Type.h revision bea522ff43a3f11c7a2bc7949119dbb9fce19e39
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 36namespace clang { 37 enum { 38 TypeAlignmentInBits = 4, 39 TypeAlignment = 1 << TypeAlignmentInBits 40 }; 41 class Type; 42 class ExtQuals; 43 class QualType; 44} 45 46namespace 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 72namespace 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) 113class Qualifiers { 114public: 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 480private: 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. 496struct 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. 533class 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; 555public: 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 982private: 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 998namespace llvm { 999/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 1000/// to a specific Type class. 1001template<> 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}; 1007template<> struct simplify_type< ::clang::QualType> 1008 : public simplify_type<const ::clang::QualType> {}; 1009 1010// Teach SmallPtrSet that QualType is "basically a pointer". 1011template<> 1012class PointerLikeTypeTraits<clang::QualType> { 1013public: 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 1026namespace 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/// 1032class 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. 1061class 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 1081public: 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 1108public: 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. 1124enum 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/// 1158class Type : public ExtQualsTypeCommonBase { 1159public: 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 1168private: 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 1221protected: 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 1343private: 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 1351protected: 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 1384public: 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 Note that the linkage is no longer known. 1778 void ClearLinkageCache(); 1779 1780 const char *getTypeClassName() const; 1781 1782 QualType getCanonicalTypeInternal() const { 1783 return CanonicalType; 1784 } 1785 CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h 1786 LLVM_ATTRIBUTE_USED void dump() const; 1787 1788 friend class ASTReader; 1789 friend class ASTWriter; 1790}; 1791 1792/// \brief This will check for a TypedefType by removing any existing sugar 1793/// until it reaches a TypedefType or a non-sugared type. 1794template <> const TypedefType *Type::getAs() const; 1795 1796/// \brief This will check for a TemplateSpecializationType by removing any 1797/// existing sugar until it reaches a TemplateSpecializationType or a 1798/// non-sugared type. 1799template <> const TemplateSpecializationType *Type::getAs() const; 1800 1801// We can do canonical leaf types faster, because we don't have to 1802// worry about preserving child type decoration. 1803#define TYPE(Class, Base) 1804#define LEAF_TYPE(Class) \ 1805template <> inline const Class##Type *Type::getAs() const { \ 1806 return dyn_cast<Class##Type>(CanonicalType); \ 1807} \ 1808template <> inline const Class##Type *Type::castAs() const { \ 1809 return cast<Class##Type>(CanonicalType); \ 1810} 1811#include "clang/AST/TypeNodes.def" 1812 1813 1814/// BuiltinType - This class is used for builtin types like 'int'. Builtin 1815/// types are always canonical and have a literal name field. 1816class BuiltinType : public Type { 1817public: 1818 enum Kind { 1819#define BUILTIN_TYPE(Id, SingletonId) Id, 1820#define LAST_BUILTIN_TYPE(Id) LastKind = Id 1821#include "clang/AST/BuiltinTypes.def" 1822 }; 1823 1824public: 1825 BuiltinType(Kind K) 1826 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent), 1827 /*InstantiationDependent=*/(K == Dependent), 1828 /*VariablyModified=*/false, 1829 /*Unexpanded paramter pack=*/false) { 1830 BuiltinTypeBits.Kind = K; 1831 } 1832 1833 Kind getKind() const { return static_cast<Kind>(BuiltinTypeBits.Kind); } 1834 StringRef getName(const PrintingPolicy &Policy) const; 1835 const char *getNameAsCString(const PrintingPolicy &Policy) const { 1836 // The StringRef is null-terminated. 1837 StringRef str = getName(Policy); 1838 assert(!str.empty() && str.data()[str.size()] == '\0'); 1839 return str.data(); 1840 } 1841 1842 bool isSugared() const { return false; } 1843 QualType desugar() const { return QualType(this, 0); } 1844 1845 bool isInteger() const { 1846 return getKind() >= Bool && getKind() <= Int128; 1847 } 1848 1849 bool isSignedInteger() const { 1850 return getKind() >= Char_S && getKind() <= Int128; 1851 } 1852 1853 bool isUnsignedInteger() const { 1854 return getKind() >= Bool && getKind() <= UInt128; 1855 } 1856 1857 bool isFloatingPoint() const { 1858 return getKind() >= Half && getKind() <= LongDouble; 1859 } 1860 1861 /// Determines whether the given kind corresponds to a placeholder type. 1862 static bool isPlaceholderTypeKind(Kind K) { 1863 return K >= Overload; 1864 } 1865 1866 /// Determines whether this type is a placeholder type, i.e. a type 1867 /// which cannot appear in arbitrary positions in a fully-formed 1868 /// expression. 1869 bool isPlaceholderType() const { 1870 return isPlaceholderTypeKind(getKind()); 1871 } 1872 1873 /// Determines whether this type is a placeholder type other than 1874 /// Overload. Most placeholder types require only syntactic 1875 /// information about their context in order to be resolved (e.g. 1876 /// whether it is a call expression), which means they can (and 1877 /// should) be resolved in an earlier "phase" of analysis. 1878 /// Overload expressions sometimes pick up further information 1879 /// from their context, like whether the context expects a 1880 /// specific function-pointer type, and so frequently need 1881 /// special treatment. 1882 bool isNonOverloadPlaceholderType() const { 1883 return getKind() > Overload; 1884 } 1885 1886 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1887}; 1888 1889/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1890/// types (_Complex float etc) as well as the GCC integer complex extensions. 1891/// 1892class ComplexType : public Type, public llvm::FoldingSetNode { 1893 QualType ElementType; 1894 ComplexType(QualType Element, QualType CanonicalPtr) : 1895 Type(Complex, CanonicalPtr, Element->isDependentType(), 1896 Element->isInstantiationDependentType(), 1897 Element->isVariablyModifiedType(), 1898 Element->containsUnexpandedParameterPack()), 1899 ElementType(Element) { 1900 } 1901 friend class ASTContext; // ASTContext creates these. 1902 1903public: 1904 QualType getElementType() const { return ElementType; } 1905 1906 bool isSugared() const { return false; } 1907 QualType desugar() const { return QualType(this, 0); } 1908 1909 void Profile(llvm::FoldingSetNodeID &ID) { 1910 Profile(ID, getElementType()); 1911 } 1912 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1913 ID.AddPointer(Element.getAsOpaquePtr()); 1914 } 1915 1916 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1917}; 1918 1919/// ParenType - Sugar for parentheses used when specifying types. 1920/// 1921class ParenType : public Type, public llvm::FoldingSetNode { 1922 QualType Inner; 1923 1924 ParenType(QualType InnerType, QualType CanonType) : 1925 Type(Paren, CanonType, InnerType->isDependentType(), 1926 InnerType->isInstantiationDependentType(), 1927 InnerType->isVariablyModifiedType(), 1928 InnerType->containsUnexpandedParameterPack()), 1929 Inner(InnerType) { 1930 } 1931 friend class ASTContext; // ASTContext creates these. 1932 1933public: 1934 1935 QualType getInnerType() const { return Inner; } 1936 1937 bool isSugared() const { return true; } 1938 QualType desugar() const { return getInnerType(); } 1939 1940 void Profile(llvm::FoldingSetNodeID &ID) { 1941 Profile(ID, getInnerType()); 1942 } 1943 static void Profile(llvm::FoldingSetNodeID &ID, QualType Inner) { 1944 Inner.Profile(ID); 1945 } 1946 1947 static bool classof(const Type *T) { return T->getTypeClass() == Paren; } 1948}; 1949 1950/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1951/// 1952class PointerType : public Type, public llvm::FoldingSetNode { 1953 QualType PointeeType; 1954 1955 PointerType(QualType Pointee, QualType CanonicalPtr) : 1956 Type(Pointer, CanonicalPtr, Pointee->isDependentType(), 1957 Pointee->isInstantiationDependentType(), 1958 Pointee->isVariablyModifiedType(), 1959 Pointee->containsUnexpandedParameterPack()), 1960 PointeeType(Pointee) { 1961 } 1962 friend class ASTContext; // ASTContext creates these. 1963 1964public: 1965 1966 QualType getPointeeType() const { return PointeeType; } 1967 1968 bool isSugared() const { return false; } 1969 QualType desugar() const { return QualType(this, 0); } 1970 1971 void Profile(llvm::FoldingSetNodeID &ID) { 1972 Profile(ID, getPointeeType()); 1973 } 1974 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1975 ID.AddPointer(Pointee.getAsOpaquePtr()); 1976 } 1977 1978 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1979}; 1980 1981/// BlockPointerType - pointer to a block type. 1982/// This type is to represent types syntactically represented as 1983/// "void (^)(int)", etc. Pointee is required to always be a function type. 1984/// 1985class BlockPointerType : public Type, public llvm::FoldingSetNode { 1986 QualType PointeeType; // Block is some kind of pointer type 1987 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1988 Type(BlockPointer, CanonicalCls, Pointee->isDependentType(), 1989 Pointee->isInstantiationDependentType(), 1990 Pointee->isVariablyModifiedType(), 1991 Pointee->containsUnexpandedParameterPack()), 1992 PointeeType(Pointee) { 1993 } 1994 friend class ASTContext; // ASTContext creates these. 1995 1996public: 1997 1998 // Get the pointee type. Pointee is required to always be a function type. 1999 QualType getPointeeType() const { return PointeeType; } 2000 2001 bool isSugared() const { return false; } 2002 QualType desugar() const { return QualType(this, 0); } 2003 2004 void Profile(llvm::FoldingSetNodeID &ID) { 2005 Profile(ID, getPointeeType()); 2006 } 2007 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 2008 ID.AddPointer(Pointee.getAsOpaquePtr()); 2009 } 2010 2011 static bool classof(const Type *T) { 2012 return T->getTypeClass() == BlockPointer; 2013 } 2014}; 2015 2016/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 2017/// 2018class ReferenceType : public Type, public llvm::FoldingSetNode { 2019 QualType PointeeType; 2020 2021protected: 2022 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 2023 bool SpelledAsLValue) : 2024 Type(tc, CanonicalRef, Referencee->isDependentType(), 2025 Referencee->isInstantiationDependentType(), 2026 Referencee->isVariablyModifiedType(), 2027 Referencee->containsUnexpandedParameterPack()), 2028 PointeeType(Referencee) 2029 { 2030 ReferenceTypeBits.SpelledAsLValue = SpelledAsLValue; 2031 ReferenceTypeBits.InnerRef = Referencee->isReferenceType(); 2032 } 2033 2034public: 2035 bool isSpelledAsLValue() const { return ReferenceTypeBits.SpelledAsLValue; } 2036 bool isInnerRef() const { return ReferenceTypeBits.InnerRef; } 2037 2038 QualType getPointeeTypeAsWritten() const { return PointeeType; } 2039 QualType getPointeeType() const { 2040 // FIXME: this might strip inner qualifiers; okay? 2041 const ReferenceType *T = this; 2042 while (T->isInnerRef()) 2043 T = T->PointeeType->castAs<ReferenceType>(); 2044 return T->PointeeType; 2045 } 2046 2047 void Profile(llvm::FoldingSetNodeID &ID) { 2048 Profile(ID, PointeeType, isSpelledAsLValue()); 2049 } 2050 static void Profile(llvm::FoldingSetNodeID &ID, 2051 QualType Referencee, 2052 bool SpelledAsLValue) { 2053 ID.AddPointer(Referencee.getAsOpaquePtr()); 2054 ID.AddBoolean(SpelledAsLValue); 2055 } 2056 2057 static bool classof(const Type *T) { 2058 return T->getTypeClass() == LValueReference || 2059 T->getTypeClass() == RValueReference; 2060 } 2061}; 2062 2063/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 2064/// 2065class LValueReferenceType : public ReferenceType { 2066 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 2067 bool SpelledAsLValue) : 2068 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 2069 {} 2070 friend class ASTContext; // ASTContext creates these 2071public: 2072 bool isSugared() const { return false; } 2073 QualType desugar() const { return QualType(this, 0); } 2074 2075 static bool classof(const Type *T) { 2076 return T->getTypeClass() == LValueReference; 2077 } 2078}; 2079 2080/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 2081/// 2082class RValueReferenceType : public ReferenceType { 2083 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 2084 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 2085 } 2086 friend class ASTContext; // ASTContext creates these 2087public: 2088 bool isSugared() const { return false; } 2089 QualType desugar() const { return QualType(this, 0); } 2090 2091 static bool classof(const Type *T) { 2092 return T->getTypeClass() == RValueReference; 2093 } 2094}; 2095 2096/// MemberPointerType - C++ 8.3.3 - Pointers to members 2097/// 2098class MemberPointerType : public Type, public llvm::FoldingSetNode { 2099 QualType PointeeType; 2100 /// The class of which the pointee is a member. Must ultimately be a 2101 /// RecordType, but could be a typedef or a template parameter too. 2102 const Type *Class; 2103 2104 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 2105 Type(MemberPointer, CanonicalPtr, 2106 Cls->isDependentType() || Pointee->isDependentType(), 2107 (Cls->isInstantiationDependentType() || 2108 Pointee->isInstantiationDependentType()), 2109 Pointee->isVariablyModifiedType(), 2110 (Cls->containsUnexpandedParameterPack() || 2111 Pointee->containsUnexpandedParameterPack())), 2112 PointeeType(Pointee), Class(Cls) { 2113 } 2114 friend class ASTContext; // ASTContext creates these. 2115 2116public: 2117 QualType getPointeeType() const { return PointeeType; } 2118 2119 /// Returns true if the member type (i.e. the pointee type) is a 2120 /// function type rather than a data-member type. 2121 bool isMemberFunctionPointer() const { 2122 return PointeeType->isFunctionProtoType(); 2123 } 2124 2125 /// Returns true if the member type (i.e. the pointee type) is a 2126 /// data type rather than a function type. 2127 bool isMemberDataPointer() const { 2128 return !PointeeType->isFunctionProtoType(); 2129 } 2130 2131 const Type *getClass() const { return Class; } 2132 2133 bool isSugared() const { return false; } 2134 QualType desugar() const { return QualType(this, 0); } 2135 2136 void Profile(llvm::FoldingSetNodeID &ID) { 2137 Profile(ID, getPointeeType(), getClass()); 2138 } 2139 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 2140 const Type *Class) { 2141 ID.AddPointer(Pointee.getAsOpaquePtr()); 2142 ID.AddPointer(Class); 2143 } 2144 2145 static bool classof(const Type *T) { 2146 return T->getTypeClass() == MemberPointer; 2147 } 2148}; 2149 2150/// ArrayType - C99 6.7.5.2 - Array Declarators. 2151/// 2152class ArrayType : public Type, public llvm::FoldingSetNode { 2153public: 2154 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 2155 /// an array with a static size (e.g. int X[static 4]), or an array 2156 /// with a star size (e.g. int X[*]). 