Type.h revision f127eb8aeb3ce861f3dbc1adbb3362bfd98461e1
1//===--- Type.h - C Language Family Type Representation ---------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Type interface and subclasses. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_CLANG_AST_TYPE_H 15#define LLVM_CLANG_AST_TYPE_H 16 17#include "clang/AST/NestedNameSpecifier.h" 18#include "clang/AST/TemplateName.h" 19#include "clang/Basic/Diagnostic.h" 20#include "clang/Basic/ExceptionSpecificationType.h" 21#include "clang/Basic/IdentifierTable.h" 22#include "clang/Basic/LLVM.h" 23#include "clang/Basic/Linkage.h" 24#include "clang/Basic/PartialDiagnostic.h" 25#include "clang/Basic/Specifiers.h" 26#include "clang/Basic/Visibility.h" 27#include "llvm/ADT/APSInt.h" 28#include "llvm/ADT/FoldingSet.h" 29#include "llvm/ADT/Optional.h" 30#include "llvm/ADT/PointerIntPair.h" 31#include "llvm/ADT/PointerUnion.h" 32#include "llvm/ADT/Twine.h" 33#include "llvm/Support/ErrorHandling.h" 34#include "llvm/Support/type_traits.h" 35 36namespace clang { 37 enum { 38 TypeAlignmentInBits = 4, 39 TypeAlignment = 1 << TypeAlignmentInBits 40 }; 41 class Type; 42 class ExtQuals; 43 class QualType; 44} 45 46namespace llvm { 47 template <typename T> 48 class PointerLikeTypeTraits; 49 template<> 50 class PointerLikeTypeTraits< ::clang::Type*> { 51 public: 52 static inline void *getAsVoidPointer(::clang::Type *P) { return P; } 53 static inline ::clang::Type *getFromVoidPointer(void *P) { 54 return static_cast< ::clang::Type*>(P); 55 } 56 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 57 }; 58 template<> 59 class PointerLikeTypeTraits< ::clang::ExtQuals*> { 60 public: 61 static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; } 62 static inline ::clang::ExtQuals *getFromVoidPointer(void *P) { 63 return static_cast< ::clang::ExtQuals*>(P); 64 } 65 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 66 }; 67 68 template <> 69 struct isPodLike<clang::QualType> { static const bool value = true; }; 70} 71 72namespace clang { 73 class ASTContext; 74 class TypedefNameDecl; 75 class TemplateDecl; 76 class TemplateTypeParmDecl; 77 class NonTypeTemplateParmDecl; 78 class TemplateTemplateParmDecl; 79 class TagDecl; 80 class RecordDecl; 81 class CXXRecordDecl; 82 class EnumDecl; 83 class FieldDecl; 84 class FunctionDecl; 85 class ObjCInterfaceDecl; 86 class ObjCProtocolDecl; 87 class ObjCMethodDecl; 88 class UnresolvedUsingTypenameDecl; 89 class Expr; 90 class Stmt; 91 class SourceLocation; 92 class StmtIteratorBase; 93 class TemplateArgument; 94 class TemplateArgumentLoc; 95 class TemplateArgumentListInfo; 96 class ElaboratedType; 97 class ExtQuals; 98 class ExtQualsTypeCommonBase; 99 struct PrintingPolicy; 100 101 template <typename> class CanQual; 102 typedef CanQual<Type> CanQualType; 103 104 // Provide forward declarations for all of the *Type classes 105#define TYPE(Class, Base) class Class##Type; 106#include "clang/AST/TypeNodes.def" 107 108/// Qualifiers - The collection of all-type qualifiers we support. 109/// Clang supports five independent qualifiers: 110/// * C99: const, volatile, and restrict 111/// * Embedded C (TR18037): address spaces 112/// * Objective C: the GC attributes (none, weak, or strong) 113class Qualifiers { 114public: 115 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 116 Const = 0x1, 117 Restrict = 0x2, 118 Volatile = 0x4, 119 CVRMask = Const | Volatile | Restrict 120 }; 121 122 enum GC { 123 GCNone = 0, 124 Weak, 125 Strong 126 }; 127 128 enum ObjCLifetime { 129 /// There is no lifetime qualification on this type. 130 OCL_None, 131 132 /// This object can be modified without requiring retains or 133 /// releases. 134 OCL_ExplicitNone, 135 136 /// Assigning into this object requires the old value to be 137 /// released and the new value to be retained. The timing of the 138 /// release of the old value is inexact: it may be moved to 139 /// immediately after the last known point where the value is 140 /// live. 141 OCL_Strong, 142 143 /// Reading or writing from this object requires a barrier call. 144 OCL_Weak, 145 146 /// Assigning into this object requires a lifetime extension. 147 OCL_Autoreleasing 148 }; 149 150 enum { 151 /// The maximum supported address space number. 152 /// 24 bits should be enough for anyone. 153 MaxAddressSpace = 0xffffffu, 154 155 /// The width of the "fast" qualifier mask. 156 FastWidth = 3, 157 158 /// The fast qualifier mask. 159 FastMask = (1 << FastWidth) - 1 160 }; 161 162 Qualifiers() : Mask(0) {} 163 164 /// \brief Returns the common set of qualifiers while removing them from 165 /// the given sets. 166 static Qualifiers removeCommonQualifiers(Qualifiers &L, Qualifiers &R) { 167 // If both are only CVR-qualified, bit operations are sufficient. 168 if (!(L.Mask & ~CVRMask) && !(R.Mask & ~CVRMask)) { 169 Qualifiers Q; 170 Q.Mask = L.Mask & R.Mask; 171 L.Mask &= ~Q.Mask; 172 R.Mask &= ~Q.Mask; 173 return Q; 174 } 175 176 Qualifiers Q; 177 unsigned CommonCRV = L.getCVRQualifiers() & R.getCVRQualifiers(); 178 Q.addCVRQualifiers(CommonCRV); 179 L.removeCVRQualifiers(CommonCRV); 180 R.removeCVRQualifiers(CommonCRV); 181 182 if (L.getObjCGCAttr() == R.getObjCGCAttr()) { 183 Q.setObjCGCAttr(L.getObjCGCAttr()); 184 L.removeObjCGCAttr(); 185 R.removeObjCGCAttr(); 186 } 187 188 if (L.getObjCLifetime() == R.getObjCLifetime()) { 189 Q.setObjCLifetime(L.getObjCLifetime()); 190 L.removeObjCLifetime(); 191 R.removeObjCLifetime(); 192 } 193 194 if (L.getAddressSpace() == R.getAddressSpace()) { 195 Q.setAddressSpace(L.getAddressSpace()); 196 L.removeAddressSpace(); 197 R.removeAddressSpace(); 198 } 199 return Q; 200 } 201 202 static Qualifiers fromFastMask(unsigned Mask) { 203 Qualifiers Qs; 204 Qs.addFastQualifiers(Mask); 205 return Qs; 206 } 207 208 static Qualifiers fromCVRMask(unsigned CVR) { 209 Qualifiers Qs; 210 Qs.addCVRQualifiers(CVR); 211 return Qs; 212 } 213 214 // Deserialize qualifiers from an opaque representation. 215 static Qualifiers fromOpaqueValue(unsigned opaque) { 216 Qualifiers Qs; 217 Qs.Mask = opaque; 218 return Qs; 219 } 220 221 // Serialize these qualifiers into an opaque representation. 222 unsigned getAsOpaqueValue() const { 223 return Mask; 224 } 225 226 bool hasConst() const { return Mask & Const; } 227 void setConst(bool flag) { 228 Mask = (Mask & ~Const) | (flag ? Const : 0); 229 } 230 void removeConst() { Mask &= ~Const; } 231 void addConst() { Mask |= Const; } 232 233 bool hasVolatile() const { return Mask & Volatile; } 234 void setVolatile(bool flag) { 235 Mask = (Mask & ~Volatile) | (flag ? Volatile : 0); 236 } 237 void removeVolatile() { Mask &= ~Volatile; } 238 void addVolatile() { Mask |= Volatile; } 239 240 bool hasRestrict() const { return Mask & Restrict; } 241 void setRestrict(bool flag) { 242 Mask = (Mask & ~Restrict) | (flag ? Restrict : 0); 243 } 244 void removeRestrict() { Mask &= ~Restrict; } 245 void addRestrict() { Mask |= Restrict; } 246 247 bool hasCVRQualifiers() const { return getCVRQualifiers(); } 248 unsigned getCVRQualifiers() const { return Mask & CVRMask; } 249 void setCVRQualifiers(unsigned mask) { 250 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 251 Mask = (Mask & ~CVRMask) | mask; 252 } 253 void removeCVRQualifiers(unsigned mask) { 254 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 255 Mask &= ~mask; 256 } 257 void removeCVRQualifiers() { 258 removeCVRQualifiers(CVRMask); 259 } 260 void addCVRQualifiers(unsigned mask) { 261 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 262 Mask |= mask; 263 } 264 265 bool hasObjCGCAttr() const { return Mask & GCAttrMask; } 266 GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); } 267 void setObjCGCAttr(GC type) { 268 Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift); 269 } 270 void removeObjCGCAttr() { setObjCGCAttr(GCNone); } 271 void addObjCGCAttr(GC type) { 272 assert(type); 273 setObjCGCAttr(type); 274 } 275 Qualifiers withoutObjCGCAttr() const { 276 Qualifiers qs = *this; 277 qs.removeObjCGCAttr(); 278 return qs; 279 } 280 Qualifiers withoutObjCLifetime() const { 281 Qualifiers qs = *this; 282 qs.removeObjCLifetime(); 283 return qs; 284 } 285 286 bool hasObjCLifetime() const { return Mask & LifetimeMask; } 287 ObjCLifetime getObjCLifetime() const { 288 return ObjCLifetime((Mask & LifetimeMask) >> LifetimeShift); 289 } 290 void setObjCLifetime(ObjCLifetime type) { 291 Mask = (Mask & ~LifetimeMask) | (type << LifetimeShift); 292 } 293 void removeObjCLifetime() { setObjCLifetime(OCL_None); } 294 void addObjCLifetime(ObjCLifetime type) { 295 assert(type); 296 assert(!hasObjCLifetime()); 297 Mask |= (type << LifetimeShift); 298 } 299 300 /// True if the lifetime is neither None or ExplicitNone. 301 bool hasNonTrivialObjCLifetime() const { 302 ObjCLifetime lifetime = getObjCLifetime(); 303 return (lifetime > OCL_ExplicitNone); 304 } 305 306 /// True if the lifetime is either strong or weak. 307 bool hasStrongOrWeakObjCLifetime() const { 308 ObjCLifetime lifetime = getObjCLifetime(); 309 return (lifetime == OCL_Strong || lifetime == OCL_Weak); 310 } 311 312 bool hasAddressSpace() const { return Mask & AddressSpaceMask; } 313 unsigned getAddressSpace() const { return Mask >> AddressSpaceShift; } 314 void setAddressSpace(unsigned space) { 315 assert(space <= MaxAddressSpace); 316 Mask = (Mask & ~AddressSpaceMask) 317 | (((uint32_t) space) << AddressSpaceShift); 318 } 319 void removeAddressSpace() { setAddressSpace(0); } 320 void addAddressSpace(unsigned space) { 321 assert(space); 322 setAddressSpace(space); 323 } 324 325 // Fast qualifiers are those that can be allocated directly 326 // on a QualType object. 327 bool hasFastQualifiers() const { return getFastQualifiers(); } 328 unsigned getFastQualifiers() const { return Mask & FastMask; } 329 void setFastQualifiers(unsigned mask) { 330 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 331 Mask = (Mask & ~FastMask) | mask; 332 } 333 void removeFastQualifiers(unsigned mask) { 334 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 335 Mask &= ~mask; 336 } 337 void removeFastQualifiers() { 338 removeFastQualifiers(FastMask); 339 } 340 void addFastQualifiers(unsigned mask) { 341 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 342 Mask |= mask; 343 } 344 345 /// hasNonFastQualifiers - Return true if the set contains any 346 /// qualifiers which require an ExtQuals node to be allocated. 347 bool hasNonFastQualifiers() const { return Mask & ~FastMask; } 348 Qualifiers getNonFastQualifiers() const { 349 Qualifiers Quals = *this; 350 Quals.setFastQualifiers(0); 351 return Quals; 352 } 353 354 /// hasQualifiers - Return true if the set contains any qualifiers. 355 bool hasQualifiers() const { return Mask; } 356 bool empty() const { return !Mask; } 357 358 /// \brief Add the qualifiers from the given set to this set. 359 void addQualifiers(Qualifiers Q) { 360 // If the other set doesn't have any non-boolean qualifiers, just 361 // bit-or it in. 362 if (!(Q.Mask & ~CVRMask)) 363 Mask |= Q.Mask; 364 else { 365 Mask |= (Q.Mask & CVRMask); 366 if (Q.hasAddressSpace()) 367 addAddressSpace(Q.getAddressSpace()); 368 if (Q.hasObjCGCAttr()) 369 addObjCGCAttr(Q.getObjCGCAttr()); 370 if (Q.hasObjCLifetime()) 371 addObjCLifetime(Q.getObjCLifetime()); 372 } 373 } 374 375 /// \brief Remove the qualifiers from the given set from this set. 376 void removeQualifiers(Qualifiers Q) { 377 // If the other set doesn't have any non-boolean qualifiers, just 378 // bit-and the inverse in. 379 if (!(Q.Mask & ~CVRMask)) 380 Mask &= ~Q.Mask; 381 else { 382 Mask &= ~(Q.Mask & CVRMask); 383 if (getObjCGCAttr() == Q.getObjCGCAttr()) 384 removeObjCGCAttr(); 385 if (getObjCLifetime() == Q.getObjCLifetime()) 386 removeObjCLifetime(); 387 if (getAddressSpace() == Q.getAddressSpace()) 388 removeAddressSpace(); 389 } 390 } 391 392 /// \brief Add the qualifiers from the given set to this set, given that 393 /// they don't conflict. 394 void addConsistentQualifiers(Qualifiers qs) { 395 assert(getAddressSpace() == qs.getAddressSpace() || 396 !hasAddressSpace() || !qs.hasAddressSpace()); 397 assert(getObjCGCAttr() == qs.getObjCGCAttr() || 398 !hasObjCGCAttr() || !qs.hasObjCGCAttr()); 399 assert(getObjCLifetime() == qs.getObjCLifetime() || 400 !hasObjCLifetime() || !qs.hasObjCLifetime()); 401 Mask |= qs.Mask; 402 } 403 404 /// \brief Determines if these qualifiers compatibly include another set. 405 /// Generally this answers the question of whether an object with the other 406 /// qualifiers can be safely used as an object with these qualifiers. 407 bool compatiblyIncludes(Qualifiers other) const { 408 return 409 // Address spaces must match exactly. 410 getAddressSpace() == other.getAddressSpace() && 411 // ObjC GC qualifiers can match, be added, or be removed, but can't be 412 // changed. 413 (getObjCGCAttr() == other.getObjCGCAttr() || 414 !hasObjCGCAttr() || !other.hasObjCGCAttr()) && 415 // ObjC lifetime qualifiers must match exactly. 416 getObjCLifetime() == other.getObjCLifetime() && 417 // CVR qualifiers may subset. 418 (((Mask & CVRMask) | (other.Mask & CVRMask)) == (Mask & CVRMask)); 419 } 420 421 /// \brief Determines if these qualifiers compatibly include another set of 422 /// qualifiers from the narrow perspective of Objective-C ARC lifetime. 423 /// 424 /// One set of Objective-C lifetime qualifiers compatibly includes the other 425 /// if the lifetime qualifiers match, or if both are non-__weak and the 426 /// including set also contains the 'const' qualifier. 427 bool compatiblyIncludesObjCLifetime(Qualifiers other) const { 428 if (getObjCLifetime() == other.getObjCLifetime()) 429 return true; 430 431 if (getObjCLifetime() == OCL_Weak || other.getObjCLifetime() == OCL_Weak) 432 return false; 433 434 return hasConst(); 435 } 436 437 /// \brief Determine whether this set of qualifiers is a strict superset of 438 /// another set of qualifiers, not considering qualifier compatibility. 439 bool isStrictSupersetOf(Qualifiers Other) const; 440 441 bool operator==(Qualifiers Other) const { return Mask == Other.Mask; } 442 bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; } 443 444 operator bool() const { return hasQualifiers(); } 445 446 Qualifiers &operator+=(Qualifiers R) { 447 addQualifiers(R); 448 return *this; 449 } 450 451 // Union two qualifier sets. If an enumerated qualifier appears 452 // in both sets, use the one from the right. 453 friend Qualifiers operator+(Qualifiers L, Qualifiers R) { 454 L += R; 455 return L; 456 } 457 458 Qualifiers &operator-=(Qualifiers R) { 459 removeQualifiers(R); 460 return *this; 461 } 462 463 /// \brief Compute the difference between two qualifier sets. 464 friend Qualifiers operator-(Qualifiers L, Qualifiers R) { 465 L -= R; 466 return L; 467 } 468 469 std::string getAsString() const; 470 std::string getAsString(const PrintingPolicy &Policy) const; 471 472 bool isEmptyWhenPrinted(const PrintingPolicy &Policy) const; 473 void print(raw_ostream &OS, const PrintingPolicy &Policy, 474 bool appendSpaceIfNonEmpty = false) const; 475 476 void Profile(llvm::FoldingSetNodeID &ID) const { 477 ID.AddInteger(Mask); 478 } 479 480private: 481 482 // bits: |0 1 2|3 .. 4|5 .. 7|8 ... 31| 483 // |C R V|GCAttr|Lifetime|AddressSpace| 484 uint32_t Mask; 485 486 static const uint32_t GCAttrMask = 0x18; 487 static const uint32_t GCAttrShift = 3; 488 static const uint32_t LifetimeMask = 0xE0; 489 static const uint32_t LifetimeShift = 5; 490 static const uint32_t AddressSpaceMask = ~(CVRMask|GCAttrMask|LifetimeMask); 491 static const uint32_t AddressSpaceShift = 8; 492}; 493 494/// A std::pair-like structure for storing a qualified type split 495/// into its local qualifiers and its locally-unqualified type. 496struct SplitQualType { 497 /// The locally-unqualified type. 498 const Type *Ty; 499 500 /// The local qualifiers. 501 Qualifiers Quals; 502 503 SplitQualType() : Ty(0), Quals() {} 504 SplitQualType(const Type *ty, Qualifiers qs) : Ty(ty), Quals(qs) {} 505 506 SplitQualType getSingleStepDesugaredType() const; // end of this file 507 508 // Make llvm::tie work. 509 operator std::pair<const Type *,Qualifiers>() const { 510 return std::pair<const Type *,Qualifiers>(Ty, Quals); 511 } 512 513 friend bool operator==(SplitQualType a, SplitQualType b) { 514 return a.Ty == b.Ty && a.Quals == b.Quals; 515 } 516 friend bool operator!=(SplitQualType a, SplitQualType b) { 517 return a.Ty != b.Ty || a.Quals != b.Quals; 518 } 519}; 520 521/// QualType - For efficiency, we don't store CV-qualified types as nodes on 522/// their own: instead each reference to a type stores the qualifiers. This 523/// greatly reduces the number of nodes we need to allocate for types (for 524/// example we only need one for 'int', 'const int', 'volatile int', 525/// 'const volatile int', etc). 526/// 527/// As an added efficiency bonus, instead of making this a pair, we 528/// just store the two bits we care about in the low bits of the 529/// pointer. To handle the packing/unpacking, we make QualType be a 530/// simple wrapper class that acts like a smart pointer. A third bit 531/// indicates whether there are extended qualifiers present, in which 532/// case the pointer points to a special structure. 533class QualType { 534 // Thankfully, these are efficiently composable. 535 llvm::PointerIntPair<llvm::PointerUnion<const Type*,const ExtQuals*>, 536 Qualifiers::FastWidth> Value; 537 538 const ExtQuals *getExtQualsUnsafe() const { 539 return Value.getPointer().get<const ExtQuals*>(); 540 } 541 542 const Type *getTypePtrUnsafe() const { 543 return Value.getPointer().get<const Type*>(); 544 } 545 546 const ExtQualsTypeCommonBase *getCommonPtr() const { 547 assert(!isNull() && "Cannot retrieve a NULL type pointer"); 548 uintptr_t CommonPtrVal 549 = reinterpret_cast<uintptr_t>(Value.getOpaqueValue()); 550 CommonPtrVal &= ~(uintptr_t)((1 << TypeAlignmentInBits) - 1); 551 return reinterpret_cast<ExtQualsTypeCommonBase*>(CommonPtrVal); 552 } 553 554 friend class QualifierCollector; 555public: 556 QualType() {} 557 558 QualType(const Type *Ptr, unsigned Quals) 559 : Value(Ptr, Quals) {} 560 QualType(const ExtQuals *Ptr, unsigned Quals) 561 : Value(Ptr, Quals) {} 562 563 unsigned getLocalFastQualifiers() const { return Value.getInt(); } 564 void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); } 565 566 /// Retrieves a pointer to the underlying (unqualified) type. 567 /// 568 /// This function requires that the type not be NULL. If the type might be 569 /// NULL, use the (slightly less efficient) \c getTypePtrOrNull(). 570 const Type *getTypePtr() const; 571 572 const Type *getTypePtrOrNull() const; 573 574 /// Retrieves a pointer to the name of the base type. 575 const IdentifierInfo *getBaseTypeIdentifier() const; 576 577 /// Divides a QualType into its unqualified type and a set of local 578 /// qualifiers. 579 SplitQualType split() const; 580 581 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 582 static QualType getFromOpaquePtr(const void *Ptr) { 583 QualType T; 584 T.Value.setFromOpaqueValue(const_cast<void*>(Ptr)); 585 return T; 586 } 587 588 const Type &operator*() const { 589 return *getTypePtr(); 590 } 591 592 const Type *operator->() const { 593 return getTypePtr(); 594 } 595 596 bool isCanonical() const; 597 bool isCanonicalAsParam() const; 598 599 /// isNull - Return true if this QualType doesn't point to a type yet. 600 bool isNull() const { 601 return Value.getPointer().isNull(); 602 } 603 604 /// \brief Determine whether this particular QualType instance has the 605 /// "const" qualifier set, without looking through typedefs that may have 606 /// added "const" at a different level. 607 bool isLocalConstQualified() const { 608 return (getLocalFastQualifiers() & Qualifiers::Const); 609 } 610 611 /// \brief Determine whether this type is const-qualified. 612 bool isConstQualified() const; 613 614 /// \brief Determine whether this particular QualType instance has the 615 /// "restrict" qualifier set, without looking through typedefs that may have 616 /// added "restrict" at a different level. 617 bool isLocalRestrictQualified() const { 618 return (getLocalFastQualifiers() & Qualifiers::Restrict); 619 } 620 621 /// \brief Determine whether this type is restrict-qualified. 622 bool isRestrictQualified() const; 623 624 /// \brief Determine whether this particular QualType instance has the 625 /// "volatile" qualifier set, without looking through typedefs that may have 626 /// added "volatile" at a different level. 627 bool isLocalVolatileQualified() const { 628 return (getLocalFastQualifiers() & Qualifiers::Volatile); 629 } 630 631 /// \brief Determine whether this type is volatile-qualified. 632 bool isVolatileQualified() const; 633 634 /// \brief Determine whether this particular QualType instance has any 635 /// qualifiers, without looking through any typedefs that might add 636 /// qualifiers at a different level. 637 bool hasLocalQualifiers() const { 638 return getLocalFastQualifiers() || hasLocalNonFastQualifiers(); 639 } 640 641 /// \brief Determine whether this type has any qualifiers. 642 bool hasQualifiers() const; 643 644 /// \brief Determine whether this particular QualType instance has any 645 /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType 646 /// instance. 647 bool hasLocalNonFastQualifiers() const { 648 return Value.getPointer().is<const ExtQuals*>(); 649 } 650 651 /// \brief Retrieve the set of qualifiers local to this particular QualType 652 /// instance, not including any qualifiers acquired through typedefs or 653 /// other sugar. 654 Qualifiers getLocalQualifiers() const; 655 656 /// \brief Retrieve the set of qualifiers applied to this type. 657 Qualifiers getQualifiers() const; 658 659 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 660 /// local to this particular QualType instance, not including any qualifiers 661 /// acquired through typedefs or other sugar. 662 unsigned getLocalCVRQualifiers() const { 663 return getLocalFastQualifiers(); 664 } 665 666 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 667 /// applied to this type. 668 unsigned getCVRQualifiers() const; 669 670 bool isConstant(ASTContext& Ctx) const { 671 return QualType::isConstant(*this, Ctx); 672 } 673 674 /// \brief Determine whether this is a Plain Old Data (POD) type (C++ 3.9p10). 675 bool isPODType(ASTContext &Context) const; 676 677 /// isCXX98PODType() - Return true if this is a POD type according to the 678 /// rules of the C++98 standard, regardless of the current compilation's 679 /// language. 680 bool isCXX98PODType(ASTContext &Context) const; 681 682 /// isCXX11PODType() - Return true if this is a POD type according to the 683 /// more relaxed rules of the C++11 standard, regardless of the current 684 /// compilation's language. 685 /// (C++0x [basic.types]p9) 686 bool isCXX11PODType(ASTContext &Context) const; 687 688 /// isTrivialType - Return true if this is a trivial type 689 /// (C++0x [basic.types]p9) 690 bool isTrivialType(ASTContext &Context) const; 691 692 /// isTriviallyCopyableType - Return true if this is a trivially 693 /// copyable type (C++0x [basic.types]p9) 694 bool isTriviallyCopyableType(ASTContext &Context) const; 695 696 // Don't promise in the API that anything besides 'const' can be 697 // easily added. 698 699 /// addConst - add the specified type qualifier to this QualType. 