Type.h revision 838dc597e25614c653a062a124b06a04d6b7f5eb
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 an array 788 /// type. To strip qualifiers even from within an 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 an array 799 /// type. To strip qualifiers even from within an array type, use 800 /// ASTContext::getUnqualifiedArrayType. 801 inline SplitQualType getSplitUnqualifiedType() const; 802 803 /// \brief Determine whether this type is more qualified than the other 804 /// given type, requiring exact equality for non-CVR qualifiers. 805 bool isMoreQualifiedThan(QualType Other) const; 806 807 /// \brief Determine whether this type is at least as qualified as the other 808 /// given type, requiring exact equality for non-CVR qualifiers. 809 bool isAtLeastAsQualifiedAs(QualType Other) const; 810 811 QualType getNonReferenceType() const; 812 813 /// \brief Determine the type of a (typically non-lvalue) expression with the 814 /// specified result type. 815 /// 816 /// This routine should be used for expressions for which the return type is 817 /// explicitly specified (e.g., in a cast or call) and isn't necessarily 818 /// an lvalue. It removes a top-level reference (since there are no 819 /// expressions of reference type) and deletes top-level cvr-qualifiers 820 /// from non-class types (in C++) or all types (in C). 821 QualType getNonLValueExprType(ASTContext &Context) const; 822 823 /// getDesugaredType - Return the specified type with any "sugar" removed from 824 /// the type. This takes off typedefs, typeof's etc. If the outer level of 825 /// the type is already concrete, it returns it unmodified. This is similar 826 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 827 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 828 /// concrete. 829 /// 830 /// Qualifiers are left in place. 831 QualType getDesugaredType(const ASTContext &Context) const { 832 return getDesugaredType(*this, Context); 833 } 834 835 SplitQualType getSplitDesugaredType() const { 836 return getSplitDesugaredType(*this); 837 } 838 839 /// \brief Return the specified type with one level of "sugar" removed from 840 /// the type. 841 /// 842 /// This routine takes off the first typedef, typeof, etc. If the outer level 843 /// of the type is already concrete, it returns it unmodified. 844 QualType getSingleStepDesugaredType(const ASTContext &Context) const { 845 return getSingleStepDesugaredTypeImpl(*this, Context); 846 } 847 848 /// IgnoreParens - Returns the specified type after dropping any 849 /// outer-level parentheses. 850 QualType IgnoreParens() const { 851 if (isa<ParenType>(*this)) 852 return QualType::IgnoreParens(*this); 853 return *this; 854 } 855 856 /// operator==/!= - Indicate whether the specified types and qualifiers are 857 /// identical. 858 friend bool operator==(const QualType &LHS, const QualType &RHS) { 859 return LHS.Value == RHS.Value; 860 } 861 friend bool operator!=(const QualType &LHS, const QualType &RHS) { 862 return LHS.Value != RHS.Value; 863 } 864 std::string getAsString() const { 865 return getAsString(split()); 866 } 867 static std::string getAsString(SplitQualType split) { 868 return getAsString(split.Ty, split.Quals); 869 } 870 static std::string getAsString(const Type *ty, Qualifiers qs); 871 872 std::string getAsString(const PrintingPolicy &Policy) const; 873 874 void print(raw_ostream &OS, const PrintingPolicy &Policy, 875 const Twine &PlaceHolder = Twine()) const { 876 print(split(), OS, Policy, PlaceHolder); 877 } 878 static void print(SplitQualType split, raw_ostream &OS, 879 const PrintingPolicy &policy, const Twine &PlaceHolder) { 880 return print(split.Ty, split.Quals, OS, policy, PlaceHolder); 881 } 882 static void print(const Type *ty, Qualifiers qs, 883 raw_ostream &OS, const PrintingPolicy &policy, 884 const Twine &PlaceHolder); 885 886 void getAsStringInternal(std::string &Str, 887 const PrintingPolicy &Policy) const { 888 return getAsStringInternal(split(), Str, Policy); 889 } 890 static void getAsStringInternal(SplitQualType split, std::string &out, 891 const PrintingPolicy &policy) { 892 return getAsStringInternal(split.Ty, split.Quals, out, policy); 893 } 894 static void getAsStringInternal(const Type *ty, Qualifiers qs, 895 std::string &out, 896 const PrintingPolicy &policy); 897 898 class StreamedQualTypeHelper { 899 const QualType &T; 900 const PrintingPolicy &Policy; 901 const Twine &PlaceHolder; 902 public: 903 StreamedQualTypeHelper(const QualType &T, const PrintingPolicy &Policy, 904 const Twine &PlaceHolder) 905 : T(T), Policy(Policy), PlaceHolder(PlaceHolder) { } 906 907 friend raw_ostream &operator<<(raw_ostream &OS, 908 const StreamedQualTypeHelper &SQT) { 909 SQT.T.print(OS, SQT.Policy, SQT.PlaceHolder); 910 return OS; 911 } 912 }; 913 914 StreamedQualTypeHelper stream(const PrintingPolicy &Policy, 915 const Twine &PlaceHolder = Twine()) const { 916 return StreamedQualTypeHelper(*this, Policy, PlaceHolder); 917 } 918 919 void dump(const char *s) const; 920 void dump() const; 921 922 void Profile(llvm::FoldingSetNodeID &ID) const { 923 ID.AddPointer(getAsOpaquePtr()); 924 } 925 926 /// getAddressSpace - Return the address space of this type. 927 inline unsigned getAddressSpace() const; 928 929 /// getObjCGCAttr - Returns gc attribute of this type. 930 inline Qualifiers::GC getObjCGCAttr() const; 931 932 /// isObjCGCWeak true when Type is objc's weak. 933 bool isObjCGCWeak() const { 934 return getObjCGCAttr() == Qualifiers::Weak; 935 } 936 937 /// isObjCGCStrong true when Type is objc's strong. 938 bool isObjCGCStrong() const { 939 return getObjCGCAttr() == Qualifiers::Strong; 940 } 941 942 /// getObjCLifetime - Returns lifetime attribute of this type. 943 Qualifiers::ObjCLifetime getObjCLifetime() const { 944 return getQualifiers().getObjCLifetime(); 945 } 946 947 bool hasNonTrivialObjCLifetime() const { 948 return getQualifiers().hasNonTrivialObjCLifetime(); 949 } 950 951 bool hasStrongOrWeakObjCLifetime() const { 952 return getQualifiers().hasStrongOrWeakObjCLifetime(); 953 } 954 955 enum DestructionKind { 956 DK_none, 957 DK_cxx_destructor, 958 DK_objc_strong_lifetime, 959 DK_objc_weak_lifetime 960 }; 961 962 /// isDestructedType - nonzero if objects of this type require 963 /// non-trivial work to clean up after. Non-zero because it's 964 /// conceivable that qualifiers (objc_gc(weak)?) could make 965 /// something require destruction. 966 DestructionKind isDestructedType() const { 967 return isDestructedTypeImpl(*this); 968 } 969 970 /// \brief Determine whether expressions of the given type are forbidden 971 /// from being lvalues in C. 972 /// 973 /// The expression types that are forbidden to be lvalues are: 974 /// - 'void', but not qualified void 975 /// - function types 976 /// 977 /// The exact rule here is C99 6.3.2.1: 978 /// An lvalue is an expression with an object type or an incomplete 979 /// type other than void. 980 bool isCForbiddenLValueType() const; 981 982private: 983 // These methods are implemented in a separate translation unit; 984 // "static"-ize them to avoid creating temporary QualTypes in the 985 // caller. 986 static bool isConstant(QualType T, ASTContext& Ctx); 987 static QualType getDesugaredType(QualType T, const ASTContext &Context); 988 static SplitQualType getSplitDesugaredType(QualType T); 989 static SplitQualType getSplitUnqualifiedTypeImpl(QualType type); 990 static QualType getSingleStepDesugaredTypeImpl(QualType type, 991 const ASTContext &C); 992 static QualType IgnoreParens(QualType T); 993 static DestructionKind isDestructedTypeImpl(QualType type); 994}; 995 996} // end clang. 997 998namespace llvm { 999/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 1000/// to a specific Type class. 1001template<> struct simplify_type<const ::clang::QualType> { 1002 typedef const ::clang::Type *SimpleType; 1003 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 1004 return Val.getTypePtr(); 1005 } 1006}; 1007template<> struct simplify_type< ::clang::QualType> 1008 : public simplify_type<const ::clang::QualType> {}; 1009 1010// Teach SmallPtrSet that QualType is "basically a pointer". 1011template<> 1012class PointerLikeTypeTraits<clang::QualType> { 1013public: 1014 static inline void *getAsVoidPointer(clang::QualType P) { 1015 return P.getAsOpaquePtr(); 1016 } 1017 static inline clang::QualType getFromVoidPointer(void *P) { 1018 return clang::QualType::getFromOpaquePtr(P); 1019 } 1020 // Various qualifiers go in low bits. 1021 enum { NumLowBitsAvailable = 0 }; 1022}; 1023 1024} // end namespace llvm 1025 1026namespace clang { 1027 1028/// \brief Base class that is common to both the \c ExtQuals and \c Type 1029/// classes, which allows \c QualType to access the common fields between the 1030/// two. 1031/// 1032class ExtQualsTypeCommonBase { 1033 ExtQualsTypeCommonBase(const Type *baseType, QualType canon) 1034 : BaseType(baseType), CanonicalType(canon) {} 1035 1036 /// \brief The "base" type of an extended qualifiers type (\c ExtQuals) or 1037 /// a self-referential pointer (for \c Type). 1038 /// 1039 /// This pointer allows an efficient mapping from a QualType to its 1040 /// underlying type pointer. 1041 const Type *const BaseType; 1042 1043 /// \brief The canonical type of this type. A QualType. 1044 QualType CanonicalType; 1045 1046 friend class QualType; 1047 friend class Type; 1048 friend class ExtQuals; 1049}; 1050 1051/// ExtQuals - We can encode up to four bits in the low bits of a 1052/// type pointer, but there are many more type qualifiers that we want 1053/// to be able to apply to an arbitrary type. Therefore we have this 1054/// struct, intended to be heap-allocated and used by QualType to 1055/// store qualifiers. 1056/// 1057/// The current design tags the 'const', 'restrict', and 'volatile' qualifiers 1058/// in three low bits on the QualType pointer; a fourth bit records whether 1059/// the pointer is an ExtQuals node. The extended qualifiers (address spaces, 1060/// Objective-C GC attributes) are much more rare. 1061class ExtQuals : public ExtQualsTypeCommonBase, public llvm::FoldingSetNode { 1062 // NOTE: changing the fast qualifiers should be straightforward as 1063 // long as you don't make 'const' non-fast. 1064 // 1. Qualifiers: 1065 // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). 1066 // Fast qualifiers must occupy the low-order bits. 1067 // b) Update Qualifiers::FastWidth and FastMask. 1068 // 2. QualType: 1069 // a) Update is{Volatile,Restrict}Qualified(), defined inline. 1070 // b) Update remove{Volatile,Restrict}, defined near the end of 1071 // this header. 1072 // 3. ASTContext: 1073 // a) Update get{Volatile,Restrict}Type. 1074 1075 /// Quals - the immutable set of qualifiers applied by this 1076 /// node; always contains extended qualifiers. 1077 Qualifiers Quals; 1078 1079 ExtQuals *this_() { return this; } 1080 1081public: 1082 ExtQuals(const Type *baseType, QualType canon, Qualifiers quals) 1083 : ExtQualsTypeCommonBase(baseType, 1084 canon.isNull() ? QualType(this_(), 0) : canon), 1085 Quals(quals) 1086 { 1087 assert(Quals.hasNonFastQualifiers() 1088 && "ExtQuals created with no fast qualifiers"); 1089 assert(!Quals.hasFastQualifiers() 1090 && "ExtQuals created with fast qualifiers"); 1091 } 1092 1093 Qualifiers getQualifiers() const { return Quals; } 1094 1095 bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } 1096 Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } 1097 1098 bool hasObjCLifetime() const { return Quals.hasObjCLifetime(); } 1099 Qualifiers::ObjCLifetime getObjCLifetime() const { 1100 return Quals.getObjCLifetime(); 1101 } 1102 1103 bool hasAddressSpace() const { return Quals.hasAddressSpace(); } 1104 unsigned getAddressSpace() const { return Quals.getAddressSpace(); } 1105 1106 const Type *getBaseType() const { return BaseType; } 1107 1108public: 1109 void Profile(llvm::FoldingSetNodeID &ID) const { 1110 Profile(ID, getBaseType(), Quals); 1111 } 1112 static void Profile(llvm::FoldingSetNodeID &ID, 1113 const Type *BaseType, 1114 Qualifiers Quals) { 1115 assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!"); 1116 ID.AddPointer(BaseType); 1117 Quals.Profile(ID); 1118 } 1119}; 1120 1121/// \brief The kind of C++0x ref-qualifier associated with a function type, 1122/// which determines whether a member function's "this" object can be an 1123/// lvalue, rvalue, or neither. 1124enum RefQualifierKind { 1125 /// \brief No ref-qualifier was provided. 1126 RQ_None = 0, 1127 /// \brief An lvalue ref-qualifier was provided (\c &). 1128 RQ_LValue, 1129 /// \brief An rvalue ref-qualifier was provided (\c &&). 1130 RQ_RValue 1131}; 1132 1133/// Type - This is the base class of the type hierarchy. A central concept 1134/// with types is that each type always has a canonical type. A canonical type 1135/// is the type with any typedef names stripped out of it or the types it 1136/// references. For example, consider: 1137/// 1138/// typedef int foo; 1139/// typedef foo* bar; 1140/// 'int *' 'foo *' 'bar' 1141/// 1142/// There will be a Type object created for 'int'. Since int is canonical, its 1143/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 1144/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 1145/// there is a PointerType that represents 'int*', which, like 'int', is 1146/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 1147/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 1148/// is also 'int*'. 1149/// 1150/// Non-canonical types are useful for emitting diagnostics, without losing 1151/// information about typedefs being used. Canonical types are useful for type 1152/// comparisons (they allow by-pointer equality tests) and useful for reasoning 1153/// about whether something has a particular form (e.g. is a function type), 1154/// because they implicitly, recursively, strip all typedefs out of a type. 1155/// 1156/// Types, once created, are immutable. 1157/// 1158class Type : public ExtQualsTypeCommonBase { 1159public: 1160 enum TypeClass { 1161#define TYPE(Class, Base) Class, 1162#define LAST_TYPE(Class) TypeLast = Class, 1163#define ABSTRACT_TYPE(Class, Base) 1164#include "clang/AST/TypeNodes.def" 1165 TagFirst = Record, TagLast = Enum 1166 }; 1167 1168private: 1169 Type(const Type &) LLVM_DELETED_FUNCTION; 1170 void operator=(const Type &) LLVM_DELETED_FUNCTION; 1171 1172 /// Bitfields required by the Type class. 1173 class TypeBitfields { 1174 friend class Type; 1175 template <class T> friend class TypePropertyCache; 1176 1177 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 1178 unsigned TC : 8; 1179 1180 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 1181 unsigned Dependent : 1; 1182 1183 /// \brief Whether this type somehow involves a template parameter, even 1184 /// if the resolution of the type does not depend on a template parameter. 1185 unsigned InstantiationDependent : 1; 1186 1187 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 1188 unsigned VariablyModified : 1; 1189 1190 /// \brief Whether this type contains an unexpanded parameter pack 1191 /// (for C++0x variadic templates). 1192 unsigned ContainsUnexpandedParameterPack : 1; 1193 1194 /// \brief Nonzero if the cache (i.e. the bitfields here starting 1195 /// with 'Cache') is valid. If so, then this is a 1196 /// LangOptions::VisibilityMode+1. 1197 mutable unsigned CacheValidAndVisibility : 2; 1198 1199 /// \brief True if the visibility was set explicitly in the source code. 1200 mutable unsigned CachedExplicitVisibility : 1; 1201 1202 /// \brief Linkage of this type. 1203 mutable unsigned CachedLinkage : 2; 1204 1205 /// \brief Whether this type involves and local or unnamed types. 1206 mutable unsigned CachedLocalOrUnnamed : 1; 1207 1208 /// \brief FromAST - Whether this type comes from an AST file. 1209 mutable unsigned FromAST : 1; 1210 1211 bool isCacheValid() const { 1212 return (CacheValidAndVisibility != 0); 1213 } 1214 Visibility getVisibility() const { 1215 assert(isCacheValid() && "getting linkage from invalid cache"); 1216 return static_cast<Visibility>(CacheValidAndVisibility-1); 1217 } 1218 bool isVisibilityExplicit() const { 1219 assert(isCacheValid() && "getting linkage from invalid cache"); 1220 return CachedExplicitVisibility; 1221 } 1222 Linkage getLinkage() const { 1223 assert(isCacheValid() && "getting linkage from invalid cache"); 1224 return static_cast<Linkage>(CachedLinkage); 1225 } 1226 bool hasLocalOrUnnamedType() const { 1227 assert(isCacheValid() && "getting linkage from invalid cache"); 1228 return CachedLocalOrUnnamed; 1229 } 1230 }; 1231 enum { NumTypeBits = 19 }; 1232 1233protected: 1234 // These classes allow subclasses to somewhat cleanly pack bitfields 1235 // into Type. 1236 1237 class ArrayTypeBitfields { 1238 friend class ArrayType; 1239 1240 unsigned : NumTypeBits; 1241 1242 /// IndexTypeQuals - CVR qualifiers from declarations like 1243 /// 'int X[static restrict 4]'. For function parameters only. 1244 unsigned IndexTypeQuals : 3; 1245 1246 /// SizeModifier - storage class qualifiers from declarations like 1247 /// 'int X[static restrict 4]'. For function parameters only. 1248 /// Actually an ArrayType::ArraySizeModifier. 1249 unsigned SizeModifier : 3; 1250 }; 1251 1252 class BuiltinTypeBitfields { 1253 friend class BuiltinType; 1254 1255 unsigned : NumTypeBits; 1256 1257 /// The kind (BuiltinType::Kind) of builtin type this is. 1258 unsigned Kind : 8; 1259 }; 1260 1261 class FunctionTypeBitfields { 1262 friend class FunctionType; 1263 1264 unsigned : NumTypeBits; 1265 1266 /// Extra information which affects how the function is called, like 1267 /// regparm and the calling convention. 1268 unsigned ExtInfo : 9; 1269 1270 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1271 /// other bitfields. 1272 /// The qualifiers are part of FunctionProtoType because... 1273 /// 1274 /// C++ 8.3.5p4: The return type, the parameter type list and the 1275 /// cv-qualifier-seq, [...], are part of the function type. 1276 unsigned TypeQuals : 3; 1277 }; 1278 1279 class ObjCObjectTypeBitfields { 1280 friend class ObjCObjectType; 1281 1282 unsigned : NumTypeBits; 1283 1284 /// NumProtocols - The number of protocols stored directly on this 1285 /// object type. 1286 unsigned NumProtocols : 32 - NumTypeBits; 1287 }; 1288 1289 class ReferenceTypeBitfields { 1290 friend class ReferenceType; 1291 1292 unsigned : NumTypeBits; 1293 1294 /// True if the type was originally spelled with an lvalue sigil. 1295 /// This is never true of rvalue references but can also be false 1296 /// on lvalue references because of C++0x [dcl.typedef]p9, 1297 /// as follows: 1298 /// 1299 /// typedef int &ref; // lvalue, spelled lvalue 1300 /// typedef int &&rvref; // rvalue 1301 /// ref &a; // lvalue, inner ref, spelled lvalue 1302 /// ref &&a; // lvalue, inner ref 1303 /// rvref &a; // lvalue, inner ref, spelled lvalue 1304 /// rvref &&a; // rvalue, inner ref 1305 unsigned SpelledAsLValue : 1; 1306 1307 /// True if the inner type is a reference type. This only happens 1308 /// in non-canonical forms. 1309 unsigned InnerRef : 1; 1310 }; 1311 1312 class TypeWithKeywordBitfields { 1313 friend class TypeWithKeyword; 1314 1315 unsigned : NumTypeBits; 1316 1317 /// An ElaboratedTypeKeyword. 8 bits for efficient access. 1318 unsigned Keyword : 8; 1319 }; 1320 1321 class VectorTypeBitfields { 1322 friend class VectorType; 1323 1324 unsigned : NumTypeBits; 1325 1326 /// VecKind - The kind of vector, either a generic vector type or some 1327 /// target-specific vector type such as for AltiVec or Neon. 1328 unsigned VecKind : 3; 1329 1330 /// NumElements - The number of elements in the vector. 