Type.h revision db1519a95687622d08340f9b7522ef84a53b331a
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 /// getUnqualifiedObjCPointerType - Returns the unqualified version if 857 /// Objective-C pointer type; otherwise, returns type as is. 858 inline QualType getUnqualifiedObjCPointerType() const; 859 860 /// operator==/!= - Indicate whether the specified types and qualifiers are 861 /// identical. 862 friend bool operator==(const QualType &LHS, const QualType &RHS) { 863 return LHS.Value == RHS.Value; 864 } 865 friend bool operator!=(const QualType &LHS, const QualType &RHS) { 866 return LHS.Value != RHS.Value; 867 } 868 std::string getAsString() const { 869 return getAsString(split()); 870 } 871 static std::string getAsString(SplitQualType split) { 872 return getAsString(split.Ty, split.Quals); 873 } 874 static std::string getAsString(const Type *ty, Qualifiers qs); 875 876 std::string getAsString(const PrintingPolicy &Policy) const; 877 878 void print(raw_ostream &OS, const PrintingPolicy &Policy, 879 const Twine &PlaceHolder = Twine()) const { 880 print(split(), OS, Policy, PlaceHolder); 881 } 882 static void print(SplitQualType split, raw_ostream &OS, 883 const PrintingPolicy &policy, const Twine &PlaceHolder) { 884 return print(split.Ty, split.Quals, OS, policy, PlaceHolder); 885 } 886 static void print(const Type *ty, Qualifiers qs, 887 raw_ostream &OS, const PrintingPolicy &policy, 888 const Twine &PlaceHolder); 889 890 void getAsStringInternal(std::string &Str, 891 const PrintingPolicy &Policy) const { 892 return getAsStringInternal(split(), Str, Policy); 893 } 894 static void getAsStringInternal(SplitQualType split, std::string &out, 895 const PrintingPolicy &policy) { 896 return getAsStringInternal(split.Ty, split.Quals, out, policy); 897 } 898 static void getAsStringInternal(const Type *ty, Qualifiers qs, 899 std::string &out, 900 const PrintingPolicy &policy); 901 902 class StreamedQualTypeHelper { 903 const QualType &T; 904 const PrintingPolicy &Policy; 905 const Twine &PlaceHolder; 906 public: 907 StreamedQualTypeHelper(const QualType &T, const PrintingPolicy &Policy, 908 const Twine &PlaceHolder) 909 : T(T), Policy(Policy), PlaceHolder(PlaceHolder) { } 910 911 friend raw_ostream &operator<<(raw_ostream &OS, 912 const StreamedQualTypeHelper &SQT) { 913 SQT.T.print(OS, SQT.Policy, SQT.PlaceHolder); 914 return OS; 915 } 916 }; 917 918 StreamedQualTypeHelper stream(const PrintingPolicy &Policy, 919 const Twine &PlaceHolder = Twine()) const { 920 return StreamedQualTypeHelper(*this, Policy, PlaceHolder); 921 } 922 923 void dump(const char *s) const; 924 void dump() const; 925 926 void Profile(llvm::FoldingSetNodeID &ID) const { 927 ID.AddPointer(getAsOpaquePtr()); 928 } 929 930 /// getAddressSpace - Return the address space of this type. 931 inline unsigned getAddressSpace() const; 932 933 /// getObjCGCAttr - Returns gc attribute of this type. 934 inline Qualifiers::GC getObjCGCAttr() const; 935 936 /// isObjCGCWeak true when Type is objc's weak. 937 bool isObjCGCWeak() const { 938 return getObjCGCAttr() == Qualifiers::Weak; 939 } 940 941 /// isObjCGCStrong true when Type is objc's strong. 942 bool isObjCGCStrong() const { 943 return getObjCGCAttr() == Qualifiers::Strong; 944 } 945 946 /// getObjCLifetime - Returns lifetime attribute of this type. 947 Qualifiers::ObjCLifetime getObjCLifetime() const { 948 return getQualifiers().getObjCLifetime(); 949 } 950 951 bool hasNonTrivialObjCLifetime() const { 952 return getQualifiers().hasNonTrivialObjCLifetime(); 953 } 954 955 bool hasStrongOrWeakObjCLifetime() const { 956 return getQualifiers().hasStrongOrWeakObjCLifetime(); 957 } 958 959 enum DestructionKind { 960 DK_none, 961 DK_cxx_destructor, 962 DK_objc_strong_lifetime, 963 DK_objc_weak_lifetime 964 }; 965 966 /// isDestructedType - nonzero if objects of this type require 967 /// non-trivial work to clean up after. Non-zero because it's 968 /// conceivable that qualifiers (objc_gc(weak)?) could make 969 /// something require destruction. 970 DestructionKind isDestructedType() const { 971 return isDestructedTypeImpl(*this); 972 } 973 974 /// \brief Determine whether expressions of the given type are forbidden 975 /// from being lvalues in C. 976 /// 977 /// The expression types that are forbidden to be lvalues are: 978 /// - 'void', but not qualified void 979 /// - function types 980 /// 981 /// The exact rule here is C99 6.3.2.1: 982 /// An lvalue is an expression with an object type or an incomplete 983 /// type other than void. 984 bool isCForbiddenLValueType() const; 985 986private: 987 // These methods are implemented in a separate translation unit; 988 // "static"-ize them to avoid creating temporary QualTypes in the 989 // caller. 990 static bool isConstant(QualType T, ASTContext& Ctx); 991 static QualType getDesugaredType(QualType T, const ASTContext &Context); 992 static SplitQualType getSplitDesugaredType(QualType T); 993 static SplitQualType getSplitUnqualifiedTypeImpl(QualType type); 994 static QualType getSingleStepDesugaredTypeImpl(QualType type, 995 const ASTContext &C); 996 static QualType IgnoreParens(QualType T); 997 static DestructionKind isDestructedTypeImpl(QualType type); 998}; 999 1000} // end clang. 1001 1002namespace llvm { 1003/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 1004/// to a specific Type class. 1005template<> struct simplify_type< ::clang::QualType> { 1006 typedef const ::clang::Type *SimpleType; 1007 static SimpleType getSimplifiedValue(::clang::QualType Val) { 1008 return Val.getTypePtr(); 1009 } 1010}; 1011 1012// Teach SmallPtrSet that QualType is "basically a pointer". 1013template<> 1014class PointerLikeTypeTraits<clang::QualType> { 1015public: 1016 static inline void *getAsVoidPointer(clang::QualType P) { 1017 return P.getAsOpaquePtr(); 1018 } 1019 static inline clang::QualType getFromVoidPointer(void *P) { 1020 return clang::QualType::getFromOpaquePtr(P); 1021 } 1022 // Various qualifiers go in low bits. 1023 enum { NumLowBitsAvailable = 0 }; 1024}; 1025 1026} // end namespace llvm 1027 1028namespace clang { 1029 1030/// \brief Base class that is common to both the \c ExtQuals and \c Type 1031/// classes, which allows \c QualType to access the common fields between the 1032/// two. 1033/// 1034class ExtQualsTypeCommonBase { 1035 ExtQualsTypeCommonBase(const Type *baseType, QualType canon) 1036 : BaseType(baseType), CanonicalType(canon) {} 1037 1038 /// \brief The "base" type of an extended qualifiers type (\c ExtQuals) or 1039 /// a self-referential pointer (for \c Type). 1040 /// 1041 /// This pointer allows an efficient mapping from a QualType to its 1042 /// underlying type pointer. 1043 const Type *const BaseType; 1044 1045 /// \brief The canonical type of this type. A QualType. 1046 QualType CanonicalType; 1047 1048 friend class QualType; 1049 friend class Type; 1050 friend class ExtQuals; 1051}; 1052 1053/// ExtQuals - We can encode up to four bits in the low bits of a 1054/// type pointer, but there are many more type qualifiers that we want 1055/// to be able to apply to an arbitrary type. Therefore we have this 1056/// struct, intended to be heap-allocated and used by QualType to 1057/// store qualifiers. 1058/// 1059/// The current design tags the 'const', 'restrict', and 'volatile' qualifiers 1060/// in three low bits on the QualType pointer; a fourth bit records whether 1061/// the pointer is an ExtQuals node. The extended qualifiers (address spaces, 1062/// Objective-C GC attributes) are much more rare. 1063class ExtQuals : public ExtQualsTypeCommonBase, public llvm::FoldingSetNode { 1064 // NOTE: changing the fast qualifiers should be straightforward as 1065 // long as you don't make 'const' non-fast. 1066 // 1. Qualifiers: 1067 // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). 1068 // Fast qualifiers must occupy the low-order bits. 1069 // b) Update Qualifiers::FastWidth and FastMask. 1070 // 2. QualType: 1071 // a) Update is{Volatile,Restrict}Qualified(), defined inline. 1072 // b) Update remove{Volatile,Restrict}, defined near the end of 1073 // this header. 1074 // 3. ASTContext: 1075 // a) Update get{Volatile,Restrict}Type. 1076 1077 /// Quals - the immutable set of qualifiers applied by this 1078 /// node; always contains extended qualifiers. 1079 Qualifiers Quals; 1080 1081 ExtQuals *this_() { return this; } 1082 1083public: 1084 ExtQuals(const Type *baseType, QualType canon, Qualifiers quals) 1085 : ExtQualsTypeCommonBase(baseType, 1086 canon.isNull() ? QualType(this_(), 0) : canon), 1087 Quals(quals) 1088 { 1089 assert(Quals.hasNonFastQualifiers() 1090 && "ExtQuals created with no fast qualifiers"); 1091 assert(!Quals.hasFastQualifiers() 1092 && "ExtQuals created with fast qualifiers"); 1093 } 1094 1095 Qualifiers getQualifiers() const { return Quals; } 1096 1097 bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } 1098 Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } 1099 1100 bool hasObjCLifetime() const { return Quals.hasObjCLifetime(); } 1101 Qualifiers::ObjCLifetime getObjCLifetime() const { 1102 return Quals.getObjCLifetime(); 1103 } 1104 1105 bool hasAddressSpace() const { return Quals.hasAddressSpace(); } 1106 unsigned getAddressSpace() const { return Quals.getAddressSpace(); } 1107 1108 const Type *getBaseType() const { return BaseType; } 1109 1110public: 1111 void Profile(llvm::FoldingSetNodeID &ID) const { 1112 Profile(ID, getBaseType(), Quals); 1113 } 1114 static void Profile(llvm::FoldingSetNodeID &ID, 1115 const Type *BaseType, 1116 Qualifiers Quals) { 1117 assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!"); 1118 ID.AddPointer(BaseType); 1119 Quals.Profile(ID); 1120 } 1121}; 1122 1123/// \brief The kind of C++0x ref-qualifier associated with a function type, 1124/// which determines whether a member function's "this" object can be an 1125/// lvalue, rvalue, or neither. 1126enum RefQualifierKind { 1127 /// \brief No ref-qualifier was provided. 1128 RQ_None = 0, 1129 /// \brief An lvalue ref-qualifier was provided (\c &). 1130 RQ_LValue, 1131 /// \brief An rvalue ref-qualifier was provided (\c &&). 1132 RQ_RValue 1133}; 1134 1135/// Type - This is the base class of the type hierarchy. A central concept 1136/// with types is that each type always has a canonical type. A canonical type 1137/// is the type with any typedef names stripped out of it or the types it 1138/// references. For example, consider: 1139/// 1140/// typedef int foo; 1141/// typedef foo* bar; 1142/// 'int *' 'foo *' 'bar' 1143/// 1144/// There will be a Type object created for 'int'. Since int is canonical, its 1145/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 1146/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 1147/// there is a PointerType that represents 'int*', which, like 'int', is 1148/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 1149/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 1150/// is also 'int*'. 1151/// 1152/// Non-canonical types are useful for emitting diagnostics, without losing 1153/// information about typedefs being used. Canonical types are useful for type 1154/// comparisons (they allow by-pointer equality tests) and useful for reasoning 1155/// about whether something has a particular form (e.g. is a function type), 1156/// because they implicitly, recursively, strip all typedefs out of a type. 1157/// 1158/// Types, once created, are immutable. 1159/// 1160class Type : public ExtQualsTypeCommonBase { 1161public: 1162 enum TypeClass { 1163#define TYPE(Class, Base) Class, 1164#define LAST_TYPE(Class) TypeLast = Class, 1165#define ABSTRACT_TYPE(Class, Base) 1166#include "clang/AST/TypeNodes.def" 1167 TagFirst = Record, TagLast = Enum 1168 }; 1169 1170private: 1171 Type(const Type &) LLVM_DELETED_FUNCTION; 1172 void operator=(const Type &) LLVM_DELETED_FUNCTION; 1173 1174 /// Bitfields required by the Type class. 1175 class TypeBitfields { 1176 friend class Type; 1177 template <class T> friend class TypePropertyCache; 1178 1179 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 1180 unsigned TC : 8; 1181 1182 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 1183 unsigned Dependent : 1; 1184 1185 /// \brief Whether this type somehow involves a template parameter, even 1186 /// if the resolution of the type does not depend on a template parameter. 1187 unsigned InstantiationDependent : 1; 1188 1189 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 1190 unsigned VariablyModified : 1; 1191 1192 /// \brief Whether this type contains an unexpanded parameter pack 1193 /// (for C++0x variadic templates). 1194 unsigned ContainsUnexpandedParameterPack : 1; 1195 1196 /// \brief True if the cache (i.e. the bitfields here starting with 1197 /// 'Cache') is valid. 1198 mutable unsigned CacheValid : 1; 1199 1200 /// \brief Linkage of this type. 1201 mutable unsigned CachedLinkage : 2; 1202 1203 /// \brief Whether this type involves and local or unnamed types. 1204 mutable unsigned CachedLocalOrUnnamed : 1; 1205 1206 /// \brief FromAST - Whether this type comes from an AST file. 1207 mutable unsigned FromAST : 1; 1208 1209 bool isCacheValid() const { 1210 return CacheValid; 1211 } 1212 Linkage getLinkage() const { 1213 assert(isCacheValid() && "getting linkage from invalid cache"); 1214 return static_cast<Linkage>(CachedLinkage); 1215 } 1216 bool hasLocalOrUnnamedType() const { 1217 assert(isCacheValid() && "getting linkage from invalid cache"); 1218 return CachedLocalOrUnnamed; 1219 } 1220 }; 1221 enum { NumTypeBits = 19 }; 1222 1223protected: 1224 // These classes allow subclasses to somewhat cleanly pack bitfields 1225 // into Type. 1226 1227 class ArrayTypeBitfields { 1228 friend class ArrayType; 1229 1230 unsigned : NumTypeBits; 1231 1232 /// IndexTypeQuals - CVR qualifiers from declarations like 1233 /// 'int X[static restrict 4]'. For function parameters only. 1234 unsigned IndexTypeQuals : 3; 1235 1236 /// SizeModifier - storage class qualifiers from declarations like 1237 /// 'int X[static restrict 4]'. For function parameters only. 1238 /// Actually an ArrayType::ArraySizeModifier. 1239 unsigned SizeModifier : 3; 1240 }; 1241 1242 class BuiltinTypeBitfields { 1243 friend class BuiltinType; 1244 1245 unsigned : NumTypeBits; 1246 1247 /// The kind (BuiltinType::Kind) of builtin type this is. 1248 unsigned Kind : 8; 1249 }; 1250 1251 class FunctionTypeBitfields { 1252 friend class FunctionType; 1253 1254 unsigned : NumTypeBits; 1255 1256 /// Extra information which affects how the function is called, like 1257 /// regparm and the calling convention. 1258 unsigned ExtInfo : 9; 1259 1260 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1261 /// other bitfields. 1262 /// The qualifiers are part of FunctionProtoType because... 1263 /// 1264 /// C++ 8.3.5p4: The return type, the parameter type list and the 1265 /// cv-qualifier-seq, [...], are part of the function type. 1266 unsigned TypeQuals : 3; 1267 }; 1268 1269 class ObjCObjectTypeBitfields { 1270 friend class ObjCObjectType; 1271 1272 unsigned : NumTypeBits; 1273 1274 /// NumProtocols - The number of protocols stored directly on this 1275 /// object type. 1276 unsigned NumProtocols : 32 - NumTypeBits; 1277 }; 1278 1279 class ReferenceTypeBitfields { 1280 friend class ReferenceType; 1281 1282 unsigned : NumTypeBits; 1283 1284 /// True if the type was originally spelled with an lvalue sigil. 1285 /// This is never true of rvalue references but can also be false 1286 /// on lvalue references because of C++0x [dcl.typedef]p9, 1287 /// as follows: 1288 /// 1289 /// typedef int &ref; // lvalue, spelled lvalue 1290 /// typedef int &&rvref; // rvalue 1291 /// ref &a; // lvalue, inner ref, spelled lvalue 1292 /// ref &&a; // lvalue, inner ref 1293 /// rvref &a; // lvalue, inner ref, spelled lvalue 1294 /// rvref &&a; // rvalue, inner ref 1295 unsigned SpelledAsLValue : 1; 1296 1297 /// True if the inner type is a reference type. This only happens 1298 /// in non-canonical forms. 1299 unsigned InnerRef : 1; 1300 }; 1301 1302 class TypeWithKeywordBitfields { 1303 friend class TypeWithKeyword; 1304 1305 unsigned : NumTypeBits; 1306 1307 /// An ElaboratedTypeKeyword. 8 bits for efficient access. 1308 unsigned Keyword : 8; 1309 }; 1310 1311 class VectorTypeBitfields { 1312 friend class VectorType; 1313 1314 unsigned : NumTypeBits; 1315 1316 /// VecKind - The kind of vector, either a generic vector type or some 1317 /// target-specific vector type such as for AltiVec or Neon. 1318 unsigned VecKind : 3; 1319 1320 /// NumElements - The number of elements in the vector. 1321 unsigned NumElements : 29 - NumTypeBits; 1322 }; 1323 1324 class AttributedTypeBitfields { 1325 friend class AttributedType; 1326 1327 unsigned : NumTypeBits; 1328 1329 /// AttrKind - an AttributedType::Kind 1330 unsigned AttrKind : 32 - NumTypeBits; 1331 }; 1332 1333 class AutoTypeBitfields { 1334 friend class AutoType; 1335 1336 unsigned : NumTypeBits; 1337 1338 /// Was this placeholder type spelled as 'decltype(auto)'? 1339 unsigned IsDecltypeAuto : 1; 1340 }; 1341 1342 union { 1343 TypeBitfields TypeBits; 1344 ArrayTypeBitfields ArrayTypeBits; 1345 AttributedTypeBitfields AttributedTypeBits; 1346 AutoTypeBitfields AutoTypeBits; 1347 BuiltinTypeBitfields BuiltinTypeBits; 1348 FunctionTypeBitfields FunctionTypeBits; 1349 ObjCObjectTypeBitfields ObjCObjectTypeBits; 1350 ReferenceTypeBitfields ReferenceTypeBits; 1351 TypeWithKeywordBitfields TypeWithKeywordBits; 1352 VectorTypeBitfields VectorTypeBits; 1353 }; 1354 1355private: 1356 /// \brief Set whether this type comes from an AST file. 1357 void setFromAST(bool V = true) const { 1358 TypeBits.FromAST = V; 1359 } 1360 1361 template <class T> friend class TypePropertyCache; 1362 1363protected: 1364 // silence VC++ warning C4355: 'this' : used in base member initializer list 1365 Type *this_() { return this; } 1366 Type(TypeClass tc, QualType canon, bool Dependent, 1367 bool InstantiationDependent, bool VariablyModified, 1368 bool ContainsUnexpandedParameterPack) 1369 : ExtQualsTypeCommonBase(this, 1370 canon.isNull() ? QualType(this_(), 0) : canon) { 1371 TypeBits.TC = tc; 1372 TypeBits.Dependent = Dependent; 1373 TypeBits.InstantiationDependent = Dependent || InstantiationDependent; 1374 TypeBits.VariablyModified = VariablyModified; 1375 TypeBits.ContainsUnexpandedParameterPack = ContainsUnexpandedParameterPack; 1376 TypeBits.CacheValid = false; 1377 TypeBits.CachedLocalOrUnnamed = false; 1378 TypeBits.CachedLinkage = NoLinkage; 1379 TypeBits.FromAST = false; 1380 } 1381 friend class ASTContext; 1382 1383 void setDependent(bool D = true) { 1384 TypeBits.Dependent = D; 1385 if (D) 1386 TypeBits.InstantiationDependent = true; 1387 } 1388 void setInstantiationDependent(bool D = true) { 1389 TypeBits.InstantiationDependent = D; } 1390 void setVariablyModified(bool VM = true) { TypeBits.VariablyModified = VM; 1391 } 1392 void setContainsUnexpandedParameterPack(bool PP = true) { 1393 TypeBits.ContainsUnexpandedParameterPack = PP; 1394 } 1395 1396public: 1397 TypeClass getTypeClass() const { return static_cast<TypeClass>(TypeBits.TC); } 1398 1399 /// \brief Whether this type comes from an AST file. 1400 bool isFromAST() const { return TypeBits.FromAST; } 1401 1402 /// \brief Whether this type is or contains an unexpanded parameter 1403 /// pack, used to support C++0x variadic templates. 1404 /// 1405 /// A type that contains a parameter pack shall be expanded by the 1406 /// ellipsis operator at some point. For example, the typedef in the 1407 /// following example contains an unexpanded parameter pack 'T': 1408 /// 1409 /// \code 1410 /// template<typename ...T> 1411 /// struct X { 1412 /// typedef T* pointer_types; // ill-formed; T is a parameter pack. 1413 /// }; 1414 /// \endcode 1415 /// 1416 /// Note that this routine does not specify which 1417 bool containsUnexpandedParameterPack() const { 1418 return TypeBits.ContainsUnexpandedParameterPack; 1419 } 1420 1421 /// Determines if this type would be canonical if it had no further 1422 /// qualification. 