Type.h revision bef0efd11bc4430a3ee437a3213cec5c18af855a
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 ElaboratedType; 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 /// \brief Retrieves the CXXRecordDecl that this type refers to, either 927 /// because the type is a RecordType or because it is the injected-class-name 928 /// type of a class template or class template partial specialization. 929 CXXRecordDecl *getAsCXXRecordDecl() const; 930 931 // Member-template getAs<specific type>'. This scheme will eventually 932 // replace the specific getAsXXXX methods above. 933 // 934 // There are some specializations of this member template listed 935 // immediately following this class. 936 template <typename T> const T *getAs() const; 937 938 /// getAsPointerToObjCInterfaceType - If this is a pointer to an ObjC 939 /// interface, return the interface type, otherwise return null. 940 const ObjCInterfaceType *getAsPointerToObjCInterfaceType() const; 941 942 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 943 /// element type of the array, potentially with type qualifiers missing. 944 /// This method should never be used when type qualifiers are meaningful. 945 const Type *getArrayElementTypeNoTypeQual() const; 946 947 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 948 /// pointer, this returns the respective pointee. 949 QualType getPointeeType() const; 950 951 /// getUnqualifiedDesugaredType() - Return the specified type with 952 /// any "sugar" removed from the type, removing any typedefs, 953 /// typeofs, etc., as well as any qualifiers. 954 const Type *getUnqualifiedDesugaredType() const; 955 956 /// More type predicates useful for type checking/promotion 957 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 958 959 /// isSignedIntegerType - Return true if this is an integer type that is 960 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 961 /// an enum decl which has a signed representation, or a vector of signed 962 /// integer element type. 963 bool isSignedIntegerType() const; 964 965 /// isUnsignedIntegerType - Return true if this is an integer type that is 966 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 967 /// decl which has an unsigned representation, or a vector of unsigned integer 968 /// element type. 969 bool isUnsignedIntegerType() const; 970 971 /// isConstantSizeType - Return true if this is not a variable sized type, 972 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 973 /// incomplete types. 974 bool isConstantSizeType() const; 975 976 /// isSpecifierType - Returns true if this type can be represented by some 977 /// set of type specifiers. 978 bool isSpecifierType() const; 979 980 const char *getTypeClassName() const; 981 982 /// \brief Determine the linkage of this type. 983 virtual Linkage getLinkage() const; 984 985 QualType getCanonicalTypeInternal() const { 986 return CanonicalType; 987 } 988 CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h 989 void dump() const; 990 static bool classof(const Type *) { return true; } 991}; 992 993template <> inline const TypedefType *Type::getAs() const { 994 return dyn_cast<TypedefType>(this); 995} 996 997// We can do canonical leaf types faster, because we don't have to 998// worry about preserving child type decoration. 999#define TYPE(Class, Base) 1000#define LEAF_TYPE(Class) \ 1001template <> inline const Class##Type *Type::getAs() const { \ 1002 return dyn_cast<Class##Type>(CanonicalType); \ 1003} 1004#include "clang/AST/TypeNodes.def" 1005 1006 1007/// BuiltinType - This class is used for builtin types like 'int'. Builtin 1008/// types are always canonical and have a literal name field. 1009class BuiltinType : public Type { 1010public: 1011 enum Kind { 1012 Void, 1013 1014 Bool, // This is bool and/or _Bool. 1015 Char_U, // This is 'char' for targets where char is unsigned. 1016 UChar, // This is explicitly qualified unsigned char. 1017 Char16, // This is 'char16_t' for C++. 1018 Char32, // This is 'char32_t' for C++. 1019 UShort, 1020 UInt, 1021 ULong, 1022 ULongLong, 1023 UInt128, // __uint128_t 1024 1025 Char_S, // This is 'char' for targets where char is signed. 1026 SChar, // This is explicitly qualified signed char. 1027 WChar, // This is 'wchar_t' for C++. 1028 Short, 1029 Int, 1030 Long, 1031 LongLong, 1032 Int128, // __int128_t 1033 1034 Float, Double, LongDouble, 1035 1036 NullPtr, // This is the type of C++0x 'nullptr'. 1037 1038 Overload, // This represents the type of an overloaded function declaration. 1039 Dependent, // This represents the type of a type-dependent expression. 1040 1041 UndeducedAuto, // In C++0x, this represents the type of an auto variable 1042 // that has not been deduced yet. 1043 ObjCId, // This represents the ObjC 'id' type. 1044 ObjCClass, // This represents the ObjC 'Class' type. 1045 ObjCSel // This represents the ObjC 'SEL' type. 1046 }; 1047private: 1048 Kind TypeKind; 1049public: 1050 BuiltinType(Kind K) 1051 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent)), 1052 TypeKind(K) {} 1053 1054 Kind getKind() const { return TypeKind; } 1055 const char *getName(const LangOptions &LO) const; 1056 1057 bool isSugared() const { return false; } 1058 QualType desugar() const { return QualType(this, 0); } 1059 1060 bool isInteger() const { 1061 return TypeKind >= Bool && TypeKind <= Int128; 1062 } 1063 1064 bool isSignedInteger() const { 1065 return TypeKind >= Char_S && TypeKind <= Int128; 1066 } 1067 1068 bool isUnsignedInteger() const { 1069 return TypeKind >= Bool && TypeKind <= UInt128; 1070 } 1071 1072 bool isFloatingPoint() const { 1073 return TypeKind >= Float && TypeKind <= LongDouble; 1074 } 1075 1076 virtual Linkage getLinkage() const; 1077 1078 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1079 static bool classof(const BuiltinType *) { return true; } 1080}; 1081 1082/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1083/// types (_Complex float etc) as well as the GCC integer complex extensions. 1084/// 1085class ComplexType : public Type, public llvm::FoldingSetNode { 1086 QualType ElementType; 1087 ComplexType(QualType Element, QualType CanonicalPtr) : 1088 Type(Complex, CanonicalPtr, Element->isDependentType()), 1089 ElementType(Element) { 1090 } 1091 friend class ASTContext; // ASTContext creates these. 1092public: 1093 QualType getElementType() const { return ElementType; } 1094 1095 bool isSugared() const { return false; } 1096 QualType desugar() const { return QualType(this, 0); } 1097 1098 void Profile(llvm::FoldingSetNodeID &ID) { 1099 Profile(ID, getElementType()); 1100 } 1101 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1102 ID.AddPointer(Element.getAsOpaquePtr()); 1103 } 1104 1105 virtual Linkage getLinkage() const; 1106 1107 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1108 static bool classof(const ComplexType *) { return true; } 1109}; 1110 1111/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1112/// 1113class PointerType : public Type, public llvm::FoldingSetNode { 1114 QualType PointeeType; 1115 1116 PointerType(QualType Pointee, QualType CanonicalPtr) : 1117 Type(Pointer, CanonicalPtr, Pointee->isDependentType()), PointeeType(Pointee) { 1118 } 1119 friend class ASTContext; // ASTContext creates these. 1120public: 1121 1122 QualType getPointeeType() const { return PointeeType; } 1123 1124 bool isSugared() const { return false; } 1125 QualType desugar() const { return QualType(this, 0); } 1126 1127 void Profile(llvm::FoldingSetNodeID &ID) { 1128 Profile(ID, getPointeeType()); 1129 } 1130 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1131 ID.AddPointer(Pointee.getAsOpaquePtr()); 1132 } 1133 1134 virtual Linkage getLinkage() const; 1135 1136 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1137 static bool classof(const PointerType *) { return true; } 1138}; 1139 1140/// BlockPointerType - pointer to a block type. 1141/// This type is to represent types syntactically represented as 1142/// "void (^)(int)", etc. Pointee is required to always be a function type. 1143/// 1144class BlockPointerType : public Type, public llvm::FoldingSetNode { 1145 QualType PointeeType; // Block is some kind of pointer type 1146 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1147 Type(BlockPointer, CanonicalCls, Pointee->isDependentType()), 1148 PointeeType(Pointee) { 1149 } 1150 friend class ASTContext; // ASTContext creates these. 1151public: 1152 1153 // Get the pointee type. Pointee is required to always be a function type. 1154 QualType getPointeeType() const { return PointeeType; } 1155 1156 bool isSugared() const { return false; } 1157 QualType desugar() const { return QualType(this, 0); } 1158 1159 void Profile(llvm::FoldingSetNodeID &ID) { 1160 Profile(ID, getPointeeType()); 1161 } 1162 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1163 ID.AddPointer(Pointee.getAsOpaquePtr()); 1164 } 1165 1166 virtual Linkage getLinkage() const; 1167 1168 static bool classof(const Type *T) { 1169 return T->getTypeClass() == BlockPointer; 1170 } 1171 static bool classof(const BlockPointerType *) { return true; } 1172}; 1173 1174/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 1175/// 1176class ReferenceType : public Type, public llvm::FoldingSetNode { 1177 QualType PointeeType; 1178 1179 /// True if the type was originally spelled with an lvalue sigil. 1180 /// This is never true of rvalue references but can also be false 1181 /// on lvalue references because of C++0x [dcl.typedef]p9, 1182 /// as follows: 1183 /// 1184 /// typedef int &ref; // lvalue, spelled lvalue 1185 /// typedef int &&rvref; // rvalue 1186 /// ref &a; // lvalue, inner ref, spelled lvalue 1187 /// ref &&a; // lvalue, inner ref 1188 /// rvref &a; // lvalue, inner ref, spelled lvalue 1189 /// rvref &&a; // rvalue, inner ref 1190 bool SpelledAsLValue; 1191 1192 /// True if the inner type is a reference type. This only happens 1193 /// in non-canonical forms. 