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/AST/NestedNameSpecifier.h" 18 #include "clang/AST/TemplateName.h" 19 #include "clang/Basic/Diagnostic.h" 20 #include "clang/Basic/ExceptionSpecificationType.h" 21 #include "clang/Basic/IdentifierTable.h" 22 #include "clang/Basic/LLVM.h" 23 #include "clang/Basic/Linkage.h" 24 #include "clang/Basic/PartialDiagnostic.h" 25 #include "clang/Basic/Specifiers.h" 26 #include "clang/Basic/Visibility.h" 27 #include "llvm/ADT/APSInt.h" 28 #include "llvm/ADT/FoldingSet.h" 29 #include "llvm/ADT/Optional.h" 30 #include "llvm/ADT/PointerIntPair.h" 31 #include "llvm/ADT/PointerUnion.h" 32 #include "llvm/ADT/Twine.h" 33 #include "llvm/Support/ErrorHandling.h" 34 #include "llvm/Support/type_traits.h" 35 36 namespace clang { 37 enum { 38 TypeAlignmentInBits = 4, 39 TypeAlignment = 1 << TypeAlignmentInBits 40 }; 41 class Type; 42 class ExtQuals; 43 class QualType; 44 } 45 46 namespace llvm { 47 template <typename T> 48 class PointerLikeTypeTraits; 49 template<> 50 class PointerLikeTypeTraits< ::clang::Type*> { 51 public: 52 static inline void *getAsVoidPointer(::clang::Type *P) { return P; } 53 static inline ::clang::Type *getFromVoidPointer(void *P) { 54 return static_cast< ::clang::Type*>(P); 55 } 56 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 57 }; 58 template<> 59 class PointerLikeTypeTraits< ::clang::ExtQuals*> { 60 public: 61 static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; } 62 static inline ::clang::ExtQuals *getFromVoidPointer(void *P) { 63 return static_cast< ::clang::ExtQuals*>(P); 64 } 65 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 66 }; 67 68 template <> 69 struct isPodLike<clang::QualType> { static const bool value = true; }; 70 } 71 72 namespace clang { 73 class ASTContext; 74 class TypedefNameDecl; 75 class TemplateDecl; 76 class TemplateTypeParmDecl; 77 class NonTypeTemplateParmDecl; 78 class TemplateTemplateParmDecl; 79 class TagDecl; 80 class RecordDecl; 81 class CXXRecordDecl; 82 class EnumDecl; 83 class FieldDecl; 84 class FunctionDecl; 85 class ObjCInterfaceDecl; 86 class ObjCProtocolDecl; 87 class ObjCMethodDecl; 88 class UnresolvedUsingTypenameDecl; 89 class Expr; 90 class Stmt; 91 class SourceLocation; 92 class StmtIteratorBase; 93 class TemplateArgument; 94 class TemplateArgumentLoc; 95 class TemplateArgumentListInfo; 96 class ElaboratedType; 97 class ExtQuals; 98 class ExtQualsTypeCommonBase; 99 struct PrintingPolicy; 100 101 template <typename> class CanQual; 102 typedef CanQual<Type> CanQualType; 103 104 // Provide forward declarations for all of the *Type classes 105 #define TYPE(Class, Base) class Class##Type; 106 #include "clang/AST/TypeNodes.def" 107 108 /// Qualifiers - The collection of all-type qualifiers we support. 109 /// Clang supports five independent qualifiers: 110 /// * C99: const, volatile, and restrict 111 /// * Embedded C (TR18037): address spaces 112 /// * Objective C: the GC attributes (none, weak, or strong) 113 class Qualifiers { 114 public: 115 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 116 Const = 0x1, 117 Restrict = 0x2, 118 Volatile = 0x4, 119 CVRMask = Const | Volatile | Restrict 120 }; 121 122 enum GC { 123 GCNone = 0, 124 Weak, 125 Strong 126 }; 127 128 enum ObjCLifetime { 129 /// There is no lifetime qualification on this type. 130 OCL_None, 131 132 /// This object can be modified without requiring retains or 133 /// releases. 134 OCL_ExplicitNone, 135 136 /// Assigning into this object requires the old value to be 137 /// released and the new value to be retained. The timing of the 138 /// release of the old value is inexact: it may be moved to 139 /// immediately after the last known point where the value is 140 /// live. 141 OCL_Strong, 142 143 /// Reading or writing from this object requires a barrier call. 144 OCL_Weak, 145 146 /// Assigning into this object requires a lifetime extension. 147 OCL_Autoreleasing 148 }; 149 150 enum { 151 /// The maximum supported address space number. 152 /// 24 bits should be enough for anyone. 153 MaxAddressSpace = 0xffffffu, 154 155 /// The width of the "fast" qualifier mask. 156 FastWidth = 3, 157 158 /// The fast qualifier mask. 159 FastMask = (1 << FastWidth) - 1 160 }; 161 162 Qualifiers() : Mask(0) {} 163 164 /// \brief Returns the common set of qualifiers while removing them from 165 /// the given sets. 166 static Qualifiers removeCommonQualifiers(Qualifiers &L, Qualifiers &R) { 167 // If both are only CVR-qualified, bit operations are sufficient. 168 if (!(L.Mask & ~CVRMask) && !(R.Mask & ~CVRMask)) { 169 Qualifiers Q; 170 Q.Mask = L.Mask & R.Mask; 171 L.Mask &= ~Q.Mask; 172 R.Mask &= ~Q.Mask; 173 return Q; 174 } 175 176 Qualifiers Q; 177 unsigned CommonCRV = L.getCVRQualifiers() & R.getCVRQualifiers(); 178 Q.addCVRQualifiers(CommonCRV); 179 L.removeCVRQualifiers(CommonCRV); 180 R.removeCVRQualifiers(CommonCRV); 181 182 if (L.getObjCGCAttr() == R.getObjCGCAttr()) { 183 Q.setObjCGCAttr(L.getObjCGCAttr()); 184 L.removeObjCGCAttr(); 185 R.removeObjCGCAttr(); 186 } 187 188 if (L.getObjCLifetime() == R.getObjCLifetime()) { 189 Q.setObjCLifetime(L.getObjCLifetime()); 190 L.removeObjCLifetime(); 191 R.removeObjCLifetime(); 192 } 193 194 if (L.getAddressSpace() == R.getAddressSpace()) { 195 Q.setAddressSpace(L.getAddressSpace()); 196 L.removeAddressSpace(); 197 R.removeAddressSpace(); 198 } 199 return Q; 200 } 201 202 static Qualifiers fromFastMask(unsigned Mask) { 203 Qualifiers Qs; 204 Qs.addFastQualifiers(Mask); 205 return Qs; 206 } 207 208 static Qualifiers fromCVRMask(unsigned CVR) { 209 Qualifiers Qs; 210 Qs.addCVRQualifiers(CVR); 211 return Qs; 212 } 213 214 // Deserialize qualifiers from an opaque representation. 215 static Qualifiers fromOpaqueValue(unsigned opaque) { 216 Qualifiers Qs; 217 Qs.Mask = opaque; 218 return Qs; 219 } 220 221 // Serialize these qualifiers into an opaque representation. 222 unsigned getAsOpaqueValue() const { 223 return Mask; 224 } 225 226 bool hasConst() const { return Mask & Const; } 227 void setConst(bool flag) { 228 Mask = (Mask & ~Const) | (flag ? Const : 0); 229 } 230 void removeConst() { Mask &= ~Const; } 231 void addConst() { Mask |= Const; } 232 233 bool hasVolatile() const { return Mask & Volatile; } 234 void setVolatile(bool flag) { 235 Mask = (Mask & ~Volatile) | (flag ? Volatile : 0); 236 } 237 void removeVolatile() { Mask &= ~Volatile; } 238 void addVolatile() { Mask |= Volatile; } 239 240 bool hasRestrict() const { return Mask & Restrict; } 241 void setRestrict(bool flag) { 242 Mask = (Mask & ~Restrict) | (flag ? Restrict : 0); 243 } 244 void removeRestrict() { Mask &= ~Restrict; } 245 void addRestrict() { Mask |= Restrict; } 246 247 bool hasCVRQualifiers() const { return getCVRQualifiers(); } 248 unsigned getCVRQualifiers() const { return Mask & CVRMask; } 249 void setCVRQualifiers(unsigned mask) { 250 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 251 Mask = (Mask & ~CVRMask) | mask; 252 } 253 void removeCVRQualifiers(unsigned mask) { 254 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 255 Mask &= ~mask; 256 } 257 void removeCVRQualifiers() { 258 removeCVRQualifiers(CVRMask); 259 } 260 void addCVRQualifiers(unsigned mask) { 261 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 262 Mask |= mask; 263 } 264 265 bool hasObjCGCAttr() const { return Mask & GCAttrMask; } 266 GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); } 267 void setObjCGCAttr(GC type) { 268 Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift); 269 } 270 void removeObjCGCAttr() { setObjCGCAttr(GCNone); } 271 void addObjCGCAttr(GC type) { 272 assert(type); 273 setObjCGCAttr(type); 274 } 275 Qualifiers withoutObjCGCAttr() const { 276 Qualifiers qs = *this; 277 qs.removeObjCGCAttr(); 278 return qs; 279 } 280 Qualifiers withoutObjCLifetime() const { 281 Qualifiers qs = *this; 282 qs.removeObjCLifetime(); 283 return qs; 284 } 285 286 bool hasObjCLifetime() const { return Mask & LifetimeMask; } 287 ObjCLifetime getObjCLifetime() const { 288 return ObjCLifetime((Mask & LifetimeMask) >> LifetimeShift); 289 } 290 void setObjCLifetime(ObjCLifetime type) { 291 Mask = (Mask & ~LifetimeMask) | (type << LifetimeShift); 292 } 293 void removeObjCLifetime() { setObjCLifetime(OCL_None); } 294 void addObjCLifetime(ObjCLifetime type) { 295 assert(type); 296 assert(!hasObjCLifetime()); 297 Mask |= (type << LifetimeShift); 298 } 299 300 /// True if the lifetime is neither None or ExplicitNone. 301 bool hasNonTrivialObjCLifetime() const { 302 ObjCLifetime lifetime = getObjCLifetime(); 303 return (lifetime > OCL_ExplicitNone); 304 } 305 306 /// True if the lifetime is either strong or weak. 307 bool hasStrongOrWeakObjCLifetime() const { 308 ObjCLifetime lifetime = getObjCLifetime(); 309 return (lifetime == OCL_Strong || lifetime == OCL_Weak); 310 } 311 312 bool hasAddressSpace() const { return Mask & AddressSpaceMask; } 313 unsigned getAddressSpace() const { return Mask >> AddressSpaceShift; } 314 void setAddressSpace(unsigned space) { 315 assert(space <= MaxAddressSpace); 316 Mask = (Mask & ~AddressSpaceMask) 317 | (((uint32_t) space) << AddressSpaceShift); 318 } 319 void removeAddressSpace() { setAddressSpace(0); } 320 void addAddressSpace(unsigned space) { 321 assert(space); 322 setAddressSpace(space); 323 } 324 325 // Fast qualifiers are those that can be allocated directly 326 // on a QualType object. 327 bool hasFastQualifiers() const { return getFastQualifiers(); } 328 unsigned getFastQualifiers() const { return Mask & FastMask; } 329 void setFastQualifiers(unsigned mask) { 330 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 331 Mask = (Mask & ~FastMask) | mask; 332 } 333 void removeFastQualifiers(unsigned mask) { 334 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 335 Mask &= ~mask; 336 } 337 void removeFastQualifiers() { 338 removeFastQualifiers(FastMask); 339 } 340 void addFastQualifiers(unsigned mask) { 341 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 342 Mask |= mask; 343 } 344 345 /// hasNonFastQualifiers - Return true if the set contains any 346 /// qualifiers which require an ExtQuals node to be allocated. 347 bool hasNonFastQualifiers() const { return Mask & ~FastMask; } 348 Qualifiers getNonFastQualifiers() const { 349 Qualifiers Quals = *this; 350 Quals.setFastQualifiers(0); 351 return Quals; 352 } 353 354 /// hasQualifiers - Return true if the set contains any qualifiers. 355 bool hasQualifiers() const { return Mask; } 356 bool empty() const { return !Mask; } 357 358 /// \brief Add the qualifiers from the given set to this set. 359 void addQualifiers(Qualifiers Q) { 360 // If the other set doesn't have any non-boolean qualifiers, just 361 // bit-or it in. 362 if (!(Q.Mask & ~CVRMask)) 363 Mask |= Q.Mask; 364 else { 365 Mask |= (Q.Mask & CVRMask); 366 if (Q.hasAddressSpace()) 367 addAddressSpace(Q.getAddressSpace()); 368 if (Q.hasObjCGCAttr()) 369 addObjCGCAttr(Q.getObjCGCAttr()); 370 if (Q.hasObjCLifetime()) 371 addObjCLifetime(Q.getObjCLifetime()); 372 } 373 } 374 375 /// \brief Remove the qualifiers from the given set from this set. 376 void removeQualifiers(Qualifiers Q) { 377 // If the other set doesn't have any non-boolean qualifiers, just 378 // bit-and the inverse in. 379 if (!(Q.Mask & ~CVRMask)) 380 Mask &= ~Q.Mask; 381 else { 382 Mask &= ~(Q.Mask & CVRMask); 383 if (getObjCGCAttr() == Q.getObjCGCAttr()) 384 removeObjCGCAttr(); 385 if (getObjCLifetime() == Q.getObjCLifetime()) 386 removeObjCLifetime(); 387 if (getAddressSpace() == Q.getAddressSpace()) 388 removeAddressSpace(); 389 } 390 } 391 392 /// \brief Add the qualifiers from the given set to this set, given that 393 /// they don't conflict. 394 void addConsistentQualifiers(Qualifiers qs) { 395 assert(getAddressSpace() == qs.getAddressSpace() || 396 !hasAddressSpace() || !qs.hasAddressSpace()); 397 assert(getObjCGCAttr() == qs.getObjCGCAttr() || 398 !hasObjCGCAttr() || !qs.hasObjCGCAttr()); 399 assert(getObjCLifetime() == qs.getObjCLifetime() || 400 !hasObjCLifetime() || !qs.hasObjCLifetime()); 401 Mask |= qs.Mask; 402 } 403 404 /// \brief Determines if these qualifiers compatibly include another set. 405 /// Generally this answers the question of whether an object with the other 406 /// qualifiers can be safely used as an object with these qualifiers. 407 bool compatiblyIncludes(Qualifiers other) const { 408 return 409 // Address spaces must match exactly. 410 getAddressSpace() == other.getAddressSpace() && 411 // ObjC GC qualifiers can match, be added, or be removed, but can't be 412 // changed. 413 (getObjCGCAttr() == other.getObjCGCAttr() || 414 !hasObjCGCAttr() || !other.hasObjCGCAttr()) && 415 // ObjC lifetime qualifiers must match exactly. 416 getObjCLifetime() == other.getObjCLifetime() && 417 // CVR qualifiers may subset. 418 (((Mask & CVRMask) | (other.Mask & CVRMask)) == (Mask & CVRMask)); 419 } 420 421 /// \brief Determines if these qualifiers compatibly include another set of 422 /// qualifiers from the narrow perspective of Objective-C ARC lifetime. 423 /// 424 /// One set of Objective-C lifetime qualifiers compatibly includes the other 425 /// if the lifetime qualifiers match, or if both are non-__weak and the 426 /// including set also contains the 'const' qualifier. 427 bool compatiblyIncludesObjCLifetime(Qualifiers other) const { 428 if (getObjCLifetime() == other.getObjCLifetime()) 429 return true; 430 431 if (getObjCLifetime() == OCL_Weak || other.getObjCLifetime() == OCL_Weak) 432 return false; 433 434 return hasConst(); 435 } 436 437 /// \brief Determine whether this set of qualifiers is a strict superset of 438 /// another set of qualifiers, not considering qualifier compatibility. 439 bool isStrictSupersetOf(Qualifiers Other) const; 440 441 bool operator==(Qualifiers Other) const { return Mask == Other.Mask; } 442 bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; } 443 444 operator bool() const { return hasQualifiers(); } 445 446 Qualifiers &operator+=(Qualifiers R) { 447 addQualifiers(R); 448 return *this; 449 } 450 451 // Union two qualifier sets. If an enumerated qualifier appears 452 // in both sets, use the one from the right. 453 friend Qualifiers operator+(Qualifiers L, Qualifiers R) { 454 L += R; 455 return L; 456 } 457 458 Qualifiers &operator-=(Qualifiers R) { 459 removeQualifiers(R); 460 return *this; 461 } 462 463 /// \brief Compute the difference between two qualifier sets. 464 friend Qualifiers operator-(Qualifiers L, Qualifiers R) { 465 L -= R; 466 return L; 467 } 468 469 std::string getAsString() const; 470 std::string getAsString(const PrintingPolicy &Policy) const; 471 472 bool isEmptyWhenPrinted(const PrintingPolicy &Policy) const; 473 void print(raw_ostream &OS, const PrintingPolicy &Policy, 474 bool appendSpaceIfNonEmpty = false) const; 475 476 void Profile(llvm::FoldingSetNodeID &ID) const { 477 ID.AddInteger(Mask); 478 } 479 480 private: 481 482 // bits: |0 1 2|3 .. 4|5 .. 7|8 ... 31| 483 // |C R V|GCAttr|Lifetime|AddressSpace| 484 uint32_t Mask; 485 486 static const uint32_t GCAttrMask = 0x18; 487 static const uint32_t GCAttrShift = 3; 488 static const uint32_t LifetimeMask = 0xE0; 489 static const uint32_t LifetimeShift = 5; 490 static const uint32_t AddressSpaceMask = ~(CVRMask|GCAttrMask|LifetimeMask); 491 static const uint32_t AddressSpaceShift = 8; 492 }; 493 494 /// A std::pair-like structure for storing a qualified type split 495 /// into its local qualifiers and its locally-unqualified type. 496 struct SplitQualType { 497 /// The locally-unqualified type. 498 const Type *Ty; 499 500 /// The local qualifiers. 501 Qualifiers Quals; 502 503 SplitQualType() : Ty(0), Quals() {} 504 SplitQualType(const Type *ty, Qualifiers qs) : Ty(ty), Quals(qs) {} 505 506 SplitQualType getSingleStepDesugaredType() const; // end of this file 507 508 // Make llvm::tie work. 509 operator std::pair<const Type *,Qualifiers>() const { 510 return std::pair<const Type *,Qualifiers>(Ty, Quals); 511 } 512 513 friend bool operator==(SplitQualType a, SplitQualType b) { 514 return a.Ty == b.Ty && a.Quals == b.Quals; 515 } 516 friend bool operator!=(SplitQualType a, SplitQualType b) { 517 return a.Ty != b.Ty || a.Quals != b.Quals; 518 } 519 }; 520 521 /// QualType - For efficiency, we don't store CV-qualified types as nodes on 522 /// their own: instead each reference to a type stores the qualifiers. This 523 /// greatly reduces the number of nodes we need to allocate for types (for 524 /// example we only need one for 'int', 'const int', 'volatile int', 525 /// 'const volatile int', etc). 526 /// 527 /// As an added efficiency bonus, instead of making this a pair, we 528 /// just store the two bits we care about in the low bits of the 529 /// pointer. To handle the packing/unpacking, we make QualType be a 530 /// simple wrapper class that acts like a smart pointer. A third bit 531 /// indicates whether there are extended qualifiers present, in which 532 /// case the pointer points to a special structure. 533 class QualType { 534 // Thankfully, these are efficiently composable. 535 llvm::PointerIntPair<llvm::PointerUnion<const Type*,const ExtQuals*>, 536 Qualifiers::FastWidth> Value; 537 538 const ExtQuals *getExtQualsUnsafe() const { 539 return Value.getPointer().get<const ExtQuals*>(); 540 } 541 542 const Type *getTypePtrUnsafe() const { 543 return Value.getPointer().get<const Type*>(); 544 } 545 546 const ExtQualsTypeCommonBase *getCommonPtr() const { 547 assert(!isNull() && "Cannot retrieve a NULL type pointer"); 548 uintptr_t CommonPtrVal 549 = reinterpret_cast<uintptr_t>(Value.getOpaqueValue()); 550 CommonPtrVal &= ~(uintptr_t)((1 << TypeAlignmentInBits) - 1); 551 return reinterpret_cast<ExtQualsTypeCommonBase*>(CommonPtrVal); 552 } 553 554 friend class QualifierCollector; 555 public: 556 QualType() {} 557 558 QualType(const Type *Ptr, unsigned Quals) 559 : Value(Ptr, Quals) {} 560 QualType(const ExtQuals *Ptr, unsigned Quals) 561 : Value(Ptr, Quals) {} 562 563 unsigned getLocalFastQualifiers() const { return Value.getInt(); } 564 void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); } 565 566 /// Retrieves a pointer to the underlying (unqualified) type. 567 /// 568 /// This function requires that the type not be NULL. If the type might be 569 /// NULL, use the (slightly less efficient) \c getTypePtrOrNull(). 570 const Type *getTypePtr() const; 571 572 const Type *getTypePtrOrNull() const; 573 574 /// Retrieves a pointer to the name of the base type. 575 const IdentifierInfo *getBaseTypeIdentifier() const; 576 577 /// Divides a QualType into its unqualified type and a set of local 578 /// qualifiers. 579 SplitQualType split() const; 580 581 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 582 static QualType getFromOpaquePtr(const void *Ptr) { 583 QualType T; 584 T.Value.setFromOpaqueValue(const_cast<void*>(Ptr)); 585 return T; 586 } 587 588 const Type &operator*() const { 589 return *getTypePtr(); 590 } 591 592 const Type *operator->() const { 593 return getTypePtr(); 594 } 595 596 bool isCanonical() const; 597 bool isCanonicalAsParam() const; 598 599 /// isNull - Return true if this QualType doesn't point to a type yet. 600 bool isNull() const { 601 return Value.getPointer().isNull(); 602 } 603 604 /// \brief Determine whether this particular QualType instance has the 605 /// "const" qualifier set, without looking through typedefs that may have 606 /// added "const" at a different level. 607 bool isLocalConstQualified() const { 608 return (getLocalFastQualifiers() & Qualifiers::Const); 609 } 610 611 /// \brief Determine whether this type is const-qualified. 612 bool isConstQualified() const; 613 614 /// \brief Determine whether this particular QualType instance has the 615 /// "restrict" qualifier set, without looking through typedefs that may have 616 /// added "restrict" at a different level. 617 bool isLocalRestrictQualified() const { 618 return (getLocalFastQualifiers() & Qualifiers::Restrict); 619 } 620 621 /// \brief Determine whether this type is restrict-qualified. 622 bool isRestrictQualified() const; 623 624 /// \brief Determine whether this particular QualType instance has the 625 /// "volatile" qualifier set, without looking through typedefs that may have 626 /// added "volatile" at a different level. 627 bool isLocalVolatileQualified() const { 628 return (getLocalFastQualifiers() & Qualifiers::Volatile); 629 } 630 631 /// \brief Determine whether this type is volatile-qualified. 632 bool isVolatileQualified() const; 633 634 /// \brief Determine whether this particular QualType instance has any 635 /// qualifiers, without looking through any typedefs that might add 636 /// qualifiers at a different level. 637 bool hasLocalQualifiers() const { 638 return getLocalFastQualifiers() || hasLocalNonFastQualifiers(); 639 } 640 641 /// \brief Determine whether this type has any qualifiers. 642 bool hasQualifiers() const; 643 644 /// \brief Determine whether this particular QualType instance has any 645 /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType 646 /// instance. 647 bool hasLocalNonFastQualifiers() const { 648 return Value.getPointer().is<const ExtQuals*>(); 649 } 650 651 /// \brief Retrieve the set of qualifiers local to this particular QualType 652 /// instance, not including any qualifiers acquired through typedefs or 653 /// other sugar. 654 Qualifiers getLocalQualifiers() const; 655 656 /// \brief Retrieve the set of qualifiers applied to this type. 657 Qualifiers getQualifiers() const; 658 659 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 660 /// local to this particular QualType instance, not including any qualifiers 661 /// acquired through typedefs or other sugar. 662 unsigned getLocalCVRQualifiers() const { 663 return getLocalFastQualifiers(); 664 } 665 666 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 667 /// applied to this type. 668 unsigned getCVRQualifiers() const; 669 670 bool isConstant(ASTContext& Ctx) const { 671 return QualType::isConstant(*this, Ctx); 672 } 673 674 /// \brief Determine whether this is a Plain Old Data (POD) type (C++ 3.9p10). 675 bool isPODType(ASTContext &Context) const; 676 677 /// isCXX98PODType() - Return true if this is a POD type according to the 678 /// rules of the C++98 standard, regardless of the current compilation's 679 /// language. 680 bool isCXX98PODType(ASTContext &Context) const; 681 682 /// isCXX11PODType() - Return true if this is a POD type according to the 683 /// more relaxed rules of the C++11 standard, regardless of the current 684 /// compilation's language. 685 /// (C++0x [basic.types]p9) 686 bool isCXX11PODType(ASTContext &Context) const; 687 688 /// isTrivialType - Return true if this is a trivial type 689 /// (C++0x [basic.types]p9) 690 bool isTrivialType(ASTContext &Context) const; 691 692 /// isTriviallyCopyableType - Return true if this is a trivially 693 /// copyable type (C++0x [basic.types]p9) 694 bool isTriviallyCopyableType(ASTContext &Context) const; 695 696 // Don't promise in the API that anything besides 'const' can be 697 // easily added. 698 699 /// addConst - add the specified type qualifier to this QualType. 700 void addConst() { 701 addFastQualifiers(Qualifiers::Const); 702 } 703 QualType withConst() const { 704 return withFastQualifiers(Qualifiers::Const); 705 } 706 707 /// addVolatile - add the specified type qualifier to this QualType. 708 void addVolatile() { 709 addFastQualifiers(Qualifiers::Volatile); 710 } 711 QualType withVolatile() const { 712 return withFastQualifiers(Qualifiers::Volatile); 713 } 714 715 /// Add the restrict qualifier to this QualType. 