Type.h revision b001de7458d17c17e6d8b8034c7cfcefd3b70c00
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/ExceptionSpecificationType.h" 19#include "clang/Basic/IdentifierTable.h" 20#include "clang/Basic/Linkage.h" 21#include "clang/Basic/PartialDiagnostic.h" 22#include "clang/Basic/Visibility.h" 23#include "clang/AST/NestedNameSpecifier.h" 24#include "clang/AST/TemplateName.h" 25#include "llvm/Support/type_traits.h" 26#include "llvm/Support/ErrorHandling.h" 27#include "llvm/ADT/APSInt.h" 28#include "llvm/ADT/FoldingSet.h" 29#include "llvm/ADT/Optional.h" 30#include "llvm/ADT/PointerIntPair.h" 31#include "llvm/ADT/PointerUnion.h" 32#include "clang/Basic/LLVM.h" 33 34namespace clang { 35 enum { 36 TypeAlignmentInBits = 4, 37 TypeAlignment = 1 << TypeAlignmentInBits 38 }; 39 class Type; 40 class ExtQuals; 41 class QualType; 42} 43 44namespace llvm { 45 template <typename T> 46 class PointerLikeTypeTraits; 47 template<> 48 class PointerLikeTypeTraits< ::clang::Type*> { 49 public: 50 static inline void *getAsVoidPointer(::clang::Type *P) { return P; } 51 static inline ::clang::Type *getFromVoidPointer(void *P) { 52 return static_cast< ::clang::Type*>(P); 53 } 54 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 55 }; 56 template<> 57 class PointerLikeTypeTraits< ::clang::ExtQuals*> { 58 public: 59 static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; } 60 static inline ::clang::ExtQuals *getFromVoidPointer(void *P) { 61 return static_cast< ::clang::ExtQuals*>(P); 62 } 63 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 64 }; 65 66 template <> 67 struct isPodLike<clang::QualType> { static const bool value = true; }; 68} 69 70namespace clang { 71 class ASTContext; 72 class TypedefNameDecl; 73 class TemplateDecl; 74 class TemplateTypeParmDecl; 75 class NonTypeTemplateParmDecl; 76 class TemplateTemplateParmDecl; 77 class TagDecl; 78 class RecordDecl; 79 class CXXRecordDecl; 80 class EnumDecl; 81 class FieldDecl; 82 class ObjCInterfaceDecl; 83 class ObjCProtocolDecl; 84 class ObjCMethodDecl; 85 class UnresolvedUsingTypenameDecl; 86 class Expr; 87 class Stmt; 88 class SourceLocation; 89 class StmtIteratorBase; 90 class TemplateArgument; 91 class TemplateArgumentLoc; 92 class TemplateArgumentListInfo; 93 class ElaboratedType; 94 class ExtQuals; 95 class ExtQualsTypeCommonBase; 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 ObjCLifetime { 126 /// There is no lifetime qualification on this type. 127 OCL_None, 128 129 /// This object can be modified without requiring retains or 130 /// releases. 131 OCL_ExplicitNone, 132 133 /// Assigning into this object requires the old value to be 134 /// released and the new value to be retained. The timing of the 135 /// release of the old value is inexact: it may be moved to 136 /// immediately after the last known point where the value is 137 /// live. 138 OCL_Strong, 139 140 /// Reading or writing from this object requires a barrier call. 141 OCL_Weak, 142 143 /// Assigning into this object requires a lifetime extension. 144 OCL_Autoreleasing 145 }; 146 147 enum { 148 /// The maximum supported address space number. 149 /// 24 bits should be enough for anyone. 150 MaxAddressSpace = 0xffffffu, 151 152 /// The width of the "fast" qualifier mask. 153 FastWidth = 3, 154 155 /// The fast qualifier mask. 156 FastMask = (1 << FastWidth) - 1 157 }; 158 159 Qualifiers() : Mask(0) {} 160 161 static Qualifiers fromFastMask(unsigned Mask) { 162 Qualifiers Qs; 163 Qs.addFastQualifiers(Mask); 164 return Qs; 165 } 166 167 static Qualifiers fromCVRMask(unsigned CVR) { 168 Qualifiers Qs; 169 Qs.addCVRQualifiers(CVR); 170 return Qs; 171 } 172 173 // Deserialize qualifiers from an opaque representation. 174 static Qualifiers fromOpaqueValue(unsigned opaque) { 175 Qualifiers Qs; 176 Qs.Mask = opaque; 177 return Qs; 178 } 179 180 // Serialize these qualifiers into an opaque representation. 181 unsigned getAsOpaqueValue() const { 182 return Mask; 183 } 184 185 bool hasConst() const { return Mask & Const; } 186 void setConst(bool flag) { 187 Mask = (Mask & ~Const) | (flag ? Const : 0); 188 } 189 void removeConst() { Mask &= ~Const; } 190 void addConst() { Mask |= Const; } 191 192 bool hasVolatile() const { return Mask & Volatile; } 193 void setVolatile(bool flag) { 194 Mask = (Mask & ~Volatile) | (flag ? Volatile : 0); 195 } 196 void removeVolatile() { Mask &= ~Volatile; } 197 void addVolatile() { Mask |= Volatile; } 198 199 bool hasRestrict() const { return Mask & Restrict; } 200 void setRestrict(bool flag) { 201 Mask = (Mask & ~Restrict) | (flag ? Restrict : 0); 202 } 203 void removeRestrict() { Mask &= ~Restrict; } 204 void addRestrict() { Mask |= Restrict; } 205 206 bool hasCVRQualifiers() const { return getCVRQualifiers(); } 207 unsigned getCVRQualifiers() const { return Mask & CVRMask; } 208 void setCVRQualifiers(unsigned mask) { 209 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 210 Mask = (Mask & ~CVRMask) | mask; 211 } 212 void removeCVRQualifiers(unsigned mask) { 213 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 214 Mask &= ~mask; 215 } 216 void removeCVRQualifiers() { 217 removeCVRQualifiers(CVRMask); 218 } 219 void addCVRQualifiers(unsigned mask) { 220 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 221 Mask |= mask; 222 } 223 224 bool hasObjCGCAttr() const { return Mask & GCAttrMask; } 225 GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); } 226 void setObjCGCAttr(GC type) { 227 Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift); 228 } 229 void removeObjCGCAttr() { setObjCGCAttr(GCNone); } 230 void addObjCGCAttr(GC type) { 231 assert(type); 232 setObjCGCAttr(type); 233 } 234 Qualifiers withoutObjCGCAttr() const { 235 Qualifiers qs = *this; 236 qs.removeObjCGCAttr(); 237 return qs; 238 } 239 Qualifiers withoutObjCGLifetime() const { 240 Qualifiers qs = *this; 241 qs.removeObjCLifetime(); 242 return qs; 243 } 244 245 bool hasObjCLifetime() const { return Mask & LifetimeMask; } 246 ObjCLifetime getObjCLifetime() const { 247 return ObjCLifetime((Mask & LifetimeMask) >> LifetimeShift); 248 } 249 void setObjCLifetime(ObjCLifetime type) { 250 Mask = (Mask & ~LifetimeMask) | (type << LifetimeShift); 251 } 252 void removeObjCLifetime() { setObjCLifetime(OCL_None); } 253 void addObjCLifetime(ObjCLifetime type) { 254 assert(type); 255 setObjCLifetime(type); 256 } 257 258 /// True if the lifetime is neither None or ExplicitNone. 259 bool hasNonTrivialObjCLifetime() const { 260 ObjCLifetime lifetime = getObjCLifetime(); 261 return (lifetime > OCL_ExplicitNone); 262 } 263 264 /// True if the lifetime is either strong or weak. 265 bool hasStrongOrWeakObjCLifetime() const { 266 ObjCLifetime lifetime = getObjCLifetime(); 267 return (lifetime == OCL_Strong || lifetime == OCL_Weak); 268 } 269 270 bool hasAddressSpace() const { return Mask & AddressSpaceMask; } 271 unsigned getAddressSpace() const { return Mask >> AddressSpaceShift; } 272 void setAddressSpace(unsigned space) { 273 assert(space <= MaxAddressSpace); 274 Mask = (Mask & ~AddressSpaceMask) 275 | (((uint32_t) space) << AddressSpaceShift); 276 } 277 void removeAddressSpace() { setAddressSpace(0); } 278 void addAddressSpace(unsigned space) { 279 assert(space); 280 setAddressSpace(space); 281 } 282 283 // Fast qualifiers are those that can be allocated directly 284 // on a QualType object. 285 bool hasFastQualifiers() const { return getFastQualifiers(); } 286 unsigned getFastQualifiers() const { return Mask & FastMask; } 287 void setFastQualifiers(unsigned mask) { 288 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 289 Mask = (Mask & ~FastMask) | mask; 290 } 291 void removeFastQualifiers(unsigned mask) { 292 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 293 Mask &= ~mask; 294 } 295 void removeFastQualifiers() { 296 removeFastQualifiers(FastMask); 297 } 298 void addFastQualifiers(unsigned mask) { 299 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 300 Mask |= mask; 301 } 302 303 /// hasNonFastQualifiers - Return true if the set contains any 304 /// qualifiers which require an ExtQuals node to be allocated. 305 bool hasNonFastQualifiers() const { return Mask & ~FastMask; } 306 Qualifiers getNonFastQualifiers() const { 307 Qualifiers Quals = *this; 308 Quals.setFastQualifiers(0); 309 return Quals; 310 } 311 312 /// hasQualifiers - Return true if the set contains any qualifiers. 313 bool hasQualifiers() const { return Mask; } 314 bool empty() const { return !Mask; } 315 316 /// \brief Add the qualifiers from the given set to this set. 317 void addQualifiers(Qualifiers Q) { 318 // If the other set doesn't have any non-boolean qualifiers, just 319 // bit-or it in. 320 if (!(Q.Mask & ~CVRMask)) 321 Mask |= Q.Mask; 322 else { 323 Mask |= (Q.Mask & CVRMask); 324 if (Q.hasAddressSpace()) 325 addAddressSpace(Q.getAddressSpace()); 326 if (Q.hasObjCGCAttr()) 327 addObjCGCAttr(Q.getObjCGCAttr()); 328 if (Q.hasObjCLifetime()) 329 addObjCLifetime(Q.getObjCLifetime()); 330 } 331 } 332 333 /// \brief Add the qualifiers from the given set to this set, given that 334 /// they don't conflict. 335 void addConsistentQualifiers(Qualifiers qs) { 336 assert(getAddressSpace() == qs.getAddressSpace() || 337 !hasAddressSpace() || !qs.hasAddressSpace()); 338 assert(getObjCGCAttr() == qs.getObjCGCAttr() || 339 !hasObjCGCAttr() || !qs.hasObjCGCAttr()); 340 assert(getObjCLifetime() == qs.getObjCLifetime() || 341 !hasObjCLifetime() || !qs.hasObjCLifetime()); 342 Mask |= qs.Mask; 343 } 344 345 /// \brief Determines if these qualifiers compatibly include another set. 346 /// Generally this answers the question of whether an object with the other 347 /// qualifiers can be safely used as an object with these qualifiers. 348 bool compatiblyIncludes(Qualifiers other) const { 349 return 350 // Address spaces must match exactly. 351 getAddressSpace() == other.getAddressSpace() && 352 // ObjC GC qualifiers can match, be added, or be removed, but can't be 353 // changed. 354 (getObjCGCAttr() == other.getObjCGCAttr() || 355 !hasObjCGCAttr() || !other.hasObjCGCAttr()) && 356 // ObjC lifetime qualifiers must match exactly. 357 getObjCLifetime() == other.getObjCLifetime() && 358 // CVR qualifiers may subset. 359 (((Mask & CVRMask) | (other.Mask & CVRMask)) == (Mask & CVRMask)); 360 } 361 362 /// \brief Determines if these qualifiers compatibly include another set of 363 /// qualifiers from the narrow perspective of Objective-C ARC lifetime. 364 /// 365 /// One set of Objective-C lifetime qualifiers compatibly includes the other 366 /// if the lifetime qualifiers match, or if both are non-__weak and the 367 /// including set also contains the 'const' qualifier. 368 bool compatiblyIncludesObjCLifetime(Qualifiers other) const { 369 if (getObjCLifetime() == other.getObjCLifetime()) 370 return true; 371 372 if (getObjCLifetime() == OCL_Weak || other.getObjCLifetime() == OCL_Weak) 373 return false; 374 375 return hasConst(); 376 } 377 378 bool isSupersetOf(Qualifiers Other) const; 379 380 /// \brief Determine whether this set of qualifiers is a strict superset of 381 /// another set of qualifiers, not considering qualifier compatibility. 382 bool isStrictSupersetOf(Qualifiers Other) const; 383 384 bool operator==(Qualifiers Other) const { return Mask == Other.Mask; } 385 bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; } 386 387 operator bool() const { return hasQualifiers(); } 388 389 Qualifiers &operator+=(Qualifiers R) { 390 addQualifiers(R); 391 return *this; 392 } 393 394 // Union two qualifier sets. If an enumerated qualifier appears 395 // in both sets, use the one from the right. 396 friend Qualifiers operator+(Qualifiers L, Qualifiers R) { 397 L += R; 398 return L; 399 } 400 401 Qualifiers &operator-=(Qualifiers R) { 402 Mask = Mask & ~(R.Mask); 403 return *this; 404 } 405 406 /// \brief Compute the difference between two qualifier sets. 407 friend Qualifiers operator-(Qualifiers L, Qualifiers R) { 408 L -= R; 409 return L; 410 } 411 412 std::string getAsString() const; 413 std::string getAsString(const PrintingPolicy &Policy) const { 414 std::string Buffer; 415 getAsStringInternal(Buffer, Policy); 416 return Buffer; 417 } 418 void getAsStringInternal(std::string &S, const PrintingPolicy &Policy) const; 419 420 void Profile(llvm::FoldingSetNodeID &ID) const { 421 ID.AddInteger(Mask); 422 } 423 424private: 425 426 // bits: |0 1 2|3 .. 4|5 .. 7|8 ... 31| 427 // |C R V|GCAttr|Lifetime|AddressSpace| 428 uint32_t Mask; 429 430 static const uint32_t GCAttrMask = 0x18; 431 static const uint32_t GCAttrShift = 3; 432 static const uint32_t LifetimeMask = 0xE0; 433 static const uint32_t LifetimeShift = 5; 434 static const uint32_t AddressSpaceMask = ~(CVRMask|GCAttrMask|LifetimeMask); 435 static const uint32_t AddressSpaceShift = 8; 436}; 437 438/// CallingConv - Specifies the calling convention that a function uses. 439enum CallingConv { 440 CC_Default, 441 CC_C, // __attribute__((cdecl)) 442 CC_X86StdCall, // __attribute__((stdcall)) 443 CC_X86FastCall, // __attribute__((fastcall)) 444 CC_X86ThisCall, // __attribute__((thiscall)) 445 CC_X86Pascal, // __attribute__((pascal)) 446 CC_AAPCS, // __attribute__((pcs("aapcs"))) 447 CC_AAPCS_VFP // __attribute__((pcs("aapcs-vfp"))) 448}; 449 450typedef std::pair<const Type*, Qualifiers> SplitQualType; 451 452/// QualType - For efficiency, we don't store CV-qualified types as nodes on 453/// their own: instead each reference to a type stores the qualifiers. This 454/// greatly reduces the number of nodes we need to allocate for types (for 455/// example we only need one for 'int', 'const int', 'volatile int', 456/// 'const volatile int', etc). 457/// 458/// As an added efficiency bonus, instead of making this a pair, we 459/// just store the two bits we care about in the low bits of the 460/// pointer. To handle the packing/unpacking, we make QualType be a 461/// simple wrapper class that acts like a smart pointer. A third bit 462/// indicates whether there are extended qualifiers present, in which 463/// case the pointer points to a special structure. 464class QualType { 465 // Thankfully, these are efficiently composable. 466 llvm::PointerIntPair<llvm::PointerUnion<const Type*,const ExtQuals*>, 467 Qualifiers::FastWidth> Value; 468 469 const ExtQuals *getExtQualsUnsafe() const { 470 return Value.getPointer().get<const ExtQuals*>(); 471 } 472 473 const Type *getTypePtrUnsafe() const { 474 return Value.getPointer().get<const Type*>(); 475 } 476 477 const ExtQualsTypeCommonBase *getCommonPtr() const { 478 assert(!isNull() && "Cannot retrieve a NULL type pointer"); 479 uintptr_t CommonPtrVal 480 = reinterpret_cast<uintptr_t>(Value.getOpaqueValue()); 481 CommonPtrVal &= ~(uintptr_t)((1 << TypeAlignmentInBits) - 1); 482 return reinterpret_cast<ExtQualsTypeCommonBase*>(CommonPtrVal); 483 } 484 485 friend class QualifierCollector; 486public: 487 QualType() {} 488 489 QualType(const Type *Ptr, unsigned Quals) 490 : Value(Ptr, Quals) {} 491 QualType(const ExtQuals *Ptr, unsigned Quals) 492 : Value(Ptr, Quals) {} 493 494 unsigned getLocalFastQualifiers() const { return Value.getInt(); } 495 void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); } 496 497 /// Retrieves a pointer to the underlying (unqualified) type. 498 /// This should really return a const Type, but it's not worth 499 /// changing all the users right now. 500 /// 501 /// This function requires that the type not be NULL. If the type might be 502 /// NULL, use the (slightly less efficient) \c getTypePtrOrNull(). 503 const Type *getTypePtr() const; 504 505 const Type *getTypePtrOrNull() const; 506 507 /// Retrieves a pointer to the name of the base type. 508 const IdentifierInfo *getBaseTypeIdentifier() const; 509 510 /// Divides a QualType into its unqualified type and a set of local 511 /// qualifiers. 512 SplitQualType split() const; 513 514 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 515 static QualType getFromOpaquePtr(const void *Ptr) { 516 QualType T; 517 T.Value.setFromOpaqueValue(const_cast<void*>(Ptr)); 518 return T; 519 } 520 521 const Type &operator*() const { 522 return *getTypePtr(); 523 } 524 525 const Type *operator->() const { 526 return getTypePtr(); 527 } 528 529 bool isCanonical() const; 530 bool isCanonicalAsParam() const; 531 532 /// isNull - Return true if this QualType doesn't point to a type yet. 533 bool isNull() const { 534 return Value.getPointer().isNull(); 535 } 536 537 /// \brief Determine whether this particular QualType instance has the 538 /// "const" qualifier set, without looking through typedefs that may have 539 /// added "const" at a different level. 540 bool isLocalConstQualified() const { 541 return (getLocalFastQualifiers() & Qualifiers::Const); 542 } 543 544 /// \brief Determine whether this type is const-qualified. 545 bool isConstQualified() const; 546 547 /// \brief Determine whether this particular QualType instance has the 548 /// "restrict" qualifier set, without looking through typedefs that may have 549 /// added "restrict" at a different level. 550 bool isLocalRestrictQualified() const { 551 return (getLocalFastQualifiers() & Qualifiers::Restrict); 552 } 553 554 /// \brief Determine whether this type is restrict-qualified. 555 bool isRestrictQualified() const; 556 557 /// \brief Determine whether this particular QualType instance has the 558 /// "volatile" qualifier set, without looking through typedefs that may have 559 /// added "volatile" at a different level. 560 bool isLocalVolatileQualified() const { 561 return (getLocalFastQualifiers() & Qualifiers::Volatile); 562 } 563 564 /// \brief Determine whether this type is volatile-qualified. 565 bool isVolatileQualified() const; 566 567 /// \brief Determine whether this particular QualType instance has any 568 /// qualifiers, without looking through any typedefs that might add 569 /// qualifiers at a different level. 570 bool hasLocalQualifiers() const { 571 return getLocalFastQualifiers() || hasLocalNonFastQualifiers(); 572 } 573 574 /// \brief Determine whether this type has any qualifiers. 575 bool hasQualifiers() const; 576 577 /// \brief Determine whether this particular QualType instance has any 578 /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType 579 /// instance. 580 bool hasLocalNonFastQualifiers() const { 581 return Value.getPointer().is<const ExtQuals*>(); 582 } 583 584 /// \brief Retrieve the set of qualifiers local to this particular QualType 585 /// instance, not including any qualifiers acquired through typedefs or 586 /// other sugar. 587 Qualifiers getLocalQualifiers() const; 588 589 /// \brief Retrieve the set of qualifiers applied to this type. 590 Qualifiers getQualifiers() const; 591 592 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 593 /// local to this particular QualType instance, not including any qualifiers 594 /// acquired through typedefs or other sugar. 595 unsigned getLocalCVRQualifiers() const { 596 return getLocalFastQualifiers(); 597 } 598 599 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 600 /// applied to this type. 601 unsigned getCVRQualifiers() const; 602 603 bool isConstant(ASTContext& Ctx) const { 604 return QualType::isConstant(*this, Ctx); 605 } 606 607 /// \brief Determine whether this is a Plain Old Data (POD) type (C++ 3.9p10). 608 bool isPODType(ASTContext &Context) const; 609 610 /// isCXX11PODType() - Return true if this is a POD type according to the 611 /// more relaxed rules of the C++11 standard, regardless of the current 612 /// compilation's language. 613 /// (C++0x [basic.types]p9) 614 bool isCXX11PODType(ASTContext &Context) const; 615 616 /// isTrivialType - Return true if this is a trivial type 617 /// (C++0x [basic.types]p9) 618 bool isTrivialType(ASTContext &Context) const; 619 620 /// isTriviallyCopyableType - Return true if this is a trivially 621 /// copyable type (C++0x [basic.types]p9) 622 bool isTriviallyCopyableType(ASTContext &Context) const; 623 624 // Don't promise in the API that anything besides 'const' can be 625 // easily added. 626 627 /// addConst - add the specified type qualifier to this QualType. 628 void addConst() { 629 addFastQualifiers(Qualifiers::Const); 630 } 631 QualType withConst() const { 632 return withFastQualifiers(Qualifiers::Const); 633 } 634 635 /// addVolatile - add the specified type qualifier to this QualType. 636 void addVolatile() { 637 addFastQualifiers(Qualifiers::Volatile); 638 } 639 QualType withVolatile() const { 640 return withFastQualifiers(Qualifiers::Volatile); 641 } 642 643 QualType withCVRQualifiers(unsigned CVR) const { 644 return withFastQualifiers(CVR); 645 } 646 647 void addFastQualifiers(unsigned TQs) { 648 assert(!(TQs & ~Qualifiers::FastMask) 649 && "non-fast qualifier bits set in mask!"); 650 Value.setInt(Value.getInt() | TQs); 651 } 652 653 void removeLocalConst(); 654 void removeLocalVolatile(); 655 void removeLocalRestrict(); 656 void removeLocalCVRQualifiers(unsigned Mask); 657 658 void removeLocalFastQualifiers() { Value.setInt(0); } 659 void removeLocalFastQualifiers(unsigned Mask) { 660 assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers"); 661 Value.setInt(Value.getInt() & ~Mask); 662 } 663 664 // Creates a type with the given qualifiers in addition to any 665 // qualifiers already on this type. 666 QualType withFastQualifiers(unsigned TQs) const { 667 QualType T = *this; 668 T.addFastQualifiers(TQs); 669 return T; 670 } 671 672 // Creates a type with exactly the given fast qualifiers, removing 673 // any existing fast qualifiers. 674 QualType withExactLocalFastQualifiers(unsigned TQs) const { 675 return withoutLocalFastQualifiers().withFastQualifiers(TQs); 676 } 677 678 // Removes fast qualifiers, but leaves any extended qualifiers in place. 679 QualType withoutLocalFastQualifiers() const { 680 QualType T = *this; 681 T.removeLocalFastQualifiers(); 682 return T; 683 } 684 685 QualType getCanonicalType() const; 686 687 /// \brief Return this type with all of the instance-specific qualifiers 688 /// removed, but without removing any qualifiers that may have been applied 689 /// through typedefs. 690 QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); } 691 692 /// \brief Retrieve the unqualified variant of the given type, 693 /// removing as little sugar as possible. 