700 void addConst() { 701 addFastQualifiers(Qualifiers::Const); 702 } 703 QualType withConst() const { 704 return withFastQualifiers(Qualifiers::Const); 705 } 706 707 /// addVolatile - add the specified type qualifier to this QualType. 708 void addVolatile() { 709 addFastQualifiers(Qualifiers::Volatile); 710 } 711 QualType withVolatile() const { 712 return withFastQualifiers(Qualifiers::Volatile); 713 } 714 715 /// Add the restrict qualifier to this QualType. 716 void addRestrict() { 717 addFastQualifiers(Qualifiers::Restrict); 718 } 719 QualType withRestrict() const { 720 return withFastQualifiers(Qualifiers::Restrict); 721 } 722 723 QualType withCVRQualifiers(unsigned CVR) const { 724 return withFastQualifiers(CVR); 725 } 726 727 void addFastQualifiers(unsigned TQs) { 728 assert(!(TQs & ~Qualifiers::FastMask) 729 && "non-fast qualifier bits set in mask!"); 730 Value.setInt(Value.getInt() | TQs); 731 } 732 733 void removeLocalConst(); 734 void removeLocalVolatile(); 735 void removeLocalRestrict(); 736 void removeLocalCVRQualifiers(unsigned Mask); 737 738 void removeLocalFastQualifiers() { Value.setInt(0); } 739 void removeLocalFastQualifiers(unsigned Mask) { 740 assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers"); 741 Value.setInt(Value.getInt() & ~Mask); 742 } 743 744 // Creates a type with the given qualifiers in addition to any 745 // qualifiers already on this type. 746 QualType withFastQualifiers(unsigned TQs) const { 747 QualType T = *this; 748 T.addFastQualifiers(TQs); 749 return T; 750 } 751 752 // Creates a type with exactly the given fast qualifiers, removing 753 // any existing fast qualifiers. 754 QualType withExactLocalFastQualifiers(unsigned TQs) const { 755 return withoutLocalFastQualifiers().withFastQualifiers(TQs); 756 } 757 758 // Removes fast qualifiers, but leaves any extended qualifiers in place. 759 QualType withoutLocalFastQualifiers() const { 760 QualType T = *this; 761 T.removeLocalFastQualifiers(); 762 return T; 763 } 764 765 QualType getCanonicalType() const; 766 767 /// \brief Return this type with all of the instance-specific qualifiers 768 /// removed, but without removing any qualifiers that may have been applied 769 /// through typedefs. 770 QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); } 771 772 /// \brief Retrieve the unqualified variant of the given type, 773 /// removing as little sugar as possible. 774 /// 775 /// This routine looks through various kinds of sugar to find the 776 /// least-desugared type that is unqualified. For example, given: 777 /// 778 /// \code 779 /// typedef int Integer; 780 /// typedef const Integer CInteger; 781 /// typedef CInteger DifferenceType; 782 /// \endcode 783 /// 784 /// Executing \c getUnqualifiedType() on the type \c DifferenceType will 785 /// desugar until we hit the type \c Integer, which has no qualifiers on it. 786 /// 787 /// The resulting type might still be qualified if it's sugar for an array 788 /// type. To strip qualifiers even from within a sugared array type, use 789 /// ASTContext::getUnqualifiedArrayType. 790 inline QualType getUnqualifiedType() const; 791 792 /// getSplitUnqualifiedType - Retrieve the unqualified variant of the 793 /// given type, removing as little sugar as possible. 794 /// 795 /// Like getUnqualifiedType(), but also returns the set of 796 /// qualifiers that were built up. 797 /// 798 /// The resulting type might still be qualified if it's sugar for an array 799 /// type. To strip qualifiers even from within a sugared array type, use 800 /// ASTContext::getUnqualifiedArrayType. 801 inline SplitQualType getSplitUnqualifiedType() const; 802 803 /// \brief Determine whether this type is more qualified than the other 804 /// given type, requiring exact equality for non-CVR qualifiers. 805 bool isMoreQualifiedThan(QualType Other) const; 806 807 /// \brief Determine whether this type is at least as qualified as the other 808 /// given type, requiring exact equality for non-CVR qualifiers. 809 bool isAtLeastAsQualifiedAs(QualType Other) const; 810 811 QualType getNonReferenceType() const; 812 813 /// \brief Determine the type of a (typically non-lvalue) expression with the 814 /// specified result type. 815 /// 816 /// This routine should be used for expressions for which the return type is 817 /// explicitly specified (e.g., in a cast or call) and isn't necessarily 818 /// an lvalue. It removes a top-level reference (since there are no 819 /// expressions of reference type) and deletes top-level cvr-qualifiers 820 /// from non-class types (in C++) or all types (in C). 821 QualType getNonLValueExprType(ASTContext &Context) const; 822 823 /// getDesugaredType - Return the specified type with any "sugar" removed from 824 /// the type. This takes off typedefs, typeof's etc. If the outer level of 825 /// the type is already concrete, it returns it unmodified. This is similar 826 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 827 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 828 /// concrete. 829 /// 830 /// Qualifiers are left in place. 831 QualType getDesugaredType(const ASTContext &Context) const { 832 return getDesugaredType(*this, Context); 833 } 834 835 SplitQualType getSplitDesugaredType() const { 836 return getSplitDesugaredType(*this); 837 } 838 839 /// \brief Return the specified type with one level of "sugar" removed from 840 /// the type. 841 /// 842 /// This routine takes off the first typedef, typeof, etc. If the outer level 843 /// of the type is already concrete, it returns it unmodified. 844 QualType getSingleStepDesugaredType(const ASTContext &Context) const { 845 return getSingleStepDesugaredTypeImpl(*this, Context); 846 } 847 848 /// IgnoreParens - Returns the specified type after dropping any 849 /// outer-level parentheses. 850 QualType IgnoreParens() const { 851 if (isa<ParenType>(*this)) 852 return QualType::IgnoreParens(*this); 853 return *this; 854 } 855 856 /// operator==/!= - Indicate whether the specified types and qualifiers are 857 /// identical. 858 friend bool operator==(const QualType &LHS, const QualType &RHS) { 859 return LHS.Value == RHS.Value; 860 } 861 friend bool operator!=(const QualType &LHS, const QualType &RHS) { 862 return LHS.Value != RHS.Value; 863 } 864 std::string getAsString() const { 865 return getAsString(split()); 866 } 867 static std::string getAsString(SplitQualType split) { 868 return getAsString(split.Ty, split.Quals); 869 } 870 static std::string getAsString(const Type *ty, Qualifiers qs); 871 872 std::string getAsString(const PrintingPolicy &Policy) const; 873 874 void print(raw_ostream &OS, const PrintingPolicy &Policy, 875 const Twine &PlaceHolder = Twine()) const { 876 print(split(), OS, Policy, PlaceHolder); 877 } 878 static void print(SplitQualType split, raw_ostream &OS, 879 const PrintingPolicy &policy, const Twine &PlaceHolder) { 880 return print(split.Ty, split.Quals, OS, policy, PlaceHolder); 881 } 882 static void print(const Type *ty, Qualifiers qs, 883 raw_ostream &OS, const PrintingPolicy &policy, 884 const Twine &PlaceHolder); 885 886 void getAsStringInternal(std::string &Str, 887 const PrintingPolicy &Policy) const { 888 return getAsStringInternal(split(), Str, Policy); 889 } 890 static void getAsStringInternal(SplitQualType split, std::string &out, 891 const PrintingPolicy &policy) { 892 return getAsStringInternal(split.Ty, split.Quals, out, policy); 893 } 894 static void getAsStringInternal(const Type *ty, Qualifiers qs, 895 std::string &out, 896 const PrintingPolicy &policy); 897 898 class StreamedQualTypeHelper { 899 const QualType &T; 900 const PrintingPolicy &Policy; 901 const Twine &PlaceHolder; 902 public: 903 StreamedQualTypeHelper(const QualType &T, const PrintingPolicy &Policy, 904 const Twine &PlaceHolder) 905 : T(T), Policy(Policy), PlaceHolder(PlaceHolder) { } 906 907 friend raw_ostream &operator<<(raw_ostream &OS, 908 const StreamedQualTypeHelper &SQT) { 909 SQT.T.print(OS, SQT.Policy, SQT.PlaceHolder); 910 return OS; 911 } 912 }; 913 914 StreamedQualTypeHelper stream(const PrintingPolicy &Policy, 915 const Twine &PlaceHolder = Twine()) const { 916 return StreamedQualTypeHelper(*this, Policy, PlaceHolder); 917 } 918 919 void dump(const char *s) const; 920 void dump() const; 921 922 void Profile(llvm::FoldingSetNodeID &ID) const { 923 ID.AddPointer(getAsOpaquePtr()); 924 } 925 926 /// getAddressSpace - Return the address space of this type. 927 inline unsigned getAddressSpace() const; 928 929 /// getObjCGCAttr - Returns gc attribute of this type. 930 inline Qualifiers::GC getObjCGCAttr() const; 931 932 /// isObjCGCWeak true when Type is objc's weak. 933 bool isObjCGCWeak() const { 934 return getObjCGCAttr() == Qualifiers::Weak; 935 } 936 937 /// isObjCGCStrong true when Type is objc's strong. 938 bool isObjCGCStrong() const { 939 return getObjCGCAttr() == Qualifiers::Strong; 940 } 941 942 /// getObjCLifetime - Returns lifetime attribute of this type. 943 Qualifiers::ObjCLifetime getObjCLifetime() const { 944 return getQualifiers().getObjCLifetime(); 945 } 946 947 bool hasNonTrivialObjCLifetime() const { 948 return getQualifiers().hasNonTrivialObjCLifetime(); 949 } 950 951 bool hasStrongOrWeakObjCLifetime() const { 952 return getQualifiers().hasStrongOrWeakObjCLifetime(); 953 } 954 955 enum DestructionKind { 956 DK_none, 957 DK_cxx_destructor, 958 DK_objc_strong_lifetime, 959 DK_objc_weak_lifetime 960 }; 961 962 /// isDestructedType - nonzero if objects of this type require 963 /// non-trivial work to clean up after. Non-zero because it's 964 /// conceivable that qualifiers (objc_gc(weak)?) could make 965 /// something require destruction. 966 DestructionKind isDestructedType() const { 967 return isDestructedTypeImpl(*this); 968 } 969 970 /// \brief Determine whether expressions of the given type are forbidden 971 /// from being lvalues in C. 972 /// 973 /// The expression types that are forbidden to be lvalues are: 974 /// - 'void', but not qualified void 975 /// - function types 976 /// 977 /// The exact rule here is C99 6.3.2.1: 978 /// An lvalue is an expression with an object type or an incomplete 979 /// type other than void. 980 bool isCForbiddenLValueType() const; 981 982private: 983 // These methods are implemented in a separate translation unit; 984 // "static"-ize them to avoid creating temporary QualTypes in the 985 // caller. 986 static bool isConstant(QualType T, ASTContext& Ctx); 987 static QualType getDesugaredType(QualType T, const ASTContext &Context); 988 static SplitQualType getSplitDesugaredType(QualType T); 989 static SplitQualType getSplitUnqualifiedTypeImpl(QualType type); 990 static QualType getSingleStepDesugaredTypeImpl(QualType type, 991 const ASTContext &C); 992 static QualType IgnoreParens(QualType T); 993 static DestructionKind isDestructedTypeImpl(QualType type); 994}; 995 996} // end clang. 997 998namespace llvm { 999/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 1000/// to a specific Type class. 1001template<> struct simplify_type<const ::clang::QualType> { 1002 typedef const ::clang::Type *SimpleType; 1003 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 1004 return Val.getTypePtr(); 1005 } 1006}; 1007template<> struct simplify_type< ::clang::QualType> 1008 : public simplify_type<const ::clang::QualType> {}; 1009 1010// Teach SmallPtrSet that QualType is "basically a pointer". 1011template<> 1012class PointerLikeTypeTraits<clang::QualType> { 1013public: 1014 static inline void *getAsVoidPointer(clang::QualType P) { 1015 return P.getAsOpaquePtr(); 1016 } 1017 static inline clang::QualType getFromVoidPointer(void *P) { 1018 return clang::QualType::getFromOpaquePtr(P); 1019 } 1020 // Various qualifiers go in low bits. 1021 enum { NumLowBitsAvailable = 0 }; 1022}; 1023 1024} // end namespace llvm 1025 1026namespace clang { 1027 1028/// \brief Base class that is common to both the \c ExtQuals and \c Type 1029/// classes, which allows \c QualType to access the common fields between the 1030/// two. 1031/// 1032class ExtQualsTypeCommonBase { 1033 ExtQualsTypeCommonBase(const Type *baseType, QualType canon) 1034 : BaseType(baseType), CanonicalType(canon) {} 1035 1036 /// \brief The "base" type of an extended qualifiers type (\c ExtQuals) or 1037 /// a self-referential pointer (for \c Type). 1038 /// 1039 /// This pointer allows an efficient mapping from a QualType to its 1040 /// underlying type pointer. 1041 const Type *const BaseType; 1042 1043 /// \brief The canonical type of this type. A QualType. 1044 QualType CanonicalType; 1045 1046 friend class QualType; 1047 friend class Type; 1048 friend class ExtQuals; 1049}; 1050 1051/// ExtQuals - We can encode up to four bits in the low bits of a 1052/// type pointer, but there are many more type qualifiers that we want 1053/// to be able to apply to an arbitrary type. Therefore we have this 1054/// struct, intended to be heap-allocated and used by QualType to 1055/// store qualifiers. 1056/// 1057/// The current design tags the 'const', 'restrict', and 'volatile' qualifiers 1058/// in three low bits on the QualType pointer; a fourth bit records whether 1059/// the pointer is an ExtQuals node. The extended qualifiers (address spaces, 1060/// Objective-C GC attributes) are much more rare. 1061class ExtQuals : public ExtQualsTypeCommonBase, public llvm::FoldingSetNode { 1062 // NOTE: changing the fast qualifiers should be straightforward as 1063 // long as you don't make 'const' non-fast. 1064 // 1. Qualifiers: 1065 // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). 1066 // Fast qualifiers must occupy the low-order bits. 1067 // b) Update Qualifiers::FastWidth and FastMask. 1068 // 2. QualType: 1069 // a) Update is{Volatile,Restrict}Qualified(), defined inline. 1070 // b) Update remove{Volatile,Restrict}, defined near the end of 1071 // this header. 1072 // 3. ASTContext: 1073 // a) Update get{Volatile,Restrict}Type. 1074 1075 /// Quals - the immutable set of qualifiers applied by this 1076 /// node; always contains extended qualifiers. 1077 Qualifiers Quals; 1078 1079 ExtQuals *this_() { return this; } 1080 1081public: 1082 ExtQuals(const Type *baseType, QualType canon, Qualifiers quals) 1083 : ExtQualsTypeCommonBase(baseType, 1084 canon.isNull() ? QualType(this_(), 0) : canon), 1085 Quals(quals) 1086 { 1087 assert(Quals.hasNonFastQualifiers() 1088 && "ExtQuals created with no fast qualifiers"); 1089 assert(!Quals.hasFastQualifiers() 1090 && "ExtQuals created with fast qualifiers"); 1091 } 1092 1093 Qualifiers getQualifiers() const { return Quals; } 1094 1095 bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } 1096 Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } 1097 1098 bool hasObjCLifetime() const { return Quals.hasObjCLifetime(); } 1099 Qualifiers::ObjCLifetime getObjCLifetime() const { 1100 return Quals.getObjCLifetime(); 1101 } 1102 1103 bool hasAddressSpace() const { return Quals.hasAddressSpace(); } 1104 unsigned getAddressSpace() const { return Quals.getAddressSpace(); } 1105 1106 const Type *getBaseType() const { return BaseType; } 1107 1108public: 1109 void Profile(llvm::FoldingSetNodeID &ID) const { 1110 Profile(ID, getBaseType(), Quals); 1111 } 1112 static void Profile(llvm::FoldingSetNodeID &ID, 1113 const Type *BaseType, 1114 Qualifiers Quals) { 1115 assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!"); 1116 ID.AddPointer(BaseType); 1117 Quals.Profile(ID); 1118 } 1119}; 1120 1121/// \brief The kind of C++0x ref-qualifier associated with a function type, 1122/// which determines whether a member function's "this" object can be an 1123/// lvalue, rvalue, or neither. 1124enum RefQualifierKind { 1125 /// \brief No ref-qualifier was provided. 1126 RQ_None = 0, 1127 /// \brief An lvalue ref-qualifier was provided (\c &). 1128 RQ_LValue, 1129 /// \brief An rvalue ref-qualifier was provided (\c &&). 1130 RQ_RValue 1131}; 1132 1133/// Type - This is the base class of the type hierarchy. A central concept 1134/// with types is that each type always has a canonical type. A canonical type 1135/// is the type with any typedef names stripped out of it or the types it 1136/// references. For example, consider: 1137/// 1138/// typedef int foo; 1139/// typedef foo* bar; 1140/// 'int *' 'foo *' 'bar' 1141/// 1142/// There will be a Type object created for 'int'. Since int is canonical, its 1143/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 1144/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 1145/// there is a PointerType that represents 'int*', which, like 'int', is 1146/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 1147/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 1148/// is also 'int*'. 1149/// 1150/// Non-canonical types are useful for emitting diagnostics, without losing 1151/// information about typedefs being used. Canonical types are useful for type 1152/// comparisons (they allow by-pointer equality tests) and useful for reasoning 1153/// about whether something has a particular form (e.g. is a function type), 1154/// because they implicitly, recursively, strip all typedefs out of a type. 1155/// 1156/// Types, once created, are immutable. 1157/// 1158class Type : public ExtQualsTypeCommonBase { 1159public: 1160 enum TypeClass { 1161#define TYPE(Class, Base) Class, 1162#define LAST_TYPE(Class) TypeLast = Class, 1163#define ABSTRACT_TYPE(Class, Base) 1164#include "clang/AST/TypeNodes.def" 1165 TagFirst = Record, TagLast = Enum 1166 }; 1167 1168private: 1169 Type(const Type &) LLVM_DELETED_FUNCTION; 1170 void operator=(const Type &) LLVM_DELETED_FUNCTION; 1171 1172 /// Bitfields required by the Type class. 1173 class TypeBitfields { 1174 friend class Type; 1175 template <class T> friend class TypePropertyCache; 1176 1177 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 1178 unsigned TC : 8; 1179 1180 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 1181 unsigned Dependent : 1; 1182 1183 /// \brief Whether this type somehow involves a template parameter, even 1184 /// if the resolution of the type does not depend on a template parameter. 1185 unsigned InstantiationDependent : 1; 1186 1187 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 1188 unsigned VariablyModified : 1; 1189 1190 /// \brief Whether this type contains an unexpanded parameter pack 1191 /// (for C++0x variadic templates). 1192 unsigned ContainsUnexpandedParameterPack : 1; 1193 1194 /// \brief Nonzero if the cache (i.e. the bitfields here starting 1195 /// with 'Cache') is valid. If so, then this is a 1196 /// LangOptions::VisibilityMode+1. 1197 mutable unsigned CacheValidAndVisibility : 2; 1198 1199 /// \brief True if the visibility was set explicitly in the source code. 1200 mutable unsigned CachedExplicitVisibility : 1; 1201 1202 /// \brief Linkage of this type. 1203 mutable unsigned CachedLinkage : 2; 1204 1205 /// \brief Whether this type involves and local or unnamed types. 1206 mutable unsigned CachedLocalOrUnnamed : 1; 1207 1208 /// \brief FromAST - Whether this type comes from an AST file. 1209 mutable unsigned FromAST : 1; 1210 1211 bool isCacheValid() const { 1212 return (CacheValidAndVisibility != 0); 1213 } 1214 Visibility getVisibility() const { 1215 assert(isCacheValid() && "getting linkage from invalid cache"); 1216 return static_cast<Visibility>(CacheValidAndVisibility-1); 1217 } 1218 bool isVisibilityExplicit() const { 1219 assert(isCacheValid() && "getting linkage from invalid cache"); 1220 return CachedExplicitVisibility; 1221 } 1222 Linkage getLinkage() const { 1223 assert(isCacheValid() && "getting linkage from invalid cache"); 1224 return static_cast<Linkage>(CachedLinkage); 1225 } 1226 bool hasLocalOrUnnamedType() const { 1227 assert(isCacheValid() && "getting linkage from invalid cache"); 1228 return CachedLocalOrUnnamed; 1229 } 1230 }; 1231 enum { NumTypeBits = 19 }; 1232 1233protected: 1234 // These classes allow subclasses to somewhat cleanly pack bitfields 1235 // into Type. 1236 1237 class ArrayTypeBitfields { 1238 friend class ArrayType; 1239 1240 unsigned : NumTypeBits; 1241 1242 /// IndexTypeQuals - CVR qualifiers from declarations like 1243 /// 'int X[static restrict 4]'. For function parameters only. 1244 unsigned IndexTypeQuals : 3; 1245 1246 /// SizeModifier - storage class qualifiers from declarations like 1247 /// 'int X[static restrict 4]'. For function parameters only. 1248 /// Actually an ArrayType::ArraySizeModifier. 1249 unsigned SizeModifier : 3; 1250 }; 1251 1252 class BuiltinTypeBitfields { 1253 friend class BuiltinType; 1254 1255 unsigned : NumTypeBits; 1256 1257 /// The kind (BuiltinType::Kind) of builtin type this is. 1258 unsigned Kind : 8; 1259 }; 1260 1261 class FunctionTypeBitfields { 1262 friend class FunctionType; 1263 1264 unsigned : NumTypeBits; 1265 1266 /// Extra information which affects how the function is called, like 1267 /// regparm and the calling convention. 1268 unsigned ExtInfo : 9; 1269 1270 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1271 /// other bitfields. 1272 /// The qualifiers are part of FunctionProtoType because... 1273 /// 1274 /// C++ 8.3.5p4: The return type, the parameter type list and the 1275 /// cv-qualifier-seq, [...], are part of the function type. 1276 unsigned TypeQuals : 3; 1277 }; 1278 1279 class ObjCObjectTypeBitfields { 1280 friend class ObjCObjectType; 1281 1282 unsigned : NumTypeBits; 1283 1284 /// NumProtocols - The number of protocols stored directly on this 1285 /// object type. 1286 unsigned NumProtocols : 32 - NumTypeBits; 1287 }; 1288 1289 class ReferenceTypeBitfields { 1290 friend class ReferenceType; 1291 1292 unsigned : NumTypeBits; 1293 1294 /// True if the type was originally spelled with an lvalue sigil. 1295 /// This is never true of rvalue references but can also be false 1296 /// on lvalue references because of C++0x [dcl.typedef]p9, 1297 /// as follows: 1298 /// 1299 /// typedef int &ref; // lvalue, spelled lvalue 1300 /// typedef int &&rvref; // rvalue 1301 /// ref &a; // lvalue, inner ref, spelled lvalue 1302 /// ref &&a; // lvalue, inner ref 1303 /// rvref &a; // lvalue, inner ref, spelled lvalue 1304 /// rvref &&a; // rvalue, inner ref 1305 unsigned SpelledAsLValue : 1; 1306 1307 /// True if the inner type is a reference type. This only happens 1308 /// in non-canonical forms. 1309 unsigned InnerRef : 1; 1310 }; 1311 1312 class TypeWithKeywordBitfields { 1313 friend class TypeWithKeyword; 1314 1315 unsigned : NumTypeBits; 1316 1317 /// An ElaboratedTypeKeyword. 8 bits for efficient access. 1318 unsigned Keyword : 8; 1319 }; 1320 1321 class VectorTypeBitfields { 1322 friend class VectorType; 1323 1324 unsigned : NumTypeBits; 1325 1326 /// VecKind - The kind of vector, either a generic vector type or some 1327 /// target-specific vector type such as for AltiVec or Neon. 1328 unsigned VecKind : 3; 1329 1330 /// NumElements - The number of elements in the vector. 