Type.h revision f540305c5d834ad9412b41805b81a74249b7c5af
1//===--- Type.h - C Language Family Type Representation ---------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Type interface and subclasses. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_CLANG_AST_TYPE_H 15#define LLVM_CLANG_AST_TYPE_H 16 17#include "clang/Basic/Diagnostic.h" 18#include "clang/Basic/IdentifierTable.h" 19#include "clang/Basic/Linkage.h" 20#include "clang/AST/NestedNameSpecifier.h" 21#include "clang/AST/Statistics.h" 22#include "clang/AST/TemplateName.h" 23#include "llvm/Support/Casting.h" 24#include "llvm/Support/type_traits.h" 25#include "llvm/ADT/APSInt.h" 26#include "llvm/ADT/FoldingSet.h" 27#include "llvm/ADT/PointerIntPair.h" 28#include "llvm/ADT/PointerUnion.h" 29 30using llvm::isa; 31using llvm::cast; 32using llvm::cast_or_null; 33using llvm::dyn_cast; 34using llvm::dyn_cast_or_null; 35namespace clang { 36 enum { 37 TypeAlignmentInBits = 3, 38 TypeAlignment = 1 << TypeAlignmentInBits 39 }; 40 class Type; 41 class ExtQuals; 42 class QualType; 43} 44 45namespace llvm { 46 template <typename T> 47 class PointerLikeTypeTraits; 48 template<> 49 class PointerLikeTypeTraits< ::clang::Type*> { 50 public: 51 static inline void *getAsVoidPointer(::clang::Type *P) { return P; } 52 static inline ::clang::Type *getFromVoidPointer(void *P) { 53 return static_cast< ::clang::Type*>(P); 54 } 55 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 56 }; 57 template<> 58 class PointerLikeTypeTraits< ::clang::ExtQuals*> { 59 public: 60 static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; } 61 static inline ::clang::ExtQuals *getFromVoidPointer(void *P) { 62 return static_cast< ::clang::ExtQuals*>(P); 63 } 64 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 65 }; 66 67 template <> 68 struct isPodLike<clang::QualType> { static const bool value = true; }; 69} 70 71namespace clang { 72 class ASTContext; 73 class TypedefDecl; 74 class TemplateDecl; 75 class TemplateTypeParmDecl; 76 class NonTypeTemplateParmDecl; 77 class TemplateTemplateParmDecl; 78 class TagDecl; 79 class RecordDecl; 80 class CXXRecordDecl; 81 class EnumDecl; 82 class FieldDecl; 83 class ObjCInterfaceDecl; 84 class ObjCProtocolDecl; 85 class ObjCMethodDecl; 86 class UnresolvedUsingTypenameDecl; 87 class Expr; 88 class Stmt; 89 class SourceLocation; 90 class StmtIteratorBase; 91 class TemplateArgument; 92 class TemplateArgumentLoc; 93 class TemplateArgumentListInfo; 94 class Type; 95 class QualifiedNameType; 96 struct PrintingPolicy; 97 98 template <typename> class CanQual; 99 typedef CanQual<Type> CanQualType; 100 101 // Provide forward declarations for all of the *Type classes 102#define TYPE(Class, Base) class Class##Type; 103#include "clang/AST/TypeNodes.def" 104 105/// Qualifiers - The collection of all-type qualifiers we support. 106/// Clang supports five independent qualifiers: 107/// * C99: const, volatile, and restrict 108/// * Embedded C (TR18037): address spaces 109/// * Objective C: the GC attributes (none, weak, or strong) 110class Qualifiers { 111public: 112 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 113 Const = 0x1, 114 Restrict = 0x2, 115 Volatile = 0x4, 116 CVRMask = Const | Volatile | Restrict 117 }; 118 119 enum GC { 120 GCNone = 0, 121 Weak, 122 Strong 123 }; 124 125 enum { 126 /// The maximum supported address space number. 127 /// 24 bits should be enough for anyone. 128 MaxAddressSpace = 0xffffffu, 129 130 /// The width of the "fast" qualifier mask. 131 FastWidth = 2, 132 133 /// The fast qualifier mask. 134 FastMask = (1 << FastWidth) - 1 135 }; 136 137 Qualifiers() : Mask(0) {} 138 139 static Qualifiers fromFastMask(unsigned Mask) { 140 Qualifiers Qs; 141 Qs.addFastQualifiers(Mask); 142 return Qs; 143 } 144 145 static Qualifiers fromCVRMask(unsigned CVR) { 146 Qualifiers Qs; 147 Qs.addCVRQualifiers(CVR); 148 return Qs; 149 } 150 151 // Deserialize qualifiers from an opaque representation. 152 static Qualifiers fromOpaqueValue(unsigned opaque) { 153 Qualifiers Qs; 154 Qs.Mask = opaque; 155 return Qs; 156 } 157 158 // Serialize these qualifiers into an opaque representation. 159 unsigned getAsOpaqueValue() const { 160 return Mask; 161 } 162 163 bool hasConst() const { return Mask & Const; } 164 void setConst(bool flag) { 165 Mask = (Mask & ~Const) | (flag ? Const : 0); 166 } 167 void removeConst() { Mask &= ~Const; } 168 void addConst() { Mask |= Const; } 169 170 bool hasVolatile() const { return Mask & Volatile; } 171 void setVolatile(bool flag) { 172 Mask = (Mask & ~Volatile) | (flag ? Volatile : 0); 173 } 174 void removeVolatile() { Mask &= ~Volatile; } 175 void addVolatile() { Mask |= Volatile; } 176 177 bool hasRestrict() const { return Mask & Restrict; } 178 void setRestrict(bool flag) { 179 Mask = (Mask & ~Restrict) | (flag ? Restrict : 0); 180 } 181 void removeRestrict() { Mask &= ~Restrict; } 182 void addRestrict() { Mask |= Restrict; } 183 184 bool hasCVRQualifiers() const { return getCVRQualifiers(); } 185 unsigned getCVRQualifiers() const { return Mask & CVRMask; } 186 void setCVRQualifiers(unsigned mask) { 187 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 188 Mask = (Mask & ~CVRMask) | mask; 189 } 190 void removeCVRQualifiers(unsigned mask) { 191 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 192 Mask &= ~mask; 193 } 194 void removeCVRQualifiers() { 195 removeCVRQualifiers(CVRMask); 196 } 197 void addCVRQualifiers(unsigned mask) { 198 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 199 Mask |= mask; 200 } 201 202 bool hasObjCGCAttr() const { return Mask & GCAttrMask; } 203 GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); } 204 void setObjCGCAttr(GC type) { 205 Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift); 206 } 207 void removeObjCGCAttr() { setObjCGCAttr(GCNone); } 208 void addObjCGCAttr(GC type) { 209 assert(type); 210 setObjCGCAttr(type); 211 } 212 213 bool hasAddressSpace() const { return Mask & AddressSpaceMask; } 214 unsigned getAddressSpace() const { return Mask >> AddressSpaceShift; } 215 void setAddressSpace(unsigned space) { 216 assert(space <= MaxAddressSpace); 217 Mask = (Mask & ~AddressSpaceMask) 218 | (((uint32_t) space) << AddressSpaceShift); 219 } 220 void removeAddressSpace() { setAddressSpace(0); } 221 void addAddressSpace(unsigned space) { 222 assert(space); 223 setAddressSpace(space); 224 } 225 226 // Fast qualifiers are those that can be allocated directly 227 // on a QualType object. 228 bool hasFastQualifiers() const { return getFastQualifiers(); } 229 unsigned getFastQualifiers() const { return Mask & FastMask; } 230 void setFastQualifiers(unsigned mask) { 231 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 232 Mask = (Mask & ~FastMask) | mask; 233 } 234 void removeFastQualifiers(unsigned mask) { 235 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 236 Mask &= ~mask; 237 } 238 void removeFastQualifiers() { 239 removeFastQualifiers(FastMask); 240 } 241 void addFastQualifiers(unsigned mask) { 242 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 243 Mask |= mask; 244 } 245 246 /// hasNonFastQualifiers - Return true if the set contains any 247 /// qualifiers which require an ExtQuals node to be allocated. 248 bool hasNonFastQualifiers() const { return Mask & ~FastMask; } 249 Qualifiers getNonFastQualifiers() const { 250 Qualifiers Quals = *this; 251 Quals.setFastQualifiers(0); 252 return Quals; 253 } 254 255 /// hasQualifiers - Return true if the set contains any qualifiers. 256 bool hasQualifiers() const { return Mask; } 257 bool empty() const { return !Mask; } 258 259 /// \brief Add the qualifiers from the given set to this set. 260 void addQualifiers(Qualifiers Q) { 261 // If the other set doesn't have any non-boolean qualifiers, just 262 // bit-or it in. 263 if (!(Q.Mask & ~CVRMask)) 264 Mask |= Q.Mask; 265 else { 266 Mask |= (Q.Mask & CVRMask); 267 if (Q.hasAddressSpace()) 268 addAddressSpace(Q.getAddressSpace()); 269 if (Q.hasObjCGCAttr()) 270 addObjCGCAttr(Q.getObjCGCAttr()); 271 } 272 } 273 274 bool operator==(Qualifiers Other) const { return Mask == Other.Mask; } 275 bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; } 276 277 operator bool() const { return hasQualifiers(); } 278 279 Qualifiers &operator+=(Qualifiers R) { 280 addQualifiers(R); 281 return *this; 282 } 283 284 // Union two qualifier sets. If an enumerated qualifier appears 285 // in both sets, use the one from the right. 286 friend Qualifiers operator+(Qualifiers L, Qualifiers R) { 287 L += R; 288 return L; 289 } 290 291 std::string getAsString() const; 292 std::string getAsString(const PrintingPolicy &Policy) const { 293 std::string Buffer; 294 getAsStringInternal(Buffer, Policy); 295 return Buffer; 296 } 297 void getAsStringInternal(std::string &S, const PrintingPolicy &Policy) const; 298 299 void Profile(llvm::FoldingSetNodeID &ID) const { 300 ID.AddInteger(Mask); 301 } 302 303private: 304 305 // bits: |0 1 2|3 .. 4|5 .. 31| 306 // |C R V|GCAttr|AddrSpace| 307 uint32_t Mask; 308 309 static const uint32_t GCAttrMask = 0x18; 310 static const uint32_t GCAttrShift = 3; 311 static const uint32_t AddressSpaceMask = ~(CVRMask | GCAttrMask); 312 static const uint32_t AddressSpaceShift = 5; 313}; 314 315 316/// ExtQuals - We can encode up to three bits in the low bits of a 317/// type pointer, but there are many more type qualifiers that we want 318/// to be able to apply to an arbitrary type. Therefore we have this 319/// struct, intended to be heap-allocated and used by QualType to 320/// store qualifiers. 321/// 322/// The current design tags the 'const' and 'restrict' qualifiers in 323/// two low bits on the QualType pointer; a third bit records whether 324/// the pointer is an ExtQuals node. 'const' was chosen because it is 325/// orders of magnitude more common than the other two qualifiers, in 326/// both library and user code. It's relatively rare to see 327/// 'restrict' in user code, but many standard C headers are saturated 328/// with 'restrict' declarations, so that representing them efficiently 329/// is a critical goal of this representation. 330class ExtQuals : public llvm::FoldingSetNode { 331 // NOTE: changing the fast qualifiers should be straightforward as 332 // long as you don't make 'const' non-fast. 333 // 1. Qualifiers: 334 // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). 335 // Fast qualifiers must occupy the low-order bits. 336 // b) Update Qualifiers::FastWidth and FastMask. 337 // 2. QualType: 338 // a) Update is{Volatile,Restrict}Qualified(), defined inline. 339 // b) Update remove{Volatile,Restrict}, defined near the end of 340 // this header. 341 // 3. ASTContext: 342 // a) Update get{Volatile,Restrict}Type. 343 344 /// Context - the context to which this set belongs. We save this 345 /// here so that QualifierCollector can use it to reapply extended 346 /// qualifiers to an arbitrary type without requiring a context to 347 /// be pushed through every single API dealing with qualifiers. 348 ASTContext& Context; 349 350 /// BaseType - the underlying type that this qualifies 351 const Type *BaseType; 352 353 /// Quals - the immutable set of qualifiers applied by this 354 /// node; always contains extended qualifiers. 355 Qualifiers Quals; 356 357public: 358 ExtQuals(ASTContext& Context, const Type *Base, Qualifiers Quals) 359 : Context(Context), BaseType(Base), Quals(Quals) 360 { 361 assert(Quals.hasNonFastQualifiers() 362 && "ExtQuals created with no fast qualifiers"); 363 assert(!Quals.hasFastQualifiers() 364 && "ExtQuals created with fast qualifiers"); 365 } 366 367 Qualifiers getQualifiers() const { return Quals; } 368 369 bool hasVolatile() const { return Quals.hasVolatile(); } 370 371 bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } 372 Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } 373 374 bool hasAddressSpace() const { return Quals.hasAddressSpace(); } 375 unsigned getAddressSpace() const { return Quals.getAddressSpace(); } 376 377 const Type *getBaseType() const { return BaseType; } 378 379 ASTContext &getContext() const { return Context; } 380 381public: 382 void Profile(llvm::FoldingSetNodeID &ID) const { 383 Profile(ID, getBaseType(), Quals); 384 } 385 static void Profile(llvm::FoldingSetNodeID &ID, 386 const Type *BaseType, 387 Qualifiers Quals) { 388 assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!"); 389 ID.AddPointer(BaseType); 390 Quals.Profile(ID); 391 } 392}; 393 394/// CallingConv - Specifies the calling convention that a function uses. 395enum CallingConv { 396 CC_Default, 397 CC_C, // __attribute__((cdecl)) 398 CC_X86StdCall, // __attribute__((stdcall)) 399 CC_X86FastCall // __attribute__((fastcall)) 400}; 401 402 403/// QualType - For efficiency, we don't store CV-qualified types as nodes on 404/// their own: instead each reference to a type stores the qualifiers. This 405/// greatly reduces the number of nodes we need to allocate for types (for 406/// example we only need one for 'int', 'const int', 'volatile int', 407/// 'const volatile int', etc). 408/// 409/// As an added efficiency bonus, instead of making this a pair, we 410/// just store the two bits we care about in the low bits of the 411/// pointer. To handle the packing/unpacking, we make QualType be a 412/// simple wrapper class that acts like a smart pointer. A third bit 413/// indicates whether there are extended qualifiers present, in which 414/// case the pointer points to a special structure. 415class QualType { 416 // Thankfully, these are efficiently composable. 417 llvm::PointerIntPair<llvm::PointerUnion<const Type*,const ExtQuals*>, 418 Qualifiers::FastWidth> Value; 419 420 const ExtQuals *getExtQualsUnsafe() const { 421 return Value.getPointer().get<const ExtQuals*>(); 422 } 423 424 const Type *getTypePtrUnsafe() const { 425 return Value.getPointer().get<const Type*>(); 426 } 427 428 QualType getUnqualifiedTypeSlow() const; 429 430 friend class QualifierCollector; 431public: 432 QualType() {} 433 434 QualType(const Type *Ptr, unsigned Quals) 435 : Value(Ptr, Quals) {} 436 QualType(const ExtQuals *Ptr, unsigned Quals) 437 : Value(Ptr, Quals) {} 438 439 unsigned getLocalFastQualifiers() const { return Value.getInt(); } 440 void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); } 441 442 /// Retrieves a pointer to the underlying (unqualified) type. 443 /// This should really return a const Type, but it's not worth 444 /// changing all the users right now. 445 Type *getTypePtr() const { 446 if (hasLocalNonFastQualifiers()) 447 return const_cast<Type*>(getExtQualsUnsafe()->getBaseType()); 448 return const_cast<Type*>(getTypePtrUnsafe()); 449 } 450 451 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 452 static QualType getFromOpaquePtr(void *Ptr) { 453 QualType T; 454 T.Value.setFromOpaqueValue(Ptr); 455 return T; 456 } 457 458 Type &operator*() const { 459 return *getTypePtr(); 460 } 461 462 Type *operator->() const { 463 return getTypePtr(); 464 } 465 466 bool isCanonical() const; 467 bool isCanonicalAsParam() const; 468 469 /// isNull - Return true if this QualType doesn't point to a type yet. 470 bool isNull() const { 471 return Value.getPointer().isNull(); 472 } 473 474 /// \brief Determine whether this particular QualType instance has the 475 /// "const" qualifier set, without looking through typedefs that may have 476 /// added "const" at a different level. 