1331 unsigned NumElements : 29 - NumTypeBits; 1332 }; 1333 1334 class AttributedTypeBitfields { 1335 friend class AttributedType; 1336 1337 unsigned : NumTypeBits; 1338 1339 /// AttrKind - an AttributedType::Kind 1340 unsigned AttrKind : 32 - NumTypeBits; 1341 }; 1342 1343 union { 1344 TypeBitfields TypeBits; 1345 ArrayTypeBitfields ArrayTypeBits; 1346 AttributedTypeBitfields AttributedTypeBits; 1347 BuiltinTypeBitfields BuiltinTypeBits; 1348 FunctionTypeBitfields FunctionTypeBits; 1349 ObjCObjectTypeBitfields ObjCObjectTypeBits; 1350 ReferenceTypeBitfields ReferenceTypeBits; 1351 TypeWithKeywordBitfields TypeWithKeywordBits; 1352 VectorTypeBitfields VectorTypeBits; 1353 }; 1354 1355private: 1356 /// \brief Set whether this type comes from an AST file. 1357 void setFromAST(bool V = true) const { 1358 TypeBits.FromAST = V; 1359 } 1360 1361 template <class T> friend class TypePropertyCache; 1362 1363protected: 1364 // silence VC++ warning C4355: 'this' : used in base member initializer list 1365 Type *this_() { return this; } 1366 Type(TypeClass tc, QualType canon, bool Dependent, 1367 bool InstantiationDependent, bool VariablyModified, 1368 bool ContainsUnexpandedParameterPack) 1369 : ExtQualsTypeCommonBase(this, 1370 canon.isNull() ? QualType(this_(), 0) : canon) { 1371 TypeBits.TC = tc; 1372 TypeBits.Dependent = Dependent; 1373 TypeBits.InstantiationDependent = Dependent || InstantiationDependent; 1374 TypeBits.VariablyModified = VariablyModified; 1375 TypeBits.ContainsUnexpandedParameterPack = ContainsUnexpandedParameterPack; 1376 TypeBits.CacheValidAndVisibility = 0; 1377 TypeBits.CachedExplicitVisibility = false; 1378 TypeBits.CachedLocalOrUnnamed = false; 1379 TypeBits.CachedLinkage = NoLinkage; 1380 TypeBits.FromAST = false; 1381 } 1382 friend class ASTContext; 1383 1384 void setDependent(bool D = true) { 1385 TypeBits.Dependent = D; 1386 if (D) 1387 TypeBits.InstantiationDependent = true; 1388 } 1389 void setInstantiationDependent(bool D = true) { 1390 TypeBits.InstantiationDependent = D; } 1391 void setVariablyModified(bool VM = true) { TypeBits.VariablyModified = VM; 1392 } 1393 void setContainsUnexpandedParameterPack(bool PP = true) { 1394 TypeBits.ContainsUnexpandedParameterPack = PP; 1395 } 1396 1397public: 1398 TypeClass getTypeClass() const { return static_cast<TypeClass>(TypeBits.TC); } 1399 1400 /// \brief Whether this type comes from an AST file. 1401 bool isFromAST() const { return TypeBits.FromAST; } 1402 1403 /// \brief Whether this type is or contains an unexpanded parameter 1404 /// pack, used to support C++0x variadic templates. 1405 /// 1406 /// A type that contains a parameter pack shall be expanded by the 1407 /// ellipsis operator at some point. For example, the typedef in the 1408 /// following example contains an unexpanded parameter pack 'T': 1409 /// 1410 /// \code 1411 /// template<typename ...T> 1412 /// struct X { 1413 /// typedef T* pointer_types; // ill-formed; T is a parameter pack. 1414 /// }; 1415 /// \endcode 1416 /// 1417 /// Note that this routine does not specify which 1418 bool containsUnexpandedParameterPack() const { 1419 return TypeBits.ContainsUnexpandedParameterPack; 1420 } 1421 1422 /// Determines if this type would be canonical if it had no further 1423 /// qualification. 1424 bool isCanonicalUnqualified() const { 1425 return CanonicalType == QualType(this, 0); 1426 } 1427 1428 /// Pull a single level of sugar off of this locally-unqualified type. 1429 /// Users should generally prefer SplitQualType::getSingleStepDesugaredType() 1430 /// or QualType::getSingleStepDesugaredType(const ASTContext&). 1431 QualType getLocallyUnqualifiedSingleStepDesugaredType() const; 1432 1433 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 1434 /// object types, function types, and incomplete types. 1435 1436 /// isIncompleteType - Return true if this is an incomplete type. 1437 /// A type that can describe objects, but which lacks information needed to 1438 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 1439 /// routine will need to determine if the size is actually required. 1440 /// 1441 /// \brief Def If non-NULL, and the type refers to some kind of declaration 1442 /// that can be completed (such as a C struct, C++ class, or Objective-C 1443 /// class), will be set to the declaration. 1444 bool isIncompleteType(NamedDecl **Def = 0) const; 1445 1446 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 1447 /// type, in other words, not a function type. 1448 bool isIncompleteOrObjectType() const { 1449 return !isFunctionType(); 1450 } 1451 1452 /// \brief Determine whether this type is an object type. 1453 bool isObjectType() const { 1454 // C++ [basic.types]p8: 1455 // An object type is a (possibly cv-qualified) type that is not a 1456 // function type, not a reference type, and not a void type. 1457 return !isReferenceType() && !isFunctionType() && !isVoidType(); 1458 } 1459 1460 /// isLiteralType - Return true if this is a literal type 1461 /// (C++0x [basic.types]p10) 1462 bool isLiteralType() const; 1463 1464 /// \brief Test if this type is a standard-layout type. 1465 /// (C++0x [basic.type]p9) 1466 bool isStandardLayoutType() const; 1467 1468 /// Helper methods to distinguish type categories. All type predicates 1469 /// operate on the canonical type, ignoring typedefs and qualifiers. 1470 1471 /// isBuiltinType - returns true if the type is a builtin type. 1472 bool isBuiltinType() const; 1473 1474 /// isSpecificBuiltinType - Test for a particular builtin type. 1475 bool isSpecificBuiltinType(unsigned K) const; 1476 1477 /// isPlaceholderType - Test for a type which does not represent an 1478 /// actual type-system type but is instead used as a placeholder for 1479 /// various convenient purposes within Clang. All such types are 1480 /// BuiltinTypes. 1481 bool isPlaceholderType() const; 1482 const BuiltinType *getAsPlaceholderType() const; 1483 1484 /// isSpecificPlaceholderType - Test for a specific placeholder type. 1485 bool isSpecificPlaceholderType(unsigned K) const; 1486 1487 /// isNonOverloadPlaceholderType - Test for a placeholder type 1488 /// other than Overload; see BuiltinType::isNonOverloadPlaceholderType. 1489 bool isNonOverloadPlaceholderType() const; 1490 1491 /// isIntegerType() does *not* include complex integers (a GCC extension). 1492 /// isComplexIntegerType() can be used to test for complex integers. 1493 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 1494 bool isEnumeralType() const; 1495 bool isBooleanType() const; 1496 bool isCharType() const; 1497 bool isWideCharType() const; 1498 bool isChar16Type() const; 1499 bool isChar32Type() const; 1500 bool isAnyCharacterType() const; 1501 bool isIntegralType(ASTContext &Ctx) const; 1502 1503 /// \brief Determine whether this type is an integral or enumeration type. 1504 bool isIntegralOrEnumerationType() const; 1505 /// \brief Determine whether this type is an integral or unscoped enumeration 1506 /// type. 1507 bool isIntegralOrUnscopedEnumerationType() const; 1508 1509 /// Floating point categories. 1510 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 1511 /// isComplexType() does *not* include complex integers (a GCC extension). 1512 /// isComplexIntegerType() can be used to test for complex integers. 1513 bool isComplexType() const; // C99 6.2.5p11 (complex) 1514 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 1515 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 1516 bool isHalfType() const; // OpenCL 6.1.1.1, NEON (IEEE 754-2008 half) 1517 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 1518 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 1519 bool isVoidType() const; // C99 6.2.5p19 1520 bool isDerivedType() const; // C99 6.2.5p20 1521 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 1522 bool isAggregateType() const; 1523 bool isFundamentalType() const; 1524 bool isCompoundType() const; 1525 1526 // Type Predicates: Check to see if this type is structurally the specified 1527 // type, ignoring typedefs and qualifiers. 1528 bool isFunctionType() const; 1529 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 1530 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 1531 bool isPointerType() const; 1532 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 1533 bool isBlockPointerType() const; 1534 bool isVoidPointerType() const; 1535 bool isReferenceType() const; 1536 bool isLValueReferenceType() const; 1537 bool isRValueReferenceType() const; 1538 bool isFunctionPointerType() const; 1539 bool isMemberPointerType() const; 1540 bool isMemberFunctionPointerType() const; 1541 bool isMemberDataPointerType() const; 1542 bool isArrayType() const; 1543 bool isConstantArrayType() const; 1544 bool isIncompleteArrayType() const; 1545 bool isVariableArrayType() const; 1546 bool isDependentSizedArrayType() const; 1547 bool isRecordType() const; 1548 bool isClassType() const; 1549 bool isStructureType() const; 1550 bool isInterfaceType() const; 1551 bool isStructureOrClassType() const; 1552 bool isUnionType() const; 1553 bool isComplexIntegerType() const; // GCC _Complex integer type. 1554 bool isVectorType() const; // GCC vector type. 1555 bool isExtVectorType() const; // Extended vector type. 1556 bool isObjCObjectPointerType() const; // pointer to ObjC object 1557 bool isObjCRetainableType() const; // ObjC object or block pointer 1558 bool isObjCLifetimeType() const; // (array of)* retainable type 1559 bool isObjCIndirectLifetimeType() const; // (pointer to)* lifetime type 1560 bool isObjCNSObjectType() const; // __attribute__((NSObject)) 1561 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 1562 // for the common case. 1563 bool isObjCObjectType() const; // NSString or typeof(*(id)0) 1564 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 1565 bool isObjCQualifiedIdType() const; // id<foo> 1566 bool isObjCQualifiedClassType() const; // Class<foo> 1567 bool isObjCObjectOrInterfaceType() const; 1568 bool isObjCIdType() const; // id 1569 bool isObjCClassType() const; // Class 1570 bool isObjCSelType() const; // Class 1571 bool isObjCBuiltinType() const; // 'id' or 'Class' 1572 bool isObjCARCBridgableType() const; 1573 bool isCARCBridgableType() const; 1574 bool isTemplateTypeParmType() const; // C++ template type parameter 1575 bool isNullPtrType() const; // C++0x nullptr_t 1576 bool isAtomicType() const; // C11 _Atomic() 1577 1578 bool isImage1dT() const; // OpenCL image1d_t 1579 bool isImage1dArrayT() const; // OpenCL image1d_array_t 1580 bool isImage1dBufferT() const; // OpenCL image1d_buffer_t 1581 bool isImage2dT() const; // OpenCL image2d_t 1582 bool isImage2dArrayT() const; // OpenCL image2d_array_t 1583 bool isImage3dT() const; // OpenCL image3d_t 1584 1585 bool isImageType() const; // Any OpenCL image type 1586 1587 bool isOpenCLSpecificType() const; // Any OpenCL specific type 1588 1589 /// Determines if this type, which must satisfy 1590 /// isObjCLifetimeType(), is implicitly __unsafe_unretained rather 1591 /// than implicitly __strong. 1592 bool isObjCARCImplicitlyUnretainedType() const; 1593 1594 /// Return the implicit lifetime for this type, which must not be dependent. 1595 Qualifiers::ObjCLifetime getObjCARCImplicitLifetime() const; 1596 1597 enum ScalarTypeKind { 1598 STK_CPointer, 1599 STK_BlockPointer, 1600 STK_ObjCObjectPointer, 1601 STK_MemberPointer, 1602 STK_Bool, 1603 STK_Integral, 1604 STK_Floating, 1605 STK_IntegralComplex, 1606 STK_FloatingComplex 1607 }; 1608 /// getScalarTypeKind - Given that this is a scalar type, classify it. 1609 ScalarTypeKind getScalarTypeKind() const; 1610 1611 /// isDependentType - Whether this type is a dependent type, meaning 1612 /// that its definition somehow depends on a template parameter 1613 /// (C++ [temp.dep.type]). 1614 bool isDependentType() const { return TypeBits.Dependent; } 1615 1616 /// \brief Determine whether this type is an instantiation-dependent type, 1617 /// meaning that the type involves a template parameter (even if the 1618 /// definition does not actually depend on the type substituted for that 1619 /// template parameter). 1620 bool isInstantiationDependentType() const { 1621 return TypeBits.InstantiationDependent; 1622 } 1623 1624 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 1625 bool isVariablyModifiedType() const { return TypeBits.VariablyModified; } 1626 1627 /// \brief Whether this type involves a variable-length array type 1628 /// with a definite size. 1629 bool hasSizedVLAType() const; 1630 1631 /// \brief Whether this type is or contains a local or unnamed type. 1632 bool hasUnnamedOrLocalType() const; 1633 1634 bool isOverloadableType() const; 1635 1636 /// \brief Determine wither this type is a C++ elaborated-type-specifier. 1637 bool isElaboratedTypeSpecifier() const; 1638 1639 bool canDecayToPointerType() const; 1640 1641 /// hasPointerRepresentation - Whether this type is represented 1642 /// natively as a pointer; this includes pointers, references, block 1643 /// pointers, and Objective-C interface, qualified id, and qualified 1644 /// interface types, as well as nullptr_t. 1645 bool hasPointerRepresentation() const; 1646 1647 /// hasObjCPointerRepresentation - Whether this type can represent 1648 /// an objective pointer type for the purpose of GC'ability 1649 bool hasObjCPointerRepresentation() const; 1650 1651 /// \brief Determine whether this type has an integer representation 1652 /// of some sort, e.g., it is an integer type or a vector. 1653 bool hasIntegerRepresentation() const; 1654 1655 /// \brief Determine whether this type has an signed integer representation 1656 /// of some sort, e.g., it is an signed integer type or a vector. 1657 bool hasSignedIntegerRepresentation() const; 1658 1659 /// \brief Determine whether this type has an unsigned integer representation 1660 /// of some sort, e.g., it is an unsigned integer type or a vector. 1661 bool hasUnsignedIntegerRepresentation() const; 1662 1663 /// \brief Determine whether this type has a floating-point representation 1664 /// of some sort, e.g., it is a floating-point type or a vector thereof. 1665 bool hasFloatingRepresentation() const; 1666 1667 // Type Checking Functions: Check to see if this type is structurally the 1668 // specified type, ignoring typedefs and qualifiers, and return a pointer to 1669 // the best type we can. 1670 const RecordType *getAsStructureType() const; 1671 /// NOTE: getAs*ArrayType are methods on ASTContext. 1672 const RecordType *getAsUnionType() const; 1673 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 1674 // The following is a convenience method that returns an ObjCObjectPointerType 1675 // for object declared using an interface. 1676 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 1677 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 1678 const ObjCObjectPointerType *getAsObjCQualifiedClassType() const; 1679 const ObjCObjectType *getAsObjCQualifiedInterfaceType() const; 1680 1681 /// \brief Retrieves the CXXRecordDecl that this type refers to, either 1682 /// because the type is a RecordType or because it is the injected-class-name 1683 /// type of a class template or class template partial specialization. 1684 CXXRecordDecl *getAsCXXRecordDecl() const; 1685 1686 /// If this is a pointer or reference to a RecordType, return the 1687 /// CXXRecordDecl that that type refers to. 1688 /// 1689 /// If this is not a pointer or reference, or the type being pointed to does 1690 /// not refer to a CXXRecordDecl, returns NULL. 1691 const CXXRecordDecl *getPointeeCXXRecordDecl() const; 1692 1693 /// \brief Get the AutoType whose type will be deduced for a variable with 1694 /// an initializer of this type. This looks through declarators like pointer 1695 /// types, but not through decltype or typedefs. 1696 AutoType *getContainedAutoType() const; 1697 1698 /// Member-template getAs<specific type>'. Look through sugar for 1699 /// an instance of \<specific type>. This scheme will eventually 1700 /// replace the specific getAsXXXX methods above. 1701 /// 1702 /// There are some specializations of this member template listed 1703 /// immediately following this class. 1704 template <typename T> const T *getAs() const; 1705 1706 /// A variant of getAs<> for array types which silently discards 1707 /// qualifiers from the outermost type. 1708 const ArrayType *getAsArrayTypeUnsafe() const; 1709 1710 /// Member-template castAs<specific type>. Look through sugar for 1711 /// the underlying instance of \<specific type>. 1712 /// 1713 /// This method has the same relationship to getAs<T> as cast<T> has 1714 /// to dyn_cast<T>; which is to say, the underlying type *must* 1715 /// have the intended type, and this method will never return null. 1716 template <typename T> const T *castAs() const; 1717 1718 /// A variant of castAs<> for array type which silently discards 1719 /// qualifiers from the outermost type. 1720 const ArrayType *castAsArrayTypeUnsafe() const; 1721 1722 /// getBaseElementTypeUnsafe - Get the base element type of this 1723 /// type, potentially discarding type qualifiers. This method 1724 /// should never be used when type qualifiers are meaningful. 1725 const Type *getBaseElementTypeUnsafe() const; 1726 1727 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 1728 /// element type of the array, potentially with type qualifiers missing. 1729 /// This method should never be used when type qualifiers are meaningful. 1730 const Type *getArrayElementTypeNoTypeQual() const; 1731 1732 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 1733 /// pointer, this returns the respective pointee. 1734 QualType getPointeeType() const; 1735 1736 /// getUnqualifiedDesugaredType() - Return the specified type with 1737 /// any "sugar" removed from the type, removing any typedefs, 1738 /// typeofs, etc., as well as any qualifiers. 1739 const Type *getUnqualifiedDesugaredType() const; 1740 1741 /// More type predicates useful for type checking/promotion 1742 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 1743 1744 /// isSignedIntegerType - Return true if this is an integer type that is 1745 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 1746 /// or an enum decl which has a signed representation. 1747 bool isSignedIntegerType() const; 1748 1749 /// isUnsignedIntegerType - Return true if this is an integer type that is 1750 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], 1751 /// or an enum decl which has an unsigned representation. 1752 bool isUnsignedIntegerType() const; 1753 1754 /// Determines whether this is an integer type that is signed or an 1755 /// enumeration types whose underlying type is a signed integer type. 1756 bool isSignedIntegerOrEnumerationType() const; 1757 1758 /// Determines whether this is an integer type that is unsigned or an 1759 /// enumeration types whose underlying type is a unsigned integer type. 1760 bool isUnsignedIntegerOrEnumerationType() const; 1761 1762 /// isConstantSizeType - Return true if this is not a variable sized type, 1763 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 1764 /// incomplete types. 1765 bool isConstantSizeType() const; 1766 1767 /// isSpecifierType - Returns true if this type can be represented by some 1768 /// set of type specifiers. 1769 bool isSpecifierType() const; 1770 1771 /// \brief Determine the linkage of this type. 1772 Linkage getLinkage() const; 1773 1774 /// \brief Determine the visibility of this type. 1775 Visibility getVisibility() const; 1776 1777 /// \brief Return true if the visibility was explicitly set is the code. 1778 bool isVisibilityExplicit() const; 1779 1780 /// \brief Determine the linkage and visibility of this type. 1781 std::pair<Linkage,Visibility> getLinkageAndVisibility() const; 1782 1783 /// \brief Note that the linkage is no longer known. 1784 void ClearLinkageCache(); 1785 1786 const char *getTypeClassName() const; 1787 1788 QualType getCanonicalTypeInternal() const { 1789 return CanonicalType; 1790 } 1791 CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h 1792 LLVM_ATTRIBUTE_USED void dump() const; 1793 1794 friend class ASTReader; 1795 friend class ASTWriter; 1796}; 1797 1798/// \brief This will check for a TypedefType by removing any existing sugar 1799/// until it reaches a TypedefType or a non-sugared type. 1800template <> const TypedefType *Type::getAs() const; 1801 1802/// \brief This will check for a TemplateSpecializationType by removing any 1803/// existing sugar until it reaches a TemplateSpecializationType or a 1804/// non-sugared type. 1805template <> const TemplateSpecializationType *Type::getAs() const; 1806 1807// We can do canonical leaf types faster, because we don't have to 1808// worry about preserving child type decoration. 