694 /// 695 /// This routine looks through various kinds of sugar to find the 696 /// least-desugared type that is unqualified. For example, given: 697 /// 698 /// \code 699 /// typedef int Integer; 700 /// typedef const Integer CInteger; 701 /// typedef CInteger DifferenceType; 702 /// \endcode 703 /// 704 /// Executing \c getUnqualifiedType() on the type \c DifferenceType will 705 /// desugar until we hit the type \c Integer, which has no qualifiers on it. 706 /// 707 /// The resulting type might still be qualified if it's an array 708 /// type. To strip qualifiers even from within an array type, use 709 /// ASTContext::getUnqualifiedArrayType. 710 inline QualType getUnqualifiedType() const; 711 712 /// getSplitUnqualifiedType - Retrieve the unqualified variant of the 713 /// given type, removing as little sugar as possible. 714 /// 715 /// Like getUnqualifiedType(), but also returns the set of 716 /// qualifiers that were built up. 717 /// 718 /// The resulting type might still be qualified if it's an array 719 /// type. To strip qualifiers even from within an array type, use 720 /// ASTContext::getUnqualifiedArrayType. 721 inline SplitQualType getSplitUnqualifiedType() const; 722 723 /// \brief Determine whether this type is more qualified than the other 724 /// given type, requiring exact equality for non-CVR qualifiers. 725 bool isMoreQualifiedThan(QualType Other) const; 726 727 /// \brief Determine whether this type is at least as qualified as the other 728 /// given type, requiring exact equality for non-CVR qualifiers. 729 bool isAtLeastAsQualifiedAs(QualType Other) const; 730 731 QualType getNonReferenceType() const; 732 733 /// \brief Determine the type of a (typically non-lvalue) expression with the 734 /// specified result type. 735 /// 736 /// This routine should be used for expressions for which the return type is 737 /// explicitly specified (e.g., in a cast or call) and isn't necessarily 738 /// an lvalue. It removes a top-level reference (since there are no 739 /// expressions of reference type) and deletes top-level cvr-qualifiers 740 /// from non-class types (in C++) or all types (in C). 741 QualType getNonLValueExprType(ASTContext &Context) const; 742 743 /// getDesugaredType - Return the specified type with any "sugar" removed from 744 /// the type. This takes off typedefs, typeof's etc. If the outer level of 745 /// the type is already concrete, it returns it unmodified. This is similar 746 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 747 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 748 /// concrete. 749 /// 750 /// Qualifiers are left in place. 751 QualType getDesugaredType(const ASTContext &Context) const { 752 return getDesugaredType(*this, Context); 753 } 754 755 SplitQualType getSplitDesugaredType() const { 756 return getSplitDesugaredType(*this); 757 } 758 759 /// \brief Return the specified type with one level of "sugar" removed from 760 /// the type. 761 /// 762 /// This routine takes off the first typedef, typeof, etc. If the outer level 763 /// of the type is already concrete, it returns it unmodified. 764 QualType getSingleStepDesugaredType(const ASTContext &Context) const; 765 766 /// IgnoreParens - Returns the specified type after dropping any 767 /// outer-level parentheses. 768 QualType IgnoreParens() const { 769 if (isa<ParenType>(*this)) 770 return QualType::IgnoreParens(*this); 771 return *this; 772 } 773 774 /// operator==/!= - Indicate whether the specified types and qualifiers are 775 /// identical. 776 friend bool operator==(const QualType &LHS, const QualType &RHS) { 777 return LHS.Value == RHS.Value; 778 } 779 friend bool operator!=(const QualType &LHS, const QualType &RHS) { 780 return LHS.Value != RHS.Value; 781 } 782 std::string getAsString() const { 783 return getAsString(split()); 784 } 785 static std::string getAsString(SplitQualType split) { 786 return getAsString(split.first, split.second); 787 } 788 static std::string getAsString(const Type *ty, Qualifiers qs); 789 790 std::string getAsString(const PrintingPolicy &Policy) const { 791 std::string S; 792 getAsStringInternal(S, Policy); 793 return S; 794 } 795 void getAsStringInternal(std::string &Str, 796 const PrintingPolicy &Policy) const { 797 return getAsStringInternal(split(), Str, Policy); 798 } 799 static void getAsStringInternal(SplitQualType split, std::string &out, 800 const PrintingPolicy &policy) { 801 return getAsStringInternal(split.first, split.second, out, policy); 802 } 803 static void getAsStringInternal(const Type *ty, Qualifiers qs, 804 std::string &out, 805 const PrintingPolicy &policy); 806 807 void dump(const char *s) const; 808 void dump() const; 809 810 void Profile(llvm::FoldingSetNodeID &ID) const { 811 ID.AddPointer(getAsOpaquePtr()); 812 } 813 814 /// getAddressSpace - Return the address space of this type. 815 inline unsigned getAddressSpace() const; 816 817 /// getObjCGCAttr - Returns gc attribute of this type. 818 inline Qualifiers::GC getObjCGCAttr() const; 819 820 /// isObjCGCWeak true when Type is objc's weak. 821 bool isObjCGCWeak() const { 822 return getObjCGCAttr() == Qualifiers::Weak; 823 } 824 825 /// isObjCGCStrong true when Type is objc's strong. 826 bool isObjCGCStrong() const { 827 return getObjCGCAttr() == Qualifiers::Strong; 828 } 829 830 /// getObjCLifetime - Returns lifetime attribute of this type. 831 Qualifiers::ObjCLifetime getObjCLifetime() const { 832 return getQualifiers().getObjCLifetime(); 833 } 834 835 bool hasNonTrivialObjCLifetime() const { 836 return getQualifiers().hasNonTrivialObjCLifetime(); 837 } 838 839 bool hasStrongOrWeakObjCLifetime() const { 840 return getQualifiers().hasStrongOrWeakObjCLifetime(); 841 } 842 843 enum DestructionKind { 844 DK_none, 845 DK_cxx_destructor, 846 DK_objc_strong_lifetime, 847 DK_objc_weak_lifetime 848 }; 849 850 /// isDestructedType - nonzero if objects of this type require 851 /// non-trivial work to clean up after. Non-zero because it's 852 /// conceivable that qualifiers (objc_gc(weak)?) could make 853 /// something require destruction. 854 DestructionKind isDestructedType() const { 855 return isDestructedTypeImpl(*this); 856 } 857 858 /// \brief Determine whether expressions of the given type are forbidden 859 /// from being lvalues in C. 860 /// 861 /// The expression types that are forbidden to be lvalues are: 862 /// - 'void', but not qualified void 863 /// - function types 864 /// 865 /// The exact rule here is C99 6.3.2.1: 866 /// An lvalue is an expression with an object type or an incomplete 867 /// type other than void. 868 bool isCForbiddenLValueType() const; 869 870 /// \brief Determine whether this type has trivial copy/move-assignment 871 /// semantics. 872 bool hasTrivialAssignment(ASTContext &Context, bool Copying) const; 873 874private: 875 // These methods are implemented in a separate translation unit; 876 // "static"-ize them to avoid creating temporary QualTypes in the 877 // caller. 878 static bool isConstant(QualType T, ASTContext& Ctx); 879 static QualType getDesugaredType(QualType T, const ASTContext &Context); 880 static SplitQualType getSplitDesugaredType(QualType T); 881 static SplitQualType getSplitUnqualifiedTypeImpl(QualType type); 882 static QualType IgnoreParens(QualType T); 883 static DestructionKind isDestructedTypeImpl(QualType type); 884}; 885 886} // end clang. 887 888namespace llvm { 889/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 890/// to a specific Type class. 891template<> struct simplify_type<const ::clang::QualType> { 892 typedef const ::clang::Type *SimpleType; 893 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 894 return Val.getTypePtr(); 895 } 896}; 897template<> struct simplify_type< ::clang::QualType> 898 : public simplify_type<const ::clang::QualType> {}; 899 900// Teach SmallPtrSet that QualType is "basically a pointer". 901template<> 902class PointerLikeTypeTraits<clang::QualType> { 903public: 904 static inline void *getAsVoidPointer(clang::QualType P) { 905 return P.getAsOpaquePtr(); 906 } 907 static inline clang::QualType getFromVoidPointer(void *P) { 908 return clang::QualType::getFromOpaquePtr(P); 909 } 910 // Various qualifiers go in low bits. 911 enum { NumLowBitsAvailable = 0 }; 912}; 913 914} // end namespace llvm 915 916namespace clang { 917 918/// \brief Base class that is common to both the \c ExtQuals and \c Type 919/// classes, which allows \c QualType to access the common fields between the 920/// two. 921/// 922class ExtQualsTypeCommonBase { 923 ExtQualsTypeCommonBase(const Type *baseType, QualType canon) 924 : BaseType(baseType), CanonicalType(canon) {} 925 926 /// \brief The "base" type of an extended qualifiers type (\c ExtQuals) or 927 /// a self-referential pointer (for \c Type). 928 /// 929 /// This pointer allows an efficient mapping from a QualType to its 930 /// underlying type pointer. 931 const Type *const BaseType; 932 933 /// \brief The canonical type of this type. A QualType. 934 QualType CanonicalType; 935 936 friend class QualType; 937 friend class Type; 938 friend class ExtQuals; 939}; 940 941/// ExtQuals - We can encode up to four bits in the low bits of a 942/// type pointer, but there are many more type qualifiers that we want 943/// to be able to apply to an arbitrary type. Therefore we have this 944/// struct, intended to be heap-allocated and used by QualType to 945/// store qualifiers. 946/// 947/// The current design tags the 'const', 'restrict', and 'volatile' qualifiers 948/// in three low bits on the QualType pointer; a fourth bit records whether 949/// the pointer is an ExtQuals node. The extended qualifiers (address spaces, 950/// Objective-C GC attributes) are much more rare. 951class ExtQuals : public ExtQualsTypeCommonBase, public llvm::FoldingSetNode { 952 // NOTE: changing the fast qualifiers should be straightforward as 953 // long as you don't make 'const' non-fast. 954 // 1. Qualifiers: 955 // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). 956 // Fast qualifiers must occupy the low-order bits. 957 // b) Update Qualifiers::FastWidth and FastMask. 958 // 2. QualType: 959 // a) Update is{Volatile,Restrict}Qualified(), defined inline. 960 // b) Update remove{Volatile,Restrict}, defined near the end of 961 // this header. 962 // 3. ASTContext: 963 // a) Update get{Volatile,Restrict}Type. 964 965 /// Quals - the immutable set of qualifiers applied by this 966 /// node; always contains extended qualifiers. 967 Qualifiers Quals; 968 969 ExtQuals *this_() { return this; } 970 971public: 972 ExtQuals(const Type *baseType, QualType canon, Qualifiers quals) 973 : ExtQualsTypeCommonBase(baseType, 974 canon.isNull() ? QualType(this_(), 0) : canon), 975 Quals(quals) 976 { 977 assert(Quals.hasNonFastQualifiers() 978 && "ExtQuals created with no fast qualifiers"); 979 assert(!Quals.hasFastQualifiers() 980 && "ExtQuals created with fast qualifiers"); 981 } 982 983 Qualifiers getQualifiers() const { return Quals; } 984 985 bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } 986 Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } 987 988 bool hasObjCLifetime() const { return Quals.hasObjCLifetime(); } 989 Qualifiers::ObjCLifetime getObjCLifetime() const { 990 return Quals.getObjCLifetime(); 991 } 992 993 bool hasAddressSpace() const { return Quals.hasAddressSpace(); } 994 unsigned getAddressSpace() const { return Quals.getAddressSpace(); } 995 996 const Type *getBaseType() const { return BaseType; } 997 998public: 999 void Profile(llvm::FoldingSetNodeID &ID) const { 1000 Profile(ID, getBaseType(), Quals); 1001 } 1002 static void Profile(llvm::FoldingSetNodeID &ID, 1003 const Type *BaseType, 1004 Qualifiers Quals) { 1005 assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!"); 1006 ID.AddPointer(BaseType); 1007 Quals.Profile(ID); 1008 } 1009}; 1010 1011/// \brief The kind of C++0x ref-qualifier associated with a function type, 1012/// which determines whether a member function's "this" object can be an 1013/// lvalue, rvalue, or neither. 1014enum RefQualifierKind { 1015 /// \brief No ref-qualifier was provided. 1016 RQ_None = 0, 1017 /// \brief An lvalue ref-qualifier was provided (\c &). 1018 RQ_LValue, 1019 /// \brief An rvalue ref-qualifier was provided (\c &&). 1020 RQ_RValue 1021}; 1022 1023/// Type - This is the base class of the type hierarchy. A central concept 1024/// with types is that each type always has a canonical type. A canonical type 1025/// is the type with any typedef names stripped out of it or the types it 1026/// references. For example, consider: 1027/// 1028/// typedef int foo; 1029/// typedef foo* bar; 1030/// 'int *' 'foo *' 'bar' 1031/// 1032/// There will be a Type object created for 'int'. Since int is canonical, its 1033/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 1034/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 1035/// there is a PointerType that represents 'int*', which, like 'int', is 1036/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 1037/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 1038/// is also 'int*'. 1039/// 1040/// Non-canonical types are useful for emitting diagnostics, without losing 1041/// information about typedefs being used. Canonical types are useful for type 1042/// comparisons (they allow by-pointer equality tests) and useful for reasoning 1043/// about whether something has a particular form (e.g. is a function type), 1044/// because they implicitly, recursively, strip all typedefs out of a type. 1045/// 1046/// Types, once created, are immutable. 1047/// 1048class Type : public ExtQualsTypeCommonBase { 1049public: 1050 enum TypeClass { 1051#define TYPE(Class, Base) Class, 1052#define LAST_TYPE(Class) TypeLast = Class, 1053#define ABSTRACT_TYPE(Class, Base) 1054#include "clang/AST/TypeNodes.def" 1055 TagFirst = Record, TagLast = Enum 1056 }; 1057 1058private: 1059 Type(const Type&); // DO NOT IMPLEMENT. 1060 void operator=(const Type&); // DO NOT IMPLEMENT. 1061 1062 /// Bitfields required by the Type class. 1063 class TypeBitfields { 1064 friend class Type; 1065 template <class T> friend class TypePropertyCache; 1066 1067 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 1068 unsigned TC : 8; 1069 1070 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 1071 /// Note that this should stay at the end of the ivars for Type so that 1072 /// subclasses can pack their bitfields into the same word. 1073 unsigned Dependent : 1; 1074 1075 /// \brief Whether this type somehow involves a template parameter, even 1076 /// if the resolution of the type does not depend on a template parameter. 1077 unsigned InstantiationDependent : 1; 1078 1079 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 1080 unsigned VariablyModified : 1; 1081 1082 /// \brief Whether this type contains an unexpanded parameter pack 1083 /// (for C++0x variadic templates). 1084 unsigned ContainsUnexpandedParameterPack : 1; 1085 1086 /// \brief Nonzero if the cache (i.e. the bitfields here starting 1087 /// with 'Cache') is valid. If so, then this is a 1088 /// LangOptions::VisibilityMode+1. 1089 mutable unsigned CacheValidAndVisibility : 2; 1090 1091 /// \brief Linkage of this type. 1092 mutable unsigned CachedLinkage : 2; 1093 1094 /// \brief Whether this type involves and local or unnamed types. 1095 mutable unsigned CachedLocalOrUnnamed : 1; 1096 1097 /// \brief FromAST - Whether this type comes from an AST file. 1098 mutable unsigned FromAST : 1; 1099 1100 bool isCacheValid() const { 1101 return (CacheValidAndVisibility != 0); 1102 } 1103 Visibility getVisibility() const { 1104 assert(isCacheValid() && "getting linkage from invalid cache"); 1105 return static_cast<Visibility>(CacheValidAndVisibility-1); 1106 } 1107 Linkage getLinkage() const { 1108 assert(isCacheValid() && "getting linkage from invalid cache"); 1109 return static_cast<Linkage>(CachedLinkage); 1110 } 1111 bool hasLocalOrUnnamedType() const { 1112 assert(isCacheValid() && "getting linkage from invalid cache"); 1113 return CachedLocalOrUnnamed; 1114 } 1115 }; 1116 enum { NumTypeBits = 18 }; 1117 1118protected: 1119 // These classes allow subclasses to somewhat cleanly pack bitfields 1120 // into Type. 1121 1122 class ArrayTypeBitfields { 1123 friend class ArrayType; 1124 1125 unsigned : NumTypeBits; 1126 1127 /// IndexTypeQuals - CVR qualifiers from declarations like 1128 /// 'int X[static restrict 4]'. For function parameters only. 1129 unsigned IndexTypeQuals : 3; 1130 1131 /// SizeModifier - storage class qualifiers from declarations like 1132 /// 'int X[static restrict 4]'. For function parameters only. 1133 /// Actually an ArrayType::ArraySizeModifier. 1134 unsigned SizeModifier : 3; 1135 }; 1136 1137 class BuiltinTypeBitfields { 1138 friend class BuiltinType; 1139 1140 unsigned : NumTypeBits; 1141 1142 /// The kind (BuiltinType::Kind) of builtin type this is. 1143 unsigned Kind : 8; 1144 }; 1145 1146 class FunctionTypeBitfields { 1147 friend class FunctionType; 1148 1149 unsigned : NumTypeBits; 1150 1151 /// Extra information which affects how the function is called, like 1152 /// regparm and the calling convention. 1153 unsigned ExtInfo : 8; 1154 1155 /// Whether the function is variadic. Only used by FunctionProtoType. 1156 unsigned Variadic : 1; 1157 1158 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1159 /// other bitfields. 1160 /// The qualifiers are part of FunctionProtoType because... 1161 /// 1162 /// C++ 8.3.5p4: The return type, the parameter type list and the 1163 /// cv-qualifier-seq, [...], are part of the function type. 1164 unsigned TypeQuals : 3; 1165 1166 /// \brief The ref-qualifier associated with a \c FunctionProtoType. 1167 /// 1168 /// This is a value of type \c RefQualifierKind. 1169 unsigned RefQualifier : 2; 1170 }; 1171 1172 class ObjCObjectTypeBitfields { 1173 friend class ObjCObjectType; 1174 1175 unsigned : NumTypeBits; 1176 1177 /// NumProtocols - The number of protocols stored directly on this 1178 /// object type. 1179 unsigned NumProtocols : 32 - NumTypeBits; 1180 }; 1181 1182 class ReferenceTypeBitfields { 1183 friend class ReferenceType; 1184 1185 unsigned : NumTypeBits; 1186 1187 /// True if the type was originally spelled with an lvalue sigil. 1188 /// This is never true of rvalue references but can also be false 1189 /// on lvalue references because of C++0x [dcl.typedef]p9, 1190 /// as follows: 1191 /// 1192 /// typedef int &ref; // lvalue, spelled lvalue 1193 /// typedef int &&rvref; // rvalue 1194 /// ref &a; // lvalue, inner ref, spelled lvalue 1195 /// ref &&a; // lvalue, inner ref 1196 /// rvref &a; // lvalue, inner ref, spelled lvalue 1197 /// rvref &&a; // rvalue, inner ref 1198 unsigned SpelledAsLValue : 1; 1199 1200 /// True if the inner type is a reference type. This only happens 1201 /// in non-canonical forms. 1202 unsigned InnerRef : 1; 1203 }; 1204 1205 class TypeWithKeywordBitfields { 1206 friend class TypeWithKeyword; 1207 1208 unsigned : NumTypeBits; 1209 1210 /// An ElaboratedTypeKeyword. 8 bits for efficient access. 1211 unsigned Keyword : 8; 1212 }; 1213 1214 class VectorTypeBitfields { 1215 friend class VectorType; 1216 1217 unsigned : NumTypeBits; 1218 1219 /// VecKind - The kind of vector, either a generic vector type or some 1220 /// target-specific vector type such as for AltiVec or Neon. 1221 unsigned VecKind : 3; 1222 1223 /// NumElements - The number of elements in the vector. 1224 unsigned NumElements : 29 - NumTypeBits; 1225 }; 1226 1227 class AttributedTypeBitfields { 1228 friend class AttributedType; 1229 1230 unsigned : NumTypeBits; 1231 1232 /// AttrKind - an AttributedType::Kind 1233 unsigned AttrKind : 32 - NumTypeBits; 1234 }; 1235 1236 union { 1237 TypeBitfields TypeBits; 1238 ArrayTypeBitfields ArrayTypeBits; 1239 AttributedTypeBitfields AttributedTypeBits; 1240 BuiltinTypeBitfields BuiltinTypeBits; 1241 FunctionTypeBitfields FunctionTypeBits; 1242 ObjCObjectTypeBitfields ObjCObjectTypeBits; 1243 ReferenceTypeBitfields ReferenceTypeBits; 1244 TypeWithKeywordBitfields TypeWithKeywordBits; 1245 VectorTypeBitfields VectorTypeBits; 1246 }; 1247 1248private: 1249 /// \brief Set whether this type comes from an AST file. 1250 void setFromAST(bool V = true) const { 1251 TypeBits.FromAST = V; 1252 } 1253 1254 template <class T> friend class TypePropertyCache; 1255 1256protected: 1257 // silence VC++ warning C4355: 'this' : used in base member initializer list 1258 Type *this_() { return this; } 1259 Type(TypeClass tc, QualType canon, bool Dependent, 1260 bool InstantiationDependent, bool VariablyModified, 1261 bool ContainsUnexpandedParameterPack) 1262 : ExtQualsTypeCommonBase(this, 1263 canon.isNull() ? QualType(this_(), 0) : canon) { 1264 TypeBits.TC = tc; 1265 TypeBits.Dependent = Dependent; 1266 TypeBits.InstantiationDependent = Dependent || InstantiationDependent; 1267 TypeBits.VariablyModified = VariablyModified; 1268 TypeBits.ContainsUnexpandedParameterPack = ContainsUnexpandedParameterPack; 1269 TypeBits.CacheValidAndVisibility = 0; 1270 TypeBits.CachedLocalOrUnnamed = false; 1271 TypeBits.CachedLinkage = NoLinkage; 1272 TypeBits.FromAST = false; 1273 } 1274 friend class ASTContext; 1275 1276 void setDependent(bool D = true) { 1277 TypeBits.Dependent = D; 1278 if (D) 1279 TypeBits.InstantiationDependent = true; 1280 } 1281 void setInstantiationDependent(bool D = true) { 1282 TypeBits.InstantiationDependent = D; } 1283 void setVariablyModified(bool VM = true) { TypeBits.VariablyModified = VM; 1284 } 1285 void setContainsUnexpandedParameterPack(bool PP = true) { 1286 TypeBits.ContainsUnexpandedParameterPack = PP; 1287 } 1288 1289public: 1290 TypeClass getTypeClass() const { return static_cast<TypeClass>(TypeBits.TC); } 1291 1292 /// \brief Whether this type comes from an AST file. 1293 bool isFromAST() const { return TypeBits.FromAST; } 1294 1295 /// \brief Whether this type is or contains an unexpanded parameter 1296 /// pack, used to support C++0x variadic templates. 1297 /// 1298 /// A type that contains a parameter pack shall be expanded by the 1299 /// ellipsis operator at some point. For example, the typedef in the 1300 /// following example contains an unexpanded parameter pack 'T': 1301 /// 1302 /// \code 1303 /// template<typename ...T> 1304 /// struct X { 1305 /// typedef T* pointer_types; // ill-formed; T is a parameter pack. 1306 /// }; 1307 /// \endcode 1308 /// 1309 /// Note that this routine does not specify which 1310 bool containsUnexpandedParameterPack() const { 1311 return TypeBits.ContainsUnexpandedParameterPack; 1312 } 1313 1314 /// Determines if this type would be canonical if it had no further 1315 /// qualification. 