Type.h revision 52b136ace347ee82e11145927e37980157bacb35
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 CC_X86ThisCall // __attribute__((thiscall)) 401}; 402 403 404/// QualType - For efficiency, we don't store CV-qualified types as nodes on 405/// their own: instead each reference to a type stores the qualifiers. This 406/// greatly reduces the number of nodes we need to allocate for types (for 407/// example we only need one for 'int', 'const int', 'volatile int', 408/// 'const volatile int', etc). 409/// 410/// As an added efficiency bonus, instead of making this a pair, we 411/// just store the two bits we care about in the low bits of the 412/// pointer. To handle the packing/unpacking, we make QualType be a 413/// simple wrapper class that acts like a smart pointer. A third bit 414/// indicates whether there are extended qualifiers present, in which 415/// case the pointer points to a special structure. 416class QualType { 417 // Thankfully, these are efficiently composable. 418 llvm::PointerIntPair<llvm::PointerUnion<const Type*,const ExtQuals*>, 419 Qualifiers::FastWidth> Value; 420 421 const ExtQuals *getExtQualsUnsafe() const { 422 return Value.getPointer().get<const ExtQuals*>(); 423 } 424 425 const Type *getTypePtrUnsafe() const { 426 return Value.getPointer().get<const Type*>(); 427 } 428 429 QualType getUnqualifiedTypeSlow() const; 430 431 friend class QualifierCollector; 432public: 433 QualType() {} 434 435 QualType(const Type *Ptr, unsigned Quals) 436 : Value(Ptr, Quals) {} 437 QualType(const ExtQuals *Ptr, unsigned Quals) 438 : Value(Ptr, Quals) {} 439 440 unsigned getLocalFastQualifiers() const { return Value.getInt(); } 441 void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); } 442 443 /// Retrieves a pointer to the underlying (unqualified) type. 444 /// This should really return a const Type, but it's not worth 445 /// changing all the users right now. 446 Type *getTypePtr() const { 447 if (hasLocalNonFastQualifiers()) 448 return const_cast<Type*>(getExtQualsUnsafe()->getBaseType()); 449 return const_cast<Type*>(getTypePtrUnsafe()); 450 } 451 452 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 453 static QualType getFromOpaquePtr(void *Ptr) { 454 QualType T; 455 T.Value.setFromOpaqueValue(Ptr); 456 return T; 457 } 458 459 Type &operator*() const { 460 return *getTypePtr(); 461 } 462 463 Type *operator->() const { 464 return getTypePtr(); 465 } 466 467 bool isCanonical() const; 468 bool isCanonicalAsParam() const; 469 470 /// isNull - Return true if this QualType doesn't point to a type yet. 471 bool isNull() const { 472 return Value.getPointer().isNull(); 473 } 474 475 /// \brief Determine whether this particular QualType instance has the 476 /// "const" qualifier set, without looking through typedefs that may have 477 /// added "const" at a different level. 478 bool isLocalConstQualified() const { 479 return (getLocalFastQualifiers() & Qualifiers::Const); 480 } 481 482 /// \brief Determine whether this type is const-qualified. 483 bool isConstQualified() const; 484 485 /// \brief Determine whether this particular QualType instance has the 486 /// "restrict" qualifier set, without looking through typedefs that may have 487 /// added "restrict" at a different level. 488 bool isLocalRestrictQualified() const { 489 return (getLocalFastQualifiers() & Qualifiers::Restrict); 490 } 491 492 /// \brief Determine whether this type is restrict-qualified. 493 bool isRestrictQualified() const; 494 495 /// \brief Determine whether this particular QualType instance has the 496 /// "volatile" qualifier set, without looking through typedefs that may have 497 /// added "volatile" at a different level. 498 bool isLocalVolatileQualified() const { 499 return (hasLocalNonFastQualifiers() && getExtQualsUnsafe()->hasVolatile()); 500 } 501 502 /// \brief Determine whether this type is volatile-qualified. 503 bool isVolatileQualified() const; 504 505 /// \brief Determine whether this particular QualType instance has any 506 /// qualifiers, without looking through any typedefs that might add 507 /// qualifiers at a different level. 508 bool hasLocalQualifiers() const { 509 return getLocalFastQualifiers() || hasLocalNonFastQualifiers(); 510 } 511 512 /// \brief Determine whether this type has any qualifiers. 513 bool hasQualifiers() const; 514 515 /// \brief Determine whether this particular QualType instance has any 516 /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType 517 /// instance. 518 bool hasLocalNonFastQualifiers() const { 519 return Value.getPointer().is<const ExtQuals*>(); 520 } 521 522 /// \brief Retrieve the set of qualifiers local to this particular QualType 523 /// instance, not including any qualifiers acquired through typedefs or 524 /// other sugar. 525 Qualifiers getLocalQualifiers() const { 526 Qualifiers Quals; 527 if (hasLocalNonFastQualifiers()) 528 Quals = getExtQualsUnsafe()->getQualifiers(); 529 Quals.addFastQualifiers(getLocalFastQualifiers()); 530 return Quals; 531 } 532 533 /// \brief Retrieve the set of qualifiers applied to this type. 534 Qualifiers getQualifiers() const; 535 536 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 537 /// local to this particular QualType instance, not including any qualifiers 538 /// acquired through typedefs or other sugar. 539 unsigned getLocalCVRQualifiers() const { 540 unsigned CVR = getLocalFastQualifiers(); 541 if (isLocalVolatileQualified()) 542 CVR |= Qualifiers::Volatile; 543 return CVR; 544 } 545 546 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 547 /// applied to this type. 548 unsigned getCVRQualifiers() const; 549 550 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 551 /// applied to this type, looking through any number of unqualified array 552 /// types to their element types' qualifiers. 553 unsigned getCVRQualifiersThroughArrayTypes() const; 554 555 bool isConstant(ASTContext& Ctx) const { 556 return QualType::isConstant(*this, Ctx); 557 } 558 559 // Don't promise in the API that anything besides 'const' can be 560 // easily added. 561 562 /// addConst - add the specified type qualifier to this QualType. 563 void addConst() { 564 addFastQualifiers(Qualifiers::Const); 565 } 566 QualType withConst() const { 567 return withFastQualifiers(Qualifiers::Const); 568 } 569 570 void addFastQualifiers(unsigned TQs) { 571 assert(!(TQs & ~Qualifiers::FastMask) 572 && "non-fast qualifier bits set in mask!"); 573 Value.setInt(Value.getInt() | TQs); 574 } 575 576 // FIXME: The remove* functions are semantically broken, because they might 577 // not remove a qualifier stored on a typedef. Most of the with* functions 578 // have the same problem. 579 void removeConst(); 580 void removeVolatile(); 581 void removeRestrict(); 582 void removeCVRQualifiers(unsigned Mask); 583 584 void removeFastQualifiers() { Value.setInt(0); } 585 void removeFastQualifiers(unsigned Mask) { 586 assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers"); 587 Value.setInt(Value.getInt() & ~Mask); 588 } 589 590 // Creates a type with the given qualifiers in addition to any 591 // qualifiers already on this type. 592 QualType withFastQualifiers(unsigned TQs) const { 593 QualType T = *this; 594 T.addFastQualifiers(TQs); 595 return T; 596 } 597 598 // Creates a type with exactly the given fast qualifiers, removing 599 // any existing fast qualifiers. 600 QualType withExactFastQualifiers(unsigned TQs) const { 601 return withoutFastQualifiers().withFastQualifiers(TQs); 602 } 603 604 // Removes fast qualifiers, but leaves any extended qualifiers in place. 605 QualType withoutFastQualifiers() const { 606 QualType T = *this; 607 T.removeFastQualifiers(); 608 return T; 609 } 610 611 /// \brief Return this type with all of the instance-specific qualifiers 612 /// removed, but without removing any qualifiers that may have been applied 613 /// through typedefs. 614 QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); } 615 616 /// \brief Return the unqualified form of the given type, which might be 617 /// desugared to eliminate qualifiers introduced via typedefs. 618 QualType getUnqualifiedType() const { 619 QualType T = getLocalUnqualifiedType(); 620 if (!T.hasQualifiers()) 621 return T; 622 623 return getUnqualifiedTypeSlow(); 624 } 625 626 bool isMoreQualifiedThan(QualType Other) const; 627 bool isAtLeastAsQualifiedAs(QualType Other) const; 628 QualType getNonReferenceType() const; 629 630 /// getDesugaredType - Return the specified type with any "sugar" removed from 631 /// the type. This takes off typedefs, typeof's etc. If the outer level of 632 /// the type is already concrete, it returns it unmodified. This is similar 633 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 634 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 635 /// concrete. 636 /// 637 /// Qualifiers are left in place. 638 QualType getDesugaredType() const { 639 return QualType::getDesugaredType(*this); 640 } 641 642 /// operator==/!= - Indicate whether the specified types and qualifiers are 643 /// identical. 644 friend bool operator==(const QualType &LHS, const QualType &RHS) { 645 return LHS.Value == RHS.Value; 646 } 647 friend bool operator!=(const QualType &LHS, const QualType &RHS) { 648 return LHS.Value != RHS.Value; 649 } 650 std::string getAsString() const; 651 652 std::string getAsString(const PrintingPolicy &Policy) const { 653 std::string S; 654 getAsStringInternal(S, Policy); 655 return S; 656 } 657 void getAsStringInternal(std::string &Str, 658 const PrintingPolicy &Policy) const; 659 660 void dump(const char *s) const; 661 void dump() const; 662 663 void Profile(llvm::FoldingSetNodeID &ID) const { 664 ID.AddPointer(getAsOpaquePtr()); 665 } 666 667 /// getAddressSpace - Return the address space of this type. 668 inline unsigned getAddressSpace() const; 669 670 /// GCAttrTypesAttr - Returns gc attribute of this type. 671 inline Qualifiers::GC getObjCGCAttr() const; 672 673 /// isObjCGCWeak true when Type is objc's weak. 674 bool isObjCGCWeak() const { 675 return getObjCGCAttr() == Qualifiers::Weak; 676 } 677 678 /// isObjCGCStrong true when Type is objc's strong. 679 bool isObjCGCStrong() const { 680 return getObjCGCAttr() == Qualifiers::Strong; 681 } 682 683private: 684 // These methods are implemented in a separate translation unit; 685 // "static"-ize them to avoid creating temporary QualTypes in the 686 // caller. 687 static bool isConstant(QualType T, ASTContext& Ctx); 688 static QualType getDesugaredType(QualType T); 689}; 690 691} // end clang. 692 693namespace llvm { 694/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 695/// to a specific Type class. 696template<> struct simplify_type<const ::clang::QualType> { 697 typedef ::clang::Type* SimpleType; 698 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 699 return Val.getTypePtr(); 700 } 701}; 702template<> struct simplify_type< ::clang::QualType> 703 : public simplify_type<const ::clang::QualType> {}; 704 705// Teach SmallPtrSet that QualType is "basically a pointer". 706template<> 707class PointerLikeTypeTraits<clang::QualType> { 708public: 709 static inline void *getAsVoidPointer(clang::QualType P) { 710 return P.getAsOpaquePtr(); 711 } 712 static inline clang::QualType getFromVoidPointer(void *P) { 713 return clang::QualType::getFromOpaquePtr(P); 714 } 715 // Various qualifiers go in low bits. 716 enum { NumLowBitsAvailable = 0 }; 717}; 718 719} // end namespace llvm 720 721namespace clang { 722 723/// Type - This is the base class of the type hierarchy. A central concept 724/// with types is that each type always has a canonical type. A canonical type 725/// is the type with any typedef names stripped out of it or the types it 726/// references. For example, consider: 727/// 728/// typedef int foo; 729/// typedef foo* bar; 730/// 'int *' 'foo *' 'bar' 731/// 732/// There will be a Type object created for 'int'. Since int is canonical, its 733/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 734/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 735/// there is a PointerType that represents 'int*', which, like 'int', is 736/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 737/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 738/// is also 'int*'. 739/// 740/// Non-canonical types are useful for emitting diagnostics, without losing 741/// information about typedefs being used. Canonical types are useful for type 742/// comparisons (they allow by-pointer equality tests) and useful for reasoning 743/// about whether something has a particular form (e.g. is a function type), 744/// because they implicitly, recursively, strip all typedefs out of a type. 745/// 746/// Types, once created, are immutable. 747/// 748class Type { 749public: 750 enum TypeClass { 751#define TYPE(Class, Base) Class, 752#define LAST_TYPE(Class) TypeLast = Class, 753#define ABSTRACT_TYPE(Class, Base) 754#include "clang/AST/TypeNodes.def" 755 TagFirst = Record, TagLast = Enum 756 }; 757 758private: 759 Type(const Type&); // DO NOT IMPLEMENT. 760 void operator=(const Type&); // DO NOT IMPLEMENT. 761 762 QualType CanonicalType; 763 764 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 765 unsigned TC : 8; 766 767 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 768 /// Note that this should stay at the end of the ivars for Type so that 769 /// subclasses can pack their bitfields into the same word. 770 bool Dependent : 1; 771 772 /// \brief Whether the linkage of this type is already known. 773 mutable bool LinkageKnown : 1; 774 775 /// \brief Linkage of this type. 776 mutable unsigned CachedLinkage : 2; 777 778protected: 779 /// \brief Compute the linkage of this type. 780 virtual Linkage getLinkageImpl() const; 781 782 enum { BitsRemainingInType = 20 }; 783 784 // silence VC++ warning C4355: 'this' : used in base member initializer list 785 Type *this_() { return this; } 786 Type(TypeClass tc, QualType Canonical, bool dependent) 787 : CanonicalType(Canonical.isNull() ? QualType(this_(), 0) : Canonical), 788 TC(tc), Dependent(dependent), LinkageKnown(false), 789 CachedLinkage(NoLinkage) {} 790 virtual ~Type() {} 791 virtual void Destroy(ASTContext& C); 792 friend class ASTContext; 793 794public: 795 TypeClass getTypeClass() const { return static_cast<TypeClass>(TC); } 796 797 bool isCanonicalUnqualified() const { 798 return CanonicalType.getTypePtr() == this; 799 } 800 801 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 802 /// object types, function types, and incomplete types. 803 804 /// \brief Determines whether the type describes an object in memory. 805 /// 806 /// Note that this definition of object type corresponds to the C++ 807 /// definition of object type, which includes incomplete types, as 808 /// opposed to the C definition (which does not include incomplete 809 /// types). 