1331 unsigned NumElements : 29 - NumTypeBits; 1332 }; 1333 1334 class AttributedTypeBitfields { 1335 friend class AttributedType; 1336 1337 unsigned : NumTypeBits; 1338 1339 /// AttrKind - an AttributedType::Kind 1340 unsigned AttrKind : 32 - NumTypeBits; 1341 }; 1342 1343 union { 1344 TypeBitfields TypeBits; 1345 ArrayTypeBitfields ArrayTypeBits; 1346 AttributedTypeBitfields AttributedTypeBits; 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.CacheValidAndVisibility = 0; 1377 TypeBits.CachedExplicitVisibility = false; 1378 TypeBits.CachedLocalOrUnnamed = false; 1379 TypeBits.CachedLinkage = NoLinkage; 1380 TypeBits.FromAST = false; 1381 } 1382 friend class ASTContext; 1383 1384 void setDependent(bool D = true) { 1385 TypeBits.Dependent = D; 1386 if (D) 1387 TypeBits.InstantiationDependent = true; 1388 } 1389 void setInstantiationDependent(bool D = true) { 1390 TypeBits.InstantiationDependent = D; } 1391 void setVariablyModified(bool VM = true) { TypeBits.VariablyModified = VM; 1392 } 1393 void setContainsUnexpandedParameterPack(bool PP = true) { 1394 TypeBits.ContainsUnexpandedParameterPack = PP; 1395 } 1396 1397public: 1398 TypeClass getTypeClass() const { return static_cast<TypeClass>(TypeBits.TC); } 1399 1400 /// \brief Whether this type comes from an AST file. 1401 bool isFromAST() const { return TypeBits.FromAST; } 1402 1403 /// \brief Whether this type is or contains an unexpanded parameter 1404 /// pack, used to support C++0x variadic templates. 1405 /// 1406 /// A type that contains a parameter pack shall be expanded by the 1407 /// ellipsis operator at some point. For example, the typedef in the 1408 /// following example contains an unexpanded parameter pack 'T': 1409 /// 1410 /// \code 1411 /// template<typename ...T> 1412 /// struct X { 1413 /// typedef T* pointer_types; // ill-formed; T is a parameter pack. 1414 /// }; 1415 /// \endcode 1416 /// 1417 /// Note that this routine does not specify which 1418 bool containsUnexpandedParameterPack() const { 1419 return TypeBits.ContainsUnexpandedParameterPack; 1420 } 1421 1422 /// Determines if this type would be canonical if it had no further 1423 /// qualification. 1424 bool isCanonicalUnqualified() const { 1425 return CanonicalType == QualType(this, 0); 1426 } 1427 1428 /// Pull a single level of sugar off of this locally-unqualified type. 1429 /// Users should generally prefer SplitQualType::getSingleStepDesugaredType() 1430 /// or QualType::getSingleStepDesugaredType(const ASTContext&). 1431 QualType getLocallyUnqualifiedSingleStepDesugaredType() const; 1432 1433 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 1434 /// object types, function types, and incomplete types. 1435 1436 /// isIncompleteType - Return true if this is an incomplete type. 1437 /// A type that can describe objects, but which lacks information needed to 1438 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 1439 /// routine will need to determine if the size is actually required. 1440 /// 1441 /// \brief Def If non-NULL, and the type refers to some kind of declaration 1442 /// that can be completed (such as a C struct, C++ class, or Objective-C 1443 /// class), will be set to the declaration. 1444 bool isIncompleteType(NamedDecl **Def = 0) const; 1445 1446 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 1447 /// type, in other words, not a function type. 1448 bool isIncompleteOrObjectType() const { 1449 return !isFunctionType(); 1450 } 1451 1452 /// \brief Determine whether this type is an object type. 1453 bool isObjectType() const { 1454 // C++ [basic.types]p8: 1455 // An object type is a (possibly cv-qualified) type that is not a 1456 // function type, not a reference type, and not a void type. 1457 return !isReferenceType() && !isFunctionType() && !isVoidType(); 1458 } 1459 1460 /// isLiteralType - Return true if this is a literal type 1461 /// (C++0x [basic.types]p10) 1462 bool isLiteralType() const; 1463 1464 /// \brief Test if this type is a standard-layout type. 1465 /// (C++0x [basic.type]p9) 1466 bool isStandardLayoutType() const; 1467 1468 /// Helper methods to distinguish type categories. All type predicates 1469 /// operate on the canonical type, ignoring typedefs and qualifiers. 1470 1471 /// isBuiltinType - returns true if the type is a builtin type. 1472 bool isBuiltinType() const; 1473 1474 /// isSpecificBuiltinType - Test for a particular builtin type. 1475 bool isSpecificBuiltinType(unsigned K) const; 1476 1477 /// isPlaceholderType - Test for a type which does not represent an 1478 /// actual type-system type but is instead used as a placeholder for 1479 /// various convenient purposes within Clang. All such types are 1480 /// BuiltinTypes. 1481 bool isPlaceholderType() const; 1482 const BuiltinType *getAsPlaceholderType() const; 1483 1484 /// isSpecificPlaceholderType - Test for a specific placeholder type. 1485 bool isSpecificPlaceholderType(unsigned K) const; 1486 1487 /// isNonOverloadPlaceholderType - Test for a placeholder type 1488 /// other than Overload; see BuiltinType::isNonOverloadPlaceholderType. 1489 bool isNonOverloadPlaceholderType() const; 1490 1491 /// isIntegerType() does *not* include complex integers (a GCC extension). 1492 /// isComplexIntegerType() can be used to test for complex integers. 1493 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 1494 bool isEnumeralType() const; 1495 bool isBooleanType() const; 1496 bool isCharType() const; 1497 bool isWideCharType() const; 1498 bool isChar16Type() const; 1499 bool isChar32Type() const; 1500 bool isAnyCharacterType() const; 1501 bool isIntegralType(ASTContext &Ctx) const; 1502 1503 /// \brief Determine whether this type is an integral or enumeration type. 1504 bool isIntegralOrEnumerationType() const; 1505 /// \brief Determine whether this type is an integral or unscoped enumeration 1506 /// type. 1507 bool isIntegralOrUnscopedEnumerationType() const; 1508 1509 /// Floating point categories. 1510 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 1511 /// isComplexType() does *not* include complex integers (a GCC extension). 1512 /// isComplexIntegerType() can be used to test for complex integers. 1513 bool isComplexType() const; // C99 6.2.5p11 (complex) 1514 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 1515 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 1516 bool isHalfType() const; // OpenCL 6.1.1.1, NEON (IEEE 754-2008 half) 1517 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 1518 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 1519 bool isVoidType() const; // C99 6.2.5p19 1520 bool isDerivedType() const; // C99 6.2.5p20 1521 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 1522 bool isAggregateType() const; 1523 bool isFundamentalType() const; 1524 bool isCompoundType() const; 1525 1526 // Type Predicates: Check to see if this type is structurally the specified 1527 // type, ignoring typedefs and qualifiers. 1528 bool isFunctionType() const; 1529 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 1530 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 1531 bool isPointerType() const; 1532 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 1533 bool isBlockPointerType() const; 1534 bool isVoidPointerType() const; 1535 bool isReferenceType() const; 1536 bool isLValueReferenceType() const; 1537 bool isRValueReferenceType() const; 1538 bool isFunctionPointerType() const; 1539 bool isMemberPointerType() const; 1540 bool isMemberFunctionPointerType() const; 1541 bool isMemberDataPointerType() const; 1542 bool isArrayType() const; 1543 bool isConstantArrayType() const; 1544 bool isIncompleteArrayType() const; 1545 bool isVariableArrayType() const; 1546 bool isDependentSizedArrayType() const; 1547 bool isRecordType() const; 1548 bool isClassType() const; 1549 bool isStructureType() const; 1550 bool isInterfaceType() const; 1551 bool isStructureOrClassType() const; 1552 bool isUnionType() const; 1553 bool isComplexIntegerType() const; // GCC _Complex integer type. 1554 bool isVectorType() const; // GCC vector type. 1555 bool isExtVectorType() const; // Extended vector type. 1556 bool isObjCObjectPointerType() const; // pointer to ObjC object 1557 bool isObjCRetainableType() const; // ObjC object or block pointer 1558 bool isObjCLifetimeType() const; // (array of)* retainable type 1559 bool isObjCIndirectLifetimeType() const; // (pointer to)* lifetime type 1560 bool isObjCNSObjectType() const; // __attribute__((NSObject)) 1561 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 1562 // for the common case. 1563 bool isObjCObjectType() const; // NSString or typeof(*(id)0) 1564 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 1565 bool isObjCQualifiedIdType() const; // id<foo> 1566 bool isObjCQualifiedClassType() const; // Class<foo> 1567 bool isObjCObjectOrInterfaceType() const; 1568 bool isObjCIdType() const; // id 1569 bool isObjCClassType() const; // Class 1570 bool isObjCSelType() const; // Class 1571 bool isObjCBuiltinType() const; // 'id' or 'Class' 1572 bool isObjCARCBridgableType() const; 1573 bool isCARCBridgableType() const; 1574 bool isTemplateTypeParmType() const; // C++ template type parameter 1575 bool isNullPtrType() const; // C++0x nullptr_t 1576 bool isAtomicType() const; // C11 _Atomic() 1577 1578 bool isImage1dT() const; // OpenCL image1d_t 1579 bool isImage1dArrayT() const; // OpenCL image1d_array_t 1580 bool isImage1dBufferT() const; // OpenCL image1d_buffer_t 1581 bool isImage2dT() const; // OpenCL image2d_t 1582 bool isImage2dArrayT() const; // OpenCL image2d_array_t 1583 bool isImage3dT() const; // OpenCL image3d_t 1584 1585 bool isImageType() const; // Any OpenCL image type 1586 1587 bool isSamplerT() const; // OpenCL sampler_t 1588 bool isEventT() const; // OpenCL event_t 1589 1590 bool isOpenCLSpecificType() const; // Any OpenCL specific type 1591 1592 /// Determines if this type, which must satisfy 1593 /// isObjCLifetimeType(), is implicitly __unsafe_unretained rather 1594 /// than implicitly __strong. 1595 bool isObjCARCImplicitlyUnretainedType() const; 1596 1597 /// Return the implicit lifetime for this type, which must not be dependent. 1598 Qualifiers::ObjCLifetime getObjCARCImplicitLifetime() const; 1599 1600 enum ScalarTypeKind { 1601 STK_CPointer, 1602 STK_BlockPointer, 1603 STK_ObjCObjectPointer, 1604 STK_MemberPointer, 1605 STK_Bool, 1606 STK_Integral, 1607 STK_Floating, 1608 STK_IntegralComplex, 1609 STK_FloatingComplex 1610 }; 1611 /// getScalarTypeKind - Given that this is a scalar type, classify it. 1612 ScalarTypeKind getScalarTypeKind() const; 1613 1614 /// isDependentType - Whether this type is a dependent type, meaning 1615 /// that its definition somehow depends on a template parameter 1616 /// (C++ [temp.dep.type]). 1617 bool isDependentType() const { return TypeBits.Dependent; } 1618 1619 /// \brief Determine whether this type is an instantiation-dependent type, 1620 /// meaning that the type involves a template parameter (even if the 1621 /// definition does not actually depend on the type substituted for that 1622 /// template parameter). 1623 bool isInstantiationDependentType() const { 1624 return TypeBits.InstantiationDependent; 1625 } 1626 1627 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 1628 bool isVariablyModifiedType() const { return TypeBits.VariablyModified; } 1629 1630 /// \brief Whether this type involves a variable-length array type 1631 /// with a definite size. 1632 bool hasSizedVLAType() const; 1633 1634 /// \brief Whether this type is or contains a local or unnamed type. 1635 bool hasUnnamedOrLocalType() const; 1636 1637 bool isOverloadableType() const; 1638 1639 /// \brief Determine wither this type is a C++ elaborated-type-specifier. 1640 bool isElaboratedTypeSpecifier() const; 1641 1642 bool canDecayToPointerType() const; 1643 1644 /// hasPointerRepresentation - Whether this type is represented 1645 /// natively as a pointer; this includes pointers, references, block 1646 /// pointers, and Objective-C interface, qualified id, and qualified 1647 /// interface types, as well as nullptr_t. 1648 bool hasPointerRepresentation() const; 1649 1650 /// hasObjCPointerRepresentation - Whether this type can represent 1651 /// an objective pointer type for the purpose of GC'ability 1652 bool hasObjCPointerRepresentation() const; 1653 1654 /// \brief Determine whether this type has an integer representation 1655 /// of some sort, e.g., it is an integer type or a vector. 1656 bool hasIntegerRepresentation() const; 1657 1658 /// \brief Determine whether this type has an signed integer representation 1659 /// of some sort, e.g., it is an signed integer type or a vector. 1660 bool hasSignedIntegerRepresentation() const; 1661 1662 /// \brief Determine whether this type has an unsigned integer representation 1663 /// of some sort, e.g., it is an unsigned integer type or a vector. 1664 bool hasUnsignedIntegerRepresentation() const; 1665 1666 /// \brief Determine whether this type has a floating-point representation 1667 /// of some sort, e.g., it is a floating-point type or a vector thereof. 1668 bool hasFloatingRepresentation() const; 1669 1670 // Type Checking Functions: Check to see if this type is structurally the 1671 // specified type, ignoring typedefs and qualifiers, and return a pointer to 1672 // the best type we can. 1673 const RecordType *getAsStructureType() const; 1674 /// NOTE: getAs*ArrayType are methods on ASTContext. 1675 const RecordType *getAsUnionType() const; 1676 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 1677 // The following is a convenience method that returns an ObjCObjectPointerType 1678 // for object declared using an interface. 1679 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 1680 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 1681 const ObjCObjectPointerType *getAsObjCQualifiedClassType() const; 1682 const ObjCObjectType *getAsObjCQualifiedInterfaceType() const; 1683 1684 /// \brief Retrieves the CXXRecordDecl that this type refers to, either 1685 /// because the type is a RecordType or because it is the injected-class-name 1686 /// type of a class template or class template partial specialization. 1687 CXXRecordDecl *getAsCXXRecordDecl() const; 1688 1689 /// If this is a pointer or reference to a RecordType, return the 1690 /// CXXRecordDecl that that type refers to. 1691 /// 1692 /// If this is not a pointer or reference, or the type being pointed to does 1693 /// not refer to a CXXRecordDecl, returns NULL. 1694 const CXXRecordDecl *getPointeeCXXRecordDecl() const; 1695 1696 /// \brief Get the AutoType whose type will be deduced for a variable with 1697 /// an initializer of this type. This looks through declarators like pointer 1698 /// types, but not through decltype or typedefs. 1699 AutoType *getContainedAutoType() const; 1700 1701 /// Member-template getAs<specific type>'. Look through sugar for 1702 /// an instance of \<specific type>. This scheme will eventually 1703 /// replace the specific getAsXXXX methods above. 1704 /// 1705 /// There are some specializations of this member template listed 1706 /// immediately following this class. 1707 template <typename T> const T *getAs() const; 1708 1709 /// A variant of getAs<> for array types which silently discards 1710 /// qualifiers from the outermost type. 1711 const ArrayType *getAsArrayTypeUnsafe() const; 1712 1713 /// Member-template castAs<specific type>. Look through sugar for 1714 /// the underlying instance of \<specific type>. 1715 /// 1716 /// This method has the same relationship to getAs<T> as cast<T> has 1717 /// to dyn_cast<T>; which is to say, the underlying type *must* 1718 /// have the intended type, and this method will never return null. 1719 template <typename T> const T *castAs() const; 1720 1721 /// A variant of castAs<> for array type which silently discards 1722 /// qualifiers from the outermost type. 1723 const ArrayType *castAsArrayTypeUnsafe() const; 1724 1725 /// getBaseElementTypeUnsafe - Get the base element type of this 1726 /// type, potentially discarding type qualifiers. This method 1727 /// should never be used when type qualifiers are meaningful. 1728 const Type *getBaseElementTypeUnsafe() const; 1729 1730 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 1731 /// element type of the array, potentially with type qualifiers missing. 1732 /// This method should never be used when type qualifiers are meaningful. 1733 const Type *getArrayElementTypeNoTypeQual() const; 1734 1735 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 1736 /// pointer, this returns the respective pointee. 1737 QualType getPointeeType() const; 1738 1739 /// getUnqualifiedDesugaredType() - Return the specified type with 1740 /// any "sugar" removed from the type, removing any typedefs, 1741 /// typeofs, etc., as well as any qualifiers. 1742 const Type *getUnqualifiedDesugaredType() const; 1743 1744 /// More type predicates useful for type checking/promotion 1745 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 1746 1747 /// isSignedIntegerType - Return true if this is an integer type that is 1748 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 1749 /// or an enum decl which has a signed representation. 1750 bool isSignedIntegerType() const; 1751 1752 /// isUnsignedIntegerType - Return true if this is an integer type that is 1753 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], 1754 /// or an enum decl which has an unsigned representation. 1755 bool isUnsignedIntegerType() const; 1756 1757 /// Determines whether this is an integer type that is signed or an 1758 /// enumeration types whose underlying type is a signed integer type. 1759 bool isSignedIntegerOrEnumerationType() const; 1760 1761 /// Determines whether this is an integer type that is unsigned or an 1762 /// enumeration types whose underlying type is a unsigned integer type. 1763 bool isUnsignedIntegerOrEnumerationType() const; 1764 1765 /// isConstantSizeType - Return true if this is not a variable sized type, 1766 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 1767 /// incomplete types. 1768 bool isConstantSizeType() const; 1769 1770 /// isSpecifierType - Returns true if this type can be represented by some 1771 /// set of type specifiers. 1772 bool isSpecifierType() const; 1773 1774 /// \brief Determine the linkage of this type. 1775 Linkage getLinkage() const; 1776 1777 /// \brief Determine the visibility of this type. 1778 Visibility getVisibility() const { 1779 return getLinkageAndVisibility().getVisibility(); 1780 } 1781 1782 /// \brief Return true if the visibility was explicitly set is the code. 1783 bool isVisibilityExplicit() const { 1784 return getLinkageAndVisibility().isVisibilityExplicit(); 1785 } 1786 1787 /// \brief Determine the linkage and visibility of this type. 1788 LinkageInfo getLinkageAndVisibility() const; 1789 1790 /// \brief Note that the linkage is no longer known. 1791 void ClearLinkageCache(); 1792 1793 const char *getTypeClassName() const; 1794 1795 QualType getCanonicalTypeInternal() const { 1796 return CanonicalType; 1797 } 1798 CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h 1799 LLVM_ATTRIBUTE_USED void dump() const; 1800 1801 friend class ASTReader; 1802 friend class ASTWriter; 1803}; 1804 1805/// \brief This will check for a TypedefType by removing any existing sugar 1806/// until it reaches a TypedefType or a non-sugared type. 1807template <> const TypedefType *Type::getAs() const; 1808 1809/// \brief This will check for a TemplateSpecializationType by removing any 1810/// existing sugar until it reaches a TemplateSpecializationType or a 1811/// non-sugared type. 1812template <> const TemplateSpecializationType *Type::getAs() const; 1813 1814// We can do canonical leaf types faster, because we don't have to 1815// worry about preserving child type decoration. 1816#define TYPE(Class, Base) 1817#define LEAF_TYPE(Class) \ 1818template <> inline const Class##Type *Type::getAs() const { \ 1819 return dyn_cast<Class##Type>(CanonicalType); \ 1820} \ 1821template <> inline const Class##Type *Type::castAs() const { \ 1822 return cast<Class##Type>(CanonicalType); \ 1823} 1824#include "clang/AST/TypeNodes.def" 1825 1826 1827/// BuiltinType - This class is used for builtin types like 'int'. Builtin 1828/// types are always canonical and have a literal name field. 1829class BuiltinType : public Type { 1830public: 1831 enum Kind { 1832#define BUILTIN_TYPE(Id, SingletonId) Id, 1833#define LAST_BUILTIN_TYPE(Id) LastKind = Id 1834#include "clang/AST/BuiltinTypes.def" 1835 }; 1836 1837public: 1838 BuiltinType(Kind K) 1839 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent), 1840 /*InstantiationDependent=*/(K == Dependent), 1841 /*VariablyModified=*/false, 1842 /*Unexpanded paramter pack=*/false) { 1843 BuiltinTypeBits.Kind = K; 1844 } 1845 1846 Kind getKind() const { return static_cast<Kind>(BuiltinTypeBits.Kind); } 1847 StringRef getName(const PrintingPolicy &Policy) const; 1848 const char *getNameAsCString(const PrintingPolicy &Policy) const { 1849 // The StringRef is null-terminated. 1850 StringRef str = getName(Policy); 1851 assert(!str.empty() && str.data()[str.size()] == '\0'); 1852 return str.data(); 1853 } 1854 1855 bool isSugared() const { return false; } 1856 QualType desugar() const { return QualType(this, 0); } 1857 1858 bool isInteger() const { 1859 return getKind() >= Bool && getKind() <= Int128; 1860 } 1861 1862 bool isSignedInteger() const { 1863 return getKind() >= Char_S && getKind() <= Int128; 1864 } 1865 1866 bool isUnsignedInteger() const { 1867 return getKind() >= Bool && getKind() <= UInt128; 1868 } 1869 1870 bool isFloatingPoint() const { 1871 return getKind() >= Half && getKind() <= LongDouble; 1872 } 1873 1874 /// Determines whether the given kind corresponds to a placeholder type. 1875 static bool isPlaceholderTypeKind(Kind K) { 1876 return K >= Overload; 1877 } 1878 1879 /// Determines whether this type is a placeholder type, i.e. a type 1880 /// which cannot appear in arbitrary positions in a fully-formed 1881 /// expression. 1882 bool isPlaceholderType() const { 1883 return isPlaceholderTypeKind(getKind()); 1884 } 1885 1886 /// Determines whether this type is a placeholder type other than 1887 /// Overload. Most placeholder types require only syntactic 1888 /// information about their context in order to be resolved (e.g. 1889 /// whether it is a call expression), which means they can (and 1890 /// should) be resolved in an earlier "phase" of analysis. 1891 /// Overload expressions sometimes pick up further information 1892 /// from their context, like whether the context expects a 1893 /// specific function-pointer type, and so frequently need 1894 /// special treatment. 1895 bool isNonOverloadPlaceholderType() const { 1896 return getKind() > Overload; 1897 } 1898 1899 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1900}; 1901 1902/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1903/// types (_Complex float etc) as well as the GCC integer complex extensions. 1904/// 1905class ComplexType : public Type, public llvm::FoldingSetNode { 1906 QualType ElementType; 1907 ComplexType(QualType Element, QualType CanonicalPtr) : 1908 Type(Complex, CanonicalPtr, Element->isDependentType(), 1909 Element->isInstantiationDependentType(), 1910 Element->isVariablyModifiedType(), 1911 Element->containsUnexpandedParameterPack()), 1912 ElementType(Element) { 1913 } 1914 friend class ASTContext; // ASTContext creates these. 1915 1916public: 1917 QualType getElementType() const { return ElementType; } 1918 1919 bool isSugared() const { return false; } 1920 QualType desugar() const { return QualType(this, 0); } 1921 1922 void Profile(llvm::FoldingSetNodeID &ID) { 1923 Profile(ID, getElementType()); 1924 } 1925 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1926 ID.AddPointer(Element.getAsOpaquePtr()); 1927 } 1928 1929 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1930}; 1931 1932/// ParenType - Sugar for parentheses used when specifying types. 