Type.h revision fb87b89fc9eb103e19fb8e4b925c23f0bd091b99
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/Basic/PartialDiagnostic.h" 21#include "clang/AST/NestedNameSpecifier.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 isStructureOrClassType() const; 875 bool isUnionType() const; 876 bool isComplexIntegerType() const; // GCC _Complex integer type. 877 bool isVectorType() const; // GCC vector type. 878 bool isExtVectorType() const; // Extended vector type. 879 bool isObjCObjectPointerType() const; // Pointer to *any* ObjC object. 880 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 881 // for the common case. 882 bool isObjCInterfaceType() const; // NSString or NSString<foo> 883 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 884 bool isObjCQualifiedIdType() const; // id<foo> 885 bool isObjCQualifiedClassType() const; // Class<foo> 886 bool isObjCIdType() const; // id 887 bool isObjCClassType() const; // Class 888 bool isObjCSelType() const; // Class 889 bool isObjCBuiltinType() const; // 'id' or 'Class' 890 bool isTemplateTypeParmType() const; // C++ template type parameter 891 bool isNullPtrType() const; // C++0x nullptr_t 892 893 /// isDependentType - Whether this type is a dependent type, meaning 894 /// that its definition somehow depends on a template parameter 895 /// (C++ [temp.dep.type]). 896 bool isDependentType() const { return Dependent; } 897 bool isOverloadableType() const; 898 899 /// \brief Determine wither this type is a C++ elaborated-type-specifier. 900 bool isElaboratedTypeSpecifier() const; 901 902 /// hasPointerRepresentation - Whether this type is represented 903 /// natively as a pointer; this includes pointers, references, block 904 /// pointers, and Objective-C interface, qualified id, and qualified 905 /// interface types, as well as nullptr_t. 906 bool hasPointerRepresentation() const; 907 908 /// hasObjCPointerRepresentation - Whether this type can represent 909 /// an objective pointer type for the purpose of GC'ability 910 bool hasObjCPointerRepresentation() const; 911 912 // Type Checking Functions: Check to see if this type is structurally the 913 // specified type, ignoring typedefs and qualifiers, and return a pointer to 914 // the best type we can. 915 const RecordType *getAsStructureType() const; 916 /// NOTE: getAs*ArrayType are methods on ASTContext. 917 const RecordType *getAsUnionType() const; 918 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 919 // The following is a convenience method that returns an ObjCObjectPointerType 920 // for object declared using an interface. 921 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 922 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 923 const ObjCInterfaceType *getAsObjCQualifiedInterfaceType() const; 924 const CXXRecordDecl *getCXXRecordDeclForPointerType() const; 925 926 // Member-template getAs<specific type>'. This scheme will eventually 927 // replace the specific getAsXXXX methods above. 928 // 929 // There are some specializations of this member template listed 930 // immediately following this class. 931 template <typename T> const T *getAs() const; 932 933 /// getAsPointerToObjCInterfaceType - If this is a pointer to an ObjC 934 /// interface, return the interface type, otherwise return null. 935 const ObjCInterfaceType *getAsPointerToObjCInterfaceType() const; 936 937 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 938 /// element type of the array, potentially with type qualifiers missing. 939 /// This method should never be used when type qualifiers are meaningful. 940 const Type *getArrayElementTypeNoTypeQual() const; 941 942 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 943 /// pointer, this returns the respective pointee. 944 QualType getPointeeType() const; 945 946 /// getUnqualifiedDesugaredType() - Return the specified type with 947 /// any "sugar" removed from the type, removing any typedefs, 948 /// typeofs, etc., as well as any qualifiers. 949 const Type *getUnqualifiedDesugaredType() const; 950 951 /// More type predicates useful for type checking/promotion 952 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 953 954 /// isSignedIntegerType - Return true if this is an integer type that is 955 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 956 /// an enum decl which has a signed representation, or a vector of signed 957 /// integer element type. 958 bool isSignedIntegerType() const; 959 960 /// isUnsignedIntegerType - Return true if this is an integer type that is 961 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 962 /// decl which has an unsigned representation, or a vector of unsigned integer 963 /// element type. 964 bool isUnsignedIntegerType() const; 965 966 /// isConstantSizeType - Return true if this is not a variable sized type, 967 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 968 /// incomplete types. 969 bool isConstantSizeType() const; 970 971 /// isSpecifierType - Returns true if this type can be represented by some 972 /// set of type specifiers. 973 bool isSpecifierType() const; 974 975 const char *getTypeClassName() const; 976 977 /// \brief Determine the linkage of this type. 978 virtual Linkage getLinkage() const; 979 980 QualType getCanonicalTypeInternal() const { 981 return CanonicalType; 982 } 983 CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h 984 void dump() const; 985 static bool classof(const Type *) { return true; } 986}; 987 988template <> inline const TypedefType *Type::getAs() const { 989 return dyn_cast<TypedefType>(this); 990} 991 992// We can do canonical leaf types faster, because we don't have to 993// worry about preserving child type decoration. 994#define TYPE(Class, Base) 995#define LEAF_TYPE(Class) \ 996template <> inline const Class##Type *Type::getAs() const { \ 997 return dyn_cast<Class##Type>(CanonicalType); \ 998} 999#include "clang/AST/TypeNodes.def" 1000 1001 1002/// BuiltinType - This class is used for builtin types like 'int'. Builtin 1003/// types are always canonical and have a literal name field. 1004class BuiltinType : public Type { 1005public: 1006 enum Kind { 1007 Void, 1008 1009 Bool, // This is bool and/or _Bool. 1010 Char_U, // This is 'char' for targets where char is unsigned. 1011 UChar, // This is explicitly qualified unsigned char. 1012 Char16, // This is 'char16_t' for C++. 1013 Char32, // This is 'char32_t' for C++. 1014 UShort, 1015 UInt, 1016 ULong, 1017 ULongLong, 1018 UInt128, // __uint128_t 1019 1020 Char_S, // This is 'char' for targets where char is signed. 1021 SChar, // This is explicitly qualified signed char. 1022 WChar, // This is 'wchar_t' for C++. 1023 Short, 1024 Int, 1025 Long, 1026 LongLong, 1027 Int128, // __int128_t 1028 1029 Float, Double, LongDouble, 1030 1031 NullPtr, // This is the type of C++0x 'nullptr'. 1032 1033 Overload, // This represents the type of an overloaded function declaration. 1034 Dependent, // This represents the type of a type-dependent expression. 1035 1036 UndeducedAuto, // In C++0x, this represents the type of an auto variable 1037 // that has not been deduced yet. 1038 ObjCId, // This represents the ObjC 'id' type. 1039 ObjCClass, // This represents the ObjC 'Class' type. 1040 ObjCSel // This represents the ObjC 'SEL' type. 1041 }; 1042private: 1043 Kind TypeKind; 1044public: 1045 BuiltinType(Kind K) 1046 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent)), 1047 TypeKind(K) {} 1048 1049 Kind getKind() const { return TypeKind; } 1050 const char *getName(const LangOptions &LO) const; 1051 1052 bool isSugared() const { return false; } 1053 QualType desugar() const { return QualType(this, 0); } 1054 1055 bool isInteger() const { 1056 return TypeKind >= Bool && TypeKind <= Int128; 1057 } 1058 1059 bool isSignedInteger() const { 1060 return TypeKind >= Char_S && TypeKind <= Int128; 1061 } 1062 1063 bool isUnsignedInteger() const { 1064 return TypeKind >= Bool && TypeKind <= UInt128; 1065 } 1066 1067 bool isFloatingPoint() const { 1068 return TypeKind >= Float && TypeKind <= LongDouble; 1069 } 1070 1071 virtual Linkage getLinkage() const; 1072 1073 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1074 static bool classof(const BuiltinType *) { return true; } 1075}; 1076 1077/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1078/// types (_Complex float etc) as well as the GCC integer complex extensions. 1079/// 1080class ComplexType : public Type, public llvm::FoldingSetNode { 1081 QualType ElementType; 1082 ComplexType(QualType Element, QualType CanonicalPtr) : 1083 Type(Complex, CanonicalPtr, Element->isDependentType()), 1084 ElementType(Element) { 1085 } 1086 friend class ASTContext; // ASTContext creates these. 1087public: 1088 QualType getElementType() const { return ElementType; } 1089 1090 bool isSugared() const { return false; } 1091 QualType desugar() const { return QualType(this, 0); } 1092 1093 void Profile(llvm::FoldingSetNodeID &ID) { 1094 Profile(ID, getElementType()); 1095 } 1096 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1097 ID.AddPointer(Element.getAsOpaquePtr()); 1098 } 1099 1100 virtual Linkage getLinkage() const; 1101 1102 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1103 static bool classof(const ComplexType *) { return true; } 1104}; 1105 1106/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1107/// 1108class PointerType : public Type, public llvm::FoldingSetNode { 1109 QualType PointeeType; 1110 1111 PointerType(QualType Pointee, QualType CanonicalPtr) : 1112 Type(Pointer, CanonicalPtr, Pointee->isDependentType()), PointeeType(Pointee) { 1113 } 1114 friend class ASTContext; // ASTContext creates these. 1115public: 1116 1117 QualType getPointeeType() const { return PointeeType; } 1118 1119 bool isSugared() const { return false; } 1120 QualType desugar() const { return QualType(this, 0); } 1121 1122 void Profile(llvm::FoldingSetNodeID &ID) { 1123 Profile(ID, getPointeeType()); 1124 } 1125 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1126 ID.AddPointer(Pointee.getAsOpaquePtr()); 1127 } 1128 1129 virtual Linkage getLinkage() const; 1130 1131 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1132 static bool classof(const PointerType *) { return true; } 1133}; 1134 1135/// BlockPointerType - pointer to a block type. 1136/// This type is to represent types syntactically represented as 1137/// "void (^)(int)", etc. Pointee is required to always be a function type. 1138/// 1139class BlockPointerType : public Type, public llvm::FoldingSetNode { 1140 QualType PointeeType; // Block is some kind of pointer type 1141 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1142 Type(BlockPointer, CanonicalCls, Pointee->isDependentType()), 1143 PointeeType(Pointee) { 1144 } 1145 friend class ASTContext; // ASTContext creates these. 