716 void addRestrict() { 717 addFastQualifiers(Qualifiers::Restrict); 718 } 719 QualType withRestrict() const { 720 return withFastQualifiers(Qualifiers::Restrict); 721 } 722 723 QualType withCVRQualifiers(unsigned CVR) const { 724 return withFastQualifiers(CVR); 725 } 726 727 void addFastQualifiers(unsigned TQs) { 728 assert(!(TQs & ~Qualifiers::FastMask) 729 && "non-fast qualifier bits set in mask!"); 730 Value.setInt(Value.getInt() | TQs); 731 } 732 733 void removeLocalConst(); 734 void removeLocalVolatile(); 735 void removeLocalRestrict(); 736 void removeLocalCVRQualifiers(unsigned Mask); 737 738 void removeLocalFastQualifiers() { Value.setInt(0); } 739 void removeLocalFastQualifiers(unsigned Mask) { 740 assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers"); 741 Value.setInt(Value.getInt() & ~Mask); 742 } 743 744 // Creates a type with the given qualifiers in addition to any 745 // qualifiers already on this type. 746 QualType withFastQualifiers(unsigned TQs) const { 747 QualType T = *this; 748 T.addFastQualifiers(TQs); 749 return T; 750 } 751 752 // Creates a type with exactly the given fast qualifiers, removing 753 // any existing fast qualifiers. 754 QualType withExactLocalFastQualifiers(unsigned TQs) const { 755 return withoutLocalFastQualifiers().withFastQualifiers(TQs); 756 } 757 758 // Removes fast qualifiers, but leaves any extended qualifiers in place. 759 QualType withoutLocalFastQualifiers() const { 760 QualType T = *this; 761 T.removeLocalFastQualifiers(); 762 return T; 763 } 764 765 QualType getCanonicalType() const; 766 767 /// \brief Return this type with all of the instance-specific qualifiers 768 /// removed, but without removing any qualifiers that may have been applied 769 /// through typedefs. 770 QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); } 771 772 /// \brief Retrieve the unqualified variant of the given type, 773 /// removing as little sugar as possible. 774 /// 775 /// This routine looks through various kinds of sugar to find the 776 /// least-desugared type that is unqualified. For example, given: 777 /// 778 /// \code 779 /// typedef int Integer; 780 /// typedef const Integer CInteger; 781 /// typedef CInteger DifferenceType; 782 /// \endcode 783 /// 784 /// Executing \c getUnqualifiedType() on the type \c DifferenceType will 785 /// desugar until we hit the type \c Integer, which has no qualifiers on it. 786 /// 787 /// The resulting type might still be qualified if it's sugar for an array 788 /// type. To strip qualifiers even from within a sugared array type, use 789 /// ASTContext::getUnqualifiedArrayType. 790 inline QualType getUnqualifiedType() const; 791 792 /// getSplitUnqualifiedType - Retrieve the unqualified variant of the 793 /// given type, removing as little sugar as possible. 794 /// 795 /// Like getUnqualifiedType(), but also returns the set of 796 /// qualifiers that were built up. 797 /// 798 /// The resulting type might still be qualified if it's sugar for an array 799 /// type. To strip qualifiers even from within a sugared array type, use 800 /// ASTContext::getUnqualifiedArrayType. 801 inline SplitQualType getSplitUnqualifiedType() const; 802 803 /// \brief Determine whether this type is more qualified than the other 804 /// given type, requiring exact equality for non-CVR qualifiers. 805 bool isMoreQualifiedThan(QualType Other) const; 806 807 /// \brief Determine whether this type is at least as qualified as the other 808 /// given type, requiring exact equality for non-CVR qualifiers. 809 bool isAtLeastAsQualifiedAs(QualType Other) const; 810 811 QualType getNonReferenceType() const; 812 813 /// \brief Determine the type of a (typically non-lvalue) expression with the 814 /// specified result type. 815 /// 816 /// This routine should be used for expressions for which the return type is 817 /// explicitly specified (e.g., in a cast or call) and isn't necessarily 818 /// an lvalue. It removes a top-level reference (since there are no 819 /// expressions of reference type) and deletes top-level cvr-qualifiers 820 /// from non-class types (in C++) or all types (in C). 821 QualType getNonLValueExprType(ASTContext &Context) const; 822 823 /// getDesugaredType - Return the specified type with any "sugar" removed from 824 /// the type. This takes off typedefs, typeof's etc. If the outer level of 825 /// the type is already concrete, it returns it unmodified. This is similar 826 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 827 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 828 /// concrete. 829 /// 830 /// Qualifiers are left in place. 831 QualType getDesugaredType(const ASTContext &Context) const { 832 return getDesugaredType(*this, Context); 833 } 834 835 SplitQualType getSplitDesugaredType() const { 836 return getSplitDesugaredType(*this); 837 } 838 839 /// \brief Return the specified type with one level of "sugar" removed from 840 /// the type. 841 /// 842 /// This routine takes off the first typedef, typeof, etc. If the outer level 843 /// of the type is already concrete, it returns it unmodified. 844 QualType getSingleStepDesugaredType(const ASTContext &Context) const { 845 return getSingleStepDesugaredTypeImpl(*this, Context); 846 } 847 848 /// IgnoreParens - Returns the specified type after dropping any 849 /// outer-level parentheses. 850 QualType IgnoreParens() const { 851 if (isa<ParenType>(*this)) 852 return QualType::IgnoreParens(*this); 853 return *this; 854 } 855 856 /// operator==/!= - Indicate whether the specified types and qualifiers are 857 /// identical. 858 friend bool operator==(const QualType &LHS, const QualType &RHS) { 859 return LHS.Value == RHS.Value; 860 } 861 friend bool operator!=(const QualType &LHS, const QualType &RHS) { 862 return LHS.Value != RHS.Value; 863 } 864 std::string getAsString() const { 865 return getAsString(split()); 866 } 867 static std::string getAsString(SplitQualType split) { 868 return getAsString(split.Ty, split.Quals); 869 } 870 static std::string getAsString(const Type *ty, Qualifiers qs); 871 872 std::string getAsString(const PrintingPolicy &Policy) const; 873 874 void print(raw_ostream &OS, const PrintingPolicy &Policy, 875 const Twine &PlaceHolder = Twine()) const { 876 print(split(), OS, Policy, PlaceHolder); 877 } 878 static void print(SplitQualType split, raw_ostream &OS, 879 const PrintingPolicy &policy, const Twine &PlaceHolder) { 880 return print(split.Ty, split.Quals, OS, policy, PlaceHolder); 881 } 882 static void print(const Type *ty, Qualifiers qs, 883 raw_ostream &OS, const PrintingPolicy &policy, 884 const Twine &PlaceHolder); 885 886 void getAsStringInternal(std::string &Str, 887 const PrintingPolicy &Policy) const { 888 return getAsStringInternal(split(), Str, Policy); 889 } 890 static void getAsStringInternal(SplitQualType split, std::string &out, 891 const PrintingPolicy &policy) { 892 return getAsStringInternal(split.Ty, split.Quals, out, policy); 893 } 894 static void getAsStringInternal(const Type *ty, Qualifiers qs, 895 std::string &out, 896 const PrintingPolicy &policy); 897 898 class StreamedQualTypeHelper { 899 const QualType &T; 900 const PrintingPolicy &Policy; 901 const Twine &PlaceHolder; 902 public: 903 StreamedQualTypeHelper(const QualType &T, const PrintingPolicy &Policy, 904 const Twine &PlaceHolder) 905 : T(T), Policy(Policy), PlaceHolder(PlaceHolder) { } 906 907 friend raw_ostream &operator<<(raw_ostream &OS, 908 const StreamedQualTypeHelper &SQT) { 909 SQT.T.print(OS, SQT.Policy, SQT.PlaceHolder); 910 return OS; 911 } 912 }; 913 914 StreamedQualTypeHelper stream(const PrintingPolicy &Policy, 915 const Twine &PlaceHolder = Twine()) const { 916 return StreamedQualTypeHelper(*this, Policy, PlaceHolder); 917 } 918 919 void dump(const char *s) const; 920 void dump() const; 921 922 void Profile(llvm::FoldingSetNodeID &ID) const { 923 ID.AddPointer(getAsOpaquePtr()); 924 } 925 926 /// getAddressSpace - Return the address space of this type. 927 inline unsigned getAddressSpace() const; 928 929 /// getObjCGCAttr - Returns gc attribute of this type. 930 inline Qualifiers::GC getObjCGCAttr() const; 931 932 /// isObjCGCWeak true when Type is objc's weak. 933 bool isObjCGCWeak() const { 934 return getObjCGCAttr() == Qualifiers::Weak; 935 } 936 937 /// isObjCGCStrong true when Type is objc's strong. 938 bool isObjCGCStrong() const { 939 return getObjCGCAttr() == Qualifiers::Strong; 940 } 941 942 /// getObjCLifetime - Returns lifetime attribute of this type. 943 Qualifiers::ObjCLifetime getObjCLifetime() const { 944 return getQualifiers().getObjCLifetime(); 945 } 946 947 bool hasNonTrivialObjCLifetime() const { 948 return getQualifiers().hasNonTrivialObjCLifetime(); 949 } 950 951 bool hasStrongOrWeakObjCLifetime() const { 952 return getQualifiers().hasStrongOrWeakObjCLifetime(); 953 } 954 955 enum DestructionKind { 956 DK_none, 957 DK_cxx_destructor, 958 DK_objc_strong_lifetime, 959 DK_objc_weak_lifetime 960 }; 961 962 /// isDestructedType - nonzero if objects of this type require 963 /// non-trivial work to clean up after. Non-zero because it's 964 /// conceivable that qualifiers (objc_gc(weak)?) could make 965 /// something require destruction. 966 DestructionKind isDestructedType() const { 967 return isDestructedTypeImpl(*this); 968 } 969 970 /// \brief Determine whether expressions of the given type are forbidden 971 /// from being lvalues in C. 972 /// 973 /// The expression types that are forbidden to be lvalues are: 974 /// - 'void', but not qualified void 975 /// - function types 976 /// 977 /// The exact rule here is C99 6.3.2.1: 978 /// An lvalue is an expression with an object type or an incomplete 979 /// type other than void. 980 bool isCForbiddenLValueType() const; 981 982 private: 983 // These methods are implemented in a separate translation unit; 984 // "static"-ize them to avoid creating temporary QualTypes in the 985 // caller. 986 static bool isConstant(QualType T, ASTContext& Ctx); 987 static QualType getDesugaredType(QualType T, const ASTContext &Context); 988 static SplitQualType getSplitDesugaredType(QualType T); 989 static SplitQualType getSplitUnqualifiedTypeImpl(QualType type); 990 static QualType getSingleStepDesugaredTypeImpl(QualType type, 991 const ASTContext &C); 992 static QualType IgnoreParens(QualType T); 993 static DestructionKind isDestructedTypeImpl(QualType type); 994 }; 995 996 } // end clang. 997 998 namespace llvm { 999 /// Implement simplify_type for QualType, so that we can dyn_cast from QualType 1000 /// to a specific Type class. 1001 template<> struct simplify_type<const ::clang::QualType> { 1002 typedef const ::clang::Type *SimpleType; 1003 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 1004 return Val.getTypePtr(); 1005 } 1006 }; 1007 template<> struct simplify_type< ::clang::QualType> 1008 : public simplify_type<const ::clang::QualType> {}; 1009 1010 // Teach SmallPtrSet that QualType is "basically a pointer". 1011 template<> 1012 class PointerLikeTypeTraits<clang::QualType> { 1013 public: 1014 static inline void *getAsVoidPointer(clang::QualType P) { 1015 return P.getAsOpaquePtr(); 1016 } 1017 static inline clang::QualType getFromVoidPointer(void *P) { 1018 return clang::QualType::getFromOpaquePtr(P); 1019 } 1020 // Various qualifiers go in low bits. 1021 enum { NumLowBitsAvailable = 0 }; 1022 }; 1023 1024 } // end namespace llvm 1025 1026 namespace clang { 1027 1028 /// \brief Base class that is common to both the \c ExtQuals and \c Type 1029 /// classes, which allows \c QualType to access the common fields between the 1030 /// two. 1031 /// 1032 class ExtQualsTypeCommonBase { 1033 ExtQualsTypeCommonBase(const Type *baseType, QualType canon) 1034 : BaseType(baseType), CanonicalType(canon) {} 1035 1036 /// \brief The "base" type of an extended qualifiers type (\c ExtQuals) or 1037 /// a self-referential pointer (for \c Type). 1038 /// 1039 /// This pointer allows an efficient mapping from a QualType to its 1040 /// underlying type pointer. 1041 const Type *const BaseType; 1042 1043 /// \brief The canonical type of this type. A QualType. 1044 QualType CanonicalType; 1045 1046 friend class QualType; 1047 friend class Type; 1048 friend class ExtQuals; 1049 }; 1050 1051 /// ExtQuals - We can encode up to four bits in the low bits of a 1052 /// type pointer, but there are many more type qualifiers that we want 1053 /// to be able to apply to an arbitrary type. Therefore we have this 1054 /// struct, intended to be heap-allocated and used by QualType to 1055 /// store qualifiers. 1056 /// 1057 /// The current design tags the 'const', 'restrict', and 'volatile' qualifiers 1058 /// in three low bits on the QualType pointer; a fourth bit records whether 1059 /// the pointer is an ExtQuals node. The extended qualifiers (address spaces, 1060 /// Objective-C GC attributes) are much more rare. 1061 class ExtQuals : public ExtQualsTypeCommonBase, public llvm::FoldingSetNode { 1062 // NOTE: changing the fast qualifiers should be straightforward as 1063 // long as you don't make 'const' non-fast. 1064 // 1. Qualifiers: 1065 // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). 1066 // Fast qualifiers must occupy the low-order bits. 1067 // b) Update Qualifiers::FastWidth and FastMask. 1068 // 2. QualType: 1069 // a) Update is{Volatile,Restrict}Qualified(), defined inline. 1070 // b) Update remove{Volatile,Restrict}, defined near the end of 1071 // this header. 1072 // 3. ASTContext: 1073 // a) Update get{Volatile,Restrict}Type. 1074 1075 /// Quals - the immutable set of qualifiers applied by this 1076 /// node; always contains extended qualifiers. 1077 Qualifiers Quals; 1078 1079 ExtQuals *this_() { return this; } 1080 1081 public: 1082 ExtQuals(const Type *baseType, QualType canon, Qualifiers quals) 1083 : ExtQualsTypeCommonBase(baseType, 1084 canon.isNull() ? QualType(this_(), 0) : canon), 1085 Quals(quals) 1086 { 1087 assert(Quals.hasNonFastQualifiers() 1088 && "ExtQuals created with no fast qualifiers"); 1089 assert(!Quals.hasFastQualifiers() 1090 && "ExtQuals created with fast qualifiers"); 1091 } 1092 1093 Qualifiers getQualifiers() const { return Quals; } 1094 1095 bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } 1096 Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } 1097 1098 bool hasObjCLifetime() const { return Quals.hasObjCLifetime(); } 1099 Qualifiers::ObjCLifetime getObjCLifetime() const { 1100 return Quals.getObjCLifetime(); 1101 } 1102 1103 bool hasAddressSpace() const { return Quals.hasAddressSpace(); } 1104 unsigned getAddressSpace() const { return Quals.getAddressSpace(); } 1105 1106 const Type *getBaseType() const { return BaseType; } 1107 1108 public: 1109 void Profile(llvm::FoldingSetNodeID &ID) const { 1110 Profile(ID, getBaseType(), Quals); 1111 } 1112 static void Profile(llvm::FoldingSetNodeID &ID, 1113 const Type *BaseType, 1114 Qualifiers Quals) { 1115 assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!"); 1116 ID.AddPointer(BaseType); 1117 Quals.Profile(ID); 1118 } 1119 }; 1120 1121 /// \brief The kind of C++0x ref-qualifier associated with a function type, 1122 /// which determines whether a member function's "this" object can be an 1123 /// lvalue, rvalue, or neither. 1124 enum RefQualifierKind { 1125 /// \brief No ref-qualifier was provided. 1126 RQ_None = 0, 1127 /// \brief An lvalue ref-qualifier was provided (\c &). 1128 RQ_LValue, 1129 /// \brief An rvalue ref-qualifier was provided (\c &&). 1130 RQ_RValue 1131 }; 1132 1133 /// Type - This is the base class of the type hierarchy. A central concept 1134 /// with types is that each type always has a canonical type. A canonical type 1135 /// is the type with any typedef names stripped out of it or the types it 1136 /// references. For example, consider: 1137 /// 1138 /// typedef int foo; 1139 /// typedef foo* bar; 1140 /// 'int *' 'foo *' 'bar' 1141 /// 1142 /// There will be a Type object created for 'int'. Since int is canonical, its 1143 /// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 1144 /// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 1145 /// there is a PointerType that represents 'int*', which, like 'int', is 1146 /// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 1147 /// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 1148 /// is also 'int*'. 1149 /// 1150 /// Non-canonical types are useful for emitting diagnostics, without losing 1151 /// information about typedefs being used. Canonical types are useful for type 1152 /// comparisons (they allow by-pointer equality tests) and useful for reasoning 1153 /// about whether something has a particular form (e.g. is a function type), 1154 /// because they implicitly, recursively, strip all typedefs out of a type. 1155 /// 1156 /// Types, once created, are immutable. 1157 /// 1158 class Type : public ExtQualsTypeCommonBase { 1159 public: 1160 enum TypeClass { 1161 #define TYPE(Class, Base) Class, 1162 #define LAST_TYPE(Class) TypeLast = Class, 1163 #define ABSTRACT_TYPE(Class, Base) 1164 #include "clang/AST/TypeNodes.def" 1165 TagFirst = Record, TagLast = Enum 1166 }; 1167 1168 private: 1169 Type(const Type &) LLVM_DELETED_FUNCTION; 1170 void operator=(const Type &) LLVM_DELETED_FUNCTION; 1171 1172 /// Bitfields required by the Type class. 1173 class TypeBitfields { 1174 friend class Type; 1175 template <class T> friend class TypePropertyCache; 1176 1177 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 1178 unsigned TC : 8; 1179 1180 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 1181 unsigned Dependent : 1; 1182 1183 /// \brief Whether this type somehow involves a template parameter, even 1184 /// if the resolution of the type does not depend on a template parameter. 1185 unsigned InstantiationDependent : 1; 1186 1187 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 1188 unsigned VariablyModified : 1; 1189 1190 /// \brief Whether this type contains an unexpanded parameter pack 1191 /// (for C++0x variadic templates). 1192 unsigned ContainsUnexpandedParameterPack : 1; 1193 1194 /// \brief True if the cache (i.e. the bitfields here starting with 1195 /// 'Cache') is valid. 1196 mutable unsigned CacheValid : 1; 1197 1198 /// \brief Linkage of this type. 1199 mutable unsigned CachedLinkage : 2; 1200 1201 /// \brief Whether this type involves and local or unnamed types. 1202 mutable unsigned CachedLocalOrUnnamed : 1; 1203 1204 /// \brief FromAST - Whether this type comes from an AST file. 1205 mutable unsigned FromAST : 1; 1206 1207 bool isCacheValid() const { 1208 return CacheValid; 1209 } 1210 Linkage getLinkage() const { 1211 assert(isCacheValid() && "getting linkage from invalid cache"); 1212 return static_cast<Linkage>(CachedLinkage); 1213 } 1214 bool hasLocalOrUnnamedType() const { 1215 assert(isCacheValid() && "getting linkage from invalid cache"); 1216 return CachedLocalOrUnnamed; 1217 } 1218 }; 1219 enum { NumTypeBits = 19 }; 1220 1221 protected: 1222 // These classes allow subclasses to somewhat cleanly pack bitfields 1223 // into Type. 1224 1225 class ArrayTypeBitfields { 1226 friend class ArrayType; 1227 1228 unsigned : NumTypeBits; 1229 1230 /// IndexTypeQuals - CVR qualifiers from declarations like 1231 /// 'int X[static restrict 4]'. For function parameters only. 1232 unsigned IndexTypeQuals : 3; 1233 1234 /// SizeModifier - storage class qualifiers from declarations like 1235 /// 'int X[static restrict 4]'. For function parameters only. 1236 /// Actually an ArrayType::ArraySizeModifier. 1237 unsigned SizeModifier : 3; 1238 }; 1239 1240 class BuiltinTypeBitfields { 1241 friend class BuiltinType; 1242 1243 unsigned : NumTypeBits; 1244 1245 /// The kind (BuiltinType::Kind) of builtin type this is. 1246 unsigned Kind : 8; 1247 }; 1248 1249 class FunctionTypeBitfields { 1250 friend class FunctionType; 1251 1252 unsigned : NumTypeBits; 1253 1254 /// Extra information which affects how the function is called, like 1255 /// regparm and the calling convention. 1256 unsigned ExtInfo : 9; 1257 1258 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1259 /// other bitfields. 1260 /// The qualifiers are part of FunctionProtoType because... 1261 /// 1262 /// C++ 8.3.5p4: The return type, the parameter type list and the 1263 /// cv-qualifier-seq, [...], are part of the function type. 1264 unsigned TypeQuals : 3; 1265 }; 1266 1267 class ObjCObjectTypeBitfields { 1268 friend class ObjCObjectType; 1269 1270 unsigned : NumTypeBits; 1271 1272 /// NumProtocols - The number of protocols stored directly on this 1273 /// object type. 1274 unsigned NumProtocols : 32 - NumTypeBits; 1275 }; 1276 1277 class ReferenceTypeBitfields { 1278 friend class ReferenceType; 1279 1280 unsigned : NumTypeBits; 1281 1282 /// True if the type was originally spelled with an lvalue sigil. 1283 /// This is never true of rvalue references but can also be false 1284 /// on lvalue references because of C++0x [dcl.typedef]p9, 1285 /// as follows: 1286 /// 1287 /// typedef int &ref; // lvalue, spelled lvalue 1288 /// typedef int &&rvref; // rvalue 1289 /// ref &a; // lvalue, inner ref, spelled lvalue 1290 /// ref &&a; // lvalue, inner ref 1291 /// rvref &a; // lvalue, inner ref, spelled lvalue 1292 /// rvref &&a; // rvalue, inner ref 1293 unsigned SpelledAsLValue : 1; 1294 1295 /// True if the inner type is a reference type. This only happens 1296 /// in non-canonical forms. 1297 unsigned InnerRef : 1; 1298 }; 1299 1300 class TypeWithKeywordBitfields { 1301 friend class TypeWithKeyword; 1302 1303 unsigned : NumTypeBits; 1304 1305 /// An ElaboratedTypeKeyword. 8 bits for efficient access. 1306 unsigned Keyword : 8; 1307 }; 1308 1309 class VectorTypeBitfields { 1310 friend class VectorType; 1311 1312 unsigned : NumTypeBits; 1313 1314 /// VecKind - The kind of vector, either a generic vector type or some 1315 /// target-specific vector type such as for AltiVec or Neon. 1316 unsigned VecKind : 3; 1317 1318 /// NumElements - The number of elements in the vector. 1319 unsigned NumElements : 29 - NumTypeBits; 1320 }; 1321 1322 class AttributedTypeBitfields { 1323 friend class AttributedType; 1324 1325 unsigned : NumTypeBits; 1326 1327 /// AttrKind - an AttributedType::Kind 1328 unsigned AttrKind : 32 - NumTypeBits; 1329 }; 1330 1331 union { 1332 TypeBitfields TypeBits; 1333 ArrayTypeBitfields ArrayTypeBits; 1334 AttributedTypeBitfields AttributedTypeBits; 1335 BuiltinTypeBitfields BuiltinTypeBits; 1336 FunctionTypeBitfields FunctionTypeBits; 1337 ObjCObjectTypeBitfields ObjCObjectTypeBits; 1338 ReferenceTypeBitfields ReferenceTypeBits; 1339 TypeWithKeywordBitfields TypeWithKeywordBits; 1340 VectorTypeBitfields VectorTypeBits; 1341 }; 1342 1343 private: 1344 /// \brief Set whether this type comes from an AST file. 1345 void setFromAST(bool V = true) const { 1346 TypeBits.FromAST = V; 1347 } 1348 1349 template <class T> friend class TypePropertyCache; 1350 1351 protected: 1352 // silence VC++ warning C4355: 'this' : used in base member initializer list 1353 Type *this_() { return this; } 1354 Type(TypeClass tc, QualType canon, bool Dependent, 1355 bool InstantiationDependent, bool VariablyModified, 1356 bool ContainsUnexpandedParameterPack) 1357 : ExtQualsTypeCommonBase(this, 1358 canon.isNull() ? QualType(this_(), 0) : canon) { 1359 TypeBits.TC = tc; 1360 TypeBits.Dependent = Dependent; 1361 TypeBits.InstantiationDependent = Dependent || InstantiationDependent; 1362 TypeBits.VariablyModified = VariablyModified; 1363 TypeBits.ContainsUnexpandedParameterPack = ContainsUnexpandedParameterPack; 1364 TypeBits.CacheValid = false; 1365 TypeBits.CachedLocalOrUnnamed = false; 1366 TypeBits.CachedLinkage = NoLinkage; 1367 TypeBits.FromAST = false; 1368 } 1369 friend class ASTContext; 1370 1371 void setDependent(bool D = true) { 1372 TypeBits.Dependent = D; 1373 if (D) 1374 TypeBits.InstantiationDependent = true; 1375 } 1376 void setInstantiationDependent(bool D = true) { 1377 TypeBits.InstantiationDependent = D; } 1378 void setVariablyModified(bool VM = true) { TypeBits.VariablyModified = VM; 1379 } 1380 void setContainsUnexpandedParameterPack(bool PP = true) { 1381 TypeBits.ContainsUnexpandedParameterPack = PP; 1382 } 1383 1384 public: 1385 TypeClass getTypeClass() const { return static_cast<TypeClass>(TypeBits.TC); } 1386 1387 /// \brief Whether this type comes from an AST file. 1388 bool isFromAST() const { return TypeBits.FromAST; } 1389 1390 /// \brief Whether this type is or contains an unexpanded parameter 1391 /// pack, used to support C++0x variadic templates. 