Type.h revision 30c42404202d2e2512e51efc6066bd614cfdb5a4
1//===--- Type.h - C Language Family Type Representation ---------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Type interface and subclasses. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_CLANG_AST_TYPE_H 15#define LLVM_CLANG_AST_TYPE_H 16 17#include "clang/Basic/Diagnostic.h" 18#include "clang/Basic/ExceptionSpecificationType.h" 19#include "clang/Basic/IdentifierTable.h" 20#include "clang/Basic/Linkage.h" 21#include "clang/Basic/PartialDiagnostic.h" 22#include "clang/Basic/Visibility.h" 23#include "clang/AST/NestedNameSpecifier.h" 24#include "clang/AST/TemplateName.h" 25#include "llvm/Support/type_traits.h" 26#include "llvm/Support/ErrorHandling.h" 27#include "llvm/ADT/APSInt.h" 28#include "llvm/ADT/FoldingSet.h" 29#include "llvm/ADT/Optional.h" 30#include "llvm/ADT/PointerIntPair.h" 31#include "llvm/ADT/PointerUnion.h" 32#include "clang/Basic/LLVM.h" 33 34namespace clang { 35 enum { 36 TypeAlignmentInBits = 4, 37 TypeAlignment = 1 << TypeAlignmentInBits 38 }; 39 class Type; 40 class ExtQuals; 41 class QualType; 42} 43 44namespace llvm { 45 template <typename T> 46 class PointerLikeTypeTraits; 47 template<> 48 class PointerLikeTypeTraits< ::clang::Type*> { 49 public: 50 static inline void *getAsVoidPointer(::clang::Type *P) { return P; } 51 static inline ::clang::Type *getFromVoidPointer(void *P) { 52 return static_cast< ::clang::Type*>(P); 53 } 54 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 55 }; 56 template<> 57 class PointerLikeTypeTraits< ::clang::ExtQuals*> { 58 public: 59 static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; } 60 static inline ::clang::ExtQuals *getFromVoidPointer(void *P) { 61 return static_cast< ::clang::ExtQuals*>(P); 62 } 63 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 64 }; 65 66 template <> 67 struct isPodLike<clang::QualType> { static const bool value = true; }; 68} 69 70namespace clang { 71 class ASTContext; 72 class TypedefNameDecl; 73 class TemplateDecl; 74 class TemplateTypeParmDecl; 75 class NonTypeTemplateParmDecl; 76 class TemplateTemplateParmDecl; 77 class TagDecl; 78 class RecordDecl; 79 class CXXRecordDecl; 80 class EnumDecl; 81 class FieldDecl; 82 class ObjCInterfaceDecl; 83 class ObjCProtocolDecl; 84 class ObjCMethodDecl; 85 class UnresolvedUsingTypenameDecl; 86 class Expr; 87 class Stmt; 88 class SourceLocation; 89 class StmtIteratorBase; 90 class TemplateArgument; 91 class TemplateArgumentLoc; 92 class TemplateArgumentListInfo; 93 class ElaboratedType; 94 class ExtQuals; 95 class ExtQualsTypeCommonBase; 96 struct PrintingPolicy; 97 98 template <typename> class CanQual; 99 typedef CanQual<Type> CanQualType; 100 101 // Provide forward declarations for all of the *Type classes 102#define TYPE(Class, Base) class Class##Type; 103#include "clang/AST/TypeNodes.def" 104 105/// Qualifiers - The collection of all-type qualifiers we support. 106/// Clang supports five independent qualifiers: 107/// * C99: const, volatile, and restrict 108/// * Embedded C (TR18037): address spaces 109/// * Objective C: the GC attributes (none, weak, or strong) 110class Qualifiers { 111public: 112 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 113 Const = 0x1, 114 Restrict = 0x2, 115 Volatile = 0x4, 116 CVRMask = Const | Volatile | Restrict 117 }; 118 119 enum GC { 120 GCNone = 0, 121 Weak, 122 Strong 123 }; 124 125 enum ObjCLifetime { 126 /// There is no lifetime qualification on this type. 127 OCL_None, 128 129 /// This object can be modified without requiring retains or 130 /// releases. 131 OCL_ExplicitNone, 132 133 /// Assigning into this object requires the old value to be 134 /// released and the new value to be retained. The timing of the 135 /// release of the old value is inexact: it may be moved to 136 /// immediately after the last known point where the value is 137 /// live. 138 OCL_Strong, 139 140 /// Reading or writing from this object requires a barrier call. 141 OCL_Weak, 142 143 /// Assigning into this object requires a lifetime extension. 144 OCL_Autoreleasing 145 }; 146 147 enum { 148 /// The maximum supported address space number. 149 /// 24 bits should be enough for anyone. 150 MaxAddressSpace = 0xffffffu, 151 152 /// The width of the "fast" qualifier mask. 153 FastWidth = 3, 154 155 /// The fast qualifier mask. 156 FastMask = (1 << FastWidth) - 1 157 }; 158 159 Qualifiers() : Mask(0) {} 160 161 static Qualifiers fromFastMask(unsigned Mask) { 162 Qualifiers Qs; 163 Qs.addFastQualifiers(Mask); 164 return Qs; 165 } 166 167 static Qualifiers fromCVRMask(unsigned CVR) { 168 Qualifiers Qs; 169 Qs.addCVRQualifiers(CVR); 170 return Qs; 171 } 172 173 // Deserialize qualifiers from an opaque representation. 174 static Qualifiers fromOpaqueValue(unsigned opaque) { 175 Qualifiers Qs; 176 Qs.Mask = opaque; 177 return Qs; 178 } 179 180 // Serialize these qualifiers into an opaque representation. 181 unsigned getAsOpaqueValue() const { 182 return Mask; 183 } 184 185 bool hasConst() const { return Mask & Const; } 186 void setConst(bool flag) { 187 Mask = (Mask & ~Const) | (flag ? Const : 0); 188 } 189 void removeConst() { Mask &= ~Const; } 190 void addConst() { Mask |= Const; } 191 192 bool hasVolatile() const { return Mask & Volatile; } 193 void setVolatile(bool flag) { 194 Mask = (Mask & ~Volatile) | (flag ? Volatile : 0); 195 } 196 void removeVolatile() { Mask &= ~Volatile; } 197 void addVolatile() { Mask |= Volatile; } 198 199 bool hasRestrict() const { return Mask & Restrict; } 200 void setRestrict(bool flag) { 201 Mask = (Mask & ~Restrict) | (flag ? Restrict : 0); 202 } 203 void removeRestrict() { Mask &= ~Restrict; } 204 void addRestrict() { Mask |= Restrict; } 205 206 bool hasCVRQualifiers() const { return getCVRQualifiers(); } 207 unsigned getCVRQualifiers() const { return Mask & CVRMask; } 208 void setCVRQualifiers(unsigned mask) { 209 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 210 Mask = (Mask & ~CVRMask) | mask; 211 } 212 void removeCVRQualifiers(unsigned mask) { 213 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 214 Mask &= ~mask; 215 } 216 void removeCVRQualifiers() { 217 removeCVRQualifiers(CVRMask); 218 } 219 void addCVRQualifiers(unsigned mask) { 220 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 221 Mask |= mask; 222 } 223 224 bool hasObjCGCAttr() const { return Mask & GCAttrMask; } 225 GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); } 226 void setObjCGCAttr(GC type) { 227 Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift); 228 } 229 void removeObjCGCAttr() { setObjCGCAttr(GCNone); } 230 void addObjCGCAttr(GC type) { 231 assert(type); 232 setObjCGCAttr(type); 233 } 234 Qualifiers withoutObjCGCAttr() const { 235 Qualifiers qs = *this; 236 qs.removeObjCGCAttr(); 237 return qs; 238 } 239 Qualifiers withoutObjCGLifetime() const { 240 Qualifiers qs = *this; 241 qs.removeObjCLifetime(); 242 return qs; 243 } 244 245 bool hasObjCLifetime() const { return Mask & LifetimeMask; } 246 ObjCLifetime getObjCLifetime() const { 247 return ObjCLifetime((Mask & LifetimeMask) >> LifetimeShift); 248 } 249 void setObjCLifetime(ObjCLifetime type) { 250 Mask = (Mask & ~LifetimeMask) | (type << LifetimeShift); 251 } 252 void removeObjCLifetime() { setObjCLifetime(OCL_None); } 253 void addObjCLifetime(ObjCLifetime type) { 254 assert(type); 255 setObjCLifetime(type); 256 } 257 258 /// True if the lifetime is neither None or ExplicitNone. 259 bool hasNonTrivialObjCLifetime() const { 260 ObjCLifetime lifetime = getObjCLifetime(); 261 return (lifetime > OCL_ExplicitNone); 262 } 263 264 /// True if the lifetime is either strong or weak. 265 bool hasStrongOrWeakObjCLifetime() const { 266 ObjCLifetime lifetime = getObjCLifetime(); 267 return (lifetime == OCL_Strong || lifetime == OCL_Weak); 268 } 269 270 bool hasAddressSpace() const { return Mask & AddressSpaceMask; } 271 unsigned getAddressSpace() const { return Mask >> AddressSpaceShift; } 272 void setAddressSpace(unsigned space) { 273 assert(space <= MaxAddressSpace); 274 Mask = (Mask & ~AddressSpaceMask) 275 | (((uint32_t) space) << AddressSpaceShift); 276 } 277 void removeAddressSpace() { setAddressSpace(0); } 278 void addAddressSpace(unsigned space) { 279 assert(space); 280 setAddressSpace(space); 281 } 282 283 // Fast qualifiers are those that can be allocated directly 284 // on a QualType object. 285 bool hasFastQualifiers() const { return getFastQualifiers(); } 286 unsigned getFastQualifiers() const { return Mask & FastMask; } 287 void setFastQualifiers(unsigned mask) { 288 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 289 Mask = (Mask & ~FastMask) | mask; 290 } 291 void removeFastQualifiers(unsigned mask) { 292 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 293 Mask &= ~mask; 294 } 295 void removeFastQualifiers() { 296 removeFastQualifiers(FastMask); 297 } 298 void addFastQualifiers(unsigned mask) { 299 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 300 Mask |= mask; 301 } 302 303 /// hasNonFastQualifiers - Return true if the set contains any 304 /// qualifiers which require an ExtQuals node to be allocated. 305 bool hasNonFastQualifiers() const { return Mask & ~FastMask; } 306 Qualifiers getNonFastQualifiers() const { 307 Qualifiers Quals = *this; 308 Quals.setFastQualifiers(0); 309 return Quals; 310 } 311 312 /// hasQualifiers - Return true if the set contains any qualifiers. 313 bool hasQualifiers() const { return Mask; } 314 bool empty() const { return !Mask; } 315 316 /// \brief Add the qualifiers from the given set to this set. 317 void addQualifiers(Qualifiers Q) { 318 // If the other set doesn't have any non-boolean qualifiers, just 319 // bit-or it in. 320 if (!(Q.Mask & ~CVRMask)) 321 Mask |= Q.Mask; 322 else { 323 Mask |= (Q.Mask & CVRMask); 324 if (Q.hasAddressSpace()) 325 addAddressSpace(Q.getAddressSpace()); 326 if (Q.hasObjCGCAttr()) 327 addObjCGCAttr(Q.getObjCGCAttr()); 328 if (Q.hasObjCLifetime()) 329 addObjCLifetime(Q.getObjCLifetime()); 330 } 331 } 332 333 /// \brief Add the qualifiers from the given set to this set, given that 334 /// they don't conflict. 335 void addConsistentQualifiers(Qualifiers qs) { 336 assert(getAddressSpace() == qs.getAddressSpace() || 337 !hasAddressSpace() || !qs.hasAddressSpace()); 338 assert(getObjCGCAttr() == qs.getObjCGCAttr() || 339 !hasObjCGCAttr() || !qs.hasObjCGCAttr()); 340 assert(getObjCLifetime() == qs.getObjCLifetime() || 341 !hasObjCLifetime() || !qs.hasObjCLifetime()); 342 Mask |= qs.Mask; 343 } 344 345 /// \brief Determines if these qualifiers compatibly include another set. 346 /// Generally this answers the question of whether an object with the other 347 /// qualifiers can be safely used as an object with these qualifiers. 348 bool compatiblyIncludes(Qualifiers other) const { 349 return 350 // Address spaces must match exactly. 351 getAddressSpace() == other.getAddressSpace() && 352 // ObjC GC qualifiers can match, be added, or be removed, but can't be 353 // changed. 354 (getObjCGCAttr() == other.getObjCGCAttr() || 355 !hasObjCGCAttr() || !other.hasObjCGCAttr()) && 356 // ObjC lifetime qualifiers must match exactly. 357 getObjCLifetime() == other.getObjCLifetime() && 358 // CVR qualifiers may subset. 359 (((Mask & CVRMask) | (other.Mask & CVRMask)) == (Mask & CVRMask)); 360 } 361 362 /// \brief Determines if these qualifiers compatibly include another set of 363 /// qualifiers from the narrow perspective of Objective-C ARC lifetime. 364 /// 365 /// One set of Objective-C lifetime qualifiers compatibly includes the other 366 /// if the lifetime qualifiers match, or if both are non-__weak and the 367 /// including set also contains the 'const' qualifier. 368 bool compatiblyIncludesObjCLifetime(Qualifiers other) const { 369 if (getObjCLifetime() == other.getObjCLifetime()) 370 return true; 371 372 if (getObjCLifetime() == OCL_Weak || other.getObjCLifetime() == OCL_Weak) 373 return false; 374 375 return hasConst(); 376 } 377 378 bool isSupersetOf(Qualifiers Other) const; 379 380 /// \brief Determine whether this set of qualifiers is a strict superset of 381 /// another set of qualifiers, not considering qualifier compatibility. 382 bool isStrictSupersetOf(Qualifiers Other) const; 383 384 bool operator==(Qualifiers Other) const { return Mask == Other.Mask; } 385 bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; } 386 387 operator bool() const { return hasQualifiers(); } 388 389 Qualifiers &operator+=(Qualifiers R) { 390 addQualifiers(R); 391 return *this; 392 } 393 394 // Union two qualifier sets. If an enumerated qualifier appears 395 // in both sets, use the one from the right. 396 friend Qualifiers operator+(Qualifiers L, Qualifiers R) { 397 L += R; 398 return L; 399 } 400 401 Qualifiers &operator-=(Qualifiers R) { 402 Mask = Mask & ~(R.Mask); 403 return *this; 404 } 405 406 /// \brief Compute the difference between two qualifier sets. 407 friend Qualifiers operator-(Qualifiers L, Qualifiers R) { 408 L -= R; 409 return L; 410 } 411 412 std::string getAsString() const; 413 std::string getAsString(const PrintingPolicy &Policy) const { 414 std::string Buffer; 415 getAsStringInternal(Buffer, Policy); 416 return Buffer; 417 } 418 void getAsStringInternal(std::string &S, const PrintingPolicy &Policy) const; 419 420 void Profile(llvm::FoldingSetNodeID &ID) const { 421 ID.AddInteger(Mask); 422 } 423 424private: 425 426 // bits: |0 1 2|3 .. 4|5 .. 7|8 ... 31| 427 // |C R V|GCAttr|Lifetime|AddressSpace| 428 uint32_t Mask; 429 430 static const uint32_t GCAttrMask = 0x18; 431 static const uint32_t GCAttrShift = 3; 432 static const uint32_t LifetimeMask = 0xE0; 433 static const uint32_t LifetimeShift = 5; 434 static const uint32_t AddressSpaceMask = ~(CVRMask|GCAttrMask|LifetimeMask); 435 static const uint32_t AddressSpaceShift = 8; 436}; 437 438/// CallingConv - Specifies the calling convention that a function uses. 439enum CallingConv { 440 CC_Default, 441 CC_C, // __attribute__((cdecl)) 442 CC_X86StdCall, // __attribute__((stdcall)) 443 CC_X86FastCall, // __attribute__((fastcall)) 444 CC_X86ThisCall, // __attribute__((thiscall)) 445 CC_X86Pascal, // __attribute__((pascal)) 446 CC_AAPCS, // __attribute__((pcs("aapcs"))) 447 CC_AAPCS_VFP // __attribute__((pcs("aapcs-vfp"))) 448}; 449 450typedef std::pair<const Type*, Qualifiers> SplitQualType; 451 452/// QualType - For efficiency, we don't store CV-qualified types as nodes on 453/// their own: instead each reference to a type stores the qualifiers. This 454/// greatly reduces the number of nodes we need to allocate for types (for 455/// example we only need one for 'int', 'const int', 'volatile int', 456/// 'const volatile int', etc). 457/// 458/// As an added efficiency bonus, instead of making this a pair, we 459/// just store the two bits we care about in the low bits of the 460/// pointer. To handle the packing/unpacking, we make QualType be a 461/// simple wrapper class that acts like a smart pointer. A third bit 462/// indicates whether there are extended qualifiers present, in which 463/// case the pointer points to a special structure. 464class QualType { 465 // Thankfully, these are efficiently composable. 466 llvm::PointerIntPair<llvm::PointerUnion<const Type*,const ExtQuals*>, 467 Qualifiers::FastWidth> Value; 468 469 const ExtQuals *getExtQualsUnsafe() const { 470 return Value.getPointer().get<const ExtQuals*>(); 471 } 472 473 const Type *getTypePtrUnsafe() const { 474 return Value.getPointer().get<const Type*>(); 475 } 476 477 const ExtQualsTypeCommonBase *getCommonPtr() const { 478 assert(!isNull() && "Cannot retrieve a NULL type pointer"); 479 uintptr_t CommonPtrVal 480 = reinterpret_cast<uintptr_t>(Value.getOpaqueValue()); 481 CommonPtrVal &= ~(uintptr_t)((1 << TypeAlignmentInBits) - 1); 482 return reinterpret_cast<ExtQualsTypeCommonBase*>(CommonPtrVal); 483 } 484 485 friend class QualifierCollector; 486public: 487 QualType() {} 488 489 QualType(const Type *Ptr, unsigned Quals) 490 : Value(Ptr, Quals) {} 491 QualType(const ExtQuals *Ptr, unsigned Quals) 492 : Value(Ptr, Quals) {} 493 494 unsigned getLocalFastQualifiers() const { return Value.getInt(); } 495 void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); } 496 497 /// Retrieves a pointer to the underlying (unqualified) type. 498 /// This should really return a const Type, but it's not worth 499 /// changing all the users right now. 500 /// 501 /// This function requires that the type not be NULL. If the type might be 502 /// NULL, use the (slightly less efficient) \c getTypePtrOrNull(). 503 const Type *getTypePtr() const; 504 505 const Type *getTypePtrOrNull() const; 506 507 /// Retrieves a pointer to the name of the base type. 508 const IdentifierInfo *getBaseTypeIdentifier() const; 509 510 /// Divides a QualType into its unqualified type and a set of local 511 /// qualifiers. 512 SplitQualType split() const; 513 514 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 515 static QualType getFromOpaquePtr(const void *Ptr) { 516 QualType T; 517 T.Value.setFromOpaqueValue(const_cast<void*>(Ptr)); 518 return T; 519 } 520 521 const Type &operator*() const { 522 return *getTypePtr(); 523 } 524 525 const Type *operator->() const { 526 return getTypePtr(); 527 } 528 529 bool isCanonical() const; 530 bool isCanonicalAsParam() const; 531 532 /// isNull - Return true if this QualType doesn't point to a type yet. 533 bool isNull() const { 534 return Value.getPointer().isNull(); 535 } 536 537 /// \brief Determine whether this particular QualType instance has the 538 /// "const" qualifier set, without looking through typedefs that may have 539 /// added "const" at a different level. 540 bool isLocalConstQualified() const { 541 return (getLocalFastQualifiers() & Qualifiers::Const); 542 } 543 544 /// \brief Determine whether this type is const-qualified. 545 bool isConstQualified() const; 546 547 /// \brief Determine whether this particular QualType instance has the 548 /// "restrict" qualifier set, without looking through typedefs that may have 549 /// added "restrict" at a different level. 550 bool isLocalRestrictQualified() const { 551 return (getLocalFastQualifiers() & Qualifiers::Restrict); 552 } 553 554 /// \brief Determine whether this type is restrict-qualified. 555 bool isRestrictQualified() const; 556 557 /// \brief Determine whether this particular QualType instance has the 558 /// "volatile" qualifier set, without looking through typedefs that may have 559 /// added "volatile" at a different level. 560 bool isLocalVolatileQualified() const { 561 return (getLocalFastQualifiers() & Qualifiers::Volatile); 562 } 563 564 /// \brief Determine whether this type is volatile-qualified. 565 bool isVolatileQualified() const; 566 567 /// \brief Determine whether this particular QualType instance has any 568 /// qualifiers, without looking through any typedefs that might add 569 /// qualifiers at a different level. 570 bool hasLocalQualifiers() const { 571 return getLocalFastQualifiers() || hasLocalNonFastQualifiers(); 572 } 573 574 /// \brief Determine whether this type has any qualifiers. 575 bool hasQualifiers() const; 576 577 /// \brief Determine whether this particular QualType instance has any 578 /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType 579 /// instance. 580 bool hasLocalNonFastQualifiers() const { 581 return Value.getPointer().is<const ExtQuals*>(); 582 } 583 584 /// \brief Retrieve the set of qualifiers local to this particular QualType 585 /// instance, not including any qualifiers acquired through typedefs or 586 /// other sugar. 587 Qualifiers getLocalQualifiers() const; 588 589 /// \brief Retrieve the set of qualifiers applied to this type. 590 Qualifiers getQualifiers() const; 591 592 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 593 /// local to this particular QualType instance, not including any qualifiers 594 /// acquired through typedefs or other sugar. 595 unsigned getLocalCVRQualifiers() const { 596 return getLocalFastQualifiers(); 597 } 598 599 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 600 /// applied to this type. 601 unsigned getCVRQualifiers() const; 602 603 bool isConstant(ASTContext& Ctx) const { 604 return QualType::isConstant(*this, Ctx); 605 } 606 607 /// \brief Determine whether this is a Plain Old Data (POD) type (C++ 3.9p10). 608 bool isPODType(ASTContext &Context) const; 609 610 /// isCXX11PODType() - Return true if this is a POD type according to the 611 /// more relaxed rules of the C++11 standard, regardless of the current 612 /// compilation's language. 613 /// (C++0x [basic.types]p9) 614 bool isCXX11PODType(ASTContext &Context) const; 615 616 /// isTrivialType - Return true if this is a trivial type 617 /// (C++0x [basic.types]p9) 618 bool isTrivialType(ASTContext &Context) const; 619 620 /// isTriviallyCopyableType - Return true if this is a trivially 621 /// copyable type (C++0x [basic.types]p9) 622 bool isTriviallyCopyableType(ASTContext &Context) const; 623 624 // Don't promise in the API that anything besides 'const' can be 625 // easily added. 626 627 /// addConst - add the specified type qualifier to this QualType. 628 void addConst() { 629 addFastQualifiers(Qualifiers::Const); 630 } 631 QualType withConst() const { 632 return withFastQualifiers(Qualifiers::Const); 633 } 634 635 /// addVolatile - add the specified type qualifier to this QualType. 636 void addVolatile() { 637 addFastQualifiers(Qualifiers::Volatile); 638 } 639 QualType withVolatile() const { 640 return withFastQualifiers(Qualifiers::Volatile); 641 } 642 643 QualType withCVRQualifiers(unsigned CVR) const { 644 return withFastQualifiers(CVR); 645 } 646 647 void addFastQualifiers(unsigned TQs) { 648 assert(!(TQs & ~Qualifiers::FastMask) 649 && "non-fast qualifier bits set in mask!"); 650 Value.setInt(Value.getInt() | TQs); 651 } 652 653 void removeLocalConst(); 654 void removeLocalVolatile(); 655 void removeLocalRestrict(); 656 void removeLocalCVRQualifiers(unsigned Mask); 657 658 void removeLocalFastQualifiers() { Value.setInt(0); } 659 void removeLocalFastQualifiers(unsigned Mask) { 660 assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers"); 661 Value.setInt(Value.getInt() & ~Mask); 662 } 663 664 // Creates a type with the given qualifiers in addition to any 665 // qualifiers already on this type. 666 QualType withFastQualifiers(unsigned TQs) const { 667 QualType T = *this; 668 T.addFastQualifiers(TQs); 669 return T; 670 } 671 672 // Creates a type with exactly the given fast qualifiers, removing 673 // any existing fast qualifiers. 