1146public: 1147 1148 // Get the pointee type. Pointee is required to always be a function type. 1149 QualType getPointeeType() const { return PointeeType; } 1150 1151 bool isSugared() const { return false; } 1152 QualType desugar() const { return QualType(this, 0); } 1153 1154 void Profile(llvm::FoldingSetNodeID &ID) { 1155 Profile(ID, getPointeeType()); 1156 } 1157 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1158 ID.AddPointer(Pointee.getAsOpaquePtr()); 1159 } 1160 1161 virtual Linkage getLinkage() const; 1162 1163 static bool classof(const Type *T) { 1164 return T->getTypeClass() == BlockPointer; 1165 } 1166 static bool classof(const BlockPointerType *) { return true; } 1167}; 1168 1169/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 1170/// 1171class ReferenceType : public Type, public llvm::FoldingSetNode { 1172 QualType PointeeType; 1173 1174 /// True if the type was originally spelled with an lvalue sigil. 1175 /// This is never true of rvalue references but can also be false 1176 /// on lvalue references because of C++0x [dcl.typedef]p9, 1177 /// as follows: 1178 /// 1179 /// typedef int &ref; // lvalue, spelled lvalue 1180 /// typedef int &&rvref; // rvalue 1181 /// ref &a; // lvalue, inner ref, spelled lvalue 1182 /// ref &&a; // lvalue, inner ref 1183 /// rvref &a; // lvalue, inner ref, spelled lvalue 1184 /// rvref &&a; // rvalue, inner ref 1185 bool SpelledAsLValue; 1186 1187 /// True if the inner type is a reference type. This only happens 1188 /// in non-canonical forms. 1189 bool InnerRef; 1190 1191protected: 1192 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 1193 bool SpelledAsLValue) : 1194 Type(tc, CanonicalRef, Referencee->isDependentType()), 1195 PointeeType(Referencee), SpelledAsLValue(SpelledAsLValue), 1196 InnerRef(Referencee->isReferenceType()) { 1197 } 1198public: 1199 bool isSpelledAsLValue() const { return SpelledAsLValue; } 1200 bool isInnerRef() const { return InnerRef; } 1201 1202 QualType getPointeeTypeAsWritten() const { return PointeeType; } 1203 QualType getPointeeType() const { 1204 // FIXME: this might strip inner qualifiers; okay? 1205 const ReferenceType *T = this; 1206 while (T->InnerRef) 1207 T = T->PointeeType->getAs<ReferenceType>(); 1208 return T->PointeeType; 1209 } 1210 1211 void Profile(llvm::FoldingSetNodeID &ID) { 1212 Profile(ID, PointeeType, SpelledAsLValue); 1213 } 1214 static void Profile(llvm::FoldingSetNodeID &ID, 1215 QualType Referencee, 1216 bool SpelledAsLValue) { 1217 ID.AddPointer(Referencee.getAsOpaquePtr()); 1218 ID.AddBoolean(SpelledAsLValue); 1219 } 1220 1221 virtual Linkage getLinkage() const; 1222 1223 static bool classof(const Type *T) { 1224 return T->getTypeClass() == LValueReference || 1225 T->getTypeClass() == RValueReference; 1226 } 1227 static bool classof(const ReferenceType *) { return true; } 1228}; 1229 1230/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 1231/// 1232class LValueReferenceType : public ReferenceType { 1233 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 1234 bool SpelledAsLValue) : 1235 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 1236 {} 1237 friend class ASTContext; // ASTContext creates these 1238public: 1239 bool isSugared() const { return false; } 1240 QualType desugar() const { return QualType(this, 0); } 1241 1242 static bool classof(const Type *T) { 1243 return T->getTypeClass() == LValueReference; 1244 } 1245 static bool classof(const LValueReferenceType *) { return true; } 1246}; 1247 1248/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 1249/// 1250class RValueReferenceType : public ReferenceType { 1251 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 1252 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 1253 } 1254 friend class ASTContext; // ASTContext creates these 1255public: 1256 bool isSugared() const { return false; } 1257 QualType desugar() const { return QualType(this, 0); } 1258 1259 static bool classof(const Type *T) { 1260 return T->getTypeClass() == RValueReference; 1261 } 1262 static bool classof(const RValueReferenceType *) { return true; } 1263}; 1264 1265/// MemberPointerType - C++ 8.3.3 - Pointers to members 1266/// 1267class MemberPointerType : public Type, public llvm::FoldingSetNode { 1268 QualType PointeeType; 1269 /// The class of which the pointee is a member. Must ultimately be a 1270 /// RecordType, but could be a typedef or a template parameter too. 1271 const Type *Class; 1272 1273 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 1274 Type(MemberPointer, CanonicalPtr, 1275 Cls->isDependentType() || Pointee->isDependentType()), 1276 PointeeType(Pointee), Class(Cls) { 1277 } 1278 friend class ASTContext; // ASTContext creates these. 1279public: 1280 1281 QualType getPointeeType() const { return PointeeType; } 1282 1283 const Type *getClass() const { return Class; } 1284 1285 bool isSugared() const { return false; } 1286 QualType desugar() const { return QualType(this, 0); } 1287 1288 void Profile(llvm::FoldingSetNodeID &ID) { 1289 Profile(ID, getPointeeType(), getClass()); 1290 } 1291 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 1292 const Type *Class) { 1293 ID.AddPointer(Pointee.getAsOpaquePtr()); 1294 ID.AddPointer(Class); 1295 } 1296 1297 virtual Linkage getLinkage() const; 1298 1299 static bool classof(const Type *T) { 1300 return T->getTypeClass() == MemberPointer; 1301 } 1302 static bool classof(const MemberPointerType *) { return true; } 1303}; 1304 1305/// ArrayType - C99 6.7.5.2 - Array Declarators. 1306/// 1307class ArrayType : public Type, public llvm::FoldingSetNode { 1308public: 1309 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 1310 /// an array with a static size (e.g. int X[static 4]), or an array 1311 /// with a star size (e.g. int X[*]). 1312 /// 'static' is only allowed on function parameters. 1313 enum ArraySizeModifier { 1314 Normal, Static, Star 1315 }; 1316private: 1317 /// ElementType - The element type of the array. 1318 QualType ElementType; 1319 1320 // NOTE: VC++ treats enums as signed, avoid using the ArraySizeModifier enum 1321 /// NOTE: These fields are packed into the bitfields space in the Type class. 1322 unsigned SizeModifier : 2; 1323 1324 /// IndexTypeQuals - Capture qualifiers in declarations like: 1325 /// 'int X[static restrict 4]'. For function parameters only. 1326 unsigned IndexTypeQuals : 3; 1327 1328protected: 1329 // C++ [temp.dep.type]p1: 1330 // A type is dependent if it is... 1331 // - an array type constructed from any dependent type or whose 1332 // size is specified by a constant expression that is 1333 // value-dependent, 1334 ArrayType(TypeClass tc, QualType et, QualType can, 1335 ArraySizeModifier sm, unsigned tq) 1336 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray), 1337 ElementType(et), SizeModifier(sm), IndexTypeQuals(tq) {} 1338 1339 friend class ASTContext; // ASTContext creates these. 1340public: 1341 QualType getElementType() const { return ElementType; } 1342 ArraySizeModifier getSizeModifier() const { 1343 return ArraySizeModifier(SizeModifier); 1344 } 1345 Qualifiers getIndexTypeQualifiers() const { 1346 return Qualifiers::fromCVRMask(IndexTypeQuals); 1347 } 1348 unsigned getIndexTypeCVRQualifiers() const { return IndexTypeQuals; } 1349 1350 virtual Linkage getLinkage() const; 1351 1352 static bool classof(const Type *T) { 1353 return T->getTypeClass() == ConstantArray || 1354 T->getTypeClass() == VariableArray || 1355 T->getTypeClass() == IncompleteArray || 1356 T->getTypeClass() == DependentSizedArray; 1357 } 1358 static bool classof(const ArrayType *) { return true; } 1359}; 1360 1361/// ConstantArrayType - This class represents the canonical version of 1362/// C arrays with a specified constant size. For example, the canonical 1363/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 1364/// type is 'int' and the size is 404. 1365class ConstantArrayType : public ArrayType { 1366 llvm::APInt Size; // Allows us to unique the type. 1367 1368 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 1369 ArraySizeModifier sm, unsigned tq) 1370 : ArrayType(ConstantArray, et, can, sm, tq), 1371 Size(size) {} 1372protected: 1373 ConstantArrayType(TypeClass tc, QualType et, QualType can, 1374 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 1375 : ArrayType(tc, et, can, sm, tq), Size(size) {} 1376 friend class ASTContext; // ASTContext creates these. 1377public: 1378 const llvm::APInt &getSize() const { return Size; } 1379 bool isSugared() const { return false; } 1380 QualType desugar() const { return QualType(this, 0); } 1381 1382 void Profile(llvm::FoldingSetNodeID &ID) { 1383 Profile(ID, getElementType(), getSize(), 1384 getSizeModifier(), getIndexTypeCVRQualifiers()); 1385 } 1386 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1387 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 1388 unsigned TypeQuals) { 1389 ID.AddPointer(ET.getAsOpaquePtr()); 1390 ID.AddInteger(ArraySize.getZExtValue()); 1391 ID.AddInteger(SizeMod); 1392 ID.AddInteger(TypeQuals); 1393 } 1394 static bool classof(const Type *T) { 1395 return T->getTypeClass() == ConstantArray; 1396 } 1397 static bool classof(const ConstantArrayType *) { return true; } 1398}; 1399 1400/// IncompleteArrayType - This class represents C arrays with an unspecified 1401/// size. For example 'int A[]' has an IncompleteArrayType where the element 1402/// type is 'int' and the size is unspecified. 1403class IncompleteArrayType : public ArrayType { 1404 1405 IncompleteArrayType(QualType et, QualType can, 1406 ArraySizeModifier sm, unsigned tq) 1407 : ArrayType(IncompleteArray, et, can, sm, tq) {} 1408 friend class ASTContext; // ASTContext creates these. 1409public: 1410 bool isSugared() const { return false; } 1411 QualType desugar() const { return QualType(this, 0); } 1412 1413 static bool classof(const Type *T) { 1414 return T->getTypeClass() == IncompleteArray; 1415 } 1416 static bool classof(const IncompleteArrayType *) { return true; } 1417 1418 friend class StmtIteratorBase; 1419 1420 void Profile(llvm::FoldingSetNodeID &ID) { 1421 Profile(ID, getElementType(), getSizeModifier(), 1422 getIndexTypeCVRQualifiers()); 1423 } 1424 1425 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1426 ArraySizeModifier SizeMod, unsigned TypeQuals) { 1427 ID.AddPointer(ET.getAsOpaquePtr()); 1428 ID.AddInteger(SizeMod); 1429 ID.AddInteger(TypeQuals); 1430 } 1431}; 1432 1433/// VariableArrayType - This class represents C arrays with a specified size 1434/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 1435/// Since the size expression is an arbitrary expression, we store it as such. 1436/// 1437/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 1438/// should not be: two lexically equivalent variable array types could mean 1439/// different things, for example, these variables do not have the same type 1440/// dynamically: 1441/// 1442/// void foo(int x) { 1443/// int Y[x]; 1444/// ++x; 1445/// int Z[x]; 1446/// } 1447/// 1448class VariableArrayType : public ArrayType { 1449 /// SizeExpr - An assignment expression. VLA's are only permitted within 1450 /// a function block. 1451 Stmt *SizeExpr; 1452 /// Brackets - The left and right array brackets. 