1316 bool isCanonicalUnqualified() const { 1317 return CanonicalType == QualType(this, 0); 1318 } 1319 1320 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 1321 /// object types, function types, and incomplete types. 1322 1323 /// isIncompleteType - Return true if this is an incomplete type. 1324 /// A type that can describe objects, but which lacks information needed to 1325 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 1326 /// routine will need to determine if the size is actually required. 1327 bool isIncompleteType() const; 1328 1329 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 1330 /// type, in other words, not a function type. 1331 bool isIncompleteOrObjectType() const { 1332 return !isFunctionType(); 1333 } 1334 1335 /// \brief Determine whether this type is an object type. 1336 bool isObjectType() const { 1337 // C++ [basic.types]p8: 1338 // An object type is a (possibly cv-qualified) type that is not a 1339 // function type, not a reference type, and not a void type. 1340 return !isReferenceType() && !isFunctionType() && !isVoidType(); 1341 } 1342 1343 /// isLiteralType - Return true if this is a literal type 1344 /// (C++0x [basic.types]p10) 1345 bool isLiteralType() const; 1346 1347 /// \brief Test if this type is a standard-layout type. 1348 /// (C++0x [basic.type]p9) 1349 bool isStandardLayoutType() const; 1350 1351 /// Helper methods to distinguish type categories. All type predicates 1352 /// operate on the canonical type, ignoring typedefs and qualifiers. 1353 1354 /// isBuiltinType - returns true if the type is a builtin type. 1355 bool isBuiltinType() const; 1356 1357 /// isSpecificBuiltinType - Test for a particular builtin type. 1358 bool isSpecificBuiltinType(unsigned K) const; 1359 1360 /// isPlaceholderType - Test for a type which does not represent an 1361 /// actual type-system type but is instead used as a placeholder for 1362 /// various convenient purposes within Clang. All such types are 1363 /// BuiltinTypes. 1364 bool isPlaceholderType() const; 1365 1366 /// isSpecificPlaceholderType - Test for a specific placeholder type. 1367 bool isSpecificPlaceholderType(unsigned K) const; 1368 1369 /// isIntegerType() does *not* include complex integers (a GCC extension). 1370 /// isComplexIntegerType() can be used to test for complex integers. 1371 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 1372 bool isEnumeralType() const; 1373 bool isBooleanType() const; 1374 bool isCharType() const; 1375 bool isWideCharType() const; 1376 bool isChar16Type() const; 1377 bool isChar32Type() const; 1378 bool isAnyCharacterType() const; 1379 bool isIntegralType(ASTContext &Ctx) const; 1380 1381 /// \brief Determine whether this type is an integral or enumeration type. 1382 bool isIntegralOrEnumerationType() const; 1383 /// \brief Determine whether this type is an integral or unscoped enumeration 1384 /// type. 1385 bool isIntegralOrUnscopedEnumerationType() const; 1386 1387 /// Floating point categories. 1388 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 1389 /// isComplexType() does *not* include complex integers (a GCC extension). 1390 /// isComplexIntegerType() can be used to test for complex integers. 1391 bool isComplexType() const; // C99 6.2.5p11 (complex) 1392 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 1393 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 1394 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 1395 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 1396 bool isVoidType() const; // C99 6.2.5p19 1397 bool isDerivedType() const; // C99 6.2.5p20 1398 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 1399 bool isAggregateType() const; 1400 bool isFundamentalType() const; 1401 bool isCompoundType() const; 1402 1403 // Type Predicates: Check to see if this type is structurally the specified 1404 // type, ignoring typedefs and qualifiers. 1405 bool isFunctionType() const; 1406 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 1407 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 1408 bool isPointerType() const; 1409 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 1410 bool isBlockPointerType() const; 1411 bool isVoidPointerType() const; 1412 bool isReferenceType() const; 1413 bool isLValueReferenceType() const; 1414 bool isRValueReferenceType() const; 1415 bool isFunctionPointerType() const; 1416 bool isMemberPointerType() const; 1417 bool isMemberFunctionPointerType() const; 1418 bool isMemberDataPointerType() const; 1419 bool isArrayType() const; 1420 bool isConstantArrayType() const; 1421 bool isIncompleteArrayType() const; 1422 bool isVariableArrayType() const; 1423 bool isDependentSizedArrayType() const; 1424 bool isRecordType() const; 1425 bool isClassType() const; 1426 bool isStructureType() const; 1427 bool isStructureOrClassType() const; 1428 bool isUnionType() const; 1429 bool isComplexIntegerType() const; // GCC _Complex integer type. 1430 bool isVectorType() const; // GCC vector type. 1431 bool isExtVectorType() const; // Extended vector type. 1432 bool isObjCObjectPointerType() const; // pointer to ObjC object 1433 bool isObjCRetainableType() const; // ObjC object or block pointer 1434 bool isObjCLifetimeType() const; // (array of)* retainable type 1435 bool isObjCIndirectLifetimeType() const; // (pointer to)* lifetime type 1436 bool isObjCNSObjectType() const; // __attribute__((NSObject)) 1437 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 1438 // for the common case. 1439 bool isObjCObjectType() const; // NSString or typeof(*(id)0) 1440 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 1441 bool isObjCQualifiedIdType() const; // id<foo> 1442 bool isObjCQualifiedClassType() const; // Class<foo> 1443 bool isObjCObjectOrInterfaceType() const; 1444 bool isObjCIdType() const; // id 1445 bool isObjCClassType() const; // Class 1446 bool isObjCSelType() const; // Class 1447 bool isObjCBuiltinType() const; // 'id' or 'Class' 1448 bool isObjCARCBridgableType() const; 1449 bool isCARCBridgableType() const; 1450 bool isTemplateTypeParmType() const; // C++ template type parameter 1451 bool isNullPtrType() const; // C++0x nullptr_t 1452 bool isAtomicType() const; // C1X _Atomic() 1453 1454 /// Determines if this type, which must satisfy 1455 /// isObjCLifetimeType(), is implicitly __unsafe_unretained rather 1456 /// than implicitly __strong. 1457 bool isObjCARCImplicitlyUnretainedType() const; 1458 1459 /// Return the implicit lifetime for this type, which must not be dependent. 1460 Qualifiers::ObjCLifetime getObjCARCImplicitLifetime() const; 1461 1462 enum ScalarTypeKind { 1463 STK_CPointer, 1464 STK_BlockPointer, 1465 STK_ObjCObjectPointer, 1466 STK_MemberPointer, 1467 STK_Bool, 1468 STK_Integral, 1469 STK_Floating, 1470 STK_IntegralComplex, 1471 STK_FloatingComplex 1472 }; 1473 /// getScalarTypeKind - Given that this is a scalar type, classify it. 1474 ScalarTypeKind getScalarTypeKind() const; 1475 1476 /// isDependentType - Whether this type is a dependent type, meaning 1477 /// that its definition somehow depends on a template parameter 1478 /// (C++ [temp.dep.type]). 1479 bool isDependentType() const { return TypeBits.Dependent; } 1480 1481 /// \brief Determine whether this type is an instantiation-dependent type, 1482 /// meaning that the type involves a template parameter (even if the 1483 /// definition does not actually depend on the type substituted for that 1484 /// template parameter). 1485 bool isInstantiationDependentType() const { 1486 return TypeBits.InstantiationDependent; 1487 } 1488 1489 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 1490 bool isVariablyModifiedType() const { return TypeBits.VariablyModified; } 1491 1492 /// \brief Whether this type involves a variable-length array type 1493 /// with a definite size. 1494 bool hasSizedVLAType() const; 1495 1496 /// \brief Whether this type is or contains a local or unnamed type. 1497 bool hasUnnamedOrLocalType() const; 1498 1499 bool isOverloadableType() const; 1500 1501 /// \brief Determine wither this type is a C++ elaborated-type-specifier. 1502 bool isElaboratedTypeSpecifier() const; 1503 1504 bool canDecayToPointerType() const; 1505 1506 /// hasPointerRepresentation - Whether this type is represented 1507 /// natively as a pointer; this includes pointers, references, block 1508 /// pointers, and Objective-C interface, qualified id, and qualified 1509 /// interface types, as well as nullptr_t. 1510 bool hasPointerRepresentation() const; 1511 1512 /// hasObjCPointerRepresentation - Whether this type can represent 1513 /// an objective pointer type for the purpose of GC'ability 1514 bool hasObjCPointerRepresentation() const; 1515 1516 /// \brief Determine whether this type has an integer representation 1517 /// of some sort, e.g., it is an integer type or a vector. 1518 bool hasIntegerRepresentation() const; 1519 1520 /// \brief Determine whether this type has an signed integer representation 1521 /// of some sort, e.g., it is an signed integer type or a vector. 1522 bool hasSignedIntegerRepresentation() const; 1523 1524 /// \brief Determine whether this type has an unsigned integer representation 1525 /// of some sort, e.g., it is an unsigned integer type or a vector. 1526 bool hasUnsignedIntegerRepresentation() const; 1527 1528 /// \brief Determine whether this type has a floating-point representation 1529 /// of some sort, e.g., it is a floating-point type or a vector thereof. 1530 bool hasFloatingRepresentation() const; 1531 1532 // Type Checking Functions: Check to see if this type is structurally the 1533 // specified type, ignoring typedefs and qualifiers, and return a pointer to 1534 // the best type we can. 1535 const RecordType *getAsStructureType() const; 1536 /// NOTE: getAs*ArrayType are methods on ASTContext. 1537 const RecordType *getAsUnionType() const; 1538 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 1539 // The following is a convenience method that returns an ObjCObjectPointerType 1540 // for object declared using an interface. 1541 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 1542 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 1543 const ObjCObjectPointerType *getAsObjCQualifiedClassType() const; 1544 const ObjCObjectType *getAsObjCQualifiedInterfaceType() const; 1545 const CXXRecordDecl *getCXXRecordDeclForPointerType() const; 1546 1547 /// \brief Retrieves the CXXRecordDecl that this type refers to, either 1548 /// because the type is a RecordType or because it is the injected-class-name 1549 /// type of a class template or class template partial specialization. 1550 CXXRecordDecl *getAsCXXRecordDecl() const; 1551 1552 /// \brief Get the AutoType whose type will be deduced for a variable with 1553 /// an initializer of this type. This looks through declarators like pointer 1554 /// types, but not through decltype or typedefs. 1555 AutoType *getContainedAutoType() const; 1556 1557 /// Member-template getAs<specific type>'. Look through sugar for 1558 /// an instance of <specific type>. This scheme will eventually 1559 /// replace the specific getAsXXXX methods above. 1560 /// 1561 /// There are some specializations of this member template listed 1562 /// immediately following this class. 1563 template <typename T> const T *getAs() const; 1564 1565 /// A variant of getAs<> for array types which silently discards 1566 /// qualifiers from the outermost type. 1567 const ArrayType *getAsArrayTypeUnsafe() const; 1568 1569 /// Member-template castAs<specific type>. Look through sugar for 1570 /// the underlying instance of <specific type>. 1571 /// 1572 /// This method has the same relationship to getAs<T> as cast<T> has 1573 /// to dyn_cast<T>; which is to say, the underlying type *must* 1574 /// have the intended type, and this method will never return null. 1575 template <typename T> const T *castAs() const; 1576 1577 /// A variant of castAs<> for array type which silently discards 1578 /// qualifiers from the outermost type. 1579 const ArrayType *castAsArrayTypeUnsafe() const; 1580 1581 /// getBaseElementTypeUnsafe - Get the base element type of this 1582 /// type, potentially discarding type qualifiers. This method 1583 /// should never be used when type qualifiers are meaningful. 1584 const Type *getBaseElementTypeUnsafe() const; 1585 1586 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 1587 /// element type of the array, potentially with type qualifiers missing. 1588 /// This method should never be used when type qualifiers are meaningful. 1589 const Type *getArrayElementTypeNoTypeQual() const; 1590 1591 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 1592 /// pointer, this returns the respective pointee. 1593 QualType getPointeeType() const; 1594 1595 /// getUnqualifiedDesugaredType() - Return the specified type with 1596 /// any "sugar" removed from the type, removing any typedefs, 1597 /// typeofs, etc., as well as any qualifiers. 1598 const Type *getUnqualifiedDesugaredType() const; 1599 1600 /// More type predicates useful for type checking/promotion 1601 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 1602 1603 /// isSignedIntegerType - Return true if this is an integer type that is 1604 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 1605 /// or an enum decl which has a signed representation. 1606 bool isSignedIntegerType() const; 1607 1608 /// isUnsignedIntegerType - Return true if this is an integer type that is 1609 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], 1610 /// or an enum decl which has an unsigned representation. 1611 bool isUnsignedIntegerType() const; 1612 1613 /// Determines whether this is an integer type that is signed or an 1614 /// enumeration types whose underlying type is a signed integer type. 1615 bool isSignedIntegerOrEnumerationType() const; 1616 1617 /// Determines whether this is an integer type that is unsigned or an 1618 /// enumeration types whose underlying type is a unsigned integer type. 1619 bool isUnsignedIntegerOrEnumerationType() const; 1620 1621 /// isConstantSizeType - Return true if this is not a variable sized type, 1622 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 1623 /// incomplete types. 1624 bool isConstantSizeType() const; 1625 1626 /// isSpecifierType - Returns true if this type can be represented by some 1627 /// set of type specifiers. 1628 bool isSpecifierType() const; 1629 1630 /// \brief Determine the linkage of this type. 1631 Linkage getLinkage() const; 1632 1633 /// \brief Determine the visibility of this type. 1634 Visibility getVisibility() const; 1635 1636 /// \brief Determine the linkage and visibility of this type. 1637 std::pair<Linkage,Visibility> getLinkageAndVisibility() const; 1638 1639 /// \brief Note that the linkage is no longer known. 1640 void ClearLinkageCache(); 1641 1642 const char *getTypeClassName() const; 1643 1644 QualType getCanonicalTypeInternal() const { 1645 return CanonicalType; 1646 } 1647 CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h 1648 void dump() const; 1649 1650 static bool classof(const Type *) { return true; } 1651 1652 friend class ASTReader; 1653 friend class ASTWriter; 1654}; 1655 1656template <> inline const TypedefType *Type::getAs() const { 1657 return dyn_cast<TypedefType>(this); 1658} 1659 1660// We can do canonical leaf types faster, because we don't have to 1661// worry about preserving child type decoration. 1662#define TYPE(Class, Base) 1663#define LEAF_TYPE(Class) \ 1664template <> inline const Class##Type *Type::getAs() const { \ 1665 return dyn_cast<Class##Type>(CanonicalType); \ 1666} \ 1667template <> inline const Class##Type *Type::castAs() const { \ 1668 return cast<Class##Type>(CanonicalType); \ 1669} 1670#include "clang/AST/TypeNodes.def" 1671 1672 1673/// BuiltinType - This class is used for builtin types like 'int'. Builtin 1674/// types are always canonical and have a literal name field. 1675class BuiltinType : public Type { 1676public: 1677 enum Kind { 1678 Void, 1679 1680 Bool, // This is bool and/or _Bool. 1681 Char_U, // This is 'char' for targets where char is unsigned. 1682 UChar, // This is explicitly qualified unsigned char. 1683 WChar_U, // This is 'wchar_t' for C++, when unsigned. 1684 Char16, // This is 'char16_t' for C++. 1685 Char32, // This is 'char32_t' for C++. 1686 UShort, 1687 UInt, 1688 ULong, 1689 ULongLong, 1690 UInt128, // __uint128_t 1691 1692 Char_S, // This is 'char' for targets where char is signed. 1693 SChar, // This is explicitly qualified signed char. 1694 WChar_S, // This is 'wchar_t' for C++, when signed. 1695 Short, 1696 Int, 1697 Long, 1698 LongLong, 1699 Int128, // __int128_t 1700 1701 Float, Double, LongDouble, 1702 1703 NullPtr, // This is the type of C++0x 'nullptr'. 1704 1705 /// The primitive Objective C 'id' type. The user-visible 'id' 1706 /// type is a typedef of an ObjCObjectPointerType to an 1707 /// ObjCObjectType with this as its base. In fact, this only ever 1708 /// shows up in an AST as the base type of an ObjCObjectType. 1709 ObjCId, 1710 1711 /// The primitive Objective C 'Class' type. The user-visible 1712 /// 'Class' type is a typedef of an ObjCObjectPointerType to an 1713 /// ObjCObjectType with this as its base. In fact, this only ever 1714 /// shows up in an AST as the base type of an ObjCObjectType. 1715 ObjCClass, 1716 1717 /// The primitive Objective C 'SEL' type. The user-visible 'SEL' 1718 /// type is a typedef of a PointerType to this. 1719 ObjCSel, 1720 1721 /// This represents the type of an expression whose type is 1722 /// totally unknown, e.g. 'T::foo'. It is permitted for this to 1723 /// appear in situations where the structure of the type is 1724 /// theoretically deducible. 1725 Dependent, 1726 1727 /// The type of an unresolved overload set. A placeholder type. 1728 /// Expressions with this type have one of the following basic 1729 /// forms, with parentheses generally permitted: 1730 /// foo # possibly qualified, not if an implicit access 1731 /// foo # possibly qualified, not if an implicit access 1732 /// &foo # possibly qualified, not if an implicit access 1733 /// x->foo # only if might be a static member function 1734 /// &x->foo # only if might be a static member function 1735 /// &Class::foo # when a pointer-to-member; sub-expr also has this type 1736 /// OverloadExpr::find can be used to analyze the expression. 1737 Overload, 1738 1739 /// The type of a bound C++ non-static member function. 1740 /// A placeholder type. Expressions with this type have one of the 1741 /// following basic forms: 1742 /// foo # if an implicit access 1743 /// x->foo # if only contains non-static members 1744 BoundMember, 1745 1746 /// __builtin_any_type. A placeholder type. Useful for clients 1747 /// like debuggers that don't know what type to give something. 1748 /// Only a small number of operations are valid on expressions of 1749 /// unknown type, most notably explicit casts. 1750 UnknownAny 1751 }; 1752 1753public: 1754 BuiltinType(Kind K) 1755 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent), 1756 /*InstantiationDependent=*/(K == Dependent), 1757 /*VariablyModified=*/false, 1758 /*Unexpanded paramter pack=*/false) { 1759 BuiltinTypeBits.Kind = K; 1760 } 1761 1762 Kind getKind() const { return static_cast<Kind>(BuiltinTypeBits.Kind); } 1763 const char *getName(const PrintingPolicy &Policy) const; 1764 1765 bool isSugared() const { return false; } 1766 QualType desugar() const { return QualType(this, 0); } 1767 1768 bool isInteger() const { 1769 return getKind() >= Bool && getKind() <= Int128; 1770 } 1771 1772 bool isSignedInteger() const { 1773 return getKind() >= Char_S && getKind() <= Int128; 1774 } 1775 1776 bool isUnsignedInteger() const { 1777 return getKind() >= Bool && getKind() <= UInt128; 1778 } 1779 1780 bool isFloatingPoint() const { 1781 return getKind() >= Float && getKind() <= LongDouble; 1782 } 1783 1784 /// Determines whether this type is a placeholder type, i.e. a type 1785 /// which cannot appear in arbitrary positions in a fully-formed 1786 /// expression. 1787 bool isPlaceholderType() const { 1788 return getKind() >= Overload; 1789 } 1790 1791 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1792 static bool classof(const BuiltinType *) { return true; } 1793}; 1794 1795/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1796/// types (_Complex float etc) as well as the GCC integer complex extensions. 1797/// 1798class ComplexType : public Type, public llvm::FoldingSetNode { 1799 QualType ElementType; 1800 ComplexType(QualType Element, QualType CanonicalPtr) : 1801 Type(Complex, CanonicalPtr, Element->isDependentType(), 1802 Element->isInstantiationDependentType(), 1803 Element->isVariablyModifiedType(), 1804 Element->containsUnexpandedParameterPack()), 1805 ElementType(Element) { 1806 } 1807 friend class ASTContext; // ASTContext creates these. 1808 1809public: 1810 QualType getElementType() const { return ElementType; } 1811 1812 bool isSugared() const { return false; } 1813 QualType desugar() const { return QualType(this, 0); } 1814 1815 void Profile(llvm::FoldingSetNodeID &ID) { 1816 Profile(ID, getElementType()); 1817 } 1818 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1819 ID.AddPointer(Element.getAsOpaquePtr()); 1820 } 1821 1822 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1823 static bool classof(const ComplexType *) { return true; } 1824}; 1825 1826/// ParenType - Sugar for parentheses used when specifying types. 1827/// 1828class ParenType : public Type, public llvm::FoldingSetNode { 1829 QualType Inner; 1830 1831 ParenType(QualType InnerType, QualType CanonType) : 1832 Type(Paren, CanonType, InnerType->isDependentType(), 1833 InnerType->isInstantiationDependentType(), 1834 InnerType->isVariablyModifiedType(), 1835 InnerType->containsUnexpandedParameterPack()), 1836 Inner(InnerType) { 1837 } 1838 friend class ASTContext; // ASTContext creates these. 