674 QualType withExactLocalFastQualifiers(unsigned TQs) const { 675 return withoutLocalFastQualifiers().withFastQualifiers(TQs); 676 } 677 678 // Removes fast qualifiers, but leaves any extended qualifiers in place. 679 QualType withoutLocalFastQualifiers() const { 680 QualType T = *this; 681 T.removeLocalFastQualifiers(); 682 return T; 683 } 684 685 QualType getCanonicalType() const; 686 687 /// \brief Return this type with all of the instance-specific qualifiers 688 /// removed, but without removing any qualifiers that may have been applied 689 /// through typedefs. 690 QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); } 691 692 /// \brief Retrieve the unqualified variant of the given type, 693 /// removing as little sugar as possible. 694 /// 695 /// This routine looks through various kinds of sugar to find the 696 /// least-desugared type that is unqualified. For example, given: 697 /// 698 /// \code 699 /// typedef int Integer; 700 /// typedef const Integer CInteger; 701 /// typedef CInteger DifferenceType; 702 /// \endcode 703 /// 704 /// Executing \c getUnqualifiedType() on the type \c DifferenceType will 705 /// desugar until we hit the type \c Integer, which has no qualifiers on it. 706 /// 707 /// The resulting type might still be qualified if it's an array 708 /// type. To strip qualifiers even from within an array type, use 709 /// ASTContext::getUnqualifiedArrayType. 710 inline QualType getUnqualifiedType() const; 711 712 /// getSplitUnqualifiedType - Retrieve the unqualified variant of the 713 /// given type, removing as little sugar as possible. 714 /// 715 /// Like getUnqualifiedType(), but also returns the set of 716 /// qualifiers that were built up. 717 /// 718 /// The resulting type might still be qualified if it's an array 719 /// type. To strip qualifiers even from within an array type, use 720 /// ASTContext::getUnqualifiedArrayType. 721 inline SplitQualType getSplitUnqualifiedType() const; 722 723 /// \brief Determine whether this type is more qualified than the other 724 /// given type, requiring exact equality for non-CVR qualifiers. 725 bool isMoreQualifiedThan(QualType Other) const; 726 727 /// \brief Determine whether this type is at least as qualified as the other 728 /// given type, requiring exact equality for non-CVR qualifiers. 729 bool isAtLeastAsQualifiedAs(QualType Other) const; 730 731 QualType getNonReferenceType() const; 732 733 /// \brief Determine the type of a (typically non-lvalue) expression with the 734 /// specified result type. 735 /// 736 /// This routine should be used for expressions for which the return type is 737 /// explicitly specified (e.g., in a cast or call) and isn't necessarily 738 /// an lvalue. It removes a top-level reference (since there are no 739 /// expressions of reference type) and deletes top-level cvr-qualifiers 740 /// from non-class types (in C++) or all types (in C). 741 QualType getNonLValueExprType(ASTContext &Context) const; 742 743 /// getDesugaredType - Return the specified type with any "sugar" removed from 744 /// the type. This takes off typedefs, typeof's etc. If the outer level of 745 /// the type is already concrete, it returns it unmodified. This is similar 746 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 747 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 748 /// concrete. 749 /// 750 /// Qualifiers are left in place. 751 QualType getDesugaredType(const ASTContext &Context) const { 752 return getDesugaredType(*this, Context); 753 } 754 755 SplitQualType getSplitDesugaredType() const { 756 return getSplitDesugaredType(*this); 757 } 758 759 /// \brief Return the specified type with one level of "sugar" removed from 760 /// the type. 761 /// 762 /// This routine takes off the first typedef, typeof, etc. If the outer level 763 /// of the type is already concrete, it returns it unmodified. 764 QualType getSingleStepDesugaredType(const ASTContext &Context) const; 765 766 /// IgnoreParens - Returns the specified type after dropping any 767 /// outer-level parentheses. 768 QualType IgnoreParens() const { 769 if (isa<ParenType>(*this)) 770 return QualType::IgnoreParens(*this); 771 return *this; 772 } 773 774 /// operator==/!= - Indicate whether the specified types and qualifiers are 775 /// identical. 776 friend bool operator==(const QualType &LHS, const QualType &RHS) { 777 return LHS.Value == RHS.Value; 778 } 779 friend bool operator!=(const QualType &LHS, const QualType &RHS) { 780 return LHS.Value != RHS.Value; 781 } 782 std::string getAsString() const { 783 return getAsString(split()); 784 } 785 static std::string getAsString(SplitQualType split) { 786 return getAsString(split.first, split.second); 787 } 788 static std::string getAsString(const Type *ty, Qualifiers qs); 789 790 std::string getAsString(const PrintingPolicy &Policy) const { 791 std::string S; 792 getAsStringInternal(S, Policy); 793 return S; 794 } 795 void getAsStringInternal(std::string &Str, 796 const PrintingPolicy &Policy) const { 797 return getAsStringInternal(split(), Str, Policy); 798 } 799 static void getAsStringInternal(SplitQualType split, std::string &out, 800 const PrintingPolicy &policy) { 801 return getAsStringInternal(split.first, split.second, out, policy); 802 } 803 static void getAsStringInternal(const Type *ty, Qualifiers qs, 804 std::string &out, 805 const PrintingPolicy &policy); 806 807 void dump(const char *s) const; 808 void dump() const; 809 810 void Profile(llvm::FoldingSetNodeID &ID) const { 811 ID.AddPointer(getAsOpaquePtr()); 812 } 813 814 /// getAddressSpace - Return the address space of this type. 815 inline unsigned getAddressSpace() const; 816 817 /// getObjCGCAttr - Returns gc attribute of this type. 818 inline Qualifiers::GC getObjCGCAttr() const; 819 820 /// isObjCGCWeak true when Type is objc's weak. 821 bool isObjCGCWeak() const { 822 return getObjCGCAttr() == Qualifiers::Weak; 823 } 824 825 /// isObjCGCStrong true when Type is objc's strong. 826 bool isObjCGCStrong() const { 827 return getObjCGCAttr() == Qualifiers::Strong; 828 } 829 830 /// getObjCLifetime - Returns lifetime attribute of this type. 831 Qualifiers::ObjCLifetime getObjCLifetime() const { 832 return getQualifiers().getObjCLifetime(); 833 } 834 835 bool hasNonTrivialObjCLifetime() const { 836 return getQualifiers().hasNonTrivialObjCLifetime(); 837 } 838 839 bool hasStrongOrWeakObjCLifetime() const { 840 return getQualifiers().hasStrongOrWeakObjCLifetime(); 841 } 842 843 enum DestructionKind { 844 DK_none, 845 DK_cxx_destructor, 846 DK_objc_strong_lifetime, 847 DK_objc_weak_lifetime 848 }; 849 850 /// isDestructedType - nonzero if objects of this type require 851 /// non-trivial work to clean up after. Non-zero because it's 852 /// conceivable that qualifiers (objc_gc(weak)?) could make 853 /// something require destruction. 854 DestructionKind isDestructedType() const { 855 return isDestructedTypeImpl(*this); 856 } 857 858 /// \brief Determine whether expressions of the given type are forbidden 859 /// from being lvalues in C. 860 /// 861 /// The expression types that are forbidden to be lvalues are: 862 /// - 'void', but not qualified void 863 /// - function types 864 /// 865 /// The exact rule here is C99 6.3.2.1: 866 /// An lvalue is an expression with an object type or an incomplete 867 /// type other than void. 868 bool isCForbiddenLValueType() const; 869 870 /// \brief Determine whether this type has trivial copy/move-assignment 871 /// semantics. 872 bool hasTrivialAssignment(ASTContext &Context, bool Copying) const; 873 874private: 875 // These methods are implemented in a separate translation unit; 876 // "static"-ize them to avoid creating temporary QualTypes in the 877 // caller. 878 static bool isConstant(QualType T, ASTContext& Ctx); 879 static QualType getDesugaredType(QualType T, const ASTContext &Context); 880 static SplitQualType getSplitDesugaredType(QualType T); 881 static SplitQualType getSplitUnqualifiedTypeImpl(QualType type); 882 static QualType IgnoreParens(QualType T); 883 static DestructionKind isDestructedTypeImpl(QualType type); 884}; 885 886} // end clang. 887 888namespace llvm { 889/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 890/// to a specific Type class. 891template<> struct simplify_type<const ::clang::QualType> { 892 typedef const ::clang::Type *SimpleType; 893 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 894 return Val.getTypePtr(); 895 } 896}; 897template<> struct simplify_type< ::clang::QualType> 898 : public simplify_type<const ::clang::QualType> {}; 899 900// Teach SmallPtrSet that QualType is "basically a pointer". 901template<> 902class PointerLikeTypeTraits<clang::QualType> { 903public: 904 static inline void *getAsVoidPointer(clang::QualType P) { 905 return P.getAsOpaquePtr(); 906 } 907 static inline clang::QualType getFromVoidPointer(void *P) { 908 return clang::QualType::getFromOpaquePtr(P); 909 } 910 // Various qualifiers go in low bits. 911 enum { NumLowBitsAvailable = 0 }; 912}; 913 914} // end namespace llvm 915 916namespace clang { 917 918/// \brief Base class that is common to both the \c ExtQuals and \c Type 919/// classes, which allows \c QualType to access the common fields between the 920/// two. 921/// 922class ExtQualsTypeCommonBase { 923 ExtQualsTypeCommonBase(const Type *baseType, QualType canon) 924 : BaseType(baseType), CanonicalType(canon) {} 925 926 /// \brief The "base" type of an extended qualifiers type (\c ExtQuals) or 927 /// a self-referential pointer (for \c Type). 928 /// 929 /// This pointer allows an efficient mapping from a QualType to its 930 /// underlying type pointer. 931 const Type *const BaseType; 932 933 /// \brief The canonical type of this type. A QualType. 934 QualType CanonicalType; 935 936 friend class QualType; 937 friend class Type; 938 friend class ExtQuals; 939}; 940 941/// ExtQuals - We can encode up to four bits in the low bits of a 942/// type pointer, but there are many more type qualifiers that we want 943/// to be able to apply to an arbitrary type. Therefore we have this 944/// struct, intended to be heap-allocated and used by QualType to 945/// store qualifiers. 946/// 947/// The current design tags the 'const', 'restrict', and 'volatile' qualifiers 948/// in three low bits on the QualType pointer; a fourth bit records whether 949/// the pointer is an ExtQuals node. The extended qualifiers (address spaces, 950/// Objective-C GC attributes) are much more rare. 951class ExtQuals : public ExtQualsTypeCommonBase, public llvm::FoldingSetNode { 952 // NOTE: changing the fast qualifiers should be straightforward as 953 // long as you don't make 'const' non-fast. 954 // 1. Qualifiers: 955 // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). 956 // Fast qualifiers must occupy the low-order bits. 957 // b) Update Qualifiers::FastWidth and FastMask. 958 // 2. QualType: 959 // a) Update is{Volatile,Restrict}Qualified(), defined inline. 960 // b) Update remove{Volatile,Restrict}, defined near the end of 961 // this header. 962 // 3. ASTContext: 963 // a) Update get{Volatile,Restrict}Type. 964 965 /// Quals - the immutable set of qualifiers applied by this 966 /// node; always contains extended qualifiers. 967 Qualifiers Quals; 968 969 ExtQuals *this_() { return this; } 970 971public: 972 ExtQuals(const Type *baseType, QualType canon, Qualifiers quals) 973 : ExtQualsTypeCommonBase(baseType, 974 canon.isNull() ? QualType(this_(), 0) : canon), 975 Quals(quals) 976 { 977 assert(Quals.hasNonFastQualifiers() 978 && "ExtQuals created with no fast qualifiers"); 979 assert(!Quals.hasFastQualifiers() 980 && "ExtQuals created with fast qualifiers"); 981 } 982 983 Qualifiers getQualifiers() const { return Quals; } 984 985 bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } 986 Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } 987 988 bool hasObjCLifetime() const { return Quals.hasObjCLifetime(); } 989 Qualifiers::ObjCLifetime getObjCLifetime() const { 990 return Quals.getObjCLifetime(); 991 } 992 993 bool hasAddressSpace() const { return Quals.hasAddressSpace(); } 994 unsigned getAddressSpace() const { return Quals.getAddressSpace(); } 995 996 const Type *getBaseType() const { return BaseType; } 997 998public: 999 void Profile(llvm::FoldingSetNodeID &ID) const { 1000 Profile(ID, getBaseType(), Quals); 1001 } 1002 static void Profile(llvm::FoldingSetNodeID &ID, 1003 const Type *BaseType, 1004 Qualifiers Quals) { 1005 assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!"); 1006 ID.AddPointer(BaseType); 1007 Quals.Profile(ID); 1008 } 1009}; 1010 1011/// \brief The kind of C++0x ref-qualifier associated with a function type, 1012/// which determines whether a member function's "this" object can be an 1013/// lvalue, rvalue, or neither. 1014enum RefQualifierKind { 1015 /// \brief No ref-qualifier was provided. 1016 RQ_None = 0, 1017 /// \brief An lvalue ref-qualifier was provided (\c &). 1018 RQ_LValue, 1019 /// \brief An rvalue ref-qualifier was provided (\c &&). 1020 RQ_RValue 1021}; 1022 1023/// Type - This is the base class of the type hierarchy. A central concept 1024/// with types is that each type always has a canonical type. A canonical type 1025/// is the type with any typedef names stripped out of it or the types it 1026/// references. For example, consider: 1027/// 1028/// typedef int foo; 1029/// typedef foo* bar; 1030/// 'int *' 'foo *' 'bar' 1031/// 1032/// There will be a Type object created for 'int'. Since int is canonical, its 1033/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 1034/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 1035/// there is a PointerType that represents 'int*', which, like 'int', is 1036/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 1037/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 1038/// is also 'int*'. 1039/// 1040/// Non-canonical types are useful for emitting diagnostics, without losing 1041/// information about typedefs being used. Canonical types are useful for type 1042/// comparisons (they allow by-pointer equality tests) and useful for reasoning 1043/// about whether something has a particular form (e.g. is a function type), 1044/// because they implicitly, recursively, strip all typedefs out of a type. 1045/// 1046/// Types, once created, are immutable. 1047/// 1048class Type : public ExtQualsTypeCommonBase { 1049public: 1050 enum TypeClass { 1051#define TYPE(Class, Base) Class, 1052#define LAST_TYPE(Class) TypeLast = Class, 1053#define ABSTRACT_TYPE(Class, Base) 1054#include "clang/AST/TypeNodes.def" 1055 TagFirst = Record, TagLast = Enum 1056 }; 1057 1058private: 1059 Type(const Type&); // DO NOT IMPLEMENT. 1060 void operator=(const Type&); // DO NOT IMPLEMENT. 1061 1062 /// Bitfields required by the Type class. 1063 class TypeBitfields { 1064 friend class Type; 1065 template <class T> friend class TypePropertyCache; 1066 1067 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 1068 unsigned TC : 8; 1069 1070 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 1071 /// Note that this should stay at the end of the ivars for Type so that 1072 /// subclasses can pack their bitfields into the same word. 1073 unsigned Dependent : 1; 1074 1075 /// \brief Whether this type somehow involves a template parameter, even 1076 /// if the resolution of the type does not depend on a template parameter. 1077 unsigned InstantiationDependent : 1; 1078 1079 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 1080 unsigned VariablyModified : 1; 1081 1082 /// \brief Whether this type contains an unexpanded parameter pack 1083 /// (for C++0x variadic templates). 1084 unsigned ContainsUnexpandedParameterPack : 1; 1085 1086 /// \brief Nonzero if the cache (i.e. the bitfields here starting 1087 /// with 'Cache') is valid. If so, then this is a 1088 /// LangOptions::VisibilityMode+1. 1089 mutable unsigned CacheValidAndVisibility : 2; 1090 1091 /// \brief Linkage of this type. 1092 mutable unsigned CachedLinkage : 2; 1093 1094 /// \brief Whether this type involves and local or unnamed types. 1095 mutable unsigned CachedLocalOrUnnamed : 1; 1096 1097 /// \brief FromAST - Whether this type comes from an AST file. 1098 mutable unsigned FromAST : 1; 1099 1100 bool isCacheValid() const { 1101 return (CacheValidAndVisibility != 0); 1102 } 1103 Visibility getVisibility() const { 1104 assert(isCacheValid() && "getting linkage from invalid cache"); 1105 return static_cast<Visibility>(CacheValidAndVisibility-1); 1106 } 1107 Linkage getLinkage() const { 1108 assert(isCacheValid() && "getting linkage from invalid cache"); 1109 return static_cast<Linkage>(CachedLinkage); 1110 } 1111 bool hasLocalOrUnnamedType() const { 1112 assert(isCacheValid() && "getting linkage from invalid cache"); 1113 return CachedLocalOrUnnamed; 1114 } 1115 }; 1116 enum { NumTypeBits = 18 }; 1117 1118protected: 1119 // These classes allow subclasses to somewhat cleanly pack bitfields 1120 // into Type. 1121 1122 class ArrayTypeBitfields { 1123 friend class ArrayType; 1124 1125 unsigned : NumTypeBits; 1126 1127 /// IndexTypeQuals - CVR qualifiers from declarations like 1128 /// 'int X[static restrict 4]'. For function parameters only. 1129 unsigned IndexTypeQuals : 3; 1130 1131 /// SizeModifier - storage class qualifiers from declarations like 1132 /// 'int X[static restrict 4]'. For function parameters only. 1133 /// Actually an ArrayType::ArraySizeModifier. 1134 unsigned SizeModifier : 3; 1135 }; 1136 1137 class BuiltinTypeBitfields { 1138 friend class BuiltinType; 1139 1140 unsigned : NumTypeBits; 1141 1142 /// The kind (BuiltinType::Kind) of builtin type this is. 1143 unsigned Kind : 8; 1144 }; 1145 1146 class FunctionTypeBitfields { 1147 friend class FunctionType; 1148 1149 unsigned : NumTypeBits; 1150 1151 /// Extra information which affects how the function is called, like 1152 /// regparm and the calling convention. 1153 unsigned ExtInfo : 8; 1154 1155 /// Whether the function is variadic. Only used by FunctionProtoType. 1156 unsigned Variadic : 1; 1157 1158 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1159 /// other bitfields. 1160 /// The qualifiers are part of FunctionProtoType because... 1161 /// 1162 /// C++ 8.3.5p4: The return type, the parameter type list and the 1163 /// cv-qualifier-seq, [...], are part of the function type. 1164 unsigned TypeQuals : 3; 1165 1166 /// \brief The ref-qualifier associated with a \c FunctionProtoType. 1167 /// 1168 /// This is a value of type \c RefQualifierKind. 1169 unsigned RefQualifier : 2; 1170 }; 1171 1172 class ObjCObjectTypeBitfields { 1173 friend class ObjCObjectType; 1174 1175 unsigned : NumTypeBits; 1176 1177 /// NumProtocols - The number of protocols stored directly on this 1178 /// object type. 1179 unsigned NumProtocols : 32 - NumTypeBits; 1180 }; 1181 1182 class ReferenceTypeBitfields { 1183 friend class ReferenceType; 1184 1185 unsigned : NumTypeBits; 1186 1187 /// True if the type was originally spelled with an lvalue sigil. 1188 /// This is never true of rvalue references but can also be false 1189 /// on lvalue references because of C++0x [dcl.typedef]p9, 1190 /// as follows: 1191 /// 1192 /// typedef int &ref; // lvalue, spelled lvalue 1193 /// typedef int &&rvref; // rvalue 1194 /// ref &a; // lvalue, inner ref, spelled lvalue 1195 /// ref &&a; // lvalue, inner ref 1196 /// rvref &a; // lvalue, inner ref, spelled lvalue 1197 /// rvref &&a; // rvalue, inner ref 1198 unsigned SpelledAsLValue : 1; 1199 1200 /// True if the inner type is a reference type. This only happens 1201 /// in non-canonical forms. 1202 unsigned InnerRef : 1; 1203 }; 1204 1205 class TypeWithKeywordBitfields { 1206 friend class TypeWithKeyword; 1207 1208 unsigned : NumTypeBits; 1209 1210 /// An ElaboratedTypeKeyword. 8 bits for efficient access. 1211 unsigned Keyword : 8; 1212 }; 1213 1214 class VectorTypeBitfields { 1215 friend class VectorType; 1216 1217 unsigned : NumTypeBits; 1218 1219 /// VecKind - The kind of vector, either a generic vector type or some 1220 /// target-specific vector type such as for AltiVec or Neon. 1221 unsigned VecKind : 3; 1222 1223 /// NumElements - The number of elements in the vector. 1224 unsigned NumElements : 29 - NumTypeBits; 1225 }; 1226 1227 class AttributedTypeBitfields { 1228 friend class AttributedType; 1229 1230 unsigned : NumTypeBits; 1231 1232 /// AttrKind - an AttributedType::Kind 1233 unsigned AttrKind : 32 - NumTypeBits; 1234 }; 1235 1236 union { 1237 TypeBitfields TypeBits; 1238 ArrayTypeBitfields ArrayTypeBits; 1239 AttributedTypeBitfields AttributedTypeBits; 1240 BuiltinTypeBitfields BuiltinTypeBits; 1241 FunctionTypeBitfields FunctionTypeBits; 1242 ObjCObjectTypeBitfields ObjCObjectTypeBits; 1243 ReferenceTypeBitfields ReferenceTypeBits; 1244 TypeWithKeywordBitfields TypeWithKeywordBits; 1245 VectorTypeBitfields VectorTypeBits; 1246 }; 1247 1248private: 1249 /// \brief Set whether this type comes from an AST file. 1250 void setFromAST(bool V = true) const { 1251 TypeBits.FromAST = V; 1252 } 1253 1254 template <class T> friend class TypePropertyCache; 1255 1256protected: 1257 // silence VC++ warning C4355: 'this' : used in base member initializer list 1258 Type *this_() { return this; } 1259 Type(TypeClass tc, QualType canon, bool Dependent, 1260 bool InstantiationDependent, bool VariablyModified, 1261 bool ContainsUnexpandedParameterPack) 1262 : ExtQualsTypeCommonBase(this, 1263 canon.isNull() ? QualType(this_(), 0) : canon) { 1264 TypeBits.TC = tc; 1265 TypeBits.Dependent = Dependent; 1266 TypeBits.InstantiationDependent = Dependent || InstantiationDependent; 1267 TypeBits.VariablyModified = VariablyModified; 1268 TypeBits.ContainsUnexpandedParameterPack = ContainsUnexpandedParameterPack; 1269 TypeBits.CacheValidAndVisibility = 0; 1270 TypeBits.CachedLocalOrUnnamed = false; 1271 TypeBits.CachedLinkage = NoLinkage; 1272 TypeBits.FromAST = false; 1273 } 1274 friend class ASTContext; 1275 1276 void setDependent(bool D = true) { 1277 TypeBits.Dependent = D; 1278 if (D) 1279 TypeBits.InstantiationDependent = true; 1280 } 1281 void setInstantiationDependent(bool D = true) { 1282 TypeBits.InstantiationDependent = D; } 1283 void setVariablyModified(bool VM = true) { TypeBits.VariablyModified = VM; 1284 } 1285 void setContainsUnexpandedParameterPack(bool PP = true) { 1286 TypeBits.ContainsUnexpandedParameterPack = PP; 1287 } 1288 1289public: 1290 TypeClass getTypeClass() const { return static_cast<TypeClass>(TypeBits.TC); } 1291 1292 /// \brief Whether this type comes from an AST file. 1293 bool isFromAST() const { return TypeBits.FromAST; } 1294 1295 /// \brief Whether this type is or contains an unexpanded parameter 1296 /// pack, used to support C++0x variadic templates. 