Type.h revision a2c3646c35dd09d21b74826240aa916545b1873f
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< ::clang::QualType> { 1002 typedef const ::clang::Type *SimpleType; 1003 static SimpleType getSimplifiedValue(::clang::QualType Val) { 1004 return Val.getTypePtr(); 1005 } 1006}; 1007 1008// Teach SmallPtrSet that QualType is "basically a pointer". 1009template<> 1010class PointerLikeTypeTraits<clang::QualType> { 1011public: 1012 static inline void *getAsVoidPointer(clang::QualType P) { 1013 return P.getAsOpaquePtr(); 1014 } 1015 static inline clang::QualType getFromVoidPointer(void *P) { 1016 return clang::QualType::getFromOpaquePtr(P); 1017 } 1018 // Various qualifiers go in low bits. 1019 enum { NumLowBitsAvailable = 0 }; 1020}; 1021 1022} // end namespace llvm 1023 1024namespace clang { 1025 1026/// \brief Base class that is common to both the \c ExtQuals and \c Type 1027/// classes, which allows \c QualType to access the common fields between the 1028/// two. 1029/// 1030class ExtQualsTypeCommonBase { 1031 ExtQualsTypeCommonBase(const Type *baseType, QualType canon) 1032 : BaseType(baseType), CanonicalType(canon) {} 1033 1034 /// \brief The "base" type of an extended qualifiers type (\c ExtQuals) or 1035 /// a self-referential pointer (for \c Type). 1036 /// 1037 /// This pointer allows an efficient mapping from a QualType to its 1038 /// underlying type pointer. 1039 const Type *const BaseType; 1040 1041 /// \brief The canonical type of this type. A QualType. 1042 QualType CanonicalType; 1043 1044 friend class QualType; 1045 friend class Type; 1046 friend class ExtQuals; 1047}; 1048 1049/// ExtQuals - We can encode up to four bits in the low bits of a 1050/// type pointer, but there are many more type qualifiers that we want 1051/// to be able to apply to an arbitrary type. Therefore we have this 1052/// struct, intended to be heap-allocated and used by QualType to 1053/// store qualifiers. 1054/// 1055/// The current design tags the 'const', 'restrict', and 'volatile' qualifiers 1056/// in three low bits on the QualType pointer; a fourth bit records whether 1057/// the pointer is an ExtQuals node. The extended qualifiers (address spaces, 1058/// Objective-C GC attributes) are much more rare. 1059class ExtQuals : public ExtQualsTypeCommonBase, public llvm::FoldingSetNode { 1060 // NOTE: changing the fast qualifiers should be straightforward as 1061 // long as you don't make 'const' non-fast. 1062 // 1. Qualifiers: 1063 // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). 1064 // Fast qualifiers must occupy the low-order bits. 1065 // b) Update Qualifiers::FastWidth and FastMask. 1066 // 2. QualType: 1067 // a) Update is{Volatile,Restrict}Qualified(), defined inline. 1068 // b) Update remove{Volatile,Restrict}, defined near the end of 1069 // this header. 1070 // 3. ASTContext: 1071 // a) Update get{Volatile,Restrict}Type. 1072 1073 /// Quals - the immutable set of qualifiers applied by this 1074 /// node; always contains extended qualifiers. 1075 Qualifiers Quals; 1076 1077 ExtQuals *this_() { return this; } 1078 1079public: 1080 ExtQuals(const Type *baseType, QualType canon, Qualifiers quals) 1081 : ExtQualsTypeCommonBase(baseType, 1082 canon.isNull() ? QualType(this_(), 0) : canon), 1083 Quals(quals) 1084 { 1085 assert(Quals.hasNonFastQualifiers() 1086 && "ExtQuals created with no fast qualifiers"); 1087 assert(!Quals.hasFastQualifiers() 1088 && "ExtQuals created with fast qualifiers"); 1089 } 1090 1091 Qualifiers getQualifiers() const { return Quals; } 1092 1093 bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } 1094 Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } 1095 1096 bool hasObjCLifetime() const { return Quals.hasObjCLifetime(); } 1097 Qualifiers::ObjCLifetime getObjCLifetime() const { 1098 return Quals.getObjCLifetime(); 1099 } 1100 1101 bool hasAddressSpace() const { return Quals.hasAddressSpace(); } 1102 unsigned getAddressSpace() const { return Quals.getAddressSpace(); } 1103 1104 const Type *getBaseType() const { return BaseType; } 1105 1106public: 1107 void Profile(llvm::FoldingSetNodeID &ID) const { 1108 Profile(ID, getBaseType(), Quals); 1109 } 1110 static void Profile(llvm::FoldingSetNodeID &ID, 1111 const Type *BaseType, 1112 Qualifiers Quals) { 1113 assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!"); 1114 ID.AddPointer(BaseType); 1115 Quals.Profile(ID); 1116 } 1117}; 1118 1119/// \brief The kind of C++0x ref-qualifier associated with a function type, 1120/// which determines whether a member function's "this" object can be an 1121/// lvalue, rvalue, or neither. 1122enum RefQualifierKind { 1123 /// \brief No ref-qualifier was provided. 1124 RQ_None = 0, 1125 /// \brief An lvalue ref-qualifier was provided (\c &). 1126 RQ_LValue, 1127 /// \brief An rvalue ref-qualifier was provided (\c &&). 1128 RQ_RValue 1129}; 1130 1131/// Type - This is the base class of the type hierarchy. A central concept 1132/// with types is that each type always has a canonical type. A canonical type 1133/// is the type with any typedef names stripped out of it or the types it 1134/// references. For example, consider: 1135/// 1136/// typedef int foo; 1137/// typedef foo* bar; 1138/// 'int *' 'foo *' 'bar' 1139/// 1140/// There will be a Type object created for 'int'. Since int is canonical, its 1141/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 1142/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 1143/// there is a PointerType that represents 'int*', which, like 'int', is 1144/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 1145/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 1146/// is also 'int*'. 1147/// 1148/// Non-canonical types are useful for emitting diagnostics, without losing 1149/// information about typedefs being used. Canonical types are useful for type 1150/// comparisons (they allow by-pointer equality tests) and useful for reasoning 1151/// about whether something has a particular form (e.g. is a function type), 1152/// because they implicitly, recursively, strip all typedefs out of a type. 1153/// 1154/// Types, once created, are immutable. 1155/// 1156class Type : public ExtQualsTypeCommonBase { 1157public: 1158 enum TypeClass { 1159#define TYPE(Class, Base) Class, 1160#define LAST_TYPE(Class) TypeLast = Class, 1161#define ABSTRACT_TYPE(Class, Base) 1162#include "clang/AST/TypeNodes.def" 1163 TagFirst = Record, TagLast = Enum 1164 }; 1165 1166private: 1167 Type(const Type &) LLVM_DELETED_FUNCTION; 1168 void operator=(const Type &) LLVM_DELETED_FUNCTION; 1169 1170 /// Bitfields required by the Type class. 1171 class TypeBitfields { 1172 friend class Type; 1173 template <class T> friend class TypePropertyCache; 1174 1175 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 1176 unsigned TC : 8; 1177 1178 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 1179 unsigned Dependent : 1; 1180 1181 /// \brief Whether this type somehow involves a template parameter, even 1182 /// if the resolution of the type does not depend on a template parameter. 1183 unsigned InstantiationDependent : 1; 1184 1185 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 1186 unsigned VariablyModified : 1; 1187 1188 /// \brief Whether this type contains an unexpanded parameter pack 1189 /// (for C++0x variadic templates). 1190 unsigned ContainsUnexpandedParameterPack : 1; 1191 1192 /// \brief True if the cache (i.e. the bitfields here starting with 1193 /// 'Cache') is valid. 1194 mutable unsigned CacheValid : 1; 1195 1196 /// \brief Linkage of this type. 1197 mutable unsigned CachedLinkage : 2; 1198 1199 /// \brief Whether this type involves and local or unnamed types. 1200 mutable unsigned CachedLocalOrUnnamed : 1; 1201 1202 /// \brief FromAST - Whether this type comes from an AST file. 1203 mutable unsigned FromAST : 1; 1204 1205 bool isCacheValid() const { 1206 return CacheValid; 1207 } 1208 Linkage getLinkage() const { 1209 assert(isCacheValid() && "getting linkage from invalid cache"); 1210 return static_cast<Linkage>(CachedLinkage); 1211 } 1212 bool hasLocalOrUnnamedType() const { 1213 assert(isCacheValid() && "getting linkage from invalid cache"); 1214 return CachedLocalOrUnnamed; 1215 } 1216 }; 1217 enum { NumTypeBits = 19 }; 1218 1219protected: 1220 // These classes allow subclasses to somewhat cleanly pack bitfields 1221 // into Type. 1222 1223 class ArrayTypeBitfields { 1224 friend class ArrayType; 1225 1226 unsigned : NumTypeBits; 1227 1228 /// IndexTypeQuals - CVR qualifiers from declarations like 1229 /// 'int X[static restrict 4]'. For function parameters only. 1230 unsigned IndexTypeQuals : 3; 1231 1232 /// SizeModifier - storage class qualifiers from declarations like 1233 /// 'int X[static restrict 4]'. For function parameters only. 1234 /// Actually an ArrayType::ArraySizeModifier. 1235 unsigned SizeModifier : 3; 1236 }; 1237 1238 class BuiltinTypeBitfields { 1239 friend class BuiltinType; 1240 1241 unsigned : NumTypeBits; 1242 1243 /// The kind (BuiltinType::Kind) of builtin type this is. 1244 unsigned Kind : 8; 1245 }; 1246 1247 class FunctionTypeBitfields { 1248 friend class FunctionType; 1249 1250 unsigned : NumTypeBits; 1251 1252 /// Extra information which affects how the function is called, like 1253 /// regparm and the calling convention. 1254 unsigned ExtInfo : 9; 1255 1256 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1257 /// other bitfields. 1258 /// The qualifiers are part of FunctionProtoType because... 1259 /// 1260 /// C++ 8.3.5p4: The return type, the parameter type list and the 1261 /// cv-qualifier-seq, [...], are part of the function type. 1262 unsigned TypeQuals : 3; 1263 }; 1264 1265 class ObjCObjectTypeBitfields { 1266 friend class ObjCObjectType; 1267 1268 unsigned : NumTypeBits; 1269 1270 /// NumProtocols - The number of protocols stored directly on this 1271 /// object type. 1272 unsigned NumProtocols : 32 - NumTypeBits; 1273 }; 1274 1275 class ReferenceTypeBitfields { 1276 friend class ReferenceType; 1277 1278 unsigned : NumTypeBits; 1279 1280 /// True if the type was originally spelled with an lvalue sigil. 1281 /// This is never true of rvalue references but can also be false 1282 /// on lvalue references because of C++0x [dcl.typedef]p9, 1283 /// as follows: 1284 /// 1285 /// typedef int &ref; // lvalue, spelled lvalue 1286 /// typedef int &&rvref; // rvalue 1287 /// ref &a; // lvalue, inner ref, spelled lvalue 1288 /// ref &&a; // lvalue, inner ref 1289 /// rvref &a; // lvalue, inner ref, spelled lvalue 1290 /// rvref &&a; // rvalue, inner ref 1291 unsigned SpelledAsLValue : 1; 1292 1293 /// True if the inner type is a reference type. This only happens 1294 /// in non-canonical forms. 1295 unsigned InnerRef : 1; 1296 }; 1297 1298 class TypeWithKeywordBitfields { 1299 friend class TypeWithKeyword; 1300 1301 unsigned : NumTypeBits; 1302 1303 /// An ElaboratedTypeKeyword. 8 bits for efficient access. 1304 unsigned Keyword : 8; 1305 }; 1306 1307 class VectorTypeBitfields { 1308 friend class VectorType; 1309 1310 unsigned : NumTypeBits; 1311 1312 /// VecKind - The kind of vector, either a generic vector type or some 1313 /// target-specific vector type such as for AltiVec or Neon. 1314 unsigned VecKind : 3; 1315 1316 /// NumElements - The number of elements in the vector. 1317 unsigned NumElements : 29 - NumTypeBits; 1318 }; 1319 1320 class AttributedTypeBitfields { 1321 friend class AttributedType; 1322 1323 unsigned : NumTypeBits; 1324 1325 /// AttrKind - an AttributedType::Kind 1326 unsigned AttrKind : 32 - NumTypeBits; 1327 }; 1328 1329 class AutoTypeBitfields { 1330 friend class AutoType; 1331 1332 unsigned : NumTypeBits; 1333 1334 /// Was this placeholder type spelled as 'decltype(auto)'? 1335 unsigned IsDecltypeAuto : 1; 1336 }; 1337 1338 union { 1339 TypeBitfields TypeBits; 1340 ArrayTypeBitfields ArrayTypeBits; 1341 AttributedTypeBitfields AttributedTypeBits; 1342 AutoTypeBitfields AutoTypeBits; 1343 BuiltinTypeBitfields BuiltinTypeBits; 1344 FunctionTypeBitfields FunctionTypeBits; 1345 ObjCObjectTypeBitfields ObjCObjectTypeBits; 1346 ReferenceTypeBitfields ReferenceTypeBits; 1347 TypeWithKeywordBitfields TypeWithKeywordBits; 1348 VectorTypeBitfields VectorTypeBits; 1349 }; 1350 1351private: 1352 /// \brief Set whether this type comes from an AST file. 1353 void setFromAST(bool V = true) const { 1354 TypeBits.FromAST = V; 1355 } 1356 1357 template <class T> friend class TypePropertyCache; 1358 1359protected: 1360 // silence VC++ warning C4355: 'this' : used in base member initializer list 1361 Type *this_() { return this; } 1362 Type(TypeClass tc, QualType canon, bool Dependent, 1363 bool InstantiationDependent, bool VariablyModified, 1364 bool ContainsUnexpandedParameterPack) 1365 : ExtQualsTypeCommonBase(this, 1366 canon.isNull() ? QualType(this_(), 0) : canon) { 1367 TypeBits.TC = tc; 1368 TypeBits.Dependent = Dependent; 1369 TypeBits.InstantiationDependent = Dependent || InstantiationDependent; 1370 TypeBits.VariablyModified = VariablyModified; 1371 TypeBits.ContainsUnexpandedParameterPack = ContainsUnexpandedParameterPack; 1372 TypeBits.CacheValid = false; 1373 TypeBits.CachedLocalOrUnnamed = false; 1374 TypeBits.CachedLinkage = NoLinkage; 1375 TypeBits.FromAST = false; 1376 } 1377 friend class ASTContext; 1378 1379 void setDependent(bool D = true) { 1380 TypeBits.Dependent = D; 1381 if (D) 1382 TypeBits.InstantiationDependent = true; 1383 } 1384 void setInstantiationDependent(bool D = true) { 1385 TypeBits.InstantiationDependent = D; } 1386 void setVariablyModified(bool VM = true) { TypeBits.VariablyModified = VM; 1387 } 1388 void setContainsUnexpandedParameterPack(bool PP = true) { 1389 TypeBits.ContainsUnexpandedParameterPack = PP; 1390 } 1391 1392public: 1393 TypeClass getTypeClass() const { return static_cast<TypeClass>(TypeBits.TC); } 1394 1395 /// \brief Whether this type comes from an AST file. 1396 bool isFromAST() const { return TypeBits.FromAST; } 1397 1398 /// \brief Whether this type is or contains an unexpanded parameter 1399 /// pack, used to support C++0x variadic templates. 1400 /// 1401 /// A type that contains a parameter pack shall be expanded by the 1402 /// ellipsis operator at some point. For example, the typedef in the 1403 /// following example contains an unexpanded parameter pack 'T': 1404 /// 1405 /// \code 1406 /// template<typename ...T> 1407 /// struct X { 1408 /// typedef T* pointer_types; // ill-formed; T is a parameter pack. 1409 /// }; 1410 /// \endcode 1411 /// 1412 /// Note that this routine does not specify which 1413 bool containsUnexpandedParameterPack() const { 1414 return TypeBits.ContainsUnexpandedParameterPack; 1415 } 1416 1417 /// Determines if this type would be canonical if it had no further 1418 /// qualification. 1419 bool isCanonicalUnqualified() const { 1420 return CanonicalType == QualType(this, 0); 1421 } 1422 1423 /// Pull a single level of sugar off of this locally-unqualified type. 1424 /// Users should generally prefer SplitQualType::getSingleStepDesugaredType() 1425 /// or QualType::getSingleStepDesugaredType(const ASTContext&). 1426 QualType getLocallyUnqualifiedSingleStepDesugaredType() const; 1427 1428 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 1429 /// object types, function types, and incomplete types. 1430 1431 /// isIncompleteType - Return true if this is an incomplete type. 1432 /// A type that can describe objects, but which lacks information needed to 1433 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 1434 /// routine will need to determine if the size is actually required. 1435 /// 1436 /// \brief Def If non-NULL, and the type refers to some kind of declaration 1437 /// that can be completed (such as a C struct, C++ class, or Objective-C 1438 /// class), will be set to the declaration. 1439 bool isIncompleteType(NamedDecl **Def = 0) const; 1440 1441 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 1442 /// type, in other words, not a function type. 1443 bool isIncompleteOrObjectType() const { 1444 return !isFunctionType(); 1445 } 1446 1447 /// \brief Determine whether this type is an object type. 1448 bool isObjectType() const { 1449 // C++ [basic.types]p8: 1450 // An object type is a (possibly cv-qualified) type that is not a 1451 // function type, not a reference type, and not a void type. 1452 return !isReferenceType() && !isFunctionType() && !isVoidType(); 1453 } 1454 1455 /// isLiteralType - Return true if this is a literal type 1456 /// (C++11 [basic.types]p10) 1457 bool isLiteralType(ASTContext &Ctx) const; 1458 1459 /// \brief Test if this type is a standard-layout type. 1460 /// (C++0x [basic.type]p9) 1461 bool isStandardLayoutType() const; 1462 1463 /// Helper methods to distinguish type categories. All type predicates 1464 /// operate on the canonical type, ignoring typedefs and qualifiers. 1465 1466 /// isBuiltinType - returns true if the type is a builtin type. 1467 bool isBuiltinType() const; 1468 1469 /// isSpecificBuiltinType - Test for a particular builtin type. 1470 bool isSpecificBuiltinType(unsigned K) const; 1471 1472 /// isPlaceholderType - Test for a type which does not represent an 1473 /// actual type-system type but is instead used as a placeholder for 1474 /// various convenient purposes within Clang. All such types are 1475 /// BuiltinTypes. 1476 bool isPlaceholderType() const; 1477 const BuiltinType *getAsPlaceholderType() const; 1478 1479 /// isSpecificPlaceholderType - Test for a specific placeholder type. 1480 bool isSpecificPlaceholderType(unsigned K) const; 1481 1482 /// isNonOverloadPlaceholderType - Test for a placeholder type 1483 /// other than Overload; see BuiltinType::isNonOverloadPlaceholderType. 1484 bool isNonOverloadPlaceholderType() const; 1485 1486 /// isIntegerType() does *not* include complex integers (a GCC extension). 1487 /// isComplexIntegerType() can be used to test for complex integers. 1488 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 1489 bool isEnumeralType() const; 1490 bool isBooleanType() const; 1491 bool isCharType() const; 1492 bool isWideCharType() const; 1493 bool isChar16Type() const; 1494 bool isChar32Type() const; 1495 bool isAnyCharacterType() const; 1496 bool isIntegralType(ASTContext &Ctx) const; 1497 1498 /// \brief Determine whether this type is an integral or enumeration type. 1499 bool isIntegralOrEnumerationType() const; 1500 /// \brief Determine whether this type is an integral or unscoped enumeration 1501 /// type. 1502 bool isIntegralOrUnscopedEnumerationType() const; 1503 1504 /// Floating point categories. 1505 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 1506 /// isComplexType() does *not* include complex integers (a GCC extension). 1507 /// isComplexIntegerType() can be used to test for complex integers. 1508 bool isComplexType() const; // C99 6.2.5p11 (complex) 1509 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 1510 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 1511 bool isHalfType() const; // OpenCL 6.1.1.1, NEON (IEEE 754-2008 half) 1512 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 1513 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 1514 bool isVoidType() const; // C99 6.2.5p19 1515 bool isDerivedType() const; // C99 6.2.5p20 1516 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 1517 bool isAggregateType() const; 1518 bool isFundamentalType() const; 1519 bool isCompoundType() const; 1520 1521 // Type Predicates: Check to see if this type is structurally the specified 1522 // type, ignoring typedefs and qualifiers. 