810 bool isObjectType() const; 811 812 /// isIncompleteType - Return true if this is an incomplete type. 813 /// A type that can describe objects, but which lacks information needed to 814 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 815 /// routine will need to determine if the size is actually required. 816 bool isIncompleteType() const; 817 818 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 819 /// type, in other words, not a function type. 820 bool isIncompleteOrObjectType() const { 821 return !isFunctionType(); 822 } 823 824 /// isPODType - Return true if this is a plain-old-data type (C++ 3.9p10). 825 bool isPODType() const; 826 827 /// isLiteralType - Return true if this is a literal type 828 /// (C++0x [basic.types]p10) 829 bool isLiteralType() const; 830 831 /// isVariablyModifiedType (C99 6.7.5.2p2) - Return true for variable array 832 /// types that have a non-constant expression. This does not include "[]". 833 bool isVariablyModifiedType() const; 834 835 /// Helper methods to distinguish type categories. All type predicates 836 /// operate on the canonical type, ignoring typedefs and qualifiers. 837 838 /// isBuiltinType - returns true if the type is a builtin type. 839 bool isBuiltinType() const; 840 841 /// isSpecificBuiltinType - Test for a particular builtin type. 842 bool isSpecificBuiltinType(unsigned K) const; 843 844 /// isIntegerType() does *not* include complex integers (a GCC extension). 845 /// isComplexIntegerType() can be used to test for complex integers. 846 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 847 bool isEnumeralType() const; 848 bool isBooleanType() const; 849 bool isCharType() const; 850 bool isWideCharType() const; 851 bool isAnyCharacterType() const; 852 bool isIntegralType() const; 853 854 /// Floating point categories. 855 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 856 /// isComplexType() does *not* include complex integers (a GCC extension). 857 /// isComplexIntegerType() can be used to test for complex integers. 858 bool isComplexType() const; // C99 6.2.5p11 (complex) 859 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 860 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 861 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 862 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 863 bool isVoidType() const; // C99 6.2.5p19 864 bool isDerivedType() const; // C99 6.2.5p20 865 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 866 bool isAggregateType() const; 867 868 // Type Predicates: Check to see if this type is structurally the specified 869 // type, ignoring typedefs and qualifiers. 870 bool isFunctionType() const; 871 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 872 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 873 bool isPointerType() const; 874 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 875 bool isBlockPointerType() const; 876 bool isVoidPointerType() const; 877 bool isReferenceType() const; 878 bool isLValueReferenceType() const; 879 bool isRValueReferenceType() const; 880 bool isFunctionPointerType() const; 881 bool isMemberPointerType() const; 882 bool isMemberFunctionPointerType() const; 883 bool isArrayType() const; 884 bool isConstantArrayType() const; 885 bool isIncompleteArrayType() const; 886 bool isVariableArrayType() const; 887 bool isDependentSizedArrayType() const; 888 bool isRecordType() const; 889 bool isClassType() const; 890 bool isStructureType() const; 891 bool isStructureOrClassType() const; 892 bool isUnionType() const; 893 bool isComplexIntegerType() const; // GCC _Complex integer type. 894 bool isVectorType() const; // GCC vector type. 895 bool isExtVectorType() const; // Extended vector type. 896 bool isObjCObjectPointerType() const; // Pointer to *any* ObjC object. 897 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 898 // for the common case. 899 bool isObjCObjectType() const; // NSString or typeof(*(id)0) 900 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 901 bool isObjCQualifiedIdType() const; // id<foo> 902 bool isObjCQualifiedClassType() const; // Class<foo> 903 bool isObjCIdType() const; // id 904 bool isObjCClassType() const; // Class 905 bool isObjCSelType() const; // Class 906 bool isObjCBuiltinType() const; // 'id' or 'Class' 907 bool isTemplateTypeParmType() const; // C++ template type parameter 908 bool isNullPtrType() const; // C++0x nullptr_t 909 910 /// isDependentType - Whether this type is a dependent type, meaning 911 /// that its definition somehow depends on a template parameter 912 /// (C++ [temp.dep.type]). 913 bool isDependentType() const { return Dependent; } 914 bool isOverloadableType() const; 915 916 /// \brief Determine wither this type is a C++ elaborated-type-specifier. 917 bool isElaboratedTypeSpecifier() const; 918 919 /// hasPointerRepresentation - Whether this type is represented 920 /// natively as a pointer; this includes pointers, references, block 921 /// pointers, and Objective-C interface, qualified id, and qualified 922 /// interface types, as well as nullptr_t. 923 bool hasPointerRepresentation() const; 924 925 /// hasObjCPointerRepresentation - Whether this type can represent 926 /// an objective pointer type for the purpose of GC'ability 927 bool hasObjCPointerRepresentation() const; 928 929 // Type Checking Functions: Check to see if this type is structurally the 930 // specified type, ignoring typedefs and qualifiers, and return a pointer to 931 // the best type we can. 932 const RecordType *getAsStructureType() const; 933 /// NOTE: getAs*ArrayType are methods on ASTContext. 934 const RecordType *getAsUnionType() const; 935 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 936 // The following is a convenience method that returns an ObjCObjectPointerType 937 // for object declared using an interface. 938 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 939 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 940 const ObjCObjectType *getAsObjCQualifiedInterfaceType() const; 941 const CXXRecordDecl *getCXXRecordDeclForPointerType() const; 942 943 /// \brief Retrieves the CXXRecordDecl that this type refers to, either 944 /// because the type is a RecordType or because it is the injected-class-name 945 /// type of a class template or class template partial specialization. 946 CXXRecordDecl *getAsCXXRecordDecl() const; 947 948 // Member-template getAs<specific type>'. This scheme will eventually 949 // replace the specific getAsXXXX methods above. 950 // 951 // There are some specializations of this member template listed 952 // immediately following this class. 953 template <typename T> const T *getAs() const; 954 955 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 956 /// element type of the array, potentially with type qualifiers missing. 957 /// This method should never be used when type qualifiers are meaningful. 958 const Type *getArrayElementTypeNoTypeQual() const; 959 960 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 961 /// pointer, this returns the respective pointee. 962 QualType getPointeeType() const; 963 964 /// getUnqualifiedDesugaredType() - Return the specified type with 965 /// any "sugar" removed from the type, removing any typedefs, 966 /// typeofs, etc., as well as any qualifiers. 967 const Type *getUnqualifiedDesugaredType() const; 968 969 /// More type predicates useful for type checking/promotion 970 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 971 972 /// isSignedIntegerType - Return true if this is an integer type that is 973 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 974 /// an enum decl which has a signed representation, or a vector of signed 975 /// integer element type. 976 bool isSignedIntegerType() const; 977 978 /// isUnsignedIntegerType - Return true if this is an integer type that is 979 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 980 /// decl which has an unsigned representation, or a vector of unsigned integer 981 /// element type. 982 bool isUnsignedIntegerType() const; 983 984 /// isConstantSizeType - Return true if this is not a variable sized type, 985 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 986 /// incomplete types. 987 bool isConstantSizeType() const; 988 989 /// isSpecifierType - Returns true if this type can be represented by some 990 /// set of type specifiers. 991 bool isSpecifierType() const; 992 993 /// \brief Determine the linkage of this type. 994 Linkage getLinkage() const; 995 996 /// \brief Note that the linkage is no longer known. 997 void ClearLinkageCache(); 998 999 const char *getTypeClassName() const; 1000 1001 QualType getCanonicalTypeInternal() const { 1002 return CanonicalType; 1003 } 1004 CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h 1005 void dump() const; 1006 static bool classof(const Type *) { return true; } 1007}; 1008 1009template <> inline const TypedefType *Type::getAs() const { 1010 return dyn_cast<TypedefType>(this); 1011} 1012 1013// We can do canonical leaf types faster, because we don't have to 1014// worry about preserving child type decoration. 1015#define TYPE(Class, Base) 1016#define LEAF_TYPE(Class) \ 1017template <> inline const Class##Type *Type::getAs() const { \ 1018 return dyn_cast<Class##Type>(CanonicalType); \ 1019} 1020#include "clang/AST/TypeNodes.def" 1021 1022 1023/// BuiltinType - This class is used for builtin types like 'int'. Builtin 1024/// types are always canonical and have a literal name field. 1025class BuiltinType : public Type { 1026public: 1027 enum Kind { 1028 Void, 1029 1030 Bool, // This is bool and/or _Bool. 1031 Char_U, // This is 'char' for targets where char is unsigned. 1032 UChar, // This is explicitly qualified unsigned char. 1033 Char16, // This is 'char16_t' for C++. 1034 Char32, // This is 'char32_t' for C++. 1035 UShort, 1036 UInt, 1037 ULong, 1038 ULongLong, 1039 UInt128, // __uint128_t 1040 1041 Char_S, // This is 'char' for targets where char is signed. 1042 SChar, // This is explicitly qualified signed char. 1043 WChar, // This is 'wchar_t' for C++. 1044 Short, 1045 Int, 1046 Long, 1047 LongLong, 1048 Int128, // __int128_t 1049 1050 Float, Double, LongDouble, 1051 1052 NullPtr, // This is the type of C++0x 'nullptr'. 1053 1054 Overload, // This represents the type of an overloaded function declaration. 1055 Dependent, // This represents the type of a type-dependent expression. 1056 1057 UndeducedAuto, // In C++0x, this represents the type of an auto variable 1058 // that has not been deduced yet. 1059 1060 /// The primitive Objective C 'id' type. The type pointed to by the 1061 /// user-visible 'id' type. Only ever shows up in an AST as the base 1062 /// type of an ObjCObjectType. 1063 ObjCId, 1064 1065 /// The primitive Objective C 'Class' type. The type pointed to by the 1066 /// user-visible 'Class' type. Only ever shows up in an AST as the 1067 /// base type of an ObjCObjectType. 1068 ObjCClass, 1069 1070 ObjCSel // This represents the ObjC 'SEL' type. 1071 }; 1072private: 1073 Kind TypeKind; 1074 1075protected: 1076 virtual Linkage getLinkageImpl() const; 1077 1078public: 1079 BuiltinType(Kind K) 1080 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent)), 1081 TypeKind(K) {} 1082 1083 Kind getKind() const { return TypeKind; } 1084 const char *getName(const LangOptions &LO) const; 1085 1086 bool isSugared() const { return false; } 1087 QualType desugar() const { return QualType(this, 0); } 1088 1089 bool isInteger() const { 1090 return TypeKind >= Bool && TypeKind <= Int128; 1091 } 1092 1093 bool isSignedInteger() const { 1094 return TypeKind >= Char_S && TypeKind <= Int128; 1095 } 1096 1097 bool isUnsignedInteger() const { 1098 return TypeKind >= Bool && TypeKind <= UInt128; 1099 } 1100 1101 bool isFloatingPoint() const { 1102 return TypeKind >= Float && TypeKind <= LongDouble; 1103 } 1104 1105 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1106 static bool classof(const BuiltinType *) { return true; } 1107}; 1108 1109/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1110/// types (_Complex float etc) as well as the GCC integer complex extensions. 1111/// 1112class ComplexType : public Type, public llvm::FoldingSetNode { 1113 QualType ElementType; 1114 ComplexType(QualType Element, QualType CanonicalPtr) : 1115 Type(Complex, CanonicalPtr, Element->isDependentType()), 1116 ElementType(Element) { 1117 } 1118 friend class ASTContext; // ASTContext creates these. 1119 1120protected: 1121 virtual Linkage getLinkageImpl() const; 1122 1123public: 1124 QualType getElementType() const { return ElementType; } 1125 1126 bool isSugared() const { return false; } 1127 QualType desugar() const { return QualType(this, 0); } 1128 1129 void Profile(llvm::FoldingSetNodeID &ID) { 1130 Profile(ID, getElementType()); 1131 } 1132 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1133 ID.AddPointer(Element.getAsOpaquePtr()); 1134 } 1135 1136 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1137 static bool classof(const ComplexType *) { return true; } 1138}; 1139 1140/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1141/// 1142class PointerType : public Type, public llvm::FoldingSetNode { 1143 QualType PointeeType; 1144 1145 PointerType(QualType Pointee, QualType CanonicalPtr) : 1146 Type(Pointer, CanonicalPtr, Pointee->isDependentType()), PointeeType(Pointee) { 1147 } 1148 friend class ASTContext; // ASTContext creates these. 1149 1150protected: 1151 virtual Linkage getLinkageImpl() const; 1152 1153public: 1154 1155 QualType getPointeeType() const { return PointeeType; } 1156 1157 bool isSugared() const { return false; } 1158 QualType desugar() const { return QualType(this, 0); } 1159 1160 void Profile(llvm::FoldingSetNodeID &ID) { 1161 Profile(ID, getPointeeType()); 1162 } 1163 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1164 ID.AddPointer(Pointee.getAsOpaquePtr()); 1165 } 1166 1167 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1168 static bool classof(const PointerType *) { return true; } 1169}; 1170 1171/// BlockPointerType - pointer to a block type. 1172/// This type is to represent types syntactically represented as 1173/// "void (^)(int)", etc. Pointee is required to always be a function type. 1174/// 1175class BlockPointerType : public Type, public llvm::FoldingSetNode { 1176 QualType PointeeType; // Block is some kind of pointer type 1177 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1178 Type(BlockPointer, CanonicalCls, Pointee->isDependentType()), 1179 PointeeType(Pointee) { 1180 } 1181 friend class ASTContext; // ASTContext creates these. 