1194 bool InnerRef; 1195 1196protected: 1197 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 1198 bool SpelledAsLValue) : 1199 Type(tc, CanonicalRef, Referencee->isDependentType()), 1200 PointeeType(Referencee), SpelledAsLValue(SpelledAsLValue), 1201 InnerRef(Referencee->isReferenceType()) { 1202 } 1203public: 1204 bool isSpelledAsLValue() const { return SpelledAsLValue; } 1205 bool isInnerRef() const { return InnerRef; } 1206 1207 QualType getPointeeTypeAsWritten() const { return PointeeType; } 1208 QualType getPointeeType() const { 1209 // FIXME: this might strip inner qualifiers; okay? 1210 const ReferenceType *T = this; 1211 while (T->InnerRef) 1212 T = T->PointeeType->getAs<ReferenceType>(); 1213 return T->PointeeType; 1214 } 1215 1216 void Profile(llvm::FoldingSetNodeID &ID) { 1217 Profile(ID, PointeeType, SpelledAsLValue); 1218 } 1219 static void Profile(llvm::FoldingSetNodeID &ID, 1220 QualType Referencee, 1221 bool SpelledAsLValue) { 1222 ID.AddPointer(Referencee.getAsOpaquePtr()); 1223 ID.AddBoolean(SpelledAsLValue); 1224 } 1225 1226 virtual Linkage getLinkage() const; 1227 1228 static bool classof(const Type *T) { 1229 return T->getTypeClass() == LValueReference || 1230 T->getTypeClass() == RValueReference; 1231 } 1232 static bool classof(const ReferenceType *) { return true; } 1233}; 1234 1235/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 1236/// 1237class LValueReferenceType : public ReferenceType { 1238 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 1239 bool SpelledAsLValue) : 1240 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 1241 {} 1242 friend class ASTContext; // ASTContext creates these 1243public: 1244 bool isSugared() const { return false; } 1245 QualType desugar() const { return QualType(this, 0); } 1246 1247 static bool classof(const Type *T) { 1248 return T->getTypeClass() == LValueReference; 1249 } 1250 static bool classof(const LValueReferenceType *) { return true; } 1251}; 1252 1253/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 1254/// 1255class RValueReferenceType : public ReferenceType { 1256 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 1257 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 1258 } 1259 friend class ASTContext; // ASTContext creates these 1260public: 1261 bool isSugared() const { return false; } 1262 QualType desugar() const { return QualType(this, 0); } 1263 1264 static bool classof(const Type *T) { 1265 return T->getTypeClass() == RValueReference; 1266 } 1267 static bool classof(const RValueReferenceType *) { return true; } 1268}; 1269 1270/// MemberPointerType - C++ 8.3.3 - Pointers to members 1271/// 1272class MemberPointerType : public Type, public llvm::FoldingSetNode { 1273 QualType PointeeType; 1274 /// The class of which the pointee is a member. Must ultimately be a 1275 /// RecordType, but could be a typedef or a template parameter too. 1276 const Type *Class; 1277 1278 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 1279 Type(MemberPointer, CanonicalPtr, 1280 Cls->isDependentType() || Pointee->isDependentType()), 1281 PointeeType(Pointee), Class(Cls) { 1282 } 1283 friend class ASTContext; // ASTContext creates these. 1284public: 1285 1286 QualType getPointeeType() const { return PointeeType; } 1287 1288 const Type *getClass() const { return Class; } 1289 1290 bool isSugared() const { return false; } 1291 QualType desugar() const { return QualType(this, 0); } 1292 1293 void Profile(llvm::FoldingSetNodeID &ID) { 1294 Profile(ID, getPointeeType(), getClass()); 1295 } 1296 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 1297 const Type *Class) { 1298 ID.AddPointer(Pointee.getAsOpaquePtr()); 1299 ID.AddPointer(Class); 1300 } 1301 1302 virtual Linkage getLinkage() const; 1303 1304 static bool classof(const Type *T) { 1305 return T->getTypeClass() == MemberPointer; 1306 } 1307 static bool classof(const MemberPointerType *) { return true; } 1308}; 1309 1310/// ArrayType - C99 6.7.5.2 - Array Declarators. 1311/// 1312class ArrayType : public Type, public llvm::FoldingSetNode { 1313public: 1314 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 1315 /// an array with a static size (e.g. int X[static 4]), or an array 1316 /// with a star size (e.g. int X[*]). 1317 /// 'static' is only allowed on function parameters. 1318 enum ArraySizeModifier { 1319 Normal, Static, Star 1320 }; 1321private: 1322 /// ElementType - The element type of the array. 1323 QualType ElementType; 1324 1325 // NOTE: VC++ treats enums as signed, avoid using the ArraySizeModifier enum 1326 /// NOTE: These fields are packed into the bitfields space in the Type class. 1327 unsigned SizeModifier : 2; 1328 1329 /// IndexTypeQuals - Capture qualifiers in declarations like: 1330 /// 'int X[static restrict 4]'. For function parameters only. 1331 unsigned IndexTypeQuals : 3; 1332 1333protected: 1334 // C++ [temp.dep.type]p1: 1335 // A type is dependent if it is... 1336 // - an array type constructed from any dependent type or whose 1337 // size is specified by a constant expression that is 1338 // value-dependent, 1339 ArrayType(TypeClass tc, QualType et, QualType can, 1340 ArraySizeModifier sm, unsigned tq) 1341 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray), 1342 ElementType(et), SizeModifier(sm), IndexTypeQuals(tq) {} 1343 1344 friend class ASTContext; // ASTContext creates these. 1345public: 1346 QualType getElementType() const { return ElementType; } 1347 ArraySizeModifier getSizeModifier() const { 1348 return ArraySizeModifier(SizeModifier); 1349 } 1350 Qualifiers getIndexTypeQualifiers() const { 1351 return Qualifiers::fromCVRMask(IndexTypeQuals); 1352 } 1353 unsigned getIndexTypeCVRQualifiers() const { return IndexTypeQuals; } 1354 1355 virtual Linkage getLinkage() const; 1356 1357 static bool classof(const Type *T) { 1358 return T->getTypeClass() == ConstantArray || 1359 T->getTypeClass() == VariableArray || 1360 T->getTypeClass() == IncompleteArray || 1361 T->getTypeClass() == DependentSizedArray; 1362 } 1363 static bool classof(const ArrayType *) { return true; } 1364}; 1365 1366/// ConstantArrayType - This class represents the canonical version of 1367/// C arrays with a specified constant size. For example, the canonical 1368/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 1369/// type is 'int' and the size is 404. 1370class ConstantArrayType : public ArrayType { 1371 llvm::APInt Size; // Allows us to unique the type. 1372 1373 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 1374 ArraySizeModifier sm, unsigned tq) 1375 : ArrayType(ConstantArray, et, can, sm, tq), 1376 Size(size) {} 1377protected: 1378 ConstantArrayType(TypeClass tc, QualType et, QualType can, 1379 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 1380 : ArrayType(tc, et, can, sm, tq), Size(size) {} 1381 friend class ASTContext; // ASTContext creates these. 1382public: 1383 const llvm::APInt &getSize() const { return Size; } 1384 bool isSugared() const { return false; } 1385 QualType desugar() const { return QualType(this, 0); } 1386 1387 void Profile(llvm::FoldingSetNodeID &ID) { 1388 Profile(ID, getElementType(), getSize(), 1389 getSizeModifier(), getIndexTypeCVRQualifiers()); 1390 } 1391 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1392 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 1393 unsigned TypeQuals) { 1394 ID.AddPointer(ET.getAsOpaquePtr()); 1395 ID.AddInteger(ArraySize.getZExtValue()); 1396 ID.AddInteger(SizeMod); 1397 ID.AddInteger(TypeQuals); 1398 } 1399 static bool classof(const Type *T) { 1400 return T->getTypeClass() == ConstantArray; 1401 } 1402 static bool classof(const ConstantArrayType *) { return true; } 1403}; 1404 1405/// IncompleteArrayType - This class represents C arrays with an unspecified 1406/// size. For example 'int A[]' has an IncompleteArrayType where the element 1407/// type is 'int' and the size is unspecified. 1408class IncompleteArrayType : public ArrayType { 1409 1410 IncompleteArrayType(QualType et, QualType can, 1411 ArraySizeModifier sm, unsigned tq) 1412 : ArrayType(IncompleteArray, et, can, sm, tq) {} 1413 friend class ASTContext; // ASTContext creates these. 1414public: 1415 bool isSugared() const { return false; } 1416 QualType desugar() const { return QualType(this, 0); } 1417 1418 static bool classof(const Type *T) { 1419 return T->getTypeClass() == IncompleteArray; 1420 } 1421 static bool classof(const IncompleteArrayType *) { return true; } 1422 1423 friend class StmtIteratorBase; 1424 1425 void Profile(llvm::FoldingSetNodeID &ID) { 1426 Profile(ID, getElementType(), getSizeModifier(), 1427 getIndexTypeCVRQualifiers()); 1428 } 1429 1430 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1431 ArraySizeModifier SizeMod, unsigned TypeQuals) { 1432 ID.AddPointer(ET.getAsOpaquePtr()); 1433 ID.AddInteger(SizeMod); 1434 ID.AddInteger(TypeQuals); 1435 } 1436}; 1437 1438/// VariableArrayType - This class represents C arrays with a specified size 1439/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 1440/// Since the size expression is an arbitrary expression, we store it as such. 1441/// 1442/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 1443/// should not be: two lexically equivalent variable array types could mean 1444/// different things, for example, these variables do not have the same type 1445/// dynamically: 1446/// 1447/// void foo(int x) { 1448/// int Y[x]; 1449/// ++x; 1450/// int Z[x]; 1451/// } 1452/// 1453class VariableArrayType : public ArrayType { 1454 /// SizeExpr - An assignment expression. VLA's are only permitted within 1455 /// a function block. 1456 Stmt *SizeExpr; 1457 /// Brackets - The left and right array brackets. 1458 SourceRange Brackets; 1459 1460 VariableArrayType(QualType et, QualType can, Expr *e, 1461 ArraySizeModifier sm, unsigned tq, 1462 SourceRange brackets) 1463 : ArrayType(VariableArray, et, can, sm, tq), 1464 SizeExpr((Stmt*) e), Brackets(brackets) {} 1465 friend class ASTContext; // ASTContext creates these. 1466 virtual void Destroy(ASTContext& C); 1467 1468public: 1469 Expr *getSizeExpr() const { 1470 // We use C-style casts instead of cast<> here because we do not wish 1471 // to have a dependency of Type.h on Stmt.h/Expr.h. 1472 return (Expr*) SizeExpr; 1473 } 1474 SourceRange getBracketsRange() const { return Brackets; } 1475 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1476 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1477 1478 bool isSugared() const { return false; } 1479 QualType desugar() const { return QualType(this, 0); } 1480 1481 static bool classof(const Type *T) { 1482 return T->getTypeClass() == VariableArray; 1483 } 1484 static bool classof(const VariableArrayType *) { return true; } 1485 1486 friend class StmtIteratorBase; 1487 1488 void Profile(llvm::FoldingSetNodeID &ID) { 1489 assert(0 && "Cannnot unique VariableArrayTypes."); 1490 } 1491}; 1492 1493/// DependentSizedArrayType - This type represents an array type in 1494/// C++ whose size is a value-dependent expression. For example: 1495/// 1496/// \code 1497/// template<typename T, int Size> 1498/// class array { 1499/// T data[Size]; 1500/// }; 1501/// \endcode 1502/// 1503/// For these types, we won't actually know what the array bound is 1504/// until template instantiation occurs, at which point this will 1505/// become either a ConstantArrayType or a VariableArrayType. 1506class DependentSizedArrayType : public ArrayType { 1507 ASTContext &Context; 1508 1509 /// \brief An assignment expression that will instantiate to the 1510 /// size of the array. 1511 /// 1512 /// The expression itself might be NULL, in which case the array 1513 /// type will have its size deduced from an initializer. 1514 Stmt *SizeExpr; 1515 1516 /// Brackets - The left and right array brackets. 1517 SourceRange Brackets; 1518 1519 DependentSizedArrayType(ASTContext &Context, QualType et, QualType can, 1520 Expr *e, ArraySizeModifier sm, unsigned tq, 1521 SourceRange brackets) 1522 : ArrayType(DependentSizedArray, et, can, sm, tq), 1523 Context(Context), SizeExpr((Stmt*) e), Brackets(brackets) {} 1524 friend class ASTContext; // ASTContext creates these. 