2157 /// 'static' is only allowed on function parameters. 2158 enum ArraySizeModifier { 2159 Normal, Static, Star 2160 }; 2161private: 2162 /// ElementType - The element type of the array. 2163 QualType ElementType; 2164 2165protected: 2166 // C++ [temp.dep.type]p1: 2167 // A type is dependent if it is... 2168 // - an array type constructed from any dependent type or whose 2169 // size is specified by a constant expression that is 2170 // value-dependent, 2171 ArrayType(TypeClass tc, QualType et, QualType can, 2172 ArraySizeModifier sm, unsigned tq, 2173 bool ContainsUnexpandedParameterPack) 2174 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray, 2175 et->isInstantiationDependentType() || tc == DependentSizedArray, 2176 (tc == VariableArray || et->isVariablyModifiedType()), 2177 ContainsUnexpandedParameterPack), 2178 ElementType(et) { 2179 ArrayTypeBits.IndexTypeQuals = tq; 2180 ArrayTypeBits.SizeModifier = sm; 2181 } 2182 2183 friend class ASTContext; // ASTContext creates these. 2184 2185public: 2186 QualType getElementType() const { return ElementType; } 2187 ArraySizeModifier getSizeModifier() const { 2188 return ArraySizeModifier(ArrayTypeBits.SizeModifier); 2189 } 2190 Qualifiers getIndexTypeQualifiers() const { 2191 return Qualifiers::fromCVRMask(getIndexTypeCVRQualifiers()); 2192 } 2193 unsigned getIndexTypeCVRQualifiers() const { 2194 return ArrayTypeBits.IndexTypeQuals; 2195 } 2196 2197 static bool classof(const Type *T) { 2198 return T->getTypeClass() == ConstantArray || 2199 T->getTypeClass() == VariableArray || 2200 T->getTypeClass() == IncompleteArray || 2201 T->getTypeClass() == DependentSizedArray; 2202 } 2203}; 2204 2205/// ConstantArrayType - This class represents the canonical version of 2206/// C arrays with a specified constant size. For example, the canonical 2207/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 2208/// type is 'int' and the size is 404. 2209class ConstantArrayType : public ArrayType { 2210 llvm::APInt Size; // Allows us to unique the type. 2211 2212 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 2213 ArraySizeModifier sm, unsigned tq) 2214 : ArrayType(ConstantArray, et, can, sm, tq, 2215 et->containsUnexpandedParameterPack()), 2216 Size(size) {} 2217protected: 2218 ConstantArrayType(TypeClass tc, QualType et, QualType can, 2219 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 2220 : ArrayType(tc, et, can, sm, tq, et->containsUnexpandedParameterPack()), 2221 Size(size) {} 2222 friend class ASTContext; // ASTContext creates these. 2223public: 2224 const llvm::APInt &getSize() const { return Size; } 2225 bool isSugared() const { return false; } 2226 QualType desugar() const { return QualType(this, 0); } 2227 2228 2229 /// \brief Determine the number of bits required to address a member of 2230 // an array with the given element type and number of elements. 2231 static unsigned getNumAddressingBits(ASTContext &Context, 2232 QualType ElementType, 2233 const llvm::APInt &NumElements); 2234 2235 /// \brief Determine the maximum number of active bits that an array's size 2236 /// can require, which limits the maximum size of the array. 2237 static unsigned getMaxSizeBits(ASTContext &Context); 2238 2239 void Profile(llvm::FoldingSetNodeID &ID) { 2240 Profile(ID, getElementType(), getSize(), 2241 getSizeModifier(), getIndexTypeCVRQualifiers()); 2242 } 2243 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 2244 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 2245 unsigned TypeQuals) { 2246 ID.AddPointer(ET.getAsOpaquePtr()); 2247 ID.AddInteger(ArraySize.getZExtValue()); 2248 ID.AddInteger(SizeMod); 2249 ID.AddInteger(TypeQuals); 2250 } 2251 static bool classof(const Type *T) { 2252 return T->getTypeClass() == ConstantArray; 2253 } 2254}; 2255 2256/// IncompleteArrayType - This class represents C arrays with an unspecified 2257/// size. For example 'int A[]' has an IncompleteArrayType where the element 2258/// type is 'int' and the size is unspecified. 2259class IncompleteArrayType : public ArrayType { 2260 2261 IncompleteArrayType(QualType et, QualType can, 2262 ArraySizeModifier sm, unsigned tq) 2263 : ArrayType(IncompleteArray, et, can, sm, tq, 2264 et->containsUnexpandedParameterPack()) {} 2265 friend class ASTContext; // ASTContext creates these. 2266public: 2267 bool isSugared() const { return false; } 2268 QualType desugar() const { return QualType(this, 0); } 2269 2270 static bool classof(const Type *T) { 2271 return T->getTypeClass() == IncompleteArray; 2272 } 2273 2274 friend class StmtIteratorBase; 2275 2276 void Profile(llvm::FoldingSetNodeID &ID) { 2277 Profile(ID, getElementType(), getSizeModifier(), 2278 getIndexTypeCVRQualifiers()); 2279 } 2280 2281 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 2282 ArraySizeModifier SizeMod, unsigned TypeQuals) { 2283 ID.AddPointer(ET.getAsOpaquePtr()); 2284 ID.AddInteger(SizeMod); 2285 ID.AddInteger(TypeQuals); 2286 } 2287}; 2288 2289/// VariableArrayType - This class represents C arrays with a specified size 2290/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 2291/// Since the size expression is an arbitrary expression, we store it as such. 2292/// 2293/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 2294/// should not be: two lexically equivalent variable array types could mean 2295/// different things, for example, these variables do not have the same type 2296/// dynamically: 2297/// 2298/// void foo(int x) { 2299/// int Y[x]; 2300/// ++x; 2301/// int Z[x]; 2302/// } 2303/// 2304class VariableArrayType : public ArrayType { 2305 /// SizeExpr - An assignment expression. VLA's are only permitted within 2306 /// a function block. 2307 Stmt *SizeExpr; 2308 /// Brackets - The left and right array brackets. 2309 SourceRange Brackets; 2310 2311 VariableArrayType(QualType et, QualType can, Expr *e, 2312 ArraySizeModifier sm, unsigned tq, 2313 SourceRange brackets) 2314 : ArrayType(VariableArray, et, can, sm, tq, 2315 et->containsUnexpandedParameterPack()), 2316 SizeExpr((Stmt*) e), Brackets(brackets) {} 2317 friend class ASTContext; // ASTContext creates these. 2318 2319public: 2320 Expr *getSizeExpr() const { 2321 // We use C-style casts instead of cast<> here because we do not wish 2322 // to have a dependency of Type.h on Stmt.h/Expr.h. 2323 return (Expr*) SizeExpr; 2324 } 2325 SourceRange getBracketsRange() const { return Brackets; } 2326 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 2327 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 2328 2329 bool isSugared() const { return false; } 2330 QualType desugar() const { return QualType(this, 0); } 2331 2332 static bool classof(const Type *T) { 2333 return T->getTypeClass() == VariableArray; 2334 } 2335 2336 friend class StmtIteratorBase; 2337 2338 void Profile(llvm::FoldingSetNodeID &ID) { 2339 llvm_unreachable("Cannot unique VariableArrayTypes."); 2340 } 2341}; 2342 2343/// DependentSizedArrayType - This type represents an array type in 2344/// C++ whose size is a value-dependent expression. For example: 2345/// 2346/// \code 2347/// template<typename T, int Size> 2348/// class array { 2349/// T data[Size]; 2350/// }; 2351/// \endcode 2352/// 2353/// For these types, we won't actually know what the array bound is 2354/// until template instantiation occurs, at which point this will 2355/// become either a ConstantArrayType or a VariableArrayType. 2356class DependentSizedArrayType : public ArrayType { 2357 const ASTContext &Context; 2358 2359 /// \brief An assignment expression that will instantiate to the 2360 /// size of the array. 2361 /// 2362 /// The expression itself might be NULL, in which case the array 2363 /// type will have its size deduced from an initializer. 2364 Stmt *SizeExpr; 2365 2366 /// Brackets - The left and right array brackets. 2367 SourceRange Brackets; 2368 2369 DependentSizedArrayType(const ASTContext &Context, QualType et, QualType can, 2370 Expr *e, ArraySizeModifier sm, unsigned tq, 2371 SourceRange brackets); 2372 2373 friend class ASTContext; // ASTContext creates these. 2374 2375public: 2376 Expr *getSizeExpr() const { 2377 // We use C-style casts instead of cast<> here because we do not wish 2378 // to have a dependency of Type.h on Stmt.h/Expr.h. 2379 return (Expr*) SizeExpr; 2380 } 2381 SourceRange getBracketsRange() const { return Brackets; } 2382 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 2383 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 2384 2385 bool isSugared() const { return false; } 2386 QualType desugar() const { return QualType(this, 0); } 2387 2388 static bool classof(const Type *T) { 2389 return T->getTypeClass() == DependentSizedArray; 2390 } 2391 2392 friend class StmtIteratorBase; 2393 2394 2395 void Profile(llvm::FoldingSetNodeID &ID) { 2396 Profile(ID, Context, getElementType(), 2397 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 2398 } 2399 2400 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2401 QualType ET, ArraySizeModifier SizeMod, 2402 unsigned TypeQuals, Expr *E); 2403}; 2404 2405/// DependentSizedExtVectorType - This type represent an extended vector type 2406/// where either the type or size is dependent. For example: 2407/// @code 2408/// template<typename T, int Size> 2409/// class vector { 2410/// typedef T __attribute__((ext_vector_type(Size))) type; 2411/// } 2412/// @endcode 2413class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 2414 const ASTContext &Context; 2415 Expr *SizeExpr; 2416 /// ElementType - The element type of the array. 2417 QualType ElementType; 2418 SourceLocation loc; 2419 2420 DependentSizedExtVectorType(const ASTContext &Context, QualType ElementType, 2421 QualType can, Expr *SizeExpr, SourceLocation loc); 2422 2423 friend class ASTContext; 2424 2425public: 2426 Expr *getSizeExpr() const { return SizeExpr; } 2427 QualType getElementType() const { return ElementType; } 2428 SourceLocation getAttributeLoc() const { return loc; } 2429 2430 bool isSugared() const { return false; } 2431 QualType desugar() const { return QualType(this, 0); } 2432 2433 static bool classof(const Type *T) { 2434 return T->getTypeClass() == DependentSizedExtVector; 2435 } 2436 2437 void Profile(llvm::FoldingSetNodeID &ID) { 2438 Profile(ID, Context, getElementType(), getSizeExpr()); 2439 } 2440 2441 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2442 QualType ElementType, Expr *SizeExpr); 2443}; 2444 2445 2446/// VectorType - GCC generic vector type. This type is created using 2447/// __attribute__((vector_size(n)), where "n" specifies the vector size in 2448/// bytes; or from an Altivec __vector or vector declaration. 2449/// Since the constructor takes the number of vector elements, the 2450/// client is responsible for converting the size into the number of elements. 2451class VectorType : public Type, public llvm::FoldingSetNode { 2452public: 2453 enum VectorKind { 2454 GenericVector, // not a target-specific vector type 2455 AltiVecVector, // is AltiVec vector 2456 AltiVecPixel, // is AltiVec 'vector Pixel' 2457 AltiVecBool, // is AltiVec 'vector bool ...' 2458 NeonVector, // is ARM Neon vector 2459 NeonPolyVector // is ARM Neon polynomial vector 2460 }; 2461protected: 2462 /// ElementType - The element type of the vector. 2463 QualType ElementType; 2464 2465 VectorType(QualType vecType, unsigned nElements, QualType canonType, 2466 VectorKind vecKind); 2467 2468 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 2469 QualType canonType, VectorKind vecKind); 2470 2471 friend class ASTContext; // ASTContext creates these. 2472 2473public: 2474 2475 QualType getElementType() const { return ElementType; } 2476 unsigned getNumElements() const { return VectorTypeBits.NumElements; } 2477 2478 bool isSugared() const { return false; } 2479 QualType desugar() const { return QualType(this, 0); } 2480 2481 VectorKind getVectorKind() const { 2482 return VectorKind(VectorTypeBits.VecKind); 2483 } 2484 2485 void Profile(llvm::FoldingSetNodeID &ID) { 2486 Profile(ID, getElementType(), getNumElements(), 2487 getTypeClass(), getVectorKind()); 2488 } 2489 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 2490 unsigned NumElements, TypeClass TypeClass, 2491 VectorKind VecKind) { 2492 ID.AddPointer(ElementType.getAsOpaquePtr()); 2493 ID.AddInteger(NumElements); 2494 ID.AddInteger(TypeClass); 2495 ID.AddInteger(VecKind); 2496 } 2497 2498 static bool classof(const Type *T) { 2499 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 2500 } 2501}; 2502 2503/// ExtVectorType - Extended vector type. This type is created using 2504/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 2505/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 2506/// class enables syntactic extensions, like Vector Components for accessing 2507/// points, colors, and textures (modeled after OpenGL Shading Language). 2508class ExtVectorType : public VectorType { 2509 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 2510 VectorType(ExtVector, vecType, nElements, canonType, GenericVector) {} 2511 friend class ASTContext; // ASTContext creates these. 2512public: 2513 static int getPointAccessorIdx(char c) { 2514 switch (c) { 2515 default: return -1; 2516 case 'x': return 0; 2517 case 'y': return 1; 2518 case 'z': return 2; 2519 case 'w': return 3; 2520 } 2521 } 2522 static int getNumericAccessorIdx(char c) { 2523 switch (c) { 2524 default: return -1; 2525 case '0': return 0; 2526 case '1': return 1; 2527 case '2': return 2; 2528 case '3': return 3; 2529 case '4': return 4; 2530 case '5': return 5; 2531 case '6': return 6; 2532 case '7': return 7; 2533 case '8': return 8; 2534 case '9': return 9; 2535 case 'A': 2536 case 'a': return 10; 2537 case 'B': 2538 case 'b': return 11; 2539 case 'C': 2540 case 'c': return 12; 2541 case 'D': 2542 case 'd': return 13; 2543 case 'E': 2544 case 'e': return 14; 2545 case 'F': 2546 case 'f': return 15; 2547 } 2548 } 2549 2550 static int getAccessorIdx(char c) { 2551 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 2552 return getNumericAccessorIdx(c); 2553 } 2554 2555 bool isAccessorWithinNumElements(char c) const { 2556 if (int idx = getAccessorIdx(c)+1) 2557 return unsigned(idx-1) < getNumElements(); 2558 return false; 2559 } 2560 bool isSugared() const { return false; } 2561 QualType desugar() const { return QualType(this, 0); } 2562 2563 static bool classof(const Type *T) { 2564 return T->getTypeClass() == ExtVector; 2565 } 2566}; 2567 2568/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 2569/// class of FunctionNoProtoType and FunctionProtoType. 2570/// 2571class FunctionType : public Type { 2572 // The type returned by the function. 2573 QualType ResultType; 2574 2575 public: 2576 /// ExtInfo - A class which abstracts out some details necessary for 2577 /// making a call. 2578 /// 2579 /// It is not actually used directly for storing this information in 2580 /// a FunctionType, although FunctionType does currently use the 2581 /// same bit-pattern. 2582 /// 2583 // If you add a field (say Foo), other than the obvious places (both, 2584 // constructors, compile failures), what you need to update is 2585 // * Operator== 2586 // * getFoo 2587 // * withFoo 2588 // * functionType. Add Foo, getFoo. 2589 // * ASTContext::getFooType 2590 // * ASTContext::mergeFunctionTypes 2591 // * FunctionNoProtoType::Profile 2592 // * FunctionProtoType::Profile 2593 // * TypePrinter::PrintFunctionProto 2594 // * AST read and write 2595 // * Codegen 2596 class ExtInfo { 2597 // Feel free to rearrange or add bits, but if you go over 9, 2598 // you'll need to adjust both the Bits field below and 2599 // Type::FunctionTypeBitfields. 