1392 /// 1393 /// A type that contains a parameter pack shall be expanded by the 1394 /// ellipsis operator at some point. For example, the typedef in the 1395 /// following example contains an unexpanded parameter pack 'T': 1396 /// 1397 /// \code 1398 /// template<typename ...T> 1399 /// struct X { 1400 /// typedef T* pointer_types; // ill-formed; T is a parameter pack. 1401 /// }; 1402 /// \endcode 1403 /// 1404 /// Note that this routine does not specify which 1405 bool containsUnexpandedParameterPack() const { 1406 return TypeBits.ContainsUnexpandedParameterPack; 1407 } 1408 1409 /// Determines if this type would be canonical if it had no further 1410 /// qualification. 1411 bool isCanonicalUnqualified() const { 1412 return CanonicalType == QualType(this, 0); 1413 } 1414 1415 /// Pull a single level of sugar off of this locally-unqualified type. 1416 /// Users should generally prefer SplitQualType::getSingleStepDesugaredType() 1417 /// or QualType::getSingleStepDesugaredType(const ASTContext&). 1418 QualType getLocallyUnqualifiedSingleStepDesugaredType() const; 1419 1420 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 1421 /// object types, function types, and incomplete types. 1422 1423 /// isIncompleteType - Return true if this is an incomplete type. 1424 /// A type that can describe objects, but which lacks information needed to 1425 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 1426 /// routine will need to determine if the size is actually required. 1427 /// 1428 /// \brief Def If non-NULL, and the type refers to some kind of declaration 1429 /// that can be completed (such as a C struct, C++ class, or Objective-C 1430 /// class), will be set to the declaration. 1431 bool isIncompleteType(NamedDecl **Def = 0) const; 1432 1433 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 1434 /// type, in other words, not a function type. 1435 bool isIncompleteOrObjectType() const { 1436 return !isFunctionType(); 1437 } 1438 1439 /// \brief Determine whether this type is an object type. 1440 bool isObjectType() const { 1441 // C++ [basic.types]p8: 1442 // An object type is a (possibly cv-qualified) type that is not a 1443 // function type, not a reference type, and not a void type. 1444 return !isReferenceType() && !isFunctionType() && !isVoidType(); 1445 } 1446 1447 /// isLiteralType - Return true if this is a literal type 1448 /// (C++0x [basic.types]p10) 1449 bool isLiteralType() const; 1450 1451 /// \brief Test if this type is a standard-layout type. 1452 /// (C++0x [basic.type]p9) 1453 bool isStandardLayoutType() const; 1454 1455 /// Helper methods to distinguish type categories. All type predicates 1456 /// operate on the canonical type, ignoring typedefs and qualifiers. 1457 1458 /// isBuiltinType - returns true if the type is a builtin type. 1459 bool isBuiltinType() const; 1460 1461 /// isSpecificBuiltinType - Test for a particular builtin type. 1462 bool isSpecificBuiltinType(unsigned K) const; 1463 1464 /// isPlaceholderType - Test for a type which does not represent an 1465 /// actual type-system type but is instead used as a placeholder for 1466 /// various convenient purposes within Clang. All such types are 1467 /// BuiltinTypes. 1468 bool isPlaceholderType() const; 1469 const BuiltinType *getAsPlaceholderType() const; 1470 1471 /// isSpecificPlaceholderType - Test for a specific placeholder type. 1472 bool isSpecificPlaceholderType(unsigned K) const; 1473 1474 /// isNonOverloadPlaceholderType - Test for a placeholder type 1475 /// other than Overload; see BuiltinType::isNonOverloadPlaceholderType. 1476 bool isNonOverloadPlaceholderType() const; 1477 1478 /// isIntegerType() does *not* include complex integers (a GCC extension). 1479 /// isComplexIntegerType() can be used to test for complex integers. 1480 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 1481 bool isEnumeralType() const; 1482 bool isBooleanType() const; 1483 bool isCharType() const; 1484 bool isWideCharType() const; 1485 bool isChar16Type() const; 1486 bool isChar32Type() const; 1487 bool isAnyCharacterType() const; 1488 bool isIntegralType(ASTContext &Ctx) const; 1489 1490 /// \brief Determine whether this type is an integral or enumeration type. 1491 bool isIntegralOrEnumerationType() const; 1492 /// \brief Determine whether this type is an integral or unscoped enumeration 1493 /// type. 1494 bool isIntegralOrUnscopedEnumerationType() const; 1495 1496 /// Floating point categories. 1497 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 1498 /// isComplexType() does *not* include complex integers (a GCC extension). 1499 /// isComplexIntegerType() can be used to test for complex integers. 1500 bool isComplexType() const; // C99 6.2.5p11 (complex) 1501 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 1502 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 1503 bool isHalfType() const; // OpenCL 6.1.1.1, NEON (IEEE 754-2008 half) 1504 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 1505 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 1506 bool isVoidType() const; // C99 6.2.5p19 1507 bool isDerivedType() const; // C99 6.2.5p20 1508 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 1509 bool isAggregateType() const; 1510 bool isFundamentalType() const; 1511 bool isCompoundType() const; 1512 1513 // Type Predicates: Check to see if this type is structurally the specified 1514 // type, ignoring typedefs and qualifiers. 1515 bool isFunctionType() const; 1516 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 1517 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 1518 bool isPointerType() const; 1519 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 1520 bool isBlockPointerType() const; 1521 bool isVoidPointerType() const; 1522 bool isReferenceType() const; 1523 bool isLValueReferenceType() const; 1524 bool isRValueReferenceType() const; 1525 bool isFunctionPointerType() const; 1526 bool isMemberPointerType() const; 1527 bool isMemberFunctionPointerType() const; 1528 bool isMemberDataPointerType() const; 1529 bool isArrayType() const; 1530 bool isConstantArrayType() const; 1531 bool isIncompleteArrayType() const; 1532 bool isVariableArrayType() const; 1533 bool isDependentSizedArrayType() const; 1534 bool isRecordType() const; 1535 bool isClassType() const; 1536 bool isStructureType() const; 1537 bool isInterfaceType() const; 1538 bool isStructureOrClassType() const; 1539 bool isUnionType() const; 1540 bool isComplexIntegerType() const; // GCC _Complex integer type. 1541 bool isVectorType() const; // GCC vector type. 1542 bool isExtVectorType() const; // Extended vector type. 1543 bool isObjCObjectPointerType() const; // pointer to ObjC object 1544 bool isObjCRetainableType() const; // ObjC object or block pointer 1545 bool isObjCLifetimeType() const; // (array of)* retainable type 1546 bool isObjCIndirectLifetimeType() const; // (pointer to)* lifetime type 1547 bool isObjCNSObjectType() const; // __attribute__((NSObject)) 1548 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 1549 // for the common case. 1550 bool isObjCObjectType() const; // NSString or typeof(*(id)0) 1551 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 1552 bool isObjCQualifiedIdType() const; // id<foo> 1553 bool isObjCQualifiedClassType() const; // Class<foo> 1554 bool isObjCObjectOrInterfaceType() const; 1555 bool isObjCIdType() const; // id 1556 bool isObjCClassType() const; // Class 1557 bool isObjCSelType() const; // Class 1558 bool isObjCBuiltinType() const; // 'id' or 'Class' 1559 bool isObjCARCBridgableType() const; 1560 bool isCARCBridgableType() const; 1561 bool isTemplateTypeParmType() const; // C++ template type parameter 1562 bool isNullPtrType() const; // C++0x nullptr_t 1563 bool isAtomicType() const; // C11 _Atomic() 1564 1565 bool isImage1dT() const; // OpenCL image1d_t 1566 bool isImage1dArrayT() const; // OpenCL image1d_array_t 1567 bool isImage1dBufferT() const; // OpenCL image1d_buffer_t 1568 bool isImage2dT() const; // OpenCL image2d_t 1569 bool isImage2dArrayT() const; // OpenCL image2d_array_t 1570 bool isImage3dT() const; // OpenCL image3d_t 1571 1572 bool isImageType() const; // Any OpenCL image type 1573 1574 bool isSamplerT() const; // OpenCL sampler_t 1575 bool isEventT() const; // OpenCL event_t 1576 1577 bool isOpenCLSpecificType() const; // Any OpenCL specific type 1578 1579 /// Determines if this type, which must satisfy 1580 /// isObjCLifetimeType(), is implicitly __unsafe_unretained rather 1581 /// than implicitly __strong. 1582 bool isObjCARCImplicitlyUnretainedType() const; 1583 1584 /// Return the implicit lifetime for this type, which must not be dependent. 1585 Qualifiers::ObjCLifetime getObjCARCImplicitLifetime() const; 1586 1587 enum ScalarTypeKind { 1588 STK_CPointer, 1589 STK_BlockPointer, 1590 STK_ObjCObjectPointer, 1591 STK_MemberPointer, 1592 STK_Bool, 1593 STK_Integral, 1594 STK_Floating, 1595 STK_IntegralComplex, 1596 STK_FloatingComplex 1597 }; 1598 /// getScalarTypeKind - Given that this is a scalar type, classify it. 1599 ScalarTypeKind getScalarTypeKind() const; 1600 1601 /// isDependentType - Whether this type is a dependent type, meaning 1602 /// that its definition somehow depends on a template parameter 1603 /// (C++ [temp.dep.type]). 1604 bool isDependentType() const { return TypeBits.Dependent; } 1605 1606 /// \brief Determine whether this type is an instantiation-dependent type, 1607 /// meaning that the type involves a template parameter (even if the 1608 /// definition does not actually depend on the type substituted for that 1609 /// template parameter). 1610 bool isInstantiationDependentType() const { 1611 return TypeBits.InstantiationDependent; 1612 } 1613 1614 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 1615 bool isVariablyModifiedType() const { return TypeBits.VariablyModified; } 1616 1617 /// \brief Whether this type involves a variable-length array type 1618 /// with a definite size. 1619 bool hasSizedVLAType() const; 1620 1621 /// \brief Whether this type is or contains a local or unnamed type. 1622 bool hasUnnamedOrLocalType() const; 1623 1624 bool isOverloadableType() const; 1625 1626 /// \brief Determine wither this type is a C++ elaborated-type-specifier. 1627 bool isElaboratedTypeSpecifier() const; 1628 1629 bool canDecayToPointerType() const; 1630 1631 /// hasPointerRepresentation - Whether this type is represented 1632 /// natively as a pointer; this includes pointers, references, block 1633 /// pointers, and Objective-C interface, qualified id, and qualified 1634 /// interface types, as well as nullptr_t. 1635 bool hasPointerRepresentation() const; 1636 1637 /// hasObjCPointerRepresentation - Whether this type can represent 1638 /// an objective pointer type for the purpose of GC'ability 1639 bool hasObjCPointerRepresentation() const; 1640 1641 /// \brief Determine whether this type has an integer representation 1642 /// of some sort, e.g., it is an integer type or a vector. 1643 bool hasIntegerRepresentation() const; 1644 1645 /// \brief Determine whether this type has an signed integer representation 1646 /// of some sort, e.g., it is an signed integer type or a vector. 1647 bool hasSignedIntegerRepresentation() const; 1648 1649 /// \brief Determine whether this type has an unsigned integer representation 1650 /// of some sort, e.g., it is an unsigned integer type or a vector. 1651 bool hasUnsignedIntegerRepresentation() const; 1652 1653 /// \brief Determine whether this type has a floating-point representation 1654 /// of some sort, e.g., it is a floating-point type or a vector thereof. 1655 bool hasFloatingRepresentation() const; 1656 1657 // Type Checking Functions: Check to see if this type is structurally the 1658 // specified type, ignoring typedefs and qualifiers, and return a pointer to 1659 // the best type we can. 1660 const RecordType *getAsStructureType() const; 1661 /// NOTE: getAs*ArrayType are methods on ASTContext. 1662 const RecordType *getAsUnionType() const; 1663 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 1664 // The following is a convenience method that returns an ObjCObjectPointerType 1665 // for object declared using an interface. 1666 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 1667 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 1668 const ObjCObjectPointerType *getAsObjCQualifiedClassType() const; 1669 const ObjCObjectType *getAsObjCQualifiedInterfaceType() const; 1670 1671 /// \brief Retrieves the CXXRecordDecl that this type refers to, either 1672 /// because the type is a RecordType or because it is the injected-class-name 1673 /// type of a class template or class template partial specialization. 1674 CXXRecordDecl *getAsCXXRecordDecl() const; 1675 1676 /// If this is a pointer or reference to a RecordType, return the 1677 /// CXXRecordDecl that that type refers to. 1678 /// 1679 /// If this is not a pointer or reference, or the type being pointed to does 1680 /// not refer to a CXXRecordDecl, returns NULL. 1681 const CXXRecordDecl *getPointeeCXXRecordDecl() const; 1682 1683 /// \brief Get the AutoType whose type will be deduced for a variable with 1684 /// an initializer of this type. This looks through declarators like pointer 1685 /// types, but not through decltype or typedefs. 1686 AutoType *getContainedAutoType() const; 1687 1688 /// Member-template getAs<specific type>'. Look through sugar for 1689 /// an instance of \<specific type>. This scheme will eventually 1690 /// replace the specific getAsXXXX methods above. 1691 /// 1692 /// There are some specializations of this member template listed 1693 /// immediately following this class. 1694 template <typename T> const T *getAs() const; 1695 1696 /// A variant of getAs<> for array types which silently discards 1697 /// qualifiers from the outermost type. 1698 const ArrayType *getAsArrayTypeUnsafe() const; 1699 1700 /// Member-template castAs<specific type>. Look through sugar for 1701 /// the underlying instance of \<specific type>. 1702 /// 1703 /// This method has the same relationship to getAs<T> as cast<T> has 1704 /// to dyn_cast<T>; which is to say, the underlying type *must* 1705 /// have the intended type, and this method will never return null. 1706 template <typename T> const T *castAs() const; 1707 1708 /// A variant of castAs<> for array type which silently discards 1709 /// qualifiers from the outermost type. 1710 const ArrayType *castAsArrayTypeUnsafe() const; 1711 1712 /// getBaseElementTypeUnsafe - Get the base element type of this 1713 /// type, potentially discarding type qualifiers. This method 1714 /// should never be used when type qualifiers are meaningful. 1715 const Type *getBaseElementTypeUnsafe() const; 1716 1717 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 1718 /// element type of the array, potentially with type qualifiers missing. 1719 /// This method should never be used when type qualifiers are meaningful. 1720 const Type *getArrayElementTypeNoTypeQual() const; 1721 1722 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 1723 /// pointer, this returns the respective pointee. 1724 QualType getPointeeType() const; 1725 1726 /// getUnqualifiedDesugaredType() - Return the specified type with 1727 /// any "sugar" removed from the type, removing any typedefs, 1728 /// typeofs, etc., as well as any qualifiers. 1729 const Type *getUnqualifiedDesugaredType() const; 1730 1731 /// More type predicates useful for type checking/promotion 1732 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 1733 1734 /// isSignedIntegerType - Return true if this is an integer type that is 1735 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 1736 /// or an enum decl which has a signed representation. 1737 bool isSignedIntegerType() const; 1738 1739 /// isUnsignedIntegerType - Return true if this is an integer type that is 1740 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], 1741 /// or an enum decl which has an unsigned representation. 1742 bool isUnsignedIntegerType() const; 1743 1744 /// Determines whether this is an integer type that is signed or an 1745 /// enumeration types whose underlying type is a signed integer type. 1746 bool isSignedIntegerOrEnumerationType() const; 1747 1748 /// Determines whether this is an integer type that is unsigned or an 1749 /// enumeration types whose underlying type is a unsigned integer type. 1750 bool isUnsignedIntegerOrEnumerationType() const; 1751 1752 /// isConstantSizeType - Return true if this is not a variable sized type, 1753 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 1754 /// incomplete types. 1755 bool isConstantSizeType() const; 1756 1757 /// isSpecifierType - Returns true if this type can be represented by some 1758 /// set of type specifiers. 1759 bool isSpecifierType() const; 1760 1761 /// \brief Determine the linkage of this type. 1762 Linkage getLinkage() const; 1763 1764 /// \brief Determine the visibility of this type. 1765 Visibility getVisibility() const { 1766 return getLinkageAndVisibility().getVisibility(); 1767 } 1768 1769 /// \brief Return true if the visibility was explicitly set is the code. 1770 bool isVisibilityExplicit() const { 1771 return getLinkageAndVisibility().isVisibilityExplicit(); 1772 } 1773 1774 /// \brief Determine the linkage and visibility of this type. 1775 LinkageInfo getLinkageAndVisibility() const; 1776 1777 /// \brief True if the computed linkage is valid. Used for consistency 1778 /// checking. Should always return true. 1779 bool isLinkageValid() const; 1780 1781 const char *getTypeClassName() const; 1782 1783 QualType getCanonicalTypeInternal() const { 1784 return CanonicalType; 1785 } 1786 CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h 1787 LLVM_ATTRIBUTE_USED void dump() const; 1788 1789 friend class ASTReader; 1790 friend class ASTWriter; 1791 }; 1792 1793 /// \brief This will check for a TypedefType by removing any existing sugar 1794 /// until it reaches a TypedefType or a non-sugared type. 1795 template <> const TypedefType *Type::getAs() const; 1796 1797 /// \brief This will check for a TemplateSpecializationType by removing any 1798 /// existing sugar until it reaches a TemplateSpecializationType or a 1799 /// non-sugared type. 1800 template <> const TemplateSpecializationType *Type::getAs() const; 1801 1802 // We can do canonical leaf types faster, because we don't have to 1803 // worry about preserving child type decoration. 1804 #define TYPE(Class, Base) 1805 #define LEAF_TYPE(Class) \ 1806 template <> inline const Class##Type *Type::getAs() const { \ 1807 return dyn_cast<Class##Type>(CanonicalType); \ 1808 } \ 1809 template <> inline const Class##Type *Type::castAs() const { \ 1810 return cast<Class##Type>(CanonicalType); \ 1811 } 1812 #include "clang/AST/TypeNodes.def" 1813 1814 1815 /// BuiltinType - This class is used for builtin types like 'int'. Builtin 1816 /// types are always canonical and have a literal name field. 1817 class BuiltinType : public Type { 1818 public: 1819 enum Kind { 1820 #define BUILTIN_TYPE(Id, SingletonId) Id, 1821 #define LAST_BUILTIN_TYPE(Id) LastKind = Id 1822 #include "clang/AST/BuiltinTypes.def" 1823 }; 1824 1825 public: 1826 BuiltinType(Kind K) 1827 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent), 1828 /*InstantiationDependent=*/(K == Dependent), 1829 /*VariablyModified=*/false, 1830 /*Unexpanded paramter pack=*/false) { 1831 BuiltinTypeBits.Kind = K; 1832 } 1833 1834 Kind getKind() const { return static_cast<Kind>(BuiltinTypeBits.Kind); } 1835 StringRef getName(const PrintingPolicy &Policy) const; 1836 const char *getNameAsCString(const PrintingPolicy &Policy) const { 1837 // The StringRef is null-terminated. 1838 StringRef str = getName(Policy); 1839 assert(!str.empty() && str.data()[str.size()] == '\0'); 1840 return str.data(); 1841 } 1842 1843 bool isSugared() const { return false; } 1844 QualType desugar() const { return QualType(this, 0); } 1845 1846 bool isInteger() const { 1847 return getKind() >= Bool && getKind() <= Int128; 1848 } 1849 1850 bool isSignedInteger() const { 1851 return getKind() >= Char_S && getKind() <= Int128; 1852 } 1853 1854 bool isUnsignedInteger() const { 1855 return getKind() >= Bool && getKind() <= UInt128; 1856 } 1857 1858 bool isFloatingPoint() const { 1859 return getKind() >= Half && getKind() <= LongDouble; 1860 } 1861 1862 /// Determines whether the given kind corresponds to a placeholder type. 1863 static bool isPlaceholderTypeKind(Kind K) { 1864 return K >= Overload; 1865 } 1866 1867 /// Determines whether this type is a placeholder type, i.e. a type 1868 /// which cannot appear in arbitrary positions in a fully-formed 1869 /// expression. 1870 bool isPlaceholderType() const { 1871 return isPlaceholderTypeKind(getKind()); 1872 } 1873 1874 /// Determines whether this type is a placeholder type other than 1875 /// Overload. Most placeholder types require only syntactic 1876 /// information about their context in order to be resolved (e.g. 1877 /// whether it is a call expression), which means they can (and 1878 /// should) be resolved in an earlier "phase" of analysis. 1879 /// Overload expressions sometimes pick up further information 1880 /// from their context, like whether the context expects a 1881 /// specific function-pointer type, and so frequently need 1882 /// special treatment. 1883 bool isNonOverloadPlaceholderType() const { 1884 return getKind() > Overload; 1885 } 1886 1887 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1888 }; 1889 1890 /// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1891 /// types (_Complex float etc) as well as the GCC integer complex extensions. 1892 /// 1893 class ComplexType : public Type, public llvm::FoldingSetNode { 1894 QualType ElementType; 1895 ComplexType(QualType Element, QualType CanonicalPtr) : 1896 Type(Complex, CanonicalPtr, Element->isDependentType(), 1897 Element->isInstantiationDependentType(), 1898 Element->isVariablyModifiedType(), 1899 Element->containsUnexpandedParameterPack()), 1900 ElementType(Element) { 1901 } 1902 friend class ASTContext; // ASTContext creates these. 1903 1904 public: 1905 QualType getElementType() const { return ElementType; } 1906 1907 bool isSugared() const { return false; } 1908 QualType desugar() const { return QualType(this, 0); } 1909 1910 void Profile(llvm::FoldingSetNodeID &ID) { 1911 Profile(ID, getElementType()); 1912 } 1913 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1914 ID.AddPointer(Element.getAsOpaquePtr()); 1915 } 1916 1917 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1918 }; 1919 1920 /// ParenType - Sugar for parentheses used when specifying types. 