1423 bool isCanonicalUnqualified() const { 1424 return CanonicalType == QualType(this, 0); 1425 } 1426 1427 /// Pull a single level of sugar off of this locally-unqualified type. 1428 /// Users should generally prefer SplitQualType::getSingleStepDesugaredType() 1429 /// or QualType::getSingleStepDesugaredType(const ASTContext&). 1430 QualType getLocallyUnqualifiedSingleStepDesugaredType() const; 1431 1432 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 1433 /// object types, function types, and incomplete types. 1434 1435 /// isIncompleteType - Return true if this is an incomplete type. 1436 /// A type that can describe objects, but which lacks information needed to 1437 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 1438 /// routine will need to determine if the size is actually required. 1439 /// 1440 /// \brief Def If non-NULL, and the type refers to some kind of declaration 1441 /// that can be completed (such as a C struct, C++ class, or Objective-C 1442 /// class), will be set to the declaration. 1443 bool isIncompleteType(NamedDecl **Def = 0) const; 1444 1445 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 1446 /// type, in other words, not a function type. 1447 bool isIncompleteOrObjectType() const { 1448 return !isFunctionType(); 1449 } 1450 1451 /// \brief Determine whether this type is an object type. 1452 bool isObjectType() const { 1453 // C++ [basic.types]p8: 1454 // An object type is a (possibly cv-qualified) type that is not a 1455 // function type, not a reference type, and not a void type. 1456 return !isReferenceType() && !isFunctionType() && !isVoidType(); 1457 } 1458 1459 /// isLiteralType - Return true if this is a literal type 1460 /// (C++11 [basic.types]p10) 1461 bool isLiteralType(ASTContext &Ctx) const; 1462 1463 /// \brief Test if this type is a standard-layout type. 1464 /// (C++0x [basic.type]p9) 1465 bool isStandardLayoutType() const; 1466 1467 /// Helper methods to distinguish type categories. All type predicates 1468 /// operate on the canonical type, ignoring typedefs and qualifiers. 1469 1470 /// isBuiltinType - returns true if the type is a builtin type. 1471 bool isBuiltinType() const; 1472 1473 /// isSpecificBuiltinType - Test for a particular builtin type. 1474 bool isSpecificBuiltinType(unsigned K) const; 1475 1476 /// isPlaceholderType - Test for a type which does not represent an 1477 /// actual type-system type but is instead used as a placeholder for 1478 /// various convenient purposes within Clang. All such types are 1479 /// BuiltinTypes. 1480 bool isPlaceholderType() const; 1481 const BuiltinType *getAsPlaceholderType() const; 1482 1483 /// isSpecificPlaceholderType - Test for a specific placeholder type. 1484 bool isSpecificPlaceholderType(unsigned K) const; 1485 1486 /// isNonOverloadPlaceholderType - Test for a placeholder type 1487 /// other than Overload; see BuiltinType::isNonOverloadPlaceholderType. 1488 bool isNonOverloadPlaceholderType() const; 1489 1490 /// isIntegerType() does *not* include complex integers (a GCC extension). 1491 /// isComplexIntegerType() can be used to test for complex integers. 1492 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 1493 bool isEnumeralType() const; 1494 bool isBooleanType() const; 1495 bool isCharType() const; 1496 bool isWideCharType() const; 1497 bool isChar16Type() const; 1498 bool isChar32Type() const; 1499 bool isAnyCharacterType() const; 1500 bool isIntegralType(ASTContext &Ctx) const; 1501 1502 /// \brief Determine whether this type is an integral or enumeration type. 1503 bool isIntegralOrEnumerationType() const; 1504 /// \brief Determine whether this type is an integral or unscoped enumeration 1505 /// type. 1506 bool isIntegralOrUnscopedEnumerationType() const; 1507 1508 /// Floating point categories. 1509 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 1510 /// isComplexType() does *not* include complex integers (a GCC extension). 1511 /// isComplexIntegerType() can be used to test for complex integers. 1512 bool isComplexType() const; // C99 6.2.5p11 (complex) 1513 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 1514 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 1515 bool isHalfType() const; // OpenCL 6.1.1.1, NEON (IEEE 754-2008 half) 1516 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 1517 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 1518 bool isVoidType() const; // C99 6.2.5p19 1519 bool isDerivedType() const; // C99 6.2.5p20 1520 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 1521 bool isAggregateType() const; 1522 bool isFundamentalType() const; 1523 bool isCompoundType() const; 1524 1525 // Type Predicates: Check to see if this type is structurally the specified 1526 // type, ignoring typedefs and qualifiers. 1527 bool isFunctionType() const; 1528 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 1529 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 1530 bool isPointerType() const; 1531 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 1532 bool isBlockPointerType() const; 1533 bool isVoidPointerType() const; 1534 bool isReferenceType() const; 1535 bool isLValueReferenceType() const; 1536 bool isRValueReferenceType() const; 1537 bool isFunctionPointerType() const; 1538 bool isMemberPointerType() const; 1539 bool isMemberFunctionPointerType() const; 1540 bool isMemberDataPointerType() const; 1541 bool isArrayType() const; 1542 bool isConstantArrayType() const; 1543 bool isIncompleteArrayType() const; 1544 bool isVariableArrayType() const; 1545 bool isDependentSizedArrayType() const; 1546 bool isRecordType() const; 1547 bool isClassType() const; 1548 bool isStructureType() const; 1549 bool isInterfaceType() const; 1550 bool isStructureOrClassType() const; 1551 bool isUnionType() const; 1552 bool isComplexIntegerType() const; // GCC _Complex integer type. 1553 bool isVectorType() const; // GCC vector type. 1554 bool isExtVectorType() const; // Extended vector type. 1555 bool isObjCObjectPointerType() const; // pointer to ObjC object 1556 bool isObjCRetainableType() const; // ObjC object or block pointer 1557 bool isObjCLifetimeType() const; // (array of)* retainable type 1558 bool isObjCIndirectLifetimeType() const; // (pointer to)* lifetime type 1559 bool isObjCNSObjectType() const; // __attribute__((NSObject)) 1560 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 1561 // for the common case. 1562 bool isObjCObjectType() const; // NSString or typeof(*(id)0) 1563 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 1564 bool isObjCQualifiedIdType() const; // id<foo> 1565 bool isObjCQualifiedClassType() const; // Class<foo> 1566 bool isObjCObjectOrInterfaceType() const; 1567 bool isObjCIdType() const; // id 1568 bool isObjCClassType() const; // Class 1569 bool isObjCSelType() const; // Class 1570 bool isObjCBuiltinType() const; // 'id' or 'Class' 1571 bool isObjCARCBridgableType() const; 1572 bool isCARCBridgableType() const; 1573 bool isTemplateTypeParmType() const; // C++ template type parameter 1574 bool isNullPtrType() const; // C++0x nullptr_t 1575 bool isAtomicType() const; // C11 _Atomic() 1576 1577 bool isImage1dT() const; // OpenCL image1d_t 1578 bool isImage1dArrayT() const; // OpenCL image1d_array_t 1579 bool isImage1dBufferT() const; // OpenCL image1d_buffer_t 1580 bool isImage2dT() const; // OpenCL image2d_t 1581 bool isImage2dArrayT() const; // OpenCL image2d_array_t 1582 bool isImage3dT() const; // OpenCL image3d_t 1583 1584 bool isImageType() const; // Any OpenCL image type 1585 1586 bool isSamplerT() const; // OpenCL sampler_t 1587 bool isEventT() const; // OpenCL event_t 1588 1589 bool isOpenCLSpecificType() const; // Any OpenCL specific type 1590 1591 /// Determines if this type, which must satisfy 1592 /// isObjCLifetimeType(), is implicitly __unsafe_unretained rather 1593 /// than implicitly __strong. 1594 bool isObjCARCImplicitlyUnretainedType() const; 1595 1596 /// Return the implicit lifetime for this type, which must not be dependent. 1597 Qualifiers::ObjCLifetime getObjCARCImplicitLifetime() const; 1598 1599 enum ScalarTypeKind { 1600 STK_CPointer, 1601 STK_BlockPointer, 1602 STK_ObjCObjectPointer, 1603 STK_MemberPointer, 1604 STK_Bool, 1605 STK_Integral, 1606 STK_Floating, 1607 STK_IntegralComplex, 1608 STK_FloatingComplex 1609 }; 1610 /// getScalarTypeKind - Given that this is a scalar type, classify it. 1611 ScalarTypeKind getScalarTypeKind() const; 1612 1613 /// isDependentType - Whether this type is a dependent type, meaning 1614 /// that its definition somehow depends on a template parameter 1615 /// (C++ [temp.dep.type]). 1616 bool isDependentType() const { return TypeBits.Dependent; } 1617 1618 /// \brief Determine whether this type is an instantiation-dependent type, 1619 /// meaning that the type involves a template parameter (even if the 1620 /// definition does not actually depend on the type substituted for that 1621 /// template parameter). 1622 bool isInstantiationDependentType() const { 1623 return TypeBits.InstantiationDependent; 1624 } 1625 1626 /// \brief Determine whether this type is an undeduced type, meaning that 1627 /// it somehow involves a C++11 'auto' type which has not yet been deduced. 1628 bool isUndeducedType() const; 1629 1630 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 1631 bool isVariablyModifiedType() const { return TypeBits.VariablyModified; } 1632 1633 /// \brief Whether this type involves a variable-length array type 1634 /// with a definite size. 1635 bool hasSizedVLAType() const; 1636 1637 /// \brief Whether this type is or contains a local or unnamed type. 1638 bool hasUnnamedOrLocalType() const; 1639 1640 bool isOverloadableType() const; 1641 1642 /// \brief Determine wither this type is a C++ elaborated-type-specifier. 1643 bool isElaboratedTypeSpecifier() const; 1644 1645 bool canDecayToPointerType() const; 1646 1647 /// hasPointerRepresentation - Whether this type is represented 1648 /// natively as a pointer; this includes pointers, references, block 1649 /// pointers, and Objective-C interface, qualified id, and qualified 1650 /// interface types, as well as nullptr_t. 1651 bool hasPointerRepresentation() const; 1652 1653 /// hasObjCPointerRepresentation - Whether this type can represent 1654 /// an objective pointer type for the purpose of GC'ability 1655 bool hasObjCPointerRepresentation() const; 1656 1657 /// \brief Determine whether this type has an integer representation 1658 /// of some sort, e.g., it is an integer type or a vector. 1659 bool hasIntegerRepresentation() const; 1660 1661 /// \brief Determine whether this type has an signed integer representation 1662 /// of some sort, e.g., it is an signed integer type or a vector. 1663 bool hasSignedIntegerRepresentation() const; 1664 1665 /// \brief Determine whether this type has an unsigned integer representation 1666 /// of some sort, e.g., it is an unsigned integer type or a vector. 1667 bool hasUnsignedIntegerRepresentation() const; 1668 1669 /// \brief Determine whether this type has a floating-point representation 1670 /// of some sort, e.g., it is a floating-point type or a vector thereof. 1671 bool hasFloatingRepresentation() const; 1672 1673 // Type Checking Functions: Check to see if this type is structurally the 1674 // specified type, ignoring typedefs and qualifiers, and return a pointer to 1675 // the best type we can. 1676 const RecordType *getAsStructureType() const; 1677 /// NOTE: getAs*ArrayType are methods on ASTContext. 1678 const RecordType *getAsUnionType() const; 1679 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 1680 // The following is a convenience method that returns an ObjCObjectPointerType 1681 // for object declared using an interface. 1682 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 1683 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 1684 const ObjCObjectPointerType *getAsObjCQualifiedClassType() const; 1685 const ObjCObjectType *getAsObjCQualifiedInterfaceType() const; 1686 1687 /// \brief Retrieves the CXXRecordDecl that this type refers to, either 1688 /// because the type is a RecordType or because it is the injected-class-name 1689 /// type of a class template or class template partial specialization. 1690 CXXRecordDecl *getAsCXXRecordDecl() const; 1691 1692 /// If this is a pointer or reference to a RecordType, return the 1693 /// CXXRecordDecl that that type refers to. 1694 /// 1695 /// If this is not a pointer or reference, or the type being pointed to does 1696 /// not refer to a CXXRecordDecl, returns NULL. 1697 const CXXRecordDecl *getPointeeCXXRecordDecl() const; 1698 1699 /// \brief Get the AutoType whose type will be deduced for a variable with 1700 /// an initializer of this type. This looks through declarators like pointer 1701 /// types, but not through decltype or typedefs. 1702 AutoType *getContainedAutoType() const; 1703 1704 /// Member-template getAs<specific type>'. Look through sugar for 1705 /// an instance of \<specific type>. This scheme will eventually 1706 /// replace the specific getAsXXXX methods above. 1707 /// 1708 /// There are some specializations of this member template listed 1709 /// immediately following this class. 1710 template <typename T> const T *getAs() const; 1711 1712 /// A variant of getAs<> for array types which silently discards 1713 /// qualifiers from the outermost type. 1714 const ArrayType *getAsArrayTypeUnsafe() const; 1715 1716 /// Member-template castAs<specific type>. Look through sugar for 1717 /// the underlying instance of \<specific type>. 1718 /// 1719 /// This method has the same relationship to getAs<T> as cast<T> has 1720 /// to dyn_cast<T>; which is to say, the underlying type *must* 1721 /// have the intended type, and this method will never return null. 1722 template <typename T> const T *castAs() const; 1723 1724 /// A variant of castAs<> for array type which silently discards 1725 /// qualifiers from the outermost type. 1726 const ArrayType *castAsArrayTypeUnsafe() const; 1727 1728 /// getBaseElementTypeUnsafe - Get the base element type of this 1729 /// type, potentially discarding type qualifiers. This method 1730 /// should never be used when type qualifiers are meaningful. 1731 const Type *getBaseElementTypeUnsafe() const; 1732 1733 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 1734 /// element type of the array, potentially with type qualifiers missing. 1735 /// This method should never be used when type qualifiers are meaningful. 1736 const Type *getArrayElementTypeNoTypeQual() const; 1737 1738 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 1739 /// pointer, this returns the respective pointee. 1740 QualType getPointeeType() const; 1741 1742 /// getUnqualifiedDesugaredType() - Return the specified type with 1743 /// any "sugar" removed from the type, removing any typedefs, 1744 /// typeofs, etc., as well as any qualifiers. 1745 const Type *getUnqualifiedDesugaredType() const; 1746 1747 /// More type predicates useful for type checking/promotion 1748 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 1749 1750 /// isSignedIntegerType - Return true if this is an integer type that is 1751 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 1752 /// or an enum decl which has a signed representation. 1753 bool isSignedIntegerType() const; 1754 1755 /// isUnsignedIntegerType - Return true if this is an integer type that is 1756 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], 1757 /// or an enum decl which has an unsigned representation. 1758 bool isUnsignedIntegerType() const; 1759 1760 /// Determines whether this is an integer type that is signed or an 1761 /// enumeration types whose underlying type is a signed integer type. 1762 bool isSignedIntegerOrEnumerationType() const; 1763 1764 /// Determines whether this is an integer type that is unsigned or an 1765 /// enumeration types whose underlying type is a unsigned integer type. 1766 bool isUnsignedIntegerOrEnumerationType() const; 1767 1768 /// isConstantSizeType - Return true if this is not a variable sized type, 1769 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 1770 /// incomplete types. 1771 bool isConstantSizeType() const; 1772 1773 /// isSpecifierType - Returns true if this type can be represented by some 1774 /// set of type specifiers. 1775 bool isSpecifierType() const; 1776 1777 /// \brief Determine the linkage of this type. 1778 Linkage getLinkage() const; 1779 1780 /// \brief Determine the visibility of this type. 1781 Visibility getVisibility() const { 1782 return getLinkageAndVisibility().getVisibility(); 1783 } 1784 1785 /// \brief Return true if the visibility was explicitly set is the code. 1786 bool isVisibilityExplicit() const { 1787 return getLinkageAndVisibility().isVisibilityExplicit(); 1788 } 1789 1790 /// \brief Determine the linkage and visibility of this type. 1791 LinkageInfo getLinkageAndVisibility() const; 1792 1793 /// \brief True if the computed linkage is valid. Used for consistency 1794 /// checking. Should always return true. 1795 bool isLinkageValid() const; 1796 1797 const char *getTypeClassName() const; 1798 1799 QualType getCanonicalTypeInternal() const { 1800 return CanonicalType; 1801 } 1802 CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h 1803 LLVM_ATTRIBUTE_USED void dump() const; 1804 1805 friend class ASTReader; 1806 friend class ASTWriter; 1807}; 1808 1809/// \brief This will check for a TypedefType by removing any existing sugar 1810/// until it reaches a TypedefType or a non-sugared type. 1811template <> const TypedefType *Type::getAs() const; 1812 1813/// \brief This will check for a TemplateSpecializationType by removing any 1814/// existing sugar until it reaches a TemplateSpecializationType or a 1815/// non-sugared type. 1816template <> const TemplateSpecializationType *Type::getAs() const; 1817 1818// We can do canonical leaf types faster, because we don't have to 1819// worry about preserving child type decoration. 1820#define TYPE(Class, Base) 1821#define LEAF_TYPE(Class) \ 1822template <> inline const Class##Type *Type::getAs() const { \ 1823 return dyn_cast<Class##Type>(CanonicalType); \ 1824} \ 1825template <> inline const Class##Type *Type::castAs() const { \ 1826 return cast<Class##Type>(CanonicalType); \ 1827} 1828#include "clang/AST/TypeNodes.def" 1829 1830 1831/// BuiltinType - This class is used for builtin types like 'int'. Builtin 1832/// types are always canonical and have a literal name field. 1833class BuiltinType : public Type { 1834public: 1835 enum Kind { 1836#define BUILTIN_TYPE(Id, SingletonId) Id, 1837#define LAST_BUILTIN_TYPE(Id) LastKind = Id 1838#include "clang/AST/BuiltinTypes.def" 1839 }; 1840 1841public: 1842 BuiltinType(Kind K) 1843 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent), 1844 /*InstantiationDependent=*/(K == Dependent), 1845 /*VariablyModified=*/false, 1846 /*Unexpanded paramter pack=*/false) { 1847 BuiltinTypeBits.Kind = K; 1848 } 1849 1850 Kind getKind() const { return static_cast<Kind>(BuiltinTypeBits.Kind); } 1851 StringRef getName(const PrintingPolicy &Policy) const; 1852 const char *getNameAsCString(const PrintingPolicy &Policy) const { 1853 // The StringRef is null-terminated. 1854 StringRef str = getName(Policy); 1855 assert(!str.empty() && str.data()[str.size()] == '\0'); 1856 return str.data(); 1857 } 1858 1859 bool isSugared() const { return false; } 1860 QualType desugar() const { return QualType(this, 0); } 1861 1862 bool isInteger() const { 1863 return getKind() >= Bool && getKind() <= Int128; 1864 } 1865 1866 bool isSignedInteger() const { 1867 return getKind() >= Char_S && getKind() <= Int128; 1868 } 1869 1870 bool isUnsignedInteger() const { 1871 return getKind() >= Bool && getKind() <= UInt128; 1872 } 1873 1874 bool isFloatingPoint() const { 1875 return getKind() >= Half && getKind() <= LongDouble; 1876 } 1877 1878 /// Determines whether the given kind corresponds to a placeholder type. 1879 static bool isPlaceholderTypeKind(Kind K) { 1880 return K >= Overload; 1881 } 1882 1883 /// Determines whether this type is a placeholder type, i.e. a type 1884 /// which cannot appear in arbitrary positions in a fully-formed 1885 /// expression. 