2600 2601 // | CC |noreturn|produces|regparm| 2602 // |0 .. 3| 4 | 5 | 6 .. 8| 2603 // 2604 // regparm is either 0 (no regparm attribute) or the regparm value+1. 2605 enum { CallConvMask = 0xF }; 2606 enum { NoReturnMask = 0x10 }; 2607 enum { ProducesResultMask = 0x20 }; 2608 enum { RegParmMask = ~(CallConvMask | NoReturnMask | ProducesResultMask), 2609 RegParmOffset = 6 }; // Assumed to be the last field 2610 2611 uint16_t Bits; 2612 2613 ExtInfo(unsigned Bits) : Bits(static_cast<uint16_t>(Bits)) {} 2614 2615 friend class FunctionType; 2616 2617 public: 2618 // Constructor with no defaults. Use this when you know that you 2619 // have all the elements (when reading an AST file for example). 2620 ExtInfo(bool noReturn, bool hasRegParm, unsigned regParm, CallingConv cc, 2621 bool producesResult) { 2622 assert((!hasRegParm || regParm < 7) && "Invalid regparm value"); 2623 Bits = ((unsigned) cc) | 2624 (noReturn ? NoReturnMask : 0) | 2625 (producesResult ? ProducesResultMask : 0) | 2626 (hasRegParm ? ((regParm + 1) << RegParmOffset) : 0); 2627 } 2628 2629 // Constructor with all defaults. Use when for example creating a 2630 // function know to use defaults. 2631 ExtInfo() : Bits(0) {} 2632 2633 bool getNoReturn() const { return Bits & NoReturnMask; } 2634 bool getProducesResult() const { return Bits & ProducesResultMask; } 2635 bool getHasRegParm() const { return (Bits >> RegParmOffset) != 0; } 2636 unsigned getRegParm() const { 2637 unsigned RegParm = Bits >> RegParmOffset; 2638 if (RegParm > 0) 2639 --RegParm; 2640 return RegParm; 2641 } 2642 CallingConv getCC() const { return CallingConv(Bits & CallConvMask); } 2643 2644 bool operator==(ExtInfo Other) const { 2645 return Bits == Other.Bits; 2646 } 2647 bool operator!=(ExtInfo Other) const { 2648 return Bits != Other.Bits; 2649 } 2650 2651 // Note that we don't have setters. That is by design, use 2652 // the following with methods instead of mutating these objects. 2653 2654 ExtInfo withNoReturn(bool noReturn) const { 2655 if (noReturn) 2656 return ExtInfo(Bits | NoReturnMask); 2657 else 2658 return ExtInfo(Bits & ~NoReturnMask); 2659 } 2660 2661 ExtInfo withProducesResult(bool producesResult) const { 2662 if (producesResult) 2663 return ExtInfo(Bits | ProducesResultMask); 2664 else 2665 return ExtInfo(Bits & ~ProducesResultMask); 2666 } 2667 2668 ExtInfo withRegParm(unsigned RegParm) const { 2669 assert(RegParm < 7 && "Invalid regparm value"); 2670 return ExtInfo((Bits & ~RegParmMask) | 2671 ((RegParm + 1) << RegParmOffset)); 2672 } 2673 2674 ExtInfo withCallingConv(CallingConv cc) const { 2675 return ExtInfo((Bits & ~CallConvMask) | (unsigned) cc); 2676 } 2677 2678 void Profile(llvm::FoldingSetNodeID &ID) const { 2679 ID.AddInteger(Bits); 2680 } 2681 }; 2682 2683protected: 2684 FunctionType(TypeClass tc, QualType res, 2685 unsigned typeQuals, QualType Canonical, bool Dependent, 2686 bool InstantiationDependent, 2687 bool VariablyModified, bool ContainsUnexpandedParameterPack, 2688 ExtInfo Info) 2689 : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified, 2690 ContainsUnexpandedParameterPack), 2691 ResultType(res) { 2692 FunctionTypeBits.ExtInfo = Info.Bits; 2693 FunctionTypeBits.TypeQuals = typeQuals; 2694 } 2695 unsigned getTypeQuals() const { return FunctionTypeBits.TypeQuals; } 2696 2697public: 2698 2699 QualType getResultType() const { return ResultType; } 2700 2701 bool getHasRegParm() const { return getExtInfo().getHasRegParm(); } 2702 unsigned getRegParmType() const { return getExtInfo().getRegParm(); } 2703 /// \brief Determine whether this function type includes the GNU noreturn 2704 /// attribute. The C++11 [[noreturn]] attribute does not affect the function 2705 /// type. 2706 bool getNoReturnAttr() const { return getExtInfo().getNoReturn(); } 2707 CallingConv getCallConv() const { return getExtInfo().getCC(); } 2708 ExtInfo getExtInfo() const { return ExtInfo(FunctionTypeBits.ExtInfo); } 2709 bool isConst() const { return getTypeQuals() & Qualifiers::Const; } 2710 bool isVolatile() const { return getTypeQuals() & Qualifiers::Volatile; } 2711 bool isRestrict() const { return getTypeQuals() & Qualifiers::Restrict; } 2712 2713 /// \brief Determine the type of an expression that calls a function of 2714 /// this type. 2715 QualType getCallResultType(ASTContext &Context) const { 2716 return getResultType().getNonLValueExprType(Context); 2717 } 2718 2719 static StringRef getNameForCallConv(CallingConv CC); 2720 2721 static bool classof(const Type *T) { 2722 return T->getTypeClass() == FunctionNoProto || 2723 T->getTypeClass() == FunctionProto; 2724 } 2725}; 2726 2727/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 2728/// no information available about its arguments. 2729class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 2730 FunctionNoProtoType(QualType Result, QualType Canonical, ExtInfo Info) 2731 : FunctionType(FunctionNoProto, Result, 0, Canonical, 2732 /*Dependent=*/false, /*InstantiationDependent=*/false, 2733 Result->isVariablyModifiedType(), 2734 /*ContainsUnexpandedParameterPack=*/false, Info) {} 2735 2736 friend class ASTContext; // ASTContext creates these. 2737 2738public: 2739 // No additional state past what FunctionType provides. 2740 2741 bool isSugared() const { return false; } 2742 QualType desugar() const { return QualType(this, 0); } 2743 2744 void Profile(llvm::FoldingSetNodeID &ID) { 2745 Profile(ID, getResultType(), getExtInfo()); 2746 } 2747 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 2748 ExtInfo Info) { 2749 Info.Profile(ID); 2750 ID.AddPointer(ResultType.getAsOpaquePtr()); 2751 } 2752 2753 static bool classof(const Type *T) { 2754 return T->getTypeClass() == FunctionNoProto; 2755 } 2756}; 2757 2758/// FunctionProtoType - Represents a prototype with argument type info, e.g. 2759/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 2760/// arguments, not as having a single void argument. Such a type can have an 2761/// exception specification, but this specification is not part of the canonical 2762/// type. 2763class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 2764public: 2765 /// ExtProtoInfo - Extra information about a function prototype. 2766 struct ExtProtoInfo { 2767 ExtProtoInfo() : 2768 Variadic(false), HasTrailingReturn(false), TypeQuals(0), 2769 ExceptionSpecType(EST_None), RefQualifier(RQ_None), 2770 NumExceptions(0), Exceptions(0), NoexceptExpr(0), 2771 ExceptionSpecDecl(0), ExceptionSpecTemplate(0), 2772 ConsumedArguments(0) {} 2773 2774 FunctionType::ExtInfo ExtInfo; 2775 bool Variadic : 1; 2776 bool HasTrailingReturn : 1; 2777 unsigned char TypeQuals; 2778 ExceptionSpecificationType ExceptionSpecType; 2779 RefQualifierKind RefQualifier; 2780 unsigned NumExceptions; 2781 const QualType *Exceptions; 2782 Expr *NoexceptExpr; 2783 FunctionDecl *ExceptionSpecDecl; 2784 FunctionDecl *ExceptionSpecTemplate; 2785 const bool *ConsumedArguments; 2786 }; 2787 2788private: 2789 /// \brief Determine whether there are any argument types that 2790 /// contain an unexpanded parameter pack. 2791 static bool containsAnyUnexpandedParameterPack(const QualType *ArgArray, 2792 unsigned numArgs) { 2793 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 2794 if (ArgArray[Idx]->containsUnexpandedParameterPack()) 2795 return true; 2796 2797 return false; 2798 } 2799 2800 FunctionProtoType(QualType result, ArrayRef<QualType> args, 2801 QualType canonical, const ExtProtoInfo &epi); 2802 2803 /// NumArgs - The number of arguments this function has, not counting '...'. 2804 unsigned NumArgs : 15; 2805 2806 /// NumExceptions - The number of types in the exception spec, if any. 2807 unsigned NumExceptions : 9; 2808 2809 /// ExceptionSpecType - The type of exception specification this function has. 2810 unsigned ExceptionSpecType : 3; 2811 2812 /// HasAnyConsumedArgs - Whether this function has any consumed arguments. 2813 unsigned HasAnyConsumedArgs : 1; 2814 2815 /// Variadic - Whether the function is variadic. 2816 unsigned Variadic : 1; 2817 2818 /// HasTrailingReturn - Whether this function has a trailing return type. 2819 unsigned HasTrailingReturn : 1; 2820 2821 /// \brief The ref-qualifier associated with a \c FunctionProtoType. 2822 /// 2823 /// This is a value of type \c RefQualifierKind. 2824 unsigned RefQualifier : 2; 2825 2826 // ArgInfo - There is an variable size array after the class in memory that 2827 // holds the argument types. 2828 2829 // Exceptions - There is another variable size array after ArgInfo that 2830 // holds the exception types. 2831 2832 // NoexceptExpr - Instead of Exceptions, there may be a single Expr* pointing 2833 // to the expression in the noexcept() specifier. 2834 2835 // ExceptionSpecDecl, ExceptionSpecTemplate - Instead of Exceptions, there may 2836 // be a pair of FunctionDecl* pointing to the function which should be used to 2837 // instantiate this function type's exception specification, and the function 2838 // from which it should be instantiated. 2839 2840 // ConsumedArgs - A variable size array, following Exceptions 2841 // and of length NumArgs, holding flags indicating which arguments 2842 // are consumed. This only appears if HasAnyConsumedArgs is true. 2843 2844 friend class ASTContext; // ASTContext creates these. 2845 2846 const bool *getConsumedArgsBuffer() const { 2847 assert(hasAnyConsumedArgs()); 2848 2849 // Find the end of the exceptions. 2850 Expr * const *eh_end = reinterpret_cast<Expr * const *>(arg_type_end()); 2851 if (getExceptionSpecType() != EST_ComputedNoexcept) 2852 eh_end += NumExceptions; 2853 else 2854 eh_end += 1; // NoexceptExpr 2855 2856 return reinterpret_cast<const bool*>(eh_end); 2857 } 2858 2859public: 2860 unsigned getNumArgs() const { return NumArgs; } 2861 QualType getArgType(unsigned i) const { 2862 assert(i < NumArgs && "Invalid argument number!"); 2863 return arg_type_begin()[i]; 2864 } 2865 2866 ExtProtoInfo getExtProtoInfo() const { 2867 ExtProtoInfo EPI; 2868 EPI.ExtInfo = getExtInfo(); 2869 EPI.Variadic = isVariadic(); 2870 EPI.HasTrailingReturn = hasTrailingReturn(); 2871 EPI.ExceptionSpecType = getExceptionSpecType(); 2872 EPI.TypeQuals = static_cast<unsigned char>(getTypeQuals()); 2873 EPI.RefQualifier = getRefQualifier(); 2874 if (EPI.ExceptionSpecType == EST_Dynamic) { 2875 EPI.NumExceptions = NumExceptions; 2876 EPI.Exceptions = exception_begin(); 2877 } else if (EPI.ExceptionSpecType == EST_ComputedNoexcept) { 2878 EPI.NoexceptExpr = getNoexceptExpr(); 2879 } else if (EPI.ExceptionSpecType == EST_Uninstantiated) { 2880 EPI.ExceptionSpecDecl = getExceptionSpecDecl(); 2881 EPI.ExceptionSpecTemplate = getExceptionSpecTemplate(); 2882 } else if (EPI.ExceptionSpecType == EST_Unevaluated) { 2883 EPI.ExceptionSpecDecl = getExceptionSpecDecl(); 2884 } 2885 if (hasAnyConsumedArgs()) 2886 EPI.ConsumedArguments = getConsumedArgsBuffer(); 2887 return EPI; 2888 } 2889 2890 /// \brief Get the kind of exception specification on this function. 2891 ExceptionSpecificationType getExceptionSpecType() const { 2892 return static_cast<ExceptionSpecificationType>(ExceptionSpecType); 2893 } 2894 /// \brief Return whether this function has any kind of exception spec. 2895 bool hasExceptionSpec() const { 2896 return getExceptionSpecType() != EST_None; 2897 } 2898 /// \brief Return whether this function has a dynamic (throw) exception spec. 2899 bool hasDynamicExceptionSpec() const { 2900 return isDynamicExceptionSpec(getExceptionSpecType()); 2901 } 2902 /// \brief Return whether this function has a noexcept exception spec. 2903 bool hasNoexceptExceptionSpec() const { 2904 return isNoexceptExceptionSpec(getExceptionSpecType()); 2905 } 2906 /// \brief Result type of getNoexceptSpec(). 2907 enum NoexceptResult { 2908 NR_NoNoexcept, ///< There is no noexcept specifier. 2909 NR_BadNoexcept, ///< The noexcept specifier has a bad expression. 2910 NR_Dependent, ///< The noexcept specifier is dependent. 2911 NR_Throw, ///< The noexcept specifier evaluates to false. 2912 NR_Nothrow ///< The noexcept specifier evaluates to true. 2913 }; 2914 /// \brief Get the meaning of the noexcept spec on this function, if any. 2915 NoexceptResult getNoexceptSpec(ASTContext &Ctx) const; 2916 unsigned getNumExceptions() const { return NumExceptions; } 2917 QualType getExceptionType(unsigned i) const { 2918 assert(i < NumExceptions && "Invalid exception number!"); 2919 return exception_begin()[i]; 2920 } 2921 Expr *getNoexceptExpr() const { 2922 if (getExceptionSpecType() != EST_ComputedNoexcept) 2923 return 0; 2924 // NoexceptExpr sits where the arguments end. 2925 return *reinterpret_cast<Expr *const *>(arg_type_end()); 2926 } 2927 /// \brief If this function type has an exception specification which hasn't 2928 /// been determined yet (either because it has not been evaluated or because 2929 /// it has not been instantiated), this is the function whose exception 2930 /// specification is represented by this type. 2931 FunctionDecl *getExceptionSpecDecl() const { 2932 if (getExceptionSpecType() != EST_Uninstantiated && 2933 getExceptionSpecType() != EST_Unevaluated) 2934 return 0; 2935 return reinterpret_cast<FunctionDecl * const *>(arg_type_end())[0]; 2936 } 2937 /// \brief If this function type has an uninstantiated exception 2938 /// specification, this is the function whose exception specification 2939 /// should be instantiated to find the exception specification for 2940 /// this type. 2941 FunctionDecl *getExceptionSpecTemplate() const { 2942 if (getExceptionSpecType() != EST_Uninstantiated) 2943 return 0; 2944 return reinterpret_cast<FunctionDecl * const *>(arg_type_end())[1]; 2945 } 2946 bool isNothrow(ASTContext &Ctx) const { 2947 ExceptionSpecificationType EST = getExceptionSpecType(); 2948 assert(EST != EST_Unevaluated && EST != EST_Uninstantiated); 2949 if (EST == EST_DynamicNone || EST == EST_BasicNoexcept) 2950 return true; 2951 if (EST != EST_ComputedNoexcept) 2952 return false; 2953 return getNoexceptSpec(Ctx) == NR_Nothrow; 2954 } 2955 2956 bool isVariadic() const { return Variadic; } 2957 2958 /// \brief Determines whether this function prototype contains a 2959 /// parameter pack at the end. 2960 /// 2961 /// A function template whose last parameter is a parameter pack can be 2962 /// called with an arbitrary number of arguments, much like a variadic 2963 /// function. 