Type.h revision e81fdb1fdde48d3fa18df56c5797f6b0bc5dfc4a
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 union { 1330 TypeBitfields TypeBits; 1331 ArrayTypeBitfields ArrayTypeBits; 1332 AttributedTypeBitfields AttributedTypeBits; 1333 BuiltinTypeBitfields BuiltinTypeBits; 1334 FunctionTypeBitfields FunctionTypeBits; 1335 ObjCObjectTypeBitfields ObjCObjectTypeBits; 1336 ReferenceTypeBitfields ReferenceTypeBits; 1337 TypeWithKeywordBitfields TypeWithKeywordBits; 1338 VectorTypeBitfields VectorTypeBits; 1339 }; 1340 1341private: 1342 /// \brief Set whether this type comes from an AST file. 1343 void setFromAST(bool V = true) const { 1344 TypeBits.FromAST = V; 1345 } 1346 1347 template <class T> friend class TypePropertyCache; 1348 1349protected: 1350 // silence VC++ warning C4355: 'this' : used in base member initializer list 1351 Type *this_() { return this; } 1352 Type(TypeClass tc, QualType canon, bool Dependent, 1353 bool InstantiationDependent, bool VariablyModified, 1354 bool ContainsUnexpandedParameterPack) 1355 : ExtQualsTypeCommonBase(this, 1356 canon.isNull() ? QualType(this_(), 0) : canon) { 1357 TypeBits.TC = tc; 1358 TypeBits.Dependent = Dependent; 1359 TypeBits.InstantiationDependent = Dependent || InstantiationDependent; 1360 TypeBits.VariablyModified = VariablyModified; 1361 TypeBits.ContainsUnexpandedParameterPack = ContainsUnexpandedParameterPack; 1362 TypeBits.CacheValid = false; 1363 TypeBits.CachedLocalOrUnnamed = false; 1364 TypeBits.CachedLinkage = NoLinkage; 1365 TypeBits.FromAST = false; 1366 } 1367 friend class ASTContext; 1368 1369 void setDependent(bool D = true) { 1370 TypeBits.Dependent = D; 1371 if (D) 1372 TypeBits.InstantiationDependent = true; 1373 } 1374 void setInstantiationDependent(bool D = true) { 1375 TypeBits.InstantiationDependent = D; } 1376 void setVariablyModified(bool VM = true) { TypeBits.VariablyModified = VM; 1377 } 1378 void setContainsUnexpandedParameterPack(bool PP = true) { 1379 TypeBits.ContainsUnexpandedParameterPack = PP; 1380 } 1381 1382public: 1383 TypeClass getTypeClass() const { return static_cast<TypeClass>(TypeBits.TC); } 1384 1385 /// \brief Whether this type comes from an AST file. 1386 bool isFromAST() const { return TypeBits.FromAST; } 1387 1388 /// \brief Whether this type is or contains an unexpanded parameter 1389 /// pack, used to support C++0x variadic templates. 1390 /// 1391 /// A type that contains a parameter pack shall be expanded by the 1392 /// ellipsis operator at some point. For example, the typedef in the 1393 /// following example contains an unexpanded parameter pack 'T': 1394 /// 1395 /// \code 1396 /// template<typename ...T> 1397 /// struct X { 1398 /// typedef T* pointer_types; // ill-formed; T is a parameter pack. 1399 /// }; 1400 /// \endcode 1401 /// 1402 /// Note that this routine does not specify which 1403 bool containsUnexpandedParameterPack() const { 1404 return TypeBits.ContainsUnexpandedParameterPack; 1405 } 1406 1407 /// Determines if this type would be canonical if it had no further 1408 /// qualification. 1409 bool isCanonicalUnqualified() const { 1410 return CanonicalType == QualType(this, 0); 1411 } 1412 1413 /// Pull a single level of sugar off of this locally-unqualified type. 1414 /// Users should generally prefer SplitQualType::getSingleStepDesugaredType() 1415 /// or QualType::getSingleStepDesugaredType(const ASTContext&). 1416 QualType getLocallyUnqualifiedSingleStepDesugaredType() const; 1417 1418 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 1419 /// object types, function types, and incomplete types. 1420 1421 /// isIncompleteType - Return true if this is an incomplete type. 1422 /// A type that can describe objects, but which lacks information needed to 1423 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 1424 /// routine will need to determine if the size is actually required. 1425 /// 1426 /// \brief Def If non-NULL, and the type refers to some kind of declaration 1427 /// that can be completed (such as a C struct, C++ class, or Objective-C 1428 /// class), will be set to the declaration. 1429 bool isIncompleteType(NamedDecl **Def = 0) const; 1430 1431 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 1432 /// type, in other words, not a function type. 1433 bool isIncompleteOrObjectType() const { 1434 return !isFunctionType(); 1435 } 1436 1437 /// \brief Determine whether this type is an object type. 1438 bool isObjectType() const { 1439 // C++ [basic.types]p8: 1440 // An object type is a (possibly cv-qualified) type that is not a 1441 // function type, not a reference type, and not a void type. 1442 return !isReferenceType() && !isFunctionType() && !isVoidType(); 1443 } 1444 1445 /// isLiteralType - Return true if this is a literal type 1446 /// (C++0x [basic.types]p10) 1447 bool isLiteralType() const; 1448 1449 /// \brief Test if this type is a standard-layout type. 1450 /// (C++0x [basic.type]p9) 1451 bool isStandardLayoutType() const; 1452 1453 /// Helper methods to distinguish type categories. All type predicates 1454 /// operate on the canonical type, ignoring typedefs and qualifiers. 1455 1456 /// isBuiltinType - returns true if the type is a builtin type. 1457 bool isBuiltinType() const; 1458 1459 /// isSpecificBuiltinType - Test for a particular builtin type. 1460 bool isSpecificBuiltinType(unsigned K) const; 1461 1462 /// isPlaceholderType - Test for a type which does not represent an 1463 /// actual type-system type but is instead used as a placeholder for 1464 /// various convenient purposes within Clang. All such types are 1465 /// BuiltinTypes. 1466 bool isPlaceholderType() const; 1467 const BuiltinType *getAsPlaceholderType() const; 1468 1469 /// isSpecificPlaceholderType - Test for a specific placeholder type. 1470 bool isSpecificPlaceholderType(unsigned K) const; 1471 1472 /// isNonOverloadPlaceholderType - Test for a placeholder type 1473 /// other than Overload; see BuiltinType::isNonOverloadPlaceholderType. 1474 bool isNonOverloadPlaceholderType() const; 1475 1476 /// isIntegerType() does *not* include complex integers (a GCC extension). 1477 /// isComplexIntegerType() can be used to test for complex integers. 1478 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 1479 bool isEnumeralType() const; 1480 bool isBooleanType() const; 1481 bool isCharType() const; 1482 bool isWideCharType() const; 1483 bool isChar16Type() const; 1484 bool isChar32Type() const; 1485 bool isAnyCharacterType() const; 1486 bool isIntegralType(ASTContext &Ctx) const; 1487 1488 /// \brief Determine whether this type is an integral or enumeration type. 1489 bool isIntegralOrEnumerationType() const; 1490 /// \brief Determine whether this type is an integral or unscoped enumeration 1491 /// type. 1492 bool isIntegralOrUnscopedEnumerationType() const; 1493 1494 /// Floating point categories. 1495 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 1496 /// isComplexType() does *not* include complex integers (a GCC extension). 1497 /// isComplexIntegerType() can be used to test for complex integers. 1498 bool isComplexType() const; // C99 6.2.5p11 (complex) 1499 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 1500 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 1501 bool isHalfType() const; // OpenCL 6.1.1.1, NEON (IEEE 754-2008 half) 1502 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 1503 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 1504 bool isVoidType() const; // C99 6.2.5p19 1505 bool isDerivedType() const; // C99 6.2.5p20 1506 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 1507 bool isAggregateType() const; 1508 bool isFundamentalType() const; 1509 bool isCompoundType() const; 1510 1511 // Type Predicates: Check to see if this type is structurally the specified 1512 // type, ignoring typedefs and qualifiers. 1513 bool isFunctionType() const; 1514 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 1515 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 1516 bool isPointerType() const; 1517 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 1518 bool isBlockPointerType() const; 1519 bool isVoidPointerType() const; 1520 bool isReferenceType() const; 1521 bool isLValueReferenceType() const; 1522 bool isRValueReferenceType() const; 1523 bool isFunctionPointerType() const; 1524 bool isMemberPointerType() const; 1525 bool isMemberFunctionPointerType() const; 1526 bool isMemberDataPointerType() const; 1527 bool isArrayType() const; 1528 bool isConstantArrayType() const; 1529 bool isIncompleteArrayType() const; 1530 bool isVariableArrayType() const; 1531 bool isDependentSizedArrayType() const; 1532 bool isRecordType() const; 1533 bool isClassType() const; 1534 bool isStructureType() const; 1535 bool isInterfaceType() const; 1536 bool isStructureOrClassType() const; 1537 bool isUnionType() const; 1538 bool isComplexIntegerType() const; // GCC _Complex integer type. 1539 bool isVectorType() const; // GCC vector type. 1540 bool isExtVectorType() const; // Extended vector type. 1541 bool isObjCObjectPointerType() const; // pointer to ObjC object 1542 bool isObjCRetainableType() const; // ObjC object or block pointer 1543 bool isObjCLifetimeType() const; // (array of)* retainable type 1544 bool isObjCIndirectLifetimeType() const; // (pointer to)* lifetime type 1545 bool isObjCNSObjectType() const; // __attribute__((NSObject)) 1546 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 1547 // for the common case. 1548 bool isObjCObjectType() const; // NSString or typeof(*(id)0) 1549 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 1550 bool isObjCQualifiedIdType() const; // id<foo> 1551 bool isObjCQualifiedClassType() const; // Class<foo> 1552 bool isObjCObjectOrInterfaceType() const; 1553 bool isObjCIdType() const; // id 1554 bool isObjCClassType() const; // Class 1555 bool isObjCSelType() const; // Class 1556 bool isObjCBuiltinType() const; // 'id' or 'Class' 1557 bool isObjCARCBridgableType() const; 1558 bool isCARCBridgableType() const; 1559 bool isTemplateTypeParmType() const; // C++ template type parameter 1560 bool isNullPtrType() const; // C++0x nullptr_t 1561 bool isAtomicType() const; // C11 _Atomic() 1562 1563 bool isImage1dT() const; // OpenCL image1d_t 1564 bool isImage1dArrayT() const; // OpenCL image1d_array_t 1565 bool isImage1dBufferT() const; // OpenCL image1d_buffer_t 1566 bool isImage2dT() const; // OpenCL image2d_t 1567 bool isImage2dArrayT() const; // OpenCL image2d_array_t 1568 bool isImage3dT() const; // OpenCL image3d_t 1569 1570 bool isImageType() const; // Any OpenCL image type 1571 1572 bool isSamplerT() const; // OpenCL sampler_t 1573 bool isEventT() const; // OpenCL event_t 1574 1575 bool isOpenCLSpecificType() const; // Any OpenCL specific type 1576 1577 /// Determines if this type, which must satisfy 1578 /// isObjCLifetimeType(), is implicitly __unsafe_unretained rather 1579 /// than implicitly __strong. 1580 bool isObjCARCImplicitlyUnretainedType() const; 1581 1582 /// Return the implicit lifetime for this type, which must not be dependent. 1583 Qualifiers::ObjCLifetime getObjCARCImplicitLifetime() const; 1584 1585 enum ScalarTypeKind { 1586 STK_CPointer, 1587 STK_BlockPointer, 1588 STK_ObjCObjectPointer, 1589 STK_MemberPointer, 1590 STK_Bool, 1591 STK_Integral, 1592 STK_Floating, 1593 STK_IntegralComplex, 1594 STK_FloatingComplex 1595 }; 1596 /// getScalarTypeKind - Given that this is a scalar type, classify it. 1597 ScalarTypeKind getScalarTypeKind() const; 1598 1599 /// isDependentType - Whether this type is a dependent type, meaning 1600 /// that its definition somehow depends on a template parameter 1601 /// (C++ [temp.dep.type]). 1602 bool isDependentType() const { return TypeBits.Dependent; } 1603 1604 /// \brief Determine whether this type is an instantiation-dependent type, 1605 /// meaning that the type involves a template parameter (even if the 1606 /// definition does not actually depend on the type substituted for that 1607 /// template parameter). 1608 bool isInstantiationDependentType() const { 1609 return TypeBits.InstantiationDependent; 1610 } 1611 1612 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 1613 bool isVariablyModifiedType() const { return TypeBits.VariablyModified; } 1614 1615 /// \brief Whether this type involves a variable-length array type 1616 /// with a definite size. 1617 bool hasSizedVLAType() const; 1618 1619 /// \brief Whether this type is or contains a local or unnamed type. 1620 bool hasUnnamedOrLocalType() const; 1621 1622 bool isOverloadableType() const; 1623 1624 /// \brief Determine wither this type is a C++ elaborated-type-specifier. 1625 bool isElaboratedTypeSpecifier() const; 1626 1627 bool canDecayToPointerType() const; 1628 1629 /// hasPointerRepresentation - Whether this type is represented 1630 /// natively as a pointer; this includes pointers, references, block 1631 /// pointers, and Objective-C interface, qualified id, and qualified 1632 /// interface types, as well as nullptr_t. 1633 bool hasPointerRepresentation() const; 1634 1635 /// hasObjCPointerRepresentation - Whether this type can represent 1636 /// an objective pointer type for the purpose of GC'ability 1637 bool hasObjCPointerRepresentation() const; 1638 1639 /// \brief Determine whether this type has an integer representation 1640 /// of some sort, e.g., it is an integer type or a vector. 1641 bool hasIntegerRepresentation() const; 1642 1643 /// \brief Determine whether this type has an signed integer representation 1644 /// of some sort, e.g., it is an signed integer type or a vector. 1645 bool hasSignedIntegerRepresentation() const; 1646 1647 /// \brief Determine whether this type has an unsigned integer representation 1648 /// of some sort, e.g., it is an unsigned integer type or a vector. 1649 bool hasUnsignedIntegerRepresentation() const; 1650 1651 /// \brief Determine whether this type has a floating-point representation 1652 /// of some sort, e.g., it is a floating-point type or a vector thereof. 1653 bool hasFloatingRepresentation() const; 1654 1655 // Type Checking Functions: Check to see if this type is structurally the 1656 // specified type, ignoring typedefs and qualifiers, and return a pointer to 1657 // the best type we can. 1658 const RecordType *getAsStructureType() const; 1659 /// NOTE: getAs*ArrayType are methods on ASTContext. 1660 const RecordType *getAsUnionType() const; 1661 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 1662 // The following is a convenience method that returns an ObjCObjectPointerType 1663 // for object declared using an interface. 1664 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 1665 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 1666 const ObjCObjectPointerType *getAsObjCQualifiedClassType() const; 1667 const ObjCObjectType *getAsObjCQualifiedInterfaceType() const; 1668 1669 /// \brief Retrieves the CXXRecordDecl that this type refers to, either 1670 /// because the type is a RecordType or because it is the injected-class-name 1671 /// type of a class template or class template partial specialization. 1672 CXXRecordDecl *getAsCXXRecordDecl() const; 1673 1674 /// If this is a pointer or reference to a RecordType, return the 1675 /// CXXRecordDecl that that type refers to. 1676 /// 1677 /// If this is not a pointer or reference, or the type being pointed to does 1678 /// not refer to a CXXRecordDecl, returns NULL. 1679 const CXXRecordDecl *getPointeeCXXRecordDecl() const; 1680 1681 /// \brief Get the AutoType whose type will be deduced for a variable with 1682 /// an initializer of this type. This looks through declarators like pointer 1683 /// types, but not through decltype or typedefs. 1684 AutoType *getContainedAutoType() const; 1685 1686 /// Member-template getAs<specific type>'. Look through sugar for 1687 /// an instance of \<specific type>. This scheme will eventually 1688 /// replace the specific getAsXXXX methods above. 1689 /// 1690 /// There are some specializations of this member template listed 1691 /// immediately following this class. 1692 template <typename T> const T *getAs() const; 1693 1694 /// A variant of getAs<> for array types which silently discards 1695 /// qualifiers from the outermost type. 1696 const ArrayType *getAsArrayTypeUnsafe() const; 1697 1698 /// Member-template castAs<specific type>. Look through sugar for 1699 /// the underlying instance of \<specific type>. 1700 /// 1701 /// This method has the same relationship to getAs<T> as cast<T> has 1702 /// to dyn_cast<T>; which is to say, the underlying type *must* 1703 /// have the intended type, and this method will never return null. 1704 template <typename T> const T *castAs() const; 1705 1706 /// A variant of castAs<> for array type which silently discards 1707 /// qualifiers from the outermost type. 1708 const ArrayType *castAsArrayTypeUnsafe() const; 1709 1710 /// getBaseElementTypeUnsafe - Get the base element type of this 1711 /// type, potentially discarding type qualifiers. This method 1712 /// should never be used when type qualifiers are meaningful. 1713 const Type *getBaseElementTypeUnsafe() const; 1714 1715 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 1716 /// element type of the array, potentially with type qualifiers missing. 1717 /// This method should never be used when type qualifiers are meaningful. 1718 const Type *getArrayElementTypeNoTypeQual() const; 1719 1720 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 1721 /// pointer, this returns the respective pointee. 1722 QualType getPointeeType() const; 1723 1724 /// getUnqualifiedDesugaredType() - Return the specified type with 1725 /// any "sugar" removed from the type, removing any typedefs, 1726 /// typeofs, etc., as well as any qualifiers. 