1886 bool isPlaceholderType() const { 1887 return isPlaceholderTypeKind(getKind()); 1888 } 1889 1890 /// Determines whether this type is a placeholder type other than 1891 /// Overload. Most placeholder types require only syntactic 1892 /// information about their context in order to be resolved (e.g. 1893 /// whether it is a call expression), which means they can (and 1894 /// should) be resolved in an earlier "phase" of analysis. 1895 /// Overload expressions sometimes pick up further information 1896 /// from their context, like whether the context expects a 1897 /// specific function-pointer type, and so frequently need 1898 /// special treatment. 1899 bool isNonOverloadPlaceholderType() const { 1900 return getKind() > Overload; 1901 } 1902 1903 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1904}; 1905 1906/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1907/// types (_Complex float etc) as well as the GCC integer complex extensions. 1908/// 1909class ComplexType : public Type, public llvm::FoldingSetNode { 1910 QualType ElementType; 1911 ComplexType(QualType Element, QualType CanonicalPtr) : 1912 Type(Complex, CanonicalPtr, Element->isDependentType(), 1913 Element->isInstantiationDependentType(), 1914 Element->isVariablyModifiedType(), 1915 Element->containsUnexpandedParameterPack()), 1916 ElementType(Element) { 1917 } 1918 friend class ASTContext; // ASTContext creates these. 1919 1920public: 1921 QualType getElementType() const { return ElementType; } 1922 1923 bool isSugared() const { return false; } 1924 QualType desugar() const { return QualType(this, 0); } 1925 1926 void Profile(llvm::FoldingSetNodeID &ID) { 1927 Profile(ID, getElementType()); 1928 } 1929 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1930 ID.AddPointer(Element.getAsOpaquePtr()); 1931 } 1932 1933 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1934}; 1935 1936/// ParenType - Sugar for parentheses used when specifying types. 1937/// 1938class ParenType : public Type, public llvm::FoldingSetNode { 1939 QualType Inner; 1940 1941 ParenType(QualType InnerType, QualType CanonType) : 1942 Type(Paren, CanonType, InnerType->isDependentType(), 1943 InnerType->isInstantiationDependentType(), 1944 InnerType->isVariablyModifiedType(), 1945 InnerType->containsUnexpandedParameterPack()), 1946 Inner(InnerType) { 1947 } 1948 friend class ASTContext; // ASTContext creates these. 1949 1950public: 1951 1952 QualType getInnerType() const { return Inner; } 1953 1954 bool isSugared() const { return true; } 1955 QualType desugar() const { return getInnerType(); } 1956 1957 void Profile(llvm::FoldingSetNodeID &ID) { 1958 Profile(ID, getInnerType()); 1959 } 1960 static void Profile(llvm::FoldingSetNodeID &ID, QualType Inner) { 1961 Inner.Profile(ID); 1962 } 1963 1964 static bool classof(const Type *T) { return T->getTypeClass() == Paren; } 1965}; 1966 1967/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1968/// 1969class PointerType : public Type, public llvm::FoldingSetNode { 1970 QualType PointeeType; 1971 1972 PointerType(QualType Pointee, QualType CanonicalPtr) : 1973 Type(Pointer, CanonicalPtr, Pointee->isDependentType(), 1974 Pointee->isInstantiationDependentType(), 1975 Pointee->isVariablyModifiedType(), 1976 Pointee->containsUnexpandedParameterPack()), 1977 PointeeType(Pointee) { 1978 } 1979 friend class ASTContext; // ASTContext creates these. 1980 1981public: 1982 1983 QualType getPointeeType() const { return PointeeType; } 1984 1985 bool isSugared() const { return false; } 1986 QualType desugar() const { return QualType(this, 0); } 1987 1988 void Profile(llvm::FoldingSetNodeID &ID) { 1989 Profile(ID, getPointeeType()); 1990 } 1991 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1992 ID.AddPointer(Pointee.getAsOpaquePtr()); 1993 } 1994 1995 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1996}; 1997 1998/// BlockPointerType - pointer to a block type. 1999/// This type is to represent types syntactically represented as 2000/// "void (^)(int)", etc. Pointee is required to always be a function type. 2001/// 2002class BlockPointerType : public Type, public llvm::FoldingSetNode { 2003 QualType PointeeType; // Block is some kind of pointer type 2004 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 2005 Type(BlockPointer, CanonicalCls, Pointee->isDependentType(), 2006 Pointee->isInstantiationDependentType(), 2007 Pointee->isVariablyModifiedType(), 2008 Pointee->containsUnexpandedParameterPack()), 2009 PointeeType(Pointee) { 2010 } 2011 friend class ASTContext; // ASTContext creates these. 2012 2013public: 2014 2015 // Get the pointee type. Pointee is required to always be a function type. 2016 QualType getPointeeType() const { return PointeeType; } 2017 2018 bool isSugared() const { return false; } 2019 QualType desugar() const { return QualType(this, 0); } 2020 2021 void Profile(llvm::FoldingSetNodeID &ID) { 2022 Profile(ID, getPointeeType()); 2023 } 2024 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 2025 ID.AddPointer(Pointee.getAsOpaquePtr()); 2026 } 2027 2028 static bool classof(const Type *T) { 2029 return T->getTypeClass() == BlockPointer; 2030 } 2031}; 2032 2033/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 2034/// 2035class ReferenceType : public Type, public llvm::FoldingSetNode { 2036 QualType PointeeType; 2037 2038protected: 2039 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 2040 bool SpelledAsLValue) : 2041 Type(tc, CanonicalRef, Referencee->isDependentType(), 2042 Referencee->isInstantiationDependentType(), 2043 Referencee->isVariablyModifiedType(), 2044 Referencee->containsUnexpandedParameterPack()), 2045 PointeeType(Referencee) 2046 { 2047 ReferenceTypeBits.SpelledAsLValue = SpelledAsLValue; 2048 ReferenceTypeBits.InnerRef = Referencee->isReferenceType(); 2049 } 2050 2051public: 2052 bool isSpelledAsLValue() const { return ReferenceTypeBits.SpelledAsLValue; } 2053 bool isInnerRef() const { return ReferenceTypeBits.InnerRef; } 2054 2055 QualType getPointeeTypeAsWritten() const { return PointeeType; } 2056 QualType getPointeeType() const { 2057 // FIXME: this might strip inner qualifiers; okay? 2058 const ReferenceType *T = this; 2059 while (T->isInnerRef()) 2060 T = T->PointeeType->castAs<ReferenceType>(); 2061 return T->PointeeType; 2062 } 2063 2064 void Profile(llvm::FoldingSetNodeID &ID) { 2065 Profile(ID, PointeeType, isSpelledAsLValue()); 2066 } 2067 static void Profile(llvm::FoldingSetNodeID &ID, 2068 QualType Referencee, 2069 bool SpelledAsLValue) { 2070 ID.AddPointer(Referencee.getAsOpaquePtr()); 2071 ID.AddBoolean(SpelledAsLValue); 2072 } 2073 2074 static bool classof(const Type *T) { 2075 return T->getTypeClass() == LValueReference || 2076 T->getTypeClass() == RValueReference; 2077 } 2078}; 2079 2080/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 2081/// 2082class LValueReferenceType : public ReferenceType { 2083 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 2084 bool SpelledAsLValue) : 2085 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 2086 {} 2087 friend class ASTContext; // ASTContext creates these 2088public: 2089 bool isSugared() const { return false; } 2090 QualType desugar() const { return QualType(this, 0); } 2091 2092 static bool classof(const Type *T) { 2093 return T->getTypeClass() == LValueReference; 2094 } 2095}; 2096 2097/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 2098/// 2099class RValueReferenceType : public ReferenceType { 2100 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 2101 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 2102 } 2103 friend class ASTContext; // ASTContext creates these 2104public: 2105 bool isSugared() const { return false; } 2106 QualType desugar() const { return QualType(this, 0); } 2107 2108 static bool classof(const Type *T) { 2109 return T->getTypeClass() == RValueReference; 2110 } 2111}; 2112 2113/// MemberPointerType - C++ 8.3.3 - Pointers to members 2114/// 2115class MemberPointerType : public Type, public llvm::FoldingSetNode { 2116 QualType PointeeType; 2117 /// The class of which the pointee is a member. Must ultimately be a 2118 /// RecordType, but could be a typedef or a template parameter too. 2119 const Type *Class; 2120 2121 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 2122 Type(MemberPointer, CanonicalPtr, 2123 Cls->isDependentType() || Pointee->isDependentType(), 2124 (Cls->isInstantiationDependentType() || 2125 Pointee->isInstantiationDependentType()), 2126 Pointee->isVariablyModifiedType(), 2127 (Cls->containsUnexpandedParameterPack() || 2128 Pointee->containsUnexpandedParameterPack())), 2129 PointeeType(Pointee), Class(Cls) { 2130 } 2131 friend class ASTContext; // ASTContext creates these. 2132 2133public: 2134 QualType getPointeeType() const { return PointeeType; } 2135 2136 /// Returns true if the member type (i.e. the pointee type) is a 2137 /// function type rather than a data-member type. 2138 bool isMemberFunctionPointer() const { 2139 return PointeeType->isFunctionProtoType(); 2140 } 2141 2142 /// Returns true if the member type (i.e. the pointee type) is a 2143 /// data type rather than a function type. 2144 bool isMemberDataPointer() const { 2145 return !PointeeType->isFunctionProtoType(); 2146 } 2147 2148 const Type *getClass() const { return Class; } 2149 2150 bool isSugared() const { return false; } 2151 QualType desugar() const { return QualType(this, 0); } 2152 2153 void Profile(llvm::FoldingSetNodeID &ID) { 2154 Profile(ID, getPointeeType(), getClass()); 2155 } 2156 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 2157 const Type *Class) { 2158 ID.AddPointer(Pointee.getAsOpaquePtr()); 2159 ID.AddPointer(Class); 2160 } 2161 2162 static bool classof(const Type *T) { 2163 return T->getTypeClass() == MemberPointer; 2164 } 2165}; 2166 2167/// ArrayType - C99 6.7.5.2 - Array Declarators. 2168/// 2169class ArrayType : public Type, public llvm::FoldingSetNode { 2170public: 2171 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 2172 /// an array with a static size (e.g. int X[static 4]), or an array 2173 /// with a star size (e.g. int X[*]). 2174 /// 'static' is only allowed on function parameters. 2175 enum ArraySizeModifier { 2176 Normal, Static, Star 2177 }; 2178private: 2179 /// ElementType - The element type of the array. 2180 QualType ElementType; 2181 2182protected: 2183 // C++ [temp.dep.type]p1: 2184 // A type is dependent if it is... 2185 // - an array type constructed from any dependent type or whose 2186 // size is specified by a constant expression that is 2187 // value-dependent, 2188 ArrayType(TypeClass tc, QualType et, QualType can, 2189 ArraySizeModifier sm, unsigned tq, 2190 bool ContainsUnexpandedParameterPack) 2191 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray, 2192 et->isInstantiationDependentType() || tc == DependentSizedArray, 2193 (tc == VariableArray || et->isVariablyModifiedType()), 2194 ContainsUnexpandedParameterPack), 2195 ElementType(et) { 2196 ArrayTypeBits.IndexTypeQuals = tq; 2197 ArrayTypeBits.SizeModifier = sm; 2198 } 2199 2200 friend class ASTContext; // ASTContext creates these. 2201 2202public: 2203 QualType getElementType() const { return ElementType; } 2204 ArraySizeModifier getSizeModifier() const { 2205 return ArraySizeModifier(ArrayTypeBits.SizeModifier); 2206 } 2207 Qualifiers getIndexTypeQualifiers() const { 2208 return Qualifiers::fromCVRMask(getIndexTypeCVRQualifiers()); 2209 } 2210 unsigned getIndexTypeCVRQualifiers() const { 2211 return ArrayTypeBits.IndexTypeQuals; 2212 } 2213 2214 static bool classof(const Type *T) { 2215 return T->getTypeClass() == ConstantArray || 2216 T->getTypeClass() == VariableArray || 2217 T->getTypeClass() == IncompleteArray || 2218 T->getTypeClass() == DependentSizedArray; 2219 } 2220}; 2221 2222/// ConstantArrayType - This class represents the canonical version of 2223/// C arrays with a specified constant size. For example, the canonical 2224/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 2225/// type is 'int' and the size is 404. 2226class ConstantArrayType : public ArrayType { 2227 llvm::APInt Size; // Allows us to unique the type. 2228 2229 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 2230 ArraySizeModifier sm, unsigned tq) 2231 : ArrayType(ConstantArray, et, can, sm, tq, 2232 et->containsUnexpandedParameterPack()), 2233 Size(size) {} 2234protected: 2235 ConstantArrayType(TypeClass tc, QualType et, QualType can, 2236 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 2237 : ArrayType(tc, et, can, sm, tq, et->containsUnexpandedParameterPack()), 2238 Size(size) {} 2239 friend class ASTContext; // ASTContext creates these. 2240public: 2241 const llvm::APInt &getSize() const { return Size; } 2242 bool isSugared() const { return false; } 2243 QualType desugar() const { return QualType(this, 0); } 2244 2245 2246 /// \brief Determine the number of bits required to address a member of 2247 // an array with the given element type and number of elements. 2248 static unsigned getNumAddressingBits(ASTContext &Context, 2249 QualType ElementType, 2250 const llvm::APInt &NumElements); 2251 2252 /// \brief Determine the maximum number of active bits that an array's size 2253 /// can require, which limits the maximum size of the array. 2254 static unsigned getMaxSizeBits(ASTContext &Context); 2255 2256 void Profile(llvm::FoldingSetNodeID &ID) { 2257 Profile(ID, getElementType(), getSize(), 2258 getSizeModifier(), getIndexTypeCVRQualifiers()); 2259 } 2260 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 2261 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 2262 unsigned TypeQuals) { 2263 ID.AddPointer(ET.getAsOpaquePtr()); 2264 ID.AddInteger(ArraySize.getZExtValue()); 2265 ID.AddInteger(SizeMod); 2266 ID.AddInteger(TypeQuals); 2267 } 2268 static bool classof(const Type *T) { 2269 return T->getTypeClass() == ConstantArray; 2270 } 2271}; 2272 2273/// IncompleteArrayType - This class represents C arrays with an unspecified 2274/// size. For example 'int A[]' has an IncompleteArrayType where the element 2275/// type is 'int' and the size is unspecified. 2276class IncompleteArrayType : public ArrayType { 2277 2278 IncompleteArrayType(QualType et, QualType can, 2279 ArraySizeModifier sm, unsigned tq) 2280 : ArrayType(IncompleteArray, et, can, sm, tq, 2281 et->containsUnexpandedParameterPack()) {} 2282 friend class ASTContext; // ASTContext creates these. 2283public: 2284 bool isSugared() const { return false; } 2285 QualType desugar() const { return QualType(this, 0); } 2286 2287 static bool classof(const Type *T) { 2288 return T->getTypeClass() == IncompleteArray; 2289 } 2290 2291 friend class StmtIteratorBase; 2292 2293 void Profile(llvm::FoldingSetNodeID &ID) { 2294 Profile(ID, getElementType(), getSizeModifier(), 2295 getIndexTypeCVRQualifiers()); 2296 } 2297 2298 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 2299 ArraySizeModifier SizeMod, unsigned TypeQuals) { 2300 ID.AddPointer(ET.getAsOpaquePtr()); 2301 ID.AddInteger(SizeMod); 2302 ID.AddInteger(TypeQuals); 2303 } 2304}; 2305 2306/// VariableArrayType - This class represents C arrays with a specified size 2307/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 2308/// Since the size expression is an arbitrary expression, we store it as such. 2309/// 2310/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 2311/// should not be: two lexically equivalent variable array types could mean 2312/// different things, for example, these variables do not have the same type 2313/// dynamically: 2314/// 2315/// void foo(int x) { 2316/// int Y[x]; 2317/// ++x; 2318/// int Z[x]; 2319/// } 2320/// 2321class VariableArrayType : public ArrayType { 2322 /// SizeExpr - An assignment expression. VLA's are only permitted within 2323 /// a function block. 2324 Stmt *SizeExpr; 2325 /// Brackets - The left and right array brackets. 2326 SourceRange Brackets; 2327 2328 VariableArrayType(QualType et, QualType can, Expr *e, 2329 ArraySizeModifier sm, unsigned tq, 2330 SourceRange brackets) 2331 : ArrayType(VariableArray, et, can, sm, tq, 2332 et->containsUnexpandedParameterPack()), 2333 SizeExpr((Stmt*) e), Brackets(brackets) {} 2334 friend class ASTContext; // ASTContext creates these. 2335 2336public: 2337 Expr *getSizeExpr() const { 2338 // We use C-style casts instead of cast<> here because we do not wish 2339 // to have a dependency of Type.h on Stmt.h/Expr.h. 2340 return (Expr*) SizeExpr; 2341 } 2342 SourceRange getBracketsRange() const { return Brackets; } 2343 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 2344 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 2345 2346 bool isSugared() const { return false; } 2347 QualType desugar() const { return QualType(this, 0); } 2348 2349 static bool classof(const Type *T) { 2350 return T->getTypeClass() == VariableArray; 2351 } 2352 2353 friend class StmtIteratorBase; 2354 2355 void Profile(llvm::FoldingSetNodeID &ID) { 2356 llvm_unreachable("Cannot unique VariableArrayTypes."); 2357 } 2358}; 2359 2360/// DependentSizedArrayType - This type represents an array type in 2361/// C++ whose size is a value-dependent expression. For example: 2362/// 2363/// \code 2364/// template<typename T, int Size> 2365/// class array { 2366/// T data[Size]; 2367/// }; 2368/// \endcode 2369/// 2370/// For these types, we won't actually know what the array bound is 2371/// until template instantiation occurs, at which point this will 2372/// become either a ConstantArrayType or a VariableArrayType. 2373class DependentSizedArrayType : public ArrayType { 2374 const ASTContext &Context; 2375 2376 /// \brief An assignment expression that will instantiate to the 2377 /// size of the array. 2378 /// 2379 /// The expression itself might be NULL, in which case the array 2380 /// type will have its size deduced from an initializer. 2381 Stmt *SizeExpr; 2382 2383 /// Brackets - The left and right array brackets. 2384 SourceRange Brackets; 2385 2386 DependentSizedArrayType(const ASTContext &Context, QualType et, QualType can, 2387 Expr *e, ArraySizeModifier sm, unsigned tq, 2388 SourceRange brackets); 2389 2390 friend class ASTContext; // ASTContext creates these. 2391 2392public: 2393 Expr *getSizeExpr() const { 2394 // We use C-style casts instead of cast<> here because we do not wish 2395 // to have a dependency of Type.h on Stmt.h/Expr.h. 2396 return (Expr*) SizeExpr; 2397 } 2398 SourceRange getBracketsRange() const { return Brackets; } 2399 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 2400 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 2401 2402 bool isSugared() const { return false; } 2403 QualType desugar() const { return QualType(this, 0); } 2404 2405 static bool classof(const Type *T) { 2406 return T->getTypeClass() == DependentSizedArray; 2407 } 2408 2409 friend class StmtIteratorBase; 2410 2411 2412 void Profile(llvm::FoldingSetNodeID &ID) { 2413 Profile(ID, Context, getElementType(), 2414 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 2415 } 2416 2417 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2418 QualType ET, ArraySizeModifier SizeMod, 2419 unsigned TypeQuals, Expr *E); 2420}; 2421 2422/// DependentSizedExtVectorType - This type represent an extended vector type 2423/// where either the type or size is dependent. For example: 2424/// @code 2425/// template<typename T, int Size> 2426/// class vector { 2427/// typedef T __attribute__((ext_vector_type(Size))) type; 2428/// } 2429/// @endcode 2430class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 2431 const ASTContext &Context; 2432 Expr *SizeExpr; 2433 /// ElementType - The element type of the array. 