2964 bool isTemplateVariadic() const; 2965 2966 bool hasTrailingReturn() const { return HasTrailingReturn; } 2967 2968 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 2969 2970 2971 /// \brief Retrieve the ref-qualifier associated with this function type. 2972 RefQualifierKind getRefQualifier() const { 2973 return static_cast<RefQualifierKind>(RefQualifier); 2974 } 2975 2976 typedef const QualType *arg_type_iterator; 2977 arg_type_iterator arg_type_begin() const { 2978 return reinterpret_cast<const QualType *>(this+1); 2979 } 2980 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 2981 2982 typedef const QualType *exception_iterator; 2983 exception_iterator exception_begin() const { 2984 // exceptions begin where arguments end 2985 return arg_type_end(); 2986 } 2987 exception_iterator exception_end() const { 2988 if (getExceptionSpecType() != EST_Dynamic) 2989 return exception_begin(); 2990 return exception_begin() + NumExceptions; 2991 } 2992 2993 bool hasAnyConsumedArgs() const { 2994 return HasAnyConsumedArgs; 2995 } 2996 bool isArgConsumed(unsigned I) const { 2997 assert(I < getNumArgs() && "argument index out of range!"); 2998 if (hasAnyConsumedArgs()) 2999 return getConsumedArgsBuffer()[I]; 3000 return false; 3001 } 3002 3003 bool isSugared() const { return false; } 3004 QualType desugar() const { return QualType(this, 0); } 3005 3006 void printExceptionSpecification(raw_ostream &OS, 3007 const PrintingPolicy &Policy) const; 3008 3009 static bool classof(const Type *T) { 3010 return T->getTypeClass() == FunctionProto; 3011 } 3012 3013 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx); 3014 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 3015 arg_type_iterator ArgTys, unsigned NumArgs, 3016 const ExtProtoInfo &EPI, const ASTContext &Context); 3017}; 3018 3019 3020/// \brief Represents the dependent type named by a dependently-scoped 3021/// typename using declaration, e.g. 3022/// using typename Base<T>::foo; 3023/// Template instantiation turns these into the underlying type. 3024class UnresolvedUsingType : public Type { 3025 UnresolvedUsingTypenameDecl *Decl; 3026 3027 UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) 3028 : Type(UnresolvedUsing, QualType(), true, true, false, 3029 /*ContainsUnexpandedParameterPack=*/false), 3030 Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} 3031 friend class ASTContext; // ASTContext creates these. 3032public: 3033 3034 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 3035 3036 bool isSugared() const { return false; } 3037 QualType desugar() const { return QualType(this, 0); } 3038 3039 static bool classof(const Type *T) { 3040 return T->getTypeClass() == UnresolvedUsing; 3041 } 3042 3043 void Profile(llvm::FoldingSetNodeID &ID) { 3044 return Profile(ID, Decl); 3045 } 3046 static void Profile(llvm::FoldingSetNodeID &ID, 3047 UnresolvedUsingTypenameDecl *D) { 3048 ID.AddPointer(D); 3049 } 3050}; 3051 3052 3053class TypedefType : public Type { 3054 TypedefNameDecl *Decl; 3055protected: 3056 TypedefType(TypeClass tc, const TypedefNameDecl *D, QualType can) 3057 : Type(tc, can, can->isDependentType(), 3058 can->isInstantiationDependentType(), 3059 can->isVariablyModifiedType(), 3060 /*ContainsUnexpandedParameterPack=*/false), 3061 Decl(const_cast<TypedefNameDecl*>(D)) { 3062 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 3063 } 3064 friend class ASTContext; // ASTContext creates these. 3065public: 3066 3067 TypedefNameDecl *getDecl() const { return Decl; } 3068 3069 bool isSugared() const { return true; } 3070 QualType desugar() const; 3071 3072 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 3073}; 3074 3075/// TypeOfExprType (GCC extension). 3076class TypeOfExprType : public Type { 3077 Expr *TOExpr; 3078 3079protected: 3080 TypeOfExprType(Expr *E, QualType can = QualType()); 3081 friend class ASTContext; // ASTContext creates these. 3082public: 3083 Expr *getUnderlyingExpr() const { return TOExpr; } 3084 3085 /// \brief Remove a single level of sugar. 3086 QualType desugar() const; 3087 3088 /// \brief Returns whether this type directly provides sugar. 3089 bool isSugared() const; 3090 3091 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 3092}; 3093 3094/// \brief Internal representation of canonical, dependent 3095/// typeof(expr) types. 3096/// 3097/// This class is used internally by the ASTContext to manage 3098/// canonical, dependent types, only. Clients will only see instances 3099/// of this class via TypeOfExprType nodes. 3100class DependentTypeOfExprType 3101 : public TypeOfExprType, public llvm::FoldingSetNode { 3102 const ASTContext &Context; 3103 3104public: 3105 DependentTypeOfExprType(const ASTContext &Context, Expr *E) 3106 : TypeOfExprType(E), Context(Context) { } 3107 3108 void Profile(llvm::FoldingSetNodeID &ID) { 3109 Profile(ID, Context, getUnderlyingExpr()); 3110 } 3111 3112 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 3113 Expr *E); 3114}; 3115 3116/// TypeOfType (GCC extension). 3117class TypeOfType : public Type { 3118 QualType TOType; 3119 TypeOfType(QualType T, QualType can) 3120 : Type(TypeOf, can, T->isDependentType(), 3121 T->isInstantiationDependentType(), 3122 T->isVariablyModifiedType(), 3123 T->containsUnexpandedParameterPack()), 3124 TOType(T) { 3125 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 3126 } 3127 friend class ASTContext; // ASTContext creates these. 3128public: 3129 QualType getUnderlyingType() const { return TOType; } 3130 3131 /// \brief Remove a single level of sugar. 3132 QualType desugar() const { return getUnderlyingType(); } 3133 3134 /// \brief Returns whether this type directly provides sugar. 3135 bool isSugared() const { return true; } 3136 3137 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 3138}; 3139 3140/// DecltypeType (C++0x) 3141class DecltypeType : public Type { 3142 Expr *E; 3143 QualType UnderlyingType; 3144 3145protected: 3146 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 3147 friend class ASTContext; // ASTContext creates these. 3148public: 3149 Expr *getUnderlyingExpr() const { return E; } 3150 QualType getUnderlyingType() const { return UnderlyingType; } 3151 3152 /// \brief Remove a single level of sugar. 3153 QualType desugar() const; 3154 3155 /// \brief Returns whether this type directly provides sugar. 3156 bool isSugared() const; 3157 3158 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 3159}; 3160 3161/// \brief Internal representation of canonical, dependent 3162/// decltype(expr) types. 3163/// 3164/// This class is used internally by the ASTContext to manage 3165/// canonical, dependent types, only. Clients will only see instances 3166/// of this class via DecltypeType nodes. 3167class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 3168 const ASTContext &Context; 3169 3170public: 3171 DependentDecltypeType(const ASTContext &Context, Expr *E); 3172 3173 void Profile(llvm::FoldingSetNodeID &ID) { 3174 Profile(ID, Context, getUnderlyingExpr()); 3175 } 3176 3177 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 3178 Expr *E); 3179}; 3180 3181/// \brief A unary type transform, which is a type constructed from another 3182class UnaryTransformType : public Type { 3183public: 3184 enum UTTKind { 3185 EnumUnderlyingType 3186 }; 3187 3188private: 3189 /// The untransformed type. 3190 QualType BaseType; 3191 /// The transformed type if not dependent, otherwise the same as BaseType. 3192 QualType UnderlyingType; 3193 3194 UTTKind UKind; 3195protected: 3196 UnaryTransformType(QualType BaseTy, QualType UnderlyingTy, UTTKind UKind, 3197 QualType CanonicalTy); 3198 friend class ASTContext; 3199public: 3200 bool isSugared() const { return !isDependentType(); } 3201 QualType desugar() const { return UnderlyingType; } 3202 3203 QualType getUnderlyingType() const { return UnderlyingType; } 3204 QualType getBaseType() const { return BaseType; } 3205 3206 UTTKind getUTTKind() const { return UKind; } 3207 3208 static bool classof(const Type *T) { 3209 return T->getTypeClass() == UnaryTransform; 3210 } 3211}; 3212 3213class TagType : public Type { 3214 /// Stores the TagDecl associated with this type. The decl may point to any 3215 /// TagDecl that declares the entity. 3216 TagDecl * decl; 3217 3218 friend class ASTReader; 3219 3220protected: 3221 TagType(TypeClass TC, const TagDecl *D, QualType can); 3222 3223public: 3224 TagDecl *getDecl() const; 3225 3226 /// @brief Determines whether this type is in the process of being 3227 /// defined. 3228 bool isBeingDefined() const; 3229 3230 static bool classof(const Type *T) { 3231 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 3232 } 3233}; 3234 3235/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 3236/// to detect TagType objects of structs/unions/classes. 3237class RecordType : public TagType { 3238protected: 3239 explicit RecordType(const RecordDecl *D) 3240 : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3241 explicit RecordType(TypeClass TC, RecordDecl *D) 3242 : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3243 friend class ASTContext; // ASTContext creates these. 3244public: 3245 3246 RecordDecl *getDecl() const { 3247 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 3248 } 3249 3250 // FIXME: This predicate is a helper to QualType/Type. It needs to 3251 // recursively check all fields for const-ness. If any field is declared 3252 // const, it needs to return false. 3253 bool hasConstFields() const { return false; } 3254 3255 bool isSugared() const { return false; } 3256 QualType desugar() const { return QualType(this, 0); } 3257 3258 static bool classof(const Type *T) { return T->getTypeClass() == Record; } 3259}; 3260 3261/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 3262/// to detect TagType objects of enums. 3263class EnumType : public TagType { 3264 explicit EnumType(const EnumDecl *D) 3265 : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3266 friend class ASTContext; // ASTContext creates these. 3267public: 3268 3269 EnumDecl *getDecl() const { 3270 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 3271 } 3272 3273 bool isSugared() const { return false; } 3274 QualType desugar() const { return QualType(this, 0); } 3275 3276 static bool classof(const Type *T) { return T->getTypeClass() == Enum; } 3277}; 3278 3279/// AttributedType - An attributed type is a type to which a type 3280/// attribute has been applied. The "modified type" is the 3281/// fully-sugared type to which the attributed type was applied; 3282/// generally it is not canonically equivalent to the attributed type. 3283/// The "equivalent type" is the minimally-desugared type which the 3284/// type is canonically equivalent to. 3285/// 3286/// For example, in the following attributed type: 3287/// int32_t __attribute__((vector_size(16))) 3288/// - the modified type is the TypedefType for int32_t 3289/// - the equivalent type is VectorType(16, int32_t) 3290/// - the canonical type is VectorType(16, int) 3291class AttributedType : public Type, public llvm::FoldingSetNode { 3292public: 3293 // It is really silly to have yet another attribute-kind enum, but 3294 // clang::attr::Kind doesn't currently cover the pure type attrs. 3295 enum Kind { 3296 // Expression operand. 3297 attr_address_space, 3298 attr_regparm, 3299 attr_vector_size, 3300 attr_neon_vector_type, 3301 attr_neon_polyvector_type, 3302 3303 FirstExprOperandKind = attr_address_space, 3304 LastExprOperandKind = attr_neon_polyvector_type, 3305 3306 // Enumerated operand (string or keyword). 3307 attr_objc_gc, 3308 attr_objc_ownership, 3309 attr_pcs, 3310 3311 FirstEnumOperandKind = attr_objc_gc, 3312 LastEnumOperandKind = attr_pcs, 3313 3314 // No operand. 3315 attr_noreturn, 3316 attr_cdecl, 3317 attr_fastcall, 3318 attr_stdcall, 3319 attr_thiscall, 3320 attr_pascal, 3321 attr_pnaclcall, 3322 attr_inteloclbicc 3323 }; 3324 3325private: 3326 QualType ModifiedType; 3327 QualType EquivalentType; 3328 3329 friend class ASTContext; // creates these 3330 3331 AttributedType(QualType canon, Kind attrKind, 3332 QualType modified, QualType equivalent) 3333 : Type(Attributed, canon, canon->isDependentType(), 3334 canon->isInstantiationDependentType(), 3335 canon->isVariablyModifiedType(), 3336 canon->containsUnexpandedParameterPack()), 3337 ModifiedType(modified), EquivalentType(equivalent) { 3338 AttributedTypeBits.AttrKind = attrKind; 3339 } 3340 3341public: 3342 Kind getAttrKind() const { 3343 return static_cast<Kind>(AttributedTypeBits.AttrKind); 3344 } 3345 3346 QualType getModifiedType() const { return ModifiedType; } 3347 QualType getEquivalentType() const { return EquivalentType; } 3348 3349 bool isSugared() const { return true; } 3350 QualType desugar() const { return getEquivalentType(); } 3351 3352 void Profile(llvm::FoldingSetNodeID &ID) { 3353 Profile(ID, getAttrKind(), ModifiedType, EquivalentType); 3354 } 3355 3356 static void Profile(llvm::FoldingSetNodeID &ID, Kind attrKind, 3357 QualType modified, QualType equivalent) { 3358 ID.AddInteger(attrKind); 3359 ID.AddPointer(modified.getAsOpaquePtr()); 3360 ID.AddPointer(equivalent.getAsOpaquePtr()); 3361 } 3362 3363 static bool classof(const Type *T) { 3364 return T->getTypeClass() == Attributed; 3365 } 3366}; 3367 3368class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 3369 // Helper data collector for canonical types. 3370 struct CanonicalTTPTInfo { 3371 unsigned Depth : 15; 3372 unsigned ParameterPack : 1; 3373 unsigned Index : 16; 3374 }; 3375 3376 union { 3377 // Info for the canonical type. 3378 CanonicalTTPTInfo CanTTPTInfo; 3379 // Info for the non-canonical type. 3380 TemplateTypeParmDecl *TTPDecl; 3381 }; 3382 3383 /// Build a non-canonical type. 3384 TemplateTypeParmType(TemplateTypeParmDecl *TTPDecl, QualType Canon) 3385 : Type(TemplateTypeParm, Canon, /*Dependent=*/true, 3386 /*InstantiationDependent=*/true, 3387 /*VariablyModified=*/false, 3388 Canon->containsUnexpandedParameterPack()), 3389 TTPDecl(TTPDecl) { } 3390 3391 /// Build the canonical type. 3392 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 3393 : Type(TemplateTypeParm, QualType(this, 0), 3394 /*Dependent=*/true, 3395 /*InstantiationDependent=*/true, 3396 /*VariablyModified=*/false, PP) { 3397 CanTTPTInfo.Depth = D; 3398 CanTTPTInfo.Index = I; 3399 CanTTPTInfo.ParameterPack = PP; 3400 } 3401 3402 friend class ASTContext; // ASTContext creates these 3403 3404 const CanonicalTTPTInfo& getCanTTPTInfo() const { 3405 QualType Can = getCanonicalTypeInternal(); 3406 return Can->castAs<TemplateTypeParmType>()->CanTTPTInfo; 3407 } 3408 3409public: 3410 unsigned getDepth() const { return getCanTTPTInfo().Depth; } 3411 unsigned getIndex() const { return getCanTTPTInfo().Index; } 3412 bool isParameterPack() const { return getCanTTPTInfo().ParameterPack; } 3413 3414 TemplateTypeParmDecl *getDecl() const { 3415 return isCanonicalUnqualified() ? 0 : TTPDecl; 3416 } 3417 3418 IdentifierInfo *getIdentifier() const; 3419 3420 bool isSugared() const { return false; } 3421 QualType desugar() const { return QualType(this, 0); } 3422 3423 void Profile(llvm::FoldingSetNodeID &ID) { 3424 Profile(ID, getDepth(), getIndex(), isParameterPack(), getDecl()); 3425 } 3426 3427 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 3428 unsigned Index, bool ParameterPack, 3429 TemplateTypeParmDecl *TTPDecl) { 3430 ID.AddInteger(Depth); 3431 ID.AddInteger(Index); 3432 ID.AddBoolean(ParameterPack); 3433 ID.AddPointer(TTPDecl); 3434 } 3435 3436 static bool classof(const Type *T) { 3437 return T->getTypeClass() == TemplateTypeParm; 3438 } 3439}; 3440 3441/// \brief Represents the result of substituting a type for a template 3442/// type parameter. 3443/// 3444/// Within an instantiated template, all template type parameters have 3445/// been replaced with these. They are used solely to record that a 3446/// type was originally written as a template type parameter; 3447/// therefore they are never canonical. 3448class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 3449 // The original type parameter. 3450 const TemplateTypeParmType *Replaced; 3451 3452 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 3453 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType(), 3454 Canon->isInstantiationDependentType(), 3455 Canon->isVariablyModifiedType(), 3456 Canon->containsUnexpandedParameterPack()), 3457 Replaced(Param) { } 3458 3459 friend class ASTContext; 3460 3461public: 3462 /// Gets the template parameter that was substituted for. 3463 const TemplateTypeParmType *getReplacedParameter() const { 3464 return Replaced; 3465 } 3466 3467 /// Gets the type that was substituted for the template 3468 /// parameter. 