1727 const Type *getUnqualifiedDesugaredType() const; 1728 1729 /// More type predicates useful for type checking/promotion 1730 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 1731 1732 /// isSignedIntegerType - Return true if this is an integer type that is 1733 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 1734 /// or an enum decl which has a signed representation. 1735 bool isSignedIntegerType() const; 1736 1737 /// isUnsignedIntegerType - Return true if this is an integer type that is 1738 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], 1739 /// or an enum decl which has an unsigned representation. 1740 bool isUnsignedIntegerType() const; 1741 1742 /// Determines whether this is an integer type that is signed or an 1743 /// enumeration types whose underlying type is a signed integer type. 1744 bool isSignedIntegerOrEnumerationType() const; 1745 1746 /// Determines whether this is an integer type that is unsigned or an 1747 /// enumeration types whose underlying type is a unsigned integer type. 1748 bool isUnsignedIntegerOrEnumerationType() const; 1749 1750 /// isConstantSizeType - Return true if this is not a variable sized type, 1751 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 1752 /// incomplete types. 1753 bool isConstantSizeType() const; 1754 1755 /// isSpecifierType - Returns true if this type can be represented by some 1756 /// set of type specifiers. 1757 bool isSpecifierType() const; 1758 1759 /// \brief Determine the linkage of this type. 1760 Linkage getLinkage() const; 1761 1762 /// \brief Determine the visibility of this type. 1763 Visibility getVisibility() const { 1764 return getLinkageAndVisibility().getVisibility(); 1765 } 1766 1767 /// \brief Return true if the visibility was explicitly set is the code. 1768 bool isVisibilityExplicit() const { 1769 return getLinkageAndVisibility().isVisibilityExplicit(); 1770 } 1771 1772 /// \brief Determine the linkage and visibility of this type. 1773 LinkageInfo getLinkageAndVisibility() const; 1774 1775 /// \brief True if the computed linkage is valid. Used for consistency 1776 /// checking. Should always return true. 1777 bool isLinkageValid() const; 1778 1779 const char *getTypeClassName() const; 1780 1781 QualType getCanonicalTypeInternal() const { 1782 return CanonicalType; 1783 } 1784 CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h 1785 LLVM_ATTRIBUTE_USED void dump() const; 1786 1787 friend class ASTReader; 1788 friend class ASTWriter; 1789}; 1790 1791/// \brief This will check for a TypedefType by removing any existing sugar 1792/// until it reaches a TypedefType or a non-sugared type. 1793template <> const TypedefType *Type::getAs() const; 1794 1795/// \brief This will check for a TemplateSpecializationType by removing any 1796/// existing sugar until it reaches a TemplateSpecializationType or a 1797/// non-sugared type. 1798template <> const TemplateSpecializationType *Type::getAs() const; 1799 1800// We can do canonical leaf types faster, because we don't have to 1801// worry about preserving child type decoration. 1802#define TYPE(Class, Base) 1803#define LEAF_TYPE(Class) \ 1804template <> inline const Class##Type *Type::getAs() const { \ 1805 return dyn_cast<Class##Type>(CanonicalType); \ 1806} \ 1807template <> inline const Class##Type *Type::castAs() const { \ 1808 return cast<Class##Type>(CanonicalType); \ 1809} 1810#include "clang/AST/TypeNodes.def" 1811 1812 1813/// BuiltinType - This class is used for builtin types like 'int'. Builtin 1814/// types are always canonical and have a literal name field. 1815class BuiltinType : public Type { 1816public: 1817 enum Kind { 1818#define BUILTIN_TYPE(Id, SingletonId) Id, 1819#define LAST_BUILTIN_TYPE(Id) LastKind = Id 1820#include "clang/AST/BuiltinTypes.def" 1821 }; 1822 1823public: 1824 BuiltinType(Kind K) 1825 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent), 1826 /*InstantiationDependent=*/(K == Dependent), 1827 /*VariablyModified=*/false, 1828 /*Unexpanded paramter pack=*/false) { 1829 BuiltinTypeBits.Kind = K; 1830 } 1831 1832 Kind getKind() const { return static_cast<Kind>(BuiltinTypeBits.Kind); } 1833 StringRef getName(const PrintingPolicy &Policy) const; 1834 const char *getNameAsCString(const PrintingPolicy &Policy) const { 1835 // The StringRef is null-terminated. 1836 StringRef str = getName(Policy); 1837 assert(!str.empty() && str.data()[str.size()] == '\0'); 1838 return str.data(); 1839 } 1840 1841 bool isSugared() const { return false; } 1842 QualType desugar() const { return QualType(this, 0); } 1843 1844 bool isInteger() const { 1845 return getKind() >= Bool && getKind() <= Int128; 1846 } 1847 1848 bool isSignedInteger() const { 1849 return getKind() >= Char_S && getKind() <= Int128; 1850 } 1851 1852 bool isUnsignedInteger() const { 1853 return getKind() >= Bool && getKind() <= UInt128; 1854 } 1855 1856 bool isFloatingPoint() const { 1857 return getKind() >= Half && getKind() <= LongDouble; 1858 } 1859 1860 /// Determines whether the given kind corresponds to a placeholder type. 1861 static bool isPlaceholderTypeKind(Kind K) { 1862 return K >= Overload; 1863 } 1864 1865 /// Determines whether this type is a placeholder type, i.e. a type 1866 /// which cannot appear in arbitrary positions in a fully-formed 1867 /// expression. 1868 bool isPlaceholderType() const { 1869 return isPlaceholderTypeKind(getKind()); 1870 } 1871 1872 /// Determines whether this type is a placeholder type other than 1873 /// Overload. Most placeholder types require only syntactic 1874 /// information about their context in order to be resolved (e.g. 1875 /// whether it is a call expression), which means they can (and 1876 /// should) be resolved in an earlier "phase" of analysis. 1877 /// Overload expressions sometimes pick up further information 1878 /// from their context, like whether the context expects a 1879 /// specific function-pointer type, and so frequently need 1880 /// special treatment. 1881 bool isNonOverloadPlaceholderType() const { 1882 return getKind() > Overload; 1883 } 1884 1885 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1886}; 1887 1888/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1889/// types (_Complex float etc) as well as the GCC integer complex extensions. 1890/// 1891class ComplexType : public Type, public llvm::FoldingSetNode { 1892 QualType ElementType; 1893 ComplexType(QualType Element, QualType CanonicalPtr) : 1894 Type(Complex, CanonicalPtr, Element->isDependentType(), 1895 Element->isInstantiationDependentType(), 1896 Element->isVariablyModifiedType(), 1897 Element->containsUnexpandedParameterPack()), 1898 ElementType(Element) { 1899 } 1900 friend class ASTContext; // ASTContext creates these. 1901 1902public: 1903 QualType getElementType() const { return ElementType; } 1904 1905 bool isSugared() const { return false; } 1906 QualType desugar() const { return QualType(this, 0); } 1907 1908 void Profile(llvm::FoldingSetNodeID &ID) { 1909 Profile(ID, getElementType()); 1910 } 1911 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1912 ID.AddPointer(Element.getAsOpaquePtr()); 1913 } 1914 1915 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1916}; 1917 1918/// ParenType - Sugar for parentheses used when specifying types. 1919/// 1920class ParenType : public Type, public llvm::FoldingSetNode { 1921 QualType Inner; 1922 1923 ParenType(QualType InnerType, QualType CanonType) : 1924 Type(Paren, CanonType, InnerType->isDependentType(), 1925 InnerType->isInstantiationDependentType(), 1926 InnerType->isVariablyModifiedType(), 1927 InnerType->containsUnexpandedParameterPack()), 1928 Inner(InnerType) { 1929 } 1930 friend class ASTContext; // ASTContext creates these. 1931 1932public: 1933 1934 QualType getInnerType() const { return Inner; } 1935 1936 bool isSugared() const { return true; } 1937 QualType desugar() const { return getInnerType(); } 1938 1939 void Profile(llvm::FoldingSetNodeID &ID) { 1940 Profile(ID, getInnerType()); 1941 } 1942 static void Profile(llvm::FoldingSetNodeID &ID, QualType Inner) { 1943 Inner.Profile(ID); 1944 } 1945 1946 static bool classof(const Type *T) { return T->getTypeClass() == Paren; } 1947}; 1948 1949/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1950/// 1951class PointerType : public Type, public llvm::FoldingSetNode { 1952 QualType PointeeType; 1953 1954 PointerType(QualType Pointee, QualType CanonicalPtr) : 1955 Type(Pointer, CanonicalPtr, Pointee->isDependentType(), 1956 Pointee->isInstantiationDependentType(), 1957 Pointee->isVariablyModifiedType(), 1958 Pointee->containsUnexpandedParameterPack()), 1959 PointeeType(Pointee) { 1960 } 1961 friend class ASTContext; // ASTContext creates these. 1962 1963public: 1964 1965 QualType getPointeeType() const { return PointeeType; } 1966 1967 bool isSugared() const { return false; } 1968 QualType desugar() const { return QualType(this, 0); } 1969 1970 void Profile(llvm::FoldingSetNodeID &ID) { 1971 Profile(ID, getPointeeType()); 1972 } 1973 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1974 ID.AddPointer(Pointee.getAsOpaquePtr()); 1975 } 1976 1977 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1978}; 1979 1980/// BlockPointerType - pointer to a block type. 1981/// This type is to represent types syntactically represented as 1982/// "void (^)(int)", etc. Pointee is required to always be a function type. 1983/// 1984class BlockPointerType : public Type, public llvm::FoldingSetNode { 1985 QualType PointeeType; // Block is some kind of pointer type 1986 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1987 Type(BlockPointer, CanonicalCls, Pointee->isDependentType(), 1988 Pointee->isInstantiationDependentType(), 1989 Pointee->isVariablyModifiedType(), 1990 Pointee->containsUnexpandedParameterPack()), 1991 PointeeType(Pointee) { 1992 } 1993 friend class ASTContext; // ASTContext creates these. 1994 1995public: 1996 1997 // Get the pointee type. Pointee is required to always be a function type. 1998 QualType getPointeeType() const { return PointeeType; } 1999 2000 bool isSugared() const { return false; } 2001 QualType desugar() const { return QualType(this, 0); } 2002 2003 void Profile(llvm::FoldingSetNodeID &ID) { 2004 Profile(ID, getPointeeType()); 2005 } 2006 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 2007 ID.AddPointer(Pointee.getAsOpaquePtr()); 2008 } 2009 2010 static bool classof(const Type *T) { 2011 return T->getTypeClass() == BlockPointer; 2012 } 2013}; 2014 2015/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 2016/// 2017class ReferenceType : public Type, public llvm::FoldingSetNode { 2018 QualType PointeeType; 2019 2020protected: 2021 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 2022 bool SpelledAsLValue) : 2023 Type(tc, CanonicalRef, Referencee->isDependentType(), 2024 Referencee->isInstantiationDependentType(), 2025 Referencee->isVariablyModifiedType(), 2026 Referencee->containsUnexpandedParameterPack()), 2027 PointeeType(Referencee) 2028 { 2029 ReferenceTypeBits.SpelledAsLValue = SpelledAsLValue; 2030 ReferenceTypeBits.InnerRef = Referencee->isReferenceType(); 2031 } 2032 2033public: 2034 bool isSpelledAsLValue() const { return ReferenceTypeBits.SpelledAsLValue; } 2035 bool isInnerRef() const { return ReferenceTypeBits.InnerRef; } 2036 2037 QualType getPointeeTypeAsWritten() const { return PointeeType; } 2038 QualType getPointeeType() const { 2039 // FIXME: this might strip inner qualifiers; okay? 2040 const ReferenceType *T = this; 2041 while (T->isInnerRef()) 2042 T = T->PointeeType->castAs<ReferenceType>(); 2043 return T->PointeeType; 2044 } 2045 2046 void Profile(llvm::FoldingSetNodeID &ID) { 2047 Profile(ID, PointeeType, isSpelledAsLValue()); 2048 } 2049 static void Profile(llvm::FoldingSetNodeID &ID, 2050 QualType Referencee, 2051 bool SpelledAsLValue) { 2052 ID.AddPointer(Referencee.getAsOpaquePtr()); 2053 ID.AddBoolean(SpelledAsLValue); 2054 } 2055 2056 static bool classof(const Type *T) { 2057 return T->getTypeClass() == LValueReference || 2058 T->getTypeClass() == RValueReference; 2059 } 2060}; 2061 2062/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 2063/// 2064class LValueReferenceType : public ReferenceType { 2065 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 2066 bool SpelledAsLValue) : 2067 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 2068 {} 2069 friend class ASTContext; // ASTContext creates these 2070public: 2071 bool isSugared() const { return false; } 2072 QualType desugar() const { return QualType(this, 0); } 2073 2074 static bool classof(const Type *T) { 2075 return T->getTypeClass() == LValueReference; 2076 } 2077}; 2078 2079/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 2080/// 2081class RValueReferenceType : public ReferenceType { 2082 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 2083 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 2084 } 2085 friend class ASTContext; // ASTContext creates these 2086public: 2087 bool isSugared() const { return false; } 2088 QualType desugar() const { return QualType(this, 0); } 2089 2090 static bool classof(const Type *T) { 2091 return T->getTypeClass() == RValueReference; 2092 } 2093}; 2094 2095/// MemberPointerType - C++ 8.3.3 - Pointers to members 2096/// 2097class MemberPointerType : public Type, public llvm::FoldingSetNode { 2098 QualType PointeeType; 2099 /// The class of which the pointee is a member. Must ultimately be a 2100 /// RecordType, but could be a typedef or a template parameter too. 2101 const Type *Class; 2102 2103 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 2104 Type(MemberPointer, CanonicalPtr, 2105 Cls->isDependentType() || Pointee->isDependentType(), 2106 (Cls->isInstantiationDependentType() || 2107 Pointee->isInstantiationDependentType()), 2108 Pointee->isVariablyModifiedType(), 2109 (Cls->containsUnexpandedParameterPack() || 2110 Pointee->containsUnexpandedParameterPack())), 2111 PointeeType(Pointee), Class(Cls) { 2112 } 2113 friend class ASTContext; // ASTContext creates these. 2114 2115public: 2116 QualType getPointeeType() const { return PointeeType; } 2117 2118 /// Returns true if the member type (i.e. the pointee type) is a 2119 /// function type rather than a data-member type. 2120 bool isMemberFunctionPointer() const { 2121 return PointeeType->isFunctionProtoType(); 2122 } 2123 2124 /// Returns true if the member type (i.e. the pointee type) is a 2125 /// data type rather than a function type. 2126 bool isMemberDataPointer() const { 2127 return !PointeeType->isFunctionProtoType(); 2128 } 2129 2130 const Type *getClass() const { return Class; } 2131 2132 bool isSugared() const { return false; } 2133 QualType desugar() const { return QualType(this, 0); } 2134 2135 void Profile(llvm::FoldingSetNodeID &ID) { 2136 Profile(ID, getPointeeType(), getClass()); 2137 } 2138 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 2139 const Type *Class) { 2140 ID.AddPointer(Pointee.getAsOpaquePtr()); 2141 ID.AddPointer(Class); 2142 } 2143 2144 static bool classof(const Type *T) { 2145 return T->getTypeClass() == MemberPointer; 2146 } 2147}; 2148 2149/// ArrayType - C99 6.7.5.2 - Array Declarators. 2150/// 2151class ArrayType : public Type, public llvm::FoldingSetNode { 2152public: 2153 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 2154 /// an array with a static size (e.g. int X[static 4]), or an array 2155 /// with a star size (e.g. int X[*]). 2156 /// 'static' is only allowed on function parameters. 2157 enum ArraySizeModifier { 2158 Normal, Static, Star 2159 }; 2160private: 2161 /// ElementType - The element type of the array. 2162 QualType ElementType; 2163 2164protected: 2165 // C++ [temp.dep.type]p1: 2166 // A type is dependent if it is... 2167 // - an array type constructed from any dependent type or whose 2168 // size is specified by a constant expression that is 2169 // value-dependent, 2170 ArrayType(TypeClass tc, QualType et, QualType can, 2171 ArraySizeModifier sm, unsigned tq, 2172 bool ContainsUnexpandedParameterPack) 2173 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray, 2174 et->isInstantiationDependentType() || tc == DependentSizedArray, 2175 (tc == VariableArray || et->isVariablyModifiedType()), 2176 ContainsUnexpandedParameterPack), 2177 ElementType(et) { 2178 ArrayTypeBits.IndexTypeQuals = tq; 2179 ArrayTypeBits.SizeModifier = sm; 2180 } 2181 2182 friend class ASTContext; // ASTContext creates these. 2183 2184public: 2185 QualType getElementType() const { return ElementType; } 2186 ArraySizeModifier getSizeModifier() const { 2187 return ArraySizeModifier(ArrayTypeBits.SizeModifier); 2188 } 2189 Qualifiers getIndexTypeQualifiers() const { 2190 return Qualifiers::fromCVRMask(getIndexTypeCVRQualifiers()); 2191 } 2192 unsigned getIndexTypeCVRQualifiers() const { 2193 return ArrayTypeBits.IndexTypeQuals; 2194 } 2195 2196 static bool classof(const Type *T) { 2197 return T->getTypeClass() == ConstantArray || 2198 T->getTypeClass() == VariableArray || 2199 T->getTypeClass() == IncompleteArray || 2200 T->getTypeClass() == DependentSizedArray; 2201 } 2202}; 2203 2204/// ConstantArrayType - This class represents the canonical version of 2205/// C arrays with a specified constant size. For example, the canonical 2206/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 2207/// type is 'int' and the size is 404. 2208class ConstantArrayType : public ArrayType { 2209 llvm::APInt Size; // Allows us to unique the type. 2210 2211 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 2212 ArraySizeModifier sm, unsigned tq) 2213 : ArrayType(ConstantArray, et, can, sm, tq, 2214 et->containsUnexpandedParameterPack()), 2215 Size(size) {} 2216protected: 2217 ConstantArrayType(TypeClass tc, QualType et, QualType can, 2218 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 2219 : ArrayType(tc, et, can, sm, tq, et->containsUnexpandedParameterPack()), 2220 Size(size) {} 2221 friend class ASTContext; // ASTContext creates these. 