1933/// 1934class ParenType : public Type, public llvm::FoldingSetNode { 1935 QualType Inner; 1936 1937 ParenType(QualType InnerType, QualType CanonType) : 1938 Type(Paren, CanonType, InnerType->isDependentType(), 1939 InnerType->isInstantiationDependentType(), 1940 InnerType->isVariablyModifiedType(), 1941 InnerType->containsUnexpandedParameterPack()), 1942 Inner(InnerType) { 1943 } 1944 friend class ASTContext; // ASTContext creates these. 1945 1946public: 1947 1948 QualType getInnerType() const { return Inner; } 1949 1950 bool isSugared() const { return true; } 1951 QualType desugar() const { return getInnerType(); } 1952 1953 void Profile(llvm::FoldingSetNodeID &ID) { 1954 Profile(ID, getInnerType()); 1955 } 1956 static void Profile(llvm::FoldingSetNodeID &ID, QualType Inner) { 1957 Inner.Profile(ID); 1958 } 1959 1960 static bool classof(const Type *T) { return T->getTypeClass() == Paren; } 1961}; 1962 1963/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1964/// 1965class PointerType : public Type, public llvm::FoldingSetNode { 1966 QualType PointeeType; 1967 1968 PointerType(QualType Pointee, QualType CanonicalPtr) : 1969 Type(Pointer, CanonicalPtr, Pointee->isDependentType(), 1970 Pointee->isInstantiationDependentType(), 1971 Pointee->isVariablyModifiedType(), 1972 Pointee->containsUnexpandedParameterPack()), 1973 PointeeType(Pointee) { 1974 } 1975 friend class ASTContext; // ASTContext creates these. 1976 1977public: 1978 1979 QualType getPointeeType() const { return PointeeType; } 1980 1981 bool isSugared() const { return false; } 1982 QualType desugar() const { return QualType(this, 0); } 1983 1984 void Profile(llvm::FoldingSetNodeID &ID) { 1985 Profile(ID, getPointeeType()); 1986 } 1987 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1988 ID.AddPointer(Pointee.getAsOpaquePtr()); 1989 } 1990 1991 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1992}; 1993 1994/// BlockPointerType - pointer to a block type. 1995/// This type is to represent types syntactically represented as 1996/// "void (^)(int)", etc. Pointee is required to always be a function type. 1997/// 1998class BlockPointerType : public Type, public llvm::FoldingSetNode { 1999 QualType PointeeType; // Block is some kind of pointer type 2000 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 2001 Type(BlockPointer, CanonicalCls, Pointee->isDependentType(), 2002 Pointee->isInstantiationDependentType(), 2003 Pointee->isVariablyModifiedType(), 2004 Pointee->containsUnexpandedParameterPack()), 2005 PointeeType(Pointee) { 2006 } 2007 friend class ASTContext; // ASTContext creates these. 2008 2009public: 2010 2011 // Get the pointee type. Pointee is required to always be a function type. 2012 QualType getPointeeType() const { return PointeeType; } 2013 2014 bool isSugared() const { return false; } 2015 QualType desugar() const { return QualType(this, 0); } 2016 2017 void Profile(llvm::FoldingSetNodeID &ID) { 2018 Profile(ID, getPointeeType()); 2019 } 2020 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 2021 ID.AddPointer(Pointee.getAsOpaquePtr()); 2022 } 2023 2024 static bool classof(const Type *T) { 2025 return T->getTypeClass() == BlockPointer; 2026 } 2027}; 2028 2029/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 2030/// 2031class ReferenceType : public Type, public llvm::FoldingSetNode { 2032 QualType PointeeType; 2033 2034protected: 2035 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 2036 bool SpelledAsLValue) : 2037 Type(tc, CanonicalRef, Referencee->isDependentType(), 2038 Referencee->isInstantiationDependentType(), 2039 Referencee->isVariablyModifiedType(), 2040 Referencee->containsUnexpandedParameterPack()), 2041 PointeeType(Referencee) 2042 { 2043 ReferenceTypeBits.SpelledAsLValue = SpelledAsLValue; 2044 ReferenceTypeBits.InnerRef = Referencee->isReferenceType(); 2045 } 2046 2047public: 2048 bool isSpelledAsLValue() const { return ReferenceTypeBits.SpelledAsLValue; } 2049 bool isInnerRef() const { return ReferenceTypeBits.InnerRef; } 2050 2051 QualType getPointeeTypeAsWritten() const { return PointeeType; } 2052 QualType getPointeeType() const { 2053 // FIXME: this might strip inner qualifiers; okay? 2054 const ReferenceType *T = this; 2055 while (T->isInnerRef()) 2056 T = T->PointeeType->castAs<ReferenceType>(); 2057 return T->PointeeType; 2058 } 2059 2060 void Profile(llvm::FoldingSetNodeID &ID) { 2061 Profile(ID, PointeeType, isSpelledAsLValue()); 2062 } 2063 static void Profile(llvm::FoldingSetNodeID &ID, 2064 QualType Referencee, 2065 bool SpelledAsLValue) { 2066 ID.AddPointer(Referencee.getAsOpaquePtr()); 2067 ID.AddBoolean(SpelledAsLValue); 2068 } 2069 2070 static bool classof(const Type *T) { 2071 return T->getTypeClass() == LValueReference || 2072 T->getTypeClass() == RValueReference; 2073 } 2074}; 2075 2076/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 2077/// 2078class LValueReferenceType : public ReferenceType { 2079 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 2080 bool SpelledAsLValue) : 2081 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 2082 {} 2083 friend class ASTContext; // ASTContext creates these 2084public: 2085 bool isSugared() const { return false; } 2086 QualType desugar() const { return QualType(this, 0); } 2087 2088 static bool classof(const Type *T) { 2089 return T->getTypeClass() == LValueReference; 2090 } 2091}; 2092 2093/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 2094/// 2095class RValueReferenceType : public ReferenceType { 2096 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 2097 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 2098 } 2099 friend class ASTContext; // ASTContext creates these 2100public: 2101 bool isSugared() const { return false; } 2102 QualType desugar() const { return QualType(this, 0); } 2103 2104 static bool classof(const Type *T) { 2105 return T->getTypeClass() == RValueReference; 2106 } 2107}; 2108 2109/// MemberPointerType - C++ 8.3.3 - Pointers to members 2110/// 2111class MemberPointerType : public Type, public llvm::FoldingSetNode { 2112 QualType PointeeType; 2113 /// The class of which the pointee is a member. Must ultimately be a 2114 /// RecordType, but could be a typedef or a template parameter too. 2115 const Type *Class; 2116 2117 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 2118 Type(MemberPointer, CanonicalPtr, 2119 Cls->isDependentType() || Pointee->isDependentType(), 2120 (Cls->isInstantiationDependentType() || 2121 Pointee->isInstantiationDependentType()), 2122 Pointee->isVariablyModifiedType(), 2123 (Cls->containsUnexpandedParameterPack() || 2124 Pointee->containsUnexpandedParameterPack())), 2125 PointeeType(Pointee), Class(Cls) { 2126 } 2127 friend class ASTContext; // ASTContext creates these. 2128 2129public: 2130 QualType getPointeeType() const { return PointeeType; } 2131 2132 /// Returns true if the member type (i.e. the pointee type) is a 2133 /// function type rather than a data-member type. 2134 bool isMemberFunctionPointer() const { 2135 return PointeeType->isFunctionProtoType(); 2136 } 2137 2138 /// Returns true if the member type (i.e. the pointee type) is a 2139 /// data type rather than a function type. 2140 bool isMemberDataPointer() const { 2141 return !PointeeType->isFunctionProtoType(); 2142 } 2143 2144 const Type *getClass() const { return Class; } 2145 2146 bool isSugared() const { return false; } 2147 QualType desugar() const { return QualType(this, 0); } 2148 2149 void Profile(llvm::FoldingSetNodeID &ID) { 2150 Profile(ID, getPointeeType(), getClass()); 2151 } 2152 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 2153 const Type *Class) { 2154 ID.AddPointer(Pointee.getAsOpaquePtr()); 2155 ID.AddPointer(Class); 2156 } 2157 2158 static bool classof(const Type *T) { 2159 return T->getTypeClass() == MemberPointer; 2160 } 2161}; 2162 2163/// ArrayType - C99 6.7.5.2 - Array Declarators. 2164/// 2165class ArrayType : public Type, public llvm::FoldingSetNode { 2166public: 2167 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 2168 /// an array with a static size (e.g. int X[static 4]), or an array 2169 /// with a star size (e.g. int X[*]). 2170 /// 'static' is only allowed on function parameters. 2171 enum ArraySizeModifier { 2172 Normal, Static, Star 2173 }; 2174private: 2175 /// ElementType - The element type of the array. 2176 QualType ElementType; 2177 2178protected: 2179 // C++ [temp.dep.type]p1: 2180 // A type is dependent if it is... 2181 // - an array type constructed from any dependent type or whose 2182 // size is specified by a constant expression that is 2183 // value-dependent, 2184 ArrayType(TypeClass tc, QualType et, QualType can, 2185 ArraySizeModifier sm, unsigned tq, 2186 bool ContainsUnexpandedParameterPack) 2187 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray, 2188 et->isInstantiationDependentType() || tc == DependentSizedArray, 2189 (tc == VariableArray || et->isVariablyModifiedType()), 2190 ContainsUnexpandedParameterPack), 2191 ElementType(et) { 2192 ArrayTypeBits.IndexTypeQuals = tq; 2193 ArrayTypeBits.SizeModifier = sm; 2194 } 2195 2196 friend class ASTContext; // ASTContext creates these. 2197 2198public: 2199 QualType getElementType() const { return ElementType; } 2200 ArraySizeModifier getSizeModifier() const { 2201 return ArraySizeModifier(ArrayTypeBits.SizeModifier); 2202 } 2203 Qualifiers getIndexTypeQualifiers() const { 2204 return Qualifiers::fromCVRMask(getIndexTypeCVRQualifiers()); 2205 } 2206 unsigned getIndexTypeCVRQualifiers() const { 2207 return ArrayTypeBits.IndexTypeQuals; 2208 } 2209 2210 static bool classof(const Type *T) { 2211 return T->getTypeClass() == ConstantArray || 2212 T->getTypeClass() == VariableArray || 2213 T->getTypeClass() == IncompleteArray || 2214 T->getTypeClass() == DependentSizedArray; 2215 } 2216}; 2217 2218/// ConstantArrayType - This class represents the canonical version of 2219/// C arrays with a specified constant size. For example, the canonical 2220/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 2221/// type is 'int' and the size is 404. 2222class ConstantArrayType : public ArrayType { 2223 llvm::APInt Size; // Allows us to unique the type. 2224 2225 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 2226 ArraySizeModifier sm, unsigned tq) 2227 : ArrayType(ConstantArray, et, can, sm, tq, 2228 et->containsUnexpandedParameterPack()), 2229 Size(size) {} 2230protected: 2231 ConstantArrayType(TypeClass tc, QualType et, QualType can, 2232 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 2233 : ArrayType(tc, et, can, sm, tq, et->containsUnexpandedParameterPack()), 2234 Size(size) {} 2235 friend class ASTContext; // ASTContext creates these. 2236public: 2237 const llvm::APInt &getSize() const { return Size; } 2238 bool isSugared() const { return false; } 2239 QualType desugar() const { return QualType(this, 0); } 2240 2241 2242 /// \brief Determine the number of bits required to address a member of 2243 // an array with the given element type and number of elements. 2244 static unsigned getNumAddressingBits(ASTContext &Context, 2245 QualType ElementType, 2246 const llvm::APInt &NumElements); 2247 2248 /// \brief Determine the maximum number of active bits that an array's size 2249 /// can require, which limits the maximum size of the array. 2250 static unsigned getMaxSizeBits(ASTContext &Context); 2251 2252 void Profile(llvm::FoldingSetNodeID &ID) { 2253 Profile(ID, getElementType(), getSize(), 2254 getSizeModifier(), getIndexTypeCVRQualifiers()); 2255 } 2256 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 2257 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 2258 unsigned TypeQuals) { 2259 ID.AddPointer(ET.getAsOpaquePtr()); 2260 ID.AddInteger(ArraySize.getZExtValue()); 2261 ID.AddInteger(SizeMod); 2262 ID.AddInteger(TypeQuals); 2263 } 2264 static bool classof(const Type *T) { 2265 return T->getTypeClass() == ConstantArray; 2266 } 2267}; 2268 2269/// IncompleteArrayType - This class represents C arrays with an unspecified 2270/// size. For example 'int A[]' has an IncompleteArrayType where the element 2271/// type is 'int' and the size is unspecified. 2272class IncompleteArrayType : public ArrayType { 2273 2274 IncompleteArrayType(QualType et, QualType can, 2275 ArraySizeModifier sm, unsigned tq) 2276 : ArrayType(IncompleteArray, et, can, sm, tq, 2277 et->containsUnexpandedParameterPack()) {} 2278 friend class ASTContext; // ASTContext creates these. 2279public: 2280 bool isSugared() const { return false; } 2281 QualType desugar() const { return QualType(this, 0); } 2282 2283 static bool classof(const Type *T) { 2284 return T->getTypeClass() == IncompleteArray; 2285 } 2286 2287 friend class StmtIteratorBase; 2288 2289 void Profile(llvm::FoldingSetNodeID &ID) { 2290 Profile(ID, getElementType(), getSizeModifier(), 2291 getIndexTypeCVRQualifiers()); 2292 } 2293 2294 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 2295 ArraySizeModifier SizeMod, unsigned TypeQuals) { 2296 ID.AddPointer(ET.getAsOpaquePtr()); 2297 ID.AddInteger(SizeMod); 2298 ID.AddInteger(TypeQuals); 2299 } 2300}; 2301 2302/// VariableArrayType - This class represents C arrays with a specified size 2303/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 2304/// Since the size expression is an arbitrary expression, we store it as such. 2305/// 2306/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 2307/// should not be: two lexically equivalent variable array types could mean 2308/// different things, for example, these variables do not have the same type 2309/// dynamically: 2310/// 2311/// void foo(int x) { 2312/// int Y[x]; 2313/// ++x; 2314/// int Z[x]; 2315/// } 2316/// 2317class VariableArrayType : public ArrayType { 2318 /// SizeExpr - An assignment expression. VLA's are only permitted within 2319 /// a function block. 2320 Stmt *SizeExpr; 2321 /// Brackets - The left and right array brackets. 2322 SourceRange Brackets; 2323 2324 VariableArrayType(QualType et, QualType can, Expr *e, 2325 ArraySizeModifier sm, unsigned tq, 2326 SourceRange brackets) 2327 : ArrayType(VariableArray, et, can, sm, tq, 2328 et->containsUnexpandedParameterPack()), 2329 SizeExpr((Stmt*) e), Brackets(brackets) {} 2330 friend class ASTContext; // ASTContext creates these. 2331 2332public: 2333 Expr *getSizeExpr() const { 2334 // We use C-style casts instead of cast<> here because we do not wish 2335 // to have a dependency of Type.h on Stmt.h/Expr.h. 2336 return (Expr*) SizeExpr; 2337 } 2338 SourceRange getBracketsRange() const { return Brackets; } 2339 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 2340 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 2341 2342 bool isSugared() const { return false; } 2343 QualType desugar() const { return QualType(this, 0); } 2344 2345 static bool classof(const Type *T) { 2346 return T->getTypeClass() == VariableArray; 2347 } 2348 2349 friend class StmtIteratorBase; 2350 2351 void Profile(llvm::FoldingSetNodeID &ID) { 2352 llvm_unreachable("Cannot unique VariableArrayTypes."); 2353 } 2354}; 2355 2356/// DependentSizedArrayType - This type represents an array type in 2357/// C++ whose size is a value-dependent expression. For example: 2358/// 2359/// \code 2360/// template<typename T, int Size> 2361/// class array { 2362/// T data[Size]; 2363/// }; 2364/// \endcode 2365/// 2366/// For these types, we won't actually know what the array bound is 2367/// until template instantiation occurs, at which point this will 2368/// become either a ConstantArrayType or a VariableArrayType. 2369class DependentSizedArrayType : public ArrayType { 2370 const ASTContext &Context; 2371 2372 /// \brief An assignment expression that will instantiate to the 2373 /// size of the array. 2374 /// 2375 /// The expression itself might be NULL, in which case the array 2376 /// type will have its size deduced from an initializer. 2377 Stmt *SizeExpr; 2378 2379 /// Brackets - The left and right array brackets. 2380 SourceRange Brackets; 2381 2382 DependentSizedArrayType(const ASTContext &Context, QualType et, QualType can, 2383 Expr *e, ArraySizeModifier sm, unsigned tq, 2384 SourceRange brackets); 2385 2386 friend class ASTContext; // ASTContext creates these. 2387 2388public: 2389 Expr *getSizeExpr() const { 2390 // We use C-style casts instead of cast<> here because we do not wish 2391 // to have a dependency of Type.h on Stmt.h/Expr.h. 2392 return (Expr*) SizeExpr; 2393 } 2394 SourceRange getBracketsRange() const { return Brackets; } 2395 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 2396 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 2397 2398 bool isSugared() const { return false; } 2399 QualType desugar() const { return QualType(this, 0); } 2400 2401 static bool classof(const Type *T) { 2402 return T->getTypeClass() == DependentSizedArray; 2403 } 2404 2405 friend class StmtIteratorBase; 2406 2407 2408 void Profile(llvm::FoldingSetNodeID &ID) { 2409 Profile(ID, Context, getElementType(), 2410 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 2411 } 2412 2413 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2414 QualType ET, ArraySizeModifier SizeMod, 2415 unsigned TypeQuals, Expr *E); 2416}; 2417 2418/// DependentSizedExtVectorType - This type represent an extended vector type 2419/// where either the type or size is dependent. For example: 2420/// @code 2421/// template<typename T, int Size> 2422/// class vector { 2423/// typedef T __attribute__((ext_vector_type(Size))) type; 2424/// } 2425/// @endcode 2426class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 2427 const ASTContext &Context; 2428 Expr *SizeExpr; 2429 /// ElementType - The element type of the array. 2430 QualType ElementType; 2431 SourceLocation loc; 2432 2433 DependentSizedExtVectorType(const ASTContext &Context, QualType ElementType, 2434 QualType can, Expr *SizeExpr, SourceLocation loc); 2435 2436 friend class ASTContext; 2437 2438public: 2439 Expr *getSizeExpr() const { return SizeExpr; } 2440 QualType getElementType() const { return ElementType; } 2441 SourceLocation getAttributeLoc() const { return loc; } 2442 2443 bool isSugared() const { return false; } 2444 QualType desugar() const { return QualType(this, 0); } 2445 2446 static bool classof(const Type *T) { 2447 return T->getTypeClass() == DependentSizedExtVector; 2448 } 2449 2450 void Profile(llvm::FoldingSetNodeID &ID) { 2451 Profile(ID, Context, getElementType(), getSizeExpr()); 2452 } 2453 2454 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2455 QualType ElementType, Expr *SizeExpr); 2456}; 2457 2458 2459/// VectorType - GCC generic vector type. This type is created using 2460/// __attribute__((vector_size(n)), where "n" specifies the vector size in 2461/// bytes; or from an Altivec __vector or vector declaration. 2462/// Since the constructor takes the number of vector elements, the 2463/// client is responsible for converting the size into the number of elements. 2464class VectorType : public Type, public llvm::FoldingSetNode { 2465public: 2466 enum VectorKind { 2467 GenericVector, // not a target-specific vector type 2468 AltiVecVector, // is AltiVec vector 2469 AltiVecPixel, // is AltiVec 'vector Pixel' 2470 AltiVecBool, // is AltiVec 'vector bool ...' 2471 NeonVector, // is ARM Neon vector 2472 NeonPolyVector // is ARM Neon polynomial vector 2473 }; 2474protected: 2475 /// ElementType - The element type of the vector. 2476 QualType ElementType; 2477 2478 VectorType(QualType vecType, unsigned nElements, QualType canonType, 2479 VectorKind vecKind); 2480 2481 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 2482 QualType canonType, VectorKind vecKind); 2483 2484 friend class ASTContext; // ASTContext creates these. 2485 2486public: 2487 2488 QualType getElementType() const { return ElementType; } 2489 unsigned getNumElements() const { return VectorTypeBits.NumElements; } 2490 2491 bool isSugared() const { return false; } 2492 QualType desugar() const { return QualType(this, 0); } 2493 2494 VectorKind getVectorKind() const { 2495 return VectorKind(VectorTypeBits.VecKind); 2496 } 2497 2498 void Profile(llvm::FoldingSetNodeID &ID) { 2499 Profile(ID, getElementType(), getNumElements(), 2500 getTypeClass(), getVectorKind()); 2501 } 2502 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 2503 unsigned NumElements, TypeClass TypeClass, 2504 VectorKind VecKind) { 2505 ID.AddPointer(ElementType.getAsOpaquePtr()); 2506 ID.AddInteger(NumElements); 2507 ID.AddInteger(TypeClass); 2508 ID.AddInteger(VecKind); 2509 } 2510 2511 static bool classof(const Type *T) { 2512 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 2513 } 2514}; 2515 2516/// ExtVectorType - Extended vector type. This type is created using 2517/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 2518/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 2519/// class enables syntactic extensions, like Vector Components for accessing 2520/// points, colors, and textures (modeled after OpenGL Shading Language). 2521class ExtVectorType : public VectorType { 2522 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 2523 VectorType(ExtVector, vecType, nElements, canonType, GenericVector) {} 2524 friend class ASTContext; // ASTContext creates these. 2525public: 2526 static int getPointAccessorIdx(char c) { 2527 switch (c) { 2528 default: return -1; 2529 case 'x': return 0; 2530 case 'y': return 1; 2531 case 'z': return 2; 2532 case 'w': return 3; 2533 } 2534 } 2535 static int getNumericAccessorIdx(char c) { 2536 switch (c) { 2537 default: return -1; 2538 case '0': return 0; 2539 case '1': return 1; 2540 case '2': return 2; 2541 case '3': return 3; 2542 case '4': return 4; 2543 case '5': return 5; 2544 case '6': return 6; 2545 case '7': return 7; 2546 case '8': return 8; 2547 case '9': return 9; 2548 case 'A': 2549 case 'a': return 10; 2550 case 'B': 2551 case 'b': return 11; 2552 case 'C': 2553 case 'c': return 12; 2554 case 'D': 2555 case 'd': return 13; 2556 case 'E': 2557 case 'e': return 14; 2558 case 'F': 2559 case 'f': return 15; 2560 } 2561 } 2562 2563 static int getAccessorIdx(char c) { 2564 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 2565 return getNumericAccessorIdx(c); 2566 } 2567 2568 bool isAccessorWithinNumElements(char c) const { 2569 if (int idx = getAccessorIdx(c)+1) 2570 return unsigned(idx-1) < getNumElements(); 2571 return false; 2572 } 2573 bool isSugared() const { return false; } 2574 QualType desugar() const { return QualType(this, 0); } 2575 2576 static bool classof(const Type *T) { 2577 return T->getTypeClass() == ExtVector; 2578 } 2579}; 2580 2581/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 2582/// class of FunctionNoProtoType and FunctionProtoType. 2583/// 2584class FunctionType : public Type { 2585 // The type returned by the function. 2586 QualType ResultType; 2587 2588 public: 2589 /// ExtInfo - A class which abstracts out some details necessary for 2590 /// making a call. 2591 /// 2592 /// It is not actually used directly for storing this information in 2593 /// a FunctionType, although FunctionType does currently use the 2594 /// same bit-pattern. 2595 /// 2596 // If you add a field (say Foo), other than the obvious places (both, 2597 // constructors, compile failures), what you need to update is 2598 // * Operator== 2599 // * getFoo 2600 // * withFoo 2601 // * functionType. Add Foo, getFoo. 