1523 bool isFunctionType() const; 1524 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 1525 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 1526 bool isPointerType() const; 1527 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 1528 bool isBlockPointerType() const; 1529 bool isVoidPointerType() const; 1530 bool isReferenceType() const; 1531 bool isLValueReferenceType() const; 1532 bool isRValueReferenceType() const; 1533 bool isFunctionPointerType() const; 1534 bool isMemberPointerType() const; 1535 bool isMemberFunctionPointerType() const; 1536 bool isMemberDataPointerType() const; 1537 bool isArrayType() const; 1538 bool isConstantArrayType() const; 1539 bool isIncompleteArrayType() const; 1540 bool isVariableArrayType() const; 1541 bool isDependentSizedArrayType() const; 1542 bool isRecordType() const; 1543 bool isClassType() const; 1544 bool isStructureType() const; 1545 bool isInterfaceType() const; 1546 bool isStructureOrClassType() const; 1547 bool isUnionType() const; 1548 bool isComplexIntegerType() const; // GCC _Complex integer type. 1549 bool isVectorType() const; // GCC vector type. 1550 bool isExtVectorType() const; // Extended vector type. 1551 bool isObjCObjectPointerType() const; // pointer to ObjC object 1552 bool isObjCRetainableType() const; // ObjC object or block pointer 1553 bool isObjCLifetimeType() const; // (array of)* retainable type 1554 bool isObjCIndirectLifetimeType() const; // (pointer to)* lifetime type 1555 bool isObjCNSObjectType() const; // __attribute__((NSObject)) 1556 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 1557 // for the common case. 1558 bool isObjCObjectType() const; // NSString or typeof(*(id)0) 1559 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 1560 bool isObjCQualifiedIdType() const; // id<foo> 1561 bool isObjCQualifiedClassType() const; // Class<foo> 1562 bool isObjCObjectOrInterfaceType() const; 1563 bool isObjCIdType() const; // id 1564 bool isObjCClassType() const; // Class 1565 bool isObjCSelType() const; // Class 1566 bool isObjCBuiltinType() const; // 'id' or 'Class' 1567 bool isObjCARCBridgableType() const; 1568 bool isCARCBridgableType() const; 1569 bool isTemplateTypeParmType() const; // C++ template type parameter 1570 bool isNullPtrType() const; // C++0x nullptr_t 1571 bool isAtomicType() const; // C11 _Atomic() 1572 1573 bool isImage1dT() const; // OpenCL image1d_t 1574 bool isImage1dArrayT() const; // OpenCL image1d_array_t 1575 bool isImage1dBufferT() const; // OpenCL image1d_buffer_t 1576 bool isImage2dT() const; // OpenCL image2d_t 1577 bool isImage2dArrayT() const; // OpenCL image2d_array_t 1578 bool isImage3dT() const; // OpenCL image3d_t 1579 1580 bool isImageType() const; // Any OpenCL image type 1581 1582 bool isSamplerT() const; // OpenCL sampler_t 1583 bool isEventT() const; // OpenCL event_t 1584 1585 bool isOpenCLSpecificType() const; // Any OpenCL specific type 1586 1587 /// Determines if this type, which must satisfy 1588 /// isObjCLifetimeType(), is implicitly __unsafe_unretained rather 1589 /// than implicitly __strong. 1590 bool isObjCARCImplicitlyUnretainedType() const; 1591 1592 /// Return the implicit lifetime for this type, which must not be dependent. 1593 Qualifiers::ObjCLifetime getObjCARCImplicitLifetime() const; 1594 1595 enum ScalarTypeKind { 1596 STK_CPointer, 1597 STK_BlockPointer, 1598 STK_ObjCObjectPointer, 1599 STK_MemberPointer, 1600 STK_Bool, 1601 STK_Integral, 1602 STK_Floating, 1603 STK_IntegralComplex, 1604 STK_FloatingComplex 1605 }; 1606 /// getScalarTypeKind - Given that this is a scalar type, classify it. 1607 ScalarTypeKind getScalarTypeKind() const; 1608 1609 /// isDependentType - Whether this type is a dependent type, meaning 1610 /// that its definition somehow depends on a template parameter 1611 /// (C++ [temp.dep.type]). 1612 bool isDependentType() const { return TypeBits.Dependent; } 1613 1614 /// \brief Determine whether this type is an instantiation-dependent type, 1615 /// meaning that the type involves a template parameter (even if the 1616 /// definition does not actually depend on the type substituted for that 1617 /// template parameter). 1618 bool isInstantiationDependentType() const { 1619 return TypeBits.InstantiationDependent; 1620 } 1621 1622 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 1623 bool isVariablyModifiedType() const { return TypeBits.VariablyModified; } 1624 1625 /// \brief Whether this type involves a variable-length array type 1626 /// with a definite size. 1627 bool hasSizedVLAType() const; 1628 1629 /// \brief Whether this type is or contains a local or unnamed type. 1630 bool hasUnnamedOrLocalType() const; 1631 1632 bool isOverloadableType() const; 1633 1634 /// \brief Determine wither this type is a C++ elaborated-type-specifier. 1635 bool isElaboratedTypeSpecifier() const; 1636 1637 bool canDecayToPointerType() const; 1638 1639 /// hasPointerRepresentation - Whether this type is represented 1640 /// natively as a pointer; this includes pointers, references, block 1641 /// pointers, and Objective-C interface, qualified id, and qualified 1642 /// interface types, as well as nullptr_t. 1643 bool hasPointerRepresentation() const; 1644 1645 /// hasObjCPointerRepresentation - Whether this type can represent 1646 /// an objective pointer type for the purpose of GC'ability 1647 bool hasObjCPointerRepresentation() const; 1648 1649 /// \brief Determine whether this type has an integer representation 1650 /// of some sort, e.g., it is an integer type or a vector. 1651 bool hasIntegerRepresentation() const; 1652 1653 /// \brief Determine whether this type has an signed integer representation 1654 /// of some sort, e.g., it is an signed integer type or a vector. 1655 bool hasSignedIntegerRepresentation() const; 1656 1657 /// \brief Determine whether this type has an unsigned integer representation 1658 /// of some sort, e.g., it is an unsigned integer type or a vector. 1659 bool hasUnsignedIntegerRepresentation() const; 1660 1661 /// \brief Determine whether this type has a floating-point representation 1662 /// of some sort, e.g., it is a floating-point type or a vector thereof. 1663 bool hasFloatingRepresentation() const; 1664 1665 // Type Checking Functions: Check to see if this type is structurally the 1666 // specified type, ignoring typedefs and qualifiers, and return a pointer to 1667 // the best type we can. 1668 const RecordType *getAsStructureType() const; 1669 /// NOTE: getAs*ArrayType are methods on ASTContext. 1670 const RecordType *getAsUnionType() const; 1671 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 1672 // The following is a convenience method that returns an ObjCObjectPointerType 1673 // for object declared using an interface. 1674 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 1675 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 1676 const ObjCObjectPointerType *getAsObjCQualifiedClassType() const; 1677 const ObjCObjectType *getAsObjCQualifiedInterfaceType() const; 1678 1679 /// \brief Retrieves the CXXRecordDecl that this type refers to, either 1680 /// because the type is a RecordType or because it is the injected-class-name 1681 /// type of a class template or class template partial specialization. 1682 CXXRecordDecl *getAsCXXRecordDecl() const; 1683 1684 /// If this is a pointer or reference to a RecordType, return the 1685 /// CXXRecordDecl that that type refers to. 1686 /// 1687 /// If this is not a pointer or reference, or the type being pointed to does 1688 /// not refer to a CXXRecordDecl, returns NULL. 1689 const CXXRecordDecl *getPointeeCXXRecordDecl() const; 1690 1691 /// \brief Get the AutoType whose type will be deduced for a variable with 1692 /// an initializer of this type. This looks through declarators like pointer 1693 /// types, but not through decltype or typedefs. 1694 AutoType *getContainedAutoType() const; 1695 1696 /// Member-template getAs<specific type>'. Look through sugar for 1697 /// an instance of \<specific type>. This scheme will eventually 1698 /// replace the specific getAsXXXX methods above. 1699 /// 1700 /// There are some specializations of this member template listed 1701 /// immediately following this class. 1702 template <typename T> const T *getAs() const; 1703 1704 /// A variant of getAs<> for array types which silently discards 1705 /// qualifiers from the outermost type. 1706 const ArrayType *getAsArrayTypeUnsafe() const; 1707 1708 /// Member-template castAs<specific type>. Look through sugar for 1709 /// the underlying instance of \<specific type>. 1710 /// 1711 /// This method has the same relationship to getAs<T> as cast<T> has 1712 /// to dyn_cast<T>; which is to say, the underlying type *must* 1713 /// have the intended type, and this method will never return null. 1714 template <typename T> const T *castAs() const; 1715 1716 /// A variant of castAs<> for array type which silently discards 1717 /// qualifiers from the outermost type. 1718 const ArrayType *castAsArrayTypeUnsafe() const; 1719 1720 /// getBaseElementTypeUnsafe - Get the base element type of this 1721 /// type, potentially discarding type qualifiers. This method 1722 /// should never be used when type qualifiers are meaningful. 1723 const Type *getBaseElementTypeUnsafe() const; 1724 1725 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 1726 /// element type of the array, potentially with type qualifiers missing. 1727 /// This method should never be used when type qualifiers are meaningful. 1728 const Type *getArrayElementTypeNoTypeQual() const; 1729 1730 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 1731 /// pointer, this returns the respective pointee. 1732 QualType getPointeeType() const; 1733 1734 /// getUnqualifiedDesugaredType() - Return the specified type with 1735 /// any "sugar" removed from the type, removing any typedefs, 1736 /// typeofs, etc., as well as any qualifiers. 1737 const Type *getUnqualifiedDesugaredType() const; 1738 1739 /// More type predicates useful for type checking/promotion 1740 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 1741 1742 /// isSignedIntegerType - Return true if this is an integer type that is 1743 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 1744 /// or an enum decl which has a signed representation. 1745 bool isSignedIntegerType() const; 1746 1747 /// isUnsignedIntegerType - Return true if this is an integer type that is 1748 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], 1749 /// or an enum decl which has an unsigned representation. 1750 bool isUnsignedIntegerType() const; 1751 1752 /// Determines whether this is an integer type that is signed or an 1753 /// enumeration types whose underlying type is a signed integer type. 1754 bool isSignedIntegerOrEnumerationType() const; 1755 1756 /// Determines whether this is an integer type that is unsigned or an 1757 /// enumeration types whose underlying type is a unsigned integer type. 1758 bool isUnsignedIntegerOrEnumerationType() const; 1759 1760 /// isConstantSizeType - Return true if this is not a variable sized type, 1761 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 1762 /// incomplete types. 1763 bool isConstantSizeType() const; 1764 1765 /// isSpecifierType - Returns true if this type can be represented by some 1766 /// set of type specifiers. 1767 bool isSpecifierType() const; 1768 1769 /// \brief Determine the linkage of this type. 1770 Linkage getLinkage() const; 1771 1772 /// \brief Determine the visibility of this type. 1773 Visibility getVisibility() const { 1774 return getLinkageAndVisibility().getVisibility(); 1775 } 1776 1777 /// \brief Return true if the visibility was explicitly set is the code. 1778 bool isVisibilityExplicit() const { 1779 return getLinkageAndVisibility().isVisibilityExplicit(); 1780 } 1781 1782 /// \brief Determine the linkage and visibility of this type. 1783 LinkageInfo getLinkageAndVisibility() const; 1784 1785 /// \brief True if the computed linkage is valid. Used for consistency 1786 /// checking. Should always return true. 1787 bool isLinkageValid() const; 1788 1789 const char *getTypeClassName() const; 1790 1791 QualType getCanonicalTypeInternal() const { 1792 return CanonicalType; 1793 } 1794 CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h 1795 LLVM_ATTRIBUTE_USED void dump() const; 1796 1797 friend class ASTReader; 1798 friend class ASTWriter; 1799}; 1800 1801/// \brief This will check for a TypedefType by removing any existing sugar 1802/// until it reaches a TypedefType or a non-sugared type. 1803template <> const TypedefType *Type::getAs() const; 1804 1805/// \brief This will check for a TemplateSpecializationType by removing any 1806/// existing sugar until it reaches a TemplateSpecializationType or a 1807/// non-sugared type. 1808template <> const TemplateSpecializationType *Type::getAs() const; 1809 1810// We can do canonical leaf types faster, because we don't have to 1811// worry about preserving child type decoration. 1812#define TYPE(Class, Base) 1813#define LEAF_TYPE(Class) \ 1814template <> inline const Class##Type *Type::getAs() const { \ 1815 return dyn_cast<Class##Type>(CanonicalType); \ 1816} \ 1817template <> inline const Class##Type *Type::castAs() const { \ 1818 return cast<Class##Type>(CanonicalType); \ 1819} 1820#include "clang/AST/TypeNodes.def" 1821 1822 1823/// BuiltinType - This class is used for builtin types like 'int'. Builtin 1824/// types are always canonical and have a literal name field. 1825class BuiltinType : public Type { 1826public: 1827 enum Kind { 1828#define BUILTIN_TYPE(Id, SingletonId) Id, 1829#define LAST_BUILTIN_TYPE(Id) LastKind = Id 1830#include "clang/AST/BuiltinTypes.def" 1831 }; 1832 1833public: 1834 BuiltinType(Kind K) 1835 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent), 1836 /*InstantiationDependent=*/(K == Dependent), 1837 /*VariablyModified=*/false, 1838 /*Unexpanded paramter pack=*/false) { 1839 BuiltinTypeBits.Kind = K; 1840 } 1841 1842 Kind getKind() const { return static_cast<Kind>(BuiltinTypeBits.Kind); } 1843 StringRef getName(const PrintingPolicy &Policy) const; 1844 const char *getNameAsCString(const PrintingPolicy &Policy) const { 1845 // The StringRef is null-terminated. 1846 StringRef str = getName(Policy); 1847 assert(!str.empty() && str.data()[str.size()] == '\0'); 1848 return str.data(); 1849 } 1850 1851 bool isSugared() const { return false; } 1852 QualType desugar() const { return QualType(this, 0); } 1853 1854 bool isInteger() const { 1855 return getKind() >= Bool && getKind() <= Int128; 1856 } 1857 1858 bool isSignedInteger() const { 1859 return getKind() >= Char_S && getKind() <= Int128; 1860 } 1861 1862 bool isUnsignedInteger() const { 1863 return getKind() >= Bool && getKind() <= UInt128; 1864 } 1865 1866 bool isFloatingPoint() const { 1867 return getKind() >= Half && getKind() <= LongDouble; 1868 } 1869 1870 /// Determines whether the given kind corresponds to a placeholder type. 1871 static bool isPlaceholderTypeKind(Kind K) { 1872 return K >= Overload; 1873 } 1874 1875 /// Determines whether this type is a placeholder type, i.e. a type 1876 /// which cannot appear in arbitrary positions in a fully-formed 1877 /// expression. 1878 bool isPlaceholderType() const { 1879 return isPlaceholderTypeKind(getKind()); 1880 } 1881 1882 /// Determines whether this type is a placeholder type other than 1883 /// Overload. Most placeholder types require only syntactic 1884 /// information about their context in order to be resolved (e.g. 1885 /// whether it is a call expression), which means they can (and 1886 /// should) be resolved in an earlier "phase" of analysis. 1887 /// Overload expressions sometimes pick up further information 1888 /// from their context, like whether the context expects a 1889 /// specific function-pointer type, and so frequently need 1890 /// special treatment. 1891 bool isNonOverloadPlaceholderType() const { 1892 return getKind() > Overload; 1893 } 1894 1895 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1896}; 1897 1898/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1899/// types (_Complex float etc) as well as the GCC integer complex extensions. 1900/// 1901class ComplexType : public Type, public llvm::FoldingSetNode { 1902 QualType ElementType; 1903 ComplexType(QualType Element, QualType CanonicalPtr) : 1904 Type(Complex, CanonicalPtr, Element->isDependentType(), 1905 Element->isInstantiationDependentType(), 1906 Element->isVariablyModifiedType(), 1907 Element->containsUnexpandedParameterPack()), 1908 ElementType(Element) { 1909 } 1910 friend class ASTContext; // ASTContext creates these. 1911 1912public: 1913 QualType getElementType() const { return ElementType; } 1914 1915 bool isSugared() const { return false; } 1916 QualType desugar() const { return QualType(this, 0); } 1917 1918 void Profile(llvm::FoldingSetNodeID &ID) { 1919 Profile(ID, getElementType()); 1920 } 1921 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1922 ID.AddPointer(Element.getAsOpaquePtr()); 1923 } 1924 1925 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1926}; 1927 1928/// ParenType - Sugar for parentheses used when specifying types. 1929/// 1930class ParenType : public Type, public llvm::FoldingSetNode { 1931 QualType Inner; 1932 1933 ParenType(QualType InnerType, QualType CanonType) : 1934 Type(Paren, CanonType, InnerType->isDependentType(), 1935 InnerType->isInstantiationDependentType(), 1936 InnerType->isVariablyModifiedType(), 1937 InnerType->containsUnexpandedParameterPack()), 1938 Inner(InnerType) { 1939 } 1940 friend class ASTContext; // ASTContext creates these. 1941 1942public: 1943 1944 QualType getInnerType() const { return Inner; } 1945 1946 bool isSugared() const { return true; } 1947 QualType desugar() const { return getInnerType(); } 1948 1949 void Profile(llvm::FoldingSetNodeID &ID) { 1950 Profile(ID, getInnerType()); 1951 } 1952 static void Profile(llvm::FoldingSetNodeID &ID, QualType Inner) { 1953 Inner.Profile(ID); 1954 } 1955 1956 static bool classof(const Type *T) { return T->getTypeClass() == Paren; } 1957}; 1958 1959/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1960/// 1961class PointerType : public Type, public llvm::FoldingSetNode { 1962 QualType PointeeType; 1963 1964 PointerType(QualType Pointee, QualType CanonicalPtr) : 1965 Type(Pointer, CanonicalPtr, Pointee->isDependentType(), 1966 Pointee->isInstantiationDependentType(), 1967 Pointee->isVariablyModifiedType(), 1968 Pointee->containsUnexpandedParameterPack()), 1969 PointeeType(Pointee) { 1970 } 1971 friend class ASTContext; // ASTContext creates these. 