1182 1183protected: 1184 virtual Linkage getLinkageImpl() const; 1185 1186public: 1187 1188 // Get the pointee type. Pointee is required to always be a function type. 1189 QualType getPointeeType() const { return PointeeType; } 1190 1191 bool isSugared() const { return false; } 1192 QualType desugar() const { return QualType(this, 0); } 1193 1194 void Profile(llvm::FoldingSetNodeID &ID) { 1195 Profile(ID, getPointeeType()); 1196 } 1197 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1198 ID.AddPointer(Pointee.getAsOpaquePtr()); 1199 } 1200 1201 static bool classof(const Type *T) { 1202 return T->getTypeClass() == BlockPointer; 1203 } 1204 static bool classof(const BlockPointerType *) { return true; } 1205}; 1206 1207/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 1208/// 1209class ReferenceType : public Type, public llvm::FoldingSetNode { 1210 QualType PointeeType; 1211 1212 /// True if the type was originally spelled with an lvalue sigil. 1213 /// This is never true of rvalue references but can also be false 1214 /// on lvalue references because of C++0x [dcl.typedef]p9, 1215 /// as follows: 1216 /// 1217 /// typedef int &ref; // lvalue, spelled lvalue 1218 /// typedef int &&rvref; // rvalue 1219 /// ref &a; // lvalue, inner ref, spelled lvalue 1220 /// ref &&a; // lvalue, inner ref 1221 /// rvref &a; // lvalue, inner ref, spelled lvalue 1222 /// rvref &&a; // rvalue, inner ref 1223 bool SpelledAsLValue; 1224 1225 /// True if the inner type is a reference type. This only happens 1226 /// in non-canonical forms. 1227 bool InnerRef; 1228 1229protected: 1230 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 1231 bool SpelledAsLValue) : 1232 Type(tc, CanonicalRef, Referencee->isDependentType()), 1233 PointeeType(Referencee), SpelledAsLValue(SpelledAsLValue), 1234 InnerRef(Referencee->isReferenceType()) { 1235 } 1236 1237 virtual Linkage getLinkageImpl() const; 1238 1239public: 1240 bool isSpelledAsLValue() const { return SpelledAsLValue; } 1241 bool isInnerRef() const { return InnerRef; } 1242 1243 QualType getPointeeTypeAsWritten() const { return PointeeType; } 1244 QualType getPointeeType() const { 1245 // FIXME: this might strip inner qualifiers; okay? 1246 const ReferenceType *T = this; 1247 while (T->InnerRef) 1248 T = T->PointeeType->getAs<ReferenceType>(); 1249 return T->PointeeType; 1250 } 1251 1252 void Profile(llvm::FoldingSetNodeID &ID) { 1253 Profile(ID, PointeeType, SpelledAsLValue); 1254 } 1255 static void Profile(llvm::FoldingSetNodeID &ID, 1256 QualType Referencee, 1257 bool SpelledAsLValue) { 1258 ID.AddPointer(Referencee.getAsOpaquePtr()); 1259 ID.AddBoolean(SpelledAsLValue); 1260 } 1261 1262 static bool classof(const Type *T) { 1263 return T->getTypeClass() == LValueReference || 1264 T->getTypeClass() == RValueReference; 1265 } 1266 static bool classof(const ReferenceType *) { return true; } 1267}; 1268 1269/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 1270/// 1271class LValueReferenceType : public ReferenceType { 1272 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 1273 bool SpelledAsLValue) : 1274 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 1275 {} 1276 friend class ASTContext; // ASTContext creates these 1277public: 1278 bool isSugared() const { return false; } 1279 QualType desugar() const { return QualType(this, 0); } 1280 1281 static bool classof(const Type *T) { 1282 return T->getTypeClass() == LValueReference; 1283 } 1284 static bool classof(const LValueReferenceType *) { return true; } 1285}; 1286 1287/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 1288/// 1289class RValueReferenceType : public ReferenceType { 1290 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 1291 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 1292 } 1293 friend class ASTContext; // ASTContext creates these 1294public: 1295 bool isSugared() const { return false; } 1296 QualType desugar() const { return QualType(this, 0); } 1297 1298 static bool classof(const Type *T) { 1299 return T->getTypeClass() == RValueReference; 1300 } 1301 static bool classof(const RValueReferenceType *) { return true; } 1302}; 1303 1304/// MemberPointerType - C++ 8.3.3 - Pointers to members 1305/// 1306class MemberPointerType : public Type, public llvm::FoldingSetNode { 1307 QualType PointeeType; 1308 /// The class of which the pointee is a member. Must ultimately be a 1309 /// RecordType, but could be a typedef or a template parameter too. 1310 const Type *Class; 1311 1312 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 1313 Type(MemberPointer, CanonicalPtr, 1314 Cls->isDependentType() || Pointee->isDependentType()), 1315 PointeeType(Pointee), Class(Cls) { 1316 } 1317 friend class ASTContext; // ASTContext creates these. 1318 1319protected: 1320 virtual Linkage getLinkageImpl() const; 1321 1322public: 1323 1324 QualType getPointeeType() const { return PointeeType; } 1325 1326 const Type *getClass() const { return Class; } 1327 1328 bool isSugared() const { return false; } 1329 QualType desugar() const { return QualType(this, 0); } 1330 1331 void Profile(llvm::FoldingSetNodeID &ID) { 1332 Profile(ID, getPointeeType(), getClass()); 1333 } 1334 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 1335 const Type *Class) { 1336 ID.AddPointer(Pointee.getAsOpaquePtr()); 1337 ID.AddPointer(Class); 1338 } 1339 1340 static bool classof(const Type *T) { 1341 return T->getTypeClass() == MemberPointer; 1342 } 1343 static bool classof(const MemberPointerType *) { return true; } 1344}; 1345 1346/// ArrayType - C99 6.7.5.2 - Array Declarators. 1347/// 1348class ArrayType : public Type, public llvm::FoldingSetNode { 1349public: 1350 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 1351 /// an array with a static size (e.g. int X[static 4]), or an array 1352 /// with a star size (e.g. int X[*]). 1353 /// 'static' is only allowed on function parameters. 1354 enum ArraySizeModifier { 1355 Normal, Static, Star 1356 }; 1357private: 1358 /// ElementType - The element type of the array. 1359 QualType ElementType; 1360 1361 // NOTE: VC++ treats enums as signed, avoid using the ArraySizeModifier enum 1362 /// NOTE: These fields are packed into the bitfields space in the Type class. 1363 unsigned SizeModifier : 2; 1364 1365 /// IndexTypeQuals - Capture qualifiers in declarations like: 1366 /// 'int X[static restrict 4]'. For function parameters only. 1367 unsigned IndexTypeQuals : 3; 1368 1369protected: 1370 // C++ [temp.dep.type]p1: 1371 // A type is dependent if it is... 1372 // - an array type constructed from any dependent type or whose 1373 // size is specified by a constant expression that is 1374 // value-dependent, 1375 ArrayType(TypeClass tc, QualType et, QualType can, 1376 ArraySizeModifier sm, unsigned tq) 1377 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray), 1378 ElementType(et), SizeModifier(sm), IndexTypeQuals(tq) {} 1379 1380 friend class ASTContext; // ASTContext creates these. 1381 1382 virtual Linkage getLinkageImpl() const; 1383 1384public: 1385 QualType getElementType() const { return ElementType; } 1386 ArraySizeModifier getSizeModifier() const { 1387 return ArraySizeModifier(SizeModifier); 1388 } 1389 Qualifiers getIndexTypeQualifiers() const { 1390 return Qualifiers::fromCVRMask(IndexTypeQuals); 1391 } 1392 unsigned getIndexTypeCVRQualifiers() const { return IndexTypeQuals; } 1393 1394 static bool classof(const Type *T) { 1395 return T->getTypeClass() == ConstantArray || 1396 T->getTypeClass() == VariableArray || 1397 T->getTypeClass() == IncompleteArray || 1398 T->getTypeClass() == DependentSizedArray; 1399 } 1400 static bool classof(const ArrayType *) { return true; } 1401}; 1402 1403/// ConstantArrayType - This class represents the canonical version of 1404/// C arrays with a specified constant size. For example, the canonical 1405/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 1406/// type is 'int' and the size is 404. 1407class ConstantArrayType : public ArrayType { 1408 llvm::APInt Size; // Allows us to unique the type. 1409 1410 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 1411 ArraySizeModifier sm, unsigned tq) 1412 : ArrayType(ConstantArray, et, can, sm, tq), 1413 Size(size) {} 1414protected: 1415 ConstantArrayType(TypeClass tc, QualType et, QualType can, 1416 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 1417 : ArrayType(tc, et, can, sm, tq), Size(size) {} 1418 friend class ASTContext; // ASTContext creates these. 1419public: 1420 const llvm::APInt &getSize() const { return Size; } 1421 bool isSugared() const { return false; } 1422 QualType desugar() const { return QualType(this, 0); } 1423 1424 void Profile(llvm::FoldingSetNodeID &ID) { 1425 Profile(ID, getElementType(), getSize(), 1426 getSizeModifier(), getIndexTypeCVRQualifiers()); 1427 } 1428 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1429 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 1430 unsigned TypeQuals) { 1431 ID.AddPointer(ET.getAsOpaquePtr()); 1432 ID.AddInteger(ArraySize.getZExtValue()); 1433 ID.AddInteger(SizeMod); 1434 ID.AddInteger(TypeQuals); 1435 } 1436 static bool classof(const Type *T) { 1437 return T->getTypeClass() == ConstantArray; 1438 } 1439 static bool classof(const ConstantArrayType *) { return true; } 1440}; 1441 1442/// IncompleteArrayType - This class represents C arrays with an unspecified 1443/// size. For example 'int A[]' has an IncompleteArrayType where the element 1444/// type is 'int' and the size is unspecified. 1445class IncompleteArrayType : public ArrayType { 1446 1447 IncompleteArrayType(QualType et, QualType can, 1448 ArraySizeModifier sm, unsigned tq) 1449 : ArrayType(IncompleteArray, et, can, sm, tq) {} 1450 friend class ASTContext; // ASTContext creates these. 1451public: 1452 bool isSugared() const { return false; } 1453 QualType desugar() const { return QualType(this, 0); } 1454 1455 static bool classof(const Type *T) { 1456 return T->getTypeClass() == IncompleteArray; 1457 } 1458 static bool classof(const IncompleteArrayType *) { return true; } 1459 1460 friend class StmtIteratorBase; 1461 1462 void Profile(llvm::FoldingSetNodeID &ID) { 1463 Profile(ID, getElementType(), getSizeModifier(), 1464 getIndexTypeCVRQualifiers()); 1465 } 1466 1467 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1468 ArraySizeModifier SizeMod, unsigned TypeQuals) { 1469 ID.AddPointer(ET.getAsOpaquePtr()); 1470 ID.AddInteger(SizeMod); 1471 ID.AddInteger(TypeQuals); 1472 } 1473}; 1474 1475/// VariableArrayType - This class represents C arrays with a specified size 1476/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 1477/// Since the size expression is an arbitrary expression, we store it as such. 1478/// 1479/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 1480/// should not be: two lexically equivalent variable array types could mean 1481/// different things, for example, these variables do not have the same type 1482/// dynamically: 1483/// 1484/// void foo(int x) { 1485/// int Y[x]; 1486/// ++x; 1487/// int Z[x]; 1488/// } 1489/// 1490class VariableArrayType : public ArrayType { 1491 /// SizeExpr - An assignment expression. VLA's are only permitted within 1492 /// a function block. 1493 Stmt *SizeExpr; 1494 /// Brackets - The left and right array brackets. 1495 SourceRange Brackets; 1496 1497 VariableArrayType(QualType et, QualType can, Expr *e, 1498 ArraySizeModifier sm, unsigned tq, 1499 SourceRange brackets) 1500 : ArrayType(VariableArray, et, can, sm, tq), 1501 SizeExpr((Stmt*) e), Brackets(brackets) {} 1502 friend class ASTContext; // ASTContext creates these. 1503 virtual void Destroy(ASTContext& C); 1504 1505public: 1506 Expr *getSizeExpr() const { 1507 // We use C-style casts instead of cast<> here because we do not wish 1508 // to have a dependency of Type.h on Stmt.h/Expr.h. 1509 return (Expr*) SizeExpr; 1510 } 1511 SourceRange getBracketsRange() const { return Brackets; } 1512 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1513 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1514 1515 bool isSugared() const { return false; } 1516 QualType desugar() const { return QualType(this, 0); } 1517 1518 static bool classof(const Type *T) { 1519 return T->getTypeClass() == VariableArray; 1520 } 1521 static bool classof(const VariableArrayType *) { return true; } 1522 1523 friend class StmtIteratorBase; 1524 1525 void Profile(llvm::FoldingSetNodeID &ID) { 1526 assert(0 && "Cannnot unique VariableArrayTypes."); 1527 } 1528}; 1529 1530/// DependentSizedArrayType - This type represents an array type in 1531/// C++ whose size is a value-dependent expression. For example: 1532/// 1533/// \code 1534/// template<typename T, int Size> 1535/// class array { 1536/// T data[Size]; 1537/// }; 1538/// \endcode 1539/// 1540/// For these types, we won't actually know what the array bound is 1541/// until template instantiation occurs, at which point this will 1542/// become either a ConstantArrayType or a VariableArrayType. 1543class DependentSizedArrayType : public ArrayType { 1544 ASTContext &Context; 1545 1546 /// \brief An assignment expression that will instantiate to the 1547 /// size of the array. 1548 /// 1549 /// The expression itself might be NULL, in which case the array 1550 /// type will have its size deduced from an initializer. 1551 Stmt *SizeExpr; 1552 1553 /// Brackets - The left and right array brackets. 1554 SourceRange Brackets; 1555 1556 DependentSizedArrayType(ASTContext &Context, QualType et, QualType can, 1557 Expr *e, ArraySizeModifier sm, unsigned tq, 1558 SourceRange brackets) 1559 : ArrayType(DependentSizedArray, et, can, sm, tq), 1560 Context(Context), SizeExpr((Stmt*) e), Brackets(brackets) {} 1561 friend class ASTContext; // ASTContext creates these. 1562 virtual void Destroy(ASTContext& C); 1563 1564public: 1565 Expr *getSizeExpr() const { 1566 // We use C-style casts instead of cast<> here because we do not wish 1567 // to have a dependency of Type.h on Stmt.h/Expr.h. 1568 return (Expr*) SizeExpr; 1569 } 1570 SourceRange getBracketsRange() const { return Brackets; } 1571 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1572 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1573 1574 bool isSugared() const { return false; } 1575 QualType desugar() const { return QualType(this, 0); } 1576 1577 static bool classof(const Type *T) { 1578 return T->getTypeClass() == DependentSizedArray; 1579 } 1580 static bool classof(const DependentSizedArrayType *) { return true; } 1581 1582 friend class StmtIteratorBase; 1583 1584 1585 void Profile(llvm::FoldingSetNodeID &ID) { 1586 Profile(ID, Context, getElementType(), 1587 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 1588 } 1589 1590 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1591 QualType ET, ArraySizeModifier SizeMod, 1592 unsigned TypeQuals, Expr *E); 1593}; 1594 1595/// DependentSizedExtVectorType - This type represent an extended vector type 1596/// where either the type or size is dependent. For example: 1597/// @code 1598/// template<typename T, int Size> 1599/// class vector { 1600/// typedef T __attribute__((ext_vector_type(Size))) type; 1601/// } 1602/// @endcode 1603class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 1604 ASTContext &Context; 1605 Expr *SizeExpr; 1606 /// ElementType - The element type of the array. 