Type.h revision d07cc36c71558b62889691184dd04655a33fd12a
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 /// 1328 /// \brief Def If non-NULL, and the type refers to some kind of declaration 1329 /// that can be completed (such as a C struct, C++ class, or Objective-C 1330 /// class), will be set to the declaration. 1331 bool isIncompleteType(NamedDecl **Def = 0) const; 1332 1333 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 1334 /// type, in other words, not a function type. 1335 bool isIncompleteOrObjectType() const { 1336 return !isFunctionType(); 1337 } 1338 1339 /// \brief Determine whether this type is an object type. 1340 bool isObjectType() const { 1341 // C++ [basic.types]p8: 1342 // An object type is a (possibly cv-qualified) type that is not a 1343 // function type, not a reference type, and not a void type. 1344 return !isReferenceType() && !isFunctionType() && !isVoidType(); 1345 } 1346 1347 /// isLiteralType - Return true if this is a literal type 1348 /// (C++0x [basic.types]p10) 1349 bool isLiteralType() const; 1350 1351 /// \brief Test if this type is a standard-layout type. 1352 /// (C++0x [basic.type]p9) 1353 bool isStandardLayoutType() const; 1354 1355 /// Helper methods to distinguish type categories. All type predicates 1356 /// operate on the canonical type, ignoring typedefs and qualifiers. 1357 1358 /// isBuiltinType - returns true if the type is a builtin type. 1359 bool isBuiltinType() const; 1360 1361 /// isSpecificBuiltinType - Test for a particular builtin type. 1362 bool isSpecificBuiltinType(unsigned K) const; 1363 1364 /// isPlaceholderType - Test for a type which does not represent an 1365 /// actual type-system type but is instead used as a placeholder for 1366 /// various convenient purposes within Clang. All such types are 1367 /// BuiltinTypes. 1368 bool isPlaceholderType() const; 1369 const BuiltinType *getAsPlaceholderType() const; 1370 1371 /// isSpecificPlaceholderType - Test for a specific placeholder type. 1372 bool isSpecificPlaceholderType(unsigned K) const; 1373 1374 /// isNonOverloadPlaceholderType - Test for a placeholder type 1375 /// other than Overload; see BuiltinType::isNonOverloadPlaceholderType. 1376 bool isNonOverloadPlaceholderType() const; 1377 1378 /// isIntegerType() does *not* include complex integers (a GCC extension). 1379 /// isComplexIntegerType() can be used to test for complex integers. 1380 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 1381 bool isEnumeralType() const; 1382 bool isBooleanType() const; 1383 bool isCharType() const; 1384 bool isWideCharType() const; 1385 bool isChar16Type() const; 1386 bool isChar32Type() const; 1387 bool isAnyCharacterType() const; 1388 bool isIntegralType(ASTContext &Ctx) const; 1389 1390 /// \brief Determine whether this type is an integral or enumeration type. 1391 bool isIntegralOrEnumerationType() const; 1392 /// \brief Determine whether this type is an integral or unscoped enumeration 1393 /// type. 1394 bool isIntegralOrUnscopedEnumerationType() const; 1395 1396 /// Floating point categories. 1397 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 1398 /// isComplexType() does *not* include complex integers (a GCC extension). 1399 /// isComplexIntegerType() can be used to test for complex integers. 1400 bool isComplexType() const; // C99 6.2.5p11 (complex) 1401 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 1402 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 1403 bool isHalfType() const; // OpenCL 6.1.1.1, NEON (IEEE 754-2008 half) 1404 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 1405 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 1406 bool isVoidType() const; // C99 6.2.5p19 1407 bool isDerivedType() const; // C99 6.2.5p20 1408 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 1409 bool isAggregateType() const; 1410 bool isFundamentalType() const; 1411 bool isCompoundType() const; 1412 1413 // Type Predicates: Check to see if this type is structurally the specified 1414 // type, ignoring typedefs and qualifiers. 1415 bool isFunctionType() const; 1416 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 1417 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 1418 bool isPointerType() const; 1419 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 1420 bool isBlockPointerType() const; 1421 bool isVoidPointerType() const; 1422 bool isReferenceType() const; 1423 bool isLValueReferenceType() const; 1424 bool isRValueReferenceType() const; 1425 bool isFunctionPointerType() const; 1426 bool isMemberPointerType() const; 1427 bool isMemberFunctionPointerType() const; 1428 bool isMemberDataPointerType() const; 1429 bool isArrayType() const; 1430 bool isConstantArrayType() const; 1431 bool isIncompleteArrayType() const; 1432 bool isVariableArrayType() const; 1433 bool isDependentSizedArrayType() const; 1434 bool isRecordType() const; 1435 bool isClassType() const; 1436 bool isStructureType() const; 1437 bool isStructureOrClassType() const; 1438 bool isUnionType() const; 1439 bool isComplexIntegerType() const; // GCC _Complex integer type. 1440 bool isVectorType() const; // GCC vector type. 1441 bool isExtVectorType() const; // Extended vector type. 1442 bool isObjCObjectPointerType() const; // pointer to ObjC object 1443 bool isObjCRetainableType() const; // ObjC object or block pointer 1444 bool isObjCLifetimeType() const; // (array of)* retainable type 1445 bool isObjCIndirectLifetimeType() const; // (pointer to)* lifetime type 1446 bool isObjCNSObjectType() const; // __attribute__((NSObject)) 1447 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 1448 // for the common case. 1449 bool isObjCObjectType() const; // NSString or typeof(*(id)0) 1450 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 1451 bool isObjCQualifiedIdType() const; // id<foo> 1452 bool isObjCQualifiedClassType() const; // Class<foo> 1453 bool isObjCObjectOrInterfaceType() const; 1454 bool isObjCIdType() const; // id 1455 bool isObjCClassType() const; // Class 1456 bool isObjCSelType() const; // Class 1457 bool isObjCBuiltinType() const; // 'id' or 'Class' 1458 bool isObjCARCBridgableType() const; 1459 bool isCARCBridgableType() const; 1460 bool isTemplateTypeParmType() const; // C++ template type parameter 1461 bool isNullPtrType() const; // C++0x nullptr_t 1462 bool isAtomicType() const; // C11 _Atomic() 1463 1464 /// Determines if this type, which must satisfy 1465 /// isObjCLifetimeType(), is implicitly __unsafe_unretained rather 1466 /// than implicitly __strong. 1467 bool isObjCARCImplicitlyUnretainedType() const; 1468 1469 /// Return the implicit lifetime for this type, which must not be dependent. 1470 Qualifiers::ObjCLifetime getObjCARCImplicitLifetime() const; 1471 1472 enum ScalarTypeKind { 1473 STK_CPointer, 1474 STK_BlockPointer, 1475 STK_ObjCObjectPointer, 1476 STK_MemberPointer, 1477 STK_Bool, 1478 STK_Integral, 1479 STK_Floating, 1480 STK_IntegralComplex, 1481 STK_FloatingComplex 1482 }; 1483 /// getScalarTypeKind - Given that this is a scalar type, classify it. 1484 ScalarTypeKind getScalarTypeKind() const; 1485 1486 /// isDependentType - Whether this type is a dependent type, meaning 1487 /// that its definition somehow depends on a template parameter 1488 /// (C++ [temp.dep.type]). 1489 bool isDependentType() const { return TypeBits.Dependent; } 1490 1491 /// \brief Determine whether this type is an instantiation-dependent type, 1492 /// meaning that the type involves a template parameter (even if the 1493 /// definition does not actually depend on the type substituted for that 1494 /// template parameter). 1495 bool isInstantiationDependentType() const { 1496 return TypeBits.InstantiationDependent; 1497 } 1498 1499 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 1500 bool isVariablyModifiedType() const { return TypeBits.VariablyModified; } 1501 1502 /// \brief Whether this type involves a variable-length array type 1503 /// with a definite size. 1504 bool hasSizedVLAType() const; 1505 1506 /// \brief Whether this type is or contains a local or unnamed type. 1507 bool hasUnnamedOrLocalType() const; 1508 1509 bool isOverloadableType() const; 1510 1511 /// \brief Determine wither this type is a C++ elaborated-type-specifier. 1512 bool isElaboratedTypeSpecifier() const; 1513 1514 bool canDecayToPointerType() const; 1515 1516 /// hasPointerRepresentation - Whether this type is represented 1517 /// natively as a pointer; this includes pointers, references, block 1518 /// pointers, and Objective-C interface, qualified id, and qualified 1519 /// interface types, as well as nullptr_t. 1520 bool hasPointerRepresentation() const; 1521 1522 /// hasObjCPointerRepresentation - Whether this type can represent 1523 /// an objective pointer type for the purpose of GC'ability 1524 bool hasObjCPointerRepresentation() const; 1525 1526 /// \brief Determine whether this type has an integer representation 1527 /// of some sort, e.g., it is an integer type or a vector. 1528 bool hasIntegerRepresentation() const; 1529 1530 /// \brief Determine whether this type has an signed integer representation 1531 /// of some sort, e.g., it is an signed integer type or a vector. 1532 bool hasSignedIntegerRepresentation() const; 1533 1534 /// \brief Determine whether this type has an unsigned integer representation 1535 /// of some sort, e.g., it is an unsigned integer type or a vector. 1536 bool hasUnsignedIntegerRepresentation() const; 1537 1538 /// \brief Determine whether this type has a floating-point representation 1539 /// of some sort, e.g., it is a floating-point type or a vector thereof. 1540 bool hasFloatingRepresentation() const; 1541 1542 // Type Checking Functions: Check to see if this type is structurally the 1543 // specified type, ignoring typedefs and qualifiers, and return a pointer to 1544 // the best type we can. 1545 const RecordType *getAsStructureType() const; 1546 /// NOTE: getAs*ArrayType are methods on ASTContext. 1547 const RecordType *getAsUnionType() const; 1548 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 1549 // The following is a convenience method that returns an ObjCObjectPointerType 1550 // for object declared using an interface. 1551 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 1552 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 1553 const ObjCObjectPointerType *getAsObjCQualifiedClassType() const; 1554 const ObjCObjectType *getAsObjCQualifiedInterfaceType() const; 1555 const CXXRecordDecl *getCXXRecordDeclForPointerType() const; 1556 1557 /// \brief Retrieves the CXXRecordDecl that this type refers to, either 1558 /// because the type is a RecordType or because it is the injected-class-name 1559 /// type of a class template or class template partial specialization. 1560 CXXRecordDecl *getAsCXXRecordDecl() const; 1561 1562 /// \brief Get the AutoType whose type will be deduced for a variable with 1563 /// an initializer of this type. This looks through declarators like pointer 1564 /// types, but not through decltype or typedefs. 1565 AutoType *getContainedAutoType() const; 1566 1567 /// Member-template getAs<specific type>'. Look through sugar for 1568 /// an instance of <specific type>. This scheme will eventually 1569 /// replace the specific getAsXXXX methods above. 1570 /// 1571 /// There are some specializations of this member template listed 1572 /// immediately following this class. 1573 template <typename T> const T *getAs() const; 1574 1575 /// A variant of getAs<> for array types which silently discards 1576 /// qualifiers from the outermost type. 1577 const ArrayType *getAsArrayTypeUnsafe() const; 1578 1579 /// Member-template castAs<specific type>. Look through sugar for 1580 /// the underlying instance of <specific type>. 1581 /// 1582 /// This method has the same relationship to getAs<T> as cast<T> has 1583 /// to dyn_cast<T>; which is to say, the underlying type *must* 1584 /// have the intended type, and this method will never return null. 1585 template <typename T> const T *castAs() const; 1586 1587 /// A variant of castAs<> for array type which silently discards 1588 /// qualifiers from the outermost type. 1589 const ArrayType *castAsArrayTypeUnsafe() const; 1590 1591 /// getBaseElementTypeUnsafe - Get the base element type of this 1592 /// type, potentially discarding type qualifiers. This method 1593 /// should never be used when type qualifiers are meaningful. 1594 const Type *getBaseElementTypeUnsafe() const; 1595 1596 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 1597 /// element type of the array, potentially with type qualifiers missing. 1598 /// This method should never be used when type qualifiers are meaningful. 1599 const Type *getArrayElementTypeNoTypeQual() const; 1600 1601 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 1602 /// pointer, this returns the respective pointee. 1603 QualType getPointeeType() const; 1604 1605 /// getUnqualifiedDesugaredType() - Return the specified type with 1606 /// any "sugar" removed from the type, removing any typedefs, 1607 /// typeofs, etc., as well as any qualifiers. 1608 const Type *getUnqualifiedDesugaredType() const; 1609 1610 /// More type predicates useful for type checking/promotion 1611 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 1612 1613 /// isSignedIntegerType - Return true if this is an integer type that is 1614 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 1615 /// or an enum decl which has a signed representation. 1616 bool isSignedIntegerType() const; 1617 1618 /// isUnsignedIntegerType - Return true if this is an integer type that is 1619 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], 1620 /// or an enum decl which has an unsigned representation. 1621 bool isUnsignedIntegerType() const; 1622 1623 /// Determines whether this is an integer type that is signed or an 1624 /// enumeration types whose underlying type is a signed integer type. 1625 bool isSignedIntegerOrEnumerationType() const; 1626 1627 /// Determines whether this is an integer type that is unsigned or an 1628 /// enumeration types whose underlying type is a unsigned integer type. 1629 bool isUnsignedIntegerOrEnumerationType() const; 1630 1631 /// isConstantSizeType - Return true if this is not a variable sized type, 1632 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 1633 /// incomplete types. 1634 bool isConstantSizeType() const; 1635 1636 /// isSpecifierType - Returns true if this type can be represented by some 1637 /// set of type specifiers. 1638 bool isSpecifierType() const; 1639 1640 /// \brief Determine the linkage of this type. 1641 Linkage getLinkage() const; 1642 1643 /// \brief Determine the visibility of this type. 1644 Visibility getVisibility() const; 1645 1646 /// \brief Determine the linkage and visibility of this type. 1647 std::pair<Linkage,Visibility> getLinkageAndVisibility() const; 1648 1649 /// \brief Note that the linkage is no longer known. 1650 void ClearLinkageCache(); 1651 1652 const char *getTypeClassName() const; 1653 1654 QualType getCanonicalTypeInternal() const { 1655 return CanonicalType; 1656 } 1657 CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h 1658 void dump() const; 1659 1660 static bool classof(const Type *) { return true; } 1661 1662 friend class ASTReader; 1663 friend class ASTWriter; 1664}; 1665 1666template <> inline const TypedefType *Type::getAs() const { 1667 return dyn_cast<TypedefType>(this); 1668} 1669 1670// We can do canonical leaf types faster, because we don't have to 1671// worry about preserving child type decoration. 1672#define TYPE(Class, Base) 1673#define LEAF_TYPE(Class) \ 1674template <> inline const Class##Type *Type::getAs() const { \ 1675 return dyn_cast<Class##Type>(CanonicalType); \ 1676} \ 1677template <> inline const Class##Type *Type::castAs() const { \ 1678 return cast<Class##Type>(CanonicalType); \ 1679} 1680#include "clang/AST/TypeNodes.def" 1681 1682 1683/// BuiltinType - This class is used for builtin types like 'int'. Builtin 1684/// types are always canonical and have a literal name field. 