1972 1973public: 1974 1975 QualType getPointeeType() const { return PointeeType; } 1976 1977 bool isSugared() const { return false; } 1978 QualType desugar() const { return QualType(this, 0); } 1979 1980 void Profile(llvm::FoldingSetNodeID &ID) { 1981 Profile(ID, getPointeeType()); 1982 } 1983 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1984 ID.AddPointer(Pointee.getAsOpaquePtr()); 1985 } 1986 1987 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1988}; 1989 1990/// BlockPointerType - pointer to a block type. 1991/// This type is to represent types syntactically represented as 1992/// "void (^)(int)", etc. Pointee is required to always be a function type. 1993/// 1994class BlockPointerType : public Type, public llvm::FoldingSetNode { 1995 QualType PointeeType; // Block is some kind of pointer type 1996 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1997 Type(BlockPointer, CanonicalCls, Pointee->isDependentType(), 1998 Pointee->isInstantiationDependentType(), 1999 Pointee->isVariablyModifiedType(), 2000 Pointee->containsUnexpandedParameterPack()), 2001 PointeeType(Pointee) { 2002 } 2003 friend class ASTContext; // ASTContext creates these. 2004 2005public: 2006 2007 // Get the pointee type. Pointee is required to always be a function type. 2008 QualType getPointeeType() const { return PointeeType; } 2009 2010 bool isSugared() const { return false; } 2011 QualType desugar() const { return QualType(this, 0); } 2012 2013 void Profile(llvm::FoldingSetNodeID &ID) { 2014 Profile(ID, getPointeeType()); 2015 } 2016 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 2017 ID.AddPointer(Pointee.getAsOpaquePtr()); 2018 } 2019 2020 static bool classof(const Type *T) { 2021 return T->getTypeClass() == BlockPointer; 2022 } 2023}; 2024 2025/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 2026/// 2027class ReferenceType : public Type, public llvm::FoldingSetNode { 2028 QualType PointeeType; 2029 2030protected: 2031 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 2032 bool SpelledAsLValue) : 2033 Type(tc, CanonicalRef, Referencee->isDependentType(), 2034 Referencee->isInstantiationDependentType(), 2035 Referencee->isVariablyModifiedType(), 2036 Referencee->containsUnexpandedParameterPack()), 2037 PointeeType(Referencee) 2038 { 2039 ReferenceTypeBits.SpelledAsLValue = SpelledAsLValue; 2040 ReferenceTypeBits.InnerRef = Referencee->isReferenceType(); 2041 } 2042 2043public: 2044 bool isSpelledAsLValue() const { return ReferenceTypeBits.SpelledAsLValue; } 2045 bool isInnerRef() const { return ReferenceTypeBits.InnerRef; } 2046 2047 QualType getPointeeTypeAsWritten() const { return PointeeType; } 2048 QualType getPointeeType() const { 2049 // FIXME: this might strip inner qualifiers; okay? 2050 const ReferenceType *T = this; 2051 while (T->isInnerRef()) 2052 T = T->PointeeType->castAs<ReferenceType>(); 2053 return T->PointeeType; 2054 } 2055 2056 void Profile(llvm::FoldingSetNodeID &ID) { 2057 Profile(ID, PointeeType, isSpelledAsLValue()); 2058 } 2059 static void Profile(llvm::FoldingSetNodeID &ID, 2060 QualType Referencee, 2061 bool SpelledAsLValue) { 2062 ID.AddPointer(Referencee.getAsOpaquePtr()); 2063 ID.AddBoolean(SpelledAsLValue); 2064 } 2065 2066 static bool classof(const Type *T) { 2067 return T->getTypeClass() == LValueReference || 2068 T->getTypeClass() == RValueReference; 2069 } 2070}; 2071 2072/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 2073/// 2074class LValueReferenceType : public ReferenceType { 2075 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 2076 bool SpelledAsLValue) : 2077 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 2078 {} 2079 friend class ASTContext; // ASTContext creates these 2080public: 2081 bool isSugared() const { return false; } 2082 QualType desugar() const { return QualType(this, 0); } 2083 2084 static bool classof(const Type *T) { 2085 return T->getTypeClass() == LValueReference; 2086 } 2087}; 2088 2089/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 2090/// 2091class RValueReferenceType : public ReferenceType { 2092 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 2093 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 2094 } 2095 friend class ASTContext; // ASTContext creates these 2096public: 2097 bool isSugared() const { return false; } 2098 QualType desugar() const { return QualType(this, 0); } 2099 2100 static bool classof(const Type *T) { 2101 return T->getTypeClass() == RValueReference; 2102 } 2103}; 2104 2105/// MemberPointerType - C++ 8.3.3 - Pointers to members 2106/// 2107class MemberPointerType : public Type, public llvm::FoldingSetNode { 2108 QualType PointeeType; 2109 /// The class of which the pointee is a member. Must ultimately be a 2110 /// RecordType, but could be a typedef or a template parameter too. 2111 const Type *Class; 2112 2113 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 2114 Type(MemberPointer, CanonicalPtr, 2115 Cls->isDependentType() || Pointee->isDependentType(), 2116 (Cls->isInstantiationDependentType() || 2117 Pointee->isInstantiationDependentType()), 2118 Pointee->isVariablyModifiedType(), 2119 (Cls->containsUnexpandedParameterPack() || 2120 Pointee->containsUnexpandedParameterPack())), 2121 PointeeType(Pointee), Class(Cls) { 2122 } 2123 friend class ASTContext; // ASTContext creates these. 2124 2125public: 2126 QualType getPointeeType() const { return PointeeType; } 2127 2128 /// Returns true if the member type (i.e. the pointee type) is a 2129 /// function type rather than a data-member type. 2130 bool isMemberFunctionPointer() const { 2131 return PointeeType->isFunctionProtoType(); 2132 } 2133 2134 /// Returns true if the member type (i.e. the pointee type) is a 2135 /// data type rather than a function type. 2136 bool isMemberDataPointer() const { 2137 return !PointeeType->isFunctionProtoType(); 2138 } 2139 2140 const Type *getClass() const { return Class; } 2141 2142 bool isSugared() const { return false; } 2143 QualType desugar() const { return QualType(this, 0); } 2144 2145 void Profile(llvm::FoldingSetNodeID &ID) { 2146 Profile(ID, getPointeeType(), getClass()); 2147 } 2148 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 2149 const Type *Class) { 2150 ID.AddPointer(Pointee.getAsOpaquePtr()); 2151 ID.AddPointer(Class); 2152 } 2153 2154 static bool classof(const Type *T) { 2155 return T->getTypeClass() == MemberPointer; 2156 } 2157}; 2158 2159/// ArrayType - C99 6.7.5.2 - Array Declarators. 2160/// 2161class ArrayType : public Type, public llvm::FoldingSetNode { 2162public: 2163 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 2164 /// an array with a static size (e.g. int X[static 4]), or an array 2165 /// with a star size (e.g. int X[*]). 2166 /// 'static' is only allowed on function parameters. 2167 enum ArraySizeModifier { 2168 Normal, Static, Star 2169 }; 2170private: 2171 /// ElementType - The element type of the array. 2172 QualType ElementType; 2173 2174protected: 2175 // C++ [temp.dep.type]p1: 2176 // A type is dependent if it is... 2177 // - an array type constructed from any dependent type or whose 2178 // size is specified by a constant expression that is 2179 // value-dependent, 2180 ArrayType(TypeClass tc, QualType et, QualType can, 2181 ArraySizeModifier sm, unsigned tq, 2182 bool ContainsUnexpandedParameterPack) 2183 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray, 2184 et->isInstantiationDependentType() || tc == DependentSizedArray, 2185 (tc == VariableArray || et->isVariablyModifiedType()), 2186 ContainsUnexpandedParameterPack), 2187 ElementType(et) { 2188 ArrayTypeBits.IndexTypeQuals = tq; 2189 ArrayTypeBits.SizeModifier = sm; 2190 } 2191 2192 friend class ASTContext; // ASTContext creates these. 2193 2194public: 2195 QualType getElementType() const { return ElementType; } 2196 ArraySizeModifier getSizeModifier() const { 2197 return ArraySizeModifier(ArrayTypeBits.SizeModifier); 2198 } 2199 Qualifiers getIndexTypeQualifiers() const { 2200 return Qualifiers::fromCVRMask(getIndexTypeCVRQualifiers()); 2201 } 2202 unsigned getIndexTypeCVRQualifiers() const { 2203 return ArrayTypeBits.IndexTypeQuals; 2204 } 2205 2206 static bool classof(const Type *T) { 2207 return T->getTypeClass() == ConstantArray || 2208 T->getTypeClass() == VariableArray || 2209 T->getTypeClass() == IncompleteArray || 2210 T->getTypeClass() == DependentSizedArray; 2211 } 2212}; 2213 2214/// ConstantArrayType - This class represents the canonical version of 2215/// C arrays with a specified constant size. For example, the canonical 2216/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 2217/// type is 'int' and the size is 404. 2218class ConstantArrayType : public ArrayType { 2219 llvm::APInt Size; // Allows us to unique the type. 2220 2221 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 2222 ArraySizeModifier sm, unsigned tq) 2223 : ArrayType(ConstantArray, et, can, sm, tq, 2224 et->containsUnexpandedParameterPack()), 2225 Size(size) {} 2226protected: 2227 ConstantArrayType(TypeClass tc, QualType et, QualType can, 2228 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 2229 : ArrayType(tc, et, can, sm, tq, et->containsUnexpandedParameterPack()), 2230 Size(size) {} 2231 friend class ASTContext; // ASTContext creates these. 2232public: 2233 const llvm::APInt &getSize() const { return Size; } 2234 bool isSugared() const { return false; } 2235 QualType desugar() const { return QualType(this, 0); } 2236 2237 2238 /// \brief Determine the number of bits required to address a member of 2239 // an array with the given element type and number of elements. 2240 static unsigned getNumAddressingBits(ASTContext &Context, 2241 QualType ElementType, 2242 const llvm::APInt &NumElements); 2243 2244 /// \brief Determine the maximum number of active bits that an array's size 2245 /// can require, which limits the maximum size of the array. 2246 static unsigned getMaxSizeBits(ASTContext &Context); 2247 2248 void Profile(llvm::FoldingSetNodeID &ID) { 2249 Profile(ID, getElementType(), getSize(), 2250 getSizeModifier(), getIndexTypeCVRQualifiers()); 2251 } 2252 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 2253 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 2254 unsigned TypeQuals) { 2255 ID.AddPointer(ET.getAsOpaquePtr()); 2256 ID.AddInteger(ArraySize.getZExtValue()); 2257 ID.AddInteger(SizeMod); 2258 ID.AddInteger(TypeQuals); 2259 } 2260 static bool classof(const Type *T) { 2261 return T->getTypeClass() == ConstantArray; 2262 } 2263}; 2264 2265/// IncompleteArrayType - This class represents C arrays with an unspecified 2266/// size. For example 'int A[]' has an IncompleteArrayType where the element 2267/// type is 'int' and the size is unspecified. 2268class IncompleteArrayType : public ArrayType { 2269 2270 IncompleteArrayType(QualType et, QualType can, 2271 ArraySizeModifier sm, unsigned tq) 2272 : ArrayType(IncompleteArray, et, can, sm, tq, 2273 et->containsUnexpandedParameterPack()) {} 2274 friend class ASTContext; // ASTContext creates these. 2275public: 2276 bool isSugared() const { return false; } 2277 QualType desugar() const { return QualType(this, 0); } 2278 2279 static bool classof(const Type *T) { 2280 return T->getTypeClass() == IncompleteArray; 2281 } 2282 2283 friend class StmtIteratorBase; 2284 2285 void Profile(llvm::FoldingSetNodeID &ID) { 2286 Profile(ID, getElementType(), getSizeModifier(), 2287 getIndexTypeCVRQualifiers()); 2288 } 2289 2290 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 2291 ArraySizeModifier SizeMod, unsigned TypeQuals) { 2292 ID.AddPointer(ET.getAsOpaquePtr()); 2293 ID.AddInteger(SizeMod); 2294 ID.AddInteger(TypeQuals); 2295 } 2296}; 2297 2298/// VariableArrayType - This class represents C arrays with a specified size 2299/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 2300/// Since the size expression is an arbitrary expression, we store it as such. 2301/// 2302/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 2303/// should not be: two lexically equivalent variable array types could mean 2304/// different things, for example, these variables do not have the same type 2305/// dynamically: 2306/// 2307/// void foo(int x) { 2308/// int Y[x]; 2309/// ++x; 2310/// int Z[x]; 2311/// } 2312/// 2313class VariableArrayType : public ArrayType { 2314 /// SizeExpr - An assignment expression. VLA's are only permitted within 2315 /// a function block. 2316 Stmt *SizeExpr; 2317 /// Brackets - The left and right array brackets. 2318 SourceRange Brackets; 2319 2320 VariableArrayType(QualType et, QualType can, Expr *e, 2321 ArraySizeModifier sm, unsigned tq, 2322 SourceRange brackets) 2323 : ArrayType(VariableArray, et, can, sm, tq, 2324 et->containsUnexpandedParameterPack()), 2325 SizeExpr((Stmt*) e), Brackets(brackets) {} 2326 friend class ASTContext; // ASTContext creates these. 2327 2328public: 2329 Expr *getSizeExpr() const { 2330 // We use C-style casts instead of cast<> here because we do not wish 2331 // to have a dependency of Type.h on Stmt.h/Expr.h. 2332 return (Expr*) SizeExpr; 2333 } 2334 SourceRange getBracketsRange() const { return Brackets; } 2335 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 2336 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 2337 2338 bool isSugared() const { return false; } 2339 QualType desugar() const { return QualType(this, 0); } 2340 2341 static bool classof(const Type *T) { 2342 return T->getTypeClass() == VariableArray; 2343 } 2344 2345 friend class StmtIteratorBase; 2346 2347 void Profile(llvm::FoldingSetNodeID &ID) { 2348 llvm_unreachable("Cannot unique VariableArrayTypes."); 2349 } 2350}; 2351 2352/// DependentSizedArrayType - This type represents an array type in 2353/// C++ whose size is a value-dependent expression. For example: 2354/// 2355/// \code 2356/// template<typename T, int Size> 2357/// class array { 2358/// T data[Size]; 2359/// }; 2360/// \endcode 2361/// 2362/// For these types, we won't actually know what the array bound is 2363/// until template instantiation occurs, at which point this will 2364/// become either a ConstantArrayType or a VariableArrayType. 2365class DependentSizedArrayType : public ArrayType { 2366 const ASTContext &Context; 2367 2368 /// \brief An assignment expression that will instantiate to the 2369 /// size of the array. 2370 /// 2371 /// The expression itself might be NULL, in which case the array 2372 /// type will have its size deduced from an initializer. 2373 Stmt *SizeExpr; 2374 2375 /// Brackets - The left and right array brackets. 2376 SourceRange Brackets; 2377 2378 DependentSizedArrayType(const ASTContext &Context, QualType et, QualType can, 2379 Expr *e, ArraySizeModifier sm, unsigned tq, 2380 SourceRange brackets); 2381 2382 friend class ASTContext; // ASTContext creates these. 2383 2384public: 2385 Expr *getSizeExpr() const { 2386 // We use C-style casts instead of cast<> here because we do not wish 2387 // to have a dependency of Type.h on Stmt.h/Expr.h. 2388 return (Expr*) SizeExpr; 2389 } 2390 SourceRange getBracketsRange() const { return Brackets; } 2391 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 2392 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 2393 2394 bool isSugared() const { return false; } 2395 QualType desugar() const { return QualType(this, 0); } 2396 2397 static bool classof(const Type *T) { 2398 return T->getTypeClass() == DependentSizedArray; 2399 } 2400 2401 friend class StmtIteratorBase; 2402 2403 2404 void Profile(llvm::FoldingSetNodeID &ID) { 2405 Profile(ID, Context, getElementType(), 2406 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 2407 } 2408 2409 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2410 QualType ET, ArraySizeModifier SizeMod, 2411 unsigned TypeQuals, Expr *E); 2412}; 2413 2414/// DependentSizedExtVectorType - This type represent an extended vector type 2415/// where either the type or size is dependent. For example: 2416/// @code 2417/// template<typename T, int Size> 2418/// class vector { 2419/// typedef T __attribute__((ext_vector_type(Size))) type; 2420/// } 2421/// @endcode 2422class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 2423 const ASTContext &Context; 2424 Expr *SizeExpr; 2425 /// ElementType - The element type of the array. 2426 QualType ElementType; 2427 SourceLocation loc; 2428 2429 DependentSizedExtVectorType(const ASTContext &Context, QualType ElementType, 2430 QualType can, Expr *SizeExpr, SourceLocation loc); 2431 2432 friend class ASTContext; 2433 2434public: 2435 Expr *getSizeExpr() const { return SizeExpr; } 2436 QualType getElementType() const { return ElementType; } 2437 SourceLocation getAttributeLoc() const { return loc; } 2438 2439 bool isSugared() const { return false; } 2440 QualType desugar() const { return QualType(this, 0); } 2441 2442 static bool classof(const Type *T) { 2443 return T->getTypeClass() == DependentSizedExtVector; 2444 } 2445 2446 void Profile(llvm::FoldingSetNodeID &ID) { 2447 Profile(ID, Context, getElementType(), getSizeExpr()); 2448 } 2449 2450 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2451 QualType ElementType, Expr *SizeExpr); 2452}; 2453 2454 2455/// VectorType - GCC generic vector type. This type is created using 2456/// __attribute__((vector_size(n)), where "n" specifies the vector size in 2457/// bytes; or from an Altivec __vector or vector declaration. 2458/// Since the constructor takes the number of vector elements, the 2459/// client is responsible for converting the size into the number of elements. 2460class VectorType : public Type, public llvm::FoldingSetNode { 2461public: 2462 enum VectorKind { 2463 GenericVector, // not a target-specific vector type 2464 AltiVecVector, // is AltiVec vector 2465 AltiVecPixel, // is AltiVec 'vector Pixel' 2466 AltiVecBool, // is AltiVec 'vector bool ...' 2467 NeonVector, // is ARM Neon vector 2468 NeonPolyVector // is ARM Neon polynomial vector 2469 }; 2470protected: 2471 /// ElementType - The element type of the vector. 2472 QualType ElementType; 2473 2474 VectorType(QualType vecType, unsigned nElements, QualType canonType, 2475 VectorKind vecKind); 2476 2477 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 2478 QualType canonType, VectorKind vecKind); 2479 2480 friend class ASTContext; // ASTContext creates these. 2481 2482public: 2483 2484 QualType getElementType() const { return ElementType; } 2485 unsigned getNumElements() const { return VectorTypeBits.NumElements; } 2486 2487 bool isSugared() const { return false; } 2488 QualType desugar() const { return QualType(this, 0); } 2489 2490 VectorKind getVectorKind() const { 2491 return VectorKind(VectorTypeBits.VecKind); 2492 } 2493 2494 void Profile(llvm::FoldingSetNodeID &ID) { 2495 Profile(ID, getElementType(), getNumElements(), 2496 getTypeClass(), getVectorKind()); 2497 } 2498 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 2499 unsigned NumElements, TypeClass TypeClass, 2500 VectorKind VecKind) { 2501 ID.AddPointer(ElementType.getAsOpaquePtr()); 2502 ID.AddInteger(NumElements); 2503 ID.AddInteger(TypeClass); 2504 ID.AddInteger(VecKind); 2505 } 2506 2507 static bool classof(const Type *T) { 2508 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 2509 } 2510}; 2511 2512/// ExtVectorType - Extended vector type. This type is created using 2513/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 2514/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 2515/// class enables syntactic extensions, like Vector Components for accessing 2516/// points, colors, and textures (modeled after OpenGL Shading Language). 