1921 /// 1922 class ParenType : public Type, public llvm::FoldingSetNode { 1923 QualType Inner; 1924 1925 ParenType(QualType InnerType, QualType CanonType) : 1926 Type(Paren, CanonType, InnerType->isDependentType(), 1927 InnerType->isInstantiationDependentType(), 1928 InnerType->isVariablyModifiedType(), 1929 InnerType->containsUnexpandedParameterPack()), 1930 Inner(InnerType) { 1931 } 1932 friend class ASTContext; // ASTContext creates these. 1933 1934 public: 1935 1936 QualType getInnerType() const { return Inner; } 1937 1938 bool isSugared() const { return true; } 1939 QualType desugar() const { return getInnerType(); } 1940 1941 void Profile(llvm::FoldingSetNodeID &ID) { 1942 Profile(ID, getInnerType()); 1943 } 1944 static void Profile(llvm::FoldingSetNodeID &ID, QualType Inner) { 1945 Inner.Profile(ID); 1946 } 1947 1948 static bool classof(const Type *T) { return T->getTypeClass() == Paren; } 1949 }; 1950 1951 /// PointerType - C99 6.7.5.1 - Pointer Declarators. 1952 /// 1953 class PointerType : public Type, public llvm::FoldingSetNode { 1954 QualType PointeeType; 1955 1956 PointerType(QualType Pointee, QualType CanonicalPtr) : 1957 Type(Pointer, CanonicalPtr, Pointee->isDependentType(), 1958 Pointee->isInstantiationDependentType(), 1959 Pointee->isVariablyModifiedType(), 1960 Pointee->containsUnexpandedParameterPack()), 1961 PointeeType(Pointee) { 1962 } 1963 friend class ASTContext; // ASTContext creates these. 1964 1965 public: 1966 1967 QualType getPointeeType() const { return PointeeType; } 1968 1969 bool isSugared() const { return false; } 1970 QualType desugar() const { return QualType(this, 0); } 1971 1972 void Profile(llvm::FoldingSetNodeID &ID) { 1973 Profile(ID, getPointeeType()); 1974 } 1975 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1976 ID.AddPointer(Pointee.getAsOpaquePtr()); 1977 } 1978 1979 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1980 }; 1981 1982 /// BlockPointerType - pointer to a block type. 1983 /// This type is to represent types syntactically represented as 1984 /// "void (^)(int)", etc. Pointee is required to always be a function type. 1985 /// 1986 class BlockPointerType : public Type, public llvm::FoldingSetNode { 1987 QualType PointeeType; // Block is some kind of pointer type 1988 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1989 Type(BlockPointer, CanonicalCls, Pointee->isDependentType(), 1990 Pointee->isInstantiationDependentType(), 1991 Pointee->isVariablyModifiedType(), 1992 Pointee->containsUnexpandedParameterPack()), 1993 PointeeType(Pointee) { 1994 } 1995 friend class ASTContext; // ASTContext creates these. 1996 1997 public: 1998 1999 // Get the pointee type. Pointee is required to always be a function type. 2000 QualType getPointeeType() const { return PointeeType; } 2001 2002 bool isSugared() const { return false; } 2003 QualType desugar() const { return QualType(this, 0); } 2004 2005 void Profile(llvm::FoldingSetNodeID &ID) { 2006 Profile(ID, getPointeeType()); 2007 } 2008 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 2009 ID.AddPointer(Pointee.getAsOpaquePtr()); 2010 } 2011 2012 static bool classof(const Type *T) { 2013 return T->getTypeClass() == BlockPointer; 2014 } 2015 }; 2016 2017 /// ReferenceType - Base for LValueReferenceType and RValueReferenceType 2018 /// 2019 class ReferenceType : public Type, public llvm::FoldingSetNode { 2020 QualType PointeeType; 2021 2022 protected: 2023 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 2024 bool SpelledAsLValue) : 2025 Type(tc, CanonicalRef, Referencee->isDependentType(), 2026 Referencee->isInstantiationDependentType(), 2027 Referencee->isVariablyModifiedType(), 2028 Referencee->containsUnexpandedParameterPack()), 2029 PointeeType(Referencee) 2030 { 2031 ReferenceTypeBits.SpelledAsLValue = SpelledAsLValue; 2032 ReferenceTypeBits.InnerRef = Referencee->isReferenceType(); 2033 } 2034 2035 public: 2036 bool isSpelledAsLValue() const { return ReferenceTypeBits.SpelledAsLValue; } 2037 bool isInnerRef() const { return ReferenceTypeBits.InnerRef; } 2038 2039 QualType getPointeeTypeAsWritten() const { return PointeeType; } 2040 QualType getPointeeType() const { 2041 // FIXME: this might strip inner qualifiers; okay? 2042 const ReferenceType *T = this; 2043 while (T->isInnerRef()) 2044 T = T->PointeeType->castAs<ReferenceType>(); 2045 return T->PointeeType; 2046 } 2047 2048 void Profile(llvm::FoldingSetNodeID &ID) { 2049 Profile(ID, PointeeType, isSpelledAsLValue()); 2050 } 2051 static void Profile(llvm::FoldingSetNodeID &ID, 2052 QualType Referencee, 2053 bool SpelledAsLValue) { 2054 ID.AddPointer(Referencee.getAsOpaquePtr()); 2055 ID.AddBoolean(SpelledAsLValue); 2056 } 2057 2058 static bool classof(const Type *T) { 2059 return T->getTypeClass() == LValueReference || 2060 T->getTypeClass() == RValueReference; 2061 } 2062 }; 2063 2064 /// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 2065 /// 2066 class LValueReferenceType : public ReferenceType { 2067 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 2068 bool SpelledAsLValue) : 2069 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 2070 {} 2071 friend class ASTContext; // ASTContext creates these 2072 public: 2073 bool isSugared() const { return false; } 2074 QualType desugar() const { return QualType(this, 0); } 2075 2076 static bool classof(const Type *T) { 2077 return T->getTypeClass() == LValueReference; 2078 } 2079 }; 2080 2081 /// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 2082 /// 2083 class RValueReferenceType : public ReferenceType { 2084 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 2085 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 2086 } 2087 friend class ASTContext; // ASTContext creates these 2088 public: 2089 bool isSugared() const { return false; } 2090 QualType desugar() const { return QualType(this, 0); } 2091 2092 static bool classof(const Type *T) { 2093 return T->getTypeClass() == RValueReference; 2094 } 2095 }; 2096 2097 /// MemberPointerType - C++ 8.3.3 - Pointers to members 2098 /// 2099 class MemberPointerType : public Type, public llvm::FoldingSetNode { 2100 QualType PointeeType; 2101 /// The class of which the pointee is a member. Must ultimately be a 2102 /// RecordType, but could be a typedef or a template parameter too. 2103 const Type *Class; 2104 2105 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 2106 Type(MemberPointer, CanonicalPtr, 2107 Cls->isDependentType() || Pointee->isDependentType(), 2108 (Cls->isInstantiationDependentType() || 2109 Pointee->isInstantiationDependentType()), 2110 Pointee->isVariablyModifiedType(), 2111 (Cls->containsUnexpandedParameterPack() || 2112 Pointee->containsUnexpandedParameterPack())), 2113 PointeeType(Pointee), Class(Cls) { 2114 } 2115 friend class ASTContext; // ASTContext creates these. 2116 2117 public: 2118 QualType getPointeeType() const { return PointeeType; } 2119 2120 /// Returns true if the member type (i.e. the pointee type) is a 2121 /// function type rather than a data-member type. 2122 bool isMemberFunctionPointer() const { 2123 return PointeeType->isFunctionProtoType(); 2124 } 2125 2126 /// Returns true if the member type (i.e. the pointee type) is a 2127 /// data type rather than a function type. 2128 bool isMemberDataPointer() const { 2129 return !PointeeType->isFunctionProtoType(); 2130 } 2131 2132 const Type *getClass() const { return Class; } 2133 2134 bool isSugared() const { return false; } 2135 QualType desugar() const { return QualType(this, 0); } 2136 2137 void Profile(llvm::FoldingSetNodeID &ID) { 2138 Profile(ID, getPointeeType(), getClass()); 2139 } 2140 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 2141 const Type *Class) { 2142 ID.AddPointer(Pointee.getAsOpaquePtr()); 2143 ID.AddPointer(Class); 2144 } 2145 2146 static bool classof(const Type *T) { 2147 return T->getTypeClass() == MemberPointer; 2148 } 2149 }; 2150 2151 /// ArrayType - C99 6.7.5.2 - Array Declarators. 2152 /// 2153 class ArrayType : public Type, public llvm::FoldingSetNode { 2154 public: 2155 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 2156 /// an array with a static size (e.g. int X[static 4]), or an array 2157 /// with a star size (e.g. int X[*]). 2158 /// 'static' is only allowed on function parameters. 2159 enum ArraySizeModifier { 2160 Normal, Static, Star 2161 }; 2162 private: 2163 /// ElementType - The element type of the array. 2164 QualType ElementType; 2165 2166 protected: 2167 // C++ [temp.dep.type]p1: 2168 // A type is dependent if it is... 2169 // - an array type constructed from any dependent type or whose 2170 // size is specified by a constant expression that is 2171 // value-dependent, 2172 ArrayType(TypeClass tc, QualType et, QualType can, 2173 ArraySizeModifier sm, unsigned tq, 2174 bool ContainsUnexpandedParameterPack) 2175 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray, 2176 et->isInstantiationDependentType() || tc == DependentSizedArray, 2177 (tc == VariableArray || et->isVariablyModifiedType()), 2178 ContainsUnexpandedParameterPack), 2179 ElementType(et) { 2180 ArrayTypeBits.IndexTypeQuals = tq; 2181 ArrayTypeBits.SizeModifier = sm; 2182 } 2183 2184 friend class ASTContext; // ASTContext creates these. 2185 2186 public: 2187 QualType getElementType() const { return ElementType; } 2188 ArraySizeModifier getSizeModifier() const { 2189 return ArraySizeModifier(ArrayTypeBits.SizeModifier); 2190 } 2191 Qualifiers getIndexTypeQualifiers() const { 2192 return Qualifiers::fromCVRMask(getIndexTypeCVRQualifiers()); 2193 } 2194 unsigned getIndexTypeCVRQualifiers() const { 2195 return ArrayTypeBits.IndexTypeQuals; 2196 } 2197 2198 static bool classof(const Type *T) { 2199 return T->getTypeClass() == ConstantArray || 2200 T->getTypeClass() == VariableArray || 2201 T->getTypeClass() == IncompleteArray || 2202 T->getTypeClass() == DependentSizedArray; 2203 } 2204 }; 2205 2206 /// ConstantArrayType - This class represents the canonical version of 2207 /// C arrays with a specified constant size. For example, the canonical 2208 /// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 2209 /// type is 'int' and the size is 404. 2210 class ConstantArrayType : public ArrayType { 2211 llvm::APInt Size; // Allows us to unique the type. 2212 2213 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 2214 ArraySizeModifier sm, unsigned tq) 2215 : ArrayType(ConstantArray, et, can, sm, tq, 2216 et->containsUnexpandedParameterPack()), 2217 Size(size) {} 2218 protected: 2219 ConstantArrayType(TypeClass tc, QualType et, QualType can, 2220 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 2221 : ArrayType(tc, et, can, sm, tq, et->containsUnexpandedParameterPack()), 2222 Size(size) {} 2223 friend class ASTContext; // ASTContext creates these. 2224 public: 2225 const llvm::APInt &getSize() const { return Size; } 2226 bool isSugared() const { return false; } 2227 QualType desugar() const { return QualType(this, 0); } 2228 2229 2230 /// \brief Determine the number of bits required to address a member of 2231 // an array with the given element type and number of elements. 2232 static unsigned getNumAddressingBits(ASTContext &Context, 2233 QualType ElementType, 2234 const llvm::APInt &NumElements); 2235 2236 /// \brief Determine the maximum number of active bits that an array's size 2237 /// can require, which limits the maximum size of the array. 2238 static unsigned getMaxSizeBits(ASTContext &Context); 2239 2240 void Profile(llvm::FoldingSetNodeID &ID) { 2241 Profile(ID, getElementType(), getSize(), 2242 getSizeModifier(), getIndexTypeCVRQualifiers()); 2243 } 2244 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 2245 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 2246 unsigned TypeQuals) { 2247 ID.AddPointer(ET.getAsOpaquePtr()); 2248 ID.AddInteger(ArraySize.getZExtValue()); 2249 ID.AddInteger(SizeMod); 2250 ID.AddInteger(TypeQuals); 2251 } 2252 static bool classof(const Type *T) { 2253 return T->getTypeClass() == ConstantArray; 2254 } 2255 }; 2256 2257 /// IncompleteArrayType - This class represents C arrays with an unspecified 2258 /// size. For example 'int A[]' has an IncompleteArrayType where the element 2259 /// type is 'int' and the size is unspecified. 2260 class IncompleteArrayType : public ArrayType { 2261 2262 IncompleteArrayType(QualType et, QualType can, 2263 ArraySizeModifier sm, unsigned tq) 2264 : ArrayType(IncompleteArray, et, can, sm, tq, 2265 et->containsUnexpandedParameterPack()) {} 2266 friend class ASTContext; // ASTContext creates these. 2267 public: 2268 bool isSugared() const { return false; } 2269 QualType desugar() const { return QualType(this, 0); } 2270 2271 static bool classof(const Type *T) { 2272 return T->getTypeClass() == IncompleteArray; 2273 } 2274 2275 friend class StmtIteratorBase; 2276 2277 void Profile(llvm::FoldingSetNodeID &ID) { 2278 Profile(ID, getElementType(), getSizeModifier(), 2279 getIndexTypeCVRQualifiers()); 2280 } 2281 2282 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 2283 ArraySizeModifier SizeMod, unsigned TypeQuals) { 2284 ID.AddPointer(ET.getAsOpaquePtr()); 2285 ID.AddInteger(SizeMod); 2286 ID.AddInteger(TypeQuals); 2287 } 2288 }; 2289 2290 /// VariableArrayType - This class represents C arrays with a specified size 2291 /// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 2292 /// Since the size expression is an arbitrary expression, we store it as such. 2293 /// 2294 /// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 2295 /// should not be: two lexically equivalent variable array types could mean 2296 /// different things, for example, these variables do not have the same type 2297 /// dynamically: 2298 /// 2299 /// void foo(int x) { 2300 /// int Y[x]; 2301 /// ++x; 2302 /// int Z[x]; 2303 /// } 2304 /// 2305 class VariableArrayType : public ArrayType { 2306 /// SizeExpr - An assignment expression. VLA's are only permitted within 2307 /// a function block. 2308 Stmt *SizeExpr; 2309 /// Brackets - The left and right array brackets. 2310 SourceRange Brackets; 2311 2312 VariableArrayType(QualType et, QualType can, Expr *e, 2313 ArraySizeModifier sm, unsigned tq, 2314 SourceRange brackets) 2315 : ArrayType(VariableArray, et, can, sm, tq, 2316 et->containsUnexpandedParameterPack()), 2317 SizeExpr((Stmt*) e), Brackets(brackets) {} 2318 friend class ASTContext; // ASTContext creates these. 2319 2320 public: 2321 Expr *getSizeExpr() const { 2322 // We use C-style casts instead of cast<> here because we do not wish 2323 // to have a dependency of Type.h on Stmt.h/Expr.h. 2324 return (Expr*) SizeExpr; 2325 } 2326 SourceRange getBracketsRange() const { return Brackets; } 2327 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 2328 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 2329 2330 bool isSugared() const { return false; } 2331 QualType desugar() const { return QualType(this, 0); } 2332 2333 static bool classof(const Type *T) { 2334 return T->getTypeClass() == VariableArray; 2335 } 2336 2337 friend class StmtIteratorBase; 2338 2339 void Profile(llvm::FoldingSetNodeID &ID) { 2340 llvm_unreachable("Cannot unique VariableArrayTypes."); 2341 } 2342 }; 2343 2344 /// DependentSizedArrayType - This type represents an array type in 2345 /// C++ whose size is a value-dependent expression. For example: 2346 /// 2347 /// \code 2348 /// template<typename T, int Size> 2349 /// class array { 2350 /// T data[Size]; 2351 /// }; 2352 /// \endcode 2353 /// 2354 /// For these types, we won't actually know what the array bound is 2355 /// until template instantiation occurs, at which point this will 2356 /// become either a ConstantArrayType or a VariableArrayType. 2357 class DependentSizedArrayType : public ArrayType { 2358 const ASTContext &Context; 2359 2360 /// \brief An assignment expression that will instantiate to the 2361 /// size of the array. 2362 /// 2363 /// The expression itself might be NULL, in which case the array 2364 /// type will have its size deduced from an initializer. 2365 Stmt *SizeExpr; 2366 2367 /// Brackets - The left and right array brackets. 2368 SourceRange Brackets; 2369 2370 DependentSizedArrayType(const ASTContext &Context, QualType et, QualType can, 2371 Expr *e, ArraySizeModifier sm, unsigned tq, 2372 SourceRange brackets); 2373 2374 friend class ASTContext; // ASTContext creates these. 2375 2376 public: 2377 Expr *getSizeExpr() const { 2378 // We use C-style casts instead of cast<> here because we do not wish 2379 // to have a dependency of Type.h on Stmt.h/Expr.h. 2380 return (Expr*) SizeExpr; 2381 } 2382 SourceRange getBracketsRange() const { return Brackets; } 2383 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 2384 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 2385 2386 bool isSugared() const { return false; } 2387 QualType desugar() const { return QualType(this, 0); } 2388 2389 static bool classof(const Type *T) { 2390 return T->getTypeClass() == DependentSizedArray; 2391 } 2392 2393 friend class StmtIteratorBase; 2394 2395 2396 void Profile(llvm::FoldingSetNodeID &ID) { 2397 Profile(ID, Context, getElementType(), 2398 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 2399 } 2400 2401 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2402 QualType ET, ArraySizeModifier SizeMod, 2403 unsigned TypeQuals, Expr *E); 2404 }; 2405 2406 /// DependentSizedExtVectorType - This type represent an extended vector type 2407 /// where either the type or size is dependent. For example: 2408 /// @code 2409 /// template<typename T, int Size> 2410 /// class vector { 2411 /// typedef T __attribute__((ext_vector_type(Size))) type; 2412 /// } 2413 /// @endcode 2414 class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 2415 const ASTContext &Context; 2416 Expr *SizeExpr; 2417 /// ElementType - The element type of the array. 2418 QualType ElementType; 2419 SourceLocation loc; 2420 2421 DependentSizedExtVectorType(const ASTContext &Context, QualType ElementType, 2422 QualType can, Expr *SizeExpr, SourceLocation loc); 2423 2424 friend class ASTContext; 2425 2426 public: 2427 Expr *getSizeExpr() const { return SizeExpr; } 2428 QualType getElementType() const { return ElementType; } 2429 SourceLocation getAttributeLoc() const { return loc; } 2430 2431 bool isSugared() const { return false; } 2432 QualType desugar() const { return QualType(this, 0); } 2433 2434 static bool classof(const Type *T) { 2435 return T->getTypeClass() == DependentSizedExtVector; 2436 } 2437 2438 void Profile(llvm::FoldingSetNodeID &ID) { 2439 Profile(ID, Context, getElementType(), getSizeExpr()); 2440 } 2441 2442 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2443 QualType ElementType, Expr *SizeExpr); 2444 }; 2445 2446 2447 /// VectorType - GCC generic vector type. This type is created using 2448 /// __attribute__((vector_size(n)), where "n" specifies the vector size in 2449 /// bytes; or from an Altivec __vector or vector declaration. 2450 /// Since the constructor takes the number of vector elements, the 2451 /// client is responsible for converting the size into the number of elements. 2452 class VectorType : public Type, public llvm::FoldingSetNode { 2453 public: 2454 enum VectorKind { 2455 GenericVector, // not a target-specific vector type 2456 AltiVecVector, // is AltiVec vector 2457 AltiVecPixel, // is AltiVec 'vector Pixel' 2458 AltiVecBool, // is AltiVec 'vector bool ...' 2459 NeonVector, // is ARM Neon vector 2460 NeonPolyVector // is ARM Neon polynomial vector 2461 }; 2462 protected: 2463 /// ElementType - The element type of the vector. 2464 QualType ElementType; 2465 2466 VectorType(QualType vecType, unsigned nElements, QualType canonType, 2467 VectorKind vecKind); 2468 2469 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 2470 QualType canonType, VectorKind vecKind); 2471 2472 friend class ASTContext; // ASTContext creates these. 2473 2474 public: 2475 2476 QualType getElementType() const { return ElementType; } 2477 unsigned getNumElements() const { return VectorTypeBits.NumElements; } 2478 2479 bool isSugared() const { return false; } 2480 QualType desugar() const { return QualType(this, 0); } 2481 2482 VectorKind getVectorKind() const { 2483 return VectorKind(VectorTypeBits.VecKind); 2484 } 2485 2486 void Profile(llvm::FoldingSetNodeID &ID) { 2487 Profile(ID, getElementType(), getNumElements(), 2488 getTypeClass(), getVectorKind()); 2489 } 2490 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 2491 unsigned NumElements, TypeClass TypeClass, 2492 VectorKind VecKind) { 2493 ID.AddPointer(ElementType.getAsOpaquePtr()); 2494 ID.AddInteger(NumElements); 2495 ID.AddInteger(TypeClass); 2496 ID.AddInteger(VecKind); 2497 } 2498 2499 static bool classof(const Type *T) { 2500 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 2501 } 2502 }; 2503 2504 /// ExtVectorType - Extended vector type. This type is created using 2505 /// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 2506 /// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 2507 /// class enables syntactic extensions, like Vector Components for accessing 2508 /// points, colors, and textures (modeled after OpenGL Shading Language). 2509 class ExtVectorType : public VectorType { 2510 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 2511 VectorType(ExtVector, vecType, nElements, canonType, GenericVector) {} 2512 friend class ASTContext; // ASTContext creates these. 2513 public: 2514 static int getPointAccessorIdx(char c) { 2515 switch (c) { 2516 default: return -1; 2517 case 'x': case 'r': return 0; 2518 case 'y': case 'g': return 1; 2519 case 'z': case 'b': return 2; 2520 case 'w': case 'a': return 3; 2521 } 2522 } 2523 static int getNumericAccessorIdx(char c) { 2524 switch (c) { 2525 default: return -1; 2526 case '0': return 0; 2527 case '1': return 1; 2528 case '2': return 2; 2529 case '3': return 3; 2530 case '4': return 4; 2531 case '5': return 5; 2532 case '6': return 6; 2533 case '7': return 7; 2534 case '8': return 8; 2535 case '9': return 9; 2536 case 'A': 2537 case 'a': return 10; 2538 case 'B': 2539 case 'b': return 11; 2540 case 'C': 2541 case 'c': return 12; 2542 case 'D': 2543 case 'd': return 13; 2544 case 'E': 2545 case 'e': return 14; 2546 case 'F': 2547 case 'f': return 15; 2548 } 2549 } 2550 2551 static int getAccessorIdx(char c) { 2552 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 2553 return getNumericAccessorIdx(c); 2554 } 2555 2556 bool isAccessorWithinNumElements(char c) const { 2557 if (int idx = getAccessorIdx(c)+1) 2558 return unsigned(idx-1) < getNumElements(); 2559 return false; 2560 } 2561 bool isSugared() const { return false; } 2562 QualType desugar() const { return QualType(this, 0); } 2563 2564 static bool classof(const Type *T) { 2565 return T->getTypeClass() == ExtVector; 2566 } 2567 }; 2568 2569 /// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 2570 /// class of FunctionNoProtoType and FunctionProtoType. 2571 /// 2572 class FunctionType : public Type { 2573 // The type returned by the function. 2574 QualType ResultType; 2575 2576 public: 2577 /// ExtInfo - A class which abstracts out some details necessary for 2578 /// making a call. 2579 /// 2580 /// It is not actually used directly for storing this information in 2581 /// a FunctionType, although FunctionType does currently use the 2582 /// same bit-pattern. 2583 /// 2584 // If you add a field (say Foo), other than the obvious places (both, 2585 // constructors, compile failures), what you need to update is 2586 // * Operator== 2587 // * getFoo 2588 // * withFoo 2589 // * functionType. Add Foo, getFoo. 