2434 QualType ElementType; 2435 SourceLocation loc; 2436 2437 DependentSizedExtVectorType(const ASTContext &Context, QualType ElementType, 2438 QualType can, Expr *SizeExpr, SourceLocation loc); 2439 2440 friend class ASTContext; 2441 2442public: 2443 Expr *getSizeExpr() const { return SizeExpr; } 2444 QualType getElementType() const { return ElementType; } 2445 SourceLocation getAttributeLoc() const { return loc; } 2446 2447 bool isSugared() const { return false; } 2448 QualType desugar() const { return QualType(this, 0); } 2449 2450 static bool classof(const Type *T) { 2451 return T->getTypeClass() == DependentSizedExtVector; 2452 } 2453 2454 void Profile(llvm::FoldingSetNodeID &ID) { 2455 Profile(ID, Context, getElementType(), getSizeExpr()); 2456 } 2457 2458 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2459 QualType ElementType, Expr *SizeExpr); 2460}; 2461 2462 2463/// VectorType - GCC generic vector type. This type is created using 2464/// __attribute__((vector_size(n)), where "n" specifies the vector size in 2465/// bytes; or from an Altivec __vector or vector declaration. 2466/// Since the constructor takes the number of vector elements, the 2467/// client is responsible for converting the size into the number of elements. 2468class VectorType : public Type, public llvm::FoldingSetNode { 2469public: 2470 enum VectorKind { 2471 GenericVector, // not a target-specific vector type 2472 AltiVecVector, // is AltiVec vector 2473 AltiVecPixel, // is AltiVec 'vector Pixel' 2474 AltiVecBool, // is AltiVec 'vector bool ...' 2475 NeonVector, // is ARM Neon vector 2476 NeonPolyVector // is ARM Neon polynomial vector 2477 }; 2478protected: 2479 /// ElementType - The element type of the vector. 2480 QualType ElementType; 2481 2482 VectorType(QualType vecType, unsigned nElements, QualType canonType, 2483 VectorKind vecKind); 2484 2485 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 2486 QualType canonType, VectorKind vecKind); 2487 2488 friend class ASTContext; // ASTContext creates these. 2489 2490public: 2491 2492 QualType getElementType() const { return ElementType; } 2493 unsigned getNumElements() const { return VectorTypeBits.NumElements; } 2494 2495 bool isSugared() const { return false; } 2496 QualType desugar() const { return QualType(this, 0); } 2497 2498 VectorKind getVectorKind() const { 2499 return VectorKind(VectorTypeBits.VecKind); 2500 } 2501 2502 void Profile(llvm::FoldingSetNodeID &ID) { 2503 Profile(ID, getElementType(), getNumElements(), 2504 getTypeClass(), getVectorKind()); 2505 } 2506 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 2507 unsigned NumElements, TypeClass TypeClass, 2508 VectorKind VecKind) { 2509 ID.AddPointer(ElementType.getAsOpaquePtr()); 2510 ID.AddInteger(NumElements); 2511 ID.AddInteger(TypeClass); 2512 ID.AddInteger(VecKind); 2513 } 2514 2515 static bool classof(const Type *T) { 2516 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 2517 } 2518}; 2519 2520/// ExtVectorType - Extended vector type. This type is created using 2521/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 2522/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 2523/// class enables syntactic extensions, like Vector Components for accessing 2524/// points, colors, and textures (modeled after OpenGL Shading Language). 2525class ExtVectorType : public VectorType { 2526 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 2527 VectorType(ExtVector, vecType, nElements, canonType, GenericVector) {} 2528 friend class ASTContext; // ASTContext creates these. 2529public: 2530 static int getPointAccessorIdx(char c) { 2531 switch (c) { 2532 default: return -1; 2533 case 'x': return 0; 2534 case 'y': return 1; 2535 case 'z': return 2; 2536 case 'w': return 3; 2537 } 2538 } 2539 static int getNumericAccessorIdx(char c) { 2540 switch (c) { 2541 default: return -1; 2542 case '0': return 0; 2543 case '1': return 1; 2544 case '2': return 2; 2545 case '3': return 3; 2546 case '4': return 4; 2547 case '5': return 5; 2548 case '6': return 6; 2549 case '7': return 7; 2550 case '8': return 8; 2551 case '9': return 9; 2552 case 'A': 2553 case 'a': return 10; 2554 case 'B': 2555 case 'b': return 11; 2556 case 'C': 2557 case 'c': return 12; 2558 case 'D': 2559 case 'd': return 13; 2560 case 'E': 2561 case 'e': return 14; 2562 case 'F': 2563 case 'f': return 15; 2564 } 2565 } 2566 2567 static int getAccessorIdx(char c) { 2568 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 2569 return getNumericAccessorIdx(c); 2570 } 2571 2572 bool isAccessorWithinNumElements(char c) const { 2573 if (int idx = getAccessorIdx(c)+1) 2574 return unsigned(idx-1) < getNumElements(); 2575 return false; 2576 } 2577 bool isSugared() const { return false; } 2578 QualType desugar() const { return QualType(this, 0); } 2579 2580 static bool classof(const Type *T) { 2581 return T->getTypeClass() == ExtVector; 2582 } 2583}; 2584 2585/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 2586/// class of FunctionNoProtoType and FunctionProtoType. 2587/// 2588class FunctionType : public Type { 2589 // The type returned by the function. 2590 QualType ResultType; 2591 2592 public: 2593 /// ExtInfo - A class which abstracts out some details necessary for 2594 /// making a call. 2595 /// 2596 /// It is not actually used directly for storing this information in 2597 /// a FunctionType, although FunctionType does currently use the 2598 /// same bit-pattern. 2599 /// 2600 // If you add a field (say Foo), other than the obvious places (both, 2601 // constructors, compile failures), what you need to update is 2602 // * Operator== 2603 // * getFoo 2604 // * withFoo 2605 // * functionType. Add Foo, getFoo. 2606 // * ASTContext::getFooType 2607 // * ASTContext::mergeFunctionTypes 2608 // * FunctionNoProtoType::Profile 2609 // * FunctionProtoType::Profile 2610 // * TypePrinter::PrintFunctionProto 2611 // * AST read and write 2612 // * Codegen 2613 class ExtInfo { 2614 // Feel free to rearrange or add bits, but if you go over 9, 2615 // you'll need to adjust both the Bits field below and 2616 // Type::FunctionTypeBitfields. 2617 2618 // | CC |noreturn|produces|regparm| 2619 // |0 .. 3| 4 | 5 | 6 .. 8| 2620 // 2621 // regparm is either 0 (no regparm attribute) or the regparm value+1. 2622 enum { CallConvMask = 0xF }; 2623 enum { NoReturnMask = 0x10 }; 2624 enum { ProducesResultMask = 0x20 }; 2625 enum { RegParmMask = ~(CallConvMask | NoReturnMask | ProducesResultMask), 2626 RegParmOffset = 6 }; // Assumed to be the last field 2627 2628 uint16_t Bits; 2629 2630 ExtInfo(unsigned Bits) : Bits(static_cast<uint16_t>(Bits)) {} 2631 2632 friend class FunctionType; 2633 2634 public: 2635 // Constructor with no defaults. Use this when you know that you 2636 // have all the elements (when reading an AST file for example). 2637 ExtInfo(bool noReturn, bool hasRegParm, unsigned regParm, CallingConv cc, 2638 bool producesResult) { 2639 assert((!hasRegParm || regParm < 7) && "Invalid regparm value"); 2640 Bits = ((unsigned) cc) | 2641 (noReturn ? NoReturnMask : 0) | 2642 (producesResult ? ProducesResultMask : 0) | 2643 (hasRegParm ? ((regParm + 1) << RegParmOffset) : 0); 2644 } 2645 2646 // Constructor with all defaults. Use when for example creating a 2647 // function know to use defaults. 2648 ExtInfo() : Bits(0) {} 2649 2650 bool getNoReturn() const { return Bits & NoReturnMask; } 2651 bool getProducesResult() const { return Bits & ProducesResultMask; } 2652 bool getHasRegParm() const { return (Bits >> RegParmOffset) != 0; } 2653 unsigned getRegParm() const { 2654 unsigned RegParm = Bits >> RegParmOffset; 2655 if (RegParm > 0) 2656 --RegParm; 2657 return RegParm; 2658 } 2659 CallingConv getCC() const { return CallingConv(Bits & CallConvMask); } 2660 2661 bool operator==(ExtInfo Other) const { 2662 return Bits == Other.Bits; 2663 } 2664 bool operator!=(ExtInfo Other) const { 2665 return Bits != Other.Bits; 2666 } 2667 2668 // Note that we don't have setters. That is by design, use 2669 // the following with methods instead of mutating these objects. 2670 2671 ExtInfo withNoReturn(bool noReturn) const { 2672 if (noReturn) 2673 return ExtInfo(Bits | NoReturnMask); 2674 else 2675 return ExtInfo(Bits & ~NoReturnMask); 2676 } 2677 2678 ExtInfo withProducesResult(bool producesResult) const { 2679 if (producesResult) 2680 return ExtInfo(Bits | ProducesResultMask); 2681 else 2682 return ExtInfo(Bits & ~ProducesResultMask); 2683 } 2684 2685 ExtInfo withRegParm(unsigned RegParm) const { 2686 assert(RegParm < 7 && "Invalid regparm value"); 2687 return ExtInfo((Bits & ~RegParmMask) | 2688 ((RegParm + 1) << RegParmOffset)); 2689 } 2690 2691 ExtInfo withCallingConv(CallingConv cc) const { 2692 return ExtInfo((Bits & ~CallConvMask) | (unsigned) cc); 2693 } 2694 2695 void Profile(llvm::FoldingSetNodeID &ID) const { 2696 ID.AddInteger(Bits); 2697 } 2698 }; 2699 2700protected: 2701 FunctionType(TypeClass tc, QualType res, 2702 unsigned typeQuals, QualType Canonical, bool Dependent, 2703 bool InstantiationDependent, 2704 bool VariablyModified, bool ContainsUnexpandedParameterPack, 2705 ExtInfo Info) 2706 : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified, 2707 ContainsUnexpandedParameterPack), 2708 ResultType(res) { 2709 FunctionTypeBits.ExtInfo = Info.Bits; 2710 FunctionTypeBits.TypeQuals = typeQuals; 2711 } 2712 unsigned getTypeQuals() const { return FunctionTypeBits.TypeQuals; } 2713 2714public: 2715 2716 QualType getResultType() const { return ResultType; } 2717 2718 bool getHasRegParm() const { return getExtInfo().getHasRegParm(); } 2719 unsigned getRegParmType() const { return getExtInfo().getRegParm(); } 2720 /// \brief Determine whether this function type includes the GNU noreturn 2721 /// attribute. The C++11 [[noreturn]] attribute does not affect the function 2722 /// type. 2723 bool getNoReturnAttr() const { return getExtInfo().getNoReturn(); } 2724 CallingConv getCallConv() const { return getExtInfo().getCC(); } 2725 ExtInfo getExtInfo() const { return ExtInfo(FunctionTypeBits.ExtInfo); } 2726 bool isConst() const { return getTypeQuals() & Qualifiers::Const; } 2727 bool isVolatile() const { return getTypeQuals() & Qualifiers::Volatile; } 2728 bool isRestrict() const { return getTypeQuals() & Qualifiers::Restrict; } 2729 2730 /// \brief Determine the type of an expression that calls a function of 2731 /// this type. 2732 QualType getCallResultType(ASTContext &Context) const { 2733 return getResultType().getNonLValueExprType(Context); 2734 } 2735 2736 static StringRef getNameForCallConv(CallingConv CC); 2737 2738 static bool classof(const Type *T) { 2739 return T->getTypeClass() == FunctionNoProto || 2740 T->getTypeClass() == FunctionProto; 2741 } 2742}; 2743 2744/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 2745/// no information available about its arguments. 2746class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 2747 FunctionNoProtoType(QualType Result, QualType Canonical, ExtInfo Info) 2748 : FunctionType(FunctionNoProto, Result, 0, Canonical, 2749 /*Dependent=*/false, /*InstantiationDependent=*/false, 2750 Result->isVariablyModifiedType(), 2751 /*ContainsUnexpandedParameterPack=*/false, Info) {} 2752 2753 friend class ASTContext; // ASTContext creates these. 2754 2755public: 2756 // No additional state past what FunctionType provides. 2757 2758 bool isSugared() const { return false; } 2759 QualType desugar() const { return QualType(this, 0); } 2760 2761 void Profile(llvm::FoldingSetNodeID &ID) { 2762 Profile(ID, getResultType(), getExtInfo()); 2763 } 2764 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 2765 ExtInfo Info) { 2766 Info.Profile(ID); 2767 ID.AddPointer(ResultType.getAsOpaquePtr()); 2768 } 2769 2770 static bool classof(const Type *T) { 2771 return T->getTypeClass() == FunctionNoProto; 2772 } 2773}; 2774 2775/// FunctionProtoType - Represents a prototype with argument type info, e.g. 2776/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 2777/// arguments, not as having a single void argument. Such a type can have an 2778/// exception specification, but this specification is not part of the canonical 2779/// type. 2780class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 2781public: 2782 /// ExtProtoInfo - Extra information about a function prototype. 2783 struct ExtProtoInfo { 2784 ExtProtoInfo() : 2785 Variadic(false), HasTrailingReturn(false), TypeQuals(0), 2786 ExceptionSpecType(EST_None), RefQualifier(RQ_None), 2787 NumExceptions(0), Exceptions(0), NoexceptExpr(0), 2788 ExceptionSpecDecl(0), ExceptionSpecTemplate(0), 2789 ConsumedArguments(0) {} 2790 2791 FunctionType::ExtInfo ExtInfo; 2792 bool Variadic : 1; 2793 bool HasTrailingReturn : 1; 2794 unsigned char TypeQuals; 2795 ExceptionSpecificationType ExceptionSpecType; 2796 RefQualifierKind RefQualifier; 2797 unsigned NumExceptions; 2798 const QualType *Exceptions; 2799 Expr *NoexceptExpr; 2800 FunctionDecl *ExceptionSpecDecl; 2801 FunctionDecl *ExceptionSpecTemplate; 2802 const bool *ConsumedArguments; 2803 }; 2804 2805private: 2806 /// \brief Determine whether there are any argument types that 2807 /// contain an unexpanded parameter pack. 2808 static bool containsAnyUnexpandedParameterPack(const QualType *ArgArray, 2809 unsigned numArgs) { 2810 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 2811 if (ArgArray[Idx]->containsUnexpandedParameterPack()) 2812 return true; 2813 2814 return false; 2815 } 2816 2817 FunctionProtoType(QualType result, ArrayRef<QualType> args, 2818 QualType canonical, const ExtProtoInfo &epi); 2819 2820 /// NumArgs - The number of arguments this function has, not counting '...'. 2821 unsigned NumArgs : 15; 2822 2823 /// NumExceptions - The number of types in the exception spec, if any. 2824 unsigned NumExceptions : 9; 2825 2826 /// ExceptionSpecType - The type of exception specification this function has. 2827 unsigned ExceptionSpecType : 3; 2828 2829 /// HasAnyConsumedArgs - Whether this function has any consumed arguments. 2830 unsigned HasAnyConsumedArgs : 1; 2831 2832 /// Variadic - Whether the function is variadic. 2833 unsigned Variadic : 1; 2834 2835 /// HasTrailingReturn - Whether this function has a trailing return type. 2836 unsigned HasTrailingReturn : 1; 2837 2838 /// \brief The ref-qualifier associated with a \c FunctionProtoType. 2839 /// 2840 /// This is a value of type \c RefQualifierKind. 2841 unsigned RefQualifier : 2; 2842 2843 // ArgInfo - There is an variable size array after the class in memory that 2844 // holds the argument types. 2845 2846 // Exceptions - There is another variable size array after ArgInfo that 2847 // holds the exception types. 2848 2849 // NoexceptExpr - Instead of Exceptions, there may be a single Expr* pointing 2850 // to the expression in the noexcept() specifier. 2851 2852 // ExceptionSpecDecl, ExceptionSpecTemplate - Instead of Exceptions, there may 2853 // be a pair of FunctionDecl* pointing to the function which should be used to 2854 // instantiate this function type's exception specification, and the function 2855 // from which it should be instantiated. 2856 2857 // ConsumedArgs - A variable size array, following Exceptions 2858 // and of length NumArgs, holding flags indicating which arguments 2859 // are consumed. This only appears if HasAnyConsumedArgs is true. 2860 2861 friend class ASTContext; // ASTContext creates these. 2862 2863 const bool *getConsumedArgsBuffer() const { 2864 assert(hasAnyConsumedArgs()); 2865 2866 // Find the end of the exceptions. 2867 Expr * const *eh_end = reinterpret_cast<Expr * const *>(arg_type_end()); 2868 if (getExceptionSpecType() != EST_ComputedNoexcept) 2869 eh_end += NumExceptions; 2870 else 2871 eh_end += 1; // NoexceptExpr 2872 2873 return reinterpret_cast<const bool*>(eh_end); 2874 } 2875 2876public: 2877 unsigned getNumArgs() const { return NumArgs; } 2878 QualType getArgType(unsigned i) const { 2879 assert(i < NumArgs && "Invalid argument number!"); 2880 return arg_type_begin()[i]; 2881 } 2882 ArrayRef<QualType> getArgTypes() const { 2883 return ArrayRef<QualType>(arg_type_begin(), arg_type_end()); 2884 } 2885 2886 ExtProtoInfo getExtProtoInfo() const { 2887 ExtProtoInfo EPI; 2888 EPI.ExtInfo = getExtInfo(); 2889 EPI.Variadic = isVariadic(); 2890 EPI.HasTrailingReturn = hasTrailingReturn(); 2891 EPI.ExceptionSpecType = getExceptionSpecType(); 2892 EPI.TypeQuals = static_cast<unsigned char>(getTypeQuals()); 2893 EPI.RefQualifier = getRefQualifier(); 2894 if (EPI.ExceptionSpecType == EST_Dynamic) { 2895 EPI.NumExceptions = NumExceptions; 2896 EPI.Exceptions = exception_begin(); 2897 } else if (EPI.ExceptionSpecType == EST_ComputedNoexcept) { 2898 EPI.NoexceptExpr = getNoexceptExpr(); 2899 } else if (EPI.ExceptionSpecType == EST_Uninstantiated) { 2900 EPI.ExceptionSpecDecl = getExceptionSpecDecl(); 2901 EPI.ExceptionSpecTemplate = getExceptionSpecTemplate(); 2902 } else if (EPI.ExceptionSpecType == EST_Unevaluated) { 2903 EPI.ExceptionSpecDecl = getExceptionSpecDecl(); 2904 } 2905 if (hasAnyConsumedArgs()) 2906 EPI.ConsumedArguments = getConsumedArgsBuffer(); 2907 return EPI; 2908 } 2909 2910 /// \brief Get the kind of exception specification on this function. 2911 ExceptionSpecificationType getExceptionSpecType() const { 2912 return static_cast<ExceptionSpecificationType>(ExceptionSpecType); 2913 } 2914 /// \brief Return whether this function has any kind of exception spec. 2915 bool hasExceptionSpec() const { 2916 return getExceptionSpecType() != EST_None; 2917 } 2918 /// \brief Return whether this function has a dynamic (throw) exception spec. 2919 bool hasDynamicExceptionSpec() const { 2920 return isDynamicExceptionSpec(getExceptionSpecType()); 2921 } 2922 /// \brief Return whether this function has a noexcept exception spec. 2923 bool hasNoexceptExceptionSpec() const { 2924 return isNoexceptExceptionSpec(getExceptionSpecType()); 2925 } 2926 /// \brief Result type of getNoexceptSpec(). 2927 enum NoexceptResult { 2928 NR_NoNoexcept, ///< There is no noexcept specifier. 2929 NR_BadNoexcept, ///< The noexcept specifier has a bad expression. 2930 NR_Dependent, ///< The noexcept specifier is dependent. 2931 NR_Throw, ///< The noexcept specifier evaluates to false. 2932 NR_Nothrow ///< The noexcept specifier evaluates to true. 2933 }; 2934 /// \brief Get the meaning of the noexcept spec on this function, if any. 2935 NoexceptResult getNoexceptSpec(ASTContext &Ctx) const; 2936 unsigned getNumExceptions() const { return NumExceptions; } 2937 QualType getExceptionType(unsigned i) const { 2938 assert(i < NumExceptions && "Invalid exception number!"); 2939 return exception_begin()[i]; 2940 } 2941 Expr *getNoexceptExpr() const { 2942 if (getExceptionSpecType() != EST_ComputedNoexcept) 2943 return 0; 2944 // NoexceptExpr sits where the arguments end. 2945 return *reinterpret_cast<Expr *const *>(arg_type_end()); 2946 } 2947 /// \brief If this function type has an exception specification which hasn't 2948 /// been determined yet (either because it has not been evaluated or because 2949 /// it has not been instantiated), this is the function whose exception 2950 /// specification is represented by this type. 2951 FunctionDecl *getExceptionSpecDecl() const { 2952 if (getExceptionSpecType() != EST_Uninstantiated && 2953 getExceptionSpecType() != EST_Unevaluated) 2954 return 0; 2955 return reinterpret_cast<FunctionDecl * const *>(arg_type_end())[0]; 2956 } 2957 /// \brief If this function type has an uninstantiated exception 2958 /// specification, this is the function whose exception specification 2959 /// should be instantiated to find the exception specification for 2960 /// this type. 2961 FunctionDecl *getExceptionSpecTemplate() const { 2962 if (getExceptionSpecType() != EST_Uninstantiated) 2963 return 0; 2964 return reinterpret_cast<FunctionDecl * const *>(arg_type_end())[1]; 2965 } 2966 bool isNothrow(ASTContext &Ctx) const { 2967 ExceptionSpecificationType EST = getExceptionSpecType(); 2968 assert(EST != EST_Unevaluated && EST != EST_Uninstantiated); 2969 if (EST == EST_DynamicNone || EST == EST_BasicNoexcept) 2970 return true; 2971 if (EST != EST_ComputedNoexcept) 2972 return false; 2973 return getNoexceptSpec(Ctx) == NR_Nothrow; 2974 } 2975 2976 bool isVariadic() const { return Variadic; } 2977 2978 /// \brief Determines whether this function prototype contains a 2979 /// parameter pack at the end. 2980 /// 2981 /// A function template whose last parameter is a parameter pack can be 2982 /// called with an arbitrary number of arguments, much like a variadic 2983 /// function. 