Type.h revision 725b41e4eefc6d19b6215f24489acbc2e1641765
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/Statistics.h" 22#include "clang/AST/TemplateName.h" 23#include "llvm/Support/Casting.h" 24#include "llvm/Support/type_traits.h" 25#include "llvm/ADT/APSInt.h" 26#include "llvm/ADT/FoldingSet.h" 27#include "llvm/ADT/PointerIntPair.h" 28#include "llvm/ADT/PointerUnion.h" 29 30using llvm::isa; 31using llvm::cast; 32using llvm::cast_or_null; 33using llvm::dyn_cast; 34using llvm::dyn_cast_or_null; 35namespace clang { 36 enum { 37 TypeAlignmentInBits = 3, 38 TypeAlignment = 1 << TypeAlignmentInBits 39 }; 40 class Type; 41 class ExtQuals; 42 class QualType; 43} 44 45namespace llvm { 46 template <typename T> 47 class PointerLikeTypeTraits; 48 template<> 49 class PointerLikeTypeTraits< ::clang::Type*> { 50 public: 51 static inline void *getAsVoidPointer(::clang::Type *P) { return P; } 52 static inline ::clang::Type *getFromVoidPointer(void *P) { 53 return static_cast< ::clang::Type*>(P); 54 } 55 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 56 }; 57 template<> 58 class PointerLikeTypeTraits< ::clang::ExtQuals*> { 59 public: 60 static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; } 61 static inline ::clang::ExtQuals *getFromVoidPointer(void *P) { 62 return static_cast< ::clang::ExtQuals*>(P); 63 } 64 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 65 }; 66 67 template <> 68 struct isPodLike<clang::QualType> { static const bool value = true; }; 69} 70 71namespace clang { 72 class ASTContext; 73 class TypedefDecl; 74 class TemplateDecl; 75 class TemplateTypeParmDecl; 76 class NonTypeTemplateParmDecl; 77 class TemplateTemplateParmDecl; 78 class TagDecl; 79 class RecordDecl; 80 class CXXRecordDecl; 81 class EnumDecl; 82 class FieldDecl; 83 class ObjCInterfaceDecl; 84 class ObjCProtocolDecl; 85 class ObjCMethodDecl; 86 class UnresolvedUsingTypenameDecl; 87 class Expr; 88 class Stmt; 89 class SourceLocation; 90 class StmtIteratorBase; 91 class TemplateArgument; 92 class TemplateArgumentLoc; 93 class TemplateArgumentListInfo; 94 class Type; 95 class QualifiedNameType; 96 struct PrintingPolicy; 97 98 template <typename> class CanQual; 99 typedef CanQual<Type> CanQualType; 100 101 // Provide forward declarations for all of the *Type classes 102#define TYPE(Class, Base) class Class##Type; 103#include "clang/AST/TypeNodes.def" 104 105/// Qualifiers - The collection of all-type qualifiers we support. 106/// Clang supports five independent qualifiers: 107/// * C99: const, volatile, and restrict 108/// * Embedded C (TR18037): address spaces 109/// * Objective C: the GC attributes (none, weak, or strong) 110class Qualifiers { 111public: 112 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 113 Const = 0x1, 114 Restrict = 0x2, 115 Volatile = 0x4, 116 CVRMask = Const | Volatile | Restrict 117 }; 118 119 enum GC { 120 GCNone = 0, 121 Weak, 122 Strong 123 }; 124 125 enum { 126 /// The maximum supported address space number. 127 /// 24 bits should be enough for anyone. 128 MaxAddressSpace = 0xffffffu, 129 130 /// The width of the "fast" qualifier mask. 131 FastWidth = 2, 132 133 /// The fast qualifier mask. 134 FastMask = (1 << FastWidth) - 1 135 }; 136 137 Qualifiers() : Mask(0) {} 138 139 static Qualifiers fromFastMask(unsigned Mask) { 140 Qualifiers Qs; 141 Qs.addFastQualifiers(Mask); 142 return Qs; 143 } 144 145 static Qualifiers fromCVRMask(unsigned CVR) { 146 Qualifiers Qs; 147 Qs.addCVRQualifiers(CVR); 148 return Qs; 149 } 150 151 // Deserialize qualifiers from an opaque representation. 152 static Qualifiers fromOpaqueValue(unsigned opaque) { 153 Qualifiers Qs; 154 Qs.Mask = opaque; 155 return Qs; 156 } 157 158 // Serialize these qualifiers into an opaque representation. 159 unsigned getAsOpaqueValue() const { 160 return Mask; 161 } 162 163 bool hasConst() const { return Mask & Const; } 164 void setConst(bool flag) { 165 Mask = (Mask & ~Const) | (flag ? Const : 0); 166 } 167 void removeConst() { Mask &= ~Const; } 168 void addConst() { Mask |= Const; } 169 170 bool hasVolatile() const { return Mask & Volatile; } 171 void setVolatile(bool flag) { 172 Mask = (Mask & ~Volatile) | (flag ? Volatile : 0); 173 } 174 void removeVolatile() { Mask &= ~Volatile; } 175 void addVolatile() { Mask |= Volatile; } 176 177 bool hasRestrict() const { return Mask & Restrict; } 178 void setRestrict(bool flag) { 179 Mask = (Mask & ~Restrict) | (flag ? Restrict : 0); 180 } 181 void removeRestrict() { Mask &= ~Restrict; } 182 void addRestrict() { Mask |= Restrict; } 183 184 bool hasCVRQualifiers() const { return getCVRQualifiers(); } 185 unsigned getCVRQualifiers() const { return Mask & CVRMask; } 186 void setCVRQualifiers(unsigned mask) { 187 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 188 Mask = (Mask & ~CVRMask) | mask; 189 } 190 void removeCVRQualifiers(unsigned mask) { 191 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 192 Mask &= ~mask; 193 } 194 void removeCVRQualifiers() { 195 removeCVRQualifiers(CVRMask); 196 } 197 void addCVRQualifiers(unsigned mask) { 198 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 199 Mask |= mask; 200 } 201 202 bool hasObjCGCAttr() const { return Mask & GCAttrMask; } 203 GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); } 204 void setObjCGCAttr(GC type) { 205 Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift); 206 } 207 void removeObjCGCAttr() { setObjCGCAttr(GCNone); } 208 void addObjCGCAttr(GC type) { 209 assert(type); 210 setObjCGCAttr(type); 211 } 212 213 bool hasAddressSpace() const { return Mask & AddressSpaceMask; } 214 unsigned getAddressSpace() const { return Mask >> AddressSpaceShift; } 215 void setAddressSpace(unsigned space) { 216 assert(space <= MaxAddressSpace); 217 Mask = (Mask & ~AddressSpaceMask) 218 | (((uint32_t) space) << AddressSpaceShift); 219 } 220 void removeAddressSpace() { setAddressSpace(0); } 221 void addAddressSpace(unsigned space) { 222 assert(space); 223 setAddressSpace(space); 224 } 225 226 // Fast qualifiers are those that can be allocated directly 227 // on a QualType object. 228 bool hasFastQualifiers() const { return getFastQualifiers(); } 229 unsigned getFastQualifiers() const { return Mask & FastMask; } 230 void setFastQualifiers(unsigned mask) { 231 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 232 Mask = (Mask & ~FastMask) | mask; 233 } 234 void removeFastQualifiers(unsigned mask) { 235 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 236 Mask &= ~mask; 237 } 238 void removeFastQualifiers() { 239 removeFastQualifiers(FastMask); 240 } 241 void addFastQualifiers(unsigned mask) { 242 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 243 Mask |= mask; 244 } 245 246 /// hasNonFastQualifiers - Return true if the set contains any 247 /// qualifiers which require an ExtQuals node to be allocated. 248 bool hasNonFastQualifiers() const { return Mask & ~FastMask; } 249 Qualifiers getNonFastQualifiers() const { 250 Qualifiers Quals = *this; 251 Quals.setFastQualifiers(0); 252 return Quals; 253 } 254 255 /// hasQualifiers - Return true if the set contains any qualifiers. 256 bool hasQualifiers() const { return Mask; } 257 bool empty() const { return !Mask; } 258 259 /// \brief Add the qualifiers from the given set to this set. 260 void addQualifiers(Qualifiers Q) { 261 // If the other set doesn't have any non-boolean qualifiers, just 262 // bit-or it in. 263 if (!(Q.Mask & ~CVRMask)) 264 Mask |= Q.Mask; 265 else { 266 Mask |= (Q.Mask & CVRMask); 267 if (Q.hasAddressSpace()) 268 addAddressSpace(Q.getAddressSpace()); 269 if (Q.hasObjCGCAttr()) 270 addObjCGCAttr(Q.getObjCGCAttr()); 271 } 272 } 273 274 bool operator==(Qualifiers Other) const { return Mask == Other.Mask; } 275 bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; } 276 277 operator bool() const { return hasQualifiers(); } 278 279 Qualifiers &operator+=(Qualifiers R) { 280 addQualifiers(R); 281 return *this; 282 } 283 284 // Union two qualifier sets. If an enumerated qualifier appears 285 // in both sets, use the one from the right. 286 friend Qualifiers operator+(Qualifiers L, Qualifiers R) { 287 L += R; 288 return L; 289 } 290 291 std::string getAsString() const; 292 std::string getAsString(const PrintingPolicy &Policy) const { 293 std::string Buffer; 294 getAsStringInternal(Buffer, Policy); 295 return Buffer; 296 } 297 void getAsStringInternal(std::string &S, const PrintingPolicy &Policy) const; 298 299 void Profile(llvm::FoldingSetNodeID &ID) const { 300 ID.AddInteger(Mask); 301 } 302 303private: 304 305 // bits: |0 1 2|3 .. 4|5 .. 31| 306 // |C R V|GCAttr|AddrSpace| 307 uint32_t Mask; 308 309 static const uint32_t GCAttrMask = 0x18; 310 static const uint32_t GCAttrShift = 3; 311 static const uint32_t AddressSpaceMask = ~(CVRMask | GCAttrMask); 312 static const uint32_t AddressSpaceShift = 5; 313}; 314 315 316/// ExtQuals - We can encode up to three bits in the low bits of a 317/// type pointer, but there are many more type qualifiers that we want 318/// to be able to apply to an arbitrary type. Therefore we have this 319/// struct, intended to be heap-allocated and used by QualType to 320/// store qualifiers. 321/// 322/// The current design tags the 'const' and 'restrict' qualifiers in 323/// two low bits on the QualType pointer; a third bit records whether 324/// the pointer is an ExtQuals node. 'const' was chosen because it is 325/// orders of magnitude more common than the other two qualifiers, in 326/// both library and user code. It's relatively rare to see 327/// 'restrict' in user code, but many standard C headers are saturated 328/// with 'restrict' declarations, so that representing them efficiently 329/// is a critical goal of this representation. 330class ExtQuals : public llvm::FoldingSetNode { 331 // NOTE: changing the fast qualifiers should be straightforward as 332 // long as you don't make 'const' non-fast. 333 // 1. Qualifiers: 334 // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). 335 // Fast qualifiers must occupy the low-order bits. 336 // b) Update Qualifiers::FastWidth and FastMask. 337 // 2. QualType: 338 // a) Update is{Volatile,Restrict}Qualified(), defined inline. 339 // b) Update remove{Volatile,Restrict}, defined near the end of 340 // this header. 341 // 3. ASTContext: 342 // a) Update get{Volatile,Restrict}Type. 343 344 /// Context - the context to which this set belongs. We save this 345 /// here so that QualifierCollector can use it to reapply extended 346 /// qualifiers to an arbitrary type without requiring a context to 347 /// be pushed through every single API dealing with qualifiers. 348 ASTContext& Context; 349 350 /// BaseType - the underlying type that this qualifies 351 const Type *BaseType; 352 353 /// Quals - the immutable set of qualifiers applied by this 354 /// node; always contains extended qualifiers. 355 Qualifiers Quals; 356 357public: 358 ExtQuals(ASTContext& Context, const Type *Base, Qualifiers Quals) 359 : Context(Context), BaseType(Base), Quals(Quals) 360 { 361 assert(Quals.hasNonFastQualifiers() 362 && "ExtQuals created with no fast qualifiers"); 363 assert(!Quals.hasFastQualifiers() 364 && "ExtQuals created with fast qualifiers"); 365 } 366 367 Qualifiers getQualifiers() const { return Quals; } 368 369 bool hasVolatile() const { return Quals.hasVolatile(); } 370 371 bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } 372 Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } 373 374 bool hasAddressSpace() const { return Quals.hasAddressSpace(); } 375 unsigned getAddressSpace() const { return Quals.getAddressSpace(); } 376 377 const Type *getBaseType() const { return BaseType; } 378 379 ASTContext &getContext() const { return Context; } 380 381public: 382 void Profile(llvm::FoldingSetNodeID &ID) const { 383 Profile(ID, getBaseType(), Quals); 384 } 385 static void Profile(llvm::FoldingSetNodeID &ID, 386 const Type *BaseType, 387 Qualifiers Quals) { 388 assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!"); 389 ID.AddPointer(BaseType); 390 Quals.Profile(ID); 391 } 392}; 393 394/// CallingConv - Specifies the calling convention that a function uses. 395enum CallingConv { 396 CC_Default, 397 CC_C, // __attribute__((cdecl)) 398 CC_X86StdCall, // __attribute__((stdcall)) 399 CC_X86FastCall // __attribute__((fastcall)) 400}; 401 402 403/// QualType - For efficiency, we don't store CV-qualified types as nodes on 404/// their own: instead each reference to a type stores the qualifiers. This 405/// greatly reduces the number of nodes we need to allocate for types (for 406/// example we only need one for 'int', 'const int', 'volatile int', 407/// 'const volatile int', etc). 408/// 409/// As an added efficiency bonus, instead of making this a pair, we 410/// just store the two bits we care about in the low bits of the 411/// pointer. To handle the packing/unpacking, we make QualType be a 412/// simple wrapper class that acts like a smart pointer. A third bit 413/// indicates whether there are extended qualifiers present, in which 414/// case the pointer points to a special structure. 415class QualType { 416 // Thankfully, these are efficiently composable. 417 llvm::PointerIntPair<llvm::PointerUnion<const Type*,const ExtQuals*>, 418 Qualifiers::FastWidth> Value; 419 420 const ExtQuals *getExtQualsUnsafe() const { 421 return Value.getPointer().get<const ExtQuals*>(); 422 } 423 424 const Type *getTypePtrUnsafe() const { 425 return Value.getPointer().get<const Type*>(); 426 } 427 428 QualType getUnqualifiedTypeSlow() const; 429 430 friend class QualifierCollector; 431public: 432 QualType() {} 433 434 QualType(const Type *Ptr, unsigned Quals) 435 : Value(Ptr, Quals) {} 436 QualType(const ExtQuals *Ptr, unsigned Quals) 437 : Value(Ptr, Quals) {} 438 439 unsigned getLocalFastQualifiers() const { return Value.getInt(); } 440 void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); } 441 442 /// Retrieves a pointer to the underlying (unqualified) type. 443 /// This should really return a const Type, but it's not worth 444 /// changing all the users right now. 445 Type *getTypePtr() const { 446 if (hasLocalNonFastQualifiers()) 447 return const_cast<Type*>(getExtQualsUnsafe()->getBaseType()); 448 return const_cast<Type*>(getTypePtrUnsafe()); 449 } 450 451 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 452 static QualType getFromOpaquePtr(void *Ptr) { 453 QualType T; 454 T.Value.setFromOpaqueValue(Ptr); 455 return T; 456 } 457 458 Type &operator*() const { 459 return *getTypePtr(); 460 } 461 462 Type *operator->() const { 463 return getTypePtr(); 464 } 465 466 bool isCanonical() const; 467 bool isCanonicalAsParam() const; 468 469 /// isNull - Return true if this QualType doesn't point to a type yet. 470 bool isNull() const { 471 return Value.getPointer().isNull(); 472 } 473 474 /// \brief Determine whether this particular QualType instance has the 475 /// "const" qualifier set, without looking through typedefs that may have 476 /// added "const" at a different level. 