3469 QualType getReplacementType() const { 3470 return getCanonicalTypeInternal(); 3471 } 3472 3473 bool isSugared() const { return true; } 3474 QualType desugar() const { return getReplacementType(); } 3475 3476 void Profile(llvm::FoldingSetNodeID &ID) { 3477 Profile(ID, getReplacedParameter(), getReplacementType()); 3478 } 3479 static void Profile(llvm::FoldingSetNodeID &ID, 3480 const TemplateTypeParmType *Replaced, 3481 QualType Replacement) { 3482 ID.AddPointer(Replaced); 3483 ID.AddPointer(Replacement.getAsOpaquePtr()); 3484 } 3485 3486 static bool classof(const Type *T) { 3487 return T->getTypeClass() == SubstTemplateTypeParm; 3488 } 3489}; 3490 3491/// \brief Represents the result of substituting a set of types for a template 3492/// type parameter pack. 3493/// 3494/// When a pack expansion in the source code contains multiple parameter packs 3495/// and those parameter packs correspond to different levels of template 3496/// parameter lists, this type node is used to represent a template type 3497/// parameter pack from an outer level, which has already had its argument pack 3498/// substituted but that still lives within a pack expansion that itself 3499/// could not be instantiated. When actually performing a substitution into 3500/// that pack expansion (e.g., when all template parameters have corresponding 3501/// arguments), this type will be replaced with the \c SubstTemplateTypeParmType 3502/// at the current pack substitution index. 3503class SubstTemplateTypeParmPackType : public Type, public llvm::FoldingSetNode { 3504 /// \brief The original type parameter. 3505 const TemplateTypeParmType *Replaced; 3506 3507 /// \brief A pointer to the set of template arguments that this 3508 /// parameter pack is instantiated with. 3509 const TemplateArgument *Arguments; 3510 3511 /// \brief The number of template arguments in \c Arguments. 3512 unsigned NumArguments; 3513 3514 SubstTemplateTypeParmPackType(const TemplateTypeParmType *Param, 3515 QualType Canon, 3516 const TemplateArgument &ArgPack); 3517 3518 friend class ASTContext; 3519 3520public: 3521 IdentifierInfo *getIdentifier() const { return Replaced->getIdentifier(); } 3522 3523 /// Gets the template parameter that was substituted for. 3524 const TemplateTypeParmType *getReplacedParameter() const { 3525 return Replaced; 3526 } 3527 3528 bool isSugared() const { return false; } 3529 QualType desugar() const { return QualType(this, 0); } 3530 3531 TemplateArgument getArgumentPack() const; 3532 3533 void Profile(llvm::FoldingSetNodeID &ID); 3534 static void Profile(llvm::FoldingSetNodeID &ID, 3535 const TemplateTypeParmType *Replaced, 3536 const TemplateArgument &ArgPack); 3537 3538 static bool classof(const Type *T) { 3539 return T->getTypeClass() == SubstTemplateTypeParmPack; 3540 } 3541}; 3542 3543/// \brief Represents a C++0x auto type. 3544/// 3545/// These types are usually a placeholder for a deduced type. However, within 3546/// templates and before the initializer is attached, there is no deduced type 3547/// and an auto type is type-dependent and canonical. 3548class AutoType : public Type, public llvm::FoldingSetNode { 3549 AutoType(QualType DeducedType) 3550 : Type(Auto, DeducedType.isNull() ? QualType(this, 0) : DeducedType, 3551 /*Dependent=*/DeducedType.isNull(), 3552 /*InstantiationDependent=*/DeducedType.isNull(), 3553 /*VariablyModified=*/false, /*ContainsParameterPack=*/false) { 3554 assert((DeducedType.isNull() || !DeducedType->isDependentType()) && 3555 "deduced a dependent type for auto"); 3556 } 3557 3558 friend class ASTContext; // ASTContext creates these 3559 3560public: 3561 bool isSugared() const { return isDeduced(); } 3562 QualType desugar() const { return getCanonicalTypeInternal(); } 3563 3564 QualType getDeducedType() const { 3565 return isDeduced() ? getCanonicalTypeInternal() : QualType(); 3566 } 3567 bool isDeduced() const { 3568 return !isDependentType(); 3569 } 3570 3571 void Profile(llvm::FoldingSetNodeID &ID) { 3572 Profile(ID, getDeducedType()); 3573 } 3574 3575 static void Profile(llvm::FoldingSetNodeID &ID, 3576 QualType Deduced) { 3577 ID.AddPointer(Deduced.getAsOpaquePtr()); 3578 } 3579 3580 static bool classof(const Type *T) { 3581 return T->getTypeClass() == Auto; 3582 } 3583}; 3584 3585/// \brief Represents a type template specialization; the template 3586/// must be a class template, a type alias template, or a template 3587/// template parameter. A template which cannot be resolved to one of 3588/// these, e.g. because it is written with a dependent scope 3589/// specifier, is instead represented as a 3590/// @c DependentTemplateSpecializationType. 3591/// 3592/// A non-dependent template specialization type is always "sugar", 3593/// typically for a @c RecordType. For example, a class template 3594/// specialization type of @c vector<int> will refer to a tag type for 3595/// the instantiation @c std::vector<int, std::allocator<int>> 3596/// 3597/// Template specializations are dependent if either the template or 3598/// any of the template arguments are dependent, in which case the 3599/// type may also be canonical. 3600/// 3601/// Instances of this type are allocated with a trailing array of 3602/// TemplateArguments, followed by a QualType representing the 3603/// non-canonical aliased type when the template is a type alias 3604/// template. 3605class TemplateSpecializationType 3606 : public Type, public llvm::FoldingSetNode { 3607 /// \brief The name of the template being specialized. This is 3608 /// either a TemplateName::Template (in which case it is a 3609 /// ClassTemplateDecl*, a TemplateTemplateParmDecl*, or a 3610 /// TypeAliasTemplateDecl*), a 3611 /// TemplateName::SubstTemplateTemplateParmPack, or a 3612 /// TemplateName::SubstTemplateTemplateParm (in which case the 3613 /// replacement must, recursively, be one of these). 3614 TemplateName Template; 3615 3616 /// \brief - The number of template arguments named in this class 3617 /// template specialization. 3618 unsigned NumArgs : 31; 3619 3620 /// \brief Whether this template specialization type is a substituted 3621 /// type alias. 3622 bool TypeAlias : 1; 3623 3624 TemplateSpecializationType(TemplateName T, 3625 const TemplateArgument *Args, 3626 unsigned NumArgs, QualType Canon, 3627 QualType Aliased); 3628 3629 friend class ASTContext; // ASTContext creates these 3630 3631public: 3632 /// \brief Determine whether any of the given template arguments are 3633 /// dependent. 3634 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 3635 unsigned NumArgs, 3636 bool &InstantiationDependent); 3637 3638 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 3639 unsigned NumArgs, 3640 bool &InstantiationDependent); 3641 3642 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &, 3643 bool &InstantiationDependent); 3644 3645 /// \brief Print a template argument list, including the '<' and '>' 3646 /// enclosing the template arguments. 3647 static void PrintTemplateArgumentList(raw_ostream &OS, 3648 const TemplateArgument *Args, 3649 unsigned NumArgs, 3650 const PrintingPolicy &Policy, 3651 bool SkipBrackets = false); 3652 3653 static void PrintTemplateArgumentList(raw_ostream &OS, 3654 const TemplateArgumentLoc *Args, 3655 unsigned NumArgs, 3656 const PrintingPolicy &Policy); 3657 3658 static void PrintTemplateArgumentList(raw_ostream &OS, 3659 const TemplateArgumentListInfo &, 3660 const PrintingPolicy &Policy); 3661 3662 /// True if this template specialization type matches a current 3663 /// instantiation in the context in which it is found. 3664 bool isCurrentInstantiation() const { 3665 return isa<InjectedClassNameType>(getCanonicalTypeInternal()); 3666 } 3667 3668 /// \brief Determine if this template specialization type is for a type alias 3669 /// template that has been substituted. 3670 /// 3671 /// Nearly every template specialization type whose template is an alias 3672 /// template will be substituted. However, this is not the case when 3673 /// the specialization contains a pack expansion but the template alias 3674 /// does not have a corresponding parameter pack, e.g., 3675 /// 3676 /// \code 3677 /// template<typename T, typename U, typename V> struct S; 3678 /// template<typename T, typename U> using A = S<T, int, U>; 3679 /// template<typename... Ts> struct X { 3680 /// typedef A<Ts...> type; // not a type alias 3681 /// }; 3682 /// \endcode 3683 bool isTypeAlias() const { return TypeAlias; } 3684 3685 /// Get the aliased type, if this is a specialization of a type alias 3686 /// template. 3687 QualType getAliasedType() const { 3688 assert(isTypeAlias() && "not a type alias template specialization"); 3689 return *reinterpret_cast<const QualType*>(end()); 3690 } 3691 3692 typedef const TemplateArgument * iterator; 3693 3694 iterator begin() const { return getArgs(); } 3695 iterator end() const; // defined inline in TemplateBase.h 3696 3697 /// \brief Retrieve the name of the template that we are specializing. 3698 TemplateName getTemplateName() const { return Template; } 3699 3700 /// \brief Retrieve the template arguments. 3701 const TemplateArgument *getArgs() const { 3702 return reinterpret_cast<const TemplateArgument *>(this + 1); 3703 } 3704 3705 /// \brief Retrieve the number of template arguments. 3706 unsigned getNumArgs() const { return NumArgs; } 3707 3708 /// \brief Retrieve a specific template argument as a type. 3709 /// \pre @c isArgType(Arg) 3710 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 3711 3712 bool isSugared() const { 3713 return !isDependentType() || isCurrentInstantiation() || isTypeAlias(); 3714 } 3715 QualType desugar() const { return getCanonicalTypeInternal(); } 3716 3717 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) { 3718 Profile(ID, Template, getArgs(), NumArgs, Ctx); 3719 if (isTypeAlias()) 3720 getAliasedType().Profile(ID); 3721 } 3722 3723 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 3724 const TemplateArgument *Args, 3725 unsigned NumArgs, 3726 const ASTContext &Context); 3727 3728 static bool classof(const Type *T) { 3729 return T->getTypeClass() == TemplateSpecialization; 3730 } 3731}; 3732 3733/// \brief The injected class name of a C++ class template or class 3734/// template partial specialization. Used to record that a type was 3735/// spelled with a bare identifier rather than as a template-id; the 3736/// equivalent for non-templated classes is just RecordType. 3737/// 3738/// Injected class name types are always dependent. Template 3739/// instantiation turns these into RecordTypes. 3740/// 3741/// Injected class name types are always canonical. This works 3742/// because it is impossible to compare an injected class name type 3743/// with the corresponding non-injected template type, for the same 3744/// reason that it is impossible to directly compare template 3745/// parameters from different dependent contexts: injected class name 3746/// types can only occur within the scope of a particular templated 3747/// declaration, and within that scope every template specialization 3748/// will canonicalize to the injected class name (when appropriate 3749/// according to the rules of the language). 3750class InjectedClassNameType : public Type { 3751 CXXRecordDecl *Decl; 3752 3753 /// The template specialization which this type represents. 3754 /// For example, in 3755 /// template <class T> class A { ... }; 3756 /// this is A<T>, whereas in 3757 /// template <class X, class Y> class A<B<X,Y> > { ... }; 3758 /// this is A<B<X,Y> >. 3759 /// 3760 /// It is always unqualified, always a template specialization type, 3761 /// and always dependent. 3762 QualType InjectedType; 3763 3764 friend class ASTContext; // ASTContext creates these. 3765 friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not 3766 // currently suitable for AST reading, too much 3767 // interdependencies. 3768 InjectedClassNameType(CXXRecordDecl *D, QualType TST) 3769 : Type(InjectedClassName, QualType(), /*Dependent=*/true, 3770 /*InstantiationDependent=*/true, 3771 /*VariablyModified=*/false, 3772 /*ContainsUnexpandedParameterPack=*/false), 3773 Decl(D), InjectedType(TST) { 3774 assert(isa<TemplateSpecializationType>(TST)); 3775 assert(!TST.hasQualifiers()); 3776 assert(TST->isDependentType()); 3777 } 3778 3779public: 3780 QualType getInjectedSpecializationType() const { return InjectedType; } 3781 const TemplateSpecializationType *getInjectedTST() const { 3782 return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); 3783 } 3784 3785 CXXRecordDecl *getDecl() const; 3786 3787 bool isSugared() const { return false; } 3788 QualType desugar() const { return QualType(this, 0); } 3789 3790 static bool classof(const Type *T) { 3791 return T->getTypeClass() == InjectedClassName; 3792 } 3793}; 3794 3795/// \brief The kind of a tag type. 3796enum TagTypeKind { 3797 /// \brief The "struct" keyword. 3798 TTK_Struct, 3799 /// \brief The "__interface" keyword. 3800 TTK_Interface, 3801 /// \brief The "union" keyword. 3802 TTK_Union, 3803 /// \brief The "class" keyword. 3804 TTK_Class, 3805 /// \brief The "enum" keyword. 3806 TTK_Enum 3807}; 3808 3809/// \brief The elaboration keyword that precedes a qualified type name or 3810/// introduces an elaborated-type-specifier. 3811enum ElaboratedTypeKeyword { 3812 /// \brief The "struct" keyword introduces the elaborated-type-specifier. 3813 ETK_Struct, 3814 /// \brief The "__interface" keyword introduces the elaborated-type-specifier. 3815 ETK_Interface, 3816 /// \brief The "union" keyword introduces the elaborated-type-specifier. 3817 ETK_Union, 3818 /// \brief The "class" keyword introduces the elaborated-type-specifier. 3819 ETK_Class, 3820 /// \brief The "enum" keyword introduces the elaborated-type-specifier. 3821 ETK_Enum, 3822 /// \brief The "typename" keyword precedes the qualified type name, e.g., 3823 /// \c typename T::type. 3824 ETK_Typename, 3825 /// \brief No keyword precedes the qualified type name. 3826 ETK_None 3827}; 3828 3829/// A helper class for Type nodes having an ElaboratedTypeKeyword. 3830/// The keyword in stored in the free bits of the base class. 3831/// Also provides a few static helpers for converting and printing 3832/// elaborated type keyword and tag type kind enumerations. 3833class TypeWithKeyword : public Type { 3834protected: 3835 TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, 3836 QualType Canonical, bool Dependent, 3837 bool InstantiationDependent, bool VariablyModified, 3838 bool ContainsUnexpandedParameterPack) 3839 : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified, 3840 ContainsUnexpandedParameterPack) { 3841 TypeWithKeywordBits.Keyword = Keyword; 3842 } 3843 3844public: 3845 ElaboratedTypeKeyword getKeyword() const { 3846 return static_cast<ElaboratedTypeKeyword>(TypeWithKeywordBits.Keyword); 3847 } 3848 3849 /// getKeywordForTypeSpec - Converts a type specifier (DeclSpec::TST) 3850 /// into an elaborated type keyword. 3851 static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); 3852 3853 /// getTagTypeKindForTypeSpec - Converts a type specifier (DeclSpec::TST) 3854 /// into a tag type kind. It is an error to provide a type specifier 3855 /// which *isn't* a tag kind here. 3856 static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); 3857 3858 /// getKeywordForTagDeclKind - Converts a TagTypeKind into an 3859 /// elaborated type keyword. 