2602 // * ASTContext::getFooType 2603 // * ASTContext::mergeFunctionTypes 2604 // * FunctionNoProtoType::Profile 2605 // * FunctionProtoType::Profile 2606 // * TypePrinter::PrintFunctionProto 2607 // * AST read and write 2608 // * Codegen 2609 class ExtInfo { 2610 // Feel free to rearrange or add bits, but if you go over 9, 2611 // you'll need to adjust both the Bits field below and 2612 // Type::FunctionTypeBitfields. 2613 2614 // | CC |noreturn|produces|regparm| 2615 // |0 .. 3| 4 | 5 | 6 .. 8| 2616 // 2617 // regparm is either 0 (no regparm attribute) or the regparm value+1. 2618 enum { CallConvMask = 0xF }; 2619 enum { NoReturnMask = 0x10 }; 2620 enum { ProducesResultMask = 0x20 }; 2621 enum { RegParmMask = ~(CallConvMask | NoReturnMask | ProducesResultMask), 2622 RegParmOffset = 6 }; // Assumed to be the last field 2623 2624 uint16_t Bits; 2625 2626 ExtInfo(unsigned Bits) : Bits(static_cast<uint16_t>(Bits)) {} 2627 2628 friend class FunctionType; 2629 2630 public: 2631 // Constructor with no defaults. Use this when you know that you 2632 // have all the elements (when reading an AST file for example). 2633 ExtInfo(bool noReturn, bool hasRegParm, unsigned regParm, CallingConv cc, 2634 bool producesResult) { 2635 assert((!hasRegParm || regParm < 7) && "Invalid regparm value"); 2636 Bits = ((unsigned) cc) | 2637 (noReturn ? NoReturnMask : 0) | 2638 (producesResult ? ProducesResultMask : 0) | 2639 (hasRegParm ? ((regParm + 1) << RegParmOffset) : 0); 2640 } 2641 2642 // Constructor with all defaults. Use when for example creating a 2643 // function know to use defaults. 2644 ExtInfo() : Bits(0) {} 2645 2646 bool getNoReturn() const { return Bits & NoReturnMask; } 2647 bool getProducesResult() const { return Bits & ProducesResultMask; } 2648 bool getHasRegParm() const { return (Bits >> RegParmOffset) != 0; } 2649 unsigned getRegParm() const { 2650 unsigned RegParm = Bits >> RegParmOffset; 2651 if (RegParm > 0) 2652 --RegParm; 2653 return RegParm; 2654 } 2655 CallingConv getCC() const { return CallingConv(Bits & CallConvMask); } 2656 2657 bool operator==(ExtInfo Other) const { 2658 return Bits == Other.Bits; 2659 } 2660 bool operator!=(ExtInfo Other) const { 2661 return Bits != Other.Bits; 2662 } 2663 2664 // Note that we don't have setters. That is by design, use 2665 // the following with methods instead of mutating these objects. 2666 2667 ExtInfo withNoReturn(bool noReturn) const { 2668 if (noReturn) 2669 return ExtInfo(Bits | NoReturnMask); 2670 else 2671 return ExtInfo(Bits & ~NoReturnMask); 2672 } 2673 2674 ExtInfo withProducesResult(bool producesResult) const { 2675 if (producesResult) 2676 return ExtInfo(Bits | ProducesResultMask); 2677 else 2678 return ExtInfo(Bits & ~ProducesResultMask); 2679 } 2680 2681 ExtInfo withRegParm(unsigned RegParm) const { 2682 assert(RegParm < 7 && "Invalid regparm value"); 2683 return ExtInfo((Bits & ~RegParmMask) | 2684 ((RegParm + 1) << RegParmOffset)); 2685 } 2686 2687 ExtInfo withCallingConv(CallingConv cc) const { 2688 return ExtInfo((Bits & ~CallConvMask) | (unsigned) cc); 2689 } 2690 2691 void Profile(llvm::FoldingSetNodeID &ID) const { 2692 ID.AddInteger(Bits); 2693 } 2694 }; 2695 2696protected: 2697 FunctionType(TypeClass tc, QualType res, 2698 unsigned typeQuals, QualType Canonical, bool Dependent, 2699 bool InstantiationDependent, 2700 bool VariablyModified, bool ContainsUnexpandedParameterPack, 2701 ExtInfo Info) 2702 : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified, 2703 ContainsUnexpandedParameterPack), 2704 ResultType(res) { 2705 FunctionTypeBits.ExtInfo = Info.Bits; 2706 FunctionTypeBits.TypeQuals = typeQuals; 2707 } 2708 unsigned getTypeQuals() const { return FunctionTypeBits.TypeQuals; } 2709 2710public: 2711 2712 QualType getResultType() const { return ResultType; } 2713 2714 bool getHasRegParm() const { return getExtInfo().getHasRegParm(); } 2715 unsigned getRegParmType() const { return getExtInfo().getRegParm(); } 2716 /// \brief Determine whether this function type includes the GNU noreturn 2717 /// attribute. The C++11 [[noreturn]] attribute does not affect the function 2718 /// type. 2719 bool getNoReturnAttr() const { return getExtInfo().getNoReturn(); } 2720 CallingConv getCallConv() const { return getExtInfo().getCC(); } 2721 ExtInfo getExtInfo() const { return ExtInfo(FunctionTypeBits.ExtInfo); } 2722 bool isConst() const { return getTypeQuals() & Qualifiers::Const; } 2723 bool isVolatile() const { return getTypeQuals() & Qualifiers::Volatile; } 2724 bool isRestrict() const { return getTypeQuals() & Qualifiers::Restrict; } 2725 2726 /// \brief Determine the type of an expression that calls a function of 2727 /// this type. 2728 QualType getCallResultType(ASTContext &Context) const { 2729 return getResultType().getNonLValueExprType(Context); 2730 } 2731 2732 static StringRef getNameForCallConv(CallingConv CC); 2733 2734 static bool classof(const Type *T) { 2735 return T->getTypeClass() == FunctionNoProto || 2736 T->getTypeClass() == FunctionProto; 2737 } 2738}; 2739 2740/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 2741/// no information available about its arguments. 2742class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 2743 FunctionNoProtoType(QualType Result, QualType Canonical, ExtInfo Info) 2744 : FunctionType(FunctionNoProto, Result, 0, Canonical, 2745 /*Dependent=*/false, /*InstantiationDependent=*/false, 2746 Result->isVariablyModifiedType(), 2747 /*ContainsUnexpandedParameterPack=*/false, Info) {} 2748 2749 friend class ASTContext; // ASTContext creates these. 2750 2751public: 2752 // No additional state past what FunctionType provides. 2753 2754 bool isSugared() const { return false; } 2755 QualType desugar() const { return QualType(this, 0); } 2756 2757 void Profile(llvm::FoldingSetNodeID &ID) { 2758 Profile(ID, getResultType(), getExtInfo()); 2759 } 2760 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 2761 ExtInfo Info) { 2762 Info.Profile(ID); 2763 ID.AddPointer(ResultType.getAsOpaquePtr()); 2764 } 2765 2766 static bool classof(const Type *T) { 2767 return T->getTypeClass() == FunctionNoProto; 2768 } 2769}; 2770 2771/// FunctionProtoType - Represents a prototype with argument type info, e.g. 2772/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 2773/// arguments, not as having a single void argument. Such a type can have an 2774/// exception specification, but this specification is not part of the canonical 2775/// type. 2776class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 2777public: 2778 /// ExtProtoInfo - Extra information about a function prototype. 2779 struct ExtProtoInfo { 2780 ExtProtoInfo() : 2781 Variadic(false), HasTrailingReturn(false), TypeQuals(0), 2782 ExceptionSpecType(EST_None), RefQualifier(RQ_None), 2783 NumExceptions(0), Exceptions(0), NoexceptExpr(0), 2784 ExceptionSpecDecl(0), ExceptionSpecTemplate(0), 2785 ConsumedArguments(0) {} 2786 2787 FunctionType::ExtInfo ExtInfo; 2788 bool Variadic : 1; 2789 bool HasTrailingReturn : 1; 2790 unsigned char TypeQuals; 2791 ExceptionSpecificationType ExceptionSpecType; 2792 RefQualifierKind RefQualifier; 2793 unsigned NumExceptions; 2794 const QualType *Exceptions; 2795 Expr *NoexceptExpr; 2796 FunctionDecl *ExceptionSpecDecl; 2797 FunctionDecl *ExceptionSpecTemplate; 2798 const bool *ConsumedArguments; 2799 }; 2800 2801private: 2802 /// \brief Determine whether there are any argument types that 2803 /// contain an unexpanded parameter pack. 2804 static bool containsAnyUnexpandedParameterPack(const QualType *ArgArray, 2805 unsigned numArgs) { 2806 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 2807 if (ArgArray[Idx]->containsUnexpandedParameterPack()) 2808 return true; 2809 2810 return false; 2811 } 2812 2813 FunctionProtoType(QualType result, const QualType *args, unsigned numArgs, 2814 QualType canonical, const ExtProtoInfo &epi); 2815 2816 /// NumArgs - The number of arguments this function has, not counting '...'. 2817 unsigned NumArgs : 15; 2818 2819 /// NumExceptions - The number of types in the exception spec, if any. 2820 unsigned NumExceptions : 9; 2821 2822 /// ExceptionSpecType - The type of exception specification this function has. 2823 unsigned ExceptionSpecType : 3; 2824 2825 /// HasAnyConsumedArgs - Whether this function has any consumed arguments. 2826 unsigned HasAnyConsumedArgs : 1; 2827 2828 /// Variadic - Whether the function is variadic. 2829 unsigned Variadic : 1; 2830 2831 /// HasTrailingReturn - Whether this function has a trailing return type. 2832 unsigned HasTrailingReturn : 1; 2833 2834 /// \brief The ref-qualifier associated with a \c FunctionProtoType. 2835 /// 2836 /// This is a value of type \c RefQualifierKind. 2837 unsigned RefQualifier : 2; 2838 2839 // ArgInfo - There is an variable size array after the class in memory that 2840 // holds the argument types. 2841 2842 // Exceptions - There is another variable size array after ArgInfo that 2843 // holds the exception types. 2844 2845 // NoexceptExpr - Instead of Exceptions, there may be a single Expr* pointing 2846 // to the expression in the noexcept() specifier. 2847 2848 // ExceptionSpecDecl, ExceptionSpecTemplate - Instead of Exceptions, there may 2849 // be a pair of FunctionDecl* pointing to the function which should be used to 2850 // instantiate this function type's exception specification, and the function 2851 // from which it should be instantiated. 2852 2853 // ConsumedArgs - A variable size array, following Exceptions 2854 // and of length NumArgs, holding flags indicating which arguments 2855 // are consumed. This only appears if HasAnyConsumedArgs is true. 2856 2857 friend class ASTContext; // ASTContext creates these. 2858 2859 const bool *getConsumedArgsBuffer() const { 2860 assert(hasAnyConsumedArgs()); 2861 2862 // Find the end of the exceptions. 2863 Expr * const *eh_end = reinterpret_cast<Expr * const *>(arg_type_end()); 2864 if (getExceptionSpecType() != EST_ComputedNoexcept) 2865 eh_end += NumExceptions; 2866 else 2867 eh_end += 1; // NoexceptExpr 2868 2869 return reinterpret_cast<const bool*>(eh_end); 2870 } 2871 2872public: 2873 unsigned getNumArgs() const { return NumArgs; } 2874 QualType getArgType(unsigned i) const { 2875 assert(i < NumArgs && "Invalid argument number!"); 2876 return arg_type_begin()[i]; 2877 } 2878 2879 ExtProtoInfo getExtProtoInfo() const { 2880 ExtProtoInfo EPI; 2881 EPI.ExtInfo = getExtInfo(); 2882 EPI.Variadic = isVariadic(); 2883 EPI.HasTrailingReturn = hasTrailingReturn(); 2884 EPI.ExceptionSpecType = getExceptionSpecType(); 2885 EPI.TypeQuals = static_cast<unsigned char>(getTypeQuals()); 2886 EPI.RefQualifier = getRefQualifier(); 2887 if (EPI.ExceptionSpecType == EST_Dynamic) { 2888 EPI.NumExceptions = NumExceptions; 2889 EPI.Exceptions = exception_begin(); 2890 } else if (EPI.ExceptionSpecType == EST_ComputedNoexcept) { 2891 EPI.NoexceptExpr = getNoexceptExpr(); 2892 } else if (EPI.ExceptionSpecType == EST_Uninstantiated) { 2893 EPI.ExceptionSpecDecl = getExceptionSpecDecl(); 2894 EPI.ExceptionSpecTemplate = getExceptionSpecTemplate(); 2895 } else if (EPI.ExceptionSpecType == EST_Unevaluated) { 2896 EPI.ExceptionSpecDecl = getExceptionSpecDecl(); 2897 } 2898 if (hasAnyConsumedArgs()) 2899 EPI.ConsumedArguments = getConsumedArgsBuffer(); 2900 return EPI; 2901 } 2902 2903 /// \brief Get the kind of exception specification on this function. 2904 ExceptionSpecificationType getExceptionSpecType() const { 2905 return static_cast<ExceptionSpecificationType>(ExceptionSpecType); 2906 } 2907 /// \brief Return whether this function has any kind of exception spec. 2908 bool hasExceptionSpec() const { 2909 return getExceptionSpecType() != EST_None; 2910 } 2911 /// \brief Return whether this function has a dynamic (throw) exception spec. 2912 bool hasDynamicExceptionSpec() const { 2913 return isDynamicExceptionSpec(getExceptionSpecType()); 2914 } 2915 /// \brief Return whether this function has a noexcept exception spec. 2916 bool hasNoexceptExceptionSpec() const { 2917 return isNoexceptExceptionSpec(getExceptionSpecType()); 2918 } 2919 /// \brief Result type of getNoexceptSpec(). 2920 enum NoexceptResult { 2921 NR_NoNoexcept, ///< There is no noexcept specifier. 2922 NR_BadNoexcept, ///< The noexcept specifier has a bad expression. 2923 NR_Dependent, ///< The noexcept specifier is dependent. 2924 NR_Throw, ///< The noexcept specifier evaluates to false. 2925 NR_Nothrow ///< The noexcept specifier evaluates to true. 2926 }; 2927 /// \brief Get the meaning of the noexcept spec on this function, if any. 2928 NoexceptResult getNoexceptSpec(ASTContext &Ctx) const; 2929 unsigned getNumExceptions() const { return NumExceptions; } 2930 QualType getExceptionType(unsigned i) const { 2931 assert(i < NumExceptions && "Invalid exception number!"); 2932 return exception_begin()[i]; 2933 } 2934 Expr *getNoexceptExpr() const { 2935 if (getExceptionSpecType() != EST_ComputedNoexcept) 2936 return 0; 2937 // NoexceptExpr sits where the arguments end. 2938 return *reinterpret_cast<Expr *const *>(arg_type_end()); 2939 } 2940 /// \brief If this function type has an exception specification which hasn't 2941 /// been determined yet (either because it has not been evaluated or because 2942 /// it has not been instantiated), this is the function whose exception 2943 /// specification is represented by this type. 2944 FunctionDecl *getExceptionSpecDecl() const { 2945 if (getExceptionSpecType() != EST_Uninstantiated && 2946 getExceptionSpecType() != EST_Unevaluated) 2947 return 0; 2948 return reinterpret_cast<FunctionDecl * const *>(arg_type_end())[0]; 2949 } 2950 /// \brief If this function type has an uninstantiated exception 2951 /// specification, this is the function whose exception specification 2952 /// should be instantiated to find the exception specification for 2953 /// this type. 2954 FunctionDecl *getExceptionSpecTemplate() const { 2955 if (getExceptionSpecType() != EST_Uninstantiated) 2956 return 0; 2957 return reinterpret_cast<FunctionDecl * const *>(arg_type_end())[1]; 2958 } 2959 bool isNothrow(ASTContext &Ctx) const { 2960 ExceptionSpecificationType EST = getExceptionSpecType(); 2961 assert(EST != EST_Unevaluated && EST != EST_Uninstantiated); 2962 if (EST == EST_DynamicNone || EST == EST_BasicNoexcept) 2963 return true; 2964 if (EST != EST_ComputedNoexcept) 2965 return false; 2966 return getNoexceptSpec(Ctx) == NR_Nothrow; 2967 } 2968 2969 bool isVariadic() const { return Variadic; } 2970 2971 /// \brief Determines whether this function prototype contains a 2972 /// parameter pack at the end. 2973 /// 2974 /// A function template whose last parameter is a parameter pack can be 2975 /// called with an arbitrary number of arguments, much like a variadic 2976 /// function. 2977 bool isTemplateVariadic() const; 2978 2979 bool hasTrailingReturn() const { return HasTrailingReturn; } 2980 2981 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 2982 2983 2984 /// \brief Retrieve the ref-qualifier associated with this function type. 2985 RefQualifierKind getRefQualifier() const { 2986 return static_cast<RefQualifierKind>(RefQualifier); 2987 } 2988 2989 typedef const QualType *arg_type_iterator; 2990 arg_type_iterator arg_type_begin() const { 2991 return reinterpret_cast<const QualType *>(this+1); 2992 } 2993 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 2994 2995 typedef const QualType *exception_iterator; 2996 exception_iterator exception_begin() const { 2997 // exceptions begin where arguments end 2998 return arg_type_end(); 2999 } 3000 exception_iterator exception_end() const { 3001 if (getExceptionSpecType() != EST_Dynamic) 3002 return exception_begin(); 3003 return exception_begin() + NumExceptions; 3004 } 3005 3006 bool hasAnyConsumedArgs() const { 3007 return HasAnyConsumedArgs; 3008 } 3009 bool isArgConsumed(unsigned I) const { 3010 assert(I < getNumArgs() && "argument index out of range!"); 3011 if (hasAnyConsumedArgs()) 3012 return getConsumedArgsBuffer()[I]; 3013 return false; 3014 } 3015 3016 bool isSugared() const { return false; } 3017 QualType desugar() const { return QualType(this, 0); } 3018 3019 void printExceptionSpecification(raw_ostream &OS, 3020 const PrintingPolicy &Policy) const; 3021 3022 static bool classof(const Type *T) { 3023 return T->getTypeClass() == FunctionProto; 3024 } 3025 3026 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx); 3027 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 3028 arg_type_iterator ArgTys, unsigned NumArgs, 3029 const ExtProtoInfo &EPI, const ASTContext &Context); 3030}; 3031 3032 3033/// \brief Represents the dependent type named by a dependently-scoped 3034/// typename using declaration, e.g. 3035/// using typename Base<T>::foo; 3036/// Template instantiation turns these into the underlying type. 3037class UnresolvedUsingType : public Type { 3038 UnresolvedUsingTypenameDecl *Decl; 3039 3040 UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) 3041 : Type(UnresolvedUsing, QualType(), true, true, false, 3042 /*ContainsUnexpandedParameterPack=*/false), 3043 Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} 3044 friend class ASTContext; // ASTContext creates these. 3045public: 3046 3047 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 3048 3049 bool isSugared() const { return false; } 3050 QualType desugar() const { return QualType(this, 0); } 3051 3052 static bool classof(const Type *T) { 3053 return T->getTypeClass() == UnresolvedUsing; 3054 } 3055 3056 void Profile(llvm::FoldingSetNodeID &ID) { 3057 return Profile(ID, Decl); 3058 } 3059 static void Profile(llvm::FoldingSetNodeID &ID, 3060 UnresolvedUsingTypenameDecl *D) { 3061 ID.AddPointer(D); 3062 } 3063}; 3064 3065 3066class TypedefType : public Type { 3067 TypedefNameDecl *Decl; 3068protected: 3069 TypedefType(TypeClass tc, const TypedefNameDecl *D, QualType can) 3070 : Type(tc, can, can->isDependentType(), 3071 can->isInstantiationDependentType(), 3072 can->isVariablyModifiedType(), 3073 /*ContainsUnexpandedParameterPack=*/false), 3074 Decl(const_cast<TypedefNameDecl*>(D)) { 3075 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 3076 } 3077 friend class ASTContext; // ASTContext creates these. 3078public: 3079 3080 TypedefNameDecl *getDecl() const { return Decl; } 3081 3082 bool isSugared() const { return true; } 3083 QualType desugar() const; 3084 3085 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 3086}; 3087 3088/// TypeOfExprType (GCC extension). 3089class TypeOfExprType : public Type { 3090 Expr *TOExpr; 3091 3092protected: 3093 TypeOfExprType(Expr *E, QualType can = QualType()); 3094 friend class ASTContext; // ASTContext creates these. 3095public: 3096 Expr *getUnderlyingExpr() const { return TOExpr; } 3097 3098 /// \brief Remove a single level of sugar. 3099 QualType desugar() const; 3100 3101 /// \brief Returns whether this type directly provides sugar. 3102 bool isSugared() const; 3103 3104 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 3105}; 3106 3107/// \brief Internal representation of canonical, dependent 3108/// typeof(expr) types. 3109/// 3110/// This class is used internally by the ASTContext to manage 3111/// canonical, dependent types, only. Clients will only see instances 3112/// of this class via TypeOfExprType nodes. 3113class DependentTypeOfExprType 3114 : public TypeOfExprType, public llvm::FoldingSetNode { 3115 const ASTContext &Context; 3116 3117public: 3118 DependentTypeOfExprType(const ASTContext &Context, Expr *E) 3119 : TypeOfExprType(E), Context(Context) { } 3120 3121 void Profile(llvm::FoldingSetNodeID &ID) { 3122 Profile(ID, Context, getUnderlyingExpr()); 3123 } 3124 3125 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 3126 Expr *E); 3127}; 3128 3129/// TypeOfType (GCC extension). 3130class TypeOfType : public Type { 3131 QualType TOType; 3132 TypeOfType(QualType T, QualType can) 3133 : Type(TypeOf, can, T->isDependentType(), 3134 T->isInstantiationDependentType(), 3135 T->isVariablyModifiedType(), 3136 T->containsUnexpandedParameterPack()), 3137 TOType(T) { 3138 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 3139 } 3140 friend class ASTContext; // ASTContext creates these. 3141public: 3142 QualType getUnderlyingType() const { return TOType; } 3143 3144 /// \brief Remove a single level of sugar. 3145 QualType desugar() const { return getUnderlyingType(); } 3146 3147 /// \brief Returns whether this type directly provides sugar. 3148 bool isSugared() const { return true; } 3149 3150 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 3151}; 3152 3153/// DecltypeType (C++0x) 3154class DecltypeType : public Type { 3155 Expr *E; 3156 QualType UnderlyingType; 3157 3158protected: 3159 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 3160 friend class ASTContext; // ASTContext creates these. 3161public: 3162 Expr *getUnderlyingExpr() const { return E; } 3163 QualType getUnderlyingType() const { return UnderlyingType; } 3164 3165 /// \brief Remove a single level of sugar. 3166 QualType desugar() const; 3167 3168 /// \brief Returns whether this type directly provides sugar. 3169 bool isSugared() const; 3170 3171 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 3172}; 3173 3174/// \brief Internal representation of canonical, dependent 3175/// decltype(expr) types. 3176/// 3177/// This class is used internally by the ASTContext to manage 3178/// canonical, dependent types, only. Clients will only see instances 3179/// of this class via DecltypeType nodes. 3180class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 3181 const ASTContext &Context; 3182 3183public: 3184 DependentDecltypeType(const ASTContext &Context, Expr *E); 3185 3186 void Profile(llvm::FoldingSetNodeID &ID) { 3187 Profile(ID, Context, getUnderlyingExpr()); 3188 } 3189 3190 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 3191 Expr *E); 3192}; 3193 3194/// \brief A unary type transform, which is a type constructed from another 3195class UnaryTransformType : public Type { 3196public: 3197 enum UTTKind { 3198 EnumUnderlyingType 3199 }; 3200 3201private: 3202 /// The untransformed type. 3203 QualType BaseType; 3204 /// The transformed type if not dependent, otherwise the same as BaseType. 3205 QualType UnderlyingType; 3206 3207 UTTKind UKind; 3208protected: 3209 UnaryTransformType(QualType BaseTy, QualType UnderlyingTy, UTTKind UKind, 3210 QualType CanonicalTy); 3211 friend class ASTContext; 3212public: 3213 bool isSugared() const { return !isDependentType(); } 3214 QualType desugar() const { return UnderlyingType; } 3215 3216 QualType getUnderlyingType() const { return UnderlyingType; } 3217 QualType getBaseType() const { return BaseType; } 3218 3219 UTTKind getUTTKind() const { return UKind; } 3220 3221 static bool classof(const Type *T) { 3222 return T->getTypeClass() == UnaryTransform; 3223 } 3224}; 3225 3226class TagType : public Type { 3227 /// Stores the TagDecl associated with this type. The decl may point to any 3228 /// TagDecl that declares the entity. 3229 TagDecl * decl; 3230 3231 friend class ASTReader; 3232 3233protected: 3234 TagType(TypeClass TC, const TagDecl *D, QualType can); 3235 3236public: 3237 TagDecl *getDecl() const; 3238 3239 /// @brief Determines whether this type is in the process of being 3240 /// defined. 