1685class BuiltinType : public Type { 1686public: 1687 enum Kind { 1688#define BUILTIN_TYPE(Id, SingletonId) Id, 1689#define LAST_BUILTIN_TYPE(Id) LastKind = Id 1690#include "clang/AST/BuiltinTypes.def" 1691 }; 1692 1693public: 1694 BuiltinType(Kind K) 1695 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent), 1696 /*InstantiationDependent=*/(K == Dependent), 1697 /*VariablyModified=*/false, 1698 /*Unexpanded paramter pack=*/false) { 1699 BuiltinTypeBits.Kind = K; 1700 } 1701 1702 Kind getKind() const { return static_cast<Kind>(BuiltinTypeBits.Kind); } 1703 const char *getName(const PrintingPolicy &Policy) const; 1704 1705 bool isSugared() const { return false; } 1706 QualType desugar() const { return QualType(this, 0); } 1707 1708 bool isInteger() const { 1709 return getKind() >= Bool && getKind() <= Int128; 1710 } 1711 1712 bool isSignedInteger() const { 1713 return getKind() >= Char_S && getKind() <= Int128; 1714 } 1715 1716 bool isUnsignedInteger() const { 1717 return getKind() >= Bool && getKind() <= UInt128; 1718 } 1719 1720 bool isFloatingPoint() const { 1721 return getKind() >= Half && getKind() <= LongDouble; 1722 } 1723 1724 /// Determines whether the given kind corresponds to a placeholder type. 1725 static bool isPlaceholderTypeKind(Kind K) { 1726 return K >= Overload; 1727 } 1728 1729 /// Determines whether this type is a placeholder type, i.e. a type 1730 /// which cannot appear in arbitrary positions in a fully-formed 1731 /// expression. 1732 bool isPlaceholderType() const { 1733 return isPlaceholderTypeKind(getKind()); 1734 } 1735 1736 /// Determines whether this type is a placeholder type other than 1737 /// Overload. Most placeholder types require only syntactic 1738 /// information about their context in order to be resolved (e.g. 1739 /// whether it is a call expression), which means they can (and 1740 /// should) be resolved in an earlier "phase" of analysis. 1741 /// Overload expressions sometimes pick up further information 1742 /// from their context, like whether the context expects a 1743 /// specific function-pointer type, and so frequently need 1744 /// special treatment. 1745 bool isNonOverloadPlaceholderType() const { 1746 return getKind() > Overload; 1747 } 1748 1749 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1750 static bool classof(const BuiltinType *) { return true; } 1751}; 1752 1753/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1754/// types (_Complex float etc) as well as the GCC integer complex extensions. 1755/// 1756class ComplexType : public Type, public llvm::FoldingSetNode { 1757 QualType ElementType; 1758 ComplexType(QualType Element, QualType CanonicalPtr) : 1759 Type(Complex, CanonicalPtr, Element->isDependentType(), 1760 Element->isInstantiationDependentType(), 1761 Element->isVariablyModifiedType(), 1762 Element->containsUnexpandedParameterPack()), 1763 ElementType(Element) { 1764 } 1765 friend class ASTContext; // ASTContext creates these. 1766 1767public: 1768 QualType getElementType() const { return ElementType; } 1769 1770 bool isSugared() const { return false; } 1771 QualType desugar() const { return QualType(this, 0); } 1772 1773 void Profile(llvm::FoldingSetNodeID &ID) { 1774 Profile(ID, getElementType()); 1775 } 1776 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1777 ID.AddPointer(Element.getAsOpaquePtr()); 1778 } 1779 1780 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1781 static bool classof(const ComplexType *) { return true; } 1782}; 1783 1784/// ParenType - Sugar for parentheses used when specifying types. 1785/// 1786class ParenType : public Type, public llvm::FoldingSetNode { 1787 QualType Inner; 1788 1789 ParenType(QualType InnerType, QualType CanonType) : 1790 Type(Paren, CanonType, InnerType->isDependentType(), 1791 InnerType->isInstantiationDependentType(), 1792 InnerType->isVariablyModifiedType(), 1793 InnerType->containsUnexpandedParameterPack()), 1794 Inner(InnerType) { 1795 } 1796 friend class ASTContext; // ASTContext creates these. 1797 1798public: 1799 1800 QualType getInnerType() const { return Inner; } 1801 1802 bool isSugared() const { return true; } 1803 QualType desugar() const { return getInnerType(); } 1804 1805 void Profile(llvm::FoldingSetNodeID &ID) { 1806 Profile(ID, getInnerType()); 1807 } 1808 static void Profile(llvm::FoldingSetNodeID &ID, QualType Inner) { 1809 Inner.Profile(ID); 1810 } 1811 1812 static bool classof(const Type *T) { return T->getTypeClass() == Paren; } 1813 static bool classof(const ParenType *) { return true; } 1814}; 1815 1816/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1817/// 1818class PointerType : public Type, public llvm::FoldingSetNode { 1819 QualType PointeeType; 1820 1821 PointerType(QualType Pointee, QualType CanonicalPtr) : 1822 Type(Pointer, CanonicalPtr, Pointee->isDependentType(), 1823 Pointee->isInstantiationDependentType(), 1824 Pointee->isVariablyModifiedType(), 1825 Pointee->containsUnexpandedParameterPack()), 1826 PointeeType(Pointee) { 1827 } 1828 friend class ASTContext; // ASTContext creates these. 1829 1830public: 1831 1832 QualType getPointeeType() const { return PointeeType; } 1833 1834 bool isSugared() const { return false; } 1835 QualType desugar() const { return QualType(this, 0); } 1836 1837 void Profile(llvm::FoldingSetNodeID &ID) { 1838 Profile(ID, getPointeeType()); 1839 } 1840 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1841 ID.AddPointer(Pointee.getAsOpaquePtr()); 1842 } 1843 1844 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1845 static bool classof(const PointerType *) { return true; } 1846}; 1847 1848/// BlockPointerType - pointer to a block type. 1849/// This type is to represent types syntactically represented as 1850/// "void (^)(int)", etc. Pointee is required to always be a function type. 1851/// 1852class BlockPointerType : public Type, public llvm::FoldingSetNode { 1853 QualType PointeeType; // Block is some kind of pointer type 1854 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1855 Type(BlockPointer, CanonicalCls, Pointee->isDependentType(), 1856 Pointee->isInstantiationDependentType(), 1857 Pointee->isVariablyModifiedType(), 1858 Pointee->containsUnexpandedParameterPack()), 1859 PointeeType(Pointee) { 1860 } 1861 friend class ASTContext; // ASTContext creates these. 1862 1863public: 1864 1865 // Get the pointee type. Pointee is required to always be a function type. 1866 QualType getPointeeType() const { return PointeeType; } 1867 1868 bool isSugared() const { return false; } 1869 QualType desugar() const { return QualType(this, 0); } 1870 1871 void Profile(llvm::FoldingSetNodeID &ID) { 1872 Profile(ID, getPointeeType()); 1873 } 1874 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1875 ID.AddPointer(Pointee.getAsOpaquePtr()); 1876 } 1877 1878 static bool classof(const Type *T) { 1879 return T->getTypeClass() == BlockPointer; 1880 } 1881 static bool classof(const BlockPointerType *) { return true; } 1882}; 1883 1884/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 1885/// 1886class ReferenceType : public Type, public llvm::FoldingSetNode { 1887 QualType PointeeType; 1888 1889protected: 1890 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 1891 bool SpelledAsLValue) : 1892 Type(tc, CanonicalRef, Referencee->isDependentType(), 1893 Referencee->isInstantiationDependentType(), 1894 Referencee->isVariablyModifiedType(), 1895 Referencee->containsUnexpandedParameterPack()), 1896 PointeeType(Referencee) 1897 { 1898 ReferenceTypeBits.SpelledAsLValue = SpelledAsLValue; 1899 ReferenceTypeBits.InnerRef = Referencee->isReferenceType(); 1900 } 1901 1902public: 1903 bool isSpelledAsLValue() const { return ReferenceTypeBits.SpelledAsLValue; } 1904 bool isInnerRef() const { return ReferenceTypeBits.InnerRef; } 1905 1906 QualType getPointeeTypeAsWritten() const { return PointeeType; } 1907 QualType getPointeeType() const { 1908 // FIXME: this might strip inner qualifiers; okay? 1909 const ReferenceType *T = this; 1910 while (T->isInnerRef()) 1911 T = T->PointeeType->castAs<ReferenceType>(); 1912 return T->PointeeType; 1913 } 1914 1915 void Profile(llvm::FoldingSetNodeID &ID) { 1916 Profile(ID, PointeeType, isSpelledAsLValue()); 1917 } 1918 static void Profile(llvm::FoldingSetNodeID &ID, 1919 QualType Referencee, 1920 bool SpelledAsLValue) { 1921 ID.AddPointer(Referencee.getAsOpaquePtr()); 1922 ID.AddBoolean(SpelledAsLValue); 1923 } 1924 1925 static bool classof(const Type *T) { 1926 return T->getTypeClass() == LValueReference || 1927 T->getTypeClass() == RValueReference; 1928 } 1929 static bool classof(const ReferenceType *) { return true; } 1930}; 1931 1932/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 1933/// 1934class LValueReferenceType : public ReferenceType { 1935 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 1936 bool SpelledAsLValue) : 1937 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 1938 {} 1939 friend class ASTContext; // ASTContext creates these 1940public: 1941 bool isSugared() const { return false; } 1942 QualType desugar() const { return QualType(this, 0); } 1943 1944 static bool classof(const Type *T) { 1945 return T->getTypeClass() == LValueReference; 1946 } 1947 static bool classof(const LValueReferenceType *) { return true; } 1948}; 1949 1950/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 1951/// 1952class RValueReferenceType : public ReferenceType { 1953 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 1954 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 1955 } 1956 friend class ASTContext; // ASTContext creates these 1957public: 1958 bool isSugared() const { return false; } 1959 QualType desugar() const { return QualType(this, 0); } 1960 1961 static bool classof(const Type *T) { 1962 return T->getTypeClass() == RValueReference; 1963 } 1964 static bool classof(const RValueReferenceType *) { return true; } 1965}; 1966 1967/// MemberPointerType - C++ 8.3.3 - Pointers to members 1968/// 1969class MemberPointerType : public Type, public llvm::FoldingSetNode { 1970 QualType PointeeType; 1971 /// The class of which the pointee is a member. Must ultimately be a 1972 /// RecordType, but could be a typedef or a template parameter too. 1973 const Type *Class; 1974 1975 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 1976 Type(MemberPointer, CanonicalPtr, 1977 Cls->isDependentType() || Pointee->isDependentType(), 1978 (Cls->isInstantiationDependentType() || 1979 Pointee->isInstantiationDependentType()), 1980 Pointee->isVariablyModifiedType(), 1981 (Cls->containsUnexpandedParameterPack() || 1982 Pointee->containsUnexpandedParameterPack())), 1983 PointeeType(Pointee), Class(Cls) { 1984 } 1985 friend class ASTContext; // ASTContext creates these. 1986 1987public: 1988 QualType getPointeeType() const { return PointeeType; } 1989 1990 /// Returns true if the member type (i.e. the pointee type) is a 1991 /// function type rather than a data-member type. 1992 bool isMemberFunctionPointer() const { 1993 return PointeeType->isFunctionProtoType(); 1994 } 1995 1996 /// Returns true if the member type (i.e. the pointee type) is a 1997 /// data type rather than a function type. 1998 bool isMemberDataPointer() const { 1999 return !PointeeType->isFunctionProtoType(); 2000 } 2001 2002 const Type *getClass() const { return Class; } 2003 2004 bool isSugared() const { return false; } 2005 QualType desugar() const { return QualType(this, 0); } 2006 2007 void Profile(llvm::FoldingSetNodeID &ID) { 2008 Profile(ID, getPointeeType(), getClass()); 2009 } 2010 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 2011 const Type *Class) { 2012 ID.AddPointer(Pointee.getAsOpaquePtr()); 2013 ID.AddPointer(Class); 2014 } 2015 2016 static bool classof(const Type *T) { 2017 return T->getTypeClass() == MemberPointer; 2018 } 2019 static bool classof(const MemberPointerType *) { return true; } 2020}; 2021 2022/// ArrayType - C99 6.7.5.2 - Array Declarators. 2023/// 2024class ArrayType : public Type, public llvm::FoldingSetNode { 2025public: 2026 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 2027 /// an array with a static size (e.g. int X[static 4]), or an array 2028 /// with a star size (e.g. int X[*]). 2029 /// 'static' is only allowed on function parameters. 2030 enum ArraySizeModifier { 2031 Normal, Static, Star 2032 }; 2033private: 2034 /// ElementType - The element type of the array. 2035 QualType ElementType; 2036 2037protected: 2038 // C++ [temp.dep.type]p1: 2039 // A type is dependent if it is... 2040 // - an array type constructed from any dependent type or whose 2041 // size is specified by a constant expression that is 2042 // value-dependent, 2043 ArrayType(TypeClass tc, QualType et, QualType can, 2044 ArraySizeModifier sm, unsigned tq, 2045 bool ContainsUnexpandedParameterPack) 2046 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray, 2047 et->isInstantiationDependentType() || tc == DependentSizedArray, 2048 (tc == VariableArray || et->isVariablyModifiedType()), 2049 ContainsUnexpandedParameterPack), 2050 ElementType(et) { 2051 ArrayTypeBits.IndexTypeQuals = tq; 2052 ArrayTypeBits.SizeModifier = sm; 2053 } 2054 2055 friend class ASTContext; // ASTContext creates these. 2056 2057public: 2058 QualType getElementType() const { return ElementType; } 2059 ArraySizeModifier getSizeModifier() const { 2060 return ArraySizeModifier(ArrayTypeBits.SizeModifier); 2061 } 2062 Qualifiers getIndexTypeQualifiers() const { 2063 return Qualifiers::fromCVRMask(getIndexTypeCVRQualifiers()); 2064 } 2065 unsigned getIndexTypeCVRQualifiers() const { 2066 return ArrayTypeBits.IndexTypeQuals; 2067 } 2068 2069 static bool classof(const Type *T) { 2070 return T->getTypeClass() == ConstantArray || 2071 T->getTypeClass() == VariableArray || 2072 T->getTypeClass() == IncompleteArray || 2073 T->getTypeClass() == DependentSizedArray; 2074 } 2075 static bool classof(const ArrayType *) { return true; } 2076}; 2077 2078/// ConstantArrayType - This class represents the canonical version of 2079/// C arrays with a specified constant size. For example, the canonical 2080/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 2081/// type is 'int' and the size is 404. 2082class ConstantArrayType : public ArrayType { 2083 llvm::APInt Size; // Allows us to unique the type. 2084 2085 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 2086 ArraySizeModifier sm, unsigned tq) 2087 : ArrayType(ConstantArray, et, can, sm, tq, 2088 et->containsUnexpandedParameterPack()), 2089 Size(size) {} 2090protected: 2091 ConstantArrayType(TypeClass tc, QualType et, QualType can, 2092 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 2093 : ArrayType(tc, et, can, sm, tq, et->containsUnexpandedParameterPack()), 2094 Size(size) {} 2095 friend class ASTContext; // ASTContext creates these. 2096public: 2097 const llvm::APInt &getSize() const { return Size; } 2098 bool isSugared() const { return false; } 2099 QualType desugar() const { return QualType(this, 0); } 2100 2101 2102 /// \brief Determine the number of bits required to address a member of 2103 // an array with the given element type and number of elements. 2104 static unsigned getNumAddressingBits(ASTContext &Context, 2105 QualType ElementType, 2106 const llvm::APInt &NumElements); 2107 2108 /// \brief Determine the maximum number of active bits that an array's size 2109 /// can require, which limits the maximum size of the array. 2110 static unsigned getMaxSizeBits(ASTContext &Context); 2111 2112 void Profile(llvm::FoldingSetNodeID &ID) { 2113 Profile(ID, getElementType(), getSize(), 2114 getSizeModifier(), getIndexTypeCVRQualifiers()); 2115 } 2116 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 2117 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 2118 unsigned TypeQuals) { 2119 ID.AddPointer(ET.getAsOpaquePtr()); 2120 ID.AddInteger(ArraySize.getZExtValue()); 2121 ID.AddInteger(SizeMod); 2122 ID.AddInteger(TypeQuals); 2123 } 2124 static bool classof(const Type *T) { 2125 return T->getTypeClass() == ConstantArray; 2126 } 2127 static bool classof(const ConstantArrayType *) { return true; } 2128}; 2129 2130/// IncompleteArrayType - This class represents C arrays with an unspecified 2131/// size. For example 'int A[]' has an IncompleteArrayType where the element 2132/// type is 'int' and the size is unspecified. 2133class IncompleteArrayType : public ArrayType { 2134 2135 IncompleteArrayType(QualType et, QualType can, 2136 ArraySizeModifier sm, unsigned tq) 2137 : ArrayType(IncompleteArray, et, can, sm, tq, 2138 et->containsUnexpandedParameterPack()) {} 2139 friend class ASTContext; // ASTContext creates these. 