477 bool isLocalConstQualified() const { 478 return (getLocalFastQualifiers() & Qualifiers::Const); 479 } 480 481 /// \brief Determine whether this type is const-qualified. 482 bool isConstQualified() const; 483 484 /// \brief Determine whether this particular QualType instance has the 485 /// "restrict" qualifier set, without looking through typedefs that may have 486 /// added "restrict" at a different level. 487 bool isLocalRestrictQualified() const { 488 return (getLocalFastQualifiers() & Qualifiers::Restrict); 489 } 490 491 /// \brief Determine whether this type is restrict-qualified. 492 bool isRestrictQualified() const; 493 494 /// \brief Determine whether this particular QualType instance has the 495 /// "volatile" qualifier set, without looking through typedefs that may have 496 /// added "volatile" at a different level. 497 bool isLocalVolatileQualified() const { 498 return (hasLocalNonFastQualifiers() && getExtQualsUnsafe()->hasVolatile()); 499 } 500 501 /// \brief Determine whether this type is volatile-qualified. 502 bool isVolatileQualified() const; 503 504 /// \brief Determine whether this particular QualType instance has any 505 /// qualifiers, without looking through any typedefs that might add 506 /// qualifiers at a different level. 507 bool hasLocalQualifiers() const { 508 return getLocalFastQualifiers() || hasLocalNonFastQualifiers(); 509 } 510 511 /// \brief Determine whether this type has any qualifiers. 512 bool hasQualifiers() const; 513 514 /// \brief Determine whether this particular QualType instance has any 515 /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType 516 /// instance. 517 bool hasLocalNonFastQualifiers() const { 518 return Value.getPointer().is<const ExtQuals*>(); 519 } 520 521 /// \brief Retrieve the set of qualifiers local to this particular QualType 522 /// instance, not including any qualifiers acquired through typedefs or 523 /// other sugar. 524 Qualifiers getLocalQualifiers() const { 525 Qualifiers Quals; 526 if (hasLocalNonFastQualifiers()) 527 Quals = getExtQualsUnsafe()->getQualifiers(); 528 Quals.addFastQualifiers(getLocalFastQualifiers()); 529 return Quals; 530 } 531 532 /// \brief Retrieve the set of qualifiers applied to this type. 533 Qualifiers getQualifiers() const; 534 535 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 536 /// local to this particular QualType instance, not including any qualifiers 537 /// acquired through typedefs or other sugar. 538 unsigned getLocalCVRQualifiers() const { 539 unsigned CVR = getLocalFastQualifiers(); 540 if (isLocalVolatileQualified()) 541 CVR |= Qualifiers::Volatile; 542 return CVR; 543 } 544 545 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 546 /// applied to this type. 547 unsigned getCVRQualifiers() const; 548 549 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 550 /// applied to this type, looking through any number of unqualified array 551 /// types to their element types' qualifiers. 552 unsigned getCVRQualifiersThroughArrayTypes() const; 553 554 bool isConstant(ASTContext& Ctx) const { 555 return QualType::isConstant(*this, Ctx); 556 } 557 558 // Don't promise in the API that anything besides 'const' can be 559 // easily added. 560 561 /// addConst - add the specified type qualifier to this QualType. 562 void addConst() { 563 addFastQualifiers(Qualifiers::Const); 564 } 565 QualType withConst() const { 566 return withFastQualifiers(Qualifiers::Const); 567 } 568 569 void addFastQualifiers(unsigned TQs) { 570 assert(!(TQs & ~Qualifiers::FastMask) 571 && "non-fast qualifier bits set in mask!"); 572 Value.setInt(Value.getInt() | TQs); 573 } 574 575 // FIXME: The remove* functions are semantically broken, because they might 576 // not remove a qualifier stored on a typedef. Most of the with* functions 577 // have the same problem. 578 void removeConst(); 579 void removeVolatile(); 580 void removeRestrict(); 581 void removeCVRQualifiers(unsigned Mask); 582 583 void removeFastQualifiers() { Value.setInt(0); } 584 void removeFastQualifiers(unsigned Mask) { 585 assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers"); 586 Value.setInt(Value.getInt() & ~Mask); 587 } 588 589 // Creates a type with the given qualifiers in addition to any 590 // qualifiers already on this type. 591 QualType withFastQualifiers(unsigned TQs) const { 592 QualType T = *this; 593 T.addFastQualifiers(TQs); 594 return T; 595 } 596 597 // Creates a type with exactly the given fast qualifiers, removing 598 // any existing fast qualifiers. 599 QualType withExactFastQualifiers(unsigned TQs) const { 600 return withoutFastQualifiers().withFastQualifiers(TQs); 601 } 602 603 // Removes fast qualifiers, but leaves any extended qualifiers in place. 604 QualType withoutFastQualifiers() const { 605 QualType T = *this; 606 T.removeFastQualifiers(); 607 return T; 608 } 609 610 /// \brief Return this type with all of the instance-specific qualifiers 611 /// removed, but without removing any qualifiers that may have been applied 612 /// through typedefs. 613 QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); } 614 615 /// \brief Return the unqualified form of the given type, which might be 616 /// desugared to eliminate qualifiers introduced via typedefs. 617 QualType getUnqualifiedType() const { 618 QualType T = getLocalUnqualifiedType(); 619 if (!T.hasQualifiers()) 620 return T; 621 622 return getUnqualifiedTypeSlow(); 623 } 624 625 bool isMoreQualifiedThan(QualType Other) const; 626 bool isAtLeastAsQualifiedAs(QualType Other) const; 627 QualType getNonReferenceType() const; 628 629 /// getDesugaredType - Return the specified type with any "sugar" removed from 630 /// the type. This takes off typedefs, typeof's etc. If the outer level of 631 /// the type is already concrete, it returns it unmodified. This is similar 632 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 633 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 634 /// concrete. 635 /// 636 /// Qualifiers are left in place. 637 QualType getDesugaredType() const { 638 return QualType::getDesugaredType(*this); 639 } 640 641 /// operator==/!= - Indicate whether the specified types and qualifiers are 642 /// identical. 643 friend bool operator==(const QualType &LHS, const QualType &RHS) { 644 return LHS.Value == RHS.Value; 645 } 646 friend bool operator!=(const QualType &LHS, const QualType &RHS) { 647 return LHS.Value != RHS.Value; 648 } 649 std::string getAsString() const; 650 651 std::string getAsString(const PrintingPolicy &Policy) const { 652 std::string S; 653 getAsStringInternal(S, Policy); 654 return S; 655 } 656 void getAsStringInternal(std::string &Str, 657 const PrintingPolicy &Policy) const; 658 659 void dump(const char *s) const; 660 void dump() const; 661 662 void Profile(llvm::FoldingSetNodeID &ID) const { 663 ID.AddPointer(getAsOpaquePtr()); 664 } 665 666 /// getAddressSpace - Return the address space of this type. 667 inline unsigned getAddressSpace() const; 668 669 /// GCAttrTypesAttr - Returns gc attribute of this type. 670 inline Qualifiers::GC getObjCGCAttr() const; 671 672 /// isObjCGCWeak true when Type is objc's weak. 673 bool isObjCGCWeak() const { 674 return getObjCGCAttr() == Qualifiers::Weak; 675 } 676 677 /// isObjCGCStrong true when Type is objc's strong. 678 bool isObjCGCStrong() const { 679 return getObjCGCAttr() == Qualifiers::Strong; 680 } 681 682private: 683 // These methods are implemented in a separate translation unit; 684 // "static"-ize them to avoid creating temporary QualTypes in the 685 // caller. 686 static bool isConstant(QualType T, ASTContext& Ctx); 687 static QualType getDesugaredType(QualType T); 688}; 689 690} // end clang. 691 692namespace llvm { 693/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 694/// to a specific Type class. 695template<> struct simplify_type<const ::clang::QualType> { 696 typedef ::clang::Type* SimpleType; 697 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 698 return Val.getTypePtr(); 699 } 700}; 701template<> struct simplify_type< ::clang::QualType> 702 : public simplify_type<const ::clang::QualType> {}; 703 704// Teach SmallPtrSet that QualType is "basically a pointer". 705template<> 706class PointerLikeTypeTraits<clang::QualType> { 707public: 708 static inline void *getAsVoidPointer(clang::QualType P) { 709 return P.getAsOpaquePtr(); 710 } 711 static inline clang::QualType getFromVoidPointer(void *P) { 712 return clang::QualType::getFromOpaquePtr(P); 713 } 714 // Various qualifiers go in low bits. 715 enum { NumLowBitsAvailable = 0 }; 716}; 717 718} // end namespace llvm 719 720namespace clang { 721 722/// Type - This is the base class of the type hierarchy. A central concept 723/// with types is that each type always has a canonical type. A canonical type 724/// is the type with any typedef names stripped out of it or the types it 725/// references. For example, consider: 726/// 727/// typedef int foo; 728/// typedef foo* bar; 729/// 'int *' 'foo *' 'bar' 730/// 731/// There will be a Type object created for 'int'. Since int is canonical, its 732/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 733/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 734/// there is a PointerType that represents 'int*', which, like 'int', is 735/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 736/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 737/// is also 'int*'. 738/// 739/// Non-canonical types are useful for emitting diagnostics, without losing 740/// information about typedefs being used. Canonical types are useful for type 741/// comparisons (they allow by-pointer equality tests) and useful for reasoning 742/// about whether something has a particular form (e.g. is a function type), 743/// because they implicitly, recursively, strip all typedefs out of a type. 744/// 745/// Types, once created, are immutable. 746/// 747class Type { 748public: 749 enum TypeClass { 750#define TYPE(Class, Base) Class, 751#define LAST_TYPE(Class) TypeLast = Class, 752#define ABSTRACT_TYPE(Class, Base) 753#include "clang/AST/TypeNodes.def" 754 TagFirst = Record, TagLast = Enum 755 }; 756 757private: 758 QualType CanonicalType; 759 760 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 761 unsigned TC : 8; 762 763 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 764 /// Note that this should stay at the end of the ivars for Type so that 765 /// subclasses can pack their bitfields into the same word. 766 bool Dependent : 1; 767 768 Type(const Type&); // DO NOT IMPLEMENT. 769 void operator=(const Type&); // DO NOT IMPLEMENT. 770protected: 771 // silence VC++ warning C4355: 'this' : used in base member initializer list 772 Type *this_() { return this; } 773 Type(TypeClass tc, QualType Canonical, bool dependent) 774 : CanonicalType(Canonical.isNull() ? QualType(this_(), 0) : Canonical), 775 TC(tc), Dependent(dependent) {} 776 virtual ~Type() {} 777 virtual void Destroy(ASTContext& C); 778 friend class ASTContext; 779 780public: 781 TypeClass getTypeClass() const { return static_cast<TypeClass>(TC); } 782 783 bool isCanonicalUnqualified() const { 784 return CanonicalType.getTypePtr() == this; 785 } 786 787 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 788 /// object types, function types, and incomplete types. 789 790 /// \brief Determines whether the type describes an object in memory. 791 /// 792 /// Note that this definition of object type corresponds to the C++ 793 /// definition of object type, which includes incomplete types, as 794 /// opposed to the C definition (which does not include incomplete 795 /// types). 796 bool isObjectType() const; 797 798 /// isIncompleteType - Return true if this is an incomplete type. 799 /// A type that can describe objects, but which lacks information needed to 800 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 801 /// routine will need to determine if the size is actually required. 802 bool isIncompleteType() const; 803 804 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 805 /// type, in other words, not a function type. 806 bool isIncompleteOrObjectType() const { 807 return !isFunctionType(); 808 } 809 810 /// isPODType - Return true if this is a plain-old-data type (C++ 3.9p10). 811 bool isPODType() const; 812 813 /// isLiteralType - Return true if this is a literal type 814 /// (C++0x [basic.types]p10) 815 bool isLiteralType() const; 816 817 /// isVariablyModifiedType (C99 6.7.5.2p2) - Return true for variable array 818 /// types that have a non-constant expression. This does not include "[]". 819 bool isVariablyModifiedType() const; 820 821 /// Helper methods to distinguish type categories. All type predicates 822 /// operate on the canonical type, ignoring typedefs and qualifiers. 823 824 /// isSpecificBuiltinType - Test for a particular builtin type. 825 bool isSpecificBuiltinType(unsigned K) const; 826 827 /// isIntegerType() does *not* include complex integers (a GCC extension). 828 /// isComplexIntegerType() can be used to test for complex integers. 829 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 830 bool isEnumeralType() const; 831 bool isBooleanType() const; 832 bool isCharType() const; 833 bool isWideCharType() const; 834 bool isAnyCharacterType() const; 835 bool isIntegralType() const; 836 837 /// Floating point categories. 838 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 839 /// isComplexType() does *not* include complex integers (a GCC extension). 840 /// isComplexIntegerType() can be used to test for complex integers. 841 bool isComplexType() const; // C99 6.2.5p11 (complex) 842 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 843 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 844 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 845 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 846 bool isVoidType() const; // C99 6.2.5p19 847 bool isDerivedType() const; // C99 6.2.5p20 848 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 849 bool isAggregateType() const; 850 851 // Type Predicates: Check to see if this type is structurally the specified 852 // type, ignoring typedefs and qualifiers. 