2984 bool isTemplateVariadic() const; 2985 2986 bool hasTrailingReturn() const { return HasTrailingReturn; } 2987 2988 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 2989 2990 2991 /// \brief Retrieve the ref-qualifier associated with this function type. 2992 RefQualifierKind getRefQualifier() const { 2993 return static_cast<RefQualifierKind>(RefQualifier); 2994 } 2995 2996 typedef const QualType *arg_type_iterator; 2997 arg_type_iterator arg_type_begin() const { 2998 return reinterpret_cast<const QualType *>(this+1); 2999 } 3000 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 3001 3002 typedef const QualType *exception_iterator; 3003 exception_iterator exception_begin() const { 3004 // exceptions begin where arguments end 3005 return arg_type_end(); 3006 } 3007 exception_iterator exception_end() const { 3008 if (getExceptionSpecType() != EST_Dynamic) 3009 return exception_begin(); 3010 return exception_begin() + NumExceptions; 3011 } 3012 3013 bool hasAnyConsumedArgs() const { 3014 return HasAnyConsumedArgs; 3015 } 3016 bool isArgConsumed(unsigned I) const { 3017 assert(I < getNumArgs() && "argument index out of range!"); 3018 if (hasAnyConsumedArgs()) 3019 return getConsumedArgsBuffer()[I]; 3020 return false; 3021 } 3022 3023 bool isSugared() const { return false; } 3024 QualType desugar() const { return QualType(this, 0); } 3025 3026 void printExceptionSpecification(raw_ostream &OS, 3027 const PrintingPolicy &Policy) const; 3028 3029 static bool classof(const Type *T) { 3030 return T->getTypeClass() == FunctionProto; 3031 } 3032 3033 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx); 3034 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 3035 arg_type_iterator ArgTys, unsigned NumArgs, 3036 const ExtProtoInfo &EPI, const ASTContext &Context); 3037}; 3038 3039 3040/// \brief Represents the dependent type named by a dependently-scoped 3041/// typename using declaration, e.g. 3042/// using typename Base<T>::foo; 3043/// Template instantiation turns these into the underlying type. 3044class UnresolvedUsingType : public Type { 3045 UnresolvedUsingTypenameDecl *Decl; 3046 3047 UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) 3048 : Type(UnresolvedUsing, QualType(), true, true, false, 3049 /*ContainsUnexpandedParameterPack=*/false), 3050 Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} 3051 friend class ASTContext; // ASTContext creates these. 3052public: 3053 3054 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 3055 3056 bool isSugared() const { return false; } 3057 QualType desugar() const { return QualType(this, 0); } 3058 3059 static bool classof(const Type *T) { 3060 return T->getTypeClass() == UnresolvedUsing; 3061 } 3062 3063 void Profile(llvm::FoldingSetNodeID &ID) { 3064 return Profile(ID, Decl); 3065 } 3066 static void Profile(llvm::FoldingSetNodeID &ID, 3067 UnresolvedUsingTypenameDecl *D) { 3068 ID.AddPointer(D); 3069 } 3070}; 3071 3072 3073class TypedefType : public Type { 3074 TypedefNameDecl *Decl; 3075protected: 3076 TypedefType(TypeClass tc, const TypedefNameDecl *D, QualType can) 3077 : Type(tc, can, can->isDependentType(), 3078 can->isInstantiationDependentType(), 3079 can->isVariablyModifiedType(), 3080 /*ContainsUnexpandedParameterPack=*/false), 3081 Decl(const_cast<TypedefNameDecl*>(D)) { 3082 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 3083 } 3084 friend class ASTContext; // ASTContext creates these. 3085public: 3086 3087 TypedefNameDecl *getDecl() const { return Decl; } 3088 3089 bool isSugared() const { return true; } 3090 QualType desugar() const; 3091 3092 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 3093}; 3094 3095/// TypeOfExprType (GCC extension). 3096class TypeOfExprType : public Type { 3097 Expr *TOExpr; 3098 3099protected: 3100 TypeOfExprType(Expr *E, QualType can = QualType()); 3101 friend class ASTContext; // ASTContext creates these. 3102public: 3103 Expr *getUnderlyingExpr() const { return TOExpr; } 3104 3105 /// \brief Remove a single level of sugar. 3106 QualType desugar() const; 3107 3108 /// \brief Returns whether this type directly provides sugar. 3109 bool isSugared() const; 3110 3111 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 3112}; 3113 3114/// \brief Internal representation of canonical, dependent 3115/// typeof(expr) types. 3116/// 3117/// This class is used internally by the ASTContext to manage 3118/// canonical, dependent types, only. Clients will only see instances 3119/// of this class via TypeOfExprType nodes. 3120class DependentTypeOfExprType 3121 : public TypeOfExprType, public llvm::FoldingSetNode { 3122 const ASTContext &Context; 3123 3124public: 3125 DependentTypeOfExprType(const ASTContext &Context, Expr *E) 3126 : TypeOfExprType(E), Context(Context) { } 3127 3128 void Profile(llvm::FoldingSetNodeID &ID) { 3129 Profile(ID, Context, getUnderlyingExpr()); 3130 } 3131 3132 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 3133 Expr *E); 3134}; 3135 3136/// TypeOfType (GCC extension). 3137class TypeOfType : public Type { 3138 QualType TOType; 3139 TypeOfType(QualType T, QualType can) 3140 : Type(TypeOf, can, T->isDependentType(), 3141 T->isInstantiationDependentType(), 3142 T->isVariablyModifiedType(), 3143 T->containsUnexpandedParameterPack()), 3144 TOType(T) { 3145 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 3146 } 3147 friend class ASTContext; // ASTContext creates these. 3148public: 3149 QualType getUnderlyingType() const { return TOType; } 3150 3151 /// \brief Remove a single level of sugar. 3152 QualType desugar() const { return getUnderlyingType(); } 3153 3154 /// \brief Returns whether this type directly provides sugar. 3155 bool isSugared() const { return true; } 3156 3157 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 3158}; 3159 3160/// DecltypeType (C++0x) 3161class DecltypeType : public Type { 3162 Expr *E; 3163 QualType UnderlyingType; 3164 3165protected: 3166 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 3167 friend class ASTContext; // ASTContext creates these. 3168public: 3169 Expr *getUnderlyingExpr() const { return E; } 3170 QualType getUnderlyingType() const { return UnderlyingType; } 3171 3172 /// \brief Remove a single level of sugar. 3173 QualType desugar() const; 3174 3175 /// \brief Returns whether this type directly provides sugar. 3176 bool isSugared() const; 3177 3178 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 3179}; 3180 3181/// \brief Internal representation of canonical, dependent 3182/// decltype(expr) types. 3183/// 3184/// This class is used internally by the ASTContext to manage 3185/// canonical, dependent types, only. Clients will only see instances 3186/// of this class via DecltypeType nodes. 3187class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 3188 const ASTContext &Context; 3189 3190public: 3191 DependentDecltypeType(const ASTContext &Context, Expr *E); 3192 3193 void Profile(llvm::FoldingSetNodeID &ID) { 3194 Profile(ID, Context, getUnderlyingExpr()); 3195 } 3196 3197 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 3198 Expr *E); 3199}; 3200 3201/// \brief A unary type transform, which is a type constructed from another 3202class UnaryTransformType : public Type { 3203public: 3204 enum UTTKind { 3205 EnumUnderlyingType 3206 }; 3207 3208private: 3209 /// The untransformed type. 3210 QualType BaseType; 3211 /// The transformed type if not dependent, otherwise the same as BaseType. 3212 QualType UnderlyingType; 3213 3214 UTTKind UKind; 3215protected: 3216 UnaryTransformType(QualType BaseTy, QualType UnderlyingTy, UTTKind UKind, 3217 QualType CanonicalTy); 3218 friend class ASTContext; 3219public: 3220 bool isSugared() const { return !isDependentType(); } 3221 QualType desugar() const { return UnderlyingType; } 3222 3223 QualType getUnderlyingType() const { return UnderlyingType; } 3224 QualType getBaseType() const { return BaseType; } 3225 3226 UTTKind getUTTKind() const { return UKind; } 3227 3228 static bool classof(const Type *T) { 3229 return T->getTypeClass() == UnaryTransform; 3230 } 3231}; 3232 3233class TagType : public Type { 3234 /// Stores the TagDecl associated with this type. The decl may point to any 3235 /// TagDecl that declares the entity. 3236 TagDecl * decl; 3237 3238 friend class ASTReader; 3239 3240protected: 3241 TagType(TypeClass TC, const TagDecl *D, QualType can); 3242 3243public: 3244 TagDecl *getDecl() const; 3245 3246 /// @brief Determines whether this type is in the process of being 3247 /// defined. 3248 bool isBeingDefined() const; 3249 3250 static bool classof(const Type *T) { 3251 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 3252 } 3253}; 3254 3255/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 3256/// to detect TagType objects of structs/unions/classes. 3257class RecordType : public TagType { 3258protected: 3259 explicit RecordType(const RecordDecl *D) 3260 : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3261 explicit RecordType(TypeClass TC, RecordDecl *D) 3262 : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3263 friend class ASTContext; // ASTContext creates these. 3264public: 3265 3266 RecordDecl *getDecl() const { 3267 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 3268 } 3269 3270 // FIXME: This predicate is a helper to QualType/Type. It needs to 3271 // recursively check all fields for const-ness. If any field is declared 3272 // const, it needs to return false. 3273 bool hasConstFields() const { return false; } 3274 3275 bool isSugared() const { return false; } 3276 QualType desugar() const { return QualType(this, 0); } 3277 3278 static bool classof(const Type *T) { return T->getTypeClass() == Record; } 3279}; 3280 3281/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 3282/// to detect TagType objects of enums. 3283class EnumType : public TagType { 3284 explicit EnumType(const EnumDecl *D) 3285 : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3286 friend class ASTContext; // ASTContext creates these. 3287public: 3288 3289 EnumDecl *getDecl() const { 3290 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 3291 } 3292 3293 bool isSugared() const { return false; } 3294 QualType desugar() const { return QualType(this, 0); } 3295 3296 static bool classof(const Type *T) { return T->getTypeClass() == Enum; } 3297}; 3298 3299/// AttributedType - An attributed type is a type to which a type 3300/// attribute has been applied. The "modified type" is the 3301/// fully-sugared type to which the attributed type was applied; 3302/// generally it is not canonically equivalent to the attributed type. 3303/// The "equivalent type" is the minimally-desugared type which the 3304/// type is canonically equivalent to. 3305/// 3306/// For example, in the following attributed type: 3307/// int32_t __attribute__((vector_size(16))) 3308/// - the modified type is the TypedefType for int32_t 3309/// - the equivalent type is VectorType(16, int32_t) 3310/// - the canonical type is VectorType(16, int) 3311class AttributedType : public Type, public llvm::FoldingSetNode { 3312public: 3313 // It is really silly to have yet another attribute-kind enum, but 3314 // clang::attr::Kind doesn't currently cover the pure type attrs. 3315 enum Kind { 3316 // Expression operand. 3317 attr_address_space, 3318 attr_regparm, 3319 attr_vector_size, 3320 attr_neon_vector_type, 3321 attr_neon_polyvector_type, 3322 3323 FirstExprOperandKind = attr_address_space, 3324 LastExprOperandKind = attr_neon_polyvector_type, 3325 3326 // Enumerated operand (string or keyword). 3327 attr_objc_gc, 3328 attr_objc_ownership, 3329 attr_pcs, 3330 3331 FirstEnumOperandKind = attr_objc_gc, 3332 LastEnumOperandKind = attr_pcs, 3333 3334 // No operand. 3335 attr_noreturn, 3336 attr_cdecl, 3337 attr_fastcall, 3338 attr_stdcall, 3339 attr_thiscall, 3340 attr_pascal, 3341 attr_pnaclcall, 3342 attr_inteloclbicc 3343 }; 3344 3345private: 3346 QualType ModifiedType; 3347 QualType EquivalentType; 3348 3349 friend class ASTContext; // creates these 3350 3351 AttributedType(QualType canon, Kind attrKind, 3352 QualType modified, QualType equivalent) 3353 : Type(Attributed, canon, canon->isDependentType(), 3354 canon->isInstantiationDependentType(), 3355 canon->isVariablyModifiedType(), 3356 canon->containsUnexpandedParameterPack()), 3357 ModifiedType(modified), EquivalentType(equivalent) { 3358 AttributedTypeBits.AttrKind = attrKind; 3359 } 3360 3361public: 3362 Kind getAttrKind() const { 3363 return static_cast<Kind>(AttributedTypeBits.AttrKind); 3364 } 3365 3366 QualType getModifiedType() const { return ModifiedType; } 3367 QualType getEquivalentType() const { return EquivalentType; } 3368 3369 bool isSugared() const { return true; } 3370 QualType desugar() const { return getEquivalentType(); } 3371 3372 void Profile(llvm::FoldingSetNodeID &ID) { 3373 Profile(ID, getAttrKind(), ModifiedType, EquivalentType); 3374 } 3375 3376 static void Profile(llvm::FoldingSetNodeID &ID, Kind attrKind, 3377 QualType modified, QualType equivalent) { 3378 ID.AddInteger(attrKind); 3379 ID.AddPointer(modified.getAsOpaquePtr()); 3380 ID.AddPointer(equivalent.getAsOpaquePtr()); 3381 } 3382 3383 static bool classof(const Type *T) { 3384 return T->getTypeClass() == Attributed; 3385 } 3386}; 3387 3388class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 3389 // Helper data collector for canonical types. 3390 struct CanonicalTTPTInfo { 3391 unsigned Depth : 15; 3392 unsigned ParameterPack : 1; 3393 unsigned Index : 16; 3394 }; 3395 3396 union { 3397 // Info for the canonical type. 3398 CanonicalTTPTInfo CanTTPTInfo; 3399 // Info for the non-canonical type. 3400 TemplateTypeParmDecl *TTPDecl; 3401 }; 3402 3403 /// Build a non-canonical type. 3404 TemplateTypeParmType(TemplateTypeParmDecl *TTPDecl, QualType Canon) 3405 : Type(TemplateTypeParm, Canon, /*Dependent=*/true, 3406 /*InstantiationDependent=*/true, 3407 /*VariablyModified=*/false, 3408 Canon->containsUnexpandedParameterPack()), 3409 TTPDecl(TTPDecl) { } 3410 3411 /// Build the canonical type. 3412 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 3413 : Type(TemplateTypeParm, QualType(this, 0), 3414 /*Dependent=*/true, 3415 /*InstantiationDependent=*/true, 3416 /*VariablyModified=*/false, PP) { 3417 CanTTPTInfo.Depth = D; 3418 CanTTPTInfo.Index = I; 3419 CanTTPTInfo.ParameterPack = PP; 3420 } 3421 3422 friend class ASTContext; // ASTContext creates these 3423 3424 const CanonicalTTPTInfo& getCanTTPTInfo() const { 3425 QualType Can = getCanonicalTypeInternal(); 3426 return Can->castAs<TemplateTypeParmType>()->CanTTPTInfo; 3427 } 3428 3429public: 3430 unsigned getDepth() const { return getCanTTPTInfo().Depth; } 3431 unsigned getIndex() const { return getCanTTPTInfo().Index; } 3432 bool isParameterPack() const { return getCanTTPTInfo().ParameterPack; } 3433 3434 TemplateTypeParmDecl *getDecl() const { 3435 return isCanonicalUnqualified() ? 0 : TTPDecl; 3436 } 3437 3438 IdentifierInfo *getIdentifier() const; 3439 3440 bool isSugared() const { return false; } 3441 QualType desugar() const { return QualType(this, 0); } 3442 3443 void Profile(llvm::FoldingSetNodeID &ID) { 3444 Profile(ID, getDepth(), getIndex(), isParameterPack(), getDecl()); 3445 } 3446 3447 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 3448 unsigned Index, bool ParameterPack, 3449 TemplateTypeParmDecl *TTPDecl) { 3450 ID.AddInteger(Depth); 3451 ID.AddInteger(Index); 3452 ID.AddBoolean(ParameterPack); 3453 ID.AddPointer(TTPDecl); 3454 } 3455 3456 static bool classof(const Type *T) { 3457 return T->getTypeClass() == TemplateTypeParm; 3458 } 3459}; 3460 3461/// \brief Represents the result of substituting a type for a template 3462/// type parameter. 3463/// 3464/// Within an instantiated template, all template type parameters have 3465/// been replaced with these. They are used solely to record that a 3466/// type was originally written as a template type parameter; 3467/// therefore they are never canonical. 3468class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 3469 // The original type parameter. 3470 const TemplateTypeParmType *Replaced; 3471 3472 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 3473 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType(), 3474 Canon->isInstantiationDependentType(), 3475 Canon->isVariablyModifiedType(), 3476 Canon->containsUnexpandedParameterPack()), 3477 Replaced(Param) { } 3478 3479 friend class ASTContext; 3480 3481public: 3482 /// Gets the template parameter that was substituted for. 3483 const TemplateTypeParmType *getReplacedParameter() const { 3484 return Replaced; 3485 } 3486 3487 /// Gets the type that was substituted for the template 3488 /// parameter. 3489 QualType getReplacementType() const { 3490 return getCanonicalTypeInternal(); 3491 } 3492 3493 bool isSugared() const { return true; } 3494 QualType desugar() const { return getReplacementType(); } 3495 3496 void Profile(llvm::FoldingSetNodeID &ID) { 3497 Profile(ID, getReplacedParameter(), getReplacementType()); 3498 } 3499 static void Profile(llvm::FoldingSetNodeID &ID, 3500 const TemplateTypeParmType *Replaced, 3501 QualType Replacement) { 3502 ID.AddPointer(Replaced); 3503 ID.AddPointer(Replacement.getAsOpaquePtr()); 3504 } 3505 3506 static bool classof(const Type *T) { 3507 return T->getTypeClass() == SubstTemplateTypeParm; 3508 } 3509}; 3510 3511/// \brief Represents the result of substituting a set of types for a template 3512/// type parameter pack. 3513/// 3514/// When a pack expansion in the source code contains multiple parameter packs 3515/// and those parameter packs correspond to different levels of template 3516/// parameter lists, this type node is used to represent a template type 3517/// parameter pack from an outer level, which has already had its argument pack 3518/// substituted but that still lives within a pack expansion that itself 3519/// could not be instantiated. When actually performing a substitution into 3520/// that pack expansion (e.g., when all template parameters have corresponding 3521/// arguments), this type will be replaced with the \c SubstTemplateTypeParmType 3522/// at the current pack substitution index. 3523class SubstTemplateTypeParmPackType : public Type, public llvm::FoldingSetNode { 3524 /// \brief The original type parameter. 3525 const TemplateTypeParmType *Replaced; 3526 3527 /// \brief A pointer to the set of template arguments that this 3528 /// parameter pack is instantiated with. 3529 const TemplateArgument *Arguments; 3530 3531 /// \brief The number of template arguments in \c Arguments. 