1453 SourceRange Brackets; 1454 1455 VariableArrayType(QualType et, QualType can, Expr *e, 1456 ArraySizeModifier sm, unsigned tq, 1457 SourceRange brackets) 1458 : ArrayType(VariableArray, et, can, sm, tq), 1459 SizeExpr((Stmt*) e), Brackets(brackets) {} 1460 friend class ASTContext; // ASTContext creates these. 1461 virtual void Destroy(ASTContext& C); 1462 1463public: 1464 Expr *getSizeExpr() const { 1465 // We use C-style casts instead of cast<> here because we do not wish 1466 // to have a dependency of Type.h on Stmt.h/Expr.h. 1467 return (Expr*) SizeExpr; 1468 } 1469 SourceRange getBracketsRange() const { return Brackets; } 1470 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1471 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1472 1473 bool isSugared() const { return false; } 1474 QualType desugar() const { return QualType(this, 0); } 1475 1476 static bool classof(const Type *T) { 1477 return T->getTypeClass() == VariableArray; 1478 } 1479 static bool classof(const VariableArrayType *) { return true; } 1480 1481 friend class StmtIteratorBase; 1482 1483 void Profile(llvm::FoldingSetNodeID &ID) { 1484 assert(0 && "Cannnot unique VariableArrayTypes."); 1485 } 1486}; 1487 1488/// DependentSizedArrayType - This type represents an array type in 1489/// C++ whose size is a value-dependent expression. For example: 1490/// 1491/// \code 1492/// template<typename T, int Size> 1493/// class array { 1494/// T data[Size]; 1495/// }; 1496/// \endcode 1497/// 1498/// For these types, we won't actually know what the array bound is 1499/// until template instantiation occurs, at which point this will 1500/// become either a ConstantArrayType or a VariableArrayType. 1501class DependentSizedArrayType : public ArrayType { 1502 ASTContext &Context; 1503 1504 /// \brief An assignment expression that will instantiate to the 1505 /// size of the array. 1506 /// 1507 /// The expression itself might be NULL, in which case the array 1508 /// type will have its size deduced from an initializer. 1509 Stmt *SizeExpr; 1510 1511 /// Brackets - The left and right array brackets. 1512 SourceRange Brackets; 1513 1514 DependentSizedArrayType(ASTContext &Context, QualType et, QualType can, 1515 Expr *e, ArraySizeModifier sm, unsigned tq, 1516 SourceRange brackets) 1517 : ArrayType(DependentSizedArray, et, can, sm, tq), 1518 Context(Context), SizeExpr((Stmt*) e), Brackets(brackets) {} 1519 friend class ASTContext; // ASTContext creates these. 1520 virtual void Destroy(ASTContext& C); 1521 1522public: 1523 Expr *getSizeExpr() const { 1524 // We use C-style casts instead of cast<> here because we do not wish 1525 // to have a dependency of Type.h on Stmt.h/Expr.h. 1526 return (Expr*) SizeExpr; 1527 } 1528 SourceRange getBracketsRange() const { return Brackets; } 1529 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1530 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1531 1532 bool isSugared() const { return false; } 1533 QualType desugar() const { return QualType(this, 0); } 1534 1535 static bool classof(const Type *T) { 1536 return T->getTypeClass() == DependentSizedArray; 1537 } 1538 static bool classof(const DependentSizedArrayType *) { return true; } 1539 1540 friend class StmtIteratorBase; 1541 1542 1543 void Profile(llvm::FoldingSetNodeID &ID) { 1544 Profile(ID, Context, getElementType(), 1545 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 1546 } 1547 1548 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1549 QualType ET, ArraySizeModifier SizeMod, 1550 unsigned TypeQuals, Expr *E); 1551}; 1552 1553/// DependentSizedExtVectorType - This type represent an extended vector type 1554/// where either the type or size is dependent. For example: 1555/// @code 1556/// template<typename T, int Size> 1557/// class vector { 1558/// typedef T __attribute__((ext_vector_type(Size))) type; 1559/// } 1560/// @endcode 1561class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 1562 ASTContext &Context; 1563 Expr *SizeExpr; 1564 /// ElementType - The element type of the array. 1565 QualType ElementType; 1566 SourceLocation loc; 1567 1568 DependentSizedExtVectorType(ASTContext &Context, QualType ElementType, 1569 QualType can, Expr *SizeExpr, SourceLocation loc) 1570 : Type (DependentSizedExtVector, can, true), 1571 Context(Context), SizeExpr(SizeExpr), ElementType(ElementType), 1572 loc(loc) {} 1573 friend class ASTContext; 1574 virtual void Destroy(ASTContext& C); 1575 1576public: 1577 Expr *getSizeExpr() const { return SizeExpr; } 1578 QualType getElementType() const { return ElementType; } 1579 SourceLocation getAttributeLoc() const { return loc; } 1580 1581 bool isSugared() const { return false; } 1582 QualType desugar() const { return QualType(this, 0); } 1583 1584 static bool classof(const Type *T) { 1585 return T->getTypeClass() == DependentSizedExtVector; 1586 } 1587 static bool classof(const DependentSizedExtVectorType *) { return true; } 1588 1589 void Profile(llvm::FoldingSetNodeID &ID) { 1590 Profile(ID, Context, getElementType(), getSizeExpr()); 1591 } 1592 1593 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1594 QualType ElementType, Expr *SizeExpr); 1595}; 1596 1597 1598/// VectorType - GCC generic vector type. This type is created using 1599/// __attribute__((vector_size(n)), where "n" specifies the vector size in 1600/// bytes; or from an Altivec __vector or vector declaration. 1601/// Since the constructor takes the number of vector elements, the 1602/// client is responsible for converting the size into the number of elements. 1603class VectorType : public Type, public llvm::FoldingSetNode { 1604protected: 1605 /// ElementType - The element type of the vector. 1606 QualType ElementType; 1607 1608 /// NumElements - The number of elements in the vector. 1609 unsigned NumElements; 1610 1611 /// AltiVec - True if this is for an Altivec vector. 1612 bool AltiVec; 1613 1614 /// Pixel - True if this is for an Altivec vector pixel. 1615 bool Pixel; 1616 1617 VectorType(QualType vecType, unsigned nElements, QualType canonType, 1618 bool isAltiVec, bool isPixel) : 1619 Type(Vector, canonType, vecType->isDependentType()), 1620 ElementType(vecType), NumElements(nElements), 1621 AltiVec(isAltiVec), Pixel(isPixel) {} 1622 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 1623 QualType canonType, bool isAltiVec, bool isPixel) 1624 : Type(tc, canonType, vecType->isDependentType()), ElementType(vecType), 1625 NumElements(nElements), AltiVec(isAltiVec), Pixel(isPixel) {} 1626 friend class ASTContext; // ASTContext creates these. 1627public: 1628 1629 QualType getElementType() const { return ElementType; } 1630 unsigned getNumElements() const { return NumElements; } 1631 1632 bool isSugared() const { return false; } 1633 QualType desugar() const { return QualType(this, 0); } 1634 1635 bool isAltiVec() const { return AltiVec; } 1636 1637 bool isPixel() const { return Pixel; } 1638 1639 void Profile(llvm::FoldingSetNodeID &ID) { 1640 Profile(ID, getElementType(), getNumElements(), getTypeClass(), 1641 AltiVec, Pixel); 1642 } 1643 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 1644 unsigned NumElements, TypeClass TypeClass, 1645 bool isAltiVec, bool isPixel) { 1646 ID.AddPointer(ElementType.getAsOpaquePtr()); 1647 ID.AddInteger(NumElements); 1648 ID.AddInteger(TypeClass); 1649 ID.AddBoolean(isAltiVec); 1650 ID.AddBoolean(isPixel); 1651 } 1652 1653 virtual Linkage getLinkage() const; 1654 1655 static bool classof(const Type *T) { 1656 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 1657 } 1658 static bool classof(const VectorType *) { return true; } 1659}; 1660 1661/// ExtVectorType - Extended vector type. This type is created using 1662/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 1663/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 1664/// class enables syntactic extensions, like Vector Components for accessing 1665/// points, colors, and textures (modeled after OpenGL Shading Language). 1666class ExtVectorType : public VectorType { 1667 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 1668 VectorType(ExtVector, vecType, nElements, canonType, false, false) {} 1669 friend class ASTContext; // ASTContext creates these. 1670public: 1671 static int getPointAccessorIdx(char c) { 1672 switch (c) { 1673 default: return -1; 1674 case 'x': return 0; 1675 case 'y': return 1; 1676 case 'z': return 2; 1677 case 'w': return 3; 1678 } 1679 } 1680 static int getNumericAccessorIdx(char c) { 1681 switch (c) { 1682 default: return -1; 1683 case '0': return 0; 1684 case '1': return 1; 1685 case '2': return 2; 1686 case '3': return 3; 1687 case '4': return 4; 1688 case '5': return 5; 1689 case '6': return 6; 1690 case '7': return 7; 1691 case '8': return 8; 1692 case '9': return 9; 1693 case 'A': 1694 case 'a': return 10; 1695 case 'B': 1696 case 'b': return 11; 1697 case 'C': 1698 case 'c': return 12; 1699 case 'D': 1700 case 'd': return 13; 1701 case 'E': 1702 case 'e': return 14; 1703 case 'F': 1704 case 'f': return 15; 1705 } 1706 } 1707 1708 static int getAccessorIdx(char c) { 1709 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 1710 return getNumericAccessorIdx(c); 1711 } 1712 1713 bool isAccessorWithinNumElements(char c) const { 1714 if (int idx = getAccessorIdx(c)+1) 1715 return unsigned(idx-1) < NumElements; 1716 return false; 1717 } 1718 bool isSugared() const { return false; } 1719 QualType desugar() const { return QualType(this, 0); } 1720 1721 static bool classof(const Type *T) { 1722 return T->getTypeClass() == ExtVector; 1723 } 1724 static bool classof(const ExtVectorType *) { return true; } 1725}; 1726 1727/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 1728/// class of FunctionNoProtoType and FunctionProtoType. 1729/// 1730class FunctionType : public Type { 1731 /// SubClassData - This field is owned by the subclass, put here to pack 1732 /// tightly with the ivars in Type. 1733 bool SubClassData : 1; 1734 1735 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1736 /// other bitfields. 1737 /// The qualifiers are part of FunctionProtoType because... 1738 /// 1739 /// C++ 8.3.5p4: The return type, the parameter type list and the 1740 /// cv-qualifier-seq, [...], are part of the function type. 1741 /// 1742 unsigned TypeQuals : 3; 1743 1744 /// NoReturn - Indicates if the function type is attribute noreturn. 1745 unsigned NoReturn : 1; 1746 1747 /// RegParm - How many arguments to pass inreg. 1748 unsigned RegParm : 3; 1749 1750 /// CallConv - The calling convention used by the function. 1751 unsigned CallConv : 2; 1752 1753 // The type returned by the function. 1754 QualType ResultType; 1755 1756 public: 1757 // This class is used for passing arround the information needed to 1758 // construct a call. It is not actually used for storage, just for 1759 // factoring together common arguments. 1760 // If you add a field (say Foo), other than the obvious places (both, constructors, 1761 // compile failures), what you need to update is 1762 // * Operetor== 1763 // * getFoo 1764 // * withFoo 1765 // * functionType. Add Foo, getFoo. 