1297 /// 1298 /// A type that contains a parameter pack shall be expanded by the 1299 /// ellipsis operator at some point. For example, the typedef in the 1300 /// following example contains an unexpanded parameter pack 'T': 1301 /// 1302 /// \code 1303 /// template<typename ...T> 1304 /// struct X { 1305 /// typedef T* pointer_types; // ill-formed; T is a parameter pack. 1306 /// }; 1307 /// \endcode 1308 /// 1309 /// Note that this routine does not specify which 1310 bool containsUnexpandedParameterPack() const { 1311 return TypeBits.ContainsUnexpandedParameterPack; 1312 } 1313 1314 /// Determines if this type would be canonical if it had no further 1315 /// qualification. 1316 bool isCanonicalUnqualified() const { 1317 return CanonicalType == QualType(this, 0); 1318 } 1319 1320 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 1321 /// object types, function types, and incomplete types. 1322 1323 /// isIncompleteType - Return true if this is an incomplete type. 1324 /// A type that can describe objects, but which lacks information needed to 1325 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 1326 /// routine will need to determine if the size is actually required. 1327 bool isIncompleteType() const; 1328 1329 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 1330 /// type, in other words, not a function type. 1331 bool isIncompleteOrObjectType() const { 1332 return !isFunctionType(); 1333 } 1334 1335 /// \brief Determine whether this type is an object type. 1336 bool isObjectType() const { 1337 // C++ [basic.types]p8: 1338 // An object type is a (possibly cv-qualified) type that is not a 1339 // function type, not a reference type, and not a void type. 1340 return !isReferenceType() && !isFunctionType() && !isVoidType(); 1341 } 1342 1343 /// isLiteralType - Return true if this is a literal type 1344 /// (C++0x [basic.types]p10) 1345 bool isLiteralType() const; 1346 1347 /// \brief Test if this type is a standard-layout type. 1348 /// (C++0x [basic.type]p9) 1349 bool isStandardLayoutType() const; 1350 1351 /// Helper methods to distinguish type categories. All type predicates 1352 /// operate on the canonical type, ignoring typedefs and qualifiers. 1353 1354 /// isBuiltinType - returns true if the type is a builtin type. 1355 bool isBuiltinType() const; 1356 1357 /// isSpecificBuiltinType - Test for a particular builtin type. 1358 bool isSpecificBuiltinType(unsigned K) const; 1359 1360 /// isPlaceholderType - Test for a type which does not represent an 1361 /// actual type-system type but is instead used as a placeholder for 1362 /// various convenient purposes within Clang. All such types are 1363 /// BuiltinTypes. 1364 bool isPlaceholderType() const; 1365 1366 /// isSpecificPlaceholderType - Test for a specific placeholder type. 1367 bool isSpecificPlaceholderType(unsigned K) const; 1368 1369 /// isIntegerType() does *not* include complex integers (a GCC extension). 1370 /// isComplexIntegerType() can be used to test for complex integers. 1371 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 1372 bool isEnumeralType() const; 1373 bool isBooleanType() const; 1374 bool isCharType() const; 1375 bool isWideCharType() const; 1376 bool isChar16Type() const; 1377 bool isChar32Type() const; 1378 bool isAnyCharacterType() const; 1379 bool isIntegralType(ASTContext &Ctx) const; 1380 1381 /// \brief Determine whether this type is an integral or enumeration type. 1382 bool isIntegralOrEnumerationType() const; 1383 /// \brief Determine whether this type is an integral or unscoped enumeration 1384 /// type. 1385 bool isIntegralOrUnscopedEnumerationType() const; 1386 1387 /// Floating point categories. 1388 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 1389 /// isComplexType() does *not* include complex integers (a GCC extension). 1390 /// isComplexIntegerType() can be used to test for complex integers. 1391 bool isComplexType() const; // C99 6.2.5p11 (complex) 1392 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 1393 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 1394 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 1395 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 1396 bool isVoidType() const; // C99 6.2.5p19 1397 bool isDerivedType() const; // C99 6.2.5p20 1398 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 1399 bool isAggregateType() const; 1400 bool isFundamentalType() const; 1401 bool isCompoundType() const; 1402 1403 // Type Predicates: Check to see if this type is structurally the specified 1404 // type, ignoring typedefs and qualifiers. 1405 bool isFunctionType() const; 1406 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 1407 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 1408 bool isPointerType() const; 1409 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 1410 bool isBlockPointerType() const; 1411 bool isVoidPointerType() const; 1412 bool isReferenceType() const; 1413 bool isLValueReferenceType() const; 1414 bool isRValueReferenceType() const; 1415 bool isFunctionPointerType() const; 1416 bool isMemberPointerType() const; 1417 bool isMemberFunctionPointerType() const; 1418 bool isMemberDataPointerType() const; 1419 bool isArrayType() const; 1420 bool isConstantArrayType() const; 1421 bool isIncompleteArrayType() const; 1422 bool isVariableArrayType() const; 1423 bool isDependentSizedArrayType() const; 1424 bool isRecordType() const; 1425 bool isClassType() const; 1426 bool isStructureType() const; 1427 bool isStructureOrClassType() const; 1428 bool isUnionType() const; 1429 bool isComplexIntegerType() const; // GCC _Complex integer type. 1430 bool isVectorType() const; // GCC vector type. 1431 bool isExtVectorType() const; // Extended vector type. 1432 bool isObjCObjectPointerType() const; // pointer to ObjC object 1433 bool isObjCRetainableType() const; // ObjC object or block pointer 1434 bool isObjCLifetimeType() const; // (array of)* retainable type 1435 bool isObjCIndirectLifetimeType() const; // (pointer to)* lifetime type 1436 bool isObjCNSObjectType() const; // __attribute__((NSObject)) 1437 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 1438 // for the common case. 1439 bool isObjCObjectType() const; // NSString or typeof(*(id)0) 1440 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 1441 bool isObjCQualifiedIdType() const; // id<foo> 1442 bool isObjCQualifiedClassType() const; // Class<foo> 1443 bool isObjCObjectOrInterfaceType() const; 1444 bool isObjCIdType() const; // id 1445 bool isObjCClassType() const; // Class 1446 bool isObjCSelType() const; // Class 1447 bool isObjCBuiltinType() const; // 'id' or 'Class' 1448 bool isObjCARCBridgableType() const; 1449 bool isCARCBridgableType() const; 1450 bool isTemplateTypeParmType() const; // C++ template type parameter 1451 bool isNullPtrType() const; // C++0x nullptr_t 1452 1453 /// Determines if this type, which must satisfy 1454 /// isObjCLifetimeType(), is implicitly __unsafe_unretained rather 1455 /// than implicitly __strong. 1456 bool isObjCARCImplicitlyUnretainedType() const; 1457 1458 /// Return the implicit lifetime for this type, which must not be dependent. 1459 Qualifiers::ObjCLifetime getObjCARCImplicitLifetime() const; 1460 1461 enum ScalarTypeKind { 1462 STK_CPointer, 1463 STK_BlockPointer, 1464 STK_ObjCObjectPointer, 1465 STK_MemberPointer, 1466 STK_Bool, 1467 STK_Integral, 1468 STK_Floating, 1469 STK_IntegralComplex, 1470 STK_FloatingComplex 1471 }; 1472 /// getScalarTypeKind - Given that this is a scalar type, classify it. 1473 ScalarTypeKind getScalarTypeKind() const; 1474 1475 /// isDependentType - Whether this type is a dependent type, meaning 1476 /// that its definition somehow depends on a template parameter 1477 /// (C++ [temp.dep.type]). 1478 bool isDependentType() const { return TypeBits.Dependent; } 1479 1480 /// \brief Determine whether this type is an instantiation-dependent type, 1481 /// meaning that the type involves a template parameter (even if the 1482 /// definition does not actually depend on the type substituted for that 1483 /// template parameter). 1484 bool isInstantiationDependentType() const { 1485 return TypeBits.InstantiationDependent; 1486 } 1487 1488 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 1489 bool isVariablyModifiedType() const { return TypeBits.VariablyModified; } 1490 1491 /// \brief Whether this type involves a variable-length array type 1492 /// with a definite size. 1493 bool hasSizedVLAType() const; 1494 1495 /// \brief Whether this type is or contains a local or unnamed type. 1496 bool hasUnnamedOrLocalType() const; 1497 1498 bool isOverloadableType() const; 1499 1500 /// \brief Determine wither this type is a C++ elaborated-type-specifier. 1501 bool isElaboratedTypeSpecifier() const; 1502 1503 bool canDecayToPointerType() const; 1504 1505 /// hasPointerRepresentation - Whether this type is represented 1506 /// natively as a pointer; this includes pointers, references, block 1507 /// pointers, and Objective-C interface, qualified id, and qualified 1508 /// interface types, as well as nullptr_t. 1509 bool hasPointerRepresentation() const; 1510 1511 /// hasObjCPointerRepresentation - Whether this type can represent 1512 /// an objective pointer type for the purpose of GC'ability 1513 bool hasObjCPointerRepresentation() const; 1514 1515 /// \brief Determine whether this type has an integer representation 1516 /// of some sort, e.g., it is an integer type or a vector. 1517 bool hasIntegerRepresentation() const; 1518 1519 /// \brief Determine whether this type has an signed integer representation 1520 /// of some sort, e.g., it is an signed integer type or a vector. 1521 bool hasSignedIntegerRepresentation() const; 1522 1523 /// \brief Determine whether this type has an unsigned integer representation 1524 /// of some sort, e.g., it is an unsigned integer type or a vector. 1525 bool hasUnsignedIntegerRepresentation() const; 1526 1527 /// \brief Determine whether this type has a floating-point representation 1528 /// of some sort, e.g., it is a floating-point type or a vector thereof. 1529 bool hasFloatingRepresentation() const; 1530 1531 // Type Checking Functions: Check to see if this type is structurally the 1532 // specified type, ignoring typedefs and qualifiers, and return a pointer to 1533 // the best type we can. 1534 const RecordType *getAsStructureType() const; 1535 /// NOTE: getAs*ArrayType are methods on ASTContext. 1536 const RecordType *getAsUnionType() const; 1537 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 1538 // The following is a convenience method that returns an ObjCObjectPointerType 1539 // for object declared using an interface. 1540 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 1541 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 1542 const ObjCObjectPointerType *getAsObjCQualifiedClassType() const; 1543 const ObjCObjectType *getAsObjCQualifiedInterfaceType() const; 1544 const CXXRecordDecl *getCXXRecordDeclForPointerType() const; 1545 1546 /// \brief Retrieves the CXXRecordDecl that this type refers to, either 1547 /// because the type is a RecordType or because it is the injected-class-name 1548 /// type of a class template or class template partial specialization. 1549 CXXRecordDecl *getAsCXXRecordDecl() const; 1550 1551 /// \brief Get the AutoType whose type will be deduced for a variable with 1552 /// an initializer of this type. This looks through declarators like pointer 1553 /// types, but not through decltype or typedefs. 1554 AutoType *getContainedAutoType() const; 1555 1556 /// Member-template getAs<specific type>'. Look through sugar for 1557 /// an instance of <specific type>. This scheme will eventually 1558 /// replace the specific getAsXXXX methods above. 1559 /// 1560 /// There are some specializations of this member template listed 1561 /// immediately following this class. 1562 template <typename T> const T *getAs() const; 1563 1564 /// A variant of getAs<> for array types which silently discards 1565 /// qualifiers from the outermost type. 1566 const ArrayType *getAsArrayTypeUnsafe() const; 1567 1568 /// Member-template castAs<specific type>. Look through sugar for 1569 /// the underlying instance of <specific type>. 1570 /// 1571 /// This method has the same relationship to getAs<T> as cast<T> has 1572 /// to dyn_cast<T>; which is to say, the underlying type *must* 1573 /// have the intended type, and this method will never return null. 1574 template <typename T> const T *castAs() const; 1575 1576 /// A variant of castAs<> for array type which silently discards 1577 /// qualifiers from the outermost type. 1578 const ArrayType *castAsArrayTypeUnsafe() const; 1579 1580 /// getBaseElementTypeUnsafe - Get the base element type of this 1581 /// type, potentially discarding type qualifiers. This method 1582 /// should never be used when type qualifiers are meaningful. 1583 const Type *getBaseElementTypeUnsafe() const; 1584 1585 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 1586 /// element type of the array, potentially with type qualifiers missing. 1587 /// This method should never be used when type qualifiers are meaningful. 1588 const Type *getArrayElementTypeNoTypeQual() const; 1589 1590 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 1591 /// pointer, this returns the respective pointee. 1592 QualType getPointeeType() const; 1593 1594 /// getUnqualifiedDesugaredType() - Return the specified type with 1595 /// any "sugar" removed from the type, removing any typedefs, 1596 /// typeofs, etc., as well as any qualifiers. 1597 const Type *getUnqualifiedDesugaredType() const; 1598 1599 /// More type predicates useful for type checking/promotion 1600 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 1601 1602 /// isSignedIntegerType - Return true if this is an integer type that is 1603 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 1604 /// or an enum decl which has a signed representation. 1605 bool isSignedIntegerType() const; 1606 1607 /// isUnsignedIntegerType - Return true if this is an integer type that is 1608 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], 1609 /// or an enum decl which has an unsigned representation. 1610 bool isUnsignedIntegerType() const; 1611 1612 /// Determines whether this is an integer type that is signed or an 1613 /// enumeration types whose underlying type is a signed integer type. 1614 bool isSignedIntegerOrEnumerationType() const; 1615 1616 /// Determines whether this is an integer type that is unsigned or an 1617 /// enumeration types whose underlying type is a unsigned integer type. 1618 bool isUnsignedIntegerOrEnumerationType() const; 1619 1620 /// isConstantSizeType - Return true if this is not a variable sized type, 1621 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 1622 /// incomplete types. 1623 bool isConstantSizeType() const; 1624 1625 /// isSpecifierType - Returns true if this type can be represented by some 1626 /// set of type specifiers. 1627 bool isSpecifierType() const; 1628 1629 /// \brief Determine the linkage of this type. 1630 Linkage getLinkage() const; 1631 1632 /// \brief Determine the visibility of this type. 1633 Visibility getVisibility() const; 1634 1635 /// \brief Determine the linkage and visibility of this type. 1636 std::pair<Linkage,Visibility> getLinkageAndVisibility() const; 1637 1638 /// \brief Note that the linkage is no longer known. 1639 void ClearLinkageCache(); 1640 1641 const char *getTypeClassName() const; 1642 1643 QualType getCanonicalTypeInternal() const { 1644 return CanonicalType; 1645 } 1646 CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h 1647 void dump() const; 1648 1649 static bool classof(const Type *) { return true; } 1650 1651 friend class ASTReader; 1652 friend class ASTWriter; 1653}; 1654 1655template <> inline const TypedefType *Type::getAs() const { 1656 return dyn_cast<TypedefType>(this); 1657} 1658 1659// We can do canonical leaf types faster, because we don't have to 1660// worry about preserving child type decoration. 1661#define TYPE(Class, Base) 1662#define LEAF_TYPE(Class) \ 1663template <> inline const Class##Type *Type::getAs() const { \ 1664 return dyn_cast<Class##Type>(CanonicalType); \ 1665} \ 1666template <> inline const Class##Type *Type::castAs() const { \ 1667 return cast<Class##Type>(CanonicalType); \ 1668} 1669#include "clang/AST/TypeNodes.def" 1670 1671 1672/// BuiltinType - This class is used for builtin types like 'int'. Builtin 1673/// types are always canonical and have a literal name field. 1674class BuiltinType : public Type { 1675public: 1676 enum Kind { 1677 Void, 1678 1679 Bool, // This is bool and/or _Bool. 1680 Char_U, // This is 'char' for targets where char is unsigned. 1681 UChar, // This is explicitly qualified unsigned char. 1682 WChar_U, // This is 'wchar_t' for C++, when unsigned. 1683 Char16, // This is 'char16_t' for C++. 1684 Char32, // This is 'char32_t' for C++. 1685 UShort, 1686 UInt, 1687 ULong, 1688 ULongLong, 1689 UInt128, // __uint128_t 1690 1691 Char_S, // This is 'char' for targets where char is signed. 1692 SChar, // This is explicitly qualified signed char. 1693 WChar_S, // This is 'wchar_t' for C++, when signed. 1694 Short, 1695 Int, 1696 Long, 1697 LongLong, 1698 Int128, // __int128_t 1699 1700 Float, Double, LongDouble, 1701 1702 NullPtr, // This is the type of C++0x 'nullptr'. 1703 1704 /// The primitive Objective C 'id' type. The user-visible 'id' 1705 /// type is a typedef of an ObjCObjectPointerType to an 1706 /// ObjCObjectType with this as its base. In fact, this only ever 1707 /// shows up in an AST as the base type of an ObjCObjectType. 1708 ObjCId, 1709 1710 /// The primitive Objective C 'Class' type. The user-visible 1711 /// 'Class' type is a typedef of an ObjCObjectPointerType to an 1712 /// ObjCObjectType with this as its base. In fact, this only ever 1713 /// shows up in an AST as the base type of an ObjCObjectType. 1714 ObjCClass, 1715 1716 /// The primitive Objective C 'SEL' type. The user-visible 'SEL' 1717 /// type is a typedef of a PointerType to this. 1718 ObjCSel, 1719 1720 /// This represents the type of an expression whose type is 1721 /// totally unknown, e.g. 'T::foo'. It is permitted for this to 1722 /// appear in situations where the structure of the type is 1723 /// theoretically deducible. 1724 Dependent, 1725 1726 /// The type of an unresolved overload set. A placeholder type. 1727 /// Expressions with this type have one of the following basic 1728 /// forms, with parentheses generally permitted: 1729 /// foo # possibly qualified, not if an implicit access 1730 /// foo # possibly qualified, not if an implicit access 1731 /// &foo # possibly qualified, not if an implicit access 1732 /// x->foo # only if might be a static member function 1733 /// &x->foo # only if might be a static member function 1734 /// &Class::foo # when a pointer-to-member; sub-expr also has this type 1735 /// OverloadExpr::find can be used to analyze the expression. 1736 Overload, 1737 1738 /// The type of a bound C++ non-static member function. 1739 /// A placeholder type. Expressions with this type have one of the 1740 /// following basic forms: 1741 /// foo # if an implicit access 1742 /// x->foo # if only contains non-static members 1743 BoundMember, 1744 1745 /// __builtin_any_type. A placeholder type. Useful for clients 1746 /// like debuggers that don't know what type to give something. 1747 /// Only a small number of operations are valid on expressions of 1748 /// unknown type, most notably explicit casts. 1749 UnknownAny 1750 }; 1751 1752public: 1753 BuiltinType(Kind K) 1754 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent), 1755 /*InstantiationDependent=*/(K == Dependent), 1756 /*VariablyModified=*/false, 1757 /*Unexpanded paramter pack=*/false) { 1758 BuiltinTypeBits.Kind = K; 1759 } 1760 1761 Kind getKind() const { return static_cast<Kind>(BuiltinTypeBits.Kind); } 1762 const char *getName(const PrintingPolicy &Policy) const; 1763 1764 bool isSugared() const { return false; } 1765 QualType desugar() const { return QualType(this, 0); } 1766 1767 bool isInteger() const { 1768 return getKind() >= Bool && getKind() <= Int128; 1769 } 1770 1771 bool isSignedInteger() const { 1772 return getKind() >= Char_S && getKind() <= Int128; 1773 } 1774 1775 bool isUnsignedInteger() const { 1776 return getKind() >= Bool && getKind() <= UInt128; 1777 } 1778 1779 bool isFloatingPoint() const { 1780 return getKind() >= Float && getKind() <= LongDouble; 1781 } 1782 1783 /// Determines whether this type is a placeholder type, i.e. a type 1784 /// which cannot appear in arbitrary positions in a fully-formed 1785 /// expression. 1786 bool isPlaceholderType() const { 1787 return getKind() >= Overload; 1788 } 1789 1790 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1791 static bool classof(const BuiltinType *) { return true; } 1792}; 1793 1794/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1795/// types (_Complex float etc) as well as the GCC integer complex extensions. 1796/// 1797class ComplexType : public Type, public llvm::FoldingSetNode { 1798 QualType ElementType; 1799 ComplexType(QualType Element, QualType CanonicalPtr) : 1800 Type(Complex, CanonicalPtr, Element->isDependentType(), 1801 Element->isInstantiationDependentType(), 1802 Element->isVariablyModifiedType(), 1803 Element->containsUnexpandedParameterPack()), 1804 ElementType(Element) { 1805 } 1806 friend class ASTContext; // ASTContext creates these. 