477 bool isLocalConstQualified() const { 478 return (getLocalFastQualifiers() & Qualifiers::Const); 479 } 480 481 /// \brief Determine whether this type is const-qualified. 482 bool isConstQualified() const; 483 484 /// \brief Determine whether this particular QualType instance has the 485 /// "restrict" qualifier set, without looking through typedefs that may have 486 /// added "restrict" at a different level. 487 bool isLocalRestrictQualified() const { 488 return (getLocalFastQualifiers() & Qualifiers::Restrict); 489 } 490 491 /// \brief Determine whether this type is restrict-qualified. 492 bool isRestrictQualified() const; 493 494 /// \brief Determine whether this particular QualType instance has the 495 /// "volatile" qualifier set, without looking through typedefs that may have 496 /// added "volatile" at a different level. 497 bool isLocalVolatileQualified() const { 498 return (hasLocalNonFastQualifiers() && getExtQualsUnsafe()->hasVolatile()); 499 } 500 501 /// \brief Determine whether this type is volatile-qualified. 502 bool isVolatileQualified() const; 503 504 /// \brief Determine whether this particular QualType instance has any 505 /// qualifiers, without looking through any typedefs that might add 506 /// qualifiers at a different level. 507 bool hasLocalQualifiers() const { 508 return getLocalFastQualifiers() || hasLocalNonFastQualifiers(); 509 } 510 511 /// \brief Determine whether this type has any qualifiers. 512 bool hasQualifiers() const; 513 514 /// \brief Determine whether this particular QualType instance has any 515 /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType 516 /// instance. 517 bool hasLocalNonFastQualifiers() const { 518 return Value.getPointer().is<const ExtQuals*>(); 519 } 520 521 /// \brief Retrieve the set of qualifiers local to this particular QualType 522 /// instance, not including any qualifiers acquired through typedefs or 523 /// other sugar. 524 Qualifiers getLocalQualifiers() const { 525 Qualifiers Quals; 526 if (hasLocalNonFastQualifiers()) 527 Quals = getExtQualsUnsafe()->getQualifiers(); 528 Quals.addFastQualifiers(getLocalFastQualifiers()); 529 return Quals; 530 } 531 532 /// \brief Retrieve the set of qualifiers applied to this type. 533 Qualifiers getQualifiers() const; 534 535 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 536 /// local to this particular QualType instance, not including any qualifiers 537 /// acquired through typedefs or other sugar. 538 unsigned getLocalCVRQualifiers() const { 539 unsigned CVR = getLocalFastQualifiers(); 540 if (isLocalVolatileQualified()) 541 CVR |= Qualifiers::Volatile; 542 return CVR; 543 } 544 545 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 546 /// applied to this type. 547 unsigned getCVRQualifiers() const; 548 549 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 550 /// applied to this type, looking through any number of unqualified array 551 /// types to their element types' qualifiers. 552 unsigned getCVRQualifiersThroughArrayTypes() const; 553 554 bool isConstant(ASTContext& Ctx) const { 555 return QualType::isConstant(*this, Ctx); 556 } 557 558 // Don't promise in the API that anything besides 'const' can be 559 // easily added. 560 561 /// addConst - add the specified type qualifier to this QualType. 562 void addConst() { 563 addFastQualifiers(Qualifiers::Const); 564 } 565 QualType withConst() const { 566 return withFastQualifiers(Qualifiers::Const); 567 } 568 569 void addFastQualifiers(unsigned TQs) { 570 assert(!(TQs & ~Qualifiers::FastMask) 571 && "non-fast qualifier bits set in mask!"); 572 Value.setInt(Value.getInt() | TQs); 573 } 574 575 // FIXME: The remove* functions are semantically broken, because they might 576 // not remove a qualifier stored on a typedef. Most of the with* functions 577 // have the same problem. 578 void removeConst(); 579 void removeVolatile(); 580 void removeRestrict(); 581 void removeCVRQualifiers(unsigned Mask); 582 583 void removeFastQualifiers() { Value.setInt(0); } 584 void removeFastQualifiers(unsigned Mask) { 585 assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers"); 586 Value.setInt(Value.getInt() & ~Mask); 587 } 588 589 // Creates a type with the given qualifiers in addition to any 590 // qualifiers already on this type. 591 QualType withFastQualifiers(unsigned TQs) const { 592 QualType T = *this; 593 T.addFastQualifiers(TQs); 594 return T; 595 } 596 597 // Creates a type with exactly the given fast qualifiers, removing 598 // any existing fast qualifiers. 599 QualType withExactFastQualifiers(unsigned TQs) const { 600 return withoutFastQualifiers().withFastQualifiers(TQs); 601 } 602 603 // Removes fast qualifiers, but leaves any extended qualifiers in place. 604 QualType withoutFastQualifiers() const { 605 QualType T = *this; 606 T.removeFastQualifiers(); 607 return T; 608 } 609 610 /// \brief Return this type with all of the instance-specific qualifiers 611 /// removed, but without removing any qualifiers that may have been applied 612 /// through typedefs. 613 QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); } 614 615 /// \brief Return the unqualified form of the given type, which might be 616 /// desugared to eliminate qualifiers introduced via typedefs. 617 QualType getUnqualifiedType() const { 618 QualType T = getLocalUnqualifiedType(); 619 if (!T.hasQualifiers()) 620 return T; 621 622 return getUnqualifiedTypeSlow(); 623 } 624 625 bool isMoreQualifiedThan(QualType Other) const; 626 bool isAtLeastAsQualifiedAs(QualType Other) const; 627 QualType getNonReferenceType() const; 628 629 /// getDesugaredType - Return the specified type with any "sugar" removed from 630 /// the type. This takes off typedefs, typeof's etc. If the outer level of 631 /// the type is already concrete, it returns it unmodified. This is similar 632 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 633 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 634 /// concrete. 635 /// 636 /// Qualifiers are left in place. 637 QualType getDesugaredType() const { 638 return QualType::getDesugaredType(*this); 639 } 640 641 /// operator==/!= - Indicate whether the specified types and qualifiers are 642 /// identical. 643 friend bool operator==(const QualType &LHS, const QualType &RHS) { 644 return LHS.Value == RHS.Value; 645 } 646 friend bool operator!=(const QualType &LHS, const QualType &RHS) { 647 return LHS.Value != RHS.Value; 648 } 649 std::string getAsString() const; 650 651 std::string getAsString(const PrintingPolicy &Policy) const { 652 std::string S; 653 getAsStringInternal(S, Policy); 654 return S; 655 } 656 void getAsStringInternal(std::string &Str, 657 const PrintingPolicy &Policy) const; 658 659 void dump(const char *s) const; 660 void dump() const; 661 662 void Profile(llvm::FoldingSetNodeID &ID) const { 663 ID.AddPointer(getAsOpaquePtr()); 664 } 665 666 /// getAddressSpace - Return the address space of this type. 667 inline unsigned getAddressSpace() const; 668 669 /// GCAttrTypesAttr - Returns gc attribute of this type. 670 inline Qualifiers::GC getObjCGCAttr() const; 671 672 /// isObjCGCWeak true when Type is objc's weak. 673 bool isObjCGCWeak() const { 674 return getObjCGCAttr() == Qualifiers::Weak; 675 } 676 677 /// isObjCGCStrong true when Type is objc's strong. 678 bool isObjCGCStrong() const { 679 return getObjCGCAttr() == Qualifiers::Strong; 680 } 681 682private: 683 // These methods are implemented in a separate translation unit; 684 // "static"-ize them to avoid creating temporary QualTypes in the 685 // caller. 686 static bool isConstant(QualType T, ASTContext& Ctx); 687 static QualType getDesugaredType(QualType T); 688}; 689 690} // end clang. 691 692namespace llvm { 693/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 694/// to a specific Type class. 695template<> struct simplify_type<const ::clang::QualType> { 696 typedef ::clang::Type* SimpleType; 697 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 698 return Val.getTypePtr(); 699 } 700}; 701template<> struct simplify_type< ::clang::QualType> 702 : public simplify_type<const ::clang::QualType> {}; 703 704// Teach SmallPtrSet that QualType is "basically a pointer". 705template<> 706class PointerLikeTypeTraits<clang::QualType> { 707public: 708 static inline void *getAsVoidPointer(clang::QualType P) { 709 return P.getAsOpaquePtr(); 710 } 711 static inline clang::QualType getFromVoidPointer(void *P) { 712 return clang::QualType::getFromOpaquePtr(P); 713 } 714 // Various qualifiers go in low bits. 715 enum { NumLowBitsAvailable = 0 }; 716}; 717 718} // end namespace llvm 719 720namespace clang { 721 722/// Type - This is the base class of the type hierarchy. A central concept 723/// with types is that each type always has a canonical type. A canonical type 724/// is the type with any typedef names stripped out of it or the types it 725/// references. For example, consider: 726/// 727/// typedef int foo; 728/// typedef foo* bar; 729/// 'int *' 'foo *' 'bar' 730/// 731/// There will be a Type object created for 'int'. Since int is canonical, its 732/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 733/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 734/// there is a PointerType that represents 'int*', which, like 'int', is 735/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 736/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 737/// is also 'int*'. 738/// 739/// Non-canonical types are useful for emitting diagnostics, without losing 740/// information about typedefs being used. Canonical types are useful for type 741/// comparisons (they allow by-pointer equality tests) and useful for reasoning 742/// about whether something has a particular form (e.g. is a function type), 743/// because they implicitly, recursively, strip all typedefs out of a type. 744/// 745/// Types, once created, are immutable. 746/// 747class Type { 748public: 749 enum TypeClass { 750#define TYPE(Class, Base) Class, 751#define LAST_TYPE(Class) TypeLast = Class, 752#define ABSTRACT_TYPE(Class, Base) 753#include "clang/AST/TypeNodes.def" 754 TagFirst = Record, TagLast = Enum 755 }; 756 757private: 758 QualType CanonicalType; 759 760 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 761 unsigned TC : 8; 762 763 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 764 /// Note that this should stay at the end of the ivars for Type so that 765 /// subclasses can pack their bitfields into the same word. 766 bool Dependent : 1; 767 768 Type(const Type&); // DO NOT IMPLEMENT. 769 void operator=(const Type&); // DO NOT IMPLEMENT. 770protected: 771 // silence VC++ warning C4355: 'this' : used in base member initializer list 772 Type *this_() { return this; } 773 Type(TypeClass tc, QualType Canonical, bool dependent) 774 : CanonicalType(Canonical.isNull() ? QualType(this_(), 0) : Canonical), 775 TC(tc), Dependent(dependent) {} 776 virtual ~Type() {} 777 virtual void Destroy(ASTContext& C); 778 friend class ASTContext; 779 780public: 781 TypeClass getTypeClass() const { return static_cast<TypeClass>(TC); } 782 783 bool isCanonicalUnqualified() const { 784 return CanonicalType.getTypePtr() == this; 785 } 786 787 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 788 /// object types, function types, and incomplete types. 789 790 /// \brief Determines whether the type describes an object in memory. 791 /// 792 /// Note that this definition of object type corresponds to the C++ 793 /// definition of object type, which includes incomplete types, as 794 /// opposed to the C definition (which does not include incomplete 795 /// types). 796 bool isObjectType() const; 797 798 /// isIncompleteType - Return true if this is an incomplete type. 799 /// A type that can describe objects, but which lacks information needed to 800 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 801 /// routine will need to determine if the size is actually required. 802 bool isIncompleteType() const; 803 804 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 805 /// type, in other words, not a function type. 806 bool isIncompleteOrObjectType() const { 807 return !isFunctionType(); 808 } 809 810 /// isPODType - Return true if this is a plain-old-data type (C++ 3.9p10). 811 bool isPODType() const; 812 813 /// isLiteralType - Return true if this is a literal type 814 /// (C++0x [basic.types]p10) 815 bool isLiteralType() const; 816 817 /// isVariablyModifiedType (C99 6.7.5.2p2) - Return true for variable array 818 /// types that have a non-constant expression. This does not include "[]". 819 bool isVariablyModifiedType() const; 820 821 /// Helper methods to distinguish type categories. All type predicates 822 /// operate on the canonical type, ignoring typedefs and qualifiers. 823 824 /// isSpecificBuiltinType - Test for a particular builtin type. 825 bool isSpecificBuiltinType(unsigned K) const; 826 827 /// isIntegerType() does *not* include complex integers (a GCC extension). 828 /// isComplexIntegerType() can be used to test for complex integers. 829 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 830 bool isEnumeralType() const; 831 bool isBooleanType() const; 832 bool isCharType() const; 833 bool isWideCharType() const; 834 bool isAnyCharacterType() const; 835 bool isIntegralType() const; 836 837 /// Floating point categories. 838 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 839 /// isComplexType() does *not* include complex integers (a GCC extension). 840 /// isComplexIntegerType() can be used to test for complex integers. 841 bool isComplexType() const; // C99 6.2.5p11 (complex) 842 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 843 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 844 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 845 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 846 bool isVoidType() const; // C99 6.2.5p19 847 bool isDerivedType() const; // C99 6.2.5p20 848 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 849 bool isAggregateType() const; 850 851 // Type Predicates: Check to see if this type is structurally the specified 852 // type, ignoring typedefs and qualifiers. 