685private: 686 // These methods are implemented in a separate translation unit; 687 // "static"-ize them to avoid creating temporary QualTypes in the 688 // caller. 689 static bool isConstant(QualType T, ASTContext& Ctx); 690 static QualType getDesugaredType(QualType T); 691}; 692 693} // end clang. 694 695namespace llvm { 696/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 697/// to a specific Type class. 698template<> struct simplify_type<const ::clang::QualType> { 699 typedef ::clang::Type* SimpleType; 700 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 701 return Val.getTypePtr(); 702 } 703}; 704template<> struct simplify_type< ::clang::QualType> 705 : public simplify_type<const ::clang::QualType> {}; 706 707// Teach SmallPtrSet that QualType is "basically a pointer". 708template<> 709class PointerLikeTypeTraits<clang::QualType> { 710public: 711 static inline void *getAsVoidPointer(clang::QualType P) { 712 return P.getAsOpaquePtr(); 713 } 714 static inline clang::QualType getFromVoidPointer(void *P) { 715 return clang::QualType::getFromOpaquePtr(P); 716 } 717 // Various qualifiers go in low bits. 718 enum { NumLowBitsAvailable = 0 }; 719}; 720 721} // end namespace llvm 722 723namespace clang { 724 725/// Type - This is the base class of the type hierarchy. A central concept 726/// with types is that each type always has a canonical type. A canonical type 727/// is the type with any typedef names stripped out of it or the types it 728/// references. For example, consider: 729/// 730/// typedef int foo; 731/// typedef foo* bar; 732/// 'int *' 'foo *' 'bar' 733/// 734/// There will be a Type object created for 'int'. Since int is canonical, its 735/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 736/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 737/// there is a PointerType that represents 'int*', which, like 'int', is 738/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 739/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 740/// is also 'int*'. 741/// 742/// Non-canonical types are useful for emitting diagnostics, without losing 743/// information about typedefs being used. Canonical types are useful for type 744/// comparisons (they allow by-pointer equality tests) and useful for reasoning 745/// about whether something has a particular form (e.g. is a function type), 746/// because they implicitly, recursively, strip all typedefs out of a type. 747/// 748/// Types, once created, are immutable. 749/// 750class Type { 751public: 752 enum TypeClass { 753#define TYPE(Class, Base) Class, 754#define ABSTRACT_TYPE(Class, Base) 755#include "clang/AST/TypeNodes.def" 756 TagFirst = Record, TagLast = Enum 757 }; 758 759protected: 760 enum { TypeClassBitSize = 6 }; 761 762private: 763 QualType CanonicalType; 764 765 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 766 bool Dependent : 1; 767 768 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 769 /// Note that this should stay at the end of the ivars for Type so that 770 /// subclasses can pack their bitfields into the same word. 771 unsigned TC : TypeClassBitSize; 772 773 Type(const Type&); // DO NOT IMPLEMENT. 774 void operator=(const Type&); // DO NOT IMPLEMENT. 775protected: 776 // silence VC++ warning C4355: 'this' : used in base member initializer list 777 Type *this_() { return this; } 778 Type(TypeClass tc, QualType Canonical, bool dependent) 779 : CanonicalType(Canonical.isNull() ? QualType(this_(), 0) : Canonical), 780 Dependent(dependent), TC(tc) {} 781 virtual ~Type() {} 782 virtual void Destroy(ASTContext& C); 783 friend class ASTContext; 784 785public: 786 TypeClass getTypeClass() const { return static_cast<TypeClass>(TC); } 787 788 bool isCanonicalUnqualified() const { 789 return CanonicalType.getTypePtr() == this; 790 } 791 792 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 793 /// object types, function types, and incomplete types. 794 795 /// \brief Determines whether the type describes an object in memory. 796 /// 797 /// Note that this definition of object type corresponds to the C++ 798 /// definition of object type, which includes incomplete types, as 799 /// opposed to the C definition (which does not include incomplete 800 /// types). 801 bool isObjectType() const; 802 803 /// isIncompleteType - Return true if this is an incomplete type. 804 /// A type that can describe objects, but which lacks information needed to 805 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 806 /// routine will need to determine if the size is actually required. 807 bool isIncompleteType() const; 808 809 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 810 /// type, in other words, not a function type. 811 bool isIncompleteOrObjectType() const { 812 return !isFunctionType(); 813 } 814 815 /// isPODType - Return true if this is a plain-old-data type (C++ 3.9p10). 816 bool isPODType() const; 817 818 /// isLiteralType - Return true if this is a literal type 819 /// (C++0x [basic.types]p10) 820 bool isLiteralType() const; 821 822 /// isVariablyModifiedType (C99 6.7.5.2p2) - Return true for variable array 823 /// types that have a non-constant expression. This does not include "[]". 824 bool isVariablyModifiedType() const; 825 826 /// Helper methods to distinguish type categories. All type predicates 827 /// operate on the canonical type, ignoring typedefs and qualifiers. 828 829 /// isSpecificBuiltinType - Test for a particular builtin type. 830 bool isSpecificBuiltinType(unsigned K) const; 831 832 /// isIntegerType() does *not* include complex integers (a GCC extension). 833 /// isComplexIntegerType() can be used to test for complex integers. 834 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 835 bool isEnumeralType() const; 836 bool isBooleanType() const; 837 bool isCharType() const; 838 bool isWideCharType() const; 839 bool isAnyCharacterType() const; 840 bool isIntegralType() const; 841 842 /// Floating point categories. 843 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 844 /// isComplexType() does *not* include complex integers (a GCC extension). 845 /// isComplexIntegerType() can be used to test for complex integers. 846 bool isComplexType() const; // C99 6.2.5p11 (complex) 847 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 848 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 849 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 850 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 851 bool isVoidType() const; // C99 6.2.5p19 852 bool isDerivedType() const; // C99 6.2.5p20 853 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 854 bool isAggregateType() const; 855 856 // Type Predicates: Check to see if this type is structurally the specified 857 // type, ignoring typedefs and qualifiers. 858 bool isFunctionType() const; 859 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 860 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 861 bool isPointerType() const; 862 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 863 bool isBlockPointerType() const; 864 bool isVoidPointerType() const; 865 bool isReferenceType() const; 866 bool isLValueReferenceType() const; 867 bool isRValueReferenceType() const; 868 bool isFunctionPointerType() const; 869 bool isMemberPointerType() const; 870 bool isMemberFunctionPointerType() const; 871 bool isArrayType() const; 872 bool isConstantArrayType() const; 873 bool isIncompleteArrayType() const; 874 bool isVariableArrayType() const; 875 bool isDependentSizedArrayType() const; 876 bool isRecordType() const; 877 bool isClassType() const; 878 bool isStructureType() const; 879 bool isUnionType() const; 880 bool isComplexIntegerType() const; // GCC _Complex integer type. 881 bool isVectorType() const; // GCC vector type. 882 bool isExtVectorType() const; // Extended vector type. 883 bool isObjCObjectPointerType() const; // Pointer to *any* ObjC object. 884 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 885 // for the common case. 886 bool isObjCInterfaceType() const; // NSString or NSString<foo> 887 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 888 bool isObjCQualifiedIdType() const; // id<foo> 889 bool isObjCQualifiedClassType() const; // Class<foo> 890 bool isObjCIdType() const; // id 891 bool isObjCClassType() const; // Class 892 bool isObjCSelType() const; // Class 893 bool isObjCBuiltinType() const; // 'id' or 'Class' 894 bool isTemplateTypeParmType() const; // C++ template type parameter 895 bool isNullPtrType() const; // C++0x nullptr_t 896 897 /// isDependentType - Whether this type is a dependent type, meaning 898 /// that its definition somehow depends on a template parameter 899 /// (C++ [temp.dep.type]). 900 bool isDependentType() const { return Dependent; } 901 bool isOverloadableType() const; 902 903 /// hasPointerRepresentation - Whether this type is represented 904 /// natively as a pointer; this includes pointers, references, block 905 /// pointers, and Objective-C interface, qualified id, and qualified 906 /// interface types, as well as nullptr_t. 907 bool hasPointerRepresentation() const; 908 909 /// hasObjCPointerRepresentation - Whether this type can represent 910 /// an objective pointer type for the purpose of GC'ability 911 bool hasObjCPointerRepresentation() const; 912 913 // Type Checking Functions: Check to see if this type is structurally the 914 // specified type, ignoring typedefs and qualifiers, and return a pointer to 915 // the best type we can. 916 const RecordType *getAsStructureType() const; 917 /// NOTE: getAs*ArrayType are methods on ASTContext. 918 const RecordType *getAsUnionType() const; 919 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 920 // The following is a convenience method that returns an ObjCObjectPointerType 921 // for object declared using an interface. 922 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 923 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 924 const ObjCInterfaceType *getAsObjCQualifiedInterfaceType() const; 925 const CXXRecordDecl *getCXXRecordDeclForPointerType() const; 926 927 // Member-template getAs<specific type>'. This scheme will eventually 928 // replace the specific getAsXXXX methods above. 929 // 930 // There are some specializations of this member template listed 931 // immediately following this class. 932 template <typename T> const T *getAs() const; 933 934 /// getAsPointerToObjCInterfaceType - If this is a pointer to an ObjC 935 /// interface, return the interface type, otherwise return null. 936 const ObjCInterfaceType *getAsPointerToObjCInterfaceType() const; 937 938 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 939 /// element type of the array, potentially with type qualifiers missing. 940 /// This method should never be used when type qualifiers are meaningful. 941 const Type *getArrayElementTypeNoTypeQual() const; 942 943 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 944 /// pointer, this returns the respective pointee. 945 QualType getPointeeType() const; 946 947 /// getUnqualifiedDesugaredType() - Return the specified type with 948 /// any "sugar" removed from the type, removing any typedefs, 949 /// typeofs, etc., as well as any qualifiers. 