2590 // * ASTContext::getFooType 2591 // * ASTContext::mergeFunctionTypes 2592 // * FunctionNoProtoType::Profile 2593 // * FunctionProtoType::Profile 2594 // * TypePrinter::PrintFunctionProto 2595 // * AST read and write 2596 // * Codegen 2597 class ExtInfo { 2598 // Feel free to rearrange or add bits, but if you go over 9, 2599 // you'll need to adjust both the Bits field below and 2600 // Type::FunctionTypeBitfields. 2601 2602 // | CC |noreturn|produces|regparm| 2603 // |0 .. 3| 4 | 5 | 6 .. 8| 2604 // 2605 // regparm is either 0 (no regparm attribute) or the regparm value+1. 2606 enum { CallConvMask = 0xF }; 2607 enum { NoReturnMask = 0x10 }; 2608 enum { ProducesResultMask = 0x20 }; 2609 enum { RegParmMask = ~(CallConvMask | NoReturnMask | ProducesResultMask), 2610 RegParmOffset = 6 }; // Assumed to be the last field 2611 2612 uint16_t Bits; 2613 2614 ExtInfo(unsigned Bits) : Bits(static_cast<uint16_t>(Bits)) {} 2615 2616 friend class FunctionType; 2617 2618 public: 2619 // Constructor with no defaults. Use this when you know that you 2620 // have all the elements (when reading an AST file for example). 2621 ExtInfo(bool noReturn, bool hasRegParm, unsigned regParm, CallingConv cc, 2622 bool producesResult) { 2623 assert((!hasRegParm || regParm < 7) && "Invalid regparm value"); 2624 Bits = ((unsigned) cc) | 2625 (noReturn ? NoReturnMask : 0) | 2626 (producesResult ? ProducesResultMask : 0) | 2627 (hasRegParm ? ((regParm + 1) << RegParmOffset) : 0); 2628 } 2629 2630 // Constructor with all defaults. Use when for example creating a 2631 // function know to use defaults. 2632 ExtInfo() : Bits(0) {} 2633 2634 bool getNoReturn() const { return Bits & NoReturnMask; } 2635 bool getProducesResult() const { return Bits & ProducesResultMask; } 2636 bool getHasRegParm() const { return (Bits >> RegParmOffset) != 0; } 2637 unsigned getRegParm() const { 2638 unsigned RegParm = Bits >> RegParmOffset; 2639 if (RegParm > 0) 2640 --RegParm; 2641 return RegParm; 2642 } 2643 CallingConv getCC() const { return CallingConv(Bits & CallConvMask); } 2644 2645 bool operator==(ExtInfo Other) const { 2646 return Bits == Other.Bits; 2647 } 2648 bool operator!=(ExtInfo Other) const { 2649 return Bits != Other.Bits; 2650 } 2651 2652 // Note that we don't have setters. That is by design, use 2653 // the following with methods instead of mutating these objects. 2654 2655 ExtInfo withNoReturn(bool noReturn) const { 2656 if (noReturn) 2657 return ExtInfo(Bits | NoReturnMask); 2658 else 2659 return ExtInfo(Bits & ~NoReturnMask); 2660 } 2661 2662 ExtInfo withProducesResult(bool producesResult) const { 2663 if (producesResult) 2664 return ExtInfo(Bits | ProducesResultMask); 2665 else 2666 return ExtInfo(Bits & ~ProducesResultMask); 2667 } 2668 2669 ExtInfo withRegParm(unsigned RegParm) const { 2670 assert(RegParm < 7 && "Invalid regparm value"); 2671 return ExtInfo((Bits & ~RegParmMask) | 2672 ((RegParm + 1) << RegParmOffset)); 2673 } 2674 2675 ExtInfo withCallingConv(CallingConv cc) const { 2676 return ExtInfo((Bits & ~CallConvMask) | (unsigned) cc); 2677 } 2678 2679 void Profile(llvm::FoldingSetNodeID &ID) const { 2680 ID.AddInteger(Bits); 2681 } 2682 }; 2683 2684 protected: 2685 FunctionType(TypeClass tc, QualType res, 2686 unsigned typeQuals, QualType Canonical, bool Dependent, 2687 bool InstantiationDependent, 2688 bool VariablyModified, bool ContainsUnexpandedParameterPack, 2689 ExtInfo Info) 2690 : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified, 2691 ContainsUnexpandedParameterPack), 2692 ResultType(res) { 2693 FunctionTypeBits.ExtInfo = Info.Bits; 2694 FunctionTypeBits.TypeQuals = typeQuals; 2695 } 2696 unsigned getTypeQuals() const { return FunctionTypeBits.TypeQuals; } 2697 2698 public: 2699 2700 QualType getResultType() const { return ResultType; } 2701 2702 bool getHasRegParm() const { return getExtInfo().getHasRegParm(); } 2703 unsigned getRegParmType() const { return getExtInfo().getRegParm(); } 2704 /// \brief Determine whether this function type includes the GNU noreturn 2705 /// attribute. The C++11 [[noreturn]] attribute does not affect the function 2706 /// type. 2707 bool getNoReturnAttr() const { return getExtInfo().getNoReturn(); } 2708 CallingConv getCallConv() const { return getExtInfo().getCC(); } 2709 ExtInfo getExtInfo() const { return ExtInfo(FunctionTypeBits.ExtInfo); } 2710 bool isConst() const { return getTypeQuals() & Qualifiers::Const; } 2711 bool isVolatile() const { return getTypeQuals() & Qualifiers::Volatile; } 2712 bool isRestrict() const { return getTypeQuals() & Qualifiers::Restrict; } 2713 2714 /// \brief Determine the type of an expression that calls a function of 2715 /// this type. 2716 QualType getCallResultType(ASTContext &Context) const { 2717 return getResultType().getNonLValueExprType(Context); 2718 } 2719 2720 static StringRef getNameForCallConv(CallingConv CC); 2721 2722 static bool classof(const Type *T) { 2723 return T->getTypeClass() == FunctionNoProto || 2724 T->getTypeClass() == FunctionProto; 2725 } 2726 }; 2727 2728 /// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 2729 /// no information available about its arguments. 2730 class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 2731 FunctionNoProtoType(QualType Result, QualType Canonical, ExtInfo Info) 2732 : FunctionType(FunctionNoProto, Result, 0, Canonical, 2733 /*Dependent=*/false, /*InstantiationDependent=*/false, 2734 Result->isVariablyModifiedType(), 2735 /*ContainsUnexpandedParameterPack=*/false, Info) {} 2736 2737 friend class ASTContext; // ASTContext creates these. 2738 2739 public: 2740 // No additional state past what FunctionType provides. 2741 2742 bool isSugared() const { return false; } 2743 QualType desugar() const { return QualType(this, 0); } 2744 2745 void Profile(llvm::FoldingSetNodeID &ID) { 2746 Profile(ID, getResultType(), getExtInfo()); 2747 } 2748 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 2749 ExtInfo Info) { 2750 Info.Profile(ID); 2751 ID.AddPointer(ResultType.getAsOpaquePtr()); 2752 } 2753 2754 static bool classof(const Type *T) { 2755 return T->getTypeClass() == FunctionNoProto; 2756 } 2757 }; 2758 2759 /// FunctionProtoType - Represents a prototype with argument type info, e.g. 2760 /// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 2761 /// arguments, not as having a single void argument. Such a type can have an 2762 /// exception specification, but this specification is not part of the canonical 2763 /// type. 2764 class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 2765 public: 2766 /// ExtProtoInfo - Extra information about a function prototype. 2767 struct ExtProtoInfo { 2768 ExtProtoInfo() : 2769 Variadic(false), HasTrailingReturn(false), TypeQuals(0), 2770 ExceptionSpecType(EST_None), RefQualifier(RQ_None), 2771 NumExceptions(0), Exceptions(0), NoexceptExpr(0), 2772 ExceptionSpecDecl(0), ExceptionSpecTemplate(0), 2773 ConsumedArguments(0) {} 2774 2775 FunctionType::ExtInfo ExtInfo; 2776 bool Variadic : 1; 2777 bool HasTrailingReturn : 1; 2778 unsigned char TypeQuals; 2779 ExceptionSpecificationType ExceptionSpecType; 2780 RefQualifierKind RefQualifier; 2781 unsigned NumExceptions; 2782 const QualType *Exceptions; 2783 Expr *NoexceptExpr; 2784 FunctionDecl *ExceptionSpecDecl; 2785 FunctionDecl *ExceptionSpecTemplate; 2786 const bool *ConsumedArguments; 2787 }; 2788 2789 private: 2790 /// \brief Determine whether there are any argument types that 2791 /// contain an unexpanded parameter pack. 2792 static bool containsAnyUnexpandedParameterPack(const QualType *ArgArray, 2793 unsigned numArgs) { 2794 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 2795 if (ArgArray[Idx]->containsUnexpandedParameterPack()) 2796 return true; 2797 2798 return false; 2799 } 2800 2801 FunctionProtoType(QualType result, ArrayRef<QualType> args, 2802 QualType canonical, const ExtProtoInfo &epi); 2803 2804 /// NumArgs - The number of arguments this function has, not counting '...'. 2805 unsigned NumArgs : 15; 2806 2807 /// NumExceptions - The number of types in the exception spec, if any. 2808 unsigned NumExceptions : 9; 2809 2810 /// ExceptionSpecType - The type of exception specification this function has. 2811 unsigned ExceptionSpecType : 3; 2812 2813 /// HasAnyConsumedArgs - Whether this function has any consumed arguments. 2814 unsigned HasAnyConsumedArgs : 1; 2815 2816 /// Variadic - Whether the function is variadic. 2817 unsigned Variadic : 1; 2818 2819 /// HasTrailingReturn - Whether this function has a trailing return type. 2820 unsigned HasTrailingReturn : 1; 2821 2822 /// \brief The ref-qualifier associated with a \c FunctionProtoType. 2823 /// 2824 /// This is a value of type \c RefQualifierKind. 2825 unsigned RefQualifier : 2; 2826 2827 // ArgInfo - There is an variable size array after the class in memory that 2828 // holds the argument types. 2829 2830 // Exceptions - There is another variable size array after ArgInfo that 2831 // holds the exception types. 2832 2833 // NoexceptExpr - Instead of Exceptions, there may be a single Expr* pointing 2834 // to the expression in the noexcept() specifier. 2835 2836 // ExceptionSpecDecl, ExceptionSpecTemplate - Instead of Exceptions, there may 2837 // be a pair of FunctionDecl* pointing to the function which should be used to 2838 // instantiate this function type's exception specification, and the function 2839 // from which it should be instantiated. 2840 2841 // ConsumedArgs - A variable size array, following Exceptions 2842 // and of length NumArgs, holding flags indicating which arguments 2843 // are consumed. This only appears if HasAnyConsumedArgs is true. 2844 2845 friend class ASTContext; // ASTContext creates these. 2846 2847 const bool *getConsumedArgsBuffer() const { 2848 assert(hasAnyConsumedArgs()); 2849 2850 // Find the end of the exceptions. 2851 Expr * const *eh_end = reinterpret_cast<Expr * const *>(arg_type_end()); 2852 if (getExceptionSpecType() != EST_ComputedNoexcept) 2853 eh_end += NumExceptions; 2854 else 2855 eh_end += 1; // NoexceptExpr 2856 2857 return reinterpret_cast<const bool*>(eh_end); 2858 } 2859 2860 public: 2861 unsigned getNumArgs() const { return NumArgs; } 2862 QualType getArgType(unsigned i) const { 2863 assert(i < NumArgs && "Invalid argument number!"); 2864 return arg_type_begin()[i]; 2865 } 2866 ArrayRef<QualType> getArgTypes() const { 2867 return ArrayRef<QualType>(arg_type_begin(), arg_type_end()); 2868 } 2869 2870 ExtProtoInfo getExtProtoInfo() const { 2871 ExtProtoInfo EPI; 2872 EPI.ExtInfo = getExtInfo(); 2873 EPI.Variadic = isVariadic(); 2874 EPI.HasTrailingReturn = hasTrailingReturn(); 2875 EPI.ExceptionSpecType = getExceptionSpecType(); 2876 EPI.TypeQuals = static_cast<unsigned char>(getTypeQuals()); 2877 EPI.RefQualifier = getRefQualifier(); 2878 if (EPI.ExceptionSpecType == EST_Dynamic) { 2879 EPI.NumExceptions = NumExceptions; 2880 EPI.Exceptions = exception_begin(); 2881 } else if (EPI.ExceptionSpecType == EST_ComputedNoexcept) { 2882 EPI.NoexceptExpr = getNoexceptExpr(); 2883 } else if (EPI.ExceptionSpecType == EST_Uninstantiated) { 2884 EPI.ExceptionSpecDecl = getExceptionSpecDecl(); 2885 EPI.ExceptionSpecTemplate = getExceptionSpecTemplate(); 2886 } else if (EPI.ExceptionSpecType == EST_Unevaluated) { 2887 EPI.ExceptionSpecDecl = getExceptionSpecDecl(); 2888 } 2889 if (hasAnyConsumedArgs()) 2890 EPI.ConsumedArguments = getConsumedArgsBuffer(); 2891 return EPI; 2892 } 2893 2894 /// \brief Get the kind of exception specification on this function. 2895 ExceptionSpecificationType getExceptionSpecType() const { 2896 return static_cast<ExceptionSpecificationType>(ExceptionSpecType); 2897 } 2898 /// \brief Return whether this function has any kind of exception spec. 2899 bool hasExceptionSpec() const { 2900 return getExceptionSpecType() != EST_None; 2901 } 2902 /// \brief Return whether this function has a dynamic (throw) exception spec. 2903 bool hasDynamicExceptionSpec() const { 2904 return isDynamicExceptionSpec(getExceptionSpecType()); 2905 } 2906 /// \brief Return whether this function has a noexcept exception spec. 2907 bool hasNoexceptExceptionSpec() const { 2908 return isNoexceptExceptionSpec(getExceptionSpecType()); 2909 } 2910 /// \brief Result type of getNoexceptSpec(). 2911 enum NoexceptResult { 2912 NR_NoNoexcept, ///< There is no noexcept specifier. 2913 NR_BadNoexcept, ///< The noexcept specifier has a bad expression. 2914 NR_Dependent, ///< The noexcept specifier is dependent. 2915 NR_Throw, ///< The noexcept specifier evaluates to false. 2916 NR_Nothrow ///< The noexcept specifier evaluates to true. 2917 }; 2918 /// \brief Get the meaning of the noexcept spec on this function, if any. 2919 NoexceptResult getNoexceptSpec(ASTContext &Ctx) const; 2920 unsigned getNumExceptions() const { return NumExceptions; } 2921 QualType getExceptionType(unsigned i) const { 2922 assert(i < NumExceptions && "Invalid exception number!"); 2923 return exception_begin()[i]; 2924 } 2925 Expr *getNoexceptExpr() const { 2926 if (getExceptionSpecType() != EST_ComputedNoexcept) 2927 return 0; 2928 // NoexceptExpr sits where the arguments end. 2929 return *reinterpret_cast<Expr *const *>(arg_type_end()); 2930 } 2931 /// \brief If this function type has an exception specification which hasn't 2932 /// been determined yet (either because it has not been evaluated or because 2933 /// it has not been instantiated), this is the function whose exception 2934 /// specification is represented by this type. 2935 FunctionDecl *getExceptionSpecDecl() const { 2936 if (getExceptionSpecType() != EST_Uninstantiated && 2937 getExceptionSpecType() != EST_Unevaluated) 2938 return 0; 2939 return reinterpret_cast<FunctionDecl * const *>(arg_type_end())[0]; 2940 } 2941 /// \brief If this function type has an uninstantiated exception 2942 /// specification, this is the function whose exception specification 2943 /// should be instantiated to find the exception specification for 2944 /// this type. 2945 FunctionDecl *getExceptionSpecTemplate() const { 2946 if (getExceptionSpecType() != EST_Uninstantiated) 2947 return 0; 2948 return reinterpret_cast<FunctionDecl * const *>(arg_type_end())[1]; 2949 } 2950 bool isNothrow(ASTContext &Ctx) const { 2951 ExceptionSpecificationType EST = getExceptionSpecType(); 2952 assert(EST != EST_Unevaluated && EST != EST_Uninstantiated); 2953 if (EST == EST_DynamicNone || EST == EST_BasicNoexcept) 2954 return true; 2955 if (EST != EST_ComputedNoexcept) 2956 return false; 2957 return getNoexceptSpec(Ctx) == NR_Nothrow; 2958 } 2959 2960 bool isVariadic() const { return Variadic; } 2961 2962 /// \brief Determines whether this function prototype contains a 2963 /// parameter pack at the end. 2964 /// 2965 /// A function template whose last parameter is a parameter pack can be 2966 /// called with an arbitrary number of arguments, much like a variadic 2967 /// function. 2968 bool isTemplateVariadic() const; 2969 2970 bool hasTrailingReturn() const { return HasTrailingReturn; } 2971 2972 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 2973 2974 2975 /// \brief Retrieve the ref-qualifier associated with this function type. 2976 RefQualifierKind getRefQualifier() const { 2977 return static_cast<RefQualifierKind>(RefQualifier); 2978 } 2979 2980 typedef const QualType *arg_type_iterator; 2981 arg_type_iterator arg_type_begin() const { 2982 return reinterpret_cast<const QualType *>(this+1); 2983 } 2984 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 2985 2986 typedef const QualType *exception_iterator; 2987 exception_iterator exception_begin() const { 2988 // exceptions begin where arguments end 2989 return arg_type_end(); 2990 } 2991 exception_iterator exception_end() const { 2992 if (getExceptionSpecType() != EST_Dynamic) 2993 return exception_begin(); 2994 return exception_begin() + NumExceptions; 2995 } 2996 2997 bool hasAnyConsumedArgs() const { 2998 return HasAnyConsumedArgs; 2999 } 3000 bool isArgConsumed(unsigned I) const { 3001 assert(I < getNumArgs() && "argument index out of range!"); 3002 if (hasAnyConsumedArgs()) 3003 return getConsumedArgsBuffer()[I]; 3004 return false; 3005 } 3006 3007 bool isSugared() const { return false; } 3008 QualType desugar() const { return QualType(this, 0); } 3009 3010 void printExceptionSpecification(raw_ostream &OS, 3011 const PrintingPolicy &Policy) const; 3012 3013 static bool classof(const Type *T) { 3014 return T->getTypeClass() == FunctionProto; 3015 } 3016 3017 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx); 3018 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 3019 arg_type_iterator ArgTys, unsigned NumArgs, 3020 const ExtProtoInfo &EPI, const ASTContext &Context); 3021 }; 3022 3023 3024 /// \brief Represents the dependent type named by a dependently-scoped 3025 /// typename using declaration, e.g. 3026 /// using typename Base<T>::foo; 3027 /// Template instantiation turns these into the underlying type. 3028 class UnresolvedUsingType : public Type { 3029 UnresolvedUsingTypenameDecl *Decl; 3030 3031 UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) 3032 : Type(UnresolvedUsing, QualType(), true, true, false, 3033 /*ContainsUnexpandedParameterPack=*/false), 3034 Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} 3035 friend class ASTContext; // ASTContext creates these. 3036 public: 3037 3038 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 3039 3040 bool isSugared() const { return false; } 3041 QualType desugar() const { return QualType(this, 0); } 3042 3043 static bool classof(const Type *T) { 3044 return T->getTypeClass() == UnresolvedUsing; 3045 } 3046 3047 void Profile(llvm::FoldingSetNodeID &ID) { 3048 return Profile(ID, Decl); 3049 } 3050 static void Profile(llvm::FoldingSetNodeID &ID, 3051 UnresolvedUsingTypenameDecl *D) { 3052 ID.AddPointer(D); 3053 } 3054 }; 3055 3056 3057 class TypedefType : public Type { 3058 TypedefNameDecl *Decl; 3059 protected: 3060 TypedefType(TypeClass tc, const TypedefNameDecl *D, QualType can) 3061 : Type(tc, can, can->isDependentType(), 3062 can->isInstantiationDependentType(), 3063 can->isVariablyModifiedType(), 3064 /*ContainsUnexpandedParameterPack=*/false), 3065 Decl(const_cast<TypedefNameDecl*>(D)) { 3066 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 3067 } 3068 friend class ASTContext; // ASTContext creates these. 3069 public: 3070 3071 TypedefNameDecl *getDecl() const { return Decl; } 3072 3073 bool isSugared() const { return true; } 3074 QualType desugar() const; 3075 3076 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 3077 }; 3078 3079 /// TypeOfExprType (GCC extension). 3080 class TypeOfExprType : public Type { 3081 Expr *TOExpr; 3082 3083 protected: 3084 TypeOfExprType(Expr *E, QualType can = QualType()); 3085 friend class ASTContext; // ASTContext creates these. 3086 public: 3087 Expr *getUnderlyingExpr() const { return TOExpr; } 3088 3089 /// \brief Remove a single level of sugar. 3090 QualType desugar() const; 3091 3092 /// \brief Returns whether this type directly provides sugar. 3093 bool isSugared() const; 3094 3095 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 3096 }; 3097 3098 /// \brief Internal representation of canonical, dependent 3099 /// typeof(expr) types. 3100 /// 3101 /// This class is used internally by the ASTContext to manage 3102 /// canonical, dependent types, only. Clients will only see instances 3103 /// of this class via TypeOfExprType nodes. 3104 class DependentTypeOfExprType 3105 : public TypeOfExprType, public llvm::FoldingSetNode { 3106 const ASTContext &Context; 3107 3108 public: 3109 DependentTypeOfExprType(const ASTContext &Context, Expr *E) 3110 : TypeOfExprType(E), Context(Context) { } 3111 3112 void Profile(llvm::FoldingSetNodeID &ID) { 3113 Profile(ID, Context, getUnderlyingExpr()); 3114 } 3115 3116 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 3117 Expr *E); 3118 }; 3119 3120 /// TypeOfType (GCC extension). 3121 class TypeOfType : public Type { 3122 QualType TOType; 3123 TypeOfType(QualType T, QualType can) 3124 : Type(TypeOf, can, T->isDependentType(), 3125 T->isInstantiationDependentType(), 3126 T->isVariablyModifiedType(), 3127 T->containsUnexpandedParameterPack()), 3128 TOType(T) { 3129 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 3130 } 3131 friend class ASTContext; // ASTContext creates these. 3132 public: 3133 QualType getUnderlyingType() const { return TOType; } 3134 3135 /// \brief Remove a single level of sugar. 3136 QualType desugar() const { return getUnderlyingType(); } 3137 3138 /// \brief Returns whether this type directly provides sugar. 3139 bool isSugared() const { return true; } 3140 3141 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 3142 }; 3143 3144 /// DecltypeType (C++0x) 3145 class DecltypeType : public Type { 3146 Expr *E; 3147 QualType UnderlyingType; 3148 3149 protected: 3150 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 3151 friend class ASTContext; // ASTContext creates these. 3152 public: 3153 Expr *getUnderlyingExpr() const { return E; } 3154 QualType getUnderlyingType() const { return UnderlyingType; } 3155 3156 /// \brief Remove a single level of sugar. 3157 QualType desugar() const; 3158 3159 /// \brief Returns whether this type directly provides sugar. 3160 bool isSugared() const; 3161 3162 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 3163 }; 3164 3165 /// \brief Internal representation of canonical, dependent 3166 /// decltype(expr) types. 3167 /// 3168 /// This class is used internally by the ASTContext to manage 3169 /// canonical, dependent types, only. Clients will only see instances 3170 /// of this class via DecltypeType nodes. 3171 class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 3172 const ASTContext &Context; 3173 3174 public: 3175 DependentDecltypeType(const ASTContext &Context, Expr *E); 3176 3177 void Profile(llvm::FoldingSetNodeID &ID) { 3178 Profile(ID, Context, getUnderlyingExpr()); 3179 } 3180 3181 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 3182 Expr *E); 3183 }; 3184 3185 /// \brief A unary type transform, which is a type constructed from another 3186 class UnaryTransformType : public Type { 3187 public: 3188 enum UTTKind { 3189 EnumUnderlyingType 3190 }; 3191 3192 private: 3193 /// The untransformed type. 3194 QualType BaseType; 3195 /// The transformed type if not dependent, otherwise the same as BaseType. 3196 QualType UnderlyingType; 3197 3198 UTTKind UKind; 3199 protected: 3200 UnaryTransformType(QualType BaseTy, QualType UnderlyingTy, UTTKind UKind, 3201 QualType CanonicalTy); 3202 friend class ASTContext; 3203 public: 3204 bool isSugared() const { return !isDependentType(); } 3205 QualType desugar() const { return UnderlyingType; } 3206 3207 QualType getUnderlyingType() const { return UnderlyingType; } 3208 QualType getBaseType() const { return BaseType; } 3209 3210 UTTKind getUTTKind() const { return UKind; } 3211 3212 static bool classof(const Type *T) { 3213 return T->getTypeClass() == UnaryTransform; 3214 } 3215 }; 3216 3217 class TagType : public Type { 3218 /// Stores the TagDecl associated with this type. The decl may point to any 3219 /// TagDecl that declares the entity. 3220 TagDecl * decl; 3221 3222 friend class ASTReader; 3223 3224 protected: 3225 TagType(TypeClass TC, const TagDecl *D, QualType can); 3226 3227 public: 3228 TagDecl *getDecl() const; 3229 3230 /// @brief Determines whether this type is in the process of being 3231 /// defined. 