2222public: 2223 const llvm::APInt &getSize() const { return Size; } 2224 bool isSugared() const { return false; } 2225 QualType desugar() const { return QualType(this, 0); } 2226 2227 2228 /// \brief Determine the number of bits required to address a member of 2229 // an array with the given element type and number of elements. 2230 static unsigned getNumAddressingBits(ASTContext &Context, 2231 QualType ElementType, 2232 const llvm::APInt &NumElements); 2233 2234 /// \brief Determine the maximum number of active bits that an array's size 2235 /// can require, which limits the maximum size of the array. 2236 static unsigned getMaxSizeBits(ASTContext &Context); 2237 2238 void Profile(llvm::FoldingSetNodeID &ID) { 2239 Profile(ID, getElementType(), getSize(), 2240 getSizeModifier(), getIndexTypeCVRQualifiers()); 2241 } 2242 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 2243 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 2244 unsigned TypeQuals) { 2245 ID.AddPointer(ET.getAsOpaquePtr()); 2246 ID.AddInteger(ArraySize.getZExtValue()); 2247 ID.AddInteger(SizeMod); 2248 ID.AddInteger(TypeQuals); 2249 } 2250 static bool classof(const Type *T) { 2251 return T->getTypeClass() == ConstantArray; 2252 } 2253}; 2254 2255/// IncompleteArrayType - This class represents C arrays with an unspecified 2256/// size. For example 'int A[]' has an IncompleteArrayType where the element 2257/// type is 'int' and the size is unspecified. 2258class IncompleteArrayType : public ArrayType { 2259 2260 IncompleteArrayType(QualType et, QualType can, 2261 ArraySizeModifier sm, unsigned tq) 2262 : ArrayType(IncompleteArray, et, can, sm, tq, 2263 et->containsUnexpandedParameterPack()) {} 2264 friend class ASTContext; // ASTContext creates these. 2265public: 2266 bool isSugared() const { return false; } 2267 QualType desugar() const { return QualType(this, 0); } 2268 2269 static bool classof(const Type *T) { 2270 return T->getTypeClass() == IncompleteArray; 2271 } 2272 2273 friend class StmtIteratorBase; 2274 2275 void Profile(llvm::FoldingSetNodeID &ID) { 2276 Profile(ID, getElementType(), getSizeModifier(), 2277 getIndexTypeCVRQualifiers()); 2278 } 2279 2280 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 2281 ArraySizeModifier SizeMod, unsigned TypeQuals) { 2282 ID.AddPointer(ET.getAsOpaquePtr()); 2283 ID.AddInteger(SizeMod); 2284 ID.AddInteger(TypeQuals); 2285 } 2286}; 2287 2288/// VariableArrayType - This class represents C arrays with a specified size 2289/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 2290/// Since the size expression is an arbitrary expression, we store it as such. 2291/// 2292/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 2293/// should not be: two lexically equivalent variable array types could mean 2294/// different things, for example, these variables do not have the same type 2295/// dynamically: 2296/// 2297/// void foo(int x) { 2298/// int Y[x]; 2299/// ++x; 2300/// int Z[x]; 2301/// } 2302/// 2303class VariableArrayType : public ArrayType { 2304 /// SizeExpr - An assignment expression. VLA's are only permitted within 2305 /// a function block. 2306 Stmt *SizeExpr; 2307 /// Brackets - The left and right array brackets. 2308 SourceRange Brackets; 2309 2310 VariableArrayType(QualType et, QualType can, Expr *e, 2311 ArraySizeModifier sm, unsigned tq, 2312 SourceRange brackets) 2313 : ArrayType(VariableArray, et, can, sm, tq, 2314 et->containsUnexpandedParameterPack()), 2315 SizeExpr((Stmt*) e), Brackets(brackets) {} 2316 friend class ASTContext; // ASTContext creates these. 2317 2318public: 2319 Expr *getSizeExpr() const { 2320 // We use C-style casts instead of cast<> here because we do not wish 2321 // to have a dependency of Type.h on Stmt.h/Expr.h. 2322 return (Expr*) SizeExpr; 2323 } 2324 SourceRange getBracketsRange() const { return Brackets; } 2325 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 2326 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 2327 2328 bool isSugared() const { return false; } 2329 QualType desugar() const { return QualType(this, 0); } 2330 2331 static bool classof(const Type *T) { 2332 return T->getTypeClass() == VariableArray; 2333 } 2334 2335 friend class StmtIteratorBase; 2336 2337 void Profile(llvm::FoldingSetNodeID &ID) { 2338 llvm_unreachable("Cannot unique VariableArrayTypes."); 2339 } 2340}; 2341 2342/// DependentSizedArrayType - This type represents an array type in 2343/// C++ whose size is a value-dependent expression. For example: 2344/// 2345/// \code 2346/// template<typename T, int Size> 2347/// class array { 2348/// T data[Size]; 2349/// }; 2350/// \endcode 2351/// 2352/// For these types, we won't actually know what the array bound is 2353/// until template instantiation occurs, at which point this will 2354/// become either a ConstantArrayType or a VariableArrayType. 2355class DependentSizedArrayType : public ArrayType { 2356 const ASTContext &Context; 2357 2358 /// \brief An assignment expression that will instantiate to the 2359 /// size of the array. 2360 /// 2361 /// The expression itself might be NULL, in which case the array 2362 /// type will have its size deduced from an initializer. 2363 Stmt *SizeExpr; 2364 2365 /// Brackets - The left and right array brackets. 2366 SourceRange Brackets; 2367 2368 DependentSizedArrayType(const ASTContext &Context, QualType et, QualType can, 2369 Expr *e, ArraySizeModifier sm, unsigned tq, 2370 SourceRange brackets); 2371 2372 friend class ASTContext; // ASTContext creates these. 2373 2374public: 2375 Expr *getSizeExpr() const { 2376 // We use C-style casts instead of cast<> here because we do not wish 2377 // to have a dependency of Type.h on Stmt.h/Expr.h. 2378 return (Expr*) SizeExpr; 2379 } 2380 SourceRange getBracketsRange() const { return Brackets; } 2381 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 2382 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 2383 2384 bool isSugared() const { return false; } 2385 QualType desugar() const { return QualType(this, 0); } 2386 2387 static bool classof(const Type *T) { 2388 return T->getTypeClass() == DependentSizedArray; 2389 } 2390 2391 friend class StmtIteratorBase; 2392 2393 2394 void Profile(llvm::FoldingSetNodeID &ID) { 2395 Profile(ID, Context, getElementType(), 2396 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 2397 } 2398 2399 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2400 QualType ET, ArraySizeModifier SizeMod, 2401 unsigned TypeQuals, Expr *E); 2402}; 2403 2404/// DependentSizedExtVectorType - This type represent an extended vector type 2405/// where either the type or size is dependent. For example: 2406/// @code 2407/// template<typename T, int Size> 2408/// class vector { 2409/// typedef T __attribute__((ext_vector_type(Size))) type; 2410/// } 2411/// @endcode 2412class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 2413 const ASTContext &Context; 2414 Expr *SizeExpr; 2415 /// ElementType - The element type of the array. 2416 QualType ElementType; 2417 SourceLocation loc; 2418 2419 DependentSizedExtVectorType(const ASTContext &Context, QualType ElementType, 2420 QualType can, Expr *SizeExpr, SourceLocation loc); 2421 2422 friend class ASTContext; 2423 2424public: 2425 Expr *getSizeExpr() const { return SizeExpr; } 2426 QualType getElementType() const { return ElementType; } 2427 SourceLocation getAttributeLoc() const { return loc; } 2428 2429 bool isSugared() const { return false; } 2430 QualType desugar() const { return QualType(this, 0); } 2431 2432 static bool classof(const Type *T) { 2433 return T->getTypeClass() == DependentSizedExtVector; 2434 } 2435 2436 void Profile(llvm::FoldingSetNodeID &ID) { 2437 Profile(ID, Context, getElementType(), getSizeExpr()); 2438 } 2439 2440 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2441 QualType ElementType, Expr *SizeExpr); 2442}; 2443 2444 2445/// VectorType - GCC generic vector type. This type is created using 2446/// __attribute__((vector_size(n)), where "n" specifies the vector size in 2447/// bytes; or from an Altivec __vector or vector declaration. 2448/// Since the constructor takes the number of vector elements, the 2449/// client is responsible for converting the size into the number of elements. 2450class VectorType : public Type, public llvm::FoldingSetNode { 2451public: 2452 enum VectorKind { 2453 GenericVector, // not a target-specific vector type 2454 AltiVecVector, // is AltiVec vector 2455 AltiVecPixel, // is AltiVec 'vector Pixel' 2456 AltiVecBool, // is AltiVec 'vector bool ...' 2457 NeonVector, // is ARM Neon vector 2458 NeonPolyVector // is ARM Neon polynomial vector 2459 }; 2460protected: 2461 /// ElementType - The element type of the vector. 2462 QualType ElementType; 2463 2464 VectorType(QualType vecType, unsigned nElements, QualType canonType, 2465 VectorKind vecKind); 2466 2467 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 2468 QualType canonType, VectorKind vecKind); 2469 2470 friend class ASTContext; // ASTContext creates these. 2471 2472public: 2473 2474 QualType getElementType() const { return ElementType; } 2475 unsigned getNumElements() const { return VectorTypeBits.NumElements; } 2476 2477 bool isSugared() const { return false; } 2478 QualType desugar() const { return QualType(this, 0); } 2479 2480 VectorKind getVectorKind() const { 2481 return VectorKind(VectorTypeBits.VecKind); 2482 } 2483 2484 void Profile(llvm::FoldingSetNodeID &ID) { 2485 Profile(ID, getElementType(), getNumElements(), 2486 getTypeClass(), getVectorKind()); 2487 } 2488 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 2489 unsigned NumElements, TypeClass TypeClass, 2490 VectorKind VecKind) { 2491 ID.AddPointer(ElementType.getAsOpaquePtr()); 2492 ID.AddInteger(NumElements); 2493 ID.AddInteger(TypeClass); 2494 ID.AddInteger(VecKind); 2495 } 2496 2497 static bool classof(const Type *T) { 2498 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 2499 } 2500}; 2501 2502/// ExtVectorType - Extended vector type. This type is created using 2503/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 2504/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 2505/// class enables syntactic extensions, like Vector Components for accessing 2506/// points, colors, and textures (modeled after OpenGL Shading Language). 2507class ExtVectorType : public VectorType { 2508 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 2509 VectorType(ExtVector, vecType, nElements, canonType, GenericVector) {} 2510 friend class ASTContext; // ASTContext creates these. 2511public: 2512 static int getPointAccessorIdx(char c) { 2513 switch (c) { 2514 default: return -1; 2515 case 'x': return 0; 2516 case 'y': return 1; 2517 case 'z': return 2; 2518 case 'w': return 3; 2519 } 2520 } 2521 static int getNumericAccessorIdx(char c) { 2522 switch (c) { 2523 default: return -1; 2524 case '0': return 0; 2525 case '1': return 1; 2526 case '2': return 2; 2527 case '3': return 3; 2528 case '4': return 4; 2529 case '5': return 5; 2530 case '6': return 6; 2531 case '7': return 7; 2532 case '8': return 8; 2533 case '9': return 9; 2534 case 'A': 2535 case 'a': return 10; 2536 case 'B': 2537 case 'b': return 11; 2538 case 'C': 2539 case 'c': return 12; 2540 case 'D': 2541 case 'd': return 13; 2542 case 'E': 2543 case 'e': return 14; 2544 case 'F': 2545 case 'f': return 15; 2546 } 2547 } 2548 2549 static int getAccessorIdx(char c) { 2550 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 2551 return getNumericAccessorIdx(c); 2552 } 2553 2554 bool isAccessorWithinNumElements(char c) const { 2555 if (int idx = getAccessorIdx(c)+1) 2556 return unsigned(idx-1) < getNumElements(); 2557 return false; 2558 } 2559 bool isSugared() const { return false; } 2560 QualType desugar() const { return QualType(this, 0); } 2561 2562 static bool classof(const Type *T) { 2563 return T->getTypeClass() == ExtVector; 2564 } 2565}; 2566 2567/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 2568/// class of FunctionNoProtoType and FunctionProtoType. 2569/// 2570class FunctionType : public Type { 2571 // The type returned by the function. 2572 QualType ResultType; 2573 2574 public: 2575 /// ExtInfo - A class which abstracts out some details necessary for 2576 /// making a call. 2577 /// 2578 /// It is not actually used directly for storing this information in 2579 /// a FunctionType, although FunctionType does currently use the 2580 /// same bit-pattern. 2581 /// 2582 // If you add a field (say Foo), other than the obvious places (both, 2583 // constructors, compile failures), what you need to update is 2584 // * Operator== 2585 // * getFoo 2586 // * withFoo 2587 // * functionType. Add Foo, getFoo. 2588 // * ASTContext::getFooType 2589 // * ASTContext::mergeFunctionTypes 2590 // * FunctionNoProtoType::Profile 2591 // * FunctionProtoType::Profile 2592 // * TypePrinter::PrintFunctionProto 2593 // * AST read and write 2594 // * Codegen 2595 class ExtInfo { 2596 // Feel free to rearrange or add bits, but if you go over 9, 2597 // you'll need to adjust both the Bits field below and 2598 // Type::FunctionTypeBitfields. 2599 2600 // | CC |noreturn|produces|regparm| 2601 // |0 .. 3| 4 | 5 | 6 .. 8| 2602 // 2603 // regparm is either 0 (no regparm attribute) or the regparm value+1. 2604 enum { CallConvMask = 0xF }; 2605 enum { NoReturnMask = 0x10 }; 2606 enum { ProducesResultMask = 0x20 }; 2607 enum { RegParmMask = ~(CallConvMask | NoReturnMask | ProducesResultMask), 2608 RegParmOffset = 6 }; // Assumed to be the last field 2609 2610 uint16_t Bits; 2611 2612 ExtInfo(unsigned Bits) : Bits(static_cast<uint16_t>(Bits)) {} 2613 2614 friend class FunctionType; 2615 2616 public: 2617 // Constructor with no defaults. Use this when you know that you 2618 // have all the elements (when reading an AST file for example). 2619 ExtInfo(bool noReturn, bool hasRegParm, unsigned regParm, CallingConv cc, 2620 bool producesResult) { 2621 assert((!hasRegParm || regParm < 7) && "Invalid regparm value"); 2622 Bits = ((unsigned) cc) | 2623 (noReturn ? NoReturnMask : 0) | 2624 (producesResult ? ProducesResultMask : 0) | 2625 (hasRegParm ? ((regParm + 1) << RegParmOffset) : 0); 2626 } 2627 2628 // Constructor with all defaults. Use when for example creating a 2629 // function know to use defaults. 2630 ExtInfo() : Bits(0) {} 2631 2632 bool getNoReturn() const { return Bits & NoReturnMask; } 2633 bool getProducesResult() const { return Bits & ProducesResultMask; } 2634 bool getHasRegParm() const { return (Bits >> RegParmOffset) != 0; } 2635 unsigned getRegParm() const { 2636 unsigned RegParm = Bits >> RegParmOffset; 2637 if (RegParm > 0) 2638 --RegParm; 2639 return RegParm; 2640 } 2641 CallingConv getCC() const { return CallingConv(Bits & CallConvMask); } 2642 2643 bool operator==(ExtInfo Other) const { 2644 return Bits == Other.Bits; 2645 } 2646 bool operator!=(ExtInfo Other) const { 2647 return Bits != Other.Bits; 2648 } 2649 2650 // Note that we don't have setters. That is by design, use 2651 // the following with methods instead of mutating these objects. 2652 2653 ExtInfo withNoReturn(bool noReturn) const { 2654 if (noReturn) 2655 return ExtInfo(Bits | NoReturnMask); 2656 else 2657 return ExtInfo(Bits & ~NoReturnMask); 2658 } 2659 2660 ExtInfo withProducesResult(bool producesResult) const { 2661 if (producesResult) 2662 return ExtInfo(Bits | ProducesResultMask); 2663 else 2664 return ExtInfo(Bits & ~ProducesResultMask); 2665 } 2666 2667 ExtInfo withRegParm(unsigned RegParm) const { 2668 assert(RegParm < 7 && "Invalid regparm value"); 2669 return ExtInfo((Bits & ~RegParmMask) | 2670 ((RegParm + 1) << RegParmOffset)); 2671 } 2672 2673 ExtInfo withCallingConv(CallingConv cc) const { 2674 return ExtInfo((Bits & ~CallConvMask) | (unsigned) cc); 2675 } 2676 2677 void Profile(llvm::FoldingSetNodeID &ID) const { 2678 ID.AddInteger(Bits); 2679 } 2680 }; 2681 2682protected: 2683 FunctionType(TypeClass tc, QualType res, 2684 unsigned typeQuals, QualType Canonical, bool Dependent, 2685 bool InstantiationDependent, 2686 bool VariablyModified, bool ContainsUnexpandedParameterPack, 2687 ExtInfo Info) 2688 : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified, 2689 ContainsUnexpandedParameterPack), 2690 ResultType(res) { 2691 FunctionTypeBits.ExtInfo = Info.Bits; 2692 FunctionTypeBits.TypeQuals = typeQuals; 2693 } 2694 unsigned getTypeQuals() const { return FunctionTypeBits.TypeQuals; } 2695 2696public: 2697 2698 QualType getResultType() const { return ResultType; } 2699 2700 bool getHasRegParm() const { return getExtInfo().getHasRegParm(); } 2701 unsigned getRegParmType() const { return getExtInfo().getRegParm(); } 2702 /// \brief Determine whether this function type includes the GNU noreturn 2703 /// attribute. The C++11 [[noreturn]] attribute does not affect the function 2704 /// type. 2705 bool getNoReturnAttr() const { return getExtInfo().getNoReturn(); } 2706 CallingConv getCallConv() const { return getExtInfo().getCC(); } 2707 ExtInfo getExtInfo() const { return ExtInfo(FunctionTypeBits.ExtInfo); } 2708 bool isConst() const { return getTypeQuals() & Qualifiers::Const; } 2709 bool isVolatile() const { return getTypeQuals() & Qualifiers::Volatile; } 2710 bool isRestrict() const { return getTypeQuals() & Qualifiers::Restrict; } 2711 2712 /// \brief Determine the type of an expression that calls a function of 2713 /// this type. 2714 QualType getCallResultType(ASTContext &Context) const { 2715 return getResultType().getNonLValueExprType(Context); 2716 } 2717 2718 static StringRef getNameForCallConv(CallingConv CC); 2719 2720 static bool classof(const Type *T) { 2721 return T->getTypeClass() == FunctionNoProto || 2722 T->getTypeClass() == FunctionProto; 2723 } 2724}; 2725 2726/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 2727/// no information available about its arguments. 