950 const Type *getUnqualifiedDesugaredType() const; 951 952 /// More type predicates useful for type checking/promotion 953 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 954 955 /// isSignedIntegerType - Return true if this is an integer type that is 956 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 957 /// an enum decl which has a signed representation, or a vector of signed 958 /// integer element type. 959 bool isSignedIntegerType() const; 960 961 /// isUnsignedIntegerType - Return true if this is an integer type that is 962 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 963 /// decl which has an unsigned representation, or a vector of unsigned integer 964 /// element type. 965 bool isUnsignedIntegerType() const; 966 967 /// isConstantSizeType - Return true if this is not a variable sized type, 968 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 969 /// incomplete types. 970 bool isConstantSizeType() const; 971 972 /// isSpecifierType - Returns true if this type can be represented by some 973 /// set of type specifiers. 974 bool isSpecifierType() const; 975 976 const char *getTypeClassName() const; 977 978 /// \brief Determine the linkage of this type. 979 virtual Linkage getLinkage() const; 980 981 QualType getCanonicalTypeInternal() const { return CanonicalType; } 982 void dump() const; 983 static bool classof(const Type *) { return true; } 984}; 985 986template <> inline const TypedefType *Type::getAs() const { 987 return dyn_cast<TypedefType>(this); 988} 989 990// We can do canonical leaf types faster, because we don't have to 991// worry about preserving child type decoration. 992#define TYPE(Class, Base) 993#define LEAF_TYPE(Class) \ 994template <> inline const Class##Type *Type::getAs() const { \ 995 return dyn_cast<Class##Type>(CanonicalType); \ 996} 997#include "clang/AST/TypeNodes.def" 998 999 1000/// BuiltinType - This class is used for builtin types like 'int'. Builtin 1001/// types are always canonical and have a literal name field. 1002class BuiltinType : public Type { 1003public: 1004 enum Kind { 1005 Void, 1006 1007 Bool, // This is bool and/or _Bool. 1008 Char_U, // This is 'char' for targets where char is unsigned. 1009 UChar, // This is explicitly qualified unsigned char. 1010 Char16, // This is 'char16_t' for C++. 1011 Char32, // This is 'char32_t' for C++. 1012 UShort, 1013 UInt, 1014 ULong, 1015 ULongLong, 1016 UInt128, // __uint128_t 1017 1018 Char_S, // This is 'char' for targets where char is signed. 1019 SChar, // This is explicitly qualified signed char. 1020 WChar, // This is 'wchar_t' for C++. 1021 Short, 1022 Int, 1023 Long, 1024 LongLong, 1025 Int128, // __int128_t 1026 1027 Float, Double, LongDouble, 1028 1029 NullPtr, // This is the type of C++0x 'nullptr'. 1030 1031 Overload, // This represents the type of an overloaded function declaration. 1032 Dependent, // This represents the type of a type-dependent expression. 1033 1034 UndeducedAuto, // In C++0x, this represents the type of an auto variable 1035 // that has not been deduced yet. 1036 ObjCId, // This represents the ObjC 'id' type. 1037 ObjCClass, // This represents the ObjC 'Class' type. 1038 ObjCSel // This represents the ObjC 'SEL' type. 1039 }; 1040private: 1041 Kind TypeKind; 1042public: 1043 BuiltinType(Kind K) 1044 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent)), 1045 TypeKind(K) {} 1046 1047 Kind getKind() const { return TypeKind; } 1048 const char *getName(const LangOptions &LO) const; 1049 1050 bool isSugared() const { return false; } 1051 QualType desugar() const { return QualType(this, 0); } 1052 1053 bool isInteger() const { 1054 return TypeKind >= Bool && TypeKind <= Int128; 1055 } 1056 1057 bool isSignedInteger() const { 1058 return TypeKind >= Char_S && TypeKind <= Int128; 1059 } 1060 1061 bool isUnsignedInteger() const { 1062 return TypeKind >= Bool && TypeKind <= UInt128; 1063 } 1064 1065 bool isFloatingPoint() const { 1066 return TypeKind >= Float && TypeKind <= LongDouble; 1067 } 1068 1069 virtual Linkage getLinkage() const; 1070 1071 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1072 static bool classof(const BuiltinType *) { return true; } 1073}; 1074 1075/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1076/// types (_Complex float etc) as well as the GCC integer complex extensions. 1077/// 1078class ComplexType : public Type, public llvm::FoldingSetNode { 1079 QualType ElementType; 1080 ComplexType(QualType Element, QualType CanonicalPtr) : 1081 Type(Complex, CanonicalPtr, Element->isDependentType()), 1082 ElementType(Element) { 1083 } 1084 friend class ASTContext; // ASTContext creates these. 1085public: 1086 QualType getElementType() const { return ElementType; } 1087 1088 bool isSugared() const { return false; } 1089 QualType desugar() const { return QualType(this, 0); } 1090 1091 void Profile(llvm::FoldingSetNodeID &ID) { 1092 Profile(ID, getElementType()); 1093 } 1094 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1095 ID.AddPointer(Element.getAsOpaquePtr()); 1096 } 1097 1098 virtual Linkage getLinkage() const; 1099 1100 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1101 static bool classof(const ComplexType *) { return true; } 1102}; 1103 1104/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1105/// 1106class PointerType : public Type, public llvm::FoldingSetNode { 1107 QualType PointeeType; 1108 1109 PointerType(QualType Pointee, QualType CanonicalPtr) : 1110 Type(Pointer, CanonicalPtr, Pointee->isDependentType()), PointeeType(Pointee) { 1111 } 1112 friend class ASTContext; // ASTContext creates these. 1113public: 1114 1115 QualType getPointeeType() const { return PointeeType; } 1116 1117 bool isSugared() const { return false; } 1118 QualType desugar() const { return QualType(this, 0); } 1119 1120 void Profile(llvm::FoldingSetNodeID &ID) { 1121 Profile(ID, getPointeeType()); 1122 } 1123 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1124 ID.AddPointer(Pointee.getAsOpaquePtr()); 1125 } 1126 1127 virtual Linkage getLinkage() const; 1128 1129 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1130 static bool classof(const PointerType *) { return true; } 1131}; 1132 1133/// BlockPointerType - pointer to a block type. 1134/// This type is to represent types syntactically represented as 1135/// "void (^)(int)", etc. Pointee is required to always be a function type. 1136/// 1137class BlockPointerType : public Type, public llvm::FoldingSetNode { 1138 QualType PointeeType; // Block is some kind of pointer type 1139 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1140 Type(BlockPointer, CanonicalCls, Pointee->isDependentType()), 1141 PointeeType(Pointee) { 1142 } 1143 friend class ASTContext; // ASTContext creates these. 1144public: 1145 1146 // Get the pointee type. Pointee is required to always be a function type. 1147 QualType getPointeeType() const { return PointeeType; } 1148 1149 bool isSugared() const { return false; } 1150 QualType desugar() const { return QualType(this, 0); } 1151 1152 void Profile(llvm::FoldingSetNodeID &ID) { 1153 Profile(ID, getPointeeType()); 1154 } 1155 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1156 ID.AddPointer(Pointee.getAsOpaquePtr()); 1157 } 1158 1159 virtual Linkage getLinkage() const; 1160 1161 static bool classof(const Type *T) { 1162 return T->getTypeClass() == BlockPointer; 1163 } 1164 static bool classof(const BlockPointerType *) { return true; } 1165}; 1166 1167/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 1168/// 1169class ReferenceType : public Type, public llvm::FoldingSetNode { 1170 QualType PointeeType; 1171 1172 /// True if the type was originally spelled with an lvalue sigil. 1173 /// This is never true of rvalue references but can also be false 1174 /// on lvalue references because of C++0x [dcl.typedef]p9, 1175 /// as follows: 1176 /// 1177 /// typedef int &ref; // lvalue, spelled lvalue 1178 /// typedef int &&rvref; // rvalue 1179 /// ref &a; // lvalue, inner ref, spelled lvalue 1180 /// ref &&a; // lvalue, inner ref 1181 /// rvref &a; // lvalue, inner ref, spelled lvalue 1182 /// rvref &&a; // rvalue, inner ref 1183 bool SpelledAsLValue; 1184 1185 /// True if the inner type is a reference type. This only happens 1186 /// in non-canonical forms. 1187 bool InnerRef; 1188 1189protected: 1190 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 1191 bool SpelledAsLValue) : 1192 Type(tc, CanonicalRef, Referencee->isDependentType()), 1193 PointeeType(Referencee), SpelledAsLValue(SpelledAsLValue), 1194 InnerRef(Referencee->isReferenceType()) { 1195 } 1196public: 1197 bool isSpelledAsLValue() const { return SpelledAsLValue; } 1198 1199 QualType getPointeeTypeAsWritten() const { return PointeeType; } 1200 QualType getPointeeType() const { 1201 // FIXME: this might strip inner qualifiers; okay? 1202 const ReferenceType *T = this; 1203 while (T->InnerRef) 1204 T = T->PointeeType->getAs<ReferenceType>(); 1205 return T->PointeeType; 1206 } 1207 1208 void Profile(llvm::FoldingSetNodeID &ID) { 1209 Profile(ID, PointeeType, SpelledAsLValue); 1210 } 1211 static void Profile(llvm::FoldingSetNodeID &ID, 1212 QualType Referencee, 1213 bool SpelledAsLValue) { 1214 ID.AddPointer(Referencee.getAsOpaquePtr()); 1215 ID.AddBoolean(SpelledAsLValue); 1216 } 1217 1218 virtual Linkage getLinkage() const; 1219 1220 static bool classof(const Type *T) { 1221 return T->getTypeClass() == LValueReference || 1222 T->getTypeClass() == RValueReference; 1223 } 1224 static bool classof(const ReferenceType *) { return true; } 1225}; 1226 1227/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 1228/// 1229class LValueReferenceType : public ReferenceType { 1230 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 1231 bool SpelledAsLValue) : 1232 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 1233 {} 1234 friend class ASTContext; // ASTContext creates these 1235public: 1236 bool isSugared() const { return false; } 1237 QualType desugar() const { return QualType(this, 0); } 1238 1239 static bool classof(const Type *T) { 1240 return T->getTypeClass() == LValueReference; 1241 } 1242 static bool classof(const LValueReferenceType *) { return true; } 1243}; 1244 1245/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 1246/// 1247class RValueReferenceType : public ReferenceType { 1248 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 1249 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 1250 } 1251 friend class ASTContext; // ASTContext creates these 1252public: 1253 bool isSugared() const { return false; } 1254 QualType desugar() const { return QualType(this, 0); } 1255 1256 static bool classof(const Type *T) { 1257 return T->getTypeClass() == RValueReference; 1258 } 1259 static bool classof(const RValueReferenceType *) { return true; } 1260}; 1261 1262/// MemberPointerType - C++ 8.3.3 - Pointers to members 1263/// 1264class MemberPointerType : public Type, public llvm::FoldingSetNode { 1265 QualType PointeeType; 1266 /// The class of which the pointee is a member. Must ultimately be a 1267 /// RecordType, but could be a typedef or a template parameter too. 1268 const Type *Class; 1269 1270 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 1271 Type(MemberPointer, CanonicalPtr, 1272 Cls->isDependentType() || Pointee->isDependentType()), 1273 PointeeType(Pointee), Class(Cls) { 1274 } 1275 friend class ASTContext; // ASTContext creates these. 