3232 bool isBeingDefined() const; 3233 3234 static bool classof(const Type *T) { 3235 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 3236 } 3237 }; 3238 3239 /// RecordType - This is a helper class that allows the use of isa/cast/dyncast 3240 /// to detect TagType objects of structs/unions/classes. 3241 class RecordType : public TagType { 3242 protected: 3243 explicit RecordType(const RecordDecl *D) 3244 : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3245 explicit RecordType(TypeClass TC, RecordDecl *D) 3246 : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3247 friend class ASTContext; // ASTContext creates these. 3248 public: 3249 3250 RecordDecl *getDecl() const { 3251 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 3252 } 3253 3254 // FIXME: This predicate is a helper to QualType/Type. It needs to 3255 // recursively check all fields for const-ness. If any field is declared 3256 // const, it needs to return false. 3257 bool hasConstFields() const { return false; } 3258 3259 bool isSugared() const { return false; } 3260 QualType desugar() const { return QualType(this, 0); } 3261 3262 static bool classof(const Type *T) { return T->getTypeClass() == Record; } 3263 }; 3264 3265 /// EnumType - This is a helper class that allows the use of isa/cast/dyncast 3266 /// to detect TagType objects of enums. 3267 class EnumType : public TagType { 3268 explicit EnumType(const EnumDecl *D) 3269 : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3270 friend class ASTContext; // ASTContext creates these. 3271 public: 3272 3273 EnumDecl *getDecl() const { 3274 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 3275 } 3276 3277 bool isSugared() const { return false; } 3278 QualType desugar() const { return QualType(this, 0); } 3279 3280 static bool classof(const Type *T) { return T->getTypeClass() == Enum; } 3281 }; 3282 3283 /// AttributedType - An attributed type is a type to which a type 3284 /// attribute has been applied. The "modified type" is the 3285 /// fully-sugared type to which the attributed type was applied; 3286 /// generally it is not canonically equivalent to the attributed type. 3287 /// The "equivalent type" is the minimally-desugared type which the 3288 /// type is canonically equivalent to. 3289 /// 3290 /// For example, in the following attributed type: 3291 /// int32_t __attribute__((vector_size(16))) 3292 /// - the modified type is the TypedefType for int32_t 3293 /// - the equivalent type is VectorType(16, int32_t) 3294 /// - the canonical type is VectorType(16, int) 3295 class AttributedType : public Type, public llvm::FoldingSetNode { 3296 public: 3297 // It is really silly to have yet another attribute-kind enum, but 3298 // clang::attr::Kind doesn't currently cover the pure type attrs. 3299 enum Kind { 3300 // Expression operand. 3301 attr_address_space, 3302 attr_regparm, 3303 attr_vector_size, 3304 attr_neon_vector_type, 3305 attr_neon_polyvector_type, 3306 3307 FirstExprOperandKind = attr_address_space, 3308 LastExprOperandKind = attr_neon_polyvector_type, 3309 3310 // Enumerated operand (string or keyword). 3311 attr_objc_gc, 3312 attr_objc_ownership, 3313 attr_pcs, 3314 3315 FirstEnumOperandKind = attr_objc_gc, 3316 LastEnumOperandKind = attr_pcs, 3317 3318 // No operand. 3319 attr_noreturn, 3320 attr_cdecl, 3321 attr_fastcall, 3322 attr_stdcall, 3323 attr_thiscall, 3324 attr_pascal, 3325 attr_pnaclcall, 3326 attr_inteloclbicc 3327 }; 3328 3329 private: 3330 QualType ModifiedType; 3331 QualType EquivalentType; 3332 3333 friend class ASTContext; // creates these 3334 3335 AttributedType(QualType canon, Kind attrKind, 3336 QualType modified, QualType equivalent) 3337 : Type(Attributed, canon, canon->isDependentType(), 3338 canon->isInstantiationDependentType(), 3339 canon->isVariablyModifiedType(), 3340 canon->containsUnexpandedParameterPack()), 3341 ModifiedType(modified), EquivalentType(equivalent) { 3342 AttributedTypeBits.AttrKind = attrKind; 3343 } 3344 3345 public: 3346 Kind getAttrKind() const { 3347 return static_cast<Kind>(AttributedTypeBits.AttrKind); 3348 } 3349 3350 QualType getModifiedType() const { return ModifiedType; } 3351 QualType getEquivalentType() const { return EquivalentType; } 3352 3353 bool isSugared() const { return true; } 3354 QualType desugar() const { return getEquivalentType(); } 3355 3356 void Profile(llvm::FoldingSetNodeID &ID) { 3357 Profile(ID, getAttrKind(), ModifiedType, EquivalentType); 3358 } 3359 3360 static void Profile(llvm::FoldingSetNodeID &ID, Kind attrKind, 3361 QualType modified, QualType equivalent) { 3362 ID.AddInteger(attrKind); 3363 ID.AddPointer(modified.getAsOpaquePtr()); 3364 ID.AddPointer(equivalent.getAsOpaquePtr()); 3365 } 3366 3367 static bool classof(const Type *T) { 3368 return T->getTypeClass() == Attributed; 3369 } 3370 }; 3371 3372 class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 3373 // Helper data collector for canonical types. 3374 struct CanonicalTTPTInfo { 3375 unsigned Depth : 15; 3376 unsigned ParameterPack : 1; 3377 unsigned Index : 16; 3378 }; 3379 3380 union { 3381 // Info for the canonical type. 3382 CanonicalTTPTInfo CanTTPTInfo; 3383 // Info for the non-canonical type. 3384 TemplateTypeParmDecl *TTPDecl; 3385 }; 3386 3387 /// Build a non-canonical type. 3388 TemplateTypeParmType(TemplateTypeParmDecl *TTPDecl, QualType Canon) 3389 : Type(TemplateTypeParm, Canon, /*Dependent=*/true, 3390 /*InstantiationDependent=*/true, 3391 /*VariablyModified=*/false, 3392 Canon->containsUnexpandedParameterPack()), 3393 TTPDecl(TTPDecl) { } 3394 3395 /// Build the canonical type. 3396 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 3397 : Type(TemplateTypeParm, QualType(this, 0), 3398 /*Dependent=*/true, 3399 /*InstantiationDependent=*/true, 3400 /*VariablyModified=*/false, PP) { 3401 CanTTPTInfo.Depth = D; 3402 CanTTPTInfo.Index = I; 3403 CanTTPTInfo.ParameterPack = PP; 3404 } 3405 3406 friend class ASTContext; // ASTContext creates these 3407 3408 const CanonicalTTPTInfo& getCanTTPTInfo() const { 3409 QualType Can = getCanonicalTypeInternal(); 3410 return Can->castAs<TemplateTypeParmType>()->CanTTPTInfo; 3411 } 3412 3413 public: 3414 unsigned getDepth() const { return getCanTTPTInfo().Depth; } 3415 unsigned getIndex() const { return getCanTTPTInfo().Index; } 3416 bool isParameterPack() const { return getCanTTPTInfo().ParameterPack; } 3417 3418 TemplateTypeParmDecl *getDecl() const { 3419 return isCanonicalUnqualified() ? 0 : TTPDecl; 3420 } 3421 3422 IdentifierInfo *getIdentifier() const; 3423 3424 bool isSugared() const { return false; } 3425 QualType desugar() const { return QualType(this, 0); } 3426 3427 void Profile(llvm::FoldingSetNodeID &ID) { 3428 Profile(ID, getDepth(), getIndex(), isParameterPack(), getDecl()); 3429 } 3430 3431 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 3432 unsigned Index, bool ParameterPack, 3433 TemplateTypeParmDecl *TTPDecl) { 3434 ID.AddInteger(Depth); 3435 ID.AddInteger(Index); 3436 ID.AddBoolean(ParameterPack); 3437 ID.AddPointer(TTPDecl); 3438 } 3439 3440 static bool classof(const Type *T) { 3441 return T->getTypeClass() == TemplateTypeParm; 3442 } 3443 }; 3444 3445 /// \brief Represents the result of substituting a type for a template 3446 /// type parameter. 3447 /// 3448 /// Within an instantiated template, all template type parameters have 3449 /// been replaced with these. They are used solely to record that a 3450 /// type was originally written as a template type parameter; 3451 /// therefore they are never canonical. 3452 class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 3453 // The original type parameter. 3454 const TemplateTypeParmType *Replaced; 3455 3456 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 3457 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType(), 3458 Canon->isInstantiationDependentType(), 3459 Canon->isVariablyModifiedType(), 3460 Canon->containsUnexpandedParameterPack()), 3461 Replaced(Param) { } 3462 3463 friend class ASTContext; 3464 3465 public: 3466 /// Gets the template parameter that was substituted for. 3467 const TemplateTypeParmType *getReplacedParameter() const { 3468 return Replaced; 3469 } 3470 3471 /// Gets the type that was substituted for the template 3472 /// parameter. 3473 QualType getReplacementType() const { 3474 return getCanonicalTypeInternal(); 3475 } 3476 3477 bool isSugared() const { return true; } 3478 QualType desugar() const { return getReplacementType(); } 3479 3480 void Profile(llvm::FoldingSetNodeID &ID) { 3481 Profile(ID, getReplacedParameter(), getReplacementType()); 3482 } 3483 static void Profile(llvm::FoldingSetNodeID &ID, 3484 const TemplateTypeParmType *Replaced, 3485 QualType Replacement) { 3486 ID.AddPointer(Replaced); 3487 ID.AddPointer(Replacement.getAsOpaquePtr()); 3488 } 3489 3490 static bool classof(const Type *T) { 3491 return T->getTypeClass() == SubstTemplateTypeParm; 3492 } 3493 }; 3494 3495 /// \brief Represents the result of substituting a set of types for a template 3496 /// type parameter pack. 3497 /// 3498 /// When a pack expansion in the source code contains multiple parameter packs 3499 /// and those parameter packs correspond to different levels of template 3500 /// parameter lists, this type node is used to represent a template type 3501 /// parameter pack from an outer level, which has already had its argument pack 3502 /// substituted but that still lives within a pack expansion that itself 3503 /// could not be instantiated. When actually performing a substitution into 3504 /// that pack expansion (e.g., when all template parameters have corresponding 3505 /// arguments), this type will be replaced with the \c SubstTemplateTypeParmType 3506 /// at the current pack substitution index. 3507 class SubstTemplateTypeParmPackType : public Type, public llvm::FoldingSetNode { 3508 /// \brief The original type parameter. 3509 const TemplateTypeParmType *Replaced; 3510 3511 /// \brief A pointer to the set of template arguments that this 3512 /// parameter pack is instantiated with. 3513 const TemplateArgument *Arguments; 3514 3515 /// \brief The number of template arguments in \c Arguments. 3516 unsigned NumArguments; 3517 3518 SubstTemplateTypeParmPackType(const TemplateTypeParmType *Param, 3519 QualType Canon, 3520 const TemplateArgument &ArgPack); 3521 3522 friend class ASTContext; 3523 3524 public: 3525 IdentifierInfo *getIdentifier() const { return Replaced->getIdentifier(); } 3526 3527 /// Gets the template parameter that was substituted for. 3528 const TemplateTypeParmType *getReplacedParameter() const { 3529 return Replaced; 3530 } 3531 3532 bool isSugared() const { return false; } 3533 QualType desugar() const { return QualType(this, 0); } 3534 3535 TemplateArgument getArgumentPack() const; 3536 3537 void Profile(llvm::FoldingSetNodeID &ID); 3538 static void Profile(llvm::FoldingSetNodeID &ID, 3539 const TemplateTypeParmType *Replaced, 3540 const TemplateArgument &ArgPack); 3541 3542 static bool classof(const Type *T) { 3543 return T->getTypeClass() == SubstTemplateTypeParmPack; 3544 } 3545 }; 3546 3547 /// \brief Represents a C++0x auto type. 3548 /// 3549 /// These types are usually a placeholder for a deduced type. However, within 3550 /// templates and before the initializer is attached, there is no deduced type 3551 /// and an auto type is type-dependent and canonical. 3552 class AutoType : public Type, public llvm::FoldingSetNode { 3553 AutoType(QualType DeducedType) 3554 : Type(Auto, DeducedType.isNull() ? QualType(this, 0) : DeducedType, 3555 /*Dependent=*/DeducedType.isNull(), 3556 /*InstantiationDependent=*/DeducedType.isNull(), 3557 /*VariablyModified=*/false, /*ContainsParameterPack=*/false) { 3558 assert((DeducedType.isNull() || !DeducedType->isDependentType()) && 3559 "deduced a dependent type for auto"); 3560 } 3561 3562 friend class ASTContext; // ASTContext creates these 3563 3564 public: 3565 bool isSugared() const { return isDeduced(); } 3566 QualType desugar() const { return getCanonicalTypeInternal(); } 3567 3568 QualType getDeducedType() const { 3569 return isDeduced() ? getCanonicalTypeInternal() : QualType(); 3570 } 3571 bool isDeduced() const { 3572 return !isDependentType(); 3573 } 3574 3575 void Profile(llvm::FoldingSetNodeID &ID) { 3576 Profile(ID, getDeducedType()); 3577 } 3578 3579 static void Profile(llvm::FoldingSetNodeID &ID, 3580 QualType Deduced) { 3581 ID.AddPointer(Deduced.getAsOpaquePtr()); 3582 } 3583 3584 static bool classof(const Type *T) { 3585 return T->getTypeClass() == Auto; 3586 } 3587 }; 3588 3589 /// \brief Represents a type template specialization; the template 3590 /// must be a class template, a type alias template, or a template 3591 /// template parameter. A template which cannot be resolved to one of 3592 /// these, e.g. because it is written with a dependent scope 3593 /// specifier, is instead represented as a 3594 /// @c DependentTemplateSpecializationType. 3595 /// 3596 /// A non-dependent template specialization type is always "sugar", 3597 /// typically for a @c RecordType. For example, a class template 3598 /// specialization type of @c vector<int> will refer to a tag type for 3599 /// the instantiation @c std::vector<int, std::allocator<int>> 3600 /// 3601 /// Template specializations are dependent if either the template or 3602 /// any of the template arguments are dependent, in which case the 3603 /// type may also be canonical. 3604 /// 3605 /// Instances of this type are allocated with a trailing array of 3606 /// TemplateArguments, followed by a QualType representing the 3607 /// non-canonical aliased type when the template is a type alias 3608 /// template. 3609 class TemplateSpecializationType 3610 : public Type, public llvm::FoldingSetNode { 3611 /// \brief The name of the template being specialized. This is 3612 /// either a TemplateName::Template (in which case it is a 3613 /// ClassTemplateDecl*, a TemplateTemplateParmDecl*, or a 3614 /// TypeAliasTemplateDecl*), a 3615 /// TemplateName::SubstTemplateTemplateParmPack, or a 3616 /// TemplateName::SubstTemplateTemplateParm (in which case the 3617 /// replacement must, recursively, be one of these). 3618 TemplateName Template; 3619 3620 /// \brief - The number of template arguments named in this class 3621 /// template specialization. 3622 unsigned NumArgs : 31; 3623 3624 /// \brief Whether this template specialization type is a substituted 3625 /// type alias. 3626 bool TypeAlias : 1; 3627 3628 TemplateSpecializationType(TemplateName T, 3629 const TemplateArgument *Args, 3630 unsigned NumArgs, QualType Canon, 3631 QualType Aliased); 3632 3633 friend class ASTContext; // ASTContext creates these 3634 3635 public: 3636 /// \brief Determine whether any of the given template arguments are 3637 /// dependent. 3638 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 3639 unsigned NumArgs, 3640 bool &InstantiationDependent); 3641 3642 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 3643 unsigned NumArgs, 3644 bool &InstantiationDependent); 3645 3646 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &, 3647 bool &InstantiationDependent); 3648 3649 /// \brief Print a template argument list, including the '<' and '>' 3650 /// enclosing the template arguments. 3651 static void PrintTemplateArgumentList(raw_ostream &OS, 3652 const TemplateArgument *Args, 3653 unsigned NumArgs, 3654 const PrintingPolicy &Policy, 3655 bool SkipBrackets = false); 3656 3657 static void PrintTemplateArgumentList(raw_ostream &OS, 3658 const TemplateArgumentLoc *Args, 3659 unsigned NumArgs, 3660 const PrintingPolicy &Policy); 3661 3662 static void PrintTemplateArgumentList(raw_ostream &OS, 3663 const TemplateArgumentListInfo &, 3664 const PrintingPolicy &Policy); 3665 3666 /// True if this template specialization type matches a current 3667 /// instantiation in the context in which it is found. 3668 bool isCurrentInstantiation() const { 3669 return isa<InjectedClassNameType>(getCanonicalTypeInternal()); 3670 } 3671 3672 /// \brief Determine if this template specialization type is for a type alias 3673 /// template that has been substituted. 3674 /// 3675 /// Nearly every template specialization type whose template is an alias 3676 /// template will be substituted. However, this is not the case when 3677 /// the specialization contains a pack expansion but the template alias 3678 /// does not have a corresponding parameter pack, e.g., 3679 /// 3680 /// \code 3681 /// template<typename T, typename U, typename V> struct S; 3682 /// template<typename T, typename U> using A = S<T, int, U>; 3683 /// template<typename... Ts> struct X { 3684 /// typedef A<Ts...> type; // not a type alias 3685 /// }; 3686 /// \endcode 3687 bool isTypeAlias() const { return TypeAlias; } 3688 3689 /// Get the aliased type, if this is a specialization of a type alias 3690 /// template. 3691 QualType getAliasedType() const { 3692 assert(isTypeAlias() && "not a type alias template specialization"); 3693 return *reinterpret_cast<const QualType*>(end()); 3694 } 3695 3696 typedef const TemplateArgument * iterator; 3697 3698 iterator begin() const { return getArgs(); } 3699 iterator end() const; // defined inline in TemplateBase.h 3700 3701 /// \brief Retrieve the name of the template that we are specializing. 3702 TemplateName getTemplateName() const { return Template; } 3703 3704 /// \brief Retrieve the template arguments. 3705 const TemplateArgument *getArgs() const { 3706 return reinterpret_cast<const TemplateArgument *>(this + 1); 3707 } 3708 3709 /// \brief Retrieve the number of template arguments. 3710 unsigned getNumArgs() const { return NumArgs; } 3711 3712 /// \brief Retrieve a specific template argument as a type. 3713 /// \pre @c isArgType(Arg) 3714 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 3715 3716 bool isSugared() const { 3717 return !isDependentType() || isCurrentInstantiation() || isTypeAlias(); 3718 } 3719 QualType desugar() const { return getCanonicalTypeInternal(); } 3720 3721 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) { 3722 Profile(ID, Template, getArgs(), NumArgs, Ctx); 3723 if (isTypeAlias()) 3724 getAliasedType().Profile(ID); 3725 } 3726 3727 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 3728 const TemplateArgument *Args, 3729 unsigned NumArgs, 3730 const ASTContext &Context); 3731 3732 static bool classof(const Type *T) { 3733 return T->getTypeClass() == TemplateSpecialization; 3734 } 3735 }; 3736 3737 /// \brief The injected class name of a C++ class template or class 3738 /// template partial specialization. Used to record that a type was 3739 /// spelled with a bare identifier rather than as a template-id; the 3740 /// equivalent for non-templated classes is just RecordType. 3741 /// 3742 /// Injected class name types are always dependent. Template 3743 /// instantiation turns these into RecordTypes. 3744 /// 3745 /// Injected class name types are always canonical. This works 3746 /// because it is impossible to compare an injected class name type 3747 /// with the corresponding non-injected template type, for the same 3748 /// reason that it is impossible to directly compare template 3749 /// parameters from different dependent contexts: injected class name 3750 /// types can only occur within the scope of a particular templated 3751 /// declaration, and within that scope every template specialization 3752 /// will canonicalize to the injected class name (when appropriate 3753 /// according to the rules of the language). 3754 class InjectedClassNameType : public Type { 3755 CXXRecordDecl *Decl; 3756 3757 /// The template specialization which this type represents. 3758 /// For example, in 3759 /// template <class T> class A { ... }; 3760 /// this is A<T>, whereas in 3761 /// template <class X, class Y> class A<B<X,Y> > { ... }; 3762 /// this is A<B<X,Y> >. 3763 /// 3764 /// It is always unqualified, always a template specialization type, 3765 /// and always dependent. 3766 QualType InjectedType; 3767 3768 friend class ASTContext; // ASTContext creates these. 3769 friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not 3770 // currently suitable for AST reading, too much 3771 // interdependencies. 3772 InjectedClassNameType(CXXRecordDecl *D, QualType TST) 3773 : Type(InjectedClassName, QualType(), /*Dependent=*/true, 3774 /*InstantiationDependent=*/true, 3775 /*VariablyModified=*/false, 3776 /*ContainsUnexpandedParameterPack=*/false), 3777 Decl(D), InjectedType(TST) { 3778 assert(isa<TemplateSpecializationType>(TST)); 3779 assert(!TST.hasQualifiers()); 3780 assert(TST->isDependentType()); 3781 } 3782 3783 public: 3784 QualType getInjectedSpecializationType() const { return InjectedType; } 3785 const TemplateSpecializationType *getInjectedTST() const { 3786 return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); 3787 } 3788 3789 CXXRecordDecl *getDecl() const; 3790 3791 bool isSugared() const { return false; } 3792 QualType desugar() const { return QualType(this, 0); } 3793 3794 static bool classof(const Type *T) { 3795 return T->getTypeClass() == InjectedClassName; 3796 } 3797 }; 3798 3799 /// \brief The kind of a tag type. 3800 enum TagTypeKind { 3801 /// \brief The "struct" keyword. 3802 TTK_Struct, 3803 /// \brief The "__interface" keyword. 3804 TTK_Interface, 3805 /// \brief The "union" keyword. 3806 TTK_Union, 3807 /// \brief The "class" keyword. 3808 TTK_Class, 3809 /// \brief The "enum" keyword. 3810 TTK_Enum 3811 }; 3812 3813 /// \brief The elaboration keyword that precedes a qualified type name or 3814 /// introduces an elaborated-type-specifier. 3815 enum ElaboratedTypeKeyword { 3816 /// \brief The "struct" keyword introduces the elaborated-type-specifier. 3817 ETK_Struct, 3818 /// \brief The "__interface" keyword introduces the elaborated-type-specifier. 3819 ETK_Interface, 3820 /// \brief The "union" keyword introduces the elaborated-type-specifier. 3821 ETK_Union, 3822 /// \brief The "class" keyword introduces the elaborated-type-specifier. 3823 ETK_Class, 3824 /// \brief The "enum" keyword introduces the elaborated-type-specifier. 3825 ETK_Enum, 3826 /// \brief The "typename" keyword precedes the qualified type name, e.g., 3827 /// \c typename T::type. 3828 ETK_Typename, 3829 /// \brief No keyword precedes the qualified type name. 3830 ETK_None 3831 }; 3832 3833 /// A helper class for Type nodes having an ElaboratedTypeKeyword. 3834 /// The keyword in stored in the free bits of the base class. 3835 /// Also provides a few static helpers for converting and printing 3836 /// elaborated type keyword and tag type kind enumerations. 3837 class TypeWithKeyword : public Type { 3838 protected: 3839 TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, 3840 QualType Canonical, bool Dependent, 3841 bool InstantiationDependent, bool VariablyModified, 3842 bool ContainsUnexpandedParameterPack) 3843 : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified, 3844 ContainsUnexpandedParameterPack) { 3845 TypeWithKeywordBits.Keyword = Keyword; 3846 } 3847 3848 public: 3849 ElaboratedTypeKeyword getKeyword() const { 3850 return static_cast<ElaboratedTypeKeyword>(TypeWithKeywordBits.Keyword); 3851 } 3852 3853 /// getKeywordForTypeSpec - Converts a type specifier (DeclSpec::TST) 3854 /// into an elaborated type keyword. 3855 static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); 3856 3857 /// getTagTypeKindForTypeSpec - Converts a type specifier (DeclSpec::TST) 3858 /// into a tag type kind. It is an error to provide a type specifier 3859 /// which *isn't* a tag kind here. 3860 static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); 3861 3862 /// getKeywordForTagDeclKind - Converts a TagTypeKind into an 3863 /// elaborated type keyword. 