1839 1840public: 1841 1842 QualType getInnerType() const { return Inner; } 1843 1844 bool isSugared() const { return true; } 1845 QualType desugar() const { return getInnerType(); } 1846 1847 void Profile(llvm::FoldingSetNodeID &ID) { 1848 Profile(ID, getInnerType()); 1849 } 1850 static void Profile(llvm::FoldingSetNodeID &ID, QualType Inner) { 1851 Inner.Profile(ID); 1852 } 1853 1854 static bool classof(const Type *T) { return T->getTypeClass() == Paren; } 1855 static bool classof(const ParenType *) { return true; } 1856}; 1857 1858/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1859/// 1860class PointerType : public Type, public llvm::FoldingSetNode { 1861 QualType PointeeType; 1862 1863 PointerType(QualType Pointee, QualType CanonicalPtr) : 1864 Type(Pointer, CanonicalPtr, Pointee->isDependentType(), 1865 Pointee->isInstantiationDependentType(), 1866 Pointee->isVariablyModifiedType(), 1867 Pointee->containsUnexpandedParameterPack()), 1868 PointeeType(Pointee) { 1869 } 1870 friend class ASTContext; // ASTContext creates these. 1871 1872public: 1873 1874 QualType getPointeeType() const { return PointeeType; } 1875 1876 bool isSugared() const { return false; } 1877 QualType desugar() const { return QualType(this, 0); } 1878 1879 void Profile(llvm::FoldingSetNodeID &ID) { 1880 Profile(ID, getPointeeType()); 1881 } 1882 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1883 ID.AddPointer(Pointee.getAsOpaquePtr()); 1884 } 1885 1886 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1887 static bool classof(const PointerType *) { return true; } 1888}; 1889 1890/// BlockPointerType - pointer to a block type. 1891/// This type is to represent types syntactically represented as 1892/// "void (^)(int)", etc. Pointee is required to always be a function type. 1893/// 1894class BlockPointerType : public Type, public llvm::FoldingSetNode { 1895 QualType PointeeType; // Block is some kind of pointer type 1896 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1897 Type(BlockPointer, CanonicalCls, Pointee->isDependentType(), 1898 Pointee->isInstantiationDependentType(), 1899 Pointee->isVariablyModifiedType(), 1900 Pointee->containsUnexpandedParameterPack()), 1901 PointeeType(Pointee) { 1902 } 1903 friend class ASTContext; // ASTContext creates these. 1904 1905public: 1906 1907 // Get the pointee type. Pointee is required to always be a function type. 1908 QualType getPointeeType() const { return PointeeType; } 1909 1910 bool isSugared() const { return false; } 1911 QualType desugar() const { return QualType(this, 0); } 1912 1913 void Profile(llvm::FoldingSetNodeID &ID) { 1914 Profile(ID, getPointeeType()); 1915 } 1916 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1917 ID.AddPointer(Pointee.getAsOpaquePtr()); 1918 } 1919 1920 static bool classof(const Type *T) { 1921 return T->getTypeClass() == BlockPointer; 1922 } 1923 static bool classof(const BlockPointerType *) { return true; } 1924}; 1925 1926/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 1927/// 1928class ReferenceType : public Type, public llvm::FoldingSetNode { 1929 QualType PointeeType; 1930 1931protected: 1932 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 1933 bool SpelledAsLValue) : 1934 Type(tc, CanonicalRef, Referencee->isDependentType(), 1935 Referencee->isInstantiationDependentType(), 1936 Referencee->isVariablyModifiedType(), 1937 Referencee->containsUnexpandedParameterPack()), 1938 PointeeType(Referencee) 1939 { 1940 ReferenceTypeBits.SpelledAsLValue = SpelledAsLValue; 1941 ReferenceTypeBits.InnerRef = Referencee->isReferenceType(); 1942 } 1943 1944public: 1945 bool isSpelledAsLValue() const { return ReferenceTypeBits.SpelledAsLValue; } 1946 bool isInnerRef() const { return ReferenceTypeBits.InnerRef; } 1947 1948 QualType getPointeeTypeAsWritten() const { return PointeeType; } 1949 QualType getPointeeType() const { 1950 // FIXME: this might strip inner qualifiers; okay? 1951 const ReferenceType *T = this; 1952 while (T->isInnerRef()) 1953 T = T->PointeeType->castAs<ReferenceType>(); 1954 return T->PointeeType; 1955 } 1956 1957 void Profile(llvm::FoldingSetNodeID &ID) { 1958 Profile(ID, PointeeType, isSpelledAsLValue()); 1959 } 1960 static void Profile(llvm::FoldingSetNodeID &ID, 1961 QualType Referencee, 1962 bool SpelledAsLValue) { 1963 ID.AddPointer(Referencee.getAsOpaquePtr()); 1964 ID.AddBoolean(SpelledAsLValue); 1965 } 1966 1967 static bool classof(const Type *T) { 1968 return T->getTypeClass() == LValueReference || 1969 T->getTypeClass() == RValueReference; 1970 } 1971 static bool classof(const ReferenceType *) { return true; } 1972}; 1973 1974/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 1975/// 1976class LValueReferenceType : public ReferenceType { 1977 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 1978 bool SpelledAsLValue) : 1979 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 1980 {} 1981 friend class ASTContext; // ASTContext creates these 1982public: 1983 bool isSugared() const { return false; } 1984 QualType desugar() const { return QualType(this, 0); } 1985 1986 static bool classof(const Type *T) { 1987 return T->getTypeClass() == LValueReference; 1988 } 1989 static bool classof(const LValueReferenceType *) { return true; } 1990}; 1991 1992/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 1993/// 1994class RValueReferenceType : public ReferenceType { 1995 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 1996 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 1997 } 1998 friend class ASTContext; // ASTContext creates these 1999public: 2000 bool isSugared() const { return false; } 2001 QualType desugar() const { return QualType(this, 0); } 2002 2003 static bool classof(const Type *T) { 2004 return T->getTypeClass() == RValueReference; 2005 } 2006 static bool classof(const RValueReferenceType *) { return true; } 2007}; 2008 2009/// MemberPointerType - C++ 8.3.3 - Pointers to members 2010/// 2011class MemberPointerType : public Type, public llvm::FoldingSetNode { 2012 QualType PointeeType; 2013 /// The class of which the pointee is a member. Must ultimately be a 2014 /// RecordType, but could be a typedef or a template parameter too. 2015 const Type *Class; 2016 2017 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 2018 Type(MemberPointer, CanonicalPtr, 2019 Cls->isDependentType() || Pointee->isDependentType(), 2020 (Cls->isInstantiationDependentType() || 2021 Pointee->isInstantiationDependentType()), 2022 Pointee->isVariablyModifiedType(), 2023 (Cls->containsUnexpandedParameterPack() || 2024 Pointee->containsUnexpandedParameterPack())), 2025 PointeeType(Pointee), Class(Cls) { 2026 } 2027 friend class ASTContext; // ASTContext creates these. 2028 2029public: 2030 QualType getPointeeType() const { return PointeeType; } 2031 2032 /// Returns true if the member type (i.e. the pointee type) is a 2033 /// function type rather than a data-member type. 2034 bool isMemberFunctionPointer() const { 2035 return PointeeType->isFunctionProtoType(); 2036 } 2037 2038 /// Returns true if the member type (i.e. the pointee type) is a 2039 /// data type rather than a function type. 2040 bool isMemberDataPointer() const { 2041 return !PointeeType->isFunctionProtoType(); 2042 } 2043 2044 const Type *getClass() const { return Class; } 2045 2046 bool isSugared() const { return false; } 2047 QualType desugar() const { return QualType(this, 0); } 2048 2049 void Profile(llvm::FoldingSetNodeID &ID) { 2050 Profile(ID, getPointeeType(), getClass()); 2051 } 2052 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 2053 const Type *Class) { 2054 ID.AddPointer(Pointee.getAsOpaquePtr()); 2055 ID.AddPointer(Class); 2056 } 2057 2058 static bool classof(const Type *T) { 2059 return T->getTypeClass() == MemberPointer; 2060 } 2061 static bool classof(const MemberPointerType *) { return true; } 2062}; 2063 2064/// ArrayType - C99 6.7.5.2 - Array Declarators. 2065/// 2066class ArrayType : public Type, public llvm::FoldingSetNode { 2067public: 2068 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 2069 /// an array with a static size (e.g. int X[static 4]), or an array 2070 /// with a star size (e.g. int X[*]). 2071 /// 'static' is only allowed on function parameters. 2072 enum ArraySizeModifier { 2073 Normal, Static, Star 2074 }; 2075private: 2076 /// ElementType - The element type of the array. 2077 QualType ElementType; 2078 2079protected: 2080 // C++ [temp.dep.type]p1: 2081 // A type is dependent if it is... 2082 // - an array type constructed from any dependent type or whose 2083 // size is specified by a constant expression that is 2084 // value-dependent, 2085 ArrayType(TypeClass tc, QualType et, QualType can, 2086 ArraySizeModifier sm, unsigned tq, 2087 bool ContainsUnexpandedParameterPack) 2088 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray, 2089 et->isInstantiationDependentType() || tc == DependentSizedArray, 2090 (tc == VariableArray || et->isVariablyModifiedType()), 2091 ContainsUnexpandedParameterPack), 2092 ElementType(et) { 2093 ArrayTypeBits.IndexTypeQuals = tq; 2094 ArrayTypeBits.SizeModifier = sm; 2095 } 2096 2097 friend class ASTContext; // ASTContext creates these. 2098 2099public: 2100 QualType getElementType() const { return ElementType; } 2101 ArraySizeModifier getSizeModifier() const { 2102 return ArraySizeModifier(ArrayTypeBits.SizeModifier); 2103 } 2104 Qualifiers getIndexTypeQualifiers() const { 2105 return Qualifiers::fromCVRMask(getIndexTypeCVRQualifiers()); 2106 } 2107 unsigned getIndexTypeCVRQualifiers() const { 2108 return ArrayTypeBits.IndexTypeQuals; 2109 } 2110 2111 static bool classof(const Type *T) { 2112 return T->getTypeClass() == ConstantArray || 2113 T->getTypeClass() == VariableArray || 2114 T->getTypeClass() == IncompleteArray || 2115 T->getTypeClass() == DependentSizedArray; 2116 } 2117 static bool classof(const ArrayType *) { return true; } 2118}; 2119 2120/// ConstantArrayType - This class represents the canonical version of 2121/// C arrays with a specified constant size. For example, the canonical 2122/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 2123/// type is 'int' and the size is 404. 2124class ConstantArrayType : public ArrayType { 2125 llvm::APInt Size; // Allows us to unique the type. 2126 2127 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 2128 ArraySizeModifier sm, unsigned tq) 2129 : ArrayType(ConstantArray, et, can, sm, tq, 2130 et->containsUnexpandedParameterPack()), 2131 Size(size) {} 2132protected: 2133 ConstantArrayType(TypeClass tc, QualType et, QualType can, 2134 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 2135 : ArrayType(tc, et, can, sm, tq, et->containsUnexpandedParameterPack()), 2136 Size(size) {} 2137 friend class ASTContext; // ASTContext creates these. 2138public: 2139 const llvm::APInt &getSize() const { return Size; } 2140 bool isSugared() const { return false; } 2141 QualType desugar() const { return QualType(this, 0); } 2142 2143 2144 /// \brief Determine the number of bits required to address a member of 2145 // an array with the given element type and number of elements. 2146 static unsigned getNumAddressingBits(ASTContext &Context, 2147 QualType ElementType, 2148 const llvm::APInt &NumElements); 2149 2150 /// \brief Determine the maximum number of active bits that an array's size 2151 /// can require, which limits the maximum size of the array. 2152 static unsigned getMaxSizeBits(ASTContext &Context); 2153 2154 void Profile(llvm::FoldingSetNodeID &ID) { 2155 Profile(ID, getElementType(), getSize(), 2156 getSizeModifier(), getIndexTypeCVRQualifiers()); 2157 } 2158 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 2159 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 2160 unsigned TypeQuals) { 2161 ID.AddPointer(ET.getAsOpaquePtr()); 2162 ID.AddInteger(ArraySize.getZExtValue()); 2163 ID.AddInteger(SizeMod); 2164 ID.AddInteger(TypeQuals); 2165 } 2166 static bool classof(const Type *T) { 2167 return T->getTypeClass() == ConstantArray; 2168 } 2169 static bool classof(const ConstantArrayType *) { return true; } 2170}; 2171 2172/// IncompleteArrayType - This class represents C arrays with an unspecified 2173/// size. For example 'int A[]' has an IncompleteArrayType where the element 2174/// type is 'int' and the size is unspecified. 2175class IncompleteArrayType : public ArrayType { 2176 2177 IncompleteArrayType(QualType et, QualType can, 2178 ArraySizeModifier sm, unsigned tq) 2179 : ArrayType(IncompleteArray, et, can, sm, tq, 2180 et->containsUnexpandedParameterPack()) {} 2181 friend class ASTContext; // ASTContext creates these. 2182public: 2183 bool isSugared() const { return false; } 2184 QualType desugar() const { return QualType(this, 0); } 2185 2186 static bool classof(const Type *T) { 2187 return T->getTypeClass() == IncompleteArray; 2188 } 2189 static bool classof(const IncompleteArrayType *) { return true; } 2190 2191 friend class StmtIteratorBase; 2192 2193 void Profile(llvm::FoldingSetNodeID &ID) { 2194 Profile(ID, getElementType(), getSizeModifier(), 2195 getIndexTypeCVRQualifiers()); 2196 } 2197 2198 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 2199 ArraySizeModifier SizeMod, unsigned TypeQuals) { 2200 ID.AddPointer(ET.getAsOpaquePtr()); 2201 ID.AddInteger(SizeMod); 2202 ID.AddInteger(TypeQuals); 2203 } 2204}; 2205 2206/// VariableArrayType - This class represents C arrays with a specified size 2207/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 2208/// Since the size expression is an arbitrary expression, we store it as such. 2209/// 2210/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 2211/// should not be: two lexically equivalent variable array types could mean 2212/// different things, for example, these variables do not have the same type 2213/// dynamically: 2214/// 2215/// void foo(int x) { 2216/// int Y[x]; 2217/// ++x; 2218/// int Z[x]; 2219/// } 2220/// 2221class VariableArrayType : public ArrayType { 2222 /// SizeExpr - An assignment expression. VLA's are only permitted within 2223 /// a function block. 2224 Stmt *SizeExpr; 2225 /// Brackets - The left and right array brackets. 2226 SourceRange Brackets; 2227 2228 VariableArrayType(QualType et, QualType can, Expr *e, 2229 ArraySizeModifier sm, unsigned tq, 2230 SourceRange brackets) 2231 : ArrayType(VariableArray, et, can, sm, tq, 2232 et->containsUnexpandedParameterPack()), 2233 SizeExpr((Stmt*) e), Brackets(brackets) {} 2234 friend class ASTContext; // ASTContext creates these. 2235 2236public: 2237 Expr *getSizeExpr() const { 2238 // We use C-style casts instead of cast<> here because we do not wish 2239 // to have a dependency of Type.h on Stmt.h/Expr.h. 2240 return (Expr*) SizeExpr; 2241 } 2242 SourceRange getBracketsRange() const { return Brackets; } 2243 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 2244 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 2245 2246 bool isSugared() const { return false; } 2247 QualType desugar() const { return QualType(this, 0); } 2248 2249 static bool classof(const Type *T) { 2250 return T->getTypeClass() == VariableArray; 2251 } 2252 static bool classof(const VariableArrayType *) { return true; } 2253 2254 friend class StmtIteratorBase; 2255 2256 void Profile(llvm::FoldingSetNodeID &ID) { 2257 llvm_unreachable("Cannot unique VariableArrayTypes."); 2258 } 2259}; 2260 2261/// DependentSizedArrayType - This type represents an array type in 2262/// C++ whose size is a value-dependent expression. For example: 2263/// 2264/// \code 2265/// template<typename T, int Size> 2266/// class array { 2267/// T data[Size]; 2268/// }; 2269/// \endcode 2270/// 2271/// For these types, we won't actually know what the array bound is 2272/// until template instantiation occurs, at which point this will 2273/// become either a ConstantArrayType or a VariableArrayType. 2274class DependentSizedArrayType : public ArrayType { 2275 const ASTContext &Context; 2276 2277 /// \brief An assignment expression that will instantiate to the 2278 /// size of the array. 2279 /// 2280 /// The expression itself might be NULL, in which case the array 2281 /// type will have its size deduced from an initializer. 2282 Stmt *SizeExpr; 2283 2284 /// Brackets - The left and right array brackets. 2285 SourceRange Brackets; 2286 2287 DependentSizedArrayType(const ASTContext &Context, QualType et, QualType can, 2288 Expr *e, ArraySizeModifier sm, unsigned tq, 2289 SourceRange brackets); 2290 2291 friend class ASTContext; // ASTContext creates these. 2292 2293public: 2294 Expr *getSizeExpr() const { 2295 // We use C-style casts instead of cast<> here because we do not wish 2296 // to have a dependency of Type.h on Stmt.h/Expr.h. 2297 return (Expr*) SizeExpr; 2298 } 2299 SourceRange getBracketsRange() const { return Brackets; } 2300 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 2301 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 2302 2303 bool isSugared() const { return false; } 2304 QualType desugar() const { return QualType(this, 0); } 2305 2306 static bool classof(const Type *T) { 2307 return T->getTypeClass() == DependentSizedArray; 2308 } 2309 static bool classof(const DependentSizedArrayType *) { return true; } 2310 2311 friend class StmtIteratorBase; 2312 2313 2314 void Profile(llvm::FoldingSetNodeID &ID) { 2315 Profile(ID, Context, getElementType(), 2316 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 2317 } 2318 2319 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2320 QualType ET, ArraySizeModifier SizeMod, 2321 unsigned TypeQuals, Expr *E); 2322}; 2323 2324/// DependentSizedExtVectorType - This type represent an extended vector type 2325/// where either the type or size is dependent. For example: 2326/// @code 2327/// template<typename T, int Size> 2328/// class vector { 2329/// typedef T __attribute__((ext_vector_type(Size))) type; 2330/// } 2331/// @endcode 2332class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 2333 const ASTContext &Context; 2334 Expr *SizeExpr; 2335 /// ElementType - The element type of the array. 2336 QualType ElementType; 2337 SourceLocation loc; 2338 2339 DependentSizedExtVectorType(const ASTContext &Context, QualType ElementType, 2340 QualType can, Expr *SizeExpr, SourceLocation loc); 2341 2342 friend class ASTContext; 2343 2344public: 2345 Expr *getSizeExpr() const { return SizeExpr; } 2346 QualType getElementType() const { return ElementType; } 2347 SourceLocation getAttributeLoc() const { return loc; } 2348 2349 bool isSugared() const { return false; } 2350 QualType desugar() const { return QualType(this, 0); } 2351 2352 static bool classof(const Type *T) { 2353 return T->getTypeClass() == DependentSizedExtVector; 2354 } 2355 static bool classof(const DependentSizedExtVectorType *) { return true; } 2356 2357 void Profile(llvm::FoldingSetNodeID &ID) { 2358 Profile(ID, Context, getElementType(), getSizeExpr()); 2359 } 2360 2361 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2362 QualType ElementType, Expr *SizeExpr); 2363}; 2364 2365 2366/// VectorType - GCC generic vector type. This type is created using 2367/// __attribute__((vector_size(n)), where "n" specifies the vector size in 2368/// bytes; or from an Altivec __vector or vector declaration. 2369/// Since the constructor takes the number of vector elements, the 2370/// client is responsible for converting the size into the number of elements. 2371class VectorType : public Type, public llvm::FoldingSetNode { 2372public: 2373 enum VectorKind { 2374 GenericVector, // not a target-specific vector type 2375 AltiVecVector, // is AltiVec vector 2376 AltiVecPixel, // is AltiVec 'vector Pixel' 2377 AltiVecBool, // is AltiVec 'vector bool ...' 2378 NeonVector, // is ARM Neon vector 2379 NeonPolyVector // is ARM Neon polynomial vector 2380 }; 2381protected: 2382 /// ElementType - The element type of the vector. 2383 QualType ElementType; 2384 2385 VectorType(QualType vecType, unsigned nElements, QualType canonType, 2386 VectorKind vecKind); 2387 2388 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 2389 QualType canonType, VectorKind vecKind); 2390 2391 friend class ASTContext; // ASTContext creates these. 2392 2393public: 2394 2395 QualType getElementType() const { return ElementType; } 2396 unsigned getNumElements() const { return VectorTypeBits.NumElements; } 2397 2398 bool isSugared() const { return false; } 2399 QualType desugar() const { return QualType(this, 0); } 2400 2401 VectorKind getVectorKind() const { 2402 return VectorKind(VectorTypeBits.VecKind); 2403 } 2404 2405 void Profile(llvm::FoldingSetNodeID &ID) { 2406 Profile(ID, getElementType(), getNumElements(), 2407 getTypeClass(), getVectorKind()); 2408 } 2409 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 2410 unsigned NumElements, TypeClass TypeClass, 2411 VectorKind VecKind) { 2412 ID.AddPointer(ElementType.getAsOpaquePtr()); 2413 ID.AddInteger(NumElements); 2414 ID.AddInteger(TypeClass); 2415 ID.AddInteger(VecKind); 2416 } 2417 2418 static bool classof(const Type *T) { 2419 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 2420 } 2421 static bool classof(const VectorType *) { return true; } 2422}; 2423 2424/// ExtVectorType - Extended vector type. This type is created using 2425/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 2426/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 2427/// class enables syntactic extensions, like Vector Components for accessing 2428/// points, colors, and textures (modeled after OpenGL Shading Language). 2429class ExtVectorType : public VectorType { 2430 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 2431 VectorType(ExtVector, vecType, nElements, canonType, GenericVector) {} 2432 friend class ASTContext; // ASTContext creates these. 