2140public: 2141 bool isSugared() const { return false; } 2142 QualType desugar() const { return QualType(this, 0); } 2143 2144 static bool classof(const Type *T) { 2145 return T->getTypeClass() == IncompleteArray; 2146 } 2147 static bool classof(const IncompleteArrayType *) { return true; } 2148 2149 friend class StmtIteratorBase; 2150 2151 void Profile(llvm::FoldingSetNodeID &ID) { 2152 Profile(ID, getElementType(), getSizeModifier(), 2153 getIndexTypeCVRQualifiers()); 2154 } 2155 2156 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 2157 ArraySizeModifier SizeMod, unsigned TypeQuals) { 2158 ID.AddPointer(ET.getAsOpaquePtr()); 2159 ID.AddInteger(SizeMod); 2160 ID.AddInteger(TypeQuals); 2161 } 2162}; 2163 2164/// VariableArrayType - This class represents C arrays with a specified size 2165/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 2166/// Since the size expression is an arbitrary expression, we store it as such. 2167/// 2168/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 2169/// should not be: two lexically equivalent variable array types could mean 2170/// different things, for example, these variables do not have the same type 2171/// dynamically: 2172/// 2173/// void foo(int x) { 2174/// int Y[x]; 2175/// ++x; 2176/// int Z[x]; 2177/// } 2178/// 2179class VariableArrayType : public ArrayType { 2180 /// SizeExpr - An assignment expression. VLA's are only permitted within 2181 /// a function block. 2182 Stmt *SizeExpr; 2183 /// Brackets - The left and right array brackets. 2184 SourceRange Brackets; 2185 2186 VariableArrayType(QualType et, QualType can, Expr *e, 2187 ArraySizeModifier sm, unsigned tq, 2188 SourceRange brackets) 2189 : ArrayType(VariableArray, et, can, sm, tq, 2190 et->containsUnexpandedParameterPack()), 2191 SizeExpr((Stmt*) e), Brackets(brackets) {} 2192 friend class ASTContext; // ASTContext creates these. 2193 2194public: 2195 Expr *getSizeExpr() const { 2196 // We use C-style casts instead of cast<> here because we do not wish 2197 // to have a dependency of Type.h on Stmt.h/Expr.h. 2198 return (Expr*) SizeExpr; 2199 } 2200 SourceRange getBracketsRange() const { return Brackets; } 2201 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 2202 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 2203 2204 bool isSugared() const { return false; } 2205 QualType desugar() const { return QualType(this, 0); } 2206 2207 static bool classof(const Type *T) { 2208 return T->getTypeClass() == VariableArray; 2209 } 2210 static bool classof(const VariableArrayType *) { return true; } 2211 2212 friend class StmtIteratorBase; 2213 2214 void Profile(llvm::FoldingSetNodeID &ID) { 2215 llvm_unreachable("Cannot unique VariableArrayTypes."); 2216 } 2217}; 2218 2219/// DependentSizedArrayType - This type represents an array type in 2220/// C++ whose size is a value-dependent expression. For example: 2221/// 2222/// \code 2223/// template<typename T, int Size> 2224/// class array { 2225/// T data[Size]; 2226/// }; 2227/// \endcode 2228/// 2229/// For these types, we won't actually know what the array bound is 2230/// until template instantiation occurs, at which point this will 2231/// become either a ConstantArrayType or a VariableArrayType. 2232class DependentSizedArrayType : public ArrayType { 2233 const ASTContext &Context; 2234 2235 /// \brief An assignment expression that will instantiate to the 2236 /// size of the array. 2237 /// 2238 /// The expression itself might be NULL, in which case the array 2239 /// type will have its size deduced from an initializer. 2240 Stmt *SizeExpr; 2241 2242 /// Brackets - The left and right array brackets. 2243 SourceRange Brackets; 2244 2245 DependentSizedArrayType(const ASTContext &Context, QualType et, QualType can, 2246 Expr *e, ArraySizeModifier sm, unsigned tq, 2247 SourceRange brackets); 2248 2249 friend class ASTContext; // ASTContext creates these. 2250 2251public: 2252 Expr *getSizeExpr() const { 2253 // We use C-style casts instead of cast<> here because we do not wish 2254 // to have a dependency of Type.h on Stmt.h/Expr.h. 2255 return (Expr*) SizeExpr; 2256 } 2257 SourceRange getBracketsRange() const { return Brackets; } 2258 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 2259 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 2260 2261 bool isSugared() const { return false; } 2262 QualType desugar() const { return QualType(this, 0); } 2263 2264 static bool classof(const Type *T) { 2265 return T->getTypeClass() == DependentSizedArray; 2266 } 2267 static bool classof(const DependentSizedArrayType *) { return true; } 2268 2269 friend class StmtIteratorBase; 2270 2271 2272 void Profile(llvm::FoldingSetNodeID &ID) { 2273 Profile(ID, Context, getElementType(), 2274 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 2275 } 2276 2277 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2278 QualType ET, ArraySizeModifier SizeMod, 2279 unsigned TypeQuals, Expr *E); 2280}; 2281 2282/// DependentSizedExtVectorType - This type represent an extended vector type 2283/// where either the type or size is dependent. For example: 2284/// @code 2285/// template<typename T, int Size> 2286/// class vector { 2287/// typedef T __attribute__((ext_vector_type(Size))) type; 2288/// } 2289/// @endcode 2290class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 2291 const ASTContext &Context; 2292 Expr *SizeExpr; 2293 /// ElementType - The element type of the array. 2294 QualType ElementType; 2295 SourceLocation loc; 2296 2297 DependentSizedExtVectorType(const ASTContext &Context, QualType ElementType, 2298 QualType can, Expr *SizeExpr, SourceLocation loc); 2299 2300 friend class ASTContext; 2301 2302public: 2303 Expr *getSizeExpr() const { return SizeExpr; } 2304 QualType getElementType() const { return ElementType; } 2305 SourceLocation getAttributeLoc() const { return loc; } 2306 2307 bool isSugared() const { return false; } 2308 QualType desugar() const { return QualType(this, 0); } 2309 2310 static bool classof(const Type *T) { 2311 return T->getTypeClass() == DependentSizedExtVector; 2312 } 2313 static bool classof(const DependentSizedExtVectorType *) { return true; } 2314 2315 void Profile(llvm::FoldingSetNodeID &ID) { 2316 Profile(ID, Context, getElementType(), getSizeExpr()); 2317 } 2318 2319 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2320 QualType ElementType, Expr *SizeExpr); 2321}; 2322 2323 2324/// VectorType - GCC generic vector type. This type is created using 2325/// __attribute__((vector_size(n)), where "n" specifies the vector size in 2326/// bytes; or from an Altivec __vector or vector declaration. 2327/// Since the constructor takes the number of vector elements, the 2328/// client is responsible for converting the size into the number of elements. 2329class VectorType : public Type, public llvm::FoldingSetNode { 2330public: 2331 enum VectorKind { 2332 GenericVector, // not a target-specific vector type 2333 AltiVecVector, // is AltiVec vector 2334 AltiVecPixel, // is AltiVec 'vector Pixel' 2335 AltiVecBool, // is AltiVec 'vector bool ...' 2336 NeonVector, // is ARM Neon vector 2337 NeonPolyVector // is ARM Neon polynomial vector 2338 }; 2339protected: 2340 /// ElementType - The element type of the vector. 2341 QualType ElementType; 2342 2343 VectorType(QualType vecType, unsigned nElements, QualType canonType, 2344 VectorKind vecKind); 2345 2346 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 2347 QualType canonType, VectorKind vecKind); 2348 2349 friend class ASTContext; // ASTContext creates these. 2350 2351public: 2352 2353 QualType getElementType() const { return ElementType; } 2354 unsigned getNumElements() const { return VectorTypeBits.NumElements; } 2355 2356 bool isSugared() const { return false; } 2357 QualType desugar() const { return QualType(this, 0); } 2358 2359 VectorKind getVectorKind() const { 2360 return VectorKind(VectorTypeBits.VecKind); 2361 } 2362 2363 void Profile(llvm::FoldingSetNodeID &ID) { 2364 Profile(ID, getElementType(), getNumElements(), 2365 getTypeClass(), getVectorKind()); 2366 } 2367 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 2368 unsigned NumElements, TypeClass TypeClass, 2369 VectorKind VecKind) { 2370 ID.AddPointer(ElementType.getAsOpaquePtr()); 2371 ID.AddInteger(NumElements); 2372 ID.AddInteger(TypeClass); 2373 ID.AddInteger(VecKind); 2374 } 2375 2376 static bool classof(const Type *T) { 2377 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 2378 } 2379 static bool classof(const VectorType *) { return true; } 2380}; 2381 2382/// ExtVectorType - Extended vector type. This type is created using 2383/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 2384/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 2385/// class enables syntactic extensions, like Vector Components for accessing 2386/// points, colors, and textures (modeled after OpenGL Shading Language). 2387class ExtVectorType : public VectorType { 2388 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 2389 VectorType(ExtVector, vecType, nElements, canonType, GenericVector) {} 2390 friend class ASTContext; // ASTContext creates these. 2391public: 2392 static int getPointAccessorIdx(char c) { 2393 switch (c) { 2394 default: return -1; 2395 case 'x': return 0; 2396 case 'y': return 1; 2397 case 'z': return 2; 2398 case 'w': return 3; 2399 } 2400 } 2401 static int getNumericAccessorIdx(char c) { 2402 switch (c) { 2403 default: return -1; 2404 case '0': return 0; 2405 case '1': return 1; 2406 case '2': return 2; 2407 case '3': return 3; 2408 case '4': return 4; 2409 case '5': return 5; 2410 case '6': return 6; 2411 case '7': return 7; 2412 case '8': return 8; 2413 case '9': return 9; 2414 case 'A': 2415 case 'a': return 10; 2416 case 'B': 2417 case 'b': return 11; 2418 case 'C': 2419 case 'c': return 12; 2420 case 'D': 2421 case 'd': return 13; 2422 case 'E': 2423 case 'e': return 14; 2424 case 'F': 2425 case 'f': return 15; 2426 } 2427 } 2428 2429 static int getAccessorIdx(char c) { 2430 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 2431 return getNumericAccessorIdx(c); 2432 } 2433 2434 bool isAccessorWithinNumElements(char c) const { 2435 if (int idx = getAccessorIdx(c)+1) 2436 return unsigned(idx-1) < getNumElements(); 2437 return false; 2438 } 2439 bool isSugared() const { return false; } 2440 QualType desugar() const { return QualType(this, 0); } 2441 2442 static bool classof(const Type *T) { 2443 return T->getTypeClass() == ExtVector; 2444 } 2445 static bool classof(const ExtVectorType *) { return true; } 2446}; 2447 2448/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 2449/// class of FunctionNoProtoType and FunctionProtoType. 2450/// 2451class FunctionType : public Type { 2452 // The type returned by the function. 2453 QualType ResultType; 2454 2455 public: 2456 /// ExtInfo - A class which abstracts out some details necessary for 2457 /// making a call. 2458 /// 2459 /// It is not actually used directly for storing this information in 2460 /// a FunctionType, although FunctionType does currently use the 2461 /// same bit-pattern. 2462 /// 2463 // If you add a field (say Foo), other than the obvious places (both, 2464 // constructors, compile failures), what you need to update is 2465 // * Operator== 2466 // * getFoo 2467 // * withFoo 2468 // * functionType. Add Foo, getFoo. 2469 // * ASTContext::getFooType 2470 // * ASTContext::mergeFunctionTypes 2471 // * FunctionNoProtoType::Profile 2472 // * FunctionProtoType::Profile 2473 // * TypePrinter::PrintFunctionProto 2474 // * AST read and write 2475 // * Codegen 2476 class ExtInfo { 2477 // Feel free to rearrange or add bits, but if you go over 8, 2478 // you'll need to adjust both the Bits field below and 2479 // Type::FunctionTypeBitfields. 2480 2481 // | CC |noreturn|produces|regparm| 2482 // |0 .. 2| 3 | 4 | 5 .. 7| 2483 // 2484 // regparm is either 0 (no regparm attribute) or the regparm value+1. 2485 enum { CallConvMask = 0x7 }; 2486 enum { NoReturnMask = 0x8 }; 2487 enum { ProducesResultMask = 0x10 }; 2488 enum { RegParmMask = ~(CallConvMask | NoReturnMask | ProducesResultMask), 2489 RegParmOffset = 5 }; // Assumed to be the last field 2490 2491 uint16_t Bits; 2492 2493 ExtInfo(unsigned Bits) : Bits(static_cast<uint16_t>(Bits)) {} 2494 2495 friend class FunctionType; 2496 2497 public: 2498 // Constructor with no defaults. Use this when you know that you 2499 // have all the elements (when reading an AST file for example). 2500 ExtInfo(bool noReturn, bool hasRegParm, unsigned regParm, CallingConv cc, 2501 bool producesResult) { 2502 assert((!hasRegParm || regParm < 7) && "Invalid regparm value"); 2503 Bits = ((unsigned) cc) | 2504 (noReturn ? NoReturnMask : 0) | 2505 (producesResult ? ProducesResultMask : 0) | 2506 (hasRegParm ? ((regParm + 1) << RegParmOffset) : 0); 2507 } 2508 2509 // Constructor with all defaults. Use when for example creating a 2510 // function know to use defaults. 2511 ExtInfo() : Bits(0) {} 2512 2513 bool getNoReturn() const { return Bits & NoReturnMask; } 2514 bool getProducesResult() const { return Bits & ProducesResultMask; } 2515 bool getHasRegParm() const { return (Bits >> RegParmOffset) != 0; } 2516 unsigned getRegParm() const { 2517 unsigned RegParm = Bits >> RegParmOffset; 2518 if (RegParm > 0) 2519 --RegParm; 2520 return RegParm; 2521 } 2522 CallingConv getCC() const { return CallingConv(Bits & CallConvMask); } 2523 2524 bool operator==(ExtInfo Other) const { 2525 return Bits == Other.Bits; 2526 } 2527 bool operator!=(ExtInfo Other) const { 2528 return Bits != Other.Bits; 2529 } 2530 2531 // Note that we don't have setters. That is by design, use 2532 // the following with methods instead of mutating these objects. 2533 2534 ExtInfo withNoReturn(bool noReturn) const { 2535 if (noReturn) 2536 return ExtInfo(Bits | NoReturnMask); 2537 else 2538 return ExtInfo(Bits & ~NoReturnMask); 2539 } 2540 2541 ExtInfo withProducesResult(bool producesResult) const { 2542 if (producesResult) 2543 return ExtInfo(Bits | ProducesResultMask); 2544 else 2545 return ExtInfo(Bits & ~ProducesResultMask); 2546 } 2547 2548 ExtInfo withRegParm(unsigned RegParm) const { 2549 assert(RegParm < 7 && "Invalid regparm value"); 2550 return ExtInfo((Bits & ~RegParmMask) | 2551 ((RegParm + 1) << RegParmOffset)); 2552 } 2553 2554 ExtInfo withCallingConv(CallingConv cc) const { 2555 return ExtInfo((Bits & ~CallConvMask) | (unsigned) cc); 2556 } 2557 2558 void Profile(llvm::FoldingSetNodeID &ID) const { 2559 ID.AddInteger(Bits); 2560 } 2561 }; 2562 2563protected: 2564 FunctionType(TypeClass tc, QualType res, bool variadic, 2565 unsigned typeQuals, RefQualifierKind RefQualifier, 2566 QualType Canonical, bool Dependent, 2567 bool InstantiationDependent, 2568 bool VariablyModified, bool ContainsUnexpandedParameterPack, 2569 ExtInfo Info) 2570 : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified, 2571 ContainsUnexpandedParameterPack), 2572 ResultType(res) { 2573 FunctionTypeBits.ExtInfo = Info.Bits; 2574 FunctionTypeBits.Variadic = variadic; 2575 FunctionTypeBits.TypeQuals = typeQuals; 2576 FunctionTypeBits.RefQualifier = static_cast<unsigned>(RefQualifier); 2577 } 2578 bool isVariadic() const { return FunctionTypeBits.Variadic; } 2579 unsigned getTypeQuals() const { return FunctionTypeBits.TypeQuals; } 2580 2581 RefQualifierKind getRefQualifier() const { 2582 return static_cast<RefQualifierKind>(FunctionTypeBits.RefQualifier); 2583 } 2584 2585public: 2586 2587 QualType getResultType() const { return ResultType; } 2588 2589 bool getHasRegParm() const { return getExtInfo().getHasRegParm(); } 2590 unsigned getRegParmType() const { return getExtInfo().getRegParm(); } 2591 bool getNoReturnAttr() const { return getExtInfo().getNoReturn(); } 2592 CallingConv getCallConv() const { return getExtInfo().getCC(); } 2593 ExtInfo getExtInfo() const { return ExtInfo(FunctionTypeBits.ExtInfo); } 2594 2595 /// \brief Determine the type of an expression that calls a function of 2596 /// this type. 2597 QualType getCallResultType(ASTContext &Context) const { 2598 return getResultType().getNonLValueExprType(Context); 2599 } 2600 2601 static StringRef getNameForCallConv(CallingConv CC); 2602 2603 static bool classof(const Type *T) { 2604 return T->getTypeClass() == FunctionNoProto || 2605 T->getTypeClass() == FunctionProto; 2606 } 2607 static bool classof(const FunctionType *) { return true; } 2608}; 2609 2610/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 2611/// no information available about its arguments. 2612class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 2613 FunctionNoProtoType(QualType Result, QualType Canonical, ExtInfo Info) 2614 : FunctionType(FunctionNoProto, Result, false, 0, RQ_None, Canonical, 2615 /*Dependent=*/false, /*InstantiationDependent=*/false, 2616 Result->isVariablyModifiedType(), 2617 /*ContainsUnexpandedParameterPack=*/false, Info) {} 2618 2619 friend class ASTContext; // ASTContext creates these. 