1607 QualType ElementType; 1608 SourceLocation loc; 1609 1610 DependentSizedExtVectorType(ASTContext &Context, QualType ElementType, 1611 QualType can, Expr *SizeExpr, SourceLocation loc) 1612 : Type (DependentSizedExtVector, can, true), 1613 Context(Context), SizeExpr(SizeExpr), ElementType(ElementType), 1614 loc(loc) {} 1615 friend class ASTContext; 1616 virtual void Destroy(ASTContext& C); 1617 1618public: 1619 Expr *getSizeExpr() const { return SizeExpr; } 1620 QualType getElementType() const { return ElementType; } 1621 SourceLocation getAttributeLoc() const { return loc; } 1622 1623 bool isSugared() const { return false; } 1624 QualType desugar() const { return QualType(this, 0); } 1625 1626 static bool classof(const Type *T) { 1627 return T->getTypeClass() == DependentSizedExtVector; 1628 } 1629 static bool classof(const DependentSizedExtVectorType *) { return true; } 1630 1631 void Profile(llvm::FoldingSetNodeID &ID) { 1632 Profile(ID, Context, getElementType(), getSizeExpr()); 1633 } 1634 1635 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1636 QualType ElementType, Expr *SizeExpr); 1637}; 1638 1639 1640/// VectorType - GCC generic vector type. This type is created using 1641/// __attribute__((vector_size(n)), where "n" specifies the vector size in 1642/// bytes; or from an Altivec __vector or vector declaration. 1643/// Since the constructor takes the number of vector elements, the 1644/// client is responsible for converting the size into the number of elements. 1645class VectorType : public Type, public llvm::FoldingSetNode { 1646protected: 1647 /// ElementType - The element type of the vector. 1648 QualType ElementType; 1649 1650 /// NumElements - The number of elements in the vector. 1651 unsigned NumElements; 1652 1653 /// AltiVec - True if this is for an Altivec vector. 1654 bool AltiVec; 1655 1656 /// Pixel - True if this is for an Altivec vector pixel. 1657 bool Pixel; 1658 1659 VectorType(QualType vecType, unsigned nElements, QualType canonType, 1660 bool isAltiVec, bool isPixel) : 1661 Type(Vector, canonType, vecType->isDependentType()), 1662 ElementType(vecType), NumElements(nElements), 1663 AltiVec(isAltiVec), Pixel(isPixel) {} 1664 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 1665 QualType canonType, bool isAltiVec, bool isPixel) 1666 : Type(tc, canonType, vecType->isDependentType()), ElementType(vecType), 1667 NumElements(nElements), AltiVec(isAltiVec), Pixel(isPixel) {} 1668 friend class ASTContext; // ASTContext creates these. 1669 1670 virtual Linkage getLinkageImpl() const; 1671 1672public: 1673 1674 QualType getElementType() const { return ElementType; } 1675 unsigned getNumElements() const { return NumElements; } 1676 1677 bool isSugared() const { return false; } 1678 QualType desugar() const { return QualType(this, 0); } 1679 1680 bool isAltiVec() const { return AltiVec; } 1681 1682 bool isPixel() const { return Pixel; } 1683 1684 void Profile(llvm::FoldingSetNodeID &ID) { 1685 Profile(ID, getElementType(), getNumElements(), getTypeClass(), 1686 AltiVec, Pixel); 1687 } 1688 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 1689 unsigned NumElements, TypeClass TypeClass, 1690 bool isAltiVec, bool isPixel) { 1691 ID.AddPointer(ElementType.getAsOpaquePtr()); 1692 ID.AddInteger(NumElements); 1693 ID.AddInteger(TypeClass); 1694 ID.AddBoolean(isAltiVec); 1695 ID.AddBoolean(isPixel); 1696 } 1697 1698 static bool classof(const Type *T) { 1699 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 1700 } 1701 static bool classof(const VectorType *) { return true; } 1702}; 1703 1704/// ExtVectorType - Extended vector type. This type is created using 1705/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 1706/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 1707/// class enables syntactic extensions, like Vector Components for accessing 1708/// points, colors, and textures (modeled after OpenGL Shading Language). 1709class ExtVectorType : public VectorType { 1710 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 1711 VectorType(ExtVector, vecType, nElements, canonType, false, false) {} 1712 friend class ASTContext; // ASTContext creates these. 1713public: 1714 static int getPointAccessorIdx(char c) { 1715 switch (c) { 1716 default: return -1; 1717 case 'x': return 0; 1718 case 'y': return 1; 1719 case 'z': return 2; 1720 case 'w': return 3; 1721 } 1722 } 1723 static int getNumericAccessorIdx(char c) { 1724 switch (c) { 1725 default: return -1; 1726 case '0': return 0; 1727 case '1': return 1; 1728 case '2': return 2; 1729 case '3': return 3; 1730 case '4': return 4; 1731 case '5': return 5; 1732 case '6': return 6; 1733 case '7': return 7; 1734 case '8': return 8; 1735 case '9': return 9; 1736 case 'A': 1737 case 'a': return 10; 1738 case 'B': 1739 case 'b': return 11; 1740 case 'C': 1741 case 'c': return 12; 1742 case 'D': 1743 case 'd': return 13; 1744 case 'E': 1745 case 'e': return 14; 1746 case 'F': 1747 case 'f': return 15; 1748 } 1749 } 1750 1751 static int getAccessorIdx(char c) { 1752 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 1753 return getNumericAccessorIdx(c); 1754 } 1755 1756 bool isAccessorWithinNumElements(char c) const { 1757 if (int idx = getAccessorIdx(c)+1) 1758 return unsigned(idx-1) < NumElements; 1759 return false; 1760 } 1761 bool isSugared() const { return false; } 1762 QualType desugar() const { return QualType(this, 0); } 1763 1764 static bool classof(const Type *T) { 1765 return T->getTypeClass() == ExtVector; 1766 } 1767 static bool classof(const ExtVectorType *) { return true; } 1768}; 1769 1770/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 1771/// class of FunctionNoProtoType and FunctionProtoType. 1772/// 1773class FunctionType : public Type { 1774 virtual void ANCHOR(); // Key function for FunctionType. 1775 1776 /// SubClassData - This field is owned by the subclass, put here to pack 1777 /// tightly with the ivars in Type. 1778 bool SubClassData : 1; 1779 1780 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1781 /// other bitfields. 1782 /// The qualifiers are part of FunctionProtoType because... 1783 /// 1784 /// C++ 8.3.5p4: The return type, the parameter type list and the 1785 /// cv-qualifier-seq, [...], are part of the function type. 1786 /// 1787 unsigned TypeQuals : 3; 1788 1789 /// NoReturn - Indicates if the function type is attribute noreturn. 1790 unsigned NoReturn : 1; 1791 1792 /// RegParm - How many arguments to pass inreg. 1793 unsigned RegParm : 3; 1794 1795 /// CallConv - The calling convention used by the function. 1796 unsigned CallConv : 3; 1797 1798 // The type returned by the function. 1799 QualType ResultType; 1800 1801 public: 1802 // This class is used for passing arround the information needed to 1803 // construct a call. It is not actually used for storage, just for 1804 // factoring together common arguments. 1805 // If you add a field (say Foo), other than the obvious places (both, constructors, 1806 // compile failures), what you need to update is 1807 // * Operetor== 1808 // * getFoo 1809 // * withFoo 1810 // * functionType. Add Foo, getFoo. 1811 // * ASTContext::getFooType 1812 // * ASTContext::mergeFunctionTypes 1813 // * FunctionNoProtoType::Profile 1814 // * FunctionProtoType::Profile 1815 // * TypePrinter::PrintFunctionProto 1816 // * PCH read and write 1817 // * Codegen 1818 1819 class ExtInfo { 1820 public: 1821 // Constructor with no defaults. Use this when you know that you 1822 // have all the elements (when reading a PCH file for example). 1823 ExtInfo(bool noReturn, unsigned regParm, CallingConv cc) : 1824 NoReturn(noReturn), RegParm(regParm), CC(cc) {} 1825 1826 // Constructor with all defaults. Use when for example creating a 1827 // function know to use defaults. 1828 ExtInfo() : NoReturn(false), RegParm(0), CC(CC_Default) {} 1829 1830 bool getNoReturn() const { return NoReturn; } 1831 unsigned getRegParm() const { return RegParm; } 1832 CallingConv getCC() const { return CC; } 1833 1834 bool operator==(const ExtInfo &Other) const { 1835 return getNoReturn() == Other.getNoReturn() && 1836 getRegParm() == Other.getRegParm() && 1837 getCC() == Other.getCC(); 1838 } 1839 bool operator!=(const ExtInfo &Other) const { 1840 return !(*this == Other); 1841 } 1842 1843 // Note that we don't have setters. That is by design, use 1844 // the following with methods instead of mutating these objects. 1845 1846 ExtInfo withNoReturn(bool noReturn) const { 1847 return ExtInfo(noReturn, getRegParm(), getCC()); 1848 } 1849 1850 ExtInfo withRegParm(unsigned RegParm) const { 1851 return ExtInfo(getNoReturn(), RegParm, getCC()); 1852 } 1853 1854 ExtInfo withCallingConv(CallingConv cc) const { 1855 return ExtInfo(getNoReturn(), getRegParm(), cc); 1856 } 1857 1858 private: 1859 // True if we have __attribute__((noreturn)) 1860 bool NoReturn; 1861 // The value passed to __attribute__((regparm(x))) 1862 unsigned RegParm; 1863 // The calling convention as specified via 1864 // __attribute__((cdecl|stdcall|fastcall|thiscall)) 1865 CallingConv CC; 1866 }; 1867 1868protected: 1869 FunctionType(TypeClass tc, QualType res, bool SubclassInfo, 1870 unsigned typeQuals, QualType Canonical, bool Dependent, 1871 const ExtInfo &Info) 1872 : Type(tc, Canonical, Dependent), 1873 SubClassData(SubclassInfo), TypeQuals(typeQuals), 1874 NoReturn(Info.getNoReturn()), 1875 RegParm(Info.getRegParm()), CallConv(Info.getCC()), ResultType(res) {} 1876 bool getSubClassData() const { return SubClassData; } 1877 unsigned getTypeQuals() const { return TypeQuals; } 1878public: 1879 1880 QualType getResultType() const { return ResultType; } 1881 unsigned getRegParmType() const { return RegParm; } 1882 bool getNoReturnAttr() const { return NoReturn; } 1883 CallingConv getCallConv() const { return (CallingConv)CallConv; } 1884 ExtInfo getExtInfo() const { 1885 return ExtInfo(NoReturn, RegParm, (CallingConv)CallConv); 1886 } 1887 1888 static llvm::StringRef getNameForCallConv(CallingConv CC); 1889 1890 static bool classof(const Type *T) { 1891 return T->getTypeClass() == FunctionNoProto || 1892 T->getTypeClass() == FunctionProto; 1893 } 1894 static bool classof(const FunctionType *) { return true; } 1895}; 1896 1897/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 1898/// no information available about its arguments. 1899class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 1900 FunctionNoProtoType(QualType Result, QualType Canonical, 1901 const ExtInfo &Info) 1902 : FunctionType(FunctionNoProto, Result, false, 0, Canonical, 1903 /*Dependent=*/false, Info) {} 1904 friend class ASTContext; // ASTContext creates these. 1905 1906protected: 1907 virtual Linkage getLinkageImpl() const; 1908 1909public: 1910 // No additional state past what FunctionType provides. 1911 1912 bool isSugared() const { return false; } 1913 QualType desugar() const { return QualType(this, 0); } 1914 1915 void Profile(llvm::FoldingSetNodeID &ID) { 1916 Profile(ID, getResultType(), getExtInfo()); 1917 } 1918 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 1919 const ExtInfo &Info) { 1920 ID.AddInteger(Info.getCC()); 1921 ID.AddInteger(Info.getRegParm()); 1922 ID.AddInteger(Info.getNoReturn()); 1923 ID.AddPointer(ResultType.getAsOpaquePtr()); 1924 } 1925 1926 static bool classof(const Type *T) { 1927 return T->getTypeClass() == FunctionNoProto; 1928 } 1929 static bool classof(const FunctionNoProtoType *) { return true; } 1930}; 1931 1932/// FunctionProtoType - Represents a prototype with argument type info, e.g. 1933/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 1934/// arguments, not as having a single void argument. Such a type can have an 1935/// exception specification, but this specification is not part of the canonical 1936/// type. 1937class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 1938 /// hasAnyDependentType - Determine whether there are any dependent 1939 /// types within the arguments passed in. 1940 static bool hasAnyDependentType(const QualType *ArgArray, unsigned numArgs) { 1941 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 1942 if (ArgArray[Idx]->isDependentType()) 1943 return true; 1944 1945 return false; 1946 } 1947 1948 FunctionProtoType(QualType Result, const QualType *ArgArray, unsigned numArgs, 1949 bool isVariadic, unsigned typeQuals, bool hasExs, 1950 bool hasAnyExs, const QualType *ExArray, 1951 unsigned numExs, QualType Canonical, 1952 const ExtInfo &Info) 1953 : FunctionType(FunctionProto, Result, isVariadic, typeQuals, Canonical, 1954 (Result->isDependentType() || 1955 hasAnyDependentType(ArgArray, numArgs)), 1956 Info), 1957 NumArgs(numArgs), NumExceptions(numExs), HasExceptionSpec(hasExs), 1958 AnyExceptionSpec(hasAnyExs) { 1959 // Fill in the trailing argument array. 1960 QualType *ArgInfo = reinterpret_cast<QualType*>(this+1); 1961 for (unsigned i = 0; i != numArgs; ++i) 1962 ArgInfo[i] = ArgArray[i]; 1963 // Fill in the exception array. 1964 QualType *Ex = ArgInfo + numArgs; 1965 for (unsigned i = 0; i != numExs; ++i) 1966 Ex[i] = ExArray[i]; 1967 } 1968 1969 /// NumArgs - The number of arguments this function has, not counting '...'. 1970 unsigned NumArgs : 20; 1971 1972 /// NumExceptions - The number of types in the exception spec, if any. 1973 unsigned NumExceptions : 10; 1974 1975 /// HasExceptionSpec - Whether this function has an exception spec at all. 1976 bool HasExceptionSpec : 1; 1977 1978 /// AnyExceptionSpec - Whether this function has a throw(...) spec. 1979 bool AnyExceptionSpec : 1; 1980 1981 /// ArgInfo - There is an variable size array after the class in memory that 1982 /// holds the argument types. 1983 1984 /// Exceptions - There is another variable size array after ArgInfo that 1985 /// holds the exception types. 1986 1987 friend class ASTContext; // ASTContext creates these. 