3860 static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); 3861 3862 /// getTagTypeKindForKeyword - Converts an elaborated type keyword into 3863 // a TagTypeKind. It is an error to provide an elaborated type keyword 3864 /// which *isn't* a tag kind here. 3865 static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); 3866 3867 static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); 3868 3869 static const char *getKeywordName(ElaboratedTypeKeyword Keyword); 3870 3871 static const char *getTagTypeKindName(TagTypeKind Kind) { 3872 return getKeywordName(getKeywordForTagTypeKind(Kind)); 3873 } 3874 3875 class CannotCastToThisType {}; 3876 static CannotCastToThisType classof(const Type *); 3877}; 3878 3879/// \brief Represents a type that was referred to using an elaborated type 3880/// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, 3881/// or both. 3882/// 3883/// This type is used to keep track of a type name as written in the 3884/// source code, including tag keywords and any nested-name-specifiers. 3885/// The type itself is always "sugar", used to express what was written 3886/// in the source code but containing no additional semantic information. 3887class ElaboratedType : public TypeWithKeyword, public llvm::FoldingSetNode { 3888 3889 /// \brief The nested name specifier containing the qualifier. 3890 NestedNameSpecifier *NNS; 3891 3892 /// \brief The type that this qualified name refers to. 3893 QualType NamedType; 3894 3895 ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3896 QualType NamedType, QualType CanonType) 3897 : TypeWithKeyword(Keyword, Elaborated, CanonType, 3898 NamedType->isDependentType(), 3899 NamedType->isInstantiationDependentType(), 3900 NamedType->isVariablyModifiedType(), 3901 NamedType->containsUnexpandedParameterPack()), 3902 NNS(NNS), NamedType(NamedType) { 3903 assert(!(Keyword == ETK_None && NNS == 0) && 3904 "ElaboratedType cannot have elaborated type keyword " 3905 "and name qualifier both null."); 3906 } 3907 3908 friend class ASTContext; // ASTContext creates these 3909 3910public: 3911 ~ElaboratedType(); 3912 3913 /// \brief Retrieve the qualification on this type. 3914 NestedNameSpecifier *getQualifier() const { return NNS; } 3915 3916 /// \brief Retrieve the type named by the qualified-id. 3917 QualType getNamedType() const { return NamedType; } 3918 3919 /// \brief Remove a single level of sugar. 3920 QualType desugar() const { return getNamedType(); } 3921 3922 /// \brief Returns whether this type directly provides sugar. 3923 bool isSugared() const { return true; } 3924 3925 void Profile(llvm::FoldingSetNodeID &ID) { 3926 Profile(ID, getKeyword(), NNS, NamedType); 3927 } 3928 3929 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3930 NestedNameSpecifier *NNS, QualType NamedType) { 3931 ID.AddInteger(Keyword); 3932 ID.AddPointer(NNS); 3933 NamedType.Profile(ID); 3934 } 3935 3936 static bool classof(const Type *T) { 3937 return T->getTypeClass() == Elaborated; 3938 } 3939}; 3940 3941/// \brief Represents a qualified type name for which the type name is 3942/// dependent. 3943/// 3944/// DependentNameType represents a class of dependent types that involve a 3945/// dependent nested-name-specifier (e.g., "T::") followed by a (dependent) 3946/// name of a type. The DependentNameType may start with a "typename" (for a 3947/// typename-specifier), "class", "struct", "union", or "enum" (for a 3948/// dependent elaborated-type-specifier), or nothing (in contexts where we 3949/// know that we must be referring to a type, e.g., in a base class specifier). 3950class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { 3951 3952 /// \brief The nested name specifier containing the qualifier. 3953 NestedNameSpecifier *NNS; 3954 3955 /// \brief The type that this typename specifier refers to. 3956 const IdentifierInfo *Name; 3957 3958 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3959 const IdentifierInfo *Name, QualType CanonType) 3960 : TypeWithKeyword(Keyword, DependentName, CanonType, /*Dependent=*/true, 3961 /*InstantiationDependent=*/true, 3962 /*VariablyModified=*/false, 3963 NNS->containsUnexpandedParameterPack()), 3964 NNS(NNS), Name(Name) { 3965 assert(NNS->isDependent() && 3966 "DependentNameType requires a dependent nested-name-specifier"); 3967 } 3968 3969 friend class ASTContext; // ASTContext creates these 3970 3971public: 3972 /// \brief Retrieve the qualification on this type. 3973 NestedNameSpecifier *getQualifier() const { return NNS; } 3974 3975 /// \brief Retrieve the type named by the typename specifier as an 3976 /// identifier. 3977 /// 3978 /// This routine will return a non-NULL identifier pointer when the 3979 /// form of the original typename was terminated by an identifier, 3980 /// e.g., "typename T::type". 3981 const IdentifierInfo *getIdentifier() const { 3982 return Name; 3983 } 3984 3985 bool isSugared() const { return false; } 3986 QualType desugar() const { return QualType(this, 0); } 3987 3988 void Profile(llvm::FoldingSetNodeID &ID) { 3989 Profile(ID, getKeyword(), NNS, Name); 3990 } 3991 3992 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3993 NestedNameSpecifier *NNS, const IdentifierInfo *Name) { 3994 ID.AddInteger(Keyword); 3995 ID.AddPointer(NNS); 3996 ID.AddPointer(Name); 3997 } 3998 3999 static bool classof(const Type *T) { 4000 return T->getTypeClass() == DependentName; 4001 } 4002}; 4003 4004/// DependentTemplateSpecializationType - Represents a template 4005/// specialization type whose template cannot be resolved, e.g. 4006/// A<T>::template B<T> 4007class DependentTemplateSpecializationType : 4008 public TypeWithKeyword, public llvm::FoldingSetNode { 4009 4010 /// \brief The nested name specifier containing the qualifier. 4011 NestedNameSpecifier *NNS; 4012 4013 /// \brief The identifier of the template. 4014 const IdentifierInfo *Name; 4015 4016 /// \brief - The number of template arguments named in this class 4017 /// template specialization. 4018 unsigned NumArgs; 4019 4020 const TemplateArgument *getArgBuffer() const { 4021 return reinterpret_cast<const TemplateArgument*>(this+1); 4022 } 4023 TemplateArgument *getArgBuffer() { 4024 return reinterpret_cast<TemplateArgument*>(this+1); 4025 } 4026 4027 DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 4028 NestedNameSpecifier *NNS, 4029 const IdentifierInfo *Name, 4030 unsigned NumArgs, 4031 const TemplateArgument *Args, 4032 QualType Canon); 4033 4034 friend class ASTContext; // ASTContext creates these 4035 4036public: 4037 NestedNameSpecifier *getQualifier() const { return NNS; } 4038 const IdentifierInfo *getIdentifier() const { return Name; } 4039 4040 /// \brief Retrieve the template arguments. 4041 const TemplateArgument *getArgs() const { 4042 return getArgBuffer(); 4043 } 4044 4045 /// \brief Retrieve the number of template arguments. 4046 unsigned getNumArgs() const { return NumArgs; } 4047 4048 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 4049 4050 typedef const TemplateArgument * iterator; 4051 iterator begin() const { return getArgs(); } 4052 iterator end() const; // inline in TemplateBase.h 4053 4054 bool isSugared() const { return false; } 4055 QualType desugar() const { return QualType(this, 0); } 4056 4057 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) { 4058 Profile(ID, Context, getKeyword(), NNS, Name, NumArgs, getArgs()); 4059 } 4060 4061 static void Profile(llvm::FoldingSetNodeID &ID, 4062 const ASTContext &Context, 4063 ElaboratedTypeKeyword Keyword, 4064 NestedNameSpecifier *Qualifier, 4065 const IdentifierInfo *Name, 4066 unsigned NumArgs, 4067 const TemplateArgument *Args); 4068 4069 static bool classof(const Type *T) { 4070 return T->getTypeClass() == DependentTemplateSpecialization; 4071 } 4072}; 4073 4074/// \brief Represents a pack expansion of types. 4075/// 4076/// Pack expansions are part of C++0x variadic templates. A pack 4077/// expansion contains a pattern, which itself contains one or more 4078/// "unexpanded" parameter packs. When instantiated, a pack expansion 4079/// produces a series of types, each instantiated from the pattern of 4080/// the expansion, where the Ith instantiation of the pattern uses the 4081/// Ith arguments bound to each of the unexpanded parameter packs. The 4082/// pack expansion is considered to "expand" these unexpanded 4083/// parameter packs. 4084/// 4085/// \code 4086/// template<typename ...Types> struct tuple; 4087/// 4088/// template<typename ...Types> 4089/// struct tuple_of_references { 4090/// typedef tuple<Types&...> type; 4091/// }; 4092/// \endcode 4093/// 4094/// Here, the pack expansion \c Types&... is represented via a 4095/// PackExpansionType whose pattern is Types&. 4096class PackExpansionType : public Type, public llvm::FoldingSetNode { 4097 /// \brief The pattern of the pack expansion. 4098 QualType Pattern; 4099 4100 /// \brief The number of expansions that this pack expansion will 4101 /// generate when substituted (+1), or indicates that 4102 /// 4103 /// This field will only have a non-zero value when some of the parameter 4104 /// packs that occur within the pattern have been substituted but others have 4105 /// not. 4106 unsigned NumExpansions; 4107 4108 PackExpansionType(QualType Pattern, QualType Canon, 4109 Optional<unsigned> NumExpansions) 4110 : Type(PackExpansion, Canon, /*Dependent=*/Pattern->isDependentType(), 4111 /*InstantiationDependent=*/true, 4112 /*VariableModified=*/Pattern->isVariablyModifiedType(), 4113 /*ContainsUnexpandedParameterPack=*/false), 4114 Pattern(Pattern), 4115 NumExpansions(NumExpansions? *NumExpansions + 1: 0) { } 4116 4117 friend class ASTContext; // ASTContext creates these 4118 4119public: 4120 /// \brief Retrieve the pattern of this pack expansion, which is the 4121 /// type that will be repeatedly instantiated when instantiating the 4122 /// pack expansion itself. 4123 QualType getPattern() const { return Pattern; } 4124 4125 /// \brief Retrieve the number of expansions that this pack expansion will 4126 /// generate, if known. 4127 Optional<unsigned> getNumExpansions() const { 4128 if (NumExpansions) 4129 return NumExpansions - 1; 4130 4131 return None; 4132 } 4133 4134 bool isSugared() const { return false; } 4135 QualType desugar() const { return QualType(this, 0); } 4136 4137 void Profile(llvm::FoldingSetNodeID &ID) { 4138 Profile(ID, getPattern(), getNumExpansions()); 4139 } 4140 4141 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pattern, 4142 Optional<unsigned> NumExpansions) { 4143 ID.AddPointer(Pattern.getAsOpaquePtr()); 4144 ID.AddBoolean(NumExpansions.hasValue()); 4145 if (NumExpansions) 4146 ID.AddInteger(*NumExpansions); 4147 } 4148 4149 static bool classof(const Type *T) { 4150 return T->getTypeClass() == PackExpansion; 4151 } 4152}; 4153 4154/// ObjCObjectType - Represents a class type in Objective C. 4155/// Every Objective C type is a combination of a base type and a 4156/// list of protocols. 4157/// 4158/// Given the following declarations: 4159/// \code 4160/// \@class C; 4161/// \@protocol P; 4162/// \endcode 4163/// 4164/// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType 4165/// with base C and no protocols. 4166/// 4167/// 'C<P>' is an ObjCObjectType with base C and protocol list [P]. 4168/// 4169/// 'id' is a TypedefType which is sugar for an ObjCPointerType whose 4170/// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType 4171/// and no protocols. 4172/// 4173/// 'id<P>' is an ObjCPointerType whose pointee is an ObjCObjecType 4174/// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually 4175/// this should get its own sugar class to better represent the source. 4176class ObjCObjectType : public Type { 4177 // ObjCObjectType.NumProtocols - the number of protocols stored 4178 // after the ObjCObjectPointerType node. 4179 // 4180 // These protocols are those written directly on the type. If 4181 // protocol qualifiers ever become additive, the iterators will need 4182 // to get kindof complicated. 4183 // 4184 // In the canonical object type, these are sorted alphabetically 4185 // and uniqued. 4186 4187 /// Either a BuiltinType or an InterfaceType or sugar for either. 4188 QualType BaseType; 4189 4190 ObjCProtocolDecl * const *getProtocolStorage() const { 4191 return const_cast<ObjCObjectType*>(this)->getProtocolStorage(); 4192 } 4193 4194 ObjCProtocolDecl **getProtocolStorage(); 4195 4196protected: 4197 ObjCObjectType(QualType Canonical, QualType Base, 4198 ObjCProtocolDecl * const *Protocols, unsigned NumProtocols); 4199 4200 enum Nonce_ObjCInterface { Nonce_ObjCInterface }; 4201 ObjCObjectType(enum Nonce_ObjCInterface) 4202 : Type(ObjCInterface, QualType(), false, false, false, false), 4203 BaseType(QualType(this_(), 0)) { 4204 ObjCObjectTypeBits.NumProtocols = 0; 4205 } 4206 4207public: 4208 /// getBaseType - Gets the base type of this object type. This is 4209 /// always (possibly sugar for) one of: 4210 /// - the 'id' builtin type (as opposed to the 'id' type visible to the 4211 /// user, which is a typedef for an ObjCPointerType) 4212 /// - the 'Class' builtin type (same caveat) 4213 /// - an ObjCObjectType (currently always an ObjCInterfaceType) 4214 QualType getBaseType() const { return BaseType; } 4215 4216 bool isObjCId() const { 4217 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); 4218 } 4219 bool isObjCClass() const { 4220 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); 4221 } 4222 bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } 4223 bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } 4224 bool isObjCUnqualifiedIdOrClass() const { 4225 if (!qual_empty()) return false; 4226 if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) 4227 return T->getKind() == BuiltinType::ObjCId || 4228 T->getKind() == BuiltinType::ObjCClass; 4229 return false; 4230 } 4231 bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } 4232 bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } 4233 4234 /// Gets the interface declaration for this object type, if the base type 4235 /// really is an interface. 4236 ObjCInterfaceDecl *getInterface() const; 4237 4238 typedef ObjCProtocolDecl * const *qual_iterator; 4239 4240 qual_iterator qual_begin() const { return getProtocolStorage(); } 4241 qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } 4242 4243 bool qual_empty() const { return getNumProtocols() == 0; } 4244 4245 /// getNumProtocols - Return the number of qualifying protocols in this 4246 /// interface type, or 0 if there are none. 4247 unsigned getNumProtocols() const { return ObjCObjectTypeBits.NumProtocols; } 4248 4249 /// \brief Fetch a protocol by index. 4250 ObjCProtocolDecl *getProtocol(unsigned I) const { 4251 assert(I < getNumProtocols() && "Out-of-range protocol access"); 4252 return qual_begin()[I]; 4253 } 4254 4255 bool isSugared() const { return false; } 4256 QualType desugar() const { return QualType(this, 0); } 4257 4258 static bool classof(const Type *T) { 4259 return T->getTypeClass() == ObjCObject || 4260 T->getTypeClass() == ObjCInterface; 4261 } 4262}; 4263 4264/// ObjCObjectTypeImpl - A class providing a concrete implementation 4265/// of ObjCObjectType, so as to not increase the footprint of 4266/// ObjCInterfaceType. Code outside of ASTContext and the core type 4267/// system should not reference this type. 4268class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { 4269 friend class ASTContext; 4270 4271 // If anyone adds fields here, ObjCObjectType::getProtocolStorage() 4272 // will need to be modified. 