1809#define TYPE(Class, Base) 1810#define LEAF_TYPE(Class) \ 1811template <> inline const Class##Type *Type::getAs() const { \ 1812 return dyn_cast<Class##Type>(CanonicalType); \ 1813} \ 1814template <> inline const Class##Type *Type::castAs() const { \ 1815 return cast<Class##Type>(CanonicalType); \ 1816} 1817#include "clang/AST/TypeNodes.def" 1818 1819 1820/// BuiltinType - This class is used for builtin types like 'int'. Builtin 1821/// types are always canonical and have a literal name field. 1822class BuiltinType : public Type { 1823public: 1824 enum Kind { 1825#define BUILTIN_TYPE(Id, SingletonId) Id, 1826#define LAST_BUILTIN_TYPE(Id) LastKind = Id 1827#include "clang/AST/BuiltinTypes.def" 1828 }; 1829 1830public: 1831 BuiltinType(Kind K) 1832 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent), 1833 /*InstantiationDependent=*/(K == Dependent), 1834 /*VariablyModified=*/false, 1835 /*Unexpanded paramter pack=*/false) { 1836 BuiltinTypeBits.Kind = K; 1837 } 1838 1839 Kind getKind() const { return static_cast<Kind>(BuiltinTypeBits.Kind); } 1840 StringRef getName(const PrintingPolicy &Policy) const; 1841 const char *getNameAsCString(const PrintingPolicy &Policy) const { 1842 // The StringRef is null-terminated. 1843 StringRef str = getName(Policy); 1844 assert(!str.empty() && str.data()[str.size()] == '\0'); 1845 return str.data(); 1846 } 1847 1848 bool isSugared() const { return false; } 1849 QualType desugar() const { return QualType(this, 0); } 1850 1851 bool isInteger() const { 1852 return getKind() >= Bool && getKind() <= Int128; 1853 } 1854 1855 bool isSignedInteger() const { 1856 return getKind() >= Char_S && getKind() <= Int128; 1857 } 1858 1859 bool isUnsignedInteger() const { 1860 return getKind() >= Bool && getKind() <= UInt128; 1861 } 1862 1863 bool isFloatingPoint() const { 1864 return getKind() >= Half && getKind() <= LongDouble; 1865 } 1866 1867 /// Determines whether the given kind corresponds to a placeholder type. 1868 static bool isPlaceholderTypeKind(Kind K) { 1869 return K >= Overload; 1870 } 1871 1872 /// Determines whether this type is a placeholder type, i.e. a type 1873 /// which cannot appear in arbitrary positions in a fully-formed 1874 /// expression. 1875 bool isPlaceholderType() const { 1876 return isPlaceholderTypeKind(getKind()); 1877 } 1878 1879 /// Determines whether this type is a placeholder type other than 1880 /// Overload. Most placeholder types require only syntactic 1881 /// information about their context in order to be resolved (e.g. 1882 /// whether it is a call expression), which means they can (and 1883 /// should) be resolved in an earlier "phase" of analysis. 1884 /// Overload expressions sometimes pick up further information 1885 /// from their context, like whether the context expects a 1886 /// specific function-pointer type, and so frequently need 1887 /// special treatment. 1888 bool isNonOverloadPlaceholderType() const { 1889 return getKind() > Overload; 1890 } 1891 1892 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1893}; 1894 1895/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1896/// types (_Complex float etc) as well as the GCC integer complex extensions. 1897/// 1898class ComplexType : public Type, public llvm::FoldingSetNode { 1899 QualType ElementType; 1900 ComplexType(QualType Element, QualType CanonicalPtr) : 1901 Type(Complex, CanonicalPtr, Element->isDependentType(), 1902 Element->isInstantiationDependentType(), 1903 Element->isVariablyModifiedType(), 1904 Element->containsUnexpandedParameterPack()), 1905 ElementType(Element) { 1906 } 1907 friend class ASTContext; // ASTContext creates these. 1908 1909public: 1910 QualType getElementType() const { return ElementType; } 1911 1912 bool isSugared() const { return false; } 1913 QualType desugar() const { return QualType(this, 0); } 1914 1915 void Profile(llvm::FoldingSetNodeID &ID) { 1916 Profile(ID, getElementType()); 1917 } 1918 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1919 ID.AddPointer(Element.getAsOpaquePtr()); 1920 } 1921 1922 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1923}; 1924 1925/// ParenType - Sugar for parentheses used when specifying types. 1926/// 1927class ParenType : public Type, public llvm::FoldingSetNode { 1928 QualType Inner; 1929 1930 ParenType(QualType InnerType, QualType CanonType) : 1931 Type(Paren, CanonType, InnerType->isDependentType(), 1932 InnerType->isInstantiationDependentType(), 1933 InnerType->isVariablyModifiedType(), 1934 InnerType->containsUnexpandedParameterPack()), 1935 Inner(InnerType) { 1936 } 1937 friend class ASTContext; // ASTContext creates these. 1938 1939public: 1940 1941 QualType getInnerType() const { return Inner; } 1942 1943 bool isSugared() const { return true; } 1944 QualType desugar() const { return getInnerType(); } 1945 1946 void Profile(llvm::FoldingSetNodeID &ID) { 1947 Profile(ID, getInnerType()); 1948 } 1949 static void Profile(llvm::FoldingSetNodeID &ID, QualType Inner) { 1950 Inner.Profile(ID); 1951 } 1952 1953 static bool classof(const Type *T) { return T->getTypeClass() == Paren; } 1954}; 1955 1956/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1957/// 1958class PointerType : public Type, public llvm::FoldingSetNode { 1959 QualType PointeeType; 1960 1961 PointerType(QualType Pointee, QualType CanonicalPtr) : 1962 Type(Pointer, CanonicalPtr, Pointee->isDependentType(), 1963 Pointee->isInstantiationDependentType(), 1964 Pointee->isVariablyModifiedType(), 1965 Pointee->containsUnexpandedParameterPack()), 1966 PointeeType(Pointee) { 1967 } 1968 friend class ASTContext; // ASTContext creates these. 1969 1970public: 1971 1972 QualType getPointeeType() const { return PointeeType; } 1973 1974 bool isSugared() const { return false; } 1975 QualType desugar() const { return QualType(this, 0); } 1976 1977 void Profile(llvm::FoldingSetNodeID &ID) { 1978 Profile(ID, getPointeeType()); 1979 } 1980 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1981 ID.AddPointer(Pointee.getAsOpaquePtr()); 1982 } 1983 1984 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1985}; 1986 1987/// BlockPointerType - pointer to a block type. 1988/// This type is to represent types syntactically represented as 1989/// "void (^)(int)", etc. Pointee is required to always be a function type. 1990/// 1991class BlockPointerType : public Type, public llvm::FoldingSetNode { 1992 QualType PointeeType; // Block is some kind of pointer type 1993 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1994 Type(BlockPointer, CanonicalCls, Pointee->isDependentType(), 1995 Pointee->isInstantiationDependentType(), 1996 Pointee->isVariablyModifiedType(), 1997 Pointee->containsUnexpandedParameterPack()), 1998 PointeeType(Pointee) { 1999 } 2000 friend class ASTContext; // ASTContext creates these. 2001 2002public: 2003 2004 // Get the pointee type. Pointee is required to always be a function type. 2005 QualType getPointeeType() const { return PointeeType; } 2006 2007 bool isSugared() const { return false; } 2008 QualType desugar() const { return QualType(this, 0); } 2009 2010 void Profile(llvm::FoldingSetNodeID &ID) { 2011 Profile(ID, getPointeeType()); 2012 } 2013 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 2014 ID.AddPointer(Pointee.getAsOpaquePtr()); 2015 } 2016 2017 static bool classof(const Type *T) { 2018 return T->getTypeClass() == BlockPointer; 2019 } 2020}; 2021 2022/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 2023/// 2024class ReferenceType : public Type, public llvm::FoldingSetNode { 2025 QualType PointeeType; 2026 2027protected: 2028 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 2029 bool SpelledAsLValue) : 2030 Type(tc, CanonicalRef, Referencee->isDependentType(), 2031 Referencee->isInstantiationDependentType(), 2032 Referencee->isVariablyModifiedType(), 2033 Referencee->containsUnexpandedParameterPack()), 2034 PointeeType(Referencee) 2035 { 2036 ReferenceTypeBits.SpelledAsLValue = SpelledAsLValue; 2037 ReferenceTypeBits.InnerRef = Referencee->isReferenceType(); 2038 } 2039 2040public: 2041 bool isSpelledAsLValue() const { return ReferenceTypeBits.SpelledAsLValue; } 2042 bool isInnerRef() const { return ReferenceTypeBits.InnerRef; } 2043 2044 QualType getPointeeTypeAsWritten() const { return PointeeType; } 2045 QualType getPointeeType() const { 2046 // FIXME: this might strip inner qualifiers; okay? 2047 const ReferenceType *T = this; 2048 while (T->isInnerRef()) 2049 T = T->PointeeType->castAs<ReferenceType>(); 2050 return T->PointeeType; 2051 } 2052 2053 void Profile(llvm::FoldingSetNodeID &ID) { 2054 Profile(ID, PointeeType, isSpelledAsLValue()); 2055 } 2056 static void Profile(llvm::FoldingSetNodeID &ID, 2057 QualType Referencee, 2058 bool SpelledAsLValue) { 2059 ID.AddPointer(Referencee.getAsOpaquePtr()); 2060 ID.AddBoolean(SpelledAsLValue); 2061 } 2062 2063 static bool classof(const Type *T) { 2064 return T->getTypeClass() == LValueReference || 2065 T->getTypeClass() == RValueReference; 2066 } 2067}; 2068 2069/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 2070/// 2071class LValueReferenceType : public ReferenceType { 2072 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 2073 bool SpelledAsLValue) : 2074 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 2075 {} 2076 friend class ASTContext; // ASTContext creates these 2077public: 2078 bool isSugared() const { return false; } 2079 QualType desugar() const { return QualType(this, 0); } 2080 2081 static bool classof(const Type *T) { 2082 return T->getTypeClass() == LValueReference; 2083 } 2084}; 2085 2086/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 2087/// 2088class RValueReferenceType : public ReferenceType { 2089 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 2090 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 2091 } 2092 friend class ASTContext; // ASTContext creates these 2093public: 2094 bool isSugared() const { return false; } 2095 QualType desugar() const { return QualType(this, 0); } 2096 2097 static bool classof(const Type *T) { 2098 return T->getTypeClass() == RValueReference; 2099 } 2100}; 2101 2102/// MemberPointerType - C++ 8.3.3 - Pointers to members 2103/// 2104class MemberPointerType : public Type, public llvm::FoldingSetNode { 2105 QualType PointeeType; 2106 /// The class of which the pointee is a member. Must ultimately be a 2107 /// RecordType, but could be a typedef or a template parameter too. 2108 const Type *Class; 2109 2110 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 2111 Type(MemberPointer, CanonicalPtr, 2112 Cls->isDependentType() || Pointee->isDependentType(), 2113 (Cls->isInstantiationDependentType() || 2114 Pointee->isInstantiationDependentType()), 2115 Pointee->isVariablyModifiedType(), 2116 (Cls->containsUnexpandedParameterPack() || 2117 Pointee->containsUnexpandedParameterPack())), 2118 PointeeType(Pointee), Class(Cls) { 2119 } 2120 friend class ASTContext; // ASTContext creates these. 2121 2122public: 2123 QualType getPointeeType() const { return PointeeType; } 2124 2125 /// Returns true if the member type (i.e. the pointee type) is a 2126 /// function type rather than a data-member type. 2127 bool isMemberFunctionPointer() const { 2128 return PointeeType->isFunctionProtoType(); 2129 } 2130 2131 /// Returns true if the member type (i.e. the pointee type) is a 2132 /// data type rather than a function type. 2133 bool isMemberDataPointer() const { 2134 return !PointeeType->isFunctionProtoType(); 2135 } 2136 2137 const Type *getClass() const { return Class; } 2138 2139 bool isSugared() const { return false; } 2140 QualType desugar() const { return QualType(this, 0); } 2141 2142 void Profile(llvm::FoldingSetNodeID &ID) { 2143 Profile(ID, getPointeeType(), getClass()); 2144 } 2145 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 2146 const Type *Class) { 2147 ID.AddPointer(Pointee.getAsOpaquePtr()); 2148 ID.AddPointer(Class); 2149 } 2150 2151 static bool classof(const Type *T) { 2152 return T->getTypeClass() == MemberPointer; 2153 } 2154}; 2155 2156/// ArrayType - C99 6.7.5.2 - Array Declarators. 2157/// 2158class ArrayType : public Type, public llvm::FoldingSetNode { 2159public: 2160 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 2161 /// an array with a static size (e.g. int X[static 4]), or an array 2162 /// with a star size (e.g. int X[*]). 2163 /// 'static' is only allowed on function parameters. 2164 enum ArraySizeModifier { 2165 Normal, Static, Star 2166 }; 2167private: 2168 /// ElementType - The element type of the array. 2169 QualType ElementType; 2170 2171protected: 2172 // C++ [temp.dep.type]p1: 2173 // A type is dependent if it is... 2174 // - an array type constructed from any dependent type or whose 2175 // size is specified by a constant expression that is 2176 // value-dependent, 2177 ArrayType(TypeClass tc, QualType et, QualType can, 2178 ArraySizeModifier sm, unsigned tq, 2179 bool ContainsUnexpandedParameterPack) 2180 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray, 2181 et->isInstantiationDependentType() || tc == DependentSizedArray, 2182 (tc == VariableArray || et->isVariablyModifiedType()), 2183 ContainsUnexpandedParameterPack), 2184 ElementType(et) { 2185 ArrayTypeBits.IndexTypeQuals = tq; 2186 ArrayTypeBits.SizeModifier = sm; 2187 } 2188 2189 friend class ASTContext; // ASTContext creates these. 2190 2191public: 2192 QualType getElementType() const { return ElementType; } 2193 ArraySizeModifier getSizeModifier() const { 2194 return ArraySizeModifier(ArrayTypeBits.SizeModifier); 2195 } 2196 Qualifiers getIndexTypeQualifiers() const { 2197 return Qualifiers::fromCVRMask(getIndexTypeCVRQualifiers()); 2198 } 2199 unsigned getIndexTypeCVRQualifiers() const { 2200 return ArrayTypeBits.IndexTypeQuals; 2201 } 2202 2203 static bool classof(const Type *T) { 2204 return T->getTypeClass() == ConstantArray || 2205 T->getTypeClass() == VariableArray || 2206 T->getTypeClass() == IncompleteArray || 2207 T->getTypeClass() == DependentSizedArray; 2208 } 2209}; 2210 2211/// ConstantArrayType - This class represents the canonical version of 2212/// C arrays with a specified constant size. For example, the canonical 2213/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 2214/// type is 'int' and the size is 404. 2215class ConstantArrayType : public ArrayType { 2216 llvm::APInt Size; // Allows us to unique the type. 2217 2218 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 2219 ArraySizeModifier sm, unsigned tq) 2220 : ArrayType(ConstantArray, et, can, sm, tq, 2221 et->containsUnexpandedParameterPack()), 2222 Size(size) {} 2223protected: 2224 ConstantArrayType(TypeClass tc, QualType et, QualType can, 2225 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 2226 : ArrayType(tc, et, can, sm, tq, et->containsUnexpandedParameterPack()), 2227 Size(size) {} 2228 friend class ASTContext; // ASTContext creates these. 2229public: 2230 const llvm::APInt &getSize() const { return Size; } 2231 bool isSugared() const { return false; } 2232 QualType desugar() const { return QualType(this, 0); } 2233 2234 2235 /// \brief Determine the number of bits required to address a member of 2236 // an array with the given element type and number of elements. 2237 static unsigned getNumAddressingBits(ASTContext &Context, 2238 QualType ElementType, 2239 const llvm::APInt &NumElements); 2240 2241 /// \brief Determine the maximum number of active bits that an array's size 2242 /// can require, which limits the maximum size of the array. 2243 static unsigned getMaxSizeBits(ASTContext &Context); 2244 2245 void Profile(llvm::FoldingSetNodeID &ID) { 2246 Profile(ID, getElementType(), getSize(), 2247 getSizeModifier(), getIndexTypeCVRQualifiers()); 2248 } 2249 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 2250 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 2251 unsigned TypeQuals) { 2252 ID.AddPointer(ET.getAsOpaquePtr()); 2253 ID.AddInteger(ArraySize.getZExtValue()); 2254 ID.AddInteger(SizeMod); 2255 ID.AddInteger(TypeQuals); 2256 } 2257 static bool classof(const Type *T) { 2258 return T->getTypeClass() == ConstantArray; 2259 } 2260}; 2261 2262/// IncompleteArrayType - This class represents C arrays with an unspecified 2263/// size. For example 'int A[]' has an IncompleteArrayType where the element 2264/// type is 'int' and the size is unspecified. 2265class IncompleteArrayType : public ArrayType { 2266 2267 IncompleteArrayType(QualType et, QualType can, 2268 ArraySizeModifier sm, unsigned tq) 2269 : ArrayType(IncompleteArray, et, can, sm, tq, 2270 et->containsUnexpandedParameterPack()) {} 2271 friend class ASTContext; // ASTContext creates these. 2272public: 2273 bool isSugared() const { return false; } 2274 QualType desugar() const { return QualType(this, 0); } 2275 2276 static bool classof(const Type *T) { 2277 return T->getTypeClass() == IncompleteArray; 2278 } 2279 2280 friend class StmtIteratorBase; 2281 2282 void Profile(llvm::FoldingSetNodeID &ID) { 2283 Profile(ID, getElementType(), getSizeModifier(), 2284 getIndexTypeCVRQualifiers()); 2285 } 2286 2287 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 2288 ArraySizeModifier SizeMod, unsigned TypeQuals) { 2289 ID.AddPointer(ET.getAsOpaquePtr()); 2290 ID.AddInteger(SizeMod); 2291 ID.AddInteger(TypeQuals); 2292 } 2293}; 2294 2295/// VariableArrayType - This class represents C arrays with a specified size 2296/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 2297/// Since the size expression is an arbitrary expression, we store it as such. 2298/// 2299/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 2300/// should not be: two lexically equivalent variable array types could mean 2301/// different things, for example, these variables do not have the same type 2302/// dynamically: 2303/// 2304/// void foo(int x) { 2305/// int Y[x]; 2306/// ++x; 2307/// int Z[x]; 2308/// } 2309/// 2310class VariableArrayType : public ArrayType { 2311 /// SizeExpr - An assignment expression. VLA's are only permitted within 2312 /// a function block. 2313 Stmt *SizeExpr; 2314 /// Brackets - The left and right array brackets. 2315 SourceRange Brackets; 2316 2317 VariableArrayType(QualType et, QualType can, Expr *e, 2318 ArraySizeModifier sm, unsigned tq, 2319 SourceRange brackets) 2320 : ArrayType(VariableArray, et, can, sm, tq, 2321 et->containsUnexpandedParameterPack()), 2322 SizeExpr((Stmt*) e), Brackets(brackets) {} 2323 friend class ASTContext; // ASTContext creates these. 2324 2325public: 2326 Expr *getSizeExpr() const { 2327 // We use C-style casts instead of cast<> here because we do not wish 2328 // to have a dependency of Type.h on Stmt.h/Expr.h. 2329 return (Expr*) SizeExpr; 2330 } 2331 SourceRange getBracketsRange() const { return Brackets; } 2332 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 2333 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 2334 2335 bool isSugared() const { return false; } 2336 QualType desugar() const { return QualType(this, 0); } 2337 2338 static bool classof(const Type *T) { 2339 return T->getTypeClass() == VariableArray; 2340 } 2341 2342 friend class StmtIteratorBase; 2343 2344 void Profile(llvm::FoldingSetNodeID &ID) { 2345 llvm_unreachable("Cannot unique VariableArrayTypes."); 2346 } 2347}; 2348 2349/// DependentSizedArrayType - This type represents an array type in 2350/// C++ whose size is a value-dependent expression. For example: 2351/// 2352/// \code 2353/// template<typename T, int Size> 2354/// class array { 2355/// T data[Size]; 2356/// }; 2357/// \endcode 2358/// 2359/// For these types, we won't actually know what the array bound is 2360/// until template instantiation occurs, at which point this will 2361/// become either a ConstantArrayType or a VariableArrayType. 2362class DependentSizedArrayType : public ArrayType { 2363 const ASTContext &Context; 2364 2365 /// \brief An assignment expression that will instantiate to the 2366 /// size of the array. 2367 /// 2368 /// The expression itself might be NULL, in which case the array 2369 /// type will have its size deduced from an initializer. 2370 Stmt *SizeExpr; 2371 2372 /// Brackets - The left and right array brackets. 