1525 virtual void Destroy(ASTContext& C); 1526 1527public: 1528 Expr *getSizeExpr() const { 1529 // We use C-style casts instead of cast<> here because we do not wish 1530 // to have a dependency of Type.h on Stmt.h/Expr.h. 1531 return (Expr*) SizeExpr; 1532 } 1533 SourceRange getBracketsRange() const { return Brackets; } 1534 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1535 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1536 1537 bool isSugared() const { return false; } 1538 QualType desugar() const { return QualType(this, 0); } 1539 1540 static bool classof(const Type *T) { 1541 return T->getTypeClass() == DependentSizedArray; 1542 } 1543 static bool classof(const DependentSizedArrayType *) { return true; } 1544 1545 friend class StmtIteratorBase; 1546 1547 1548 void Profile(llvm::FoldingSetNodeID &ID) { 1549 Profile(ID, Context, getElementType(), 1550 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 1551 } 1552 1553 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1554 QualType ET, ArraySizeModifier SizeMod, 1555 unsigned TypeQuals, Expr *E); 1556}; 1557 1558/// DependentSizedExtVectorType - This type represent an extended vector type 1559/// where either the type or size is dependent. For example: 1560/// @code 1561/// template<typename T, int Size> 1562/// class vector { 1563/// typedef T __attribute__((ext_vector_type(Size))) type; 1564/// } 1565/// @endcode 1566class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 1567 ASTContext &Context; 1568 Expr *SizeExpr; 1569 /// ElementType - The element type of the array. 1570 QualType ElementType; 1571 SourceLocation loc; 1572 1573 DependentSizedExtVectorType(ASTContext &Context, QualType ElementType, 1574 QualType can, Expr *SizeExpr, SourceLocation loc) 1575 : Type (DependentSizedExtVector, can, true), 1576 Context(Context), SizeExpr(SizeExpr), ElementType(ElementType), 1577 loc(loc) {} 1578 friend class ASTContext; 1579 virtual void Destroy(ASTContext& C); 1580 1581public: 1582 Expr *getSizeExpr() const { return SizeExpr; } 1583 QualType getElementType() const { return ElementType; } 1584 SourceLocation getAttributeLoc() const { return loc; } 1585 1586 bool isSugared() const { return false; } 1587 QualType desugar() const { return QualType(this, 0); } 1588 1589 static bool classof(const Type *T) { 1590 return T->getTypeClass() == DependentSizedExtVector; 1591 } 1592 static bool classof(const DependentSizedExtVectorType *) { return true; } 1593 1594 void Profile(llvm::FoldingSetNodeID &ID) { 1595 Profile(ID, Context, getElementType(), getSizeExpr()); 1596 } 1597 1598 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1599 QualType ElementType, Expr *SizeExpr); 1600}; 1601 1602 1603/// VectorType - GCC generic vector type. This type is created using 1604/// __attribute__((vector_size(n)), where "n" specifies the vector size in 1605/// bytes; or from an Altivec __vector or vector declaration. 1606/// Since the constructor takes the number of vector elements, the 1607/// client is responsible for converting the size into the number of elements. 1608class VectorType : public Type, public llvm::FoldingSetNode { 1609protected: 1610 /// ElementType - The element type of the vector. 1611 QualType ElementType; 1612 1613 /// NumElements - The number of elements in the vector. 1614 unsigned NumElements; 1615 1616 /// AltiVec - True if this is for an Altivec vector. 1617 bool AltiVec; 1618 1619 /// Pixel - True if this is for an Altivec vector pixel. 1620 bool Pixel; 1621 1622 VectorType(QualType vecType, unsigned nElements, QualType canonType, 1623 bool isAltiVec, bool isPixel) : 1624 Type(Vector, canonType, vecType->isDependentType()), 1625 ElementType(vecType), NumElements(nElements), 1626 AltiVec(isAltiVec), Pixel(isPixel) {} 1627 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 1628 QualType canonType, bool isAltiVec, bool isPixel) 1629 : Type(tc, canonType, vecType->isDependentType()), ElementType(vecType), 1630 NumElements(nElements), AltiVec(isAltiVec), Pixel(isPixel) {} 1631 friend class ASTContext; // ASTContext creates these. 1632public: 1633 1634 QualType getElementType() const { return ElementType; } 1635 unsigned getNumElements() const { return NumElements; } 1636 1637 bool isSugared() const { return false; } 1638 QualType desugar() const { return QualType(this, 0); } 1639 1640 bool isAltiVec() const { return AltiVec; } 1641 1642 bool isPixel() const { return Pixel; } 1643 1644 void Profile(llvm::FoldingSetNodeID &ID) { 1645 Profile(ID, getElementType(), getNumElements(), getTypeClass(), 1646 AltiVec, Pixel); 1647 } 1648 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 1649 unsigned NumElements, TypeClass TypeClass, 1650 bool isAltiVec, bool isPixel) { 1651 ID.AddPointer(ElementType.getAsOpaquePtr()); 1652 ID.AddInteger(NumElements); 1653 ID.AddInteger(TypeClass); 1654 ID.AddBoolean(isAltiVec); 1655 ID.AddBoolean(isPixel); 1656 } 1657 1658 virtual Linkage getLinkage() const; 1659 1660 static bool classof(const Type *T) { 1661 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 1662 } 1663 static bool classof(const VectorType *) { return true; } 1664}; 1665 1666/// ExtVectorType - Extended vector type. This type is created using 1667/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 1668/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 1669/// class enables syntactic extensions, like Vector Components for accessing 1670/// points, colors, and textures (modeled after OpenGL Shading Language). 1671class ExtVectorType : public VectorType { 1672 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 1673 VectorType(ExtVector, vecType, nElements, canonType, false, false) {} 1674 friend class ASTContext; // ASTContext creates these. 1675public: 1676 static int getPointAccessorIdx(char c) { 1677 switch (c) { 1678 default: return -1; 1679 case 'x': return 0; 1680 case 'y': return 1; 1681 case 'z': return 2; 1682 case 'w': return 3; 1683 } 1684 } 1685 static int getNumericAccessorIdx(char c) { 1686 switch (c) { 1687 default: return -1; 1688 case '0': return 0; 1689 case '1': return 1; 1690 case '2': return 2; 1691 case '3': return 3; 1692 case '4': return 4; 1693 case '5': return 5; 1694 case '6': return 6; 1695 case '7': return 7; 1696 case '8': return 8; 1697 case '9': return 9; 1698 case 'A': 1699 case 'a': return 10; 1700 case 'B': 1701 case 'b': return 11; 1702 case 'C': 1703 case 'c': return 12; 1704 case 'D': 1705 case 'd': return 13; 1706 case 'E': 1707 case 'e': return 14; 1708 case 'F': 1709 case 'f': return 15; 1710 } 1711 } 1712 1713 static int getAccessorIdx(char c) { 1714 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 1715 return getNumericAccessorIdx(c); 1716 } 1717 1718 bool isAccessorWithinNumElements(char c) const { 1719 if (int idx = getAccessorIdx(c)+1) 1720 return unsigned(idx-1) < NumElements; 1721 return false; 1722 } 1723 bool isSugared() const { return false; } 1724 QualType desugar() const { return QualType(this, 0); } 1725 1726 static bool classof(const Type *T) { 1727 return T->getTypeClass() == ExtVector; 1728 } 1729 static bool classof(const ExtVectorType *) { return true; } 1730}; 1731 1732/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 1733/// class of FunctionNoProtoType and FunctionProtoType. 1734/// 1735class FunctionType : public Type { 1736 virtual void ANCHOR(); // Key function for FunctionType. 1737 1738 /// SubClassData - This field is owned by the subclass, put here to pack 1739 /// tightly with the ivars in Type. 1740 bool SubClassData : 1; 1741 1742 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1743 /// other bitfields. 1744 /// The qualifiers are part of FunctionProtoType because... 1745 /// 1746 /// C++ 8.3.5p4: The return type, the parameter type list and the 1747 /// cv-qualifier-seq, [...], are part of the function type. 1748 /// 1749 unsigned TypeQuals : 3; 1750 1751 /// NoReturn - Indicates if the function type is attribute noreturn. 1752 unsigned NoReturn : 1; 1753 1754 /// RegParm - How many arguments to pass inreg. 1755 unsigned RegParm : 3; 1756 1757 /// CallConv - The calling convention used by the function. 1758 unsigned CallConv : 2; 1759 1760 // The type returned by the function. 1761 QualType ResultType; 1762 1763 public: 1764 // This class is used for passing arround the information needed to 1765 // construct a call. It is not actually used for storage, just for 1766 // factoring together common arguments. 1767 // If you add a field (say Foo), other than the obvious places (both, constructors, 1768 // compile failures), what you need to update is 1769 // * Operetor== 1770 // * getFoo 1771 // * withFoo 1772 // * functionType. Add Foo, getFoo. 1773 // * ASTContext::getFooType 1774 // * ASTContext::mergeFunctionTypes 1775 // * FunctionNoProtoType::Profile 1776 // * FunctionProtoType::Profile 1777 // * TypePrinter::PrintFunctionProto 1778 // * PCH read and write 1779 // * Codegen 1780 1781 class ExtInfo { 1782 public: 1783 // Constructor with no defaults. Use this when you know that you 1784 // have all the elements (when reading a PCH file for example). 1785 ExtInfo(bool noReturn, unsigned regParm, CallingConv cc) : 1786 NoReturn(noReturn), RegParm(regParm), CC(cc) {} 1787 1788 // Constructor with all defaults. Use when for example creating a 1789 // function know to use defaults. 1790 ExtInfo() : NoReturn(false), RegParm(0), CC(CC_Default) {} 1791 1792 bool getNoReturn() const { return NoReturn; } 1793 unsigned getRegParm() const { return RegParm; } 1794 CallingConv getCC() const { return CC; } 1795 1796 bool operator==(const ExtInfo &Other) const { 1797 return getNoReturn() == Other.getNoReturn() && 1798 getRegParm() == Other.getRegParm() && 1799 getCC() == Other.getCC(); 1800 } 1801 bool operator!=(const ExtInfo &Other) const { 1802 return !(*this == Other); 1803 } 1804 1805 // Note that we don't have setters. That is by design, use 1806 // the following with methods instead of mutating these objects. 