2728class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 2729 FunctionNoProtoType(QualType Result, QualType Canonical, ExtInfo Info) 2730 : FunctionType(FunctionNoProto, Result, 0, Canonical, 2731 /*Dependent=*/false, /*InstantiationDependent=*/false, 2732 Result->isVariablyModifiedType(), 2733 /*ContainsUnexpandedParameterPack=*/false, Info) {} 2734 2735 friend class ASTContext; // ASTContext creates these. 2736 2737public: 2738 // No additional state past what FunctionType provides. 2739 2740 bool isSugared() const { return false; } 2741 QualType desugar() const { return QualType(this, 0); } 2742 2743 void Profile(llvm::FoldingSetNodeID &ID) { 2744 Profile(ID, getResultType(), getExtInfo()); 2745 } 2746 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 2747 ExtInfo Info) { 2748 Info.Profile(ID); 2749 ID.AddPointer(ResultType.getAsOpaquePtr()); 2750 } 2751 2752 static bool classof(const Type *T) { 2753 return T->getTypeClass() == FunctionNoProto; 2754 } 2755}; 2756 2757/// FunctionProtoType - Represents a prototype with argument type info, e.g. 2758/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 2759/// arguments, not as having a single void argument. Such a type can have an 2760/// exception specification, but this specification is not part of the canonical 2761/// type. 2762class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 2763public: 2764 /// ExtProtoInfo - Extra information about a function prototype. 2765 struct ExtProtoInfo { 2766 ExtProtoInfo() : 2767 Variadic(false), HasTrailingReturn(false), TypeQuals(0), 2768 ExceptionSpecType(EST_None), RefQualifier(RQ_None), 2769 NumExceptions(0), Exceptions(0), NoexceptExpr(0), 2770 ExceptionSpecDecl(0), ExceptionSpecTemplate(0), 2771 ConsumedArguments(0) {} 2772 2773 FunctionType::ExtInfo ExtInfo; 2774 bool Variadic : 1; 2775 bool HasTrailingReturn : 1; 2776 unsigned char TypeQuals; 2777 ExceptionSpecificationType ExceptionSpecType; 2778 RefQualifierKind RefQualifier; 2779 unsigned NumExceptions; 2780 const QualType *Exceptions; 2781 Expr *NoexceptExpr; 2782 FunctionDecl *ExceptionSpecDecl; 2783 FunctionDecl *ExceptionSpecTemplate; 2784 const bool *ConsumedArguments; 2785 }; 2786 2787private: 2788 /// \brief Determine whether there are any argument types that 2789 /// contain an unexpanded parameter pack. 2790 static bool containsAnyUnexpandedParameterPack(const QualType *ArgArray, 2791 unsigned numArgs) { 2792 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 2793 if (ArgArray[Idx]->containsUnexpandedParameterPack()) 2794 return true; 2795 2796 return false; 2797 } 2798 2799 FunctionProtoType(QualType result, ArrayRef<QualType> args, 2800 QualType canonical, const ExtProtoInfo &epi); 2801 2802 /// NumArgs - The number of arguments this function has, not counting '...'. 2803 unsigned NumArgs : 15; 2804 2805 /// NumExceptions - The number of types in the exception spec, if any. 2806 unsigned NumExceptions : 9; 2807 2808 /// ExceptionSpecType - The type of exception specification this function has. 2809 unsigned ExceptionSpecType : 3; 2810 2811 /// HasAnyConsumedArgs - Whether this function has any consumed arguments. 2812 unsigned HasAnyConsumedArgs : 1; 2813 2814 /// Variadic - Whether the function is variadic. 2815 unsigned Variadic : 1; 2816 2817 /// HasTrailingReturn - Whether this function has a trailing return type. 2818 unsigned HasTrailingReturn : 1; 2819 2820 /// \brief The ref-qualifier associated with a \c FunctionProtoType. 2821 /// 2822 /// This is a value of type \c RefQualifierKind. 2823 unsigned RefQualifier : 2; 2824 2825 // ArgInfo - There is an variable size array after the class in memory that 2826 // holds the argument types. 2827 2828 // Exceptions - There is another variable size array after ArgInfo that 2829 // holds the exception types. 2830 2831 // NoexceptExpr - Instead of Exceptions, there may be a single Expr* pointing 2832 // to the expression in the noexcept() specifier. 2833 2834 // ExceptionSpecDecl, ExceptionSpecTemplate - Instead of Exceptions, there may 2835 // be a pair of FunctionDecl* pointing to the function which should be used to 2836 // instantiate this function type's exception specification, and the function 2837 // from which it should be instantiated. 2838 2839 // ConsumedArgs - A variable size array, following Exceptions 2840 // and of length NumArgs, holding flags indicating which arguments 2841 // are consumed. This only appears if HasAnyConsumedArgs is true. 2842 2843 friend class ASTContext; // ASTContext creates these. 2844 2845 const bool *getConsumedArgsBuffer() const { 2846 assert(hasAnyConsumedArgs()); 2847 2848 // Find the end of the exceptions. 2849 Expr * const *eh_end = reinterpret_cast<Expr * const *>(arg_type_end()); 2850 if (getExceptionSpecType() != EST_ComputedNoexcept) 2851 eh_end += NumExceptions; 2852 else 2853 eh_end += 1; // NoexceptExpr 2854 2855 return reinterpret_cast<const bool*>(eh_end); 2856 } 2857 2858public: 2859 unsigned getNumArgs() const { return NumArgs; } 2860 QualType getArgType(unsigned i) const { 2861 assert(i < NumArgs && "Invalid argument number!"); 2862 return arg_type_begin()[i]; 2863 } 2864 ArrayRef<QualType> getArgTypes() const { 2865 return ArrayRef<QualType>(arg_type_begin(), arg_type_end()); 2866 } 2867 2868 ExtProtoInfo getExtProtoInfo() const { 2869 ExtProtoInfo EPI; 2870 EPI.ExtInfo = getExtInfo(); 2871 EPI.Variadic = isVariadic(); 2872 EPI.HasTrailingReturn = hasTrailingReturn(); 2873 EPI.ExceptionSpecType = getExceptionSpecType(); 2874 EPI.TypeQuals = static_cast<unsigned char>(getTypeQuals()); 2875 EPI.RefQualifier = getRefQualifier(); 2876 if (EPI.ExceptionSpecType == EST_Dynamic) { 2877 EPI.NumExceptions = NumExceptions; 2878 EPI.Exceptions = exception_begin(); 2879 } else if (EPI.ExceptionSpecType == EST_ComputedNoexcept) { 2880 EPI.NoexceptExpr = getNoexceptExpr(); 2881 } else if (EPI.ExceptionSpecType == EST_Uninstantiated) { 2882 EPI.ExceptionSpecDecl = getExceptionSpecDecl(); 2883 EPI.ExceptionSpecTemplate = getExceptionSpecTemplate(); 2884 } else if (EPI.ExceptionSpecType == EST_Unevaluated) { 2885 EPI.ExceptionSpecDecl = getExceptionSpecDecl(); 2886 } 2887 if (hasAnyConsumedArgs()) 2888 EPI.ConsumedArguments = getConsumedArgsBuffer(); 2889 return EPI; 2890 } 2891 2892 /// \brief Get the kind of exception specification on this function. 2893 ExceptionSpecificationType getExceptionSpecType() const { 2894 return static_cast<ExceptionSpecificationType>(ExceptionSpecType); 2895 } 2896 /// \brief Return whether this function has any kind of exception spec. 2897 bool hasExceptionSpec() const { 2898 return getExceptionSpecType() != EST_None; 2899 } 2900 /// \brief Return whether this function has a dynamic (throw) exception spec. 2901 bool hasDynamicExceptionSpec() const { 2902 return isDynamicExceptionSpec(getExceptionSpecType()); 2903 } 2904 /// \brief Return whether this function has a noexcept exception spec. 2905 bool hasNoexceptExceptionSpec() const { 2906 return isNoexceptExceptionSpec(getExceptionSpecType()); 2907 } 2908 /// \brief Result type of getNoexceptSpec(). 2909 enum NoexceptResult { 2910 NR_NoNoexcept, ///< There is no noexcept specifier. 2911 NR_BadNoexcept, ///< The noexcept specifier has a bad expression. 2912 NR_Dependent, ///< The noexcept specifier is dependent. 2913 NR_Throw, ///< The noexcept specifier evaluates to false. 2914 NR_Nothrow ///< The noexcept specifier evaluates to true. 2915 }; 2916 /// \brief Get the meaning of the noexcept spec on this function, if any. 2917 NoexceptResult getNoexceptSpec(ASTContext &Ctx) const; 2918 unsigned getNumExceptions() const { return NumExceptions; } 2919 QualType getExceptionType(unsigned i) const { 2920 assert(i < NumExceptions && "Invalid exception number!"); 2921 return exception_begin()[i]; 2922 } 2923 Expr *getNoexceptExpr() const { 2924 if (getExceptionSpecType() != EST_ComputedNoexcept) 2925 return 0; 2926 // NoexceptExpr sits where the arguments end. 2927 return *reinterpret_cast<Expr *const *>(arg_type_end()); 2928 } 2929 /// \brief If this function type has an exception specification which hasn't 2930 /// been determined yet (either because it has not been evaluated or because 2931 /// it has not been instantiated), this is the function whose exception 2932 /// specification is represented by this type. 2933 FunctionDecl *getExceptionSpecDecl() const { 2934 if (getExceptionSpecType() != EST_Uninstantiated && 2935 getExceptionSpecType() != EST_Unevaluated) 2936 return 0; 2937 return reinterpret_cast<FunctionDecl * const *>(arg_type_end())[0]; 2938 } 2939 /// \brief If this function type has an uninstantiated exception 2940 /// specification, this is the function whose exception specification 2941 /// should be instantiated to find the exception specification for 2942 /// this type. 2943 FunctionDecl *getExceptionSpecTemplate() const { 2944 if (getExceptionSpecType() != EST_Uninstantiated) 2945 return 0; 2946 return reinterpret_cast<FunctionDecl * const *>(arg_type_end())[1]; 2947 } 2948 bool isNothrow(ASTContext &Ctx) const { 2949 ExceptionSpecificationType EST = getExceptionSpecType(); 2950 assert(EST != EST_Unevaluated && EST != EST_Uninstantiated); 2951 if (EST == EST_DynamicNone || EST == EST_BasicNoexcept) 2952 return true; 2953 if (EST != EST_ComputedNoexcept) 2954 return false; 2955 return getNoexceptSpec(Ctx) == NR_Nothrow; 2956 } 2957 2958 bool isVariadic() const { return Variadic; } 2959 2960 /// \brief Determines whether this function prototype contains a 2961 /// parameter pack at the end. 2962 /// 2963 /// A function template whose last parameter is a parameter pack can be 2964 /// called with an arbitrary number of arguments, much like a variadic 2965 /// function. 2966 bool isTemplateVariadic() const; 2967 2968 bool hasTrailingReturn() const { return HasTrailingReturn; } 2969 2970 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 2971 2972 2973 /// \brief Retrieve the ref-qualifier associated with this function type. 2974 RefQualifierKind getRefQualifier() const { 2975 return static_cast<RefQualifierKind>(RefQualifier); 2976 } 2977 2978 typedef const QualType *arg_type_iterator; 2979 arg_type_iterator arg_type_begin() const { 2980 return reinterpret_cast<const QualType *>(this+1); 2981 } 2982 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 2983 2984 typedef const QualType *exception_iterator; 2985 exception_iterator exception_begin() const { 2986 // exceptions begin where arguments end 2987 return arg_type_end(); 2988 } 2989 exception_iterator exception_end() const { 2990 if (getExceptionSpecType() != EST_Dynamic) 2991 return exception_begin(); 2992 return exception_begin() + NumExceptions; 2993 } 2994 2995 bool hasAnyConsumedArgs() const { 2996 return HasAnyConsumedArgs; 2997 } 2998 bool isArgConsumed(unsigned I) const { 2999 assert(I < getNumArgs() && "argument index out of range!"); 3000 if (hasAnyConsumedArgs()) 3001 return getConsumedArgsBuffer()[I]; 3002 return false; 3003 } 3004 3005 bool isSugared() const { return false; } 3006 QualType desugar() const { return QualType(this, 0); } 3007 3008 void printExceptionSpecification(raw_ostream &OS, 3009 const PrintingPolicy &Policy) const; 3010 3011 static bool classof(const Type *T) { 3012 return T->getTypeClass() == FunctionProto; 3013 } 3014 3015 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx); 3016 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 3017 arg_type_iterator ArgTys, unsigned NumArgs, 3018 const ExtProtoInfo &EPI, const ASTContext &Context); 3019}; 3020 3021 3022/// \brief Represents the dependent type named by a dependently-scoped 3023/// typename using declaration, e.g. 3024/// using typename Base<T>::foo; 3025/// Template instantiation turns these into the underlying type. 3026class UnresolvedUsingType : public Type { 3027 UnresolvedUsingTypenameDecl *Decl; 3028 3029 UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) 3030 : Type(UnresolvedUsing, QualType(), true, true, false, 3031 /*ContainsUnexpandedParameterPack=*/false), 3032 Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} 3033 friend class ASTContext; // ASTContext creates these. 3034public: 3035 3036 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 3037 3038 bool isSugared() const { return false; } 3039 QualType desugar() const { return QualType(this, 0); } 3040 3041 static bool classof(const Type *T) { 3042 return T->getTypeClass() == UnresolvedUsing; 3043 } 3044 3045 void Profile(llvm::FoldingSetNodeID &ID) { 3046 return Profile(ID, Decl); 3047 } 3048 static void Profile(llvm::FoldingSetNodeID &ID, 3049 UnresolvedUsingTypenameDecl *D) { 3050 ID.AddPointer(D); 3051 } 3052}; 3053 3054 3055class TypedefType : public Type { 3056 TypedefNameDecl *Decl; 3057protected: 3058 TypedefType(TypeClass tc, const TypedefNameDecl *D, QualType can) 3059 : Type(tc, can, can->isDependentType(), 3060 can->isInstantiationDependentType(), 3061 can->isVariablyModifiedType(), 3062 /*ContainsUnexpandedParameterPack=*/false), 3063 Decl(const_cast<TypedefNameDecl*>(D)) { 3064 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 3065 } 3066 friend class ASTContext; // ASTContext creates these. 3067public: 3068 3069 TypedefNameDecl *getDecl() const { return Decl; } 3070 3071 bool isSugared() const { return true; } 3072 QualType desugar() const; 3073 3074 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 3075}; 3076 3077/// TypeOfExprType (GCC extension). 3078class TypeOfExprType : public Type { 3079 Expr *TOExpr; 3080 3081protected: 3082 TypeOfExprType(Expr *E, QualType can = QualType()); 3083 friend class ASTContext; // ASTContext creates these. 3084public: 3085 Expr *getUnderlyingExpr() const { return TOExpr; } 3086 3087 /// \brief Remove a single level of sugar. 3088 QualType desugar() const; 3089 3090 /// \brief Returns whether this type directly provides sugar. 3091 bool isSugared() const; 3092 3093 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 3094}; 3095 3096/// \brief Internal representation of canonical, dependent 3097/// typeof(expr) types. 3098/// 3099/// This class is used internally by the ASTContext to manage 3100/// canonical, dependent types, only. Clients will only see instances 3101/// of this class via TypeOfExprType nodes. 3102class DependentTypeOfExprType 3103 : public TypeOfExprType, public llvm::FoldingSetNode { 3104 const ASTContext &Context; 3105 3106public: 3107 DependentTypeOfExprType(const ASTContext &Context, Expr *E) 3108 : TypeOfExprType(E), Context(Context) { } 3109 3110 void Profile(llvm::FoldingSetNodeID &ID) { 3111 Profile(ID, Context, getUnderlyingExpr()); 3112 } 3113 3114 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 3115 Expr *E); 3116}; 3117 3118/// TypeOfType (GCC extension). 3119class TypeOfType : public Type { 3120 QualType TOType; 3121 TypeOfType(QualType T, QualType can) 3122 : Type(TypeOf, can, T->isDependentType(), 3123 T->isInstantiationDependentType(), 3124 T->isVariablyModifiedType(), 3125 T->containsUnexpandedParameterPack()), 3126 TOType(T) { 3127 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 3128 } 3129 friend class ASTContext; // ASTContext creates these. 3130public: 3131 QualType getUnderlyingType() const { return TOType; } 3132 3133 /// \brief Remove a single level of sugar. 3134 QualType desugar() const { return getUnderlyingType(); } 3135 3136 /// \brief Returns whether this type directly provides sugar. 3137 bool isSugared() const { return true; } 3138 3139 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 3140}; 3141 3142/// DecltypeType (C++0x) 3143class DecltypeType : public Type { 3144 Expr *E; 3145 QualType UnderlyingType; 3146 3147protected: 3148 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 3149 friend class ASTContext; // ASTContext creates these. 3150public: 3151 Expr *getUnderlyingExpr() const { return E; } 3152 QualType getUnderlyingType() const { return UnderlyingType; } 3153 3154 /// \brief Remove a single level of sugar. 3155 QualType desugar() const; 3156 3157 /// \brief Returns whether this type directly provides sugar. 3158 bool isSugared() const; 3159 3160 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 3161}; 3162 3163/// \brief Internal representation of canonical, dependent 3164/// decltype(expr) types. 3165/// 3166/// This class is used internally by the ASTContext to manage 3167/// canonical, dependent types, only. Clients will only see instances 3168/// of this class via DecltypeType nodes. 3169class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 3170 const ASTContext &Context; 3171 3172public: 3173 DependentDecltypeType(const ASTContext &Context, Expr *E); 3174 3175 void Profile(llvm::FoldingSetNodeID &ID) { 3176 Profile(ID, Context, getUnderlyingExpr()); 3177 } 3178 3179 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 3180 Expr *E); 3181}; 3182 3183/// \brief A unary type transform, which is a type constructed from another 3184class UnaryTransformType : public Type { 3185public: 3186 enum UTTKind { 3187 EnumUnderlyingType 3188 }; 3189 3190private: 3191 /// The untransformed type. 3192 QualType BaseType; 3193 /// The transformed type if not dependent, otherwise the same as BaseType. 