2373 SourceRange Brackets; 2374 2375 DependentSizedArrayType(const ASTContext &Context, QualType et, QualType can, 2376 Expr *e, ArraySizeModifier sm, unsigned tq, 2377 SourceRange brackets); 2378 2379 friend class ASTContext; // ASTContext creates these. 2380 2381public: 2382 Expr *getSizeExpr() const { 2383 // We use C-style casts instead of cast<> here because we do not wish 2384 // to have a dependency of Type.h on Stmt.h/Expr.h. 2385 return (Expr*) SizeExpr; 2386 } 2387 SourceRange getBracketsRange() const { return Brackets; } 2388 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 2389 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 2390 2391 bool isSugared() const { return false; } 2392 QualType desugar() const { return QualType(this, 0); } 2393 2394 static bool classof(const Type *T) { 2395 return T->getTypeClass() == DependentSizedArray; 2396 } 2397 2398 friend class StmtIteratorBase; 2399 2400 2401 void Profile(llvm::FoldingSetNodeID &ID) { 2402 Profile(ID, Context, getElementType(), 2403 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 2404 } 2405 2406 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2407 QualType ET, ArraySizeModifier SizeMod, 2408 unsigned TypeQuals, Expr *E); 2409}; 2410 2411/// DependentSizedExtVectorType - This type represent an extended vector type 2412/// where either the type or size is dependent. For example: 2413/// @code 2414/// template<typename T, int Size> 2415/// class vector { 2416/// typedef T __attribute__((ext_vector_type(Size))) type; 2417/// } 2418/// @endcode 2419class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 2420 const ASTContext &Context; 2421 Expr *SizeExpr; 2422 /// ElementType - The element type of the array. 2423 QualType ElementType; 2424 SourceLocation loc; 2425 2426 DependentSizedExtVectorType(const ASTContext &Context, QualType ElementType, 2427 QualType can, Expr *SizeExpr, SourceLocation loc); 2428 2429 friend class ASTContext; 2430 2431public: 2432 Expr *getSizeExpr() const { return SizeExpr; } 2433 QualType getElementType() const { return ElementType; } 2434 SourceLocation getAttributeLoc() const { return loc; } 2435 2436 bool isSugared() const { return false; } 2437 QualType desugar() const { return QualType(this, 0); } 2438 2439 static bool classof(const Type *T) { 2440 return T->getTypeClass() == DependentSizedExtVector; 2441 } 2442 2443 void Profile(llvm::FoldingSetNodeID &ID) { 2444 Profile(ID, Context, getElementType(), getSizeExpr()); 2445 } 2446 2447 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2448 QualType ElementType, Expr *SizeExpr); 2449}; 2450 2451 2452/// VectorType - GCC generic vector type. This type is created using 2453/// __attribute__((vector_size(n)), where "n" specifies the vector size in 2454/// bytes; or from an Altivec __vector or vector declaration. 2455/// Since the constructor takes the number of vector elements, the 2456/// client is responsible for converting the size into the number of elements. 2457class VectorType : public Type, public llvm::FoldingSetNode { 2458public: 2459 enum VectorKind { 2460 GenericVector, // not a target-specific vector type 2461 AltiVecVector, // is AltiVec vector 2462 AltiVecPixel, // is AltiVec 'vector Pixel' 2463 AltiVecBool, // is AltiVec 'vector bool ...' 2464 NeonVector, // is ARM Neon vector 2465 NeonPolyVector // is ARM Neon polynomial vector 2466 }; 2467protected: 2468 /// ElementType - The element type of the vector. 2469 QualType ElementType; 2470 2471 VectorType(QualType vecType, unsigned nElements, QualType canonType, 2472 VectorKind vecKind); 2473 2474 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 2475 QualType canonType, VectorKind vecKind); 2476 2477 friend class ASTContext; // ASTContext creates these. 2478 2479public: 2480 2481 QualType getElementType() const { return ElementType; } 2482 unsigned getNumElements() const { return VectorTypeBits.NumElements; } 2483 2484 bool isSugared() const { return false; } 2485 QualType desugar() const { return QualType(this, 0); } 2486 2487 VectorKind getVectorKind() const { 2488 return VectorKind(VectorTypeBits.VecKind); 2489 } 2490 2491 void Profile(llvm::FoldingSetNodeID &ID) { 2492 Profile(ID, getElementType(), getNumElements(), 2493 getTypeClass(), getVectorKind()); 2494 } 2495 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 2496 unsigned NumElements, TypeClass TypeClass, 2497 VectorKind VecKind) { 2498 ID.AddPointer(ElementType.getAsOpaquePtr()); 2499 ID.AddInteger(NumElements); 2500 ID.AddInteger(TypeClass); 2501 ID.AddInteger(VecKind); 2502 } 2503 2504 static bool classof(const Type *T) { 2505 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 2506 } 2507}; 2508 2509/// ExtVectorType - Extended vector type. This type is created using 2510/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 2511/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 2512/// class enables syntactic extensions, like Vector Components for accessing 2513/// points, colors, and textures (modeled after OpenGL Shading Language). 2514class ExtVectorType : public VectorType { 2515 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 2516 VectorType(ExtVector, vecType, nElements, canonType, GenericVector) {} 2517 friend class ASTContext; // ASTContext creates these. 2518public: 2519 static int getPointAccessorIdx(char c) { 2520 switch (c) { 2521 default: return -1; 2522 case 'x': return 0; 2523 case 'y': return 1; 2524 case 'z': return 2; 2525 case 'w': return 3; 2526 } 2527 } 2528 static int getNumericAccessorIdx(char c) { 2529 switch (c) { 2530 default: return -1; 2531 case '0': return 0; 2532 case '1': return 1; 2533 case '2': return 2; 2534 case '3': return 3; 2535 case '4': return 4; 2536 case '5': return 5; 2537 case '6': return 6; 2538 case '7': return 7; 2539 case '8': return 8; 2540 case '9': return 9; 2541 case 'A': 2542 case 'a': return 10; 2543 case 'B': 2544 case 'b': return 11; 2545 case 'C': 2546 case 'c': return 12; 2547 case 'D': 2548 case 'd': return 13; 2549 case 'E': 2550 case 'e': return 14; 2551 case 'F': 2552 case 'f': return 15; 2553 } 2554 } 2555 2556 static int getAccessorIdx(char c) { 2557 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 2558 return getNumericAccessorIdx(c); 2559 } 2560 2561 bool isAccessorWithinNumElements(char c) const { 2562 if (int idx = getAccessorIdx(c)+1) 2563 return unsigned(idx-1) < getNumElements(); 2564 return false; 2565 } 2566 bool isSugared() const { return false; } 2567 QualType desugar() const { return QualType(this, 0); } 2568 2569 static bool classof(const Type *T) { 2570 return T->getTypeClass() == ExtVector; 2571 } 2572}; 2573 2574/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 2575/// class of FunctionNoProtoType and FunctionProtoType. 2576/// 2577class FunctionType : public Type { 2578 // The type returned by the function. 2579 QualType ResultType; 2580 2581 public: 2582 /// ExtInfo - A class which abstracts out some details necessary for 2583 /// making a call. 2584 /// 2585 /// It is not actually used directly for storing this information in 2586 /// a FunctionType, although FunctionType does currently use the 2587 /// same bit-pattern. 2588 /// 2589 // If you add a field (say Foo), other than the obvious places (both, 2590 // constructors, compile failures), what you need to update is 2591 // * Operator== 2592 // * getFoo 2593 // * withFoo 2594 // * functionType. Add Foo, getFoo. 2595 // * ASTContext::getFooType 2596 // * ASTContext::mergeFunctionTypes 2597 // * FunctionNoProtoType::Profile 2598 // * FunctionProtoType::Profile 2599 // * TypePrinter::PrintFunctionProto 2600 // * AST read and write 2601 // * Codegen 2602 class ExtInfo { 2603 // Feel free to rearrange or add bits, but if you go over 9, 2604 // you'll need to adjust both the Bits field below and 2605 // Type::FunctionTypeBitfields. 2606 2607 // | CC |noreturn|produces|regparm| 2608 // |0 .. 3| 4 | 5 | 6 .. 8| 2609 // 2610 // regparm is either 0 (no regparm attribute) or the regparm value+1. 2611 enum { CallConvMask = 0xF }; 2612 enum { NoReturnMask = 0x10 }; 2613 enum { ProducesResultMask = 0x20 }; 2614 enum { RegParmMask = ~(CallConvMask | NoReturnMask | ProducesResultMask), 2615 RegParmOffset = 6 }; // Assumed to be the last field 2616 2617 uint16_t Bits; 2618 2619 ExtInfo(unsigned Bits) : Bits(static_cast<uint16_t>(Bits)) {} 2620 2621 friend class FunctionType; 2622 2623 public: 2624 // Constructor with no defaults. Use this when you know that you 2625 // have all the elements (when reading an AST file for example). 2626 ExtInfo(bool noReturn, bool hasRegParm, unsigned regParm, CallingConv cc, 2627 bool producesResult) { 2628 assert((!hasRegParm || regParm < 7) && "Invalid regparm value"); 2629 Bits = ((unsigned) cc) | 2630 (noReturn ? NoReturnMask : 0) | 2631 (producesResult ? ProducesResultMask : 0) | 2632 (hasRegParm ? ((regParm + 1) << RegParmOffset) : 0); 2633 } 2634 2635 // Constructor with all defaults. Use when for example creating a 2636 // function know to use defaults. 2637 ExtInfo() : Bits(0) {} 2638 2639 bool getNoReturn() const { return Bits & NoReturnMask; } 2640 bool getProducesResult() const { return Bits & ProducesResultMask; } 2641 bool getHasRegParm() const { return (Bits >> RegParmOffset) != 0; } 2642 unsigned getRegParm() const { 2643 unsigned RegParm = Bits >> RegParmOffset; 2644 if (RegParm > 0) 2645 --RegParm; 2646 return RegParm; 2647 } 2648 CallingConv getCC() const { return CallingConv(Bits & CallConvMask); } 2649 2650 bool operator==(ExtInfo Other) const { 2651 return Bits == Other.Bits; 2652 } 2653 bool operator!=(ExtInfo Other) const { 2654 return Bits != Other.Bits; 2655 } 2656 2657 // Note that we don't have setters. That is by design, use 2658 // the following with methods instead of mutating these objects. 2659 2660 ExtInfo withNoReturn(bool noReturn) const { 2661 if (noReturn) 2662 return ExtInfo(Bits | NoReturnMask); 2663 else 2664 return ExtInfo(Bits & ~NoReturnMask); 2665 } 2666 2667 ExtInfo withProducesResult(bool producesResult) const { 2668 if (producesResult) 2669 return ExtInfo(Bits | ProducesResultMask); 2670 else 2671 return ExtInfo(Bits & ~ProducesResultMask); 2672 } 2673 2674 ExtInfo withRegParm(unsigned RegParm) const { 2675 assert(RegParm < 7 && "Invalid regparm value"); 2676 return ExtInfo((Bits & ~RegParmMask) | 2677 ((RegParm + 1) << RegParmOffset)); 2678 } 2679 2680 ExtInfo withCallingConv(CallingConv cc) const { 2681 return ExtInfo((Bits & ~CallConvMask) | (unsigned) cc); 2682 } 2683 2684 void Profile(llvm::FoldingSetNodeID &ID) const { 2685 ID.AddInteger(Bits); 2686 } 2687 }; 2688 2689protected: 2690 FunctionType(TypeClass tc, QualType res, 2691 unsigned typeQuals, QualType Canonical, bool Dependent, 2692 bool InstantiationDependent, 2693 bool VariablyModified, bool ContainsUnexpandedParameterPack, 2694 ExtInfo Info) 2695 : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified, 2696 ContainsUnexpandedParameterPack), 2697 ResultType(res) { 2698 FunctionTypeBits.ExtInfo = Info.Bits; 2699 FunctionTypeBits.TypeQuals = typeQuals; 2700 } 2701 unsigned getTypeQuals() const { return FunctionTypeBits.TypeQuals; } 2702 2703public: 2704 2705 QualType getResultType() const { return ResultType; } 2706 2707 bool getHasRegParm() const { return getExtInfo().getHasRegParm(); } 2708 unsigned getRegParmType() const { return getExtInfo().getRegParm(); } 2709 bool getNoReturnAttr() const { return getExtInfo().getNoReturn(); } 2710 CallingConv getCallConv() const { return getExtInfo().getCC(); } 2711 ExtInfo getExtInfo() const { return ExtInfo(FunctionTypeBits.ExtInfo); } 2712 bool isConst() const { return getTypeQuals() & Qualifiers::Const; } 2713 bool isVolatile() const { return getTypeQuals() & Qualifiers::Volatile; } 2714 bool isRestrict() const { return getTypeQuals() & Qualifiers::Restrict; } 2715 2716 /// \brief Determine the type of an expression that calls a function of 2717 /// this type. 2718 QualType getCallResultType(ASTContext &Context) const { 2719 return getResultType().getNonLValueExprType(Context); 2720 } 2721 2722 static StringRef getNameForCallConv(CallingConv CC); 2723 2724 static bool classof(const Type *T) { 2725 return T->getTypeClass() == FunctionNoProto || 2726 T->getTypeClass() == FunctionProto; 2727 } 2728}; 2729 2730/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 2731/// no information available about its arguments. 2732class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 2733 FunctionNoProtoType(QualType Result, QualType Canonical, ExtInfo Info) 2734 : FunctionType(FunctionNoProto, Result, 0, Canonical, 2735 /*Dependent=*/false, /*InstantiationDependent=*/false, 2736 Result->isVariablyModifiedType(), 2737 /*ContainsUnexpandedParameterPack=*/false, Info) {} 2738 2739 friend class ASTContext; // ASTContext creates these. 2740 2741public: 2742 // No additional state past what FunctionType provides. 2743 2744 bool isSugared() const { return false; } 2745 QualType desugar() const { return QualType(this, 0); } 2746 2747 void Profile(llvm::FoldingSetNodeID &ID) { 2748 Profile(ID, getResultType(), getExtInfo()); 2749 } 2750 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 2751 ExtInfo Info) { 2752 Info.Profile(ID); 2753 ID.AddPointer(ResultType.getAsOpaquePtr()); 2754 } 2755 2756 static bool classof(const Type *T) { 2757 return T->getTypeClass() == FunctionNoProto; 2758 } 2759}; 2760 2761/// FunctionProtoType - Represents a prototype with argument type info, e.g. 2762/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 2763/// arguments, not as having a single void argument. Such a type can have an 2764/// exception specification, but this specification is not part of the canonical 2765/// type. 2766class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 2767public: 2768 /// ExtProtoInfo - Extra information about a function prototype. 2769 struct ExtProtoInfo { 2770 ExtProtoInfo() : 2771 Variadic(false), HasTrailingReturn(false), TypeQuals(0), 2772 ExceptionSpecType(EST_None), RefQualifier(RQ_None), 2773 NumExceptions(0), Exceptions(0), NoexceptExpr(0), 2774 ExceptionSpecDecl(0), ExceptionSpecTemplate(0), 2775 ConsumedArguments(0) {} 2776 2777 FunctionType::ExtInfo ExtInfo; 2778 bool Variadic : 1; 2779 bool HasTrailingReturn : 1; 2780 unsigned char TypeQuals; 2781 ExceptionSpecificationType ExceptionSpecType; 2782 RefQualifierKind RefQualifier; 2783 unsigned NumExceptions; 2784 const QualType *Exceptions; 2785 Expr *NoexceptExpr; 2786 FunctionDecl *ExceptionSpecDecl; 2787 FunctionDecl *ExceptionSpecTemplate; 2788 const bool *ConsumedArguments; 2789 }; 2790 2791private: 2792 /// \brief Determine whether there are any argument types that 2793 /// contain an unexpanded parameter pack. 2794 static bool containsAnyUnexpandedParameterPack(const QualType *ArgArray, 2795 unsigned numArgs) { 2796 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 2797 if (ArgArray[Idx]->containsUnexpandedParameterPack()) 2798 return true; 2799 2800 return false; 2801 } 2802 2803 FunctionProtoType(QualType result, const QualType *args, unsigned numArgs, 2804 QualType canonical, const ExtProtoInfo &epi); 2805 2806 /// NumArgs - The number of arguments this function has, not counting '...'. 2807 unsigned NumArgs : 15; 2808 2809 /// NumExceptions - The number of types in the exception spec, if any. 2810 unsigned NumExceptions : 9; 2811 2812 /// ExceptionSpecType - The type of exception specification this function has. 2813 unsigned ExceptionSpecType : 3; 2814 2815 /// HasAnyConsumedArgs - Whether this function has any consumed arguments. 2816 unsigned HasAnyConsumedArgs : 1; 2817 2818 /// Variadic - Whether the function is variadic. 2819 unsigned Variadic : 1; 2820 2821 /// HasTrailingReturn - Whether this function has a trailing return type. 2822 unsigned HasTrailingReturn : 1; 2823 2824 /// \brief The ref-qualifier associated with a \c FunctionProtoType. 2825 /// 2826 /// This is a value of type \c RefQualifierKind. 2827 unsigned RefQualifier : 2; 2828 2829 // ArgInfo - There is an variable size array after the class in memory that 2830 // holds the argument types. 2831 2832 // Exceptions - There is another variable size array after ArgInfo that 2833 // holds the exception types. 2834 2835 // NoexceptExpr - Instead of Exceptions, there may be a single Expr* pointing 2836 // to the expression in the noexcept() specifier. 2837 2838 // ExceptionSpecDecl, ExceptionSpecTemplate - Instead of Exceptions, there may 2839 // be a pair of FunctionDecl* pointing to the function which should be used to 2840 // instantiate this function type's exception specification, and the function 2841 // from which it should be instantiated. 2842 2843 // ConsumedArgs - A variable size array, following Exceptions 2844 // and of length NumArgs, holding flags indicating which arguments 2845 // are consumed. This only appears if HasAnyConsumedArgs is true. 2846 2847 friend class ASTContext; // ASTContext creates these. 2848 2849 const bool *getConsumedArgsBuffer() const { 2850 assert(hasAnyConsumedArgs()); 2851 2852 // Find the end of the exceptions. 2853 Expr * const *eh_end = reinterpret_cast<Expr * const *>(arg_type_end()); 2854 if (getExceptionSpecType() != EST_ComputedNoexcept) 2855 eh_end += NumExceptions; 2856 else 2857 eh_end += 1; // NoexceptExpr 2858 2859 return reinterpret_cast<const bool*>(eh_end); 2860 } 2861 2862public: 2863 unsigned getNumArgs() const { return NumArgs; } 2864 QualType getArgType(unsigned i) const { 2865 assert(i < NumArgs && "Invalid argument number!"); 2866 return arg_type_begin()[i]; 2867 } 2868 2869 ExtProtoInfo getExtProtoInfo() const { 2870 ExtProtoInfo EPI; 2871 EPI.ExtInfo = getExtInfo(); 2872 EPI.Variadic = isVariadic(); 2873 EPI.HasTrailingReturn = hasTrailingReturn(); 2874 EPI.ExceptionSpecType = getExceptionSpecType(); 2875 EPI.TypeQuals = static_cast<unsigned char>(getTypeQuals()); 2876 EPI.RefQualifier = getRefQualifier(); 2877 if (EPI.ExceptionSpecType == EST_Dynamic) { 2878 EPI.NumExceptions = NumExceptions; 2879 EPI.Exceptions = exception_begin(); 2880 } else if (EPI.ExceptionSpecType == EST_ComputedNoexcept) { 2881 EPI.NoexceptExpr = getNoexceptExpr(); 2882 } else if (EPI.ExceptionSpecType == EST_Uninstantiated) { 2883 EPI.ExceptionSpecDecl = getExceptionSpecDecl(); 2884 EPI.ExceptionSpecTemplate = getExceptionSpecTemplate(); 2885 } else if (EPI.ExceptionSpecType == EST_Unevaluated) { 2886 EPI.ExceptionSpecDecl = getExceptionSpecDecl(); 2887 } 2888 if (hasAnyConsumedArgs()) 2889 EPI.ConsumedArguments = getConsumedArgsBuffer(); 2890 return EPI; 2891 } 2892 2893 /// \brief Get the kind of exception specification on this function. 2894 ExceptionSpecificationType getExceptionSpecType() const { 2895 return static_cast<ExceptionSpecificationType>(ExceptionSpecType); 2896 } 2897 /// \brief Return whether this function has any kind of exception spec. 2898 bool hasExceptionSpec() const { 2899 return getExceptionSpecType() != EST_None; 2900 } 2901 /// \brief Return whether this function has a dynamic (throw) exception spec. 2902 bool hasDynamicExceptionSpec() const { 2903 return isDynamicExceptionSpec(getExceptionSpecType()); 2904 } 2905 /// \brief Return whether this function has a noexcept exception spec. 2906 bool hasNoexceptExceptionSpec() const { 2907 return isNoexceptExceptionSpec(getExceptionSpecType()); 2908 } 2909 /// \brief Result type of getNoexceptSpec(). 2910 enum NoexceptResult { 2911 NR_NoNoexcept, ///< There is no noexcept specifier. 2912 NR_BadNoexcept, ///< The noexcept specifier has a bad expression. 2913 NR_Dependent, ///< The noexcept specifier is dependent. 2914 NR_Throw, ///< The noexcept specifier evaluates to false. 