1766 // * ASTContext::getFooType 1767 // * ASTContext::mergeFunctionTypes 1768 // * FunctionNoProtoType::Profile 1769 // * FunctionProtoType::Profile 1770 // * TypePrinter::PrintFunctionProto 1771 // * PCH read and write 1772 // * Codegen 1773 1774 class ExtInfo { 1775 public: 1776 // Constructor with no defaults. Use this when you know that you 1777 // have all the elements (when reading a PCH file for example). 1778 ExtInfo(bool noReturn, unsigned regParm, CallingConv cc) : 1779 NoReturn(noReturn), RegParm(regParm), CC(cc) {} 1780 1781 // Constructor with all defaults. Use when for example creating a 1782 // function know to use defaults. 1783 ExtInfo() : NoReturn(false), RegParm(0), CC(CC_Default) {} 1784 1785 bool getNoReturn() const { return NoReturn; } 1786 unsigned getRegParm() const { return RegParm; } 1787 CallingConv getCC() const { return CC; } 1788 1789 bool operator==(const ExtInfo &Other) const { 1790 return getNoReturn() == Other.getNoReturn() && 1791 getRegParm() == Other.getRegParm() && 1792 getCC() == Other.getCC(); 1793 } 1794 bool operator!=(const ExtInfo &Other) const { 1795 return !(*this == Other); 1796 } 1797 1798 // Note that we don't have setters. That is by design, use 1799 // the following with methods instead of mutating these objects. 1800 1801 ExtInfo withNoReturn(bool noReturn) const { 1802 return ExtInfo(noReturn, getRegParm(), getCC()); 1803 } 1804 1805 ExtInfo withRegParm(unsigned RegParm) const { 1806 return ExtInfo(getNoReturn(), RegParm, getCC()); 1807 } 1808 1809 ExtInfo withCallingConv(CallingConv cc) const { 1810 return ExtInfo(getNoReturn(), getRegParm(), cc); 1811 } 1812 1813 private: 1814 // True if we have __attribute__((noreturn)) 1815 bool NoReturn; 1816 // The value passed to __attribute__((regparm(x))) 1817 unsigned RegParm; 1818 // The calling convention as specified via 1819 // __attribute__((cdecl|stdcall||fastcall)) 1820 CallingConv CC; 1821 }; 1822 1823protected: 1824 FunctionType(TypeClass tc, QualType res, bool SubclassInfo, 1825 unsigned typeQuals, QualType Canonical, bool Dependent, 1826 const ExtInfo &Info) 1827 : Type(tc, Canonical, Dependent), 1828 SubClassData(SubclassInfo), TypeQuals(typeQuals), 1829 NoReturn(Info.getNoReturn()), 1830 RegParm(Info.getRegParm()), CallConv(Info.getCC()), ResultType(res) {} 1831 bool getSubClassData() const { return SubClassData; } 1832 unsigned getTypeQuals() const { return TypeQuals; } 1833public: 1834 1835 QualType getResultType() const { return ResultType; } 1836 unsigned getRegParmType() const { return RegParm; } 1837 bool getNoReturnAttr() const { return NoReturn; } 1838 CallingConv getCallConv() const { return (CallingConv)CallConv; } 1839 ExtInfo getExtInfo() const { 1840 return ExtInfo(NoReturn, RegParm, (CallingConv)CallConv); 1841 } 1842 1843 static llvm::StringRef getNameForCallConv(CallingConv CC); 1844 1845 static bool classof(const Type *T) { 1846 return T->getTypeClass() == FunctionNoProto || 1847 T->getTypeClass() == FunctionProto; 1848 } 1849 static bool classof(const FunctionType *) { return true; } 1850}; 1851 1852/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 1853/// no information available about its arguments. 1854class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 1855 FunctionNoProtoType(QualType Result, QualType Canonical, 1856 const ExtInfo &Info) 1857 : FunctionType(FunctionNoProto, Result, false, 0, Canonical, 1858 /*Dependent=*/false, Info) {} 1859 friend class ASTContext; // ASTContext creates these. 1860public: 1861 // No additional state past what FunctionType provides. 1862 1863 bool isSugared() const { return false; } 1864 QualType desugar() const { return QualType(this, 0); } 1865 1866 void Profile(llvm::FoldingSetNodeID &ID) { 1867 Profile(ID, getResultType(), getExtInfo()); 1868 } 1869 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 1870 const ExtInfo &Info) { 1871 ID.AddInteger(Info.getCC()); 1872 ID.AddInteger(Info.getRegParm()); 1873 ID.AddInteger(Info.getNoReturn()); 1874 ID.AddPointer(ResultType.getAsOpaquePtr()); 1875 } 1876 1877 virtual Linkage getLinkage() const; 1878 1879 static bool classof(const Type *T) { 1880 return T->getTypeClass() == FunctionNoProto; 1881 } 1882 static bool classof(const FunctionNoProtoType *) { return true; } 1883}; 1884 1885/// FunctionProtoType - Represents a prototype with argument type info, e.g. 1886/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 1887/// arguments, not as having a single void argument. Such a type can have an 1888/// exception specification, but this specification is not part of the canonical 1889/// type. 1890class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 1891 /// hasAnyDependentType - Determine whether there are any dependent 1892 /// types within the arguments passed in. 1893 static bool hasAnyDependentType(const QualType *ArgArray, unsigned numArgs) { 1894 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 1895 if (ArgArray[Idx]->isDependentType()) 1896 return true; 1897 1898 return false; 1899 } 1900 1901 FunctionProtoType(QualType Result, const QualType *ArgArray, unsigned numArgs, 1902 bool isVariadic, unsigned typeQuals, bool hasExs, 1903 bool hasAnyExs, const QualType *ExArray, 1904 unsigned numExs, QualType Canonical, 1905 const ExtInfo &Info) 1906 : FunctionType(FunctionProto, Result, isVariadic, typeQuals, Canonical, 1907 (Result->isDependentType() || 1908 hasAnyDependentType(ArgArray, numArgs)), 1909 Info), 1910 NumArgs(numArgs), NumExceptions(numExs), HasExceptionSpec(hasExs), 1911 AnyExceptionSpec(hasAnyExs) { 1912 // Fill in the trailing argument array. 1913 QualType *ArgInfo = reinterpret_cast<QualType*>(this+1); 1914 for (unsigned i = 0; i != numArgs; ++i) 1915 ArgInfo[i] = ArgArray[i]; 1916 // Fill in the exception array. 1917 QualType *Ex = ArgInfo + numArgs; 1918 for (unsigned i = 0; i != numExs; ++i) 1919 Ex[i] = ExArray[i]; 1920 } 1921 1922 /// NumArgs - The number of arguments this function has, not counting '...'. 1923 unsigned NumArgs : 20; 1924 1925 /// NumExceptions - The number of types in the exception spec, if any. 1926 unsigned NumExceptions : 10; 1927 1928 /// HasExceptionSpec - Whether this function has an exception spec at all. 1929 bool HasExceptionSpec : 1; 1930 1931 /// AnyExceptionSpec - Whether this function has a throw(...) spec. 1932 bool AnyExceptionSpec : 1; 1933 1934 /// ArgInfo - There is an variable size array after the class in memory that 1935 /// holds the argument types. 1936 1937 /// Exceptions - There is another variable size array after ArgInfo that 1938 /// holds the exception types. 1939 1940 friend class ASTContext; // ASTContext creates these. 1941 1942public: 1943 unsigned getNumArgs() const { return NumArgs; } 1944 QualType getArgType(unsigned i) const { 1945 assert(i < NumArgs && "Invalid argument number!"); 1946 return arg_type_begin()[i]; 1947 } 1948 1949 bool hasExceptionSpec() const { return HasExceptionSpec; } 1950 bool hasAnyExceptionSpec() const { return AnyExceptionSpec; } 1951 unsigned getNumExceptions() const { return NumExceptions; } 1952 QualType getExceptionType(unsigned i) const { 1953 assert(i < NumExceptions && "Invalid exception number!"); 1954 return exception_begin()[i]; 1955 } 1956 bool hasEmptyExceptionSpec() const { 1957 return hasExceptionSpec() && !hasAnyExceptionSpec() && 1958 getNumExceptions() == 0; 1959 } 1960 1961 bool isVariadic() const { return getSubClassData(); } 1962 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 1963 1964 typedef const QualType *arg_type_iterator; 1965 arg_type_iterator arg_type_begin() const { 1966 return reinterpret_cast<const QualType *>(this+1); 1967 } 1968 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 1969 1970 typedef const QualType *exception_iterator; 1971 exception_iterator exception_begin() const { 1972 // exceptions begin where arguments end 1973 return arg_type_end(); 1974 } 1975 exception_iterator exception_end() const { 1976 return exception_begin() + NumExceptions; 1977 } 1978 1979 bool isSugared() const { return false; } 1980 QualType desugar() const { return QualType(this, 0); } 1981 1982 virtual Linkage getLinkage() const; 1983 1984 static bool classof(const Type *T) { 1985 return T->getTypeClass() == FunctionProto; 1986 } 1987 static bool classof(const FunctionProtoType *) { return true; } 1988 1989 void Profile(llvm::FoldingSetNodeID &ID); 1990 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 1991 arg_type_iterator ArgTys, unsigned NumArgs, 1992 bool isVariadic, unsigned TypeQuals, 1993 bool hasExceptionSpec, bool anyExceptionSpec, 1994 unsigned NumExceptions, exception_iterator Exs, 1995 const ExtInfo &ExtInfo); 1996}; 1997 1998 1999/// \brief Represents the dependent type named by a dependently-scoped 2000/// typename using declaration, e.g. 2001/// using typename Base<T>::foo; 2002/// Template instantiation turns these into the underlying type. 2003class UnresolvedUsingType : public Type { 2004 UnresolvedUsingTypenameDecl *Decl; 2005 2006 UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) 2007 : Type(UnresolvedUsing, QualType(), true), 2008 Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} 2009 friend class ASTContext; // ASTContext creates these. 2010public: 2011 2012 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 2013 2014 bool isSugared() const { return false; } 2015 QualType desugar() const { return QualType(this, 0); } 2016 2017 static bool classof(const Type *T) { 2018 return T->getTypeClass() == UnresolvedUsing; 2019 } 2020 static bool classof(const UnresolvedUsingType *) { return true; } 2021 2022 void Profile(llvm::FoldingSetNodeID &ID) { 2023 return Profile(ID, Decl); 2024 } 2025 static void Profile(llvm::FoldingSetNodeID &ID, 2026 UnresolvedUsingTypenameDecl *D) { 2027 ID.AddPointer(D); 2028 } 2029}; 2030 2031 2032class TypedefType : public Type { 2033 TypedefDecl *Decl; 2034protected: 2035 TypedefType(TypeClass tc, const TypedefDecl *D, QualType can) 2036 : Type(tc, can, can->isDependentType()), 2037 Decl(const_cast<TypedefDecl*>(D)) { 2038 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2039 } 2040 friend class ASTContext; // ASTContext creates these. 2041public: 2042 2043 TypedefDecl *getDecl() const { return Decl; } 2044 2045 /// LookThroughTypedefs - Return the ultimate type this typedef corresponds to 2046 /// potentially looking through *all* consecutive typedefs. This returns the 2047 /// sum of the type qualifiers, so if you have: 2048 /// typedef const int A; 2049 /// typedef volatile A B; 2050 /// looking through the typedefs for B will give you "const volatile A". 2051 QualType LookThroughTypedefs() const; 2052 2053 bool isSugared() const { return true; } 2054 QualType desugar() const; 2055 2056 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 2057 static bool classof(const TypedefType *) { return true; } 2058}; 2059 2060/// TypeOfExprType (GCC extension). 2061class TypeOfExprType : public Type { 2062 Expr *TOExpr; 2063 2064protected: 2065 TypeOfExprType(Expr *E, QualType can = QualType()); 2066 friend class ASTContext; // ASTContext creates these. 