Type.h revision 561f81243f665cf2001caadc45df505f826b72d6
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/Casting.h" 26#include "llvm/Support/type_traits.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 33using llvm::isa; 34using llvm::cast; 35using llvm::cast_or_null; 36using llvm::dyn_cast; 37using llvm::dyn_cast_or_null; 38namespace clang { 39 enum { 40 TypeAlignmentInBits = 4, 41 TypeAlignment = 1 << TypeAlignmentInBits 42 }; 43 class Type; 44 class ExtQuals; 45 class QualType; 46} 47 48namespace llvm { 49 template <typename T> 50 class PointerLikeTypeTraits; 51 template<> 52 class PointerLikeTypeTraits< ::clang::Type*> { 53 public: 54 static inline void *getAsVoidPointer(::clang::Type *P) { return P; } 55 static inline ::clang::Type *getFromVoidPointer(void *P) { 56 return static_cast< ::clang::Type*>(P); 57 } 58 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 59 }; 60 template<> 61 class PointerLikeTypeTraits< ::clang::ExtQuals*> { 62 public: 63 static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; } 64 static inline ::clang::ExtQuals *getFromVoidPointer(void *P) { 65 return static_cast< ::clang::ExtQuals*>(P); 66 } 67 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 68 }; 69 70 template <> 71 struct isPodLike<clang::QualType> { static const bool value = true; }; 72} 73 74namespace clang { 75 class ASTContext; 76 class TypedefNameDecl; 77 class TemplateDecl; 78 class TemplateTypeParmDecl; 79 class NonTypeTemplateParmDecl; 80 class TemplateTemplateParmDecl; 81 class TagDecl; 82 class RecordDecl; 83 class CXXRecordDecl; 84 class EnumDecl; 85 class FieldDecl; 86 class ObjCInterfaceDecl; 87 class ObjCProtocolDecl; 88 class ObjCMethodDecl; 89 class UnresolvedUsingTypenameDecl; 90 class Expr; 91 class Stmt; 92 class SourceLocation; 93 class StmtIteratorBase; 94 class TemplateArgument; 95 class TemplateArgumentLoc; 96 class TemplateArgumentListInfo; 97 class ElaboratedType; 98 class ExtQuals; 99 class ExtQualsTypeCommonBase; 100 struct PrintingPolicy; 101 102 template <typename> class CanQual; 103 typedef CanQual<Type> CanQualType; 104 105 // Provide forward declarations for all of the *Type classes 106#define TYPE(Class, Base) class Class##Type; 107#include "clang/AST/TypeNodes.def" 108 109/// Qualifiers - The collection of all-type qualifiers we support. 110/// Clang supports five independent qualifiers: 111/// * C99: const, volatile, and restrict 112/// * Embedded C (TR18037): address spaces 113/// * Objective C: the GC attributes (none, weak, or strong) 114class Qualifiers { 115public: 116 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 117 Const = 0x1, 118 Restrict = 0x2, 119 Volatile = 0x4, 120 CVRMask = Const | Volatile | Restrict 121 }; 122 123 enum GC { 124 GCNone = 0, 125 Weak, 126 Strong 127 }; 128 129 enum ObjCLifetime { 130 /// There is no lifetime qualification on this type. 131 OCL_None, 132 133 /// This object can be modified without requiring retains or 134 /// releases. 135 OCL_ExplicitNone, 136 137 /// Assigning into this object requires the old value to be 138 /// released and the new value to be retained. The timing of the 139 /// release of the old value is inexact: it may be moved to 140 /// immediately after the last known point where the value is 141 /// live. 142 OCL_Strong, 143 144 /// Reading or writing from this object requires a barrier call. 145 OCL_Weak, 146 147 /// Assigning into this object requires a lifetime extension. 148 OCL_Autoreleasing 149 }; 150 151 enum { 152 /// The maximum supported address space number. 153 /// 24 bits should be enough for anyone. 154 MaxAddressSpace = 0xffffffu, 155 156 /// The width of the "fast" qualifier mask. 157 FastWidth = 3, 158 159 /// The fast qualifier mask. 160 FastMask = (1 << FastWidth) - 1 161 }; 162 163 Qualifiers() : Mask(0) {} 164 165 static Qualifiers fromFastMask(unsigned Mask) { 166 Qualifiers Qs; 167 Qs.addFastQualifiers(Mask); 168 return Qs; 169 } 170 171 static Qualifiers fromCVRMask(unsigned CVR) { 172 Qualifiers Qs; 173 Qs.addCVRQualifiers(CVR); 174 return Qs; 175 } 176 177 // Deserialize qualifiers from an opaque representation. 178 static Qualifiers fromOpaqueValue(unsigned opaque) { 179 Qualifiers Qs; 180 Qs.Mask = opaque; 181 return Qs; 182 } 183 184 // Serialize these qualifiers into an opaque representation. 185 unsigned getAsOpaqueValue() const { 186 return Mask; 187 } 188 189 bool hasConst() const { return Mask & Const; } 190 void setConst(bool flag) { 191 Mask = (Mask & ~Const) | (flag ? Const : 0); 192 } 193 void removeConst() { Mask &= ~Const; } 194 void addConst() { Mask |= Const; } 195 196 bool hasVolatile() const { return Mask & Volatile; } 197 void setVolatile(bool flag) { 198 Mask = (Mask & ~Volatile) | (flag ? Volatile : 0); 199 } 200 void removeVolatile() { Mask &= ~Volatile; } 201 void addVolatile() { Mask |= Volatile; } 202 203 bool hasRestrict() const { return Mask & Restrict; } 204 void setRestrict(bool flag) { 205 Mask = (Mask & ~Restrict) | (flag ? Restrict : 0); 206 } 207 void removeRestrict() { Mask &= ~Restrict; } 208 void addRestrict() { Mask |= Restrict; } 209 210 bool hasCVRQualifiers() const { return getCVRQualifiers(); } 211 unsigned getCVRQualifiers() const { return Mask & CVRMask; } 212 void setCVRQualifiers(unsigned mask) { 213 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 214 Mask = (Mask & ~CVRMask) | mask; 215 } 216 void removeCVRQualifiers(unsigned mask) { 217 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 218 Mask &= ~mask; 219 } 220 void removeCVRQualifiers() { 221 removeCVRQualifiers(CVRMask); 222 } 223 void addCVRQualifiers(unsigned mask) { 224 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 225 Mask |= mask; 226 } 227 228 bool hasObjCGCAttr() const { return Mask & GCAttrMask; } 229 GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); } 230 void setObjCGCAttr(GC type) { 231 Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift); 232 } 233 void removeObjCGCAttr() { setObjCGCAttr(GCNone); } 234 void addObjCGCAttr(GC type) { 235 assert(type); 236 setObjCGCAttr(type); 237 } 238 Qualifiers withoutObjCGCAttr() const { 239 Qualifiers qs = *this; 240 qs.removeObjCGCAttr(); 241 return qs; 242 } 243 Qualifiers withoutObjCGLifetime() const { 244 Qualifiers qs = *this; 245 qs.removeObjCLifetime(); 246 return qs; 247 } 248 249 bool hasObjCLifetime() const { return Mask & LifetimeMask; } 250 ObjCLifetime getObjCLifetime() const { 251 return ObjCLifetime((Mask & LifetimeMask) >> LifetimeShift); 252 } 253 void setObjCLifetime(ObjCLifetime type) { 254 Mask = (Mask & ~LifetimeMask) | (type << LifetimeShift); 255 } 256 void removeObjCLifetime() { setObjCLifetime(OCL_None); } 257 void addObjCLifetime(ObjCLifetime type) { 258 assert(type); 259 setObjCLifetime(type); 260 } 261 262 /// True if the lifetime is neither None or ExplicitNone. 263 bool hasNonTrivialObjCLifetime() const { 264 ObjCLifetime lifetime = getObjCLifetime(); 265 return (lifetime > OCL_ExplicitNone); 266 } 267 268 /// True if the lifetime is either strong or weak. 269 bool hasStrongOrWeakObjCLifetime() const { 270 ObjCLifetime lifetime = getObjCLifetime(); 271 return (lifetime == OCL_Strong || lifetime == OCL_Weak); 272 } 273 274 bool hasAddressSpace() const { return Mask & AddressSpaceMask; } 275 unsigned getAddressSpace() const { return Mask >> AddressSpaceShift; } 276 void setAddressSpace(unsigned space) { 277 assert(space <= MaxAddressSpace); 278 Mask = (Mask & ~AddressSpaceMask) 279 | (((uint32_t) space) << AddressSpaceShift); 280 } 281 void removeAddressSpace() { setAddressSpace(0); } 282 void addAddressSpace(unsigned space) { 283 assert(space); 284 setAddressSpace(space); 285 } 286 287 // Fast qualifiers are those that can be allocated directly 288 // on a QualType object. 289 bool hasFastQualifiers() const { return getFastQualifiers(); } 290 unsigned getFastQualifiers() const { return Mask & FastMask; } 291 void setFastQualifiers(unsigned mask) { 292 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 293 Mask = (Mask & ~FastMask) | mask; 294 } 295 void removeFastQualifiers(unsigned mask) { 296 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 297 Mask &= ~mask; 298 } 299 void removeFastQualifiers() { 300 removeFastQualifiers(FastMask); 301 } 302 void addFastQualifiers(unsigned mask) { 303 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 304 Mask |= mask; 305 } 306 307 /// hasNonFastQualifiers - Return true if the set contains any 308 /// qualifiers which require an ExtQuals node to be allocated. 309 bool hasNonFastQualifiers() const { return Mask & ~FastMask; } 310 Qualifiers getNonFastQualifiers() const { 311 Qualifiers Quals = *this; 312 Quals.setFastQualifiers(0); 313 return Quals; 314 } 315 316 /// hasQualifiers - Return true if the set contains any qualifiers. 317 bool hasQualifiers() const { return Mask; } 318 bool empty() const { return !Mask; } 319 320 /// \brief Add the qualifiers from the given set to this set. 321 void addQualifiers(Qualifiers Q) { 322 // If the other set doesn't have any non-boolean qualifiers, just 323 // bit-or it in. 324 if (!(Q.Mask & ~CVRMask)) 325 Mask |= Q.Mask; 326 else { 327 Mask |= (Q.Mask & CVRMask); 328 if (Q.hasAddressSpace()) 329 addAddressSpace(Q.getAddressSpace()); 330 if (Q.hasObjCGCAttr()) 331 addObjCGCAttr(Q.getObjCGCAttr()); 332 if (Q.hasObjCLifetime()) 333 addObjCLifetime(Q.getObjCLifetime()); 334 } 335 } 336 337 /// \brief Add the qualifiers from the given set to this set, given that 338 /// they don't conflict. 339 void addConsistentQualifiers(Qualifiers qs) { 340 assert(getAddressSpace() == qs.getAddressSpace() || 341 !hasAddressSpace() || !qs.hasAddressSpace()); 342 assert(getObjCGCAttr() == qs.getObjCGCAttr() || 343 !hasObjCGCAttr() || !qs.hasObjCGCAttr()); 344 assert(getObjCLifetime() == qs.getObjCLifetime() || 345 !hasObjCLifetime() || !qs.hasObjCLifetime()); 346 Mask |= qs.Mask; 347 } 348 349 /// \brief Determines if these qualifiers compatibly include another set. 350 /// Generally this answers the question of whether an object with the other 351 /// qualifiers can be safely used as an object with these qualifiers. 352 bool compatiblyIncludes(Qualifiers other) const { 353 return 354 // Address spaces must match exactly. 355 getAddressSpace() == other.getAddressSpace() && 356 // ObjC GC qualifiers can match, be added, or be removed, but can't be 357 // changed. 358 (getObjCGCAttr() == other.getObjCGCAttr() || 359 !hasObjCGCAttr() || !other.hasObjCGCAttr()) && 360 // ObjC lifetime qualifiers must match exactly. 361 getObjCLifetime() == other.getObjCLifetime() && 362 // CVR qualifiers may subset. 363 (((Mask & CVRMask) | (other.Mask & CVRMask)) == (Mask & CVRMask)); 364 } 365 366 /// \brief Determines if these qualifiers compatibly include another set of 367 /// qualifiers from the narrow perspective of Objective-C ARC lifetime. 368 /// 369 /// One set of Objective-C lifetime qualifiers compatibly includes the other 370 /// if the lifetime qualifiers match, or if both are non-__weak and the 371 /// including set also contains the 'const' qualifier. 372 bool compatiblyIncludesObjCLifetime(Qualifiers other) const { 373 if (getObjCLifetime() == other.getObjCLifetime()) 374 return true; 375 376 if (getObjCLifetime() == OCL_Weak || other.getObjCLifetime() == OCL_Weak) 377 return false; 378 379 return hasConst(); 380 } 381 382 bool isSupersetOf(Qualifiers Other) const; 383 384 /// \brief Determine whether this set of qualifiers is a strict superset of 385 /// another set of qualifiers, not considering qualifier compatibility. 386 bool isStrictSupersetOf(Qualifiers Other) const; 387 388 bool operator==(Qualifiers Other) const { return Mask == Other.Mask; } 389 bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; } 390 391 operator bool() const { return hasQualifiers(); } 392 393 Qualifiers &operator+=(Qualifiers R) { 394 addQualifiers(R); 395 return *this; 396 } 397 398 // Union two qualifier sets. If an enumerated qualifier appears 399 // in both sets, use the one from the right. 400 friend Qualifiers operator+(Qualifiers L, Qualifiers R) { 401 L += R; 402 return L; 403 } 404 405 Qualifiers &operator-=(Qualifiers R) { 406 Mask = Mask & ~(R.Mask); 407 return *this; 408 } 409 410 /// \brief Compute the difference between two qualifier sets. 411 friend Qualifiers operator-(Qualifiers L, Qualifiers R) { 412 L -= R; 413 return L; 414 } 415 416 std::string getAsString() const; 417 std::string getAsString(const PrintingPolicy &Policy) const { 418 std::string Buffer; 419 getAsStringInternal(Buffer, Policy); 420 return Buffer; 421 } 422 void getAsStringInternal(std::string &S, const PrintingPolicy &Policy) const; 423 424 void Profile(llvm::FoldingSetNodeID &ID) const { 425 ID.AddInteger(Mask); 426 } 427 428private: 429 430 // bits: |0 1 2|3 .. 4|5 .. 7|8 ... 31| 431 // |C R V|GCAttr|Lifetime|AddressSpace| 432 uint32_t Mask; 433 434 static const uint32_t GCAttrMask = 0x18; 435 static const uint32_t GCAttrShift = 3; 436 static const uint32_t LifetimeMask = 0xE0; 437 static const uint32_t LifetimeShift = 5; 438 static const uint32_t AddressSpaceMask = ~(CVRMask|GCAttrMask|LifetimeMask); 439 static const uint32_t AddressSpaceShift = 8; 440}; 441 442/// CallingConv - Specifies the calling convention that a function uses. 443enum CallingConv { 444 CC_Default, 445 CC_C, // __attribute__((cdecl)) 446 CC_X86StdCall, // __attribute__((stdcall)) 447 CC_X86FastCall, // __attribute__((fastcall)) 448 CC_X86ThisCall, // __attribute__((thiscall)) 449 CC_X86Pascal, // __attribute__((pascal)) 450 CC_AAPCS, // __attribute__((pcs("aapcs"))) 451 CC_AAPCS_VFP // __attribute__((pcs("aapcs-vfp"))) 452}; 453 454typedef std::pair<const Type*, Qualifiers> SplitQualType; 455 456/// QualType - For efficiency, we don't store CV-qualified types as nodes on 457/// their own: instead each reference to a type stores the qualifiers. This 458/// greatly reduces the number of nodes we need to allocate for types (for 459/// example we only need one for 'int', 'const int', 'volatile int', 460/// 'const volatile int', etc). 461/// 462/// As an added efficiency bonus, instead of making this a pair, we 463/// just store the two bits we care about in the low bits of the 464/// pointer. To handle the packing/unpacking, we make QualType be a 465/// simple wrapper class that acts like a smart pointer. A third bit 466/// indicates whether there are extended qualifiers present, in which 467/// case the pointer points to a special structure. 468class QualType { 469 // Thankfully, these are efficiently composable. 470 llvm::PointerIntPair<llvm::PointerUnion<const Type*,const ExtQuals*>, 471 Qualifiers::FastWidth> Value; 472 473 const ExtQuals *getExtQualsUnsafe() const { 474 return Value.getPointer().get<const ExtQuals*>(); 475 } 476 477 const Type *getTypePtrUnsafe() const { 478 return Value.getPointer().get<const Type*>(); 479 } 480 481 const ExtQualsTypeCommonBase *getCommonPtr() const { 482 assert(!isNull() && "Cannot retrieve a NULL type pointer"); 483 uintptr_t CommonPtrVal 484 = reinterpret_cast<uintptr_t>(Value.getOpaqueValue()); 485 CommonPtrVal &= ~(uintptr_t)((1 << TypeAlignmentInBits) - 1); 486 return reinterpret_cast<ExtQualsTypeCommonBase*>(CommonPtrVal); 487 } 488 489 friend class QualifierCollector; 490public: 491 QualType() {} 492 493 QualType(const Type *Ptr, unsigned Quals) 494 : Value(Ptr, Quals) {} 495 QualType(const ExtQuals *Ptr, unsigned Quals) 496 : Value(Ptr, Quals) {} 497 498 unsigned getLocalFastQualifiers() const { return Value.getInt(); } 499 void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); } 500 501 /// Retrieves a pointer to the underlying (unqualified) type. 502 /// This should really return a const Type, but it's not worth 503 /// changing all the users right now. 504 /// 505 /// This function requires that the type not be NULL. If the type might be 506 /// NULL, use the (slightly less efficient) \c getTypePtrOrNull(). 507 const Type *getTypePtr() const; 508 509 const Type *getTypePtrOrNull() const; 510 511 /// Divides a QualType into its unqualified type and a set of local 512 /// qualifiers. 513 SplitQualType split() const; 514 515 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 516 static QualType getFromOpaquePtr(const void *Ptr) { 517 QualType T; 518 T.Value.setFromOpaqueValue(const_cast<void*>(Ptr)); 519 return T; 520 } 521 522 const Type &operator*() const { 523 return *getTypePtr(); 524 } 525 526 const Type *operator->() const { 527 return getTypePtr(); 528 } 529 530 bool isCanonical() const; 531 bool isCanonicalAsParam() const; 532 533 /// isNull - Return true if this QualType doesn't point to a type yet. 534 bool isNull() const { 535 return Value.getPointer().isNull(); 536 } 537 538 /// \brief Determine whether this particular QualType instance has the 539 /// "const" qualifier set, without looking through typedefs that may have 540 /// added "const" at a different level. 541 bool isLocalConstQualified() const { 542 return (getLocalFastQualifiers() & Qualifiers::Const); 543 } 544 545 /// \brief Determine whether this type is const-qualified. 546 bool isConstQualified() const; 547 548 /// \brief Determine whether this particular QualType instance has the 549 /// "restrict" qualifier set, without looking through typedefs that may have 550 /// added "restrict" at a different level. 551 bool isLocalRestrictQualified() const { 552 return (getLocalFastQualifiers() & Qualifiers::Restrict); 553 } 554 555 /// \brief Determine whether this type is restrict-qualified. 556 bool isRestrictQualified() const; 557 558 /// \brief Determine whether this particular QualType instance has the 559 /// "volatile" qualifier set, without looking through typedefs that may have 560 /// added "volatile" at a different level. 561 bool isLocalVolatileQualified() const { 562 return (getLocalFastQualifiers() & Qualifiers::Volatile); 563 } 564 565 /// \brief Determine whether this type is volatile-qualified. 566 bool isVolatileQualified() const; 567 568 /// \brief Determine whether this particular QualType instance has any 569 /// qualifiers, without looking through any typedefs that might add 570 /// qualifiers at a different level. 571 bool hasLocalQualifiers() const { 572 return getLocalFastQualifiers() || hasLocalNonFastQualifiers(); 573 } 574 575 /// \brief Determine whether this type has any qualifiers. 576 bool hasQualifiers() const; 577 578 /// \brief Determine whether this particular QualType instance has any 579 /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType 580 /// instance. 581 bool hasLocalNonFastQualifiers() const { 582 return Value.getPointer().is<const ExtQuals*>(); 583 } 584 585 /// \brief Retrieve the set of qualifiers local to this particular QualType 586 /// instance, not including any qualifiers acquired through typedefs or 587 /// other sugar. 588 Qualifiers getLocalQualifiers() const; 589 590 /// \brief Retrieve the set of qualifiers applied to this type. 591 Qualifiers getQualifiers() const; 592 593 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 594 /// local to this particular QualType instance, not including any qualifiers 595 /// acquired through typedefs or other sugar. 596 unsigned getLocalCVRQualifiers() const { 597 return getLocalFastQualifiers(); 598 } 599 600 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 601 /// applied to this type. 602 unsigned getCVRQualifiers() const; 603 604 bool isConstant(ASTContext& Ctx) const { 605 return QualType::isConstant(*this, Ctx); 606 } 607 608 /// \brief Determine whether this is a Plain Old Data (POD) type (C++ 3.9p10). 609 bool isPODType(ASTContext &Context) const; 610 611 /// isCXX11PODType() - Return true if this is a POD type according to the 612 /// more relaxed rules of the C++11 standard, regardless of the current 613 /// compilation's language. 614 /// (C++0x [basic.types]p9) 615 bool isCXX11PODType(ASTContext &Context) const; 616 617 /// isTrivialType - Return true if this is a trivial type 618 /// (C++0x [basic.types]p9) 619 bool isTrivialType(ASTContext &Context) const; 620 621 /// isTriviallyCopyableType - Return true if this is a trivially 622 /// copyable type (C++0x [basic.types]p9) 623 bool isTriviallyCopyableType(ASTContext &Context) const; 624 625 // Don't promise in the API that anything besides 'const' can be 626 // easily added. 627 628 /// addConst - add the specified type qualifier to this QualType. 629 void addConst() { 630 addFastQualifiers(Qualifiers::Const); 631 } 632 QualType withConst() const { 633 return withFastQualifiers(Qualifiers::Const); 634 } 635 636 /// addVolatile - add the specified type qualifier to this QualType. 637 void addVolatile() { 638 addFastQualifiers(Qualifiers::Volatile); 639 } 640 QualType withVolatile() const { 641 return withFastQualifiers(Qualifiers::Volatile); 642 } 643 644 QualType withCVRQualifiers(unsigned CVR) const { 645 return withFastQualifiers(CVR); 646 } 647 648 void addFastQualifiers(unsigned TQs) { 649 assert(!(TQs & ~Qualifiers::FastMask) 650 && "non-fast qualifier bits set in mask!"); 651 Value.setInt(Value.getInt() | TQs); 652 } 653 654 void removeLocalConst(); 655 void removeLocalVolatile(); 656 void removeLocalRestrict(); 657 void removeLocalCVRQualifiers(unsigned Mask); 658 659 void removeLocalFastQualifiers() { Value.setInt(0); } 660 void removeLocalFastQualifiers(unsigned Mask) { 661 assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers"); 662 Value.setInt(Value.getInt() & ~Mask); 663 } 664 665 // Creates a type with the given qualifiers in addition to any 666 // qualifiers already on this type. 667 QualType withFastQualifiers(unsigned TQs) const { 668 QualType T = *this; 669 T.addFastQualifiers(TQs); 670 return T; 671 } 672 673 // Creates a type with exactly the given fast qualifiers, removing 674 // any existing fast qualifiers. 675 QualType withExactLocalFastQualifiers(unsigned TQs) const { 676 return withoutLocalFastQualifiers().withFastQualifiers(TQs); 677 } 678 679 // Removes fast qualifiers, but leaves any extended qualifiers in place. 