1807 1808public: 1809 QualType getElementType() const { return ElementType; } 1810 1811 bool isSugared() const { return false; } 1812 QualType desugar() const { return QualType(this, 0); } 1813 1814 void Profile(llvm::FoldingSetNodeID &ID) { 1815 Profile(ID, getElementType()); 1816 } 1817 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1818 ID.AddPointer(Element.getAsOpaquePtr()); 1819 } 1820 1821 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1822 static bool classof(const ComplexType *) { return true; } 1823}; 1824 1825/// ParenType - Sugar for parentheses used when specifying types. 1826/// 1827class ParenType : public Type, public llvm::FoldingSetNode { 1828 QualType Inner; 1829 1830 ParenType(QualType InnerType, QualType CanonType) : 1831 Type(Paren, CanonType, InnerType->isDependentType(), 1832 InnerType->isInstantiationDependentType(), 1833 InnerType->isVariablyModifiedType(), 1834 InnerType->containsUnexpandedParameterPack()), 1835 Inner(InnerType) { 1836 } 1837 friend class ASTContext; // ASTContext creates these. 1838 1839public: 1840 1841 QualType getInnerType() const { return Inner; } 1842 1843 bool isSugared() const { return true; } 1844 QualType desugar() const { return getInnerType(); } 1845 1846 void Profile(llvm::FoldingSetNodeID &ID) { 1847 Profile(ID, getInnerType()); 1848 } 1849 static void Profile(llvm::FoldingSetNodeID &ID, QualType Inner) { 1850 Inner.Profile(ID); 1851 } 1852 1853 static bool classof(const Type *T) { return T->getTypeClass() == Paren; } 1854 static bool classof(const ParenType *) { return true; } 1855}; 1856 1857/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1858/// 1859class PointerType : public Type, public llvm::FoldingSetNode { 1860 QualType PointeeType; 1861 1862 PointerType(QualType Pointee, QualType CanonicalPtr) : 1863 Type(Pointer, CanonicalPtr, Pointee->isDependentType(), 1864 Pointee->isInstantiationDependentType(), 1865 Pointee->isVariablyModifiedType(), 1866 Pointee->containsUnexpandedParameterPack()), 1867 PointeeType(Pointee) { 1868 } 1869 friend class ASTContext; // ASTContext creates these. 1870 1871public: 1872 1873 QualType getPointeeType() const { return PointeeType; } 1874 1875 bool isSugared() const { return false; } 1876 QualType desugar() const { return QualType(this, 0); } 1877 1878 void Profile(llvm::FoldingSetNodeID &ID) { 1879 Profile(ID, getPointeeType()); 1880 } 1881 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1882 ID.AddPointer(Pointee.getAsOpaquePtr()); 1883 } 1884 1885 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1886 static bool classof(const PointerType *) { return true; } 1887}; 1888 1889/// BlockPointerType - pointer to a block type. 1890/// This type is to represent types syntactically represented as 1891/// "void (^)(int)", etc. Pointee is required to always be a function type. 1892/// 1893class BlockPointerType : public Type, public llvm::FoldingSetNode { 1894 QualType PointeeType; // Block is some kind of pointer type 1895 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1896 Type(BlockPointer, CanonicalCls, Pointee->isDependentType(), 1897 Pointee->isInstantiationDependentType(), 1898 Pointee->isVariablyModifiedType(), 1899 Pointee->containsUnexpandedParameterPack()), 1900 PointeeType(Pointee) { 1901 } 1902 friend class ASTContext; // ASTContext creates these. 1903 1904public: 1905 1906 // Get the pointee type. Pointee is required to always be a function type. 1907 QualType getPointeeType() const { return PointeeType; } 1908 1909 bool isSugared() const { return false; } 1910 QualType desugar() const { return QualType(this, 0); } 1911 1912 void Profile(llvm::FoldingSetNodeID &ID) { 1913 Profile(ID, getPointeeType()); 1914 } 1915 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1916 ID.AddPointer(Pointee.getAsOpaquePtr()); 1917 } 1918 1919 static bool classof(const Type *T) { 1920 return T->getTypeClass() == BlockPointer; 1921 } 1922 static bool classof(const BlockPointerType *) { return true; } 1923}; 1924 1925/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 1926/// 1927class ReferenceType : public Type, public llvm::FoldingSetNode { 1928 QualType PointeeType; 1929 1930protected: 1931 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 1932 bool SpelledAsLValue) : 1933 Type(tc, CanonicalRef, Referencee->isDependentType(), 1934 Referencee->isInstantiationDependentType(), 1935 Referencee->isVariablyModifiedType(), 1936 Referencee->containsUnexpandedParameterPack()), 1937 PointeeType(Referencee) 1938 { 1939 ReferenceTypeBits.SpelledAsLValue = SpelledAsLValue; 1940 ReferenceTypeBits.InnerRef = Referencee->isReferenceType(); 1941 } 1942 1943public: 1944 bool isSpelledAsLValue() const { return ReferenceTypeBits.SpelledAsLValue; } 1945 bool isInnerRef() const { return ReferenceTypeBits.InnerRef; } 1946 1947 QualType getPointeeTypeAsWritten() const { return PointeeType; } 1948 QualType getPointeeType() const { 1949 // FIXME: this might strip inner qualifiers; okay? 1950 const ReferenceType *T = this; 1951 while (T->isInnerRef()) 1952 T = T->PointeeType->castAs<ReferenceType>(); 1953 return T->PointeeType; 1954 } 1955 1956 void Profile(llvm::FoldingSetNodeID &ID) { 1957 Profile(ID, PointeeType, isSpelledAsLValue()); 1958 } 1959 static void Profile(llvm::FoldingSetNodeID &ID, 1960 QualType Referencee, 1961 bool SpelledAsLValue) { 1962 ID.AddPointer(Referencee.getAsOpaquePtr()); 1963 ID.AddBoolean(SpelledAsLValue); 1964 } 1965 1966 static bool classof(const Type *T) { 1967 return T->getTypeClass() == LValueReference || 1968 T->getTypeClass() == RValueReference; 1969 } 1970 static bool classof(const ReferenceType *) { return true; } 1971}; 1972 1973/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 1974/// 1975class LValueReferenceType : public ReferenceType { 1976 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 1977 bool SpelledAsLValue) : 1978 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 1979 {} 1980 friend class ASTContext; // ASTContext creates these 1981public: 1982 bool isSugared() const { return false; } 1983 QualType desugar() const { return QualType(this, 0); } 1984 1985 static bool classof(const Type *T) { 1986 return T->getTypeClass() == LValueReference; 1987 } 1988 static bool classof(const LValueReferenceType *) { return true; } 1989}; 1990 1991/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 1992/// 1993class RValueReferenceType : public ReferenceType { 1994 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 1995 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 1996 } 1997 friend class ASTContext; // ASTContext creates these 1998public: 1999 bool isSugared() const { return false; } 2000 QualType desugar() const { return QualType(this, 0); } 2001 2002 static bool classof(const Type *T) { 2003 return T->getTypeClass() == RValueReference; 2004 } 2005 static bool classof(const RValueReferenceType *) { return true; } 2006}; 2007 2008/// MemberPointerType - C++ 8.3.3 - Pointers to members 2009/// 2010class MemberPointerType : public Type, public llvm::FoldingSetNode { 2011 QualType PointeeType; 2012 /// The class of which the pointee is a member. Must ultimately be a 2013 /// RecordType, but could be a typedef or a template parameter too. 2014 const Type *Class; 2015 2016 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 2017 Type(MemberPointer, CanonicalPtr, 2018 Cls->isDependentType() || Pointee->isDependentType(), 2019 (Cls->isInstantiationDependentType() || 2020 Pointee->isInstantiationDependentType()), 2021 Pointee->isVariablyModifiedType(), 2022 (Cls->containsUnexpandedParameterPack() || 2023 Pointee->containsUnexpandedParameterPack())), 2024 PointeeType(Pointee), Class(Cls) { 2025 } 2026 friend class ASTContext; // ASTContext creates these. 2027 2028public: 2029 QualType getPointeeType() const { return PointeeType; } 2030 2031 /// Returns true if the member type (i.e. the pointee type) is a 2032 /// function type rather than a data-member type. 2033 bool isMemberFunctionPointer() const { 2034 return PointeeType->isFunctionProtoType(); 2035 } 2036 2037 /// Returns true if the member type (i.e. the pointee type) is a 2038 /// data type rather than a function type. 2039 bool isMemberDataPointer() const { 2040 return !PointeeType->isFunctionProtoType(); 2041 } 2042 2043 const Type *getClass() const { return Class; } 2044 2045 bool isSugared() const { return false; } 2046 QualType desugar() const { return QualType(this, 0); } 2047 2048 void Profile(llvm::FoldingSetNodeID &ID) { 2049 Profile(ID, getPointeeType(), getClass()); 2050 } 2051 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 2052 const Type *Class) { 2053 ID.AddPointer(Pointee.getAsOpaquePtr()); 2054 ID.AddPointer(Class); 2055 } 2056 2057 static bool classof(const Type *T) { 2058 return T->getTypeClass() == MemberPointer; 2059 } 2060 static bool classof(const MemberPointerType *) { return true; } 2061}; 2062 2063/// ArrayType - C99 6.7.5.2 - Array Declarators. 2064/// 2065class ArrayType : public Type, public llvm::FoldingSetNode { 2066public: 2067 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 2068 /// an array with a static size (e.g. int X[static 4]), or an array 2069 /// with a star size (e.g. int X[*]). 2070 /// 'static' is only allowed on function parameters. 2071 enum ArraySizeModifier { 2072 Normal, Static, Star 2073 }; 2074private: 2075 /// ElementType - The element type of the array. 2076 QualType ElementType; 2077 2078protected: 2079 // C++ [temp.dep.type]p1: 2080 // A type is dependent if it is... 2081 // - an array type constructed from any dependent type or whose 2082 // size is specified by a constant expression that is 2083 // value-dependent, 2084 ArrayType(TypeClass tc, QualType et, QualType can, 2085 ArraySizeModifier sm, unsigned tq, 2086 bool ContainsUnexpandedParameterPack) 2087 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray, 2088 et->isInstantiationDependentType() || tc == DependentSizedArray, 2089 (tc == VariableArray || et->isVariablyModifiedType()), 2090 ContainsUnexpandedParameterPack), 2091 ElementType(et) { 2092 ArrayTypeBits.IndexTypeQuals = tq; 2093 ArrayTypeBits.SizeModifier = sm; 2094 } 2095 2096 friend class ASTContext; // ASTContext creates these. 2097 2098public: 2099 QualType getElementType() const { return ElementType; } 2100 ArraySizeModifier getSizeModifier() const { 2101 return ArraySizeModifier(ArrayTypeBits.SizeModifier); 2102 } 2103 Qualifiers getIndexTypeQualifiers() const { 2104 return Qualifiers::fromCVRMask(getIndexTypeCVRQualifiers()); 2105 } 2106 unsigned getIndexTypeCVRQualifiers() const { 2107 return ArrayTypeBits.IndexTypeQuals; 2108 } 2109 2110 static bool classof(const Type *T) { 2111 return T->getTypeClass() == ConstantArray || 2112 T->getTypeClass() == VariableArray || 2113 T->getTypeClass() == IncompleteArray || 2114 T->getTypeClass() == DependentSizedArray; 2115 } 2116 static bool classof(const ArrayType *) { return true; } 2117}; 2118 2119/// ConstantArrayType - This class represents the canonical version of 2120/// C arrays with a specified constant size. For example, the canonical 2121/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 2122/// type is 'int' and the size is 404. 2123class ConstantArrayType : public ArrayType { 2124 llvm::APInt Size; // Allows us to unique the type. 2125 2126 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 2127 ArraySizeModifier sm, unsigned tq) 2128 : ArrayType(ConstantArray, et, can, sm, tq, 2129 et->containsUnexpandedParameterPack()), 2130 Size(size) {} 2131protected: 2132 ConstantArrayType(TypeClass tc, QualType et, QualType can, 2133 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 2134 : ArrayType(tc, et, can, sm, tq, et->containsUnexpandedParameterPack()), 2135 Size(size) {} 2136 friend class ASTContext; // ASTContext creates these. 2137public: 2138 const llvm::APInt &getSize() const { return Size; } 2139 bool isSugared() const { return false; } 2140 QualType desugar() const { return QualType(this, 0); } 2141 2142 2143 /// \brief Determine the number of bits required to address a member of 2144 // an array with the given element type and number of elements. 2145 static unsigned getNumAddressingBits(ASTContext &Context, 2146 QualType ElementType, 2147 const llvm::APInt &NumElements); 2148 2149 /// \brief Determine the maximum number of active bits that an array's size 2150 /// can require, which limits the maximum size of the array. 2151 static unsigned getMaxSizeBits(ASTContext &Context); 2152 2153 void Profile(llvm::FoldingSetNodeID &ID) { 2154 Profile(ID, getElementType(), getSize(), 2155 getSizeModifier(), getIndexTypeCVRQualifiers()); 2156 } 2157 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 2158 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 2159 unsigned TypeQuals) { 2160 ID.AddPointer(ET.getAsOpaquePtr()); 2161 ID.AddInteger(ArraySize.getZExtValue()); 2162 ID.AddInteger(SizeMod); 2163 ID.AddInteger(TypeQuals); 2164 } 2165 static bool classof(const Type *T) { 2166 return T->getTypeClass() == ConstantArray; 2167 } 2168 static bool classof(const ConstantArrayType *) { return true; } 2169}; 2170 2171/// IncompleteArrayType - This class represents C arrays with an unspecified 2172/// size. For example 'int A[]' has an IncompleteArrayType where the element 2173/// type is 'int' and the size is unspecified. 2174class IncompleteArrayType : public ArrayType { 2175 2176 IncompleteArrayType(QualType et, QualType can, 2177 ArraySizeModifier sm, unsigned tq) 2178 : ArrayType(IncompleteArray, et, can, sm, tq, 2179 et->containsUnexpandedParameterPack()) {} 2180 friend class ASTContext; // ASTContext creates these. 2181public: 2182 bool isSugared() const { return false; } 2183 QualType desugar() const { return QualType(this, 0); } 2184 2185 static bool classof(const Type *T) { 2186 return T->getTypeClass() == IncompleteArray; 2187 } 2188 static bool classof(const IncompleteArrayType *) { return true; } 2189 2190 friend class StmtIteratorBase; 2191 2192 void Profile(llvm::FoldingSetNodeID &ID) { 2193 Profile(ID, getElementType(), getSizeModifier(), 2194 getIndexTypeCVRQualifiers()); 2195 } 2196 2197 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 2198 ArraySizeModifier SizeMod, unsigned TypeQuals) { 2199 ID.AddPointer(ET.getAsOpaquePtr()); 2200 ID.AddInteger(SizeMod); 2201 ID.AddInteger(TypeQuals); 2202 } 2203}; 2204 2205/// VariableArrayType - This class represents C arrays with a specified size 2206/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 2207/// Since the size expression is an arbitrary expression, we store it as such. 2208/// 2209/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 2210/// should not be: two lexically equivalent variable array types could mean 2211/// different things, for example, these variables do not have the same type 2212/// dynamically: 2213/// 2214/// void foo(int x) { 2215/// int Y[x]; 2216/// ++x; 2217/// int Z[x]; 2218/// } 2219/// 2220class VariableArrayType : public ArrayType { 2221 /// SizeExpr - An assignment expression. VLA's are only permitted within 2222 /// a function block. 2223 Stmt *SizeExpr; 2224 /// Brackets - The left and right array brackets. 2225 SourceRange Brackets; 2226 2227 VariableArrayType(QualType et, QualType can, Expr *e, 2228 ArraySizeModifier sm, unsigned tq, 2229 SourceRange brackets) 2230 : ArrayType(VariableArray, et, can, sm, tq, 2231 et->containsUnexpandedParameterPack()), 2232 SizeExpr((Stmt*) e), Brackets(brackets) {} 2233 friend class ASTContext; // ASTContext creates these. 2234 2235public: 2236 Expr *getSizeExpr() const { 2237 // We use C-style casts instead of cast<> here because we do not wish 2238 // to have a dependency of Type.h on Stmt.h/Expr.h. 2239 return (Expr*) SizeExpr; 2240 } 2241 SourceRange getBracketsRange() const { return Brackets; } 2242 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 2243 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 2244 2245 bool isSugared() const { return false; } 2246 QualType desugar() const { return QualType(this, 0); } 2247 2248 static bool classof(const Type *T) { 2249 return T->getTypeClass() == VariableArray; 2250 } 2251 static bool classof(const VariableArrayType *) { return true; } 2252 2253 friend class StmtIteratorBase; 2254 2255 void Profile(llvm::FoldingSetNodeID &ID) { 2256 llvm_unreachable("Cannot unique VariableArrayTypes."); 2257 } 2258}; 2259 2260/// DependentSizedArrayType - This type represents an array type in 2261/// C++ whose size is a value-dependent expression. For example: 2262/// 2263/// \code 2264/// template<typename T, int Size> 2265/// class array { 2266/// T data[Size]; 2267/// }; 2268/// \endcode 2269/// 2270/// For these types, we won't actually know what the array bound is 2271/// until template instantiation occurs, at which point this will 2272/// become either a ConstantArrayType or a VariableArrayType. 2273class DependentSizedArrayType : public ArrayType { 2274 const ASTContext &Context; 2275 2276 /// \brief An assignment expression that will instantiate to the 2277 /// size of the array. 2278 /// 2279 /// The expression itself might be NULL, in which case the array 2280 /// type will have its size deduced from an initializer. 2281 Stmt *SizeExpr; 2282 2283 /// Brackets - The left and right array brackets. 2284 SourceRange Brackets; 2285 2286 DependentSizedArrayType(const ASTContext &Context, QualType et, QualType can, 2287 Expr *e, ArraySizeModifier sm, unsigned tq, 2288 SourceRange brackets); 2289 2290 friend class ASTContext; // ASTContext creates these. 2291 2292public: 2293 Expr *getSizeExpr() const { 2294 // We use C-style casts instead of cast<> here because we do not wish 2295 // to have a dependency of Type.h on Stmt.h/Expr.h. 2296 return (Expr*) SizeExpr; 2297 } 2298 SourceRange getBracketsRange() const { return Brackets; } 2299 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 2300 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 2301 2302 bool isSugared() const { return false; } 2303 QualType desugar() const { return QualType(this, 0); } 2304 2305 static bool classof(const Type *T) { 2306 return T->getTypeClass() == DependentSizedArray; 2307 } 2308 static bool classof(const DependentSizedArrayType *) { return true; } 2309 2310 friend class StmtIteratorBase; 2311 2312 2313 void Profile(llvm::FoldingSetNodeID &ID) { 2314 Profile(ID, Context, getElementType(), 2315 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 2316 } 2317 2318 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2319 QualType ET, ArraySizeModifier SizeMod, 2320 unsigned TypeQuals, Expr *E); 2321}; 2322 2323/// DependentSizedExtVectorType - This type represent an extended vector type 2324/// where either the type or size is dependent. For example: 2325/// @code 2326/// template<typename T, int Size> 2327/// class vector { 2328/// typedef T __attribute__((ext_vector_type(Size))) type; 2329/// } 2330/// @endcode 2331class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 2332 const ASTContext &Context; 2333 Expr *SizeExpr; 2334 /// ElementType - The element type of the array. 2335 QualType ElementType; 2336 SourceLocation loc; 2337 2338 DependentSizedExtVectorType(const ASTContext &Context, QualType ElementType, 2339 QualType can, Expr *SizeExpr, SourceLocation loc); 2340 2341 friend class ASTContext; 2342 2343public: 2344 Expr *getSizeExpr() const { return SizeExpr; } 2345 QualType getElementType() const { return ElementType; } 2346 SourceLocation getAttributeLoc() const { return loc; } 2347 2348 bool isSugared() const { return false; } 2349 QualType desugar() const { return QualType(this, 0); } 2350 2351 static bool classof(const Type *T) { 2352 return T->getTypeClass() == DependentSizedExtVector; 2353 } 2354 static bool classof(const DependentSizedExtVectorType *) { return true; } 2355 2356 void Profile(llvm::FoldingSetNodeID &ID) { 2357 Profile(ID, Context, getElementType(), getSizeExpr()); 2358 } 2359 2360 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2361 QualType ElementType, Expr *SizeExpr); 2362}; 2363 2364 2365/// VectorType - GCC generic vector type. This type is created using 2366/// __attribute__((vector_size(n)), where "n" specifies the vector size in 2367/// bytes; or from an Altivec __vector or vector declaration. 2368/// Since the constructor takes the number of vector elements, the 2369/// client is responsible for converting the size into the number of elements. 2370class VectorType : public Type, public llvm::FoldingSetNode { 2371public: 2372 enum VectorKind { 2373 GenericVector, // not a target-specific vector type 2374 AltiVecVector, // is AltiVec vector 2375 AltiVecPixel, // is AltiVec 'vector Pixel' 2376 AltiVecBool, // is AltiVec 'vector bool ...' 2377 NeonVector, // is ARM Neon vector 2378 NeonPolyVector // is ARM Neon polynomial vector 2379 }; 2380protected: 2381 /// ElementType - The element type of the vector. 2382 QualType ElementType; 2383 2384 VectorType(QualType vecType, unsigned nElements, QualType canonType, 2385 VectorKind vecKind); 2386 2387 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 2388 QualType canonType, VectorKind vecKind); 2389 2390 friend class ASTContext; // ASTContext creates these. 2391 2392public: 2393 2394 QualType getElementType() const { return ElementType; } 2395 unsigned getNumElements() const { return VectorTypeBits.NumElements; } 2396 2397 bool isSugared() const { return false; } 2398 QualType desugar() const { return QualType(this, 0); } 2399 2400 VectorKind getVectorKind() const { 2401 return VectorKind(VectorTypeBits.VecKind); 2402 } 2403 2404 void Profile(llvm::FoldingSetNodeID &ID) { 2405 Profile(ID, getElementType(), getNumElements(), 2406 getTypeClass(), getVectorKind()); 2407 } 2408 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 2409 unsigned NumElements, TypeClass TypeClass, 2410 VectorKind VecKind) { 2411 ID.AddPointer(ElementType.getAsOpaquePtr()); 2412 ID.AddInteger(NumElements); 2413 ID.AddInteger(TypeClass); 2414 ID.AddInteger(VecKind); 2415 } 2416 2417 static bool classof(const Type *T) { 2418 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 2419 } 2420 static bool classof(const VectorType *) { return true; } 2421}; 2422 2423/// ExtVectorType - Extended vector type. This type is created using 2424/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 2425/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 2426/// class enables syntactic extensions, like Vector Components for accessing 2427/// points, colors, and textures (modeled after OpenGL Shading Language). 