853 bool isFunctionType() const; 854 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 855 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 856 bool isPointerType() const; 857 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 858 bool isBlockPointerType() const; 859 bool isVoidPointerType() const; 860 bool isReferenceType() const; 861 bool isLValueReferenceType() const; 862 bool isRValueReferenceType() const; 863 bool isFunctionPointerType() const; 864 bool isMemberPointerType() const; 865 bool isMemberFunctionPointerType() const; 866 bool isArrayType() const; 867 bool isConstantArrayType() const; 868 bool isIncompleteArrayType() const; 869 bool isVariableArrayType() const; 870 bool isDependentSizedArrayType() const; 871 bool isRecordType() const; 872 bool isClassType() const; 873 bool isStructureType() const; 874 bool isUnionType() const; 875 bool isComplexIntegerType() const; // GCC _Complex integer type. 876 bool isVectorType() const; // GCC vector type. 877 bool isExtVectorType() const; // Extended vector type. 878 bool isObjCObjectPointerType() const; // Pointer to *any* ObjC object. 879 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 880 // for the common case. 881 bool isObjCInterfaceType() const; // NSString or NSString<foo> 882 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 883 bool isObjCQualifiedIdType() const; // id<foo> 884 bool isObjCQualifiedClassType() const; // Class<foo> 885 bool isObjCIdType() const; // id 886 bool isObjCClassType() const; // Class 887 bool isObjCSelType() const; // Class 888 bool isObjCBuiltinType() const; // 'id' or 'Class' 889 bool isTemplateTypeParmType() const; // C++ template type parameter 890 bool isNullPtrType() const; // C++0x nullptr_t 891 892 /// isDependentType - Whether this type is a dependent type, meaning 893 /// that its definition somehow depends on a template parameter 894 /// (C++ [temp.dep.type]). 895 bool isDependentType() const { return Dependent; } 896 bool isOverloadableType() const; 897 898 /// hasPointerRepresentation - Whether this type is represented 899 /// natively as a pointer; this includes pointers, references, block 900 /// pointers, and Objective-C interface, qualified id, and qualified 901 /// interface types, as well as nullptr_t. 902 bool hasPointerRepresentation() const; 903 904 /// hasObjCPointerRepresentation - Whether this type can represent 905 /// an objective pointer type for the purpose of GC'ability 906 bool hasObjCPointerRepresentation() const; 907 908 // Type Checking Functions: Check to see if this type is structurally the 909 // specified type, ignoring typedefs and qualifiers, and return a pointer to 910 // the best type we can. 911 const RecordType *getAsStructureType() const; 912 /// NOTE: getAs*ArrayType are methods on ASTContext. 913 const RecordType *getAsUnionType() const; 914 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 915 // The following is a convenience method that returns an ObjCObjectPointerType 916 // for object declared using an interface. 917 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 918 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 919 const ObjCInterfaceType *getAsObjCQualifiedInterfaceType() const; 920 const CXXRecordDecl *getCXXRecordDeclForPointerType() const; 921 922 // Member-template getAs<specific type>'. This scheme will eventually 923 // replace the specific getAsXXXX methods above. 924 // 925 // There are some specializations of this member template listed 926 // immediately following this class. 927 template <typename T> const T *getAs() const; 928 929 /// getAsPointerToObjCInterfaceType - If this is a pointer to an ObjC 930 /// interface, return the interface type, otherwise return null. 931 const ObjCInterfaceType *getAsPointerToObjCInterfaceType() const; 932 933 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 934 /// element type of the array, potentially with type qualifiers missing. 935 /// This method should never be used when type qualifiers are meaningful. 936 const Type *getArrayElementTypeNoTypeQual() const; 937 938 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 939 /// pointer, this returns the respective pointee. 940 QualType getPointeeType() const; 941 942 /// getUnqualifiedDesugaredType() - Return the specified type with 943 /// any "sugar" removed from the type, removing any typedefs, 944 /// typeofs, etc., as well as any qualifiers. 945 const Type *getUnqualifiedDesugaredType() const; 946 947 /// More type predicates useful for type checking/promotion 948 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 949 950 /// isSignedIntegerType - Return true if this is an integer type that is 951 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 952 /// an enum decl which has a signed representation, or a vector of signed 953 /// integer element type. 954 bool isSignedIntegerType() const; 955 956 /// isUnsignedIntegerType - Return true if this is an integer type that is 957 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 958 /// decl which has an unsigned representation, or a vector of unsigned integer 959 /// element type. 960 bool isUnsignedIntegerType() const; 961 962 /// isConstantSizeType - Return true if this is not a variable sized type, 963 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 964 /// incomplete types. 965 bool isConstantSizeType() const; 966 967 /// isSpecifierType - Returns true if this type can be represented by some 968 /// set of type specifiers. 969 bool isSpecifierType() const; 970 971 const char *getTypeClassName() const; 972 973 /// \brief Determine the linkage of this type. 974 virtual Linkage getLinkage() const; 975 976 QualType getCanonicalTypeInternal() const { 977 return CanonicalType; 978 } 979 CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h 980 void dump() const; 981 static bool classof(const Type *) { return true; } 982}; 983 984template <> inline const TypedefType *Type::getAs() const { 985 return dyn_cast<TypedefType>(this); 986} 987 988// We can do canonical leaf types faster, because we don't have to 989// worry about preserving child type decoration. 990#define TYPE(Class, Base) 991#define LEAF_TYPE(Class) \ 992template <> inline const Class##Type *Type::getAs() const { \ 993 return dyn_cast<Class##Type>(CanonicalType); \ 994} 995#include "clang/AST/TypeNodes.def" 996 997 998/// BuiltinType - This class is used for builtin types like 'int'. Builtin 999/// types are always canonical and have a literal name field. 1000class BuiltinType : public Type { 1001public: 1002 enum Kind { 1003 Void, 1004 1005 Bool, // This is bool and/or _Bool. 1006 Char_U, // This is 'char' for targets where char is unsigned. 1007 UChar, // This is explicitly qualified unsigned char. 1008 Char16, // This is 'char16_t' for C++. 1009 Char32, // This is 'char32_t' for C++. 1010 UShort, 1011 UInt, 1012 ULong, 1013 ULongLong, 1014 UInt128, // __uint128_t 1015 1016 Char_S, // This is 'char' for targets where char is signed. 1017 SChar, // This is explicitly qualified signed char. 1018 WChar, // This is 'wchar_t' for C++. 1019 Short, 1020 Int, 1021 Long, 1022 LongLong, 1023 Int128, // __int128_t 1024 1025 Float, Double, LongDouble, 1026 1027 NullPtr, // This is the type of C++0x 'nullptr'. 1028 1029 Overload, // This represents the type of an overloaded function declaration. 1030 Dependent, // This represents the type of a type-dependent expression. 1031 1032 UndeducedAuto, // In C++0x, this represents the type of an auto variable 1033 // that has not been deduced yet. 1034 ObjCId, // This represents the ObjC 'id' type. 1035 ObjCClass, // This represents the ObjC 'Class' type. 1036 ObjCSel // This represents the ObjC 'SEL' type. 1037 }; 1038private: 1039 Kind TypeKind; 1040public: 1041 BuiltinType(Kind K) 1042 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent)), 1043 TypeKind(K) {} 1044 1045 Kind getKind() const { return TypeKind; } 1046 const char *getName(const LangOptions &LO) const; 1047 1048 bool isSugared() const { return false; } 1049 QualType desugar() const { return QualType(this, 0); } 1050 1051 bool isInteger() const { 1052 return TypeKind >= Bool && TypeKind <= Int128; 1053 } 1054 1055 bool isSignedInteger() const { 1056 return TypeKind >= Char_S && TypeKind <= Int128; 1057 } 1058 1059 bool isUnsignedInteger() const { 1060 return TypeKind >= Bool && TypeKind <= UInt128; 1061 } 1062 1063 bool isFloatingPoint() const { 1064 return TypeKind >= Float && TypeKind <= LongDouble; 1065 } 1066 1067 virtual Linkage getLinkage() const; 1068 1069 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1070 static bool classof(const BuiltinType *) { return true; } 1071}; 1072 1073/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1074/// types (_Complex float etc) as well as the GCC integer complex extensions. 1075/// 1076class ComplexType : public Type, public llvm::FoldingSetNode { 1077 QualType ElementType; 1078 ComplexType(QualType Element, QualType CanonicalPtr) : 1079 Type(Complex, CanonicalPtr, Element->isDependentType()), 1080 ElementType(Element) { 1081 } 1082 friend class ASTContext; // ASTContext creates these. 1083public: 1084 QualType getElementType() const { return ElementType; } 1085 1086 bool isSugared() const { return false; } 1087 QualType desugar() const { return QualType(this, 0); } 1088 1089 void Profile(llvm::FoldingSetNodeID &ID) { 1090 Profile(ID, getElementType()); 1091 } 1092 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1093 ID.AddPointer(Element.getAsOpaquePtr()); 1094 } 1095 1096 virtual Linkage getLinkage() const; 1097 1098 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1099 static bool classof(const ComplexType *) { return true; } 1100}; 1101 1102/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1103/// 1104class PointerType : public Type, public llvm::FoldingSetNode { 1105 QualType PointeeType; 1106 1107 PointerType(QualType Pointee, QualType CanonicalPtr) : 1108 Type(Pointer, CanonicalPtr, Pointee->isDependentType()), PointeeType(Pointee) { 1109 } 1110 friend class ASTContext; // ASTContext creates these. 1111public: 1112 1113 QualType getPointeeType() const { return PointeeType; } 1114 1115 bool isSugared() const { return false; } 1116 QualType desugar() const { return QualType(this, 0); } 1117 1118 void Profile(llvm::FoldingSetNodeID &ID) { 1119 Profile(ID, getPointeeType()); 1120 } 1121 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1122 ID.AddPointer(Pointee.getAsOpaquePtr()); 1123 } 1124 1125 virtual Linkage getLinkage() const; 1126 1127 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1128 static bool classof(const PointerType *) { return true; } 1129}; 1130 1131/// BlockPointerType - pointer to a block type. 1132/// This type is to represent types syntactically represented as 1133/// "void (^)(int)", etc. Pointee is required to always be a function type. 1134/// 1135class BlockPointerType : public Type, public llvm::FoldingSetNode { 1136 QualType PointeeType; // Block is some kind of pointer type 1137 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1138 Type(BlockPointer, CanonicalCls, Pointee->isDependentType()), 1139 PointeeType(Pointee) { 1140 } 1141 friend class ASTContext; // ASTContext creates these. 1142public: 1143 1144 // Get the pointee type. Pointee is required to always be a function type. 1145 QualType getPointeeType() const { return PointeeType; } 1146 1147 bool isSugared() const { return false; } 1148 QualType desugar() const { return QualType(this, 0); } 1149 1150 void Profile(llvm::FoldingSetNodeID &ID) { 1151 Profile(ID, getPointeeType()); 1152 } 1153 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1154 ID.AddPointer(Pointee.getAsOpaquePtr()); 1155 } 1156 1157 virtual Linkage getLinkage() const; 1158 1159 static bool classof(const Type *T) { 1160 return T->getTypeClass() == BlockPointer; 1161 } 1162 static bool classof(const BlockPointerType *) { return true; } 1163}; 1164 1165/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 1166/// 1167class ReferenceType : public Type, public llvm::FoldingSetNode { 1168 QualType PointeeType; 1169 1170 /// True if the type was originally spelled with an lvalue sigil. 1171 /// This is never true of rvalue references but can also be false 1172 /// on lvalue references because of C++0x [dcl.typedef]p9, 1173 /// as follows: 1174 /// 1175 /// typedef int &ref; // lvalue, spelled lvalue 1176 /// typedef int &&rvref; // rvalue 1177 /// ref &a; // lvalue, inner ref, spelled lvalue 1178 /// ref &&a; // lvalue, inner ref 1179 /// rvref &a; // lvalue, inner ref, spelled lvalue 1180 /// rvref &&a; // rvalue, inner ref 1181 bool SpelledAsLValue; 1182 1183 /// True if the inner type is a reference type. This only happens 1184 /// in non-canonical forms. 1185 bool InnerRef; 1186 1187protected: 1188 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 1189 bool SpelledAsLValue) : 1190 Type(tc, CanonicalRef, Referencee->isDependentType()), 1191 PointeeType(Referencee), SpelledAsLValue(SpelledAsLValue), 1192 InnerRef(Referencee->isReferenceType()) { 1193 } 1194public: 1195 bool isSpelledAsLValue() const { return SpelledAsLValue; } 1196 bool isInnerRef() const { return InnerRef; } 1197 1198 QualType getPointeeTypeAsWritten() const { return PointeeType; } 1199 QualType getPointeeType() const { 1200 // FIXME: this might strip inner qualifiers; okay? 1201 const ReferenceType *T = this; 1202 while (T->InnerRef) 1203 T = T->PointeeType->getAs<ReferenceType>(); 1204 return T->PointeeType; 1205 } 1206 1207 void Profile(llvm::FoldingSetNodeID &ID) { 1208 Profile(ID, PointeeType, SpelledAsLValue); 1209 } 1210 static void Profile(llvm::FoldingSetNodeID &ID, 1211 QualType Referencee, 1212 bool SpelledAsLValue) { 1213 ID.AddPointer(Referencee.getAsOpaquePtr()); 1214 ID.AddBoolean(SpelledAsLValue); 1215 } 1216 1217 virtual Linkage getLinkage() const; 1218 1219 static bool classof(const Type *T) { 1220 return T->getTypeClass() == LValueReference || 1221 T->getTypeClass() == RValueReference; 1222 } 1223 static bool classof(const ReferenceType *) { return true; } 1224}; 1225 1226/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 1227/// 1228class LValueReferenceType : public ReferenceType { 1229 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 1230 bool SpelledAsLValue) : 1231 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 1232 {} 1233 friend class ASTContext; // ASTContext creates these 1234public: 1235 bool isSugared() const { return false; } 1236 QualType desugar() const { return QualType(this, 0); } 1237 1238 static bool classof(const Type *T) { 1239 return T->getTypeClass() == LValueReference; 1240 } 1241 static bool classof(const LValueReferenceType *) { return true; } 1242}; 1243 1244/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 1245/// 1246class RValueReferenceType : public ReferenceType { 1247 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 1248 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 1249 } 1250 friend class ASTContext; // ASTContext creates these 1251public: 1252 bool isSugared() const { return false; } 1253 QualType desugar() const { return QualType(this, 0); } 1254 1255 static bool classof(const Type *T) { 1256 return T->getTypeClass() == RValueReference; 1257 } 1258 static bool classof(const RValueReferenceType *) { return true; } 1259}; 1260 1261/// MemberPointerType - C++ 8.3.3 - Pointers to members 1262/// 1263class MemberPointerType : public Type, public llvm::FoldingSetNode { 1264 QualType PointeeType; 1265 /// The class of which the pointee is a member. Must ultimately be a 1266 /// RecordType, but could be a typedef or a template parameter too. 1267 const Type *Class; 1268 1269 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 1270 Type(MemberPointer, CanonicalPtr, 1271 Cls->isDependentType() || Pointee->isDependentType()), 1272 PointeeType(Pointee), Class(Cls) { 1273 } 1274 friend class ASTContext; // ASTContext creates these. 