2620 2621public: 2622 // No additional state past what FunctionType provides. 2623 2624 bool isSugared() const { return false; } 2625 QualType desugar() const { return QualType(this, 0); } 2626 2627 void Profile(llvm::FoldingSetNodeID &ID) { 2628 Profile(ID, getResultType(), getExtInfo()); 2629 } 2630 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 2631 ExtInfo Info) { 2632 Info.Profile(ID); 2633 ID.AddPointer(ResultType.getAsOpaquePtr()); 2634 } 2635 2636 static bool classof(const Type *T) { 2637 return T->getTypeClass() == FunctionNoProto; 2638 } 2639 static bool classof(const FunctionNoProtoType *) { return true; } 2640}; 2641 2642/// FunctionProtoType - Represents a prototype with argument type info, e.g. 2643/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 2644/// arguments, not as having a single void argument. Such a type can have an 2645/// exception specification, but this specification is not part of the canonical 2646/// type. 2647class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 2648public: 2649 /// ExtProtoInfo - Extra information about a function prototype. 2650 struct ExtProtoInfo { 2651 ExtProtoInfo() : 2652 Variadic(false), ExceptionSpecType(EST_None), TypeQuals(0), 2653 RefQualifier(RQ_None), NumExceptions(0), Exceptions(0), NoexceptExpr(0), 2654 ConsumedArguments(0) {} 2655 2656 FunctionType::ExtInfo ExtInfo; 2657 bool Variadic; 2658 ExceptionSpecificationType ExceptionSpecType; 2659 unsigned char TypeQuals; 2660 RefQualifierKind RefQualifier; 2661 unsigned NumExceptions; 2662 const QualType *Exceptions; 2663 Expr *NoexceptExpr; 2664 const bool *ConsumedArguments; 2665 }; 2666 2667private: 2668 /// \brief Determine whether there are any argument types that 2669 /// contain an unexpanded parameter pack. 2670 static bool containsAnyUnexpandedParameterPack(const QualType *ArgArray, 2671 unsigned numArgs) { 2672 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 2673 if (ArgArray[Idx]->containsUnexpandedParameterPack()) 2674 return true; 2675 2676 return false; 2677 } 2678 2679 FunctionProtoType(QualType result, const QualType *args, unsigned numArgs, 2680 QualType canonical, const ExtProtoInfo &epi); 2681 2682 /// NumArgs - The number of arguments this function has, not counting '...'. 2683 unsigned NumArgs : 19; 2684 2685 /// NumExceptions - The number of types in the exception spec, if any. 2686 unsigned NumExceptions : 9; 2687 2688 /// ExceptionSpecType - The type of exception specification this function has. 2689 unsigned ExceptionSpecType : 3; 2690 2691 /// HasAnyConsumedArgs - Whether this function has any consumed arguments. 2692 unsigned HasAnyConsumedArgs : 1; 2693 2694 // ArgInfo - There is an variable size array after the class in memory that 2695 // holds the argument types. 2696 2697 // Exceptions - There is another variable size array after ArgInfo that 2698 // holds the exception types. 2699 2700 // NoexceptExpr - Instead of Exceptions, there may be a single Expr* pointing 2701 // to the expression in the noexcept() specifier. 2702 2703 // ConsumedArgs - A variable size array, following Exceptions 2704 // and of length NumArgs, holding flags indicating which arguments 2705 // are consumed. This only appears if HasAnyConsumedArgs is true. 2706 2707 friend class ASTContext; // ASTContext creates these. 2708 2709 const bool *getConsumedArgsBuffer() const { 2710 assert(hasAnyConsumedArgs()); 2711 2712 // Find the end of the exceptions. 2713 Expr * const *eh_end = reinterpret_cast<Expr * const *>(arg_type_end()); 2714 if (getExceptionSpecType() != EST_ComputedNoexcept) 2715 eh_end += NumExceptions; 2716 else 2717 eh_end += 1; // NoexceptExpr 2718 2719 return reinterpret_cast<const bool*>(eh_end); 2720 } 2721 2722public: 2723 unsigned getNumArgs() const { return NumArgs; } 2724 QualType getArgType(unsigned i) const { 2725 assert(i < NumArgs && "Invalid argument number!"); 2726 return arg_type_begin()[i]; 2727 } 2728 2729 ExtProtoInfo getExtProtoInfo() const { 2730 ExtProtoInfo EPI; 2731 EPI.ExtInfo = getExtInfo(); 2732 EPI.Variadic = isVariadic(); 2733 EPI.ExceptionSpecType = getExceptionSpecType(); 2734 EPI.TypeQuals = static_cast<unsigned char>(getTypeQuals()); 2735 EPI.RefQualifier = getRefQualifier(); 2736 if (EPI.ExceptionSpecType == EST_Dynamic) { 2737 EPI.NumExceptions = NumExceptions; 2738 EPI.Exceptions = exception_begin(); 2739 } else if (EPI.ExceptionSpecType == EST_ComputedNoexcept) { 2740 EPI.NoexceptExpr = getNoexceptExpr(); 2741 } 2742 if (hasAnyConsumedArgs()) 2743 EPI.ConsumedArguments = getConsumedArgsBuffer(); 2744 return EPI; 2745 } 2746 2747 /// \brief Get the kind of exception specification on this function. 2748 ExceptionSpecificationType getExceptionSpecType() const { 2749 return static_cast<ExceptionSpecificationType>(ExceptionSpecType); 2750 } 2751 /// \brief Return whether this function has any kind of exception spec. 2752 bool hasExceptionSpec() const { 2753 return getExceptionSpecType() != EST_None; 2754 } 2755 /// \brief Return whether this function has a dynamic (throw) exception spec. 2756 bool hasDynamicExceptionSpec() const { 2757 return isDynamicExceptionSpec(getExceptionSpecType()); 2758 } 2759 /// \brief Return whether this function has a noexcept exception spec. 2760 bool hasNoexceptExceptionSpec() const { 2761 return isNoexceptExceptionSpec(getExceptionSpecType()); 2762 } 2763 /// \brief Result type of getNoexceptSpec(). 2764 enum NoexceptResult { 2765 NR_NoNoexcept, ///< There is no noexcept specifier. 2766 NR_BadNoexcept, ///< The noexcept specifier has a bad expression. 2767 NR_Dependent, ///< The noexcept specifier is dependent. 2768 NR_Throw, ///< The noexcept specifier evaluates to false. 2769 NR_Nothrow ///< The noexcept specifier evaluates to true. 2770 }; 2771 /// \brief Get the meaning of the noexcept spec on this function, if any. 2772 NoexceptResult getNoexceptSpec(ASTContext &Ctx) const; 2773 unsigned getNumExceptions() const { return NumExceptions; } 2774 QualType getExceptionType(unsigned i) const { 2775 assert(i < NumExceptions && "Invalid exception number!"); 2776 return exception_begin()[i]; 2777 } 2778 Expr *getNoexceptExpr() const { 2779 if (getExceptionSpecType() != EST_ComputedNoexcept) 2780 return 0; 2781 // NoexceptExpr sits where the arguments end. 2782 return *reinterpret_cast<Expr *const *>(arg_type_end()); 2783 } 2784 bool isNothrow(ASTContext &Ctx) const { 2785 ExceptionSpecificationType EST = getExceptionSpecType(); 2786 assert(EST != EST_Delayed); 2787 if (EST == EST_DynamicNone || EST == EST_BasicNoexcept) 2788 return true; 2789 if (EST != EST_ComputedNoexcept) 2790 return false; 2791 return getNoexceptSpec(Ctx) == NR_Nothrow; 2792 } 2793 2794 using FunctionType::isVariadic; 2795 2796 /// \brief Determines whether this function prototype contains a 2797 /// parameter pack at the end. 2798 /// 2799 /// A function template whose last parameter is a parameter pack can be 2800 /// called with an arbitrary number of arguments, much like a variadic 2801 /// function. However, 2802 bool isTemplateVariadic() const; 2803 2804 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 2805 2806 2807 /// \brief Retrieve the ref-qualifier associated with this function type. 2808 RefQualifierKind getRefQualifier() const { 2809 return FunctionType::getRefQualifier(); 2810 } 2811 2812 typedef const QualType *arg_type_iterator; 2813 arg_type_iterator arg_type_begin() const { 2814 return reinterpret_cast<const QualType *>(this+1); 2815 } 2816 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 2817 2818 typedef const QualType *exception_iterator; 2819 exception_iterator exception_begin() const { 2820 // exceptions begin where arguments end 2821 return arg_type_end(); 2822 } 2823 exception_iterator exception_end() const { 2824 if (getExceptionSpecType() != EST_Dynamic) 2825 return exception_begin(); 2826 return exception_begin() + NumExceptions; 2827 } 2828 2829 bool hasAnyConsumedArgs() const { 2830 return HasAnyConsumedArgs; 2831 } 2832 bool isArgConsumed(unsigned I) const { 2833 assert(I < getNumArgs() && "argument index out of range!"); 2834 if (hasAnyConsumedArgs()) 2835 return getConsumedArgsBuffer()[I]; 2836 return false; 2837 } 2838 2839 bool isSugared() const { return false; } 2840 QualType desugar() const { return QualType(this, 0); } 2841 2842 static bool classof(const Type *T) { 2843 return T->getTypeClass() == FunctionProto; 2844 } 2845 static bool classof(const FunctionProtoType *) { return true; } 2846 2847 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx); 2848 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 2849 arg_type_iterator ArgTys, unsigned NumArgs, 2850 const ExtProtoInfo &EPI, const ASTContext &Context); 2851}; 2852 2853 2854/// \brief Represents the dependent type named by a dependently-scoped 2855/// typename using declaration, e.g. 2856/// using typename Base<T>::foo; 2857/// Template instantiation turns these into the underlying type. 2858class UnresolvedUsingType : public Type { 2859 UnresolvedUsingTypenameDecl *Decl; 2860 2861 UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) 2862 : Type(UnresolvedUsing, QualType(), true, true, false, 2863 /*ContainsUnexpandedParameterPack=*/false), 2864 Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} 2865 friend class ASTContext; // ASTContext creates these. 2866public: 2867 2868 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 2869 2870 bool isSugared() const { return false; } 2871 QualType desugar() const { return QualType(this, 0); } 2872 2873 static bool classof(const Type *T) { 2874 return T->getTypeClass() == UnresolvedUsing; 2875 } 2876 static bool classof(const UnresolvedUsingType *) { return true; } 2877 2878 void Profile(llvm::FoldingSetNodeID &ID) { 2879 return Profile(ID, Decl); 2880 } 2881 static void Profile(llvm::FoldingSetNodeID &ID, 2882 UnresolvedUsingTypenameDecl *D) { 2883 ID.AddPointer(D); 2884 } 2885}; 2886 2887 2888class TypedefType : public Type { 2889 TypedefNameDecl *Decl; 2890protected: 2891 TypedefType(TypeClass tc, const TypedefNameDecl *D, QualType can) 2892 : Type(tc, can, can->isDependentType(), 2893 can->isInstantiationDependentType(), 2894 can->isVariablyModifiedType(), 2895 /*ContainsUnexpandedParameterPack=*/false), 2896 Decl(const_cast<TypedefNameDecl*>(D)) { 2897 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2898 } 2899 friend class ASTContext; // ASTContext creates these. 2900public: 2901 2902 TypedefNameDecl *getDecl() const { return Decl; } 2903 2904 bool isSugared() const { return true; } 2905 QualType desugar() const; 2906 2907 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 2908 static bool classof(const TypedefType *) { return true; } 2909}; 2910 2911/// TypeOfExprType (GCC extension). 2912class TypeOfExprType : public Type { 2913 Expr *TOExpr; 2914 2915protected: 2916 TypeOfExprType(Expr *E, QualType can = QualType()); 2917 friend class ASTContext; // ASTContext creates these. 2918public: 2919 Expr *getUnderlyingExpr() const { return TOExpr; } 2920 2921 /// \brief Remove a single level of sugar. 2922 QualType desugar() const; 2923 2924 /// \brief Returns whether this type directly provides sugar. 2925 bool isSugared() const; 2926 2927 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 2928 static bool classof(const TypeOfExprType *) { return true; } 2929}; 2930 2931/// \brief Internal representation of canonical, dependent 2932/// typeof(expr) types. 2933/// 2934/// This class is used internally by the ASTContext to manage 2935/// canonical, dependent types, only. Clients will only see instances 2936/// of this class via TypeOfExprType nodes. 2937class DependentTypeOfExprType 2938 : public TypeOfExprType, public llvm::FoldingSetNode { 2939 const ASTContext &Context; 2940 2941public: 2942 DependentTypeOfExprType(const ASTContext &Context, Expr *E) 2943 : TypeOfExprType(E), Context(Context) { } 2944 2945 void Profile(llvm::FoldingSetNodeID &ID) { 2946 Profile(ID, Context, getUnderlyingExpr()); 2947 } 2948 2949 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2950 Expr *E); 2951}; 2952 2953/// TypeOfType (GCC extension). 2954class TypeOfType : public Type { 2955 QualType TOType; 2956 TypeOfType(QualType T, QualType can) 2957 : Type(TypeOf, can, T->isDependentType(), 2958 T->isInstantiationDependentType(), 2959 T->isVariablyModifiedType(), 2960 T->containsUnexpandedParameterPack()), 2961 TOType(T) { 2962 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2963 } 2964 friend class ASTContext; // ASTContext creates these. 2965public: 2966 QualType getUnderlyingType() const { return TOType; } 2967 2968 /// \brief Remove a single level of sugar. 2969 QualType desugar() const { return getUnderlyingType(); } 2970 2971 /// \brief Returns whether this type directly provides sugar. 2972 bool isSugared() const { return true; } 2973 2974 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 2975 static bool classof(const TypeOfType *) { return true; } 2976}; 2977 2978/// DecltypeType (C++0x) 2979class DecltypeType : public Type { 2980 Expr *E; 2981 2982 // FIXME: We could get rid of UnderlyingType if we wanted to: We would have to 2983 // Move getDesugaredType to ASTContext so that it can call getDecltypeForExpr 2984 // from it. 2985 QualType UnderlyingType; 2986 2987protected: 2988 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 2989 friend class ASTContext; // ASTContext creates these. 2990public: 2991 Expr *getUnderlyingExpr() const { return E; } 2992 QualType getUnderlyingType() const { return UnderlyingType; } 2993 2994 /// \brief Remove a single level of sugar. 2995 QualType desugar() const; 2996 2997 /// \brief Returns whether this type directly provides sugar. 2998 bool isSugared() const; 2999 3000 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 3001 static bool classof(const DecltypeType *) { return true; } 3002}; 3003 3004/// \brief Internal representation of canonical, dependent 3005/// decltype(expr) types. 3006/// 3007/// This class is used internally by the ASTContext to manage 3008/// canonical, dependent types, only. Clients will only see instances 3009/// of this class via DecltypeType nodes. 3010class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 3011 const ASTContext &Context; 3012 3013public: 3014 DependentDecltypeType(const ASTContext &Context, Expr *E); 3015 3016 void Profile(llvm::FoldingSetNodeID &ID) { 3017 Profile(ID, Context, getUnderlyingExpr()); 3018 } 3019 3020 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 3021 Expr *E); 3022}; 3023 3024/// \brief A unary type transform, which is a type constructed from another 3025class UnaryTransformType : public Type { 3026public: 3027 enum UTTKind { 3028 EnumUnderlyingType 3029 }; 3030 3031private: 3032 /// The untransformed type. 3033 QualType BaseType; 3034 /// The transformed type if not dependent, otherwise the same as BaseType. 3035 QualType UnderlyingType; 3036 3037 UTTKind UKind; 3038protected: 3039 UnaryTransformType(QualType BaseTy, QualType UnderlyingTy, UTTKind UKind, 3040 QualType CanonicalTy); 3041 friend class ASTContext; 3042public: 3043 bool isSugared() const { return !isDependentType(); } 3044 QualType desugar() const { return UnderlyingType; } 3045 3046 QualType getUnderlyingType() const { return UnderlyingType; } 3047 QualType getBaseType() const { return BaseType; } 3048 3049 UTTKind getUTTKind() const { return UKind; } 3050 3051 static bool classof(const Type *T) { 3052 return T->getTypeClass() == UnaryTransform; 3053 } 3054 static bool classof(const UnaryTransformType *) { return true; } 3055}; 3056 3057class TagType : public Type { 3058 /// Stores the TagDecl associated with this type. The decl may point to any 3059 /// TagDecl that declares the entity. 3060 TagDecl * decl; 3061 3062protected: 3063 TagType(TypeClass TC, const TagDecl *D, QualType can); 3064 3065public: 3066 TagDecl *getDecl() const; 3067 3068 /// @brief Determines whether this type is in the process of being 3069 /// defined. 3070 bool isBeingDefined() const; 3071 3072 static bool classof(const Type *T) { 3073 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 3074 } 3075 static bool classof(const TagType *) { return true; } 3076 static bool classof(const RecordType *) { return true; } 3077 static bool classof(const EnumType *) { return true; } 3078}; 3079 3080/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 3081/// to detect TagType objects of structs/unions/classes. 