1988 1989protected: 1990 virtual Linkage getLinkageImpl() const; 1991 1992public: 1993 unsigned getNumArgs() const { return NumArgs; } 1994 QualType getArgType(unsigned i) const { 1995 assert(i < NumArgs && "Invalid argument number!"); 1996 return arg_type_begin()[i]; 1997 } 1998 1999 bool hasExceptionSpec() const { return HasExceptionSpec; } 2000 bool hasAnyExceptionSpec() const { return AnyExceptionSpec; } 2001 unsigned getNumExceptions() const { return NumExceptions; } 2002 QualType getExceptionType(unsigned i) const { 2003 assert(i < NumExceptions && "Invalid exception number!"); 2004 return exception_begin()[i]; 2005 } 2006 bool hasEmptyExceptionSpec() const { 2007 return hasExceptionSpec() && !hasAnyExceptionSpec() && 2008 getNumExceptions() == 0; 2009 } 2010 2011 bool isVariadic() const { return getSubClassData(); } 2012 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 2013 2014 typedef const QualType *arg_type_iterator; 2015 arg_type_iterator arg_type_begin() const { 2016 return reinterpret_cast<const QualType *>(this+1); 2017 } 2018 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 2019 2020 typedef const QualType *exception_iterator; 2021 exception_iterator exception_begin() const { 2022 // exceptions begin where arguments end 2023 return arg_type_end(); 2024 } 2025 exception_iterator exception_end() const { 2026 return exception_begin() + NumExceptions; 2027 } 2028 2029 bool isSugared() const { return false; } 2030 QualType desugar() const { return QualType(this, 0); } 2031 2032 static bool classof(const Type *T) { 2033 return T->getTypeClass() == FunctionProto; 2034 } 2035 static bool classof(const FunctionProtoType *) { return true; } 2036 2037 void Profile(llvm::FoldingSetNodeID &ID); 2038 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 2039 arg_type_iterator ArgTys, unsigned NumArgs, 2040 bool isVariadic, unsigned TypeQuals, 2041 bool hasExceptionSpec, bool anyExceptionSpec, 2042 unsigned NumExceptions, exception_iterator Exs, 2043 const ExtInfo &ExtInfo); 2044}; 2045 2046 2047/// \brief Represents the dependent type named by a dependently-scoped 2048/// typename using declaration, e.g. 2049/// using typename Base<T>::foo; 2050/// Template instantiation turns these into the underlying type. 2051class UnresolvedUsingType : public Type { 2052 UnresolvedUsingTypenameDecl *Decl; 2053 2054 UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) 2055 : Type(UnresolvedUsing, QualType(), true), 2056 Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} 2057 friend class ASTContext; // ASTContext creates these. 2058public: 2059 2060 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 2061 2062 bool isSugared() const { return false; } 2063 QualType desugar() const { return QualType(this, 0); } 2064 2065 static bool classof(const Type *T) { 2066 return T->getTypeClass() == UnresolvedUsing; 2067 } 2068 static bool classof(const UnresolvedUsingType *) { return true; } 2069 2070 void Profile(llvm::FoldingSetNodeID &ID) { 2071 return Profile(ID, Decl); 2072 } 2073 static void Profile(llvm::FoldingSetNodeID &ID, 2074 UnresolvedUsingTypenameDecl *D) { 2075 ID.AddPointer(D); 2076 } 2077}; 2078 2079 2080class TypedefType : public Type { 2081 TypedefDecl *Decl; 2082protected: 2083 TypedefType(TypeClass tc, const TypedefDecl *D, QualType can) 2084 : Type(tc, can, can->isDependentType()), 2085 Decl(const_cast<TypedefDecl*>(D)) { 2086 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2087 } 2088 friend class ASTContext; // ASTContext creates these. 2089public: 2090 2091 TypedefDecl *getDecl() const { return Decl; } 2092 2093 /// LookThroughTypedefs - Return the ultimate type this typedef corresponds to 2094 /// potentially looking through *all* consecutive typedefs. This returns the 2095 /// sum of the type qualifiers, so if you have: 2096 /// typedef const int A; 2097 /// typedef volatile A B; 2098 /// looking through the typedefs for B will give you "const volatile A". 2099 QualType LookThroughTypedefs() const; 2100 2101 bool isSugared() const { return true; } 2102 QualType desugar() const; 2103 2104 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 2105 static bool classof(const TypedefType *) { return true; } 2106}; 2107 2108/// TypeOfExprType (GCC extension). 2109class TypeOfExprType : public Type { 2110 Expr *TOExpr; 2111 2112protected: 2113 TypeOfExprType(Expr *E, QualType can = QualType()); 2114 friend class ASTContext; // ASTContext creates these. 2115public: 2116 Expr *getUnderlyingExpr() const { return TOExpr; } 2117 2118 /// \brief Remove a single level of sugar. 2119 QualType desugar() const; 2120 2121 /// \brief Returns whether this type directly provides sugar. 2122 bool isSugared() const { return true; } 2123 2124 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 2125 static bool classof(const TypeOfExprType *) { return true; } 2126}; 2127 2128/// \brief Internal representation of canonical, dependent 2129/// typeof(expr) types. 2130/// 2131/// This class is used internally by the ASTContext to manage 2132/// canonical, dependent types, only. Clients will only see instances 2133/// of this class via TypeOfExprType nodes. 2134class DependentTypeOfExprType 2135 : public TypeOfExprType, public llvm::FoldingSetNode { 2136 ASTContext &Context; 2137 2138public: 2139 DependentTypeOfExprType(ASTContext &Context, Expr *E) 2140 : TypeOfExprType(E), Context(Context) { } 2141 2142 bool isSugared() const { return false; } 2143 QualType desugar() const { return QualType(this, 0); } 2144 2145 void Profile(llvm::FoldingSetNodeID &ID) { 2146 Profile(ID, Context, getUnderlyingExpr()); 2147 } 2148 2149 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2150 Expr *E); 2151}; 2152 2153/// TypeOfType (GCC extension). 2154class TypeOfType : public Type { 2155 QualType TOType; 2156 TypeOfType(QualType T, QualType can) 2157 : Type(TypeOf, can, T->isDependentType()), TOType(T) { 2158 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2159 } 2160 friend class ASTContext; // ASTContext creates these. 2161public: 2162 QualType getUnderlyingType() const { return TOType; } 2163 2164 /// \brief Remove a single level of sugar. 2165 QualType desugar() const { return getUnderlyingType(); } 2166 2167 /// \brief Returns whether this type directly provides sugar. 2168 bool isSugared() const { return true; } 2169 2170 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 2171 static bool classof(const TypeOfType *) { return true; } 2172}; 2173 2174/// DecltypeType (C++0x) 2175class DecltypeType : public Type { 2176 Expr *E; 2177 2178 // FIXME: We could get rid of UnderlyingType if we wanted to: We would have to 2179 // Move getDesugaredType to ASTContext so that it can call getDecltypeForExpr 2180 // from it. 2181 QualType UnderlyingType; 2182 2183protected: 2184 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 2185 friend class ASTContext; // ASTContext creates these. 2186public: 2187 Expr *getUnderlyingExpr() const { return E; } 2188 QualType getUnderlyingType() const { return UnderlyingType; } 2189 2190 /// \brief Remove a single level of sugar. 2191 QualType desugar() const { return getUnderlyingType(); } 2192 2193 /// \brief Returns whether this type directly provides sugar. 2194 bool isSugared() const { return !isDependentType(); } 2195 2196 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 2197 static bool classof(const DecltypeType *) { return true; } 2198}; 2199 2200/// \brief Internal representation of canonical, dependent 2201/// decltype(expr) types. 2202/// 2203/// This class is used internally by the ASTContext to manage 2204/// canonical, dependent types, only. Clients will only see instances 2205/// of this class via DecltypeType nodes. 2206class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 2207 ASTContext &Context; 2208 2209public: 2210 DependentDecltypeType(ASTContext &Context, Expr *E); 2211 2212 bool isSugared() const { return false; } 2213 QualType desugar() const { return QualType(this, 0); } 2214 2215 void Profile(llvm::FoldingSetNodeID &ID) { 2216 Profile(ID, Context, getUnderlyingExpr()); 2217 } 2218 2219 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2220 Expr *E); 2221}; 2222 2223class TagType : public Type { 2224 /// Stores the TagDecl associated with this type. The decl will 2225 /// point to the TagDecl that actually defines the entity (or is a 2226 /// definition in progress), if there is such a definition. The 2227 /// single-bit value will be non-zero when this tag is in the 2228 /// process of being defined. 2229 mutable llvm::PointerIntPair<TagDecl *, 1> decl; 2230 friend class ASTContext; 2231 friend class TagDecl; 2232 2233protected: 2234 TagType(TypeClass TC, const TagDecl *D, QualType can); 2235 2236 virtual Linkage getLinkageImpl() const; 2237 2238public: 2239 TagDecl *getDecl() const { return decl.getPointer(); } 2240 2241 /// @brief Determines whether this type is in the process of being 2242 /// defined. 2243 bool isBeingDefined() const { return decl.getInt(); } 2244 void setBeingDefined(bool Def) const { decl.setInt(Def? 1 : 0); } 2245 2246 static bool classof(const Type *T) { 2247 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 2248 } 2249 static bool classof(const TagType *) { return true; } 2250 static bool classof(const RecordType *) { return true; } 2251 static bool classof(const EnumType *) { return true; } 2252}; 2253 2254/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 2255/// to detect TagType objects of structs/unions/classes. 2256class RecordType : public TagType { 2257protected: 2258 explicit RecordType(const RecordDecl *D) 2259 : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2260 explicit RecordType(TypeClass TC, RecordDecl *D) 2261 : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2262 friend class ASTContext; // ASTContext creates these. 2263public: 2264 2265 RecordDecl *getDecl() const { 2266 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 2267 } 2268 2269 // FIXME: This predicate is a helper to QualType/Type. It needs to 2270 // recursively check all fields for const-ness. If any field is declared 2271 // const, it needs to return false. 2272 bool hasConstFields() const { return false; } 2273 2274 // FIXME: RecordType needs to check when it is created that all fields are in 2275 // the same address space, and return that. 2276 unsigned getAddressSpace() const { return 0; } 2277 2278 bool isSugared() const { return false; } 2279 QualType desugar() const { return QualType(this, 0); } 2280 2281 static bool classof(const TagType *T); 2282 static bool classof(const Type *T) { 2283 return isa<TagType>(T) && classof(cast<TagType>(T)); 2284 } 2285 static bool classof(const RecordType *) { return true; } 2286}; 2287 2288/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 2289/// to detect TagType objects of enums. 2290class EnumType : public TagType { 2291 explicit EnumType(const EnumDecl *D) 2292 : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2293 friend class ASTContext; // ASTContext creates these. 2294public: 2295 2296 EnumDecl *getDecl() const { 2297 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 2298 } 2299 2300 bool isSugared() const { return false; } 2301 QualType desugar() const { return QualType(this, 0); } 2302 2303 static bool classof(const TagType *T); 2304 static bool classof(const Type *T) { 2305 return isa<TagType>(T) && classof(cast<TagType>(T)); 2306 } 2307 static bool classof(const EnumType *) { return true; } 2308}; 2309 2310class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2311 unsigned Depth : 15; 2312 unsigned Index : 16; 2313 unsigned ParameterPack : 1; 2314 IdentifierInfo *Name; 2315 2316 TemplateTypeParmType(unsigned D, unsigned I, bool PP, IdentifierInfo *N, 2317 QualType Canon) 2318 : Type(TemplateTypeParm, Canon, /*Dependent=*/true), 2319 Depth(D), Index(I), ParameterPack(PP), Name(N) { } 2320 2321 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 2322 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true), 2323 Depth(D), Index(I), ParameterPack(PP), Name(0) { } 2324 2325 friend class ASTContext; // ASTContext creates these 2326 2327public: 2328 unsigned getDepth() const { return Depth; } 2329 unsigned getIndex() const { return Index; } 2330 bool isParameterPack() const { return ParameterPack; } 2331 IdentifierInfo *getName() const { return Name; } 2332 2333 bool isSugared() const { return false; } 2334 QualType desugar() const { return QualType(this, 0); } 2335 2336 void Profile(llvm::FoldingSetNodeID &ID) { 2337 Profile(ID, Depth, Index, ParameterPack, Name); 2338 } 2339 2340 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 2341 unsigned Index, bool ParameterPack, 2342 IdentifierInfo *Name) { 2343 ID.AddInteger(Depth); 2344 ID.AddInteger(Index); 2345 ID.AddBoolean(ParameterPack); 2346 ID.AddPointer(Name); 2347 } 2348 2349 static bool classof(const Type *T) { 2350 return T->getTypeClass() == TemplateTypeParm; 2351 } 2352 static bool classof(const TemplateTypeParmType *T) { return true; } 2353}; 2354 2355/// \brief Represents the result of substituting a type for a template 2356/// type parameter. 2357/// 2358/// Within an instantiated template, all template type parameters have 2359/// been replaced with these. They are used solely to record that a 2360/// type was originally written as a template type parameter; 2361/// therefore they are never canonical. 2362class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2363 // The original type parameter. 2364 const TemplateTypeParmType *Replaced; 2365 2366 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 2367 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType()), 2368 Replaced(Param) { } 2369 2370 friend class ASTContext; 2371 2372public: 2373 IdentifierInfo *getName() const { return Replaced->getName(); } 2374 2375 /// Gets the template parameter that was substituted for. 2376 const TemplateTypeParmType *getReplacedParameter() const { 2377 return Replaced; 2378 } 2379 2380 /// Gets the type that was substituted for the template 2381 /// parameter. 2382 QualType getReplacementType() const { 2383 return getCanonicalTypeInternal(); 2384 } 2385 2386 bool isSugared() const { return true; } 2387 QualType desugar() const { return getReplacementType(); } 2388 2389 void Profile(llvm::FoldingSetNodeID &ID) { 2390 Profile(ID, getReplacedParameter(), getReplacementType()); 2391 } 2392 static void Profile(llvm::FoldingSetNodeID &ID, 2393 const TemplateTypeParmType *Replaced, 2394 QualType Replacement) { 2395 ID.AddPointer(Replaced); 2396 ID.AddPointer(Replacement.getAsOpaquePtr()); 2397 } 2398 2399 static bool classof(const Type *T) { 2400 return T->getTypeClass() == SubstTemplateTypeParm; 2401 } 2402 static bool classof(const SubstTemplateTypeParmType *T) { return true; } 2403}; 2404 2405/// \brief Represents the type of a template specialization as written 2406/// in the source code. 2407/// 2408/// Template specialization types represent the syntactic form of a 2409/// template-id that refers to a type, e.g., @c vector<int>. Some 2410/// template specialization types are syntactic sugar, whose canonical 2411/// type will point to some other type node that represents the 2412/// instantiation or class template specialization. For example, a 2413/// class template specialization type of @c vector<int> will refer to 2414/// a tag type for the instantiation 2415/// @c std::vector<int, std::allocator<int>>. 