853 bool isFunctionType() const; 854 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 855 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 856 bool isPointerType() const; 857 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 858 bool isBlockPointerType() const; 859 bool isVoidPointerType() const; 860 bool isReferenceType() const; 861 bool isLValueReferenceType() const; 862 bool isRValueReferenceType() const; 863 bool isFunctionPointerType() const; 864 bool isMemberPointerType() const; 865 bool isMemberFunctionPointerType() const; 866 bool isArrayType() const; 867 bool isConstantArrayType() const; 868 bool isIncompleteArrayType() const; 869 bool isVariableArrayType() const; 870 bool isDependentSizedArrayType() const; 871 bool isRecordType() const; 872 bool isClassType() const; 873 bool isStructureType() const; 874 bool isUnionType() const; 875 bool isComplexIntegerType() const; // GCC _Complex integer type. 876 bool isVectorType() const; // GCC vector type. 877 bool isExtVectorType() const; // Extended vector type. 878 bool isObjCObjectPointerType() const; // Pointer to *any* ObjC object. 879 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 880 // for the common case. 881 bool isObjCInterfaceType() const; // NSString or NSString<foo> 882 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 883 bool isObjCQualifiedIdType() const; // id<foo> 884 bool isObjCQualifiedClassType() const; // Class<foo> 885 bool isObjCIdType() const; // id 886 bool isObjCClassType() const; // Class 887 bool isObjCSelType() const; // Class 888 bool isObjCBuiltinType() const; // 'id' or 'Class' 889 bool isTemplateTypeParmType() const; // C++ template type parameter 890 bool isNullPtrType() const; // C++0x nullptr_t 891 892 /// isDependentType - Whether this type is a dependent type, meaning 893 /// that its definition somehow depends on a template parameter 894 /// (C++ [temp.dep.type]). 895 bool isDependentType() const { return Dependent; } 896 bool isOverloadableType() const; 897 898 /// hasPointerRepresentation - Whether this type is represented 899 /// natively as a pointer; this includes pointers, references, block 900 /// pointers, and Objective-C interface, qualified id, and qualified 901 /// interface types, as well as nullptr_t. 902 bool hasPointerRepresentation() const; 903 904 /// hasObjCPointerRepresentation - Whether this type can represent 905 /// an objective pointer type for the purpose of GC'ability 906 bool hasObjCPointerRepresentation() const; 907 908 // Type Checking Functions: Check to see if this type is structurally the 909 // specified type, ignoring typedefs and qualifiers, and return a pointer to 910 // the best type we can. 911 const RecordType *getAsStructureType() const; 912 /// NOTE: getAs*ArrayType are methods on ASTContext. 913 const RecordType *getAsUnionType() const; 914 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 915 // The following is a convenience method that returns an ObjCObjectPointerType 916 // for object declared using an interface. 917 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 918 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 919 const ObjCInterfaceType *getAsObjCQualifiedInterfaceType() const; 920 const CXXRecordDecl *getCXXRecordDeclForPointerType() const; 921 922 // Member-template getAs<specific type>'. This scheme will eventually 923 // replace the specific getAsXXXX methods above. 924 // 925 // There are some specializations of this member template listed 926 // immediately following this class. 927 template <typename T> const T *getAs() const; 928 929 /// getAsPointerToObjCInterfaceType - If this is a pointer to an ObjC 930 /// interface, return the interface type, otherwise return null. 931 const ObjCInterfaceType *getAsPointerToObjCInterfaceType() const; 932 933 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 934 /// element type of the array, potentially with type qualifiers missing. 935 /// This method should never be used when type qualifiers are meaningful. 936 const Type *getArrayElementTypeNoTypeQual() const; 937 938 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 939 /// pointer, this returns the respective pointee. 940 QualType getPointeeType() const; 941 942 /// getNoReturnAttr - Returns true if the type has the noreturn attribute, 943 /// false otherwise. 944 bool getNoReturnAttr() const; 945 946 /// getCallConv - Returns the calling convention of the type if the type 947 /// is a function type, CC_Default otherwise. 948 CallingConv getCallConv() const; 949 950 /// getUnqualifiedDesugaredType() - Return the specified type with 951 /// any "sugar" removed from the type, removing any typedefs, 952 /// typeofs, etc., as well as any qualifiers. 953 const Type *getUnqualifiedDesugaredType() const; 954 955 /// More type predicates useful for type checking/promotion 956 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 957 958 /// isSignedIntegerType - Return true if this is an integer type that is 959 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 960 /// an enum decl which has a signed representation, or a vector of signed 961 /// integer element type. 962 bool isSignedIntegerType() const; 963 964 /// isUnsignedIntegerType - Return true if this is an integer type that is 965 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 966 /// decl which has an unsigned representation, or a vector of unsigned integer 967 /// element type. 968 bool isUnsignedIntegerType() const; 969 970 /// isConstantSizeType - Return true if this is not a variable sized type, 971 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 972 /// incomplete types. 973 bool isConstantSizeType() const; 974 975 /// isSpecifierType - Returns true if this type can be represented by some 976 /// set of type specifiers. 977 bool isSpecifierType() const; 978 979 const char *getTypeClassName() const; 980 981 /// \brief Determine the linkage of this type. 982 virtual Linkage getLinkage() const; 983 984 QualType getCanonicalTypeInternal() const { 985 return CanonicalType; 986 } 987 CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h 988 void dump() const; 989 static bool classof(const Type *) { return true; } 990}; 991 992template <> inline const TypedefType *Type::getAs() const { 993 return dyn_cast<TypedefType>(this); 994} 995 996// We can do canonical leaf types faster, because we don't have to 997// worry about preserving child type decoration. 998#define TYPE(Class, Base) 999#define LEAF_TYPE(Class) \ 1000template <> inline const Class##Type *Type::getAs() const { \ 1001 return dyn_cast<Class##Type>(CanonicalType); \ 1002} 1003#include "clang/AST/TypeNodes.def" 1004 1005 1006/// BuiltinType - This class is used for builtin types like 'int'. Builtin 1007/// types are always canonical and have a literal name field. 1008class BuiltinType : public Type { 1009public: 1010 enum Kind { 1011 Void, 1012 1013 Bool, // This is bool and/or _Bool. 1014 Char_U, // This is 'char' for targets where char is unsigned. 1015 UChar, // This is explicitly qualified unsigned char. 1016 Char16, // This is 'char16_t' for C++. 1017 Char32, // This is 'char32_t' for C++. 1018 UShort, 1019 UInt, 1020 ULong, 1021 ULongLong, 1022 UInt128, // __uint128_t 1023 1024 Char_S, // This is 'char' for targets where char is signed. 1025 SChar, // This is explicitly qualified signed char. 1026 WChar, // This is 'wchar_t' for C++. 1027 Short, 1028 Int, 1029 Long, 1030 LongLong, 1031 Int128, // __int128_t 1032 1033 Float, Double, LongDouble, 1034 1035 NullPtr, // This is the type of C++0x 'nullptr'. 1036 1037 Overload, // This represents the type of an overloaded function declaration. 1038 Dependent, // This represents the type of a type-dependent expression. 1039 1040 UndeducedAuto, // In C++0x, this represents the type of an auto variable 1041 // that has not been deduced yet. 1042 ObjCId, // This represents the ObjC 'id' type. 1043 ObjCClass, // This represents the ObjC 'Class' type. 1044 ObjCSel // This represents the ObjC 'SEL' type. 1045 }; 1046private: 1047 Kind TypeKind; 1048public: 1049 BuiltinType(Kind K) 1050 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent)), 1051 TypeKind(K) {} 1052 1053 Kind getKind() const { return TypeKind; } 1054 const char *getName(const LangOptions &LO) const; 1055 1056 bool isSugared() const { return false; } 1057 QualType desugar() const { return QualType(this, 0); } 1058 1059 bool isInteger() const { 1060 return TypeKind >= Bool && TypeKind <= Int128; 1061 } 1062 1063 bool isSignedInteger() const { 1064 return TypeKind >= Char_S && TypeKind <= Int128; 1065 } 1066 1067 bool isUnsignedInteger() const { 1068 return TypeKind >= Bool && TypeKind <= UInt128; 1069 } 1070 1071 bool isFloatingPoint() const { 1072 return TypeKind >= Float && TypeKind <= LongDouble; 1073 } 1074 1075 virtual Linkage getLinkage() const; 1076 1077 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1078 static bool classof(const BuiltinType *) { return true; } 1079}; 1080 1081/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1082/// types (_Complex float etc) as well as the GCC integer complex extensions. 1083/// 1084class ComplexType : public Type, public llvm::FoldingSetNode { 1085 QualType ElementType; 1086 ComplexType(QualType Element, QualType CanonicalPtr) : 1087 Type(Complex, CanonicalPtr, Element->isDependentType()), 1088 ElementType(Element) { 1089 } 1090 friend class ASTContext; // ASTContext creates these. 1091public: 1092 QualType getElementType() const { return ElementType; } 1093 1094 bool isSugared() const { return false; } 1095 QualType desugar() const { return QualType(this, 0); } 1096 1097 void Profile(llvm::FoldingSetNodeID &ID) { 1098 Profile(ID, getElementType()); 1099 } 1100 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1101 ID.AddPointer(Element.getAsOpaquePtr()); 1102 } 1103 1104 virtual Linkage getLinkage() const; 1105 1106 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1107 static bool classof(const ComplexType *) { return true; } 1108}; 1109 1110/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1111/// 1112class PointerType : public Type, public llvm::FoldingSetNode { 1113 QualType PointeeType; 1114 1115 PointerType(QualType Pointee, QualType CanonicalPtr) : 1116 Type(Pointer, CanonicalPtr, Pointee->isDependentType()), PointeeType(Pointee) { 1117 } 1118 friend class ASTContext; // ASTContext creates these. 1119public: 1120 1121 QualType getPointeeType() const { return PointeeType; } 1122 1123 bool isSugared() const { return false; } 1124 QualType desugar() const { return QualType(this, 0); } 1125 1126 void Profile(llvm::FoldingSetNodeID &ID) { 1127 Profile(ID, getPointeeType()); 1128 } 1129 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1130 ID.AddPointer(Pointee.getAsOpaquePtr()); 1131 } 1132 1133 virtual Linkage getLinkage() const; 1134 1135 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1136 static bool classof(const PointerType *) { return true; } 1137}; 1138 1139/// BlockPointerType - pointer to a block type. 1140/// This type is to represent types syntactically represented as 1141/// "void (^)(int)", etc. Pointee is required to always be a function type. 1142/// 1143class BlockPointerType : public Type, public llvm::FoldingSetNode { 1144 QualType PointeeType; // Block is some kind of pointer type 1145 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1146 Type(BlockPointer, CanonicalCls, Pointee->isDependentType()), 1147 PointeeType(Pointee) { 1148 } 1149 friend class ASTContext; // ASTContext creates these. 1150public: 1151 1152 // Get the pointee type. Pointee is required to always be a function type. 1153 QualType getPointeeType() const { return PointeeType; } 1154 1155 bool isSugared() const { return false; } 1156 QualType desugar() const { return QualType(this, 0); } 1157 1158 void Profile(llvm::FoldingSetNodeID &ID) { 1159 Profile(ID, getPointeeType()); 1160 } 1161 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1162 ID.AddPointer(Pointee.getAsOpaquePtr()); 1163 } 1164 1165 virtual Linkage getLinkage() const; 1166 1167 static bool classof(const Type *T) { 1168 return T->getTypeClass() == BlockPointer; 1169 } 1170 static bool classof(const BlockPointerType *) { return true; } 1171}; 1172 1173/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 1174/// 1175class ReferenceType : public Type, public llvm::FoldingSetNode { 1176 QualType PointeeType; 1177 1178 /// True if the type was originally spelled with an lvalue sigil. 1179 /// This is never true of rvalue references but can also be false 1180 /// on lvalue references because of C++0x [dcl.typedef]p9, 1181 /// as follows: 1182 /// 1183 /// typedef int &ref; // lvalue, spelled lvalue 1184 /// typedef int &&rvref; // rvalue 1185 /// ref &a; // lvalue, inner ref, spelled lvalue 1186 /// ref &&a; // lvalue, inner ref 1187 /// rvref &a; // lvalue, inner ref, spelled lvalue 1188 /// rvref &&a; // rvalue, inner ref 1189 bool SpelledAsLValue; 1190 1191 /// True if the inner type is a reference type. This only happens 1192 /// in non-canonical forms. 