1275public: 1276 1277 QualType getPointeeType() const { return PointeeType; } 1278 1279 const Type *getClass() const { return Class; } 1280 1281 bool isSugared() const { return false; } 1282 QualType desugar() const { return QualType(this, 0); } 1283 1284 void Profile(llvm::FoldingSetNodeID &ID) { 1285 Profile(ID, getPointeeType(), getClass()); 1286 } 1287 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 1288 const Type *Class) { 1289 ID.AddPointer(Pointee.getAsOpaquePtr()); 1290 ID.AddPointer(Class); 1291 } 1292 1293 virtual Linkage getLinkage() const; 1294 1295 static bool classof(const Type *T) { 1296 return T->getTypeClass() == MemberPointer; 1297 } 1298 static bool classof(const MemberPointerType *) { return true; } 1299}; 1300 1301/// ArrayType - C99 6.7.5.2 - Array Declarators. 1302/// 1303class ArrayType : public Type, public llvm::FoldingSetNode { 1304public: 1305 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 1306 /// an array with a static size (e.g. int X[static 4]), or an array 1307 /// with a star size (e.g. int X[*]). 1308 /// 'static' is only allowed on function parameters. 1309 enum ArraySizeModifier { 1310 Normal, Static, Star 1311 }; 1312private: 1313 /// ElementType - The element type of the array. 1314 QualType ElementType; 1315 1316 // NOTE: VC++ treats enums as signed, avoid using the ArraySizeModifier enum 1317 /// NOTE: These fields are packed into the bitfields space in the Type class. 1318 unsigned SizeModifier : 2; 1319 1320 /// IndexTypeQuals - Capture qualifiers in declarations like: 1321 /// 'int X[static restrict 4]'. For function parameters only. 1322 unsigned IndexTypeQuals : 3; 1323 1324protected: 1325 // C++ [temp.dep.type]p1: 1326 // A type is dependent if it is... 1327 // - an array type constructed from any dependent type or whose 1328 // size is specified by a constant expression that is 1329 // value-dependent, 1330 ArrayType(TypeClass tc, QualType et, QualType can, 1331 ArraySizeModifier sm, unsigned tq) 1332 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray), 1333 ElementType(et), SizeModifier(sm), IndexTypeQuals(tq) {} 1334 1335 friend class ASTContext; // ASTContext creates these. 1336public: 1337 QualType getElementType() const { return ElementType; } 1338 ArraySizeModifier getSizeModifier() const { 1339 return ArraySizeModifier(SizeModifier); 1340 } 1341 Qualifiers getIndexTypeQualifiers() const { 1342 return Qualifiers::fromCVRMask(IndexTypeQuals); 1343 } 1344 unsigned getIndexTypeCVRQualifiers() const { return IndexTypeQuals; } 1345 1346 virtual Linkage getLinkage() const; 1347 1348 static bool classof(const Type *T) { 1349 return T->getTypeClass() == ConstantArray || 1350 T->getTypeClass() == VariableArray || 1351 T->getTypeClass() == IncompleteArray || 1352 T->getTypeClass() == DependentSizedArray; 1353 } 1354 static bool classof(const ArrayType *) { return true; } 1355}; 1356 1357/// ConstantArrayType - This class represents the canonical version of 1358/// C arrays with a specified constant size. For example, the canonical 1359/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 1360/// type is 'int' and the size is 404. 1361class ConstantArrayType : public ArrayType { 1362 llvm::APInt Size; // Allows us to unique the type. 1363 1364 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 1365 ArraySizeModifier sm, unsigned tq) 1366 : ArrayType(ConstantArray, et, can, sm, tq), 1367 Size(size) {} 1368protected: 1369 ConstantArrayType(TypeClass tc, QualType et, QualType can, 1370 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 1371 : ArrayType(tc, et, can, sm, tq), Size(size) {} 1372 friend class ASTContext; // ASTContext creates these. 1373public: 1374 const llvm::APInt &getSize() const { return Size; } 1375 bool isSugared() const { return false; } 1376 QualType desugar() const { return QualType(this, 0); } 1377 1378 void Profile(llvm::FoldingSetNodeID &ID) { 1379 Profile(ID, getElementType(), getSize(), 1380 getSizeModifier(), getIndexTypeCVRQualifiers()); 1381 } 1382 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1383 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 1384 unsigned TypeQuals) { 1385 ID.AddPointer(ET.getAsOpaquePtr()); 1386 ID.AddInteger(ArraySize.getZExtValue()); 1387 ID.AddInteger(SizeMod); 1388 ID.AddInteger(TypeQuals); 1389 } 1390 static bool classof(const Type *T) { 1391 return T->getTypeClass() == ConstantArray; 1392 } 1393 static bool classof(const ConstantArrayType *) { return true; } 1394}; 1395 1396/// IncompleteArrayType - This class represents C arrays with an unspecified 1397/// size. For example 'int A[]' has an IncompleteArrayType where the element 1398/// type is 'int' and the size is unspecified. 1399class IncompleteArrayType : public ArrayType { 1400 1401 IncompleteArrayType(QualType et, QualType can, 1402 ArraySizeModifier sm, unsigned tq) 1403 : ArrayType(IncompleteArray, et, can, sm, tq) {} 1404 friend class ASTContext; // ASTContext creates these. 1405public: 1406 bool isSugared() const { return false; } 1407 QualType desugar() const { return QualType(this, 0); } 1408 1409 static bool classof(const Type *T) { 1410 return T->getTypeClass() == IncompleteArray; 1411 } 1412 static bool classof(const IncompleteArrayType *) { return true; } 1413 1414 friend class StmtIteratorBase; 1415 1416 void Profile(llvm::FoldingSetNodeID &ID) { 1417 Profile(ID, getElementType(), getSizeModifier(), 1418 getIndexTypeCVRQualifiers()); 1419 } 1420 1421 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1422 ArraySizeModifier SizeMod, unsigned TypeQuals) { 1423 ID.AddPointer(ET.getAsOpaquePtr()); 1424 ID.AddInteger(SizeMod); 1425 ID.AddInteger(TypeQuals); 1426 } 1427}; 1428 1429/// VariableArrayType - This class represents C arrays with a specified size 1430/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 1431/// Since the size expression is an arbitrary expression, we store it as such. 1432/// 1433/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 1434/// should not be: two lexically equivalent variable array types could mean 1435/// different things, for example, these variables do not have the same type 1436/// dynamically: 1437/// 1438/// void foo(int x) { 1439/// int Y[x]; 1440/// ++x; 1441/// int Z[x]; 1442/// } 1443/// 1444class VariableArrayType : public ArrayType { 1445 /// SizeExpr - An assignment expression. VLA's are only permitted within 1446 /// a function block. 1447 Stmt *SizeExpr; 1448 /// Brackets - The left and right array brackets. 1449 SourceRange Brackets; 1450 1451 VariableArrayType(QualType et, QualType can, Expr *e, 1452 ArraySizeModifier sm, unsigned tq, 1453 SourceRange brackets) 1454 : ArrayType(VariableArray, et, can, sm, tq), 1455 SizeExpr((Stmt*) e), Brackets(brackets) {} 1456 friend class ASTContext; // ASTContext creates these. 1457 virtual void Destroy(ASTContext& C); 1458 1459public: 1460 Expr *getSizeExpr() const { 1461 // We use C-style casts instead of cast<> here because we do not wish 1462 // to have a dependency of Type.h on Stmt.h/Expr.h. 1463 return (Expr*) SizeExpr; 1464 } 1465 SourceRange getBracketsRange() const { return Brackets; } 1466 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1467 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1468 1469 bool isSugared() const { return false; } 1470 QualType desugar() const { return QualType(this, 0); } 1471 1472 static bool classof(const Type *T) { 1473 return T->getTypeClass() == VariableArray; 1474 } 1475 static bool classof(const VariableArrayType *) { return true; } 1476 1477 friend class StmtIteratorBase; 1478 1479 void Profile(llvm::FoldingSetNodeID &ID) { 1480 assert(0 && "Cannnot unique VariableArrayTypes."); 1481 } 1482}; 1483 1484/// DependentSizedArrayType - This type represents an array type in 1485/// C++ whose size is a value-dependent expression. For example: 1486/// 1487/// \code 1488/// template<typename T, int Size> 1489/// class array { 1490/// T data[Size]; 1491/// }; 1492/// \endcode 1493/// 1494/// For these types, we won't actually know what the array bound is 1495/// until template instantiation occurs, at which point this will 1496/// become either a ConstantArrayType or a VariableArrayType. 1497class DependentSizedArrayType : public ArrayType { 1498 ASTContext &Context; 1499 1500 /// \brief An assignment expression that will instantiate to the 1501 /// size of the array. 1502 /// 1503 /// The expression itself might be NULL, in which case the array 1504 /// type will have its size deduced from an initializer. 1505 Stmt *SizeExpr; 1506 1507 /// Brackets - The left and right array brackets. 1508 SourceRange Brackets; 1509 1510 DependentSizedArrayType(ASTContext &Context, QualType et, QualType can, 1511 Expr *e, ArraySizeModifier sm, unsigned tq, 1512 SourceRange brackets) 1513 : ArrayType(DependentSizedArray, et, can, sm, tq), 1514 Context(Context), SizeExpr((Stmt*) e), Brackets(brackets) {} 1515 friend class ASTContext; // ASTContext creates these. 1516 virtual void Destroy(ASTContext& C); 1517 1518public: 1519 Expr *getSizeExpr() const { 1520 // We use C-style casts instead of cast<> here because we do not wish 1521 // to have a dependency of Type.h on Stmt.h/Expr.h. 1522 return (Expr*) SizeExpr; 1523 } 1524 SourceRange getBracketsRange() const { return Brackets; } 1525 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1526 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1527 1528 bool isSugared() const { return false; } 1529 QualType desugar() const { return QualType(this, 0); } 1530 1531 static bool classof(const Type *T) { 1532 return T->getTypeClass() == DependentSizedArray; 1533 } 1534 static bool classof(const DependentSizedArrayType *) { return true; } 1535 1536 friend class StmtIteratorBase; 1537 1538 1539 void Profile(llvm::FoldingSetNodeID &ID) { 1540 Profile(ID, Context, getElementType(), 1541 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 1542 } 1543 1544 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1545 QualType ET, ArraySizeModifier SizeMod, 1546 unsigned TypeQuals, Expr *E); 1547}; 1548 1549/// DependentSizedExtVectorType - This type represent an extended vector type 1550/// where either the type or size is dependent. For example: 1551/// @code 1552/// template<typename T, int Size> 1553/// class vector { 1554/// typedef T __attribute__((ext_vector_type(Size))) type; 1555/// } 1556/// @endcode 1557class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 1558 ASTContext &Context; 1559 Expr *SizeExpr; 1560 /// ElementType - The element type of the array. 1561 QualType ElementType; 1562 SourceLocation loc; 1563 1564 DependentSizedExtVectorType(ASTContext &Context, QualType ElementType, 1565 QualType can, Expr *SizeExpr, SourceLocation loc) 1566 : Type (DependentSizedExtVector, can, true), 1567 Context(Context), SizeExpr(SizeExpr), ElementType(ElementType), 1568 loc(loc) {} 1569 friend class ASTContext; 1570 virtual void Destroy(ASTContext& C); 1571 1572public: 1573 Expr *getSizeExpr() const { return SizeExpr; } 1574 QualType getElementType() const { return ElementType; } 1575 SourceLocation getAttributeLoc() const { return loc; } 1576 1577 bool isSugared() const { return false; } 1578 QualType desugar() const { return QualType(this, 0); } 1579 1580 static bool classof(const Type *T) { 1581 return T->getTypeClass() == DependentSizedExtVector; 1582 } 1583 static bool classof(const DependentSizedExtVectorType *) { return true; } 1584 1585 void Profile(llvm::FoldingSetNodeID &ID) { 1586 Profile(ID, Context, getElementType(), getSizeExpr()); 1587 } 1588 1589 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1590 QualType ElementType, Expr *SizeExpr); 1591}; 1592 1593 1594/// VectorType - GCC generic vector type. This type is created using 1595/// __attribute__((vector_size(n)), where "n" specifies the vector size in 1596/// bytes; or from an Altivec __vector or vector declaration. 1597/// Since the constructor takes the number of vector elements, the 1598/// client is responsible for converting the size into the number of elements. 1599class VectorType : public Type, public llvm::FoldingSetNode { 1600protected: 1601 /// ElementType - The element type of the vector. 1602 QualType ElementType; 1603 1604 /// NumElements - The number of elements in the vector. 1605 unsigned NumElements; 1606 1607 /// AltiVec - True if this is for an Altivec vector. 1608 bool AltiVec; 1609 1610 /// Pixel - True if this is for an Altivec vector pixel. 1611 bool Pixel; 1612 1613 VectorType(QualType vecType, unsigned nElements, QualType canonType, 1614 bool isAltiVec, bool isPixel) : 1615 Type(Vector, canonType, vecType->isDependentType()), 1616 ElementType(vecType), NumElements(nElements), 1617 AltiVec(isAltiVec), Pixel(isPixel) {} 1618 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 1619 QualType canonType, bool isAltiVec, bool isPixel) 1620 : Type(tc, canonType, vecType->isDependentType()), ElementType(vecType), 1621 NumElements(nElements), AltiVec(isAltiVec), Pixel(isPixel) {} 1622 friend class ASTContext; // ASTContext creates these. 1623public: 1624 1625 QualType getElementType() const { return ElementType; } 1626 unsigned getNumElements() const { return NumElements; } 1627 1628 bool isSugared() const { return false; } 1629 QualType desugar() const { return QualType(this, 0); } 1630 1631 bool isAltiVec() const { return AltiVec; } 1632 1633 bool isPixel() const { return Pixel; } 1634 1635 void Profile(llvm::FoldingSetNodeID &ID) { 1636 Profile(ID, getElementType(), getNumElements(), getTypeClass(), 1637 AltiVec, Pixel); 1638 } 1639 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 1640 unsigned NumElements, TypeClass TypeClass, 1641 bool isAltiVec, bool isPixel) { 1642 ID.AddPointer(ElementType.getAsOpaquePtr()); 1643 ID.AddInteger(NumElements); 1644 ID.AddInteger(TypeClass); 1645 ID.AddBoolean(isAltiVec); 1646 ID.AddBoolean(isPixel); 1647 } 1648 1649 virtual Linkage getLinkage() const; 1650 1651 static bool classof(const Type *T) { 1652 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 1653 } 1654 static bool classof(const VectorType *) { return true; } 1655}; 1656 1657/// ExtVectorType - Extended vector type. This type is created using 1658/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 1659/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 1660/// class enables syntactic extensions, like Vector Components for accessing 1661/// points, colors, and textures (modeled after OpenGL Shading Language). 