3864 static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); 3865 3866 /// getTagTypeKindForKeyword - Converts an elaborated type keyword into 3867 // a TagTypeKind. It is an error to provide an elaborated type keyword 3868 /// which *isn't* a tag kind here. 3869 static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); 3870 3871 static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); 3872 3873 static const char *getKeywordName(ElaboratedTypeKeyword Keyword); 3874 3875 static const char *getTagTypeKindName(TagTypeKind Kind) { 3876 return getKeywordName(getKeywordForTagTypeKind(Kind)); 3877 } 3878 3879 class CannotCastToThisType {}; 3880 static CannotCastToThisType classof(const Type *); 3881 }; 3882 3883 /// \brief Represents a type that was referred to using an elaborated type 3884 /// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, 3885 /// or both. 3886 /// 3887 /// This type is used to keep track of a type name as written in the 3888 /// source code, including tag keywords and any nested-name-specifiers. 3889 /// The type itself is always "sugar", used to express what was written 3890 /// in the source code but containing no additional semantic information. 3891 class ElaboratedType : public TypeWithKeyword, public llvm::FoldingSetNode { 3892 3893 /// \brief The nested name specifier containing the qualifier. 3894 NestedNameSpecifier *NNS; 3895 3896 /// \brief The type that this qualified name refers to. 3897 QualType NamedType; 3898 3899 ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3900 QualType NamedType, QualType CanonType) 3901 : TypeWithKeyword(Keyword, Elaborated, CanonType, 3902 NamedType->isDependentType(), 3903 NamedType->isInstantiationDependentType(), 3904 NamedType->isVariablyModifiedType(), 3905 NamedType->containsUnexpandedParameterPack()), 3906 NNS(NNS), NamedType(NamedType) { 3907 assert(!(Keyword == ETK_None && NNS == 0) && 3908 "ElaboratedType cannot have elaborated type keyword " 3909 "and name qualifier both null."); 3910 } 3911 3912 friend class ASTContext; // ASTContext creates these 3913 3914 public: 3915 ~ElaboratedType(); 3916 3917 /// \brief Retrieve the qualification on this type. 3918 NestedNameSpecifier *getQualifier() const { return NNS; } 3919 3920 /// \brief Retrieve the type named by the qualified-id. 3921 QualType getNamedType() const { return NamedType; } 3922 3923 /// \brief Remove a single level of sugar. 3924 QualType desugar() const { return getNamedType(); } 3925 3926 /// \brief Returns whether this type directly provides sugar. 3927 bool isSugared() const { return true; } 3928 3929 void Profile(llvm::FoldingSetNodeID &ID) { 3930 Profile(ID, getKeyword(), NNS, NamedType); 3931 } 3932 3933 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3934 NestedNameSpecifier *NNS, QualType NamedType) { 3935 ID.AddInteger(Keyword); 3936 ID.AddPointer(NNS); 3937 NamedType.Profile(ID); 3938 } 3939 3940 static bool classof(const Type *T) { 3941 return T->getTypeClass() == Elaborated; 3942 } 3943 }; 3944 3945 /// \brief Represents a qualified type name for which the type name is 3946 /// dependent. 3947 /// 3948 /// DependentNameType represents a class of dependent types that involve a 3949 /// dependent nested-name-specifier (e.g., "T::") followed by a (dependent) 3950 /// name of a type. The DependentNameType may start with a "typename" (for a 3951 /// typename-specifier), "class", "struct", "union", or "enum" (for a 3952 /// dependent elaborated-type-specifier), or nothing (in contexts where we 3953 /// know that we must be referring to a type, e.g., in a base class specifier). 3954 class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { 3955 3956 /// \brief The nested name specifier containing the qualifier. 3957 NestedNameSpecifier *NNS; 3958 3959 /// \brief The type that this typename specifier refers to. 3960 const IdentifierInfo *Name; 3961 3962 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3963 const IdentifierInfo *Name, QualType CanonType) 3964 : TypeWithKeyword(Keyword, DependentName, CanonType, /*Dependent=*/true, 3965 /*InstantiationDependent=*/true, 3966 /*VariablyModified=*/false, 3967 NNS->containsUnexpandedParameterPack()), 3968 NNS(NNS), Name(Name) { 3969 assert(NNS->isDependent() && 3970 "DependentNameType requires a dependent nested-name-specifier"); 3971 } 3972 3973 friend class ASTContext; // ASTContext creates these 3974 3975 public: 3976 /// \brief Retrieve the qualification on this type. 3977 NestedNameSpecifier *getQualifier() const { return NNS; } 3978 3979 /// \brief Retrieve the type named by the typename specifier as an 3980 /// identifier. 3981 /// 3982 /// This routine will return a non-NULL identifier pointer when the 3983 /// form of the original typename was terminated by an identifier, 3984 /// e.g., "typename T::type". 3985 const IdentifierInfo *getIdentifier() const { 3986 return Name; 3987 } 3988 3989 bool isSugared() const { return false; } 3990 QualType desugar() const { return QualType(this, 0); } 3991 3992 void Profile(llvm::FoldingSetNodeID &ID) { 3993 Profile(ID, getKeyword(), NNS, Name); 3994 } 3995 3996 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3997 NestedNameSpecifier *NNS, const IdentifierInfo *Name) { 3998 ID.AddInteger(Keyword); 3999 ID.AddPointer(NNS); 4000 ID.AddPointer(Name); 4001 } 4002 4003 static bool classof(const Type *T) { 4004 return T->getTypeClass() == DependentName; 4005 } 4006 }; 4007 4008 /// DependentTemplateSpecializationType - Represents a template 4009 /// specialization type whose template cannot be resolved, e.g. 4010 /// A<T>::template B<T> 4011 class DependentTemplateSpecializationType : 4012 public TypeWithKeyword, public llvm::FoldingSetNode { 4013 4014 /// \brief The nested name specifier containing the qualifier. 4015 NestedNameSpecifier *NNS; 4016 4017 /// \brief The identifier of the template. 4018 const IdentifierInfo *Name; 4019 4020 /// \brief - The number of template arguments named in this class 4021 /// template specialization. 4022 unsigned NumArgs; 4023 4024 const TemplateArgument *getArgBuffer() const { 4025 return reinterpret_cast<const TemplateArgument*>(this+1); 4026 } 4027 TemplateArgument *getArgBuffer() { 4028 return reinterpret_cast<TemplateArgument*>(this+1); 4029 } 4030 4031 DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 4032 NestedNameSpecifier *NNS, 4033 const IdentifierInfo *Name, 4034 unsigned NumArgs, 4035 const TemplateArgument *Args, 4036 QualType Canon); 4037 4038 friend class ASTContext; // ASTContext creates these 4039 4040 public: 4041 NestedNameSpecifier *getQualifier() const { return NNS; } 4042 const IdentifierInfo *getIdentifier() const { return Name; } 4043 4044 /// \brief Retrieve the template arguments. 4045 const TemplateArgument *getArgs() const { 4046 return getArgBuffer(); 4047 } 4048 4049 /// \brief Retrieve the number of template arguments. 4050 unsigned getNumArgs() const { return NumArgs; } 4051 4052 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 4053 4054 typedef const TemplateArgument * iterator; 4055 iterator begin() const { return getArgs(); } 4056 iterator end() const; // inline in TemplateBase.h 4057 4058 bool isSugared() const { return false; } 4059 QualType desugar() const { return QualType(this, 0); } 4060 4061 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) { 4062 Profile(ID, Context, getKeyword(), NNS, Name, NumArgs, getArgs()); 4063 } 4064 4065 static void Profile(llvm::FoldingSetNodeID &ID, 4066 const ASTContext &Context, 4067 ElaboratedTypeKeyword Keyword, 4068 NestedNameSpecifier *Qualifier, 4069 const IdentifierInfo *Name, 4070 unsigned NumArgs, 4071 const TemplateArgument *Args); 4072 4073 static bool classof(const Type *T) { 4074 return T->getTypeClass() == DependentTemplateSpecialization; 4075 } 4076 }; 4077 4078 /// \brief Represents a pack expansion of types. 4079 /// 4080 /// Pack expansions are part of C++0x variadic templates. A pack 4081 /// expansion contains a pattern, which itself contains one or more 4082 /// "unexpanded" parameter packs. When instantiated, a pack expansion 4083 /// produces a series of types, each instantiated from the pattern of 4084 /// the expansion, where the Ith instantiation of the pattern uses the 4085 /// Ith arguments bound to each of the unexpanded parameter packs. The 4086 /// pack expansion is considered to "expand" these unexpanded 4087 /// parameter packs. 4088 /// 4089 /// \code 4090 /// template<typename ...Types> struct tuple; 4091 /// 4092 /// template<typename ...Types> 4093 /// struct tuple_of_references { 4094 /// typedef tuple<Types&...> type; 4095 /// }; 4096 /// \endcode 4097 /// 4098 /// Here, the pack expansion \c Types&... is represented via a 4099 /// PackExpansionType whose pattern is Types&. 4100 class PackExpansionType : public Type, public llvm::FoldingSetNode { 4101 /// \brief The pattern of the pack expansion. 4102 QualType Pattern; 4103 4104 /// \brief The number of expansions that this pack expansion will 4105 /// generate when substituted (+1), or indicates that 4106 /// 4107 /// This field will only have a non-zero value when some of the parameter 4108 /// packs that occur within the pattern have been substituted but others have 4109 /// not. 4110 unsigned NumExpansions; 4111 4112 PackExpansionType(QualType Pattern, QualType Canon, 4113 Optional<unsigned> NumExpansions) 4114 : Type(PackExpansion, Canon, /*Dependent=*/Pattern->isDependentType(), 4115 /*InstantiationDependent=*/true, 4116 /*VariableModified=*/Pattern->isVariablyModifiedType(), 4117 /*ContainsUnexpandedParameterPack=*/false), 4118 Pattern(Pattern), 4119 NumExpansions(NumExpansions? *NumExpansions + 1: 0) { } 4120 4121 friend class ASTContext; // ASTContext creates these 4122 4123 public: 4124 /// \brief Retrieve the pattern of this pack expansion, which is the 4125 /// type that will be repeatedly instantiated when instantiating the 4126 /// pack expansion itself. 4127 QualType getPattern() const { return Pattern; } 4128 4129 /// \brief Retrieve the number of expansions that this pack expansion will 4130 /// generate, if known. 4131 Optional<unsigned> getNumExpansions() const { 4132 if (NumExpansions) 4133 return NumExpansions - 1; 4134 4135 return None; 4136 } 4137 4138 bool isSugared() const { return false; } 4139 QualType desugar() const { return QualType(this, 0); } 4140 4141 void Profile(llvm::FoldingSetNodeID &ID) { 4142 Profile(ID, getPattern(), getNumExpansions()); 4143 } 4144 4145 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pattern, 4146 Optional<unsigned> NumExpansions) { 4147 ID.AddPointer(Pattern.getAsOpaquePtr()); 4148 ID.AddBoolean(NumExpansions.hasValue()); 4149 if (NumExpansions) 4150 ID.AddInteger(*NumExpansions); 4151 } 4152 4153 static bool classof(const Type *T) { 4154 return T->getTypeClass() == PackExpansion; 4155 } 4156 }; 4157 4158 /// ObjCObjectType - Represents a class type in Objective C. 4159 /// Every Objective C type is a combination of a base type and a 4160 /// list of protocols. 4161 /// 4162 /// Given the following declarations: 4163 /// \code 4164 /// \@class C; 4165 /// \@protocol P; 4166 /// \endcode 4167 /// 4168 /// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType 4169 /// with base C and no protocols. 4170 /// 4171 /// 'C<P>' is an ObjCObjectType with base C and protocol list [P]. 4172 /// 4173 /// 'id' is a TypedefType which is sugar for an ObjCPointerType whose 4174 /// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType 4175 /// and no protocols. 4176 /// 4177 /// 'id<P>' is an ObjCPointerType whose pointee is an ObjCObjecType 4178 /// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually 4179 /// this should get its own sugar class to better represent the source. 4180 class ObjCObjectType : public Type { 4181 // ObjCObjectType.NumProtocols - the number of protocols stored 4182 // after the ObjCObjectPointerType node. 4183 // 4184 // These protocols are those written directly on the type. If 4185 // protocol qualifiers ever become additive, the iterators will need 4186 // to get kindof complicated. 4187 // 4188 // In the canonical object type, these are sorted alphabetically 4189 // and uniqued. 4190 4191 /// Either a BuiltinType or an InterfaceType or sugar for either. 4192 QualType BaseType; 4193 4194 ObjCProtocolDecl * const *getProtocolStorage() const { 4195 return const_cast<ObjCObjectType*>(this)->getProtocolStorage(); 4196 } 4197 4198 ObjCProtocolDecl **getProtocolStorage(); 4199 4200 protected: 4201 ObjCObjectType(QualType Canonical, QualType Base, 4202 ObjCProtocolDecl * const *Protocols, unsigned NumProtocols); 4203 4204 enum Nonce_ObjCInterface { Nonce_ObjCInterface }; 4205 ObjCObjectType(enum Nonce_ObjCInterface) 4206 : Type(ObjCInterface, QualType(), false, false, false, false), 4207 BaseType(QualType(this_(), 0)) { 4208 ObjCObjectTypeBits.NumProtocols = 0; 4209 } 4210 4211 public: 4212 /// getBaseType - Gets the base type of this object type. This is 4213 /// always (possibly sugar for) one of: 4214 /// - the 'id' builtin type (as opposed to the 'id' type visible to the 4215 /// user, which is a typedef for an ObjCPointerType) 4216 /// - the 'Class' builtin type (same caveat) 4217 /// - an ObjCObjectType (currently always an ObjCInterfaceType) 4218 QualType getBaseType() const { return BaseType; } 4219 4220 bool isObjCId() const { 4221 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); 4222 } 4223 bool isObjCClass() const { 4224 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); 4225 } 4226 bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } 4227 bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } 4228 bool isObjCUnqualifiedIdOrClass() const { 4229 if (!qual_empty()) return false; 4230 if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) 4231 return T->getKind() == BuiltinType::ObjCId || 4232 T->getKind() == BuiltinType::ObjCClass; 4233 return false; 4234 } 4235 bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } 4236 bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } 4237 4238 /// Gets the interface declaration for this object type, if the base type 4239 /// really is an interface. 4240 ObjCInterfaceDecl *getInterface() const; 4241 4242 typedef ObjCProtocolDecl * const *qual_iterator; 4243 4244 qual_iterator qual_begin() const { return getProtocolStorage(); } 4245 qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } 4246 4247 bool qual_empty() const { return getNumProtocols() == 0; } 4248 4249 /// getNumProtocols - Return the number of qualifying protocols in this 4250 /// interface type, or 0 if there are none. 4251 unsigned getNumProtocols() const { return ObjCObjectTypeBits.NumProtocols; } 4252 4253 /// \brief Fetch a protocol by index. 4254 ObjCProtocolDecl *getProtocol(unsigned I) const { 4255 assert(I < getNumProtocols() && "Out-of-range protocol access"); 4256 return qual_begin()[I]; 4257 } 4258 4259 bool isSugared() const { return false; } 4260 QualType desugar() const { return QualType(this, 0); } 4261 4262 static bool classof(const Type *T) { 4263 return T->getTypeClass() == ObjCObject || 4264 T->getTypeClass() == ObjCInterface; 4265 } 4266 }; 4267 4268 /// ObjCObjectTypeImpl - A class providing a concrete implementation 4269 /// of ObjCObjectType, so as to not increase the footprint of 4270 /// ObjCInterfaceType. Code outside of ASTContext and the core type 4271 /// system should not reference this type. 4272 class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { 4273 friend class ASTContext; 4274 4275 // If anyone adds fields here, ObjCObjectType::getProtocolStorage() 4276 // will need to be modified. 4277 4278 ObjCObjectTypeImpl(QualType Canonical, QualType Base, 4279 ObjCProtocolDecl * const *Protocols, 4280 unsigned NumProtocols) 4281 : ObjCObjectType(Canonical, Base, Protocols, NumProtocols) {} 4282 4283 public: 4284 void Profile(llvm::FoldingSetNodeID &ID); 4285 static void Profile(llvm::FoldingSetNodeID &ID, 4286 QualType Base, 4287 ObjCProtocolDecl *const *protocols, 4288 unsigned NumProtocols); 4289 }; 4290 4291 inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorage() { 4292 return reinterpret_cast<ObjCProtocolDecl**>( 4293 static_cast<ObjCObjectTypeImpl*>(this) + 1); 4294 } 4295 4296 /// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 4297 /// object oriented design. They basically correspond to C++ classes. There 4298 /// are two kinds of interface types, normal interfaces like "NSString" and 4299 /// qualified interfaces, which are qualified with a protocol list like 4300 /// "NSString<NSCopyable, NSAmazing>". 4301 /// 4302 /// ObjCInterfaceType guarantees the following properties when considered 4303 /// as a subtype of its superclass, ObjCObjectType: 4304 /// - There are no protocol qualifiers. To reinforce this, code which 4305 /// tries to invoke the protocol methods via an ObjCInterfaceType will 4306 /// fail to compile. 4307 /// - It is its own base type. That is, if T is an ObjCInterfaceType*, 4308 /// T->getBaseType() == QualType(T, 0). 4309 class ObjCInterfaceType : public ObjCObjectType { 4310 mutable ObjCInterfaceDecl *Decl; 4311 4312 ObjCInterfaceType(const ObjCInterfaceDecl *D) 4313 : ObjCObjectType(Nonce_ObjCInterface), 4314 Decl(const_cast<ObjCInterfaceDecl*>(D)) {} 4315 friend class ASTContext; // ASTContext creates these. 4316 friend class ASTReader; 4317 friend class ObjCInterfaceDecl; 4318 4319 public: 4320 /// getDecl - Get the declaration of this interface. 4321 ObjCInterfaceDecl *getDecl() const { return Decl; } 4322 4323 bool isSugared() const { return false; } 4324 QualType desugar() const { return QualType(this, 0); } 4325 4326 static bool classof(const Type *T) { 4327 return T->getTypeClass() == ObjCInterface; 4328 } 4329 4330 // Nonsense to "hide" certain members of ObjCObjectType within this 4331 // class. People asking for protocols on an ObjCInterfaceType are 4332 // not going to get what they want: ObjCInterfaceTypes are 4333 // guaranteed to have no protocols. 4334 enum { 4335 qual_iterator, 4336 qual_begin, 4337 qual_end, 4338 getNumProtocols, 4339 getProtocol 4340 }; 4341 }; 4342 4343 inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { 4344 if (const ObjCInterfaceType *T = 4345 getBaseType()->getAs<ObjCInterfaceType>()) 4346 return T->getDecl(); 4347 return 0; 4348 } 4349 4350 /// ObjCObjectPointerType - Used to represent a pointer to an 4351 /// Objective C object. These are constructed from pointer 4352 /// declarators when the pointee type is an ObjCObjectType (or sugar 4353 /// for one). In addition, the 'id' and 'Class' types are typedefs 4354 /// for these, and the protocol-qualified types 'id<P>' and 'Class<P>' 4355 /// are translated into these. 4356 /// 4357 /// Pointers to pointers to Objective C objects are still PointerTypes; 4358 /// only the first level of pointer gets it own type implementation. 4359 class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 4360 QualType PointeeType; 4361 4362 ObjCObjectPointerType(QualType Canonical, QualType Pointee) 4363 : Type(ObjCObjectPointer, Canonical, false, false, false, false), 4364 PointeeType(Pointee) {} 4365 friend class ASTContext; // ASTContext creates these. 4366 4367 public: 4368 /// getPointeeType - Gets the type pointed to by this ObjC pointer. 4369 /// The result will always be an ObjCObjectType or sugar thereof. 4370 QualType getPointeeType() const { return PointeeType; } 4371 4372 /// getObjCObjectType - Gets the type pointed to by this ObjC 4373 /// pointer. This method always returns non-null. 4374 /// 4375 /// This method is equivalent to getPointeeType() except that 4376 /// it discards any typedefs (or other sugar) between this 4377 /// type and the "outermost" object type. So for: 4378 /// \code 4379 /// \@class A; \@protocol P; \@protocol Q; 4380 /// typedef A<P> AP; 4381 /// typedef A A1; 4382 /// typedef A1<P> A1P; 4383 /// typedef A1P<Q> A1PQ; 4384 /// \endcode 4385 /// For 'A*', getObjectType() will return 'A'. 4386 /// For 'A<P>*', getObjectType() will return 'A<P>'. 4387 /// For 'AP*', getObjectType() will return 'A<P>'. 4388 /// For 'A1*', getObjectType() will return 'A'. 4389 /// For 'A1<P>*', getObjectType() will return 'A1<P>'. 4390 /// For 'A1P*', getObjectType() will return 'A1<P>'. 4391 /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because 4392 /// adding protocols to a protocol-qualified base discards the 4393 /// old qualifiers (for now). But if it didn't, getObjectType() 4394 /// would return 'A1P<Q>' (and we'd have to make iterating over 4395 /// qualifiers more complicated). 4396 const ObjCObjectType *getObjectType() const { 4397 return PointeeType->castAs<ObjCObjectType>(); 4398 } 4399 4400 /// getInterfaceType - If this pointer points to an Objective C 4401 /// \@interface type, gets the type for that interface. Any protocol 4402 /// qualifiers on the interface are ignored. 4403 /// 4404 /// \return null if the base type for this pointer is 'id' or 'Class' 4405 const ObjCInterfaceType *getInterfaceType() const { 4406 return getObjectType()->getBaseType()->getAs<ObjCInterfaceType>(); 4407 } 4408 4409 /// getInterfaceDecl - If this pointer points to an Objective \@interface 4410 /// type, gets the declaration for that interface. 4411 /// 4412 /// \return null if the base type for this pointer is 'id' or 'Class' 4413 ObjCInterfaceDecl *getInterfaceDecl() const { 4414 return getObjectType()->getInterface(); 4415 } 4416 4417 /// isObjCIdType - True if this is equivalent to the 'id' type, i.e. if 4418 /// its object type is the primitive 'id' type with no protocols. 4419 bool isObjCIdType() const { 4420 return getObjectType()->isObjCUnqualifiedId(); 4421 } 4422 4423 /// isObjCClassType - True if this is equivalent to the 'Class' type, 4424 /// i.e. if its object tive is the primitive 'Class' type with no protocols. 4425 bool isObjCClassType() const { 4426 return getObjectType()->isObjCUnqualifiedClass(); 4427 } 4428 4429 /// isObjCQualifiedIdType - True if this is equivalent to 'id<P>' for some 4430 /// non-empty set of protocols. 4431 bool isObjCQualifiedIdType() const { 4432 return getObjectType()->isObjCQualifiedId(); 4433 } 4434 4435 /// isObjCQualifiedClassType - True if this is equivalent to 'Class<P>' for 4436 /// some non-empty set of protocols. 4437 bool isObjCQualifiedClassType() const { 4438 return getObjectType()->isObjCQualifiedClass(); 4439 } 4440 4441 /// An iterator over the qualifiers on the object type. Provided 4442 /// for convenience. This will always iterate over the full set of 4443 /// protocols on a type, not just those provided directly. 4444 typedef ObjCObjectType::qual_iterator qual_iterator; 4445 4446 qual_iterator qual_begin() const { 4447 return getObjectType()->qual_begin(); 4448 } 4449 qual_iterator qual_end() const { 4450 return getObjectType()->qual_end(); 4451 } 4452 bool qual_empty() const { return getObjectType()->qual_empty(); } 4453 4454 /// getNumProtocols - Return the number of qualifying protocols on 4455 /// the object type. 4456 unsigned getNumProtocols() const { 4457 return getObjectType()->getNumProtocols(); 4458 } 4459 4460 /// \brief Retrieve a qualifying protocol by index on the object 4461 /// type. 4462 ObjCProtocolDecl *getProtocol(unsigned I) const { 4463 return getObjectType()->getProtocol(I); 4464 } 4465 4466 bool isSugared() const { return false; } 4467 QualType desugar() const { return QualType(this, 0); } 4468 4469 void Profile(llvm::FoldingSetNodeID &ID) { 4470 Profile(ID, getPointeeType()); 4471 } 4472 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 4473 ID.AddPointer(T.getAsOpaquePtr()); 4474 } 4475 static bool classof(const Type *T) { 4476 return T->getTypeClass() == ObjCObjectPointer; 4477 } 4478 }; 4479 4480 class AtomicType : public Type, public llvm::FoldingSetNode { 4481 QualType ValueType; 4482 4483 AtomicType(QualType ValTy, QualType Canonical) 4484 : Type(Atomic, Canonical, ValTy->isDependentType(), 4485 ValTy->isInstantiationDependentType(), 4486 ValTy->isVariablyModifiedType(), 4487 ValTy->containsUnexpandedParameterPack()), 4488 ValueType(ValTy) {} 4489 friend class ASTContext; // ASTContext creates these. 