2433public: 2434 static int getPointAccessorIdx(char c) { 2435 switch (c) { 2436 default: return -1; 2437 case 'x': return 0; 2438 case 'y': return 1; 2439 case 'z': return 2; 2440 case 'w': return 3; 2441 } 2442 } 2443 static int getNumericAccessorIdx(char c) { 2444 switch (c) { 2445 default: return -1; 2446 case '0': return 0; 2447 case '1': return 1; 2448 case '2': return 2; 2449 case '3': return 3; 2450 case '4': return 4; 2451 case '5': return 5; 2452 case '6': return 6; 2453 case '7': return 7; 2454 case '8': return 8; 2455 case '9': return 9; 2456 case 'A': 2457 case 'a': return 10; 2458 case 'B': 2459 case 'b': return 11; 2460 case 'C': 2461 case 'c': return 12; 2462 case 'D': 2463 case 'd': return 13; 2464 case 'E': 2465 case 'e': return 14; 2466 case 'F': 2467 case 'f': return 15; 2468 } 2469 } 2470 2471 static int getAccessorIdx(char c) { 2472 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 2473 return getNumericAccessorIdx(c); 2474 } 2475 2476 bool isAccessorWithinNumElements(char c) const { 2477 if (int idx = getAccessorIdx(c)+1) 2478 return unsigned(idx-1) < getNumElements(); 2479 return false; 2480 } 2481 bool isSugared() const { return false; } 2482 QualType desugar() const { return QualType(this, 0); } 2483 2484 static bool classof(const Type *T) { 2485 return T->getTypeClass() == ExtVector; 2486 } 2487 static bool classof(const ExtVectorType *) { return true; } 2488}; 2489 2490/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 2491/// class of FunctionNoProtoType and FunctionProtoType. 2492/// 2493class FunctionType : public Type { 2494 // The type returned by the function. 2495 QualType ResultType; 2496 2497 public: 2498 /// ExtInfo - A class which abstracts out some details necessary for 2499 /// making a call. 2500 /// 2501 /// It is not actually used directly for storing this information in 2502 /// a FunctionType, although FunctionType does currently use the 2503 /// same bit-pattern. 2504 /// 2505 // If you add a field (say Foo), other than the obvious places (both, 2506 // constructors, compile failures), what you need to update is 2507 // * Operator== 2508 // * getFoo 2509 // * withFoo 2510 // * functionType. Add Foo, getFoo. 2511 // * ASTContext::getFooType 2512 // * ASTContext::mergeFunctionTypes 2513 // * FunctionNoProtoType::Profile 2514 // * FunctionProtoType::Profile 2515 // * TypePrinter::PrintFunctionProto 2516 // * AST read and write 2517 // * Codegen 2518 class ExtInfo { 2519 // Feel free to rearrange or add bits, but if you go over 8, 2520 // you'll need to adjust both the Bits field below and 2521 // Type::FunctionTypeBitfields. 2522 2523 // | CC |noreturn|produces|regparm| 2524 // |0 .. 2| 3 | 4 | 5 .. 7| 2525 // 2526 // regparm is either 0 (no regparm attribute) or the regparm value+1. 2527 enum { CallConvMask = 0x7 }; 2528 enum { NoReturnMask = 0x8 }; 2529 enum { ProducesResultMask = 0x10 }; 2530 enum { RegParmMask = ~(CallConvMask | NoReturnMask | ProducesResultMask), 2531 RegParmOffset = 5 }; // Assumed to be the last field 2532 2533 uint16_t Bits; 2534 2535 ExtInfo(unsigned Bits) : Bits(static_cast<uint16_t>(Bits)) {} 2536 2537 friend class FunctionType; 2538 2539 public: 2540 // Constructor with no defaults. Use this when you know that you 2541 // have all the elements (when reading an AST file for example). 2542 ExtInfo(bool noReturn, bool hasRegParm, unsigned regParm, CallingConv cc, 2543 bool producesResult) { 2544 assert((!hasRegParm || regParm < 7) && "Invalid regparm value"); 2545 Bits = ((unsigned) cc) | 2546 (noReturn ? NoReturnMask : 0) | 2547 (producesResult ? ProducesResultMask : 0) | 2548 (hasRegParm ? ((regParm + 1) << RegParmOffset) : 0); 2549 } 2550 2551 // Constructor with all defaults. Use when for example creating a 2552 // function know to use defaults. 2553 ExtInfo() : Bits(0) {} 2554 2555 bool getNoReturn() const { return Bits & NoReturnMask; } 2556 bool getProducesResult() const { return Bits & ProducesResultMask; } 2557 bool getHasRegParm() const { return (Bits >> RegParmOffset) != 0; } 2558 unsigned getRegParm() const { 2559 unsigned RegParm = Bits >> RegParmOffset; 2560 if (RegParm > 0) 2561 --RegParm; 2562 return RegParm; 2563 } 2564 CallingConv getCC() const { return CallingConv(Bits & CallConvMask); } 2565 2566 bool operator==(ExtInfo Other) const { 2567 return Bits == Other.Bits; 2568 } 2569 bool operator!=(ExtInfo Other) const { 2570 return Bits != Other.Bits; 2571 } 2572 2573 // Note that we don't have setters. That is by design, use 2574 // the following with methods instead of mutating these objects. 2575 2576 ExtInfo withNoReturn(bool noReturn) const { 2577 if (noReturn) 2578 return ExtInfo(Bits | NoReturnMask); 2579 else 2580 return ExtInfo(Bits & ~NoReturnMask); 2581 } 2582 2583 ExtInfo withProducesResult(bool producesResult) const { 2584 if (producesResult) 2585 return ExtInfo(Bits | ProducesResultMask); 2586 else 2587 return ExtInfo(Bits & ~ProducesResultMask); 2588 } 2589 2590 ExtInfo withRegParm(unsigned RegParm) const { 2591 assert(RegParm < 7 && "Invalid regparm value"); 2592 return ExtInfo((Bits & ~RegParmMask) | 2593 ((RegParm + 1) << RegParmOffset)); 2594 } 2595 2596 ExtInfo withCallingConv(CallingConv cc) const { 2597 return ExtInfo((Bits & ~CallConvMask) | (unsigned) cc); 2598 } 2599 2600 void Profile(llvm::FoldingSetNodeID &ID) const { 2601 ID.AddInteger(Bits); 2602 } 2603 }; 2604 2605protected: 2606 FunctionType(TypeClass tc, QualType res, bool variadic, 2607 unsigned typeQuals, RefQualifierKind RefQualifier, 2608 QualType Canonical, bool Dependent, 2609 bool InstantiationDependent, 2610 bool VariablyModified, bool ContainsUnexpandedParameterPack, 2611 ExtInfo Info) 2612 : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified, 2613 ContainsUnexpandedParameterPack), 2614 ResultType(res) { 2615 FunctionTypeBits.ExtInfo = Info.Bits; 2616 FunctionTypeBits.Variadic = variadic; 2617 FunctionTypeBits.TypeQuals = typeQuals; 2618 FunctionTypeBits.RefQualifier = static_cast<unsigned>(RefQualifier); 2619 } 2620 bool isVariadic() const { return FunctionTypeBits.Variadic; } 2621 unsigned getTypeQuals() const { return FunctionTypeBits.TypeQuals; } 2622 2623 RefQualifierKind getRefQualifier() const { 2624 return static_cast<RefQualifierKind>(FunctionTypeBits.RefQualifier); 2625 } 2626 2627public: 2628 2629 QualType getResultType() const { return ResultType; } 2630 2631 bool getHasRegParm() const { return getExtInfo().getHasRegParm(); } 2632 unsigned getRegParmType() const { return getExtInfo().getRegParm(); } 2633 bool getNoReturnAttr() const { return getExtInfo().getNoReturn(); } 2634 CallingConv getCallConv() const { return getExtInfo().getCC(); } 2635 ExtInfo getExtInfo() const { return ExtInfo(FunctionTypeBits.ExtInfo); } 2636 2637 /// \brief Determine the type of an expression that calls a function of 2638 /// this type. 2639 QualType getCallResultType(ASTContext &Context) const { 2640 return getResultType().getNonLValueExprType(Context); 2641 } 2642 2643 static StringRef getNameForCallConv(CallingConv CC); 2644 2645 static bool classof(const Type *T) { 2646 return T->getTypeClass() == FunctionNoProto || 2647 T->getTypeClass() == FunctionProto; 2648 } 2649 static bool classof(const FunctionType *) { return true; } 2650}; 2651 2652/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 2653/// no information available about its arguments. 2654class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 2655 FunctionNoProtoType(QualType Result, QualType Canonical, ExtInfo Info) 2656 : FunctionType(FunctionNoProto, Result, false, 0, RQ_None, Canonical, 2657 /*Dependent=*/false, /*InstantiationDependent=*/false, 2658 Result->isVariablyModifiedType(), 2659 /*ContainsUnexpandedParameterPack=*/false, Info) {} 2660 2661 friend class ASTContext; // ASTContext creates these. 2662 2663public: 2664 // No additional state past what FunctionType provides. 2665 2666 bool isSugared() const { return false; } 2667 QualType desugar() const { return QualType(this, 0); } 2668 2669 void Profile(llvm::FoldingSetNodeID &ID) { 2670 Profile(ID, getResultType(), getExtInfo()); 2671 } 2672 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 2673 ExtInfo Info) { 2674 Info.Profile(ID); 2675 ID.AddPointer(ResultType.getAsOpaquePtr()); 2676 } 2677 2678 static bool classof(const Type *T) { 2679 return T->getTypeClass() == FunctionNoProto; 2680 } 2681 static bool classof(const FunctionNoProtoType *) { return true; } 2682}; 2683 2684/// FunctionProtoType - Represents a prototype with argument type info, e.g. 2685/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 2686/// arguments, not as having a single void argument. Such a type can have an 2687/// exception specification, but this specification is not part of the canonical 2688/// type. 2689class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 2690public: 2691 /// ExtProtoInfo - Extra information about a function prototype. 2692 struct ExtProtoInfo { 2693 ExtProtoInfo() : 2694 Variadic(false), ExceptionSpecType(EST_None), TypeQuals(0), 2695 RefQualifier(RQ_None), NumExceptions(0), Exceptions(0), NoexceptExpr(0), 2696 ConsumedArguments(0) {} 2697 2698 FunctionType::ExtInfo ExtInfo; 2699 bool Variadic; 2700 ExceptionSpecificationType ExceptionSpecType; 2701 unsigned char TypeQuals; 2702 RefQualifierKind RefQualifier; 2703 unsigned NumExceptions; 2704 const QualType *Exceptions; 2705 Expr *NoexceptExpr; 2706 const bool *ConsumedArguments; 2707 }; 2708 2709private: 2710 /// \brief Determine whether there are any argument types that 2711 /// contain an unexpanded parameter pack. 2712 static bool containsAnyUnexpandedParameterPack(const QualType *ArgArray, 2713 unsigned numArgs) { 2714 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 2715 if (ArgArray[Idx]->containsUnexpandedParameterPack()) 2716 return true; 2717 2718 return false; 2719 } 2720 2721 FunctionProtoType(QualType result, const QualType *args, unsigned numArgs, 2722 QualType canonical, const ExtProtoInfo &epi); 2723 2724 /// NumArgs - The number of arguments this function has, not counting '...'. 2725 unsigned NumArgs : 19; 2726 2727 /// NumExceptions - The number of types in the exception spec, if any. 2728 unsigned NumExceptions : 9; 2729 2730 /// ExceptionSpecType - The type of exception specification this function has. 2731 unsigned ExceptionSpecType : 3; 2732 2733 /// HasAnyConsumedArgs - Whether this function has any consumed arguments. 2734 unsigned HasAnyConsumedArgs : 1; 2735 2736 /// ArgInfo - There is an variable size array after the class in memory that 2737 /// holds the argument types. 2738 2739 /// Exceptions - There is another variable size array after ArgInfo that 2740 /// holds the exception types. 2741 2742 /// NoexceptExpr - Instead of Exceptions, there may be a single Expr* pointing 2743 /// to the expression in the noexcept() specifier. 2744 2745 /// ConsumedArgs - A variable size array, following Exceptions 2746 /// and of length NumArgs, holding flags indicating which arguments 2747 /// are consumed. This only appears if HasAnyConsumedArgs is true. 2748 2749 friend class ASTContext; // ASTContext creates these. 2750 2751 const bool *getConsumedArgsBuffer() const { 2752 assert(hasAnyConsumedArgs()); 2753 2754 // Find the end of the exceptions. 2755 Expr * const *eh_end = reinterpret_cast<Expr * const *>(arg_type_end()); 2756 if (getExceptionSpecType() != EST_ComputedNoexcept) 2757 eh_end += NumExceptions; 2758 else 2759 eh_end += 1; // NoexceptExpr 2760 2761 return reinterpret_cast<const bool*>(eh_end); 2762 } 2763 2764public: 2765 unsigned getNumArgs() const { return NumArgs; } 2766 QualType getArgType(unsigned i) const { 2767 assert(i < NumArgs && "Invalid argument number!"); 2768 return arg_type_begin()[i]; 2769 } 2770 2771 ExtProtoInfo getExtProtoInfo() const { 2772 ExtProtoInfo EPI; 2773 EPI.ExtInfo = getExtInfo(); 2774 EPI.Variadic = isVariadic(); 2775 EPI.ExceptionSpecType = getExceptionSpecType(); 2776 EPI.TypeQuals = static_cast<unsigned char>(getTypeQuals()); 2777 EPI.RefQualifier = getRefQualifier(); 2778 if (EPI.ExceptionSpecType == EST_Dynamic) { 2779 EPI.NumExceptions = NumExceptions; 2780 EPI.Exceptions = exception_begin(); 2781 } else if (EPI.ExceptionSpecType == EST_ComputedNoexcept) { 2782 EPI.NoexceptExpr = getNoexceptExpr(); 2783 } 2784 if (hasAnyConsumedArgs()) 2785 EPI.ConsumedArguments = getConsumedArgsBuffer(); 2786 return EPI; 2787 } 2788 2789 /// \brief Get the kind of exception specification on this function. 2790 ExceptionSpecificationType getExceptionSpecType() const { 2791 return static_cast<ExceptionSpecificationType>(ExceptionSpecType); 2792 } 2793 /// \brief Return whether this function has any kind of exception spec. 2794 bool hasExceptionSpec() const { 2795 return getExceptionSpecType() != EST_None; 2796 } 2797 /// \brief Return whether this function has a dynamic (throw) exception spec. 2798 bool hasDynamicExceptionSpec() const { 2799 return isDynamicExceptionSpec(getExceptionSpecType()); 2800 } 2801 /// \brief Return whether this function has a noexcept exception spec. 2802 bool hasNoexceptExceptionSpec() const { 2803 return isNoexceptExceptionSpec(getExceptionSpecType()); 2804 } 2805 /// \brief Result type of getNoexceptSpec(). 2806 enum NoexceptResult { 2807 NR_NoNoexcept, ///< There is no noexcept specifier. 2808 NR_BadNoexcept, ///< The noexcept specifier has a bad expression. 2809 NR_Dependent, ///< The noexcept specifier is dependent. 2810 NR_Throw, ///< The noexcept specifier evaluates to false. 2811 NR_Nothrow ///< The noexcept specifier evaluates to true. 2812 }; 2813 /// \brief Get the meaning of the noexcept spec on this function, if any. 2814 NoexceptResult getNoexceptSpec(ASTContext &Ctx) const; 2815 unsigned getNumExceptions() const { return NumExceptions; } 2816 QualType getExceptionType(unsigned i) const { 2817 assert(i < NumExceptions && "Invalid exception number!"); 2818 return exception_begin()[i]; 2819 } 2820 Expr *getNoexceptExpr() const { 2821 if (getExceptionSpecType() != EST_ComputedNoexcept) 2822 return 0; 2823 // NoexceptExpr sits where the arguments end. 2824 return *reinterpret_cast<Expr *const *>(arg_type_end()); 2825 } 2826 bool isNothrow(ASTContext &Ctx) const { 2827 ExceptionSpecificationType EST = getExceptionSpecType(); 2828 assert(EST != EST_Delayed); 2829 if (EST == EST_DynamicNone || EST == EST_BasicNoexcept) 2830 return true; 2831 if (EST != EST_ComputedNoexcept) 2832 return false; 2833 return getNoexceptSpec(Ctx) == NR_Nothrow; 2834 } 2835 2836 using FunctionType::isVariadic; 2837 2838 /// \brief Determines whether this function prototype contains a 2839 /// parameter pack at the end. 2840 /// 2841 /// A function template whose last parameter is a parameter pack can be 2842 /// called with an arbitrary number of arguments, much like a variadic 2843 /// function. However, 2844 bool isTemplateVariadic() const; 2845 2846 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 2847 2848 2849 /// \brief Retrieve the ref-qualifier associated with this function type. 2850 RefQualifierKind getRefQualifier() const { 2851 return FunctionType::getRefQualifier(); 2852 } 2853 2854 typedef const QualType *arg_type_iterator; 2855 arg_type_iterator arg_type_begin() const { 2856 return reinterpret_cast<const QualType *>(this+1); 2857 } 2858 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 2859 2860 typedef const QualType *exception_iterator; 2861 exception_iterator exception_begin() const { 2862 // exceptions begin where arguments end 2863 return arg_type_end(); 2864 } 2865 exception_iterator exception_end() const { 2866 if (getExceptionSpecType() != EST_Dynamic) 2867 return exception_begin(); 2868 return exception_begin() + NumExceptions; 2869 } 2870 2871 bool hasAnyConsumedArgs() const { 2872 return HasAnyConsumedArgs; 2873 } 2874 bool isArgConsumed(unsigned I) const { 2875 assert(I < getNumArgs() && "argument index out of range!"); 2876 if (hasAnyConsumedArgs()) 2877 return getConsumedArgsBuffer()[I]; 2878 return false; 2879 } 2880 2881 bool isSugared() const { return false; } 2882 QualType desugar() const { return QualType(this, 0); } 2883 2884 static bool classof(const Type *T) { 2885 return T->getTypeClass() == FunctionProto; 2886 } 2887 static bool classof(const FunctionProtoType *) { return true; } 2888 2889 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx); 2890 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 2891 arg_type_iterator ArgTys, unsigned NumArgs, 2892 const ExtProtoInfo &EPI, const ASTContext &Context); 2893}; 2894 2895 2896/// \brief Represents the dependent type named by a dependently-scoped 2897/// typename using declaration, e.g. 2898/// using typename Base<T>::foo; 2899/// Template instantiation turns these into the underlying type. 2900class UnresolvedUsingType : public Type { 2901 UnresolvedUsingTypenameDecl *Decl; 2902 2903 UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) 2904 : Type(UnresolvedUsing, QualType(), true, true, false, 2905 /*ContainsUnexpandedParameterPack=*/false), 2906 Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} 2907 friend class ASTContext; // ASTContext creates these. 2908public: 2909 2910 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 2911 2912 bool isSugared() const { return false; } 2913 QualType desugar() const { return QualType(this, 0); } 2914 2915 static bool classof(const Type *T) { 2916 return T->getTypeClass() == UnresolvedUsing; 2917 } 2918 static bool classof(const UnresolvedUsingType *) { return true; } 2919 2920 void Profile(llvm::FoldingSetNodeID &ID) { 2921 return Profile(ID, Decl); 2922 } 2923 static void Profile(llvm::FoldingSetNodeID &ID, 2924 UnresolvedUsingTypenameDecl *D) { 2925 ID.AddPointer(D); 2926 } 2927}; 2928 2929 2930class TypedefType : public Type { 2931 TypedefNameDecl *Decl; 2932protected: 2933 TypedefType(TypeClass tc, const TypedefNameDecl *D, QualType can) 2934 : Type(tc, can, can->isDependentType(), 2935 can->isInstantiationDependentType(), 2936 can->isVariablyModifiedType(), 2937 /*ContainsUnexpandedParameterPack=*/false), 2938 Decl(const_cast<TypedefNameDecl*>(D)) { 2939 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2940 } 2941 friend class ASTContext; // ASTContext creates these. 2942public: 2943 2944 TypedefNameDecl *getDecl() const { return Decl; } 2945 2946 bool isSugared() const { return true; } 2947 QualType desugar() const; 2948 2949 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 2950 static bool classof(const TypedefType *) { return true; } 2951}; 2952 2953/// TypeOfExprType (GCC extension). 2954class TypeOfExprType : public Type { 2955 Expr *TOExpr; 2956 2957protected: 2958 TypeOfExprType(Expr *E, QualType can = QualType()); 2959 friend class ASTContext; // ASTContext creates these. 2960public: 2961 Expr *getUnderlyingExpr() const { return TOExpr; } 2962 2963 /// \brief Remove a single level of sugar. 2964 QualType desugar() const; 2965 2966 /// \brief Returns whether this type directly provides sugar. 2967 bool isSugared() const; 2968 2969 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 2970 static bool classof(const TypeOfExprType *) { return true; } 2971}; 2972 2973/// \brief Internal representation of canonical, dependent 2974/// typeof(expr) types. 2975/// 2976/// This class is used internally by the ASTContext to manage 2977/// canonical, dependent types, only. Clients will only see instances 2978/// of this class via TypeOfExprType nodes. 2979class DependentTypeOfExprType 2980 : public TypeOfExprType, public llvm::FoldingSetNode { 2981 const ASTContext &Context; 2982 2983public: 2984 DependentTypeOfExprType(const ASTContext &Context, Expr *E) 2985 : TypeOfExprType(E), Context(Context) { } 2986 2987 void Profile(llvm::FoldingSetNodeID &ID) { 2988 Profile(ID, Context, getUnderlyingExpr()); 2989 } 2990 2991 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2992 Expr *E); 2993}; 2994 2995/// TypeOfType (GCC extension). 2996class TypeOfType : public Type { 2997 QualType TOType; 2998 TypeOfType(QualType T, QualType can) 2999 : Type(TypeOf, can, T->isDependentType(), 3000 T->isInstantiationDependentType(), 3001 T->isVariablyModifiedType(), 3002 T->containsUnexpandedParameterPack()), 3003 TOType(T) { 3004 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 3005 } 3006 friend class ASTContext; // ASTContext creates these. 3007public: 3008 QualType getUnderlyingType() const { return TOType; } 3009 3010 /// \brief Remove a single level of sugar. 3011 QualType desugar() const { return getUnderlyingType(); } 3012 3013 /// \brief Returns whether this type directly provides sugar. 3014 bool isSugared() const { return true; } 3015 3016 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 3017 static bool classof(const TypeOfType *) { return true; } 3018}; 3019 3020/// DecltypeType (C++0x) 3021class DecltypeType : public Type { 3022 Expr *E; 3023 3024 // FIXME: We could get rid of UnderlyingType if we wanted to: We would have to 3025 // Move getDesugaredType to ASTContext so that it can call getDecltypeForExpr 3026 // from it. 3027 QualType UnderlyingType; 3028 3029protected: 3030 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 3031 friend class ASTContext; // ASTContext creates these. 3032public: 3033 Expr *getUnderlyingExpr() const { return E; } 3034 QualType getUnderlyingType() const { return UnderlyingType; } 3035 3036 /// \brief Remove a single level of sugar. 3037 QualType desugar() const; 3038 3039 /// \brief Returns whether this type directly provides sugar. 3040 bool isSugared() const; 3041 3042 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 3043 static bool classof(const DecltypeType *) { return true; } 3044}; 3045 3046/// \brief Internal representation of canonical, dependent 3047/// decltype(expr) types. 3048/// 3049/// This class is used internally by the ASTContext to manage 3050/// canonical, dependent types, only. Clients will only see instances 3051/// of this class via DecltypeType nodes. 3052class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 3053 const ASTContext &Context; 3054 3055public: 3056 DependentDecltypeType(const ASTContext &Context, Expr *E); 3057 3058 void Profile(llvm::FoldingSetNodeID &ID) { 3059 Profile(ID, Context, getUnderlyingExpr()); 3060 } 3061 3062 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 3063 Expr *E); 3064}; 3065 3066/// \brief A unary type transform, which is a type constructed from another 3067class UnaryTransformType : public Type { 3068public: 3069 enum UTTKind { 3070 EnumUnderlyingType 3071 }; 3072 3073private: 3074 /// The untransformed type. 3075 QualType BaseType; 3076 /// The transformed type if not dependent, otherwise the same as BaseType. 