1662class ExtVectorType : public VectorType { 1663 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 1664 VectorType(ExtVector, vecType, nElements, canonType, false, false) {} 1665 friend class ASTContext; // ASTContext creates these. 1666public: 1667 static int getPointAccessorIdx(char c) { 1668 switch (c) { 1669 default: return -1; 1670 case 'x': return 0; 1671 case 'y': return 1; 1672 case 'z': return 2; 1673 case 'w': return 3; 1674 } 1675 } 1676 static int getNumericAccessorIdx(char c) { 1677 switch (c) { 1678 default: return -1; 1679 case '0': return 0; 1680 case '1': return 1; 1681 case '2': return 2; 1682 case '3': return 3; 1683 case '4': return 4; 1684 case '5': return 5; 1685 case '6': return 6; 1686 case '7': return 7; 1687 case '8': return 8; 1688 case '9': return 9; 1689 case 'A': 1690 case 'a': return 10; 1691 case 'B': 1692 case 'b': return 11; 1693 case 'C': 1694 case 'c': return 12; 1695 case 'D': 1696 case 'd': return 13; 1697 case 'E': 1698 case 'e': return 14; 1699 case 'F': 1700 case 'f': return 15; 1701 } 1702 } 1703 1704 static int getAccessorIdx(char c) { 1705 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 1706 return getNumericAccessorIdx(c); 1707 } 1708 1709 bool isAccessorWithinNumElements(char c) const { 1710 if (int idx = getAccessorIdx(c)+1) 1711 return unsigned(idx-1) < NumElements; 1712 return false; 1713 } 1714 bool isSugared() const { return false; } 1715 QualType desugar() const { return QualType(this, 0); } 1716 1717 static bool classof(const Type *T) { 1718 return T->getTypeClass() == ExtVector; 1719 } 1720 static bool classof(const ExtVectorType *) { return true; } 1721}; 1722 1723/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 1724/// class of FunctionNoProtoType and FunctionProtoType. 1725/// 1726class FunctionType : public Type { 1727 /// SubClassData - This field is owned by the subclass, put here to pack 1728 /// tightly with the ivars in Type. 1729 bool SubClassData : 1; 1730 1731 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1732 /// other bitfields. 1733 /// The qualifiers are part of FunctionProtoType because... 1734 /// 1735 /// C++ 8.3.5p4: The return type, the parameter type list and the 1736 /// cv-qualifier-seq, [...], are part of the function type. 1737 /// 1738 unsigned TypeQuals : 3; 1739 1740 /// NoReturn - Indicates if the function type is attribute noreturn. 1741 unsigned NoReturn : 1; 1742 1743 /// RegParm - How many arguments to pass inreg. 1744 unsigned RegParm : 3; 1745 1746 /// CallConv - The calling convention used by the function. 1747 unsigned CallConv : 2; 1748 1749 // The type returned by the function. 1750 QualType ResultType; 1751 1752 public: 1753 // This class is used for passing arround the information needed to 1754 // construct a call. It is not actually used for storage, just for 1755 // factoring together common arguments. 1756 // If you add a field (say Foo), other than the obvious places (both, constructors, 1757 // compile failures), what you need to update is 1758 // * Operetor== 1759 // * getFoo 1760 // * withFoo 1761 // * functionType. Add Foo, getFoo. 1762 // * ASTContext::getFooType 1763 // * ASTContext::mergeFunctionTypes 1764 // * FunctionNoProtoType::Profile 1765 // * FunctionProtoType::Profile 1766 // * TypePrinter::PrintFunctionProto 1767 // * PCH read and write 1768 // * Codegen 1769 1770 class ExtInfo { 1771 public: 1772 // Constructor with no defaults. Use this when you know that you 1773 // have all the elements (when reading a PCH file for example). 1774 ExtInfo(bool noReturn, unsigned regParm, CallingConv cc) : 1775 NoReturn(noReturn), RegParm(regParm), CC(cc) {} 1776 1777 // Constructor with all defaults. Use when for example creating a 1778 // function know to use defaults. 1779 ExtInfo() : NoReturn(false), RegParm(0), CC(CC_Default) {} 1780 1781 bool getNoReturn() const { return NoReturn; } 1782 unsigned getRegParm() const { return RegParm; } 1783 CallingConv getCC() const { return CC; } 1784 1785 bool operator==(const ExtInfo &Other) const { 1786 return getNoReturn() == Other.getNoReturn() && 1787 getRegParm() == Other.getRegParm() && 1788 getCC() == Other.getCC(); 1789 } 1790 bool operator!=(const ExtInfo &Other) const { 1791 return !(*this == Other); 1792 } 1793 1794 // Note that we don't have setters. That is by design, use 1795 // the following with methods instead of mutating these objects. 1796 1797 ExtInfo withNoReturn(bool noReturn) const { 1798 return ExtInfo(noReturn, getRegParm(), getCC()); 1799 } 1800 1801 ExtInfo withRegParm(unsigned RegParm) const { 1802 return ExtInfo(getNoReturn(), RegParm, getCC()); 1803 } 1804 1805 ExtInfo withCallingConv(CallingConv cc) const { 1806 return ExtInfo(getNoReturn(), getRegParm(), cc); 1807 } 1808 1809 private: 1810 // True if we have __attribute__((noreturn)) 1811 bool NoReturn; 1812 // The value passed to __attribute__((regparm(x))) 1813 unsigned RegParm; 1814 // The calling convention as specified via 1815 // __attribute__((cdecl|stdcall||fastcall)) 1816 CallingConv CC; 1817 }; 1818 1819protected: 1820 FunctionType(TypeClass tc, QualType res, bool SubclassInfo, 1821 unsigned typeQuals, QualType Canonical, bool Dependent, 1822 const ExtInfo &Info) 1823 : Type(tc, Canonical, Dependent), 1824 SubClassData(SubclassInfo), TypeQuals(typeQuals), 1825 NoReturn(Info.getNoReturn()), 1826 RegParm(Info.getRegParm()), CallConv(Info.getCC()), ResultType(res) {} 1827 bool getSubClassData() const { return SubClassData; } 1828 unsigned getTypeQuals() const { return TypeQuals; } 1829public: 1830 1831 QualType getResultType() const { return ResultType; } 1832 unsigned getRegParmType() const { return RegParm; } 1833 bool getNoReturnAttr() const { return NoReturn; } 1834 CallingConv getCallConv() const { return (CallingConv)CallConv; } 1835 ExtInfo getExtInfo() const { 1836 return ExtInfo(NoReturn, RegParm, (CallingConv)CallConv); 1837 } 1838 1839 static llvm::StringRef getNameForCallConv(CallingConv CC); 1840 1841 static bool classof(const Type *T) { 1842 return T->getTypeClass() == FunctionNoProto || 1843 T->getTypeClass() == FunctionProto; 1844 } 1845 static bool classof(const FunctionType *) { return true; } 1846}; 1847 1848/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 1849/// no information available about its arguments. 1850class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 1851 FunctionNoProtoType(QualType Result, QualType Canonical, 1852 const ExtInfo &Info) 1853 : FunctionType(FunctionNoProto, Result, false, 0, Canonical, 1854 /*Dependent=*/false, Info) {} 1855 friend class ASTContext; // ASTContext creates these. 1856public: 1857 // No additional state past what FunctionType provides. 1858 1859 bool isSugared() const { return false; } 1860 QualType desugar() const { return QualType(this, 0); } 1861 1862 void Profile(llvm::FoldingSetNodeID &ID) { 1863 Profile(ID, getResultType(), getExtInfo()); 1864 } 1865 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 1866 const ExtInfo &Info) { 1867 ID.AddInteger(Info.getCC()); 1868 ID.AddInteger(Info.getRegParm()); 1869 ID.AddInteger(Info.getNoReturn()); 1870 ID.AddPointer(ResultType.getAsOpaquePtr()); 1871 } 1872 1873 virtual Linkage getLinkage() const; 1874 1875 static bool classof(const Type *T) { 1876 return T->getTypeClass() == FunctionNoProto; 1877 } 1878 static bool classof(const FunctionNoProtoType *) { return true; } 1879}; 1880 1881/// FunctionProtoType - Represents a prototype with argument type info, e.g. 1882/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 1883/// arguments, not as having a single void argument. Such a type can have an 1884/// exception specification, but this specification is not part of the canonical 1885/// type. 1886class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 1887 /// hasAnyDependentType - Determine whether there are any dependent 1888 /// types within the arguments passed in. 1889 static bool hasAnyDependentType(const QualType *ArgArray, unsigned numArgs) { 1890 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 1891 if (ArgArray[Idx]->isDependentType()) 1892 return true; 1893 1894 return false; 1895 } 1896 1897 FunctionProtoType(QualType Result, const QualType *ArgArray, unsigned numArgs, 1898 bool isVariadic, unsigned typeQuals, bool hasExs, 1899 bool hasAnyExs, const QualType *ExArray, 1900 unsigned numExs, QualType Canonical, 1901 const ExtInfo &Info) 1902 : FunctionType(FunctionProto, Result, isVariadic, typeQuals, Canonical, 1903 (Result->isDependentType() || 1904 hasAnyDependentType(ArgArray, numArgs)), 1905 Info), 1906 NumArgs(numArgs), NumExceptions(numExs), HasExceptionSpec(hasExs), 1907 AnyExceptionSpec(hasAnyExs) { 1908 // Fill in the trailing argument array. 1909 QualType *ArgInfo = reinterpret_cast<QualType*>(this+1); 1910 for (unsigned i = 0; i != numArgs; ++i) 1911 ArgInfo[i] = ArgArray[i]; 1912 // Fill in the exception array. 1913 QualType *Ex = ArgInfo + numArgs; 1914 for (unsigned i = 0; i != numExs; ++i) 1915 Ex[i] = ExArray[i]; 1916 } 1917 1918 /// NumArgs - The number of arguments this function has, not counting '...'. 1919 unsigned NumArgs : 20; 1920 1921 /// NumExceptions - The number of types in the exception spec, if any. 1922 unsigned NumExceptions : 10; 1923 1924 /// HasExceptionSpec - Whether this function has an exception spec at all. 1925 bool HasExceptionSpec : 1; 1926 1927 /// AnyExceptionSpec - Whether this function has a throw(...) spec. 1928 bool AnyExceptionSpec : 1; 1929 1930 /// ArgInfo - There is an variable size array after the class in memory that 1931 /// holds the argument types. 1932 1933 /// Exceptions - There is another variable size array after ArgInfo that 1934 /// holds the exception types. 1935 1936 friend class ASTContext; // ASTContext creates these. 1937 1938public: 1939 unsigned getNumArgs() const { return NumArgs; } 1940 QualType getArgType(unsigned i) const { 1941 assert(i < NumArgs && "Invalid argument number!"); 1942 return arg_type_begin()[i]; 1943 } 1944 1945 bool hasExceptionSpec() const { return HasExceptionSpec; } 1946 bool hasAnyExceptionSpec() const { return AnyExceptionSpec; } 1947 unsigned getNumExceptions() const { return NumExceptions; } 1948 QualType getExceptionType(unsigned i) const { 1949 assert(i < NumExceptions && "Invalid exception number!"); 1950 return exception_begin()[i]; 1951 } 1952 bool hasEmptyExceptionSpec() const { 1953 return hasExceptionSpec() && !hasAnyExceptionSpec() && 1954 getNumExceptions() == 0; 1955 } 1956 1957 bool isVariadic() const { return getSubClassData(); } 1958 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 1959 1960 typedef const QualType *arg_type_iterator; 1961 arg_type_iterator arg_type_begin() const { 1962 return reinterpret_cast<const QualType *>(this+1); 1963 } 1964 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 1965 1966 typedef const QualType *exception_iterator; 1967 exception_iterator exception_begin() const { 1968 // exceptions begin where arguments end 1969 return arg_type_end(); 1970 } 1971 exception_iterator exception_end() const { 1972 return exception_begin() + NumExceptions; 1973 } 1974 1975 bool isSugared() const { return false; } 1976 QualType desugar() const { return QualType(this, 0); } 1977 1978 virtual Linkage getLinkage() const; 1979 1980 static bool classof(const Type *T) { 1981 return T->getTypeClass() == FunctionProto; 1982 } 1983 static bool classof(const FunctionProtoType *) { return true; } 1984 1985 void Profile(llvm::FoldingSetNodeID &ID); 1986 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 1987 arg_type_iterator ArgTys, unsigned NumArgs, 1988 bool isVariadic, unsigned TypeQuals, 1989 bool hasExceptionSpec, bool anyExceptionSpec, 1990 unsigned NumExceptions, exception_iterator Exs, 1991 const ExtInfo &ExtInfo); 1992}; 1993 1994 1995/// \brief Represents the dependent type named by a dependently-scoped 1996/// typename using declaration, e.g. 1997/// using typename Base<T>::foo; 1998/// Template instantiation turns these into the underlying type. 1999class UnresolvedUsingType : public Type { 2000 UnresolvedUsingTypenameDecl *Decl; 2001 2002 UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) 2003 : Type(UnresolvedUsing, QualType(), true), 2004 Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} 2005 friend class ASTContext; // ASTContext creates these. 2006public: 2007 2008 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 2009 2010 bool isSugared() const { return false; } 2011 QualType desugar() const { return QualType(this, 0); } 2012 2013 static bool classof(const Type *T) { 2014 return T->getTypeClass() == UnresolvedUsing; 2015 } 2016 static bool classof(const UnresolvedUsingType *) { return true; } 2017 2018 void Profile(llvm::FoldingSetNodeID &ID) { 2019 return Profile(ID, Decl); 2020 } 2021 static void Profile(llvm::FoldingSetNodeID &ID, 2022 UnresolvedUsingTypenameDecl *D) { 2023 ID.AddPointer(D); 2024 } 2025}; 2026 2027 2028class TypedefType : public Type { 2029 TypedefDecl *Decl; 2030protected: 2031 TypedefType(TypeClass tc, const TypedefDecl *D, QualType can) 2032 : Type(tc, can, can->isDependentType()), 2033 Decl(const_cast<TypedefDecl*>(D)) { 2034 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2035 } 2036 friend class ASTContext; // ASTContext creates these. 2037public: 2038 2039 TypedefDecl *getDecl() const { return Decl; } 2040 2041 /// LookThroughTypedefs - Return the ultimate type this typedef corresponds to 2042 /// potentially looking through *all* consecutive typedefs. This returns the 2043 /// sum of the type qualifiers, so if you have: 2044 /// typedef const int A; 2045 /// typedef volatile A B; 2046 /// looking through the typedefs for B will give you "const volatile A". 2047 QualType LookThroughTypedefs() const; 2048 2049 bool isSugared() const { return true; } 2050 QualType desugar() const; 2051 2052 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 2053 static bool classof(const TypedefType *) { return true; } 2054}; 2055 2056/// TypeOfExprType (GCC extension). 2057class TypeOfExprType : public Type { 2058 Expr *TOExpr; 2059 2060protected: 2061 TypeOfExprType(Expr *E, QualType can = QualType()); 2062 friend class ASTContext; // ASTContext creates these. 2063public: 2064 Expr *getUnderlyingExpr() const { return TOExpr; } 2065 2066 /// \brief Remove a single level of sugar. 