1276public: 1277 1278 QualType getPointeeType() const { return PointeeType; } 1279 1280 const Type *getClass() const { return Class; } 1281 1282 bool isSugared() const { return false; } 1283 QualType desugar() const { return QualType(this, 0); } 1284 1285 void Profile(llvm::FoldingSetNodeID &ID) { 1286 Profile(ID, getPointeeType(), getClass()); 1287 } 1288 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 1289 const Type *Class) { 1290 ID.AddPointer(Pointee.getAsOpaquePtr()); 1291 ID.AddPointer(Class); 1292 } 1293 1294 virtual Linkage getLinkage() const; 1295 1296 static bool classof(const Type *T) { 1297 return T->getTypeClass() == MemberPointer; 1298 } 1299 static bool classof(const MemberPointerType *) { return true; } 1300}; 1301 1302/// ArrayType - C99 6.7.5.2 - Array Declarators. 1303/// 1304class ArrayType : public Type, public llvm::FoldingSetNode { 1305public: 1306 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 1307 /// an array with a static size (e.g. int X[static 4]), or an array 1308 /// with a star size (e.g. int X[*]). 1309 /// 'static' is only allowed on function parameters. 1310 enum ArraySizeModifier { 1311 Normal, Static, Star 1312 }; 1313private: 1314 /// ElementType - The element type of the array. 1315 QualType ElementType; 1316 1317 // NOTE: VC++ treats enums as signed, avoid using the ArraySizeModifier enum 1318 /// NOTE: These fields are packed into the bitfields space in the Type class. 1319 unsigned SizeModifier : 2; 1320 1321 /// IndexTypeQuals - Capture qualifiers in declarations like: 1322 /// 'int X[static restrict 4]'. For function parameters only. 1323 unsigned IndexTypeQuals : 3; 1324 1325protected: 1326 // C++ [temp.dep.type]p1: 1327 // A type is dependent if it is... 1328 // - an array type constructed from any dependent type or whose 1329 // size is specified by a constant expression that is 1330 // value-dependent, 1331 ArrayType(TypeClass tc, QualType et, QualType can, 1332 ArraySizeModifier sm, unsigned tq) 1333 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray), 1334 ElementType(et), SizeModifier(sm), IndexTypeQuals(tq) {} 1335 1336 friend class ASTContext; // ASTContext creates these. 1337public: 1338 QualType getElementType() const { return ElementType; } 1339 ArraySizeModifier getSizeModifier() const { 1340 return ArraySizeModifier(SizeModifier); 1341 } 1342 Qualifiers getIndexTypeQualifiers() const { 1343 return Qualifiers::fromCVRMask(IndexTypeQuals); 1344 } 1345 unsigned getIndexTypeCVRQualifiers() const { return IndexTypeQuals; } 1346 1347 virtual Linkage getLinkage() const; 1348 1349 static bool classof(const Type *T) { 1350 return T->getTypeClass() == ConstantArray || 1351 T->getTypeClass() == VariableArray || 1352 T->getTypeClass() == IncompleteArray || 1353 T->getTypeClass() == DependentSizedArray; 1354 } 1355 static bool classof(const ArrayType *) { return true; } 1356}; 1357 1358/// ConstantArrayType - This class represents the canonical version of 1359/// C arrays with a specified constant size. For example, the canonical 1360/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 1361/// type is 'int' and the size is 404. 1362class ConstantArrayType : public ArrayType { 1363 llvm::APInt Size; // Allows us to unique the type. 1364 1365 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 1366 ArraySizeModifier sm, unsigned tq) 1367 : ArrayType(ConstantArray, et, can, sm, tq), 1368 Size(size) {} 1369protected: 1370 ConstantArrayType(TypeClass tc, QualType et, QualType can, 1371 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 1372 : ArrayType(tc, et, can, sm, tq), Size(size) {} 1373 friend class ASTContext; // ASTContext creates these. 1374public: 1375 const llvm::APInt &getSize() const { return Size; } 1376 bool isSugared() const { return false; } 1377 QualType desugar() const { return QualType(this, 0); } 1378 1379 void Profile(llvm::FoldingSetNodeID &ID) { 1380 Profile(ID, getElementType(), getSize(), 1381 getSizeModifier(), getIndexTypeCVRQualifiers()); 1382 } 1383 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1384 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 1385 unsigned TypeQuals) { 1386 ID.AddPointer(ET.getAsOpaquePtr()); 1387 ID.AddInteger(ArraySize.getZExtValue()); 1388 ID.AddInteger(SizeMod); 1389 ID.AddInteger(TypeQuals); 1390 } 1391 static bool classof(const Type *T) { 1392 return T->getTypeClass() == ConstantArray; 1393 } 1394 static bool classof(const ConstantArrayType *) { return true; } 1395}; 1396 1397/// IncompleteArrayType - This class represents C arrays with an unspecified 1398/// size. For example 'int A[]' has an IncompleteArrayType where the element 1399/// type is 'int' and the size is unspecified. 1400class IncompleteArrayType : public ArrayType { 1401 1402 IncompleteArrayType(QualType et, QualType can, 1403 ArraySizeModifier sm, unsigned tq) 1404 : ArrayType(IncompleteArray, et, can, sm, tq) {} 1405 friend class ASTContext; // ASTContext creates these. 1406public: 1407 bool isSugared() const { return false; } 1408 QualType desugar() const { return QualType(this, 0); } 1409 1410 static bool classof(const Type *T) { 1411 return T->getTypeClass() == IncompleteArray; 1412 } 1413 static bool classof(const IncompleteArrayType *) { return true; } 1414 1415 friend class StmtIteratorBase; 1416 1417 void Profile(llvm::FoldingSetNodeID &ID) { 1418 Profile(ID, getElementType(), getSizeModifier(), 1419 getIndexTypeCVRQualifiers()); 1420 } 1421 1422 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1423 ArraySizeModifier SizeMod, unsigned TypeQuals) { 1424 ID.AddPointer(ET.getAsOpaquePtr()); 1425 ID.AddInteger(SizeMod); 1426 ID.AddInteger(TypeQuals); 1427 } 1428}; 1429 1430/// VariableArrayType - This class represents C arrays with a specified size 1431/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 1432/// Since the size expression is an arbitrary expression, we store it as such. 1433/// 1434/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 1435/// should not be: two lexically equivalent variable array types could mean 1436/// different things, for example, these variables do not have the same type 1437/// dynamically: 1438/// 1439/// void foo(int x) { 1440/// int Y[x]; 1441/// ++x; 1442/// int Z[x]; 1443/// } 1444/// 1445class VariableArrayType : public ArrayType { 1446 /// SizeExpr - An assignment expression. VLA's are only permitted within 1447 /// a function block. 1448 Stmt *SizeExpr; 1449 /// Brackets - The left and right array brackets. 1450 SourceRange Brackets; 1451 1452 VariableArrayType(QualType et, QualType can, Expr *e, 1453 ArraySizeModifier sm, unsigned tq, 1454 SourceRange brackets) 1455 : ArrayType(VariableArray, et, can, sm, tq), 1456 SizeExpr((Stmt*) e), Brackets(brackets) {} 1457 friend class ASTContext; // ASTContext creates these. 1458 virtual void Destroy(ASTContext& C); 1459 1460public: 1461 Expr *getSizeExpr() const { 1462 // We use C-style casts instead of cast<> here because we do not wish 1463 // to have a dependency of Type.h on Stmt.h/Expr.h. 1464 return (Expr*) SizeExpr; 1465 } 1466 SourceRange getBracketsRange() const { return Brackets; } 1467 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1468 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1469 1470 bool isSugared() const { return false; } 1471 QualType desugar() const { return QualType(this, 0); } 1472 1473 static bool classof(const Type *T) { 1474 return T->getTypeClass() == VariableArray; 1475 } 1476 static bool classof(const VariableArrayType *) { return true; } 1477 1478 friend class StmtIteratorBase; 1479 1480 void Profile(llvm::FoldingSetNodeID &ID) { 1481 assert(0 && "Cannnot unique VariableArrayTypes."); 1482 } 1483}; 1484 1485/// DependentSizedArrayType - This type represents an array type in 1486/// C++ whose size is a value-dependent expression. For example: 1487/// 1488/// \code 1489/// template<typename T, int Size> 1490/// class array { 1491/// T data[Size]; 1492/// }; 1493/// \endcode 1494/// 1495/// For these types, we won't actually know what the array bound is 1496/// until template instantiation occurs, at which point this will 1497/// become either a ConstantArrayType or a VariableArrayType. 1498class DependentSizedArrayType : public ArrayType { 1499 ASTContext &Context; 1500 1501 /// \brief An assignment expression that will instantiate to the 1502 /// size of the array. 1503 /// 1504 /// The expression itself might be NULL, in which case the array 1505 /// type will have its size deduced from an initializer. 1506 Stmt *SizeExpr; 1507 1508 /// Brackets - The left and right array brackets. 1509 SourceRange Brackets; 1510 1511 DependentSizedArrayType(ASTContext &Context, QualType et, QualType can, 1512 Expr *e, ArraySizeModifier sm, unsigned tq, 1513 SourceRange brackets) 1514 : ArrayType(DependentSizedArray, et, can, sm, tq), 1515 Context(Context), SizeExpr((Stmt*) e), Brackets(brackets) {} 1516 friend class ASTContext; // ASTContext creates these. 1517 virtual void Destroy(ASTContext& C); 1518 1519public: 1520 Expr *getSizeExpr() const { 1521 // We use C-style casts instead of cast<> here because we do not wish 1522 // to have a dependency of Type.h on Stmt.h/Expr.h. 1523 return (Expr*) SizeExpr; 1524 } 1525 SourceRange getBracketsRange() const { return Brackets; } 1526 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1527 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1528 1529 bool isSugared() const { return false; } 1530 QualType desugar() const { return QualType(this, 0); } 1531 1532 static bool classof(const Type *T) { 1533 return T->getTypeClass() == DependentSizedArray; 1534 } 1535 static bool classof(const DependentSizedArrayType *) { return true; } 1536 1537 friend class StmtIteratorBase; 1538 1539 1540 void Profile(llvm::FoldingSetNodeID &ID) { 1541 Profile(ID, Context, getElementType(), 1542 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 1543 } 1544 1545 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1546 QualType ET, ArraySizeModifier SizeMod, 1547 unsigned TypeQuals, Expr *E); 1548}; 1549 1550/// DependentSizedExtVectorType - This type represent an extended vector type 1551/// where either the type or size is dependent. For example: 1552/// @code 1553/// template<typename T, int Size> 1554/// class vector { 1555/// typedef T __attribute__((ext_vector_type(Size))) type; 1556/// } 1557/// @endcode 1558class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 1559 ASTContext &Context; 1560 Expr *SizeExpr; 1561 /// ElementType - The element type of the array. 