1193 bool InnerRef; 1194 1195protected: 1196 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 1197 bool SpelledAsLValue) : 1198 Type(tc, CanonicalRef, Referencee->isDependentType()), 1199 PointeeType(Referencee), SpelledAsLValue(SpelledAsLValue), 1200 InnerRef(Referencee->isReferenceType()) { 1201 } 1202public: 1203 bool isSpelledAsLValue() const { return SpelledAsLValue; } 1204 bool isInnerRef() const { return InnerRef; } 1205 1206 QualType getPointeeTypeAsWritten() const { return PointeeType; } 1207 QualType getPointeeType() const { 1208 // FIXME: this might strip inner qualifiers; okay? 1209 const ReferenceType *T = this; 1210 while (T->InnerRef) 1211 T = T->PointeeType->getAs<ReferenceType>(); 1212 return T->PointeeType; 1213 } 1214 1215 void Profile(llvm::FoldingSetNodeID &ID) { 1216 Profile(ID, PointeeType, SpelledAsLValue); 1217 } 1218 static void Profile(llvm::FoldingSetNodeID &ID, 1219 QualType Referencee, 1220 bool SpelledAsLValue) { 1221 ID.AddPointer(Referencee.getAsOpaquePtr()); 1222 ID.AddBoolean(SpelledAsLValue); 1223 } 1224 1225 virtual Linkage getLinkage() const; 1226 1227 static bool classof(const Type *T) { 1228 return T->getTypeClass() == LValueReference || 1229 T->getTypeClass() == RValueReference; 1230 } 1231 static bool classof(const ReferenceType *) { return true; } 1232}; 1233 1234/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 1235/// 1236class LValueReferenceType : public ReferenceType { 1237 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 1238 bool SpelledAsLValue) : 1239 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 1240 {} 1241 friend class ASTContext; // ASTContext creates these 1242public: 1243 bool isSugared() const { return false; } 1244 QualType desugar() const { return QualType(this, 0); } 1245 1246 static bool classof(const Type *T) { 1247 return T->getTypeClass() == LValueReference; 1248 } 1249 static bool classof(const LValueReferenceType *) { return true; } 1250}; 1251 1252/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 1253/// 1254class RValueReferenceType : public ReferenceType { 1255 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 1256 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 1257 } 1258 friend class ASTContext; // ASTContext creates these 1259public: 1260 bool isSugared() const { return false; } 1261 QualType desugar() const { return QualType(this, 0); } 1262 1263 static bool classof(const Type *T) { 1264 return T->getTypeClass() == RValueReference; 1265 } 1266 static bool classof(const RValueReferenceType *) { return true; } 1267}; 1268 1269/// MemberPointerType - C++ 8.3.3 - Pointers to members 1270/// 1271class MemberPointerType : public Type, public llvm::FoldingSetNode { 1272 QualType PointeeType; 1273 /// The class of which the pointee is a member. Must ultimately be a 1274 /// RecordType, but could be a typedef or a template parameter too. 1275 const Type *Class; 1276 1277 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 1278 Type(MemberPointer, CanonicalPtr, 1279 Cls->isDependentType() || Pointee->isDependentType()), 1280 PointeeType(Pointee), Class(Cls) { 1281 } 1282 friend class ASTContext; // ASTContext creates these. 1283public: 1284 1285 QualType getPointeeType() const { return PointeeType; } 1286 1287 const Type *getClass() const { return Class; } 1288 1289 bool isSugared() const { return false; } 1290 QualType desugar() const { return QualType(this, 0); } 1291 1292 void Profile(llvm::FoldingSetNodeID &ID) { 1293 Profile(ID, getPointeeType(), getClass()); 1294 } 1295 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 1296 const Type *Class) { 1297 ID.AddPointer(Pointee.getAsOpaquePtr()); 1298 ID.AddPointer(Class); 1299 } 1300 1301 virtual Linkage getLinkage() const; 1302 1303 static bool classof(const Type *T) { 1304 return T->getTypeClass() == MemberPointer; 1305 } 1306 static bool classof(const MemberPointerType *) { return true; } 1307}; 1308 1309/// ArrayType - C99 6.7.5.2 - Array Declarators. 1310/// 1311class ArrayType : public Type, public llvm::FoldingSetNode { 1312public: 1313 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 1314 /// an array with a static size (e.g. int X[static 4]), or an array 1315 /// with a star size (e.g. int X[*]). 1316 /// 'static' is only allowed on function parameters. 1317 enum ArraySizeModifier { 1318 Normal, Static, Star 1319 }; 1320private: 1321 /// ElementType - The element type of the array. 1322 QualType ElementType; 1323 1324 // NOTE: VC++ treats enums as signed, avoid using the ArraySizeModifier enum 1325 /// NOTE: These fields are packed into the bitfields space in the Type class. 1326 unsigned SizeModifier : 2; 1327 1328 /// IndexTypeQuals - Capture qualifiers in declarations like: 1329 /// 'int X[static restrict 4]'. For function parameters only. 1330 unsigned IndexTypeQuals : 3; 1331 1332protected: 1333 // C++ [temp.dep.type]p1: 1334 // A type is dependent if it is... 1335 // - an array type constructed from any dependent type or whose 1336 // size is specified by a constant expression that is 1337 // value-dependent, 1338 ArrayType(TypeClass tc, QualType et, QualType can, 1339 ArraySizeModifier sm, unsigned tq) 1340 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray), 1341 ElementType(et), SizeModifier(sm), IndexTypeQuals(tq) {} 1342 1343 friend class ASTContext; // ASTContext creates these. 1344public: 1345 QualType getElementType() const { return ElementType; } 1346 ArraySizeModifier getSizeModifier() const { 1347 return ArraySizeModifier(SizeModifier); 1348 } 1349 Qualifiers getIndexTypeQualifiers() const { 1350 return Qualifiers::fromCVRMask(IndexTypeQuals); 1351 } 1352 unsigned getIndexTypeCVRQualifiers() const { return IndexTypeQuals; } 1353 1354 virtual Linkage getLinkage() const; 1355 1356 static bool classof(const Type *T) { 1357 return T->getTypeClass() == ConstantArray || 1358 T->getTypeClass() == VariableArray || 1359 T->getTypeClass() == IncompleteArray || 1360 T->getTypeClass() == DependentSizedArray; 1361 } 1362 static bool classof(const ArrayType *) { return true; } 1363}; 1364 1365/// ConstantArrayType - This class represents the canonical version of 1366/// C arrays with a specified constant size. For example, the canonical 1367/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 1368/// type is 'int' and the size is 404. 1369class ConstantArrayType : public ArrayType { 1370 llvm::APInt Size; // Allows us to unique the type. 1371 1372 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 1373 ArraySizeModifier sm, unsigned tq) 1374 : ArrayType(ConstantArray, et, can, sm, tq), 1375 Size(size) {} 1376protected: 1377 ConstantArrayType(TypeClass tc, QualType et, QualType can, 1378 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 1379 : ArrayType(tc, et, can, sm, tq), Size(size) {} 1380 friend class ASTContext; // ASTContext creates these. 1381public: 1382 const llvm::APInt &getSize() const { return Size; } 1383 bool isSugared() const { return false; } 1384 QualType desugar() const { return QualType(this, 0); } 1385 1386 void Profile(llvm::FoldingSetNodeID &ID) { 1387 Profile(ID, getElementType(), getSize(), 1388 getSizeModifier(), getIndexTypeCVRQualifiers()); 1389 } 1390 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1391 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 1392 unsigned TypeQuals) { 1393 ID.AddPointer(ET.getAsOpaquePtr()); 1394 ID.AddInteger(ArraySize.getZExtValue()); 1395 ID.AddInteger(SizeMod); 1396 ID.AddInteger(TypeQuals); 1397 } 1398 static bool classof(const Type *T) { 1399 return T->getTypeClass() == ConstantArray; 1400 } 1401 static bool classof(const ConstantArrayType *) { return true; } 1402}; 1403 1404/// IncompleteArrayType - This class represents C arrays with an unspecified 1405/// size. For example 'int A[]' has an IncompleteArrayType where the element 1406/// type is 'int' and the size is unspecified. 1407class IncompleteArrayType : public ArrayType { 1408 1409 IncompleteArrayType(QualType et, QualType can, 1410 ArraySizeModifier sm, unsigned tq) 1411 : ArrayType(IncompleteArray, et, can, sm, tq) {} 1412 friend class ASTContext; // ASTContext creates these. 1413public: 1414 bool isSugared() const { return false; } 1415 QualType desugar() const { return QualType(this, 0); } 1416 1417 static bool classof(const Type *T) { 1418 return T->getTypeClass() == IncompleteArray; 1419 } 1420 static bool classof(const IncompleteArrayType *) { return true; } 1421 1422 friend class StmtIteratorBase; 1423 1424 void Profile(llvm::FoldingSetNodeID &ID) { 1425 Profile(ID, getElementType(), getSizeModifier(), 1426 getIndexTypeCVRQualifiers()); 1427 } 1428 1429 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1430 ArraySizeModifier SizeMod, unsigned TypeQuals) { 1431 ID.AddPointer(ET.getAsOpaquePtr()); 1432 ID.AddInteger(SizeMod); 1433 ID.AddInteger(TypeQuals); 1434 } 1435}; 1436 1437/// VariableArrayType - This class represents C arrays with a specified size 1438/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 1439/// Since the size expression is an arbitrary expression, we store it as such. 1440/// 1441/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 1442/// should not be: two lexically equivalent variable array types could mean 1443/// different things, for example, these variables do not have the same type 1444/// dynamically: 1445/// 1446/// void foo(int x) { 1447/// int Y[x]; 1448/// ++x; 1449/// int Z[x]; 1450/// } 1451/// 1452class VariableArrayType : public ArrayType { 1453 /// SizeExpr - An assignment expression. VLA's are only permitted within 1454 /// a function block. 1455 Stmt *SizeExpr; 1456 /// Brackets - The left and right array brackets. 1457 SourceRange Brackets; 1458 1459 VariableArrayType(QualType et, QualType can, Expr *e, 1460 ArraySizeModifier sm, unsigned tq, 1461 SourceRange brackets) 1462 : ArrayType(VariableArray, et, can, sm, tq), 1463 SizeExpr((Stmt*) e), Brackets(brackets) {} 1464 friend class ASTContext; // ASTContext creates these. 1465 virtual void Destroy(ASTContext& C); 1466 1467public: 1468 Expr *getSizeExpr() const { 1469 // We use C-style casts instead of cast<> here because we do not wish 1470 // to have a dependency of Type.h on Stmt.h/Expr.h. 1471 return (Expr*) SizeExpr; 1472 } 1473 SourceRange getBracketsRange() const { return Brackets; } 1474 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1475 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1476 1477 bool isSugared() const { return false; } 1478 QualType desugar() const { return QualType(this, 0); } 1479 1480 static bool classof(const Type *T) { 1481 return T->getTypeClass() == VariableArray; 1482 } 1483 static bool classof(const VariableArrayType *) { return true; } 1484 1485 friend class StmtIteratorBase; 1486 1487 void Profile(llvm::FoldingSetNodeID &ID) { 1488 assert(0 && "Cannnot unique VariableArrayTypes."); 1489 } 1490}; 1491 1492/// DependentSizedArrayType - This type represents an array type in 1493/// C++ whose size is a value-dependent expression. For example: 1494/// 1495/// \code 1496/// template<typename T, int Size> 1497/// class array { 1498/// T data[Size]; 1499/// }; 1500/// \endcode 1501/// 1502/// For these types, we won't actually know what the array bound is 1503/// until template instantiation occurs, at which point this will 1504/// become either a ConstantArrayType or a VariableArrayType. 1505class DependentSizedArrayType : public ArrayType { 1506 ASTContext &Context; 1507 1508 /// \brief An assignment expression that will instantiate to the 1509 /// size of the array. 1510 /// 1511 /// The expression itself might be NULL, in which case the array 1512 /// type will have its size deduced from an initializer. 1513 Stmt *SizeExpr; 1514 1515 /// Brackets - The left and right array brackets. 1516 SourceRange Brackets; 1517 1518 DependentSizedArrayType(ASTContext &Context, QualType et, QualType can, 1519 Expr *e, ArraySizeModifier sm, unsigned tq, 1520 SourceRange brackets) 1521 : ArrayType(DependentSizedArray, et, can, sm, tq), 1522 Context(Context), SizeExpr((Stmt*) e), Brackets(brackets) {} 1523 friend class ASTContext; // ASTContext creates these. 1524 virtual void Destroy(ASTContext& C); 1525 1526public: 1527 Expr *getSizeExpr() const { 1528 // We use C-style casts instead of cast<> here because we do not wish 1529 // to have a dependency of Type.h on Stmt.h/Expr.h. 1530 return (Expr*) SizeExpr; 1531 } 1532 SourceRange getBracketsRange() const { return Brackets; } 1533 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1534 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1535 1536 bool isSugared() const { return false; } 1537 QualType desugar() const { return QualType(this, 0); } 1538 1539 static bool classof(const Type *T) { 1540 return T->getTypeClass() == DependentSizedArray; 1541 } 1542 static bool classof(const DependentSizedArrayType *) { return true; } 1543 1544 friend class StmtIteratorBase; 1545 1546 1547 void Profile(llvm::FoldingSetNodeID &ID) { 1548 Profile(ID, Context, getElementType(), 1549 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 1550 } 1551 1552 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1553 QualType ET, ArraySizeModifier SizeMod, 1554 unsigned TypeQuals, Expr *E); 1555}; 1556 1557/// DependentSizedExtVectorType - This type represent an extended vector type 1558/// where either the type or size is dependent. For example: 1559/// @code 1560/// template<typename T, int Size> 1561/// class vector { 1562/// typedef T __attribute__((ext_vector_type(Size))) type; 1563/// } 1564/// @endcode 1565class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 1566 ASTContext &Context; 1567 Expr *SizeExpr; 1568 /// ElementType - The element type of the array. 1569 QualType ElementType; 1570 SourceLocation loc; 1571 1572 DependentSizedExtVectorType(ASTContext &Context, QualType ElementType, 1573 QualType can, Expr *SizeExpr, SourceLocation loc) 1574 : Type (DependentSizedExtVector, can, true), 1575 Context(Context), SizeExpr(SizeExpr), ElementType(ElementType), 1576 loc(loc) {} 1577 friend class ASTContext; 1578 virtual void Destroy(ASTContext& C); 1579 1580public: 1581 Expr *getSizeExpr() const { return SizeExpr; } 1582 QualType getElementType() const { return ElementType; } 1583 SourceLocation getAttributeLoc() const { return loc; } 1584 1585 bool isSugared() const { return false; } 1586 QualType desugar() const { return QualType(this, 0); } 1587 1588 static bool classof(const Type *T) { 1589 return T->getTypeClass() == DependentSizedExtVector; 1590 } 1591 static bool classof(const DependentSizedExtVectorType *) { return true; } 1592 1593 void Profile(llvm::FoldingSetNodeID &ID) { 1594 Profile(ID, Context, getElementType(), getSizeExpr()); 1595 } 1596 1597 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1598 QualType ElementType, Expr *SizeExpr); 1599}; 1600 1601 1602/// VectorType - GCC generic vector type. This type is created using 1603/// __attribute__((vector_size(n)), where "n" specifies the vector size in 1604/// bytes; or from an Altivec __vector or vector declaration. 1605/// Since the constructor takes the number of vector elements, the 1606/// client is responsible for converting the size into the number of elements. 1607class VectorType : public Type, public llvm::FoldingSetNode { 1608protected: 1609 /// ElementType - The element type of the vector. 1610 QualType ElementType; 1611 1612 /// NumElements - The number of elements in the vector. 1613 unsigned NumElements; 1614 1615 /// AltiVec - True if this is for an Altivec vector. 1616 bool AltiVec; 1617 1618 /// Pixel - True if this is for an Altivec vector pixel. 1619 bool Pixel; 1620 1621 VectorType(QualType vecType, unsigned nElements, QualType canonType, 1622 bool isAltiVec, bool isPixel) : 1623 Type(Vector, canonType, vecType->isDependentType()), 1624 ElementType(vecType), NumElements(nElements), 1625 AltiVec(isAltiVec), Pixel(isPixel) {} 1626 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 1627 QualType canonType, bool isAltiVec, bool isPixel) 1628 : Type(tc, canonType, vecType->isDependentType()), ElementType(vecType), 1629 NumElements(nElements), AltiVec(isAltiVec), Pixel(isPixel) {} 1630 friend class ASTContext; // ASTContext creates these. 