2067 QualType desugar() const; 2068 2069 /// \brief Returns whether this type directly provides sugar. 2070 bool isSugared() const { return true; } 2071 2072 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 2073 static bool classof(const TypeOfExprType *) { return true; } 2074}; 2075 2076/// \brief Internal representation of canonical, dependent 2077/// typeof(expr) types. 2078/// 2079/// This class is used internally by the ASTContext to manage 2080/// canonical, dependent types, only. Clients will only see instances 2081/// of this class via TypeOfExprType nodes. 2082class DependentTypeOfExprType 2083 : public TypeOfExprType, public llvm::FoldingSetNode { 2084 ASTContext &Context; 2085 2086public: 2087 DependentTypeOfExprType(ASTContext &Context, Expr *E) 2088 : TypeOfExprType(E), Context(Context) { } 2089 2090 bool isSugared() const { return false; } 2091 QualType desugar() const { return QualType(this, 0); } 2092 2093 void Profile(llvm::FoldingSetNodeID &ID) { 2094 Profile(ID, Context, getUnderlyingExpr()); 2095 } 2096 2097 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2098 Expr *E); 2099}; 2100 2101/// TypeOfType (GCC extension). 2102class TypeOfType : public Type { 2103 QualType TOType; 2104 TypeOfType(QualType T, QualType can) 2105 : Type(TypeOf, can, T->isDependentType()), TOType(T) { 2106 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2107 } 2108 friend class ASTContext; // ASTContext creates these. 2109public: 2110 QualType getUnderlyingType() const { return TOType; } 2111 2112 /// \brief Remove a single level of sugar. 2113 QualType desugar() const { return getUnderlyingType(); } 2114 2115 /// \brief Returns whether this type directly provides sugar. 2116 bool isSugared() const { return true; } 2117 2118 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 2119 static bool classof(const TypeOfType *) { return true; } 2120}; 2121 2122/// DecltypeType (C++0x) 2123class DecltypeType : public Type { 2124 Expr *E; 2125 2126 // FIXME: We could get rid of UnderlyingType if we wanted to: We would have to 2127 // Move getDesugaredType to ASTContext so that it can call getDecltypeForExpr 2128 // from it. 2129 QualType UnderlyingType; 2130 2131protected: 2132 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 2133 friend class ASTContext; // ASTContext creates these. 2134public: 2135 Expr *getUnderlyingExpr() const { return E; } 2136 QualType getUnderlyingType() const { return UnderlyingType; } 2137 2138 /// \brief Remove a single level of sugar. 2139 QualType desugar() const { return getUnderlyingType(); } 2140 2141 /// \brief Returns whether this type directly provides sugar. 2142 bool isSugared() const { return !isDependentType(); } 2143 2144 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 2145 static bool classof(const DecltypeType *) { return true; } 2146}; 2147 2148/// \brief Internal representation of canonical, dependent 2149/// decltype(expr) types. 2150/// 2151/// This class is used internally by the ASTContext to manage 2152/// canonical, dependent types, only. Clients will only see instances 2153/// of this class via DecltypeType nodes. 2154class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 2155 ASTContext &Context; 2156 2157public: 2158 DependentDecltypeType(ASTContext &Context, Expr *E); 2159 2160 bool isSugared() const { return false; } 2161 QualType desugar() const { return QualType(this, 0); } 2162 2163 void Profile(llvm::FoldingSetNodeID &ID) { 2164 Profile(ID, Context, getUnderlyingExpr()); 2165 } 2166 2167 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2168 Expr *E); 2169}; 2170 2171class TagType : public Type { 2172 /// Stores the TagDecl associated with this type. The decl will 2173 /// point to the TagDecl that actually defines the entity (or is a 2174 /// definition in progress), if there is such a definition. The 2175 /// single-bit value will be non-zero when this tag is in the 2176 /// process of being defined. 2177 mutable llvm::PointerIntPair<TagDecl *, 1> decl; 2178 friend class ASTContext; 2179 friend class TagDecl; 2180 2181protected: 2182 TagType(TypeClass TC, const TagDecl *D, QualType can); 2183 2184public: 2185 TagDecl *getDecl() const { return decl.getPointer(); } 2186 2187 /// @brief Determines whether this type is in the process of being 2188 /// defined. 2189 bool isBeingDefined() const { return decl.getInt(); } 2190 void setBeingDefined(bool Def) const { decl.setInt(Def? 1 : 0); } 2191 2192 virtual Linkage getLinkage() const; 2193 2194 static bool classof(const Type *T) { 2195 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 2196 } 2197 static bool classof(const TagType *) { return true; } 2198 static bool classof(const RecordType *) { return true; } 2199 static bool classof(const EnumType *) { return true; } 2200}; 2201 2202/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 2203/// to detect TagType objects of structs/unions/classes. 2204class RecordType : public TagType { 2205protected: 2206 explicit RecordType(const RecordDecl *D) 2207 : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2208 explicit RecordType(TypeClass TC, RecordDecl *D) 2209 : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2210 friend class ASTContext; // ASTContext creates these. 2211public: 2212 2213 RecordDecl *getDecl() const { 2214 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 2215 } 2216 2217 // FIXME: This predicate is a helper to QualType/Type. It needs to 2218 // recursively check all fields for const-ness. If any field is declared 2219 // const, it needs to return false. 2220 bool hasConstFields() const { return false; } 2221 2222 // FIXME: RecordType needs to check when it is created that all fields are in 2223 // the same address space, and return that. 2224 unsigned getAddressSpace() const { return 0; } 2225 2226 bool isSugared() const { return false; } 2227 QualType desugar() const { return QualType(this, 0); } 2228 2229 static bool classof(const TagType *T); 2230 static bool classof(const Type *T) { 2231 return isa<TagType>(T) && classof(cast<TagType>(T)); 2232 } 2233 static bool classof(const RecordType *) { return true; } 2234}; 2235 2236/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 2237/// to detect TagType objects of enums. 2238class EnumType : public TagType { 2239 explicit EnumType(const EnumDecl *D) 2240 : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2241 friend class ASTContext; // ASTContext creates these. 2242public: 2243 2244 EnumDecl *getDecl() const { 2245 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 2246 } 2247 2248 bool isSugared() const { return false; } 2249 QualType desugar() const { return QualType(this, 0); } 2250 2251 static bool classof(const TagType *T); 2252 static bool classof(const Type *T) { 2253 return isa<TagType>(T) && classof(cast<TagType>(T)); 2254 } 2255 static bool classof(const EnumType *) { return true; } 2256}; 2257 2258/// ElaboratedType - A non-canonical type used to represents uses of 2259/// elaborated type specifiers in C++. For example: 2260/// 2261/// void foo(union MyUnion); 2262/// ^^^^^^^^^^^^^ 2263/// 2264/// At the moment, for efficiency we do not create elaborated types in 2265/// C, since outside of typedefs all references to structs would 2266/// necessarily be elaborated. 2267class ElaboratedType : public Type, public llvm::FoldingSetNode { 2268public: 2269 enum TagKind { 2270 TK_struct, 2271 TK_union, 2272 TK_class, 2273 TK_enum 2274 }; 2275 2276private: 2277 /// The tag that was used in this elaborated type specifier. 2278 TagKind Tag; 2279 2280 /// The underlying type. 2281 QualType UnderlyingType; 2282 2283 explicit ElaboratedType(QualType Ty, TagKind Tag, QualType Canon) 2284 : Type(Elaborated, Canon, Canon->isDependentType()), 2285 Tag(Tag), UnderlyingType(Ty) { } 2286 friend class ASTContext; // ASTContext creates these. 2287 2288public: 2289 TagKind getTagKind() const { return Tag; } 2290 QualType getUnderlyingType() const { return UnderlyingType; } 2291 2292 /// \brief Remove a single level of sugar. 2293 QualType desugar() const { return getUnderlyingType(); } 2294 2295 /// \brief Returns whether this type directly provides sugar. 2296 bool isSugared() const { return true; } 2297 2298 static const char *getNameForTagKind(TagKind Kind) { 2299 switch (Kind) { 2300 default: assert(0 && "Unknown TagKind!"); 2301 case TK_struct: return "struct"; 2302 case TK_union: return "union"; 2303 case TK_class: return "class"; 2304 case TK_enum: return "enum"; 2305 } 2306 } 2307 2308 void Profile(llvm::FoldingSetNodeID &ID) { 2309 Profile(ID, getUnderlyingType(), getTagKind()); 2310 } 2311 static void Profile(llvm::FoldingSetNodeID &ID, QualType T, TagKind Tag) { 2312 ID.AddPointer(T.getAsOpaquePtr()); 2313 ID.AddInteger(Tag); 2314 } 2315 2316 static bool classof(const ElaboratedType*) { return true; } 2317 static bool classof(const Type *T) { return T->getTypeClass() == Elaborated; } 2318}; 2319 2320class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2321 unsigned Depth : 15; 2322 unsigned Index : 16; 2323 unsigned ParameterPack : 1; 2324 IdentifierInfo *Name; 2325 2326 TemplateTypeParmType(unsigned D, unsigned I, bool PP, IdentifierInfo *N, 2327 QualType Canon) 2328 : Type(TemplateTypeParm, Canon, /*Dependent=*/true), 2329 Depth(D), Index(I), ParameterPack(PP), Name(N) { } 2330 2331 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 2332 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true), 2333 Depth(D), Index(I), ParameterPack(PP), Name(0) { } 2334 2335 friend class ASTContext; // ASTContext creates these 2336 2337public: 2338 unsigned getDepth() const { return Depth; } 2339 unsigned getIndex() const { return Index; } 2340 bool isParameterPack() const { return ParameterPack; } 2341 IdentifierInfo *getName() const { return Name; } 2342 2343 bool isSugared() const { return false; } 2344 QualType desugar() const { return QualType(this, 0); } 2345 2346 void Profile(llvm::FoldingSetNodeID &ID) { 2347 Profile(ID, Depth, Index, ParameterPack, Name); 2348 } 2349 2350 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 2351 unsigned Index, bool ParameterPack, 2352 IdentifierInfo *Name) { 2353 ID.AddInteger(Depth); 2354 ID.AddInteger(Index); 2355 ID.AddBoolean(ParameterPack); 2356 ID.AddPointer(Name); 2357 } 2358 2359 static bool classof(const Type *T) { 2360 return T->getTypeClass() == TemplateTypeParm; 2361 } 2362 static bool classof(const TemplateTypeParmType *T) { return true; } 2363}; 2364 2365/// \brief Represents the result of substituting a type for a template 2366/// type parameter. 2367/// 2368/// Within an instantiated template, all template type parameters have 2369/// been replaced with these. They are used solely to record that a 2370/// type was originally written as a template type parameter; 2371/// therefore they are never canonical. 2372class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2373 // The original type parameter. 2374 const TemplateTypeParmType *Replaced; 2375 2376 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 2377 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType()), 2378 Replaced(Param) { } 2379 2380 friend class ASTContext; 2381 2382public: 2383 IdentifierInfo *getName() const { return Replaced->getName(); } 2384 2385 /// Gets the template parameter that was substituted for. 2386 const TemplateTypeParmType *getReplacedParameter() const { 2387 return Replaced; 2388 } 2389 2390 /// Gets the type that was substituted for the template 2391 /// parameter. 2392 QualType getReplacementType() const { 2393 return getCanonicalTypeInternal(); 2394 } 2395 2396 bool isSugared() const { return true; } 2397 QualType desugar() const { return getReplacementType(); } 2398 2399 void Profile(llvm::FoldingSetNodeID &ID) { 2400 Profile(ID, getReplacedParameter(), getReplacementType()); 2401 } 2402 static void Profile(llvm::FoldingSetNodeID &ID, 2403 const TemplateTypeParmType *Replaced, 2404 QualType Replacement) { 2405 ID.AddPointer(Replaced); 2406 ID.AddPointer(Replacement.getAsOpaquePtr()); 2407 } 2408 2409 static bool classof(const Type *T) { 2410 return T->getTypeClass() == SubstTemplateTypeParm; 2411 } 2412 static bool classof(const SubstTemplateTypeParmType *T) { return true; } 2413}; 2414 2415/// \brief Represents the type of a template specialization as written 2416/// in the source code. 2417/// 2418/// Template specialization types represent the syntactic form of a 2419/// template-id that refers to a type, e.g., @c vector<int>. Some 2420/// template specialization types are syntactic sugar, whose canonical 2421/// type will point to some other type node that represents the 2422/// instantiation or class template specialization. For example, a 2423/// class template specialization type of @c vector<int> will refer to 2424/// a tag type for the instantiation 2425/// @c std::vector<int, std::allocator<int>>. 2426/// 2427/// Other template specialization types, for which the template name 2428/// is dependent, may be canonical types. These types are always 2429/// dependent. 2430class TemplateSpecializationType 2431 : public Type, public llvm::FoldingSetNode { 2432 2433 // FIXME: Currently needed for profiling expressions; can we avoid this? 2434 ASTContext &Context; 2435 2436 /// \brief The name of the template being specialized. 2437 TemplateName Template; 2438 2439 /// \brief - The number of template arguments named in this class 2440 /// template specialization. 2441 unsigned NumArgs; 2442 2443 TemplateSpecializationType(ASTContext &Context, 2444 TemplateName T, 2445 const TemplateArgument *Args, 2446 unsigned NumArgs, QualType Canon); 2447 2448 virtual void Destroy(ASTContext& C); 2449 2450 friend class ASTContext; // ASTContext creates these 2451 2452public: 2453 /// \brief Determine whether any of the given template arguments are 2454 /// dependent. 2455 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 2456 unsigned NumArgs); 2457 2458 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 2459 unsigned NumArgs); 2460 2461 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &); 2462 2463 /// \brief Print a template argument list, including the '<' and '>' 2464 /// enclosing the template arguments. 2465 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 2466 unsigned NumArgs, 2467 const PrintingPolicy &Policy); 2468 2469 static std::string PrintTemplateArgumentList(const TemplateArgumentLoc *Args, 2470 unsigned NumArgs, 2471 const PrintingPolicy &Policy); 2472 2473 static std::string PrintTemplateArgumentList(const TemplateArgumentListInfo &, 2474 const PrintingPolicy &Policy); 2475 2476 typedef const TemplateArgument * iterator; 2477 2478 iterator begin() const { return getArgs(); } 2479 iterator end() const; 2480 2481 /// \brief Retrieve the name of the template that we are specializing. 