1562 QualType ElementType; 1563 SourceLocation loc; 1564 1565 DependentSizedExtVectorType(ASTContext &Context, QualType ElementType, 1566 QualType can, Expr *SizeExpr, SourceLocation loc) 1567 : Type (DependentSizedExtVector, can, true), 1568 Context(Context), SizeExpr(SizeExpr), ElementType(ElementType), 1569 loc(loc) {} 1570 friend class ASTContext; 1571 virtual void Destroy(ASTContext& C); 1572 1573public: 1574 Expr *getSizeExpr() const { return SizeExpr; } 1575 QualType getElementType() const { return ElementType; } 1576 SourceLocation getAttributeLoc() const { return loc; } 1577 1578 bool isSugared() const { return false; } 1579 QualType desugar() const { return QualType(this, 0); } 1580 1581 static bool classof(const Type *T) { 1582 return T->getTypeClass() == DependentSizedExtVector; 1583 } 1584 static bool classof(const DependentSizedExtVectorType *) { return true; } 1585 1586 void Profile(llvm::FoldingSetNodeID &ID) { 1587 Profile(ID, Context, getElementType(), getSizeExpr()); 1588 } 1589 1590 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1591 QualType ElementType, Expr *SizeExpr); 1592}; 1593 1594 1595/// VectorType - GCC generic vector type. This type is created using 1596/// __attribute__((vector_size(n)), where "n" specifies the vector size in 1597/// bytes; or from an Altivec __vector or vector declaration. 1598/// Since the constructor takes the number of vector elements, the 1599/// client is responsible for converting the size into the number of elements. 1600class VectorType : public Type, public llvm::FoldingSetNode { 1601protected: 1602 /// ElementType - The element type of the vector. 1603 QualType ElementType; 1604 1605 /// NumElements - The number of elements in the vector. 1606 unsigned NumElements; 1607 1608 /// AltiVec - True if this is for an Altivec vector. 1609 bool AltiVec; 1610 1611 /// Pixel - True if this is for an Altivec vector pixel. 1612 bool Pixel; 1613 1614 VectorType(QualType vecType, unsigned nElements, QualType canonType, 1615 bool isAltiVec, bool isPixel) : 1616 Type(Vector, canonType, vecType->isDependentType()), 1617 ElementType(vecType), NumElements(nElements), 1618 AltiVec(isAltiVec), Pixel(isPixel) {} 1619 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 1620 QualType canonType, bool isAltiVec, bool isPixel) 1621 : Type(tc, canonType, vecType->isDependentType()), ElementType(vecType), 1622 NumElements(nElements), AltiVec(isAltiVec), Pixel(isPixel) {} 1623 friend class ASTContext; // ASTContext creates these. 1624public: 1625 1626 QualType getElementType() const { return ElementType; } 1627 unsigned getNumElements() const { return NumElements; } 1628 1629 bool isSugared() const { return false; } 1630 QualType desugar() const { return QualType(this, 0); } 1631 1632 bool isAltiVec() const { return AltiVec; } 1633 1634 bool isPixel() const { return Pixel; } 1635 1636 void Profile(llvm::FoldingSetNodeID &ID) { 1637 Profile(ID, getElementType(), getNumElements(), getTypeClass(), 1638 AltiVec, Pixel); 1639 } 1640 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 1641 unsigned NumElements, TypeClass TypeClass, 1642 bool isAltiVec, bool isPixel) { 1643 ID.AddPointer(ElementType.getAsOpaquePtr()); 1644 ID.AddInteger(NumElements); 1645 ID.AddInteger(TypeClass); 1646 ID.AddBoolean(isAltiVec); 1647 ID.AddBoolean(isPixel); 1648 } 1649 1650 virtual Linkage getLinkage() const; 1651 1652 static bool classof(const Type *T) { 1653 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 1654 } 1655 static bool classof(const VectorType *) { return true; } 1656}; 1657 1658/// ExtVectorType - Extended vector type. This type is created using 1659/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 1660/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 1661/// class enables syntactic extensions, like Vector Components for accessing 1662/// points, colors, and textures (modeled after OpenGL Shading Language). 1663class ExtVectorType : public VectorType { 1664 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 1665 VectorType(ExtVector, vecType, nElements, canonType, false, false) {} 1666 friend class ASTContext; // ASTContext creates these. 1667public: 1668 static int getPointAccessorIdx(char c) { 1669 switch (c) { 1670 default: return -1; 1671 case 'x': return 0; 1672 case 'y': return 1; 1673 case 'z': return 2; 1674 case 'w': return 3; 1675 } 1676 } 1677 static int getNumericAccessorIdx(char c) { 1678 switch (c) { 1679 default: return -1; 1680 case '0': return 0; 1681 case '1': return 1; 1682 case '2': return 2; 1683 case '3': return 3; 1684 case '4': return 4; 1685 case '5': return 5; 1686 case '6': return 6; 1687 case '7': return 7; 1688 case '8': return 8; 1689 case '9': return 9; 1690 case 'A': 1691 case 'a': return 10; 1692 case 'B': 1693 case 'b': return 11; 1694 case 'C': 1695 case 'c': return 12; 1696 case 'D': 1697 case 'd': return 13; 1698 case 'E': 1699 case 'e': return 14; 1700 case 'F': 1701 case 'f': return 15; 1702 } 1703 } 1704 1705 static int getAccessorIdx(char c) { 1706 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 1707 return getNumericAccessorIdx(c); 1708 } 1709 1710 bool isAccessorWithinNumElements(char c) const { 1711 if (int idx = getAccessorIdx(c)+1) 1712 return unsigned(idx-1) < NumElements; 1713 return false; 1714 } 1715 bool isSugared() const { return false; } 1716 QualType desugar() const { return QualType(this, 0); } 1717 1718 static bool classof(const Type *T) { 1719 return T->getTypeClass() == ExtVector; 1720 } 1721 static bool classof(const ExtVectorType *) { return true; } 1722}; 1723 1724/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 1725/// class of FunctionNoProtoType and FunctionProtoType. 1726/// 1727class FunctionType : public Type { 1728 /// SubClassData - This field is owned by the subclass, put here to pack 1729 /// tightly with the ivars in Type. 1730 bool SubClassData : 1; 1731 1732 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1733 /// other bitfields. 1734 /// The qualifiers are part of FunctionProtoType because... 1735 /// 1736 /// C++ 8.3.5p4: The return type, the parameter type list and the 1737 /// cv-qualifier-seq, [...], are part of the function type. 1738 /// 1739 unsigned TypeQuals : 3; 1740 1741 /// NoReturn - Indicates if the function type is attribute noreturn. 1742 unsigned NoReturn : 1; 1743 1744 /// CallConv - The calling convention used by the function. 1745 unsigned CallConv : 2; 1746 1747 // The type returned by the function. 1748 QualType ResultType; 1749protected: 1750 FunctionType(TypeClass tc, QualType res, bool SubclassInfo, 1751 unsigned typeQuals, QualType Canonical, bool Dependent, 1752 bool noReturn = false, CallingConv callConv = CC_Default) 1753 : Type(tc, Canonical, Dependent), 1754 SubClassData(SubclassInfo), TypeQuals(typeQuals), NoReturn(noReturn), 1755 CallConv(callConv), ResultType(res) {} 1756 bool getSubClassData() const { return SubClassData; } 1757 unsigned getTypeQuals() const { return TypeQuals; } 1758public: 1759 1760 QualType getResultType() const { return ResultType; } 1761 bool getNoReturnAttr() const { return NoReturn; } 1762 CallingConv getCallConv() const { return (CallingConv)CallConv; } 1763 1764 static llvm::StringRef getNameForCallConv(CallingConv CC); 1765 1766 static bool classof(const Type *T) { 1767 return T->getTypeClass() == FunctionNoProto || 1768 T->getTypeClass() == FunctionProto; 1769 } 1770 static bool classof(const FunctionType *) { return true; } 1771}; 1772 1773/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 1774/// no information available about its arguments. 1775class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 1776 FunctionNoProtoType(QualType Result, QualType Canonical, 1777 bool NoReturn = false, CallingConv CallConv = CC_Default) 1778 : FunctionType(FunctionNoProto, Result, false, 0, Canonical, 1779 /*Dependent=*/false, NoReturn, CallConv) {} 1780 friend class ASTContext; // ASTContext creates these. 1781public: 1782 // No additional state past what FunctionType provides. 1783 1784 bool isSugared() const { return false; } 1785 QualType desugar() const { return QualType(this, 0); } 1786 1787 void Profile(llvm::FoldingSetNodeID &ID) { 1788 Profile(ID, getResultType(), getNoReturnAttr(), getCallConv()); 1789 } 1790 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 1791 bool NoReturn, CallingConv CallConv) { 1792 ID.AddInteger(CallConv); 1793 ID.AddInteger(NoReturn); 1794 ID.AddPointer(ResultType.getAsOpaquePtr()); 1795 } 1796 1797 virtual Linkage getLinkage() const; 1798 1799 static bool classof(const Type *T) { 1800 return T->getTypeClass() == FunctionNoProto; 1801 } 1802 static bool classof(const FunctionNoProtoType *) { return true; } 1803}; 1804 1805/// FunctionProtoType - Represents a prototype with argument type info, e.g. 1806/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 1807/// arguments, not as having a single void argument. Such a type can have an 1808/// exception specification, but this specification is not part of the canonical 1809/// type. 1810class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 1811 /// hasAnyDependentType - Determine whether there are any dependent 1812 /// types within the arguments passed in. 1813 static bool hasAnyDependentType(const QualType *ArgArray, unsigned numArgs) { 1814 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 1815 if (ArgArray[Idx]->isDependentType()) 1816 return true; 1817 1818 return false; 1819 } 1820 1821 FunctionProtoType(QualType Result, const QualType *ArgArray, unsigned numArgs, 1822 bool isVariadic, unsigned typeQuals, bool hasExs, 1823 bool hasAnyExs, const QualType *ExArray, 1824 unsigned numExs, QualType Canonical, bool NoReturn, 1825 CallingConv CallConv) 1826 : FunctionType(FunctionProto, Result, isVariadic, typeQuals, Canonical, 1827 (Result->isDependentType() || 1828 hasAnyDependentType(ArgArray, numArgs)), NoReturn, 1829 CallConv), 1830 NumArgs(numArgs), NumExceptions(numExs), HasExceptionSpec(hasExs), 1831 AnyExceptionSpec(hasAnyExs) { 1832 // Fill in the trailing argument array. 1833 QualType *ArgInfo = reinterpret_cast<QualType*>(this+1); 1834 for (unsigned i = 0; i != numArgs; ++i) 1835 ArgInfo[i] = ArgArray[i]; 1836 // Fill in the exception array. 1837 QualType *Ex = ArgInfo + numArgs; 1838 for (unsigned i = 0; i != numExs; ++i) 1839 Ex[i] = ExArray[i]; 1840 } 1841 1842 /// NumArgs - The number of arguments this function has, not counting '...'. 1843 unsigned NumArgs : 20; 1844 1845 /// NumExceptions - The number of types in the exception spec, if any. 1846 unsigned NumExceptions : 10; 1847 1848 /// HasExceptionSpec - Whether this function has an exception spec at all. 1849 bool HasExceptionSpec : 1; 1850 1851 /// AnyExceptionSpec - Whether this function has a throw(...) spec. 1852 bool AnyExceptionSpec : 1; 1853 1854 /// ArgInfo - There is an variable size array after the class in memory that 1855 /// holds the argument types. 1856 1857 /// Exceptions - There is another variable size array after ArgInfo that 1858 /// holds the exception types. 1859 1860 friend class ASTContext; // ASTContext creates these. 