4273 4274 ObjCObjectTypeImpl(QualType Canonical, QualType Base, 4275 ObjCProtocolDecl * const *Protocols, 4276 unsigned NumProtocols) 4277 : ObjCObjectType(Canonical, Base, Protocols, NumProtocols) {} 4278 4279public: 4280 void Profile(llvm::FoldingSetNodeID &ID); 4281 static void Profile(llvm::FoldingSetNodeID &ID, 4282 QualType Base, 4283 ObjCProtocolDecl *const *protocols, 4284 unsigned NumProtocols); 4285}; 4286 4287inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorage() { 4288 return reinterpret_cast<ObjCProtocolDecl**>( 4289 static_cast<ObjCObjectTypeImpl*>(this) + 1); 4290} 4291 4292/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 4293/// object oriented design. They basically correspond to C++ classes. There 4294/// are two kinds of interface types, normal interfaces like "NSString" and 4295/// qualified interfaces, which are qualified with a protocol list like 4296/// "NSString<NSCopyable, NSAmazing>". 4297/// 4298/// ObjCInterfaceType guarantees the following properties when considered 4299/// as a subtype of its superclass, ObjCObjectType: 4300/// - There are no protocol qualifiers. To reinforce this, code which 4301/// tries to invoke the protocol methods via an ObjCInterfaceType will 4302/// fail to compile. 4303/// - It is its own base type. That is, if T is an ObjCInterfaceType*, 4304/// T->getBaseType() == QualType(T, 0). 4305class ObjCInterfaceType : public ObjCObjectType { 4306 mutable ObjCInterfaceDecl *Decl; 4307 4308 ObjCInterfaceType(const ObjCInterfaceDecl *D) 4309 : ObjCObjectType(Nonce_ObjCInterface), 4310 Decl(const_cast<ObjCInterfaceDecl*>(D)) {} 4311 friend class ASTContext; // ASTContext creates these. 4312 friend class ASTReader; 4313 friend class ObjCInterfaceDecl; 4314 4315public: 4316 /// getDecl - Get the declaration of this interface. 4317 ObjCInterfaceDecl *getDecl() const { return Decl; } 4318 4319 bool isSugared() const { return false; } 4320 QualType desugar() const { return QualType(this, 0); } 4321 4322 static bool classof(const Type *T) { 4323 return T->getTypeClass() == ObjCInterface; 4324 } 4325 4326 // Nonsense to "hide" certain members of ObjCObjectType within this 4327 // class. People asking for protocols on an ObjCInterfaceType are 4328 // not going to get what they want: ObjCInterfaceTypes are 4329 // guaranteed to have no protocols. 4330 enum { 4331 qual_iterator, 4332 qual_begin, 4333 qual_end, 4334 getNumProtocols, 4335 getProtocol 4336 }; 4337}; 4338 4339inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { 4340 if (const ObjCInterfaceType *T = 4341 getBaseType()->getAs<ObjCInterfaceType>()) 4342 return T->getDecl(); 4343 return 0; 4344} 4345 4346/// ObjCObjectPointerType - Used to represent a pointer to an 4347/// Objective C object. These are constructed from pointer 4348/// declarators when the pointee type is an ObjCObjectType (or sugar 4349/// for one). In addition, the 'id' and 'Class' types are typedefs 4350/// for these, and the protocol-qualified types 'id<P>' and 'Class<P>' 4351/// are translated into these. 4352/// 4353/// Pointers to pointers to Objective C objects are still PointerTypes; 4354/// only the first level of pointer gets it own type implementation. 4355class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 4356 QualType PointeeType; 4357 4358 ObjCObjectPointerType(QualType Canonical, QualType Pointee) 4359 : Type(ObjCObjectPointer, Canonical, false, false, false, false), 4360 PointeeType(Pointee) {} 4361 friend class ASTContext; // ASTContext creates these. 4362 4363public: 4364 /// getPointeeType - Gets the type pointed to by this ObjC pointer. 4365 /// The result will always be an ObjCObjectType or sugar thereof. 4366 QualType getPointeeType() const { return PointeeType; } 4367 4368 /// getObjCObjectType - Gets the type pointed to by this ObjC 4369 /// pointer. This method always returns non-null. 4370 /// 4371 /// This method is equivalent to getPointeeType() except that 4372 /// it discards any typedefs (or other sugar) between this 4373 /// type and the "outermost" object type. So for: 4374 /// \code 4375 /// \@class A; \@protocol P; \@protocol Q; 4376 /// typedef A<P> AP; 4377 /// typedef A A1; 4378 /// typedef A1<P> A1P; 4379 /// typedef A1P<Q> A1PQ; 4380 /// \endcode 4381 /// For 'A*', getObjectType() will return 'A'. 4382 /// For 'A<P>*', getObjectType() will return 'A<P>'. 4383 /// For 'AP*', getObjectType() will return 'A<P>'. 4384 /// For 'A1*', getObjectType() will return 'A'. 4385 /// For 'A1<P>*', getObjectType() will return 'A1<P>'. 4386 /// For 'A1P*', getObjectType() will return 'A1<P>'. 4387 /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because 4388 /// adding protocols to a protocol-qualified base discards the 4389 /// old qualifiers (for now). But if it didn't, getObjectType() 4390 /// would return 'A1P<Q>' (and we'd have to make iterating over 4391 /// qualifiers more complicated). 4392 const ObjCObjectType *getObjectType() const { 4393 return PointeeType->castAs<ObjCObjectType>(); 4394 } 4395 4396 /// getInterfaceType - If this pointer points to an Objective C 4397 /// \@interface type, gets the type for that interface. Any protocol 4398 /// qualifiers on the interface are ignored. 4399 /// 4400 /// \return null if the base type for this pointer is 'id' or 'Class' 4401 const ObjCInterfaceType *getInterfaceType() const { 4402 return getObjectType()->getBaseType()->getAs<ObjCInterfaceType>(); 4403 } 4404 4405 /// getInterfaceDecl - If this pointer points to an Objective \@interface 4406 /// type, gets the declaration for that interface. 4407 /// 4408 /// \return null if the base type for this pointer is 'id' or 'Class' 4409 ObjCInterfaceDecl *getInterfaceDecl() const { 4410 return getObjectType()->getInterface(); 4411 } 4412 4413 /// isObjCIdType - True if this is equivalent to the 'id' type, i.e. if 4414 /// its object type is the primitive 'id' type with no protocols. 4415 bool isObjCIdType() const { 4416 return getObjectType()->isObjCUnqualifiedId(); 4417 } 4418 4419 /// isObjCClassType - True if this is equivalent to the 'Class' type, 4420 /// i.e. if its object tive is the primitive 'Class' type with no protocols. 4421 bool isObjCClassType() const { 4422 return getObjectType()->isObjCUnqualifiedClass(); 4423 } 4424 4425 /// isObjCQualifiedIdType - True if this is equivalent to 'id<P>' for some 4426 /// non-empty set of protocols. 4427 bool isObjCQualifiedIdType() const { 4428 return getObjectType()->isObjCQualifiedId(); 4429 } 4430 4431 /// isObjCQualifiedClassType - True if this is equivalent to 'Class<P>' for 4432 /// some non-empty set of protocols. 4433 bool isObjCQualifiedClassType() const { 4434 return getObjectType()->isObjCQualifiedClass(); 4435 } 4436 4437 /// An iterator over the qualifiers on the object type. Provided 4438 /// for convenience. This will always iterate over the full set of 4439 /// protocols on a type, not just those provided directly. 4440 typedef ObjCObjectType::qual_iterator qual_iterator; 4441 4442 qual_iterator qual_begin() const { 4443 return getObjectType()->qual_begin(); 4444 } 4445 qual_iterator qual_end() const { 4446 return getObjectType()->qual_end(); 4447 } 4448 bool qual_empty() const { return getObjectType()->qual_empty(); } 4449 4450 /// getNumProtocols - Return the number of qualifying protocols on 4451 /// the object type. 4452 unsigned getNumProtocols() const { 4453 return getObjectType()->getNumProtocols(); 4454 } 4455 4456 /// \brief Retrieve a qualifying protocol by index on the object 4457 /// type. 4458 ObjCProtocolDecl *getProtocol(unsigned I) const { 4459 return getObjectType()->getProtocol(I); 4460 } 4461 4462 bool isSugared() const { return false; } 4463 QualType desugar() const { return QualType(this, 0); } 4464 4465 void Profile(llvm::FoldingSetNodeID &ID) { 4466 Profile(ID, getPointeeType()); 4467 } 4468 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 4469 ID.AddPointer(T.getAsOpaquePtr()); 4470 } 4471 static bool classof(const Type *T) { 4472 return T->getTypeClass() == ObjCObjectPointer; 4473 } 4474}; 4475 4476class AtomicType : public Type, public llvm::FoldingSetNode { 4477 QualType ValueType; 4478 4479 AtomicType(QualType ValTy, QualType Canonical) 4480 : Type(Atomic, Canonical, ValTy->isDependentType(), 4481 ValTy->isInstantiationDependentType(), 4482 ValTy->isVariablyModifiedType(), 4483 ValTy->containsUnexpandedParameterPack()), 4484 ValueType(ValTy) {} 4485 friend class ASTContext; // ASTContext creates these. 4486 4487 public: 4488 /// getValueType - Gets the type contained by this atomic type, i.e. 4489 /// the type returned by performing an atomic load of this atomic type. 4490 QualType getValueType() const { return ValueType; } 4491 4492 bool isSugared() const { return false; } 4493 QualType desugar() const { return QualType(this, 0); } 4494 4495 void Profile(llvm::FoldingSetNodeID &ID) { 4496 Profile(ID, getValueType()); 4497 } 4498 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 4499 ID.AddPointer(T.getAsOpaquePtr()); 4500 } 4501 static bool classof(const Type *T) { 4502 return T->getTypeClass() == Atomic; 4503 } 4504}; 4505 4506/// A qualifier set is used to build a set of qualifiers. 4507class QualifierCollector : public Qualifiers { 4508public: 4509 QualifierCollector(Qualifiers Qs = Qualifiers()) : Qualifiers(Qs) {} 4510 4511 /// Collect any qualifiers on the given type and return an 4512 /// unqualified type. The qualifiers are assumed to be consistent 4513 /// with those already in the type. 4514 const Type *strip(QualType type) { 4515 addFastQualifiers(type.getLocalFastQualifiers()); 4516 if (!type.hasLocalNonFastQualifiers()) 4517 return type.getTypePtrUnsafe(); 4518 4519 const ExtQuals *extQuals = type.getExtQualsUnsafe(); 4520 addConsistentQualifiers(extQuals->getQualifiers()); 4521 return extQuals->getBaseType(); 4522 } 4523 4524 /// Apply the collected qualifiers to the given type. 4525 QualType apply(const ASTContext &Context, QualType QT) const; 4526 4527 /// Apply the collected qualifiers to the given type. 4528 QualType apply(const ASTContext &Context, const Type* T) const; 4529}; 4530 4531 4532// Inline function definitions. 4533 4534inline SplitQualType SplitQualType::getSingleStepDesugaredType() const { 4535 SplitQualType desugar = 4536 Ty->getLocallyUnqualifiedSingleStepDesugaredType().split(); 4537 desugar.Quals.addConsistentQualifiers(Quals); 4538 return desugar; 4539} 4540 4541inline const Type *QualType::getTypePtr() const { 4542 return getCommonPtr()->BaseType; 4543} 4544 4545inline const Type *QualType::getTypePtrOrNull() const { 4546 return (isNull() ? 0 : getCommonPtr()->BaseType); 4547} 4548 4549inline SplitQualType QualType::split() const { 4550 if (!hasLocalNonFastQualifiers()) 4551 return SplitQualType(getTypePtrUnsafe(), 4552 Qualifiers::fromFastMask(getLocalFastQualifiers())); 4553 4554 const ExtQuals *eq = getExtQualsUnsafe(); 4555 Qualifiers qs = eq->getQualifiers(); 4556 qs.addFastQualifiers(getLocalFastQualifiers()); 4557 return SplitQualType(eq->getBaseType(), qs); 4558} 4559 4560inline Qualifiers QualType::getLocalQualifiers() const { 4561 Qualifiers Quals; 4562 if (hasLocalNonFastQualifiers()) 4563 Quals = getExtQualsUnsafe()->getQualifiers(); 4564 Quals.addFastQualifiers(getLocalFastQualifiers()); 4565 return Quals; 4566} 4567 4568inline Qualifiers QualType::getQualifiers() const { 4569 Qualifiers quals = getCommonPtr()->CanonicalType.getLocalQualifiers(); 4570 quals.addFastQualifiers(getLocalFastQualifiers()); 4571 return quals; 4572} 4573 4574inline unsigned QualType::getCVRQualifiers() const { 4575 unsigned cvr = getCommonPtr()->CanonicalType.getLocalCVRQualifiers(); 4576 cvr |= getLocalCVRQualifiers(); 4577 return cvr; 4578} 4579 4580inline QualType QualType::getCanonicalType() const { 4581 QualType canon = getCommonPtr()->CanonicalType; 4582 return canon.withFastQualifiers(getLocalFastQualifiers()); 4583} 4584 4585inline bool QualType::isCanonical() const { 4586 return getTypePtr()->isCanonicalUnqualified(); 4587} 4588 4589inline bool QualType::isCanonicalAsParam() const { 4590 if (!isCanonical()) return false; 4591 if (hasLocalQualifiers()) return false; 4592 4593 const Type *T = getTypePtr(); 4594 if (T->isVariablyModifiedType() && T->hasSizedVLAType()) 4595 return false; 4596 4597 return !isa<FunctionType>(T) && !isa<ArrayType>(T); 4598} 4599 4600inline bool QualType::isConstQualified() const { 4601 return isLocalConstQualified() || 4602 getCommonPtr()->CanonicalType.isLocalConstQualified(); 4603} 4604 4605inline bool QualType::isRestrictQualified() const { 4606 return isLocalRestrictQualified() || 4607 getCommonPtr()->CanonicalType.isLocalRestrictQualified(); 4608} 4609 4610 4611inline bool QualType::isVolatileQualified() const { 4612 return isLocalVolatileQualified() || 4613 getCommonPtr()->CanonicalType.isLocalVolatileQualified(); 4614} 4615 4616inline bool QualType::hasQualifiers() const { 4617 return hasLocalQualifiers() || 4618 getCommonPtr()->CanonicalType.hasLocalQualifiers(); 4619} 4620 4621inline QualType QualType::getUnqualifiedType() const { 4622 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4623 return QualType(getTypePtr(), 0); 4624 4625 return QualType(getSplitUnqualifiedTypeImpl(*this).Ty, 0); 4626} 4627 4628inline SplitQualType QualType::getSplitUnqualifiedType() const { 4629 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4630 return split(); 4631 4632 return getSplitUnqualifiedTypeImpl(*this); 4633} 4634 4635inline void QualType::removeLocalConst() { 4636 removeLocalFastQualifiers(Qualifiers::Const); 4637} 4638 4639inline void QualType::removeLocalRestrict() { 4640 removeLocalFastQualifiers(Qualifiers::Restrict); 4641} 4642 4643inline void QualType::removeLocalVolatile() { 4644 removeLocalFastQualifiers(Qualifiers::Volatile); 4645} 4646 4647inline void QualType::removeLocalCVRQualifiers(unsigned Mask) { 4648 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 4649 assert((int)Qualifiers::CVRMask == (int)Qualifiers::FastMask); 4650 4651 // Fast path: we don't need to touch the slow qualifiers. 4652 removeLocalFastQualifiers(Mask); 4653} 4654 4655/// getAddressSpace - Return the address space of this type. 4656inline unsigned QualType::getAddressSpace() const { 4657 return getQualifiers().getAddressSpace(); 4658} 4659 4660/// getObjCGCAttr - Return the gc attribute of this type. 4661inline Qualifiers::GC QualType::getObjCGCAttr() const { 4662 return getQualifiers().getObjCGCAttr(); 4663} 4664 4665inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { 4666 if (const PointerType *PT = t.getAs<PointerType>()) { 4667 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 4668 return FT->getExtInfo(); 4669 } else if (const FunctionType *FT = t.getAs<FunctionType>()) 4670 return FT->getExtInfo(); 4671 4672 return FunctionType::ExtInfo(); 4673} 4674 4675inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { 4676 return getFunctionExtInfo(*t); 4677} 4678 4679/// isMoreQualifiedThan - Determine whether this type is more 4680/// qualified than the Other type. For example, "const volatile int" 4681/// is more qualified than "const int", "volatile int", and 4682/// "int". However, it is not more qualified than "const volatile 4683/// int". 4684inline bool QualType::isMoreQualifiedThan(QualType other) const { 4685 Qualifiers myQuals = getQualifiers(); 4686 Qualifiers otherQuals = other.getQualifiers(); 4687 return (myQuals != otherQuals && myQuals.compatiblyIncludes(otherQuals)); 4688} 4689 4690/// isAtLeastAsQualifiedAs - Determine whether this type is at last 4691/// as qualified as the Other type. For example, "const volatile 4692/// int" is at least as qualified as "const int", "volatile int", 4693/// "int", and "const volatile int". 