3194 QualType UnderlyingType; 3195 3196 UTTKind UKind; 3197protected: 3198 UnaryTransformType(QualType BaseTy, QualType UnderlyingTy, UTTKind UKind, 3199 QualType CanonicalTy); 3200 friend class ASTContext; 3201public: 3202 bool isSugared() const { return !isDependentType(); } 3203 QualType desugar() const { return UnderlyingType; } 3204 3205 QualType getUnderlyingType() const { return UnderlyingType; } 3206 QualType getBaseType() const { return BaseType; } 3207 3208 UTTKind getUTTKind() const { return UKind; } 3209 3210 static bool classof(const Type *T) { 3211 return T->getTypeClass() == UnaryTransform; 3212 } 3213}; 3214 3215class TagType : public Type { 3216 /// Stores the TagDecl associated with this type. The decl may point to any 3217 /// TagDecl that declares the entity. 3218 TagDecl * decl; 3219 3220 friend class ASTReader; 3221 3222protected: 3223 TagType(TypeClass TC, const TagDecl *D, QualType can); 3224 3225public: 3226 TagDecl *getDecl() const; 3227 3228 /// @brief Determines whether this type is in the process of being 3229 /// defined. 3230 bool isBeingDefined() const; 3231 3232 static bool classof(const Type *T) { 3233 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 3234 } 3235}; 3236 3237/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 3238/// to detect TagType objects of structs/unions/classes. 3239class RecordType : public TagType { 3240protected: 3241 explicit RecordType(const RecordDecl *D) 3242 : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3243 explicit RecordType(TypeClass TC, RecordDecl *D) 3244 : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3245 friend class ASTContext; // ASTContext creates these. 3246public: 3247 3248 RecordDecl *getDecl() const { 3249 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 3250 } 3251 3252 // FIXME: This predicate is a helper to QualType/Type. It needs to 3253 // recursively check all fields for const-ness. If any field is declared 3254 // const, it needs to return false. 3255 bool hasConstFields() const { return false; } 3256 3257 bool isSugared() const { return false; } 3258 QualType desugar() const { return QualType(this, 0); } 3259 3260 static bool classof(const Type *T) { return T->getTypeClass() == Record; } 3261}; 3262 3263/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 3264/// to detect TagType objects of enums. 3265class EnumType : public TagType { 3266 explicit EnumType(const EnumDecl *D) 3267 : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3268 friend class ASTContext; // ASTContext creates these. 3269public: 3270 3271 EnumDecl *getDecl() const { 3272 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 3273 } 3274 3275 bool isSugared() const { return false; } 3276 QualType desugar() const { return QualType(this, 0); } 3277 3278 static bool classof(const Type *T) { return T->getTypeClass() == Enum; } 3279}; 3280 3281/// AttributedType - An attributed type is a type to which a type 3282/// attribute has been applied. The "modified type" is the 3283/// fully-sugared type to which the attributed type was applied; 3284/// generally it is not canonically equivalent to the attributed type. 3285/// The "equivalent type" is the minimally-desugared type which the 3286/// type is canonically equivalent to. 3287/// 3288/// For example, in the following attributed type: 3289/// int32_t __attribute__((vector_size(16))) 3290/// - the modified type is the TypedefType for int32_t 3291/// - the equivalent type is VectorType(16, int32_t) 3292/// - the canonical type is VectorType(16, int) 3293class AttributedType : public Type, public llvm::FoldingSetNode { 3294public: 3295 // It is really silly to have yet another attribute-kind enum, but 3296 // clang::attr::Kind doesn't currently cover the pure type attrs. 3297 enum Kind { 3298 // Expression operand. 3299 attr_address_space, 3300 attr_regparm, 3301 attr_vector_size, 3302 attr_neon_vector_type, 3303 attr_neon_polyvector_type, 3304 3305 FirstExprOperandKind = attr_address_space, 3306 LastExprOperandKind = attr_neon_polyvector_type, 3307 3308 // Enumerated operand (string or keyword). 3309 attr_objc_gc, 3310 attr_objc_ownership, 3311 attr_pcs, 3312 3313 FirstEnumOperandKind = attr_objc_gc, 3314 LastEnumOperandKind = attr_pcs, 3315 3316 // No operand. 3317 attr_noreturn, 3318 attr_cdecl, 3319 attr_fastcall, 3320 attr_stdcall, 3321 attr_thiscall, 3322 attr_pascal, 3323 attr_pnaclcall, 3324 attr_inteloclbicc 3325 }; 3326 3327private: 3328 QualType ModifiedType; 3329 QualType EquivalentType; 3330 3331 friend class ASTContext; // creates these 3332 3333 AttributedType(QualType canon, Kind attrKind, 3334 QualType modified, QualType equivalent) 3335 : Type(Attributed, canon, canon->isDependentType(), 3336 canon->isInstantiationDependentType(), 3337 canon->isVariablyModifiedType(), 3338 canon->containsUnexpandedParameterPack()), 3339 ModifiedType(modified), EquivalentType(equivalent) { 3340 AttributedTypeBits.AttrKind = attrKind; 3341 } 3342 3343public: 3344 Kind getAttrKind() const { 3345 return static_cast<Kind>(AttributedTypeBits.AttrKind); 3346 } 3347 3348 QualType getModifiedType() const { return ModifiedType; } 3349 QualType getEquivalentType() const { return EquivalentType; } 3350 3351 bool isSugared() const { return true; } 3352 QualType desugar() const { return getEquivalentType(); } 3353 3354 void Profile(llvm::FoldingSetNodeID &ID) { 3355 Profile(ID, getAttrKind(), ModifiedType, EquivalentType); 3356 } 3357 3358 static void Profile(llvm::FoldingSetNodeID &ID, Kind attrKind, 3359 QualType modified, QualType equivalent) { 3360 ID.AddInteger(attrKind); 3361 ID.AddPointer(modified.getAsOpaquePtr()); 3362 ID.AddPointer(equivalent.getAsOpaquePtr()); 3363 } 3364 3365 static bool classof(const Type *T) { 3366 return T->getTypeClass() == Attributed; 3367 } 3368}; 3369 3370class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 3371 // Helper data collector for canonical types. 3372 struct CanonicalTTPTInfo { 3373 unsigned Depth : 15; 3374 unsigned ParameterPack : 1; 3375 unsigned Index : 16; 3376 }; 3377 3378 union { 3379 // Info for the canonical type. 3380 CanonicalTTPTInfo CanTTPTInfo; 3381 // Info for the non-canonical type. 3382 TemplateTypeParmDecl *TTPDecl; 3383 }; 3384 3385 /// Build a non-canonical type. 3386 TemplateTypeParmType(TemplateTypeParmDecl *TTPDecl, QualType Canon) 3387 : Type(TemplateTypeParm, Canon, /*Dependent=*/true, 3388 /*InstantiationDependent=*/true, 3389 /*VariablyModified=*/false, 3390 Canon->containsUnexpandedParameterPack()), 3391 TTPDecl(TTPDecl) { } 3392 3393 /// Build the canonical type. 3394 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 3395 : Type(TemplateTypeParm, QualType(this, 0), 3396 /*Dependent=*/true, 3397 /*InstantiationDependent=*/true, 3398 /*VariablyModified=*/false, PP) { 3399 CanTTPTInfo.Depth = D; 3400 CanTTPTInfo.Index = I; 3401 CanTTPTInfo.ParameterPack = PP; 3402 } 3403 3404 friend class ASTContext; // ASTContext creates these 3405 3406 const CanonicalTTPTInfo& getCanTTPTInfo() const { 3407 QualType Can = getCanonicalTypeInternal(); 3408 return Can->castAs<TemplateTypeParmType>()->CanTTPTInfo; 3409 } 3410 3411public: 3412 unsigned getDepth() const { return getCanTTPTInfo().Depth; } 3413 unsigned getIndex() const { return getCanTTPTInfo().Index; } 3414 bool isParameterPack() const { return getCanTTPTInfo().ParameterPack; } 3415 3416 TemplateTypeParmDecl *getDecl() const { 3417 return isCanonicalUnqualified() ? 0 : TTPDecl; 3418 } 3419 3420 IdentifierInfo *getIdentifier() const; 3421 3422 bool isSugared() const { return false; } 3423 QualType desugar() const { return QualType(this, 0); } 3424 3425 void Profile(llvm::FoldingSetNodeID &ID) { 3426 Profile(ID, getDepth(), getIndex(), isParameterPack(), getDecl()); 3427 } 3428 3429 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 3430 unsigned Index, bool ParameterPack, 3431 TemplateTypeParmDecl *TTPDecl) { 3432 ID.AddInteger(Depth); 3433 ID.AddInteger(Index); 3434 ID.AddBoolean(ParameterPack); 3435 ID.AddPointer(TTPDecl); 3436 } 3437 3438 static bool classof(const Type *T) { 3439 return T->getTypeClass() == TemplateTypeParm; 3440 } 3441}; 3442 3443/// \brief Represents the result of substituting a type for a template 3444/// type parameter. 3445/// 3446/// Within an instantiated template, all template type parameters have 3447/// been replaced with these. They are used solely to record that a 3448/// type was originally written as a template type parameter; 3449/// therefore they are never canonical. 3450class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 3451 // The original type parameter. 3452 const TemplateTypeParmType *Replaced; 3453 3454 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 3455 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType(), 3456 Canon->isInstantiationDependentType(), 3457 Canon->isVariablyModifiedType(), 3458 Canon->containsUnexpandedParameterPack()), 3459 Replaced(Param) { } 3460 3461 friend class ASTContext; 3462 3463public: 3464 /// Gets the template parameter that was substituted for. 3465 const TemplateTypeParmType *getReplacedParameter() const { 3466 return Replaced; 3467 } 3468 3469 /// Gets the type that was substituted for the template 3470 /// parameter. 3471 QualType getReplacementType() const { 3472 return getCanonicalTypeInternal(); 3473 } 3474 3475 bool isSugared() const { return true; } 3476 QualType desugar() const { return getReplacementType(); } 3477 3478 void Profile(llvm::FoldingSetNodeID &ID) { 3479 Profile(ID, getReplacedParameter(), getReplacementType()); 3480 } 3481 static void Profile(llvm::FoldingSetNodeID &ID, 3482 const TemplateTypeParmType *Replaced, 3483 QualType Replacement) { 3484 ID.AddPointer(Replaced); 3485 ID.AddPointer(Replacement.getAsOpaquePtr()); 3486 } 3487 3488 static bool classof(const Type *T) { 3489 return T->getTypeClass() == SubstTemplateTypeParm; 3490 } 3491}; 3492 3493/// \brief Represents the result of substituting a set of types for a template 3494/// type parameter pack. 3495/// 3496/// When a pack expansion in the source code contains multiple parameter packs 3497/// and those parameter packs correspond to different levels of template 3498/// parameter lists, this type node is used to represent a template type 3499/// parameter pack from an outer level, which has already had its argument pack 3500/// substituted but that still lives within a pack expansion that itself 3501/// could not be instantiated. When actually performing a substitution into 3502/// that pack expansion (e.g., when all template parameters have corresponding 3503/// arguments), this type will be replaced with the \c SubstTemplateTypeParmType 3504/// at the current pack substitution index. 3505class SubstTemplateTypeParmPackType : public Type, public llvm::FoldingSetNode { 3506 /// \brief The original type parameter. 3507 const TemplateTypeParmType *Replaced; 3508 3509 /// \brief A pointer to the set of template arguments that this 3510 /// parameter pack is instantiated with. 3511 const TemplateArgument *Arguments; 3512 3513 /// \brief The number of template arguments in \c Arguments. 3514 unsigned NumArguments; 3515 3516 SubstTemplateTypeParmPackType(const TemplateTypeParmType *Param, 3517 QualType Canon, 3518 const TemplateArgument &ArgPack); 3519 3520 friend class ASTContext; 3521 3522public: 3523 IdentifierInfo *getIdentifier() const { return Replaced->getIdentifier(); } 3524 3525 /// Gets the template parameter that was substituted for. 3526 const TemplateTypeParmType *getReplacedParameter() const { 3527 return Replaced; 3528 } 3529 3530 bool isSugared() const { return false; } 3531 QualType desugar() const { return QualType(this, 0); } 3532 3533 TemplateArgument getArgumentPack() const; 3534 3535 void Profile(llvm::FoldingSetNodeID &ID); 3536 static void Profile(llvm::FoldingSetNodeID &ID, 3537 const TemplateTypeParmType *Replaced, 3538 const TemplateArgument &ArgPack); 3539 3540 static bool classof(const Type *T) { 3541 return T->getTypeClass() == SubstTemplateTypeParmPack; 3542 } 3543}; 3544 3545/// \brief Represents a C++0x auto type. 3546/// 3547/// These types are usually a placeholder for a deduced type. However, within 3548/// templates and before the initializer is attached, there is no deduced type 3549/// and an auto type is type-dependent and canonical. 3550class AutoType : public Type, public llvm::FoldingSetNode { 3551 AutoType(QualType DeducedType) 3552 : Type(Auto, DeducedType.isNull() ? QualType(this, 0) : DeducedType, 3553 /*Dependent=*/DeducedType.isNull(), 3554 /*InstantiationDependent=*/DeducedType.isNull(), 3555 /*VariablyModified=*/false, /*ContainsParameterPack=*/false) { 3556 assert((DeducedType.isNull() || !DeducedType->isDependentType()) && 3557 "deduced a dependent type for auto"); 3558 } 3559 3560 friend class ASTContext; // ASTContext creates these 3561 3562public: 3563 bool isSugared() const { return isDeduced(); } 3564 QualType desugar() const { return getCanonicalTypeInternal(); } 3565 3566 QualType getDeducedType() const { 3567 return isDeduced() ? getCanonicalTypeInternal() : QualType(); 3568 } 3569 bool isDeduced() const { 3570 return !isDependentType(); 3571 } 3572 3573 void Profile(llvm::FoldingSetNodeID &ID) { 3574 Profile(ID, getDeducedType()); 3575 } 3576 3577 static void Profile(llvm::FoldingSetNodeID &ID, 3578 QualType Deduced) { 3579 ID.AddPointer(Deduced.getAsOpaquePtr()); 3580 } 3581 3582 static bool classof(const Type *T) { 3583 return T->getTypeClass() == Auto; 3584 } 3585}; 3586 3587/// \brief Represents a type template specialization; the template 3588/// must be a class template, a type alias template, or a template 3589/// template parameter. A template which cannot be resolved to one of 3590/// these, e.g. because it is written with a dependent scope 3591/// specifier, is instead represented as a 3592/// @c DependentTemplateSpecializationType. 3593/// 3594/// A non-dependent template specialization type is always "sugar", 3595/// typically for a @c RecordType. For example, a class template 3596/// specialization type of @c vector<int> will refer to a tag type for 3597/// the instantiation @c std::vector<int, std::allocator<int>> 3598/// 3599/// Template specializations are dependent if either the template or 3600/// any of the template arguments are dependent, in which case the 3601/// type may also be canonical. 3602/// 3603/// Instances of this type are allocated with a trailing array of 3604/// TemplateArguments, followed by a QualType representing the 3605/// non-canonical aliased type when the template is a type alias 3606/// template. 3607class TemplateSpecializationType 3608 : public Type, public llvm::FoldingSetNode { 3609 /// \brief The name of the template being specialized. This is 3610 /// either a TemplateName::Template (in which case it is a 3611 /// ClassTemplateDecl*, a TemplateTemplateParmDecl*, or a 3612 /// TypeAliasTemplateDecl*), a 3613 /// TemplateName::SubstTemplateTemplateParmPack, or a 3614 /// TemplateName::SubstTemplateTemplateParm (in which case the 3615 /// replacement must, recursively, be one of these). 3616 TemplateName Template; 3617 3618 /// \brief - The number of template arguments named in this class 3619 /// template specialization. 3620 unsigned NumArgs : 31; 3621 3622 /// \brief Whether this template specialization type is a substituted 3623 /// type alias. 3624 bool TypeAlias : 1; 3625 3626 TemplateSpecializationType(TemplateName T, 3627 const TemplateArgument *Args, 3628 unsigned NumArgs, QualType Canon, 3629 QualType Aliased); 3630 3631 friend class ASTContext; // ASTContext creates these 3632 3633public: 3634 /// \brief Determine whether any of the given template arguments are 3635 /// dependent. 3636 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 3637 unsigned NumArgs, 3638 bool &InstantiationDependent); 3639 3640 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 3641 unsigned NumArgs, 3642 bool &InstantiationDependent); 3643 3644 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &, 3645 bool &InstantiationDependent); 3646 3647 /// \brief Print a template argument list, including the '<' and '>' 3648 /// enclosing the template arguments. 3649 static void PrintTemplateArgumentList(raw_ostream &OS, 3650 const TemplateArgument *Args, 3651 unsigned NumArgs, 3652 const PrintingPolicy &Policy, 3653 bool SkipBrackets = false); 3654 3655 static void PrintTemplateArgumentList(raw_ostream &OS, 3656 const TemplateArgumentLoc *Args, 3657 unsigned NumArgs, 3658 const PrintingPolicy &Policy); 3659 3660 static void PrintTemplateArgumentList(raw_ostream &OS, 3661 const TemplateArgumentListInfo &, 3662 const PrintingPolicy &Policy); 3663 3664 /// True if this template specialization type matches a current 3665 /// instantiation in the context in which it is found. 3666 bool isCurrentInstantiation() const { 3667 return isa<InjectedClassNameType>(getCanonicalTypeInternal()); 3668 } 3669 3670 /// \brief Determine if this template specialization type is for a type alias 3671 /// template that has been substituted. 3672 /// 3673 /// Nearly every template specialization type whose template is an alias 3674 /// template will be substituted. However, this is not the case when 3675 /// the specialization contains a pack expansion but the template alias 3676 /// does not have a corresponding parameter pack, e.g., 3677 /// 3678 /// \code 3679 /// template<typename T, typename U, typename V> struct S; 3680 /// template<typename T, typename U> using A = S<T, int, U>; 3681 /// template<typename... Ts> struct X { 3682 /// typedef A<Ts...> type; // not a type alias 3683 /// }; 3684 /// \endcode 3685 bool isTypeAlias() const { return TypeAlias; } 3686 3687 /// Get the aliased type, if this is a specialization of a type alias 3688 /// template. 