680 QualType withoutLocalFastQualifiers() const { 681 QualType T = *this; 682 T.removeLocalFastQualifiers(); 683 return T; 684 } 685 686 QualType getCanonicalType() const; 687 688 /// \brief Return this type with all of the instance-specific qualifiers 689 /// removed, but without removing any qualifiers that may have been applied 690 /// through typedefs. 691 QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); } 692 693 /// \brief Retrieve the unqualified variant of the given type, 694 /// removing as little sugar as possible. 695 /// 696 /// This routine looks through various kinds of sugar to find the 697 /// least-desugared type that is unqualified. For example, given: 698 /// 699 /// \code 700 /// typedef int Integer; 701 /// typedef const Integer CInteger; 702 /// typedef CInteger DifferenceType; 703 /// \endcode 704 /// 705 /// Executing \c getUnqualifiedType() on the type \c DifferenceType will 706 /// desugar until we hit the type \c Integer, which has no qualifiers on it. 707 /// 708 /// The resulting type might still be qualified if it's an array 709 /// type. To strip qualifiers even from within an array type, use 710 /// ASTContext::getUnqualifiedArrayType. 711 inline QualType getUnqualifiedType() const; 712 713 /// getSplitUnqualifiedType - Retrieve the unqualified variant of the 714 /// given type, removing as little sugar as possible. 715 /// 716 /// Like getUnqualifiedType(), but also returns the set of 717 /// qualifiers that were built up. 718 /// 719 /// The resulting type might still be qualified if it's an array 720 /// type. To strip qualifiers even from within an array type, use 721 /// ASTContext::getUnqualifiedArrayType. 722 inline SplitQualType getSplitUnqualifiedType() const; 723 724 /// \brief Determine whether this type is more qualified than the other 725 /// given type, requiring exact equality for non-CVR qualifiers. 726 bool isMoreQualifiedThan(QualType Other) const; 727 728 /// \brief Determine whether this type is at least as qualified as the other 729 /// given type, requiring exact equality for non-CVR qualifiers. 730 bool isAtLeastAsQualifiedAs(QualType Other) const; 731 732 QualType getNonReferenceType() const; 733 734 /// \brief Determine the type of a (typically non-lvalue) expression with the 735 /// specified result type. 736 /// 737 /// This routine should be used for expressions for which the return type is 738 /// explicitly specified (e.g., in a cast or call) and isn't necessarily 739 /// an lvalue. It removes a top-level reference (since there are no 740 /// expressions of reference type) and deletes top-level cvr-qualifiers 741 /// from non-class types (in C++) or all types (in C). 742 QualType getNonLValueExprType(ASTContext &Context) const; 743 744 /// getDesugaredType - Return the specified type with any "sugar" removed from 745 /// the type. This takes off typedefs, typeof's etc. If the outer level of 746 /// the type is already concrete, it returns it unmodified. This is similar 747 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 748 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 749 /// concrete. 750 /// 751 /// Qualifiers are left in place. 752 QualType getDesugaredType(const ASTContext &Context) const { 753 return getDesugaredType(*this, Context); 754 } 755 756 SplitQualType getSplitDesugaredType() const { 757 return getSplitDesugaredType(*this); 758 } 759 760 /// IgnoreParens - Returns the specified type after dropping any 761 /// outer-level parentheses. 762 QualType IgnoreParens() const { 763 if (isa<ParenType>(*this)) 764 return QualType::IgnoreParens(*this); 765 return *this; 766 } 767 768 /// operator==/!= - Indicate whether the specified types and qualifiers are 769 /// identical. 770 friend bool operator==(const QualType &LHS, const QualType &RHS) { 771 return LHS.Value == RHS.Value; 772 } 773 friend bool operator!=(const QualType &LHS, const QualType &RHS) { 774 return LHS.Value != RHS.Value; 775 } 776 std::string getAsString() const { 777 return getAsString(split()); 778 } 779 static std::string getAsString(SplitQualType split) { 780 return getAsString(split.first, split.second); 781 } 782 static std::string getAsString(const Type *ty, Qualifiers qs); 783 784 std::string getAsString(const PrintingPolicy &Policy) const { 785 std::string S; 786 getAsStringInternal(S, Policy); 787 return S; 788 } 789 void getAsStringInternal(std::string &Str, 790 const PrintingPolicy &Policy) const { 791 return getAsStringInternal(split(), Str, Policy); 792 } 793 static void getAsStringInternal(SplitQualType split, std::string &out, 794 const PrintingPolicy &policy) { 795 return getAsStringInternal(split.first, split.second, out, policy); 796 } 797 static void getAsStringInternal(const Type *ty, Qualifiers qs, 798 std::string &out, 799 const PrintingPolicy &policy); 800 801 void dump(const char *s) const; 802 void dump() const; 803 804 void Profile(llvm::FoldingSetNodeID &ID) const { 805 ID.AddPointer(getAsOpaquePtr()); 806 } 807 808 /// getAddressSpace - Return the address space of this type. 809 inline unsigned getAddressSpace() const; 810 811 /// getObjCGCAttr - Returns gc attribute of this type. 812 inline Qualifiers::GC getObjCGCAttr() const; 813 814 /// isObjCGCWeak true when Type is objc's weak. 815 bool isObjCGCWeak() const { 816 return getObjCGCAttr() == Qualifiers::Weak; 817 } 818 819 /// isObjCGCStrong true when Type is objc's strong. 820 bool isObjCGCStrong() const { 821 return getObjCGCAttr() == Qualifiers::Strong; 822 } 823 824 /// getObjCLifetime - Returns lifetime attribute of this type. 825 Qualifiers::ObjCLifetime getObjCLifetime() const { 826 return getQualifiers().getObjCLifetime(); 827 } 828 829 bool hasNonTrivialObjCLifetime() const { 830 return getQualifiers().hasNonTrivialObjCLifetime(); 831 } 832 833 bool hasStrongOrWeakObjCLifetime() const { 834 return getQualifiers().hasStrongOrWeakObjCLifetime(); 835 } 836 837 enum DestructionKind { 838 DK_none, 839 DK_cxx_destructor, 840 DK_objc_strong_lifetime, 841 DK_objc_weak_lifetime 842 }; 843 844 /// isDestructedType - nonzero if objects of this type require 845 /// non-trivial work to clean up after. Non-zero because it's 846 /// conceivable that qualifiers (objc_gc(weak)?) could make 847 /// something require destruction. 848 DestructionKind isDestructedType() const { 849 return isDestructedTypeImpl(*this); 850 } 851 852 /// \brief Determine whether expressions of the given type are forbidden 853 /// from being lvalues in C. 854 /// 855 /// The expression types that are forbidden to be lvalues are: 856 /// - 'void', but not qualified void 857 /// - function types 858 /// 859 /// The exact rule here is C99 6.3.2.1: 860 /// An lvalue is an expression with an object type or an incomplete 861 /// type other than void. 862 bool isCForbiddenLValueType() const; 863 864 /// \brief Determine whether this type has trivial copy-assignment semantics. 865 bool hasTrivialCopyAssignment(ASTContext &Context) const; 866 867private: 868 // These methods are implemented in a separate translation unit; 869 // "static"-ize them to avoid creating temporary QualTypes in the 870 // caller. 871 static bool isConstant(QualType T, ASTContext& Ctx); 872 static QualType getDesugaredType(QualType T, const ASTContext &Context); 873 static SplitQualType getSplitDesugaredType(QualType T); 874 static SplitQualType getSplitUnqualifiedTypeImpl(QualType type); 875 static QualType IgnoreParens(QualType T); 876 static DestructionKind isDestructedTypeImpl(QualType type); 877}; 878 879} // end clang. 880 881namespace llvm { 882/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 883/// to a specific Type class. 884template<> struct simplify_type<const ::clang::QualType> { 885 typedef const ::clang::Type *SimpleType; 886 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 887 return Val.getTypePtr(); 888 } 889}; 890template<> struct simplify_type< ::clang::QualType> 891 : public simplify_type<const ::clang::QualType> {}; 892 893// Teach SmallPtrSet that QualType is "basically a pointer". 894template<> 895class PointerLikeTypeTraits<clang::QualType> { 896public: 897 static inline void *getAsVoidPointer(clang::QualType P) { 898 return P.getAsOpaquePtr(); 899 } 900 static inline clang::QualType getFromVoidPointer(void *P) { 901 return clang::QualType::getFromOpaquePtr(P); 902 } 903 // Various qualifiers go in low bits. 904 enum { NumLowBitsAvailable = 0 }; 905}; 906 907} // end namespace llvm 908 909namespace clang { 910 911/// \brief Base class that is common to both the \c ExtQuals and \c Type 912/// classes, which allows \c QualType to access the common fields between the 913/// two. 914/// 915class ExtQualsTypeCommonBase { 916 ExtQualsTypeCommonBase(const Type *baseType, QualType canon) 917 : BaseType(baseType), CanonicalType(canon) {} 918 919 /// \brief The "base" type of an extended qualifiers type (\c ExtQuals) or 920 /// a self-referential pointer (for \c Type). 921 /// 922 /// This pointer allows an efficient mapping from a QualType to its 923 /// underlying type pointer. 924 const Type *const BaseType; 925 926 /// \brief The canonical type of this type. A QualType. 927 QualType CanonicalType; 928 929 friend class QualType; 930 friend class Type; 931 friend class ExtQuals; 932}; 933 934/// ExtQuals - We can encode up to four bits in the low bits of a 935/// type pointer, but there are many more type qualifiers that we want 936/// to be able to apply to an arbitrary type. Therefore we have this 937/// struct, intended to be heap-allocated and used by QualType to 938/// store qualifiers. 939/// 940/// The current design tags the 'const', 'restrict', and 'volatile' qualifiers 941/// in three low bits on the QualType pointer; a fourth bit records whether 942/// the pointer is an ExtQuals node. The extended qualifiers (address spaces, 943/// Objective-C GC attributes) are much more rare. 944class ExtQuals : public ExtQualsTypeCommonBase, public llvm::FoldingSetNode { 945 // NOTE: changing the fast qualifiers should be straightforward as 946 // long as you don't make 'const' non-fast. 947 // 1. Qualifiers: 948 // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). 949 // Fast qualifiers must occupy the low-order bits. 950 // b) Update Qualifiers::FastWidth and FastMask. 951 // 2. QualType: 952 // a) Update is{Volatile,Restrict}Qualified(), defined inline. 953 // b) Update remove{Volatile,Restrict}, defined near the end of 954 // this header. 955 // 3. ASTContext: 956 // a) Update get{Volatile,Restrict}Type. 957 958 /// Quals - the immutable set of qualifiers applied by this 959 /// node; always contains extended qualifiers. 960 Qualifiers Quals; 961 962 ExtQuals *this_() { return this; } 963 964public: 965 ExtQuals(const Type *baseType, QualType canon, Qualifiers quals) 966 : ExtQualsTypeCommonBase(baseType, 967 canon.isNull() ? QualType(this_(), 0) : canon), 968 Quals(quals) 969 { 970 assert(Quals.hasNonFastQualifiers() 971 && "ExtQuals created with no fast qualifiers"); 972 assert(!Quals.hasFastQualifiers() 973 && "ExtQuals created with fast qualifiers"); 974 } 975 976 Qualifiers getQualifiers() const { return Quals; } 977 978 bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } 979 Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } 980 981 bool hasObjCLifetime() const { return Quals.hasObjCLifetime(); } 982 Qualifiers::ObjCLifetime getObjCLifetime() const { 983 return Quals.getObjCLifetime(); 984 } 985 986 bool hasAddressSpace() const { return Quals.hasAddressSpace(); } 987 unsigned getAddressSpace() const { return Quals.getAddressSpace(); } 988 989 const Type *getBaseType() const { return BaseType; } 990 991public: 992 void Profile(llvm::FoldingSetNodeID &ID) const { 993 Profile(ID, getBaseType(), Quals); 994 } 995 static void Profile(llvm::FoldingSetNodeID &ID, 996 const Type *BaseType, 997 Qualifiers Quals) { 998 assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!"); 999 ID.AddPointer(BaseType); 1000 Quals.Profile(ID); 1001 } 1002}; 1003 1004/// \brief The kind of C++0x ref-qualifier associated with a function type, 1005/// which determines whether a member function's "this" object can be an 1006/// lvalue, rvalue, or neither. 1007enum RefQualifierKind { 1008 /// \brief No ref-qualifier was provided. 1009 RQ_None = 0, 1010 /// \brief An lvalue ref-qualifier was provided (\c &). 1011 RQ_LValue, 1012 /// \brief An rvalue ref-qualifier was provided (\c &&). 1013 RQ_RValue 1014}; 1015 1016/// Type - This is the base class of the type hierarchy. A central concept 1017/// with types is that each type always has a canonical type. A canonical type 1018/// is the type with any typedef names stripped out of it or the types it 1019/// references. For example, consider: 1020/// 1021/// typedef int foo; 1022/// typedef foo* bar; 1023/// 'int *' 'foo *' 'bar' 1024/// 1025/// There will be a Type object created for 'int'. Since int is canonical, its 1026/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 1027/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 1028/// there is a PointerType that represents 'int*', which, like 'int', is 1029/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 1030/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 1031/// is also 'int*'. 1032/// 1033/// Non-canonical types are useful for emitting diagnostics, without losing 1034/// information about typedefs being used. Canonical types are useful for type 1035/// comparisons (they allow by-pointer equality tests) and useful for reasoning 1036/// about whether something has a particular form (e.g. is a function type), 1037/// because they implicitly, recursively, strip all typedefs out of a type. 1038/// 1039/// Types, once created, are immutable. 1040/// 1041class Type : public ExtQualsTypeCommonBase { 1042public: 1043 enum TypeClass { 1044#define TYPE(Class, Base) Class, 1045#define LAST_TYPE(Class) TypeLast = Class, 1046#define ABSTRACT_TYPE(Class, Base) 1047#include "clang/AST/TypeNodes.def" 1048 TagFirst = Record, TagLast = Enum 1049 }; 1050 1051private: 1052 Type(const Type&); // DO NOT IMPLEMENT. 1053 void operator=(const Type&); // DO NOT IMPLEMENT. 1054 1055 /// Bitfields required by the Type class. 1056 class TypeBitfields { 1057 friend class Type; 1058 template <class T> friend class TypePropertyCache; 1059 1060 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 1061 unsigned TC : 8; 1062 1063 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 1064 /// Note that this should stay at the end of the ivars for Type so that 1065 /// subclasses can pack their bitfields into the same word. 1066 unsigned Dependent : 1; 1067 1068 /// \brief Whether this type somehow involves a template parameter, even 1069 /// if the resolution of the type does not depend on a template parameter. 1070 unsigned InstantiationDependent : 1; 1071 1072 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 1073 unsigned VariablyModified : 1; 1074 1075 /// \brief Whether this type contains an unexpanded parameter pack 1076 /// (for C++0x variadic templates). 1077 unsigned ContainsUnexpandedParameterPack : 1; 1078 1079 /// \brief Nonzero if the cache (i.e. the bitfields here starting 1080 /// with 'Cache') is valid. If so, then this is a 1081 /// LangOptions::VisibilityMode+1. 1082 mutable unsigned CacheValidAndVisibility : 2; 1083 1084 /// \brief Linkage of this type. 1085 mutable unsigned CachedLinkage : 2; 1086 1087 /// \brief Whether this type involves and local or unnamed types. 1088 mutable unsigned CachedLocalOrUnnamed : 1; 1089 1090 /// \brief FromAST - Whether this type comes from an AST file. 1091 mutable unsigned FromAST : 1; 1092 1093 bool isCacheValid() const { 1094 return (CacheValidAndVisibility != 0); 1095 } 1096 Visibility getVisibility() const { 1097 assert(isCacheValid() && "getting linkage from invalid cache"); 1098 return static_cast<Visibility>(CacheValidAndVisibility-1); 1099 } 1100 Linkage getLinkage() const { 1101 assert(isCacheValid() && "getting linkage from invalid cache"); 1102 return static_cast<Linkage>(CachedLinkage); 1103 } 1104 bool hasLocalOrUnnamedType() const { 1105 assert(isCacheValid() && "getting linkage from invalid cache"); 1106 return CachedLocalOrUnnamed; 1107 } 1108 }; 1109 enum { NumTypeBits = 18 }; 1110 1111protected: 1112 // These classes allow subclasses to somewhat cleanly pack bitfields 1113 // into Type. 1114 1115 class ArrayTypeBitfields { 1116 friend class ArrayType; 1117 1118 unsigned : NumTypeBits; 1119 1120 /// IndexTypeQuals - CVR qualifiers from declarations like 1121 /// 'int X[static restrict 4]'. For function parameters only. 1122 unsigned IndexTypeQuals : 3; 1123 1124 /// SizeModifier - storage class qualifiers from declarations like 1125 /// 'int X[static restrict 4]'. For function parameters only. 1126 /// Actually an ArrayType::ArraySizeModifier. 1127 unsigned SizeModifier : 3; 1128 }; 1129 1130 class BuiltinTypeBitfields { 1131 friend class BuiltinType; 1132 1133 unsigned : NumTypeBits; 1134 1135 /// The kind (BuiltinType::Kind) of builtin type this is. 1136 unsigned Kind : 8; 1137 }; 1138 1139 class FunctionTypeBitfields { 1140 friend class FunctionType; 1141 1142 unsigned : NumTypeBits; 1143 1144 /// Extra information which affects how the function is called, like 1145 /// regparm and the calling convention. 1146 unsigned ExtInfo : 8; 1147 1148 /// Whether the function is variadic. Only used by FunctionProtoType. 1149 unsigned Variadic : 1; 1150 1151 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1152 /// other bitfields. 1153 /// The qualifiers are part of FunctionProtoType because... 1154 /// 1155 /// C++ 8.3.5p4: The return type, the parameter type list and the 1156 /// cv-qualifier-seq, [...], are part of the function type. 1157 unsigned TypeQuals : 3; 1158 1159 /// \brief The ref-qualifier associated with a \c FunctionProtoType. 1160 /// 1161 /// This is a value of type \c RefQualifierKind. 1162 unsigned RefQualifier : 2; 1163 }; 1164 1165 class ObjCObjectTypeBitfields { 1166 friend class ObjCObjectType; 1167 1168 unsigned : NumTypeBits; 1169 1170 /// NumProtocols - The number of protocols stored directly on this 1171 /// object type. 1172 unsigned NumProtocols : 32 - NumTypeBits; 1173 }; 1174 1175 class ReferenceTypeBitfields { 1176 friend class ReferenceType; 1177 1178 unsigned : NumTypeBits; 1179 1180 /// True if the type was originally spelled with an lvalue sigil. 1181 /// This is never true of rvalue references but can also be false 1182 /// on lvalue references because of C++0x [dcl.typedef]p9, 1183 /// as follows: 1184 /// 1185 /// typedef int &ref; // lvalue, spelled lvalue 1186 /// typedef int &&rvref; // rvalue 1187 /// ref &a; // lvalue, inner ref, spelled lvalue 1188 /// ref &&a; // lvalue, inner ref 1189 /// rvref &a; // lvalue, inner ref, spelled lvalue 1190 /// rvref &&a; // rvalue, inner ref 1191 unsigned SpelledAsLValue : 1; 1192 1193 /// True if the inner type is a reference type. This only happens 1194 /// in non-canonical forms. 1195 unsigned InnerRef : 1; 1196 }; 1197 1198 class TypeWithKeywordBitfields { 1199 friend class TypeWithKeyword; 1200 1201 unsigned : NumTypeBits; 1202 1203 /// An ElaboratedTypeKeyword. 8 bits for efficient access. 1204 unsigned Keyword : 8; 1205 }; 1206 1207 class VectorTypeBitfields { 1208 friend class VectorType; 1209 1210 unsigned : NumTypeBits; 1211 1212 /// VecKind - The kind of vector, either a generic vector type or some 1213 /// target-specific vector type such as for AltiVec or Neon. 1214 unsigned VecKind : 3; 1215 1216 /// NumElements - The number of elements in the vector. 1217 unsigned NumElements : 29 - NumTypeBits; 1218 }; 1219 1220 class AttributedTypeBitfields { 1221 friend class AttributedType; 1222 1223 unsigned : NumTypeBits; 1224 1225 /// AttrKind - an AttributedType::Kind 1226 unsigned AttrKind : 32 - NumTypeBits; 1227 }; 1228 1229 union { 1230 TypeBitfields TypeBits; 1231 ArrayTypeBitfields ArrayTypeBits; 1232 AttributedTypeBitfields AttributedTypeBits; 1233 BuiltinTypeBitfields BuiltinTypeBits; 1234 FunctionTypeBitfields FunctionTypeBits; 1235 ObjCObjectTypeBitfields ObjCObjectTypeBits; 1236 ReferenceTypeBitfields ReferenceTypeBits; 1237 TypeWithKeywordBitfields TypeWithKeywordBits; 1238 VectorTypeBitfields VectorTypeBits; 1239 }; 1240 1241private: 1242 /// \brief Set whether this type comes from an AST file. 1243 void setFromAST(bool V = true) const { 1244 TypeBits.FromAST = V; 1245 } 1246 1247 template <class T> friend class TypePropertyCache; 1248 1249protected: 1250 // silence VC++ warning C4355: 'this' : used in base member initializer list 1251 Type *this_() { return this; } 1252 Type(TypeClass tc, QualType canon, bool Dependent, 1253 bool InstantiationDependent, bool VariablyModified, 1254 bool ContainsUnexpandedParameterPack) 1255 : ExtQualsTypeCommonBase(this, 1256 canon.isNull() ? QualType(this_(), 0) : canon) { 1257 TypeBits.TC = tc; 1258 TypeBits.Dependent = Dependent; 1259 TypeBits.InstantiationDependent = Dependent || InstantiationDependent; 1260 TypeBits.VariablyModified = VariablyModified; 1261 TypeBits.ContainsUnexpandedParameterPack = ContainsUnexpandedParameterPack; 1262 TypeBits.CacheValidAndVisibility = 0; 1263 TypeBits.CachedLocalOrUnnamed = false; 1264 TypeBits.CachedLinkage = NoLinkage; 1265 TypeBits.FromAST = false; 1266 } 1267 friend class ASTContext; 1268 1269 void setDependent(bool D = true) { 1270 TypeBits.Dependent = D; 1271 if (D) 1272 TypeBits.InstantiationDependent = true; 1273 } 1274 void setInstantiationDependent(bool D = true) { 1275 TypeBits.InstantiationDependent = D; } 1276 void setVariablyModified(bool VM = true) { TypeBits.VariablyModified = VM; 1277 } 1278 void setContainsUnexpandedParameterPack(bool PP = true) { 1279 TypeBits.ContainsUnexpandedParameterPack = PP; 1280 } 1281 1282public: 1283 TypeClass getTypeClass() const { return static_cast<TypeClass>(TypeBits.TC); } 1284 1285 /// \brief Whether this type comes from an AST file. 1286 bool isFromAST() const { return TypeBits.FromAST; } 1287 1288 /// \brief Whether this type is or contains an unexpanded parameter 1289 /// pack, used to support C++0x variadic templates. 