2416/// 2417/// Other template specialization types, for which the template name 2418/// is dependent, may be canonical types. These types are always 2419/// dependent. 2420class TemplateSpecializationType 2421 : public Type, public llvm::FoldingSetNode { 2422 2423 // The ASTContext is currently needed in order to profile expressions. 2424 // FIXME: avoid this. 2425 // 2426 // The bool is whether this is a current instantiation. 2427 llvm::PointerIntPair<ASTContext*, 1, bool> ContextAndCurrentInstantiation; 2428 2429 /// \brief The name of the template being specialized. 2430 TemplateName Template; 2431 2432 /// \brief - The number of template arguments named in this class 2433 /// template specialization. 2434 unsigned NumArgs; 2435 2436 TemplateSpecializationType(ASTContext &Context, 2437 TemplateName T, 2438 bool IsCurrentInstantiation, 2439 const TemplateArgument *Args, 2440 unsigned NumArgs, QualType Canon); 2441 2442 virtual void Destroy(ASTContext& C); 2443 2444 friend class ASTContext; // ASTContext creates these 2445 2446public: 2447 /// \brief Determine whether any of the given template arguments are 2448 /// dependent. 2449 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 2450 unsigned NumArgs); 2451 2452 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 2453 unsigned NumArgs); 2454 2455 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &); 2456 2457 /// \brief Print a template argument list, including the '<' and '>' 2458 /// enclosing the template arguments. 2459 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 2460 unsigned NumArgs, 2461 const PrintingPolicy &Policy); 2462 2463 static std::string PrintTemplateArgumentList(const TemplateArgumentLoc *Args, 2464 unsigned NumArgs, 2465 const PrintingPolicy &Policy); 2466 2467 static std::string PrintTemplateArgumentList(const TemplateArgumentListInfo &, 2468 const PrintingPolicy &Policy); 2469 2470 /// True if this template specialization type matches a current 2471 /// instantiation in the context in which it is found. 2472 bool isCurrentInstantiation() const { 2473 return ContextAndCurrentInstantiation.getInt(); 2474 } 2475 2476 typedef const TemplateArgument * iterator; 2477 2478 iterator begin() const { return getArgs(); } 2479 iterator end() const; // defined inline in TemplateBase.h 2480 2481 /// \brief Retrieve the name of the template that we are specializing. 2482 TemplateName getTemplateName() const { return Template; } 2483 2484 /// \brief Retrieve the template arguments. 2485 const TemplateArgument *getArgs() const { 2486 return reinterpret_cast<const TemplateArgument *>(this + 1); 2487 } 2488 2489 /// \brief Retrieve the number of template arguments. 2490 unsigned getNumArgs() const { return NumArgs; } 2491 2492 /// \brief Retrieve a specific template argument as a type. 2493 /// \precondition @c isArgType(Arg) 2494 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 2495 2496 bool isSugared() const { 2497 return !isDependentType() || isCurrentInstantiation(); 2498 } 2499 QualType desugar() const { return getCanonicalTypeInternal(); } 2500 2501 void Profile(llvm::FoldingSetNodeID &ID) { 2502 Profile(ID, Template, isCurrentInstantiation(), getArgs(), NumArgs, 2503 *ContextAndCurrentInstantiation.getPointer()); 2504 } 2505 2506 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 2507 bool IsCurrentInstantiation, 2508 const TemplateArgument *Args, 2509 unsigned NumArgs, 2510 ASTContext &Context); 2511 2512 static bool classof(const Type *T) { 2513 return T->getTypeClass() == TemplateSpecialization; 2514 } 2515 static bool classof(const TemplateSpecializationType *T) { return true; } 2516}; 2517 2518/// \brief The injected class name of a C++ class template or class 2519/// template partial specialization. Used to record that a type was 2520/// spelled with a bare identifier rather than as a template-id; the 2521/// equivalent for non-templated classes is just RecordType. 2522/// 2523/// Injected class name types are always dependent. Template 2524/// instantiation turns these into RecordTypes. 2525/// 2526/// Injected class name types are always canonical. This works 2527/// because it is impossible to compare an injected class name type 2528/// with the corresponding non-injected template type, for the same 2529/// reason that it is impossible to directly compare template 2530/// parameters from different dependent contexts: injected class name 2531/// types can only occur within the scope of a particular templated 2532/// declaration, and within that scope every template specialization 2533/// will canonicalize to the injected class name (when appropriate 2534/// according to the rules of the language). 2535class InjectedClassNameType : public Type { 2536 CXXRecordDecl *Decl; 2537 2538 /// The template specialization which this type represents. 2539 /// For example, in 2540 /// template <class T> class A { ... }; 2541 /// this is A<T>, whereas in 2542 /// template <class X, class Y> class A<B<X,Y> > { ... }; 2543 /// this is A<B<X,Y> >. 2544 /// 2545 /// It is always unqualified, always a template specialization type, 2546 /// and always dependent. 2547 QualType InjectedType; 2548 2549 friend class ASTContext; // ASTContext creates these. 2550 friend class TagDecl; // TagDecl mutilates the Decl 2551 InjectedClassNameType(CXXRecordDecl *D, QualType TST) 2552 : Type(InjectedClassName, QualType(), true), 2553 Decl(D), InjectedType(TST) { 2554 assert(isa<TemplateSpecializationType>(TST)); 2555 assert(!TST.hasQualifiers()); 2556 assert(TST->isDependentType()); 2557 } 2558 2559public: 2560 QualType getInjectedSpecializationType() const { return InjectedType; } 2561 const TemplateSpecializationType *getInjectedTST() const { 2562 return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); 2563 } 2564 2565 CXXRecordDecl *getDecl() const { return Decl; } 2566 2567 bool isSugared() const { return false; } 2568 QualType desugar() const { return QualType(this, 0); } 2569 2570 static bool classof(const Type *T) { 2571 return T->getTypeClass() == InjectedClassName; 2572 } 2573 static bool classof(const InjectedClassNameType *T) { return true; } 2574}; 2575 2576/// \brief The kind of a tag type. 2577enum TagTypeKind { 2578 /// \brief The "struct" keyword. 2579 TTK_Struct, 2580 /// \brief The "union" keyword. 2581 TTK_Union, 2582 /// \brief The "class" keyword. 2583 TTK_Class, 2584 /// \brief The "enum" keyword. 2585 TTK_Enum 2586}; 2587 2588/// \brief The elaboration keyword that precedes a qualified type name or 2589/// introduces an elaborated-type-specifier. 2590enum ElaboratedTypeKeyword { 2591 /// \brief The "struct" keyword introduces the elaborated-type-specifier. 2592 ETK_Struct, 2593 /// \brief The "union" keyword introduces the elaborated-type-specifier. 2594 ETK_Union, 2595 /// \brief The "class" keyword introduces the elaborated-type-specifier. 2596 ETK_Class, 2597 /// \brief The "enum" keyword introduces the elaborated-type-specifier. 2598 ETK_Enum, 2599 /// \brief The "typename" keyword precedes the qualified type name, e.g., 2600 /// \c typename T::type. 2601 ETK_Typename, 2602 /// \brief No keyword precedes the qualified type name. 2603 ETK_None 2604}; 2605 2606/// A helper class for Type nodes having an ElaboratedTypeKeyword. 2607/// The keyword in stored in the free bits of the base class. 2608/// Also provides a few static helpers for converting and printing 2609/// elaborated type keyword and tag type kind enumerations. 2610class TypeWithKeyword : public Type { 2611 /// Keyword - Encodes an ElaboratedTypeKeyword enumeration constant. 2612 unsigned Keyword : 3; 2613 2614protected: 2615 TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, 2616 QualType Canonical, bool dependent) 2617 : Type(tc, Canonical, dependent), Keyword(Keyword) {} 2618 2619public: 2620 virtual ~TypeWithKeyword(); // pin vtable to Type.cpp 2621 2622 ElaboratedTypeKeyword getKeyword() const { 2623 return static_cast<ElaboratedTypeKeyword>(Keyword); 2624 } 2625 2626 /// getKeywordForTypeSpec - Converts a type specifier (DeclSpec::TST) 2627 /// into an elaborated type keyword. 2628 static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); 2629 2630 /// getTagTypeKindForTypeSpec - Converts a type specifier (DeclSpec::TST) 2631 /// into a tag type kind. It is an error to provide a type specifier 2632 /// which *isn't* a tag kind here. 2633 static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); 2634 2635 /// getKeywordForTagDeclKind - Converts a TagTypeKind into an 2636 /// elaborated type keyword. 2637 static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); 2638 2639 /// getTagTypeKindForKeyword - Converts an elaborated type keyword into 2640 // a TagTypeKind. It is an error to provide an elaborated type keyword 2641 /// which *isn't* a tag kind here. 2642 static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); 2643 2644 static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); 2645 2646 static const char *getKeywordName(ElaboratedTypeKeyword Keyword); 2647 2648 static const char *getTagTypeKindName(TagTypeKind Kind) { 2649 return getKeywordName(getKeywordForTagTypeKind(Kind)); 2650 } 2651 2652 class CannotCastToThisType {}; 2653 static CannotCastToThisType classof(const Type *); 2654}; 2655 2656/// \brief Represents a type that was referred to using an elaborated type 2657/// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, 2658/// or both. 2659/// 2660/// This type is used to keep track of a type name as written in the 2661/// source code, including tag keywords and any nested-name-specifiers. 2662/// The type itself is always "sugar", used to express what was written 2663/// in the source code but containing no additional semantic information. 2664class ElaboratedType : public TypeWithKeyword, public llvm::FoldingSetNode { 2665 2666 /// \brief The nested name specifier containing the qualifier. 2667 NestedNameSpecifier *NNS; 2668 2669 /// \brief The type that this qualified name refers to. 2670 QualType NamedType; 2671 2672 ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 2673 QualType NamedType, QualType CanonType) 2674 : TypeWithKeyword(Keyword, Elaborated, CanonType, 2675 NamedType->isDependentType()), 2676 NNS(NNS), NamedType(NamedType) { 2677 assert(!(Keyword == ETK_None && NNS == 0) && 2678 "ElaboratedType cannot have elaborated type keyword " 2679 "and name qualifier both null."); 2680 } 2681 2682 friend class ASTContext; // ASTContext creates these 2683 2684public: 2685 ~ElaboratedType(); 2686 2687 /// \brief Retrieve the qualification on this type. 2688 NestedNameSpecifier *getQualifier() const { return NNS; } 2689 2690 /// \brief Retrieve the type named by the qualified-id. 2691 QualType getNamedType() const { return NamedType; } 2692 2693 /// \brief Remove a single level of sugar. 2694 QualType desugar() const { return getNamedType(); } 2695 2696 /// \brief Returns whether this type directly provides sugar. 2697 bool isSugared() const { return true; } 2698 2699 void Profile(llvm::FoldingSetNodeID &ID) { 2700 Profile(ID, getKeyword(), NNS, NamedType); 2701 } 2702 2703 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 2704 NestedNameSpecifier *NNS, QualType NamedType) { 2705 ID.AddInteger(Keyword); 2706 ID.AddPointer(NNS); 2707 NamedType.Profile(ID); 2708 } 2709 2710 static bool classof(const Type *T) { 2711 return T->getTypeClass() == Elaborated; 2712 } 2713 static bool classof(const ElaboratedType *T) { return true; } 2714}; 2715 2716/// \brief Represents a qualified type name for which the type name is 2717/// dependent. 2718/// 2719/// DependentNameType represents a class of dependent types that involve a 2720/// dependent nested-name-specifier (e.g., "T::") followed by a (dependent) 2721/// name of a type. The DependentNameType may start with a "typename" (for a 2722/// typename-specifier), "class", "struct", "union", or "enum" (for a 2723/// dependent elaborated-type-specifier), or nothing (in contexts where we 2724/// know that we must be referring to a type, e.g., in a base class specifier). 2725class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { 2726 2727 /// \brief The nested name specifier containing the qualifier. 2728 NestedNameSpecifier *NNS; 2729 2730 /// \brief The type that this typename specifier refers to. 2731 const IdentifierInfo *Name; 2732 2733 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 2734 const IdentifierInfo *Name, QualType CanonType) 2735 : TypeWithKeyword(Keyword, DependentName, CanonType, true), 2736 NNS(NNS), Name(Name) { 2737 assert(NNS->isDependent() && 2738 "DependentNameType requires a dependent nested-name-specifier"); 2739 } 2740 2741 friend class ASTContext; // ASTContext creates these 2742 2743public: 2744 virtual ~DependentNameType(); 2745 2746 /// \brief Retrieve the qualification on this type. 2747 NestedNameSpecifier *getQualifier() const { return NNS; } 2748 2749 /// \brief Retrieve the type named by the typename specifier as an 2750 /// identifier. 2751 /// 2752 /// This routine will return a non-NULL identifier pointer when the 2753 /// form of the original typename was terminated by an identifier, 2754 /// e.g., "typename T::type". 2755 const IdentifierInfo *getIdentifier() const { 2756 return Name; 2757 } 2758 2759 bool isSugared() const { return false; } 2760 QualType desugar() const { return QualType(this, 0); } 2761 2762 void Profile(llvm::FoldingSetNodeID &ID) { 2763 Profile(ID, getKeyword(), NNS, Name); 2764 } 2765 2766 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 2767 NestedNameSpecifier *NNS, const IdentifierInfo *Name) { 2768 ID.AddInteger(Keyword); 2769 ID.AddPointer(NNS); 2770 ID.AddPointer(Name); 2771 } 2772 2773 static bool classof(const Type *T) { 2774 return T->getTypeClass() == DependentName; 2775 } 2776 static bool classof(const DependentNameType *T) { return true; } 2777}; 2778 2779/// DependentTemplateSpecializationType - Represents a template 2780/// specialization type whose template cannot be resolved, e.g. 2781/// A<T>::template B<T> 2782class DependentTemplateSpecializationType : 2783 public TypeWithKeyword, public llvm::FoldingSetNode { 2784 2785 /// The AST context. Unfortunately required in order to profile 2786 /// template arguments. 2787 ASTContext &Context; 2788 2789 /// \brief The nested name specifier containing the qualifier. 2790 NestedNameSpecifier *NNS; 2791 2792 /// \brief The identifier of the template. 2793 const IdentifierInfo *Name; 2794 2795 /// \brief - The number of template arguments named in this class 2796 /// template specialization. 