4694inline bool QualType::isAtLeastAsQualifiedAs(QualType other) const { 4695 return getQualifiers().compatiblyIncludes(other.getQualifiers()); 4696} 4697 4698/// getNonReferenceType - If Type is a reference type (e.g., const 4699/// int&), returns the type that the reference refers to ("const 4700/// int"). Otherwise, returns the type itself. This routine is used 4701/// throughout Sema to implement C++ 5p6: 4702/// 4703/// If an expression initially has the type "reference to T" (8.3.2, 4704/// 8.5.3), the type is adjusted to "T" prior to any further 4705/// analysis, the expression designates the object or function 4706/// denoted by the reference, and the expression is an lvalue. 4707inline QualType QualType::getNonReferenceType() const { 4708 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 4709 return RefType->getPointeeType(); 4710 else 4711 return *this; 4712} 4713 4714inline bool QualType::isCForbiddenLValueType() const { 4715 return ((getTypePtr()->isVoidType() && !hasQualifiers()) || 4716 getTypePtr()->isFunctionType()); 4717} 4718 4719/// \brief Tests whether the type is categorized as a fundamental type. 4720/// 4721/// \returns True for types specified in C++0x [basic.fundamental]. 4722inline bool Type::isFundamentalType() const { 4723 return isVoidType() || 4724 // FIXME: It's really annoying that we don't have an 4725 // 'isArithmeticType()' which agrees with the standard definition. 4726 (isArithmeticType() && !isEnumeralType()); 4727} 4728 4729/// \brief Tests whether the type is categorized as a compound type. 4730/// 4731/// \returns True for types specified in C++0x [basic.compound]. 4732inline bool Type::isCompoundType() const { 4733 // C++0x [basic.compound]p1: 4734 // Compound types can be constructed in the following ways: 4735 // -- arrays of objects of a given type [...]; 4736 return isArrayType() || 4737 // -- functions, which have parameters of given types [...]; 4738 isFunctionType() || 4739 // -- pointers to void or objects or functions [...]; 4740 isPointerType() || 4741 // -- references to objects or functions of a given type. [...] 4742 isReferenceType() || 4743 // -- classes containing a sequence of objects of various types, [...]; 4744 isRecordType() || 4745 // -- unions, which are classes capable of containing objects of different 4746 // types at different times; 4747 isUnionType() || 4748 // -- enumerations, which comprise a set of named constant values. [...]; 4749 isEnumeralType() || 4750 // -- pointers to non-static class members, [...]. 4751 isMemberPointerType(); 4752} 4753 4754inline bool Type::isFunctionType() const { 4755 return isa<FunctionType>(CanonicalType); 4756} 4757inline bool Type::isPointerType() const { 4758 return isa<PointerType>(CanonicalType); 4759} 4760inline bool Type::isAnyPointerType() const { 4761 return isPointerType() || isObjCObjectPointerType(); 4762} 4763inline bool Type::isBlockPointerType() const { 4764 return isa<BlockPointerType>(CanonicalType); 4765} 4766inline bool Type::isReferenceType() const { 4767 return isa<ReferenceType>(CanonicalType); 4768} 4769inline bool Type::isLValueReferenceType() const { 4770 return isa<LValueReferenceType>(CanonicalType); 4771} 4772inline bool Type::isRValueReferenceType() const { 4773 return isa<RValueReferenceType>(CanonicalType); 4774} 4775inline bool Type::isFunctionPointerType() const { 4776 if (const PointerType *T = getAs<PointerType>()) 4777 return T->getPointeeType()->isFunctionType(); 4778 else 4779 return false; 4780} 4781inline bool Type::isMemberPointerType() const { 4782 return isa<MemberPointerType>(CanonicalType); 4783} 4784inline bool Type::isMemberFunctionPointerType() const { 4785 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4786 return T->isMemberFunctionPointer(); 4787 else 4788 return false; 4789} 4790inline bool Type::isMemberDataPointerType() const { 4791 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4792 return T->isMemberDataPointer(); 4793 else 4794 return false; 4795} 4796inline bool Type::isArrayType() const { 4797 return isa<ArrayType>(CanonicalType); 4798} 4799inline bool Type::isConstantArrayType() const { 4800 return isa<ConstantArrayType>(CanonicalType); 4801} 4802inline bool Type::isIncompleteArrayType() const { 4803 return isa<IncompleteArrayType>(CanonicalType); 4804} 4805inline bool Type::isVariableArrayType() const { 4806 return isa<VariableArrayType>(CanonicalType); 4807} 4808inline bool Type::isDependentSizedArrayType() const { 4809 return isa<DependentSizedArrayType>(CanonicalType); 4810} 4811inline bool Type::isBuiltinType() const { 4812 return isa<BuiltinType>(CanonicalType); 4813} 4814inline bool Type::isRecordType() const { 4815 return isa<RecordType>(CanonicalType); 4816} 4817inline bool Type::isEnumeralType() const { 4818 return isa<EnumType>(CanonicalType); 4819} 4820inline bool Type::isAnyComplexType() const { 4821 return isa<ComplexType>(CanonicalType); 4822} 4823inline bool Type::isVectorType() const { 4824 return isa<VectorType>(CanonicalType); 4825} 4826inline bool Type::isExtVectorType() const { 4827 return isa<ExtVectorType>(CanonicalType); 4828} 4829inline bool Type::isObjCObjectPointerType() const { 4830 return isa<ObjCObjectPointerType>(CanonicalType); 4831} 4832inline bool Type::isObjCObjectType() const { 4833 return isa<ObjCObjectType>(CanonicalType); 4834} 4835inline bool Type::isObjCObjectOrInterfaceType() const { 4836 return isa<ObjCInterfaceType>(CanonicalType) || 4837 isa<ObjCObjectType>(CanonicalType); 4838} 4839inline bool Type::isAtomicType() const { 4840 return isa<AtomicType>(CanonicalType); 4841} 4842 4843inline bool Type::isObjCQualifiedIdType() const { 4844 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4845 return OPT->isObjCQualifiedIdType(); 4846 return false; 4847} 4848inline bool Type::isObjCQualifiedClassType() const { 4849 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4850 return OPT->isObjCQualifiedClassType(); 4851 return false; 4852} 4853inline bool Type::isObjCIdType() const { 4854 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4855 return OPT->isObjCIdType(); 4856 return false; 4857} 4858inline bool Type::isObjCClassType() const { 4859 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4860 return OPT->isObjCClassType(); 4861 return false; 4862} 4863inline bool Type::isObjCSelType() const { 4864 if (const PointerType *OPT = getAs<PointerType>()) 4865 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 4866 return false; 4867} 4868inline bool Type::isObjCBuiltinType() const { 4869 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 4870} 4871 4872inline bool Type::isImage1dT() const { 4873 return isSpecificBuiltinType(BuiltinType::OCLImage1d); 4874} 4875 4876inline bool Type::isImage1dArrayT() const { 4877 return isSpecificBuiltinType(BuiltinType::OCLImage1dArray); 4878} 4879 4880inline bool Type::isImage1dBufferT() const { 4881 return isSpecificBuiltinType(BuiltinType::OCLImage1dBuffer); 4882} 4883 4884inline bool Type::isImage2dT() const { 4885 return isSpecificBuiltinType(BuiltinType::OCLImage2d); 4886} 4887 4888inline bool Type::isImage2dArrayT() const { 4889 return isSpecificBuiltinType(BuiltinType::OCLImage2dArray); 4890} 4891 4892inline bool Type::isImage3dT() const { 4893 return isSpecificBuiltinType(BuiltinType::OCLImage3d); 4894} 4895 4896inline bool Type::isSamplerT() const { 4897 return isSpecificBuiltinType(BuiltinType::OCLSampler); 4898} 4899 4900inline bool Type::isEventT() const { 4901 return isSpecificBuiltinType(BuiltinType::OCLEvent); 4902} 4903 4904inline bool Type::isImageType() const { 4905 return isImage3dT() || 4906 isImage2dT() || isImage2dArrayT() || 4907 isImage1dT() || isImage1dArrayT() || isImage1dBufferT(); 4908} 4909 4910inline bool Type::isOpenCLSpecificType() const { 4911 return isSamplerT() || isEventT() || isImageType(); 4912} 4913 4914inline bool Type::isTemplateTypeParmType() const { 4915 return isa<TemplateTypeParmType>(CanonicalType); 4916} 4917 4918inline bool Type::isSpecificBuiltinType(unsigned K) const { 4919 if (const BuiltinType *BT = getAs<BuiltinType>()) 4920 if (BT->getKind() == (BuiltinType::Kind) K) 4921 return true; 4922 return false; 4923} 4924 4925inline bool Type::isPlaceholderType() const { 4926 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4927 return BT->isPlaceholderType(); 4928 return false; 4929} 4930 4931inline const BuiltinType *Type::getAsPlaceholderType() const { 4932 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4933 if (BT->isPlaceholderType()) 4934 return BT; 4935 return 0; 4936} 4937 4938inline bool Type::isSpecificPlaceholderType(unsigned K) const { 4939 assert(BuiltinType::isPlaceholderTypeKind((BuiltinType::Kind) K)); 4940 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4941 return (BT->getKind() == (BuiltinType::Kind) K); 4942 return false; 4943} 4944 4945inline bool Type::isNonOverloadPlaceholderType() const { 4946 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4947 return BT->isNonOverloadPlaceholderType(); 4948 return false; 4949} 4950 4951inline bool Type::isVoidType() const { 4952 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 4953 return BT->getKind() == BuiltinType::Void; 4954 return false; 4955} 4956 4957inline bool Type::isHalfType() const { 4958 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 4959 return BT->getKind() == BuiltinType::Half; 4960 // FIXME: Should we allow complex __fp16? Probably not. 4961 return false; 4962} 4963 4964inline bool Type::isNullPtrType() const { 4965 if (const BuiltinType *BT = getAs<BuiltinType>()) 4966 return BT->getKind() == BuiltinType::NullPtr; 4967 return false; 4968} 4969 4970extern bool IsEnumDeclComplete(EnumDecl *); 4971extern bool IsEnumDeclScoped(EnumDecl *); 4972 4973inline bool Type::isIntegerType() const { 4974 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 4975 return BT->getKind() >= BuiltinType::Bool && 4976 BT->getKind() <= BuiltinType::Int128; 4977 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) { 4978 // Incomplete enum types are not treated as integer types. 4979 // FIXME: In C++, enum types are never integer types. 4980 return IsEnumDeclComplete(ET->getDecl()) && 4981 !IsEnumDeclScoped(ET->getDecl()); 4982 } 4983 return false; 4984} 4985 4986inline bool Type::isScalarType() const { 4987 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 4988 return BT->getKind() > BuiltinType::Void && 4989 BT->getKind() <= BuiltinType::NullPtr; 4990 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) 4991 // Enums are scalar types, but only if they are defined. Incomplete enums 4992 // are not treated as scalar types. 4993 return IsEnumDeclComplete(ET->getDecl()); 4994 return isa<PointerType>(CanonicalType) || 4995 isa<BlockPointerType>(CanonicalType) || 4996 isa<MemberPointerType>(CanonicalType) || 4997 isa<ComplexType>(CanonicalType) || 4998 isa<ObjCObjectPointerType>(CanonicalType); 4999} 5000 5001inline bool Type::isIntegralOrEnumerationType() const { 5002 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 5003 return BT->getKind() >= BuiltinType::Bool && 5004 BT->getKind() <= BuiltinType::Int128; 5005 5006 // Check for a complete enum type; incomplete enum types are not properly an 5007 // enumeration type in the sense required here. 5008 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) 5009 return IsEnumDeclComplete(ET->getDecl()); 5010 5011 return false; 5012} 5013 5014inline bool Type::isBooleanType() const { 5015 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 5016 return BT->getKind() == BuiltinType::Bool; 5017 return false; 5018} 5019 5020/// \brief Determines whether this is a type for which one can define 5021/// an overloaded operator. 5022inline bool Type::isOverloadableType() const { 5023 return isDependentType() || isRecordType() || isEnumeralType(); 5024} 5025 5026/// \brief Determines whether this type can decay to a pointer type. 5027inline bool Type::canDecayToPointerType() const { 5028 return isFunctionType() || isArrayType(); 5029} 5030 5031inline bool Type::hasPointerRepresentation() const { 5032 return (isPointerType() || isReferenceType() || isBlockPointerType() || 5033 isObjCObjectPointerType() || isNullPtrType()); 5034} 5035 5036inline bool Type::hasObjCPointerRepresentation() const { 5037 return isObjCObjectPointerType(); 5038} 5039 5040inline const Type *Type::getBaseElementTypeUnsafe() const { 5041 const Type *type = this; 5042 while (const ArrayType *arrayType = type->getAsArrayTypeUnsafe()) 5043 type = arrayType->getElementType().getTypePtr(); 5044 return type; 5045} 5046 5047/// Insertion operator for diagnostics. This allows sending QualType's into a 5048/// diagnostic with <<. 5049inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 5050 QualType T) { 5051 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 5052 DiagnosticsEngine::ak_qualtype); 5053 return DB; 5054} 5055 5056/// Insertion operator for partial diagnostics. This allows sending QualType's 5057/// into a diagnostic with <<. 5058inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, 5059 QualType T) { 5060 PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 5061 DiagnosticsEngine::ak_qualtype); 5062 return PD; 5063} 5064 5065// Helper class template that is used by Type::getAs to ensure that one does 5066// not try to look through a qualified type to get to an array type. 5067template<typename T, 5068 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 5069 llvm::is_base_of<ArrayType, T>::value)> 5070struct ArrayType_cannot_be_used_with_getAs { }; 5071 5072template<typename T> 5073struct ArrayType_cannot_be_used_with_getAs<T, true>; 5074 5075// Member-template getAs<specific type>'. 5076template <typename T> const T *Type::getAs() const { 5077 ArrayType_cannot_be_used_with_getAs<T> at; 5078 (void)at; 5079 5080 // If this is directly a T type, return it. 5081 if (const T *Ty = dyn_cast<T>(this)) 5082 return Ty; 5083 5084 // If the canonical form of this type isn't the right kind, reject it. 5085 if (!isa<T>(CanonicalType)) 5086 return 0; 5087 5088 // If this is a typedef for the type, strip the typedef off without 5089 // losing all typedef information. 5090 return cast<T>(getUnqualifiedDesugaredType()); 5091} 5092 5093inline const ArrayType *Type::getAsArrayTypeUnsafe() const { 5094 // If this is directly an array type, return it. 5095 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) 5096 return arr; 5097 5098 // If the canonical form of this type isn't the right kind, reject it. 5099 if (!isa<ArrayType>(CanonicalType)) 5100 return 0; 5101 5102 // If this is a typedef for the type, strip the typedef off without 5103 // losing all typedef information. 5104 return cast<ArrayType>(getUnqualifiedDesugaredType()); 5105} 5106 5107template <typename T> const T *Type::castAs() const { 5108 ArrayType_cannot_be_used_with_getAs<T> at; 5109 (void) at; 5110 5111 assert(isa<T>(CanonicalType)); 5112 if (const T *ty = dyn_cast<T>(this)) return ty; 5113 return cast<T>(getUnqualifiedDesugaredType()); 5114} 5115 5116inline const ArrayType *Type::castAsArrayTypeUnsafe() const { 5117 assert(isa<ArrayType>(CanonicalType)); 5118 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) return arr; 5119 return cast<ArrayType>(getUnqualifiedDesugaredType()); 5120} 5121 5122} // end namespace clang 5123 5124#endif 5125