2482 TemplateName getTemplateName() const { return Template; } 2483 2484 /// \brief Retrieve the template arguments. 2485 const TemplateArgument *getArgs() const { 2486 return reinterpret_cast<const TemplateArgument *>(this + 1); 2487 } 2488 2489 /// \brief Retrieve the number of template arguments. 2490 unsigned getNumArgs() const { return NumArgs; } 2491 2492 /// \brief Retrieve a specific template argument as a type. 2493 /// \precondition @c isArgType(Arg) 2494 const TemplateArgument &getArg(unsigned Idx) const; 2495 2496 bool isSugared() const { return !isDependentType(); } 2497 QualType desugar() const { return getCanonicalTypeInternal(); } 2498 2499 void Profile(llvm::FoldingSetNodeID &ID) { 2500 Profile(ID, Template, getArgs(), NumArgs, Context); 2501 } 2502 2503 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 2504 const TemplateArgument *Args, unsigned NumArgs, 2505 ASTContext &Context); 2506 2507 static bool classof(const Type *T) { 2508 return T->getTypeClass() == TemplateSpecialization; 2509 } 2510 static bool classof(const TemplateSpecializationType *T) { return true; } 2511}; 2512 2513/// \brief The injected class name of a C++ class template. Used to 2514/// record that a type was spelled with a bare identifier rather than 2515/// as a template-id; the equivalent for non-templated classes is just 2516/// RecordType. 2517/// 2518/// For consistency, template instantiation turns these into RecordTypes. 2519/// 2520/// The desugared form is always a unqualified TemplateSpecializationType. 2521/// The canonical form is always either a TemplateSpecializationType 2522/// (when dependent) or a RecordType (otherwise). 2523class InjectedClassNameType : public Type { 2524 CXXRecordDecl *Decl; 2525 2526 QualType UnderlyingType; 2527 2528 friend class ASTContext; // ASTContext creates these. 2529 InjectedClassNameType(CXXRecordDecl *D, QualType TST, QualType Canon) 2530 : Type(InjectedClassName, Canon, Canon->isDependentType()), 2531 Decl(D), UnderlyingType(TST) { 2532 assert(isa<TemplateSpecializationType>(TST)); 2533 assert(!TST.hasQualifiers()); 2534 assert(TST->getCanonicalTypeInternal() == Canon); 2535 } 2536 2537public: 2538 QualType getUnderlyingType() const { return UnderlyingType; } 2539 const TemplateSpecializationType *getUnderlyingTST() const { 2540 return cast<TemplateSpecializationType>(UnderlyingType.getTypePtr()); 2541 } 2542 2543 CXXRecordDecl *getDecl() const { return Decl; } 2544 2545 bool isSugared() const { return true; } 2546 QualType desugar() const { return UnderlyingType; } 2547 2548 static bool classof(const Type *T) { 2549 return T->getTypeClass() == InjectedClassName; 2550 } 2551 static bool classof(const InjectedClassNameType *T) { return true; } 2552}; 2553 2554/// \brief Represents a type that was referred to via a qualified 2555/// name, e.g., N::M::type. 2556/// 2557/// This type is used to keep track of a type name as written in the 2558/// source code, including any nested-name-specifiers. The type itself 2559/// is always "sugar", used to express what was written in the source 2560/// code but containing no additional semantic information. 2561class QualifiedNameType : public Type, public llvm::FoldingSetNode { 2562 /// \brief The nested name specifier containing the qualifier. 2563 NestedNameSpecifier *NNS; 2564 2565 /// \brief The type that this qualified name refers to. 2566 QualType NamedType; 2567 2568 QualifiedNameType(NestedNameSpecifier *NNS, QualType NamedType, 2569 QualType CanonType) 2570 : Type(QualifiedName, CanonType, NamedType->isDependentType()), 2571 NNS(NNS), NamedType(NamedType) { } 2572 2573 friend class ASTContext; // ASTContext creates these 2574 2575public: 2576 /// \brief Retrieve the qualification on this type. 2577 NestedNameSpecifier *getQualifier() const { return NNS; } 2578 2579 /// \brief Retrieve the type named by the qualified-id. 2580 QualType getNamedType() const { return NamedType; } 2581 2582 /// \brief Remove a single level of sugar. 2583 QualType desugar() const { return getNamedType(); } 2584 2585 /// \brief Returns whether this type directly provides sugar. 2586 bool isSugared() const { return true; } 2587 2588 void Profile(llvm::FoldingSetNodeID &ID) { 2589 Profile(ID, NNS, NamedType); 2590 } 2591 2592 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 2593 QualType NamedType) { 2594 ID.AddPointer(NNS); 2595 NamedType.Profile(ID); 2596 } 2597 2598 static bool classof(const Type *T) { 2599 return T->getTypeClass() == QualifiedName; 2600 } 2601 static bool classof(const QualifiedNameType *T) { return true; } 2602}; 2603 2604/// \brief Represents a 'typename' specifier that names a type within 2605/// a dependent type, e.g., "typename T::type". 2606/// 2607/// DependentNameType has a very similar structure to QualifiedNameType, 2608/// which also involves a nested-name-specifier following by a type, 2609/// and (FIXME!) both can even be prefixed by the 'typename' 2610/// keyword. However, the two types serve very different roles: 2611/// QualifiedNameType is a non-semantic type that serves only as sugar 2612/// to show how a particular type was written in the source 2613/// code. DependentNameType, on the other hand, only occurs when the 2614/// nested-name-specifier is dependent, such that we cannot resolve 2615/// the actual type until after instantiation. 2616class DependentNameType : public Type, public llvm::FoldingSetNode { 2617 /// \brief The nested name specifier containing the qualifier. 2618 NestedNameSpecifier *NNS; 2619 2620 typedef llvm::PointerUnion<const IdentifierInfo *, 2621 const TemplateSpecializationType *> NameType; 2622 2623 /// \brief The type that this typename specifier refers to. 2624 NameType Name; 2625 2626 DependentNameType(NestedNameSpecifier *NNS, const IdentifierInfo *Name, 2627 QualType CanonType) 2628 : Type(DependentName, CanonType, true), NNS(NNS), Name(Name) { 2629 assert(NNS->isDependent() && 2630 "DependentNameType requires a dependent nested-name-specifier"); 2631 } 2632 2633 DependentNameType(NestedNameSpecifier *NNS, const TemplateSpecializationType *Ty, 2634 QualType CanonType) 2635 : Type(DependentName, CanonType, true), NNS(NNS), Name(Ty) { 2636 assert(NNS->isDependent() && 2637 "DependentNameType requires a dependent nested-name-specifier"); 2638 } 2639 2640 friend class ASTContext; // ASTContext creates these 2641 2642public: 2643 /// \brief Retrieve the qualification on this type. 2644 NestedNameSpecifier *getQualifier() const { return NNS; } 2645 2646 /// \brief Retrieve the type named by the typename specifier as an 2647 /// identifier. 2648 /// 2649 /// This routine will return a non-NULL identifier pointer when the 2650 /// form of the original typename was terminated by an identifier, 2651 /// e.g., "typename T::type". 2652 const IdentifierInfo *getIdentifier() const { 2653 return Name.dyn_cast<const IdentifierInfo *>(); 2654 } 2655 2656 /// \brief Retrieve the type named by the typename specifier as a 2657 /// type specialization. 2658 const TemplateSpecializationType *getTemplateId() const { 2659 return Name.dyn_cast<const TemplateSpecializationType *>(); 2660 } 2661 2662 bool isSugared() const { return false; } 2663 QualType desugar() const { return QualType(this, 0); } 2664 2665 void Profile(llvm::FoldingSetNodeID &ID) { 2666 Profile(ID, NNS, Name); 2667 } 2668 2669 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 2670 NameType Name) { 2671 ID.AddPointer(NNS); 2672 ID.AddPointer(Name.getOpaqueValue()); 2673 } 2674 2675 static bool classof(const Type *T) { 2676 return T->getTypeClass() == DependentName; 2677 } 2678 static bool classof(const DependentNameType *T) { return true; } 2679}; 2680 2681/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 2682/// object oriented design. They basically correspond to C++ classes. There 2683/// are two kinds of interface types, normal interfaces like "NSString" and 2684/// qualified interfaces, which are qualified with a protocol list like 2685/// "NSString<NSCopyable, NSAmazing>". 2686class ObjCInterfaceType : public Type, public llvm::FoldingSetNode { 2687 ObjCInterfaceDecl *Decl; 2688 2689 /// \brief The number of protocols stored after the ObjCInterfaceType node. 2690 /// The list of protocols is sorted on protocol name. No protocol is enterred 2691 /// more than once. 2692 unsigned NumProtocols; 2693 2694 ObjCInterfaceType(QualType Canonical, ObjCInterfaceDecl *D, 2695 ObjCProtocolDecl **Protos, unsigned NumP); 2696 friend class ASTContext; // ASTContext creates these. 2697public: 2698 void Destroy(ASTContext& C); 2699 2700 ObjCInterfaceDecl *getDecl() const { return Decl; } 2701 2702 /// getNumProtocols - Return the number of qualifying protocols in this 2703 /// interface type, or 0 if there are none. 2704 unsigned getNumProtocols() const { return NumProtocols; } 2705 2706 /// \brief Retrieve the Ith protocol. 2707 ObjCProtocolDecl *getProtocol(unsigned I) const { 2708 assert(I < getNumProtocols() && "Out-of-range protocol access"); 2709 return qual_begin()[I]; 2710 } 2711 2712 /// qual_iterator and friends: this provides access to the (potentially empty) 2713 /// list of protocols qualifying this interface. 2714 typedef ObjCProtocolDecl* const * qual_iterator; 2715 qual_iterator qual_begin() const { 2716 return reinterpret_cast<qual_iterator>(this + 1); 2717 } 2718 qual_iterator qual_end() const { 2719 return qual_begin() + NumProtocols; 2720 } 2721 bool qual_empty() const { return NumProtocols == 0; } 2722 2723 bool isSugared() const { return false; } 2724 QualType desugar() const { return QualType(this, 0); } 2725 2726 void Profile(llvm::FoldingSetNodeID &ID); 2727 static void Profile(llvm::FoldingSetNodeID &ID, 2728 const ObjCInterfaceDecl *Decl, 2729 ObjCProtocolDecl * const *protocols, 2730 unsigned NumProtocols); 2731 2732 virtual Linkage getLinkage() const; 2733 2734 static bool classof(const Type *T) { 2735 return T->getTypeClass() == ObjCInterface; 2736 } 2737 static bool classof(const ObjCInterfaceType *) { return true; } 2738}; 2739 2740/// ObjCObjectPointerType - Used to represent 'id', 'Interface *', 'id <p>', 2741/// and 'Interface <p> *'. 2742/// 2743/// Duplicate protocols are removed and protocol list is canonicalized to be in 2744/// alphabetical order. 2745class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 2746 QualType PointeeType; // A builtin or interface type. 2747 2748 /// \brief The number of protocols stored after the ObjCObjectPointerType 2749 /// node. 2750 /// 2751 /// The list of protocols is sorted on protocol name. No protocol is enterred 2752 /// more than once. 2753 unsigned NumProtocols; 2754 2755 ObjCObjectPointerType(QualType Canonical, QualType T, 2756 ObjCProtocolDecl **Protos, unsigned NumP); 2757 friend class ASTContext; // ASTContext creates these. 2758 2759public: 2760 void Destroy(ASTContext& C); 2761 2762 // Get the pointee type. Pointee will either be: 2763 // - a built-in type (for 'id' and 'Class'). 2764 // - an interface type (for user-defined types). 2765 // - a TypedefType whose canonical type is an interface (as in 'T' below). 2766 // For example: typedef NSObject T; T *var; 2767 QualType getPointeeType() const { return PointeeType; } 2768 2769 const ObjCInterfaceType *getInterfaceType() const { 2770 return PointeeType->getAs<ObjCInterfaceType>(); 2771 } 2772 /// getInterfaceDecl - returns an interface decl for user-defined types. 2773 ObjCInterfaceDecl *getInterfaceDecl() const { 2774 return getInterfaceType() ? getInterfaceType()->getDecl() : 0; 2775 } 2776 /// isObjCIdType - true for "id". 2777 bool isObjCIdType() const { 2778 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCId) && 2779 !NumProtocols; 2780 } 2781 /// isObjCClassType - true for "Class". 2782 bool isObjCClassType() const { 2783 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCClass) && 2784 !NumProtocols; 2785 } 2786 2787 /// isObjCQualifiedIdType - true for "id <p>". 2788 bool isObjCQualifiedIdType() const { 2789 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCId) && 2790 NumProtocols; 2791 } 2792 /// isObjCQualifiedClassType - true for "Class <p>". 2793 bool isObjCQualifiedClassType() const { 2794 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCClass) && 2795 NumProtocols; 2796 } 2797 /// qual_iterator and friends: this provides access to the (potentially empty) 2798 /// list of protocols qualifying this interface. 2799 typedef ObjCProtocolDecl* const * qual_iterator; 2800 2801 qual_iterator qual_begin() const { 2802 return reinterpret_cast<qual_iterator> (this + 1); 2803 } 2804 qual_iterator qual_end() const { 2805 return qual_begin() + NumProtocols; 2806 } 2807 bool qual_empty() const { return NumProtocols == 0; } 2808 2809 /// getNumProtocols - Return the number of qualifying protocols in this 2810 /// interface type, or 0 if there are none. 2811 unsigned getNumProtocols() const { return NumProtocols; } 2812 2813 /// \brief Retrieve the Ith protocol. 2814 ObjCProtocolDecl *getProtocol(unsigned I) const { 2815 assert(I < getNumProtocols() && "Out-of-range protocol access"); 2816 return qual_begin()[I]; 2817 } 2818 2819 bool isSugared() const { return false; } 2820 QualType desugar() const { return QualType(this, 0); } 2821 2822 virtual Linkage getLinkage() const; 2823 2824 void Profile(llvm::FoldingSetNodeID &ID); 2825 static void Profile(llvm::FoldingSetNodeID &ID, QualType T, 2826 ObjCProtocolDecl *const *protocols, 2827 unsigned NumProtocols); 2828 static bool classof(const Type *T) { 2829 return T->getTypeClass() == ObjCObjectPointer; 2830 } 2831 static bool classof(const ObjCObjectPointerType *) { return true; } 2832}; 2833 2834/// A qualifier set is used to build a set of qualifiers. 2835class QualifierCollector : public Qualifiers { 2836 ASTContext *Context; 2837 2838public: 2839 QualifierCollector(Qualifiers Qs = Qualifiers()) 2840 : Qualifiers(Qs), Context(0) {} 2841 QualifierCollector(ASTContext &Context, Qualifiers Qs = Qualifiers()) 2842 : Qualifiers(Qs), Context(&Context) {} 2843 2844 void setContext(ASTContext &C) { Context = &C; } 2845 2846 /// Collect any qualifiers on the given type and return an 2847 /// unqualified type. 2848 const Type *strip(QualType QT) { 2849 addFastQualifiers(QT.getLocalFastQualifiers()); 2850 if (QT.hasLocalNonFastQualifiers()) { 2851 const ExtQuals *EQ = QT.getExtQualsUnsafe(); 2852 Context = &EQ->getContext(); 2853 addQualifiers(EQ->getQualifiers()); 2854 return EQ->getBaseType(); 2855 } 2856 return QT.getTypePtrUnsafe(); 2857 } 2858 2859 /// Apply the collected qualifiers to the given type. 2860 QualType apply(QualType QT) const; 2861 2862 /// Apply the collected qualifiers to the given type. 2863 QualType apply(const Type* T) const; 2864 2865}; 2866 2867 2868// Inline function definitions. 