2797 unsigned NumArgs; 2798 2799 const TemplateArgument *getArgBuffer() const { 2800 return reinterpret_cast<const TemplateArgument*>(this+1); 2801 } 2802 TemplateArgument *getArgBuffer() { 2803 return reinterpret_cast<TemplateArgument*>(this+1); 2804 } 2805 2806 DependentTemplateSpecializationType(ASTContext &Context, 2807 ElaboratedTypeKeyword Keyword, 2808 NestedNameSpecifier *NNS, 2809 const IdentifierInfo *Name, 2810 unsigned NumArgs, 2811 const TemplateArgument *Args, 2812 QualType Canon); 2813 2814 virtual void Destroy(ASTContext& C); 2815 2816 friend class ASTContext; // ASTContext creates these 2817 2818public: 2819 virtual ~DependentTemplateSpecializationType(); 2820 2821 NestedNameSpecifier *getQualifier() const { return NNS; } 2822 const IdentifierInfo *getIdentifier() const { return Name; } 2823 2824 /// \brief Retrieve the template arguments. 2825 const TemplateArgument *getArgs() const { 2826 return getArgBuffer(); 2827 } 2828 2829 /// \brief Retrieve the number of template arguments. 2830 unsigned getNumArgs() const { return NumArgs; } 2831 2832 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 2833 2834 typedef const TemplateArgument * iterator; 2835 iterator begin() const { return getArgs(); } 2836 iterator end() const; // inline in TemplateBase.h 2837 2838 bool isSugared() const { return false; } 2839 QualType desugar() const { return QualType(this, 0); } 2840 2841 void Profile(llvm::FoldingSetNodeID &ID) { 2842 Profile(ID, Context, getKeyword(), NNS, Name, NumArgs, getArgs()); 2843 } 2844 2845 static void Profile(llvm::FoldingSetNodeID &ID, 2846 ASTContext &Context, 2847 ElaboratedTypeKeyword Keyword, 2848 NestedNameSpecifier *Qualifier, 2849 const IdentifierInfo *Name, 2850 unsigned NumArgs, 2851 const TemplateArgument *Args); 2852 2853 static bool classof(const Type *T) { 2854 return T->getTypeClass() == DependentTemplateSpecialization; 2855 } 2856 static bool classof(const DependentTemplateSpecializationType *T) { 2857 return true; 2858 } 2859}; 2860 2861/// ObjCObjectType - Represents a class type in Objective C. 2862/// Every Objective C type is a combination of a base type and a 2863/// list of protocols. 2864/// 2865/// Given the following declarations: 2866/// @class C; 2867/// @protocol P; 2868/// 2869/// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType 2870/// with base C and no protocols. 2871/// 2872/// 'C<P>' is an ObjCObjectType with base C and protocol list [P]. 2873/// 2874/// 'id' is a TypedefType which is sugar for an ObjCPointerType whose 2875/// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType 2876/// and no protocols. 2877/// 2878/// 'id<P>' is an ObjCPointerType whose pointee is an ObjCObjecType 2879/// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually 2880/// this should get its own sugar class to better represent the source. 2881class ObjCObjectType : public Type { 2882 // Pad the bit count up so that NumProtocols is 2-byte aligned 2883 unsigned : BitsRemainingInType - 16; 2884 2885 /// \brief The number of protocols stored after the 2886 /// ObjCObjectPointerType node. 2887 /// 2888 /// These protocols are those written directly on the type. If 2889 /// protocol qualifiers ever become additive, the iterators will 2890 /// get kindof complicated. 2891 /// 2892 /// In the canonical object type, these are sorted alphabetically 2893 /// and uniqued. 2894 unsigned NumProtocols : 16; 2895 2896 /// Either a BuiltinType or an InterfaceType or sugar for either. 2897 QualType BaseType; 2898 2899 ObjCProtocolDecl * const *getProtocolStorage() const { 2900 return const_cast<ObjCObjectType*>(this)->getProtocolStorage(); 2901 } 2902 2903 ObjCProtocolDecl **getProtocolStorage(); 2904 2905protected: 2906 ObjCObjectType(QualType Canonical, QualType Base, 2907 ObjCProtocolDecl * const *Protocols, unsigned NumProtocols); 2908 2909 enum Nonce_ObjCInterface { Nonce_ObjCInterface }; 2910 ObjCObjectType(enum Nonce_ObjCInterface) 2911 : Type(ObjCInterface, QualType(), false), 2912 NumProtocols(0), 2913 BaseType(QualType(this_(), 0)) {} 2914 2915protected: 2916 Linkage getLinkageImpl() const; // key function 2917 2918public: 2919 /// getBaseType - Gets the base type of this object type. This is 2920 /// always (possibly sugar for) one of: 2921 /// - the 'id' builtin type (as opposed to the 'id' type visible to the 2922 /// user, which is a typedef for an ObjCPointerType) 2923 /// - the 'Class' builtin type (same caveat) 2924 /// - an ObjCObjectType (currently always an ObjCInterfaceType) 2925 QualType getBaseType() const { return BaseType; } 2926 2927 bool isObjCId() const { 2928 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); 2929 } 2930 bool isObjCClass() const { 2931 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); 2932 } 2933 bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } 2934 bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } 2935 bool isObjCUnqualifiedIdOrClass() const { 2936 if (!qual_empty()) return false; 2937 if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) 2938 return T->getKind() == BuiltinType::ObjCId || 2939 T->getKind() == BuiltinType::ObjCClass; 2940 return false; 2941 } 2942 bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } 2943 bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } 2944 2945 /// Gets the interface declaration for this object type, if the base type 2946 /// really is an interface. 2947 ObjCInterfaceDecl *getInterface() const; 2948 2949 typedef ObjCProtocolDecl * const *qual_iterator; 2950 2951 qual_iterator qual_begin() const { return getProtocolStorage(); } 2952 qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } 2953 2954 bool qual_empty() const { return getNumProtocols() == 0; } 2955 2956 /// getNumProtocols - Return the number of qualifying protocols in this 2957 /// interface type, or 0 if there are none. 2958 unsigned getNumProtocols() const { return NumProtocols; } 2959 2960 /// \brief Fetch a protocol by index. 2961 ObjCProtocolDecl *getProtocol(unsigned I) const { 2962 assert(I < getNumProtocols() && "Out-of-range protocol access"); 2963 return qual_begin()[I]; 2964 } 2965 2966 bool isSugared() const { return false; } 2967 QualType desugar() const { return QualType(this, 0); } 2968 2969 static bool classof(const Type *T) { 2970 return T->getTypeClass() == ObjCObject || 2971 T->getTypeClass() == ObjCInterface; 2972 } 2973 static bool classof(const ObjCObjectType *) { return true; } 2974}; 2975 2976/// ObjCObjectTypeImpl - A class providing a concrete implementation 2977/// of ObjCObjectType, so as to not increase the footprint of 2978/// ObjCInterfaceType. Code outside of ASTContext and the core type 2979/// system should not reference this type. 2980class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { 2981 friend class ASTContext; 2982 2983 // If anyone adds fields here, ObjCObjectType::getProtocolStorage() 2984 // will need to be modified. 2985 2986 ObjCObjectTypeImpl(QualType Canonical, QualType Base, 2987 ObjCProtocolDecl * const *Protocols, 2988 unsigned NumProtocols) 2989 : ObjCObjectType(Canonical, Base, Protocols, NumProtocols) {} 2990 2991public: 2992 void Destroy(ASTContext& C); // key function 2993 2994 void Profile(llvm::FoldingSetNodeID &ID); 2995 static void Profile(llvm::FoldingSetNodeID &ID, 2996 QualType Base, 2997 ObjCProtocolDecl *const *protocols, 2998 unsigned NumProtocols); 2999}; 3000 3001inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorage() { 3002 return reinterpret_cast<ObjCProtocolDecl**>( 3003 static_cast<ObjCObjectTypeImpl*>(this) + 1); 3004} 3005 3006/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 3007/// object oriented design. They basically correspond to C++ classes. There 3008/// are two kinds of interface types, normal interfaces like "NSString" and 3009/// qualified interfaces, which are qualified with a protocol list like 3010/// "NSString<NSCopyable, NSAmazing>". 3011/// 3012/// ObjCInterfaceType guarantees the following properties when considered 3013/// as a subtype of its superclass, ObjCObjectType: 3014/// - There are no protocol qualifiers. To reinforce this, code which 3015/// tries to invoke the protocol methods via an ObjCInterfaceType will 3016/// fail to compile. 3017/// - It is its own base type. That is, if T is an ObjCInterfaceType*, 3018/// T->getBaseType() == QualType(T, 0). 3019class ObjCInterfaceType : public ObjCObjectType { 3020 ObjCInterfaceDecl *Decl; 3021 3022 ObjCInterfaceType(const ObjCInterfaceDecl *D) 3023 : ObjCObjectType(Nonce_ObjCInterface), 3024 Decl(const_cast<ObjCInterfaceDecl*>(D)) {} 3025 friend class ASTContext; // ASTContext creates these. 3026public: 3027 void Destroy(ASTContext& C); // key function 3028 3029 /// getDecl - Get the declaration of this interface. 3030 ObjCInterfaceDecl *getDecl() const { return Decl; } 3031 3032 bool isSugared() const { return false; } 3033 QualType desugar() const { return QualType(this, 0); } 3034 3035 static bool classof(const Type *T) { 3036 return T->getTypeClass() == ObjCInterface; 3037 } 3038 static bool classof(const ObjCInterfaceType *) { return true; } 3039 3040 // Nonsense to "hide" certain members of ObjCObjectType within this 3041 // class. People asking for protocols on an ObjCInterfaceType are 3042 // not going to get what they want: ObjCInterfaceTypes are 3043 // guaranteed to have no protocols. 3044 enum { 3045 qual_iterator, 3046 qual_begin, 3047 qual_end, 3048 getNumProtocols, 3049 getProtocol 3050 }; 3051}; 3052 3053inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { 3054 if (const ObjCInterfaceType *T = 3055 getBaseType()->getAs<ObjCInterfaceType>()) 3056 return T->getDecl(); 3057 return 0; 3058} 3059 3060/// ObjCObjectPointerType - Used to represent a pointer to an 3061/// Objective C object. These are constructed from pointer 3062/// declarators when the pointee type is an ObjCObjectType (or sugar 3063/// for one). In addition, the 'id' and 'Class' types are typedefs 3064/// for these, and the protocol-qualified types 'id<P>' and 'Class<P>' 3065/// are translated into these. 3066/// 3067/// Pointers to pointers to Objective C objects are still PointerTypes; 3068/// only the first level of pointer gets it own type implementation. 3069class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 3070 QualType PointeeType; 3071 3072 ObjCObjectPointerType(QualType Canonical, QualType Pointee) 3073 : Type(ObjCObjectPointer, Canonical, false), 3074 PointeeType(Pointee) {} 3075 friend class ASTContext; // ASTContext creates these. 3076 3077protected: 3078 virtual Linkage getLinkageImpl() const; 3079 3080public: 3081 void Destroy(ASTContext& C); 3082 3083 /// getPointeeType - Gets the type pointed to by this ObjC pointer. 3084 /// The result will always be an ObjCObjectType or sugar thereof. 3085 QualType getPointeeType() const { return PointeeType; } 3086 3087 /// getObjCObjectType - Gets the type pointed to by this ObjC 3088 /// pointer. This method always returns non-null. 3089 /// 3090 /// This method is equivalent to getPointeeType() except that 3091 /// it discards any typedefs (or other sugar) between this 3092 /// type and the "outermost" object type. So for: 3093 /// @class A; @protocol P; @protocol Q; 3094 /// typedef A<P> AP; 3095 /// typedef A A1; 3096 /// typedef A1<P> A1P; 3097 /// typedef A1P<Q> A1PQ; 3098 /// For 'A*', getObjectType() will return 'A'. 3099 /// For 'A<P>*', getObjectType() will return 'A<P>'. 3100 /// For 'AP*', getObjectType() will return 'A<P>'. 3101 /// For 'A1*', getObjectType() will return 'A'. 3102 /// For 'A1<P>*', getObjectType() will return 'A1<P>'. 3103 /// For 'A1P*', getObjectType() will return 'A1<P>'. 3104 /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because 3105 /// adding protocols to a protocol-qualified base discards the 3106 /// old qualifiers (for now). But if it didn't, getObjectType() 3107 /// would return 'A1P<Q>' (and we'd have to make iterating over 3108 /// qualifiers more complicated). 3109 const ObjCObjectType *getObjectType() const { 3110 return PointeeType->getAs<ObjCObjectType>(); 3111 } 3112 3113 /// getInterfaceType - If this pointer points to an Objective C 3114 /// @interface type, gets the type for that interface. Any protocol 3115 /// qualifiers on the interface are ignored. 3116 /// 3117 /// \return null if the base type for this pointer is 'id' or 'Class' 3118 const ObjCInterfaceType *getInterfaceType() const { 3119 return getObjectType()->getBaseType()->getAs<ObjCInterfaceType>(); 3120 } 3121 3122 /// getInterfaceDecl - If this pointer points to an Objective @interface 3123 /// type, gets the declaration for that interface. 3124 /// 3125 /// \return null if the base type for this pointer is 'id' or 'Class' 3126 ObjCInterfaceDecl *getInterfaceDecl() const { 3127 return getObjectType()->getInterface(); 3128 } 3129 3130 /// isObjCIdType - True if this is equivalent to the 'id' type, i.e. if 3131 /// its object type is the primitive 'id' type with no protocols. 3132 bool isObjCIdType() const { 3133 return getObjectType()->isObjCUnqualifiedId(); 3134 } 3135 3136 /// isObjCClassType - True if this is equivalent to the 'Class' type, 3137 /// i.e. if its object tive is the primitive 'Class' type with no protocols. 3138 bool isObjCClassType() const { 3139 return getObjectType()->isObjCUnqualifiedClass(); 3140 } 3141 3142 /// isObjCQualifiedIdType - True if this is equivalent to 'id<P>' for some 3143 /// non-empty set of protocols. 3144 bool isObjCQualifiedIdType() const { 3145 return getObjectType()->isObjCQualifiedId(); 3146 } 3147 3148 /// isObjCQualifiedClassType - True if this is equivalent to 'Class<P>' for 3149 /// some non-empty set of protocols. 3150 bool isObjCQualifiedClassType() const { 3151 return getObjectType()->isObjCQualifiedClass(); 3152 } 3153 3154 /// An iterator over the qualifiers on the object type. Provided 3155 /// for convenience. This will always iterate over the full set of 3156 /// protocols on a type, not just those provided directly. 3157 typedef ObjCObjectType::qual_iterator qual_iterator; 3158 3159 qual_iterator qual_begin() const { 3160 return getObjectType()->qual_begin(); 3161 } 3162 qual_iterator qual_end() const { 3163 return getObjectType()->qual_end(); 3164 } 3165 bool qual_empty() const { return getObjectType()->qual_empty(); } 3166 3167 /// getNumProtocols - Return the number of qualifying protocols on 3168 /// the object type. 3169 unsigned getNumProtocols() const { 3170 return getObjectType()->getNumProtocols(); 3171 } 3172 3173 /// \brief Retrieve a qualifying protocol by index on the object 3174 /// type. 3175 ObjCProtocolDecl *getProtocol(unsigned I) const { 3176 return getObjectType()->getProtocol(I); 3177 } 3178 3179 bool isSugared() const { return false; } 3180 QualType desugar() const { return QualType(this, 0); } 3181 3182 void Profile(llvm::FoldingSetNodeID &ID) { 3183 Profile(ID, getPointeeType()); 3184 } 3185 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 3186 ID.AddPointer(T.getAsOpaquePtr()); 3187 } 3188 static bool classof(const Type *T) { 3189 return T->getTypeClass() == ObjCObjectPointer; 3190 } 3191 static bool classof(const ObjCObjectPointerType *) { return true; } 3192}; 3193 3194/// A qualifier set is used to build a set of qualifiers. 