2067public: 2068 Expr *getUnderlyingExpr() const { return TOExpr; } 2069 2070 /// \brief Remove a single level of sugar. 2071 QualType desugar() const; 2072 2073 /// \brief Returns whether this type directly provides sugar. 2074 bool isSugared() const { return true; } 2075 2076 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 2077 static bool classof(const TypeOfExprType *) { return true; } 2078}; 2079 2080/// \brief Internal representation of canonical, dependent 2081/// typeof(expr) types. 2082/// 2083/// This class is used internally by the ASTContext to manage 2084/// canonical, dependent types, only. Clients will only see instances 2085/// of this class via TypeOfExprType nodes. 2086class DependentTypeOfExprType 2087 : public TypeOfExprType, public llvm::FoldingSetNode { 2088 ASTContext &Context; 2089 2090public: 2091 DependentTypeOfExprType(ASTContext &Context, Expr *E) 2092 : TypeOfExprType(E), Context(Context) { } 2093 2094 bool isSugared() const { return false; } 2095 QualType desugar() const { return QualType(this, 0); } 2096 2097 void Profile(llvm::FoldingSetNodeID &ID) { 2098 Profile(ID, Context, getUnderlyingExpr()); 2099 } 2100 2101 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2102 Expr *E); 2103}; 2104 2105/// TypeOfType (GCC extension). 2106class TypeOfType : public Type { 2107 QualType TOType; 2108 TypeOfType(QualType T, QualType can) 2109 : Type(TypeOf, can, T->isDependentType()), TOType(T) { 2110 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2111 } 2112 friend class ASTContext; // ASTContext creates these. 2113public: 2114 QualType getUnderlyingType() const { return TOType; } 2115 2116 /// \brief Remove a single level of sugar. 2117 QualType desugar() const { return getUnderlyingType(); } 2118 2119 /// \brief Returns whether this type directly provides sugar. 2120 bool isSugared() const { return true; } 2121 2122 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 2123 static bool classof(const TypeOfType *) { return true; } 2124}; 2125 2126/// DecltypeType (C++0x) 2127class DecltypeType : public Type { 2128 Expr *E; 2129 2130 // FIXME: We could get rid of UnderlyingType if we wanted to: We would have to 2131 // Move getDesugaredType to ASTContext so that it can call getDecltypeForExpr 2132 // from it. 2133 QualType UnderlyingType; 2134 2135protected: 2136 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 2137 friend class ASTContext; // ASTContext creates these. 2138public: 2139 Expr *getUnderlyingExpr() const { return E; } 2140 QualType getUnderlyingType() const { return UnderlyingType; } 2141 2142 /// \brief Remove a single level of sugar. 2143 QualType desugar() const { return getUnderlyingType(); } 2144 2145 /// \brief Returns whether this type directly provides sugar. 2146 bool isSugared() const { return !isDependentType(); } 2147 2148 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 2149 static bool classof(const DecltypeType *) { return true; } 2150}; 2151 2152/// \brief Internal representation of canonical, dependent 2153/// decltype(expr) types. 2154/// 2155/// This class is used internally by the ASTContext to manage 2156/// canonical, dependent types, only. Clients will only see instances 2157/// of this class via DecltypeType nodes. 2158class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 2159 ASTContext &Context; 2160 2161public: 2162 DependentDecltypeType(ASTContext &Context, Expr *E); 2163 2164 bool isSugared() const { return false; } 2165 QualType desugar() const { return QualType(this, 0); } 2166 2167 void Profile(llvm::FoldingSetNodeID &ID) { 2168 Profile(ID, Context, getUnderlyingExpr()); 2169 } 2170 2171 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2172 Expr *E); 2173}; 2174 2175class TagType : public Type { 2176 /// Stores the TagDecl associated with this type. The decl will 2177 /// point to the TagDecl that actually defines the entity (or is a 2178 /// definition in progress), if there is such a definition. The 2179 /// single-bit value will be non-zero when this tag is in the 2180 /// process of being defined. 2181 mutable llvm::PointerIntPair<TagDecl *, 1> decl; 2182 friend class ASTContext; 2183 friend class TagDecl; 2184 2185protected: 2186 TagType(TypeClass TC, const TagDecl *D, QualType can); 2187 2188public: 2189 TagDecl *getDecl() const { return decl.getPointer(); } 2190 2191 /// @brief Determines whether this type is in the process of being 2192 /// defined. 2193 bool isBeingDefined() const { return decl.getInt(); } 2194 void setBeingDefined(bool Def) const { decl.setInt(Def? 1 : 0); } 2195 2196 virtual Linkage getLinkage() const; 2197 2198 static bool classof(const Type *T) { 2199 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 2200 } 2201 static bool classof(const TagType *) { return true; } 2202 static bool classof(const RecordType *) { return true; } 2203 static bool classof(const EnumType *) { return true; } 2204}; 2205 2206/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 2207/// to detect TagType objects of structs/unions/classes. 2208class RecordType : public TagType { 2209protected: 2210 explicit RecordType(const RecordDecl *D) 2211 : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2212 explicit RecordType(TypeClass TC, RecordDecl *D) 2213 : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2214 friend class ASTContext; // ASTContext creates these. 2215public: 2216 2217 RecordDecl *getDecl() const { 2218 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 2219 } 2220 2221 // FIXME: This predicate is a helper to QualType/Type. It needs to 2222 // recursively check all fields for const-ness. If any field is declared 2223 // const, it needs to return false. 2224 bool hasConstFields() const { return false; } 2225 2226 // FIXME: RecordType needs to check when it is created that all fields are in 2227 // the same address space, and return that. 2228 unsigned getAddressSpace() const { return 0; } 2229 2230 bool isSugared() const { return false; } 2231 QualType desugar() const { return QualType(this, 0); } 2232 2233 static bool classof(const TagType *T); 2234 static bool classof(const Type *T) { 2235 return isa<TagType>(T) && classof(cast<TagType>(T)); 2236 } 2237 static bool classof(const RecordType *) { return true; } 2238}; 2239 2240/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 2241/// to detect TagType objects of enums. 2242class EnumType : public TagType { 2243 explicit EnumType(const EnumDecl *D) 2244 : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2245 friend class ASTContext; // ASTContext creates these. 2246public: 2247 2248 EnumDecl *getDecl() const { 2249 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 2250 } 2251 2252 bool isSugared() const { return false; } 2253 QualType desugar() const { return QualType(this, 0); } 2254 2255 static bool classof(const TagType *T); 2256 static bool classof(const Type *T) { 2257 return isa<TagType>(T) && classof(cast<TagType>(T)); 2258 } 2259 static bool classof(const EnumType *) { return true; } 2260}; 2261 2262/// ElaboratedType - A non-canonical type used to represents uses of 2263/// elaborated type specifiers in C++. For example: 2264/// 2265/// void foo(union MyUnion); 2266/// ^^^^^^^^^^^^^ 2267/// 2268/// At the moment, for efficiency we do not create elaborated types in 2269/// C, since outside of typedefs all references to structs would 2270/// necessarily be elaborated. 2271class ElaboratedType : public Type, public llvm::FoldingSetNode { 2272public: 2273 enum TagKind { 2274 TK_struct, 2275 TK_union, 2276 TK_class, 2277 TK_enum 2278 }; 2279 2280private: 2281 /// The tag that was used in this elaborated type specifier. 2282 TagKind Tag; 2283 2284 /// The underlying type. 2285 QualType UnderlyingType; 2286 2287 explicit ElaboratedType(QualType Ty, TagKind Tag, QualType Canon) 2288 : Type(Elaborated, Canon, Canon->isDependentType()), 2289 Tag(Tag), UnderlyingType(Ty) { } 2290 friend class ASTContext; // ASTContext creates these. 2291 2292public: 2293 TagKind getTagKind() const { return Tag; } 2294 QualType getUnderlyingType() const { return UnderlyingType; } 2295 2296 /// \brief Remove a single level of sugar. 2297 QualType desugar() const { return getUnderlyingType(); } 2298 2299 /// \brief Returns whether this type directly provides sugar. 2300 bool isSugared() const { return true; } 2301 2302 static const char *getNameForTagKind(TagKind Kind) { 2303 switch (Kind) { 2304 default: assert(0 && "Unknown TagKind!"); 2305 case TK_struct: return "struct"; 2306 case TK_union: return "union"; 2307 case TK_class: return "class"; 2308 case TK_enum: return "enum"; 2309 } 2310 } 2311 2312 void Profile(llvm::FoldingSetNodeID &ID) { 2313 Profile(ID, getUnderlyingType(), getTagKind()); 2314 } 2315 static void Profile(llvm::FoldingSetNodeID &ID, QualType T, TagKind Tag) { 2316 ID.AddPointer(T.getAsOpaquePtr()); 2317 ID.AddInteger(Tag); 2318 } 2319 2320 static bool classof(const ElaboratedType*) { return true; } 2321 static bool classof(const Type *T) { return T->getTypeClass() == Elaborated; } 2322}; 2323 2324class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2325 unsigned Depth : 15; 2326 unsigned Index : 16; 2327 unsigned ParameterPack : 1; 2328 IdentifierInfo *Name; 2329 2330 TemplateTypeParmType(unsigned D, unsigned I, bool PP, IdentifierInfo *N, 2331 QualType Canon) 2332 : Type(TemplateTypeParm, Canon, /*Dependent=*/true), 2333 Depth(D), Index(I), ParameterPack(PP), Name(N) { } 2334 2335 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 2336 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true), 2337 Depth(D), Index(I), ParameterPack(PP), Name(0) { } 2338 2339 friend class ASTContext; // ASTContext creates these 2340 2341public: 2342 unsigned getDepth() const { return Depth; } 2343 unsigned getIndex() const { return Index; } 2344 bool isParameterPack() const { return ParameterPack; } 2345 IdentifierInfo *getName() const { return Name; } 2346 2347 bool isSugared() const { return false; } 2348 QualType desugar() const { return QualType(this, 0); } 2349 2350 void Profile(llvm::FoldingSetNodeID &ID) { 2351 Profile(ID, Depth, Index, ParameterPack, Name); 2352 } 2353 2354 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 2355 unsigned Index, bool ParameterPack, 2356 IdentifierInfo *Name) { 2357 ID.AddInteger(Depth); 2358 ID.AddInteger(Index); 2359 ID.AddBoolean(ParameterPack); 2360 ID.AddPointer(Name); 2361 } 2362 2363 static bool classof(const Type *T) { 2364 return T->getTypeClass() == TemplateTypeParm; 2365 } 2366 static bool classof(const TemplateTypeParmType *T) { return true; } 2367}; 2368 2369/// \brief Represents the result of substituting a type for a template 2370/// type parameter. 2371/// 2372/// Within an instantiated template, all template type parameters have 2373/// been replaced with these. They are used solely to record that a 2374/// type was originally written as a template type parameter; 2375/// therefore they are never canonical. 2376class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2377 // The original type parameter. 