2428class ExtVectorType : public VectorType { 2429 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 2430 VectorType(ExtVector, vecType, nElements, canonType, GenericVector) {} 2431 friend class ASTContext; // ASTContext creates these. 2432public: 2433 static int getPointAccessorIdx(char c) { 2434 switch (c) { 2435 default: return -1; 2436 case 'x': return 0; 2437 case 'y': return 1; 2438 case 'z': return 2; 2439 case 'w': return 3; 2440 } 2441 } 2442 static int getNumericAccessorIdx(char c) { 2443 switch (c) { 2444 default: return -1; 2445 case '0': return 0; 2446 case '1': return 1; 2447 case '2': return 2; 2448 case '3': return 3; 2449 case '4': return 4; 2450 case '5': return 5; 2451 case '6': return 6; 2452 case '7': return 7; 2453 case '8': return 8; 2454 case '9': return 9; 2455 case 'A': 2456 case 'a': return 10; 2457 case 'B': 2458 case 'b': return 11; 2459 case 'C': 2460 case 'c': return 12; 2461 case 'D': 2462 case 'd': return 13; 2463 case 'E': 2464 case 'e': return 14; 2465 case 'F': 2466 case 'f': return 15; 2467 } 2468 } 2469 2470 static int getAccessorIdx(char c) { 2471 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 2472 return getNumericAccessorIdx(c); 2473 } 2474 2475 bool isAccessorWithinNumElements(char c) const { 2476 if (int idx = getAccessorIdx(c)+1) 2477 return unsigned(idx-1) < getNumElements(); 2478 return false; 2479 } 2480 bool isSugared() const { return false; } 2481 QualType desugar() const { return QualType(this, 0); } 2482 2483 static bool classof(const Type *T) { 2484 return T->getTypeClass() == ExtVector; 2485 } 2486 static bool classof(const ExtVectorType *) { return true; } 2487}; 2488 2489/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 2490/// class of FunctionNoProtoType and FunctionProtoType. 2491/// 2492class FunctionType : public Type { 2493 // The type returned by the function. 2494 QualType ResultType; 2495 2496 public: 2497 /// ExtInfo - A class which abstracts out some details necessary for 2498 /// making a call. 2499 /// 2500 /// It is not actually used directly for storing this information in 2501 /// a FunctionType, although FunctionType does currently use the 2502 /// same bit-pattern. 2503 /// 2504 // If you add a field (say Foo), other than the obvious places (both, 2505 // constructors, compile failures), what you need to update is 2506 // * Operator== 2507 // * getFoo 2508 // * withFoo 2509 // * functionType. Add Foo, getFoo. 2510 // * ASTContext::getFooType 2511 // * ASTContext::mergeFunctionTypes 2512 // * FunctionNoProtoType::Profile 2513 // * FunctionProtoType::Profile 2514 // * TypePrinter::PrintFunctionProto 2515 // * AST read and write 2516 // * Codegen 2517 class ExtInfo { 2518 // Feel free to rearrange or add bits, but if you go over 8, 2519 // you'll need to adjust both the Bits field below and 2520 // Type::FunctionTypeBitfields. 2521 2522 // | CC |noreturn|produces|regparm| 2523 // |0 .. 2| 3 | 4 | 5 .. 7| 2524 // 2525 // regparm is either 0 (no regparm attribute) or the regparm value+1. 2526 enum { CallConvMask = 0x7 }; 2527 enum { NoReturnMask = 0x8 }; 2528 enum { ProducesResultMask = 0x10 }; 2529 enum { RegParmMask = ~(CallConvMask | NoReturnMask | ProducesResultMask), 2530 RegParmOffset = 5 }; // Assumed to be the last field 2531 2532 uint16_t Bits; 2533 2534 ExtInfo(unsigned Bits) : Bits(static_cast<uint16_t>(Bits)) {} 2535 2536 friend class FunctionType; 2537 2538 public: 2539 // Constructor with no defaults. Use this when you know that you 2540 // have all the elements (when reading an AST file for example). 2541 ExtInfo(bool noReturn, bool hasRegParm, unsigned regParm, CallingConv cc, 2542 bool producesResult) { 2543 assert((!hasRegParm || regParm < 7) && "Invalid regparm value"); 2544 Bits = ((unsigned) cc) | 2545 (noReturn ? NoReturnMask : 0) | 2546 (producesResult ? ProducesResultMask : 0) | 2547 (hasRegParm ? ((regParm + 1) << RegParmOffset) : 0); 2548 } 2549 2550 // Constructor with all defaults. Use when for example creating a 2551 // function know to use defaults. 2552 ExtInfo() : Bits(0) {} 2553 2554 bool getNoReturn() const { return Bits & NoReturnMask; } 2555 bool getProducesResult() const { return Bits & ProducesResultMask; } 2556 bool getHasRegParm() const { return (Bits >> RegParmOffset) != 0; } 2557 unsigned getRegParm() const { 2558 unsigned RegParm = Bits >> RegParmOffset; 2559 if (RegParm > 0) 2560 --RegParm; 2561 return RegParm; 2562 } 2563 CallingConv getCC() const { return CallingConv(Bits & CallConvMask); } 2564 2565 bool operator==(ExtInfo Other) const { 2566 return Bits == Other.Bits; 2567 } 2568 bool operator!=(ExtInfo Other) const { 2569 return Bits != Other.Bits; 2570 } 2571 2572 // Note that we don't have setters. That is by design, use 2573 // the following with methods instead of mutating these objects. 2574 2575 ExtInfo withNoReturn(bool noReturn) const { 2576 if (noReturn) 2577 return ExtInfo(Bits | NoReturnMask); 2578 else 2579 return ExtInfo(Bits & ~NoReturnMask); 2580 } 2581 2582 ExtInfo withProducesResult(bool producesResult) const { 2583 if (producesResult) 2584 return ExtInfo(Bits | ProducesResultMask); 2585 else 2586 return ExtInfo(Bits & ~ProducesResultMask); 2587 } 2588 2589 ExtInfo withRegParm(unsigned RegParm) const { 2590 assert(RegParm < 7 && "Invalid regparm value"); 2591 return ExtInfo((Bits & ~RegParmMask) | 2592 ((RegParm + 1) << RegParmOffset)); 2593 } 2594 2595 ExtInfo withCallingConv(CallingConv cc) const { 2596 return ExtInfo((Bits & ~CallConvMask) | (unsigned) cc); 2597 } 2598 2599 void Profile(llvm::FoldingSetNodeID &ID) const { 2600 ID.AddInteger(Bits); 2601 } 2602 }; 2603 2604protected: 2605 FunctionType(TypeClass tc, QualType res, bool variadic, 2606 unsigned typeQuals, RefQualifierKind RefQualifier, 2607 QualType Canonical, bool Dependent, 2608 bool InstantiationDependent, 2609 bool VariablyModified, bool ContainsUnexpandedParameterPack, 2610 ExtInfo Info) 2611 : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified, 2612 ContainsUnexpandedParameterPack), 2613 ResultType(res) { 2614 FunctionTypeBits.ExtInfo = Info.Bits; 2615 FunctionTypeBits.Variadic = variadic; 2616 FunctionTypeBits.TypeQuals = typeQuals; 2617 FunctionTypeBits.RefQualifier = static_cast<unsigned>(RefQualifier); 2618 } 2619 bool isVariadic() const { return FunctionTypeBits.Variadic; } 2620 unsigned getTypeQuals() const { return FunctionTypeBits.TypeQuals; } 2621 2622 RefQualifierKind getRefQualifier() const { 2623 return static_cast<RefQualifierKind>(FunctionTypeBits.RefQualifier); 2624 } 2625 2626public: 2627 2628 QualType getResultType() const { return ResultType; } 2629 2630 bool getHasRegParm() const { return getExtInfo().getHasRegParm(); } 2631 unsigned getRegParmType() const { return getExtInfo().getRegParm(); } 2632 bool getNoReturnAttr() const { return getExtInfo().getNoReturn(); } 2633 CallingConv getCallConv() const { return getExtInfo().getCC(); } 2634 ExtInfo getExtInfo() const { return ExtInfo(FunctionTypeBits.ExtInfo); } 2635 2636 /// \brief Determine the type of an expression that calls a function of 2637 /// this type. 2638 QualType getCallResultType(ASTContext &Context) const { 2639 return getResultType().getNonLValueExprType(Context); 2640 } 2641 2642 static StringRef getNameForCallConv(CallingConv CC); 2643 2644 static bool classof(const Type *T) { 2645 return T->getTypeClass() == FunctionNoProto || 2646 T->getTypeClass() == FunctionProto; 2647 } 2648 static bool classof(const FunctionType *) { return true; } 2649}; 2650 2651/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 2652/// no information available about its arguments. 2653class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 2654 FunctionNoProtoType(QualType Result, QualType Canonical, ExtInfo Info) 2655 : FunctionType(FunctionNoProto, Result, false, 0, RQ_None, Canonical, 2656 /*Dependent=*/false, /*InstantiationDependent=*/false, 2657 Result->isVariablyModifiedType(), 2658 /*ContainsUnexpandedParameterPack=*/false, Info) {} 2659 2660 friend class ASTContext; // ASTContext creates these. 2661 2662public: 2663 // No additional state past what FunctionType provides. 2664 2665 bool isSugared() const { return false; } 2666 QualType desugar() const { return QualType(this, 0); } 2667 2668 void Profile(llvm::FoldingSetNodeID &ID) { 2669 Profile(ID, getResultType(), getExtInfo()); 2670 } 2671 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 2672 ExtInfo Info) { 2673 Info.Profile(ID); 2674 ID.AddPointer(ResultType.getAsOpaquePtr()); 2675 } 2676 2677 static bool classof(const Type *T) { 2678 return T->getTypeClass() == FunctionNoProto; 2679 } 2680 static bool classof(const FunctionNoProtoType *) { return true; } 2681}; 2682 2683/// FunctionProtoType - Represents a prototype with argument type info, e.g. 2684/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 2685/// arguments, not as having a single void argument. Such a type can have an 2686/// exception specification, but this specification is not part of the canonical 2687/// type. 2688class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 2689public: 2690 /// ExtProtoInfo - Extra information about a function prototype. 2691 struct ExtProtoInfo { 2692 ExtProtoInfo() : 2693 Variadic(false), ExceptionSpecType(EST_None), TypeQuals(0), 2694 RefQualifier(RQ_None), NumExceptions(0), Exceptions(0), NoexceptExpr(0), 2695 ConsumedArguments(0) {} 2696 2697 FunctionType::ExtInfo ExtInfo; 2698 bool Variadic; 2699 ExceptionSpecificationType ExceptionSpecType; 2700 unsigned char TypeQuals; 2701 RefQualifierKind RefQualifier; 2702 unsigned NumExceptions; 2703 const QualType *Exceptions; 2704 Expr *NoexceptExpr; 2705 const bool *ConsumedArguments; 2706 }; 2707 2708private: 2709 /// \brief Determine whether there are any argument types that 2710 /// contain an unexpanded parameter pack. 2711 static bool containsAnyUnexpandedParameterPack(const QualType *ArgArray, 2712 unsigned numArgs) { 2713 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 2714 if (ArgArray[Idx]->containsUnexpandedParameterPack()) 2715 return true; 2716 2717 return false; 2718 } 2719 2720 FunctionProtoType(QualType result, const QualType *args, unsigned numArgs, 2721 QualType canonical, const ExtProtoInfo &epi); 2722 2723 /// NumArgs - The number of arguments this function has, not counting '...'. 2724 unsigned NumArgs : 19; 2725 2726 /// NumExceptions - The number of types in the exception spec, if any. 2727 unsigned NumExceptions : 9; 2728 2729 /// ExceptionSpecType - The type of exception specification this function has. 2730 unsigned ExceptionSpecType : 3; 2731 2732 /// HasAnyConsumedArgs - Whether this function has any consumed arguments. 2733 unsigned HasAnyConsumedArgs : 1; 2734 2735 /// ArgInfo - There is an variable size array after the class in memory that 2736 /// holds the argument types. 2737 2738 /// Exceptions - There is another variable size array after ArgInfo that 2739 /// holds the exception types. 2740 2741 /// NoexceptExpr - Instead of Exceptions, there may be a single Expr* pointing 2742 /// to the expression in the noexcept() specifier. 2743 2744 /// ConsumedArgs - A variable size array, following Exceptions 2745 /// and of length NumArgs, holding flags indicating which arguments 2746 /// are consumed. This only appears if HasAnyConsumedArgs is true. 2747 2748 friend class ASTContext; // ASTContext creates these. 2749 2750 const bool *getConsumedArgsBuffer() const { 2751 assert(hasAnyConsumedArgs()); 2752 2753 // Find the end of the exceptions. 2754 Expr * const *eh_end = reinterpret_cast<Expr * const *>(arg_type_end()); 2755 if (getExceptionSpecType() != EST_ComputedNoexcept) 2756 eh_end += NumExceptions; 2757 else 2758 eh_end += 1; // NoexceptExpr 2759 2760 return reinterpret_cast<const bool*>(eh_end); 2761 } 2762 2763public: 2764 unsigned getNumArgs() const { return NumArgs; } 2765 QualType getArgType(unsigned i) const { 2766 assert(i < NumArgs && "Invalid argument number!"); 2767 return arg_type_begin()[i]; 2768 } 2769 2770 ExtProtoInfo getExtProtoInfo() const { 2771 ExtProtoInfo EPI; 2772 EPI.ExtInfo = getExtInfo(); 2773 EPI.Variadic = isVariadic(); 2774 EPI.ExceptionSpecType = getExceptionSpecType(); 2775 EPI.TypeQuals = static_cast<unsigned char>(getTypeQuals()); 2776 EPI.RefQualifier = getRefQualifier(); 2777 if (EPI.ExceptionSpecType == EST_Dynamic) { 2778 EPI.NumExceptions = NumExceptions; 2779 EPI.Exceptions = exception_begin(); 2780 } else if (EPI.ExceptionSpecType == EST_ComputedNoexcept) { 2781 EPI.NoexceptExpr = getNoexceptExpr(); 2782 } 2783 if (hasAnyConsumedArgs()) 2784 EPI.ConsumedArguments = getConsumedArgsBuffer(); 2785 return EPI; 2786 } 2787 2788 /// \brief Get the kind of exception specification on this function. 2789 ExceptionSpecificationType getExceptionSpecType() const { 2790 return static_cast<ExceptionSpecificationType>(ExceptionSpecType); 2791 } 2792 /// \brief Return whether this function has any kind of exception spec. 2793 bool hasExceptionSpec() const { 2794 return getExceptionSpecType() != EST_None; 2795 } 2796 /// \brief Return whether this function has a dynamic (throw) exception spec. 2797 bool hasDynamicExceptionSpec() const { 2798 return isDynamicExceptionSpec(getExceptionSpecType()); 2799 } 2800 /// \brief Return whether this function has a noexcept exception spec. 2801 bool hasNoexceptExceptionSpec() const { 2802 return isNoexceptExceptionSpec(getExceptionSpecType()); 2803 } 2804 /// \brief Result type of getNoexceptSpec(). 2805 enum NoexceptResult { 2806 NR_NoNoexcept, ///< There is no noexcept specifier. 2807 NR_BadNoexcept, ///< The noexcept specifier has a bad expression. 2808 NR_Dependent, ///< The noexcept specifier is dependent. 2809 NR_Throw, ///< The noexcept specifier evaluates to false. 2810 NR_Nothrow ///< The noexcept specifier evaluates to true. 2811 }; 2812 /// \brief Get the meaning of the noexcept spec on this function, if any. 2813 NoexceptResult getNoexceptSpec(ASTContext &Ctx) const; 2814 unsigned getNumExceptions() const { return NumExceptions; } 2815 QualType getExceptionType(unsigned i) const { 2816 assert(i < NumExceptions && "Invalid exception number!"); 2817 return exception_begin()[i]; 2818 } 2819 Expr *getNoexceptExpr() const { 2820 if (getExceptionSpecType() != EST_ComputedNoexcept) 2821 return 0; 2822 // NoexceptExpr sits where the arguments end. 2823 return *reinterpret_cast<Expr *const *>(arg_type_end()); 2824 } 2825 bool isNothrow(ASTContext &Ctx) const { 2826 ExceptionSpecificationType EST = getExceptionSpecType(); 2827 assert(EST != EST_Delayed); 2828 if (EST == EST_DynamicNone || EST == EST_BasicNoexcept) 2829 return true; 2830 if (EST != EST_ComputedNoexcept) 2831 return false; 2832 return getNoexceptSpec(Ctx) == NR_Nothrow; 2833 } 2834 2835 using FunctionType::isVariadic; 2836 2837 /// \brief Determines whether this function prototype contains a 2838 /// parameter pack at the end. 2839 /// 2840 /// A function template whose last parameter is a parameter pack can be 2841 /// called with an arbitrary number of arguments, much like a variadic 2842 /// function. However, 2843 bool isTemplateVariadic() const; 2844 2845 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 2846 2847 2848 /// \brief Retrieve the ref-qualifier associated with this function type. 2849 RefQualifierKind getRefQualifier() const { 2850 return FunctionType::getRefQualifier(); 2851 } 2852 2853 typedef const QualType *arg_type_iterator; 2854 arg_type_iterator arg_type_begin() const { 2855 return reinterpret_cast<const QualType *>(this+1); 2856 } 2857 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 2858 2859 typedef const QualType *exception_iterator; 2860 exception_iterator exception_begin() const { 2861 // exceptions begin where arguments end 2862 return arg_type_end(); 2863 } 2864 exception_iterator exception_end() const { 2865 if (getExceptionSpecType() != EST_Dynamic) 2866 return exception_begin(); 2867 return exception_begin() + NumExceptions; 2868 } 2869 2870 bool hasAnyConsumedArgs() const { 2871 return HasAnyConsumedArgs; 2872 } 2873 bool isArgConsumed(unsigned I) const { 2874 assert(I < getNumArgs() && "argument index out of range!"); 2875 if (hasAnyConsumedArgs()) 2876 return getConsumedArgsBuffer()[I]; 2877 return false; 2878 } 2879 2880 bool isSugared() const { return false; } 2881 QualType desugar() const { return QualType(this, 0); } 2882 2883 static bool classof(const Type *T) { 2884 return T->getTypeClass() == FunctionProto; 2885 } 2886 static bool classof(const FunctionProtoType *) { return true; } 2887 2888 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx); 2889 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 2890 arg_type_iterator ArgTys, unsigned NumArgs, 2891 const ExtProtoInfo &EPI, const ASTContext &Context); 2892}; 2893 2894 2895/// \brief Represents the dependent type named by a dependently-scoped 2896/// typename using declaration, e.g. 2897/// using typename Base<T>::foo; 2898/// Template instantiation turns these into the underlying type. 2899class UnresolvedUsingType : public Type { 2900 UnresolvedUsingTypenameDecl *Decl; 2901 2902 UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) 2903 : Type(UnresolvedUsing, QualType(), true, true, false, 2904 /*ContainsUnexpandedParameterPack=*/false), 2905 Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} 2906 friend class ASTContext; // ASTContext creates these. 2907public: 2908 2909 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 2910 2911 bool isSugared() const { return false; } 2912 QualType desugar() const { return QualType(this, 0); } 2913 2914 static bool classof(const Type *T) { 2915 return T->getTypeClass() == UnresolvedUsing; 2916 } 2917 static bool classof(const UnresolvedUsingType *) { return true; } 2918 2919 void Profile(llvm::FoldingSetNodeID &ID) { 2920 return Profile(ID, Decl); 2921 } 2922 static void Profile(llvm::FoldingSetNodeID &ID, 2923 UnresolvedUsingTypenameDecl *D) { 2924 ID.AddPointer(D); 2925 } 2926}; 2927 2928 2929class TypedefType : public Type { 2930 TypedefNameDecl *Decl; 2931protected: 2932 TypedefType(TypeClass tc, const TypedefNameDecl *D, QualType can) 2933 : Type(tc, can, can->isDependentType(), 2934 can->isInstantiationDependentType(), 2935 can->isVariablyModifiedType(), 2936 /*ContainsUnexpandedParameterPack=*/false), 2937 Decl(const_cast<TypedefNameDecl*>(D)) { 2938 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2939 } 2940 friend class ASTContext; // ASTContext creates these. 2941public: 2942 2943 TypedefNameDecl *getDecl() const { return Decl; } 2944 2945 bool isSugared() const { return true; } 2946 QualType desugar() const; 2947 2948 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 2949 static bool classof(const TypedefType *) { return true; } 2950}; 2951 2952/// TypeOfExprType (GCC extension). 2953class TypeOfExprType : public Type { 2954 Expr *TOExpr; 2955 2956protected: 2957 TypeOfExprType(Expr *E, QualType can = QualType()); 2958 friend class ASTContext; // ASTContext creates these. 2959public: 2960 Expr *getUnderlyingExpr() const { return TOExpr; } 2961 2962 /// \brief Remove a single level of sugar. 2963 QualType desugar() const; 2964 2965 /// \brief Returns whether this type directly provides sugar. 2966 bool isSugared() const; 2967 2968 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 2969 static bool classof(const TypeOfExprType *) { return true; } 2970}; 2971 2972/// \brief Internal representation of canonical, dependent 2973/// typeof(expr) types. 2974/// 2975/// This class is used internally by the ASTContext to manage 2976/// canonical, dependent types, only. Clients will only see instances 2977/// of this class via TypeOfExprType nodes. 2978class DependentTypeOfExprType 2979 : public TypeOfExprType, public llvm::FoldingSetNode { 2980 const ASTContext &Context; 2981 2982public: 2983 DependentTypeOfExprType(const ASTContext &Context, Expr *E) 2984 : TypeOfExprType(E), Context(Context) { } 2985 2986 void Profile(llvm::FoldingSetNodeID &ID) { 2987 Profile(ID, Context, getUnderlyingExpr()); 2988 } 2989 2990 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2991 Expr *E); 2992}; 2993 2994/// TypeOfType (GCC extension). 2995class TypeOfType : public Type { 2996 QualType TOType; 2997 TypeOfType(QualType T, QualType can) 2998 : Type(TypeOf, can, T->isDependentType(), 2999 T->isInstantiationDependentType(), 3000 T->isVariablyModifiedType(), 3001 T->containsUnexpandedParameterPack()), 3002 TOType(T) { 3003 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 3004 } 3005 friend class ASTContext; // ASTContext creates these. 3006public: 3007 QualType getUnderlyingType() const { return TOType; } 3008 3009 /// \brief Remove a single level of sugar. 3010 QualType desugar() const { return getUnderlyingType(); } 3011 3012 /// \brief Returns whether this type directly provides sugar. 3013 bool isSugared() const { return true; } 3014 3015 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 3016 static bool classof(const TypeOfType *) { return true; } 3017}; 3018 3019/// DecltypeType (C++0x) 3020class DecltypeType : public Type { 3021 Expr *E; 3022 3023 // FIXME: We could get rid of UnderlyingType if we wanted to: We would have to 3024 // Move getDesugaredType to ASTContext so that it can call getDecltypeForExpr 3025 // from it. 3026 QualType UnderlyingType; 3027 3028protected: 3029 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 3030 friend class ASTContext; // ASTContext creates these. 3031public: 3032 Expr *getUnderlyingExpr() const { return E; } 3033 QualType getUnderlyingType() const { return UnderlyingType; } 3034 3035 /// \brief Remove a single level of sugar. 3036 QualType desugar() const; 3037 3038 /// \brief Returns whether this type directly provides sugar. 3039 bool isSugared() const; 3040 3041 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 3042 static bool classof(const DecltypeType *) { return true; } 3043}; 3044 3045/// \brief Internal representation of canonical, dependent 3046/// decltype(expr) types. 