3082class RecordType : public TagType { 3083protected: 3084 explicit RecordType(const RecordDecl *D) 3085 : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3086 explicit RecordType(TypeClass TC, RecordDecl *D) 3087 : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3088 friend class ASTContext; // ASTContext creates these. 3089public: 3090 3091 RecordDecl *getDecl() const { 3092 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 3093 } 3094 3095 // FIXME: This predicate is a helper to QualType/Type. It needs to 3096 // recursively check all fields for const-ness. If any field is declared 3097 // const, it needs to return false. 3098 bool hasConstFields() const { return false; } 3099 3100 bool isSugared() const { return false; } 3101 QualType desugar() const { return QualType(this, 0); } 3102 3103 static bool classof(const TagType *T); 3104 static bool classof(const Type *T) { 3105 return isa<TagType>(T) && classof(cast<TagType>(T)); 3106 } 3107 static bool classof(const RecordType *) { return true; } 3108}; 3109 3110/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 3111/// to detect TagType objects of enums. 3112class EnumType : public TagType { 3113 explicit EnumType(const EnumDecl *D) 3114 : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3115 friend class ASTContext; // ASTContext creates these. 3116public: 3117 3118 EnumDecl *getDecl() const { 3119 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 3120 } 3121 3122 bool isSugared() const { return false; } 3123 QualType desugar() const { return QualType(this, 0); } 3124 3125 static bool classof(const TagType *T); 3126 static bool classof(const Type *T) { 3127 return isa<TagType>(T) && classof(cast<TagType>(T)); 3128 } 3129 static bool classof(const EnumType *) { return true; } 3130}; 3131 3132/// AttributedType - An attributed type is a type to which a type 3133/// attribute has been applied. The "modified type" is the 3134/// fully-sugared type to which the attributed type was applied; 3135/// generally it is not canonically equivalent to the attributed type. 3136/// The "equivalent type" is the minimally-desugared type which the 3137/// type is canonically equivalent to. 3138/// 3139/// For example, in the following attributed type: 3140/// int32_t __attribute__((vector_size(16))) 3141/// - the modified type is the TypedefType for int32_t 3142/// - the equivalent type is VectorType(16, int32_t) 3143/// - the canonical type is VectorType(16, int) 3144class AttributedType : public Type, public llvm::FoldingSetNode { 3145public: 3146 // It is really silly to have yet another attribute-kind enum, but 3147 // clang::attr::Kind doesn't currently cover the pure type attrs. 3148 enum Kind { 3149 // Expression operand. 3150 attr_address_space, 3151 attr_regparm, 3152 attr_vector_size, 3153 attr_neon_vector_type, 3154 attr_neon_polyvector_type, 3155 3156 FirstExprOperandKind = attr_address_space, 3157 LastExprOperandKind = attr_neon_polyvector_type, 3158 3159 // Enumerated operand (string or keyword). 3160 attr_objc_gc, 3161 attr_objc_ownership, 3162 attr_pcs, 3163 3164 FirstEnumOperandKind = attr_objc_gc, 3165 LastEnumOperandKind = attr_pcs, 3166 3167 // No operand. 3168 attr_noreturn, 3169 attr_cdecl, 3170 attr_fastcall, 3171 attr_stdcall, 3172 attr_thiscall, 3173 attr_pascal 3174 }; 3175 3176private: 3177 QualType ModifiedType; 3178 QualType EquivalentType; 3179 3180 friend class ASTContext; // creates these 3181 3182 AttributedType(QualType canon, Kind attrKind, 3183 QualType modified, QualType equivalent) 3184 : Type(Attributed, canon, canon->isDependentType(), 3185 canon->isInstantiationDependentType(), 3186 canon->isVariablyModifiedType(), 3187 canon->containsUnexpandedParameterPack()), 3188 ModifiedType(modified), EquivalentType(equivalent) { 3189 AttributedTypeBits.AttrKind = attrKind; 3190 } 3191 3192public: 3193 Kind getAttrKind() const { 3194 return static_cast<Kind>(AttributedTypeBits.AttrKind); 3195 } 3196 3197 QualType getModifiedType() const { return ModifiedType; } 3198 QualType getEquivalentType() const { return EquivalentType; } 3199 3200 bool isSugared() const { return true; } 3201 QualType desugar() const { return getEquivalentType(); } 3202 3203 void Profile(llvm::FoldingSetNodeID &ID) { 3204 Profile(ID, getAttrKind(), ModifiedType, EquivalentType); 3205 } 3206 3207 static void Profile(llvm::FoldingSetNodeID &ID, Kind attrKind, 3208 QualType modified, QualType equivalent) { 3209 ID.AddInteger(attrKind); 3210 ID.AddPointer(modified.getAsOpaquePtr()); 3211 ID.AddPointer(equivalent.getAsOpaquePtr()); 3212 } 3213 3214 static bool classof(const Type *T) { 3215 return T->getTypeClass() == Attributed; 3216 } 3217 static bool classof(const AttributedType *T) { return true; } 3218}; 3219 3220class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 3221 // Helper data collector for canonical types. 3222 struct CanonicalTTPTInfo { 3223 unsigned Depth : 15; 3224 unsigned ParameterPack : 1; 3225 unsigned Index : 16; 3226 }; 3227 3228 union { 3229 // Info for the canonical type. 3230 CanonicalTTPTInfo CanTTPTInfo; 3231 // Info for the non-canonical type. 3232 TemplateTypeParmDecl *TTPDecl; 3233 }; 3234 3235 /// Build a non-canonical type. 3236 TemplateTypeParmType(TemplateTypeParmDecl *TTPDecl, QualType Canon) 3237 : Type(TemplateTypeParm, Canon, /*Dependent=*/true, 3238 /*InstantiationDependent=*/true, 3239 /*VariablyModified=*/false, 3240 Canon->containsUnexpandedParameterPack()), 3241 TTPDecl(TTPDecl) { } 3242 3243 /// Build the canonical type. 3244 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 3245 : Type(TemplateTypeParm, QualType(this, 0), 3246 /*Dependent=*/true, 3247 /*InstantiationDependent=*/true, 3248 /*VariablyModified=*/false, PP) { 3249 CanTTPTInfo.Depth = D; 3250 CanTTPTInfo.Index = I; 3251 CanTTPTInfo.ParameterPack = PP; 3252 } 3253 3254 friend class ASTContext; // ASTContext creates these 3255 3256 const CanonicalTTPTInfo& getCanTTPTInfo() const { 3257 QualType Can = getCanonicalTypeInternal(); 3258 return Can->castAs<TemplateTypeParmType>()->CanTTPTInfo; 3259 } 3260 3261public: 3262 unsigned getDepth() const { return getCanTTPTInfo().Depth; } 3263 unsigned getIndex() const { return getCanTTPTInfo().Index; } 3264 bool isParameterPack() const { return getCanTTPTInfo().ParameterPack; } 3265 3266 TemplateTypeParmDecl *getDecl() const { 3267 return isCanonicalUnqualified() ? 0 : TTPDecl; 3268 } 3269 3270 IdentifierInfo *getIdentifier() const; 3271 3272 bool isSugared() const { return false; } 3273 QualType desugar() const { return QualType(this, 0); } 3274 3275 void Profile(llvm::FoldingSetNodeID &ID) { 3276 Profile(ID, getDepth(), getIndex(), isParameterPack(), getDecl()); 3277 } 3278 3279 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 3280 unsigned Index, bool ParameterPack, 3281 TemplateTypeParmDecl *TTPDecl) { 3282 ID.AddInteger(Depth); 3283 ID.AddInteger(Index); 3284 ID.AddBoolean(ParameterPack); 3285 ID.AddPointer(TTPDecl); 3286 } 3287 3288 static bool classof(const Type *T) { 3289 return T->getTypeClass() == TemplateTypeParm; 3290 } 3291 static bool classof(const TemplateTypeParmType *T) { return true; } 3292}; 3293 3294/// \brief Represents the result of substituting a type for a template 3295/// type parameter. 3296/// 3297/// Within an instantiated template, all template type parameters have 3298/// been replaced with these. They are used solely to record that a 3299/// type was originally written as a template type parameter; 3300/// therefore they are never canonical. 3301class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 3302 // The original type parameter. 3303 const TemplateTypeParmType *Replaced; 3304 3305 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 3306 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType(), 3307 Canon->isInstantiationDependentType(), 3308 Canon->isVariablyModifiedType(), 3309 Canon->containsUnexpandedParameterPack()), 3310 Replaced(Param) { } 3311 3312 friend class ASTContext; 3313 3314public: 3315 /// Gets the template parameter that was substituted for. 3316 const TemplateTypeParmType *getReplacedParameter() const { 3317 return Replaced; 3318 } 3319 3320 /// Gets the type that was substituted for the template 3321 /// parameter. 3322 QualType getReplacementType() const { 3323 return getCanonicalTypeInternal(); 3324 } 3325 3326 bool isSugared() const { return true; } 3327 QualType desugar() const { return getReplacementType(); } 3328 3329 void Profile(llvm::FoldingSetNodeID &ID) { 3330 Profile(ID, getReplacedParameter(), getReplacementType()); 3331 } 3332 static void Profile(llvm::FoldingSetNodeID &ID, 3333 const TemplateTypeParmType *Replaced, 3334 QualType Replacement) { 3335 ID.AddPointer(Replaced); 3336 ID.AddPointer(Replacement.getAsOpaquePtr()); 3337 } 3338 3339 static bool classof(const Type *T) { 3340 return T->getTypeClass() == SubstTemplateTypeParm; 3341 } 3342 static bool classof(const SubstTemplateTypeParmType *T) { return true; } 3343}; 3344 3345/// \brief Represents the result of substituting a set of types for a template 3346/// type parameter pack. 3347/// 3348/// When a pack expansion in the source code contains multiple parameter packs 3349/// and those parameter packs correspond to different levels of template 3350/// parameter lists, this type node is used to represent a template type 3351/// parameter pack from an outer level, which has already had its argument pack 3352/// substituted but that still lives within a pack expansion that itself 3353/// could not be instantiated. When actually performing a substitution into 3354/// that pack expansion (e.g., when all template parameters have corresponding 3355/// arguments), this type will be replaced with the \c SubstTemplateTypeParmType 3356/// at the current pack substitution index. 3357class SubstTemplateTypeParmPackType : public Type, public llvm::FoldingSetNode { 3358 /// \brief The original type parameter. 3359 const TemplateTypeParmType *Replaced; 3360 3361 /// \brief A pointer to the set of template arguments that this 3362 /// parameter pack is instantiated with. 3363 const TemplateArgument *Arguments; 3364 3365 /// \brief The number of template arguments in \c Arguments. 3366 unsigned NumArguments; 3367 3368 SubstTemplateTypeParmPackType(const TemplateTypeParmType *Param, 3369 QualType Canon, 3370 const TemplateArgument &ArgPack); 3371 3372 friend class ASTContext; 3373 3374public: 3375 IdentifierInfo *getIdentifier() const { return Replaced->getIdentifier(); } 3376 3377 /// Gets the template parameter that was substituted for. 3378 const TemplateTypeParmType *getReplacedParameter() const { 3379 return Replaced; 3380 } 3381 3382 bool isSugared() const { return false; } 3383 QualType desugar() const { return QualType(this, 0); } 3384 3385 TemplateArgument getArgumentPack() const; 3386 3387 void Profile(llvm::FoldingSetNodeID &ID); 3388 static void Profile(llvm::FoldingSetNodeID &ID, 3389 const TemplateTypeParmType *Replaced, 3390 const TemplateArgument &ArgPack); 3391 3392 static bool classof(const Type *T) { 3393 return T->getTypeClass() == SubstTemplateTypeParmPack; 3394 } 3395 static bool classof(const SubstTemplateTypeParmPackType *T) { return true; } 3396}; 3397 3398/// \brief Represents a C++0x auto type. 3399/// 3400/// These types are usually a placeholder for a deduced type. However, within 3401/// templates and before the initializer is attached, there is no deduced type 3402/// and an auto type is type-dependent and canonical. 3403class AutoType : public Type, public llvm::FoldingSetNode { 3404 AutoType(QualType DeducedType) 3405 : Type(Auto, DeducedType.isNull() ? QualType(this, 0) : DeducedType, 3406 /*Dependent=*/DeducedType.isNull(), 3407 /*InstantiationDependent=*/DeducedType.isNull(), 3408 /*VariablyModified=*/false, /*ContainsParameterPack=*/false) { 3409 assert((DeducedType.isNull() || !DeducedType->isDependentType()) && 3410 "deduced a dependent type for auto"); 3411 } 3412 3413 friend class ASTContext; // ASTContext creates these 3414 3415public: 3416 bool isSugared() const { return isDeduced(); } 3417 QualType desugar() const { return getCanonicalTypeInternal(); } 3418 3419 QualType getDeducedType() const { 3420 return isDeduced() ? getCanonicalTypeInternal() : QualType(); 3421 } 3422 bool isDeduced() const { 3423 return !isDependentType(); 3424 } 3425 3426 void Profile(llvm::FoldingSetNodeID &ID) { 3427 Profile(ID, getDeducedType()); 3428 } 3429 3430 static void Profile(llvm::FoldingSetNodeID &ID, 3431 QualType Deduced) { 3432 ID.AddPointer(Deduced.getAsOpaquePtr()); 3433 } 3434 3435 static bool classof(const Type *T) { 3436 return T->getTypeClass() == Auto; 3437 } 3438 static bool classof(const AutoType *T) { return true; } 3439}; 3440 3441/// \brief Represents a type template specialization; the template 3442/// must be a class template, a type alias template, or a template 3443/// template parameter. A template which cannot be resolved to one of 3444/// these, e.g. because it is written with a dependent scope 3445/// specifier, is instead represented as a 3446/// @c DependentTemplateSpecializationType. 3447/// 3448/// A non-dependent template specialization type is always "sugar", 3449/// typically for a @c RecordType. For example, a class template 3450/// specialization type of @c vector<int> will refer to a tag type for 3451/// the instantiation @c std::vector<int, std::allocator<int>> 3452/// 3453/// Template specializations are dependent if either the template or 3454/// any of the template arguments are dependent, in which case the 3455/// type may also be canonical. 3456/// 3457/// Instances of this type are allocated with a trailing array of 3458/// TemplateArguments, followed by a QualType representing the 3459/// non-canonical aliased type when the template is a type alias 3460/// template. 3461class TemplateSpecializationType 3462 : public Type, public llvm::FoldingSetNode { 3463 /// \brief The name of the template being specialized. This is 3464 /// either a TemplateName::Template (in which case it is a 3465 /// ClassTemplateDecl*, a TemplateTemplateParmDecl*, or a 3466 /// TypeAliasTemplateDecl*), a 3467 /// TemplateName::SubstTemplateTemplateParmPack, or a 3468 /// TemplateName::SubstTemplateTemplateParm (in which case the 3469 /// replacement must, recursively, be one of these). 3470 TemplateName Template; 3471 3472 /// \brief - The number of template arguments named in this class 3473 /// template specialization. 3474 unsigned NumArgs; 3475 3476 TemplateSpecializationType(TemplateName T, 3477 const TemplateArgument *Args, 3478 unsigned NumArgs, QualType Canon, 3479 QualType Aliased); 3480 3481 friend class ASTContext; // ASTContext creates these 3482 3483public: 3484 /// \brief Determine whether any of the given template arguments are 3485 /// dependent. 3486 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 3487 unsigned NumArgs, 3488 bool &InstantiationDependent); 3489 3490 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 3491 unsigned NumArgs, 3492 bool &InstantiationDependent); 3493 3494 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &, 3495 bool &InstantiationDependent); 3496 3497 /// \brief Print a template argument list, including the '<' and '>' 3498 /// enclosing the template arguments. 3499 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 3500 unsigned NumArgs, 3501 const PrintingPolicy &Policy, 3502 bool SkipBrackets = false); 3503 3504 static std::string PrintTemplateArgumentList(const TemplateArgumentLoc *Args, 3505 unsigned NumArgs, 3506 const PrintingPolicy &Policy); 3507 3508 static std::string PrintTemplateArgumentList(const TemplateArgumentListInfo &, 3509 const PrintingPolicy &Policy); 3510 3511 /// True if this template specialization type matches a current 3512 /// instantiation in the context in which it is found. 3513 bool isCurrentInstantiation() const { 3514 return isa<InjectedClassNameType>(getCanonicalTypeInternal()); 3515 } 3516 3517 /// True if this template specialization type is for a type alias 3518 /// template. 3519 bool isTypeAlias() const; 3520 /// Get the aliased type, if this is a specialization of a type alias 3521 /// template. 3522 QualType getAliasedType() const { 3523 assert(isTypeAlias() && "not a type alias template specialization"); 3524 return *reinterpret_cast<const QualType*>(end()); 3525 } 3526 3527 typedef const TemplateArgument * iterator; 3528 3529 iterator begin() const { return getArgs(); } 3530 iterator end() const; // defined inline in TemplateBase.h 3531 3532 /// \brief Retrieve the name of the template that we are specializing. 