1290 /// 1291 /// A type that contains a parameter pack shall be expanded by the 1292 /// ellipsis operator at some point. For example, the typedef in the 1293 /// following example contains an unexpanded parameter pack 'T': 1294 /// 1295 /// \code 1296 /// template<typename ...T> 1297 /// struct X { 1298 /// typedef T* pointer_types; // ill-formed; T is a parameter pack. 1299 /// }; 1300 /// \endcode 1301 /// 1302 /// Note that this routine does not specify which 1303 bool containsUnexpandedParameterPack() const { 1304 return TypeBits.ContainsUnexpandedParameterPack; 1305 } 1306 1307 /// Determines if this type would be canonical if it had no further 1308 /// qualification. 1309 bool isCanonicalUnqualified() const { 1310 return CanonicalType == QualType(this, 0); 1311 } 1312 1313 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 1314 /// object types, function types, and incomplete types. 1315 1316 /// isIncompleteType - Return true if this is an incomplete type. 1317 /// A type that can describe objects, but which lacks information needed to 1318 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 1319 /// routine will need to determine if the size is actually required. 1320 bool isIncompleteType() const; 1321 1322 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 1323 /// type, in other words, not a function type. 1324 bool isIncompleteOrObjectType() const { 1325 return !isFunctionType(); 1326 } 1327 1328 /// \brief Determine whether this type is an object type. 1329 bool isObjectType() const { 1330 // C++ [basic.types]p8: 1331 // An object type is a (possibly cv-qualified) type that is not a 1332 // function type, not a reference type, and not a void type. 1333 return !isReferenceType() && !isFunctionType() && !isVoidType(); 1334 } 1335 1336 /// isLiteralType - Return true if this is a literal type 1337 /// (C++0x [basic.types]p10) 1338 bool isLiteralType() const; 1339 1340 /// \brief Test if this type is a standard-layout type. 1341 /// (C++0x [basic.type]p9) 1342 bool isStandardLayoutType() const; 1343 1344 /// Helper methods to distinguish type categories. All type predicates 1345 /// operate on the canonical type, ignoring typedefs and qualifiers. 1346 1347 /// isBuiltinType - returns true if the type is a builtin type. 1348 bool isBuiltinType() const; 1349 1350 /// isSpecificBuiltinType - Test for a particular builtin type. 1351 bool isSpecificBuiltinType(unsigned K) const; 1352 1353 /// isPlaceholderType - Test for a type which does not represent an 1354 /// actual type-system type but is instead used as a placeholder for 1355 /// various convenient purposes within Clang. All such types are 1356 /// BuiltinTypes. 1357 bool isPlaceholderType() const; 1358 1359 /// isSpecificPlaceholderType - Test for a specific placeholder type. 1360 bool isSpecificPlaceholderType(unsigned K) const; 1361 1362 /// isIntegerType() does *not* include complex integers (a GCC extension). 1363 /// isComplexIntegerType() can be used to test for complex integers. 1364 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 1365 bool isEnumeralType() const; 1366 bool isBooleanType() const; 1367 bool isCharType() const; 1368 bool isWideCharType() const; 1369 bool isAnyCharacterType() const; 1370 bool isIntegralType(ASTContext &Ctx) const; 1371 1372 /// \brief Determine whether this type is an integral or enumeration type. 1373 bool isIntegralOrEnumerationType() const; 1374 /// \brief Determine whether this type is an integral or unscoped enumeration 1375 /// type. 1376 bool isIntegralOrUnscopedEnumerationType() const; 1377 1378 /// Floating point categories. 1379 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 1380 /// isComplexType() does *not* include complex integers (a GCC extension). 1381 /// isComplexIntegerType() can be used to test for complex integers. 1382 bool isComplexType() const; // C99 6.2.5p11 (complex) 1383 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 1384 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 1385 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 1386 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 1387 bool isVoidType() const; // C99 6.2.5p19 1388 bool isDerivedType() const; // C99 6.2.5p20 1389 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 1390 bool isAggregateType() const; 1391 bool isFundamentalType() const; 1392 bool isCompoundType() const; 1393 1394 // Type Predicates: Check to see if this type is structurally the specified 1395 // type, ignoring typedefs and qualifiers. 1396 bool isFunctionType() const; 1397 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 1398 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 1399 bool isPointerType() const; 1400 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 1401 bool isBlockPointerType() const; 1402 bool isVoidPointerType() const; 1403 bool isReferenceType() const; 1404 bool isLValueReferenceType() const; 1405 bool isRValueReferenceType() const; 1406 bool isFunctionPointerType() const; 1407 bool isMemberPointerType() const; 1408 bool isMemberFunctionPointerType() const; 1409 bool isMemberDataPointerType() const; 1410 bool isArrayType() const; 1411 bool isConstantArrayType() const; 1412 bool isIncompleteArrayType() const; 1413 bool isVariableArrayType() const; 1414 bool isDependentSizedArrayType() const; 1415 bool isRecordType() const; 1416 bool isClassType() const; 1417 bool isStructureType() const; 1418 bool isStructureOrClassType() const; 1419 bool isUnionType() const; 1420 bool isComplexIntegerType() const; // GCC _Complex integer type. 1421 bool isVectorType() const; // GCC vector type. 1422 bool isExtVectorType() const; // Extended vector type. 1423 bool isObjCObjectPointerType() const; // pointer to ObjC object 1424 bool isObjCRetainableType() const; // ObjC object or block pointer 1425 bool isObjCLifetimeType() const; // (array of)* retainable type 1426 bool isObjCIndirectLifetimeType() const; // (pointer to)* lifetime type 1427 bool isObjCNSObjectType() const; // __attribute__((NSObject)) 1428 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 1429 // for the common case. 1430 bool isObjCObjectType() const; // NSString or typeof(*(id)0) 1431 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 1432 bool isObjCQualifiedIdType() const; // id<foo> 1433 bool isObjCQualifiedClassType() const; // Class<foo> 1434 bool isObjCObjectOrInterfaceType() const; 1435 bool isObjCIdType() const; // id 1436 bool isObjCClassType() const; // Class 1437 bool isObjCSelType() const; // Class 1438 bool isObjCBuiltinType() const; // 'id' or 'Class' 1439 bool isObjCARCBridgableType() const; 1440 bool isCARCBridgableType() const; 1441 bool isTemplateTypeParmType() const; // C++ template type parameter 1442 bool isNullPtrType() const; // C++0x nullptr_t 1443 1444 /// Determines if this type, which must satisfy 1445 /// isObjCLifetimeType(), is implicitly __unsafe_unretained rather 1446 /// than implicitly __strong. 1447 bool isObjCARCImplicitlyUnretainedType() const; 1448 1449 /// Return the implicit lifetime for this type, which must not be dependent. 1450 Qualifiers::ObjCLifetime getObjCARCImplicitLifetime() const; 1451 1452 enum ScalarTypeKind { 1453 STK_Pointer, 1454 STK_MemberPointer, 1455 STK_Bool, 1456 STK_Integral, 1457 STK_Floating, 1458 STK_IntegralComplex, 1459 STK_FloatingComplex 1460 }; 1461 /// getScalarTypeKind - Given that this is a scalar type, classify it. 1462 ScalarTypeKind getScalarTypeKind() const; 1463 1464 /// isDependentType - Whether this type is a dependent type, meaning 1465 /// that its definition somehow depends on a template parameter 1466 /// (C++ [temp.dep.type]). 1467 bool isDependentType() const { return TypeBits.Dependent; } 1468 1469 /// \brief Determine whether this type is an instantiation-dependent type, 1470 /// meaning that the type involves a template parameter (even if the 1471 /// definition does not actually depend on the type substituted for that 1472 /// template parameter). 1473 bool isInstantiationDependentType() const { 1474 return TypeBits.InstantiationDependent; 1475 } 1476 1477 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 1478 bool isVariablyModifiedType() const { return TypeBits.VariablyModified; } 1479 1480 /// \brief Whether this type involves a variable-length array type 1481 /// with a definite size. 1482 bool hasSizedVLAType() const; 1483 1484 /// \brief Whether this type is or contains a local or unnamed type. 1485 bool hasUnnamedOrLocalType() const; 1486 1487 bool isOverloadableType() const; 1488 1489 /// \brief Determine wither this type is a C++ elaborated-type-specifier. 1490 bool isElaboratedTypeSpecifier() const; 1491 1492 bool canDecayToPointerType() const; 1493 1494 /// hasPointerRepresentation - Whether this type is represented 1495 /// natively as a pointer; this includes pointers, references, block 1496 /// pointers, and Objective-C interface, qualified id, and qualified 1497 /// interface types, as well as nullptr_t. 1498 bool hasPointerRepresentation() const; 1499 1500 /// hasObjCPointerRepresentation - Whether this type can represent 1501 /// an objective pointer type for the purpose of GC'ability 1502 bool hasObjCPointerRepresentation() const; 1503 1504 /// \brief Determine whether this type has an integer representation 1505 /// of some sort, e.g., it is an integer type or a vector. 1506 bool hasIntegerRepresentation() const; 1507 1508 /// \brief Determine whether this type has an signed integer representation 1509 /// of some sort, e.g., it is an signed integer type or a vector. 1510 bool hasSignedIntegerRepresentation() const; 1511 1512 /// \brief Determine whether this type has an unsigned integer representation 1513 /// of some sort, e.g., it is an unsigned integer type or a vector. 1514 bool hasUnsignedIntegerRepresentation() const; 1515 1516 /// \brief Determine whether this type has a floating-point representation 1517 /// of some sort, e.g., it is a floating-point type or a vector thereof. 1518 bool hasFloatingRepresentation() const; 1519 1520 // Type Checking Functions: Check to see if this type is structurally the 1521 // specified type, ignoring typedefs and qualifiers, and return a pointer to 1522 // the best type we can. 1523 const RecordType *getAsStructureType() const; 1524 /// NOTE: getAs*ArrayType are methods on ASTContext. 1525 const RecordType *getAsUnionType() const; 1526 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 1527 // The following is a convenience method that returns an ObjCObjectPointerType 1528 // for object declared using an interface. 1529 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 1530 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 1531 const ObjCObjectPointerType *getAsObjCQualifiedClassType() const; 1532 const ObjCObjectType *getAsObjCQualifiedInterfaceType() const; 1533 const CXXRecordDecl *getCXXRecordDeclForPointerType() const; 1534 1535 /// \brief Retrieves the CXXRecordDecl that this type refers to, either 1536 /// because the type is a RecordType or because it is the injected-class-name 1537 /// type of a class template or class template partial specialization. 1538 CXXRecordDecl *getAsCXXRecordDecl() const; 1539 1540 /// \brief Get the AutoType whose type will be deduced for a variable with 1541 /// an initializer of this type. This looks through declarators like pointer 1542 /// types, but not through decltype or typedefs. 1543 AutoType *getContainedAutoType() const; 1544 1545 /// Member-template getAs<specific type>'. Look through sugar for 1546 /// an instance of <specific type>. This scheme will eventually 1547 /// replace the specific getAsXXXX methods above. 1548 /// 1549 /// There are some specializations of this member template listed 1550 /// immediately following this class. 1551 template <typename T> const T *getAs() const; 1552 1553 /// A variant of getAs<> for array types which silently discards 1554 /// qualifiers from the outermost type. 1555 const ArrayType *getAsArrayTypeUnsafe() const; 1556 1557 /// Member-template castAs<specific type>. Look through sugar for 1558 /// the underlying instance of <specific type>. 1559 /// 1560 /// This method has the same relationship to getAs<T> as cast<T> has 1561 /// to dyn_cast<T>; which is to say, the underlying type *must* 1562 /// have the intended type, and this method will never return null. 1563 template <typename T> const T *castAs() const; 1564 1565 /// A variant of castAs<> for array type which silently discards 1566 /// qualifiers from the outermost type. 1567 const ArrayType *castAsArrayTypeUnsafe() const; 1568 1569 /// getBaseElementTypeUnsafe - Get the base element type of this 1570 /// type, potentially discarding type qualifiers. This method 1571 /// should never be used when type qualifiers are meaningful. 1572 const Type *getBaseElementTypeUnsafe() const; 1573 1574 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 1575 /// element type of the array, potentially with type qualifiers missing. 1576 /// This method should never be used when type qualifiers are meaningful. 1577 const Type *getArrayElementTypeNoTypeQual() const; 1578 1579 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 1580 /// pointer, this returns the respective pointee. 1581 QualType getPointeeType() const; 1582 1583 /// getUnqualifiedDesugaredType() - Return the specified type with 1584 /// any "sugar" removed from the type, removing any typedefs, 1585 /// typeofs, etc., as well as any qualifiers. 1586 const Type *getUnqualifiedDesugaredType() const; 1587 1588 /// More type predicates useful for type checking/promotion 1589 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 1590 1591 /// isSignedIntegerType - Return true if this is an integer type that is 1592 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 1593 /// or an enum decl which has a signed representation. 1594 bool isSignedIntegerType() const; 1595 1596 /// isUnsignedIntegerType - Return true if this is an integer type that is 1597 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], 1598 /// or an enum decl which has an unsigned representation. 1599 bool isUnsignedIntegerType() const; 1600 1601 /// Determines whether this is an integer type that is signed or an 1602 /// enumeration types whose underlying type is a signed integer type. 1603 bool isSignedIntegerOrEnumerationType() const; 1604 1605 /// Determines whether this is an integer type that is unsigned or an 1606 /// enumeration types whose underlying type is a unsigned integer type. 1607 bool isUnsignedIntegerOrEnumerationType() const; 1608 1609 /// isConstantSizeType - Return true if this is not a variable sized type, 1610 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 1611 /// incomplete types. 1612 bool isConstantSizeType() const; 1613 1614 /// isSpecifierType - Returns true if this type can be represented by some 1615 /// set of type specifiers. 1616 bool isSpecifierType() const; 1617 1618 /// \brief Determine the linkage of this type. 1619 Linkage getLinkage() const; 1620 1621 /// \brief Determine the visibility of this type. 1622 Visibility getVisibility() const; 1623 1624 /// \brief Determine the linkage and visibility of this type. 1625 std::pair<Linkage,Visibility> getLinkageAndVisibility() const; 1626 1627 /// \brief Note that the linkage is no longer known. 1628 void ClearLinkageCache(); 1629 1630 const char *getTypeClassName() const; 1631 1632 QualType getCanonicalTypeInternal() const { 1633 return CanonicalType; 1634 } 1635 CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h 1636 void dump() const; 1637 1638 static bool classof(const Type *) { return true; } 1639 1640 friend class ASTReader; 1641 friend class ASTWriter; 1642}; 1643 1644template <> inline const TypedefType *Type::getAs() const { 1645 return dyn_cast<TypedefType>(this); 1646} 1647 1648// We can do canonical leaf types faster, because we don't have to 1649// worry about preserving child type decoration. 1650#define TYPE(Class, Base) 1651#define LEAF_TYPE(Class) \ 1652template <> inline const Class##Type *Type::getAs() const { \ 1653 return dyn_cast<Class##Type>(CanonicalType); \ 1654} \ 1655template <> inline const Class##Type *Type::castAs() const { \ 1656 return cast<Class##Type>(CanonicalType); \ 1657} 1658#include "clang/AST/TypeNodes.def" 1659 1660 1661/// BuiltinType - This class is used for builtin types like 'int'. Builtin 1662/// types are always canonical and have a literal name field. 1663class BuiltinType : public Type { 1664public: 1665 enum Kind { 1666 Void, 1667 1668 Bool, // This is bool and/or _Bool. 1669 Char_U, // This is 'char' for targets where char is unsigned. 1670 UChar, // This is explicitly qualified unsigned char. 1671 WChar_U, // This is 'wchar_t' for C++, when unsigned. 1672 Char16, // This is 'char16_t' for C++. 1673 Char32, // This is 'char32_t' for C++. 1674 UShort, 1675 UInt, 1676 ULong, 1677 ULongLong, 1678 UInt128, // __uint128_t 1679 1680 Char_S, // This is 'char' for targets where char is signed. 1681 SChar, // This is explicitly qualified signed char. 1682 WChar_S, // This is 'wchar_t' for C++, when signed. 1683 Short, 1684 Int, 1685 Long, 1686 LongLong, 1687 Int128, // __int128_t 1688 1689 Float, Double, LongDouble, 1690 1691 NullPtr, // This is the type of C++0x 'nullptr'. 1692 1693 /// The primitive Objective C 'id' type. The user-visible 'id' 1694 /// type is a typedef of an ObjCObjectPointerType to an 1695 /// ObjCObjectType with this as its base. In fact, this only ever 1696 /// shows up in an AST as the base type of an ObjCObjectType. 1697 ObjCId, 1698 1699 /// The primitive Objective C 'Class' type. The user-visible 1700 /// 'Class' type is a typedef of an ObjCObjectPointerType to an 1701 /// ObjCObjectType with this as its base. In fact, this only ever 1702 /// shows up in an AST as the base type of an ObjCObjectType. 1703 ObjCClass, 1704 1705 /// The primitive Objective C 'SEL' type. The user-visible 'SEL' 1706 /// type is a typedef of a PointerType to this. 1707 ObjCSel, 1708 1709 /// This represents the type of an expression whose type is 1710 /// totally unknown, e.g. 'T::foo'. It is permitted for this to 1711 /// appear in situations where the structure of the type is 1712 /// theoretically deducible. 1713 Dependent, 1714 1715 /// The type of an unresolved overload set. A placeholder type. 1716 /// Expressions with this type have one of the following basic 1717 /// forms, with parentheses generally permitted: 1718 /// foo # possibly qualified, not if an implicit access 1719 /// foo # possibly qualified, not if an implicit access 1720 /// &foo # possibly qualified, not if an implicit access 1721 /// x->foo # only if might be a static member function 1722 /// &x->foo # only if might be a static member function 1723 /// &Class::foo # when a pointer-to-member; sub-expr also has this type 1724 /// OverloadExpr::find can be used to analyze the expression. 1725 Overload, 1726 1727 /// The type of a bound C++ non-static member function. 1728 /// A placeholder type. Expressions with this type have one of the 1729 /// following basic forms: 1730 /// foo # if an implicit access 1731 /// x->foo # if only contains non-static members 1732 BoundMember, 1733 1734 /// __builtin_any_type. A placeholder type. Useful for clients 1735 /// like debuggers that don't know what type to give something. 1736 /// Only a small number of operations are valid on expressions of 1737 /// unknown type, most notably explicit casts. 1738 UnknownAny 1739 }; 1740 1741public: 1742 BuiltinType(Kind K) 1743 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent), 1744 /*InstantiationDependent=*/(K == Dependent), 1745 /*VariablyModified=*/false, 1746 /*Unexpanded paramter pack=*/false) { 1747 BuiltinTypeBits.Kind = K; 1748 } 1749 1750 Kind getKind() const { return static_cast<Kind>(BuiltinTypeBits.Kind); } 1751 const char *getName(const LangOptions &LO) const; 1752 1753 bool isSugared() const { return false; } 1754 QualType desugar() const { return QualType(this, 0); } 1755 1756 bool isInteger() const { 1757 return getKind() >= Bool && getKind() <= Int128; 1758 } 1759 1760 bool isSignedInteger() const { 1761 return getKind() >= Char_S && getKind() <= Int128; 1762 } 1763 1764 bool isUnsignedInteger() const { 1765 return getKind() >= Bool && getKind() <= UInt128; 1766 } 1767 1768 bool isFloatingPoint() const { 1769 return getKind() >= Float && getKind() <= LongDouble; 1770 } 1771 1772 /// Determines whether this type is a placeholder type, i.e. a type 1773 /// which cannot appear in arbitrary positions in a fully-formed 1774 /// expression. 1775 bool isPlaceholderType() const { 1776 return getKind() >= Overload; 1777 } 1778 1779 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1780 static bool classof(const BuiltinType *) { return true; } 1781}; 1782 1783/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1784/// types (_Complex float etc) as well as the GCC integer complex extensions. 1785/// 1786class ComplexType : public Type, public llvm::FoldingSetNode { 1787 QualType ElementType; 1788 ComplexType(QualType Element, QualType CanonicalPtr) : 1789 Type(Complex, CanonicalPtr, Element->isDependentType(), 1790 Element->isInstantiationDependentType(), 1791 Element->isVariablyModifiedType(), 1792 Element->containsUnexpandedParameterPack()), 1793 ElementType(Element) { 1794 } 1795 friend class ASTContext; // ASTContext creates these. 1796 1797public: 1798 QualType getElementType() const { return ElementType; } 1799 1800 bool isSugared() const { return false; } 1801 QualType desugar() const { return QualType(this, 0); } 1802 1803 void Profile(llvm::FoldingSetNodeID &ID) { 1804 Profile(ID, getElementType()); 1805 } 1806 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1807 ID.AddPointer(Element.getAsOpaquePtr()); 1808 } 1809 1810 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1811 static bool classof(const ComplexType *) { return true; } 1812}; 1813 1814/// ParenType - Sugar for parentheses used when specifying types. 1815/// 1816class ParenType : public Type, public llvm::FoldingSetNode { 1817 QualType Inner; 1818 1819 ParenType(QualType InnerType, QualType CanonType) : 1820 Type(Paren, CanonType, InnerType->isDependentType(), 1821 InnerType->isInstantiationDependentType(), 1822 InnerType->isVariablyModifiedType(), 1823 InnerType->containsUnexpandedParameterPack()), 1824 Inner(InnerType) { 1825 } 1826 friend class ASTContext; // ASTContext creates these. 