2517class ExtVectorType : public VectorType { 2518 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 2519 VectorType(ExtVector, vecType, nElements, canonType, GenericVector) {} 2520 friend class ASTContext; // ASTContext creates these. 2521public: 2522 static int getPointAccessorIdx(char c) { 2523 switch (c) { 2524 default: return -1; 2525 case 'x': return 0; 2526 case 'y': return 1; 2527 case 'z': return 2; 2528 case 'w': return 3; 2529 } 2530 } 2531 static int getNumericAccessorIdx(char c) { 2532 switch (c) { 2533 default: return -1; 2534 case '0': return 0; 2535 case '1': return 1; 2536 case '2': return 2; 2537 case '3': return 3; 2538 case '4': return 4; 2539 case '5': return 5; 2540 case '6': return 6; 2541 case '7': return 7; 2542 case '8': return 8; 2543 case '9': return 9; 2544 case 'A': 2545 case 'a': return 10; 2546 case 'B': 2547 case 'b': return 11; 2548 case 'C': 2549 case 'c': return 12; 2550 case 'D': 2551 case 'd': return 13; 2552 case 'E': 2553 case 'e': return 14; 2554 case 'F': 2555 case 'f': return 15; 2556 } 2557 } 2558 2559 static int getAccessorIdx(char c) { 2560 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 2561 return getNumericAccessorIdx(c); 2562 } 2563 2564 bool isAccessorWithinNumElements(char c) const { 2565 if (int idx = getAccessorIdx(c)+1) 2566 return unsigned(idx-1) < getNumElements(); 2567 return false; 2568 } 2569 bool isSugared() const { return false; } 2570 QualType desugar() const { return QualType(this, 0); } 2571 2572 static bool classof(const Type *T) { 2573 return T->getTypeClass() == ExtVector; 2574 } 2575}; 2576 2577/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 2578/// class of FunctionNoProtoType and FunctionProtoType. 2579/// 2580class FunctionType : public Type { 2581 // The type returned by the function. 2582 QualType ResultType; 2583 2584 public: 2585 /// ExtInfo - A class which abstracts out some details necessary for 2586 /// making a call. 2587 /// 2588 /// It is not actually used directly for storing this information in 2589 /// a FunctionType, although FunctionType does currently use the 2590 /// same bit-pattern. 2591 /// 2592 // If you add a field (say Foo), other than the obvious places (both, 2593 // constructors, compile failures), what you need to update is 2594 // * Operator== 2595 // * getFoo 2596 // * withFoo 2597 // * functionType. Add Foo, getFoo. 2598 // * ASTContext::getFooType 2599 // * ASTContext::mergeFunctionTypes 2600 // * FunctionNoProtoType::Profile 2601 // * FunctionProtoType::Profile 2602 // * TypePrinter::PrintFunctionProto 2603 // * AST read and write 2604 // * Codegen 2605 class ExtInfo { 2606 // Feel free to rearrange or add bits, but if you go over 9, 2607 // you'll need to adjust both the Bits field below and 2608 // Type::FunctionTypeBitfields. 2609 2610 // | CC |noreturn|produces|regparm| 2611 // |0 .. 3| 4 | 5 | 6 .. 8| 2612 // 2613 // regparm is either 0 (no regparm attribute) or the regparm value+1. 2614 enum { CallConvMask = 0xF }; 2615 enum { NoReturnMask = 0x10 }; 2616 enum { ProducesResultMask = 0x20 }; 2617 enum { RegParmMask = ~(CallConvMask | NoReturnMask | ProducesResultMask), 2618 RegParmOffset = 6 }; // Assumed to be the last field 2619 2620 uint16_t Bits; 2621 2622 ExtInfo(unsigned Bits) : Bits(static_cast<uint16_t>(Bits)) {} 2623 2624 friend class FunctionType; 2625 2626 public: 2627 // Constructor with no defaults. Use this when you know that you 2628 // have all the elements (when reading an AST file for example). 2629 ExtInfo(bool noReturn, bool hasRegParm, unsigned regParm, CallingConv cc, 2630 bool producesResult) { 2631 assert((!hasRegParm || regParm < 7) && "Invalid regparm value"); 2632 Bits = ((unsigned) cc) | 2633 (noReturn ? NoReturnMask : 0) | 2634 (producesResult ? ProducesResultMask : 0) | 2635 (hasRegParm ? ((regParm + 1) << RegParmOffset) : 0); 2636 } 2637 2638 // Constructor with all defaults. Use when for example creating a 2639 // function know to use defaults. 2640 ExtInfo() : Bits(0) {} 2641 2642 bool getNoReturn() const { return Bits & NoReturnMask; } 2643 bool getProducesResult() const { return Bits & ProducesResultMask; } 2644 bool getHasRegParm() const { return (Bits >> RegParmOffset) != 0; } 2645 unsigned getRegParm() const { 2646 unsigned RegParm = Bits >> RegParmOffset; 2647 if (RegParm > 0) 2648 --RegParm; 2649 return RegParm; 2650 } 2651 CallingConv getCC() const { return CallingConv(Bits & CallConvMask); } 2652 2653 bool operator==(ExtInfo Other) const { 2654 return Bits == Other.Bits; 2655 } 2656 bool operator!=(ExtInfo Other) const { 2657 return Bits != Other.Bits; 2658 } 2659 2660 // Note that we don't have setters. That is by design, use 2661 // the following with methods instead of mutating these objects. 2662 2663 ExtInfo withNoReturn(bool noReturn) const { 2664 if (noReturn) 2665 return ExtInfo(Bits | NoReturnMask); 2666 else 2667 return ExtInfo(Bits & ~NoReturnMask); 2668 } 2669 2670 ExtInfo withProducesResult(bool producesResult) const { 2671 if (producesResult) 2672 return ExtInfo(Bits | ProducesResultMask); 2673 else 2674 return ExtInfo(Bits & ~ProducesResultMask); 2675 } 2676 2677 ExtInfo withRegParm(unsigned RegParm) const { 2678 assert(RegParm < 7 && "Invalid regparm value"); 2679 return ExtInfo((Bits & ~RegParmMask) | 2680 ((RegParm + 1) << RegParmOffset)); 2681 } 2682 2683 ExtInfo withCallingConv(CallingConv cc) const { 2684 return ExtInfo((Bits & ~CallConvMask) | (unsigned) cc); 2685 } 2686 2687 void Profile(llvm::FoldingSetNodeID &ID) const { 2688 ID.AddInteger(Bits); 2689 } 2690 }; 2691 2692protected: 2693 FunctionType(TypeClass tc, QualType res, 2694 unsigned typeQuals, QualType Canonical, bool Dependent, 2695 bool InstantiationDependent, 2696 bool VariablyModified, bool ContainsUnexpandedParameterPack, 2697 ExtInfo Info) 2698 : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified, 2699 ContainsUnexpandedParameterPack), 2700 ResultType(res) { 2701 FunctionTypeBits.ExtInfo = Info.Bits; 2702 FunctionTypeBits.TypeQuals = typeQuals; 2703 } 2704 unsigned getTypeQuals() const { return FunctionTypeBits.TypeQuals; } 2705 2706public: 2707 2708 QualType getResultType() const { return ResultType; } 2709 2710 bool getHasRegParm() const { return getExtInfo().getHasRegParm(); } 2711 unsigned getRegParmType() const { return getExtInfo().getRegParm(); } 2712 /// \brief Determine whether this function type includes the GNU noreturn 2713 /// attribute. The C++11 [[noreturn]] attribute does not affect the function 2714 /// type. 2715 bool getNoReturnAttr() const { return getExtInfo().getNoReturn(); } 2716 CallingConv getCallConv() const { return getExtInfo().getCC(); } 2717 ExtInfo getExtInfo() const { return ExtInfo(FunctionTypeBits.ExtInfo); } 2718 bool isConst() const { return getTypeQuals() & Qualifiers::Const; } 2719 bool isVolatile() const { return getTypeQuals() & Qualifiers::Volatile; } 2720 bool isRestrict() const { return getTypeQuals() & Qualifiers::Restrict; } 2721 2722 /// \brief Determine the type of an expression that calls a function of 2723 /// this type. 2724 QualType getCallResultType(ASTContext &Context) const { 2725 return getResultType().getNonLValueExprType(Context); 2726 } 2727 2728 static StringRef getNameForCallConv(CallingConv CC); 2729 2730 static bool classof(const Type *T) { 2731 return T->getTypeClass() == FunctionNoProto || 2732 T->getTypeClass() == FunctionProto; 2733 } 2734}; 2735 2736/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 2737/// no information available about its arguments. 2738class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 2739 FunctionNoProtoType(QualType Result, QualType Canonical, ExtInfo Info) 2740 : FunctionType(FunctionNoProto, Result, 0, Canonical, 2741 /*Dependent=*/false, /*InstantiationDependent=*/false, 2742 Result->isVariablyModifiedType(), 2743 /*ContainsUnexpandedParameterPack=*/false, Info) {} 2744 2745 friend class ASTContext; // ASTContext creates these. 2746 2747public: 2748 // No additional state past what FunctionType provides. 2749 2750 bool isSugared() const { return false; } 2751 QualType desugar() const { return QualType(this, 0); } 2752 2753 void Profile(llvm::FoldingSetNodeID &ID) { 2754 Profile(ID, getResultType(), getExtInfo()); 2755 } 2756 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 2757 ExtInfo Info) { 2758 Info.Profile(ID); 2759 ID.AddPointer(ResultType.getAsOpaquePtr()); 2760 } 2761 2762 static bool classof(const Type *T) { 2763 return T->getTypeClass() == FunctionNoProto; 2764 } 2765}; 2766 2767/// FunctionProtoType - Represents a prototype with argument type info, e.g. 2768/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 2769/// arguments, not as having a single void argument. Such a type can have an 2770/// exception specification, but this specification is not part of the canonical 2771/// type. 2772class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 2773public: 2774 /// ExtProtoInfo - Extra information about a function prototype. 2775 struct ExtProtoInfo { 2776 ExtProtoInfo() : 2777 Variadic(false), HasTrailingReturn(false), TypeQuals(0), 2778 ExceptionSpecType(EST_None), RefQualifier(RQ_None), 2779 NumExceptions(0), Exceptions(0), NoexceptExpr(0), 2780 ExceptionSpecDecl(0), ExceptionSpecTemplate(0), 2781 ConsumedArguments(0) {} 2782 2783 FunctionType::ExtInfo ExtInfo; 2784 bool Variadic : 1; 2785 bool HasTrailingReturn : 1; 2786 unsigned char TypeQuals; 2787 ExceptionSpecificationType ExceptionSpecType; 2788 RefQualifierKind RefQualifier; 2789 unsigned NumExceptions; 2790 const QualType *Exceptions; 2791 Expr *NoexceptExpr; 2792 FunctionDecl *ExceptionSpecDecl; 2793 FunctionDecl *ExceptionSpecTemplate; 2794 const bool *ConsumedArguments; 2795 }; 2796 2797private: 2798 /// \brief Determine whether there are any argument types that 2799 /// contain an unexpanded parameter pack. 2800 static bool containsAnyUnexpandedParameterPack(const QualType *ArgArray, 2801 unsigned numArgs) { 2802 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 2803 if (ArgArray[Idx]->containsUnexpandedParameterPack()) 2804 return true; 2805 2806 return false; 2807 } 2808 2809 FunctionProtoType(QualType result, ArrayRef<QualType> args, 2810 QualType canonical, const ExtProtoInfo &epi); 2811 2812 /// NumArgs - The number of arguments this function has, not counting '...'. 2813 unsigned NumArgs : 15; 2814 2815 /// NumExceptions - The number of types in the exception spec, if any. 2816 unsigned NumExceptions : 9; 2817 2818 /// ExceptionSpecType - The type of exception specification this function has. 2819 unsigned ExceptionSpecType : 3; 2820 2821 /// HasAnyConsumedArgs - Whether this function has any consumed arguments. 2822 unsigned HasAnyConsumedArgs : 1; 2823 2824 /// Variadic - Whether the function is variadic. 2825 unsigned Variadic : 1; 2826 2827 /// HasTrailingReturn - Whether this function has a trailing return type. 2828 unsigned HasTrailingReturn : 1; 2829 2830 /// \brief The ref-qualifier associated with a \c FunctionProtoType. 2831 /// 2832 /// This is a value of type \c RefQualifierKind. 2833 unsigned RefQualifier : 2; 2834 2835 // ArgInfo - There is an variable size array after the class in memory that 2836 // holds the argument types. 2837 2838 // Exceptions - There is another variable size array after ArgInfo that 2839 // holds the exception types. 2840 2841 // NoexceptExpr - Instead of Exceptions, there may be a single Expr* pointing 2842 // to the expression in the noexcept() specifier. 2843 2844 // ExceptionSpecDecl, ExceptionSpecTemplate - Instead of Exceptions, there may 2845 // be a pair of FunctionDecl* pointing to the function which should be used to 2846 // instantiate this function type's exception specification, and the function 2847 // from which it should be instantiated. 2848 2849 // ConsumedArgs - A variable size array, following Exceptions 2850 // and of length NumArgs, holding flags indicating which arguments 2851 // are consumed. This only appears if HasAnyConsumedArgs is true. 2852 2853 friend class ASTContext; // ASTContext creates these. 2854 2855 const bool *getConsumedArgsBuffer() const { 2856 assert(hasAnyConsumedArgs()); 2857 2858 // Find the end of the exceptions. 2859 Expr * const *eh_end = reinterpret_cast<Expr * const *>(arg_type_end()); 2860 if (getExceptionSpecType() != EST_ComputedNoexcept) 2861 eh_end += NumExceptions; 2862 else 2863 eh_end += 1; // NoexceptExpr 2864 2865 return reinterpret_cast<const bool*>(eh_end); 2866 } 2867 2868public: 2869 unsigned getNumArgs() const { return NumArgs; } 2870 QualType getArgType(unsigned i) const { 2871 assert(i < NumArgs && "Invalid argument number!"); 2872 return arg_type_begin()[i]; 2873 } 2874 ArrayRef<QualType> getArgTypes() const { 2875 return ArrayRef<QualType>(arg_type_begin(), arg_type_end()); 2876 } 2877 2878 ExtProtoInfo getExtProtoInfo() const { 2879 ExtProtoInfo EPI; 2880 EPI.ExtInfo = getExtInfo(); 2881 EPI.Variadic = isVariadic(); 2882 EPI.HasTrailingReturn = hasTrailingReturn(); 2883 EPI.ExceptionSpecType = getExceptionSpecType(); 2884 EPI.TypeQuals = static_cast<unsigned char>(getTypeQuals()); 2885 EPI.RefQualifier = getRefQualifier(); 2886 if (EPI.ExceptionSpecType == EST_Dynamic) { 2887 EPI.NumExceptions = NumExceptions; 2888 EPI.Exceptions = exception_begin(); 2889 } else if (EPI.ExceptionSpecType == EST_ComputedNoexcept) { 2890 EPI.NoexceptExpr = getNoexceptExpr(); 2891 } else if (EPI.ExceptionSpecType == EST_Uninstantiated) { 2892 EPI.ExceptionSpecDecl = getExceptionSpecDecl(); 2893 EPI.ExceptionSpecTemplate = getExceptionSpecTemplate(); 2894 } else if (EPI.ExceptionSpecType == EST_Unevaluated) { 2895 EPI.ExceptionSpecDecl = getExceptionSpecDecl(); 2896 } 2897 if (hasAnyConsumedArgs()) 2898 EPI.ConsumedArguments = getConsumedArgsBuffer(); 2899 return EPI; 2900 } 2901 2902 /// \brief Get the kind of exception specification on this function. 2903 ExceptionSpecificationType getExceptionSpecType() const { 2904 return static_cast<ExceptionSpecificationType>(ExceptionSpecType); 2905 } 2906 /// \brief Return whether this function has any kind of exception spec. 2907 bool hasExceptionSpec() const { 2908 return getExceptionSpecType() != EST_None; 2909 } 2910 /// \brief Return whether this function has a dynamic (throw) exception spec. 2911 bool hasDynamicExceptionSpec() const { 2912 return isDynamicExceptionSpec(getExceptionSpecType()); 2913 } 2914 /// \brief Return whether this function has a noexcept exception spec. 2915 bool hasNoexceptExceptionSpec() const { 2916 return isNoexceptExceptionSpec(getExceptionSpecType()); 2917 } 2918 /// \brief Result type of getNoexceptSpec(). 2919 enum NoexceptResult { 2920 NR_NoNoexcept, ///< There is no noexcept specifier. 2921 NR_BadNoexcept, ///< The noexcept specifier has a bad expression. 2922 NR_Dependent, ///< The noexcept specifier is dependent. 2923 NR_Throw, ///< The noexcept specifier evaluates to false. 2924 NR_Nothrow ///< The noexcept specifier evaluates to true. 2925 }; 2926 /// \brief Get the meaning of the noexcept spec on this function, if any. 2927 NoexceptResult getNoexceptSpec(ASTContext &Ctx) const; 2928 unsigned getNumExceptions() const { return NumExceptions; } 2929 QualType getExceptionType(unsigned i) const { 2930 assert(i < NumExceptions && "Invalid exception number!"); 2931 return exception_begin()[i]; 2932 } 2933 Expr *getNoexceptExpr() const { 2934 if (getExceptionSpecType() != EST_ComputedNoexcept) 2935 return 0; 2936 // NoexceptExpr sits where the arguments end. 2937 return *reinterpret_cast<Expr *const *>(arg_type_end()); 2938 } 2939 /// \brief If this function type has an exception specification which hasn't 2940 /// been determined yet (either because it has not been evaluated or because 2941 /// it has not been instantiated), this is the function whose exception 2942 /// specification is represented by this type. 2943 FunctionDecl *getExceptionSpecDecl() const { 2944 if (getExceptionSpecType() != EST_Uninstantiated && 2945 getExceptionSpecType() != EST_Unevaluated) 2946 return 0; 2947 return reinterpret_cast<FunctionDecl * const *>(arg_type_end())[0]; 2948 } 2949 /// \brief If this function type has an uninstantiated exception 2950 /// specification, this is the function whose exception specification 2951 /// should be instantiated to find the exception specification for 2952 /// this type. 2953 FunctionDecl *getExceptionSpecTemplate() const { 2954 if (getExceptionSpecType() != EST_Uninstantiated) 2955 return 0; 2956 return reinterpret_cast<FunctionDecl * const *>(arg_type_end())[1]; 2957 } 2958 bool isNothrow(ASTContext &Ctx) const { 2959 ExceptionSpecificationType EST = getExceptionSpecType(); 2960 assert(EST != EST_Unevaluated && EST != EST_Uninstantiated); 2961 if (EST == EST_DynamicNone || EST == EST_BasicNoexcept) 2962 return true; 2963 if (EST != EST_ComputedNoexcept) 2964 return false; 2965 return getNoexceptSpec(Ctx) == NR_Nothrow; 2966 } 2967 2968 bool isVariadic() const { return Variadic; } 2969 2970 /// \brief Determines whether this function prototype contains a 2971 /// parameter pack at the end. 2972 /// 2973 /// A function template whose last parameter is a parameter pack can be 2974 /// called with an arbitrary number of arguments, much like a variadic 2975 /// function. 2976 bool isTemplateVariadic() const; 2977 2978 bool hasTrailingReturn() const { return HasTrailingReturn; } 2979 2980 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 2981 2982 2983 /// \brief Retrieve the ref-qualifier associated with this function type. 2984 RefQualifierKind getRefQualifier() const { 2985 return static_cast<RefQualifierKind>(RefQualifier); 2986 } 2987 2988 typedef const QualType *arg_type_iterator; 2989 arg_type_iterator arg_type_begin() const { 2990 return reinterpret_cast<const QualType *>(this+1); 2991 } 2992 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 2993 2994 typedef const QualType *exception_iterator; 2995 exception_iterator exception_begin() const { 2996 // exceptions begin where arguments end 2997 return arg_type_end(); 2998 } 2999 exception_iterator exception_end() const { 3000 if (getExceptionSpecType() != EST_Dynamic) 3001 return exception_begin(); 3002 return exception_begin() + NumExceptions; 3003 } 3004 3005 bool hasAnyConsumedArgs() const { 3006 return HasAnyConsumedArgs; 3007 } 3008 bool isArgConsumed(unsigned I) const { 3009 assert(I < getNumArgs() && "argument index out of range!"); 3010 if (hasAnyConsumedArgs()) 3011 return getConsumedArgsBuffer()[I]; 3012 return false; 3013 } 3014 3015 bool isSugared() const { return false; } 3016 QualType desugar() const { return QualType(this, 0); } 3017 3018 void printExceptionSpecification(raw_ostream &OS, 3019 const PrintingPolicy &Policy) const; 3020 3021 static bool classof(const Type *T) { 3022 return T->getTypeClass() == FunctionProto; 3023 } 3024 3025 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx); 3026 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 3027 arg_type_iterator ArgTys, unsigned NumArgs, 3028 const ExtProtoInfo &EPI, const ASTContext &Context); 3029}; 3030 3031 3032/// \brief Represents the dependent type named by a dependently-scoped 3033/// typename using declaration, e.g. 3034/// using typename Base<T>::foo; 3035/// Template instantiation turns these into the underlying type. 3036class UnresolvedUsingType : public Type { 3037 UnresolvedUsingTypenameDecl *Decl; 3038 3039 UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) 3040 : Type(UnresolvedUsing, QualType(), true, true, false, 3041 /*ContainsUnexpandedParameterPack=*/false), 3042 Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} 3043 friend class ASTContext; // ASTContext creates these. 