2378 const TemplateTypeParmType *Replaced; 2379 2380 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 2381 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType()), 2382 Replaced(Param) { } 2383 2384 friend class ASTContext; 2385 2386public: 2387 IdentifierInfo *getName() const { return Replaced->getName(); } 2388 2389 /// Gets the template parameter that was substituted for. 2390 const TemplateTypeParmType *getReplacedParameter() const { 2391 return Replaced; 2392 } 2393 2394 /// Gets the type that was substituted for the template 2395 /// parameter. 2396 QualType getReplacementType() const { 2397 return getCanonicalTypeInternal(); 2398 } 2399 2400 bool isSugared() const { return true; } 2401 QualType desugar() const { return getReplacementType(); } 2402 2403 void Profile(llvm::FoldingSetNodeID &ID) { 2404 Profile(ID, getReplacedParameter(), getReplacementType()); 2405 } 2406 static void Profile(llvm::FoldingSetNodeID &ID, 2407 const TemplateTypeParmType *Replaced, 2408 QualType Replacement) { 2409 ID.AddPointer(Replaced); 2410 ID.AddPointer(Replacement.getAsOpaquePtr()); 2411 } 2412 2413 static bool classof(const Type *T) { 2414 return T->getTypeClass() == SubstTemplateTypeParm; 2415 } 2416 static bool classof(const SubstTemplateTypeParmType *T) { return true; } 2417}; 2418 2419/// \brief Represents the type of a template specialization as written 2420/// in the source code. 2421/// 2422/// Template specialization types represent the syntactic form of a 2423/// template-id that refers to a type, e.g., @c vector<int>. Some 2424/// template specialization types are syntactic sugar, whose canonical 2425/// type will point to some other type node that represents the 2426/// instantiation or class template specialization. For example, a 2427/// class template specialization type of @c vector<int> will refer to 2428/// a tag type for the instantiation 2429/// @c std::vector<int, std::allocator<int>>. 2430/// 2431/// Other template specialization types, for which the template name 2432/// is dependent, may be canonical types. These types are always 2433/// dependent. 2434class TemplateSpecializationType 2435 : public Type, public llvm::FoldingSetNode { 2436 2437 // FIXME: Currently needed for profiling expressions; can we avoid this? 2438 ASTContext &Context; 2439 2440 /// \brief The name of the template being specialized. 2441 TemplateName Template; 2442 2443 /// \brief - The number of template arguments named in this class 2444 /// template specialization. 2445 unsigned NumArgs; 2446 2447 TemplateSpecializationType(ASTContext &Context, 2448 TemplateName T, 2449 const TemplateArgument *Args, 2450 unsigned NumArgs, QualType Canon); 2451 2452 virtual void Destroy(ASTContext& C); 2453 2454 friend class ASTContext; // ASTContext creates these 2455 2456public: 2457 /// \brief Determine whether any of the given template arguments are 2458 /// dependent. 2459 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 2460 unsigned NumArgs); 2461 2462 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 2463 unsigned NumArgs); 2464 2465 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &); 2466 2467 /// \brief Print a template argument list, including the '<' and '>' 2468 /// enclosing the template arguments. 2469 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 2470 unsigned NumArgs, 2471 const PrintingPolicy &Policy); 2472 2473 static std::string PrintTemplateArgumentList(const TemplateArgumentLoc *Args, 2474 unsigned NumArgs, 2475 const PrintingPolicy &Policy); 2476 2477 static std::string PrintTemplateArgumentList(const TemplateArgumentListInfo &, 2478 const PrintingPolicy &Policy); 2479 2480 typedef const TemplateArgument * iterator; 2481 2482 iterator begin() const { return getArgs(); } 2483 iterator end() const; 2484 2485 /// \brief Retrieve the name of the template that we are specializing. 2486 TemplateName getTemplateName() const { return Template; } 2487 2488 /// \brief Retrieve the template arguments. 2489 const TemplateArgument *getArgs() const { 2490 return reinterpret_cast<const TemplateArgument *>(this + 1); 2491 } 2492 2493 /// \brief Retrieve the number of template arguments. 2494 unsigned getNumArgs() const { return NumArgs; } 2495 2496 /// \brief Retrieve a specific template argument as a type. 2497 /// \precondition @c isArgType(Arg) 2498 const TemplateArgument &getArg(unsigned Idx) const; 2499 2500 bool isSugared() const { return !isDependentType(); } 2501 QualType desugar() const { return getCanonicalTypeInternal(); } 2502 2503 void Profile(llvm::FoldingSetNodeID &ID) { 2504 Profile(ID, Template, getArgs(), NumArgs, Context); 2505 } 2506 2507 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 2508 const TemplateArgument *Args, unsigned NumArgs, 2509 ASTContext &Context); 2510 2511 static bool classof(const Type *T) { 2512 return T->getTypeClass() == TemplateSpecialization; 2513 } 2514 static bool classof(const TemplateSpecializationType *T) { return true; } 2515}; 2516 2517/// \brief The injected class name of a C++ class template. Used to 2518/// record that a type was spelled with a bare identifier rather than 2519/// as a template-id; the equivalent for non-templated classes is just 2520/// RecordType. 2521/// 2522/// For consistency, template instantiation turns these into RecordTypes. 2523/// 2524/// The desugared form is always a unqualified TemplateSpecializationType. 2525/// The canonical form is always either a TemplateSpecializationType 2526/// (when dependent) or a RecordType (otherwise). 2527class InjectedClassNameType : public Type { 2528 CXXRecordDecl *Decl; 2529 2530 QualType UnderlyingType; 2531 2532 friend class ASTContext; // ASTContext creates these. 2533 InjectedClassNameType(CXXRecordDecl *D, QualType TST, QualType Canon) 2534 : Type(InjectedClassName, Canon, Canon->isDependentType()), 2535 Decl(D), UnderlyingType(TST) { 2536 assert(isa<TemplateSpecializationType>(TST)); 2537 assert(!TST.hasQualifiers()); 2538 assert(TST->getCanonicalTypeInternal() == Canon); 2539 } 2540 2541public: 2542 QualType getUnderlyingType() const { return UnderlyingType; } 2543 const TemplateSpecializationType *getUnderlyingTST() const { 2544 return cast<TemplateSpecializationType>(UnderlyingType.getTypePtr()); 2545 } 2546 2547 CXXRecordDecl *getDecl() const { return Decl; } 2548 2549 bool isSugared() const { return true; } 2550 QualType desugar() const { return UnderlyingType; } 2551 2552 static bool classof(const Type *T) { 2553 return T->getTypeClass() == InjectedClassName; 2554 } 2555 static bool classof(const InjectedClassNameType *T) { return true; } 2556}; 2557 2558/// \brief The elaboration keyword that precedes a qualified type name or 2559/// introduces an elaborated-type-specifier. 2560enum ElaboratedTypeKeyword { 2561 /// \brief No keyword precedes the qualified type name. 2562 ETK_None, 2563 /// \brief The "typename" keyword precedes the qualified type name, e.g., 2564 /// \c typename T::type. 2565 ETK_Typename, 2566 /// \brief The "class" keyword introduces the elaborated-type-specifier. 2567 ETK_Class, 2568 /// \brief The "struct" keyword introduces the elaborated-type-specifier. 2569 ETK_Struct, 2570 /// \brief The "union" keyword introduces the elaborated-type-specifier. 2571 ETK_Union, 2572 /// \brief The "enum" keyword introduces the elaborated-type-specifier. 2573 ETK_Enum 2574}; 2575 2576/// \brief Represents a type that was referred to via a qualified 2577/// name, e.g., N::M::type. 2578/// 2579/// This type is used to keep track of a type name as written in the 2580/// source code, including any nested-name-specifiers. The type itself 2581/// is always "sugar", used to express what was written in the source 2582/// code but containing no additional semantic information. 2583class QualifiedNameType : public Type, public llvm::FoldingSetNode { 2584 /// \brief The nested name specifier containing the qualifier. 2585 NestedNameSpecifier *NNS; 2586 2587 /// \brief The type that this qualified name refers to. 2588 QualType NamedType; 2589 2590 QualifiedNameType(NestedNameSpecifier *NNS, QualType NamedType, 2591 QualType CanonType) 2592 : Type(QualifiedName, CanonType, NamedType->isDependentType()), 2593 NNS(NNS), NamedType(NamedType) { } 2594 2595 friend class ASTContext; // ASTContext creates these 2596 2597public: 2598 /// \brief Retrieve the qualification on this type. 2599 NestedNameSpecifier *getQualifier() const { return NNS; } 2600 2601 /// \brief Retrieve the type named by the qualified-id. 2602 QualType getNamedType() const { return NamedType; } 2603 2604 /// \brief Remove a single level of sugar. 2605 QualType desugar() const { return getNamedType(); } 2606 2607 /// \brief Returns whether this type directly provides sugar. 2608 bool isSugared() const { return true; } 2609 2610 void Profile(llvm::FoldingSetNodeID &ID) { 2611 Profile(ID, NNS, NamedType); 2612 } 2613 2614 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 2615 QualType NamedType) { 2616 ID.AddPointer(NNS); 2617 NamedType.Profile(ID); 2618 } 2619 2620 static bool classof(const Type *T) { 2621 return T->getTypeClass() == QualifiedName; 2622 } 2623 static bool classof(const QualifiedNameType *T) { return true; } 2624}; 2625 2626/// \brief Represents a qualified type name for which the type name is 2627/// dependent. 2628/// 2629/// DependentNameType represents a class of dependent types that involve a 2630/// dependent nested-name-specifier (e.g., "T::") followed by a (dependent) 2631/// name of a type. The DependentNameType may start with a "typename" (for a 2632/// typename-specifier), "class", "struct", "union", or "enum" (for a 2633/// dependent elaborated-type-specifier), or nothing (in contexts where we 2634/// know that we must be referring to a type, e.g., in a base class specifier). 2635class DependentNameType : public Type, public llvm::FoldingSetNode { 2636 /// \brief The keyword used to elaborate this type. 2637 ElaboratedTypeKeyword Keyword; 2638 2639 /// \brief The nested name specifier containing the qualifier. 2640 NestedNameSpecifier *NNS; 2641 2642 typedef llvm::PointerUnion<const IdentifierInfo *, 2643 const TemplateSpecializationType *> NameType; 2644 2645 /// \brief The type that this typename specifier refers to. 2646 NameType Name; 2647 2648 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 2649 const IdentifierInfo *Name, QualType CanonType) 2650 : Type(DependentName, CanonType, true), 2651 Keyword(Keyword), NNS(NNS), Name(Name) { 2652 assert(NNS->isDependent() && 2653 "DependentNameType requires a dependent nested-name-specifier"); 2654 } 2655 2656 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 2657 const TemplateSpecializationType *Ty, QualType CanonType) 2658 : Type(DependentName, CanonType, true), 2659 Keyword(Keyword), NNS(NNS), Name(Ty) { 2660 assert(NNS->isDependent() && 2661 "DependentNameType requires a dependent nested-name-specifier"); 2662 } 2663 2664 friend class ASTContext; // ASTContext creates these 2665 2666public: 2667 /// \brief Retrieve the keyword used to elaborate this type. 2668 ElaboratedTypeKeyword getKeyword() const { return Keyword; } 2669 2670 /// \brief Retrieve the qualification on this type. 2671 NestedNameSpecifier *getQualifier() const { return NNS; } 2672 2673 /// \brief Retrieve the type named by the typename specifier as an 2674 /// identifier. 