1827 1828public: 1829 1830 QualType getInnerType() const { return Inner; } 1831 1832 bool isSugared() const { return true; } 1833 QualType desugar() const { return getInnerType(); } 1834 1835 void Profile(llvm::FoldingSetNodeID &ID) { 1836 Profile(ID, getInnerType()); 1837 } 1838 static void Profile(llvm::FoldingSetNodeID &ID, QualType Inner) { 1839 Inner.Profile(ID); 1840 } 1841 1842 static bool classof(const Type *T) { return T->getTypeClass() == Paren; } 1843 static bool classof(const ParenType *) { return true; } 1844}; 1845 1846/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1847/// 1848class PointerType : public Type, public llvm::FoldingSetNode { 1849 QualType PointeeType; 1850 1851 PointerType(QualType Pointee, QualType CanonicalPtr) : 1852 Type(Pointer, CanonicalPtr, Pointee->isDependentType(), 1853 Pointee->isInstantiationDependentType(), 1854 Pointee->isVariablyModifiedType(), 1855 Pointee->containsUnexpandedParameterPack()), 1856 PointeeType(Pointee) { 1857 } 1858 friend class ASTContext; // ASTContext creates these. 1859 1860public: 1861 1862 QualType getPointeeType() const { return PointeeType; } 1863 1864 bool isSugared() const { return false; } 1865 QualType desugar() const { return QualType(this, 0); } 1866 1867 void Profile(llvm::FoldingSetNodeID &ID) { 1868 Profile(ID, getPointeeType()); 1869 } 1870 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1871 ID.AddPointer(Pointee.getAsOpaquePtr()); 1872 } 1873 1874 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1875 static bool classof(const PointerType *) { return true; } 1876}; 1877 1878/// BlockPointerType - pointer to a block type. 1879/// This type is to represent types syntactically represented as 1880/// "void (^)(int)", etc. Pointee is required to always be a function type. 1881/// 1882class BlockPointerType : public Type, public llvm::FoldingSetNode { 1883 QualType PointeeType; // Block is some kind of pointer type 1884 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1885 Type(BlockPointer, CanonicalCls, Pointee->isDependentType(), 1886 Pointee->isInstantiationDependentType(), 1887 Pointee->isVariablyModifiedType(), 1888 Pointee->containsUnexpandedParameterPack()), 1889 PointeeType(Pointee) { 1890 } 1891 friend class ASTContext; // ASTContext creates these. 1892 1893public: 1894 1895 // Get the pointee type. Pointee is required to always be a function type. 1896 QualType getPointeeType() const { return PointeeType; } 1897 1898 bool isSugared() const { return false; } 1899 QualType desugar() const { return QualType(this, 0); } 1900 1901 void Profile(llvm::FoldingSetNodeID &ID) { 1902 Profile(ID, getPointeeType()); 1903 } 1904 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1905 ID.AddPointer(Pointee.getAsOpaquePtr()); 1906 } 1907 1908 static bool classof(const Type *T) { 1909 return T->getTypeClass() == BlockPointer; 1910 } 1911 static bool classof(const BlockPointerType *) { return true; } 1912}; 1913 1914/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 1915/// 1916class ReferenceType : public Type, public llvm::FoldingSetNode { 1917 QualType PointeeType; 1918 1919protected: 1920 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 1921 bool SpelledAsLValue) : 1922 Type(tc, CanonicalRef, Referencee->isDependentType(), 1923 Referencee->isInstantiationDependentType(), 1924 Referencee->isVariablyModifiedType(), 1925 Referencee->containsUnexpandedParameterPack()), 1926 PointeeType(Referencee) 1927 { 1928 ReferenceTypeBits.SpelledAsLValue = SpelledAsLValue; 1929 ReferenceTypeBits.InnerRef = Referencee->isReferenceType(); 1930 } 1931 1932public: 1933 bool isSpelledAsLValue() const { return ReferenceTypeBits.SpelledAsLValue; } 1934 bool isInnerRef() const { return ReferenceTypeBits.InnerRef; } 1935 1936 QualType getPointeeTypeAsWritten() const { return PointeeType; } 1937 QualType getPointeeType() const { 1938 // FIXME: this might strip inner qualifiers; okay? 1939 const ReferenceType *T = this; 1940 while (T->isInnerRef()) 1941 T = T->PointeeType->castAs<ReferenceType>(); 1942 return T->PointeeType; 1943 } 1944 1945 void Profile(llvm::FoldingSetNodeID &ID) { 1946 Profile(ID, PointeeType, isSpelledAsLValue()); 1947 } 1948 static void Profile(llvm::FoldingSetNodeID &ID, 1949 QualType Referencee, 1950 bool SpelledAsLValue) { 1951 ID.AddPointer(Referencee.getAsOpaquePtr()); 1952 ID.AddBoolean(SpelledAsLValue); 1953 } 1954 1955 static bool classof(const Type *T) { 1956 return T->getTypeClass() == LValueReference || 1957 T->getTypeClass() == RValueReference; 1958 } 1959 static bool classof(const ReferenceType *) { return true; } 1960}; 1961 1962/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 1963/// 1964class LValueReferenceType : public ReferenceType { 1965 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 1966 bool SpelledAsLValue) : 1967 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 1968 {} 1969 friend class ASTContext; // ASTContext creates these 1970public: 1971 bool isSugared() const { return false; } 1972 QualType desugar() const { return QualType(this, 0); } 1973 1974 static bool classof(const Type *T) { 1975 return T->getTypeClass() == LValueReference; 1976 } 1977 static bool classof(const LValueReferenceType *) { return true; } 1978}; 1979 1980/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 1981/// 1982class RValueReferenceType : public ReferenceType { 1983 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 1984 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 1985 } 1986 friend class ASTContext; // ASTContext creates these 1987public: 1988 bool isSugared() const { return false; } 1989 QualType desugar() const { return QualType(this, 0); } 1990 1991 static bool classof(const Type *T) { 1992 return T->getTypeClass() == RValueReference; 1993 } 1994 static bool classof(const RValueReferenceType *) { return true; } 1995}; 1996 1997/// MemberPointerType - C++ 8.3.3 - Pointers to members 1998/// 1999class MemberPointerType : public Type, public llvm::FoldingSetNode { 2000 QualType PointeeType; 2001 /// The class of which the pointee is a member. Must ultimately be a 2002 /// RecordType, but could be a typedef or a template parameter too. 2003 const Type *Class; 2004 2005 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 2006 Type(MemberPointer, CanonicalPtr, 2007 Cls->isDependentType() || Pointee->isDependentType(), 2008 (Cls->isInstantiationDependentType() || 2009 Pointee->isInstantiationDependentType()), 2010 Pointee->isVariablyModifiedType(), 2011 (Cls->containsUnexpandedParameterPack() || 2012 Pointee->containsUnexpandedParameterPack())), 2013 PointeeType(Pointee), Class(Cls) { 2014 } 2015 friend class ASTContext; // ASTContext creates these. 2016 2017public: 2018 QualType getPointeeType() const { return PointeeType; } 2019 2020 /// Returns true if the member type (i.e. the pointee type) is a 2021 /// function type rather than a data-member type. 2022 bool isMemberFunctionPointer() const { 2023 return PointeeType->isFunctionProtoType(); 2024 } 2025 2026 /// Returns true if the member type (i.e. the pointee type) is a 2027 /// data type rather than a function type. 2028 bool isMemberDataPointer() const { 2029 return !PointeeType->isFunctionProtoType(); 2030 } 2031 2032 const Type *getClass() const { return Class; } 2033 2034 bool isSugared() const { return false; } 2035 QualType desugar() const { return QualType(this, 0); } 2036 2037 void Profile(llvm::FoldingSetNodeID &ID) { 2038 Profile(ID, getPointeeType(), getClass()); 2039 } 2040 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 2041 const Type *Class) { 2042 ID.AddPointer(Pointee.getAsOpaquePtr()); 2043 ID.AddPointer(Class); 2044 } 2045 2046 static bool classof(const Type *T) { 2047 return T->getTypeClass() == MemberPointer; 2048 } 2049 static bool classof(const MemberPointerType *) { return true; } 2050}; 2051 2052/// ArrayType - C99 6.7.5.2 - Array Declarators. 2053/// 2054class ArrayType : public Type, public llvm::FoldingSetNode { 2055public: 2056 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 2057 /// an array with a static size (e.g. int X[static 4]), or an array 2058 /// with a star size (e.g. int X[*]). 2059 /// 'static' is only allowed on function parameters. 2060 enum ArraySizeModifier { 2061 Normal, Static, Star 2062 }; 2063private: 2064 /// ElementType - The element type of the array. 2065 QualType ElementType; 2066 2067protected: 2068 // C++ [temp.dep.type]p1: 2069 // A type is dependent if it is... 2070 // - an array type constructed from any dependent type or whose 2071 // size is specified by a constant expression that is 2072 // value-dependent, 2073 ArrayType(TypeClass tc, QualType et, QualType can, 2074 ArraySizeModifier sm, unsigned tq, 2075 bool ContainsUnexpandedParameterPack) 2076 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray, 2077 et->isInstantiationDependentType() || tc == DependentSizedArray, 2078 (tc == VariableArray || et->isVariablyModifiedType()), 2079 ContainsUnexpandedParameterPack), 2080 ElementType(et) { 2081 ArrayTypeBits.IndexTypeQuals = tq; 2082 ArrayTypeBits.SizeModifier = sm; 2083 } 2084 2085 friend class ASTContext; // ASTContext creates these. 2086 2087public: 2088 QualType getElementType() const { return ElementType; } 2089 ArraySizeModifier getSizeModifier() const { 2090 return ArraySizeModifier(ArrayTypeBits.SizeModifier); 2091 } 2092 Qualifiers getIndexTypeQualifiers() const { 2093 return Qualifiers::fromCVRMask(getIndexTypeCVRQualifiers()); 2094 } 2095 unsigned getIndexTypeCVRQualifiers() const { 2096 return ArrayTypeBits.IndexTypeQuals; 2097 } 2098 2099 static bool classof(const Type *T) { 2100 return T->getTypeClass() == ConstantArray || 2101 T->getTypeClass() == VariableArray || 2102 T->getTypeClass() == IncompleteArray || 2103 T->getTypeClass() == DependentSizedArray; 2104 } 2105 static bool classof(const ArrayType *) { return true; } 2106}; 2107 2108/// ConstantArrayType - This class represents the canonical version of 2109/// C arrays with a specified constant size. For example, the canonical 2110/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 2111/// type is 'int' and the size is 404. 2112class ConstantArrayType : public ArrayType { 2113 llvm::APInt Size; // Allows us to unique the type. 2114 2115 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 2116 ArraySizeModifier sm, unsigned tq) 2117 : ArrayType(ConstantArray, et, can, sm, tq, 2118 et->containsUnexpandedParameterPack()), 2119 Size(size) {} 2120protected: 2121 ConstantArrayType(TypeClass tc, QualType et, QualType can, 2122 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 2123 : ArrayType(tc, et, can, sm, tq, et->containsUnexpandedParameterPack()), 2124 Size(size) {} 2125 friend class ASTContext; // ASTContext creates these. 2126public: 2127 const llvm::APInt &getSize() const { return Size; } 2128 bool isSugared() const { return false; } 2129 QualType desugar() const { return QualType(this, 0); } 2130 2131 2132 /// \brief Determine the number of bits required to address a member of 2133 // an array with the given element type and number of elements. 2134 static unsigned getNumAddressingBits(ASTContext &Context, 2135 QualType ElementType, 2136 const llvm::APInt &NumElements); 2137 2138 /// \brief Determine the maximum number of active bits that an array's size 2139 /// can require, which limits the maximum size of the array. 2140 static unsigned getMaxSizeBits(ASTContext &Context); 2141 2142 void Profile(llvm::FoldingSetNodeID &ID) { 2143 Profile(ID, getElementType(), getSize(), 2144 getSizeModifier(), getIndexTypeCVRQualifiers()); 2145 } 2146 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 2147 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 2148 unsigned TypeQuals) { 2149 ID.AddPointer(ET.getAsOpaquePtr()); 2150 ID.AddInteger(ArraySize.getZExtValue()); 2151 ID.AddInteger(SizeMod); 2152 ID.AddInteger(TypeQuals); 2153 } 2154 static bool classof(const Type *T) { 2155 return T->getTypeClass() == ConstantArray; 2156 } 2157 static bool classof(const ConstantArrayType *) { return true; } 2158}; 2159 2160/// IncompleteArrayType - This class represents C arrays with an unspecified 2161/// size. For example 'int A[]' has an IncompleteArrayType where the element 2162/// type is 'int' and the size is unspecified. 2163class IncompleteArrayType : public ArrayType { 2164 2165 IncompleteArrayType(QualType et, QualType can, 2166 ArraySizeModifier sm, unsigned tq) 2167 : ArrayType(IncompleteArray, et, can, sm, tq, 2168 et->containsUnexpandedParameterPack()) {} 2169 friend class ASTContext; // ASTContext creates these. 2170public: 2171 bool isSugared() const { return false; } 2172 QualType desugar() const { return QualType(this, 0); } 2173 2174 static bool classof(const Type *T) { 2175 return T->getTypeClass() == IncompleteArray; 2176 } 2177 static bool classof(const IncompleteArrayType *) { return true; } 2178 2179 friend class StmtIteratorBase; 2180 2181 void Profile(llvm::FoldingSetNodeID &ID) { 2182 Profile(ID, getElementType(), getSizeModifier(), 2183 getIndexTypeCVRQualifiers()); 2184 } 2185 2186 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 2187 ArraySizeModifier SizeMod, unsigned TypeQuals) { 2188 ID.AddPointer(ET.getAsOpaquePtr()); 2189 ID.AddInteger(SizeMod); 2190 ID.AddInteger(TypeQuals); 2191 } 2192}; 2193 2194/// VariableArrayType - This class represents C arrays with a specified size 2195/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 2196/// Since the size expression is an arbitrary expression, we store it as such. 2197/// 2198/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 2199/// should not be: two lexically equivalent variable array types could mean 2200/// different things, for example, these variables do not have the same type 2201/// dynamically: 2202/// 2203/// void foo(int x) { 2204/// int Y[x]; 2205/// ++x; 2206/// int Z[x]; 2207/// } 2208/// 2209class VariableArrayType : public ArrayType { 2210 /// SizeExpr - An assignment expression. VLA's are only permitted within 2211 /// a function block. 2212 Stmt *SizeExpr; 2213 /// Brackets - The left and right array brackets. 2214 SourceRange Brackets; 2215 2216 VariableArrayType(QualType et, QualType can, Expr *e, 2217 ArraySizeModifier sm, unsigned tq, 2218 SourceRange brackets) 2219 : ArrayType(VariableArray, et, can, sm, tq, 2220 et->containsUnexpandedParameterPack()), 2221 SizeExpr((Stmt*) e), Brackets(brackets) {} 2222 friend class ASTContext; // ASTContext creates these. 2223 2224public: 2225 Expr *getSizeExpr() const { 2226 // We use C-style casts instead of cast<> here because we do not wish 2227 // to have a dependency of Type.h on Stmt.h/Expr.h. 2228 return (Expr*) SizeExpr; 2229 } 2230 SourceRange getBracketsRange() const { return Brackets; } 2231 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 2232 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 2233 2234 bool isSugared() const { return false; } 2235 QualType desugar() const { return QualType(this, 0); } 2236 2237 static bool classof(const Type *T) { 2238 return T->getTypeClass() == VariableArray; 2239 } 2240 static bool classof(const VariableArrayType *) { return true; } 2241 2242 friend class StmtIteratorBase; 2243 2244 void Profile(llvm::FoldingSetNodeID &ID) { 2245 assert(0 && "Cannot unique VariableArrayTypes."); 2246 } 2247}; 2248 2249/// DependentSizedArrayType - This type represents an array type in 2250/// C++ whose size is a value-dependent expression. For example: 2251/// 2252/// \code 2253/// template<typename T, int Size> 2254/// class array { 2255/// T data[Size]; 2256/// }; 2257/// \endcode 2258/// 2259/// For these types, we won't actually know what the array bound is 2260/// until template instantiation occurs, at which point this will 2261/// become either a ConstantArrayType or a VariableArrayType. 2262class DependentSizedArrayType : public ArrayType { 2263 const ASTContext &Context; 2264 2265 /// \brief An assignment expression that will instantiate to the 2266 /// size of the array. 2267 /// 2268 /// The expression itself might be NULL, in which case the array 2269 /// type will have its size deduced from an initializer. 2270 Stmt *SizeExpr; 2271 2272 /// Brackets - The left and right array brackets. 2273 SourceRange Brackets; 2274 2275 DependentSizedArrayType(const ASTContext &Context, QualType et, QualType can, 2276 Expr *e, ArraySizeModifier sm, unsigned tq, 2277 SourceRange brackets); 2278 2279 friend class ASTContext; // ASTContext creates these. 2280 2281public: 2282 Expr *getSizeExpr() const { 2283 // We use C-style casts instead of cast<> here because we do not wish 2284 // to have a dependency of Type.h on Stmt.h/Expr.h. 2285 return (Expr*) SizeExpr; 2286 } 2287 SourceRange getBracketsRange() const { return Brackets; } 2288 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 2289 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 2290 2291 bool isSugared() const { return false; } 2292 QualType desugar() const { return QualType(this, 0); } 2293 2294 static bool classof(const Type *T) { 2295 return T->getTypeClass() == DependentSizedArray; 2296 } 2297 static bool classof(const DependentSizedArrayType *) { return true; } 2298 2299 friend class StmtIteratorBase; 2300 2301 2302 void Profile(llvm::FoldingSetNodeID &ID) { 2303 Profile(ID, Context, getElementType(), 2304 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 2305 } 2306 2307 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2308 QualType ET, ArraySizeModifier SizeMod, 2309 unsigned TypeQuals, Expr *E); 2310}; 2311 2312/// DependentSizedExtVectorType - This type represent an extended vector type 2313/// where either the type or size is dependent. For example: 2314/// @code 2315/// template<typename T, int Size> 2316/// class vector { 2317/// typedef T __attribute__((ext_vector_type(Size))) type; 2318/// } 2319/// @endcode 2320class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 2321 const ASTContext &Context; 2322 Expr *SizeExpr; 2323 /// ElementType - The element type of the array. 2324 QualType ElementType; 2325 SourceLocation loc; 2326 2327 DependentSizedExtVectorType(const ASTContext &Context, QualType ElementType, 2328 QualType can, Expr *SizeExpr, SourceLocation loc); 2329 2330 friend class ASTContext; 2331 2332public: 2333 Expr *getSizeExpr() const { return SizeExpr; } 2334 QualType getElementType() const { return ElementType; } 2335 SourceLocation getAttributeLoc() const { return loc; } 2336 2337 bool isSugared() const { return false; } 2338 QualType desugar() const { return QualType(this, 0); } 2339 2340 static bool classof(const Type *T) { 2341 return T->getTypeClass() == DependentSizedExtVector; 2342 } 2343 static bool classof(const DependentSizedExtVectorType *) { return true; } 2344 2345 void Profile(llvm::FoldingSetNodeID &ID) { 2346 Profile(ID, Context, getElementType(), getSizeExpr()); 2347 } 2348 2349 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2350 QualType ElementType, Expr *SizeExpr); 2351}; 2352 2353 2354/// VectorType - GCC generic vector type. This type is created using 2355/// __attribute__((vector_size(n)), where "n" specifies the vector size in 2356/// bytes; or from an Altivec __vector or vector declaration. 2357/// Since the constructor takes the number of vector elements, the 2358/// client is responsible for converting the size into the number of elements. 2359class VectorType : public Type, public llvm::FoldingSetNode { 2360public: 2361 enum VectorKind { 2362 GenericVector, // not a target-specific vector type 2363 AltiVecVector, // is AltiVec vector 2364 AltiVecPixel, // is AltiVec 'vector Pixel' 2365 AltiVecBool, // is AltiVec 'vector bool ...' 2366 NeonVector, // is ARM Neon vector 2367 NeonPolyVector // is ARM Neon polynomial vector 2368 }; 2369protected: 2370 /// ElementType - The element type of the vector. 2371 QualType ElementType; 2372 2373 VectorType(QualType vecType, unsigned nElements, QualType canonType, 2374 VectorKind vecKind); 2375 2376 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 2377 QualType canonType, VectorKind vecKind); 2378 2379 friend class ASTContext; // ASTContext creates these. 2380 2381public: 2382 2383 QualType getElementType() const { return ElementType; } 2384 unsigned getNumElements() const { return VectorTypeBits.NumElements; } 2385 2386 bool isSugared() const { return false; } 2387 QualType desugar() const { return QualType(this, 0); } 2388 2389 VectorKind getVectorKind() const { 2390 return VectorKind(VectorTypeBits.VecKind); 2391 } 2392 2393 void Profile(llvm::FoldingSetNodeID &ID) { 2394 Profile(ID, getElementType(), getNumElements(), 2395 getTypeClass(), getVectorKind()); 2396 } 2397 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 2398 unsigned NumElements, TypeClass TypeClass, 2399 VectorKind VecKind) { 2400 ID.AddPointer(ElementType.getAsOpaquePtr()); 2401 ID.AddInteger(NumElements); 2402 ID.AddInteger(TypeClass); 2403 ID.AddInteger(VecKind); 2404 } 2405 2406 static bool classof(const Type *T) { 2407 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 2408 } 2409 static bool classof(const VectorType *) { return true; } 2410}; 2411 2412/// ExtVectorType - Extended vector type. This type is created using 2413/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 2414/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 2415/// class enables syntactic extensions, like Vector Components for accessing 2416/// points, colors, and textures (modeled after OpenGL Shading Language). 2417class ExtVectorType : public VectorType { 2418 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 2419 VectorType(ExtVector, vecType, nElements, canonType, GenericVector) {} 2420 friend class ASTContext; // ASTContext creates these. 