2915 NR_Nothrow ///< The noexcept specifier evaluates to true. 2916 }; 2917 /// \brief Get the meaning of the noexcept spec on this function, if any. 2918 NoexceptResult getNoexceptSpec(ASTContext &Ctx) const; 2919 unsigned getNumExceptions() const { return NumExceptions; } 2920 QualType getExceptionType(unsigned i) const { 2921 assert(i < NumExceptions && "Invalid exception number!"); 2922 return exception_begin()[i]; 2923 } 2924 Expr *getNoexceptExpr() const { 2925 if (getExceptionSpecType() != EST_ComputedNoexcept) 2926 return 0; 2927 // NoexceptExpr sits where the arguments end. 2928 return *reinterpret_cast<Expr *const *>(arg_type_end()); 2929 } 2930 /// \brief If this function type has an exception specification which hasn't 2931 /// been determined yet (either because it has not been evaluated or because 2932 /// it has not been instantiated), this is the function whose exception 2933 /// specification is represented by this type. 2934 FunctionDecl *getExceptionSpecDecl() const { 2935 if (getExceptionSpecType() != EST_Uninstantiated && 2936 getExceptionSpecType() != EST_Unevaluated) 2937 return 0; 2938 return reinterpret_cast<FunctionDecl * const *>(arg_type_end())[0]; 2939 } 2940 /// \brief If this function type has an uninstantiated exception 2941 /// specification, this is the function whose exception specification 2942 /// should be instantiated to find the exception specification for 2943 /// this type. 2944 FunctionDecl *getExceptionSpecTemplate() const { 2945 if (getExceptionSpecType() != EST_Uninstantiated) 2946 return 0; 2947 return reinterpret_cast<FunctionDecl * const *>(arg_type_end())[1]; 2948 } 2949 bool isNothrow(ASTContext &Ctx) const { 2950 ExceptionSpecificationType EST = getExceptionSpecType(); 2951 assert(EST != EST_Unevaluated && EST != EST_Uninstantiated); 2952 if (EST == EST_DynamicNone || EST == EST_BasicNoexcept) 2953 return true; 2954 if (EST != EST_ComputedNoexcept) 2955 return false; 2956 return getNoexceptSpec(Ctx) == NR_Nothrow; 2957 } 2958 2959 bool isVariadic() const { return Variadic; } 2960 2961 /// \brief Determines whether this function prototype contains a 2962 /// parameter pack at the end. 2963 /// 2964 /// A function template whose last parameter is a parameter pack can be 2965 /// called with an arbitrary number of arguments, much like a variadic 2966 /// function. 2967 bool isTemplateVariadic() const; 2968 2969 bool hasTrailingReturn() const { return HasTrailingReturn; } 2970 2971 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 2972 2973 2974 /// \brief Retrieve the ref-qualifier associated with this function type. 2975 RefQualifierKind getRefQualifier() const { 2976 return static_cast<RefQualifierKind>(RefQualifier); 2977 } 2978 2979 typedef const QualType *arg_type_iterator; 2980 arg_type_iterator arg_type_begin() const { 2981 return reinterpret_cast<const QualType *>(this+1); 2982 } 2983 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 2984 2985 typedef const QualType *exception_iterator; 2986 exception_iterator exception_begin() const { 2987 // exceptions begin where arguments end 2988 return arg_type_end(); 2989 } 2990 exception_iterator exception_end() const { 2991 if (getExceptionSpecType() != EST_Dynamic) 2992 return exception_begin(); 2993 return exception_begin() + NumExceptions; 2994 } 2995 2996 bool hasAnyConsumedArgs() const { 2997 return HasAnyConsumedArgs; 2998 } 2999 bool isArgConsumed(unsigned I) const { 3000 assert(I < getNumArgs() && "argument index out of range!"); 3001 if (hasAnyConsumedArgs()) 3002 return getConsumedArgsBuffer()[I]; 3003 return false; 3004 } 3005 3006 bool isSugared() const { return false; } 3007 QualType desugar() const { return QualType(this, 0); } 3008 3009 // FIXME: Remove the string version. 3010 void printExceptionSpecification(std::string &S, 3011 const PrintingPolicy &Policy) const; 3012 void printExceptionSpecification(raw_ostream &OS, 3013 const PrintingPolicy &Policy) const; 3014 3015 static bool classof(const Type *T) { 3016 return T->getTypeClass() == FunctionProto; 3017 } 3018 3019 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx); 3020 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 3021 arg_type_iterator ArgTys, unsigned NumArgs, 3022 const ExtProtoInfo &EPI, const ASTContext &Context); 3023}; 3024 3025 3026/// \brief Represents the dependent type named by a dependently-scoped 3027/// typename using declaration, e.g. 3028/// using typename Base<T>::foo; 3029/// Template instantiation turns these into the underlying type. 3030class UnresolvedUsingType : public Type { 3031 UnresolvedUsingTypenameDecl *Decl; 3032 3033 UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) 3034 : Type(UnresolvedUsing, QualType(), true, true, false, 3035 /*ContainsUnexpandedParameterPack=*/false), 3036 Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} 3037 friend class ASTContext; // ASTContext creates these. 3038public: 3039 3040 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 3041 3042 bool isSugared() const { return false; } 3043 QualType desugar() const { return QualType(this, 0); } 3044 3045 static bool classof(const Type *T) { 3046 return T->getTypeClass() == UnresolvedUsing; 3047 } 3048 3049 void Profile(llvm::FoldingSetNodeID &ID) { 3050 return Profile(ID, Decl); 3051 } 3052 static void Profile(llvm::FoldingSetNodeID &ID, 3053 UnresolvedUsingTypenameDecl *D) { 3054 ID.AddPointer(D); 3055 } 3056}; 3057 3058 3059class TypedefType : public Type { 3060 TypedefNameDecl *Decl; 3061protected: 3062 TypedefType(TypeClass tc, const TypedefNameDecl *D, QualType can) 3063 : Type(tc, can, can->isDependentType(), 3064 can->isInstantiationDependentType(), 3065 can->isVariablyModifiedType(), 3066 /*ContainsUnexpandedParameterPack=*/false), 3067 Decl(const_cast<TypedefNameDecl*>(D)) { 3068 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 3069 } 3070 friend class ASTContext; // ASTContext creates these. 3071public: 3072 3073 TypedefNameDecl *getDecl() const { return Decl; } 3074 3075 bool isSugared() const { return true; } 3076 QualType desugar() const; 3077 3078 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 3079}; 3080 3081/// TypeOfExprType (GCC extension). 3082class TypeOfExprType : public Type { 3083 Expr *TOExpr; 3084 3085protected: 3086 TypeOfExprType(Expr *E, QualType can = QualType()); 3087 friend class ASTContext; // ASTContext creates these. 3088public: 3089 Expr *getUnderlyingExpr() const { return TOExpr; } 3090 3091 /// \brief Remove a single level of sugar. 3092 QualType desugar() const; 3093 3094 /// \brief Returns whether this type directly provides sugar. 3095 bool isSugared() const; 3096 3097 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 3098}; 3099 3100/// \brief Internal representation of canonical, dependent 3101/// typeof(expr) types. 3102/// 3103/// This class is used internally by the ASTContext to manage 3104/// canonical, dependent types, only. Clients will only see instances 3105/// of this class via TypeOfExprType nodes. 3106class DependentTypeOfExprType 3107 : public TypeOfExprType, public llvm::FoldingSetNode { 3108 const ASTContext &Context; 3109 3110public: 3111 DependentTypeOfExprType(const ASTContext &Context, Expr *E) 3112 : TypeOfExprType(E), Context(Context) { } 3113 3114 void Profile(llvm::FoldingSetNodeID &ID) { 3115 Profile(ID, Context, getUnderlyingExpr()); 3116 } 3117 3118 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 3119 Expr *E); 3120}; 3121 3122/// TypeOfType (GCC extension). 3123class TypeOfType : public Type { 3124 QualType TOType; 3125 TypeOfType(QualType T, QualType can) 3126 : Type(TypeOf, can, T->isDependentType(), 3127 T->isInstantiationDependentType(), 3128 T->isVariablyModifiedType(), 3129 T->containsUnexpandedParameterPack()), 3130 TOType(T) { 3131 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 3132 } 3133 friend class ASTContext; // ASTContext creates these. 3134public: 3135 QualType getUnderlyingType() const { return TOType; } 3136 3137 /// \brief Remove a single level of sugar. 3138 QualType desugar() const { return getUnderlyingType(); } 3139 3140 /// \brief Returns whether this type directly provides sugar. 3141 bool isSugared() const { return true; } 3142 3143 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 3144}; 3145 3146/// DecltypeType (C++0x) 3147class DecltypeType : public Type { 3148 Expr *E; 3149 QualType UnderlyingType; 3150 3151protected: 3152 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 3153 friend class ASTContext; // ASTContext creates these. 3154public: 3155 Expr *getUnderlyingExpr() const { return E; } 3156 QualType getUnderlyingType() const { return UnderlyingType; } 3157 3158 /// \brief Remove a single level of sugar. 3159 QualType desugar() const; 3160 3161 /// \brief Returns whether this type directly provides sugar. 3162 bool isSugared() const; 3163 3164 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 3165}; 3166 3167/// \brief Internal representation of canonical, dependent 3168/// decltype(expr) types. 3169/// 3170/// This class is used internally by the ASTContext to manage 3171/// canonical, dependent types, only. Clients will only see instances 3172/// of this class via DecltypeType nodes. 3173class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 3174 const ASTContext &Context; 3175 3176public: 3177 DependentDecltypeType(const ASTContext &Context, Expr *E); 3178 3179 void Profile(llvm::FoldingSetNodeID &ID) { 3180 Profile(ID, Context, getUnderlyingExpr()); 3181 } 3182 3183 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 3184 Expr *E); 3185}; 3186 3187/// \brief A unary type transform, which is a type constructed from another 3188class UnaryTransformType : public Type { 3189public: 3190 enum UTTKind { 3191 EnumUnderlyingType 3192 }; 3193 3194private: 3195 /// The untransformed type. 3196 QualType BaseType; 3197 /// The transformed type if not dependent, otherwise the same as BaseType. 3198 QualType UnderlyingType; 3199 3200 UTTKind UKind; 3201protected: 3202 UnaryTransformType(QualType BaseTy, QualType UnderlyingTy, UTTKind UKind, 3203 QualType CanonicalTy); 3204 friend class ASTContext; 3205public: 3206 bool isSugared() const { return !isDependentType(); } 3207 QualType desugar() const { return UnderlyingType; } 3208 3209 QualType getUnderlyingType() const { return UnderlyingType; } 3210 QualType getBaseType() const { return BaseType; } 3211 3212 UTTKind getUTTKind() const { return UKind; } 3213 3214 static bool classof(const Type *T) { 3215 return T->getTypeClass() == UnaryTransform; 3216 } 3217}; 3218 3219class TagType : public Type { 3220 /// Stores the TagDecl associated with this type. The decl may point to any 3221 /// TagDecl that declares the entity. 3222 TagDecl * decl; 3223 3224 friend class ASTReader; 3225 3226protected: 3227 TagType(TypeClass TC, const TagDecl *D, QualType can); 3228 3229public: 3230 TagDecl *getDecl() const; 3231 3232 /// @brief Determines whether this type is in the process of being 3233 /// defined. 3234 bool isBeingDefined() const; 3235 3236 static bool classof(const Type *T) { 3237 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 3238 } 3239}; 3240 3241/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 3242/// to detect TagType objects of structs/unions/classes. 3243class RecordType : public TagType { 3244protected: 3245 explicit RecordType(const RecordDecl *D) 3246 : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3247 explicit RecordType(TypeClass TC, RecordDecl *D) 3248 : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3249 friend class ASTContext; // ASTContext creates these. 3250public: 3251 3252 RecordDecl *getDecl() const { 3253 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 3254 } 3255 3256 // FIXME: This predicate is a helper to QualType/Type. It needs to 3257 // recursively check all fields for const-ness. If any field is declared 3258 // const, it needs to return false. 3259 bool hasConstFields() const { return false; } 3260 3261 bool isSugared() const { return false; } 3262 QualType desugar() const { return QualType(this, 0); } 3263 3264 static bool classof(const Type *T) { return T->getTypeClass() == Record; } 3265}; 3266 3267/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 3268/// to detect TagType objects of enums. 3269class EnumType : public TagType { 3270 explicit EnumType(const EnumDecl *D) 3271 : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3272 friend class ASTContext; // ASTContext creates these. 3273public: 3274 3275 EnumDecl *getDecl() const { 3276 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 3277 } 3278 3279 bool isSugared() const { return false; } 3280 QualType desugar() const { return QualType(this, 0); } 3281 3282 static bool classof(const Type *T) { return T->getTypeClass() == Enum; } 3283}; 3284 3285/// AttributedType - An attributed type is a type to which a type 3286/// attribute has been applied. The "modified type" is the 3287/// fully-sugared type to which the attributed type was applied; 3288/// generally it is not canonically equivalent to the attributed type. 3289/// The "equivalent type" is the minimally-desugared type which the 3290/// type is canonically equivalent to. 3291/// 3292/// For example, in the following attributed type: 3293/// int32_t __attribute__((vector_size(16))) 3294/// - the modified type is the TypedefType for int32_t 3295/// - the equivalent type is VectorType(16, int32_t) 3296/// - the canonical type is VectorType(16, int) 3297class AttributedType : public Type, public llvm::FoldingSetNode { 3298public: 3299 // It is really silly to have yet another attribute-kind enum, but 3300 // clang::attr::Kind doesn't currently cover the pure type attrs. 3301 enum Kind { 3302 // Expression operand. 3303 attr_address_space, 3304 attr_regparm, 3305 attr_vector_size, 3306 attr_neon_vector_type, 3307 attr_neon_polyvector_type, 3308 3309 FirstExprOperandKind = attr_address_space, 3310 LastExprOperandKind = attr_neon_polyvector_type, 3311 3312 // Enumerated operand (string or keyword). 3313 attr_objc_gc, 3314 attr_objc_ownership, 3315 attr_pcs, 3316 3317 FirstEnumOperandKind = attr_objc_gc, 3318 LastEnumOperandKind = attr_pcs, 3319 3320 // No operand. 3321 attr_noreturn, 3322 attr_cdecl, 3323 attr_fastcall, 3324 attr_stdcall, 3325 attr_thiscall, 3326 attr_pascal, 3327 attr_pnaclcall, 3328 attr_inteloclbicc 3329 }; 3330 3331private: 3332 QualType ModifiedType; 3333 QualType EquivalentType; 3334 3335 friend class ASTContext; // creates these 3336 3337 AttributedType(QualType canon, Kind attrKind, 3338 QualType modified, QualType equivalent) 3339 : Type(Attributed, canon, canon->isDependentType(), 3340 canon->isInstantiationDependentType(), 3341 canon->isVariablyModifiedType(), 3342 canon->containsUnexpandedParameterPack()), 3343 ModifiedType(modified), EquivalentType(equivalent) { 3344 AttributedTypeBits.AttrKind = attrKind; 3345 } 3346 3347public: 3348 Kind getAttrKind() const { 3349 return static_cast<Kind>(AttributedTypeBits.AttrKind); 3350 } 3351 3352 QualType getModifiedType() const { return ModifiedType; } 3353 QualType getEquivalentType() const { return EquivalentType; } 3354 3355 bool isSugared() const { return true; } 3356 QualType desugar() const { return getEquivalentType(); } 3357 3358 void Profile(llvm::FoldingSetNodeID &ID) { 3359 Profile(ID, getAttrKind(), ModifiedType, EquivalentType); 3360 } 3361 3362 static void Profile(llvm::FoldingSetNodeID &ID, Kind attrKind, 3363 QualType modified, QualType equivalent) { 3364 ID.AddInteger(attrKind); 3365 ID.AddPointer(modified.getAsOpaquePtr()); 3366 ID.AddPointer(equivalent.getAsOpaquePtr()); 3367 } 3368 3369 static bool classof(const Type *T) { 3370 return T->getTypeClass() == Attributed; 3371 } 3372}; 3373 3374class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 3375 // Helper data collector for canonical types. 3376 struct CanonicalTTPTInfo { 3377 unsigned Depth : 15; 3378 unsigned ParameterPack : 1; 3379 unsigned Index : 16; 3380 }; 3381 3382 union { 3383 // Info for the canonical type. 3384 CanonicalTTPTInfo CanTTPTInfo; 3385 // Info for the non-canonical type. 3386 TemplateTypeParmDecl *TTPDecl; 3387 }; 3388 3389 /// Build a non-canonical type. 3390 TemplateTypeParmType(TemplateTypeParmDecl *TTPDecl, QualType Canon) 3391 : Type(TemplateTypeParm, Canon, /*Dependent=*/true, 3392 /*InstantiationDependent=*/true, 3393 /*VariablyModified=*/false, 3394 Canon->containsUnexpandedParameterPack()), 3395 TTPDecl(TTPDecl) { } 3396 3397 /// Build the canonical type. 3398 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 3399 : Type(TemplateTypeParm, QualType(this, 0), 3400 /*Dependent=*/true, 3401 /*InstantiationDependent=*/true, 3402 /*VariablyModified=*/false, PP) { 3403 CanTTPTInfo.Depth = D; 3404 CanTTPTInfo.Index = I; 3405 CanTTPTInfo.ParameterPack = PP; 3406 } 3407 3408 friend class ASTContext; // ASTContext creates these 3409 3410 const CanonicalTTPTInfo& getCanTTPTInfo() const { 3411 QualType Can = getCanonicalTypeInternal(); 3412 return Can->castAs<TemplateTypeParmType>()->CanTTPTInfo; 3413 } 3414 3415public: 3416 unsigned getDepth() const { return getCanTTPTInfo().Depth; } 3417 unsigned getIndex() const { return getCanTTPTInfo().Index; } 3418 bool isParameterPack() const { return getCanTTPTInfo().ParameterPack; } 3419 3420 TemplateTypeParmDecl *getDecl() const { 3421 return isCanonicalUnqualified() ? 0 : TTPDecl; 3422 } 3423 3424 IdentifierInfo *getIdentifier() const; 3425 3426 bool isSugared() const { return false; } 3427 QualType desugar() const { return QualType(this, 0); } 3428 3429 void Profile(llvm::FoldingSetNodeID &ID) { 3430 Profile(ID, getDepth(), getIndex(), isParameterPack(), getDecl()); 3431 } 3432 3433 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 3434 unsigned Index, bool ParameterPack, 3435 TemplateTypeParmDecl *TTPDecl) { 3436 ID.AddInteger(Depth); 3437 ID.AddInteger(Index); 3438 ID.AddBoolean(ParameterPack); 3439 ID.AddPointer(TTPDecl); 3440 } 3441 3442 static bool classof(const Type *T) { 3443 return T->getTypeClass() == TemplateTypeParm; 3444 } 3445}; 3446 3447/// \brief Represents the result of substituting a type for a template 3448/// type parameter. 3449/// 3450/// Within an instantiated template, all template type parameters have 3451/// been replaced with these. They are used solely to record that a 3452/// type was originally written as a template type parameter; 3453/// therefore they are never canonical. 3454class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 3455 // The original type parameter. 3456 const TemplateTypeParmType *Replaced; 3457 3458 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 3459 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType(), 3460 Canon->isInstantiationDependentType(), 3461 Canon->isVariablyModifiedType(), 3462 Canon->containsUnexpandedParameterPack()), 3463 Replaced(Param) { } 3464 3465 friend class ASTContext; 3466 3467public: 3468 /// Gets the template parameter that was substituted for. 3469 const TemplateTypeParmType *getReplacedParameter() const { 3470 return Replaced; 3471 } 3472 3473 /// Gets the type that was substituted for the template 3474 /// parameter. 3475 QualType getReplacementType() const { 3476 return getCanonicalTypeInternal(); 3477 } 3478 3479 bool isSugared() const { return true; } 3480 QualType desugar() const { return getReplacementType(); } 3481 3482 void Profile(llvm::FoldingSetNodeID &ID) { 3483 Profile(ID, getReplacedParameter(), getReplacementType()); 3484 } 3485 static void Profile(llvm::FoldingSetNodeID &ID, 3486 const TemplateTypeParmType *Replaced, 3487 QualType Replacement) { 3488 ID.AddPointer(Replaced); 3489 ID.AddPointer(Replacement.getAsOpaquePtr()); 3490 } 3491 3492 static bool classof(const Type *T) { 3493 return T->getTypeClass() == SubstTemplateTypeParm; 3494 } 3495}; 3496 3497/// \brief Represents the result of substituting a set of types for a template 3498/// type parameter pack. 3499/// 3500/// When a pack expansion in the source code contains multiple parameter packs 3501/// and those parameter packs correspond to different levels of template 3502/// parameter lists, this type node is used to represent a template type 3503/// parameter pack from an outer level, which has already had its argument pack 3504/// substituted but that still lives within a pack expansion that itself 3505/// could not be instantiated. When actually performing a substitution into 3506/// that pack expansion (e.g., when all template parameters have corresponding 3507/// arguments), this type will be replaced with the \c SubstTemplateTypeParmType 3508/// at the current pack substitution index. 3509class SubstTemplateTypeParmPackType : public Type, public llvm::FoldingSetNode { 3510 /// \brief The original type parameter. 