1861 1862public: 1863 unsigned getNumArgs() const { return NumArgs; } 1864 QualType getArgType(unsigned i) const { 1865 assert(i < NumArgs && "Invalid argument number!"); 1866 return arg_type_begin()[i]; 1867 } 1868 1869 bool hasExceptionSpec() const { return HasExceptionSpec; } 1870 bool hasAnyExceptionSpec() const { return AnyExceptionSpec; } 1871 unsigned getNumExceptions() const { return NumExceptions; } 1872 QualType getExceptionType(unsigned i) const { 1873 assert(i < NumExceptions && "Invalid exception number!"); 1874 return exception_begin()[i]; 1875 } 1876 bool hasEmptyExceptionSpec() const { 1877 return hasExceptionSpec() && !hasAnyExceptionSpec() && 1878 getNumExceptions() == 0; 1879 } 1880 1881 bool isVariadic() const { return getSubClassData(); } 1882 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 1883 1884 typedef const QualType *arg_type_iterator; 1885 arg_type_iterator arg_type_begin() const { 1886 return reinterpret_cast<const QualType *>(this+1); 1887 } 1888 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 1889 1890 typedef const QualType *exception_iterator; 1891 exception_iterator exception_begin() const { 1892 // exceptions begin where arguments end 1893 return arg_type_end(); 1894 } 1895 exception_iterator exception_end() const { 1896 return exception_begin() + NumExceptions; 1897 } 1898 1899 bool isSugared() const { return false; } 1900 QualType desugar() const { return QualType(this, 0); } 1901 1902 virtual Linkage getLinkage() const; 1903 1904 static bool classof(const Type *T) { 1905 return T->getTypeClass() == FunctionProto; 1906 } 1907 static bool classof(const FunctionProtoType *) { return true; } 1908 1909 void Profile(llvm::FoldingSetNodeID &ID); 1910 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 1911 arg_type_iterator ArgTys, unsigned NumArgs, 1912 bool isVariadic, unsigned TypeQuals, 1913 bool hasExceptionSpec, bool anyExceptionSpec, 1914 unsigned NumExceptions, exception_iterator Exs, 1915 bool NoReturn, CallingConv CallConv); 1916}; 1917 1918 1919/// \brief Represents the dependent type named by a dependently-scoped 1920/// typename using declaration, e.g. 1921/// using typename Base<T>::foo; 1922/// Template instantiation turns these into the underlying type. 1923class UnresolvedUsingType : public Type { 1924 UnresolvedUsingTypenameDecl *Decl; 1925 1926 UnresolvedUsingType(UnresolvedUsingTypenameDecl *D) 1927 : Type(UnresolvedUsing, QualType(), true), Decl(D) {} 1928 friend class ASTContext; // ASTContext creates these. 1929public: 1930 1931 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 1932 1933 bool isSugared() const { return false; } 1934 QualType desugar() const { return QualType(this, 0); } 1935 1936 static bool classof(const Type *T) { 1937 return T->getTypeClass() == UnresolvedUsing; 1938 } 1939 static bool classof(const UnresolvedUsingType *) { return true; } 1940 1941 void Profile(llvm::FoldingSetNodeID &ID) { 1942 return Profile(ID, Decl); 1943 } 1944 static void Profile(llvm::FoldingSetNodeID &ID, 1945 UnresolvedUsingTypenameDecl *D) { 1946 ID.AddPointer(D); 1947 } 1948}; 1949 1950 1951class TypedefType : public Type { 1952 TypedefDecl *Decl; 1953protected: 1954 TypedefType(TypeClass tc, TypedefDecl *D, QualType can) 1955 : Type(tc, can, can->isDependentType()), Decl(D) { 1956 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1957 } 1958 friend class ASTContext; // ASTContext creates these. 1959public: 1960 1961 TypedefDecl *getDecl() const { return Decl; } 1962 1963 /// LookThroughTypedefs - Return the ultimate type this typedef corresponds to 1964 /// potentially looking through *all* consecutive typedefs. This returns the 1965 /// sum of the type qualifiers, so if you have: 1966 /// typedef const int A; 1967 /// typedef volatile A B; 1968 /// looking through the typedefs for B will give you "const volatile A". 1969 QualType LookThroughTypedefs() const; 1970 1971 bool isSugared() const { return true; } 1972 QualType desugar() const; 1973 1974 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 1975 static bool classof(const TypedefType *) { return true; } 1976}; 1977 1978/// TypeOfExprType (GCC extension). 1979class TypeOfExprType : public Type { 1980 Expr *TOExpr; 1981 1982protected: 1983 TypeOfExprType(Expr *E, QualType can = QualType()); 1984 friend class ASTContext; // ASTContext creates these. 1985public: 1986 Expr *getUnderlyingExpr() const { return TOExpr; } 1987 1988 /// \brief Remove a single level of sugar. 1989 QualType desugar() const; 1990 1991 /// \brief Returns whether this type directly provides sugar. 1992 bool isSugared() const { return true; } 1993 1994 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 1995 static bool classof(const TypeOfExprType *) { return true; } 1996}; 1997 1998/// Subclass of TypeOfExprType that is used for canonical, dependent 1999/// typeof(expr) types. 2000class DependentTypeOfExprType 2001 : public TypeOfExprType, public llvm::FoldingSetNode { 2002 ASTContext &Context; 2003 2004public: 2005 DependentTypeOfExprType(ASTContext &Context, Expr *E) 2006 : TypeOfExprType(E), Context(Context) { } 2007 2008 bool isSugared() const { return false; } 2009 QualType desugar() const { return QualType(this, 0); } 2010 2011 void Profile(llvm::FoldingSetNodeID &ID) { 2012 Profile(ID, Context, getUnderlyingExpr()); 2013 } 2014 2015 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2016 Expr *E); 2017}; 2018 2019/// TypeOfType (GCC extension). 2020class TypeOfType : public Type { 2021 QualType TOType; 2022 TypeOfType(QualType T, QualType can) 2023 : Type(TypeOf, can, T->isDependentType()), TOType(T) { 2024 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2025 } 2026 friend class ASTContext; // ASTContext creates these. 2027public: 2028 QualType getUnderlyingType() const { return TOType; } 2029 2030 /// \brief Remove a single level of sugar. 2031 QualType desugar() const { return getUnderlyingType(); } 2032 2033 /// \brief Returns whether this type directly provides sugar. 2034 bool isSugared() const { return true; } 2035 2036 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 2037 static bool classof(const TypeOfType *) { return true; } 2038}; 2039 2040/// DecltypeType (C++0x) 2041class DecltypeType : public Type { 2042 Expr *E; 2043 2044 // FIXME: We could get rid of UnderlyingType if we wanted to: We would have to 2045 // Move getDesugaredType to ASTContext so that it can call getDecltypeForExpr 2046 // from it. 2047 QualType UnderlyingType; 2048 2049protected: 2050 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 2051 friend class ASTContext; // ASTContext creates these. 2052public: 2053 Expr *getUnderlyingExpr() const { return E; } 2054 QualType getUnderlyingType() const { return UnderlyingType; } 2055 2056 /// \brief Remove a single level of sugar. 2057 QualType desugar() const { return getUnderlyingType(); } 2058 2059 /// \brief Returns whether this type directly provides sugar. 2060 bool isSugared() const { return !isDependentType(); } 2061 2062 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 2063 static bool classof(const DecltypeType *) { return true; } 2064}; 2065 2066/// Subclass of DecltypeType that is used for canonical, dependent 2067/// C++0x decltype types. 2068class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 2069 ASTContext &Context; 2070 2071public: 2072 DependentDecltypeType(ASTContext &Context, Expr *E); 2073 2074 bool isSugared() const { return false; } 2075 QualType desugar() const { return QualType(this, 0); } 2076 2077 void Profile(llvm::FoldingSetNodeID &ID) { 2078 Profile(ID, Context, getUnderlyingExpr()); 2079 } 2080 2081 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2082 Expr *E); 2083}; 2084 2085class TagType : public Type { 2086 /// Stores the TagDecl associated with this type. The decl will 2087 /// point to the TagDecl that actually defines the entity (or is a 2088 /// definition in progress), if there is such a definition. The 2089 /// single-bit value will be non-zero when this tag is in the 2090 /// process of being defined. 2091 mutable llvm::PointerIntPair<TagDecl *, 1> decl; 2092 friend class ASTContext; 2093 friend class TagDecl; 2094 2095protected: 2096 TagType(TypeClass TC, TagDecl *D, QualType can); 2097 2098public: 2099 TagDecl *getDecl() const { return decl.getPointer(); } 2100 2101 /// @brief Determines whether this type is in the process of being 2102 /// defined. 2103 bool isBeingDefined() const { return decl.getInt(); } 2104 void setBeingDefined(bool Def) const { decl.setInt(Def? 1 : 0); } 2105 2106 virtual Linkage getLinkage() const; 2107 2108 static bool classof(const Type *T) { 2109 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 2110 } 2111 static bool classof(const TagType *) { return true; } 2112 static bool classof(const RecordType *) { return true; } 2113 static bool classof(const EnumType *) { return true; } 2114}; 2115 2116/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 2117/// to detect TagType objects of structs/unions/classes. 2118class RecordType : public TagType { 2119protected: 2120 explicit RecordType(RecordDecl *D) 2121 : TagType(Record, reinterpret_cast<TagDecl*>(D), QualType()) { } 2122 explicit RecordType(TypeClass TC, RecordDecl *D) 2123 : TagType(TC, reinterpret_cast<TagDecl*>(D), QualType()) { } 2124 friend class ASTContext; // ASTContext creates these. 2125public: 2126 2127 RecordDecl *getDecl() const { 2128 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 2129 } 2130 2131 // FIXME: This predicate is a helper to QualType/Type. It needs to 2132 // recursively check all fields for const-ness. If any field is declared 2133 // const, it needs to return false. 2134 bool hasConstFields() const { return false; } 2135 2136 // FIXME: RecordType needs to check when it is created that all fields are in 2137 // the same address space, and return that. 2138 unsigned getAddressSpace() const { return 0; } 2139 2140 bool isSugared() const { return false; } 2141 QualType desugar() const { return QualType(this, 0); } 2142 2143 static bool classof(const TagType *T); 2144 static bool classof(const Type *T) { 2145 return isa<TagType>(T) && classof(cast<TagType>(T)); 2146 } 2147 static bool classof(const RecordType *) { return true; } 2148}; 2149 2150/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 2151/// to detect TagType objects of enums. 2152class EnumType : public TagType { 2153 explicit EnumType(EnumDecl *D) 2154 : TagType(Enum, reinterpret_cast<TagDecl*>(D), QualType()) { } 2155 friend class ASTContext; // ASTContext creates these. 2156public: 2157 2158 EnumDecl *getDecl() const { 2159 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 2160 } 2161 2162 bool isSugared() const { return false; } 2163 QualType desugar() const { return QualType(this, 0); } 2164 2165 static bool classof(const TagType *T); 2166 static bool classof(const Type *T) { 2167 return isa<TagType>(T) && classof(cast<TagType>(T)); 2168 } 2169 static bool classof(const EnumType *) { return true; } 2170}; 2171 2172/// ElaboratedType - A non-canonical type used to represents uses of 2173/// elaborated type specifiers in C++. For example: 2174/// 2175/// void foo(union MyUnion); 2176/// ^^^^^^^^^^^^^ 2177/// 2178/// At the moment, for efficiency we do not create elaborated types in 2179/// C, since outside of typedefs all references to structs would 2180/// necessarily be elaborated. 2181class ElaboratedType : public Type, public llvm::FoldingSetNode { 2182public: 2183 enum TagKind { 2184 TK_struct, 2185 TK_union, 2186 TK_class, 2187 TK_enum 2188 }; 2189 2190private: 2191 /// The tag that was used in this elaborated type specifier. 2192 TagKind Tag; 2193 2194 /// The underlying type. 2195 QualType UnderlyingType; 2196 2197 explicit ElaboratedType(QualType Ty, TagKind Tag, QualType Canon) 2198 : Type(Elaborated, Canon, Canon->isDependentType()), 2199 Tag(Tag), UnderlyingType(Ty) { } 2200 friend class ASTContext; // ASTContext creates these. 2201 2202public: 2203 TagKind getTagKind() const { return Tag; } 2204 QualType getUnderlyingType() const { return UnderlyingType; } 2205 2206 /// \brief Remove a single level of sugar. 