2421public: 2422 static int getPointAccessorIdx(char c) { 2423 switch (c) { 2424 default: return -1; 2425 case 'x': return 0; 2426 case 'y': return 1; 2427 case 'z': return 2; 2428 case 'w': return 3; 2429 } 2430 } 2431 static int getNumericAccessorIdx(char c) { 2432 switch (c) { 2433 default: return -1; 2434 case '0': return 0; 2435 case '1': return 1; 2436 case '2': return 2; 2437 case '3': return 3; 2438 case '4': return 4; 2439 case '5': return 5; 2440 case '6': return 6; 2441 case '7': return 7; 2442 case '8': return 8; 2443 case '9': return 9; 2444 case 'A': 2445 case 'a': return 10; 2446 case 'B': 2447 case 'b': return 11; 2448 case 'C': 2449 case 'c': return 12; 2450 case 'D': 2451 case 'd': return 13; 2452 case 'E': 2453 case 'e': return 14; 2454 case 'F': 2455 case 'f': return 15; 2456 } 2457 } 2458 2459 static int getAccessorIdx(char c) { 2460 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 2461 return getNumericAccessorIdx(c); 2462 } 2463 2464 bool isAccessorWithinNumElements(char c) const { 2465 if (int idx = getAccessorIdx(c)+1) 2466 return unsigned(idx-1) < getNumElements(); 2467 return false; 2468 } 2469 bool isSugared() const { return false; } 2470 QualType desugar() const { return QualType(this, 0); } 2471 2472 static bool classof(const Type *T) { 2473 return T->getTypeClass() == ExtVector; 2474 } 2475 static bool classof(const ExtVectorType *) { return true; } 2476}; 2477 2478/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 2479/// class of FunctionNoProtoType and FunctionProtoType. 2480/// 2481class FunctionType : public Type { 2482 // The type returned by the function. 2483 QualType ResultType; 2484 2485 public: 2486 /// ExtInfo - A class which abstracts out some details necessary for 2487 /// making a call. 2488 /// 2489 /// It is not actually used directly for storing this information in 2490 /// a FunctionType, although FunctionType does currently use the 2491 /// same bit-pattern. 2492 /// 2493 // If you add a field (say Foo), other than the obvious places (both, 2494 // constructors, compile failures), what you need to update is 2495 // * Operator== 2496 // * getFoo 2497 // * withFoo 2498 // * functionType. Add Foo, getFoo. 2499 // * ASTContext::getFooType 2500 // * ASTContext::mergeFunctionTypes 2501 // * FunctionNoProtoType::Profile 2502 // * FunctionProtoType::Profile 2503 // * TypePrinter::PrintFunctionProto 2504 // * AST read and write 2505 // * Codegen 2506 class ExtInfo { 2507 // Feel free to rearrange or add bits, but if you go over 8, 2508 // you'll need to adjust both the Bits field below and 2509 // Type::FunctionTypeBitfields. 2510 2511 // | CC |noreturn|produces|regparm| 2512 // |0 .. 2| 3 | 4 | 5 .. 7| 2513 // 2514 // regparm is either 0 (no regparm attribute) or the regparm value+1. 2515 enum { CallConvMask = 0x7 }; 2516 enum { NoReturnMask = 0x8 }; 2517 enum { ProducesResultMask = 0x10 }; 2518 enum { RegParmMask = ~(CallConvMask | NoReturnMask | ProducesResultMask), 2519 RegParmOffset = 5 }; // Assumed to be the last field 2520 2521 uint16_t Bits; 2522 2523 ExtInfo(unsigned Bits) : Bits(static_cast<uint16_t>(Bits)) {} 2524 2525 friend class FunctionType; 2526 2527 public: 2528 // Constructor with no defaults. Use this when you know that you 2529 // have all the elements (when reading an AST file for example). 2530 ExtInfo(bool noReturn, bool hasRegParm, unsigned regParm, CallingConv cc, 2531 bool producesResult) { 2532 assert((!hasRegParm || regParm < 7) && "Invalid regparm value"); 2533 Bits = ((unsigned) cc) | 2534 (noReturn ? NoReturnMask : 0) | 2535 (producesResult ? ProducesResultMask : 0) | 2536 (hasRegParm ? ((regParm + 1) << RegParmOffset) : 0); 2537 } 2538 2539 // Constructor with all defaults. Use when for example creating a 2540 // function know to use defaults. 2541 ExtInfo() : Bits(0) {} 2542 2543 bool getNoReturn() const { return Bits & NoReturnMask; } 2544 bool getProducesResult() const { return Bits & ProducesResultMask; } 2545 bool getHasRegParm() const { return (Bits >> RegParmOffset) != 0; } 2546 unsigned getRegParm() const { 2547 unsigned RegParm = Bits >> RegParmOffset; 2548 if (RegParm > 0) 2549 --RegParm; 2550 return RegParm; 2551 } 2552 CallingConv getCC() const { return CallingConv(Bits & CallConvMask); } 2553 2554 bool operator==(ExtInfo Other) const { 2555 return Bits == Other.Bits; 2556 } 2557 bool operator!=(ExtInfo Other) const { 2558 return Bits != Other.Bits; 2559 } 2560 2561 // Note that we don't have setters. That is by design, use 2562 // the following with methods instead of mutating these objects. 2563 2564 ExtInfo withNoReturn(bool noReturn) const { 2565 if (noReturn) 2566 return ExtInfo(Bits | NoReturnMask); 2567 else 2568 return ExtInfo(Bits & ~NoReturnMask); 2569 } 2570 2571 ExtInfo withProducesResult(bool producesResult) const { 2572 if (producesResult) 2573 return ExtInfo(Bits | ProducesResultMask); 2574 else 2575 return ExtInfo(Bits & ~ProducesResultMask); 2576 } 2577 2578 ExtInfo withRegParm(unsigned RegParm) const { 2579 assert(RegParm < 7 && "Invalid regparm value"); 2580 return ExtInfo((Bits & ~RegParmMask) | 2581 ((RegParm + 1) << RegParmOffset)); 2582 } 2583 2584 ExtInfo withCallingConv(CallingConv cc) const { 2585 return ExtInfo((Bits & ~CallConvMask) | (unsigned) cc); 2586 } 2587 2588 void Profile(llvm::FoldingSetNodeID &ID) const { 2589 ID.AddInteger(Bits); 2590 } 2591 }; 2592 2593protected: 2594 FunctionType(TypeClass tc, QualType res, bool variadic, 2595 unsigned typeQuals, RefQualifierKind RefQualifier, 2596 QualType Canonical, bool Dependent, 2597 bool InstantiationDependent, 2598 bool VariablyModified, bool ContainsUnexpandedParameterPack, 2599 ExtInfo Info) 2600 : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified, 2601 ContainsUnexpandedParameterPack), 2602 ResultType(res) { 2603 FunctionTypeBits.ExtInfo = Info.Bits; 2604 FunctionTypeBits.Variadic = variadic; 2605 FunctionTypeBits.TypeQuals = typeQuals; 2606 FunctionTypeBits.RefQualifier = static_cast<unsigned>(RefQualifier); 2607 } 2608 bool isVariadic() const { return FunctionTypeBits.Variadic; } 2609 unsigned getTypeQuals() const { return FunctionTypeBits.TypeQuals; } 2610 2611 RefQualifierKind getRefQualifier() const { 2612 return static_cast<RefQualifierKind>(FunctionTypeBits.RefQualifier); 2613 } 2614 2615public: 2616 2617 QualType getResultType() const { return ResultType; } 2618 2619 bool getHasRegParm() const { return getExtInfo().getHasRegParm(); } 2620 unsigned getRegParmType() const { return getExtInfo().getRegParm(); } 2621 bool getNoReturnAttr() const { return getExtInfo().getNoReturn(); } 2622 CallingConv getCallConv() const { return getExtInfo().getCC(); } 2623 ExtInfo getExtInfo() const { return ExtInfo(FunctionTypeBits.ExtInfo); } 2624 2625 /// \brief Determine the type of an expression that calls a function of 2626 /// this type. 2627 QualType getCallResultType(ASTContext &Context) const { 2628 return getResultType().getNonLValueExprType(Context); 2629 } 2630 2631 static llvm::StringRef getNameForCallConv(CallingConv CC); 2632 2633 static bool classof(const Type *T) { 2634 return T->getTypeClass() == FunctionNoProto || 2635 T->getTypeClass() == FunctionProto; 2636 } 2637 static bool classof(const FunctionType *) { return true; } 2638}; 2639 2640/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 2641/// no information available about its arguments. 2642class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 2643 FunctionNoProtoType(QualType Result, QualType Canonical, ExtInfo Info) 2644 : FunctionType(FunctionNoProto, Result, false, 0, RQ_None, Canonical, 2645 /*Dependent=*/false, /*InstantiationDependent=*/false, 2646 Result->isVariablyModifiedType(), 2647 /*ContainsUnexpandedParameterPack=*/false, Info) {} 2648 2649 friend class ASTContext; // ASTContext creates these. 2650 2651public: 2652 // No additional state past what FunctionType provides. 2653 2654 bool isSugared() const { return false; } 2655 QualType desugar() const { return QualType(this, 0); } 2656 2657 void Profile(llvm::FoldingSetNodeID &ID) { 2658 Profile(ID, getResultType(), getExtInfo()); 2659 } 2660 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 2661 ExtInfo Info) { 2662 Info.Profile(ID); 2663 ID.AddPointer(ResultType.getAsOpaquePtr()); 2664 } 2665 2666 static bool classof(const Type *T) { 2667 return T->getTypeClass() == FunctionNoProto; 2668 } 2669 static bool classof(const FunctionNoProtoType *) { return true; } 2670}; 2671 2672/// FunctionProtoType - Represents a prototype with argument type info, e.g. 2673/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 2674/// arguments, not as having a single void argument. Such a type can have an 2675/// exception specification, but this specification is not part of the canonical 2676/// type. 2677class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 2678public: 2679 /// ExtProtoInfo - Extra information about a function prototype. 2680 struct ExtProtoInfo { 2681 ExtProtoInfo() : 2682 Variadic(false), ExceptionSpecType(EST_None), TypeQuals(0), 2683 RefQualifier(RQ_None), NumExceptions(0), Exceptions(0), NoexceptExpr(0), 2684 ConsumedArguments(0) {} 2685 2686 FunctionType::ExtInfo ExtInfo; 2687 bool Variadic; 2688 ExceptionSpecificationType ExceptionSpecType; 2689 unsigned char TypeQuals; 2690 RefQualifierKind RefQualifier; 2691 unsigned NumExceptions; 2692 const QualType *Exceptions; 2693 Expr *NoexceptExpr; 2694 const bool *ConsumedArguments; 2695 }; 2696 2697private: 2698 /// \brief Determine whether there are any argument types that 2699 /// contain an unexpanded parameter pack. 2700 static bool containsAnyUnexpandedParameterPack(const QualType *ArgArray, 2701 unsigned numArgs) { 2702 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 2703 if (ArgArray[Idx]->containsUnexpandedParameterPack()) 2704 return true; 2705 2706 return false; 2707 } 2708 2709 FunctionProtoType(QualType result, const QualType *args, unsigned numArgs, 2710 QualType canonical, const ExtProtoInfo &epi); 2711 2712 /// NumArgs - The number of arguments this function has, not counting '...'. 2713 unsigned NumArgs : 19; 2714 2715 /// NumExceptions - The number of types in the exception spec, if any. 2716 unsigned NumExceptions : 9; 2717 2718 /// ExceptionSpecType - The type of exception specification this function has. 2719 unsigned ExceptionSpecType : 3; 2720 2721 /// HasAnyConsumedArgs - Whether this function has any consumed arguments. 2722 unsigned HasAnyConsumedArgs : 1; 2723 2724 /// ArgInfo - There is an variable size array after the class in memory that 2725 /// holds the argument types. 2726 2727 /// Exceptions - There is another variable size array after ArgInfo that 2728 /// holds the exception types. 2729 2730 /// NoexceptExpr - Instead of Exceptions, there may be a single Expr* pointing 2731 /// to the expression in the noexcept() specifier. 2732 2733 /// ConsumedArgs - A variable size array, following Exceptions 2734 /// and of length NumArgs, holding flags indicating which arguments 2735 /// are consumed. This only appears if HasAnyConsumedArgs is true. 2736 2737 friend class ASTContext; // ASTContext creates these. 2738 2739 const bool *getConsumedArgsBuffer() const { 2740 assert(hasAnyConsumedArgs()); 2741 2742 // Find the end of the exceptions. 2743 Expr * const *eh_end = reinterpret_cast<Expr * const *>(arg_type_end()); 2744 if (getExceptionSpecType() != EST_ComputedNoexcept) 2745 eh_end += NumExceptions; 2746 else 2747 eh_end += 1; // NoexceptExpr 2748 2749 return reinterpret_cast<const bool*>(eh_end); 2750 } 2751 2752public: 2753 unsigned getNumArgs() const { return NumArgs; } 2754 QualType getArgType(unsigned i) const { 2755 assert(i < NumArgs && "Invalid argument number!"); 2756 return arg_type_begin()[i]; 2757 } 2758 2759 ExtProtoInfo getExtProtoInfo() const { 2760 ExtProtoInfo EPI; 2761 EPI.ExtInfo = getExtInfo(); 2762 EPI.Variadic = isVariadic(); 2763 EPI.ExceptionSpecType = getExceptionSpecType(); 2764 EPI.TypeQuals = static_cast<unsigned char>(getTypeQuals()); 2765 EPI.RefQualifier = getRefQualifier(); 2766 if (EPI.ExceptionSpecType == EST_Dynamic) { 2767 EPI.NumExceptions = NumExceptions; 2768 EPI.Exceptions = exception_begin(); 2769 } else if (EPI.ExceptionSpecType == EST_ComputedNoexcept) { 2770 EPI.NoexceptExpr = getNoexceptExpr(); 2771 } 2772 if (hasAnyConsumedArgs()) 2773 EPI.ConsumedArguments = getConsumedArgsBuffer(); 2774 return EPI; 2775 } 2776 2777 /// \brief Get the kind of exception specification on this function. 2778 ExceptionSpecificationType getExceptionSpecType() const { 2779 return static_cast<ExceptionSpecificationType>(ExceptionSpecType); 2780 } 2781 /// \brief Return whether this function has any kind of exception spec. 2782 bool hasExceptionSpec() const { 2783 return getExceptionSpecType() != EST_None; 2784 } 2785 /// \brief Return whether this function has a dynamic (throw) exception spec. 2786 bool hasDynamicExceptionSpec() const { 2787 return isDynamicExceptionSpec(getExceptionSpecType()); 2788 } 2789 /// \brief Return whether this function has a noexcept exception spec. 2790 bool hasNoexceptExceptionSpec() const { 2791 return isNoexceptExceptionSpec(getExceptionSpecType()); 2792 } 2793 /// \brief Result type of getNoexceptSpec(). 2794 enum NoexceptResult { 2795 NR_NoNoexcept, ///< There is no noexcept specifier. 2796 NR_BadNoexcept, ///< The noexcept specifier has a bad expression. 2797 NR_Dependent, ///< The noexcept specifier is dependent. 2798 NR_Throw, ///< The noexcept specifier evaluates to false. 2799 NR_Nothrow ///< The noexcept specifier evaluates to true. 2800 }; 2801 /// \brief Get the meaning of the noexcept spec on this function, if any. 2802 NoexceptResult getNoexceptSpec(ASTContext &Ctx) const; 2803 unsigned getNumExceptions() const { return NumExceptions; } 2804 QualType getExceptionType(unsigned i) const { 2805 assert(i < NumExceptions && "Invalid exception number!"); 2806 return exception_begin()[i]; 2807 } 2808 Expr *getNoexceptExpr() const { 2809 if (getExceptionSpecType() != EST_ComputedNoexcept) 2810 return 0; 2811 // NoexceptExpr sits where the arguments end. 2812 return *reinterpret_cast<Expr *const *>(arg_type_end()); 2813 } 2814 bool isNothrow(ASTContext &Ctx) const { 2815 ExceptionSpecificationType EST = getExceptionSpecType(); 2816 assert(EST != EST_Delayed); 2817 if (EST == EST_DynamicNone || EST == EST_BasicNoexcept) 2818 return true; 2819 if (EST != EST_ComputedNoexcept) 2820 return false; 2821 return getNoexceptSpec(Ctx) == NR_Nothrow; 2822 } 2823 2824 using FunctionType::isVariadic; 2825 2826 /// \brief Determines whether this function prototype contains a 2827 /// parameter pack at the end. 2828 /// 2829 /// A function template whose last parameter is a parameter pack can be 2830 /// called with an arbitrary number of arguments, much like a variadic 2831 /// function. However, 2832 bool isTemplateVariadic() const; 2833 2834 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 2835 2836 2837 /// \brief Retrieve the ref-qualifier associated with this function type. 2838 RefQualifierKind getRefQualifier() const { 2839 return FunctionType::getRefQualifier(); 2840 } 2841 2842 typedef const QualType *arg_type_iterator; 2843 arg_type_iterator arg_type_begin() const { 2844 return reinterpret_cast<const QualType *>(this+1); 2845 } 2846 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 2847 2848 typedef const QualType *exception_iterator; 2849 exception_iterator exception_begin() const { 2850 // exceptions begin where arguments end 2851 return arg_type_end(); 2852 } 2853 exception_iterator exception_end() const { 2854 if (getExceptionSpecType() != EST_Dynamic) 2855 return exception_begin(); 2856 return exception_begin() + NumExceptions; 2857 } 2858 2859 bool hasAnyConsumedArgs() const { 2860 return HasAnyConsumedArgs; 2861 } 2862 bool isArgConsumed(unsigned I) const { 2863 assert(I < getNumArgs() && "argument index out of range!"); 2864 if (hasAnyConsumedArgs()) 2865 return getConsumedArgsBuffer()[I]; 2866 return false; 2867 } 2868 2869 bool isSugared() const { return false; } 2870 QualType desugar() const { return QualType(this, 0); } 2871 2872 static bool classof(const Type *T) { 2873 return T->getTypeClass() == FunctionProto; 2874 } 2875 static bool classof(const FunctionProtoType *) { return true; } 2876 2877 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx); 2878 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 2879 arg_type_iterator ArgTys, unsigned NumArgs, 2880 const ExtProtoInfo &EPI, const ASTContext &Context); 2881}; 2882 2883 2884/// \brief Represents the dependent type named by a dependently-scoped 2885/// typename using declaration, e.g. 2886/// using typename Base<T>::foo; 2887/// Template instantiation turns these into the underlying type. 2888class UnresolvedUsingType : public Type { 2889 UnresolvedUsingTypenameDecl *Decl; 2890 2891 UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) 2892 : Type(UnresolvedUsing, QualType(), true, true, false, 2893 /*ContainsUnexpandedParameterPack=*/false), 2894 Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} 2895 friend class ASTContext; // ASTContext creates these. 2896public: 2897 2898 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 2899 2900 bool isSugared() const { return false; } 2901 QualType desugar() const { return QualType(this, 0); } 2902 2903 static bool classof(const Type *T) { 2904 return T->getTypeClass() == UnresolvedUsing; 2905 } 2906 static bool classof(const UnresolvedUsingType *) { return true; } 2907 2908 void Profile(llvm::FoldingSetNodeID &ID) { 2909 return Profile(ID, Decl); 2910 } 2911 static void Profile(llvm::FoldingSetNodeID &ID, 2912 UnresolvedUsingTypenameDecl *D) { 2913 ID.AddPointer(D); 2914 } 2915}; 2916 2917 2918class TypedefType : public Type { 2919 TypedefNameDecl *Decl; 2920protected: 2921 TypedefType(TypeClass tc, const TypedefNameDecl *D, QualType can) 2922 : Type(tc, can, can->isDependentType(), 2923 can->isInstantiationDependentType(), 2924 can->isVariablyModifiedType(), 2925 /*ContainsUnexpandedParameterPack=*/false), 2926 Decl(const_cast<TypedefNameDecl*>(D)) { 2927 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2928 } 2929 friend class ASTContext; // ASTContext creates these. 2930public: 2931 2932 TypedefNameDecl *getDecl() const { return Decl; } 2933 2934 bool isSugared() const { return true; } 2935 QualType desugar() const; 2936 2937 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 2938 static bool classof(const TypedefType *) { return true; } 2939}; 2940 2941/// TypeOfExprType (GCC extension). 2942class TypeOfExprType : public Type { 2943 Expr *TOExpr; 2944 2945protected: 2946 TypeOfExprType(Expr *E, QualType can = QualType()); 2947 friend class ASTContext; // ASTContext creates these. 2948public: 2949 Expr *getUnderlyingExpr() const { return TOExpr; } 2950 2951 /// \brief Remove a single level of sugar. 2952 QualType desugar() const; 2953 2954 /// \brief Returns whether this type directly provides sugar. 2955 bool isSugared() const { return true; } 2956 2957 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 2958 static bool classof(const TypeOfExprType *) { return true; } 2959}; 2960 2961/// \brief Internal representation of canonical, dependent 2962/// typeof(expr) types. 2963/// 2964/// This class is used internally by the ASTContext to manage 2965/// canonical, dependent types, only. Clients will only see instances 2966/// of this class via TypeOfExprType nodes. 2967class DependentTypeOfExprType 2968 : public TypeOfExprType, public llvm::FoldingSetNode { 2969 const ASTContext &Context; 2970 2971public: 2972 DependentTypeOfExprType(const ASTContext &Context, Expr *E) 2973 : TypeOfExprType(E), Context(Context) { } 2974 2975 bool isSugared() const { return false; } 2976 QualType desugar() const { return QualType(this, 0); } 2977 2978 void Profile(llvm::FoldingSetNodeID &ID) { 2979 Profile(ID, Context, getUnderlyingExpr()); 2980 } 2981 2982 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2983 Expr *E); 2984}; 2985 2986/// TypeOfType (GCC extension). 2987class TypeOfType : public Type { 2988 QualType TOType; 2989 TypeOfType(QualType T, QualType can) 2990 : Type(TypeOf, can, T->isDependentType(), 2991 T->isInstantiationDependentType(), 2992 T->isVariablyModifiedType(), 2993 T->containsUnexpandedParameterPack()), 2994 TOType(T) { 2995 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2996 } 2997 friend class ASTContext; // ASTContext creates these. 2998public: 2999 QualType getUnderlyingType() const { return TOType; } 3000 3001 /// \brief Remove a single level of sugar. 3002 QualType desugar() const { return getUnderlyingType(); } 3003 3004 /// \brief Returns whether this type directly provides sugar. 3005 bool isSugared() const { return true; } 3006 3007 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 3008 static bool classof(const TypeOfType *) { return true; } 3009}; 3010 3011/// DecltypeType (C++0x) 3012class DecltypeType : public Type { 3013 Expr *E; 3014 3015 // FIXME: We could get rid of UnderlyingType if we wanted to: We would have to 3016 // Move getDesugaredType to ASTContext so that it can call getDecltypeForExpr 3017 // from it. 3018 QualType UnderlyingType; 3019 3020protected: 3021 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 3022 friend class ASTContext; // ASTContext creates these. 3023public: 3024 Expr *getUnderlyingExpr() const { return E; } 3025 QualType getUnderlyingType() const { return UnderlyingType; } 3026 3027 /// \brief Remove a single level of sugar. 3028 QualType desugar() const { return getUnderlyingType(); } 3029 3030 /// \brief Returns whether this type directly provides sugar. 3031 bool isSugared() const { return !isDependentType(); } 3032 3033 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 3034 static bool classof(const DecltypeType *) { return true; } 3035}; 3036 3037/// \brief Internal representation of canonical, dependent 3038/// decltype(expr) types. 3039/// 3040/// This class is used internally by the ASTContext to manage 3041/// canonical, dependent types, only. Clients will only see instances 3042/// of this class via DecltypeType nodes. 