3241 bool isBeingDefined() const; 3242 3243 static bool classof(const Type *T) { 3244 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 3245 } 3246}; 3247 3248/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 3249/// to detect TagType objects of structs/unions/classes. 3250class RecordType : public TagType { 3251protected: 3252 explicit RecordType(const RecordDecl *D) 3253 : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3254 explicit RecordType(TypeClass TC, RecordDecl *D) 3255 : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3256 friend class ASTContext; // ASTContext creates these. 3257public: 3258 3259 RecordDecl *getDecl() const { 3260 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 3261 } 3262 3263 // FIXME: This predicate is a helper to QualType/Type. It needs to 3264 // recursively check all fields for const-ness. If any field is declared 3265 // const, it needs to return false. 3266 bool hasConstFields() const { return false; } 3267 3268 bool isSugared() const { return false; } 3269 QualType desugar() const { return QualType(this, 0); } 3270 3271 static bool classof(const Type *T) { return T->getTypeClass() == Record; } 3272}; 3273 3274/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 3275/// to detect TagType objects of enums. 3276class EnumType : public TagType { 3277 explicit EnumType(const EnumDecl *D) 3278 : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3279 friend class ASTContext; // ASTContext creates these. 3280public: 3281 3282 EnumDecl *getDecl() const { 3283 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 3284 } 3285 3286 bool isSugared() const { return false; } 3287 QualType desugar() const { return QualType(this, 0); } 3288 3289 static bool classof(const Type *T) { return T->getTypeClass() == Enum; } 3290}; 3291 3292/// AttributedType - An attributed type is a type to which a type 3293/// attribute has been applied. The "modified type" is the 3294/// fully-sugared type to which the attributed type was applied; 3295/// generally it is not canonically equivalent to the attributed type. 3296/// The "equivalent type" is the minimally-desugared type which the 3297/// type is canonically equivalent to. 3298/// 3299/// For example, in the following attributed type: 3300/// int32_t __attribute__((vector_size(16))) 3301/// - the modified type is the TypedefType for int32_t 3302/// - the equivalent type is VectorType(16, int32_t) 3303/// - the canonical type is VectorType(16, int) 3304class AttributedType : public Type, public llvm::FoldingSetNode { 3305public: 3306 // It is really silly to have yet another attribute-kind enum, but 3307 // clang::attr::Kind doesn't currently cover the pure type attrs. 3308 enum Kind { 3309 // Expression operand. 3310 attr_address_space, 3311 attr_regparm, 3312 attr_vector_size, 3313 attr_neon_vector_type, 3314 attr_neon_polyvector_type, 3315 3316 FirstExprOperandKind = attr_address_space, 3317 LastExprOperandKind = attr_neon_polyvector_type, 3318 3319 // Enumerated operand (string or keyword). 3320 attr_objc_gc, 3321 attr_objc_ownership, 3322 attr_pcs, 3323 3324 FirstEnumOperandKind = attr_objc_gc, 3325 LastEnumOperandKind = attr_pcs, 3326 3327 // No operand. 3328 attr_noreturn, 3329 attr_cdecl, 3330 attr_fastcall, 3331 attr_stdcall, 3332 attr_thiscall, 3333 attr_pascal, 3334 attr_pnaclcall, 3335 attr_inteloclbicc 3336 }; 3337 3338private: 3339 QualType ModifiedType; 3340 QualType EquivalentType; 3341 3342 friend class ASTContext; // creates these 3343 3344 AttributedType(QualType canon, Kind attrKind, 3345 QualType modified, QualType equivalent) 3346 : Type(Attributed, canon, canon->isDependentType(), 3347 canon->isInstantiationDependentType(), 3348 canon->isVariablyModifiedType(), 3349 canon->containsUnexpandedParameterPack()), 3350 ModifiedType(modified), EquivalentType(equivalent) { 3351 AttributedTypeBits.AttrKind = attrKind; 3352 } 3353 3354public: 3355 Kind getAttrKind() const { 3356 return static_cast<Kind>(AttributedTypeBits.AttrKind); 3357 } 3358 3359 QualType getModifiedType() const { return ModifiedType; } 3360 QualType getEquivalentType() const { return EquivalentType; } 3361 3362 bool isSugared() const { return true; } 3363 QualType desugar() const { return getEquivalentType(); } 3364 3365 void Profile(llvm::FoldingSetNodeID &ID) { 3366 Profile(ID, getAttrKind(), ModifiedType, EquivalentType); 3367 } 3368 3369 static void Profile(llvm::FoldingSetNodeID &ID, Kind attrKind, 3370 QualType modified, QualType equivalent) { 3371 ID.AddInteger(attrKind); 3372 ID.AddPointer(modified.getAsOpaquePtr()); 3373 ID.AddPointer(equivalent.getAsOpaquePtr()); 3374 } 3375 3376 static bool classof(const Type *T) { 3377 return T->getTypeClass() == Attributed; 3378 } 3379}; 3380 3381class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 3382 // Helper data collector for canonical types. 3383 struct CanonicalTTPTInfo { 3384 unsigned Depth : 15; 3385 unsigned ParameterPack : 1; 3386 unsigned Index : 16; 3387 }; 3388 3389 union { 3390 // Info for the canonical type. 3391 CanonicalTTPTInfo CanTTPTInfo; 3392 // Info for the non-canonical type. 3393 TemplateTypeParmDecl *TTPDecl; 3394 }; 3395 3396 /// Build a non-canonical type. 3397 TemplateTypeParmType(TemplateTypeParmDecl *TTPDecl, QualType Canon) 3398 : Type(TemplateTypeParm, Canon, /*Dependent=*/true, 3399 /*InstantiationDependent=*/true, 3400 /*VariablyModified=*/false, 3401 Canon->containsUnexpandedParameterPack()), 3402 TTPDecl(TTPDecl) { } 3403 3404 /// Build the canonical type. 3405 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 3406 : Type(TemplateTypeParm, QualType(this, 0), 3407 /*Dependent=*/true, 3408 /*InstantiationDependent=*/true, 3409 /*VariablyModified=*/false, PP) { 3410 CanTTPTInfo.Depth = D; 3411 CanTTPTInfo.Index = I; 3412 CanTTPTInfo.ParameterPack = PP; 3413 } 3414 3415 friend class ASTContext; // ASTContext creates these 3416 3417 const CanonicalTTPTInfo& getCanTTPTInfo() const { 3418 QualType Can = getCanonicalTypeInternal(); 3419 return Can->castAs<TemplateTypeParmType>()->CanTTPTInfo; 3420 } 3421 3422public: 3423 unsigned getDepth() const { return getCanTTPTInfo().Depth; } 3424 unsigned getIndex() const { return getCanTTPTInfo().Index; } 3425 bool isParameterPack() const { return getCanTTPTInfo().ParameterPack; } 3426 3427 TemplateTypeParmDecl *getDecl() const { 3428 return isCanonicalUnqualified() ? 0 : TTPDecl; 3429 } 3430 3431 IdentifierInfo *getIdentifier() const; 3432 3433 bool isSugared() const { return false; } 3434 QualType desugar() const { return QualType(this, 0); } 3435 3436 void Profile(llvm::FoldingSetNodeID &ID) { 3437 Profile(ID, getDepth(), getIndex(), isParameterPack(), getDecl()); 3438 } 3439 3440 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 3441 unsigned Index, bool ParameterPack, 3442 TemplateTypeParmDecl *TTPDecl) { 3443 ID.AddInteger(Depth); 3444 ID.AddInteger(Index); 3445 ID.AddBoolean(ParameterPack); 3446 ID.AddPointer(TTPDecl); 3447 } 3448 3449 static bool classof(const Type *T) { 3450 return T->getTypeClass() == TemplateTypeParm; 3451 } 3452}; 3453 3454/// \brief Represents the result of substituting a type for a template 3455/// type parameter. 3456/// 3457/// Within an instantiated template, all template type parameters have 3458/// been replaced with these. They are used solely to record that a 3459/// type was originally written as a template type parameter; 3460/// therefore they are never canonical. 3461class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 3462 // The original type parameter. 3463 const TemplateTypeParmType *Replaced; 3464 3465 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 3466 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType(), 3467 Canon->isInstantiationDependentType(), 3468 Canon->isVariablyModifiedType(), 3469 Canon->containsUnexpandedParameterPack()), 3470 Replaced(Param) { } 3471 3472 friend class ASTContext; 3473 3474public: 3475 /// Gets the template parameter that was substituted for. 3476 const TemplateTypeParmType *getReplacedParameter() const { 3477 return Replaced; 3478 } 3479 3480 /// Gets the type that was substituted for the template 3481 /// parameter. 3482 QualType getReplacementType() const { 3483 return getCanonicalTypeInternal(); 3484 } 3485 3486 bool isSugared() const { return true; } 3487 QualType desugar() const { return getReplacementType(); } 3488 3489 void Profile(llvm::FoldingSetNodeID &ID) { 3490 Profile(ID, getReplacedParameter(), getReplacementType()); 3491 } 3492 static void Profile(llvm::FoldingSetNodeID &ID, 3493 const TemplateTypeParmType *Replaced, 3494 QualType Replacement) { 3495 ID.AddPointer(Replaced); 3496 ID.AddPointer(Replacement.getAsOpaquePtr()); 3497 } 3498 3499 static bool classof(const Type *T) { 3500 return T->getTypeClass() == SubstTemplateTypeParm; 3501 } 3502}; 3503 3504/// \brief Represents the result of substituting a set of types for a template 3505/// type parameter pack. 3506/// 3507/// When a pack expansion in the source code contains multiple parameter packs 3508/// and those parameter packs correspond to different levels of template 3509/// parameter lists, this type node is used to represent a template type 3510/// parameter pack from an outer level, which has already had its argument pack 3511/// substituted but that still lives within a pack expansion that itself 3512/// could not be instantiated. When actually performing a substitution into 3513/// that pack expansion (e.g., when all template parameters have corresponding 3514/// arguments), this type will be replaced with the \c SubstTemplateTypeParmType 3515/// at the current pack substitution index. 3516class SubstTemplateTypeParmPackType : public Type, public llvm::FoldingSetNode { 3517 /// \brief The original type parameter. 3518 const TemplateTypeParmType *Replaced; 3519 3520 /// \brief A pointer to the set of template arguments that this 3521 /// parameter pack is instantiated with. 3522 const TemplateArgument *Arguments; 3523 3524 /// \brief The number of template arguments in \c Arguments. 3525 unsigned NumArguments; 3526 3527 SubstTemplateTypeParmPackType(const TemplateTypeParmType *Param, 3528 QualType Canon, 3529 const TemplateArgument &ArgPack); 3530 3531 friend class ASTContext; 3532 3533public: 3534 IdentifierInfo *getIdentifier() const { return Replaced->getIdentifier(); } 3535 3536 /// Gets the template parameter that was substituted for. 3537 const TemplateTypeParmType *getReplacedParameter() const { 3538 return Replaced; 3539 } 3540 3541 bool isSugared() const { return false; } 3542 QualType desugar() const { return QualType(this, 0); } 3543 3544 TemplateArgument getArgumentPack() const; 3545 3546 void Profile(llvm::FoldingSetNodeID &ID); 3547 static void Profile(llvm::FoldingSetNodeID &ID, 3548 const TemplateTypeParmType *Replaced, 3549 const TemplateArgument &ArgPack); 3550 3551 static bool classof(const Type *T) { 3552 return T->getTypeClass() == SubstTemplateTypeParmPack; 3553 } 3554}; 3555 3556/// \brief Represents a C++0x auto type. 3557/// 3558/// These types are usually a placeholder for a deduced type. However, within 3559/// templates and before the initializer is attached, there is no deduced type 3560/// and an auto type is type-dependent and canonical. 3561class AutoType : public Type, public llvm::FoldingSetNode { 3562 AutoType(QualType DeducedType) 3563 : Type(Auto, DeducedType.isNull() ? QualType(this, 0) : DeducedType, 3564 /*Dependent=*/DeducedType.isNull(), 3565 /*InstantiationDependent=*/DeducedType.isNull(), 3566 /*VariablyModified=*/false, /*ContainsParameterPack=*/false) { 3567 assert((DeducedType.isNull() || !DeducedType->isDependentType()) && 3568 "deduced a dependent type for auto"); 3569 } 3570 3571 friend class ASTContext; // ASTContext creates these 3572 3573public: 3574 bool isSugared() const { return isDeduced(); } 3575 QualType desugar() const { return getCanonicalTypeInternal(); } 3576 3577 QualType getDeducedType() const { 3578 return isDeduced() ? getCanonicalTypeInternal() : QualType(); 3579 } 3580 bool isDeduced() const { 3581 return !isDependentType(); 3582 } 3583 3584 void Profile(llvm::FoldingSetNodeID &ID) { 3585 Profile(ID, getDeducedType()); 3586 } 3587 3588 static void Profile(llvm::FoldingSetNodeID &ID, 3589 QualType Deduced) { 3590 ID.AddPointer(Deduced.getAsOpaquePtr()); 3591 } 3592 3593 static bool classof(const Type *T) { 3594 return T->getTypeClass() == Auto; 3595 } 3596}; 3597 3598/// \brief Represents a type template specialization; the template 3599/// must be a class template, a type alias template, or a template 3600/// template parameter. A template which cannot be resolved to one of 3601/// these, e.g. because it is written with a dependent scope 3602/// specifier, is instead represented as a 3603/// @c DependentTemplateSpecializationType. 3604/// 3605/// A non-dependent template specialization type is always "sugar", 3606/// typically for a @c RecordType. For example, a class template 3607/// specialization type of @c vector<int> will refer to a tag type for 3608/// the instantiation @c std::vector<int, std::allocator<int>> 3609/// 3610/// Template specializations are dependent if either the template or 3611/// any of the template arguments are dependent, in which case the 3612/// type may also be canonical. 3613/// 3614/// Instances of this type are allocated with a trailing array of 3615/// TemplateArguments, followed by a QualType representing the 3616/// non-canonical aliased type when the template is a type alias 3617/// template. 3618class TemplateSpecializationType 3619 : public Type, public llvm::FoldingSetNode { 3620 /// \brief The name of the template being specialized. This is 3621 /// either a TemplateName::Template (in which case it is a 3622 /// ClassTemplateDecl*, a TemplateTemplateParmDecl*, or a 3623 /// TypeAliasTemplateDecl*), a 3624 /// TemplateName::SubstTemplateTemplateParmPack, or a 3625 /// TemplateName::SubstTemplateTemplateParm (in which case the 3626 /// replacement must, recursively, be one of these). 3627 TemplateName Template; 3628 3629 /// \brief - The number of template arguments named in this class 3630 /// template specialization. 3631 unsigned NumArgs : 31; 3632 3633 /// \brief Whether this template specialization type is a substituted 3634 /// type alias. 3635 bool TypeAlias : 1; 3636 3637 TemplateSpecializationType(TemplateName T, 3638 const TemplateArgument *Args, 3639 unsigned NumArgs, QualType Canon, 3640 QualType Aliased); 3641 3642 friend class ASTContext; // ASTContext creates these 3643 3644public: 3645 /// \brief Determine whether any of the given template arguments are 3646 /// dependent. 3647 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 3648 unsigned NumArgs, 3649 bool &InstantiationDependent); 3650 3651 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 3652 unsigned NumArgs, 3653 bool &InstantiationDependent); 3654 3655 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &, 3656 bool &InstantiationDependent); 3657 3658 /// \brief Print a template argument list, including the '<' and '>' 3659 /// enclosing the template arguments. 3660 static void PrintTemplateArgumentList(raw_ostream &OS, 3661 const TemplateArgument *Args, 3662 unsigned NumArgs, 3663 const PrintingPolicy &Policy, 3664 bool SkipBrackets = false); 3665 3666 static void PrintTemplateArgumentList(raw_ostream &OS, 3667 const TemplateArgumentLoc *Args, 3668 unsigned NumArgs, 3669 const PrintingPolicy &Policy); 3670 3671 static void PrintTemplateArgumentList(raw_ostream &OS, 3672 const TemplateArgumentListInfo &, 3673 const PrintingPolicy &Policy); 3674 3675 /// True if this template specialization type matches a current 3676 /// instantiation in the context in which it is found. 3677 bool isCurrentInstantiation() const { 3678 return isa<InjectedClassNameType>(getCanonicalTypeInternal()); 3679 } 3680 3681 /// \brief Determine if this template specialization type is for a type alias 3682 /// template that has been substituted. 3683 /// 3684 /// Nearly every template specialization type whose template is an alias 3685 /// template will be substituted. However, this is not the case when 3686 /// the specialization contains a pack expansion but the template alias 3687 /// does not have a corresponding parameter pack, e.g., 3688 /// 3689 /// \code 3690 /// template<typename T, typename U, typename V> struct S; 3691 /// template<typename T, typename U> using A = S<T, int, U>; 3692 /// template<typename... Ts> struct X { 3693 /// typedef A<Ts...> type; // not a type alias 3694 /// }; 3695 /// \endcode 3696 bool isTypeAlias() const { return TypeAlias; } 3697 3698 /// Get the aliased type, if this is a specialization of a type alias 3699 /// template. 3700 QualType getAliasedType() const { 3701 assert(isTypeAlias() && "not a type alias template specialization"); 3702 return *reinterpret_cast<const QualType*>(end()); 3703 } 3704 3705 typedef const TemplateArgument * iterator; 3706 3707 iterator begin() const { return getArgs(); } 3708 iterator end() const; // defined inline in TemplateBase.h 3709 3710 /// \brief Retrieve the name of the template that we are specializing. 3711 TemplateName getTemplateName() const { return Template; } 3712 3713 /// \brief Retrieve the template arguments. 3714 const TemplateArgument *getArgs() const { 3715 return reinterpret_cast<const TemplateArgument *>(this + 1); 3716 } 3717 3718 /// \brief Retrieve the number of template arguments. 3719 unsigned getNumArgs() const { return NumArgs; } 3720 3721 /// \brief Retrieve a specific template argument as a type. 3722 /// \pre @c isArgType(Arg) 3723 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 3724 3725 bool isSugared() const { 3726 return !isDependentType() || isCurrentInstantiation() || isTypeAlias(); 3727 } 3728 QualType desugar() const { return getCanonicalTypeInternal(); } 3729 3730 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) { 3731 Profile(ID, Template, getArgs(), NumArgs, Ctx); 3732 if (isTypeAlias()) 3733 getAliasedType().Profile(ID); 3734 } 3735 3736 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 3737 const TemplateArgument *Args, 3738 unsigned NumArgs, 3739 const ASTContext &Context); 3740 3741 static bool classof(const Type *T) { 3742 return T->getTypeClass() == TemplateSpecialization; 3743 } 3744}; 3745 3746/// \brief The injected class name of a C++ class template or class 3747/// template partial specialization. Used to record that a type was 3748/// spelled with a bare identifier rather than as a template-id; the 3749/// equivalent for non-templated classes is just RecordType. 3750/// 3751/// Injected class name types are always dependent. Template 3752/// instantiation turns these into RecordTypes. 3753/// 3754/// Injected class name types are always canonical. This works 3755/// because it is impossible to compare an injected class name type 3756/// with the corresponding non-injected template type, for the same 3757/// reason that it is impossible to directly compare template 3758/// parameters from different dependent contexts: injected class name 3759/// types can only occur within the scope of a particular templated 3760/// declaration, and within that scope every template specialization 3761/// will canonicalize to the injected class name (when appropriate 3762/// according to the rules of the language). 3763class InjectedClassNameType : public Type { 3764 CXXRecordDecl *Decl; 3765 3766 /// The template specialization which this type represents. 3767 /// For example, in 3768 /// template <class T> class A { ... }; 3769 /// this is A<T>, whereas in 3770 /// template <class X, class Y> class A<B<X,Y> > { ... }; 3771 /// this is A<B<X,Y> >. 3772 /// 3773 /// It is always unqualified, always a template specialization type, 3774 /// and always dependent. 3775 QualType InjectedType; 3776 3777 friend class ASTContext; // ASTContext creates these. 3778 friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not 3779 // currently suitable for AST reading, too much 3780 // interdependencies. 3781 InjectedClassNameType(CXXRecordDecl *D, QualType TST) 3782 : Type(InjectedClassName, QualType(), /*Dependent=*/true, 3783 /*InstantiationDependent=*/true, 3784 /*VariablyModified=*/false, 3785 /*ContainsUnexpandedParameterPack=*/false), 3786 Decl(D), InjectedType(TST) { 3787 assert(isa<TemplateSpecializationType>(TST)); 3788 assert(!TST.hasQualifiers()); 3789 assert(TST->isDependentType()); 3790 } 3791 3792public: 3793 QualType getInjectedSpecializationType() const { return InjectedType; } 3794 const TemplateSpecializationType *getInjectedTST() const { 3795 return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); 3796 } 3797 3798 CXXRecordDecl *getDecl() const; 3799 3800 bool isSugared() const { return false; } 3801 QualType desugar() const { return QualType(this, 0); } 3802 3803 static bool classof(const Type *T) { 3804 return T->getTypeClass() == InjectedClassName; 3805 } 3806}; 3807 3808/// \brief The kind of a tag type. 3809enum TagTypeKind { 3810 /// \brief The "struct" keyword. 3811 TTK_Struct, 3812 /// \brief The "__interface" keyword. 3813 TTK_Interface, 3814 /// \brief The "union" keyword. 3815 TTK_Union, 3816 /// \brief The "class" keyword. 3817 TTK_Class, 3818 /// \brief The "enum" keyword. 3819 TTK_Enum 3820}; 3821 3822/// \brief The elaboration keyword that precedes a qualified type name or 3823/// introduces an elaborated-type-specifier. 3824enum ElaboratedTypeKeyword { 3825 /// \brief The "struct" keyword introduces the elaborated-type-specifier. 3826 ETK_Struct, 3827 /// \brief The "__interface" keyword introduces the elaborated-type-specifier. 3828 ETK_Interface, 3829 /// \brief The "union" keyword introduces the elaborated-type-specifier. 3830 ETK_Union, 3831 /// \brief The "class" keyword introduces the elaborated-type-specifier. 3832 ETK_Class, 3833 /// \brief The "enum" keyword introduces the elaborated-type-specifier. 3834 ETK_Enum, 3835 /// \brief The "typename" keyword precedes the qualified type name, e.g., 3836 /// \c typename T::type. 3837 ETK_Typename, 3838 /// \brief No keyword precedes the qualified type name. 3839 ETK_None 3840}; 3841 3842/// A helper class for Type nodes having an ElaboratedTypeKeyword. 3843/// The keyword in stored in the free bits of the base class. 3844/// Also provides a few static helpers for converting and printing 3845/// elaborated type keyword and tag type kind enumerations. 3846class TypeWithKeyword : public Type { 3847protected: 3848 TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, 3849 QualType Canonical, bool Dependent, 3850 bool InstantiationDependent, bool VariablyModified, 3851 bool ContainsUnexpandedParameterPack) 3852 : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified, 3853 ContainsUnexpandedParameterPack) { 3854 TypeWithKeywordBits.Keyword = Keyword; 3855 } 3856 3857public: 3858 ElaboratedTypeKeyword getKeyword() const { 3859 return static_cast<ElaboratedTypeKeyword>(TypeWithKeywordBits.Keyword); 3860 } 3861 3862 /// getKeywordForTypeSpec - Converts a type specifier (DeclSpec::TST) 3863 /// into an elaborated type keyword. 3864 static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); 3865 3866 /// getTagTypeKindForTypeSpec - Converts a type specifier (DeclSpec::TST) 3867 /// into a tag type kind. It is an error to provide a type specifier 3868 /// which *isn't* a tag kind here. 3869 static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); 3870 3871 /// getKeywordForTagDeclKind - Converts a TagTypeKind into an 3872 /// elaborated type keyword. 