3077 QualType UnderlyingType; 3078 3079 UTTKind UKind; 3080protected: 3081 UnaryTransformType(QualType BaseTy, QualType UnderlyingTy, UTTKind UKind, 3082 QualType CanonicalTy); 3083 friend class ASTContext; 3084public: 3085 bool isSugared() const { return !isDependentType(); } 3086 QualType desugar() const { return UnderlyingType; } 3087 3088 QualType getUnderlyingType() const { return UnderlyingType; } 3089 QualType getBaseType() const { return BaseType; } 3090 3091 UTTKind getUTTKind() const { return UKind; } 3092 3093 static bool classof(const Type *T) { 3094 return T->getTypeClass() == UnaryTransform; 3095 } 3096 static bool classof(const UnaryTransformType *) { return true; } 3097}; 3098 3099class TagType : public Type { 3100 /// Stores the TagDecl associated with this type. The decl may point to any 3101 /// TagDecl that declares the entity. 3102 TagDecl * decl; 3103 3104protected: 3105 TagType(TypeClass TC, const TagDecl *D, QualType can); 3106 3107public: 3108 TagDecl *getDecl() const; 3109 3110 /// @brief Determines whether this type is in the process of being 3111 /// defined. 3112 bool isBeingDefined() const; 3113 3114 static bool classof(const Type *T) { 3115 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 3116 } 3117 static bool classof(const TagType *) { return true; } 3118 static bool classof(const RecordType *) { return true; } 3119 static bool classof(const EnumType *) { return true; } 3120}; 3121 3122/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 3123/// to detect TagType objects of structs/unions/classes. 3124class RecordType : public TagType { 3125protected: 3126 explicit RecordType(const RecordDecl *D) 3127 : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3128 explicit RecordType(TypeClass TC, RecordDecl *D) 3129 : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3130 friend class ASTContext; // ASTContext creates these. 3131public: 3132 3133 RecordDecl *getDecl() const { 3134 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 3135 } 3136 3137 // FIXME: This predicate is a helper to QualType/Type. It needs to 3138 // recursively check all fields for const-ness. If any field is declared 3139 // const, it needs to return false. 3140 bool hasConstFields() const { return false; } 3141 3142 bool isSugared() const { return false; } 3143 QualType desugar() const { return QualType(this, 0); } 3144 3145 static bool classof(const TagType *T); 3146 static bool classof(const Type *T) { 3147 return isa<TagType>(T) && classof(cast<TagType>(T)); 3148 } 3149 static bool classof(const RecordType *) { return true; } 3150}; 3151 3152/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 3153/// to detect TagType objects of enums. 3154class EnumType : public TagType { 3155 explicit EnumType(const EnumDecl *D) 3156 : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3157 friend class ASTContext; // ASTContext creates these. 3158public: 3159 3160 EnumDecl *getDecl() const { 3161 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 3162 } 3163 3164 bool isSugared() const { return false; } 3165 QualType desugar() const { return QualType(this, 0); } 3166 3167 static bool classof(const TagType *T); 3168 static bool classof(const Type *T) { 3169 return isa<TagType>(T) && classof(cast<TagType>(T)); 3170 } 3171 static bool classof(const EnumType *) { return true; } 3172}; 3173 3174/// AttributedType - An attributed type is a type to which a type 3175/// attribute has been applied. The "modified type" is the 3176/// fully-sugared type to which the attributed type was applied; 3177/// generally it is not canonically equivalent to the attributed type. 3178/// The "equivalent type" is the minimally-desugared type which the 3179/// type is canonically equivalent to. 3180/// 3181/// For example, in the following attributed type: 3182/// int32_t __attribute__((vector_size(16))) 3183/// - the modified type is the TypedefType for int32_t 3184/// - the equivalent type is VectorType(16, int32_t) 3185/// - the canonical type is VectorType(16, int) 3186class AttributedType : public Type, public llvm::FoldingSetNode { 3187public: 3188 // It is really silly to have yet another attribute-kind enum, but 3189 // clang::attr::Kind doesn't currently cover the pure type attrs. 3190 enum Kind { 3191 // Expression operand. 3192 attr_address_space, 3193 attr_regparm, 3194 attr_vector_size, 3195 attr_neon_vector_type, 3196 attr_neon_polyvector_type, 3197 3198 FirstExprOperandKind = attr_address_space, 3199 LastExprOperandKind = attr_neon_polyvector_type, 3200 3201 // Enumerated operand (string or keyword). 3202 attr_objc_gc, 3203 attr_objc_ownership, 3204 attr_pcs, 3205 3206 FirstEnumOperandKind = attr_objc_gc, 3207 LastEnumOperandKind = attr_pcs, 3208 3209 // No operand. 3210 attr_noreturn, 3211 attr_cdecl, 3212 attr_fastcall, 3213 attr_stdcall, 3214 attr_thiscall, 3215 attr_pascal 3216 }; 3217 3218private: 3219 QualType ModifiedType; 3220 QualType EquivalentType; 3221 3222 friend class ASTContext; // creates these 3223 3224 AttributedType(QualType canon, Kind attrKind, 3225 QualType modified, QualType equivalent) 3226 : Type(Attributed, canon, canon->isDependentType(), 3227 canon->isInstantiationDependentType(), 3228 canon->isVariablyModifiedType(), 3229 canon->containsUnexpandedParameterPack()), 3230 ModifiedType(modified), EquivalentType(equivalent) { 3231 AttributedTypeBits.AttrKind = attrKind; 3232 } 3233 3234public: 3235 Kind getAttrKind() const { 3236 return static_cast<Kind>(AttributedTypeBits.AttrKind); 3237 } 3238 3239 QualType getModifiedType() const { return ModifiedType; } 3240 QualType getEquivalentType() const { return EquivalentType; } 3241 3242 bool isSugared() const { return true; } 3243 QualType desugar() const { return getEquivalentType(); } 3244 3245 void Profile(llvm::FoldingSetNodeID &ID) { 3246 Profile(ID, getAttrKind(), ModifiedType, EquivalentType); 3247 } 3248 3249 static void Profile(llvm::FoldingSetNodeID &ID, Kind attrKind, 3250 QualType modified, QualType equivalent) { 3251 ID.AddInteger(attrKind); 3252 ID.AddPointer(modified.getAsOpaquePtr()); 3253 ID.AddPointer(equivalent.getAsOpaquePtr()); 3254 } 3255 3256 static bool classof(const Type *T) { 3257 return T->getTypeClass() == Attributed; 3258 } 3259 static bool classof(const AttributedType *T) { return true; } 3260}; 3261 3262class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 3263 // Helper data collector for canonical types. 3264 struct CanonicalTTPTInfo { 3265 unsigned Depth : 15; 3266 unsigned ParameterPack : 1; 3267 unsigned Index : 16; 3268 }; 3269 3270 union { 3271 // Info for the canonical type. 3272 CanonicalTTPTInfo CanTTPTInfo; 3273 // Info for the non-canonical type. 3274 TemplateTypeParmDecl *TTPDecl; 3275 }; 3276 3277 /// Build a non-canonical type. 3278 TemplateTypeParmType(TemplateTypeParmDecl *TTPDecl, QualType Canon) 3279 : Type(TemplateTypeParm, Canon, /*Dependent=*/true, 3280 /*InstantiationDependent=*/true, 3281 /*VariablyModified=*/false, 3282 Canon->containsUnexpandedParameterPack()), 3283 TTPDecl(TTPDecl) { } 3284 3285 /// Build the canonical type. 3286 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 3287 : Type(TemplateTypeParm, QualType(this, 0), 3288 /*Dependent=*/true, 3289 /*InstantiationDependent=*/true, 3290 /*VariablyModified=*/false, PP) { 3291 CanTTPTInfo.Depth = D; 3292 CanTTPTInfo.Index = I; 3293 CanTTPTInfo.ParameterPack = PP; 3294 } 3295 3296 friend class ASTContext; // ASTContext creates these 3297 3298 const CanonicalTTPTInfo& getCanTTPTInfo() const { 3299 QualType Can = getCanonicalTypeInternal(); 3300 return Can->castAs<TemplateTypeParmType>()->CanTTPTInfo; 3301 } 3302 3303public: 3304 unsigned getDepth() const { return getCanTTPTInfo().Depth; } 3305 unsigned getIndex() const { return getCanTTPTInfo().Index; } 3306 bool isParameterPack() const { return getCanTTPTInfo().ParameterPack; } 3307 3308 TemplateTypeParmDecl *getDecl() const { 3309 return isCanonicalUnqualified() ? 0 : TTPDecl; 3310 } 3311 3312 IdentifierInfo *getIdentifier() const; 3313 3314 bool isSugared() const { return false; } 3315 QualType desugar() const { return QualType(this, 0); } 3316 3317 void Profile(llvm::FoldingSetNodeID &ID) { 3318 Profile(ID, getDepth(), getIndex(), isParameterPack(), getDecl()); 3319 } 3320 3321 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 3322 unsigned Index, bool ParameterPack, 3323 TemplateTypeParmDecl *TTPDecl) { 3324 ID.AddInteger(Depth); 3325 ID.AddInteger(Index); 3326 ID.AddBoolean(ParameterPack); 3327 ID.AddPointer(TTPDecl); 3328 } 3329 3330 static bool classof(const Type *T) { 3331 return T->getTypeClass() == TemplateTypeParm; 3332 } 3333 static bool classof(const TemplateTypeParmType *T) { return true; } 3334}; 3335 3336/// \brief Represents the result of substituting a type for a template 3337/// type parameter. 3338/// 3339/// Within an instantiated template, all template type parameters have 3340/// been replaced with these. They are used solely to record that a 3341/// type was originally written as a template type parameter; 3342/// therefore they are never canonical. 3343class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 3344 // The original type parameter. 3345 const TemplateTypeParmType *Replaced; 3346 3347 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 3348 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType(), 3349 Canon->isInstantiationDependentType(), 3350 Canon->isVariablyModifiedType(), 3351 Canon->containsUnexpandedParameterPack()), 3352 Replaced(Param) { } 3353 3354 friend class ASTContext; 3355 3356public: 3357 /// Gets the template parameter that was substituted for. 3358 const TemplateTypeParmType *getReplacedParameter() const { 3359 return Replaced; 3360 } 3361 3362 /// Gets the type that was substituted for the template 3363 /// parameter. 3364 QualType getReplacementType() const { 3365 return getCanonicalTypeInternal(); 3366 } 3367 3368 bool isSugared() const { return true; } 3369 QualType desugar() const { return getReplacementType(); } 3370 3371 void Profile(llvm::FoldingSetNodeID &ID) { 3372 Profile(ID, getReplacedParameter(), getReplacementType()); 3373 } 3374 static void Profile(llvm::FoldingSetNodeID &ID, 3375 const TemplateTypeParmType *Replaced, 3376 QualType Replacement) { 3377 ID.AddPointer(Replaced); 3378 ID.AddPointer(Replacement.getAsOpaquePtr()); 3379 } 3380 3381 static bool classof(const Type *T) { 3382 return T->getTypeClass() == SubstTemplateTypeParm; 3383 } 3384 static bool classof(const SubstTemplateTypeParmType *T) { return true; } 3385}; 3386 3387/// \brief Represents the result of substituting a set of types for a template 3388/// type parameter pack. 3389/// 3390/// When a pack expansion in the source code contains multiple parameter packs 3391/// and those parameter packs correspond to different levels of template 3392/// parameter lists, this type node is used to represent a template type 3393/// parameter pack from an outer level, which has already had its argument pack 3394/// substituted but that still lives within a pack expansion that itself 3395/// could not be instantiated. When actually performing a substitution into 3396/// that pack expansion (e.g., when all template parameters have corresponding 3397/// arguments), this type will be replaced with the \c SubstTemplateTypeParmType 3398/// at the current pack substitution index. 3399class SubstTemplateTypeParmPackType : public Type, public llvm::FoldingSetNode { 3400 /// \brief The original type parameter. 3401 const TemplateTypeParmType *Replaced; 3402 3403 /// \brief A pointer to the set of template arguments that this 3404 /// parameter pack is instantiated with. 3405 const TemplateArgument *Arguments; 3406 3407 /// \brief The number of template arguments in \c Arguments. 3408 unsigned NumArguments; 3409 3410 SubstTemplateTypeParmPackType(const TemplateTypeParmType *Param, 3411 QualType Canon, 3412 const TemplateArgument &ArgPack); 3413 3414 friend class ASTContext; 3415 3416public: 3417 IdentifierInfo *getIdentifier() const { return Replaced->getIdentifier(); } 3418 3419 /// Gets the template parameter that was substituted for. 3420 const TemplateTypeParmType *getReplacedParameter() const { 3421 return Replaced; 3422 } 3423 3424 bool isSugared() const { return false; } 3425 QualType desugar() const { return QualType(this, 0); } 3426 3427 TemplateArgument getArgumentPack() const; 3428 3429 void Profile(llvm::FoldingSetNodeID &ID); 3430 static void Profile(llvm::FoldingSetNodeID &ID, 3431 const TemplateTypeParmType *Replaced, 3432 const TemplateArgument &ArgPack); 3433 3434 static bool classof(const Type *T) { 3435 return T->getTypeClass() == SubstTemplateTypeParmPack; 3436 } 3437 static bool classof(const SubstTemplateTypeParmPackType *T) { return true; } 3438}; 3439 3440/// \brief Represents a C++0x auto type. 3441/// 3442/// These types are usually a placeholder for a deduced type. However, within 3443/// templates and before the initializer is attached, there is no deduced type 3444/// and an auto type is type-dependent and canonical. 3445class AutoType : public Type, public llvm::FoldingSetNode { 3446 AutoType(QualType DeducedType) 3447 : Type(Auto, DeducedType.isNull() ? QualType(this, 0) : DeducedType, 3448 /*Dependent=*/DeducedType.isNull(), 3449 /*InstantiationDependent=*/DeducedType.isNull(), 3450 /*VariablyModified=*/false, /*ContainsParameterPack=*/false) { 3451 assert((DeducedType.isNull() || !DeducedType->isDependentType()) && 3452 "deduced a dependent type for auto"); 3453 } 3454 3455 friend class ASTContext; // ASTContext creates these 3456 3457public: 3458 bool isSugared() const { return isDeduced(); } 3459 QualType desugar() const { return getCanonicalTypeInternal(); } 3460 3461 QualType getDeducedType() const { 3462 return isDeduced() ? getCanonicalTypeInternal() : QualType(); 3463 } 3464 bool isDeduced() const { 3465 return !isDependentType(); 3466 } 3467 3468 void Profile(llvm::FoldingSetNodeID &ID) { 3469 Profile(ID, getDeducedType()); 3470 } 3471 3472 static void Profile(llvm::FoldingSetNodeID &ID, 3473 QualType Deduced) { 3474 ID.AddPointer(Deduced.getAsOpaquePtr()); 3475 } 3476 3477 static bool classof(const Type *T) { 3478 return T->getTypeClass() == Auto; 3479 } 3480 static bool classof(const AutoType *T) { return true; } 3481}; 3482 3483/// \brief Represents a type template specialization; the template 3484/// must be a class template, a type alias template, or a template 3485/// template parameter. A template which cannot be resolved to one of 3486/// these, e.g. because it is written with a dependent scope 3487/// specifier, is instead represented as a 3488/// @c DependentTemplateSpecializationType. 3489/// 3490/// A non-dependent template specialization type is always "sugar", 3491/// typically for a @c RecordType. For example, a class template 3492/// specialization type of @c vector<int> will refer to a tag type for 3493/// the instantiation @c std::vector<int, std::allocator<int>> 3494/// 3495/// Template specializations are dependent if either the template or 3496/// any of the template arguments are dependent, in which case the 3497/// type may also be canonical. 3498/// 3499/// Instances of this type are allocated with a trailing array of 3500/// TemplateArguments, followed by a QualType representing the 3501/// non-canonical aliased type when the template is a type alias 3502/// template. 3503class TemplateSpecializationType 3504 : public Type, public llvm::FoldingSetNode { 3505 /// \brief The name of the template being specialized. This is 3506 /// either a TemplateName::Template (in which case it is a 3507 /// ClassTemplateDecl*, a TemplateTemplateParmDecl*, or a 3508 /// TypeAliasTemplateDecl*), a 3509 /// TemplateName::SubstTemplateTemplateParmPack, or a 3510 /// TemplateName::SubstTemplateTemplateParm (in which case the 3511 /// replacement must, recursively, be one of these). 3512 TemplateName Template; 3513 3514 /// \brief - The number of template arguments named in this class 3515 /// template specialization. 3516 unsigned NumArgs; 3517 3518 TemplateSpecializationType(TemplateName T, 3519 const TemplateArgument *Args, 3520 unsigned NumArgs, QualType Canon, 3521 QualType Aliased); 3522 3523 friend class ASTContext; // ASTContext creates these 3524 3525public: 3526 /// \brief Determine whether any of the given template arguments are 3527 /// dependent. 3528 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 3529 unsigned NumArgs, 3530 bool &InstantiationDependent); 3531 3532 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 3533 unsigned NumArgs, 3534 bool &InstantiationDependent); 3535 3536 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &, 3537 bool &InstantiationDependent); 3538 3539 /// \brief Print a template argument list, including the '<' and '>' 3540 /// enclosing the template arguments. 3541 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 3542 unsigned NumArgs, 3543 const PrintingPolicy &Policy, 3544 bool SkipBrackets = false); 3545 3546 static std::string PrintTemplateArgumentList(const TemplateArgumentLoc *Args, 3547 unsigned NumArgs, 3548 const PrintingPolicy &Policy); 3549 3550 static std::string PrintTemplateArgumentList(const TemplateArgumentListInfo &, 3551 const PrintingPolicy &Policy); 3552 3553 /// True if this template specialization type matches a current 3554 /// instantiation in the context in which it is found. 3555 bool isCurrentInstantiation() const { 3556 return isa<InjectedClassNameType>(getCanonicalTypeInternal()); 3557 } 3558 3559 /// True if this template specialization type is for a type alias 3560 /// template. 3561 bool isTypeAlias() const; 3562 /// Get the aliased type, if this is a specialization of a type alias 3563 /// template. 3564 QualType getAliasedType() const { 3565 assert(isTypeAlias() && "not a type alias template specialization"); 3566 return *reinterpret_cast<const QualType*>(end()); 3567 } 3568 3569 typedef const TemplateArgument * iterator; 3570 3571 iterator begin() const { return getArgs(); } 3572 iterator end() const; // defined inline in TemplateBase.h 3573 3574 /// \brief Retrieve the name of the template that we are specializing. 3575 TemplateName getTemplateName() const { return Template; } 3576 3577 /// \brief Retrieve the template arguments. 3578 const TemplateArgument *getArgs() const { 3579 return reinterpret_cast<const TemplateArgument *>(this + 1); 3580 } 3581 3582 /// \brief Retrieve the number of template arguments. 3583 unsigned getNumArgs() const { return NumArgs; } 3584 3585 /// \brief Retrieve a specific template argument as a type. 3586 /// \precondition @c isArgType(Arg) 3587 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 3588 3589 bool isSugared() const { 3590 return !isDependentType() || isCurrentInstantiation() || isTypeAlias(); 3591 } 3592 QualType desugar() const { return getCanonicalTypeInternal(); } 3593 3594 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) { 3595 Profile(ID, Template, getArgs(), NumArgs, Ctx); 3596 if (isTypeAlias()) 3597 getAliasedType().Profile(ID); 3598 } 3599 3600 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 3601 const TemplateArgument *Args, 3602 unsigned NumArgs, 3603 const ASTContext &Context); 3604 3605 static bool classof(const Type *T) { 3606 return T->getTypeClass() == TemplateSpecialization; 3607 } 3608 static bool classof(const TemplateSpecializationType *T) { return true; } 3609}; 3610 3611/// \brief The injected class name of a C++ class template or class 3612/// template partial specialization. Used to record that a type was 3613/// spelled with a bare identifier rather than as a template-id; the 3614/// equivalent for non-templated classes is just RecordType. 3615/// 3616/// Injected class name types are always dependent. Template 3617/// instantiation turns these into RecordTypes. 3618/// 3619/// Injected class name types are always canonical. This works 3620/// because it is impossible to compare an injected class name type 3621/// with the corresponding non-injected template type, for the same 3622/// reason that it is impossible to directly compare template 3623/// parameters from different dependent contexts: injected class name 3624/// types can only occur within the scope of a particular templated 3625/// declaration, and within that scope every template specialization 3626/// will canonicalize to the injected class name (when appropriate 3627/// according to the rules of the language). 3628class InjectedClassNameType : public Type { 3629 CXXRecordDecl *Decl; 3630 3631 /// The template specialization which this type represents. 3632 /// For example, in 3633 /// template <class T> class A { ... }; 3634 /// this is A<T>, whereas in 3635 /// template <class X, class Y> class A<B<X,Y> > { ... }; 3636 /// this is A<B<X,Y> >. 3637 /// 3638 /// It is always unqualified, always a template specialization type, 3639 /// and always dependent. 3640 QualType InjectedType; 3641 3642 friend class ASTContext; // ASTContext creates these. 3643 friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not 3644 // currently suitable for AST reading, too much 3645 // interdependencies. 3646 InjectedClassNameType(CXXRecordDecl *D, QualType TST) 3647 : Type(InjectedClassName, QualType(), /*Dependent=*/true, 3648 /*InstantiationDependent=*/true, 3649 /*VariablyModified=*/false, 3650 /*ContainsUnexpandedParameterPack=*/false), 3651 Decl(D), InjectedType(TST) { 3652 assert(isa<TemplateSpecializationType>(TST)); 3653 assert(!TST.hasQualifiers()); 3654 assert(TST->isDependentType()); 3655 } 3656 3657public: 3658 QualType getInjectedSpecializationType() const { return InjectedType; } 3659 const TemplateSpecializationType *getInjectedTST() const { 3660 return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); 3661 } 3662 3663 CXXRecordDecl *getDecl() const; 3664 3665 bool isSugared() const { return false; } 3666 QualType desugar() const { return QualType(this, 0); } 3667 3668 static bool classof(const Type *T) { 3669 return T->getTypeClass() == InjectedClassName; 3670 } 3671 static bool classof(const InjectedClassNameType *T) { return true; } 3672}; 3673 3674/// \brief The kind of a tag type. 3675enum TagTypeKind { 3676 /// \brief The "struct" keyword. 3677 TTK_Struct, 3678 /// \brief The "union" keyword. 3679 TTK_Union, 3680 /// \brief The "class" keyword. 3681 TTK_Class, 3682 /// \brief The "enum" keyword. 3683 TTK_Enum 3684}; 3685 3686/// \brief The elaboration keyword that precedes a qualified type name or 3687/// introduces an elaborated-type-specifier. 