3043class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 3044 const ASTContext &Context; 3045 3046public: 3047 DependentDecltypeType(const ASTContext &Context, Expr *E); 3048 3049 bool isSugared() const { return false; } 3050 QualType desugar() const { return QualType(this, 0); } 3051 3052 void Profile(llvm::FoldingSetNodeID &ID) { 3053 Profile(ID, Context, getUnderlyingExpr()); 3054 } 3055 3056 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 3057 Expr *E); 3058}; 3059 3060/// \brief A unary type transform, which is a type constructed from another 3061class UnaryTransformType : public Type { 3062public: 3063 enum UTTKind { 3064 EnumUnderlyingType 3065 }; 3066 3067private: 3068 /// The untransformed type. 3069 QualType BaseType; 3070 /// The transformed type if not dependent, otherwise the same as BaseType. 3071 QualType UnderlyingType; 3072 3073 UTTKind UKind; 3074protected: 3075 UnaryTransformType(QualType BaseTy, QualType UnderlyingTy, UTTKind UKind, 3076 QualType CanonicalTy); 3077 friend class ASTContext; 3078public: 3079 bool isSugared() const { return !isDependentType(); } 3080 QualType desugar() const { return UnderlyingType; } 3081 3082 QualType getUnderlyingType() const { return UnderlyingType; } 3083 QualType getBaseType() const { return BaseType; } 3084 3085 UTTKind getUTTKind() const { return UKind; } 3086 3087 static bool classof(const Type *T) { 3088 return T->getTypeClass() == UnaryTransform; 3089 } 3090 static bool classof(const UnaryTransformType *) { return true; } 3091}; 3092 3093class TagType : public Type { 3094 /// Stores the TagDecl associated with this type. The decl may point to any 3095 /// TagDecl that declares the entity. 3096 TagDecl * decl; 3097 3098protected: 3099 TagType(TypeClass TC, const TagDecl *D, QualType can); 3100 3101public: 3102 TagDecl *getDecl() const; 3103 3104 /// @brief Determines whether this type is in the process of being 3105 /// defined. 3106 bool isBeingDefined() const; 3107 3108 static bool classof(const Type *T) { 3109 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 3110 } 3111 static bool classof(const TagType *) { return true; } 3112 static bool classof(const RecordType *) { return true; } 3113 static bool classof(const EnumType *) { return true; } 3114}; 3115 3116/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 3117/// to detect TagType objects of structs/unions/classes. 3118class RecordType : public TagType { 3119protected: 3120 explicit RecordType(const RecordDecl *D) 3121 : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3122 explicit RecordType(TypeClass TC, RecordDecl *D) 3123 : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3124 friend class ASTContext; // ASTContext creates these. 3125public: 3126 3127 RecordDecl *getDecl() const { 3128 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 3129 } 3130 3131 // FIXME: This predicate is a helper to QualType/Type. It needs to 3132 // recursively check all fields for const-ness. If any field is declared 3133 // const, it needs to return false. 3134 bool hasConstFields() const { return false; } 3135 3136 bool isSugared() const { return false; } 3137 QualType desugar() const { return QualType(this, 0); } 3138 3139 static bool classof(const TagType *T); 3140 static bool classof(const Type *T) { 3141 return isa<TagType>(T) && classof(cast<TagType>(T)); 3142 } 3143 static bool classof(const RecordType *) { return true; } 3144}; 3145 3146/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 3147/// to detect TagType objects of enums. 3148class EnumType : public TagType { 3149 explicit EnumType(const EnumDecl *D) 3150 : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3151 friend class ASTContext; // ASTContext creates these. 3152public: 3153 3154 EnumDecl *getDecl() const { 3155 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 3156 } 3157 3158 bool isSugared() const { return false; } 3159 QualType desugar() const { return QualType(this, 0); } 3160 3161 static bool classof(const TagType *T); 3162 static bool classof(const Type *T) { 3163 return isa<TagType>(T) && classof(cast<TagType>(T)); 3164 } 3165 static bool classof(const EnumType *) { return true; } 3166}; 3167 3168/// AttributedType - An attributed type is a type to which a type 3169/// attribute has been applied. The "modified type" is the 3170/// fully-sugared type to which the attributed type was applied; 3171/// generally it is not canonically equivalent to the attributed type. 3172/// The "equivalent type" is the minimally-desugared type which the 3173/// type is canonically equivalent to. 3174/// 3175/// For example, in the following attributed type: 3176/// int32_t __attribute__((vector_size(16))) 3177/// - the modified type is the TypedefType for int32_t 3178/// - the equivalent type is VectorType(16, int32_t) 3179/// - the canonical type is VectorType(16, int) 3180class AttributedType : public Type, public llvm::FoldingSetNode { 3181public: 3182 // It is really silly to have yet another attribute-kind enum, but 3183 // clang::attr::Kind doesn't currently cover the pure type attrs. 3184 enum Kind { 3185 // Expression operand. 3186 attr_address_space, 3187 attr_regparm, 3188 attr_vector_size, 3189 attr_neon_vector_type, 3190 attr_neon_polyvector_type, 3191 3192 FirstExprOperandKind = attr_address_space, 3193 LastExprOperandKind = attr_neon_polyvector_type, 3194 3195 // Enumerated operand (string or keyword). 3196 attr_objc_gc, 3197 attr_objc_ownership, 3198 attr_pcs, 3199 3200 FirstEnumOperandKind = attr_objc_gc, 3201 LastEnumOperandKind = attr_pcs, 3202 3203 // No operand. 3204 attr_noreturn, 3205 attr_cdecl, 3206 attr_fastcall, 3207 attr_stdcall, 3208 attr_thiscall, 3209 attr_pascal 3210 }; 3211 3212private: 3213 QualType ModifiedType; 3214 QualType EquivalentType; 3215 3216 friend class ASTContext; // creates these 3217 3218 AttributedType(QualType canon, Kind attrKind, 3219 QualType modified, QualType equivalent) 3220 : Type(Attributed, canon, canon->isDependentType(), 3221 canon->isInstantiationDependentType(), 3222 canon->isVariablyModifiedType(), 3223 canon->containsUnexpandedParameterPack()), 3224 ModifiedType(modified), EquivalentType(equivalent) { 3225 AttributedTypeBits.AttrKind = attrKind; 3226 } 3227 3228public: 3229 Kind getAttrKind() const { 3230 return static_cast<Kind>(AttributedTypeBits.AttrKind); 3231 } 3232 3233 QualType getModifiedType() const { return ModifiedType; } 3234 QualType getEquivalentType() const { return EquivalentType; } 3235 3236 bool isSugared() const { return true; } 3237 QualType desugar() const { return getEquivalentType(); } 3238 3239 void Profile(llvm::FoldingSetNodeID &ID) { 3240 Profile(ID, getAttrKind(), ModifiedType, EquivalentType); 3241 } 3242 3243 static void Profile(llvm::FoldingSetNodeID &ID, Kind attrKind, 3244 QualType modified, QualType equivalent) { 3245 ID.AddInteger(attrKind); 3246 ID.AddPointer(modified.getAsOpaquePtr()); 3247 ID.AddPointer(equivalent.getAsOpaquePtr()); 3248 } 3249 3250 static bool classof(const Type *T) { 3251 return T->getTypeClass() == Attributed; 3252 } 3253 static bool classof(const AttributedType *T) { return true; } 3254}; 3255 3256class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 3257 // Helper data collector for canonical types. 3258 struct CanonicalTTPTInfo { 3259 unsigned Depth : 15; 3260 unsigned ParameterPack : 1; 3261 unsigned Index : 16; 3262 }; 3263 3264 union { 3265 // Info for the canonical type. 3266 CanonicalTTPTInfo CanTTPTInfo; 3267 // Info for the non-canonical type. 3268 TemplateTypeParmDecl *TTPDecl; 3269 }; 3270 3271 /// Build a non-canonical type. 3272 TemplateTypeParmType(TemplateTypeParmDecl *TTPDecl, QualType Canon) 3273 : Type(TemplateTypeParm, Canon, /*Dependent=*/true, 3274 /*InstantiationDependent=*/true, 3275 /*VariablyModified=*/false, 3276 Canon->containsUnexpandedParameterPack()), 3277 TTPDecl(TTPDecl) { } 3278 3279 /// Build the canonical type. 3280 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 3281 : Type(TemplateTypeParm, QualType(this, 0), 3282 /*Dependent=*/true, 3283 /*InstantiationDependent=*/true, 3284 /*VariablyModified=*/false, PP) { 3285 CanTTPTInfo.Depth = D; 3286 CanTTPTInfo.Index = I; 3287 CanTTPTInfo.ParameterPack = PP; 3288 } 3289 3290 friend class ASTContext; // ASTContext creates these 3291 3292 const CanonicalTTPTInfo& getCanTTPTInfo() const { 3293 QualType Can = getCanonicalTypeInternal(); 3294 return Can->castAs<TemplateTypeParmType>()->CanTTPTInfo; 3295 } 3296 3297public: 3298 unsigned getDepth() const { return getCanTTPTInfo().Depth; } 3299 unsigned getIndex() const { return getCanTTPTInfo().Index; } 3300 bool isParameterPack() const { return getCanTTPTInfo().ParameterPack; } 3301 3302 TemplateTypeParmDecl *getDecl() const { 3303 return isCanonicalUnqualified() ? 0 : TTPDecl; 3304 } 3305 3306 IdentifierInfo *getIdentifier() const; 3307 3308 bool isSugared() const { return false; } 3309 QualType desugar() const { return QualType(this, 0); } 3310 3311 void Profile(llvm::FoldingSetNodeID &ID) { 3312 Profile(ID, getDepth(), getIndex(), isParameterPack(), getDecl()); 3313 } 3314 3315 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 3316 unsigned Index, bool ParameterPack, 3317 TemplateTypeParmDecl *TTPDecl) { 3318 ID.AddInteger(Depth); 3319 ID.AddInteger(Index); 3320 ID.AddBoolean(ParameterPack); 3321 ID.AddPointer(TTPDecl); 3322 } 3323 3324 static bool classof(const Type *T) { 3325 return T->getTypeClass() == TemplateTypeParm; 3326 } 3327 static bool classof(const TemplateTypeParmType *T) { return true; } 3328}; 3329 3330/// \brief Represents the result of substituting a type for a template 3331/// type parameter. 3332/// 3333/// Within an instantiated template, all template type parameters have 3334/// been replaced with these. They are used solely to record that a 3335/// type was originally written as a template type parameter; 3336/// therefore they are never canonical. 3337class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 3338 // The original type parameter. 3339 const TemplateTypeParmType *Replaced; 3340 3341 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 3342 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType(), 3343 Canon->isInstantiationDependentType(), 3344 Canon->isVariablyModifiedType(), 3345 Canon->containsUnexpandedParameterPack()), 3346 Replaced(Param) { } 3347 3348 friend class ASTContext; 3349 3350public: 3351 /// Gets the template parameter that was substituted for. 3352 const TemplateTypeParmType *getReplacedParameter() const { 3353 return Replaced; 3354 } 3355 3356 /// Gets the type that was substituted for the template 3357 /// parameter. 3358 QualType getReplacementType() const { 3359 return getCanonicalTypeInternal(); 3360 } 3361 3362 bool isSugared() const { return true; } 3363 QualType desugar() const { return getReplacementType(); } 3364 3365 void Profile(llvm::FoldingSetNodeID &ID) { 3366 Profile(ID, getReplacedParameter(), getReplacementType()); 3367 } 3368 static void Profile(llvm::FoldingSetNodeID &ID, 3369 const TemplateTypeParmType *Replaced, 3370 QualType Replacement) { 3371 ID.AddPointer(Replaced); 3372 ID.AddPointer(Replacement.getAsOpaquePtr()); 3373 } 3374 3375 static bool classof(const Type *T) { 3376 return T->getTypeClass() == SubstTemplateTypeParm; 3377 } 3378 static bool classof(const SubstTemplateTypeParmType *T) { return true; } 3379}; 3380 3381/// \brief Represents the result of substituting a set of types for a template 3382/// type parameter pack. 3383/// 3384/// When a pack expansion in the source code contains multiple parameter packs 3385/// and those parameter packs correspond to different levels of template 3386/// parameter lists, this type node is used to represent a template type 3387/// parameter pack from an outer level, which has already had its argument pack 3388/// substituted but that still lives within a pack expansion that itself 3389/// could not be instantiated. When actually performing a substitution into 3390/// that pack expansion (e.g., when all template parameters have corresponding 3391/// arguments), this type will be replaced with the \c SubstTemplateTypeParmType 3392/// at the current pack substitution index. 3393class SubstTemplateTypeParmPackType : public Type, public llvm::FoldingSetNode { 3394 /// \brief The original type parameter. 3395 const TemplateTypeParmType *Replaced; 3396 3397 /// \brief A pointer to the set of template arguments that this 3398 /// parameter pack is instantiated with. 3399 const TemplateArgument *Arguments; 3400 3401 /// \brief The number of template arguments in \c Arguments. 3402 unsigned NumArguments; 3403 3404 SubstTemplateTypeParmPackType(const TemplateTypeParmType *Param, 3405 QualType Canon, 3406 const TemplateArgument &ArgPack); 3407 3408 friend class ASTContext; 3409 3410public: 3411 IdentifierInfo *getIdentifier() const { return Replaced->getIdentifier(); } 3412 3413 /// Gets the template parameter that was substituted for. 3414 const TemplateTypeParmType *getReplacedParameter() const { 3415 return Replaced; 3416 } 3417 3418 bool isSugared() const { return false; } 3419 QualType desugar() const { return QualType(this, 0); } 3420 3421 TemplateArgument getArgumentPack() const; 3422 3423 void Profile(llvm::FoldingSetNodeID &ID); 3424 static void Profile(llvm::FoldingSetNodeID &ID, 3425 const TemplateTypeParmType *Replaced, 3426 const TemplateArgument &ArgPack); 3427 3428 static bool classof(const Type *T) { 3429 return T->getTypeClass() == SubstTemplateTypeParmPack; 3430 } 3431 static bool classof(const SubstTemplateTypeParmPackType *T) { return true; } 3432}; 3433 3434/// \brief Represents a C++0x auto type. 3435/// 3436/// These types are usually a placeholder for a deduced type. However, within 3437/// templates and before the initializer is attached, there is no deduced type 3438/// and an auto type is type-dependent and canonical. 3439class AutoType : public Type, public llvm::FoldingSetNode { 3440 AutoType(QualType DeducedType) 3441 : Type(Auto, DeducedType.isNull() ? QualType(this, 0) : DeducedType, 3442 /*Dependent=*/DeducedType.isNull(), 3443 /*InstantiationDependent=*/DeducedType.isNull(), 3444 /*VariablyModified=*/false, /*ContainsParameterPack=*/false) { 3445 assert((DeducedType.isNull() || !DeducedType->isDependentType()) && 3446 "deduced a dependent type for auto"); 3447 } 3448 3449 friend class ASTContext; // ASTContext creates these 3450 3451public: 3452 bool isSugared() const { return isDeduced(); } 3453 QualType desugar() const { return getCanonicalTypeInternal(); } 3454 3455 QualType getDeducedType() const { 3456 return isDeduced() ? getCanonicalTypeInternal() : QualType(); 3457 } 3458 bool isDeduced() const { 3459 return !isDependentType(); 3460 } 3461 3462 void Profile(llvm::FoldingSetNodeID &ID) { 3463 Profile(ID, getDeducedType()); 3464 } 3465 3466 static void Profile(llvm::FoldingSetNodeID &ID, 3467 QualType Deduced) { 3468 ID.AddPointer(Deduced.getAsOpaquePtr()); 3469 } 3470 3471 static bool classof(const Type *T) { 3472 return T->getTypeClass() == Auto; 3473 } 3474 static bool classof(const AutoType *T) { return true; } 3475}; 3476 3477/// \brief Represents a type template specialization; the template 3478/// must be a class template, a type alias template, or a template 3479/// template parameter. A template which cannot be resolved to one of 3480/// these, e.g. because it is written with a dependent scope 3481/// specifier, is instead represented as a 3482/// @c DependentTemplateSpecializationType. 3483/// 3484/// A non-dependent template specialization type is always "sugar", 3485/// typically for a @c RecordType. For example, a class template 3486/// specialization type of @c vector<int> will refer to a tag type for 3487/// the instantiation @c std::vector<int, std::allocator<int>> 3488/// 3489/// Template specializations are dependent if either the template or 3490/// any of the template arguments are dependent, in which case the 3491/// type may also be canonical. 3492/// 3493/// Instances of this type are allocated with a trailing array of 3494/// TemplateArguments, followed by a QualType representing the 3495/// non-canonical aliased type when the template is a type alias 3496/// template. 3497class TemplateSpecializationType 3498 : public Type, public llvm::FoldingSetNode { 3499 /// \brief The name of the template being specialized. This is 3500 /// either a TemplateName::Template (in which case it is a 3501 /// ClassTemplateDecl*, a TemplateTemplateParmDecl*, or a 3502 /// TypeAliasTemplateDecl*), a 3503 /// TemplateName::SubstTemplateTemplateParmPack, or a 3504 /// TemplateName::SubstTemplateTemplateParm (in which case the 3505 /// replacement must, recursively, be one of these). 3506 TemplateName Template; 3507 3508 /// \brief - The number of template arguments named in this class 3509 /// template specialization. 3510 unsigned NumArgs; 3511 3512 TemplateSpecializationType(TemplateName T, 3513 const TemplateArgument *Args, 3514 unsigned NumArgs, QualType Canon, 3515 QualType Aliased); 3516 3517 friend class ASTContext; // ASTContext creates these 3518 3519public: 3520 /// \brief Determine whether any of the given template arguments are 3521 /// dependent. 3522 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 3523 unsigned NumArgs, 3524 bool &InstantiationDependent); 3525 3526 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 3527 unsigned NumArgs, 3528 bool &InstantiationDependent); 3529 3530 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &, 3531 bool &InstantiationDependent); 3532 3533 /// \brief Print a template argument list, including the '<' and '>' 3534 /// enclosing the template arguments. 3535 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 3536 unsigned NumArgs, 3537 const PrintingPolicy &Policy, 3538 bool SkipBrackets = false); 3539 3540 static std::string PrintTemplateArgumentList(const TemplateArgumentLoc *Args, 3541 unsigned NumArgs, 3542 const PrintingPolicy &Policy); 3543 3544 static std::string PrintTemplateArgumentList(const TemplateArgumentListInfo &, 3545 const PrintingPolicy &Policy); 3546 3547 /// True if this template specialization type matches a current 3548 /// instantiation in the context in which it is found. 3549 bool isCurrentInstantiation() const { 3550 return isa<InjectedClassNameType>(getCanonicalTypeInternal()); 3551 } 3552 3553 /// True if this template specialization type is for a type alias 3554 /// template. 3555 bool isTypeAlias() const; 3556 /// Get the aliased type, if this is a specialization of a type alias 3557 /// template. 3558 QualType getAliasedType() const { 3559 assert(isTypeAlias() && "not a type alias template specialization"); 3560 return *reinterpret_cast<const QualType*>(end()); 3561 } 3562 3563 typedef const TemplateArgument * iterator; 3564 3565 iterator begin() const { return getArgs(); } 3566 iterator end() const; // defined inline in TemplateBase.h 3567 3568 /// \brief Retrieve the name of the template that we are specializing. 3569 TemplateName getTemplateName() const { return Template; } 3570 3571 /// \brief Retrieve the template arguments. 3572 const TemplateArgument *getArgs() const { 3573 return reinterpret_cast<const TemplateArgument *>(this + 1); 3574 } 3575 3576 /// \brief Retrieve the number of template arguments. 3577 unsigned getNumArgs() const { return NumArgs; } 3578 3579 /// \brief Retrieve a specific template argument as a type. 3580 /// \precondition @c isArgType(Arg) 3581 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 3582 3583 bool isSugared() const { 3584 return !isDependentType() || isCurrentInstantiation() || isTypeAlias(); 3585 } 3586 QualType desugar() const { return getCanonicalTypeInternal(); } 3587 3588 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) { 3589 Profile(ID, Template, getArgs(), NumArgs, Ctx); 3590 if (isTypeAlias()) 3591 getAliasedType().Profile(ID); 3592 } 3593 3594 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 3595 const TemplateArgument *Args, 3596 unsigned NumArgs, 3597 const ASTContext &Context); 3598 3599 static bool classof(const Type *T) { 3600 return T->getTypeClass() == TemplateSpecialization; 3601 } 3602 static bool classof(const TemplateSpecializationType *T) { return true; } 3603}; 3604 3605/// \brief The injected class name of a C++ class template or class 3606/// template partial specialization. Used to record that a type was 3607/// spelled with a bare identifier rather than as a template-id; the 3608/// equivalent for non-templated classes is just RecordType. 3609/// 3610/// Injected class name types are always dependent. Template 3611/// instantiation turns these into RecordTypes. 3612/// 3613/// Injected class name types are always canonical. This works 3614/// because it is impossible to compare an injected class name type 3615/// with the corresponding non-injected template type, for the same 3616/// reason that it is impossible to directly compare template 3617/// parameters from different dependent contexts: injected class name 3618/// types can only occur within the scope of a particular templated 3619/// declaration, and within that scope every template specialization 3620/// will canonicalize to the injected class name (when appropriate 3621/// according to the rules of the language). 3622class InjectedClassNameType : public Type { 3623 CXXRecordDecl *Decl; 3624 3625 /// The template specialization which this type represents. 3626 /// For example, in 3627 /// template <class T> class A { ... }; 3628 /// this is A<T>, whereas in 3629 /// template <class X, class Y> class A<B<X,Y> > { ... }; 3630 /// this is A<B<X,Y> >. 3631 /// 3632 /// It is always unqualified, always a template specialization type, 3633 /// and always dependent. 3634 QualType InjectedType; 3635 3636 friend class ASTContext; // ASTContext creates these. 3637 friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not 3638 // currently suitable for AST reading, too much 3639 // interdependencies. 