3533 TemplateName getTemplateName() const { return Template; } 3534 3535 /// \brief Retrieve the template arguments. 3536 const TemplateArgument *getArgs() const { 3537 return reinterpret_cast<const TemplateArgument *>(this + 1); 3538 } 3539 3540 /// \brief Retrieve the number of template arguments. 3541 unsigned getNumArgs() const { return NumArgs; } 3542 3543 /// \brief Retrieve a specific template argument as a type. 3544 /// \precondition @c isArgType(Arg) 3545 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 3546 3547 bool isSugared() const { 3548 return !isDependentType() || isCurrentInstantiation() || isTypeAlias(); 3549 } 3550 QualType desugar() const { return getCanonicalTypeInternal(); } 3551 3552 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) { 3553 Profile(ID, Template, getArgs(), NumArgs, Ctx); 3554 if (isTypeAlias()) 3555 getAliasedType().Profile(ID); 3556 } 3557 3558 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 3559 const TemplateArgument *Args, 3560 unsigned NumArgs, 3561 const ASTContext &Context); 3562 3563 static bool classof(const Type *T) { 3564 return T->getTypeClass() == TemplateSpecialization; 3565 } 3566 static bool classof(const TemplateSpecializationType *T) { return true; } 3567}; 3568 3569/// \brief The injected class name of a C++ class template or class 3570/// template partial specialization. Used to record that a type was 3571/// spelled with a bare identifier rather than as a template-id; the 3572/// equivalent for non-templated classes is just RecordType. 3573/// 3574/// Injected class name types are always dependent. Template 3575/// instantiation turns these into RecordTypes. 3576/// 3577/// Injected class name types are always canonical. This works 3578/// because it is impossible to compare an injected class name type 3579/// with the corresponding non-injected template type, for the same 3580/// reason that it is impossible to directly compare template 3581/// parameters from different dependent contexts: injected class name 3582/// types can only occur within the scope of a particular templated 3583/// declaration, and within that scope every template specialization 3584/// will canonicalize to the injected class name (when appropriate 3585/// according to the rules of the language). 3586class InjectedClassNameType : public Type { 3587 CXXRecordDecl *Decl; 3588 3589 /// The template specialization which this type represents. 3590 /// For example, in 3591 /// template <class T> class A { ... }; 3592 /// this is A<T>, whereas in 3593 /// template <class X, class Y> class A<B<X,Y> > { ... }; 3594 /// this is A<B<X,Y> >. 3595 /// 3596 /// It is always unqualified, always a template specialization type, 3597 /// and always dependent. 3598 QualType InjectedType; 3599 3600 friend class ASTContext; // ASTContext creates these. 3601 friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not 3602 // currently suitable for AST reading, too much 3603 // interdependencies. 3604 InjectedClassNameType(CXXRecordDecl *D, QualType TST) 3605 : Type(InjectedClassName, QualType(), /*Dependent=*/true, 3606 /*InstantiationDependent=*/true, 3607 /*VariablyModified=*/false, 3608 /*ContainsUnexpandedParameterPack=*/false), 3609 Decl(D), InjectedType(TST) { 3610 assert(isa<TemplateSpecializationType>(TST)); 3611 assert(!TST.hasQualifiers()); 3612 assert(TST->isDependentType()); 3613 } 3614 3615public: 3616 QualType getInjectedSpecializationType() const { return InjectedType; } 3617 const TemplateSpecializationType *getInjectedTST() const { 3618 return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); 3619 } 3620 3621 CXXRecordDecl *getDecl() const; 3622 3623 bool isSugared() const { return false; } 3624 QualType desugar() const { return QualType(this, 0); } 3625 3626 static bool classof(const Type *T) { 3627 return T->getTypeClass() == InjectedClassName; 3628 } 3629 static bool classof(const InjectedClassNameType *T) { return true; } 3630}; 3631 3632/// \brief The kind of a tag type. 3633enum TagTypeKind { 3634 /// \brief The "struct" keyword. 3635 TTK_Struct, 3636 /// \brief The "union" keyword. 3637 TTK_Union, 3638 /// \brief The "class" keyword. 3639 TTK_Class, 3640 /// \brief The "enum" keyword. 3641 TTK_Enum 3642}; 3643 3644/// \brief The elaboration keyword that precedes a qualified type name or 3645/// introduces an elaborated-type-specifier. 3646enum ElaboratedTypeKeyword { 3647 /// \brief The "struct" keyword introduces the elaborated-type-specifier. 3648 ETK_Struct, 3649 /// \brief The "union" keyword introduces the elaborated-type-specifier. 3650 ETK_Union, 3651 /// \brief The "class" keyword introduces the elaborated-type-specifier. 3652 ETK_Class, 3653 /// \brief The "enum" keyword introduces the elaborated-type-specifier. 3654 ETK_Enum, 3655 /// \brief The "typename" keyword precedes the qualified type name, e.g., 3656 /// \c typename T::type. 3657 ETK_Typename, 3658 /// \brief No keyword precedes the qualified type name. 3659 ETK_None 3660}; 3661 3662/// A helper class for Type nodes having an ElaboratedTypeKeyword. 3663/// The keyword in stored in the free bits of the base class. 3664/// Also provides a few static helpers for converting and printing 3665/// elaborated type keyword and tag type kind enumerations. 3666class TypeWithKeyword : public Type { 3667protected: 3668 TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, 3669 QualType Canonical, bool Dependent, 3670 bool InstantiationDependent, bool VariablyModified, 3671 bool ContainsUnexpandedParameterPack) 3672 : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified, 3673 ContainsUnexpandedParameterPack) { 3674 TypeWithKeywordBits.Keyword = Keyword; 3675 } 3676 3677public: 3678 ElaboratedTypeKeyword getKeyword() const { 3679 return static_cast<ElaboratedTypeKeyword>(TypeWithKeywordBits.Keyword); 3680 } 3681 3682 /// getKeywordForTypeSpec - Converts a type specifier (DeclSpec::TST) 3683 /// into an elaborated type keyword. 3684 static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); 3685 3686 /// getTagTypeKindForTypeSpec - Converts a type specifier (DeclSpec::TST) 3687 /// into a tag type kind. It is an error to provide a type specifier 3688 /// which *isn't* a tag kind here. 3689 static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); 3690 3691 /// getKeywordForTagDeclKind - Converts a TagTypeKind into an 3692 /// elaborated type keyword. 3693 static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); 3694 3695 /// getTagTypeKindForKeyword - Converts an elaborated type keyword into 3696 // a TagTypeKind. It is an error to provide an elaborated type keyword 3697 /// which *isn't* a tag kind here. 3698 static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); 3699 3700 static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); 3701 3702 static const char *getKeywordName(ElaboratedTypeKeyword Keyword); 3703 3704 static const char *getTagTypeKindName(TagTypeKind Kind) { 3705 return getKeywordName(getKeywordForTagTypeKind(Kind)); 3706 } 3707 3708 class CannotCastToThisType {}; 3709 static CannotCastToThisType classof(const Type *); 3710}; 3711 3712/// \brief Represents a type that was referred to using an elaborated type 3713/// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, 3714/// or both. 3715/// 3716/// This type is used to keep track of a type name as written in the 3717/// source code, including tag keywords and any nested-name-specifiers. 3718/// The type itself is always "sugar", used to express what was written 3719/// in the source code but containing no additional semantic information. 3720class ElaboratedType : public TypeWithKeyword, public llvm::FoldingSetNode { 3721 3722 /// \brief The nested name specifier containing the qualifier. 3723 NestedNameSpecifier *NNS; 3724 3725 /// \brief The type that this qualified name refers to. 3726 QualType NamedType; 3727 3728 ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3729 QualType NamedType, QualType CanonType) 3730 : TypeWithKeyword(Keyword, Elaborated, CanonType, 3731 NamedType->isDependentType(), 3732 NamedType->isInstantiationDependentType(), 3733 NamedType->isVariablyModifiedType(), 3734 NamedType->containsUnexpandedParameterPack()), 3735 NNS(NNS), NamedType(NamedType) { 3736 assert(!(Keyword == ETK_None && NNS == 0) && 3737 "ElaboratedType cannot have elaborated type keyword " 3738 "and name qualifier both null."); 3739 } 3740 3741 friend class ASTContext; // ASTContext creates these 3742 3743public: 3744 ~ElaboratedType(); 3745 3746 /// \brief Retrieve the qualification on this type. 3747 NestedNameSpecifier *getQualifier() const { return NNS; } 3748 3749 /// \brief Retrieve the type named by the qualified-id. 3750 QualType getNamedType() const { return NamedType; } 3751 3752 /// \brief Remove a single level of sugar. 3753 QualType desugar() const { return getNamedType(); } 3754 3755 /// \brief Returns whether this type directly provides sugar. 3756 bool isSugared() const { return true; } 3757 3758 void Profile(llvm::FoldingSetNodeID &ID) { 3759 Profile(ID, getKeyword(), NNS, NamedType); 3760 } 3761 3762 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3763 NestedNameSpecifier *NNS, QualType NamedType) { 3764 ID.AddInteger(Keyword); 3765 ID.AddPointer(NNS); 3766 NamedType.Profile(ID); 3767 } 3768 3769 static bool classof(const Type *T) { 3770 return T->getTypeClass() == Elaborated; 3771 } 3772 static bool classof(const ElaboratedType *T) { return true; } 3773}; 3774 3775/// \brief Represents a qualified type name for which the type name is 3776/// dependent. 3777/// 3778/// DependentNameType represents a class of dependent types that involve a 3779/// dependent nested-name-specifier (e.g., "T::") followed by a (dependent) 3780/// name of a type. The DependentNameType may start with a "typename" (for a 3781/// typename-specifier), "class", "struct", "union", or "enum" (for a 3782/// dependent elaborated-type-specifier), or nothing (in contexts where we 3783/// know that we must be referring to a type, e.g., in a base class specifier). 3784class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { 3785 3786 /// \brief The nested name specifier containing the qualifier. 3787 NestedNameSpecifier *NNS; 3788 3789 /// \brief The type that this typename specifier refers to. 3790 const IdentifierInfo *Name; 3791 3792 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3793 const IdentifierInfo *Name, QualType CanonType) 3794 : TypeWithKeyword(Keyword, DependentName, CanonType, /*Dependent=*/true, 3795 /*InstantiationDependent=*/true, 3796 /*VariablyModified=*/false, 3797 NNS->containsUnexpandedParameterPack()), 3798 NNS(NNS), Name(Name) { 3799 assert(NNS->isDependent() && 3800 "DependentNameType requires a dependent nested-name-specifier"); 3801 } 3802 3803 friend class ASTContext; // ASTContext creates these 3804 3805public: 3806 /// \brief Retrieve the qualification on this type. 3807 NestedNameSpecifier *getQualifier() const { return NNS; } 3808 3809 /// \brief Retrieve the type named by the typename specifier as an 3810 /// identifier. 3811 /// 3812 /// This routine will return a non-NULL identifier pointer when the 3813 /// form of the original typename was terminated by an identifier, 3814 /// e.g., "typename T::type". 3815 const IdentifierInfo *getIdentifier() const { 3816 return Name; 3817 } 3818 3819 bool isSugared() const { return false; } 3820 QualType desugar() const { return QualType(this, 0); } 3821 3822 void Profile(llvm::FoldingSetNodeID &ID) { 3823 Profile(ID, getKeyword(), NNS, Name); 3824 } 3825 3826 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3827 NestedNameSpecifier *NNS, const IdentifierInfo *Name) { 3828 ID.AddInteger(Keyword); 3829 ID.AddPointer(NNS); 3830 ID.AddPointer(Name); 3831 } 3832 3833 static bool classof(const Type *T) { 3834 return T->getTypeClass() == DependentName; 3835 } 3836 static bool classof(const DependentNameType *T) { return true; } 3837}; 3838 3839/// DependentTemplateSpecializationType - Represents a template 3840/// specialization type whose template cannot be resolved, e.g. 3841/// A<T>::template B<T> 3842class DependentTemplateSpecializationType : 3843 public TypeWithKeyword, public llvm::FoldingSetNode { 3844 3845 /// \brief The nested name specifier containing the qualifier. 3846 NestedNameSpecifier *NNS; 3847 3848 /// \brief The identifier of the template. 3849 const IdentifierInfo *Name; 3850 3851 /// \brief - The number of template arguments named in this class 3852 /// template specialization. 3853 unsigned NumArgs; 3854 3855 const TemplateArgument *getArgBuffer() const { 3856 return reinterpret_cast<const TemplateArgument*>(this+1); 3857 } 3858 TemplateArgument *getArgBuffer() { 3859 return reinterpret_cast<TemplateArgument*>(this+1); 3860 } 3861 3862 DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 3863 NestedNameSpecifier *NNS, 3864 const IdentifierInfo *Name, 3865 unsigned NumArgs, 3866 const TemplateArgument *Args, 3867 QualType Canon); 3868 3869 friend class ASTContext; // ASTContext creates these 3870 3871public: 3872 NestedNameSpecifier *getQualifier() const { return NNS; } 3873 const IdentifierInfo *getIdentifier() const { return Name; } 3874 3875 /// \brief Retrieve the template arguments. 3876 const TemplateArgument *getArgs() const { 3877 return getArgBuffer(); 3878 } 3879 3880 /// \brief Retrieve the number of template arguments. 3881 unsigned getNumArgs() const { return NumArgs; } 3882 3883 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 3884 3885 typedef const TemplateArgument * iterator; 3886 iterator begin() const { return getArgs(); } 3887 iterator end() const; // inline in TemplateBase.h 3888 3889 bool isSugared() const { return false; } 3890 QualType desugar() const { return QualType(this, 0); } 3891 3892 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) { 3893 Profile(ID, Context, getKeyword(), NNS, Name, NumArgs, getArgs()); 3894 } 3895 3896 static void Profile(llvm::FoldingSetNodeID &ID, 3897 const ASTContext &Context, 3898 ElaboratedTypeKeyword Keyword, 3899 NestedNameSpecifier *Qualifier, 3900 const IdentifierInfo *Name, 3901 unsigned NumArgs, 3902 const TemplateArgument *Args); 3903 3904 static bool classof(const Type *T) { 3905 return T->getTypeClass() == DependentTemplateSpecialization; 3906 } 3907 static bool classof(const DependentTemplateSpecializationType *T) { 3908 return true; 3909 } 3910}; 3911 3912/// \brief Represents a pack expansion of types. 3913/// 3914/// Pack expansions are part of C++0x variadic templates. A pack 3915/// expansion contains a pattern, which itself contains one or more 3916/// "unexpanded" parameter packs. When instantiated, a pack expansion 3917/// produces a series of types, each instantiated from the pattern of 3918/// the expansion, where the Ith instantiation of the pattern uses the 3919/// Ith arguments bound to each of the unexpanded parameter packs. The 3920/// pack expansion is considered to "expand" these unexpanded 3921/// parameter packs. 3922/// 3923/// \code 3924/// template<typename ...Types> struct tuple; 3925/// 3926/// template<typename ...Types> 3927/// struct tuple_of_references { 3928/// typedef tuple<Types&...> type; 3929/// }; 3930/// \endcode 3931/// 3932/// Here, the pack expansion \c Types&... is represented via a 3933/// PackExpansionType whose pattern is Types&. 3934class PackExpansionType : public Type, public llvm::FoldingSetNode { 3935 /// \brief The pattern of the pack expansion. 3936 QualType Pattern; 3937 3938 /// \brief The number of expansions that this pack expansion will 3939 /// generate when substituted (+1), or indicates that 3940 /// 3941 /// This field will only have a non-zero value when some of the parameter 3942 /// packs that occur within the pattern have been substituted but others have 3943 /// not. 3944 unsigned NumExpansions; 3945 3946 PackExpansionType(QualType Pattern, QualType Canon, 3947 llvm::Optional<unsigned> NumExpansions) 3948 : Type(PackExpansion, Canon, /*Dependent=*/true, 3949 /*InstantiationDependent=*/true, 3950 /*VariableModified=*/Pattern->isVariablyModifiedType(), 3951 /*ContainsUnexpandedParameterPack=*/false), 3952 Pattern(Pattern), 3953 NumExpansions(NumExpansions? *NumExpansions + 1: 0) { } 3954 3955 friend class ASTContext; // ASTContext creates these 3956 3957public: 3958 /// \brief Retrieve the pattern of this pack expansion, which is the 3959 /// type that will be repeatedly instantiated when instantiating the 3960 /// pack expansion itself. 