3689 QualType getAliasedType() const { 3690 assert(isTypeAlias() && "not a type alias template specialization"); 3691 return *reinterpret_cast<const QualType*>(end()); 3692 } 3693 3694 typedef const TemplateArgument * iterator; 3695 3696 iterator begin() const { return getArgs(); } 3697 iterator end() const; // defined inline in TemplateBase.h 3698 3699 /// \brief Retrieve the name of the template that we are specializing. 3700 TemplateName getTemplateName() const { return Template; } 3701 3702 /// \brief Retrieve the template arguments. 3703 const TemplateArgument *getArgs() const { 3704 return reinterpret_cast<const TemplateArgument *>(this + 1); 3705 } 3706 3707 /// \brief Retrieve the number of template arguments. 3708 unsigned getNumArgs() const { return NumArgs; } 3709 3710 /// \brief Retrieve a specific template argument as a type. 3711 /// \pre @c isArgType(Arg) 3712 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 3713 3714 bool isSugared() const { 3715 return !isDependentType() || isCurrentInstantiation() || isTypeAlias(); 3716 } 3717 QualType desugar() const { return getCanonicalTypeInternal(); } 3718 3719 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) { 3720 Profile(ID, Template, getArgs(), NumArgs, Ctx); 3721 if (isTypeAlias()) 3722 getAliasedType().Profile(ID); 3723 } 3724 3725 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 3726 const TemplateArgument *Args, 3727 unsigned NumArgs, 3728 const ASTContext &Context); 3729 3730 static bool classof(const Type *T) { 3731 return T->getTypeClass() == TemplateSpecialization; 3732 } 3733}; 3734 3735/// \brief The injected class name of a C++ class template or class 3736/// template partial specialization. Used to record that a type was 3737/// spelled with a bare identifier rather than as a template-id; the 3738/// equivalent for non-templated classes is just RecordType. 3739/// 3740/// Injected class name types are always dependent. Template 3741/// instantiation turns these into RecordTypes. 3742/// 3743/// Injected class name types are always canonical. This works 3744/// because it is impossible to compare an injected class name type 3745/// with the corresponding non-injected template type, for the same 3746/// reason that it is impossible to directly compare template 3747/// parameters from different dependent contexts: injected class name 3748/// types can only occur within the scope of a particular templated 3749/// declaration, and within that scope every template specialization 3750/// will canonicalize to the injected class name (when appropriate 3751/// according to the rules of the language). 3752class InjectedClassNameType : public Type { 3753 CXXRecordDecl *Decl; 3754 3755 /// The template specialization which this type represents. 3756 /// For example, in 3757 /// template <class T> class A { ... }; 3758 /// this is A<T>, whereas in 3759 /// template <class X, class Y> class A<B<X,Y> > { ... }; 3760 /// this is A<B<X,Y> >. 3761 /// 3762 /// It is always unqualified, always a template specialization type, 3763 /// and always dependent. 3764 QualType InjectedType; 3765 3766 friend class ASTContext; // ASTContext creates these. 3767 friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not 3768 // currently suitable for AST reading, too much 3769 // interdependencies. 3770 InjectedClassNameType(CXXRecordDecl *D, QualType TST) 3771 : Type(InjectedClassName, QualType(), /*Dependent=*/true, 3772 /*InstantiationDependent=*/true, 3773 /*VariablyModified=*/false, 3774 /*ContainsUnexpandedParameterPack=*/false), 3775 Decl(D), InjectedType(TST) { 3776 assert(isa<TemplateSpecializationType>(TST)); 3777 assert(!TST.hasQualifiers()); 3778 assert(TST->isDependentType()); 3779 } 3780 3781public: 3782 QualType getInjectedSpecializationType() const { return InjectedType; } 3783 const TemplateSpecializationType *getInjectedTST() const { 3784 return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); 3785 } 3786 3787 CXXRecordDecl *getDecl() const; 3788 3789 bool isSugared() const { return false; } 3790 QualType desugar() const { return QualType(this, 0); } 3791 3792 static bool classof(const Type *T) { 3793 return T->getTypeClass() == InjectedClassName; 3794 } 3795}; 3796 3797/// \brief The kind of a tag type. 3798enum TagTypeKind { 3799 /// \brief The "struct" keyword. 3800 TTK_Struct, 3801 /// \brief The "__interface" keyword. 3802 TTK_Interface, 3803 /// \brief The "union" keyword. 3804 TTK_Union, 3805 /// \brief The "class" keyword. 3806 TTK_Class, 3807 /// \brief The "enum" keyword. 3808 TTK_Enum 3809}; 3810 3811/// \brief The elaboration keyword that precedes a qualified type name or 3812/// introduces an elaborated-type-specifier. 3813enum ElaboratedTypeKeyword { 3814 /// \brief The "struct" keyword introduces the elaborated-type-specifier. 3815 ETK_Struct, 3816 /// \brief The "__interface" keyword introduces the elaborated-type-specifier. 3817 ETK_Interface, 3818 /// \brief The "union" keyword introduces the elaborated-type-specifier. 3819 ETK_Union, 3820 /// \brief The "class" keyword introduces the elaborated-type-specifier. 3821 ETK_Class, 3822 /// \brief The "enum" keyword introduces the elaborated-type-specifier. 3823 ETK_Enum, 3824 /// \brief The "typename" keyword precedes the qualified type name, e.g., 3825 /// \c typename T::type. 3826 ETK_Typename, 3827 /// \brief No keyword precedes the qualified type name. 3828 ETK_None 3829}; 3830 3831/// A helper class for Type nodes having an ElaboratedTypeKeyword. 3832/// The keyword in stored in the free bits of the base class. 3833/// Also provides a few static helpers for converting and printing 3834/// elaborated type keyword and tag type kind enumerations. 3835class TypeWithKeyword : public Type { 3836protected: 3837 TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, 3838 QualType Canonical, bool Dependent, 3839 bool InstantiationDependent, bool VariablyModified, 3840 bool ContainsUnexpandedParameterPack) 3841 : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified, 3842 ContainsUnexpandedParameterPack) { 3843 TypeWithKeywordBits.Keyword = Keyword; 3844 } 3845 3846public: 3847 ElaboratedTypeKeyword getKeyword() const { 3848 return static_cast<ElaboratedTypeKeyword>(TypeWithKeywordBits.Keyword); 3849 } 3850 3851 /// getKeywordForTypeSpec - Converts a type specifier (DeclSpec::TST) 3852 /// into an elaborated type keyword. 3853 static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); 3854 3855 /// getTagTypeKindForTypeSpec - Converts a type specifier (DeclSpec::TST) 3856 /// into a tag type kind. It is an error to provide a type specifier 3857 /// which *isn't* a tag kind here. 3858 static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); 3859 3860 /// getKeywordForTagDeclKind - Converts a TagTypeKind into an 3861 /// elaborated type keyword. 3862 static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); 3863 3864 /// getTagTypeKindForKeyword - Converts an elaborated type keyword into 3865 // a TagTypeKind. It is an error to provide an elaborated type keyword 3866 /// which *isn't* a tag kind here. 3867 static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); 3868 3869 static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); 3870 3871 static const char *getKeywordName(ElaboratedTypeKeyword Keyword); 3872 3873 static const char *getTagTypeKindName(TagTypeKind Kind) { 3874 return getKeywordName(getKeywordForTagTypeKind(Kind)); 3875 } 3876 3877 class CannotCastToThisType {}; 3878 static CannotCastToThisType classof(const Type *); 3879}; 3880 3881/// \brief Represents a type that was referred to using an elaborated type 3882/// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, 3883/// or both. 3884/// 3885/// This type is used to keep track of a type name as written in the 3886/// source code, including tag keywords and any nested-name-specifiers. 3887/// The type itself is always "sugar", used to express what was written 3888/// in the source code but containing no additional semantic information. 3889class ElaboratedType : public TypeWithKeyword, public llvm::FoldingSetNode { 3890 3891 /// \brief The nested name specifier containing the qualifier. 3892 NestedNameSpecifier *NNS; 3893 3894 /// \brief The type that this qualified name refers to. 3895 QualType NamedType; 3896 3897 ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3898 QualType NamedType, QualType CanonType) 3899 : TypeWithKeyword(Keyword, Elaborated, CanonType, 3900 NamedType->isDependentType(), 3901 NamedType->isInstantiationDependentType(), 3902 NamedType->isVariablyModifiedType(), 3903 NamedType->containsUnexpandedParameterPack()), 3904 NNS(NNS), NamedType(NamedType) { 3905 assert(!(Keyword == ETK_None && NNS == 0) && 3906 "ElaboratedType cannot have elaborated type keyword " 3907 "and name qualifier both null."); 3908 } 3909 3910 friend class ASTContext; // ASTContext creates these 3911 3912public: 3913 ~ElaboratedType(); 3914 3915 /// \brief Retrieve the qualification on this type. 3916 NestedNameSpecifier *getQualifier() const { return NNS; } 3917 3918 /// \brief Retrieve the type named by the qualified-id. 3919 QualType getNamedType() const { return NamedType; } 3920 3921 /// \brief Remove a single level of sugar. 3922 QualType desugar() const { return getNamedType(); } 3923 3924 /// \brief Returns whether this type directly provides sugar. 3925 bool isSugared() const { return true; } 3926 3927 void Profile(llvm::FoldingSetNodeID &ID) { 3928 Profile(ID, getKeyword(), NNS, NamedType); 3929 } 3930 3931 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3932 NestedNameSpecifier *NNS, QualType NamedType) { 3933 ID.AddInteger(Keyword); 3934 ID.AddPointer(NNS); 3935 NamedType.Profile(ID); 3936 } 3937 3938 static bool classof(const Type *T) { 3939 return T->getTypeClass() == Elaborated; 3940 } 3941}; 3942 3943/// \brief Represents a qualified type name for which the type name is 3944/// dependent. 3945/// 3946/// DependentNameType represents a class of dependent types that involve a 3947/// dependent nested-name-specifier (e.g., "T::") followed by a (dependent) 3948/// name of a type. The DependentNameType may start with a "typename" (for a 3949/// typename-specifier), "class", "struct", "union", or "enum" (for a 3950/// dependent elaborated-type-specifier), or nothing (in contexts where we 3951/// know that we must be referring to a type, e.g., in a base class specifier). 3952class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { 3953 3954 /// \brief The nested name specifier containing the qualifier. 3955 NestedNameSpecifier *NNS; 3956 3957 /// \brief The type that this typename specifier refers to. 3958 const IdentifierInfo *Name; 3959 3960 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3961 const IdentifierInfo *Name, QualType CanonType) 3962 : TypeWithKeyword(Keyword, DependentName, CanonType, /*Dependent=*/true, 3963 /*InstantiationDependent=*/true, 3964 /*VariablyModified=*/false, 3965 NNS->containsUnexpandedParameterPack()), 3966 NNS(NNS), Name(Name) { 3967 assert(NNS->isDependent() && 3968 "DependentNameType requires a dependent nested-name-specifier"); 3969 } 3970 3971 friend class ASTContext; // ASTContext creates these 3972 3973public: 3974 /// \brief Retrieve the qualification on this type. 3975 NestedNameSpecifier *getQualifier() const { return NNS; } 3976 3977 /// \brief Retrieve the type named by the typename specifier as an 3978 /// identifier. 3979 /// 3980 /// This routine will return a non-NULL identifier pointer when the 3981 /// form of the original typename was terminated by an identifier, 3982 /// e.g., "typename T::type". 3983 const IdentifierInfo *getIdentifier() const { 3984 return Name; 3985 } 3986 3987 bool isSugared() const { return false; } 3988 QualType desugar() const { return QualType(this, 0); } 3989 3990 void Profile(llvm::FoldingSetNodeID &ID) { 3991 Profile(ID, getKeyword(), NNS, Name); 3992 } 3993 3994 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3995 NestedNameSpecifier *NNS, const IdentifierInfo *Name) { 3996 ID.AddInteger(Keyword); 3997 ID.AddPointer(NNS); 3998 ID.AddPointer(Name); 3999 } 4000 4001 static bool classof(const Type *T) { 4002 return T->getTypeClass() == DependentName; 4003 } 4004}; 4005 4006/// DependentTemplateSpecializationType - Represents a template 4007/// specialization type whose template cannot be resolved, e.g. 4008/// A<T>::template B<T> 4009class DependentTemplateSpecializationType : 4010 public TypeWithKeyword, public llvm::FoldingSetNode { 4011 4012 /// \brief The nested name specifier containing the qualifier. 4013 NestedNameSpecifier *NNS; 4014 4015 /// \brief The identifier of the template. 4016 const IdentifierInfo *Name; 4017 4018 /// \brief - The number of template arguments named in this class 4019 /// template specialization. 4020 unsigned NumArgs; 4021 4022 const TemplateArgument *getArgBuffer() const { 4023 return reinterpret_cast<const TemplateArgument*>(this+1); 4024 } 4025 TemplateArgument *getArgBuffer() { 4026 return reinterpret_cast<TemplateArgument*>(this+1); 4027 } 4028 4029 DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 4030 NestedNameSpecifier *NNS, 4031 const IdentifierInfo *Name, 4032 unsigned NumArgs, 4033 const TemplateArgument *Args, 4034 QualType Canon); 4035 4036 friend class ASTContext; // ASTContext creates these 4037 4038public: 4039 NestedNameSpecifier *getQualifier() const { return NNS; } 4040 const IdentifierInfo *getIdentifier() const { return Name; } 4041 4042 /// \brief Retrieve the template arguments. 4043 const TemplateArgument *getArgs() const { 4044 return getArgBuffer(); 4045 } 4046 4047 /// \brief Retrieve the number of template arguments. 4048 unsigned getNumArgs() const { return NumArgs; } 4049 4050 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 4051 4052 typedef const TemplateArgument * iterator; 4053 iterator begin() const { return getArgs(); } 4054 iterator end() const; // inline in TemplateBase.h 4055 4056 bool isSugared() const { return false; } 4057 QualType desugar() const { return QualType(this, 0); } 4058 4059 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) { 4060 Profile(ID, Context, getKeyword(), NNS, Name, NumArgs, getArgs()); 4061 } 4062 4063 static void Profile(llvm::FoldingSetNodeID &ID, 4064 const ASTContext &Context, 4065 ElaboratedTypeKeyword Keyword, 4066 NestedNameSpecifier *Qualifier, 4067 const IdentifierInfo *Name, 4068 unsigned NumArgs, 4069 const TemplateArgument *Args); 4070 4071 static bool classof(const Type *T) { 4072 return T->getTypeClass() == DependentTemplateSpecialization; 4073 } 4074}; 4075 4076/// \brief Represents a pack expansion of types. 4077/// 4078/// Pack expansions are part of C++0x variadic templates. A pack 4079/// expansion contains a pattern, which itself contains one or more 4080/// "unexpanded" parameter packs. When instantiated, a pack expansion 4081/// produces a series of types, each instantiated from the pattern of 4082/// the expansion, where the Ith instantiation of the pattern uses the 4083/// Ith arguments bound to each of the unexpanded parameter packs. The 4084/// pack expansion is considered to "expand" these unexpanded 4085/// parameter packs. 4086/// 4087/// \code 4088/// template<typename ...Types> struct tuple; 4089/// 4090/// template<typename ...Types> 4091/// struct tuple_of_references { 4092/// typedef tuple<Types&...> type; 4093/// }; 4094/// \endcode 4095/// 4096/// Here, the pack expansion \c Types&... is represented via a 4097/// PackExpansionType whose pattern is Types&. 4098class PackExpansionType : public Type, public llvm::FoldingSetNode { 4099 /// \brief The pattern of the pack expansion. 4100 QualType Pattern; 4101 4102 /// \brief The number of expansions that this pack expansion will 4103 /// generate when substituted (+1), or indicates that 4104 /// 4105 /// This field will only have a non-zero value when some of the parameter 4106 /// packs that occur within the pattern have been substituted but others have 4107 /// not. 4108 unsigned NumExpansions; 4109 4110 PackExpansionType(QualType Pattern, QualType Canon, 4111 Optional<unsigned> NumExpansions) 4112 : Type(PackExpansion, Canon, /*Dependent=*/Pattern->isDependentType(), 4113 /*InstantiationDependent=*/true, 4114 /*VariableModified=*/Pattern->isVariablyModifiedType(), 4115 /*ContainsUnexpandedParameterPack=*/false), 4116 Pattern(Pattern), 4117 NumExpansions(NumExpansions? *NumExpansions + 1: 0) { } 4118 4119 friend class ASTContext; // ASTContext creates these 4120 4121public: 4122 /// \brief Retrieve the pattern of this pack expansion, which is the 4123 /// type that will be repeatedly instantiated when instantiating the 4124 /// pack expansion itself. 4125 QualType getPattern() const { return Pattern; } 4126 4127 /// \brief Retrieve the number of expansions that this pack expansion will 4128 /// generate, if known. 4129 Optional<unsigned> getNumExpansions() const { 4130 if (NumExpansions) 4131 return NumExpansions - 1; 4132 4133 return None; 4134 } 4135 4136 bool isSugared() const { return false; } 4137 QualType desugar() const { return QualType(this, 0); } 4138 4139 void Profile(llvm::FoldingSetNodeID &ID) { 4140 Profile(ID, getPattern(), getNumExpansions()); 4141 } 4142 4143 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pattern, 4144 Optional<unsigned> NumExpansions) { 4145 ID.AddPointer(Pattern.getAsOpaquePtr()); 4146 ID.AddBoolean(NumExpansions.hasValue()); 4147 if (NumExpansions) 4148 ID.AddInteger(*NumExpansions); 4149 } 4150 4151 static bool classof(const Type *T) { 4152 return T->getTypeClass() == PackExpansion; 4153 } 4154}; 4155 4156/// ObjCObjectType - Represents a class type in Objective C. 4157/// Every Objective C type is a combination of a base type and a 4158/// list of protocols. 