3511 const TemplateTypeParmType *Replaced; 3512 3513 /// \brief A pointer to the set of template arguments that this 3514 /// parameter pack is instantiated with. 3515 const TemplateArgument *Arguments; 3516 3517 /// \brief The number of template arguments in \c Arguments. 3518 unsigned NumArguments; 3519 3520 SubstTemplateTypeParmPackType(const TemplateTypeParmType *Param, 3521 QualType Canon, 3522 const TemplateArgument &ArgPack); 3523 3524 friend class ASTContext; 3525 3526public: 3527 IdentifierInfo *getIdentifier() const { return Replaced->getIdentifier(); } 3528 3529 /// Gets the template parameter that was substituted for. 3530 const TemplateTypeParmType *getReplacedParameter() const { 3531 return Replaced; 3532 } 3533 3534 bool isSugared() const { return false; } 3535 QualType desugar() const { return QualType(this, 0); } 3536 3537 TemplateArgument getArgumentPack() const; 3538 3539 void Profile(llvm::FoldingSetNodeID &ID); 3540 static void Profile(llvm::FoldingSetNodeID &ID, 3541 const TemplateTypeParmType *Replaced, 3542 const TemplateArgument &ArgPack); 3543 3544 static bool classof(const Type *T) { 3545 return T->getTypeClass() == SubstTemplateTypeParmPack; 3546 } 3547}; 3548 3549/// \brief Represents a C++0x auto type. 3550/// 3551/// These types are usually a placeholder for a deduced type. However, within 3552/// templates and before the initializer is attached, there is no deduced type 3553/// and an auto type is type-dependent and canonical. 3554class AutoType : public Type, public llvm::FoldingSetNode { 3555 AutoType(QualType DeducedType) 3556 : Type(Auto, DeducedType.isNull() ? QualType(this, 0) : DeducedType, 3557 /*Dependent=*/DeducedType.isNull(), 3558 /*InstantiationDependent=*/DeducedType.isNull(), 3559 /*VariablyModified=*/false, /*ContainsParameterPack=*/false) { 3560 assert((DeducedType.isNull() || !DeducedType->isDependentType()) && 3561 "deduced a dependent type for auto"); 3562 } 3563 3564 friend class ASTContext; // ASTContext creates these 3565 3566public: 3567 bool isSugared() const { return isDeduced(); } 3568 QualType desugar() const { return getCanonicalTypeInternal(); } 3569 3570 QualType getDeducedType() const { 3571 return isDeduced() ? getCanonicalTypeInternal() : QualType(); 3572 } 3573 bool isDeduced() const { 3574 return !isDependentType(); 3575 } 3576 3577 void Profile(llvm::FoldingSetNodeID &ID) { 3578 Profile(ID, getDeducedType()); 3579 } 3580 3581 static void Profile(llvm::FoldingSetNodeID &ID, 3582 QualType Deduced) { 3583 ID.AddPointer(Deduced.getAsOpaquePtr()); 3584 } 3585 3586 static bool classof(const Type *T) { 3587 return T->getTypeClass() == Auto; 3588 } 3589}; 3590 3591/// \brief Represents a type template specialization; the template 3592/// must be a class template, a type alias template, or a template 3593/// template parameter. A template which cannot be resolved to one of 3594/// these, e.g. because it is written with a dependent scope 3595/// specifier, is instead represented as a 3596/// @c DependentTemplateSpecializationType. 3597/// 3598/// A non-dependent template specialization type is always "sugar", 3599/// typically for a @c RecordType. For example, a class template 3600/// specialization type of @c vector<int> will refer to a tag type for 3601/// the instantiation @c std::vector<int, std::allocator<int>> 3602/// 3603/// Template specializations are dependent if either the template or 3604/// any of the template arguments are dependent, in which case the 3605/// type may also be canonical. 3606/// 3607/// Instances of this type are allocated with a trailing array of 3608/// TemplateArguments, followed by a QualType representing the 3609/// non-canonical aliased type when the template is a type alias 3610/// template. 3611class TemplateSpecializationType 3612 : public Type, public llvm::FoldingSetNode { 3613 /// \brief The name of the template being specialized. This is 3614 /// either a TemplateName::Template (in which case it is a 3615 /// ClassTemplateDecl*, a TemplateTemplateParmDecl*, or a 3616 /// TypeAliasTemplateDecl*), a 3617 /// TemplateName::SubstTemplateTemplateParmPack, or a 3618 /// TemplateName::SubstTemplateTemplateParm (in which case the 3619 /// replacement must, recursively, be one of these). 3620 TemplateName Template; 3621 3622 /// \brief - The number of template arguments named in this class 3623 /// template specialization. 3624 unsigned NumArgs : 31; 3625 3626 /// \brief Whether this template specialization type is a substituted 3627 /// type alias. 3628 bool TypeAlias : 1; 3629 3630 TemplateSpecializationType(TemplateName T, 3631 const TemplateArgument *Args, 3632 unsigned NumArgs, QualType Canon, 3633 QualType Aliased); 3634 3635 friend class ASTContext; // ASTContext creates these 3636 3637public: 3638 /// \brief Determine whether any of the given template arguments are 3639 /// dependent. 3640 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 3641 unsigned NumArgs, 3642 bool &InstantiationDependent); 3643 3644 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 3645 unsigned NumArgs, 3646 bool &InstantiationDependent); 3647 3648 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &, 3649 bool &InstantiationDependent); 3650 3651 /// \brief Print a template argument list, including the '<' and '>' 3652 /// enclosing the template arguments. 3653 // FIXME: remove the string ones. 3654 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 3655 unsigned NumArgs, 3656 const PrintingPolicy &Policy, 3657 bool SkipBrackets = false); 3658 3659 static std::string PrintTemplateArgumentList(const TemplateArgumentLoc *Args, 3660 unsigned NumArgs, 3661 const PrintingPolicy &Policy); 3662 3663 static std::string PrintTemplateArgumentList(const TemplateArgumentListInfo &, 3664 const PrintingPolicy &Policy); 3665 3666 /// \brief Print a template argument list, including the '<' and '>' 3667 /// enclosing the template arguments. 3668 static void PrintTemplateArgumentList(raw_ostream &OS, 3669 const TemplateArgument *Args, 3670 unsigned NumArgs, 3671 const PrintingPolicy &Policy, 3672 bool SkipBrackets = false); 3673 3674 static void PrintTemplateArgumentList(raw_ostream &OS, 3675 const TemplateArgumentLoc *Args, 3676 unsigned NumArgs, 3677 const PrintingPolicy &Policy); 3678 3679 static void PrintTemplateArgumentList(raw_ostream &OS, 3680 const TemplateArgumentListInfo &, 3681 const PrintingPolicy &Policy); 3682 3683 /// True if this template specialization type matches a current 3684 /// instantiation in the context in which it is found. 3685 bool isCurrentInstantiation() const { 3686 return isa<InjectedClassNameType>(getCanonicalTypeInternal()); 3687 } 3688 3689 /// \brief Determine if this template specialization type is for a type alias 3690 /// template that has been substituted. 3691 /// 3692 /// Nearly every template specialization type whose template is an alias 3693 /// template will be substituted. However, this is not the case when 3694 /// the specialization contains a pack expansion but the template alias 3695 /// does not have a corresponding parameter pack, e.g., 3696 /// 3697 /// \code 3698 /// template<typename T, typename U, typename V> struct S; 3699 /// template<typename T, typename U> using A = S<T, int, U>; 3700 /// template<typename... Ts> struct X { 3701 /// typedef A<Ts...> type; // not a type alias 3702 /// }; 3703 /// \endcode 3704 bool isTypeAlias() const { return TypeAlias; } 3705 3706 /// Get the aliased type, if this is a specialization of a type alias 3707 /// template. 3708 QualType getAliasedType() const { 3709 assert(isTypeAlias() && "not a type alias template specialization"); 3710 return *reinterpret_cast<const QualType*>(end()); 3711 } 3712 3713 typedef const TemplateArgument * iterator; 3714 3715 iterator begin() const { return getArgs(); } 3716 iterator end() const; // defined inline in TemplateBase.h 3717 3718 /// \brief Retrieve the name of the template that we are specializing. 3719 TemplateName getTemplateName() const { return Template; } 3720 3721 /// \brief Retrieve the template arguments. 3722 const TemplateArgument *getArgs() const { 3723 return reinterpret_cast<const TemplateArgument *>(this + 1); 3724 } 3725 3726 /// \brief Retrieve the number of template arguments. 3727 unsigned getNumArgs() const { return NumArgs; } 3728 3729 /// \brief Retrieve a specific template argument as a type. 3730 /// \pre @c isArgType(Arg) 3731 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 3732 3733 bool isSugared() const { 3734 return !isDependentType() || isCurrentInstantiation() || isTypeAlias(); 3735 } 3736 QualType desugar() const { return getCanonicalTypeInternal(); } 3737 3738 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) { 3739 Profile(ID, Template, getArgs(), NumArgs, Ctx); 3740 if (isTypeAlias()) 3741 getAliasedType().Profile(ID); 3742 } 3743 3744 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 3745 const TemplateArgument *Args, 3746 unsigned NumArgs, 3747 const ASTContext &Context); 3748 3749 static bool classof(const Type *T) { 3750 return T->getTypeClass() == TemplateSpecialization; 3751 } 3752}; 3753 3754/// \brief The injected class name of a C++ class template or class 3755/// template partial specialization. Used to record that a type was 3756/// spelled with a bare identifier rather than as a template-id; the 3757/// equivalent for non-templated classes is just RecordType. 3758/// 3759/// Injected class name types are always dependent. Template 3760/// instantiation turns these into RecordTypes. 3761/// 3762/// Injected class name types are always canonical. This works 3763/// because it is impossible to compare an injected class name type 3764/// with the corresponding non-injected template type, for the same 3765/// reason that it is impossible to directly compare template 3766/// parameters from different dependent contexts: injected class name 3767/// types can only occur within the scope of a particular templated 3768/// declaration, and within that scope every template specialization 3769/// will canonicalize to the injected class name (when appropriate 3770/// according to the rules of the language). 3771class InjectedClassNameType : public Type { 3772 CXXRecordDecl *Decl; 3773 3774 /// The template specialization which this type represents. 3775 /// For example, in 3776 /// template <class T> class A { ... }; 3777 /// this is A<T>, whereas in 3778 /// template <class X, class Y> class A<B<X,Y> > { ... }; 3779 /// this is A<B<X,Y> >. 3780 /// 3781 /// It is always unqualified, always a template specialization type, 3782 /// and always dependent. 3783 QualType InjectedType; 3784 3785 friend class ASTContext; // ASTContext creates these. 3786 friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not 3787 // currently suitable for AST reading, too much 3788 // interdependencies. 3789 InjectedClassNameType(CXXRecordDecl *D, QualType TST) 3790 : Type(InjectedClassName, QualType(), /*Dependent=*/true, 3791 /*InstantiationDependent=*/true, 3792 /*VariablyModified=*/false, 3793 /*ContainsUnexpandedParameterPack=*/false), 3794 Decl(D), InjectedType(TST) { 3795 assert(isa<TemplateSpecializationType>(TST)); 3796 assert(!TST.hasQualifiers()); 3797 assert(TST->isDependentType()); 3798 } 3799 3800public: 3801 QualType getInjectedSpecializationType() const { return InjectedType; } 3802 const TemplateSpecializationType *getInjectedTST() const { 3803 return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); 3804 } 3805 3806 CXXRecordDecl *getDecl() const; 3807 3808 bool isSugared() const { return false; } 3809 QualType desugar() const { return QualType(this, 0); } 3810 3811 static bool classof(const Type *T) { 3812 return T->getTypeClass() == InjectedClassName; 3813 } 3814}; 3815 3816/// \brief The kind of a tag type. 3817enum TagTypeKind { 3818 /// \brief The "struct" keyword. 3819 TTK_Struct, 3820 /// \brief The "__interface" keyword. 3821 TTK_Interface, 3822 /// \brief The "union" keyword. 3823 TTK_Union, 3824 /// \brief The "class" keyword. 3825 TTK_Class, 3826 /// \brief The "enum" keyword. 3827 TTK_Enum 3828}; 3829 3830/// \brief The elaboration keyword that precedes a qualified type name or 3831/// introduces an elaborated-type-specifier. 3832enum ElaboratedTypeKeyword { 3833 /// \brief The "struct" keyword introduces the elaborated-type-specifier. 3834 ETK_Struct, 3835 /// \brief The "__interface" keyword introduces the elaborated-type-specifier. 3836 ETK_Interface, 3837 /// \brief The "union" keyword introduces the elaborated-type-specifier. 3838 ETK_Union, 3839 /// \brief The "class" keyword introduces the elaborated-type-specifier. 3840 ETK_Class, 3841 /// \brief The "enum" keyword introduces the elaborated-type-specifier. 3842 ETK_Enum, 3843 /// \brief The "typename" keyword precedes the qualified type name, e.g., 3844 /// \c typename T::type. 3845 ETK_Typename, 3846 /// \brief No keyword precedes the qualified type name. 3847 ETK_None 3848}; 3849 3850/// A helper class for Type nodes having an ElaboratedTypeKeyword. 3851/// The keyword in stored in the free bits of the base class. 3852/// Also provides a few static helpers for converting and printing 3853/// elaborated type keyword and tag type kind enumerations. 3854class TypeWithKeyword : public Type { 3855protected: 3856 TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, 3857 QualType Canonical, bool Dependent, 3858 bool InstantiationDependent, bool VariablyModified, 3859 bool ContainsUnexpandedParameterPack) 3860 : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified, 3861 ContainsUnexpandedParameterPack) { 3862 TypeWithKeywordBits.Keyword = Keyword; 3863 } 3864 3865public: 3866 ElaboratedTypeKeyword getKeyword() const { 3867 return static_cast<ElaboratedTypeKeyword>(TypeWithKeywordBits.Keyword); 3868 } 3869 3870 /// getKeywordForTypeSpec - Converts a type specifier (DeclSpec::TST) 3871 /// into an elaborated type keyword. 3872 static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); 3873 3874 /// getTagTypeKindForTypeSpec - Converts a type specifier (DeclSpec::TST) 3875 /// into a tag type kind. It is an error to provide a type specifier 3876 /// which *isn't* a tag kind here. 3877 static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); 3878 3879 /// getKeywordForTagDeclKind - Converts a TagTypeKind into an 3880 /// elaborated type keyword. 3881 static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); 3882 3883 /// getTagTypeKindForKeyword - Converts an elaborated type keyword into 3884 // a TagTypeKind. It is an error to provide an elaborated type keyword 3885 /// which *isn't* a tag kind here. 3886 static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); 3887 3888 static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); 3889 3890 static const char *getKeywordName(ElaboratedTypeKeyword Keyword); 3891 3892 static const char *getTagTypeKindName(TagTypeKind Kind) { 3893 return getKeywordName(getKeywordForTagTypeKind(Kind)); 3894 } 3895 3896 class CannotCastToThisType {}; 3897 static CannotCastToThisType classof(const Type *); 3898}; 3899 3900/// \brief Represents a type that was referred to using an elaborated type 3901/// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, 3902/// or both. 3903/// 3904/// This type is used to keep track of a type name as written in the 3905/// source code, including tag keywords and any nested-name-specifiers. 3906/// The type itself is always "sugar", used to express what was written 3907/// in the source code but containing no additional semantic information. 3908class ElaboratedType : public TypeWithKeyword, public llvm::FoldingSetNode { 3909 3910 /// \brief The nested name specifier containing the qualifier. 3911 NestedNameSpecifier *NNS; 3912 3913 /// \brief The type that this qualified name refers to. 3914 QualType NamedType; 3915 3916 ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3917 QualType NamedType, QualType CanonType) 3918 : TypeWithKeyword(Keyword, Elaborated, CanonType, 3919 NamedType->isDependentType(), 3920 NamedType->isInstantiationDependentType(), 3921 NamedType->isVariablyModifiedType(), 3922 NamedType->containsUnexpandedParameterPack()), 3923 NNS(NNS), NamedType(NamedType) { 3924 assert(!(Keyword == ETK_None && NNS == 0) && 3925 "ElaboratedType cannot have elaborated type keyword " 3926 "and name qualifier both null."); 3927 } 3928 3929 friend class ASTContext; // ASTContext creates these 3930 3931public: 3932 ~ElaboratedType(); 3933 3934 /// \brief Retrieve the qualification on this type. 3935 NestedNameSpecifier *getQualifier() const { return NNS; } 3936 3937 /// \brief Retrieve the type named by the qualified-id. 3938 QualType getNamedType() const { return NamedType; } 3939 3940 /// \brief Remove a single level of sugar. 3941 QualType desugar() const { return getNamedType(); } 3942 3943 /// \brief Returns whether this type directly provides sugar. 3944 bool isSugared() const { return true; } 3945 3946 void Profile(llvm::FoldingSetNodeID &ID) { 3947 Profile(ID, getKeyword(), NNS, NamedType); 3948 } 3949 3950 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3951 NestedNameSpecifier *NNS, QualType NamedType) { 3952 ID.AddInteger(Keyword); 3953 ID.AddPointer(NNS); 3954 NamedType.Profile(ID); 3955 } 3956 3957 static bool classof(const Type *T) { 3958 return T->getTypeClass() == Elaborated; 3959 } 3960}; 3961 3962/// \brief Represents a qualified type name for which the type name is 3963/// dependent. 3964/// 3965/// DependentNameType represents a class of dependent types that involve a 3966/// dependent nested-name-specifier (e.g., "T::") followed by a (dependent) 3967/// name of a type. The DependentNameType may start with a "typename" (for a 3968/// typename-specifier), "class", "struct", "union", or "enum" (for a 3969/// dependent elaborated-type-specifier), or nothing (in contexts where we 3970/// know that we must be referring to a type, e.g., in a base class specifier). 3971class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { 3972 3973 /// \brief The nested name specifier containing the qualifier. 3974 NestedNameSpecifier *NNS; 3975 3976 /// \brief The type that this typename specifier refers to. 3977 const IdentifierInfo *Name; 3978 3979 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3980 const IdentifierInfo *Name, QualType CanonType) 3981 : TypeWithKeyword(Keyword, DependentName, CanonType, /*Dependent=*/true, 3982 /*InstantiationDependent=*/true, 3983 /*VariablyModified=*/false, 3984 NNS->containsUnexpandedParameterPack()), 3985 NNS(NNS), Name(Name) { 3986 assert(NNS->isDependent() && 3987 "DependentNameType requires a dependent nested-name-specifier"); 3988 } 3989 3990 friend class ASTContext; // ASTContext creates these 3991 3992public: 3993 /// \brief Retrieve the qualification on this type. 3994 NestedNameSpecifier *getQualifier() const { return NNS; } 3995 3996 /// \brief Retrieve the type named by the typename specifier as an 3997 /// identifier. 3998 /// 3999 /// This routine will return a non-NULL identifier pointer when the 4000 /// form of the original typename was terminated by an identifier, 4001 /// e.g., "typename T::type". 4002 const IdentifierInfo *getIdentifier() const { 4003 return Name; 4004 } 4005 4006 bool isSugared() const { return false; } 4007 QualType desugar() const { return QualType(this, 0); } 4008 4009 void Profile(llvm::FoldingSetNodeID &ID) { 4010 Profile(ID, getKeyword(), NNS, Name); 4011 } 4012 4013 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 4014 NestedNameSpecifier *NNS, const IdentifierInfo *Name) { 4015 ID.AddInteger(Keyword); 4016 ID.AddPointer(NNS); 4017 ID.AddPointer(Name); 4018 } 4019 4020 static bool classof(const Type *T) { 4021 return T->getTypeClass() == DependentName; 4022 } 4023}; 4024 4025/// DependentTemplateSpecializationType - Represents a template 4026/// specialization type whose template cannot be resolved, e.g. 4027/// A<T>::template B<T> 4028class DependentTemplateSpecializationType : 4029 public TypeWithKeyword, public llvm::FoldingSetNode { 4030 4031 /// \brief The nested name specifier containing the qualifier. 4032 NestedNameSpecifier *NNS; 4033 4034 /// \brief The identifier of the template. 4035 const IdentifierInfo *Name; 4036 4037 /// \brief - The number of template arguments named in this class 4038 /// template specialization. 