3044public: 3045 3046 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 3047 3048 bool isSugared() const { return false; } 3049 QualType desugar() const { return QualType(this, 0); } 3050 3051 static bool classof(const Type *T) { 3052 return T->getTypeClass() == UnresolvedUsing; 3053 } 3054 3055 void Profile(llvm::FoldingSetNodeID &ID) { 3056 return Profile(ID, Decl); 3057 } 3058 static void Profile(llvm::FoldingSetNodeID &ID, 3059 UnresolvedUsingTypenameDecl *D) { 3060 ID.AddPointer(D); 3061 } 3062}; 3063 3064 3065class TypedefType : public Type { 3066 TypedefNameDecl *Decl; 3067protected: 3068 TypedefType(TypeClass tc, const TypedefNameDecl *D, QualType can) 3069 : Type(tc, can, can->isDependentType(), 3070 can->isInstantiationDependentType(), 3071 can->isVariablyModifiedType(), 3072 /*ContainsUnexpandedParameterPack=*/false), 3073 Decl(const_cast<TypedefNameDecl*>(D)) { 3074 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 3075 } 3076 friend class ASTContext; // ASTContext creates these. 3077public: 3078 3079 TypedefNameDecl *getDecl() const { return Decl; } 3080 3081 bool isSugared() const { return true; } 3082 QualType desugar() const; 3083 3084 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 3085}; 3086 3087/// TypeOfExprType (GCC extension). 3088class TypeOfExprType : public Type { 3089 Expr *TOExpr; 3090 3091protected: 3092 TypeOfExprType(Expr *E, QualType can = QualType()); 3093 friend class ASTContext; // ASTContext creates these. 3094public: 3095 Expr *getUnderlyingExpr() const { return TOExpr; } 3096 3097 /// \brief Remove a single level of sugar. 3098 QualType desugar() const; 3099 3100 /// \brief Returns whether this type directly provides sugar. 3101 bool isSugared() const; 3102 3103 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 3104}; 3105 3106/// \brief Internal representation of canonical, dependent 3107/// typeof(expr) types. 3108/// 3109/// This class is used internally by the ASTContext to manage 3110/// canonical, dependent types, only. Clients will only see instances 3111/// of this class via TypeOfExprType nodes. 3112class DependentTypeOfExprType 3113 : public TypeOfExprType, public llvm::FoldingSetNode { 3114 const ASTContext &Context; 3115 3116public: 3117 DependentTypeOfExprType(const ASTContext &Context, Expr *E) 3118 : TypeOfExprType(E), Context(Context) { } 3119 3120 void Profile(llvm::FoldingSetNodeID &ID) { 3121 Profile(ID, Context, getUnderlyingExpr()); 3122 } 3123 3124 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 3125 Expr *E); 3126}; 3127 3128/// TypeOfType (GCC extension). 3129class TypeOfType : public Type { 3130 QualType TOType; 3131 TypeOfType(QualType T, QualType can) 3132 : Type(TypeOf, can, T->isDependentType(), 3133 T->isInstantiationDependentType(), 3134 T->isVariablyModifiedType(), 3135 T->containsUnexpandedParameterPack()), 3136 TOType(T) { 3137 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 3138 } 3139 friend class ASTContext; // ASTContext creates these. 3140public: 3141 QualType getUnderlyingType() const { return TOType; } 3142 3143 /// \brief Remove a single level of sugar. 3144 QualType desugar() const { return getUnderlyingType(); } 3145 3146 /// \brief Returns whether this type directly provides sugar. 3147 bool isSugared() const { return true; } 3148 3149 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 3150}; 3151 3152/// DecltypeType (C++0x) 3153class DecltypeType : public Type { 3154 Expr *E; 3155 QualType UnderlyingType; 3156 3157protected: 3158 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 3159 friend class ASTContext; // ASTContext creates these. 3160public: 3161 Expr *getUnderlyingExpr() const { return E; } 3162 QualType getUnderlyingType() const { return UnderlyingType; } 3163 3164 /// \brief Remove a single level of sugar. 3165 QualType desugar() const; 3166 3167 /// \brief Returns whether this type directly provides sugar. 3168 bool isSugared() const; 3169 3170 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 3171}; 3172 3173/// \brief Internal representation of canonical, dependent 3174/// decltype(expr) types. 3175/// 3176/// This class is used internally by the ASTContext to manage 3177/// canonical, dependent types, only. Clients will only see instances 3178/// of this class via DecltypeType nodes. 3179class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 3180 const ASTContext &Context; 3181 3182public: 3183 DependentDecltypeType(const ASTContext &Context, Expr *E); 3184 3185 void Profile(llvm::FoldingSetNodeID &ID) { 3186 Profile(ID, Context, getUnderlyingExpr()); 3187 } 3188 3189 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 3190 Expr *E); 3191}; 3192 3193/// \brief A unary type transform, which is a type constructed from another 3194class UnaryTransformType : public Type { 3195public: 3196 enum UTTKind { 3197 EnumUnderlyingType 3198 }; 3199 3200private: 3201 /// The untransformed type. 3202 QualType BaseType; 3203 /// The transformed type if not dependent, otherwise the same as BaseType. 3204 QualType UnderlyingType; 3205 3206 UTTKind UKind; 3207protected: 3208 UnaryTransformType(QualType BaseTy, QualType UnderlyingTy, UTTKind UKind, 3209 QualType CanonicalTy); 3210 friend class ASTContext; 3211public: 3212 bool isSugared() const { return !isDependentType(); } 3213 QualType desugar() const { return UnderlyingType; } 3214 3215 QualType getUnderlyingType() const { return UnderlyingType; } 3216 QualType getBaseType() const { return BaseType; } 3217 3218 UTTKind getUTTKind() const { return UKind; } 3219 3220 static bool classof(const Type *T) { 3221 return T->getTypeClass() == UnaryTransform; 3222 } 3223}; 3224 3225class TagType : public Type { 3226 /// Stores the TagDecl associated with this type. The decl may point to any 3227 /// TagDecl that declares the entity. 3228 TagDecl * decl; 3229 3230 friend class ASTReader; 3231 3232protected: 3233 TagType(TypeClass TC, const TagDecl *D, QualType can); 3234 3235public: 3236 TagDecl *getDecl() const; 3237 3238 /// @brief Determines whether this type is in the process of being 3239 /// defined. 3240 bool isBeingDefined() const; 3241 3242 static bool classof(const Type *T) { 3243 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 3244 } 3245}; 3246 3247/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 3248/// to detect TagType objects of structs/unions/classes. 3249class RecordType : public TagType { 3250protected: 3251 explicit RecordType(const RecordDecl *D) 3252 : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3253 explicit RecordType(TypeClass TC, RecordDecl *D) 3254 : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3255 friend class ASTContext; // ASTContext creates these. 3256public: 3257 3258 RecordDecl *getDecl() const { 3259 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 3260 } 3261 3262 // FIXME: This predicate is a helper to QualType/Type. It needs to 3263 // recursively check all fields for const-ness. If any field is declared 3264 // const, it needs to return false. 3265 bool hasConstFields() const { return false; } 3266 3267 bool isSugared() const { return false; } 3268 QualType desugar() const { return QualType(this, 0); } 3269 3270 static bool classof(const Type *T) { return T->getTypeClass() == Record; } 3271}; 3272 3273/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 3274/// to detect TagType objects of enums. 3275class EnumType : public TagType { 3276 explicit EnumType(const EnumDecl *D) 3277 : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3278 friend class ASTContext; // ASTContext creates these. 3279public: 3280 3281 EnumDecl *getDecl() const { 3282 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 3283 } 3284 3285 bool isSugared() const { return false; } 3286 QualType desugar() const { return QualType(this, 0); } 3287 3288 static bool classof(const Type *T) { return T->getTypeClass() == Enum; } 3289}; 3290 3291/// AttributedType - An attributed type is a type to which a type 3292/// attribute has been applied. The "modified type" is the 3293/// fully-sugared type to which the attributed type was applied; 3294/// generally it is not canonically equivalent to the attributed type. 3295/// The "equivalent type" is the minimally-desugared type which the 3296/// type is canonically equivalent to. 3297/// 3298/// For example, in the following attributed type: 3299/// int32_t __attribute__((vector_size(16))) 3300/// - the modified type is the TypedefType for int32_t 3301/// - the equivalent type is VectorType(16, int32_t) 3302/// - the canonical type is VectorType(16, int) 3303class AttributedType : public Type, public llvm::FoldingSetNode { 3304public: 3305 // It is really silly to have yet another attribute-kind enum, but 3306 // clang::attr::Kind doesn't currently cover the pure type attrs. 3307 enum Kind { 3308 // Expression operand. 3309 attr_address_space, 3310 attr_regparm, 3311 attr_vector_size, 3312 attr_neon_vector_type, 3313 attr_neon_polyvector_type, 3314 3315 FirstExprOperandKind = attr_address_space, 3316 LastExprOperandKind = attr_neon_polyvector_type, 3317 3318 // Enumerated operand (string or keyword). 3319 attr_objc_gc, 3320 attr_objc_ownership, 3321 attr_pcs, 3322 3323 FirstEnumOperandKind = attr_objc_gc, 3324 LastEnumOperandKind = attr_pcs, 3325 3326 // No operand. 3327 attr_noreturn, 3328 attr_cdecl, 3329 attr_fastcall, 3330 attr_stdcall, 3331 attr_thiscall, 3332 attr_pascal, 3333 attr_pnaclcall, 3334 attr_inteloclbicc 3335 }; 3336 3337private: 3338 QualType ModifiedType; 3339 QualType EquivalentType; 3340 3341 friend class ASTContext; // creates these 3342 3343 AttributedType(QualType canon, Kind attrKind, 3344 QualType modified, QualType equivalent) 3345 : Type(Attributed, canon, canon->isDependentType(), 3346 canon->isInstantiationDependentType(), 3347 canon->isVariablyModifiedType(), 3348 canon->containsUnexpandedParameterPack()), 3349 ModifiedType(modified), EquivalentType(equivalent) { 3350 AttributedTypeBits.AttrKind = attrKind; 3351 } 3352 3353public: 3354 Kind getAttrKind() const { 3355 return static_cast<Kind>(AttributedTypeBits.AttrKind); 3356 } 3357 3358 QualType getModifiedType() const { return ModifiedType; } 3359 QualType getEquivalentType() const { return EquivalentType; } 3360 3361 bool isSugared() const { return true; } 3362 QualType desugar() const { return getEquivalentType(); } 3363 3364 void Profile(llvm::FoldingSetNodeID &ID) { 3365 Profile(ID, getAttrKind(), ModifiedType, EquivalentType); 3366 } 3367 3368 static void Profile(llvm::FoldingSetNodeID &ID, Kind attrKind, 3369 QualType modified, QualType equivalent) { 3370 ID.AddInteger(attrKind); 3371 ID.AddPointer(modified.getAsOpaquePtr()); 3372 ID.AddPointer(equivalent.getAsOpaquePtr()); 3373 } 3374 3375 static bool classof(const Type *T) { 3376 return T->getTypeClass() == Attributed; 3377 } 3378}; 3379 3380class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 3381 // Helper data collector for canonical types. 3382 struct CanonicalTTPTInfo { 3383 unsigned Depth : 15; 3384 unsigned ParameterPack : 1; 3385 unsigned Index : 16; 3386 }; 3387 3388 union { 3389 // Info for the canonical type. 3390 CanonicalTTPTInfo CanTTPTInfo; 3391 // Info for the non-canonical type. 3392 TemplateTypeParmDecl *TTPDecl; 3393 }; 3394 3395 /// Build a non-canonical type. 3396 TemplateTypeParmType(TemplateTypeParmDecl *TTPDecl, QualType Canon) 3397 : Type(TemplateTypeParm, Canon, /*Dependent=*/true, 3398 /*InstantiationDependent=*/true, 3399 /*VariablyModified=*/false, 3400 Canon->containsUnexpandedParameterPack()), 3401 TTPDecl(TTPDecl) { } 3402 3403 /// Build the canonical type. 3404 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 3405 : Type(TemplateTypeParm, QualType(this, 0), 3406 /*Dependent=*/true, 3407 /*InstantiationDependent=*/true, 3408 /*VariablyModified=*/false, PP) { 3409 CanTTPTInfo.Depth = D; 3410 CanTTPTInfo.Index = I; 3411 CanTTPTInfo.ParameterPack = PP; 3412 } 3413 3414 friend class ASTContext; // ASTContext creates these 3415 3416 const CanonicalTTPTInfo& getCanTTPTInfo() const { 3417 QualType Can = getCanonicalTypeInternal(); 3418 return Can->castAs<TemplateTypeParmType>()->CanTTPTInfo; 3419 } 3420 3421public: 3422 unsigned getDepth() const { return getCanTTPTInfo().Depth; } 3423 unsigned getIndex() const { return getCanTTPTInfo().Index; } 3424 bool isParameterPack() const { return getCanTTPTInfo().ParameterPack; } 3425 3426 TemplateTypeParmDecl *getDecl() const { 3427 return isCanonicalUnqualified() ? 0 : TTPDecl; 3428 } 3429 3430 IdentifierInfo *getIdentifier() const; 3431 3432 bool isSugared() const { return false; } 3433 QualType desugar() const { return QualType(this, 0); } 3434 3435 void Profile(llvm::FoldingSetNodeID &ID) { 3436 Profile(ID, getDepth(), getIndex(), isParameterPack(), getDecl()); 3437 } 3438 3439 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 3440 unsigned Index, bool ParameterPack, 3441 TemplateTypeParmDecl *TTPDecl) { 3442 ID.AddInteger(Depth); 3443 ID.AddInteger(Index); 3444 ID.AddBoolean(ParameterPack); 3445 ID.AddPointer(TTPDecl); 3446 } 3447 3448 static bool classof(const Type *T) { 3449 return T->getTypeClass() == TemplateTypeParm; 3450 } 3451}; 3452 3453/// \brief Represents the result of substituting a type for a template 3454/// type parameter. 3455/// 3456/// Within an instantiated template, all template type parameters have 3457/// been replaced with these. They are used solely to record that a 3458/// type was originally written as a template type parameter; 3459/// therefore they are never canonical. 3460class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 3461 // The original type parameter. 3462 const TemplateTypeParmType *Replaced; 3463 3464 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 3465 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType(), 3466 Canon->isInstantiationDependentType(), 3467 Canon->isVariablyModifiedType(), 3468 Canon->containsUnexpandedParameterPack()), 3469 Replaced(Param) { } 3470 3471 friend class ASTContext; 3472 3473public: 3474 /// Gets the template parameter that was substituted for. 3475 const TemplateTypeParmType *getReplacedParameter() const { 3476 return Replaced; 3477 } 3478 3479 /// Gets the type that was substituted for the template 3480 /// parameter. 3481 QualType getReplacementType() const { 3482 return getCanonicalTypeInternal(); 3483 } 3484 3485 bool isSugared() const { return true; } 3486 QualType desugar() const { return getReplacementType(); } 3487 3488 void Profile(llvm::FoldingSetNodeID &ID) { 3489 Profile(ID, getReplacedParameter(), getReplacementType()); 3490 } 3491 static void Profile(llvm::FoldingSetNodeID &ID, 3492 const TemplateTypeParmType *Replaced, 3493 QualType Replacement) { 3494 ID.AddPointer(Replaced); 3495 ID.AddPointer(Replacement.getAsOpaquePtr()); 3496 } 3497 3498 static bool classof(const Type *T) { 3499 return T->getTypeClass() == SubstTemplateTypeParm; 3500 } 3501}; 3502 3503/// \brief Represents the result of substituting a set of types for a template 3504/// type parameter pack. 3505/// 3506/// When a pack expansion in the source code contains multiple parameter packs 3507/// and those parameter packs correspond to different levels of template 3508/// parameter lists, this type node is used to represent a template type 3509/// parameter pack from an outer level, which has already had its argument pack 3510/// substituted but that still lives within a pack expansion that itself 3511/// could not be instantiated. When actually performing a substitution into 3512/// that pack expansion (e.g., when all template parameters have corresponding 3513/// arguments), this type will be replaced with the \c SubstTemplateTypeParmType 3514/// at the current pack substitution index. 3515class SubstTemplateTypeParmPackType : public Type, public llvm::FoldingSetNode { 3516 /// \brief The original type parameter. 3517 const TemplateTypeParmType *Replaced; 3518 3519 /// \brief A pointer to the set of template arguments that this 3520 /// parameter pack is instantiated with. 3521 const TemplateArgument *Arguments; 3522 3523 /// \brief The number of template arguments in \c Arguments. 3524 unsigned NumArguments; 3525 3526 SubstTemplateTypeParmPackType(const TemplateTypeParmType *Param, 3527 QualType Canon, 3528 const TemplateArgument &ArgPack); 3529 3530 friend class ASTContext; 3531 3532public: 3533 IdentifierInfo *getIdentifier() const { return Replaced->getIdentifier(); } 3534 3535 /// Gets the template parameter that was substituted for. 3536 const TemplateTypeParmType *getReplacedParameter() const { 3537 return Replaced; 3538 } 3539 3540 bool isSugared() const { return false; } 3541 QualType desugar() const { return QualType(this, 0); } 3542 3543 TemplateArgument getArgumentPack() const; 3544 3545 void Profile(llvm::FoldingSetNodeID &ID); 3546 static void Profile(llvm::FoldingSetNodeID &ID, 3547 const TemplateTypeParmType *Replaced, 3548 const TemplateArgument &ArgPack); 3549 3550 static bool classof(const Type *T) { 3551 return T->getTypeClass() == SubstTemplateTypeParmPack; 3552 } 3553}; 3554 3555/// \brief Represents a C++11 auto or C++1y decltype(auto) type. 3556/// 3557/// These types are usually a placeholder for a deduced type. However, within 3558/// templates and before the initializer is attached, there is no deduced type 3559/// and an auto type is type-dependent and canonical. 3560class AutoType : public Type, public llvm::FoldingSetNode { 3561 AutoType(QualType DeducedType, bool IsDecltypeAuto) 3562 : Type(Auto, DeducedType.isNull() ? QualType(this, 0) : DeducedType, 3563 /*Dependent=*/DeducedType.isNull(), 3564 /*InstantiationDependent=*/DeducedType.isNull(), 3565 /*VariablyModified=*/false, /*ContainsParameterPack=*/false) { 3566 assert((DeducedType.isNull() || !DeducedType->isDependentType()) && 3567 "deduced a dependent type for auto"); 3568 AutoTypeBits.IsDecltypeAuto = IsDecltypeAuto; 3569 } 3570 3571 friend class ASTContext; // ASTContext creates these 3572 3573public: 3574 bool isDecltypeAuto() const { return AutoTypeBits.IsDecltypeAuto; } 3575 3576 bool isSugared() const { return isDeduced(); } 3577 QualType desugar() const { return getCanonicalTypeInternal(); } 3578 3579 QualType getDeducedType() const { 3580 return isDeduced() ? getCanonicalTypeInternal() : QualType(); 3581 } 3582 bool isDeduced() const { 3583 return !isDependentType(); 3584 } 3585 3586 void Profile(llvm::FoldingSetNodeID &ID) { 3587 Profile(ID, getDeducedType(), isDecltypeAuto()); 3588 } 3589 3590 static void Profile(llvm::FoldingSetNodeID &ID, 3591 QualType Deduced, bool IsDecltypeAuto) { 3592 ID.AddPointer(Deduced.getAsOpaquePtr()); 3593 ID.AddBoolean(IsDecltypeAuto); 3594 } 3595 3596 static bool classof(const Type *T) { 3597 return T->getTypeClass() == Auto; 3598 } 3599}; 3600 3601/// \brief Represents a type template specialization; the template 3602/// must be a class template, a type alias template, or a template 3603/// template parameter. A template which cannot be resolved to one of 3604/// these, e.g. because it is written with a dependent scope 3605/// specifier, is instead represented as a 3606/// @c DependentTemplateSpecializationType. 