1807 1808 ExtInfo withNoReturn(bool noReturn) const { 1809 return ExtInfo(noReturn, getRegParm(), getCC()); 1810 } 1811 1812 ExtInfo withRegParm(unsigned RegParm) const { 1813 return ExtInfo(getNoReturn(), RegParm, getCC()); 1814 } 1815 1816 ExtInfo withCallingConv(CallingConv cc) const { 1817 return ExtInfo(getNoReturn(), getRegParm(), cc); 1818 } 1819 1820 private: 1821 // True if we have __attribute__((noreturn)) 1822 bool NoReturn; 1823 // The value passed to __attribute__((regparm(x))) 1824 unsigned RegParm; 1825 // The calling convention as specified via 1826 // __attribute__((cdecl|stdcall||fastcall)) 1827 CallingConv CC; 1828 }; 1829 1830protected: 1831 FunctionType(TypeClass tc, QualType res, bool SubclassInfo, 1832 unsigned typeQuals, QualType Canonical, bool Dependent, 1833 const ExtInfo &Info) 1834 : Type(tc, Canonical, Dependent), 1835 SubClassData(SubclassInfo), TypeQuals(typeQuals), 1836 NoReturn(Info.getNoReturn()), 1837 RegParm(Info.getRegParm()), CallConv(Info.getCC()), ResultType(res) {} 1838 bool getSubClassData() const { return SubClassData; } 1839 unsigned getTypeQuals() const { return TypeQuals; } 1840public: 1841 1842 QualType getResultType() const { return ResultType; } 1843 unsigned getRegParmType() const { return RegParm; } 1844 bool getNoReturnAttr() const { return NoReturn; } 1845 CallingConv getCallConv() const { return (CallingConv)CallConv; } 1846 ExtInfo getExtInfo() const { 1847 return ExtInfo(NoReturn, RegParm, (CallingConv)CallConv); 1848 } 1849 1850 static llvm::StringRef getNameForCallConv(CallingConv CC); 1851 1852 static bool classof(const Type *T) { 1853 return T->getTypeClass() == FunctionNoProto || 1854 T->getTypeClass() == FunctionProto; 1855 } 1856 static bool classof(const FunctionType *) { return true; } 1857}; 1858 1859/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 1860/// no information available about its arguments. 1861class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 1862 FunctionNoProtoType(QualType Result, QualType Canonical, 1863 const ExtInfo &Info) 1864 : FunctionType(FunctionNoProto, Result, false, 0, Canonical, 1865 /*Dependent=*/false, Info) {} 1866 friend class ASTContext; // ASTContext creates these. 1867public: 1868 // No additional state past what FunctionType provides. 1869 1870 bool isSugared() const { return false; } 1871 QualType desugar() const { return QualType(this, 0); } 1872 1873 void Profile(llvm::FoldingSetNodeID &ID) { 1874 Profile(ID, getResultType(), getExtInfo()); 1875 } 1876 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 1877 const ExtInfo &Info) { 1878 ID.AddInteger(Info.getCC()); 1879 ID.AddInteger(Info.getRegParm()); 1880 ID.AddInteger(Info.getNoReturn()); 1881 ID.AddPointer(ResultType.getAsOpaquePtr()); 1882 } 1883 1884 virtual Linkage getLinkage() const; 1885 1886 static bool classof(const Type *T) { 1887 return T->getTypeClass() == FunctionNoProto; 1888 } 1889 static bool classof(const FunctionNoProtoType *) { return true; } 1890}; 1891 1892/// FunctionProtoType - Represents a prototype with argument type info, e.g. 1893/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 1894/// arguments, not as having a single void argument. Such a type can have an 1895/// exception specification, but this specification is not part of the canonical 1896/// type. 1897class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 1898 /// hasAnyDependentType - Determine whether there are any dependent 1899 /// types within the arguments passed in. 1900 static bool hasAnyDependentType(const QualType *ArgArray, unsigned numArgs) { 1901 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 1902 if (ArgArray[Idx]->isDependentType()) 1903 return true; 1904 1905 return false; 1906 } 1907 1908 FunctionProtoType(QualType Result, const QualType *ArgArray, unsigned numArgs, 1909 bool isVariadic, unsigned typeQuals, bool hasExs, 1910 bool hasAnyExs, const QualType *ExArray, 1911 unsigned numExs, QualType Canonical, 1912 const ExtInfo &Info) 1913 : FunctionType(FunctionProto, Result, isVariadic, typeQuals, Canonical, 1914 (Result->isDependentType() || 1915 hasAnyDependentType(ArgArray, numArgs)), 1916 Info), 1917 NumArgs(numArgs), NumExceptions(numExs), HasExceptionSpec(hasExs), 1918 AnyExceptionSpec(hasAnyExs) { 1919 // Fill in the trailing argument array. 1920 QualType *ArgInfo = reinterpret_cast<QualType*>(this+1); 1921 for (unsigned i = 0; i != numArgs; ++i) 1922 ArgInfo[i] = ArgArray[i]; 1923 // Fill in the exception array. 1924 QualType *Ex = ArgInfo + numArgs; 1925 for (unsigned i = 0; i != numExs; ++i) 1926 Ex[i] = ExArray[i]; 1927 } 1928 1929 /// NumArgs - The number of arguments this function has, not counting '...'. 1930 unsigned NumArgs : 20; 1931 1932 /// NumExceptions - The number of types in the exception spec, if any. 1933 unsigned NumExceptions : 10; 1934 1935 /// HasExceptionSpec - Whether this function has an exception spec at all. 1936 bool HasExceptionSpec : 1; 1937 1938 /// AnyExceptionSpec - Whether this function has a throw(...) spec. 1939 bool AnyExceptionSpec : 1; 1940 1941 /// ArgInfo - There is an variable size array after the class in memory that 1942 /// holds the argument types. 1943 1944 /// Exceptions - There is another variable size array after ArgInfo that 1945 /// holds the exception types. 1946 1947 friend class ASTContext; // ASTContext creates these. 1948 1949public: 1950 unsigned getNumArgs() const { return NumArgs; } 1951 QualType getArgType(unsigned i) const { 1952 assert(i < NumArgs && "Invalid argument number!"); 1953 return arg_type_begin()[i]; 1954 } 1955 1956 bool hasExceptionSpec() const { return HasExceptionSpec; } 1957 bool hasAnyExceptionSpec() const { return AnyExceptionSpec; } 1958 unsigned getNumExceptions() const { return NumExceptions; } 1959 QualType getExceptionType(unsigned i) const { 1960 assert(i < NumExceptions && "Invalid exception number!"); 1961 return exception_begin()[i]; 1962 } 1963 bool hasEmptyExceptionSpec() const { 1964 return hasExceptionSpec() && !hasAnyExceptionSpec() && 1965 getNumExceptions() == 0; 1966 } 1967 1968 bool isVariadic() const { return getSubClassData(); } 1969 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 1970 1971 typedef const QualType *arg_type_iterator; 1972 arg_type_iterator arg_type_begin() const { 1973 return reinterpret_cast<const QualType *>(this+1); 1974 } 1975 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 1976 1977 typedef const QualType *exception_iterator; 1978 exception_iterator exception_begin() const { 1979 // exceptions begin where arguments end 1980 return arg_type_end(); 1981 } 1982 exception_iterator exception_end() const { 1983 return exception_begin() + NumExceptions; 1984 } 1985 1986 bool isSugared() const { return false; } 1987 QualType desugar() const { return QualType(this, 0); } 1988 1989 virtual Linkage getLinkage() const; 1990 1991 static bool classof(const Type *T) { 1992 return T->getTypeClass() == FunctionProto; 1993 } 1994 static bool classof(const FunctionProtoType *) { return true; } 1995 1996 void Profile(llvm::FoldingSetNodeID &ID); 1997 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 1998 arg_type_iterator ArgTys, unsigned NumArgs, 1999 bool isVariadic, unsigned TypeQuals, 2000 bool hasExceptionSpec, bool anyExceptionSpec, 2001 unsigned NumExceptions, exception_iterator Exs, 2002 const ExtInfo &ExtInfo); 2003}; 2004 2005 2006/// \brief Represents the dependent type named by a dependently-scoped 2007/// typename using declaration, e.g. 2008/// using typename Base<T>::foo; 2009/// Template instantiation turns these into the underlying type. 2010class UnresolvedUsingType : public Type { 2011 UnresolvedUsingTypenameDecl *Decl; 2012 2013 UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) 2014 : Type(UnresolvedUsing, QualType(), true), 2015 Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} 2016 friend class ASTContext; // ASTContext creates these. 2017public: 2018 2019 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 2020 2021 bool isSugared() const { return false; } 2022 QualType desugar() const { return QualType(this, 0); } 2023 2024 static bool classof(const Type *T) { 2025 return T->getTypeClass() == UnresolvedUsing; 2026 } 2027 static bool classof(const UnresolvedUsingType *) { return true; } 2028 2029 void Profile(llvm::FoldingSetNodeID &ID) { 2030 return Profile(ID, Decl); 2031 } 2032 static void Profile(llvm::FoldingSetNodeID &ID, 2033 UnresolvedUsingTypenameDecl *D) { 2034 ID.AddPointer(D); 2035 } 2036}; 2037 2038 2039class TypedefType : public Type { 2040 TypedefDecl *Decl; 2041protected: 2042 TypedefType(TypeClass tc, const TypedefDecl *D, QualType can) 2043 : Type(tc, can, can->isDependentType()), 2044 Decl(const_cast<TypedefDecl*>(D)) { 2045 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2046 } 2047 friend class ASTContext; // ASTContext creates these. 2048public: 2049 2050 TypedefDecl *getDecl() const { return Decl; } 2051 2052 /// LookThroughTypedefs - Return the ultimate type this typedef corresponds to 2053 /// potentially looking through *all* consecutive typedefs. This returns the 2054 /// sum of the type qualifiers, so if you have: 2055 /// typedef const int A; 2056 /// typedef volatile A B; 2057 /// looking through the typedefs for B will give you "const volatile A". 2058 QualType LookThroughTypedefs() const; 2059 2060 bool isSugared() const { return true; } 2061 QualType desugar() const; 2062 2063 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 2064 static bool classof(const TypedefType *) { return true; } 2065}; 2066 2067/// TypeOfExprType (GCC extension). 2068class TypeOfExprType : public Type { 2069 Expr *TOExpr; 2070 2071protected: 2072 TypeOfExprType(Expr *E, QualType can = QualType()); 2073 friend class ASTContext; // ASTContext creates these. 2074public: 2075 Expr *getUnderlyingExpr() const { return TOExpr; } 2076 2077 /// \brief Remove a single level of sugar. 2078 QualType desugar() const; 2079 2080 /// \brief Returns whether this type directly provides sugar. 2081 bool isSugared() const { return true; } 2082 2083 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 2084 static bool classof(const TypeOfExprType *) { return true; } 2085}; 2086 2087/// \brief Internal representation of canonical, dependent 2088/// typeof(expr) types. 2089/// 2090/// This class is used internally by the ASTContext to manage 2091/// canonical, dependent types, only. Clients will only see instances 2092/// of this class via TypeOfExprType nodes. 2093class DependentTypeOfExprType 2094 : public TypeOfExprType, public llvm::FoldingSetNode { 2095 ASTContext &Context; 2096 2097public: 2098 DependentTypeOfExprType(ASTContext &Context, Expr *E) 2099 : TypeOfExprType(E), Context(Context) { } 2100 2101 bool isSugared() const { return false; } 2102 QualType desugar() const { return QualType(this, 0); } 2103 2104 void Profile(llvm::FoldingSetNodeID &ID) { 2105 Profile(ID, Context, getUnderlyingExpr()); 2106 } 2107 2108 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2109 Expr *E); 2110}; 2111 2112/// TypeOfType (GCC extension). 2113class TypeOfType : public Type { 2114 QualType TOType; 2115 TypeOfType(QualType T, QualType can) 2116 : Type(TypeOf, can, T->isDependentType()), TOType(T) { 2117 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2118 } 2119 friend class ASTContext; // ASTContext creates these. 2120public: 2121 QualType getUnderlyingType() const { return TOType; } 2122 2123 /// \brief Remove a single level of sugar. 2124 QualType desugar() const { return getUnderlyingType(); } 2125 2126 /// \brief Returns whether this type directly provides sugar. 