4039 unsigned NumArgs; 4040 4041 const TemplateArgument *getArgBuffer() const { 4042 return reinterpret_cast<const TemplateArgument*>(this+1); 4043 } 4044 TemplateArgument *getArgBuffer() { 4045 return reinterpret_cast<TemplateArgument*>(this+1); 4046 } 4047 4048 DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 4049 NestedNameSpecifier *NNS, 4050 const IdentifierInfo *Name, 4051 unsigned NumArgs, 4052 const TemplateArgument *Args, 4053 QualType Canon); 4054 4055 friend class ASTContext; // ASTContext creates these 4056 4057public: 4058 NestedNameSpecifier *getQualifier() const { return NNS; } 4059 const IdentifierInfo *getIdentifier() const { return Name; } 4060 4061 /// \brief Retrieve the template arguments. 4062 const TemplateArgument *getArgs() const { 4063 return getArgBuffer(); 4064 } 4065 4066 /// \brief Retrieve the number of template arguments. 4067 unsigned getNumArgs() const { return NumArgs; } 4068 4069 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 4070 4071 typedef const TemplateArgument * iterator; 4072 iterator begin() const { return getArgs(); } 4073 iterator end() const; // inline in TemplateBase.h 4074 4075 bool isSugared() const { return false; } 4076 QualType desugar() const { return QualType(this, 0); } 4077 4078 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) { 4079 Profile(ID, Context, getKeyword(), NNS, Name, NumArgs, getArgs()); 4080 } 4081 4082 static void Profile(llvm::FoldingSetNodeID &ID, 4083 const ASTContext &Context, 4084 ElaboratedTypeKeyword Keyword, 4085 NestedNameSpecifier *Qualifier, 4086 const IdentifierInfo *Name, 4087 unsigned NumArgs, 4088 const TemplateArgument *Args); 4089 4090 static bool classof(const Type *T) { 4091 return T->getTypeClass() == DependentTemplateSpecialization; 4092 } 4093}; 4094 4095/// \brief Represents a pack expansion of types. 4096/// 4097/// Pack expansions are part of C++0x variadic templates. A pack 4098/// expansion contains a pattern, which itself contains one or more 4099/// "unexpanded" parameter packs. When instantiated, a pack expansion 4100/// produces a series of types, each instantiated from the pattern of 4101/// the expansion, where the Ith instantiation of the pattern uses the 4102/// Ith arguments bound to each of the unexpanded parameter packs. The 4103/// pack expansion is considered to "expand" these unexpanded 4104/// parameter packs. 4105/// 4106/// \code 4107/// template<typename ...Types> struct tuple; 4108/// 4109/// template<typename ...Types> 4110/// struct tuple_of_references { 4111/// typedef tuple<Types&...> type; 4112/// }; 4113/// \endcode 4114/// 4115/// Here, the pack expansion \c Types&... is represented via a 4116/// PackExpansionType whose pattern is Types&. 4117class PackExpansionType : public Type, public llvm::FoldingSetNode { 4118 /// \brief The pattern of the pack expansion. 4119 QualType Pattern; 4120 4121 /// \brief The number of expansions that this pack expansion will 4122 /// generate when substituted (+1), or indicates that 4123 /// 4124 /// This field will only have a non-zero value when some of the parameter 4125 /// packs that occur within the pattern have been substituted but others have 4126 /// not. 4127 unsigned NumExpansions; 4128 4129 PackExpansionType(QualType Pattern, QualType Canon, 4130 llvm::Optional<unsigned> NumExpansions) 4131 : Type(PackExpansion, Canon, /*Dependent=*/Pattern->isDependentType(), 4132 /*InstantiationDependent=*/true, 4133 /*VariableModified=*/Pattern->isVariablyModifiedType(), 4134 /*ContainsUnexpandedParameterPack=*/false), 4135 Pattern(Pattern), 4136 NumExpansions(NumExpansions? *NumExpansions + 1: 0) { } 4137 4138 friend class ASTContext; // ASTContext creates these 4139 4140public: 4141 /// \brief Retrieve the pattern of this pack expansion, which is the 4142 /// type that will be repeatedly instantiated when instantiating the 4143 /// pack expansion itself. 4144 QualType getPattern() const { return Pattern; } 4145 4146 /// \brief Retrieve the number of expansions that this pack expansion will 4147 /// generate, if known. 4148 llvm::Optional<unsigned> getNumExpansions() const { 4149 if (NumExpansions) 4150 return NumExpansions - 1; 4151 4152 return llvm::Optional<unsigned>(); 4153 } 4154 4155 bool isSugared() const { return false; } 4156 QualType desugar() const { return QualType(this, 0); } 4157 4158 void Profile(llvm::FoldingSetNodeID &ID) { 4159 Profile(ID, getPattern(), getNumExpansions()); 4160 } 4161 4162 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pattern, 4163 llvm::Optional<unsigned> NumExpansions) { 4164 ID.AddPointer(Pattern.getAsOpaquePtr()); 4165 ID.AddBoolean(NumExpansions); 4166 if (NumExpansions) 4167 ID.AddInteger(*NumExpansions); 4168 } 4169 4170 static bool classof(const Type *T) { 4171 return T->getTypeClass() == PackExpansion; 4172 } 4173}; 4174 4175/// ObjCObjectType - Represents a class type in Objective C. 4176/// Every Objective C type is a combination of a base type and a 4177/// list of protocols. 4178/// 4179/// Given the following declarations: 4180/// \code 4181/// \@class C; 4182/// \@protocol P; 4183/// \endcode 4184/// 4185/// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType 4186/// with base C and no protocols. 4187/// 4188/// 'C<P>' is an ObjCObjectType with base C and protocol list [P]. 4189/// 4190/// 'id' is a TypedefType which is sugar for an ObjCPointerType whose 4191/// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType 4192/// and no protocols. 4193/// 4194/// 'id<P>' is an ObjCPointerType whose pointee is an ObjCObjecType 4195/// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually 4196/// this should get its own sugar class to better represent the source. 4197class ObjCObjectType : public Type { 4198 // ObjCObjectType.NumProtocols - the number of protocols stored 4199 // after the ObjCObjectPointerType node. 4200 // 4201 // These protocols are those written directly on the type. If 4202 // protocol qualifiers ever become additive, the iterators will need 4203 // to get kindof complicated. 4204 // 4205 // In the canonical object type, these are sorted alphabetically 4206 // and uniqued. 4207 4208 /// Either a BuiltinType or an InterfaceType or sugar for either. 4209 QualType BaseType; 4210 4211 ObjCProtocolDecl * const *getProtocolStorage() const { 4212 return const_cast<ObjCObjectType*>(this)->getProtocolStorage(); 4213 } 4214 4215 ObjCProtocolDecl **getProtocolStorage(); 4216 4217protected: 4218 ObjCObjectType(QualType Canonical, QualType Base, 4219 ObjCProtocolDecl * const *Protocols, unsigned NumProtocols); 4220 4221 enum Nonce_ObjCInterface { Nonce_ObjCInterface }; 4222 ObjCObjectType(enum Nonce_ObjCInterface) 4223 : Type(ObjCInterface, QualType(), false, false, false, false), 4224 BaseType(QualType(this_(), 0)) { 4225 ObjCObjectTypeBits.NumProtocols = 0; 4226 } 4227 4228public: 4229 /// getBaseType - Gets the base type of this object type. This is 4230 /// always (possibly sugar for) one of: 4231 /// - the 'id' builtin type (as opposed to the 'id' type visible to the 4232 /// user, which is a typedef for an ObjCPointerType) 4233 /// - the 'Class' builtin type (same caveat) 4234 /// - an ObjCObjectType (currently always an ObjCInterfaceType) 4235 QualType getBaseType() const { return BaseType; } 4236 4237 bool isObjCId() const { 4238 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); 4239 } 4240 bool isObjCClass() const { 4241 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); 4242 } 4243 bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } 4244 bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } 4245 bool isObjCUnqualifiedIdOrClass() const { 4246 if (!qual_empty()) return false; 4247 if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) 4248 return T->getKind() == BuiltinType::ObjCId || 4249 T->getKind() == BuiltinType::ObjCClass; 4250 return false; 4251 } 4252 bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } 4253 bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } 4254 4255 /// Gets the interface declaration for this object type, if the base type 4256 /// really is an interface. 4257 ObjCInterfaceDecl *getInterface() const; 4258 4259 typedef ObjCProtocolDecl * const *qual_iterator; 4260 4261 qual_iterator qual_begin() const { return getProtocolStorage(); } 4262 qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } 4263 4264 bool qual_empty() const { return getNumProtocols() == 0; } 4265 4266 /// getNumProtocols - Return the number of qualifying protocols in this 4267 /// interface type, or 0 if there are none. 4268 unsigned getNumProtocols() const { return ObjCObjectTypeBits.NumProtocols; } 4269 4270 /// \brief Fetch a protocol by index. 4271 ObjCProtocolDecl *getProtocol(unsigned I) const { 4272 assert(I < getNumProtocols() && "Out-of-range protocol access"); 4273 return qual_begin()[I]; 4274 } 4275 4276 bool isSugared() const { return false; } 4277 QualType desugar() const { return QualType(this, 0); } 4278 4279 static bool classof(const Type *T) { 4280 return T->getTypeClass() == ObjCObject || 4281 T->getTypeClass() == ObjCInterface; 4282 } 4283}; 4284 4285/// ObjCObjectTypeImpl - A class providing a concrete implementation 4286/// of ObjCObjectType, so as to not increase the footprint of 4287/// ObjCInterfaceType. Code outside of ASTContext and the core type 4288/// system should not reference this type. 4289class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { 4290 friend class ASTContext; 4291 4292 // If anyone adds fields here, ObjCObjectType::getProtocolStorage() 4293 // will need to be modified. 4294 4295 ObjCObjectTypeImpl(QualType Canonical, QualType Base, 4296 ObjCProtocolDecl * const *Protocols, 4297 unsigned NumProtocols) 4298 : ObjCObjectType(Canonical, Base, Protocols, NumProtocols) {} 4299 4300public: 4301 void Profile(llvm::FoldingSetNodeID &ID); 4302 static void Profile(llvm::FoldingSetNodeID &ID, 4303 QualType Base, 4304 ObjCProtocolDecl *const *protocols, 4305 unsigned NumProtocols); 4306}; 4307 4308inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorage() { 4309 return reinterpret_cast<ObjCProtocolDecl**>( 4310 static_cast<ObjCObjectTypeImpl*>(this) + 1); 4311} 4312 4313/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 4314/// object oriented design. They basically correspond to C++ classes. There 4315/// are two kinds of interface types, normal interfaces like "NSString" and 4316/// qualified interfaces, which are qualified with a protocol list like 4317/// "NSString<NSCopyable, NSAmazing>". 4318/// 4319/// ObjCInterfaceType guarantees the following properties when considered 4320/// as a subtype of its superclass, ObjCObjectType: 4321/// - There are no protocol qualifiers. To reinforce this, code which 4322/// tries to invoke the protocol methods via an ObjCInterfaceType will 4323/// fail to compile. 4324/// - It is its own base type. That is, if T is an ObjCInterfaceType*, 4325/// T->getBaseType() == QualType(T, 0). 4326class ObjCInterfaceType : public ObjCObjectType { 4327 mutable ObjCInterfaceDecl *Decl; 4328 4329 ObjCInterfaceType(const ObjCInterfaceDecl *D) 4330 : ObjCObjectType(Nonce_ObjCInterface), 4331 Decl(const_cast<ObjCInterfaceDecl*>(D)) {} 4332 friend class ASTContext; // ASTContext creates these. 4333 friend class ASTReader; 4334 friend class ObjCInterfaceDecl; 4335 4336public: 4337 /// getDecl - Get the declaration of this interface. 4338 ObjCInterfaceDecl *getDecl() const { return Decl; } 4339 4340 bool isSugared() const { return false; } 4341 QualType desugar() const { return QualType(this, 0); } 4342 4343 static bool classof(const Type *T) { 4344 return T->getTypeClass() == ObjCInterface; 4345 } 4346 4347 // Nonsense to "hide" certain members of ObjCObjectType within this 4348 // class. People asking for protocols on an ObjCInterfaceType are 4349 // not going to get what they want: ObjCInterfaceTypes are 4350 // guaranteed to have no protocols. 4351 enum { 4352 qual_iterator, 4353 qual_begin, 4354 qual_end, 4355 getNumProtocols, 4356 getProtocol 4357 }; 4358}; 4359 4360inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { 4361 if (const ObjCInterfaceType *T = 4362 getBaseType()->getAs<ObjCInterfaceType>()) 4363 return T->getDecl(); 4364 return 0; 4365} 4366 4367/// ObjCObjectPointerType - Used to represent a pointer to an 4368/// Objective C object. These are constructed from pointer 4369/// declarators when the pointee type is an ObjCObjectType (or sugar 4370/// for one). In addition, the 'id' and 'Class' types are typedefs 4371/// for these, and the protocol-qualified types 'id<P>' and 'Class<P>' 4372/// are translated into these. 4373/// 4374/// Pointers to pointers to Objective C objects are still PointerTypes; 4375/// only the first level of pointer gets it own type implementation. 4376class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 4377 QualType PointeeType; 4378 4379 ObjCObjectPointerType(QualType Canonical, QualType Pointee) 4380 : Type(ObjCObjectPointer, Canonical, false, false, false, false), 4381 PointeeType(Pointee) {} 4382 friend class ASTContext; // ASTContext creates these. 4383 4384public: 4385 /// getPointeeType - Gets the type pointed to by this ObjC pointer. 4386 /// The result will always be an ObjCObjectType or sugar thereof. 4387 QualType getPointeeType() const { return PointeeType; } 4388 4389 /// getObjCObjectType - Gets the type pointed to by this ObjC 4390 /// pointer. This method always returns non-null. 4391 /// 4392 /// This method is equivalent to getPointeeType() except that 4393 /// it discards any typedefs (or other sugar) between this 4394 /// type and the "outermost" object type. So for: 4395 /// \code 4396 /// \@class A; \@protocol P; \@protocol Q; 4397 /// typedef A<P> AP; 4398 /// typedef A A1; 4399 /// typedef A1<P> A1P; 4400 /// typedef A1P<Q> A1PQ; 4401 /// \endcode 4402 /// For 'A*', getObjectType() will return 'A'. 4403 /// For 'A<P>*', getObjectType() will return 'A<P>'. 4404 /// For 'AP*', getObjectType() will return 'A<P>'. 4405 /// For 'A1*', getObjectType() will return 'A'. 4406 /// For 'A1<P>*', getObjectType() will return 'A1<P>'. 4407 /// For 'A1P*', getObjectType() will return 'A1<P>'. 4408 /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because 4409 /// adding protocols to a protocol-qualified base discards the 4410 /// old qualifiers (for now). But if it didn't, getObjectType() 4411 /// would return 'A1P<Q>' (and we'd have to make iterating over 4412 /// qualifiers more complicated). 4413 const ObjCObjectType *getObjectType() const { 4414 return PointeeType->castAs<ObjCObjectType>(); 4415 } 4416 4417 /// getInterfaceType - If this pointer points to an Objective C 4418 /// \@interface type, gets the type for that interface. Any protocol 4419 /// qualifiers on the interface are ignored. 4420 /// 4421 /// \return null if the base type for this pointer is 'id' or 'Class' 4422 const ObjCInterfaceType *getInterfaceType() const { 4423 return getObjectType()->getBaseType()->getAs<ObjCInterfaceType>(); 4424 } 4425 4426 /// getInterfaceDecl - If this pointer points to an Objective \@interface 4427 /// type, gets the declaration for that interface. 4428 /// 4429 /// \return null if the base type for this pointer is 'id' or 'Class' 4430 ObjCInterfaceDecl *getInterfaceDecl() const { 4431 return getObjectType()->getInterface(); 4432 } 4433 4434 /// isObjCIdType - True if this is equivalent to the 'id' type, i.e. if 4435 /// its object type is the primitive 'id' type with no protocols. 4436 bool isObjCIdType() const { 4437 return getObjectType()->isObjCUnqualifiedId(); 4438 } 4439 4440 /// isObjCClassType - True if this is equivalent to the 'Class' type, 4441 /// i.e. if its object tive is the primitive 'Class' type with no protocols. 4442 bool isObjCClassType() const { 4443 return getObjectType()->isObjCUnqualifiedClass(); 4444 } 4445 4446 /// isObjCQualifiedIdType - True if this is equivalent to 'id<P>' for some 4447 /// non-empty set of protocols. 4448 bool isObjCQualifiedIdType() const { 4449 return getObjectType()->isObjCQualifiedId(); 4450 } 4451 4452 /// isObjCQualifiedClassType - True if this is equivalent to 'Class<P>' for 4453 /// some non-empty set of protocols. 4454 bool isObjCQualifiedClassType() const { 4455 return getObjectType()->isObjCQualifiedClass(); 4456 } 4457 4458 /// An iterator over the qualifiers on the object type. Provided 4459 /// for convenience. This will always iterate over the full set of 4460 /// protocols on a type, not just those provided directly. 4461 typedef ObjCObjectType::qual_iterator qual_iterator; 4462 4463 qual_iterator qual_begin() const { 4464 return getObjectType()->qual_begin(); 4465 } 4466 qual_iterator qual_end() const { 4467 return getObjectType()->qual_end(); 4468 } 4469 bool qual_empty() const { return getObjectType()->qual_empty(); } 4470 4471 /// getNumProtocols - Return the number of qualifying protocols on 4472 /// the object type. 4473 unsigned getNumProtocols() const { 4474 return getObjectType()->getNumProtocols(); 4475 } 4476 4477 /// \brief Retrieve a qualifying protocol by index on the object 4478 /// type. 4479 ObjCProtocolDecl *getProtocol(unsigned I) const { 4480 return getObjectType()->getProtocol(I); 4481 } 4482 4483 bool isSugared() const { return false; } 4484 QualType desugar() const { return QualType(this, 0); } 4485 4486 void Profile(llvm::FoldingSetNodeID &ID) { 4487 Profile(ID, getPointeeType()); 4488 } 4489 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 4490 ID.AddPointer(T.getAsOpaquePtr()); 4491 } 4492 static bool classof(const Type *T) { 4493 return T->getTypeClass() == ObjCObjectPointer; 4494 } 4495}; 4496 4497class AtomicType : public Type, public llvm::FoldingSetNode { 4498 QualType ValueType; 4499 4500 AtomicType(QualType ValTy, QualType Canonical) 4501 : Type(Atomic, Canonical, ValTy->isDependentType(), 4502 ValTy->isInstantiationDependentType(), 4503 ValTy->isVariablyModifiedType(), 4504 ValTy->containsUnexpandedParameterPack()), 4505 ValueType(ValTy) {} 4506 friend class ASTContext; // ASTContext creates these. 4507 4508 public: 4509 /// getValueType - Gets the type contained by this atomic type, i.e. 4510 /// the type returned by performing an atomic load of this atomic type. 4511 QualType getValueType() const { return ValueType; } 4512 4513 bool isSugared() const { return false; } 4514 QualType desugar() const { return QualType(this, 0); } 4515 4516 void Profile(llvm::FoldingSetNodeID &ID) { 4517 Profile(ID, getValueType()); 4518 } 4519 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 4520 ID.AddPointer(T.getAsOpaquePtr()); 4521 } 4522 static bool classof(const Type *T) { 4523 return T->getTypeClass() == Atomic; 4524 } 4525}; 4526 4527/// A qualifier set is used to build a set of qualifiers. 4528class QualifierCollector : public Qualifiers { 4529public: 4530 QualifierCollector(Qualifiers Qs = Qualifiers()) : Qualifiers(Qs) {} 4531 4532 /// Collect any qualifiers on the given type and return an 4533 /// unqualified type. The qualifiers are assumed to be consistent 4534 /// with those already in the type. 4535 const Type *strip(QualType type) { 4536 addFastQualifiers(type.getLocalFastQualifiers()); 4537 if (!type.hasLocalNonFastQualifiers()) 4538 return type.getTypePtrUnsafe(); 4539 4540 const ExtQuals *extQuals = type.getExtQualsUnsafe(); 4541 addConsistentQualifiers(extQuals->getQualifiers()); 4542 return extQuals->getBaseType(); 4543 } 4544 4545 /// Apply the collected qualifiers to the given type. 4546 QualType apply(const ASTContext &Context, QualType QT) const; 4547 4548 /// Apply the collected qualifiers to the given type. 4549 QualType apply(const ASTContext &Context, const Type* T) const; 4550}; 4551 4552 4553// Inline function definitions. 4554 4555inline SplitQualType SplitQualType::getSingleStepDesugaredType() const { 4556 SplitQualType desugar = 4557 Ty->getLocallyUnqualifiedSingleStepDesugaredType().split(); 4558 desugar.Quals.addConsistentQualifiers(Quals); 4559 return desugar; 4560} 4561 4562inline const Type *QualType::getTypePtr() const { 4563 return getCommonPtr()->BaseType; 4564} 4565 4566inline const Type *QualType::getTypePtrOrNull() const { 4567 return (isNull() ? 