3047/// 3048/// This class is used internally by the ASTContext to manage 3049/// canonical, dependent types, only. Clients will only see instances 3050/// of this class via DecltypeType nodes. 3051class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 3052 const ASTContext &Context; 3053 3054public: 3055 DependentDecltypeType(const ASTContext &Context, Expr *E); 3056 3057 void Profile(llvm::FoldingSetNodeID &ID) { 3058 Profile(ID, Context, getUnderlyingExpr()); 3059 } 3060 3061 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 3062 Expr *E); 3063}; 3064 3065/// \brief A unary type transform, which is a type constructed from another 3066class UnaryTransformType : public Type { 3067public: 3068 enum UTTKind { 3069 EnumUnderlyingType 3070 }; 3071 3072private: 3073 /// The untransformed type. 3074 QualType BaseType; 3075 /// The transformed type if not dependent, otherwise the same as BaseType. 3076 QualType UnderlyingType; 3077 3078 UTTKind UKind; 3079protected: 3080 UnaryTransformType(QualType BaseTy, QualType UnderlyingTy, UTTKind UKind, 3081 QualType CanonicalTy); 3082 friend class ASTContext; 3083public: 3084 bool isSugared() const { return !isDependentType(); } 3085 QualType desugar() const { return UnderlyingType; } 3086 3087 QualType getUnderlyingType() const { return UnderlyingType; } 3088 QualType getBaseType() const { return BaseType; } 3089 3090 UTTKind getUTTKind() const { return UKind; } 3091 3092 static bool classof(const Type *T) { 3093 return T->getTypeClass() == UnaryTransform; 3094 } 3095 static bool classof(const UnaryTransformType *) { return true; } 3096}; 3097 3098class TagType : public Type { 3099 /// Stores the TagDecl associated with this type. The decl may point to any 3100 /// TagDecl that declares the entity. 3101 TagDecl * decl; 3102 3103protected: 3104 TagType(TypeClass TC, const TagDecl *D, QualType can); 3105 3106public: 3107 TagDecl *getDecl() const; 3108 3109 /// @brief Determines whether this type is in the process of being 3110 /// defined. 3111 bool isBeingDefined() const; 3112 3113 static bool classof(const Type *T) { 3114 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 3115 } 3116 static bool classof(const TagType *) { return true; } 3117 static bool classof(const RecordType *) { return true; } 3118 static bool classof(const EnumType *) { return true; } 3119}; 3120 3121/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 3122/// to detect TagType objects of structs/unions/classes. 3123class RecordType : public TagType { 3124protected: 3125 explicit RecordType(const RecordDecl *D) 3126 : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3127 explicit RecordType(TypeClass TC, RecordDecl *D) 3128 : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3129 friend class ASTContext; // ASTContext creates these. 3130public: 3131 3132 RecordDecl *getDecl() const { 3133 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 3134 } 3135 3136 // FIXME: This predicate is a helper to QualType/Type. It needs to 3137 // recursively check all fields for const-ness. If any field is declared 3138 // const, it needs to return false. 3139 bool hasConstFields() const { return false; } 3140 3141 bool isSugared() const { return false; } 3142 QualType desugar() const { return QualType(this, 0); } 3143 3144 static bool classof(const TagType *T); 3145 static bool classof(const Type *T) { 3146 return isa<TagType>(T) && classof(cast<TagType>(T)); 3147 } 3148 static bool classof(const RecordType *) { return true; } 3149}; 3150 3151/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 3152/// to detect TagType objects of enums. 3153class EnumType : public TagType { 3154 explicit EnumType(const EnumDecl *D) 3155 : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3156 friend class ASTContext; // ASTContext creates these. 3157public: 3158 3159 EnumDecl *getDecl() const { 3160 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 3161 } 3162 3163 bool isSugared() const { return false; } 3164 QualType desugar() const { return QualType(this, 0); } 3165 3166 static bool classof(const TagType *T); 3167 static bool classof(const Type *T) { 3168 return isa<TagType>(T) && classof(cast<TagType>(T)); 3169 } 3170 static bool classof(const EnumType *) { return true; } 3171}; 3172 3173/// AttributedType - An attributed type is a type to which a type 3174/// attribute has been applied. The "modified type" is the 3175/// fully-sugared type to which the attributed type was applied; 3176/// generally it is not canonically equivalent to the attributed type. 3177/// The "equivalent type" is the minimally-desugared type which the 3178/// type is canonically equivalent to. 3179/// 3180/// For example, in the following attributed type: 3181/// int32_t __attribute__((vector_size(16))) 3182/// - the modified type is the TypedefType for int32_t 3183/// - the equivalent type is VectorType(16, int32_t) 3184/// - the canonical type is VectorType(16, int) 3185class AttributedType : public Type, public llvm::FoldingSetNode { 3186public: 3187 // It is really silly to have yet another attribute-kind enum, but 3188 // clang::attr::Kind doesn't currently cover the pure type attrs. 3189 enum Kind { 3190 // Expression operand. 3191 attr_address_space, 3192 attr_regparm, 3193 attr_vector_size, 3194 attr_neon_vector_type, 3195 attr_neon_polyvector_type, 3196 3197 FirstExprOperandKind = attr_address_space, 3198 LastExprOperandKind = attr_neon_polyvector_type, 3199 3200 // Enumerated operand (string or keyword). 3201 attr_objc_gc, 3202 attr_objc_ownership, 3203 attr_pcs, 3204 3205 FirstEnumOperandKind = attr_objc_gc, 3206 LastEnumOperandKind = attr_pcs, 3207 3208 // No operand. 3209 attr_noreturn, 3210 attr_cdecl, 3211 attr_fastcall, 3212 attr_stdcall, 3213 attr_thiscall, 3214 attr_pascal 3215 }; 3216 3217private: 3218 QualType ModifiedType; 3219 QualType EquivalentType; 3220 3221 friend class ASTContext; // creates these 3222 3223 AttributedType(QualType canon, Kind attrKind, 3224 QualType modified, QualType equivalent) 3225 : Type(Attributed, canon, canon->isDependentType(), 3226 canon->isInstantiationDependentType(), 3227 canon->isVariablyModifiedType(), 3228 canon->containsUnexpandedParameterPack()), 3229 ModifiedType(modified), EquivalentType(equivalent) { 3230 AttributedTypeBits.AttrKind = attrKind; 3231 } 3232 3233public: 3234 Kind getAttrKind() const { 3235 return static_cast<Kind>(AttributedTypeBits.AttrKind); 3236 } 3237 3238 QualType getModifiedType() const { return ModifiedType; } 3239 QualType getEquivalentType() const { return EquivalentType; } 3240 3241 bool isSugared() const { return true; } 3242 QualType desugar() const { return getEquivalentType(); } 3243 3244 void Profile(llvm::FoldingSetNodeID &ID) { 3245 Profile(ID, getAttrKind(), ModifiedType, EquivalentType); 3246 } 3247 3248 static void Profile(llvm::FoldingSetNodeID &ID, Kind attrKind, 3249 QualType modified, QualType equivalent) { 3250 ID.AddInteger(attrKind); 3251 ID.AddPointer(modified.getAsOpaquePtr()); 3252 ID.AddPointer(equivalent.getAsOpaquePtr()); 3253 } 3254 3255 static bool classof(const Type *T) { 3256 return T->getTypeClass() == Attributed; 3257 } 3258 static bool classof(const AttributedType *T) { return true; } 3259}; 3260 3261class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 3262 // Helper data collector for canonical types. 3263 struct CanonicalTTPTInfo { 3264 unsigned Depth : 15; 3265 unsigned ParameterPack : 1; 3266 unsigned Index : 16; 3267 }; 3268 3269 union { 3270 // Info for the canonical type. 3271 CanonicalTTPTInfo CanTTPTInfo; 3272 // Info for the non-canonical type. 3273 TemplateTypeParmDecl *TTPDecl; 3274 }; 3275 3276 /// Build a non-canonical type. 3277 TemplateTypeParmType(TemplateTypeParmDecl *TTPDecl, QualType Canon) 3278 : Type(TemplateTypeParm, Canon, /*Dependent=*/true, 3279 /*InstantiationDependent=*/true, 3280 /*VariablyModified=*/false, 3281 Canon->containsUnexpandedParameterPack()), 3282 TTPDecl(TTPDecl) { } 3283 3284 /// Build the canonical type. 3285 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 3286 : Type(TemplateTypeParm, QualType(this, 0), 3287 /*Dependent=*/true, 3288 /*InstantiationDependent=*/true, 3289 /*VariablyModified=*/false, PP) { 3290 CanTTPTInfo.Depth = D; 3291 CanTTPTInfo.Index = I; 3292 CanTTPTInfo.ParameterPack = PP; 3293 } 3294 3295 friend class ASTContext; // ASTContext creates these 3296 3297 const CanonicalTTPTInfo& getCanTTPTInfo() const { 3298 QualType Can = getCanonicalTypeInternal(); 3299 return Can->castAs<TemplateTypeParmType>()->CanTTPTInfo; 3300 } 3301 3302public: 3303 unsigned getDepth() const { return getCanTTPTInfo().Depth; } 3304 unsigned getIndex() const { return getCanTTPTInfo().Index; } 3305 bool isParameterPack() const { return getCanTTPTInfo().ParameterPack; } 3306 3307 TemplateTypeParmDecl *getDecl() const { 3308 return isCanonicalUnqualified() ? 0 : TTPDecl; 3309 } 3310 3311 IdentifierInfo *getIdentifier() const; 3312 3313 bool isSugared() const { return false; } 3314 QualType desugar() const { return QualType(this, 0); } 3315 3316 void Profile(llvm::FoldingSetNodeID &ID) { 3317 Profile(ID, getDepth(), getIndex(), isParameterPack(), getDecl()); 3318 } 3319 3320 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 3321 unsigned Index, bool ParameterPack, 3322 TemplateTypeParmDecl *TTPDecl) { 3323 ID.AddInteger(Depth); 3324 ID.AddInteger(Index); 3325 ID.AddBoolean(ParameterPack); 3326 ID.AddPointer(TTPDecl); 3327 } 3328 3329 static bool classof(const Type *T) { 3330 return T->getTypeClass() == TemplateTypeParm; 3331 } 3332 static bool classof(const TemplateTypeParmType *T) { return true; } 3333}; 3334 3335/// \brief Represents the result of substituting a type for a template 3336/// type parameter. 3337/// 3338/// Within an instantiated template, all template type parameters have 3339/// been replaced with these. They are used solely to record that a 3340/// type was originally written as a template type parameter; 3341/// therefore they are never canonical. 3342class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 3343 // The original type parameter. 3344 const TemplateTypeParmType *Replaced; 3345 3346 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 3347 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType(), 3348 Canon->isInstantiationDependentType(), 3349 Canon->isVariablyModifiedType(), 3350 Canon->containsUnexpandedParameterPack()), 3351 Replaced(Param) { } 3352 3353 friend class ASTContext; 3354 3355public: 3356 /// Gets the template parameter that was substituted for. 3357 const TemplateTypeParmType *getReplacedParameter() const { 3358 return Replaced; 3359 } 3360 3361 /// Gets the type that was substituted for the template 3362 /// parameter. 3363 QualType getReplacementType() const { 3364 return getCanonicalTypeInternal(); 3365 } 3366 3367 bool isSugared() const { return true; } 3368 QualType desugar() const { return getReplacementType(); } 3369 3370 void Profile(llvm::FoldingSetNodeID &ID) { 3371 Profile(ID, getReplacedParameter(), getReplacementType()); 3372 } 3373 static void Profile(llvm::FoldingSetNodeID &ID, 3374 const TemplateTypeParmType *Replaced, 3375 QualType Replacement) { 3376 ID.AddPointer(Replaced); 3377 ID.AddPointer(Replacement.getAsOpaquePtr()); 3378 } 3379 3380 static bool classof(const Type *T) { 3381 return T->getTypeClass() == SubstTemplateTypeParm; 3382 } 3383 static bool classof(const SubstTemplateTypeParmType *T) { return true; } 3384}; 3385 3386/// \brief Represents the result of substituting a set of types for a template 3387/// type parameter pack. 3388/// 3389/// When a pack expansion in the source code contains multiple parameter packs 3390/// and those parameter packs correspond to different levels of template 3391/// parameter lists, this type node is used to represent a template type 3392/// parameter pack from an outer level, which has already had its argument pack 3393/// substituted but that still lives within a pack expansion that itself 3394/// could not be instantiated. When actually performing a substitution into 3395/// that pack expansion (e.g., when all template parameters have corresponding 3396/// arguments), this type will be replaced with the \c SubstTemplateTypeParmType 3397/// at the current pack substitution index. 3398class SubstTemplateTypeParmPackType : public Type, public llvm::FoldingSetNode { 3399 /// \brief The original type parameter. 3400 const TemplateTypeParmType *Replaced; 3401 3402 /// \brief A pointer to the set of template arguments that this 3403 /// parameter pack is instantiated with. 3404 const TemplateArgument *Arguments; 3405 3406 /// \brief The number of template arguments in \c Arguments. 3407 unsigned NumArguments; 3408 3409 SubstTemplateTypeParmPackType(const TemplateTypeParmType *Param, 3410 QualType Canon, 3411 const TemplateArgument &ArgPack); 3412 3413 friend class ASTContext; 3414 3415public: 3416 IdentifierInfo *getIdentifier() const { return Replaced->getIdentifier(); } 3417 3418 /// Gets the template parameter that was substituted for. 3419 const TemplateTypeParmType *getReplacedParameter() const { 3420 return Replaced; 3421 } 3422 3423 bool isSugared() const { return false; } 3424 QualType desugar() const { return QualType(this, 0); } 3425 3426 TemplateArgument getArgumentPack() const; 3427 3428 void Profile(llvm::FoldingSetNodeID &ID); 3429 static void Profile(llvm::FoldingSetNodeID &ID, 3430 const TemplateTypeParmType *Replaced, 3431 const TemplateArgument &ArgPack); 3432 3433 static bool classof(const Type *T) { 3434 return T->getTypeClass() == SubstTemplateTypeParmPack; 3435 } 3436 static bool classof(const SubstTemplateTypeParmPackType *T) { return true; } 3437}; 3438 3439/// \brief Represents a C++0x auto type. 3440/// 3441/// These types are usually a placeholder for a deduced type. However, within 3442/// templates and before the initializer is attached, there is no deduced type 3443/// and an auto type is type-dependent and canonical. 3444class AutoType : public Type, public llvm::FoldingSetNode { 3445 AutoType(QualType DeducedType) 3446 : Type(Auto, DeducedType.isNull() ? QualType(this, 0) : DeducedType, 3447 /*Dependent=*/DeducedType.isNull(), 3448 /*InstantiationDependent=*/DeducedType.isNull(), 3449 /*VariablyModified=*/false, /*ContainsParameterPack=*/false) { 3450 assert((DeducedType.isNull() || !DeducedType->isDependentType()) && 3451 "deduced a dependent type for auto"); 3452 } 3453 3454 friend class ASTContext; // ASTContext creates these 3455 3456public: 3457 bool isSugared() const { return isDeduced(); } 3458 QualType desugar() const { return getCanonicalTypeInternal(); } 3459 3460 QualType getDeducedType() const { 3461 return isDeduced() ? getCanonicalTypeInternal() : QualType(); 3462 } 3463 bool isDeduced() const { 3464 return !isDependentType(); 3465 } 3466 3467 void Profile(llvm::FoldingSetNodeID &ID) { 3468 Profile(ID, getDeducedType()); 3469 } 3470 3471 static void Profile(llvm::FoldingSetNodeID &ID, 3472 QualType Deduced) { 3473 ID.AddPointer(Deduced.getAsOpaquePtr()); 3474 } 3475 3476 static bool classof(const Type *T) { 3477 return T->getTypeClass() == Auto; 3478 } 3479 static bool classof(const AutoType *T) { return true; } 3480}; 3481 3482/// \brief Represents a type template specialization; the template 3483/// must be a class template, a type alias template, or a template 3484/// template parameter. A template which cannot be resolved to one of 3485/// these, e.g. because it is written with a dependent scope 3486/// specifier, is instead represented as a 3487/// @c DependentTemplateSpecializationType. 3488/// 3489/// A non-dependent template specialization type is always "sugar", 3490/// typically for a @c RecordType. For example, a class template 3491/// specialization type of @c vector<int> will refer to a tag type for 3492/// the instantiation @c std::vector<int, std::allocator<int>> 3493/// 3494/// Template specializations are dependent if either the template or 3495/// any of the template arguments are dependent, in which case the 3496/// type may also be canonical. 3497/// 3498/// Instances of this type are allocated with a trailing array of 3499/// TemplateArguments, followed by a QualType representing the 3500/// non-canonical aliased type when the template is a type alias 3501/// template. 3502class TemplateSpecializationType 3503 : public Type, public llvm::FoldingSetNode { 3504 /// \brief The name of the template being specialized. This is 3505 /// either a TemplateName::Template (in which case it is a 3506 /// ClassTemplateDecl*, a TemplateTemplateParmDecl*, or a 3507 /// TypeAliasTemplateDecl*), a 3508 /// TemplateName::SubstTemplateTemplateParmPack, or a 3509 /// TemplateName::SubstTemplateTemplateParm (in which case the 3510 /// replacement must, recursively, be one of these). 3511 TemplateName Template; 3512 3513 /// \brief - The number of template arguments named in this class 3514 /// template specialization. 3515 unsigned NumArgs; 3516 3517 TemplateSpecializationType(TemplateName T, 3518 const TemplateArgument *Args, 3519 unsigned NumArgs, QualType Canon, 3520 QualType Aliased); 3521 3522 friend class ASTContext; // ASTContext creates these 3523 3524public: 3525 /// \brief Determine whether any of the given template arguments are 3526 /// dependent. 3527 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 3528 unsigned NumArgs, 3529 bool &InstantiationDependent); 3530 3531 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 3532 unsigned NumArgs, 3533 bool &InstantiationDependent); 3534 3535 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &, 3536 bool &InstantiationDependent); 3537 3538 /// \brief Print a template argument list, including the '<' and '>' 3539 /// enclosing the template arguments. 3540 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 3541 unsigned NumArgs, 3542 const PrintingPolicy &Policy, 3543 bool SkipBrackets = false); 3544 3545 static std::string PrintTemplateArgumentList(const TemplateArgumentLoc *Args, 3546 unsigned NumArgs, 3547 const PrintingPolicy &Policy); 3548 3549 static std::string PrintTemplateArgumentList(const TemplateArgumentListInfo &, 3550 const PrintingPolicy &Policy); 3551 3552 /// True if this template specialization type matches a current 3553 /// instantiation in the context in which it is found. 3554 bool isCurrentInstantiation() const { 3555 return isa<InjectedClassNameType>(getCanonicalTypeInternal()); 3556 } 3557 3558 /// True if this template specialization type is for a type alias 3559 /// template. 3560 bool isTypeAlias() const; 3561 /// Get the aliased type, if this is a specialization of a type alias 3562 /// template. 3563 QualType getAliasedType() const { 3564 assert(isTypeAlias() && "not a type alias template specialization"); 3565 return *reinterpret_cast<const QualType*>(end()); 3566 } 3567 3568 typedef const TemplateArgument * iterator; 3569 3570 iterator begin() const { return getArgs(); } 3571 iterator end() const; // defined inline in TemplateBase.h 3572 3573 /// \brief Retrieve the name of the template that we are specializing. 3574 TemplateName getTemplateName() const { return Template; } 3575 3576 /// \brief Retrieve the template arguments. 3577 const TemplateArgument *getArgs() const { 3578 return reinterpret_cast<const TemplateArgument *>(this + 1); 3579 } 3580 3581 /// \brief Retrieve the number of template arguments. 3582 unsigned getNumArgs() const { return NumArgs; } 3583 3584 /// \brief Retrieve a specific template argument as a type. 3585 /// \precondition @c isArgType(Arg) 3586 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 3587 3588 bool isSugared() const { 3589 return !isDependentType() || isCurrentInstantiation() || isTypeAlias(); 3590 } 3591 QualType desugar() const { return getCanonicalTypeInternal(); } 3592 3593 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) { 3594 Profile(ID, Template, getArgs(), NumArgs, Ctx); 3595 if (isTypeAlias()) 3596 getAliasedType().Profile(ID); 3597 } 3598 3599 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 3600 const TemplateArgument *Args, 3601 unsigned NumArgs, 3602 const ASTContext &Context); 3603 3604 static bool classof(const Type *T) { 3605 return T->getTypeClass() == TemplateSpecialization; 3606 } 3607 static bool classof(const TemplateSpecializationType *T) { return true; } 3608}; 3609 3610/// \brief The injected class name of a C++ class template or class 3611/// template partial specialization. Used to record that a type was 3612/// spelled with a bare identifier rather than as a template-id; the 3613/// equivalent for non-templated classes is just RecordType. 3614/// 3615/// Injected class name types are always dependent. Template 3616/// instantiation turns these into RecordTypes. 3617/// 3618/// Injected class name types are always canonical. This works 3619/// because it is impossible to compare an injected class name type 3620/// with the corresponding non-injected template type, for the same 3621/// reason that it is impossible to directly compare template 3622/// parameters from different dependent contexts: injected class name 3623/// types can only occur within the scope of a particular templated 3624/// declaration, and within that scope every template specialization 3625/// will canonicalize to the injected class name (when appropriate 3626/// according to the rules of the language). 3627class InjectedClassNameType : public Type { 3628 CXXRecordDecl *Decl; 3629 3630 /// The template specialization which this type represents. 3631 /// For example, in 3632 /// template <class T> class A { ... }; 3633 /// this is A<T>, whereas in 3634 /// template <class X, class Y> class A<B<X,Y> > { ... }; 3635 /// this is A<B<X,Y> >. 3636 /// 3637 /// It is always unqualified, always a template specialization type, 3638 /// and always dependent. 3639 QualType InjectedType; 3640 3641 friend class ASTContext; // ASTContext creates these. 3642 friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not 3643 // currently suitable for AST reading, too much 3644 // interdependencies. 