2127 bool isSugared() const { return true; } 2128 2129 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 2130 static bool classof(const TypeOfType *) { return true; } 2131}; 2132 2133/// DecltypeType (C++0x) 2134class DecltypeType : public Type { 2135 Expr *E; 2136 2137 // FIXME: We could get rid of UnderlyingType if we wanted to: We would have to 2138 // Move getDesugaredType to ASTContext so that it can call getDecltypeForExpr 2139 // from it. 2140 QualType UnderlyingType; 2141 2142protected: 2143 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 2144 friend class ASTContext; // ASTContext creates these. 2145public: 2146 Expr *getUnderlyingExpr() const { return E; } 2147 QualType getUnderlyingType() const { return UnderlyingType; } 2148 2149 /// \brief Remove a single level of sugar. 2150 QualType desugar() const { return getUnderlyingType(); } 2151 2152 /// \brief Returns whether this type directly provides sugar. 2153 bool isSugared() const { return !isDependentType(); } 2154 2155 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 2156 static bool classof(const DecltypeType *) { return true; } 2157}; 2158 2159/// \brief Internal representation of canonical, dependent 2160/// decltype(expr) types. 2161/// 2162/// This class is used internally by the ASTContext to manage 2163/// canonical, dependent types, only. Clients will only see instances 2164/// of this class via DecltypeType nodes. 2165class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 2166 ASTContext &Context; 2167 2168public: 2169 DependentDecltypeType(ASTContext &Context, Expr *E); 2170 2171 bool isSugared() const { return false; } 2172 QualType desugar() const { return QualType(this, 0); } 2173 2174 void Profile(llvm::FoldingSetNodeID &ID) { 2175 Profile(ID, Context, getUnderlyingExpr()); 2176 } 2177 2178 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2179 Expr *E); 2180}; 2181 2182class TagType : public Type { 2183 /// Stores the TagDecl associated with this type. The decl will 2184 /// point to the TagDecl that actually defines the entity (or is a 2185 /// definition in progress), if there is such a definition. The 2186 /// single-bit value will be non-zero when this tag is in the 2187 /// process of being defined. 2188 mutable llvm::PointerIntPair<TagDecl *, 1> decl; 2189 friend class ASTContext; 2190 friend class TagDecl; 2191 2192protected: 2193 TagType(TypeClass TC, const TagDecl *D, QualType can); 2194 2195public: 2196 TagDecl *getDecl() const { return decl.getPointer(); } 2197 2198 /// @brief Determines whether this type is in the process of being 2199 /// defined. 2200 bool isBeingDefined() const { return decl.getInt(); } 2201 void setBeingDefined(bool Def) const { decl.setInt(Def? 1 : 0); } 2202 2203 virtual Linkage getLinkage() const; 2204 2205 static bool classof(const Type *T) { 2206 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 2207 } 2208 static bool classof(const TagType *) { return true; } 2209 static bool classof(const RecordType *) { return true; } 2210 static bool classof(const EnumType *) { return true; } 2211}; 2212 2213/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 2214/// to detect TagType objects of structs/unions/classes. 2215class RecordType : public TagType { 2216protected: 2217 explicit RecordType(const RecordDecl *D) 2218 : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2219 explicit RecordType(TypeClass TC, RecordDecl *D) 2220 : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2221 friend class ASTContext; // ASTContext creates these. 2222public: 2223 2224 RecordDecl *getDecl() const { 2225 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 2226 } 2227 2228 // FIXME: This predicate is a helper to QualType/Type. It needs to 2229 // recursively check all fields for const-ness. If any field is declared 2230 // const, it needs to return false. 2231 bool hasConstFields() const { return false; } 2232 2233 // FIXME: RecordType needs to check when it is created that all fields are in 2234 // the same address space, and return that. 2235 unsigned getAddressSpace() const { return 0; } 2236 2237 bool isSugared() const { return false; } 2238 QualType desugar() const { return QualType(this, 0); } 2239 2240 static bool classof(const TagType *T); 2241 static bool classof(const Type *T) { 2242 return isa<TagType>(T) && classof(cast<TagType>(T)); 2243 } 2244 static bool classof(const RecordType *) { return true; } 2245}; 2246 2247/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 2248/// to detect TagType objects of enums. 2249class EnumType : public TagType { 2250 explicit EnumType(const EnumDecl *D) 2251 : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2252 friend class ASTContext; // ASTContext creates these. 2253public: 2254 2255 EnumDecl *getDecl() const { 2256 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 2257 } 2258 2259 bool isSugared() const { return false; } 2260 QualType desugar() const { return QualType(this, 0); } 2261 2262 static bool classof(const TagType *T); 2263 static bool classof(const Type *T) { 2264 return isa<TagType>(T) && classof(cast<TagType>(T)); 2265 } 2266 static bool classof(const EnumType *) { return true; } 2267}; 2268 2269class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2270 unsigned Depth : 15; 2271 unsigned Index : 16; 2272 unsigned ParameterPack : 1; 2273 IdentifierInfo *Name; 2274 2275 TemplateTypeParmType(unsigned D, unsigned I, bool PP, IdentifierInfo *N, 2276 QualType Canon) 2277 : Type(TemplateTypeParm, Canon, /*Dependent=*/true), 2278 Depth(D), Index(I), ParameterPack(PP), Name(N) { } 2279 2280 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 2281 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true), 2282 Depth(D), Index(I), ParameterPack(PP), Name(0) { } 2283 2284 friend class ASTContext; // ASTContext creates these 2285 2286public: 2287 unsigned getDepth() const { return Depth; } 2288 unsigned getIndex() const { return Index; } 2289 bool isParameterPack() const { return ParameterPack; } 2290 IdentifierInfo *getName() const { return Name; } 2291 2292 bool isSugared() const { return false; } 2293 QualType desugar() const { return QualType(this, 0); } 2294 2295 void Profile(llvm::FoldingSetNodeID &ID) { 2296 Profile(ID, Depth, Index, ParameterPack, Name); 2297 } 2298 2299 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 2300 unsigned Index, bool ParameterPack, 2301 IdentifierInfo *Name) { 2302 ID.AddInteger(Depth); 2303 ID.AddInteger(Index); 2304 ID.AddBoolean(ParameterPack); 2305 ID.AddPointer(Name); 2306 } 2307 2308 static bool classof(const Type *T) { 2309 return T->getTypeClass() == TemplateTypeParm; 2310 } 2311 static bool classof(const TemplateTypeParmType *T) { return true; } 2312}; 2313 2314/// \brief Represents the result of substituting a type for a template 2315/// type parameter. 2316/// 2317/// Within an instantiated template, all template type parameters have 2318/// been replaced with these. They are used solely to record that a 2319/// type was originally written as a template type parameter; 2320/// therefore they are never canonical. 2321class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2322 // The original type parameter. 2323 const TemplateTypeParmType *Replaced; 2324 2325 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 2326 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType()), 2327 Replaced(Param) { } 2328 2329 friend class ASTContext; 2330 2331public: 2332 IdentifierInfo *getName() const { return Replaced->getName(); } 2333 2334 /// Gets the template parameter that was substituted for. 2335 const TemplateTypeParmType *getReplacedParameter() const { 2336 return Replaced; 2337 } 2338 2339 /// Gets the type that was substituted for the template 2340 /// parameter. 2341 QualType getReplacementType() const { 2342 return getCanonicalTypeInternal(); 2343 } 2344 2345 bool isSugared() const { return true; } 2346 QualType desugar() const { return getReplacementType(); } 2347 2348 void Profile(llvm::FoldingSetNodeID &ID) { 2349 Profile(ID, getReplacedParameter(), getReplacementType()); 2350 } 2351 static void Profile(llvm::FoldingSetNodeID &ID, 2352 const TemplateTypeParmType *Replaced, 2353 QualType Replacement) { 2354 ID.AddPointer(Replaced); 2355 ID.AddPointer(Replacement.getAsOpaquePtr()); 2356 } 2357 2358 static bool classof(const Type *T) { 2359 return T->getTypeClass() == SubstTemplateTypeParm; 2360 } 2361 static bool classof(const SubstTemplateTypeParmType *T) { return true; } 2362}; 2363 2364/// \brief Represents the type of a template specialization as written 2365/// in the source code. 2366/// 2367/// Template specialization types represent the syntactic form of a 2368/// template-id that refers to a type, e.g., @c vector<int>. Some 2369/// template specialization types are syntactic sugar, whose canonical 2370/// type will point to some other type node that represents the 2371/// instantiation or class template specialization. For example, a 2372/// class template specialization type of @c vector<int> will refer to 2373/// a tag type for the instantiation 2374/// @c std::vector<int, std::allocator<int>>. 2375/// 2376/// Other template specialization types, for which the template name 2377/// is dependent, may be canonical types. These types are always 2378/// dependent. 2379class TemplateSpecializationType 2380 : public Type, public llvm::FoldingSetNode { 2381 2382 // The ASTContext is currently needed in order to profile expressions. 2383 // FIXME: avoid this. 2384 // 2385 // The bool is whether this is a current instantiation. 2386 llvm::PointerIntPair<ASTContext*, 1, bool> ContextAndCurrentInstantiation; 2387 2388 /// \brief The name of the template being specialized. 2389 TemplateName Template; 2390 2391 /// \brief - The number of template arguments named in this class 2392 /// template specialization. 2393 unsigned NumArgs; 2394 2395 TemplateSpecializationType(ASTContext &Context, 2396 TemplateName T, 2397 bool IsCurrentInstantiation, 2398 const TemplateArgument *Args, 2399 unsigned NumArgs, QualType Canon); 2400 2401 virtual void Destroy(ASTContext& C); 2402 2403 friend class ASTContext; // ASTContext creates these 2404 2405public: 2406 /// \brief Determine whether any of the given template arguments are 2407 /// dependent. 2408 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 2409 unsigned NumArgs); 2410 2411 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 2412 unsigned NumArgs); 2413 2414 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &); 2415 2416 /// \brief Print a template argument list, including the '<' and '>' 2417 /// enclosing the template arguments. 2418 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 2419 unsigned NumArgs, 2420 const PrintingPolicy &Policy); 2421 2422 static std::string PrintTemplateArgumentList(const TemplateArgumentLoc *Args, 2423 unsigned NumArgs, 2424 const PrintingPolicy &Policy); 2425 2426 static std::string PrintTemplateArgumentList(const TemplateArgumentListInfo &, 2427 const PrintingPolicy &Policy); 2428 2429 /// True if this template specialization type matches a current 2430 /// instantiation in the context in which it is found. 