3607/// 3608/// A non-dependent template specialization type is always "sugar", 3609/// typically for a @c RecordType. For example, a class template 3610/// specialization type of @c vector<int> will refer to a tag type for 3611/// the instantiation @c std::vector<int, std::allocator<int>> 3612/// 3613/// Template specializations are dependent if either the template or 3614/// any of the template arguments are dependent, in which case the 3615/// type may also be canonical. 3616/// 3617/// Instances of this type are allocated with a trailing array of 3618/// TemplateArguments, followed by a QualType representing the 3619/// non-canonical aliased type when the template is a type alias 3620/// template. 3621class TemplateSpecializationType 3622 : public Type, public llvm::FoldingSetNode { 3623 /// \brief The name of the template being specialized. This is 3624 /// either a TemplateName::Template (in which case it is a 3625 /// ClassTemplateDecl*, a TemplateTemplateParmDecl*, or a 3626 /// TypeAliasTemplateDecl*), a 3627 /// TemplateName::SubstTemplateTemplateParmPack, or a 3628 /// TemplateName::SubstTemplateTemplateParm (in which case the 3629 /// replacement must, recursively, be one of these). 3630 TemplateName Template; 3631 3632 /// \brief - The number of template arguments named in this class 3633 /// template specialization. 3634 unsigned NumArgs : 31; 3635 3636 /// \brief Whether this template specialization type is a substituted 3637 /// type alias. 3638 bool TypeAlias : 1; 3639 3640 TemplateSpecializationType(TemplateName T, 3641 const TemplateArgument *Args, 3642 unsigned NumArgs, QualType Canon, 3643 QualType Aliased); 3644 3645 friend class ASTContext; // ASTContext creates these 3646 3647public: 3648 /// \brief Determine whether any of the given template arguments are 3649 /// dependent. 3650 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 3651 unsigned NumArgs, 3652 bool &InstantiationDependent); 3653 3654 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 3655 unsigned NumArgs, 3656 bool &InstantiationDependent); 3657 3658 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &, 3659 bool &InstantiationDependent); 3660 3661 /// \brief Print a template argument list, including the '<' and '>' 3662 /// enclosing the template arguments. 3663 static void PrintTemplateArgumentList(raw_ostream &OS, 3664 const TemplateArgument *Args, 3665 unsigned NumArgs, 3666 const PrintingPolicy &Policy, 3667 bool SkipBrackets = false); 3668 3669 static void PrintTemplateArgumentList(raw_ostream &OS, 3670 const TemplateArgumentLoc *Args, 3671 unsigned NumArgs, 3672 const PrintingPolicy &Policy); 3673 3674 static void PrintTemplateArgumentList(raw_ostream &OS, 3675 const TemplateArgumentListInfo &, 3676 const PrintingPolicy &Policy); 3677 3678 /// True if this template specialization type matches a current 3679 /// instantiation in the context in which it is found. 3680 bool isCurrentInstantiation() const { 3681 return isa<InjectedClassNameType>(getCanonicalTypeInternal()); 3682 } 3683 3684 /// \brief Determine if this template specialization type is for a type alias 3685 /// template that has been substituted. 3686 /// 3687 /// Nearly every template specialization type whose template is an alias 3688 /// template will be substituted. However, this is not the case when 3689 /// the specialization contains a pack expansion but the template alias 3690 /// does not have a corresponding parameter pack, e.g., 3691 /// 3692 /// \code 3693 /// template<typename T, typename U, typename V> struct S; 3694 /// template<typename T, typename U> using A = S<T, int, U>; 3695 /// template<typename... Ts> struct X { 3696 /// typedef A<Ts...> type; // not a type alias 3697 /// }; 3698 /// \endcode 3699 bool isTypeAlias() const { return TypeAlias; } 3700 3701 /// Get the aliased type, if this is a specialization of a type alias 3702 /// template. 3703 QualType getAliasedType() const { 3704 assert(isTypeAlias() && "not a type alias template specialization"); 3705 return *reinterpret_cast<const QualType*>(end()); 3706 } 3707 3708 typedef const TemplateArgument * iterator; 3709 3710 iterator begin() const { return getArgs(); } 3711 iterator end() const; // defined inline in TemplateBase.h 3712 3713 /// \brief Retrieve the name of the template that we are specializing. 3714 TemplateName getTemplateName() const { return Template; } 3715 3716 /// \brief Retrieve the template arguments. 3717 const TemplateArgument *getArgs() const { 3718 return reinterpret_cast<const TemplateArgument *>(this + 1); 3719 } 3720 3721 /// \brief Retrieve the number of template arguments. 3722 unsigned getNumArgs() const { return NumArgs; } 3723 3724 /// \brief Retrieve a specific template argument as a type. 3725 /// \pre @c isArgType(Arg) 3726 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 3727 3728 bool isSugared() const { 3729 return !isDependentType() || isCurrentInstantiation() || isTypeAlias(); 3730 } 3731 QualType desugar() const { return getCanonicalTypeInternal(); } 3732 3733 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) { 3734 Profile(ID, Template, getArgs(), NumArgs, Ctx); 3735 if (isTypeAlias()) 3736 getAliasedType().Profile(ID); 3737 } 3738 3739 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 3740 const TemplateArgument *Args, 3741 unsigned NumArgs, 3742 const ASTContext &Context); 3743 3744 static bool classof(const Type *T) { 3745 return T->getTypeClass() == TemplateSpecialization; 3746 } 3747}; 3748 3749/// \brief The injected class name of a C++ class template or class 3750/// template partial specialization. Used to record that a type was 3751/// spelled with a bare identifier rather than as a template-id; the 3752/// equivalent for non-templated classes is just RecordType. 3753/// 3754/// Injected class name types are always dependent. Template 3755/// instantiation turns these into RecordTypes. 3756/// 3757/// Injected class name types are always canonical. This works 3758/// because it is impossible to compare an injected class name type 3759/// with the corresponding non-injected template type, for the same 3760/// reason that it is impossible to directly compare template 3761/// parameters from different dependent contexts: injected class name 3762/// types can only occur within the scope of a particular templated 3763/// declaration, and within that scope every template specialization 3764/// will canonicalize to the injected class name (when appropriate 3765/// according to the rules of the language). 3766class InjectedClassNameType : public Type { 3767 CXXRecordDecl *Decl; 3768 3769 /// The template specialization which this type represents. 3770 /// For example, in 3771 /// template <class T> class A { ... }; 3772 /// this is A<T>, whereas in 3773 /// template <class X, class Y> class A<B<X,Y> > { ... }; 3774 /// this is A<B<X,Y> >. 3775 /// 3776 /// It is always unqualified, always a template specialization type, 3777 /// and always dependent. 3778 QualType InjectedType; 3779 3780 friend class ASTContext; // ASTContext creates these. 3781 friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not 3782 // currently suitable for AST reading, too much 3783 // interdependencies. 3784 InjectedClassNameType(CXXRecordDecl *D, QualType TST) 3785 : Type(InjectedClassName, QualType(), /*Dependent=*/true, 3786 /*InstantiationDependent=*/true, 3787 /*VariablyModified=*/false, 3788 /*ContainsUnexpandedParameterPack=*/false), 3789 Decl(D), InjectedType(TST) { 3790 assert(isa<TemplateSpecializationType>(TST)); 3791 assert(!TST.hasQualifiers()); 3792 assert(TST->isDependentType()); 3793 } 3794 3795public: 3796 QualType getInjectedSpecializationType() const { return InjectedType; } 3797 const TemplateSpecializationType *getInjectedTST() const { 3798 return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); 3799 } 3800 3801 CXXRecordDecl *getDecl() const; 3802 3803 bool isSugared() const { return false; } 3804 QualType desugar() const { return QualType(this, 0); } 3805 3806 static bool classof(const Type *T) { 3807 return T->getTypeClass() == InjectedClassName; 3808 } 3809}; 3810 3811/// \brief The kind of a tag type. 3812enum TagTypeKind { 3813 /// \brief The "struct" keyword. 3814 TTK_Struct, 3815 /// \brief The "__interface" keyword. 3816 TTK_Interface, 3817 /// \brief The "union" keyword. 3818 TTK_Union, 3819 /// \brief The "class" keyword. 3820 TTK_Class, 3821 /// \brief The "enum" keyword. 3822 TTK_Enum 3823}; 3824 3825/// \brief The elaboration keyword that precedes a qualified type name or 3826/// introduces an elaborated-type-specifier. 3827enum ElaboratedTypeKeyword { 3828 /// \brief The "struct" keyword introduces the elaborated-type-specifier. 3829 ETK_Struct, 3830 /// \brief The "__interface" keyword introduces the elaborated-type-specifier. 3831 ETK_Interface, 3832 /// \brief The "union" keyword introduces the elaborated-type-specifier. 3833 ETK_Union, 3834 /// \brief The "class" keyword introduces the elaborated-type-specifier. 3835 ETK_Class, 3836 /// \brief The "enum" keyword introduces the elaborated-type-specifier. 3837 ETK_Enum, 3838 /// \brief The "typename" keyword precedes the qualified type name, e.g., 3839 /// \c typename T::type. 3840 ETK_Typename, 3841 /// \brief No keyword precedes the qualified type name. 3842 ETK_None 3843}; 3844 3845/// A helper class for Type nodes having an ElaboratedTypeKeyword. 3846/// The keyword in stored in the free bits of the base class. 3847/// Also provides a few static helpers for converting and printing 3848/// elaborated type keyword and tag type kind enumerations. 3849class TypeWithKeyword : public Type { 3850protected: 3851 TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, 3852 QualType Canonical, bool Dependent, 3853 bool InstantiationDependent, bool VariablyModified, 3854 bool ContainsUnexpandedParameterPack) 3855 : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified, 3856 ContainsUnexpandedParameterPack) { 3857 TypeWithKeywordBits.Keyword = Keyword; 3858 } 3859 3860public: 3861 ElaboratedTypeKeyword getKeyword() const { 3862 return static_cast<ElaboratedTypeKeyword>(TypeWithKeywordBits.Keyword); 3863 } 3864 3865 /// getKeywordForTypeSpec - Converts a type specifier (DeclSpec::TST) 3866 /// into an elaborated type keyword. 3867 static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); 3868 3869 /// getTagTypeKindForTypeSpec - Converts a type specifier (DeclSpec::TST) 3870 /// into a tag type kind. It is an error to provide a type specifier 3871 /// which *isn't* a tag kind here. 3872 static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); 3873 3874 /// getKeywordForTagDeclKind - Converts a TagTypeKind into an 3875 /// elaborated type keyword. 3876 static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); 3877 3878 /// getTagTypeKindForKeyword - Converts an elaborated type keyword into 3879 // a TagTypeKind. It is an error to provide an elaborated type keyword 3880 /// which *isn't* a tag kind here. 3881 static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); 3882 3883 static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); 3884 3885 static const char *getKeywordName(ElaboratedTypeKeyword Keyword); 3886 3887 static const char *getTagTypeKindName(TagTypeKind Kind) { 3888 return getKeywordName(getKeywordForTagTypeKind(Kind)); 3889 } 3890 3891 class CannotCastToThisType {}; 3892 static CannotCastToThisType classof(const Type *); 3893}; 3894 3895/// \brief Represents a type that was referred to using an elaborated type 3896/// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, 3897/// or both. 3898/// 3899/// This type is used to keep track of a type name as written in the 3900/// source code, including tag keywords and any nested-name-specifiers. 3901/// The type itself is always "sugar", used to express what was written 3902/// in the source code but containing no additional semantic information. 3903class ElaboratedType : public TypeWithKeyword, public llvm::FoldingSetNode { 3904 3905 /// \brief The nested name specifier containing the qualifier. 3906 NestedNameSpecifier *NNS; 3907 3908 /// \brief The type that this qualified name refers to. 3909 QualType NamedType; 3910 3911 ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3912 QualType NamedType, QualType CanonType) 3913 : TypeWithKeyword(Keyword, Elaborated, CanonType, 3914 NamedType->isDependentType(), 3915 NamedType->isInstantiationDependentType(), 3916 NamedType->isVariablyModifiedType(), 3917 NamedType->containsUnexpandedParameterPack()), 3918 NNS(NNS), NamedType(NamedType) { 3919 assert(!(Keyword == ETK_None && NNS == 0) && 3920 "ElaboratedType cannot have elaborated type keyword " 3921 "and name qualifier both null."); 3922 } 3923 3924 friend class ASTContext; // ASTContext creates these 3925 3926public: 3927 ~ElaboratedType(); 3928 3929 /// \brief Retrieve the qualification on this type. 3930 NestedNameSpecifier *getQualifier() const { return NNS; } 3931 3932 /// \brief Retrieve the type named by the qualified-id. 3933 QualType getNamedType() const { return NamedType; } 3934 3935 /// \brief Remove a single level of sugar. 3936 QualType desugar() const { return getNamedType(); } 3937 3938 /// \brief Returns whether this type directly provides sugar. 3939 bool isSugared() const { return true; } 3940 3941 void Profile(llvm::FoldingSetNodeID &ID) { 3942 Profile(ID, getKeyword(), NNS, NamedType); 3943 } 3944 3945 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3946 NestedNameSpecifier *NNS, QualType NamedType) { 3947 ID.AddInteger(Keyword); 3948 ID.AddPointer(NNS); 3949 NamedType.Profile(ID); 3950 } 3951 3952 static bool classof(const Type *T) { 3953 return T->getTypeClass() == Elaborated; 3954 } 3955}; 3956 3957/// \brief Represents a qualified type name for which the type name is 3958/// dependent. 3959/// 3960/// DependentNameType represents a class of dependent types that involve a 3961/// dependent nested-name-specifier (e.g., "T::") followed by a (dependent) 3962/// name of a type. The DependentNameType may start with a "typename" (for a 3963/// typename-specifier), "class", "struct", "union", or "enum" (for a 3964/// dependent elaborated-type-specifier), or nothing (in contexts where we 3965/// know that we must be referring to a type, e.g., in a base class specifier). 3966class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { 3967 3968 /// \brief The nested name specifier containing the qualifier. 3969 NestedNameSpecifier *NNS; 3970 3971 /// \brief The type that this typename specifier refers to. 3972 const IdentifierInfo *Name; 3973 3974 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3975 const IdentifierInfo *Name, QualType CanonType) 3976 : TypeWithKeyword(Keyword, DependentName, CanonType, /*Dependent=*/true, 3977 /*InstantiationDependent=*/true, 3978 /*VariablyModified=*/false, 3979 NNS->containsUnexpandedParameterPack()), 3980 NNS(NNS), Name(Name) { 3981 assert(NNS->isDependent() && 3982 "DependentNameType requires a dependent nested-name-specifier"); 3983 } 3984 3985 friend class ASTContext; // ASTContext creates these 3986 3987public: 3988 /// \brief Retrieve the qualification on this type. 3989 NestedNameSpecifier *getQualifier() const { return NNS; } 3990 3991 /// \brief Retrieve the type named by the typename specifier as an 3992 /// identifier. 3993 /// 3994 /// This routine will return a non-NULL identifier pointer when the 3995 /// form of the original typename was terminated by an identifier, 3996 /// e.g., "typename T::type". 3997 const IdentifierInfo *getIdentifier() const { 3998 return Name; 3999 } 4000 4001 bool isSugared() const { return false; } 4002 QualType desugar() const { return QualType(this, 0); } 4003 4004 void Profile(llvm::FoldingSetNodeID &ID) { 4005 Profile(ID, getKeyword(), NNS, Name); 4006 } 4007 4008 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 4009 NestedNameSpecifier *NNS, const IdentifierInfo *Name) { 4010 ID.AddInteger(Keyword); 4011 ID.AddPointer(NNS); 4012 ID.AddPointer(Name); 4013 } 4014 4015 static bool classof(const Type *T) { 4016 return T->getTypeClass() == DependentName; 4017 } 4018}; 4019 4020/// DependentTemplateSpecializationType - Represents a template 4021/// specialization type whose template cannot be resolved, e.g. 4022/// A<T>::template B<T> 4023class DependentTemplateSpecializationType : 4024 public TypeWithKeyword, public llvm::FoldingSetNode { 4025 4026 /// \brief The nested name specifier containing the qualifier. 4027 NestedNameSpecifier *NNS; 4028 4029 /// \brief The identifier of the template. 4030 const IdentifierInfo *Name; 4031 4032 /// \brief - The number of template arguments named in this class 4033 /// template specialization. 4034 unsigned NumArgs; 4035 4036 const TemplateArgument *getArgBuffer() const { 4037 return reinterpret_cast<const TemplateArgument*>(this+1); 4038 } 4039 TemplateArgument *getArgBuffer() { 4040 return reinterpret_cast<TemplateArgument*>(this+1); 4041 } 4042 4043 DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 4044 NestedNameSpecifier *NNS, 4045 const IdentifierInfo *Name, 4046 unsigned NumArgs, 4047 const TemplateArgument *Args, 4048 QualType Canon); 4049 4050 friend class ASTContext; // ASTContext creates these 4051 4052public: 4053 NestedNameSpecifier *getQualifier() const { return NNS; } 4054 const IdentifierInfo *getIdentifier() const { return Name; } 4055 4056 /// \brief Retrieve the template arguments. 4057 const TemplateArgument *getArgs() const { 4058 return getArgBuffer(); 4059 } 4060 4061 /// \brief Retrieve the number of template arguments. 4062 unsigned getNumArgs() const { return NumArgs; } 4063 4064 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 4065 4066 typedef const TemplateArgument * iterator; 4067 iterator begin() const { return getArgs(); } 4068 iterator end() const; // inline in TemplateBase.h 4069 4070 bool isSugared() const { return false; } 4071 QualType desugar() const { return QualType(this, 0); } 4072 4073 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) { 4074 Profile(ID, Context, getKeyword(), NNS, Name, NumArgs, getArgs()); 4075 } 4076 4077 static void Profile(llvm::FoldingSetNodeID &ID, 4078 const ASTContext &Context, 4079 ElaboratedTypeKeyword Keyword, 4080 NestedNameSpecifier *Qualifier, 4081 const IdentifierInfo *Name, 4082 unsigned NumArgs, 4083 const TemplateArgument *Args); 4084 4085 static bool classof(const Type *T) { 4086 return T->getTypeClass() == DependentTemplateSpecialization; 4087 } 4088}; 4089 4090/// \brief Represents a pack expansion of types. 4091/// 4092/// Pack expansions are part of C++0x variadic templates. A pack 4093/// expansion contains a pattern, which itself contains one or more 4094/// "unexpanded" parameter packs. When instantiated, a pack expansion 4095/// produces a series of types, each instantiated from the pattern of 4096/// the expansion, where the Ith instantiation of the pattern uses the 4097/// Ith arguments bound to each of the unexpanded parameter packs. The 4098/// pack expansion is considered to "expand" these unexpanded 4099/// parameter packs. 