1631public: 1632 1633 QualType getElementType() const { return ElementType; } 1634 unsigned getNumElements() const { return NumElements; } 1635 1636 bool isSugared() const { return false; } 1637 QualType desugar() const { return QualType(this, 0); } 1638 1639 bool isAltiVec() const { return AltiVec; } 1640 1641 bool isPixel() const { return Pixel; } 1642 1643 void Profile(llvm::FoldingSetNodeID &ID) { 1644 Profile(ID, getElementType(), getNumElements(), getTypeClass(), 1645 AltiVec, Pixel); 1646 } 1647 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 1648 unsigned NumElements, TypeClass TypeClass, 1649 bool isAltiVec, bool isPixel) { 1650 ID.AddPointer(ElementType.getAsOpaquePtr()); 1651 ID.AddInteger(NumElements); 1652 ID.AddInteger(TypeClass); 1653 ID.AddBoolean(isAltiVec); 1654 ID.AddBoolean(isPixel); 1655 } 1656 1657 virtual Linkage getLinkage() const; 1658 1659 static bool classof(const Type *T) { 1660 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 1661 } 1662 static bool classof(const VectorType *) { return true; } 1663}; 1664 1665/// ExtVectorType - Extended vector type. This type is created using 1666/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 1667/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 1668/// class enables syntactic extensions, like Vector Components for accessing 1669/// points, colors, and textures (modeled after OpenGL Shading Language). 1670class ExtVectorType : public VectorType { 1671 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 1672 VectorType(ExtVector, vecType, nElements, canonType, false, false) {} 1673 friend class ASTContext; // ASTContext creates these. 1674public: 1675 static int getPointAccessorIdx(char c) { 1676 switch (c) { 1677 default: return -1; 1678 case 'x': return 0; 1679 case 'y': return 1; 1680 case 'z': return 2; 1681 case 'w': return 3; 1682 } 1683 } 1684 static int getNumericAccessorIdx(char c) { 1685 switch (c) { 1686 default: return -1; 1687 case '0': return 0; 1688 case '1': return 1; 1689 case '2': return 2; 1690 case '3': return 3; 1691 case '4': return 4; 1692 case '5': return 5; 1693 case '6': return 6; 1694 case '7': return 7; 1695 case '8': return 8; 1696 case '9': return 9; 1697 case 'A': 1698 case 'a': return 10; 1699 case 'B': 1700 case 'b': return 11; 1701 case 'C': 1702 case 'c': return 12; 1703 case 'D': 1704 case 'd': return 13; 1705 case 'E': 1706 case 'e': return 14; 1707 case 'F': 1708 case 'f': return 15; 1709 } 1710 } 1711 1712 static int getAccessorIdx(char c) { 1713 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 1714 return getNumericAccessorIdx(c); 1715 } 1716 1717 bool isAccessorWithinNumElements(char c) const { 1718 if (int idx = getAccessorIdx(c)+1) 1719 return unsigned(idx-1) < NumElements; 1720 return false; 1721 } 1722 bool isSugared() const { return false; } 1723 QualType desugar() const { return QualType(this, 0); } 1724 1725 static bool classof(const Type *T) { 1726 return T->getTypeClass() == ExtVector; 1727 } 1728 static bool classof(const ExtVectorType *) { return true; } 1729}; 1730 1731/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 1732/// class of FunctionNoProtoType and FunctionProtoType. 1733/// 1734class FunctionType : public Type { 1735 /// SubClassData - This field is owned by the subclass, put here to pack 1736 /// tightly with the ivars in Type. 1737 bool SubClassData : 1; 1738 1739 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1740 /// other bitfields. 1741 /// The qualifiers are part of FunctionProtoType because... 1742 /// 1743 /// C++ 8.3.5p4: The return type, the parameter type list and the 1744 /// cv-qualifier-seq, [...], are part of the function type. 1745 /// 1746 unsigned TypeQuals : 3; 1747 1748 /// NoReturn - Indicates if the function type is attribute noreturn. 1749 unsigned NoReturn : 1; 1750 1751 /// CallConv - The calling convention used by the function. 1752 unsigned CallConv : 2; 1753 1754 // The type returned by the function. 1755 QualType ResultType; 1756protected: 1757 FunctionType(TypeClass tc, QualType res, bool SubclassInfo, 1758 unsigned typeQuals, QualType Canonical, bool Dependent, 1759 bool noReturn, CallingConv callConv) 1760 : Type(tc, Canonical, Dependent), 1761 SubClassData(SubclassInfo), TypeQuals(typeQuals), NoReturn(noReturn), 1762 CallConv(callConv), ResultType(res) {} 1763 bool getSubClassData() const { return SubClassData; } 1764 unsigned getTypeQuals() const { return TypeQuals; } 1765public: 1766 1767 QualType getResultType() const { return ResultType; } 1768 bool getNoReturnAttr() const { return NoReturn; } 1769 CallingConv getCallConv() const { return (CallingConv)CallConv; } 1770 1771 static llvm::StringRef getNameForCallConv(CallingConv CC); 1772 1773 static bool classof(const Type *T) { 1774 return T->getTypeClass() == FunctionNoProto || 1775 T->getTypeClass() == FunctionProto; 1776 } 1777 static bool classof(const FunctionType *) { return true; } 1778}; 1779 1780/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 1781/// no information available about its arguments. 1782class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 1783 FunctionNoProtoType(QualType Result, QualType Canonical, 1784 bool NoReturn = false, CallingConv CallConv = CC_Default) 1785 : FunctionType(FunctionNoProto, Result, false, 0, Canonical, 1786 /*Dependent=*/false, NoReturn, CallConv) {} 1787 friend class ASTContext; // ASTContext creates these. 1788public: 1789 // No additional state past what FunctionType provides. 1790 1791 bool isSugared() const { return false; } 1792 QualType desugar() const { return QualType(this, 0); } 1793 1794 void Profile(llvm::FoldingSetNodeID &ID) { 1795 Profile(ID, getResultType(), getNoReturnAttr(), getCallConv()); 1796 } 1797 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 1798 bool NoReturn, CallingConv CallConv) { 1799 ID.AddInteger(CallConv); 1800 ID.AddInteger(NoReturn); 1801 ID.AddPointer(ResultType.getAsOpaquePtr()); 1802 } 1803 1804 virtual Linkage getLinkage() const; 1805 1806 static bool classof(const Type *T) { 1807 return T->getTypeClass() == FunctionNoProto; 1808 } 1809 static bool classof(const FunctionNoProtoType *) { return true; } 1810}; 1811 1812/// FunctionProtoType - Represents a prototype with argument type info, e.g. 1813/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 1814/// arguments, not as having a single void argument. Such a type can have an 1815/// exception specification, but this specification is not part of the canonical 1816/// type. 1817class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 1818 /// hasAnyDependentType - Determine whether there are any dependent 1819 /// types within the arguments passed in. 1820 static bool hasAnyDependentType(const QualType *ArgArray, unsigned numArgs) { 1821 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 1822 if (ArgArray[Idx]->isDependentType()) 1823 return true; 1824 1825 return false; 1826 } 1827 1828 FunctionProtoType(QualType Result, const QualType *ArgArray, unsigned numArgs, 1829 bool isVariadic, unsigned typeQuals, bool hasExs, 1830 bool hasAnyExs, const QualType *ExArray, 1831 unsigned numExs, QualType Canonical, bool NoReturn, 1832 CallingConv CallConv) 1833 : FunctionType(FunctionProto, Result, isVariadic, typeQuals, Canonical, 1834 (Result->isDependentType() || 1835 hasAnyDependentType(ArgArray, numArgs)), NoReturn, 1836 CallConv), 1837 NumArgs(numArgs), NumExceptions(numExs), HasExceptionSpec(hasExs), 1838 AnyExceptionSpec(hasAnyExs) { 1839 // Fill in the trailing argument array. 1840 QualType *ArgInfo = reinterpret_cast<QualType*>(this+1); 1841 for (unsigned i = 0; i != numArgs; ++i) 1842 ArgInfo[i] = ArgArray[i]; 1843 // Fill in the exception array. 1844 QualType *Ex = ArgInfo + numArgs; 1845 for (unsigned i = 0; i != numExs; ++i) 1846 Ex[i] = ExArray[i]; 1847 } 1848 1849 /// NumArgs - The number of arguments this function has, not counting '...'. 1850 unsigned NumArgs : 20; 1851 1852 /// NumExceptions - The number of types in the exception spec, if any. 1853 unsigned NumExceptions : 10; 1854 1855 /// HasExceptionSpec - Whether this function has an exception spec at all. 1856 bool HasExceptionSpec : 1; 1857 1858 /// AnyExceptionSpec - Whether this function has a throw(...) spec. 1859 bool AnyExceptionSpec : 1; 1860 1861 /// ArgInfo - There is an variable size array after the class in memory that 1862 /// holds the argument types. 1863 1864 /// Exceptions - There is another variable size array after ArgInfo that 1865 /// holds the exception types. 1866 1867 friend class ASTContext; // ASTContext creates these. 1868 1869public: 1870 unsigned getNumArgs() const { return NumArgs; } 1871 QualType getArgType(unsigned i) const { 1872 assert(i < NumArgs && "Invalid argument number!"); 1873 return arg_type_begin()[i]; 1874 } 1875 1876 bool hasExceptionSpec() const { return HasExceptionSpec; } 1877 bool hasAnyExceptionSpec() const { return AnyExceptionSpec; } 1878 unsigned getNumExceptions() const { return NumExceptions; } 1879 QualType getExceptionType(unsigned i) const { 1880 assert(i < NumExceptions && "Invalid exception number!"); 1881 return exception_begin()[i]; 1882 } 1883 bool hasEmptyExceptionSpec() const { 1884 return hasExceptionSpec() && !hasAnyExceptionSpec() && 1885 getNumExceptions() == 0; 1886 } 1887 1888 bool isVariadic() const { return getSubClassData(); } 1889 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 1890 1891 typedef const QualType *arg_type_iterator; 1892 arg_type_iterator arg_type_begin() const { 1893 return reinterpret_cast<const QualType *>(this+1); 1894 } 1895 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 1896 1897 typedef const QualType *exception_iterator; 1898 exception_iterator exception_begin() const { 1899 // exceptions begin where arguments end 1900 return arg_type_end(); 1901 } 1902 exception_iterator exception_end() const { 1903 return exception_begin() + NumExceptions; 1904 } 1905 1906 bool isSugared() const { return false; } 1907 QualType desugar() const { return QualType(this, 0); } 1908 1909 virtual Linkage getLinkage() const; 1910 1911 static bool classof(const Type *T) { 1912 return T->getTypeClass() == FunctionProto; 1913 } 1914 static bool classof(const FunctionProtoType *) { return true; } 1915 1916 void Profile(llvm::FoldingSetNodeID &ID); 1917 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 1918 arg_type_iterator ArgTys, unsigned NumArgs, 1919 bool isVariadic, unsigned TypeQuals, 1920 bool hasExceptionSpec, bool anyExceptionSpec, 1921 unsigned NumExceptions, exception_iterator Exs, 1922 bool NoReturn, CallingConv CallConv); 1923}; 1924 1925 1926/// \brief Represents the dependent type named by a dependently-scoped 1927/// typename using declaration, e.g. 1928/// using typename Base<T>::foo; 1929/// Template instantiation turns these into the underlying type. 1930class UnresolvedUsingType : public Type { 1931 UnresolvedUsingTypenameDecl *Decl; 1932 1933 UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) 1934 : Type(UnresolvedUsing, QualType(), true), 1935 Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} 1936 friend class ASTContext; // ASTContext creates these. 1937public: 1938 1939 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 1940 1941 bool isSugared() const { return false; } 1942 QualType desugar() const { return QualType(this, 0); } 1943 1944 static bool classof(const Type *T) { 1945 return T->getTypeClass() == UnresolvedUsing; 1946 } 1947 static bool classof(const UnresolvedUsingType *) { return true; } 1948 1949 void Profile(llvm::FoldingSetNodeID &ID) { 1950 return Profile(ID, Decl); 1951 } 1952 static void Profile(llvm::FoldingSetNodeID &ID, 1953 UnresolvedUsingTypenameDecl *D) { 1954 ID.AddPointer(D); 1955 } 1956}; 1957 1958 1959class TypedefType : public Type { 1960 TypedefDecl *Decl; 1961protected: 1962 TypedefType(TypeClass tc, const TypedefDecl *D, QualType can) 1963 : Type(tc, can, can->isDependentType()), 1964 Decl(const_cast<TypedefDecl*>(D)) { 1965 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1966 } 1967 friend class ASTContext; // ASTContext creates these. 1968public: 1969 1970 TypedefDecl *getDecl() const { return Decl; } 1971 1972 /// LookThroughTypedefs - Return the ultimate type this typedef corresponds to 1973 /// potentially looking through *all* consecutive typedefs. This returns the 1974 /// sum of the type qualifiers, so if you have: 1975 /// typedef const int A; 1976 /// typedef volatile A B; 1977 /// looking through the typedefs for B will give you "const volatile A". 1978 QualType LookThroughTypedefs() const; 1979 1980 bool isSugared() const { return true; } 1981 QualType desugar() const; 1982 1983 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 1984 static bool classof(const TypedefType *) { return true; } 1985}; 1986 1987/// TypeOfExprType (GCC extension). 1988class TypeOfExprType : public Type { 1989 Expr *TOExpr; 1990 1991protected: 1992 TypeOfExprType(Expr *E, QualType can = QualType()); 1993 friend class ASTContext; // ASTContext creates these. 1994public: 1995 Expr *getUnderlyingExpr() const { return TOExpr; } 1996 1997 /// \brief Remove a single level of sugar. 1998 QualType desugar() const; 1999 2000 /// \brief Returns whether this type directly provides sugar. 2001 bool isSugared() const { return true; } 2002 2003 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 2004 static bool classof(const TypeOfExprType *) { return true; } 2005}; 2006 2007/// \brief Internal representation of canonical, dependent 2008/// typeof(expr) types. 2009/// 2010/// This class is used internally by the ASTContext to manage 2011/// canonical, dependent types, only. Clients will only see instances 2012/// of this class via TypeOfExprType nodes. 2013class DependentTypeOfExprType 2014 : public TypeOfExprType, public llvm::FoldingSetNode { 2015 ASTContext &Context; 2016 2017public: 2018 DependentTypeOfExprType(ASTContext &Context, Expr *E) 2019 : TypeOfExprType(E), Context(Context) { } 2020 2021 bool isSugared() const { return false; } 2022 QualType desugar() const { return QualType(this, 0); } 2023 2024 void Profile(llvm::FoldingSetNodeID &ID) { 2025 Profile(ID, Context, getUnderlyingExpr()); 2026 } 2027 2028 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2029 Expr *E); 2030}; 2031 2032/// TypeOfType (GCC extension). 