3873 static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); 3874 3875 /// getTagTypeKindForKeyword - Converts an elaborated type keyword into 3876 // a TagTypeKind. It is an error to provide an elaborated type keyword 3877 /// which *isn't* a tag kind here. 3878 static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); 3879 3880 static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); 3881 3882 static const char *getKeywordName(ElaboratedTypeKeyword Keyword); 3883 3884 static const char *getTagTypeKindName(TagTypeKind Kind) { 3885 return getKeywordName(getKeywordForTagTypeKind(Kind)); 3886 } 3887 3888 class CannotCastToThisType {}; 3889 static CannotCastToThisType classof(const Type *); 3890}; 3891 3892/// \brief Represents a type that was referred to using an elaborated type 3893/// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, 3894/// or both. 3895/// 3896/// This type is used to keep track of a type name as written in the 3897/// source code, including tag keywords and any nested-name-specifiers. 3898/// The type itself is always "sugar", used to express what was written 3899/// in the source code but containing no additional semantic information. 3900class ElaboratedType : public TypeWithKeyword, public llvm::FoldingSetNode { 3901 3902 /// \brief The nested name specifier containing the qualifier. 3903 NestedNameSpecifier *NNS; 3904 3905 /// \brief The type that this qualified name refers to. 3906 QualType NamedType; 3907 3908 ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3909 QualType NamedType, QualType CanonType) 3910 : TypeWithKeyword(Keyword, Elaborated, CanonType, 3911 NamedType->isDependentType(), 3912 NamedType->isInstantiationDependentType(), 3913 NamedType->isVariablyModifiedType(), 3914 NamedType->containsUnexpandedParameterPack()), 3915 NNS(NNS), NamedType(NamedType) { 3916 assert(!(Keyword == ETK_None && NNS == 0) && 3917 "ElaboratedType cannot have elaborated type keyword " 3918 "and name qualifier both null."); 3919 } 3920 3921 friend class ASTContext; // ASTContext creates these 3922 3923public: 3924 ~ElaboratedType(); 3925 3926 /// \brief Retrieve the qualification on this type. 3927 NestedNameSpecifier *getQualifier() const { return NNS; } 3928 3929 /// \brief Retrieve the type named by the qualified-id. 3930 QualType getNamedType() const { return NamedType; } 3931 3932 /// \brief Remove a single level of sugar. 3933 QualType desugar() const { return getNamedType(); } 3934 3935 /// \brief Returns whether this type directly provides sugar. 3936 bool isSugared() const { return true; } 3937 3938 void Profile(llvm::FoldingSetNodeID &ID) { 3939 Profile(ID, getKeyword(), NNS, NamedType); 3940 } 3941 3942 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3943 NestedNameSpecifier *NNS, QualType NamedType) { 3944 ID.AddInteger(Keyword); 3945 ID.AddPointer(NNS); 3946 NamedType.Profile(ID); 3947 } 3948 3949 static bool classof(const Type *T) { 3950 return T->getTypeClass() == Elaborated; 3951 } 3952}; 3953 3954/// \brief Represents a qualified type name for which the type name is 3955/// dependent. 3956/// 3957/// DependentNameType represents a class of dependent types that involve a 3958/// dependent nested-name-specifier (e.g., "T::") followed by a (dependent) 3959/// name of a type. The DependentNameType may start with a "typename" (for a 3960/// typename-specifier), "class", "struct", "union", or "enum" (for a 3961/// dependent elaborated-type-specifier), or nothing (in contexts where we 3962/// know that we must be referring to a type, e.g., in a base class specifier). 3963class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { 3964 3965 /// \brief The nested name specifier containing the qualifier. 3966 NestedNameSpecifier *NNS; 3967 3968 /// \brief The type that this typename specifier refers to. 3969 const IdentifierInfo *Name; 3970 3971 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3972 const IdentifierInfo *Name, QualType CanonType) 3973 : TypeWithKeyword(Keyword, DependentName, CanonType, /*Dependent=*/true, 3974 /*InstantiationDependent=*/true, 3975 /*VariablyModified=*/false, 3976 NNS->containsUnexpandedParameterPack()), 3977 NNS(NNS), Name(Name) { 3978 assert(NNS->isDependent() && 3979 "DependentNameType requires a dependent nested-name-specifier"); 3980 } 3981 3982 friend class ASTContext; // ASTContext creates these 3983 3984public: 3985 /// \brief Retrieve the qualification on this type. 3986 NestedNameSpecifier *getQualifier() const { return NNS; } 3987 3988 /// \brief Retrieve the type named by the typename specifier as an 3989 /// identifier. 3990 /// 3991 /// This routine will return a non-NULL identifier pointer when the 3992 /// form of the original typename was terminated by an identifier, 3993 /// e.g., "typename T::type". 3994 const IdentifierInfo *getIdentifier() const { 3995 return Name; 3996 } 3997 3998 bool isSugared() const { return false; } 3999 QualType desugar() const { return QualType(this, 0); } 4000 4001 void Profile(llvm::FoldingSetNodeID &ID) { 4002 Profile(ID, getKeyword(), NNS, Name); 4003 } 4004 4005 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 4006 NestedNameSpecifier *NNS, const IdentifierInfo *Name) { 4007 ID.AddInteger(Keyword); 4008 ID.AddPointer(NNS); 4009 ID.AddPointer(Name); 4010 } 4011 4012 static bool classof(const Type *T) { 4013 return T->getTypeClass() == DependentName; 4014 } 4015}; 4016 4017/// DependentTemplateSpecializationType - Represents a template 4018/// specialization type whose template cannot be resolved, e.g. 4019/// A<T>::template B<T> 4020class DependentTemplateSpecializationType : 4021 public TypeWithKeyword, public llvm::FoldingSetNode { 4022 4023 /// \brief The nested name specifier containing the qualifier. 4024 NestedNameSpecifier *NNS; 4025 4026 /// \brief The identifier of the template. 4027 const IdentifierInfo *Name; 4028 4029 /// \brief - The number of template arguments named in this class 4030 /// template specialization. 4031 unsigned NumArgs; 4032 4033 const TemplateArgument *getArgBuffer() const { 4034 return reinterpret_cast<const TemplateArgument*>(this+1); 4035 } 4036 TemplateArgument *getArgBuffer() { 4037 return reinterpret_cast<TemplateArgument*>(this+1); 4038 } 4039 4040 DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 4041 NestedNameSpecifier *NNS, 4042 const IdentifierInfo *Name, 4043 unsigned NumArgs, 4044 const TemplateArgument *Args, 4045 QualType Canon); 4046 4047 friend class ASTContext; // ASTContext creates these 4048 4049public: 4050 NestedNameSpecifier *getQualifier() const { return NNS; } 4051 const IdentifierInfo *getIdentifier() const { return Name; } 4052 4053 /// \brief Retrieve the template arguments. 4054 const TemplateArgument *getArgs() const { 4055 return getArgBuffer(); 4056 } 4057 4058 /// \brief Retrieve the number of template arguments. 4059 unsigned getNumArgs() const { return NumArgs; } 4060 4061 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 4062 4063 typedef const TemplateArgument * iterator; 4064 iterator begin() const { return getArgs(); } 4065 iterator end() const; // inline in TemplateBase.h 4066 4067 bool isSugared() const { return false; } 4068 QualType desugar() const { return QualType(this, 0); } 4069 4070 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) { 4071 Profile(ID, Context, getKeyword(), NNS, Name, NumArgs, getArgs()); 4072 } 4073 4074 static void Profile(llvm::FoldingSetNodeID &ID, 4075 const ASTContext &Context, 4076 ElaboratedTypeKeyword Keyword, 4077 NestedNameSpecifier *Qualifier, 4078 const IdentifierInfo *Name, 4079 unsigned NumArgs, 4080 const TemplateArgument *Args); 4081 4082 static bool classof(const Type *T) { 4083 return T->getTypeClass() == DependentTemplateSpecialization; 4084 } 4085}; 4086 4087/// \brief Represents a pack expansion of types. 4088/// 4089/// Pack expansions are part of C++0x variadic templates. A pack 4090/// expansion contains a pattern, which itself contains one or more 4091/// "unexpanded" parameter packs. When instantiated, a pack expansion 4092/// produces a series of types, each instantiated from the pattern of 4093/// the expansion, where the Ith instantiation of the pattern uses the 4094/// Ith arguments bound to each of the unexpanded parameter packs. The 4095/// pack expansion is considered to "expand" these unexpanded 4096/// parameter packs. 4097/// 4098/// \code 4099/// template<typename ...Types> struct tuple; 4100/// 4101/// template<typename ...Types> 4102/// struct tuple_of_references { 4103/// typedef tuple<Types&...> type; 4104/// }; 4105/// \endcode 4106/// 4107/// Here, the pack expansion \c Types&... is represented via a 4108/// PackExpansionType whose pattern is Types&. 4109class PackExpansionType : public Type, public llvm::FoldingSetNode { 4110 /// \brief The pattern of the pack expansion. 4111 QualType Pattern; 4112 4113 /// \brief The number of expansions that this pack expansion will 4114 /// generate when substituted (+1), or indicates that 4115 /// 4116 /// This field will only have a non-zero value when some of the parameter 4117 /// packs that occur within the pattern have been substituted but others have 4118 /// not. 4119 unsigned NumExpansions; 4120 4121 PackExpansionType(QualType Pattern, QualType Canon, 4122 Optional<unsigned> NumExpansions) 4123 : Type(PackExpansion, Canon, /*Dependent=*/Pattern->isDependentType(), 4124 /*InstantiationDependent=*/true, 4125 /*VariableModified=*/Pattern->isVariablyModifiedType(), 4126 /*ContainsUnexpandedParameterPack=*/false), 4127 Pattern(Pattern), 4128 NumExpansions(NumExpansions? *NumExpansions + 1: 0) { } 4129 4130 friend class ASTContext; // ASTContext creates these 4131 4132public: 4133 /// \brief Retrieve the pattern of this pack expansion, which is the 4134 /// type that will be repeatedly instantiated when instantiating the 4135 /// pack expansion itself. 4136 QualType getPattern() const { return Pattern; } 4137 4138 /// \brief Retrieve the number of expansions that this pack expansion will 4139 /// generate, if known. 4140 Optional<unsigned> getNumExpansions() const { 4141 if (NumExpansions) 4142 return NumExpansions - 1; 4143 4144 return None; 4145 } 4146 4147 bool isSugared() const { return false; } 4148 QualType desugar() const { return QualType(this, 0); } 4149 4150 void Profile(llvm::FoldingSetNodeID &ID) { 4151 Profile(ID, getPattern(), getNumExpansions()); 4152 } 4153 4154 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pattern, 4155 Optional<unsigned> NumExpansions) { 4156 ID.AddPointer(Pattern.getAsOpaquePtr()); 4157 ID.AddBoolean(NumExpansions.hasValue()); 4158 if (NumExpansions) 4159 ID.AddInteger(*NumExpansions); 4160 } 4161 4162 static bool classof(const Type *T) { 4163 return T->getTypeClass() == PackExpansion; 4164 } 4165}; 4166 4167/// ObjCObjectType - Represents a class type in Objective C. 4168/// Every Objective C type is a combination of a base type and a 4169/// list of protocols. 4170/// 4171/// Given the following declarations: 4172/// \code 4173/// \@class C; 4174/// \@protocol P; 4175/// \endcode 4176/// 4177/// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType 4178/// with base C and no protocols. 4179/// 4180/// 'C<P>' is an ObjCObjectType with base C and protocol list [P]. 4181/// 4182/// 'id' is a TypedefType which is sugar for an ObjCPointerType whose 4183/// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType 4184/// and no protocols. 4185/// 4186/// 'id<P>' is an ObjCPointerType whose pointee is an ObjCObjecType 4187/// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually 4188/// this should get its own sugar class to better represent the source. 4189class ObjCObjectType : public Type { 4190 // ObjCObjectType.NumProtocols - the number of protocols stored 4191 // after the ObjCObjectPointerType node. 4192 // 4193 // These protocols are those written directly on the type. If 4194 // protocol qualifiers ever become additive, the iterators will need 4195 // to get kindof complicated. 4196 // 4197 // In the canonical object type, these are sorted alphabetically 4198 // and uniqued. 4199 4200 /// Either a BuiltinType or an InterfaceType or sugar for either. 4201 QualType BaseType; 4202 4203 ObjCProtocolDecl * const *getProtocolStorage() const { 4204 return const_cast<ObjCObjectType*>(this)->getProtocolStorage(); 4205 } 4206 4207 ObjCProtocolDecl **getProtocolStorage(); 4208 4209protected: 4210 ObjCObjectType(QualType Canonical, QualType Base, 4211 ObjCProtocolDecl * const *Protocols, unsigned NumProtocols); 4212 4213 enum Nonce_ObjCInterface { Nonce_ObjCInterface }; 4214 ObjCObjectType(enum Nonce_ObjCInterface) 4215 : Type(ObjCInterface, QualType(), false, false, false, false), 4216 BaseType(QualType(this_(), 0)) { 4217 ObjCObjectTypeBits.NumProtocols = 0; 4218 } 4219 4220public: 4221 /// getBaseType - Gets the base type of this object type. This is 4222 /// always (possibly sugar for) one of: 4223 /// - the 'id' builtin type (as opposed to the 'id' type visible to the 4224 /// user, which is a typedef for an ObjCPointerType) 4225 /// - the 'Class' builtin type (same caveat) 4226 /// - an ObjCObjectType (currently always an ObjCInterfaceType) 4227 QualType getBaseType() const { return BaseType; } 4228 4229 bool isObjCId() const { 4230 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); 4231 } 4232 bool isObjCClass() const { 4233 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); 4234 } 4235 bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } 4236 bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } 4237 bool isObjCUnqualifiedIdOrClass() const { 4238 if (!qual_empty()) return false; 4239 if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) 4240 return T->getKind() == BuiltinType::ObjCId || 4241 T->getKind() == BuiltinType::ObjCClass; 4242 return false; 4243 } 4244 bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } 4245 bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } 4246 4247 /// Gets the interface declaration for this object type, if the base type 4248 /// really is an interface. 4249 ObjCInterfaceDecl *getInterface() const; 4250 4251 typedef ObjCProtocolDecl * const *qual_iterator; 4252 4253 qual_iterator qual_begin() const { return getProtocolStorage(); } 4254 qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } 4255 4256 bool qual_empty() const { return getNumProtocols() == 0; } 4257 4258 /// getNumProtocols - Return the number of qualifying protocols in this 4259 /// interface type, or 0 if there are none. 4260 unsigned getNumProtocols() const { return ObjCObjectTypeBits.NumProtocols; } 4261 4262 /// \brief Fetch a protocol by index. 4263 ObjCProtocolDecl *getProtocol(unsigned I) const { 4264 assert(I < getNumProtocols() && "Out-of-range protocol access"); 4265 return qual_begin()[I]; 4266 } 4267 4268 bool isSugared() const { return false; } 4269 QualType desugar() const { return QualType(this, 0); } 4270 4271 static bool classof(const Type *T) { 4272 return T->getTypeClass() == ObjCObject || 4273 T->getTypeClass() == ObjCInterface; 4274 } 4275}; 4276 4277/// ObjCObjectTypeImpl - A class providing a concrete implementation 4278/// of ObjCObjectType, so as to not increase the footprint of 4279/// ObjCInterfaceType. Code outside of ASTContext and the core type 4280/// system should not reference this type. 4281class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { 4282 friend class ASTContext; 4283 4284 // If anyone adds fields here, ObjCObjectType::getProtocolStorage() 4285 // will need to be modified. 4286 4287 ObjCObjectTypeImpl(QualType Canonical, QualType Base, 4288 ObjCProtocolDecl * const *Protocols, 4289 unsigned NumProtocols) 4290 : ObjCObjectType(Canonical, Base, Protocols, NumProtocols) {} 4291 4292public: 4293 void Profile(llvm::FoldingSetNodeID &ID); 4294 static void Profile(llvm::FoldingSetNodeID &ID, 4295 QualType Base, 4296 ObjCProtocolDecl *const *protocols, 4297 unsigned NumProtocols); 4298}; 4299 4300inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorage() { 4301 return reinterpret_cast<ObjCProtocolDecl**>( 4302 static_cast<ObjCObjectTypeImpl*>(this) + 1); 4303} 4304 4305/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 4306/// object oriented design. They basically correspond to C++ classes. There 4307/// are two kinds of interface types, normal interfaces like "NSString" and 4308/// qualified interfaces, which are qualified with a protocol list like 4309/// "NSString<NSCopyable, NSAmazing>". 4310/// 4311/// ObjCInterfaceType guarantees the following properties when considered 4312/// as a subtype of its superclass, ObjCObjectType: 4313/// - There are no protocol qualifiers. To reinforce this, code which 4314/// tries to invoke the protocol methods via an ObjCInterfaceType will 4315/// fail to compile. 4316/// - It is its own base type. That is, if T is an ObjCInterfaceType*, 4317/// T->getBaseType() == QualType(T, 0). 4318class ObjCInterfaceType : public ObjCObjectType { 4319 mutable ObjCInterfaceDecl *Decl; 4320 4321 ObjCInterfaceType(const ObjCInterfaceDecl *D) 4322 : ObjCObjectType(Nonce_ObjCInterface), 4323 Decl(const_cast<ObjCInterfaceDecl*>(D)) {} 4324 friend class ASTContext; // ASTContext creates these. 4325 friend class ASTReader; 4326 friend class ObjCInterfaceDecl; 4327 4328public: 4329 /// getDecl - Get the declaration of this interface. 4330 ObjCInterfaceDecl *getDecl() const { return Decl; } 4331 4332 bool isSugared() const { return false; } 4333 QualType desugar() const { return QualType(this, 0); } 4334 4335 static bool classof(const Type *T) { 4336 return T->getTypeClass() == ObjCInterface; 4337 } 4338 4339 // Nonsense to "hide" certain members of ObjCObjectType within this 4340 // class. People asking for protocols on an ObjCInterfaceType are 4341 // not going to get what they want: ObjCInterfaceTypes are 4342 // guaranteed to have no protocols. 4343 enum { 4344 qual_iterator, 4345 qual_begin, 4346 qual_end, 4347 getNumProtocols, 4348 getProtocol 4349 }; 4350}; 4351 4352inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { 4353 if (const ObjCInterfaceType *T = 4354 getBaseType()->getAs<ObjCInterfaceType>()) 4355 return T->getDecl(); 4356 return 0; 4357} 4358 4359/// ObjCObjectPointerType - Used to represent a pointer to an 4360/// Objective C object. These are constructed from pointer 4361/// declarators when the pointee type is an ObjCObjectType (or sugar 4362/// for one). In addition, the 'id' and 'Class' types are typedefs 4363/// for these, and the protocol-qualified types 'id<P>' and 'Class<P>' 4364/// are translated into these. 4365/// 4366/// Pointers to pointers to Objective C objects are still PointerTypes; 4367/// only the first level of pointer gets it own type implementation. 4368class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 4369 QualType PointeeType; 4370 4371 ObjCObjectPointerType(QualType Canonical, QualType Pointee) 4372 : Type(ObjCObjectPointer, Canonical, false, false, false, false), 4373 PointeeType(Pointee) {} 4374 friend class ASTContext; // ASTContext creates these. 4375 4376public: 4377 /// getPointeeType - Gets the type pointed to by this ObjC pointer. 4378 /// The result will always be an ObjCObjectType or sugar thereof. 4379 QualType getPointeeType() const { return PointeeType; } 4380 4381 /// getObjCObjectType - Gets the type pointed to by this ObjC 4382 /// pointer. This method always returns non-null. 4383 /// 4384 /// This method is equivalent to getPointeeType() except that 4385 /// it discards any typedefs (or other sugar) between this 4386 /// type and the "outermost" object type. So for: 4387 /// \code 4388 /// \@class A; \@protocol P; \@protocol Q; 4389 /// typedef A<P> AP; 4390 /// typedef A A1; 4391 /// typedef A1<P> A1P; 4392 /// typedef A1P<Q> A1PQ; 4393 /// \endcode 4394 /// For 'A*', getObjectType() will return 'A'. 4395 /// For 'A<P>*', getObjectType() will return 'A<P>'. 4396 /// For 'AP*', getObjectType() will return 'A<P>'. 4397 /// For 'A1*', getObjectType() will return 'A'. 4398 /// For 'A1<P>*', getObjectType() will return 'A1<P>'. 4399 /// For 'A1P*', getObjectType() will return 'A1<P>'. 4400 /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because 4401 /// adding protocols to a protocol-qualified base discards the 4402 /// old qualifiers (for now). But if it didn't, getObjectType() 4403 /// would return 'A1P<Q>' (and we'd have to make iterating over 4404 /// qualifiers more complicated). 4405 const ObjCObjectType *getObjectType() const { 4406 return PointeeType->castAs<ObjCObjectType>(); 4407 } 4408 4409 /// getInterfaceType - If this pointer points to an Objective C 4410 /// \@interface type, gets the type for that interface. Any protocol 4411 /// qualifiers on the interface are ignored. 4412 /// 4413 /// \return null if the base type for this pointer is 'id' or 'Class' 4414 const ObjCInterfaceType *getInterfaceType() const { 4415 return getObjectType()->getBaseType()->getAs<ObjCInterfaceType>(); 4416 } 4417 4418 /// getInterfaceDecl - If this pointer points to an Objective \@interface 4419 /// type, gets the declaration for that interface. 4420 /// 4421 /// \return null if the base type for this pointer is 'id' or 'Class' 4422 ObjCInterfaceDecl *getInterfaceDecl() const { 4423 return getObjectType()->getInterface(); 4424 } 4425 4426 /// isObjCIdType - True if this is equivalent to the 'id' type, i.e. if 4427 /// its object type is the primitive 'id' type with no protocols. 4428 bool isObjCIdType() const { 4429 return getObjectType()->isObjCUnqualifiedId(); 4430 } 4431 4432 /// isObjCClassType - True if this is equivalent to the 'Class' type, 4433 /// i.e. if its object tive is the primitive 'Class' type with no protocols. 4434 bool isObjCClassType() const { 4435 return getObjectType()->isObjCUnqualifiedClass(); 4436 } 4437 4438 /// isObjCQualifiedIdType - True if this is equivalent to 'id<P>' for some 4439 /// non-empty set of protocols. 4440 bool isObjCQualifiedIdType() const { 4441 return getObjectType()->isObjCQualifiedId(); 4442 } 4443 4444 /// isObjCQualifiedClassType - True if this is equivalent to 'Class<P>' for 4445 /// some non-empty set of protocols. 4446 bool isObjCQualifiedClassType() const { 4447 return getObjectType()->isObjCQualifiedClass(); 4448 } 4449 4450 /// An iterator over the qualifiers on the object type. Provided 4451 /// for convenience. This will always iterate over the full set of 4452 /// protocols on a type, not just those provided directly. 