2431 bool isCurrentInstantiation() const { 2432 return ContextAndCurrentInstantiation.getInt(); 2433 } 2434 2435 typedef const TemplateArgument * iterator; 2436 2437 iterator begin() const { return getArgs(); } 2438 iterator end() const; 2439 2440 /// \brief Retrieve the name of the template that we are specializing. 2441 TemplateName getTemplateName() const { return Template; } 2442 2443 /// \brief Retrieve the template arguments. 2444 const TemplateArgument *getArgs() const { 2445 return reinterpret_cast<const TemplateArgument *>(this + 1); 2446 } 2447 2448 /// \brief Retrieve the number of template arguments. 2449 unsigned getNumArgs() const { return NumArgs; } 2450 2451 /// \brief Retrieve a specific template argument as a type. 2452 /// \precondition @c isArgType(Arg) 2453 const TemplateArgument &getArg(unsigned Idx) const; 2454 2455 bool isSugared() const { 2456 return !isDependentType() || isCurrentInstantiation(); 2457 } 2458 QualType desugar() const { return getCanonicalTypeInternal(); } 2459 2460 void Profile(llvm::FoldingSetNodeID &ID) { 2461 Profile(ID, Template, isCurrentInstantiation(), getArgs(), NumArgs, 2462 *ContextAndCurrentInstantiation.getPointer()); 2463 } 2464 2465 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 2466 bool IsCurrentInstantiation, 2467 const TemplateArgument *Args, 2468 unsigned NumArgs, 2469 ASTContext &Context); 2470 2471 static bool classof(const Type *T) { 2472 return T->getTypeClass() == TemplateSpecialization; 2473 } 2474 static bool classof(const TemplateSpecializationType *T) { return true; } 2475}; 2476 2477/// \brief The injected class name of a C++ class template or class 2478/// template partial specialization. Used to record that a type was 2479/// spelled with a bare identifier rather than as a template-id; the 2480/// equivalent for non-templated classes is just RecordType. 2481/// 2482/// Injected class name types are always dependent. Template 2483/// instantiation turns these into RecordTypes. 2484/// 2485/// Injected class name types are always canonical. This works 2486/// because it is impossible to compare an injected class name type 2487/// with the corresponding non-injected template type, for the same 2488/// reason that it is impossible to directly compare template 2489/// parameters from different dependent contexts: injected class name 2490/// types can only occur within the scope of a particular templated 2491/// declaration, and within that scope every template specialization 2492/// will canonicalize to the injected class name (when appropriate 2493/// according to the rules of the language). 2494class InjectedClassNameType : public Type { 2495 CXXRecordDecl *Decl; 2496 2497 /// The template specialization which this type represents. 2498 /// For example, in 2499 /// template <class T> class A { ... }; 2500 /// this is A<T>, whereas in 2501 /// template <class X, class Y> class A<B<X,Y> > { ... }; 2502 /// this is A<B<X,Y> >. 2503 /// 2504 /// It is always unqualified, always a template specialization type, 2505 /// and always dependent. 2506 QualType InjectedType; 2507 2508 friend class ASTContext; // ASTContext creates these. 2509 friend class TagDecl; // TagDecl mutilates the Decl 2510 InjectedClassNameType(CXXRecordDecl *D, QualType TST) 2511 : Type(InjectedClassName, QualType(), true), 2512 Decl(D), InjectedType(TST) { 2513 assert(isa<TemplateSpecializationType>(TST)); 2514 assert(!TST.hasQualifiers()); 2515 assert(TST->isDependentType()); 2516 } 2517 2518public: 2519 QualType getInjectedSpecializationType() const { return InjectedType; } 2520 const TemplateSpecializationType *getInjectedTST() const { 2521 return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); 2522 } 2523 2524 CXXRecordDecl *getDecl() const { return Decl; } 2525 2526 bool isSugared() const { return false; } 2527 QualType desugar() const { return QualType(this, 0); } 2528 2529 static bool classof(const Type *T) { 2530 return T->getTypeClass() == InjectedClassName; 2531 } 2532 static bool classof(const InjectedClassNameType *T) { return true; } 2533}; 2534 2535/// \brief The kind of a tag type. 2536enum TagTypeKind { 2537 /// \brief The "struct" keyword. 2538 TTK_Struct, 2539 /// \brief The "union" keyword. 2540 TTK_Union, 2541 /// \brief The "class" keyword. 2542 TTK_Class, 2543 /// \brief The "enum" keyword. 2544 TTK_Enum 2545}; 2546 2547/// \brief The elaboration keyword that precedes a qualified type name or 2548/// introduces an elaborated-type-specifier. 2549enum ElaboratedTypeKeyword { 2550 /// \brief The "struct" keyword introduces the elaborated-type-specifier. 2551 ETK_Struct, 2552 /// \brief The "union" keyword introduces the elaborated-type-specifier. 2553 ETK_Union, 2554 /// \brief The "class" keyword introduces the elaborated-type-specifier. 2555 ETK_Class, 2556 /// \brief The "enum" keyword introduces the elaborated-type-specifier. 2557 ETK_Enum, 2558 /// \brief The "typename" keyword precedes the qualified type name, e.g., 2559 /// \c typename T::type. 2560 ETK_Typename, 2561 /// \brief No keyword precedes the qualified type name. 2562 ETK_None 2563}; 2564 2565/// A helper class for Type nodes having an ElaboratedTypeKeyword. 2566/// The keyword in stored in the free bits of the base class. 2567/// Also provides a few static helpers for converting and printing 2568/// elaborated type keyword and tag type kind enumerations. 2569class TypeWithKeyword : public Type { 2570 /// Keyword - Encodes an ElaboratedTypeKeyword enumeration constant. 2571 unsigned Keyword : 3; 2572 2573protected: 2574 TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, 2575 QualType Canonical, bool dependent) 2576 : Type(tc, Canonical, dependent), Keyword(Keyword) {} 2577 2578public: 2579 virtual ~TypeWithKeyword(); // pin vtable to Type.cpp 2580 2581 ElaboratedTypeKeyword getKeyword() const { 2582 return static_cast<ElaboratedTypeKeyword>(Keyword); 2583 } 2584 2585 /// getKeywordForTypeSpec - Converts a type specifier (DeclSpec::TST) 2586 /// into an elaborated type keyword. 2587 static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); 2588 2589 /// getTagTypeKindForTypeSpec - Converts a type specifier (DeclSpec::TST) 2590 /// into a tag type kind. It is an error to provide a type specifier 2591 /// which *isn't* a tag kind here. 2592 static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); 2593 2594 /// getKeywordForTagDeclKind - Converts a TagTypeKind into an 2595 /// elaborated type keyword. 2596 static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); 2597 2598 /// getTagTypeKindForKeyword - Converts an elaborated type keyword into 2599 // a TagTypeKind. It is an error to provide an elaborated type keyword 2600 /// which *isn't* a tag kind here. 2601 static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); 2602 2603 static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); 2604 2605 static const char *getKeywordName(ElaboratedTypeKeyword Keyword); 2606 2607 static const char *getTagTypeKindName(TagTypeKind Kind) { 2608 return getKeywordName(getKeywordForTagTypeKind(Kind)); 2609 } 2610 2611 class CannotCastToThisType {}; 2612 static CannotCastToThisType classof(const Type *); 2613}; 2614 2615/// \brief Represents a type that was referred to using an elaborated type 2616/// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, 2617/// or both. 2618/// 2619/// This type is used to keep track of a type name as written in the 2620/// source code, including tag keywords and any nested-name-specifiers. 2621/// The type itself is always "sugar", used to express what was written 2622/// in the source code but containing no additional semantic information. 2623class ElaboratedType : public TypeWithKeyword, public llvm::FoldingSetNode { 2624 2625 /// \brief The nested name specifier containing the qualifier. 2626 NestedNameSpecifier *NNS; 2627 2628 /// \brief The type that this qualified name refers to. 2629 QualType NamedType; 2630 2631 ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 2632 QualType NamedType, QualType CanonType) 2633 : TypeWithKeyword(Keyword, Elaborated, CanonType, 2634 NamedType->isDependentType()), 2635 NNS(NNS), NamedType(NamedType) { 2636 assert(!(Keyword == ETK_None && NNS == 0) && 2637 "ElaboratedType cannot have elaborated type keyword " 2638 "and name qualifier both null."); 2639 } 2640 2641 friend class ASTContext; // ASTContext creates these 2642 2643public: 2644 2645 /// \brief Retrieve the qualification on this type. 2646 NestedNameSpecifier *getQualifier() const { return NNS; } 2647 2648 /// \brief Retrieve the type named by the qualified-id. 2649 QualType getNamedType() const { return NamedType; } 2650 2651 /// \brief Remove a single level of sugar. 2652 QualType desugar() const { return getNamedType(); } 2653 2654 /// \brief Returns whether this type directly provides sugar. 2655 bool isSugared() const { return true; } 2656 2657 void Profile(llvm::FoldingSetNodeID &ID) { 2658 Profile(ID, getKeyword(), NNS, NamedType); 2659 } 2660 2661 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 2662 NestedNameSpecifier *NNS, QualType NamedType) { 2663 ID.AddInteger(Keyword); 2664 ID.AddPointer(NNS); 2665 NamedType.Profile(ID); 2666 } 2667 2668 static bool classof(const Type *T) { 2669 return T->getTypeClass() == Elaborated; 2670 } 2671 static bool classof(const ElaboratedType *T) { return true; } 2672}; 2673 2674/// \brief Represents a qualified type name for which the type name is 2675/// dependent. 2676/// 2677/// DependentNameType represents a class of dependent types that involve a 2678/// dependent nested-name-specifier (e.g., "T::") followed by a (dependent) 2679/// name of a type. The DependentNameType may start with a "typename" (for a 2680/// typename-specifier), "class", "struct", "union", or "enum" (for a 2681/// dependent elaborated-type-specifier), or nothing (in contexts where we 2682/// know that we must be referring to a type, e.g., in a base class specifier). 2683class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { 2684 2685 /// \brief The nested name specifier containing the qualifier. 2686 NestedNameSpecifier *NNS; 2687 2688 typedef llvm::PointerUnion<const IdentifierInfo *, 2689 const TemplateSpecializationType *> NameType; 2690 2691 /// \brief The type that this typename specifier refers to. 2692 NameType Name; 2693 2694 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 2695 const IdentifierInfo *Name, QualType CanonType) 2696 : TypeWithKeyword(Keyword, DependentName, CanonType, true), 2697 NNS(NNS), Name(Name) { 2698 assert(NNS->isDependent() && 2699 "DependentNameType requires a dependent nested-name-specifier"); 2700 } 2701 2702 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 2703 const TemplateSpecializationType *Ty, QualType CanonType) 2704 : TypeWithKeyword(Keyword, DependentName, CanonType, true), 2705 NNS(NNS), Name(Ty) { 2706 assert(NNS->isDependent() && 2707 "DependentNameType requires a dependent nested-name-specifier"); 2708 } 2709 2710 friend class ASTContext; // ASTContext creates these 2711 2712public: 2713 2714 /// \brief Retrieve the qualification on this type. 2715 NestedNameSpecifier *getQualifier() const { return NNS; } 2716 2717 /// \brief Retrieve the type named by the typename specifier as an 2718 /// identifier. 