3961 QualType getPattern() const { return Pattern; } 3962 3963 /// \brief Retrieve the number of expansions that this pack expansion will 3964 /// generate, if known. 3965 llvm::Optional<unsigned> getNumExpansions() const { 3966 if (NumExpansions) 3967 return NumExpansions - 1; 3968 3969 return llvm::Optional<unsigned>(); 3970 } 3971 3972 bool isSugared() const { return false; } 3973 QualType desugar() const { return QualType(this, 0); } 3974 3975 void Profile(llvm::FoldingSetNodeID &ID) { 3976 Profile(ID, getPattern(), getNumExpansions()); 3977 } 3978 3979 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pattern, 3980 llvm::Optional<unsigned> NumExpansions) { 3981 ID.AddPointer(Pattern.getAsOpaquePtr()); 3982 ID.AddBoolean(NumExpansions); 3983 if (NumExpansions) 3984 ID.AddInteger(*NumExpansions); 3985 } 3986 3987 static bool classof(const Type *T) { 3988 return T->getTypeClass() == PackExpansion; 3989 } 3990 static bool classof(const PackExpansionType *T) { 3991 return true; 3992 } 3993}; 3994 3995/// ObjCObjectType - Represents a class type in Objective C. 3996/// Every Objective C type is a combination of a base type and a 3997/// list of protocols. 3998/// 3999/// Given the following declarations: 4000/// @class C; 4001/// @protocol P; 4002/// 4003/// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType 4004/// with base C and no protocols. 4005/// 4006/// 'C<P>' is an ObjCObjectType with base C and protocol list [P]. 4007/// 4008/// 'id' is a TypedefType which is sugar for an ObjCPointerType whose 4009/// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType 4010/// and no protocols. 4011/// 4012/// 'id<P>' is an ObjCPointerType whose pointee is an ObjCObjecType 4013/// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually 4014/// this should get its own sugar class to better represent the source. 4015class ObjCObjectType : public Type { 4016 // ObjCObjectType.NumProtocols - the number of protocols stored 4017 // after the ObjCObjectPointerType node. 4018 // 4019 // These protocols are those written directly on the type. If 4020 // protocol qualifiers ever become additive, the iterators will need 4021 // to get kindof complicated. 4022 // 4023 // In the canonical object type, these are sorted alphabetically 4024 // and uniqued. 4025 4026 /// Either a BuiltinType or an InterfaceType or sugar for either. 4027 QualType BaseType; 4028 4029 ObjCProtocolDecl * const *getProtocolStorage() const { 4030 return const_cast<ObjCObjectType*>(this)->getProtocolStorage(); 4031 } 4032 4033 ObjCProtocolDecl **getProtocolStorage(); 4034 4035protected: 4036 ObjCObjectType(QualType Canonical, QualType Base, 4037 ObjCProtocolDecl * const *Protocols, unsigned NumProtocols); 4038 4039 enum Nonce_ObjCInterface { Nonce_ObjCInterface }; 4040 ObjCObjectType(enum Nonce_ObjCInterface) 4041 : Type(ObjCInterface, QualType(), false, false, false, false), 4042 BaseType(QualType(this_(), 0)) { 4043 ObjCObjectTypeBits.NumProtocols = 0; 4044 } 4045 4046public: 4047 /// getBaseType - Gets the base type of this object type. This is 4048 /// always (possibly sugar for) one of: 4049 /// - the 'id' builtin type (as opposed to the 'id' type visible to the 4050 /// user, which is a typedef for an ObjCPointerType) 4051 /// - the 'Class' builtin type (same caveat) 4052 /// - an ObjCObjectType (currently always an ObjCInterfaceType) 4053 QualType getBaseType() const { return BaseType; } 4054 4055 bool isObjCId() const { 4056 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); 4057 } 4058 bool isObjCClass() const { 4059 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); 4060 } 4061 bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } 4062 bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } 4063 bool isObjCUnqualifiedIdOrClass() const { 4064 if (!qual_empty()) return false; 4065 if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) 4066 return T->getKind() == BuiltinType::ObjCId || 4067 T->getKind() == BuiltinType::ObjCClass; 4068 return false; 4069 } 4070 bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } 4071 bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } 4072 4073 /// Gets the interface declaration for this object type, if the base type 4074 /// really is an interface. 4075 ObjCInterfaceDecl *getInterface() const; 4076 4077 typedef ObjCProtocolDecl * const *qual_iterator; 4078 4079 qual_iterator qual_begin() const { return getProtocolStorage(); } 4080 qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } 4081 4082 bool qual_empty() const { return getNumProtocols() == 0; } 4083 4084 /// getNumProtocols - Return the number of qualifying protocols in this 4085 /// interface type, or 0 if there are none. 4086 unsigned getNumProtocols() const { return ObjCObjectTypeBits.NumProtocols; } 4087 4088 /// \brief Fetch a protocol by index. 4089 ObjCProtocolDecl *getProtocol(unsigned I) const { 4090 assert(I < getNumProtocols() && "Out-of-range protocol access"); 4091 return qual_begin()[I]; 4092 } 4093 4094 bool isSugared() const { return false; } 4095 QualType desugar() const { return QualType(this, 0); } 4096 4097 static bool classof(const Type *T) { 4098 return T->getTypeClass() == ObjCObject || 4099 T->getTypeClass() == ObjCInterface; 4100 } 4101 static bool classof(const ObjCObjectType *) { return true; } 4102}; 4103 4104/// ObjCObjectTypeImpl - A class providing a concrete implementation 4105/// of ObjCObjectType, so as to not increase the footprint of 4106/// ObjCInterfaceType. Code outside of ASTContext and the core type 4107/// system should not reference this type. 4108class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { 4109 friend class ASTContext; 4110 4111 // If anyone adds fields here, ObjCObjectType::getProtocolStorage() 4112 // will need to be modified. 4113 4114 ObjCObjectTypeImpl(QualType Canonical, QualType Base, 4115 ObjCProtocolDecl * const *Protocols, 4116 unsigned NumProtocols) 4117 : ObjCObjectType(Canonical, Base, Protocols, NumProtocols) {} 4118 4119public: 4120 void Profile(llvm::FoldingSetNodeID &ID); 4121 static void Profile(llvm::FoldingSetNodeID &ID, 4122 QualType Base, 4123 ObjCProtocolDecl *const *protocols, 4124 unsigned NumProtocols); 4125}; 4126 4127inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorage() { 4128 return reinterpret_cast<ObjCProtocolDecl**>( 4129 static_cast<ObjCObjectTypeImpl*>(this) + 1); 4130} 4131 4132/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 4133/// object oriented design. They basically correspond to C++ classes. There 4134/// are two kinds of interface types, normal interfaces like "NSString" and 4135/// qualified interfaces, which are qualified with a protocol list like 4136/// "NSString<NSCopyable, NSAmazing>". 4137/// 4138/// ObjCInterfaceType guarantees the following properties when considered 4139/// as a subtype of its superclass, ObjCObjectType: 4140/// - There are no protocol qualifiers. To reinforce this, code which 4141/// tries to invoke the protocol methods via an ObjCInterfaceType will 4142/// fail to compile. 4143/// - It is its own base type. That is, if T is an ObjCInterfaceType*, 4144/// T->getBaseType() == QualType(T, 0). 4145class ObjCInterfaceType : public ObjCObjectType { 4146 mutable ObjCInterfaceDecl *Decl; 4147 4148 ObjCInterfaceType(const ObjCInterfaceDecl *D) 4149 : ObjCObjectType(Nonce_ObjCInterface), 4150 Decl(const_cast<ObjCInterfaceDecl*>(D)) {} 4151 friend class ASTContext; // ASTContext creates these. 4152 friend class ObjCInterfaceDecl; 4153 4154public: 4155 /// getDecl - Get the declaration of this interface. 4156 ObjCInterfaceDecl *getDecl() const { return Decl; } 4157 4158 bool isSugared() const { return false; } 4159 QualType desugar() const { return QualType(this, 0); } 4160 4161 static bool classof(const Type *T) { 4162 return T->getTypeClass() == ObjCInterface; 4163 } 4164 static bool classof(const ObjCInterfaceType *) { return true; } 4165 4166 // Nonsense to "hide" certain members of ObjCObjectType within this 4167 // class. People asking for protocols on an ObjCInterfaceType are 4168 // not going to get what they want: ObjCInterfaceTypes are 4169 // guaranteed to have no protocols. 4170 enum { 4171 qual_iterator, 4172 qual_begin, 4173 qual_end, 4174 getNumProtocols, 4175 getProtocol 4176 }; 4177}; 4178 4179inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { 4180 if (const ObjCInterfaceType *T = 4181 getBaseType()->getAs<ObjCInterfaceType>()) 4182 return T->getDecl(); 4183 return 0; 4184} 4185 4186/// ObjCObjectPointerType - Used to represent a pointer to an 4187/// Objective C object. These are constructed from pointer 4188/// declarators when the pointee type is an ObjCObjectType (or sugar 4189/// for one). In addition, the 'id' and 'Class' types are typedefs 4190/// for these, and the protocol-qualified types 'id<P>' and 'Class<P>' 4191/// are translated into these. 4192/// 4193/// Pointers to pointers to Objective C objects are still PointerTypes; 4194/// only the first level of pointer gets it own type implementation. 4195class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 4196 QualType PointeeType; 4197 4198 ObjCObjectPointerType(QualType Canonical, QualType Pointee) 4199 : Type(ObjCObjectPointer, Canonical, false, false, false, false), 4200 PointeeType(Pointee) {} 4201 friend class ASTContext; // ASTContext creates these. 4202 4203public: 4204 /// getPointeeType - Gets the type pointed to by this ObjC pointer. 4205 /// The result will always be an ObjCObjectType or sugar thereof. 4206 QualType getPointeeType() const { return PointeeType; } 4207 4208 /// getObjCObjectType - Gets the type pointed to by this ObjC 4209 /// pointer. This method always returns non-null. 4210 /// 4211 /// This method is equivalent to getPointeeType() except that 4212 /// it discards any typedefs (or other sugar) between this 4213 /// type and the "outermost" object type. So for: 4214 /// @class A; @protocol P; @protocol Q; 4215 /// typedef A<P> AP; 4216 /// typedef A A1; 4217 /// typedef A1<P> A1P; 4218 /// typedef A1P<Q> A1PQ; 4219 /// For 'A*', getObjectType() will return 'A'. 4220 /// For 'A<P>*', getObjectType() will return 'A<P>'. 4221 /// For 'AP*', getObjectType() will return 'A<P>'. 4222 /// For 'A1*', getObjectType() will return 'A'. 4223 /// For 'A1<P>*', getObjectType() will return 'A1<P>'. 4224 /// For 'A1P*', getObjectType() will return 'A1<P>'. 4225 /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because 4226 /// adding protocols to a protocol-qualified base discards the 4227 /// old qualifiers (for now). But if it didn't, getObjectType() 4228 /// would return 'A1P<Q>' (and we'd have to make iterating over 4229 /// qualifiers more complicated). 4230 const ObjCObjectType *getObjectType() const { 4231 return PointeeType->castAs<ObjCObjectType>(); 4232 } 4233 4234 /// getInterfaceType - If this pointer points to an Objective C 4235 /// @interface type, gets the type for that interface. Any protocol 4236 /// qualifiers on the interface are ignored. 4237 /// 4238 /// \return null if the base type for this pointer is 'id' or 'Class' 4239 const ObjCInterfaceType *getInterfaceType() const { 4240 return getObjectType()->getBaseType()->getAs<ObjCInterfaceType>(); 4241 } 4242 4243 /// getInterfaceDecl - If this pointer points to an Objective @interface 4244 /// type, gets the declaration for that interface. 4245 /// 4246 /// \return null if the base type for this pointer is 'id' or 'Class' 4247 ObjCInterfaceDecl *getInterfaceDecl() const { 4248 return getObjectType()->getInterface(); 4249 } 4250 4251 /// isObjCIdType - True if this is equivalent to the 'id' type, i.e. if 4252 /// its object type is the primitive 'id' type with no protocols. 4253 bool isObjCIdType() const { 4254 return getObjectType()->isObjCUnqualifiedId(); 4255 } 4256 4257 /// isObjCClassType - True if this is equivalent to the 'Class' type, 4258 /// i.e. if its object tive is the primitive 'Class' type with no protocols. 4259 bool isObjCClassType() const { 4260 return getObjectType()->isObjCUnqualifiedClass(); 4261 } 4262 4263 /// isObjCQualifiedIdType - True if this is equivalent to 'id<P>' for some 4264 /// non-empty set of protocols. 4265 bool isObjCQualifiedIdType() const { 4266 return getObjectType()->isObjCQualifiedId(); 4267 } 4268 4269 /// isObjCQualifiedClassType - True if this is equivalent to 'Class<P>' for 4270 /// some non-empty set of protocols. 4271 bool isObjCQualifiedClassType() const { 4272 return getObjectType()->isObjCQualifiedClass(); 4273 } 4274 4275 /// An iterator over the qualifiers on the object type. Provided 4276 /// for convenience. This will always iterate over the full set of 4277 /// protocols on a type, not just those provided directly. 4278 typedef ObjCObjectType::qual_iterator qual_iterator; 4279 4280 qual_iterator qual_begin() const { 4281 return getObjectType()->qual_begin(); 4282 } 4283 qual_iterator qual_end() const { 4284 return getObjectType()->qual_end(); 4285 } 4286 bool qual_empty() const { return getObjectType()->qual_empty(); } 4287 4288 /// getNumProtocols - Return the number of qualifying protocols on 4289 /// the object type. 4290 unsigned getNumProtocols() const { 4291 return getObjectType()->getNumProtocols(); 4292 } 4293 4294 /// \brief Retrieve a qualifying protocol by index on the object 4295 /// type. 4296 ObjCProtocolDecl *getProtocol(unsigned I) const { 4297 return getObjectType()->getProtocol(I); 4298 } 4299 4300 bool isSugared() const { return false; } 4301 QualType desugar() const { return QualType(this, 0); } 4302 4303 void Profile(llvm::FoldingSetNodeID &ID) { 4304 Profile(ID, getPointeeType()); 4305 } 4306 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 4307 ID.AddPointer(T.getAsOpaquePtr()); 4308 } 4309 static bool classof(const Type *T) { 4310 return T->getTypeClass() == ObjCObjectPointer; 4311 } 4312 static bool classof(const ObjCObjectPointerType *) { return true; } 4313}; 4314 4315class AtomicType : public Type, public llvm::FoldingSetNode { 4316 QualType ValueType; 4317 4318 AtomicType(QualType ValTy, QualType Canonical) 4319 : Type(Atomic, Canonical, ValTy->isDependentType(), 4320 ValTy->isInstantiationDependentType(), 4321 ValTy->isVariablyModifiedType(), 4322 ValTy->containsUnexpandedParameterPack()), 4323 ValueType(ValTy) {} 4324 friend class ASTContext; // ASTContext creates these. 4325 4326 public: 4327 /// getValueType - Gets the type contained by this atomic type, i.e. 4328 /// the type returned by performing an atomic load of this atomic type. 4329 QualType getValueType() const { return ValueType; } 4330 4331 bool isSugared() const { return false; } 4332 QualType desugar() const { return QualType(this, 0); } 4333 4334 void Profile(llvm::FoldingSetNodeID &ID) { 4335 Profile(ID, getValueType()); 4336 } 4337 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 4338 ID.AddPointer(T.getAsOpaquePtr()); 4339 } 4340 static bool classof(const Type *T) { 4341 return T->getTypeClass() == Atomic; 4342 } 4343 static bool classof(const AtomicType *) { return true; } 4344}; 4345 4346/// A qualifier set is used to build a set of qualifiers. 4347class QualifierCollector : public Qualifiers { 4348public: 4349 QualifierCollector(Qualifiers Qs = Qualifiers()) : Qualifiers(Qs) {} 4350 4351 /// Collect any qualifiers on the given type and return an 4352 /// unqualified type. The qualifiers are assumed to be consistent 4353 /// with those already in the type. 4354 const Type *strip(QualType type) { 4355 addFastQualifiers(type.getLocalFastQualifiers()); 4356 if (!type.hasLocalNonFastQualifiers()) 4357 return type.getTypePtrUnsafe(); 4358 4359 const ExtQuals *extQuals = type.getExtQualsUnsafe(); 4360 addConsistentQualifiers(extQuals->getQualifiers()); 4361 return extQuals->getBaseType(); 4362 } 4363 4364 /// Apply the collected qualifiers to the given type. 4365 QualType apply(const ASTContext &Context, QualType QT) const; 4366 4367 /// Apply the collected qualifiers to the given type. 4368 QualType apply(const ASTContext &Context, const Type* T) const; 4369}; 4370 4371 4372// Inline function definitions. 4373 4374inline const Type *QualType::getTypePtr() const { 4375 return getCommonPtr()->BaseType; 4376} 4377 4378inline const Type *QualType::getTypePtrOrNull() const { 4379 return (isNull() ? 