3688enum ElaboratedTypeKeyword { 3689 /// \brief The "struct" keyword introduces the elaborated-type-specifier. 3690 ETK_Struct, 3691 /// \brief The "union" keyword introduces the elaborated-type-specifier. 3692 ETK_Union, 3693 /// \brief The "class" keyword introduces the elaborated-type-specifier. 3694 ETK_Class, 3695 /// \brief The "enum" keyword introduces the elaborated-type-specifier. 3696 ETK_Enum, 3697 /// \brief The "typename" keyword precedes the qualified type name, e.g., 3698 /// \c typename T::type. 3699 ETK_Typename, 3700 /// \brief No keyword precedes the qualified type name. 3701 ETK_None 3702}; 3703 3704/// A helper class for Type nodes having an ElaboratedTypeKeyword. 3705/// The keyword in stored in the free bits of the base class. 3706/// Also provides a few static helpers for converting and printing 3707/// elaborated type keyword and tag type kind enumerations. 3708class TypeWithKeyword : public Type { 3709protected: 3710 TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, 3711 QualType Canonical, bool Dependent, 3712 bool InstantiationDependent, bool VariablyModified, 3713 bool ContainsUnexpandedParameterPack) 3714 : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified, 3715 ContainsUnexpandedParameterPack) { 3716 TypeWithKeywordBits.Keyword = Keyword; 3717 } 3718 3719public: 3720 ElaboratedTypeKeyword getKeyword() const { 3721 return static_cast<ElaboratedTypeKeyword>(TypeWithKeywordBits.Keyword); 3722 } 3723 3724 /// getKeywordForTypeSpec - Converts a type specifier (DeclSpec::TST) 3725 /// into an elaborated type keyword. 3726 static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); 3727 3728 /// getTagTypeKindForTypeSpec - Converts a type specifier (DeclSpec::TST) 3729 /// into a tag type kind. It is an error to provide a type specifier 3730 /// which *isn't* a tag kind here. 3731 static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); 3732 3733 /// getKeywordForTagDeclKind - Converts a TagTypeKind into an 3734 /// elaborated type keyword. 3735 static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); 3736 3737 /// getTagTypeKindForKeyword - Converts an elaborated type keyword into 3738 // a TagTypeKind. It is an error to provide an elaborated type keyword 3739 /// which *isn't* a tag kind here. 3740 static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); 3741 3742 static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); 3743 3744 static const char *getKeywordName(ElaboratedTypeKeyword Keyword); 3745 3746 static const char *getTagTypeKindName(TagTypeKind Kind) { 3747 return getKeywordName(getKeywordForTagTypeKind(Kind)); 3748 } 3749 3750 class CannotCastToThisType {}; 3751 static CannotCastToThisType classof(const Type *); 3752}; 3753 3754/// \brief Represents a type that was referred to using an elaborated type 3755/// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, 3756/// or both. 3757/// 3758/// This type is used to keep track of a type name as written in the 3759/// source code, including tag keywords and any nested-name-specifiers. 3760/// The type itself is always "sugar", used to express what was written 3761/// in the source code but containing no additional semantic information. 3762class ElaboratedType : public TypeWithKeyword, public llvm::FoldingSetNode { 3763 3764 /// \brief The nested name specifier containing the qualifier. 3765 NestedNameSpecifier *NNS; 3766 3767 /// \brief The type that this qualified name refers to. 3768 QualType NamedType; 3769 3770 ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3771 QualType NamedType, QualType CanonType) 3772 : TypeWithKeyword(Keyword, Elaborated, CanonType, 3773 NamedType->isDependentType(), 3774 NamedType->isInstantiationDependentType(), 3775 NamedType->isVariablyModifiedType(), 3776 NamedType->containsUnexpandedParameterPack()), 3777 NNS(NNS), NamedType(NamedType) { 3778 assert(!(Keyword == ETK_None && NNS == 0) && 3779 "ElaboratedType cannot have elaborated type keyword " 3780 "and name qualifier both null."); 3781 } 3782 3783 friend class ASTContext; // ASTContext creates these 3784 3785public: 3786 ~ElaboratedType(); 3787 3788 /// \brief Retrieve the qualification on this type. 3789 NestedNameSpecifier *getQualifier() const { return NNS; } 3790 3791 /// \brief Retrieve the type named by the qualified-id. 3792 QualType getNamedType() const { return NamedType; } 3793 3794 /// \brief Remove a single level of sugar. 3795 QualType desugar() const { return getNamedType(); } 3796 3797 /// \brief Returns whether this type directly provides sugar. 3798 bool isSugared() const { return true; } 3799 3800 void Profile(llvm::FoldingSetNodeID &ID) { 3801 Profile(ID, getKeyword(), NNS, NamedType); 3802 } 3803 3804 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3805 NestedNameSpecifier *NNS, QualType NamedType) { 3806 ID.AddInteger(Keyword); 3807 ID.AddPointer(NNS); 3808 NamedType.Profile(ID); 3809 } 3810 3811 static bool classof(const Type *T) { 3812 return T->getTypeClass() == Elaborated; 3813 } 3814 static bool classof(const ElaboratedType *T) { return true; } 3815}; 3816 3817/// \brief Represents a qualified type name for which the type name is 3818/// dependent. 3819/// 3820/// DependentNameType represents a class of dependent types that involve a 3821/// dependent nested-name-specifier (e.g., "T::") followed by a (dependent) 3822/// name of a type. The DependentNameType may start with a "typename" (for a 3823/// typename-specifier), "class", "struct", "union", or "enum" (for a 3824/// dependent elaborated-type-specifier), or nothing (in contexts where we 3825/// know that we must be referring to a type, e.g., in a base class specifier). 3826class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { 3827 3828 /// \brief The nested name specifier containing the qualifier. 3829 NestedNameSpecifier *NNS; 3830 3831 /// \brief The type that this typename specifier refers to. 3832 const IdentifierInfo *Name; 3833 3834 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3835 const IdentifierInfo *Name, QualType CanonType) 3836 : TypeWithKeyword(Keyword, DependentName, CanonType, /*Dependent=*/true, 3837 /*InstantiationDependent=*/true, 3838 /*VariablyModified=*/false, 3839 NNS->containsUnexpandedParameterPack()), 3840 NNS(NNS), Name(Name) { 3841 assert(NNS->isDependent() && 3842 "DependentNameType requires a dependent nested-name-specifier"); 3843 } 3844 3845 friend class ASTContext; // ASTContext creates these 3846 3847public: 3848 /// \brief Retrieve the qualification on this type. 3849 NestedNameSpecifier *getQualifier() const { return NNS; } 3850 3851 /// \brief Retrieve the type named by the typename specifier as an 3852 /// identifier. 3853 /// 3854 /// This routine will return a non-NULL identifier pointer when the 3855 /// form of the original typename was terminated by an identifier, 3856 /// e.g., "typename T::type". 3857 const IdentifierInfo *getIdentifier() const { 3858 return Name; 3859 } 3860 3861 bool isSugared() const { return false; } 3862 QualType desugar() const { return QualType(this, 0); } 3863 3864 void Profile(llvm::FoldingSetNodeID &ID) { 3865 Profile(ID, getKeyword(), NNS, Name); 3866 } 3867 3868 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3869 NestedNameSpecifier *NNS, const IdentifierInfo *Name) { 3870 ID.AddInteger(Keyword); 3871 ID.AddPointer(NNS); 3872 ID.AddPointer(Name); 3873 } 3874 3875 static bool classof(const Type *T) { 3876 return T->getTypeClass() == DependentName; 3877 } 3878 static bool classof(const DependentNameType *T) { return true; } 3879}; 3880 3881/// DependentTemplateSpecializationType - Represents a template 3882/// specialization type whose template cannot be resolved, e.g. 3883/// A<T>::template B<T> 3884class DependentTemplateSpecializationType : 3885 public TypeWithKeyword, public llvm::FoldingSetNode { 3886 3887 /// \brief The nested name specifier containing the qualifier. 3888 NestedNameSpecifier *NNS; 3889 3890 /// \brief The identifier of the template. 3891 const IdentifierInfo *Name; 3892 3893 /// \brief - The number of template arguments named in this class 3894 /// template specialization. 3895 unsigned NumArgs; 3896 3897 const TemplateArgument *getArgBuffer() const { 3898 return reinterpret_cast<const TemplateArgument*>(this+1); 3899 } 3900 TemplateArgument *getArgBuffer() { 3901 return reinterpret_cast<TemplateArgument*>(this+1); 3902 } 3903 3904 DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 3905 NestedNameSpecifier *NNS, 3906 const IdentifierInfo *Name, 3907 unsigned NumArgs, 3908 const TemplateArgument *Args, 3909 QualType Canon); 3910 3911 friend class ASTContext; // ASTContext creates these 3912 3913public: 3914 NestedNameSpecifier *getQualifier() const { return NNS; } 3915 const IdentifierInfo *getIdentifier() const { return Name; } 3916 3917 /// \brief Retrieve the template arguments. 3918 const TemplateArgument *getArgs() const { 3919 return getArgBuffer(); 3920 } 3921 3922 /// \brief Retrieve the number of template arguments. 3923 unsigned getNumArgs() const { return NumArgs; } 3924 3925 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 3926 3927 typedef const TemplateArgument * iterator; 3928 iterator begin() const { return getArgs(); } 3929 iterator end() const; // inline in TemplateBase.h 3930 3931 bool isSugared() const { return false; } 3932 QualType desugar() const { return QualType(this, 0); } 3933 3934 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) { 3935 Profile(ID, Context, getKeyword(), NNS, Name, NumArgs, getArgs()); 3936 } 3937 3938 static void Profile(llvm::FoldingSetNodeID &ID, 3939 const ASTContext &Context, 3940 ElaboratedTypeKeyword Keyword, 3941 NestedNameSpecifier *Qualifier, 3942 const IdentifierInfo *Name, 3943 unsigned NumArgs, 3944 const TemplateArgument *Args); 3945 3946 static bool classof(const Type *T) { 3947 return T->getTypeClass() == DependentTemplateSpecialization; 3948 } 3949 static bool classof(const DependentTemplateSpecializationType *T) { 3950 return true; 3951 } 3952}; 3953 3954/// \brief Represents a pack expansion of types. 3955/// 3956/// Pack expansions are part of C++0x variadic templates. A pack 3957/// expansion contains a pattern, which itself contains one or more 3958/// "unexpanded" parameter packs. When instantiated, a pack expansion 3959/// produces a series of types, each instantiated from the pattern of 3960/// the expansion, where the Ith instantiation of the pattern uses the 3961/// Ith arguments bound to each of the unexpanded parameter packs. The 3962/// pack expansion is considered to "expand" these unexpanded 3963/// parameter packs. 3964/// 3965/// \code 3966/// template<typename ...Types> struct tuple; 3967/// 3968/// template<typename ...Types> 3969/// struct tuple_of_references { 3970/// typedef tuple<Types&...> type; 3971/// }; 3972/// \endcode 3973/// 3974/// Here, the pack expansion \c Types&... is represented via a 3975/// PackExpansionType whose pattern is Types&. 3976class PackExpansionType : public Type, public llvm::FoldingSetNode { 3977 /// \brief The pattern of the pack expansion. 3978 QualType Pattern; 3979 3980 /// \brief The number of expansions that this pack expansion will 3981 /// generate when substituted (+1), or indicates that 3982 /// 3983 /// This field will only have a non-zero value when some of the parameter 3984 /// packs that occur within the pattern have been substituted but others have 3985 /// not. 3986 unsigned NumExpansions; 3987 3988 PackExpansionType(QualType Pattern, QualType Canon, 3989 llvm::Optional<unsigned> NumExpansions) 3990 : Type(PackExpansion, Canon, /*Dependent=*/true, 3991 /*InstantiationDependent=*/true, 3992 /*VariableModified=*/Pattern->isVariablyModifiedType(), 3993 /*ContainsUnexpandedParameterPack=*/false), 3994 Pattern(Pattern), 3995 NumExpansions(NumExpansions? *NumExpansions + 1: 0) { } 3996 3997 friend class ASTContext; // ASTContext creates these 3998 3999public: 4000 /// \brief Retrieve the pattern of this pack expansion, which is the 4001 /// type that will be repeatedly instantiated when instantiating the 4002 /// pack expansion itself. 4003 QualType getPattern() const { return Pattern; } 4004 4005 /// \brief Retrieve the number of expansions that this pack expansion will 4006 /// generate, if known. 4007 llvm::Optional<unsigned> getNumExpansions() const { 4008 if (NumExpansions) 4009 return NumExpansions - 1; 4010 4011 return llvm::Optional<unsigned>(); 4012 } 4013 4014 bool isSugared() const { return false; } 4015 QualType desugar() const { return QualType(this, 0); } 4016 4017 void Profile(llvm::FoldingSetNodeID &ID) { 4018 Profile(ID, getPattern(), getNumExpansions()); 4019 } 4020 4021 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pattern, 4022 llvm::Optional<unsigned> NumExpansions) { 4023 ID.AddPointer(Pattern.getAsOpaquePtr()); 4024 ID.AddBoolean(NumExpansions); 4025 if (NumExpansions) 4026 ID.AddInteger(*NumExpansions); 4027 } 4028 4029 static bool classof(const Type *T) { 4030 return T->getTypeClass() == PackExpansion; 4031 } 4032 static bool classof(const PackExpansionType *T) { 4033 return true; 4034 } 4035}; 4036 4037/// ObjCObjectType - Represents a class type in Objective C. 4038/// Every Objective C type is a combination of a base type and a 4039/// list of protocols. 4040/// 4041/// Given the following declarations: 4042/// @class C; 4043/// @protocol P; 4044/// 4045/// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType 4046/// with base C and no protocols. 4047/// 4048/// 'C<P>' is an ObjCObjectType with base C and protocol list [P]. 4049/// 4050/// 'id' is a TypedefType which is sugar for an ObjCPointerType whose 4051/// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType 4052/// and no protocols. 4053/// 4054/// 'id<P>' is an ObjCPointerType whose pointee is an ObjCObjecType 4055/// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually 4056/// this should get its own sugar class to better represent the source. 4057class ObjCObjectType : public Type { 4058 // ObjCObjectType.NumProtocols - the number of protocols stored 4059 // after the ObjCObjectPointerType node. 4060 // 4061 // These protocols are those written directly on the type. If 4062 // protocol qualifiers ever become additive, the iterators will need 4063 // to get kindof complicated. 4064 // 4065 // In the canonical object type, these are sorted alphabetically 4066 // and uniqued. 4067 4068 /// Either a BuiltinType or an InterfaceType or sugar for either. 4069 QualType BaseType; 4070 4071 ObjCProtocolDecl * const *getProtocolStorage() const { 4072 return const_cast<ObjCObjectType*>(this)->getProtocolStorage(); 4073 } 4074 4075 ObjCProtocolDecl **getProtocolStorage(); 4076 4077protected: 4078 ObjCObjectType(QualType Canonical, QualType Base, 4079 ObjCProtocolDecl * const *Protocols, unsigned NumProtocols); 4080 4081 enum Nonce_ObjCInterface { Nonce_ObjCInterface }; 4082 ObjCObjectType(enum Nonce_ObjCInterface) 4083 : Type(ObjCInterface, QualType(), false, false, false, false), 4084 BaseType(QualType(this_(), 0)) { 4085 ObjCObjectTypeBits.NumProtocols = 0; 4086 } 4087 4088public: 4089 /// getBaseType - Gets the base type of this object type. This is 4090 /// always (possibly sugar for) one of: 4091 /// - the 'id' builtin type (as opposed to the 'id' type visible to the 4092 /// user, which is a typedef for an ObjCPointerType) 4093 /// - the 'Class' builtin type (same caveat) 4094 /// - an ObjCObjectType (currently always an ObjCInterfaceType) 4095 QualType getBaseType() const { return BaseType; } 4096 4097 bool isObjCId() const { 4098 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); 4099 } 4100 bool isObjCClass() const { 4101 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); 4102 } 4103 bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } 4104 bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } 4105 bool isObjCUnqualifiedIdOrClass() const { 4106 if (!qual_empty()) return false; 4107 if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) 4108 return T->getKind() == BuiltinType::ObjCId || 4109 T->getKind() == BuiltinType::ObjCClass; 4110 return false; 4111 } 4112 bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } 4113 bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } 4114 4115 /// Gets the interface declaration for this object type, if the base type 4116 /// really is an interface. 4117 ObjCInterfaceDecl *getInterface() const; 4118 4119 typedef ObjCProtocolDecl * const *qual_iterator; 4120 4121 qual_iterator qual_begin() const { return getProtocolStorage(); } 4122 qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } 4123 4124 bool qual_empty() const { return getNumProtocols() == 0; } 4125 4126 /// getNumProtocols - Return the number of qualifying protocols in this 4127 /// interface type, or 0 if there are none. 4128 unsigned getNumProtocols() const { return ObjCObjectTypeBits.NumProtocols; } 4129 4130 /// \brief Fetch a protocol by index. 4131 ObjCProtocolDecl *getProtocol(unsigned I) const { 4132 assert(I < getNumProtocols() && "Out-of-range protocol access"); 4133 return qual_begin()[I]; 4134 } 4135 4136 bool isSugared() const { return false; } 4137 QualType desugar() const { return QualType(this, 0); } 4138 4139 static bool classof(const Type *T) { 4140 return T->getTypeClass() == ObjCObject || 4141 T->getTypeClass() == ObjCInterface; 4142 } 4143 static bool classof(const ObjCObjectType *) { return true; } 4144}; 4145 4146/// ObjCObjectTypeImpl - A class providing a concrete implementation 4147/// of ObjCObjectType, so as to not increase the footprint of 4148/// ObjCInterfaceType. Code outside of ASTContext and the core type 4149/// system should not reference this type. 4150class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { 4151 friend class ASTContext; 4152 4153 // If anyone adds fields here, ObjCObjectType::getProtocolStorage() 4154 // will need to be modified. 4155 4156 ObjCObjectTypeImpl(QualType Canonical, QualType Base, 4157 ObjCProtocolDecl * const *Protocols, 4158 unsigned NumProtocols) 4159 : ObjCObjectType(Canonical, Base, Protocols, NumProtocols) {} 4160 4161public: 4162 void Profile(llvm::FoldingSetNodeID &ID); 4163 static void Profile(llvm::FoldingSetNodeID &ID, 4164 QualType Base, 4165 ObjCProtocolDecl *const *protocols, 4166 unsigned NumProtocols); 4167}; 4168 4169inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorage() { 4170 return reinterpret_cast<ObjCProtocolDecl**>( 4171 static_cast<ObjCObjectTypeImpl*>(this) + 1); 4172} 4173 4174/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 4175/// object oriented design. They basically correspond to C++ classes. There 4176/// are two kinds of interface types, normal interfaces like "NSString" and 4177/// qualified interfaces, which are qualified with a protocol list like 4178/// "NSString<NSCopyable, NSAmazing>". 4179/// 4180/// ObjCInterfaceType guarantees the following properties when considered 4181/// as a subtype of its superclass, ObjCObjectType: 4182/// - There are no protocol qualifiers. To reinforce this, code which 4183/// tries to invoke the protocol methods via an ObjCInterfaceType will 4184/// fail to compile. 4185/// - It is its own base type. That is, if T is an ObjCInterfaceType*, 4186/// T->getBaseType() == QualType(T, 0). 4187class ObjCInterfaceType : public ObjCObjectType { 4188 ObjCInterfaceDecl *Decl; 4189 4190 ObjCInterfaceType(const ObjCInterfaceDecl *D) 4191 : ObjCObjectType(Nonce_ObjCInterface), 4192 Decl(const_cast<ObjCInterfaceDecl*>(D)) {} 4193 friend class ASTContext; // ASTContext creates these. 4194 4195public: 4196 /// getDecl - Get the declaration of this interface. 4197 ObjCInterfaceDecl *getDecl() const { return Decl; } 4198 4199 bool isSugared() const { return false; } 4200 QualType desugar() const { return QualType(this, 0); } 4201 4202 static bool classof(const Type *T) { 4203 return T->getTypeClass() == ObjCInterface; 4204 } 4205 static bool classof(const ObjCInterfaceType *) { return true; } 4206 4207 // Nonsense to "hide" certain members of ObjCObjectType within this 4208 // class. People asking for protocols on an ObjCInterfaceType are 4209 // not going to get what they want: ObjCInterfaceTypes are 4210 // guaranteed to have no protocols. 4211 enum { 4212 qual_iterator, 4213 qual_begin, 4214 qual_end, 4215 getNumProtocols, 4216 getProtocol 4217 }; 4218}; 4219 4220inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { 4221 if (const ObjCInterfaceType *T = 4222 getBaseType()->getAs<ObjCInterfaceType>()) 4223 return T->getDecl(); 4224 return 0; 4225} 4226 4227/// ObjCObjectPointerType - Used to represent a pointer to an 4228/// Objective C object. These are constructed from pointer 4229/// declarators when the pointee type is an ObjCObjectType (or sugar 4230/// for one). In addition, the 'id' and 'Class' types are typedefs 4231/// for these, and the protocol-qualified types 'id<P>' and 'Class<P>' 4232/// are translated into these. 4233/// 4234/// Pointers to pointers to Objective C objects are still PointerTypes; 4235/// only the first level of pointer gets it own type implementation. 4236class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 4237 QualType PointeeType; 4238 4239 ObjCObjectPointerType(QualType Canonical, QualType Pointee) 4240 : Type(ObjCObjectPointer, Canonical, false, false, false, false), 4241 PointeeType(Pointee) {} 4242 friend class ASTContext; // ASTContext creates these. 4243 4244public: 4245 /// getPointeeType - Gets the type pointed to by this ObjC pointer. 4246 /// The result will always be an ObjCObjectType or sugar thereof. 4247 QualType getPointeeType() const { return PointeeType; } 4248 4249 /// getObjCObjectType - Gets the type pointed to by this ObjC 4250 /// pointer. This method always returns non-null. 4251 /// 4252 /// This method is equivalent to getPointeeType() except that 4253 /// it discards any typedefs (or other sugar) between this 4254 /// type and the "outermost" object type. So for: 4255 /// @class A; @protocol P; @protocol Q; 4256 /// typedef A<P> AP; 4257 /// typedef A A1; 4258 /// typedef A1<P> A1P; 4259 /// typedef A1P<Q> A1PQ; 4260 /// For 'A*', getObjectType() will return 'A'. 4261 /// For 'A<P>*', getObjectType() will return 'A<P>'. 