4453 typedef ObjCObjectType::qual_iterator qual_iterator; 4454 4455 qual_iterator qual_begin() const { 4456 return getObjectType()->qual_begin(); 4457 } 4458 qual_iterator qual_end() const { 4459 return getObjectType()->qual_end(); 4460 } 4461 bool qual_empty() const { return getObjectType()->qual_empty(); } 4462 4463 /// getNumProtocols - Return the number of qualifying protocols on 4464 /// the object type. 4465 unsigned getNumProtocols() const { 4466 return getObjectType()->getNumProtocols(); 4467 } 4468 4469 /// \brief Retrieve a qualifying protocol by index on the object 4470 /// type. 4471 ObjCProtocolDecl *getProtocol(unsigned I) const { 4472 return getObjectType()->getProtocol(I); 4473 } 4474 4475 bool isSugared() const { return false; } 4476 QualType desugar() const { return QualType(this, 0); } 4477 4478 void Profile(llvm::FoldingSetNodeID &ID) { 4479 Profile(ID, getPointeeType()); 4480 } 4481 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 4482 ID.AddPointer(T.getAsOpaquePtr()); 4483 } 4484 static bool classof(const Type *T) { 4485 return T->getTypeClass() == ObjCObjectPointer; 4486 } 4487}; 4488 4489class AtomicType : public Type, public llvm::FoldingSetNode { 4490 QualType ValueType; 4491 4492 AtomicType(QualType ValTy, QualType Canonical) 4493 : Type(Atomic, Canonical, ValTy->isDependentType(), 4494 ValTy->isInstantiationDependentType(), 4495 ValTy->isVariablyModifiedType(), 4496 ValTy->containsUnexpandedParameterPack()), 4497 ValueType(ValTy) {} 4498 friend class ASTContext; // ASTContext creates these. 4499 4500 public: 4501 /// getValueType - Gets the type contained by this atomic type, i.e. 4502 /// the type returned by performing an atomic load of this atomic type. 4503 QualType getValueType() const { return ValueType; } 4504 4505 bool isSugared() const { return false; } 4506 QualType desugar() const { return QualType(this, 0); } 4507 4508 void Profile(llvm::FoldingSetNodeID &ID) { 4509 Profile(ID, getValueType()); 4510 } 4511 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 4512 ID.AddPointer(T.getAsOpaquePtr()); 4513 } 4514 static bool classof(const Type *T) { 4515 return T->getTypeClass() == Atomic; 4516 } 4517}; 4518 4519/// A qualifier set is used to build a set of qualifiers. 4520class QualifierCollector : public Qualifiers { 4521public: 4522 QualifierCollector(Qualifiers Qs = Qualifiers()) : Qualifiers(Qs) {} 4523 4524 /// Collect any qualifiers on the given type and return an 4525 /// unqualified type. The qualifiers are assumed to be consistent 4526 /// with those already in the type. 4527 const Type *strip(QualType type) { 4528 addFastQualifiers(type.getLocalFastQualifiers()); 4529 if (!type.hasLocalNonFastQualifiers()) 4530 return type.getTypePtrUnsafe(); 4531 4532 const ExtQuals *extQuals = type.getExtQualsUnsafe(); 4533 addConsistentQualifiers(extQuals->getQualifiers()); 4534 return extQuals->getBaseType(); 4535 } 4536 4537 /// Apply the collected qualifiers to the given type. 4538 QualType apply(const ASTContext &Context, QualType QT) const; 4539 4540 /// Apply the collected qualifiers to the given type. 4541 QualType apply(const ASTContext &Context, const Type* T) const; 4542}; 4543 4544 4545// Inline function definitions. 4546 4547inline SplitQualType SplitQualType::getSingleStepDesugaredType() const { 4548 SplitQualType desugar = 4549 Ty->getLocallyUnqualifiedSingleStepDesugaredType().split(); 4550 desugar.Quals.addConsistentQualifiers(Quals); 4551 return desugar; 4552} 4553 4554inline const Type *QualType::getTypePtr() const { 4555 return getCommonPtr()->BaseType; 4556} 4557 4558inline const Type *QualType::getTypePtrOrNull() const { 4559 return (isNull() ? 0 : getCommonPtr()->BaseType); 4560} 4561 4562inline SplitQualType QualType::split() const { 4563 if (!hasLocalNonFastQualifiers()) 4564 return SplitQualType(getTypePtrUnsafe(), 4565 Qualifiers::fromFastMask(getLocalFastQualifiers())); 4566 4567 const ExtQuals *eq = getExtQualsUnsafe(); 4568 Qualifiers qs = eq->getQualifiers(); 4569 qs.addFastQualifiers(getLocalFastQualifiers()); 4570 return SplitQualType(eq->getBaseType(), qs); 4571} 4572 4573inline Qualifiers QualType::getLocalQualifiers() const { 4574 Qualifiers Quals; 4575 if (hasLocalNonFastQualifiers()) 4576 Quals = getExtQualsUnsafe()->getQualifiers(); 4577 Quals.addFastQualifiers(getLocalFastQualifiers()); 4578 return Quals; 4579} 4580 4581inline Qualifiers QualType::getQualifiers() const { 4582 Qualifiers quals = getCommonPtr()->CanonicalType.getLocalQualifiers(); 4583 quals.addFastQualifiers(getLocalFastQualifiers()); 4584 return quals; 4585} 4586 4587inline unsigned QualType::getCVRQualifiers() const { 4588 unsigned cvr = getCommonPtr()->CanonicalType.getLocalCVRQualifiers(); 4589 cvr |= getLocalCVRQualifiers(); 4590 return cvr; 4591} 4592 4593inline QualType QualType::getCanonicalType() const { 4594 QualType canon = getCommonPtr()->CanonicalType; 4595 return canon.withFastQualifiers(getLocalFastQualifiers()); 4596} 4597 4598inline bool QualType::isCanonical() const { 4599 return getTypePtr()->isCanonicalUnqualified(); 4600} 4601 4602inline bool QualType::isCanonicalAsParam() const { 4603 if (!isCanonical()) return false; 4604 if (hasLocalQualifiers()) return false; 4605 4606 const Type *T = getTypePtr(); 4607 if (T->isVariablyModifiedType() && T->hasSizedVLAType()) 4608 return false; 4609 4610 return !isa<FunctionType>(T) && !isa<ArrayType>(T); 4611} 4612 4613inline bool QualType::isConstQualified() const { 4614 return isLocalConstQualified() || 4615 getCommonPtr()->CanonicalType.isLocalConstQualified(); 4616} 4617 4618inline bool QualType::isRestrictQualified() const { 4619 return isLocalRestrictQualified() || 4620 getCommonPtr()->CanonicalType.isLocalRestrictQualified(); 4621} 4622 4623 4624inline bool QualType::isVolatileQualified() const { 4625 return isLocalVolatileQualified() || 4626 getCommonPtr()->CanonicalType.isLocalVolatileQualified(); 4627} 4628 4629inline bool QualType::hasQualifiers() const { 4630 return hasLocalQualifiers() || 4631 getCommonPtr()->CanonicalType.hasLocalQualifiers(); 4632} 4633 4634inline QualType QualType::getUnqualifiedType() const { 4635 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4636 return QualType(getTypePtr(), 0); 4637 4638 return QualType(getSplitUnqualifiedTypeImpl(*this).Ty, 0); 4639} 4640 4641inline SplitQualType QualType::getSplitUnqualifiedType() const { 4642 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4643 return split(); 4644 4645 return getSplitUnqualifiedTypeImpl(*this); 4646} 4647 4648inline void QualType::removeLocalConst() { 4649 removeLocalFastQualifiers(Qualifiers::Const); 4650} 4651 4652inline void QualType::removeLocalRestrict() { 4653 removeLocalFastQualifiers(Qualifiers::Restrict); 4654} 4655 4656inline void QualType::removeLocalVolatile() { 4657 removeLocalFastQualifiers(Qualifiers::Volatile); 4658} 4659 4660inline void QualType::removeLocalCVRQualifiers(unsigned Mask) { 4661 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 4662 assert((int)Qualifiers::CVRMask == (int)Qualifiers::FastMask); 4663 4664 // Fast path: we don't need to touch the slow qualifiers. 4665 removeLocalFastQualifiers(Mask); 4666} 4667 4668/// getAddressSpace - Return the address space of this type. 4669inline unsigned QualType::getAddressSpace() const { 4670 return getQualifiers().getAddressSpace(); 4671} 4672 4673/// getObjCGCAttr - Return the gc attribute of this type. 4674inline Qualifiers::GC QualType::getObjCGCAttr() const { 4675 return getQualifiers().getObjCGCAttr(); 4676} 4677 4678inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { 4679 if (const PointerType *PT = t.getAs<PointerType>()) { 4680 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 4681 return FT->getExtInfo(); 4682 } else if (const FunctionType *FT = t.getAs<FunctionType>()) 4683 return FT->getExtInfo(); 4684 4685 return FunctionType::ExtInfo(); 4686} 4687 4688inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { 4689 return getFunctionExtInfo(*t); 4690} 4691 4692/// isMoreQualifiedThan - Determine whether this type is more 4693/// qualified than the Other type. For example, "const volatile int" 4694/// is more qualified than "const int", "volatile int", and 4695/// "int". However, it is not more qualified than "const volatile 4696/// int". 4697inline bool QualType::isMoreQualifiedThan(QualType other) const { 4698 Qualifiers myQuals = getQualifiers(); 4699 Qualifiers otherQuals = other.getQualifiers(); 4700 return (myQuals != otherQuals && myQuals.compatiblyIncludes(otherQuals)); 4701} 4702 4703/// isAtLeastAsQualifiedAs - Determine whether this type is at last 4704/// as qualified as the Other type. For example, "const volatile 4705/// int" is at least as qualified as "const int", "volatile int", 4706/// "int", and "const volatile int". 4707inline bool QualType::isAtLeastAsQualifiedAs(QualType other) const { 4708 return getQualifiers().compatiblyIncludes(other.getQualifiers()); 4709} 4710 4711/// getNonReferenceType - If Type is a reference type (e.g., const 4712/// int&), returns the type that the reference refers to ("const 4713/// int"). Otherwise, returns the type itself. This routine is used 4714/// throughout Sema to implement C++ 5p6: 4715/// 4716/// If an expression initially has the type "reference to T" (8.3.2, 4717/// 8.5.3), the type is adjusted to "T" prior to any further 4718/// analysis, the expression designates the object or function 4719/// denoted by the reference, and the expression is an lvalue. 4720inline QualType QualType::getNonReferenceType() const { 4721 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 4722 return RefType->getPointeeType(); 4723 else 4724 return *this; 4725} 4726 4727inline bool QualType::isCForbiddenLValueType() const { 4728 return ((getTypePtr()->isVoidType() && !hasQualifiers()) || 4729 getTypePtr()->isFunctionType()); 4730} 4731 4732/// \brief Tests whether the type is categorized as a fundamental type. 4733/// 4734/// \returns True for types specified in C++0x [basic.fundamental]. 4735inline bool Type::isFundamentalType() const { 4736 return isVoidType() || 4737 // FIXME: It's really annoying that we don't have an 4738 // 'isArithmeticType()' which agrees with the standard definition. 4739 (isArithmeticType() && !isEnumeralType()); 4740} 4741 4742/// \brief Tests whether the type is categorized as a compound type. 4743/// 4744/// \returns True for types specified in C++0x [basic.compound]. 4745inline bool Type::isCompoundType() const { 4746 // C++0x [basic.compound]p1: 4747 // Compound types can be constructed in the following ways: 4748 // -- arrays of objects of a given type [...]; 4749 return isArrayType() || 4750 // -- functions, which have parameters of given types [...]; 4751 isFunctionType() || 4752 // -- pointers to void or objects or functions [...]; 4753 isPointerType() || 4754 // -- references to objects or functions of a given type. [...] 4755 isReferenceType() || 4756 // -- classes containing a sequence of objects of various types, [...]; 4757 isRecordType() || 4758 // -- unions, which are classes capable of containing objects of different 4759 // types at different times; 4760 isUnionType() || 4761 // -- enumerations, which comprise a set of named constant values. [...]; 4762 isEnumeralType() || 4763 // -- pointers to non-static class members, [...]. 4764 isMemberPointerType(); 4765} 4766 4767inline bool Type::isFunctionType() const { 4768 return isa<FunctionType>(CanonicalType); 4769} 4770inline bool Type::isPointerType() const { 4771 return isa<PointerType>(CanonicalType); 4772} 4773inline bool Type::isAnyPointerType() const { 4774 return isPointerType() || isObjCObjectPointerType(); 4775} 4776inline bool Type::isBlockPointerType() const { 4777 return isa<BlockPointerType>(CanonicalType); 4778} 4779inline bool Type::isReferenceType() const { 4780 return isa<ReferenceType>(CanonicalType); 4781} 4782inline bool Type::isLValueReferenceType() const { 4783 return isa<LValueReferenceType>(CanonicalType); 4784} 4785inline bool Type::isRValueReferenceType() const { 4786 return isa<RValueReferenceType>(CanonicalType); 4787} 4788inline bool Type::isFunctionPointerType() const { 4789 if (const PointerType *T = getAs<PointerType>()) 4790 return T->getPointeeType()->isFunctionType(); 4791 else 4792 return false; 4793} 4794inline bool Type::isMemberPointerType() const { 4795 return isa<MemberPointerType>(CanonicalType); 4796} 4797inline bool Type::isMemberFunctionPointerType() const { 4798 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4799 return T->isMemberFunctionPointer(); 4800 else 4801 return false; 4802} 4803inline bool Type::isMemberDataPointerType() const { 4804 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4805 return T->isMemberDataPointer(); 4806 else 4807 return false; 4808} 4809inline bool Type::isArrayType() const { 4810 return isa<ArrayType>(CanonicalType); 4811} 4812inline bool Type::isConstantArrayType() const { 4813 return isa<ConstantArrayType>(CanonicalType); 4814} 4815inline bool Type::isIncompleteArrayType() const { 4816 return isa<IncompleteArrayType>(CanonicalType); 4817} 4818inline bool Type::isVariableArrayType() const { 4819 return isa<VariableArrayType>(CanonicalType); 4820} 4821inline bool Type::isDependentSizedArrayType() const { 4822 return isa<DependentSizedArrayType>(CanonicalType); 4823} 4824inline bool Type::isBuiltinType() const { 4825 return isa<BuiltinType>(CanonicalType); 4826} 4827inline bool Type::isRecordType() const { 4828 return isa<RecordType>(CanonicalType); 4829} 4830inline bool Type::isEnumeralType() const { 4831 return isa<EnumType>(CanonicalType); 4832} 4833inline bool Type::isAnyComplexType() const { 4834 return isa<ComplexType>(CanonicalType); 4835} 4836inline bool Type::isVectorType() const { 4837 return isa<VectorType>(CanonicalType); 4838} 4839inline bool Type::isExtVectorType() const { 4840 return isa<ExtVectorType>(CanonicalType); 4841} 4842inline bool Type::isObjCObjectPointerType() const { 4843 return isa<ObjCObjectPointerType>(CanonicalType); 4844} 4845inline bool Type::isObjCObjectType() const { 4846 return isa<ObjCObjectType>(CanonicalType); 4847} 4848inline bool Type::isObjCObjectOrInterfaceType() const { 4849 return isa<ObjCInterfaceType>(CanonicalType) || 4850 isa<ObjCObjectType>(CanonicalType); 4851} 4852inline bool Type::isAtomicType() const { 4853 return isa<AtomicType>(CanonicalType); 4854} 4855 4856inline bool Type::isObjCQualifiedIdType() const { 4857 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4858 return OPT->isObjCQualifiedIdType(); 4859 return false; 4860} 4861inline bool Type::isObjCQualifiedClassType() const { 4862 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4863 return OPT->isObjCQualifiedClassType(); 4864 return false; 4865} 4866inline bool Type::isObjCIdType() const { 4867 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4868 return OPT->isObjCIdType(); 4869 return false; 4870} 4871inline bool Type::isObjCClassType() const { 4872 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4873 return OPT->isObjCClassType(); 4874 return false; 4875} 4876inline bool Type::isObjCSelType() const { 4877 if (const PointerType *OPT = getAs<PointerType>()) 4878 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 4879 return false; 4880} 4881inline bool Type::isObjCBuiltinType() const { 4882 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 4883} 4884 4885inline bool Type::isImage1dT() const { 4886 return isSpecificBuiltinType(BuiltinType::OCLImage1d); 4887} 4888 4889inline bool Type::isImage1dArrayT() const { 4890 return isSpecificBuiltinType(BuiltinType::OCLImage1dArray); 4891} 4892 4893inline bool Type::isImage1dBufferT() const { 4894 return isSpecificBuiltinType(BuiltinType::OCLImage1dBuffer); 4895} 4896 4897inline bool Type::isImage2dT() const { 4898 return isSpecificBuiltinType(BuiltinType::OCLImage2d); 4899} 4900 4901inline bool Type::isImage2dArrayT() const { 4902 return isSpecificBuiltinType(BuiltinType::OCLImage2dArray); 4903} 4904 4905inline bool Type::isImage3dT() const { 4906 return isSpecificBuiltinType(BuiltinType::OCLImage3d); 4907} 4908 4909inline bool Type::isSamplerT() const { 4910 return isSpecificBuiltinType(BuiltinType::OCLSampler); 4911} 4912 4913inline bool Type::isEventT() const { 4914 return isSpecificBuiltinType(BuiltinType::OCLEvent); 4915} 4916 4917inline bool Type::isImageType() const { 4918 return isImage3dT() || 4919 isImage2dT() || isImage2dArrayT() || 4920 isImage1dT() || isImage1dArrayT() || isImage1dBufferT(); 4921} 4922 4923inline bool Type::isOpenCLSpecificType() const { 4924 return isSamplerT() || isEventT() || isImageType(); 4925} 4926 4927inline bool Type::isTemplateTypeParmType() const { 4928 return isa<TemplateTypeParmType>(CanonicalType); 4929} 4930 4931inline bool Type::isSpecificBuiltinType(unsigned K) const { 4932 if (const BuiltinType *BT = getAs<BuiltinType>()) 4933 if (BT->getKind() == (BuiltinType::Kind) K) 4934 return true; 4935 return false; 4936} 4937 4938inline bool Type::isPlaceholderType() const { 4939 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4940 return BT->isPlaceholderType(); 4941 return false; 4942} 4943 4944inline const BuiltinType *Type::getAsPlaceholderType() const { 4945 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4946 if (BT->isPlaceholderType()) 4947 return BT; 4948 return 0; 4949} 4950 4951inline bool Type::isSpecificPlaceholderType(unsigned K) const { 4952 assert(BuiltinType::isPlaceholderTypeKind((BuiltinType::Kind) K)); 4953 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4954 return (BT->getKind() == (BuiltinType::Kind) K); 4955 return false; 4956} 4957 4958inline bool Type::isNonOverloadPlaceholderType() const { 4959 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4960 return BT->isNonOverloadPlaceholderType(); 4961 return false; 4962} 4963 4964inline bool Type::isVoidType() const { 4965 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 4966 return BT->getKind() == BuiltinType::Void; 4967 return false; 4968} 4969 4970inline bool Type::isHalfType() const { 4971 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 4972 return BT->getKind() == BuiltinType::Half; 4973 // FIXME: Should we allow complex __fp16? Probably not. 4974 return false; 4975} 4976 4977inline bool Type::isNullPtrType() const { 4978 if (const BuiltinType *BT = getAs<BuiltinType>()) 4979 return BT->getKind() == BuiltinType::NullPtr; 4980 return false; 4981} 4982 4983extern bool IsEnumDeclComplete(EnumDecl *); 4984extern bool IsEnumDeclScoped(EnumDecl *); 4985 4986inline bool Type::isIntegerType() const { 4987 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 4988 return BT->getKind() >= BuiltinType::Bool && 4989 BT->getKind() <= BuiltinType::Int128; 4990 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) { 4991 // Incomplete enum types are not treated as integer types. 4992 // FIXME: In C++, enum types are never integer types. 4993 return IsEnumDeclComplete(ET->getDecl()) && 4994 !IsEnumDeclScoped(ET->getDecl()); 4995 } 4996 return false; 4997} 4998 4999inline bool Type::isScalarType() const { 5000 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 5001 return BT->getKind() > BuiltinType::Void && 5002 BT->getKind() <= BuiltinType::NullPtr; 5003 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) 5004 // Enums are scalar types, but only if they are defined. Incomplete enums 5005 // are not treated as scalar types. 5006 return IsEnumDeclComplete(ET->getDecl()); 5007 return isa<PointerType>(CanonicalType) || 5008 isa<BlockPointerType>(CanonicalType) || 5009 isa<MemberPointerType>(CanonicalType) || 5010 isa<ComplexType>(CanonicalType) || 5011 isa<ObjCObjectPointerType>(CanonicalType); 5012} 5013 5014inline bool Type::isIntegralOrEnumerationType() const { 5015 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 5016 return BT->getKind() >= BuiltinType::Bool && 5017 BT->getKind() <= BuiltinType::Int128; 5018 5019 // Check for a complete enum type; incomplete enum types are not properly an 5020 // enumeration type in the sense required here. 5021 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) 5022 return IsEnumDeclComplete(ET->getDecl()); 5023 5024 return false; 5025} 5026 5027inline bool Type::isBooleanType() const { 5028 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 5029 return BT->getKind() == BuiltinType::Bool; 5030 return false; 5031} 5032 5033/// \brief Determines whether this is a type for which one can define 5034/// an overloaded operator. 5035inline bool Type::isOverloadableType() const { 5036 return isDependentType() || isRecordType() || isEnumeralType(); 5037} 5038 5039/// \brief Determines whether this type can decay to a pointer type. 5040inline bool Type::canDecayToPointerType() const { 5041 return isFunctionType() || isArrayType(); 5042} 5043 5044inline bool Type::hasPointerRepresentation() const { 5045 return (isPointerType() || isReferenceType() || isBlockPointerType() || 5046 isObjCObjectPointerType() || isNullPtrType()); 5047} 5048 5049inline bool Type::hasObjCPointerRepresentation() const { 5050 return isObjCObjectPointerType(); 5051} 5052 5053inline const Type *Type::getBaseElementTypeUnsafe() const { 5054 const Type *type = this; 5055 while (const ArrayType *arrayType = type->getAsArrayTypeUnsafe()) 5056 type = arrayType->getElementType().getTypePtr(); 5057 return type; 5058} 5059 5060/// Insertion operator for diagnostics. This allows sending QualType's into a 5061/// diagnostic with <<. 5062inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 5063 QualType T) { 5064 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 5065 DiagnosticsEngine::ak_qualtype); 5066 return DB; 5067} 5068 5069/// Insertion operator for partial diagnostics. This allows sending QualType's 5070/// into a diagnostic with <<. 5071inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, 5072 QualType T) { 5073 PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 5074 DiagnosticsEngine::ak_qualtype); 5075 return PD; 5076} 5077 5078// Helper class template that is used by Type::getAs to ensure that one does 5079// not try to look through a qualified type to get to an array type. 5080template<typename T, 5081 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 5082 llvm::is_base_of<ArrayType, T>::value)> 5083struct ArrayType_cannot_be_used_with_getAs { }; 5084 5085template<typename T> 5086struct ArrayType_cannot_be_used_with_getAs<T, true>; 5087 5088// Member-template getAs<specific type>'. 5089template <typename T> const T *Type::getAs() const { 5090 ArrayType_cannot_be_used_with_getAs<T> at; 5091 (void)at; 5092 5093 // If this is directly a T type, return it. 5094 if (const T *Ty = dyn_cast<T>(this)) 5095 return Ty; 5096 5097 // If the canonical form of this type isn't the right kind, reject it. 5098 if (!isa<T>(CanonicalType)) 5099 return 0; 5100 5101 // If this is a typedef for the type, strip the typedef off without 5102 // losing all typedef information. 5103 return cast<T>(getUnqualifiedDesugaredType()); 5104} 5105 5106inline const ArrayType *Type::getAsArrayTypeUnsafe() const { 5107 // If this is directly an array type, return it. 5108 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) 5109 return arr; 5110 5111 // If the canonical form of this type isn't the right kind, reject it. 5112 if (!isa<ArrayType>(CanonicalType)) 5113 return 0; 5114 5115 // If this is a typedef for the type, strip the typedef off without 5116 // losing all typedef information. 5117 return cast<ArrayType>(getUnqualifiedDesugaredType()); 5118} 5119 5120template <typename T> const T *Type::castAs() const { 5121 ArrayType_cannot_be_used_with_getAs<T> at; 5122 (void) at; 5123 5124 assert(isa<T>(CanonicalType)); 5125 if (const T *ty = dyn_cast<T>(this)) return ty; 5126 return cast<T>(getUnqualifiedDesugaredType()); 5127} 5128 5129inline const ArrayType *Type::castAsArrayTypeUnsafe() const { 5130 assert(isa<ArrayType>(CanonicalType)); 5131 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) return arr; 5132 return cast<ArrayType>(getUnqualifiedDesugaredType()); 5133} 5134 5135} // end namespace clang 5136 5137#endif 5138