2869 2870inline bool QualType::isCanonical() const { 2871 const Type *T = getTypePtr(); 2872 if (hasLocalQualifiers()) 2873 return T->isCanonicalUnqualified() && !isa<ArrayType>(T); 2874 return T->isCanonicalUnqualified(); 2875} 2876 2877inline bool QualType::isCanonicalAsParam() const { 2878 if (hasLocalQualifiers()) return false; 2879 const Type *T = getTypePtr(); 2880 return T->isCanonicalUnqualified() && 2881 !isa<FunctionType>(T) && !isa<ArrayType>(T); 2882} 2883 2884inline bool QualType::isConstQualified() const { 2885 return isLocalConstQualified() || 2886 getTypePtr()->getCanonicalTypeInternal().isLocalConstQualified(); 2887} 2888 2889inline bool QualType::isRestrictQualified() const { 2890 return isLocalRestrictQualified() || 2891 getTypePtr()->getCanonicalTypeInternal().isLocalRestrictQualified(); 2892} 2893 2894 2895inline bool QualType::isVolatileQualified() const { 2896 return isLocalVolatileQualified() || 2897 getTypePtr()->getCanonicalTypeInternal().isLocalVolatileQualified(); 2898} 2899 2900inline bool QualType::hasQualifiers() const { 2901 return hasLocalQualifiers() || 2902 getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers(); 2903} 2904 2905inline Qualifiers QualType::getQualifiers() const { 2906 Qualifiers Quals = getLocalQualifiers(); 2907 Quals.addQualifiers( 2908 getTypePtr()->getCanonicalTypeInternal().getLocalQualifiers()); 2909 return Quals; 2910} 2911 2912inline unsigned QualType::getCVRQualifiers() const { 2913 return getLocalCVRQualifiers() | 2914 getTypePtr()->getCanonicalTypeInternal().getLocalCVRQualifiers(); 2915} 2916 2917/// getCVRQualifiersThroughArrayTypes - If there are CVR qualifiers for this 2918/// type, returns them. Otherwise, if this is an array type, recurses 2919/// on the element type until some qualifiers have been found or a non-array 2920/// type reached. 2921inline unsigned QualType::getCVRQualifiersThroughArrayTypes() const { 2922 if (unsigned Quals = getCVRQualifiers()) 2923 return Quals; 2924 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2925 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 2926 return AT->getElementType().getCVRQualifiersThroughArrayTypes(); 2927 return 0; 2928} 2929 2930inline void QualType::removeConst() { 2931 removeFastQualifiers(Qualifiers::Const); 2932} 2933 2934inline void QualType::removeRestrict() { 2935 removeFastQualifiers(Qualifiers::Restrict); 2936} 2937 2938inline void QualType::removeVolatile() { 2939 QualifierCollector Qc; 2940 const Type *Ty = Qc.strip(*this); 2941 if (Qc.hasVolatile()) { 2942 Qc.removeVolatile(); 2943 *this = Qc.apply(Ty); 2944 } 2945} 2946 2947inline void QualType::removeCVRQualifiers(unsigned Mask) { 2948 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 2949 2950 // Fast path: we don't need to touch the slow qualifiers. 2951 if (!(Mask & ~Qualifiers::FastMask)) { 2952 removeFastQualifiers(Mask); 2953 return; 2954 } 2955 2956 QualifierCollector Qc; 2957 const Type *Ty = Qc.strip(*this); 2958 Qc.removeCVRQualifiers(Mask); 2959 *this = Qc.apply(Ty); 2960} 2961 2962/// getAddressSpace - Return the address space of this type. 2963inline unsigned QualType::getAddressSpace() const { 2964 if (hasLocalNonFastQualifiers()) { 2965 const ExtQuals *EQ = getExtQualsUnsafe(); 2966 if (EQ->hasAddressSpace()) 2967 return EQ->getAddressSpace(); 2968 } 2969 2970 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2971 if (CT.hasLocalNonFastQualifiers()) { 2972 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 2973 if (EQ->hasAddressSpace()) 2974 return EQ->getAddressSpace(); 2975 } 2976 2977 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 2978 return AT->getElementType().getAddressSpace(); 2979 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 2980 return RT->getAddressSpace(); 2981 return 0; 2982} 2983 2984/// getObjCGCAttr - Return the gc attribute of this type. 2985inline Qualifiers::GC QualType::getObjCGCAttr() const { 2986 if (hasLocalNonFastQualifiers()) { 2987 const ExtQuals *EQ = getExtQualsUnsafe(); 2988 if (EQ->hasObjCGCAttr()) 2989 return EQ->getObjCGCAttr(); 2990 } 2991 2992 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2993 if (CT.hasLocalNonFastQualifiers()) { 2994 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 2995 if (EQ->hasObjCGCAttr()) 2996 return EQ->getObjCGCAttr(); 2997 } 2998 2999 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3000 return AT->getElementType().getObjCGCAttr(); 3001 if (const ObjCObjectPointerType *PT = CT->getAs<ObjCObjectPointerType>()) 3002 return PT->getPointeeType().getObjCGCAttr(); 3003 // We most look at all pointer types, not just pointer to interface types. 3004 if (const PointerType *PT = CT->getAs<PointerType>()) 3005 return PT->getPointeeType().getObjCGCAttr(); 3006 return Qualifiers::GCNone; 3007} 3008 3009inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { 3010 if (const PointerType *PT = t.getAs<PointerType>()) { 3011 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 3012 return FT->getExtInfo(); 3013 } else if (const FunctionType *FT = t.getAs<FunctionType>()) 3014 return FT->getExtInfo(); 3015 3016 return FunctionType::ExtInfo(); 3017} 3018 3019inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { 3020 return getFunctionExtInfo(*t); 3021} 3022 3023/// isMoreQualifiedThan - Determine whether this type is more 3024/// qualified than the Other type. For example, "const volatile int" 3025/// is more qualified than "const int", "volatile int", and 3026/// "int". However, it is not more qualified than "const volatile 3027/// int". 3028inline bool QualType::isMoreQualifiedThan(QualType Other) const { 3029 // FIXME: work on arbitrary qualifiers 3030 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 3031 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 3032 if (getAddressSpace() != Other.getAddressSpace()) 3033 return false; 3034 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 3035} 3036 3037/// isAtLeastAsQualifiedAs - Determine whether this type is at last 3038/// as qualified as the Other type. For example, "const volatile 3039/// int" is at least as qualified as "const int", "volatile int", 3040/// "int", and "const volatile int". 3041inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 3042 // FIXME: work on arbitrary qualifiers 3043 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 3044 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 3045 if (getAddressSpace() != Other.getAddressSpace()) 3046 return false; 3047 return (MyQuals | OtherQuals) == MyQuals; 3048} 3049 3050/// getNonReferenceType - If Type is a reference type (e.g., const 3051/// int&), returns the type that the reference refers to ("const 3052/// int"). Otherwise, returns the type itself. This routine is used 3053/// throughout Sema to implement C++ 5p6: 3054/// 3055/// If an expression initially has the type "reference to T" (8.3.2, 3056/// 8.5.3), the type is adjusted to "T" prior to any further 3057/// analysis, the expression designates the object or function 3058/// denoted by the reference, and the expression is an lvalue. 3059inline QualType QualType::getNonReferenceType() const { 3060 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 3061 return RefType->getPointeeType(); 3062 else 3063 return *this; 3064} 3065 3066inline const ObjCInterfaceType *Type::getAsPointerToObjCInterfaceType() const { 3067 if (const PointerType *PT = getAs<PointerType>()) 3068 return PT->getPointeeType()->getAs<ObjCInterfaceType>(); 3069 return 0; 3070} 3071 3072inline bool Type::isFunctionType() const { 3073 return isa<FunctionType>(CanonicalType); 3074} 3075inline bool Type::isPointerType() const { 3076 return isa<PointerType>(CanonicalType); 3077} 3078inline bool Type::isAnyPointerType() const { 3079 return isPointerType() || isObjCObjectPointerType(); 3080} 3081inline bool Type::isBlockPointerType() const { 3082 return isa<BlockPointerType>(CanonicalType); 3083} 3084inline bool Type::isReferenceType() const { 3085 return isa<ReferenceType>(CanonicalType); 3086} 3087inline bool Type::isLValueReferenceType() const { 3088 return isa<LValueReferenceType>(CanonicalType); 3089} 3090inline bool Type::isRValueReferenceType() const { 3091 return isa<RValueReferenceType>(CanonicalType); 3092} 3093inline bool Type::isFunctionPointerType() const { 3094 if (const PointerType* T = getAs<PointerType>()) 3095 return T->getPointeeType()->isFunctionType(); 3096 else 3097 return false; 3098} 3099inline bool Type::isMemberPointerType() const { 3100 return isa<MemberPointerType>(CanonicalType); 3101} 3102inline bool Type::isMemberFunctionPointerType() const { 3103 if (const MemberPointerType* T = getAs<MemberPointerType>()) 3104 return T->getPointeeType()->isFunctionType(); 3105 else 3106 return false; 3107} 3108inline bool Type::isArrayType() const { 3109 return isa<ArrayType>(CanonicalType); 3110} 3111inline bool Type::isConstantArrayType() const { 3112 return isa<ConstantArrayType>(CanonicalType); 3113} 3114inline bool Type::isIncompleteArrayType() const { 3115 return isa<IncompleteArrayType>(CanonicalType); 3116} 3117inline bool Type::isVariableArrayType() const { 3118 return isa<VariableArrayType>(CanonicalType); 3119} 3120inline bool Type::isDependentSizedArrayType() const { 3121 return isa<DependentSizedArrayType>(CanonicalType); 3122} 3123inline bool Type::isRecordType() const { 3124 return isa<RecordType>(CanonicalType); 3125} 3126inline bool Type::isAnyComplexType() const { 3127 return isa<ComplexType>(CanonicalType); 3128} 3129inline bool Type::isVectorType() const { 3130 return isa<VectorType>(CanonicalType); 3131} 3132inline bool Type::isExtVectorType() const { 3133 return isa<ExtVectorType>(CanonicalType); 3134} 3135inline bool Type::isObjCObjectPointerType() const { 3136 return isa<ObjCObjectPointerType>(CanonicalType); 3137} 3138inline bool Type::isObjCInterfaceType() const { 3139 return isa<ObjCInterfaceType>(CanonicalType); 3140} 3141inline bool Type::isObjCQualifiedIdType() const { 3142 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3143 return OPT->isObjCQualifiedIdType(); 3144 return false; 3145} 3146inline bool Type::isObjCQualifiedClassType() const { 3147 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3148 return OPT->isObjCQualifiedClassType(); 3149 return false; 3150} 3151inline bool Type::isObjCIdType() const { 3152 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3153 return OPT->isObjCIdType(); 3154 return false; 3155} 3156inline bool Type::isObjCClassType() const { 3157 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3158 return OPT->isObjCClassType(); 3159 return false; 3160} 3161inline bool Type::isObjCSelType() const { 3162 if (const PointerType *OPT = getAs<PointerType>()) 3163 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 3164 return false; 3165} 3166inline bool Type::isObjCBuiltinType() const { 3167 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 3168} 3169inline bool Type::isTemplateTypeParmType() const { 3170 return isa<TemplateTypeParmType>(CanonicalType); 3171} 3172 3173inline bool Type::isSpecificBuiltinType(unsigned K) const { 3174 if (const BuiltinType *BT = getAs<BuiltinType>()) 3175 if (BT->getKind() == (BuiltinType::Kind) K) 3176 return true; 3177 return false; 3178} 3179 3180/// \brief Determines whether this is a type for which one can define 3181/// an overloaded operator. 3182inline bool Type::isOverloadableType() const { 3183 return isDependentType() || isRecordType() || isEnumeralType(); 3184} 3185 3186inline bool Type::hasPointerRepresentation() const { 3187 return (isPointerType() || isReferenceType() || isBlockPointerType() || 3188 isObjCInterfaceType() || isObjCObjectPointerType() || 3189 isObjCQualifiedInterfaceType() || isNullPtrType()); 3190} 3191 3192inline bool Type::hasObjCPointerRepresentation() const { 3193 return (isObjCInterfaceType() || isObjCObjectPointerType() || 3194 isObjCQualifiedInterfaceType()); 3195} 3196 3197/// Insertion operator for diagnostics. This allows sending QualType's into a 3198/// diagnostic with <<. 3199inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 3200 QualType T) { 3201 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 3202 Diagnostic::ak_qualtype); 3203 return DB; 3204} 3205 3206// Helper class template that is used by Type::getAs to ensure that one does 3207// not try to look through a qualified type to get to an array type. 3208template<typename T, 3209 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 3210 llvm::is_base_of<ArrayType, T>::value)> 3211struct ArrayType_cannot_be_used_with_getAs { }; 3212 3213template<typename T> 3214struct ArrayType_cannot_be_used_with_getAs<T, true>; 3215 3216/// Member-template getAs<specific type>'. 3217template <typename T> const T *Type::getAs() const { 3218 ArrayType_cannot_be_used_with_getAs<T> at; 3219 (void)at; 3220 3221 // If this is directly a T type, return it. 3222 if (const T *Ty = dyn_cast<T>(this)) 3223 return Ty; 3224 3225 // If the canonical form of this type isn't the right kind, reject it. 3226 if (!isa<T>(CanonicalType)) 3227 return 0; 3228 3229 // If this is a typedef for the type, strip the typedef off without 3230 // losing all typedef information. 3231 return cast<T>(getUnqualifiedDesugaredType()); 3232} 3233 3234#ifndef NDEBUG 3235 /// \brief The number of times we have dynamically checked for an 3236 /// Objective-C-specific type node. 3237 extern llvm::Statistic objc_type_checks; 3238 3239 /// \brief The number of times we have dynamically checked for a 3240 /// C++-specific type node. 3241 extern llvm::Statistic cxx_type_checks; 3242#endif 3243} // end namespace clang 3244 3245// Enumerate Objective-C types 3246CLANG_ISA_STATISTIC(ObjCInterfaceType, objc_type_checks) 3247CLANG_ISA_STATISTIC(ObjCObjectPointerType, objc_type_checks) 3248 3249// Enumerate C++ types 3250CLANG_ISA_STATISTIC(ReferenceType, cxx_type_checks) 3251CLANG_ISA_STATISTIC(LValueReferenceType, cxx_type_checks) 3252CLANG_ISA_STATISTIC(RValueReferenceType, cxx_type_checks) 3253CLANG_ISA_STATISTIC(MemberPointerType, cxx_type_checks) 3254CLANG_ISA_STATISTIC(DependentSizedArrayType, cxx_type_checks) 3255CLANG_ISA_STATISTIC(DependentSizedExtVectorType, cxx_type_checks) 3256CLANG_ISA_STATISTIC(UnresolvedUsingType, cxx_type_checks) 3257CLANG_ISA_STATISTIC(DecltypeType, cxx_type_checks) 3258CLANG_ISA_STATISTIC(TemplateTypeParmType, cxx_type_checks) 3259CLANG_ISA_STATISTIC(SubstTemplateTypeParmType, cxx_type_checks) 3260CLANG_ISA_STATISTIC(TemplateSpecializationType, cxx_type_checks) 3261CLANG_ISA_STATISTIC(QualifiedNameType, cxx_type_checks) 3262CLANG_ISA_STATISTIC(InjectedClassNameType, cxx_type_checks) 3263CLANG_ISA_STATISTIC(DependentNameType, cxx_type_checks) 3264 3265#endif 3266