2719 /// 2720 /// This routine will return a non-NULL identifier pointer when the 2721 /// form of the original typename was terminated by an identifier, 2722 /// e.g., "typename T::type". 2723 const IdentifierInfo *getIdentifier() const { 2724 return Name.dyn_cast<const IdentifierInfo *>(); 2725 } 2726 2727 /// \brief Retrieve the type named by the typename specifier as a 2728 /// type specialization. 2729 const TemplateSpecializationType *getTemplateId() const { 2730 return Name.dyn_cast<const TemplateSpecializationType *>(); 2731 } 2732 2733 bool isSugared() const { return false; } 2734 QualType desugar() const { return QualType(this, 0); } 2735 2736 void Profile(llvm::FoldingSetNodeID &ID) { 2737 Profile(ID, getKeyword(), NNS, Name); 2738 } 2739 2740 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 2741 NestedNameSpecifier *NNS, NameType Name) { 2742 ID.AddInteger(Keyword); 2743 ID.AddPointer(NNS); 2744 ID.AddPointer(Name.getOpaqueValue()); 2745 } 2746 2747 static bool classof(const Type *T) { 2748 return T->getTypeClass() == DependentName; 2749 } 2750 static bool classof(const DependentNameType *T) { return true; } 2751}; 2752 2753/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 2754/// object oriented design. They basically correspond to C++ classes. There 2755/// are two kinds of interface types, normal interfaces like "NSString" and 2756/// qualified interfaces, which are qualified with a protocol list like 2757/// "NSString<NSCopyable, NSAmazing>". 2758class ObjCInterfaceType : public Type, public llvm::FoldingSetNode { 2759 ObjCInterfaceDecl *Decl; 2760 2761 /// \brief The number of protocols stored after the ObjCInterfaceType node. 2762 /// The list of protocols is sorted on protocol name. No protocol is enterred 2763 /// more than once. 2764 unsigned NumProtocols; 2765 2766 ObjCInterfaceType(QualType Canonical, ObjCInterfaceDecl *D, 2767 ObjCProtocolDecl **Protos, unsigned NumP); 2768 friend class ASTContext; // ASTContext creates these. 2769public: 2770 void Destroy(ASTContext& C); 2771 2772 ObjCInterfaceDecl *getDecl() const { return Decl; } 2773 2774 /// getNumProtocols - Return the number of qualifying protocols in this 2775 /// interface type, or 0 if there are none. 2776 unsigned getNumProtocols() const { return NumProtocols; } 2777 2778 /// \brief Retrieve the Ith protocol. 2779 ObjCProtocolDecl *getProtocol(unsigned I) const { 2780 assert(I < getNumProtocols() && "Out-of-range protocol access"); 2781 return qual_begin()[I]; 2782 } 2783 2784 /// qual_iterator and friends: this provides access to the (potentially empty) 2785 /// list of protocols qualifying this interface. 2786 typedef ObjCProtocolDecl* const * qual_iterator; 2787 qual_iterator qual_begin() const { 2788 return reinterpret_cast<qual_iterator>(this + 1); 2789 } 2790 qual_iterator qual_end() const { 2791 return qual_begin() + NumProtocols; 2792 } 2793 bool qual_empty() const { return NumProtocols == 0; } 2794 2795 bool isSugared() const { return false; } 2796 QualType desugar() const { return QualType(this, 0); } 2797 2798 void Profile(llvm::FoldingSetNodeID &ID); 2799 static void Profile(llvm::FoldingSetNodeID &ID, 2800 const ObjCInterfaceDecl *Decl, 2801 ObjCProtocolDecl * const *protocols, 2802 unsigned NumProtocols); 2803 2804 virtual Linkage getLinkage() const; 2805 2806 static bool classof(const Type *T) { 2807 return T->getTypeClass() == ObjCInterface; 2808 } 2809 static bool classof(const ObjCInterfaceType *) { return true; } 2810}; 2811 2812/// ObjCObjectPointerType - Used to represent 'id', 'Interface *', 'id <p>', 2813/// and 'Interface <p> *'. 2814/// 2815/// Duplicate protocols are removed and protocol list is canonicalized to be in 2816/// alphabetical order. 2817class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 2818 QualType PointeeType; // A builtin or interface type. 2819 2820 /// \brief The number of protocols stored after the ObjCObjectPointerType 2821 /// node. 2822 /// 2823 /// The list of protocols is sorted on protocol name. No protocol is enterred 2824 /// more than once. 2825 unsigned NumProtocols; 2826 2827 ObjCObjectPointerType(QualType Canonical, QualType T, 2828 ObjCProtocolDecl **Protos, unsigned NumP); 2829 friend class ASTContext; // ASTContext creates these. 2830 2831public: 2832 void Destroy(ASTContext& C); 2833 2834 // Get the pointee type. Pointee will either be: 2835 // - a built-in type (for 'id' and 'Class'). 2836 // - an interface type (for user-defined types). 2837 // - a TypedefType whose canonical type is an interface (as in 'T' below). 2838 // For example: typedef NSObject T; T *var; 2839 QualType getPointeeType() const { return PointeeType; } 2840 2841 const ObjCInterfaceType *getInterfaceType() const { 2842 return PointeeType->getAs<ObjCInterfaceType>(); 2843 } 2844 /// getInterfaceDecl - returns an interface decl for user-defined types. 2845 ObjCInterfaceDecl *getInterfaceDecl() const { 2846 return getInterfaceType() ? getInterfaceType()->getDecl() : 0; 2847 } 2848 /// isObjCIdType - true for "id". 2849 bool isObjCIdType() const { 2850 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCId) && 2851 !NumProtocols; 2852 } 2853 /// isObjCClassType - true for "Class". 2854 bool isObjCClassType() const { 2855 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCClass) && 2856 !NumProtocols; 2857 } 2858 2859 /// isObjCQualifiedIdType - true for "id <p>". 2860 bool isObjCQualifiedIdType() const { 2861 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCId) && 2862 NumProtocols; 2863 } 2864 /// isObjCQualifiedClassType - true for "Class <p>". 2865 bool isObjCQualifiedClassType() const { 2866 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCClass) && 2867 NumProtocols; 2868 } 2869 /// qual_iterator and friends: this provides access to the (potentially empty) 2870 /// list of protocols qualifying this interface. 2871 typedef ObjCProtocolDecl* const * qual_iterator; 2872 2873 qual_iterator qual_begin() const { 2874 return reinterpret_cast<qual_iterator> (this + 1); 2875 } 2876 qual_iterator qual_end() const { 2877 return qual_begin() + NumProtocols; 2878 } 2879 bool qual_empty() const { return NumProtocols == 0; } 2880 2881 /// getNumProtocols - Return the number of qualifying protocols in this 2882 /// interface type, or 0 if there are none. 2883 unsigned getNumProtocols() const { return NumProtocols; } 2884 2885 /// \brief Retrieve the Ith protocol. 2886 ObjCProtocolDecl *getProtocol(unsigned I) const { 2887 assert(I < getNumProtocols() && "Out-of-range protocol access"); 2888 return qual_begin()[I]; 2889 } 2890 2891 bool isSugared() const { return false; } 2892 QualType desugar() const { return QualType(this, 0); } 2893 2894 virtual Linkage getLinkage() const; 2895 2896 void Profile(llvm::FoldingSetNodeID &ID); 2897 static void Profile(llvm::FoldingSetNodeID &ID, QualType T, 2898 ObjCProtocolDecl *const *protocols, 2899 unsigned NumProtocols); 2900 static bool classof(const Type *T) { 2901 return T->getTypeClass() == ObjCObjectPointer; 2902 } 2903 static bool classof(const ObjCObjectPointerType *) { return true; } 2904}; 2905 2906/// A qualifier set is used to build a set of qualifiers. 2907class QualifierCollector : public Qualifiers { 2908 ASTContext *Context; 2909 2910public: 2911 QualifierCollector(Qualifiers Qs = Qualifiers()) 2912 : Qualifiers(Qs), Context(0) {} 2913 QualifierCollector(ASTContext &Context, Qualifiers Qs = Qualifiers()) 2914 : Qualifiers(Qs), Context(&Context) {} 2915 2916 void setContext(ASTContext &C) { Context = &C; } 2917 2918 /// Collect any qualifiers on the given type and return an 2919 /// unqualified type. 2920 const Type *strip(QualType QT) { 2921 addFastQualifiers(QT.getLocalFastQualifiers()); 2922 if (QT.hasLocalNonFastQualifiers()) { 2923 const ExtQuals *EQ = QT.getExtQualsUnsafe(); 2924 Context = &EQ->getContext(); 2925 addQualifiers(EQ->getQualifiers()); 2926 return EQ->getBaseType(); 2927 } 2928 return QT.getTypePtrUnsafe(); 2929 } 2930 2931 /// Apply the collected qualifiers to the given type. 2932 QualType apply(QualType QT) const; 2933 2934 /// Apply the collected qualifiers to the given type. 2935 QualType apply(const Type* T) const; 2936 2937}; 2938 2939 2940// Inline function definitions. 2941 2942inline bool QualType::isCanonical() const { 2943 const Type *T = getTypePtr(); 2944 if (hasLocalQualifiers()) 2945 return T->isCanonicalUnqualified() && !isa<ArrayType>(T); 2946 return T->isCanonicalUnqualified(); 2947} 2948 2949inline bool QualType::isCanonicalAsParam() const { 2950 if (hasLocalQualifiers()) return false; 2951 const Type *T = getTypePtr(); 2952 return T->isCanonicalUnqualified() && 2953 !isa<FunctionType>(T) && !isa<ArrayType>(T); 2954} 2955 2956inline bool QualType::isConstQualified() const { 2957 return isLocalConstQualified() || 2958 getTypePtr()->getCanonicalTypeInternal().isLocalConstQualified(); 2959} 2960 2961inline bool QualType::isRestrictQualified() const { 2962 return isLocalRestrictQualified() || 2963 getTypePtr()->getCanonicalTypeInternal().isLocalRestrictQualified(); 2964} 2965 2966 2967inline bool QualType::isVolatileQualified() const { 2968 return isLocalVolatileQualified() || 2969 getTypePtr()->getCanonicalTypeInternal().isLocalVolatileQualified(); 2970} 2971 2972inline bool QualType::hasQualifiers() const { 2973 return hasLocalQualifiers() || 2974 getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers(); 2975} 2976 2977inline Qualifiers QualType::getQualifiers() const { 2978 Qualifiers Quals = getLocalQualifiers(); 2979 Quals.addQualifiers( 2980 getTypePtr()->getCanonicalTypeInternal().getLocalQualifiers()); 2981 return Quals; 2982} 2983 2984inline unsigned QualType::getCVRQualifiers() const { 2985 return getLocalCVRQualifiers() | 2986 getTypePtr()->getCanonicalTypeInternal().getLocalCVRQualifiers(); 2987} 2988 2989/// getCVRQualifiersThroughArrayTypes - If there are CVR qualifiers for this 2990/// type, returns them. Otherwise, if this is an array type, recurses 2991/// on the element type until some qualifiers have been found or a non-array 2992/// type reached. 2993inline unsigned QualType::getCVRQualifiersThroughArrayTypes() const { 2994 if (unsigned Quals = getCVRQualifiers()) 2995 return Quals; 2996 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2997 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 2998 return AT->getElementType().getCVRQualifiersThroughArrayTypes(); 2999 return 0; 3000} 3001 3002inline void QualType::removeConst() { 3003 removeFastQualifiers(Qualifiers::Const); 3004} 3005 3006inline void QualType::removeRestrict() { 3007 removeFastQualifiers(Qualifiers::Restrict); 3008} 3009 3010inline void QualType::removeVolatile() { 3011 QualifierCollector Qc; 3012 const Type *Ty = Qc.strip(*this); 3013 if (Qc.hasVolatile()) { 3014 Qc.removeVolatile(); 3015 *this = Qc.apply(Ty); 3016 } 3017} 3018 3019inline void QualType::removeCVRQualifiers(unsigned Mask) { 3020 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 3021 3022 // Fast path: we don't need to touch the slow qualifiers. 