3532 unsigned NumArguments; 3533 3534 SubstTemplateTypeParmPackType(const TemplateTypeParmType *Param, 3535 QualType Canon, 3536 const TemplateArgument &ArgPack); 3537 3538 friend class ASTContext; 3539 3540public: 3541 IdentifierInfo *getIdentifier() const { return Replaced->getIdentifier(); } 3542 3543 /// Gets the template parameter that was substituted for. 3544 const TemplateTypeParmType *getReplacedParameter() const { 3545 return Replaced; 3546 } 3547 3548 bool isSugared() const { return false; } 3549 QualType desugar() const { return QualType(this, 0); } 3550 3551 TemplateArgument getArgumentPack() const; 3552 3553 void Profile(llvm::FoldingSetNodeID &ID); 3554 static void Profile(llvm::FoldingSetNodeID &ID, 3555 const TemplateTypeParmType *Replaced, 3556 const TemplateArgument &ArgPack); 3557 3558 static bool classof(const Type *T) { 3559 return T->getTypeClass() == SubstTemplateTypeParmPack; 3560 } 3561}; 3562 3563/// \brief Represents a C++11 auto or C++1y decltype(auto) type. 3564/// 3565/// These types are usually a placeholder for a deduced type. However, before 3566/// the initializer is attached, or if the initializer is type-dependent, there 3567/// is no deduced type and an auto type is canonical. In the latter case, it is 3568/// also a dependent type. 3569class AutoType : public Type, public llvm::FoldingSetNode { 3570 AutoType(QualType DeducedType, bool IsDecltypeAuto, bool IsDependent) 3571 : Type(Auto, DeducedType.isNull() ? QualType(this, 0) : DeducedType, 3572 /*Dependent=*/IsDependent, /*InstantiationDependent=*/IsDependent, 3573 /*VariablyModified=*/false, /*ContainsParameterPack=*/false) { 3574 assert((DeducedType.isNull() || !IsDependent) && 3575 "auto deduced to dependent type"); 3576 AutoTypeBits.IsDecltypeAuto = IsDecltypeAuto; 3577 } 3578 3579 friend class ASTContext; // ASTContext creates these 3580 3581public: 3582 bool isDecltypeAuto() const { return AutoTypeBits.IsDecltypeAuto; } 3583 3584 bool isSugared() const { return !isCanonicalUnqualified(); } 3585 QualType desugar() const { return getCanonicalTypeInternal(); } 3586 3587 /// \brief Get the type deduced for this auto type, or null if it's either 3588 /// not been deduced or was deduced to a dependent type. 3589 QualType getDeducedType() const { 3590 return !isCanonicalUnqualified() ? getCanonicalTypeInternal() : QualType(); 3591 } 3592 bool isDeduced() const { 3593 return !isCanonicalUnqualified() || isDependentType(); 3594 } 3595 3596 void Profile(llvm::FoldingSetNodeID &ID) { 3597 Profile(ID, getDeducedType(), isDecltypeAuto(), isDependentType()); 3598 } 3599 3600 static void Profile(llvm::FoldingSetNodeID &ID, QualType Deduced, 3601 bool IsDecltypeAuto, bool IsDependent) { 3602 ID.AddPointer(Deduced.getAsOpaquePtr()); 3603 ID.AddBoolean(IsDecltypeAuto); 3604 ID.AddBoolean(IsDependent); 3605 } 3606 3607 static bool classof(const Type *T) { 3608 return T->getTypeClass() == Auto; 3609 } 3610}; 3611 3612/// \brief Represents a type template specialization; the template 3613/// must be a class template, a type alias template, or a template 3614/// template parameter. A template which cannot be resolved to one of 3615/// these, e.g. because it is written with a dependent scope 3616/// specifier, is instead represented as a 3617/// @c DependentTemplateSpecializationType. 3618/// 3619/// A non-dependent template specialization type is always "sugar", 3620/// typically for a @c RecordType. For example, a class template 3621/// specialization type of @c vector<int> will refer to a tag type for 3622/// the instantiation @c std::vector<int, std::allocator<int>> 3623/// 3624/// Template specializations are dependent if either the template or 3625/// any of the template arguments are dependent, in which case the 3626/// type may also be canonical. 3627/// 3628/// Instances of this type are allocated with a trailing array of 3629/// TemplateArguments, followed by a QualType representing the 3630/// non-canonical aliased type when the template is a type alias 3631/// template. 3632class TemplateSpecializationType 3633 : public Type, public llvm::FoldingSetNode { 3634 /// \brief The name of the template being specialized. This is 3635 /// either a TemplateName::Template (in which case it is a 3636 /// ClassTemplateDecl*, a TemplateTemplateParmDecl*, or a 3637 /// TypeAliasTemplateDecl*), a 3638 /// TemplateName::SubstTemplateTemplateParmPack, or a 3639 /// TemplateName::SubstTemplateTemplateParm (in which case the 3640 /// replacement must, recursively, be one of these). 3641 TemplateName Template; 3642 3643 /// \brief - The number of template arguments named in this class 3644 /// template specialization. 3645 unsigned NumArgs : 31; 3646 3647 /// \brief Whether this template specialization type is a substituted 3648 /// type alias. 3649 bool TypeAlias : 1; 3650 3651 TemplateSpecializationType(TemplateName T, 3652 const TemplateArgument *Args, 3653 unsigned NumArgs, QualType Canon, 3654 QualType Aliased); 3655 3656 friend class ASTContext; // ASTContext creates these 3657 3658public: 3659 /// \brief Determine whether any of the given template arguments are 3660 /// dependent. 3661 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 3662 unsigned NumArgs, 3663 bool &InstantiationDependent); 3664 3665 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 3666 unsigned NumArgs, 3667 bool &InstantiationDependent); 3668 3669 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &, 3670 bool &InstantiationDependent); 3671 3672 /// \brief Print a template argument list, including the '<' and '>' 3673 /// enclosing the template arguments. 3674 static void PrintTemplateArgumentList(raw_ostream &OS, 3675 const TemplateArgument *Args, 3676 unsigned NumArgs, 3677 const PrintingPolicy &Policy, 3678 bool SkipBrackets = false); 3679 3680 static void PrintTemplateArgumentList(raw_ostream &OS, 3681 const TemplateArgumentLoc *Args, 3682 unsigned NumArgs, 3683 const PrintingPolicy &Policy); 3684 3685 static void PrintTemplateArgumentList(raw_ostream &OS, 3686 const TemplateArgumentListInfo &, 3687 const PrintingPolicy &Policy); 3688 3689 /// True if this template specialization type matches a current 3690 /// instantiation in the context in which it is found. 3691 bool isCurrentInstantiation() const { 3692 return isa<InjectedClassNameType>(getCanonicalTypeInternal()); 3693 } 3694 3695 /// \brief Determine if this template specialization type is for a type alias 3696 /// template that has been substituted. 3697 /// 3698 /// Nearly every template specialization type whose template is an alias 3699 /// template will be substituted. However, this is not the case when 3700 /// the specialization contains a pack expansion but the template alias 3701 /// does not have a corresponding parameter pack, e.g., 3702 /// 3703 /// \code 3704 /// template<typename T, typename U, typename V> struct S; 3705 /// template<typename T, typename U> using A = S<T, int, U>; 3706 /// template<typename... Ts> struct X { 3707 /// typedef A<Ts...> type; // not a type alias 3708 /// }; 3709 /// \endcode 3710 bool isTypeAlias() const { return TypeAlias; } 3711 3712 /// Get the aliased type, if this is a specialization of a type alias 3713 /// template. 3714 QualType getAliasedType() const { 3715 assert(isTypeAlias() && "not a type alias template specialization"); 3716 return *reinterpret_cast<const QualType*>(end()); 3717 } 3718 3719 typedef const TemplateArgument * iterator; 3720 3721 iterator begin() const { return getArgs(); } 3722 iterator end() const; // defined inline in TemplateBase.h 3723 3724 /// \brief Retrieve the name of the template that we are specializing. 3725 TemplateName getTemplateName() const { return Template; } 3726 3727 /// \brief Retrieve the template arguments. 3728 const TemplateArgument *getArgs() const { 3729 return reinterpret_cast<const TemplateArgument *>(this + 1); 3730 } 3731 3732 /// \brief Retrieve the number of template arguments. 3733 unsigned getNumArgs() const { return NumArgs; } 3734 3735 /// \brief Retrieve a specific template argument as a type. 3736 /// \pre @c isArgType(Arg) 3737 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 3738 3739 bool isSugared() const { 3740 return !isDependentType() || isCurrentInstantiation() || isTypeAlias(); 3741 } 3742 QualType desugar() const { return getCanonicalTypeInternal(); } 3743 3744 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) { 3745 Profile(ID, Template, getArgs(), NumArgs, Ctx); 3746 if (isTypeAlias()) 3747 getAliasedType().Profile(ID); 3748 } 3749 3750 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 3751 const TemplateArgument *Args, 3752 unsigned NumArgs, 3753 const ASTContext &Context); 3754 3755 static bool classof(const Type *T) { 3756 return T->getTypeClass() == TemplateSpecialization; 3757 } 3758}; 3759 3760/// \brief The injected class name of a C++ class template or class 3761/// template partial specialization. Used to record that a type was 3762/// spelled with a bare identifier rather than as a template-id; the 3763/// equivalent for non-templated classes is just RecordType. 3764/// 3765/// Injected class name types are always dependent. Template 3766/// instantiation turns these into RecordTypes. 3767/// 3768/// Injected class name types are always canonical. This works 3769/// because it is impossible to compare an injected class name type 3770/// with the corresponding non-injected template type, for the same 3771/// reason that it is impossible to directly compare template 3772/// parameters from different dependent contexts: injected class name 3773/// types can only occur within the scope of a particular templated 3774/// declaration, and within that scope every template specialization 3775/// will canonicalize to the injected class name (when appropriate 3776/// according to the rules of the language). 3777class InjectedClassNameType : public Type { 3778 CXXRecordDecl *Decl; 3779 3780 /// The template specialization which this type represents. 3781 /// For example, in 3782 /// template <class T> class A { ... }; 3783 /// this is A<T>, whereas in 3784 /// template <class X, class Y> class A<B<X,Y> > { ... }; 3785 /// this is A<B<X,Y> >. 3786 /// 3787 /// It is always unqualified, always a template specialization type, 3788 /// and always dependent. 3789 QualType InjectedType; 3790 3791 friend class ASTContext; // ASTContext creates these. 3792 friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not 3793 // currently suitable for AST reading, too much 3794 // interdependencies. 3795 InjectedClassNameType(CXXRecordDecl *D, QualType TST) 3796 : Type(InjectedClassName, QualType(), /*Dependent=*/true, 3797 /*InstantiationDependent=*/true, 3798 /*VariablyModified=*/false, 3799 /*ContainsUnexpandedParameterPack=*/false), 3800 Decl(D), InjectedType(TST) { 3801 assert(isa<TemplateSpecializationType>(TST)); 3802 assert(!TST.hasQualifiers()); 3803 assert(TST->isDependentType()); 3804 } 3805 3806public: 3807 QualType getInjectedSpecializationType() const { return InjectedType; } 3808 const TemplateSpecializationType *getInjectedTST() const { 3809 return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); 3810 } 3811 3812 CXXRecordDecl *getDecl() const; 3813 3814 bool isSugared() const { return false; } 3815 QualType desugar() const { return QualType(this, 0); } 3816 3817 static bool classof(const Type *T) { 3818 return T->getTypeClass() == InjectedClassName; 3819 } 3820}; 3821 3822/// \brief The kind of a tag type. 3823enum TagTypeKind { 3824 /// \brief The "struct" keyword. 3825 TTK_Struct, 3826 /// \brief The "__interface" keyword. 3827 TTK_Interface, 3828 /// \brief The "union" keyword. 3829 TTK_Union, 3830 /// \brief The "class" keyword. 3831 TTK_Class, 3832 /// \brief The "enum" keyword. 3833 TTK_Enum 3834}; 3835 3836/// \brief The elaboration keyword that precedes a qualified type name or 3837/// introduces an elaborated-type-specifier. 3838enum ElaboratedTypeKeyword { 3839 /// \brief The "struct" keyword introduces the elaborated-type-specifier. 3840 ETK_Struct, 3841 /// \brief The "__interface" keyword introduces the elaborated-type-specifier. 3842 ETK_Interface, 3843 /// \brief The "union" keyword introduces the elaborated-type-specifier. 3844 ETK_Union, 3845 /// \brief The "class" keyword introduces the elaborated-type-specifier. 3846 ETK_Class, 3847 /// \brief The "enum" keyword introduces the elaborated-type-specifier. 3848 ETK_Enum, 3849 /// \brief The "typename" keyword precedes the qualified type name, e.g., 3850 /// \c typename T::type. 3851 ETK_Typename, 3852 /// \brief No keyword precedes the qualified type name. 3853 ETK_None 3854}; 3855 3856/// A helper class for Type nodes having an ElaboratedTypeKeyword. 3857/// The keyword in stored in the free bits of the base class. 3858/// Also provides a few static helpers for converting and printing 3859/// elaborated type keyword and tag type kind enumerations. 3860class TypeWithKeyword : public Type { 3861protected: 3862 TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, 3863 QualType Canonical, bool Dependent, 3864 bool InstantiationDependent, bool VariablyModified, 3865 bool ContainsUnexpandedParameterPack) 3866 : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified, 3867 ContainsUnexpandedParameterPack) { 3868 TypeWithKeywordBits.Keyword = Keyword; 3869 } 3870 3871public: 3872 ElaboratedTypeKeyword getKeyword() const { 3873 return static_cast<ElaboratedTypeKeyword>(TypeWithKeywordBits.Keyword); 3874 } 3875 3876 /// getKeywordForTypeSpec - Converts a type specifier (DeclSpec::TST) 3877 /// into an elaborated type keyword. 3878 static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); 3879 3880 /// getTagTypeKindForTypeSpec - Converts a type specifier (DeclSpec::TST) 3881 /// into a tag type kind. It is an error to provide a type specifier 3882 /// which *isn't* a tag kind here. 3883 static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); 3884 3885 /// getKeywordForTagDeclKind - Converts a TagTypeKind into an 3886 /// elaborated type keyword. 3887 static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); 3888 3889 /// getTagTypeKindForKeyword - Converts an elaborated type keyword into 3890 // a TagTypeKind. It is an error to provide an elaborated type keyword 3891 /// which *isn't* a tag kind here. 3892 static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); 3893 3894 static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); 3895 3896 static const char *getKeywordName(ElaboratedTypeKeyword Keyword); 3897 3898 static const char *getTagTypeKindName(TagTypeKind Kind) { 3899 return getKeywordName(getKeywordForTagTypeKind(Kind)); 3900 } 3901 3902 class CannotCastToThisType {}; 3903 static CannotCastToThisType classof(const Type *); 3904}; 3905 3906/// \brief Represents a type that was referred to using an elaborated type 3907/// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, 3908/// or both. 3909/// 3910/// This type is used to keep track of a type name as written in the 3911/// source code, including tag keywords and any nested-name-specifiers. 3912/// The type itself is always "sugar", used to express what was written 3913/// in the source code but containing no additional semantic information. 3914class ElaboratedType : public TypeWithKeyword, public llvm::FoldingSetNode { 3915 3916 /// \brief The nested name specifier containing the qualifier. 3917 NestedNameSpecifier *NNS; 3918 3919 /// \brief The type that this qualified name refers to. 3920 QualType NamedType; 3921 3922 ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3923 QualType NamedType, QualType CanonType) 3924 : TypeWithKeyword(Keyword, Elaborated, CanonType, 3925 NamedType->isDependentType(), 3926 NamedType->isInstantiationDependentType(), 3927 NamedType->isVariablyModifiedType(), 3928 NamedType->containsUnexpandedParameterPack()), 3929 NNS(NNS), NamedType(NamedType) { 3930 assert(!(Keyword == ETK_None && NNS == 0) && 3931 "ElaboratedType cannot have elaborated type keyword " 3932 "and name qualifier both null."); 3933 } 3934 3935 friend class ASTContext; // ASTContext creates these 3936 3937public: 3938 ~ElaboratedType(); 3939 3940 /// \brief Retrieve the qualification on this type. 3941 NestedNameSpecifier *getQualifier() const { return NNS; } 3942 3943 /// \brief Retrieve the type named by the qualified-id. 3944 QualType getNamedType() const { return NamedType; } 3945 3946 /// \brief Remove a single level of sugar. 3947 QualType desugar() const { return getNamedType(); } 3948 3949 /// \brief Returns whether this type directly provides sugar. 3950 bool isSugared() const { return true; } 3951 3952 void Profile(llvm::FoldingSetNodeID &ID) { 3953 Profile(ID, getKeyword(), NNS, NamedType); 3954 } 3955 3956 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3957 NestedNameSpecifier *NNS, QualType NamedType) { 3958 ID.AddInteger(Keyword); 3959 ID.AddPointer(NNS); 3960 NamedType.Profile(ID); 3961 } 3962 3963 static bool classof(const Type *T) { 3964 return T->getTypeClass() == Elaborated; 3965 } 3966}; 3967 3968/// \brief Represents a qualified type name for which the type name is 3969/// dependent. 3970/// 3971/// DependentNameType represents a class of dependent types that involve a 3972/// dependent nested-name-specifier (e.g., "T::") followed by a (dependent) 3973/// name of a type. The DependentNameType may start with a "typename" (for a 3974/// typename-specifier), "class", "struct", "union", or "enum" (for a 3975/// dependent elaborated-type-specifier), or nothing (in contexts where we 3976/// know that we must be referring to a type, e.g., in a base class specifier). 3977class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { 3978 3979 /// \brief The nested name specifier containing the qualifier. 3980 NestedNameSpecifier *NNS; 3981 3982 /// \brief The type that this typename specifier refers to. 3983 const IdentifierInfo *Name; 3984 3985 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3986 const IdentifierInfo *Name, QualType CanonType) 3987 : TypeWithKeyword(Keyword, DependentName, CanonType, /*Dependent=*/true, 3988 /*InstantiationDependent=*/true, 3989 /*VariablyModified=*/false, 3990 NNS->containsUnexpandedParameterPack()), 3991 NNS(NNS), Name(Name) { 3992 assert(NNS->isDependent() && 3993 "DependentNameType requires a dependent nested-name-specifier"); 3994 } 3995 3996 friend class ASTContext; // ASTContext creates these 3997 3998public: 3999 /// \brief Retrieve the qualification on this type. 4000 NestedNameSpecifier *getQualifier() const { return NNS; } 4001 4002 /// \brief Retrieve the type named by the typename specifier as an 4003 /// identifier. 4004 /// 4005 /// This routine will return a non-NULL identifier pointer when the 4006 /// form of the original typename was terminated by an identifier, 4007 /// e.g., "typename T::type". 4008 const IdentifierInfo *getIdentifier() const { 4009 return Name; 4010 } 4011 4012 bool isSugared() const { return false; } 4013 QualType desugar() const { return QualType(this, 0); } 4014 4015 void Profile(llvm::FoldingSetNodeID &ID) { 4016 Profile(ID, getKeyword(), NNS, Name); 4017 } 4018 4019 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 4020 NestedNameSpecifier *NNS, const IdentifierInfo *Name) { 4021 ID.AddInteger(Keyword); 4022 ID.AddPointer(NNS); 4023 ID.AddPointer(Name); 4024 } 4025 4026 static bool classof(const Type *T) { 4027 return T->getTypeClass() == DependentName; 4028 } 4029}; 4030 4031/// DependentTemplateSpecializationType - Represents a template 4032/// specialization type whose template cannot be resolved, e.g. 4033/// A<T>::template B<T> 4034class DependentTemplateSpecializationType : 4035 public TypeWithKeyword, public llvm::FoldingSetNode { 4036 4037 /// \brief The nested name specifier containing the qualifier. 4038 NestedNameSpecifier *NNS; 4039 4040 /// \brief The identifier of the template. 4041 const IdentifierInfo *Name; 4042 4043 /// \brief - The number of template arguments named in this class 4044 /// template specialization. 4045 unsigned NumArgs; 4046 4047 const TemplateArgument *getArgBuffer() const { 4048 return reinterpret_cast<const TemplateArgument*>(this+1); 4049 } 4050 TemplateArgument *getArgBuffer() { 4051 return reinterpret_cast<TemplateArgument*>(this+1); 4052 } 4053 4054 DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 4055 NestedNameSpecifier *NNS, 4056 const IdentifierInfo *Name, 4057 unsigned NumArgs, 4058 const TemplateArgument *Args, 4059 QualType Canon); 4060 4061 friend class ASTContext; // ASTContext creates these 4062 4063public: 4064 NestedNameSpecifier *getQualifier() const { return NNS; } 4065 const IdentifierInfo *getIdentifier() const { return Name; } 4066 4067 /// \brief Retrieve the template arguments. 4068 const TemplateArgument *getArgs() const { 4069 return getArgBuffer(); 4070 } 4071 4072 /// \brief Retrieve the number of template arguments. 