3640 InjectedClassNameType(CXXRecordDecl *D, QualType TST) 3641 : Type(InjectedClassName, QualType(), /*Dependent=*/true, 3642 /*InstantiationDependent=*/true, 3643 /*VariablyModified=*/false, 3644 /*ContainsUnexpandedParameterPack=*/false), 3645 Decl(D), InjectedType(TST) { 3646 assert(isa<TemplateSpecializationType>(TST)); 3647 assert(!TST.hasQualifiers()); 3648 assert(TST->isDependentType()); 3649 } 3650 3651public: 3652 QualType getInjectedSpecializationType() const { return InjectedType; } 3653 const TemplateSpecializationType *getInjectedTST() const { 3654 return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); 3655 } 3656 3657 CXXRecordDecl *getDecl() const; 3658 3659 bool isSugared() const { return false; } 3660 QualType desugar() const { return QualType(this, 0); } 3661 3662 static bool classof(const Type *T) { 3663 return T->getTypeClass() == InjectedClassName; 3664 } 3665 static bool classof(const InjectedClassNameType *T) { return true; } 3666}; 3667 3668/// \brief The kind of a tag type. 3669enum TagTypeKind { 3670 /// \brief The "struct" keyword. 3671 TTK_Struct, 3672 /// \brief The "union" keyword. 3673 TTK_Union, 3674 /// \brief The "class" keyword. 3675 TTK_Class, 3676 /// \brief The "enum" keyword. 3677 TTK_Enum 3678}; 3679 3680/// \brief The elaboration keyword that precedes a qualified type name or 3681/// introduces an elaborated-type-specifier. 3682enum ElaboratedTypeKeyword { 3683 /// \brief The "struct" keyword introduces the elaborated-type-specifier. 3684 ETK_Struct, 3685 /// \brief The "union" keyword introduces the elaborated-type-specifier. 3686 ETK_Union, 3687 /// \brief The "class" keyword introduces the elaborated-type-specifier. 3688 ETK_Class, 3689 /// \brief The "enum" keyword introduces the elaborated-type-specifier. 3690 ETK_Enum, 3691 /// \brief The "typename" keyword precedes the qualified type name, e.g., 3692 /// \c typename T::type. 3693 ETK_Typename, 3694 /// \brief No keyword precedes the qualified type name. 3695 ETK_None 3696}; 3697 3698/// A helper class for Type nodes having an ElaboratedTypeKeyword. 3699/// The keyword in stored in the free bits of the base class. 3700/// Also provides a few static helpers for converting and printing 3701/// elaborated type keyword and tag type kind enumerations. 3702class TypeWithKeyword : public Type { 3703protected: 3704 TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, 3705 QualType Canonical, bool Dependent, 3706 bool InstantiationDependent, bool VariablyModified, 3707 bool ContainsUnexpandedParameterPack) 3708 : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified, 3709 ContainsUnexpandedParameterPack) { 3710 TypeWithKeywordBits.Keyword = Keyword; 3711 } 3712 3713public: 3714 ElaboratedTypeKeyword getKeyword() const { 3715 return static_cast<ElaboratedTypeKeyword>(TypeWithKeywordBits.Keyword); 3716 } 3717 3718 /// getKeywordForTypeSpec - Converts a type specifier (DeclSpec::TST) 3719 /// into an elaborated type keyword. 3720 static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); 3721 3722 /// getTagTypeKindForTypeSpec - Converts a type specifier (DeclSpec::TST) 3723 /// into a tag type kind. It is an error to provide a type specifier 3724 /// which *isn't* a tag kind here. 3725 static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); 3726 3727 /// getKeywordForTagDeclKind - Converts a TagTypeKind into an 3728 /// elaborated type keyword. 3729 static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); 3730 3731 /// getTagTypeKindForKeyword - Converts an elaborated type keyword into 3732 // a TagTypeKind. It is an error to provide an elaborated type keyword 3733 /// which *isn't* a tag kind here. 3734 static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); 3735 3736 static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); 3737 3738 static const char *getKeywordName(ElaboratedTypeKeyword Keyword); 3739 3740 static const char *getTagTypeKindName(TagTypeKind Kind) { 3741 return getKeywordName(getKeywordForTagTypeKind(Kind)); 3742 } 3743 3744 class CannotCastToThisType {}; 3745 static CannotCastToThisType classof(const Type *); 3746}; 3747 3748/// \brief Represents a type that was referred to using an elaborated type 3749/// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, 3750/// or both. 3751/// 3752/// This type is used to keep track of a type name as written in the 3753/// source code, including tag keywords and any nested-name-specifiers. 3754/// The type itself is always "sugar", used to express what was written 3755/// in the source code but containing no additional semantic information. 3756class ElaboratedType : public TypeWithKeyword, public llvm::FoldingSetNode { 3757 3758 /// \brief The nested name specifier containing the qualifier. 3759 NestedNameSpecifier *NNS; 3760 3761 /// \brief The type that this qualified name refers to. 3762 QualType NamedType; 3763 3764 ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3765 QualType NamedType, QualType CanonType) 3766 : TypeWithKeyword(Keyword, Elaborated, CanonType, 3767 NamedType->isDependentType(), 3768 NamedType->isInstantiationDependentType(), 3769 NamedType->isVariablyModifiedType(), 3770 NamedType->containsUnexpandedParameterPack()), 3771 NNS(NNS), NamedType(NamedType) { 3772 assert(!(Keyword == ETK_None && NNS == 0) && 3773 "ElaboratedType cannot have elaborated type keyword " 3774 "and name qualifier both null."); 3775 } 3776 3777 friend class ASTContext; // ASTContext creates these 3778 3779public: 3780 ~ElaboratedType(); 3781 3782 /// \brief Retrieve the qualification on this type. 3783 NestedNameSpecifier *getQualifier() const { return NNS; } 3784 3785 /// \brief Retrieve the type named by the qualified-id. 3786 QualType getNamedType() const { return NamedType; } 3787 3788 /// \brief Remove a single level of sugar. 3789 QualType desugar() const { return getNamedType(); } 3790 3791 /// \brief Returns whether this type directly provides sugar. 3792 bool isSugared() const { return true; } 3793 3794 void Profile(llvm::FoldingSetNodeID &ID) { 3795 Profile(ID, getKeyword(), NNS, NamedType); 3796 } 3797 3798 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3799 NestedNameSpecifier *NNS, QualType NamedType) { 3800 ID.AddInteger(Keyword); 3801 ID.AddPointer(NNS); 3802 NamedType.Profile(ID); 3803 } 3804 3805 static bool classof(const Type *T) { 3806 return T->getTypeClass() == Elaborated; 3807 } 3808 static bool classof(const ElaboratedType *T) { return true; } 3809}; 3810 3811/// \brief Represents a qualified type name for which the type name is 3812/// dependent. 3813/// 3814/// DependentNameType represents a class of dependent types that involve a 3815/// dependent nested-name-specifier (e.g., "T::") followed by a (dependent) 3816/// name of a type. The DependentNameType may start with a "typename" (for a 3817/// typename-specifier), "class", "struct", "union", or "enum" (for a 3818/// dependent elaborated-type-specifier), or nothing (in contexts where we 3819/// know that we must be referring to a type, e.g., in a base class specifier). 3820class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { 3821 3822 /// \brief The nested name specifier containing the qualifier. 3823 NestedNameSpecifier *NNS; 3824 3825 /// \brief The type that this typename specifier refers to. 3826 const IdentifierInfo *Name; 3827 3828 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3829 const IdentifierInfo *Name, QualType CanonType) 3830 : TypeWithKeyword(Keyword, DependentName, CanonType, /*Dependent=*/true, 3831 /*InstantiationDependent=*/true, 3832 /*VariablyModified=*/false, 3833 NNS->containsUnexpandedParameterPack()), 3834 NNS(NNS), Name(Name) { 3835 assert(NNS->isDependent() && 3836 "DependentNameType requires a dependent nested-name-specifier"); 3837 } 3838 3839 friend class ASTContext; // ASTContext creates these 3840 3841public: 3842 /// \brief Retrieve the qualification on this type. 3843 NestedNameSpecifier *getQualifier() const { return NNS; } 3844 3845 /// \brief Retrieve the type named by the typename specifier as an 3846 /// identifier. 3847 /// 3848 /// This routine will return a non-NULL identifier pointer when the 3849 /// form of the original typename was terminated by an identifier, 3850 /// e.g., "typename T::type". 3851 const IdentifierInfo *getIdentifier() const { 3852 return Name; 3853 } 3854 3855 bool isSugared() const { return false; } 3856 QualType desugar() const { return QualType(this, 0); } 3857 3858 void Profile(llvm::FoldingSetNodeID &ID) { 3859 Profile(ID, getKeyword(), NNS, Name); 3860 } 3861 3862 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3863 NestedNameSpecifier *NNS, const IdentifierInfo *Name) { 3864 ID.AddInteger(Keyword); 3865 ID.AddPointer(NNS); 3866 ID.AddPointer(Name); 3867 } 3868 3869 static bool classof(const Type *T) { 3870 return T->getTypeClass() == DependentName; 3871 } 3872 static bool classof(const DependentNameType *T) { return true; } 3873}; 3874 3875/// DependentTemplateSpecializationType - Represents a template 3876/// specialization type whose template cannot be resolved, e.g. 3877/// A<T>::template B<T> 3878class DependentTemplateSpecializationType : 3879 public TypeWithKeyword, public llvm::FoldingSetNode { 3880 3881 /// \brief The nested name specifier containing the qualifier. 3882 NestedNameSpecifier *NNS; 3883 3884 /// \brief The identifier of the template. 3885 const IdentifierInfo *Name; 3886 3887 /// \brief - The number of template arguments named in this class 3888 /// template specialization. 3889 unsigned NumArgs; 3890 3891 const TemplateArgument *getArgBuffer() const { 3892 return reinterpret_cast<const TemplateArgument*>(this+1); 3893 } 3894 TemplateArgument *getArgBuffer() { 3895 return reinterpret_cast<TemplateArgument*>(this+1); 3896 } 3897 3898 DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 3899 NestedNameSpecifier *NNS, 3900 const IdentifierInfo *Name, 3901 unsigned NumArgs, 3902 const TemplateArgument *Args, 3903 QualType Canon); 3904 3905 friend class ASTContext; // ASTContext creates these 3906 3907public: 3908 NestedNameSpecifier *getQualifier() const { return NNS; } 3909 const IdentifierInfo *getIdentifier() const { return Name; } 3910 3911 /// \brief Retrieve the template arguments. 3912 const TemplateArgument *getArgs() const { 3913 return getArgBuffer(); 3914 } 3915 3916 /// \brief Retrieve the number of template arguments. 3917 unsigned getNumArgs() const { return NumArgs; } 3918 3919 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 3920 3921 typedef const TemplateArgument * iterator; 3922 iterator begin() const { return getArgs(); } 3923 iterator end() const; // inline in TemplateBase.h 3924 3925 bool isSugared() const { return false; } 3926 QualType desugar() const { return QualType(this, 0); } 3927 3928 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) { 3929 Profile(ID, Context, getKeyword(), NNS, Name, NumArgs, getArgs()); 3930 } 3931 3932 static void Profile(llvm::FoldingSetNodeID &ID, 3933 const ASTContext &Context, 3934 ElaboratedTypeKeyword Keyword, 3935 NestedNameSpecifier *Qualifier, 3936 const IdentifierInfo *Name, 3937 unsigned NumArgs, 3938 const TemplateArgument *Args); 3939 3940 static bool classof(const Type *T) { 3941 return T->getTypeClass() == DependentTemplateSpecialization; 3942 } 3943 static bool classof(const DependentTemplateSpecializationType *T) { 3944 return true; 3945 } 3946}; 3947 3948/// \brief Represents a pack expansion of types. 3949/// 3950/// Pack expansions are part of C++0x variadic templates. A pack 3951/// expansion contains a pattern, which itself contains one or more 3952/// "unexpanded" parameter packs. When instantiated, a pack expansion 3953/// produces a series of types, each instantiated from the pattern of 3954/// the expansion, where the Ith instantiation of the pattern uses the 3955/// Ith arguments bound to each of the unexpanded parameter packs. The 3956/// pack expansion is considered to "expand" these unexpanded 3957/// parameter packs. 3958/// 3959/// \code 3960/// template<typename ...Types> struct tuple; 3961/// 3962/// template<typename ...Types> 3963/// struct tuple_of_references { 3964/// typedef tuple<Types&...> type; 3965/// }; 3966/// \endcode 3967/// 3968/// Here, the pack expansion \c Types&... is represented via a 3969/// PackExpansionType whose pattern is Types&. 3970class PackExpansionType : public Type, public llvm::FoldingSetNode { 3971 /// \brief The pattern of the pack expansion. 3972 QualType Pattern; 3973 3974 /// \brief The number of expansions that this pack expansion will 3975 /// generate when substituted (+1), or indicates that 3976 /// 3977 /// This field will only have a non-zero value when some of the parameter 3978 /// packs that occur within the pattern have been substituted but others have 3979 /// not. 3980 unsigned NumExpansions; 3981 3982 PackExpansionType(QualType Pattern, QualType Canon, 3983 llvm::Optional<unsigned> NumExpansions) 3984 : Type(PackExpansion, Canon, /*Dependent=*/true, 3985 /*InstantiationDependent=*/true, 3986 /*VariableModified=*/Pattern->isVariablyModifiedType(), 3987 /*ContainsUnexpandedParameterPack=*/false), 3988 Pattern(Pattern), 3989 NumExpansions(NumExpansions? *NumExpansions + 1: 0) { } 3990 3991 friend class ASTContext; // ASTContext creates these 3992 3993public: 3994 /// \brief Retrieve the pattern of this pack expansion, which is the 3995 /// type that will be repeatedly instantiated when instantiating the 3996 /// pack expansion itself. 3997 QualType getPattern() const { return Pattern; } 3998 3999 /// \brief Retrieve the number of expansions that this pack expansion will 4000 /// generate, if known. 4001 llvm::Optional<unsigned> getNumExpansions() const { 4002 if (NumExpansions) 4003 return NumExpansions - 1; 4004 4005 return llvm::Optional<unsigned>(); 4006 } 4007 4008 bool isSugared() const { return false; } 4009 QualType desugar() const { return QualType(this, 0); } 4010 4011 void Profile(llvm::FoldingSetNodeID &ID) { 4012 Profile(ID, getPattern(), getNumExpansions()); 4013 } 4014 4015 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pattern, 4016 llvm::Optional<unsigned> NumExpansions) { 4017 ID.AddPointer(Pattern.getAsOpaquePtr()); 4018 ID.AddBoolean(NumExpansions); 4019 if (NumExpansions) 4020 ID.AddInteger(*NumExpansions); 4021 } 4022 4023 static bool classof(const Type *T) { 4024 return T->getTypeClass() == PackExpansion; 4025 } 4026 static bool classof(const PackExpansionType *T) { 4027 return true; 4028 } 4029}; 4030 4031/// ObjCObjectType - Represents a class type in Objective C. 4032/// Every Objective C type is a combination of a base type and a 4033/// list of protocols. 4034/// 4035/// Given the following declarations: 4036/// @class C; 4037/// @protocol P; 4038/// 4039/// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType 4040/// with base C and no protocols. 4041/// 4042/// 'C<P>' is an ObjCObjectType with base C and protocol list [P]. 4043/// 4044/// 'id' is a TypedefType which is sugar for an ObjCPointerType whose 4045/// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType 4046/// and no protocols. 4047/// 4048/// 'id<P>' is an ObjCPointerType whose pointee is an ObjCObjecType 4049/// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually 4050/// this should get its own sugar class to better represent the source. 4051class ObjCObjectType : public Type { 4052 // ObjCObjectType.NumProtocols - the number of protocols stored 4053 // after the ObjCObjectPointerType node. 4054 // 4055 // These protocols are those written directly on the type. If 4056 // protocol qualifiers ever become additive, the iterators will need 4057 // to get kindof complicated. 4058 // 4059 // In the canonical object type, these are sorted alphabetically 4060 // and uniqued. 4061 4062 /// Either a BuiltinType or an InterfaceType or sugar for either. 4063 QualType BaseType; 4064 4065 ObjCProtocolDecl * const *getProtocolStorage() const { 4066 return const_cast<ObjCObjectType*>(this)->getProtocolStorage(); 4067 } 4068 4069 ObjCProtocolDecl **getProtocolStorage(); 4070 4071protected: 4072 ObjCObjectType(QualType Canonical, QualType Base, 4073 ObjCProtocolDecl * const *Protocols, unsigned NumProtocols); 4074 4075 enum Nonce_ObjCInterface { Nonce_ObjCInterface }; 4076 ObjCObjectType(enum Nonce_ObjCInterface) 4077 : Type(ObjCInterface, QualType(), false, false, false, false), 4078 BaseType(QualType(this_(), 0)) { 4079 ObjCObjectTypeBits.NumProtocols = 0; 4080 } 4081 4082public: 4083 /// getBaseType - Gets the base type of this object type. This is 4084 /// always (possibly sugar for) one of: 4085 /// - the 'id' builtin type (as opposed to the 'id' type visible to the 4086 /// user, which is a typedef for an ObjCPointerType) 4087 /// - the 'Class' builtin type (same caveat) 4088 /// - an ObjCObjectType (currently always an ObjCInterfaceType) 4089 QualType getBaseType() const { return BaseType; } 4090 4091 bool isObjCId() const { 4092 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); 4093 } 4094 bool isObjCClass() const { 4095 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); 4096 } 4097 bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } 4098 bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } 4099 bool isObjCUnqualifiedIdOrClass() const { 4100 if (!qual_empty()) return false; 4101 if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) 4102 return T->getKind() == BuiltinType::ObjCId || 4103 T->getKind() == BuiltinType::ObjCClass; 4104 return false; 4105 } 4106 bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } 4107 bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } 4108 4109 /// Gets the interface declaration for this object type, if the base type 4110 /// really is an interface. 4111 ObjCInterfaceDecl *getInterface() const; 4112 4113 typedef ObjCProtocolDecl * const *qual_iterator; 4114 4115 qual_iterator qual_begin() const { return getProtocolStorage(); } 4116 qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } 4117 4118 bool qual_empty() const { return getNumProtocols() == 0; } 4119 4120 /// getNumProtocols - Return the number of qualifying protocols in this 4121 /// interface type, or 0 if there are none. 4122 unsigned getNumProtocols() const { return ObjCObjectTypeBits.NumProtocols; } 4123 4124 /// \brief Fetch a protocol by index. 4125 ObjCProtocolDecl *getProtocol(unsigned I) const { 4126 assert(I < getNumProtocols() && "Out-of-range protocol access"); 4127 return qual_begin()[I]; 4128 } 4129 4130 bool isSugared() const { return false; } 4131 QualType desugar() const { return QualType(this, 0); } 4132 4133 static bool classof(const Type *T) { 4134 return T->getTypeClass() == ObjCObject || 4135 T->getTypeClass() == ObjCInterface; 4136 } 4137 static bool classof(const ObjCObjectType *) { return true; } 4138}; 4139 4140/// ObjCObjectTypeImpl - A class providing a concrete implementation 4141/// of ObjCObjectType, so as to not increase the footprint of 4142/// ObjCInterfaceType. Code outside of ASTContext and the core type 4143/// system should not reference this type. 4144class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { 4145 friend class ASTContext; 4146 4147 // If anyone adds fields here, ObjCObjectType::getProtocolStorage() 4148 // will need to be modified. 4149 4150 ObjCObjectTypeImpl(QualType Canonical, QualType Base, 4151 ObjCProtocolDecl * const *Protocols, 4152 unsigned NumProtocols) 4153 : ObjCObjectType(Canonical, Base, Protocols, NumProtocols) {} 4154 4155public: 4156 void Profile(llvm::FoldingSetNodeID &ID); 4157 static void Profile(llvm::FoldingSetNodeID &ID, 4158 QualType Base, 4159 ObjCProtocolDecl *const *protocols, 4160 unsigned NumProtocols); 4161}; 4162 4163inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorage() { 4164 return reinterpret_cast<ObjCProtocolDecl**>( 4165 static_cast<ObjCObjectTypeImpl*>(this) + 1); 4166} 4167 4168/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 4169/// object oriented design. They basically correspond to C++ classes. There 4170/// are two kinds of interface types, normal interfaces like "NSString" and 4171/// qualified interfaces, which are qualified with a protocol list like 4172/// "NSString<NSCopyable, NSAmazing>". 4173/// 4174/// ObjCInterfaceType guarantees the following properties when considered 4175/// as a subtype of its superclass, ObjCObjectType: 4176/// - There are no protocol qualifiers. To reinforce this, code which 4177/// tries to invoke the protocol methods via an ObjCInterfaceType will 4178/// fail to compile. 4179/// - It is its own base type. That is, if T is an ObjCInterfaceType*, 4180/// T->getBaseType() == QualType(T, 0). 4181class ObjCInterfaceType : public ObjCObjectType { 4182 ObjCInterfaceDecl *Decl; 4183 4184 ObjCInterfaceType(const ObjCInterfaceDecl *D) 4185 : ObjCObjectType(Nonce_ObjCInterface), 4186 Decl(const_cast<ObjCInterfaceDecl*>(D)) {} 4187 friend class ASTContext; // ASTContext creates these. 4188 4189public: 4190 /// getDecl - Get the declaration of this interface. 4191 ObjCInterfaceDecl *getDecl() const { return Decl; } 4192 4193 bool isSugared() const { return false; } 4194 QualType desugar() const { return QualType(this, 0); } 4195 4196 static bool classof(const Type *T) { 4197 return T->getTypeClass() == ObjCInterface; 4198 } 4199 static bool classof(const ObjCInterfaceType *) { return true; } 4200 4201 // Nonsense to "hide" certain members of ObjCObjectType within this 4202 // class. People asking for protocols on an ObjCInterfaceType are 4203 // not going to get what they want: ObjCInterfaceTypes are 4204 // guaranteed to have no protocols. 4205 enum { 4206 qual_iterator, 4207 qual_begin, 4208 qual_end, 4209 getNumProtocols, 4210 getProtocol 4211 }; 4212}; 4213 4214inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { 4215 if (const ObjCInterfaceType *T = 4216 getBaseType()->getAs<ObjCInterfaceType>()) 4217 return T->getDecl(); 4218 return 0; 4219} 4220 4221/// ObjCObjectPointerType - Used to represent a pointer to an 4222/// Objective C object. These are constructed from pointer 4223/// declarators when the pointee type is an ObjCObjectType (or sugar 4224/// for one). In addition, the 'id' and 'Class' types are typedefs 4225/// for these, and the protocol-qualified types 'id<P>' and 'Class<P>' 4226/// are translated into these. 4227/// 4228/// Pointers to pointers to Objective C objects are still PointerTypes; 4229/// only the first level of pointer gets it own type implementation. 