4100/// 4101/// \code 4102/// template<typename ...Types> struct tuple; 4103/// 4104/// template<typename ...Types> 4105/// struct tuple_of_references { 4106/// typedef tuple<Types&...> type; 4107/// }; 4108/// \endcode 4109/// 4110/// Here, the pack expansion \c Types&... is represented via a 4111/// PackExpansionType whose pattern is Types&. 4112class PackExpansionType : public Type, public llvm::FoldingSetNode { 4113 /// \brief The pattern of the pack expansion. 4114 QualType Pattern; 4115 4116 /// \brief The number of expansions that this pack expansion will 4117 /// generate when substituted (+1), or indicates that 4118 /// 4119 /// This field will only have a non-zero value when some of the parameter 4120 /// packs that occur within the pattern have been substituted but others have 4121 /// not. 4122 unsigned NumExpansions; 4123 4124 PackExpansionType(QualType Pattern, QualType Canon, 4125 Optional<unsigned> NumExpansions) 4126 : Type(PackExpansion, Canon, /*Dependent=*/Pattern->isDependentType(), 4127 /*InstantiationDependent=*/true, 4128 /*VariableModified=*/Pattern->isVariablyModifiedType(), 4129 /*ContainsUnexpandedParameterPack=*/false), 4130 Pattern(Pattern), 4131 NumExpansions(NumExpansions? *NumExpansions + 1: 0) { } 4132 4133 friend class ASTContext; // ASTContext creates these 4134 4135public: 4136 /// \brief Retrieve the pattern of this pack expansion, which is the 4137 /// type that will be repeatedly instantiated when instantiating the 4138 /// pack expansion itself. 4139 QualType getPattern() const { return Pattern; } 4140 4141 /// \brief Retrieve the number of expansions that this pack expansion will 4142 /// generate, if known. 4143 Optional<unsigned> getNumExpansions() const { 4144 if (NumExpansions) 4145 return NumExpansions - 1; 4146 4147 return None; 4148 } 4149 4150 bool isSugared() const { return false; } 4151 QualType desugar() const { return QualType(this, 0); } 4152 4153 void Profile(llvm::FoldingSetNodeID &ID) { 4154 Profile(ID, getPattern(), getNumExpansions()); 4155 } 4156 4157 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pattern, 4158 Optional<unsigned> NumExpansions) { 4159 ID.AddPointer(Pattern.getAsOpaquePtr()); 4160 ID.AddBoolean(NumExpansions.hasValue()); 4161 if (NumExpansions) 4162 ID.AddInteger(*NumExpansions); 4163 } 4164 4165 static bool classof(const Type *T) { 4166 return T->getTypeClass() == PackExpansion; 4167 } 4168}; 4169 4170/// ObjCObjectType - Represents a class type in Objective C. 4171/// Every Objective C type is a combination of a base type and a 4172/// list of protocols. 4173/// 4174/// Given the following declarations: 4175/// \code 4176/// \@class C; 4177/// \@protocol P; 4178/// \endcode 4179/// 4180/// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType 4181/// with base C and no protocols. 4182/// 4183/// 'C<P>' is an ObjCObjectType with base C and protocol list [P]. 4184/// 4185/// 'id' is a TypedefType which is sugar for an ObjCPointerType whose 4186/// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType 4187/// and no protocols. 4188/// 4189/// 'id<P>' is an ObjCPointerType whose pointee is an ObjCObjecType 4190/// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually 4191/// this should get its own sugar class to better represent the source. 4192class ObjCObjectType : public Type { 4193 // ObjCObjectType.NumProtocols - the number of protocols stored 4194 // after the ObjCObjectPointerType node. 4195 // 4196 // These protocols are those written directly on the type. If 4197 // protocol qualifiers ever become additive, the iterators will need 4198 // to get kindof complicated. 4199 // 4200 // In the canonical object type, these are sorted alphabetically 4201 // and uniqued. 4202 4203 /// Either a BuiltinType or an InterfaceType or sugar for either. 4204 QualType BaseType; 4205 4206 ObjCProtocolDecl * const *getProtocolStorage() const { 4207 return const_cast<ObjCObjectType*>(this)->getProtocolStorage(); 4208 } 4209 4210 ObjCProtocolDecl **getProtocolStorage(); 4211 4212protected: 4213 ObjCObjectType(QualType Canonical, QualType Base, 4214 ObjCProtocolDecl * const *Protocols, unsigned NumProtocols); 4215 4216 enum Nonce_ObjCInterface { Nonce_ObjCInterface }; 4217 ObjCObjectType(enum Nonce_ObjCInterface) 4218 : Type(ObjCInterface, QualType(), false, false, false, false), 4219 BaseType(QualType(this_(), 0)) { 4220 ObjCObjectTypeBits.NumProtocols = 0; 4221 } 4222 4223public: 4224 /// getBaseType - Gets the base type of this object type. This is 4225 /// always (possibly sugar for) one of: 4226 /// - the 'id' builtin type (as opposed to the 'id' type visible to the 4227 /// user, which is a typedef for an ObjCPointerType) 4228 /// - the 'Class' builtin type (same caveat) 4229 /// - an ObjCObjectType (currently always an ObjCInterfaceType) 4230 QualType getBaseType() const { return BaseType; } 4231 4232 bool isObjCId() const { 4233 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); 4234 } 4235 bool isObjCClass() const { 4236 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); 4237 } 4238 bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } 4239 bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } 4240 bool isObjCUnqualifiedIdOrClass() const { 4241 if (!qual_empty()) return false; 4242 if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) 4243 return T->getKind() == BuiltinType::ObjCId || 4244 T->getKind() == BuiltinType::ObjCClass; 4245 return false; 4246 } 4247 bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } 4248 bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } 4249 4250 /// Gets the interface declaration for this object type, if the base type 4251 /// really is an interface. 4252 ObjCInterfaceDecl *getInterface() const; 4253 4254 typedef ObjCProtocolDecl * const *qual_iterator; 4255 4256 qual_iterator qual_begin() const { return getProtocolStorage(); } 4257 qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } 4258 4259 bool qual_empty() const { return getNumProtocols() == 0; } 4260 4261 /// getNumProtocols - Return the number of qualifying protocols in this 4262 /// interface type, or 0 if there are none. 4263 unsigned getNumProtocols() const { return ObjCObjectTypeBits.NumProtocols; } 4264 4265 /// \brief Fetch a protocol by index. 4266 ObjCProtocolDecl *getProtocol(unsigned I) const { 4267 assert(I < getNumProtocols() && "Out-of-range protocol access"); 4268 return qual_begin()[I]; 4269 } 4270 4271 bool isSugared() const { return false; } 4272 QualType desugar() const { return QualType(this, 0); } 4273 4274 static bool classof(const Type *T) { 4275 return T->getTypeClass() == ObjCObject || 4276 T->getTypeClass() == ObjCInterface; 4277 } 4278}; 4279 4280/// ObjCObjectTypeImpl - A class providing a concrete implementation 4281/// of ObjCObjectType, so as to not increase the footprint of 4282/// ObjCInterfaceType. Code outside of ASTContext and the core type 4283/// system should not reference this type. 4284class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { 4285 friend class ASTContext; 4286 4287 // If anyone adds fields here, ObjCObjectType::getProtocolStorage() 4288 // will need to be modified. 4289 4290 ObjCObjectTypeImpl(QualType Canonical, QualType Base, 4291 ObjCProtocolDecl * const *Protocols, 4292 unsigned NumProtocols) 4293 : ObjCObjectType(Canonical, Base, Protocols, NumProtocols) {} 4294 4295public: 4296 void Profile(llvm::FoldingSetNodeID &ID); 4297 static void Profile(llvm::FoldingSetNodeID &ID, 4298 QualType Base, 4299 ObjCProtocolDecl *const *protocols, 4300 unsigned NumProtocols); 4301}; 4302 4303inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorage() { 4304 return reinterpret_cast<ObjCProtocolDecl**>( 4305 static_cast<ObjCObjectTypeImpl*>(this) + 1); 4306} 4307 4308/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 4309/// object oriented design. They basically correspond to C++ classes. There 4310/// are two kinds of interface types, normal interfaces like "NSString" and 4311/// qualified interfaces, which are qualified with a protocol list like 4312/// "NSString<NSCopyable, NSAmazing>". 4313/// 4314/// ObjCInterfaceType guarantees the following properties when considered 4315/// as a subtype of its superclass, ObjCObjectType: 4316/// - There are no protocol qualifiers. To reinforce this, code which 4317/// tries to invoke the protocol methods via an ObjCInterfaceType will 4318/// fail to compile. 4319/// - It is its own base type. That is, if T is an ObjCInterfaceType*, 4320/// T->getBaseType() == QualType(T, 0). 4321class ObjCInterfaceType : public ObjCObjectType { 4322 mutable ObjCInterfaceDecl *Decl; 4323 4324 ObjCInterfaceType(const ObjCInterfaceDecl *D) 4325 : ObjCObjectType(Nonce_ObjCInterface), 4326 Decl(const_cast<ObjCInterfaceDecl*>(D)) {} 4327 friend class ASTContext; // ASTContext creates these. 4328 friend class ASTReader; 4329 friend class ObjCInterfaceDecl; 4330 4331public: 4332 /// getDecl - Get the declaration of this interface. 4333 ObjCInterfaceDecl *getDecl() const { return Decl; } 4334 4335 bool isSugared() const { return false; } 4336 QualType desugar() const { return QualType(this, 0); } 4337 4338 static bool classof(const Type *T) { 4339 return T->getTypeClass() == ObjCInterface; 4340 } 4341 4342 // Nonsense to "hide" certain members of ObjCObjectType within this 4343 // class. People asking for protocols on an ObjCInterfaceType are 4344 // not going to get what they want: ObjCInterfaceTypes are 4345 // guaranteed to have no protocols. 4346 enum { 4347 qual_iterator, 4348 qual_begin, 4349 qual_end, 4350 getNumProtocols, 4351 getProtocol 4352 }; 4353}; 4354 4355inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { 4356 if (const ObjCInterfaceType *T = 4357 getBaseType()->getAs<ObjCInterfaceType>()) 4358 return T->getDecl(); 4359 return 0; 4360} 4361 4362/// ObjCObjectPointerType - Used to represent a pointer to an 4363/// Objective C object. These are constructed from pointer 4364/// declarators when the pointee type is an ObjCObjectType (or sugar 4365/// for one). In addition, the 'id' and 'Class' types are typedefs 4366/// for these, and the protocol-qualified types 'id<P>' and 'Class<P>' 4367/// are translated into these. 4368/// 4369/// Pointers to pointers to Objective C objects are still PointerTypes; 4370/// only the first level of pointer gets it own type implementation. 4371class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 4372 QualType PointeeType; 4373 4374 ObjCObjectPointerType(QualType Canonical, QualType Pointee) 4375 : Type(ObjCObjectPointer, Canonical, false, false, false, false), 4376 PointeeType(Pointee) {} 4377 friend class ASTContext; // ASTContext creates these. 4378 4379public: 4380 /// getPointeeType - Gets the type pointed to by this ObjC pointer. 4381 /// The result will always be an ObjCObjectType or sugar thereof. 4382 QualType getPointeeType() const { return PointeeType; } 4383 4384 /// getObjCObjectType - Gets the type pointed to by this ObjC 4385 /// pointer. This method always returns non-null. 4386 /// 4387 /// This method is equivalent to getPointeeType() except that 4388 /// it discards any typedefs (or other sugar) between this 4389 /// type and the "outermost" object type. So for: 4390 /// \code 4391 /// \@class A; \@protocol P; \@protocol Q; 4392 /// typedef A<P> AP; 4393 /// typedef A A1; 4394 /// typedef A1<P> A1P; 4395 /// typedef A1P<Q> A1PQ; 4396 /// \endcode 4397 /// For 'A*', getObjectType() will return 'A'. 4398 /// For 'A<P>*', getObjectType() will return 'A<P>'. 4399 /// For 'AP*', getObjectType() will return 'A<P>'. 4400 /// For 'A1*', getObjectType() will return 'A'. 4401 /// For 'A1<P>*', getObjectType() will return 'A1<P>'. 4402 /// For 'A1P*', getObjectType() will return 'A1<P>'. 4403 /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because 4404 /// adding protocols to a protocol-qualified base discards the 4405 /// old qualifiers (for now). But if it didn't, getObjectType() 4406 /// would return 'A1P<Q>' (and we'd have to make iterating over 4407 /// qualifiers more complicated). 4408 const ObjCObjectType *getObjectType() const { 4409 return PointeeType->castAs<ObjCObjectType>(); 4410 } 4411 4412 /// getInterfaceType - If this pointer points to an Objective C 4413 /// \@interface type, gets the type for that interface. Any protocol 4414 /// qualifiers on the interface are ignored. 4415 /// 4416 /// \return null if the base type for this pointer is 'id' or 'Class' 4417 const ObjCInterfaceType *getInterfaceType() const { 4418 return getObjectType()->getBaseType()->getAs<ObjCInterfaceType>(); 4419 } 4420 4421 /// getInterfaceDecl - If this pointer points to an Objective \@interface 4422 /// type, gets the declaration for that interface. 4423 /// 4424 /// \return null if the base type for this pointer is 'id' or 'Class' 4425 ObjCInterfaceDecl *getInterfaceDecl() const { 4426 return getObjectType()->getInterface(); 4427 } 4428 4429 /// isObjCIdType - True if this is equivalent to the 'id' type, i.e. if 4430 /// its object type is the primitive 'id' type with no protocols. 4431 bool isObjCIdType() const { 4432 return getObjectType()->isObjCUnqualifiedId(); 4433 } 4434 4435 /// isObjCClassType - True if this is equivalent to the 'Class' type, 4436 /// i.e. if its object tive is the primitive 'Class' type with no protocols. 4437 bool isObjCClassType() const { 4438 return getObjectType()->isObjCUnqualifiedClass(); 4439 } 4440 4441 /// isObjCQualifiedIdType - True if this is equivalent to 'id<P>' for some 4442 /// non-empty set of protocols. 4443 bool isObjCQualifiedIdType() const { 4444 return getObjectType()->isObjCQualifiedId(); 4445 } 4446 4447 /// isObjCQualifiedClassType - True if this is equivalent to 'Class<P>' for 4448 /// some non-empty set of protocols. 4449 bool isObjCQualifiedClassType() const { 4450 return getObjectType()->isObjCQualifiedClass(); 4451 } 4452 4453 /// An iterator over the qualifiers on the object type. Provided 4454 /// for convenience. This will always iterate over the full set of 4455 /// protocols on a type, not just those provided directly. 4456 typedef ObjCObjectType::qual_iterator qual_iterator; 4457 4458 qual_iterator qual_begin() const { 4459 return getObjectType()->qual_begin(); 4460 } 4461 qual_iterator qual_end() const { 4462 return getObjectType()->qual_end(); 4463 } 4464 bool qual_empty() const { return getObjectType()->qual_empty(); } 4465 4466 /// getNumProtocols - Return the number of qualifying protocols on 4467 /// the object type. 4468 unsigned getNumProtocols() const { 4469 return getObjectType()->getNumProtocols(); 4470 } 4471 4472 /// \brief Retrieve a qualifying protocol by index on the object 4473 /// type. 4474 ObjCProtocolDecl *getProtocol(unsigned I) const { 4475 return getObjectType()->getProtocol(I); 4476 } 4477 4478 bool isSugared() const { return false; } 4479 QualType desugar() const { return QualType(this, 0); } 4480 4481 void Profile(llvm::FoldingSetNodeID &ID) { 4482 Profile(ID, getPointeeType()); 4483 } 4484 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 4485 ID.AddPointer(T.getAsOpaquePtr()); 4486 } 4487 static bool classof(const Type *T) { 4488 return T->getTypeClass() == ObjCObjectPointer; 4489 } 4490}; 4491 4492class AtomicType : public Type, public llvm::FoldingSetNode { 4493 QualType ValueType; 4494 4495 AtomicType(QualType ValTy, QualType Canonical) 4496 : Type(Atomic, Canonical, ValTy->isDependentType(), 4497 ValTy->isInstantiationDependentType(), 4498 ValTy->isVariablyModifiedType(), 4499 ValTy->containsUnexpandedParameterPack()), 4500 ValueType(ValTy) {} 4501 friend class ASTContext; // ASTContext creates these. 4502 4503 public: 4504 /// getValueType - Gets the type contained by this atomic type, i.e. 4505 /// the type returned by performing an atomic load of this atomic type. 4506 QualType getValueType() const { return ValueType; } 4507 4508 bool isSugared() const { return false; } 4509 QualType desugar() const { return QualType(this, 0); } 4510 4511 void Profile(llvm::FoldingSetNodeID &ID) { 4512 Profile(ID, getValueType()); 4513 } 4514 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 4515 ID.AddPointer(T.getAsOpaquePtr()); 4516 } 4517 static bool classof(const Type *T) { 4518 return T->getTypeClass() == Atomic; 4519 } 4520}; 4521 4522/// A qualifier set is used to build a set of qualifiers. 4523class QualifierCollector : public Qualifiers { 4524public: 4525 QualifierCollector(Qualifiers Qs = Qualifiers()) : Qualifiers(Qs) {} 4526 4527 /// Collect any qualifiers on the given type and return an 4528 /// unqualified type. The qualifiers are assumed to be consistent 4529 /// with those already in the type. 4530 const Type *strip(QualType type) { 4531 addFastQualifiers(type.getLocalFastQualifiers()); 4532 if (!type.hasLocalNonFastQualifiers()) 4533 return type.getTypePtrUnsafe(); 4534 4535 const ExtQuals *extQuals = type.getExtQualsUnsafe(); 4536 addConsistentQualifiers(extQuals->getQualifiers()); 4537 return extQuals->getBaseType(); 4538 } 4539 4540 /// Apply the collected qualifiers to the given type. 4541 QualType apply(const ASTContext &Context, QualType QT) const; 4542 4543 /// Apply the collected qualifiers to the given type. 4544 QualType apply(const ASTContext &Context, const Type* T) const; 4545}; 4546 4547 4548// Inline function definitions. 4549 4550inline SplitQualType SplitQualType::getSingleStepDesugaredType() const { 4551 SplitQualType desugar = 4552 Ty->getLocallyUnqualifiedSingleStepDesugaredType().split(); 4553 desugar.Quals.addConsistentQualifiers(Quals); 4554 return desugar; 4555} 4556 4557inline const Type *QualType::getTypePtr() const { 4558 return getCommonPtr()->BaseType; 4559} 4560 4561inline const Type *QualType::getTypePtrOrNull() const { 4562 return (isNull() ? 