4073 unsigned getNumArgs() const { return NumArgs; } 4074 4075 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 4076 4077 typedef const TemplateArgument * iterator; 4078 iterator begin() const { return getArgs(); } 4079 iterator end() const; // inline in TemplateBase.h 4080 4081 bool isSugared() const { return false; } 4082 QualType desugar() const { return QualType(this, 0); } 4083 4084 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) { 4085 Profile(ID, Context, getKeyword(), NNS, Name, NumArgs, getArgs()); 4086 } 4087 4088 static void Profile(llvm::FoldingSetNodeID &ID, 4089 const ASTContext &Context, 4090 ElaboratedTypeKeyword Keyword, 4091 NestedNameSpecifier *Qualifier, 4092 const IdentifierInfo *Name, 4093 unsigned NumArgs, 4094 const TemplateArgument *Args); 4095 4096 static bool classof(const Type *T) { 4097 return T->getTypeClass() == DependentTemplateSpecialization; 4098 } 4099}; 4100 4101/// \brief Represents a pack expansion of types. 4102/// 4103/// Pack expansions are part of C++0x variadic templates. A pack 4104/// expansion contains a pattern, which itself contains one or more 4105/// "unexpanded" parameter packs. When instantiated, a pack expansion 4106/// produces a series of types, each instantiated from the pattern of 4107/// the expansion, where the Ith instantiation of the pattern uses the 4108/// Ith arguments bound to each of the unexpanded parameter packs. The 4109/// pack expansion is considered to "expand" these unexpanded 4110/// parameter packs. 4111/// 4112/// \code 4113/// template<typename ...Types> struct tuple; 4114/// 4115/// template<typename ...Types> 4116/// struct tuple_of_references { 4117/// typedef tuple<Types&...> type; 4118/// }; 4119/// \endcode 4120/// 4121/// Here, the pack expansion \c Types&... is represented via a 4122/// PackExpansionType whose pattern is Types&. 4123class PackExpansionType : public Type, public llvm::FoldingSetNode { 4124 /// \brief The pattern of the pack expansion. 4125 QualType Pattern; 4126 4127 /// \brief The number of expansions that this pack expansion will 4128 /// generate when substituted (+1), or indicates that 4129 /// 4130 /// This field will only have a non-zero value when some of the parameter 4131 /// packs that occur within the pattern have been substituted but others have 4132 /// not. 4133 unsigned NumExpansions; 4134 4135 PackExpansionType(QualType Pattern, QualType Canon, 4136 Optional<unsigned> NumExpansions) 4137 : Type(PackExpansion, Canon, /*Dependent=*/Pattern->isDependentType(), 4138 /*InstantiationDependent=*/true, 4139 /*VariableModified=*/Pattern->isVariablyModifiedType(), 4140 /*ContainsUnexpandedParameterPack=*/false), 4141 Pattern(Pattern), 4142 NumExpansions(NumExpansions? *NumExpansions + 1: 0) { } 4143 4144 friend class ASTContext; // ASTContext creates these 4145 4146public: 4147 /// \brief Retrieve the pattern of this pack expansion, which is the 4148 /// type that will be repeatedly instantiated when instantiating the 4149 /// pack expansion itself. 4150 QualType getPattern() const { return Pattern; } 4151 4152 /// \brief Retrieve the number of expansions that this pack expansion will 4153 /// generate, if known. 4154 Optional<unsigned> getNumExpansions() const { 4155 if (NumExpansions) 4156 return NumExpansions - 1; 4157 4158 return None; 4159 } 4160 4161 bool isSugared() const { return false; } 4162 QualType desugar() const { return QualType(this, 0); } 4163 4164 void Profile(llvm::FoldingSetNodeID &ID) { 4165 Profile(ID, getPattern(), getNumExpansions()); 4166 } 4167 4168 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pattern, 4169 Optional<unsigned> NumExpansions) { 4170 ID.AddPointer(Pattern.getAsOpaquePtr()); 4171 ID.AddBoolean(NumExpansions.hasValue()); 4172 if (NumExpansions) 4173 ID.AddInteger(*NumExpansions); 4174 } 4175 4176 static bool classof(const Type *T) { 4177 return T->getTypeClass() == PackExpansion; 4178 } 4179}; 4180 4181/// ObjCObjectType - Represents a class type in Objective C. 4182/// Every Objective C type is a combination of a base type and a 4183/// list of protocols. 4184/// 4185/// Given the following declarations: 4186/// \code 4187/// \@class C; 4188/// \@protocol P; 4189/// \endcode 4190/// 4191/// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType 4192/// with base C and no protocols. 4193/// 4194/// 'C<P>' is an ObjCObjectType with base C and protocol list [P]. 4195/// 4196/// 'id' is a TypedefType which is sugar for an ObjCPointerType whose 4197/// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType 4198/// and no protocols. 4199/// 4200/// 'id<P>' is an ObjCPointerType whose pointee is an ObjCObjecType 4201/// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually 4202/// this should get its own sugar class to better represent the source. 4203class ObjCObjectType : public Type { 4204 // ObjCObjectType.NumProtocols - the number of protocols stored 4205 // after the ObjCObjectPointerType node. 4206 // 4207 // These protocols are those written directly on the type. If 4208 // protocol qualifiers ever become additive, the iterators will need 4209 // to get kindof complicated. 4210 // 4211 // In the canonical object type, these are sorted alphabetically 4212 // and uniqued. 4213 4214 /// Either a BuiltinType or an InterfaceType or sugar for either. 4215 QualType BaseType; 4216 4217 ObjCProtocolDecl * const *getProtocolStorage() const { 4218 return const_cast<ObjCObjectType*>(this)->getProtocolStorage(); 4219 } 4220 4221 ObjCProtocolDecl **getProtocolStorage(); 4222 4223protected: 4224 ObjCObjectType(QualType Canonical, QualType Base, 4225 ObjCProtocolDecl * const *Protocols, unsigned NumProtocols); 4226 4227 enum Nonce_ObjCInterface { Nonce_ObjCInterface }; 4228 ObjCObjectType(enum Nonce_ObjCInterface) 4229 : Type(ObjCInterface, QualType(), false, false, false, false), 4230 BaseType(QualType(this_(), 0)) { 4231 ObjCObjectTypeBits.NumProtocols = 0; 4232 } 4233 4234public: 4235 /// getBaseType - Gets the base type of this object type. This is 4236 /// always (possibly sugar for) one of: 4237 /// - the 'id' builtin type (as opposed to the 'id' type visible to the 4238 /// user, which is a typedef for an ObjCPointerType) 4239 /// - the 'Class' builtin type (same caveat) 4240 /// - an ObjCObjectType (currently always an ObjCInterfaceType) 4241 QualType getBaseType() const { return BaseType; } 4242 4243 bool isObjCId() const { 4244 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); 4245 } 4246 bool isObjCClass() const { 4247 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); 4248 } 4249 bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } 4250 bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } 4251 bool isObjCUnqualifiedIdOrClass() const { 4252 if (!qual_empty()) return false; 4253 if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) 4254 return T->getKind() == BuiltinType::ObjCId || 4255 T->getKind() == BuiltinType::ObjCClass; 4256 return false; 4257 } 4258 bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } 4259 bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } 4260 4261 /// Gets the interface declaration for this object type, if the base type 4262 /// really is an interface. 4263 ObjCInterfaceDecl *getInterface() const; 4264 4265 typedef ObjCProtocolDecl * const *qual_iterator; 4266 4267 qual_iterator qual_begin() const { return getProtocolStorage(); } 4268 qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } 4269 4270 bool qual_empty() const { return getNumProtocols() == 0; } 4271 4272 /// getNumProtocols - Return the number of qualifying protocols in this 4273 /// interface type, or 0 if there are none. 4274 unsigned getNumProtocols() const { return ObjCObjectTypeBits.NumProtocols; } 4275 4276 /// \brief Fetch a protocol by index. 4277 ObjCProtocolDecl *getProtocol(unsigned I) const { 4278 assert(I < getNumProtocols() && "Out-of-range protocol access"); 4279 return qual_begin()[I]; 4280 } 4281 4282 bool isSugared() const { return false; } 4283 QualType desugar() const { return QualType(this, 0); } 4284 4285 static bool classof(const Type *T) { 4286 return T->getTypeClass() == ObjCObject || 4287 T->getTypeClass() == ObjCInterface; 4288 } 4289}; 4290 4291/// ObjCObjectTypeImpl - A class providing a concrete implementation 4292/// of ObjCObjectType, so as to not increase the footprint of 4293/// ObjCInterfaceType. Code outside of ASTContext and the core type 4294/// system should not reference this type. 4295class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { 4296 friend class ASTContext; 4297 4298 // If anyone adds fields here, ObjCObjectType::getProtocolStorage() 4299 // will need to be modified. 4300 4301 ObjCObjectTypeImpl(QualType Canonical, QualType Base, 4302 ObjCProtocolDecl * const *Protocols, 4303 unsigned NumProtocols) 4304 : ObjCObjectType(Canonical, Base, Protocols, NumProtocols) {} 4305 4306public: 4307 void Profile(llvm::FoldingSetNodeID &ID); 4308 static void Profile(llvm::FoldingSetNodeID &ID, 4309 QualType Base, 4310 ObjCProtocolDecl *const *protocols, 4311 unsigned NumProtocols); 4312}; 4313 4314inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorage() { 4315 return reinterpret_cast<ObjCProtocolDecl**>( 4316 static_cast<ObjCObjectTypeImpl*>(this) + 1); 4317} 4318 4319/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 4320/// object oriented design. They basically correspond to C++ classes. There 4321/// are two kinds of interface types, normal interfaces like "NSString" and 4322/// qualified interfaces, which are qualified with a protocol list like 4323/// "NSString<NSCopyable, NSAmazing>". 4324/// 4325/// ObjCInterfaceType guarantees the following properties when considered 4326/// as a subtype of its superclass, ObjCObjectType: 4327/// - There are no protocol qualifiers. To reinforce this, code which 4328/// tries to invoke the protocol methods via an ObjCInterfaceType will 4329/// fail to compile. 4330/// - It is its own base type. That is, if T is an ObjCInterfaceType*, 4331/// T->getBaseType() == QualType(T, 0). 4332class ObjCInterfaceType : public ObjCObjectType { 4333 mutable ObjCInterfaceDecl *Decl; 4334 4335 ObjCInterfaceType(const ObjCInterfaceDecl *D) 4336 : ObjCObjectType(Nonce_ObjCInterface), 4337 Decl(const_cast<ObjCInterfaceDecl*>(D)) {} 4338 friend class ASTContext; // ASTContext creates these. 4339 friend class ASTReader; 4340 friend class ObjCInterfaceDecl; 4341 4342public: 4343 /// getDecl - Get the declaration of this interface. 4344 ObjCInterfaceDecl *getDecl() const { return Decl; } 4345 4346 bool isSugared() const { return false; } 4347 QualType desugar() const { return QualType(this, 0); } 4348 4349 static bool classof(const Type *T) { 4350 return T->getTypeClass() == ObjCInterface; 4351 } 4352 4353 // Nonsense to "hide" certain members of ObjCObjectType within this 4354 // class. People asking for protocols on an ObjCInterfaceType are 4355 // not going to get what they want: ObjCInterfaceTypes are 4356 // guaranteed to have no protocols. 4357 enum { 4358 qual_iterator, 4359 qual_begin, 4360 qual_end, 4361 getNumProtocols, 4362 getProtocol 4363 }; 4364}; 4365 4366inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { 4367 if (const ObjCInterfaceType *T = 4368 getBaseType()->getAs<ObjCInterfaceType>()) 4369 return T->getDecl(); 4370 return 0; 4371} 4372 4373/// ObjCObjectPointerType - Used to represent a pointer to an 4374/// Objective C object. These are constructed from pointer 4375/// declarators when the pointee type is an ObjCObjectType (or sugar 4376/// for one). In addition, the 'id' and 'Class' types are typedefs 4377/// for these, and the protocol-qualified types 'id<P>' and 'Class<P>' 4378/// are translated into these. 4379/// 4380/// Pointers to pointers to Objective C objects are still PointerTypes; 4381/// only the first level of pointer gets it own type implementation. 4382class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 4383 QualType PointeeType; 4384 4385 ObjCObjectPointerType(QualType Canonical, QualType Pointee) 4386 : Type(ObjCObjectPointer, Canonical, false, false, false, false), 4387 PointeeType(Pointee) {} 4388 friend class ASTContext; // ASTContext creates these. 4389 4390public: 4391 /// getPointeeType - Gets the type pointed to by this ObjC pointer. 4392 /// The result will always be an ObjCObjectType or sugar thereof. 4393 QualType getPointeeType() const { return PointeeType; } 4394 4395 /// getObjCObjectType - Gets the type pointed to by this ObjC 4396 /// pointer. This method always returns non-null. 4397 /// 4398 /// This method is equivalent to getPointeeType() except that 4399 /// it discards any typedefs (or other sugar) between this 4400 /// type and the "outermost" object type. So for: 4401 /// \code 4402 /// \@class A; \@protocol P; \@protocol Q; 4403 /// typedef A<P> AP; 4404 /// typedef A A1; 4405 /// typedef A1<P> A1P; 4406 /// typedef A1P<Q> A1PQ; 4407 /// \endcode 4408 /// For 'A*', getObjectType() will return 'A'. 4409 /// For 'A<P>*', getObjectType() will return 'A<P>'. 4410 /// For 'AP*', getObjectType() will return 'A<P>'. 4411 /// For 'A1*', getObjectType() will return 'A'. 4412 /// For 'A1<P>*', getObjectType() will return 'A1<P>'. 4413 /// For 'A1P*', getObjectType() will return 'A1<P>'. 4414 /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because 4415 /// adding protocols to a protocol-qualified base discards the 4416 /// old qualifiers (for now). But if it didn't, getObjectType() 4417 /// would return 'A1P<Q>' (and we'd have to make iterating over 4418 /// qualifiers more complicated). 4419 const ObjCObjectType *getObjectType() const { 4420 return PointeeType->castAs<ObjCObjectType>(); 4421 } 4422 4423 /// getInterfaceType - If this pointer points to an Objective C 4424 /// \@interface type, gets the type for that interface. Any protocol 4425 /// qualifiers on the interface are ignored. 4426 /// 4427 /// \return null if the base type for this pointer is 'id' or 'Class' 4428 const ObjCInterfaceType *getInterfaceType() const { 4429 return getObjectType()->getBaseType()->getAs<ObjCInterfaceType>(); 4430 } 4431 4432 /// getInterfaceDecl - If this pointer points to an Objective \@interface 4433 /// type, gets the declaration for that interface. 4434 /// 4435 /// \return null if the base type for this pointer is 'id' or 'Class' 4436 ObjCInterfaceDecl *getInterfaceDecl() const { 4437 return getObjectType()->getInterface(); 4438 } 4439 4440 /// isObjCIdType - True if this is equivalent to the 'id' type, i.e. if 4441 /// its object type is the primitive 'id' type with no protocols. 4442 bool isObjCIdType() const { 4443 return getObjectType()->isObjCUnqualifiedId(); 4444 } 4445 4446 /// isObjCClassType - True if this is equivalent to the 'Class' type, 4447 /// i.e. if its object tive is the primitive 'Class' type with no protocols. 4448 bool isObjCClassType() const { 4449 return getObjectType()->isObjCUnqualifiedClass(); 4450 } 4451 4452 /// isObjCQualifiedIdType - True if this is equivalent to 'id<P>' for some 4453 /// non-empty set of protocols. 4454 bool isObjCQualifiedIdType() const { 4455 return getObjectType()->isObjCQualifiedId(); 4456 } 4457 4458 /// isObjCQualifiedClassType - True if this is equivalent to 'Class<P>' for 4459 /// some non-empty set of protocols. 4460 bool isObjCQualifiedClassType() const { 4461 return getObjectType()->isObjCQualifiedClass(); 4462 } 4463 4464 /// An iterator over the qualifiers on the object type. Provided 4465 /// for convenience. This will always iterate over the full set of 4466 /// protocols on a type, not just those provided directly. 4467 typedef ObjCObjectType::qual_iterator qual_iterator; 4468 4469 qual_iterator qual_begin() const { 4470 return getObjectType()->qual_begin(); 4471 } 4472 qual_iterator qual_end() const { 4473 return getObjectType()->qual_end(); 4474 } 4475 bool qual_empty() const { return getObjectType()->qual_empty(); } 4476 4477 /// getNumProtocols - Return the number of qualifying protocols on 4478 /// the object type. 4479 unsigned getNumProtocols() const { 4480 return getObjectType()->getNumProtocols(); 4481 } 4482 4483 /// \brief Retrieve a qualifying protocol by index on the object 4484 /// type. 4485 ObjCProtocolDecl *getProtocol(unsigned I) const { 4486 return getObjectType()->getProtocol(I); 4487 } 4488 4489 bool isSugared() const { return false; } 4490 QualType desugar() const { return QualType(this, 0); } 4491 4492 void Profile(llvm::FoldingSetNodeID &ID) { 4493 Profile(ID, getPointeeType()); 4494 } 4495 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 4496 ID.AddPointer(T.getAsOpaquePtr()); 4497 } 4498 static bool classof(const Type *T) { 4499 return T->getTypeClass() == ObjCObjectPointer; 4500 } 4501}; 4502 4503class AtomicType : public Type, public llvm::FoldingSetNode { 4504 QualType ValueType; 4505 4506 AtomicType(QualType ValTy, QualType Canonical) 4507 : Type(Atomic, Canonical, ValTy->isDependentType(), 4508 ValTy->isInstantiationDependentType(), 4509 ValTy->isVariablyModifiedType(), 4510 ValTy->containsUnexpandedParameterPack()), 4511 ValueType(ValTy) {} 4512 friend class ASTContext; // ASTContext creates these. 4513 4514 public: 4515 /// getValueType - Gets the type contained by this atomic type, i.e. 4516 /// the type returned by performing an atomic load of this atomic type. 4517 QualType getValueType() const { return ValueType; } 4518 4519 bool isSugared() const { return false; } 4520 QualType desugar() const { return QualType(this, 0); } 4521 4522 void Profile(llvm::FoldingSetNodeID &ID) { 4523 Profile(ID, getValueType()); 4524 } 4525 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 4526 ID.AddPointer(T.getAsOpaquePtr()); 4527 } 4528 static bool classof(const Type *T) { 4529 return T->getTypeClass() == Atomic; 4530 } 4531}; 4532 4533/// A qualifier set is used to build a set of qualifiers. 4534class QualifierCollector : public Qualifiers { 4535public: 4536 QualifierCollector(Qualifiers Qs = Qualifiers()) : Qualifiers(Qs) {} 4537 4538 /// Collect any qualifiers on the given type and return an 4539 /// unqualified type. The qualifiers are assumed to be consistent 4540 /// with those already in the type. 4541 const Type *strip(QualType type) { 4542 addFastQualifiers(type.getLocalFastQualifiers()); 4543 if (!type.hasLocalNonFastQualifiers()) 4544 return type.getTypePtrUnsafe(); 4545 4546 const ExtQuals *extQuals = type.getExtQualsUnsafe(); 4547 addConsistentQualifiers(extQuals->getQualifiers()); 4548 return extQuals->getBaseType(); 4549 } 4550 4551 /// Apply the collected qualifiers to the given type. 4552 QualType apply(const ASTContext &Context, QualType QT) const; 4553 4554 /// Apply the collected qualifiers to the given type. 4555 QualType apply(const ASTContext &Context, const Type* T) const; 4556}; 4557 4558 4559// Inline function definitions. 4560 4561inline SplitQualType SplitQualType::getSingleStepDesugaredType() const { 4562 SplitQualType desugar = 4563 Ty->getLocallyUnqualifiedSingleStepDesugaredType().split(); 4564 desugar.Quals.addConsistentQualifiers(Quals); 4565 return desugar; 4566} 4567 4568inline const Type *QualType::getTypePtr() const { 4569 return getCommonPtr()->BaseType; 4570} 4571 4572inline const Type *QualType::getTypePtrOrNull() const { 4573 return (isNull() ? 