3645 InjectedClassNameType(CXXRecordDecl *D, QualType TST) 3646 : Type(InjectedClassName, QualType(), /*Dependent=*/true, 3647 /*InstantiationDependent=*/true, 3648 /*VariablyModified=*/false, 3649 /*ContainsUnexpandedParameterPack=*/false), 3650 Decl(D), InjectedType(TST) { 3651 assert(isa<TemplateSpecializationType>(TST)); 3652 assert(!TST.hasQualifiers()); 3653 assert(TST->isDependentType()); 3654 } 3655 3656public: 3657 QualType getInjectedSpecializationType() const { return InjectedType; } 3658 const TemplateSpecializationType *getInjectedTST() const { 3659 return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); 3660 } 3661 3662 CXXRecordDecl *getDecl() const; 3663 3664 bool isSugared() const { return false; } 3665 QualType desugar() const { return QualType(this, 0); } 3666 3667 static bool classof(const Type *T) { 3668 return T->getTypeClass() == InjectedClassName; 3669 } 3670 static bool classof(const InjectedClassNameType *T) { return true; } 3671}; 3672 3673/// \brief The kind of a tag type. 3674enum TagTypeKind { 3675 /// \brief The "struct" keyword. 3676 TTK_Struct, 3677 /// \brief The "union" keyword. 3678 TTK_Union, 3679 /// \brief The "class" keyword. 3680 TTK_Class, 3681 /// \brief The "enum" keyword. 3682 TTK_Enum 3683}; 3684 3685/// \brief The elaboration keyword that precedes a qualified type name or 3686/// introduces an elaborated-type-specifier. 3687enum ElaboratedTypeKeyword { 3688 /// \brief The "struct" keyword introduces the elaborated-type-specifier. 3689 ETK_Struct, 3690 /// \brief The "union" keyword introduces the elaborated-type-specifier. 3691 ETK_Union, 3692 /// \brief The "class" keyword introduces the elaborated-type-specifier. 3693 ETK_Class, 3694 /// \brief The "enum" keyword introduces the elaborated-type-specifier. 3695 ETK_Enum, 3696 /// \brief The "typename" keyword precedes the qualified type name, e.g., 3697 /// \c typename T::type. 3698 ETK_Typename, 3699 /// \brief No keyword precedes the qualified type name. 3700 ETK_None 3701}; 3702 3703/// A helper class for Type nodes having an ElaboratedTypeKeyword. 3704/// The keyword in stored in the free bits of the base class. 3705/// Also provides a few static helpers for converting and printing 3706/// elaborated type keyword and tag type kind enumerations. 3707class TypeWithKeyword : public Type { 3708protected: 3709 TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, 3710 QualType Canonical, bool Dependent, 3711 bool InstantiationDependent, bool VariablyModified, 3712 bool ContainsUnexpandedParameterPack) 3713 : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified, 3714 ContainsUnexpandedParameterPack) { 3715 TypeWithKeywordBits.Keyword = Keyword; 3716 } 3717 3718public: 3719 ElaboratedTypeKeyword getKeyword() const { 3720 return static_cast<ElaboratedTypeKeyword>(TypeWithKeywordBits.Keyword); 3721 } 3722 3723 /// getKeywordForTypeSpec - Converts a type specifier (DeclSpec::TST) 3724 /// into an elaborated type keyword. 3725 static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); 3726 3727 /// getTagTypeKindForTypeSpec - Converts a type specifier (DeclSpec::TST) 3728 /// into a tag type kind. It is an error to provide a type specifier 3729 /// which *isn't* a tag kind here. 3730 static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); 3731 3732 /// getKeywordForTagDeclKind - Converts a TagTypeKind into an 3733 /// elaborated type keyword. 3734 static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); 3735 3736 /// getTagTypeKindForKeyword - Converts an elaborated type keyword into 3737 // a TagTypeKind. It is an error to provide an elaborated type keyword 3738 /// which *isn't* a tag kind here. 3739 static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); 3740 3741 static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); 3742 3743 static const char *getKeywordName(ElaboratedTypeKeyword Keyword); 3744 3745 static const char *getTagTypeKindName(TagTypeKind Kind) { 3746 return getKeywordName(getKeywordForTagTypeKind(Kind)); 3747 } 3748 3749 class CannotCastToThisType {}; 3750 static CannotCastToThisType classof(const Type *); 3751}; 3752 3753/// \brief Represents a type that was referred to using an elaborated type 3754/// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, 3755/// or both. 3756/// 3757/// This type is used to keep track of a type name as written in the 3758/// source code, including tag keywords and any nested-name-specifiers. 3759/// The type itself is always "sugar", used to express what was written 3760/// in the source code but containing no additional semantic information. 3761class ElaboratedType : public TypeWithKeyword, public llvm::FoldingSetNode { 3762 3763 /// \brief The nested name specifier containing the qualifier. 3764 NestedNameSpecifier *NNS; 3765 3766 /// \brief The type that this qualified name refers to. 3767 QualType NamedType; 3768 3769 ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3770 QualType NamedType, QualType CanonType) 3771 : TypeWithKeyword(Keyword, Elaborated, CanonType, 3772 NamedType->isDependentType(), 3773 NamedType->isInstantiationDependentType(), 3774 NamedType->isVariablyModifiedType(), 3775 NamedType->containsUnexpandedParameterPack()), 3776 NNS(NNS), NamedType(NamedType) { 3777 assert(!(Keyword == ETK_None && NNS == 0) && 3778 "ElaboratedType cannot have elaborated type keyword " 3779 "and name qualifier both null."); 3780 } 3781 3782 friend class ASTContext; // ASTContext creates these 3783 3784public: 3785 ~ElaboratedType(); 3786 3787 /// \brief Retrieve the qualification on this type. 3788 NestedNameSpecifier *getQualifier() const { return NNS; } 3789 3790 /// \brief Retrieve the type named by the qualified-id. 3791 QualType getNamedType() const { return NamedType; } 3792 3793 /// \brief Remove a single level of sugar. 3794 QualType desugar() const { return getNamedType(); } 3795 3796 /// \brief Returns whether this type directly provides sugar. 3797 bool isSugared() const { return true; } 3798 3799 void Profile(llvm::FoldingSetNodeID &ID) { 3800 Profile(ID, getKeyword(), NNS, NamedType); 3801 } 3802 3803 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3804 NestedNameSpecifier *NNS, QualType NamedType) { 3805 ID.AddInteger(Keyword); 3806 ID.AddPointer(NNS); 3807 NamedType.Profile(ID); 3808 } 3809 3810 static bool classof(const Type *T) { 3811 return T->getTypeClass() == Elaborated; 3812 } 3813 static bool classof(const ElaboratedType *T) { return true; } 3814}; 3815 3816/// \brief Represents a qualified type name for which the type name is 3817/// dependent. 3818/// 3819/// DependentNameType represents a class of dependent types that involve a 3820/// dependent nested-name-specifier (e.g., "T::") followed by a (dependent) 3821/// name of a type. The DependentNameType may start with a "typename" (for a 3822/// typename-specifier), "class", "struct", "union", or "enum" (for a 3823/// dependent elaborated-type-specifier), or nothing (in contexts where we 3824/// know that we must be referring to a type, e.g., in a base class specifier). 3825class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { 3826 3827 /// \brief The nested name specifier containing the qualifier. 3828 NestedNameSpecifier *NNS; 3829 3830 /// \brief The type that this typename specifier refers to. 3831 const IdentifierInfo *Name; 3832 3833 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3834 const IdentifierInfo *Name, QualType CanonType) 3835 : TypeWithKeyword(Keyword, DependentName, CanonType, /*Dependent=*/true, 3836 /*InstantiationDependent=*/true, 3837 /*VariablyModified=*/false, 3838 NNS->containsUnexpandedParameterPack()), 3839 NNS(NNS), Name(Name) { 3840 assert(NNS->isDependent() && 3841 "DependentNameType requires a dependent nested-name-specifier"); 3842 } 3843 3844 friend class ASTContext; // ASTContext creates these 3845 3846public: 3847 /// \brief Retrieve the qualification on this type. 3848 NestedNameSpecifier *getQualifier() const { return NNS; } 3849 3850 /// \brief Retrieve the type named by the typename specifier as an 3851 /// identifier. 3852 /// 3853 /// This routine will return a non-NULL identifier pointer when the 3854 /// form of the original typename was terminated by an identifier, 3855 /// e.g., "typename T::type". 3856 const IdentifierInfo *getIdentifier() const { 3857 return Name; 3858 } 3859 3860 bool isSugared() const { return false; } 3861 QualType desugar() const { return QualType(this, 0); } 3862 3863 void Profile(llvm::FoldingSetNodeID &ID) { 3864 Profile(ID, getKeyword(), NNS, Name); 3865 } 3866 3867 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3868 NestedNameSpecifier *NNS, const IdentifierInfo *Name) { 3869 ID.AddInteger(Keyword); 3870 ID.AddPointer(NNS); 3871 ID.AddPointer(Name); 3872 } 3873 3874 static bool classof(const Type *T) { 3875 return T->getTypeClass() == DependentName; 3876 } 3877 static bool classof(const DependentNameType *T) { return true; } 3878}; 3879 3880/// DependentTemplateSpecializationType - Represents a template 3881/// specialization type whose template cannot be resolved, e.g. 3882/// A<T>::template B<T> 3883class DependentTemplateSpecializationType : 3884 public TypeWithKeyword, public llvm::FoldingSetNode { 3885 3886 /// \brief The nested name specifier containing the qualifier. 3887 NestedNameSpecifier *NNS; 3888 3889 /// \brief The identifier of the template. 3890 const IdentifierInfo *Name; 3891 3892 /// \brief - The number of template arguments named in this class 3893 /// template specialization. 3894 unsigned NumArgs; 3895 3896 const TemplateArgument *getArgBuffer() const { 3897 return reinterpret_cast<const TemplateArgument*>(this+1); 3898 } 3899 TemplateArgument *getArgBuffer() { 3900 return reinterpret_cast<TemplateArgument*>(this+1); 3901 } 3902 3903 DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 3904 NestedNameSpecifier *NNS, 3905 const IdentifierInfo *Name, 3906 unsigned NumArgs, 3907 const TemplateArgument *Args, 3908 QualType Canon); 3909 3910 friend class ASTContext; // ASTContext creates these 3911 3912public: 3913 NestedNameSpecifier *getQualifier() const { return NNS; } 3914 const IdentifierInfo *getIdentifier() const { return Name; } 3915 3916 /// \brief Retrieve the template arguments. 3917 const TemplateArgument *getArgs() const { 3918 return getArgBuffer(); 3919 } 3920 3921 /// \brief Retrieve the number of template arguments. 3922 unsigned getNumArgs() const { return NumArgs; } 3923 3924 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 3925 3926 typedef const TemplateArgument * iterator; 3927 iterator begin() const { return getArgs(); } 3928 iterator end() const; // inline in TemplateBase.h 3929 3930 bool isSugared() const { return false; } 3931 QualType desugar() const { return QualType(this, 0); } 3932 3933 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) { 3934 Profile(ID, Context, getKeyword(), NNS, Name, NumArgs, getArgs()); 3935 } 3936 3937 static void Profile(llvm::FoldingSetNodeID &ID, 3938 const ASTContext &Context, 3939 ElaboratedTypeKeyword Keyword, 3940 NestedNameSpecifier *Qualifier, 3941 const IdentifierInfo *Name, 3942 unsigned NumArgs, 3943 const TemplateArgument *Args); 3944 3945 static bool classof(const Type *T) { 3946 return T->getTypeClass() == DependentTemplateSpecialization; 3947 } 3948 static bool classof(const DependentTemplateSpecializationType *T) { 3949 return true; 3950 } 3951}; 3952 3953/// \brief Represents a pack expansion of types. 3954/// 3955/// Pack expansions are part of C++0x variadic templates. A pack 3956/// expansion contains a pattern, which itself contains one or more 3957/// "unexpanded" parameter packs. When instantiated, a pack expansion 3958/// produces a series of types, each instantiated from the pattern of 3959/// the expansion, where the Ith instantiation of the pattern uses the 3960/// Ith arguments bound to each of the unexpanded parameter packs. The 3961/// pack expansion is considered to "expand" these unexpanded 3962/// parameter packs. 3963/// 3964/// \code 3965/// template<typename ...Types> struct tuple; 3966/// 3967/// template<typename ...Types> 3968/// struct tuple_of_references { 3969/// typedef tuple<Types&...> type; 3970/// }; 3971/// \endcode 3972/// 3973/// Here, the pack expansion \c Types&... is represented via a 3974/// PackExpansionType whose pattern is Types&. 3975class PackExpansionType : public Type, public llvm::FoldingSetNode { 3976 /// \brief The pattern of the pack expansion. 3977 QualType Pattern; 3978 3979 /// \brief The number of expansions that this pack expansion will 3980 /// generate when substituted (+1), or indicates that 3981 /// 3982 /// This field will only have a non-zero value when some of the parameter 3983 /// packs that occur within the pattern have been substituted but others have 3984 /// not. 3985 unsigned NumExpansions; 3986 3987 PackExpansionType(QualType Pattern, QualType Canon, 3988 llvm::Optional<unsigned> NumExpansions) 3989 : Type(PackExpansion, Canon, /*Dependent=*/true, 3990 /*InstantiationDependent=*/true, 3991 /*VariableModified=*/Pattern->isVariablyModifiedType(), 3992 /*ContainsUnexpandedParameterPack=*/false), 3993 Pattern(Pattern), 3994 NumExpansions(NumExpansions? *NumExpansions + 1: 0) { } 3995 3996 friend class ASTContext; // ASTContext creates these 3997 3998public: 3999 /// \brief Retrieve the pattern of this pack expansion, which is the 4000 /// type that will be repeatedly instantiated when instantiating the 4001 /// pack expansion itself. 4002 QualType getPattern() const { return Pattern; } 4003 4004 /// \brief Retrieve the number of expansions that this pack expansion will 4005 /// generate, if known. 4006 llvm::Optional<unsigned> getNumExpansions() const { 4007 if (NumExpansions) 4008 return NumExpansions - 1; 4009 4010 return llvm::Optional<unsigned>(); 4011 } 4012 4013 bool isSugared() const { return false; } 4014 QualType desugar() const { return QualType(this, 0); } 4015 4016 void Profile(llvm::FoldingSetNodeID &ID) { 4017 Profile(ID, getPattern(), getNumExpansions()); 4018 } 4019 4020 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pattern, 4021 llvm::Optional<unsigned> NumExpansions) { 4022 ID.AddPointer(Pattern.getAsOpaquePtr()); 4023 ID.AddBoolean(NumExpansions); 4024 if (NumExpansions) 4025 ID.AddInteger(*NumExpansions); 4026 } 4027 4028 static bool classof(const Type *T) { 4029 return T->getTypeClass() == PackExpansion; 4030 } 4031 static bool classof(const PackExpansionType *T) { 4032 return true; 4033 } 4034}; 4035 4036/// ObjCObjectType - Represents a class type in Objective C. 4037/// Every Objective C type is a combination of a base type and a 4038/// list of protocols. 4039/// 4040/// Given the following declarations: 4041/// @class C; 4042/// @protocol P; 4043/// 4044/// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType 4045/// with base C and no protocols. 4046/// 4047/// 'C<P>' is an ObjCObjectType with base C and protocol list [P]. 4048/// 4049/// 'id' is a TypedefType which is sugar for an ObjCPointerType whose 4050/// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType 4051/// and no protocols. 4052/// 4053/// 'id<P>' is an ObjCPointerType whose pointee is an ObjCObjecType 4054/// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually 4055/// this should get its own sugar class to better represent the source. 4056class ObjCObjectType : public Type { 4057 // ObjCObjectType.NumProtocols - the number of protocols stored 4058 // after the ObjCObjectPointerType node. 4059 // 4060 // These protocols are those written directly on the type. If 4061 // protocol qualifiers ever become additive, the iterators will need 4062 // to get kindof complicated. 4063 // 4064 // In the canonical object type, these are sorted alphabetically 4065 // and uniqued. 4066 4067 /// Either a BuiltinType or an InterfaceType or sugar for either. 4068 QualType BaseType; 4069 4070 ObjCProtocolDecl * const *getProtocolStorage() const { 4071 return const_cast<ObjCObjectType*>(this)->getProtocolStorage(); 4072 } 4073 4074 ObjCProtocolDecl **getProtocolStorage(); 4075 4076protected: 4077 ObjCObjectType(QualType Canonical, QualType Base, 4078 ObjCProtocolDecl * const *Protocols, unsigned NumProtocols); 4079 4080 enum Nonce_ObjCInterface { Nonce_ObjCInterface }; 4081 ObjCObjectType(enum Nonce_ObjCInterface) 4082 : Type(ObjCInterface, QualType(), false, false, false, false), 4083 BaseType(QualType(this_(), 0)) { 4084 ObjCObjectTypeBits.NumProtocols = 0; 4085 } 4086 4087public: 4088 /// getBaseType - Gets the base type of this object type. This is 4089 /// always (possibly sugar for) one of: 4090 /// - the 'id' builtin type (as opposed to the 'id' type visible to the 4091 /// user, which is a typedef for an ObjCPointerType) 4092 /// - the 'Class' builtin type (same caveat) 4093 /// - an ObjCObjectType (currently always an ObjCInterfaceType) 4094 QualType getBaseType() const { return BaseType; } 4095 4096 bool isObjCId() const { 4097 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); 4098 } 4099 bool isObjCClass() const { 4100 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); 4101 } 4102 bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } 4103 bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } 4104 bool isObjCUnqualifiedIdOrClass() const { 4105 if (!qual_empty()) return false; 4106 if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) 4107 return T->getKind() == BuiltinType::ObjCId || 4108 T->getKind() == BuiltinType::ObjCClass; 4109 return false; 4110 } 4111 bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } 4112 bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } 4113 4114 /// Gets the interface declaration for this object type, if the base type 4115 /// really is an interface. 4116 ObjCInterfaceDecl *getInterface() const; 4117 4118 typedef ObjCProtocolDecl * const *qual_iterator; 4119 4120 qual_iterator qual_begin() const { return getProtocolStorage(); } 4121 qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } 4122 4123 bool qual_empty() const { return getNumProtocols() == 0; } 4124 4125 /// getNumProtocols - Return the number of qualifying protocols in this 4126 /// interface type, or 0 if there are none. 4127 unsigned getNumProtocols() const { return ObjCObjectTypeBits.NumProtocols; } 4128 4129 /// \brief Fetch a protocol by index. 4130 ObjCProtocolDecl *getProtocol(unsigned I) const { 4131 assert(I < getNumProtocols() && "Out-of-range protocol access"); 4132 return qual_begin()[I]; 4133 } 4134 4135 bool isSugared() const { return false; } 4136 QualType desugar() const { return QualType(this, 0); } 4137 4138 static bool classof(const Type *T) { 4139 return T->getTypeClass() == ObjCObject || 4140 T->getTypeClass() == ObjCInterface; 4141 } 4142 static bool classof(const ObjCObjectType *) { return true; } 4143}; 4144 4145/// ObjCObjectTypeImpl - A class providing a concrete implementation 4146/// of ObjCObjectType, so as to not increase the footprint of 4147/// ObjCInterfaceType. Code outside of ASTContext and the core type 4148/// system should not reference this type. 4149class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { 4150 friend class ASTContext; 4151 4152 // If anyone adds fields here, ObjCObjectType::getProtocolStorage() 4153 // will need to be modified. 4154 4155 ObjCObjectTypeImpl(QualType Canonical, QualType Base, 4156 ObjCProtocolDecl * const *Protocols, 4157 unsigned NumProtocols) 4158 : ObjCObjectType(Canonical, Base, Protocols, NumProtocols) {} 4159 4160public: 4161 void Profile(llvm::FoldingSetNodeID &ID); 4162 static void Profile(llvm::FoldingSetNodeID &ID, 4163 QualType Base, 4164 ObjCProtocolDecl *const *protocols, 4165 unsigned NumProtocols); 4166}; 4167 4168inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorage() { 4169 return reinterpret_cast<ObjCProtocolDecl**>( 4170 static_cast<ObjCObjectTypeImpl*>(this) + 1); 4171} 4172 4173/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 4174/// object oriented design. They basically correspond to C++ classes. There 4175/// are two kinds of interface types, normal interfaces like "NSString" and 4176/// qualified interfaces, which are qualified with a protocol list like 4177/// "NSString<NSCopyable, NSAmazing>". 4178/// 4179/// ObjCInterfaceType guarantees the following properties when considered 4180/// as a subtype of its superclass, ObjCObjectType: 4181/// - There are no protocol qualifiers. To reinforce this, code which 4182/// tries to invoke the protocol methods via an ObjCInterfaceType will 4183/// fail to compile. 4184/// - It is its own base type. That is, if T is an ObjCInterfaceType*, 4185/// T->getBaseType() == QualType(T, 0). 4186class ObjCInterfaceType : public ObjCObjectType { 4187 ObjCInterfaceDecl *Decl; 4188 4189 ObjCInterfaceType(const ObjCInterfaceDecl *D) 4190 : ObjCObjectType(Nonce_ObjCInterface), 4191 Decl(const_cast<ObjCInterfaceDecl*>(D)) {} 4192 friend class ASTContext; // ASTContext creates these. 4193 4194public: 4195 /// getDecl - Get the declaration of this interface. 4196 ObjCInterfaceDecl *getDecl() const { return Decl; } 4197 4198 bool isSugared() const { return false; } 4199 QualType desugar() const { return QualType(this, 0); } 4200 4201 static bool classof(const Type *T) { 4202 return T->getTypeClass() == ObjCInterface; 4203 } 4204 static bool classof(const ObjCInterfaceType *) { return true; } 4205 4206 // Nonsense to "hide" certain members of ObjCObjectType within this 4207 // class. People asking for protocols on an ObjCInterfaceType are 4208 // not going to get what they want: ObjCInterfaceTypes are 4209 // guaranteed to have no protocols. 4210 enum { 4211 qual_iterator, 4212 qual_begin, 4213 qual_end, 4214 getNumProtocols, 4215 getProtocol 4216 }; 4217}; 4218 4219inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { 4220 if (const ObjCInterfaceType *T = 4221 getBaseType()->getAs<ObjCInterfaceType>()) 4222 return T->getDecl(); 4223 return 0; 4224} 4225 4226/// ObjCObjectPointerType - Used to represent a pointer to an 4227/// Objective C object. These are constructed from pointer 4228/// declarators when the pointee type is an ObjCObjectType (or sugar 4229/// for one). In addition, the 'id' and 'Class' types are typedefs 4230/// for these, and the protocol-qualified types 'id<P>' and 'Class<P>' 4231/// are translated into these. 4232/// 4233/// Pointers to pointers to Objective C objects are still PointerTypes; 4234/// only the first level of pointer gets it own type implementation. 