2207 QualType desugar() const { return getUnderlyingType(); } 2208 2209 /// \brief Returns whether this type directly provides sugar. 2210 bool isSugared() const { return true; } 2211 2212 static const char *getNameForTagKind(TagKind Kind) { 2213 switch (Kind) { 2214 default: assert(0 && "Unknown TagKind!"); 2215 case TK_struct: return "struct"; 2216 case TK_union: return "union"; 2217 case TK_class: return "class"; 2218 case TK_enum: return "enum"; 2219 } 2220 } 2221 2222 void Profile(llvm::FoldingSetNodeID &ID) { 2223 Profile(ID, getUnderlyingType(), getTagKind()); 2224 } 2225 static void Profile(llvm::FoldingSetNodeID &ID, QualType T, TagKind Tag) { 2226 ID.AddPointer(T.getAsOpaquePtr()); 2227 ID.AddInteger(Tag); 2228 } 2229 2230 static bool classof(const ElaboratedType*) { return true; } 2231 static bool classof(const Type *T) { return T->getTypeClass() == Elaborated; } 2232}; 2233 2234class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2235 unsigned Depth : 15; 2236 unsigned Index : 16; 2237 unsigned ParameterPack : 1; 2238 IdentifierInfo *Name; 2239 2240 TemplateTypeParmType(unsigned D, unsigned I, bool PP, IdentifierInfo *N, 2241 QualType Canon) 2242 : Type(TemplateTypeParm, Canon, /*Dependent=*/true), 2243 Depth(D), Index(I), ParameterPack(PP), Name(N) { } 2244 2245 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 2246 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true), 2247 Depth(D), Index(I), ParameterPack(PP), Name(0) { } 2248 2249 friend class ASTContext; // ASTContext creates these 2250 2251public: 2252 unsigned getDepth() const { return Depth; } 2253 unsigned getIndex() const { return Index; } 2254 bool isParameterPack() const { return ParameterPack; } 2255 IdentifierInfo *getName() const { return Name; } 2256 2257 bool isSugared() const { return false; } 2258 QualType desugar() const { return QualType(this, 0); } 2259 2260 void Profile(llvm::FoldingSetNodeID &ID) { 2261 Profile(ID, Depth, Index, ParameterPack, Name); 2262 } 2263 2264 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 2265 unsigned Index, bool ParameterPack, 2266 IdentifierInfo *Name) { 2267 ID.AddInteger(Depth); 2268 ID.AddInteger(Index); 2269 ID.AddBoolean(ParameterPack); 2270 ID.AddPointer(Name); 2271 } 2272 2273 static bool classof(const Type *T) { 2274 return T->getTypeClass() == TemplateTypeParm; 2275 } 2276 static bool classof(const TemplateTypeParmType *T) { return true; } 2277}; 2278 2279/// \brief Represents the result of substituting a type for a template 2280/// type parameter. 2281/// 2282/// Within an instantiated template, all template type parameters have 2283/// been replaced with these. They are used solely to record that a 2284/// type was originally written as a template type parameter; 2285/// therefore they are never canonical. 2286class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2287 // The original type parameter. 2288 const TemplateTypeParmType *Replaced; 2289 2290 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 2291 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType()), 2292 Replaced(Param) { } 2293 2294 friend class ASTContext; 2295 2296public: 2297 IdentifierInfo *getName() const { return Replaced->getName(); } 2298 2299 /// Gets the template parameter that was substituted for. 2300 const TemplateTypeParmType *getReplacedParameter() const { 2301 return Replaced; 2302 } 2303 2304 /// Gets the type that was substituted for the template 2305 /// parameter. 2306 QualType getReplacementType() const { 2307 return getCanonicalTypeInternal(); 2308 } 2309 2310 bool isSugared() const { return true; } 2311 QualType desugar() const { return getReplacementType(); } 2312 2313 void Profile(llvm::FoldingSetNodeID &ID) { 2314 Profile(ID, getReplacedParameter(), getReplacementType()); 2315 } 2316 static void Profile(llvm::FoldingSetNodeID &ID, 2317 const TemplateTypeParmType *Replaced, 2318 QualType Replacement) { 2319 ID.AddPointer(Replaced); 2320 ID.AddPointer(Replacement.getAsOpaquePtr()); 2321 } 2322 2323 static bool classof(const Type *T) { 2324 return T->getTypeClass() == SubstTemplateTypeParm; 2325 } 2326 static bool classof(const SubstTemplateTypeParmType *T) { return true; } 2327}; 2328 2329/// \brief Represents the type of a template specialization as written 2330/// in the source code. 2331/// 2332/// Template specialization types represent the syntactic form of a 2333/// template-id that refers to a type, e.g., @c vector<int>. Some 2334/// template specialization types are syntactic sugar, whose canonical 2335/// type will point to some other type node that represents the 2336/// instantiation or class template specialization. For example, a 2337/// class template specialization type of @c vector<int> will refer to 2338/// a tag type for the instantiation 2339/// @c std::vector<int, std::allocator<int>>. 2340/// 2341/// Other template specialization types, for which the template name 2342/// is dependent, may be canonical types. These types are always 2343/// dependent. 2344class TemplateSpecializationType 2345 : public Type, public llvm::FoldingSetNode { 2346 2347 // FIXME: Currently needed for profiling expressions; can we avoid this? 2348 ASTContext &Context; 2349 2350 /// \brief The name of the template being specialized. 2351 TemplateName Template; 2352 2353 /// \brief - The number of template arguments named in this class 2354 /// template specialization. 2355 unsigned NumArgs; 2356 2357 TemplateSpecializationType(ASTContext &Context, 2358 TemplateName T, 2359 const TemplateArgument *Args, 2360 unsigned NumArgs, QualType Canon); 2361 2362 virtual void Destroy(ASTContext& C); 2363 2364 friend class ASTContext; // ASTContext creates these 2365 2366public: 2367 /// \brief Determine whether any of the given template arguments are 2368 /// dependent. 2369 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 2370 unsigned NumArgs); 2371 2372 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 2373 unsigned NumArgs); 2374 2375 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &); 2376 2377 /// \brief Print a template argument list, including the '<' and '>' 2378 /// enclosing the template arguments. 2379 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 2380 unsigned NumArgs, 2381 const PrintingPolicy &Policy); 2382 2383 static std::string PrintTemplateArgumentList(const TemplateArgumentLoc *Args, 2384 unsigned NumArgs, 2385 const PrintingPolicy &Policy); 2386 2387 static std::string PrintTemplateArgumentList(const TemplateArgumentListInfo &, 2388 const PrintingPolicy &Policy); 2389 2390 typedef const TemplateArgument * iterator; 2391 2392 iterator begin() const { return getArgs(); } 2393 iterator end() const; 2394 2395 /// \brief Retrieve the name of the template that we are specializing. 2396 TemplateName getTemplateName() const { return Template; } 2397 2398 /// \brief Retrieve the template arguments. 2399 const TemplateArgument *getArgs() const { 2400 return reinterpret_cast<const TemplateArgument *>(this + 1); 2401 } 2402 2403 /// \brief Retrieve the number of template arguments. 2404 unsigned getNumArgs() const { return NumArgs; } 2405 2406 /// \brief Retrieve a specific template argument as a type. 2407 /// \precondition @c isArgType(Arg) 2408 const TemplateArgument &getArg(unsigned Idx) const; 2409 2410 bool isSugared() const { return !isDependentType(); } 2411 QualType desugar() const { return getCanonicalTypeInternal(); } 2412 2413 void Profile(llvm::FoldingSetNodeID &ID) { 2414 Profile(ID, Template, getArgs(), NumArgs, Context); 2415 } 2416 2417 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 2418 const TemplateArgument *Args, unsigned NumArgs, 2419 ASTContext &Context); 2420 2421 static bool classof(const Type *T) { 2422 return T->getTypeClass() == TemplateSpecialization; 2423 } 2424 static bool classof(const TemplateSpecializationType *T) { return true; } 2425}; 2426 2427/// \brief Represents a type that was referred to via a qualified 2428/// name, e.g., N::M::type. 2429/// 2430/// This type is used to keep track of a type name as written in the 2431/// source code, including any nested-name-specifiers. The type itself 2432/// is always "sugar", used to express what was written in the source 2433/// code but containing no additional semantic information. 2434class QualifiedNameType : public Type, public llvm::FoldingSetNode { 2435 /// \brief The nested name specifier containing the qualifier. 2436 NestedNameSpecifier *NNS; 2437 2438 /// \brief The type that this qualified name refers to. 2439 QualType NamedType; 2440 2441 QualifiedNameType(NestedNameSpecifier *NNS, QualType NamedType, 2442 QualType CanonType) 2443 : Type(QualifiedName, CanonType, NamedType->isDependentType()), 2444 NNS(NNS), NamedType(NamedType) { } 2445 2446 friend class ASTContext; // ASTContext creates these 2447 2448public: 2449 /// \brief Retrieve the qualification on this type. 2450 NestedNameSpecifier *getQualifier() const { return NNS; } 2451 2452 /// \brief Retrieve the type named by the qualified-id. 2453 QualType getNamedType() const { return NamedType; } 2454 2455 /// \brief Remove a single level of sugar. 2456 QualType desugar() const { return getNamedType(); } 2457 2458 /// \brief Returns whether this type directly provides sugar. 2459 bool isSugared() const { return true; } 2460 2461 void Profile(llvm::FoldingSetNodeID &ID) { 2462 Profile(ID, NNS, NamedType); 2463 } 2464 2465 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 2466 QualType NamedType) { 2467 ID.AddPointer(NNS); 2468 NamedType.Profile(ID); 2469 } 2470 2471 static bool classof(const Type *T) { 2472 return T->getTypeClass() == QualifiedName; 2473 } 2474 static bool classof(const QualifiedNameType *T) { return true; } 2475}; 2476 2477/// \brief Represents a 'typename' specifier that names a type within 2478/// a dependent type, e.g., "typename T::type". 2479/// 2480/// TypenameType has a very similar structure to QualifiedNameType, 2481/// which also involves a nested-name-specifier following by a type, 2482/// and (FIXME!) both can even be prefixed by the 'typename' 2483/// keyword. However, the two types serve very different roles: 2484/// QualifiedNameType is a non-semantic type that serves only as sugar 2485/// to show how a particular type was written in the source 2486/// code. TypenameType, on the other hand, only occurs when the 2487/// nested-name-specifier is dependent, such that we cannot resolve 2488/// the actual type until after instantiation. 2489class TypenameType : public Type, public llvm::FoldingSetNode { 2490 /// \brief The nested name specifier containing the qualifier. 2491 NestedNameSpecifier *NNS; 2492 2493 typedef llvm::PointerUnion<const IdentifierInfo *, 2494 const TemplateSpecializationType *> NameType; 2495 2496 /// \brief The type that this typename specifier refers to. 2497 NameType Name; 2498 2499 TypenameType(NestedNameSpecifier *NNS, const IdentifierInfo *Name, 2500 QualType CanonType) 2501 : Type(Typename, CanonType, true), NNS(NNS), Name(Name) { 2502 assert(NNS->isDependent() && 2503 "TypenameType requires a dependent nested-name-specifier"); 2504 } 2505 2506 TypenameType(NestedNameSpecifier *NNS, const TemplateSpecializationType *Ty, 2507 QualType CanonType) 2508 : Type(Typename, CanonType, true), NNS(NNS), Name(Ty) { 2509 assert(NNS->isDependent() && 2510 "TypenameType requires a dependent nested-name-specifier"); 2511 } 2512 2513 friend class ASTContext; // ASTContext creates these 2514 2515public: 2516 /// \brief Retrieve the qualification on this type. 2517 NestedNameSpecifier *getQualifier() const { return NNS; } 2518 2519 /// \brief Retrieve the type named by the typename specifier as an 2520 /// identifier. 