0 : getCommonPtr()->BaseType); 4568} 4569 4570inline SplitQualType QualType::split() const { 4571 if (!hasLocalNonFastQualifiers()) 4572 return SplitQualType(getTypePtrUnsafe(), 4573 Qualifiers::fromFastMask(getLocalFastQualifiers())); 4574 4575 const ExtQuals *eq = getExtQualsUnsafe(); 4576 Qualifiers qs = eq->getQualifiers(); 4577 qs.addFastQualifiers(getLocalFastQualifiers()); 4578 return SplitQualType(eq->getBaseType(), qs); 4579} 4580 4581inline Qualifiers QualType::getLocalQualifiers() const { 4582 Qualifiers Quals; 4583 if (hasLocalNonFastQualifiers()) 4584 Quals = getExtQualsUnsafe()->getQualifiers(); 4585 Quals.addFastQualifiers(getLocalFastQualifiers()); 4586 return Quals; 4587} 4588 4589inline Qualifiers QualType::getQualifiers() const { 4590 Qualifiers quals = getCommonPtr()->CanonicalType.getLocalQualifiers(); 4591 quals.addFastQualifiers(getLocalFastQualifiers()); 4592 return quals; 4593} 4594 4595inline unsigned QualType::getCVRQualifiers() const { 4596 unsigned cvr = getCommonPtr()->CanonicalType.getLocalCVRQualifiers(); 4597 cvr |= getLocalCVRQualifiers(); 4598 return cvr; 4599} 4600 4601inline QualType QualType::getCanonicalType() const { 4602 QualType canon = getCommonPtr()->CanonicalType; 4603 return canon.withFastQualifiers(getLocalFastQualifiers()); 4604} 4605 4606inline bool QualType::isCanonical() const { 4607 return getTypePtr()->isCanonicalUnqualified(); 4608} 4609 4610inline bool QualType::isCanonicalAsParam() const { 4611 if (!isCanonical()) return false; 4612 if (hasLocalQualifiers()) return false; 4613 4614 const Type *T = getTypePtr(); 4615 if (T->isVariablyModifiedType() && T->hasSizedVLAType()) 4616 return false; 4617 4618 return !isa<FunctionType>(T) && !isa<ArrayType>(T); 4619} 4620 4621inline bool QualType::isConstQualified() const { 4622 return isLocalConstQualified() || 4623 getCommonPtr()->CanonicalType.isLocalConstQualified(); 4624} 4625 4626inline bool QualType::isRestrictQualified() const { 4627 return isLocalRestrictQualified() || 4628 getCommonPtr()->CanonicalType.isLocalRestrictQualified(); 4629} 4630 4631 4632inline bool QualType::isVolatileQualified() const { 4633 return isLocalVolatileQualified() || 4634 getCommonPtr()->CanonicalType.isLocalVolatileQualified(); 4635} 4636 4637inline bool QualType::hasQualifiers() const { 4638 return hasLocalQualifiers() || 4639 getCommonPtr()->CanonicalType.hasLocalQualifiers(); 4640} 4641 4642inline QualType QualType::getUnqualifiedType() const { 4643 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4644 return QualType(getTypePtr(), 0); 4645 4646 return QualType(getSplitUnqualifiedTypeImpl(*this).Ty, 0); 4647} 4648 4649inline SplitQualType QualType::getSplitUnqualifiedType() const { 4650 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4651 return split(); 4652 4653 return getSplitUnqualifiedTypeImpl(*this); 4654} 4655 4656inline void QualType::removeLocalConst() { 4657 removeLocalFastQualifiers(Qualifiers::Const); 4658} 4659 4660inline void QualType::removeLocalRestrict() { 4661 removeLocalFastQualifiers(Qualifiers::Restrict); 4662} 4663 4664inline void QualType::removeLocalVolatile() { 4665 removeLocalFastQualifiers(Qualifiers::Volatile); 4666} 4667 4668inline void QualType::removeLocalCVRQualifiers(unsigned Mask) { 4669 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 4670 assert((int)Qualifiers::CVRMask == (int)Qualifiers::FastMask); 4671 4672 // Fast path: we don't need to touch the slow qualifiers. 4673 removeLocalFastQualifiers(Mask); 4674} 4675 4676/// getAddressSpace - Return the address space of this type. 4677inline unsigned QualType::getAddressSpace() const { 4678 return getQualifiers().getAddressSpace(); 4679} 4680 4681/// getObjCGCAttr - Return the gc attribute of this type. 4682inline Qualifiers::GC QualType::getObjCGCAttr() const { 4683 return getQualifiers().getObjCGCAttr(); 4684} 4685 4686inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { 4687 if (const PointerType *PT = t.getAs<PointerType>()) { 4688 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 4689 return FT->getExtInfo(); 4690 } else if (const FunctionType *FT = t.getAs<FunctionType>()) 4691 return FT->getExtInfo(); 4692 4693 return FunctionType::ExtInfo(); 4694} 4695 4696inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { 4697 return getFunctionExtInfo(*t); 4698} 4699 4700/// isMoreQualifiedThan - Determine whether this type is more 4701/// qualified than the Other type. For example, "const volatile int" 4702/// is more qualified than "const int", "volatile int", and 4703/// "int". However, it is not more qualified than "const volatile 4704/// int". 4705inline bool QualType::isMoreQualifiedThan(QualType other) const { 4706 Qualifiers myQuals = getQualifiers(); 4707 Qualifiers otherQuals = other.getQualifiers(); 4708 return (myQuals != otherQuals && myQuals.compatiblyIncludes(otherQuals)); 4709} 4710 4711/// isAtLeastAsQualifiedAs - Determine whether this type is at last 4712/// as qualified as the Other type. For example, "const volatile 4713/// int" is at least as qualified as "const int", "volatile int", 4714/// "int", and "const volatile int". 4715inline bool QualType::isAtLeastAsQualifiedAs(QualType other) const { 4716 return getQualifiers().compatiblyIncludes(other.getQualifiers()); 4717} 4718 4719/// getNonReferenceType - If Type is a reference type (e.g., const 4720/// int&), returns the type that the reference refers to ("const 4721/// int"). Otherwise, returns the type itself. This routine is used 4722/// throughout Sema to implement C++ 5p6: 4723/// 4724/// If an expression initially has the type "reference to T" (8.3.2, 4725/// 8.5.3), the type is adjusted to "T" prior to any further 4726/// analysis, the expression designates the object or function 4727/// denoted by the reference, and the expression is an lvalue. 4728inline QualType QualType::getNonReferenceType() const { 4729 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 4730 return RefType->getPointeeType(); 4731 else 4732 return *this; 4733} 4734 4735inline bool QualType::isCForbiddenLValueType() const { 4736 return ((getTypePtr()->isVoidType() && !hasQualifiers()) || 4737 getTypePtr()->isFunctionType()); 4738} 4739 4740/// \brief Tests whether the type is categorized as a fundamental type. 4741/// 4742/// \returns True for types specified in C++0x [basic.fundamental]. 4743inline bool Type::isFundamentalType() const { 4744 return isVoidType() || 4745 // FIXME: It's really annoying that we don't have an 4746 // 'isArithmeticType()' which agrees with the standard definition. 4747 (isArithmeticType() && !isEnumeralType()); 4748} 4749 4750/// \brief Tests whether the type is categorized as a compound type. 4751/// 4752/// \returns True for types specified in C++0x [basic.compound]. 4753inline bool Type::isCompoundType() const { 4754 // C++0x [basic.compound]p1: 4755 // Compound types can be constructed in the following ways: 4756 // -- arrays of objects of a given type [...]; 4757 return isArrayType() || 4758 // -- functions, which have parameters of given types [...]; 4759 isFunctionType() || 4760 // -- pointers to void or objects or functions [...]; 4761 isPointerType() || 4762 // -- references to objects or functions of a given type. [...] 4763 isReferenceType() || 4764 // -- classes containing a sequence of objects of various types, [...]; 4765 isRecordType() || 4766 // -- unions, which are classes capable of containing objects of different 4767 // types at different times; 4768 isUnionType() || 4769 // -- enumerations, which comprise a set of named constant values. [...]; 4770 isEnumeralType() || 4771 // -- pointers to non-static class members, [...]. 4772 isMemberPointerType(); 4773} 4774 4775inline bool Type::isFunctionType() const { 4776 return isa<FunctionType>(CanonicalType); 4777} 4778inline bool Type::isPointerType() const { 4779 return isa<PointerType>(CanonicalType); 4780} 4781inline bool Type::isAnyPointerType() const { 4782 return isPointerType() || isObjCObjectPointerType(); 4783} 4784inline bool Type::isBlockPointerType() const { 4785 return isa<BlockPointerType>(CanonicalType); 4786} 4787inline bool Type::isReferenceType() const { 4788 return isa<ReferenceType>(CanonicalType); 4789} 4790inline bool Type::isLValueReferenceType() const { 4791 return isa<LValueReferenceType>(CanonicalType); 4792} 4793inline bool Type::isRValueReferenceType() const { 4794 return isa<RValueReferenceType>(CanonicalType); 4795} 4796inline bool Type::isFunctionPointerType() const { 4797 if (const PointerType *T = getAs<PointerType>()) 4798 return T->getPointeeType()->isFunctionType(); 4799 else 4800 return false; 4801} 4802inline bool Type::isMemberPointerType() const { 4803 return isa<MemberPointerType>(CanonicalType); 4804} 4805inline bool Type::isMemberFunctionPointerType() const { 4806 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4807 return T->isMemberFunctionPointer(); 4808 else 4809 return false; 4810} 4811inline bool Type::isMemberDataPointerType() const { 4812 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4813 return T->isMemberDataPointer(); 4814 else 4815 return false; 4816} 4817inline bool Type::isArrayType() const { 4818 return isa<ArrayType>(CanonicalType); 4819} 4820inline bool Type::isConstantArrayType() const { 4821 return isa<ConstantArrayType>(CanonicalType); 4822} 4823inline bool Type::isIncompleteArrayType() const { 4824 return isa<IncompleteArrayType>(CanonicalType); 4825} 4826inline bool Type::isVariableArrayType() const { 4827 return isa<VariableArrayType>(CanonicalType); 4828} 4829inline bool Type::isDependentSizedArrayType() const { 4830 return isa<DependentSizedArrayType>(CanonicalType); 4831} 4832inline bool Type::isBuiltinType() const { 4833 return isa<BuiltinType>(CanonicalType); 4834} 4835inline bool Type::isRecordType() const { 4836 return isa<RecordType>(CanonicalType); 4837} 4838inline bool Type::isEnumeralType() const { 4839 return isa<EnumType>(CanonicalType); 4840} 4841inline bool Type::isAnyComplexType() const { 4842 return isa<ComplexType>(CanonicalType); 4843} 4844inline bool Type::isVectorType() const { 4845 return isa<VectorType>(CanonicalType); 4846} 4847inline bool Type::isExtVectorType() const { 4848 return isa<ExtVectorType>(CanonicalType); 4849} 4850inline bool Type::isObjCObjectPointerType() const { 4851 return isa<ObjCObjectPointerType>(CanonicalType); 4852} 4853inline bool Type::isObjCObjectType() const { 4854 return isa<ObjCObjectType>(CanonicalType); 4855} 4856inline bool Type::isObjCObjectOrInterfaceType() const { 4857 return isa<ObjCInterfaceType>(CanonicalType) || 4858 isa<ObjCObjectType>(CanonicalType); 4859} 4860inline bool Type::isAtomicType() const { 4861 return isa<AtomicType>(CanonicalType); 4862} 4863 4864inline bool Type::isObjCQualifiedIdType() const { 4865 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4866 return OPT->isObjCQualifiedIdType(); 4867 return false; 4868} 4869inline bool Type::isObjCQualifiedClassType() const { 4870 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4871 return OPT->isObjCQualifiedClassType(); 4872 return false; 4873} 4874inline bool Type::isObjCIdType() const { 4875 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4876 return OPT->isObjCIdType(); 4877 return false; 4878} 4879inline bool Type::isObjCClassType() const { 4880 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4881 return OPT->isObjCClassType(); 4882 return false; 4883} 4884inline bool Type::isObjCSelType() const { 4885 if (const PointerType *OPT = getAs<PointerType>()) 4886 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 4887 return false; 4888} 4889inline bool Type::isObjCBuiltinType() const { 4890 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 4891} 4892 4893inline bool Type::isImage1dT() const { 4894 return isSpecificBuiltinType(BuiltinType::OCLImage1d); 4895} 4896 4897inline bool Type::isImage1dArrayT() const { 4898 return isSpecificBuiltinType(BuiltinType::OCLImage1dArray); 4899} 4900 4901inline bool Type::isImage1dBufferT() const { 4902 return isSpecificBuiltinType(BuiltinType::OCLImage1dBuffer); 4903} 4904 4905inline bool Type::isImage2dT() const { 4906 return isSpecificBuiltinType(BuiltinType::OCLImage2d); 4907} 4908 4909inline bool Type::isImage2dArrayT() const { 4910 return isSpecificBuiltinType(BuiltinType::OCLImage2dArray); 4911} 4912 4913inline bool Type::isImage3dT() const { 4914 return isSpecificBuiltinType(BuiltinType::OCLImage3d); 4915} 4916inline bool Type::isImageType() const { 4917 return isImage3dT() || 4918 isImage2dT() || isImage2dArrayT() || 4919 isImage1dT() || isImage1dArrayT() || isImage1dBufferT(); 4920} 4921 4922inline bool Type::isOpenCLSpecificType() const { 4923 return isImageType(); 4924} 4925 4926inline bool Type::isTemplateTypeParmType() const { 4927 return isa<TemplateTypeParmType>(CanonicalType); 4928} 4929 4930inline bool Type::isSpecificBuiltinType(unsigned K) const { 4931 if (const BuiltinType *BT = getAs<BuiltinType>()) 4932 if (BT->getKind() == (BuiltinType::Kind) K) 4933 return true; 4934 return false; 4935} 4936 4937inline bool Type::isPlaceholderType() const { 4938 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4939 return BT->isPlaceholderType(); 4940 return false; 4941} 4942 4943inline const BuiltinType *Type::getAsPlaceholderType() const { 4944 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4945 if (BT->isPlaceholderType()) 4946 return BT; 4947 return 0; 4948} 4949 4950inline bool Type::isSpecificPlaceholderType(unsigned K) const { 4951 assert(BuiltinType::isPlaceholderTypeKind((BuiltinType::Kind) K)); 4952 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4953 return (BT->getKind() == (BuiltinType::Kind) K); 4954 return false; 4955} 4956 4957inline bool Type::isNonOverloadPlaceholderType() const { 4958 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4959 return BT->isNonOverloadPlaceholderType(); 4960 return false; 4961} 4962 4963inline bool Type::isVoidType() const { 4964 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 4965 return BT->getKind() == BuiltinType::Void; 4966 return false; 4967} 4968 4969inline bool Type::isHalfType() const { 4970 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 4971 return BT->getKind() == BuiltinType::Half; 4972 // FIXME: Should we allow complex __fp16? Probably not. 4973 return false; 4974} 4975 4976inline bool Type::isNullPtrType() const { 4977 if (const BuiltinType *BT = getAs<BuiltinType>()) 4978 return BT->getKind() == BuiltinType::NullPtr; 4979 return false; 4980} 4981 4982extern bool IsEnumDeclComplete(EnumDecl *); 4983extern bool IsEnumDeclScoped(EnumDecl *); 4984 4985inline bool Type::isIntegerType() const { 4986 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 4987 return BT->getKind() >= BuiltinType::Bool && 4988 BT->getKind() <= BuiltinType::Int128; 4989 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) { 4990 // Incomplete enum types are not treated as integer types. 4991 // FIXME: In C++, enum types are never integer types. 4992 return IsEnumDeclComplete(ET->getDecl()) && 4993 !IsEnumDeclScoped(ET->getDecl()); 4994 } 4995 return false; 4996} 4997 4998inline bool Type::isScalarType() const { 4999 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 5000 return BT->getKind() > BuiltinType::Void && 5001 BT->getKind() <= BuiltinType::NullPtr; 5002 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) 5003 // Enums are scalar types, but only if they are defined. Incomplete enums 5004 // are not treated as scalar types. 5005 return IsEnumDeclComplete(ET->getDecl()); 5006 return isa<PointerType>(CanonicalType) || 5007 isa<BlockPointerType>(CanonicalType) || 5008 isa<MemberPointerType>(CanonicalType) || 5009 isa<ComplexType>(CanonicalType) || 5010 isa<ObjCObjectPointerType>(CanonicalType); 5011} 5012 5013inline bool Type::isIntegralOrEnumerationType() const { 5014 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 5015 return BT->getKind() >= BuiltinType::Bool && 5016 BT->getKind() <= BuiltinType::Int128; 5017 5018 // Check for a complete enum type; incomplete enum types are not properly an 5019 // enumeration type in the sense required here. 5020 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) 5021 return IsEnumDeclComplete(ET->getDecl()); 5022 5023 return false; 5024} 5025 5026inline bool Type::isBooleanType() const { 5027 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 5028 return BT->getKind() == BuiltinType::Bool; 5029 return false; 5030} 5031 5032/// \brief Determines whether this is a type for which one can define 5033/// an overloaded operator. 5034inline bool Type::isOverloadableType() const { 5035 return isDependentType() || isRecordType() || isEnumeralType(); 5036} 5037 5038/// \brief Determines whether this type can decay to a pointer type. 5039inline bool Type::canDecayToPointerType() const { 5040 return isFunctionType() || isArrayType(); 5041} 5042 5043inline bool Type::hasPointerRepresentation() const { 5044 return (isPointerType() || isReferenceType() || isBlockPointerType() || 5045 isObjCObjectPointerType() || isNullPtrType()); 5046} 5047 5048inline bool Type::hasObjCPointerRepresentation() const { 5049 return isObjCObjectPointerType(); 5050} 5051 5052inline const Type *Type::getBaseElementTypeUnsafe() const { 5053 const Type *type = this; 5054 while (const ArrayType *arrayType = type->getAsArrayTypeUnsafe()) 5055 type = arrayType->getElementType().getTypePtr(); 5056 return type; 5057} 5058 5059/// Insertion operator for diagnostics. This allows sending QualType's into a 5060/// diagnostic with <<. 5061inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 5062 QualType T) { 5063 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 5064 DiagnosticsEngine::ak_qualtype); 5065 return DB; 5066} 5067 5068/// Insertion operator for partial diagnostics. This allows sending QualType's 5069/// into a diagnostic with <<. 5070inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, 5071 QualType T) { 5072 PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 5073 DiagnosticsEngine::ak_qualtype); 5074 return PD; 5075} 5076 5077// Helper class template that is used by Type::getAs to ensure that one does 5078// not try to look through a qualified type to get to an array type. 5079template<typename T, 5080 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 5081 llvm::is_base_of<ArrayType, T>::value)> 5082struct ArrayType_cannot_be_used_with_getAs { }; 5083 5084template<typename T> 5085struct ArrayType_cannot_be_used_with_getAs<T, true>; 5086 5087// Member-template getAs<specific type>'. 5088template <typename T> const T *Type::getAs() const { 5089 ArrayType_cannot_be_used_with_getAs<T> at; 5090 (void)at; 5091 5092 // If this is directly a T type, return it. 5093 if (const T *Ty = dyn_cast<T>(this)) 5094 return Ty; 5095 5096 // If the canonical form of this type isn't the right kind, reject it. 5097 if (!isa<T>(CanonicalType)) 5098 return 0; 5099 5100 // If this is a typedef for the type, strip the typedef off without 5101 // losing all typedef information. 5102 return cast<T>(getUnqualifiedDesugaredType()); 5103} 5104 5105inline const ArrayType *Type::getAsArrayTypeUnsafe() const { 5106 // If this is directly an array type, return it. 5107 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) 5108 return arr; 5109 5110 // If the canonical form of this type isn't the right kind, reject it. 5111 if (!isa<ArrayType>(CanonicalType)) 5112 return 0; 5113 5114 // If this is a typedef for the type, strip the typedef off without 5115 // losing all typedef information. 5116 return cast<ArrayType>(getUnqualifiedDesugaredType()); 5117} 5118 5119template <typename T> const T *Type::castAs() const { 5120 ArrayType_cannot_be_used_with_getAs<T> at; 5121 (void) at; 5122 5123 assert(isa<T>(CanonicalType)); 5124 if (const T *ty = dyn_cast<T>(this)) return ty; 5125 return cast<T>(getUnqualifiedDesugaredType()); 5126} 5127 5128inline const ArrayType *Type::castAsArrayTypeUnsafe() const { 5129 assert(isa<ArrayType>(CanonicalType)); 5130 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) return arr; 5131 return cast<ArrayType>(getUnqualifiedDesugaredType()); 5132} 5133 5134} // end namespace clang 5135 5136#endif 5137