2675 /// 2676 /// This routine will return a non-NULL identifier pointer when the 2677 /// form of the original typename was terminated by an identifier, 2678 /// e.g., "typename T::type". 2679 const IdentifierInfo *getIdentifier() const { 2680 return Name.dyn_cast<const IdentifierInfo *>(); 2681 } 2682 2683 /// \brief Retrieve the type named by the typename specifier as a 2684 /// type specialization. 2685 const TemplateSpecializationType *getTemplateId() const { 2686 return Name.dyn_cast<const TemplateSpecializationType *>(); 2687 } 2688 2689 bool isSugared() const { return false; } 2690 QualType desugar() const { return QualType(this, 0); } 2691 2692 void Profile(llvm::FoldingSetNodeID &ID) { 2693 Profile(ID, Keyword, NNS, Name); 2694 } 2695 2696 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 2697 NestedNameSpecifier *NNS, NameType Name) { 2698 ID.AddInteger(Keyword); 2699 ID.AddPointer(NNS); 2700 ID.AddPointer(Name.getOpaqueValue()); 2701 } 2702 2703 static bool classof(const Type *T) { 2704 return T->getTypeClass() == DependentName; 2705 } 2706 static bool classof(const DependentNameType *T) { return true; } 2707}; 2708 2709/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 2710/// object oriented design. They basically correspond to C++ classes. There 2711/// are two kinds of interface types, normal interfaces like "NSString" and 2712/// qualified interfaces, which are qualified with a protocol list like 2713/// "NSString<NSCopyable, NSAmazing>". 2714class ObjCInterfaceType : public Type, public llvm::FoldingSetNode { 2715 ObjCInterfaceDecl *Decl; 2716 2717 /// \brief The number of protocols stored after the ObjCInterfaceType node. 2718 /// The list of protocols is sorted on protocol name. No protocol is enterred 2719 /// more than once. 2720 unsigned NumProtocols; 2721 2722 ObjCInterfaceType(QualType Canonical, ObjCInterfaceDecl *D, 2723 ObjCProtocolDecl **Protos, unsigned NumP); 2724 friend class ASTContext; // ASTContext creates these. 2725public: 2726 void Destroy(ASTContext& C); 2727 2728 ObjCInterfaceDecl *getDecl() const { return Decl; } 2729 2730 /// getNumProtocols - Return the number of qualifying protocols in this 2731 /// interface type, or 0 if there are none. 2732 unsigned getNumProtocols() const { return NumProtocols; } 2733 2734 /// \brief Retrieve the Ith protocol. 2735 ObjCProtocolDecl *getProtocol(unsigned I) const { 2736 assert(I < getNumProtocols() && "Out-of-range protocol access"); 2737 return qual_begin()[I]; 2738 } 2739 2740 /// qual_iterator and friends: this provides access to the (potentially empty) 2741 /// list of protocols qualifying this interface. 2742 typedef ObjCProtocolDecl* const * qual_iterator; 2743 qual_iterator qual_begin() const { 2744 return reinterpret_cast<qual_iterator>(this + 1); 2745 } 2746 qual_iterator qual_end() const { 2747 return qual_begin() + NumProtocols; 2748 } 2749 bool qual_empty() const { return NumProtocols == 0; } 2750 2751 bool isSugared() const { return false; } 2752 QualType desugar() const { return QualType(this, 0); } 2753 2754 void Profile(llvm::FoldingSetNodeID &ID); 2755 static void Profile(llvm::FoldingSetNodeID &ID, 2756 const ObjCInterfaceDecl *Decl, 2757 ObjCProtocolDecl * const *protocols, 2758 unsigned NumProtocols); 2759 2760 virtual Linkage getLinkage() const; 2761 2762 static bool classof(const Type *T) { 2763 return T->getTypeClass() == ObjCInterface; 2764 } 2765 static bool classof(const ObjCInterfaceType *) { return true; } 2766}; 2767 2768/// ObjCObjectPointerType - Used to represent 'id', 'Interface *', 'id <p>', 2769/// and 'Interface <p> *'. 2770/// 2771/// Duplicate protocols are removed and protocol list is canonicalized to be in 2772/// alphabetical order. 2773class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 2774 QualType PointeeType; // A builtin or interface type. 2775 2776 /// \brief The number of protocols stored after the ObjCObjectPointerType 2777 /// node. 2778 /// 2779 /// The list of protocols is sorted on protocol name. No protocol is enterred 2780 /// more than once. 2781 unsigned NumProtocols; 2782 2783 ObjCObjectPointerType(QualType Canonical, QualType T, 2784 ObjCProtocolDecl **Protos, unsigned NumP); 2785 friend class ASTContext; // ASTContext creates these. 2786 2787public: 2788 void Destroy(ASTContext& C); 2789 2790 // Get the pointee type. Pointee will either be: 2791 // - a built-in type (for 'id' and 'Class'). 2792 // - an interface type (for user-defined types). 2793 // - a TypedefType whose canonical type is an interface (as in 'T' below). 2794 // For example: typedef NSObject T; T *var; 2795 QualType getPointeeType() const { return PointeeType; } 2796 2797 const ObjCInterfaceType *getInterfaceType() const { 2798 return PointeeType->getAs<ObjCInterfaceType>(); 2799 } 2800 /// getInterfaceDecl - returns an interface decl for user-defined types. 2801 ObjCInterfaceDecl *getInterfaceDecl() const { 2802 return getInterfaceType() ? getInterfaceType()->getDecl() : 0; 2803 } 2804 /// isObjCIdType - true for "id". 2805 bool isObjCIdType() const { 2806 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCId) && 2807 !NumProtocols; 2808 } 2809 /// isObjCClassType - true for "Class". 2810 bool isObjCClassType() const { 2811 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCClass) && 2812 !NumProtocols; 2813 } 2814 2815 /// isObjCQualifiedIdType - true for "id <p>". 2816 bool isObjCQualifiedIdType() const { 2817 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCId) && 2818 NumProtocols; 2819 } 2820 /// isObjCQualifiedClassType - true for "Class <p>". 2821 bool isObjCQualifiedClassType() const { 2822 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCClass) && 2823 NumProtocols; 2824 } 2825 /// qual_iterator and friends: this provides access to the (potentially empty) 2826 /// list of protocols qualifying this interface. 2827 typedef ObjCProtocolDecl* const * qual_iterator; 2828 2829 qual_iterator qual_begin() const { 2830 return reinterpret_cast<qual_iterator> (this + 1); 2831 } 2832 qual_iterator qual_end() const { 2833 return qual_begin() + NumProtocols; 2834 } 2835 bool qual_empty() const { return NumProtocols == 0; } 2836 2837 /// getNumProtocols - Return the number of qualifying protocols in this 2838 /// interface type, or 0 if there are none. 2839 unsigned getNumProtocols() const { return NumProtocols; } 2840 2841 /// \brief Retrieve the Ith protocol. 2842 ObjCProtocolDecl *getProtocol(unsigned I) const { 2843 assert(I < getNumProtocols() && "Out-of-range protocol access"); 2844 return qual_begin()[I]; 2845 } 2846 2847 bool isSugared() const { return false; } 2848 QualType desugar() const { return QualType(this, 0); } 2849 2850 virtual Linkage getLinkage() const; 2851 2852 void Profile(llvm::FoldingSetNodeID &ID); 2853 static void Profile(llvm::FoldingSetNodeID &ID, QualType T, 2854 ObjCProtocolDecl *const *protocols, 2855 unsigned NumProtocols); 2856 static bool classof(const Type *T) { 2857 return T->getTypeClass() == ObjCObjectPointer; 2858 } 2859 static bool classof(const ObjCObjectPointerType *) { return true; } 2860}; 2861 2862/// A qualifier set is used to build a set of qualifiers. 2863class QualifierCollector : public Qualifiers { 2864 ASTContext *Context; 2865 2866public: 2867 QualifierCollector(Qualifiers Qs = Qualifiers()) 2868 : Qualifiers(Qs), Context(0) {} 2869 QualifierCollector(ASTContext &Context, Qualifiers Qs = Qualifiers()) 2870 : Qualifiers(Qs), Context(&Context) {} 2871 2872 void setContext(ASTContext &C) { Context = &C; } 2873 2874 /// Collect any qualifiers on the given type and return an 2875 /// unqualified type. 2876 const Type *strip(QualType QT) { 2877 addFastQualifiers(QT.getLocalFastQualifiers()); 2878 if (QT.hasLocalNonFastQualifiers()) { 2879 const ExtQuals *EQ = QT.getExtQualsUnsafe(); 2880 Context = &EQ->getContext(); 2881 addQualifiers(EQ->getQualifiers()); 2882 return EQ->getBaseType(); 2883 } 2884 return QT.getTypePtrUnsafe(); 2885 } 2886 2887 /// Apply the collected qualifiers to the given type. 2888 QualType apply(QualType QT) const; 2889 2890 /// Apply the collected qualifiers to the given type. 2891 QualType apply(const Type* T) const; 2892 2893}; 2894 2895 2896// Inline function definitions. 2897 2898inline bool QualType::isCanonical() const { 2899 const Type *T = getTypePtr(); 2900 if (hasLocalQualifiers()) 2901 return T->isCanonicalUnqualified() && !isa<ArrayType>(T); 2902 return T->isCanonicalUnqualified(); 2903} 2904 2905inline bool QualType::isCanonicalAsParam() const { 2906 if (hasLocalQualifiers()) return false; 2907 const Type *T = getTypePtr(); 2908 return T->isCanonicalUnqualified() && 2909 !isa<FunctionType>(T) && !isa<ArrayType>(T); 2910} 2911 2912inline bool QualType::isConstQualified() const { 2913 return isLocalConstQualified() || 2914 getTypePtr()->getCanonicalTypeInternal().isLocalConstQualified(); 2915} 2916 2917inline bool QualType::isRestrictQualified() const { 2918 return isLocalRestrictQualified() || 2919 getTypePtr()->getCanonicalTypeInternal().isLocalRestrictQualified(); 2920} 2921 2922 2923inline bool QualType::isVolatileQualified() const { 2924 return isLocalVolatileQualified() || 2925 getTypePtr()->getCanonicalTypeInternal().isLocalVolatileQualified(); 2926} 2927 2928inline bool QualType::hasQualifiers() const { 2929 return hasLocalQualifiers() || 2930 getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers(); 2931} 2932 2933inline Qualifiers QualType::getQualifiers() const { 2934 Qualifiers Quals = getLocalQualifiers(); 2935 Quals.addQualifiers( 2936 getTypePtr()->getCanonicalTypeInternal().getLocalQualifiers()); 2937 return Quals; 2938} 2939 2940inline unsigned QualType::getCVRQualifiers() const { 2941 return getLocalCVRQualifiers() | 2942 getTypePtr()->getCanonicalTypeInternal().getLocalCVRQualifiers(); 2943} 2944 2945/// getCVRQualifiersThroughArrayTypes - If there are CVR qualifiers for this 2946/// type, returns them. Otherwise, if this is an array type, recurses 2947/// on the element type until some qualifiers have been found or a non-array 2948/// type reached. 2949inline unsigned QualType::getCVRQualifiersThroughArrayTypes() const { 2950 if (unsigned Quals = getCVRQualifiers()) 2951 return Quals; 2952 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2953 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 2954 return AT->getElementType().getCVRQualifiersThroughArrayTypes(); 2955 return 0; 2956} 2957 2958inline void QualType::removeConst() { 2959 removeFastQualifiers(Qualifiers::Const); 2960} 2961 2962inline void QualType::removeRestrict() { 2963 removeFastQualifiers(Qualifiers::Restrict); 2964} 2965 2966inline void QualType::removeVolatile() { 2967 QualifierCollector Qc; 2968 const Type *Ty = Qc.strip(*this); 2969 if (Qc.hasVolatile()) { 2970 Qc.removeVolatile(); 2971 *this = Qc.apply(Ty); 2972 } 2973} 2974 2975inline void QualType::removeCVRQualifiers(unsigned Mask) { 2976 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 2977 2978 // Fast path: we don't need to touch the slow qualifiers. 