2521 /// 2522 /// This routine will return a non-NULL identifier pointer when the 2523 /// form of the original typename was terminated by an identifier, 2524 /// e.g., "typename T::type". 2525 const IdentifierInfo *getIdentifier() const { 2526 return Name.dyn_cast<const IdentifierInfo *>(); 2527 } 2528 2529 /// \brief Retrieve the type named by the typename specifier as a 2530 /// type specialization. 2531 const TemplateSpecializationType *getTemplateId() const { 2532 return Name.dyn_cast<const TemplateSpecializationType *>(); 2533 } 2534 2535 bool isSugared() const { return false; } 2536 QualType desugar() const { return QualType(this, 0); } 2537 2538 void Profile(llvm::FoldingSetNodeID &ID) { 2539 Profile(ID, NNS, Name); 2540 } 2541 2542 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 2543 NameType Name) { 2544 ID.AddPointer(NNS); 2545 ID.AddPointer(Name.getOpaqueValue()); 2546 } 2547 2548 static bool classof(const Type *T) { 2549 return T->getTypeClass() == Typename; 2550 } 2551 static bool classof(const TypenameType *T) { return true; } 2552}; 2553 2554/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 2555/// object oriented design. They basically correspond to C++ classes. There 2556/// are two kinds of interface types, normal interfaces like "NSString" and 2557/// qualified interfaces, which are qualified with a protocol list like 2558/// "NSString<NSCopyable, NSAmazing>". 2559class ObjCInterfaceType : public Type, public llvm::FoldingSetNode { 2560 ObjCInterfaceDecl *Decl; 2561 2562 /// \brief The number of protocols stored after the ObjCInterfaceType node. 2563 /// The list of protocols is sorted on protocol name. No protocol is enterred 2564 /// more than once. 2565 unsigned NumProtocols; 2566 2567 ObjCInterfaceType(QualType Canonical, ObjCInterfaceDecl *D, 2568 ObjCProtocolDecl **Protos, unsigned NumP); 2569 friend class ASTContext; // ASTContext creates these. 2570public: 2571 void Destroy(ASTContext& C); 2572 2573 ObjCInterfaceDecl *getDecl() const { return Decl; } 2574 2575 /// getNumProtocols - Return the number of qualifying protocols in this 2576 /// interface type, or 0 if there are none. 2577 unsigned getNumProtocols() const { return NumProtocols; } 2578 2579 /// qual_iterator and friends: this provides access to the (potentially empty) 2580 /// list of protocols qualifying this interface. 2581 typedef ObjCProtocolDecl* const * qual_iterator; 2582 qual_iterator qual_begin() const { 2583 return reinterpret_cast<qual_iterator>(this + 1); 2584 } 2585 qual_iterator qual_end() const { 2586 return qual_begin() + NumProtocols; 2587 } 2588 bool qual_empty() const { return NumProtocols == 0; } 2589 2590 bool isSugared() const { return false; } 2591 QualType desugar() const { return QualType(this, 0); } 2592 2593 void Profile(llvm::FoldingSetNodeID &ID); 2594 static void Profile(llvm::FoldingSetNodeID &ID, 2595 const ObjCInterfaceDecl *Decl, 2596 ObjCProtocolDecl * const *protocols, 2597 unsigned NumProtocols); 2598 2599 virtual Linkage getLinkage() const; 2600 2601 static bool classof(const Type *T) { 2602 return T->getTypeClass() == ObjCInterface; 2603 } 2604 static bool classof(const ObjCInterfaceType *) { return true; } 2605}; 2606 2607/// ObjCObjectPointerType - Used to represent 'id', 'Interface *', 'id <p>', 2608/// and 'Interface <p> *'. 2609/// 2610/// Duplicate protocols are removed and protocol list is canonicalized to be in 2611/// alphabetical order. 2612class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 2613 QualType PointeeType; // A builtin or interface type. 2614 2615 /// \brief The number of protocols stored after the ObjCObjectPointerType 2616 /// node. 2617 /// 2618 /// The list of protocols is sorted on protocol name. No protocol is enterred 2619 /// more than once. 2620 unsigned NumProtocols; 2621 2622 ObjCObjectPointerType(QualType Canonical, QualType T, 2623 ObjCProtocolDecl **Protos, unsigned NumP); 2624 friend class ASTContext; // ASTContext creates these. 2625 2626public: 2627 void Destroy(ASTContext& C); 2628 2629 // Get the pointee type. Pointee will either be: 2630 // - a built-in type (for 'id' and 'Class'). 2631 // - an interface type (for user-defined types). 2632 // - a TypedefType whose canonical type is an interface (as in 'T' below). 2633 // For example: typedef NSObject T; T *var; 2634 QualType getPointeeType() const { return PointeeType; } 2635 2636 const ObjCInterfaceType *getInterfaceType() const { 2637 return PointeeType->getAs<ObjCInterfaceType>(); 2638 } 2639 /// getInterfaceDecl - returns an interface decl for user-defined types. 2640 ObjCInterfaceDecl *getInterfaceDecl() const { 2641 return getInterfaceType() ? getInterfaceType()->getDecl() : 0; 2642 } 2643 /// isObjCIdType - true for "id". 2644 bool isObjCIdType() const { 2645 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCId) && 2646 !NumProtocols; 2647 } 2648 /// isObjCClassType - true for "Class". 2649 bool isObjCClassType() const { 2650 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCClass) && 2651 !NumProtocols; 2652 } 2653 2654 /// isObjCQualifiedIdType - true for "id <p>". 2655 bool isObjCQualifiedIdType() const { 2656 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCId) && 2657 NumProtocols; 2658 } 2659 /// isObjCQualifiedClassType - true for "Class <p>". 2660 bool isObjCQualifiedClassType() const { 2661 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCClass) && 2662 NumProtocols; 2663 } 2664 /// qual_iterator and friends: this provides access to the (potentially empty) 2665 /// list of protocols qualifying this interface. 2666 typedef ObjCProtocolDecl* const * qual_iterator; 2667 2668 qual_iterator qual_begin() const { 2669 return reinterpret_cast<qual_iterator> (this + 1); 2670 } 2671 qual_iterator qual_end() const { 2672 return qual_begin() + NumProtocols; 2673 } 2674 bool qual_empty() const { return NumProtocols == 0; } 2675 2676 /// getNumProtocols - Return the number of qualifying protocols in this 2677 /// interface type, or 0 if there are none. 2678 unsigned getNumProtocols() const { return NumProtocols; } 2679 2680 bool isSugared() const { return false; } 2681 QualType desugar() const { return QualType(this, 0); } 2682 2683 virtual Linkage getLinkage() const; 2684 2685 void Profile(llvm::FoldingSetNodeID &ID); 2686 static void Profile(llvm::FoldingSetNodeID &ID, QualType T, 2687 ObjCProtocolDecl *const *protocols, 2688 unsigned NumProtocols); 2689 static bool classof(const Type *T) { 2690 return T->getTypeClass() == ObjCObjectPointer; 2691 } 2692 static bool classof(const ObjCObjectPointerType *) { return true; } 2693}; 2694 2695/// A qualifier set is used to build a set of qualifiers. 2696class QualifierCollector : public Qualifiers { 2697 ASTContext *Context; 2698 2699public: 2700 QualifierCollector(Qualifiers Qs = Qualifiers()) 2701 : Qualifiers(Qs), Context(0) {} 2702 QualifierCollector(ASTContext &Context, Qualifiers Qs = Qualifiers()) 2703 : Qualifiers(Qs), Context(&Context) {} 2704 2705 void setContext(ASTContext &C) { Context = &C; } 2706 2707 /// Collect any qualifiers on the given type and return an 2708 /// unqualified type. 2709 const Type *strip(QualType QT) { 2710 addFastQualifiers(QT.getLocalFastQualifiers()); 2711 if (QT.hasLocalNonFastQualifiers()) { 2712 const ExtQuals *EQ = QT.getExtQualsUnsafe(); 2713 Context = &EQ->getContext(); 2714 addQualifiers(EQ->getQualifiers()); 2715 return EQ->getBaseType(); 2716 } 2717 return QT.getTypePtrUnsafe(); 2718 } 2719 2720 /// Apply the collected qualifiers to the given type. 2721 QualType apply(QualType QT) const; 2722 2723 /// Apply the collected qualifiers to the given type. 2724 QualType apply(const Type* T) const; 2725 2726}; 2727 2728 2729// Inline function definitions. 2730 2731inline bool QualType::isCanonical() const { 2732 const Type *T = getTypePtr(); 2733 if (hasLocalQualifiers()) 2734 return T->isCanonicalUnqualified() && !isa<ArrayType>(T); 2735 return T->isCanonicalUnqualified(); 2736} 2737 2738inline bool QualType::isCanonicalAsParam() const { 2739 if (hasLocalQualifiers()) return false; 2740 const Type *T = getTypePtr(); 2741 return T->isCanonicalUnqualified() && 2742 !isa<FunctionType>(T) && !isa<ArrayType>(T); 2743} 2744 2745inline bool QualType::isConstQualified() const { 2746 return isLocalConstQualified() || 2747 getTypePtr()->getCanonicalTypeInternal().isLocalConstQualified(); 2748} 2749 2750inline bool QualType::isRestrictQualified() const { 2751 return isLocalRestrictQualified() || 2752 getTypePtr()->getCanonicalTypeInternal().isLocalRestrictQualified(); 2753} 2754 2755 2756inline bool QualType::isVolatileQualified() const { 2757 return isLocalVolatileQualified() || 2758 getTypePtr()->getCanonicalTypeInternal().isLocalVolatileQualified(); 2759} 2760 2761inline bool QualType::hasQualifiers() const { 2762 return hasLocalQualifiers() || 2763 getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers(); 2764} 2765 2766inline Qualifiers QualType::getQualifiers() const { 2767 Qualifiers Quals = getLocalQualifiers(); 2768 Quals.addQualifiers( 2769 getTypePtr()->getCanonicalTypeInternal().getLocalQualifiers()); 2770 return Quals; 2771} 2772 2773inline unsigned QualType::getCVRQualifiers() const { 2774 return getLocalCVRQualifiers() | 2775 getTypePtr()->getCanonicalTypeInternal().getLocalCVRQualifiers(); 2776} 2777 2778/// getCVRQualifiersThroughArrayTypes - If there are CVR qualifiers for this 2779/// type, returns them. Otherwise, if this is an array type, recurses 2780/// on the element type until some qualifiers have been found or a non-array 2781/// type reached. 2782inline unsigned QualType::getCVRQualifiersThroughArrayTypes() const { 2783 if (unsigned Quals = getCVRQualifiers()) 2784 return Quals; 2785 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2786 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 2787 return AT->getElementType().getCVRQualifiersThroughArrayTypes(); 2788 return 0; 2789} 2790 2791inline void QualType::removeConst() { 2792 removeFastQualifiers(Qualifiers::Const); 2793} 2794 2795inline void QualType::removeRestrict() { 2796 removeFastQualifiers(Qualifiers::Restrict); 2797} 2798 2799inline void QualType::removeVolatile() { 2800 QualifierCollector Qc; 2801 const Type *Ty = Qc.strip(*this); 2802 if (Qc.hasVolatile()) { 2803 Qc.removeVolatile(); 2804 *this = Qc.apply(Ty); 2805 } 2806} 2807 2808inline void QualType::removeCVRQualifiers(unsigned Mask) { 2809 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 2810 2811 // Fast path: we don't need to touch the slow qualifiers. 2812 if (!