2033class TypeOfType : public Type { 2034 QualType TOType; 2035 TypeOfType(QualType T, QualType can) 2036 : Type(TypeOf, can, T->isDependentType()), TOType(T) { 2037 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2038 } 2039 friend class ASTContext; // ASTContext creates these. 2040public: 2041 QualType getUnderlyingType() const { return TOType; } 2042 2043 /// \brief Remove a single level of sugar. 2044 QualType desugar() const { return getUnderlyingType(); } 2045 2046 /// \brief Returns whether this type directly provides sugar. 2047 bool isSugared() const { return true; } 2048 2049 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 2050 static bool classof(const TypeOfType *) { return true; } 2051}; 2052 2053/// DecltypeType (C++0x) 2054class DecltypeType : public Type { 2055 Expr *E; 2056 2057 // FIXME: We could get rid of UnderlyingType if we wanted to: We would have to 2058 // Move getDesugaredType to ASTContext so that it can call getDecltypeForExpr 2059 // from it. 2060 QualType UnderlyingType; 2061 2062protected: 2063 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 2064 friend class ASTContext; // ASTContext creates these. 2065public: 2066 Expr *getUnderlyingExpr() const { return E; } 2067 QualType getUnderlyingType() const { return UnderlyingType; } 2068 2069 /// \brief Remove a single level of sugar. 2070 QualType desugar() const { return getUnderlyingType(); } 2071 2072 /// \brief Returns whether this type directly provides sugar. 2073 bool isSugared() const { return !isDependentType(); } 2074 2075 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 2076 static bool classof(const DecltypeType *) { return true; } 2077}; 2078 2079/// \brief Internal representation of canonical, dependent 2080/// decltype(expr) types. 2081/// 2082/// This class is used internally by the ASTContext to manage 2083/// canonical, dependent types, only. Clients will only see instances 2084/// of this class via DecltypeType nodes. 2085class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 2086 ASTContext &Context; 2087 2088public: 2089 DependentDecltypeType(ASTContext &Context, Expr *E); 2090 2091 bool isSugared() const { return false; } 2092 QualType desugar() const { return QualType(this, 0); } 2093 2094 void Profile(llvm::FoldingSetNodeID &ID) { 2095 Profile(ID, Context, getUnderlyingExpr()); 2096 } 2097 2098 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2099 Expr *E); 2100}; 2101 2102class TagType : public Type { 2103 /// Stores the TagDecl associated with this type. The decl will 2104 /// point to the TagDecl that actually defines the entity (or is a 2105 /// definition in progress), if there is such a definition. The 2106 /// single-bit value will be non-zero when this tag is in the 2107 /// process of being defined. 2108 mutable llvm::PointerIntPair<TagDecl *, 1> decl; 2109 friend class ASTContext; 2110 friend class TagDecl; 2111 2112protected: 2113 TagType(TypeClass TC, const TagDecl *D, QualType can); 2114 2115public: 2116 TagDecl *getDecl() const { return decl.getPointer(); } 2117 2118 /// @brief Determines whether this type is in the process of being 2119 /// defined. 2120 bool isBeingDefined() const { return decl.getInt(); } 2121 void setBeingDefined(bool Def) const { decl.setInt(Def? 1 : 0); } 2122 2123 virtual Linkage getLinkage() const; 2124 2125 static bool classof(const Type *T) { 2126 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 2127 } 2128 static bool classof(const TagType *) { return true; } 2129 static bool classof(const RecordType *) { return true; } 2130 static bool classof(const EnumType *) { return true; } 2131}; 2132 2133/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 2134/// to detect TagType objects of structs/unions/classes. 2135class RecordType : public TagType { 2136protected: 2137 explicit RecordType(const RecordDecl *D) 2138 : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2139 explicit RecordType(TypeClass TC, RecordDecl *D) 2140 : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2141 friend class ASTContext; // ASTContext creates these. 2142public: 2143 2144 RecordDecl *getDecl() const { 2145 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 2146 } 2147 2148 // FIXME: This predicate is a helper to QualType/Type. It needs to 2149 // recursively check all fields for const-ness. If any field is declared 2150 // const, it needs to return false. 2151 bool hasConstFields() const { return false; } 2152 2153 // FIXME: RecordType needs to check when it is created that all fields are in 2154 // the same address space, and return that. 2155 unsigned getAddressSpace() const { return 0; } 2156 2157 bool isSugared() const { return false; } 2158 QualType desugar() const { return QualType(this, 0); } 2159 2160 static bool classof(const TagType *T); 2161 static bool classof(const Type *T) { 2162 return isa<TagType>(T) && classof(cast<TagType>(T)); 2163 } 2164 static bool classof(const RecordType *) { return true; } 2165}; 2166 2167/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 2168/// to detect TagType objects of enums. 2169class EnumType : public TagType { 2170 explicit EnumType(const EnumDecl *D) 2171 : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2172 friend class ASTContext; // ASTContext creates these. 2173public: 2174 2175 EnumDecl *getDecl() const { 2176 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 2177 } 2178 2179 bool isSugared() const { return false; } 2180 QualType desugar() const { return QualType(this, 0); } 2181 2182 static bool classof(const TagType *T); 2183 static bool classof(const Type *T) { 2184 return isa<TagType>(T) && classof(cast<TagType>(T)); 2185 } 2186 static bool classof(const EnumType *) { return true; } 2187}; 2188 2189/// ElaboratedType - A non-canonical type used to represents uses of 2190/// elaborated type specifiers in C++. For example: 2191/// 2192/// void foo(union MyUnion); 2193/// ^^^^^^^^^^^^^ 2194/// 2195/// At the moment, for efficiency we do not create elaborated types in 2196/// C, since outside of typedefs all references to structs would 2197/// necessarily be elaborated. 2198class ElaboratedType : public Type, public llvm::FoldingSetNode { 2199public: 2200 enum TagKind { 2201 TK_struct, 2202 TK_union, 2203 TK_class, 2204 TK_enum 2205 }; 2206 2207private: 2208 /// The tag that was used in this elaborated type specifier. 2209 TagKind Tag; 2210 2211 /// The underlying type. 2212 QualType UnderlyingType; 2213 2214 explicit ElaboratedType(QualType Ty, TagKind Tag, QualType Canon) 2215 : Type(Elaborated, Canon, Canon->isDependentType()), 2216 Tag(Tag), UnderlyingType(Ty) { } 2217 friend class ASTContext; // ASTContext creates these. 2218 2219public: 2220 TagKind getTagKind() const { return Tag; } 2221 QualType getUnderlyingType() const { return UnderlyingType; } 2222 2223 /// \brief Remove a single level of sugar. 2224 QualType desugar() const { return getUnderlyingType(); } 2225 2226 /// \brief Returns whether this type directly provides sugar. 2227 bool isSugared() const { return true; } 2228 2229 static const char *getNameForTagKind(TagKind Kind) { 2230 switch (Kind) { 2231 default: assert(0 && "Unknown TagKind!"); 2232 case TK_struct: return "struct"; 2233 case TK_union: return "union"; 2234 case TK_class: return "class"; 2235 case TK_enum: return "enum"; 2236 } 2237 } 2238 2239 void Profile(llvm::FoldingSetNodeID &ID) { 2240 Profile(ID, getUnderlyingType(), getTagKind()); 2241 } 2242 static void Profile(llvm::FoldingSetNodeID &ID, QualType T, TagKind Tag) { 2243 ID.AddPointer(T.getAsOpaquePtr()); 2244 ID.AddInteger(Tag); 2245 } 2246 2247 static bool classof(const ElaboratedType*) { return true; } 2248 static bool classof(const Type *T) { return T->getTypeClass() == Elaborated; } 2249}; 2250 2251class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2252 unsigned Depth : 15; 2253 unsigned Index : 16; 2254 unsigned ParameterPack : 1; 2255 IdentifierInfo *Name; 2256 2257 TemplateTypeParmType(unsigned D, unsigned I, bool PP, IdentifierInfo *N, 2258 QualType Canon) 2259 : Type(TemplateTypeParm, Canon, /*Dependent=*/true), 2260 Depth(D), Index(I), ParameterPack(PP), Name(N) { } 2261 2262 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 2263 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true), 2264 Depth(D), Index(I), ParameterPack(PP), Name(0) { } 2265 2266 friend class ASTContext; // ASTContext creates these 2267 2268public: 2269 unsigned getDepth() const { return Depth; } 2270 unsigned getIndex() const { return Index; } 2271 bool isParameterPack() const { return ParameterPack; } 2272 IdentifierInfo *getName() const { return Name; } 2273 2274 bool isSugared() const { return false; } 2275 QualType desugar() const { return QualType(this, 0); } 2276 2277 void Profile(llvm::FoldingSetNodeID &ID) { 2278 Profile(ID, Depth, Index, ParameterPack, Name); 2279 } 2280 2281 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 2282 unsigned Index, bool ParameterPack, 2283 IdentifierInfo *Name) { 2284 ID.AddInteger(Depth); 2285 ID.AddInteger(Index); 2286 ID.AddBoolean(ParameterPack); 2287 ID.AddPointer(Name); 2288 } 2289 2290 static bool classof(const Type *T) { 2291 return T->getTypeClass() == TemplateTypeParm; 2292 } 2293 static bool classof(const TemplateTypeParmType *T) { return true; } 2294}; 2295 2296/// \brief Represents the result of substituting a type for a template 2297/// type parameter. 2298/// 2299/// Within an instantiated template, all template type parameters have 2300/// been replaced with these. They are used solely to record that a 2301/// type was originally written as a template type parameter; 2302/// therefore they are never canonical. 2303class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2304 // The original type parameter. 2305 const TemplateTypeParmType *Replaced; 2306 2307 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 2308 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType()), 2309 Replaced(Param) { } 2310 2311 friend class ASTContext; 2312 2313public: 2314 IdentifierInfo *getName() const { return Replaced->getName(); } 2315 2316 /// Gets the template parameter that was substituted for. 2317 const TemplateTypeParmType *getReplacedParameter() const { 2318 return Replaced; 2319 } 2320 2321 /// Gets the type that was substituted for the template 2322 /// parameter. 2323 QualType getReplacementType() const { 2324 return getCanonicalTypeInternal(); 2325 } 2326 2327 bool isSugared() const { return true; } 2328 QualType desugar() const { return getReplacementType(); } 2329 2330 void Profile(llvm::FoldingSetNodeID &ID) { 2331 Profile(ID, getReplacedParameter(), getReplacementType()); 2332 } 2333 static void Profile(llvm::FoldingSetNodeID &ID, 2334 const TemplateTypeParmType *Replaced, 2335 QualType Replacement) { 2336 ID.AddPointer(Replaced); 2337 ID.AddPointer(Replacement.getAsOpaquePtr()); 2338 } 2339 2340 static bool classof(const Type *T) { 2341 return T->getTypeClass() == SubstTemplateTypeParm; 2342 } 2343 static bool classof(const SubstTemplateTypeParmType *T) { return true; } 2344}; 2345 2346/// \brief Represents the type of a template specialization as written 2347/// in the source code. 2348/// 2349/// Template specialization types represent the syntactic form of a 2350/// template-id that refers to a type, e.g., @c vector<int>. Some 2351/// template specialization types are syntactic sugar, whose canonical 2352/// type will point to some other type node that represents the 2353/// instantiation or class template specialization. For example, a 2354/// class template specialization type of @c vector<int> will refer to 2355/// a tag type for the instantiation 2356/// @c std::vector<int, std::allocator<int>>. 2357/// 2358/// Other template specialization types, for which the template name 2359/// is dependent, may be canonical types. These types are always 2360/// dependent. 2361class TemplateSpecializationType 2362 : public Type, public llvm::FoldingSetNode { 2363 2364 // FIXME: Currently needed for profiling expressions; can we avoid this? 2365 ASTContext &Context; 2366 2367 /// \brief The name of the template being specialized. 2368 TemplateName Template; 2369 2370 /// \brief - The number of template arguments named in this class 2371 /// template specialization. 2372 unsigned NumArgs; 2373 2374 TemplateSpecializationType(ASTContext &Context, 2375 TemplateName T, 2376 const TemplateArgument *Args, 2377 unsigned NumArgs, QualType Canon); 2378 2379 virtual void Destroy(ASTContext& C); 2380 2381 friend class ASTContext; // ASTContext creates these 2382 2383public: 2384 /// \brief Determine whether any of the given template arguments are 2385 /// dependent. 2386 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 2387 unsigned NumArgs); 2388 2389 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 2390 unsigned NumArgs); 2391 2392 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &); 2393 2394 /// \brief Print a template argument list, including the '<' and '>' 2395 /// enclosing the template arguments. 2396 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 2397 unsigned NumArgs, 2398 const PrintingPolicy &Policy); 2399 2400 static std::string PrintTemplateArgumentList(const TemplateArgumentLoc *Args, 2401 unsigned NumArgs, 2402 const PrintingPolicy &Policy); 2403 2404 static std::string PrintTemplateArgumentList(const TemplateArgumentListInfo &, 2405 const PrintingPolicy &Policy); 2406 2407 typedef const TemplateArgument * iterator; 2408 2409 iterator begin() const { return getArgs(); } 2410 iterator end() const; 2411 2412 /// \brief Retrieve the name of the template that we are specializing. 2413 TemplateName getTemplateName() const { return Template; } 2414 2415 /// \brief Retrieve the template arguments. 2416 const TemplateArgument *getArgs() const { 2417 return reinterpret_cast<const TemplateArgument *>(this + 1); 2418 } 2419 2420 /// \brief Retrieve the number of template arguments. 2421 unsigned getNumArgs() const { return NumArgs; } 2422 2423 /// \brief Retrieve a specific template argument as a type. 2424 /// \precondition @c isArgType(Arg) 2425 const TemplateArgument &getArg(unsigned Idx) const; 2426 2427 bool isSugared() const { return !isDependentType(); } 2428 QualType desugar() const { return getCanonicalTypeInternal(); } 2429 2430 void Profile(llvm::FoldingSetNodeID &ID) { 2431 Profile(ID, Template, getArgs(), NumArgs, Context); 2432 } 2433 2434 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 2435 const TemplateArgument *Args, unsigned NumArgs, 2436 ASTContext &Context); 2437 2438 static bool classof(const Type *T) { 2439 return T->getTypeClass() == TemplateSpecialization; 2440 } 2441 static bool classof(const TemplateSpecializationType *T) { return true; } 2442}; 2443 2444/// \brief The injected class name of a C++ class template. Used to 2445/// record that a type was spelled with a bare identifier rather than 2446/// as a template-id; the equivalent for non-templated classes is just 2447/// RecordType. 