4159/// 4160/// Given the following declarations: 4161/// \code 4162/// \@class C; 4163/// \@protocol P; 4164/// \endcode 4165/// 4166/// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType 4167/// with base C and no protocols. 4168/// 4169/// 'C<P>' is an ObjCObjectType with base C and protocol list [P]. 4170/// 4171/// 'id' is a TypedefType which is sugar for an ObjCPointerType whose 4172/// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType 4173/// and no protocols. 4174/// 4175/// 'id<P>' is an ObjCPointerType whose pointee is an ObjCObjecType 4176/// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually 4177/// this should get its own sugar class to better represent the source. 4178class ObjCObjectType : public Type { 4179 // ObjCObjectType.NumProtocols - the number of protocols stored 4180 // after the ObjCObjectPointerType node. 4181 // 4182 // These protocols are those written directly on the type. If 4183 // protocol qualifiers ever become additive, the iterators will need 4184 // to get kindof complicated. 4185 // 4186 // In the canonical object type, these are sorted alphabetically 4187 // and uniqued. 4188 4189 /// Either a BuiltinType or an InterfaceType or sugar for either. 4190 QualType BaseType; 4191 4192 ObjCProtocolDecl * const *getProtocolStorage() const { 4193 return const_cast<ObjCObjectType*>(this)->getProtocolStorage(); 4194 } 4195 4196 ObjCProtocolDecl **getProtocolStorage(); 4197 4198protected: 4199 ObjCObjectType(QualType Canonical, QualType Base, 4200 ObjCProtocolDecl * const *Protocols, unsigned NumProtocols); 4201 4202 enum Nonce_ObjCInterface { Nonce_ObjCInterface }; 4203 ObjCObjectType(enum Nonce_ObjCInterface) 4204 : Type(ObjCInterface, QualType(), false, false, false, false), 4205 BaseType(QualType(this_(), 0)) { 4206 ObjCObjectTypeBits.NumProtocols = 0; 4207 } 4208 4209public: 4210 /// getBaseType - Gets the base type of this object type. This is 4211 /// always (possibly sugar for) one of: 4212 /// - the 'id' builtin type (as opposed to the 'id' type visible to the 4213 /// user, which is a typedef for an ObjCPointerType) 4214 /// - the 'Class' builtin type (same caveat) 4215 /// - an ObjCObjectType (currently always an ObjCInterfaceType) 4216 QualType getBaseType() const { return BaseType; } 4217 4218 bool isObjCId() const { 4219 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); 4220 } 4221 bool isObjCClass() const { 4222 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); 4223 } 4224 bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } 4225 bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } 4226 bool isObjCUnqualifiedIdOrClass() const { 4227 if (!qual_empty()) return false; 4228 if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) 4229 return T->getKind() == BuiltinType::ObjCId || 4230 T->getKind() == BuiltinType::ObjCClass; 4231 return false; 4232 } 4233 bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } 4234 bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } 4235 4236 /// Gets the interface declaration for this object type, if the base type 4237 /// really is an interface. 4238 ObjCInterfaceDecl *getInterface() const; 4239 4240 typedef ObjCProtocolDecl * const *qual_iterator; 4241 4242 qual_iterator qual_begin() const { return getProtocolStorage(); } 4243 qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } 4244 4245 bool qual_empty() const { return getNumProtocols() == 0; } 4246 4247 /// getNumProtocols - Return the number of qualifying protocols in this 4248 /// interface type, or 0 if there are none. 4249 unsigned getNumProtocols() const { return ObjCObjectTypeBits.NumProtocols; } 4250 4251 /// \brief Fetch a protocol by index. 4252 ObjCProtocolDecl *getProtocol(unsigned I) const { 4253 assert(I < getNumProtocols() && "Out-of-range protocol access"); 4254 return qual_begin()[I]; 4255 } 4256 4257 bool isSugared() const { return false; } 4258 QualType desugar() const { return QualType(this, 0); } 4259 4260 static bool classof(const Type *T) { 4261 return T->getTypeClass() == ObjCObject || 4262 T->getTypeClass() == ObjCInterface; 4263 } 4264}; 4265 4266/// ObjCObjectTypeImpl - A class providing a concrete implementation 4267/// of ObjCObjectType, so as to not increase the footprint of 4268/// ObjCInterfaceType. Code outside of ASTContext and the core type 4269/// system should not reference this type. 4270class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { 4271 friend class ASTContext; 4272 4273 // If anyone adds fields here, ObjCObjectType::getProtocolStorage() 4274 // will need to be modified. 4275 4276 ObjCObjectTypeImpl(QualType Canonical, QualType Base, 4277 ObjCProtocolDecl * const *Protocols, 4278 unsigned NumProtocols) 4279 : ObjCObjectType(Canonical, Base, Protocols, NumProtocols) {} 4280 4281public: 4282 void Profile(llvm::FoldingSetNodeID &ID); 4283 static void Profile(llvm::FoldingSetNodeID &ID, 4284 QualType Base, 4285 ObjCProtocolDecl *const *protocols, 4286 unsigned NumProtocols); 4287}; 4288 4289inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorage() { 4290 return reinterpret_cast<ObjCProtocolDecl**>( 4291 static_cast<ObjCObjectTypeImpl*>(this) + 1); 4292} 4293 4294/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 4295/// object oriented design. They basically correspond to C++ classes. There 4296/// are two kinds of interface types, normal interfaces like "NSString" and 4297/// qualified interfaces, which are qualified with a protocol list like 4298/// "NSString<NSCopyable, NSAmazing>". 4299/// 4300/// ObjCInterfaceType guarantees the following properties when considered 4301/// as a subtype of its superclass, ObjCObjectType: 4302/// - There are no protocol qualifiers. To reinforce this, code which 4303/// tries to invoke the protocol methods via an ObjCInterfaceType will 4304/// fail to compile. 4305/// - It is its own base type. That is, if T is an ObjCInterfaceType*, 4306/// T->getBaseType() == QualType(T, 0). 4307class ObjCInterfaceType : public ObjCObjectType { 4308 mutable ObjCInterfaceDecl *Decl; 4309 4310 ObjCInterfaceType(const ObjCInterfaceDecl *D) 4311 : ObjCObjectType(Nonce_ObjCInterface), 4312 Decl(const_cast<ObjCInterfaceDecl*>(D)) {} 4313 friend class ASTContext; // ASTContext creates these. 4314 friend class ASTReader; 4315 friend class ObjCInterfaceDecl; 4316 4317public: 4318 /// getDecl - Get the declaration of this interface. 4319 ObjCInterfaceDecl *getDecl() const { return Decl; } 4320 4321 bool isSugared() const { return false; } 4322 QualType desugar() const { return QualType(this, 0); } 4323 4324 static bool classof(const Type *T) { 4325 return T->getTypeClass() == ObjCInterface; 4326 } 4327 4328 // Nonsense to "hide" certain members of ObjCObjectType within this 4329 // class. People asking for protocols on an ObjCInterfaceType are 4330 // not going to get what they want: ObjCInterfaceTypes are 4331 // guaranteed to have no protocols. 4332 enum { 4333 qual_iterator, 4334 qual_begin, 4335 qual_end, 4336 getNumProtocols, 4337 getProtocol 4338 }; 4339}; 4340 4341inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { 4342 if (const ObjCInterfaceType *T = 4343 getBaseType()->getAs<ObjCInterfaceType>()) 4344 return T->getDecl(); 4345 return 0; 4346} 4347 4348/// ObjCObjectPointerType - Used to represent a pointer to an 4349/// Objective C object. These are constructed from pointer 4350/// declarators when the pointee type is an ObjCObjectType (or sugar 4351/// for one). In addition, the 'id' and 'Class' types are typedefs 4352/// for these, and the protocol-qualified types 'id<P>' and 'Class<P>' 4353/// are translated into these. 4354/// 4355/// Pointers to pointers to Objective C objects are still PointerTypes; 4356/// only the first level of pointer gets it own type implementation. 4357class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 4358 QualType PointeeType; 4359 4360 ObjCObjectPointerType(QualType Canonical, QualType Pointee) 4361 : Type(ObjCObjectPointer, Canonical, false, false, false, false), 4362 PointeeType(Pointee) {} 4363 friend class ASTContext; // ASTContext creates these. 4364 4365public: 4366 /// getPointeeType - Gets the type pointed to by this ObjC pointer. 4367 /// The result will always be an ObjCObjectType or sugar thereof. 4368 QualType getPointeeType() const { return PointeeType; } 4369 4370 /// getObjCObjectType - Gets the type pointed to by this ObjC 4371 /// pointer. This method always returns non-null. 4372 /// 4373 /// This method is equivalent to getPointeeType() except that 4374 /// it discards any typedefs (or other sugar) between this 4375 /// type and the "outermost" object type. So for: 4376 /// \code 4377 /// \@class A; \@protocol P; \@protocol Q; 4378 /// typedef A<P> AP; 4379 /// typedef A A1; 4380 /// typedef A1<P> A1P; 4381 /// typedef A1P<Q> A1PQ; 4382 /// \endcode 4383 /// For 'A*', getObjectType() will return 'A'. 4384 /// For 'A<P>*', getObjectType() will return 'A<P>'. 4385 /// For 'AP*', getObjectType() will return 'A<P>'. 4386 /// For 'A1*', getObjectType() will return 'A'. 4387 /// For 'A1<P>*', getObjectType() will return 'A1<P>'. 4388 /// For 'A1P*', getObjectType() will return 'A1<P>'. 4389 /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because 4390 /// adding protocols to a protocol-qualified base discards the 4391 /// old qualifiers (for now). But if it didn't, getObjectType() 4392 /// would return 'A1P<Q>' (and we'd have to make iterating over 4393 /// qualifiers more complicated). 4394 const ObjCObjectType *getObjectType() const { 4395 return PointeeType->castAs<ObjCObjectType>(); 4396 } 4397 4398 /// getInterfaceType - If this pointer points to an Objective C 4399 /// \@interface type, gets the type for that interface. Any protocol 4400 /// qualifiers on the interface are ignored. 4401 /// 4402 /// \return null if the base type for this pointer is 'id' or 'Class' 4403 const ObjCInterfaceType *getInterfaceType() const { 4404 return getObjectType()->getBaseType()->getAs<ObjCInterfaceType>(); 4405 } 4406 4407 /// getInterfaceDecl - If this pointer points to an Objective \@interface 4408 /// type, gets the declaration for that interface. 4409 /// 4410 /// \return null if the base type for this pointer is 'id' or 'Class' 4411 ObjCInterfaceDecl *getInterfaceDecl() const { 4412 return getObjectType()->getInterface(); 4413 } 4414 4415 /// isObjCIdType - True if this is equivalent to the 'id' type, i.e. if 4416 /// its object type is the primitive 'id' type with no protocols. 4417 bool isObjCIdType() const { 4418 return getObjectType()->isObjCUnqualifiedId(); 4419 } 4420 4421 /// isObjCClassType - True if this is equivalent to the 'Class' type, 4422 /// i.e. if its object tive is the primitive 'Class' type with no protocols. 4423 bool isObjCClassType() const { 4424 return getObjectType()->isObjCUnqualifiedClass(); 4425 } 4426 4427 /// isObjCQualifiedIdType - True if this is equivalent to 'id<P>' for some 4428 /// non-empty set of protocols. 4429 bool isObjCQualifiedIdType() const { 4430 return getObjectType()->isObjCQualifiedId(); 4431 } 4432 4433 /// isObjCQualifiedClassType - True if this is equivalent to 'Class<P>' for 4434 /// some non-empty set of protocols. 4435 bool isObjCQualifiedClassType() const { 4436 return getObjectType()->isObjCQualifiedClass(); 4437 } 4438 4439 /// An iterator over the qualifiers on the object type. Provided 4440 /// for convenience. This will always iterate over the full set of 4441 /// protocols on a type, not just those provided directly. 4442 typedef ObjCObjectType::qual_iterator qual_iterator; 4443 4444 qual_iterator qual_begin() const { 4445 return getObjectType()->qual_begin(); 4446 } 4447 qual_iterator qual_end() const { 4448 return getObjectType()->qual_end(); 4449 } 4450 bool qual_empty() const { return getObjectType()->qual_empty(); } 4451 4452 /// getNumProtocols - Return the number of qualifying protocols on 4453 /// the object type. 4454 unsigned getNumProtocols() const { 4455 return getObjectType()->getNumProtocols(); 4456 } 4457 4458 /// \brief Retrieve a qualifying protocol by index on the object 4459 /// type. 4460 ObjCProtocolDecl *getProtocol(unsigned I) const { 4461 return getObjectType()->getProtocol(I); 4462 } 4463 4464 bool isSugared() const { return false; } 4465 QualType desugar() const { return QualType(this, 0); } 4466 4467 void Profile(llvm::FoldingSetNodeID &ID) { 4468 Profile(ID, getPointeeType()); 4469 } 4470 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 4471 ID.AddPointer(T.getAsOpaquePtr()); 4472 } 4473 static bool classof(const Type *T) { 4474 return T->getTypeClass() == ObjCObjectPointer; 4475 } 4476}; 4477 4478class AtomicType : public Type, public llvm::FoldingSetNode { 4479 QualType ValueType; 4480 4481 AtomicType(QualType ValTy, QualType Canonical) 4482 : Type(Atomic, Canonical, ValTy->isDependentType(), 4483 ValTy->isInstantiationDependentType(), 4484 ValTy->isVariablyModifiedType(), 4485 ValTy->containsUnexpandedParameterPack()), 4486 ValueType(ValTy) {} 4487 friend class ASTContext; // ASTContext creates these. 4488 4489 public: 4490 /// getValueType - Gets the type contained by this atomic type, i.e. 4491 /// the type returned by performing an atomic load of this atomic type. 4492 QualType getValueType() const { return ValueType; } 4493 4494 bool isSugared() const { return false; } 4495 QualType desugar() const { return QualType(this, 0); } 4496 4497 void Profile(llvm::FoldingSetNodeID &ID) { 4498 Profile(ID, getValueType()); 4499 } 4500 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 4501 ID.AddPointer(T.getAsOpaquePtr()); 4502 } 4503 static bool classof(const Type *T) { 4504 return T->getTypeClass() == Atomic; 4505 } 4506}; 4507 4508/// A qualifier set is used to build a set of qualifiers. 4509class QualifierCollector : public Qualifiers { 4510public: 4511 QualifierCollector(Qualifiers Qs = Qualifiers()) : Qualifiers(Qs) {} 4512 4513 /// Collect any qualifiers on the given type and return an 4514 /// unqualified type. The qualifiers are assumed to be consistent 4515 /// with those already in the type. 4516 const Type *strip(QualType type) { 4517 addFastQualifiers(type.getLocalFastQualifiers()); 4518 if (!type.hasLocalNonFastQualifiers()) 4519 return type.getTypePtrUnsafe(); 4520 4521 const ExtQuals *extQuals = type.getExtQualsUnsafe(); 4522 addConsistentQualifiers(extQuals->getQualifiers()); 4523 return extQuals->getBaseType(); 4524 } 4525 4526 /// Apply the collected qualifiers to the given type. 4527 QualType apply(const ASTContext &Context, QualType QT) const; 4528 4529 /// Apply the collected qualifiers to the given type. 4530 QualType apply(const ASTContext &Context, const Type* T) const; 4531}; 4532 4533 4534// Inline function definitions. 4535 4536inline SplitQualType SplitQualType::getSingleStepDesugaredType() const { 4537 SplitQualType desugar = 4538 Ty->getLocallyUnqualifiedSingleStepDesugaredType().split(); 4539 desugar.Quals.addConsistentQualifiers(Quals); 4540 return desugar; 4541} 4542 4543inline const Type *QualType::getTypePtr() const { 4544 return getCommonPtr()->BaseType; 4545} 4546 4547inline const Type *QualType::getTypePtrOrNull() const { 4548 return (isNull() ? 0 : getCommonPtr()->BaseType); 4549} 4550 4551inline SplitQualType QualType::split() const { 4552 if (!hasLocalNonFastQualifiers()) 4553 return SplitQualType(getTypePtrUnsafe(), 4554 Qualifiers::fromFastMask(getLocalFastQualifiers())); 4555 4556 const ExtQuals *eq = getExtQualsUnsafe(); 4557 Qualifiers qs = eq->getQualifiers(); 4558 qs.addFastQualifiers(getLocalFastQualifiers()); 4559 return SplitQualType(eq->getBaseType(), qs); 4560} 4561 4562inline Qualifiers QualType::getLocalQualifiers() const { 4563 Qualifiers Quals; 4564 if (hasLocalNonFastQualifiers()) 4565 Quals = getExtQualsUnsafe()->getQualifiers(); 4566 Quals.addFastQualifiers(getLocalFastQualifiers()); 4567 return Quals; 4568} 4569 4570inline Qualifiers QualType::getQualifiers() const { 4571 Qualifiers quals = getCommonPtr()->CanonicalType.getLocalQualifiers(); 4572 quals.addFastQualifiers(getLocalFastQualifiers()); 4573 return quals; 4574} 4575 4576inline unsigned QualType::getCVRQualifiers() const { 4577 unsigned cvr = getCommonPtr()->CanonicalType.getLocalCVRQualifiers(); 4578 cvr |= getLocalCVRQualifiers(); 4579 return cvr; 4580} 4581 4582inline QualType QualType::getCanonicalType() const { 4583 QualType canon = getCommonPtr()->CanonicalType; 4584 return canon.withFastQualifiers(getLocalFastQualifiers()); 4585} 4586 4587inline bool QualType::isCanonical() const { 4588 return getTypePtr()->isCanonicalUnqualified(); 4589} 4590 4591inline bool QualType::isCanonicalAsParam() const { 4592 if (!isCanonical()) return false; 4593 if (hasLocalQualifiers()) return false; 4594 4595 const Type *T = getTypePtr(); 4596 if (T->isVariablyModifiedType() && T->hasSizedVLAType()) 4597 return false; 4598 4599 return !isa<FunctionType>(T) && !isa<ArrayType>(T); 4600} 4601 4602inline bool QualType::isConstQualified() const { 4603 return isLocalConstQualified() || 4604 getCommonPtr()->CanonicalType.isLocalConstQualified(); 4605} 4606 4607inline bool QualType::isRestrictQualified() const { 4608 return isLocalRestrictQualified() || 4609 getCommonPtr()->CanonicalType.isLocalRestrictQualified(); 4610} 4611 4612 4613inline bool QualType::isVolatileQualified() const { 4614 return isLocalVolatileQualified() || 4615 getCommonPtr()->CanonicalType.isLocalVolatileQualified(); 4616} 4617 4618inline bool QualType::hasQualifiers() const { 4619 return hasLocalQualifiers() || 4620 getCommonPtr()->CanonicalType.hasLocalQualifiers(); 4621} 4622 4623inline QualType QualType::getUnqualifiedType() const { 4624 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4625 return QualType(getTypePtr(), 0); 4626 4627 return QualType(getSplitUnqualifiedTypeImpl(*this).Ty, 0); 4628} 4629 4630inline SplitQualType QualType::getSplitUnqualifiedType() const { 4631 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4632 return split(); 4633 4634 return getSplitUnqualifiedTypeImpl(*this); 4635} 4636 4637inline void QualType::removeLocalConst() { 4638 removeLocalFastQualifiers(Qualifiers::Const); 4639} 4640 4641inline void QualType::removeLocalRestrict() { 4642 removeLocalFastQualifiers(Qualifiers::Restrict); 4643} 4644 4645inline void QualType::removeLocalVolatile() { 4646 removeLocalFastQualifiers(Qualifiers::Volatile); 4647} 4648 4649inline void QualType::removeLocalCVRQualifiers(unsigned Mask) { 4650 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 4651 assert((int)Qualifiers::CVRMask == (int)Qualifiers::FastMask); 4652 4653 // Fast path: we don't need to touch the slow qualifiers. 