(Mask & ~Qualifiers::FastMask)) { 2813 removeFastQualifiers(Mask); 2814 return; 2815 } 2816 2817 QualifierCollector Qc; 2818 const Type *Ty = Qc.strip(*this); 2819 Qc.removeCVRQualifiers(Mask); 2820 *this = Qc.apply(Ty); 2821} 2822 2823/// getAddressSpace - Return the address space of this type. 2824inline unsigned QualType::getAddressSpace() const { 2825 if (hasLocalNonFastQualifiers()) { 2826 const ExtQuals *EQ = getExtQualsUnsafe(); 2827 if (EQ->hasAddressSpace()) 2828 return EQ->getAddressSpace(); 2829 } 2830 2831 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2832 if (CT.hasLocalNonFastQualifiers()) { 2833 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 2834 if (EQ->hasAddressSpace()) 2835 return EQ->getAddressSpace(); 2836 } 2837 2838 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 2839 return AT->getElementType().getAddressSpace(); 2840 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 2841 return RT->getAddressSpace(); 2842 return 0; 2843} 2844 2845/// getObjCGCAttr - Return the gc attribute of this type. 2846inline Qualifiers::GC QualType::getObjCGCAttr() const { 2847 if (hasLocalNonFastQualifiers()) { 2848 const ExtQuals *EQ = getExtQualsUnsafe(); 2849 if (EQ->hasObjCGCAttr()) 2850 return EQ->getObjCGCAttr(); 2851 } 2852 2853 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2854 if (CT.hasLocalNonFastQualifiers()) { 2855 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 2856 if (EQ->hasObjCGCAttr()) 2857 return EQ->getObjCGCAttr(); 2858 } 2859 2860 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 2861 return AT->getElementType().getObjCGCAttr(); 2862 if (const ObjCObjectPointerType *PT = CT->getAs<ObjCObjectPointerType>()) 2863 return PT->getPointeeType().getObjCGCAttr(); 2864 // We most look at all pointer types, not just pointer to interface types. 2865 if (const PointerType *PT = CT->getAs<PointerType>()) 2866 return PT->getPointeeType().getObjCGCAttr(); 2867 return Qualifiers::GCNone; 2868} 2869 2870 /// getNoReturnAttr - Returns true if the type has the noreturn attribute, 2871 /// false otherwise. 2872inline bool QualType::getNoReturnAttr() const { 2873 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2874 if (const PointerType *PT = getTypePtr()->getAs<PointerType>()) { 2875 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 2876 return FT->getNoReturnAttr(); 2877 } else if (const FunctionType *FT = getTypePtr()->getAs<FunctionType>()) 2878 return FT->getNoReturnAttr(); 2879 2880 return false; 2881} 2882 2883/// getCallConv - Returns the calling convention of the type if the type 2884/// is a function type, CC_Default otherwise. 2885inline CallingConv QualType::getCallConv() const { 2886 if (const PointerType *PT = getTypePtr()->getAs<PointerType>()) 2887 return PT->getPointeeType().getCallConv(); 2888 else if (const ReferenceType *RT = getTypePtr()->getAs<ReferenceType>()) 2889 return RT->getPointeeType().getCallConv(); 2890 else if (const MemberPointerType *MPT = 2891 getTypePtr()->getAs<MemberPointerType>()) 2892 return MPT->getPointeeType().getCallConv(); 2893 else if (const BlockPointerType *BPT = 2894 getTypePtr()->getAs<BlockPointerType>()) { 2895 if (const FunctionType *FT = BPT->getPointeeType()->getAs<FunctionType>()) 2896 return FT->getCallConv(); 2897 } else if (const FunctionType *FT = getTypePtr()->getAs<FunctionType>()) 2898 return FT->getCallConv(); 2899 2900 return CC_Default; 2901} 2902 2903/// isMoreQualifiedThan - Determine whether this type is more 2904/// qualified than the Other type. For example, "const volatile int" 2905/// is more qualified than "const int", "volatile int", and 2906/// "int". However, it is not more qualified than "const volatile 2907/// int". 2908inline bool QualType::isMoreQualifiedThan(QualType Other) const { 2909 // FIXME: work on arbitrary qualifiers 2910 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 2911 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 2912 if (getAddressSpace() != Other.getAddressSpace()) 2913 return false; 2914 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 2915} 2916 2917/// isAtLeastAsQualifiedAs - Determine whether this type is at last 2918/// as qualified as the Other type. For example, "const volatile 2919/// int" is at least as qualified as "const int", "volatile int", 2920/// "int", and "const volatile int". 2921inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 2922 // FIXME: work on arbitrary qualifiers 2923 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 2924 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 2925 if (getAddressSpace() != Other.getAddressSpace()) 2926 return false; 2927 return (MyQuals | OtherQuals) == MyQuals; 2928} 2929 2930/// getNonReferenceType - If Type is a reference type (e.g., const 2931/// int&), returns the type that the reference refers to ("const 2932/// int"). Otherwise, returns the type itself. This routine is used 2933/// throughout Sema to implement C++ 5p6: 2934/// 2935/// If an expression initially has the type "reference to T" (8.3.2, 2936/// 8.5.3), the type is adjusted to "T" prior to any further 2937/// analysis, the expression designates the object or function 2938/// denoted by the reference, and the expression is an lvalue. 2939inline QualType QualType::getNonReferenceType() const { 2940 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 2941 return RefType->getPointeeType(); 2942 else 2943 return *this; 2944} 2945 2946inline const ObjCInterfaceType *Type::getAsPointerToObjCInterfaceType() const { 2947 if (const PointerType *PT = getAs<PointerType>()) 2948 return PT->getPointeeType()->getAs<ObjCInterfaceType>(); 2949 return 0; 2950} 2951 2952inline bool Type::isFunctionType() const { 2953 return isa<FunctionType>(CanonicalType); 2954} 2955inline bool Type::isPointerType() const { 2956 return isa<PointerType>(CanonicalType); 2957} 2958inline bool Type::isAnyPointerType() const { 2959 return isPointerType() || isObjCObjectPointerType(); 2960} 2961inline bool Type::isBlockPointerType() const { 2962 return isa<BlockPointerType>(CanonicalType); 2963} 2964inline bool Type::isReferenceType() const { 2965 return isa<ReferenceType>(CanonicalType); 2966} 2967inline bool Type::isLValueReferenceType() const { 2968 return isa<LValueReferenceType>(CanonicalType); 2969} 2970inline bool Type::isRValueReferenceType() const { 2971 return isa<RValueReferenceType>(CanonicalType); 2972} 2973inline bool Type::isFunctionPointerType() const { 2974 if (const PointerType* T = getAs<PointerType>()) 2975 return T->getPointeeType()->isFunctionType(); 2976 else 2977 return false; 2978} 2979inline bool Type::isMemberPointerType() const { 2980 return isa<MemberPointerType>(CanonicalType); 2981} 2982inline bool Type::isMemberFunctionPointerType() const { 2983 if (const MemberPointerType* T = getAs<MemberPointerType>()) 2984 return T->getPointeeType()->isFunctionType(); 2985 else 2986 return false; 2987} 2988inline bool Type::isArrayType() const { 2989 return isa<ArrayType>(CanonicalType); 2990} 2991inline bool Type::isConstantArrayType() const { 2992 return isa<ConstantArrayType>(CanonicalType); 2993} 2994inline bool Type::isIncompleteArrayType() const { 2995 return isa<IncompleteArrayType>(CanonicalType); 2996} 2997inline bool Type::isVariableArrayType() const { 2998 return isa<VariableArrayType>(CanonicalType); 2999} 3000inline bool Type::isDependentSizedArrayType() const { 3001 return isa<DependentSizedArrayType>(CanonicalType); 3002} 3003inline bool Type::isRecordType() const { 3004 return isa<RecordType>(CanonicalType); 3005} 3006inline bool Type::isAnyComplexType() const { 3007 return isa<ComplexType>(CanonicalType); 3008} 3009inline bool Type::isVectorType() const { 3010 return isa<VectorType>(CanonicalType); 3011} 3012inline bool Type::isExtVectorType() const { 3013 return isa<ExtVectorType>(CanonicalType); 3014} 3015inline bool Type::isObjCObjectPointerType() const { 3016 return isa<ObjCObjectPointerType>(CanonicalType); 3017} 3018inline bool Type::isObjCInterfaceType() const { 3019 return isa<ObjCInterfaceType>(CanonicalType); 3020} 3021inline bool Type::isObjCQualifiedIdType() const { 3022 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3023 return OPT->isObjCQualifiedIdType(); 3024 return false; 3025} 3026inline bool Type::isObjCQualifiedClassType() const { 3027 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3028 return OPT->isObjCQualifiedClassType(); 3029 return false; 3030} 3031inline bool Type::isObjCIdType() const { 3032 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3033 return OPT->isObjCIdType(); 3034 return false; 3035} 3036inline bool Type::isObjCClassType() const { 3037 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3038 return OPT->isObjCClassType(); 3039 return false; 3040} 3041inline bool Type::isObjCSelType() const { 3042 if (const PointerType *OPT = getAs<PointerType>()) 3043 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 3044 return false; 3045} 3046inline bool Type::isObjCBuiltinType() const { 3047 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 3048} 3049inline bool Type::isTemplateTypeParmType() const { 3050 return isa<TemplateTypeParmType>(CanonicalType); 3051} 3052 3053inline bool Type::isSpecificBuiltinType(unsigned K) const { 3054 if (const BuiltinType *BT = getAs<BuiltinType>()) 3055 if (BT->getKind() == (BuiltinType::Kind) K) 3056 return true; 3057 return false; 3058} 3059 3060/// \brief Determines whether this is a type for which one can define 3061/// an overloaded operator. 3062inline bool Type::isOverloadableType() const { 3063 return isDependentType() || isRecordType() || isEnumeralType(); 3064} 3065 3066inline bool Type::hasPointerRepresentation() const { 3067 return (isPointerType() || isReferenceType() || isBlockPointerType() || 3068 isObjCInterfaceType() || isObjCObjectPointerType() || 3069 isObjCQualifiedInterfaceType() || isNullPtrType()); 3070} 3071 3072inline bool Type::hasObjCPointerRepresentation() const { 3073 return (isObjCInterfaceType() || isObjCObjectPointerType() || 3074 isObjCQualifiedInterfaceType()); 3075} 3076 3077/// Insertion operator for diagnostics. This allows sending QualType's into a 3078/// diagnostic with <<. 3079inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 3080 QualType T) { 3081 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 3082 Diagnostic::ak_qualtype); 3083 return DB; 3084} 3085 3086// Helper class template that is used by Type::getAs to ensure that one does 3087// not try to look through a qualified type to get to an array type. 3088template<typename T, 3089 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 3090 llvm::is_base_of<ArrayType, T>::value)> 3091struct ArrayType_cannot_be_used_with_getAs { }; 3092 3093template<typename T> 3094struct ArrayType_cannot_be_used_with_getAs<T, true>; 3095 3096/// Member-template getAs<specific type>'. 3097template <typename T> const T *Type::getAs() const { 3098 ArrayType_cannot_be_used_with_getAs<T> at; 3099 (void)at; 3100 3101 // If this is directly a T type, return it. 3102 if (const T *Ty = dyn_cast<T>(this)) 3103 return Ty; 3104 3105 // If the canonical form of this type isn't the right kind, reject it. 3106 if (!isa<T>(CanonicalType)) 3107 return 0; 3108 3109 // If this is a typedef for the type, strip the typedef off without 3110 // losing all typedef information. 3111 return cast<T>(getUnqualifiedDesugaredType()); 3112} 3113 3114} // end namespace clang 3115 3116#endif 3117