2448/// 2449/// For consistency, template instantiation turns these into RecordTypes. 2450/// 2451/// The desugared form is always a unqualified TemplateSpecializationType. 2452/// The canonical form is always either a TemplateSpecializationType 2453/// (when dependent) or a RecordType (otherwise). 2454class InjectedClassNameType : public Type { 2455 CXXRecordDecl *Decl; 2456 2457 QualType UnderlyingType; 2458 2459 friend class ASTContext; // ASTContext creates these. 2460 InjectedClassNameType(CXXRecordDecl *D, QualType TST, QualType Canon) 2461 : Type(InjectedClassName, Canon, Canon->isDependentType()), 2462 Decl(D), UnderlyingType(TST) { 2463 assert(isa<TemplateSpecializationType>(TST)); 2464 assert(!TST.hasQualifiers()); 2465 assert(TST->getCanonicalTypeInternal() == Canon); 2466 } 2467 2468public: 2469 QualType getUnderlyingType() const { return UnderlyingType; } 2470 const TemplateSpecializationType *getUnderlyingTST() const { 2471 return cast<TemplateSpecializationType>(UnderlyingType.getTypePtr()); 2472 } 2473 2474 CXXRecordDecl *getDecl() const { return Decl; } 2475 2476 bool isSugared() const { return true; } 2477 QualType desugar() const { return UnderlyingType; } 2478 2479 static bool classof(const Type *T) { 2480 return T->getTypeClass() == InjectedClassName; 2481 } 2482 static bool classof(const InjectedClassNameType *T) { return true; } 2483}; 2484 2485/// \brief Represents a type that was referred to via a qualified 2486/// name, e.g., N::M::type. 2487/// 2488/// This type is used to keep track of a type name as written in the 2489/// source code, including any nested-name-specifiers. The type itself 2490/// is always "sugar", used to express what was written in the source 2491/// code but containing no additional semantic information. 2492class QualifiedNameType : public Type, public llvm::FoldingSetNode { 2493 /// \brief The nested name specifier containing the qualifier. 2494 NestedNameSpecifier *NNS; 2495 2496 /// \brief The type that this qualified name refers to. 2497 QualType NamedType; 2498 2499 QualifiedNameType(NestedNameSpecifier *NNS, QualType NamedType, 2500 QualType CanonType) 2501 : Type(QualifiedName, CanonType, NamedType->isDependentType()), 2502 NNS(NNS), NamedType(NamedType) { } 2503 2504 friend class ASTContext; // ASTContext creates these 2505 2506public: 2507 /// \brief Retrieve the qualification on this type. 2508 NestedNameSpecifier *getQualifier() const { return NNS; } 2509 2510 /// \brief Retrieve the type named by the qualified-id. 2511 QualType getNamedType() const { return NamedType; } 2512 2513 /// \brief Remove a single level of sugar. 2514 QualType desugar() const { return getNamedType(); } 2515 2516 /// \brief Returns whether this type directly provides sugar. 2517 bool isSugared() const { return true; } 2518 2519 void Profile(llvm::FoldingSetNodeID &ID) { 2520 Profile(ID, NNS, NamedType); 2521 } 2522 2523 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 2524 QualType NamedType) { 2525 ID.AddPointer(NNS); 2526 NamedType.Profile(ID); 2527 } 2528 2529 static bool classof(const Type *T) { 2530 return T->getTypeClass() == QualifiedName; 2531 } 2532 static bool classof(const QualifiedNameType *T) { return true; } 2533}; 2534 2535/// \brief Represents a 'typename' specifier that names a type within 2536/// a dependent type, e.g., "typename T::type". 2537/// 2538/// TypenameType has a very similar structure to QualifiedNameType, 2539/// which also involves a nested-name-specifier following by a type, 2540/// and (FIXME!) both can even be prefixed by the 'typename' 2541/// keyword. However, the two types serve very different roles: 2542/// QualifiedNameType is a non-semantic type that serves only as sugar 2543/// to show how a particular type was written in the source 2544/// code. TypenameType, on the other hand, only occurs when the 2545/// nested-name-specifier is dependent, such that we cannot resolve 2546/// the actual type until after instantiation. 2547class TypenameType : public Type, public llvm::FoldingSetNode { 2548 /// \brief The nested name specifier containing the qualifier. 2549 NestedNameSpecifier *NNS; 2550 2551 typedef llvm::PointerUnion<const IdentifierInfo *, 2552 const TemplateSpecializationType *> NameType; 2553 2554 /// \brief The type that this typename specifier refers to. 2555 NameType Name; 2556 2557 TypenameType(NestedNameSpecifier *NNS, const IdentifierInfo *Name, 2558 QualType CanonType) 2559 : Type(Typename, CanonType, true), NNS(NNS), Name(Name) { 2560 assert(NNS->isDependent() && 2561 "TypenameType requires a dependent nested-name-specifier"); 2562 } 2563 2564 TypenameType(NestedNameSpecifier *NNS, const TemplateSpecializationType *Ty, 2565 QualType CanonType) 2566 : Type(Typename, CanonType, true), NNS(NNS), Name(Ty) { 2567 assert(NNS->isDependent() && 2568 "TypenameType requires a dependent nested-name-specifier"); 2569 } 2570 2571 friend class ASTContext; // ASTContext creates these 2572 2573public: 2574 /// \brief Retrieve the qualification on this type. 2575 NestedNameSpecifier *getQualifier() const { return NNS; } 2576 2577 /// \brief Retrieve the type named by the typename specifier as an 2578 /// identifier. 2579 /// 2580 /// This routine will return a non-NULL identifier pointer when the 2581 /// form of the original typename was terminated by an identifier, 2582 /// e.g., "typename T::type". 2583 const IdentifierInfo *getIdentifier() const { 2584 return Name.dyn_cast<const IdentifierInfo *>(); 2585 } 2586 2587 /// \brief Retrieve the type named by the typename specifier as a 2588 /// type specialization. 2589 const TemplateSpecializationType *getTemplateId() const { 2590 return Name.dyn_cast<const TemplateSpecializationType *>(); 2591 } 2592 2593 bool isSugared() const { return false; } 2594 QualType desugar() const { return QualType(this, 0); } 2595 2596 void Profile(llvm::FoldingSetNodeID &ID) { 2597 Profile(ID, NNS, Name); 2598 } 2599 2600 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 2601 NameType Name) { 2602 ID.AddPointer(NNS); 2603 ID.AddPointer(Name.getOpaqueValue()); 2604 } 2605 2606 static bool classof(const Type *T) { 2607 return T->getTypeClass() == Typename; 2608 } 2609 static bool classof(const TypenameType *T) { return true; } 2610}; 2611 2612/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 2613/// object oriented design. They basically correspond to C++ classes. There 2614/// are two kinds of interface types, normal interfaces like "NSString" and 2615/// qualified interfaces, which are qualified with a protocol list like 2616/// "NSString<NSCopyable, NSAmazing>". 2617class ObjCInterfaceType : public Type, public llvm::FoldingSetNode { 2618 ObjCInterfaceDecl *Decl; 2619 2620 /// \brief The number of protocols stored after the ObjCInterfaceType node. 2621 /// The list of protocols is sorted on protocol name. No protocol is enterred 2622 /// more than once. 2623 unsigned NumProtocols; 2624 2625 ObjCInterfaceType(QualType Canonical, ObjCInterfaceDecl *D, 2626 ObjCProtocolDecl **Protos, unsigned NumP); 2627 friend class ASTContext; // ASTContext creates these. 2628public: 2629 void Destroy(ASTContext& C); 2630 2631 ObjCInterfaceDecl *getDecl() const { return Decl; } 2632 2633 /// getNumProtocols - Return the number of qualifying protocols in this 2634 /// interface type, or 0 if there are none. 2635 unsigned getNumProtocols() const { return NumProtocols; } 2636 2637 /// \brief Retrieve the Ith protocol. 2638 ObjCProtocolDecl *getProtocol(unsigned I) const { 2639 assert(I < getNumProtocols() && "Out-of-range protocol access"); 2640 return qual_begin()[I]; 2641 } 2642 2643 /// qual_iterator and friends: this provides access to the (potentially empty) 2644 /// list of protocols qualifying this interface. 2645 typedef ObjCProtocolDecl* const * qual_iterator; 2646 qual_iterator qual_begin() const { 2647 return reinterpret_cast<qual_iterator>(this + 1); 2648 } 2649 qual_iterator qual_end() const { 2650 return qual_begin() + NumProtocols; 2651 } 2652 bool qual_empty() const { return NumProtocols == 0; } 2653 2654 bool isSugared() const { return false; } 2655 QualType desugar() const { return QualType(this, 0); } 2656 2657 void Profile(llvm::FoldingSetNodeID &ID); 2658 static void Profile(llvm::FoldingSetNodeID &ID, 2659 const ObjCInterfaceDecl *Decl, 2660 ObjCProtocolDecl * const *protocols, 2661 unsigned NumProtocols); 2662 2663 virtual Linkage getLinkage() const; 2664 2665 static bool classof(const Type *T) { 2666 return T->getTypeClass() == ObjCInterface; 2667 } 2668 static bool classof(const ObjCInterfaceType *) { return true; } 2669}; 2670 2671/// ObjCObjectPointerType - Used to represent 'id', 'Interface *', 'id <p>', 2672/// and 'Interface <p> *'. 2673/// 2674/// Duplicate protocols are removed and protocol list is canonicalized to be in 2675/// alphabetical order. 2676class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 2677 QualType PointeeType; // A builtin or interface type. 2678 2679 /// \brief The number of protocols stored after the ObjCObjectPointerType 2680 /// node. 2681 /// 2682 /// The list of protocols is sorted on protocol name. No protocol is enterred 2683 /// more than once. 2684 unsigned NumProtocols; 2685 2686 ObjCObjectPointerType(QualType Canonical, QualType T, 2687 ObjCProtocolDecl **Protos, unsigned NumP); 2688 friend class ASTContext; // ASTContext creates these. 2689 2690public: 2691 void Destroy(ASTContext& C); 2692 2693 // Get the pointee type. Pointee will either be: 2694 // - a built-in type (for 'id' and 'Class'). 2695 // - an interface type (for user-defined types). 2696 // - a TypedefType whose canonical type is an interface (as in 'T' below). 2697 // For example: typedef NSObject T; T *var; 2698 QualType getPointeeType() const { return PointeeType; } 2699 2700 const ObjCInterfaceType *getInterfaceType() const { 2701 return PointeeType->getAs<ObjCInterfaceType>(); 2702 } 2703 /// getInterfaceDecl - returns an interface decl for user-defined types. 2704 ObjCInterfaceDecl *getInterfaceDecl() const { 2705 return getInterfaceType() ? getInterfaceType()->getDecl() : 0; 2706 } 2707 /// isObjCIdType - true for "id". 2708 bool isObjCIdType() const { 2709 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCId) && 2710 !NumProtocols; 2711 } 2712 /// isObjCClassType - true for "Class". 2713 bool isObjCClassType() const { 2714 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCClass) && 2715 !NumProtocols; 2716 } 2717 2718 /// isObjCQualifiedIdType - true for "id <p>". 2719 bool isObjCQualifiedIdType() const { 2720 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCId) && 2721 NumProtocols; 2722 } 2723 /// isObjCQualifiedClassType - true for "Class <p>". 2724 bool isObjCQualifiedClassType() const { 2725 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCClass) && 2726 NumProtocols; 2727 } 2728 /// qual_iterator and friends: this provides access to the (potentially empty) 2729 /// list of protocols qualifying this interface. 2730 typedef ObjCProtocolDecl* const * qual_iterator; 2731 2732 qual_iterator qual_begin() const { 2733 return reinterpret_cast<qual_iterator> (this + 1); 2734 } 2735 qual_iterator qual_end() const { 2736 return qual_begin() + NumProtocols; 2737 } 2738 bool qual_empty() const { return NumProtocols == 0; } 2739 2740 /// getNumProtocols - Return the number of qualifying protocols in this 2741 /// interface type, or 0 if there are none. 2742 unsigned getNumProtocols() const { return NumProtocols; } 2743 2744 /// \brief Retrieve the Ith protocol. 2745 ObjCProtocolDecl *getProtocol(unsigned I) const { 2746 assert(I < getNumProtocols() && "Out-of-range protocol access"); 2747 return qual_begin()[I]; 2748 } 2749 2750 bool isSugared() const { return false; } 2751 QualType desugar() const { return QualType(this, 0); } 2752 2753 virtual Linkage getLinkage() const; 2754 2755 void Profile(llvm::FoldingSetNodeID &ID); 2756 static void Profile(llvm::FoldingSetNodeID &ID, QualType T, 2757 ObjCProtocolDecl *const *protocols, 2758 unsigned NumProtocols); 2759 static bool classof(const Type *T) { 2760 return T->getTypeClass() == ObjCObjectPointer; 2761 } 2762 static bool classof(const ObjCObjectPointerType *) { return true; } 2763}; 2764 2765/// A qualifier set is used to build a set of qualifiers. 2766class QualifierCollector : public Qualifiers { 2767 ASTContext *Context; 2768 2769public: 2770 QualifierCollector(Qualifiers Qs = Qualifiers()) 2771 : Qualifiers(Qs), Context(0) {} 2772 QualifierCollector(ASTContext &Context, Qualifiers Qs = Qualifiers()) 2773 : Qualifiers(Qs), Context(&Context) {} 2774 2775 void setContext(ASTContext &C) { Context = &C; } 2776 2777 /// Collect any qualifiers on the given type and return an 2778 /// unqualified type. 2779 const Type *strip(QualType QT) { 2780 addFastQualifiers(QT.getLocalFastQualifiers()); 2781 if (QT.hasLocalNonFastQualifiers()) { 2782 const ExtQuals *EQ = QT.getExtQualsUnsafe(); 2783 Context = &EQ->getContext(); 2784 addQualifiers(EQ->getQualifiers()); 2785 return EQ->getBaseType(); 2786 } 2787 return QT.getTypePtrUnsafe(); 2788 } 2789 2790 /// Apply the collected qualifiers to the given type. 2791 QualType apply(QualType QT) const; 2792 2793 /// Apply the collected qualifiers to the given type. 2794 QualType apply(const Type* T) const; 2795 2796}; 2797 2798 2799// Inline function definitions. 