4235class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 4236 QualType PointeeType; 4237 4238 ObjCObjectPointerType(QualType Canonical, QualType Pointee) 4239 : Type(ObjCObjectPointer, Canonical, false, false, false, false), 4240 PointeeType(Pointee) {} 4241 friend class ASTContext; // ASTContext creates these. 4242 4243public: 4244 /// getPointeeType - Gets the type pointed to by this ObjC pointer. 4245 /// The result will always be an ObjCObjectType or sugar thereof. 4246 QualType getPointeeType() const { return PointeeType; } 4247 4248 /// getObjCObjectType - Gets the type pointed to by this ObjC 4249 /// pointer. This method always returns non-null. 4250 /// 4251 /// This method is equivalent to getPointeeType() except that 4252 /// it discards any typedefs (or other sugar) between this 4253 /// type and the "outermost" object type. So for: 4254 /// @class A; @protocol P; @protocol Q; 4255 /// typedef A<P> AP; 4256 /// typedef A A1; 4257 /// typedef A1<P> A1P; 4258 /// typedef A1P<Q> A1PQ; 4259 /// For 'A*', getObjectType() will return 'A'. 4260 /// For 'A<P>*', getObjectType() will return 'A<P>'. 4261 /// For 'AP*', getObjectType() will return 'A<P>'. 4262 /// For 'A1*', getObjectType() will return 'A'. 4263 /// For 'A1<P>*', getObjectType() will return 'A1<P>'. 4264 /// For 'A1P*', getObjectType() will return 'A1<P>'. 4265 /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because 4266 /// adding protocols to a protocol-qualified base discards the 4267 /// old qualifiers (for now). But if it didn't, getObjectType() 4268 /// would return 'A1P<Q>' (and we'd have to make iterating over 4269 /// qualifiers more complicated). 4270 const ObjCObjectType *getObjectType() const { 4271 return PointeeType->castAs<ObjCObjectType>(); 4272 } 4273 4274 /// getInterfaceType - If this pointer points to an Objective C 4275 /// @interface type, gets the type for that interface. Any protocol 4276 /// qualifiers on the interface are ignored. 4277 /// 4278 /// \return null if the base type for this pointer is 'id' or 'Class' 4279 const ObjCInterfaceType *getInterfaceType() const { 4280 return getObjectType()->getBaseType()->getAs<ObjCInterfaceType>(); 4281 } 4282 4283 /// getInterfaceDecl - If this pointer points to an Objective @interface 4284 /// type, gets the declaration for that interface. 4285 /// 4286 /// \return null if the base type for this pointer is 'id' or 'Class' 4287 ObjCInterfaceDecl *getInterfaceDecl() const { 4288 return getObjectType()->getInterface(); 4289 } 4290 4291 /// isObjCIdType - True if this is equivalent to the 'id' type, i.e. if 4292 /// its object type is the primitive 'id' type with no protocols. 4293 bool isObjCIdType() const { 4294 return getObjectType()->isObjCUnqualifiedId(); 4295 } 4296 4297 /// isObjCClassType - True if this is equivalent to the 'Class' type, 4298 /// i.e. if its object tive is the primitive 'Class' type with no protocols. 4299 bool isObjCClassType() const { 4300 return getObjectType()->isObjCUnqualifiedClass(); 4301 } 4302 4303 /// isObjCQualifiedIdType - True if this is equivalent to 'id<P>' for some 4304 /// non-empty set of protocols. 4305 bool isObjCQualifiedIdType() const { 4306 return getObjectType()->isObjCQualifiedId(); 4307 } 4308 4309 /// isObjCQualifiedClassType - True if this is equivalent to 'Class<P>' for 4310 /// some non-empty set of protocols. 4311 bool isObjCQualifiedClassType() const { 4312 return getObjectType()->isObjCQualifiedClass(); 4313 } 4314 4315 /// An iterator over the qualifiers on the object type. Provided 4316 /// for convenience. This will always iterate over the full set of 4317 /// protocols on a type, not just those provided directly. 4318 typedef ObjCObjectType::qual_iterator qual_iterator; 4319 4320 qual_iterator qual_begin() const { 4321 return getObjectType()->qual_begin(); 4322 } 4323 qual_iterator qual_end() const { 4324 return getObjectType()->qual_end(); 4325 } 4326 bool qual_empty() const { return getObjectType()->qual_empty(); } 4327 4328 /// getNumProtocols - Return the number of qualifying protocols on 4329 /// the object type. 4330 unsigned getNumProtocols() const { 4331 return getObjectType()->getNumProtocols(); 4332 } 4333 4334 /// \brief Retrieve a qualifying protocol by index on the object 4335 /// type. 4336 ObjCProtocolDecl *getProtocol(unsigned I) const { 4337 return getObjectType()->getProtocol(I); 4338 } 4339 4340 bool isSugared() const { return false; } 4341 QualType desugar() const { return QualType(this, 0); } 4342 4343 void Profile(llvm::FoldingSetNodeID &ID) { 4344 Profile(ID, getPointeeType()); 4345 } 4346 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 4347 ID.AddPointer(T.getAsOpaquePtr()); 4348 } 4349 static bool classof(const Type *T) { 4350 return T->getTypeClass() == ObjCObjectPointer; 4351 } 4352 static bool classof(const ObjCObjectPointerType *) { return true; } 4353}; 4354 4355/// A qualifier set is used to build a set of qualifiers. 4356class QualifierCollector : public Qualifiers { 4357public: 4358 QualifierCollector(Qualifiers Qs = Qualifiers()) : Qualifiers(Qs) {} 4359 4360 /// Collect any qualifiers on the given type and return an 4361 /// unqualified type. The qualifiers are assumed to be consistent 4362 /// with those already in the type. 4363 const Type *strip(QualType type) { 4364 addFastQualifiers(type.getLocalFastQualifiers()); 4365 if (!type.hasLocalNonFastQualifiers()) 4366 return type.getTypePtrUnsafe(); 4367 4368 const ExtQuals *extQuals = type.getExtQualsUnsafe(); 4369 addConsistentQualifiers(extQuals->getQualifiers()); 4370 return extQuals->getBaseType(); 4371 } 4372 4373 /// Apply the collected qualifiers to the given type. 4374 QualType apply(const ASTContext &Context, QualType QT) const; 4375 4376 /// Apply the collected qualifiers to the given type. 4377 QualType apply(const ASTContext &Context, const Type* T) const; 4378}; 4379 4380 4381// Inline function definitions. 4382 4383inline const Type *QualType::getTypePtr() const { 4384 return getCommonPtr()->BaseType; 4385} 4386 4387inline const Type *QualType::getTypePtrOrNull() const { 4388 return (isNull() ? 0 : getCommonPtr()->BaseType); 4389} 4390 4391inline SplitQualType QualType::split() const { 4392 if (!hasLocalNonFastQualifiers()) 4393 return SplitQualType(getTypePtrUnsafe(), 4394 Qualifiers::fromFastMask(getLocalFastQualifiers())); 4395 4396 const ExtQuals *eq = getExtQualsUnsafe(); 4397 Qualifiers qs = eq->getQualifiers(); 4398 qs.addFastQualifiers(getLocalFastQualifiers()); 4399 return SplitQualType(eq->getBaseType(), qs); 4400} 4401 4402inline Qualifiers QualType::getLocalQualifiers() const { 4403 Qualifiers Quals; 4404 if (hasLocalNonFastQualifiers()) 4405 Quals = getExtQualsUnsafe()->getQualifiers(); 4406 Quals.addFastQualifiers(getLocalFastQualifiers()); 4407 return Quals; 4408} 4409 4410inline Qualifiers QualType::getQualifiers() const { 4411 Qualifiers quals = getCommonPtr()->CanonicalType.getLocalQualifiers(); 4412 quals.addFastQualifiers(getLocalFastQualifiers()); 4413 return quals; 4414} 4415 4416inline unsigned QualType::getCVRQualifiers() const { 4417 unsigned cvr = getCommonPtr()->CanonicalType.getLocalCVRQualifiers(); 4418 cvr |= getLocalCVRQualifiers(); 4419 return cvr; 4420} 4421 4422inline QualType QualType::getCanonicalType() const { 4423 QualType canon = getCommonPtr()->CanonicalType; 4424 return canon.withFastQualifiers(getLocalFastQualifiers()); 4425} 4426 4427inline bool QualType::isCanonical() const { 4428 return getTypePtr()->isCanonicalUnqualified(); 4429} 4430 4431inline bool QualType::isCanonicalAsParam() const { 4432 if (!isCanonical()) return false; 4433 if (hasLocalQualifiers()) return false; 4434 4435 const Type *T = getTypePtr(); 4436 if (T->isVariablyModifiedType() && T->hasSizedVLAType()) 4437 return false; 4438 4439 return !isa<FunctionType>(T) && !isa<ArrayType>(T); 4440} 4441 4442inline bool QualType::isConstQualified() const { 4443 return isLocalConstQualified() || 4444 getCommonPtr()->CanonicalType.isLocalConstQualified(); 4445} 4446 4447inline bool QualType::isRestrictQualified() const { 4448 return isLocalRestrictQualified() || 4449 getCommonPtr()->CanonicalType.isLocalRestrictQualified(); 4450} 4451 4452 4453inline bool QualType::isVolatileQualified() const { 4454 return isLocalVolatileQualified() || 4455 getCommonPtr()->CanonicalType.isLocalVolatileQualified(); 4456} 4457 4458inline bool QualType::hasQualifiers() const { 4459 return hasLocalQualifiers() || 4460 getCommonPtr()->CanonicalType.hasLocalQualifiers(); 4461} 4462 4463inline QualType QualType::getUnqualifiedType() const { 4464 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4465 return QualType(getTypePtr(), 0); 4466 4467 return QualType(getSplitUnqualifiedTypeImpl(*this).first, 0); 4468} 4469 4470inline SplitQualType QualType::getSplitUnqualifiedType() const { 4471 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4472 return split(); 4473 4474 return getSplitUnqualifiedTypeImpl(*this); 4475} 4476 4477inline void QualType::removeLocalConst() { 4478 removeLocalFastQualifiers(Qualifiers::Const); 4479} 4480 4481inline void QualType::removeLocalRestrict() { 4482 removeLocalFastQualifiers(Qualifiers::Restrict); 4483} 4484 4485inline void QualType::removeLocalVolatile() { 4486 removeLocalFastQualifiers(Qualifiers::Volatile); 4487} 4488 4489inline void QualType::removeLocalCVRQualifiers(unsigned Mask) { 4490 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 4491 assert((int)Qualifiers::CVRMask == (int)Qualifiers::FastMask); 4492 4493 // Fast path: we don't need to touch the slow qualifiers. 4494 removeLocalFastQualifiers(Mask); 4495} 4496 4497/// getAddressSpace - Return the address space of this type. 4498inline unsigned QualType::getAddressSpace() const { 4499 return getQualifiers().getAddressSpace(); 4500} 4501 4502/// getObjCGCAttr - Return the gc attribute of this type. 4503inline Qualifiers::GC QualType::getObjCGCAttr() const { 4504 return getQualifiers().getObjCGCAttr(); 4505} 4506 4507inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { 4508 if (const PointerType *PT = t.getAs<PointerType>()) { 4509 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 4510 return FT->getExtInfo(); 4511 } else if (const FunctionType *FT = t.getAs<FunctionType>()) 4512 return FT->getExtInfo(); 4513 4514 return FunctionType::ExtInfo(); 4515} 4516 4517inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { 4518 return getFunctionExtInfo(*t); 4519} 4520 4521/// isMoreQualifiedThan - Determine whether this type is more 4522/// qualified than the Other type. For example, "const volatile int" 4523/// is more qualified than "const int", "volatile int", and 4524/// "int". However, it is not more qualified than "const volatile 4525/// int". 4526inline bool QualType::isMoreQualifiedThan(QualType other) const { 4527 Qualifiers myQuals = getQualifiers(); 4528 Qualifiers otherQuals = other.getQualifiers(); 4529 return (myQuals != otherQuals && myQuals.compatiblyIncludes(otherQuals)); 4530} 4531 4532/// isAtLeastAsQualifiedAs - Determine whether this type is at last 4533/// as qualified as the Other type. For example, "const volatile 4534/// int" is at least as qualified as "const int", "volatile int", 4535/// "int", and "const volatile int". 4536inline bool QualType::isAtLeastAsQualifiedAs(QualType other) const { 4537 return getQualifiers().compatiblyIncludes(other.getQualifiers()); 4538} 4539 4540/// getNonReferenceType - If Type is a reference type (e.g., const 4541/// int&), returns the type that the reference refers to ("const 4542/// int"). Otherwise, returns the type itself. This routine is used 4543/// throughout Sema to implement C++ 5p6: 4544/// 4545/// If an expression initially has the type "reference to T" (8.3.2, 4546/// 8.5.3), the type is adjusted to "T" prior to any further 4547/// analysis, the expression designates the object or function 4548/// denoted by the reference, and the expression is an lvalue. 4549inline QualType QualType::getNonReferenceType() const { 4550 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 4551 return RefType->getPointeeType(); 4552 else 4553 return *this; 4554} 4555 4556inline bool QualType::isCForbiddenLValueType() const { 4557 return ((getTypePtr()->isVoidType() && !hasQualifiers()) || 4558 getTypePtr()->isFunctionType()); 4559} 4560 4561/// \brief Tests whether the type is categorized as a fundamental type. 4562/// 4563/// \returns True for types specified in C++0x [basic.fundamental]. 4564inline bool Type::isFundamentalType() const { 4565 return isVoidType() || 4566 // FIXME: It's really annoying that we don't have an 4567 // 'isArithmeticType()' which agrees with the standard definition. 4568 (isArithmeticType() && !isEnumeralType()); 4569} 4570 4571/// \brief Tests whether the type is categorized as a compound type. 4572/// 4573/// \returns True for types specified in C++0x [basic.compound]. 4574inline bool Type::isCompoundType() const { 4575 // C++0x [basic.compound]p1: 4576 // Compound types can be constructed in the following ways: 4577 // -- arrays of objects of a given type [...]; 4578 return isArrayType() || 4579 // -- functions, which have parameters of given types [...]; 4580 isFunctionType() || 4581 // -- pointers to void or objects or functions [...]; 4582 isPointerType() || 4583 // -- references to objects or functions of a given type. [...] 4584 isReferenceType() || 4585 // -- classes containing a sequence of objects of various types, [...]; 4586 isRecordType() || 4587 // -- unions, which ar classes capable of containing objects of different types at different times; 4588 isUnionType() || 4589 // -- enumerations, which comprise a set of named constant values. [...]; 4590 isEnumeralType() || 4591 // -- pointers to non-static class members, [...]. 4592 isMemberPointerType(); 4593} 4594 4595inline bool Type::isFunctionType() const { 4596 return isa<FunctionType>(CanonicalType); 4597} 4598inline bool Type::isPointerType() const { 4599 return isa<PointerType>(CanonicalType); 4600} 4601inline bool Type::isAnyPointerType() const { 4602 return isPointerType() || isObjCObjectPointerType(); 4603} 4604inline bool Type::isBlockPointerType() const { 4605 return isa<BlockPointerType>(CanonicalType); 4606} 4607inline bool Type::isReferenceType() const { 4608 return isa<ReferenceType>(CanonicalType); 4609} 4610inline bool Type::isLValueReferenceType() const { 4611 return isa<LValueReferenceType>(CanonicalType); 4612} 4613inline bool Type::isRValueReferenceType() const { 4614 return isa<RValueReferenceType>(CanonicalType); 4615} 4616inline bool Type::isFunctionPointerType() const { 4617 if (const PointerType *T = getAs<PointerType>()) 4618 return T->getPointeeType()->isFunctionType(); 4619 else 4620 return false; 4621} 4622inline bool Type::isMemberPointerType() const { 4623 return isa<MemberPointerType>(CanonicalType); 4624} 4625inline bool Type::isMemberFunctionPointerType() const { 4626 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4627 return T->isMemberFunctionPointer(); 4628 else 4629 return false; 4630} 4631inline bool Type::isMemberDataPointerType() const { 4632 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4633 return T->isMemberDataPointer(); 4634 else 4635 return false; 4636} 4637inline bool Type::isArrayType() const { 4638 return isa<ArrayType>(CanonicalType); 4639} 4640inline bool Type::isConstantArrayType() const { 4641 return isa<ConstantArrayType>(CanonicalType); 4642} 4643inline bool Type::isIncompleteArrayType() const { 4644 return isa<IncompleteArrayType>(CanonicalType); 4645} 4646inline bool Type::isVariableArrayType() const { 4647 return isa<VariableArrayType>(CanonicalType); 4648} 4649inline bool Type::isDependentSizedArrayType() const { 4650 return isa<DependentSizedArrayType>(CanonicalType); 4651} 4652inline bool Type::isBuiltinType() const { 4653 return isa<BuiltinType>(CanonicalType); 4654} 4655inline bool Type::isRecordType() const { 4656 return isa<RecordType>(CanonicalType); 4657} 4658inline bool Type::isEnumeralType() const { 4659 return isa<EnumType>(CanonicalType); 4660} 4661inline bool Type::isAnyComplexType() const { 4662 return isa<ComplexType>(CanonicalType); 4663} 4664inline bool Type::isVectorType() const { 4665 return isa<VectorType>(CanonicalType); 4666} 4667inline bool Type::isExtVectorType() const { 4668 return isa<ExtVectorType>(CanonicalType); 4669} 4670inline bool Type::isObjCObjectPointerType() const { 4671 return isa<ObjCObjectPointerType>(CanonicalType); 4672} 4673inline bool Type::isObjCObjectType() const { 4674 return isa<ObjCObjectType>(CanonicalType); 4675} 4676inline bool Type::isObjCObjectOrInterfaceType() const { 4677 return isa<ObjCInterfaceType>(CanonicalType) || 4678 isa<ObjCObjectType>(CanonicalType); 4679} 4680 4681inline bool Type::isObjCQualifiedIdType() const { 4682 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4683 return OPT->isObjCQualifiedIdType(); 4684 return false; 4685} 4686inline bool Type::isObjCQualifiedClassType() const { 4687 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4688 return OPT->isObjCQualifiedClassType(); 4689 return false; 4690} 4691inline bool Type::isObjCIdType() const { 4692 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4693 return OPT->isObjCIdType(); 4694 return false; 4695} 4696inline bool Type::isObjCClassType() const { 4697 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4698 return OPT->isObjCClassType(); 4699 return false; 4700} 4701inline bool Type::isObjCSelType() const { 4702 if (const PointerType *OPT = getAs<PointerType>()) 4703 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 4704 return false; 4705} 4706inline bool Type::isObjCBuiltinType() const { 4707 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 4708} 4709inline bool Type::isTemplateTypeParmType() const { 4710 return isa<TemplateTypeParmType>(CanonicalType); 4711} 4712 4713inline bool Type::isSpecificBuiltinType(unsigned K) const { 4714 if (const BuiltinType *BT = getAs<BuiltinType>()) 4715 if (BT->getKind() == (BuiltinType::Kind) K) 4716 return true; 4717 return false; 4718} 4719 4720inline bool Type::isPlaceholderType() const { 4721 if (const BuiltinType *BT = getAs<BuiltinType>()) 4722 return BT->isPlaceholderType(); 4723 return false; 4724} 4725 4726inline bool Type::isSpecificPlaceholderType(unsigned K) const { 4727 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4728 return (BT->getKind() == (BuiltinType::Kind) K); 4729 return false; 4730} 4731 4732/// \brief Determines whether this is a type for which one can define 4733/// an overloaded operator. 4734inline bool Type::isOverloadableType() const { 4735 return isDependentType() || isRecordType() || isEnumeralType(); 4736} 4737 4738/// \brief Determines whether this type can decay to a pointer type. 4739inline bool Type::canDecayToPointerType() const { 4740 return isFunctionType() || isArrayType(); 4741} 4742 4743inline bool Type::hasPointerRepresentation() const { 4744 return (isPointerType() || isReferenceType() || isBlockPointerType() || 4745 isObjCObjectPointerType() || isNullPtrType()); 4746} 4747 4748inline bool Type::hasObjCPointerRepresentation() const { 4749 return isObjCObjectPointerType(); 4750} 4751 4752inline const Type *Type::getBaseElementTypeUnsafe() const { 4753 const Type *type = this; 4754 while (const ArrayType *arrayType = type->getAsArrayTypeUnsafe()) 4755 type = arrayType->getElementType().getTypePtr(); 4756 return type; 4757} 4758 4759/// Insertion operator for diagnostics. This allows sending QualType's into a 4760/// diagnostic with <<. 4761inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 4762 QualType T) { 4763 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 4764 DiagnosticsEngine::ak_qualtype); 4765 return DB; 4766} 4767 4768/// Insertion operator for partial diagnostics. This allows sending QualType's 4769/// into a diagnostic with <<. 4770inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, 4771 QualType T) { 4772 PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 4773 DiagnosticsEngine::ak_qualtype); 4774 return PD; 4775} 4776 4777// Helper class template that is used by Type::getAs to ensure that one does 4778// not try to look through a qualified type to get to an array type. 4779template<typename T, 4780 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 4781 llvm::is_base_of<ArrayType, T>::value)> 4782struct ArrayType_cannot_be_used_with_getAs { }; 4783 4784template<typename T> 4785struct ArrayType_cannot_be_used_with_getAs<T, true>; 4786 4787/// Member-template getAs<specific type>'. 4788template <typename T> const T *Type::getAs() const { 4789 ArrayType_cannot_be_used_with_getAs<T> at; 4790 (void)at; 4791 4792 // If this is directly a T type, return it. 4793 if (const T *Ty = dyn_cast<T>(this)) 4794 return Ty; 4795 4796 // If the canonical form of this type isn't the right kind, reject it. 4797 if (!isa<T>(CanonicalType)) 4798 return 0; 4799 4800 // If this is a typedef for the type, strip the typedef off without 4801 // losing all typedef information. 4802 return cast<T>(getUnqualifiedDesugaredType()); 4803} 4804 4805inline const ArrayType *Type::getAsArrayTypeUnsafe() const { 4806 // If this is directly an array type, return it. 4807 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) 4808 return arr; 4809 4810 // If the canonical form of this type isn't the right kind, reject it. 4811 if (!isa<ArrayType>(CanonicalType)) 4812 return 0; 4813 4814 // If this is a typedef for the type, strip the typedef off without 4815 // losing all typedef information. 4816 return cast<ArrayType>(getUnqualifiedDesugaredType()); 4817} 4818 4819template <typename T> const T *Type::castAs() const { 4820 ArrayType_cannot_be_used_with_getAs<T> at; 4821 (void) at; 4822 4823 assert(isa<T>(CanonicalType)); 4824 if (const T *ty = dyn_cast<T>(this)) return ty; 4825 return cast<T>(getUnqualifiedDesugaredType()); 4826} 4827 4828inline const ArrayType *Type::castAsArrayTypeUnsafe() const { 4829 assert(isa<ArrayType>(CanonicalType)); 4830 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) return arr; 4831 return cast<ArrayType>(getUnqualifiedDesugaredType()); 4832} 4833 4834} // end namespace clang 4835 4836#endif 4837