4490 4491 public: 4492 /// getValueType - Gets the type contained by this atomic type, i.e. 4493 /// the type returned by performing an atomic load of this atomic type. 4494 QualType getValueType() const { return ValueType; } 4495 4496 bool isSugared() const { return false; } 4497 QualType desugar() const { return QualType(this, 0); } 4498 4499 void Profile(llvm::FoldingSetNodeID &ID) { 4500 Profile(ID, getValueType()); 4501 } 4502 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 4503 ID.AddPointer(T.getAsOpaquePtr()); 4504 } 4505 static bool classof(const Type *T) { 4506 return T->getTypeClass() == Atomic; 4507 } 4508 }; 4509 4510 /// A qualifier set is used to build a set of qualifiers. 4511 class QualifierCollector : public Qualifiers { 4512 public: 4513 QualifierCollector(Qualifiers Qs = Qualifiers()) : Qualifiers(Qs) {} 4514 4515 /// Collect any qualifiers on the given type and return an 4516 /// unqualified type. The qualifiers are assumed to be consistent 4517 /// with those already in the type. 4518 const Type *strip(QualType type) { 4519 addFastQualifiers(type.getLocalFastQualifiers()); 4520 if (!type.hasLocalNonFastQualifiers()) 4521 return type.getTypePtrUnsafe(); 4522 4523 const ExtQuals *extQuals = type.getExtQualsUnsafe(); 4524 addConsistentQualifiers(extQuals->getQualifiers()); 4525 return extQuals->getBaseType(); 4526 } 4527 4528 /// Apply the collected qualifiers to the given type. 4529 QualType apply(const ASTContext &Context, QualType QT) const; 4530 4531 /// Apply the collected qualifiers to the given type. 4532 QualType apply(const ASTContext &Context, const Type* T) const; 4533 }; 4534 4535 4536 // Inline function definitions. 4537 4538 inline SplitQualType SplitQualType::getSingleStepDesugaredType() const { 4539 SplitQualType desugar = 4540 Ty->getLocallyUnqualifiedSingleStepDesugaredType().split(); 4541 desugar.Quals.addConsistentQualifiers(Quals); 4542 return desugar; 4543 } 4544 4545 inline const Type *QualType::getTypePtr() const { 4546 return getCommonPtr()->BaseType; 4547 } 4548 4549 inline const Type *QualType::getTypePtrOrNull() const { 4550 return (isNull() ? 0 : getCommonPtr()->BaseType); 4551 } 4552 4553 inline SplitQualType QualType::split() const { 4554 if (!hasLocalNonFastQualifiers()) 4555 return SplitQualType(getTypePtrUnsafe(), 4556 Qualifiers::fromFastMask(getLocalFastQualifiers())); 4557 4558 const ExtQuals *eq = getExtQualsUnsafe(); 4559 Qualifiers qs = eq->getQualifiers(); 4560 qs.addFastQualifiers(getLocalFastQualifiers()); 4561 return SplitQualType(eq->getBaseType(), qs); 4562 } 4563 4564 inline Qualifiers QualType::getLocalQualifiers() const { 4565 Qualifiers Quals; 4566 if (hasLocalNonFastQualifiers()) 4567 Quals = getExtQualsUnsafe()->getQualifiers(); 4568 Quals.addFastQualifiers(getLocalFastQualifiers()); 4569 return Quals; 4570 } 4571 4572 inline Qualifiers QualType::getQualifiers() const { 4573 Qualifiers quals = getCommonPtr()->CanonicalType.getLocalQualifiers(); 4574 quals.addFastQualifiers(getLocalFastQualifiers()); 4575 return quals; 4576 } 4577 4578 inline unsigned QualType::getCVRQualifiers() const { 4579 unsigned cvr = getCommonPtr()->CanonicalType.getLocalCVRQualifiers(); 4580 cvr |= getLocalCVRQualifiers(); 4581 return cvr; 4582 } 4583 4584 inline QualType QualType::getCanonicalType() const { 4585 QualType canon = getCommonPtr()->CanonicalType; 4586 return canon.withFastQualifiers(getLocalFastQualifiers()); 4587 } 4588 4589 inline bool QualType::isCanonical() const { 4590 return getTypePtr()->isCanonicalUnqualified(); 4591 } 4592 4593 inline bool QualType::isCanonicalAsParam() const { 4594 if (!isCanonical()) return false; 4595 if (hasLocalQualifiers()) return false; 4596 4597 const Type *T = getTypePtr(); 4598 if (T->isVariablyModifiedType() && T->hasSizedVLAType()) 4599 return false; 4600 4601 return !isa<FunctionType>(T) && !isa<ArrayType>(T); 4602 } 4603 4604 inline bool QualType::isConstQualified() const { 4605 return isLocalConstQualified() || 4606 getCommonPtr()->CanonicalType.isLocalConstQualified(); 4607 } 4608 4609 inline bool QualType::isRestrictQualified() const { 4610 return isLocalRestrictQualified() || 4611 getCommonPtr()->CanonicalType.isLocalRestrictQualified(); 4612 } 4613 4614 4615 inline bool QualType::isVolatileQualified() const { 4616 return isLocalVolatileQualified() || 4617 getCommonPtr()->CanonicalType.isLocalVolatileQualified(); 4618 } 4619 4620 inline bool QualType::hasQualifiers() const { 4621 return hasLocalQualifiers() || 4622 getCommonPtr()->CanonicalType.hasLocalQualifiers(); 4623 } 4624 4625 inline QualType QualType::getUnqualifiedType() const { 4626 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4627 return QualType(getTypePtr(), 0); 4628 4629 return QualType(getSplitUnqualifiedTypeImpl(*this).Ty, 0); 4630 } 4631 4632 inline SplitQualType QualType::getSplitUnqualifiedType() const { 4633 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4634 return split(); 4635 4636 return getSplitUnqualifiedTypeImpl(*this); 4637 } 4638 4639 inline void QualType::removeLocalConst() { 4640 removeLocalFastQualifiers(Qualifiers::Const); 4641 } 4642 4643 inline void QualType::removeLocalRestrict() { 4644 removeLocalFastQualifiers(Qualifiers::Restrict); 4645 } 4646 4647 inline void QualType::removeLocalVolatile() { 4648 removeLocalFastQualifiers(Qualifiers::Volatile); 4649 } 4650 4651 inline void QualType::removeLocalCVRQualifiers(unsigned Mask) { 4652 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 4653 assert((int)Qualifiers::CVRMask == (int)Qualifiers::FastMask); 4654 4655 // Fast path: we don't need to touch the slow qualifiers. 4656 removeLocalFastQualifiers(Mask); 4657 } 4658 4659 /// getAddressSpace - Return the address space of this type. 4660 inline unsigned QualType::getAddressSpace() const { 4661 return getQualifiers().getAddressSpace(); 4662 } 4663 4664 /// getObjCGCAttr - Return the gc attribute of this type. 4665 inline Qualifiers::GC QualType::getObjCGCAttr() const { 4666 return getQualifiers().getObjCGCAttr(); 4667 } 4668 4669 inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { 4670 if (const PointerType *PT = t.getAs<PointerType>()) { 4671 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 4672 return FT->getExtInfo(); 4673 } else if (const FunctionType *FT = t.getAs<FunctionType>()) 4674 return FT->getExtInfo(); 4675 4676 return FunctionType::ExtInfo(); 4677 } 4678 4679 inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { 4680 return getFunctionExtInfo(*t); 4681 } 4682 4683 /// isMoreQualifiedThan - Determine whether this type is more 4684 /// qualified than the Other type. For example, "const volatile int" 4685 /// is more qualified than "const int", "volatile int", and 4686 /// "int". However, it is not more qualified than "const volatile 4687 /// int". 4688 inline bool QualType::isMoreQualifiedThan(QualType other) const { 4689 Qualifiers myQuals = getQualifiers(); 4690 Qualifiers otherQuals = other.getQualifiers(); 4691 return (myQuals != otherQuals && myQuals.compatiblyIncludes(otherQuals)); 4692 } 4693 4694 /// isAtLeastAsQualifiedAs - Determine whether this type is at last 4695 /// as qualified as the Other type. For example, "const volatile 4696 /// int" is at least as qualified as "const int", "volatile int", 4697 /// "int", and "const volatile int". 4698 inline bool QualType::isAtLeastAsQualifiedAs(QualType other) const { 4699 return getQualifiers().compatiblyIncludes(other.getQualifiers()); 4700 } 4701 4702 /// getNonReferenceType - If Type is a reference type (e.g., const 4703 /// int&), returns the type that the reference refers to ("const 4704 /// int"). Otherwise, returns the type itself. This routine is used 4705 /// throughout Sema to implement C++ 5p6: 4706 /// 4707 /// If an expression initially has the type "reference to T" (8.3.2, 4708 /// 8.5.3), the type is adjusted to "T" prior to any further 4709 /// analysis, the expression designates the object or function 4710 /// denoted by the reference, and the expression is an lvalue. 4711 inline QualType QualType::getNonReferenceType() const { 4712 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 4713 return RefType->getPointeeType(); 4714 else 4715 return *this; 4716 } 4717 4718 inline bool QualType::isCForbiddenLValueType() const { 4719 return ((getTypePtr()->isVoidType() && !hasQualifiers()) || 4720 getTypePtr()->isFunctionType()); 4721 } 4722 4723 /// \brief Tests whether the type is categorized as a fundamental type. 4724 /// 4725 /// \returns True for types specified in C++0x [basic.fundamental]. 4726 inline bool Type::isFundamentalType() const { 4727 return isVoidType() || 4728 // FIXME: It's really annoying that we don't have an 4729 // 'isArithmeticType()' which agrees with the standard definition. 4730 (isArithmeticType() && !isEnumeralType()); 4731 } 4732 4733 /// \brief Tests whether the type is categorized as a compound type. 4734 /// 4735 /// \returns True for types specified in C++0x [basic.compound]. 4736 inline bool Type::isCompoundType() const { 4737 // C++0x [basic.compound]p1: 4738 // Compound types can be constructed in the following ways: 4739 // -- arrays of objects of a given type [...]; 4740 return isArrayType() || 4741 // -- functions, which have parameters of given types [...]; 4742 isFunctionType() || 4743 // -- pointers to void or objects or functions [...]; 4744 isPointerType() || 4745 // -- references to objects or functions of a given type. [...] 4746 isReferenceType() || 4747 // -- classes containing a sequence of objects of various types, [...]; 4748 isRecordType() || 4749 // -- unions, which are classes capable of containing objects of different 4750 // types at different times; 4751 isUnionType() || 4752 // -- enumerations, which comprise a set of named constant values. [...]; 4753 isEnumeralType() || 4754 // -- pointers to non-static class members, [...]. 4755 isMemberPointerType(); 4756 } 4757 4758 inline bool Type::isFunctionType() const { 4759 return isa<FunctionType>(CanonicalType); 4760 } 4761 inline bool Type::isPointerType() const { 4762 return isa<PointerType>(CanonicalType); 4763 } 4764 inline bool Type::isAnyPointerType() const { 4765 return isPointerType() || isObjCObjectPointerType(); 4766 } 4767 inline bool Type::isBlockPointerType() const { 4768 return isa<BlockPointerType>(CanonicalType); 4769 } 4770 inline bool Type::isReferenceType() const { 4771 return isa<ReferenceType>(CanonicalType); 4772 } 4773 inline bool Type::isLValueReferenceType() const { 4774 return isa<LValueReferenceType>(CanonicalType); 4775 } 4776 inline bool Type::isRValueReferenceType() const { 4777 return isa<RValueReferenceType>(CanonicalType); 4778 } 4779 inline bool Type::isFunctionPointerType() const { 4780 if (const PointerType *T = getAs<PointerType>()) 4781 return T->getPointeeType()->isFunctionType(); 4782 else 4783 return false; 4784 } 4785 inline bool Type::isMemberPointerType() const { 4786 return isa<MemberPointerType>(CanonicalType); 4787 } 4788 inline bool Type::isMemberFunctionPointerType() const { 4789 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4790 return T->isMemberFunctionPointer(); 4791 else 4792 return false; 4793 } 4794 inline bool Type::isMemberDataPointerType() const { 4795 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4796 return T->isMemberDataPointer(); 4797 else 4798 return false; 4799 } 4800 inline bool Type::isArrayType() const { 4801 return isa<ArrayType>(CanonicalType); 4802 } 4803 inline bool Type::isConstantArrayType() const { 4804 return isa<ConstantArrayType>(CanonicalType); 4805 } 4806 inline bool Type::isIncompleteArrayType() const { 4807 return isa<IncompleteArrayType>(CanonicalType); 4808 } 4809 inline bool Type::isVariableArrayType() const { 4810 return isa<VariableArrayType>(CanonicalType); 4811 } 4812 inline bool Type::isDependentSizedArrayType() const { 4813 return isa<DependentSizedArrayType>(CanonicalType); 4814 } 4815 inline bool Type::isBuiltinType() const { 4816 return isa<BuiltinType>(CanonicalType); 4817 } 4818 inline bool Type::isRecordType() const { 4819 return isa<RecordType>(CanonicalType); 4820 } 4821 inline bool Type::isEnumeralType() const { 4822 return isa<EnumType>(CanonicalType); 4823 } 4824 inline bool Type::isAnyComplexType() const { 4825 return isa<ComplexType>(CanonicalType); 4826 } 4827 inline bool Type::isVectorType() const { 4828 return isa<VectorType>(CanonicalType); 4829 } 4830 inline bool Type::isExtVectorType() const { 4831 return isa<ExtVectorType>(CanonicalType); 4832 } 4833 inline bool Type::isObjCObjectPointerType() const { 4834 return isa<ObjCObjectPointerType>(CanonicalType); 4835 } 4836 inline bool Type::isObjCObjectType() const { 4837 return isa<ObjCObjectType>(CanonicalType); 4838 } 4839 inline bool Type::isObjCObjectOrInterfaceType() const { 4840 return isa<ObjCInterfaceType>(CanonicalType) || 4841 isa<ObjCObjectType>(CanonicalType); 4842 } 4843 inline bool Type::isAtomicType() const { 4844 return isa<AtomicType>(CanonicalType); 4845 } 4846 4847 inline bool Type::isObjCQualifiedIdType() const { 4848 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4849 return OPT->isObjCQualifiedIdType(); 4850 return false; 4851 } 4852 inline bool Type::isObjCQualifiedClassType() const { 4853 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4854 return OPT->isObjCQualifiedClassType(); 4855 return false; 4856 } 4857 inline bool Type::isObjCIdType() const { 4858 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4859 return OPT->isObjCIdType(); 4860 return false; 4861 } 4862 inline bool Type::isObjCClassType() const { 4863 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4864 return OPT->isObjCClassType(); 4865 return false; 4866 } 4867 inline bool Type::isObjCSelType() const { 4868 if (const PointerType *OPT = getAs<PointerType>()) 4869 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 4870 return false; 4871 } 4872 inline bool Type::isObjCBuiltinType() const { 4873 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 4874 } 4875 4876 inline bool Type::isImage1dT() const { 4877 return isSpecificBuiltinType(BuiltinType::OCLImage1d); 4878 } 4879 4880 inline bool Type::isImage1dArrayT() const { 4881 return isSpecificBuiltinType(BuiltinType::OCLImage1dArray); 4882 } 4883 4884 inline bool Type::isImage1dBufferT() const { 4885 return isSpecificBuiltinType(BuiltinType::OCLImage1dBuffer); 4886 } 4887 4888 inline bool Type::isImage2dT() const { 4889 return isSpecificBuiltinType(BuiltinType::OCLImage2d); 4890 } 4891 4892 inline bool Type::isImage2dArrayT() const { 4893 return isSpecificBuiltinType(BuiltinType::OCLImage2dArray); 4894 } 4895 4896 inline bool Type::isImage3dT() const { 4897 return isSpecificBuiltinType(BuiltinType::OCLImage3d); 4898 } 4899 4900 inline bool Type::isSamplerT() const { 4901 return isSpecificBuiltinType(BuiltinType::OCLSampler); 4902 } 4903 4904 inline bool Type::isEventT() const { 4905 return isSpecificBuiltinType(BuiltinType::OCLEvent); 4906 } 4907 4908 inline bool Type::isImageType() const { 4909 return isImage3dT() || 4910 isImage2dT() || isImage2dArrayT() || 4911 isImage1dT() || isImage1dArrayT() || isImage1dBufferT(); 4912 } 4913 4914 inline bool Type::isOpenCLSpecificType() const { 4915 return isSamplerT() || isEventT() || isImageType(); 4916 } 4917 4918 inline bool Type::isTemplateTypeParmType() const { 4919 return isa<TemplateTypeParmType>(CanonicalType); 4920 } 4921 4922 inline bool Type::isSpecificBuiltinType(unsigned K) const { 4923 if (const BuiltinType *BT = getAs<BuiltinType>()) 4924 if (BT->getKind() == (BuiltinType::Kind) K) 4925 return true; 4926 return false; 4927 } 4928 4929 inline bool Type::isPlaceholderType() const { 4930 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4931 return BT->isPlaceholderType(); 4932 return false; 4933 } 4934 4935 inline const BuiltinType *Type::getAsPlaceholderType() const { 4936 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4937 if (BT->isPlaceholderType()) 4938 return BT; 4939 return 0; 4940 } 4941 4942 inline bool Type::isSpecificPlaceholderType(unsigned K) const { 4943 assert(BuiltinType::isPlaceholderTypeKind((BuiltinType::Kind) K)); 4944 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4945 return (BT->getKind() == (BuiltinType::Kind) K); 4946 return false; 4947 } 4948 4949 inline bool Type::isNonOverloadPlaceholderType() const { 4950 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4951 return BT->isNonOverloadPlaceholderType(); 4952 return false; 4953 } 4954 4955 inline bool Type::isVoidType() const { 4956 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 4957 return BT->getKind() == BuiltinType::Void; 4958 return false; 4959 } 4960 4961 inline bool Type::isHalfType() const { 4962 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 4963 return BT->getKind() == BuiltinType::Half; 4964 // FIXME: Should we allow complex __fp16? Probably not. 4965 return false; 4966 } 4967 4968 inline bool Type::isNullPtrType() const { 4969 if (const BuiltinType *BT = getAs<BuiltinType>()) 4970 return BT->getKind() == BuiltinType::NullPtr; 4971 return false; 4972 } 4973 4974 extern bool IsEnumDeclComplete(EnumDecl *); 4975 extern bool IsEnumDeclScoped(EnumDecl *); 4976 4977 inline bool Type::isIntegerType() const { 4978 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 4979 return BT->getKind() >= BuiltinType::Bool && 4980 BT->getKind() <= BuiltinType::Int128; 4981 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) { 4982 // Incomplete enum types are not treated as integer types. 4983 // FIXME: In C++, enum types are never integer types. 4984 return IsEnumDeclComplete(ET->getDecl()) && 4985 !IsEnumDeclScoped(ET->getDecl()); 4986 } 4987 return false; 4988 } 4989 4990 inline bool Type::isScalarType() const { 4991 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 4992 return BT->getKind() > BuiltinType::Void && 4993 BT->getKind() <= BuiltinType::NullPtr; 4994 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) 4995 // Enums are scalar types, but only if they are defined. Incomplete enums 4996 // are not treated as scalar types. 4997 return IsEnumDeclComplete(ET->getDecl()); 4998 return isa<PointerType>(CanonicalType) || 4999 isa<BlockPointerType>(CanonicalType) || 5000 isa<MemberPointerType>(CanonicalType) || 5001 isa<ComplexType>(CanonicalType) || 5002 isa<ObjCObjectPointerType>(CanonicalType); 5003 } 5004 5005 inline bool Type::isIntegralOrEnumerationType() const { 5006 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 5007 return BT->getKind() >= BuiltinType::Bool && 5008 BT->getKind() <= BuiltinType::Int128; 5009 5010 // Check for a complete enum type; incomplete enum types are not properly an 5011 // enumeration type in the sense required here. 5012 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) 5013 return IsEnumDeclComplete(ET->getDecl()); 5014 5015 return false; 5016 } 5017 5018 inline bool Type::isBooleanType() const { 5019 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 5020 return BT->getKind() == BuiltinType::Bool; 5021 return false; 5022 } 5023 5024 /// \brief Determines whether this is a type for which one can define 5025 /// an overloaded operator. 5026 inline bool Type::isOverloadableType() const { 5027 return isDependentType() || isRecordType() || isEnumeralType(); 5028 } 5029 5030 /// \brief Determines whether this type can decay to a pointer type. 5031 inline bool Type::canDecayToPointerType() const { 5032 return isFunctionType() || isArrayType(); 5033 } 5034 5035 inline bool Type::hasPointerRepresentation() const { 5036 return (isPointerType() || isReferenceType() || isBlockPointerType() || 5037 isObjCObjectPointerType() || isNullPtrType()); 5038 } 5039 5040 inline bool Type::hasObjCPointerRepresentation() const { 5041 return isObjCObjectPointerType(); 5042 } 5043 5044 inline const Type *Type::getBaseElementTypeUnsafe() const { 5045 const Type *type = this; 5046 while (const ArrayType *arrayType = type->getAsArrayTypeUnsafe()) 5047 type = arrayType->getElementType().getTypePtr(); 5048 return type; 5049 } 5050 5051 /// Insertion operator for diagnostics. This allows sending QualType's into a 5052 /// diagnostic with <<. 5053 inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 5054 QualType T) { 5055 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 5056 DiagnosticsEngine::ak_qualtype); 5057 return DB; 5058 } 5059 5060 /// Insertion operator for partial diagnostics. This allows sending QualType's 5061 /// into a diagnostic with <<. 5062 inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, 5063 QualType T) { 5064 PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 5065 DiagnosticsEngine::ak_qualtype); 5066 return PD; 5067 } 5068 5069 // Helper class template that is used by Type::getAs to ensure that one does 5070 // not try to look through a qualified type to get to an array type. 5071 template<typename T, 5072 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 5073 llvm::is_base_of<ArrayType, T>::value)> 5074 struct ArrayType_cannot_be_used_with_getAs { }; 5075 5076 template<typename T> 5077 struct ArrayType_cannot_be_used_with_getAs<T, true>; 5078 5079 // Member-template getAs<specific type>'. 5080 template <typename T> const T *Type::getAs() const { 5081 ArrayType_cannot_be_used_with_getAs<T> at; 5082 (void)at; 5083 5084 // If this is directly a T type, return it. 5085 if (const T *Ty = dyn_cast<T>(this)) 5086 return Ty; 5087 5088 // If the canonical form of this type isn't the right kind, reject it. 5089 if (!isa<T>(CanonicalType)) 5090 return 0; 5091 5092 // If this is a typedef for the type, strip the typedef off without 5093 // losing all typedef information. 5094 return cast<T>(getUnqualifiedDesugaredType()); 5095 } 5096 5097 inline const ArrayType *Type::getAsArrayTypeUnsafe() const { 5098 // If this is directly an array type, return it. 5099 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) 5100 return arr; 5101 5102 // If the canonical form of this type isn't the right kind, reject it. 5103 if (!isa<ArrayType>(CanonicalType)) 5104 return 0; 5105 5106 // If this is a typedef for the type, strip the typedef off without 5107 // losing all typedef information. 5108 return cast<ArrayType>(getUnqualifiedDesugaredType()); 5109 } 5110 5111 template <typename T> const T *Type::castAs() const { 5112 ArrayType_cannot_be_used_with_getAs<T> at; 5113 (void) at; 5114 5115 assert(isa<T>(CanonicalType)); 5116 if (const T *ty = dyn_cast<T>(this)) return ty; 5117 return cast<T>(getUnqualifiedDesugaredType()); 5118 } 5119 5120 inline const ArrayType *Type::castAsArrayTypeUnsafe() const { 5121 assert(isa<ArrayType>(CanonicalType)); 5122 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) return arr; 5123 return cast<ArrayType>(getUnqualifiedDesugaredType()); 5124 } 5125 5126 } // end namespace clang 5127 5128 #endif 5129