4230class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 4231 QualType PointeeType; 4232 4233 ObjCObjectPointerType(QualType Canonical, QualType Pointee) 4234 : Type(ObjCObjectPointer, Canonical, false, false, false, false), 4235 PointeeType(Pointee) {} 4236 friend class ASTContext; // ASTContext creates these. 4237 4238public: 4239 /// getPointeeType - Gets the type pointed to by this ObjC pointer. 4240 /// The result will always be an ObjCObjectType or sugar thereof. 4241 QualType getPointeeType() const { return PointeeType; } 4242 4243 /// getObjCObjectType - Gets the type pointed to by this ObjC 4244 /// pointer. This method always returns non-null. 4245 /// 4246 /// This method is equivalent to getPointeeType() except that 4247 /// it discards any typedefs (or other sugar) between this 4248 /// type and the "outermost" object type. So for: 4249 /// @class A; @protocol P; @protocol Q; 4250 /// typedef A<P> AP; 4251 /// typedef A A1; 4252 /// typedef A1<P> A1P; 4253 /// typedef A1P<Q> A1PQ; 4254 /// For 'A*', getObjectType() will return 'A'. 4255 /// For 'A<P>*', getObjectType() will return 'A<P>'. 4256 /// For 'AP*', getObjectType() will return 'A<P>'. 4257 /// For 'A1*', getObjectType() will return 'A'. 4258 /// For 'A1<P>*', getObjectType() will return 'A1<P>'. 4259 /// For 'A1P*', getObjectType() will return 'A1<P>'. 4260 /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because 4261 /// adding protocols to a protocol-qualified base discards the 4262 /// old qualifiers (for now). But if it didn't, getObjectType() 4263 /// would return 'A1P<Q>' (and we'd have to make iterating over 4264 /// qualifiers more complicated). 4265 const ObjCObjectType *getObjectType() const { 4266 return PointeeType->castAs<ObjCObjectType>(); 4267 } 4268 4269 /// getInterfaceType - If this pointer points to an Objective C 4270 /// @interface type, gets the type for that interface. Any protocol 4271 /// qualifiers on the interface are ignored. 4272 /// 4273 /// \return null if the base type for this pointer is 'id' or 'Class' 4274 const ObjCInterfaceType *getInterfaceType() const { 4275 return getObjectType()->getBaseType()->getAs<ObjCInterfaceType>(); 4276 } 4277 4278 /// getInterfaceDecl - If this pointer points to an Objective @interface 4279 /// type, gets the declaration for that interface. 4280 /// 4281 /// \return null if the base type for this pointer is 'id' or 'Class' 4282 ObjCInterfaceDecl *getInterfaceDecl() const { 4283 return getObjectType()->getInterface(); 4284 } 4285 4286 /// isObjCIdType - True if this is equivalent to the 'id' type, i.e. if 4287 /// its object type is the primitive 'id' type with no protocols. 4288 bool isObjCIdType() const { 4289 return getObjectType()->isObjCUnqualifiedId(); 4290 } 4291 4292 /// isObjCClassType - True if this is equivalent to the 'Class' type, 4293 /// i.e. if its object tive is the primitive 'Class' type with no protocols. 4294 bool isObjCClassType() const { 4295 return getObjectType()->isObjCUnqualifiedClass(); 4296 } 4297 4298 /// isObjCQualifiedIdType - True if this is equivalent to 'id<P>' for some 4299 /// non-empty set of protocols. 4300 bool isObjCQualifiedIdType() const { 4301 return getObjectType()->isObjCQualifiedId(); 4302 } 4303 4304 /// isObjCQualifiedClassType - True if this is equivalent to 'Class<P>' for 4305 /// some non-empty set of protocols. 4306 bool isObjCQualifiedClassType() const { 4307 return getObjectType()->isObjCQualifiedClass(); 4308 } 4309 4310 /// An iterator over the qualifiers on the object type. Provided 4311 /// for convenience. This will always iterate over the full set of 4312 /// protocols on a type, not just those provided directly. 4313 typedef ObjCObjectType::qual_iterator qual_iterator; 4314 4315 qual_iterator qual_begin() const { 4316 return getObjectType()->qual_begin(); 4317 } 4318 qual_iterator qual_end() const { 4319 return getObjectType()->qual_end(); 4320 } 4321 bool qual_empty() const { return getObjectType()->qual_empty(); } 4322 4323 /// getNumProtocols - Return the number of qualifying protocols on 4324 /// the object type. 4325 unsigned getNumProtocols() const { 4326 return getObjectType()->getNumProtocols(); 4327 } 4328 4329 /// \brief Retrieve a qualifying protocol by index on the object 4330 /// type. 4331 ObjCProtocolDecl *getProtocol(unsigned I) const { 4332 return getObjectType()->getProtocol(I); 4333 } 4334 4335 bool isSugared() const { return false; } 4336 QualType desugar() const { return QualType(this, 0); } 4337 4338 void Profile(llvm::FoldingSetNodeID &ID) { 4339 Profile(ID, getPointeeType()); 4340 } 4341 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 4342 ID.AddPointer(T.getAsOpaquePtr()); 4343 } 4344 static bool classof(const Type *T) { 4345 return T->getTypeClass() == ObjCObjectPointer; 4346 } 4347 static bool classof(const ObjCObjectPointerType *) { return true; } 4348}; 4349 4350/// A qualifier set is used to build a set of qualifiers. 4351class QualifierCollector : public Qualifiers { 4352public: 4353 QualifierCollector(Qualifiers Qs = Qualifiers()) : Qualifiers(Qs) {} 4354 4355 /// Collect any qualifiers on the given type and return an 4356 /// unqualified type. The qualifiers are assumed to be consistent 4357 /// with those already in the type. 4358 const Type *strip(QualType type) { 4359 addFastQualifiers(type.getLocalFastQualifiers()); 4360 if (!type.hasLocalNonFastQualifiers()) 4361 return type.getTypePtrUnsafe(); 4362 4363 const ExtQuals *extQuals = type.getExtQualsUnsafe(); 4364 addConsistentQualifiers(extQuals->getQualifiers()); 4365 return extQuals->getBaseType(); 4366 } 4367 4368 /// Apply the collected qualifiers to the given type. 4369 QualType apply(const ASTContext &Context, QualType QT) const; 4370 4371 /// Apply the collected qualifiers to the given type. 4372 QualType apply(const ASTContext &Context, const Type* T) const; 4373}; 4374 4375 4376// Inline function definitions. 4377 4378inline const Type *QualType::getTypePtr() const { 4379 return getCommonPtr()->BaseType; 4380} 4381 4382inline const Type *QualType::getTypePtrOrNull() const { 4383 return (isNull() ? 0 : getCommonPtr()->BaseType); 4384} 4385 4386inline SplitQualType QualType::split() const { 4387 if (!hasLocalNonFastQualifiers()) 4388 return SplitQualType(getTypePtrUnsafe(), 4389 Qualifiers::fromFastMask(getLocalFastQualifiers())); 4390 4391 const ExtQuals *eq = getExtQualsUnsafe(); 4392 Qualifiers qs = eq->getQualifiers(); 4393 qs.addFastQualifiers(getLocalFastQualifiers()); 4394 return SplitQualType(eq->getBaseType(), qs); 4395} 4396 4397inline Qualifiers QualType::getLocalQualifiers() const { 4398 Qualifiers Quals; 4399 if (hasLocalNonFastQualifiers()) 4400 Quals = getExtQualsUnsafe()->getQualifiers(); 4401 Quals.addFastQualifiers(getLocalFastQualifiers()); 4402 return Quals; 4403} 4404 4405inline Qualifiers QualType::getQualifiers() const { 4406 Qualifiers quals = getCommonPtr()->CanonicalType.getLocalQualifiers(); 4407 quals.addFastQualifiers(getLocalFastQualifiers()); 4408 return quals; 4409} 4410 4411inline unsigned QualType::getCVRQualifiers() const { 4412 unsigned cvr = getCommonPtr()->CanonicalType.getLocalCVRQualifiers(); 4413 cvr |= getLocalCVRQualifiers(); 4414 return cvr; 4415} 4416 4417inline QualType QualType::getCanonicalType() const { 4418 QualType canon = getCommonPtr()->CanonicalType; 4419 return canon.withFastQualifiers(getLocalFastQualifiers()); 4420} 4421 4422inline bool QualType::isCanonical() const { 4423 return getTypePtr()->isCanonicalUnqualified(); 4424} 4425 4426inline bool QualType::isCanonicalAsParam() const { 4427 if (!isCanonical()) return false; 4428 if (hasLocalQualifiers()) return false; 4429 4430 const Type *T = getTypePtr(); 4431 if (T->isVariablyModifiedType() && T->hasSizedVLAType()) 4432 return false; 4433 4434 return !isa<FunctionType>(T) && !isa<ArrayType>(T); 4435} 4436 4437inline bool QualType::isConstQualified() const { 4438 return isLocalConstQualified() || 4439 getCommonPtr()->CanonicalType.isLocalConstQualified(); 4440} 4441 4442inline bool QualType::isRestrictQualified() const { 4443 return isLocalRestrictQualified() || 4444 getCommonPtr()->CanonicalType.isLocalRestrictQualified(); 4445} 4446 4447 4448inline bool QualType::isVolatileQualified() const { 4449 return isLocalVolatileQualified() || 4450 getCommonPtr()->CanonicalType.isLocalVolatileQualified(); 4451} 4452 4453inline bool QualType::hasQualifiers() const { 4454 return hasLocalQualifiers() || 4455 getCommonPtr()->CanonicalType.hasLocalQualifiers(); 4456} 4457 4458inline QualType QualType::getUnqualifiedType() const { 4459 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4460 return QualType(getTypePtr(), 0); 4461 4462 return QualType(getSplitUnqualifiedTypeImpl(*this).first, 0); 4463} 4464 4465inline SplitQualType QualType::getSplitUnqualifiedType() const { 4466 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4467 return split(); 4468 4469 return getSplitUnqualifiedTypeImpl(*this); 4470} 4471 4472inline void QualType::removeLocalConst() { 4473 removeLocalFastQualifiers(Qualifiers::Const); 4474} 4475 4476inline void QualType::removeLocalRestrict() { 4477 removeLocalFastQualifiers(Qualifiers::Restrict); 4478} 4479 4480inline void QualType::removeLocalVolatile() { 4481 removeLocalFastQualifiers(Qualifiers::Volatile); 4482} 4483 4484inline void QualType::removeLocalCVRQualifiers(unsigned Mask) { 4485 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 4486 assert((int)Qualifiers::CVRMask == (int)Qualifiers::FastMask); 4487 4488 // Fast path: we don't need to touch the slow qualifiers. 4489 removeLocalFastQualifiers(Mask); 4490} 4491 4492/// getAddressSpace - Return the address space of this type. 4493inline unsigned QualType::getAddressSpace() const { 4494 return getQualifiers().getAddressSpace(); 4495} 4496 4497/// getObjCGCAttr - Return the gc attribute of this type. 4498inline Qualifiers::GC QualType::getObjCGCAttr() const { 4499 return getQualifiers().getObjCGCAttr(); 4500} 4501 4502inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { 4503 if (const PointerType *PT = t.getAs<PointerType>()) { 4504 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 4505 return FT->getExtInfo(); 4506 } else if (const FunctionType *FT = t.getAs<FunctionType>()) 4507 return FT->getExtInfo(); 4508 4509 return FunctionType::ExtInfo(); 4510} 4511 4512inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { 4513 return getFunctionExtInfo(*t); 4514} 4515 4516/// isMoreQualifiedThan - Determine whether this type is more 4517/// qualified than the Other type. For example, "const volatile int" 4518/// is more qualified than "const int", "volatile int", and 4519/// "int". However, it is not more qualified than "const volatile 4520/// int". 4521inline bool QualType::isMoreQualifiedThan(QualType other) const { 4522 Qualifiers myQuals = getQualifiers(); 4523 Qualifiers otherQuals = other.getQualifiers(); 4524 return (myQuals != otherQuals && myQuals.compatiblyIncludes(otherQuals)); 4525} 4526 4527/// isAtLeastAsQualifiedAs - Determine whether this type is at last 4528/// as qualified as the Other type. For example, "const volatile 4529/// int" is at least as qualified as "const int", "volatile int", 4530/// "int", and "const volatile int". 4531inline bool QualType::isAtLeastAsQualifiedAs(QualType other) const { 4532 return getQualifiers().compatiblyIncludes(other.getQualifiers()); 4533} 4534 4535/// getNonReferenceType - If Type is a reference type (e.g., const 4536/// int&), returns the type that the reference refers to ("const 4537/// int"). Otherwise, returns the type itself. This routine is used 4538/// throughout Sema to implement C++ 5p6: 4539/// 4540/// If an expression initially has the type "reference to T" (8.3.2, 4541/// 8.5.3), the type is adjusted to "T" prior to any further 4542/// analysis, the expression designates the object or function 4543/// denoted by the reference, and the expression is an lvalue. 4544inline QualType QualType::getNonReferenceType() const { 4545 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 4546 return RefType->getPointeeType(); 4547 else 4548 return *this; 4549} 4550 4551inline bool QualType::isCForbiddenLValueType() const { 4552 return ((getTypePtr()->isVoidType() && !hasQualifiers()) || 4553 getTypePtr()->isFunctionType()); 4554} 4555 4556/// \brief Tests whether the type is categorized as a fundamental type. 4557/// 4558/// \returns True for types specified in C++0x [basic.fundamental]. 4559inline bool Type::isFundamentalType() const { 4560 return isVoidType() || 4561 // FIXME: It's really annoying that we don't have an 4562 // 'isArithmeticType()' which agrees with the standard definition. 4563 (isArithmeticType() && !isEnumeralType()); 4564} 4565 4566/// \brief Tests whether the type is categorized as a compound type. 4567/// 4568/// \returns True for types specified in C++0x [basic.compound]. 4569inline bool Type::isCompoundType() const { 4570 // C++0x [basic.compound]p1: 4571 // Compound types can be constructed in the following ways: 4572 // -- arrays of objects of a given type [...]; 4573 return isArrayType() || 4574 // -- functions, which have parameters of given types [...]; 4575 isFunctionType() || 4576 // -- pointers to void or objects or functions [...]; 4577 isPointerType() || 4578 // -- references to objects or functions of a given type. [...] 4579 isReferenceType() || 4580 // -- classes containing a sequence of objects of various types, [...]; 4581 isRecordType() || 4582 // -- unions, which ar classes capable of containing objects of different types at different times; 4583 isUnionType() || 4584 // -- enumerations, which comprise a set of named constant values. [...]; 4585 isEnumeralType() || 4586 // -- pointers to non-static class members, [...]. 4587 isMemberPointerType(); 4588} 4589 4590inline bool Type::isFunctionType() const { 4591 return isa<FunctionType>(CanonicalType); 4592} 4593inline bool Type::isPointerType() const { 4594 return isa<PointerType>(CanonicalType); 4595} 4596inline bool Type::isAnyPointerType() const { 4597 return isPointerType() || isObjCObjectPointerType(); 4598} 4599inline bool Type::isBlockPointerType() const { 4600 return isa<BlockPointerType>(CanonicalType); 4601} 4602inline bool Type::isReferenceType() const { 4603 return isa<ReferenceType>(CanonicalType); 4604} 4605inline bool Type::isLValueReferenceType() const { 4606 return isa<LValueReferenceType>(CanonicalType); 4607} 4608inline bool Type::isRValueReferenceType() const { 4609 return isa<RValueReferenceType>(CanonicalType); 4610} 4611inline bool Type::isFunctionPointerType() const { 4612 if (const PointerType *T = getAs<PointerType>()) 4613 return T->getPointeeType()->isFunctionType(); 4614 else 4615 return false; 4616} 4617inline bool Type::isMemberPointerType() const { 4618 return isa<MemberPointerType>(CanonicalType); 4619} 4620inline bool Type::isMemberFunctionPointerType() const { 4621 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4622 return T->isMemberFunctionPointer(); 4623 else 4624 return false; 4625} 4626inline bool Type::isMemberDataPointerType() const { 4627 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4628 return T->isMemberDataPointer(); 4629 else 4630 return false; 4631} 4632inline bool Type::isArrayType() const { 4633 return isa<ArrayType>(CanonicalType); 4634} 4635inline bool Type::isConstantArrayType() const { 4636 return isa<ConstantArrayType>(CanonicalType); 4637} 4638inline bool Type::isIncompleteArrayType() const { 4639 return isa<IncompleteArrayType>(CanonicalType); 4640} 4641inline bool Type::isVariableArrayType() const { 4642 return isa<VariableArrayType>(CanonicalType); 4643} 4644inline bool Type::isDependentSizedArrayType() const { 4645 return isa<DependentSizedArrayType>(CanonicalType); 4646} 4647inline bool Type::isBuiltinType() const { 4648 return isa<BuiltinType>(CanonicalType); 4649} 4650inline bool Type::isRecordType() const { 4651 return isa<RecordType>(CanonicalType); 4652} 4653inline bool Type::isEnumeralType() const { 4654 return isa<EnumType>(CanonicalType); 4655} 4656inline bool Type::isAnyComplexType() const { 4657 return isa<ComplexType>(CanonicalType); 4658} 4659inline bool Type::isVectorType() const { 4660 return isa<VectorType>(CanonicalType); 4661} 4662inline bool Type::isExtVectorType() const { 4663 return isa<ExtVectorType>(CanonicalType); 4664} 4665inline bool Type::isObjCObjectPointerType() const { 4666 return isa<ObjCObjectPointerType>(CanonicalType); 4667} 4668inline bool Type::isObjCObjectType() const { 4669 return isa<ObjCObjectType>(CanonicalType); 4670} 4671inline bool Type::isObjCObjectOrInterfaceType() const { 4672 return isa<ObjCInterfaceType>(CanonicalType) || 4673 isa<ObjCObjectType>(CanonicalType); 4674} 4675 4676inline bool Type::isObjCQualifiedIdType() const { 4677 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4678 return OPT->isObjCQualifiedIdType(); 4679 return false; 4680} 4681inline bool Type::isObjCQualifiedClassType() const { 4682 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4683 return OPT->isObjCQualifiedClassType(); 4684 return false; 4685} 4686inline bool Type::isObjCIdType() const { 4687 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4688 return OPT->isObjCIdType(); 4689 return false; 4690} 4691inline bool Type::isObjCClassType() const { 4692 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4693 return OPT->isObjCClassType(); 4694 return false; 4695} 4696inline bool Type::isObjCSelType() const { 4697 if (const PointerType *OPT = getAs<PointerType>()) 4698 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 4699 return false; 4700} 4701inline bool Type::isObjCBuiltinType() const { 4702 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 4703} 4704inline bool Type::isTemplateTypeParmType() const { 4705 return isa<TemplateTypeParmType>(CanonicalType); 4706} 4707 4708inline bool Type::isSpecificBuiltinType(unsigned K) const { 4709 if (const BuiltinType *BT = getAs<BuiltinType>()) 4710 if (BT->getKind() == (BuiltinType::Kind) K) 4711 return true; 4712 return false; 4713} 4714 4715inline bool Type::isPlaceholderType() const { 4716 if (const BuiltinType *BT = getAs<BuiltinType>()) 4717 return BT->isPlaceholderType(); 4718 return false; 4719} 4720 4721inline bool Type::isSpecificPlaceholderType(unsigned K) const { 4722 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4723 return (BT->getKind() == (BuiltinType::Kind) K); 4724 return false; 4725} 4726 4727/// \brief Determines whether this is a type for which one can define 4728/// an overloaded operator. 4729inline bool Type::isOverloadableType() const { 4730 return isDependentType() || isRecordType() || isEnumeralType(); 4731} 4732 4733/// \brief Determines whether this type can decay to a pointer type. 4734inline bool Type::canDecayToPointerType() const { 4735 return isFunctionType() || isArrayType(); 4736} 4737 4738inline bool Type::hasPointerRepresentation() const { 4739 return (isPointerType() || isReferenceType() || isBlockPointerType() || 4740 isObjCObjectPointerType() || isNullPtrType()); 4741} 4742 4743inline bool Type::hasObjCPointerRepresentation() const { 4744 return isObjCObjectPointerType(); 4745} 4746 4747inline const Type *Type::getBaseElementTypeUnsafe() const { 4748 const Type *type = this; 4749 while (const ArrayType *arrayType = type->getAsArrayTypeUnsafe()) 4750 type = arrayType->getElementType().getTypePtr(); 4751 return type; 4752} 4753 4754/// Insertion operator for diagnostics. This allows sending QualType's into a 4755/// diagnostic with <<. 4756inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 4757 QualType T) { 4758 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 4759 Diagnostic::ak_qualtype); 4760 return DB; 4761} 4762 4763/// Insertion operator for partial diagnostics. This allows sending QualType's 4764/// into a diagnostic with <<. 4765inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, 4766 QualType T) { 4767 PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 4768 Diagnostic::ak_qualtype); 4769 return PD; 4770} 4771 4772// Helper class template that is used by Type::getAs to ensure that one does 4773// not try to look through a qualified type to get to an array type. 4774template<typename T, 4775 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 4776 llvm::is_base_of<ArrayType, T>::value)> 4777struct ArrayType_cannot_be_used_with_getAs { }; 4778 4779template<typename T> 4780struct ArrayType_cannot_be_used_with_getAs<T, true>; 4781 4782/// Member-template getAs<specific type>'. 4783template <typename T> const T *Type::getAs() const { 4784 ArrayType_cannot_be_used_with_getAs<T> at; 4785 (void)at; 4786 4787 // If this is directly a T type, return it. 4788 if (const T *Ty = dyn_cast<T>(this)) 4789 return Ty; 4790 4791 // If the canonical form of this type isn't the right kind, reject it. 4792 if (!isa<T>(CanonicalType)) 4793 return 0; 4794 4795 // If this is a typedef for the type, strip the typedef off without 4796 // losing all typedef information. 4797 return cast<T>(getUnqualifiedDesugaredType()); 4798} 4799 4800inline const ArrayType *Type::getAsArrayTypeUnsafe() const { 4801 // If this is directly an array type, return it. 4802 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) 4803 return arr; 4804 4805 // If the canonical form of this type isn't the right kind, reject it. 4806 if (!isa<ArrayType>(CanonicalType)) 4807 return 0; 4808 4809 // If this is a typedef for the type, strip the typedef off without 4810 // losing all typedef information. 4811 return cast<ArrayType>(getUnqualifiedDesugaredType()); 4812} 4813 4814template <typename T> const T *Type::castAs() const { 4815 ArrayType_cannot_be_used_with_getAs<T> at; 4816 (void) at; 4817 4818 assert(isa<T>(CanonicalType)); 4819 if (const T *ty = dyn_cast<T>(this)) return ty; 4820 return cast<T>(getUnqualifiedDesugaredType()); 4821} 4822 4823inline const ArrayType *Type::castAsArrayTypeUnsafe() const { 4824 assert(isa<ArrayType>(CanonicalType)); 4825 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) return arr; 4826 return cast<ArrayType>(getUnqualifiedDesugaredType()); 4827} 4828 4829} // end namespace clang 4830 4831#endif 4832