2800 2801inline bool QualType::isCanonical() const { 2802 const Type *T = getTypePtr(); 2803 if (hasLocalQualifiers()) 2804 return T->isCanonicalUnqualified() && !isa<ArrayType>(T); 2805 return T->isCanonicalUnqualified(); 2806} 2807 2808inline bool QualType::isCanonicalAsParam() const { 2809 if (hasLocalQualifiers()) return false; 2810 const Type *T = getTypePtr(); 2811 return T->isCanonicalUnqualified() && 2812 !isa<FunctionType>(T) && !isa<ArrayType>(T); 2813} 2814 2815inline bool QualType::isConstQualified() const { 2816 return isLocalConstQualified() || 2817 getTypePtr()->getCanonicalTypeInternal().isLocalConstQualified(); 2818} 2819 2820inline bool QualType::isRestrictQualified() const { 2821 return isLocalRestrictQualified() || 2822 getTypePtr()->getCanonicalTypeInternal().isLocalRestrictQualified(); 2823} 2824 2825 2826inline bool QualType::isVolatileQualified() const { 2827 return isLocalVolatileQualified() || 2828 getTypePtr()->getCanonicalTypeInternal().isLocalVolatileQualified(); 2829} 2830 2831inline bool QualType::hasQualifiers() const { 2832 return hasLocalQualifiers() || 2833 getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers(); 2834} 2835 2836inline Qualifiers QualType::getQualifiers() const { 2837 Qualifiers Quals = getLocalQualifiers(); 2838 Quals.addQualifiers( 2839 getTypePtr()->getCanonicalTypeInternal().getLocalQualifiers()); 2840 return Quals; 2841} 2842 2843inline unsigned QualType::getCVRQualifiers() const { 2844 return getLocalCVRQualifiers() | 2845 getTypePtr()->getCanonicalTypeInternal().getLocalCVRQualifiers(); 2846} 2847 2848/// getCVRQualifiersThroughArrayTypes - If there are CVR qualifiers for this 2849/// type, returns them. Otherwise, if this is an array type, recurses 2850/// on the element type until some qualifiers have been found or a non-array 2851/// type reached. 2852inline unsigned QualType::getCVRQualifiersThroughArrayTypes() const { 2853 if (unsigned Quals = getCVRQualifiers()) 2854 return Quals; 2855 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2856 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 2857 return AT->getElementType().getCVRQualifiersThroughArrayTypes(); 2858 return 0; 2859} 2860 2861inline void QualType::removeConst() { 2862 removeFastQualifiers(Qualifiers::Const); 2863} 2864 2865inline void QualType::removeRestrict() { 2866 removeFastQualifiers(Qualifiers::Restrict); 2867} 2868 2869inline void QualType::removeVolatile() { 2870 QualifierCollector Qc; 2871 const Type *Ty = Qc.strip(*this); 2872 if (Qc.hasVolatile()) { 2873 Qc.removeVolatile(); 2874 *this = Qc.apply(Ty); 2875 } 2876} 2877 2878inline void QualType::removeCVRQualifiers(unsigned Mask) { 2879 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 2880 2881 // Fast path: we don't need to touch the slow qualifiers. 2882 if (!(Mask & ~Qualifiers::FastMask)) { 2883 removeFastQualifiers(Mask); 2884 return; 2885 } 2886 2887 QualifierCollector Qc; 2888 const Type *Ty = Qc.strip(*this); 2889 Qc.removeCVRQualifiers(Mask); 2890 *this = Qc.apply(Ty); 2891} 2892 2893/// getAddressSpace - Return the address space of this type. 2894inline unsigned QualType::getAddressSpace() const { 2895 if (hasLocalNonFastQualifiers()) { 2896 const ExtQuals *EQ = getExtQualsUnsafe(); 2897 if (EQ->hasAddressSpace()) 2898 return EQ->getAddressSpace(); 2899 } 2900 2901 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2902 if (CT.hasLocalNonFastQualifiers()) { 2903 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 2904 if (EQ->hasAddressSpace()) 2905 return EQ->getAddressSpace(); 2906 } 2907 2908 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 2909 return AT->getElementType().getAddressSpace(); 2910 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 2911 return RT->getAddressSpace(); 2912 return 0; 2913} 2914 2915/// getObjCGCAttr - Return the gc attribute of this type. 2916inline Qualifiers::GC QualType::getObjCGCAttr() const { 2917 if (hasLocalNonFastQualifiers()) { 2918 const ExtQuals *EQ = getExtQualsUnsafe(); 2919 if (EQ->hasObjCGCAttr()) 2920 return EQ->getObjCGCAttr(); 2921 } 2922 2923 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2924 if (CT.hasLocalNonFastQualifiers()) { 2925 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 2926 if (EQ->hasObjCGCAttr()) 2927 return EQ->getObjCGCAttr(); 2928 } 2929 2930 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 2931 return AT->getElementType().getObjCGCAttr(); 2932 if (const ObjCObjectPointerType *PT = CT->getAs<ObjCObjectPointerType>()) 2933 return PT->getPointeeType().getObjCGCAttr(); 2934 // We most look at all pointer types, not just pointer to interface types. 2935 if (const PointerType *PT = CT->getAs<PointerType>()) 2936 return PT->getPointeeType().getObjCGCAttr(); 2937 return Qualifiers::GCNone; 2938} 2939 2940 /// getNoReturnAttr - Returns true if the type has the noreturn attribute, 2941 /// false otherwise. 2942inline bool Type::getNoReturnAttr() const { 2943 if (const PointerType *PT = getAs<PointerType>()) { 2944 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 2945 return FT->getNoReturnAttr(); 2946 } else if (const FunctionType *FT = getAs<FunctionType>()) 2947 return FT->getNoReturnAttr(); 2948 2949 return false; 2950} 2951 2952/// getCallConv - Returns the calling convention of the type if the type 2953/// is a function type, CC_Default otherwise. 2954inline CallingConv Type::getCallConv() const { 2955 if (const PointerType *PT = getAs<PointerType>()) 2956 return PT->getPointeeType()->getCallConv(); 2957 else if (const ReferenceType *RT = getAs<ReferenceType>()) 2958 return RT->getPointeeType()->getCallConv(); 2959 else if (const MemberPointerType *MPT = 2960 getAs<MemberPointerType>()) 2961 return MPT->getPointeeType()->getCallConv(); 2962 else if (const BlockPointerType *BPT = 2963 getAs<BlockPointerType>()) { 2964 if (const FunctionType *FT = BPT->getPointeeType()->getAs<FunctionType>()) 2965 return FT->getCallConv(); 2966 } else if (const FunctionType *FT = getAs<FunctionType>()) 2967 return FT->getCallConv(); 2968 2969 return CC_Default; 2970} 2971 2972/// isMoreQualifiedThan - Determine whether this type is more 2973/// qualified than the Other type. For example, "const volatile int" 2974/// is more qualified than "const int", "volatile int", and 2975/// "int". However, it is not more qualified than "const volatile 2976/// int". 2977inline bool QualType::isMoreQualifiedThan(QualType Other) const { 2978 // FIXME: work on arbitrary qualifiers 2979 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 2980 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 2981 if (getAddressSpace() != Other.getAddressSpace()) 2982 return false; 2983 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 2984} 2985 2986/// isAtLeastAsQualifiedAs - Determine whether this type is at last 2987/// as qualified as the Other type. For example, "const volatile 2988/// int" is at least as qualified as "const int", "volatile int", 2989/// "int", and "const volatile int". 2990inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 2991 // FIXME: work on arbitrary qualifiers 2992 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 2993 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 2994 if (getAddressSpace() != Other.getAddressSpace()) 2995 return false; 2996 return (MyQuals | OtherQuals) == MyQuals; 2997} 2998 2999/// getNonReferenceType - If Type is a reference type (e.g., const 3000/// int&), returns the type that the reference refers to ("const 3001/// int"). Otherwise, returns the type itself. This routine is used 3002/// throughout Sema to implement C++ 5p6: 3003/// 3004/// If an expression initially has the type "reference to T" (8.3.2, 3005/// 8.5.3), the type is adjusted to "T" prior to any further 3006/// analysis, the expression designates the object or function 3007/// denoted by the reference, and the expression is an lvalue. 3008inline QualType QualType::getNonReferenceType() const { 3009 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 3010 return RefType->getPointeeType(); 3011 else 3012 return *this; 3013} 3014 3015inline const ObjCInterfaceType *Type::getAsPointerToObjCInterfaceType() const { 3016 if (const PointerType *PT = getAs<PointerType>()) 3017 return PT->getPointeeType()->getAs<ObjCInterfaceType>(); 3018 return 0; 3019} 3020 3021inline bool Type::isFunctionType() const { 3022 return isa<FunctionType>(CanonicalType); 3023} 3024inline bool Type::isPointerType() const { 3025 return isa<PointerType>(CanonicalType); 3026} 3027inline bool Type::isAnyPointerType() const { 3028 return isPointerType() || isObjCObjectPointerType(); 3029} 3030inline bool Type::isBlockPointerType() const { 3031 return isa<BlockPointerType>(CanonicalType); 3032} 3033inline bool Type::isReferenceType() const { 3034 return isa<ReferenceType>(CanonicalType); 3035} 3036inline bool Type::isLValueReferenceType() const { 3037 return isa<LValueReferenceType>(CanonicalType); 3038} 3039inline bool Type::isRValueReferenceType() const { 3040 return isa<RValueReferenceType>(CanonicalType); 3041} 3042inline bool Type::isFunctionPointerType() const { 3043 if (const PointerType* T = getAs<PointerType>()) 3044 return T->getPointeeType()->isFunctionType(); 3045 else 3046 return false; 3047} 3048inline bool Type::isMemberPointerType() const { 3049 return isa<MemberPointerType>(CanonicalType); 3050} 3051inline bool Type::isMemberFunctionPointerType() const { 3052 if (const MemberPointerType* T = getAs<MemberPointerType>()) 3053 return T->getPointeeType()->isFunctionType(); 3054 else 3055 return false; 3056} 3057inline bool Type::isArrayType() const { 3058 return isa<ArrayType>(CanonicalType); 3059} 3060inline bool Type::isConstantArrayType() const { 3061 return isa<ConstantArrayType>(CanonicalType); 3062} 3063inline bool Type::isIncompleteArrayType() const { 3064 return isa<IncompleteArrayType>(CanonicalType); 3065} 3066inline bool Type::isVariableArrayType() const { 3067 return isa<VariableArrayType>(CanonicalType); 3068} 3069inline bool Type::isDependentSizedArrayType() const { 3070 return isa<DependentSizedArrayType>(CanonicalType); 3071} 3072inline bool Type::isRecordType() const { 3073 return isa<RecordType>(CanonicalType); 3074} 3075inline bool Type::isAnyComplexType() const { 3076 return isa<ComplexType>(CanonicalType); 3077} 3078inline bool Type::isVectorType() const { 3079 return isa<VectorType>(CanonicalType); 3080} 3081inline bool Type::isExtVectorType() const { 3082 return isa<ExtVectorType>(CanonicalType); 3083} 3084inline bool Type::isObjCObjectPointerType() const { 3085 return isa<ObjCObjectPointerType>(CanonicalType); 3086} 3087inline bool Type::isObjCInterfaceType() const { 3088 return isa<ObjCInterfaceType>(CanonicalType); 3089} 3090inline bool Type::isObjCQualifiedIdType() const { 3091 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3092 return OPT->isObjCQualifiedIdType(); 3093 return false; 3094} 3095inline bool Type::isObjCQualifiedClassType() const { 3096 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3097 return OPT->isObjCQualifiedClassType(); 3098 return false; 3099} 3100inline bool Type::isObjCIdType() const { 3101 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3102 return OPT->isObjCIdType(); 3103 return false; 3104} 3105inline bool Type::isObjCClassType() const { 3106 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3107 return OPT->isObjCClassType(); 3108 return false; 3109} 3110inline bool Type::isObjCSelType() const { 3111 if (const PointerType *OPT = getAs<PointerType>()) 3112 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 3113 return false; 3114} 3115inline bool Type::isObjCBuiltinType() const { 3116 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 3117} 3118inline bool Type::isTemplateTypeParmType() const { 3119 return isa<TemplateTypeParmType>(CanonicalType); 3120} 3121 3122inline bool Type::isSpecificBuiltinType(unsigned K) const { 3123 if (const BuiltinType *BT = getAs<BuiltinType>()) 3124 if (BT->getKind() == (BuiltinType::Kind) K) 3125 return true; 3126 return false; 3127} 3128 3129/// \brief Determines whether this is a type for which one can define 3130/// an overloaded operator. 3131inline bool Type::isOverloadableType() const { 3132 return isDependentType() || isRecordType() || isEnumeralType(); 3133} 3134 3135inline bool Type::hasPointerRepresentation() const { 3136 return (isPointerType() || isReferenceType() || isBlockPointerType() || 3137 isObjCInterfaceType() || isObjCObjectPointerType() || 3138 isObjCQualifiedInterfaceType() || isNullPtrType()); 3139} 3140 3141inline bool Type::hasObjCPointerRepresentation() const { 3142 return (isObjCInterfaceType() || isObjCObjectPointerType() || 3143 isObjCQualifiedInterfaceType()); 3144} 3145 3146/// Insertion operator for diagnostics. This allows sending QualType's into a 3147/// diagnostic with <<. 3148inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 3149 QualType T) { 3150 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 3151 Diagnostic::ak_qualtype); 3152 return DB; 3153} 3154 3155// Helper class template that is used by Type::getAs to ensure that one does 3156// not try to look through a qualified type to get to an array type. 3157template<typename T, 3158 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 3159 llvm::is_base_of<ArrayType, T>::value)> 3160struct ArrayType_cannot_be_used_with_getAs { }; 3161 3162template<typename T> 3163struct ArrayType_cannot_be_used_with_getAs<T, true>; 3164 3165/// Member-template getAs<specific type>'. 3166template <typename T> const T *Type::getAs() const { 3167 ArrayType_cannot_be_used_with_getAs<T> at; 3168 (void)at; 3169 3170 // If this is directly a T type, return it. 3171 if (const T *Ty = dyn_cast<T>(this)) 3172 return Ty; 3173 3174 // If the canonical form of this type isn't the right kind, reject it. 3175 if (!isa<T>(CanonicalType)) 3176 return 0; 3177 3178 // If this is a typedef for the type, strip the typedef off without 3179 // losing all typedef information. 3180 return cast<T>(getUnqualifiedDesugaredType()); 3181} 3182 3183#ifndef NDEBUG 3184 /// \brief The number of times we have dynamically checked for an 3185 /// Objective-C-specific type node. 3186 extern llvm::Statistic objc_type_checks; 3187 3188 /// \brief The number of times we have dynamically checked for a 3189 /// C++-specific type node. 3190 extern llvm::Statistic cxx_type_checks; 3191#endif 3192} // end namespace clang 3193 3194// Enumerate Objective-C types 3195CLANG_ISA_STATISTIC(ObjCInterfaceType, objc_type_checks) 3196CLANG_ISA_STATISTIC(ObjCObjectPointerType, objc_type_checks) 3197 3198// Enumerate C++ types 3199CLANG_ISA_STATISTIC(ReferenceType, cxx_type_checks) 3200CLANG_ISA_STATISTIC(LValueReferenceType, cxx_type_checks) 3201CLANG_ISA_STATISTIC(RValueReferenceType, cxx_type_checks) 3202CLANG_ISA_STATISTIC(MemberPointerType, cxx_type_checks) 3203CLANG_ISA_STATISTIC(DependentSizedArrayType, cxx_type_checks) 3204CLANG_ISA_STATISTIC(DependentSizedExtVectorType, cxx_type_checks) 3205CLANG_ISA_STATISTIC(UnresolvedUsingType, cxx_type_checks) 3206CLANG_ISA_STATISTIC(DecltypeType, cxx_type_checks) 3207CLANG_ISA_STATISTIC(TemplateTypeParmType, cxx_type_checks) 3208CLANG_ISA_STATISTIC(SubstTemplateTypeParmType, cxx_type_checks) 3209CLANG_ISA_STATISTIC(TemplateSpecializationType, cxx_type_checks) 3210CLANG_ISA_STATISTIC(QualifiedNameType, cxx_type_checks) 3211CLANG_ISA_STATISTIC(InjectedClassNameType, cxx_type_checks) 3212CLANG_ISA_STATISTIC(TypenameType, cxx_type_checks) 3213 3214#endif 3215