0 : getCommonPtr()->BaseType); 4574} 4575 4576inline SplitQualType QualType::split() const { 4577 if (!hasLocalNonFastQualifiers()) 4578 return SplitQualType(getTypePtrUnsafe(), 4579 Qualifiers::fromFastMask(getLocalFastQualifiers())); 4580 4581 const ExtQuals *eq = getExtQualsUnsafe(); 4582 Qualifiers qs = eq->getQualifiers(); 4583 qs.addFastQualifiers(getLocalFastQualifiers()); 4584 return SplitQualType(eq->getBaseType(), qs); 4585} 4586 4587inline Qualifiers QualType::getLocalQualifiers() const { 4588 Qualifiers Quals; 4589 if (hasLocalNonFastQualifiers()) 4590 Quals = getExtQualsUnsafe()->getQualifiers(); 4591 Quals.addFastQualifiers(getLocalFastQualifiers()); 4592 return Quals; 4593} 4594 4595inline Qualifiers QualType::getQualifiers() const { 4596 Qualifiers quals = getCommonPtr()->CanonicalType.getLocalQualifiers(); 4597 quals.addFastQualifiers(getLocalFastQualifiers()); 4598 return quals; 4599} 4600 4601inline unsigned QualType::getCVRQualifiers() const { 4602 unsigned cvr = getCommonPtr()->CanonicalType.getLocalCVRQualifiers(); 4603 cvr |= getLocalCVRQualifiers(); 4604 return cvr; 4605} 4606 4607inline QualType QualType::getCanonicalType() const { 4608 QualType canon = getCommonPtr()->CanonicalType; 4609 return canon.withFastQualifiers(getLocalFastQualifiers()); 4610} 4611 4612inline bool QualType::isCanonical() const { 4613 return getTypePtr()->isCanonicalUnqualified(); 4614} 4615 4616inline bool QualType::isCanonicalAsParam() const { 4617 if (!isCanonical()) return false; 4618 if (hasLocalQualifiers()) return false; 4619 4620 const Type *T = getTypePtr(); 4621 if (T->isVariablyModifiedType() && T->hasSizedVLAType()) 4622 return false; 4623 4624 return !isa<FunctionType>(T) && !isa<ArrayType>(T); 4625} 4626 4627inline bool QualType::isConstQualified() const { 4628 return isLocalConstQualified() || 4629 getCommonPtr()->CanonicalType.isLocalConstQualified(); 4630} 4631 4632inline bool QualType::isRestrictQualified() const { 4633 return isLocalRestrictQualified() || 4634 getCommonPtr()->CanonicalType.isLocalRestrictQualified(); 4635} 4636 4637 4638inline bool QualType::isVolatileQualified() const { 4639 return isLocalVolatileQualified() || 4640 getCommonPtr()->CanonicalType.isLocalVolatileQualified(); 4641} 4642 4643inline bool QualType::hasQualifiers() const { 4644 return hasLocalQualifiers() || 4645 getCommonPtr()->CanonicalType.hasLocalQualifiers(); 4646} 4647 4648inline QualType QualType::getUnqualifiedType() const { 4649 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4650 return QualType(getTypePtr(), 0); 4651 4652 return QualType(getSplitUnqualifiedTypeImpl(*this).Ty, 0); 4653} 4654 4655inline QualType QualType::getUnqualifiedObjCPointerType() const { 4656 return getTypePtr()->isObjCObjectPointerType() ? 4657 getUnqualifiedType() : *this; 4658} 4659 4660inline SplitQualType QualType::getSplitUnqualifiedType() const { 4661 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4662 return split(); 4663 4664 return getSplitUnqualifiedTypeImpl(*this); 4665} 4666 4667inline void QualType::removeLocalConst() { 4668 removeLocalFastQualifiers(Qualifiers::Const); 4669} 4670 4671inline void QualType::removeLocalRestrict() { 4672 removeLocalFastQualifiers(Qualifiers::Restrict); 4673} 4674 4675inline void QualType::removeLocalVolatile() { 4676 removeLocalFastQualifiers(Qualifiers::Volatile); 4677} 4678 4679inline void QualType::removeLocalCVRQualifiers(unsigned Mask) { 4680 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 4681 assert((int)Qualifiers::CVRMask == (int)Qualifiers::FastMask); 4682 4683 // Fast path: we don't need to touch the slow qualifiers. 4684 removeLocalFastQualifiers(Mask); 4685} 4686 4687/// getAddressSpace - Return the address space of this type. 4688inline unsigned QualType::getAddressSpace() const { 4689 return getQualifiers().getAddressSpace(); 4690} 4691 4692/// getObjCGCAttr - Return the gc attribute of this type. 4693inline Qualifiers::GC QualType::getObjCGCAttr() const { 4694 return getQualifiers().getObjCGCAttr(); 4695} 4696 4697inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { 4698 if (const PointerType *PT = t.getAs<PointerType>()) { 4699 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 4700 return FT->getExtInfo(); 4701 } else if (const FunctionType *FT = t.getAs<FunctionType>()) 4702 return FT->getExtInfo(); 4703 4704 return FunctionType::ExtInfo(); 4705} 4706 4707inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { 4708 return getFunctionExtInfo(*t); 4709} 4710 4711/// isMoreQualifiedThan - Determine whether this type is more 4712/// qualified than the Other type. For example, "const volatile int" 4713/// is more qualified than "const int", "volatile int", and 4714/// "int". However, it is not more qualified than "const volatile 4715/// int". 4716inline bool QualType::isMoreQualifiedThan(QualType other) const { 4717 Qualifiers myQuals = getQualifiers(); 4718 Qualifiers otherQuals = other.getQualifiers(); 4719 return (myQuals != otherQuals && myQuals.compatiblyIncludes(otherQuals)); 4720} 4721 4722/// isAtLeastAsQualifiedAs - Determine whether this type is at last 4723/// as qualified as the Other type. For example, "const volatile 4724/// int" is at least as qualified as "const int", "volatile int", 4725/// "int", and "const volatile int". 4726inline bool QualType::isAtLeastAsQualifiedAs(QualType other) const { 4727 return getQualifiers().compatiblyIncludes(other.getQualifiers()); 4728} 4729 4730/// getNonReferenceType - If Type is a reference type (e.g., const 4731/// int&), returns the type that the reference refers to ("const 4732/// int"). Otherwise, returns the type itself. This routine is used 4733/// throughout Sema to implement C++ 5p6: 4734/// 4735/// If an expression initially has the type "reference to T" (8.3.2, 4736/// 8.5.3), the type is adjusted to "T" prior to any further 4737/// analysis, the expression designates the object or function 4738/// denoted by the reference, and the expression is an lvalue. 4739inline QualType QualType::getNonReferenceType() const { 4740 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 4741 return RefType->getPointeeType(); 4742 else 4743 return *this; 4744} 4745 4746inline bool QualType::isCForbiddenLValueType() const { 4747 return ((getTypePtr()->isVoidType() && !hasQualifiers()) || 4748 getTypePtr()->isFunctionType()); 4749} 4750 4751/// \brief Tests whether the type is categorized as a fundamental type. 4752/// 4753/// \returns True for types specified in C++0x [basic.fundamental]. 4754inline bool Type::isFundamentalType() const { 4755 return isVoidType() || 4756 // FIXME: It's really annoying that we don't have an 4757 // 'isArithmeticType()' which agrees with the standard definition. 4758 (isArithmeticType() && !isEnumeralType()); 4759} 4760 4761/// \brief Tests whether the type is categorized as a compound type. 4762/// 4763/// \returns True for types specified in C++0x [basic.compound]. 4764inline bool Type::isCompoundType() const { 4765 // C++0x [basic.compound]p1: 4766 // Compound types can be constructed in the following ways: 4767 // -- arrays of objects of a given type [...]; 4768 return isArrayType() || 4769 // -- functions, which have parameters of given types [...]; 4770 isFunctionType() || 4771 // -- pointers to void or objects or functions [...]; 4772 isPointerType() || 4773 // -- references to objects or functions of a given type. [...] 4774 isReferenceType() || 4775 // -- classes containing a sequence of objects of various types, [...]; 4776 isRecordType() || 4777 // -- unions, which are classes capable of containing objects of different 4778 // types at different times; 4779 isUnionType() || 4780 // -- enumerations, which comprise a set of named constant values. [...]; 4781 isEnumeralType() || 4782 // -- pointers to non-static class members, [...]. 4783 isMemberPointerType(); 4784} 4785 4786inline bool Type::isFunctionType() const { 4787 return isa<FunctionType>(CanonicalType); 4788} 4789inline bool Type::isPointerType() const { 4790 return isa<PointerType>(CanonicalType); 4791} 4792inline bool Type::isAnyPointerType() const { 4793 return isPointerType() || isObjCObjectPointerType(); 4794} 4795inline bool Type::isBlockPointerType() const { 4796 return isa<BlockPointerType>(CanonicalType); 4797} 4798inline bool Type::isReferenceType() const { 4799 return isa<ReferenceType>(CanonicalType); 4800} 4801inline bool Type::isLValueReferenceType() const { 4802 return isa<LValueReferenceType>(CanonicalType); 4803} 4804inline bool Type::isRValueReferenceType() const { 4805 return isa<RValueReferenceType>(CanonicalType); 4806} 4807inline bool Type::isFunctionPointerType() const { 4808 if (const PointerType *T = getAs<PointerType>()) 4809 return T->getPointeeType()->isFunctionType(); 4810 else 4811 return false; 4812} 4813inline bool Type::isMemberPointerType() const { 4814 return isa<MemberPointerType>(CanonicalType); 4815} 4816inline bool Type::isMemberFunctionPointerType() const { 4817 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4818 return T->isMemberFunctionPointer(); 4819 else 4820 return false; 4821} 4822inline bool Type::isMemberDataPointerType() const { 4823 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4824 return T->isMemberDataPointer(); 4825 else 4826 return false; 4827} 4828inline bool Type::isArrayType() const { 4829 return isa<ArrayType>(CanonicalType); 4830} 4831inline bool Type::isConstantArrayType() const { 4832 return isa<ConstantArrayType>(CanonicalType); 4833} 4834inline bool Type::isIncompleteArrayType() const { 4835 return isa<IncompleteArrayType>(CanonicalType); 4836} 4837inline bool Type::isVariableArrayType() const { 4838 return isa<VariableArrayType>(CanonicalType); 4839} 4840inline bool Type::isDependentSizedArrayType() const { 4841 return isa<DependentSizedArrayType>(CanonicalType); 4842} 4843inline bool Type::isBuiltinType() const { 4844 return isa<BuiltinType>(CanonicalType); 4845} 4846inline bool Type::isRecordType() const { 4847 return isa<RecordType>(CanonicalType); 4848} 4849inline bool Type::isEnumeralType() const { 4850 return isa<EnumType>(CanonicalType); 4851} 4852inline bool Type::isAnyComplexType() const { 4853 return isa<ComplexType>(CanonicalType); 4854} 4855inline bool Type::isVectorType() const { 4856 return isa<VectorType>(CanonicalType); 4857} 4858inline bool Type::isExtVectorType() const { 4859 return isa<ExtVectorType>(CanonicalType); 4860} 4861inline bool Type::isObjCObjectPointerType() const { 4862 return isa<ObjCObjectPointerType>(CanonicalType); 4863} 4864inline bool Type::isObjCObjectType() const { 4865 return isa<ObjCObjectType>(CanonicalType); 4866} 4867inline bool Type::isObjCObjectOrInterfaceType() const { 4868 return isa<ObjCInterfaceType>(CanonicalType) || 4869 isa<ObjCObjectType>(CanonicalType); 4870} 4871inline bool Type::isAtomicType() const { 4872 return isa<AtomicType>(CanonicalType); 4873} 4874 4875inline bool Type::isObjCQualifiedIdType() const { 4876 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4877 return OPT->isObjCQualifiedIdType(); 4878 return false; 4879} 4880inline bool Type::isObjCQualifiedClassType() const { 4881 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4882 return OPT->isObjCQualifiedClassType(); 4883 return false; 4884} 4885inline bool Type::isObjCIdType() const { 4886 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4887 return OPT->isObjCIdType(); 4888 return false; 4889} 4890inline bool Type::isObjCClassType() const { 4891 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4892 return OPT->isObjCClassType(); 4893 return false; 4894} 4895inline bool Type::isObjCSelType() const { 4896 if (const PointerType *OPT = getAs<PointerType>()) 4897 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 4898 return false; 4899} 4900inline bool Type::isObjCBuiltinType() const { 4901 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 4902} 4903 4904inline bool Type::isImage1dT() const { 4905 return isSpecificBuiltinType(BuiltinType::OCLImage1d); 4906} 4907 4908inline bool Type::isImage1dArrayT() const { 4909 return isSpecificBuiltinType(BuiltinType::OCLImage1dArray); 4910} 4911 4912inline bool Type::isImage1dBufferT() const { 4913 return isSpecificBuiltinType(BuiltinType::OCLImage1dBuffer); 4914} 4915 4916inline bool Type::isImage2dT() const { 4917 return isSpecificBuiltinType(BuiltinType::OCLImage2d); 4918} 4919 4920inline bool Type::isImage2dArrayT() const { 4921 return isSpecificBuiltinType(BuiltinType::OCLImage2dArray); 4922} 4923 4924inline bool Type::isImage3dT() const { 4925 return isSpecificBuiltinType(BuiltinType::OCLImage3d); 4926} 4927 4928inline bool Type::isSamplerT() const { 4929 return isSpecificBuiltinType(BuiltinType::OCLSampler); 4930} 4931 4932inline bool Type::isEventT() const { 4933 return isSpecificBuiltinType(BuiltinType::OCLEvent); 4934} 4935 4936inline bool Type::isImageType() const { 4937 return isImage3dT() || 4938 isImage2dT() || isImage2dArrayT() || 4939 isImage1dT() || isImage1dArrayT() || isImage1dBufferT(); 4940} 4941 4942inline bool Type::isOpenCLSpecificType() const { 4943 return isSamplerT() || isEventT() || isImageType(); 4944} 4945 4946inline bool Type::isTemplateTypeParmType() const { 4947 return isa<TemplateTypeParmType>(CanonicalType); 4948} 4949 4950inline bool Type::isSpecificBuiltinType(unsigned K) const { 4951 if (const BuiltinType *BT = getAs<BuiltinType>()) 4952 if (BT->getKind() == (BuiltinType::Kind) K) 4953 return true; 4954 return false; 4955} 4956 4957inline bool Type::isPlaceholderType() const { 4958 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4959 return BT->isPlaceholderType(); 4960 return false; 4961} 4962 4963inline const BuiltinType *Type::getAsPlaceholderType() const { 4964 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4965 if (BT->isPlaceholderType()) 4966 return BT; 4967 return 0; 4968} 4969 4970inline bool Type::isSpecificPlaceholderType(unsigned K) const { 4971 assert(BuiltinType::isPlaceholderTypeKind((BuiltinType::Kind) K)); 4972 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4973 return (BT->getKind() == (BuiltinType::Kind) K); 4974 return false; 4975} 4976 4977inline bool Type::isNonOverloadPlaceholderType() const { 4978 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4979 return BT->isNonOverloadPlaceholderType(); 4980 return false; 4981} 4982 4983inline bool Type::isVoidType() const { 4984 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 4985 return BT->getKind() == BuiltinType::Void; 4986 return false; 4987} 4988 4989inline bool Type::isHalfType() const { 4990 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 4991 return BT->getKind() == BuiltinType::Half; 4992 // FIXME: Should we allow complex __fp16? Probably not. 4993 return false; 4994} 4995 4996inline bool Type::isNullPtrType() const { 4997 if (const BuiltinType *BT = getAs<BuiltinType>()) 4998 return BT->getKind() == BuiltinType::NullPtr; 4999 return false; 5000} 5001 5002extern bool IsEnumDeclComplete(EnumDecl *); 5003extern bool IsEnumDeclScoped(EnumDecl *); 5004 5005inline bool Type::isIntegerType() const { 5006 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 5007 return BT->getKind() >= BuiltinType::Bool && 5008 BT->getKind() <= BuiltinType::Int128; 5009 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) { 5010 // Incomplete enum types are not treated as integer types. 5011 // FIXME: In C++, enum types are never integer types. 5012 return IsEnumDeclComplete(ET->getDecl()) && 5013 !IsEnumDeclScoped(ET->getDecl()); 5014 } 5015 return false; 5016} 5017 5018inline bool Type::isScalarType() const { 5019 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 5020 return BT->getKind() > BuiltinType::Void && 5021 BT->getKind() <= BuiltinType::NullPtr; 5022 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) 5023 // Enums are scalar types, but only if they are defined. Incomplete enums 5024 // are not treated as scalar types. 5025 return IsEnumDeclComplete(ET->getDecl()); 5026 return isa<PointerType>(CanonicalType) || 5027 isa<BlockPointerType>(CanonicalType) || 5028 isa<MemberPointerType>(CanonicalType) || 5029 isa<ComplexType>(CanonicalType) || 5030 isa<ObjCObjectPointerType>(CanonicalType); 5031} 5032 5033inline bool Type::isIntegralOrEnumerationType() const { 5034 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 5035 return BT->getKind() >= BuiltinType::Bool && 5036 BT->getKind() <= BuiltinType::Int128; 5037 5038 // Check for a complete enum type; incomplete enum types are not properly an 5039 // enumeration type in the sense required here. 5040 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) 5041 return IsEnumDeclComplete(ET->getDecl()); 5042 5043 return false; 5044} 5045 5046inline bool Type::isBooleanType() const { 5047 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 5048 return BT->getKind() == BuiltinType::Bool; 5049 return false; 5050} 5051 5052inline bool Type::isUndeducedType() const { 5053 const AutoType *AT = getContainedAutoType(); 5054 return AT && !AT->isDeduced(); 5055} 5056 5057/// \brief Determines whether this is a type for which one can define 5058/// an overloaded operator. 5059inline bool Type::isOverloadableType() const { 5060 return isDependentType() || isRecordType() || isEnumeralType(); 5061} 5062 5063/// \brief Determines whether this type can decay to a pointer type. 5064inline bool Type::canDecayToPointerType() const { 5065 return isFunctionType() || isArrayType(); 5066} 5067 5068inline bool Type::hasPointerRepresentation() const { 5069 return (isPointerType() || isReferenceType() || isBlockPointerType() || 5070 isObjCObjectPointerType() || isNullPtrType()); 5071} 5072 5073inline bool Type::hasObjCPointerRepresentation() const { 5074 return isObjCObjectPointerType(); 5075} 5076 5077inline const Type *Type::getBaseElementTypeUnsafe() const { 5078 const Type *type = this; 5079 while (const ArrayType *arrayType = type->getAsArrayTypeUnsafe()) 5080 type = arrayType->getElementType().getTypePtr(); 5081 return type; 5082} 5083 5084/// Insertion operator for diagnostics. This allows sending QualType's into a 5085/// diagnostic with <<. 5086inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 5087 QualType T) { 5088 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 5089 DiagnosticsEngine::ak_qualtype); 5090 return DB; 5091} 5092 5093/// Insertion operator for partial diagnostics. This allows sending QualType's 5094/// into a diagnostic with <<. 5095inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, 5096 QualType T) { 5097 PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 5098 DiagnosticsEngine::ak_qualtype); 5099 return PD; 5100} 5101 5102// Helper class template that is used by Type::getAs to ensure that one does 5103// not try to look through a qualified type to get to an array type. 5104template<typename T, 5105 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 5106 llvm::is_base_of<ArrayType, T>::value)> 5107struct ArrayType_cannot_be_used_with_getAs { }; 5108 5109template<typename T> 5110struct ArrayType_cannot_be_used_with_getAs<T, true>; 5111 5112// Member-template getAs<specific type>'. 5113template <typename T> const T *Type::getAs() const { 5114 ArrayType_cannot_be_used_with_getAs<T> at; 5115 (void)at; 5116 5117 // If this is directly a T type, return it. 5118 if (const T *Ty = dyn_cast<T>(this)) 5119 return Ty; 5120 5121 // If the canonical form of this type isn't the right kind, reject it. 5122 if (!isa<T>(CanonicalType)) 5123 return 0; 5124 5125 // If this is a typedef for the type, strip the typedef off without 5126 // losing all typedef information. 5127 return cast<T>(getUnqualifiedDesugaredType()); 5128} 5129 5130inline const ArrayType *Type::getAsArrayTypeUnsafe() const { 5131 // If this is directly an array type, return it. 5132 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) 5133 return arr; 5134 5135 // If the canonical form of this type isn't the right kind, reject it. 5136 if (!isa<ArrayType>(CanonicalType)) 5137 return 0; 5138 5139 // If this is a typedef for the type, strip the typedef off without 5140 // losing all typedef information. 5141 return cast<ArrayType>(getUnqualifiedDesugaredType()); 5142} 5143 5144template <typename T> const T *Type::castAs() const { 5145 ArrayType_cannot_be_used_with_getAs<T> at; 5146 (void) at; 5147 5148 assert(isa<T>(CanonicalType)); 5149 if (const T *ty = dyn_cast<T>(this)) return ty; 5150 return cast<T>(getUnqualifiedDesugaredType()); 5151} 5152 5153inline const ArrayType *Type::castAsArrayTypeUnsafe() const { 5154 assert(isa<ArrayType>(CanonicalType)); 5155 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) return arr; 5156 return cast<ArrayType>(getUnqualifiedDesugaredType()); 5157} 5158 5159} // end namespace clang 5160 5161#endif 5162