3195class QualifierCollector : public Qualifiers { 3196 ASTContext *Context; 3197 3198public: 3199 QualifierCollector(Qualifiers Qs = Qualifiers()) 3200 : Qualifiers(Qs), Context(0) {} 3201 QualifierCollector(ASTContext &Context, Qualifiers Qs = Qualifiers()) 3202 : Qualifiers(Qs), Context(&Context) {} 3203 3204 void setContext(ASTContext &C) { Context = &C; } 3205 3206 /// Collect any qualifiers on the given type and return an 3207 /// unqualified type. 3208 const Type *strip(QualType QT) { 3209 addFastQualifiers(QT.getLocalFastQualifiers()); 3210 if (QT.hasLocalNonFastQualifiers()) { 3211 const ExtQuals *EQ = QT.getExtQualsUnsafe(); 3212 Context = &EQ->getContext(); 3213 addQualifiers(EQ->getQualifiers()); 3214 return EQ->getBaseType(); 3215 } 3216 return QT.getTypePtrUnsafe(); 3217 } 3218 3219 /// Apply the collected qualifiers to the given type. 3220 QualType apply(QualType QT) const; 3221 3222 /// Apply the collected qualifiers to the given type. 3223 QualType apply(const Type* T) const; 3224 3225}; 3226 3227 3228// Inline function definitions. 3229 3230inline bool QualType::isCanonical() const { 3231 const Type *T = getTypePtr(); 3232 if (hasLocalQualifiers()) 3233 return T->isCanonicalUnqualified() && !isa<ArrayType>(T); 3234 return T->isCanonicalUnqualified(); 3235} 3236 3237inline bool QualType::isCanonicalAsParam() const { 3238 if (hasLocalQualifiers()) return false; 3239 const Type *T = getTypePtr(); 3240 return T->isCanonicalUnqualified() && 3241 !isa<FunctionType>(T) && !isa<ArrayType>(T); 3242} 3243 3244inline bool QualType::isConstQualified() const { 3245 return isLocalConstQualified() || 3246 getTypePtr()->getCanonicalTypeInternal().isLocalConstQualified(); 3247} 3248 3249inline bool QualType::isRestrictQualified() const { 3250 return isLocalRestrictQualified() || 3251 getTypePtr()->getCanonicalTypeInternal().isLocalRestrictQualified(); 3252} 3253 3254 3255inline bool QualType::isVolatileQualified() const { 3256 return isLocalVolatileQualified() || 3257 getTypePtr()->getCanonicalTypeInternal().isLocalVolatileQualified(); 3258} 3259 3260inline bool QualType::hasQualifiers() const { 3261 return hasLocalQualifiers() || 3262 getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers(); 3263} 3264 3265inline Qualifiers QualType::getQualifiers() const { 3266 Qualifiers Quals = getLocalQualifiers(); 3267 Quals.addQualifiers( 3268 getTypePtr()->getCanonicalTypeInternal().getLocalQualifiers()); 3269 return Quals; 3270} 3271 3272inline unsigned QualType::getCVRQualifiers() const { 3273 return getLocalCVRQualifiers() | 3274 getTypePtr()->getCanonicalTypeInternal().getLocalCVRQualifiers(); 3275} 3276 3277/// getCVRQualifiersThroughArrayTypes - If there are CVR qualifiers for this 3278/// type, returns them. Otherwise, if this is an array type, recurses 3279/// on the element type until some qualifiers have been found or a non-array 3280/// type reached. 3281inline unsigned QualType::getCVRQualifiersThroughArrayTypes() const { 3282 if (unsigned Quals = getCVRQualifiers()) 3283 return Quals; 3284 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3285 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3286 return AT->getElementType().getCVRQualifiersThroughArrayTypes(); 3287 return 0; 3288} 3289 3290inline void QualType::removeConst() { 3291 removeFastQualifiers(Qualifiers::Const); 3292} 3293 3294inline void QualType::removeRestrict() { 3295 removeFastQualifiers(Qualifiers::Restrict); 3296} 3297 3298inline void QualType::removeVolatile() { 3299 QualifierCollector Qc; 3300 const Type *Ty = Qc.strip(*this); 3301 if (Qc.hasVolatile()) { 3302 Qc.removeVolatile(); 3303 *this = Qc.apply(Ty); 3304 } 3305} 3306 3307inline void QualType::removeCVRQualifiers(unsigned Mask) { 3308 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 3309 3310 // Fast path: we don't need to touch the slow qualifiers. 3311 if (!(Mask & ~Qualifiers::FastMask)) { 3312 removeFastQualifiers(Mask); 3313 return; 3314 } 3315 3316 QualifierCollector Qc; 3317 const Type *Ty = Qc.strip(*this); 3318 Qc.removeCVRQualifiers(Mask); 3319 *this = Qc.apply(Ty); 3320} 3321 3322/// getAddressSpace - Return the address space of this type. 3323inline unsigned QualType::getAddressSpace() const { 3324 if (hasLocalNonFastQualifiers()) { 3325 const ExtQuals *EQ = getExtQualsUnsafe(); 3326 if (EQ->hasAddressSpace()) 3327 return EQ->getAddressSpace(); 3328 } 3329 3330 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3331 if (CT.hasLocalNonFastQualifiers()) { 3332 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 3333 if (EQ->hasAddressSpace()) 3334 return EQ->getAddressSpace(); 3335 } 3336 3337 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3338 return AT->getElementType().getAddressSpace(); 3339 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 3340 return RT->getAddressSpace(); 3341 return 0; 3342} 3343 3344/// getObjCGCAttr - Return the gc attribute of this type. 3345inline Qualifiers::GC QualType::getObjCGCAttr() const { 3346 if (hasLocalNonFastQualifiers()) { 3347 const ExtQuals *EQ = getExtQualsUnsafe(); 3348 if (EQ->hasObjCGCAttr()) 3349 return EQ->getObjCGCAttr(); 3350 } 3351 3352 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3353 if (CT.hasLocalNonFastQualifiers()) { 3354 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 3355 if (EQ->hasObjCGCAttr()) 3356 return EQ->getObjCGCAttr(); 3357 } 3358 3359 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3360 return AT->getElementType().getObjCGCAttr(); 3361 if (const ObjCObjectPointerType *PT = CT->getAs<ObjCObjectPointerType>()) 3362 return PT->getPointeeType().getObjCGCAttr(); 3363 // We most look at all pointer types, not just pointer to interface types. 3364 if (const PointerType *PT = CT->getAs<PointerType>()) 3365 return PT->getPointeeType().getObjCGCAttr(); 3366 return Qualifiers::GCNone; 3367} 3368 3369inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { 3370 if (const PointerType *PT = t.getAs<PointerType>()) { 3371 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 3372 return FT->getExtInfo(); 3373 } else if (const FunctionType *FT = t.getAs<FunctionType>()) 3374 return FT->getExtInfo(); 3375 3376 return FunctionType::ExtInfo(); 3377} 3378 3379inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { 3380 return getFunctionExtInfo(*t); 3381} 3382 3383/// isMoreQualifiedThan - Determine whether this type is more 3384/// qualified than the Other type. For example, "const volatile int" 3385/// is more qualified than "const int", "volatile int", and 3386/// "int". However, it is not more qualified than "const volatile 3387/// int". 3388inline bool QualType::isMoreQualifiedThan(QualType Other) const { 3389 // FIXME: work on arbitrary qualifiers 3390 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 3391 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 3392 if (getAddressSpace() != Other.getAddressSpace()) 3393 return false; 3394 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 3395} 3396 3397/// isAtLeastAsQualifiedAs - Determine whether this type is at last 3398/// as qualified as the Other type. For example, "const volatile 3399/// int" is at least as qualified as "const int", "volatile int", 3400/// "int", and "const volatile int". 3401inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 3402 // FIXME: work on arbitrary qualifiers 3403 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 3404 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 3405 if (getAddressSpace() != Other.getAddressSpace()) 3406 return false; 3407 return (MyQuals | OtherQuals) == MyQuals; 3408} 3409 3410/// getNonReferenceType - If Type is a reference type (e.g., const 3411/// int&), returns the type that the reference refers to ("const 3412/// int"). Otherwise, returns the type itself. This routine is used 3413/// throughout Sema to implement C++ 5p6: 3414/// 3415/// If an expression initially has the type "reference to T" (8.3.2, 3416/// 8.5.3), the type is adjusted to "T" prior to any further 3417/// analysis, the expression designates the object or function 3418/// denoted by the reference, and the expression is an lvalue. 3419inline QualType QualType::getNonReferenceType() const { 3420 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 3421 return RefType->getPointeeType(); 3422 else 3423 return *this; 3424} 3425 3426inline bool Type::isFunctionType() const { 3427 return isa<FunctionType>(CanonicalType); 3428} 3429inline bool Type::isPointerType() const { 3430 return isa<PointerType>(CanonicalType); 3431} 3432inline bool Type::isAnyPointerType() const { 3433 return isPointerType() || isObjCObjectPointerType(); 3434} 3435inline bool Type::isBlockPointerType() const { 3436 return isa<BlockPointerType>(CanonicalType); 3437} 3438inline bool Type::isReferenceType() const { 3439 return isa<ReferenceType>(CanonicalType); 3440} 3441inline bool Type::isLValueReferenceType() const { 3442 return isa<LValueReferenceType>(CanonicalType); 3443} 3444inline bool Type::isRValueReferenceType() const { 3445 return isa<RValueReferenceType>(CanonicalType); 3446} 3447inline bool Type::isFunctionPointerType() const { 3448 if (const PointerType* T = getAs<PointerType>()) 3449 return T->getPointeeType()->isFunctionType(); 3450 else 3451 return false; 3452} 3453inline bool Type::isMemberPointerType() const { 3454 return isa<MemberPointerType>(CanonicalType); 3455} 3456inline bool Type::isMemberFunctionPointerType() const { 3457 if (const MemberPointerType* T = getAs<MemberPointerType>()) 3458 return T->getPointeeType()->isFunctionType(); 3459 else 3460 return false; 3461} 3462inline bool Type::isArrayType() const { 3463 return isa<ArrayType>(CanonicalType); 3464} 3465inline bool Type::isConstantArrayType() const { 3466 return isa<ConstantArrayType>(CanonicalType); 3467} 3468inline bool Type::isIncompleteArrayType() const { 3469 return isa<IncompleteArrayType>(CanonicalType); 3470} 3471inline bool Type::isVariableArrayType() const { 3472 return isa<VariableArrayType>(CanonicalType); 3473} 3474inline bool Type::isDependentSizedArrayType() const { 3475 return isa<DependentSizedArrayType>(CanonicalType); 3476} 3477inline bool Type::isRecordType() const { 3478 return isa<RecordType>(CanonicalType); 3479} 3480inline bool Type::isAnyComplexType() const { 3481 return isa<ComplexType>(CanonicalType); 3482} 3483inline bool Type::isVectorType() const { 3484 return isa<VectorType>(CanonicalType); 3485} 3486inline bool Type::isExtVectorType() const { 3487 return isa<ExtVectorType>(CanonicalType); 3488} 3489inline bool Type::isObjCObjectPointerType() const { 3490 return isa<ObjCObjectPointerType>(CanonicalType); 3491} 3492inline bool Type::isObjCObjectType() const { 3493 return isa<ObjCObjectType>(CanonicalType); 3494} 3495inline bool Type::isObjCQualifiedIdType() const { 3496 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3497 return OPT->isObjCQualifiedIdType(); 3498 return false; 3499} 3500inline bool Type::isObjCQualifiedClassType() const { 3501 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3502 return OPT->isObjCQualifiedClassType(); 3503 return false; 3504} 3505inline bool Type::isObjCIdType() const { 3506 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3507 return OPT->isObjCIdType(); 3508 return false; 3509} 3510inline bool Type::isObjCClassType() const { 3511 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3512 return OPT->isObjCClassType(); 3513 return false; 3514} 3515inline bool Type::isObjCSelType() const { 3516 if (const PointerType *OPT = getAs<PointerType>()) 3517 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 3518 return false; 3519} 3520inline bool Type::isObjCBuiltinType() const { 3521 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 3522} 3523inline bool Type::isTemplateTypeParmType() const { 3524 return isa<TemplateTypeParmType>(CanonicalType); 3525} 3526 3527inline bool Type::isBuiltinType() const { 3528 return getAs<BuiltinType>(); 3529} 3530 3531inline bool Type::isSpecificBuiltinType(unsigned K) const { 3532 if (const BuiltinType *BT = getAs<BuiltinType>()) 3533 if (BT->getKind() == (BuiltinType::Kind) K) 3534 return true; 3535 return false; 3536} 3537 3538/// \brief Determines whether this is a type for which one can define 3539/// an overloaded operator. 3540inline bool Type::isOverloadableType() const { 3541 return isDependentType() || isRecordType() || isEnumeralType(); 3542} 3543 3544inline bool Type::hasPointerRepresentation() const { 3545 return (isPointerType() || isReferenceType() || isBlockPointerType() || 3546 isObjCObjectPointerType() || isNullPtrType()); 3547} 3548 3549inline bool Type::hasObjCPointerRepresentation() const { 3550 return isObjCObjectPointerType(); 3551} 3552 3553/// Insertion operator for diagnostics. This allows sending QualType's into a 3554/// diagnostic with <<. 3555inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 3556 QualType T) { 3557 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 3558 Diagnostic::ak_qualtype); 3559 return DB; 3560} 3561 3562/// Insertion operator for partial diagnostics. This allows sending QualType's 3563/// into a diagnostic with <<. 3564inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, 3565 QualType T) { 3566 PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 3567 Diagnostic::ak_qualtype); 3568 return PD; 3569} 3570 3571// Helper class template that is used by Type::getAs to ensure that one does 3572// not try to look through a qualified type to get to an array type. 3573template<typename T, 3574 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 3575 llvm::is_base_of<ArrayType, T>::value)> 3576struct ArrayType_cannot_be_used_with_getAs { }; 3577 3578template<typename T> 3579struct ArrayType_cannot_be_used_with_getAs<T, true>; 3580 3581/// Member-template getAs<specific type>'. 3582template <typename T> const T *Type::getAs() const { 3583 ArrayType_cannot_be_used_with_getAs<T> at; 3584 (void)at; 3585 3586 // If this is directly a T type, return it. 3587 if (const T *Ty = dyn_cast<T>(this)) 3588 return Ty; 3589 3590 // If the canonical form of this type isn't the right kind, reject it. 3591 if (!isa<T>(CanonicalType)) 3592 return 0; 3593 3594 // If this is a typedef for the type, strip the typedef off without 3595 // losing all typedef information. 3596 return cast<T>(getUnqualifiedDesugaredType()); 3597} 3598 3599} // end namespace clang 3600 3601#endif 3602