2979 if (!(Mask & ~Qualifiers::FastMask)) { 2980 removeFastQualifiers(Mask); 2981 return; 2982 } 2983 2984 QualifierCollector Qc; 2985 const Type *Ty = Qc.strip(*this); 2986 Qc.removeCVRQualifiers(Mask); 2987 *this = Qc.apply(Ty); 2988} 2989 2990/// getAddressSpace - Return the address space of this type. 2991inline unsigned QualType::getAddressSpace() const { 2992 if (hasLocalNonFastQualifiers()) { 2993 const ExtQuals *EQ = getExtQualsUnsafe(); 2994 if (EQ->hasAddressSpace()) 2995 return EQ->getAddressSpace(); 2996 } 2997 2998 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2999 if (CT.hasLocalNonFastQualifiers()) { 3000 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 3001 if (EQ->hasAddressSpace()) 3002 return EQ->getAddressSpace(); 3003 } 3004 3005 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3006 return AT->getElementType().getAddressSpace(); 3007 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 3008 return RT->getAddressSpace(); 3009 return 0; 3010} 3011 3012/// getObjCGCAttr - Return the gc attribute of this type. 3013inline Qualifiers::GC QualType::getObjCGCAttr() const { 3014 if (hasLocalNonFastQualifiers()) { 3015 const ExtQuals *EQ = getExtQualsUnsafe(); 3016 if (EQ->hasObjCGCAttr()) 3017 return EQ->getObjCGCAttr(); 3018 } 3019 3020 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3021 if (CT.hasLocalNonFastQualifiers()) { 3022 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 3023 if (EQ->hasObjCGCAttr()) 3024 return EQ->getObjCGCAttr(); 3025 } 3026 3027 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3028 return AT->getElementType().getObjCGCAttr(); 3029 if (const ObjCObjectPointerType *PT = CT->getAs<ObjCObjectPointerType>()) 3030 return PT->getPointeeType().getObjCGCAttr(); 3031 // We most look at all pointer types, not just pointer to interface types. 3032 if (const PointerType *PT = CT->getAs<PointerType>()) 3033 return PT->getPointeeType().getObjCGCAttr(); 3034 return Qualifiers::GCNone; 3035} 3036 3037inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { 3038 if (const PointerType *PT = t.getAs<PointerType>()) { 3039 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 3040 return FT->getExtInfo(); 3041 } else if (const FunctionType *FT = t.getAs<FunctionType>()) 3042 return FT->getExtInfo(); 3043 3044 return FunctionType::ExtInfo(); 3045} 3046 3047inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { 3048 return getFunctionExtInfo(*t); 3049} 3050 3051/// isMoreQualifiedThan - Determine whether this type is more 3052/// qualified than the Other type. For example, "const volatile int" 3053/// is more qualified than "const int", "volatile int", and 3054/// "int". However, it is not more qualified than "const volatile 3055/// int". 3056inline bool QualType::isMoreQualifiedThan(QualType Other) const { 3057 // FIXME: work on arbitrary qualifiers 3058 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 3059 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 3060 if (getAddressSpace() != Other.getAddressSpace()) 3061 return false; 3062 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 3063} 3064 3065/// isAtLeastAsQualifiedAs - Determine whether this type is at last 3066/// as qualified as the Other type. For example, "const volatile 3067/// int" is at least as qualified as "const int", "volatile int", 3068/// "int", and "const volatile int". 3069inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 3070 // FIXME: work on arbitrary qualifiers 3071 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 3072 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 3073 if (getAddressSpace() != Other.getAddressSpace()) 3074 return false; 3075 return (MyQuals | OtherQuals) == MyQuals; 3076} 3077 3078/// getNonReferenceType - If Type is a reference type (e.g., const 3079/// int&), returns the type that the reference refers to ("const 3080/// int"). Otherwise, returns the type itself. This routine is used 3081/// throughout Sema to implement C++ 5p6: 3082/// 3083/// If an expression initially has the type "reference to T" (8.3.2, 3084/// 8.5.3), the type is adjusted to "T" prior to any further 3085/// analysis, the expression designates the object or function 3086/// denoted by the reference, and the expression is an lvalue. 3087inline QualType QualType::getNonReferenceType() const { 3088 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 3089 return RefType->getPointeeType(); 3090 else 3091 return *this; 3092} 3093 3094inline const ObjCInterfaceType *Type::getAsPointerToObjCInterfaceType() const { 3095 if (const PointerType *PT = getAs<PointerType>()) 3096 return PT->getPointeeType()->getAs<ObjCInterfaceType>(); 3097 return 0; 3098} 3099 3100inline bool Type::isFunctionType() const { 3101 return isa<FunctionType>(CanonicalType); 3102} 3103inline bool Type::isPointerType() const { 3104 return isa<PointerType>(CanonicalType); 3105} 3106inline bool Type::isAnyPointerType() const { 3107 return isPointerType() || isObjCObjectPointerType(); 3108} 3109inline bool Type::isBlockPointerType() const { 3110 return isa<BlockPointerType>(CanonicalType); 3111} 3112inline bool Type::isReferenceType() const { 3113 return isa<ReferenceType>(CanonicalType); 3114} 3115inline bool Type::isLValueReferenceType() const { 3116 return isa<LValueReferenceType>(CanonicalType); 3117} 3118inline bool Type::isRValueReferenceType() const { 3119 return isa<RValueReferenceType>(CanonicalType); 3120} 3121inline bool Type::isFunctionPointerType() const { 3122 if (const PointerType* T = getAs<PointerType>()) 3123 return T->getPointeeType()->isFunctionType(); 3124 else 3125 return false; 3126} 3127inline bool Type::isMemberPointerType() const { 3128 return isa<MemberPointerType>(CanonicalType); 3129} 3130inline bool Type::isMemberFunctionPointerType() const { 3131 if (const MemberPointerType* T = getAs<MemberPointerType>()) 3132 return T->getPointeeType()->isFunctionType(); 3133 else 3134 return false; 3135} 3136inline bool Type::isArrayType() const { 3137 return isa<ArrayType>(CanonicalType); 3138} 3139inline bool Type::isConstantArrayType() const { 3140 return isa<ConstantArrayType>(CanonicalType); 3141} 3142inline bool Type::isIncompleteArrayType() const { 3143 return isa<IncompleteArrayType>(CanonicalType); 3144} 3145inline bool Type::isVariableArrayType() const { 3146 return isa<VariableArrayType>(CanonicalType); 3147} 3148inline bool Type::isDependentSizedArrayType() const { 3149 return isa<DependentSizedArrayType>(CanonicalType); 3150} 3151inline bool Type::isRecordType() const { 3152 return isa<RecordType>(CanonicalType); 3153} 3154inline bool Type::isAnyComplexType() const { 3155 return isa<ComplexType>(CanonicalType); 3156} 3157inline bool Type::isVectorType() const { 3158 return isa<VectorType>(CanonicalType); 3159} 3160inline bool Type::isExtVectorType() const { 3161 return isa<ExtVectorType>(CanonicalType); 3162} 3163inline bool Type::isObjCObjectPointerType() const { 3164 return isa<ObjCObjectPointerType>(CanonicalType); 3165} 3166inline bool Type::isObjCInterfaceType() const { 3167 return isa<ObjCInterfaceType>(CanonicalType); 3168} 3169inline bool Type::isObjCQualifiedIdType() const { 3170 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3171 return OPT->isObjCQualifiedIdType(); 3172 return false; 3173} 3174inline bool Type::isObjCQualifiedClassType() const { 3175 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3176 return OPT->isObjCQualifiedClassType(); 3177 return false; 3178} 3179inline bool Type::isObjCIdType() const { 3180 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3181 return OPT->isObjCIdType(); 3182 return false; 3183} 3184inline bool Type::isObjCClassType() const { 3185 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3186 return OPT->isObjCClassType(); 3187 return false; 3188} 3189inline bool Type::isObjCSelType() const { 3190 if (const PointerType *OPT = getAs<PointerType>()) 3191 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 3192 return false; 3193} 3194inline bool Type::isObjCBuiltinType() const { 3195 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 3196} 3197inline bool Type::isTemplateTypeParmType() const { 3198 return isa<TemplateTypeParmType>(CanonicalType); 3199} 3200 3201inline bool Type::isSpecificBuiltinType(unsigned K) const { 3202 if (const BuiltinType *BT = getAs<BuiltinType>()) 3203 if (BT->getKind() == (BuiltinType::Kind) K) 3204 return true; 3205 return false; 3206} 3207 3208/// \brief Determines whether this is a type for which one can define 3209/// an overloaded operator. 3210inline bool Type::isOverloadableType() const { 3211 return isDependentType() || isRecordType() || isEnumeralType(); 3212} 3213 3214inline bool Type::hasPointerRepresentation() const { 3215 return (isPointerType() || isReferenceType() || isBlockPointerType() || 3216 isObjCInterfaceType() || isObjCObjectPointerType() || 3217 isObjCQualifiedInterfaceType() || isNullPtrType()); 3218} 3219 3220inline bool Type::hasObjCPointerRepresentation() const { 3221 return (isObjCInterfaceType() || isObjCObjectPointerType() || 3222 isObjCQualifiedInterfaceType()); 3223} 3224 3225/// Insertion operator for diagnostics. This allows sending QualType's into a 3226/// diagnostic with <<. 3227inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 3228 QualType T) { 3229 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 3230 Diagnostic::ak_qualtype); 3231 return DB; 3232} 3233 3234/// Insertion operator for partial diagnostics. This allows sending QualType's 3235/// into a diagnostic with <<. 3236inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, 3237 QualType T) { 3238 PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 3239 Diagnostic::ak_qualtype); 3240 return PD; 3241} 3242 3243// Helper class template that is used by Type::getAs to ensure that one does 3244// not try to look through a qualified type to get to an array type. 3245template<typename T, 3246 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 3247 llvm::is_base_of<ArrayType, T>::value)> 3248struct ArrayType_cannot_be_used_with_getAs { }; 3249 3250template<typename T> 3251struct ArrayType_cannot_be_used_with_getAs<T, true>; 3252 3253/// Member-template getAs<specific type>'. 3254template <typename T> const T *Type::getAs() const { 3255 ArrayType_cannot_be_used_with_getAs<T> at; 3256 (void)at; 3257 3258 // If this is directly a T type, return it. 3259 if (const T *Ty = dyn_cast<T>(this)) 3260 return Ty; 3261 3262 // If the canonical form of this type isn't the right kind, reject it. 3263 if (!isa<T>(CanonicalType)) 3264 return 0; 3265 3266 // If this is a typedef for the type, strip the typedef off without 3267 // losing all typedef information. 3268 return cast<T>(getUnqualifiedDesugaredType()); 3269} 3270 3271} // end namespace clang 3272 3273#endif 3274