0 : getCommonPtr()->BaseType); 4380} 4381 4382inline SplitQualType QualType::split() const { 4383 if (!hasLocalNonFastQualifiers()) 4384 return SplitQualType(getTypePtrUnsafe(), 4385 Qualifiers::fromFastMask(getLocalFastQualifiers())); 4386 4387 const ExtQuals *eq = getExtQualsUnsafe(); 4388 Qualifiers qs = eq->getQualifiers(); 4389 qs.addFastQualifiers(getLocalFastQualifiers()); 4390 return SplitQualType(eq->getBaseType(), qs); 4391} 4392 4393inline Qualifiers QualType::getLocalQualifiers() const { 4394 Qualifiers Quals; 4395 if (hasLocalNonFastQualifiers()) 4396 Quals = getExtQualsUnsafe()->getQualifiers(); 4397 Quals.addFastQualifiers(getLocalFastQualifiers()); 4398 return Quals; 4399} 4400 4401inline Qualifiers QualType::getQualifiers() const { 4402 Qualifiers quals = getCommonPtr()->CanonicalType.getLocalQualifiers(); 4403 quals.addFastQualifiers(getLocalFastQualifiers()); 4404 return quals; 4405} 4406 4407inline unsigned QualType::getCVRQualifiers() const { 4408 unsigned cvr = getCommonPtr()->CanonicalType.getLocalCVRQualifiers(); 4409 cvr |= getLocalCVRQualifiers(); 4410 return cvr; 4411} 4412 4413inline QualType QualType::getCanonicalType() const { 4414 QualType canon = getCommonPtr()->CanonicalType; 4415 return canon.withFastQualifiers(getLocalFastQualifiers()); 4416} 4417 4418inline bool QualType::isCanonical() const { 4419 return getTypePtr()->isCanonicalUnqualified(); 4420} 4421 4422inline bool QualType::isCanonicalAsParam() const { 4423 if (!isCanonical()) return false; 4424 if (hasLocalQualifiers()) return false; 4425 4426 const Type *T = getTypePtr(); 4427 if (T->isVariablyModifiedType() && T->hasSizedVLAType()) 4428 return false; 4429 4430 return !isa<FunctionType>(T) && !isa<ArrayType>(T); 4431} 4432 4433inline bool QualType::isConstQualified() const { 4434 return isLocalConstQualified() || 4435 getCommonPtr()->CanonicalType.isLocalConstQualified(); 4436} 4437 4438inline bool QualType::isRestrictQualified() const { 4439 return isLocalRestrictQualified() || 4440 getCommonPtr()->CanonicalType.isLocalRestrictQualified(); 4441} 4442 4443 4444inline bool QualType::isVolatileQualified() const { 4445 return isLocalVolatileQualified() || 4446 getCommonPtr()->CanonicalType.isLocalVolatileQualified(); 4447} 4448 4449inline bool QualType::hasQualifiers() const { 4450 return hasLocalQualifiers() || 4451 getCommonPtr()->CanonicalType.hasLocalQualifiers(); 4452} 4453 4454inline QualType QualType::getUnqualifiedType() const { 4455 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4456 return QualType(getTypePtr(), 0); 4457 4458 return QualType(getSplitUnqualifiedTypeImpl(*this).first, 0); 4459} 4460 4461inline SplitQualType QualType::getSplitUnqualifiedType() const { 4462 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4463 return split(); 4464 4465 return getSplitUnqualifiedTypeImpl(*this); 4466} 4467 4468inline void QualType::removeLocalConst() { 4469 removeLocalFastQualifiers(Qualifiers::Const); 4470} 4471 4472inline void QualType::removeLocalRestrict() { 4473 removeLocalFastQualifiers(Qualifiers::Restrict); 4474} 4475 4476inline void QualType::removeLocalVolatile() { 4477 removeLocalFastQualifiers(Qualifiers::Volatile); 4478} 4479 4480inline void QualType::removeLocalCVRQualifiers(unsigned Mask) { 4481 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 4482 assert((int)Qualifiers::CVRMask == (int)Qualifiers::FastMask); 4483 4484 // Fast path: we don't need to touch the slow qualifiers. 4485 removeLocalFastQualifiers(Mask); 4486} 4487 4488/// getAddressSpace - Return the address space of this type. 4489inline unsigned QualType::getAddressSpace() const { 4490 return getQualifiers().getAddressSpace(); 4491} 4492 4493/// getObjCGCAttr - Return the gc attribute of this type. 4494inline Qualifiers::GC QualType::getObjCGCAttr() const { 4495 return getQualifiers().getObjCGCAttr(); 4496} 4497 4498inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { 4499 if (const PointerType *PT = t.getAs<PointerType>()) { 4500 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 4501 return FT->getExtInfo(); 4502 } else if (const FunctionType *FT = t.getAs<FunctionType>()) 4503 return FT->getExtInfo(); 4504 4505 return FunctionType::ExtInfo(); 4506} 4507 4508inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { 4509 return getFunctionExtInfo(*t); 4510} 4511 4512/// isMoreQualifiedThan - Determine whether this type is more 4513/// qualified than the Other type. For example, "const volatile int" 4514/// is more qualified than "const int", "volatile int", and 4515/// "int". However, it is not more qualified than "const volatile 4516/// int". 4517inline bool QualType::isMoreQualifiedThan(QualType other) const { 4518 Qualifiers myQuals = getQualifiers(); 4519 Qualifiers otherQuals = other.getQualifiers(); 4520 return (myQuals != otherQuals && myQuals.compatiblyIncludes(otherQuals)); 4521} 4522 4523/// isAtLeastAsQualifiedAs - Determine whether this type is at last 4524/// as qualified as the Other type. For example, "const volatile 4525/// int" is at least as qualified as "const int", "volatile int", 4526/// "int", and "const volatile int". 4527inline bool QualType::isAtLeastAsQualifiedAs(QualType other) const { 4528 return getQualifiers().compatiblyIncludes(other.getQualifiers()); 4529} 4530 4531/// getNonReferenceType - If Type is a reference type (e.g., const 4532/// int&), returns the type that the reference refers to ("const 4533/// int"). Otherwise, returns the type itself. This routine is used 4534/// throughout Sema to implement C++ 5p6: 4535/// 4536/// If an expression initially has the type "reference to T" (8.3.2, 4537/// 8.5.3), the type is adjusted to "T" prior to any further 4538/// analysis, the expression designates the object or function 4539/// denoted by the reference, and the expression is an lvalue. 4540inline QualType QualType::getNonReferenceType() const { 4541 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 4542 return RefType->getPointeeType(); 4543 else 4544 return *this; 4545} 4546 4547inline bool QualType::isCForbiddenLValueType() const { 4548 return ((getTypePtr()->isVoidType() && !hasQualifiers()) || 4549 getTypePtr()->isFunctionType()); 4550} 4551 4552/// \brief Tests whether the type is categorized as a fundamental type. 4553/// 4554/// \returns True for types specified in C++0x [basic.fundamental]. 4555inline bool Type::isFundamentalType() const { 4556 return isVoidType() || 4557 // FIXME: It's really annoying that we don't have an 4558 // 'isArithmeticType()' which agrees with the standard definition. 4559 (isArithmeticType() && !isEnumeralType()); 4560} 4561 4562/// \brief Tests whether the type is categorized as a compound type. 4563/// 4564/// \returns True for types specified in C++0x [basic.compound]. 4565inline bool Type::isCompoundType() const { 4566 // C++0x [basic.compound]p1: 4567 // Compound types can be constructed in the following ways: 4568 // -- arrays of objects of a given type [...]; 4569 return isArrayType() || 4570 // -- functions, which have parameters of given types [...]; 4571 isFunctionType() || 4572 // -- pointers to void or objects or functions [...]; 4573 isPointerType() || 4574 // -- references to objects or functions of a given type. [...] 4575 isReferenceType() || 4576 // -- classes containing a sequence of objects of various types, [...]; 4577 isRecordType() || 4578 // -- unions, which are classes capable of containing objects of different 4579 // types at different times; 4580 isUnionType() || 4581 // -- enumerations, which comprise a set of named constant values. [...]; 4582 isEnumeralType() || 4583 // -- pointers to non-static class members, [...]. 4584 isMemberPointerType(); 4585} 4586 4587inline bool Type::isFunctionType() const { 4588 return isa<FunctionType>(CanonicalType); 4589} 4590inline bool Type::isPointerType() const { 4591 return isa<PointerType>(CanonicalType); 4592} 4593inline bool Type::isAnyPointerType() const { 4594 return isPointerType() || isObjCObjectPointerType(); 4595} 4596inline bool Type::isBlockPointerType() const { 4597 return isa<BlockPointerType>(CanonicalType); 4598} 4599inline bool Type::isReferenceType() const { 4600 return isa<ReferenceType>(CanonicalType); 4601} 4602inline bool Type::isLValueReferenceType() const { 4603 return isa<LValueReferenceType>(CanonicalType); 4604} 4605inline bool Type::isRValueReferenceType() const { 4606 return isa<RValueReferenceType>(CanonicalType); 4607} 4608inline bool Type::isFunctionPointerType() const { 4609 if (const PointerType *T = getAs<PointerType>()) 4610 return T->getPointeeType()->isFunctionType(); 4611 else 4612 return false; 4613} 4614inline bool Type::isMemberPointerType() const { 4615 return isa<MemberPointerType>(CanonicalType); 4616} 4617inline bool Type::isMemberFunctionPointerType() const { 4618 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4619 return T->isMemberFunctionPointer(); 4620 else 4621 return false; 4622} 4623inline bool Type::isMemberDataPointerType() const { 4624 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4625 return T->isMemberDataPointer(); 4626 else 4627 return false; 4628} 4629inline bool Type::isArrayType() const { 4630 return isa<ArrayType>(CanonicalType); 4631} 4632inline bool Type::isConstantArrayType() const { 4633 return isa<ConstantArrayType>(CanonicalType); 4634} 4635inline bool Type::isIncompleteArrayType() const { 4636 return isa<IncompleteArrayType>(CanonicalType); 4637} 4638inline bool Type::isVariableArrayType() const { 4639 return isa<VariableArrayType>(CanonicalType); 4640} 4641inline bool Type::isDependentSizedArrayType() const { 4642 return isa<DependentSizedArrayType>(CanonicalType); 4643} 4644inline bool Type::isBuiltinType() const { 4645 return isa<BuiltinType>(CanonicalType); 4646} 4647inline bool Type::isRecordType() const { 4648 return isa<RecordType>(CanonicalType); 4649} 4650inline bool Type::isEnumeralType() const { 4651 return isa<EnumType>(CanonicalType); 4652} 4653inline bool Type::isAnyComplexType() const { 4654 return isa<ComplexType>(CanonicalType); 4655} 4656inline bool Type::isVectorType() const { 4657 return isa<VectorType>(CanonicalType); 4658} 4659inline bool Type::isExtVectorType() const { 4660 return isa<ExtVectorType>(CanonicalType); 4661} 4662inline bool Type::isObjCObjectPointerType() const { 4663 return isa<ObjCObjectPointerType>(CanonicalType); 4664} 4665inline bool Type::isObjCObjectType() const { 4666 return isa<ObjCObjectType>(CanonicalType); 4667} 4668inline bool Type::isObjCObjectOrInterfaceType() const { 4669 return isa<ObjCInterfaceType>(CanonicalType) || 4670 isa<ObjCObjectType>(CanonicalType); 4671} 4672inline bool Type::isAtomicType() const { 4673 return isa<AtomicType>(CanonicalType); 4674} 4675 4676inline bool Type::isObjCQualifiedIdType() const { 4677 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4678 return OPT->isObjCQualifiedIdType(); 4679 return false; 4680} 4681inline bool Type::isObjCQualifiedClassType() const { 4682 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4683 return OPT->isObjCQualifiedClassType(); 4684 return false; 4685} 4686inline bool Type::isObjCIdType() const { 4687 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4688 return OPT->isObjCIdType(); 4689 return false; 4690} 4691inline bool Type::isObjCClassType() const { 4692 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4693 return OPT->isObjCClassType(); 4694 return false; 4695} 4696inline bool Type::isObjCSelType() const { 4697 if (const PointerType *OPT = getAs<PointerType>()) 4698 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 4699 return false; 4700} 4701inline bool Type::isObjCBuiltinType() const { 4702 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 4703} 4704inline bool Type::isTemplateTypeParmType() const { 4705 return isa<TemplateTypeParmType>(CanonicalType); 4706} 4707 4708inline bool Type::isSpecificBuiltinType(unsigned K) const { 4709 if (const BuiltinType *BT = getAs<BuiltinType>()) 4710 if (BT->getKind() == (BuiltinType::Kind) K) 4711 return true; 4712 return false; 4713} 4714 4715inline bool Type::isPlaceholderType() const { 4716 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4717 return BT->isPlaceholderType(); 4718 return false; 4719} 4720 4721inline const BuiltinType *Type::getAsPlaceholderType() const { 4722 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4723 if (BT->isPlaceholderType()) 4724 return BT; 4725 return 0; 4726} 4727 4728inline bool Type::isSpecificPlaceholderType(unsigned K) const { 4729 assert(BuiltinType::isPlaceholderTypeKind((BuiltinType::Kind) K)); 4730 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4731 return (BT->getKind() == (BuiltinType::Kind) K); 4732 return false; 4733} 4734 4735inline bool Type::isNonOverloadPlaceholderType() const { 4736 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4737 return BT->isNonOverloadPlaceholderType(); 4738 return false; 4739} 4740 4741/// \brief Determines whether this is a type for which one can define 4742/// an overloaded operator. 4743inline bool Type::isOverloadableType() const { 4744 return isDependentType() || isRecordType() || isEnumeralType(); 4745} 4746 4747/// \brief Determines whether this type can decay to a pointer type. 4748inline bool Type::canDecayToPointerType() const { 4749 return isFunctionType() || isArrayType(); 4750} 4751 4752inline bool Type::hasPointerRepresentation() const { 4753 return (isPointerType() || isReferenceType() || isBlockPointerType() || 4754 isObjCObjectPointerType() || isNullPtrType()); 4755} 4756 4757inline bool Type::hasObjCPointerRepresentation() const { 4758 return isObjCObjectPointerType(); 4759} 4760 4761inline const Type *Type::getBaseElementTypeUnsafe() const { 4762 const Type *type = this; 4763 while (const ArrayType *arrayType = type->getAsArrayTypeUnsafe()) 4764 type = arrayType->getElementType().getTypePtr(); 4765 return type; 4766} 4767 4768/// Insertion operator for diagnostics. This allows sending QualType's into a 4769/// diagnostic with <<. 4770inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 4771 QualType T) { 4772 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 4773 DiagnosticsEngine::ak_qualtype); 4774 return DB; 4775} 4776 4777/// Insertion operator for partial diagnostics. This allows sending QualType's 4778/// into a diagnostic with <<. 4779inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, 4780 QualType T) { 4781 PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 4782 DiagnosticsEngine::ak_qualtype); 4783 return PD; 4784} 4785 4786// Helper class template that is used by Type::getAs to ensure that one does 4787// not try to look through a qualified type to get to an array type. 4788template<typename T, 4789 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 4790 llvm::is_base_of<ArrayType, T>::value)> 4791struct ArrayType_cannot_be_used_with_getAs { }; 4792 4793template<typename T> 4794struct ArrayType_cannot_be_used_with_getAs<T, true>; 4795 4796/// Member-template getAs<specific type>'. 4797template <typename T> const T *Type::getAs() const { 4798 ArrayType_cannot_be_used_with_getAs<T> at; 4799 (void)at; 4800 4801 // If this is directly a T type, return it. 4802 if (const T *Ty = dyn_cast<T>(this)) 4803 return Ty; 4804 4805 // If the canonical form of this type isn't the right kind, reject it. 4806 if (!isa<T>(CanonicalType)) 4807 return 0; 4808 4809 // If this is a typedef for the type, strip the typedef off without 4810 // losing all typedef information. 4811 return cast<T>(getUnqualifiedDesugaredType()); 4812} 4813 4814inline const ArrayType *Type::getAsArrayTypeUnsafe() const { 4815 // If this is directly an array type, return it. 4816 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) 4817 return arr; 4818 4819 // If the canonical form of this type isn't the right kind, reject it. 4820 if (!isa<ArrayType>(CanonicalType)) 4821 return 0; 4822 4823 // If this is a typedef for the type, strip the typedef off without 4824 // losing all typedef information. 4825 return cast<ArrayType>(getUnqualifiedDesugaredType()); 4826} 4827 4828template <typename T> const T *Type::castAs() const { 4829 ArrayType_cannot_be_used_with_getAs<T> at; 4830 (void) at; 4831 4832 assert(isa<T>(CanonicalType)); 4833 if (const T *ty = dyn_cast<T>(this)) return ty; 4834 return cast<T>(getUnqualifiedDesugaredType()); 4835} 4836 4837inline const ArrayType *Type::castAsArrayTypeUnsafe() const { 4838 assert(isa<ArrayType>(CanonicalType)); 4839 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) return arr; 4840 return cast<ArrayType>(getUnqualifiedDesugaredType()); 4841} 4842 4843} // end namespace clang 4844 4845#endif 4846