4654 removeLocalFastQualifiers(Mask); 4655} 4656 4657/// getAddressSpace - Return the address space of this type. 4658inline unsigned QualType::getAddressSpace() const { 4659 return getQualifiers().getAddressSpace(); 4660} 4661 4662/// getObjCGCAttr - Return the gc attribute of this type. 4663inline Qualifiers::GC QualType::getObjCGCAttr() const { 4664 return getQualifiers().getObjCGCAttr(); 4665} 4666 4667inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { 4668 if (const PointerType *PT = t.getAs<PointerType>()) { 4669 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 4670 return FT->getExtInfo(); 4671 } else if (const FunctionType *FT = t.getAs<FunctionType>()) 4672 return FT->getExtInfo(); 4673 4674 return FunctionType::ExtInfo(); 4675} 4676 4677inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { 4678 return getFunctionExtInfo(*t); 4679} 4680 4681/// isMoreQualifiedThan - Determine whether this type is more 4682/// qualified than the Other type. For example, "const volatile int" 4683/// is more qualified than "const int", "volatile int", and 4684/// "int". However, it is not more qualified than "const volatile 4685/// int". 4686inline bool QualType::isMoreQualifiedThan(QualType other) const { 4687 Qualifiers myQuals = getQualifiers(); 4688 Qualifiers otherQuals = other.getQualifiers(); 4689 return (myQuals != otherQuals && myQuals.compatiblyIncludes(otherQuals)); 4690} 4691 4692/// isAtLeastAsQualifiedAs - Determine whether this type is at last 4693/// as qualified as the Other type. For example, "const volatile 4694/// int" is at least as qualified as "const int", "volatile int", 4695/// "int", and "const volatile int". 4696inline bool QualType::isAtLeastAsQualifiedAs(QualType other) const { 4697 return getQualifiers().compatiblyIncludes(other.getQualifiers()); 4698} 4699 4700/// getNonReferenceType - If Type is a reference type (e.g., const 4701/// int&), returns the type that the reference refers to ("const 4702/// int"). Otherwise, returns the type itself. This routine is used 4703/// throughout Sema to implement C++ 5p6: 4704/// 4705/// If an expression initially has the type "reference to T" (8.3.2, 4706/// 8.5.3), the type is adjusted to "T" prior to any further 4707/// analysis, the expression designates the object or function 4708/// denoted by the reference, and the expression is an lvalue. 4709inline QualType QualType::getNonReferenceType() const { 4710 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 4711 return RefType->getPointeeType(); 4712 else 4713 return *this; 4714} 4715 4716inline bool QualType::isCForbiddenLValueType() const { 4717 return ((getTypePtr()->isVoidType() && !hasQualifiers()) || 4718 getTypePtr()->isFunctionType()); 4719} 4720 4721/// \brief Tests whether the type is categorized as a fundamental type. 4722/// 4723/// \returns True for types specified in C++0x [basic.fundamental]. 4724inline bool Type::isFundamentalType() const { 4725 return isVoidType() || 4726 // FIXME: It's really annoying that we don't have an 4727 // 'isArithmeticType()' which agrees with the standard definition. 4728 (isArithmeticType() && !isEnumeralType()); 4729} 4730 4731/// \brief Tests whether the type is categorized as a compound type. 4732/// 4733/// \returns True for types specified in C++0x [basic.compound]. 4734inline bool Type::isCompoundType() const { 4735 // C++0x [basic.compound]p1: 4736 // Compound types can be constructed in the following ways: 4737 // -- arrays of objects of a given type [...]; 4738 return isArrayType() || 4739 // -- functions, which have parameters of given types [...]; 4740 isFunctionType() || 4741 // -- pointers to void or objects or functions [...]; 4742 isPointerType() || 4743 // -- references to objects or functions of a given type. [...] 4744 isReferenceType() || 4745 // -- classes containing a sequence of objects of various types, [...]; 4746 isRecordType() || 4747 // -- unions, which are classes capable of containing objects of different 4748 // types at different times; 4749 isUnionType() || 4750 // -- enumerations, which comprise a set of named constant values. [...]; 4751 isEnumeralType() || 4752 // -- pointers to non-static class members, [...]. 4753 isMemberPointerType(); 4754} 4755 4756inline bool Type::isFunctionType() const { 4757 return isa<FunctionType>(CanonicalType); 4758} 4759inline bool Type::isPointerType() const { 4760 return isa<PointerType>(CanonicalType); 4761} 4762inline bool Type::isAnyPointerType() const { 4763 return isPointerType() || isObjCObjectPointerType(); 4764} 4765inline bool Type::isBlockPointerType() const { 4766 return isa<BlockPointerType>(CanonicalType); 4767} 4768inline bool Type::isReferenceType() const { 4769 return isa<ReferenceType>(CanonicalType); 4770} 4771inline bool Type::isLValueReferenceType() const { 4772 return isa<LValueReferenceType>(CanonicalType); 4773} 4774inline bool Type::isRValueReferenceType() const { 4775 return isa<RValueReferenceType>(CanonicalType); 4776} 4777inline bool Type::isFunctionPointerType() const { 4778 if (const PointerType *T = getAs<PointerType>()) 4779 return T->getPointeeType()->isFunctionType(); 4780 else 4781 return false; 4782} 4783inline bool Type::isMemberPointerType() const { 4784 return isa<MemberPointerType>(CanonicalType); 4785} 4786inline bool Type::isMemberFunctionPointerType() const { 4787 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4788 return T->isMemberFunctionPointer(); 4789 else 4790 return false; 4791} 4792inline bool Type::isMemberDataPointerType() const { 4793 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4794 return T->isMemberDataPointer(); 4795 else 4796 return false; 4797} 4798inline bool Type::isArrayType() const { 4799 return isa<ArrayType>(CanonicalType); 4800} 4801inline bool Type::isConstantArrayType() const { 4802 return isa<ConstantArrayType>(CanonicalType); 4803} 4804inline bool Type::isIncompleteArrayType() const { 4805 return isa<IncompleteArrayType>(CanonicalType); 4806} 4807inline bool Type::isVariableArrayType() const { 4808 return isa<VariableArrayType>(CanonicalType); 4809} 4810inline bool Type::isDependentSizedArrayType() const { 4811 return isa<DependentSizedArrayType>(CanonicalType); 4812} 4813inline bool Type::isBuiltinType() const { 4814 return isa<BuiltinType>(CanonicalType); 4815} 4816inline bool Type::isRecordType() const { 4817 return isa<RecordType>(CanonicalType); 4818} 4819inline bool Type::isEnumeralType() const { 4820 return isa<EnumType>(CanonicalType); 4821} 4822inline bool Type::isAnyComplexType() const { 4823 return isa<ComplexType>(CanonicalType); 4824} 4825inline bool Type::isVectorType() const { 4826 return isa<VectorType>(CanonicalType); 4827} 4828inline bool Type::isExtVectorType() const { 4829 return isa<ExtVectorType>(CanonicalType); 4830} 4831inline bool Type::isObjCObjectPointerType() const { 4832 return isa<ObjCObjectPointerType>(CanonicalType); 4833} 4834inline bool Type::isObjCObjectType() const { 4835 return isa<ObjCObjectType>(CanonicalType); 4836} 4837inline bool Type::isObjCObjectOrInterfaceType() const { 4838 return isa<ObjCInterfaceType>(CanonicalType) || 4839 isa<ObjCObjectType>(CanonicalType); 4840} 4841inline bool Type::isAtomicType() const { 4842 return isa<AtomicType>(CanonicalType); 4843} 4844 4845inline bool Type::isObjCQualifiedIdType() const { 4846 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4847 return OPT->isObjCQualifiedIdType(); 4848 return false; 4849} 4850inline bool Type::isObjCQualifiedClassType() const { 4851 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4852 return OPT->isObjCQualifiedClassType(); 4853 return false; 4854} 4855inline bool Type::isObjCIdType() const { 4856 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4857 return OPT->isObjCIdType(); 4858 return false; 4859} 4860inline bool Type::isObjCClassType() const { 4861 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4862 return OPT->isObjCClassType(); 4863 return false; 4864} 4865inline bool Type::isObjCSelType() const { 4866 if (const PointerType *OPT = getAs<PointerType>()) 4867 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 4868 return false; 4869} 4870inline bool Type::isObjCBuiltinType() const { 4871 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 4872} 4873 4874inline bool Type::isImage1dT() const { 4875 return isSpecificBuiltinType(BuiltinType::OCLImage1d); 4876} 4877 4878inline bool Type::isImage1dArrayT() const { 4879 return isSpecificBuiltinType(BuiltinType::OCLImage1dArray); 4880} 4881 4882inline bool Type::isImage1dBufferT() const { 4883 return isSpecificBuiltinType(BuiltinType::OCLImage1dBuffer); 4884} 4885 4886inline bool Type::isImage2dT() const { 4887 return isSpecificBuiltinType(BuiltinType::OCLImage2d); 4888} 4889 4890inline bool Type::isImage2dArrayT() const { 4891 return isSpecificBuiltinType(BuiltinType::OCLImage2dArray); 4892} 4893 4894inline bool Type::isImage3dT() const { 4895 return isSpecificBuiltinType(BuiltinType::OCLImage3d); 4896} 4897 4898inline bool Type::isSamplerT() const { 4899 return isSpecificBuiltinType(BuiltinType::OCLSampler); 4900} 4901 4902inline bool Type::isEventT() const { 4903 return isSpecificBuiltinType(BuiltinType::OCLEvent); 4904} 4905 4906inline bool Type::isImageType() const { 4907 return isImage3dT() || 4908 isImage2dT() || isImage2dArrayT() || 4909 isImage1dT() || isImage1dArrayT() || isImage1dBufferT(); 4910} 4911 4912inline bool Type::isOpenCLSpecificType() const { 4913 return isSamplerT() || isEventT() || isImageType(); 4914} 4915 4916inline bool Type::isTemplateTypeParmType() const { 4917 return isa<TemplateTypeParmType>(CanonicalType); 4918} 4919 4920inline bool Type::isSpecificBuiltinType(unsigned K) const { 4921 if (const BuiltinType *BT = getAs<BuiltinType>()) 4922 if (BT->getKind() == (BuiltinType::Kind) K) 4923 return true; 4924 return false; 4925} 4926 4927inline bool Type::isPlaceholderType() const { 4928 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4929 return BT->isPlaceholderType(); 4930 return false; 4931} 4932 4933inline const BuiltinType *Type::getAsPlaceholderType() const { 4934 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4935 if (BT->isPlaceholderType()) 4936 return BT; 4937 return 0; 4938} 4939 4940inline bool Type::isSpecificPlaceholderType(unsigned K) const { 4941 assert(BuiltinType::isPlaceholderTypeKind((BuiltinType::Kind) K)); 4942 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4943 return (BT->getKind() == (BuiltinType::Kind) K); 4944 return false; 4945} 4946 4947inline bool Type::isNonOverloadPlaceholderType() const { 4948 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4949 return BT->isNonOverloadPlaceholderType(); 4950 return false; 4951} 4952 4953inline bool Type::isVoidType() const { 4954 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 4955 return BT->getKind() == BuiltinType::Void; 4956 return false; 4957} 4958 4959inline bool Type::isHalfType() const { 4960 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 4961 return BT->getKind() == BuiltinType::Half; 4962 // FIXME: Should we allow complex __fp16? Probably not. 4963 return false; 4964} 4965 4966inline bool Type::isNullPtrType() const { 4967 if (const BuiltinType *BT = getAs<BuiltinType>()) 4968 return BT->getKind() == BuiltinType::NullPtr; 4969 return false; 4970} 4971 4972extern bool IsEnumDeclComplete(EnumDecl *); 4973extern bool IsEnumDeclScoped(EnumDecl *); 4974 4975inline bool Type::isIntegerType() const { 4976 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 4977 return BT->getKind() >= BuiltinType::Bool && 4978 BT->getKind() <= BuiltinType::Int128; 4979 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) { 4980 // Incomplete enum types are not treated as integer types. 4981 // FIXME: In C++, enum types are never integer types. 4982 return IsEnumDeclComplete(ET->getDecl()) && 4983 !IsEnumDeclScoped(ET->getDecl()); 4984 } 4985 return false; 4986} 4987 4988inline bool Type::isScalarType() const { 4989 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 4990 return BT->getKind() > BuiltinType::Void && 4991 BT->getKind() <= BuiltinType::NullPtr; 4992 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) 4993 // Enums are scalar types, but only if they are defined. Incomplete enums 4994 // are not treated as scalar types. 4995 return IsEnumDeclComplete(ET->getDecl()); 4996 return isa<PointerType>(CanonicalType) || 4997 isa<BlockPointerType>(CanonicalType) || 4998 isa<MemberPointerType>(CanonicalType) || 4999 isa<ComplexType>(CanonicalType) || 5000 isa<ObjCObjectPointerType>(CanonicalType); 5001} 5002 5003inline bool Type::isIntegralOrEnumerationType() const { 5004 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 5005 return BT->getKind() >= BuiltinType::Bool && 5006 BT->getKind() <= BuiltinType::Int128; 5007 5008 // Check for a complete enum type; incomplete enum types are not properly an 5009 // enumeration type in the sense required here. 5010 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) 5011 return IsEnumDeclComplete(ET->getDecl()); 5012 5013 return false; 5014} 5015 5016inline bool Type::isBooleanType() const { 5017 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 5018 return BT->getKind() == BuiltinType::Bool; 5019 return false; 5020} 5021 5022/// \brief Determines whether this is a type for which one can define 5023/// an overloaded operator. 5024inline bool Type::isOverloadableType() const { 5025 return isDependentType() || isRecordType() || isEnumeralType(); 5026} 5027 5028/// \brief Determines whether this type can decay to a pointer type. 5029inline bool Type::canDecayToPointerType() const { 5030 return isFunctionType() || isArrayType(); 5031} 5032 5033inline bool Type::hasPointerRepresentation() const { 5034 return (isPointerType() || isReferenceType() || isBlockPointerType() || 5035 isObjCObjectPointerType() || isNullPtrType()); 5036} 5037 5038inline bool Type::hasObjCPointerRepresentation() const { 5039 return isObjCObjectPointerType(); 5040} 5041 5042inline const Type *Type::getBaseElementTypeUnsafe() const { 5043 const Type *type = this; 5044 while (const ArrayType *arrayType = type->getAsArrayTypeUnsafe()) 5045 type = arrayType->getElementType().getTypePtr(); 5046 return type; 5047} 5048 5049/// Insertion operator for diagnostics. This allows sending QualType's into a 5050/// diagnostic with <<. 5051inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 5052 QualType T) { 5053 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 5054 DiagnosticsEngine::ak_qualtype); 5055 return DB; 5056} 5057 5058/// Insertion operator for partial diagnostics. This allows sending QualType's 5059/// into a diagnostic with <<. 5060inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, 5061 QualType T) { 5062 PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 5063 DiagnosticsEngine::ak_qualtype); 5064 return PD; 5065} 5066 5067// Helper class template that is used by Type::getAs to ensure that one does 5068// not try to look through a qualified type to get to an array type. 5069template<typename T, 5070 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 5071 llvm::is_base_of<ArrayType, T>::value)> 5072struct ArrayType_cannot_be_used_with_getAs { }; 5073 5074template<typename T> 5075struct ArrayType_cannot_be_used_with_getAs<T, true>; 5076 5077// Member-template getAs<specific type>'. 5078template <typename T> const T *Type::getAs() const { 5079 ArrayType_cannot_be_used_with_getAs<T> at; 5080 (void)at; 5081 5082 // If this is directly a T type, return it. 5083 if (const T *Ty = dyn_cast<T>(this)) 5084 return Ty; 5085 5086 // If the canonical form of this type isn't the right kind, reject it. 5087 if (!isa<T>(CanonicalType)) 5088 return 0; 5089 5090 // If this is a typedef for the type, strip the typedef off without 5091 // losing all typedef information. 5092 return cast<T>(getUnqualifiedDesugaredType()); 5093} 5094 5095inline const ArrayType *Type::getAsArrayTypeUnsafe() const { 5096 // If this is directly an array type, return it. 5097 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) 5098 return arr; 5099 5100 // If the canonical form of this type isn't the right kind, reject it. 5101 if (!isa<ArrayType>(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<ArrayType>(getUnqualifiedDesugaredType()); 5107} 5108 5109template <typename T> const T *Type::castAs() const { 5110 ArrayType_cannot_be_used_with_getAs<T> at; 5111 (void) at; 5112 5113 assert(isa<T>(CanonicalType)); 5114 if (const T *ty = dyn_cast<T>(this)) return ty; 5115 return cast<T>(getUnqualifiedDesugaredType()); 5116} 5117 5118inline const ArrayType *Type::castAsArrayTypeUnsafe() const { 5119 assert(isa<ArrayType>(CanonicalType)); 5120 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) return arr; 5121 return cast<ArrayType>(getUnqualifiedDesugaredType()); 5122} 5123 5124} // end namespace clang 5125 5126#endif 5127