0 : getCommonPtr()->BaseType); 4563} 4564 4565inline SplitQualType QualType::split() const { 4566 if (!hasLocalNonFastQualifiers()) 4567 return SplitQualType(getTypePtrUnsafe(), 4568 Qualifiers::fromFastMask(getLocalFastQualifiers())); 4569 4570 const ExtQuals *eq = getExtQualsUnsafe(); 4571 Qualifiers qs = eq->getQualifiers(); 4572 qs.addFastQualifiers(getLocalFastQualifiers()); 4573 return SplitQualType(eq->getBaseType(), qs); 4574} 4575 4576inline Qualifiers QualType::getLocalQualifiers() const { 4577 Qualifiers Quals; 4578 if (hasLocalNonFastQualifiers()) 4579 Quals = getExtQualsUnsafe()->getQualifiers(); 4580 Quals.addFastQualifiers(getLocalFastQualifiers()); 4581 return Quals; 4582} 4583 4584inline Qualifiers QualType::getQualifiers() const { 4585 Qualifiers quals = getCommonPtr()->CanonicalType.getLocalQualifiers(); 4586 quals.addFastQualifiers(getLocalFastQualifiers()); 4587 return quals; 4588} 4589 4590inline unsigned QualType::getCVRQualifiers() const { 4591 unsigned cvr = getCommonPtr()->CanonicalType.getLocalCVRQualifiers(); 4592 cvr |= getLocalCVRQualifiers(); 4593 return cvr; 4594} 4595 4596inline QualType QualType::getCanonicalType() const { 4597 QualType canon = getCommonPtr()->CanonicalType; 4598 return canon.withFastQualifiers(getLocalFastQualifiers()); 4599} 4600 4601inline bool QualType::isCanonical() const { 4602 return getTypePtr()->isCanonicalUnqualified(); 4603} 4604 4605inline bool QualType::isCanonicalAsParam() const { 4606 if (!isCanonical()) return false; 4607 if (hasLocalQualifiers()) return false; 4608 4609 const Type *T = getTypePtr(); 4610 if (T->isVariablyModifiedType() && T->hasSizedVLAType()) 4611 return false; 4612 4613 return !isa<FunctionType>(T) && !isa<ArrayType>(T); 4614} 4615 4616inline bool QualType::isConstQualified() const { 4617 return isLocalConstQualified() || 4618 getCommonPtr()->CanonicalType.isLocalConstQualified(); 4619} 4620 4621inline bool QualType::isRestrictQualified() const { 4622 return isLocalRestrictQualified() || 4623 getCommonPtr()->CanonicalType.isLocalRestrictQualified(); 4624} 4625 4626 4627inline bool QualType::isVolatileQualified() const { 4628 return isLocalVolatileQualified() || 4629 getCommonPtr()->CanonicalType.isLocalVolatileQualified(); 4630} 4631 4632inline bool QualType::hasQualifiers() const { 4633 return hasLocalQualifiers() || 4634 getCommonPtr()->CanonicalType.hasLocalQualifiers(); 4635} 4636 4637inline QualType QualType::getUnqualifiedType() const { 4638 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4639 return QualType(getTypePtr(), 0); 4640 4641 return QualType(getSplitUnqualifiedTypeImpl(*this).Ty, 0); 4642} 4643 4644inline SplitQualType QualType::getSplitUnqualifiedType() const { 4645 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4646 return split(); 4647 4648 return getSplitUnqualifiedTypeImpl(*this); 4649} 4650 4651inline void QualType::removeLocalConst() { 4652 removeLocalFastQualifiers(Qualifiers::Const); 4653} 4654 4655inline void QualType::removeLocalRestrict() { 4656 removeLocalFastQualifiers(Qualifiers::Restrict); 4657} 4658 4659inline void QualType::removeLocalVolatile() { 4660 removeLocalFastQualifiers(Qualifiers::Volatile); 4661} 4662 4663inline void QualType::removeLocalCVRQualifiers(unsigned Mask) { 4664 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 4665 assert((int)Qualifiers::CVRMask == (int)Qualifiers::FastMask); 4666 4667 // Fast path: we don't need to touch the slow qualifiers. 4668 removeLocalFastQualifiers(Mask); 4669} 4670 4671/// getAddressSpace - Return the address space of this type. 4672inline unsigned QualType::getAddressSpace() const { 4673 return getQualifiers().getAddressSpace(); 4674} 4675 4676/// getObjCGCAttr - Return the gc attribute of this type. 4677inline Qualifiers::GC QualType::getObjCGCAttr() const { 4678 return getQualifiers().getObjCGCAttr(); 4679} 4680 4681inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { 4682 if (const PointerType *PT = t.getAs<PointerType>()) { 4683 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 4684 return FT->getExtInfo(); 4685 } else if (const FunctionType *FT = t.getAs<FunctionType>()) 4686 return FT->getExtInfo(); 4687 4688 return FunctionType::ExtInfo(); 4689} 4690 4691inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { 4692 return getFunctionExtInfo(*t); 4693} 4694 4695/// isMoreQualifiedThan - Determine whether this type is more 4696/// qualified than the Other type. For example, "const volatile int" 4697/// is more qualified than "const int", "volatile int", and 4698/// "int". However, it is not more qualified than "const volatile 4699/// int". 4700inline bool QualType::isMoreQualifiedThan(QualType other) const { 4701 Qualifiers myQuals = getQualifiers(); 4702 Qualifiers otherQuals = other.getQualifiers(); 4703 return (myQuals != otherQuals && myQuals.compatiblyIncludes(otherQuals)); 4704} 4705 4706/// isAtLeastAsQualifiedAs - Determine whether this type is at last 4707/// as qualified as the Other type. For example, "const volatile 4708/// int" is at least as qualified as "const int", "volatile int", 4709/// "int", and "const volatile int". 4710inline bool QualType::isAtLeastAsQualifiedAs(QualType other) const { 4711 return getQualifiers().compatiblyIncludes(other.getQualifiers()); 4712} 4713 4714/// getNonReferenceType - If Type is a reference type (e.g., const 4715/// int&), returns the type that the reference refers to ("const 4716/// int"). Otherwise, returns the type itself. This routine is used 4717/// throughout Sema to implement C++ 5p6: 4718/// 4719/// If an expression initially has the type "reference to T" (8.3.2, 4720/// 8.5.3), the type is adjusted to "T" prior to any further 4721/// analysis, the expression designates the object or function 4722/// denoted by the reference, and the expression is an lvalue. 4723inline QualType QualType::getNonReferenceType() const { 4724 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 4725 return RefType->getPointeeType(); 4726 else 4727 return *this; 4728} 4729 4730inline bool QualType::isCForbiddenLValueType() const { 4731 return ((getTypePtr()->isVoidType() && !hasQualifiers()) || 4732 getTypePtr()->isFunctionType()); 4733} 4734 4735/// \brief Tests whether the type is categorized as a fundamental type. 4736/// 4737/// \returns True for types specified in C++0x [basic.fundamental]. 4738inline bool Type::isFundamentalType() const { 4739 return isVoidType() || 4740 // FIXME: It's really annoying that we don't have an 4741 // 'isArithmeticType()' which agrees with the standard definition. 4742 (isArithmeticType() && !isEnumeralType()); 4743} 4744 4745/// \brief Tests whether the type is categorized as a compound type. 4746/// 4747/// \returns True for types specified in C++0x [basic.compound]. 4748inline bool Type::isCompoundType() const { 4749 // C++0x [basic.compound]p1: 4750 // Compound types can be constructed in the following ways: 4751 // -- arrays of objects of a given type [...]; 4752 return isArrayType() || 4753 // -- functions, which have parameters of given types [...]; 4754 isFunctionType() || 4755 // -- pointers to void or objects or functions [...]; 4756 isPointerType() || 4757 // -- references to objects or functions of a given type. [...] 4758 isReferenceType() || 4759 // -- classes containing a sequence of objects of various types, [...]; 4760 isRecordType() || 4761 // -- unions, which are classes capable of containing objects of different 4762 // types at different times; 4763 isUnionType() || 4764 // -- enumerations, which comprise a set of named constant values. [...]; 4765 isEnumeralType() || 4766 // -- pointers to non-static class members, [...]. 4767 isMemberPointerType(); 4768} 4769 4770inline bool Type::isFunctionType() const { 4771 return isa<FunctionType>(CanonicalType); 4772} 4773inline bool Type::isPointerType() const { 4774 return isa<PointerType>(CanonicalType); 4775} 4776inline bool Type::isAnyPointerType() const { 4777 return isPointerType() || isObjCObjectPointerType(); 4778} 4779inline bool Type::isBlockPointerType() const { 4780 return isa<BlockPointerType>(CanonicalType); 4781} 4782inline bool Type::isReferenceType() const { 4783 return isa<ReferenceType>(CanonicalType); 4784} 4785inline bool Type::isLValueReferenceType() const { 4786 return isa<LValueReferenceType>(CanonicalType); 4787} 4788inline bool Type::isRValueReferenceType() const { 4789 return isa<RValueReferenceType>(CanonicalType); 4790} 4791inline bool Type::isFunctionPointerType() const { 4792 if (const PointerType *T = getAs<PointerType>()) 4793 return T->getPointeeType()->isFunctionType(); 4794 else 4795 return false; 4796} 4797inline bool Type::isMemberPointerType() const { 4798 return isa<MemberPointerType>(CanonicalType); 4799} 4800inline bool Type::isMemberFunctionPointerType() const { 4801 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4802 return T->isMemberFunctionPointer(); 4803 else 4804 return false; 4805} 4806inline bool Type::isMemberDataPointerType() const { 4807 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4808 return T->isMemberDataPointer(); 4809 else 4810 return false; 4811} 4812inline bool Type::isArrayType() const { 4813 return isa<ArrayType>(CanonicalType); 4814} 4815inline bool Type::isConstantArrayType() const { 4816 return isa<ConstantArrayType>(CanonicalType); 4817} 4818inline bool Type::isIncompleteArrayType() const { 4819 return isa<IncompleteArrayType>(CanonicalType); 4820} 4821inline bool Type::isVariableArrayType() const { 4822 return isa<VariableArrayType>(CanonicalType); 4823} 4824inline bool Type::isDependentSizedArrayType() const { 4825 return isa<DependentSizedArrayType>(CanonicalType); 4826} 4827inline bool Type::isBuiltinType() const { 4828 return isa<BuiltinType>(CanonicalType); 4829} 4830inline bool Type::isRecordType() const { 4831 return isa<RecordType>(CanonicalType); 4832} 4833inline bool Type::isEnumeralType() const { 4834 return isa<EnumType>(CanonicalType); 4835} 4836inline bool Type::isAnyComplexType() const { 4837 return isa<ComplexType>(CanonicalType); 4838} 4839inline bool Type::isVectorType() const { 4840 return isa<VectorType>(CanonicalType); 4841} 4842inline bool Type::isExtVectorType() const { 4843 return isa<ExtVectorType>(CanonicalType); 4844} 4845inline bool Type::isObjCObjectPointerType() const { 4846 return isa<ObjCObjectPointerType>(CanonicalType); 4847} 4848inline bool Type::isObjCObjectType() const { 4849 return isa<ObjCObjectType>(CanonicalType); 4850} 4851inline bool Type::isObjCObjectOrInterfaceType() const { 4852 return isa<ObjCInterfaceType>(CanonicalType) || 4853 isa<ObjCObjectType>(CanonicalType); 4854} 4855inline bool Type::isAtomicType() const { 4856 return isa<AtomicType>(CanonicalType); 4857} 4858 4859inline bool Type::isObjCQualifiedIdType() const { 4860 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4861 return OPT->isObjCQualifiedIdType(); 4862 return false; 4863} 4864inline bool Type::isObjCQualifiedClassType() const { 4865 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4866 return OPT->isObjCQualifiedClassType(); 4867 return false; 4868} 4869inline bool Type::isObjCIdType() const { 4870 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4871 return OPT->isObjCIdType(); 4872 return false; 4873} 4874inline bool Type::isObjCClassType() const { 4875 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4876 return OPT->isObjCClassType(); 4877 return false; 4878} 4879inline bool Type::isObjCSelType() const { 4880 if (const PointerType *OPT = getAs<PointerType>()) 4881 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 4882 return false; 4883} 4884inline bool Type::isObjCBuiltinType() const { 4885 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 4886} 4887 4888inline bool Type::isImage1dT() const { 4889 return isSpecificBuiltinType(BuiltinType::OCLImage1d); 4890} 4891 4892inline bool Type::isImage1dArrayT() const { 4893 return isSpecificBuiltinType(BuiltinType::OCLImage1dArray); 4894} 4895 4896inline bool Type::isImage1dBufferT() const { 4897 return isSpecificBuiltinType(BuiltinType::OCLImage1dBuffer); 4898} 4899 4900inline bool Type::isImage2dT() const { 4901 return isSpecificBuiltinType(BuiltinType::OCLImage2d); 4902} 4903 4904inline bool Type::isImage2dArrayT() const { 4905 return isSpecificBuiltinType(BuiltinType::OCLImage2dArray); 4906} 4907 4908inline bool Type::isImage3dT() const { 4909 return isSpecificBuiltinType(BuiltinType::OCLImage3d); 4910} 4911 4912inline bool Type::isSamplerT() const { 4913 return isSpecificBuiltinType(BuiltinType::OCLSampler); 4914} 4915 4916inline bool Type::isEventT() const { 4917 return isSpecificBuiltinType(BuiltinType::OCLEvent); 4918} 4919 4920inline bool Type::isImageType() const { 4921 return isImage3dT() || 4922 isImage2dT() || isImage2dArrayT() || 4923 isImage1dT() || isImage1dArrayT() || isImage1dBufferT(); 4924} 4925 4926inline bool Type::isOpenCLSpecificType() const { 4927 return isSamplerT() || isEventT() || isImageType(); 4928} 4929 4930inline bool Type::isTemplateTypeParmType() const { 4931 return isa<TemplateTypeParmType>(CanonicalType); 4932} 4933 4934inline bool Type::isSpecificBuiltinType(unsigned K) const { 4935 if (const BuiltinType *BT = getAs<BuiltinType>()) 4936 if (BT->getKind() == (BuiltinType::Kind) K) 4937 return true; 4938 return false; 4939} 4940 4941inline bool Type::isPlaceholderType() const { 4942 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4943 return BT->isPlaceholderType(); 4944 return false; 4945} 4946 4947inline const BuiltinType *Type::getAsPlaceholderType() const { 4948 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4949 if (BT->isPlaceholderType()) 4950 return BT; 4951 return 0; 4952} 4953 4954inline bool Type::isSpecificPlaceholderType(unsigned K) const { 4955 assert(BuiltinType::isPlaceholderTypeKind((BuiltinType::Kind) K)); 4956 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4957 return (BT->getKind() == (BuiltinType::Kind) K); 4958 return false; 4959} 4960 4961inline bool Type::isNonOverloadPlaceholderType() const { 4962 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4963 return BT->isNonOverloadPlaceholderType(); 4964 return false; 4965} 4966 4967inline bool Type::isVoidType() const { 4968 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 4969 return BT->getKind() == BuiltinType::Void; 4970 return false; 4971} 4972 4973inline bool Type::isHalfType() const { 4974 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 4975 return BT->getKind() == BuiltinType::Half; 4976 // FIXME: Should we allow complex __fp16? Probably not. 4977 return false; 4978} 4979 4980inline bool Type::isNullPtrType() const { 4981 if (const BuiltinType *BT = getAs<BuiltinType>()) 4982 return BT->getKind() == BuiltinType::NullPtr; 4983 return false; 4984} 4985 4986extern bool IsEnumDeclComplete(EnumDecl *); 4987extern bool IsEnumDeclScoped(EnumDecl *); 4988 4989inline bool Type::isIntegerType() const { 4990 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 4991 return BT->getKind() >= BuiltinType::Bool && 4992 BT->getKind() <= BuiltinType::Int128; 4993 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) { 4994 // Incomplete enum types are not treated as integer types. 4995 // FIXME: In C++, enum types are never integer types. 4996 return IsEnumDeclComplete(ET->getDecl()) && 4997 !IsEnumDeclScoped(ET->getDecl()); 4998 } 4999 return false; 5000} 5001 5002inline bool Type::isScalarType() const { 5003 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 5004 return BT->getKind() > BuiltinType::Void && 5005 BT->getKind() <= BuiltinType::NullPtr; 5006 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) 5007 // Enums are scalar types, but only if they are defined. Incomplete enums 5008 // are not treated as scalar types. 5009 return IsEnumDeclComplete(ET->getDecl()); 5010 return isa<PointerType>(CanonicalType) || 5011 isa<BlockPointerType>(CanonicalType) || 5012 isa<MemberPointerType>(CanonicalType) || 5013 isa<ComplexType>(CanonicalType) || 5014 isa<ObjCObjectPointerType>(CanonicalType); 5015} 5016 5017inline bool Type::isIntegralOrEnumerationType() const { 5018 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 5019 return BT->getKind() >= BuiltinType::Bool && 5020 BT->getKind() <= BuiltinType::Int128; 5021 5022 // Check for a complete enum type; incomplete enum types are not properly an 5023 // enumeration type in the sense required here. 5024 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) 5025 return IsEnumDeclComplete(ET->getDecl()); 5026 5027 return false; 5028} 5029 5030inline bool Type::isBooleanType() const { 5031 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 5032 return BT->getKind() == BuiltinType::Bool; 5033 return false; 5034} 5035 5036/// \brief Determines whether this is a type for which one can define 5037/// an overloaded operator. 5038inline bool Type::isOverloadableType() const { 5039 return isDependentType() || isRecordType() || isEnumeralType(); 5040} 5041 5042/// \brief Determines whether this type can decay to a pointer type. 5043inline bool Type::canDecayToPointerType() const { 5044 return isFunctionType() || isArrayType(); 5045} 5046 5047inline bool Type::hasPointerRepresentation() const { 5048 return (isPointerType() || isReferenceType() || isBlockPointerType() || 5049 isObjCObjectPointerType() || isNullPtrType()); 5050} 5051 5052inline bool Type::hasObjCPointerRepresentation() const { 5053 return isObjCObjectPointerType(); 5054} 5055 5056inline const Type *Type::getBaseElementTypeUnsafe() const { 5057 const Type *type = this; 5058 while (const ArrayType *arrayType = type->getAsArrayTypeUnsafe()) 5059 type = arrayType->getElementType().getTypePtr(); 5060 return type; 5061} 5062 5063/// Insertion operator for diagnostics. This allows sending QualType's into a 5064/// diagnostic with <<. 5065inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 5066 QualType T) { 5067 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 5068 DiagnosticsEngine::ak_qualtype); 5069 return DB; 5070} 5071 5072/// Insertion operator for partial diagnostics. This allows sending QualType's 5073/// into a diagnostic with <<. 5074inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, 5075 QualType T) { 5076 PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 5077 DiagnosticsEngine::ak_qualtype); 5078 return PD; 5079} 5080 5081// Helper class template that is used by Type::getAs to ensure that one does 5082// not try to look through a qualified type to get to an array type. 5083template<typename T, 5084 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 5085 llvm::is_base_of<ArrayType, T>::value)> 5086struct ArrayType_cannot_be_used_with_getAs { }; 5087 5088template<typename T> 5089struct ArrayType_cannot_be_used_with_getAs<T, true>; 5090 5091// Member-template getAs<specific type>'. 5092template <typename T> const T *Type::getAs() const { 5093 ArrayType_cannot_be_used_with_getAs<T> at; 5094 (void)at; 5095 5096 // If this is directly a T type, return it. 5097 if (const T *Ty = dyn_cast<T>(this)) 5098 return Ty; 5099 5100 // If the canonical form of this type isn't the right kind, reject it. 5101 if (!isa<T>(CanonicalType)) 5102 return 0; 5103 5104 // If this is a typedef for the type, strip the typedef off without 5105 // losing all typedef information. 5106 return cast<T>(getUnqualifiedDesugaredType()); 5107} 5108 5109inline const ArrayType *Type::getAsArrayTypeUnsafe() const { 5110 // If this is directly an array type, return it. 5111 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) 5112 return arr; 5113 5114 // If the canonical form of this type isn't the right kind, reject it. 5115 if (!isa<ArrayType>(CanonicalType)) 5116 return 0; 5117 5118 // If this is a typedef for the type, strip the typedef off without 5119 // losing all typedef information. 5120 return cast<ArrayType>(getUnqualifiedDesugaredType()); 5121} 5122 5123template <typename T> const T *Type::castAs() const { 5124 ArrayType_cannot_be_used_with_getAs<T> at; 5125 (void) at; 5126 5127 assert(isa<T>(CanonicalType)); 5128 if (const T *ty = dyn_cast<T>(this)) return ty; 5129 return cast<T>(getUnqualifiedDesugaredType()); 5130} 5131 5132inline const ArrayType *Type::castAsArrayTypeUnsafe() const { 5133 assert(isa<ArrayType>(CanonicalType)); 5134 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) return arr; 5135 return cast<ArrayType>(getUnqualifiedDesugaredType()); 5136} 5137 5138} // end namespace clang 5139 5140#endif 5141