4262 /// For 'AP*', getObjectType() will return 'A<P>'. 4263 /// For 'A1*', getObjectType() will return 'A'. 4264 /// For 'A1<P>*', getObjectType() will return 'A1<P>'. 4265 /// For 'A1P*', getObjectType() will return 'A1<P>'. 4266 /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because 4267 /// adding protocols to a protocol-qualified base discards the 4268 /// old qualifiers (for now). But if it didn't, getObjectType() 4269 /// would return 'A1P<Q>' (and we'd have to make iterating over 4270 /// qualifiers more complicated). 4271 const ObjCObjectType *getObjectType() const { 4272 return PointeeType->castAs<ObjCObjectType>(); 4273 } 4274 4275 /// getInterfaceType - If this pointer points to an Objective C 4276 /// @interface type, gets the type for that interface. Any protocol 4277 /// qualifiers on the interface are ignored. 4278 /// 4279 /// \return null if the base type for this pointer is 'id' or 'Class' 4280 const ObjCInterfaceType *getInterfaceType() const { 4281 return getObjectType()->getBaseType()->getAs<ObjCInterfaceType>(); 4282 } 4283 4284 /// getInterfaceDecl - If this pointer points to an Objective @interface 4285 /// type, gets the declaration for that interface. 4286 /// 4287 /// \return null if the base type for this pointer is 'id' or 'Class' 4288 ObjCInterfaceDecl *getInterfaceDecl() const { 4289 return getObjectType()->getInterface(); 4290 } 4291 4292 /// isObjCIdType - True if this is equivalent to the 'id' type, i.e. if 4293 /// its object type is the primitive 'id' type with no protocols. 4294 bool isObjCIdType() const { 4295 return getObjectType()->isObjCUnqualifiedId(); 4296 } 4297 4298 /// isObjCClassType - True if this is equivalent to the 'Class' type, 4299 /// i.e. if its object tive is the primitive 'Class' type with no protocols. 4300 bool isObjCClassType() const { 4301 return getObjectType()->isObjCUnqualifiedClass(); 4302 } 4303 4304 /// isObjCQualifiedIdType - True if this is equivalent to 'id<P>' for some 4305 /// non-empty set of protocols. 4306 bool isObjCQualifiedIdType() const { 4307 return getObjectType()->isObjCQualifiedId(); 4308 } 4309 4310 /// isObjCQualifiedClassType - True if this is equivalent to 'Class<P>' for 4311 /// some non-empty set of protocols. 4312 bool isObjCQualifiedClassType() const { 4313 return getObjectType()->isObjCQualifiedClass(); 4314 } 4315 4316 /// An iterator over the qualifiers on the object type. Provided 4317 /// for convenience. This will always iterate over the full set of 4318 /// protocols on a type, not just those provided directly. 4319 typedef ObjCObjectType::qual_iterator qual_iterator; 4320 4321 qual_iterator qual_begin() const { 4322 return getObjectType()->qual_begin(); 4323 } 4324 qual_iterator qual_end() const { 4325 return getObjectType()->qual_end(); 4326 } 4327 bool qual_empty() const { return getObjectType()->qual_empty(); } 4328 4329 /// getNumProtocols - Return the number of qualifying protocols on 4330 /// the object type. 4331 unsigned getNumProtocols() const { 4332 return getObjectType()->getNumProtocols(); 4333 } 4334 4335 /// \brief Retrieve a qualifying protocol by index on the object 4336 /// type. 4337 ObjCProtocolDecl *getProtocol(unsigned I) const { 4338 return getObjectType()->getProtocol(I); 4339 } 4340 4341 bool isSugared() const { return false; } 4342 QualType desugar() const { return QualType(this, 0); } 4343 4344 void Profile(llvm::FoldingSetNodeID &ID) { 4345 Profile(ID, getPointeeType()); 4346 } 4347 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 4348 ID.AddPointer(T.getAsOpaquePtr()); 4349 } 4350 static bool classof(const Type *T) { 4351 return T->getTypeClass() == ObjCObjectPointer; 4352 } 4353 static bool classof(const ObjCObjectPointerType *) { return true; } 4354}; 4355 4356class AtomicType : public Type, public llvm::FoldingSetNode { 4357 QualType ValueType; 4358 4359 AtomicType(QualType ValTy, QualType Canonical) 4360 : Type(Atomic, Canonical, ValTy->isDependentType(), 4361 ValTy->isInstantiationDependentType(), 4362 ValTy->isVariablyModifiedType(), 4363 ValTy->containsUnexpandedParameterPack()), 4364 ValueType(ValTy) {} 4365 friend class ASTContext; // ASTContext creates these. 4366 4367 public: 4368 /// getValueType - Gets the type contained by this atomic type, i.e. 4369 /// the type returned by performing an atomic load of this atomic type. 4370 QualType getValueType() const { return ValueType; } 4371 4372 bool isSugared() const { return false; } 4373 QualType desugar() const { return QualType(this, 0); } 4374 4375 void Profile(llvm::FoldingSetNodeID &ID) { 4376 Profile(ID, getValueType()); 4377 } 4378 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 4379 ID.AddPointer(T.getAsOpaquePtr()); 4380 } 4381 static bool classof(const Type *T) { 4382 return T->getTypeClass() == Atomic; 4383 } 4384 static bool classof(const AtomicType *) { return true; } 4385}; 4386 4387/// A qualifier set is used to build a set of qualifiers. 4388class QualifierCollector : public Qualifiers { 4389public: 4390 QualifierCollector(Qualifiers Qs = Qualifiers()) : Qualifiers(Qs) {} 4391 4392 /// Collect any qualifiers on the given type and return an 4393 /// unqualified type. The qualifiers are assumed to be consistent 4394 /// with those already in the type. 4395 const Type *strip(QualType type) { 4396 addFastQualifiers(type.getLocalFastQualifiers()); 4397 if (!type.hasLocalNonFastQualifiers()) 4398 return type.getTypePtrUnsafe(); 4399 4400 const ExtQuals *extQuals = type.getExtQualsUnsafe(); 4401 addConsistentQualifiers(extQuals->getQualifiers()); 4402 return extQuals->getBaseType(); 4403 } 4404 4405 /// Apply the collected qualifiers to the given type. 4406 QualType apply(const ASTContext &Context, QualType QT) const; 4407 4408 /// Apply the collected qualifiers to the given type. 4409 QualType apply(const ASTContext &Context, const Type* T) const; 4410}; 4411 4412 4413// Inline function definitions. 4414 4415inline const Type *QualType::getTypePtr() const { 4416 return getCommonPtr()->BaseType; 4417} 4418 4419inline const Type *QualType::getTypePtrOrNull() const { 4420 return (isNull() ? 0 : getCommonPtr()->BaseType); 4421} 4422 4423inline SplitQualType QualType::split() const { 4424 if (!hasLocalNonFastQualifiers()) 4425 return SplitQualType(getTypePtrUnsafe(), 4426 Qualifiers::fromFastMask(getLocalFastQualifiers())); 4427 4428 const ExtQuals *eq = getExtQualsUnsafe(); 4429 Qualifiers qs = eq->getQualifiers(); 4430 qs.addFastQualifiers(getLocalFastQualifiers()); 4431 return SplitQualType(eq->getBaseType(), qs); 4432} 4433 4434inline Qualifiers QualType::getLocalQualifiers() const { 4435 Qualifiers Quals; 4436 if (hasLocalNonFastQualifiers()) 4437 Quals = getExtQualsUnsafe()->getQualifiers(); 4438 Quals.addFastQualifiers(getLocalFastQualifiers()); 4439 return Quals; 4440} 4441 4442inline Qualifiers QualType::getQualifiers() const { 4443 Qualifiers quals = getCommonPtr()->CanonicalType.getLocalQualifiers(); 4444 quals.addFastQualifiers(getLocalFastQualifiers()); 4445 return quals; 4446} 4447 4448inline unsigned QualType::getCVRQualifiers() const { 4449 unsigned cvr = getCommonPtr()->CanonicalType.getLocalCVRQualifiers(); 4450 cvr |= getLocalCVRQualifiers(); 4451 return cvr; 4452} 4453 4454inline QualType QualType::getCanonicalType() const { 4455 QualType canon = getCommonPtr()->CanonicalType; 4456 return canon.withFastQualifiers(getLocalFastQualifiers()); 4457} 4458 4459inline bool QualType::isCanonical() const { 4460 return getTypePtr()->isCanonicalUnqualified(); 4461} 4462 4463inline bool QualType::isCanonicalAsParam() const { 4464 if (!isCanonical()) return false; 4465 if (hasLocalQualifiers()) return false; 4466 4467 const Type *T = getTypePtr(); 4468 if (T->isVariablyModifiedType() && T->hasSizedVLAType()) 4469 return false; 4470 4471 return !isa<FunctionType>(T) && !isa<ArrayType>(T); 4472} 4473 4474inline bool QualType::isConstQualified() const { 4475 return isLocalConstQualified() || 4476 getCommonPtr()->CanonicalType.isLocalConstQualified(); 4477} 4478 4479inline bool QualType::isRestrictQualified() const { 4480 return isLocalRestrictQualified() || 4481 getCommonPtr()->CanonicalType.isLocalRestrictQualified(); 4482} 4483 4484 4485inline bool QualType::isVolatileQualified() const { 4486 return isLocalVolatileQualified() || 4487 getCommonPtr()->CanonicalType.isLocalVolatileQualified(); 4488} 4489 4490inline bool QualType::hasQualifiers() const { 4491 return hasLocalQualifiers() || 4492 getCommonPtr()->CanonicalType.hasLocalQualifiers(); 4493} 4494 4495inline QualType QualType::getUnqualifiedType() const { 4496 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4497 return QualType(getTypePtr(), 0); 4498 4499 return QualType(getSplitUnqualifiedTypeImpl(*this).first, 0); 4500} 4501 4502inline SplitQualType QualType::getSplitUnqualifiedType() const { 4503 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4504 return split(); 4505 4506 return getSplitUnqualifiedTypeImpl(*this); 4507} 4508 4509inline void QualType::removeLocalConst() { 4510 removeLocalFastQualifiers(Qualifiers::Const); 4511} 4512 4513inline void QualType::removeLocalRestrict() { 4514 removeLocalFastQualifiers(Qualifiers::Restrict); 4515} 4516 4517inline void QualType::removeLocalVolatile() { 4518 removeLocalFastQualifiers(Qualifiers::Volatile); 4519} 4520 4521inline void QualType::removeLocalCVRQualifiers(unsigned Mask) { 4522 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 4523 assert((int)Qualifiers::CVRMask == (int)Qualifiers::FastMask); 4524 4525 // Fast path: we don't need to touch the slow qualifiers. 4526 removeLocalFastQualifiers(Mask); 4527} 4528 4529/// getAddressSpace - Return the address space of this type. 4530inline unsigned QualType::getAddressSpace() const { 4531 return getQualifiers().getAddressSpace(); 4532} 4533 4534/// getObjCGCAttr - Return the gc attribute of this type. 4535inline Qualifiers::GC QualType::getObjCGCAttr() const { 4536 return getQualifiers().getObjCGCAttr(); 4537} 4538 4539inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { 4540 if (const PointerType *PT = t.getAs<PointerType>()) { 4541 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 4542 return FT->getExtInfo(); 4543 } else if (const FunctionType *FT = t.getAs<FunctionType>()) 4544 return FT->getExtInfo(); 4545 4546 return FunctionType::ExtInfo(); 4547} 4548 4549inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { 4550 return getFunctionExtInfo(*t); 4551} 4552 4553/// isMoreQualifiedThan - Determine whether this type is more 4554/// qualified than the Other type. For example, "const volatile int" 4555/// is more qualified than "const int", "volatile int", and 4556/// "int". However, it is not more qualified than "const volatile 4557/// int". 4558inline bool QualType::isMoreQualifiedThan(QualType other) const { 4559 Qualifiers myQuals = getQualifiers(); 4560 Qualifiers otherQuals = other.getQualifiers(); 4561 return (myQuals != otherQuals && myQuals.compatiblyIncludes(otherQuals)); 4562} 4563 4564/// isAtLeastAsQualifiedAs - Determine whether this type is at last 4565/// as qualified as the Other type. For example, "const volatile 4566/// int" is at least as qualified as "const int", "volatile int", 4567/// "int", and "const volatile int". 4568inline bool QualType::isAtLeastAsQualifiedAs(QualType other) const { 4569 return getQualifiers().compatiblyIncludes(other.getQualifiers()); 4570} 4571 4572/// getNonReferenceType - If Type is a reference type (e.g., const 4573/// int&), returns the type that the reference refers to ("const 4574/// int"). Otherwise, returns the type itself. This routine is used 4575/// throughout Sema to implement C++ 5p6: 4576/// 4577/// If an expression initially has the type "reference to T" (8.3.2, 4578/// 8.5.3), the type is adjusted to "T" prior to any further 4579/// analysis, the expression designates the object or function 4580/// denoted by the reference, and the expression is an lvalue. 4581inline QualType QualType::getNonReferenceType() const { 4582 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 4583 return RefType->getPointeeType(); 4584 else 4585 return *this; 4586} 4587 4588inline bool QualType::isCForbiddenLValueType() const { 4589 return ((getTypePtr()->isVoidType() && !hasQualifiers()) || 4590 getTypePtr()->isFunctionType()); 4591} 4592 4593/// \brief Tests whether the type is categorized as a fundamental type. 4594/// 4595/// \returns True for types specified in C++0x [basic.fundamental]. 4596inline bool Type::isFundamentalType() const { 4597 return isVoidType() || 4598 // FIXME: It's really annoying that we don't have an 4599 // 'isArithmeticType()' which agrees with the standard definition. 4600 (isArithmeticType() && !isEnumeralType()); 4601} 4602 4603/// \brief Tests whether the type is categorized as a compound type. 4604/// 4605/// \returns True for types specified in C++0x [basic.compound]. 4606inline bool Type::isCompoundType() const { 4607 // C++0x [basic.compound]p1: 4608 // Compound types can be constructed in the following ways: 4609 // -- arrays of objects of a given type [...]; 4610 return isArrayType() || 4611 // -- functions, which have parameters of given types [...]; 4612 isFunctionType() || 4613 // -- pointers to void or objects or functions [...]; 4614 isPointerType() || 4615 // -- references to objects or functions of a given type. [...] 4616 isReferenceType() || 4617 // -- classes containing a sequence of objects of various types, [...]; 4618 isRecordType() || 4619 // -- unions, which ar classes capable of containing objects of different types at different times; 4620 isUnionType() || 4621 // -- enumerations, which comprise a set of named constant values. [...]; 4622 isEnumeralType() || 4623 // -- pointers to non-static class members, [...]. 4624 isMemberPointerType(); 4625} 4626 4627inline bool Type::isFunctionType() const { 4628 return isa<FunctionType>(CanonicalType); 4629} 4630inline bool Type::isPointerType() const { 4631 return isa<PointerType>(CanonicalType); 4632} 4633inline bool Type::isAnyPointerType() const { 4634 return isPointerType() || isObjCObjectPointerType(); 4635} 4636inline bool Type::isBlockPointerType() const { 4637 return isa<BlockPointerType>(CanonicalType); 4638} 4639inline bool Type::isReferenceType() const { 4640 return isa<ReferenceType>(CanonicalType); 4641} 4642inline bool Type::isLValueReferenceType() const { 4643 return isa<LValueReferenceType>(CanonicalType); 4644} 4645inline bool Type::isRValueReferenceType() const { 4646 return isa<RValueReferenceType>(CanonicalType); 4647} 4648inline bool Type::isFunctionPointerType() const { 4649 if (const PointerType *T = getAs<PointerType>()) 4650 return T->getPointeeType()->isFunctionType(); 4651 else 4652 return false; 4653} 4654inline bool Type::isMemberPointerType() const { 4655 return isa<MemberPointerType>(CanonicalType); 4656} 4657inline bool Type::isMemberFunctionPointerType() const { 4658 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4659 return T->isMemberFunctionPointer(); 4660 else 4661 return false; 4662} 4663inline bool Type::isMemberDataPointerType() const { 4664 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4665 return T->isMemberDataPointer(); 4666 else 4667 return false; 4668} 4669inline bool Type::isArrayType() const { 4670 return isa<ArrayType>(CanonicalType); 4671} 4672inline bool Type::isConstantArrayType() const { 4673 return isa<ConstantArrayType>(CanonicalType); 4674} 4675inline bool Type::isIncompleteArrayType() const { 4676 return isa<IncompleteArrayType>(CanonicalType); 4677} 4678inline bool Type::isVariableArrayType() const { 4679 return isa<VariableArrayType>(CanonicalType); 4680} 4681inline bool Type::isDependentSizedArrayType() const { 4682 return isa<DependentSizedArrayType>(CanonicalType); 4683} 4684inline bool Type::isBuiltinType() const { 4685 return isa<BuiltinType>(CanonicalType); 4686} 4687inline bool Type::isRecordType() const { 4688 return isa<RecordType>(CanonicalType); 4689} 4690inline bool Type::isEnumeralType() const { 4691 return isa<EnumType>(CanonicalType); 4692} 4693inline bool Type::isAnyComplexType() const { 4694 return isa<ComplexType>(CanonicalType); 4695} 4696inline bool Type::isVectorType() const { 4697 return isa<VectorType>(CanonicalType); 4698} 4699inline bool Type::isExtVectorType() const { 4700 return isa<ExtVectorType>(CanonicalType); 4701} 4702inline bool Type::isObjCObjectPointerType() const { 4703 return isa<ObjCObjectPointerType>(CanonicalType); 4704} 4705inline bool Type::isObjCObjectType() const { 4706 return isa<ObjCObjectType>(CanonicalType); 4707} 4708inline bool Type::isObjCObjectOrInterfaceType() const { 4709 return isa<ObjCInterfaceType>(CanonicalType) || 4710 isa<ObjCObjectType>(CanonicalType); 4711} 4712inline bool Type::isAtomicType() const { 4713 return isa<AtomicType>(CanonicalType); 4714} 4715 4716inline bool Type::isObjCQualifiedIdType() const { 4717 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4718 return OPT->isObjCQualifiedIdType(); 4719 return false; 4720} 4721inline bool Type::isObjCQualifiedClassType() const { 4722 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4723 return OPT->isObjCQualifiedClassType(); 4724 return false; 4725} 4726inline bool Type::isObjCIdType() const { 4727 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4728 return OPT->isObjCIdType(); 4729 return false; 4730} 4731inline bool Type::isObjCClassType() const { 4732 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4733 return OPT->isObjCClassType(); 4734 return false; 4735} 4736inline bool Type::isObjCSelType() const { 4737 if (const PointerType *OPT = getAs<PointerType>()) 4738 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 4739 return false; 4740} 4741inline bool Type::isObjCBuiltinType() const { 4742 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 4743} 4744inline bool Type::isTemplateTypeParmType() const { 4745 return isa<TemplateTypeParmType>(CanonicalType); 4746} 4747 4748inline bool Type::isSpecificBuiltinType(unsigned K) const { 4749 if (const BuiltinType *BT = getAs<BuiltinType>()) 4750 if (BT->getKind() == (BuiltinType::Kind) K) 4751 return true; 4752 return false; 4753} 4754 4755inline bool Type::isPlaceholderType() const { 4756 if (const BuiltinType *BT = getAs<BuiltinType>()) 4757 return BT->isPlaceholderType(); 4758 return false; 4759} 4760 4761inline bool Type::isSpecificPlaceholderType(unsigned K) const { 4762 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4763 return (BT->getKind() == (BuiltinType::Kind) K); 4764 return false; 4765} 4766 4767/// \brief Determines whether this is a type for which one can define 4768/// an overloaded operator. 4769inline bool Type::isOverloadableType() const { 4770 return isDependentType() || isRecordType() || isEnumeralType(); 4771} 4772 4773/// \brief Determines whether this type can decay to a pointer type. 4774inline bool Type::canDecayToPointerType() const { 4775 return isFunctionType() || isArrayType(); 4776} 4777 4778inline bool Type::hasPointerRepresentation() const { 4779 return (isPointerType() || isReferenceType() || isBlockPointerType() || 4780 isObjCObjectPointerType() || isNullPtrType()); 4781} 4782 4783inline bool Type::hasObjCPointerRepresentation() const { 4784 return isObjCObjectPointerType(); 4785} 4786 4787inline const Type *Type::getBaseElementTypeUnsafe() const { 4788 const Type *type = this; 4789 while (const ArrayType *arrayType = type->getAsArrayTypeUnsafe()) 4790 type = arrayType->getElementType().getTypePtr(); 4791 return type; 4792} 4793 4794/// Insertion operator for diagnostics. This allows sending QualType's into a 4795/// diagnostic with <<. 4796inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 4797 QualType T) { 4798 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 4799 DiagnosticsEngine::ak_qualtype); 4800 return DB; 4801} 4802 4803/// Insertion operator for partial diagnostics. This allows sending QualType's 4804/// into a diagnostic with <<. 4805inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, 4806 QualType T) { 4807 PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 4808 DiagnosticsEngine::ak_qualtype); 4809 return PD; 4810} 4811 4812// Helper class template that is used by Type::getAs to ensure that one does 4813// not try to look through a qualified type to get to an array type. 4814template<typename T, 4815 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 4816 llvm::is_base_of<ArrayType, T>::value)> 4817struct ArrayType_cannot_be_used_with_getAs { }; 4818 4819template<typename T> 4820struct ArrayType_cannot_be_used_with_getAs<T, true>; 4821 4822/// Member-template getAs<specific type>'. 4823template <typename T> const T *Type::getAs() const { 4824 ArrayType_cannot_be_used_with_getAs<T> at; 4825 (void)at; 4826 4827 // If this is directly a T type, return it. 4828 if (const T *Ty = dyn_cast<T>(this)) 4829 return Ty; 4830 4831 // If the canonical form of this type isn't the right kind, reject it. 4832 if (!isa<T>(CanonicalType)) 4833 return 0; 4834 4835 // If this is a typedef for the type, strip the typedef off without 4836 // losing all typedef information. 4837 return cast<T>(getUnqualifiedDesugaredType()); 4838} 4839 4840inline const ArrayType *Type::getAsArrayTypeUnsafe() const { 4841 // If this is directly an array type, return it. 4842 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) 4843 return arr; 4844 4845 // If the canonical form of this type isn't the right kind, reject it. 4846 if (!isa<ArrayType>(CanonicalType)) 4847 return 0; 4848 4849 // If this is a typedef for the type, strip the typedef off without 4850 // losing all typedef information. 4851 return cast<ArrayType>(getUnqualifiedDesugaredType()); 4852} 4853 4854template <typename T> const T *Type::castAs() const { 4855 ArrayType_cannot_be_used_with_getAs<T> at; 4856 (void) at; 4857 4858 assert(isa<T>(CanonicalType)); 4859 if (const T *ty = dyn_cast<T>(this)) return ty; 4860 return cast<T>(getUnqualifiedDesugaredType()); 4861} 4862 4863inline const ArrayType *Type::castAsArrayTypeUnsafe() const { 4864 assert(isa<ArrayType>(CanonicalType)); 4865 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) return arr; 4866 return cast<ArrayType>(getUnqualifiedDesugaredType()); 4867} 4868 4869} // end namespace clang 4870 4871#endif 4872