3023 if (!(Mask & ~Qualifiers::FastMask)) { 3024 removeFastQualifiers(Mask); 3025 return; 3026 } 3027 3028 QualifierCollector Qc; 3029 const Type *Ty = Qc.strip(*this); 3030 Qc.removeCVRQualifiers(Mask); 3031 *this = Qc.apply(Ty); 3032} 3033 3034/// getAddressSpace - Return the address space of this type. 3035inline unsigned QualType::getAddressSpace() const { 3036 if (hasLocalNonFastQualifiers()) { 3037 const ExtQuals *EQ = getExtQualsUnsafe(); 3038 if (EQ->hasAddressSpace()) 3039 return EQ->getAddressSpace(); 3040 } 3041 3042 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3043 if (CT.hasLocalNonFastQualifiers()) { 3044 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 3045 if (EQ->hasAddressSpace()) 3046 return EQ->getAddressSpace(); 3047 } 3048 3049 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3050 return AT->getElementType().getAddressSpace(); 3051 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 3052 return RT->getAddressSpace(); 3053 return 0; 3054} 3055 3056/// getObjCGCAttr - Return the gc attribute of this type. 3057inline Qualifiers::GC QualType::getObjCGCAttr() const { 3058 if (hasLocalNonFastQualifiers()) { 3059 const ExtQuals *EQ = getExtQualsUnsafe(); 3060 if (EQ->hasObjCGCAttr()) 3061 return EQ->getObjCGCAttr(); 3062 } 3063 3064 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3065 if (CT.hasLocalNonFastQualifiers()) { 3066 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 3067 if (EQ->hasObjCGCAttr()) 3068 return EQ->getObjCGCAttr(); 3069 } 3070 3071 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3072 return AT->getElementType().getObjCGCAttr(); 3073 if (const ObjCObjectPointerType *PT = CT->getAs<ObjCObjectPointerType>()) 3074 return PT->getPointeeType().getObjCGCAttr(); 3075 // We most look at all pointer types, not just pointer to interface types. 3076 if (const PointerType *PT = CT->getAs<PointerType>()) 3077 return PT->getPointeeType().getObjCGCAttr(); 3078 return Qualifiers::GCNone; 3079} 3080 3081inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { 3082 if (const PointerType *PT = t.getAs<PointerType>()) { 3083 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 3084 return FT->getExtInfo(); 3085 } else if (const FunctionType *FT = t.getAs<FunctionType>()) 3086 return FT->getExtInfo(); 3087 3088 return FunctionType::ExtInfo(); 3089} 3090 3091inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { 3092 return getFunctionExtInfo(*t); 3093} 3094 3095/// isMoreQualifiedThan - Determine whether this type is more 3096/// qualified than the Other type. For example, "const volatile int" 3097/// is more qualified than "const int", "volatile int", and 3098/// "int". However, it is not more qualified than "const volatile 3099/// int". 3100inline bool QualType::isMoreQualifiedThan(QualType Other) const { 3101 // FIXME: work on arbitrary qualifiers 3102 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 3103 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 3104 if (getAddressSpace() != Other.getAddressSpace()) 3105 return false; 3106 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 3107} 3108 3109/// isAtLeastAsQualifiedAs - Determine whether this type is at last 3110/// as qualified as the Other type. For example, "const volatile 3111/// int" is at least as qualified as "const int", "volatile int", 3112/// "int", and "const volatile int". 3113inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 3114 // FIXME: work on arbitrary qualifiers 3115 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 3116 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 3117 if (getAddressSpace() != Other.getAddressSpace()) 3118 return false; 3119 return (MyQuals | OtherQuals) == MyQuals; 3120} 3121 3122/// getNonReferenceType - If Type is a reference type (e.g., const 3123/// int&), returns the type that the reference refers to ("const 3124/// int"). Otherwise, returns the type itself. This routine is used 3125/// throughout Sema to implement C++ 5p6: 3126/// 3127/// If an expression initially has the type "reference to T" (8.3.2, 3128/// 8.5.3), the type is adjusted to "T" prior to any further 3129/// analysis, the expression designates the object or function 3130/// denoted by the reference, and the expression is an lvalue. 3131inline QualType QualType::getNonReferenceType() const { 3132 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 3133 return RefType->getPointeeType(); 3134 else 3135 return *this; 3136} 3137 3138inline const ObjCInterfaceType *Type::getAsPointerToObjCInterfaceType() const { 3139 if (const PointerType *PT = getAs<PointerType>()) 3140 return PT->getPointeeType()->getAs<ObjCInterfaceType>(); 3141 return 0; 3142} 3143 3144inline bool Type::isFunctionType() const { 3145 return isa<FunctionType>(CanonicalType); 3146} 3147inline bool Type::isPointerType() const { 3148 return isa<PointerType>(CanonicalType); 3149} 3150inline bool Type::isAnyPointerType() const { 3151 return isPointerType() || isObjCObjectPointerType(); 3152} 3153inline bool Type::isBlockPointerType() const { 3154 return isa<BlockPointerType>(CanonicalType); 3155} 3156inline bool Type::isReferenceType() const { 3157 return isa<ReferenceType>(CanonicalType); 3158} 3159inline bool Type::isLValueReferenceType() const { 3160 return isa<LValueReferenceType>(CanonicalType); 3161} 3162inline bool Type::isRValueReferenceType() const { 3163 return isa<RValueReferenceType>(CanonicalType); 3164} 3165inline bool Type::isFunctionPointerType() const { 3166 if (const PointerType* T = getAs<PointerType>()) 3167 return T->getPointeeType()->isFunctionType(); 3168 else 3169 return false; 3170} 3171inline bool Type::isMemberPointerType() const { 3172 return isa<MemberPointerType>(CanonicalType); 3173} 3174inline bool Type::isMemberFunctionPointerType() const { 3175 if (const MemberPointerType* T = getAs<MemberPointerType>()) 3176 return T->getPointeeType()->isFunctionType(); 3177 else 3178 return false; 3179} 3180inline bool Type::isArrayType() const { 3181 return isa<ArrayType>(CanonicalType); 3182} 3183inline bool Type::isConstantArrayType() const { 3184 return isa<ConstantArrayType>(CanonicalType); 3185} 3186inline bool Type::isIncompleteArrayType() const { 3187 return isa<IncompleteArrayType>(CanonicalType); 3188} 3189inline bool Type::isVariableArrayType() const { 3190 return isa<VariableArrayType>(CanonicalType); 3191} 3192inline bool Type::isDependentSizedArrayType() const { 3193 return isa<DependentSizedArrayType>(CanonicalType); 3194} 3195inline bool Type::isRecordType() const { 3196 return isa<RecordType>(CanonicalType); 3197} 3198inline bool Type::isAnyComplexType() const { 3199 return isa<ComplexType>(CanonicalType); 3200} 3201inline bool Type::isVectorType() const { 3202 return isa<VectorType>(CanonicalType); 3203} 3204inline bool Type::isExtVectorType() const { 3205 return isa<ExtVectorType>(CanonicalType); 3206} 3207inline bool Type::isObjCObjectPointerType() const { 3208 return isa<ObjCObjectPointerType>(CanonicalType); 3209} 3210inline bool Type::isObjCInterfaceType() const { 3211 return isa<ObjCInterfaceType>(CanonicalType); 3212} 3213inline bool Type::isObjCQualifiedIdType() const { 3214 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3215 return OPT->isObjCQualifiedIdType(); 3216 return false; 3217} 3218inline bool Type::isObjCQualifiedClassType() const { 3219 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3220 return OPT->isObjCQualifiedClassType(); 3221 return false; 3222} 3223inline bool Type::isObjCIdType() const { 3224 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3225 return OPT->isObjCIdType(); 3226 return false; 3227} 3228inline bool Type::isObjCClassType() const { 3229 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3230 return OPT->isObjCClassType(); 3231 return false; 3232} 3233inline bool Type::isObjCSelType() const { 3234 if (const PointerType *OPT = getAs<PointerType>()) 3235 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 3236 return false; 3237} 3238inline bool Type::isObjCBuiltinType() const { 3239 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 3240} 3241inline bool Type::isTemplateTypeParmType() const { 3242 return isa<TemplateTypeParmType>(CanonicalType); 3243} 3244 3245inline bool Type::isSpecificBuiltinType(unsigned K) const { 3246 if (const BuiltinType *BT = getAs<BuiltinType>()) 3247 if (BT->getKind() == (BuiltinType::Kind) K) 3248 return true; 3249 return false; 3250} 3251 3252/// \brief Determines whether this is a type for which one can define 3253/// an overloaded operator. 3254inline bool Type::isOverloadableType() const { 3255 return isDependentType() || isRecordType() || isEnumeralType(); 3256} 3257 3258inline bool Type::hasPointerRepresentation() const { 3259 return (isPointerType() || isReferenceType() || isBlockPointerType() || 3260 isObjCInterfaceType() || isObjCObjectPointerType() || 3261 isObjCQualifiedInterfaceType() || isNullPtrType()); 3262} 3263 3264inline bool Type::hasObjCPointerRepresentation() const { 3265 return (isObjCInterfaceType() || isObjCObjectPointerType() || 3266 isObjCQualifiedInterfaceType()); 3267} 3268 3269/// Insertion operator for diagnostics. This allows sending QualType's into a 3270/// diagnostic with <<. 3271inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 3272 QualType T) { 3273 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 3274 Diagnostic::ak_qualtype); 3275 return DB; 3276} 3277 3278/// Insertion operator for partial diagnostics. This allows sending QualType's 3279/// into a diagnostic with <<. 3280inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, 3281 QualType T) { 3282 PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 3283 Diagnostic::ak_qualtype); 3284 return PD; 3285} 3286 3287// Helper class template that is used by Type::getAs to ensure that one does 3288// not try to look through a qualified type to get to an array type. 3289template<typename T, 3290 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 3291 llvm::is_base_of<ArrayType, T>::value)> 3292struct ArrayType_cannot_be_used_with_getAs { }; 3293 3294template<typename T> 3295struct ArrayType_cannot_be_used_with_getAs<T, true>; 3296 3297/// Member-template getAs<specific type>'. 3298template <typename T> const T *Type::getAs() const { 3299 ArrayType_cannot_be_used_with_getAs<T> at; 3300 (void)at; 3301 3302 // If this is directly a T type, return it. 3303 if (const T *Ty = dyn_cast<T>(this)) 3304 return Ty; 3305 3306 // If the canonical form of this type isn't the right kind, reject it. 3307 if (!isa<T>(CanonicalType)) 3308 return 0; 3309 3310 // If this is a typedef for the type, strip the typedef off without 3311 // losing all typedef information. 3312 return cast<T>(getUnqualifiedDesugaredType()); 3313} 3314 3315} // end namespace clang 3316 3317#endif 3318